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b46acd6a KK |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * | |
4 | * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved. | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <linux/blkdev.h> | |
9 | #include <linux/buffer_head.h> | |
10 | #include <linux/fs.h> | |
11 | #include <linux/hash.h> | |
12 | #include <linux/nls.h> | |
13 | #include <linux/random.h> | |
14 | #include <linux/ratelimit.h> | |
15 | #include <linux/slab.h> | |
16 | ||
17 | #include "debug.h" | |
18 | #include "ntfs.h" | |
19 | #include "ntfs_fs.h" | |
20 | ||
21 | /* | |
22 | * LOG FILE structs | |
23 | */ | |
24 | ||
25 | // clang-format off | |
26 | ||
27 | #define MaxLogFileSize 0x100000000ull | |
28 | #define DefaultLogPageSize 4096 | |
29 | #define MinLogRecordPages 0x30 | |
30 | ||
31 | struct RESTART_HDR { | |
32 | struct NTFS_RECORD_HEADER rhdr; // 'RSTR' | |
e8b8e97f KA |
33 | __le32 sys_page_size; // 0x10: Page size of the system which initialized the log. |
34 | __le32 page_size; // 0x14: Log page size used for this log file. | |
b46acd6a KK |
35 | __le16 ra_off; // 0x18: |
36 | __le16 minor_ver; // 0x1A: | |
37 | __le16 major_ver; // 0x1C: | |
38 | __le16 fixups[]; | |
39 | }; | |
40 | ||
41 | #define LFS_NO_CLIENT 0xffff | |
42 | #define LFS_NO_CLIENT_LE cpu_to_le16(0xffff) | |
43 | ||
44 | struct CLIENT_REC { | |
45 | __le64 oldest_lsn; | |
46 | __le64 restart_lsn; // 0x08: | |
47 | __le16 prev_client; // 0x10: | |
48 | __le16 next_client; // 0x12: | |
49 | __le16 seq_num; // 0x14: | |
e8b8e97f KA |
50 | u8 align[6]; // 0x16: |
51 | __le32 name_bytes; // 0x1C: In bytes. | |
52 | __le16 name[32]; // 0x20: Name of client. | |
b46acd6a KK |
53 | }; |
54 | ||
55 | static_assert(sizeof(struct CLIENT_REC) == 0x60); | |
56 | ||
57 | /* Two copies of these will exist at the beginning of the log file */ | |
58 | struct RESTART_AREA { | |
e8b8e97f KA |
59 | __le64 current_lsn; // 0x00: Current logical end of log file. |
60 | __le16 log_clients; // 0x08: Maximum number of clients. | |
61 | __le16 client_idx[2]; // 0x0A: Free/use index into the client record arrays. | |
62 | __le16 flags; // 0x0E: See RESTART_SINGLE_PAGE_IO. | |
63 | __le32 seq_num_bits; // 0x10: The number of bits in sequence number. | |
b46acd6a KK |
64 | __le16 ra_len; // 0x14: |
65 | __le16 client_off; // 0x16: | |
66 | __le64 l_size; // 0x18: Usable log file size. | |
67 | __le32 last_lsn_data_len; // 0x20: | |
e8b8e97f KA |
68 | __le16 rec_hdr_len; // 0x24: Log page data offset. |
69 | __le16 data_off; // 0x26: Log page data length. | |
b46acd6a KK |
70 | __le32 open_log_count; // 0x28: |
71 | __le32 align[5]; // 0x2C: | |
72 | struct CLIENT_REC clients[]; // 0x40: | |
73 | }; | |
74 | ||
75 | struct LOG_REC_HDR { | |
76 | __le16 redo_op; // 0x00: NTFS_LOG_OPERATION | |
77 | __le16 undo_op; // 0x02: NTFS_LOG_OPERATION | |
e8b8e97f KA |
78 | __le16 redo_off; // 0x04: Offset to Redo record. |
79 | __le16 redo_len; // 0x06: Redo length. | |
80 | __le16 undo_off; // 0x08: Offset to Undo record. | |
81 | __le16 undo_len; // 0x0A: Undo length. | |
b46acd6a KK |
82 | __le16 target_attr; // 0x0C: |
83 | __le16 lcns_follow; // 0x0E: | |
84 | __le16 record_off; // 0x10: | |
85 | __le16 attr_off; // 0x12: | |
86 | __le16 cluster_off; // 0x14: | |
87 | __le16 reserved; // 0x16: | |
88 | __le64 target_vcn; // 0x18: | |
89 | __le64 page_lcns[]; // 0x20: | |
90 | }; | |
91 | ||
92 | static_assert(sizeof(struct LOG_REC_HDR) == 0x20); | |
93 | ||
94 | #define RESTART_ENTRY_ALLOCATED 0xFFFFFFFF | |
95 | #define RESTART_ENTRY_ALLOCATED_LE cpu_to_le32(0xFFFFFFFF) | |
96 | ||
97 | struct RESTART_TABLE { | |
e8b8e97f KA |
98 | __le16 size; // 0x00: In bytes |
99 | __le16 used; // 0x02: Entries | |
100 | __le16 total; // 0x04: Entries | |
b46acd6a KK |
101 | __le16 res[3]; // 0x06: |
102 | __le32 free_goal; // 0x0C: | |
e8b8e97f KA |
103 | __le32 first_free; // 0x10: |
104 | __le32 last_free; // 0x14: | |
b46acd6a KK |
105 | |
106 | }; | |
107 | ||
108 | static_assert(sizeof(struct RESTART_TABLE) == 0x18); | |
109 | ||
110 | struct ATTR_NAME_ENTRY { | |
e8b8e97f | 111 | __le16 off; // Offset in the Open attribute Table. |
b46acd6a KK |
112 | __le16 name_bytes; |
113 | __le16 name[]; | |
114 | }; | |
115 | ||
116 | struct OPEN_ATTR_ENRTY { | |
117 | __le32 next; // 0x00: RESTART_ENTRY_ALLOCATED if allocated | |
118 | __le32 bytes_per_index; // 0x04: | |
119 | enum ATTR_TYPE type; // 0x08: | |
120 | u8 is_dirty_pages; // 0x0C: | |
121 | u8 is_attr_name; // 0x0B: Faked field to manage 'ptr' | |
122 | u8 name_len; // 0x0C: Faked field to manage 'ptr' | |
123 | u8 res; | |
e8b8e97f | 124 | struct MFT_REF ref; // 0x10: File Reference of file containing attribute |
b46acd6a KK |
125 | __le64 open_record_lsn; // 0x18: |
126 | void *ptr; // 0x20: | |
127 | }; | |
128 | ||
129 | /* 32 bit version of 'struct OPEN_ATTR_ENRTY' */ | |
130 | struct OPEN_ATTR_ENRTY_32 { | |
131 | __le32 next; // 0x00: RESTART_ENTRY_ALLOCATED if allocated | |
132 | __le32 ptr; // 0x04: | |
133 | struct MFT_REF ref; // 0x08: | |
134 | __le64 open_record_lsn; // 0x10: | |
135 | u8 is_dirty_pages; // 0x18: | |
e8b8e97f | 136 | u8 is_attr_name; // 0x19: |
b46acd6a KK |
137 | u8 res1[2]; |
138 | enum ATTR_TYPE type; // 0x1C: | |
e8b8e97f | 139 | u8 name_len; // 0x20: In wchar |
b46acd6a KK |
140 | u8 res2[3]; |
141 | __le32 AttributeName; // 0x24: | |
142 | __le32 bytes_per_index; // 0x28: | |
143 | }; | |
144 | ||
145 | #define SIZEOF_OPENATTRIBUTEENTRY0 0x2c | |
146 | // static_assert( 0x2C == sizeof(struct OPEN_ATTR_ENRTY_32) ); | |
147 | static_assert(sizeof(struct OPEN_ATTR_ENRTY) < SIZEOF_OPENATTRIBUTEENTRY0); | |
148 | ||
149 | /* | |
e8b8e97f KA |
150 | * One entry exists in the Dirty Pages Table for each page which is dirty at |
151 | * the time the Restart Area is written. | |
b46acd6a KK |
152 | */ |
153 | struct DIR_PAGE_ENTRY { | |
e8b8e97f KA |
154 | __le32 next; // 0x00: RESTART_ENTRY_ALLOCATED if allocated |
155 | __le32 target_attr; // 0x04: Index into the Open attribute Table | |
b46acd6a KK |
156 | __le32 transfer_len; // 0x08: |
157 | __le32 lcns_follow; // 0x0C: | |
e8b8e97f | 158 | __le64 vcn; // 0x10: Vcn of dirty page |
b46acd6a KK |
159 | __le64 oldest_lsn; // 0x18: |
160 | __le64 page_lcns[]; // 0x20: | |
161 | }; | |
162 | ||
163 | static_assert(sizeof(struct DIR_PAGE_ENTRY) == 0x20); | |
164 | ||
165 | /* 32 bit version of 'struct DIR_PAGE_ENTRY' */ | |
166 | struct DIR_PAGE_ENTRY_32 { | |
e8b8e97f KA |
167 | __le32 next; // 0x00: RESTART_ENTRY_ALLOCATED if allocated |
168 | __le32 target_attr; // 0x04: Index into the Open attribute Table | |
169 | __le32 transfer_len; // 0x08: | |
170 | __le32 lcns_follow; // 0x0C: | |
171 | __le32 reserved; // 0x10: | |
172 | __le32 vcn_low; // 0x14: Vcn of dirty page | |
173 | __le32 vcn_hi; // 0x18: Vcn of dirty page | |
174 | __le32 oldest_lsn_low; // 0x1C: | |
175 | __le32 oldest_lsn_hi; // 0x1C: | |
176 | __le32 page_lcns_low; // 0x24: | |
177 | __le32 page_lcns_hi; // 0x24: | |
b46acd6a KK |
178 | }; |
179 | ||
180 | static_assert(offsetof(struct DIR_PAGE_ENTRY_32, vcn_low) == 0x14); | |
181 | static_assert(sizeof(struct DIR_PAGE_ENTRY_32) == 0x2c); | |
182 | ||
183 | enum transact_state { | |
184 | TransactionUninitialized = 0, | |
185 | TransactionActive, | |
186 | TransactionPrepared, | |
187 | TransactionCommitted | |
188 | }; | |
189 | ||
190 | struct TRANSACTION_ENTRY { | |
191 | __le32 next; // 0x00: RESTART_ENTRY_ALLOCATED if allocated | |
192 | u8 transact_state; // 0x04: | |
193 | u8 reserved[3]; // 0x05: | |
194 | __le64 first_lsn; // 0x08: | |
195 | __le64 prev_lsn; // 0x10: | |
196 | __le64 undo_next_lsn; // 0x18: | |
197 | __le32 undo_records; // 0x20: Number of undo log records pending abort | |
198 | __le32 undo_len; // 0x24: Total undo size | |
199 | }; | |
200 | ||
201 | static_assert(sizeof(struct TRANSACTION_ENTRY) == 0x28); | |
202 | ||
203 | struct NTFS_RESTART { | |
204 | __le32 major_ver; // 0x00: | |
205 | __le32 minor_ver; // 0x04: | |
206 | __le64 check_point_start; // 0x08: | |
207 | __le64 open_attr_table_lsn; // 0x10: | |
208 | __le64 attr_names_lsn; // 0x18: | |
209 | __le64 dirty_pages_table_lsn; // 0x20: | |
210 | __le64 transact_table_lsn; // 0x28: | |
211 | __le32 open_attr_len; // 0x30: In bytes | |
212 | __le32 attr_names_len; // 0x34: In bytes | |
213 | __le32 dirty_pages_len; // 0x38: In bytes | |
214 | __le32 transact_table_len; // 0x3C: In bytes | |
215 | }; | |
216 | ||
217 | static_assert(sizeof(struct NTFS_RESTART) == 0x40); | |
218 | ||
219 | struct NEW_ATTRIBUTE_SIZES { | |
220 | __le64 alloc_size; | |
221 | __le64 valid_size; | |
222 | __le64 data_size; | |
223 | __le64 total_size; | |
224 | }; | |
225 | ||
226 | struct BITMAP_RANGE { | |
227 | __le32 bitmap_off; | |
228 | __le32 bits; | |
229 | }; | |
230 | ||
231 | struct LCN_RANGE { | |
232 | __le64 lcn; | |
233 | __le64 len; | |
234 | }; | |
235 | ||
e8b8e97f | 236 | /* The following type defines the different log record types. */ |
b46acd6a KK |
237 | #define LfsClientRecord cpu_to_le32(1) |
238 | #define LfsClientRestart cpu_to_le32(2) | |
239 | ||
e8b8e97f | 240 | /* This is used to uniquely identify a client for a particular log file. */ |
b46acd6a KK |
241 | struct CLIENT_ID { |
242 | __le16 seq_num; | |
243 | __le16 client_idx; | |
244 | }; | |
245 | ||
e8b8e97f | 246 | /* This is the header that begins every Log Record in the log file. */ |
b46acd6a | 247 | struct LFS_RECORD_HDR { |
e8b8e97f KA |
248 | __le64 this_lsn; // 0x00: |
249 | __le64 client_prev_lsn; // 0x08: | |
250 | __le64 client_undo_next_lsn; // 0x10: | |
251 | __le32 client_data_len; // 0x18: | |
252 | struct CLIENT_ID client; // 0x1C: Owner of this log record. | |
253 | __le32 record_type; // 0x20: LfsClientRecord or LfsClientRestart. | |
254 | __le32 transact_id; // 0x24: | |
255 | __le16 flags; // 0x28: LOG_RECORD_MULTI_PAGE | |
256 | u8 align[6]; // 0x2A: | |
b46acd6a KK |
257 | }; |
258 | ||
259 | #define LOG_RECORD_MULTI_PAGE cpu_to_le16(1) | |
260 | ||
261 | static_assert(sizeof(struct LFS_RECORD_HDR) == 0x30); | |
262 | ||
263 | struct LFS_RECORD { | |
e8b8e97f KA |
264 | __le16 next_record_off; // 0x00: Offset of the free space in the page, |
265 | u8 align[6]; // 0x02: | |
266 | __le64 last_end_lsn; // 0x08: lsn for the last log record which ends on the page, | |
b46acd6a KK |
267 | }; |
268 | ||
269 | static_assert(sizeof(struct LFS_RECORD) == 0x10); | |
270 | ||
271 | struct RECORD_PAGE_HDR { | |
e8b8e97f KA |
272 | struct NTFS_RECORD_HEADER rhdr; // 'RCRD' |
273 | __le32 rflags; // 0x10: See LOG_PAGE_LOG_RECORD_END | |
274 | __le16 page_count; // 0x14: | |
275 | __le16 page_pos; // 0x16: | |
276 | struct LFS_RECORD record_hdr; // 0x18: | |
277 | __le16 fixups[10]; // 0x28: | |
278 | __le32 file_off; // 0x3c: Used when major version >= 2 | |
b46acd6a KK |
279 | }; |
280 | ||
281 | // clang-format on | |
282 | ||
e8b8e97f | 283 | // Page contains the end of a log record. |
b46acd6a KK |
284 | #define LOG_PAGE_LOG_RECORD_END cpu_to_le32(0x00000001) |
285 | ||
286 | static inline bool is_log_record_end(const struct RECORD_PAGE_HDR *hdr) | |
287 | { | |
288 | return hdr->rflags & LOG_PAGE_LOG_RECORD_END; | |
289 | } | |
290 | ||
291 | static_assert(offsetof(struct RECORD_PAGE_HDR, file_off) == 0x3c); | |
292 | ||
293 | /* | |
294 | * END of NTFS LOG structures | |
295 | */ | |
296 | ||
e8b8e97f | 297 | /* Define some tuning parameters to keep the restart tables a reasonable size. */ |
b46acd6a KK |
298 | #define INITIAL_NUMBER_TRANSACTIONS 5 |
299 | ||
300 | enum NTFS_LOG_OPERATION { | |
301 | ||
302 | Noop = 0x00, | |
303 | CompensationLogRecord = 0x01, | |
304 | InitializeFileRecordSegment = 0x02, | |
305 | DeallocateFileRecordSegment = 0x03, | |
306 | WriteEndOfFileRecordSegment = 0x04, | |
307 | CreateAttribute = 0x05, | |
308 | DeleteAttribute = 0x06, | |
309 | UpdateResidentValue = 0x07, | |
310 | UpdateNonresidentValue = 0x08, | |
311 | UpdateMappingPairs = 0x09, | |
312 | DeleteDirtyClusters = 0x0A, | |
313 | SetNewAttributeSizes = 0x0B, | |
314 | AddIndexEntryRoot = 0x0C, | |
315 | DeleteIndexEntryRoot = 0x0D, | |
316 | AddIndexEntryAllocation = 0x0E, | |
317 | DeleteIndexEntryAllocation = 0x0F, | |
318 | WriteEndOfIndexBuffer = 0x10, | |
319 | SetIndexEntryVcnRoot = 0x11, | |
320 | SetIndexEntryVcnAllocation = 0x12, | |
321 | UpdateFileNameRoot = 0x13, | |
322 | UpdateFileNameAllocation = 0x14, | |
323 | SetBitsInNonresidentBitMap = 0x15, | |
324 | ClearBitsInNonresidentBitMap = 0x16, | |
325 | HotFix = 0x17, | |
326 | EndTopLevelAction = 0x18, | |
327 | PrepareTransaction = 0x19, | |
328 | CommitTransaction = 0x1A, | |
329 | ForgetTransaction = 0x1B, | |
330 | OpenNonresidentAttribute = 0x1C, | |
331 | OpenAttributeTableDump = 0x1D, | |
332 | AttributeNamesDump = 0x1E, | |
333 | DirtyPageTableDump = 0x1F, | |
334 | TransactionTableDump = 0x20, | |
335 | UpdateRecordDataRoot = 0x21, | |
336 | UpdateRecordDataAllocation = 0x22, | |
337 | ||
338 | UpdateRelativeDataInIndex = | |
339 | 0x23, // NtOfsRestartUpdateRelativeDataInIndex | |
340 | UpdateRelativeDataInIndex2 = 0x24, | |
341 | ZeroEndOfFileRecord = 0x25, | |
342 | }; | |
343 | ||
344 | /* | |
e8b8e97f KA |
345 | * Array for log records which require a target attribute. |
346 | * A true indicates that the corresponding restart operation | |
347 | * requires a target attribute. | |
b46acd6a KK |
348 | */ |
349 | static const u8 AttributeRequired[] = { | |
350 | 0xFC, 0xFB, 0xFF, 0x10, 0x06, | |
351 | }; | |
352 | ||
353 | static inline bool is_target_required(u16 op) | |
354 | { | |
355 | bool ret = op <= UpdateRecordDataAllocation && | |
356 | (AttributeRequired[op >> 3] >> (op & 7) & 1); | |
357 | return ret; | |
358 | } | |
359 | ||
360 | static inline bool can_skip_action(enum NTFS_LOG_OPERATION op) | |
361 | { | |
362 | switch (op) { | |
363 | case Noop: | |
364 | case DeleteDirtyClusters: | |
365 | case HotFix: | |
366 | case EndTopLevelAction: | |
367 | case PrepareTransaction: | |
368 | case CommitTransaction: | |
369 | case ForgetTransaction: | |
370 | case CompensationLogRecord: | |
371 | case OpenNonresidentAttribute: | |
372 | case OpenAttributeTableDump: | |
373 | case AttributeNamesDump: | |
374 | case DirtyPageTableDump: | |
375 | case TransactionTableDump: | |
376 | return true; | |
377 | default: | |
378 | return false; | |
379 | } | |
380 | } | |
381 | ||
382 | enum { lcb_ctx_undo_next, lcb_ctx_prev, lcb_ctx_next }; | |
383 | ||
e8b8e97f | 384 | /* Bytes per restart table. */ |
b46acd6a KK |
385 | static inline u32 bytes_per_rt(const struct RESTART_TABLE *rt) |
386 | { | |
387 | return le16_to_cpu(rt->used) * le16_to_cpu(rt->size) + | |
388 | sizeof(struct RESTART_TABLE); | |
389 | } | |
390 | ||
e8b8e97f | 391 | /* Log record length. */ |
b46acd6a KK |
392 | static inline u32 lrh_length(const struct LOG_REC_HDR *lr) |
393 | { | |
394 | u16 t16 = le16_to_cpu(lr->lcns_follow); | |
395 | ||
396 | return struct_size(lr, page_lcns, max_t(u16, 1, t16)); | |
397 | } | |
398 | ||
399 | struct lcb { | |
e8b8e97f | 400 | struct LFS_RECORD_HDR *lrh; // Log record header of the current lsn. |
b46acd6a KK |
401 | struct LOG_REC_HDR *log_rec; |
402 | u32 ctx_mode; // lcb_ctx_undo_next/lcb_ctx_prev/lcb_ctx_next | |
403 | struct CLIENT_ID client; | |
e8b8e97f | 404 | bool alloc; // If true the we should deallocate 'log_rec'. |
b46acd6a KK |
405 | }; |
406 | ||
407 | static void lcb_put(struct lcb *lcb) | |
408 | { | |
409 | if (lcb->alloc) | |
195c52bd KA |
410 | kfree(lcb->log_rec); |
411 | kfree(lcb->lrh); | |
412 | kfree(lcb); | |
b46acd6a KK |
413 | } |
414 | ||
e8b8e97f | 415 | /* Find the oldest lsn from active clients. */ |
b46acd6a KK |
416 | static inline void oldest_client_lsn(const struct CLIENT_REC *ca, |
417 | __le16 next_client, u64 *oldest_lsn) | |
418 | { | |
419 | while (next_client != LFS_NO_CLIENT_LE) { | |
420 | const struct CLIENT_REC *cr = ca + le16_to_cpu(next_client); | |
421 | u64 lsn = le64_to_cpu(cr->oldest_lsn); | |
422 | ||
e8b8e97f | 423 | /* Ignore this block if it's oldest lsn is 0. */ |
b46acd6a KK |
424 | if (lsn && lsn < *oldest_lsn) |
425 | *oldest_lsn = lsn; | |
426 | ||
427 | next_client = cr->next_client; | |
428 | } | |
429 | } | |
430 | ||
431 | static inline bool is_rst_page_hdr_valid(u32 file_off, | |
432 | const struct RESTART_HDR *rhdr) | |
433 | { | |
434 | u32 sys_page = le32_to_cpu(rhdr->sys_page_size); | |
435 | u32 page_size = le32_to_cpu(rhdr->page_size); | |
436 | u32 end_usa; | |
437 | u16 ro; | |
438 | ||
439 | if (sys_page < SECTOR_SIZE || page_size < SECTOR_SIZE || | |
440 | sys_page & (sys_page - 1) || page_size & (page_size - 1)) { | |
441 | return false; | |
442 | } | |
443 | ||
e8b8e97f | 444 | /* Check that if the file offset isn't 0, it is the system page size. */ |
b46acd6a KK |
445 | if (file_off && file_off != sys_page) |
446 | return false; | |
447 | ||
e8b8e97f | 448 | /* Check support version 1.1+. */ |
b46acd6a KK |
449 | if (le16_to_cpu(rhdr->major_ver) <= 1 && !rhdr->minor_ver) |
450 | return false; | |
451 | ||
452 | if (le16_to_cpu(rhdr->major_ver) > 2) | |
453 | return false; | |
454 | ||
455 | ro = le16_to_cpu(rhdr->ra_off); | |
fa3cacf5 | 456 | if (!IS_ALIGNED(ro, 8) || ro > sys_page) |
b46acd6a KK |
457 | return false; |
458 | ||
459 | end_usa = ((sys_page >> SECTOR_SHIFT) + 1) * sizeof(short); | |
460 | end_usa += le16_to_cpu(rhdr->rhdr.fix_off); | |
461 | ||
462 | if (ro < end_usa) | |
463 | return false; | |
464 | ||
465 | return true; | |
466 | } | |
467 | ||
468 | static inline bool is_rst_area_valid(const struct RESTART_HDR *rhdr) | |
469 | { | |
470 | const struct RESTART_AREA *ra; | |
471 | u16 cl, fl, ul; | |
472 | u32 off, l_size, file_dat_bits, file_size_round; | |
473 | u16 ro = le16_to_cpu(rhdr->ra_off); | |
474 | u32 sys_page = le32_to_cpu(rhdr->sys_page_size); | |
475 | ||
476 | if (ro + offsetof(struct RESTART_AREA, l_size) > | |
477 | SECTOR_SIZE - sizeof(short)) | |
478 | return false; | |
479 | ||
480 | ra = Add2Ptr(rhdr, ro); | |
481 | cl = le16_to_cpu(ra->log_clients); | |
482 | ||
483 | if (cl > 1) | |
484 | return false; | |
485 | ||
486 | off = le16_to_cpu(ra->client_off); | |
487 | ||
fa3cacf5 | 488 | if (!IS_ALIGNED(off, 8) || ro + off > SECTOR_SIZE - sizeof(short)) |
b46acd6a KK |
489 | return false; |
490 | ||
491 | off += cl * sizeof(struct CLIENT_REC); | |
492 | ||
493 | if (off > sys_page) | |
494 | return false; | |
495 | ||
496 | /* | |
497 | * Check the restart length field and whether the entire | |
e8b8e97f | 498 | * restart area is contained that length. |
b46acd6a KK |
499 | */ |
500 | if (le16_to_cpu(rhdr->ra_off) + le16_to_cpu(ra->ra_len) > sys_page || | |
501 | off > le16_to_cpu(ra->ra_len)) { | |
502 | return false; | |
503 | } | |
504 | ||
505 | /* | |
506 | * As a final check make sure that the use list and the free list | |
e8b8e97f | 507 | * are either empty or point to a valid client. |
b46acd6a KK |
508 | */ |
509 | fl = le16_to_cpu(ra->client_idx[0]); | |
510 | ul = le16_to_cpu(ra->client_idx[1]); | |
511 | if ((fl != LFS_NO_CLIENT && fl >= cl) || | |
512 | (ul != LFS_NO_CLIENT && ul >= cl)) | |
513 | return false; | |
514 | ||
e8b8e97f | 515 | /* Make sure the sequence number bits match the log file size. */ |
b46acd6a KK |
516 | l_size = le64_to_cpu(ra->l_size); |
517 | ||
518 | file_dat_bits = sizeof(u64) * 8 - le32_to_cpu(ra->seq_num_bits); | |
519 | file_size_round = 1u << (file_dat_bits + 3); | |
520 | if (file_size_round != l_size && | |
521 | (file_size_round < l_size || (file_size_round / 2) > l_size)) { | |
522 | return false; | |
523 | } | |
524 | ||
e8b8e97f | 525 | /* The log page data offset and record header length must be quad-aligned. */ |
fa3cacf5 KA |
526 | if (!IS_ALIGNED(le16_to_cpu(ra->data_off), 8) || |
527 | !IS_ALIGNED(le16_to_cpu(ra->rec_hdr_len), 8)) | |
b46acd6a KK |
528 | return false; |
529 | ||
530 | return true; | |
531 | } | |
532 | ||
533 | static inline bool is_client_area_valid(const struct RESTART_HDR *rhdr, | |
534 | bool usa_error) | |
535 | { | |
536 | u16 ro = le16_to_cpu(rhdr->ra_off); | |
537 | const struct RESTART_AREA *ra = Add2Ptr(rhdr, ro); | |
538 | u16 ra_len = le16_to_cpu(ra->ra_len); | |
539 | const struct CLIENT_REC *ca; | |
540 | u32 i; | |
541 | ||
542 | if (usa_error && ra_len + ro > SECTOR_SIZE - sizeof(short)) | |
543 | return false; | |
544 | ||
e8b8e97f | 545 | /* Find the start of the client array. */ |
b46acd6a KK |
546 | ca = Add2Ptr(ra, le16_to_cpu(ra->client_off)); |
547 | ||
548 | /* | |
e8b8e97f KA |
549 | * Start with the free list. |
550 | * Check that all the clients are valid and that there isn't a cycle. | |
551 | * Do the in-use list on the second pass. | |
b46acd6a KK |
552 | */ |
553 | for (i = 0; i < 2; i++) { | |
554 | u16 client_idx = le16_to_cpu(ra->client_idx[i]); | |
555 | bool first_client = true; | |
556 | u16 clients = le16_to_cpu(ra->log_clients); | |
557 | ||
558 | while (client_idx != LFS_NO_CLIENT) { | |
559 | const struct CLIENT_REC *cr; | |
560 | ||
561 | if (!clients || | |
562 | client_idx >= le16_to_cpu(ra->log_clients)) | |
563 | return false; | |
564 | ||
565 | clients -= 1; | |
566 | cr = ca + client_idx; | |
567 | ||
568 | client_idx = le16_to_cpu(cr->next_client); | |
569 | ||
570 | if (first_client) { | |
571 | first_client = false; | |
572 | if (cr->prev_client != LFS_NO_CLIENT_LE) | |
573 | return false; | |
574 | } | |
575 | } | |
576 | } | |
577 | ||
578 | return true; | |
579 | } | |
580 | ||
581 | /* | |
582 | * remove_client | |
583 | * | |
e8b8e97f | 584 | * Remove a client record from a client record list an restart area. |
b46acd6a KK |
585 | */ |
586 | static inline void remove_client(struct CLIENT_REC *ca, | |
587 | const struct CLIENT_REC *cr, __le16 *head) | |
588 | { | |
589 | if (cr->prev_client == LFS_NO_CLIENT_LE) | |
590 | *head = cr->next_client; | |
591 | else | |
592 | ca[le16_to_cpu(cr->prev_client)].next_client = cr->next_client; | |
593 | ||
594 | if (cr->next_client != LFS_NO_CLIENT_LE) | |
595 | ca[le16_to_cpu(cr->next_client)].prev_client = cr->prev_client; | |
596 | } | |
597 | ||
598 | /* | |
e8b8e97f | 599 | * add_client - Add a client record to the start of a list. |
b46acd6a KK |
600 | */ |
601 | static inline void add_client(struct CLIENT_REC *ca, u16 index, __le16 *head) | |
602 | { | |
603 | struct CLIENT_REC *cr = ca + index; | |
604 | ||
605 | cr->prev_client = LFS_NO_CLIENT_LE; | |
606 | cr->next_client = *head; | |
607 | ||
608 | if (*head != LFS_NO_CLIENT_LE) | |
609 | ca[le16_to_cpu(*head)].prev_client = cpu_to_le16(index); | |
610 | ||
611 | *head = cpu_to_le16(index); | |
612 | } | |
613 | ||
b46acd6a KK |
614 | static inline void *enum_rstbl(struct RESTART_TABLE *t, void *c) |
615 | { | |
616 | __le32 *e; | |
617 | u32 bprt; | |
618 | u16 rsize = t ? le16_to_cpu(t->size) : 0; | |
619 | ||
620 | if (!c) { | |
621 | if (!t || !t->total) | |
622 | return NULL; | |
623 | e = Add2Ptr(t, sizeof(struct RESTART_TABLE)); | |
624 | } else { | |
625 | e = Add2Ptr(c, rsize); | |
626 | } | |
627 | ||
e8b8e97f | 628 | /* Loop until we hit the first one allocated, or the end of the list. */ |
b46acd6a KK |
629 | for (bprt = bytes_per_rt(t); PtrOffset(t, e) < bprt; |
630 | e = Add2Ptr(e, rsize)) { | |
631 | if (*e == RESTART_ENTRY_ALLOCATED_LE) | |
632 | return e; | |
633 | } | |
634 | return NULL; | |
635 | } | |
636 | ||
637 | /* | |
e8b8e97f | 638 | * find_dp - Search for a @vcn in Dirty Page Table. |
b46acd6a KK |
639 | */ |
640 | static inline struct DIR_PAGE_ENTRY *find_dp(struct RESTART_TABLE *dptbl, | |
641 | u32 target_attr, u64 vcn) | |
642 | { | |
643 | __le32 ta = cpu_to_le32(target_attr); | |
644 | struct DIR_PAGE_ENTRY *dp = NULL; | |
645 | ||
646 | while ((dp = enum_rstbl(dptbl, dp))) { | |
647 | u64 dp_vcn = le64_to_cpu(dp->vcn); | |
648 | ||
649 | if (dp->target_attr == ta && vcn >= dp_vcn && | |
650 | vcn < dp_vcn + le32_to_cpu(dp->lcns_follow)) { | |
651 | return dp; | |
652 | } | |
653 | } | |
654 | return NULL; | |
655 | } | |
656 | ||
657 | static inline u32 norm_file_page(u32 page_size, u32 *l_size, bool use_default) | |
658 | { | |
659 | if (use_default) | |
660 | page_size = DefaultLogPageSize; | |
661 | ||
e8b8e97f | 662 | /* Round the file size down to a system page boundary. */ |
b46acd6a KK |
663 | *l_size &= ~(page_size - 1); |
664 | ||
e8b8e97f | 665 | /* File should contain at least 2 restart pages and MinLogRecordPages pages. */ |
b46acd6a KK |
666 | if (*l_size < (MinLogRecordPages + 2) * page_size) |
667 | return 0; | |
668 | ||
669 | return page_size; | |
670 | } | |
671 | ||
672 | static bool check_log_rec(const struct LOG_REC_HDR *lr, u32 bytes, u32 tr, | |
673 | u32 bytes_per_attr_entry) | |
674 | { | |
675 | u16 t16; | |
676 | ||
677 | if (bytes < sizeof(struct LOG_REC_HDR)) | |
678 | return false; | |
679 | if (!tr) | |
680 | return false; | |
681 | ||
682 | if ((tr - sizeof(struct RESTART_TABLE)) % | |
683 | sizeof(struct TRANSACTION_ENTRY)) | |
684 | return false; | |
685 | ||
686 | if (le16_to_cpu(lr->redo_off) & 7) | |
687 | return false; | |
688 | ||
689 | if (le16_to_cpu(lr->undo_off) & 7) | |
690 | return false; | |
691 | ||
692 | if (lr->target_attr) | |
693 | goto check_lcns; | |
694 | ||
695 | if (is_target_required(le16_to_cpu(lr->redo_op))) | |
696 | return false; | |
697 | ||
698 | if (is_target_required(le16_to_cpu(lr->undo_op))) | |
699 | return false; | |
700 | ||
701 | check_lcns: | |
702 | if (!lr->lcns_follow) | |
703 | goto check_length; | |
704 | ||
705 | t16 = le16_to_cpu(lr->target_attr); | |
706 | if ((t16 - sizeof(struct RESTART_TABLE)) % bytes_per_attr_entry) | |
707 | return false; | |
708 | ||
709 | check_length: | |
710 | if (bytes < lrh_length(lr)) | |
711 | return false; | |
712 | ||
713 | return true; | |
714 | } | |
715 | ||
716 | static bool check_rstbl(const struct RESTART_TABLE *rt, size_t bytes) | |
717 | { | |
718 | u32 ts; | |
719 | u32 i, off; | |
720 | u16 rsize = le16_to_cpu(rt->size); | |
721 | u16 ne = le16_to_cpu(rt->used); | |
722 | u32 ff = le32_to_cpu(rt->first_free); | |
723 | u32 lf = le32_to_cpu(rt->last_free); | |
724 | ||
725 | ts = rsize * ne + sizeof(struct RESTART_TABLE); | |
726 | ||
727 | if (!rsize || rsize > bytes || | |
728 | rsize + sizeof(struct RESTART_TABLE) > bytes || bytes < ts || | |
729 | le16_to_cpu(rt->total) > ne || ff > ts || lf > ts || | |
730 | (ff && ff < sizeof(struct RESTART_TABLE)) || | |
731 | (lf && lf < sizeof(struct RESTART_TABLE))) { | |
732 | return false; | |
733 | } | |
734 | ||
e8b8e97f KA |
735 | /* |
736 | * Verify each entry is either allocated or points | |
737 | * to a valid offset the table. | |
b46acd6a KK |
738 | */ |
739 | for (i = 0; i < ne; i++) { | |
740 | off = le32_to_cpu(*(__le32 *)Add2Ptr( | |
741 | rt, i * rsize + sizeof(struct RESTART_TABLE))); | |
742 | ||
743 | if (off != RESTART_ENTRY_ALLOCATED && off && | |
744 | (off < sizeof(struct RESTART_TABLE) || | |
745 | ((off - sizeof(struct RESTART_TABLE)) % rsize))) { | |
746 | return false; | |
747 | } | |
748 | } | |
749 | ||
e8b8e97f KA |
750 | /* |
751 | * Walk through the list headed by the first entry to make | |
752 | * sure none of the entries are currently being used. | |
b46acd6a KK |
753 | */ |
754 | for (off = ff; off;) { | |
755 | if (off == RESTART_ENTRY_ALLOCATED) | |
756 | return false; | |
757 | ||
758 | off = le32_to_cpu(*(__le32 *)Add2Ptr(rt, off)); | |
759 | } | |
760 | ||
761 | return true; | |
762 | } | |
763 | ||
764 | /* | |
e8b8e97f | 765 | * free_rsttbl_idx - Free a previously allocated index a Restart Table. |
b46acd6a KK |
766 | */ |
767 | static inline void free_rsttbl_idx(struct RESTART_TABLE *rt, u32 off) | |
768 | { | |
769 | __le32 *e; | |
770 | u32 lf = le32_to_cpu(rt->last_free); | |
771 | __le32 off_le = cpu_to_le32(off); | |
772 | ||
773 | e = Add2Ptr(rt, off); | |
774 | ||
775 | if (off < le32_to_cpu(rt->free_goal)) { | |
776 | *e = rt->first_free; | |
777 | rt->first_free = off_le; | |
778 | if (!lf) | |
779 | rt->last_free = off_le; | |
780 | } else { | |
781 | if (lf) | |
782 | *(__le32 *)Add2Ptr(rt, lf) = off_le; | |
783 | else | |
784 | rt->first_free = off_le; | |
785 | ||
786 | rt->last_free = off_le; | |
787 | *e = 0; | |
788 | } | |
789 | ||
790 | le16_sub_cpu(&rt->total, 1); | |
791 | } | |
792 | ||
793 | static inline struct RESTART_TABLE *init_rsttbl(u16 esize, u16 used) | |
794 | { | |
795 | __le32 *e, *last_free; | |
796 | u32 off; | |
797 | u32 bytes = esize * used + sizeof(struct RESTART_TABLE); | |
798 | u32 lf = sizeof(struct RESTART_TABLE) + (used - 1) * esize; | |
195c52bd | 799 | struct RESTART_TABLE *t = kzalloc(bytes, GFP_NOFS); |
b46acd6a | 800 | |
a1b04d38 DC |
801 | if (!t) |
802 | return NULL; | |
803 | ||
b46acd6a KK |
804 | t->size = cpu_to_le16(esize); |
805 | t->used = cpu_to_le16(used); | |
806 | t->free_goal = cpu_to_le32(~0u); | |
807 | t->first_free = cpu_to_le32(sizeof(struct RESTART_TABLE)); | |
808 | t->last_free = cpu_to_le32(lf); | |
809 | ||
810 | e = (__le32 *)(t + 1); | |
811 | last_free = Add2Ptr(t, lf); | |
812 | ||
813 | for (off = sizeof(struct RESTART_TABLE) + esize; e < last_free; | |
814 | e = Add2Ptr(e, esize), off += esize) { | |
815 | *e = cpu_to_le32(off); | |
816 | } | |
817 | return t; | |
818 | } | |
819 | ||
820 | static inline struct RESTART_TABLE *extend_rsttbl(struct RESTART_TABLE *tbl, | |
821 | u32 add, u32 free_goal) | |
822 | { | |
823 | u16 esize = le16_to_cpu(tbl->size); | |
824 | __le32 osize = cpu_to_le32(bytes_per_rt(tbl)); | |
825 | u32 used = le16_to_cpu(tbl->used); | |
a1b04d38 DC |
826 | struct RESTART_TABLE *rt; |
827 | ||
828 | rt = init_rsttbl(esize, used + add); | |
829 | if (!rt) | |
830 | return NULL; | |
b46acd6a KK |
831 | |
832 | memcpy(rt + 1, tbl + 1, esize * used); | |
833 | ||
834 | rt->free_goal = free_goal == ~0u | |
835 | ? cpu_to_le32(~0u) | |
836 | : cpu_to_le32(sizeof(struct RESTART_TABLE) + | |
837 | free_goal * esize); | |
838 | ||
839 | if (tbl->first_free) { | |
840 | rt->first_free = tbl->first_free; | |
841 | *(__le32 *)Add2Ptr(rt, le32_to_cpu(tbl->last_free)) = osize; | |
842 | } else { | |
843 | rt->first_free = osize; | |
844 | } | |
845 | ||
846 | rt->total = tbl->total; | |
847 | ||
195c52bd | 848 | kfree(tbl); |
b46acd6a KK |
849 | return rt; |
850 | } | |
851 | ||
852 | /* | |
853 | * alloc_rsttbl_idx | |
854 | * | |
e8b8e97f | 855 | * Allocate an index from within a previously initialized Restart Table. |
b46acd6a KK |
856 | */ |
857 | static inline void *alloc_rsttbl_idx(struct RESTART_TABLE **tbl) | |
858 | { | |
859 | u32 off; | |
860 | __le32 *e; | |
861 | struct RESTART_TABLE *t = *tbl; | |
862 | ||
a1b04d38 | 863 | if (!t->first_free) { |
b46acd6a | 864 | *tbl = t = extend_rsttbl(t, 16, ~0u); |
a1b04d38 DC |
865 | if (!t) |
866 | return NULL; | |
867 | } | |
b46acd6a KK |
868 | |
869 | off = le32_to_cpu(t->first_free); | |
870 | ||
871 | /* Dequeue this entry and zero it. */ | |
872 | e = Add2Ptr(t, off); | |
873 | ||
874 | t->first_free = *e; | |
875 | ||
876 | memset(e, 0, le16_to_cpu(t->size)); | |
877 | ||
878 | *e = RESTART_ENTRY_ALLOCATED_LE; | |
879 | ||
880 | /* If list is going empty, then we fix the last_free as well. */ | |
881 | if (!t->first_free) | |
882 | t->last_free = 0; | |
883 | ||
884 | le16_add_cpu(&t->total, 1); | |
885 | ||
886 | return Add2Ptr(t, off); | |
887 | } | |
888 | ||
889 | /* | |
890 | * alloc_rsttbl_from_idx | |
891 | * | |
e8b8e97f | 892 | * Allocate a specific index from within a previously initialized Restart Table. |
b46acd6a KK |
893 | */ |
894 | static inline void *alloc_rsttbl_from_idx(struct RESTART_TABLE **tbl, u32 vbo) | |
895 | { | |
896 | u32 off; | |
897 | __le32 *e; | |
898 | struct RESTART_TABLE *rt = *tbl; | |
899 | u32 bytes = bytes_per_rt(rt); | |
900 | u16 esize = le16_to_cpu(rt->size); | |
901 | ||
e8b8e97f | 902 | /* If the entry is not the table, we will have to extend the table. */ |
b46acd6a KK |
903 | if (vbo >= bytes) { |
904 | /* | |
e8b8e97f KA |
905 | * Extend the size by computing the number of entries between |
906 | * the existing size and the desired index and adding 1 to that. | |
b46acd6a KK |
907 | */ |
908 | u32 bytes2idx = vbo - bytes; | |
909 | ||
e8b8e97f KA |
910 | /* |
911 | * There should always be an integral number of entries | |
912 | * being added. Now extend the table. | |
913 | */ | |
b46acd6a KK |
914 | *tbl = rt = extend_rsttbl(rt, bytes2idx / esize + 1, bytes); |
915 | if (!rt) | |
916 | return NULL; | |
917 | } | |
918 | ||
e8b8e97f | 919 | /* See if the entry is already allocated, and just return if it is. */ |
b46acd6a KK |
920 | e = Add2Ptr(rt, vbo); |
921 | ||
922 | if (*e == RESTART_ENTRY_ALLOCATED_LE) | |
923 | return e; | |
924 | ||
925 | /* | |
926 | * Walk through the table, looking for the entry we're | |
e8b8e97f | 927 | * interested and the previous entry. |
b46acd6a KK |
928 | */ |
929 | off = le32_to_cpu(rt->first_free); | |
930 | e = Add2Ptr(rt, off); | |
931 | ||
932 | if (off == vbo) { | |
933 | /* this is a match */ | |
934 | rt->first_free = *e; | |
935 | goto skip_looking; | |
936 | } | |
937 | ||
938 | /* | |
e8b8e97f KA |
939 | * Need to walk through the list looking for the predecessor |
940 | * of our entry. | |
b46acd6a KK |
941 | */ |
942 | for (;;) { | |
943 | /* Remember the entry just found */ | |
944 | u32 last_off = off; | |
945 | __le32 *last_e = e; | |
946 | ||
e8b8e97f | 947 | /* Should never run of entries. */ |
b46acd6a | 948 | |
e8b8e97f | 949 | /* Lookup up the next entry the list. */ |
b46acd6a KK |
950 | off = le32_to_cpu(*last_e); |
951 | e = Add2Ptr(rt, off); | |
952 | ||
e8b8e97f | 953 | /* If this is our match we are done. */ |
b46acd6a KK |
954 | if (off == vbo) { |
955 | *last_e = *e; | |
956 | ||
e8b8e97f KA |
957 | /* |
958 | * If this was the last entry, we update that | |
959 | * table as well. | |
960 | */ | |
b46acd6a KK |
961 | if (le32_to_cpu(rt->last_free) == off) |
962 | rt->last_free = cpu_to_le32(last_off); | |
963 | break; | |
964 | } | |
965 | } | |
966 | ||
967 | skip_looking: | |
e8b8e97f | 968 | /* If the list is now empty, we fix the last_free as well. */ |
b46acd6a KK |
969 | if (!rt->first_free) |
970 | rt->last_free = 0; | |
971 | ||
e8b8e97f | 972 | /* Zero this entry. */ |
b46acd6a KK |
973 | memset(e, 0, esize); |
974 | *e = RESTART_ENTRY_ALLOCATED_LE; | |
975 | ||
976 | le16_add_cpu(&rt->total, 1); | |
977 | ||
978 | return e; | |
979 | } | |
980 | ||
981 | #define RESTART_SINGLE_PAGE_IO cpu_to_le16(0x0001) | |
982 | ||
983 | #define NTFSLOG_WRAPPED 0x00000001 | |
984 | #define NTFSLOG_MULTIPLE_PAGE_IO 0x00000002 | |
985 | #define NTFSLOG_NO_LAST_LSN 0x00000004 | |
986 | #define NTFSLOG_REUSE_TAIL 0x00000010 | |
987 | #define NTFSLOG_NO_OLDEST_LSN 0x00000020 | |
988 | ||
e8b8e97f | 989 | /* Helper struct to work with NTFS $LogFile. */ |
b46acd6a KK |
990 | struct ntfs_log { |
991 | struct ntfs_inode *ni; | |
992 | ||
993 | u32 l_size; | |
994 | u32 sys_page_size; | |
995 | u32 sys_page_mask; | |
996 | u32 page_size; | |
997 | u32 page_mask; // page_size - 1 | |
998 | u8 page_bits; | |
999 | struct RECORD_PAGE_HDR *one_page_buf; | |
1000 | ||
1001 | struct RESTART_TABLE *open_attr_tbl; | |
1002 | u32 transaction_id; | |
1003 | u32 clst_per_page; | |
1004 | ||
1005 | u32 first_page; | |
1006 | u32 next_page; | |
1007 | u32 ra_off; | |
1008 | u32 data_off; | |
1009 | u32 restart_size; | |
1010 | u32 data_size; | |
1011 | u16 record_header_len; | |
1012 | u64 seq_num; | |
1013 | u32 seq_num_bits; | |
1014 | u32 file_data_bits; | |
1015 | u32 seq_num_mask; /* (1 << file_data_bits) - 1 */ | |
1016 | ||
e8b8e97f KA |
1017 | struct RESTART_AREA *ra; /* In-memory image of the next restart area. */ |
1018 | u32 ra_size; /* The usable size of the restart area. */ | |
b46acd6a KK |
1019 | |
1020 | /* | |
1021 | * If true, then the in-memory restart area is to be written | |
e8b8e97f | 1022 | * to the first position on the disk. |
b46acd6a KK |
1023 | */ |
1024 | bool init_ra; | |
e8b8e97f | 1025 | bool set_dirty; /* True if we need to set dirty flag. */ |
b46acd6a KK |
1026 | |
1027 | u64 oldest_lsn; | |
1028 | ||
1029 | u32 oldest_lsn_off; | |
1030 | u64 last_lsn; | |
1031 | ||
1032 | u32 total_avail; | |
1033 | u32 total_avail_pages; | |
1034 | u32 total_undo_commit; | |
1035 | u32 max_current_avail; | |
1036 | u32 current_avail; | |
1037 | u32 reserved; | |
1038 | ||
1039 | short major_ver; | |
1040 | short minor_ver; | |
1041 | ||
1042 | u32 l_flags; /* See NTFSLOG_XXX */ | |
e8b8e97f | 1043 | u32 current_openlog_count; /* On-disk value for open_log_count. */ |
b46acd6a KK |
1044 | |
1045 | struct CLIENT_ID client_id; | |
1046 | u32 client_undo_commit; | |
1047 | }; | |
1048 | ||
1049 | static inline u32 lsn_to_vbo(struct ntfs_log *log, const u64 lsn) | |
1050 | { | |
1051 | u32 vbo = (lsn << log->seq_num_bits) >> (log->seq_num_bits - 3); | |
1052 | ||
1053 | return vbo; | |
1054 | } | |
1055 | ||
e8b8e97f | 1056 | /* Compute the offset in the log file of the next log page. */ |
b46acd6a KK |
1057 | static inline u32 next_page_off(struct ntfs_log *log, u32 off) |
1058 | { | |
1059 | off = (off & ~log->sys_page_mask) + log->page_size; | |
1060 | return off >= log->l_size ? log->first_page : off; | |
1061 | } | |
1062 | ||
1063 | static inline u32 lsn_to_page_off(struct ntfs_log *log, u64 lsn) | |
1064 | { | |
1065 | return (((u32)lsn) << 3) & log->page_mask; | |
1066 | } | |
1067 | ||
1068 | static inline u64 vbo_to_lsn(struct ntfs_log *log, u32 off, u64 Seq) | |
1069 | { | |
1070 | return (off >> 3) + (Seq << log->file_data_bits); | |
1071 | } | |
1072 | ||
1073 | static inline bool is_lsn_in_file(struct ntfs_log *log, u64 lsn) | |
1074 | { | |
1075 | return lsn >= log->oldest_lsn && | |
1076 | lsn <= le64_to_cpu(log->ra->current_lsn); | |
1077 | } | |
1078 | ||
1079 | static inline u32 hdr_file_off(struct ntfs_log *log, | |
1080 | struct RECORD_PAGE_HDR *hdr) | |
1081 | { | |
1082 | if (log->major_ver < 2) | |
1083 | return le64_to_cpu(hdr->rhdr.lsn); | |
1084 | ||
1085 | return le32_to_cpu(hdr->file_off); | |
1086 | } | |
1087 | ||
1088 | static inline u64 base_lsn(struct ntfs_log *log, | |
1089 | const struct RECORD_PAGE_HDR *hdr, u64 lsn) | |
1090 | { | |
1091 | u64 h_lsn = le64_to_cpu(hdr->rhdr.lsn); | |
1092 | u64 ret = (((h_lsn >> log->file_data_bits) + | |
1093 | (lsn < (lsn_to_vbo(log, h_lsn) & ~log->page_mask) ? 1 : 0)) | |
1094 | << log->file_data_bits) + | |
1095 | ((((is_log_record_end(hdr) && | |
1096 | h_lsn <= le64_to_cpu(hdr->record_hdr.last_end_lsn)) | |
1097 | ? le16_to_cpu(hdr->record_hdr.next_record_off) | |
1098 | : log->page_size) + | |
1099 | lsn) >> | |
1100 | 3); | |
1101 | ||
1102 | return ret; | |
1103 | } | |
1104 | ||
1105 | static inline bool verify_client_lsn(struct ntfs_log *log, | |
1106 | const struct CLIENT_REC *client, u64 lsn) | |
1107 | { | |
1108 | return lsn >= le64_to_cpu(client->oldest_lsn) && | |
1109 | lsn <= le64_to_cpu(log->ra->current_lsn) && lsn; | |
1110 | } | |
1111 | ||
1112 | struct restart_info { | |
1113 | u64 last_lsn; | |
1114 | struct RESTART_HDR *r_page; | |
1115 | u32 vbo; | |
1116 | bool chkdsk_was_run; | |
1117 | bool valid_page; | |
1118 | bool initialized; | |
1119 | bool restart; | |
1120 | }; | |
1121 | ||
1122 | static int read_log_page(struct ntfs_log *log, u32 vbo, | |
1123 | struct RECORD_PAGE_HDR **buffer, bool *usa_error) | |
1124 | { | |
1125 | int err = 0; | |
1126 | u32 page_idx = vbo >> log->page_bits; | |
1127 | u32 page_off = vbo & log->page_mask; | |
1128 | u32 bytes = log->page_size - page_off; | |
1129 | void *to_free = NULL; | |
1130 | u32 page_vbo = page_idx << log->page_bits; | |
1131 | struct RECORD_PAGE_HDR *page_buf; | |
1132 | struct ntfs_inode *ni = log->ni; | |
1133 | bool bBAAD; | |
1134 | ||
1135 | if (vbo >= log->l_size) | |
1136 | return -EINVAL; | |
1137 | ||
1138 | if (!*buffer) { | |
195c52bd | 1139 | to_free = kmalloc(bytes, GFP_NOFS); |
b46acd6a KK |
1140 | if (!to_free) |
1141 | return -ENOMEM; | |
1142 | *buffer = to_free; | |
1143 | } | |
1144 | ||
1145 | page_buf = page_off ? log->one_page_buf : *buffer; | |
1146 | ||
1147 | err = ntfs_read_run_nb(ni->mi.sbi, &ni->file.run, page_vbo, page_buf, | |
1148 | log->page_size, NULL); | |
1149 | if (err) | |
1150 | goto out; | |
1151 | ||
1152 | if (page_buf->rhdr.sign != NTFS_FFFF_SIGNATURE) | |
1153 | ntfs_fix_post_read(&page_buf->rhdr, PAGE_SIZE, false); | |
1154 | ||
1155 | if (page_buf != *buffer) | |
1156 | memcpy(*buffer, Add2Ptr(page_buf, page_off), bytes); | |
1157 | ||
1158 | bBAAD = page_buf->rhdr.sign == NTFS_BAAD_SIGNATURE; | |
1159 | ||
1160 | if (usa_error) | |
1161 | *usa_error = bBAAD; | |
1162 | /* Check that the update sequence array for this page is valid */ | |
1163 | /* If we don't allow errors, raise an error status */ | |
1164 | else if (bBAAD) | |
1165 | err = -EINVAL; | |
1166 | ||
1167 | out: | |
1168 | if (err && to_free) { | |
195c52bd | 1169 | kfree(to_free); |
b46acd6a KK |
1170 | *buffer = NULL; |
1171 | } | |
1172 | ||
1173 | return err; | |
1174 | } | |
1175 | ||
1176 | /* | |
1177 | * log_read_rst | |
1178 | * | |
e8b8e97f KA |
1179 | * It walks through 512 blocks of the file looking for a valid |
1180 | * restart page header. It will stop the first time we find a | |
1181 | * valid page header. | |
b46acd6a KK |
1182 | */ |
1183 | static int log_read_rst(struct ntfs_log *log, u32 l_size, bool first, | |
1184 | struct restart_info *info) | |
1185 | { | |
1186 | u32 skip, vbo; | |
195c52bd | 1187 | struct RESTART_HDR *r_page = kmalloc(DefaultLogPageSize, GFP_NOFS); |
b46acd6a KK |
1188 | |
1189 | if (!r_page) | |
1190 | return -ENOMEM; | |
1191 | ||
1192 | memset(info, 0, sizeof(struct restart_info)); | |
1193 | ||
e8b8e97f | 1194 | /* Determine which restart area we are looking for. */ |
b46acd6a KK |
1195 | if (first) { |
1196 | vbo = 0; | |
1197 | skip = 512; | |
1198 | } else { | |
1199 | vbo = 512; | |
1200 | skip = 0; | |
1201 | } | |
1202 | ||
e8b8e97f | 1203 | /* Loop continuously until we succeed. */ |
b46acd6a KK |
1204 | for (; vbo < l_size; vbo = 2 * vbo + skip, skip = 0) { |
1205 | bool usa_error; | |
1206 | u32 sys_page_size; | |
1207 | bool brst, bchk; | |
1208 | struct RESTART_AREA *ra; | |
1209 | ||
e8b8e97f | 1210 | /* Read a page header at the current offset. */ |
b46acd6a KK |
1211 | if (read_log_page(log, vbo, (struct RECORD_PAGE_HDR **)&r_page, |
1212 | &usa_error)) { | |
e8b8e97f | 1213 | /* Ignore any errors. */ |
b46acd6a KK |
1214 | continue; |
1215 | } | |
1216 | ||
e8b8e97f | 1217 | /* Exit if the signature is a log record page. */ |
b46acd6a KK |
1218 | if (r_page->rhdr.sign == NTFS_RCRD_SIGNATURE) { |
1219 | info->initialized = true; | |
1220 | break; | |
1221 | } | |
1222 | ||
1223 | brst = r_page->rhdr.sign == NTFS_RSTR_SIGNATURE; | |
1224 | bchk = r_page->rhdr.sign == NTFS_CHKD_SIGNATURE; | |
1225 | ||
1226 | if (!bchk && !brst) { | |
1227 | if (r_page->rhdr.sign != NTFS_FFFF_SIGNATURE) { | |
1228 | /* | |
1229 | * Remember if the signature does not | |
e8b8e97f | 1230 | * indicate uninitialized file. |
b46acd6a KK |
1231 | */ |
1232 | info->initialized = true; | |
1233 | } | |
1234 | continue; | |
1235 | } | |
1236 | ||
1237 | ra = NULL; | |
1238 | info->valid_page = false; | |
1239 | info->initialized = true; | |
1240 | info->vbo = vbo; | |
1241 | ||
e8b8e97f | 1242 | /* Let's check the restart area if this is a valid page. */ |
b46acd6a KK |
1243 | if (!is_rst_page_hdr_valid(vbo, r_page)) |
1244 | goto check_result; | |
1245 | ra = Add2Ptr(r_page, le16_to_cpu(r_page->ra_off)); | |
1246 | ||
1247 | if (!is_rst_area_valid(r_page)) | |
1248 | goto check_result; | |
1249 | ||
1250 | /* | |
1251 | * We have a valid restart page header and restart area. | |
1252 | * If chkdsk was run or we have no clients then we have | |
e8b8e97f | 1253 | * no more checking to do. |
b46acd6a KK |
1254 | */ |
1255 | if (bchk || ra->client_idx[1] == LFS_NO_CLIENT_LE) { | |
1256 | info->valid_page = true; | |
1257 | goto check_result; | |
1258 | } | |
1259 | ||
e8b8e97f | 1260 | /* Read the entire restart area. */ |
b46acd6a KK |
1261 | sys_page_size = le32_to_cpu(r_page->sys_page_size); |
1262 | if (DefaultLogPageSize != sys_page_size) { | |
195c52bd KA |
1263 | kfree(r_page); |
1264 | r_page = kzalloc(sys_page_size, GFP_NOFS); | |
b46acd6a KK |
1265 | if (!r_page) |
1266 | return -ENOMEM; | |
1267 | ||
1268 | if (read_log_page(log, vbo, | |
1269 | (struct RECORD_PAGE_HDR **)&r_page, | |
1270 | &usa_error)) { | |
e8b8e97f | 1271 | /* Ignore any errors. */ |
195c52bd | 1272 | kfree(r_page); |
b46acd6a KK |
1273 | r_page = NULL; |
1274 | continue; | |
1275 | } | |
1276 | } | |
1277 | ||
1278 | if (is_client_area_valid(r_page, usa_error)) { | |
1279 | info->valid_page = true; | |
1280 | ra = Add2Ptr(r_page, le16_to_cpu(r_page->ra_off)); | |
1281 | } | |
1282 | ||
1283 | check_result: | |
e8b8e97f KA |
1284 | /* |
1285 | * If chkdsk was run then update the caller's | |
1286 | * values and return. | |
1287 | */ | |
b46acd6a KK |
1288 | if (r_page->rhdr.sign == NTFS_CHKD_SIGNATURE) { |
1289 | info->chkdsk_was_run = true; | |
1290 | info->last_lsn = le64_to_cpu(r_page->rhdr.lsn); | |
1291 | info->restart = true; | |
1292 | info->r_page = r_page; | |
1293 | return 0; | |
1294 | } | |
1295 | ||
e8b8e97f KA |
1296 | /* |
1297 | * If we have a valid page then copy the values | |
1298 | * we need from it. | |
1299 | */ | |
b46acd6a KK |
1300 | if (info->valid_page) { |
1301 | info->last_lsn = le64_to_cpu(ra->current_lsn); | |
1302 | info->restart = true; | |
1303 | info->r_page = r_page; | |
1304 | return 0; | |
1305 | } | |
1306 | } | |
1307 | ||
195c52bd | 1308 | kfree(r_page); |
b46acd6a KK |
1309 | |
1310 | return 0; | |
1311 | } | |
1312 | ||
1313 | /* | |
e8b8e97f | 1314 | * Ilog_init_pg_hdr - Init @log from restart page header. |
b46acd6a KK |
1315 | */ |
1316 | static void log_init_pg_hdr(struct ntfs_log *log, u32 sys_page_size, | |
1317 | u32 page_size, u16 major_ver, u16 minor_ver) | |
1318 | { | |
1319 | log->sys_page_size = sys_page_size; | |
1320 | log->sys_page_mask = sys_page_size - 1; | |
1321 | log->page_size = page_size; | |
1322 | log->page_mask = page_size - 1; | |
1323 | log->page_bits = blksize_bits(page_size); | |
1324 | ||
1325 | log->clst_per_page = log->page_size >> log->ni->mi.sbi->cluster_bits; | |
1326 | if (!log->clst_per_page) | |
1327 | log->clst_per_page = 1; | |
1328 | ||
1329 | log->first_page = major_ver >= 2 | |
1330 | ? 0x22 * page_size | |
1331 | : ((sys_page_size << 1) + (page_size << 1)); | |
1332 | log->major_ver = major_ver; | |
1333 | log->minor_ver = minor_ver; | |
1334 | } | |
1335 | ||
1336 | /* | |
e8b8e97f | 1337 | * log_create - Init @log in cases when we don't have a restart area to use. |
b46acd6a KK |
1338 | */ |
1339 | static void log_create(struct ntfs_log *log, u32 l_size, const u64 last_lsn, | |
1340 | u32 open_log_count, bool wrapped, bool use_multi_page) | |
1341 | { | |
1342 | log->l_size = l_size; | |
e8b8e97f | 1343 | /* All file offsets must be quadword aligned. */ |
b46acd6a KK |
1344 | log->file_data_bits = blksize_bits(l_size) - 3; |
1345 | log->seq_num_mask = (8 << log->file_data_bits) - 1; | |
1346 | log->seq_num_bits = sizeof(u64) * 8 - log->file_data_bits; | |
1347 | log->seq_num = (last_lsn >> log->file_data_bits) + 2; | |
1348 | log->next_page = log->first_page; | |
1349 | log->oldest_lsn = log->seq_num << log->file_data_bits; | |
1350 | log->oldest_lsn_off = 0; | |
1351 | log->last_lsn = log->oldest_lsn; | |
1352 | ||
1353 | log->l_flags |= NTFSLOG_NO_LAST_LSN | NTFSLOG_NO_OLDEST_LSN; | |
1354 | ||
e8b8e97f | 1355 | /* Set the correct flags for the I/O and indicate if we have wrapped. */ |
b46acd6a KK |
1356 | if (wrapped) |
1357 | log->l_flags |= NTFSLOG_WRAPPED; | |
1358 | ||
1359 | if (use_multi_page) | |
1360 | log->l_flags |= NTFSLOG_MULTIPLE_PAGE_IO; | |
1361 | ||
e8b8e97f | 1362 | /* Compute the log page values. */ |
fa3cacf5 | 1363 | log->data_off = ALIGN( |
b46acd6a | 1364 | offsetof(struct RECORD_PAGE_HDR, fixups) + |
fa3cacf5 | 1365 | sizeof(short) * ((log->page_size >> SECTOR_SHIFT) + 1), 8); |
b46acd6a KK |
1366 | log->data_size = log->page_size - log->data_off; |
1367 | log->record_header_len = sizeof(struct LFS_RECORD_HDR); | |
1368 | ||
e8b8e97f | 1369 | /* Remember the different page sizes for reservation. */ |
b46acd6a KK |
1370 | log->reserved = log->data_size - log->record_header_len; |
1371 | ||
1372 | /* Compute the restart page values. */ | |
fa3cacf5 | 1373 | log->ra_off = ALIGN( |
b46acd6a | 1374 | offsetof(struct RESTART_HDR, fixups) + |
fa3cacf5 | 1375 | sizeof(short) * ((log->sys_page_size >> SECTOR_SHIFT) + 1), 8); |
b46acd6a KK |
1376 | log->restart_size = log->sys_page_size - log->ra_off; |
1377 | log->ra_size = struct_size(log->ra, clients, 1); | |
1378 | log->current_openlog_count = open_log_count; | |
1379 | ||
1380 | /* | |
1381 | * The total available log file space is the number of | |
e8b8e97f | 1382 | * log file pages times the space available on each page. |
b46acd6a KK |
1383 | */ |
1384 | log->total_avail_pages = log->l_size - log->first_page; | |
1385 | log->total_avail = log->total_avail_pages >> log->page_bits; | |
1386 | ||
1387 | /* | |
1388 | * We assume that we can't use the end of the page less than | |
e8b8e97f KA |
1389 | * the file record size. |
1390 | * Then we won't need to reserve more than the caller asks for. | |
b46acd6a KK |
1391 | */ |
1392 | log->max_current_avail = log->total_avail * log->reserved; | |
1393 | log->total_avail = log->total_avail * log->data_size; | |
1394 | log->current_avail = log->max_current_avail; | |
1395 | } | |
1396 | ||
1397 | /* | |
e8b8e97f | 1398 | * log_create_ra - Fill a restart area from the values stored in @log. |
b46acd6a KK |
1399 | */ |
1400 | static struct RESTART_AREA *log_create_ra(struct ntfs_log *log) | |
1401 | { | |
1402 | struct CLIENT_REC *cr; | |
195c52bd | 1403 | struct RESTART_AREA *ra = kzalloc(log->restart_size, GFP_NOFS); |
b46acd6a KK |
1404 | |
1405 | if (!ra) | |
1406 | return NULL; | |
1407 | ||
1408 | ra->current_lsn = cpu_to_le64(log->last_lsn); | |
1409 | ra->log_clients = cpu_to_le16(1); | |
1410 | ra->client_idx[1] = LFS_NO_CLIENT_LE; | |
1411 | if (log->l_flags & NTFSLOG_MULTIPLE_PAGE_IO) | |
1412 | ra->flags = RESTART_SINGLE_PAGE_IO; | |
1413 | ra->seq_num_bits = cpu_to_le32(log->seq_num_bits); | |
1414 | ra->ra_len = cpu_to_le16(log->ra_size); | |
1415 | ra->client_off = cpu_to_le16(offsetof(struct RESTART_AREA, clients)); | |
1416 | ra->l_size = cpu_to_le64(log->l_size); | |
1417 | ra->rec_hdr_len = cpu_to_le16(log->record_header_len); | |
1418 | ra->data_off = cpu_to_le16(log->data_off); | |
1419 | ra->open_log_count = cpu_to_le32(log->current_openlog_count + 1); | |
1420 | ||
1421 | cr = ra->clients; | |
1422 | ||
1423 | cr->prev_client = LFS_NO_CLIENT_LE; | |
1424 | cr->next_client = LFS_NO_CLIENT_LE; | |
1425 | ||
1426 | return ra; | |
1427 | } | |
1428 | ||
1429 | static u32 final_log_off(struct ntfs_log *log, u64 lsn, u32 data_len) | |
1430 | { | |
1431 | u32 base_vbo = lsn << 3; | |
1432 | u32 final_log_off = (base_vbo & log->seq_num_mask) & ~log->page_mask; | |
1433 | u32 page_off = base_vbo & log->page_mask; | |
1434 | u32 tail = log->page_size - page_off; | |
1435 | ||
1436 | page_off -= 1; | |
1437 | ||
e8b8e97f | 1438 | /* Add the length of the header. */ |
b46acd6a KK |
1439 | data_len += log->record_header_len; |
1440 | ||
1441 | /* | |
e8b8e97f KA |
1442 | * If this lsn is contained this log page we are done. |
1443 | * Otherwise we need to walk through several log pages. | |
b46acd6a KK |
1444 | */ |
1445 | if (data_len > tail) { | |
1446 | data_len -= tail; | |
1447 | tail = log->data_size; | |
1448 | page_off = log->data_off - 1; | |
1449 | ||
1450 | for (;;) { | |
1451 | final_log_off = next_page_off(log, final_log_off); | |
1452 | ||
e8b8e97f KA |
1453 | /* |
1454 | * We are done if the remaining bytes | |
1455 | * fit on this page. | |
1456 | */ | |
b46acd6a KK |
1457 | if (data_len <= tail) |
1458 | break; | |
1459 | data_len -= tail; | |
1460 | } | |
1461 | } | |
1462 | ||
1463 | /* | |
1464 | * We add the remaining bytes to our starting position on this page | |
e8b8e97f | 1465 | * and then add that value to the file offset of this log page. |
b46acd6a KK |
1466 | */ |
1467 | return final_log_off + data_len + page_off; | |
1468 | } | |
1469 | ||
1470 | static int next_log_lsn(struct ntfs_log *log, const struct LFS_RECORD_HDR *rh, | |
1471 | u64 *lsn) | |
1472 | { | |
1473 | int err; | |
1474 | u64 this_lsn = le64_to_cpu(rh->this_lsn); | |
1475 | u32 vbo = lsn_to_vbo(log, this_lsn); | |
1476 | u32 end = | |
1477 | final_log_off(log, this_lsn, le32_to_cpu(rh->client_data_len)); | |
1478 | u32 hdr_off = end & ~log->sys_page_mask; | |
1479 | u64 seq = this_lsn >> log->file_data_bits; | |
1480 | struct RECORD_PAGE_HDR *page = NULL; | |
1481 | ||
e8b8e97f | 1482 | /* Remember if we wrapped. */ |
b46acd6a KK |
1483 | if (end <= vbo) |
1484 | seq += 1; | |
1485 | ||
e8b8e97f | 1486 | /* Log page header for this page. */ |
b46acd6a KK |
1487 | err = read_log_page(log, hdr_off, &page, NULL); |
1488 | if (err) | |
1489 | return err; | |
1490 | ||
1491 | /* | |
1492 | * If the lsn we were given was not the last lsn on this page, | |
1493 | * then the starting offset for the next lsn is on a quad word | |
e8b8e97f KA |
1494 | * boundary following the last file offset for the current lsn. |
1495 | * Otherwise the file offset is the start of the data on the next page. | |
b46acd6a KK |
1496 | */ |
1497 | if (this_lsn == le64_to_cpu(page->rhdr.lsn)) { | |
e8b8e97f | 1498 | /* If we wrapped, we need to increment the sequence number. */ |
b46acd6a KK |
1499 | hdr_off = next_page_off(log, hdr_off); |
1500 | if (hdr_off == log->first_page) | |
1501 | seq += 1; | |
1502 | ||
1503 | vbo = hdr_off + log->data_off; | |
1504 | } else { | |
fa3cacf5 | 1505 | vbo = ALIGN(end, 8); |
b46acd6a KK |
1506 | } |
1507 | ||
e8b8e97f | 1508 | /* Compute the lsn based on the file offset and the sequence count. */ |
b46acd6a KK |
1509 | *lsn = vbo_to_lsn(log, vbo, seq); |
1510 | ||
1511 | /* | |
e8b8e97f KA |
1512 | * If this lsn is within the legal range for the file, we return true. |
1513 | * Otherwise false indicates that there are no more lsn's. | |
b46acd6a KK |
1514 | */ |
1515 | if (!is_lsn_in_file(log, *lsn)) | |
1516 | *lsn = 0; | |
1517 | ||
195c52bd | 1518 | kfree(page); |
b46acd6a KK |
1519 | |
1520 | return 0; | |
1521 | } | |
1522 | ||
1523 | /* | |
e8b8e97f | 1524 | * current_log_avail - Calculate the number of bytes available for log records. |
b46acd6a KK |
1525 | */ |
1526 | static u32 current_log_avail(struct ntfs_log *log) | |
1527 | { | |
1528 | u32 oldest_off, next_free_off, free_bytes; | |
1529 | ||
1530 | if (log->l_flags & NTFSLOG_NO_LAST_LSN) { | |
e8b8e97f | 1531 | /* The entire file is available. */ |
b46acd6a KK |
1532 | return log->max_current_avail; |
1533 | } | |
1534 | ||
1535 | /* | |
1536 | * If there is a last lsn the restart area then we know that we will | |
e8b8e97f KA |
1537 | * have to compute the free range. |
1538 | * If there is no oldest lsn then start at the first page of the file. | |
b46acd6a KK |
1539 | */ |
1540 | oldest_off = (log->l_flags & NTFSLOG_NO_OLDEST_LSN) | |
1541 | ? log->first_page | |
1542 | : (log->oldest_lsn_off & ~log->sys_page_mask); | |
1543 | ||
1544 | /* | |
e8b8e97f KA |
1545 | * We will use the next log page offset to compute the next free page. |
1546 | * If we are going to reuse this page go to the next page. | |
1547 | * If we are at the first page then use the end of the file. | |
b46acd6a KK |
1548 | */ |
1549 | next_free_off = (log->l_flags & NTFSLOG_REUSE_TAIL) | |
1550 | ? log->next_page + log->page_size | |
1551 | : log->next_page == log->first_page | |
1552 | ? log->l_size | |
1553 | : log->next_page; | |
1554 | ||
e8b8e97f | 1555 | /* If the two offsets are the same then there is no available space. */ |
b46acd6a KK |
1556 | if (oldest_off == next_free_off) |
1557 | return 0; | |
1558 | /* | |
1559 | * If the free offset follows the oldest offset then subtract | |
e8b8e97f | 1560 | * this range from the total available pages. |
b46acd6a KK |
1561 | */ |
1562 | free_bytes = | |
1563 | oldest_off < next_free_off | |
1564 | ? log->total_avail_pages - (next_free_off - oldest_off) | |
1565 | : oldest_off - next_free_off; | |
1566 | ||
1567 | free_bytes >>= log->page_bits; | |
1568 | return free_bytes * log->reserved; | |
1569 | } | |
1570 | ||
1571 | static bool check_subseq_log_page(struct ntfs_log *log, | |
1572 | const struct RECORD_PAGE_HDR *rp, u32 vbo, | |
1573 | u64 seq) | |
1574 | { | |
1575 | u64 lsn_seq; | |
1576 | const struct NTFS_RECORD_HEADER *rhdr = &rp->rhdr; | |
1577 | u64 lsn = le64_to_cpu(rhdr->lsn); | |
1578 | ||
1579 | if (rhdr->sign == NTFS_FFFF_SIGNATURE || !rhdr->sign) | |
1580 | return false; | |
1581 | ||
1582 | /* | |
1583 | * If the last lsn on the page occurs was written after the page | |
e8b8e97f | 1584 | * that caused the original error then we have a fatal error. |
b46acd6a KK |
1585 | */ |
1586 | lsn_seq = lsn >> log->file_data_bits; | |
1587 | ||
1588 | /* | |
1589 | * If the sequence number for the lsn the page is equal or greater | |
e8b8e97f | 1590 | * than lsn we expect, then this is a subsequent write. |
b46acd6a KK |
1591 | */ |
1592 | return lsn_seq >= seq || | |
1593 | (lsn_seq == seq - 1 && log->first_page == vbo && | |
1594 | vbo != (lsn_to_vbo(log, lsn) & ~log->page_mask)); | |
1595 | } | |
1596 | ||
1597 | /* | |
1598 | * last_log_lsn | |
1599 | * | |
e8b8e97f KA |
1600 | * Walks through the log pages for a file, searching for the |
1601 | * last log page written to the file. | |
b46acd6a KK |
1602 | */ |
1603 | static int last_log_lsn(struct ntfs_log *log) | |
1604 | { | |
1605 | int err; | |
1606 | bool usa_error = false; | |
1607 | bool replace_page = false; | |
1608 | bool reuse_page = log->l_flags & NTFSLOG_REUSE_TAIL; | |
1609 | bool wrapped_file, wrapped; | |
1610 | ||
1611 | u32 page_cnt = 1, page_pos = 1; | |
1612 | u32 page_off = 0, page_off1 = 0, saved_off = 0; | |
1613 | u32 final_off, second_off, final_off_prev = 0, second_off_prev = 0; | |
1614 | u32 first_file_off = 0, second_file_off = 0; | |
1615 | u32 part_io_count = 0; | |
1616 | u32 tails = 0; | |
1617 | u32 this_off, curpage_off, nextpage_off, remain_pages; | |
1618 | ||
1619 | u64 expected_seq, seq_base = 0, lsn_base = 0; | |
1620 | u64 best_lsn, best_lsn1, best_lsn2; | |
1621 | u64 lsn_cur, lsn1, lsn2; | |
1622 | u64 last_ok_lsn = reuse_page ? log->last_lsn : 0; | |
1623 | ||
1624 | u16 cur_pos, best_page_pos; | |
1625 | ||
1626 | struct RECORD_PAGE_HDR *page = NULL; | |
1627 | struct RECORD_PAGE_HDR *tst_page = NULL; | |
1628 | struct RECORD_PAGE_HDR *first_tail = NULL; | |
1629 | struct RECORD_PAGE_HDR *second_tail = NULL; | |
1630 | struct RECORD_PAGE_HDR *tail_page = NULL; | |
1631 | struct RECORD_PAGE_HDR *second_tail_prev = NULL; | |
1632 | struct RECORD_PAGE_HDR *first_tail_prev = NULL; | |
1633 | struct RECORD_PAGE_HDR *page_bufs = NULL; | |
1634 | struct RECORD_PAGE_HDR *best_page; | |
1635 | ||
1636 | if (log->major_ver >= 2) { | |
1637 | final_off = 0x02 * log->page_size; | |
1638 | second_off = 0x12 * log->page_size; | |
1639 | ||
1640 | // 0x10 == 0x12 - 0x2 | |
195c52bd | 1641 | page_bufs = kmalloc(log->page_size * 0x10, GFP_NOFS); |
b46acd6a KK |
1642 | if (!page_bufs) |
1643 | return -ENOMEM; | |
1644 | } else { | |
1645 | second_off = log->first_page - log->page_size; | |
1646 | final_off = second_off - log->page_size; | |
1647 | } | |
1648 | ||
1649 | next_tail: | |
e8b8e97f | 1650 | /* Read second tail page (at pos 3/0x12000). */ |
b46acd6a KK |
1651 | if (read_log_page(log, second_off, &second_tail, &usa_error) || |
1652 | usa_error || second_tail->rhdr.sign != NTFS_RCRD_SIGNATURE) { | |
195c52bd | 1653 | kfree(second_tail); |
b46acd6a KK |
1654 | second_tail = NULL; |
1655 | second_file_off = 0; | |
1656 | lsn2 = 0; | |
1657 | } else { | |
1658 | second_file_off = hdr_file_off(log, second_tail); | |
1659 | lsn2 = le64_to_cpu(second_tail->record_hdr.last_end_lsn); | |
1660 | } | |
1661 | ||
e8b8e97f | 1662 | /* Read first tail page (at pos 2/0x2000). */ |
b46acd6a KK |
1663 | if (read_log_page(log, final_off, &first_tail, &usa_error) || |
1664 | usa_error || first_tail->rhdr.sign != NTFS_RCRD_SIGNATURE) { | |
195c52bd | 1665 | kfree(first_tail); |
b46acd6a KK |
1666 | first_tail = NULL; |
1667 | first_file_off = 0; | |
1668 | lsn1 = 0; | |
1669 | } else { | |
1670 | first_file_off = hdr_file_off(log, first_tail); | |
1671 | lsn1 = le64_to_cpu(first_tail->record_hdr.last_end_lsn); | |
1672 | } | |
1673 | ||
1674 | if (log->major_ver < 2) { | |
1675 | int best_page; | |
1676 | ||
1677 | first_tail_prev = first_tail; | |
1678 | final_off_prev = first_file_off; | |
1679 | second_tail_prev = second_tail; | |
1680 | second_off_prev = second_file_off; | |
1681 | tails = 1; | |
1682 | ||
1683 | if (!first_tail && !second_tail) | |
1684 | goto tail_read; | |
1685 | ||
1686 | if (first_tail && second_tail) | |
1687 | best_page = lsn1 < lsn2 ? 1 : 0; | |
1688 | else if (first_tail) | |
1689 | best_page = 0; | |
1690 | else | |
1691 | best_page = 1; | |
1692 | ||
1693 | page_off = best_page ? second_file_off : first_file_off; | |
1694 | seq_base = (best_page ? lsn2 : lsn1) >> log->file_data_bits; | |
1695 | goto tail_read; | |
1696 | } | |
1697 | ||
1698 | best_lsn1 = first_tail ? base_lsn(log, first_tail, first_file_off) : 0; | |
1699 | best_lsn2 = | |
1700 | second_tail ? base_lsn(log, second_tail, second_file_off) : 0; | |
1701 | ||
1702 | if (first_tail && second_tail) { | |
1703 | if (best_lsn1 > best_lsn2) { | |
1704 | best_lsn = best_lsn1; | |
1705 | best_page = first_tail; | |
1706 | this_off = first_file_off; | |
1707 | } else { | |
1708 | best_lsn = best_lsn2; | |
1709 | best_page = second_tail; | |
1710 | this_off = second_file_off; | |
1711 | } | |
1712 | } else if (first_tail) { | |
1713 | best_lsn = best_lsn1; | |
1714 | best_page = first_tail; | |
1715 | this_off = first_file_off; | |
1716 | } else if (second_tail) { | |
1717 | best_lsn = best_lsn2; | |
1718 | best_page = second_tail; | |
1719 | this_off = second_file_off; | |
1720 | } else { | |
1721 | goto tail_read; | |
1722 | } | |
1723 | ||
1724 | best_page_pos = le16_to_cpu(best_page->page_pos); | |
1725 | ||
1726 | if (!tails) { | |
1727 | if (best_page_pos == page_pos) { | |
1728 | seq_base = best_lsn >> log->file_data_bits; | |
1729 | saved_off = page_off = le32_to_cpu(best_page->file_off); | |
1730 | lsn_base = best_lsn; | |
1731 | ||
1732 | memmove(page_bufs, best_page, log->page_size); | |
1733 | ||
1734 | page_cnt = le16_to_cpu(best_page->page_count); | |
1735 | if (page_cnt > 1) | |
1736 | page_pos += 1; | |
1737 | ||
1738 | tails = 1; | |
1739 | } | |
1740 | } else if (seq_base == (best_lsn >> log->file_data_bits) && | |
1741 | saved_off + log->page_size == this_off && | |
1742 | lsn_base < best_lsn && | |
1743 | (page_pos != page_cnt || best_page_pos == page_pos || | |
1744 | best_page_pos == 1) && | |
1745 | (page_pos >= page_cnt || best_page_pos == page_pos)) { | |
1746 | u16 bppc = le16_to_cpu(best_page->page_count); | |
1747 | ||
1748 | saved_off += log->page_size; | |
1749 | lsn_base = best_lsn; | |
1750 | ||
1751 | memmove(Add2Ptr(page_bufs, tails * log->page_size), best_page, | |
1752 | log->page_size); | |
1753 | ||
1754 | tails += 1; | |
1755 | ||
1756 | if (best_page_pos != bppc) { | |
1757 | page_cnt = bppc; | |
1758 | page_pos = best_page_pos; | |
1759 | ||
1760 | if (page_cnt > 1) | |
1761 | page_pos += 1; | |
1762 | } else { | |
1763 | page_pos = page_cnt = 1; | |
1764 | } | |
1765 | } else { | |
195c52bd KA |
1766 | kfree(first_tail); |
1767 | kfree(second_tail); | |
b46acd6a KK |
1768 | goto tail_read; |
1769 | } | |
1770 | ||
195c52bd | 1771 | kfree(first_tail_prev); |
b46acd6a KK |
1772 | first_tail_prev = first_tail; |
1773 | final_off_prev = first_file_off; | |
1774 | first_tail = NULL; | |
1775 | ||
195c52bd | 1776 | kfree(second_tail_prev); |
b46acd6a KK |
1777 | second_tail_prev = second_tail; |
1778 | second_off_prev = second_file_off; | |
1779 | second_tail = NULL; | |
1780 | ||
1781 | final_off += log->page_size; | |
1782 | second_off += log->page_size; | |
1783 | ||
1784 | if (tails < 0x10) | |
1785 | goto next_tail; | |
1786 | tail_read: | |
1787 | first_tail = first_tail_prev; | |
1788 | final_off = final_off_prev; | |
1789 | ||
1790 | second_tail = second_tail_prev; | |
1791 | second_off = second_off_prev; | |
1792 | ||
1793 | page_cnt = page_pos = 1; | |
1794 | ||
1795 | curpage_off = seq_base == log->seq_num ? min(log->next_page, page_off) | |
1796 | : log->next_page; | |
1797 | ||
1798 | wrapped_file = | |
1799 | curpage_off == log->first_page && | |
1800 | !(log->l_flags & (NTFSLOG_NO_LAST_LSN | NTFSLOG_REUSE_TAIL)); | |
1801 | ||
1802 | expected_seq = wrapped_file ? (log->seq_num + 1) : log->seq_num; | |
1803 | ||
1804 | nextpage_off = curpage_off; | |
1805 | ||
1806 | next_page: | |
1807 | tail_page = NULL; | |
e8b8e97f | 1808 | /* Read the next log page. */ |
b46acd6a KK |
1809 | err = read_log_page(log, curpage_off, &page, &usa_error); |
1810 | ||
e8b8e97f | 1811 | /* Compute the next log page offset the file. */ |
b46acd6a KK |
1812 | nextpage_off = next_page_off(log, curpage_off); |
1813 | wrapped = nextpage_off == log->first_page; | |
1814 | ||
1815 | if (tails > 1) { | |
1816 | struct RECORD_PAGE_HDR *cur_page = | |
1817 | Add2Ptr(page_bufs, curpage_off - page_off); | |
1818 | ||
1819 | if (curpage_off == saved_off) { | |
1820 | tail_page = cur_page; | |
1821 | goto use_tail_page; | |
1822 | } | |
1823 | ||
1824 | if (page_off > curpage_off || curpage_off >= saved_off) | |
1825 | goto use_tail_page; | |
1826 | ||
1827 | if (page_off1) | |
1828 | goto use_cur_page; | |
1829 | ||
1830 | if (!err && !usa_error && | |
1831 | page->rhdr.sign == NTFS_RCRD_SIGNATURE && | |
1832 | cur_page->rhdr.lsn == page->rhdr.lsn && | |
1833 | cur_page->record_hdr.next_record_off == | |
1834 | page->record_hdr.next_record_off && | |
1835 | ((page_pos == page_cnt && | |
1836 | le16_to_cpu(page->page_pos) == 1) || | |
1837 | (page_pos != page_cnt && | |
1838 | le16_to_cpu(page->page_pos) == page_pos + 1 && | |
1839 | le16_to_cpu(page->page_count) == page_cnt))) { | |
1840 | cur_page = NULL; | |
1841 | goto use_tail_page; | |
1842 | } | |
1843 | ||
1844 | page_off1 = page_off; | |
1845 | ||
1846 | use_cur_page: | |
1847 | ||
1848 | lsn_cur = le64_to_cpu(cur_page->rhdr.lsn); | |
1849 | ||
1850 | if (last_ok_lsn != | |
1851 | le64_to_cpu(cur_page->record_hdr.last_end_lsn) && | |
1852 | ((lsn_cur >> log->file_data_bits) + | |
1853 | ((curpage_off < | |
1854 | (lsn_to_vbo(log, lsn_cur) & ~log->page_mask)) | |
1855 | ? 1 | |
1856 | : 0)) != expected_seq) { | |
1857 | goto check_tail; | |
1858 | } | |
1859 | ||
1860 | if (!is_log_record_end(cur_page)) { | |
1861 | tail_page = NULL; | |
1862 | last_ok_lsn = lsn_cur; | |
1863 | goto next_page_1; | |
1864 | } | |
1865 | ||
1866 | log->seq_num = expected_seq; | |
1867 | log->l_flags &= ~NTFSLOG_NO_LAST_LSN; | |
1868 | log->last_lsn = le64_to_cpu(cur_page->record_hdr.last_end_lsn); | |
1869 | log->ra->current_lsn = cur_page->record_hdr.last_end_lsn; | |
1870 | ||
1871 | if (log->record_header_len <= | |
1872 | log->page_size - | |
1873 | le16_to_cpu(cur_page->record_hdr.next_record_off)) { | |
1874 | log->l_flags |= NTFSLOG_REUSE_TAIL; | |
1875 | log->next_page = curpage_off; | |
1876 | } else { | |
1877 | log->l_flags &= ~NTFSLOG_REUSE_TAIL; | |
1878 | log->next_page = nextpage_off; | |
1879 | } | |
1880 | ||
1881 | if (wrapped_file) | |
1882 | log->l_flags |= NTFSLOG_WRAPPED; | |
1883 | ||
1884 | last_ok_lsn = le64_to_cpu(cur_page->record_hdr.last_end_lsn); | |
1885 | goto next_page_1; | |
1886 | } | |
1887 | ||
1888 | /* | |
1889 | * If we are at the expected first page of a transfer check to see | |
e8b8e97f | 1890 | * if either tail copy is at this offset. |
b46acd6a | 1891 | * If this page is the last page of a transfer, check if we wrote |
e8b8e97f | 1892 | * a subsequent tail copy. |
b46acd6a KK |
1893 | */ |
1894 | if (page_cnt == page_pos || page_cnt == page_pos + 1) { | |
1895 | /* | |
1896 | * Check if the offset matches either the first or second | |
e8b8e97f | 1897 | * tail copy. It is possible it will match both. |
b46acd6a KK |
1898 | */ |
1899 | if (curpage_off == final_off) | |
1900 | tail_page = first_tail; | |
1901 | ||
1902 | /* | |
1903 | * If we already matched on the first page then | |
1904 | * check the ending lsn's. | |
1905 | */ | |
1906 | if (curpage_off == second_off) { | |
1907 | if (!tail_page || | |
1908 | (second_tail && | |
1909 | le64_to_cpu(second_tail->record_hdr.last_end_lsn) > | |
1910 | le64_to_cpu(first_tail->record_hdr | |
1911 | .last_end_lsn))) { | |
1912 | tail_page = second_tail; | |
1913 | } | |
1914 | } | |
1915 | } | |
1916 | ||
1917 | use_tail_page: | |
1918 | if (tail_page) { | |
e8b8e97f | 1919 | /* We have a candidate for a tail copy. */ |
b46acd6a KK |
1920 | lsn_cur = le64_to_cpu(tail_page->record_hdr.last_end_lsn); |
1921 | ||
1922 | if (last_ok_lsn < lsn_cur) { | |
1923 | /* | |
1924 | * If the sequence number is not expected, | |
e8b8e97f | 1925 | * then don't use the tail copy. |
b46acd6a KK |
1926 | */ |
1927 | if (expected_seq != (lsn_cur >> log->file_data_bits)) | |
1928 | tail_page = NULL; | |
1929 | } else if (last_ok_lsn > lsn_cur) { | |
1930 | /* | |
1931 | * If the last lsn is greater than the one on | |
e8b8e97f | 1932 | * this page then forget this tail. |
b46acd6a KK |
1933 | */ |
1934 | tail_page = NULL; | |
1935 | } | |
1936 | } | |
1937 | ||
e8b8e97f KA |
1938 | /* |
1939 | *If we have an error on the current page, | |
1940 | * we will break of this loop. | |
1941 | */ | |
b46acd6a KK |
1942 | if (err || usa_error) |
1943 | goto check_tail; | |
1944 | ||
1945 | /* | |
1946 | * Done if the last lsn on this page doesn't match the previous known | |
e8b8e97f | 1947 | * last lsn or the sequence number is not expected. |
b46acd6a KK |
1948 | */ |
1949 | lsn_cur = le64_to_cpu(page->rhdr.lsn); | |
1950 | if (last_ok_lsn != lsn_cur && | |
1951 | expected_seq != (lsn_cur >> log->file_data_bits)) { | |
1952 | goto check_tail; | |
1953 | } | |
1954 | ||
1955 | /* | |
e8b8e97f | 1956 | * Check that the page position and page count values are correct. |
b46acd6a | 1957 | * If this is the first page of a transfer the position must be 1 |
e8b8e97f | 1958 | * and the count will be unknown. |
b46acd6a KK |
1959 | */ |
1960 | if (page_cnt == page_pos) { | |
1961 | if (page->page_pos != cpu_to_le16(1) && | |
1962 | (!reuse_page || page->page_pos != page->page_count)) { | |
1963 | /* | |
1964 | * If the current page is the first page we are | |
1965 | * looking at and we are reusing this page then | |
1966 | * it can be either the first or last page of a | |
1967 | * transfer. Otherwise it can only be the first. | |
1968 | */ | |
1969 | goto check_tail; | |
1970 | } | |
1971 | } else if (le16_to_cpu(page->page_count) != page_cnt || | |
1972 | le16_to_cpu(page->page_pos) != page_pos + 1) { | |
1973 | /* | |
1974 | * The page position better be 1 more than the last page | |
e8b8e97f | 1975 | * position and the page count better match. |
b46acd6a KK |
1976 | */ |
1977 | goto check_tail; | |
1978 | } | |
1979 | ||
1980 | /* | |
1981 | * We have a valid page the file and may have a valid page | |
e8b8e97f | 1982 | * the tail copy area. |
b46acd6a | 1983 | * If the tail page was written after the page the file then |
e8b8e97f | 1984 | * break of the loop. |
b46acd6a KK |
1985 | */ |
1986 | if (tail_page && | |
1987 | le64_to_cpu(tail_page->record_hdr.last_end_lsn) > lsn_cur) { | |
e8b8e97f | 1988 | /* Remember if we will replace the page. */ |
b46acd6a KK |
1989 | replace_page = true; |
1990 | goto check_tail; | |
1991 | } | |
1992 | ||
1993 | tail_page = NULL; | |
1994 | ||
1995 | if (is_log_record_end(page)) { | |
1996 | /* | |
1997 | * Since we have read this page we know the sequence number | |
e8b8e97f | 1998 | * is the same as our expected value. |
b46acd6a KK |
1999 | */ |
2000 | log->seq_num = expected_seq; | |
2001 | log->last_lsn = le64_to_cpu(page->record_hdr.last_end_lsn); | |
2002 | log->ra->current_lsn = page->record_hdr.last_end_lsn; | |
2003 | log->l_flags &= ~NTFSLOG_NO_LAST_LSN; | |
2004 | ||
2005 | /* | |
2006 | * If there is room on this page for another header then | |
e8b8e97f | 2007 | * remember we want to reuse the page. |
b46acd6a KK |
2008 | */ |
2009 | if (log->record_header_len <= | |
2010 | log->page_size - | |
2011 | le16_to_cpu(page->record_hdr.next_record_off)) { | |
2012 | log->l_flags |= NTFSLOG_REUSE_TAIL; | |
2013 | log->next_page = curpage_off; | |
2014 | } else { | |
2015 | log->l_flags &= ~NTFSLOG_REUSE_TAIL; | |
2016 | log->next_page = nextpage_off; | |
2017 | } | |
2018 | ||
e8b8e97f | 2019 | /* Remember if we wrapped the log file. */ |
b46acd6a KK |
2020 | if (wrapped_file) |
2021 | log->l_flags |= NTFSLOG_WRAPPED; | |
2022 | } | |
2023 | ||
2024 | /* | |
2025 | * Remember the last page count and position. | |
e8b8e97f | 2026 | * Also remember the last known lsn. |
b46acd6a KK |
2027 | */ |
2028 | page_cnt = le16_to_cpu(page->page_count); | |
2029 | page_pos = le16_to_cpu(page->page_pos); | |
2030 | last_ok_lsn = le64_to_cpu(page->rhdr.lsn); | |
2031 | ||
2032 | next_page_1: | |
2033 | ||
2034 | if (wrapped) { | |
2035 | expected_seq += 1; | |
2036 | wrapped_file = 1; | |
2037 | } | |
2038 | ||
2039 | curpage_off = nextpage_off; | |
195c52bd | 2040 | kfree(page); |
b46acd6a KK |
2041 | page = NULL; |
2042 | reuse_page = 0; | |
2043 | goto next_page; | |
2044 | ||
2045 | check_tail: | |
2046 | if (tail_page) { | |
2047 | log->seq_num = expected_seq; | |
2048 | log->last_lsn = le64_to_cpu(tail_page->record_hdr.last_end_lsn); | |
2049 | log->ra->current_lsn = tail_page->record_hdr.last_end_lsn; | |
2050 | log->l_flags &= ~NTFSLOG_NO_LAST_LSN; | |
2051 | ||
2052 | if (log->page_size - | |
2053 | le16_to_cpu( | |
2054 | tail_page->record_hdr.next_record_off) >= | |
2055 | log->record_header_len) { | |
2056 | log->l_flags |= NTFSLOG_REUSE_TAIL; | |
2057 | log->next_page = curpage_off; | |
2058 | } else { | |
2059 | log->l_flags &= ~NTFSLOG_REUSE_TAIL; | |
2060 | log->next_page = nextpage_off; | |
2061 | } | |
2062 | ||
2063 | if (wrapped) | |
2064 | log->l_flags |= NTFSLOG_WRAPPED; | |
2065 | } | |
2066 | ||
e8b8e97f | 2067 | /* Remember that the partial IO will start at the next page. */ |
b46acd6a KK |
2068 | second_off = nextpage_off; |
2069 | ||
2070 | /* | |
2071 | * If the next page is the first page of the file then update | |
e8b8e97f | 2072 | * the sequence number for log records which begon the next page. |
b46acd6a KK |
2073 | */ |
2074 | if (wrapped) | |
2075 | expected_seq += 1; | |
2076 | ||
2077 | /* | |
2078 | * If we have a tail copy or are performing single page I/O we can | |
e8b8e97f | 2079 | * immediately look at the next page. |
b46acd6a KK |
2080 | */ |
2081 | if (replace_page || (log->ra->flags & RESTART_SINGLE_PAGE_IO)) { | |
2082 | page_cnt = 2; | |
2083 | page_pos = 1; | |
2084 | goto check_valid; | |
2085 | } | |
2086 | ||
2087 | if (page_pos != page_cnt) | |
2088 | goto check_valid; | |
2089 | /* | |
2090 | * If the next page causes us to wrap to the beginning of the log | |
2091 | * file then we know which page to check next. | |
2092 | */ | |
2093 | if (wrapped) { | |
2094 | page_cnt = 2; | |
2095 | page_pos = 1; | |
2096 | goto check_valid; | |
2097 | } | |
2098 | ||
2099 | cur_pos = 2; | |
2100 | ||
2101 | next_test_page: | |
195c52bd | 2102 | kfree(tst_page); |
b46acd6a KK |
2103 | tst_page = NULL; |
2104 | ||
e8b8e97f | 2105 | /* Walk through the file, reading log pages. */ |
b46acd6a KK |
2106 | err = read_log_page(log, nextpage_off, &tst_page, &usa_error); |
2107 | ||
2108 | /* | |
2109 | * If we get a USA error then assume that we correctly found | |
e8b8e97f | 2110 | * the end of the original transfer. |
b46acd6a KK |
2111 | */ |
2112 | if (usa_error) | |
2113 | goto file_is_valid; | |
2114 | ||
2115 | /* | |
2116 | * If we were able to read the page, we examine it to see if it | |
e8b8e97f | 2117 | * is the same or different Io block. |
b46acd6a KK |
2118 | */ |
2119 | if (err) | |
2120 | goto next_test_page_1; | |
2121 | ||
2122 | if (le16_to_cpu(tst_page->page_pos) == cur_pos && | |
2123 | check_subseq_log_page(log, tst_page, nextpage_off, expected_seq)) { | |
2124 | page_cnt = le16_to_cpu(tst_page->page_count) + 1; | |
2125 | page_pos = le16_to_cpu(tst_page->page_pos); | |
2126 | goto check_valid; | |
2127 | } else { | |
2128 | goto file_is_valid; | |
2129 | } | |
2130 | ||
2131 | next_test_page_1: | |
2132 | ||
2133 | nextpage_off = next_page_off(log, curpage_off); | |
2134 | wrapped = nextpage_off == log->first_page; | |
2135 | ||
2136 | if (wrapped) { | |
2137 | expected_seq += 1; | |
2138 | page_cnt = 2; | |
2139 | page_pos = 1; | |
2140 | } | |
2141 | ||
2142 | cur_pos += 1; | |
2143 | part_io_count += 1; | |
2144 | if (!wrapped) | |
2145 | goto next_test_page; | |
2146 | ||
2147 | check_valid: | |
e8b8e97f | 2148 | /* Skip over the remaining pages this transfer. */ |
b46acd6a KK |
2149 | remain_pages = page_cnt - page_pos - 1; |
2150 | part_io_count += remain_pages; | |
2151 | ||
2152 | while (remain_pages--) { | |
2153 | nextpage_off = next_page_off(log, curpage_off); | |
2154 | wrapped = nextpage_off == log->first_page; | |
2155 | ||
2156 | if (wrapped) | |
2157 | expected_seq += 1; | |
2158 | } | |
2159 | ||
e8b8e97f | 2160 | /* Call our routine to check this log page. */ |
195c52bd | 2161 | kfree(tst_page); |
b46acd6a KK |
2162 | tst_page = NULL; |
2163 | ||
2164 | err = read_log_page(log, nextpage_off, &tst_page, &usa_error); | |
2165 | if (!err && !usa_error && | |
2166 | check_subseq_log_page(log, tst_page, nextpage_off, expected_seq)) { | |
2167 | err = -EINVAL; | |
2168 | goto out; | |
2169 | } | |
2170 | ||
2171 | file_is_valid: | |
2172 | ||
e8b8e97f | 2173 | /* We have a valid file. */ |
b46acd6a KK |
2174 | if (page_off1 || tail_page) { |
2175 | struct RECORD_PAGE_HDR *tmp_page; | |
2176 | ||
2177 | if (sb_rdonly(log->ni->mi.sbi->sb)) { | |
2178 | err = -EROFS; | |
2179 | goto out; | |
2180 | } | |
2181 | ||
2182 | if (page_off1) { | |
2183 | tmp_page = Add2Ptr(page_bufs, page_off1 - page_off); | |
2184 | tails -= (page_off1 - page_off) / log->page_size; | |
2185 | if (!tail_page) | |
2186 | tails -= 1; | |
2187 | } else { | |
2188 | tmp_page = tail_page; | |
2189 | tails = 1; | |
2190 | } | |
2191 | ||
2192 | while (tails--) { | |
2193 | u64 off = hdr_file_off(log, tmp_page); | |
2194 | ||
2195 | if (!page) { | |
195c52bd | 2196 | page = kmalloc(log->page_size, GFP_NOFS); |
b46acd6a KK |
2197 | if (!page) |
2198 | return -ENOMEM; | |
2199 | } | |
2200 | ||
2201 | /* | |
2202 | * Correct page and copy the data from this page | |
e8b8e97f | 2203 | * into it and flush it to disk. |
b46acd6a KK |
2204 | */ |
2205 | memcpy(page, tmp_page, log->page_size); | |
2206 | ||
e8b8e97f | 2207 | /* Fill last flushed lsn value flush the page. */ |
b46acd6a KK |
2208 | if (log->major_ver < 2) |
2209 | page->rhdr.lsn = page->record_hdr.last_end_lsn; | |
2210 | else | |
2211 | page->file_off = 0; | |
2212 | ||
2213 | page->page_pos = page->page_count = cpu_to_le16(1); | |
2214 | ||
2215 | ntfs_fix_pre_write(&page->rhdr, log->page_size); | |
2216 | ||
2217 | err = ntfs_sb_write_run(log->ni->mi.sbi, | |
2218 | &log->ni->file.run, off, page, | |
2219 | log->page_size); | |
2220 | ||
2221 | if (err) | |
2222 | goto out; | |
2223 | ||
2224 | if (part_io_count && second_off == off) { | |
2225 | second_off += log->page_size; | |
2226 | part_io_count -= 1; | |
2227 | } | |
2228 | ||
2229 | tmp_page = Add2Ptr(tmp_page, log->page_size); | |
2230 | } | |
2231 | } | |
2232 | ||
2233 | if (part_io_count) { | |
2234 | if (sb_rdonly(log->ni->mi.sbi->sb)) { | |
2235 | err = -EROFS; | |
2236 | goto out; | |
2237 | } | |
2238 | } | |
2239 | ||
2240 | out: | |
195c52bd KA |
2241 | kfree(second_tail); |
2242 | kfree(first_tail); | |
2243 | kfree(page); | |
2244 | kfree(tst_page); | |
2245 | kfree(page_bufs); | |
b46acd6a KK |
2246 | |
2247 | return err; | |
2248 | } | |
2249 | ||
2250 | /* | |
e8b8e97f | 2251 | * read_log_rec_buf - Copy a log record from the file to a buffer. |
b46acd6a | 2252 | * |
e8b8e97f | 2253 | * The log record may span several log pages and may even wrap the file. |
b46acd6a KK |
2254 | */ |
2255 | static int read_log_rec_buf(struct ntfs_log *log, | |
2256 | const struct LFS_RECORD_HDR *rh, void *buffer) | |
2257 | { | |
2258 | int err; | |
2259 | struct RECORD_PAGE_HDR *ph = NULL; | |
2260 | u64 lsn = le64_to_cpu(rh->this_lsn); | |
2261 | u32 vbo = lsn_to_vbo(log, lsn) & ~log->page_mask; | |
2262 | u32 off = lsn_to_page_off(log, lsn) + log->record_header_len; | |
2263 | u32 data_len = le32_to_cpu(rh->client_data_len); | |
2264 | ||
2265 | /* | |
2266 | * While there are more bytes to transfer, | |
e8b8e97f | 2267 | * we continue to attempt to perform the read. |
b46acd6a KK |
2268 | */ |
2269 | for (;;) { | |
2270 | bool usa_error; | |
2271 | u32 tail = log->page_size - off; | |
2272 | ||
2273 | if (tail >= data_len) | |
2274 | tail = data_len; | |
2275 | ||
2276 | data_len -= tail; | |
2277 | ||
2278 | err = read_log_page(log, vbo, &ph, &usa_error); | |
2279 | if (err) | |
2280 | goto out; | |
2281 | ||
2282 | /* | |
2283 | * The last lsn on this page better be greater or equal | |
e8b8e97f | 2284 | * to the lsn we are copying. |
b46acd6a KK |
2285 | */ |
2286 | if (lsn > le64_to_cpu(ph->rhdr.lsn)) { | |
2287 | err = -EINVAL; | |
2288 | goto out; | |
2289 | } | |
2290 | ||
2291 | memcpy(buffer, Add2Ptr(ph, off), tail); | |
2292 | ||
e8b8e97f | 2293 | /* If there are no more bytes to transfer, we exit the loop. */ |
b46acd6a KK |
2294 | if (!data_len) { |
2295 | if (!is_log_record_end(ph) || | |
2296 | lsn > le64_to_cpu(ph->record_hdr.last_end_lsn)) { | |
2297 | err = -EINVAL; | |
2298 | goto out; | |
2299 | } | |
2300 | break; | |
2301 | } | |
2302 | ||
2303 | if (ph->rhdr.lsn == ph->record_hdr.last_end_lsn || | |
2304 | lsn > le64_to_cpu(ph->rhdr.lsn)) { | |
2305 | err = -EINVAL; | |
2306 | goto out; | |
2307 | } | |
2308 | ||
2309 | vbo = next_page_off(log, vbo); | |
2310 | off = log->data_off; | |
2311 | ||
2312 | /* | |
e8b8e97f KA |
2313 | * Adjust our pointer the user's buffer to transfer |
2314 | * the next block to. | |
b46acd6a KK |
2315 | */ |
2316 | buffer = Add2Ptr(buffer, tail); | |
2317 | } | |
2318 | ||
2319 | out: | |
195c52bd | 2320 | kfree(ph); |
b46acd6a KK |
2321 | return err; |
2322 | } | |
2323 | ||
2324 | static int read_rst_area(struct ntfs_log *log, struct NTFS_RESTART **rst_, | |
2325 | u64 *lsn) | |
2326 | { | |
2327 | int err; | |
2328 | struct LFS_RECORD_HDR *rh = NULL; | |
2329 | const struct CLIENT_REC *cr = | |
2330 | Add2Ptr(log->ra, le16_to_cpu(log->ra->client_off)); | |
2331 | u64 lsnr, lsnc = le64_to_cpu(cr->restart_lsn); | |
2332 | u32 len; | |
2333 | struct NTFS_RESTART *rst; | |
2334 | ||
2335 | *lsn = 0; | |
2336 | *rst_ = NULL; | |
2337 | ||
e8b8e97f | 2338 | /* If the client doesn't have a restart area, go ahead and exit now. */ |
b46acd6a KK |
2339 | if (!lsnc) |
2340 | return 0; | |
2341 | ||
2342 | err = read_log_page(log, lsn_to_vbo(log, lsnc), | |
2343 | (struct RECORD_PAGE_HDR **)&rh, NULL); | |
2344 | if (err) | |
2345 | return err; | |
2346 | ||
2347 | rst = NULL; | |
2348 | lsnr = le64_to_cpu(rh->this_lsn); | |
2349 | ||
2350 | if (lsnc != lsnr) { | |
e8b8e97f | 2351 | /* If the lsn values don't match, then the disk is corrupt. */ |
b46acd6a KK |
2352 | err = -EINVAL; |
2353 | goto out; | |
2354 | } | |
2355 | ||
2356 | *lsn = lsnr; | |
2357 | len = le32_to_cpu(rh->client_data_len); | |
2358 | ||
2359 | if (!len) { | |
2360 | err = 0; | |
2361 | goto out; | |
2362 | } | |
2363 | ||
2364 | if (len < sizeof(struct NTFS_RESTART)) { | |
2365 | err = -EINVAL; | |
2366 | goto out; | |
2367 | } | |
2368 | ||
195c52bd | 2369 | rst = kmalloc(len, GFP_NOFS); |
b46acd6a KK |
2370 | if (!rst) { |
2371 | err = -ENOMEM; | |
2372 | goto out; | |
2373 | } | |
2374 | ||
e8b8e97f | 2375 | /* Copy the data into the 'rst' buffer. */ |
b46acd6a KK |
2376 | err = read_log_rec_buf(log, rh, rst); |
2377 | if (err) | |
2378 | goto out; | |
2379 | ||
2380 | *rst_ = rst; | |
2381 | rst = NULL; | |
2382 | ||
2383 | out: | |
195c52bd KA |
2384 | kfree(rh); |
2385 | kfree(rst); | |
b46acd6a KK |
2386 | |
2387 | return err; | |
2388 | } | |
2389 | ||
2390 | static int find_log_rec(struct ntfs_log *log, u64 lsn, struct lcb *lcb) | |
2391 | { | |
2392 | int err; | |
2393 | struct LFS_RECORD_HDR *rh = lcb->lrh; | |
2394 | u32 rec_len, len; | |
2395 | ||
e8b8e97f | 2396 | /* Read the record header for this lsn. */ |
b46acd6a KK |
2397 | if (!rh) { |
2398 | err = read_log_page(log, lsn_to_vbo(log, lsn), | |
2399 | (struct RECORD_PAGE_HDR **)&rh, NULL); | |
2400 | ||
2401 | lcb->lrh = rh; | |
2402 | if (err) | |
2403 | return err; | |
2404 | } | |
2405 | ||
2406 | /* | |
2407 | * If the lsn the log record doesn't match the desired | |
e8b8e97f | 2408 | * lsn then the disk is corrupt. |
b46acd6a KK |
2409 | */ |
2410 | if (lsn != le64_to_cpu(rh->this_lsn)) | |
2411 | return -EINVAL; | |
2412 | ||
2413 | len = le32_to_cpu(rh->client_data_len); | |
2414 | ||
2415 | /* | |
e8b8e97f KA |
2416 | * Check that the length field isn't greater than the total |
2417 | * available space the log file. | |
b46acd6a KK |
2418 | */ |
2419 | rec_len = len + log->record_header_len; | |
2420 | if (rec_len >= log->total_avail) | |
2421 | return -EINVAL; | |
2422 | ||
2423 | /* | |
2424 | * If the entire log record is on this log page, | |
e8b8e97f | 2425 | * put a pointer to the log record the context block. |
b46acd6a KK |
2426 | */ |
2427 | if (rh->flags & LOG_RECORD_MULTI_PAGE) { | |
195c52bd | 2428 | void *lr = kmalloc(len, GFP_NOFS); |
b46acd6a KK |
2429 | |
2430 | if (!lr) | |
2431 | return -ENOMEM; | |
2432 | ||
2433 | lcb->log_rec = lr; | |
2434 | lcb->alloc = true; | |
2435 | ||
e8b8e97f | 2436 | /* Copy the data into the buffer returned. */ |
b46acd6a KK |
2437 | err = read_log_rec_buf(log, rh, lr); |
2438 | if (err) | |
2439 | return err; | |
2440 | } else { | |
e8b8e97f | 2441 | /* If beyond the end of the current page -> an error. */ |
b46acd6a KK |
2442 | u32 page_off = lsn_to_page_off(log, lsn); |
2443 | ||
2444 | if (page_off + len + log->record_header_len > log->page_size) | |
2445 | return -EINVAL; | |
2446 | ||
2447 | lcb->log_rec = Add2Ptr(rh, sizeof(struct LFS_RECORD_HDR)); | |
2448 | lcb->alloc = false; | |
2449 | } | |
2450 | ||
2451 | return 0; | |
2452 | } | |
2453 | ||
2454 | /* | |
e8b8e97f | 2455 | * read_log_rec_lcb - Init the query operation. |
b46acd6a KK |
2456 | */ |
2457 | static int read_log_rec_lcb(struct ntfs_log *log, u64 lsn, u32 ctx_mode, | |
2458 | struct lcb **lcb_) | |
2459 | { | |
2460 | int err; | |
2461 | const struct CLIENT_REC *cr; | |
2462 | struct lcb *lcb; | |
2463 | ||
2464 | switch (ctx_mode) { | |
2465 | case lcb_ctx_undo_next: | |
2466 | case lcb_ctx_prev: | |
2467 | case lcb_ctx_next: | |
2468 | break; | |
2469 | default: | |
2470 | return -EINVAL; | |
2471 | } | |
2472 | ||
e8b8e97f | 2473 | /* Check that the given lsn is the legal range for this client. */ |
b46acd6a KK |
2474 | cr = Add2Ptr(log->ra, le16_to_cpu(log->ra->client_off)); |
2475 | ||
2476 | if (!verify_client_lsn(log, cr, lsn)) | |
2477 | return -EINVAL; | |
2478 | ||
195c52bd | 2479 | lcb = kzalloc(sizeof(struct lcb), GFP_NOFS); |
b46acd6a KK |
2480 | if (!lcb) |
2481 | return -ENOMEM; | |
2482 | lcb->client = log->client_id; | |
2483 | lcb->ctx_mode = ctx_mode; | |
2484 | ||
e8b8e97f | 2485 | /* Find the log record indicated by the given lsn. */ |
b46acd6a KK |
2486 | err = find_log_rec(log, lsn, lcb); |
2487 | if (err) | |
2488 | goto out; | |
2489 | ||
2490 | *lcb_ = lcb; | |
2491 | return 0; | |
2492 | ||
2493 | out: | |
2494 | lcb_put(lcb); | |
2495 | *lcb_ = NULL; | |
2496 | return err; | |
2497 | } | |
2498 | ||
2499 | /* | |
2500 | * find_client_next_lsn | |
2501 | * | |
e8b8e97f | 2502 | * Attempt to find the next lsn to return to a client based on the context mode. |
b46acd6a KK |
2503 | */ |
2504 | static int find_client_next_lsn(struct ntfs_log *log, struct lcb *lcb, u64 *lsn) | |
2505 | { | |
2506 | int err; | |
2507 | u64 next_lsn; | |
2508 | struct LFS_RECORD_HDR *hdr; | |
2509 | ||
2510 | hdr = lcb->lrh; | |
2511 | *lsn = 0; | |
2512 | ||
2513 | if (lcb_ctx_next != lcb->ctx_mode) | |
2514 | goto check_undo_next; | |
2515 | ||
e8b8e97f | 2516 | /* Loop as long as another lsn can be found. */ |
b46acd6a KK |
2517 | for (;;) { |
2518 | u64 current_lsn; | |
2519 | ||
2520 | err = next_log_lsn(log, hdr, ¤t_lsn); | |
2521 | if (err) | |
2522 | goto out; | |
2523 | ||
2524 | if (!current_lsn) | |
2525 | break; | |
2526 | ||
2527 | if (hdr != lcb->lrh) | |
195c52bd | 2528 | kfree(hdr); |
b46acd6a KK |
2529 | |
2530 | hdr = NULL; | |
2531 | err = read_log_page(log, lsn_to_vbo(log, current_lsn), | |
2532 | (struct RECORD_PAGE_HDR **)&hdr, NULL); | |
2533 | if (err) | |
2534 | goto out; | |
2535 | ||
2536 | if (memcmp(&hdr->client, &lcb->client, | |
2537 | sizeof(struct CLIENT_ID))) { | |
2538 | /*err = -EINVAL; */ | |
2539 | } else if (LfsClientRecord == hdr->record_type) { | |
195c52bd | 2540 | kfree(lcb->lrh); |
b46acd6a KK |
2541 | lcb->lrh = hdr; |
2542 | *lsn = current_lsn; | |
2543 | return 0; | |
2544 | } | |
2545 | } | |
2546 | ||
2547 | out: | |
2548 | if (hdr != lcb->lrh) | |
195c52bd | 2549 | kfree(hdr); |
b46acd6a KK |
2550 | return err; |
2551 | ||
2552 | check_undo_next: | |
2553 | if (lcb_ctx_undo_next == lcb->ctx_mode) | |
2554 | next_lsn = le64_to_cpu(hdr->client_undo_next_lsn); | |
2555 | else if (lcb_ctx_prev == lcb->ctx_mode) | |
2556 | next_lsn = le64_to_cpu(hdr->client_prev_lsn); | |
2557 | else | |
2558 | return 0; | |
2559 | ||
2560 | if (!next_lsn) | |
2561 | return 0; | |
2562 | ||
2563 | if (!verify_client_lsn( | |
2564 | log, Add2Ptr(log->ra, le16_to_cpu(log->ra->client_off)), | |
2565 | next_lsn)) | |
2566 | return 0; | |
2567 | ||
2568 | hdr = NULL; | |
2569 | err = read_log_page(log, lsn_to_vbo(log, next_lsn), | |
2570 | (struct RECORD_PAGE_HDR **)&hdr, NULL); | |
2571 | if (err) | |
2572 | return err; | |
195c52bd | 2573 | kfree(lcb->lrh); |
b46acd6a KK |
2574 | lcb->lrh = hdr; |
2575 | ||
2576 | *lsn = next_lsn; | |
2577 | ||
2578 | return 0; | |
2579 | } | |
2580 | ||
2581 | static int read_next_log_rec(struct ntfs_log *log, struct lcb *lcb, u64 *lsn) | |
2582 | { | |
2583 | int err; | |
2584 | ||
2585 | err = find_client_next_lsn(log, lcb, lsn); | |
2586 | if (err) | |
2587 | return err; | |
2588 | ||
2589 | if (!*lsn) | |
2590 | return 0; | |
2591 | ||
2592 | if (lcb->alloc) | |
195c52bd | 2593 | kfree(lcb->log_rec); |
b46acd6a KK |
2594 | |
2595 | lcb->log_rec = NULL; | |
2596 | lcb->alloc = false; | |
195c52bd | 2597 | kfree(lcb->lrh); |
b46acd6a KK |
2598 | lcb->lrh = NULL; |
2599 | ||
2600 | return find_log_rec(log, *lsn, lcb); | |
2601 | } | |
2602 | ||
2603 | static inline bool check_index_header(const struct INDEX_HDR *hdr, size_t bytes) | |
2604 | { | |
2605 | __le16 mask; | |
2606 | u32 min_de, de_off, used, total; | |
2607 | const struct NTFS_DE *e; | |
2608 | ||
2609 | if (hdr_has_subnode(hdr)) { | |
2610 | min_de = sizeof(struct NTFS_DE) + sizeof(u64); | |
2611 | mask = NTFS_IE_HAS_SUBNODES; | |
2612 | } else { | |
2613 | min_de = sizeof(struct NTFS_DE); | |
2614 | mask = 0; | |
2615 | } | |
2616 | ||
2617 | de_off = le32_to_cpu(hdr->de_off); | |
2618 | used = le32_to_cpu(hdr->used); | |
2619 | total = le32_to_cpu(hdr->total); | |
2620 | ||
2621 | if (de_off > bytes - min_de || used > bytes || total > bytes || | |
2622 | de_off + min_de > used || used > total) { | |
2623 | return false; | |
2624 | } | |
2625 | ||
2626 | e = Add2Ptr(hdr, de_off); | |
2627 | for (;;) { | |
2628 | u16 esize = le16_to_cpu(e->size); | |
2629 | struct NTFS_DE *next = Add2Ptr(e, esize); | |
2630 | ||
2631 | if (esize < min_de || PtrOffset(hdr, next) > used || | |
2632 | (e->flags & NTFS_IE_HAS_SUBNODES) != mask) { | |
2633 | return false; | |
2634 | } | |
2635 | ||
2636 | if (de_is_last(e)) | |
2637 | break; | |
2638 | ||
2639 | e = next; | |
2640 | } | |
2641 | ||
2642 | return true; | |
2643 | } | |
2644 | ||
2645 | static inline bool check_index_buffer(const struct INDEX_BUFFER *ib, u32 bytes) | |
2646 | { | |
2647 | u16 fo; | |
2648 | const struct NTFS_RECORD_HEADER *r = &ib->rhdr; | |
2649 | ||
2650 | if (r->sign != NTFS_INDX_SIGNATURE) | |
2651 | return false; | |
2652 | ||
2653 | fo = (SECTOR_SIZE - ((bytes >> SECTOR_SHIFT) + 1) * sizeof(short)); | |
2654 | ||
2655 | if (le16_to_cpu(r->fix_off) > fo) | |
2656 | return false; | |
2657 | ||
2658 | if ((le16_to_cpu(r->fix_num) - 1) * SECTOR_SIZE != bytes) | |
2659 | return false; | |
2660 | ||
2661 | return check_index_header(&ib->ihdr, | |
2662 | bytes - offsetof(struct INDEX_BUFFER, ihdr)); | |
2663 | } | |
2664 | ||
2665 | static inline bool check_index_root(const struct ATTRIB *attr, | |
2666 | struct ntfs_sb_info *sbi) | |
2667 | { | |
2668 | bool ret; | |
2669 | const struct INDEX_ROOT *root = resident_data(attr); | |
2670 | u8 index_bits = le32_to_cpu(root->index_block_size) >= sbi->cluster_size | |
2671 | ? sbi->cluster_bits | |
2672 | : SECTOR_SHIFT; | |
2673 | u8 block_clst = root->index_block_clst; | |
2674 | ||
2675 | if (le32_to_cpu(attr->res.data_size) < sizeof(struct INDEX_ROOT) || | |
2676 | (root->type != ATTR_NAME && root->type != ATTR_ZERO) || | |
2677 | (root->type == ATTR_NAME && | |
2678 | root->rule != NTFS_COLLATION_TYPE_FILENAME) || | |
2679 | (le32_to_cpu(root->index_block_size) != | |
2680 | (block_clst << index_bits)) || | |
2681 | (block_clst != 1 && block_clst != 2 && block_clst != 4 && | |
2682 | block_clst != 8 && block_clst != 0x10 && block_clst != 0x20 && | |
2683 | block_clst != 0x40 && block_clst != 0x80)) { | |
2684 | return false; | |
2685 | } | |
2686 | ||
2687 | ret = check_index_header(&root->ihdr, | |
2688 | le32_to_cpu(attr->res.data_size) - | |
2689 | offsetof(struct INDEX_ROOT, ihdr)); | |
2690 | return ret; | |
2691 | } | |
2692 | ||
2693 | static inline bool check_attr(const struct MFT_REC *rec, | |
2694 | const struct ATTRIB *attr, | |
2695 | struct ntfs_sb_info *sbi) | |
2696 | { | |
2697 | u32 asize = le32_to_cpu(attr->size); | |
2698 | u32 rsize = 0; | |
2699 | u64 dsize, svcn, evcn; | |
2700 | u16 run_off; | |
2701 | ||
e8b8e97f | 2702 | /* Check the fixed part of the attribute record header. */ |
b46acd6a KK |
2703 | if (asize >= sbi->record_size || |
2704 | asize + PtrOffset(rec, attr) >= sbi->record_size || | |
2705 | (attr->name_len && | |
2706 | le16_to_cpu(attr->name_off) + attr->name_len * sizeof(short) > | |
2707 | asize)) { | |
2708 | return false; | |
2709 | } | |
2710 | ||
e8b8e97f | 2711 | /* Check the attribute fields. */ |
b46acd6a KK |
2712 | switch (attr->non_res) { |
2713 | case 0: | |
2714 | rsize = le32_to_cpu(attr->res.data_size); | |
2715 | if (rsize >= asize || | |
2716 | le16_to_cpu(attr->res.data_off) + rsize > asize) { | |
2717 | return false; | |
2718 | } | |
2719 | break; | |
2720 | ||
2721 | case 1: | |
2722 | dsize = le64_to_cpu(attr->nres.data_size); | |
2723 | svcn = le64_to_cpu(attr->nres.svcn); | |
2724 | evcn = le64_to_cpu(attr->nres.evcn); | |
2725 | run_off = le16_to_cpu(attr->nres.run_off); | |
2726 | ||
2727 | if (svcn > evcn + 1 || run_off >= asize || | |
2728 | le64_to_cpu(attr->nres.valid_size) > dsize || | |
2729 | dsize > le64_to_cpu(attr->nres.alloc_size)) { | |
2730 | return false; | |
2731 | } | |
2732 | ||
2733 | if (run_unpack(NULL, sbi, 0, svcn, evcn, svcn, | |
2734 | Add2Ptr(attr, run_off), asize - run_off) < 0) { | |
2735 | return false; | |
2736 | } | |
2737 | ||
2738 | return true; | |
2739 | ||
2740 | default: | |
2741 | return false; | |
2742 | } | |
2743 | ||
2744 | switch (attr->type) { | |
2745 | case ATTR_NAME: | |
2746 | if (fname_full_size(Add2Ptr( | |
2747 | attr, le16_to_cpu(attr->res.data_off))) > asize) { | |
2748 | return false; | |
2749 | } | |
2750 | break; | |
2751 | ||
2752 | case ATTR_ROOT: | |
2753 | return check_index_root(attr, sbi); | |
2754 | ||
2755 | case ATTR_STD: | |
2756 | if (rsize < sizeof(struct ATTR_STD_INFO5) && | |
2757 | rsize != sizeof(struct ATTR_STD_INFO)) { | |
2758 | return false; | |
2759 | } | |
2760 | break; | |
2761 | ||
2762 | case ATTR_LIST: | |
2763 | case ATTR_ID: | |
2764 | case ATTR_SECURE: | |
2765 | case ATTR_LABEL: | |
2766 | case ATTR_VOL_INFO: | |
2767 | case ATTR_DATA: | |
2768 | case ATTR_ALLOC: | |
2769 | case ATTR_BITMAP: | |
2770 | case ATTR_REPARSE: | |
2771 | case ATTR_EA_INFO: | |
2772 | case ATTR_EA: | |
2773 | case ATTR_PROPERTYSET: | |
2774 | case ATTR_LOGGED_UTILITY_STREAM: | |
2775 | break; | |
2776 | ||
2777 | default: | |
2778 | return false; | |
2779 | } | |
2780 | ||
2781 | return true; | |
2782 | } | |
2783 | ||
2784 | static inline bool check_file_record(const struct MFT_REC *rec, | |
2785 | const struct MFT_REC *rec2, | |
2786 | struct ntfs_sb_info *sbi) | |
2787 | { | |
2788 | const struct ATTRIB *attr; | |
2789 | u16 fo = le16_to_cpu(rec->rhdr.fix_off); | |
2790 | u16 fn = le16_to_cpu(rec->rhdr.fix_num); | |
2791 | u16 ao = le16_to_cpu(rec->attr_off); | |
2792 | u32 rs = sbi->record_size; | |
2793 | ||
e8b8e97f | 2794 | /* Check the file record header for consistency. */ |
b46acd6a KK |
2795 | if (rec->rhdr.sign != NTFS_FILE_SIGNATURE || |
2796 | fo > (SECTOR_SIZE - ((rs >> SECTOR_SHIFT) + 1) * sizeof(short)) || | |
2797 | (fn - 1) * SECTOR_SIZE != rs || ao < MFTRECORD_FIXUP_OFFSET_1 || | |
2798 | ao > sbi->record_size - SIZEOF_RESIDENT || !is_rec_inuse(rec) || | |
2799 | le32_to_cpu(rec->total) != rs) { | |
2800 | return false; | |
2801 | } | |
2802 | ||
e8b8e97f | 2803 | /* Loop to check all of the attributes. */ |
b46acd6a KK |
2804 | for (attr = Add2Ptr(rec, ao); attr->type != ATTR_END; |
2805 | attr = Add2Ptr(attr, le32_to_cpu(attr->size))) { | |
2806 | if (check_attr(rec, attr, sbi)) | |
2807 | continue; | |
2808 | return false; | |
2809 | } | |
2810 | ||
2811 | return true; | |
2812 | } | |
2813 | ||
2814 | static inline int check_lsn(const struct NTFS_RECORD_HEADER *hdr, | |
2815 | const u64 *rlsn) | |
2816 | { | |
2817 | u64 lsn; | |
2818 | ||
2819 | if (!rlsn) | |
2820 | return true; | |
2821 | ||
2822 | lsn = le64_to_cpu(hdr->lsn); | |
2823 | ||
2824 | if (hdr->sign == NTFS_HOLE_SIGNATURE) | |
2825 | return false; | |
2826 | ||
2827 | if (*rlsn > lsn) | |
2828 | return true; | |
2829 | ||
2830 | return false; | |
2831 | } | |
2832 | ||
2833 | static inline bool check_if_attr(const struct MFT_REC *rec, | |
2834 | const struct LOG_REC_HDR *lrh) | |
2835 | { | |
2836 | u16 ro = le16_to_cpu(lrh->record_off); | |
2837 | u16 o = le16_to_cpu(rec->attr_off); | |
2838 | const struct ATTRIB *attr = Add2Ptr(rec, o); | |
2839 | ||
2840 | while (o < ro) { | |
2841 | u32 asize; | |
2842 | ||
2843 | if (attr->type == ATTR_END) | |
2844 | break; | |
2845 | ||
2846 | asize = le32_to_cpu(attr->size); | |
2847 | if (!asize) | |
2848 | break; | |
2849 | ||
2850 | o += asize; | |
2851 | attr = Add2Ptr(attr, asize); | |
2852 | } | |
2853 | ||
2854 | return o == ro; | |
2855 | } | |
2856 | ||
2857 | static inline bool check_if_index_root(const struct MFT_REC *rec, | |
2858 | const struct LOG_REC_HDR *lrh) | |
2859 | { | |
2860 | u16 ro = le16_to_cpu(lrh->record_off); | |
2861 | u16 o = le16_to_cpu(rec->attr_off); | |
2862 | const struct ATTRIB *attr = Add2Ptr(rec, o); | |
2863 | ||
2864 | while (o < ro) { | |
2865 | u32 asize; | |
2866 | ||
2867 | if (attr->type == ATTR_END) | |
2868 | break; | |
2869 | ||
2870 | asize = le32_to_cpu(attr->size); | |
2871 | if (!asize) | |
2872 | break; | |
2873 | ||
2874 | o += asize; | |
2875 | attr = Add2Ptr(attr, asize); | |
2876 | } | |
2877 | ||
2878 | return o == ro && attr->type == ATTR_ROOT; | |
2879 | } | |
2880 | ||
2881 | static inline bool check_if_root_index(const struct ATTRIB *attr, | |
2882 | const struct INDEX_HDR *hdr, | |
2883 | const struct LOG_REC_HDR *lrh) | |
2884 | { | |
2885 | u16 ao = le16_to_cpu(lrh->attr_off); | |
2886 | u32 de_off = le32_to_cpu(hdr->de_off); | |
2887 | u32 o = PtrOffset(attr, hdr) + de_off; | |
2888 | const struct NTFS_DE *e = Add2Ptr(hdr, de_off); | |
2889 | u32 asize = le32_to_cpu(attr->size); | |
2890 | ||
2891 | while (o < ao) { | |
2892 | u16 esize; | |
2893 | ||
2894 | if (o >= asize) | |
2895 | break; | |
2896 | ||
2897 | esize = le16_to_cpu(e->size); | |
2898 | if (!esize) | |
2899 | break; | |
2900 | ||
2901 | o += esize; | |
2902 | e = Add2Ptr(e, esize); | |
2903 | } | |
2904 | ||
2905 | return o == ao; | |
2906 | } | |
2907 | ||
2908 | static inline bool check_if_alloc_index(const struct INDEX_HDR *hdr, | |
2909 | u32 attr_off) | |
2910 | { | |
2911 | u32 de_off = le32_to_cpu(hdr->de_off); | |
2912 | u32 o = offsetof(struct INDEX_BUFFER, ihdr) + de_off; | |
2913 | const struct NTFS_DE *e = Add2Ptr(hdr, de_off); | |
2914 | u32 used = le32_to_cpu(hdr->used); | |
2915 | ||
2916 | while (o < attr_off) { | |
2917 | u16 esize; | |
2918 | ||
2919 | if (de_off >= used) | |
2920 | break; | |
2921 | ||
2922 | esize = le16_to_cpu(e->size); | |
2923 | if (!esize) | |
2924 | break; | |
2925 | ||
2926 | o += esize; | |
2927 | de_off += esize; | |
2928 | e = Add2Ptr(e, esize); | |
2929 | } | |
2930 | ||
2931 | return o == attr_off; | |
2932 | } | |
2933 | ||
2934 | static inline void change_attr_size(struct MFT_REC *rec, struct ATTRIB *attr, | |
2935 | u32 nsize) | |
2936 | { | |
2937 | u32 asize = le32_to_cpu(attr->size); | |
2938 | int dsize = nsize - asize; | |
2939 | u8 *next = Add2Ptr(attr, asize); | |
2940 | u32 used = le32_to_cpu(rec->used); | |
2941 | ||
2942 | memmove(Add2Ptr(attr, nsize), next, used - PtrOffset(rec, next)); | |
2943 | ||
2944 | rec->used = cpu_to_le32(used + dsize); | |
2945 | attr->size = cpu_to_le32(nsize); | |
2946 | } | |
2947 | ||
2948 | struct OpenAttr { | |
2949 | struct ATTRIB *attr; | |
2950 | struct runs_tree *run1; | |
2951 | struct runs_tree run0; | |
2952 | struct ntfs_inode *ni; | |
2953 | // CLST rno; | |
2954 | }; | |
2955 | ||
e8b8e97f KA |
2956 | /* |
2957 | * cmp_type_and_name | |
2958 | * | |
2959 | * Return: 0 if 'attr' has the same type and name. | |
2960 | */ | |
b46acd6a KK |
2961 | static inline int cmp_type_and_name(const struct ATTRIB *a1, |
2962 | const struct ATTRIB *a2) | |
2963 | { | |
2964 | return a1->type != a2->type || a1->name_len != a2->name_len || | |
2965 | (a1->name_len && memcmp(attr_name(a1), attr_name(a2), | |
2966 | a1->name_len * sizeof(short))); | |
2967 | } | |
2968 | ||
2969 | static struct OpenAttr *find_loaded_attr(struct ntfs_log *log, | |
2970 | const struct ATTRIB *attr, CLST rno) | |
2971 | { | |
2972 | struct OPEN_ATTR_ENRTY *oe = NULL; | |
2973 | ||
2974 | while ((oe = enum_rstbl(log->open_attr_tbl, oe))) { | |
2975 | struct OpenAttr *op_attr; | |
2976 | ||
2977 | if (ino_get(&oe->ref) != rno) | |
2978 | continue; | |
2979 | ||
2980 | op_attr = (struct OpenAttr *)oe->ptr; | |
2981 | if (!cmp_type_and_name(op_attr->attr, attr)) | |
2982 | return op_attr; | |
2983 | } | |
2984 | return NULL; | |
2985 | } | |
2986 | ||
2987 | static struct ATTRIB *attr_create_nonres_log(struct ntfs_sb_info *sbi, | |
2988 | enum ATTR_TYPE type, u64 size, | |
2989 | const u16 *name, size_t name_len, | |
2990 | __le16 flags) | |
2991 | { | |
2992 | struct ATTRIB *attr; | |
fa3cacf5 | 2993 | u32 name_size = ALIGN(name_len * sizeof(short), 8); |
b46acd6a KK |
2994 | bool is_ext = flags & (ATTR_FLAG_COMPRESSED | ATTR_FLAG_SPARSED); |
2995 | u32 asize = name_size + | |
2996 | (is_ext ? SIZEOF_NONRESIDENT_EX : SIZEOF_NONRESIDENT); | |
2997 | ||
195c52bd | 2998 | attr = kzalloc(asize, GFP_NOFS); |
b46acd6a KK |
2999 | if (!attr) |
3000 | return NULL; | |
3001 | ||
3002 | attr->type = type; | |
3003 | attr->size = cpu_to_le32(asize); | |
3004 | attr->flags = flags; | |
3005 | attr->non_res = 1; | |
3006 | attr->name_len = name_len; | |
3007 | ||
3008 | attr->nres.evcn = cpu_to_le64((u64)bytes_to_cluster(sbi, size) - 1); | |
3009 | attr->nres.alloc_size = cpu_to_le64(ntfs_up_cluster(sbi, size)); | |
3010 | attr->nres.data_size = cpu_to_le64(size); | |
3011 | attr->nres.valid_size = attr->nres.data_size; | |
3012 | if (is_ext) { | |
3013 | attr->name_off = SIZEOF_NONRESIDENT_EX_LE; | |
3014 | if (is_attr_compressed(attr)) | |
3015 | attr->nres.c_unit = COMPRESSION_UNIT; | |
3016 | ||
3017 | attr->nres.run_off = | |
3018 | cpu_to_le16(SIZEOF_NONRESIDENT_EX + name_size); | |
3019 | memcpy(Add2Ptr(attr, SIZEOF_NONRESIDENT_EX), name, | |
3020 | name_len * sizeof(short)); | |
3021 | } else { | |
3022 | attr->name_off = SIZEOF_NONRESIDENT_LE; | |
3023 | attr->nres.run_off = | |
3024 | cpu_to_le16(SIZEOF_NONRESIDENT + name_size); | |
3025 | memcpy(Add2Ptr(attr, SIZEOF_NONRESIDENT), name, | |
3026 | name_len * sizeof(short)); | |
3027 | } | |
3028 | ||
3029 | return attr; | |
3030 | } | |
3031 | ||
3032 | /* | |
e8b8e97f KA |
3033 | * do_action - Common routine for the Redo and Undo Passes. |
3034 | * @rlsn: If it is NULL then undo. | |
b46acd6a KK |
3035 | */ |
3036 | static int do_action(struct ntfs_log *log, struct OPEN_ATTR_ENRTY *oe, | |
3037 | const struct LOG_REC_HDR *lrh, u32 op, void *data, | |
3038 | u32 dlen, u32 rec_len, const u64 *rlsn) | |
3039 | { | |
3040 | int err = 0; | |
3041 | struct ntfs_sb_info *sbi = log->ni->mi.sbi; | |
3042 | struct inode *inode = NULL, *inode_parent; | |
3043 | struct mft_inode *mi = NULL, *mi2_child = NULL; | |
3044 | CLST rno = 0, rno_base = 0; | |
3045 | struct INDEX_BUFFER *ib = NULL; | |
3046 | struct MFT_REC *rec = NULL; | |
3047 | struct ATTRIB *attr = NULL, *attr2; | |
3048 | struct INDEX_HDR *hdr; | |
3049 | struct INDEX_ROOT *root; | |
3050 | struct NTFS_DE *e, *e1, *e2; | |
3051 | struct NEW_ATTRIBUTE_SIZES *new_sz; | |
3052 | struct ATTR_FILE_NAME *fname; | |
3053 | struct OpenAttr *oa, *oa2; | |
3054 | u32 nsize, t32, asize, used, esize, bmp_off, bmp_bits; | |
3055 | u16 id, id2; | |
3056 | u32 record_size = sbi->record_size; | |
3057 | u64 t64; | |
3058 | u16 roff = le16_to_cpu(lrh->record_off); | |
3059 | u16 aoff = le16_to_cpu(lrh->attr_off); | |
3060 | u64 lco = 0; | |
3061 | u64 cbo = (u64)le16_to_cpu(lrh->cluster_off) << SECTOR_SHIFT; | |
3062 | u64 tvo = le64_to_cpu(lrh->target_vcn) << sbi->cluster_bits; | |
3063 | u64 vbo = cbo + tvo; | |
3064 | void *buffer_le = NULL; | |
3065 | u32 bytes = 0; | |
3066 | bool a_dirty = false; | |
3067 | u16 data_off; | |
3068 | ||
3069 | oa = oe->ptr; | |
3070 | ||
e8b8e97f | 3071 | /* Big switch to prepare. */ |
b46acd6a KK |
3072 | switch (op) { |
3073 | /* ============================================================ | |
e8b8e97f | 3074 | * Process MFT records, as described by the current log record. |
b46acd6a KK |
3075 | * ============================================================ |
3076 | */ | |
3077 | case InitializeFileRecordSegment: | |
3078 | case DeallocateFileRecordSegment: | |
3079 | case WriteEndOfFileRecordSegment: | |
3080 | case CreateAttribute: | |
3081 | case DeleteAttribute: | |
3082 | case UpdateResidentValue: | |
3083 | case UpdateMappingPairs: | |
3084 | case SetNewAttributeSizes: | |
3085 | case AddIndexEntryRoot: | |
3086 | case DeleteIndexEntryRoot: | |
3087 | case SetIndexEntryVcnRoot: | |
3088 | case UpdateFileNameRoot: | |
3089 | case UpdateRecordDataRoot: | |
3090 | case ZeroEndOfFileRecord: | |
3091 | rno = vbo >> sbi->record_bits; | |
3092 | inode = ilookup(sbi->sb, rno); | |
3093 | if (inode) { | |
3094 | mi = &ntfs_i(inode)->mi; | |
3095 | } else if (op == InitializeFileRecordSegment) { | |
195c52bd | 3096 | mi = kzalloc(sizeof(struct mft_inode), GFP_NOFS); |
b46acd6a KK |
3097 | if (!mi) |
3098 | return -ENOMEM; | |
3099 | err = mi_format_new(mi, sbi, rno, 0, false); | |
3100 | if (err) | |
3101 | goto out; | |
3102 | } else { | |
e8b8e97f | 3103 | /* Read from disk. */ |
b46acd6a KK |
3104 | err = mi_get(sbi, rno, &mi); |
3105 | if (err) | |
3106 | return err; | |
3107 | } | |
3108 | rec = mi->mrec; | |
3109 | ||
3110 | if (op == DeallocateFileRecordSegment) | |
3111 | goto skip_load_parent; | |
3112 | ||
3113 | if (InitializeFileRecordSegment != op) { | |
3114 | if (rec->rhdr.sign == NTFS_BAAD_SIGNATURE) | |
3115 | goto dirty_vol; | |
3116 | if (!check_lsn(&rec->rhdr, rlsn)) | |
3117 | goto out; | |
3118 | if (!check_file_record(rec, NULL, sbi)) | |
3119 | goto dirty_vol; | |
3120 | attr = Add2Ptr(rec, roff); | |
3121 | } | |
3122 | ||
3123 | if (is_rec_base(rec) || InitializeFileRecordSegment == op) { | |
3124 | rno_base = rno; | |
3125 | goto skip_load_parent; | |
3126 | } | |
3127 | ||
3128 | rno_base = ino_get(&rec->parent_ref); | |
3129 | inode_parent = ntfs_iget5(sbi->sb, &rec->parent_ref, NULL); | |
3130 | if (IS_ERR(inode_parent)) | |
3131 | goto skip_load_parent; | |
3132 | ||
3133 | if (is_bad_inode(inode_parent)) { | |
3134 | iput(inode_parent); | |
3135 | goto skip_load_parent; | |
3136 | } | |
3137 | ||
3138 | if (ni_load_mi_ex(ntfs_i(inode_parent), rno, &mi2_child)) { | |
3139 | iput(inode_parent); | |
3140 | } else { | |
3141 | if (mi2_child->mrec != mi->mrec) | |
3142 | memcpy(mi2_child->mrec, mi->mrec, | |
3143 | sbi->record_size); | |
3144 | ||
3145 | if (inode) | |
3146 | iput(inode); | |
3147 | else if (mi) | |
3148 | mi_put(mi); | |
3149 | ||
3150 | inode = inode_parent; | |
3151 | mi = mi2_child; | |
3152 | rec = mi2_child->mrec; | |
3153 | attr = Add2Ptr(rec, roff); | |
3154 | } | |
3155 | ||
3156 | skip_load_parent: | |
3157 | inode_parent = NULL; | |
3158 | break; | |
3159 | ||
e8b8e97f KA |
3160 | /* |
3161 | * Process attributes, as described by the current log record. | |
b46acd6a KK |
3162 | */ |
3163 | case UpdateNonresidentValue: | |
3164 | case AddIndexEntryAllocation: | |
3165 | case DeleteIndexEntryAllocation: | |
3166 | case WriteEndOfIndexBuffer: | |
3167 | case SetIndexEntryVcnAllocation: | |
3168 | case UpdateFileNameAllocation: | |
3169 | case SetBitsInNonresidentBitMap: | |
3170 | case ClearBitsInNonresidentBitMap: | |
3171 | case UpdateRecordDataAllocation: | |
3172 | attr = oa->attr; | |
3173 | bytes = UpdateNonresidentValue == op ? dlen : 0; | |
3174 | lco = (u64)le16_to_cpu(lrh->lcns_follow) << sbi->cluster_bits; | |
3175 | ||
3176 | if (attr->type == ATTR_ALLOC) { | |
3177 | t32 = le32_to_cpu(oe->bytes_per_index); | |
3178 | if (bytes < t32) | |
3179 | bytes = t32; | |
3180 | } | |
3181 | ||
3182 | if (!bytes) | |
3183 | bytes = lco - cbo; | |
3184 | ||
3185 | bytes += roff; | |
3186 | if (attr->type == ATTR_ALLOC) | |
3187 | bytes = (bytes + 511) & ~511; // align | |
3188 | ||
195c52bd | 3189 | buffer_le = kmalloc(bytes, GFP_NOFS); |
b46acd6a KK |
3190 | if (!buffer_le) |
3191 | return -ENOMEM; | |
3192 | ||
3193 | err = ntfs_read_run_nb(sbi, oa->run1, vbo, buffer_le, bytes, | |
3194 | NULL); | |
3195 | if (err) | |
3196 | goto out; | |
3197 | ||
3198 | if (attr->type == ATTR_ALLOC && *(int *)buffer_le) | |
3199 | ntfs_fix_post_read(buffer_le, bytes, false); | |
3200 | break; | |
3201 | ||
3202 | default: | |
3203 | WARN_ON(1); | |
3204 | } | |
3205 | ||
e8b8e97f | 3206 | /* Big switch to do operation. */ |
b46acd6a KK |
3207 | switch (op) { |
3208 | case InitializeFileRecordSegment: | |
3209 | if (roff + dlen > record_size) | |
3210 | goto dirty_vol; | |
3211 | ||
3212 | memcpy(Add2Ptr(rec, roff), data, dlen); | |
3213 | mi->dirty = true; | |
3214 | break; | |
3215 | ||
3216 | case DeallocateFileRecordSegment: | |
3217 | clear_rec_inuse(rec); | |
3218 | le16_add_cpu(&rec->seq, 1); | |
3219 | mi->dirty = true; | |
3220 | break; | |
3221 | ||
3222 | case WriteEndOfFileRecordSegment: | |
3223 | attr2 = (struct ATTRIB *)data; | |
3224 | if (!check_if_attr(rec, lrh) || roff + dlen > record_size) | |
3225 | goto dirty_vol; | |
3226 | ||
3227 | memmove(attr, attr2, dlen); | |
fa3cacf5 | 3228 | rec->used = cpu_to_le32(ALIGN(roff + dlen, 8)); |
b46acd6a KK |
3229 | |
3230 | mi->dirty = true; | |
3231 | break; | |
3232 | ||
3233 | case CreateAttribute: | |
3234 | attr2 = (struct ATTRIB *)data; | |
3235 | asize = le32_to_cpu(attr2->size); | |
3236 | used = le32_to_cpu(rec->used); | |
3237 | ||
3238 | if (!check_if_attr(rec, lrh) || dlen < SIZEOF_RESIDENT || | |
fa3cacf5 | 3239 | !IS_ALIGNED(asize, 8) || |
b46acd6a KK |
3240 | Add2Ptr(attr2, asize) > Add2Ptr(lrh, rec_len) || |
3241 | dlen > record_size - used) { | |
3242 | goto dirty_vol; | |
3243 | } | |
3244 | ||
3245 | memmove(Add2Ptr(attr, asize), attr, used - roff); | |
3246 | memcpy(attr, attr2, asize); | |
3247 | ||
3248 | rec->used = cpu_to_le32(used + asize); | |
3249 | id = le16_to_cpu(rec->next_attr_id); | |
3250 | id2 = le16_to_cpu(attr2->id); | |
3251 | if (id <= id2) | |
3252 | rec->next_attr_id = cpu_to_le16(id2 + 1); | |
3253 | if (is_attr_indexed(attr)) | |
3254 | le16_add_cpu(&rec->hard_links, 1); | |
3255 | ||
3256 | oa2 = find_loaded_attr(log, attr, rno_base); | |
3257 | if (oa2) { | |
195c52bd KA |
3258 | void *p2 = kmemdup(attr, le32_to_cpu(attr->size), |
3259 | GFP_NOFS); | |
b46acd6a KK |
3260 | if (p2) { |
3261 | // run_close(oa2->run1); | |
195c52bd | 3262 | kfree(oa2->attr); |
b46acd6a KK |
3263 | oa2->attr = p2; |
3264 | } | |
3265 | } | |
3266 | ||
3267 | mi->dirty = true; | |
3268 | break; | |
3269 | ||
3270 | case DeleteAttribute: | |
3271 | asize = le32_to_cpu(attr->size); | |
3272 | used = le32_to_cpu(rec->used); | |
3273 | ||
3274 | if (!check_if_attr(rec, lrh)) | |
3275 | goto dirty_vol; | |
3276 | ||
3277 | rec->used = cpu_to_le32(used - asize); | |
3278 | if (is_attr_indexed(attr)) | |
3279 | le16_add_cpu(&rec->hard_links, -1); | |
3280 | ||
3281 | memmove(attr, Add2Ptr(attr, asize), used - asize - roff); | |
3282 | ||
3283 | mi->dirty = true; | |
3284 | break; | |
3285 | ||
3286 | case UpdateResidentValue: | |
3287 | nsize = aoff + dlen; | |
3288 | ||
3289 | if (!check_if_attr(rec, lrh)) | |
3290 | goto dirty_vol; | |
3291 | ||
3292 | asize = le32_to_cpu(attr->size); | |
3293 | used = le32_to_cpu(rec->used); | |
3294 | ||
3295 | if (lrh->redo_len == lrh->undo_len) { | |
3296 | if (nsize > asize) | |
3297 | goto dirty_vol; | |
3298 | goto move_data; | |
3299 | } | |
3300 | ||
3301 | if (nsize > asize && nsize - asize > record_size - used) | |
3302 | goto dirty_vol; | |
3303 | ||
fa3cacf5 | 3304 | nsize = ALIGN(nsize, 8); |
b46acd6a KK |
3305 | data_off = le16_to_cpu(attr->res.data_off); |
3306 | ||
3307 | if (nsize < asize) { | |
3308 | memmove(Add2Ptr(attr, aoff), data, dlen); | |
e8b8e97f | 3309 | data = NULL; // To skip below memmove(). |
b46acd6a KK |
3310 | } |
3311 | ||
3312 | memmove(Add2Ptr(attr, nsize), Add2Ptr(attr, asize), | |
3313 | used - le16_to_cpu(lrh->record_off) - asize); | |
3314 | ||
3315 | rec->used = cpu_to_le32(used + nsize - asize); | |
3316 | attr->size = cpu_to_le32(nsize); | |
3317 | attr->res.data_size = cpu_to_le32(aoff + dlen - data_off); | |
3318 | ||
3319 | move_data: | |
3320 | if (data) | |
3321 | memmove(Add2Ptr(attr, aoff), data, dlen); | |
3322 | ||
3323 | oa2 = find_loaded_attr(log, attr, rno_base); | |
3324 | if (oa2) { | |
195c52bd KA |
3325 | void *p2 = kmemdup(attr, le32_to_cpu(attr->size), |
3326 | GFP_NOFS); | |
b46acd6a KK |
3327 | if (p2) { |
3328 | // run_close(&oa2->run0); | |
3329 | oa2->run1 = &oa2->run0; | |
195c52bd | 3330 | kfree(oa2->attr); |
b46acd6a KK |
3331 | oa2->attr = p2; |
3332 | } | |
3333 | } | |
3334 | ||
3335 | mi->dirty = true; | |
3336 | break; | |
3337 | ||
3338 | case UpdateMappingPairs: | |
3339 | nsize = aoff + dlen; | |
3340 | asize = le32_to_cpu(attr->size); | |
3341 | used = le32_to_cpu(rec->used); | |
3342 | ||
3343 | if (!check_if_attr(rec, lrh) || !attr->non_res || | |
3344 | aoff < le16_to_cpu(attr->nres.run_off) || aoff > asize || | |
3345 | (nsize > asize && nsize - asize > record_size - used)) { | |
3346 | goto dirty_vol; | |
3347 | } | |
3348 | ||
fa3cacf5 | 3349 | nsize = ALIGN(nsize, 8); |
b46acd6a KK |
3350 | |
3351 | memmove(Add2Ptr(attr, nsize), Add2Ptr(attr, asize), | |
3352 | used - le16_to_cpu(lrh->record_off) - asize); | |
3353 | rec->used = cpu_to_le32(used + nsize - asize); | |
3354 | attr->size = cpu_to_le32(nsize); | |
3355 | memmove(Add2Ptr(attr, aoff), data, dlen); | |
3356 | ||
3357 | if (run_get_highest_vcn(le64_to_cpu(attr->nres.svcn), | |
3358 | attr_run(attr), &t64)) { | |
3359 | goto dirty_vol; | |
3360 | } | |
3361 | ||
3362 | attr->nres.evcn = cpu_to_le64(t64); | |
3363 | oa2 = find_loaded_attr(log, attr, rno_base); | |
3364 | if (oa2 && oa2->attr->non_res) | |
3365 | oa2->attr->nres.evcn = attr->nres.evcn; | |
3366 | ||
3367 | mi->dirty = true; | |
3368 | break; | |
3369 | ||
3370 | case SetNewAttributeSizes: | |
3371 | new_sz = data; | |
3372 | if (!check_if_attr(rec, lrh) || !attr->non_res) | |
3373 | goto dirty_vol; | |
3374 | ||
3375 | attr->nres.alloc_size = new_sz->alloc_size; | |
3376 | attr->nres.data_size = new_sz->data_size; | |
3377 | attr->nres.valid_size = new_sz->valid_size; | |
3378 | ||
3379 | if (dlen >= sizeof(struct NEW_ATTRIBUTE_SIZES)) | |
3380 | attr->nres.total_size = new_sz->total_size; | |
3381 | ||
3382 | oa2 = find_loaded_attr(log, attr, rno_base); | |
3383 | if (oa2) { | |
195c52bd KA |
3384 | void *p2 = kmemdup(attr, le32_to_cpu(attr->size), |
3385 | GFP_NOFS); | |
b46acd6a | 3386 | if (p2) { |
195c52bd | 3387 | kfree(oa2->attr); |
b46acd6a KK |
3388 | oa2->attr = p2; |
3389 | } | |
3390 | } | |
3391 | mi->dirty = true; | |
3392 | break; | |
3393 | ||
3394 | case AddIndexEntryRoot: | |
3395 | e = (struct NTFS_DE *)data; | |
3396 | esize = le16_to_cpu(e->size); | |
3397 | root = resident_data(attr); | |
3398 | hdr = &root->ihdr; | |
3399 | used = le32_to_cpu(hdr->used); | |
3400 | ||
3401 | if (!check_if_index_root(rec, lrh) || | |
3402 | !check_if_root_index(attr, hdr, lrh) || | |
3403 | Add2Ptr(data, esize) > Add2Ptr(lrh, rec_len) || | |
3404 | esize > le32_to_cpu(rec->total) - le32_to_cpu(rec->used)) { | |
3405 | goto dirty_vol; | |
3406 | } | |
3407 | ||
3408 | e1 = Add2Ptr(attr, le16_to_cpu(lrh->attr_off)); | |
3409 | ||
3410 | change_attr_size(rec, attr, le32_to_cpu(attr->size) + esize); | |
3411 | ||
3412 | memmove(Add2Ptr(e1, esize), e1, | |
3413 | PtrOffset(e1, Add2Ptr(hdr, used))); | |
3414 | memmove(e1, e, esize); | |
3415 | ||
3416 | le32_add_cpu(&attr->res.data_size, esize); | |
3417 | hdr->used = cpu_to_le32(used + esize); | |
3418 | le32_add_cpu(&hdr->total, esize); | |
3419 | ||
3420 | mi->dirty = true; | |
3421 | break; | |
3422 | ||
3423 | case DeleteIndexEntryRoot: | |
3424 | root = resident_data(attr); | |
3425 | hdr = &root->ihdr; | |
3426 | used = le32_to_cpu(hdr->used); | |
3427 | ||
3428 | if (!check_if_index_root(rec, lrh) || | |
3429 | !check_if_root_index(attr, hdr, lrh)) { | |
3430 | goto dirty_vol; | |
3431 | } | |
3432 | ||
3433 | e1 = Add2Ptr(attr, le16_to_cpu(lrh->attr_off)); | |
3434 | esize = le16_to_cpu(e1->size); | |
3435 | e2 = Add2Ptr(e1, esize); | |
3436 | ||
3437 | memmove(e1, e2, PtrOffset(e2, Add2Ptr(hdr, used))); | |
3438 | ||
3439 | le32_sub_cpu(&attr->res.data_size, esize); | |
3440 | hdr->used = cpu_to_le32(used - esize); | |
3441 | le32_sub_cpu(&hdr->total, esize); | |
3442 | ||
3443 | change_attr_size(rec, attr, le32_to_cpu(attr->size) - esize); | |
3444 | ||
3445 | mi->dirty = true; | |
3446 | break; | |
3447 | ||
3448 | case SetIndexEntryVcnRoot: | |
3449 | root = resident_data(attr); | |
3450 | hdr = &root->ihdr; | |
3451 | ||
3452 | if (!check_if_index_root(rec, lrh) || | |
3453 | !check_if_root_index(attr, hdr, lrh)) { | |
3454 | goto dirty_vol; | |
3455 | } | |
3456 | ||
3457 | e = Add2Ptr(attr, le16_to_cpu(lrh->attr_off)); | |
3458 | ||
3459 | de_set_vbn_le(e, *(__le64 *)data); | |
3460 | mi->dirty = true; | |
3461 | break; | |
3462 | ||
3463 | case UpdateFileNameRoot: | |
3464 | root = resident_data(attr); | |
3465 | hdr = &root->ihdr; | |
3466 | ||
3467 | if (!check_if_index_root(rec, lrh) || | |
3468 | !check_if_root_index(attr, hdr, lrh)) { | |
3469 | goto dirty_vol; | |
3470 | } | |
3471 | ||
3472 | e = Add2Ptr(attr, le16_to_cpu(lrh->attr_off)); | |
3473 | fname = (struct ATTR_FILE_NAME *)(e + 1); | |
3474 | memmove(&fname->dup, data, sizeof(fname->dup)); // | |
3475 | mi->dirty = true; | |
3476 | break; | |
3477 | ||
3478 | case UpdateRecordDataRoot: | |
3479 | root = resident_data(attr); | |
3480 | hdr = &root->ihdr; | |
3481 | ||
3482 | if (!check_if_index_root(rec, lrh) || | |
3483 | !check_if_root_index(attr, hdr, lrh)) { | |
3484 | goto dirty_vol; | |
3485 | } | |
3486 | ||
3487 | e = Add2Ptr(attr, le16_to_cpu(lrh->attr_off)); | |
3488 | ||
3489 | memmove(Add2Ptr(e, le16_to_cpu(e->view.data_off)), data, dlen); | |
3490 | ||
3491 | mi->dirty = true; | |
3492 | break; | |
3493 | ||
3494 | case ZeroEndOfFileRecord: | |
3495 | if (roff + dlen > record_size) | |
3496 | goto dirty_vol; | |
3497 | ||
3498 | memset(attr, 0, dlen); | |
3499 | mi->dirty = true; | |
3500 | break; | |
3501 | ||
3502 | case UpdateNonresidentValue: | |
3503 | if (lco < cbo + roff + dlen) | |
3504 | goto dirty_vol; | |
3505 | ||
3506 | memcpy(Add2Ptr(buffer_le, roff), data, dlen); | |
3507 | ||
3508 | a_dirty = true; | |
3509 | if (attr->type == ATTR_ALLOC) | |
3510 | ntfs_fix_pre_write(buffer_le, bytes); | |
3511 | break; | |
3512 | ||
3513 | case AddIndexEntryAllocation: | |
3514 | ib = Add2Ptr(buffer_le, roff); | |
3515 | hdr = &ib->ihdr; | |
3516 | e = data; | |
3517 | esize = le16_to_cpu(e->size); | |
3518 | e1 = Add2Ptr(ib, aoff); | |
3519 | ||
3520 | if (is_baad(&ib->rhdr)) | |
3521 | goto dirty_vol; | |
3522 | if (!check_lsn(&ib->rhdr, rlsn)) | |
3523 | goto out; | |
3524 | ||
3525 | used = le32_to_cpu(hdr->used); | |
3526 | ||
3527 | if (!check_index_buffer(ib, bytes) || | |
3528 | !check_if_alloc_index(hdr, aoff) || | |
3529 | Add2Ptr(e, esize) > Add2Ptr(lrh, rec_len) || | |
3530 | used + esize > le32_to_cpu(hdr->total)) { | |
3531 | goto dirty_vol; | |
3532 | } | |
3533 | ||
3534 | memmove(Add2Ptr(e1, esize), e1, | |
3535 | PtrOffset(e1, Add2Ptr(hdr, used))); | |
3536 | memcpy(e1, e, esize); | |
3537 | ||
3538 | hdr->used = cpu_to_le32(used + esize); | |
3539 | ||
3540 | a_dirty = true; | |
3541 | ||
3542 | ntfs_fix_pre_write(&ib->rhdr, bytes); | |
3543 | break; | |
3544 | ||
3545 | case DeleteIndexEntryAllocation: | |
3546 | ib = Add2Ptr(buffer_le, roff); | |
3547 | hdr = &ib->ihdr; | |
3548 | e = Add2Ptr(ib, aoff); | |
3549 | esize = le16_to_cpu(e->size); | |
3550 | ||
3551 | if (is_baad(&ib->rhdr)) | |
3552 | goto dirty_vol; | |
3553 | if (!check_lsn(&ib->rhdr, rlsn)) | |
3554 | goto out; | |
3555 | ||
3556 | if (!check_index_buffer(ib, bytes) || | |
3557 | !check_if_alloc_index(hdr, aoff)) { | |
3558 | goto dirty_vol; | |
3559 | } | |
3560 | ||
3561 | e1 = Add2Ptr(e, esize); | |
3562 | nsize = esize; | |
3563 | used = le32_to_cpu(hdr->used); | |
3564 | ||
3565 | memmove(e, e1, PtrOffset(e1, Add2Ptr(hdr, used))); | |
3566 | ||
3567 | hdr->used = cpu_to_le32(used - nsize); | |
3568 | ||
3569 | a_dirty = true; | |
3570 | ||
3571 | ntfs_fix_pre_write(&ib->rhdr, bytes); | |
3572 | break; | |
3573 | ||
3574 | case WriteEndOfIndexBuffer: | |
3575 | ib = Add2Ptr(buffer_le, roff); | |
3576 | hdr = &ib->ihdr; | |
3577 | e = Add2Ptr(ib, aoff); | |
3578 | ||
3579 | if (is_baad(&ib->rhdr)) | |
3580 | goto dirty_vol; | |
3581 | if (!check_lsn(&ib->rhdr, rlsn)) | |
3582 | goto out; | |
3583 | if (!check_index_buffer(ib, bytes) || | |
3584 | !check_if_alloc_index(hdr, aoff) || | |
3585 | aoff + dlen > offsetof(struct INDEX_BUFFER, ihdr) + | |
3586 | le32_to_cpu(hdr->total)) { | |
3587 | goto dirty_vol; | |
3588 | } | |
3589 | ||
3590 | hdr->used = cpu_to_le32(dlen + PtrOffset(hdr, e)); | |
3591 | memmove(e, data, dlen); | |
3592 | ||
3593 | a_dirty = true; | |
3594 | ntfs_fix_pre_write(&ib->rhdr, bytes); | |
3595 | break; | |
3596 | ||
3597 | case SetIndexEntryVcnAllocation: | |
3598 | ib = Add2Ptr(buffer_le, roff); | |
3599 | hdr = &ib->ihdr; | |
3600 | e = Add2Ptr(ib, aoff); | |
3601 | ||
3602 | if (is_baad(&ib->rhdr)) | |
3603 | goto dirty_vol; | |
3604 | ||
3605 | if (!check_lsn(&ib->rhdr, rlsn)) | |
3606 | goto out; | |
3607 | if (!check_index_buffer(ib, bytes) || | |
3608 | !check_if_alloc_index(hdr, aoff)) { | |
3609 | goto dirty_vol; | |
3610 | } | |
3611 | ||
3612 | de_set_vbn_le(e, *(__le64 *)data); | |
3613 | ||
3614 | a_dirty = true; | |
3615 | ntfs_fix_pre_write(&ib->rhdr, bytes); | |
3616 | break; | |
3617 | ||
3618 | case UpdateFileNameAllocation: | |
3619 | ib = Add2Ptr(buffer_le, roff); | |
3620 | hdr = &ib->ihdr; | |
3621 | e = Add2Ptr(ib, aoff); | |
3622 | ||
3623 | if (is_baad(&ib->rhdr)) | |
3624 | goto dirty_vol; | |
3625 | ||
3626 | if (!check_lsn(&ib->rhdr, rlsn)) | |
3627 | goto out; | |
3628 | if (!check_index_buffer(ib, bytes) || | |
3629 | !check_if_alloc_index(hdr, aoff)) { | |
3630 | goto dirty_vol; | |
3631 | } | |
3632 | ||
3633 | fname = (struct ATTR_FILE_NAME *)(e + 1); | |
3634 | memmove(&fname->dup, data, sizeof(fname->dup)); | |
3635 | ||
3636 | a_dirty = true; | |
3637 | ntfs_fix_pre_write(&ib->rhdr, bytes); | |
3638 | break; | |
3639 | ||
3640 | case SetBitsInNonresidentBitMap: | |
3641 | bmp_off = | |
3642 | le32_to_cpu(((struct BITMAP_RANGE *)data)->bitmap_off); | |
3643 | bmp_bits = le32_to_cpu(((struct BITMAP_RANGE *)data)->bits); | |
3644 | ||
3645 | if (cbo + (bmp_off + 7) / 8 > lco || | |
3646 | cbo + ((bmp_off + bmp_bits + 7) / 8) > lco) { | |
3647 | goto dirty_vol; | |
3648 | } | |
3649 | ||
3650 | __bitmap_set(Add2Ptr(buffer_le, roff), bmp_off, bmp_bits); | |
3651 | a_dirty = true; | |
3652 | break; | |
3653 | ||
3654 | case ClearBitsInNonresidentBitMap: | |
3655 | bmp_off = | |
3656 | le32_to_cpu(((struct BITMAP_RANGE *)data)->bitmap_off); | |
3657 | bmp_bits = le32_to_cpu(((struct BITMAP_RANGE *)data)->bits); | |
3658 | ||
3659 | if (cbo + (bmp_off + 7) / 8 > lco || | |
3660 | cbo + ((bmp_off + bmp_bits + 7) / 8) > lco) { | |
3661 | goto dirty_vol; | |
3662 | } | |
3663 | ||
3664 | __bitmap_clear(Add2Ptr(buffer_le, roff), bmp_off, bmp_bits); | |
3665 | a_dirty = true; | |
3666 | break; | |
3667 | ||
3668 | case UpdateRecordDataAllocation: | |
3669 | ib = Add2Ptr(buffer_le, roff); | |
3670 | hdr = &ib->ihdr; | |
3671 | e = Add2Ptr(ib, aoff); | |
3672 | ||
3673 | if (is_baad(&ib->rhdr)) | |
3674 | goto dirty_vol; | |
3675 | ||
3676 | if (!check_lsn(&ib->rhdr, rlsn)) | |
3677 | goto out; | |
3678 | if (!check_index_buffer(ib, bytes) || | |
3679 | !check_if_alloc_index(hdr, aoff)) { | |
3680 | goto dirty_vol; | |
3681 | } | |
3682 | ||
3683 | memmove(Add2Ptr(e, le16_to_cpu(e->view.data_off)), data, dlen); | |
3684 | ||
3685 | a_dirty = true; | |
3686 | ntfs_fix_pre_write(&ib->rhdr, bytes); | |
3687 | break; | |
3688 | ||
3689 | default: | |
3690 | WARN_ON(1); | |
3691 | } | |
3692 | ||
3693 | if (rlsn) { | |
3694 | __le64 t64 = cpu_to_le64(*rlsn); | |
3695 | ||
3696 | if (rec) | |
3697 | rec->rhdr.lsn = t64; | |
3698 | if (ib) | |
3699 | ib->rhdr.lsn = t64; | |
3700 | } | |
3701 | ||
3702 | if (mi && mi->dirty) { | |
3703 | err = mi_write(mi, 0); | |
3704 | if (err) | |
3705 | goto out; | |
3706 | } | |
3707 | ||
3708 | if (a_dirty) { | |
3709 | attr = oa->attr; | |
3710 | err = ntfs_sb_write_run(sbi, oa->run1, vbo, buffer_le, bytes); | |
3711 | if (err) | |
3712 | goto out; | |
3713 | } | |
3714 | ||
3715 | out: | |
3716 | ||
3717 | if (inode) | |
3718 | iput(inode); | |
3719 | else if (mi != mi2_child) | |
3720 | mi_put(mi); | |
3721 | ||
195c52bd | 3722 | kfree(buffer_le); |
b46acd6a KK |
3723 | |
3724 | return err; | |
3725 | ||
3726 | dirty_vol: | |
3727 | log->set_dirty = true; | |
3728 | goto out; | |
3729 | } | |
3730 | ||
3731 | /* | |
e8b8e97f | 3732 | * log_replay - Replays log and empties it. |
b46acd6a | 3733 | * |
e8b8e97f KA |
3734 | * This function is called during mount operation. |
3735 | * It replays log and empties it. | |
3736 | * Initialized is set false if logfile contains '-1'. | |
b46acd6a KK |
3737 | */ |
3738 | int log_replay(struct ntfs_inode *ni, bool *initialized) | |
3739 | { | |
3740 | int err; | |
3741 | struct ntfs_sb_info *sbi = ni->mi.sbi; | |
3742 | struct ntfs_log *log; | |
3743 | ||
3744 | struct restart_info rst_info, rst_info2; | |
3745 | u64 rec_lsn, ra_lsn, checkpt_lsn = 0, rlsn = 0; | |
3746 | struct ATTR_NAME_ENTRY *attr_names = NULL; | |
3747 | struct ATTR_NAME_ENTRY *ane; | |
3748 | struct RESTART_TABLE *dptbl = NULL; | |
3749 | struct RESTART_TABLE *trtbl = NULL; | |
3750 | const struct RESTART_TABLE *rt; | |
3751 | struct RESTART_TABLE *oatbl = NULL; | |
3752 | struct inode *inode; | |
3753 | struct OpenAttr *oa; | |
3754 | struct ntfs_inode *ni_oe; | |
3755 | struct ATTRIB *attr = NULL; | |
3756 | u64 size, vcn, undo_next_lsn; | |
3757 | CLST rno, lcn, lcn0, len0, clen; | |
3758 | void *data; | |
3759 | struct NTFS_RESTART *rst = NULL; | |
3760 | struct lcb *lcb = NULL; | |
3761 | struct OPEN_ATTR_ENRTY *oe; | |
3762 | struct TRANSACTION_ENTRY *tr; | |
3763 | struct DIR_PAGE_ENTRY *dp; | |
3764 | u32 i, bytes_per_attr_entry; | |
3765 | u32 l_size = ni->vfs_inode.i_size; | |
3766 | u32 orig_file_size = l_size; | |
3767 | u32 page_size, vbo, tail, off, dlen; | |
3768 | u32 saved_len, rec_len, transact_id; | |
3769 | bool use_second_page; | |
3770 | struct RESTART_AREA *ra2, *ra = NULL; | |
3771 | struct CLIENT_REC *ca, *cr; | |
3772 | __le16 client; | |
3773 | struct RESTART_HDR *rh; | |
3774 | const struct LFS_RECORD_HDR *frh; | |
3775 | const struct LOG_REC_HDR *lrh; | |
3776 | bool is_mapped; | |
3777 | bool is_ro = sb_rdonly(sbi->sb); | |
3778 | u64 t64; | |
3779 | u16 t16; | |
3780 | u32 t32; | |
3781 | ||
e8b8e97f | 3782 | /* Get the size of page. NOTE: To replay we can use default page. */ |
b46acd6a KK |
3783 | #if PAGE_SIZE >= DefaultLogPageSize && PAGE_SIZE <= DefaultLogPageSize * 2 |
3784 | page_size = norm_file_page(PAGE_SIZE, &l_size, true); | |
3785 | #else | |
3786 | page_size = norm_file_page(PAGE_SIZE, &l_size, false); | |
3787 | #endif | |
3788 | if (!page_size) | |
3789 | return -EINVAL; | |
3790 | ||
195c52bd | 3791 | log = kzalloc(sizeof(struct ntfs_log), GFP_NOFS); |
b46acd6a KK |
3792 | if (!log) |
3793 | return -ENOMEM; | |
3794 | ||
3795 | log->ni = ni; | |
3796 | log->l_size = l_size; | |
195c52bd | 3797 | log->one_page_buf = kmalloc(page_size, GFP_NOFS); |
b46acd6a KK |
3798 | |
3799 | if (!log->one_page_buf) { | |
3800 | err = -ENOMEM; | |
3801 | goto out; | |
3802 | } | |
3803 | ||
3804 | log->page_size = page_size; | |
3805 | log->page_mask = page_size - 1; | |
3806 | log->page_bits = blksize_bits(page_size); | |
3807 | ||
e8b8e97f | 3808 | /* Look for a restart area on the disk. */ |
b46acd6a KK |
3809 | err = log_read_rst(log, l_size, true, &rst_info); |
3810 | if (err) | |
3811 | goto out; | |
3812 | ||
3813 | /* remember 'initialized' */ | |
3814 | *initialized = rst_info.initialized; | |
3815 | ||
3816 | if (!rst_info.restart) { | |
3817 | if (rst_info.initialized) { | |
e8b8e97f | 3818 | /* No restart area but the file is not initialized. */ |
b46acd6a KK |
3819 | err = -EINVAL; |
3820 | goto out; | |
3821 | } | |
3822 | ||
3823 | log_init_pg_hdr(log, page_size, page_size, 1, 1); | |
3824 | log_create(log, l_size, 0, get_random_int(), false, false); | |
3825 | ||
3826 | log->ra = ra; | |
3827 | ||
3828 | ra = log_create_ra(log); | |
3829 | if (!ra) { | |
3830 | err = -ENOMEM; | |
3831 | goto out; | |
3832 | } | |
3833 | log->ra = ra; | |
3834 | log->init_ra = true; | |
3835 | ||
3836 | goto process_log; | |
3837 | } | |
3838 | ||
3839 | /* | |
3840 | * If the restart offset above wasn't zero then we won't | |
e8b8e97f | 3841 | * look for a second restart. |
b46acd6a KK |
3842 | */ |
3843 | if (rst_info.vbo) | |
3844 | goto check_restart_area; | |
3845 | ||
3846 | err = log_read_rst(log, l_size, false, &rst_info2); | |
3847 | ||
e8b8e97f | 3848 | /* Determine which restart area to use. */ |
b46acd6a KK |
3849 | if (!rst_info2.restart || rst_info2.last_lsn <= rst_info.last_lsn) |
3850 | goto use_first_page; | |
3851 | ||
3852 | use_second_page = true; | |
3853 | ||
3854 | if (rst_info.chkdsk_was_run && page_size != rst_info.vbo) { | |
3855 | struct RECORD_PAGE_HDR *sp = NULL; | |
3856 | bool usa_error; | |
3857 | ||
3858 | if (!read_log_page(log, page_size, &sp, &usa_error) && | |
3859 | sp->rhdr.sign == NTFS_CHKD_SIGNATURE) { | |
3860 | use_second_page = false; | |
3861 | } | |
195c52bd | 3862 | kfree(sp); |
b46acd6a KK |
3863 | } |
3864 | ||
3865 | if (use_second_page) { | |
195c52bd | 3866 | kfree(rst_info.r_page); |
b46acd6a KK |
3867 | memcpy(&rst_info, &rst_info2, sizeof(struct restart_info)); |
3868 | rst_info2.r_page = NULL; | |
3869 | } | |
3870 | ||
3871 | use_first_page: | |
195c52bd | 3872 | kfree(rst_info2.r_page); |
b46acd6a KK |
3873 | |
3874 | check_restart_area: | |
e8b8e97f KA |
3875 | /* |
3876 | * If the restart area is at offset 0, we want | |
3877 | * to write the second restart area first. | |
3878 | */ | |
b46acd6a KK |
3879 | log->init_ra = !!rst_info.vbo; |
3880 | ||
e8b8e97f | 3881 | /* If we have a valid page then grab a pointer to the restart area. */ |
b46acd6a KK |
3882 | ra2 = rst_info.valid_page |
3883 | ? Add2Ptr(rst_info.r_page, | |
3884 | le16_to_cpu(rst_info.r_page->ra_off)) | |
3885 | : NULL; | |
3886 | ||
3887 | if (rst_info.chkdsk_was_run || | |
3888 | (ra2 && ra2->client_idx[1] == LFS_NO_CLIENT_LE)) { | |
3889 | bool wrapped = false; | |
3890 | bool use_multi_page = false; | |
3891 | u32 open_log_count; | |
3892 | ||
e8b8e97f | 3893 | /* Do some checks based on whether we have a valid log page. */ |
b46acd6a KK |
3894 | if (!rst_info.valid_page) { |
3895 | open_log_count = get_random_int(); | |
3896 | goto init_log_instance; | |
3897 | } | |
3898 | open_log_count = le32_to_cpu(ra2->open_log_count); | |
3899 | ||
3900 | /* | |
3901 | * If the restart page size isn't changing then we want to | |
e8b8e97f | 3902 | * check how much work we need to do. |
b46acd6a KK |
3903 | */ |
3904 | if (page_size != le32_to_cpu(rst_info.r_page->sys_page_size)) | |
3905 | goto init_log_instance; | |
3906 | ||
3907 | init_log_instance: | |
3908 | log_init_pg_hdr(log, page_size, page_size, 1, 1); | |
3909 | ||
3910 | log_create(log, l_size, rst_info.last_lsn, open_log_count, | |
3911 | wrapped, use_multi_page); | |
3912 | ||
3913 | ra = log_create_ra(log); | |
3914 | if (!ra) { | |
3915 | err = -ENOMEM; | |
3916 | goto out; | |
3917 | } | |
3918 | log->ra = ra; | |
3919 | ||
e8b8e97f KA |
3920 | /* Put the restart areas and initialize |
3921 | * the log file as required. | |
3922 | */ | |
b46acd6a KK |
3923 | goto process_log; |
3924 | } | |
3925 | ||
3926 | if (!ra2) { | |
3927 | err = -EINVAL; | |
3928 | goto out; | |
3929 | } | |
3930 | ||
3931 | /* | |
e8b8e97f KA |
3932 | * If the log page or the system page sizes have changed, we can't |
3933 | * use the log file. We must use the system page size instead of the | |
3934 | * default size if there is not a clean shutdown. | |
b46acd6a KK |
3935 | */ |
3936 | t32 = le32_to_cpu(rst_info.r_page->sys_page_size); | |
3937 | if (page_size != t32) { | |
3938 | l_size = orig_file_size; | |
3939 | page_size = | |
3940 | norm_file_page(t32, &l_size, t32 == DefaultLogPageSize); | |
3941 | } | |
3942 | ||
3943 | if (page_size != t32 || | |
3944 | page_size != le32_to_cpu(rst_info.r_page->page_size)) { | |
3945 | err = -EINVAL; | |
3946 | goto out; | |
3947 | } | |
3948 | ||
e8b8e97f | 3949 | /* If the file size has shrunk then we won't mount it. */ |
b46acd6a KK |
3950 | if (l_size < le64_to_cpu(ra2->l_size)) { |
3951 | err = -EINVAL; | |
3952 | goto out; | |
3953 | } | |
3954 | ||
3955 | log_init_pg_hdr(log, page_size, page_size, | |
3956 | le16_to_cpu(rst_info.r_page->major_ver), | |
3957 | le16_to_cpu(rst_info.r_page->minor_ver)); | |
3958 | ||
3959 | log->l_size = le64_to_cpu(ra2->l_size); | |
3960 | log->seq_num_bits = le32_to_cpu(ra2->seq_num_bits); | |
3961 | log->file_data_bits = sizeof(u64) * 8 - log->seq_num_bits; | |
3962 | log->seq_num_mask = (8 << log->file_data_bits) - 1; | |
3963 | log->last_lsn = le64_to_cpu(ra2->current_lsn); | |
3964 | log->seq_num = log->last_lsn >> log->file_data_bits; | |
3965 | log->ra_off = le16_to_cpu(rst_info.r_page->ra_off); | |
3966 | log->restart_size = log->sys_page_size - log->ra_off; | |
3967 | log->record_header_len = le16_to_cpu(ra2->rec_hdr_len); | |
3968 | log->ra_size = le16_to_cpu(ra2->ra_len); | |
3969 | log->data_off = le16_to_cpu(ra2->data_off); | |
3970 | log->data_size = log->page_size - log->data_off; | |
3971 | log->reserved = log->data_size - log->record_header_len; | |
3972 | ||
3973 | vbo = lsn_to_vbo(log, log->last_lsn); | |
3974 | ||
3975 | if (vbo < log->first_page) { | |
e8b8e97f | 3976 | /* This is a pseudo lsn. */ |
b46acd6a KK |
3977 | log->l_flags |= NTFSLOG_NO_LAST_LSN; |
3978 | log->next_page = log->first_page; | |
3979 | goto find_oldest; | |
3980 | } | |
3981 | ||
e8b8e97f | 3982 | /* Find the end of this log record. */ |
b46acd6a KK |
3983 | off = final_log_off(log, log->last_lsn, |
3984 | le32_to_cpu(ra2->last_lsn_data_len)); | |
3985 | ||
e8b8e97f | 3986 | /* If we wrapped the file then increment the sequence number. */ |
b46acd6a KK |
3987 | if (off <= vbo) { |
3988 | log->seq_num += 1; | |
3989 | log->l_flags |= NTFSLOG_WRAPPED; | |
3990 | } | |
3991 | ||
e8b8e97f | 3992 | /* Now compute the next log page to use. */ |
b46acd6a KK |
3993 | vbo &= ~log->sys_page_mask; |
3994 | tail = log->page_size - (off & log->page_mask) - 1; | |
3995 | ||
e8b8e97f KA |
3996 | /* |
3997 | *If we can fit another log record on the page, | |
3998 | * move back a page the log file. | |
3999 | */ | |
b46acd6a KK |
4000 | if (tail >= log->record_header_len) { |
4001 | log->l_flags |= NTFSLOG_REUSE_TAIL; | |
4002 | log->next_page = vbo; | |
4003 | } else { | |
4004 | log->next_page = next_page_off(log, vbo); | |
4005 | } | |
4006 | ||
4007 | find_oldest: | |
e8b8e97f KA |
4008 | /* |
4009 | * Find the oldest client lsn. Use the last | |
4010 | * flushed lsn as a starting point. | |
4011 | */ | |
b46acd6a KK |
4012 | log->oldest_lsn = log->last_lsn; |
4013 | oldest_client_lsn(Add2Ptr(ra2, le16_to_cpu(ra2->client_off)), | |
4014 | ra2->client_idx[1], &log->oldest_lsn); | |
4015 | log->oldest_lsn_off = lsn_to_vbo(log, log->oldest_lsn); | |
4016 | ||
4017 | if (log->oldest_lsn_off < log->first_page) | |
4018 | log->l_flags |= NTFSLOG_NO_OLDEST_LSN; | |
4019 | ||
4020 | if (!(ra2->flags & RESTART_SINGLE_PAGE_IO)) | |
4021 | log->l_flags |= NTFSLOG_WRAPPED | NTFSLOG_MULTIPLE_PAGE_IO; | |
4022 | ||
4023 | log->current_openlog_count = le32_to_cpu(ra2->open_log_count); | |
4024 | log->total_avail_pages = log->l_size - log->first_page; | |
4025 | log->total_avail = log->total_avail_pages >> log->page_bits; | |
4026 | log->max_current_avail = log->total_avail * log->reserved; | |
4027 | log->total_avail = log->total_avail * log->data_size; | |
4028 | ||
4029 | log->current_avail = current_log_avail(log); | |
4030 | ||
195c52bd | 4031 | ra = kzalloc(log->restart_size, GFP_NOFS); |
b46acd6a KK |
4032 | if (!ra) { |
4033 | err = -ENOMEM; | |
4034 | goto out; | |
4035 | } | |
4036 | log->ra = ra; | |
4037 | ||
4038 | t16 = le16_to_cpu(ra2->client_off); | |
4039 | if (t16 == offsetof(struct RESTART_AREA, clients)) { | |
4040 | memcpy(ra, ra2, log->ra_size); | |
4041 | } else { | |
4042 | memcpy(ra, ra2, offsetof(struct RESTART_AREA, clients)); | |
4043 | memcpy(ra->clients, Add2Ptr(ra2, t16), | |
4044 | le16_to_cpu(ra2->ra_len) - t16); | |
4045 | ||
4046 | log->current_openlog_count = get_random_int(); | |
4047 | ra->open_log_count = cpu_to_le32(log->current_openlog_count); | |
4048 | log->ra_size = offsetof(struct RESTART_AREA, clients) + | |
4049 | sizeof(struct CLIENT_REC); | |
4050 | ra->client_off = | |
4051 | cpu_to_le16(offsetof(struct RESTART_AREA, clients)); | |
4052 | ra->ra_len = cpu_to_le16(log->ra_size); | |
4053 | } | |
4054 | ||
4055 | le32_add_cpu(&ra->open_log_count, 1); | |
4056 | ||
e8b8e97f | 4057 | /* Now we need to walk through looking for the last lsn. */ |
b46acd6a KK |
4058 | err = last_log_lsn(log); |
4059 | if (err) | |
4060 | goto out; | |
4061 | ||
4062 | log->current_avail = current_log_avail(log); | |
4063 | ||
e8b8e97f | 4064 | /* Remember which restart area to write first. */ |
b46acd6a KK |
4065 | log->init_ra = rst_info.vbo; |
4066 | ||
4067 | process_log: | |
e8b8e97f | 4068 | /* 1.0, 1.1, 2.0 log->major_ver/minor_ver - short values. */ |
b46acd6a KK |
4069 | switch ((log->major_ver << 16) + log->minor_ver) { |
4070 | case 0x10000: | |
4071 | case 0x10001: | |
4072 | case 0x20000: | |
4073 | break; | |
4074 | default: | |
4075 | ntfs_warn(sbi->sb, "\x24LogFile version %d.%d is not supported", | |
4076 | log->major_ver, log->minor_ver); | |
4077 | err = -EOPNOTSUPP; | |
4078 | log->set_dirty = true; | |
4079 | goto out; | |
4080 | } | |
4081 | ||
e8b8e97f | 4082 | /* One client "NTFS" per logfile. */ |
b46acd6a KK |
4083 | ca = Add2Ptr(ra, le16_to_cpu(ra->client_off)); |
4084 | ||
4085 | for (client = ra->client_idx[1];; client = cr->next_client) { | |
4086 | if (client == LFS_NO_CLIENT_LE) { | |
e8b8e97f | 4087 | /* Insert "NTFS" client LogFile. */ |
b46acd6a KK |
4088 | client = ra->client_idx[0]; |
4089 | if (client == LFS_NO_CLIENT_LE) | |
4090 | return -EINVAL; | |
4091 | ||
4092 | t16 = le16_to_cpu(client); | |
4093 | cr = ca + t16; | |
4094 | ||
4095 | remove_client(ca, cr, &ra->client_idx[0]); | |
4096 | ||
4097 | cr->restart_lsn = 0; | |
4098 | cr->oldest_lsn = cpu_to_le64(log->oldest_lsn); | |
4099 | cr->name_bytes = cpu_to_le32(8); | |
4100 | cr->name[0] = cpu_to_le16('N'); | |
4101 | cr->name[1] = cpu_to_le16('T'); | |
4102 | cr->name[2] = cpu_to_le16('F'); | |
4103 | cr->name[3] = cpu_to_le16('S'); | |
4104 | ||
4105 | add_client(ca, t16, &ra->client_idx[1]); | |
4106 | break; | |
4107 | } | |
4108 | ||
4109 | cr = ca + le16_to_cpu(client); | |
4110 | ||
4111 | if (cpu_to_le32(8) == cr->name_bytes && | |
4112 | cpu_to_le16('N') == cr->name[0] && | |
4113 | cpu_to_le16('T') == cr->name[1] && | |
4114 | cpu_to_le16('F') == cr->name[2] && | |
4115 | cpu_to_le16('S') == cr->name[3]) | |
4116 | break; | |
4117 | } | |
4118 | ||
e8b8e97f | 4119 | /* Update the client handle with the client block information. */ |
b46acd6a KK |
4120 | log->client_id.seq_num = cr->seq_num; |
4121 | log->client_id.client_idx = client; | |
4122 | ||
4123 | err = read_rst_area(log, &rst, &ra_lsn); | |
4124 | if (err) | |
4125 | goto out; | |
4126 | ||
4127 | if (!rst) | |
4128 | goto out; | |
4129 | ||
4130 | bytes_per_attr_entry = !rst->major_ver ? 0x2C : 0x28; | |
4131 | ||
4132 | checkpt_lsn = le64_to_cpu(rst->check_point_start); | |
4133 | if (!checkpt_lsn) | |
4134 | checkpt_lsn = ra_lsn; | |
4135 | ||
e8b8e97f | 4136 | /* Allocate and Read the Transaction Table. */ |
b46acd6a KK |
4137 | if (!rst->transact_table_len) |
4138 | goto check_dirty_page_table; | |
4139 | ||
4140 | t64 = le64_to_cpu(rst->transact_table_lsn); | |
4141 | err = read_log_rec_lcb(log, t64, lcb_ctx_prev, &lcb); | |
4142 | if (err) | |
4143 | goto out; | |
4144 | ||
4145 | lrh = lcb->log_rec; | |
4146 | frh = lcb->lrh; | |
4147 | rec_len = le32_to_cpu(frh->client_data_len); | |
4148 | ||
4149 | if (!check_log_rec(lrh, rec_len, le32_to_cpu(frh->transact_id), | |
4150 | bytes_per_attr_entry)) { | |
4151 | err = -EINVAL; | |
4152 | goto out; | |
4153 | } | |
4154 | ||
4155 | t16 = le16_to_cpu(lrh->redo_off); | |
4156 | ||
4157 | rt = Add2Ptr(lrh, t16); | |
4158 | t32 = rec_len - t16; | |
4159 | ||
e8b8e97f | 4160 | /* Now check that this is a valid restart table. */ |
b46acd6a KK |
4161 | if (!check_rstbl(rt, t32)) { |
4162 | err = -EINVAL; | |
4163 | goto out; | |
4164 | } | |
4165 | ||
195c52bd | 4166 | trtbl = kmemdup(rt, t32, GFP_NOFS); |
b46acd6a KK |
4167 | if (!trtbl) { |
4168 | err = -ENOMEM; | |
4169 | goto out; | |
4170 | } | |
4171 | ||
4172 | lcb_put(lcb); | |
4173 | lcb = NULL; | |
4174 | ||
4175 | check_dirty_page_table: | |
e8b8e97f | 4176 | /* The next record back should be the Dirty Pages Table. */ |
b46acd6a KK |
4177 | if (!rst->dirty_pages_len) |
4178 | goto check_attribute_names; | |
4179 | ||
4180 | t64 = le64_to_cpu(rst->dirty_pages_table_lsn); | |
4181 | err = read_log_rec_lcb(log, t64, lcb_ctx_prev, &lcb); | |
4182 | if (err) | |
4183 | goto out; | |
4184 | ||
4185 | lrh = lcb->log_rec; | |
4186 | frh = lcb->lrh; | |
4187 | rec_len = le32_to_cpu(frh->client_data_len); | |
4188 | ||
4189 | if (!check_log_rec(lrh, rec_len, le32_to_cpu(frh->transact_id), | |
4190 | bytes_per_attr_entry)) { | |
4191 | err = -EINVAL; | |
4192 | goto out; | |
4193 | } | |
4194 | ||
4195 | t16 = le16_to_cpu(lrh->redo_off); | |
4196 | ||
4197 | rt = Add2Ptr(lrh, t16); | |
4198 | t32 = rec_len - t16; | |
4199 | ||
e8b8e97f | 4200 | /* Now check that this is a valid restart table. */ |
b46acd6a KK |
4201 | if (!check_rstbl(rt, t32)) { |
4202 | err = -EINVAL; | |
4203 | goto out; | |
4204 | } | |
4205 | ||
195c52bd | 4206 | dptbl = kmemdup(rt, t32, GFP_NOFS); |
b46acd6a KK |
4207 | if (!dptbl) { |
4208 | err = -ENOMEM; | |
4209 | goto out; | |
4210 | } | |
4211 | ||
e8b8e97f | 4212 | /* Convert Ra version '0' into version '1'. */ |
b46acd6a KK |
4213 | if (rst->major_ver) |
4214 | goto end_conv_1; | |
4215 | ||
4216 | dp = NULL; | |
4217 | while ((dp = enum_rstbl(dptbl, dp))) { | |
4218 | struct DIR_PAGE_ENTRY_32 *dp0 = (struct DIR_PAGE_ENTRY_32 *)dp; | |
e8b8e97f | 4219 | // NOTE: Danger. Check for of boundary. |
b46acd6a KK |
4220 | memmove(&dp->vcn, &dp0->vcn_low, |
4221 | 2 * sizeof(u64) + | |
4222 | le32_to_cpu(dp->lcns_follow) * sizeof(u64)); | |
4223 | } | |
4224 | ||
4225 | end_conv_1: | |
4226 | lcb_put(lcb); | |
4227 | lcb = NULL; | |
4228 | ||
e8b8e97f KA |
4229 | /* |
4230 | * Go through the table and remove the duplicates, | |
4231 | * remembering the oldest lsn values. | |
4232 | */ | |
b46acd6a KK |
4233 | if (sbi->cluster_size <= log->page_size) |
4234 | goto trace_dp_table; | |
4235 | ||
4236 | dp = NULL; | |
4237 | while ((dp = enum_rstbl(dptbl, dp))) { | |
4238 | struct DIR_PAGE_ENTRY *next = dp; | |
4239 | ||
4240 | while ((next = enum_rstbl(dptbl, next))) { | |
4241 | if (next->target_attr == dp->target_attr && | |
4242 | next->vcn == dp->vcn) { | |
4243 | if (le64_to_cpu(next->oldest_lsn) < | |
4244 | le64_to_cpu(dp->oldest_lsn)) { | |
4245 | dp->oldest_lsn = next->oldest_lsn; | |
4246 | } | |
4247 | ||
4248 | free_rsttbl_idx(dptbl, PtrOffset(dptbl, next)); | |
4249 | } | |
4250 | } | |
4251 | } | |
4252 | trace_dp_table: | |
4253 | check_attribute_names: | |
e8b8e97f | 4254 | /* The next record should be the Attribute Names. */ |
b46acd6a KK |
4255 | if (!rst->attr_names_len) |
4256 | goto check_attr_table; | |
4257 | ||
4258 | t64 = le64_to_cpu(rst->attr_names_lsn); | |
4259 | err = read_log_rec_lcb(log, t64, lcb_ctx_prev, &lcb); | |
4260 | if (err) | |
4261 | goto out; | |
4262 | ||
4263 | lrh = lcb->log_rec; | |
4264 | frh = lcb->lrh; | |
4265 | rec_len = le32_to_cpu(frh->client_data_len); | |
4266 | ||
4267 | if (!check_log_rec(lrh, rec_len, le32_to_cpu(frh->transact_id), | |
4268 | bytes_per_attr_entry)) { | |
4269 | err = -EINVAL; | |
4270 | goto out; | |
4271 | } | |
4272 | ||
4273 | t32 = lrh_length(lrh); | |
4274 | rec_len -= t32; | |
4275 | ||
195c52bd | 4276 | attr_names = kmemdup(Add2Ptr(lrh, t32), rec_len, GFP_NOFS); |
b46acd6a KK |
4277 | |
4278 | lcb_put(lcb); | |
4279 | lcb = NULL; | |
4280 | ||
4281 | check_attr_table: | |
e8b8e97f | 4282 | /* The next record should be the attribute Table. */ |
b46acd6a KK |
4283 | if (!rst->open_attr_len) |
4284 | goto check_attribute_names2; | |
4285 | ||
4286 | t64 = le64_to_cpu(rst->open_attr_table_lsn); | |
4287 | err = read_log_rec_lcb(log, t64, lcb_ctx_prev, &lcb); | |
4288 | if (err) | |
4289 | goto out; | |
4290 | ||
4291 | lrh = lcb->log_rec; | |
4292 | frh = lcb->lrh; | |
4293 | rec_len = le32_to_cpu(frh->client_data_len); | |
4294 | ||
4295 | if (!check_log_rec(lrh, rec_len, le32_to_cpu(frh->transact_id), | |
4296 | bytes_per_attr_entry)) { | |
4297 | err = -EINVAL; | |
4298 | goto out; | |
4299 | } | |
4300 | ||
4301 | t16 = le16_to_cpu(lrh->redo_off); | |
4302 | ||
4303 | rt = Add2Ptr(lrh, t16); | |
4304 | t32 = rec_len - t16; | |
4305 | ||
4306 | if (!check_rstbl(rt, t32)) { | |
4307 | err = -EINVAL; | |
4308 | goto out; | |
4309 | } | |
4310 | ||
195c52bd | 4311 | oatbl = kmemdup(rt, t32, GFP_NOFS); |
b46acd6a KK |
4312 | if (!oatbl) { |
4313 | err = -ENOMEM; | |
4314 | goto out; | |
4315 | } | |
4316 | ||
4317 | log->open_attr_tbl = oatbl; | |
4318 | ||
e8b8e97f | 4319 | /* Clear all of the Attr pointers. */ |
b46acd6a KK |
4320 | oe = NULL; |
4321 | while ((oe = enum_rstbl(oatbl, oe))) { | |
4322 | if (!rst->major_ver) { | |
4323 | struct OPEN_ATTR_ENRTY_32 oe0; | |
4324 | ||
e8b8e97f | 4325 | /* Really 'oe' points to OPEN_ATTR_ENRTY_32. */ |
b46acd6a KK |
4326 | memcpy(&oe0, oe, SIZEOF_OPENATTRIBUTEENTRY0); |
4327 | ||
4328 | oe->bytes_per_index = oe0.bytes_per_index; | |
4329 | oe->type = oe0.type; | |
4330 | oe->is_dirty_pages = oe0.is_dirty_pages; | |
4331 | oe->name_len = 0; | |
4332 | oe->ref = oe0.ref; | |
4333 | oe->open_record_lsn = oe0.open_record_lsn; | |
4334 | } | |
4335 | ||
4336 | oe->is_attr_name = 0; | |
4337 | oe->ptr = NULL; | |
4338 | } | |
4339 | ||
4340 | lcb_put(lcb); | |
4341 | lcb = NULL; | |
4342 | ||
4343 | check_attribute_names2: | |
4344 | if (!rst->attr_names_len) | |
4345 | goto trace_attribute_table; | |
4346 | ||
4347 | ane = attr_names; | |
4348 | if (!oatbl) | |
4349 | goto trace_attribute_table; | |
4350 | while (ane->off) { | |
4351 | /* TODO: Clear table on exit! */ | |
4352 | oe = Add2Ptr(oatbl, le16_to_cpu(ane->off)); | |
4353 | t16 = le16_to_cpu(ane->name_bytes); | |
4354 | oe->name_len = t16 / sizeof(short); | |
4355 | oe->ptr = ane->name; | |
4356 | oe->is_attr_name = 2; | |
4357 | ane = Add2Ptr(ane, sizeof(struct ATTR_NAME_ENTRY) + t16); | |
4358 | } | |
4359 | ||
4360 | trace_attribute_table: | |
4361 | /* | |
4362 | * If the checkpt_lsn is zero, then this is a freshly | |
e8b8e97f | 4363 | * formatted disk and we have no work to do. |
b46acd6a KK |
4364 | */ |
4365 | if (!checkpt_lsn) { | |
4366 | err = 0; | |
4367 | goto out; | |
4368 | } | |
4369 | ||
4370 | if (!oatbl) { | |
4371 | oatbl = init_rsttbl(bytes_per_attr_entry, 8); | |
4372 | if (!oatbl) { | |
4373 | err = -ENOMEM; | |
4374 | goto out; | |
4375 | } | |
4376 | } | |
4377 | ||
4378 | log->open_attr_tbl = oatbl; | |
4379 | ||
4380 | /* Start the analysis pass from the Checkpoint lsn. */ | |
4381 | rec_lsn = checkpt_lsn; | |
4382 | ||
e8b8e97f | 4383 | /* Read the first lsn. */ |
b46acd6a KK |
4384 | err = read_log_rec_lcb(log, checkpt_lsn, lcb_ctx_next, &lcb); |
4385 | if (err) | |
4386 | goto out; | |
4387 | ||
e8b8e97f | 4388 | /* Loop to read all subsequent records to the end of the log file. */ |
b46acd6a KK |
4389 | next_log_record_analyze: |
4390 | err = read_next_log_rec(log, lcb, &rec_lsn); | |
4391 | if (err) | |
4392 | goto out; | |
4393 | ||
4394 | if (!rec_lsn) | |
4395 | goto end_log_records_enumerate; | |
4396 | ||
4397 | frh = lcb->lrh; | |
4398 | transact_id = le32_to_cpu(frh->transact_id); | |
4399 | rec_len = le32_to_cpu(frh->client_data_len); | |
4400 | lrh = lcb->log_rec; | |
4401 | ||
4402 | if (!check_log_rec(lrh, rec_len, transact_id, bytes_per_attr_entry)) { | |
4403 | err = -EINVAL; | |
4404 | goto out; | |
4405 | } | |
4406 | ||
4407 | /* | |
4408 | * The first lsn after the previous lsn remembered | |
e8b8e97f | 4409 | * the checkpoint is the first candidate for the rlsn. |
b46acd6a KK |
4410 | */ |
4411 | if (!rlsn) | |
4412 | rlsn = rec_lsn; | |
4413 | ||
4414 | if (LfsClientRecord != frh->record_type) | |
4415 | goto next_log_record_analyze; | |
4416 | ||
4417 | /* | |
e8b8e97f KA |
4418 | * Now update the Transaction Table for this transaction. If there |
4419 | * is no entry present or it is unallocated we allocate the entry. | |
b46acd6a KK |
4420 | */ |
4421 | if (!trtbl) { | |
4422 | trtbl = init_rsttbl(sizeof(struct TRANSACTION_ENTRY), | |
4423 | INITIAL_NUMBER_TRANSACTIONS); | |
4424 | if (!trtbl) { | |
4425 | err = -ENOMEM; | |
4426 | goto out; | |
4427 | } | |
4428 | } | |
4429 | ||
4430 | tr = Add2Ptr(trtbl, transact_id); | |
4431 | ||
4432 | if (transact_id >= bytes_per_rt(trtbl) || | |
4433 | tr->next != RESTART_ENTRY_ALLOCATED_LE) { | |
4434 | tr = alloc_rsttbl_from_idx(&trtbl, transact_id); | |
4435 | if (!tr) { | |
4436 | err = -ENOMEM; | |
4437 | goto out; | |
4438 | } | |
4439 | tr->transact_state = TransactionActive; | |
4440 | tr->first_lsn = cpu_to_le64(rec_lsn); | |
4441 | } | |
4442 | ||
4443 | tr->prev_lsn = tr->undo_next_lsn = cpu_to_le64(rec_lsn); | |
4444 | ||
4445 | /* | |
4446 | * If this is a compensation log record, then change | |
e8b8e97f | 4447 | * the undo_next_lsn to be the undo_next_lsn of this record. |
b46acd6a KK |
4448 | */ |
4449 | if (lrh->undo_op == cpu_to_le16(CompensationLogRecord)) | |
4450 | tr->undo_next_lsn = frh->client_undo_next_lsn; | |
4451 | ||
e8b8e97f | 4452 | /* Dispatch to handle log record depending on type. */ |
b46acd6a KK |
4453 | switch (le16_to_cpu(lrh->redo_op)) { |
4454 | case InitializeFileRecordSegment: | |
4455 | case DeallocateFileRecordSegment: | |
4456 | case WriteEndOfFileRecordSegment: | |
4457 | case CreateAttribute: | |
4458 | case DeleteAttribute: | |
4459 | case UpdateResidentValue: | |
4460 | case UpdateNonresidentValue: | |
4461 | case UpdateMappingPairs: | |
4462 | case SetNewAttributeSizes: | |
4463 | case AddIndexEntryRoot: | |
4464 | case DeleteIndexEntryRoot: | |
4465 | case AddIndexEntryAllocation: | |
4466 | case DeleteIndexEntryAllocation: | |
4467 | case WriteEndOfIndexBuffer: | |
4468 | case SetIndexEntryVcnRoot: | |
4469 | case SetIndexEntryVcnAllocation: | |
4470 | case UpdateFileNameRoot: | |
4471 | case UpdateFileNameAllocation: | |
4472 | case SetBitsInNonresidentBitMap: | |
4473 | case ClearBitsInNonresidentBitMap: | |
4474 | case UpdateRecordDataRoot: | |
4475 | case UpdateRecordDataAllocation: | |
4476 | case ZeroEndOfFileRecord: | |
4477 | t16 = le16_to_cpu(lrh->target_attr); | |
4478 | t64 = le64_to_cpu(lrh->target_vcn); | |
4479 | dp = find_dp(dptbl, t16, t64); | |
4480 | ||
4481 | if (dp) | |
4482 | goto copy_lcns; | |
4483 | ||
4484 | /* | |
4485 | * Calculate the number of clusters per page the system | |
e8b8e97f | 4486 | * which wrote the checkpoint, possibly creating the table. |
b46acd6a KK |
4487 | */ |
4488 | if (dptbl) { | |
4489 | t32 = (le16_to_cpu(dptbl->size) - | |
4490 | sizeof(struct DIR_PAGE_ENTRY)) / | |
4491 | sizeof(u64); | |
4492 | } else { | |
4493 | t32 = log->clst_per_page; | |
195c52bd | 4494 | kfree(dptbl); |
b46acd6a KK |
4495 | dptbl = init_rsttbl(struct_size(dp, page_lcns, t32), |
4496 | 32); | |
4497 | if (!dptbl) { | |
4498 | err = -ENOMEM; | |
4499 | goto out; | |
4500 | } | |
4501 | } | |
4502 | ||
4503 | dp = alloc_rsttbl_idx(&dptbl); | |
a1b04d38 DC |
4504 | if (!dp) { |
4505 | err = -ENOMEM; | |
4506 | goto out; | |
4507 | } | |
b46acd6a KK |
4508 | dp->target_attr = cpu_to_le32(t16); |
4509 | dp->transfer_len = cpu_to_le32(t32 << sbi->cluster_bits); | |
4510 | dp->lcns_follow = cpu_to_le32(t32); | |
4511 | dp->vcn = cpu_to_le64(t64 & ~((u64)t32 - 1)); | |
4512 | dp->oldest_lsn = cpu_to_le64(rec_lsn); | |
4513 | ||
4514 | copy_lcns: | |
4515 | /* | |
e8b8e97f KA |
4516 | * Copy the Lcns from the log record into the Dirty Page Entry. |
4517 | * TODO: For different page size support, must somehow make | |
4518 | * whole routine a loop, case Lcns do not fit below. | |
b46acd6a KK |
4519 | */ |
4520 | t16 = le16_to_cpu(lrh->lcns_follow); | |
4521 | for (i = 0; i < t16; i++) { | |
4522 | size_t j = (size_t)(le64_to_cpu(lrh->target_vcn) - | |
4523 | le64_to_cpu(dp->vcn)); | |
4524 | dp->page_lcns[j + i] = lrh->page_lcns[i]; | |
4525 | } | |
4526 | ||
4527 | goto next_log_record_analyze; | |
4528 | ||
4529 | case DeleteDirtyClusters: { | |
4530 | u32 range_count = | |
4531 | le16_to_cpu(lrh->redo_len) / sizeof(struct LCN_RANGE); | |
4532 | const struct LCN_RANGE *r = | |
4533 | Add2Ptr(lrh, le16_to_cpu(lrh->redo_off)); | |
4534 | ||
e8b8e97f | 4535 | /* Loop through all of the Lcn ranges this log record. */ |
b46acd6a KK |
4536 | for (i = 0; i < range_count; i++, r++) { |
4537 | u64 lcn0 = le64_to_cpu(r->lcn); | |
4538 | u64 lcn_e = lcn0 + le64_to_cpu(r->len) - 1; | |
4539 | ||
4540 | dp = NULL; | |
4541 | while ((dp = enum_rstbl(dptbl, dp))) { | |
4542 | u32 j; | |
4543 | ||
4544 | t32 = le32_to_cpu(dp->lcns_follow); | |
4545 | for (j = 0; j < t32; j++) { | |
4546 | t64 = le64_to_cpu(dp->page_lcns[j]); | |
4547 | if (t64 >= lcn0 && t64 <= lcn_e) | |
4548 | dp->page_lcns[j] = 0; | |
4549 | } | |
4550 | } | |
4551 | } | |
4552 | goto next_log_record_analyze; | |
4553 | ; | |
4554 | } | |
4555 | ||
4556 | case OpenNonresidentAttribute: | |
4557 | t16 = le16_to_cpu(lrh->target_attr); | |
4558 | if (t16 >= bytes_per_rt(oatbl)) { | |
4559 | /* | |
4560 | * Compute how big the table needs to be. | |
e8b8e97f | 4561 | * Add 10 extra entries for some cushion. |
b46acd6a KK |
4562 | */ |
4563 | u32 new_e = t16 / le16_to_cpu(oatbl->size); | |
4564 | ||
4565 | new_e += 10 - le16_to_cpu(oatbl->used); | |
4566 | ||
4567 | oatbl = extend_rsttbl(oatbl, new_e, ~0u); | |
4568 | log->open_attr_tbl = oatbl; | |
4569 | if (!oatbl) { | |
4570 | err = -ENOMEM; | |
4571 | goto out; | |
4572 | } | |
4573 | } | |
4574 | ||
e8b8e97f | 4575 | /* Point to the entry being opened. */ |
b46acd6a KK |
4576 | oe = alloc_rsttbl_from_idx(&oatbl, t16); |
4577 | log->open_attr_tbl = oatbl; | |
4578 | if (!oe) { | |
4579 | err = -ENOMEM; | |
4580 | goto out; | |
4581 | } | |
4582 | ||
e8b8e97f | 4583 | /* Initialize this entry from the log record. */ |
b46acd6a KK |
4584 | t16 = le16_to_cpu(lrh->redo_off); |
4585 | if (!rst->major_ver) { | |
e8b8e97f | 4586 | /* Convert version '0' into version '1'. */ |
b46acd6a KK |
4587 | struct OPEN_ATTR_ENRTY_32 *oe0 = Add2Ptr(lrh, t16); |
4588 | ||
4589 | oe->bytes_per_index = oe0->bytes_per_index; | |
4590 | oe->type = oe0->type; | |
4591 | oe->is_dirty_pages = oe0->is_dirty_pages; | |
4592 | oe->name_len = 0; //oe0.name_len; | |
4593 | oe->ref = oe0->ref; | |
4594 | oe->open_record_lsn = oe0->open_record_lsn; | |
4595 | } else { | |
4596 | memcpy(oe, Add2Ptr(lrh, t16), bytes_per_attr_entry); | |
4597 | } | |
4598 | ||
4599 | t16 = le16_to_cpu(lrh->undo_len); | |
4600 | if (t16) { | |
195c52bd | 4601 | oe->ptr = kmalloc(t16, GFP_NOFS); |
b46acd6a KK |
4602 | if (!oe->ptr) { |
4603 | err = -ENOMEM; | |
4604 | goto out; | |
4605 | } | |
4606 | oe->name_len = t16 / sizeof(short); | |
4607 | memcpy(oe->ptr, | |
4608 | Add2Ptr(lrh, le16_to_cpu(lrh->undo_off)), t16); | |
4609 | oe->is_attr_name = 1; | |
4610 | } else { | |
4611 | oe->ptr = NULL; | |
4612 | oe->is_attr_name = 0; | |
4613 | } | |
4614 | ||
4615 | goto next_log_record_analyze; | |
4616 | ||
4617 | case HotFix: | |
4618 | t16 = le16_to_cpu(lrh->target_attr); | |
4619 | t64 = le64_to_cpu(lrh->target_vcn); | |
4620 | dp = find_dp(dptbl, t16, t64); | |
4621 | if (dp) { | |
4622 | size_t j = le64_to_cpu(lrh->target_vcn) - | |
4623 | le64_to_cpu(dp->vcn); | |
4624 | if (dp->page_lcns[j]) | |
4625 | dp->page_lcns[j] = lrh->page_lcns[0]; | |
4626 | } | |
4627 | goto next_log_record_analyze; | |
4628 | ||
4629 | case EndTopLevelAction: | |
4630 | tr = Add2Ptr(trtbl, transact_id); | |
4631 | tr->prev_lsn = cpu_to_le64(rec_lsn); | |
4632 | tr->undo_next_lsn = frh->client_undo_next_lsn; | |
4633 | goto next_log_record_analyze; | |
4634 | ||
4635 | case PrepareTransaction: | |
4636 | tr = Add2Ptr(trtbl, transact_id); | |
4637 | tr->transact_state = TransactionPrepared; | |
4638 | goto next_log_record_analyze; | |
4639 | ||
4640 | case CommitTransaction: | |
4641 | tr = Add2Ptr(trtbl, transact_id); | |
4642 | tr->transact_state = TransactionCommitted; | |
4643 | goto next_log_record_analyze; | |
4644 | ||
4645 | case ForgetTransaction: | |
4646 | free_rsttbl_idx(trtbl, transact_id); | |
4647 | goto next_log_record_analyze; | |
4648 | ||
4649 | case Noop: | |
4650 | case OpenAttributeTableDump: | |
4651 | case AttributeNamesDump: | |
4652 | case DirtyPageTableDump: | |
4653 | case TransactionTableDump: | |
e8b8e97f | 4654 | /* The following cases require no action the Analysis Pass. */ |
b46acd6a KK |
4655 | goto next_log_record_analyze; |
4656 | ||
4657 | default: | |
4658 | /* | |
4659 | * All codes will be explicitly handled. | |
e8b8e97f | 4660 | * If we see a code we do not expect, then we are trouble. |
b46acd6a KK |
4661 | */ |
4662 | goto next_log_record_analyze; | |
4663 | } | |
4664 | ||
4665 | end_log_records_enumerate: | |
4666 | lcb_put(lcb); | |
4667 | lcb = NULL; | |
4668 | ||
4669 | /* | |
4670 | * Scan the Dirty Page Table and Transaction Table for | |
e8b8e97f | 4671 | * the lowest lsn, and return it as the Redo lsn. |
b46acd6a KK |
4672 | */ |
4673 | dp = NULL; | |
4674 | while ((dp = enum_rstbl(dptbl, dp))) { | |
4675 | t64 = le64_to_cpu(dp->oldest_lsn); | |
4676 | if (t64 && t64 < rlsn) | |
4677 | rlsn = t64; | |
4678 | } | |
4679 | ||
4680 | tr = NULL; | |
4681 | while ((tr = enum_rstbl(trtbl, tr))) { | |
4682 | t64 = le64_to_cpu(tr->first_lsn); | |
4683 | if (t64 && t64 < rlsn) | |
4684 | rlsn = t64; | |
4685 | } | |
4686 | ||
e8b8e97f KA |
4687 | /* |
4688 | * Only proceed if the Dirty Page Table or Transaction | |
4689 | * table are not empty. | |
4690 | */ | |
b46acd6a KK |
4691 | if ((!dptbl || !dptbl->total) && (!trtbl || !trtbl->total)) |
4692 | goto end_reply; | |
4693 | ||
4694 | sbi->flags |= NTFS_FLAGS_NEED_REPLAY; | |
4695 | if (is_ro) | |
4696 | goto out; | |
4697 | ||
e8b8e97f | 4698 | /* Reopen all of the attributes with dirty pages. */ |
b46acd6a KK |
4699 | oe = NULL; |
4700 | next_open_attribute: | |
4701 | ||
4702 | oe = enum_rstbl(oatbl, oe); | |
4703 | if (!oe) { | |
4704 | err = 0; | |
4705 | dp = NULL; | |
4706 | goto next_dirty_page; | |
4707 | } | |
4708 | ||
195c52bd | 4709 | oa = kzalloc(sizeof(struct OpenAttr), GFP_NOFS); |
b46acd6a KK |
4710 | if (!oa) { |
4711 | err = -ENOMEM; | |
4712 | goto out; | |
4713 | } | |
4714 | ||
4715 | inode = ntfs_iget5(sbi->sb, &oe->ref, NULL); | |
4716 | if (IS_ERR(inode)) | |
4717 | goto fake_attr; | |
4718 | ||
4719 | if (is_bad_inode(inode)) { | |
4720 | iput(inode); | |
4721 | fake_attr: | |
4722 | if (oa->ni) { | |
4723 | iput(&oa->ni->vfs_inode); | |
4724 | oa->ni = NULL; | |
4725 | } | |
4726 | ||
4727 | attr = attr_create_nonres_log(sbi, oe->type, 0, oe->ptr, | |
4728 | oe->name_len, 0); | |
4729 | if (!attr) { | |
195c52bd | 4730 | kfree(oa); |
b46acd6a KK |
4731 | err = -ENOMEM; |
4732 | goto out; | |
4733 | } | |
4734 | oa->attr = attr; | |
4735 | oa->run1 = &oa->run0; | |
4736 | goto final_oe; | |
4737 | } | |
4738 | ||
4739 | ni_oe = ntfs_i(inode); | |
4740 | oa->ni = ni_oe; | |
4741 | ||
4742 | attr = ni_find_attr(ni_oe, NULL, NULL, oe->type, oe->ptr, oe->name_len, | |
4743 | NULL, NULL); | |
4744 | ||
4745 | if (!attr) | |
4746 | goto fake_attr; | |
4747 | ||
4748 | t32 = le32_to_cpu(attr->size); | |
195c52bd | 4749 | oa->attr = kmemdup(attr, t32, GFP_NOFS); |
b46acd6a KK |
4750 | if (!oa->attr) |
4751 | goto fake_attr; | |
4752 | ||
4753 | if (!S_ISDIR(inode->i_mode)) { | |
4754 | if (attr->type == ATTR_DATA && !attr->name_len) { | |
4755 | oa->run1 = &ni_oe->file.run; | |
4756 | goto final_oe; | |
4757 | } | |
4758 | } else { | |
4759 | if (attr->type == ATTR_ALLOC && | |
4760 | attr->name_len == ARRAY_SIZE(I30_NAME) && | |
4761 | !memcmp(attr_name(attr), I30_NAME, sizeof(I30_NAME))) { | |
4762 | oa->run1 = &ni_oe->dir.alloc_run; | |
4763 | goto final_oe; | |
4764 | } | |
4765 | } | |
4766 | ||
4767 | if (attr->non_res) { | |
4768 | u16 roff = le16_to_cpu(attr->nres.run_off); | |
4769 | CLST svcn = le64_to_cpu(attr->nres.svcn); | |
4770 | ||
4771 | err = run_unpack(&oa->run0, sbi, inode->i_ino, svcn, | |
4772 | le64_to_cpu(attr->nres.evcn), svcn, | |
4773 | Add2Ptr(attr, roff), t32 - roff); | |
4774 | if (err < 0) { | |
195c52bd | 4775 | kfree(oa->attr); |
b46acd6a KK |
4776 | oa->attr = NULL; |
4777 | goto fake_attr; | |
4778 | } | |
4779 | err = 0; | |
4780 | } | |
4781 | oa->run1 = &oa->run0; | |
4782 | attr = oa->attr; | |
4783 | ||
4784 | final_oe: | |
4785 | if (oe->is_attr_name == 1) | |
195c52bd | 4786 | kfree(oe->ptr); |
b46acd6a KK |
4787 | oe->is_attr_name = 0; |
4788 | oe->ptr = oa; | |
4789 | oe->name_len = attr->name_len; | |
4790 | ||
4791 | goto next_open_attribute; | |
4792 | ||
4793 | /* | |
e8b8e97f KA |
4794 | * Now loop through the dirty page table to extract all of the Vcn/Lcn. |
4795 | * Mapping that we have, and insert it into the appropriate run. | |
b46acd6a KK |
4796 | */ |
4797 | next_dirty_page: | |
4798 | dp = enum_rstbl(dptbl, dp); | |
4799 | if (!dp) | |
4800 | goto do_redo_1; | |
4801 | ||
4802 | oe = Add2Ptr(oatbl, le32_to_cpu(dp->target_attr)); | |
4803 | ||
4804 | if (oe->next != RESTART_ENTRY_ALLOCATED_LE) | |
4805 | goto next_dirty_page; | |
4806 | ||
4807 | oa = oe->ptr; | |
4808 | if (!oa) | |
4809 | goto next_dirty_page; | |
4810 | ||
4811 | i = -1; | |
4812 | next_dirty_page_vcn: | |
4813 | i += 1; | |
4814 | if (i >= le32_to_cpu(dp->lcns_follow)) | |
4815 | goto next_dirty_page; | |
4816 | ||
4817 | vcn = le64_to_cpu(dp->vcn) + i; | |
4818 | size = (vcn + 1) << sbi->cluster_bits; | |
4819 | ||
4820 | if (!dp->page_lcns[i]) | |
4821 | goto next_dirty_page_vcn; | |
4822 | ||
4823 | rno = ino_get(&oe->ref); | |
4824 | if (rno <= MFT_REC_MIRR && | |
4825 | size < (MFT_REC_VOL + 1) * sbi->record_size && | |
4826 | oe->type == ATTR_DATA) { | |
4827 | goto next_dirty_page_vcn; | |
4828 | } | |
4829 | ||
4830 | lcn = le64_to_cpu(dp->page_lcns[i]); | |
4831 | ||
4832 | if ((!run_lookup_entry(oa->run1, vcn, &lcn0, &len0, NULL) || | |
4833 | lcn0 != lcn) && | |
4834 | !run_add_entry(oa->run1, vcn, lcn, 1, false)) { | |
4835 | err = -ENOMEM; | |
4836 | goto out; | |
4837 | } | |
4838 | attr = oa->attr; | |
4839 | t64 = le64_to_cpu(attr->nres.alloc_size); | |
4840 | if (size > t64) { | |
4841 | attr->nres.valid_size = attr->nres.data_size = | |
4842 | attr->nres.alloc_size = cpu_to_le64(size); | |
4843 | } | |
4844 | goto next_dirty_page_vcn; | |
4845 | ||
4846 | do_redo_1: | |
4847 | /* | |
4848 | * Perform the Redo Pass, to restore all of the dirty pages to the same | |
e8b8e97f KA |
4849 | * contents that they had immediately before the crash. If the dirty |
4850 | * page table is empty, then we can skip the entire Redo Pass. | |
b46acd6a KK |
4851 | */ |
4852 | if (!dptbl || !dptbl->total) | |
4853 | goto do_undo_action; | |
4854 | ||
4855 | rec_lsn = rlsn; | |
4856 | ||
4857 | /* | |
4858 | * Read the record at the Redo lsn, before falling | |
e8b8e97f | 4859 | * into common code to handle each record. |
b46acd6a KK |
4860 | */ |
4861 | err = read_log_rec_lcb(log, rlsn, lcb_ctx_next, &lcb); | |
4862 | if (err) | |
4863 | goto out; | |
4864 | ||
4865 | /* | |
e8b8e97f KA |
4866 | * Now loop to read all of our log records forwards, until |
4867 | * we hit the end of the file, cleaning up at the end. | |
b46acd6a KK |
4868 | */ |
4869 | do_action_next: | |
4870 | frh = lcb->lrh; | |
4871 | ||
4872 | if (LfsClientRecord != frh->record_type) | |
4873 | goto read_next_log_do_action; | |
4874 | ||
4875 | transact_id = le32_to_cpu(frh->transact_id); | |
4876 | rec_len = le32_to_cpu(frh->client_data_len); | |
4877 | lrh = lcb->log_rec; | |
4878 | ||
4879 | if (!check_log_rec(lrh, rec_len, transact_id, bytes_per_attr_entry)) { | |
4880 | err = -EINVAL; | |
4881 | goto out; | |
4882 | } | |
4883 | ||
e8b8e97f | 4884 | /* Ignore log records that do not update pages. */ |
b46acd6a KK |
4885 | if (lrh->lcns_follow) |
4886 | goto find_dirty_page; | |
4887 | ||
4888 | goto read_next_log_do_action; | |
4889 | ||
4890 | find_dirty_page: | |
4891 | t16 = le16_to_cpu(lrh->target_attr); | |
4892 | t64 = le64_to_cpu(lrh->target_vcn); | |
4893 | dp = find_dp(dptbl, t16, t64); | |
4894 | ||
4895 | if (!dp) | |
4896 | goto read_next_log_do_action; | |
4897 | ||
4898 | if (rec_lsn < le64_to_cpu(dp->oldest_lsn)) | |
4899 | goto read_next_log_do_action; | |
4900 | ||
4901 | t16 = le16_to_cpu(lrh->target_attr); | |
4902 | if (t16 >= bytes_per_rt(oatbl)) { | |
4903 | err = -EINVAL; | |
4904 | goto out; | |
4905 | } | |
4906 | ||
4907 | oe = Add2Ptr(oatbl, t16); | |
4908 | ||
4909 | if (oe->next != RESTART_ENTRY_ALLOCATED_LE) { | |
4910 | err = -EINVAL; | |
4911 | goto out; | |
4912 | } | |
4913 | ||
4914 | oa = oe->ptr; | |
4915 | ||
4916 | if (!oa) { | |
4917 | err = -EINVAL; | |
4918 | goto out; | |
4919 | } | |
4920 | attr = oa->attr; | |
4921 | ||
4922 | vcn = le64_to_cpu(lrh->target_vcn); | |
4923 | ||
4924 | if (!run_lookup_entry(oa->run1, vcn, &lcn, NULL, NULL) || | |
4925 | lcn == SPARSE_LCN) { | |
4926 | goto read_next_log_do_action; | |
4927 | } | |
4928 | ||
e8b8e97f | 4929 | /* Point to the Redo data and get its length. */ |
b46acd6a KK |
4930 | data = Add2Ptr(lrh, le16_to_cpu(lrh->redo_off)); |
4931 | dlen = le16_to_cpu(lrh->redo_len); | |
4932 | ||
e8b8e97f | 4933 | /* Shorten length by any Lcns which were deleted. */ |
b46acd6a KK |
4934 | saved_len = dlen; |
4935 | ||
4936 | for (i = le16_to_cpu(lrh->lcns_follow); i; i--) { | |
4937 | size_t j; | |
4938 | u32 alen, voff; | |
4939 | ||
4940 | voff = le16_to_cpu(lrh->record_off) + | |
4941 | le16_to_cpu(lrh->attr_off); | |
4942 | voff += le16_to_cpu(lrh->cluster_off) << SECTOR_SHIFT; | |
4943 | ||
e8b8e97f | 4944 | /* If the Vcn question is allocated, we can just get out. */ |
b46acd6a KK |
4945 | j = le64_to_cpu(lrh->target_vcn) - le64_to_cpu(dp->vcn); |
4946 | if (dp->page_lcns[j + i - 1]) | |
4947 | break; | |
4948 | ||
4949 | if (!saved_len) | |
4950 | saved_len = 1; | |
4951 | ||
4952 | /* | |
4953 | * Calculate the allocated space left relative to the | |
e8b8e97f | 4954 | * log record Vcn, after removing this unallocated Vcn. |
b46acd6a KK |
4955 | */ |
4956 | alen = (i - 1) << sbi->cluster_bits; | |
4957 | ||
4958 | /* | |
4959 | * If the update described this log record goes beyond | |
e8b8e97f | 4960 | * the allocated space, then we will have to reduce the length. |
b46acd6a KK |
4961 | */ |
4962 | if (voff >= alen) | |
4963 | dlen = 0; | |
4964 | else if (voff + dlen > alen) | |
4965 | dlen = alen - voff; | |
4966 | } | |
4967 | ||
e8b8e97f KA |
4968 | /* |
4969 | * If the resulting dlen from above is now zero, | |
4970 | * we can skip this log record. | |
4971 | */ | |
b46acd6a KK |
4972 | if (!dlen && saved_len) |
4973 | goto read_next_log_do_action; | |
4974 | ||
4975 | t16 = le16_to_cpu(lrh->redo_op); | |
4976 | if (can_skip_action(t16)) | |
4977 | goto read_next_log_do_action; | |
4978 | ||
e8b8e97f | 4979 | /* Apply the Redo operation a common routine. */ |
b46acd6a KK |
4980 | err = do_action(log, oe, lrh, t16, data, dlen, rec_len, &rec_lsn); |
4981 | if (err) | |
4982 | goto out; | |
4983 | ||
e8b8e97f | 4984 | /* Keep reading and looping back until end of file. */ |
b46acd6a KK |
4985 | read_next_log_do_action: |
4986 | err = read_next_log_rec(log, lcb, &rec_lsn); | |
4987 | if (!err && rec_lsn) | |
4988 | goto do_action_next; | |
4989 | ||
4990 | lcb_put(lcb); | |
4991 | lcb = NULL; | |
4992 | ||
4993 | do_undo_action: | |
e8b8e97f | 4994 | /* Scan Transaction Table. */ |
b46acd6a KK |
4995 | tr = NULL; |
4996 | transaction_table_next: | |
4997 | tr = enum_rstbl(trtbl, tr); | |
4998 | if (!tr) | |
4999 | goto undo_action_done; | |
5000 | ||
5001 | if (TransactionActive != tr->transact_state || !tr->undo_next_lsn) { | |
5002 | free_rsttbl_idx(trtbl, PtrOffset(trtbl, tr)); | |
5003 | goto transaction_table_next; | |
5004 | } | |
5005 | ||
5006 | log->transaction_id = PtrOffset(trtbl, tr); | |
5007 | undo_next_lsn = le64_to_cpu(tr->undo_next_lsn); | |
5008 | ||
5009 | /* | |
5010 | * We only have to do anything if the transaction has | |
e8b8e97f | 5011 | * something its undo_next_lsn field. |
b46acd6a KK |
5012 | */ |
5013 | if (!undo_next_lsn) | |
5014 | goto commit_undo; | |
5015 | ||
e8b8e97f | 5016 | /* Read the first record to be undone by this transaction. */ |
b46acd6a KK |
5017 | err = read_log_rec_lcb(log, undo_next_lsn, lcb_ctx_undo_next, &lcb); |
5018 | if (err) | |
5019 | goto out; | |
5020 | ||
5021 | /* | |
5022 | * Now loop to read all of our log records forwards, | |
e8b8e97f | 5023 | * until we hit the end of the file, cleaning up at the end. |
b46acd6a KK |
5024 | */ |
5025 | undo_action_next: | |
5026 | ||
5027 | lrh = lcb->log_rec; | |
5028 | frh = lcb->lrh; | |
5029 | transact_id = le32_to_cpu(frh->transact_id); | |
5030 | rec_len = le32_to_cpu(frh->client_data_len); | |
5031 | ||
5032 | if (!check_log_rec(lrh, rec_len, transact_id, bytes_per_attr_entry)) { | |
5033 | err = -EINVAL; | |
5034 | goto out; | |
5035 | } | |
5036 | ||
5037 | if (lrh->undo_op == cpu_to_le16(Noop)) | |
5038 | goto read_next_log_undo_action; | |
5039 | ||
5040 | oe = Add2Ptr(oatbl, le16_to_cpu(lrh->target_attr)); | |
5041 | oa = oe->ptr; | |
5042 | ||
5043 | t16 = le16_to_cpu(lrh->lcns_follow); | |
5044 | if (!t16) | |
5045 | goto add_allocated_vcns; | |
5046 | ||
5047 | is_mapped = run_lookup_entry(oa->run1, le64_to_cpu(lrh->target_vcn), | |
5048 | &lcn, &clen, NULL); | |
5049 | ||
5050 | /* | |
5051 | * If the mapping isn't already the table or the mapping | |
5052 | * corresponds to a hole the mapping, we need to make sure | |
e8b8e97f | 5053 | * there is no partial page already memory. |
b46acd6a KK |
5054 | */ |
5055 | if (is_mapped && lcn != SPARSE_LCN && clen >= t16) | |
5056 | goto add_allocated_vcns; | |
5057 | ||
5058 | vcn = le64_to_cpu(lrh->target_vcn); | |
5059 | vcn &= ~(log->clst_per_page - 1); | |
5060 | ||
5061 | add_allocated_vcns: | |
5062 | for (i = 0, vcn = le64_to_cpu(lrh->target_vcn), | |
5063 | size = (vcn + 1) << sbi->cluster_bits; | |
5064 | i < t16; i++, vcn += 1, size += sbi->cluster_size) { | |
5065 | attr = oa->attr; | |
5066 | if (!attr->non_res) { | |
5067 | if (size > le32_to_cpu(attr->res.data_size)) | |
5068 | attr->res.data_size = cpu_to_le32(size); | |
5069 | } else { | |
5070 | if (size > le64_to_cpu(attr->nres.data_size)) | |
5071 | attr->nres.valid_size = attr->nres.data_size = | |
5072 | attr->nres.alloc_size = | |
5073 | cpu_to_le64(size); | |
5074 | } | |
5075 | } | |
5076 | ||
5077 | t16 = le16_to_cpu(lrh->undo_op); | |
5078 | if (can_skip_action(t16)) | |
5079 | goto read_next_log_undo_action; | |
5080 | ||
e8b8e97f | 5081 | /* Point to the Redo data and get its length. */ |
b46acd6a KK |
5082 | data = Add2Ptr(lrh, le16_to_cpu(lrh->undo_off)); |
5083 | dlen = le16_to_cpu(lrh->undo_len); | |
5084 | ||
e8b8e97f | 5085 | /* It is time to apply the undo action. */ |
b46acd6a KK |
5086 | err = do_action(log, oe, lrh, t16, data, dlen, rec_len, NULL); |
5087 | ||
5088 | read_next_log_undo_action: | |
5089 | /* | |
5090 | * Keep reading and looping back until we have read the | |
e8b8e97f | 5091 | * last record for this transaction. |
b46acd6a KK |
5092 | */ |
5093 | err = read_next_log_rec(log, lcb, &rec_lsn); | |
5094 | if (err) | |
5095 | goto out; | |
5096 | ||
5097 | if (rec_lsn) | |
5098 | goto undo_action_next; | |
5099 | ||
5100 | lcb_put(lcb); | |
5101 | lcb = NULL; | |
5102 | ||
5103 | commit_undo: | |
5104 | free_rsttbl_idx(trtbl, log->transaction_id); | |
5105 | ||
5106 | log->transaction_id = 0; | |
5107 | ||
5108 | goto transaction_table_next; | |
5109 | ||
5110 | undo_action_done: | |
5111 | ||
5112 | ntfs_update_mftmirr(sbi, 0); | |
5113 | ||
5114 | sbi->flags &= ~NTFS_FLAGS_NEED_REPLAY; | |
5115 | ||
5116 | end_reply: | |
5117 | ||
5118 | err = 0; | |
5119 | if (is_ro) | |
5120 | goto out; | |
5121 | ||
195c52bd | 5122 | rh = kzalloc(log->page_size, GFP_NOFS); |
b46acd6a KK |
5123 | if (!rh) { |
5124 | err = -ENOMEM; | |
5125 | goto out; | |
5126 | } | |
5127 | ||
5128 | rh->rhdr.sign = NTFS_RSTR_SIGNATURE; | |
5129 | rh->rhdr.fix_off = cpu_to_le16(offsetof(struct RESTART_HDR, fixups)); | |
5130 | t16 = (log->page_size >> SECTOR_SHIFT) + 1; | |
5131 | rh->rhdr.fix_num = cpu_to_le16(t16); | |
5132 | rh->sys_page_size = cpu_to_le32(log->page_size); | |
5133 | rh->page_size = cpu_to_le32(log->page_size); | |
5134 | ||
fa3cacf5 KA |
5135 | t16 = ALIGN(offsetof(struct RESTART_HDR, fixups) + |
5136 | sizeof(short) * t16, 8); | |
b46acd6a KK |
5137 | rh->ra_off = cpu_to_le16(t16); |
5138 | rh->minor_ver = cpu_to_le16(1); // 0x1A: | |
5139 | rh->major_ver = cpu_to_le16(1); // 0x1C: | |
5140 | ||
5141 | ra2 = Add2Ptr(rh, t16); | |
5142 | memcpy(ra2, ra, sizeof(struct RESTART_AREA)); | |
5143 | ||
5144 | ra2->client_idx[0] = 0; | |
5145 | ra2->client_idx[1] = LFS_NO_CLIENT_LE; | |
5146 | ra2->flags = cpu_to_le16(2); | |
5147 | ||
5148 | le32_add_cpu(&ra2->open_log_count, 1); | |
5149 | ||
5150 | ntfs_fix_pre_write(&rh->rhdr, log->page_size); | |
5151 | ||
5152 | err = ntfs_sb_write_run(sbi, &ni->file.run, 0, rh, log->page_size); | |
5153 | if (!err) | |
5154 | err = ntfs_sb_write_run(sbi, &log->ni->file.run, log->page_size, | |
5155 | rh, log->page_size); | |
5156 | ||
195c52bd | 5157 | kfree(rh); |
b46acd6a KK |
5158 | if (err) |
5159 | goto out; | |
5160 | ||
5161 | out: | |
195c52bd | 5162 | kfree(rst); |
b46acd6a KK |
5163 | if (lcb) |
5164 | lcb_put(lcb); | |
5165 | ||
e8b8e97f KA |
5166 | /* |
5167 | * Scan the Open Attribute Table to close all of | |
5168 | * the open attributes. | |
5169 | */ | |
b46acd6a KK |
5170 | oe = NULL; |
5171 | while ((oe = enum_rstbl(oatbl, oe))) { | |
5172 | rno = ino_get(&oe->ref); | |
5173 | ||
5174 | if (oe->is_attr_name == 1) { | |
195c52bd | 5175 | kfree(oe->ptr); |
b46acd6a KK |
5176 | oe->ptr = NULL; |
5177 | continue; | |
5178 | } | |
5179 | ||
5180 | if (oe->is_attr_name) | |
5181 | continue; | |
5182 | ||
5183 | oa = oe->ptr; | |
5184 | if (!oa) | |
5185 | continue; | |
5186 | ||
5187 | run_close(&oa->run0); | |
195c52bd | 5188 | kfree(oa->attr); |
b46acd6a KK |
5189 | if (oa->ni) |
5190 | iput(&oa->ni->vfs_inode); | |
195c52bd | 5191 | kfree(oa); |
b46acd6a KK |
5192 | } |
5193 | ||
195c52bd KA |
5194 | kfree(trtbl); |
5195 | kfree(oatbl); | |
5196 | kfree(dptbl); | |
5197 | kfree(attr_names); | |
5198 | kfree(rst_info.r_page); | |
b46acd6a | 5199 | |
195c52bd KA |
5200 | kfree(ra); |
5201 | kfree(log->one_page_buf); | |
b46acd6a KK |
5202 | |
5203 | if (err) | |
5204 | sbi->flags |= NTFS_FLAGS_NEED_REPLAY; | |
5205 | ||
5206 | if (err == -EROFS) | |
5207 | err = 0; | |
5208 | else if (log->set_dirty) | |
5209 | ntfs_set_state(sbi, NTFS_DIRTY_ERROR); | |
5210 | ||
195c52bd | 5211 | kfree(log); |
b46acd6a KK |
5212 | |
5213 | return err; | |
5214 | } |