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Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
fe6c991c | 3 | * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
4 | * |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
b3b94faa DT |
10 | #include <linux/slab.h> |
11 | #include <linux/spinlock.h> | |
12 | #include <linux/completion.h> | |
13 | #include <linux/buffer_head.h> | |
f42faf4f | 14 | #include <linux/fs.h> |
5c676f6d | 15 | #include <linux/gfs2_ondisk.h> |
1f466a47 | 16 | #include <linux/prefetch.h> |
f15ab561 | 17 | #include <linux/blkdev.h> |
b3b94faa DT |
18 | |
19 | #include "gfs2.h" | |
5c676f6d | 20 | #include "incore.h" |
b3b94faa DT |
21 | #include "glock.h" |
22 | #include "glops.h" | |
b3b94faa DT |
23 | #include "lops.h" |
24 | #include "meta_io.h" | |
25 | #include "quota.h" | |
26 | #include "rgrp.h" | |
27 | #include "super.h" | |
28 | #include "trans.h" | |
5c676f6d | 29 | #include "util.h" |
172e045a | 30 | #include "log.h" |
c8cdf479 | 31 | #include "inode.h" |
51ff87bd | 32 | #include "ops_address.h" |
b3b94faa | 33 | |
2c1e52aa | 34 | #define BFITNOENT ((u32)~0) |
6760bdcd | 35 | #define NO_BLOCK ((u64)~0) |
88c8ab1f | 36 | |
1f466a47 BP |
37 | #if BITS_PER_LONG == 32 |
38 | #define LBITMASK (0x55555555UL) | |
39 | #define LBITSKIP55 (0x55555555UL) | |
40 | #define LBITSKIP00 (0x00000000UL) | |
41 | #else | |
42 | #define LBITMASK (0x5555555555555555UL) | |
43 | #define LBITSKIP55 (0x5555555555555555UL) | |
44 | #define LBITSKIP00 (0x0000000000000000UL) | |
45 | #endif | |
46 | ||
88c8ab1f SW |
47 | /* |
48 | * These routines are used by the resource group routines (rgrp.c) | |
49 | * to keep track of block allocation. Each block is represented by two | |
feaa7bba SW |
50 | * bits. So, each byte represents GFS2_NBBY (i.e. 4) blocks. |
51 | * | |
52 | * 0 = Free | |
53 | * 1 = Used (not metadata) | |
54 | * 2 = Unlinked (still in use) inode | |
55 | * 3 = Used (metadata) | |
88c8ab1f SW |
56 | */ |
57 | ||
58 | static const char valid_change[16] = { | |
59 | /* current */ | |
feaa7bba | 60 | /* n */ 0, 1, 1, 1, |
88c8ab1f | 61 | /* e */ 1, 0, 0, 0, |
feaa7bba | 62 | /* w */ 0, 0, 0, 1, |
88c8ab1f SW |
63 | 1, 0, 0, 0 |
64 | }; | |
65 | ||
c8cdf479 | 66 | static u32 rgblk_search(struct gfs2_rgrpd *rgd, u32 goal, |
b45e41d7 SW |
67 | unsigned char old_state, unsigned char new_state, |
68 | unsigned int *n); | |
c8cdf479 | 69 | |
88c8ab1f SW |
70 | /** |
71 | * gfs2_setbit - Set a bit in the bitmaps | |
72 | * @buffer: the buffer that holds the bitmaps | |
73 | * @buflen: the length (in bytes) of the buffer | |
74 | * @block: the block to set | |
75 | * @new_state: the new state of the block | |
76 | * | |
77 | */ | |
78 | ||
b45e41d7 SW |
79 | static inline void gfs2_setbit(struct gfs2_rgrpd *rgd, unsigned char *buf1, |
80 | unsigned char *buf2, unsigned int offset, | |
81 | unsigned int buflen, u32 block, | |
82 | unsigned char new_state) | |
88c8ab1f | 83 | { |
b45e41d7 SW |
84 | unsigned char *byte1, *byte2, *end, cur_state; |
85 | const unsigned int bit = (block % GFS2_NBBY) * GFS2_BIT_SIZE; | |
88c8ab1f | 86 | |
b45e41d7 SW |
87 | byte1 = buf1 + offset + (block / GFS2_NBBY); |
88 | end = buf1 + offset + buflen; | |
88c8ab1f | 89 | |
b45e41d7 | 90 | BUG_ON(byte1 >= end); |
88c8ab1f | 91 | |
b45e41d7 | 92 | cur_state = (*byte1 >> bit) & GFS2_BIT_MASK; |
88c8ab1f | 93 | |
b45e41d7 | 94 | if (unlikely(!valid_change[new_state * 4 + cur_state])) { |
88c8ab1f | 95 | gfs2_consist_rgrpd(rgd); |
b45e41d7 SW |
96 | return; |
97 | } | |
98 | *byte1 ^= (cur_state ^ new_state) << bit; | |
99 | ||
100 | if (buf2) { | |
101 | byte2 = buf2 + offset + (block / GFS2_NBBY); | |
102 | cur_state = (*byte2 >> bit) & GFS2_BIT_MASK; | |
103 | *byte2 ^= (cur_state ^ new_state) << bit; | |
104 | } | |
88c8ab1f SW |
105 | } |
106 | ||
107 | /** | |
108 | * gfs2_testbit - test a bit in the bitmaps | |
109 | * @buffer: the buffer that holds the bitmaps | |
110 | * @buflen: the length (in bytes) of the buffer | |
111 | * @block: the block to read | |
112 | * | |
113 | */ | |
114 | ||
b45e41d7 SW |
115 | static inline unsigned char gfs2_testbit(struct gfs2_rgrpd *rgd, |
116 | const unsigned char *buffer, | |
117 | unsigned int buflen, u32 block) | |
88c8ab1f | 118 | { |
b45e41d7 SW |
119 | const unsigned char *byte, *end; |
120 | unsigned char cur_state; | |
88c8ab1f SW |
121 | unsigned int bit; |
122 | ||
123 | byte = buffer + (block / GFS2_NBBY); | |
124 | bit = (block % GFS2_NBBY) * GFS2_BIT_SIZE; | |
125 | end = buffer + buflen; | |
126 | ||
127 | gfs2_assert(rgd->rd_sbd, byte < end); | |
128 | ||
129 | cur_state = (*byte >> bit) & GFS2_BIT_MASK; | |
130 | ||
131 | return cur_state; | |
132 | } | |
133 | ||
134 | /** | |
135 | * gfs2_bitfit - Search an rgrp's bitmap buffer to find a bit-pair representing | |
136 | * a block in a given allocation state. | |
137 | * @buffer: the buffer that holds the bitmaps | |
138 | * @buflen: the length (in bytes) of the buffer | |
139 | * @goal: start search at this block's bit-pair (within @buffer) | |
6760bdcd | 140 | * @old_state: GFS2_BLKST_XXX the state of the block we're looking for. |
88c8ab1f SW |
141 | * |
142 | * Scope of @goal and returned block number is only within this bitmap buffer, | |
143 | * not entire rgrp or filesystem. @buffer will be offset from the actual | |
144 | * beginning of a bitmap block buffer, skipping any header structures. | |
145 | * | |
146 | * Return: the block number (bitmap buffer scope) that was found | |
147 | */ | |
148 | ||
110acf38 SW |
149 | static u32 gfs2_bitfit(const u8 *buffer, unsigned int buflen, u32 goal, |
150 | u8 old_state) | |
88c8ab1f | 151 | { |
1f466a47 BP |
152 | const u8 *byte, *start, *end; |
153 | int bit, startbit; | |
154 | u32 g1, g2, misaligned; | |
155 | unsigned long *plong; | |
156 | unsigned long lskipval; | |
157 | ||
158 | lskipval = (old_state & GFS2_BLKST_USED) ? LBITSKIP00 : LBITSKIP55; | |
159 | g1 = (goal / GFS2_NBBY); | |
160 | start = buffer + g1; | |
161 | byte = start; | |
162 | end = buffer + buflen; | |
163 | g2 = ALIGN(g1, sizeof(unsigned long)); | |
164 | plong = (unsigned long *)(buffer + g2); | |
165 | startbit = bit = (goal % GFS2_NBBY) * GFS2_BIT_SIZE; | |
166 | misaligned = g2 - g1; | |
167 | if (!misaligned) | |
168 | goto ulong_aligned; | |
169 | /* parse the bitmap a byte at a time */ | |
170 | misaligned: | |
171 | while (byte < end) { | |
172 | if (((*byte >> bit) & GFS2_BIT_MASK) == old_state) { | |
173 | return goal + | |
174 | (((byte - start) * GFS2_NBBY) + | |
175 | ((bit - startbit) >> 1)); | |
88c8ab1f | 176 | } |
88c8ab1f | 177 | bit += GFS2_BIT_SIZE; |
1f466a47 | 178 | if (bit >= GFS2_NBBY * GFS2_BIT_SIZE) { |
88c8ab1f SW |
179 | bit = 0; |
180 | byte++; | |
1f466a47 BP |
181 | misaligned--; |
182 | if (!misaligned) { | |
183 | plong = (unsigned long *)byte; | |
184 | goto ulong_aligned; | |
185 | } | |
88c8ab1f | 186 | } |
88c8ab1f | 187 | } |
1f466a47 | 188 | return BFITNOENT; |
88c8ab1f | 189 | |
1f466a47 BP |
190 | /* parse the bitmap a unsigned long at a time */ |
191 | ulong_aligned: | |
192 | /* Stop at "end - 1" or else prefetch can go past the end and segfault. | |
193 | We could "if" it but we'd lose some of the performance gained. | |
194 | This way will only slow down searching the very last 4/8 bytes | |
195 | depending on architecture. I've experimented with several ways | |
196 | of writing this section such as using an else before the goto | |
197 | but this one seems to be the fastest. */ | |
17c15da0 | 198 | while ((unsigned char *)plong < end - sizeof(unsigned long)) { |
1f466a47 BP |
199 | prefetch(plong + 1); |
200 | if (((*plong) & LBITMASK) != lskipval) | |
201 | break; | |
202 | plong++; | |
203 | } | |
204 | if ((unsigned char *)plong < end) { | |
205 | byte = (const u8 *)plong; | |
206 | misaligned += sizeof(unsigned long) - 1; | |
207 | goto misaligned; | |
208 | } | |
88c8ab1f SW |
209 | return BFITNOENT; |
210 | } | |
211 | ||
212 | /** | |
213 | * gfs2_bitcount - count the number of bits in a certain state | |
214 | * @buffer: the buffer that holds the bitmaps | |
215 | * @buflen: the length (in bytes) of the buffer | |
216 | * @state: the state of the block we're looking for | |
217 | * | |
218 | * Returns: The number of bits | |
219 | */ | |
220 | ||
110acf38 SW |
221 | static u32 gfs2_bitcount(struct gfs2_rgrpd *rgd, const u8 *buffer, |
222 | unsigned int buflen, u8 state) | |
88c8ab1f | 223 | { |
110acf38 SW |
224 | const u8 *byte = buffer; |
225 | const u8 *end = buffer + buflen; | |
226 | const u8 state1 = state << 2; | |
227 | const u8 state2 = state << 4; | |
228 | const u8 state3 = state << 6; | |
cd915493 | 229 | u32 count = 0; |
88c8ab1f SW |
230 | |
231 | for (; byte < end; byte++) { | |
232 | if (((*byte) & 0x03) == state) | |
233 | count++; | |
234 | if (((*byte) & 0x0C) == state1) | |
235 | count++; | |
236 | if (((*byte) & 0x30) == state2) | |
237 | count++; | |
238 | if (((*byte) & 0xC0) == state3) | |
239 | count++; | |
240 | } | |
241 | ||
242 | return count; | |
243 | } | |
244 | ||
b3b94faa DT |
245 | /** |
246 | * gfs2_rgrp_verify - Verify that a resource group is consistent | |
247 | * @sdp: the filesystem | |
248 | * @rgd: the rgrp | |
249 | * | |
250 | */ | |
251 | ||
252 | void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd) | |
253 | { | |
254 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
255 | struct gfs2_bitmap *bi = NULL; | |
bb8d8a6f | 256 | u32 length = rgd->rd_length; |
cd915493 | 257 | u32 count[4], tmp; |
b3b94faa DT |
258 | int buf, x; |
259 | ||
cd915493 | 260 | memset(count, 0, 4 * sizeof(u32)); |
b3b94faa DT |
261 | |
262 | /* Count # blocks in each of 4 possible allocation states */ | |
263 | for (buf = 0; buf < length; buf++) { | |
264 | bi = rgd->rd_bits + buf; | |
265 | for (x = 0; x < 4; x++) | |
266 | count[x] += gfs2_bitcount(rgd, | |
267 | bi->bi_bh->b_data + | |
268 | bi->bi_offset, | |
269 | bi->bi_len, x); | |
270 | } | |
271 | ||
cfc8b549 | 272 | if (count[0] != rgd->rd_free) { |
b3b94faa DT |
273 | if (gfs2_consist_rgrpd(rgd)) |
274 | fs_err(sdp, "free data mismatch: %u != %u\n", | |
cfc8b549 | 275 | count[0], rgd->rd_free); |
b3b94faa DT |
276 | return; |
277 | } | |
278 | ||
73f74948 | 279 | tmp = rgd->rd_data - rgd->rd_free - rgd->rd_dinodes; |
feaa7bba | 280 | if (count[1] + count[2] != tmp) { |
b3b94faa DT |
281 | if (gfs2_consist_rgrpd(rgd)) |
282 | fs_err(sdp, "used data mismatch: %u != %u\n", | |
283 | count[1], tmp); | |
284 | return; | |
285 | } | |
286 | ||
73f74948 | 287 | if (count[3] != rgd->rd_dinodes) { |
b3b94faa | 288 | if (gfs2_consist_rgrpd(rgd)) |
feaa7bba | 289 | fs_err(sdp, "used metadata mismatch: %u != %u\n", |
73f74948 | 290 | count[3], rgd->rd_dinodes); |
b3b94faa DT |
291 | return; |
292 | } | |
293 | ||
feaa7bba | 294 | if (count[2] > count[3]) { |
b3b94faa | 295 | if (gfs2_consist_rgrpd(rgd)) |
feaa7bba SW |
296 | fs_err(sdp, "unlinked inodes > inodes: %u\n", |
297 | count[2]); | |
b3b94faa DT |
298 | return; |
299 | } | |
feaa7bba | 300 | |
b3b94faa DT |
301 | } |
302 | ||
bb8d8a6f | 303 | static inline int rgrp_contains_block(struct gfs2_rgrpd *rgd, u64 block) |
b3b94faa | 304 | { |
bb8d8a6f SW |
305 | u64 first = rgd->rd_data0; |
306 | u64 last = first + rgd->rd_data; | |
16910427 | 307 | return first <= block && block < last; |
b3b94faa DT |
308 | } |
309 | ||
310 | /** | |
311 | * gfs2_blk2rgrpd - Find resource group for a given data/meta block number | |
312 | * @sdp: The GFS2 superblock | |
313 | * @n: The data block number | |
314 | * | |
315 | * Returns: The resource group, or NULL if not found | |
316 | */ | |
317 | ||
cd915493 | 318 | struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk) |
b3b94faa DT |
319 | { |
320 | struct gfs2_rgrpd *rgd; | |
321 | ||
322 | spin_lock(&sdp->sd_rindex_spin); | |
323 | ||
324 | list_for_each_entry(rgd, &sdp->sd_rindex_mru_list, rd_list_mru) { | |
bb8d8a6f | 325 | if (rgrp_contains_block(rgd, blk)) { |
b3b94faa DT |
326 | list_move(&rgd->rd_list_mru, &sdp->sd_rindex_mru_list); |
327 | spin_unlock(&sdp->sd_rindex_spin); | |
328 | return rgd; | |
329 | } | |
330 | } | |
331 | ||
332 | spin_unlock(&sdp->sd_rindex_spin); | |
333 | ||
334 | return NULL; | |
335 | } | |
336 | ||
337 | /** | |
338 | * gfs2_rgrpd_get_first - get the first Resource Group in the filesystem | |
339 | * @sdp: The GFS2 superblock | |
340 | * | |
341 | * Returns: The first rgrp in the filesystem | |
342 | */ | |
343 | ||
344 | struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp) | |
345 | { | |
346 | gfs2_assert(sdp, !list_empty(&sdp->sd_rindex_list)); | |
347 | return list_entry(sdp->sd_rindex_list.next, struct gfs2_rgrpd, rd_list); | |
348 | } | |
349 | ||
350 | /** | |
351 | * gfs2_rgrpd_get_next - get the next RG | |
352 | * @rgd: A RG | |
353 | * | |
354 | * Returns: The next rgrp | |
355 | */ | |
356 | ||
357 | struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd) | |
358 | { | |
359 | if (rgd->rd_list.next == &rgd->rd_sbd->sd_rindex_list) | |
360 | return NULL; | |
361 | return list_entry(rgd->rd_list.next, struct gfs2_rgrpd, rd_list); | |
362 | } | |
363 | ||
364 | static void clear_rgrpdi(struct gfs2_sbd *sdp) | |
365 | { | |
366 | struct list_head *head; | |
367 | struct gfs2_rgrpd *rgd; | |
368 | struct gfs2_glock *gl; | |
369 | ||
370 | spin_lock(&sdp->sd_rindex_spin); | |
371 | sdp->sd_rindex_forward = NULL; | |
b3b94faa DT |
372 | spin_unlock(&sdp->sd_rindex_spin); |
373 | ||
374 | head = &sdp->sd_rindex_list; | |
375 | while (!list_empty(head)) { | |
376 | rgd = list_entry(head->next, struct gfs2_rgrpd, rd_list); | |
377 | gl = rgd->rd_gl; | |
378 | ||
379 | list_del(&rgd->rd_list); | |
380 | list_del(&rgd->rd_list_mru); | |
381 | ||
382 | if (gl) { | |
5c676f6d | 383 | gl->gl_object = NULL; |
b3b94faa DT |
384 | gfs2_glock_put(gl); |
385 | } | |
386 | ||
387 | kfree(rgd->rd_bits); | |
6bdd9be6 | 388 | kmem_cache_free(gfs2_rgrpd_cachep, rgd); |
b3b94faa DT |
389 | } |
390 | } | |
391 | ||
392 | void gfs2_clear_rgrpd(struct gfs2_sbd *sdp) | |
393 | { | |
f55ab26a | 394 | mutex_lock(&sdp->sd_rindex_mutex); |
b3b94faa | 395 | clear_rgrpdi(sdp); |
f55ab26a | 396 | mutex_unlock(&sdp->sd_rindex_mutex); |
b3b94faa DT |
397 | } |
398 | ||
bb8d8a6f SW |
399 | static void gfs2_rindex_print(const struct gfs2_rgrpd *rgd) |
400 | { | |
401 | printk(KERN_INFO " ri_addr = %llu\n", (unsigned long long)rgd->rd_addr); | |
402 | printk(KERN_INFO " ri_length = %u\n", rgd->rd_length); | |
403 | printk(KERN_INFO " ri_data0 = %llu\n", (unsigned long long)rgd->rd_data0); | |
404 | printk(KERN_INFO " ri_data = %u\n", rgd->rd_data); | |
405 | printk(KERN_INFO " ri_bitbytes = %u\n", rgd->rd_bitbytes); | |
406 | } | |
407 | ||
b3b94faa DT |
408 | /** |
409 | * gfs2_compute_bitstructs - Compute the bitmap sizes | |
410 | * @rgd: The resource group descriptor | |
411 | * | |
412 | * Calculates bitmap descriptors, one for each block that contains bitmap data | |
413 | * | |
414 | * Returns: errno | |
415 | */ | |
416 | ||
417 | static int compute_bitstructs(struct gfs2_rgrpd *rgd) | |
418 | { | |
419 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
420 | struct gfs2_bitmap *bi; | |
bb8d8a6f | 421 | u32 length = rgd->rd_length; /* # blocks in hdr & bitmap */ |
cd915493 | 422 | u32 bytes_left, bytes; |
b3b94faa DT |
423 | int x; |
424 | ||
feaa7bba SW |
425 | if (!length) |
426 | return -EINVAL; | |
427 | ||
dd894be8 | 428 | rgd->rd_bits = kcalloc(length, sizeof(struct gfs2_bitmap), GFP_NOFS); |
b3b94faa DT |
429 | if (!rgd->rd_bits) |
430 | return -ENOMEM; | |
431 | ||
bb8d8a6f | 432 | bytes_left = rgd->rd_bitbytes; |
b3b94faa DT |
433 | |
434 | for (x = 0; x < length; x++) { | |
435 | bi = rgd->rd_bits + x; | |
436 | ||
437 | /* small rgrp; bitmap stored completely in header block */ | |
438 | if (length == 1) { | |
439 | bytes = bytes_left; | |
440 | bi->bi_offset = sizeof(struct gfs2_rgrp); | |
441 | bi->bi_start = 0; | |
442 | bi->bi_len = bytes; | |
443 | /* header block */ | |
444 | } else if (x == 0) { | |
445 | bytes = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_rgrp); | |
446 | bi->bi_offset = sizeof(struct gfs2_rgrp); | |
447 | bi->bi_start = 0; | |
448 | bi->bi_len = bytes; | |
449 | /* last block */ | |
450 | } else if (x + 1 == length) { | |
451 | bytes = bytes_left; | |
452 | bi->bi_offset = sizeof(struct gfs2_meta_header); | |
bb8d8a6f | 453 | bi->bi_start = rgd->rd_bitbytes - bytes_left; |
b3b94faa DT |
454 | bi->bi_len = bytes; |
455 | /* other blocks */ | |
456 | } else { | |
568f4c96 SW |
457 | bytes = sdp->sd_sb.sb_bsize - |
458 | sizeof(struct gfs2_meta_header); | |
b3b94faa | 459 | bi->bi_offset = sizeof(struct gfs2_meta_header); |
bb8d8a6f | 460 | bi->bi_start = rgd->rd_bitbytes - bytes_left; |
b3b94faa DT |
461 | bi->bi_len = bytes; |
462 | } | |
463 | ||
464 | bytes_left -= bytes; | |
465 | } | |
466 | ||
467 | if (bytes_left) { | |
468 | gfs2_consist_rgrpd(rgd); | |
469 | return -EIO; | |
470 | } | |
471 | bi = rgd->rd_bits + (length - 1); | |
bb8d8a6f | 472 | if ((bi->bi_start + bi->bi_len) * GFS2_NBBY != rgd->rd_data) { |
b3b94faa | 473 | if (gfs2_consist_rgrpd(rgd)) { |
bb8d8a6f | 474 | gfs2_rindex_print(rgd); |
b3b94faa DT |
475 | fs_err(sdp, "start=%u len=%u offset=%u\n", |
476 | bi->bi_start, bi->bi_len, bi->bi_offset); | |
477 | } | |
478 | return -EIO; | |
479 | } | |
480 | ||
481 | return 0; | |
482 | } | |
483 | ||
7ae8fa84 RP |
484 | /** |
485 | * gfs2_ri_total - Total up the file system space, according to the rindex. | |
486 | * | |
487 | */ | |
488 | u64 gfs2_ri_total(struct gfs2_sbd *sdp) | |
489 | { | |
490 | u64 total_data = 0; | |
491 | struct inode *inode = sdp->sd_rindex; | |
492 | struct gfs2_inode *ip = GFS2_I(inode); | |
7ae8fa84 RP |
493 | char buf[sizeof(struct gfs2_rindex)]; |
494 | struct file_ra_state ra_state; | |
495 | int error, rgrps; | |
496 | ||
497 | mutex_lock(&sdp->sd_rindex_mutex); | |
498 | file_ra_state_init(&ra_state, inode->i_mapping); | |
499 | for (rgrps = 0;; rgrps++) { | |
500 | loff_t pos = rgrps * sizeof(struct gfs2_rindex); | |
501 | ||
c9e98886 | 502 | if (pos + sizeof(struct gfs2_rindex) >= ip->i_disksize) |
7ae8fa84 RP |
503 | break; |
504 | error = gfs2_internal_read(ip, &ra_state, buf, &pos, | |
505 | sizeof(struct gfs2_rindex)); | |
506 | if (error != sizeof(struct gfs2_rindex)) | |
507 | break; | |
bb8d8a6f | 508 | total_data += be32_to_cpu(((struct gfs2_rindex *)buf)->ri_data); |
7ae8fa84 RP |
509 | } |
510 | mutex_unlock(&sdp->sd_rindex_mutex); | |
511 | return total_data; | |
512 | } | |
513 | ||
bb8d8a6f SW |
514 | static void gfs2_rindex_in(struct gfs2_rgrpd *rgd, const void *buf) |
515 | { | |
516 | const struct gfs2_rindex *str = buf; | |
517 | ||
518 | rgd->rd_addr = be64_to_cpu(str->ri_addr); | |
519 | rgd->rd_length = be32_to_cpu(str->ri_length); | |
520 | rgd->rd_data0 = be64_to_cpu(str->ri_data0); | |
521 | rgd->rd_data = be32_to_cpu(str->ri_data); | |
522 | rgd->rd_bitbytes = be32_to_cpu(str->ri_bitbytes); | |
523 | } | |
524 | ||
b3b94faa | 525 | /** |
6c53267f | 526 | * read_rindex_entry - Pull in a new resource index entry from the disk |
b3b94faa DT |
527 | * @gl: The glock covering the rindex inode |
528 | * | |
6c53267f RP |
529 | * Returns: 0 on success, error code otherwise |
530 | */ | |
531 | ||
532 | static int read_rindex_entry(struct gfs2_inode *ip, | |
533 | struct file_ra_state *ra_state) | |
534 | { | |
535 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
536 | loff_t pos = sdp->sd_rgrps * sizeof(struct gfs2_rindex); | |
537 | char buf[sizeof(struct gfs2_rindex)]; | |
538 | int error; | |
539 | struct gfs2_rgrpd *rgd; | |
540 | ||
541 | error = gfs2_internal_read(ip, ra_state, buf, &pos, | |
542 | sizeof(struct gfs2_rindex)); | |
543 | if (!error) | |
544 | return 0; | |
545 | if (error != sizeof(struct gfs2_rindex)) { | |
546 | if (error > 0) | |
547 | error = -EIO; | |
548 | return error; | |
549 | } | |
550 | ||
6bdd9be6 | 551 | rgd = kmem_cache_zalloc(gfs2_rgrpd_cachep, GFP_NOFS); |
6c53267f RP |
552 | error = -ENOMEM; |
553 | if (!rgd) | |
554 | return error; | |
555 | ||
556 | mutex_init(&rgd->rd_mutex); | |
557 | lops_init_le(&rgd->rd_le, &gfs2_rg_lops); | |
558 | rgd->rd_sbd = sdp; | |
559 | ||
560 | list_add_tail(&rgd->rd_list, &sdp->sd_rindex_list); | |
561 | list_add_tail(&rgd->rd_list_mru, &sdp->sd_rindex_mru_list); | |
562 | ||
bb8d8a6f | 563 | gfs2_rindex_in(rgd, buf); |
6c53267f RP |
564 | error = compute_bitstructs(rgd); |
565 | if (error) | |
566 | return error; | |
567 | ||
bb8d8a6f | 568 | error = gfs2_glock_get(sdp, rgd->rd_addr, |
6c53267f RP |
569 | &gfs2_rgrp_glops, CREATE, &rgd->rd_gl); |
570 | if (error) | |
571 | return error; | |
572 | ||
573 | rgd->rd_gl->gl_object = rgd; | |
cf45b752 | 574 | rgd->rd_flags &= ~GFS2_RDF_UPTODATE; |
c8cdf479 | 575 | rgd->rd_flags |= GFS2_RDF_CHECK; |
6c53267f RP |
576 | return error; |
577 | } | |
578 | ||
579 | /** | |
580 | * gfs2_ri_update - Pull in a new resource index from the disk | |
581 | * @ip: pointer to the rindex inode | |
582 | * | |
b3b94faa DT |
583 | * Returns: 0 on successful update, error code otherwise |
584 | */ | |
585 | ||
586 | static int gfs2_ri_update(struct gfs2_inode *ip) | |
587 | { | |
feaa7bba SW |
588 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
589 | struct inode *inode = &ip->i_inode; | |
f42faf4f | 590 | struct file_ra_state ra_state; |
c9e98886 | 591 | u64 rgrp_count = ip->i_disksize; |
b3b94faa DT |
592 | int error; |
593 | ||
cd81a4ba | 594 | if (do_div(rgrp_count, sizeof(struct gfs2_rindex))) { |
b3b94faa DT |
595 | gfs2_consist_inode(ip); |
596 | return -EIO; | |
597 | } | |
598 | ||
599 | clear_rgrpdi(sdp); | |
600 | ||
f42faf4f | 601 | file_ra_state_init(&ra_state, inode->i_mapping); |
cd81a4ba | 602 | for (sdp->sd_rgrps = 0; sdp->sd_rgrps < rgrp_count; sdp->sd_rgrps++) { |
6c53267f RP |
603 | error = read_rindex_entry(ip, &ra_state); |
604 | if (error) { | |
605 | clear_rgrpdi(sdp); | |
606 | return error; | |
b3b94faa | 607 | } |
6c53267f | 608 | } |
b3b94faa | 609 | |
cf45b752 | 610 | sdp->sd_rindex_uptodate = 1; |
6c53267f RP |
611 | return 0; |
612 | } | |
b3b94faa | 613 | |
6c53267f RP |
614 | /** |
615 | * gfs2_ri_update_special - Pull in a new resource index from the disk | |
616 | * | |
617 | * This is a special version that's safe to call from gfs2_inplace_reserve_i. | |
618 | * In this case we know that we don't have any resource groups in memory yet. | |
619 | * | |
620 | * @ip: pointer to the rindex inode | |
621 | * | |
622 | * Returns: 0 on successful update, error code otherwise | |
623 | */ | |
624 | static int gfs2_ri_update_special(struct gfs2_inode *ip) | |
625 | { | |
626 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
627 | struct inode *inode = &ip->i_inode; | |
628 | struct file_ra_state ra_state; | |
629 | int error; | |
b3b94faa | 630 | |
6c53267f RP |
631 | file_ra_state_init(&ra_state, inode->i_mapping); |
632 | for (sdp->sd_rgrps = 0;; sdp->sd_rgrps++) { | |
633 | /* Ignore partials */ | |
634 | if ((sdp->sd_rgrps + 1) * sizeof(struct gfs2_rindex) > | |
c9e98886 | 635 | ip->i_disksize) |
6c53267f RP |
636 | break; |
637 | error = read_rindex_entry(ip, &ra_state); | |
638 | if (error) { | |
639 | clear_rgrpdi(sdp); | |
640 | return error; | |
641 | } | |
b3b94faa DT |
642 | } |
643 | ||
cf45b752 | 644 | sdp->sd_rindex_uptodate = 1; |
b3b94faa | 645 | return 0; |
b3b94faa DT |
646 | } |
647 | ||
648 | /** | |
649 | * gfs2_rindex_hold - Grab a lock on the rindex | |
650 | * @sdp: The GFS2 superblock | |
651 | * @ri_gh: the glock holder | |
652 | * | |
653 | * We grab a lock on the rindex inode to make sure that it doesn't | |
654 | * change whilst we are performing an operation. We keep this lock | |
655 | * for quite long periods of time compared to other locks. This | |
656 | * doesn't matter, since it is shared and it is very, very rarely | |
657 | * accessed in the exclusive mode (i.e. only when expanding the filesystem). | |
658 | * | |
659 | * This makes sure that we're using the latest copy of the resource index | |
660 | * special file, which might have been updated if someone expanded the | |
661 | * filesystem (via gfs2_grow utility), which adds new resource groups. | |
662 | * | |
663 | * Returns: 0 on success, error code otherwise | |
664 | */ | |
665 | ||
666 | int gfs2_rindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ri_gh) | |
667 | { | |
feaa7bba | 668 | struct gfs2_inode *ip = GFS2_I(sdp->sd_rindex); |
b3b94faa DT |
669 | struct gfs2_glock *gl = ip->i_gl; |
670 | int error; | |
671 | ||
672 | error = gfs2_glock_nq_init(gl, LM_ST_SHARED, 0, ri_gh); | |
673 | if (error) | |
674 | return error; | |
675 | ||
676 | /* Read new copy from disk if we don't have the latest */ | |
cf45b752 | 677 | if (!sdp->sd_rindex_uptodate) { |
f55ab26a | 678 | mutex_lock(&sdp->sd_rindex_mutex); |
cf45b752 | 679 | if (!sdp->sd_rindex_uptodate) { |
b3b94faa DT |
680 | error = gfs2_ri_update(ip); |
681 | if (error) | |
682 | gfs2_glock_dq_uninit(ri_gh); | |
683 | } | |
f55ab26a | 684 | mutex_unlock(&sdp->sd_rindex_mutex); |
b3b94faa DT |
685 | } |
686 | ||
687 | return error; | |
688 | } | |
689 | ||
42d52e38 | 690 | static void gfs2_rgrp_in(struct gfs2_rgrpd *rgd, const void *buf) |
bb8d8a6f SW |
691 | { |
692 | const struct gfs2_rgrp *str = buf; | |
42d52e38 | 693 | u32 rg_flags; |
bb8d8a6f | 694 | |
42d52e38 BP |
695 | rg_flags = be32_to_cpu(str->rg_flags); |
696 | if (rg_flags & GFS2_RGF_NOALLOC) | |
697 | rgd->rd_flags |= GFS2_RDF_NOALLOC; | |
698 | else | |
699 | rgd->rd_flags &= ~GFS2_RDF_NOALLOC; | |
cfc8b549 | 700 | rgd->rd_free = be32_to_cpu(str->rg_free); |
73f74948 | 701 | rgd->rd_dinodes = be32_to_cpu(str->rg_dinodes); |
d8b71f73 | 702 | rgd->rd_igeneration = be64_to_cpu(str->rg_igeneration); |
bb8d8a6f SW |
703 | } |
704 | ||
42d52e38 | 705 | static void gfs2_rgrp_out(struct gfs2_rgrpd *rgd, void *buf) |
bb8d8a6f SW |
706 | { |
707 | struct gfs2_rgrp *str = buf; | |
42d52e38 | 708 | u32 rg_flags = 0; |
bb8d8a6f | 709 | |
42d52e38 BP |
710 | if (rgd->rd_flags & GFS2_RDF_NOALLOC) |
711 | rg_flags |= GFS2_RGF_NOALLOC; | |
712 | str->rg_flags = cpu_to_be32(rg_flags); | |
cfc8b549 | 713 | str->rg_free = cpu_to_be32(rgd->rd_free); |
73f74948 | 714 | str->rg_dinodes = cpu_to_be32(rgd->rd_dinodes); |
bb8d8a6f | 715 | str->__pad = cpu_to_be32(0); |
d8b71f73 | 716 | str->rg_igeneration = cpu_to_be64(rgd->rd_igeneration); |
bb8d8a6f SW |
717 | memset(&str->rg_reserved, 0, sizeof(str->rg_reserved)); |
718 | } | |
719 | ||
b3b94faa DT |
720 | /** |
721 | * gfs2_rgrp_bh_get - Read in a RG's header and bitmaps | |
722 | * @rgd: the struct gfs2_rgrpd describing the RG to read in | |
723 | * | |
724 | * Read in all of a Resource Group's header and bitmap blocks. | |
725 | * Caller must eventually call gfs2_rgrp_relse() to free the bitmaps. | |
726 | * | |
727 | * Returns: errno | |
728 | */ | |
729 | ||
730 | int gfs2_rgrp_bh_get(struct gfs2_rgrpd *rgd) | |
731 | { | |
732 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
733 | struct gfs2_glock *gl = rgd->rd_gl; | |
bb8d8a6f | 734 | unsigned int length = rgd->rd_length; |
b3b94faa DT |
735 | struct gfs2_bitmap *bi; |
736 | unsigned int x, y; | |
737 | int error; | |
738 | ||
f55ab26a | 739 | mutex_lock(&rgd->rd_mutex); |
b3b94faa DT |
740 | |
741 | spin_lock(&sdp->sd_rindex_spin); | |
742 | if (rgd->rd_bh_count) { | |
743 | rgd->rd_bh_count++; | |
744 | spin_unlock(&sdp->sd_rindex_spin); | |
f55ab26a | 745 | mutex_unlock(&rgd->rd_mutex); |
b3b94faa DT |
746 | return 0; |
747 | } | |
748 | spin_unlock(&sdp->sd_rindex_spin); | |
749 | ||
750 | for (x = 0; x < length; x++) { | |
751 | bi = rgd->rd_bits + x; | |
bb8d8a6f | 752 | error = gfs2_meta_read(gl, rgd->rd_addr + x, 0, &bi->bi_bh); |
b3b94faa DT |
753 | if (error) |
754 | goto fail; | |
755 | } | |
756 | ||
757 | for (y = length; y--;) { | |
758 | bi = rgd->rd_bits + y; | |
7276b3b0 | 759 | error = gfs2_meta_wait(sdp, bi->bi_bh); |
b3b94faa DT |
760 | if (error) |
761 | goto fail; | |
feaa7bba | 762 | if (gfs2_metatype_check(sdp, bi->bi_bh, y ? GFS2_METATYPE_RB : |
b3b94faa DT |
763 | GFS2_METATYPE_RG)) { |
764 | error = -EIO; | |
765 | goto fail; | |
766 | } | |
767 | } | |
768 | ||
cf45b752 | 769 | if (!(rgd->rd_flags & GFS2_RDF_UPTODATE)) { |
42d52e38 | 770 | gfs2_rgrp_in(rgd, (rgd->rd_bits[0].bi_bh)->b_data); |
cf45b752 | 771 | rgd->rd_flags |= GFS2_RDF_UPTODATE; |
b3b94faa DT |
772 | } |
773 | ||
774 | spin_lock(&sdp->sd_rindex_spin); | |
cfc8b549 | 775 | rgd->rd_free_clone = rgd->rd_free; |
b3b94faa DT |
776 | rgd->rd_bh_count++; |
777 | spin_unlock(&sdp->sd_rindex_spin); | |
778 | ||
f55ab26a | 779 | mutex_unlock(&rgd->rd_mutex); |
b3b94faa DT |
780 | |
781 | return 0; | |
782 | ||
feaa7bba | 783 | fail: |
b3b94faa DT |
784 | while (x--) { |
785 | bi = rgd->rd_bits + x; | |
786 | brelse(bi->bi_bh); | |
787 | bi->bi_bh = NULL; | |
788 | gfs2_assert_warn(sdp, !bi->bi_clone); | |
789 | } | |
f55ab26a | 790 | mutex_unlock(&rgd->rd_mutex); |
b3b94faa DT |
791 | |
792 | return error; | |
793 | } | |
794 | ||
795 | void gfs2_rgrp_bh_hold(struct gfs2_rgrpd *rgd) | |
796 | { | |
797 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
798 | ||
799 | spin_lock(&sdp->sd_rindex_spin); | |
800 | gfs2_assert_warn(rgd->rd_sbd, rgd->rd_bh_count); | |
801 | rgd->rd_bh_count++; | |
802 | spin_unlock(&sdp->sd_rindex_spin); | |
803 | } | |
804 | ||
805 | /** | |
806 | * gfs2_rgrp_bh_put - Release RG bitmaps read in with gfs2_rgrp_bh_get() | |
807 | * @rgd: the struct gfs2_rgrpd describing the RG to read in | |
808 | * | |
809 | */ | |
810 | ||
811 | void gfs2_rgrp_bh_put(struct gfs2_rgrpd *rgd) | |
812 | { | |
813 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
bb8d8a6f | 814 | int x, length = rgd->rd_length; |
b3b94faa DT |
815 | |
816 | spin_lock(&sdp->sd_rindex_spin); | |
817 | gfs2_assert_warn(rgd->rd_sbd, rgd->rd_bh_count); | |
818 | if (--rgd->rd_bh_count) { | |
819 | spin_unlock(&sdp->sd_rindex_spin); | |
820 | return; | |
821 | } | |
822 | ||
823 | for (x = 0; x < length; x++) { | |
824 | struct gfs2_bitmap *bi = rgd->rd_bits + x; | |
825 | kfree(bi->bi_clone); | |
826 | bi->bi_clone = NULL; | |
827 | brelse(bi->bi_bh); | |
828 | bi->bi_bh = NULL; | |
829 | } | |
830 | ||
831 | spin_unlock(&sdp->sd_rindex_spin); | |
832 | } | |
833 | ||
f15ab561 SW |
834 | static void gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset, |
835 | const struct gfs2_bitmap *bi) | |
836 | { | |
837 | struct super_block *sb = sdp->sd_vfs; | |
838 | struct block_device *bdev = sb->s_bdev; | |
839 | const unsigned int sects_per_blk = sdp->sd_sb.sb_bsize / | |
840 | bdev_hardsect_size(sb->s_bdev); | |
841 | u64 blk; | |
842 | sector_t start; | |
843 | sector_t nr_sects = 0; | |
844 | int rv; | |
845 | unsigned int x; | |
846 | ||
847 | for (x = 0; x < bi->bi_len; x++) { | |
848 | const u8 *orig = bi->bi_bh->b_data + bi->bi_offset + x; | |
849 | const u8 *clone = bi->bi_clone + bi->bi_offset + x; | |
850 | u8 diff = ~(*orig | (*orig >> 1)) & (*clone | (*clone >> 1)); | |
851 | diff &= 0x55; | |
852 | if (diff == 0) | |
853 | continue; | |
854 | blk = offset + ((bi->bi_start + x) * GFS2_NBBY); | |
855 | blk *= sects_per_blk; /* convert to sectors */ | |
856 | while(diff) { | |
857 | if (diff & 1) { | |
858 | if (nr_sects == 0) | |
859 | goto start_new_extent; | |
860 | if ((start + nr_sects) != blk) { | |
861 | rv = blkdev_issue_discard(bdev, start, | |
862 | nr_sects, GFP_NOFS); | |
863 | if (rv) | |
864 | goto fail; | |
865 | nr_sects = 0; | |
866 | start_new_extent: | |
867 | start = blk; | |
868 | } | |
869 | nr_sects += sects_per_blk; | |
870 | } | |
871 | diff >>= 2; | |
872 | blk += sects_per_blk; | |
873 | } | |
874 | } | |
875 | if (nr_sects) { | |
876 | rv = blkdev_issue_discard(bdev, start, nr_sects, GFP_NOFS); | |
877 | if (rv) | |
878 | goto fail; | |
879 | } | |
880 | return; | |
881 | fail: | |
882 | fs_warn(sdp, "error %d on discard request, turning discards off for this filesystem", rv); | |
883 | sdp->sd_args.ar_discard = 0; | |
884 | } | |
885 | ||
b3b94faa DT |
886 | void gfs2_rgrp_repolish_clones(struct gfs2_rgrpd *rgd) |
887 | { | |
888 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
bb8d8a6f | 889 | unsigned int length = rgd->rd_length; |
b3b94faa DT |
890 | unsigned int x; |
891 | ||
892 | for (x = 0; x < length; x++) { | |
893 | struct gfs2_bitmap *bi = rgd->rd_bits + x; | |
894 | if (!bi->bi_clone) | |
895 | continue; | |
f15ab561 SW |
896 | if (sdp->sd_args.ar_discard) |
897 | gfs2_rgrp_send_discards(sdp, rgd->rd_data0, bi); | |
b3b94faa | 898 | memcpy(bi->bi_clone + bi->bi_offset, |
feaa7bba | 899 | bi->bi_bh->b_data + bi->bi_offset, bi->bi_len); |
b3b94faa DT |
900 | } |
901 | ||
902 | spin_lock(&sdp->sd_rindex_spin); | |
cfc8b549 | 903 | rgd->rd_free_clone = rgd->rd_free; |
b3b94faa DT |
904 | spin_unlock(&sdp->sd_rindex_spin); |
905 | } | |
906 | ||
907 | /** | |
908 | * gfs2_alloc_get - get the struct gfs2_alloc structure for an inode | |
909 | * @ip: the incore GFS2 inode structure | |
910 | * | |
911 | * Returns: the struct gfs2_alloc | |
912 | */ | |
913 | ||
914 | struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip) | |
915 | { | |
6dbd8224 SW |
916 | BUG_ON(ip->i_alloc != NULL); |
917 | ip->i_alloc = kzalloc(sizeof(struct gfs2_alloc), GFP_KERNEL); | |
918 | return ip->i_alloc; | |
b3b94faa DT |
919 | } |
920 | ||
b3b94faa DT |
921 | /** |
922 | * try_rgrp_fit - See if a given reservation will fit in a given RG | |
923 | * @rgd: the RG data | |
924 | * @al: the struct gfs2_alloc structure describing the reservation | |
925 | * | |
926 | * If there's room for the requested blocks to be allocated from the RG: | |
b3b94faa DT |
927 | * Sets the $al_rgd field in @al. |
928 | * | |
929 | * Returns: 1 on success (it fits), 0 on failure (it doesn't fit) | |
930 | */ | |
931 | ||
932 | static int try_rgrp_fit(struct gfs2_rgrpd *rgd, struct gfs2_alloc *al) | |
933 | { | |
934 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
935 | int ret = 0; | |
936 | ||
42d52e38 | 937 | if (rgd->rd_flags & GFS2_RDF_NOALLOC) |
a43a4906 SW |
938 | return 0; |
939 | ||
b3b94faa DT |
940 | spin_lock(&sdp->sd_rindex_spin); |
941 | if (rgd->rd_free_clone >= al->al_requested) { | |
942 | al->al_rgd = rgd; | |
943 | ret = 1; | |
944 | } | |
945 | spin_unlock(&sdp->sd_rindex_spin); | |
946 | ||
947 | return ret; | |
948 | } | |
949 | ||
c8cdf479 SW |
950 | /** |
951 | * try_rgrp_unlink - Look for any unlinked, allocated, but unused inodes | |
952 | * @rgd: The rgrp | |
953 | * | |
954 | * Returns: The inode, if one has been found | |
955 | */ | |
956 | ||
957 | static struct inode *try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked) | |
958 | { | |
959 | struct inode *inode; | |
6760bdcd | 960 | u32 goal = 0, block; |
bb9bcf06 | 961 | u64 no_addr; |
5f3eae75 | 962 | struct gfs2_sbd *sdp = rgd->rd_sbd; |
b45e41d7 | 963 | unsigned int n; |
c8cdf479 SW |
964 | |
965 | for(;;) { | |
24c73873 BP |
966 | if (goal >= rgd->rd_data) |
967 | break; | |
5f3eae75 | 968 | down_write(&sdp->sd_log_flush_lock); |
b45e41d7 | 969 | n = 1; |
6760bdcd | 970 | block = rgblk_search(rgd, goal, GFS2_BLKST_UNLINKED, |
b45e41d7 | 971 | GFS2_BLKST_UNLINKED, &n); |
5f3eae75 | 972 | up_write(&sdp->sd_log_flush_lock); |
6760bdcd | 973 | if (block == BFITNOENT) |
24c73873 | 974 | break; |
6760bdcd BP |
975 | /* rgblk_search can return a block < goal, so we need to |
976 | keep it marching forward. */ | |
977 | no_addr = block + rgd->rd_data0; | |
24c73873 | 978 | goal++; |
6760bdcd | 979 | if (*last_unlinked != NO_BLOCK && no_addr <= *last_unlinked) |
c8cdf479 | 980 | continue; |
bb9bcf06 WC |
981 | *last_unlinked = no_addr; |
982 | inode = gfs2_inode_lookup(rgd->rd_sbd->sd_vfs, DT_UNKNOWN, | |
7a9f53b3 | 983 | no_addr, -1, 1); |
c8cdf479 SW |
984 | if (!IS_ERR(inode)) |
985 | return inode; | |
986 | } | |
987 | ||
988 | rgd->rd_flags &= ~GFS2_RDF_CHECK; | |
989 | return NULL; | |
990 | } | |
991 | ||
b3b94faa DT |
992 | /** |
993 | * recent_rgrp_next - get next RG from "recent" list | |
994 | * @cur_rgd: current rgrp | |
b3b94faa DT |
995 | * |
996 | * Returns: The next rgrp in the recent list | |
997 | */ | |
998 | ||
9cabcdbd | 999 | static struct gfs2_rgrpd *recent_rgrp_next(struct gfs2_rgrpd *cur_rgd) |
b3b94faa DT |
1000 | { |
1001 | struct gfs2_sbd *sdp = cur_rgd->rd_sbd; | |
1002 | struct list_head *head; | |
1003 | struct gfs2_rgrpd *rgd; | |
1004 | ||
1005 | spin_lock(&sdp->sd_rindex_spin); | |
9cabcdbd SW |
1006 | head = &sdp->sd_rindex_mru_list; |
1007 | if (unlikely(cur_rgd->rd_list_mru.next == head)) { | |
1008 | spin_unlock(&sdp->sd_rindex_spin); | |
1009 | return NULL; | |
b3b94faa | 1010 | } |
9cabcdbd | 1011 | rgd = list_entry(cur_rgd->rd_list_mru.next, struct gfs2_rgrpd, rd_list_mru); |
b3b94faa | 1012 | spin_unlock(&sdp->sd_rindex_spin); |
b3b94faa DT |
1013 | return rgd; |
1014 | } | |
1015 | ||
b3b94faa DT |
1016 | /** |
1017 | * forward_rgrp_get - get an rgrp to try next from full list | |
1018 | * @sdp: The GFS2 superblock | |
1019 | * | |
1020 | * Returns: The rgrp to try next | |
1021 | */ | |
1022 | ||
1023 | static struct gfs2_rgrpd *forward_rgrp_get(struct gfs2_sbd *sdp) | |
1024 | { | |
1025 | struct gfs2_rgrpd *rgd; | |
1026 | unsigned int journals = gfs2_jindex_size(sdp); | |
1027 | unsigned int rg = 0, x; | |
1028 | ||
1029 | spin_lock(&sdp->sd_rindex_spin); | |
1030 | ||
1031 | rgd = sdp->sd_rindex_forward; | |
1032 | if (!rgd) { | |
1033 | if (sdp->sd_rgrps >= journals) | |
1034 | rg = sdp->sd_rgrps * sdp->sd_jdesc->jd_jid / journals; | |
1035 | ||
b8e1aabf | 1036 | for (x = 0, rgd = gfs2_rgrpd_get_first(sdp); x < rg; |
b3b94faa DT |
1037 | x++, rgd = gfs2_rgrpd_get_next(rgd)) |
1038 | /* Do Nothing */; | |
1039 | ||
1040 | sdp->sd_rindex_forward = rgd; | |
1041 | } | |
1042 | ||
1043 | spin_unlock(&sdp->sd_rindex_spin); | |
1044 | ||
1045 | return rgd; | |
1046 | } | |
1047 | ||
1048 | /** | |
1049 | * forward_rgrp_set - set the forward rgrp pointer | |
1050 | * @sdp: the filesystem | |
1051 | * @rgd: The new forward rgrp | |
1052 | * | |
1053 | */ | |
1054 | ||
1055 | static void forward_rgrp_set(struct gfs2_sbd *sdp, struct gfs2_rgrpd *rgd) | |
1056 | { | |
1057 | spin_lock(&sdp->sd_rindex_spin); | |
1058 | sdp->sd_rindex_forward = rgd; | |
1059 | spin_unlock(&sdp->sd_rindex_spin); | |
1060 | } | |
1061 | ||
1062 | /** | |
1063 | * get_local_rgrp - Choose and lock a rgrp for allocation | |
1064 | * @ip: the inode to reserve space for | |
1065 | * @rgp: the chosen and locked rgrp | |
1066 | * | |
1067 | * Try to acquire rgrp in way which avoids contending with others. | |
1068 | * | |
1069 | * Returns: errno | |
1070 | */ | |
1071 | ||
c8cdf479 | 1072 | static struct inode *get_local_rgrp(struct gfs2_inode *ip, u64 *last_unlinked) |
b3b94faa | 1073 | { |
c8cdf479 | 1074 | struct inode *inode = NULL; |
feaa7bba | 1075 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1076 | struct gfs2_rgrpd *rgd, *begin = NULL; |
6dbd8224 | 1077 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
1078 | int flags = LM_FLAG_TRY; |
1079 | int skipped = 0; | |
1080 | int loops = 0; | |
292c8c14 | 1081 | int error, rg_locked; |
b3b94faa | 1082 | |
9cabcdbd | 1083 | rgd = gfs2_blk2rgrpd(sdp, ip->i_goal); |
b3b94faa DT |
1084 | |
1085 | while (rgd) { | |
292c8c14 AD |
1086 | rg_locked = 0; |
1087 | ||
1088 | if (gfs2_glock_is_locked_by_me(rgd->rd_gl)) { | |
1089 | rg_locked = 1; | |
1090 | error = 0; | |
1091 | } else { | |
1092 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, | |
1093 | LM_FLAG_TRY, &al->al_rgd_gh); | |
1094 | } | |
b3b94faa DT |
1095 | switch (error) { |
1096 | case 0: | |
1097 | if (try_rgrp_fit(rgd, al)) | |
1098 | goto out; | |
c8cdf479 SW |
1099 | if (rgd->rd_flags & GFS2_RDF_CHECK) |
1100 | inode = try_rgrp_unlink(rgd, last_unlinked); | |
292c8c14 AD |
1101 | if (!rg_locked) |
1102 | gfs2_glock_dq_uninit(&al->al_rgd_gh); | |
c8cdf479 SW |
1103 | if (inode) |
1104 | return inode; | |
9cabcdbd | 1105 | /* fall through */ |
b3b94faa | 1106 | case GLR_TRYFAILED: |
9cabcdbd | 1107 | rgd = recent_rgrp_next(rgd); |
b3b94faa DT |
1108 | break; |
1109 | ||
1110 | default: | |
c8cdf479 | 1111 | return ERR_PTR(error); |
b3b94faa DT |
1112 | } |
1113 | } | |
1114 | ||
1115 | /* Go through full list of rgrps */ | |
1116 | ||
1117 | begin = rgd = forward_rgrp_get(sdp); | |
1118 | ||
1119 | for (;;) { | |
292c8c14 AD |
1120 | rg_locked = 0; |
1121 | ||
1122 | if (gfs2_glock_is_locked_by_me(rgd->rd_gl)) { | |
1123 | rg_locked = 1; | |
1124 | error = 0; | |
1125 | } else { | |
1126 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, flags, | |
1127 | &al->al_rgd_gh); | |
1128 | } | |
b3b94faa DT |
1129 | switch (error) { |
1130 | case 0: | |
1131 | if (try_rgrp_fit(rgd, al)) | |
1132 | goto out; | |
c8cdf479 SW |
1133 | if (rgd->rd_flags & GFS2_RDF_CHECK) |
1134 | inode = try_rgrp_unlink(rgd, last_unlinked); | |
292c8c14 AD |
1135 | if (!rg_locked) |
1136 | gfs2_glock_dq_uninit(&al->al_rgd_gh); | |
c8cdf479 SW |
1137 | if (inode) |
1138 | return inode; | |
b3b94faa DT |
1139 | break; |
1140 | ||
1141 | case GLR_TRYFAILED: | |
1142 | skipped++; | |
1143 | break; | |
1144 | ||
1145 | default: | |
c8cdf479 | 1146 | return ERR_PTR(error); |
b3b94faa DT |
1147 | } |
1148 | ||
1149 | rgd = gfs2_rgrpd_get_next(rgd); | |
1150 | if (!rgd) | |
1151 | rgd = gfs2_rgrpd_get_first(sdp); | |
1152 | ||
1153 | if (rgd == begin) { | |
172e045a | 1154 | if (++loops >= 3) |
c8cdf479 | 1155 | return ERR_PTR(-ENOSPC); |
172e045a BM |
1156 | if (!skipped) |
1157 | loops++; | |
b3b94faa | 1158 | flags = 0; |
172e045a BM |
1159 | if (loops == 2) |
1160 | gfs2_log_flush(sdp, NULL); | |
b3b94faa DT |
1161 | } |
1162 | } | |
1163 | ||
feaa7bba | 1164 | out: |
b3b94faa | 1165 | if (begin) { |
9cabcdbd SW |
1166 | spin_lock(&sdp->sd_rindex_spin); |
1167 | list_move(&rgd->rd_list_mru, &sdp->sd_rindex_mru_list); | |
1168 | spin_unlock(&sdp->sd_rindex_spin); | |
b3b94faa DT |
1169 | rgd = gfs2_rgrpd_get_next(rgd); |
1170 | if (!rgd) | |
1171 | rgd = gfs2_rgrpd_get_first(sdp); | |
1172 | forward_rgrp_set(sdp, rgd); | |
1173 | } | |
1174 | ||
c8cdf479 | 1175 | return NULL; |
b3b94faa DT |
1176 | } |
1177 | ||
1178 | /** | |
1179 | * gfs2_inplace_reserve_i - Reserve space in the filesystem | |
1180 | * @ip: the inode to reserve space for | |
1181 | * | |
1182 | * Returns: errno | |
1183 | */ | |
1184 | ||
1185 | int gfs2_inplace_reserve_i(struct gfs2_inode *ip, char *file, unsigned int line) | |
1186 | { | |
feaa7bba | 1187 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 1188 | struct gfs2_alloc *al = ip->i_alloc; |
c8cdf479 | 1189 | struct inode *inode; |
7ae8fa84 | 1190 | int error = 0; |
6760bdcd | 1191 | u64 last_unlinked = NO_BLOCK; |
b3b94faa DT |
1192 | |
1193 | if (gfs2_assert_warn(sdp, al->al_requested)) | |
1194 | return -EINVAL; | |
1195 | ||
c8cdf479 | 1196 | try_again: |
7ae8fa84 RP |
1197 | /* We need to hold the rindex unless the inode we're using is |
1198 | the rindex itself, in which case it's already held. */ | |
1199 | if (ip != GFS2_I(sdp->sd_rindex)) | |
1200 | error = gfs2_rindex_hold(sdp, &al->al_ri_gh); | |
1201 | else if (!sdp->sd_rgrps) /* We may not have the rindex read in, so: */ | |
6c53267f | 1202 | error = gfs2_ri_update_special(ip); |
7ae8fa84 | 1203 | |
b3b94faa DT |
1204 | if (error) |
1205 | return error; | |
1206 | ||
c8cdf479 SW |
1207 | inode = get_local_rgrp(ip, &last_unlinked); |
1208 | if (inode) { | |
7ae8fa84 RP |
1209 | if (ip != GFS2_I(sdp->sd_rindex)) |
1210 | gfs2_glock_dq_uninit(&al->al_ri_gh); | |
c8cdf479 SW |
1211 | if (IS_ERR(inode)) |
1212 | return PTR_ERR(inode); | |
1213 | iput(inode); | |
1214 | gfs2_log_flush(sdp, NULL); | |
1215 | goto try_again; | |
b3b94faa DT |
1216 | } |
1217 | ||
1218 | al->al_file = file; | |
1219 | al->al_line = line; | |
1220 | ||
1221 | return 0; | |
1222 | } | |
1223 | ||
1224 | /** | |
1225 | * gfs2_inplace_release - release an inplace reservation | |
1226 | * @ip: the inode the reservation was taken out on | |
1227 | * | |
1228 | * Release a reservation made by gfs2_inplace_reserve(). | |
1229 | */ | |
1230 | ||
1231 | void gfs2_inplace_release(struct gfs2_inode *ip) | |
1232 | { | |
feaa7bba | 1233 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 1234 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
1235 | |
1236 | if (gfs2_assert_warn(sdp, al->al_alloced <= al->al_requested) == -1) | |
1237 | fs_warn(sdp, "al_alloced = %u, al_requested = %u " | |
1238 | "al_file = %s, al_line = %u\n", | |
1239 | al->al_alloced, al->al_requested, al->al_file, | |
1240 | al->al_line); | |
1241 | ||
1242 | al->al_rgd = NULL; | |
292c8c14 AD |
1243 | if (al->al_rgd_gh.gh_gl) |
1244 | gfs2_glock_dq_uninit(&al->al_rgd_gh); | |
7ae8fa84 RP |
1245 | if (ip != GFS2_I(sdp->sd_rindex)) |
1246 | gfs2_glock_dq_uninit(&al->al_ri_gh); | |
b3b94faa DT |
1247 | } |
1248 | ||
1249 | /** | |
1250 | * gfs2_get_block_type - Check a block in a RG is of given type | |
1251 | * @rgd: the resource group holding the block | |
1252 | * @block: the block number | |
1253 | * | |
1254 | * Returns: The block type (GFS2_BLKST_*) | |
1255 | */ | |
1256 | ||
cd915493 | 1257 | unsigned char gfs2_get_block_type(struct gfs2_rgrpd *rgd, u64 block) |
b3b94faa DT |
1258 | { |
1259 | struct gfs2_bitmap *bi = NULL; | |
cd915493 | 1260 | u32 length, rgrp_block, buf_block; |
b3b94faa DT |
1261 | unsigned int buf; |
1262 | unsigned char type; | |
1263 | ||
bb8d8a6f SW |
1264 | length = rgd->rd_length; |
1265 | rgrp_block = block - rgd->rd_data0; | |
b3b94faa DT |
1266 | |
1267 | for (buf = 0; buf < length; buf++) { | |
1268 | bi = rgd->rd_bits + buf; | |
1269 | if (rgrp_block < (bi->bi_start + bi->bi_len) * GFS2_NBBY) | |
1270 | break; | |
1271 | } | |
1272 | ||
1273 | gfs2_assert(rgd->rd_sbd, buf < length); | |
1274 | buf_block = rgrp_block - bi->bi_start * GFS2_NBBY; | |
1275 | ||
feaa7bba | 1276 | type = gfs2_testbit(rgd, bi->bi_bh->b_data + bi->bi_offset, |
b3b94faa DT |
1277 | bi->bi_len, buf_block); |
1278 | ||
1279 | return type; | |
1280 | } | |
1281 | ||
1282 | /** | |
1283 | * rgblk_search - find a block in @old_state, change allocation | |
1284 | * state to @new_state | |
1285 | * @rgd: the resource group descriptor | |
1286 | * @goal: the goal block within the RG (start here to search for avail block) | |
1287 | * @old_state: GFS2_BLKST_XXX the before-allocation state to find | |
1288 | * @new_state: GFS2_BLKST_XXX the after-allocation block state | |
b45e41d7 | 1289 | * @n: The extent length |
b3b94faa DT |
1290 | * |
1291 | * Walk rgrp's bitmap to find bits that represent a block in @old_state. | |
1292 | * Add the found bitmap buffer to the transaction. | |
1293 | * Set the found bits to @new_state to change block's allocation state. | |
1294 | * | |
1295 | * This function never fails, because we wouldn't call it unless we | |
1296 | * know (from reservation results, etc.) that a block is available. | |
1297 | * | |
1298 | * Scope of @goal and returned block is just within rgrp, not the whole | |
1299 | * filesystem. | |
1300 | * | |
1301 | * Returns: the block number allocated | |
1302 | */ | |
1303 | ||
cd915493 | 1304 | static u32 rgblk_search(struct gfs2_rgrpd *rgd, u32 goal, |
b45e41d7 SW |
1305 | unsigned char old_state, unsigned char new_state, |
1306 | unsigned int *n) | |
b3b94faa DT |
1307 | { |
1308 | struct gfs2_bitmap *bi = NULL; | |
b45e41d7 | 1309 | const u32 length = rgd->rd_length; |
cd915493 | 1310 | u32 blk = 0; |
b3b94faa | 1311 | unsigned int buf, x; |
b45e41d7 SW |
1312 | const unsigned int elen = *n; |
1313 | const u8 *buffer; | |
b3b94faa | 1314 | |
b45e41d7 | 1315 | *n = 0; |
b3b94faa DT |
1316 | /* Find bitmap block that contains bits for goal block */ |
1317 | for (buf = 0; buf < length; buf++) { | |
1318 | bi = rgd->rd_bits + buf; | |
1319 | if (goal < (bi->bi_start + bi->bi_len) * GFS2_NBBY) | |
1320 | break; | |
1321 | } | |
1322 | ||
1323 | gfs2_assert(rgd->rd_sbd, buf < length); | |
1324 | ||
1325 | /* Convert scope of "goal" from rgrp-wide to within found bit block */ | |
1326 | goal -= bi->bi_start * GFS2_NBBY; | |
1327 | ||
1328 | /* Search (up to entire) bitmap in this rgrp for allocatable block. | |
1329 | "x <= length", instead of "x < length", because we typically start | |
1330 | the search in the middle of a bit block, but if we can't find an | |
1331 | allocatable block anywhere else, we want to be able wrap around and | |
1332 | search in the first part of our first-searched bit block. */ | |
1333 | for (x = 0; x <= length; x++) { | |
5f3eae75 BP |
1334 | /* The GFS2_BLKST_UNLINKED state doesn't apply to the clone |
1335 | bitmaps, so we must search the originals for that. */ | |
b45e41d7 | 1336 | buffer = bi->bi_bh->b_data + bi->bi_offset; |
5f3eae75 | 1337 | if (old_state != GFS2_BLKST_UNLINKED && bi->bi_clone) |
110acf38 SW |
1338 | buffer = bi->bi_clone + bi->bi_offset; |
1339 | ||
1340 | blk = gfs2_bitfit(buffer, bi->bi_len, goal, old_state); | |
b3b94faa DT |
1341 | if (blk != BFITNOENT) |
1342 | break; | |
1343 | ||
1344 | /* Try next bitmap block (wrap back to rgrp header if at end) */ | |
1345 | buf = (buf + 1) % length; | |
1346 | bi = rgd->rd_bits + buf; | |
1347 | goal = 0; | |
1348 | } | |
1349 | ||
6760bdcd | 1350 | if (blk != BFITNOENT && old_state != new_state) { |
b45e41d7 | 1351 | *n = 1; |
c8cdf479 | 1352 | gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1); |
b45e41d7 | 1353 | gfs2_setbit(rgd, bi->bi_bh->b_data, bi->bi_clone, bi->bi_offset, |
b3b94faa | 1354 | bi->bi_len, blk, new_state); |
9b8c81d1 SW |
1355 | goal = blk; |
1356 | while (*n < elen) { | |
b45e41d7 | 1357 | goal++; |
9b8c81d1 | 1358 | if (goal >= (bi->bi_len * GFS2_NBBY)) |
b45e41d7 SW |
1359 | break; |
1360 | if (gfs2_testbit(rgd, buffer, bi->bi_len, goal) != | |
1361 | GFS2_BLKST_FREE) | |
1362 | break; | |
b45e41d7 | 1363 | gfs2_setbit(rgd, bi->bi_bh->b_data, bi->bi_clone, |
9b8c81d1 SW |
1364 | bi->bi_offset, bi->bi_len, goal, |
1365 | new_state); | |
1366 | (*n)++; | |
b45e41d7 | 1367 | } |
c8cdf479 | 1368 | } |
b3b94faa | 1369 | |
6eefaf61 | 1370 | return (blk == BFITNOENT) ? blk : (bi->bi_start * GFS2_NBBY) + blk; |
b3b94faa DT |
1371 | } |
1372 | ||
1373 | /** | |
1374 | * rgblk_free - Change alloc state of given block(s) | |
1375 | * @sdp: the filesystem | |
1376 | * @bstart: the start of a run of blocks to free | |
1377 | * @blen: the length of the block run (all must lie within ONE RG!) | |
1378 | * @new_state: GFS2_BLKST_XXX the after-allocation block state | |
1379 | * | |
1380 | * Returns: Resource group containing the block(s) | |
1381 | */ | |
1382 | ||
cd915493 SW |
1383 | static struct gfs2_rgrpd *rgblk_free(struct gfs2_sbd *sdp, u64 bstart, |
1384 | u32 blen, unsigned char new_state) | |
b3b94faa DT |
1385 | { |
1386 | struct gfs2_rgrpd *rgd; | |
1387 | struct gfs2_bitmap *bi = NULL; | |
cd915493 | 1388 | u32 length, rgrp_blk, buf_blk; |
b3b94faa DT |
1389 | unsigned int buf; |
1390 | ||
1391 | rgd = gfs2_blk2rgrpd(sdp, bstart); | |
1392 | if (!rgd) { | |
1393 | if (gfs2_consist(sdp)) | |
382066da | 1394 | fs_err(sdp, "block = %llu\n", (unsigned long long)bstart); |
b3b94faa DT |
1395 | return NULL; |
1396 | } | |
1397 | ||
bb8d8a6f | 1398 | length = rgd->rd_length; |
b3b94faa | 1399 | |
bb8d8a6f | 1400 | rgrp_blk = bstart - rgd->rd_data0; |
b3b94faa DT |
1401 | |
1402 | while (blen--) { | |
1403 | for (buf = 0; buf < length; buf++) { | |
1404 | bi = rgd->rd_bits + buf; | |
1405 | if (rgrp_blk < (bi->bi_start + bi->bi_len) * GFS2_NBBY) | |
1406 | break; | |
1407 | } | |
1408 | ||
1409 | gfs2_assert(rgd->rd_sbd, buf < length); | |
1410 | ||
1411 | buf_blk = rgrp_blk - bi->bi_start * GFS2_NBBY; | |
1412 | rgrp_blk++; | |
1413 | ||
1414 | if (!bi->bi_clone) { | |
1415 | bi->bi_clone = kmalloc(bi->bi_bh->b_size, | |
dd894be8 | 1416 | GFP_NOFS | __GFP_NOFAIL); |
b3b94faa DT |
1417 | memcpy(bi->bi_clone + bi->bi_offset, |
1418 | bi->bi_bh->b_data + bi->bi_offset, | |
1419 | bi->bi_len); | |
1420 | } | |
d4e9c4c3 | 1421 | gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1); |
b45e41d7 | 1422 | gfs2_setbit(rgd, bi->bi_bh->b_data, NULL, bi->bi_offset, |
b3b94faa DT |
1423 | bi->bi_len, buf_blk, new_state); |
1424 | } | |
1425 | ||
1426 | return rgd; | |
1427 | } | |
1428 | ||
1429 | /** | |
1639431a SW |
1430 | * gfs2_alloc_block - Allocate a block |
1431 | * @ip: the inode to allocate the block for | |
b3b94faa DT |
1432 | * |
1433 | * Returns: the allocated block | |
1434 | */ | |
1435 | ||
b45e41d7 | 1436 | u64 gfs2_alloc_block(struct gfs2_inode *ip, unsigned int *n) |
b3b94faa | 1437 | { |
feaa7bba | 1438 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 1439 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa | 1440 | struct gfs2_rgrpd *rgd = al->al_rgd; |
cd915493 SW |
1441 | u32 goal, blk; |
1442 | u64 block; | |
b3b94faa | 1443 | |
ce276b06 SW |
1444 | if (rgrp_contains_block(rgd, ip->i_goal)) |
1445 | goal = ip->i_goal - rgd->rd_data0; | |
b3b94faa | 1446 | else |
ac576cc5 | 1447 | goal = rgd->rd_last_alloc; |
b3b94faa | 1448 | |
b45e41d7 | 1449 | blk = rgblk_search(rgd, goal, GFS2_BLKST_FREE, GFS2_BLKST_USED, n); |
6eefaf61 | 1450 | BUG_ON(blk == BFITNOENT); |
b3b94faa | 1451 | |
b45e41d7 | 1452 | rgd->rd_last_alloc = blk; |
bb8d8a6f | 1453 | block = rgd->rd_data0 + blk; |
ce276b06 | 1454 | ip->i_goal = block; |
b3b94faa | 1455 | |
cfc8b549 SW |
1456 | gfs2_assert_withdraw(sdp, rgd->rd_free >= *n); |
1457 | rgd->rd_free -= *n; | |
b3b94faa | 1458 | |
d4e9c4c3 | 1459 | gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1); |
42d52e38 | 1460 | gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); |
b3b94faa | 1461 | |
b45e41d7 | 1462 | al->al_alloced += *n; |
b3b94faa | 1463 | |
ad99f777 | 1464 | gfs2_statfs_change(sdp, 0, -(s64)*n, 0); |
b45e41d7 | 1465 | gfs2_quota_change(ip, *n, ip->i_inode.i_uid, ip->i_inode.i_gid); |
b3b94faa DT |
1466 | |
1467 | spin_lock(&sdp->sd_rindex_spin); | |
b45e41d7 | 1468 | rgd->rd_free_clone -= *n; |
b3b94faa DT |
1469 | spin_unlock(&sdp->sd_rindex_spin); |
1470 | ||
1471 | return block; | |
1472 | } | |
1473 | ||
1474 | /** | |
1475 | * gfs2_alloc_di - Allocate a dinode | |
1476 | * @dip: the directory that the inode is going in | |
1477 | * | |
1478 | * Returns: the block allocated | |
1479 | */ | |
1480 | ||
4340fe62 | 1481 | u64 gfs2_alloc_di(struct gfs2_inode *dip, u64 *generation) |
b3b94faa | 1482 | { |
feaa7bba | 1483 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
6dbd8224 | 1484 | struct gfs2_alloc *al = dip->i_alloc; |
b3b94faa | 1485 | struct gfs2_rgrpd *rgd = al->al_rgd; |
4340fe62 SW |
1486 | u32 blk; |
1487 | u64 block; | |
b45e41d7 | 1488 | unsigned int n = 1; |
b3b94faa | 1489 | |
ac576cc5 | 1490 | blk = rgblk_search(rgd, rgd->rd_last_alloc, |
b45e41d7 | 1491 | GFS2_BLKST_FREE, GFS2_BLKST_DINODE, &n); |
6eefaf61 | 1492 | BUG_ON(blk == BFITNOENT); |
b3b94faa | 1493 | |
ac576cc5 | 1494 | rgd->rd_last_alloc = blk; |
b3b94faa | 1495 | |
bb8d8a6f | 1496 | block = rgd->rd_data0 + blk; |
b3b94faa | 1497 | |
cfc8b549 SW |
1498 | gfs2_assert_withdraw(sdp, rgd->rd_free); |
1499 | rgd->rd_free--; | |
73f74948 | 1500 | rgd->rd_dinodes++; |
d8b71f73 | 1501 | *generation = rgd->rd_igeneration++; |
d4e9c4c3 | 1502 | gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1); |
42d52e38 | 1503 | gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); |
b3b94faa DT |
1504 | |
1505 | al->al_alloced++; | |
1506 | ||
1507 | gfs2_statfs_change(sdp, 0, -1, +1); | |
5731be53 | 1508 | gfs2_trans_add_unrevoke(sdp, block, 1); |
b3b94faa DT |
1509 | |
1510 | spin_lock(&sdp->sd_rindex_spin); | |
1511 | rgd->rd_free_clone--; | |
1512 | spin_unlock(&sdp->sd_rindex_spin); | |
1513 | ||
1514 | return block; | |
1515 | } | |
1516 | ||
1517 | /** | |
1518 | * gfs2_free_data - free a contiguous run of data block(s) | |
1519 | * @ip: the inode these blocks are being freed from | |
1520 | * @bstart: first block of a run of contiguous blocks | |
1521 | * @blen: the length of the block run | |
1522 | * | |
1523 | */ | |
1524 | ||
cd915493 | 1525 | void gfs2_free_data(struct gfs2_inode *ip, u64 bstart, u32 blen) |
b3b94faa | 1526 | { |
feaa7bba | 1527 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1528 | struct gfs2_rgrpd *rgd; |
1529 | ||
1530 | rgd = rgblk_free(sdp, bstart, blen, GFS2_BLKST_FREE); | |
1531 | if (!rgd) | |
1532 | return; | |
1533 | ||
cfc8b549 | 1534 | rgd->rd_free += blen; |
b3b94faa | 1535 | |
d4e9c4c3 | 1536 | gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1); |
42d52e38 | 1537 | gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); |
b3b94faa DT |
1538 | |
1539 | gfs2_trans_add_rg(rgd); | |
1540 | ||
1541 | gfs2_statfs_change(sdp, 0, +blen, 0); | |
2933f925 | 1542 | gfs2_quota_change(ip, -(s64)blen, ip->i_inode.i_uid, ip->i_inode.i_gid); |
b3b94faa DT |
1543 | } |
1544 | ||
1545 | /** | |
1546 | * gfs2_free_meta - free a contiguous run of data block(s) | |
1547 | * @ip: the inode these blocks are being freed from | |
1548 | * @bstart: first block of a run of contiguous blocks | |
1549 | * @blen: the length of the block run | |
1550 | * | |
1551 | */ | |
1552 | ||
cd915493 | 1553 | void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen) |
b3b94faa | 1554 | { |
feaa7bba | 1555 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1556 | struct gfs2_rgrpd *rgd; |
1557 | ||
1558 | rgd = rgblk_free(sdp, bstart, blen, GFS2_BLKST_FREE); | |
1559 | if (!rgd) | |
1560 | return; | |
1561 | ||
cfc8b549 | 1562 | rgd->rd_free += blen; |
b3b94faa | 1563 | |
d4e9c4c3 | 1564 | gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1); |
42d52e38 | 1565 | gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); |
b3b94faa DT |
1566 | |
1567 | gfs2_trans_add_rg(rgd); | |
1568 | ||
1569 | gfs2_statfs_change(sdp, 0, +blen, 0); | |
2933f925 | 1570 | gfs2_quota_change(ip, -(s64)blen, ip->i_inode.i_uid, ip->i_inode.i_gid); |
b3b94faa DT |
1571 | gfs2_meta_wipe(ip, bstart, blen); |
1572 | } | |
1573 | ||
feaa7bba SW |
1574 | void gfs2_unlink_di(struct inode *inode) |
1575 | { | |
1576 | struct gfs2_inode *ip = GFS2_I(inode); | |
1577 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
1578 | struct gfs2_rgrpd *rgd; | |
dbb7cae2 | 1579 | u64 blkno = ip->i_no_addr; |
feaa7bba SW |
1580 | |
1581 | rgd = rgblk_free(sdp, blkno, 1, GFS2_BLKST_UNLINKED); | |
1582 | if (!rgd) | |
1583 | return; | |
1584 | gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1); | |
42d52e38 | 1585 | gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); |
feaa7bba SW |
1586 | gfs2_trans_add_rg(rgd); |
1587 | } | |
1588 | ||
cd915493 | 1589 | static void gfs2_free_uninit_di(struct gfs2_rgrpd *rgd, u64 blkno) |
b3b94faa DT |
1590 | { |
1591 | struct gfs2_sbd *sdp = rgd->rd_sbd; | |
1592 | struct gfs2_rgrpd *tmp_rgd; | |
1593 | ||
1594 | tmp_rgd = rgblk_free(sdp, blkno, 1, GFS2_BLKST_FREE); | |
1595 | if (!tmp_rgd) | |
1596 | return; | |
1597 | gfs2_assert_withdraw(sdp, rgd == tmp_rgd); | |
1598 | ||
73f74948 | 1599 | if (!rgd->rd_dinodes) |
b3b94faa | 1600 | gfs2_consist_rgrpd(rgd); |
73f74948 | 1601 | rgd->rd_dinodes--; |
cfc8b549 | 1602 | rgd->rd_free++; |
b3b94faa | 1603 | |
d4e9c4c3 | 1604 | gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1); |
42d52e38 | 1605 | gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data); |
b3b94faa DT |
1606 | |
1607 | gfs2_statfs_change(sdp, 0, +1, -1); | |
1608 | gfs2_trans_add_rg(rgd); | |
1609 | } | |
1610 | ||
b3b94faa DT |
1611 | |
1612 | void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip) | |
1613 | { | |
dbb7cae2 | 1614 | gfs2_free_uninit_di(rgd, ip->i_no_addr); |
2933f925 | 1615 | gfs2_quota_change(ip, -1, ip->i_inode.i_uid, ip->i_inode.i_gid); |
dbb7cae2 | 1616 | gfs2_meta_wipe(ip, ip->i_no_addr, 1); |
b3b94faa DT |
1617 | } |
1618 | ||
1619 | /** | |
1620 | * gfs2_rlist_add - add a RG to a list of RGs | |
1621 | * @sdp: the filesystem | |
1622 | * @rlist: the list of resource groups | |
1623 | * @block: the block | |
1624 | * | |
1625 | * Figure out what RG a block belongs to and add that RG to the list | |
1626 | * | |
1627 | * FIXME: Don't use NOFAIL | |
1628 | * | |
1629 | */ | |
1630 | ||
1631 | void gfs2_rlist_add(struct gfs2_sbd *sdp, struct gfs2_rgrp_list *rlist, | |
cd915493 | 1632 | u64 block) |
b3b94faa DT |
1633 | { |
1634 | struct gfs2_rgrpd *rgd; | |
1635 | struct gfs2_rgrpd **tmp; | |
1636 | unsigned int new_space; | |
1637 | unsigned int x; | |
1638 | ||
1639 | if (gfs2_assert_warn(sdp, !rlist->rl_ghs)) | |
1640 | return; | |
1641 | ||
1642 | rgd = gfs2_blk2rgrpd(sdp, block); | |
1643 | if (!rgd) { | |
1644 | if (gfs2_consist(sdp)) | |
382066da | 1645 | fs_err(sdp, "block = %llu\n", (unsigned long long)block); |
b3b94faa DT |
1646 | return; |
1647 | } | |
1648 | ||
1649 | for (x = 0; x < rlist->rl_rgrps; x++) | |
1650 | if (rlist->rl_rgd[x] == rgd) | |
1651 | return; | |
1652 | ||
1653 | if (rlist->rl_rgrps == rlist->rl_space) { | |
1654 | new_space = rlist->rl_space + 10; | |
1655 | ||
1656 | tmp = kcalloc(new_space, sizeof(struct gfs2_rgrpd *), | |
dd894be8 | 1657 | GFP_NOFS | __GFP_NOFAIL); |
b3b94faa DT |
1658 | |
1659 | if (rlist->rl_rgd) { | |
1660 | memcpy(tmp, rlist->rl_rgd, | |
1661 | rlist->rl_space * sizeof(struct gfs2_rgrpd *)); | |
1662 | kfree(rlist->rl_rgd); | |
1663 | } | |
1664 | ||
1665 | rlist->rl_space = new_space; | |
1666 | rlist->rl_rgd = tmp; | |
1667 | } | |
1668 | ||
1669 | rlist->rl_rgd[rlist->rl_rgrps++] = rgd; | |
1670 | } | |
1671 | ||
1672 | /** | |
1673 | * gfs2_rlist_alloc - all RGs have been added to the rlist, now allocate | |
1674 | * and initialize an array of glock holders for them | |
1675 | * @rlist: the list of resource groups | |
1676 | * @state: the lock state to acquire the RG lock in | |
1677 | * @flags: the modifier flags for the holder structures | |
1678 | * | |
1679 | * FIXME: Don't use NOFAIL | |
1680 | * | |
1681 | */ | |
1682 | ||
fe6c991c | 1683 | void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist, unsigned int state) |
b3b94faa DT |
1684 | { |
1685 | unsigned int x; | |
1686 | ||
1687 | rlist->rl_ghs = kcalloc(rlist->rl_rgrps, sizeof(struct gfs2_holder), | |
dd894be8 | 1688 | GFP_NOFS | __GFP_NOFAIL); |
b3b94faa DT |
1689 | for (x = 0; x < rlist->rl_rgrps; x++) |
1690 | gfs2_holder_init(rlist->rl_rgd[x]->rd_gl, | |
fe6c991c | 1691 | state, 0, |
b3b94faa DT |
1692 | &rlist->rl_ghs[x]); |
1693 | } | |
1694 | ||
1695 | /** | |
1696 | * gfs2_rlist_free - free a resource group list | |
1697 | * @list: the list of resource groups | |
1698 | * | |
1699 | */ | |
1700 | ||
1701 | void gfs2_rlist_free(struct gfs2_rgrp_list *rlist) | |
1702 | { | |
1703 | unsigned int x; | |
1704 | ||
1705 | kfree(rlist->rl_rgd); | |
1706 | ||
1707 | if (rlist->rl_ghs) { | |
1708 | for (x = 0; x < rlist->rl_rgrps; x++) | |
1709 | gfs2_holder_uninit(&rlist->rl_ghs[x]); | |
1710 | kfree(rlist->rl_ghs); | |
1711 | } | |
1712 | } | |
1713 |