]>
Commit | Line | Data |
---|---|---|
2b27bdcc | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1e51764a AB |
2 | /* |
3 | * This file is part of UBIFS. | |
4 | * | |
5 | * Copyright (C) 2006-2008 Nokia Corporation. | |
6 | * | |
1e51764a AB |
7 | * Authors: Artem Bityutskiy (Битюцкий Артём) |
8 | * Adrian Hunter | |
9 | */ | |
10 | ||
11 | /* | |
12 | * This file implements UBIFS superblock. The superblock is stored at the first | |
13 | * LEB of the volume and is never changed by UBIFS. Only user-space tools may | |
14 | * change it. The superblock node mostly contains geometry information. | |
15 | */ | |
16 | ||
17 | #include "ubifs.h" | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
4d61db4f | 19 | #include <linux/math64.h> |
8da4b8c4 | 20 | #include <linux/uuid.h> |
1e51764a AB |
21 | |
22 | /* | |
23 | * Default journal size in logical eraseblocks as a percent of total | |
24 | * flash size. | |
25 | */ | |
26 | #define DEFAULT_JNL_PERCENT 5 | |
27 | ||
28 | /* Default maximum journal size in bytes */ | |
29 | #define DEFAULT_MAX_JNL (32*1024*1024) | |
30 | ||
31 | /* Default indexing tree fanout */ | |
32 | #define DEFAULT_FANOUT 8 | |
33 | ||
34 | /* Default number of data journal heads */ | |
35 | #define DEFAULT_JHEADS_CNT 1 | |
36 | ||
37 | /* Default positions of different LEBs in the main area */ | |
38 | #define DEFAULT_IDX_LEB 0 | |
39 | #define DEFAULT_DATA_LEB 1 | |
40 | #define DEFAULT_GC_LEB 2 | |
41 | ||
42 | /* Default number of LEB numbers in LPT's save table */ | |
43 | #define DEFAULT_LSAVE_CNT 256 | |
44 | ||
45 | /* Default reserved pool size as a percent of maximum free space */ | |
46 | #define DEFAULT_RP_PERCENT 5 | |
47 | ||
48 | /* The default maximum size of reserved pool in bytes */ | |
49 | #define DEFAULT_MAX_RP_SIZE (5*1024*1024) | |
50 | ||
51 | /* Default time granularity in nanoseconds */ | |
52 | #define DEFAULT_TIME_GRAN 1000000000 | |
53 | ||
d62e98ed GJ |
54 | static int get_default_compressor(struct ubifs_info *c) |
55 | { | |
56 | if (ubifs_compr_present(c, UBIFS_COMPR_LZO)) | |
57 | return UBIFS_COMPR_LZO; | |
58 | ||
59 | if (ubifs_compr_present(c, UBIFS_COMPR_ZLIB)) | |
60 | return UBIFS_COMPR_ZLIB; | |
61 | ||
62 | return UBIFS_COMPR_NONE; | |
63 | } | |
64 | ||
1e51764a AB |
65 | /** |
66 | * create_default_filesystem - format empty UBI volume. | |
67 | * @c: UBIFS file-system description object | |
68 | * | |
69 | * This function creates default empty file-system. Returns zero in case of | |
70 | * success and a negative error code in case of failure. | |
71 | */ | |
72 | static int create_default_filesystem(struct ubifs_info *c) | |
73 | { | |
74 | struct ubifs_sb_node *sup; | |
75 | struct ubifs_mst_node *mst; | |
76 | struct ubifs_idx_node *idx; | |
77 | struct ubifs_branch *br; | |
78 | struct ubifs_ino_node *ino; | |
79 | struct ubifs_cs_node *cs; | |
80 | union ubifs_key key; | |
81 | int err, tmp, jnl_lebs, log_lebs, max_buds, main_lebs, main_first; | |
82 | int lpt_lebs, lpt_first, orph_lebs, big_lpt, ino_waste, sup_flags = 0; | |
83 | int min_leb_cnt = UBIFS_MIN_LEB_CNT; | |
c4de6d7e | 84 | int idx_node_size; |
4d61db4f | 85 | long long tmp64, main_bytes; |
0ecb9529 | 86 | __le64 tmp_le64; |
0eca0b80 | 87 | struct timespec64 ts; |
104115a3 | 88 | u8 hash[UBIFS_HASH_ARR_SZ]; |
b5b1f083 | 89 | u8 hash_lpt[UBIFS_HASH_ARR_SZ]; |
1e51764a AB |
90 | |
91 | /* Some functions called from here depend on the @c->key_len filed */ | |
92 | c->key_len = UBIFS_SK_LEN; | |
93 | ||
94 | /* | |
95 | * First of all, we have to calculate default file-system geometry - | |
96 | * log size, journal size, etc. | |
97 | */ | |
98 | if (c->leb_cnt < 0x7FFFFFFF / DEFAULT_JNL_PERCENT) | |
99 | /* We can first multiply then divide and have no overflow */ | |
100 | jnl_lebs = c->leb_cnt * DEFAULT_JNL_PERCENT / 100; | |
101 | else | |
102 | jnl_lebs = (c->leb_cnt / 100) * DEFAULT_JNL_PERCENT; | |
103 | ||
104 | if (jnl_lebs < UBIFS_MIN_JNL_LEBS) | |
105 | jnl_lebs = UBIFS_MIN_JNL_LEBS; | |
106 | if (jnl_lebs * c->leb_size > DEFAULT_MAX_JNL) | |
107 | jnl_lebs = DEFAULT_MAX_JNL / c->leb_size; | |
108 | ||
109 | /* | |
110 | * The log should be large enough to fit reference nodes for all bud | |
111 | * LEBs. Because buds do not have to start from the beginning of LEBs | |
112 | * (half of the LEB may contain committed data), the log should | |
113 | * generally be larger, make it twice as large. | |
114 | */ | |
115 | tmp = 2 * (c->ref_node_alsz * jnl_lebs) + c->leb_size - 1; | |
116 | log_lebs = tmp / c->leb_size; | |
117 | /* Plus one LEB reserved for commit */ | |
118 | log_lebs += 1; | |
119 | if (c->leb_cnt - min_leb_cnt > 8) { | |
120 | /* And some extra space to allow writes while committing */ | |
121 | log_lebs += 1; | |
122 | min_leb_cnt += 1; | |
123 | } | |
124 | ||
125 | max_buds = jnl_lebs - log_lebs; | |
126 | if (max_buds < UBIFS_MIN_BUD_LEBS) | |
127 | max_buds = UBIFS_MIN_BUD_LEBS; | |
128 | ||
129 | /* | |
130 | * Orphan nodes are stored in a separate area. One node can store a lot | |
131 | * of orphan inode numbers, but when new orphan comes we just add a new | |
132 | * orphan node. At some point the nodes are consolidated into one | |
133 | * orphan node. | |
134 | */ | |
135 | orph_lebs = UBIFS_MIN_ORPH_LEBS; | |
1e51764a AB |
136 | if (c->leb_cnt - min_leb_cnt > 1) |
137 | /* | |
138 | * For debugging purposes it is better to have at least 2 | |
139 | * orphan LEBs, because the orphan subsystem would need to do | |
140 | * consolidations and would be stressed more. | |
141 | */ | |
142 | orph_lebs += 1; | |
1e51764a AB |
143 | |
144 | main_lebs = c->leb_cnt - UBIFS_SB_LEBS - UBIFS_MST_LEBS - log_lebs; | |
145 | main_lebs -= orph_lebs; | |
146 | ||
147 | lpt_first = UBIFS_LOG_LNUM + log_lebs; | |
148 | c->lsave_cnt = DEFAULT_LSAVE_CNT; | |
149 | c->max_leb_cnt = c->leb_cnt; | |
150 | err = ubifs_create_dflt_lpt(c, &main_lebs, lpt_first, &lpt_lebs, | |
b5b1f083 | 151 | &big_lpt, hash_lpt); |
1e51764a AB |
152 | if (err) |
153 | return err; | |
154 | ||
155 | dbg_gen("LEB Properties Tree created (LEBs %d-%d)", lpt_first, | |
156 | lpt_first + lpt_lebs - 1); | |
157 | ||
158 | main_first = c->leb_cnt - main_lebs; | |
159 | ||
c4de6d7e SH |
160 | sup = kzalloc(ALIGN(UBIFS_SB_NODE_SZ, c->min_io_size), GFP_KERNEL); |
161 | mst = kzalloc(c->mst_node_alsz, GFP_KERNEL); | |
162 | idx_node_size = ubifs_idx_node_sz(c, 1); | |
edec5137 | 163 | idx = kzalloc(ALIGN(idx_node_size, c->min_io_size), GFP_KERNEL); |
c4de6d7e SH |
164 | ino = kzalloc(ALIGN(UBIFS_INO_NODE_SZ, c->min_io_size), GFP_KERNEL); |
165 | cs = kzalloc(ALIGN(UBIFS_CS_NODE_SZ, c->min_io_size), GFP_KERNEL); | |
166 | ||
167 | if (!sup || !mst || !idx || !ino || !cs) { | |
168 | err = -ENOMEM; | |
169 | goto out; | |
170 | } | |
171 | ||
1e51764a | 172 | /* Create default superblock */ |
1e51764a | 173 | |
4d61db4f | 174 | tmp64 = (long long)max_buds * c->leb_size; |
1e51764a AB |
175 | if (big_lpt) |
176 | sup_flags |= UBIFS_FLG_BIGLPT; | |
d63d61c1 | 177 | sup_flags |= UBIFS_FLG_DOUBLE_HASH; |
1e51764a | 178 | |
104115a3 SH |
179 | if (ubifs_authenticated(c)) { |
180 | sup_flags |= UBIFS_FLG_AUTHENTICATION; | |
181 | sup->hash_algo = cpu_to_le16(c->auth_hash_algo); | |
182 | err = ubifs_hmac_wkm(c, sup->hmac_wkm); | |
183 | if (err) | |
184 | goto out; | |
185 | } else { | |
7cc7720f | 186 | sup->hash_algo = cpu_to_le16(0xffff); |
104115a3 SH |
187 | } |
188 | ||
1e51764a AB |
189 | sup->ch.node_type = UBIFS_SB_NODE; |
190 | sup->key_hash = UBIFS_KEY_HASH_R5; | |
191 | sup->flags = cpu_to_le32(sup_flags); | |
192 | sup->min_io_size = cpu_to_le32(c->min_io_size); | |
193 | sup->leb_size = cpu_to_le32(c->leb_size); | |
194 | sup->leb_cnt = cpu_to_le32(c->leb_cnt); | |
195 | sup->max_leb_cnt = cpu_to_le32(c->max_leb_cnt); | |
196 | sup->max_bud_bytes = cpu_to_le64(tmp64); | |
197 | sup->log_lebs = cpu_to_le32(log_lebs); | |
198 | sup->lpt_lebs = cpu_to_le32(lpt_lebs); | |
199 | sup->orph_lebs = cpu_to_le32(orph_lebs); | |
200 | sup->jhead_cnt = cpu_to_le32(DEFAULT_JHEADS_CNT); | |
201 | sup->fanout = cpu_to_le32(DEFAULT_FANOUT); | |
202 | sup->lsave_cnt = cpu_to_le32(c->lsave_cnt); | |
203 | sup->fmt_version = cpu_to_le32(UBIFS_FORMAT_VERSION); | |
1e51764a | 204 | sup->time_gran = cpu_to_le32(DEFAULT_TIME_GRAN); |
553dea4d AB |
205 | if (c->mount_opts.override_compr) |
206 | sup->default_compr = cpu_to_le16(c->mount_opts.compr_type); | |
207 | else | |
d62e98ed | 208 | sup->default_compr = cpu_to_le16(get_default_compressor(c)); |
1e51764a AB |
209 | |
210 | generate_random_uuid(sup->uuid); | |
211 | ||
4d61db4f AB |
212 | main_bytes = (long long)main_lebs * c->leb_size; |
213 | tmp64 = div_u64(main_bytes * DEFAULT_RP_PERCENT, 100); | |
1e51764a AB |
214 | if (tmp64 > DEFAULT_MAX_RP_SIZE) |
215 | tmp64 = DEFAULT_MAX_RP_SIZE; | |
216 | sup->rp_size = cpu_to_le64(tmp64); | |
963f0cf6 | 217 | sup->ro_compat_version = cpu_to_le32(UBIFS_RO_COMPAT_VERSION); |
1e51764a | 218 | |
1e51764a AB |
219 | dbg_gen("default superblock created at LEB 0:0"); |
220 | ||
221 | /* Create default master node */ | |
1e51764a AB |
222 | |
223 | mst->ch.node_type = UBIFS_MST_NODE; | |
224 | mst->log_lnum = cpu_to_le32(UBIFS_LOG_LNUM); | |
225 | mst->highest_inum = cpu_to_le64(UBIFS_FIRST_INO); | |
226 | mst->cmt_no = 0; | |
227 | mst->root_lnum = cpu_to_le32(main_first + DEFAULT_IDX_LEB); | |
228 | mst->root_offs = 0; | |
229 | tmp = ubifs_idx_node_sz(c, 1); | |
230 | mst->root_len = cpu_to_le32(tmp); | |
231 | mst->gc_lnum = cpu_to_le32(main_first + DEFAULT_GC_LEB); | |
232 | mst->ihead_lnum = cpu_to_le32(main_first + DEFAULT_IDX_LEB); | |
233 | mst->ihead_offs = cpu_to_le32(ALIGN(tmp, c->min_io_size)); | |
234 | mst->index_size = cpu_to_le64(ALIGN(tmp, 8)); | |
235 | mst->lpt_lnum = cpu_to_le32(c->lpt_lnum); | |
236 | mst->lpt_offs = cpu_to_le32(c->lpt_offs); | |
237 | mst->nhead_lnum = cpu_to_le32(c->nhead_lnum); | |
238 | mst->nhead_offs = cpu_to_le32(c->nhead_offs); | |
239 | mst->ltab_lnum = cpu_to_le32(c->ltab_lnum); | |
240 | mst->ltab_offs = cpu_to_le32(c->ltab_offs); | |
241 | mst->lsave_lnum = cpu_to_le32(c->lsave_lnum); | |
242 | mst->lsave_offs = cpu_to_le32(c->lsave_offs); | |
243 | mst->lscan_lnum = cpu_to_le32(main_first); | |
244 | mst->empty_lebs = cpu_to_le32(main_lebs - 2); | |
245 | mst->idx_lebs = cpu_to_le32(1); | |
246 | mst->leb_cnt = cpu_to_le32(c->leb_cnt); | |
104115a3 | 247 | ubifs_copy_hash(c, hash_lpt, mst->hash_lpt); |
1e51764a AB |
248 | |
249 | /* Calculate lprops statistics */ | |
250 | tmp64 = main_bytes; | |
251 | tmp64 -= ALIGN(ubifs_idx_node_sz(c, 1), c->min_io_size); | |
252 | tmp64 -= ALIGN(UBIFS_INO_NODE_SZ, c->min_io_size); | |
253 | mst->total_free = cpu_to_le64(tmp64); | |
254 | ||
255 | tmp64 = ALIGN(ubifs_idx_node_sz(c, 1), c->min_io_size); | |
256 | ino_waste = ALIGN(UBIFS_INO_NODE_SZ, c->min_io_size) - | |
257 | UBIFS_INO_NODE_SZ; | |
258 | tmp64 += ino_waste; | |
259 | tmp64 -= ALIGN(ubifs_idx_node_sz(c, 1), 8); | |
260 | mst->total_dirty = cpu_to_le64(tmp64); | |
261 | ||
262 | /* The indexing LEB does not contribute to dark space */ | |
7606f85a | 263 | tmp64 = ((long long)(c->main_lebs - 1) * c->dark_wm); |
1e51764a AB |
264 | mst->total_dark = cpu_to_le64(tmp64); |
265 | ||
266 | mst->total_used = cpu_to_le64(UBIFS_INO_NODE_SZ); | |
267 | ||
1e51764a AB |
268 | dbg_gen("default master node created at LEB %d:0", UBIFS_MST_LNUM); |
269 | ||
270 | /* Create the root indexing node */ | |
1e51764a AB |
271 | |
272 | c->key_fmt = UBIFS_SIMPLE_KEY_FMT; | |
273 | c->key_hash = key_r5_hash; | |
274 | ||
275 | idx->ch.node_type = UBIFS_IDX_NODE; | |
276 | idx->child_cnt = cpu_to_le16(1); | |
277 | ino_key_init(c, &key, UBIFS_ROOT_INO); | |
278 | br = ubifs_idx_branch(c, idx, 0); | |
279 | key_write_idx(c, &key, &br->key); | |
280 | br->lnum = cpu_to_le32(main_first + DEFAULT_DATA_LEB); | |
281 | br->len = cpu_to_le32(UBIFS_INO_NODE_SZ); | |
1e51764a AB |
282 | |
283 | dbg_gen("default root indexing node created LEB %d:0", | |
284 | main_first + DEFAULT_IDX_LEB); | |
285 | ||
286 | /* Create default root inode */ | |
1e51764a AB |
287 | |
288 | ino_key_init_flash(c, &ino->key, UBIFS_ROOT_INO); | |
289 | ino->ch.node_type = UBIFS_INO_NODE; | |
290 | ino->creat_sqnum = cpu_to_le64(++c->max_sqnum); | |
291 | ino->nlink = cpu_to_le32(2); | |
607a11ad | 292 | |
1bfad0c0 | 293 | ktime_get_coarse_real_ts64(&ts); |
607a11ad | 294 | tmp_le64 = cpu_to_le64(ts.tv_sec); |
0ecb9529 HH |
295 | ino->atime_sec = tmp_le64; |
296 | ino->ctime_sec = tmp_le64; | |
297 | ino->mtime_sec = tmp_le64; | |
1bfad0c0 DD |
298 | ino->atime_nsec = 0; |
299 | ino->ctime_nsec = 0; | |
300 | ino->mtime_nsec = 0; | |
1e51764a AB |
301 | ino->mode = cpu_to_le32(S_IFDIR | S_IRUGO | S_IWUSR | S_IXUGO); |
302 | ino->size = cpu_to_le64(UBIFS_INO_NODE_SZ); | |
303 | ||
304 | /* Set compression enabled by default */ | |
305 | ino->flags = cpu_to_le32(UBIFS_COMPR_FL); | |
306 | ||
1e51764a AB |
307 | dbg_gen("root inode created at LEB %d:0", |
308 | main_first + DEFAULT_DATA_LEB); | |
309 | ||
310 | /* | |
311 | * The first node in the log has to be the commit start node. This is | |
312 | * always the case during normal file-system operation. Write a fake | |
313 | * commit start node to the log. | |
314 | */ | |
1e51764a AB |
315 | |
316 | cs->ch.node_type = UBIFS_CS_NODE; | |
c4de6d7e | 317 | |
104115a3 SH |
318 | err = ubifs_write_node_hmac(c, sup, UBIFS_SB_NODE_SZ, 0, 0, |
319 | offsetof(struct ubifs_sb_node, hmac)); | |
c4de6d7e SH |
320 | if (err) |
321 | goto out; | |
322 | ||
104115a3 SH |
323 | err = ubifs_write_node(c, ino, UBIFS_INO_NODE_SZ, |
324 | main_first + DEFAULT_DATA_LEB, 0); | |
c4de6d7e SH |
325 | if (err) |
326 | goto out; | |
327 | ||
104115a3 SH |
328 | ubifs_node_calc_hash(c, ino, hash); |
329 | ubifs_copy_hash(c, hash, ubifs_branch_hash(c, br)); | |
330 | ||
331 | err = ubifs_write_node(c, idx, idx_node_size, main_first + DEFAULT_IDX_LEB, 0); | |
c4de6d7e SH |
332 | if (err) |
333 | goto out; | |
334 | ||
104115a3 SH |
335 | ubifs_node_calc_hash(c, idx, hash); |
336 | ubifs_copy_hash(c, hash, mst->hash_root_idx); | |
337 | ||
338 | err = ubifs_write_node_hmac(c, mst, UBIFS_MST_NODE_SZ, UBIFS_MST_LNUM, 0, | |
339 | offsetof(struct ubifs_mst_node, hmac)); | |
c4de6d7e SH |
340 | if (err) |
341 | goto out; | |
342 | ||
104115a3 SH |
343 | err = ubifs_write_node_hmac(c, mst, UBIFS_MST_NODE_SZ, UBIFS_MST_LNUM + 1, |
344 | 0, offsetof(struct ubifs_mst_node, hmac)); | |
c4de6d7e SH |
345 | if (err) |
346 | goto out; | |
347 | ||
b36a261e | 348 | err = ubifs_write_node(c, cs, UBIFS_CS_NODE_SZ, UBIFS_LOG_LNUM, 0); |
6dcfb802 | 349 | if (err) |
c4de6d7e | 350 | goto out; |
1e51764a | 351 | |
235c362b | 352 | ubifs_msg(c, "default file-system created"); |
c4de6d7e SH |
353 | |
354 | err = 0; | |
355 | out: | |
356 | kfree(sup); | |
357 | kfree(mst); | |
358 | kfree(idx); | |
359 | kfree(ino); | |
360 | kfree(cs); | |
361 | ||
362 | return err; | |
1e51764a AB |
363 | } |
364 | ||
365 | /** | |
366 | * validate_sb - validate superblock node. | |
367 | * @c: UBIFS file-system description object | |
368 | * @sup: superblock node | |
369 | * | |
370 | * This function validates superblock node @sup. Since most of data was read | |
371 | * from the superblock and stored in @c, the function validates fields in @c | |
372 | * instead. Returns zero in case of success and %-EINVAL in case of validation | |
373 | * failure. | |
374 | */ | |
375 | static int validate_sb(struct ubifs_info *c, struct ubifs_sb_node *sup) | |
376 | { | |
377 | long long max_bytes; | |
378 | int err = 1, min_leb_cnt; | |
379 | ||
380 | if (!c->key_hash) { | |
381 | err = 2; | |
382 | goto failed; | |
383 | } | |
384 | ||
385 | if (sup->key_fmt != UBIFS_SIMPLE_KEY_FMT) { | |
386 | err = 3; | |
387 | goto failed; | |
388 | } | |
389 | ||
390 | if (le32_to_cpu(sup->min_io_size) != c->min_io_size) { | |
235c362b | 391 | ubifs_err(c, "min. I/O unit mismatch: %d in superblock, %d real", |
1e51764a AB |
392 | le32_to_cpu(sup->min_io_size), c->min_io_size); |
393 | goto failed; | |
394 | } | |
395 | ||
396 | if (le32_to_cpu(sup->leb_size) != c->leb_size) { | |
235c362b | 397 | ubifs_err(c, "LEB size mismatch: %d in superblock, %d real", |
1e51764a AB |
398 | le32_to_cpu(sup->leb_size), c->leb_size); |
399 | goto failed; | |
400 | } | |
401 | ||
402 | if (c->log_lebs < UBIFS_MIN_LOG_LEBS || | |
403 | c->lpt_lebs < UBIFS_MIN_LPT_LEBS || | |
404 | c->orph_lebs < UBIFS_MIN_ORPH_LEBS || | |
405 | c->main_lebs < UBIFS_MIN_MAIN_LEBS) { | |
406 | err = 4; | |
407 | goto failed; | |
408 | } | |
409 | ||
410 | /* | |
411 | * Calculate minimum allowed amount of main area LEBs. This is very | |
412 | * similar to %UBIFS_MIN_LEB_CNT, but we take into account real what we | |
413 | * have just read from the superblock. | |
414 | */ | |
415 | min_leb_cnt = UBIFS_SB_LEBS + UBIFS_MST_LEBS + c->log_lebs; | |
416 | min_leb_cnt += c->lpt_lebs + c->orph_lebs + c->jhead_cnt + 6; | |
417 | ||
418 | if (c->leb_cnt < min_leb_cnt || c->leb_cnt > c->vi.size) { | |
235c362b | 419 | ubifs_err(c, "bad LEB count: %d in superblock, %d on UBI volume, %d minimum required", |
79fda517 | 420 | c->leb_cnt, c->vi.size, min_leb_cnt); |
1e51764a AB |
421 | goto failed; |
422 | } | |
423 | ||
424 | if (c->max_leb_cnt < c->leb_cnt) { | |
235c362b | 425 | ubifs_err(c, "max. LEB count %d less than LEB count %d", |
1e51764a AB |
426 | c->max_leb_cnt, c->leb_cnt); |
427 | goto failed; | |
428 | } | |
429 | ||
430 | if (c->main_lebs < UBIFS_MIN_MAIN_LEBS) { | |
235c362b | 431 | ubifs_err(c, "too few main LEBs count %d, must be at least %d", |
5a1f36c9 | 432 | c->main_lebs, UBIFS_MIN_MAIN_LEBS); |
1e51764a AB |
433 | goto failed; |
434 | } | |
435 | ||
5a1f36c9 AB |
436 | max_bytes = (long long)c->leb_size * UBIFS_MIN_BUD_LEBS; |
437 | if (c->max_bud_bytes < max_bytes) { | |
235c362b | 438 | ubifs_err(c, "too small journal (%lld bytes), must be at least %lld bytes", |
79fda517 | 439 | c->max_bud_bytes, max_bytes); |
5a1f36c9 AB |
440 | goto failed; |
441 | } | |
442 | ||
443 | max_bytes = (long long)c->leb_size * c->main_lebs; | |
444 | if (c->max_bud_bytes > max_bytes) { | |
235c362b | 445 | ubifs_err(c, "too large journal size (%lld bytes), only %lld bytes available in the main area", |
5a1f36c9 | 446 | c->max_bud_bytes, max_bytes); |
1e51764a AB |
447 | goto failed; |
448 | } | |
449 | ||
450 | if (c->jhead_cnt < NONDATA_JHEADS_CNT + 1 || | |
451 | c->jhead_cnt > NONDATA_JHEADS_CNT + UBIFS_MAX_JHEADS) { | |
452 | err = 9; | |
453 | goto failed; | |
454 | } | |
455 | ||
456 | if (c->fanout < UBIFS_MIN_FANOUT || | |
457 | ubifs_idx_node_sz(c, c->fanout) > c->leb_size) { | |
458 | err = 10; | |
459 | goto failed; | |
460 | } | |
461 | ||
462 | if (c->lsave_cnt < 0 || (c->lsave_cnt > DEFAULT_LSAVE_CNT && | |
463 | c->lsave_cnt > c->max_leb_cnt - UBIFS_SB_LEBS - UBIFS_MST_LEBS - | |
464 | c->log_lebs - c->lpt_lebs - c->orph_lebs)) { | |
465 | err = 11; | |
466 | goto failed; | |
467 | } | |
468 | ||
469 | if (UBIFS_SB_LEBS + UBIFS_MST_LEBS + c->log_lebs + c->lpt_lebs + | |
470 | c->orph_lebs + c->main_lebs != c->leb_cnt) { | |
471 | err = 12; | |
472 | goto failed; | |
473 | } | |
474 | ||
b793a8c8 | 475 | if (c->default_compr >= UBIFS_COMPR_TYPES_CNT) { |
1e51764a AB |
476 | err = 13; |
477 | goto failed; | |
478 | } | |
479 | ||
1e51764a AB |
480 | if (c->rp_size < 0 || max_bytes < c->rp_size) { |
481 | err = 14; | |
482 | goto failed; | |
483 | } | |
484 | ||
485 | if (le32_to_cpu(sup->time_gran) > 1000000000 || | |
486 | le32_to_cpu(sup->time_gran) < 1) { | |
487 | err = 15; | |
488 | goto failed; | |
489 | } | |
490 | ||
fc4b891b RW |
491 | if (!c->double_hash && c->fmt_version >= 5) { |
492 | err = 16; | |
493 | goto failed; | |
494 | } | |
495 | ||
496 | if (c->encrypted && c->fmt_version < 5) { | |
497 | err = 17; | |
498 | goto failed; | |
499 | } | |
500 | ||
1e51764a AB |
501 | return 0; |
502 | ||
503 | failed: | |
235c362b | 504 | ubifs_err(c, "bad superblock, error %d", err); |
edf6be24 | 505 | ubifs_dump_node(c, sup); |
1e51764a AB |
506 | return -EINVAL; |
507 | } | |
508 | ||
509 | /** | |
510 | * ubifs_read_sb_node - read superblock node. | |
511 | * @c: UBIFS file-system description object | |
512 | * | |
513 | * This function returns a pointer to the superblock node or a negative error | |
eaeee242 AB |
514 | * code. Note, the user of this function is responsible of kfree()'ing the |
515 | * returned superblock buffer. | |
1e51764a | 516 | */ |
fd615005 | 517 | static struct ubifs_sb_node *ubifs_read_sb_node(struct ubifs_info *c) |
1e51764a AB |
518 | { |
519 | struct ubifs_sb_node *sup; | |
520 | int err; | |
521 | ||
522 | sup = kmalloc(ALIGN(UBIFS_SB_NODE_SZ, c->min_io_size), GFP_NOFS); | |
523 | if (!sup) | |
524 | return ERR_PTR(-ENOMEM); | |
525 | ||
526 | err = ubifs_read_node(c, sup, UBIFS_SB_NODE, UBIFS_SB_NODE_SZ, | |
527 | UBIFS_SB_LNUM, 0); | |
528 | if (err) { | |
529 | kfree(sup); | |
530 | return ERR_PTR(err); | |
531 | } | |
532 | ||
533 | return sup; | |
534 | } | |
535 | ||
e158e02f SH |
536 | static int authenticate_sb_node(struct ubifs_info *c, |
537 | const struct ubifs_sb_node *sup) | |
538 | { | |
539 | unsigned int sup_flags = le32_to_cpu(sup->flags); | |
540 | u8 hmac_wkm[UBIFS_HMAC_ARR_SZ]; | |
541 | int authenticated = !!(sup_flags & UBIFS_FLG_AUTHENTICATION); | |
542 | int hash_algo; | |
543 | int err; | |
544 | ||
545 | if (c->authenticated && !authenticated) { | |
546 | ubifs_err(c, "authenticated FS forced, but found FS without authentication"); | |
547 | return -EINVAL; | |
548 | } | |
549 | ||
550 | if (!c->authenticated && authenticated) { | |
551 | ubifs_err(c, "authenticated FS found, but no key given"); | |
552 | return -EINVAL; | |
553 | } | |
554 | ||
555 | ubifs_msg(c, "Mounting in %sauthenticated mode", | |
556 | c->authenticated ? "" : "un"); | |
557 | ||
558 | if (!c->authenticated) | |
559 | return 0; | |
560 | ||
561 | if (!IS_ENABLED(CONFIG_UBIFS_FS_AUTHENTICATION)) | |
562 | return -EOPNOTSUPP; | |
563 | ||
564 | hash_algo = le16_to_cpu(sup->hash_algo); | |
565 | if (hash_algo >= HASH_ALGO__LAST) { | |
566 | ubifs_err(c, "superblock uses unknown hash algo %d", | |
567 | hash_algo); | |
568 | return -EINVAL; | |
569 | } | |
570 | ||
571 | if (strcmp(hash_algo_name[hash_algo], c->auth_hash_name)) { | |
572 | ubifs_err(c, "This filesystem uses %s for hashing," | |
573 | " but %s is specified", hash_algo_name[hash_algo], | |
574 | c->auth_hash_name); | |
575 | return -EINVAL; | |
576 | } | |
577 | ||
817aa094 SH |
578 | /* |
579 | * The super block node can either be authenticated by a HMAC or | |
580 | * by a signature in a ubifs_sig_node directly following the | |
581 | * super block node to support offline image creation. | |
582 | */ | |
583 | if (ubifs_hmac_zero(c, sup->hmac)) { | |
584 | err = ubifs_sb_verify_signature(c, sup); | |
585 | } else { | |
586 | err = ubifs_hmac_wkm(c, hmac_wkm); | |
587 | if (err) | |
588 | return err; | |
589 | if (ubifs_check_hmac(c, hmac_wkm, sup->hmac_wkm)) { | |
590 | ubifs_err(c, "provided key does not fit"); | |
591 | return -ENOKEY; | |
592 | } | |
593 | err = ubifs_node_verify_hmac(c, sup, sizeof(*sup), | |
594 | offsetof(struct ubifs_sb_node, | |
595 | hmac)); | |
e158e02f SH |
596 | } |
597 | ||
e158e02f SH |
598 | if (err) |
599 | ubifs_err(c, "Failed to authenticate superblock: %d", err); | |
600 | ||
601 | return err; | |
602 | } | |
603 | ||
1e51764a AB |
604 | /** |
605 | * ubifs_write_sb_node - write superblock node. | |
606 | * @c: UBIFS file-system description object | |
607 | * @sup: superblock node read with 'ubifs_read_sb_node()' | |
608 | * | |
609 | * This function returns %0 on success and a negative error code on failure. | |
610 | */ | |
611 | int ubifs_write_sb_node(struct ubifs_info *c, struct ubifs_sb_node *sup) | |
612 | { | |
613 | int len = ALIGN(UBIFS_SB_NODE_SZ, c->min_io_size); | |
e158e02f SH |
614 | int err; |
615 | ||
616 | err = ubifs_prepare_node_hmac(c, sup, UBIFS_SB_NODE_SZ, | |
617 | offsetof(struct ubifs_sb_node, hmac), 1); | |
618 | if (err) | |
619 | return err; | |
1e51764a | 620 | |
b36a261e | 621 | return ubifs_leb_change(c, UBIFS_SB_LNUM, sup, len); |
1e51764a AB |
622 | } |
623 | ||
624 | /** | |
625 | * ubifs_read_superblock - read superblock. | |
626 | * @c: UBIFS file-system description object | |
627 | * | |
628 | * This function finds, reads and checks the superblock. If an empty UBI volume | |
629 | * is being mounted, this function creates default superblock. Returns zero in | |
630 | * case of success, and a negative error code in case of failure. | |
631 | */ | |
632 | int ubifs_read_superblock(struct ubifs_info *c) | |
633 | { | |
634 | int err, sup_flags; | |
635 | struct ubifs_sb_node *sup; | |
636 | ||
637 | if (c->empty) { | |
638 | err = create_default_filesystem(c); | |
639 | if (err) | |
640 | return err; | |
641 | } | |
642 | ||
643 | sup = ubifs_read_sb_node(c); | |
644 | if (IS_ERR(sup)) | |
645 | return PTR_ERR(sup); | |
646 | ||
fd615005 SH |
647 | c->sup_node = sup; |
648 | ||
963f0cf6 AB |
649 | c->fmt_version = le32_to_cpu(sup->fmt_version); |
650 | c->ro_compat_version = le32_to_cpu(sup->ro_compat_version); | |
651 | ||
1e51764a AB |
652 | /* |
653 | * The software supports all previous versions but not future versions, | |
654 | * due to the unavailability of time-travelling equipment. | |
655 | */ | |
1e51764a | 656 | if (c->fmt_version > UBIFS_FORMAT_VERSION) { |
6eb61d58 | 657 | ubifs_assert(c, !c->ro_media || c->ro_mount); |
2ef13294 | 658 | if (!c->ro_mount || |
963f0cf6 | 659 | c->ro_compat_version > UBIFS_RO_COMPAT_VERSION) { |
235c362b | 660 | ubifs_err(c, "on-flash format version is w%d/r%d, but software only supports up to version w%d/r%d", |
79fda517 AB |
661 | c->fmt_version, c->ro_compat_version, |
662 | UBIFS_FORMAT_VERSION, | |
963f0cf6 AB |
663 | UBIFS_RO_COMPAT_VERSION); |
664 | if (c->ro_compat_version <= UBIFS_RO_COMPAT_VERSION) { | |
235c362b | 665 | ubifs_msg(c, "only R/O mounting is possible"); |
963f0cf6 AB |
666 | err = -EROFS; |
667 | } else | |
668 | err = -EINVAL; | |
669 | goto out; | |
670 | } | |
671 | ||
672 | /* | |
673 | * The FS is mounted R/O, and the media format is | |
674 | * R/O-compatible with the UBIFS implementation, so we can | |
675 | * mount. | |
676 | */ | |
677 | c->rw_incompat = 1; | |
1e51764a AB |
678 | } |
679 | ||
680 | if (c->fmt_version < 3) { | |
235c362b | 681 | ubifs_err(c, "on-flash format version %d is not supported", |
1e51764a AB |
682 | c->fmt_version); |
683 | err = -EINVAL; | |
684 | goto out; | |
685 | } | |
686 | ||
687 | switch (sup->key_hash) { | |
688 | case UBIFS_KEY_HASH_R5: | |
689 | c->key_hash = key_r5_hash; | |
690 | c->key_hash_type = UBIFS_KEY_HASH_R5; | |
691 | break; | |
692 | ||
693 | case UBIFS_KEY_HASH_TEST: | |
694 | c->key_hash = key_test_hash; | |
695 | c->key_hash_type = UBIFS_KEY_HASH_TEST; | |
696 | break; | |
84db119f | 697 | } |
1e51764a AB |
698 | |
699 | c->key_fmt = sup->key_fmt; | |
700 | ||
701 | switch (c->key_fmt) { | |
702 | case UBIFS_SIMPLE_KEY_FMT: | |
703 | c->key_len = UBIFS_SK_LEN; | |
704 | break; | |
705 | default: | |
235c362b | 706 | ubifs_err(c, "unsupported key format"); |
1e51764a AB |
707 | err = -EINVAL; |
708 | goto out; | |
709 | } | |
710 | ||
711 | c->leb_cnt = le32_to_cpu(sup->leb_cnt); | |
712 | c->max_leb_cnt = le32_to_cpu(sup->max_leb_cnt); | |
713 | c->max_bud_bytes = le64_to_cpu(sup->max_bud_bytes); | |
714 | c->log_lebs = le32_to_cpu(sup->log_lebs); | |
715 | c->lpt_lebs = le32_to_cpu(sup->lpt_lebs); | |
716 | c->orph_lebs = le32_to_cpu(sup->orph_lebs); | |
717 | c->jhead_cnt = le32_to_cpu(sup->jhead_cnt) + NONDATA_JHEADS_CNT; | |
718 | c->fanout = le32_to_cpu(sup->fanout); | |
719 | c->lsave_cnt = le32_to_cpu(sup->lsave_cnt); | |
1e51764a | 720 | c->rp_size = le64_to_cpu(sup->rp_size); |
39241beb EB |
721 | c->rp_uid = make_kuid(&init_user_ns, le32_to_cpu(sup->rp_uid)); |
722 | c->rp_gid = make_kgid(&init_user_ns, le32_to_cpu(sup->rp_gid)); | |
1e51764a | 723 | sup_flags = le32_to_cpu(sup->flags); |
553dea4d AB |
724 | if (!c->mount_opts.override_compr) |
725 | c->default_compr = le16_to_cpu(sup->default_compr); | |
1e51764a AB |
726 | |
727 | c->vfs_sb->s_time_gran = le32_to_cpu(sup->time_gran); | |
1e51764a | 728 | memcpy(&c->uuid, &sup->uuid, 16); |
1e51764a | 729 | c->big_lpt = !!(sup_flags & UBIFS_FLG_BIGLPT); |
9f58d350 | 730 | c->space_fixup = !!(sup_flags & UBIFS_FLG_SPACE_FIXUP); |
d63d61c1 | 731 | c->double_hash = !!(sup_flags & UBIFS_FLG_DOUBLE_HASH); |
e021986e RW |
732 | c->encrypted = !!(sup_flags & UBIFS_FLG_ENCRYPTION); |
733 | ||
e158e02f SH |
734 | err = authenticate_sb_node(c, sup); |
735 | if (err) | |
736 | goto out; | |
737 | ||
fc4b891b RW |
738 | if ((sup_flags & ~UBIFS_FLG_MASK) != 0) { |
739 | ubifs_err(c, "Unknown feature flags found: %#x", | |
740 | sup_flags & ~UBIFS_FLG_MASK); | |
741 | err = -EINVAL; | |
742 | goto out; | |
743 | } | |
744 | ||
76aa3494 | 745 | if (!IS_ENABLED(CONFIG_FS_ENCRYPTION) && c->encrypted) { |
e021986e RW |
746 | ubifs_err(c, "file system contains encrypted files but UBIFS" |
747 | " was built without crypto support."); | |
748 | err = -EINVAL; | |
749 | goto out; | |
750 | } | |
1e51764a AB |
751 | |
752 | /* Automatically increase file system size to the maximum size */ | |
1e51764a | 753 | if (c->leb_cnt < c->vi.size && c->leb_cnt < c->max_leb_cnt) { |
817aa094 SH |
754 | int old_leb_cnt = c->leb_cnt; |
755 | ||
1e51764a | 756 | c->leb_cnt = min_t(int, c->max_leb_cnt, c->vi.size); |
817aa094 SH |
757 | sup->leb_cnt = cpu_to_le32(c->leb_cnt); |
758 | ||
759 | c->superblock_need_write = 1; | |
760 | ||
761 | dbg_mnt("Auto resizing from %d LEBs to %d LEBs", | |
762 | old_leb_cnt, c->leb_cnt); | |
1e51764a AB |
763 | } |
764 | ||
765 | c->log_bytes = (long long)c->log_lebs * c->leb_size; | |
766 | c->log_last = UBIFS_LOG_LNUM + c->log_lebs - 1; | |
767 | c->lpt_first = UBIFS_LOG_LNUM + c->log_lebs; | |
768 | c->lpt_last = c->lpt_first + c->lpt_lebs - 1; | |
769 | c->orph_first = c->lpt_last + 1; | |
770 | c->orph_last = c->orph_first + c->orph_lebs - 1; | |
771 | c->main_lebs = c->leb_cnt - UBIFS_SB_LEBS - UBIFS_MST_LEBS; | |
772 | c->main_lebs -= c->log_lebs + c->lpt_lebs + c->orph_lebs; | |
773 | c->main_first = c->leb_cnt - c->main_lebs; | |
1e51764a AB |
774 | |
775 | err = validate_sb(c, sup); | |
776 | out: | |
1e51764a AB |
777 | return err; |
778 | } | |
6554a657 MC |
779 | |
780 | /** | |
781 | * fixup_leb - fixup/unmap an LEB containing free space. | |
782 | * @c: UBIFS file-system description object | |
783 | * @lnum: the LEB number to fix up | |
784 | * @len: number of used bytes in LEB (starting at offset 0) | |
785 | * | |
786 | * This function reads the contents of the given LEB number @lnum, then fixes | |
787 | * it up, so that empty min. I/O units in the end of LEB are actually erased on | |
788 | * flash (rather than being just all-0xff real data). If the LEB is completely | |
789 | * empty, it is simply unmapped. | |
790 | */ | |
791 | static int fixup_leb(struct ubifs_info *c, int lnum, int len) | |
792 | { | |
793 | int err; | |
794 | ||
6eb61d58 RW |
795 | ubifs_assert(c, len >= 0); |
796 | ubifs_assert(c, len % c->min_io_size == 0); | |
797 | ubifs_assert(c, len < c->leb_size); | |
6554a657 MC |
798 | |
799 | if (len == 0) { | |
800 | dbg_mnt("unmap empty LEB %d", lnum); | |
d3b2578f | 801 | return ubifs_leb_unmap(c, lnum); |
6554a657 MC |
802 | } |
803 | ||
804 | dbg_mnt("fixup LEB %d, data len %d", lnum, len); | |
d304820a | 805 | err = ubifs_leb_read(c, lnum, c->sbuf, 0, len, 1); |
6554a657 MC |
806 | if (err) |
807 | return err; | |
808 | ||
b36a261e | 809 | return ubifs_leb_change(c, lnum, c->sbuf, len); |
6554a657 MC |
810 | } |
811 | ||
812 | /** | |
813 | * fixup_free_space - find & remap all LEBs containing free space. | |
814 | * @c: UBIFS file-system description object | |
815 | * | |
816 | * This function walks through all LEBs in the filesystem and fiexes up those | |
817 | * containing free/empty space. | |
818 | */ | |
819 | static int fixup_free_space(struct ubifs_info *c) | |
820 | { | |
821 | int lnum, err = 0; | |
822 | struct ubifs_lprops *lprops; | |
823 | ||
824 | ubifs_get_lprops(c); | |
825 | ||
826 | /* Fixup LEBs in the master area */ | |
827 | for (lnum = UBIFS_MST_LNUM; lnum < UBIFS_LOG_LNUM; lnum++) { | |
828 | err = fixup_leb(c, lnum, c->mst_offs + c->mst_node_alsz); | |
829 | if (err) | |
830 | goto out; | |
831 | } | |
832 | ||
833 | /* Unmap unused log LEBs */ | |
834 | lnum = ubifs_next_log_lnum(c, c->lhead_lnum); | |
835 | while (lnum != c->ltail_lnum) { | |
836 | err = fixup_leb(c, lnum, 0); | |
837 | if (err) | |
838 | goto out; | |
839 | lnum = ubifs_next_log_lnum(c, lnum); | |
840 | } | |
841 | ||
c6727932 AB |
842 | /* |
843 | * Fixup the log head which contains the only a CS node at the | |
844 | * beginning. | |
845 | */ | |
846 | err = fixup_leb(c, c->lhead_lnum, | |
847 | ALIGN(UBIFS_CS_NODE_SZ, c->min_io_size)); | |
6554a657 MC |
848 | if (err) |
849 | goto out; | |
850 | ||
851 | /* Fixup LEBs in the LPT area */ | |
852 | for (lnum = c->lpt_first; lnum <= c->lpt_last; lnum++) { | |
853 | int free = c->ltab[lnum - c->lpt_first].free; | |
854 | ||
855 | if (free > 0) { | |
856 | err = fixup_leb(c, lnum, c->leb_size - free); | |
857 | if (err) | |
858 | goto out; | |
859 | } | |
860 | } | |
861 | ||
862 | /* Unmap LEBs in the orphans area */ | |
863 | for (lnum = c->orph_first; lnum <= c->orph_last; lnum++) { | |
864 | err = fixup_leb(c, lnum, 0); | |
865 | if (err) | |
866 | goto out; | |
867 | } | |
868 | ||
869 | /* Fixup LEBs in the main area */ | |
870 | for (lnum = c->main_first; lnum < c->leb_cnt; lnum++) { | |
871 | lprops = ubifs_lpt_lookup(c, lnum); | |
872 | if (IS_ERR(lprops)) { | |
873 | err = PTR_ERR(lprops); | |
874 | goto out; | |
875 | } | |
876 | ||
877 | if (lprops->free > 0) { | |
878 | err = fixup_leb(c, lnum, c->leb_size - lprops->free); | |
879 | if (err) | |
880 | goto out; | |
881 | } | |
882 | } | |
883 | ||
884 | out: | |
885 | ubifs_release_lprops(c); | |
886 | return err; | |
887 | } | |
888 | ||
889 | /** | |
890 | * ubifs_fixup_free_space - find & fix all LEBs with free space. | |
891 | * @c: UBIFS file-system description object | |
892 | * | |
893 | * This function fixes up LEBs containing free space on first mount, if the | |
894 | * appropriate flag was set when the FS was created. Each LEB with one or more | |
895 | * empty min. I/O unit (i.e. free-space-count > 0) is re-written, to make sure | |
896 | * the free space is actually erased. E.g., this is necessary for some NAND | |
897 | * chips, since the free space may have been programmed like real "0xff" data | |
898 | * (generating a non-0xff ECC), causing future writes to the not-really-erased | |
899 | * NAND pages to behave badly. After the space is fixed up, the superblock flag | |
900 | * is cleared, so that this is skipped for all future mounts. | |
901 | */ | |
902 | int ubifs_fixup_free_space(struct ubifs_info *c) | |
903 | { | |
904 | int err; | |
fd615005 | 905 | struct ubifs_sb_node *sup = c->sup_node; |
6554a657 | 906 | |
6eb61d58 RW |
907 | ubifs_assert(c, c->space_fixup); |
908 | ubifs_assert(c, !c->ro_mount); | |
6554a657 | 909 | |
235c362b | 910 | ubifs_msg(c, "start fixing up free space"); |
6554a657 MC |
911 | |
912 | err = fixup_free_space(c); | |
913 | if (err) | |
914 | return err; | |
915 | ||
6554a657 MC |
916 | /* Free-space fixup is no longer required */ |
917 | c->space_fixup = 0; | |
918 | sup->flags &= cpu_to_le32(~UBIFS_FLG_SPACE_FIXUP); | |
919 | ||
817aa094 | 920 | c->superblock_need_write = 1; |
6554a657 | 921 | |
235c362b | 922 | ubifs_msg(c, "free space fixup complete"); |
6554a657 MC |
923 | return err; |
924 | } | |
e021986e RW |
925 | |
926 | int ubifs_enable_encryption(struct ubifs_info *c) | |
927 | { | |
928 | int err; | |
fd615005 | 929 | struct ubifs_sb_node *sup = c->sup_node; |
e021986e | 930 | |
76aa3494 | 931 | if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) |
eea2c05d SH |
932 | return -EOPNOTSUPP; |
933 | ||
e021986e RW |
934 | if (c->encrypted) |
935 | return 0; | |
936 | ||
937 | if (c->ro_mount || c->ro_media) | |
938 | return -EROFS; | |
939 | ||
940 | if (c->fmt_version < 5) { | |
941 | ubifs_err(c, "on-flash format version 5 is needed for encryption"); | |
942 | return -EINVAL; | |
943 | } | |
944 | ||
e021986e RW |
945 | sup->flags |= cpu_to_le32(UBIFS_FLG_ENCRYPTION); |
946 | ||
947 | err = ubifs_write_sb_node(c, sup); | |
948 | if (!err) | |
949 | c->encrypted = 1; | |
e021986e RW |
950 | |
951 | return err; | |
952 | } |