Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * JFFS2 -- Journalling Flash File System, Version 2. | |
3 | * | |
c00c310e | 4 | * Copyright © 2001-2007 Red Hat, Inc. |
1da177e4 LT |
5 | * |
6 | * Created by David Woodhouse <dwmw2@infradead.org> | |
7 | * | |
8 | * For licensing information, see the file 'LICENCE' in this directory. | |
9 | * | |
1da177e4 LT |
10 | */ |
11 | ||
12 | #include <linux/kernel.h> | |
13 | #include <linux/fs.h> | |
14 | #include <linux/crc32.h> | |
1da177e4 LT |
15 | #include <linux/pagemap.h> |
16 | #include <linux/mtd/mtd.h> | |
17 | #include "nodelist.h" | |
18 | #include "compr.h" | |
19 | ||
20 | ||
27c72b04 DW |
21 | int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, |
22 | uint32_t mode, struct jffs2_raw_inode *ri) | |
1da177e4 LT |
23 | { |
24 | struct jffs2_inode_cache *ic; | |
25 | ||
26 | ic = jffs2_alloc_inode_cache(); | |
27 | if (!ic) { | |
28 | return -ENOMEM; | |
29 | } | |
30 | ||
31 | memset(ic, 0, sizeof(*ic)); | |
32 | ||
33 | f->inocache = ic; | |
27c72b04 | 34 | f->inocache->pino_nlink = 1; /* Will be overwritten shortly for directories */ |
1da177e4 | 35 | f->inocache->nodes = (struct jffs2_raw_node_ref *)f->inocache; |
1da177e4 | 36 | f->inocache->state = INO_STATE_PRESENT; |
1da177e4 | 37 | |
1da177e4 | 38 | jffs2_add_ino_cache(c, f->inocache); |
9c261b33 | 39 | jffs2_dbg(1, "%s(): Assigned ino# %d\n", __func__, f->inocache->ino); |
7d200960 | 40 | ri->ino = cpu_to_je32(f->inocache->ino); |
1da177e4 LT |
41 | |
42 | ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
43 | ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); | |
44 | ri->totlen = cpu_to_je32(PAD(sizeof(*ri))); | |
45 | ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); | |
46 | ri->mode = cpu_to_jemode(mode); | |
47 | ||
48 | f->highest_version = 1; | |
49 | ri->version = cpu_to_je32(f->highest_version); | |
50 | ||
51 | return 0; | |
52 | } | |
53 | ||
182ec4ee | 54 | /* jffs2_write_dnode - given a raw_inode, allocate a full_dnode for it, |
1da177e4 LT |
55 | write it to the flash, link it into the existing inode/fragment list */ |
56 | ||
9fe4854c DW |
57 | struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, |
58 | struct jffs2_raw_inode *ri, const unsigned char *data, | |
59 | uint32_t datalen, int alloc_mode) | |
1da177e4 LT |
60 | |
61 | { | |
1da177e4 LT |
62 | struct jffs2_full_dnode *fn; |
63 | size_t retlen; | |
9fe4854c | 64 | uint32_t flash_ofs; |
1da177e4 LT |
65 | struct kvec vecs[2]; |
66 | int ret; | |
67 | int retried = 0; | |
68 | unsigned long cnt = 2; | |
69 | ||
70 | D1(if(je32_to_cpu(ri->hdr_crc) != crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)) { | |
da320f05 | 71 | pr_crit("Eep. CRC not correct in jffs2_write_dnode()\n"); |
1da177e4 LT |
72 | BUG(); |
73 | } | |
74 | ); | |
75 | vecs[0].iov_base = ri; | |
76 | vecs[0].iov_len = sizeof(*ri); | |
77 | vecs[1].iov_base = (unsigned char *)data; | |
78 | vecs[1].iov_len = datalen; | |
79 | ||
1da177e4 | 80 | if (je32_to_cpu(ri->totlen) != sizeof(*ri) + datalen) { |
da320f05 JP |
81 | pr_warn("%s(): ri->totlen (0x%08x) != sizeof(*ri) (0x%08zx) + datalen (0x%08x)\n", |
82 | __func__, je32_to_cpu(ri->totlen), | |
83 | sizeof(*ri), datalen); | |
1da177e4 | 84 | } |
182ec4ee | 85 | |
1da177e4 | 86 | fn = jffs2_alloc_full_dnode(); |
2f785402 | 87 | if (!fn) |
1da177e4 | 88 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
89 | |
90 | /* check number of valid vecs */ | |
91 | if (!datalen || !data) | |
92 | cnt = 1; | |
93 | retry: | |
2f785402 | 94 | flash_ofs = write_ofs(c); |
9fe4854c DW |
95 | |
96 | jffs2_dbg_prewrite_paranoia_check(c, flash_ofs, vecs[0].iov_len + vecs[1].iov_len); | |
1da177e4 | 97 | |
9b88f473 EH |
98 | if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(ri->version) < f->highest_version)) { |
99 | BUG_ON(!retried); | |
9c261b33 JP |
100 | jffs2_dbg(1, "%s(): dnode_version %d, highest version %d -> updating dnode\n", |
101 | __func__, | |
102 | je32_to_cpu(ri->version), f->highest_version); | |
9b88f473 EH |
103 | ri->version = cpu_to_je32(++f->highest_version); |
104 | ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); | |
e4803c30 EH |
105 | } |
106 | ||
1da177e4 LT |
107 | ret = jffs2_flash_writev(c, vecs, cnt, flash_ofs, &retlen, |
108 | (alloc_mode==ALLOC_GC)?0:f->inocache->ino); | |
109 | ||
110 | if (ret || (retlen != sizeof(*ri) + datalen)) { | |
da320f05 JP |
111 | pr_notice("Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", |
112 | sizeof(*ri) + datalen, flash_ofs, ret, retlen); | |
1da177e4 LT |
113 | |
114 | /* Mark the space as dirtied */ | |
115 | if (retlen) { | |
182ec4ee | 116 | /* Don't change raw->size to match retlen. We may have |
1da177e4 LT |
117 | written the node header already, and only the data will |
118 | seem corrupted, in which case the scan would skip over | |
182ec4ee | 119 | any node we write before the original intended end of |
1da177e4 | 120 | this node */ |
2f785402 | 121 | jffs2_add_physical_node_ref(c, flash_ofs | REF_OBSOLETE, PAD(sizeof(*ri)+datalen), NULL); |
1da177e4 | 122 | } else { |
da320f05 JP |
123 | pr_notice("Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", |
124 | flash_ofs); | |
1da177e4 | 125 | } |
2f785402 | 126 | if (!retried && alloc_mode != ALLOC_NORETRY) { |
1da177e4 LT |
127 | /* Try to reallocate space and retry */ |
128 | uint32_t dummy; | |
129 | struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; | |
130 | ||
131 | retried = 1; | |
132 | ||
9c261b33 | 133 | jffs2_dbg(1, "Retrying failed write.\n"); |
182ec4ee | 134 | |
730554d9 AB |
135 | jffs2_dbg_acct_sanity_check(c,jeb); |
136 | jffs2_dbg_acct_paranoia_check(c, jeb); | |
1da177e4 LT |
137 | |
138 | if (alloc_mode == ALLOC_GC) { | |
9fe4854c DW |
139 | ret = jffs2_reserve_space_gc(c, sizeof(*ri) + datalen, &dummy, |
140 | JFFS2_SUMMARY_INODE_SIZE); | |
1da177e4 LT |
141 | } else { |
142 | /* Locking pain */ | |
ced22070 | 143 | mutex_unlock(&f->sem); |
1da177e4 | 144 | jffs2_complete_reservation(c); |
182ec4ee | 145 | |
9fe4854c DW |
146 | ret = jffs2_reserve_space(c, sizeof(*ri) + datalen, &dummy, |
147 | alloc_mode, JFFS2_SUMMARY_INODE_SIZE); | |
ced22070 | 148 | mutex_lock(&f->sem); |
1da177e4 LT |
149 | } |
150 | ||
151 | if (!ret) { | |
9fe4854c | 152 | flash_ofs = write_ofs(c); |
9c261b33 JP |
153 | jffs2_dbg(1, "Allocated space at 0x%08x to retry failed write.\n", |
154 | flash_ofs); | |
1da177e4 | 155 | |
730554d9 AB |
156 | jffs2_dbg_acct_sanity_check(c,jeb); |
157 | jffs2_dbg_acct_paranoia_check(c, jeb); | |
1da177e4 LT |
158 | |
159 | goto retry; | |
160 | } | |
9c261b33 JP |
161 | jffs2_dbg(1, "Failed to allocate space to retry failed write: %d!\n", |
162 | ret); | |
1da177e4 LT |
163 | } |
164 | /* Release the full_dnode which is now useless, and return */ | |
165 | jffs2_free_full_dnode(fn); | |
166 | return ERR_PTR(ret?ret:-EIO); | |
167 | } | |
168 | /* Mark the space used */ | |
182ec4ee TG |
169 | /* If node covers at least a whole page, or if it starts at the |
170 | beginning of a page and runs to the end of the file, or if | |
171 | it's a hole node, mark it REF_PRISTINE, else REF_NORMAL. | |
1da177e4 LT |
172 | */ |
173 | if ((je32_to_cpu(ri->dsize) >= PAGE_CACHE_SIZE) || | |
174 | ( ((je32_to_cpu(ri->offset)&(PAGE_CACHE_SIZE-1))==0) && | |
175 | (je32_to_cpu(ri->dsize)+je32_to_cpu(ri->offset) == je32_to_cpu(ri->isize)))) { | |
2f785402 | 176 | flash_ofs |= REF_PRISTINE; |
1da177e4 | 177 | } else { |
2f785402 | 178 | flash_ofs |= REF_NORMAL; |
1da177e4 | 179 | } |
2f785402 | 180 | fn->raw = jffs2_add_physical_node_ref(c, flash_ofs, PAD(sizeof(*ri)+datalen), f->inocache); |
5bd5c03c JT |
181 | if (IS_ERR(fn->raw)) { |
182 | void *hold_err = fn->raw; | |
183 | /* Release the full_dnode which is now useless, and return */ | |
184 | jffs2_free_full_dnode(fn); | |
e231c2ee | 185 | return ERR_CAST(hold_err); |
5bd5c03c | 186 | } |
2f785402 DW |
187 | fn->ofs = je32_to_cpu(ri->offset); |
188 | fn->size = je32_to_cpu(ri->dsize); | |
189 | fn->frags = 0; | |
1da177e4 | 190 | |
9c261b33 | 191 | jffs2_dbg(1, "jffs2_write_dnode wrote node at 0x%08x(%d) with dsize 0x%x, csize 0x%x, node_crc 0x%08x, data_crc 0x%08x, totlen 0x%08x\n", |
2f785402 | 192 | flash_ofs & ~3, flash_ofs & 3, je32_to_cpu(ri->dsize), |
1da177e4 | 193 | je32_to_cpu(ri->csize), je32_to_cpu(ri->node_crc), |
9c261b33 | 194 | je32_to_cpu(ri->data_crc), je32_to_cpu(ri->totlen)); |
1da177e4 LT |
195 | |
196 | if (retried) { | |
730554d9 | 197 | jffs2_dbg_acct_sanity_check(c,NULL); |
1da177e4 LT |
198 | } |
199 | ||
200 | return fn; | |
201 | } | |
202 | ||
9fe4854c DW |
203 | struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jffs2_inode_info *f, |
204 | struct jffs2_raw_dirent *rd, const unsigned char *name, | |
205 | uint32_t namelen, int alloc_mode) | |
1da177e4 | 206 | { |
1da177e4 LT |
207 | struct jffs2_full_dirent *fd; |
208 | size_t retlen; | |
209 | struct kvec vecs[2]; | |
2f785402 | 210 | uint32_t flash_ofs; |
1da177e4 LT |
211 | int retried = 0; |
212 | int ret; | |
213 | ||
9c261b33 JP |
214 | jffs2_dbg(1, "%s(ino #%u, name at *0x%p \"%s\"->ino #%u, name_crc 0x%08x)\n", |
215 | __func__, | |
1da177e4 | 216 | je32_to_cpu(rd->pino), name, name, je32_to_cpu(rd->ino), |
9c261b33 | 217 | je32_to_cpu(rd->name_crc)); |
730554d9 | 218 | |
1da177e4 | 219 | D1(if(je32_to_cpu(rd->hdr_crc) != crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)) { |
da320f05 | 220 | pr_crit("Eep. CRC not correct in jffs2_write_dirent()\n"); |
1da177e4 | 221 | BUG(); |
2f785402 | 222 | }); |
1da177e4 | 223 | |
69ca4378 DW |
224 | if (strnlen(name, namelen) != namelen) { |
225 | /* This should never happen, but seems to have done on at least one | |
226 | occasion: https://dev.laptop.org/ticket/4184 */ | |
da320f05 JP |
227 | pr_crit("Error in jffs2_write_dirent() -- name contains zero bytes!\n"); |
228 | pr_crit("Directory inode #%u, name at *0x%p \"%s\"->ino #%u, name_crc 0x%08x\n", | |
229 | je32_to_cpu(rd->pino), name, name, je32_to_cpu(rd->ino), | |
230 | je32_to_cpu(rd->name_crc)); | |
69ca4378 DW |
231 | WARN_ON(1); |
232 | return ERR_PTR(-EIO); | |
233 | } | |
234 | ||
1da177e4 LT |
235 | vecs[0].iov_base = rd; |
236 | vecs[0].iov_len = sizeof(*rd); | |
237 | vecs[1].iov_base = (unsigned char *)name; | |
238 | vecs[1].iov_len = namelen; | |
182ec4ee | 239 | |
1da177e4 | 240 | fd = jffs2_alloc_full_dirent(namelen+1); |
2f785402 | 241 | if (!fd) |
1da177e4 | 242 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
243 | |
244 | fd->version = je32_to_cpu(rd->version); | |
245 | fd->ino = je32_to_cpu(rd->ino); | |
69ca4378 | 246 | fd->nhash = full_name_hash(name, namelen); |
1da177e4 LT |
247 | fd->type = rd->type; |
248 | memcpy(fd->name, name, namelen); | |
249 | fd->name[namelen]=0; | |
250 | ||
251 | retry: | |
2f785402 | 252 | flash_ofs = write_ofs(c); |
1da177e4 | 253 | |
2f785402 | 254 | jffs2_dbg_prewrite_paranoia_check(c, flash_ofs, vecs[0].iov_len + vecs[1].iov_len); |
1da177e4 | 255 | |
9b88f473 EH |
256 | if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(rd->version) < f->highest_version)) { |
257 | BUG_ON(!retried); | |
9c261b33 JP |
258 | jffs2_dbg(1, "%s(): dirent_version %d, highest version %d -> updating dirent\n", |
259 | __func__, | |
260 | je32_to_cpu(rd->version), f->highest_version); | |
9b88f473 EH |
261 | rd->version = cpu_to_je32(++f->highest_version); |
262 | fd->version = je32_to_cpu(rd->version); | |
263 | rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); | |
e4803c30 EH |
264 | } |
265 | ||
1da177e4 LT |
266 | ret = jffs2_flash_writev(c, vecs, 2, flash_ofs, &retlen, |
267 | (alloc_mode==ALLOC_GC)?0:je32_to_cpu(rd->pino)); | |
268 | if (ret || (retlen != sizeof(*rd) + namelen)) { | |
da320f05 JP |
269 | pr_notice("Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", |
270 | sizeof(*rd) + namelen, flash_ofs, ret, retlen); | |
1da177e4 LT |
271 | /* Mark the space as dirtied */ |
272 | if (retlen) { | |
2f785402 | 273 | jffs2_add_physical_node_ref(c, flash_ofs | REF_OBSOLETE, PAD(sizeof(*rd)+namelen), NULL); |
1da177e4 | 274 | } else { |
da320f05 JP |
275 | pr_notice("Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", |
276 | flash_ofs); | |
1da177e4 | 277 | } |
2f785402 | 278 | if (!retried) { |
1da177e4 LT |
279 | /* Try to reallocate space and retry */ |
280 | uint32_t dummy; | |
281 | struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; | |
282 | ||
283 | retried = 1; | |
284 | ||
9c261b33 | 285 | jffs2_dbg(1, "Retrying failed write.\n"); |
1da177e4 | 286 | |
730554d9 AB |
287 | jffs2_dbg_acct_sanity_check(c,jeb); |
288 | jffs2_dbg_acct_paranoia_check(c, jeb); | |
1da177e4 LT |
289 | |
290 | if (alloc_mode == ALLOC_GC) { | |
9fe4854c DW |
291 | ret = jffs2_reserve_space_gc(c, sizeof(*rd) + namelen, &dummy, |
292 | JFFS2_SUMMARY_DIRENT_SIZE(namelen)); | |
1da177e4 LT |
293 | } else { |
294 | /* Locking pain */ | |
ced22070 | 295 | mutex_unlock(&f->sem); |
1da177e4 | 296 | jffs2_complete_reservation(c); |
182ec4ee | 297 | |
9fe4854c DW |
298 | ret = jffs2_reserve_space(c, sizeof(*rd) + namelen, &dummy, |
299 | alloc_mode, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); | |
ced22070 | 300 | mutex_lock(&f->sem); |
1da177e4 LT |
301 | } |
302 | ||
303 | if (!ret) { | |
9fe4854c | 304 | flash_ofs = write_ofs(c); |
9c261b33 JP |
305 | jffs2_dbg(1, "Allocated space at 0x%08x to retry failed write\n", |
306 | flash_ofs); | |
730554d9 AB |
307 | jffs2_dbg_acct_sanity_check(c,jeb); |
308 | jffs2_dbg_acct_paranoia_check(c, jeb); | |
1da177e4 LT |
309 | goto retry; |
310 | } | |
9c261b33 JP |
311 | jffs2_dbg(1, "Failed to allocate space to retry failed write: %d!\n", |
312 | ret); | |
1da177e4 LT |
313 | } |
314 | /* Release the full_dnode which is now useless, and return */ | |
315 | jffs2_free_full_dirent(fd); | |
316 | return ERR_PTR(ret?ret:-EIO); | |
317 | } | |
318 | /* Mark the space used */ | |
71c23397 DW |
319 | fd->raw = jffs2_add_physical_node_ref(c, flash_ofs | dirent_node_state(rd), |
320 | PAD(sizeof(*rd)+namelen), f->inocache); | |
5bd5c03c JT |
321 | if (IS_ERR(fd->raw)) { |
322 | void *hold_err = fd->raw; | |
323 | /* Release the full_dirent which is now useless, and return */ | |
324 | jffs2_free_full_dirent(fd); | |
e231c2ee | 325 | return ERR_CAST(hold_err); |
5bd5c03c | 326 | } |
1da177e4 LT |
327 | |
328 | if (retried) { | |
730554d9 | 329 | jffs2_dbg_acct_sanity_check(c,NULL); |
1da177e4 LT |
330 | } |
331 | ||
332 | return fd; | |
333 | } | |
334 | ||
335 | /* The OS-specific code fills in the metadata in the jffs2_raw_inode for us, so that | |
336 | we don't have to go digging in struct inode or its equivalent. It should set: | |
337 | mode, uid, gid, (starting)isize, atime, ctime, mtime */ | |
338 | int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, | |
182ec4ee | 339 | struct jffs2_raw_inode *ri, unsigned char *buf, |
1da177e4 LT |
340 | uint32_t offset, uint32_t writelen, uint32_t *retlen) |
341 | { | |
342 | int ret = 0; | |
343 | uint32_t writtenlen = 0; | |
344 | ||
9c261b33 JP |
345 | jffs2_dbg(1, "%s(): Ino #%u, ofs 0x%x, len 0x%x\n", |
346 | __func__, f->inocache->ino, offset, writelen); | |
182ec4ee | 347 | |
1da177e4 LT |
348 | while(writelen) { |
349 | struct jffs2_full_dnode *fn; | |
350 | unsigned char *comprbuf = NULL; | |
351 | uint16_t comprtype = JFFS2_COMPR_NONE; | |
9fe4854c | 352 | uint32_t alloclen; |
1da177e4 LT |
353 | uint32_t datalen, cdatalen; |
354 | int retried = 0; | |
355 | ||
356 | retry: | |
9c261b33 JP |
357 | jffs2_dbg(2, "jffs2_commit_write() loop: 0x%x to write to 0x%x\n", |
358 | writelen, offset); | |
1da177e4 | 359 | |
9fe4854c | 360 | ret = jffs2_reserve_space(c, sizeof(*ri) + JFFS2_MIN_DATA_LEN, |
e631ddba | 361 | &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); |
1da177e4 | 362 | if (ret) { |
9c261b33 | 363 | jffs2_dbg(1, "jffs2_reserve_space returned %d\n", ret); |
1da177e4 LT |
364 | break; |
365 | } | |
ced22070 | 366 | mutex_lock(&f->sem); |
1da177e4 LT |
367 | datalen = min_t(uint32_t, writelen, PAGE_CACHE_SIZE - (offset & (PAGE_CACHE_SIZE-1))); |
368 | cdatalen = min_t(uint32_t, alloclen - sizeof(*ri), datalen); | |
369 | ||
370 | comprtype = jffs2_compress(c, f, buf, &comprbuf, &datalen, &cdatalen); | |
371 | ||
372 | ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
373 | ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); | |
374 | ri->totlen = cpu_to_je32(sizeof(*ri) + cdatalen); | |
375 | ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); | |
376 | ||
377 | ri->ino = cpu_to_je32(f->inocache->ino); | |
378 | ri->version = cpu_to_je32(++f->highest_version); | |
379 | ri->isize = cpu_to_je32(max(je32_to_cpu(ri->isize), offset + datalen)); | |
380 | ri->offset = cpu_to_je32(offset); | |
381 | ri->csize = cpu_to_je32(cdatalen); | |
382 | ri->dsize = cpu_to_je32(datalen); | |
383 | ri->compr = comprtype & 0xff; | |
384 | ri->usercompr = (comprtype >> 8 ) & 0xff; | |
385 | ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); | |
386 | ri->data_crc = cpu_to_je32(crc32(0, comprbuf, cdatalen)); | |
387 | ||
9fe4854c | 388 | fn = jffs2_write_dnode(c, f, ri, comprbuf, cdatalen, ALLOC_NORETRY); |
1da177e4 LT |
389 | |
390 | jffs2_free_comprbuf(comprbuf, buf); | |
391 | ||
392 | if (IS_ERR(fn)) { | |
393 | ret = PTR_ERR(fn); | |
ced22070 | 394 | mutex_unlock(&f->sem); |
1da177e4 LT |
395 | jffs2_complete_reservation(c); |
396 | if (!retried) { | |
397 | /* Write error to be retried */ | |
398 | retried = 1; | |
9c261b33 | 399 | jffs2_dbg(1, "Retrying node write in jffs2_write_inode_range()\n"); |
1da177e4 LT |
400 | goto retry; |
401 | } | |
402 | break; | |
403 | } | |
404 | ret = jffs2_add_full_dnode_to_inode(c, f, fn); | |
405 | if (f->metadata) { | |
406 | jffs2_mark_node_obsolete(c, f->metadata->raw); | |
407 | jffs2_free_full_dnode(f->metadata); | |
408 | f->metadata = NULL; | |
409 | } | |
410 | if (ret) { | |
411 | /* Eep */ | |
9c261b33 JP |
412 | jffs2_dbg(1, "Eep. add_full_dnode_to_inode() failed in commit_write, returned %d\n", |
413 | ret); | |
1da177e4 LT |
414 | jffs2_mark_node_obsolete(c, fn->raw); |
415 | jffs2_free_full_dnode(fn); | |
416 | ||
ced22070 | 417 | mutex_unlock(&f->sem); |
1da177e4 LT |
418 | jffs2_complete_reservation(c); |
419 | break; | |
420 | } | |
ced22070 | 421 | mutex_unlock(&f->sem); |
1da177e4 LT |
422 | jffs2_complete_reservation(c); |
423 | if (!datalen) { | |
da320f05 | 424 | pr_warn("Eep. We didn't actually write any data in jffs2_write_inode_range()\n"); |
1da177e4 LT |
425 | ret = -EIO; |
426 | break; | |
427 | } | |
9c261b33 | 428 | jffs2_dbg(1, "increasing writtenlen by %d\n", datalen); |
1da177e4 LT |
429 | writtenlen += datalen; |
430 | offset += datalen; | |
431 | writelen -= datalen; | |
432 | buf += datalen; | |
433 | } | |
434 | *retlen = writtenlen; | |
435 | return ret; | |
436 | } | |
437 | ||
2a7dba39 EP |
438 | int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, |
439 | struct jffs2_inode_info *f, struct jffs2_raw_inode *ri, | |
440 | const struct qstr *qstr) | |
1da177e4 LT |
441 | { |
442 | struct jffs2_raw_dirent *rd; | |
443 | struct jffs2_full_dnode *fn; | |
444 | struct jffs2_full_dirent *fd; | |
9fe4854c | 445 | uint32_t alloclen; |
1da177e4 LT |
446 | int ret; |
447 | ||
182ec4ee TG |
448 | /* Try to reserve enough space for both node and dirent. |
449 | * Just the node will do for now, though | |
1da177e4 | 450 | */ |
9fe4854c | 451 | ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL, |
e631ddba | 452 | JFFS2_SUMMARY_INODE_SIZE); |
9c261b33 | 453 | jffs2_dbg(1, "%s(): reserved 0x%x bytes\n", __func__, alloclen); |
590fe34c | 454 | if (ret) |
1da177e4 | 455 | return ret; |
590fe34c DW |
456 | |
457 | mutex_lock(&f->sem); | |
1da177e4 LT |
458 | |
459 | ri->data_crc = cpu_to_je32(0); | |
460 | ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); | |
461 | ||
9fe4854c | 462 | fn = jffs2_write_dnode(c, f, ri, NULL, 0, ALLOC_NORMAL); |
1da177e4 | 463 | |
9c261b33 JP |
464 | jffs2_dbg(1, "jffs2_do_create created file with mode 0x%x\n", |
465 | jemode_to_cpu(ri->mode)); | |
1da177e4 LT |
466 | |
467 | if (IS_ERR(fn)) { | |
9c261b33 | 468 | jffs2_dbg(1, "jffs2_write_dnode() failed\n"); |
1da177e4 | 469 | /* Eeek. Wave bye bye */ |
ced22070 | 470 | mutex_unlock(&f->sem); |
1da177e4 LT |
471 | jffs2_complete_reservation(c); |
472 | return PTR_ERR(fn); | |
473 | } | |
182ec4ee | 474 | /* No data here. Only a metadata node, which will be |
1da177e4 LT |
475 | obsoleted by the first data write |
476 | */ | |
477 | f->metadata = fn; | |
478 | ||
ced22070 | 479 | mutex_unlock(&f->sem); |
1da177e4 | 480 | jffs2_complete_reservation(c); |
cfc8dc6f | 481 | |
2a7dba39 | 482 | ret = jffs2_init_security(&f->vfs_inode, &dir_f->vfs_inode, qstr); |
cfc8dc6f KK |
483 | if (ret) |
484 | return ret; | |
485 | ret = jffs2_init_acl_post(&f->vfs_inode); | |
486 | if (ret) | |
487 | return ret; | |
488 | ||
2a7dba39 EP |
489 | ret = jffs2_reserve_space(c, sizeof(*rd)+qstr->len, &alloclen, |
490 | ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(qstr->len)); | |
182ec4ee | 491 | |
1da177e4 LT |
492 | if (ret) { |
493 | /* Eep. */ | |
9c261b33 | 494 | jffs2_dbg(1, "jffs2_reserve_space() for dirent failed\n"); |
1da177e4 LT |
495 | return ret; |
496 | } | |
497 | ||
498 | rd = jffs2_alloc_raw_dirent(); | |
499 | if (!rd) { | |
500 | /* Argh. Now we treat it like a normal delete */ | |
501 | jffs2_complete_reservation(c); | |
502 | return -ENOMEM; | |
503 | } | |
504 | ||
ced22070 | 505 | mutex_lock(&dir_f->sem); |
1da177e4 LT |
506 | |
507 | rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
508 | rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); | |
2a7dba39 | 509 | rd->totlen = cpu_to_je32(sizeof(*rd) + qstr->len); |
1da177e4 LT |
510 | rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); |
511 | ||
512 | rd->pino = cpu_to_je32(dir_f->inocache->ino); | |
513 | rd->version = cpu_to_je32(++dir_f->highest_version); | |
514 | rd->ino = ri->ino; | |
515 | rd->mctime = ri->ctime; | |
2a7dba39 | 516 | rd->nsize = qstr->len; |
1da177e4 LT |
517 | rd->type = DT_REG; |
518 | rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); | |
2a7dba39 | 519 | rd->name_crc = cpu_to_je32(crc32(0, qstr->name, qstr->len)); |
1da177e4 | 520 | |
2a7dba39 | 521 | fd = jffs2_write_dirent(c, dir_f, rd, qstr->name, qstr->len, ALLOC_NORMAL); |
1da177e4 LT |
522 | |
523 | jffs2_free_raw_dirent(rd); | |
182ec4ee | 524 | |
1da177e4 | 525 | if (IS_ERR(fd)) { |
182ec4ee | 526 | /* dirent failed to write. Delete the inode normally |
1da177e4 LT |
527 | as if it were the final unlink() */ |
528 | jffs2_complete_reservation(c); | |
ced22070 | 529 | mutex_unlock(&dir_f->sem); |
1da177e4 LT |
530 | return PTR_ERR(fd); |
531 | } | |
532 | ||
533 | /* Link the fd into the inode's list, obsoleting an old | |
534 | one if necessary. */ | |
535 | jffs2_add_fd_to_list(c, fd, &dir_f->dents); | |
536 | ||
537 | jffs2_complete_reservation(c); | |
ced22070 | 538 | mutex_unlock(&dir_f->sem); |
1da177e4 LT |
539 | |
540 | return 0; | |
541 | } | |
542 | ||
543 | ||
544 | int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, | |
3a69e0cd AB |
545 | const char *name, int namelen, struct jffs2_inode_info *dead_f, |
546 | uint32_t time) | |
1da177e4 LT |
547 | { |
548 | struct jffs2_raw_dirent *rd; | |
549 | struct jffs2_full_dirent *fd; | |
9fe4854c | 550 | uint32_t alloclen; |
1da177e4 LT |
551 | int ret; |
552 | ||
a491486a | 553 | if (!jffs2_can_mark_obsolete(c)) { |
1da177e4 LT |
554 | /* We can't mark stuff obsolete on the medium. We need to write a deletion dirent */ |
555 | ||
556 | rd = jffs2_alloc_raw_dirent(); | |
557 | if (!rd) | |
558 | return -ENOMEM; | |
559 | ||
9fe4854c | 560 | ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, |
e631ddba | 561 | ALLOC_DELETION, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); |
1da177e4 LT |
562 | if (ret) { |
563 | jffs2_free_raw_dirent(rd); | |
564 | return ret; | |
565 | } | |
566 | ||
ced22070 | 567 | mutex_lock(&dir_f->sem); |
1da177e4 LT |
568 | |
569 | /* Build a deletion node */ | |
570 | rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
571 | rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); | |
572 | rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); | |
573 | rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); | |
182ec4ee | 574 | |
1da177e4 LT |
575 | rd->pino = cpu_to_je32(dir_f->inocache->ino); |
576 | rd->version = cpu_to_je32(++dir_f->highest_version); | |
577 | rd->ino = cpu_to_je32(0); | |
3a69e0cd | 578 | rd->mctime = cpu_to_je32(time); |
1da177e4 LT |
579 | rd->nsize = namelen; |
580 | rd->type = DT_UNKNOWN; | |
581 | rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); | |
582 | rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); | |
583 | ||
9fe4854c | 584 | fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, ALLOC_DELETION); |
182ec4ee | 585 | |
1da177e4 LT |
586 | jffs2_free_raw_dirent(rd); |
587 | ||
588 | if (IS_ERR(fd)) { | |
589 | jffs2_complete_reservation(c); | |
ced22070 | 590 | mutex_unlock(&dir_f->sem); |
1da177e4 LT |
591 | return PTR_ERR(fd); |
592 | } | |
593 | ||
594 | /* File it. This will mark the old one obsolete. */ | |
595 | jffs2_add_fd_to_list(c, fd, &dir_f->dents); | |
ced22070 | 596 | mutex_unlock(&dir_f->sem); |
1da177e4 | 597 | } else { |
1da177e4 LT |
598 | uint32_t nhash = full_name_hash(name, namelen); |
599 | ||
bf66737c | 600 | fd = dir_f->dents; |
b5748643 DW |
601 | /* We don't actually want to reserve any space, but we do |
602 | want to be holding the alloc_sem when we write to flash */ | |
ced22070 DW |
603 | mutex_lock(&c->alloc_sem); |
604 | mutex_lock(&dir_f->sem); | |
1da177e4 | 605 | |
15953580 DW |
606 | for (fd = dir_f->dents; fd; fd = fd->next) { |
607 | if (fd->nhash == nhash && | |
608 | !memcmp(fd->name, name, namelen) && | |
609 | !fd->name[namelen]) { | |
1da177e4 | 610 | |
9c261b33 JP |
611 | jffs2_dbg(1, "Marking old dirent node (ino #%u) @%08x obsolete\n", |
612 | fd->ino, ref_offset(fd->raw)); | |
15953580 DW |
613 | jffs2_mark_node_obsolete(c, fd->raw); |
614 | /* We don't want to remove it from the list immediately, | |
615 | because that screws up getdents()/seek() semantics even | |
616 | more than they're screwed already. Turn it into a | |
617 | node-less deletion dirent instead -- a placeholder */ | |
618 | fd->raw = NULL; | |
619 | fd->ino = 0; | |
1da177e4 LT |
620 | break; |
621 | } | |
1da177e4 | 622 | } |
ced22070 | 623 | mutex_unlock(&dir_f->sem); |
1da177e4 LT |
624 | } |
625 | ||
626 | /* dead_f is NULL if this was a rename not a real unlink */ | |
627 | /* Also catch the !f->inocache case, where there was a dirent | |
628 | pointing to an inode which didn't exist. */ | |
182ec4ee | 629 | if (dead_f && dead_f->inocache) { |
1da177e4 | 630 | |
ced22070 | 631 | mutex_lock(&dead_f->sem); |
1da177e4 | 632 | |
32f1a95d AB |
633 | if (S_ISDIR(OFNI_EDONI_2SFFJ(dead_f)->i_mode)) { |
634 | while (dead_f->dents) { | |
635 | /* There can be only deleted ones */ | |
636 | fd = dead_f->dents; | |
182ec4ee | 637 | |
32f1a95d | 638 | dead_f->dents = fd->next; |
182ec4ee | 639 | |
32f1a95d | 640 | if (fd->ino) { |
da320f05 JP |
641 | pr_warn("Deleting inode #%u with active dentry \"%s\"->ino #%u\n", |
642 | dead_f->inocache->ino, | |
643 | fd->name, fd->ino); | |
32f1a95d | 644 | } else { |
9c261b33 JP |
645 | jffs2_dbg(1, "Removing deletion dirent for \"%s\" from dir ino #%u\n", |
646 | fd->name, | |
647 | dead_f->inocache->ino); | |
32f1a95d | 648 | } |
15953580 DW |
649 | if (fd->raw) |
650 | jffs2_mark_node_obsolete(c, fd->raw); | |
32f1a95d | 651 | jffs2_free_full_dirent(fd); |
1da177e4 | 652 | } |
27c72b04 DW |
653 | dead_f->inocache->pino_nlink = 0; |
654 | } else | |
655 | dead_f->inocache->pino_nlink--; | |
1da177e4 | 656 | /* NB: Caller must set inode nlink if appropriate */ |
ced22070 | 657 | mutex_unlock(&dead_f->sem); |
1da177e4 LT |
658 | } |
659 | ||
660 | jffs2_complete_reservation(c); | |
661 | ||
662 | return 0; | |
663 | } | |
664 | ||
665 | ||
3a69e0cd | 666 | int jffs2_do_link (struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, uint32_t ino, uint8_t type, const char *name, int namelen, uint32_t time) |
1da177e4 LT |
667 | { |
668 | struct jffs2_raw_dirent *rd; | |
669 | struct jffs2_full_dirent *fd; | |
9fe4854c | 670 | uint32_t alloclen; |
1da177e4 LT |
671 | int ret; |
672 | ||
673 | rd = jffs2_alloc_raw_dirent(); | |
674 | if (!rd) | |
675 | return -ENOMEM; | |
676 | ||
9fe4854c | 677 | ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, |
e631ddba | 678 | ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); |
1da177e4 LT |
679 | if (ret) { |
680 | jffs2_free_raw_dirent(rd); | |
681 | return ret; | |
682 | } | |
182ec4ee | 683 | |
ced22070 | 684 | mutex_lock(&dir_f->sem); |
1da177e4 LT |
685 | |
686 | /* Build a deletion node */ | |
687 | rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
688 | rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); | |
689 | rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); | |
690 | rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); | |
691 | ||
692 | rd->pino = cpu_to_je32(dir_f->inocache->ino); | |
693 | rd->version = cpu_to_je32(++dir_f->highest_version); | |
694 | rd->ino = cpu_to_je32(ino); | |
3a69e0cd | 695 | rd->mctime = cpu_to_je32(time); |
1da177e4 LT |
696 | rd->nsize = namelen; |
697 | ||
698 | rd->type = type; | |
699 | ||
700 | rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); | |
701 | rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); | |
702 | ||
9fe4854c | 703 | fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, ALLOC_NORMAL); |
182ec4ee | 704 | |
1da177e4 LT |
705 | jffs2_free_raw_dirent(rd); |
706 | ||
707 | if (IS_ERR(fd)) { | |
708 | jffs2_complete_reservation(c); | |
ced22070 | 709 | mutex_unlock(&dir_f->sem); |
1da177e4 LT |
710 | return PTR_ERR(fd); |
711 | } | |
712 | ||
713 | /* File it. This will mark the old one obsolete. */ | |
714 | jffs2_add_fd_to_list(c, fd, &dir_f->dents); | |
715 | ||
716 | jffs2_complete_reservation(c); | |
ced22070 | 717 | mutex_unlock(&dir_f->sem); |
1da177e4 LT |
718 | |
719 | return 0; | |
720 | } |