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Commit | Line | Data |
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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> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/pagemap.h> | |
17 | #include <linux/mtd/mtd.h> | |
18 | #include "nodelist.h" | |
19 | #include "compr.h" | |
20 | ||
21 | ||
27c72b04 DW |
22 | int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, |
23 | uint32_t mode, struct jffs2_raw_inode *ri) | |
1da177e4 LT |
24 | { |
25 | struct jffs2_inode_cache *ic; | |
26 | ||
27 | ic = jffs2_alloc_inode_cache(); | |
28 | if (!ic) { | |
29 | return -ENOMEM; | |
30 | } | |
31 | ||
32 | memset(ic, 0, sizeof(*ic)); | |
33 | ||
34 | f->inocache = ic; | |
27c72b04 | 35 | f->inocache->pino_nlink = 1; /* Will be overwritten shortly for directories */ |
1da177e4 | 36 | f->inocache->nodes = (struct jffs2_raw_node_ref *)f->inocache; |
1da177e4 | 37 | f->inocache->state = INO_STATE_PRESENT; |
1da177e4 | 38 | |
1da177e4 | 39 | jffs2_add_ino_cache(c, f->inocache); |
7d200960 DW |
40 | D1(printk(KERN_DEBUG "jffs2_do_new_inode(): Assigned ino# %d\n", f->inocache->ino)); |
41 | ri->ino = cpu_to_je32(f->inocache->ino); | |
1da177e4 LT |
42 | |
43 | ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
44 | ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); | |
45 | ri->totlen = cpu_to_je32(PAD(sizeof(*ri))); | |
46 | ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); | |
47 | ri->mode = cpu_to_jemode(mode); | |
48 | ||
49 | f->highest_version = 1; | |
50 | ri->version = cpu_to_je32(f->highest_version); | |
51 | ||
52 | return 0; | |
53 | } | |
54 | ||
182ec4ee | 55 | /* jffs2_write_dnode - given a raw_inode, allocate a full_dnode for it, |
1da177e4 LT |
56 | write it to the flash, link it into the existing inode/fragment list */ |
57 | ||
9fe4854c DW |
58 | struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, |
59 | struct jffs2_raw_inode *ri, const unsigned char *data, | |
60 | uint32_t datalen, int alloc_mode) | |
1da177e4 LT |
61 | |
62 | { | |
1da177e4 LT |
63 | struct jffs2_full_dnode *fn; |
64 | size_t retlen; | |
9fe4854c | 65 | uint32_t flash_ofs; |
1da177e4 LT |
66 | struct kvec vecs[2]; |
67 | int ret; | |
68 | int retried = 0; | |
69 | unsigned long cnt = 2; | |
70 | ||
71 | D1(if(je32_to_cpu(ri->hdr_crc) != crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)) { | |
72 | printk(KERN_CRIT "Eep. CRC not correct in jffs2_write_dnode()\n"); | |
73 | BUG(); | |
74 | } | |
75 | ); | |
76 | vecs[0].iov_base = ri; | |
77 | vecs[0].iov_len = sizeof(*ri); | |
78 | vecs[1].iov_base = (unsigned char *)data; | |
79 | vecs[1].iov_len = datalen; | |
80 | ||
1da177e4 LT |
81 | if (je32_to_cpu(ri->totlen) != sizeof(*ri) + datalen) { |
82 | printk(KERN_WARNING "jffs2_write_dnode: ri->totlen (0x%08x) != sizeof(*ri) (0x%08zx) + datalen (0x%08x)\n", je32_to_cpu(ri->totlen), sizeof(*ri), datalen); | |
83 | } | |
182ec4ee | 84 | |
1da177e4 | 85 | fn = jffs2_alloc_full_dnode(); |
2f785402 | 86 | if (!fn) |
1da177e4 | 87 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
88 | |
89 | /* check number of valid vecs */ | |
90 | if (!datalen || !data) | |
91 | cnt = 1; | |
92 | retry: | |
2f785402 | 93 | flash_ofs = write_ofs(c); |
9fe4854c DW |
94 | |
95 | jffs2_dbg_prewrite_paranoia_check(c, flash_ofs, vecs[0].iov_len + vecs[1].iov_len); | |
1da177e4 | 96 | |
9b88f473 EH |
97 | if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(ri->version) < f->highest_version)) { |
98 | BUG_ON(!retried); | |
99 | D1(printk(KERN_DEBUG "jffs2_write_dnode : dnode_version %d, " | |
182ec4ee | 100 | "highest version %d -> updating dnode\n", |
9b88f473 EH |
101 | je32_to_cpu(ri->version), f->highest_version)); |
102 | ri->version = cpu_to_je32(++f->highest_version); | |
103 | ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); | |
e4803c30 EH |
104 | } |
105 | ||
1da177e4 LT |
106 | ret = jffs2_flash_writev(c, vecs, cnt, flash_ofs, &retlen, |
107 | (alloc_mode==ALLOC_GC)?0:f->inocache->ino); | |
108 | ||
109 | if (ret || (retlen != sizeof(*ri) + datalen)) { | |
182ec4ee | 110 | printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", |
1da177e4 LT |
111 | sizeof(*ri)+datalen, flash_ofs, ret, retlen); |
112 | ||
113 | /* Mark the space as dirtied */ | |
114 | if (retlen) { | |
182ec4ee | 115 | /* Don't change raw->size to match retlen. We may have |
1da177e4 LT |
116 | written the node header already, and only the data will |
117 | seem corrupted, in which case the scan would skip over | |
182ec4ee | 118 | any node we write before the original intended end of |
1da177e4 | 119 | this node */ |
2f785402 | 120 | jffs2_add_physical_node_ref(c, flash_ofs | REF_OBSOLETE, PAD(sizeof(*ri)+datalen), NULL); |
1da177e4 | 121 | } else { |
2f785402 | 122 | printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", flash_ofs); |
1da177e4 | 123 | } |
2f785402 | 124 | if (!retried && alloc_mode != ALLOC_NORETRY) { |
1da177e4 LT |
125 | /* Try to reallocate space and retry */ |
126 | uint32_t dummy; | |
127 | struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; | |
128 | ||
129 | retried = 1; | |
130 | ||
131 | D1(printk(KERN_DEBUG "Retrying failed write.\n")); | |
182ec4ee | 132 | |
730554d9 AB |
133 | jffs2_dbg_acct_sanity_check(c,jeb); |
134 | jffs2_dbg_acct_paranoia_check(c, jeb); | |
1da177e4 LT |
135 | |
136 | if (alloc_mode == ALLOC_GC) { | |
9fe4854c DW |
137 | ret = jffs2_reserve_space_gc(c, sizeof(*ri) + datalen, &dummy, |
138 | JFFS2_SUMMARY_INODE_SIZE); | |
1da177e4 LT |
139 | } else { |
140 | /* Locking pain */ | |
ced22070 | 141 | mutex_unlock(&f->sem); |
1da177e4 | 142 | jffs2_complete_reservation(c); |
182ec4ee | 143 | |
9fe4854c DW |
144 | ret = jffs2_reserve_space(c, sizeof(*ri) + datalen, &dummy, |
145 | alloc_mode, JFFS2_SUMMARY_INODE_SIZE); | |
ced22070 | 146 | mutex_lock(&f->sem); |
1da177e4 LT |
147 | } |
148 | ||
149 | if (!ret) { | |
9fe4854c | 150 | flash_ofs = write_ofs(c); |
1da177e4 LT |
151 | D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write.\n", flash_ofs)); |
152 | ||
730554d9 AB |
153 | jffs2_dbg_acct_sanity_check(c,jeb); |
154 | jffs2_dbg_acct_paranoia_check(c, jeb); | |
1da177e4 LT |
155 | |
156 | goto retry; | |
157 | } | |
158 | D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d!\n", ret)); | |
1da177e4 LT |
159 | } |
160 | /* Release the full_dnode which is now useless, and return */ | |
161 | jffs2_free_full_dnode(fn); | |
162 | return ERR_PTR(ret?ret:-EIO); | |
163 | } | |
164 | /* Mark the space used */ | |
182ec4ee TG |
165 | /* If node covers at least a whole page, or if it starts at the |
166 | beginning of a page and runs to the end of the file, or if | |
167 | it's a hole node, mark it REF_PRISTINE, else REF_NORMAL. | |
1da177e4 LT |
168 | */ |
169 | if ((je32_to_cpu(ri->dsize) >= PAGE_CACHE_SIZE) || | |
170 | ( ((je32_to_cpu(ri->offset)&(PAGE_CACHE_SIZE-1))==0) && | |
171 | (je32_to_cpu(ri->dsize)+je32_to_cpu(ri->offset) == je32_to_cpu(ri->isize)))) { | |
2f785402 | 172 | flash_ofs |= REF_PRISTINE; |
1da177e4 | 173 | } else { |
2f785402 | 174 | flash_ofs |= REF_NORMAL; |
1da177e4 | 175 | } |
2f785402 | 176 | fn->raw = jffs2_add_physical_node_ref(c, flash_ofs, PAD(sizeof(*ri)+datalen), f->inocache); |
5bd5c03c JT |
177 | if (IS_ERR(fn->raw)) { |
178 | void *hold_err = fn->raw; | |
179 | /* Release the full_dnode which is now useless, and return */ | |
180 | jffs2_free_full_dnode(fn); | |
e231c2ee | 181 | return ERR_CAST(hold_err); |
5bd5c03c | 182 | } |
2f785402 DW |
183 | fn->ofs = je32_to_cpu(ri->offset); |
184 | fn->size = je32_to_cpu(ri->dsize); | |
185 | fn->frags = 0; | |
1da177e4 LT |
186 | |
187 | D1(printk(KERN_DEBUG "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 | 188 | flash_ofs & ~3, flash_ofs & 3, je32_to_cpu(ri->dsize), |
1da177e4 LT |
189 | je32_to_cpu(ri->csize), je32_to_cpu(ri->node_crc), |
190 | je32_to_cpu(ri->data_crc), je32_to_cpu(ri->totlen))); | |
191 | ||
192 | if (retried) { | |
730554d9 | 193 | jffs2_dbg_acct_sanity_check(c,NULL); |
1da177e4 LT |
194 | } |
195 | ||
196 | return fn; | |
197 | } | |
198 | ||
9fe4854c DW |
199 | struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jffs2_inode_info *f, |
200 | struct jffs2_raw_dirent *rd, const unsigned char *name, | |
201 | uint32_t namelen, int alloc_mode) | |
1da177e4 | 202 | { |
1da177e4 LT |
203 | struct jffs2_full_dirent *fd; |
204 | size_t retlen; | |
205 | struct kvec vecs[2]; | |
2f785402 | 206 | uint32_t flash_ofs; |
1da177e4 LT |
207 | int retried = 0; |
208 | int ret; | |
209 | ||
182ec4ee | 210 | D1(printk(KERN_DEBUG "jffs2_write_dirent(ino #%u, name at *0x%p \"%s\"->ino #%u, name_crc 0x%08x)\n", |
1da177e4 LT |
211 | je32_to_cpu(rd->pino), name, name, je32_to_cpu(rd->ino), |
212 | je32_to_cpu(rd->name_crc))); | |
730554d9 | 213 | |
1da177e4 LT |
214 | D1(if(je32_to_cpu(rd->hdr_crc) != crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)) { |
215 | printk(KERN_CRIT "Eep. CRC not correct in jffs2_write_dirent()\n"); | |
216 | BUG(); | |
2f785402 | 217 | }); |
1da177e4 | 218 | |
69ca4378 DW |
219 | if (strnlen(name, namelen) != namelen) { |
220 | /* This should never happen, but seems to have done on at least one | |
221 | occasion: https://dev.laptop.org/ticket/4184 */ | |
222 | printk(KERN_CRIT "Error in jffs2_write_dirent() -- name contains zero bytes!\n"); | |
223 | printk(KERN_CRIT "Directory inode #%u, name at *0x%p \"%s\"->ino #%u, name_crc 0x%08x\n", | |
224 | je32_to_cpu(rd->pino), name, name, je32_to_cpu(rd->ino), | |
225 | je32_to_cpu(rd->name_crc)); | |
226 | WARN_ON(1); | |
227 | return ERR_PTR(-EIO); | |
228 | } | |
229 | ||
1da177e4 LT |
230 | vecs[0].iov_base = rd; |
231 | vecs[0].iov_len = sizeof(*rd); | |
232 | vecs[1].iov_base = (unsigned char *)name; | |
233 | vecs[1].iov_len = namelen; | |
182ec4ee | 234 | |
1da177e4 | 235 | fd = jffs2_alloc_full_dirent(namelen+1); |
2f785402 | 236 | if (!fd) |
1da177e4 | 237 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
238 | |
239 | fd->version = je32_to_cpu(rd->version); | |
240 | fd->ino = je32_to_cpu(rd->ino); | |
69ca4378 | 241 | fd->nhash = full_name_hash(name, namelen); |
1da177e4 LT |
242 | fd->type = rd->type; |
243 | memcpy(fd->name, name, namelen); | |
244 | fd->name[namelen]=0; | |
245 | ||
246 | retry: | |
2f785402 | 247 | flash_ofs = write_ofs(c); |
1da177e4 | 248 | |
2f785402 | 249 | jffs2_dbg_prewrite_paranoia_check(c, flash_ofs, vecs[0].iov_len + vecs[1].iov_len); |
1da177e4 | 250 | |
9b88f473 EH |
251 | if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(rd->version) < f->highest_version)) { |
252 | BUG_ON(!retried); | |
253 | D1(printk(KERN_DEBUG "jffs2_write_dirent : dirent_version %d, " | |
254 | "highest version %d -> updating dirent\n", | |
255 | je32_to_cpu(rd->version), f->highest_version)); | |
256 | rd->version = cpu_to_je32(++f->highest_version); | |
257 | fd->version = je32_to_cpu(rd->version); | |
258 | rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); | |
e4803c30 EH |
259 | } |
260 | ||
1da177e4 LT |
261 | ret = jffs2_flash_writev(c, vecs, 2, flash_ofs, &retlen, |
262 | (alloc_mode==ALLOC_GC)?0:je32_to_cpu(rd->pino)); | |
263 | if (ret || (retlen != sizeof(*rd) + namelen)) { | |
182ec4ee | 264 | printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", |
1da177e4 LT |
265 | sizeof(*rd)+namelen, flash_ofs, ret, retlen); |
266 | /* Mark the space as dirtied */ | |
267 | if (retlen) { | |
2f785402 | 268 | jffs2_add_physical_node_ref(c, flash_ofs | REF_OBSOLETE, PAD(sizeof(*rd)+namelen), NULL); |
1da177e4 | 269 | } else { |
2f785402 | 270 | printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", flash_ofs); |
1da177e4 | 271 | } |
2f785402 | 272 | if (!retried) { |
1da177e4 LT |
273 | /* Try to reallocate space and retry */ |
274 | uint32_t dummy; | |
275 | struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; | |
276 | ||
277 | retried = 1; | |
278 | ||
279 | D1(printk(KERN_DEBUG "Retrying failed write.\n")); | |
280 | ||
730554d9 AB |
281 | jffs2_dbg_acct_sanity_check(c,jeb); |
282 | jffs2_dbg_acct_paranoia_check(c, jeb); | |
1da177e4 LT |
283 | |
284 | if (alloc_mode == ALLOC_GC) { | |
9fe4854c DW |
285 | ret = jffs2_reserve_space_gc(c, sizeof(*rd) + namelen, &dummy, |
286 | JFFS2_SUMMARY_DIRENT_SIZE(namelen)); | |
1da177e4 LT |
287 | } else { |
288 | /* Locking pain */ | |
ced22070 | 289 | mutex_unlock(&f->sem); |
1da177e4 | 290 | jffs2_complete_reservation(c); |
182ec4ee | 291 | |
9fe4854c DW |
292 | ret = jffs2_reserve_space(c, sizeof(*rd) + namelen, &dummy, |
293 | alloc_mode, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); | |
ced22070 | 294 | mutex_lock(&f->sem); |
1da177e4 LT |
295 | } |
296 | ||
297 | if (!ret) { | |
9fe4854c | 298 | flash_ofs = write_ofs(c); |
1da177e4 | 299 | D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write.\n", flash_ofs)); |
730554d9 AB |
300 | jffs2_dbg_acct_sanity_check(c,jeb); |
301 | jffs2_dbg_acct_paranoia_check(c, jeb); | |
1da177e4 LT |
302 | goto retry; |
303 | } | |
304 | D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d!\n", ret)); | |
1da177e4 LT |
305 | } |
306 | /* Release the full_dnode which is now useless, and return */ | |
307 | jffs2_free_full_dirent(fd); | |
308 | return ERR_PTR(ret?ret:-EIO); | |
309 | } | |
310 | /* Mark the space used */ | |
71c23397 DW |
311 | fd->raw = jffs2_add_physical_node_ref(c, flash_ofs | dirent_node_state(rd), |
312 | PAD(sizeof(*rd)+namelen), f->inocache); | |
5bd5c03c JT |
313 | if (IS_ERR(fd->raw)) { |
314 | void *hold_err = fd->raw; | |
315 | /* Release the full_dirent which is now useless, and return */ | |
316 | jffs2_free_full_dirent(fd); | |
e231c2ee | 317 | return ERR_CAST(hold_err); |
5bd5c03c | 318 | } |
1da177e4 LT |
319 | |
320 | if (retried) { | |
730554d9 | 321 | jffs2_dbg_acct_sanity_check(c,NULL); |
1da177e4 LT |
322 | } |
323 | ||
324 | return fd; | |
325 | } | |
326 | ||
327 | /* The OS-specific code fills in the metadata in the jffs2_raw_inode for us, so that | |
328 | we don't have to go digging in struct inode or its equivalent. It should set: | |
329 | mode, uid, gid, (starting)isize, atime, ctime, mtime */ | |
330 | int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, | |
182ec4ee | 331 | struct jffs2_raw_inode *ri, unsigned char *buf, |
1da177e4 LT |
332 | uint32_t offset, uint32_t writelen, uint32_t *retlen) |
333 | { | |
334 | int ret = 0; | |
335 | uint32_t writtenlen = 0; | |
336 | ||
337 | D1(printk(KERN_DEBUG "jffs2_write_inode_range(): Ino #%u, ofs 0x%x, len 0x%x\n", | |
338 | f->inocache->ino, offset, writelen)); | |
182ec4ee | 339 | |
1da177e4 LT |
340 | while(writelen) { |
341 | struct jffs2_full_dnode *fn; | |
342 | unsigned char *comprbuf = NULL; | |
343 | uint16_t comprtype = JFFS2_COMPR_NONE; | |
9fe4854c | 344 | uint32_t alloclen; |
1da177e4 LT |
345 | uint32_t datalen, cdatalen; |
346 | int retried = 0; | |
347 | ||
348 | retry: | |
349 | D2(printk(KERN_DEBUG "jffs2_commit_write() loop: 0x%x to write to 0x%x\n", writelen, offset)); | |
350 | ||
9fe4854c | 351 | ret = jffs2_reserve_space(c, sizeof(*ri) + JFFS2_MIN_DATA_LEN, |
e631ddba | 352 | &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); |
1da177e4 LT |
353 | if (ret) { |
354 | D1(printk(KERN_DEBUG "jffs2_reserve_space returned %d\n", ret)); | |
355 | break; | |
356 | } | |
ced22070 | 357 | mutex_lock(&f->sem); |
1da177e4 LT |
358 | datalen = min_t(uint32_t, writelen, PAGE_CACHE_SIZE - (offset & (PAGE_CACHE_SIZE-1))); |
359 | cdatalen = min_t(uint32_t, alloclen - sizeof(*ri), datalen); | |
360 | ||
361 | comprtype = jffs2_compress(c, f, buf, &comprbuf, &datalen, &cdatalen); | |
362 | ||
363 | ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
364 | ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); | |
365 | ri->totlen = cpu_to_je32(sizeof(*ri) + cdatalen); | |
366 | ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); | |
367 | ||
368 | ri->ino = cpu_to_je32(f->inocache->ino); | |
369 | ri->version = cpu_to_je32(++f->highest_version); | |
370 | ri->isize = cpu_to_je32(max(je32_to_cpu(ri->isize), offset + datalen)); | |
371 | ri->offset = cpu_to_je32(offset); | |
372 | ri->csize = cpu_to_je32(cdatalen); | |
373 | ri->dsize = cpu_to_je32(datalen); | |
374 | ri->compr = comprtype & 0xff; | |
375 | ri->usercompr = (comprtype >> 8 ) & 0xff; | |
376 | ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); | |
377 | ri->data_crc = cpu_to_je32(crc32(0, comprbuf, cdatalen)); | |
378 | ||
9fe4854c | 379 | fn = jffs2_write_dnode(c, f, ri, comprbuf, cdatalen, ALLOC_NORETRY); |
1da177e4 LT |
380 | |
381 | jffs2_free_comprbuf(comprbuf, buf); | |
382 | ||
383 | if (IS_ERR(fn)) { | |
384 | ret = PTR_ERR(fn); | |
ced22070 | 385 | mutex_unlock(&f->sem); |
1da177e4 LT |
386 | jffs2_complete_reservation(c); |
387 | if (!retried) { | |
388 | /* Write error to be retried */ | |
389 | retried = 1; | |
390 | D1(printk(KERN_DEBUG "Retrying node write in jffs2_write_inode_range()\n")); | |
391 | goto retry; | |
392 | } | |
393 | break; | |
394 | } | |
395 | ret = jffs2_add_full_dnode_to_inode(c, f, fn); | |
396 | if (f->metadata) { | |
397 | jffs2_mark_node_obsolete(c, f->metadata->raw); | |
398 | jffs2_free_full_dnode(f->metadata); | |
399 | f->metadata = NULL; | |
400 | } | |
401 | if (ret) { | |
402 | /* Eep */ | |
403 | D1(printk(KERN_DEBUG "Eep. add_full_dnode_to_inode() failed in commit_write, returned %d\n", ret)); | |
404 | jffs2_mark_node_obsolete(c, fn->raw); | |
405 | jffs2_free_full_dnode(fn); | |
406 | ||
ced22070 | 407 | mutex_unlock(&f->sem); |
1da177e4 LT |
408 | jffs2_complete_reservation(c); |
409 | break; | |
410 | } | |
ced22070 | 411 | mutex_unlock(&f->sem); |
1da177e4 LT |
412 | jffs2_complete_reservation(c); |
413 | if (!datalen) { | |
414 | printk(KERN_WARNING "Eep. We didn't actually write any data in jffs2_write_inode_range()\n"); | |
415 | ret = -EIO; | |
416 | break; | |
417 | } | |
418 | D1(printk(KERN_DEBUG "increasing writtenlen by %d\n", datalen)); | |
419 | writtenlen += datalen; | |
420 | offset += datalen; | |
421 | writelen -= datalen; | |
422 | buf += datalen; | |
423 | } | |
424 | *retlen = writtenlen; | |
425 | return ret; | |
426 | } | |
427 | ||
428 | int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, struct jffs2_inode_info *f, struct jffs2_raw_inode *ri, const char *name, int namelen) | |
429 | { | |
430 | struct jffs2_raw_dirent *rd; | |
431 | struct jffs2_full_dnode *fn; | |
432 | struct jffs2_full_dirent *fd; | |
9fe4854c | 433 | uint32_t alloclen; |
1da177e4 LT |
434 | int ret; |
435 | ||
182ec4ee TG |
436 | /* Try to reserve enough space for both node and dirent. |
437 | * Just the node will do for now, though | |
1da177e4 | 438 | */ |
9fe4854c | 439 | ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL, |
e631ddba | 440 | JFFS2_SUMMARY_INODE_SIZE); |
1da177e4 | 441 | D1(printk(KERN_DEBUG "jffs2_do_create(): reserved 0x%x bytes\n", alloclen)); |
590fe34c | 442 | if (ret) |
1da177e4 | 443 | return ret; |
590fe34c DW |
444 | |
445 | mutex_lock(&f->sem); | |
1da177e4 LT |
446 | |
447 | ri->data_crc = cpu_to_je32(0); | |
448 | ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); | |
449 | ||
9fe4854c | 450 | fn = jffs2_write_dnode(c, f, ri, NULL, 0, ALLOC_NORMAL); |
1da177e4 LT |
451 | |
452 | D1(printk(KERN_DEBUG "jffs2_do_create created file with mode 0x%x\n", | |
453 | jemode_to_cpu(ri->mode))); | |
454 | ||
455 | if (IS_ERR(fn)) { | |
456 | D1(printk(KERN_DEBUG "jffs2_write_dnode() failed\n")); | |
457 | /* Eeek. Wave bye bye */ | |
ced22070 | 458 | mutex_unlock(&f->sem); |
1da177e4 LT |
459 | jffs2_complete_reservation(c); |
460 | return PTR_ERR(fn); | |
461 | } | |
182ec4ee | 462 | /* No data here. Only a metadata node, which will be |
1da177e4 LT |
463 | obsoleted by the first data write |
464 | */ | |
465 | f->metadata = fn; | |
466 | ||
ced22070 | 467 | mutex_unlock(&f->sem); |
1da177e4 | 468 | jffs2_complete_reservation(c); |
cfc8dc6f KK |
469 | |
470 | ret = jffs2_init_security(&f->vfs_inode, &dir_f->vfs_inode); | |
471 | if (ret) | |
472 | return ret; | |
473 | ret = jffs2_init_acl_post(&f->vfs_inode); | |
474 | if (ret) | |
475 | return ret; | |
476 | ||
9fe4854c | 477 | ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, |
e631ddba | 478 | ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); |
182ec4ee | 479 | |
1da177e4 LT |
480 | if (ret) { |
481 | /* Eep. */ | |
482 | D1(printk(KERN_DEBUG "jffs2_reserve_space() for dirent failed\n")); | |
483 | return ret; | |
484 | } | |
485 | ||
486 | rd = jffs2_alloc_raw_dirent(); | |
487 | if (!rd) { | |
488 | /* Argh. Now we treat it like a normal delete */ | |
489 | jffs2_complete_reservation(c); | |
490 | return -ENOMEM; | |
491 | } | |
492 | ||
ced22070 | 493 | mutex_lock(&dir_f->sem); |
1da177e4 LT |
494 | |
495 | rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
496 | rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); | |
497 | rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); | |
498 | rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); | |
499 | ||
500 | rd->pino = cpu_to_je32(dir_f->inocache->ino); | |
501 | rd->version = cpu_to_je32(++dir_f->highest_version); | |
502 | rd->ino = ri->ino; | |
503 | rd->mctime = ri->ctime; | |
504 | rd->nsize = namelen; | |
505 | rd->type = DT_REG; | |
506 | rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); | |
507 | rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); | |
508 | ||
9fe4854c | 509 | fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, ALLOC_NORMAL); |
1da177e4 LT |
510 | |
511 | jffs2_free_raw_dirent(rd); | |
182ec4ee | 512 | |
1da177e4 | 513 | if (IS_ERR(fd)) { |
182ec4ee | 514 | /* dirent failed to write. Delete the inode normally |
1da177e4 LT |
515 | as if it were the final unlink() */ |
516 | jffs2_complete_reservation(c); | |
ced22070 | 517 | mutex_unlock(&dir_f->sem); |
1da177e4 LT |
518 | return PTR_ERR(fd); |
519 | } | |
520 | ||
521 | /* Link the fd into the inode's list, obsoleting an old | |
522 | one if necessary. */ | |
523 | jffs2_add_fd_to_list(c, fd, &dir_f->dents); | |
524 | ||
525 | jffs2_complete_reservation(c); | |
ced22070 | 526 | mutex_unlock(&dir_f->sem); |
1da177e4 LT |
527 | |
528 | return 0; | |
529 | } | |
530 | ||
531 | ||
532 | int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, | |
3a69e0cd AB |
533 | const char *name, int namelen, struct jffs2_inode_info *dead_f, |
534 | uint32_t time) | |
1da177e4 LT |
535 | { |
536 | struct jffs2_raw_dirent *rd; | |
537 | struct jffs2_full_dirent *fd; | |
9fe4854c | 538 | uint32_t alloclen; |
1da177e4 LT |
539 | int ret; |
540 | ||
a491486a | 541 | if (!jffs2_can_mark_obsolete(c)) { |
1da177e4 LT |
542 | /* We can't mark stuff obsolete on the medium. We need to write a deletion dirent */ |
543 | ||
544 | rd = jffs2_alloc_raw_dirent(); | |
545 | if (!rd) | |
546 | return -ENOMEM; | |
547 | ||
9fe4854c | 548 | ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, |
e631ddba | 549 | ALLOC_DELETION, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); |
1da177e4 LT |
550 | if (ret) { |
551 | jffs2_free_raw_dirent(rd); | |
552 | return ret; | |
553 | } | |
554 | ||
ced22070 | 555 | mutex_lock(&dir_f->sem); |
1da177e4 LT |
556 | |
557 | /* Build a deletion node */ | |
558 | rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
559 | rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); | |
560 | rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); | |
561 | rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); | |
182ec4ee | 562 | |
1da177e4 LT |
563 | rd->pino = cpu_to_je32(dir_f->inocache->ino); |
564 | rd->version = cpu_to_je32(++dir_f->highest_version); | |
565 | rd->ino = cpu_to_je32(0); | |
3a69e0cd | 566 | rd->mctime = cpu_to_je32(time); |
1da177e4 LT |
567 | rd->nsize = namelen; |
568 | rd->type = DT_UNKNOWN; | |
569 | rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); | |
570 | rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); | |
571 | ||
9fe4854c | 572 | fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, ALLOC_DELETION); |
182ec4ee | 573 | |
1da177e4 LT |
574 | jffs2_free_raw_dirent(rd); |
575 | ||
576 | if (IS_ERR(fd)) { | |
577 | jffs2_complete_reservation(c); | |
ced22070 | 578 | mutex_unlock(&dir_f->sem); |
1da177e4 LT |
579 | return PTR_ERR(fd); |
580 | } | |
581 | ||
582 | /* File it. This will mark the old one obsolete. */ | |
583 | jffs2_add_fd_to_list(c, fd, &dir_f->dents); | |
ced22070 | 584 | mutex_unlock(&dir_f->sem); |
1da177e4 | 585 | } else { |
1da177e4 LT |
586 | uint32_t nhash = full_name_hash(name, namelen); |
587 | ||
bf66737c | 588 | fd = dir_f->dents; |
b5748643 DW |
589 | /* We don't actually want to reserve any space, but we do |
590 | want to be holding the alloc_sem when we write to flash */ | |
ced22070 DW |
591 | mutex_lock(&c->alloc_sem); |
592 | mutex_lock(&dir_f->sem); | |
1da177e4 | 593 | |
15953580 DW |
594 | for (fd = dir_f->dents; fd; fd = fd->next) { |
595 | if (fd->nhash == nhash && | |
596 | !memcmp(fd->name, name, namelen) && | |
597 | !fd->name[namelen]) { | |
1da177e4 LT |
598 | |
599 | D1(printk(KERN_DEBUG "Marking old dirent node (ino #%u) @%08x obsolete\n", | |
15953580 DW |
600 | fd->ino, ref_offset(fd->raw))); |
601 | jffs2_mark_node_obsolete(c, fd->raw); | |
602 | /* We don't want to remove it from the list immediately, | |
603 | because that screws up getdents()/seek() semantics even | |
604 | more than they're screwed already. Turn it into a | |
605 | node-less deletion dirent instead -- a placeholder */ | |
606 | fd->raw = NULL; | |
607 | fd->ino = 0; | |
1da177e4 LT |
608 | break; |
609 | } | |
1da177e4 | 610 | } |
ced22070 | 611 | mutex_unlock(&dir_f->sem); |
1da177e4 LT |
612 | } |
613 | ||
614 | /* dead_f is NULL if this was a rename not a real unlink */ | |
615 | /* Also catch the !f->inocache case, where there was a dirent | |
616 | pointing to an inode which didn't exist. */ | |
182ec4ee | 617 | if (dead_f && dead_f->inocache) { |
1da177e4 | 618 | |
ced22070 | 619 | mutex_lock(&dead_f->sem); |
1da177e4 | 620 | |
32f1a95d AB |
621 | if (S_ISDIR(OFNI_EDONI_2SFFJ(dead_f)->i_mode)) { |
622 | while (dead_f->dents) { | |
623 | /* There can be only deleted ones */ | |
624 | fd = dead_f->dents; | |
182ec4ee | 625 | |
32f1a95d | 626 | dead_f->dents = fd->next; |
182ec4ee | 627 | |
32f1a95d AB |
628 | if (fd->ino) { |
629 | printk(KERN_WARNING "Deleting inode #%u with active dentry \"%s\"->ino #%u\n", | |
630 | dead_f->inocache->ino, fd->name, fd->ino); | |
631 | } else { | |
632 | D1(printk(KERN_DEBUG "Removing deletion dirent for \"%s\" from dir ino #%u\n", | |
633 | fd->name, dead_f->inocache->ino)); | |
634 | } | |
15953580 DW |
635 | if (fd->raw) |
636 | jffs2_mark_node_obsolete(c, fd->raw); | |
32f1a95d | 637 | jffs2_free_full_dirent(fd); |
1da177e4 | 638 | } |
27c72b04 DW |
639 | dead_f->inocache->pino_nlink = 0; |
640 | } else | |
641 | dead_f->inocache->pino_nlink--; | |
1da177e4 | 642 | /* NB: Caller must set inode nlink if appropriate */ |
ced22070 | 643 | mutex_unlock(&dead_f->sem); |
1da177e4 LT |
644 | } |
645 | ||
646 | jffs2_complete_reservation(c); | |
647 | ||
648 | return 0; | |
649 | } | |
650 | ||
651 | ||
3a69e0cd | 652 | 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 |
653 | { |
654 | struct jffs2_raw_dirent *rd; | |
655 | struct jffs2_full_dirent *fd; | |
9fe4854c | 656 | uint32_t alloclen; |
1da177e4 LT |
657 | int ret; |
658 | ||
659 | rd = jffs2_alloc_raw_dirent(); | |
660 | if (!rd) | |
661 | return -ENOMEM; | |
662 | ||
9fe4854c | 663 | ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, |
e631ddba | 664 | ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); |
1da177e4 LT |
665 | if (ret) { |
666 | jffs2_free_raw_dirent(rd); | |
667 | return ret; | |
668 | } | |
182ec4ee | 669 | |
ced22070 | 670 | mutex_lock(&dir_f->sem); |
1da177e4 LT |
671 | |
672 | /* Build a deletion node */ | |
673 | rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
674 | rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); | |
675 | rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); | |
676 | rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); | |
677 | ||
678 | rd->pino = cpu_to_je32(dir_f->inocache->ino); | |
679 | rd->version = cpu_to_je32(++dir_f->highest_version); | |
680 | rd->ino = cpu_to_je32(ino); | |
3a69e0cd | 681 | rd->mctime = cpu_to_je32(time); |
1da177e4 LT |
682 | rd->nsize = namelen; |
683 | ||
684 | rd->type = type; | |
685 | ||
686 | rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); | |
687 | rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); | |
688 | ||
9fe4854c | 689 | fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, ALLOC_NORMAL); |
182ec4ee | 690 | |
1da177e4 LT |
691 | jffs2_free_raw_dirent(rd); |
692 | ||
693 | if (IS_ERR(fd)) { | |
694 | jffs2_complete_reservation(c); | |
ced22070 | 695 | mutex_unlock(&dir_f->sem); |
1da177e4 LT |
696 | return PTR_ERR(fd); |
697 | } | |
698 | ||
699 | /* File it. This will mark the old one obsolete. */ | |
700 | jffs2_add_fd_to_list(c, fd, &dir_f->dents); | |
701 | ||
702 | jffs2_complete_reservation(c); | |
ced22070 | 703 | mutex_unlock(&dir_f->sem); |
1da177e4 LT |
704 | |
705 | return 0; | |
706 | } |