Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * JFFS2 -- Journalling Flash File System, Version 2. | |
3 | * | |
4 | * Copyright (C) 2001-2003 Red Hat, Inc. | |
5 | * | |
6 | * Created by David Woodhouse <dwmw2@infradead.org> | |
7 | * | |
8 | * For licensing information, see the file 'LICENCE' in this directory. | |
9 | * | |
182ec4ee | 10 | * $Id: write.c,v 1.97 2005/11/07 11:14:42 gleixner Exp $ |
1da177e4 LT |
11 | * |
12 | */ | |
13 | ||
14 | #include <linux/kernel.h> | |
15 | #include <linux/fs.h> | |
16 | #include <linux/crc32.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/pagemap.h> | |
19 | #include <linux/mtd/mtd.h> | |
20 | #include "nodelist.h" | |
21 | #include "compr.h" | |
22 | ||
23 | ||
24 | int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint32_t mode, struct jffs2_raw_inode *ri) | |
25 | { | |
26 | struct jffs2_inode_cache *ic; | |
27 | ||
28 | ic = jffs2_alloc_inode_cache(); | |
29 | if (!ic) { | |
30 | return -ENOMEM; | |
31 | } | |
32 | ||
33 | memset(ic, 0, sizeof(*ic)); | |
34 | ||
35 | f->inocache = ic; | |
36 | f->inocache->nlink = 1; | |
37 | f->inocache->nodes = (struct jffs2_raw_node_ref *)f->inocache; | |
1da177e4 | 38 | f->inocache->state = INO_STATE_PRESENT; |
1da177e4 | 39 | |
1da177e4 | 40 | jffs2_add_ino_cache(c, f->inocache); |
7d200960 DW |
41 | D1(printk(KERN_DEBUG "jffs2_do_new_inode(): Assigned ino# %d\n", f->inocache->ino)); |
42 | ri->ino = cpu_to_je32(f->inocache->ino); | |
1da177e4 LT |
43 | |
44 | ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
45 | ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); | |
46 | ri->totlen = cpu_to_je32(PAD(sizeof(*ri))); | |
47 | ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); | |
48 | ri->mode = cpu_to_jemode(mode); | |
49 | ||
50 | f->highest_version = 1; | |
51 | ri->version = cpu_to_je32(f->highest_version); | |
52 | ||
53 | return 0; | |
54 | } | |
55 | ||
182ec4ee | 56 | /* jffs2_write_dnode - given a raw_inode, allocate a full_dnode for it, |
1da177e4 LT |
57 | write it to the flash, link it into the existing inode/fragment list */ |
58 | ||
59 | struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_raw_inode *ri, const unsigned char *data, uint32_t datalen, uint32_t flash_ofs, int alloc_mode) | |
60 | ||
61 | { | |
62 | struct jffs2_raw_node_ref *raw; | |
63 | struct jffs2_full_dnode *fn; | |
64 | size_t retlen; | |
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)) { | |
71 | printk(KERN_CRIT "Eep. CRC not correct in jffs2_write_dnode()\n"); | |
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 | ||
730554d9 | 80 | jffs2_dbg_prewrite_paranoia_check(c, flash_ofs, vecs[0].iov_len + vecs[1].iov_len); |
1da177e4 LT |
81 | |
82 | if (je32_to_cpu(ri->totlen) != sizeof(*ri) + datalen) { | |
83 | 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); | |
84 | } | |
85 | raw = jffs2_alloc_raw_node_ref(); | |
86 | if (!raw) | |
87 | return ERR_PTR(-ENOMEM); | |
182ec4ee | 88 | |
1da177e4 LT |
89 | fn = jffs2_alloc_full_dnode(); |
90 | if (!fn) { | |
91 | jffs2_free_raw_node_ref(raw); | |
92 | return ERR_PTR(-ENOMEM); | |
93 | } | |
94 | ||
95 | fn->ofs = je32_to_cpu(ri->offset); | |
96 | fn->size = je32_to_cpu(ri->dsize); | |
97 | fn->frags = 0; | |
98 | ||
99 | /* check number of valid vecs */ | |
100 | if (!datalen || !data) | |
101 | cnt = 1; | |
102 | retry: | |
103 | fn->raw = raw; | |
104 | ||
105 | raw->flash_offset = flash_ofs; | |
106 | raw->__totlen = PAD(sizeof(*ri)+datalen); | |
107 | raw->next_phys = NULL; | |
108 | ||
9b88f473 EH |
109 | if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(ri->version) < f->highest_version)) { |
110 | BUG_ON(!retried); | |
111 | D1(printk(KERN_DEBUG "jffs2_write_dnode : dnode_version %d, " | |
182ec4ee | 112 | "highest version %d -> updating dnode\n", |
9b88f473 EH |
113 | je32_to_cpu(ri->version), f->highest_version)); |
114 | ri->version = cpu_to_je32(++f->highest_version); | |
115 | ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); | |
e4803c30 EH |
116 | } |
117 | ||
1da177e4 LT |
118 | ret = jffs2_flash_writev(c, vecs, cnt, flash_ofs, &retlen, |
119 | (alloc_mode==ALLOC_GC)?0:f->inocache->ino); | |
120 | ||
121 | if (ret || (retlen != sizeof(*ri) + datalen)) { | |
182ec4ee | 122 | printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", |
1da177e4 LT |
123 | sizeof(*ri)+datalen, flash_ofs, ret, retlen); |
124 | ||
125 | /* Mark the space as dirtied */ | |
126 | if (retlen) { | |
127 | /* Doesn't belong to any inode */ | |
128 | raw->next_in_ino = NULL; | |
129 | ||
182ec4ee | 130 | /* Don't change raw->size to match retlen. We may have |
1da177e4 LT |
131 | written the node header already, and only the data will |
132 | seem corrupted, in which case the scan would skip over | |
182ec4ee | 133 | any node we write before the original intended end of |
1da177e4 LT |
134 | this node */ |
135 | raw->flash_offset |= REF_OBSOLETE; | |
136 | jffs2_add_physical_node_ref(c, raw); | |
137 | jffs2_mark_node_obsolete(c, raw); | |
138 | } else { | |
139 | printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", raw->flash_offset); | |
140 | jffs2_free_raw_node_ref(raw); | |
141 | } | |
142 | if (!retried && alloc_mode != ALLOC_NORETRY && (raw = jffs2_alloc_raw_node_ref())) { | |
143 | /* Try to reallocate space and retry */ | |
144 | uint32_t dummy; | |
145 | struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; | |
146 | ||
147 | retried = 1; | |
148 | ||
149 | D1(printk(KERN_DEBUG "Retrying failed write.\n")); | |
182ec4ee | 150 | |
730554d9 AB |
151 | jffs2_dbg_acct_sanity_check(c,jeb); |
152 | jffs2_dbg_acct_paranoia_check(c, jeb); | |
1da177e4 LT |
153 | |
154 | if (alloc_mode == ALLOC_GC) { | |
e631ddba FH |
155 | ret = jffs2_reserve_space_gc(c, sizeof(*ri) + datalen, &flash_ofs, |
156 | &dummy, JFFS2_SUMMARY_INODE_SIZE); | |
1da177e4 LT |
157 | } else { |
158 | /* Locking pain */ | |
159 | up(&f->sem); | |
160 | jffs2_complete_reservation(c); | |
182ec4ee | 161 | |
e631ddba FH |
162 | ret = jffs2_reserve_space(c, sizeof(*ri) + datalen, &flash_ofs, |
163 | &dummy, alloc_mode, JFFS2_SUMMARY_INODE_SIZE); | |
1da177e4 LT |
164 | down(&f->sem); |
165 | } | |
166 | ||
167 | if (!ret) { | |
168 | D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write.\n", flash_ofs)); | |
169 | ||
730554d9 AB |
170 | jffs2_dbg_acct_sanity_check(c,jeb); |
171 | jffs2_dbg_acct_paranoia_check(c, jeb); | |
1da177e4 LT |
172 | |
173 | goto retry; | |
174 | } | |
175 | D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d!\n", ret)); | |
176 | jffs2_free_raw_node_ref(raw); | |
177 | } | |
178 | /* Release the full_dnode which is now useless, and return */ | |
179 | jffs2_free_full_dnode(fn); | |
180 | return ERR_PTR(ret?ret:-EIO); | |
181 | } | |
182 | /* Mark the space used */ | |
182ec4ee TG |
183 | /* If node covers at least a whole page, or if it starts at the |
184 | beginning of a page and runs to the end of the file, or if | |
185 | it's a hole node, mark it REF_PRISTINE, else REF_NORMAL. | |
1da177e4 LT |
186 | */ |
187 | if ((je32_to_cpu(ri->dsize) >= PAGE_CACHE_SIZE) || | |
188 | ( ((je32_to_cpu(ri->offset)&(PAGE_CACHE_SIZE-1))==0) && | |
189 | (je32_to_cpu(ri->dsize)+je32_to_cpu(ri->offset) == je32_to_cpu(ri->isize)))) { | |
190 | raw->flash_offset |= REF_PRISTINE; | |
191 | } else { | |
192 | raw->flash_offset |= REF_NORMAL; | |
193 | } | |
194 | jffs2_add_physical_node_ref(c, raw); | |
195 | ||
196 | /* Link into per-inode list */ | |
197 | spin_lock(&c->erase_completion_lock); | |
198 | raw->next_in_ino = f->inocache->nodes; | |
199 | f->inocache->nodes = raw; | |
200 | spin_unlock(&c->erase_completion_lock); | |
201 | ||
202 | 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", | |
182ec4ee | 203 | flash_ofs, ref_flags(raw), je32_to_cpu(ri->dsize), |
1da177e4 LT |
204 | je32_to_cpu(ri->csize), je32_to_cpu(ri->node_crc), |
205 | je32_to_cpu(ri->data_crc), je32_to_cpu(ri->totlen))); | |
206 | ||
207 | if (retried) { | |
730554d9 | 208 | jffs2_dbg_acct_sanity_check(c,NULL); |
1da177e4 LT |
209 | } |
210 | ||
211 | return fn; | |
212 | } | |
213 | ||
214 | struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_raw_dirent *rd, const unsigned char *name, uint32_t namelen, uint32_t flash_ofs, int alloc_mode) | |
215 | { | |
216 | struct jffs2_raw_node_ref *raw; | |
217 | struct jffs2_full_dirent *fd; | |
218 | size_t retlen; | |
219 | struct kvec vecs[2]; | |
220 | int retried = 0; | |
221 | int ret; | |
222 | ||
182ec4ee | 223 | D1(printk(KERN_DEBUG "jffs2_write_dirent(ino #%u, name at *0x%p \"%s\"->ino #%u, name_crc 0x%08x)\n", |
1da177e4 LT |
224 | je32_to_cpu(rd->pino), name, name, je32_to_cpu(rd->ino), |
225 | je32_to_cpu(rd->name_crc))); | |
730554d9 | 226 | |
1da177e4 LT |
227 | D1(if(je32_to_cpu(rd->hdr_crc) != crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)) { |
228 | printk(KERN_CRIT "Eep. CRC not correct in jffs2_write_dirent()\n"); | |
229 | BUG(); | |
230 | } | |
231 | ); | |
232 | ||
233 | vecs[0].iov_base = rd; | |
234 | vecs[0].iov_len = sizeof(*rd); | |
235 | vecs[1].iov_base = (unsigned char *)name; | |
236 | vecs[1].iov_len = namelen; | |
182ec4ee | 237 | |
e0c8e42f AB |
238 | jffs2_dbg_prewrite_paranoia_check(c, flash_ofs, vecs[0].iov_len + vecs[1].iov_len); |
239 | ||
1da177e4 LT |
240 | raw = jffs2_alloc_raw_node_ref(); |
241 | ||
242 | if (!raw) | |
243 | return ERR_PTR(-ENOMEM); | |
244 | ||
245 | fd = jffs2_alloc_full_dirent(namelen+1); | |
246 | if (!fd) { | |
247 | jffs2_free_raw_node_ref(raw); | |
248 | return ERR_PTR(-ENOMEM); | |
249 | } | |
250 | ||
251 | fd->version = je32_to_cpu(rd->version); | |
252 | fd->ino = je32_to_cpu(rd->ino); | |
253 | fd->nhash = full_name_hash(name, strlen(name)); | |
254 | fd->type = rd->type; | |
255 | memcpy(fd->name, name, namelen); | |
256 | fd->name[namelen]=0; | |
257 | ||
258 | retry: | |
259 | fd->raw = raw; | |
260 | ||
261 | raw->flash_offset = flash_ofs; | |
262 | raw->__totlen = PAD(sizeof(*rd)+namelen); | |
263 | raw->next_phys = NULL; | |
264 | ||
9b88f473 EH |
265 | if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(rd->version) < f->highest_version)) { |
266 | BUG_ON(!retried); | |
267 | D1(printk(KERN_DEBUG "jffs2_write_dirent : dirent_version %d, " | |
268 | "highest version %d -> updating dirent\n", | |
269 | je32_to_cpu(rd->version), f->highest_version)); | |
270 | rd->version = cpu_to_je32(++f->highest_version); | |
271 | fd->version = je32_to_cpu(rd->version); | |
272 | rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); | |
e4803c30 EH |
273 | } |
274 | ||
1da177e4 LT |
275 | ret = jffs2_flash_writev(c, vecs, 2, flash_ofs, &retlen, |
276 | (alloc_mode==ALLOC_GC)?0:je32_to_cpu(rd->pino)); | |
277 | if (ret || (retlen != sizeof(*rd) + namelen)) { | |
182ec4ee | 278 | printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", |
1da177e4 LT |
279 | sizeof(*rd)+namelen, flash_ofs, ret, retlen); |
280 | /* Mark the space as dirtied */ | |
281 | if (retlen) { | |
282 | raw->next_in_ino = NULL; | |
283 | raw->flash_offset |= REF_OBSOLETE; | |
284 | jffs2_add_physical_node_ref(c, raw); | |
285 | jffs2_mark_node_obsolete(c, raw); | |
286 | } else { | |
287 | printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", raw->flash_offset); | |
288 | jffs2_free_raw_node_ref(raw); | |
289 | } | |
290 | if (!retried && (raw = jffs2_alloc_raw_node_ref())) { | |
291 | /* Try to reallocate space and retry */ | |
292 | uint32_t dummy; | |
293 | struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; | |
294 | ||
295 | retried = 1; | |
296 | ||
297 | D1(printk(KERN_DEBUG "Retrying failed write.\n")); | |
298 | ||
730554d9 AB |
299 | jffs2_dbg_acct_sanity_check(c,jeb); |
300 | jffs2_dbg_acct_paranoia_check(c, jeb); | |
1da177e4 LT |
301 | |
302 | if (alloc_mode == ALLOC_GC) { | |
e631ddba FH |
303 | ret = jffs2_reserve_space_gc(c, sizeof(*rd) + namelen, &flash_ofs, |
304 | &dummy, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); | |
1da177e4 LT |
305 | } else { |
306 | /* Locking pain */ | |
307 | up(&f->sem); | |
308 | jffs2_complete_reservation(c); | |
182ec4ee | 309 | |
e631ddba FH |
310 | ret = jffs2_reserve_space(c, sizeof(*rd) + namelen, &flash_ofs, |
311 | &dummy, alloc_mode, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); | |
1da177e4 LT |
312 | down(&f->sem); |
313 | } | |
314 | ||
315 | if (!ret) { | |
316 | D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write.\n", flash_ofs)); | |
730554d9 AB |
317 | jffs2_dbg_acct_sanity_check(c,jeb); |
318 | jffs2_dbg_acct_paranoia_check(c, jeb); | |
1da177e4 LT |
319 | goto retry; |
320 | } | |
321 | D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d!\n", ret)); | |
322 | jffs2_free_raw_node_ref(raw); | |
323 | } | |
324 | /* Release the full_dnode which is now useless, and return */ | |
325 | jffs2_free_full_dirent(fd); | |
326 | return ERR_PTR(ret?ret:-EIO); | |
327 | } | |
328 | /* Mark the space used */ | |
329 | raw->flash_offset |= REF_PRISTINE; | |
330 | jffs2_add_physical_node_ref(c, raw); | |
331 | ||
332 | spin_lock(&c->erase_completion_lock); | |
333 | raw->next_in_ino = f->inocache->nodes; | |
334 | f->inocache->nodes = raw; | |
335 | spin_unlock(&c->erase_completion_lock); | |
336 | ||
337 | if (retried) { | |
730554d9 | 338 | jffs2_dbg_acct_sanity_check(c,NULL); |
1da177e4 LT |
339 | } |
340 | ||
341 | return fd; | |
342 | } | |
343 | ||
344 | /* The OS-specific code fills in the metadata in the jffs2_raw_inode for us, so that | |
345 | we don't have to go digging in struct inode or its equivalent. It should set: | |
346 | mode, uid, gid, (starting)isize, atime, ctime, mtime */ | |
347 | int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, | |
182ec4ee | 348 | struct jffs2_raw_inode *ri, unsigned char *buf, |
1da177e4 LT |
349 | uint32_t offset, uint32_t writelen, uint32_t *retlen) |
350 | { | |
351 | int ret = 0; | |
352 | uint32_t writtenlen = 0; | |
353 | ||
354 | D1(printk(KERN_DEBUG "jffs2_write_inode_range(): Ino #%u, ofs 0x%x, len 0x%x\n", | |
355 | f->inocache->ino, offset, writelen)); | |
182ec4ee | 356 | |
1da177e4 LT |
357 | while(writelen) { |
358 | struct jffs2_full_dnode *fn; | |
359 | unsigned char *comprbuf = NULL; | |
360 | uint16_t comprtype = JFFS2_COMPR_NONE; | |
361 | uint32_t phys_ofs, alloclen; | |
362 | uint32_t datalen, cdatalen; | |
363 | int retried = 0; | |
364 | ||
365 | retry: | |
366 | D2(printk(KERN_DEBUG "jffs2_commit_write() loop: 0x%x to write to 0x%x\n", writelen, offset)); | |
367 | ||
e631ddba FH |
368 | ret = jffs2_reserve_space(c, sizeof(*ri) + JFFS2_MIN_DATA_LEN, &phys_ofs, |
369 | &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); | |
1da177e4 LT |
370 | if (ret) { |
371 | D1(printk(KERN_DEBUG "jffs2_reserve_space returned %d\n", ret)); | |
372 | break; | |
373 | } | |
374 | down(&f->sem); | |
375 | datalen = min_t(uint32_t, writelen, PAGE_CACHE_SIZE - (offset & (PAGE_CACHE_SIZE-1))); | |
376 | cdatalen = min_t(uint32_t, alloclen - sizeof(*ri), datalen); | |
377 | ||
378 | comprtype = jffs2_compress(c, f, buf, &comprbuf, &datalen, &cdatalen); | |
379 | ||
380 | ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
381 | ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); | |
382 | ri->totlen = cpu_to_je32(sizeof(*ri) + cdatalen); | |
383 | ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); | |
384 | ||
385 | ri->ino = cpu_to_je32(f->inocache->ino); | |
386 | ri->version = cpu_to_je32(++f->highest_version); | |
387 | ri->isize = cpu_to_je32(max(je32_to_cpu(ri->isize), offset + datalen)); | |
388 | ri->offset = cpu_to_je32(offset); | |
389 | ri->csize = cpu_to_je32(cdatalen); | |
390 | ri->dsize = cpu_to_je32(datalen); | |
391 | ri->compr = comprtype & 0xff; | |
392 | ri->usercompr = (comprtype >> 8 ) & 0xff; | |
393 | ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); | |
394 | ri->data_crc = cpu_to_je32(crc32(0, comprbuf, cdatalen)); | |
395 | ||
396 | fn = jffs2_write_dnode(c, f, ri, comprbuf, cdatalen, phys_ofs, ALLOC_NORETRY); | |
397 | ||
398 | jffs2_free_comprbuf(comprbuf, buf); | |
399 | ||
400 | if (IS_ERR(fn)) { | |
401 | ret = PTR_ERR(fn); | |
402 | up(&f->sem); | |
403 | jffs2_complete_reservation(c); | |
404 | if (!retried) { | |
405 | /* Write error to be retried */ | |
406 | retried = 1; | |
407 | D1(printk(KERN_DEBUG "Retrying node write in jffs2_write_inode_range()\n")); | |
408 | goto retry; | |
409 | } | |
410 | break; | |
411 | } | |
412 | ret = jffs2_add_full_dnode_to_inode(c, f, fn); | |
413 | if (f->metadata) { | |
414 | jffs2_mark_node_obsolete(c, f->metadata->raw); | |
415 | jffs2_free_full_dnode(f->metadata); | |
416 | f->metadata = NULL; | |
417 | } | |
418 | if (ret) { | |
419 | /* Eep */ | |
420 | D1(printk(KERN_DEBUG "Eep. add_full_dnode_to_inode() failed in commit_write, returned %d\n", ret)); | |
421 | jffs2_mark_node_obsolete(c, fn->raw); | |
422 | jffs2_free_full_dnode(fn); | |
423 | ||
424 | up(&f->sem); | |
425 | jffs2_complete_reservation(c); | |
426 | break; | |
427 | } | |
428 | up(&f->sem); | |
429 | jffs2_complete_reservation(c); | |
430 | if (!datalen) { | |
431 | printk(KERN_WARNING "Eep. We didn't actually write any data in jffs2_write_inode_range()\n"); | |
432 | ret = -EIO; | |
433 | break; | |
434 | } | |
435 | D1(printk(KERN_DEBUG "increasing writtenlen by %d\n", datalen)); | |
436 | writtenlen += datalen; | |
437 | offset += datalen; | |
438 | writelen -= datalen; | |
439 | buf += datalen; | |
440 | } | |
441 | *retlen = writtenlen; | |
442 | return ret; | |
443 | } | |
444 | ||
445 | 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) | |
446 | { | |
447 | struct jffs2_raw_dirent *rd; | |
448 | struct jffs2_full_dnode *fn; | |
449 | struct jffs2_full_dirent *fd; | |
450 | uint32_t alloclen, phys_ofs; | |
451 | int ret; | |
452 | ||
182ec4ee TG |
453 | /* Try to reserve enough space for both node and dirent. |
454 | * Just the node will do for now, though | |
1da177e4 | 455 | */ |
e631ddba FH |
456 | ret = jffs2_reserve_space(c, sizeof(*ri), &phys_ofs, &alloclen, ALLOC_NORMAL, |
457 | JFFS2_SUMMARY_INODE_SIZE); | |
1da177e4 LT |
458 | D1(printk(KERN_DEBUG "jffs2_do_create(): reserved 0x%x bytes\n", alloclen)); |
459 | if (ret) { | |
460 | up(&f->sem); | |
461 | return ret; | |
462 | } | |
463 | ||
464 | ri->data_crc = cpu_to_je32(0); | |
465 | ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); | |
466 | ||
467 | fn = jffs2_write_dnode(c, f, ri, NULL, 0, phys_ofs, ALLOC_NORMAL); | |
468 | ||
469 | D1(printk(KERN_DEBUG "jffs2_do_create created file with mode 0x%x\n", | |
470 | jemode_to_cpu(ri->mode))); | |
471 | ||
472 | if (IS_ERR(fn)) { | |
473 | D1(printk(KERN_DEBUG "jffs2_write_dnode() failed\n")); | |
474 | /* Eeek. Wave bye bye */ | |
475 | up(&f->sem); | |
476 | jffs2_complete_reservation(c); | |
477 | return PTR_ERR(fn); | |
478 | } | |
182ec4ee | 479 | /* No data here. Only a metadata node, which will be |
1da177e4 LT |
480 | obsoleted by the first data write |
481 | */ | |
482 | f->metadata = fn; | |
483 | ||
484 | up(&f->sem); | |
485 | jffs2_complete_reservation(c); | |
e631ddba FH |
486 | ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, |
487 | ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); | |
182ec4ee | 488 | |
1da177e4 LT |
489 | if (ret) { |
490 | /* Eep. */ | |
491 | D1(printk(KERN_DEBUG "jffs2_reserve_space() for dirent failed\n")); | |
492 | return ret; | |
493 | } | |
494 | ||
495 | rd = jffs2_alloc_raw_dirent(); | |
496 | if (!rd) { | |
497 | /* Argh. Now we treat it like a normal delete */ | |
498 | jffs2_complete_reservation(c); | |
499 | return -ENOMEM; | |
500 | } | |
501 | ||
502 | down(&dir_f->sem); | |
503 | ||
504 | rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
505 | rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); | |
506 | rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); | |
507 | rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); | |
508 | ||
509 | rd->pino = cpu_to_je32(dir_f->inocache->ino); | |
510 | rd->version = cpu_to_je32(++dir_f->highest_version); | |
511 | rd->ino = ri->ino; | |
512 | rd->mctime = ri->ctime; | |
513 | rd->nsize = namelen; | |
514 | rd->type = DT_REG; | |
515 | rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); | |
516 | rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); | |
517 | ||
518 | fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, phys_ofs, ALLOC_NORMAL); | |
519 | ||
520 | jffs2_free_raw_dirent(rd); | |
182ec4ee | 521 | |
1da177e4 | 522 | if (IS_ERR(fd)) { |
182ec4ee | 523 | /* dirent failed to write. Delete the inode normally |
1da177e4 LT |
524 | as if it were the final unlink() */ |
525 | jffs2_complete_reservation(c); | |
526 | up(&dir_f->sem); | |
527 | return PTR_ERR(fd); | |
528 | } | |
529 | ||
530 | /* Link the fd into the inode's list, obsoleting an old | |
531 | one if necessary. */ | |
532 | jffs2_add_fd_to_list(c, fd, &dir_f->dents); | |
533 | ||
534 | jffs2_complete_reservation(c); | |
535 | up(&dir_f->sem); | |
536 | ||
537 | return 0; | |
538 | } | |
539 | ||
540 | ||
541 | int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, | |
3a69e0cd AB |
542 | const char *name, int namelen, struct jffs2_inode_info *dead_f, |
543 | uint32_t time) | |
1da177e4 LT |
544 | { |
545 | struct jffs2_raw_dirent *rd; | |
546 | struct jffs2_full_dirent *fd; | |
547 | uint32_t alloclen, phys_ofs; | |
548 | int ret; | |
549 | ||
182ec4ee | 550 | if (1 /* alternative branch needs testing */ || |
1da177e4 LT |
551 | !jffs2_can_mark_obsolete(c)) { |
552 | /* We can't mark stuff obsolete on the medium. We need to write a deletion dirent */ | |
553 | ||
554 | rd = jffs2_alloc_raw_dirent(); | |
555 | if (!rd) | |
556 | return -ENOMEM; | |
557 | ||
e631ddba FH |
558 | ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, |
559 | ALLOC_DELETION, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); | |
1da177e4 LT |
560 | if (ret) { |
561 | jffs2_free_raw_dirent(rd); | |
562 | return ret; | |
563 | } | |
564 | ||
565 | down(&dir_f->sem); | |
566 | ||
567 | /* Build a deletion node */ | |
568 | rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
569 | rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); | |
570 | rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); | |
571 | rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); | |
182ec4ee | 572 | |
1da177e4 LT |
573 | rd->pino = cpu_to_je32(dir_f->inocache->ino); |
574 | rd->version = cpu_to_je32(++dir_f->highest_version); | |
575 | rd->ino = cpu_to_je32(0); | |
3a69e0cd | 576 | rd->mctime = cpu_to_je32(time); |
1da177e4 LT |
577 | rd->nsize = namelen; |
578 | rd->type = DT_UNKNOWN; | |
579 | rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); | |
580 | rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); | |
581 | ||
582 | fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, phys_ofs, ALLOC_DELETION); | |
182ec4ee | 583 | |
1da177e4 LT |
584 | jffs2_free_raw_dirent(rd); |
585 | ||
586 | if (IS_ERR(fd)) { | |
587 | jffs2_complete_reservation(c); | |
588 | up(&dir_f->sem); | |
589 | return PTR_ERR(fd); | |
590 | } | |
591 | ||
592 | /* File it. This will mark the old one obsolete. */ | |
593 | jffs2_add_fd_to_list(c, fd, &dir_f->dents); | |
594 | up(&dir_f->sem); | |
595 | } else { | |
596 | struct jffs2_full_dirent **prev = &dir_f->dents; | |
597 | uint32_t nhash = full_name_hash(name, namelen); | |
598 | ||
599 | down(&dir_f->sem); | |
600 | ||
601 | while ((*prev) && (*prev)->nhash <= nhash) { | |
182ec4ee | 602 | if ((*prev)->nhash == nhash && |
1da177e4 LT |
603 | !memcmp((*prev)->name, name, namelen) && |
604 | !(*prev)->name[namelen]) { | |
605 | struct jffs2_full_dirent *this = *prev; | |
606 | ||
607 | D1(printk(KERN_DEBUG "Marking old dirent node (ino #%u) @%08x obsolete\n", | |
608 | this->ino, ref_offset(this->raw))); | |
609 | ||
610 | *prev = this->next; | |
611 | jffs2_mark_node_obsolete(c, (this->raw)); | |
612 | jffs2_free_full_dirent(this); | |
613 | break; | |
614 | } | |
615 | prev = &((*prev)->next); | |
616 | } | |
617 | up(&dir_f->sem); | |
618 | } | |
619 | ||
620 | /* dead_f is NULL if this was a rename not a real unlink */ | |
621 | /* Also catch the !f->inocache case, where there was a dirent | |
622 | pointing to an inode which didn't exist. */ | |
182ec4ee | 623 | if (dead_f && dead_f->inocache) { |
1da177e4 LT |
624 | |
625 | down(&dead_f->sem); | |
626 | ||
32f1a95d AB |
627 | if (S_ISDIR(OFNI_EDONI_2SFFJ(dead_f)->i_mode)) { |
628 | while (dead_f->dents) { | |
629 | /* There can be only deleted ones */ | |
630 | fd = dead_f->dents; | |
182ec4ee | 631 | |
32f1a95d | 632 | dead_f->dents = fd->next; |
182ec4ee | 633 | |
32f1a95d AB |
634 | if (fd->ino) { |
635 | printk(KERN_WARNING "Deleting inode #%u with active dentry \"%s\"->ino #%u\n", | |
636 | dead_f->inocache->ino, fd->name, fd->ino); | |
637 | } else { | |
638 | D1(printk(KERN_DEBUG "Removing deletion dirent for \"%s\" from dir ino #%u\n", | |
639 | fd->name, dead_f->inocache->ino)); | |
640 | } | |
641 | jffs2_mark_node_obsolete(c, fd->raw); | |
642 | jffs2_free_full_dirent(fd); | |
1da177e4 | 643 | } |
1da177e4 LT |
644 | } |
645 | ||
646 | dead_f->inocache->nlink--; | |
647 | /* NB: Caller must set inode nlink if appropriate */ | |
648 | up(&dead_f->sem); | |
649 | } | |
650 | ||
651 | jffs2_complete_reservation(c); | |
652 | ||
653 | return 0; | |
654 | } | |
655 | ||
656 | ||
3a69e0cd | 657 | 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 |
658 | { |
659 | struct jffs2_raw_dirent *rd; | |
660 | struct jffs2_full_dirent *fd; | |
661 | uint32_t alloclen, phys_ofs; | |
662 | int ret; | |
663 | ||
664 | rd = jffs2_alloc_raw_dirent(); | |
665 | if (!rd) | |
666 | return -ENOMEM; | |
667 | ||
e631ddba FH |
668 | ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, |
669 | ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); | |
1da177e4 LT |
670 | if (ret) { |
671 | jffs2_free_raw_dirent(rd); | |
672 | return ret; | |
673 | } | |
182ec4ee | 674 | |
1da177e4 LT |
675 | down(&dir_f->sem); |
676 | ||
677 | /* Build a deletion node */ | |
678 | rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
679 | rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); | |
680 | rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); | |
681 | rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); | |
682 | ||
683 | rd->pino = cpu_to_je32(dir_f->inocache->ino); | |
684 | rd->version = cpu_to_je32(++dir_f->highest_version); | |
685 | rd->ino = cpu_to_je32(ino); | |
3a69e0cd | 686 | rd->mctime = cpu_to_je32(time); |
1da177e4 LT |
687 | rd->nsize = namelen; |
688 | ||
689 | rd->type = type; | |
690 | ||
691 | rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); | |
692 | rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); | |
693 | ||
694 | fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, phys_ofs, ALLOC_NORMAL); | |
182ec4ee | 695 | |
1da177e4 LT |
696 | jffs2_free_raw_dirent(rd); |
697 | ||
698 | if (IS_ERR(fd)) { | |
699 | jffs2_complete_reservation(c); | |
700 | up(&dir_f->sem); | |
701 | return PTR_ERR(fd); | |
702 | } | |
703 | ||
704 | /* File it. This will mark the old one obsolete. */ | |
705 | jffs2_add_fd_to_list(c, fd, &dir_f->dents); | |
706 | ||
707 | jffs2_complete_reservation(c); | |
708 | up(&dir_f->sem); | |
709 | ||
710 | return 0; | |
711 | } |