Commit | Line | Data |
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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; | |
1da177e4 | 106 | |
9b88f473 EH |
107 | if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(ri->version) < f->highest_version)) { |
108 | BUG_ON(!retried); | |
109 | D1(printk(KERN_DEBUG "jffs2_write_dnode : dnode_version %d, " | |
182ec4ee | 110 | "highest version %d -> updating dnode\n", |
9b88f473 EH |
111 | je32_to_cpu(ri->version), f->highest_version)); |
112 | ri->version = cpu_to_je32(++f->highest_version); | |
113 | ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); | |
e4803c30 EH |
114 | } |
115 | ||
1da177e4 LT |
116 | ret = jffs2_flash_writev(c, vecs, cnt, flash_ofs, &retlen, |
117 | (alloc_mode==ALLOC_GC)?0:f->inocache->ino); | |
118 | ||
119 | if (ret || (retlen != sizeof(*ri) + datalen)) { | |
182ec4ee | 120 | printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", |
1da177e4 LT |
121 | sizeof(*ri)+datalen, flash_ofs, ret, retlen); |
122 | ||
123 | /* Mark the space as dirtied */ | |
124 | if (retlen) { | |
182ec4ee | 125 | /* Don't change raw->size to match retlen. We may have |
1da177e4 LT |
126 | written the node header already, and only the data will |
127 | seem corrupted, in which case the scan would skip over | |
182ec4ee | 128 | any node we write before the original intended end of |
1da177e4 LT |
129 | this node */ |
130 | raw->flash_offset |= REF_OBSOLETE; | |
fcb75787 | 131 | jffs2_add_physical_node_ref(c, raw, PAD(sizeof(*ri)+datalen), NULL); |
1da177e4 LT |
132 | jffs2_mark_node_obsolete(c, raw); |
133 | } else { | |
134 | printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", raw->flash_offset); | |
135 | jffs2_free_raw_node_ref(raw); | |
136 | } | |
137 | if (!retried && alloc_mode != ALLOC_NORETRY && (raw = jffs2_alloc_raw_node_ref())) { | |
138 | /* Try to reallocate space and retry */ | |
139 | uint32_t dummy; | |
140 | struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; | |
141 | ||
142 | retried = 1; | |
143 | ||
144 | D1(printk(KERN_DEBUG "Retrying failed write.\n")); | |
182ec4ee | 145 | |
730554d9 AB |
146 | jffs2_dbg_acct_sanity_check(c,jeb); |
147 | jffs2_dbg_acct_paranoia_check(c, jeb); | |
1da177e4 LT |
148 | |
149 | if (alloc_mode == ALLOC_GC) { | |
e631ddba FH |
150 | ret = jffs2_reserve_space_gc(c, sizeof(*ri) + datalen, &flash_ofs, |
151 | &dummy, JFFS2_SUMMARY_INODE_SIZE); | |
1da177e4 LT |
152 | } else { |
153 | /* Locking pain */ | |
154 | up(&f->sem); | |
155 | jffs2_complete_reservation(c); | |
182ec4ee | 156 | |
e631ddba FH |
157 | ret = jffs2_reserve_space(c, sizeof(*ri) + datalen, &flash_ofs, |
158 | &dummy, alloc_mode, JFFS2_SUMMARY_INODE_SIZE); | |
1da177e4 LT |
159 | down(&f->sem); |
160 | } | |
161 | ||
162 | if (!ret) { | |
163 | D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write.\n", flash_ofs)); | |
164 | ||
730554d9 AB |
165 | jffs2_dbg_acct_sanity_check(c,jeb); |
166 | jffs2_dbg_acct_paranoia_check(c, jeb); | |
1da177e4 LT |
167 | |
168 | goto retry; | |
169 | } | |
170 | D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d!\n", ret)); | |
171 | jffs2_free_raw_node_ref(raw); | |
172 | } | |
173 | /* Release the full_dnode which is now useless, and return */ | |
174 | jffs2_free_full_dnode(fn); | |
175 | return ERR_PTR(ret?ret:-EIO); | |
176 | } | |
177 | /* Mark the space used */ | |
182ec4ee TG |
178 | /* If node covers at least a whole page, or if it starts at the |
179 | beginning of a page and runs to the end of the file, or if | |
180 | it's a hole node, mark it REF_PRISTINE, else REF_NORMAL. | |
1da177e4 LT |
181 | */ |
182 | if ((je32_to_cpu(ri->dsize) >= PAGE_CACHE_SIZE) || | |
183 | ( ((je32_to_cpu(ri->offset)&(PAGE_CACHE_SIZE-1))==0) && | |
184 | (je32_to_cpu(ri->dsize)+je32_to_cpu(ri->offset) == je32_to_cpu(ri->isize)))) { | |
185 | raw->flash_offset |= REF_PRISTINE; | |
186 | } else { | |
187 | raw->flash_offset |= REF_NORMAL; | |
188 | } | |
fcb75787 | 189 | jffs2_add_physical_node_ref(c, raw, PAD(sizeof(*ri)+datalen), f->inocache); |
1da177e4 LT |
190 | |
191 | 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 | 192 | flash_ofs, ref_flags(raw), je32_to_cpu(ri->dsize), |
1da177e4 LT |
193 | je32_to_cpu(ri->csize), je32_to_cpu(ri->node_crc), |
194 | je32_to_cpu(ri->data_crc), je32_to_cpu(ri->totlen))); | |
195 | ||
196 | if (retried) { | |
730554d9 | 197 | jffs2_dbg_acct_sanity_check(c,NULL); |
1da177e4 LT |
198 | } |
199 | ||
200 | return fn; | |
201 | } | |
202 | ||
203 | 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) | |
204 | { | |
205 | struct jffs2_raw_node_ref *raw; | |
206 | struct jffs2_full_dirent *fd; | |
207 | size_t retlen; | |
208 | struct kvec vecs[2]; | |
209 | int retried = 0; | |
210 | int ret; | |
211 | ||
182ec4ee | 212 | D1(printk(KERN_DEBUG "jffs2_write_dirent(ino #%u, name at *0x%p \"%s\"->ino #%u, name_crc 0x%08x)\n", |
1da177e4 LT |
213 | je32_to_cpu(rd->pino), name, name, je32_to_cpu(rd->ino), |
214 | je32_to_cpu(rd->name_crc))); | |
730554d9 | 215 | |
1da177e4 LT |
216 | D1(if(je32_to_cpu(rd->hdr_crc) != crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)) { |
217 | printk(KERN_CRIT "Eep. CRC not correct in jffs2_write_dirent()\n"); | |
218 | BUG(); | |
219 | } | |
220 | ); | |
221 | ||
222 | vecs[0].iov_base = rd; | |
223 | vecs[0].iov_len = sizeof(*rd); | |
224 | vecs[1].iov_base = (unsigned char *)name; | |
225 | vecs[1].iov_len = namelen; | |
182ec4ee | 226 | |
e0c8e42f AB |
227 | jffs2_dbg_prewrite_paranoia_check(c, flash_ofs, vecs[0].iov_len + vecs[1].iov_len); |
228 | ||
1da177e4 LT |
229 | raw = jffs2_alloc_raw_node_ref(); |
230 | ||
231 | if (!raw) | |
232 | return ERR_PTR(-ENOMEM); | |
233 | ||
234 | fd = jffs2_alloc_full_dirent(namelen+1); | |
235 | if (!fd) { | |
236 | jffs2_free_raw_node_ref(raw); | |
237 | return ERR_PTR(-ENOMEM); | |
238 | } | |
239 | ||
240 | fd->version = je32_to_cpu(rd->version); | |
241 | fd->ino = je32_to_cpu(rd->ino); | |
242 | fd->nhash = full_name_hash(name, strlen(name)); | |
243 | fd->type = rd->type; | |
244 | memcpy(fd->name, name, namelen); | |
245 | fd->name[namelen]=0; | |
246 | ||
247 | retry: | |
248 | fd->raw = raw; | |
249 | ||
250 | raw->flash_offset = flash_ofs; | |
1da177e4 | 251 | |
9b88f473 EH |
252 | if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(rd->version) < f->highest_version)) { |
253 | BUG_ON(!retried); | |
254 | D1(printk(KERN_DEBUG "jffs2_write_dirent : dirent_version %d, " | |
255 | "highest version %d -> updating dirent\n", | |
256 | je32_to_cpu(rd->version), f->highest_version)); | |
257 | rd->version = cpu_to_je32(++f->highest_version); | |
258 | fd->version = je32_to_cpu(rd->version); | |
259 | rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); | |
e4803c30 EH |
260 | } |
261 | ||
1da177e4 LT |
262 | ret = jffs2_flash_writev(c, vecs, 2, flash_ofs, &retlen, |
263 | (alloc_mode==ALLOC_GC)?0:je32_to_cpu(rd->pino)); | |
264 | if (ret || (retlen != sizeof(*rd) + namelen)) { | |
182ec4ee | 265 | printk(KERN_NOTICE "Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", |
1da177e4 LT |
266 | sizeof(*rd)+namelen, flash_ofs, ret, retlen); |
267 | /* Mark the space as dirtied */ | |
268 | if (retlen) { | |
1da177e4 | 269 | raw->flash_offset |= REF_OBSOLETE; |
fcb75787 | 270 | jffs2_add_physical_node_ref(c, raw, PAD(sizeof(*rd)+namelen), NULL); |
1da177e4 LT |
271 | jffs2_mark_node_obsolete(c, raw); |
272 | } else { | |
273 | printk(KERN_NOTICE "Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n", raw->flash_offset); | |
274 | jffs2_free_raw_node_ref(raw); | |
275 | } | |
276 | if (!retried && (raw = jffs2_alloc_raw_node_ref())) { | |
277 | /* Try to reallocate space and retry */ | |
278 | uint32_t dummy; | |
279 | struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size]; | |
280 | ||
281 | retried = 1; | |
282 | ||
283 | D1(printk(KERN_DEBUG "Retrying failed write.\n")); | |
284 | ||
730554d9 AB |
285 | jffs2_dbg_acct_sanity_check(c,jeb); |
286 | jffs2_dbg_acct_paranoia_check(c, jeb); | |
1da177e4 LT |
287 | |
288 | if (alloc_mode == ALLOC_GC) { | |
e631ddba FH |
289 | ret = jffs2_reserve_space_gc(c, sizeof(*rd) + namelen, &flash_ofs, |
290 | &dummy, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); | |
1da177e4 LT |
291 | } else { |
292 | /* Locking pain */ | |
293 | up(&f->sem); | |
294 | jffs2_complete_reservation(c); | |
182ec4ee | 295 | |
e631ddba FH |
296 | ret = jffs2_reserve_space(c, sizeof(*rd) + namelen, &flash_ofs, |
297 | &dummy, alloc_mode, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); | |
1da177e4 LT |
298 | down(&f->sem); |
299 | } | |
300 | ||
301 | if (!ret) { | |
302 | D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed write.\n", flash_ofs)); | |
730554d9 AB |
303 | jffs2_dbg_acct_sanity_check(c,jeb); |
304 | jffs2_dbg_acct_paranoia_check(c, jeb); | |
1da177e4 LT |
305 | goto retry; |
306 | } | |
307 | D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: %d!\n", ret)); | |
308 | jffs2_free_raw_node_ref(raw); | |
309 | } | |
310 | /* Release the full_dnode which is now useless, and return */ | |
311 | jffs2_free_full_dirent(fd); | |
312 | return ERR_PTR(ret?ret:-EIO); | |
313 | } | |
314 | /* Mark the space used */ | |
315 | raw->flash_offset |= REF_PRISTINE; | |
fcb75787 | 316 | jffs2_add_physical_node_ref(c, raw, PAD(sizeof(*rd)+namelen), f->inocache); |
1da177e4 LT |
317 | |
318 | if (retried) { | |
730554d9 | 319 | jffs2_dbg_acct_sanity_check(c,NULL); |
1da177e4 LT |
320 | } |
321 | ||
322 | return fd; | |
323 | } | |
324 | ||
325 | /* The OS-specific code fills in the metadata in the jffs2_raw_inode for us, so that | |
326 | we don't have to go digging in struct inode or its equivalent. It should set: | |
327 | mode, uid, gid, (starting)isize, atime, ctime, mtime */ | |
328 | int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, | |
182ec4ee | 329 | struct jffs2_raw_inode *ri, unsigned char *buf, |
1da177e4 LT |
330 | uint32_t offset, uint32_t writelen, uint32_t *retlen) |
331 | { | |
332 | int ret = 0; | |
333 | uint32_t writtenlen = 0; | |
334 | ||
335 | D1(printk(KERN_DEBUG "jffs2_write_inode_range(): Ino #%u, ofs 0x%x, len 0x%x\n", | |
336 | f->inocache->ino, offset, writelen)); | |
182ec4ee | 337 | |
1da177e4 LT |
338 | while(writelen) { |
339 | struct jffs2_full_dnode *fn; | |
340 | unsigned char *comprbuf = NULL; | |
341 | uint16_t comprtype = JFFS2_COMPR_NONE; | |
342 | uint32_t phys_ofs, alloclen; | |
343 | uint32_t datalen, cdatalen; | |
344 | int retried = 0; | |
345 | ||
346 | retry: | |
347 | D2(printk(KERN_DEBUG "jffs2_commit_write() loop: 0x%x to write to 0x%x\n", writelen, offset)); | |
348 | ||
e631ddba FH |
349 | ret = jffs2_reserve_space(c, sizeof(*ri) + JFFS2_MIN_DATA_LEN, &phys_ofs, |
350 | &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); | |
1da177e4 LT |
351 | if (ret) { |
352 | D1(printk(KERN_DEBUG "jffs2_reserve_space returned %d\n", ret)); | |
353 | break; | |
354 | } | |
355 | down(&f->sem); | |
356 | datalen = min_t(uint32_t, writelen, PAGE_CACHE_SIZE - (offset & (PAGE_CACHE_SIZE-1))); | |
357 | cdatalen = min_t(uint32_t, alloclen - sizeof(*ri), datalen); | |
358 | ||
359 | comprtype = jffs2_compress(c, f, buf, &comprbuf, &datalen, &cdatalen); | |
360 | ||
361 | ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
362 | ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); | |
363 | ri->totlen = cpu_to_je32(sizeof(*ri) + cdatalen); | |
364 | ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); | |
365 | ||
366 | ri->ino = cpu_to_je32(f->inocache->ino); | |
367 | ri->version = cpu_to_je32(++f->highest_version); | |
368 | ri->isize = cpu_to_je32(max(je32_to_cpu(ri->isize), offset + datalen)); | |
369 | ri->offset = cpu_to_je32(offset); | |
370 | ri->csize = cpu_to_je32(cdatalen); | |
371 | ri->dsize = cpu_to_je32(datalen); | |
372 | ri->compr = comprtype & 0xff; | |
373 | ri->usercompr = (comprtype >> 8 ) & 0xff; | |
374 | ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); | |
375 | ri->data_crc = cpu_to_je32(crc32(0, comprbuf, cdatalen)); | |
376 | ||
377 | fn = jffs2_write_dnode(c, f, ri, comprbuf, cdatalen, phys_ofs, ALLOC_NORETRY); | |
378 | ||
379 | jffs2_free_comprbuf(comprbuf, buf); | |
380 | ||
381 | if (IS_ERR(fn)) { | |
382 | ret = PTR_ERR(fn); | |
383 | up(&f->sem); | |
384 | jffs2_complete_reservation(c); | |
385 | if (!retried) { | |
386 | /* Write error to be retried */ | |
387 | retried = 1; | |
388 | D1(printk(KERN_DEBUG "Retrying node write in jffs2_write_inode_range()\n")); | |
389 | goto retry; | |
390 | } | |
391 | break; | |
392 | } | |
393 | ret = jffs2_add_full_dnode_to_inode(c, f, fn); | |
394 | if (f->metadata) { | |
395 | jffs2_mark_node_obsolete(c, f->metadata->raw); | |
396 | jffs2_free_full_dnode(f->metadata); | |
397 | f->metadata = NULL; | |
398 | } | |
399 | if (ret) { | |
400 | /* Eep */ | |
401 | D1(printk(KERN_DEBUG "Eep. add_full_dnode_to_inode() failed in commit_write, returned %d\n", ret)); | |
402 | jffs2_mark_node_obsolete(c, fn->raw); | |
403 | jffs2_free_full_dnode(fn); | |
404 | ||
405 | up(&f->sem); | |
406 | jffs2_complete_reservation(c); | |
407 | break; | |
408 | } | |
409 | up(&f->sem); | |
410 | jffs2_complete_reservation(c); | |
411 | if (!datalen) { | |
412 | printk(KERN_WARNING "Eep. We didn't actually write any data in jffs2_write_inode_range()\n"); | |
413 | ret = -EIO; | |
414 | break; | |
415 | } | |
416 | D1(printk(KERN_DEBUG "increasing writtenlen by %d\n", datalen)); | |
417 | writtenlen += datalen; | |
418 | offset += datalen; | |
419 | writelen -= datalen; | |
420 | buf += datalen; | |
421 | } | |
422 | *retlen = writtenlen; | |
423 | return ret; | |
424 | } | |
425 | ||
426 | 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) | |
427 | { | |
428 | struct jffs2_raw_dirent *rd; | |
429 | struct jffs2_full_dnode *fn; | |
430 | struct jffs2_full_dirent *fd; | |
431 | uint32_t alloclen, phys_ofs; | |
432 | int ret; | |
433 | ||
182ec4ee TG |
434 | /* Try to reserve enough space for both node and dirent. |
435 | * Just the node will do for now, though | |
1da177e4 | 436 | */ |
e631ddba FH |
437 | ret = jffs2_reserve_space(c, sizeof(*ri), &phys_ofs, &alloclen, ALLOC_NORMAL, |
438 | JFFS2_SUMMARY_INODE_SIZE); | |
1da177e4 LT |
439 | D1(printk(KERN_DEBUG "jffs2_do_create(): reserved 0x%x bytes\n", alloclen)); |
440 | if (ret) { | |
441 | up(&f->sem); | |
442 | return ret; | |
443 | } | |
444 | ||
445 | ri->data_crc = cpu_to_je32(0); | |
446 | ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); | |
447 | ||
448 | fn = jffs2_write_dnode(c, f, ri, NULL, 0, phys_ofs, ALLOC_NORMAL); | |
449 | ||
450 | D1(printk(KERN_DEBUG "jffs2_do_create created file with mode 0x%x\n", | |
451 | jemode_to_cpu(ri->mode))); | |
452 | ||
453 | if (IS_ERR(fn)) { | |
454 | D1(printk(KERN_DEBUG "jffs2_write_dnode() failed\n")); | |
455 | /* Eeek. Wave bye bye */ | |
456 | up(&f->sem); | |
457 | jffs2_complete_reservation(c); | |
458 | return PTR_ERR(fn); | |
459 | } | |
182ec4ee | 460 | /* No data here. Only a metadata node, which will be |
1da177e4 LT |
461 | obsoleted by the first data write |
462 | */ | |
463 | f->metadata = fn; | |
464 | ||
465 | up(&f->sem); | |
466 | jffs2_complete_reservation(c); | |
e631ddba FH |
467 | ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, |
468 | ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); | |
182ec4ee | 469 | |
1da177e4 LT |
470 | if (ret) { |
471 | /* Eep. */ | |
472 | D1(printk(KERN_DEBUG "jffs2_reserve_space() for dirent failed\n")); | |
473 | return ret; | |
474 | } | |
475 | ||
476 | rd = jffs2_alloc_raw_dirent(); | |
477 | if (!rd) { | |
478 | /* Argh. Now we treat it like a normal delete */ | |
479 | jffs2_complete_reservation(c); | |
480 | return -ENOMEM; | |
481 | } | |
482 | ||
483 | down(&dir_f->sem); | |
484 | ||
485 | rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
486 | rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); | |
487 | rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); | |
488 | rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); | |
489 | ||
490 | rd->pino = cpu_to_je32(dir_f->inocache->ino); | |
491 | rd->version = cpu_to_je32(++dir_f->highest_version); | |
492 | rd->ino = ri->ino; | |
493 | rd->mctime = ri->ctime; | |
494 | rd->nsize = namelen; | |
495 | rd->type = DT_REG; | |
496 | rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); | |
497 | rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); | |
498 | ||
499 | fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, phys_ofs, ALLOC_NORMAL); | |
500 | ||
501 | jffs2_free_raw_dirent(rd); | |
182ec4ee | 502 | |
1da177e4 | 503 | if (IS_ERR(fd)) { |
182ec4ee | 504 | /* dirent failed to write. Delete the inode normally |
1da177e4 LT |
505 | as if it were the final unlink() */ |
506 | jffs2_complete_reservation(c); | |
507 | up(&dir_f->sem); | |
508 | return PTR_ERR(fd); | |
509 | } | |
510 | ||
511 | /* Link the fd into the inode's list, obsoleting an old | |
512 | one if necessary. */ | |
513 | jffs2_add_fd_to_list(c, fd, &dir_f->dents); | |
514 | ||
515 | jffs2_complete_reservation(c); | |
516 | up(&dir_f->sem); | |
517 | ||
518 | return 0; | |
519 | } | |
520 | ||
521 | ||
522 | int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, | |
3a69e0cd AB |
523 | const char *name, int namelen, struct jffs2_inode_info *dead_f, |
524 | uint32_t time) | |
1da177e4 LT |
525 | { |
526 | struct jffs2_raw_dirent *rd; | |
527 | struct jffs2_full_dirent *fd; | |
528 | uint32_t alloclen, phys_ofs; | |
529 | int ret; | |
530 | ||
182ec4ee | 531 | if (1 /* alternative branch needs testing */ || |
1da177e4 LT |
532 | !jffs2_can_mark_obsolete(c)) { |
533 | /* We can't mark stuff obsolete on the medium. We need to write a deletion dirent */ | |
534 | ||
535 | rd = jffs2_alloc_raw_dirent(); | |
536 | if (!rd) | |
537 | return -ENOMEM; | |
538 | ||
e631ddba FH |
539 | ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, |
540 | ALLOC_DELETION, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); | |
1da177e4 LT |
541 | if (ret) { |
542 | jffs2_free_raw_dirent(rd); | |
543 | return ret; | |
544 | } | |
545 | ||
546 | down(&dir_f->sem); | |
547 | ||
548 | /* Build a deletion node */ | |
549 | rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
550 | rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); | |
551 | rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); | |
552 | rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); | |
182ec4ee | 553 | |
1da177e4 LT |
554 | rd->pino = cpu_to_je32(dir_f->inocache->ino); |
555 | rd->version = cpu_to_je32(++dir_f->highest_version); | |
556 | rd->ino = cpu_to_je32(0); | |
3a69e0cd | 557 | rd->mctime = cpu_to_je32(time); |
1da177e4 LT |
558 | rd->nsize = namelen; |
559 | rd->type = DT_UNKNOWN; | |
560 | rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); | |
561 | rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); | |
562 | ||
563 | fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, phys_ofs, ALLOC_DELETION); | |
182ec4ee | 564 | |
1da177e4 LT |
565 | jffs2_free_raw_dirent(rd); |
566 | ||
567 | if (IS_ERR(fd)) { | |
568 | jffs2_complete_reservation(c); | |
569 | up(&dir_f->sem); | |
570 | return PTR_ERR(fd); | |
571 | } | |
572 | ||
573 | /* File it. This will mark the old one obsolete. */ | |
574 | jffs2_add_fd_to_list(c, fd, &dir_f->dents); | |
575 | up(&dir_f->sem); | |
576 | } else { | |
577 | struct jffs2_full_dirent **prev = &dir_f->dents; | |
578 | uint32_t nhash = full_name_hash(name, namelen); | |
579 | ||
580 | down(&dir_f->sem); | |
581 | ||
582 | while ((*prev) && (*prev)->nhash <= nhash) { | |
182ec4ee | 583 | if ((*prev)->nhash == nhash && |
1da177e4 LT |
584 | !memcmp((*prev)->name, name, namelen) && |
585 | !(*prev)->name[namelen]) { | |
586 | struct jffs2_full_dirent *this = *prev; | |
587 | ||
588 | D1(printk(KERN_DEBUG "Marking old dirent node (ino #%u) @%08x obsolete\n", | |
589 | this->ino, ref_offset(this->raw))); | |
590 | ||
591 | *prev = this->next; | |
592 | jffs2_mark_node_obsolete(c, (this->raw)); | |
593 | jffs2_free_full_dirent(this); | |
594 | break; | |
595 | } | |
596 | prev = &((*prev)->next); | |
597 | } | |
598 | up(&dir_f->sem); | |
599 | } | |
600 | ||
601 | /* dead_f is NULL if this was a rename not a real unlink */ | |
602 | /* Also catch the !f->inocache case, where there was a dirent | |
603 | pointing to an inode which didn't exist. */ | |
182ec4ee | 604 | if (dead_f && dead_f->inocache) { |
1da177e4 LT |
605 | |
606 | down(&dead_f->sem); | |
607 | ||
32f1a95d AB |
608 | if (S_ISDIR(OFNI_EDONI_2SFFJ(dead_f)->i_mode)) { |
609 | while (dead_f->dents) { | |
610 | /* There can be only deleted ones */ | |
611 | fd = dead_f->dents; | |
182ec4ee | 612 | |
32f1a95d | 613 | dead_f->dents = fd->next; |
182ec4ee | 614 | |
32f1a95d AB |
615 | if (fd->ino) { |
616 | printk(KERN_WARNING "Deleting inode #%u with active dentry \"%s\"->ino #%u\n", | |
617 | dead_f->inocache->ino, fd->name, fd->ino); | |
618 | } else { | |
619 | D1(printk(KERN_DEBUG "Removing deletion dirent for \"%s\" from dir ino #%u\n", | |
620 | fd->name, dead_f->inocache->ino)); | |
621 | } | |
622 | jffs2_mark_node_obsolete(c, fd->raw); | |
623 | jffs2_free_full_dirent(fd); | |
1da177e4 | 624 | } |
1da177e4 LT |
625 | } |
626 | ||
627 | dead_f->inocache->nlink--; | |
628 | /* NB: Caller must set inode nlink if appropriate */ | |
629 | up(&dead_f->sem); | |
630 | } | |
631 | ||
632 | jffs2_complete_reservation(c); | |
633 | ||
634 | return 0; | |
635 | } | |
636 | ||
637 | ||
3a69e0cd | 638 | 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 |
639 | { |
640 | struct jffs2_raw_dirent *rd; | |
641 | struct jffs2_full_dirent *fd; | |
642 | uint32_t alloclen, phys_ofs; | |
643 | int ret; | |
644 | ||
645 | rd = jffs2_alloc_raw_dirent(); | |
646 | if (!rd) | |
647 | return -ENOMEM; | |
648 | ||
e631ddba FH |
649 | ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, |
650 | ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); | |
1da177e4 LT |
651 | if (ret) { |
652 | jffs2_free_raw_dirent(rd); | |
653 | return ret; | |
654 | } | |
182ec4ee | 655 | |
1da177e4 LT |
656 | down(&dir_f->sem); |
657 | ||
658 | /* Build a deletion node */ | |
659 | rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
660 | rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); | |
661 | rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); | |
662 | rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); | |
663 | ||
664 | rd->pino = cpu_to_je32(dir_f->inocache->ino); | |
665 | rd->version = cpu_to_je32(++dir_f->highest_version); | |
666 | rd->ino = cpu_to_je32(ino); | |
3a69e0cd | 667 | rd->mctime = cpu_to_je32(time); |
1da177e4 LT |
668 | rd->nsize = namelen; |
669 | ||
670 | rd->type = type; | |
671 | ||
672 | rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); | |
673 | rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); | |
674 | ||
675 | fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, phys_ofs, ALLOC_NORMAL); | |
182ec4ee | 676 | |
1da177e4 LT |
677 | jffs2_free_raw_dirent(rd); |
678 | ||
679 | if (IS_ERR(fd)) { | |
680 | jffs2_complete_reservation(c); | |
681 | up(&dir_f->sem); | |
682 | return PTR_ERR(fd); | |
683 | } | |
684 | ||
685 | /* File it. This will mark the old one obsolete. */ | |
686 | jffs2_add_fd_to_list(c, fd, &dir_f->dents); | |
687 | ||
688 | jffs2_complete_reservation(c); | |
689 | up(&dir_f->sem); | |
690 | ||
691 | return 0; | |
692 | } |