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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * JFFS2 -- Journalling Flash File System, Version 2.
3 *
David Woodhousec00c3102007-04-25 14:16:47 +01004 * Copyright © 2001-2007 Red Hat, Inc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 *
6 * Created by David Woodhouse <dwmw2@infradead.org>
7 *
8 * For licensing information, see the file 'LICENCE' in this directory.
9 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 */
11
Joe Perches5a528952012-02-15 15:56:45 -080012#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/kernel.h>
15#include <linux/fs.h>
16#include <linux/crc32.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/pagemap.h>
18#include <linux/mtd/mtd.h>
19#include "nodelist.h"
20#include "compr.h"
21
22
David Woodhouse27c72b02008-05-01 18:47:17 +010023int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
24 uint32_t mode, struct jffs2_raw_inode *ri)
Linus Torvalds1da177e2005-04-16 15:20:36 -070025{
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;
David Woodhouse27c72b02008-05-01 18:47:17 +010036 f->inocache->pino_nlink = 1; /* Will be overwritten shortly for directories */
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 f->inocache->nodes = (struct jffs2_raw_node_ref *)f->inocache;
Linus Torvalds1da177e2005-04-16 15:20:36 -070038 f->inocache->state = INO_STATE_PRESENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -070039
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 jffs2_add_ino_cache(c, f->inocache);
Joe Perches9c261b32012-02-15 15:56:43 -080041 jffs2_dbg(1, "%s(): Assigned ino# %d\n", __func__, f->inocache->ino);
David Woodhouse7d200962005-04-13 14:22:38 +010042 ri->ino = cpu_to_je32(f->inocache->ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
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
Thomas Gleixner182ec4e2005-11-07 11:16:07 +000056/* jffs2_write_dnode - given a raw_inode, allocate a full_dnode for it,
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 write it to the flash, link it into the existing inode/fragment list */
58
David Woodhouse9fe48542006-05-23 00:38:06 +010059struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
60 struct jffs2_raw_inode *ri, const unsigned char *data,
61 uint32_t datalen, int alloc_mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
63{
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 struct jffs2_full_dnode *fn;
65 size_t retlen;
David Woodhouse9fe48542006-05-23 00:38:06 +010066 uint32_t flash_ofs;
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 struct kvec vecs[2];
68 int ret;
69 int retried = 0;
70 unsigned long cnt = 2;
71
72 D1(if(je32_to_cpu(ri->hdr_crc) != crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)) {
Joe Perchesda320f02012-02-15 15:56:44 -080073 pr_crit("Eep. CRC not correct in jffs2_write_dnode()\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 BUG();
75 }
76 );
77 vecs[0].iov_base = ri;
78 vecs[0].iov_len = sizeof(*ri);
79 vecs[1].iov_base = (unsigned char *)data;
80 vecs[1].iov_len = datalen;
81
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 if (je32_to_cpu(ri->totlen) != sizeof(*ri) + datalen) {
Joe Perchesda320f02012-02-15 15:56:44 -080083 pr_warn("%s(): ri->totlen (0x%08x) != sizeof(*ri) (0x%08zx) + datalen (0x%08x)\n",
84 __func__, je32_to_cpu(ri->totlen),
85 sizeof(*ri), datalen);
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 }
Thomas Gleixner182ec4e2005-11-07 11:16:07 +000087
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 fn = jffs2_alloc_full_dnode();
David Woodhouse2f785402006-05-24 02:04:45 +010089 if (!fn)
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 return ERR_PTR(-ENOMEM);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
92 /* check number of valid vecs */
93 if (!datalen || !data)
94 cnt = 1;
95 retry:
David Woodhouse2f785402006-05-24 02:04:45 +010096 flash_ofs = write_ofs(c);
David Woodhouse9fe48542006-05-23 00:38:06 +010097
98 jffs2_dbg_prewrite_paranoia_check(c, flash_ofs, vecs[0].iov_len + vecs[1].iov_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
Estelle Hammache9b88f472005-01-28 18:53:05 +0000100 if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(ri->version) < f->highest_version)) {
101 BUG_ON(!retried);
Joe Perches9c261b32012-02-15 15:56:43 -0800102 jffs2_dbg(1, "%s(): dnode_version %d, highest version %d -> updating dnode\n",
103 __func__,
104 je32_to_cpu(ri->version), f->highest_version);
Estelle Hammache9b88f472005-01-28 18:53:05 +0000105 ri->version = cpu_to_je32(++f->highest_version);
106 ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
Estelle Hammachee4803c32005-01-24 21:13:42 +0000107 }
108
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 ret = jffs2_flash_writev(c, vecs, cnt, flash_ofs, &retlen,
110 (alloc_mode==ALLOC_GC)?0:f->inocache->ino);
111
112 if (ret || (retlen != sizeof(*ri) + datalen)) {
Joe Perchesda320f02012-02-15 15:56:44 -0800113 pr_notice("Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n",
114 sizeof(*ri) + datalen, flash_ofs, ret, retlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115
116 /* Mark the space as dirtied */
117 if (retlen) {
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000118 /* Don't change raw->size to match retlen. We may have
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 written the node header already, and only the data will
120 seem corrupted, in which case the scan would skip over
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000121 any node we write before the original intended end of
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 this node */
David Woodhouse2f785402006-05-24 02:04:45 +0100123 jffs2_add_physical_node_ref(c, flash_ofs | REF_OBSOLETE, PAD(sizeof(*ri)+datalen), NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 } else {
Joe Perchesda320f02012-02-15 15:56:44 -0800125 pr_notice("Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n",
126 flash_ofs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 }
David Woodhouse2f785402006-05-24 02:04:45 +0100128 if (!retried && alloc_mode != ALLOC_NORETRY) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 /* Try to reallocate space and retry */
130 uint32_t dummy;
131 struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size];
132
133 retried = 1;
134
Joe Perches9c261b32012-02-15 15:56:43 -0800135 jffs2_dbg(1, "Retrying failed write.\n");
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000136
Artem B. Bityutskiy730554d2005-07-17 07:56:26 +0100137 jffs2_dbg_acct_sanity_check(c,jeb);
138 jffs2_dbg_acct_paranoia_check(c, jeb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
140 if (alloc_mode == ALLOC_GC) {
David Woodhouse9fe48542006-05-23 00:38:06 +0100141 ret = jffs2_reserve_space_gc(c, sizeof(*ri) + datalen, &dummy,
142 JFFS2_SUMMARY_INODE_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 } else {
144 /* Locking pain */
David Woodhouseced22072008-04-22 15:13:40 +0100145 mutex_unlock(&f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 jffs2_complete_reservation(c);
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000147
David Woodhouse9fe48542006-05-23 00:38:06 +0100148 ret = jffs2_reserve_space(c, sizeof(*ri) + datalen, &dummy,
149 alloc_mode, JFFS2_SUMMARY_INODE_SIZE);
David Woodhouseced22072008-04-22 15:13:40 +0100150 mutex_lock(&f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 }
152
153 if (!ret) {
David Woodhouse9fe48542006-05-23 00:38:06 +0100154 flash_ofs = write_ofs(c);
Joe Perches9c261b32012-02-15 15:56:43 -0800155 jffs2_dbg(1, "Allocated space at 0x%08x to retry failed write.\n",
156 flash_ofs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
Artem B. Bityutskiy730554d2005-07-17 07:56:26 +0100158 jffs2_dbg_acct_sanity_check(c,jeb);
159 jffs2_dbg_acct_paranoia_check(c, jeb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
161 goto retry;
162 }
Joe Perches9c261b32012-02-15 15:56:43 -0800163 jffs2_dbg(1, "Failed to allocate space to retry failed write: %d!\n",
164 ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 }
166 /* Release the full_dnode which is now useless, and return */
167 jffs2_free_full_dnode(fn);
168 return ERR_PTR(ret?ret:-EIO);
169 }
170 /* Mark the space used */
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000171 /* If node covers at least a whole page, or if it starts at the
172 beginning of a page and runs to the end of the file, or if
173 it's a hole node, mark it REF_PRISTINE, else REF_NORMAL.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 */
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300175 if ((je32_to_cpu(ri->dsize) >= PAGE_SIZE) ||
176 ( ((je32_to_cpu(ri->offset)&(PAGE_SIZE-1))==0) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 (je32_to_cpu(ri->dsize)+je32_to_cpu(ri->offset) == je32_to_cpu(ri->isize)))) {
David Woodhouse2f785402006-05-24 02:04:45 +0100178 flash_ofs |= REF_PRISTINE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 } else {
David Woodhouse2f785402006-05-24 02:04:45 +0100180 flash_ofs |= REF_NORMAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 }
David Woodhouse2f785402006-05-24 02:04:45 +0100182 fn->raw = jffs2_add_physical_node_ref(c, flash_ofs, PAD(sizeof(*ri)+datalen), f->inocache);
Joakim Tjernlund5bd5c032007-06-24 19:22:29 +0200183 if (IS_ERR(fn->raw)) {
184 void *hold_err = fn->raw;
185 /* Release the full_dnode which is now useless, and return */
186 jffs2_free_full_dnode(fn);
David Howellse231c2e2008-02-07 00:15:26 -0800187 return ERR_CAST(hold_err);
Joakim Tjernlund5bd5c032007-06-24 19:22:29 +0200188 }
David Woodhouse2f785402006-05-24 02:04:45 +0100189 fn->ofs = je32_to_cpu(ri->offset);
190 fn->size = je32_to_cpu(ri->dsize);
191 fn->frags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
Joe Perches9c261b32012-02-15 15:56:43 -0800193 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",
David Woodhouse2f785402006-05-24 02:04:45 +0100194 flash_ofs & ~3, flash_ofs & 3, je32_to_cpu(ri->dsize),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 je32_to_cpu(ri->csize), je32_to_cpu(ri->node_crc),
Joe Perches9c261b32012-02-15 15:56:43 -0800196 je32_to_cpu(ri->data_crc), je32_to_cpu(ri->totlen));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
198 if (retried) {
Artem B. Bityutskiy730554d2005-07-17 07:56:26 +0100199 jffs2_dbg_acct_sanity_check(c,NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 }
201
202 return fn;
203}
204
David Woodhouse9fe48542006-05-23 00:38:06 +0100205struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
206 struct jffs2_raw_dirent *rd, const unsigned char *name,
207 uint32_t namelen, int alloc_mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 struct jffs2_full_dirent *fd;
210 size_t retlen;
211 struct kvec vecs[2];
David Woodhouse2f785402006-05-24 02:04:45 +0100212 uint32_t flash_ofs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 int retried = 0;
214 int ret;
215
Joe Perches9c261b32012-02-15 15:56:43 -0800216 jffs2_dbg(1, "%s(ino #%u, name at *0x%p \"%s\"->ino #%u, name_crc 0x%08x)\n",
217 __func__,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 je32_to_cpu(rd->pino), name, name, je32_to_cpu(rd->ino),
Joe Perches9c261b32012-02-15 15:56:43 -0800219 je32_to_cpu(rd->name_crc));
Artem B. Bityutskiy730554d2005-07-17 07:56:26 +0100220
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 D1(if(je32_to_cpu(rd->hdr_crc) != crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)) {
Joe Perchesda320f02012-02-15 15:56:44 -0800222 pr_crit("Eep. CRC not correct in jffs2_write_dirent()\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 BUG();
David Woodhouse2f785402006-05-24 02:04:45 +0100224 });
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225
David Woodhouse69ca4372007-10-13 11:33:50 +0100226 if (strnlen(name, namelen) != namelen) {
227 /* This should never happen, but seems to have done on at least one
228 occasion: https://dev.laptop.org/ticket/4184 */
Joe Perchesda320f02012-02-15 15:56:44 -0800229 pr_crit("Error in jffs2_write_dirent() -- name contains zero bytes!\n");
230 pr_crit("Directory inode #%u, name at *0x%p \"%s\"->ino #%u, name_crc 0x%08x\n",
231 je32_to_cpu(rd->pino), name, name, je32_to_cpu(rd->ino),
232 je32_to_cpu(rd->name_crc));
David Woodhouse69ca4372007-10-13 11:33:50 +0100233 WARN_ON(1);
234 return ERR_PTR(-EIO);
235 }
236
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 vecs[0].iov_base = rd;
238 vecs[0].iov_len = sizeof(*rd);
239 vecs[1].iov_base = (unsigned char *)name;
240 vecs[1].iov_len = namelen;
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000241
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 fd = jffs2_alloc_full_dirent(namelen+1);
David Woodhouse2f785402006-05-24 02:04:45 +0100243 if (!fd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 return ERR_PTR(-ENOMEM);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245
246 fd->version = je32_to_cpu(rd->version);
247 fd->ino = je32_to_cpu(rd->ino);
David Woodhouse69ca4372007-10-13 11:33:50 +0100248 fd->nhash = full_name_hash(name, namelen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 fd->type = rd->type;
250 memcpy(fd->name, name, namelen);
251 fd->name[namelen]=0;
252
253 retry:
David Woodhouse2f785402006-05-24 02:04:45 +0100254 flash_ofs = write_ofs(c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255
David Woodhouse2f785402006-05-24 02:04:45 +0100256 jffs2_dbg_prewrite_paranoia_check(c, flash_ofs, vecs[0].iov_len + vecs[1].iov_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
Estelle Hammache9b88f472005-01-28 18:53:05 +0000258 if ((alloc_mode!=ALLOC_GC) && (je32_to_cpu(rd->version) < f->highest_version)) {
259 BUG_ON(!retried);
Joe Perches9c261b32012-02-15 15:56:43 -0800260 jffs2_dbg(1, "%s(): dirent_version %d, highest version %d -> updating dirent\n",
261 __func__,
262 je32_to_cpu(rd->version), f->highest_version);
Estelle Hammache9b88f472005-01-28 18:53:05 +0000263 rd->version = cpu_to_je32(++f->highest_version);
264 fd->version = je32_to_cpu(rd->version);
265 rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
Estelle Hammachee4803c32005-01-24 21:13:42 +0000266 }
267
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 ret = jffs2_flash_writev(c, vecs, 2, flash_ofs, &retlen,
269 (alloc_mode==ALLOC_GC)?0:je32_to_cpu(rd->pino));
270 if (ret || (retlen != sizeof(*rd) + namelen)) {
Joe Perchesda320f02012-02-15 15:56:44 -0800271 pr_notice("Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n",
272 sizeof(*rd) + namelen, flash_ofs, ret, retlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 /* Mark the space as dirtied */
274 if (retlen) {
David Woodhouse2f785402006-05-24 02:04:45 +0100275 jffs2_add_physical_node_ref(c, flash_ofs | REF_OBSOLETE, PAD(sizeof(*rd)+namelen), NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 } else {
Joe Perchesda320f02012-02-15 15:56:44 -0800277 pr_notice("Not marking the space at 0x%08x as dirty because the flash driver returned retlen zero\n",
278 flash_ofs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 }
David Woodhouse2f785402006-05-24 02:04:45 +0100280 if (!retried) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 /* Try to reallocate space and retry */
282 uint32_t dummy;
283 struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size];
284
285 retried = 1;
286
Joe Perches9c261b32012-02-15 15:56:43 -0800287 jffs2_dbg(1, "Retrying failed write.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288
Artem B. Bityutskiy730554d2005-07-17 07:56:26 +0100289 jffs2_dbg_acct_sanity_check(c,jeb);
290 jffs2_dbg_acct_paranoia_check(c, jeb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291
292 if (alloc_mode == ALLOC_GC) {
David Woodhouse9fe48542006-05-23 00:38:06 +0100293 ret = jffs2_reserve_space_gc(c, sizeof(*rd) + namelen, &dummy,
294 JFFS2_SUMMARY_DIRENT_SIZE(namelen));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 } else {
296 /* Locking pain */
David Woodhouseced22072008-04-22 15:13:40 +0100297 mutex_unlock(&f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 jffs2_complete_reservation(c);
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000299
David Woodhouse9fe48542006-05-23 00:38:06 +0100300 ret = jffs2_reserve_space(c, sizeof(*rd) + namelen, &dummy,
301 alloc_mode, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
David Woodhouseced22072008-04-22 15:13:40 +0100302 mutex_lock(&f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 }
304
305 if (!ret) {
David Woodhouse9fe48542006-05-23 00:38:06 +0100306 flash_ofs = write_ofs(c);
Joe Perches9c261b32012-02-15 15:56:43 -0800307 jffs2_dbg(1, "Allocated space at 0x%08x to retry failed write\n",
308 flash_ofs);
Artem B. Bityutskiy730554d2005-07-17 07:56:26 +0100309 jffs2_dbg_acct_sanity_check(c,jeb);
310 jffs2_dbg_acct_paranoia_check(c, jeb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 goto retry;
312 }
Joe Perches9c261b32012-02-15 15:56:43 -0800313 jffs2_dbg(1, "Failed to allocate space to retry failed write: %d!\n",
314 ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 }
316 /* Release the full_dnode which is now useless, and return */
317 jffs2_free_full_dirent(fd);
318 return ERR_PTR(ret?ret:-EIO);
319 }
320 /* Mark the space used */
David Woodhouse71c23392007-06-29 13:39:57 +0100321 fd->raw = jffs2_add_physical_node_ref(c, flash_ofs | dirent_node_state(rd),
322 PAD(sizeof(*rd)+namelen), f->inocache);
Joakim Tjernlund5bd5c032007-06-24 19:22:29 +0200323 if (IS_ERR(fd->raw)) {
324 void *hold_err = fd->raw;
325 /* Release the full_dirent which is now useless, and return */
326 jffs2_free_full_dirent(fd);
David Howellse231c2e2008-02-07 00:15:26 -0800327 return ERR_CAST(hold_err);
Joakim Tjernlund5bd5c032007-06-24 19:22:29 +0200328 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329
330 if (retried) {
Artem B. Bityutskiy730554d2005-07-17 07:56:26 +0100331 jffs2_dbg_acct_sanity_check(c,NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 }
333
334 return fd;
335}
336
337/* The OS-specific code fills in the metadata in the jffs2_raw_inode for us, so that
338 we don't have to go digging in struct inode or its equivalent. It should set:
339 mode, uid, gid, (starting)isize, atime, ctime, mtime */
340int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000341 struct jffs2_raw_inode *ri, unsigned char *buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 uint32_t offset, uint32_t writelen, uint32_t *retlen)
343{
344 int ret = 0;
345 uint32_t writtenlen = 0;
346
Joe Perches9c261b32012-02-15 15:56:43 -0800347 jffs2_dbg(1, "%s(): Ino #%u, ofs 0x%x, len 0x%x\n",
348 __func__, f->inocache->ino, offset, writelen);
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000349
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 while(writelen) {
351 struct jffs2_full_dnode *fn;
352 unsigned char *comprbuf = NULL;
353 uint16_t comprtype = JFFS2_COMPR_NONE;
David Woodhouse9fe48542006-05-23 00:38:06 +0100354 uint32_t alloclen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 uint32_t datalen, cdatalen;
356 int retried = 0;
357
358 retry:
Joe Perches9c261b32012-02-15 15:56:43 -0800359 jffs2_dbg(2, "jffs2_commit_write() loop: 0x%x to write to 0x%x\n",
360 writelen, offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
David Woodhouse9fe48542006-05-23 00:38:06 +0100362 ret = jffs2_reserve_space(c, sizeof(*ri) + JFFS2_MIN_DATA_LEN,
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100363 &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 if (ret) {
Joe Perches9c261b32012-02-15 15:56:43 -0800365 jffs2_dbg(1, "jffs2_reserve_space returned %d\n", ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 break;
367 }
David Woodhouseced22072008-04-22 15:13:40 +0100368 mutex_lock(&f->sem);
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +0300369 datalen = min_t(uint32_t, writelen,
370 PAGE_SIZE - (offset & (PAGE_SIZE-1)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 cdatalen = min_t(uint32_t, alloclen - sizeof(*ri), datalen);
372
373 comprtype = jffs2_compress(c, f, buf, &comprbuf, &datalen, &cdatalen);
374
375 ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
376 ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE);
377 ri->totlen = cpu_to_je32(sizeof(*ri) + cdatalen);
378 ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
379
380 ri->ino = cpu_to_je32(f->inocache->ino);
381 ri->version = cpu_to_je32(++f->highest_version);
382 ri->isize = cpu_to_je32(max(je32_to_cpu(ri->isize), offset + datalen));
383 ri->offset = cpu_to_je32(offset);
384 ri->csize = cpu_to_je32(cdatalen);
385 ri->dsize = cpu_to_je32(datalen);
386 ri->compr = comprtype & 0xff;
387 ri->usercompr = (comprtype >> 8 ) & 0xff;
388 ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
389 ri->data_crc = cpu_to_je32(crc32(0, comprbuf, cdatalen));
390
David Woodhouse9fe48542006-05-23 00:38:06 +0100391 fn = jffs2_write_dnode(c, f, ri, comprbuf, cdatalen, ALLOC_NORETRY);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392
393 jffs2_free_comprbuf(comprbuf, buf);
394
395 if (IS_ERR(fn)) {
396 ret = PTR_ERR(fn);
David Woodhouseced22072008-04-22 15:13:40 +0100397 mutex_unlock(&f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 jffs2_complete_reservation(c);
399 if (!retried) {
400 /* Write error to be retried */
401 retried = 1;
Joe Perches9c261b32012-02-15 15:56:43 -0800402 jffs2_dbg(1, "Retrying node write in jffs2_write_inode_range()\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 goto retry;
404 }
405 break;
406 }
407 ret = jffs2_add_full_dnode_to_inode(c, f, fn);
408 if (f->metadata) {
409 jffs2_mark_node_obsolete(c, f->metadata->raw);
410 jffs2_free_full_dnode(f->metadata);
411 f->metadata = NULL;
412 }
413 if (ret) {
414 /* Eep */
Joe Perches9c261b32012-02-15 15:56:43 -0800415 jffs2_dbg(1, "Eep. add_full_dnode_to_inode() failed in commit_write, returned %d\n",
416 ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 jffs2_mark_node_obsolete(c, fn->raw);
418 jffs2_free_full_dnode(fn);
419
David Woodhouseced22072008-04-22 15:13:40 +0100420 mutex_unlock(&f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 jffs2_complete_reservation(c);
422 break;
423 }
David Woodhouseced22072008-04-22 15:13:40 +0100424 mutex_unlock(&f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 jffs2_complete_reservation(c);
426 if (!datalen) {
Joe Perchesda320f02012-02-15 15:56:44 -0800427 pr_warn("Eep. We didn't actually write any data in jffs2_write_inode_range()\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 ret = -EIO;
429 break;
430 }
Joe Perches9c261b32012-02-15 15:56:43 -0800431 jffs2_dbg(1, "increasing writtenlen by %d\n", datalen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 writtenlen += datalen;
433 offset += datalen;
434 writelen -= datalen;
435 buf += datalen;
436 }
437 *retlen = writtenlen;
438 return ret;
439}
440
Eric Paris2a7dba32011-02-01 11:05:39 -0500441int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f,
442 struct jffs2_inode_info *f, struct jffs2_raw_inode *ri,
443 const struct qstr *qstr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444{
445 struct jffs2_raw_dirent *rd;
446 struct jffs2_full_dnode *fn;
447 struct jffs2_full_dirent *fd;
David Woodhouse9fe48542006-05-23 00:38:06 +0100448 uint32_t alloclen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 int ret;
450
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000451 /* Try to reserve enough space for both node and dirent.
452 * Just the node will do for now, though
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 */
David Woodhouse9fe48542006-05-23 00:38:06 +0100454 ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL,
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100455 JFFS2_SUMMARY_INODE_SIZE);
Joe Perches9c261b32012-02-15 15:56:43 -0800456 jffs2_dbg(1, "%s(): reserved 0x%x bytes\n", __func__, alloclen);
David Woodhouse590fe342008-05-01 15:53:28 +0100457 if (ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 return ret;
David Woodhouse590fe342008-05-01 15:53:28 +0100459
460 mutex_lock(&f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461
462 ri->data_crc = cpu_to_je32(0);
463 ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
464
David Woodhouse9fe48542006-05-23 00:38:06 +0100465 fn = jffs2_write_dnode(c, f, ri, NULL, 0, ALLOC_NORMAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466
Joe Perches9c261b32012-02-15 15:56:43 -0800467 jffs2_dbg(1, "jffs2_do_create created file with mode 0x%x\n",
468 jemode_to_cpu(ri->mode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469
470 if (IS_ERR(fn)) {
Joe Perches9c261b32012-02-15 15:56:43 -0800471 jffs2_dbg(1, "jffs2_write_dnode() failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 /* Eeek. Wave bye bye */
David Woodhouseced22072008-04-22 15:13:40 +0100473 mutex_unlock(&f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 jffs2_complete_reservation(c);
475 return PTR_ERR(fn);
476 }
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000477 /* No data here. Only a metadata node, which will be
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 obsoleted by the first data write
479 */
480 f->metadata = fn;
481
David Woodhouseced22072008-04-22 15:13:40 +0100482 mutex_unlock(&f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 jffs2_complete_reservation(c);
KaiGai Koheicfc8dc62007-09-14 15:16:35 +0900484
Eric Paris2a7dba32011-02-01 11:05:39 -0500485 ret = jffs2_init_security(&f->vfs_inode, &dir_f->vfs_inode, qstr);
KaiGai Koheicfc8dc62007-09-14 15:16:35 +0900486 if (ret)
487 return ret;
488 ret = jffs2_init_acl_post(&f->vfs_inode);
489 if (ret)
490 return ret;
491
Eric Paris2a7dba32011-02-01 11:05:39 -0500492 ret = jffs2_reserve_space(c, sizeof(*rd)+qstr->len, &alloclen,
493 ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(qstr->len));
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000494
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 if (ret) {
496 /* Eep. */
Joe Perches9c261b32012-02-15 15:56:43 -0800497 jffs2_dbg(1, "jffs2_reserve_space() for dirent failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 return ret;
499 }
500
501 rd = jffs2_alloc_raw_dirent();
502 if (!rd) {
503 /* Argh. Now we treat it like a normal delete */
504 jffs2_complete_reservation(c);
505 return -ENOMEM;
506 }
507
David Woodhouseced22072008-04-22 15:13:40 +0100508 mutex_lock(&dir_f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509
510 rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
511 rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
Eric Paris2a7dba32011-02-01 11:05:39 -0500512 rd->totlen = cpu_to_je32(sizeof(*rd) + qstr->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
514
515 rd->pino = cpu_to_je32(dir_f->inocache->ino);
516 rd->version = cpu_to_je32(++dir_f->highest_version);
517 rd->ino = ri->ino;
518 rd->mctime = ri->ctime;
Eric Paris2a7dba32011-02-01 11:05:39 -0500519 rd->nsize = qstr->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520 rd->type = DT_REG;
521 rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
Eric Paris2a7dba32011-02-01 11:05:39 -0500522 rd->name_crc = cpu_to_je32(crc32(0, qstr->name, qstr->len));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523
Eric Paris2a7dba32011-02-01 11:05:39 -0500524 fd = jffs2_write_dirent(c, dir_f, rd, qstr->name, qstr->len, ALLOC_NORMAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525
526 jffs2_free_raw_dirent(rd);
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000527
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 if (IS_ERR(fd)) {
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000529 /* dirent failed to write. Delete the inode normally
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 as if it were the final unlink() */
531 jffs2_complete_reservation(c);
David Woodhouseced22072008-04-22 15:13:40 +0100532 mutex_unlock(&dir_f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 return PTR_ERR(fd);
534 }
535
536 /* Link the fd into the inode's list, obsoleting an old
537 one if necessary. */
538 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
539
540 jffs2_complete_reservation(c);
David Woodhouseced22072008-04-22 15:13:40 +0100541 mutex_unlock(&dir_f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542
543 return 0;
544}
545
546
547int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f,
Artem B. Bityutskiy3a69e0c2005-08-17 14:46:26 +0100548 const char *name, int namelen, struct jffs2_inode_info *dead_f,
549 uint32_t time)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550{
551 struct jffs2_raw_dirent *rd;
552 struct jffs2_full_dirent *fd;
David Woodhouse9fe48542006-05-23 00:38:06 +0100553 uint32_t alloclen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 int ret;
555
Joakim Tjernlunda4914862007-03-16 16:15:45 +0100556 if (!jffs2_can_mark_obsolete(c)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 /* We can't mark stuff obsolete on the medium. We need to write a deletion dirent */
558
559 rd = jffs2_alloc_raw_dirent();
560 if (!rd)
561 return -ENOMEM;
562
David Woodhouse9fe48542006-05-23 00:38:06 +0100563 ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100564 ALLOC_DELETION, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 if (ret) {
566 jffs2_free_raw_dirent(rd);
567 return ret;
568 }
569
David Woodhouseced22072008-04-22 15:13:40 +0100570 mutex_lock(&dir_f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571
572 /* Build a deletion node */
573 rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
574 rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
575 rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
576 rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000577
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 rd->pino = cpu_to_je32(dir_f->inocache->ino);
579 rd->version = cpu_to_je32(++dir_f->highest_version);
580 rd->ino = cpu_to_je32(0);
Artem B. Bityutskiy3a69e0c2005-08-17 14:46:26 +0100581 rd->mctime = cpu_to_je32(time);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 rd->nsize = namelen;
583 rd->type = DT_UNKNOWN;
584 rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
585 rd->name_crc = cpu_to_je32(crc32(0, name, namelen));
586
David Woodhouse9fe48542006-05-23 00:38:06 +0100587 fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, ALLOC_DELETION);
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000588
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 jffs2_free_raw_dirent(rd);
590
591 if (IS_ERR(fd)) {
592 jffs2_complete_reservation(c);
David Woodhouseced22072008-04-22 15:13:40 +0100593 mutex_unlock(&dir_f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 return PTR_ERR(fd);
595 }
596
597 /* File it. This will mark the old one obsolete. */
598 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
David Woodhouseced22072008-04-22 15:13:40 +0100599 mutex_unlock(&dir_f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 uint32_t nhash = full_name_hash(name, namelen);
602
Harvey Harrisonbf667372008-04-18 13:44:14 -0700603 fd = dir_f->dents;
David Woodhouseb5748642007-08-20 11:05:29 +0100604 /* We don't actually want to reserve any space, but we do
605 want to be holding the alloc_sem when we write to flash */
David Woodhouseced22072008-04-22 15:13:40 +0100606 mutex_lock(&c->alloc_sem);
607 mutex_lock(&dir_f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608
David Woodhouse15953582007-11-01 16:25:56 -0400609 for (fd = dir_f->dents; fd; fd = fd->next) {
610 if (fd->nhash == nhash &&
611 !memcmp(fd->name, name, namelen) &&
612 !fd->name[namelen]) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613
Joe Perches9c261b32012-02-15 15:56:43 -0800614 jffs2_dbg(1, "Marking old dirent node (ino #%u) @%08x obsolete\n",
615 fd->ino, ref_offset(fd->raw));
David Woodhouse15953582007-11-01 16:25:56 -0400616 jffs2_mark_node_obsolete(c, fd->raw);
617 /* We don't want to remove it from the list immediately,
618 because that screws up getdents()/seek() semantics even
619 more than they're screwed already. Turn it into a
620 node-less deletion dirent instead -- a placeholder */
621 fd->raw = NULL;
622 fd->ino = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 break;
624 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 }
David Woodhouseced22072008-04-22 15:13:40 +0100626 mutex_unlock(&dir_f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 }
628
629 /* dead_f is NULL if this was a rename not a real unlink */
630 /* Also catch the !f->inocache case, where there was a dirent
631 pointing to an inode which didn't exist. */
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000632 if (dead_f && dead_f->inocache) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633
David Woodhouseced22072008-04-22 15:13:40 +0100634 mutex_lock(&dead_f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635
Artem B. Bityuckiy32f1a952005-03-01 10:50:52 +0000636 if (S_ISDIR(OFNI_EDONI_2SFFJ(dead_f)->i_mode)) {
637 while (dead_f->dents) {
638 /* There can be only deleted ones */
639 fd = dead_f->dents;
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000640
Artem B. Bityuckiy32f1a952005-03-01 10:50:52 +0000641 dead_f->dents = fd->next;
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000642
Artem B. Bityuckiy32f1a952005-03-01 10:50:52 +0000643 if (fd->ino) {
Joe Perchesda320f02012-02-15 15:56:44 -0800644 pr_warn("Deleting inode #%u with active dentry \"%s\"->ino #%u\n",
645 dead_f->inocache->ino,
646 fd->name, fd->ino);
Artem B. Bityuckiy32f1a952005-03-01 10:50:52 +0000647 } else {
Joe Perches9c261b32012-02-15 15:56:43 -0800648 jffs2_dbg(1, "Removing deletion dirent for \"%s\" from dir ino #%u\n",
649 fd->name,
650 dead_f->inocache->ino);
Artem B. Bityuckiy32f1a952005-03-01 10:50:52 +0000651 }
David Woodhouse15953582007-11-01 16:25:56 -0400652 if (fd->raw)
653 jffs2_mark_node_obsolete(c, fd->raw);
Artem B. Bityuckiy32f1a952005-03-01 10:50:52 +0000654 jffs2_free_full_dirent(fd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 }
David Woodhouse27c72b02008-05-01 18:47:17 +0100656 dead_f->inocache->pino_nlink = 0;
657 } else
658 dead_f->inocache->pino_nlink--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 /* NB: Caller must set inode nlink if appropriate */
David Woodhouseced22072008-04-22 15:13:40 +0100660 mutex_unlock(&dead_f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 }
662
663 jffs2_complete_reservation(c);
664
665 return 0;
666}
667
668
Artem B. Bityutskiy3a69e0c2005-08-17 14:46:26 +0100669int 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)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670{
671 struct jffs2_raw_dirent *rd;
672 struct jffs2_full_dirent *fd;
David Woodhouse9fe48542006-05-23 00:38:06 +0100673 uint32_t alloclen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 int ret;
675
676 rd = jffs2_alloc_raw_dirent();
677 if (!rd)
678 return -ENOMEM;
679
David Woodhouse9fe48542006-05-23 00:38:06 +0100680 ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100681 ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 if (ret) {
683 jffs2_free_raw_dirent(rd);
684 return ret;
685 }
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000686
David Woodhouseced22072008-04-22 15:13:40 +0100687 mutex_lock(&dir_f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688
689 /* Build a deletion node */
690 rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
691 rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
692 rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
693 rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
694
695 rd->pino = cpu_to_je32(dir_f->inocache->ino);
696 rd->version = cpu_to_je32(++dir_f->highest_version);
697 rd->ino = cpu_to_je32(ino);
Artem B. Bityutskiy3a69e0c2005-08-17 14:46:26 +0100698 rd->mctime = cpu_to_je32(time);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699 rd->nsize = namelen;
700
701 rd->type = type;
702
703 rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
704 rd->name_crc = cpu_to_je32(crc32(0, name, namelen));
705
David Woodhouse9fe48542006-05-23 00:38:06 +0100706 fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, ALLOC_NORMAL);
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000707
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 jffs2_free_raw_dirent(rd);
709
710 if (IS_ERR(fd)) {
711 jffs2_complete_reservation(c);
David Woodhouseced22072008-04-22 15:13:40 +0100712 mutex_unlock(&dir_f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 return PTR_ERR(fd);
714 }
715
716 /* File it. This will mark the old one obsolete. */
717 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
718
719 jffs2_complete_reservation(c);
David Woodhouseced22072008-04-22 15:13:40 +0100720 mutex_unlock(&dir_f->sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721
722 return 0;
723}