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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * JFFS2 -- Journalling Flash File System, Version 2. | |
3 | * | |
c00c310e | 4 | * Copyright © 2001-2007 Red Hat, Inc. |
6088c058 | 5 | * Copyright © 2004-2010 David Woodhouse <dwmw2@infradead.org> |
1da177e4 LT |
6 | * |
7 | * Created by David Woodhouse <dwmw2@infradead.org> | |
8 | * | |
9 | * For licensing information, see the file 'LICENCE' in this directory. | |
10 | * | |
1da177e4 LT |
11 | */ |
12 | ||
16f7e0fe | 13 | #include <linux/capability.h> |
1da177e4 LT |
14 | #include <linux/kernel.h> |
15 | #include <linux/sched.h> | |
16 | #include <linux/fs.h> | |
17 | #include <linux/list.h> | |
18 | #include <linux/mtd/mtd.h> | |
19 | #include <linux/pagemap.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/vmalloc.h> | |
22 | #include <linux/vfs.h> | |
23 | #include <linux/crc32.h> | |
337eb00a | 24 | #include <linux/smp_lock.h> |
1da177e4 LT |
25 | #include "nodelist.h" |
26 | ||
27 | static int jffs2_flash_setup(struct jffs2_sb_info *c); | |
28 | ||
9ed437c5 | 29 | int jffs2_do_setattr (struct inode *inode, struct iattr *iattr) |
1da177e4 LT |
30 | { |
31 | struct jffs2_full_dnode *old_metadata, *new_metadata; | |
32 | struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); | |
33 | struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); | |
34 | struct jffs2_raw_inode *ri; | |
aef9ab47 | 35 | union jffs2_device_node dev; |
1da177e4 LT |
36 | unsigned char *mdata = NULL; |
37 | int mdatalen = 0; | |
38 | unsigned int ivalid; | |
9fe4854c | 39 | uint32_t alloclen; |
1da177e4 | 40 | int ret; |
dd919660 | 41 | int alloc_type = ALLOC_NORMAL; |
9ed437c5 | 42 | |
1da177e4 | 43 | D1(printk(KERN_DEBUG "jffs2_setattr(): ino #%lu\n", inode->i_ino)); |
1da177e4 LT |
44 | |
45 | /* Special cases - we don't want more than one data node | |
46 | for these types on the medium at any time. So setattr | |
47 | must read the original data associated with the node | |
48 | (i.e. the device numbers or the target name) and write | |
49 | it out again with the appropriate data attached */ | |
50 | if (S_ISBLK(inode->i_mode) || S_ISCHR(inode->i_mode)) { | |
51 | /* For these, we don't actually need to read the old node */ | |
aef9ab47 | 52 | mdatalen = jffs2_encode_dev(&dev, inode->i_rdev); |
1da177e4 | 53 | mdata = (char *)&dev; |
1da177e4 LT |
54 | D1(printk(KERN_DEBUG "jffs2_setattr(): Writing %d bytes of kdev_t\n", mdatalen)); |
55 | } else if (S_ISLNK(inode->i_mode)) { | |
ced22070 | 56 | mutex_lock(&f->sem); |
1da177e4 LT |
57 | mdatalen = f->metadata->size; |
58 | mdata = kmalloc(f->metadata->size, GFP_USER); | |
422138dd | 59 | if (!mdata) { |
ced22070 | 60 | mutex_unlock(&f->sem); |
1da177e4 | 61 | return -ENOMEM; |
422138dd | 62 | } |
1da177e4 LT |
63 | ret = jffs2_read_dnode(c, f, f->metadata, mdata, 0, mdatalen); |
64 | if (ret) { | |
ced22070 | 65 | mutex_unlock(&f->sem); |
1da177e4 LT |
66 | kfree(mdata); |
67 | return ret; | |
68 | } | |
ced22070 | 69 | mutex_unlock(&f->sem); |
1da177e4 LT |
70 | D1(printk(KERN_DEBUG "jffs2_setattr(): Writing %d bytes of symlink target\n", mdatalen)); |
71 | } | |
72 | ||
73 | ri = jffs2_alloc_raw_inode(); | |
74 | if (!ri) { | |
75 | if (S_ISLNK(inode->i_mode)) | |
76 | kfree(mdata); | |
77 | return -ENOMEM; | |
78 | } | |
182ec4ee | 79 | |
9fe4854c DW |
80 | ret = jffs2_reserve_space(c, sizeof(*ri) + mdatalen, &alloclen, |
81 | ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); | |
1da177e4 LT |
82 | if (ret) { |
83 | jffs2_free_raw_inode(ri); | |
84 | if (S_ISLNK(inode->i_mode & S_IFMT)) | |
85 | kfree(mdata); | |
86 | return ret; | |
87 | } | |
ced22070 | 88 | mutex_lock(&f->sem); |
1da177e4 | 89 | ivalid = iattr->ia_valid; |
182ec4ee | 90 | |
1da177e4 LT |
91 | ri->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); |
92 | ri->nodetype = cpu_to_je16(JFFS2_NODETYPE_INODE); | |
93 | ri->totlen = cpu_to_je32(sizeof(*ri) + mdatalen); | |
94 | ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4)); | |
95 | ||
96 | ri->ino = cpu_to_je32(inode->i_ino); | |
97 | ri->version = cpu_to_je32(++f->highest_version); | |
98 | ||
99 | ri->uid = cpu_to_je16((ivalid & ATTR_UID)?iattr->ia_uid:inode->i_uid); | |
100 | ri->gid = cpu_to_je16((ivalid & ATTR_GID)?iattr->ia_gid:inode->i_gid); | |
101 | ||
102 | if (ivalid & ATTR_MODE) | |
857013b8 | 103 | ri->mode = cpu_to_jemode(iattr->ia_mode); |
1da177e4 LT |
104 | else |
105 | ri->mode = cpu_to_jemode(inode->i_mode); | |
106 | ||
107 | ||
108 | ri->isize = cpu_to_je32((ivalid & ATTR_SIZE)?iattr->ia_size:inode->i_size); | |
109 | ri->atime = cpu_to_je32(I_SEC((ivalid & ATTR_ATIME)?iattr->ia_atime:inode->i_atime)); | |
110 | ri->mtime = cpu_to_je32(I_SEC((ivalid & ATTR_MTIME)?iattr->ia_mtime:inode->i_mtime)); | |
111 | ri->ctime = cpu_to_je32(I_SEC((ivalid & ATTR_CTIME)?iattr->ia_ctime:inode->i_ctime)); | |
112 | ||
113 | ri->offset = cpu_to_je32(0); | |
114 | ri->csize = ri->dsize = cpu_to_je32(mdatalen); | |
115 | ri->compr = JFFS2_COMPR_NONE; | |
116 | if (ivalid & ATTR_SIZE && inode->i_size < iattr->ia_size) { | |
117 | /* It's an extension. Make it a hole node */ | |
118 | ri->compr = JFFS2_COMPR_ZERO; | |
119 | ri->dsize = cpu_to_je32(iattr->ia_size - inode->i_size); | |
120 | ri->offset = cpu_to_je32(inode->i_size); | |
dd919660 DW |
121 | } else if (ivalid & ATTR_SIZE && !iattr->ia_size) { |
122 | /* For truncate-to-zero, treat it as deletion because | |
123 | it'll always be obsoleting all previous nodes */ | |
124 | alloc_type = ALLOC_DELETION; | |
1da177e4 LT |
125 | } |
126 | ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); | |
127 | if (mdatalen) | |
128 | ri->data_crc = cpu_to_je32(crc32(0, mdata, mdatalen)); | |
129 | else | |
130 | ri->data_crc = cpu_to_je32(0); | |
131 | ||
dd919660 | 132 | new_metadata = jffs2_write_dnode(c, f, ri, mdata, mdatalen, alloc_type); |
1da177e4 LT |
133 | if (S_ISLNK(inode->i_mode)) |
134 | kfree(mdata); | |
182ec4ee | 135 | |
1da177e4 LT |
136 | if (IS_ERR(new_metadata)) { |
137 | jffs2_complete_reservation(c); | |
138 | jffs2_free_raw_inode(ri); | |
ced22070 | 139 | mutex_unlock(&f->sem); |
1da177e4 LT |
140 | return PTR_ERR(new_metadata); |
141 | } | |
142 | /* It worked. Update the inode */ | |
143 | inode->i_atime = ITIME(je32_to_cpu(ri->atime)); | |
144 | inode->i_ctime = ITIME(je32_to_cpu(ri->ctime)); | |
145 | inode->i_mtime = ITIME(je32_to_cpu(ri->mtime)); | |
146 | inode->i_mode = jemode_to_cpu(ri->mode); | |
147 | inode->i_uid = je16_to_cpu(ri->uid); | |
148 | inode->i_gid = je16_to_cpu(ri->gid); | |
149 | ||
150 | ||
151 | old_metadata = f->metadata; | |
152 | ||
153 | if (ivalid & ATTR_SIZE && inode->i_size > iattr->ia_size) | |
f302cd02 | 154 | jffs2_truncate_fragtree (c, &f->fragtree, iattr->ia_size); |
1da177e4 LT |
155 | |
156 | if (ivalid & ATTR_SIZE && inode->i_size < iattr->ia_size) { | |
157 | jffs2_add_full_dnode_to_inode(c, f, new_metadata); | |
158 | inode->i_size = iattr->ia_size; | |
b28ba9fa | 159 | inode->i_blocks = (inode->i_size + 511) >> 9; |
1da177e4 LT |
160 | f->metadata = NULL; |
161 | } else { | |
162 | f->metadata = new_metadata; | |
163 | } | |
164 | if (old_metadata) { | |
165 | jffs2_mark_node_obsolete(c, old_metadata->raw); | |
166 | jffs2_free_full_dnode(old_metadata); | |
167 | } | |
168 | jffs2_free_raw_inode(ri); | |
169 | ||
ced22070 | 170 | mutex_unlock(&f->sem); |
1da177e4 LT |
171 | jffs2_complete_reservation(c); |
172 | ||
2c27c65e | 173 | /* We have to do the truncate_setsize() without f->sem held, since |
182ec4ee | 174 | some pages may be locked and waiting for it in readpage(). |
1da177e4 LT |
175 | We are protected from a simultaneous write() extending i_size |
176 | back past iattr->ia_size, because do_truncate() holds the | |
177 | generic inode semaphore. */ | |
b28ba9fa | 178 | if (ivalid & ATTR_SIZE && inode->i_size > iattr->ia_size) { |
2c27c65e | 179 | truncate_setsize(inode, iattr->ia_size); |
b28ba9fa DW |
180 | inode->i_blocks = (inode->i_size + 511) >> 9; |
181 | } | |
1da177e4 LT |
182 | |
183 | return 0; | |
184 | } | |
185 | ||
186 | int jffs2_setattr(struct dentry *dentry, struct iattr *iattr) | |
187 | { | |
aa98d7cf KK |
188 | int rc; |
189 | ||
9ed437c5 DW |
190 | rc = inode_change_ok(dentry->d_inode, iattr); |
191 | if (rc) | |
192 | return rc; | |
193 | ||
aa98d7cf KK |
194 | rc = jffs2_do_setattr(dentry->d_inode, iattr); |
195 | if (!rc && (iattr->ia_valid & ATTR_MODE)) | |
196 | rc = jffs2_acl_chmod(dentry->d_inode); | |
9ed437c5 | 197 | |
aa98d7cf | 198 | return rc; |
1da177e4 LT |
199 | } |
200 | ||
726c3342 | 201 | int jffs2_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 202 | { |
726c3342 | 203 | struct jffs2_sb_info *c = JFFS2_SB_INFO(dentry->d_sb); |
1da177e4 LT |
204 | unsigned long avail; |
205 | ||
206 | buf->f_type = JFFS2_SUPER_MAGIC; | |
207 | buf->f_bsize = 1 << PAGE_SHIFT; | |
208 | buf->f_blocks = c->flash_size >> PAGE_SHIFT; | |
209 | buf->f_files = 0; | |
210 | buf->f_ffree = 0; | |
211 | buf->f_namelen = JFFS2_MAX_NAME_LEN; | |
75caf6b5 DW |
212 | buf->f_fsid.val[0] = JFFS2_SUPER_MAGIC; |
213 | buf->f_fsid.val[1] = c->mtd->index; | |
1da177e4 LT |
214 | |
215 | spin_lock(&c->erase_completion_lock); | |
1da177e4 LT |
216 | avail = c->dirty_size + c->free_size; |
217 | if (avail > c->sector_size * c->resv_blocks_write) | |
218 | avail -= c->sector_size * c->resv_blocks_write; | |
219 | else | |
220 | avail = 0; | |
e0c8e42f | 221 | spin_unlock(&c->erase_completion_lock); |
1da177e4 LT |
222 | |
223 | buf->f_bavail = buf->f_bfree = avail >> PAGE_SHIFT; | |
224 | ||
1da177e4 LT |
225 | return 0; |
226 | } | |
227 | ||
228 | ||
b57922d9 | 229 | void jffs2_evict_inode (struct inode *inode) |
1da177e4 | 230 | { |
182ec4ee | 231 | /* We can forget about this inode for now - drop all |
1da177e4 LT |
232 | * the nodelists associated with it, etc. |
233 | */ | |
234 | struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb); | |
235 | struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); | |
182ec4ee | 236 | |
b57922d9 AV |
237 | D1(printk(KERN_DEBUG "jffs2_evict_inode(): ino #%lu mode %o\n", inode->i_ino, inode->i_mode)); |
238 | truncate_inode_pages(&inode->i_data, 0); | |
239 | end_writeback(inode); | |
1da177e4 LT |
240 | jffs2_do_clear_inode(c, f); |
241 | } | |
242 | ||
5451f79f | 243 | struct inode *jffs2_iget(struct super_block *sb, unsigned long ino) |
1da177e4 LT |
244 | { |
245 | struct jffs2_inode_info *f; | |
246 | struct jffs2_sb_info *c; | |
247 | struct jffs2_raw_inode latest_node; | |
aef9ab47 | 248 | union jffs2_device_node jdev; |
5451f79f | 249 | struct inode *inode; |
aef9ab47 | 250 | dev_t rdev = 0; |
1da177e4 LT |
251 | int ret; |
252 | ||
5451f79f DH |
253 | D1(printk(KERN_DEBUG "jffs2_iget(): ino == %lu\n", ino)); |
254 | ||
255 | inode = iget_locked(sb, ino); | |
256 | if (!inode) | |
257 | return ERR_PTR(-ENOMEM); | |
258 | if (!(inode->i_state & I_NEW)) | |
259 | return inode; | |
1da177e4 LT |
260 | |
261 | f = JFFS2_INODE_INFO(inode); | |
262 | c = JFFS2_SB_INFO(inode->i_sb); | |
263 | ||
264 | jffs2_init_inode_info(f); | |
ced22070 | 265 | mutex_lock(&f->sem); |
182ec4ee | 266 | |
1da177e4 LT |
267 | ret = jffs2_do_read_inode(c, f, inode->i_ino, &latest_node); |
268 | ||
269 | if (ret) { | |
ced22070 | 270 | mutex_unlock(&f->sem); |
5451f79f DH |
271 | iget_failed(inode); |
272 | return ERR_PTR(ret); | |
1da177e4 LT |
273 | } |
274 | inode->i_mode = jemode_to_cpu(latest_node.mode); | |
275 | inode->i_uid = je16_to_cpu(latest_node.uid); | |
276 | inode->i_gid = je16_to_cpu(latest_node.gid); | |
277 | inode->i_size = je32_to_cpu(latest_node.isize); | |
278 | inode->i_atime = ITIME(je32_to_cpu(latest_node.atime)); | |
279 | inode->i_mtime = ITIME(je32_to_cpu(latest_node.mtime)); | |
280 | inode->i_ctime = ITIME(je32_to_cpu(latest_node.ctime)); | |
281 | ||
27c72b04 | 282 | inode->i_nlink = f->inocache->pino_nlink; |
1da177e4 | 283 | |
1da177e4 | 284 | inode->i_blocks = (inode->i_size + 511) >> 9; |
182ec4ee | 285 | |
1da177e4 | 286 | switch (inode->i_mode & S_IFMT) { |
1da177e4 LT |
287 | |
288 | case S_IFLNK: | |
289 | inode->i_op = &jffs2_symlink_inode_operations; | |
290 | break; | |
182ec4ee | 291 | |
1da177e4 LT |
292 | case S_IFDIR: |
293 | { | |
294 | struct jffs2_full_dirent *fd; | |
27c72b04 | 295 | inode->i_nlink = 2; /* parent and '.' */ |
1da177e4 LT |
296 | |
297 | for (fd=f->dents; fd; fd = fd->next) { | |
298 | if (fd->type == DT_DIR && fd->ino) | |
d8c76e6f | 299 | inc_nlink(inode); |
1da177e4 | 300 | } |
1da177e4 LT |
301 | /* Root dir gets i_nlink 3 for some reason */ |
302 | if (inode->i_ino == 1) | |
d8c76e6f | 303 | inc_nlink(inode); |
1da177e4 LT |
304 | |
305 | inode->i_op = &jffs2_dir_inode_operations; | |
306 | inode->i_fop = &jffs2_dir_operations; | |
307 | break; | |
308 | } | |
309 | case S_IFREG: | |
310 | inode->i_op = &jffs2_file_inode_operations; | |
311 | inode->i_fop = &jffs2_file_operations; | |
312 | inode->i_mapping->a_ops = &jffs2_file_address_operations; | |
313 | inode->i_mapping->nrpages = 0; | |
314 | break; | |
315 | ||
316 | case S_IFBLK: | |
317 | case S_IFCHR: | |
318 | /* Read the device numbers from the media */ | |
91f80266 AM |
319 | if (f->metadata->size != sizeof(jdev.old_id) && |
320 | f->metadata->size != sizeof(jdev.new_id)) { | |
aef9ab47 | 321 | printk(KERN_NOTICE "Device node has strange size %d\n", f->metadata->size); |
5451f79f | 322 | goto error_io; |
aef9ab47 | 323 | } |
1da177e4 | 324 | D1(printk(KERN_DEBUG "Reading device numbers from flash\n")); |
5451f79f DH |
325 | ret = jffs2_read_dnode(c, f, f->metadata, (char *)&jdev, 0, f->metadata->size); |
326 | if (ret < 0) { | |
1da177e4 LT |
327 | /* Eep */ |
328 | printk(KERN_NOTICE "Read device numbers for inode %lu failed\n", (unsigned long)inode->i_ino); | |
5451f79f | 329 | goto error; |
182ec4ee | 330 | } |
91f80266 AM |
331 | if (f->metadata->size == sizeof(jdev.old_id)) |
332 | rdev = old_decode_dev(je16_to_cpu(jdev.old_id)); | |
aef9ab47 | 333 | else |
91f80266 | 334 | rdev = new_decode_dev(je32_to_cpu(jdev.new_id)); |
1da177e4 LT |
335 | |
336 | case S_IFSOCK: | |
337 | case S_IFIFO: | |
338 | inode->i_op = &jffs2_file_inode_operations; | |
aef9ab47 | 339 | init_special_inode(inode, inode->i_mode, rdev); |
1da177e4 LT |
340 | break; |
341 | ||
342 | default: | |
343 | printk(KERN_WARNING "jffs2_read_inode(): Bogus imode %o for ino %lu\n", inode->i_mode, (unsigned long)inode->i_ino); | |
344 | } | |
345 | ||
ced22070 | 346 | mutex_unlock(&f->sem); |
1da177e4 LT |
347 | |
348 | D1(printk(KERN_DEBUG "jffs2_read_inode() returning\n")); | |
5451f79f DH |
349 | unlock_new_inode(inode); |
350 | return inode; | |
351 | ||
352 | error_io: | |
353 | ret = -EIO; | |
354 | error: | |
ced22070 | 355 | mutex_unlock(&f->sem); |
5451f79f DH |
356 | jffs2_do_clear_inode(c, f); |
357 | iget_failed(inode); | |
358 | return ERR_PTR(ret); | |
1da177e4 LT |
359 | } |
360 | ||
361 | void jffs2_dirty_inode(struct inode *inode) | |
362 | { | |
363 | struct iattr iattr; | |
364 | ||
365 | if (!(inode->i_state & I_DIRTY_DATASYNC)) { | |
366 | D2(printk(KERN_DEBUG "jffs2_dirty_inode() not calling setattr() for ino #%lu\n", inode->i_ino)); | |
367 | return; | |
368 | } | |
369 | ||
370 | D1(printk(KERN_DEBUG "jffs2_dirty_inode() calling setattr() for ino #%lu\n", inode->i_ino)); | |
371 | ||
372 | iattr.ia_valid = ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_MTIME|ATTR_CTIME; | |
373 | iattr.ia_mode = inode->i_mode; | |
374 | iattr.ia_uid = inode->i_uid; | |
375 | iattr.ia_gid = inode->i_gid; | |
376 | iattr.ia_atime = inode->i_atime; | |
377 | iattr.ia_mtime = inode->i_mtime; | |
378 | iattr.ia_ctime = inode->i_ctime; | |
379 | ||
380 | jffs2_do_setattr(inode, &iattr); | |
381 | } | |
382 | ||
383 | int jffs2_remount_fs (struct super_block *sb, int *flags, char *data) | |
384 | { | |
385 | struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); | |
386 | ||
387 | if (c->flags & JFFS2_SB_FLAG_RO && !(sb->s_flags & MS_RDONLY)) | |
388 | return -EROFS; | |
389 | ||
390 | /* We stop if it was running, then restart if it needs to. | |
391 | This also catches the case where it was stopped and this | |
392 | is just a remount to restart it. | |
393 | Flush the writebuffer, if neccecary, else we loose it */ | |
337eb00a | 394 | lock_kernel(); |
1da177e4 LT |
395 | if (!(sb->s_flags & MS_RDONLY)) { |
396 | jffs2_stop_garbage_collect_thread(c); | |
ced22070 | 397 | mutex_lock(&c->alloc_sem); |
1da177e4 | 398 | jffs2_flush_wbuf_pad(c); |
ced22070 | 399 | mutex_unlock(&c->alloc_sem); |
182ec4ee | 400 | } |
1da177e4 LT |
401 | |
402 | if (!(*flags & MS_RDONLY)) | |
403 | jffs2_start_garbage_collect_thread(c); | |
182ec4ee | 404 | |
1da177e4 LT |
405 | *flags |= MS_NOATIME; |
406 | ||
337eb00a | 407 | unlock_kernel(); |
1da177e4 LT |
408 | return 0; |
409 | } | |
410 | ||
1da177e4 LT |
411 | /* jffs2_new_inode: allocate a new inode and inocache, add it to the hash, |
412 | fill in the raw_inode while you're at it. */ | |
cfc8dc6f | 413 | struct inode *jffs2_new_inode (struct inode *dir_i, int mode, struct jffs2_raw_inode *ri) |
1da177e4 LT |
414 | { |
415 | struct inode *inode; | |
416 | struct super_block *sb = dir_i->i_sb; | |
417 | struct jffs2_sb_info *c; | |
418 | struct jffs2_inode_info *f; | |
419 | int ret; | |
420 | ||
421 | D1(printk(KERN_DEBUG "jffs2_new_inode(): dir_i %ld, mode 0x%x\n", dir_i->i_ino, mode)); | |
422 | ||
423 | c = JFFS2_SB_INFO(sb); | |
182ec4ee | 424 | |
1da177e4 | 425 | inode = new_inode(sb); |
182ec4ee | 426 | |
1da177e4 LT |
427 | if (!inode) |
428 | return ERR_PTR(-ENOMEM); | |
429 | ||
430 | f = JFFS2_INODE_INFO(inode); | |
431 | jffs2_init_inode_info(f); | |
ced22070 | 432 | mutex_lock(&f->sem); |
1da177e4 LT |
433 | |
434 | memset(ri, 0, sizeof(*ri)); | |
435 | /* Set OS-specific defaults for new inodes */ | |
3fc678a0 | 436 | ri->uid = cpu_to_je16(current_fsuid()); |
1da177e4 LT |
437 | |
438 | if (dir_i->i_mode & S_ISGID) { | |
439 | ri->gid = cpu_to_je16(dir_i->i_gid); | |
440 | if (S_ISDIR(mode)) | |
441 | mode |= S_ISGID; | |
442 | } else { | |
3fc678a0 | 443 | ri->gid = cpu_to_je16(current_fsgid()); |
1da177e4 | 444 | } |
9ed437c5 DW |
445 | |
446 | /* POSIX ACLs have to be processed now, at least partly. | |
447 | The umask is only applied if there's no default ACL */ | |
cfc8dc6f KK |
448 | ret = jffs2_init_acl_pre(dir_i, inode, &mode); |
449 | if (ret) { | |
450 | make_bad_inode(inode); | |
451 | iput(inode); | |
452 | return ERR_PTR(ret); | |
9ed437c5 | 453 | } |
1da177e4 LT |
454 | ret = jffs2_do_new_inode (c, f, mode, ri); |
455 | if (ret) { | |
456 | make_bad_inode(inode); | |
457 | iput(inode); | |
458 | return ERR_PTR(ret); | |
459 | } | |
460 | inode->i_nlink = 1; | |
461 | inode->i_ino = je32_to_cpu(ri->ino); | |
462 | inode->i_mode = jemode_to_cpu(ri->mode); | |
463 | inode->i_gid = je16_to_cpu(ri->gid); | |
464 | inode->i_uid = je16_to_cpu(ri->uid); | |
465 | inode->i_atime = inode->i_ctime = inode->i_mtime = CURRENT_TIME_SEC; | |
466 | ri->atime = ri->mtime = ri->ctime = cpu_to_je32(I_SEC(inode->i_mtime)); | |
467 | ||
1da177e4 LT |
468 | inode->i_blocks = 0; |
469 | inode->i_size = 0; | |
470 | ||
e72e6497 DW |
471 | if (insert_inode_locked(inode) < 0) { |
472 | make_bad_inode(inode); | |
473 | unlock_new_inode(inode); | |
474 | iput(inode); | |
475 | return ERR_PTR(-EINVAL); | |
476 | } | |
1da177e4 LT |
477 | |
478 | return inode; | |
479 | } | |
480 | ||
481 | ||
482 | int jffs2_do_fill_super(struct super_block *sb, void *data, int silent) | |
483 | { | |
484 | struct jffs2_sb_info *c; | |
485 | struct inode *root_i; | |
486 | int ret; | |
487 | size_t blocks; | |
488 | ||
489 | c = JFFS2_SB_INFO(sb); | |
490 | ||
2f82ce1e | 491 | #ifndef CONFIG_JFFS2_FS_WRITEBUFFER |
1da177e4 LT |
492 | if (c->mtd->type == MTD_NANDFLASH) { |
493 | printk(KERN_ERR "jffs2: Cannot operate on NAND flash unless jffs2 NAND support is compiled in.\n"); | |
494 | return -EINVAL; | |
495 | } | |
8f15fd55 AV |
496 | if (c->mtd->type == MTD_DATAFLASH) { |
497 | printk(KERN_ERR "jffs2: Cannot operate on DataFlash unless jffs2 DataFlash support is compiled in.\n"); | |
498 | return -EINVAL; | |
499 | } | |
500 | #endif | |
1da177e4 LT |
501 | |
502 | c->flash_size = c->mtd->size; | |
182ec4ee | 503 | c->sector_size = c->mtd->erasesize; |
1da177e4 | 504 | blocks = c->flash_size / c->sector_size; |
1da177e4 LT |
505 | |
506 | /* | |
507 | * Size alignment check | |
508 | */ | |
509 | if ((c->sector_size * blocks) != c->flash_size) { | |
182ec4ee | 510 | c->flash_size = c->sector_size * blocks; |
1da177e4 LT |
511 | printk(KERN_INFO "jffs2: Flash size not aligned to erasesize, reducing to %dKiB\n", |
512 | c->flash_size / 1024); | |
513 | } | |
514 | ||
1da177e4 LT |
515 | if (c->flash_size < 5*c->sector_size) { |
516 | printk(KERN_ERR "jffs2: Too few erase blocks (%d)\n", c->flash_size / c->sector_size); | |
517 | return -EINVAL; | |
518 | } | |
519 | ||
520 | c->cleanmarker_size = sizeof(struct jffs2_unknown_node); | |
1da177e4 LT |
521 | |
522 | /* NAND (or other bizarre) flash... do setup accordingly */ | |
523 | ret = jffs2_flash_setup(c); | |
524 | if (ret) | |
525 | return ret; | |
526 | ||
3d375d9e | 527 | c->inocache_list = kcalloc(INOCACHE_HASHSIZE, sizeof(struct jffs2_inode_cache *), GFP_KERNEL); |
1da177e4 LT |
528 | if (!c->inocache_list) { |
529 | ret = -ENOMEM; | |
530 | goto out_wbuf; | |
531 | } | |
1da177e4 | 532 | |
aa98d7cf KK |
533 | jffs2_init_xattr_subsystem(c); |
534 | ||
1da177e4 LT |
535 | if ((ret = jffs2_do_mount_fs(c))) |
536 | goto out_inohash; | |
537 | ||
1da177e4 | 538 | D1(printk(KERN_DEBUG "jffs2_do_fill_super(): Getting root inode\n")); |
5451f79f DH |
539 | root_i = jffs2_iget(sb, 1); |
540 | if (IS_ERR(root_i)) { | |
1da177e4 | 541 | D1(printk(KERN_WARNING "get root inode failed\n")); |
5451f79f DH |
542 | ret = PTR_ERR(root_i); |
543 | goto out_root; | |
1da177e4 LT |
544 | } |
545 | ||
5451f79f DH |
546 | ret = -ENOMEM; |
547 | ||
1da177e4 LT |
548 | D1(printk(KERN_DEBUG "jffs2_do_fill_super(): d_alloc_root()\n")); |
549 | sb->s_root = d_alloc_root(root_i); | |
550 | if (!sb->s_root) | |
551 | goto out_root_i; | |
552 | ||
1da177e4 | 553 | sb->s_maxbytes = 0xFFFFFFFF; |
1da177e4 LT |
554 | sb->s_blocksize = PAGE_CACHE_SIZE; |
555 | sb->s_blocksize_bits = PAGE_CACHE_SHIFT; | |
556 | sb->s_magic = JFFS2_SUPER_MAGIC; | |
557 | if (!(sb->s_flags & MS_RDONLY)) | |
558 | jffs2_start_garbage_collect_thread(c); | |
559 | return 0; | |
560 | ||
561 | out_root_i: | |
562 | iput(root_i); | |
5451f79f | 563 | out_root: |
1da177e4 LT |
564 | jffs2_free_ino_caches(c); |
565 | jffs2_free_raw_node_refs(c); | |
4ce1f562 | 566 | if (jffs2_blocks_use_vmalloc(c)) |
1da177e4 LT |
567 | vfree(c->blocks); |
568 | else | |
569 | kfree(c->blocks); | |
570 | out_inohash: | |
aa98d7cf | 571 | jffs2_clear_xattr_subsystem(c); |
1da177e4 LT |
572 | kfree(c->inocache_list); |
573 | out_wbuf: | |
574 | jffs2_flash_cleanup(c); | |
575 | ||
576 | return ret; | |
577 | } | |
578 | ||
579 | void jffs2_gc_release_inode(struct jffs2_sb_info *c, | |
580 | struct jffs2_inode_info *f) | |
581 | { | |
582 | iput(OFNI_EDONI_2SFFJ(f)); | |
583 | } | |
584 | ||
585 | struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c, | |
1b690b48 | 586 | int inum, int unlinked) |
1da177e4 LT |
587 | { |
588 | struct inode *inode; | |
589 | struct jffs2_inode_cache *ic; | |
1b690b48 DW |
590 | |
591 | if (unlinked) { | |
1da177e4 | 592 | /* The inode has zero nlink but its nodes weren't yet marked |
182ec4ee | 593 | obsolete. This has to be because we're still waiting for |
1da177e4 LT |
594 | the final (close() and) iput() to happen. |
595 | ||
182ec4ee | 596 | There's a possibility that the final iput() could have |
1da177e4 LT |
597 | happened while we were contemplating. In order to ensure |
598 | that we don't cause a new read_inode() (which would fail) | |
599 | for the inode in question, we use ilookup() in this case | |
600 | instead of iget(). | |
601 | ||
182ec4ee | 602 | The nlink can't _become_ zero at this point because we're |
1da177e4 LT |
603 | holding the alloc_sem, and jffs2_do_unlink() would also |
604 | need that while decrementing nlink on any inode. | |
605 | */ | |
606 | inode = ilookup(OFNI_BS_2SFFJ(c), inum); | |
607 | if (!inode) { | |
608 | D1(printk(KERN_DEBUG "ilookup() failed for ino #%u; inode is probably deleted.\n", | |
609 | inum)); | |
610 | ||
611 | spin_lock(&c->inocache_lock); | |
612 | ic = jffs2_get_ino_cache(c, inum); | |
613 | if (!ic) { | |
614 | D1(printk(KERN_DEBUG "Inode cache for ino #%u is gone.\n", inum)); | |
615 | spin_unlock(&c->inocache_lock); | |
616 | return NULL; | |
617 | } | |
618 | if (ic->state != INO_STATE_CHECKEDABSENT) { | |
619 | /* Wait for progress. Don't just loop */ | |
620 | D1(printk(KERN_DEBUG "Waiting for ino #%u in state %d\n", | |
621 | ic->ino, ic->state)); | |
622 | sleep_on_spinunlock(&c->inocache_wq, &c->inocache_lock); | |
623 | } else { | |
624 | spin_unlock(&c->inocache_lock); | |
625 | } | |
626 | ||
627 | return NULL; | |
628 | } | |
629 | } else { | |
630 | /* Inode has links to it still; they're not going away because | |
631 | jffs2_do_unlink() would need the alloc_sem and we have it. | |
632 | Just iget() it, and if read_inode() is necessary that's OK. | |
633 | */ | |
5451f79f DH |
634 | inode = jffs2_iget(OFNI_BS_2SFFJ(c), inum); |
635 | if (IS_ERR(inode)) | |
636 | return ERR_CAST(inode); | |
1da177e4 LT |
637 | } |
638 | if (is_bad_inode(inode)) { | |
1b690b48 DW |
639 | printk(KERN_NOTICE "Eep. read_inode() failed for ino #%u. unlinked %d\n", |
640 | inum, unlinked); | |
1da177e4 LT |
641 | /* NB. This will happen again. We need to do something appropriate here. */ |
642 | iput(inode); | |
643 | return ERR_PTR(-EIO); | |
644 | } | |
645 | ||
646 | return JFFS2_INODE_INFO(inode); | |
647 | } | |
648 | ||
182ec4ee TG |
649 | unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c, |
650 | struct jffs2_inode_info *f, | |
1da177e4 LT |
651 | unsigned long offset, |
652 | unsigned long *priv) | |
653 | { | |
654 | struct inode *inode = OFNI_EDONI_2SFFJ(f); | |
655 | struct page *pg; | |
656 | ||
fc0e0197 | 657 | pg = read_cache_page_async(inode->i_mapping, offset >> PAGE_CACHE_SHIFT, |
1da177e4 LT |
658 | (void *)jffs2_do_readpage_unlock, inode); |
659 | if (IS_ERR(pg)) | |
660 | return (void *)pg; | |
182ec4ee | 661 | |
1da177e4 LT |
662 | *priv = (unsigned long)pg; |
663 | return kmap(pg); | |
664 | } | |
665 | ||
666 | void jffs2_gc_release_page(struct jffs2_sb_info *c, | |
667 | unsigned char *ptr, | |
668 | unsigned long *priv) | |
669 | { | |
670 | struct page *pg = (void *)*priv; | |
671 | ||
672 | kunmap(pg); | |
673 | page_cache_release(pg); | |
674 | } | |
675 | ||
676 | static int jffs2_flash_setup(struct jffs2_sb_info *c) { | |
677 | int ret = 0; | |
182ec4ee | 678 | |
1da177e4 LT |
679 | if (jffs2_cleanmarker_oob(c)) { |
680 | /* NAND flash... do setup accordingly */ | |
681 | ret = jffs2_nand_flash_setup(c); | |
682 | if (ret) | |
683 | return ret; | |
684 | } | |
685 | ||
8f15fd55 AV |
686 | /* and Dataflash */ |
687 | if (jffs2_dataflash(c)) { | |
688 | ret = jffs2_dataflash_setup(c); | |
689 | if (ret) | |
690 | return ret; | |
691 | } | |
59da721a NP |
692 | |
693 | /* and Intel "Sibley" flash */ | |
694 | if (jffs2_nor_wbuf_flash(c)) { | |
695 | ret = jffs2_nor_wbuf_flash_setup(c); | |
696 | if (ret) | |
697 | return ret; | |
698 | } | |
699 | ||
0029da3b AB |
700 | /* and an UBI volume */ |
701 | if (jffs2_ubivol(c)) { | |
702 | ret = jffs2_ubivol_setup(c); | |
703 | if (ret) | |
704 | return ret; | |
705 | } | |
706 | ||
1da177e4 LT |
707 | return ret; |
708 | } | |
709 | ||
710 | void jffs2_flash_cleanup(struct jffs2_sb_info *c) { | |
711 | ||
712 | if (jffs2_cleanmarker_oob(c)) { | |
713 | jffs2_nand_flash_cleanup(c); | |
714 | } | |
715 | ||
8f15fd55 AV |
716 | /* and DataFlash */ |
717 | if (jffs2_dataflash(c)) { | |
718 | jffs2_dataflash_cleanup(c); | |
719 | } | |
59da721a NP |
720 | |
721 | /* and Intel "Sibley" flash */ | |
722 | if (jffs2_nor_wbuf_flash(c)) { | |
723 | jffs2_nor_wbuf_flash_cleanup(c); | |
724 | } | |
0029da3b AB |
725 | |
726 | /* and an UBI volume */ | |
727 | if (jffs2_ubivol(c)) { | |
728 | jffs2_ubivol_cleanup(c); | |
729 | } | |
1da177e4 | 730 | } |