Blame view
fs/affs/inode.c
10.4 KB
1da177e4c
|
1 2 3 4 5 6 7 8 9 10 11 |
/* * linux/fs/affs/inode.c * * (c) 1996 Hans-Joachim Widmaier - Rewritten * * (C) 1993 Ray Burr - Modified for Amiga FFS filesystem. * * (C) 1992 Eric Youngdale Modified for ISO9660 filesystem. * * (C) 1991 Linus Torvalds - minix filesystem */ |
e8edc6e03
|
12 |
#include <linux/sched.h> |
5a0e3ad6a
|
13 |
#include <linux/gfp.h> |
1da177e4c
|
14 |
#include "affs.h" |
754661f14
|
15 |
extern const struct inode_operations affs_symlink_inode_operations; |
1da177e4c
|
16 |
extern struct timezone sys_tz; |
210f85596
|
17 |
struct inode *affs_iget(struct super_block *sb, unsigned long ino) |
1da177e4c
|
18 |
{ |
1da177e4c
|
19 20 21 22 |
struct affs_sb_info *sbi = AFFS_SB(sb); struct buffer_head *bh; struct affs_head *head; struct affs_tail *tail; |
210f85596
|
23 |
struct inode *inode; |
1da177e4c
|
24 25 26 27 |
u32 block; u32 size; u32 prot; u16 id; |
210f85596
|
28 29 30 31 32 33 34 35 |
inode = iget_locked(sb, ino); if (!inode) return ERR_PTR(-ENOMEM); if (!(inode->i_state & I_NEW)) return inode; pr_debug("AFFS: affs_iget(%lu) ", inode->i_ino); |
1da177e4c
|
36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 |
block = inode->i_ino; bh = affs_bread(sb, block); if (!bh) { affs_warning(sb, "read_inode", "Cannot read block %d", block); goto bad_inode; } if (affs_checksum_block(sb, bh) || be32_to_cpu(AFFS_HEAD(bh)->ptype) != T_SHORT) { affs_warning(sb,"read_inode", "Checksum or type (ptype=%d) error on inode %d", AFFS_HEAD(bh)->ptype, block); goto bad_inode; } head = AFFS_HEAD(bh); tail = AFFS_TAIL(sb, bh); prot = be32_to_cpu(tail->protect); inode->i_size = 0; |
bfe868486
|
55 |
set_nlink(inode, 1); |
1da177e4c
|
56 57 58 59 |
inode->i_mode = 0; AFFS_I(inode)->i_extcnt = 1; AFFS_I(inode)->i_ext_last = ~1; AFFS_I(inode)->i_protect = prot; |
dca3c3365
|
60 |
atomic_set(&AFFS_I(inode)->i_opencnt, 0); |
1da177e4c
|
61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 |
AFFS_I(inode)->i_blkcnt = 0; AFFS_I(inode)->i_lc = NULL; AFFS_I(inode)->i_lc_size = 0; AFFS_I(inode)->i_lc_shift = 0; AFFS_I(inode)->i_lc_mask = 0; AFFS_I(inode)->i_ac = NULL; AFFS_I(inode)->i_ext_bh = NULL; AFFS_I(inode)->mmu_private = 0; AFFS_I(inode)->i_lastalloc = 0; AFFS_I(inode)->i_pa_cnt = 0; if (sbi->s_flags & SF_SETMODE) inode->i_mode = sbi->s_mode; else inode->i_mode = prot_to_mode(prot); id = be16_to_cpu(tail->uid); if (id == 0 || sbi->s_flags & SF_SETUID) inode->i_uid = sbi->s_uid; else if (id == 0xFFFF && sbi->s_flags & SF_MUFS) inode->i_uid = 0; else inode->i_uid = id; id = be16_to_cpu(tail->gid); if (id == 0 || sbi->s_flags & SF_SETGID) inode->i_gid = sbi->s_gid; else if (id == 0xFFFF && sbi->s_flags & SF_MUFS) inode->i_gid = 0; else inode->i_gid = id; switch (be32_to_cpu(tail->stype)) { case ST_ROOT: inode->i_uid = sbi->s_uid; inode->i_gid = sbi->s_gid; /* fall through */ case ST_USERDIR: if (be32_to_cpu(tail->stype) == ST_USERDIR || sbi->s_flags & SF_SETMODE) { if (inode->i_mode & S_IRUSR) inode->i_mode |= S_IXUSR; if (inode->i_mode & S_IRGRP) inode->i_mode |= S_IXGRP; if (inode->i_mode & S_IROTH) inode->i_mode |= S_IXOTH; inode->i_mode |= S_IFDIR; } else inode->i_mode = S_IRUGO | S_IXUGO | S_IWUSR | S_IFDIR; |
1da177e4c
|
110 111 112 113 114 115 116 117 118 119 120 |
/* Maybe it should be controlled by mount parameter? */ //inode->i_mode |= S_ISVTX; inode->i_op = &affs_dir_inode_operations; inode->i_fop = &affs_dir_operations; break; case ST_LINKDIR: #if 0 affs_warning(sb, "read_inode", "inode is LINKDIR"); goto bad_inode; #else inode->i_mode |= S_IFDIR; |
c765d4790
|
121 |
/* ... and leave ->i_op and ->i_fop pointing to empty */ |
1da177e4c
|
122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 |
break; #endif case ST_LINKFILE: affs_warning(sb, "read_inode", "inode is LINKFILE"); goto bad_inode; case ST_FILE: size = be32_to_cpu(tail->size); inode->i_mode |= S_IFREG; AFFS_I(inode)->mmu_private = inode->i_size = size; if (inode->i_size) { AFFS_I(inode)->i_blkcnt = (size - 1) / sbi->s_data_blksize + 1; AFFS_I(inode)->i_extcnt = (AFFS_I(inode)->i_blkcnt - 1) / sbi->s_hashsize + 1; } if (tail->link_chain) |
bfe868486
|
138 |
set_nlink(inode, 2); |
1da177e4c
|
139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 |
inode->i_mapping->a_ops = (sbi->s_flags & SF_OFS) ? &affs_aops_ofs : &affs_aops; inode->i_op = &affs_file_inode_operations; inode->i_fop = &affs_file_operations; break; case ST_SOFTLINK: inode->i_mode |= S_IFLNK; inode->i_op = &affs_symlink_inode_operations; inode->i_data.a_ops = &affs_symlink_aops; break; } inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec = (be32_to_cpu(tail->change.days) * (24 * 60 * 60) + be32_to_cpu(tail->change.mins) * 60 + be32_to_cpu(tail->change.ticks) / 50 + ((8 * 365 + 2) * 24 * 60 * 60)) + sys_tz.tz_minuteswest * 60; inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = inode->i_atime.tv_nsec = 0; affs_brelse(bh); |
210f85596
|
158 159 |
unlock_new_inode(inode); return inode; |
1da177e4c
|
160 161 |
bad_inode: |
1da177e4c
|
162 |
affs_brelse(bh); |
210f85596
|
163 164 |
iget_failed(inode); return ERR_PTR(-EIO); |
1da177e4c
|
165 166 167 |
} int |
a9185b41a
|
168 |
affs_write_inode(struct inode *inode, struct writeback_control *wbc) |
1da177e4c
|
169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 |
{ struct super_block *sb = inode->i_sb; struct buffer_head *bh; struct affs_tail *tail; uid_t uid; gid_t gid; pr_debug("AFFS: write_inode(%lu) ",inode->i_ino); if (!inode->i_nlink) // possibly free block return 0; bh = affs_bread(sb, inode->i_ino); if (!bh) { affs_error(sb,"write_inode","Cannot read block %lu",inode->i_ino); return -EIO; } tail = AFFS_TAIL(sb, bh); if (tail->stype == cpu_to_be32(ST_ROOT)) { secs_to_datestamp(inode->i_mtime.tv_sec,&AFFS_ROOT_TAIL(sb, bh)->root_change); } else { tail->protect = cpu_to_be32(AFFS_I(inode)->i_protect); tail->size = cpu_to_be32(inode->i_size); secs_to_datestamp(inode->i_mtime.tv_sec,&tail->change); if (!(inode->i_ino == AFFS_SB(sb)->s_root_block)) { uid = inode->i_uid; gid = inode->i_gid; if (AFFS_SB(sb)->s_flags & SF_MUFS) { if (inode->i_uid == 0 || inode->i_uid == 0xFFFF) uid = inode->i_uid ^ ~0; if (inode->i_gid == 0 || inode->i_gid == 0xFFFF) gid = inode->i_gid ^ ~0; } if (!(AFFS_SB(sb)->s_flags & SF_SETUID)) tail->uid = cpu_to_be16(uid); if (!(AFFS_SB(sb)->s_flags & SF_SETGID)) tail->gid = cpu_to_be16(gid); } } affs_fix_checksum(sb, bh); mark_buffer_dirty_inode(bh, inode); affs_brelse(bh); affs_free_prealloc(inode); return 0; } int affs_notify_change(struct dentry *dentry, struct iattr *attr) { struct inode *inode = dentry->d_inode; int error; pr_debug("AFFS: notify_change(%lu,0x%x) ",inode->i_ino,attr->ia_valid); error = inode_change_ok(inode,attr); if (error) goto out; if (((attr->ia_valid & ATTR_UID) && (AFFS_SB(inode->i_sb)->s_flags & SF_SETUID)) || ((attr->ia_valid & ATTR_GID) && (AFFS_SB(inode->i_sb)->s_flags & SF_SETGID)) || ((attr->ia_valid & ATTR_MODE) && (AFFS_SB(inode->i_sb)->s_flags & (SF_SETMODE | SF_IMMUTABLE)))) { if (!(AFFS_SB(inode->i_sb)->s_flags & SF_QUIET)) error = -EPERM; goto out; } |
1025774ce
|
237 238 239 240 241 242 243 244 245 246 247 |
if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size != i_size_read(inode)) { error = vmtruncate(inode, attr->ia_size); if (error) return error; } setattr_copy(inode, attr); mark_inode_dirty(inode); if (attr->ia_valid & ATTR_MODE) |
1da177e4c
|
248 249 250 251 252 253 |
mode_to_prot(inode); out: return error; } void |
f053ddde7
|
254 |
affs_evict_inode(struct inode *inode) |
1da177e4c
|
255 |
{ |
dca3c3365
|
256 |
unsigned long cache_page; |
f053ddde7
|
257 258 259 |
pr_debug("AFFS: evict_inode(ino=%lu, nlink=%u) ", inode->i_ino, inode->i_nlink); truncate_inode_pages(&inode->i_data, 0); |
1da177e4c
|
260 |
|
f053ddde7
|
261 262 263 264 |
if (!inode->i_nlink) { inode->i_size = 0; affs_truncate(inode); } |
dca3c3365
|
265 |
|
f053ddde7
|
266 267 |
invalidate_inode_buffers(inode); end_writeback(inode); |
dca3c3365
|
268 269 |
affs_free_prealloc(inode); cache_page = (unsigned long)AFFS_I(inode)->i_lc; |
1da177e4c
|
270 271 272 273 274 275 276 277 278 279 |
if (cache_page) { pr_debug("AFFS: freeing ext cache "); AFFS_I(inode)->i_lc = NULL; AFFS_I(inode)->i_ac = NULL; free_page(cache_page); } affs_brelse(AFFS_I(inode)->i_ext_bh); AFFS_I(inode)->i_ext_last = ~1; AFFS_I(inode)->i_ext_bh = NULL; |
f053ddde7
|
280 281 282 |
if (!inode->i_nlink) affs_free_block(inode->i_sb, inode->i_ino); |
1da177e4c
|
283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 |
} struct inode * affs_new_inode(struct inode *dir) { struct super_block *sb = dir->i_sb; struct inode *inode; u32 block; struct buffer_head *bh; if (!(inode = new_inode(sb))) goto err_inode; if (!(block = affs_alloc_block(dir, dir->i_ino))) goto err_block; bh = affs_getzeroblk(sb, block); if (!bh) goto err_bh; mark_buffer_dirty_inode(bh, inode); affs_brelse(bh); |
215599815
|
304 305 |
inode->i_uid = current_fsuid(); inode->i_gid = current_fsgid(); |
1da177e4c
|
306 |
inode->i_ino = block; |
bfe868486
|
307 |
set_nlink(inode, 1); |
1da177e4c
|
308 |
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC; |
dca3c3365
|
309 |
atomic_set(&AFFS_I(inode)->i_opencnt, 0); |
1da177e4c
|
310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 |
AFFS_I(inode)->i_blkcnt = 0; AFFS_I(inode)->i_lc = NULL; AFFS_I(inode)->i_lc_size = 0; AFFS_I(inode)->i_lc_shift = 0; AFFS_I(inode)->i_lc_mask = 0; AFFS_I(inode)->i_ac = NULL; AFFS_I(inode)->i_ext_bh = NULL; AFFS_I(inode)->mmu_private = 0; AFFS_I(inode)->i_protect = 0; AFFS_I(inode)->i_lastalloc = 0; AFFS_I(inode)->i_pa_cnt = 0; AFFS_I(inode)->i_extcnt = 1; AFFS_I(inode)->i_ext_last = ~1; insert_inode_hash(inode); return inode; err_bh: affs_free_block(sb, block); err_block: iput(inode); err_inode: return NULL; } /* * Add an entry to a directory. Create the header block * and insert it into the hash table. */ int affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type) { struct super_block *sb = dir->i_sb; struct buffer_head *inode_bh = NULL; struct buffer_head *bh = NULL; u32 block = 0; int retval; pr_debug("AFFS: add_entry(dir=%u, inode=%u, \"%*s\", type=%d) ", (u32)dir->i_ino, (u32)inode->i_ino, (int)dentry->d_name.len, dentry->d_name.name, type); retval = -EIO; bh = affs_bread(sb, inode->i_ino); if (!bh) goto done; affs_lock_link(inode); switch (type) { case ST_LINKFILE: case ST_LINKDIR: |
1da177e4c
|
363 364 365 366 367 |
retval = -ENOSPC; block = affs_alloc_block(dir, dir->i_ino); if (!block) goto err; retval = -EIO; |
dca3c3365
|
368 |
inode_bh = bh; |
1da177e4c
|
369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 |
bh = affs_getzeroblk(sb, block); if (!bh) goto err; break; default: break; } AFFS_HEAD(bh)->ptype = cpu_to_be32(T_SHORT); AFFS_HEAD(bh)->key = cpu_to_be32(bh->b_blocknr); affs_copy_name(AFFS_TAIL(sb, bh)->name, dentry); AFFS_TAIL(sb, bh)->stype = cpu_to_be32(type); AFFS_TAIL(sb, bh)->parent = cpu_to_be32(dir->i_ino); if (inode_bh) { __be32 chain; chain = AFFS_TAIL(sb, inode_bh)->link_chain; AFFS_TAIL(sb, bh)->original = cpu_to_be32(inode->i_ino); AFFS_TAIL(sb, bh)->link_chain = chain; AFFS_TAIL(sb, inode_bh)->link_chain = cpu_to_be32(block); affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain)); mark_buffer_dirty_inode(inode_bh, inode); |
bfe868486
|
391 |
set_nlink(inode, 2); |
7de9c6ee3
|
392 |
ihold(inode); |
1da177e4c
|
393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 |
} affs_fix_checksum(sb, bh); mark_buffer_dirty_inode(bh, inode); dentry->d_fsdata = (void *)(long)bh->b_blocknr; affs_lock_dir(dir); retval = affs_insert_hash(dir, bh); mark_buffer_dirty_inode(bh, inode); affs_unlock_dir(dir); affs_unlock_link(inode); d_instantiate(dentry, inode); done: affs_brelse(inode_bh); affs_brelse(bh); return retval; err: if (block) affs_free_block(sb, block); affs_unlock_link(inode); goto done; } |