Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * inode.c |
| 3 | * |
| 4 | * Copyright (C) 1995, 1996 by Paal-Kr. Engstad and Volker Lendecke |
| 5 | * Copyright (C) 1997 by Volker Lendecke |
| 6 | * |
| 7 | * Please add a note about your changes to smbfs in the ChangeLog file. |
| 8 | */ |
| 9 | |
| 10 | #include <linux/config.h> |
| 11 | #include <linux/module.h> |
| 12 | #include <linux/time.h> |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/mm.h> |
| 15 | #include <linux/string.h> |
| 16 | #include <linux/stat.h> |
| 17 | #include <linux/errno.h> |
| 18 | #include <linux/slab.h> |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/file.h> |
| 21 | #include <linux/dcache.h> |
| 22 | #include <linux/smp_lock.h> |
| 23 | #include <linux/nls.h> |
| 24 | #include <linux/seq_file.h> |
| 25 | #include <linux/mount.h> |
| 26 | #include <linux/net.h> |
| 27 | #include <linux/vfs.h> |
| 28 | #include <linux/highuid.h> |
| 29 | #include <linux/smb_fs.h> |
| 30 | #include <linux/smbno.h> |
| 31 | #include <linux/smb_mount.h> |
| 32 | |
| 33 | #include <asm/system.h> |
| 34 | #include <asm/uaccess.h> |
| 35 | |
| 36 | #include "smb_debug.h" |
| 37 | #include "getopt.h" |
| 38 | #include "proto.h" |
| 39 | |
| 40 | /* Always pick a default string */ |
| 41 | #ifdef CONFIG_SMB_NLS_REMOTE |
| 42 | #define SMB_NLS_REMOTE CONFIG_SMB_NLS_REMOTE |
| 43 | #else |
| 44 | #define SMB_NLS_REMOTE "" |
| 45 | #endif |
| 46 | |
| 47 | #define SMB_TTL_DEFAULT 1000 |
| 48 | |
| 49 | static void smb_delete_inode(struct inode *); |
| 50 | static void smb_put_super(struct super_block *); |
| 51 | static int smb_statfs(struct super_block *, struct kstatfs *); |
| 52 | static int smb_show_options(struct seq_file *, struct vfsmount *); |
| 53 | |
| 54 | static kmem_cache_t *smb_inode_cachep; |
| 55 | |
| 56 | static struct inode *smb_alloc_inode(struct super_block *sb) |
| 57 | { |
| 58 | struct smb_inode_info *ei; |
| 59 | ei = (struct smb_inode_info *)kmem_cache_alloc(smb_inode_cachep, SLAB_KERNEL); |
| 60 | if (!ei) |
| 61 | return NULL; |
| 62 | return &ei->vfs_inode; |
| 63 | } |
| 64 | |
| 65 | static void smb_destroy_inode(struct inode *inode) |
| 66 | { |
| 67 | kmem_cache_free(smb_inode_cachep, SMB_I(inode)); |
| 68 | } |
| 69 | |
| 70 | static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) |
| 71 | { |
| 72 | struct smb_inode_info *ei = (struct smb_inode_info *) foo; |
| 73 | unsigned long flagmask = SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR; |
| 74 | |
| 75 | if ((flags & flagmask) == SLAB_CTOR_CONSTRUCTOR) |
| 76 | inode_init_once(&ei->vfs_inode); |
| 77 | } |
| 78 | |
| 79 | static int init_inodecache(void) |
| 80 | { |
| 81 | smb_inode_cachep = kmem_cache_create("smb_inode_cache", |
| 82 | sizeof(struct smb_inode_info), |
| 83 | 0, SLAB_RECLAIM_ACCOUNT, |
| 84 | init_once, NULL); |
| 85 | if (smb_inode_cachep == NULL) |
| 86 | return -ENOMEM; |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | static void destroy_inodecache(void) |
| 91 | { |
| 92 | if (kmem_cache_destroy(smb_inode_cachep)) |
| 93 | printk(KERN_INFO "smb_inode_cache: not all structures were freed\n"); |
| 94 | } |
| 95 | |
| 96 | static int smb_remount(struct super_block *sb, int *flags, char *data) |
| 97 | { |
| 98 | *flags |= MS_NODIRATIME; |
| 99 | return 0; |
| 100 | } |
| 101 | |
| 102 | static struct super_operations smb_sops = |
| 103 | { |
| 104 | .alloc_inode = smb_alloc_inode, |
| 105 | .destroy_inode = smb_destroy_inode, |
| 106 | .drop_inode = generic_delete_inode, |
| 107 | .delete_inode = smb_delete_inode, |
| 108 | .put_super = smb_put_super, |
| 109 | .statfs = smb_statfs, |
| 110 | .show_options = smb_show_options, |
| 111 | .remount_fs = smb_remount, |
| 112 | }; |
| 113 | |
| 114 | |
| 115 | /* We are always generating a new inode here */ |
| 116 | struct inode * |
| 117 | smb_iget(struct super_block *sb, struct smb_fattr *fattr) |
| 118 | { |
| 119 | struct smb_sb_info *server = SMB_SB(sb); |
| 120 | struct inode *result; |
| 121 | |
| 122 | DEBUG1("smb_iget: %p\n", fattr); |
| 123 | |
| 124 | result = new_inode(sb); |
| 125 | if (!result) |
| 126 | return result; |
| 127 | result->i_ino = fattr->f_ino; |
| 128 | SMB_I(result)->open = 0; |
| 129 | SMB_I(result)->fileid = 0; |
| 130 | SMB_I(result)->access = 0; |
| 131 | SMB_I(result)->flags = 0; |
| 132 | SMB_I(result)->closed = 0; |
| 133 | SMB_I(result)->openers = 0; |
| 134 | smb_set_inode_attr(result, fattr); |
| 135 | if (S_ISREG(result->i_mode)) { |
| 136 | result->i_op = &smb_file_inode_operations; |
| 137 | result->i_fop = &smb_file_operations; |
| 138 | result->i_data.a_ops = &smb_file_aops; |
| 139 | } else if (S_ISDIR(result->i_mode)) { |
| 140 | if (server->opt.capabilities & SMB_CAP_UNIX) |
| 141 | result->i_op = &smb_dir_inode_operations_unix; |
| 142 | else |
| 143 | result->i_op = &smb_dir_inode_operations; |
| 144 | result->i_fop = &smb_dir_operations; |
| 145 | } else if (S_ISLNK(result->i_mode)) { |
| 146 | result->i_op = &smb_link_inode_operations; |
| 147 | } else { |
| 148 | init_special_inode(result, result->i_mode, fattr->f_rdev); |
| 149 | } |
| 150 | insert_inode_hash(result); |
| 151 | return result; |
| 152 | } |
| 153 | |
| 154 | /* |
| 155 | * Copy the inode data to a smb_fattr structure. |
| 156 | */ |
| 157 | void |
| 158 | smb_get_inode_attr(struct inode *inode, struct smb_fattr *fattr) |
| 159 | { |
| 160 | memset(fattr, 0, sizeof(struct smb_fattr)); |
| 161 | fattr->f_mode = inode->i_mode; |
| 162 | fattr->f_nlink = inode->i_nlink; |
| 163 | fattr->f_ino = inode->i_ino; |
| 164 | fattr->f_uid = inode->i_uid; |
| 165 | fattr->f_gid = inode->i_gid; |
| 166 | fattr->f_size = inode->i_size; |
| 167 | fattr->f_mtime = inode->i_mtime; |
| 168 | fattr->f_ctime = inode->i_ctime; |
| 169 | fattr->f_atime = inode->i_atime; |
| 170 | fattr->f_blksize= inode->i_blksize; |
| 171 | fattr->f_blocks = inode->i_blocks; |
| 172 | |
| 173 | fattr->attr = SMB_I(inode)->attr; |
| 174 | /* |
| 175 | * Keep the attributes in sync with the inode permissions. |
| 176 | */ |
| 177 | if (fattr->f_mode & S_IWUSR) |
| 178 | fattr->attr &= ~aRONLY; |
| 179 | else |
| 180 | fattr->attr |= aRONLY; |
| 181 | } |
| 182 | |
| 183 | /* |
| 184 | * Update the inode, possibly causing it to invalidate its pages if mtime/size |
| 185 | * is different from last time. |
| 186 | */ |
| 187 | void |
| 188 | smb_set_inode_attr(struct inode *inode, struct smb_fattr *fattr) |
| 189 | { |
| 190 | struct smb_inode_info *ei = SMB_I(inode); |
| 191 | |
| 192 | /* |
| 193 | * A size change should have a different mtime, or same mtime |
| 194 | * but different size. |
| 195 | */ |
| 196 | time_t last_time = inode->i_mtime.tv_sec; |
| 197 | loff_t last_sz = inode->i_size; |
| 198 | |
| 199 | inode->i_mode = fattr->f_mode; |
| 200 | inode->i_nlink = fattr->f_nlink; |
| 201 | inode->i_uid = fattr->f_uid; |
| 202 | inode->i_gid = fattr->f_gid; |
| 203 | inode->i_ctime = fattr->f_ctime; |
| 204 | inode->i_blksize= fattr->f_blksize; |
| 205 | inode->i_blocks = fattr->f_blocks; |
| 206 | inode->i_size = fattr->f_size; |
| 207 | inode->i_mtime = fattr->f_mtime; |
| 208 | inode->i_atime = fattr->f_atime; |
| 209 | ei->attr = fattr->attr; |
| 210 | |
| 211 | /* |
| 212 | * Update the "last time refreshed" field for revalidation. |
| 213 | */ |
| 214 | ei->oldmtime = jiffies; |
| 215 | |
| 216 | if (inode->i_mtime.tv_sec != last_time || inode->i_size != last_sz) { |
| 217 | VERBOSE("%ld changed, old=%ld, new=%ld, oz=%ld, nz=%ld\n", |
| 218 | inode->i_ino, |
| 219 | (long) last_time, (long) inode->i_mtime, |
| 220 | (long) last_sz, (long) inode->i_size); |
| 221 | |
| 222 | if (!S_ISDIR(inode->i_mode)) |
| 223 | invalidate_remote_inode(inode); |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | /* |
| 228 | * This is called if the connection has gone bad ... |
| 229 | * try to kill off all the current inodes. |
| 230 | */ |
| 231 | void |
| 232 | smb_invalidate_inodes(struct smb_sb_info *server) |
| 233 | { |
| 234 | VERBOSE("\n"); |
| 235 | shrink_dcache_sb(SB_of(server)); |
| 236 | invalidate_inodes(SB_of(server)); |
| 237 | } |
| 238 | |
| 239 | /* |
| 240 | * This is called to update the inode attributes after |
| 241 | * we've made changes to a file or directory. |
| 242 | */ |
| 243 | static int |
| 244 | smb_refresh_inode(struct dentry *dentry) |
| 245 | { |
| 246 | struct inode *inode = dentry->d_inode; |
| 247 | int error; |
| 248 | struct smb_fattr fattr; |
| 249 | |
| 250 | error = smb_proc_getattr(dentry, &fattr); |
| 251 | if (!error) { |
| 252 | smb_renew_times(dentry); |
| 253 | /* |
| 254 | * Check whether the type part of the mode changed, |
| 255 | * and don't update the attributes if it did. |
| 256 | * |
| 257 | * And don't dick with the root inode |
| 258 | */ |
| 259 | if (inode->i_ino == 2) |
| 260 | return error; |
| 261 | if (S_ISLNK(inode->i_mode)) |
| 262 | return error; /* VFS will deal with it */ |
| 263 | |
| 264 | if ((inode->i_mode & S_IFMT) == (fattr.f_mode & S_IFMT)) { |
| 265 | smb_set_inode_attr(inode, &fattr); |
| 266 | } else { |
| 267 | /* |
| 268 | * Big trouble! The inode has become a new object, |
| 269 | * so any operations attempted on it are invalid. |
| 270 | * |
| 271 | * To limit damage, mark the inode as bad so that |
| 272 | * subsequent lookup validations will fail. |
| 273 | */ |
| 274 | PARANOIA("%s/%s changed mode, %07o to %07o\n", |
| 275 | DENTRY_PATH(dentry), |
| 276 | inode->i_mode, fattr.f_mode); |
| 277 | |
| 278 | fattr.f_mode = inode->i_mode; /* save mode */ |
| 279 | make_bad_inode(inode); |
| 280 | inode->i_mode = fattr.f_mode; /* restore mode */ |
| 281 | /* |
| 282 | * No need to worry about unhashing the dentry: the |
| 283 | * lookup validation will see that the inode is bad. |
| 284 | * But we do want to invalidate the caches ... |
| 285 | */ |
| 286 | if (!S_ISDIR(inode->i_mode)) |
| 287 | invalidate_remote_inode(inode); |
| 288 | else |
| 289 | smb_invalid_dir_cache(inode); |
| 290 | error = -EIO; |
| 291 | } |
| 292 | } |
| 293 | return error; |
| 294 | } |
| 295 | |
| 296 | /* |
| 297 | * This is called when we want to check whether the inode |
| 298 | * has changed on the server. If it has changed, we must |
| 299 | * invalidate our local caches. |
| 300 | */ |
| 301 | int |
| 302 | smb_revalidate_inode(struct dentry *dentry) |
| 303 | { |
| 304 | struct smb_sb_info *s = server_from_dentry(dentry); |
| 305 | struct inode *inode = dentry->d_inode; |
| 306 | int error = 0; |
| 307 | |
| 308 | DEBUG1("smb_revalidate_inode\n"); |
| 309 | lock_kernel(); |
| 310 | |
| 311 | /* |
| 312 | * Check whether we've recently refreshed the inode. |
| 313 | */ |
| 314 | if (time_before(jiffies, SMB_I(inode)->oldmtime + SMB_MAX_AGE(s))) { |
| 315 | VERBOSE("up-to-date, ino=%ld, jiffies=%lu, oldtime=%lu\n", |
| 316 | inode->i_ino, jiffies, SMB_I(inode)->oldmtime); |
| 317 | goto out; |
| 318 | } |
| 319 | |
| 320 | error = smb_refresh_inode(dentry); |
| 321 | out: |
| 322 | unlock_kernel(); |
| 323 | return error; |
| 324 | } |
| 325 | |
| 326 | /* |
| 327 | * This routine is called when i_nlink == 0 and i_count goes to 0. |
| 328 | * All blocking cleanup operations need to go here to avoid races. |
| 329 | */ |
| 330 | static void |
| 331 | smb_delete_inode(struct inode *ino) |
| 332 | { |
| 333 | DEBUG1("ino=%ld\n", ino->i_ino); |
Mark Fasheh | fef2665 | 2005-09-09 13:01:31 -0700 | [diff] [blame] | 334 | truncate_inode_pages(&ino->i_data, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | lock_kernel(); |
| 336 | if (smb_close(ino)) |
| 337 | PARANOIA("could not close inode %ld\n", ino->i_ino); |
| 338 | unlock_kernel(); |
| 339 | clear_inode(ino); |
| 340 | } |
| 341 | |
| 342 | static struct option opts[] = { |
| 343 | { "version", 0, 'v' }, |
| 344 | { "win95", SMB_MOUNT_WIN95, 1 }, |
| 345 | { "oldattr", SMB_MOUNT_OLDATTR, 1 }, |
| 346 | { "dirattr", SMB_MOUNT_DIRATTR, 1 }, |
| 347 | { "case", SMB_MOUNT_CASE, 1 }, |
| 348 | { "uid", 0, 'u' }, |
| 349 | { "gid", 0, 'g' }, |
| 350 | { "file_mode", 0, 'f' }, |
| 351 | { "dir_mode", 0, 'd' }, |
| 352 | { "iocharset", 0, 'i' }, |
| 353 | { "codepage", 0, 'c' }, |
| 354 | { "ttl", 0, 't' }, |
| 355 | { NULL, 0, 0} |
| 356 | }; |
| 357 | |
| 358 | static int |
| 359 | parse_options(struct smb_mount_data_kernel *mnt, char *options) |
| 360 | { |
| 361 | int c; |
| 362 | unsigned long flags; |
| 363 | unsigned long value; |
| 364 | char *optarg; |
| 365 | char *optopt; |
| 366 | |
| 367 | flags = 0; |
| 368 | while ( (c = smb_getopt("smbfs", &options, opts, |
| 369 | &optopt, &optarg, &flags, &value)) > 0) { |
| 370 | |
| 371 | VERBOSE("'%s' -> '%s'\n", optopt, optarg ? optarg : "<none>"); |
| 372 | switch (c) { |
| 373 | case 1: |
| 374 | /* got a "flag" option */ |
| 375 | break; |
| 376 | case 'v': |
| 377 | if (value != SMB_MOUNT_VERSION) { |
| 378 | printk ("smbfs: Bad mount version %ld, expected %d\n", |
| 379 | value, SMB_MOUNT_VERSION); |
| 380 | return 0; |
| 381 | } |
| 382 | mnt->version = value; |
| 383 | break; |
| 384 | case 'u': |
| 385 | mnt->uid = value; |
| 386 | flags |= SMB_MOUNT_UID; |
| 387 | break; |
| 388 | case 'g': |
| 389 | mnt->gid = value; |
| 390 | flags |= SMB_MOUNT_GID; |
| 391 | break; |
| 392 | case 'f': |
| 393 | mnt->file_mode = (value & S_IRWXUGO) | S_IFREG; |
| 394 | flags |= SMB_MOUNT_FMODE; |
| 395 | break; |
| 396 | case 'd': |
| 397 | mnt->dir_mode = (value & S_IRWXUGO) | S_IFDIR; |
| 398 | flags |= SMB_MOUNT_DMODE; |
| 399 | break; |
| 400 | case 'i': |
| 401 | strlcpy(mnt->codepage.local_name, optarg, |
| 402 | SMB_NLS_MAXNAMELEN); |
| 403 | break; |
| 404 | case 'c': |
| 405 | strlcpy(mnt->codepage.remote_name, optarg, |
| 406 | SMB_NLS_MAXNAMELEN); |
| 407 | break; |
| 408 | case 't': |
| 409 | mnt->ttl = value; |
| 410 | break; |
| 411 | default: |
| 412 | printk ("smbfs: Unrecognized mount option %s\n", |
| 413 | optopt); |
| 414 | return -1; |
| 415 | } |
| 416 | } |
| 417 | mnt->flags = flags; |
| 418 | return c; |
| 419 | } |
| 420 | |
| 421 | /* |
| 422 | * smb_show_options() is for displaying mount options in /proc/mounts. |
| 423 | * It tries to avoid showing settings that were not changed from their |
| 424 | * defaults. |
| 425 | */ |
| 426 | static int |
| 427 | smb_show_options(struct seq_file *s, struct vfsmount *m) |
| 428 | { |
| 429 | struct smb_mount_data_kernel *mnt = SMB_SB(m->mnt_sb)->mnt; |
| 430 | int i; |
| 431 | |
| 432 | for (i = 0; opts[i].name != NULL; i++) |
| 433 | if (mnt->flags & opts[i].flag) |
| 434 | seq_printf(s, ",%s", opts[i].name); |
| 435 | |
| 436 | if (mnt->flags & SMB_MOUNT_UID) |
| 437 | seq_printf(s, ",uid=%d", mnt->uid); |
| 438 | if (mnt->flags & SMB_MOUNT_GID) |
| 439 | seq_printf(s, ",gid=%d", mnt->gid); |
| 440 | if (mnt->mounted_uid != 0) |
| 441 | seq_printf(s, ",mounted_uid=%d", mnt->mounted_uid); |
| 442 | |
| 443 | /* |
| 444 | * Defaults for file_mode and dir_mode are unknown to us; they |
| 445 | * depend on the current umask of the user doing the mount. |
| 446 | */ |
| 447 | if (mnt->flags & SMB_MOUNT_FMODE) |
| 448 | seq_printf(s, ",file_mode=%04o", mnt->file_mode & S_IRWXUGO); |
| 449 | if (mnt->flags & SMB_MOUNT_DMODE) |
| 450 | seq_printf(s, ",dir_mode=%04o", mnt->dir_mode & S_IRWXUGO); |
| 451 | |
| 452 | if (strcmp(mnt->codepage.local_name, CONFIG_NLS_DEFAULT)) |
| 453 | seq_printf(s, ",iocharset=%s", mnt->codepage.local_name); |
| 454 | if (strcmp(mnt->codepage.remote_name, SMB_NLS_REMOTE)) |
| 455 | seq_printf(s, ",codepage=%s", mnt->codepage.remote_name); |
| 456 | |
| 457 | if (mnt->ttl != SMB_TTL_DEFAULT) |
| 458 | seq_printf(s, ",ttl=%d", mnt->ttl); |
| 459 | |
| 460 | return 0; |
| 461 | } |
| 462 | |
| 463 | static void |
| 464 | smb_unload_nls(struct smb_sb_info *server) |
| 465 | { |
| 466 | if (server->remote_nls) { |
| 467 | unload_nls(server->remote_nls); |
| 468 | server->remote_nls = NULL; |
| 469 | } |
| 470 | if (server->local_nls) { |
| 471 | unload_nls(server->local_nls); |
| 472 | server->local_nls = NULL; |
| 473 | } |
| 474 | } |
| 475 | |
| 476 | static void |
| 477 | smb_put_super(struct super_block *sb) |
| 478 | { |
| 479 | struct smb_sb_info *server = SMB_SB(sb); |
| 480 | |
| 481 | smb_lock_server(server); |
| 482 | server->state = CONN_INVALID; |
| 483 | smbiod_unregister_server(server); |
| 484 | |
| 485 | smb_close_socket(server); |
| 486 | |
| 487 | if (server->conn_pid) |
| 488 | kill_proc(server->conn_pid, SIGTERM, 1); |
| 489 | |
| 490 | smb_kfree(server->ops); |
| 491 | smb_unload_nls(server); |
| 492 | sb->s_fs_info = NULL; |
| 493 | smb_unlock_server(server); |
| 494 | smb_kfree(server); |
| 495 | } |
| 496 | |
| 497 | static int smb_fill_super(struct super_block *sb, void *raw_data, int silent) |
| 498 | { |
| 499 | struct smb_sb_info *server; |
| 500 | struct smb_mount_data_kernel *mnt; |
| 501 | struct smb_mount_data *oldmnt; |
| 502 | struct inode *root_inode; |
| 503 | struct smb_fattr root; |
| 504 | int ver; |
| 505 | void *mem; |
| 506 | |
| 507 | if (!raw_data) |
| 508 | goto out_no_data; |
| 509 | |
| 510 | oldmnt = (struct smb_mount_data *) raw_data; |
| 511 | ver = oldmnt->version; |
| 512 | if (ver != SMB_MOUNT_OLDVERSION && cpu_to_be32(ver) != SMB_MOUNT_ASCII) |
| 513 | goto out_wrong_data; |
| 514 | |
| 515 | sb->s_flags |= MS_NODIRATIME; |
| 516 | sb->s_blocksize = 1024; /* Eh... Is this correct? */ |
| 517 | sb->s_blocksize_bits = 10; |
| 518 | sb->s_magic = SMB_SUPER_MAGIC; |
| 519 | sb->s_op = &smb_sops; |
| 520 | sb->s_time_gran = 100; |
| 521 | |
| 522 | server = smb_kmalloc(sizeof(struct smb_sb_info), GFP_KERNEL); |
| 523 | if (!server) |
| 524 | goto out_no_server; |
| 525 | sb->s_fs_info = server; |
| 526 | memset(server, 0, sizeof(struct smb_sb_info)); |
| 527 | |
| 528 | server->super_block = sb; |
| 529 | server->mnt = NULL; |
| 530 | server->sock_file = NULL; |
| 531 | init_waitqueue_head(&server->conn_wq); |
| 532 | init_MUTEX(&server->sem); |
| 533 | INIT_LIST_HEAD(&server->entry); |
| 534 | INIT_LIST_HEAD(&server->xmitq); |
| 535 | INIT_LIST_HEAD(&server->recvq); |
| 536 | server->conn_error = 0; |
| 537 | server->conn_pid = 0; |
| 538 | server->state = CONN_INVALID; /* no connection yet */ |
| 539 | server->generation = 0; |
| 540 | |
| 541 | /* Allocate the global temp buffer and some superblock helper structs */ |
| 542 | /* FIXME: move these to the smb_sb_info struct */ |
| 543 | VERBOSE("alloc chunk = %d\n", sizeof(struct smb_ops) + |
| 544 | sizeof(struct smb_mount_data_kernel)); |
| 545 | mem = smb_kmalloc(sizeof(struct smb_ops) + |
| 546 | sizeof(struct smb_mount_data_kernel), GFP_KERNEL); |
| 547 | if (!mem) |
| 548 | goto out_no_mem; |
| 549 | |
| 550 | server->ops = mem; |
| 551 | smb_install_null_ops(server->ops); |
| 552 | server->mnt = mem + sizeof(struct smb_ops); |
| 553 | |
| 554 | /* Setup NLS stuff */ |
| 555 | server->remote_nls = NULL; |
| 556 | server->local_nls = NULL; |
| 557 | |
| 558 | mnt = server->mnt; |
| 559 | |
| 560 | memset(mnt, 0, sizeof(struct smb_mount_data_kernel)); |
| 561 | strlcpy(mnt->codepage.local_name, CONFIG_NLS_DEFAULT, |
| 562 | SMB_NLS_MAXNAMELEN); |
| 563 | strlcpy(mnt->codepage.remote_name, SMB_NLS_REMOTE, |
| 564 | SMB_NLS_MAXNAMELEN); |
| 565 | |
| 566 | mnt->ttl = SMB_TTL_DEFAULT; |
| 567 | if (ver == SMB_MOUNT_OLDVERSION) { |
| 568 | mnt->version = oldmnt->version; |
| 569 | |
| 570 | SET_UID(mnt->uid, oldmnt->uid); |
| 571 | SET_GID(mnt->gid, oldmnt->gid); |
| 572 | |
| 573 | mnt->file_mode = (oldmnt->file_mode & S_IRWXUGO) | S_IFREG; |
| 574 | mnt->dir_mode = (oldmnt->dir_mode & S_IRWXUGO) | S_IFDIR; |
| 575 | |
| 576 | mnt->flags = (oldmnt->file_mode >> 9) | SMB_MOUNT_UID | |
| 577 | SMB_MOUNT_GID | SMB_MOUNT_FMODE | SMB_MOUNT_DMODE; |
| 578 | } else { |
| 579 | mnt->file_mode = S_IRWXU | S_IRGRP | S_IXGRP | |
| 580 | S_IROTH | S_IXOTH | S_IFREG; |
| 581 | mnt->dir_mode = S_IRWXU | S_IRGRP | S_IXGRP | |
| 582 | S_IROTH | S_IXOTH | S_IFDIR; |
| 583 | if (parse_options(mnt, raw_data)) |
| 584 | goto out_bad_option; |
| 585 | } |
| 586 | mnt->mounted_uid = current->uid; |
| 587 | smb_setcodepage(server, &mnt->codepage); |
| 588 | |
| 589 | /* |
| 590 | * Display the enabled options |
| 591 | * Note: smb_proc_getattr uses these in 2.4 (but was changed in 2.2) |
| 592 | */ |
| 593 | if (mnt->flags & SMB_MOUNT_OLDATTR) |
| 594 | printk("SMBFS: Using core getattr (Win 95 speedup)\n"); |
| 595 | else if (mnt->flags & SMB_MOUNT_DIRATTR) |
| 596 | printk("SMBFS: Using dir ff getattr\n"); |
| 597 | |
| 598 | if (smbiod_register_server(server) < 0) { |
| 599 | printk(KERN_ERR "smbfs: failed to start smbiod\n"); |
| 600 | goto out_no_smbiod; |
| 601 | } |
| 602 | |
| 603 | /* |
| 604 | * Keep the super block locked while we get the root inode. |
| 605 | */ |
| 606 | smb_init_root_dirent(server, &root, sb); |
| 607 | root_inode = smb_iget(sb, &root); |
| 608 | if (!root_inode) |
| 609 | goto out_no_root; |
| 610 | |
| 611 | sb->s_root = d_alloc_root(root_inode); |
| 612 | if (!sb->s_root) |
| 613 | goto out_no_root; |
| 614 | |
| 615 | smb_new_dentry(sb->s_root); |
| 616 | |
| 617 | return 0; |
| 618 | |
| 619 | out_no_root: |
| 620 | iput(root_inode); |
| 621 | out_no_smbiod: |
| 622 | smb_unload_nls(server); |
| 623 | out_bad_option: |
| 624 | smb_kfree(mem); |
| 625 | out_no_mem: |
| 626 | if (!server->mnt) |
| 627 | printk(KERN_ERR "smb_fill_super: allocation failure\n"); |
| 628 | sb->s_fs_info = NULL; |
| 629 | smb_kfree(server); |
| 630 | goto out_fail; |
| 631 | out_wrong_data: |
| 632 | printk(KERN_ERR "smbfs: mount_data version %d is not supported\n", ver); |
| 633 | goto out_fail; |
| 634 | out_no_data: |
| 635 | printk(KERN_ERR "smb_fill_super: missing data argument\n"); |
| 636 | out_fail: |
| 637 | return -EINVAL; |
| 638 | out_no_server: |
| 639 | printk(KERN_ERR "smb_fill_super: cannot allocate struct smb_sb_info\n"); |
| 640 | return -ENOMEM; |
| 641 | } |
| 642 | |
| 643 | static int |
| 644 | smb_statfs(struct super_block *sb, struct kstatfs *buf) |
| 645 | { |
| 646 | int result; |
| 647 | |
| 648 | lock_kernel(); |
| 649 | |
| 650 | result = smb_proc_dskattr(sb, buf); |
| 651 | |
| 652 | unlock_kernel(); |
| 653 | |
| 654 | buf->f_type = SMB_SUPER_MAGIC; |
| 655 | buf->f_namelen = SMB_MAXPATHLEN; |
| 656 | return result; |
| 657 | } |
| 658 | |
| 659 | int smb_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
| 660 | { |
| 661 | int err = smb_revalidate_inode(dentry); |
| 662 | if (!err) |
| 663 | generic_fillattr(dentry->d_inode, stat); |
| 664 | return err; |
| 665 | } |
| 666 | |
| 667 | int |
| 668 | smb_notify_change(struct dentry *dentry, struct iattr *attr) |
| 669 | { |
| 670 | struct inode *inode = dentry->d_inode; |
| 671 | struct smb_sb_info *server = server_from_dentry(dentry); |
| 672 | unsigned int mask = (S_IFREG | S_IFDIR | S_IRWXUGO); |
| 673 | int error, changed, refresh = 0; |
| 674 | struct smb_fattr fattr; |
| 675 | |
| 676 | lock_kernel(); |
| 677 | |
| 678 | error = smb_revalidate_inode(dentry); |
| 679 | if (error) |
| 680 | goto out; |
| 681 | |
| 682 | if ((error = inode_change_ok(inode, attr)) < 0) |
| 683 | goto out; |
| 684 | |
| 685 | error = -EPERM; |
| 686 | if ((attr->ia_valid & ATTR_UID) && (attr->ia_uid != server->mnt->uid)) |
| 687 | goto out; |
| 688 | |
| 689 | if ((attr->ia_valid & ATTR_GID) && (attr->ia_uid != server->mnt->gid)) |
| 690 | goto out; |
| 691 | |
| 692 | if ((attr->ia_valid & ATTR_MODE) && (attr->ia_mode & ~mask)) |
| 693 | goto out; |
| 694 | |
| 695 | if ((attr->ia_valid & ATTR_SIZE) != 0) { |
| 696 | VERBOSE("changing %s/%s, old size=%ld, new size=%ld\n", |
| 697 | DENTRY_PATH(dentry), |
| 698 | (long) inode->i_size, (long) attr->ia_size); |
| 699 | |
OGAWA Hirofumi | 28fd129 | 2006-01-08 01:02:14 -0800 | [diff] [blame^] | 700 | filemap_write_and_wait(inode->i_mapping); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | |
| 702 | error = smb_open(dentry, O_WRONLY); |
| 703 | if (error) |
| 704 | goto out; |
| 705 | error = server->ops->truncate(inode, attr->ia_size); |
| 706 | if (error) |
| 707 | goto out; |
| 708 | error = vmtruncate(inode, attr->ia_size); |
| 709 | if (error) |
| 710 | goto out; |
| 711 | refresh = 1; |
| 712 | } |
| 713 | |
| 714 | if (server->opt.capabilities & SMB_CAP_UNIX) { |
| 715 | /* For now we don't want to set the size with setattr_unix */ |
| 716 | attr->ia_valid &= ~ATTR_SIZE; |
| 717 | /* FIXME: only call if we actually want to set something? */ |
| 718 | error = smb_proc_setattr_unix(dentry, attr, 0, 0); |
| 719 | if (!error) |
| 720 | refresh = 1; |
| 721 | |
| 722 | goto out; |
| 723 | } |
| 724 | |
| 725 | /* |
| 726 | * Initialize the fattr and check for changed fields. |
| 727 | * Note: CTIME under SMB is creation time rather than |
| 728 | * change time, so we don't attempt to change it. |
| 729 | */ |
| 730 | smb_get_inode_attr(inode, &fattr); |
| 731 | |
| 732 | changed = 0; |
| 733 | if ((attr->ia_valid & ATTR_MTIME) != 0) { |
| 734 | fattr.f_mtime = attr->ia_mtime; |
| 735 | changed = 1; |
| 736 | } |
| 737 | if ((attr->ia_valid & ATTR_ATIME) != 0) { |
| 738 | fattr.f_atime = attr->ia_atime; |
| 739 | /* Earlier protocols don't have an access time */ |
| 740 | if (server->opt.protocol >= SMB_PROTOCOL_LANMAN2) |
| 741 | changed = 1; |
| 742 | } |
| 743 | if (changed) { |
| 744 | error = smb_proc_settime(dentry, &fattr); |
| 745 | if (error) |
| 746 | goto out; |
| 747 | refresh = 1; |
| 748 | } |
| 749 | |
| 750 | /* |
| 751 | * Check for mode changes ... we're extremely limited in |
| 752 | * what can be set for SMB servers: just the read-only bit. |
| 753 | */ |
| 754 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
| 755 | VERBOSE("%s/%s mode change, old=%x, new=%x\n", |
| 756 | DENTRY_PATH(dentry), fattr.f_mode, attr->ia_mode); |
| 757 | changed = 0; |
| 758 | if (attr->ia_mode & S_IWUSR) { |
| 759 | if (fattr.attr & aRONLY) { |
| 760 | fattr.attr &= ~aRONLY; |
| 761 | changed = 1; |
| 762 | } |
| 763 | } else { |
| 764 | if (!(fattr.attr & aRONLY)) { |
| 765 | fattr.attr |= aRONLY; |
| 766 | changed = 1; |
| 767 | } |
| 768 | } |
| 769 | if (changed) { |
| 770 | error = smb_proc_setattr(dentry, &fattr); |
| 771 | if (error) |
| 772 | goto out; |
| 773 | refresh = 1; |
| 774 | } |
| 775 | } |
| 776 | error = 0; |
| 777 | |
| 778 | out: |
| 779 | if (refresh) |
| 780 | smb_refresh_inode(dentry); |
| 781 | unlock_kernel(); |
| 782 | return error; |
| 783 | } |
| 784 | |
| 785 | #ifdef DEBUG_SMB_MALLOC |
| 786 | int smb_malloced; |
| 787 | int smb_current_kmalloced; |
| 788 | int smb_current_vmalloced; |
| 789 | #endif |
| 790 | |
| 791 | static struct super_block *smb_get_sb(struct file_system_type *fs_type, |
| 792 | int flags, const char *dev_name, void *data) |
| 793 | { |
| 794 | return get_sb_nodev(fs_type, flags, data, smb_fill_super); |
| 795 | } |
| 796 | |
| 797 | static struct file_system_type smb_fs_type = { |
| 798 | .owner = THIS_MODULE, |
| 799 | .name = "smbfs", |
| 800 | .get_sb = smb_get_sb, |
| 801 | .kill_sb = kill_anon_super, |
| 802 | .fs_flags = FS_BINARY_MOUNTDATA, |
| 803 | }; |
| 804 | |
| 805 | static int __init init_smb_fs(void) |
| 806 | { |
| 807 | int err; |
| 808 | DEBUG1("registering ...\n"); |
| 809 | |
| 810 | #ifdef DEBUG_SMB_MALLOC |
| 811 | smb_malloced = 0; |
| 812 | smb_current_kmalloced = 0; |
| 813 | smb_current_vmalloced = 0; |
| 814 | #endif |
| 815 | |
| 816 | err = init_inodecache(); |
| 817 | if (err) |
| 818 | goto out_inode; |
| 819 | err = smb_init_request_cache(); |
| 820 | if (err) |
| 821 | goto out_request; |
| 822 | err = register_filesystem(&smb_fs_type); |
| 823 | if (err) |
| 824 | goto out; |
| 825 | return 0; |
| 826 | out: |
| 827 | smb_destroy_request_cache(); |
| 828 | out_request: |
| 829 | destroy_inodecache(); |
| 830 | out_inode: |
| 831 | return err; |
| 832 | } |
| 833 | |
| 834 | static void __exit exit_smb_fs(void) |
| 835 | { |
| 836 | DEBUG1("unregistering ...\n"); |
| 837 | unregister_filesystem(&smb_fs_type); |
| 838 | smb_destroy_request_cache(); |
| 839 | destroy_inodecache(); |
| 840 | #ifdef DEBUG_SMB_MALLOC |
| 841 | printk(KERN_DEBUG "smb_malloced: %d\n", smb_malloced); |
| 842 | printk(KERN_DEBUG "smb_current_kmalloced: %d\n",smb_current_kmalloced); |
| 843 | printk(KERN_DEBUG "smb_current_vmalloced: %d\n",smb_current_vmalloced); |
| 844 | #endif |
| 845 | } |
| 846 | |
| 847 | module_init(init_smb_fs) |
| 848 | module_exit(exit_smb_fs) |
| 849 | MODULE_LICENSE("GPL"); |