| 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * (C) 2001 Clemson University and The University of Chicago |
| 4 | * |
| 5 | * See COPYING in top-level directory. |
| 6 | */ |
| 7 | |
| 8 | #include "protocol.h" |
| 9 | #include "orangefs-kernel.h" |
| 10 | #include "orangefs-bufmap.h" |
| 11 | |
| 12 | #include <linux/parser.h> |
| 13 | #include <linux/hashtable.h> |
| 14 | #include <linux/seq_file.h> |
| 15 | |
| 16 | /* a cache for orangefs-inode objects (i.e. orangefs inode private data) */ |
| 17 | static struct kmem_cache *orangefs_inode_cache; |
| 18 | |
| 19 | /* list for storing orangefs specific superblocks in use */ |
| 20 | LIST_HEAD(orangefs_superblocks); |
| 21 | |
| 22 | DEFINE_SPINLOCK(orangefs_superblocks_lock); |
| 23 | |
| 24 | enum { |
| 25 | Opt_intr, |
| 26 | Opt_acl, |
| 27 | Opt_local_lock, |
| 28 | |
| 29 | Opt_err |
| 30 | }; |
| 31 | |
| 32 | static const match_table_t tokens = { |
| 33 | { Opt_acl, "acl" }, |
| 34 | { Opt_intr, "intr" }, |
| 35 | { Opt_local_lock, "local_lock" }, |
| 36 | { Opt_err, NULL } |
| 37 | }; |
| 38 | |
| 39 | uint64_t orangefs_features; |
| 40 | |
| 41 | static int orangefs_show_options(struct seq_file *m, struct dentry *root) |
| 42 | { |
| 43 | struct orangefs_sb_info_s *orangefs_sb = ORANGEFS_SB(root->d_sb); |
| 44 | |
| 45 | if (root->d_sb->s_flags & SB_POSIXACL) |
| 46 | seq_puts(m, ",acl"); |
| 47 | if (orangefs_sb->flags & ORANGEFS_OPT_INTR) |
| 48 | seq_puts(m, ",intr"); |
| 49 | if (orangefs_sb->flags & ORANGEFS_OPT_LOCAL_LOCK) |
| 50 | seq_puts(m, ",local_lock"); |
| 51 | return 0; |
| 52 | } |
| 53 | |
| 54 | static int parse_mount_options(struct super_block *sb, char *options, |
| 55 | int silent) |
| 56 | { |
| 57 | struct orangefs_sb_info_s *orangefs_sb = ORANGEFS_SB(sb); |
| 58 | substring_t args[MAX_OPT_ARGS]; |
| 59 | char *p; |
| 60 | |
| 61 | /* |
| 62 | * Force any potential flags that might be set from the mount |
| 63 | * to zero, ie, initialize to unset. |
| 64 | */ |
| 65 | sb->s_flags &= ~SB_POSIXACL; |
| 66 | orangefs_sb->flags &= ~ORANGEFS_OPT_INTR; |
| 67 | orangefs_sb->flags &= ~ORANGEFS_OPT_LOCAL_LOCK; |
| 68 | |
| 69 | while ((p = strsep(&options, ",")) != NULL) { |
| 70 | int token; |
| 71 | |
| 72 | if (!*p) |
| 73 | continue; |
| 74 | |
| 75 | token = match_token(p, tokens, args); |
| 76 | switch (token) { |
| 77 | case Opt_acl: |
| 78 | sb->s_flags |= SB_POSIXACL; |
| 79 | break; |
| 80 | case Opt_intr: |
| 81 | orangefs_sb->flags |= ORANGEFS_OPT_INTR; |
| 82 | break; |
| 83 | case Opt_local_lock: |
| 84 | orangefs_sb->flags |= ORANGEFS_OPT_LOCAL_LOCK; |
| 85 | break; |
| 86 | default: |
| 87 | goto fail; |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | return 0; |
| 92 | fail: |
| 93 | if (!silent) |
| 94 | gossip_err("Error: mount option [%s] is not supported.\n", p); |
| 95 | return -EINVAL; |
| 96 | } |
| 97 | |
| 98 | static void orangefs_inode_cache_ctor(void *req) |
| 99 | { |
| 100 | struct orangefs_inode_s *orangefs_inode = req; |
| 101 | |
| 102 | inode_init_once(&orangefs_inode->vfs_inode); |
| 103 | init_rwsem(&orangefs_inode->xattr_sem); |
| 104 | } |
| 105 | |
| 106 | static struct inode *orangefs_alloc_inode(struct super_block *sb) |
| 107 | { |
| 108 | struct orangefs_inode_s *orangefs_inode; |
| 109 | |
| 110 | orangefs_inode = alloc_inode_sb(sb, orangefs_inode_cache, GFP_KERNEL); |
| 111 | if (!orangefs_inode) |
| 112 | return NULL; |
| 113 | |
| 114 | /* |
| 115 | * We want to clear everything except for rw_semaphore and the |
| 116 | * vfs_inode. |
| 117 | */ |
| 118 | memset(&orangefs_inode->refn.khandle, 0, 16); |
| 119 | orangefs_inode->refn.fs_id = ORANGEFS_FS_ID_NULL; |
| 120 | orangefs_inode->last_failed_block_index_read = 0; |
| 121 | memset(orangefs_inode->link_target, 0, sizeof(orangefs_inode->link_target)); |
| 122 | |
| 123 | gossip_debug(GOSSIP_SUPER_DEBUG, |
| 124 | "orangefs_alloc_inode: allocated %p\n", |
| 125 | &orangefs_inode->vfs_inode); |
| 126 | return &orangefs_inode->vfs_inode; |
| 127 | } |
| 128 | |
| 129 | static void orangefs_free_inode(struct inode *inode) |
| 130 | { |
| 131 | struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); |
| 132 | struct orangefs_cached_xattr *cx; |
| 133 | struct hlist_node *tmp; |
| 134 | int i; |
| 135 | |
| 136 | hash_for_each_safe(orangefs_inode->xattr_cache, i, tmp, cx, node) { |
| 137 | hlist_del(&cx->node); |
| 138 | kfree(cx); |
| 139 | } |
| 140 | |
| 141 | kmem_cache_free(orangefs_inode_cache, orangefs_inode); |
| 142 | } |
| 143 | |
| 144 | static void orangefs_destroy_inode(struct inode *inode) |
| 145 | { |
| 146 | struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); |
| 147 | |
| 148 | gossip_debug(GOSSIP_SUPER_DEBUG, |
| 149 | "%s: deallocated %p destroying inode %pU\n", |
| 150 | __func__, orangefs_inode, get_khandle_from_ino(inode)); |
| 151 | } |
| 152 | |
| 153 | static int orangefs_write_inode(struct inode *inode, |
| 154 | struct writeback_control *wbc) |
| 155 | { |
| 156 | gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_write_inode\n"); |
| 157 | return orangefs_inode_setattr(inode); |
| 158 | } |
| 159 | |
| 160 | /* |
| 161 | * NOTE: information filled in here is typically reflected in the |
| 162 | * output of the system command 'df' |
| 163 | */ |
| 164 | static int orangefs_statfs(struct dentry *dentry, struct kstatfs *buf) |
| 165 | { |
| 166 | int ret = -ENOMEM; |
| 167 | struct orangefs_kernel_op_s *new_op = NULL; |
| 168 | int flags = 0; |
| 169 | struct super_block *sb = NULL; |
| 170 | |
| 171 | sb = dentry->d_sb; |
| 172 | |
| 173 | gossip_debug(GOSSIP_SUPER_DEBUG, |
| 174 | "%s: called on sb %p (fs_id is %d)\n", |
| 175 | __func__, |
| 176 | sb, |
| 177 | (int)(ORANGEFS_SB(sb)->fs_id)); |
| 178 | |
| 179 | new_op = op_alloc(ORANGEFS_VFS_OP_STATFS); |
| 180 | if (!new_op) |
| 181 | return ret; |
| 182 | new_op->upcall.req.statfs.fs_id = ORANGEFS_SB(sb)->fs_id; |
| 183 | |
| 184 | if (ORANGEFS_SB(sb)->flags & ORANGEFS_OPT_INTR) |
| 185 | flags = ORANGEFS_OP_INTERRUPTIBLE; |
| 186 | |
| 187 | ret = service_operation(new_op, "orangefs_statfs", flags); |
| 188 | |
| 189 | if (new_op->downcall.status < 0) |
| 190 | goto out_op_release; |
| 191 | |
| 192 | gossip_debug(GOSSIP_SUPER_DEBUG, |
| 193 | "%s: got %ld blocks available | " |
| 194 | "%ld blocks total | %ld block size | " |
| 195 | "%ld files total | %ld files avail\n", |
| 196 | __func__, |
| 197 | (long)new_op->downcall.resp.statfs.blocks_avail, |
| 198 | (long)new_op->downcall.resp.statfs.blocks_total, |
| 199 | (long)new_op->downcall.resp.statfs.block_size, |
| 200 | (long)new_op->downcall.resp.statfs.files_total, |
| 201 | (long)new_op->downcall.resp.statfs.files_avail); |
| 202 | |
| 203 | buf->f_type = sb->s_magic; |
| 204 | memcpy(&buf->f_fsid, &ORANGEFS_SB(sb)->fs_id, sizeof(buf->f_fsid)); |
| 205 | buf->f_bsize = new_op->downcall.resp.statfs.block_size; |
| 206 | buf->f_namelen = ORANGEFS_NAME_MAX; |
| 207 | |
| 208 | buf->f_blocks = (sector_t) new_op->downcall.resp.statfs.blocks_total; |
| 209 | buf->f_bfree = (sector_t) new_op->downcall.resp.statfs.blocks_avail; |
| 210 | buf->f_bavail = (sector_t) new_op->downcall.resp.statfs.blocks_avail; |
| 211 | buf->f_files = (sector_t) new_op->downcall.resp.statfs.files_total; |
| 212 | buf->f_ffree = (sector_t) new_op->downcall.resp.statfs.files_avail; |
| 213 | buf->f_frsize = 0; |
| 214 | |
| 215 | out_op_release: |
| 216 | op_release(new_op); |
| 217 | gossip_debug(GOSSIP_SUPER_DEBUG, "%s: returning %d\n", __func__, ret); |
| 218 | return ret; |
| 219 | } |
| 220 | |
| 221 | /* |
| 222 | * Remount as initiated by VFS layer. We just need to reparse the mount |
| 223 | * options, no need to signal pvfs2-client-core about it. |
| 224 | */ |
| 225 | static int orangefs_remount_fs(struct super_block *sb, int *flags, char *data) |
| 226 | { |
| 227 | gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_remount_fs: called\n"); |
| 228 | return parse_mount_options(sb, data, 1); |
| 229 | } |
| 230 | |
| 231 | /* |
| 232 | * Remount as initiated by pvfs2-client-core on restart. This is used to |
| 233 | * repopulate mount information left from previous pvfs2-client-core. |
| 234 | * |
| 235 | * the idea here is that given a valid superblock, we're |
| 236 | * re-initializing the user space client with the initial mount |
| 237 | * information specified when the super block was first initialized. |
| 238 | * this is very different than the first initialization/creation of a |
| 239 | * superblock. we use the special service_priority_operation to make |
| 240 | * sure that the mount gets ahead of any other pending operation that |
| 241 | * is waiting for servicing. this means that the pvfs2-client won't |
| 242 | * fail to start several times for all other pending operations before |
| 243 | * the client regains all of the mount information from us. |
| 244 | * NOTE: this function assumes that the request_mutex is already acquired! |
| 245 | */ |
| 246 | int orangefs_remount(struct orangefs_sb_info_s *orangefs_sb) |
| 247 | { |
| 248 | struct orangefs_kernel_op_s *new_op; |
| 249 | int ret = -EINVAL; |
| 250 | |
| 251 | gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_remount: called\n"); |
| 252 | |
| 253 | new_op = op_alloc(ORANGEFS_VFS_OP_FS_MOUNT); |
| 254 | if (!new_op) |
| 255 | return -ENOMEM; |
| 256 | strncpy(new_op->upcall.req.fs_mount.orangefs_config_server, |
| 257 | orangefs_sb->devname, |
| 258 | ORANGEFS_MAX_SERVER_ADDR_LEN); |
| 259 | |
| 260 | gossip_debug(GOSSIP_SUPER_DEBUG, |
| 261 | "Attempting ORANGEFS Remount via host %s\n", |
| 262 | new_op->upcall.req.fs_mount.orangefs_config_server); |
| 263 | |
| 264 | /* |
| 265 | * we assume that the calling function has already acquired the |
| 266 | * request_mutex to prevent other operations from bypassing |
| 267 | * this one |
| 268 | */ |
| 269 | ret = service_operation(new_op, "orangefs_remount", |
| 270 | ORANGEFS_OP_PRIORITY | ORANGEFS_OP_NO_MUTEX); |
| 271 | gossip_debug(GOSSIP_SUPER_DEBUG, |
| 272 | "orangefs_remount: mount got return value of %d\n", |
| 273 | ret); |
| 274 | if (ret == 0) { |
| 275 | /* |
| 276 | * store the id assigned to this sb -- it's just a |
| 277 | * short-lived mapping that the system interface uses |
| 278 | * to map this superblock to a particular mount entry |
| 279 | */ |
| 280 | orangefs_sb->id = new_op->downcall.resp.fs_mount.id; |
| 281 | orangefs_sb->mount_pending = 0; |
| 282 | } |
| 283 | |
| 284 | op_release(new_op); |
| 285 | |
| 286 | if (orangefs_userspace_version >= 20906) { |
| 287 | new_op = op_alloc(ORANGEFS_VFS_OP_FEATURES); |
| 288 | if (!new_op) |
| 289 | return -ENOMEM; |
| 290 | new_op->upcall.req.features.features = 0; |
| 291 | ret = service_operation(new_op, "orangefs_features", |
| 292 | ORANGEFS_OP_PRIORITY | ORANGEFS_OP_NO_MUTEX); |
| 293 | if (!ret) |
| 294 | orangefs_features = |
| 295 | new_op->downcall.resp.features.features; |
| 296 | else |
| 297 | orangefs_features = 0; |
| 298 | op_release(new_op); |
| 299 | } else { |
| 300 | orangefs_features = 0; |
| 301 | } |
| 302 | |
| 303 | return ret; |
| 304 | } |
| 305 | |
| 306 | int fsid_key_table_initialize(void) |
| 307 | { |
| 308 | return 0; |
| 309 | } |
| 310 | |
| 311 | void fsid_key_table_finalize(void) |
| 312 | { |
| 313 | } |
| 314 | |
| 315 | static const struct super_operations orangefs_s_ops = { |
| 316 | .alloc_inode = orangefs_alloc_inode, |
| 317 | .free_inode = orangefs_free_inode, |
| 318 | .destroy_inode = orangefs_destroy_inode, |
| 319 | .write_inode = orangefs_write_inode, |
| 320 | .drop_inode = generic_delete_inode, |
| 321 | .statfs = orangefs_statfs, |
| 322 | .remount_fs = orangefs_remount_fs, |
| 323 | .show_options = orangefs_show_options, |
| 324 | }; |
| 325 | |
| 326 | static struct dentry *orangefs_fh_to_dentry(struct super_block *sb, |
| 327 | struct fid *fid, |
| 328 | int fh_len, |
| 329 | int fh_type) |
| 330 | { |
| 331 | struct orangefs_object_kref refn; |
| 332 | |
| 333 | if (fh_len < 5 || fh_type > 2) |
| 334 | return NULL; |
| 335 | |
| 336 | ORANGEFS_khandle_from(&(refn.khandle), fid->raw, 16); |
| 337 | refn.fs_id = (u32) fid->raw[4]; |
| 338 | gossip_debug(GOSSIP_SUPER_DEBUG, |
| 339 | "fh_to_dentry: handle %pU, fs_id %d\n", |
| 340 | &refn.khandle, |
| 341 | refn.fs_id); |
| 342 | |
| 343 | return d_obtain_alias(orangefs_iget(sb, &refn)); |
| 344 | } |
| 345 | |
| 346 | static int orangefs_encode_fh(struct inode *inode, |
| 347 | __u32 *fh, |
| 348 | int *max_len, |
| 349 | struct inode *parent) |
| 350 | { |
| 351 | int len = parent ? 10 : 5; |
| 352 | int type = 1; |
| 353 | struct orangefs_object_kref refn; |
| 354 | |
| 355 | if (*max_len < len) { |
| 356 | gossip_err("fh buffer is too small for encoding\n"); |
| 357 | *max_len = len; |
| 358 | type = 255; |
| 359 | goto out; |
| 360 | } |
| 361 | |
| 362 | refn = ORANGEFS_I(inode)->refn; |
| 363 | ORANGEFS_khandle_to(&refn.khandle, fh, 16); |
| 364 | fh[4] = refn.fs_id; |
| 365 | |
| 366 | gossip_debug(GOSSIP_SUPER_DEBUG, |
| 367 | "Encoding fh: handle %pU, fsid %u\n", |
| 368 | &refn.khandle, |
| 369 | refn.fs_id); |
| 370 | |
| 371 | |
| 372 | if (parent) { |
| 373 | refn = ORANGEFS_I(parent)->refn; |
| 374 | ORANGEFS_khandle_to(&refn.khandle, (char *) fh + 20, 16); |
| 375 | fh[9] = refn.fs_id; |
| 376 | |
| 377 | type = 2; |
| 378 | gossip_debug(GOSSIP_SUPER_DEBUG, |
| 379 | "Encoding parent: handle %pU, fsid %u\n", |
| 380 | &refn.khandle, |
| 381 | refn.fs_id); |
| 382 | } |
| 383 | *max_len = len; |
| 384 | |
| 385 | out: |
| 386 | return type; |
| 387 | } |
| 388 | |
| 389 | static const struct export_operations orangefs_export_ops = { |
| 390 | .encode_fh = orangefs_encode_fh, |
| 391 | .fh_to_dentry = orangefs_fh_to_dentry, |
| 392 | }; |
| 393 | |
| 394 | static int orangefs_unmount(int id, __s32 fs_id, const char *devname) |
| 395 | { |
| 396 | struct orangefs_kernel_op_s *op; |
| 397 | int r; |
| 398 | op = op_alloc(ORANGEFS_VFS_OP_FS_UMOUNT); |
| 399 | if (!op) |
| 400 | return -ENOMEM; |
| 401 | op->upcall.req.fs_umount.id = id; |
| 402 | op->upcall.req.fs_umount.fs_id = fs_id; |
| 403 | strncpy(op->upcall.req.fs_umount.orangefs_config_server, |
| 404 | devname, ORANGEFS_MAX_SERVER_ADDR_LEN - 1); |
| 405 | r = service_operation(op, "orangefs_fs_umount", 0); |
| 406 | /* Not much to do about an error here. */ |
| 407 | if (r) |
| 408 | gossip_err("orangefs_unmount: service_operation %d\n", r); |
| 409 | op_release(op); |
| 410 | return r; |
| 411 | } |
| 412 | |
| 413 | static int orangefs_fill_sb(struct super_block *sb, |
| 414 | struct orangefs_fs_mount_response *fs_mount, |
| 415 | void *data, int silent) |
| 416 | { |
| 417 | int ret; |
| 418 | struct inode *root; |
| 419 | struct dentry *root_dentry; |
| 420 | struct orangefs_object_kref root_object; |
| 421 | |
| 422 | ORANGEFS_SB(sb)->sb = sb; |
| 423 | |
| 424 | ORANGEFS_SB(sb)->root_khandle = fs_mount->root_khandle; |
| 425 | ORANGEFS_SB(sb)->fs_id = fs_mount->fs_id; |
| 426 | ORANGEFS_SB(sb)->id = fs_mount->id; |
| 427 | |
| 428 | if (data) { |
| 429 | ret = parse_mount_options(sb, data, silent); |
| 430 | if (ret) |
| 431 | return ret; |
| 432 | } |
| 433 | |
| 434 | /* Hang the xattr handlers off the superblock */ |
| 435 | sb->s_xattr = orangefs_xattr_handlers; |
| 436 | sb->s_magic = ORANGEFS_SUPER_MAGIC; |
| 437 | sb->s_op = &orangefs_s_ops; |
| 438 | sb->s_d_op = &orangefs_dentry_operations; |
| 439 | |
| 440 | sb->s_blocksize = PAGE_SIZE; |
| 441 | sb->s_blocksize_bits = PAGE_SHIFT; |
| 442 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
| 443 | |
| 444 | ret = super_setup_bdi(sb); |
| 445 | if (ret) |
| 446 | return ret; |
| 447 | |
| 448 | root_object.khandle = ORANGEFS_SB(sb)->root_khandle; |
| 449 | root_object.fs_id = ORANGEFS_SB(sb)->fs_id; |
| 450 | gossip_debug(GOSSIP_SUPER_DEBUG, |
| 451 | "get inode %pU, fsid %d\n", |
| 452 | &root_object.khandle, |
| 453 | root_object.fs_id); |
| 454 | |
| 455 | root = orangefs_iget(sb, &root_object); |
| 456 | if (IS_ERR(root)) |
| 457 | return PTR_ERR(root); |
| 458 | |
| 459 | gossip_debug(GOSSIP_SUPER_DEBUG, |
| 460 | "Allocated root inode [%p] with mode %x\n", |
| 461 | root, |
| 462 | root->i_mode); |
| 463 | |
| 464 | /* allocates and places root dentry in dcache */ |
| 465 | root_dentry = d_make_root(root); |
| 466 | if (!root_dentry) |
| 467 | return -ENOMEM; |
| 468 | |
| 469 | sb->s_export_op = &orangefs_export_ops; |
| 470 | sb->s_root = root_dentry; |
| 471 | return 0; |
| 472 | } |
| 473 | |
| 474 | struct dentry *orangefs_mount(struct file_system_type *fst, |
| 475 | int flags, |
| 476 | const char *devname, |
| 477 | void *data) |
| 478 | { |
| 479 | int ret; |
| 480 | struct super_block *sb = ERR_PTR(-EINVAL); |
| 481 | struct orangefs_kernel_op_s *new_op; |
| 482 | struct dentry *d = ERR_PTR(-EINVAL); |
| 483 | |
| 484 | gossip_debug(GOSSIP_SUPER_DEBUG, |
| 485 | "orangefs_mount: called with devname %s\n", |
| 486 | devname); |
| 487 | |
| 488 | if (!devname) { |
| 489 | gossip_err("ERROR: device name not specified.\n"); |
| 490 | return ERR_PTR(-EINVAL); |
| 491 | } |
| 492 | |
| 493 | new_op = op_alloc(ORANGEFS_VFS_OP_FS_MOUNT); |
| 494 | if (!new_op) |
| 495 | return ERR_PTR(-ENOMEM); |
| 496 | |
| 497 | strncpy(new_op->upcall.req.fs_mount.orangefs_config_server, |
| 498 | devname, |
| 499 | ORANGEFS_MAX_SERVER_ADDR_LEN - 1); |
| 500 | |
| 501 | gossip_debug(GOSSIP_SUPER_DEBUG, |
| 502 | "Attempting ORANGEFS Mount via host %s\n", |
| 503 | new_op->upcall.req.fs_mount.orangefs_config_server); |
| 504 | |
| 505 | ret = service_operation(new_op, "orangefs_mount", 0); |
| 506 | gossip_debug(GOSSIP_SUPER_DEBUG, |
| 507 | "orangefs_mount: mount got return value of %d\n", ret); |
| 508 | if (ret) |
| 509 | goto free_op; |
| 510 | |
| 511 | if (new_op->downcall.resp.fs_mount.fs_id == ORANGEFS_FS_ID_NULL) { |
| 512 | gossip_err("ERROR: Retrieved null fs_id\n"); |
| 513 | ret = -EINVAL; |
| 514 | goto free_op; |
| 515 | } |
| 516 | |
| 517 | sb = sget(fst, NULL, set_anon_super, flags, NULL); |
| 518 | |
| 519 | if (IS_ERR(sb)) { |
| 520 | d = ERR_CAST(sb); |
| 521 | orangefs_unmount(new_op->downcall.resp.fs_mount.id, |
| 522 | new_op->downcall.resp.fs_mount.fs_id, devname); |
| 523 | goto free_op; |
| 524 | } |
| 525 | |
| 526 | /* alloc and init our private orangefs sb info */ |
| 527 | sb->s_fs_info = kzalloc(sizeof(struct orangefs_sb_info_s), GFP_KERNEL); |
| 528 | if (!ORANGEFS_SB(sb)) { |
| 529 | d = ERR_PTR(-ENOMEM); |
| 530 | goto free_sb_and_op; |
| 531 | } |
| 532 | |
| 533 | ret = orangefs_fill_sb(sb, |
| 534 | &new_op->downcall.resp.fs_mount, data, |
| 535 | flags & SB_SILENT ? 1 : 0); |
| 536 | |
| 537 | if (ret) { |
| 538 | d = ERR_PTR(ret); |
| 539 | goto free_sb_and_op; |
| 540 | } |
| 541 | |
| 542 | /* |
| 543 | * on successful mount, store the devname and data |
| 544 | * used |
| 545 | */ |
| 546 | strncpy(ORANGEFS_SB(sb)->devname, |
| 547 | devname, |
| 548 | ORANGEFS_MAX_SERVER_ADDR_LEN - 1); |
| 549 | |
| 550 | /* mount_pending must be cleared */ |
| 551 | ORANGEFS_SB(sb)->mount_pending = 0; |
| 552 | |
| 553 | /* |
| 554 | * finally, add this sb to our list of known orangefs |
| 555 | * sb's |
| 556 | */ |
| 557 | gossip_debug(GOSSIP_SUPER_DEBUG, |
| 558 | "Adding SB %p to orangefs superblocks\n", |
| 559 | ORANGEFS_SB(sb)); |
| 560 | spin_lock(&orangefs_superblocks_lock); |
| 561 | list_add_tail(&ORANGEFS_SB(sb)->list, &orangefs_superblocks); |
| 562 | spin_unlock(&orangefs_superblocks_lock); |
| 563 | op_release(new_op); |
| 564 | |
| 565 | /* Must be removed from the list now. */ |
| 566 | ORANGEFS_SB(sb)->no_list = 0; |
| 567 | |
| 568 | if (orangefs_userspace_version >= 20906) { |
| 569 | new_op = op_alloc(ORANGEFS_VFS_OP_FEATURES); |
| 570 | if (!new_op) |
| 571 | return ERR_PTR(-ENOMEM); |
| 572 | new_op->upcall.req.features.features = 0; |
| 573 | ret = service_operation(new_op, "orangefs_features", 0); |
| 574 | orangefs_features = new_op->downcall.resp.features.features; |
| 575 | op_release(new_op); |
| 576 | } else { |
| 577 | orangefs_features = 0; |
| 578 | } |
| 579 | |
| 580 | return dget(sb->s_root); |
| 581 | |
| 582 | free_sb_and_op: |
| 583 | /* Will call orangefs_kill_sb with sb not in list. */ |
| 584 | ORANGEFS_SB(sb)->no_list = 1; |
| 585 | /* ORANGEFS_VFS_OP_FS_UMOUNT is done by orangefs_kill_sb. */ |
| 586 | deactivate_locked_super(sb); |
| 587 | free_op: |
| 588 | gossip_err("orangefs_mount: mount request failed with %d\n", ret); |
| 589 | if (ret == -EINVAL) { |
| 590 | gossip_err("Ensure that all orangefs-servers have the same FS configuration files\n"); |
| 591 | gossip_err("Look at pvfs2-client-core log file (typically /tmp/pvfs2-client.log) for more details\n"); |
| 592 | } |
| 593 | |
| 594 | op_release(new_op); |
| 595 | |
| 596 | return d; |
| 597 | } |
| 598 | |
| 599 | void orangefs_kill_sb(struct super_block *sb) |
| 600 | { |
| 601 | int r; |
| 602 | gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_kill_sb: called\n"); |
| 603 | |
| 604 | /* provided sb cleanup */ |
| 605 | kill_anon_super(sb); |
| 606 | |
| 607 | if (!ORANGEFS_SB(sb)) { |
| 608 | mutex_lock(&orangefs_request_mutex); |
| 609 | mutex_unlock(&orangefs_request_mutex); |
| 610 | return; |
| 611 | } |
| 612 | /* |
| 613 | * issue the unmount to userspace to tell it to remove the |
| 614 | * dynamic mount info it has for this superblock |
| 615 | */ |
| 616 | r = orangefs_unmount(ORANGEFS_SB(sb)->id, ORANGEFS_SB(sb)->fs_id, |
| 617 | ORANGEFS_SB(sb)->devname); |
| 618 | if (!r) |
| 619 | ORANGEFS_SB(sb)->mount_pending = 1; |
| 620 | |
| 621 | if (!ORANGEFS_SB(sb)->no_list) { |
| 622 | /* remove the sb from our list of orangefs specific sb's */ |
| 623 | spin_lock(&orangefs_superblocks_lock); |
| 624 | /* not list_del_init */ |
| 625 | __list_del_entry(&ORANGEFS_SB(sb)->list); |
| 626 | ORANGEFS_SB(sb)->list.prev = NULL; |
| 627 | spin_unlock(&orangefs_superblocks_lock); |
| 628 | } |
| 629 | |
| 630 | /* |
| 631 | * make sure that ORANGEFS_DEV_REMOUNT_ALL loop that might've seen us |
| 632 | * gets completed before we free the dang thing. |
| 633 | */ |
| 634 | mutex_lock(&orangefs_request_mutex); |
| 635 | mutex_unlock(&orangefs_request_mutex); |
| 636 | |
| 637 | /* free the orangefs superblock private data */ |
| 638 | kfree(ORANGEFS_SB(sb)); |
| 639 | } |
| 640 | |
| 641 | int orangefs_inode_cache_initialize(void) |
| 642 | { |
| 643 | orangefs_inode_cache = kmem_cache_create_usercopy( |
| 644 | "orangefs_inode_cache", |
| 645 | sizeof(struct orangefs_inode_s), |
| 646 | 0, |
| 647 | ORANGEFS_CACHE_CREATE_FLAGS, |
| 648 | offsetof(struct orangefs_inode_s, |
| 649 | link_target), |
| 650 | sizeof_field(struct orangefs_inode_s, |
| 651 | link_target), |
| 652 | orangefs_inode_cache_ctor); |
| 653 | |
| 654 | if (!orangefs_inode_cache) { |
| 655 | gossip_err("Cannot create orangefs_inode_cache\n"); |
| 656 | return -ENOMEM; |
| 657 | } |
| 658 | return 0; |
| 659 | } |
| 660 | |
| 661 | int orangefs_inode_cache_finalize(void) |
| 662 | { |
| 663 | kmem_cache_destroy(orangefs_inode_cache); |
| 664 | return 0; |
| 665 | } |