Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1 | #include "ceph_debug.h" |
| 2 | |
| 3 | #include <linux/module.h> |
| 4 | #include <linux/fs.h> |
| 5 | #include <linux/smp_lock.h> |
| 6 | #include <linux/slab.h> |
| 7 | #include <linux/string.h> |
| 8 | #include <linux/uaccess.h> |
| 9 | #include <linux/kernel.h> |
| 10 | #include <linux/namei.h> |
| 11 | #include <linux/writeback.h> |
| 12 | #include <linux/vmalloc.h> |
Yehuda Sadeh | c9af9fb | 2010-02-19 00:10:11 +0000 | [diff] [blame] | 13 | #include <linux/pagevec.h> |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 14 | |
| 15 | #include "super.h" |
| 16 | #include "decode.h" |
| 17 | |
| 18 | /* |
| 19 | * Ceph inode operations |
| 20 | * |
| 21 | * Implement basic inode helpers (get, alloc) and inode ops (getattr, |
| 22 | * setattr, etc.), xattr helpers, and helpers for assimilating |
| 23 | * metadata returned by the MDS into our cache. |
| 24 | * |
| 25 | * Also define helpers for doing asynchronous writeback, invalidation, |
| 26 | * and truncation for the benefit of those who can't afford to block |
| 27 | * (typically because they are in the message handler path). |
| 28 | */ |
| 29 | |
| 30 | static const struct inode_operations ceph_symlink_iops; |
| 31 | |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 32 | static void ceph_invalidate_work(struct work_struct *work); |
| 33 | static void ceph_writeback_work(struct work_struct *work); |
| 34 | static void ceph_vmtruncate_work(struct work_struct *work); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 35 | |
| 36 | /* |
| 37 | * find or create an inode, given the ceph ino number |
| 38 | */ |
| 39 | struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino) |
| 40 | { |
| 41 | struct inode *inode; |
| 42 | ino_t t = ceph_vino_to_ino(vino); |
| 43 | |
| 44 | inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino); |
| 45 | if (inode == NULL) |
| 46 | return ERR_PTR(-ENOMEM); |
| 47 | if (inode->i_state & I_NEW) { |
| 48 | dout("get_inode created new inode %p %llx.%llx ino %llx\n", |
| 49 | inode, ceph_vinop(inode), (u64)inode->i_ino); |
| 50 | unlock_new_inode(inode); |
| 51 | } |
| 52 | |
| 53 | dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino, |
| 54 | vino.snap, inode); |
| 55 | return inode; |
| 56 | } |
| 57 | |
| 58 | /* |
| 59 | * get/constuct snapdir inode for a given directory |
| 60 | */ |
| 61 | struct inode *ceph_get_snapdir(struct inode *parent) |
| 62 | { |
| 63 | struct ceph_vino vino = { |
| 64 | .ino = ceph_ino(parent), |
| 65 | .snap = CEPH_SNAPDIR, |
| 66 | }; |
| 67 | struct inode *inode = ceph_get_inode(parent->i_sb, vino); |
Sage Weil | b377ff1 | 2009-11-11 15:22:37 -0800 | [diff] [blame] | 68 | struct ceph_inode_info *ci = ceph_inode(inode); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 69 | |
| 70 | BUG_ON(!S_ISDIR(parent->i_mode)); |
| 71 | if (IS_ERR(inode)) |
| 72 | return ERR_PTR(PTR_ERR(inode)); |
| 73 | inode->i_mode = parent->i_mode; |
| 74 | inode->i_uid = parent->i_uid; |
| 75 | inode->i_gid = parent->i_gid; |
| 76 | inode->i_op = &ceph_dir_iops; |
| 77 | inode->i_fop = &ceph_dir_fops; |
Sage Weil | b377ff1 | 2009-11-11 15:22:37 -0800 | [diff] [blame] | 78 | ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */ |
| 79 | ci->i_rbytes = 0; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 80 | return inode; |
| 81 | } |
| 82 | |
| 83 | const struct inode_operations ceph_file_iops = { |
| 84 | .permission = ceph_permission, |
| 85 | .setattr = ceph_setattr, |
| 86 | .getattr = ceph_getattr, |
| 87 | .setxattr = ceph_setxattr, |
| 88 | .getxattr = ceph_getxattr, |
| 89 | .listxattr = ceph_listxattr, |
| 90 | .removexattr = ceph_removexattr, |
| 91 | }; |
| 92 | |
| 93 | |
| 94 | /* |
| 95 | * We use a 'frag tree' to keep track of the MDS's directory fragments |
| 96 | * for a given inode (usually there is just a single fragment). We |
| 97 | * need to know when a child frag is delegated to a new MDS, or when |
| 98 | * it is flagged as replicated, so we can direct our requests |
| 99 | * accordingly. |
| 100 | */ |
| 101 | |
| 102 | /* |
| 103 | * find/create a frag in the tree |
| 104 | */ |
| 105 | static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci, |
| 106 | u32 f) |
| 107 | { |
| 108 | struct rb_node **p; |
| 109 | struct rb_node *parent = NULL; |
| 110 | struct ceph_inode_frag *frag; |
| 111 | int c; |
| 112 | |
| 113 | p = &ci->i_fragtree.rb_node; |
| 114 | while (*p) { |
| 115 | parent = *p; |
| 116 | frag = rb_entry(parent, struct ceph_inode_frag, node); |
| 117 | c = ceph_frag_compare(f, frag->frag); |
| 118 | if (c < 0) |
| 119 | p = &(*p)->rb_left; |
| 120 | else if (c > 0) |
| 121 | p = &(*p)->rb_right; |
| 122 | else |
| 123 | return frag; |
| 124 | } |
| 125 | |
| 126 | frag = kmalloc(sizeof(*frag), GFP_NOFS); |
| 127 | if (!frag) { |
| 128 | pr_err("__get_or_create_frag ENOMEM on %p %llx.%llx " |
| 129 | "frag %x\n", &ci->vfs_inode, |
| 130 | ceph_vinop(&ci->vfs_inode), f); |
| 131 | return ERR_PTR(-ENOMEM); |
| 132 | } |
| 133 | frag->frag = f; |
| 134 | frag->split_by = 0; |
| 135 | frag->mds = -1; |
| 136 | frag->ndist = 0; |
| 137 | |
| 138 | rb_link_node(&frag->node, parent, p); |
| 139 | rb_insert_color(&frag->node, &ci->i_fragtree); |
| 140 | |
| 141 | dout("get_or_create_frag added %llx.%llx frag %x\n", |
| 142 | ceph_vinop(&ci->vfs_inode), f); |
| 143 | return frag; |
| 144 | } |
| 145 | |
| 146 | /* |
| 147 | * find a specific frag @f |
| 148 | */ |
| 149 | struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f) |
| 150 | { |
| 151 | struct rb_node *n = ci->i_fragtree.rb_node; |
| 152 | |
| 153 | while (n) { |
| 154 | struct ceph_inode_frag *frag = |
| 155 | rb_entry(n, struct ceph_inode_frag, node); |
| 156 | int c = ceph_frag_compare(f, frag->frag); |
| 157 | if (c < 0) |
| 158 | n = n->rb_left; |
| 159 | else if (c > 0) |
| 160 | n = n->rb_right; |
| 161 | else |
| 162 | return frag; |
| 163 | } |
| 164 | return NULL; |
| 165 | } |
| 166 | |
| 167 | /* |
| 168 | * Choose frag containing the given value @v. If @pfrag is |
| 169 | * specified, copy the frag delegation info to the caller if |
| 170 | * it is present. |
| 171 | */ |
| 172 | u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, |
| 173 | struct ceph_inode_frag *pfrag, |
| 174 | int *found) |
| 175 | { |
| 176 | u32 t = ceph_frag_make(0, 0); |
| 177 | struct ceph_inode_frag *frag; |
| 178 | unsigned nway, i; |
| 179 | u32 n; |
| 180 | |
| 181 | if (found) |
| 182 | *found = 0; |
| 183 | |
| 184 | mutex_lock(&ci->i_fragtree_mutex); |
| 185 | while (1) { |
| 186 | WARN_ON(!ceph_frag_contains_value(t, v)); |
| 187 | frag = __ceph_find_frag(ci, t); |
| 188 | if (!frag) |
| 189 | break; /* t is a leaf */ |
| 190 | if (frag->split_by == 0) { |
| 191 | if (pfrag) |
| 192 | memcpy(pfrag, frag, sizeof(*pfrag)); |
| 193 | if (found) |
| 194 | *found = 1; |
| 195 | break; |
| 196 | } |
| 197 | |
| 198 | /* choose child */ |
| 199 | nway = 1 << frag->split_by; |
| 200 | dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t, |
| 201 | frag->split_by, nway); |
| 202 | for (i = 0; i < nway; i++) { |
| 203 | n = ceph_frag_make_child(t, frag->split_by, i); |
| 204 | if (ceph_frag_contains_value(n, v)) { |
| 205 | t = n; |
| 206 | break; |
| 207 | } |
| 208 | } |
| 209 | BUG_ON(i == nway); |
| 210 | } |
| 211 | dout("choose_frag(%x) = %x\n", v, t); |
| 212 | |
| 213 | mutex_unlock(&ci->i_fragtree_mutex); |
| 214 | return t; |
| 215 | } |
| 216 | |
| 217 | /* |
| 218 | * Process dirfrag (delegation) info from the mds. Include leaf |
| 219 | * fragment in tree ONLY if ndist > 0. Otherwise, only |
| 220 | * branches/splits are included in i_fragtree) |
| 221 | */ |
| 222 | static int ceph_fill_dirfrag(struct inode *inode, |
| 223 | struct ceph_mds_reply_dirfrag *dirinfo) |
| 224 | { |
| 225 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 226 | struct ceph_inode_frag *frag; |
| 227 | u32 id = le32_to_cpu(dirinfo->frag); |
| 228 | int mds = le32_to_cpu(dirinfo->auth); |
| 229 | int ndist = le32_to_cpu(dirinfo->ndist); |
| 230 | int i; |
| 231 | int err = 0; |
| 232 | |
| 233 | mutex_lock(&ci->i_fragtree_mutex); |
| 234 | if (ndist == 0) { |
| 235 | /* no delegation info needed. */ |
| 236 | frag = __ceph_find_frag(ci, id); |
| 237 | if (!frag) |
| 238 | goto out; |
| 239 | if (frag->split_by == 0) { |
| 240 | /* tree leaf, remove */ |
| 241 | dout("fill_dirfrag removed %llx.%llx frag %x" |
| 242 | " (no ref)\n", ceph_vinop(inode), id); |
| 243 | rb_erase(&frag->node, &ci->i_fragtree); |
| 244 | kfree(frag); |
| 245 | } else { |
| 246 | /* tree branch, keep and clear */ |
| 247 | dout("fill_dirfrag cleared %llx.%llx frag %x" |
| 248 | " referral\n", ceph_vinop(inode), id); |
| 249 | frag->mds = -1; |
| 250 | frag->ndist = 0; |
| 251 | } |
| 252 | goto out; |
| 253 | } |
| 254 | |
| 255 | |
| 256 | /* find/add this frag to store mds delegation info */ |
| 257 | frag = __get_or_create_frag(ci, id); |
| 258 | if (IS_ERR(frag)) { |
| 259 | /* this is not the end of the world; we can continue |
| 260 | with bad/inaccurate delegation info */ |
| 261 | pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n", |
| 262 | ceph_vinop(inode), le32_to_cpu(dirinfo->frag)); |
| 263 | err = -ENOMEM; |
| 264 | goto out; |
| 265 | } |
| 266 | |
| 267 | frag->mds = mds; |
| 268 | frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP); |
| 269 | for (i = 0; i < frag->ndist; i++) |
| 270 | frag->dist[i] = le32_to_cpu(dirinfo->dist[i]); |
| 271 | dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n", |
| 272 | ceph_vinop(inode), frag->frag, frag->ndist); |
| 273 | |
| 274 | out: |
| 275 | mutex_unlock(&ci->i_fragtree_mutex); |
| 276 | return err; |
| 277 | } |
| 278 | |
| 279 | |
| 280 | /* |
| 281 | * initialize a newly allocated inode. |
| 282 | */ |
| 283 | struct inode *ceph_alloc_inode(struct super_block *sb) |
| 284 | { |
| 285 | struct ceph_inode_info *ci; |
| 286 | int i; |
| 287 | |
| 288 | ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS); |
| 289 | if (!ci) |
| 290 | return NULL; |
| 291 | |
| 292 | dout("alloc_inode %p\n", &ci->vfs_inode); |
| 293 | |
| 294 | ci->i_version = 0; |
| 295 | ci->i_time_warp_seq = 0; |
| 296 | ci->i_ceph_flags = 0; |
| 297 | ci->i_release_count = 0; |
| 298 | ci->i_symlink = NULL; |
| 299 | |
| 300 | ci->i_fragtree = RB_ROOT; |
| 301 | mutex_init(&ci->i_fragtree_mutex); |
| 302 | |
| 303 | ci->i_xattrs.blob = NULL; |
| 304 | ci->i_xattrs.prealloc_blob = NULL; |
| 305 | ci->i_xattrs.dirty = false; |
| 306 | ci->i_xattrs.index = RB_ROOT; |
| 307 | ci->i_xattrs.count = 0; |
| 308 | ci->i_xattrs.names_size = 0; |
| 309 | ci->i_xattrs.vals_size = 0; |
| 310 | ci->i_xattrs.version = 0; |
| 311 | ci->i_xattrs.index_version = 0; |
| 312 | |
| 313 | ci->i_caps = RB_ROOT; |
| 314 | ci->i_auth_cap = NULL; |
| 315 | ci->i_dirty_caps = 0; |
| 316 | ci->i_flushing_caps = 0; |
| 317 | INIT_LIST_HEAD(&ci->i_dirty_item); |
| 318 | INIT_LIST_HEAD(&ci->i_flushing_item); |
| 319 | ci->i_cap_flush_seq = 0; |
| 320 | ci->i_cap_flush_last_tid = 0; |
| 321 | memset(&ci->i_cap_flush_tid, 0, sizeof(ci->i_cap_flush_tid)); |
| 322 | init_waitqueue_head(&ci->i_cap_wq); |
| 323 | ci->i_hold_caps_min = 0; |
| 324 | ci->i_hold_caps_max = 0; |
| 325 | INIT_LIST_HEAD(&ci->i_cap_delay_list); |
| 326 | ci->i_cap_exporting_mds = 0; |
| 327 | ci->i_cap_exporting_mseq = 0; |
| 328 | ci->i_cap_exporting_issued = 0; |
| 329 | INIT_LIST_HEAD(&ci->i_cap_snaps); |
| 330 | ci->i_head_snapc = NULL; |
| 331 | ci->i_snap_caps = 0; |
| 332 | |
| 333 | for (i = 0; i < CEPH_FILE_MODE_NUM; i++) |
| 334 | ci->i_nr_by_mode[i] = 0; |
| 335 | |
| 336 | ci->i_truncate_seq = 0; |
| 337 | ci->i_truncate_size = 0; |
| 338 | ci->i_truncate_pending = 0; |
| 339 | |
| 340 | ci->i_max_size = 0; |
| 341 | ci->i_reported_size = 0; |
| 342 | ci->i_wanted_max_size = 0; |
| 343 | ci->i_requested_max_size = 0; |
| 344 | |
| 345 | ci->i_pin_ref = 0; |
| 346 | ci->i_rd_ref = 0; |
| 347 | ci->i_rdcache_ref = 0; |
| 348 | ci->i_wr_ref = 0; |
| 349 | ci->i_wrbuffer_ref = 0; |
| 350 | ci->i_wrbuffer_ref_head = 0; |
| 351 | ci->i_shared_gen = 0; |
| 352 | ci->i_rdcache_gen = 0; |
| 353 | ci->i_rdcache_revoking = 0; |
| 354 | |
| 355 | INIT_LIST_HEAD(&ci->i_unsafe_writes); |
| 356 | INIT_LIST_HEAD(&ci->i_unsafe_dirops); |
| 357 | spin_lock_init(&ci->i_unsafe_lock); |
| 358 | |
| 359 | ci->i_snap_realm = NULL; |
| 360 | INIT_LIST_HEAD(&ci->i_snap_realm_item); |
| 361 | INIT_LIST_HEAD(&ci->i_snap_flush_item); |
| 362 | |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 363 | INIT_WORK(&ci->i_wb_work, ceph_writeback_work); |
| 364 | INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 365 | |
| 366 | INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work); |
| 367 | |
| 368 | return &ci->vfs_inode; |
| 369 | } |
| 370 | |
| 371 | void ceph_destroy_inode(struct inode *inode) |
| 372 | { |
| 373 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 374 | struct ceph_inode_frag *frag; |
| 375 | struct rb_node *n; |
| 376 | |
| 377 | dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode)); |
| 378 | |
| 379 | ceph_queue_caps_release(inode); |
| 380 | |
Sage Weil | 8b218b8 | 2010-03-09 12:59:08 -0800 | [diff] [blame] | 381 | /* |
| 382 | * we may still have a snap_realm reference if there are stray |
| 383 | * caps in i_cap_exporting_issued or i_snap_caps. |
| 384 | */ |
| 385 | if (ci->i_snap_realm) { |
| 386 | struct ceph_mds_client *mdsc = |
| 387 | &ceph_client(ci->vfs_inode.i_sb)->mdsc; |
| 388 | struct ceph_snap_realm *realm = ci->i_snap_realm; |
| 389 | |
| 390 | dout(" dropping residual ref to snap realm %p\n", realm); |
| 391 | spin_lock(&realm->inodes_with_caps_lock); |
| 392 | list_del_init(&ci->i_snap_realm_item); |
| 393 | spin_unlock(&realm->inodes_with_caps_lock); |
| 394 | ceph_put_snap_realm(mdsc, realm); |
| 395 | } |
| 396 | |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 397 | kfree(ci->i_symlink); |
| 398 | while ((n = rb_first(&ci->i_fragtree)) != NULL) { |
| 399 | frag = rb_entry(n, struct ceph_inode_frag, node); |
| 400 | rb_erase(n, &ci->i_fragtree); |
| 401 | kfree(frag); |
| 402 | } |
| 403 | |
| 404 | __ceph_destroy_xattrs(ci); |
Sage Weil | b6c1d5b | 2009-12-07 12:17:17 -0800 | [diff] [blame] | 405 | if (ci->i_xattrs.blob) |
| 406 | ceph_buffer_put(ci->i_xattrs.blob); |
| 407 | if (ci->i_xattrs.prealloc_blob) |
| 408 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 409 | |
| 410 | kmem_cache_free(ceph_inode_cachep, ci); |
| 411 | } |
| 412 | |
| 413 | |
| 414 | /* |
| 415 | * Helpers to fill in size, ctime, mtime, and atime. We have to be |
| 416 | * careful because either the client or MDS may have more up to date |
| 417 | * info, depending on which capabilities are held, and whether |
| 418 | * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime |
| 419 | * and size are monotonically increasing, except when utimes() or |
| 420 | * truncate() increments the corresponding _seq values.) |
| 421 | */ |
| 422 | int ceph_fill_file_size(struct inode *inode, int issued, |
| 423 | u32 truncate_seq, u64 truncate_size, u64 size) |
| 424 | { |
| 425 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 426 | int queue_trunc = 0; |
| 427 | |
| 428 | if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 || |
| 429 | (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) { |
| 430 | dout("size %lld -> %llu\n", inode->i_size, size); |
| 431 | inode->i_size = size; |
| 432 | inode->i_blocks = (size + (1<<9) - 1) >> 9; |
| 433 | ci->i_reported_size = size; |
| 434 | if (truncate_seq != ci->i_truncate_seq) { |
| 435 | dout("truncate_seq %u -> %u\n", |
| 436 | ci->i_truncate_seq, truncate_seq); |
| 437 | ci->i_truncate_seq = truncate_seq; |
Yehuda Sadeh | 3d497d8 | 2010-02-09 11:08:40 -0800 | [diff] [blame] | 438 | /* |
| 439 | * If we hold relevant caps, or in the case where we're |
| 440 | * not the only client referencing this file and we |
| 441 | * don't hold those caps, then we need to check whether |
| 442 | * the file is either opened or mmaped |
| 443 | */ |
| 444 | if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_RD| |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 445 | CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER| |
Yehuda Sadeh | 3d497d8 | 2010-02-09 11:08:40 -0800 | [diff] [blame] | 446 | CEPH_CAP_FILE_EXCL)) || |
| 447 | mapping_mapped(inode->i_mapping) || |
| 448 | __ceph_caps_file_wanted(ci)) { |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 449 | ci->i_truncate_pending++; |
| 450 | queue_trunc = 1; |
| 451 | } |
| 452 | } |
| 453 | } |
| 454 | if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 && |
| 455 | ci->i_truncate_size != truncate_size) { |
| 456 | dout("truncate_size %lld -> %llu\n", ci->i_truncate_size, |
| 457 | truncate_size); |
| 458 | ci->i_truncate_size = truncate_size; |
| 459 | } |
| 460 | return queue_trunc; |
| 461 | } |
| 462 | |
| 463 | void ceph_fill_file_time(struct inode *inode, int issued, |
| 464 | u64 time_warp_seq, struct timespec *ctime, |
| 465 | struct timespec *mtime, struct timespec *atime) |
| 466 | { |
| 467 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 468 | int warn = 0; |
| 469 | |
| 470 | if (issued & (CEPH_CAP_FILE_EXCL| |
| 471 | CEPH_CAP_FILE_WR| |
| 472 | CEPH_CAP_FILE_BUFFER)) { |
| 473 | if (timespec_compare(ctime, &inode->i_ctime) > 0) { |
| 474 | dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n", |
| 475 | inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, |
| 476 | ctime->tv_sec, ctime->tv_nsec); |
| 477 | inode->i_ctime = *ctime; |
| 478 | } |
| 479 | if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) { |
| 480 | /* the MDS did a utimes() */ |
| 481 | dout("mtime %ld.%09ld -> %ld.%09ld " |
| 482 | "tw %d -> %d\n", |
| 483 | inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, |
| 484 | mtime->tv_sec, mtime->tv_nsec, |
| 485 | ci->i_time_warp_seq, (int)time_warp_seq); |
| 486 | |
| 487 | inode->i_mtime = *mtime; |
| 488 | inode->i_atime = *atime; |
| 489 | ci->i_time_warp_seq = time_warp_seq; |
| 490 | } else if (time_warp_seq == ci->i_time_warp_seq) { |
| 491 | /* nobody did utimes(); take the max */ |
| 492 | if (timespec_compare(mtime, &inode->i_mtime) > 0) { |
| 493 | dout("mtime %ld.%09ld -> %ld.%09ld inc\n", |
| 494 | inode->i_mtime.tv_sec, |
| 495 | inode->i_mtime.tv_nsec, |
| 496 | mtime->tv_sec, mtime->tv_nsec); |
| 497 | inode->i_mtime = *mtime; |
| 498 | } |
| 499 | if (timespec_compare(atime, &inode->i_atime) > 0) { |
| 500 | dout("atime %ld.%09ld -> %ld.%09ld inc\n", |
| 501 | inode->i_atime.tv_sec, |
| 502 | inode->i_atime.tv_nsec, |
| 503 | atime->tv_sec, atime->tv_nsec); |
| 504 | inode->i_atime = *atime; |
| 505 | } |
| 506 | } else if (issued & CEPH_CAP_FILE_EXCL) { |
| 507 | /* we did a utimes(); ignore mds values */ |
| 508 | } else { |
| 509 | warn = 1; |
| 510 | } |
| 511 | } else { |
| 512 | /* we have no write caps; whatever the MDS says is true */ |
| 513 | if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) { |
| 514 | inode->i_ctime = *ctime; |
| 515 | inode->i_mtime = *mtime; |
| 516 | inode->i_atime = *atime; |
| 517 | ci->i_time_warp_seq = time_warp_seq; |
| 518 | } else { |
| 519 | warn = 1; |
| 520 | } |
| 521 | } |
| 522 | if (warn) /* time_warp_seq shouldn't go backwards */ |
| 523 | dout("%p mds time_warp_seq %llu < %u\n", |
| 524 | inode, time_warp_seq, ci->i_time_warp_seq); |
| 525 | } |
| 526 | |
| 527 | /* |
| 528 | * Populate an inode based on info from mds. May be called on new or |
| 529 | * existing inodes. |
| 530 | */ |
| 531 | static int fill_inode(struct inode *inode, |
| 532 | struct ceph_mds_reply_info_in *iinfo, |
| 533 | struct ceph_mds_reply_dirfrag *dirinfo, |
| 534 | struct ceph_mds_session *session, |
| 535 | unsigned long ttl_from, int cap_fmode, |
| 536 | struct ceph_cap_reservation *caps_reservation) |
| 537 | { |
| 538 | struct ceph_mds_reply_inode *info = iinfo->in; |
| 539 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 540 | int i; |
| 541 | int issued, implemented; |
| 542 | struct timespec mtime, atime, ctime; |
| 543 | u32 nsplits; |
| 544 | struct ceph_buffer *xattr_blob = NULL; |
| 545 | int err = 0; |
| 546 | int queue_trunc = 0; |
| 547 | |
| 548 | dout("fill_inode %p ino %llx.%llx v %llu had %llu\n", |
| 549 | inode, ceph_vinop(inode), le64_to_cpu(info->version), |
| 550 | ci->i_version); |
| 551 | |
| 552 | /* |
| 553 | * prealloc xattr data, if it looks like we'll need it. only |
| 554 | * if len > 4 (meaning there are actually xattrs; the first 4 |
| 555 | * bytes are the xattr count). |
| 556 | */ |
| 557 | if (iinfo->xattr_len > 4) { |
Sage Weil | b6c1d5b | 2009-12-07 12:17:17 -0800 | [diff] [blame] | 558 | xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 559 | if (!xattr_blob) |
| 560 | pr_err("fill_inode ENOMEM xattr blob %d bytes\n", |
| 561 | iinfo->xattr_len); |
| 562 | } |
| 563 | |
| 564 | spin_lock(&inode->i_lock); |
| 565 | |
| 566 | /* |
| 567 | * provided version will be odd if inode value is projected, |
| 568 | * even if stable. skip the update if we have a newer info |
| 569 | * (e.g., due to inode info racing form multiple MDSs), or if |
| 570 | * we are getting projected (unstable) inode info. |
| 571 | */ |
| 572 | if (le64_to_cpu(info->version) > 0 && |
| 573 | (ci->i_version & ~1) > le64_to_cpu(info->version)) |
| 574 | goto no_change; |
| 575 | |
| 576 | issued = __ceph_caps_issued(ci, &implemented); |
| 577 | issued |= implemented | __ceph_caps_dirty(ci); |
| 578 | |
| 579 | /* update inode */ |
| 580 | ci->i_version = le64_to_cpu(info->version); |
| 581 | inode->i_version++; |
| 582 | inode->i_rdev = le32_to_cpu(info->rdev); |
| 583 | |
| 584 | if ((issued & CEPH_CAP_AUTH_EXCL) == 0) { |
| 585 | inode->i_mode = le32_to_cpu(info->mode); |
| 586 | inode->i_uid = le32_to_cpu(info->uid); |
| 587 | inode->i_gid = le32_to_cpu(info->gid); |
| 588 | dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode, |
| 589 | inode->i_uid, inode->i_gid); |
| 590 | } |
| 591 | |
| 592 | if ((issued & CEPH_CAP_LINK_EXCL) == 0) |
| 593 | inode->i_nlink = le32_to_cpu(info->nlink); |
| 594 | |
| 595 | /* be careful with mtime, atime, size */ |
| 596 | ceph_decode_timespec(&atime, &info->atime); |
| 597 | ceph_decode_timespec(&mtime, &info->mtime); |
| 598 | ceph_decode_timespec(&ctime, &info->ctime); |
| 599 | queue_trunc = ceph_fill_file_size(inode, issued, |
| 600 | le32_to_cpu(info->truncate_seq), |
| 601 | le64_to_cpu(info->truncate_size), |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 602 | le64_to_cpu(info->size)); |
| 603 | ceph_fill_file_time(inode, issued, |
| 604 | le32_to_cpu(info->time_warp_seq), |
| 605 | &ctime, &mtime, &atime); |
| 606 | |
| 607 | ci->i_max_size = le64_to_cpu(info->max_size); |
| 608 | ci->i_layout = info->layout; |
| 609 | inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; |
| 610 | |
| 611 | /* xattrs */ |
| 612 | /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */ |
| 613 | if ((issued & CEPH_CAP_XATTR_EXCL) == 0 && |
| 614 | le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) { |
| 615 | if (ci->i_xattrs.blob) |
| 616 | ceph_buffer_put(ci->i_xattrs.blob); |
| 617 | ci->i_xattrs.blob = xattr_blob; |
| 618 | if (xattr_blob) |
| 619 | memcpy(ci->i_xattrs.blob->vec.iov_base, |
| 620 | iinfo->xattr_data, iinfo->xattr_len); |
| 621 | ci->i_xattrs.version = le64_to_cpu(info->xattr_version); |
| 622 | } |
| 623 | |
| 624 | inode->i_mapping->a_ops = &ceph_aops; |
| 625 | inode->i_mapping->backing_dev_info = |
| 626 | &ceph_client(inode->i_sb)->backing_dev_info; |
| 627 | |
| 628 | switch (inode->i_mode & S_IFMT) { |
| 629 | case S_IFIFO: |
| 630 | case S_IFBLK: |
| 631 | case S_IFCHR: |
| 632 | case S_IFSOCK: |
| 633 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
| 634 | inode->i_op = &ceph_file_iops; |
| 635 | break; |
| 636 | case S_IFREG: |
| 637 | inode->i_op = &ceph_file_iops; |
| 638 | inode->i_fop = &ceph_file_fops; |
| 639 | break; |
| 640 | case S_IFLNK: |
| 641 | inode->i_op = &ceph_symlink_iops; |
| 642 | if (!ci->i_symlink) { |
| 643 | int symlen = iinfo->symlink_len; |
| 644 | char *sym; |
| 645 | |
| 646 | BUG_ON(symlen != inode->i_size); |
| 647 | spin_unlock(&inode->i_lock); |
| 648 | |
| 649 | err = -ENOMEM; |
| 650 | sym = kmalloc(symlen+1, GFP_NOFS); |
| 651 | if (!sym) |
| 652 | goto out; |
| 653 | memcpy(sym, iinfo->symlink, symlen); |
| 654 | sym[symlen] = 0; |
| 655 | |
| 656 | spin_lock(&inode->i_lock); |
| 657 | if (!ci->i_symlink) |
| 658 | ci->i_symlink = sym; |
| 659 | else |
| 660 | kfree(sym); /* lost a race */ |
| 661 | } |
| 662 | break; |
| 663 | case S_IFDIR: |
| 664 | inode->i_op = &ceph_dir_iops; |
| 665 | inode->i_fop = &ceph_dir_fops; |
| 666 | |
| 667 | ci->i_files = le64_to_cpu(info->files); |
| 668 | ci->i_subdirs = le64_to_cpu(info->subdirs); |
| 669 | ci->i_rbytes = le64_to_cpu(info->rbytes); |
| 670 | ci->i_rfiles = le64_to_cpu(info->rfiles); |
| 671 | ci->i_rsubdirs = le64_to_cpu(info->rsubdirs); |
| 672 | ceph_decode_timespec(&ci->i_rctime, &info->rctime); |
| 673 | |
| 674 | /* set dir completion flag? */ |
| 675 | if (ci->i_files == 0 && ci->i_subdirs == 0 && |
| 676 | ceph_snap(inode) == CEPH_NOSNAP && |
| 677 | (le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED)) { |
| 678 | dout(" marking %p complete (empty)\n", inode); |
| 679 | ci->i_ceph_flags |= CEPH_I_COMPLETE; |
| 680 | ci->i_max_offset = 2; |
| 681 | } |
| 682 | |
| 683 | /* it may be better to set st_size in getattr instead? */ |
| 684 | if (ceph_test_opt(ceph_client(inode->i_sb), RBYTES)) |
| 685 | inode->i_size = ci->i_rbytes; |
| 686 | break; |
| 687 | default: |
| 688 | pr_err("fill_inode %llx.%llx BAD mode 0%o\n", |
| 689 | ceph_vinop(inode), inode->i_mode); |
| 690 | } |
| 691 | |
| 692 | no_change: |
| 693 | spin_unlock(&inode->i_lock); |
| 694 | |
| 695 | /* queue truncate if we saw i_size decrease */ |
| 696 | if (queue_trunc) |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 697 | ceph_queue_vmtruncate(inode); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 698 | |
| 699 | /* populate frag tree */ |
| 700 | /* FIXME: move me up, if/when version reflects fragtree changes */ |
| 701 | nsplits = le32_to_cpu(info->fragtree.nsplits); |
| 702 | mutex_lock(&ci->i_fragtree_mutex); |
| 703 | for (i = 0; i < nsplits; i++) { |
| 704 | u32 id = le32_to_cpu(info->fragtree.splits[i].frag); |
| 705 | struct ceph_inode_frag *frag = __get_or_create_frag(ci, id); |
| 706 | |
| 707 | if (IS_ERR(frag)) |
| 708 | continue; |
| 709 | frag->split_by = le32_to_cpu(info->fragtree.splits[i].by); |
| 710 | dout(" frag %x split by %d\n", frag->frag, frag->split_by); |
| 711 | } |
| 712 | mutex_unlock(&ci->i_fragtree_mutex); |
| 713 | |
| 714 | /* were we issued a capability? */ |
| 715 | if (info->cap.caps) { |
| 716 | if (ceph_snap(inode) == CEPH_NOSNAP) { |
| 717 | ceph_add_cap(inode, session, |
| 718 | le64_to_cpu(info->cap.cap_id), |
| 719 | cap_fmode, |
| 720 | le32_to_cpu(info->cap.caps), |
| 721 | le32_to_cpu(info->cap.wanted), |
| 722 | le32_to_cpu(info->cap.seq), |
| 723 | le32_to_cpu(info->cap.mseq), |
| 724 | le64_to_cpu(info->cap.realm), |
| 725 | info->cap.flags, |
| 726 | caps_reservation); |
| 727 | } else { |
| 728 | spin_lock(&inode->i_lock); |
| 729 | dout(" %p got snap_caps %s\n", inode, |
| 730 | ceph_cap_string(le32_to_cpu(info->cap.caps))); |
| 731 | ci->i_snap_caps |= le32_to_cpu(info->cap.caps); |
| 732 | if (cap_fmode >= 0) |
| 733 | __ceph_get_fmode(ci, cap_fmode); |
| 734 | spin_unlock(&inode->i_lock); |
| 735 | } |
| 736 | } |
| 737 | |
| 738 | /* update delegation info? */ |
| 739 | if (dirinfo) |
| 740 | ceph_fill_dirfrag(inode, dirinfo); |
| 741 | |
| 742 | err = 0; |
| 743 | |
| 744 | out: |
Sage Weil | b6c1d5b | 2009-12-07 12:17:17 -0800 | [diff] [blame] | 745 | if (xattr_blob) |
| 746 | ceph_buffer_put(xattr_blob); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 747 | return err; |
| 748 | } |
| 749 | |
| 750 | /* |
| 751 | * caller should hold session s_mutex. |
| 752 | */ |
| 753 | static void update_dentry_lease(struct dentry *dentry, |
| 754 | struct ceph_mds_reply_lease *lease, |
| 755 | struct ceph_mds_session *session, |
| 756 | unsigned long from_time) |
| 757 | { |
| 758 | struct ceph_dentry_info *di = ceph_dentry(dentry); |
| 759 | long unsigned duration = le32_to_cpu(lease->duration_ms); |
| 760 | long unsigned ttl = from_time + (duration * HZ) / 1000; |
| 761 | long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000; |
| 762 | struct inode *dir; |
| 763 | |
| 764 | /* only track leases on regular dentries */ |
| 765 | if (dentry->d_op != &ceph_dentry_ops) |
| 766 | return; |
| 767 | |
| 768 | spin_lock(&dentry->d_lock); |
| 769 | dout("update_dentry_lease %p mask %d duration %lu ms ttl %lu\n", |
| 770 | dentry, le16_to_cpu(lease->mask), duration, ttl); |
| 771 | |
| 772 | /* make lease_rdcache_gen match directory */ |
| 773 | dir = dentry->d_parent->d_inode; |
| 774 | di->lease_shared_gen = ceph_inode(dir)->i_shared_gen; |
| 775 | |
| 776 | if (lease->mask == 0) |
| 777 | goto out_unlock; |
| 778 | |
| 779 | if (di->lease_gen == session->s_cap_gen && |
| 780 | time_before(ttl, dentry->d_time)) |
| 781 | goto out_unlock; /* we already have a newer lease. */ |
| 782 | |
| 783 | if (di->lease_session && di->lease_session != session) |
| 784 | goto out_unlock; |
| 785 | |
| 786 | ceph_dentry_lru_touch(dentry); |
| 787 | |
| 788 | if (!di->lease_session) |
| 789 | di->lease_session = ceph_get_mds_session(session); |
| 790 | di->lease_gen = session->s_cap_gen; |
| 791 | di->lease_seq = le32_to_cpu(lease->seq); |
| 792 | di->lease_renew_after = half_ttl; |
| 793 | di->lease_renew_from = 0; |
| 794 | dentry->d_time = ttl; |
| 795 | out_unlock: |
| 796 | spin_unlock(&dentry->d_lock); |
| 797 | return; |
| 798 | } |
| 799 | |
| 800 | /* |
| 801 | * splice a dentry to an inode. |
| 802 | * caller must hold directory i_mutex for this to be safe. |
| 803 | * |
| 804 | * we will only rehash the resulting dentry if @prehash is |
| 805 | * true; @prehash will be set to false (for the benefit of |
| 806 | * the caller) if we fail. |
| 807 | */ |
| 808 | static struct dentry *splice_dentry(struct dentry *dn, struct inode *in, |
| 809 | bool *prehash) |
| 810 | { |
| 811 | struct dentry *realdn; |
| 812 | |
| 813 | /* dn must be unhashed */ |
| 814 | if (!d_unhashed(dn)) |
| 815 | d_drop(dn); |
| 816 | realdn = d_materialise_unique(dn, in); |
| 817 | if (IS_ERR(realdn)) { |
| 818 | pr_err("splice_dentry error %p inode %p ino %llx.%llx\n", |
| 819 | dn, in, ceph_vinop(in)); |
| 820 | if (prehash) |
| 821 | *prehash = false; /* don't rehash on error */ |
| 822 | dn = realdn; /* note realdn contains the error */ |
| 823 | goto out; |
| 824 | } else if (realdn) { |
| 825 | dout("dn %p (%d) spliced with %p (%d) " |
| 826 | "inode %p ino %llx.%llx\n", |
| 827 | dn, atomic_read(&dn->d_count), |
| 828 | realdn, atomic_read(&realdn->d_count), |
| 829 | realdn->d_inode, ceph_vinop(realdn->d_inode)); |
| 830 | dput(dn); |
| 831 | dn = realdn; |
| 832 | } else { |
| 833 | BUG_ON(!ceph_dentry(dn)); |
| 834 | |
| 835 | dout("dn %p attached to %p ino %llx.%llx\n", |
| 836 | dn, dn->d_inode, ceph_vinop(dn->d_inode)); |
| 837 | } |
| 838 | if ((!prehash || *prehash) && d_unhashed(dn)) |
| 839 | d_rehash(dn); |
| 840 | out: |
| 841 | return dn; |
| 842 | } |
| 843 | |
| 844 | /* |
Yehuda Sadeh | 4baa75e | 2010-01-07 15:36:32 -0800 | [diff] [blame] | 845 | * Set dentry's directory position based on the current dir's max, and |
| 846 | * order it in d_subdirs, so that dcache_readdir behaves. |
| 847 | */ |
| 848 | static void ceph_set_dentry_offset(struct dentry *dn) |
| 849 | { |
| 850 | struct dentry *dir = dn->d_parent; |
| 851 | struct inode *inode = dn->d_parent->d_inode; |
| 852 | struct ceph_dentry_info *di; |
| 853 | |
| 854 | BUG_ON(!inode); |
| 855 | |
| 856 | di = ceph_dentry(dn); |
| 857 | |
| 858 | spin_lock(&inode->i_lock); |
| 859 | di->offset = ceph_inode(inode)->i_max_offset++; |
| 860 | spin_unlock(&inode->i_lock); |
| 861 | |
| 862 | spin_lock(&dcache_lock); |
| 863 | spin_lock(&dn->d_lock); |
| 864 | list_move_tail(&dir->d_subdirs, &dn->d_u.d_child); |
| 865 | dout("set_dentry_offset %p %lld (%p %p)\n", dn, di->offset, |
| 866 | dn->d_u.d_child.prev, dn->d_u.d_child.next); |
| 867 | spin_unlock(&dn->d_lock); |
| 868 | spin_unlock(&dcache_lock); |
| 869 | } |
| 870 | |
| 871 | /* |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 872 | * Incorporate results into the local cache. This is either just |
| 873 | * one inode, or a directory, dentry, and possibly linked-to inode (e.g., |
| 874 | * after a lookup). |
| 875 | * |
| 876 | * A reply may contain |
| 877 | * a directory inode along with a dentry. |
| 878 | * and/or a target inode |
| 879 | * |
| 880 | * Called with snap_rwsem (read). |
| 881 | */ |
| 882 | int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req, |
| 883 | struct ceph_mds_session *session) |
| 884 | { |
| 885 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; |
| 886 | struct inode *in = NULL; |
| 887 | struct ceph_mds_reply_inode *ininfo; |
| 888 | struct ceph_vino vino; |
| 889 | int i = 0; |
| 890 | int err = 0; |
| 891 | |
| 892 | dout("fill_trace %p is_dentry %d is_target %d\n", req, |
| 893 | rinfo->head->is_dentry, rinfo->head->is_target); |
| 894 | |
| 895 | #if 0 |
| 896 | /* |
| 897 | * Debugging hook: |
| 898 | * |
| 899 | * If we resend completed ops to a recovering mds, we get no |
| 900 | * trace. Since that is very rare, pretend this is the case |
| 901 | * to ensure the 'no trace' handlers in the callers behave. |
| 902 | * |
| 903 | * Fill in inodes unconditionally to avoid breaking cap |
| 904 | * invariants. |
| 905 | */ |
| 906 | if (rinfo->head->op & CEPH_MDS_OP_WRITE) { |
| 907 | pr_info("fill_trace faking empty trace on %lld %s\n", |
| 908 | req->r_tid, ceph_mds_op_name(rinfo->head->op)); |
| 909 | if (rinfo->head->is_dentry) { |
| 910 | rinfo->head->is_dentry = 0; |
| 911 | err = fill_inode(req->r_locked_dir, |
| 912 | &rinfo->diri, rinfo->dirfrag, |
| 913 | session, req->r_request_started, -1); |
| 914 | } |
| 915 | if (rinfo->head->is_target) { |
| 916 | rinfo->head->is_target = 0; |
| 917 | ininfo = rinfo->targeti.in; |
| 918 | vino.ino = le64_to_cpu(ininfo->ino); |
| 919 | vino.snap = le64_to_cpu(ininfo->snapid); |
| 920 | in = ceph_get_inode(sb, vino); |
| 921 | err = fill_inode(in, &rinfo->targeti, NULL, |
| 922 | session, req->r_request_started, |
| 923 | req->r_fmode); |
| 924 | iput(in); |
| 925 | } |
| 926 | } |
| 927 | #endif |
| 928 | |
| 929 | if (!rinfo->head->is_target && !rinfo->head->is_dentry) { |
| 930 | dout("fill_trace reply is empty!\n"); |
| 931 | if (rinfo->head->result == 0 && req->r_locked_dir) { |
| 932 | struct ceph_inode_info *ci = |
| 933 | ceph_inode(req->r_locked_dir); |
| 934 | dout(" clearing %p complete (empty trace)\n", |
| 935 | req->r_locked_dir); |
| 936 | ci->i_ceph_flags &= ~CEPH_I_COMPLETE; |
| 937 | ci->i_release_count++; |
| 938 | } |
| 939 | return 0; |
| 940 | } |
| 941 | |
| 942 | if (rinfo->head->is_dentry) { |
Sage Weil | 5b1daec | 2010-01-25 11:33:08 -0800 | [diff] [blame] | 943 | struct inode *dir = req->r_locked_dir; |
| 944 | |
| 945 | err = fill_inode(dir, &rinfo->diri, rinfo->dirfrag, |
| 946 | session, req->r_request_started, -1, |
| 947 | &req->r_caps_reservation); |
| 948 | if (err < 0) |
| 949 | return err; |
| 950 | } |
| 951 | |
| 952 | if (rinfo->head->is_dentry && !req->r_aborted) { |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 953 | /* |
| 954 | * lookup link rename : null -> possibly existing inode |
| 955 | * mknod symlink mkdir : null -> new inode |
| 956 | * unlink : linked -> null |
| 957 | */ |
| 958 | struct inode *dir = req->r_locked_dir; |
| 959 | struct dentry *dn = req->r_dentry; |
| 960 | bool have_dir_cap, have_lease; |
| 961 | |
| 962 | BUG_ON(!dn); |
| 963 | BUG_ON(!dir); |
| 964 | BUG_ON(dn->d_parent->d_inode != dir); |
| 965 | BUG_ON(ceph_ino(dir) != |
| 966 | le64_to_cpu(rinfo->diri.in->ino)); |
| 967 | BUG_ON(ceph_snap(dir) != |
| 968 | le64_to_cpu(rinfo->diri.in->snapid)); |
| 969 | |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 970 | /* do we have a lease on the whole dir? */ |
| 971 | have_dir_cap = |
| 972 | (le32_to_cpu(rinfo->diri.in->cap.caps) & |
| 973 | CEPH_CAP_FILE_SHARED); |
| 974 | |
| 975 | /* do we have a dn lease? */ |
| 976 | have_lease = have_dir_cap || |
| 977 | (le16_to_cpu(rinfo->dlease->mask) & |
| 978 | CEPH_LOCK_DN); |
| 979 | |
| 980 | if (!have_lease) |
| 981 | dout("fill_trace no dentry lease or dir cap\n"); |
| 982 | |
| 983 | /* rename? */ |
| 984 | if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) { |
| 985 | dout(" src %p '%.*s' dst %p '%.*s'\n", |
| 986 | req->r_old_dentry, |
| 987 | req->r_old_dentry->d_name.len, |
| 988 | req->r_old_dentry->d_name.name, |
| 989 | dn, dn->d_name.len, dn->d_name.name); |
| 990 | dout("fill_trace doing d_move %p -> %p\n", |
| 991 | req->r_old_dentry, dn); |
| 992 | d_move(req->r_old_dentry, dn); |
| 993 | dout(" src %p '%.*s' dst %p '%.*s'\n", |
| 994 | req->r_old_dentry, |
| 995 | req->r_old_dentry->d_name.len, |
| 996 | req->r_old_dentry->d_name.name, |
| 997 | dn, dn->d_name.len, dn->d_name.name); |
Sage Weil | c4a29f2 | 2009-12-21 11:42:18 -0800 | [diff] [blame] | 998 | /* ensure target dentry is invalidated, despite |
| 999 | rehashing bug in vfs_rename_dir */ |
| 1000 | dn->d_time = jiffies; |
| 1001 | ceph_dentry(dn)->lease_shared_gen = 0; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1002 | /* take overwritten dentry's readdir offset */ |
| 1003 | ceph_dentry(req->r_old_dentry)->offset = |
| 1004 | ceph_dentry(dn)->offset; |
| 1005 | dn = req->r_old_dentry; /* use old_dentry */ |
| 1006 | in = dn->d_inode; |
| 1007 | } |
| 1008 | |
| 1009 | /* null dentry? */ |
| 1010 | if (!rinfo->head->is_target) { |
| 1011 | dout("fill_trace null dentry\n"); |
| 1012 | if (dn->d_inode) { |
| 1013 | dout("d_delete %p\n", dn); |
| 1014 | d_delete(dn); |
| 1015 | } else { |
| 1016 | dout("d_instantiate %p NULL\n", dn); |
| 1017 | d_instantiate(dn, NULL); |
| 1018 | if (have_lease && d_unhashed(dn)) |
| 1019 | d_rehash(dn); |
| 1020 | update_dentry_lease(dn, rinfo->dlease, |
| 1021 | session, |
| 1022 | req->r_request_started); |
| 1023 | } |
| 1024 | goto done; |
| 1025 | } |
| 1026 | |
| 1027 | /* attach proper inode */ |
| 1028 | ininfo = rinfo->targeti.in; |
| 1029 | vino.ino = le64_to_cpu(ininfo->ino); |
| 1030 | vino.snap = le64_to_cpu(ininfo->snapid); |
| 1031 | if (!dn->d_inode) { |
| 1032 | in = ceph_get_inode(sb, vino); |
| 1033 | if (IS_ERR(in)) { |
| 1034 | pr_err("fill_trace bad get_inode " |
| 1035 | "%llx.%llx\n", vino.ino, vino.snap); |
| 1036 | err = PTR_ERR(in); |
| 1037 | d_delete(dn); |
| 1038 | goto done; |
| 1039 | } |
| 1040 | dn = splice_dentry(dn, in, &have_lease); |
| 1041 | if (IS_ERR(dn)) { |
| 1042 | err = PTR_ERR(dn); |
| 1043 | goto done; |
| 1044 | } |
| 1045 | req->r_dentry = dn; /* may have spliced */ |
Yehuda Sadeh | 4baa75e | 2010-01-07 15:36:32 -0800 | [diff] [blame] | 1046 | ceph_set_dentry_offset(dn); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1047 | igrab(in); |
| 1048 | } else if (ceph_ino(in) == vino.ino && |
| 1049 | ceph_snap(in) == vino.snap) { |
| 1050 | igrab(in); |
| 1051 | } else { |
| 1052 | dout(" %p links to %p %llx.%llx, not %llx.%llx\n", |
| 1053 | dn, in, ceph_ino(in), ceph_snap(in), |
| 1054 | vino.ino, vino.snap); |
| 1055 | have_lease = false; |
| 1056 | in = NULL; |
| 1057 | } |
| 1058 | |
| 1059 | if (have_lease) |
| 1060 | update_dentry_lease(dn, rinfo->dlease, session, |
| 1061 | req->r_request_started); |
| 1062 | dout(" final dn %p\n", dn); |
| 1063 | i++; |
| 1064 | } else if (req->r_op == CEPH_MDS_OP_LOOKUPSNAP || |
| 1065 | req->r_op == CEPH_MDS_OP_MKSNAP) { |
| 1066 | struct dentry *dn = req->r_dentry; |
| 1067 | |
| 1068 | /* fill out a snapdir LOOKUPSNAP dentry */ |
| 1069 | BUG_ON(!dn); |
| 1070 | BUG_ON(!req->r_locked_dir); |
| 1071 | BUG_ON(ceph_snap(req->r_locked_dir) != CEPH_SNAPDIR); |
| 1072 | ininfo = rinfo->targeti.in; |
| 1073 | vino.ino = le64_to_cpu(ininfo->ino); |
| 1074 | vino.snap = le64_to_cpu(ininfo->snapid); |
| 1075 | in = ceph_get_inode(sb, vino); |
| 1076 | if (IS_ERR(in)) { |
| 1077 | pr_err("fill_inode get_inode badness %llx.%llx\n", |
| 1078 | vino.ino, vino.snap); |
| 1079 | err = PTR_ERR(in); |
| 1080 | d_delete(dn); |
| 1081 | goto done; |
| 1082 | } |
| 1083 | dout(" linking snapped dir %p to dn %p\n", in, dn); |
| 1084 | dn = splice_dentry(dn, in, NULL); |
| 1085 | if (IS_ERR(dn)) { |
| 1086 | err = PTR_ERR(dn); |
| 1087 | goto done; |
| 1088 | } |
Yehuda Sadeh | 4baa75e | 2010-01-07 15:36:32 -0800 | [diff] [blame] | 1089 | ceph_set_dentry_offset(dn); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1090 | req->r_dentry = dn; /* may have spliced */ |
| 1091 | igrab(in); |
| 1092 | rinfo->head->is_dentry = 1; /* fool notrace handlers */ |
| 1093 | } |
| 1094 | |
| 1095 | if (rinfo->head->is_target) { |
| 1096 | vino.ino = le64_to_cpu(rinfo->targeti.in->ino); |
| 1097 | vino.snap = le64_to_cpu(rinfo->targeti.in->snapid); |
| 1098 | |
| 1099 | if (in == NULL || ceph_ino(in) != vino.ino || |
| 1100 | ceph_snap(in) != vino.snap) { |
| 1101 | in = ceph_get_inode(sb, vino); |
| 1102 | if (IS_ERR(in)) { |
| 1103 | err = PTR_ERR(in); |
| 1104 | goto done; |
| 1105 | } |
| 1106 | } |
| 1107 | req->r_target_inode = in; |
| 1108 | |
| 1109 | err = fill_inode(in, |
| 1110 | &rinfo->targeti, NULL, |
| 1111 | session, req->r_request_started, |
| 1112 | (le32_to_cpu(rinfo->head->result) == 0) ? |
| 1113 | req->r_fmode : -1, |
| 1114 | &req->r_caps_reservation); |
| 1115 | if (err < 0) { |
| 1116 | pr_err("fill_inode badness %p %llx.%llx\n", |
| 1117 | in, ceph_vinop(in)); |
| 1118 | goto done; |
| 1119 | } |
| 1120 | } |
| 1121 | |
| 1122 | done: |
| 1123 | dout("fill_trace done err=%d\n", err); |
| 1124 | return err; |
| 1125 | } |
| 1126 | |
| 1127 | /* |
| 1128 | * Prepopulate our cache with readdir results, leases, etc. |
| 1129 | */ |
| 1130 | int ceph_readdir_prepopulate(struct ceph_mds_request *req, |
| 1131 | struct ceph_mds_session *session) |
| 1132 | { |
| 1133 | struct dentry *parent = req->r_dentry; |
| 1134 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; |
| 1135 | struct qstr dname; |
| 1136 | struct dentry *dn; |
| 1137 | struct inode *in; |
| 1138 | int err = 0, i; |
| 1139 | struct inode *snapdir = NULL; |
| 1140 | struct ceph_mds_request_head *rhead = req->r_request->front.iov_base; |
| 1141 | u64 frag = le32_to_cpu(rhead->args.readdir.frag); |
| 1142 | struct ceph_dentry_info *di; |
| 1143 | |
| 1144 | if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) { |
| 1145 | snapdir = ceph_get_snapdir(parent->d_inode); |
| 1146 | parent = d_find_alias(snapdir); |
| 1147 | dout("readdir_prepopulate %d items under SNAPDIR dn %p\n", |
| 1148 | rinfo->dir_nr, parent); |
| 1149 | } else { |
| 1150 | dout("readdir_prepopulate %d items under dn %p\n", |
| 1151 | rinfo->dir_nr, parent); |
| 1152 | if (rinfo->dir_dir) |
| 1153 | ceph_fill_dirfrag(parent->d_inode, rinfo->dir_dir); |
| 1154 | } |
| 1155 | |
| 1156 | for (i = 0; i < rinfo->dir_nr; i++) { |
| 1157 | struct ceph_vino vino; |
| 1158 | |
| 1159 | dname.name = rinfo->dir_dname[i]; |
| 1160 | dname.len = rinfo->dir_dname_len[i]; |
| 1161 | dname.hash = full_name_hash(dname.name, dname.len); |
| 1162 | |
| 1163 | vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino); |
| 1164 | vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid); |
| 1165 | |
| 1166 | retry_lookup: |
| 1167 | dn = d_lookup(parent, &dname); |
| 1168 | dout("d_lookup on parent=%p name=%.*s got %p\n", |
| 1169 | parent, dname.len, dname.name, dn); |
| 1170 | |
| 1171 | if (!dn) { |
| 1172 | dn = d_alloc(parent, &dname); |
| 1173 | dout("d_alloc %p '%.*s' = %p\n", parent, |
| 1174 | dname.len, dname.name, dn); |
| 1175 | if (dn == NULL) { |
| 1176 | dout("d_alloc badness\n"); |
| 1177 | err = -ENOMEM; |
| 1178 | goto out; |
| 1179 | } |
| 1180 | err = ceph_init_dentry(dn); |
| 1181 | if (err < 0) |
| 1182 | goto out; |
| 1183 | } else if (dn->d_inode && |
| 1184 | (ceph_ino(dn->d_inode) != vino.ino || |
| 1185 | ceph_snap(dn->d_inode) != vino.snap)) { |
| 1186 | dout(" dn %p points to wrong inode %p\n", |
| 1187 | dn, dn->d_inode); |
| 1188 | d_delete(dn); |
| 1189 | dput(dn); |
| 1190 | goto retry_lookup; |
| 1191 | } else { |
| 1192 | /* reorder parent's d_subdirs */ |
| 1193 | spin_lock(&dcache_lock); |
| 1194 | spin_lock(&dn->d_lock); |
| 1195 | list_move(&dn->d_u.d_child, &parent->d_subdirs); |
| 1196 | spin_unlock(&dn->d_lock); |
| 1197 | spin_unlock(&dcache_lock); |
| 1198 | } |
| 1199 | |
| 1200 | di = dn->d_fsdata; |
| 1201 | di->offset = ceph_make_fpos(frag, i + req->r_readdir_offset); |
| 1202 | |
| 1203 | /* inode */ |
| 1204 | if (dn->d_inode) { |
| 1205 | in = dn->d_inode; |
| 1206 | } else { |
| 1207 | in = ceph_get_inode(parent->d_sb, vino); |
| 1208 | if (in == NULL) { |
| 1209 | dout("new_inode badness\n"); |
| 1210 | d_delete(dn); |
| 1211 | dput(dn); |
| 1212 | err = -ENOMEM; |
| 1213 | goto out; |
| 1214 | } |
| 1215 | dn = splice_dentry(dn, in, NULL); |
| 1216 | } |
| 1217 | |
| 1218 | if (fill_inode(in, &rinfo->dir_in[i], NULL, session, |
| 1219 | req->r_request_started, -1, |
| 1220 | &req->r_caps_reservation) < 0) { |
| 1221 | pr_err("fill_inode badness on %p\n", in); |
| 1222 | dput(dn); |
| 1223 | continue; |
| 1224 | } |
| 1225 | update_dentry_lease(dn, rinfo->dir_dlease[i], |
| 1226 | req->r_session, req->r_request_started); |
| 1227 | dput(dn); |
| 1228 | } |
| 1229 | req->r_did_prepopulate = true; |
| 1230 | |
| 1231 | out: |
| 1232 | if (snapdir) { |
| 1233 | iput(snapdir); |
| 1234 | dput(parent); |
| 1235 | } |
| 1236 | dout("readdir_prepopulate done\n"); |
| 1237 | return err; |
| 1238 | } |
| 1239 | |
| 1240 | int ceph_inode_set_size(struct inode *inode, loff_t size) |
| 1241 | { |
| 1242 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 1243 | int ret = 0; |
| 1244 | |
| 1245 | spin_lock(&inode->i_lock); |
| 1246 | dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size); |
| 1247 | inode->i_size = size; |
| 1248 | inode->i_blocks = (size + (1 << 9) - 1) >> 9; |
| 1249 | |
| 1250 | /* tell the MDS if we are approaching max_size */ |
| 1251 | if ((size << 1) >= ci->i_max_size && |
| 1252 | (ci->i_reported_size << 1) < ci->i_max_size) |
| 1253 | ret = 1; |
| 1254 | |
| 1255 | spin_unlock(&inode->i_lock); |
| 1256 | return ret; |
| 1257 | } |
| 1258 | |
| 1259 | /* |
| 1260 | * Write back inode data in a worker thread. (This can't be done |
| 1261 | * in the message handler context.) |
| 1262 | */ |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 1263 | void ceph_queue_writeback(struct inode *inode) |
| 1264 | { |
| 1265 | if (queue_work(ceph_inode_to_client(inode)->wb_wq, |
| 1266 | &ceph_inode(inode)->i_wb_work)) { |
Sage Weil | 2c27c9a | 2010-02-17 15:45:51 -0800 | [diff] [blame] | 1267 | dout("ceph_queue_writeback %p\n", inode); |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 1268 | igrab(inode); |
| 1269 | } else { |
Sage Weil | 2c27c9a | 2010-02-17 15:45:51 -0800 | [diff] [blame] | 1270 | dout("ceph_queue_writeback %p failed\n", inode); |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 1271 | } |
| 1272 | } |
| 1273 | |
| 1274 | static void ceph_writeback_work(struct work_struct *work) |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1275 | { |
| 1276 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, |
| 1277 | i_wb_work); |
| 1278 | struct inode *inode = &ci->vfs_inode; |
| 1279 | |
| 1280 | dout("writeback %p\n", inode); |
| 1281 | filemap_fdatawrite(&inode->i_data); |
| 1282 | iput(inode); |
| 1283 | } |
| 1284 | |
| 1285 | /* |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 1286 | * queue an async invalidation |
| 1287 | */ |
| 1288 | void ceph_queue_invalidate(struct inode *inode) |
| 1289 | { |
| 1290 | if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq, |
| 1291 | &ceph_inode(inode)->i_pg_inv_work)) { |
| 1292 | dout("ceph_queue_invalidate %p\n", inode); |
| 1293 | igrab(inode); |
| 1294 | } else { |
| 1295 | dout("ceph_queue_invalidate %p failed\n", inode); |
| 1296 | } |
| 1297 | } |
| 1298 | |
| 1299 | /* |
Yehuda Sadeh | c9af9fb | 2010-02-19 00:10:11 +0000 | [diff] [blame] | 1300 | * invalidate any pages that are not dirty or under writeback. this |
| 1301 | * includes pages that are clean and mapped. |
| 1302 | */ |
| 1303 | static void ceph_invalidate_nondirty_pages(struct address_space *mapping) |
| 1304 | { |
| 1305 | struct pagevec pvec; |
| 1306 | pgoff_t next = 0; |
| 1307 | int i; |
| 1308 | |
| 1309 | pagevec_init(&pvec, 0); |
| 1310 | while (pagevec_lookup(&pvec, mapping, next, PAGEVEC_SIZE)) { |
| 1311 | for (i = 0; i < pagevec_count(&pvec); i++) { |
| 1312 | struct page *page = pvec.pages[i]; |
| 1313 | pgoff_t index; |
| 1314 | int skip_page = |
| 1315 | (PageDirty(page) || PageWriteback(page)); |
| 1316 | |
| 1317 | if (!skip_page) |
| 1318 | skip_page = !trylock_page(page); |
| 1319 | |
| 1320 | /* |
| 1321 | * We really shouldn't be looking at the ->index of an |
| 1322 | * unlocked page. But we're not allowed to lock these |
| 1323 | * pages. So we rely upon nobody altering the ->index |
| 1324 | * of this (pinned-by-us) page. |
| 1325 | */ |
| 1326 | index = page->index; |
| 1327 | if (index > next) |
| 1328 | next = index; |
| 1329 | next++; |
| 1330 | |
| 1331 | if (skip_page) |
| 1332 | continue; |
| 1333 | |
| 1334 | generic_error_remove_page(mapping, page); |
| 1335 | unlock_page(page); |
| 1336 | } |
| 1337 | pagevec_release(&pvec); |
| 1338 | cond_resched(); |
| 1339 | } |
| 1340 | } |
| 1341 | |
| 1342 | /* |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1343 | * Invalidate inode pages in a worker thread. (This can't be done |
| 1344 | * in the message handler context.) |
| 1345 | */ |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 1346 | static void ceph_invalidate_work(struct work_struct *work) |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1347 | { |
| 1348 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, |
| 1349 | i_pg_inv_work); |
| 1350 | struct inode *inode = &ci->vfs_inode; |
| 1351 | u32 orig_gen; |
| 1352 | int check = 0; |
| 1353 | |
| 1354 | spin_lock(&inode->i_lock); |
| 1355 | dout("invalidate_pages %p gen %d revoking %d\n", inode, |
| 1356 | ci->i_rdcache_gen, ci->i_rdcache_revoking); |
| 1357 | if (ci->i_rdcache_gen == 0 || |
| 1358 | ci->i_rdcache_revoking != ci->i_rdcache_gen) { |
| 1359 | BUG_ON(ci->i_rdcache_revoking > ci->i_rdcache_gen); |
| 1360 | /* nevermind! */ |
| 1361 | ci->i_rdcache_revoking = 0; |
| 1362 | spin_unlock(&inode->i_lock); |
| 1363 | goto out; |
| 1364 | } |
| 1365 | orig_gen = ci->i_rdcache_gen; |
| 1366 | spin_unlock(&inode->i_lock); |
| 1367 | |
Yehuda Sadeh | c9af9fb | 2010-02-19 00:10:11 +0000 | [diff] [blame] | 1368 | ceph_invalidate_nondirty_pages(inode->i_mapping); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1369 | |
| 1370 | spin_lock(&inode->i_lock); |
| 1371 | if (orig_gen == ci->i_rdcache_gen) { |
| 1372 | dout("invalidate_pages %p gen %d successful\n", inode, |
| 1373 | ci->i_rdcache_gen); |
| 1374 | ci->i_rdcache_gen = 0; |
| 1375 | ci->i_rdcache_revoking = 0; |
| 1376 | check = 1; |
| 1377 | } else { |
| 1378 | dout("invalidate_pages %p gen %d raced, gen now %d\n", |
| 1379 | inode, orig_gen, ci->i_rdcache_gen); |
| 1380 | } |
| 1381 | spin_unlock(&inode->i_lock); |
| 1382 | |
| 1383 | if (check) |
| 1384 | ceph_check_caps(ci, 0, NULL); |
| 1385 | out: |
| 1386 | iput(inode); |
| 1387 | } |
| 1388 | |
| 1389 | |
| 1390 | /* |
| 1391 | * called by trunc_wq; take i_mutex ourselves |
| 1392 | * |
| 1393 | * We also truncate in a separate thread as well. |
| 1394 | */ |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 1395 | static void ceph_vmtruncate_work(struct work_struct *work) |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1396 | { |
| 1397 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, |
| 1398 | i_vmtruncate_work); |
| 1399 | struct inode *inode = &ci->vfs_inode; |
| 1400 | |
| 1401 | dout("vmtruncate_work %p\n", inode); |
| 1402 | mutex_lock(&inode->i_mutex); |
| 1403 | __ceph_do_pending_vmtruncate(inode); |
| 1404 | mutex_unlock(&inode->i_mutex); |
| 1405 | iput(inode); |
| 1406 | } |
| 1407 | |
| 1408 | /* |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 1409 | * Queue an async vmtruncate. If we fail to queue work, we will handle |
| 1410 | * the truncation the next time we call __ceph_do_pending_vmtruncate. |
| 1411 | */ |
| 1412 | void ceph_queue_vmtruncate(struct inode *inode) |
| 1413 | { |
| 1414 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 1415 | |
| 1416 | if (queue_work(ceph_client(inode->i_sb)->trunc_wq, |
| 1417 | &ci->i_vmtruncate_work)) { |
| 1418 | dout("ceph_queue_vmtruncate %p\n", inode); |
| 1419 | igrab(inode); |
| 1420 | } else { |
| 1421 | dout("ceph_queue_vmtruncate %p failed, pending=%d\n", |
| 1422 | inode, ci->i_truncate_pending); |
| 1423 | } |
| 1424 | } |
| 1425 | |
| 1426 | /* |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1427 | * called with i_mutex held. |
| 1428 | * |
| 1429 | * Make sure any pending truncation is applied before doing anything |
| 1430 | * that may depend on it. |
| 1431 | */ |
| 1432 | void __ceph_do_pending_vmtruncate(struct inode *inode) |
| 1433 | { |
| 1434 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 1435 | u64 to; |
| 1436 | int wrbuffer_refs, wake = 0; |
| 1437 | |
| 1438 | retry: |
| 1439 | spin_lock(&inode->i_lock); |
| 1440 | if (ci->i_truncate_pending == 0) { |
| 1441 | dout("__do_pending_vmtruncate %p none pending\n", inode); |
| 1442 | spin_unlock(&inode->i_lock); |
| 1443 | return; |
| 1444 | } |
| 1445 | |
| 1446 | /* |
| 1447 | * make sure any dirty snapped pages are flushed before we |
| 1448 | * possibly truncate them.. so write AND block! |
| 1449 | */ |
| 1450 | if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) { |
| 1451 | dout("__do_pending_vmtruncate %p flushing snaps first\n", |
| 1452 | inode); |
| 1453 | spin_unlock(&inode->i_lock); |
| 1454 | filemap_write_and_wait_range(&inode->i_data, 0, |
| 1455 | inode->i_sb->s_maxbytes); |
| 1456 | goto retry; |
| 1457 | } |
| 1458 | |
| 1459 | to = ci->i_truncate_size; |
| 1460 | wrbuffer_refs = ci->i_wrbuffer_ref; |
| 1461 | dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode, |
| 1462 | ci->i_truncate_pending, to); |
| 1463 | spin_unlock(&inode->i_lock); |
| 1464 | |
| 1465 | truncate_inode_pages(inode->i_mapping, to); |
| 1466 | |
| 1467 | spin_lock(&inode->i_lock); |
| 1468 | ci->i_truncate_pending--; |
| 1469 | if (ci->i_truncate_pending == 0) |
| 1470 | wake = 1; |
| 1471 | spin_unlock(&inode->i_lock); |
| 1472 | |
| 1473 | if (wrbuffer_refs == 0) |
| 1474 | ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); |
| 1475 | if (wake) |
| 1476 | wake_up(&ci->i_cap_wq); |
| 1477 | } |
| 1478 | |
| 1479 | |
| 1480 | /* |
| 1481 | * symlinks |
| 1482 | */ |
| 1483 | static void *ceph_sym_follow_link(struct dentry *dentry, struct nameidata *nd) |
| 1484 | { |
| 1485 | struct ceph_inode_info *ci = ceph_inode(dentry->d_inode); |
| 1486 | nd_set_link(nd, ci->i_symlink); |
| 1487 | return NULL; |
| 1488 | } |
| 1489 | |
| 1490 | static const struct inode_operations ceph_symlink_iops = { |
| 1491 | .readlink = generic_readlink, |
| 1492 | .follow_link = ceph_sym_follow_link, |
| 1493 | }; |
| 1494 | |
| 1495 | /* |
| 1496 | * setattr |
| 1497 | */ |
| 1498 | int ceph_setattr(struct dentry *dentry, struct iattr *attr) |
| 1499 | { |
| 1500 | struct inode *inode = dentry->d_inode; |
| 1501 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 1502 | struct inode *parent_inode = dentry->d_parent->d_inode; |
| 1503 | const unsigned int ia_valid = attr->ia_valid; |
| 1504 | struct ceph_mds_request *req; |
| 1505 | struct ceph_mds_client *mdsc = &ceph_client(dentry->d_sb)->mdsc; |
| 1506 | int issued; |
| 1507 | int release = 0, dirtied = 0; |
| 1508 | int mask = 0; |
| 1509 | int err = 0; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1510 | |
| 1511 | if (ceph_snap(inode) != CEPH_NOSNAP) |
| 1512 | return -EROFS; |
| 1513 | |
| 1514 | __ceph_do_pending_vmtruncate(inode); |
| 1515 | |
| 1516 | err = inode_change_ok(inode, attr); |
| 1517 | if (err != 0) |
| 1518 | return err; |
| 1519 | |
| 1520 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR, |
| 1521 | USE_AUTH_MDS); |
| 1522 | if (IS_ERR(req)) |
| 1523 | return PTR_ERR(req); |
| 1524 | |
| 1525 | spin_lock(&inode->i_lock); |
| 1526 | issued = __ceph_caps_issued(ci, NULL); |
| 1527 | dout("setattr %p issued %s\n", inode, ceph_cap_string(issued)); |
| 1528 | |
| 1529 | if (ia_valid & ATTR_UID) { |
| 1530 | dout("setattr %p uid %d -> %d\n", inode, |
| 1531 | inode->i_uid, attr->ia_uid); |
| 1532 | if (issued & CEPH_CAP_AUTH_EXCL) { |
| 1533 | inode->i_uid = attr->ia_uid; |
| 1534 | dirtied |= CEPH_CAP_AUTH_EXCL; |
| 1535 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || |
| 1536 | attr->ia_uid != inode->i_uid) { |
| 1537 | req->r_args.setattr.uid = cpu_to_le32(attr->ia_uid); |
| 1538 | mask |= CEPH_SETATTR_UID; |
| 1539 | release |= CEPH_CAP_AUTH_SHARED; |
| 1540 | } |
| 1541 | } |
| 1542 | if (ia_valid & ATTR_GID) { |
| 1543 | dout("setattr %p gid %d -> %d\n", inode, |
| 1544 | inode->i_gid, attr->ia_gid); |
| 1545 | if (issued & CEPH_CAP_AUTH_EXCL) { |
| 1546 | inode->i_gid = attr->ia_gid; |
| 1547 | dirtied |= CEPH_CAP_AUTH_EXCL; |
| 1548 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || |
| 1549 | attr->ia_gid != inode->i_gid) { |
| 1550 | req->r_args.setattr.gid = cpu_to_le32(attr->ia_gid); |
| 1551 | mask |= CEPH_SETATTR_GID; |
| 1552 | release |= CEPH_CAP_AUTH_SHARED; |
| 1553 | } |
| 1554 | } |
| 1555 | if (ia_valid & ATTR_MODE) { |
| 1556 | dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode, |
| 1557 | attr->ia_mode); |
| 1558 | if (issued & CEPH_CAP_AUTH_EXCL) { |
| 1559 | inode->i_mode = attr->ia_mode; |
| 1560 | dirtied |= CEPH_CAP_AUTH_EXCL; |
| 1561 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || |
| 1562 | attr->ia_mode != inode->i_mode) { |
| 1563 | req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode); |
| 1564 | mask |= CEPH_SETATTR_MODE; |
| 1565 | release |= CEPH_CAP_AUTH_SHARED; |
| 1566 | } |
| 1567 | } |
| 1568 | |
| 1569 | if (ia_valid & ATTR_ATIME) { |
| 1570 | dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode, |
| 1571 | inode->i_atime.tv_sec, inode->i_atime.tv_nsec, |
| 1572 | attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec); |
| 1573 | if (issued & CEPH_CAP_FILE_EXCL) { |
| 1574 | ci->i_time_warp_seq++; |
| 1575 | inode->i_atime = attr->ia_atime; |
| 1576 | dirtied |= CEPH_CAP_FILE_EXCL; |
| 1577 | } else if ((issued & CEPH_CAP_FILE_WR) && |
| 1578 | timespec_compare(&inode->i_atime, |
| 1579 | &attr->ia_atime) < 0) { |
| 1580 | inode->i_atime = attr->ia_atime; |
| 1581 | dirtied |= CEPH_CAP_FILE_WR; |
| 1582 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || |
| 1583 | !timespec_equal(&inode->i_atime, &attr->ia_atime)) { |
| 1584 | ceph_encode_timespec(&req->r_args.setattr.atime, |
| 1585 | &attr->ia_atime); |
| 1586 | mask |= CEPH_SETATTR_ATIME; |
| 1587 | release |= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD | |
| 1588 | CEPH_CAP_FILE_WR; |
| 1589 | } |
| 1590 | } |
| 1591 | if (ia_valid & ATTR_MTIME) { |
| 1592 | dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode, |
| 1593 | inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, |
| 1594 | attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec); |
| 1595 | if (issued & CEPH_CAP_FILE_EXCL) { |
| 1596 | ci->i_time_warp_seq++; |
| 1597 | inode->i_mtime = attr->ia_mtime; |
| 1598 | dirtied |= CEPH_CAP_FILE_EXCL; |
| 1599 | } else if ((issued & CEPH_CAP_FILE_WR) && |
| 1600 | timespec_compare(&inode->i_mtime, |
| 1601 | &attr->ia_mtime) < 0) { |
| 1602 | inode->i_mtime = attr->ia_mtime; |
| 1603 | dirtied |= CEPH_CAP_FILE_WR; |
| 1604 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || |
| 1605 | !timespec_equal(&inode->i_mtime, &attr->ia_mtime)) { |
| 1606 | ceph_encode_timespec(&req->r_args.setattr.mtime, |
| 1607 | &attr->ia_mtime); |
| 1608 | mask |= CEPH_SETATTR_MTIME; |
| 1609 | release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | |
| 1610 | CEPH_CAP_FILE_WR; |
| 1611 | } |
| 1612 | } |
| 1613 | if (ia_valid & ATTR_SIZE) { |
| 1614 | dout("setattr %p size %lld -> %lld\n", inode, |
| 1615 | inode->i_size, attr->ia_size); |
| 1616 | if (attr->ia_size > inode->i_sb->s_maxbytes) { |
| 1617 | err = -EINVAL; |
| 1618 | goto out; |
| 1619 | } |
| 1620 | if ((issued & CEPH_CAP_FILE_EXCL) && |
| 1621 | attr->ia_size > inode->i_size) { |
| 1622 | inode->i_size = attr->ia_size; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1623 | inode->i_blocks = |
| 1624 | (attr->ia_size + (1 << 9) - 1) >> 9; |
| 1625 | inode->i_ctime = attr->ia_ctime; |
| 1626 | ci->i_reported_size = attr->ia_size; |
| 1627 | dirtied |= CEPH_CAP_FILE_EXCL; |
| 1628 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || |
| 1629 | attr->ia_size != inode->i_size) { |
| 1630 | req->r_args.setattr.size = cpu_to_le64(attr->ia_size); |
| 1631 | req->r_args.setattr.old_size = |
| 1632 | cpu_to_le64(inode->i_size); |
| 1633 | mask |= CEPH_SETATTR_SIZE; |
| 1634 | release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | |
| 1635 | CEPH_CAP_FILE_WR; |
| 1636 | } |
| 1637 | } |
| 1638 | |
| 1639 | /* these do nothing */ |
| 1640 | if (ia_valid & ATTR_CTIME) { |
| 1641 | bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME| |
| 1642 | ATTR_MODE|ATTR_UID|ATTR_GID)) == 0; |
| 1643 | dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode, |
| 1644 | inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, |
| 1645 | attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec, |
| 1646 | only ? "ctime only" : "ignored"); |
| 1647 | inode->i_ctime = attr->ia_ctime; |
| 1648 | if (only) { |
| 1649 | /* |
| 1650 | * if kernel wants to dirty ctime but nothing else, |
| 1651 | * we need to choose a cap to dirty under, or do |
| 1652 | * a almost-no-op setattr |
| 1653 | */ |
| 1654 | if (issued & CEPH_CAP_AUTH_EXCL) |
| 1655 | dirtied |= CEPH_CAP_AUTH_EXCL; |
| 1656 | else if (issued & CEPH_CAP_FILE_EXCL) |
| 1657 | dirtied |= CEPH_CAP_FILE_EXCL; |
| 1658 | else if (issued & CEPH_CAP_XATTR_EXCL) |
| 1659 | dirtied |= CEPH_CAP_XATTR_EXCL; |
| 1660 | else |
| 1661 | mask |= CEPH_SETATTR_CTIME; |
| 1662 | } |
| 1663 | } |
| 1664 | if (ia_valid & ATTR_FILE) |
| 1665 | dout("setattr %p ATTR_FILE ... hrm!\n", inode); |
| 1666 | |
| 1667 | if (dirtied) { |
| 1668 | __ceph_mark_dirty_caps(ci, dirtied); |
| 1669 | inode->i_ctime = CURRENT_TIME; |
| 1670 | } |
| 1671 | |
| 1672 | release &= issued; |
| 1673 | spin_unlock(&inode->i_lock); |
| 1674 | |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1675 | if (mask) { |
| 1676 | req->r_inode = igrab(inode); |
| 1677 | req->r_inode_drop = release; |
| 1678 | req->r_args.setattr.mask = cpu_to_le32(mask); |
| 1679 | req->r_num_caps = 1; |
| 1680 | err = ceph_mdsc_do_request(mdsc, parent_inode, req); |
| 1681 | } |
| 1682 | dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err, |
| 1683 | ceph_cap_string(dirtied), mask); |
| 1684 | |
| 1685 | ceph_mdsc_put_request(req); |
| 1686 | __ceph_do_pending_vmtruncate(inode); |
| 1687 | return err; |
| 1688 | out: |
| 1689 | spin_unlock(&inode->i_lock); |
| 1690 | ceph_mdsc_put_request(req); |
| 1691 | return err; |
| 1692 | } |
| 1693 | |
| 1694 | /* |
| 1695 | * Verify that we have a lease on the given mask. If not, |
| 1696 | * do a getattr against an mds. |
| 1697 | */ |
| 1698 | int ceph_do_getattr(struct inode *inode, int mask) |
| 1699 | { |
| 1700 | struct ceph_client *client = ceph_sb_to_client(inode->i_sb); |
| 1701 | struct ceph_mds_client *mdsc = &client->mdsc; |
| 1702 | struct ceph_mds_request *req; |
| 1703 | int err; |
| 1704 | |
| 1705 | if (ceph_snap(inode) == CEPH_SNAPDIR) { |
| 1706 | dout("do_getattr inode %p SNAPDIR\n", inode); |
| 1707 | return 0; |
| 1708 | } |
| 1709 | |
| 1710 | dout("do_getattr inode %p mask %s\n", inode, ceph_cap_string(mask)); |
| 1711 | if (ceph_caps_issued_mask(ceph_inode(inode), mask, 1)) |
| 1712 | return 0; |
| 1713 | |
| 1714 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); |
| 1715 | if (IS_ERR(req)) |
| 1716 | return PTR_ERR(req); |
| 1717 | req->r_inode = igrab(inode); |
| 1718 | req->r_num_caps = 1; |
| 1719 | req->r_args.getattr.mask = cpu_to_le32(mask); |
| 1720 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
| 1721 | ceph_mdsc_put_request(req); |
| 1722 | dout("do_getattr result=%d\n", err); |
| 1723 | return err; |
| 1724 | } |
| 1725 | |
| 1726 | |
| 1727 | /* |
| 1728 | * Check inode permissions. We verify we have a valid value for |
| 1729 | * the AUTH cap, then call the generic handler. |
| 1730 | */ |
| 1731 | int ceph_permission(struct inode *inode, int mask) |
| 1732 | { |
| 1733 | int err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED); |
| 1734 | |
| 1735 | if (!err) |
| 1736 | err = generic_permission(inode, mask, NULL); |
| 1737 | return err; |
| 1738 | } |
| 1739 | |
| 1740 | /* |
| 1741 | * Get all attributes. Hopefully somedata we'll have a statlite() |
| 1742 | * and can limit the fields we require to be accurate. |
| 1743 | */ |
| 1744 | int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry, |
| 1745 | struct kstat *stat) |
| 1746 | { |
| 1747 | struct inode *inode = dentry->d_inode; |
Sage Weil | 232d4b0 | 2009-10-21 11:21:49 -0700 | [diff] [blame] | 1748 | struct ceph_inode_info *ci = ceph_inode(inode); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1749 | int err; |
| 1750 | |
| 1751 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL); |
| 1752 | if (!err) { |
| 1753 | generic_fillattr(inode, stat); |
| 1754 | stat->ino = inode->i_ino; |
| 1755 | if (ceph_snap(inode) != CEPH_NOSNAP) |
| 1756 | stat->dev = ceph_snap(inode); |
| 1757 | else |
| 1758 | stat->dev = 0; |
Sage Weil | 232d4b0 | 2009-10-21 11:21:49 -0700 | [diff] [blame] | 1759 | if (S_ISDIR(inode->i_mode)) { |
| 1760 | stat->size = ci->i_rbytes; |
| 1761 | stat->blocks = 0; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1762 | stat->blksize = 65536; |
Sage Weil | 232d4b0 | 2009-10-21 11:21:49 -0700 | [diff] [blame] | 1763 | } |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1764 | } |
| 1765 | return err; |
| 1766 | } |