Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1 | #include <linux/ceph/ceph_debug.h> |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 2 | |
| 3 | #include <linux/module.h> |
| 4 | #include <linux/fs.h> |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 5 | #include <linux/slab.h> |
| 6 | #include <linux/string.h> |
| 7 | #include <linux/uaccess.h> |
| 8 | #include <linux/kernel.h> |
| 9 | #include <linux/namei.h> |
| 10 | #include <linux/writeback.h> |
| 11 | #include <linux/vmalloc.h> |
| 12 | |
| 13 | #include "super.h" |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 14 | #include "mds_client.h" |
| 15 | #include <linux/ceph/decode.h> |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 16 | |
| 17 | /* |
| 18 | * Ceph inode operations |
| 19 | * |
| 20 | * Implement basic inode helpers (get, alloc) and inode ops (getattr, |
| 21 | * setattr, etc.), xattr helpers, and helpers for assimilating |
| 22 | * metadata returned by the MDS into our cache. |
| 23 | * |
| 24 | * Also define helpers for doing asynchronous writeback, invalidation, |
| 25 | * and truncation for the benefit of those who can't afford to block |
| 26 | * (typically because they are in the message handler path). |
| 27 | */ |
| 28 | |
| 29 | static const struct inode_operations ceph_symlink_iops; |
| 30 | |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 31 | static void ceph_invalidate_work(struct work_struct *work); |
| 32 | static void ceph_writeback_work(struct work_struct *work); |
| 33 | static void ceph_vmtruncate_work(struct work_struct *work); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 34 | |
| 35 | /* |
| 36 | * find or create an inode, given the ceph ino number |
| 37 | */ |
Yehuda Sadeh | ad1fee9 | 2011-01-21 16:44:03 -0800 | [diff] [blame] | 38 | static int ceph_set_ino_cb(struct inode *inode, void *data) |
| 39 | { |
| 40 | ceph_inode(inode)->i_vino = *(struct ceph_vino *)data; |
| 41 | inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data); |
| 42 | return 0; |
| 43 | } |
| 44 | |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 45 | struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino) |
| 46 | { |
| 47 | struct inode *inode; |
| 48 | ino_t t = ceph_vino_to_ino(vino); |
| 49 | |
| 50 | inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino); |
| 51 | if (inode == NULL) |
| 52 | return ERR_PTR(-ENOMEM); |
| 53 | if (inode->i_state & I_NEW) { |
| 54 | dout("get_inode created new inode %p %llx.%llx ino %llx\n", |
| 55 | inode, ceph_vinop(inode), (u64)inode->i_ino); |
| 56 | unlock_new_inode(inode); |
| 57 | } |
| 58 | |
| 59 | dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino, |
| 60 | vino.snap, inode); |
| 61 | return inode; |
| 62 | } |
| 63 | |
| 64 | /* |
| 65 | * get/constuct snapdir inode for a given directory |
| 66 | */ |
| 67 | struct inode *ceph_get_snapdir(struct inode *parent) |
| 68 | { |
| 69 | struct ceph_vino vino = { |
| 70 | .ino = ceph_ino(parent), |
| 71 | .snap = CEPH_SNAPDIR, |
| 72 | }; |
| 73 | struct inode *inode = ceph_get_inode(parent->i_sb, vino); |
Sage Weil | b377ff1 | 2009-11-11 15:22:37 -0800 | [diff] [blame] | 74 | struct ceph_inode_info *ci = ceph_inode(inode); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 75 | |
| 76 | BUG_ON(!S_ISDIR(parent->i_mode)); |
| 77 | if (IS_ERR(inode)) |
Julia Lawall | 7e34bc5 | 2010-05-22 12:01:14 +0200 | [diff] [blame] | 78 | return inode; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 79 | inode->i_mode = parent->i_mode; |
| 80 | inode->i_uid = parent->i_uid; |
| 81 | inode->i_gid = parent->i_gid; |
| 82 | inode->i_op = &ceph_dir_iops; |
| 83 | inode->i_fop = &ceph_dir_fops; |
Sage Weil | b377ff1 | 2009-11-11 15:22:37 -0800 | [diff] [blame] | 84 | ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */ |
| 85 | ci->i_rbytes = 0; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 86 | return inode; |
| 87 | } |
| 88 | |
| 89 | const struct inode_operations ceph_file_iops = { |
| 90 | .permission = ceph_permission, |
| 91 | .setattr = ceph_setattr, |
| 92 | .getattr = ceph_getattr, |
| 93 | .setxattr = ceph_setxattr, |
| 94 | .getxattr = ceph_getxattr, |
| 95 | .listxattr = ceph_listxattr, |
| 96 | .removexattr = ceph_removexattr, |
| 97 | }; |
| 98 | |
| 99 | |
| 100 | /* |
| 101 | * We use a 'frag tree' to keep track of the MDS's directory fragments |
| 102 | * for a given inode (usually there is just a single fragment). We |
| 103 | * need to know when a child frag is delegated to a new MDS, or when |
| 104 | * it is flagged as replicated, so we can direct our requests |
| 105 | * accordingly. |
| 106 | */ |
| 107 | |
| 108 | /* |
| 109 | * find/create a frag in the tree |
| 110 | */ |
| 111 | static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci, |
| 112 | u32 f) |
| 113 | { |
| 114 | struct rb_node **p; |
| 115 | struct rb_node *parent = NULL; |
| 116 | struct ceph_inode_frag *frag; |
| 117 | int c; |
| 118 | |
| 119 | p = &ci->i_fragtree.rb_node; |
| 120 | while (*p) { |
| 121 | parent = *p; |
| 122 | frag = rb_entry(parent, struct ceph_inode_frag, node); |
| 123 | c = ceph_frag_compare(f, frag->frag); |
| 124 | if (c < 0) |
| 125 | p = &(*p)->rb_left; |
| 126 | else if (c > 0) |
| 127 | p = &(*p)->rb_right; |
| 128 | else |
| 129 | return frag; |
| 130 | } |
| 131 | |
| 132 | frag = kmalloc(sizeof(*frag), GFP_NOFS); |
| 133 | if (!frag) { |
| 134 | pr_err("__get_or_create_frag ENOMEM on %p %llx.%llx " |
| 135 | "frag %x\n", &ci->vfs_inode, |
| 136 | ceph_vinop(&ci->vfs_inode), f); |
| 137 | return ERR_PTR(-ENOMEM); |
| 138 | } |
| 139 | frag->frag = f; |
| 140 | frag->split_by = 0; |
| 141 | frag->mds = -1; |
| 142 | frag->ndist = 0; |
| 143 | |
| 144 | rb_link_node(&frag->node, parent, p); |
| 145 | rb_insert_color(&frag->node, &ci->i_fragtree); |
| 146 | |
| 147 | dout("get_or_create_frag added %llx.%llx frag %x\n", |
| 148 | ceph_vinop(&ci->vfs_inode), f); |
| 149 | return frag; |
| 150 | } |
| 151 | |
| 152 | /* |
| 153 | * find a specific frag @f |
| 154 | */ |
| 155 | struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f) |
| 156 | { |
| 157 | struct rb_node *n = ci->i_fragtree.rb_node; |
| 158 | |
| 159 | while (n) { |
| 160 | struct ceph_inode_frag *frag = |
| 161 | rb_entry(n, struct ceph_inode_frag, node); |
| 162 | int c = ceph_frag_compare(f, frag->frag); |
| 163 | if (c < 0) |
| 164 | n = n->rb_left; |
| 165 | else if (c > 0) |
| 166 | n = n->rb_right; |
| 167 | else |
| 168 | return frag; |
| 169 | } |
| 170 | return NULL; |
| 171 | } |
| 172 | |
| 173 | /* |
| 174 | * Choose frag containing the given value @v. If @pfrag is |
| 175 | * specified, copy the frag delegation info to the caller if |
| 176 | * it is present. |
| 177 | */ |
| 178 | u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, |
| 179 | struct ceph_inode_frag *pfrag, |
| 180 | int *found) |
| 181 | { |
| 182 | u32 t = ceph_frag_make(0, 0); |
| 183 | struct ceph_inode_frag *frag; |
| 184 | unsigned nway, i; |
| 185 | u32 n; |
| 186 | |
| 187 | if (found) |
| 188 | *found = 0; |
| 189 | |
| 190 | mutex_lock(&ci->i_fragtree_mutex); |
| 191 | while (1) { |
| 192 | WARN_ON(!ceph_frag_contains_value(t, v)); |
| 193 | frag = __ceph_find_frag(ci, t); |
| 194 | if (!frag) |
| 195 | break; /* t is a leaf */ |
| 196 | if (frag->split_by == 0) { |
| 197 | if (pfrag) |
| 198 | memcpy(pfrag, frag, sizeof(*pfrag)); |
| 199 | if (found) |
| 200 | *found = 1; |
| 201 | break; |
| 202 | } |
| 203 | |
| 204 | /* choose child */ |
| 205 | nway = 1 << frag->split_by; |
| 206 | dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t, |
| 207 | frag->split_by, nway); |
| 208 | for (i = 0; i < nway; i++) { |
| 209 | n = ceph_frag_make_child(t, frag->split_by, i); |
| 210 | if (ceph_frag_contains_value(n, v)) { |
| 211 | t = n; |
| 212 | break; |
| 213 | } |
| 214 | } |
| 215 | BUG_ON(i == nway); |
| 216 | } |
| 217 | dout("choose_frag(%x) = %x\n", v, t); |
| 218 | |
| 219 | mutex_unlock(&ci->i_fragtree_mutex); |
| 220 | return t; |
| 221 | } |
| 222 | |
| 223 | /* |
| 224 | * Process dirfrag (delegation) info from the mds. Include leaf |
| 225 | * fragment in tree ONLY if ndist > 0. Otherwise, only |
| 226 | * branches/splits are included in i_fragtree) |
| 227 | */ |
| 228 | static int ceph_fill_dirfrag(struct inode *inode, |
| 229 | struct ceph_mds_reply_dirfrag *dirinfo) |
| 230 | { |
| 231 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 232 | struct ceph_inode_frag *frag; |
| 233 | u32 id = le32_to_cpu(dirinfo->frag); |
| 234 | int mds = le32_to_cpu(dirinfo->auth); |
| 235 | int ndist = le32_to_cpu(dirinfo->ndist); |
| 236 | int i; |
| 237 | int err = 0; |
| 238 | |
| 239 | mutex_lock(&ci->i_fragtree_mutex); |
| 240 | if (ndist == 0) { |
| 241 | /* no delegation info needed. */ |
| 242 | frag = __ceph_find_frag(ci, id); |
| 243 | if (!frag) |
| 244 | goto out; |
| 245 | if (frag->split_by == 0) { |
| 246 | /* tree leaf, remove */ |
| 247 | dout("fill_dirfrag removed %llx.%llx frag %x" |
| 248 | " (no ref)\n", ceph_vinop(inode), id); |
| 249 | rb_erase(&frag->node, &ci->i_fragtree); |
| 250 | kfree(frag); |
| 251 | } else { |
| 252 | /* tree branch, keep and clear */ |
| 253 | dout("fill_dirfrag cleared %llx.%llx frag %x" |
| 254 | " referral\n", ceph_vinop(inode), id); |
| 255 | frag->mds = -1; |
| 256 | frag->ndist = 0; |
| 257 | } |
| 258 | goto out; |
| 259 | } |
| 260 | |
| 261 | |
| 262 | /* find/add this frag to store mds delegation info */ |
| 263 | frag = __get_or_create_frag(ci, id); |
| 264 | if (IS_ERR(frag)) { |
| 265 | /* this is not the end of the world; we can continue |
| 266 | with bad/inaccurate delegation info */ |
| 267 | pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n", |
| 268 | ceph_vinop(inode), le32_to_cpu(dirinfo->frag)); |
| 269 | err = -ENOMEM; |
| 270 | goto out; |
| 271 | } |
| 272 | |
| 273 | frag->mds = mds; |
| 274 | frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP); |
| 275 | for (i = 0; i < frag->ndist; i++) |
| 276 | frag->dist[i] = le32_to_cpu(dirinfo->dist[i]); |
| 277 | dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n", |
| 278 | ceph_vinop(inode), frag->frag, frag->ndist); |
| 279 | |
| 280 | out: |
| 281 | mutex_unlock(&ci->i_fragtree_mutex); |
| 282 | return err; |
| 283 | } |
| 284 | |
| 285 | |
| 286 | /* |
| 287 | * initialize a newly allocated inode. |
| 288 | */ |
| 289 | struct inode *ceph_alloc_inode(struct super_block *sb) |
| 290 | { |
| 291 | struct ceph_inode_info *ci; |
| 292 | int i; |
| 293 | |
| 294 | ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS); |
| 295 | if (!ci) |
| 296 | return NULL; |
| 297 | |
| 298 | dout("alloc_inode %p\n", &ci->vfs_inode); |
| 299 | |
| 300 | ci->i_version = 0; |
| 301 | ci->i_time_warp_seq = 0; |
| 302 | ci->i_ceph_flags = 0; |
| 303 | ci->i_release_count = 0; |
| 304 | ci->i_symlink = NULL; |
| 305 | |
Sage Weil | 6c0f3af | 2010-11-16 11:14:34 -0800 | [diff] [blame] | 306 | memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout)); |
| 307 | |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 308 | ci->i_fragtree = RB_ROOT; |
| 309 | mutex_init(&ci->i_fragtree_mutex); |
| 310 | |
| 311 | ci->i_xattrs.blob = NULL; |
| 312 | ci->i_xattrs.prealloc_blob = NULL; |
| 313 | ci->i_xattrs.dirty = false; |
| 314 | ci->i_xattrs.index = RB_ROOT; |
| 315 | ci->i_xattrs.count = 0; |
| 316 | ci->i_xattrs.names_size = 0; |
| 317 | ci->i_xattrs.vals_size = 0; |
| 318 | ci->i_xattrs.version = 0; |
| 319 | ci->i_xattrs.index_version = 0; |
| 320 | |
| 321 | ci->i_caps = RB_ROOT; |
| 322 | ci->i_auth_cap = NULL; |
| 323 | ci->i_dirty_caps = 0; |
| 324 | ci->i_flushing_caps = 0; |
| 325 | INIT_LIST_HEAD(&ci->i_dirty_item); |
| 326 | INIT_LIST_HEAD(&ci->i_flushing_item); |
| 327 | ci->i_cap_flush_seq = 0; |
| 328 | ci->i_cap_flush_last_tid = 0; |
| 329 | memset(&ci->i_cap_flush_tid, 0, sizeof(ci->i_cap_flush_tid)); |
| 330 | init_waitqueue_head(&ci->i_cap_wq); |
| 331 | ci->i_hold_caps_min = 0; |
| 332 | ci->i_hold_caps_max = 0; |
| 333 | INIT_LIST_HEAD(&ci->i_cap_delay_list); |
| 334 | ci->i_cap_exporting_mds = 0; |
| 335 | ci->i_cap_exporting_mseq = 0; |
| 336 | ci->i_cap_exporting_issued = 0; |
| 337 | INIT_LIST_HEAD(&ci->i_cap_snaps); |
| 338 | ci->i_head_snapc = NULL; |
| 339 | ci->i_snap_caps = 0; |
| 340 | |
| 341 | for (i = 0; i < CEPH_FILE_MODE_NUM; i++) |
| 342 | ci->i_nr_by_mode[i] = 0; |
| 343 | |
| 344 | ci->i_truncate_seq = 0; |
| 345 | ci->i_truncate_size = 0; |
| 346 | ci->i_truncate_pending = 0; |
| 347 | |
| 348 | ci->i_max_size = 0; |
| 349 | ci->i_reported_size = 0; |
| 350 | ci->i_wanted_max_size = 0; |
| 351 | ci->i_requested_max_size = 0; |
| 352 | |
| 353 | ci->i_pin_ref = 0; |
| 354 | ci->i_rd_ref = 0; |
| 355 | ci->i_rdcache_ref = 0; |
| 356 | ci->i_wr_ref = 0; |
Henry C Chang | d3d0720 | 2011-05-11 10:29:54 +0000 | [diff] [blame] | 357 | ci->i_wb_ref = 0; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 358 | ci->i_wrbuffer_ref = 0; |
| 359 | ci->i_wrbuffer_ref_head = 0; |
| 360 | ci->i_shared_gen = 0; |
| 361 | ci->i_rdcache_gen = 0; |
| 362 | ci->i_rdcache_revoking = 0; |
| 363 | |
| 364 | INIT_LIST_HEAD(&ci->i_unsafe_writes); |
| 365 | INIT_LIST_HEAD(&ci->i_unsafe_dirops); |
| 366 | spin_lock_init(&ci->i_unsafe_lock); |
| 367 | |
| 368 | ci->i_snap_realm = NULL; |
| 369 | INIT_LIST_HEAD(&ci->i_snap_realm_item); |
| 370 | INIT_LIST_HEAD(&ci->i_snap_flush_item); |
| 371 | |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 372 | INIT_WORK(&ci->i_wb_work, ceph_writeback_work); |
| 373 | INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 374 | |
| 375 | INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work); |
| 376 | |
| 377 | return &ci->vfs_inode; |
| 378 | } |
| 379 | |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 380 | static void ceph_i_callback(struct rcu_head *head) |
| 381 | { |
| 382 | struct inode *inode = container_of(head, struct inode, i_rcu); |
| 383 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 384 | |
| 385 | INIT_LIST_HEAD(&inode->i_dentry); |
| 386 | kmem_cache_free(ceph_inode_cachep, ci); |
| 387 | } |
| 388 | |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 389 | void ceph_destroy_inode(struct inode *inode) |
| 390 | { |
| 391 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 392 | struct ceph_inode_frag *frag; |
| 393 | struct rb_node *n; |
| 394 | |
| 395 | dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode)); |
| 396 | |
| 397 | ceph_queue_caps_release(inode); |
| 398 | |
Sage Weil | 8b218b8 | 2010-03-09 12:59:08 -0800 | [diff] [blame] | 399 | /* |
| 400 | * we may still have a snap_realm reference if there are stray |
| 401 | * caps in i_cap_exporting_issued or i_snap_caps. |
| 402 | */ |
| 403 | if (ci->i_snap_realm) { |
| 404 | struct ceph_mds_client *mdsc = |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 405 | ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc; |
Sage Weil | 8b218b8 | 2010-03-09 12:59:08 -0800 | [diff] [blame] | 406 | struct ceph_snap_realm *realm = ci->i_snap_realm; |
| 407 | |
| 408 | dout(" dropping residual ref to snap realm %p\n", realm); |
| 409 | spin_lock(&realm->inodes_with_caps_lock); |
| 410 | list_del_init(&ci->i_snap_realm_item); |
| 411 | spin_unlock(&realm->inodes_with_caps_lock); |
| 412 | ceph_put_snap_realm(mdsc, realm); |
| 413 | } |
| 414 | |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 415 | kfree(ci->i_symlink); |
| 416 | while ((n = rb_first(&ci->i_fragtree)) != NULL) { |
| 417 | frag = rb_entry(n, struct ceph_inode_frag, node); |
| 418 | rb_erase(n, &ci->i_fragtree); |
| 419 | kfree(frag); |
| 420 | } |
| 421 | |
| 422 | __ceph_destroy_xattrs(ci); |
Sage Weil | b6c1d5b | 2009-12-07 12:17:17 -0800 | [diff] [blame] | 423 | if (ci->i_xattrs.blob) |
| 424 | ceph_buffer_put(ci->i_xattrs.blob); |
| 425 | if (ci->i_xattrs.prealloc_blob) |
| 426 | ceph_buffer_put(ci->i_xattrs.prealloc_blob); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 427 | |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 428 | call_rcu(&inode->i_rcu, ceph_i_callback); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 429 | } |
| 430 | |
| 431 | |
| 432 | /* |
| 433 | * Helpers to fill in size, ctime, mtime, and atime. We have to be |
| 434 | * careful because either the client or MDS may have more up to date |
| 435 | * info, depending on which capabilities are held, and whether |
| 436 | * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime |
| 437 | * and size are monotonically increasing, except when utimes() or |
| 438 | * truncate() increments the corresponding _seq values.) |
| 439 | */ |
| 440 | int ceph_fill_file_size(struct inode *inode, int issued, |
| 441 | u32 truncate_seq, u64 truncate_size, u64 size) |
| 442 | { |
| 443 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 444 | int queue_trunc = 0; |
| 445 | |
| 446 | if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 || |
| 447 | (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) { |
| 448 | dout("size %lld -> %llu\n", inode->i_size, size); |
| 449 | inode->i_size = size; |
| 450 | inode->i_blocks = (size + (1<<9) - 1) >> 9; |
| 451 | ci->i_reported_size = size; |
| 452 | if (truncate_seq != ci->i_truncate_seq) { |
| 453 | dout("truncate_seq %u -> %u\n", |
| 454 | ci->i_truncate_seq, truncate_seq); |
| 455 | ci->i_truncate_seq = truncate_seq; |
Yehuda Sadeh | 3d497d8 | 2010-02-09 11:08:40 -0800 | [diff] [blame] | 456 | /* |
| 457 | * If we hold relevant caps, or in the case where we're |
| 458 | * not the only client referencing this file and we |
| 459 | * don't hold those caps, then we need to check whether |
| 460 | * the file is either opened or mmaped |
| 461 | */ |
| 462 | if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_RD| |
Sage Weil | 2962507 | 2010-05-27 10:40:43 -0700 | [diff] [blame] | 463 | CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER| |
| 464 | CEPH_CAP_FILE_EXCL| |
| 465 | CEPH_CAP_FILE_LAZYIO)) || |
Yehuda Sadeh | 3d497d8 | 2010-02-09 11:08:40 -0800 | [diff] [blame] | 466 | mapping_mapped(inode->i_mapping) || |
| 467 | __ceph_caps_file_wanted(ci)) { |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 468 | ci->i_truncate_pending++; |
| 469 | queue_trunc = 1; |
| 470 | } |
| 471 | } |
| 472 | } |
| 473 | if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 && |
| 474 | ci->i_truncate_size != truncate_size) { |
| 475 | dout("truncate_size %lld -> %llu\n", ci->i_truncate_size, |
| 476 | truncate_size); |
| 477 | ci->i_truncate_size = truncate_size; |
| 478 | } |
| 479 | return queue_trunc; |
| 480 | } |
| 481 | |
| 482 | void ceph_fill_file_time(struct inode *inode, int issued, |
| 483 | u64 time_warp_seq, struct timespec *ctime, |
| 484 | struct timespec *mtime, struct timespec *atime) |
| 485 | { |
| 486 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 487 | int warn = 0; |
| 488 | |
| 489 | if (issued & (CEPH_CAP_FILE_EXCL| |
| 490 | CEPH_CAP_FILE_WR| |
Sage Weil | d8672d6 | 2010-11-08 09:24:34 -0800 | [diff] [blame] | 491 | CEPH_CAP_FILE_BUFFER| |
| 492 | CEPH_CAP_AUTH_EXCL| |
| 493 | CEPH_CAP_XATTR_EXCL)) { |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 494 | if (timespec_compare(ctime, &inode->i_ctime) > 0) { |
| 495 | dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n", |
| 496 | inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, |
| 497 | ctime->tv_sec, ctime->tv_nsec); |
| 498 | inode->i_ctime = *ctime; |
| 499 | } |
| 500 | if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) { |
| 501 | /* the MDS did a utimes() */ |
| 502 | dout("mtime %ld.%09ld -> %ld.%09ld " |
| 503 | "tw %d -> %d\n", |
| 504 | inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, |
| 505 | mtime->tv_sec, mtime->tv_nsec, |
| 506 | ci->i_time_warp_seq, (int)time_warp_seq); |
| 507 | |
| 508 | inode->i_mtime = *mtime; |
| 509 | inode->i_atime = *atime; |
| 510 | ci->i_time_warp_seq = time_warp_seq; |
| 511 | } else if (time_warp_seq == ci->i_time_warp_seq) { |
| 512 | /* nobody did utimes(); take the max */ |
| 513 | if (timespec_compare(mtime, &inode->i_mtime) > 0) { |
| 514 | dout("mtime %ld.%09ld -> %ld.%09ld inc\n", |
| 515 | inode->i_mtime.tv_sec, |
| 516 | inode->i_mtime.tv_nsec, |
| 517 | mtime->tv_sec, mtime->tv_nsec); |
| 518 | inode->i_mtime = *mtime; |
| 519 | } |
| 520 | if (timespec_compare(atime, &inode->i_atime) > 0) { |
| 521 | dout("atime %ld.%09ld -> %ld.%09ld inc\n", |
| 522 | inode->i_atime.tv_sec, |
| 523 | inode->i_atime.tv_nsec, |
| 524 | atime->tv_sec, atime->tv_nsec); |
| 525 | inode->i_atime = *atime; |
| 526 | } |
| 527 | } else if (issued & CEPH_CAP_FILE_EXCL) { |
| 528 | /* we did a utimes(); ignore mds values */ |
| 529 | } else { |
| 530 | warn = 1; |
| 531 | } |
| 532 | } else { |
Sage Weil | d8672d6 | 2010-11-08 09:24:34 -0800 | [diff] [blame] | 533 | /* we have no write|excl caps; whatever the MDS says is true */ |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 534 | if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) { |
| 535 | inode->i_ctime = *ctime; |
| 536 | inode->i_mtime = *mtime; |
| 537 | inode->i_atime = *atime; |
| 538 | ci->i_time_warp_seq = time_warp_seq; |
| 539 | } else { |
| 540 | warn = 1; |
| 541 | } |
| 542 | } |
| 543 | if (warn) /* time_warp_seq shouldn't go backwards */ |
| 544 | dout("%p mds time_warp_seq %llu < %u\n", |
| 545 | inode, time_warp_seq, ci->i_time_warp_seq); |
| 546 | } |
| 547 | |
| 548 | /* |
| 549 | * Populate an inode based on info from mds. May be called on new or |
| 550 | * existing inodes. |
| 551 | */ |
| 552 | static int fill_inode(struct inode *inode, |
| 553 | struct ceph_mds_reply_info_in *iinfo, |
| 554 | struct ceph_mds_reply_dirfrag *dirinfo, |
| 555 | struct ceph_mds_session *session, |
| 556 | unsigned long ttl_from, int cap_fmode, |
| 557 | struct ceph_cap_reservation *caps_reservation) |
| 558 | { |
| 559 | struct ceph_mds_reply_inode *info = iinfo->in; |
| 560 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 561 | int i; |
Sage Weil | dfabbed6 | 2011-07-26 11:30:02 -0700 | [diff] [blame] | 562 | int issued = 0, implemented; |
| 563 | int updating_inode = 0; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 564 | struct timespec mtime, atime, ctime; |
| 565 | u32 nsplits; |
| 566 | struct ceph_buffer *xattr_blob = NULL; |
| 567 | int err = 0; |
| 568 | int queue_trunc = 0; |
| 569 | |
| 570 | dout("fill_inode %p ino %llx.%llx v %llu had %llu\n", |
| 571 | inode, ceph_vinop(inode), le64_to_cpu(info->version), |
| 572 | ci->i_version); |
| 573 | |
| 574 | /* |
| 575 | * prealloc xattr data, if it looks like we'll need it. only |
| 576 | * if len > 4 (meaning there are actually xattrs; the first 4 |
| 577 | * bytes are the xattr count). |
| 578 | */ |
| 579 | if (iinfo->xattr_len > 4) { |
Sage Weil | b6c1d5b | 2009-12-07 12:17:17 -0800 | [diff] [blame] | 580 | xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 581 | if (!xattr_blob) |
| 582 | pr_err("fill_inode ENOMEM xattr blob %d bytes\n", |
| 583 | iinfo->xattr_len); |
| 584 | } |
| 585 | |
| 586 | spin_lock(&inode->i_lock); |
| 587 | |
| 588 | /* |
| 589 | * provided version will be odd if inode value is projected, |
Sage Weil | 8bd59e0 | 2010-11-08 09:23:12 -0800 | [diff] [blame] | 590 | * even if stable. skip the update if we have newer stable |
| 591 | * info (ours>=theirs, e.g. due to racing mds replies), unless |
| 592 | * we are getting projected (unstable) info (in which case the |
| 593 | * version is odd, and we want ours>theirs). |
| 594 | * us them |
| 595 | * 2 2 skip |
| 596 | * 3 2 skip |
| 597 | * 3 3 update |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 598 | */ |
| 599 | if (le64_to_cpu(info->version) > 0 && |
Sage Weil | 8bd59e0 | 2010-11-08 09:23:12 -0800 | [diff] [blame] | 600 | (ci->i_version & ~1) >= le64_to_cpu(info->version)) |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 601 | goto no_change; |
Sage Weil | dfabbed6 | 2011-07-26 11:30:02 -0700 | [diff] [blame] | 602 | |
| 603 | updating_inode = 1; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 604 | issued = __ceph_caps_issued(ci, &implemented); |
| 605 | issued |= implemented | __ceph_caps_dirty(ci); |
| 606 | |
| 607 | /* update inode */ |
| 608 | ci->i_version = le64_to_cpu(info->version); |
| 609 | inode->i_version++; |
| 610 | inode->i_rdev = le32_to_cpu(info->rdev); |
| 611 | |
| 612 | if ((issued & CEPH_CAP_AUTH_EXCL) == 0) { |
| 613 | inode->i_mode = le32_to_cpu(info->mode); |
| 614 | inode->i_uid = le32_to_cpu(info->uid); |
| 615 | inode->i_gid = le32_to_cpu(info->gid); |
| 616 | dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode, |
| 617 | inode->i_uid, inode->i_gid); |
| 618 | } |
| 619 | |
| 620 | if ((issued & CEPH_CAP_LINK_EXCL) == 0) |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 621 | set_nlink(inode, le32_to_cpu(info->nlink)); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 622 | |
| 623 | /* be careful with mtime, atime, size */ |
| 624 | ceph_decode_timespec(&atime, &info->atime); |
| 625 | ceph_decode_timespec(&mtime, &info->mtime); |
| 626 | ceph_decode_timespec(&ctime, &info->ctime); |
| 627 | queue_trunc = ceph_fill_file_size(inode, issued, |
| 628 | le32_to_cpu(info->truncate_seq), |
| 629 | le64_to_cpu(info->truncate_size), |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 630 | le64_to_cpu(info->size)); |
| 631 | ceph_fill_file_time(inode, issued, |
| 632 | le32_to_cpu(info->time_warp_seq), |
| 633 | &ctime, &mtime, &atime); |
| 634 | |
Sage Weil | 912a9b0 | 2010-11-07 09:37:25 -0800 | [diff] [blame] | 635 | /* only update max_size on auth cap */ |
| 636 | if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && |
| 637 | ci->i_max_size != le64_to_cpu(info->max_size)) { |
| 638 | dout("max_size %lld -> %llu\n", ci->i_max_size, |
| 639 | le64_to_cpu(info->max_size)); |
| 640 | ci->i_max_size = le64_to_cpu(info->max_size); |
| 641 | } |
| 642 | |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 643 | ci->i_layout = info->layout; |
| 644 | inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; |
| 645 | |
| 646 | /* xattrs */ |
| 647 | /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */ |
| 648 | if ((issued & CEPH_CAP_XATTR_EXCL) == 0 && |
| 649 | le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) { |
| 650 | if (ci->i_xattrs.blob) |
| 651 | ceph_buffer_put(ci->i_xattrs.blob); |
| 652 | ci->i_xattrs.blob = xattr_blob; |
| 653 | if (xattr_blob) |
| 654 | memcpy(ci->i_xattrs.blob->vec.iov_base, |
| 655 | iinfo->xattr_data, iinfo->xattr_len); |
| 656 | ci->i_xattrs.version = le64_to_cpu(info->xattr_version); |
Sage Weil | a6424e4 | 2010-04-29 09:28:11 -0700 | [diff] [blame] | 657 | xattr_blob = NULL; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 658 | } |
| 659 | |
| 660 | inode->i_mapping->a_ops = &ceph_aops; |
| 661 | inode->i_mapping->backing_dev_info = |
Cheng Renquan | 640ef79 | 2010-03-26 17:40:33 +0800 | [diff] [blame] | 662 | &ceph_sb_to_client(inode->i_sb)->backing_dev_info; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 663 | |
| 664 | switch (inode->i_mode & S_IFMT) { |
| 665 | case S_IFIFO: |
| 666 | case S_IFBLK: |
| 667 | case S_IFCHR: |
| 668 | case S_IFSOCK: |
| 669 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
| 670 | inode->i_op = &ceph_file_iops; |
| 671 | break; |
| 672 | case S_IFREG: |
| 673 | inode->i_op = &ceph_file_iops; |
| 674 | inode->i_fop = &ceph_file_fops; |
| 675 | break; |
| 676 | case S_IFLNK: |
| 677 | inode->i_op = &ceph_symlink_iops; |
| 678 | if (!ci->i_symlink) { |
| 679 | int symlen = iinfo->symlink_len; |
| 680 | char *sym; |
| 681 | |
| 682 | BUG_ON(symlen != inode->i_size); |
| 683 | spin_unlock(&inode->i_lock); |
| 684 | |
| 685 | err = -ENOMEM; |
| 686 | sym = kmalloc(symlen+1, GFP_NOFS); |
| 687 | if (!sym) |
| 688 | goto out; |
| 689 | memcpy(sym, iinfo->symlink, symlen); |
| 690 | sym[symlen] = 0; |
| 691 | |
| 692 | spin_lock(&inode->i_lock); |
| 693 | if (!ci->i_symlink) |
| 694 | ci->i_symlink = sym; |
| 695 | else |
| 696 | kfree(sym); /* lost a race */ |
| 697 | } |
| 698 | break; |
| 699 | case S_IFDIR: |
| 700 | inode->i_op = &ceph_dir_iops; |
| 701 | inode->i_fop = &ceph_dir_fops; |
| 702 | |
Sage Weil | 14303d2 | 2010-12-14 17:37:52 -0800 | [diff] [blame] | 703 | ci->i_dir_layout = iinfo->dir_layout; |
| 704 | |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 705 | ci->i_files = le64_to_cpu(info->files); |
| 706 | ci->i_subdirs = le64_to_cpu(info->subdirs); |
| 707 | ci->i_rbytes = le64_to_cpu(info->rbytes); |
| 708 | ci->i_rfiles = le64_to_cpu(info->rfiles); |
| 709 | ci->i_rsubdirs = le64_to_cpu(info->rsubdirs); |
| 710 | ceph_decode_timespec(&ci->i_rctime, &info->rctime); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 711 | break; |
| 712 | default: |
| 713 | pr_err("fill_inode %llx.%llx BAD mode 0%o\n", |
| 714 | ceph_vinop(inode), inode->i_mode); |
| 715 | } |
| 716 | |
| 717 | no_change: |
| 718 | spin_unlock(&inode->i_lock); |
| 719 | |
| 720 | /* queue truncate if we saw i_size decrease */ |
| 721 | if (queue_trunc) |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 722 | ceph_queue_vmtruncate(inode); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 723 | |
| 724 | /* populate frag tree */ |
| 725 | /* FIXME: move me up, if/when version reflects fragtree changes */ |
| 726 | nsplits = le32_to_cpu(info->fragtree.nsplits); |
| 727 | mutex_lock(&ci->i_fragtree_mutex); |
| 728 | for (i = 0; i < nsplits; i++) { |
| 729 | u32 id = le32_to_cpu(info->fragtree.splits[i].frag); |
| 730 | struct ceph_inode_frag *frag = __get_or_create_frag(ci, id); |
| 731 | |
| 732 | if (IS_ERR(frag)) |
| 733 | continue; |
| 734 | frag->split_by = le32_to_cpu(info->fragtree.splits[i].by); |
| 735 | dout(" frag %x split by %d\n", frag->frag, frag->split_by); |
| 736 | } |
| 737 | mutex_unlock(&ci->i_fragtree_mutex); |
| 738 | |
| 739 | /* were we issued a capability? */ |
| 740 | if (info->cap.caps) { |
| 741 | if (ceph_snap(inode) == CEPH_NOSNAP) { |
| 742 | ceph_add_cap(inode, session, |
| 743 | le64_to_cpu(info->cap.cap_id), |
| 744 | cap_fmode, |
| 745 | le32_to_cpu(info->cap.caps), |
| 746 | le32_to_cpu(info->cap.wanted), |
| 747 | le32_to_cpu(info->cap.seq), |
| 748 | le32_to_cpu(info->cap.mseq), |
| 749 | le64_to_cpu(info->cap.realm), |
| 750 | info->cap.flags, |
| 751 | caps_reservation); |
| 752 | } else { |
| 753 | spin_lock(&inode->i_lock); |
| 754 | dout(" %p got snap_caps %s\n", inode, |
| 755 | ceph_cap_string(le32_to_cpu(info->cap.caps))); |
| 756 | ci->i_snap_caps |= le32_to_cpu(info->cap.caps); |
| 757 | if (cap_fmode >= 0) |
| 758 | __ceph_get_fmode(ci, cap_fmode); |
| 759 | spin_unlock(&inode->i_lock); |
| 760 | } |
Sage Weil | 04d000e | 2010-05-07 11:26:34 -0700 | [diff] [blame] | 761 | } else if (cap_fmode >= 0) { |
| 762 | pr_warning("mds issued no caps on %llx.%llx\n", |
| 763 | ceph_vinop(inode)); |
| 764 | __ceph_get_fmode(ci, cap_fmode); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 765 | } |
| 766 | |
Sage Weil | dfabbed6 | 2011-07-26 11:30:02 -0700 | [diff] [blame] | 767 | /* set dir completion flag? */ |
| 768 | if (S_ISDIR(inode->i_mode) && |
| 769 | updating_inode && /* didn't jump to no_change */ |
| 770 | ci->i_files == 0 && ci->i_subdirs == 0 && |
| 771 | ceph_snap(inode) == CEPH_NOSNAP && |
| 772 | (le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED) && |
| 773 | (issued & CEPH_CAP_FILE_EXCL) == 0 && |
Sage Weil | c6ffe10 | 2011-11-03 09:23:36 -0700 | [diff] [blame] | 774 | !ceph_dir_test_complete(inode)) { |
Sage Weil | dfabbed6 | 2011-07-26 11:30:02 -0700 | [diff] [blame] | 775 | dout(" marking %p complete (empty)\n", inode); |
Sage Weil | c6ffe10 | 2011-11-03 09:23:36 -0700 | [diff] [blame] | 776 | ceph_dir_set_complete(inode); |
Sage Weil | dfabbed6 | 2011-07-26 11:30:02 -0700 | [diff] [blame] | 777 | ci->i_max_offset = 2; |
| 778 | } |
| 779 | |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 780 | /* update delegation info? */ |
| 781 | if (dirinfo) |
| 782 | ceph_fill_dirfrag(inode, dirinfo); |
| 783 | |
| 784 | err = 0; |
| 785 | |
| 786 | out: |
Sage Weil | b6c1d5b | 2009-12-07 12:17:17 -0800 | [diff] [blame] | 787 | if (xattr_blob) |
| 788 | ceph_buffer_put(xattr_blob); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 789 | return err; |
| 790 | } |
| 791 | |
| 792 | /* |
| 793 | * caller should hold session s_mutex. |
| 794 | */ |
| 795 | static void update_dentry_lease(struct dentry *dentry, |
| 796 | struct ceph_mds_reply_lease *lease, |
| 797 | struct ceph_mds_session *session, |
| 798 | unsigned long from_time) |
| 799 | { |
| 800 | struct ceph_dentry_info *di = ceph_dentry(dentry); |
| 801 | long unsigned duration = le32_to_cpu(lease->duration_ms); |
| 802 | long unsigned ttl = from_time + (duration * HZ) / 1000; |
| 803 | long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000; |
| 804 | struct inode *dir; |
| 805 | |
| 806 | /* only track leases on regular dentries */ |
| 807 | if (dentry->d_op != &ceph_dentry_ops) |
| 808 | return; |
| 809 | |
| 810 | spin_lock(&dentry->d_lock); |
Sage Weil | 2f90b85 | 2011-07-26 11:28:25 -0700 | [diff] [blame] | 811 | dout("update_dentry_lease %p duration %lu ms ttl %lu\n", |
| 812 | dentry, duration, ttl); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 813 | |
| 814 | /* make lease_rdcache_gen match directory */ |
| 815 | dir = dentry->d_parent->d_inode; |
| 816 | di->lease_shared_gen = ceph_inode(dir)->i_shared_gen; |
| 817 | |
Sage Weil | 2f90b85 | 2011-07-26 11:28:25 -0700 | [diff] [blame] | 818 | if (duration == 0) |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 819 | goto out_unlock; |
| 820 | |
| 821 | if (di->lease_gen == session->s_cap_gen && |
| 822 | time_before(ttl, dentry->d_time)) |
| 823 | goto out_unlock; /* we already have a newer lease. */ |
| 824 | |
| 825 | if (di->lease_session && di->lease_session != session) |
| 826 | goto out_unlock; |
| 827 | |
| 828 | ceph_dentry_lru_touch(dentry); |
| 829 | |
| 830 | if (!di->lease_session) |
| 831 | di->lease_session = ceph_get_mds_session(session); |
| 832 | di->lease_gen = session->s_cap_gen; |
| 833 | di->lease_seq = le32_to_cpu(lease->seq); |
| 834 | di->lease_renew_after = half_ttl; |
| 835 | di->lease_renew_from = 0; |
| 836 | dentry->d_time = ttl; |
| 837 | out_unlock: |
| 838 | spin_unlock(&dentry->d_lock); |
| 839 | return; |
| 840 | } |
| 841 | |
| 842 | /* |
Yehuda Sadeh | 4baa75e | 2010-01-07 15:36:32 -0800 | [diff] [blame] | 843 | * Set dentry's directory position based on the current dir's max, and |
| 844 | * order it in d_subdirs, so that dcache_readdir behaves. |
Sage Weil | 4f17726 | 2011-07-26 11:31:08 -0700 | [diff] [blame] | 845 | * |
| 846 | * Always called under directory's i_mutex. |
Yehuda Sadeh | 4baa75e | 2010-01-07 15:36:32 -0800 | [diff] [blame] | 847 | */ |
| 848 | static void ceph_set_dentry_offset(struct dentry *dn) |
| 849 | { |
| 850 | struct dentry *dir = dn->d_parent; |
Sage Weil | 4f17726 | 2011-07-26 11:31:08 -0700 | [diff] [blame] | 851 | struct inode *inode = dir->d_inode; |
Yehuda Sadeh | 4baa75e | 2010-01-07 15:36:32 -0800 | [diff] [blame] | 852 | struct ceph_dentry_info *di; |
| 853 | |
| 854 | BUG_ON(!inode); |
| 855 | |
| 856 | di = ceph_dentry(dn); |
| 857 | |
| 858 | spin_lock(&inode->i_lock); |
Sage Weil | c6ffe10 | 2011-11-03 09:23:36 -0700 | [diff] [blame] | 859 | if (!ceph_dir_test_complete(inode)) { |
Sage Weil | e8a7498 | 2010-04-15 14:08:49 -0700 | [diff] [blame] | 860 | spin_unlock(&inode->i_lock); |
| 861 | return; |
| 862 | } |
Yehuda Sadeh | 4baa75e | 2010-01-07 15:36:32 -0800 | [diff] [blame] | 863 | di->offset = ceph_inode(inode)->i_max_offset++; |
| 864 | spin_unlock(&inode->i_lock); |
| 865 | |
Nick Piggin | 2fd6b7f | 2011-01-07 17:49:34 +1100 | [diff] [blame] | 866 | spin_lock(&dir->d_lock); |
| 867 | spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED); |
Henry C Chang | 13a4214 | 2010-06-01 11:31:08 -0700 | [diff] [blame] | 868 | list_move(&dn->d_u.d_child, &dir->d_subdirs); |
Yehuda Sadeh | 4baa75e | 2010-01-07 15:36:32 -0800 | [diff] [blame] | 869 | dout("set_dentry_offset %p %lld (%p %p)\n", dn, di->offset, |
| 870 | dn->d_u.d_child.prev, dn->d_u.d_child.next); |
| 871 | spin_unlock(&dn->d_lock); |
Nick Piggin | 2fd6b7f | 2011-01-07 17:49:34 +1100 | [diff] [blame] | 872 | spin_unlock(&dir->d_lock); |
Yehuda Sadeh | 4baa75e | 2010-01-07 15:36:32 -0800 | [diff] [blame] | 873 | } |
| 874 | |
| 875 | /* |
Sage Weil | 1cd3935 | 2010-05-03 22:08:02 -0700 | [diff] [blame] | 876 | * splice a dentry to an inode. |
| 877 | * caller must hold directory i_mutex for this to be safe. |
| 878 | * |
| 879 | * we will only rehash the resulting dentry if @prehash is |
| 880 | * true; @prehash will be set to false (for the benefit of |
| 881 | * the caller) if we fail. |
| 882 | */ |
| 883 | static struct dentry *splice_dentry(struct dentry *dn, struct inode *in, |
Sage Weil | 467c525 | 2010-09-13 11:39:20 -0700 | [diff] [blame] | 884 | bool *prehash, bool set_offset) |
Sage Weil | 1cd3935 | 2010-05-03 22:08:02 -0700 | [diff] [blame] | 885 | { |
| 886 | struct dentry *realdn; |
| 887 | |
| 888 | BUG_ON(dn->d_inode); |
| 889 | |
| 890 | /* dn must be unhashed */ |
| 891 | if (!d_unhashed(dn)) |
| 892 | d_drop(dn); |
| 893 | realdn = d_materialise_unique(dn, in); |
| 894 | if (IS_ERR(realdn)) { |
Sage Weil | d69ed05 | 2010-06-21 10:38:14 -0700 | [diff] [blame] | 895 | pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n", |
| 896 | PTR_ERR(realdn), dn, in, ceph_vinop(in)); |
Sage Weil | 1cd3935 | 2010-05-03 22:08:02 -0700 | [diff] [blame] | 897 | if (prehash) |
| 898 | *prehash = false; /* don't rehash on error */ |
| 899 | dn = realdn; /* note realdn contains the error */ |
| 900 | goto out; |
| 901 | } else if (realdn) { |
| 902 | dout("dn %p (%d) spliced with %p (%d) " |
| 903 | "inode %p ino %llx.%llx\n", |
Nick Piggin | b7ab39f | 2011-01-07 17:49:32 +1100 | [diff] [blame] | 904 | dn, dn->d_count, |
| 905 | realdn, realdn->d_count, |
Sage Weil | 1cd3935 | 2010-05-03 22:08:02 -0700 | [diff] [blame] | 906 | realdn->d_inode, ceph_vinop(realdn->d_inode)); |
| 907 | dput(dn); |
| 908 | dn = realdn; |
| 909 | } else { |
| 910 | BUG_ON(!ceph_dentry(dn)); |
| 911 | dout("dn %p attached to %p ino %llx.%llx\n", |
| 912 | dn, dn->d_inode, ceph_vinop(dn->d_inode)); |
| 913 | } |
| 914 | if ((!prehash || *prehash) && d_unhashed(dn)) |
| 915 | d_rehash(dn); |
Sage Weil | 467c525 | 2010-09-13 11:39:20 -0700 | [diff] [blame] | 916 | if (set_offset) |
| 917 | ceph_set_dentry_offset(dn); |
Sage Weil | 1cd3935 | 2010-05-03 22:08:02 -0700 | [diff] [blame] | 918 | out: |
| 919 | return dn; |
| 920 | } |
| 921 | |
| 922 | /* |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 923 | * Incorporate results into the local cache. This is either just |
| 924 | * one inode, or a directory, dentry, and possibly linked-to inode (e.g., |
| 925 | * after a lookup). |
| 926 | * |
| 927 | * A reply may contain |
| 928 | * a directory inode along with a dentry. |
| 929 | * and/or a target inode |
| 930 | * |
| 931 | * Called with snap_rwsem (read). |
| 932 | */ |
| 933 | int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req, |
| 934 | struct ceph_mds_session *session) |
| 935 | { |
| 936 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; |
| 937 | struct inode *in = NULL; |
| 938 | struct ceph_mds_reply_inode *ininfo; |
| 939 | struct ceph_vino vino; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 940 | struct ceph_fs_client *fsc = ceph_sb_to_client(sb); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 941 | int i = 0; |
| 942 | int err = 0; |
| 943 | |
| 944 | dout("fill_trace %p is_dentry %d is_target %d\n", req, |
| 945 | rinfo->head->is_dentry, rinfo->head->is_target); |
| 946 | |
| 947 | #if 0 |
| 948 | /* |
| 949 | * Debugging hook: |
| 950 | * |
| 951 | * If we resend completed ops to a recovering mds, we get no |
| 952 | * trace. Since that is very rare, pretend this is the case |
| 953 | * to ensure the 'no trace' handlers in the callers behave. |
| 954 | * |
| 955 | * Fill in inodes unconditionally to avoid breaking cap |
| 956 | * invariants. |
| 957 | */ |
| 958 | if (rinfo->head->op & CEPH_MDS_OP_WRITE) { |
| 959 | pr_info("fill_trace faking empty trace on %lld %s\n", |
| 960 | req->r_tid, ceph_mds_op_name(rinfo->head->op)); |
| 961 | if (rinfo->head->is_dentry) { |
| 962 | rinfo->head->is_dentry = 0; |
| 963 | err = fill_inode(req->r_locked_dir, |
| 964 | &rinfo->diri, rinfo->dirfrag, |
| 965 | session, req->r_request_started, -1); |
| 966 | } |
| 967 | if (rinfo->head->is_target) { |
| 968 | rinfo->head->is_target = 0; |
| 969 | ininfo = rinfo->targeti.in; |
| 970 | vino.ino = le64_to_cpu(ininfo->ino); |
| 971 | vino.snap = le64_to_cpu(ininfo->snapid); |
| 972 | in = ceph_get_inode(sb, vino); |
| 973 | err = fill_inode(in, &rinfo->targeti, NULL, |
| 974 | session, req->r_request_started, |
| 975 | req->r_fmode); |
| 976 | iput(in); |
| 977 | } |
| 978 | } |
| 979 | #endif |
| 980 | |
| 981 | if (!rinfo->head->is_target && !rinfo->head->is_dentry) { |
| 982 | dout("fill_trace reply is empty!\n"); |
Sage Weil | 167c9e3 | 2010-05-14 10:02:57 -0700 | [diff] [blame] | 983 | if (rinfo->head->result == 0 && req->r_locked_dir) |
| 984 | ceph_invalidate_dir_request(req); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 985 | return 0; |
| 986 | } |
| 987 | |
| 988 | if (rinfo->head->is_dentry) { |
Sage Weil | 5b1daec | 2010-01-25 11:33:08 -0800 | [diff] [blame] | 989 | struct inode *dir = req->r_locked_dir; |
| 990 | |
| 991 | err = fill_inode(dir, &rinfo->diri, rinfo->dirfrag, |
| 992 | session, req->r_request_started, -1, |
| 993 | &req->r_caps_reservation); |
| 994 | if (err < 0) |
| 995 | return err; |
| 996 | } |
| 997 | |
Sage Weil | 9358c6d | 2010-03-30 13:54:41 -0700 | [diff] [blame] | 998 | /* |
| 999 | * ignore null lease/binding on snapdir ENOENT, or else we |
| 1000 | * will have trouble splicing in the virtual snapdir later |
| 1001 | */ |
| 1002 | if (rinfo->head->is_dentry && !req->r_aborted && |
| 1003 | (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name, |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1004 | fsc->mount_options->snapdir_name, |
Sage Weil | 9358c6d | 2010-03-30 13:54:41 -0700 | [diff] [blame] | 1005 | req->r_dentry->d_name.len))) { |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1006 | /* |
| 1007 | * lookup link rename : null -> possibly existing inode |
| 1008 | * mknod symlink mkdir : null -> new inode |
| 1009 | * unlink : linked -> null |
| 1010 | */ |
| 1011 | struct inode *dir = req->r_locked_dir; |
| 1012 | struct dentry *dn = req->r_dentry; |
| 1013 | bool have_dir_cap, have_lease; |
| 1014 | |
| 1015 | BUG_ON(!dn); |
| 1016 | BUG_ON(!dir); |
| 1017 | BUG_ON(dn->d_parent->d_inode != dir); |
| 1018 | BUG_ON(ceph_ino(dir) != |
| 1019 | le64_to_cpu(rinfo->diri.in->ino)); |
| 1020 | BUG_ON(ceph_snap(dir) != |
| 1021 | le64_to_cpu(rinfo->diri.in->snapid)); |
| 1022 | |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1023 | /* do we have a lease on the whole dir? */ |
| 1024 | have_dir_cap = |
| 1025 | (le32_to_cpu(rinfo->diri.in->cap.caps) & |
| 1026 | CEPH_CAP_FILE_SHARED); |
| 1027 | |
| 1028 | /* do we have a dn lease? */ |
| 1029 | have_lease = have_dir_cap || |
Sage Weil | 2f90b85 | 2011-07-26 11:28:25 -0700 | [diff] [blame] | 1030 | le32_to_cpu(rinfo->dlease->duration_ms); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1031 | if (!have_lease) |
| 1032 | dout("fill_trace no dentry lease or dir cap\n"); |
| 1033 | |
| 1034 | /* rename? */ |
| 1035 | if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) { |
| 1036 | dout(" src %p '%.*s' dst %p '%.*s'\n", |
| 1037 | req->r_old_dentry, |
| 1038 | req->r_old_dentry->d_name.len, |
| 1039 | req->r_old_dentry->d_name.name, |
| 1040 | dn, dn->d_name.len, dn->d_name.name); |
| 1041 | dout("fill_trace doing d_move %p -> %p\n", |
| 1042 | req->r_old_dentry, dn); |
Sage Weil | c10f5e1 | 2010-04-16 12:56:11 -0700 | [diff] [blame] | 1043 | |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1044 | d_move(req->r_old_dentry, dn); |
| 1045 | dout(" src %p '%.*s' dst %p '%.*s'\n", |
| 1046 | req->r_old_dentry, |
| 1047 | req->r_old_dentry->d_name.len, |
| 1048 | req->r_old_dentry->d_name.name, |
| 1049 | dn, dn->d_name.len, dn->d_name.name); |
Sage Weil | 81a6cf2 | 2010-05-14 09:35:38 -0700 | [diff] [blame] | 1050 | |
Sage Weil | c4a29f2 | 2009-12-21 11:42:18 -0800 | [diff] [blame] | 1051 | /* ensure target dentry is invalidated, despite |
| 1052 | rehashing bug in vfs_rename_dir */ |
Sage Weil | 81a6cf2 | 2010-05-14 09:35:38 -0700 | [diff] [blame] | 1053 | ceph_invalidate_dentry_lease(dn); |
| 1054 | |
Sage Weil | 09adc80 | 2011-02-04 21:38:47 -0800 | [diff] [blame] | 1055 | /* |
| 1056 | * d_move() puts the renamed dentry at the end of |
| 1057 | * d_subdirs. We need to assign it an appropriate |
| 1058 | * directory offset so we can behave when holding |
Sage Weil | c6ffe10 | 2011-11-03 09:23:36 -0700 | [diff] [blame] | 1059 | * D_COMPLETE. |
Sage Weil | 09adc80 | 2011-02-04 21:38:47 -0800 | [diff] [blame] | 1060 | */ |
| 1061 | ceph_set_dentry_offset(req->r_old_dentry); |
| 1062 | dout("dn %p gets new offset %lld\n", req->r_old_dentry, |
Sage Weil | 1cd3935 | 2010-05-03 22:08:02 -0700 | [diff] [blame] | 1063 | ceph_dentry(req->r_old_dentry)->offset); |
Sage Weil | 81a6cf2 | 2010-05-14 09:35:38 -0700 | [diff] [blame] | 1064 | |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1065 | dn = req->r_old_dentry; /* use old_dentry */ |
| 1066 | in = dn->d_inode; |
| 1067 | } |
| 1068 | |
| 1069 | /* null dentry? */ |
| 1070 | if (!rinfo->head->is_target) { |
| 1071 | dout("fill_trace null dentry\n"); |
| 1072 | if (dn->d_inode) { |
| 1073 | dout("d_delete %p\n", dn); |
| 1074 | d_delete(dn); |
| 1075 | } else { |
| 1076 | dout("d_instantiate %p NULL\n", dn); |
| 1077 | d_instantiate(dn, NULL); |
| 1078 | if (have_lease && d_unhashed(dn)) |
| 1079 | d_rehash(dn); |
| 1080 | update_dentry_lease(dn, rinfo->dlease, |
| 1081 | session, |
| 1082 | req->r_request_started); |
| 1083 | } |
| 1084 | goto done; |
| 1085 | } |
| 1086 | |
| 1087 | /* attach proper inode */ |
| 1088 | ininfo = rinfo->targeti.in; |
| 1089 | vino.ino = le64_to_cpu(ininfo->ino); |
| 1090 | vino.snap = le64_to_cpu(ininfo->snapid); |
Sage Weil | d8b16b3 | 2010-11-06 12:41:16 -0700 | [diff] [blame] | 1091 | in = dn->d_inode; |
| 1092 | if (!in) { |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1093 | in = ceph_get_inode(sb, vino); |
| 1094 | if (IS_ERR(in)) { |
| 1095 | pr_err("fill_trace bad get_inode " |
| 1096 | "%llx.%llx\n", vino.ino, vino.snap); |
| 1097 | err = PTR_ERR(in); |
| 1098 | d_delete(dn); |
| 1099 | goto done; |
| 1100 | } |
Sage Weil | 467c525 | 2010-09-13 11:39:20 -0700 | [diff] [blame] | 1101 | dn = splice_dentry(dn, in, &have_lease, true); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1102 | if (IS_ERR(dn)) { |
| 1103 | err = PTR_ERR(dn); |
| 1104 | goto done; |
| 1105 | } |
| 1106 | req->r_dentry = dn; /* may have spliced */ |
Sage Weil | 70b666c | 2011-05-27 09:24:26 -0700 | [diff] [blame] | 1107 | ihold(in); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1108 | } else if (ceph_ino(in) == vino.ino && |
| 1109 | ceph_snap(in) == vino.snap) { |
Sage Weil | 70b666c | 2011-05-27 09:24:26 -0700 | [diff] [blame] | 1110 | ihold(in); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1111 | } else { |
| 1112 | dout(" %p links to %p %llx.%llx, not %llx.%llx\n", |
| 1113 | dn, in, ceph_ino(in), ceph_snap(in), |
| 1114 | vino.ino, vino.snap); |
| 1115 | have_lease = false; |
| 1116 | in = NULL; |
| 1117 | } |
| 1118 | |
| 1119 | if (have_lease) |
| 1120 | update_dentry_lease(dn, rinfo->dlease, session, |
| 1121 | req->r_request_started); |
| 1122 | dout(" final dn %p\n", dn); |
| 1123 | i++; |
| 1124 | } else if (req->r_op == CEPH_MDS_OP_LOOKUPSNAP || |
| 1125 | req->r_op == CEPH_MDS_OP_MKSNAP) { |
| 1126 | struct dentry *dn = req->r_dentry; |
| 1127 | |
| 1128 | /* fill out a snapdir LOOKUPSNAP dentry */ |
| 1129 | BUG_ON(!dn); |
| 1130 | BUG_ON(!req->r_locked_dir); |
| 1131 | BUG_ON(ceph_snap(req->r_locked_dir) != CEPH_SNAPDIR); |
| 1132 | ininfo = rinfo->targeti.in; |
| 1133 | vino.ino = le64_to_cpu(ininfo->ino); |
| 1134 | vino.snap = le64_to_cpu(ininfo->snapid); |
| 1135 | in = ceph_get_inode(sb, vino); |
| 1136 | if (IS_ERR(in)) { |
| 1137 | pr_err("fill_inode get_inode badness %llx.%llx\n", |
| 1138 | vino.ino, vino.snap); |
| 1139 | err = PTR_ERR(in); |
| 1140 | d_delete(dn); |
| 1141 | goto done; |
| 1142 | } |
| 1143 | dout(" linking snapped dir %p to dn %p\n", in, dn); |
Sage Weil | 467c525 | 2010-09-13 11:39:20 -0700 | [diff] [blame] | 1144 | dn = splice_dentry(dn, in, NULL, true); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1145 | if (IS_ERR(dn)) { |
| 1146 | err = PTR_ERR(dn); |
| 1147 | goto done; |
| 1148 | } |
| 1149 | req->r_dentry = dn; /* may have spliced */ |
Sage Weil | 70b666c | 2011-05-27 09:24:26 -0700 | [diff] [blame] | 1150 | ihold(in); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1151 | rinfo->head->is_dentry = 1; /* fool notrace handlers */ |
| 1152 | } |
| 1153 | |
| 1154 | if (rinfo->head->is_target) { |
| 1155 | vino.ino = le64_to_cpu(rinfo->targeti.in->ino); |
| 1156 | vino.snap = le64_to_cpu(rinfo->targeti.in->snapid); |
| 1157 | |
| 1158 | if (in == NULL || ceph_ino(in) != vino.ino || |
| 1159 | ceph_snap(in) != vino.snap) { |
| 1160 | in = ceph_get_inode(sb, vino); |
| 1161 | if (IS_ERR(in)) { |
| 1162 | err = PTR_ERR(in); |
| 1163 | goto done; |
| 1164 | } |
| 1165 | } |
| 1166 | req->r_target_inode = in; |
| 1167 | |
| 1168 | err = fill_inode(in, |
| 1169 | &rinfo->targeti, NULL, |
| 1170 | session, req->r_request_started, |
| 1171 | (le32_to_cpu(rinfo->head->result) == 0) ? |
| 1172 | req->r_fmode : -1, |
| 1173 | &req->r_caps_reservation); |
| 1174 | if (err < 0) { |
| 1175 | pr_err("fill_inode badness %p %llx.%llx\n", |
| 1176 | in, ceph_vinop(in)); |
| 1177 | goto done; |
| 1178 | } |
| 1179 | } |
| 1180 | |
| 1181 | done: |
| 1182 | dout("fill_trace done err=%d\n", err); |
| 1183 | return err; |
| 1184 | } |
| 1185 | |
| 1186 | /* |
| 1187 | * Prepopulate our cache with readdir results, leases, etc. |
| 1188 | */ |
| 1189 | int ceph_readdir_prepopulate(struct ceph_mds_request *req, |
| 1190 | struct ceph_mds_session *session) |
| 1191 | { |
| 1192 | struct dentry *parent = req->r_dentry; |
| 1193 | struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; |
| 1194 | struct qstr dname; |
| 1195 | struct dentry *dn; |
| 1196 | struct inode *in; |
| 1197 | int err = 0, i; |
| 1198 | struct inode *snapdir = NULL; |
| 1199 | struct ceph_mds_request_head *rhead = req->r_request->front.iov_base; |
| 1200 | u64 frag = le32_to_cpu(rhead->args.readdir.frag); |
| 1201 | struct ceph_dentry_info *di; |
| 1202 | |
| 1203 | if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) { |
| 1204 | snapdir = ceph_get_snapdir(parent->d_inode); |
| 1205 | parent = d_find_alias(snapdir); |
| 1206 | dout("readdir_prepopulate %d items under SNAPDIR dn %p\n", |
| 1207 | rinfo->dir_nr, parent); |
| 1208 | } else { |
| 1209 | dout("readdir_prepopulate %d items under dn %p\n", |
| 1210 | rinfo->dir_nr, parent); |
| 1211 | if (rinfo->dir_dir) |
| 1212 | ceph_fill_dirfrag(parent->d_inode, rinfo->dir_dir); |
| 1213 | } |
| 1214 | |
| 1215 | for (i = 0; i < rinfo->dir_nr; i++) { |
| 1216 | struct ceph_vino vino; |
| 1217 | |
| 1218 | dname.name = rinfo->dir_dname[i]; |
| 1219 | dname.len = rinfo->dir_dname_len[i]; |
| 1220 | dname.hash = full_name_hash(dname.name, dname.len); |
| 1221 | |
| 1222 | vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino); |
| 1223 | vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid); |
| 1224 | |
| 1225 | retry_lookup: |
| 1226 | dn = d_lookup(parent, &dname); |
| 1227 | dout("d_lookup on parent=%p name=%.*s got %p\n", |
| 1228 | parent, dname.len, dname.name, dn); |
| 1229 | |
| 1230 | if (!dn) { |
| 1231 | dn = d_alloc(parent, &dname); |
| 1232 | dout("d_alloc %p '%.*s' = %p\n", parent, |
| 1233 | dname.len, dname.name, dn); |
| 1234 | if (dn == NULL) { |
| 1235 | dout("d_alloc badness\n"); |
| 1236 | err = -ENOMEM; |
| 1237 | goto out; |
| 1238 | } |
| 1239 | err = ceph_init_dentry(dn); |
Sage Weil | 8c69673 | 2010-07-22 14:11:56 -0700 | [diff] [blame] | 1240 | if (err < 0) { |
| 1241 | dput(dn); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1242 | goto out; |
Sage Weil | 8c69673 | 2010-07-22 14:11:56 -0700 | [diff] [blame] | 1243 | } |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1244 | } else if (dn->d_inode && |
| 1245 | (ceph_ino(dn->d_inode) != vino.ino || |
| 1246 | ceph_snap(dn->d_inode) != vino.snap)) { |
| 1247 | dout(" dn %p points to wrong inode %p\n", |
| 1248 | dn, dn->d_inode); |
| 1249 | d_delete(dn); |
| 1250 | dput(dn); |
| 1251 | goto retry_lookup; |
| 1252 | } else { |
| 1253 | /* reorder parent's d_subdirs */ |
Nick Piggin | 2fd6b7f | 2011-01-07 17:49:34 +1100 | [diff] [blame] | 1254 | spin_lock(&parent->d_lock); |
| 1255 | spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1256 | list_move(&dn->d_u.d_child, &parent->d_subdirs); |
| 1257 | spin_unlock(&dn->d_lock); |
Nick Piggin | 2fd6b7f | 2011-01-07 17:49:34 +1100 | [diff] [blame] | 1258 | spin_unlock(&parent->d_lock); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1259 | } |
| 1260 | |
| 1261 | di = dn->d_fsdata; |
| 1262 | di->offset = ceph_make_fpos(frag, i + req->r_readdir_offset); |
| 1263 | |
| 1264 | /* inode */ |
| 1265 | if (dn->d_inode) { |
| 1266 | in = dn->d_inode; |
| 1267 | } else { |
| 1268 | in = ceph_get_inode(parent->d_sb, vino); |
Dan Carpenter | ac1f12e | 2010-08-25 09:11:35 +0200 | [diff] [blame] | 1269 | if (IS_ERR(in)) { |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1270 | dout("new_inode badness\n"); |
| 1271 | d_delete(dn); |
| 1272 | dput(dn); |
Dan Carpenter | ac1f12e | 2010-08-25 09:11:35 +0200 | [diff] [blame] | 1273 | err = PTR_ERR(in); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1274 | goto out; |
| 1275 | } |
Sage Weil | 467c525 | 2010-09-13 11:39:20 -0700 | [diff] [blame] | 1276 | dn = splice_dentry(dn, in, NULL, false); |
Sage Weil | d69ed05 | 2010-06-21 10:38:14 -0700 | [diff] [blame] | 1277 | if (IS_ERR(dn)) |
| 1278 | dn = NULL; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1279 | } |
| 1280 | |
| 1281 | if (fill_inode(in, &rinfo->dir_in[i], NULL, session, |
| 1282 | req->r_request_started, -1, |
| 1283 | &req->r_caps_reservation) < 0) { |
| 1284 | pr_err("fill_inode badness on %p\n", in); |
Sage Weil | d69ed05 | 2010-06-21 10:38:14 -0700 | [diff] [blame] | 1285 | goto next_item; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1286 | } |
Sage Weil | d69ed05 | 2010-06-21 10:38:14 -0700 | [diff] [blame] | 1287 | if (dn) |
| 1288 | update_dentry_lease(dn, rinfo->dir_dlease[i], |
| 1289 | req->r_session, |
| 1290 | req->r_request_started); |
| 1291 | next_item: |
| 1292 | if (dn) |
| 1293 | dput(dn); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1294 | } |
| 1295 | req->r_did_prepopulate = true; |
| 1296 | |
| 1297 | out: |
| 1298 | if (snapdir) { |
| 1299 | iput(snapdir); |
| 1300 | dput(parent); |
| 1301 | } |
| 1302 | dout("readdir_prepopulate done\n"); |
| 1303 | return err; |
| 1304 | } |
| 1305 | |
| 1306 | int ceph_inode_set_size(struct inode *inode, loff_t size) |
| 1307 | { |
| 1308 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 1309 | int ret = 0; |
| 1310 | |
| 1311 | spin_lock(&inode->i_lock); |
| 1312 | dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size); |
| 1313 | inode->i_size = size; |
| 1314 | inode->i_blocks = (size + (1 << 9) - 1) >> 9; |
| 1315 | |
| 1316 | /* tell the MDS if we are approaching max_size */ |
| 1317 | if ((size << 1) >= ci->i_max_size && |
| 1318 | (ci->i_reported_size << 1) < ci->i_max_size) |
| 1319 | ret = 1; |
| 1320 | |
| 1321 | spin_unlock(&inode->i_lock); |
| 1322 | return ret; |
| 1323 | } |
| 1324 | |
| 1325 | /* |
| 1326 | * Write back inode data in a worker thread. (This can't be done |
| 1327 | * in the message handler context.) |
| 1328 | */ |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 1329 | void ceph_queue_writeback(struct inode *inode) |
| 1330 | { |
| 1331 | if (queue_work(ceph_inode_to_client(inode)->wb_wq, |
| 1332 | &ceph_inode(inode)->i_wb_work)) { |
Sage Weil | 2c27c9a | 2010-02-17 15:45:51 -0800 | [diff] [blame] | 1333 | dout("ceph_queue_writeback %p\n", inode); |
Sage Weil | 70b666c | 2011-05-27 09:24:26 -0700 | [diff] [blame] | 1334 | ihold(inode); |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 1335 | } else { |
Sage Weil | 2c27c9a | 2010-02-17 15:45:51 -0800 | [diff] [blame] | 1336 | dout("ceph_queue_writeback %p failed\n", inode); |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 1337 | } |
| 1338 | } |
| 1339 | |
| 1340 | static void ceph_writeback_work(struct work_struct *work) |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1341 | { |
| 1342 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, |
| 1343 | i_wb_work); |
| 1344 | struct inode *inode = &ci->vfs_inode; |
| 1345 | |
| 1346 | dout("writeback %p\n", inode); |
| 1347 | filemap_fdatawrite(&inode->i_data); |
| 1348 | iput(inode); |
| 1349 | } |
| 1350 | |
| 1351 | /* |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 1352 | * queue an async invalidation |
| 1353 | */ |
| 1354 | void ceph_queue_invalidate(struct inode *inode) |
| 1355 | { |
| 1356 | if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq, |
| 1357 | &ceph_inode(inode)->i_pg_inv_work)) { |
| 1358 | dout("ceph_queue_invalidate %p\n", inode); |
Sage Weil | 70b666c | 2011-05-27 09:24:26 -0700 | [diff] [blame] | 1359 | ihold(inode); |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 1360 | } else { |
| 1361 | dout("ceph_queue_invalidate %p failed\n", inode); |
| 1362 | } |
| 1363 | } |
| 1364 | |
| 1365 | /* |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1366 | * Invalidate inode pages in a worker thread. (This can't be done |
| 1367 | * in the message handler context.) |
| 1368 | */ |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 1369 | static void ceph_invalidate_work(struct work_struct *work) |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1370 | { |
| 1371 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, |
| 1372 | i_pg_inv_work); |
| 1373 | struct inode *inode = &ci->vfs_inode; |
| 1374 | u32 orig_gen; |
| 1375 | int check = 0; |
| 1376 | |
| 1377 | spin_lock(&inode->i_lock); |
| 1378 | dout("invalidate_pages %p gen %d revoking %d\n", inode, |
| 1379 | ci->i_rdcache_gen, ci->i_rdcache_revoking); |
Sage Weil | cd045cb | 2010-11-04 11:05:05 -0700 | [diff] [blame] | 1380 | if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1381 | /* nevermind! */ |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1382 | spin_unlock(&inode->i_lock); |
| 1383 | goto out; |
| 1384 | } |
| 1385 | orig_gen = ci->i_rdcache_gen; |
| 1386 | spin_unlock(&inode->i_lock); |
| 1387 | |
Sage Weil | 83eaea2 | 2011-08-24 14:07:01 -0700 | [diff] [blame] | 1388 | truncate_inode_pages(&inode->i_data, 0); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1389 | |
| 1390 | spin_lock(&inode->i_lock); |
Sage Weil | cd045cb | 2010-11-04 11:05:05 -0700 | [diff] [blame] | 1391 | if (orig_gen == ci->i_rdcache_gen && |
| 1392 | orig_gen == ci->i_rdcache_revoking) { |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1393 | dout("invalidate_pages %p gen %d successful\n", inode, |
| 1394 | ci->i_rdcache_gen); |
Sage Weil | cd045cb | 2010-11-04 11:05:05 -0700 | [diff] [blame] | 1395 | ci->i_rdcache_revoking--; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1396 | check = 1; |
| 1397 | } else { |
Sage Weil | cd045cb | 2010-11-04 11:05:05 -0700 | [diff] [blame] | 1398 | dout("invalidate_pages %p gen %d raced, now %d revoking %d\n", |
| 1399 | inode, orig_gen, ci->i_rdcache_gen, |
| 1400 | ci->i_rdcache_revoking); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1401 | } |
| 1402 | spin_unlock(&inode->i_lock); |
| 1403 | |
| 1404 | if (check) |
| 1405 | ceph_check_caps(ci, 0, NULL); |
| 1406 | out: |
| 1407 | iput(inode); |
| 1408 | } |
| 1409 | |
| 1410 | |
| 1411 | /* |
| 1412 | * called by trunc_wq; take i_mutex ourselves |
| 1413 | * |
| 1414 | * We also truncate in a separate thread as well. |
| 1415 | */ |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 1416 | static void ceph_vmtruncate_work(struct work_struct *work) |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1417 | { |
| 1418 | struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info, |
| 1419 | i_vmtruncate_work); |
| 1420 | struct inode *inode = &ci->vfs_inode; |
| 1421 | |
| 1422 | dout("vmtruncate_work %p\n", inode); |
| 1423 | mutex_lock(&inode->i_mutex); |
| 1424 | __ceph_do_pending_vmtruncate(inode); |
| 1425 | mutex_unlock(&inode->i_mutex); |
| 1426 | iput(inode); |
| 1427 | } |
| 1428 | |
| 1429 | /* |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 1430 | * Queue an async vmtruncate. If we fail to queue work, we will handle |
| 1431 | * the truncation the next time we call __ceph_do_pending_vmtruncate. |
| 1432 | */ |
| 1433 | void ceph_queue_vmtruncate(struct inode *inode) |
| 1434 | { |
| 1435 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 1436 | |
Cheng Renquan | 640ef79 | 2010-03-26 17:40:33 +0800 | [diff] [blame] | 1437 | if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq, |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 1438 | &ci->i_vmtruncate_work)) { |
| 1439 | dout("ceph_queue_vmtruncate %p\n", inode); |
Sage Weil | 70b666c | 2011-05-27 09:24:26 -0700 | [diff] [blame] | 1440 | ihold(inode); |
Sage Weil | 3c6f6b7 | 2010-02-09 15:24:44 -0800 | [diff] [blame] | 1441 | } else { |
| 1442 | dout("ceph_queue_vmtruncate %p failed, pending=%d\n", |
| 1443 | inode, ci->i_truncate_pending); |
| 1444 | } |
| 1445 | } |
| 1446 | |
| 1447 | /* |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1448 | * called with i_mutex held. |
| 1449 | * |
| 1450 | * Make sure any pending truncation is applied before doing anything |
| 1451 | * that may depend on it. |
| 1452 | */ |
| 1453 | void __ceph_do_pending_vmtruncate(struct inode *inode) |
| 1454 | { |
| 1455 | struct ceph_inode_info *ci = ceph_inode(inode); |
| 1456 | u64 to; |
| 1457 | int wrbuffer_refs, wake = 0; |
| 1458 | |
| 1459 | retry: |
| 1460 | spin_lock(&inode->i_lock); |
| 1461 | if (ci->i_truncate_pending == 0) { |
| 1462 | dout("__do_pending_vmtruncate %p none pending\n", inode); |
| 1463 | spin_unlock(&inode->i_lock); |
| 1464 | return; |
| 1465 | } |
| 1466 | |
| 1467 | /* |
| 1468 | * make sure any dirty snapped pages are flushed before we |
| 1469 | * possibly truncate them.. so write AND block! |
| 1470 | */ |
| 1471 | if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) { |
| 1472 | dout("__do_pending_vmtruncate %p flushing snaps first\n", |
| 1473 | inode); |
| 1474 | spin_unlock(&inode->i_lock); |
| 1475 | filemap_write_and_wait_range(&inode->i_data, 0, |
| 1476 | inode->i_sb->s_maxbytes); |
| 1477 | goto retry; |
| 1478 | } |
| 1479 | |
| 1480 | to = ci->i_truncate_size; |
| 1481 | wrbuffer_refs = ci->i_wrbuffer_ref; |
| 1482 | dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode, |
| 1483 | ci->i_truncate_pending, to); |
| 1484 | spin_unlock(&inode->i_lock); |
| 1485 | |
| 1486 | truncate_inode_pages(inode->i_mapping, to); |
| 1487 | |
| 1488 | spin_lock(&inode->i_lock); |
| 1489 | ci->i_truncate_pending--; |
| 1490 | if (ci->i_truncate_pending == 0) |
| 1491 | wake = 1; |
| 1492 | spin_unlock(&inode->i_lock); |
| 1493 | |
| 1494 | if (wrbuffer_refs == 0) |
| 1495 | ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); |
| 1496 | if (wake) |
Yehuda Sadeh | 03066f2 | 2010-07-27 13:11:08 -0700 | [diff] [blame] | 1497 | wake_up_all(&ci->i_cap_wq); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1498 | } |
| 1499 | |
| 1500 | |
| 1501 | /* |
| 1502 | * symlinks |
| 1503 | */ |
| 1504 | static void *ceph_sym_follow_link(struct dentry *dentry, struct nameidata *nd) |
| 1505 | { |
| 1506 | struct ceph_inode_info *ci = ceph_inode(dentry->d_inode); |
| 1507 | nd_set_link(nd, ci->i_symlink); |
| 1508 | return NULL; |
| 1509 | } |
| 1510 | |
| 1511 | static const struct inode_operations ceph_symlink_iops = { |
| 1512 | .readlink = generic_readlink, |
| 1513 | .follow_link = ceph_sym_follow_link, |
| 1514 | }; |
| 1515 | |
| 1516 | /* |
| 1517 | * setattr |
| 1518 | */ |
| 1519 | int ceph_setattr(struct dentry *dentry, struct iattr *attr) |
| 1520 | { |
| 1521 | struct inode *inode = dentry->d_inode; |
| 1522 | struct ceph_inode_info *ci = ceph_inode(inode); |
Sage Weil | 5f21c96 | 2011-07-26 11:30:29 -0700 | [diff] [blame] | 1523 | struct inode *parent_inode; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1524 | const unsigned int ia_valid = attr->ia_valid; |
| 1525 | struct ceph_mds_request *req; |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1526 | struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1527 | int issued; |
| 1528 | int release = 0, dirtied = 0; |
| 1529 | int mask = 0; |
| 1530 | int err = 0; |
Sage Weil | fca65b4 | 2011-05-04 11:33:47 -0700 | [diff] [blame] | 1531 | int inode_dirty_flags = 0; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1532 | |
| 1533 | if (ceph_snap(inode) != CEPH_NOSNAP) |
| 1534 | return -EROFS; |
| 1535 | |
| 1536 | __ceph_do_pending_vmtruncate(inode); |
| 1537 | |
| 1538 | err = inode_change_ok(inode, attr); |
| 1539 | if (err != 0) |
| 1540 | return err; |
| 1541 | |
| 1542 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR, |
| 1543 | USE_AUTH_MDS); |
| 1544 | if (IS_ERR(req)) |
| 1545 | return PTR_ERR(req); |
| 1546 | |
| 1547 | spin_lock(&inode->i_lock); |
| 1548 | issued = __ceph_caps_issued(ci, NULL); |
| 1549 | dout("setattr %p issued %s\n", inode, ceph_cap_string(issued)); |
| 1550 | |
| 1551 | if (ia_valid & ATTR_UID) { |
| 1552 | dout("setattr %p uid %d -> %d\n", inode, |
| 1553 | inode->i_uid, attr->ia_uid); |
| 1554 | if (issued & CEPH_CAP_AUTH_EXCL) { |
| 1555 | inode->i_uid = attr->ia_uid; |
| 1556 | dirtied |= CEPH_CAP_AUTH_EXCL; |
| 1557 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || |
| 1558 | attr->ia_uid != inode->i_uid) { |
| 1559 | req->r_args.setattr.uid = cpu_to_le32(attr->ia_uid); |
| 1560 | mask |= CEPH_SETATTR_UID; |
| 1561 | release |= CEPH_CAP_AUTH_SHARED; |
| 1562 | } |
| 1563 | } |
| 1564 | if (ia_valid & ATTR_GID) { |
| 1565 | dout("setattr %p gid %d -> %d\n", inode, |
| 1566 | inode->i_gid, attr->ia_gid); |
| 1567 | if (issued & CEPH_CAP_AUTH_EXCL) { |
| 1568 | inode->i_gid = attr->ia_gid; |
| 1569 | dirtied |= CEPH_CAP_AUTH_EXCL; |
| 1570 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || |
| 1571 | attr->ia_gid != inode->i_gid) { |
| 1572 | req->r_args.setattr.gid = cpu_to_le32(attr->ia_gid); |
| 1573 | mask |= CEPH_SETATTR_GID; |
| 1574 | release |= CEPH_CAP_AUTH_SHARED; |
| 1575 | } |
| 1576 | } |
| 1577 | if (ia_valid & ATTR_MODE) { |
| 1578 | dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode, |
| 1579 | attr->ia_mode); |
| 1580 | if (issued & CEPH_CAP_AUTH_EXCL) { |
| 1581 | inode->i_mode = attr->ia_mode; |
| 1582 | dirtied |= CEPH_CAP_AUTH_EXCL; |
| 1583 | } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 || |
| 1584 | attr->ia_mode != inode->i_mode) { |
| 1585 | req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode); |
| 1586 | mask |= CEPH_SETATTR_MODE; |
| 1587 | release |= CEPH_CAP_AUTH_SHARED; |
| 1588 | } |
| 1589 | } |
| 1590 | |
| 1591 | if (ia_valid & ATTR_ATIME) { |
| 1592 | dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode, |
| 1593 | inode->i_atime.tv_sec, inode->i_atime.tv_nsec, |
| 1594 | attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec); |
| 1595 | if (issued & CEPH_CAP_FILE_EXCL) { |
| 1596 | ci->i_time_warp_seq++; |
| 1597 | inode->i_atime = attr->ia_atime; |
| 1598 | dirtied |= CEPH_CAP_FILE_EXCL; |
| 1599 | } else if ((issued & CEPH_CAP_FILE_WR) && |
| 1600 | timespec_compare(&inode->i_atime, |
| 1601 | &attr->ia_atime) < 0) { |
| 1602 | inode->i_atime = attr->ia_atime; |
| 1603 | dirtied |= CEPH_CAP_FILE_WR; |
| 1604 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || |
| 1605 | !timespec_equal(&inode->i_atime, &attr->ia_atime)) { |
| 1606 | ceph_encode_timespec(&req->r_args.setattr.atime, |
| 1607 | &attr->ia_atime); |
| 1608 | mask |= CEPH_SETATTR_ATIME; |
| 1609 | release |= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD | |
| 1610 | CEPH_CAP_FILE_WR; |
| 1611 | } |
| 1612 | } |
| 1613 | if (ia_valid & ATTR_MTIME) { |
| 1614 | dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode, |
| 1615 | inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec, |
| 1616 | attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec); |
| 1617 | if (issued & CEPH_CAP_FILE_EXCL) { |
| 1618 | ci->i_time_warp_seq++; |
| 1619 | inode->i_mtime = attr->ia_mtime; |
| 1620 | dirtied |= CEPH_CAP_FILE_EXCL; |
| 1621 | } else if ((issued & CEPH_CAP_FILE_WR) && |
| 1622 | timespec_compare(&inode->i_mtime, |
| 1623 | &attr->ia_mtime) < 0) { |
| 1624 | inode->i_mtime = attr->ia_mtime; |
| 1625 | dirtied |= CEPH_CAP_FILE_WR; |
| 1626 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || |
| 1627 | !timespec_equal(&inode->i_mtime, &attr->ia_mtime)) { |
| 1628 | ceph_encode_timespec(&req->r_args.setattr.mtime, |
| 1629 | &attr->ia_mtime); |
| 1630 | mask |= CEPH_SETATTR_MTIME; |
| 1631 | release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | |
| 1632 | CEPH_CAP_FILE_WR; |
| 1633 | } |
| 1634 | } |
| 1635 | if (ia_valid & ATTR_SIZE) { |
| 1636 | dout("setattr %p size %lld -> %lld\n", inode, |
| 1637 | inode->i_size, attr->ia_size); |
| 1638 | if (attr->ia_size > inode->i_sb->s_maxbytes) { |
| 1639 | err = -EINVAL; |
| 1640 | goto out; |
| 1641 | } |
| 1642 | if ((issued & CEPH_CAP_FILE_EXCL) && |
| 1643 | attr->ia_size > inode->i_size) { |
| 1644 | inode->i_size = attr->ia_size; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1645 | inode->i_blocks = |
| 1646 | (attr->ia_size + (1 << 9) - 1) >> 9; |
| 1647 | inode->i_ctime = attr->ia_ctime; |
| 1648 | ci->i_reported_size = attr->ia_size; |
| 1649 | dirtied |= CEPH_CAP_FILE_EXCL; |
| 1650 | } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 || |
| 1651 | attr->ia_size != inode->i_size) { |
| 1652 | req->r_args.setattr.size = cpu_to_le64(attr->ia_size); |
| 1653 | req->r_args.setattr.old_size = |
| 1654 | cpu_to_le64(inode->i_size); |
| 1655 | mask |= CEPH_SETATTR_SIZE; |
| 1656 | release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD | |
| 1657 | CEPH_CAP_FILE_WR; |
| 1658 | } |
| 1659 | } |
| 1660 | |
| 1661 | /* these do nothing */ |
| 1662 | if (ia_valid & ATTR_CTIME) { |
| 1663 | bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME| |
| 1664 | ATTR_MODE|ATTR_UID|ATTR_GID)) == 0; |
| 1665 | dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode, |
| 1666 | inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, |
| 1667 | attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec, |
| 1668 | only ? "ctime only" : "ignored"); |
| 1669 | inode->i_ctime = attr->ia_ctime; |
| 1670 | if (only) { |
| 1671 | /* |
| 1672 | * if kernel wants to dirty ctime but nothing else, |
| 1673 | * we need to choose a cap to dirty under, or do |
| 1674 | * a almost-no-op setattr |
| 1675 | */ |
| 1676 | if (issued & CEPH_CAP_AUTH_EXCL) |
| 1677 | dirtied |= CEPH_CAP_AUTH_EXCL; |
| 1678 | else if (issued & CEPH_CAP_FILE_EXCL) |
| 1679 | dirtied |= CEPH_CAP_FILE_EXCL; |
| 1680 | else if (issued & CEPH_CAP_XATTR_EXCL) |
| 1681 | dirtied |= CEPH_CAP_XATTR_EXCL; |
| 1682 | else |
| 1683 | mask |= CEPH_SETATTR_CTIME; |
| 1684 | } |
| 1685 | } |
| 1686 | if (ia_valid & ATTR_FILE) |
| 1687 | dout("setattr %p ATTR_FILE ... hrm!\n", inode); |
| 1688 | |
| 1689 | if (dirtied) { |
Sage Weil | fca65b4 | 2011-05-04 11:33:47 -0700 | [diff] [blame] | 1690 | inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1691 | inode->i_ctime = CURRENT_TIME; |
| 1692 | } |
| 1693 | |
| 1694 | release &= issued; |
| 1695 | spin_unlock(&inode->i_lock); |
| 1696 | |
Sage Weil | fca65b4 | 2011-05-04 11:33:47 -0700 | [diff] [blame] | 1697 | if (inode_dirty_flags) |
| 1698 | __mark_inode_dirty(inode, inode_dirty_flags); |
| 1699 | |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1700 | if (mask) { |
Sage Weil | 70b666c | 2011-05-27 09:24:26 -0700 | [diff] [blame] | 1701 | req->r_inode = inode; |
| 1702 | ihold(inode); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1703 | req->r_inode_drop = release; |
| 1704 | req->r_args.setattr.mask = cpu_to_le32(mask); |
| 1705 | req->r_num_caps = 1; |
Sage Weil | 5f21c96 | 2011-07-26 11:30:29 -0700 | [diff] [blame] | 1706 | parent_inode = ceph_get_dentry_parent_inode(dentry); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1707 | err = ceph_mdsc_do_request(mdsc, parent_inode, req); |
Sage Weil | 5f21c96 | 2011-07-26 11:30:29 -0700 | [diff] [blame] | 1708 | iput(parent_inode); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1709 | } |
| 1710 | dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err, |
| 1711 | ceph_cap_string(dirtied), mask); |
| 1712 | |
| 1713 | ceph_mdsc_put_request(req); |
| 1714 | __ceph_do_pending_vmtruncate(inode); |
| 1715 | return err; |
| 1716 | out: |
| 1717 | spin_unlock(&inode->i_lock); |
| 1718 | ceph_mdsc_put_request(req); |
| 1719 | return err; |
| 1720 | } |
| 1721 | |
| 1722 | /* |
| 1723 | * Verify that we have a lease on the given mask. If not, |
| 1724 | * do a getattr against an mds. |
| 1725 | */ |
| 1726 | int ceph_do_getattr(struct inode *inode, int mask) |
| 1727 | { |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 1728 | struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); |
| 1729 | struct ceph_mds_client *mdsc = fsc->mdsc; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1730 | struct ceph_mds_request *req; |
| 1731 | int err; |
| 1732 | |
| 1733 | if (ceph_snap(inode) == CEPH_SNAPDIR) { |
| 1734 | dout("do_getattr inode %p SNAPDIR\n", inode); |
| 1735 | return 0; |
| 1736 | } |
| 1737 | |
Sage Weil | b7495fc | 2010-11-09 12:43:12 -0800 | [diff] [blame] | 1738 | dout("do_getattr inode %p mask %s mode 0%o\n", inode, ceph_cap_string(mask), inode->i_mode); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1739 | if (ceph_caps_issued_mask(ceph_inode(inode), mask, 1)) |
| 1740 | return 0; |
| 1741 | |
| 1742 | req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS); |
| 1743 | if (IS_ERR(req)) |
| 1744 | return PTR_ERR(req); |
Sage Weil | 70b666c | 2011-05-27 09:24:26 -0700 | [diff] [blame] | 1745 | req->r_inode = inode; |
| 1746 | ihold(inode); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1747 | req->r_num_caps = 1; |
| 1748 | req->r_args.getattr.mask = cpu_to_le32(mask); |
| 1749 | err = ceph_mdsc_do_request(mdsc, NULL, req); |
| 1750 | ceph_mdsc_put_request(req); |
| 1751 | dout("do_getattr result=%d\n", err); |
| 1752 | return err; |
| 1753 | } |
| 1754 | |
| 1755 | |
| 1756 | /* |
| 1757 | * Check inode permissions. We verify we have a valid value for |
| 1758 | * the AUTH cap, then call the generic handler. |
| 1759 | */ |
Al Viro | 10556cb | 2011-06-20 19:28:19 -0400 | [diff] [blame] | 1760 | int ceph_permission(struct inode *inode, int mask) |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1761 | { |
Nick Piggin | b74c79e | 2011-01-07 17:49:58 +1100 | [diff] [blame] | 1762 | int err; |
| 1763 | |
Al Viro | 10556cb | 2011-06-20 19:28:19 -0400 | [diff] [blame] | 1764 | if (mask & MAY_NOT_BLOCK) |
Nick Piggin | b74c79e | 2011-01-07 17:49:58 +1100 | [diff] [blame] | 1765 | return -ECHILD; |
| 1766 | |
| 1767 | err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1768 | |
| 1769 | if (!err) |
Al Viro | 2830ba7 | 2011-06-20 19:16:29 -0400 | [diff] [blame] | 1770 | err = generic_permission(inode, mask); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1771 | return err; |
| 1772 | } |
| 1773 | |
| 1774 | /* |
| 1775 | * Get all attributes. Hopefully somedata we'll have a statlite() |
| 1776 | * and can limit the fields we require to be accurate. |
| 1777 | */ |
| 1778 | int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry, |
| 1779 | struct kstat *stat) |
| 1780 | { |
| 1781 | struct inode *inode = dentry->d_inode; |
Sage Weil | 232d4b0 | 2009-10-21 11:21:49 -0700 | [diff] [blame] | 1782 | struct ceph_inode_info *ci = ceph_inode(inode); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1783 | int err; |
| 1784 | |
| 1785 | err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL); |
| 1786 | if (!err) { |
| 1787 | generic_fillattr(inode, stat); |
Yehuda Sadeh | ad1fee9 | 2011-01-21 16:44:03 -0800 | [diff] [blame] | 1788 | stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino); |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1789 | if (ceph_snap(inode) != CEPH_NOSNAP) |
| 1790 | stat->dev = ceph_snap(inode); |
| 1791 | else |
| 1792 | stat->dev = 0; |
Sage Weil | 232d4b0 | 2009-10-21 11:21:49 -0700 | [diff] [blame] | 1793 | if (S_ISDIR(inode->i_mode)) { |
Yehuda Sadeh | 1c1266b | 2011-01-12 16:53:27 -0800 | [diff] [blame] | 1794 | if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), |
| 1795 | RBYTES)) |
| 1796 | stat->size = ci->i_rbytes; |
| 1797 | else |
| 1798 | stat->size = ci->i_files + ci->i_subdirs; |
Sage Weil | 232d4b0 | 2009-10-21 11:21:49 -0700 | [diff] [blame] | 1799 | stat->blocks = 0; |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1800 | stat->blksize = 65536; |
Sage Weil | 232d4b0 | 2009-10-21 11:21:49 -0700 | [diff] [blame] | 1801 | } |
Sage Weil | 355da1e | 2009-10-06 11:31:08 -0700 | [diff] [blame] | 1802 | } |
| 1803 | return err; |
| 1804 | } |