blob: 5849b88bbed3cfc333318574db80ded6305e0d9c [file] [log] [blame]
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07001#include <linux/ceph/ceph_debug.h>
Sage Weil355da1e2009-10-06 11:31:08 -07002
3#include <linux/module.h>
4#include <linux/fs.h>
Sage Weil355da1e2009-10-06 11:31:08 -07005#include <linux/slab.h>
6#include <linux/string.h>
7#include <linux/uaccess.h>
8#include <linux/kernel.h>
Sage Weil355da1e2009-10-06 11:31:08 -07009#include <linux/writeback.h>
10#include <linux/vmalloc.h>
Linus Torvalds4db658e2014-01-28 18:06:18 -080011#include <linux/posix_acl.h>
Yan, Zheng3e7fbe92014-04-18 16:00:30 +080012#include <linux/random.h>
Sage Weil355da1e2009-10-06 11:31:08 -070013
14#include "super.h"
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070015#include "mds_client.h"
Milosz Tanski99ccbd22013-08-21 17:29:54 -040016#include "cache.h"
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070017#include <linux/ceph/decode.h>
Sage Weil355da1e2009-10-06 11:31:08 -070018
19/*
20 * Ceph inode operations
21 *
22 * Implement basic inode helpers (get, alloc) and inode ops (getattr,
23 * setattr, etc.), xattr helpers, and helpers for assimilating
24 * metadata returned by the MDS into our cache.
25 *
26 * Also define helpers for doing asynchronous writeback, invalidation,
27 * and truncation for the benefit of those who can't afford to block
28 * (typically because they are in the message handler path).
29 */
30
31static const struct inode_operations ceph_symlink_iops;
32
Sage Weil3c6f6b72010-02-09 15:24:44 -080033static void ceph_invalidate_work(struct work_struct *work);
34static void ceph_writeback_work(struct work_struct *work);
35static void ceph_vmtruncate_work(struct work_struct *work);
Sage Weil355da1e2009-10-06 11:31:08 -070036
37/*
38 * find or create an inode, given the ceph ino number
39 */
Yehuda Sadehad1fee92011-01-21 16:44:03 -080040static int ceph_set_ino_cb(struct inode *inode, void *data)
41{
42 ceph_inode(inode)->i_vino = *(struct ceph_vino *)data;
43 inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data);
44 return 0;
45}
46
Sage Weil355da1e2009-10-06 11:31:08 -070047struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino)
48{
49 struct inode *inode;
50 ino_t t = ceph_vino_to_ino(vino);
51
52 inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino);
53 if (inode == NULL)
54 return ERR_PTR(-ENOMEM);
55 if (inode->i_state & I_NEW) {
56 dout("get_inode created new inode %p %llx.%llx ino %llx\n",
57 inode, ceph_vinop(inode), (u64)inode->i_ino);
58 unlock_new_inode(inode);
59 }
60
61 dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino,
62 vino.snap, inode);
63 return inode;
64}
65
66/*
67 * get/constuct snapdir inode for a given directory
68 */
69struct inode *ceph_get_snapdir(struct inode *parent)
70{
71 struct ceph_vino vino = {
72 .ino = ceph_ino(parent),
73 .snap = CEPH_SNAPDIR,
74 };
75 struct inode *inode = ceph_get_inode(parent->i_sb, vino);
Sage Weilb377ff12009-11-11 15:22:37 -080076 struct ceph_inode_info *ci = ceph_inode(inode);
Sage Weil355da1e2009-10-06 11:31:08 -070077
78 BUG_ON(!S_ISDIR(parent->i_mode));
79 if (IS_ERR(inode))
Julia Lawall7e34bc52010-05-22 12:01:14 +020080 return inode;
Sage Weil355da1e2009-10-06 11:31:08 -070081 inode->i_mode = parent->i_mode;
82 inode->i_uid = parent->i_uid;
83 inode->i_gid = parent->i_gid;
Yan, Zheng38c48b52015-01-14 13:46:04 +080084 inode->i_op = &ceph_snapdir_iops;
85 inode->i_fop = &ceph_snapdir_fops;
Sage Weilb377ff12009-11-11 15:22:37 -080086 ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */
87 ci->i_rbytes = 0;
Sage Weil355da1e2009-10-06 11:31:08 -070088 return inode;
89}
90
91const struct inode_operations ceph_file_iops = {
92 .permission = ceph_permission,
93 .setattr = ceph_setattr,
94 .getattr = ceph_getattr,
95 .setxattr = ceph_setxattr,
96 .getxattr = ceph_getxattr,
97 .listxattr = ceph_listxattr,
98 .removexattr = ceph_removexattr,
Guangliang Zhao7221fe42013-11-11 15:18:03 +080099 .get_acl = ceph_get_acl,
Sage Weil72466d02014-01-29 06:22:25 -0800100 .set_acl = ceph_set_acl,
Sage Weil355da1e2009-10-06 11:31:08 -0700101};
102
103
104/*
105 * We use a 'frag tree' to keep track of the MDS's directory fragments
106 * for a given inode (usually there is just a single fragment). We
107 * need to know when a child frag is delegated to a new MDS, or when
108 * it is flagged as replicated, so we can direct our requests
109 * accordingly.
110 */
111
112/*
113 * find/create a frag in the tree
114 */
115static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci,
116 u32 f)
117{
118 struct rb_node **p;
119 struct rb_node *parent = NULL;
120 struct ceph_inode_frag *frag;
121 int c;
122
123 p = &ci->i_fragtree.rb_node;
124 while (*p) {
125 parent = *p;
126 frag = rb_entry(parent, struct ceph_inode_frag, node);
127 c = ceph_frag_compare(f, frag->frag);
128 if (c < 0)
129 p = &(*p)->rb_left;
130 else if (c > 0)
131 p = &(*p)->rb_right;
132 else
133 return frag;
134 }
135
136 frag = kmalloc(sizeof(*frag), GFP_NOFS);
137 if (!frag) {
138 pr_err("__get_or_create_frag ENOMEM on %p %llx.%llx "
139 "frag %x\n", &ci->vfs_inode,
140 ceph_vinop(&ci->vfs_inode), f);
141 return ERR_PTR(-ENOMEM);
142 }
143 frag->frag = f;
144 frag->split_by = 0;
145 frag->mds = -1;
146 frag->ndist = 0;
147
148 rb_link_node(&frag->node, parent, p);
149 rb_insert_color(&frag->node, &ci->i_fragtree);
150
151 dout("get_or_create_frag added %llx.%llx frag %x\n",
152 ceph_vinop(&ci->vfs_inode), f);
153 return frag;
154}
155
156/*
157 * find a specific frag @f
158 */
159struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f)
160{
161 struct rb_node *n = ci->i_fragtree.rb_node;
162
163 while (n) {
164 struct ceph_inode_frag *frag =
165 rb_entry(n, struct ceph_inode_frag, node);
166 int c = ceph_frag_compare(f, frag->frag);
167 if (c < 0)
168 n = n->rb_left;
169 else if (c > 0)
170 n = n->rb_right;
171 else
172 return frag;
173 }
174 return NULL;
175}
176
177/*
178 * Choose frag containing the given value @v. If @pfrag is
179 * specified, copy the frag delegation info to the caller if
180 * it is present.
181 */
Yan, Zheng3e7fbe92014-04-18 16:00:30 +0800182static u32 __ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
183 struct ceph_inode_frag *pfrag, int *found)
Sage Weil355da1e2009-10-06 11:31:08 -0700184{
185 u32 t = ceph_frag_make(0, 0);
186 struct ceph_inode_frag *frag;
187 unsigned nway, i;
188 u32 n;
189
190 if (found)
191 *found = 0;
192
Sage Weil355da1e2009-10-06 11:31:08 -0700193 while (1) {
194 WARN_ON(!ceph_frag_contains_value(t, v));
195 frag = __ceph_find_frag(ci, t);
196 if (!frag)
197 break; /* t is a leaf */
198 if (frag->split_by == 0) {
199 if (pfrag)
200 memcpy(pfrag, frag, sizeof(*pfrag));
201 if (found)
202 *found = 1;
203 break;
204 }
205
206 /* choose child */
207 nway = 1 << frag->split_by;
208 dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t,
209 frag->split_by, nway);
210 for (i = 0; i < nway; i++) {
211 n = ceph_frag_make_child(t, frag->split_by, i);
212 if (ceph_frag_contains_value(n, v)) {
213 t = n;
214 break;
215 }
216 }
217 BUG_ON(i == nway);
218 }
219 dout("choose_frag(%x) = %x\n", v, t);
220
Sage Weil355da1e2009-10-06 11:31:08 -0700221 return t;
222}
223
Yan, Zheng3e7fbe92014-04-18 16:00:30 +0800224u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
225 struct ceph_inode_frag *pfrag, int *found)
226{
227 u32 ret;
228 mutex_lock(&ci->i_fragtree_mutex);
229 ret = __ceph_choose_frag(ci, v, pfrag, found);
230 mutex_unlock(&ci->i_fragtree_mutex);
231 return ret;
232}
233
Sage Weil355da1e2009-10-06 11:31:08 -0700234/*
235 * Process dirfrag (delegation) info from the mds. Include leaf
236 * fragment in tree ONLY if ndist > 0. Otherwise, only
237 * branches/splits are included in i_fragtree)
238 */
239static int ceph_fill_dirfrag(struct inode *inode,
240 struct ceph_mds_reply_dirfrag *dirinfo)
241{
242 struct ceph_inode_info *ci = ceph_inode(inode);
243 struct ceph_inode_frag *frag;
244 u32 id = le32_to_cpu(dirinfo->frag);
245 int mds = le32_to_cpu(dirinfo->auth);
246 int ndist = le32_to_cpu(dirinfo->ndist);
Yan, Zheng8d085032014-04-18 22:01:38 +0800247 int diri_auth = -1;
Sage Weil355da1e2009-10-06 11:31:08 -0700248 int i;
249 int err = 0;
250
Yan, Zheng8d085032014-04-18 22:01:38 +0800251 spin_lock(&ci->i_ceph_lock);
252 if (ci->i_auth_cap)
253 diri_auth = ci->i_auth_cap->mds;
254 spin_unlock(&ci->i_ceph_lock);
255
Sage Weil355da1e2009-10-06 11:31:08 -0700256 mutex_lock(&ci->i_fragtree_mutex);
Yan, Zheng8d085032014-04-18 22:01:38 +0800257 if (ndist == 0 && mds == diri_auth) {
Sage Weil355da1e2009-10-06 11:31:08 -0700258 /* no delegation info needed. */
259 frag = __ceph_find_frag(ci, id);
260 if (!frag)
261 goto out;
262 if (frag->split_by == 0) {
263 /* tree leaf, remove */
264 dout("fill_dirfrag removed %llx.%llx frag %x"
265 " (no ref)\n", ceph_vinop(inode), id);
266 rb_erase(&frag->node, &ci->i_fragtree);
267 kfree(frag);
268 } else {
269 /* tree branch, keep and clear */
270 dout("fill_dirfrag cleared %llx.%llx frag %x"
271 " referral\n", ceph_vinop(inode), id);
272 frag->mds = -1;
273 frag->ndist = 0;
274 }
275 goto out;
276 }
277
278
279 /* find/add this frag to store mds delegation info */
280 frag = __get_or_create_frag(ci, id);
281 if (IS_ERR(frag)) {
282 /* this is not the end of the world; we can continue
283 with bad/inaccurate delegation info */
284 pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n",
285 ceph_vinop(inode), le32_to_cpu(dirinfo->frag));
286 err = -ENOMEM;
287 goto out;
288 }
289
290 frag->mds = mds;
291 frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP);
292 for (i = 0; i < frag->ndist; i++)
293 frag->dist[i] = le32_to_cpu(dirinfo->dist[i]);
294 dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n",
295 ceph_vinop(inode), frag->frag, frag->ndist);
296
297out:
298 mutex_unlock(&ci->i_fragtree_mutex);
299 return err;
300}
301
Yan, Zheng3e7fbe92014-04-18 16:00:30 +0800302static int ceph_fill_fragtree(struct inode *inode,
303 struct ceph_frag_tree_head *fragtree,
304 struct ceph_mds_reply_dirfrag *dirinfo)
305{
306 struct ceph_inode_info *ci = ceph_inode(inode);
307 struct ceph_inode_frag *frag;
308 struct rb_node *rb_node;
309 int i;
310 u32 id, nsplits;
311 bool update = false;
312
313 mutex_lock(&ci->i_fragtree_mutex);
314 nsplits = le32_to_cpu(fragtree->nsplits);
315 if (nsplits) {
316 i = prandom_u32() % nsplits;
317 id = le32_to_cpu(fragtree->splits[i].frag);
318 if (!__ceph_find_frag(ci, id))
319 update = true;
320 } else if (!RB_EMPTY_ROOT(&ci->i_fragtree)) {
321 rb_node = rb_first(&ci->i_fragtree);
322 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
323 if (frag->frag != ceph_frag_make(0, 0) || rb_next(rb_node))
324 update = true;
325 }
326 if (!update && dirinfo) {
327 id = le32_to_cpu(dirinfo->frag);
328 if (id != __ceph_choose_frag(ci, id, NULL, NULL))
329 update = true;
330 }
331 if (!update)
332 goto out_unlock;
333
334 dout("fill_fragtree %llx.%llx\n", ceph_vinop(inode));
335 rb_node = rb_first(&ci->i_fragtree);
336 for (i = 0; i < nsplits; i++) {
337 id = le32_to_cpu(fragtree->splits[i].frag);
338 frag = NULL;
339 while (rb_node) {
340 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
341 if (ceph_frag_compare(frag->frag, id) >= 0) {
342 if (frag->frag != id)
343 frag = NULL;
344 else
345 rb_node = rb_next(rb_node);
346 break;
347 }
348 rb_node = rb_next(rb_node);
349 rb_erase(&frag->node, &ci->i_fragtree);
350 kfree(frag);
351 frag = NULL;
352 }
353 if (!frag) {
354 frag = __get_or_create_frag(ci, id);
355 if (IS_ERR(frag))
356 continue;
357 }
358 frag->split_by = le32_to_cpu(fragtree->splits[i].by);
359 dout(" frag %x split by %d\n", frag->frag, frag->split_by);
360 }
361 while (rb_node) {
362 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
363 rb_node = rb_next(rb_node);
364 rb_erase(&frag->node, &ci->i_fragtree);
365 kfree(frag);
366 }
367out_unlock:
368 mutex_unlock(&ci->i_fragtree_mutex);
369 return 0;
370}
Sage Weil355da1e2009-10-06 11:31:08 -0700371
372/*
373 * initialize a newly allocated inode.
374 */
375struct inode *ceph_alloc_inode(struct super_block *sb)
376{
377 struct ceph_inode_info *ci;
378 int i;
379
380 ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS);
381 if (!ci)
382 return NULL;
383
384 dout("alloc_inode %p\n", &ci->vfs_inode);
385
Sage Weilbe655592011-11-30 09:47:09 -0800386 spin_lock_init(&ci->i_ceph_lock);
387
Sage Weil355da1e2009-10-06 11:31:08 -0700388 ci->i_version = 0;
Yan, Zheng31c542a2014-11-14 21:41:55 +0800389 ci->i_inline_version = 0;
Sage Weil355da1e2009-10-06 11:31:08 -0700390 ci->i_time_warp_seq = 0;
391 ci->i_ceph_flags = 0;
Yan, Zhengfdd4e152015-06-16 20:48:56 +0800392 atomic64_set(&ci->i_ordered_count, 1);
393 atomic64_set(&ci->i_release_count, 1);
394 atomic64_set(&ci->i_complete_seq[0], 0);
395 atomic64_set(&ci->i_complete_seq[1], 0);
Sage Weil355da1e2009-10-06 11:31:08 -0700396 ci->i_symlink = NULL;
397
Sage Weil6c0f3af2010-11-16 11:14:34 -0800398 memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout));
Yan, Zheng5ea5c5e2016-02-14 18:06:41 +0800399 ci->i_pool_ns_len = 0;
Sage Weil6c0f3af2010-11-16 11:14:34 -0800400
Sage Weil355da1e2009-10-06 11:31:08 -0700401 ci->i_fragtree = RB_ROOT;
402 mutex_init(&ci->i_fragtree_mutex);
403
404 ci->i_xattrs.blob = NULL;
405 ci->i_xattrs.prealloc_blob = NULL;
406 ci->i_xattrs.dirty = false;
407 ci->i_xattrs.index = RB_ROOT;
408 ci->i_xattrs.count = 0;
409 ci->i_xattrs.names_size = 0;
410 ci->i_xattrs.vals_size = 0;
411 ci->i_xattrs.version = 0;
412 ci->i_xattrs.index_version = 0;
413
414 ci->i_caps = RB_ROOT;
415 ci->i_auth_cap = NULL;
416 ci->i_dirty_caps = 0;
417 ci->i_flushing_caps = 0;
418 INIT_LIST_HEAD(&ci->i_dirty_item);
419 INIT_LIST_HEAD(&ci->i_flushing_item);
Yan, Zhengf66fd9f2015-06-10 17:26:13 +0800420 ci->i_prealloc_cap_flush = NULL;
Yan, Zheng553adfd2015-06-09 15:48:57 +0800421 ci->i_cap_flush_tree = RB_ROOT;
Sage Weil355da1e2009-10-06 11:31:08 -0700422 init_waitqueue_head(&ci->i_cap_wq);
423 ci->i_hold_caps_min = 0;
424 ci->i_hold_caps_max = 0;
425 INIT_LIST_HEAD(&ci->i_cap_delay_list);
Sage Weil355da1e2009-10-06 11:31:08 -0700426 INIT_LIST_HEAD(&ci->i_cap_snaps);
427 ci->i_head_snapc = NULL;
428 ci->i_snap_caps = 0;
429
430 for (i = 0; i < CEPH_FILE_MODE_NUM; i++)
431 ci->i_nr_by_mode[i] = 0;
432
Yan, Zhengb0d7c222013-08-12 21:42:15 -0700433 mutex_init(&ci->i_truncate_mutex);
Sage Weil355da1e2009-10-06 11:31:08 -0700434 ci->i_truncate_seq = 0;
435 ci->i_truncate_size = 0;
436 ci->i_truncate_pending = 0;
437
438 ci->i_max_size = 0;
439 ci->i_reported_size = 0;
440 ci->i_wanted_max_size = 0;
441 ci->i_requested_max_size = 0;
442
443 ci->i_pin_ref = 0;
444 ci->i_rd_ref = 0;
445 ci->i_rdcache_ref = 0;
446 ci->i_wr_ref = 0;
Henry C Changd3d07202011-05-11 10:29:54 +0000447 ci->i_wb_ref = 0;
Sage Weil355da1e2009-10-06 11:31:08 -0700448 ci->i_wrbuffer_ref = 0;
449 ci->i_wrbuffer_ref_head = 0;
450 ci->i_shared_gen = 0;
451 ci->i_rdcache_gen = 0;
452 ci->i_rdcache_revoking = 0;
453
454 INIT_LIST_HEAD(&ci->i_unsafe_writes);
455 INIT_LIST_HEAD(&ci->i_unsafe_dirops);
Yan, Zheng68cd5b42015-10-27 18:36:06 +0800456 INIT_LIST_HEAD(&ci->i_unsafe_iops);
Sage Weil355da1e2009-10-06 11:31:08 -0700457 spin_lock_init(&ci->i_unsafe_lock);
458
459 ci->i_snap_realm = NULL;
460 INIT_LIST_HEAD(&ci->i_snap_realm_item);
461 INIT_LIST_HEAD(&ci->i_snap_flush_item);
462
Sage Weil3c6f6b72010-02-09 15:24:44 -0800463 INIT_WORK(&ci->i_wb_work, ceph_writeback_work);
464 INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work);
Sage Weil355da1e2009-10-06 11:31:08 -0700465
466 INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work);
467
Milosz Tanski99ccbd22013-08-21 17:29:54 -0400468 ceph_fscache_inode_init(ci);
469
Sage Weil355da1e2009-10-06 11:31:08 -0700470 return &ci->vfs_inode;
471}
472
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100473static void ceph_i_callback(struct rcu_head *head)
474{
475 struct inode *inode = container_of(head, struct inode, i_rcu);
476 struct ceph_inode_info *ci = ceph_inode(inode);
477
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100478 kmem_cache_free(ceph_inode_cachep, ci);
479}
480
Sage Weil355da1e2009-10-06 11:31:08 -0700481void ceph_destroy_inode(struct inode *inode)
482{
483 struct ceph_inode_info *ci = ceph_inode(inode);
484 struct ceph_inode_frag *frag;
485 struct rb_node *n;
486
487 dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode));
488
Milosz Tanski99ccbd22013-08-21 17:29:54 -0400489 ceph_fscache_unregister_inode_cookie(ci);
490
Sage Weil355da1e2009-10-06 11:31:08 -0700491 ceph_queue_caps_release(inode);
492
Sage Weil8b218b82010-03-09 12:59:08 -0800493 /*
494 * we may still have a snap_realm reference if there are stray
Yan, Zhengd9df2782014-04-18 09:57:11 +0800495 * caps in i_snap_caps.
Sage Weil8b218b82010-03-09 12:59:08 -0800496 */
497 if (ci->i_snap_realm) {
498 struct ceph_mds_client *mdsc =
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -0700499 ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc;
Sage Weil8b218b82010-03-09 12:59:08 -0800500 struct ceph_snap_realm *realm = ci->i_snap_realm;
501
502 dout(" dropping residual ref to snap realm %p\n", realm);
503 spin_lock(&realm->inodes_with_caps_lock);
504 list_del_init(&ci->i_snap_realm_item);
505 spin_unlock(&realm->inodes_with_caps_lock);
506 ceph_put_snap_realm(mdsc, realm);
507 }
508
Sage Weil355da1e2009-10-06 11:31:08 -0700509 kfree(ci->i_symlink);
510 while ((n = rb_first(&ci->i_fragtree)) != NULL) {
511 frag = rb_entry(n, struct ceph_inode_frag, node);
512 rb_erase(n, &ci->i_fragtree);
513 kfree(frag);
514 }
515
516 __ceph_destroy_xattrs(ci);
Sage Weilb6c1d5b2009-12-07 12:17:17 -0800517 if (ci->i_xattrs.blob)
518 ceph_buffer_put(ci->i_xattrs.blob);
519 if (ci->i_xattrs.prealloc_blob)
520 ceph_buffer_put(ci->i_xattrs.prealloc_blob);
Sage Weil355da1e2009-10-06 11:31:08 -0700521
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100522 call_rcu(&inode->i_rcu, ceph_i_callback);
Sage Weil355da1e2009-10-06 11:31:08 -0700523}
524
Yan, Zheng9f12bd12013-09-20 19:55:31 +0800525int ceph_drop_inode(struct inode *inode)
526{
527 /*
528 * Positve dentry and corresponding inode are always accompanied
529 * in MDS reply. So no need to keep inode in the cache after
530 * dropping all its aliases.
531 */
532 return 1;
533}
534
Sage Weil355da1e2009-10-06 11:31:08 -0700535/*
536 * Helpers to fill in size, ctime, mtime, and atime. We have to be
537 * careful because either the client or MDS may have more up to date
538 * info, depending on which capabilities are held, and whether
539 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime
540 * and size are monotonically increasing, except when utimes() or
541 * truncate() increments the corresponding _seq values.)
542 */
543int ceph_fill_file_size(struct inode *inode, int issued,
544 u32 truncate_seq, u64 truncate_size, u64 size)
545{
546 struct ceph_inode_info *ci = ceph_inode(inode);
547 int queue_trunc = 0;
548
549 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 ||
550 (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) {
551 dout("size %lld -> %llu\n", inode->i_size, size);
Yan, Zheng99c88e62015-12-30 11:32:46 +0800552 i_size_write(inode, size);
Sage Weil355da1e2009-10-06 11:31:08 -0700553 inode->i_blocks = (size + (1<<9) - 1) >> 9;
554 ci->i_reported_size = size;
555 if (truncate_seq != ci->i_truncate_seq) {
556 dout("truncate_seq %u -> %u\n",
557 ci->i_truncate_seq, truncate_seq);
558 ci->i_truncate_seq = truncate_seq;
Yan, Zhengb0d7c222013-08-12 21:42:15 -0700559
560 /* the MDS should have revoked these caps */
561 WARN_ON_ONCE(issued & (CEPH_CAP_FILE_EXCL |
562 CEPH_CAP_FILE_RD |
563 CEPH_CAP_FILE_WR |
564 CEPH_CAP_FILE_LAZYIO));
Yehuda Sadeh3d497d82010-02-09 11:08:40 -0800565 /*
566 * If we hold relevant caps, or in the case where we're
567 * not the only client referencing this file and we
568 * don't hold those caps, then we need to check whether
569 * the file is either opened or mmaped
570 */
Yan, Zhengb0d7c222013-08-12 21:42:15 -0700571 if ((issued & (CEPH_CAP_FILE_CACHE|
572 CEPH_CAP_FILE_BUFFER)) ||
Yehuda Sadeh3d497d82010-02-09 11:08:40 -0800573 mapping_mapped(inode->i_mapping) ||
574 __ceph_caps_file_wanted(ci)) {
Sage Weil355da1e2009-10-06 11:31:08 -0700575 ci->i_truncate_pending++;
576 queue_trunc = 1;
577 }
578 }
579 }
580 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 &&
581 ci->i_truncate_size != truncate_size) {
582 dout("truncate_size %lld -> %llu\n", ci->i_truncate_size,
583 truncate_size);
584 ci->i_truncate_size = truncate_size;
585 }
Milosz Tanski99ccbd22013-08-21 17:29:54 -0400586
587 if (queue_trunc)
588 ceph_fscache_invalidate(inode);
589
Sage Weil355da1e2009-10-06 11:31:08 -0700590 return queue_trunc;
591}
592
593void ceph_fill_file_time(struct inode *inode, int issued,
594 u64 time_warp_seq, struct timespec *ctime,
595 struct timespec *mtime, struct timespec *atime)
596{
597 struct ceph_inode_info *ci = ceph_inode(inode);
598 int warn = 0;
599
600 if (issued & (CEPH_CAP_FILE_EXCL|
601 CEPH_CAP_FILE_WR|
Sage Weild8672d62010-11-08 09:24:34 -0800602 CEPH_CAP_FILE_BUFFER|
603 CEPH_CAP_AUTH_EXCL|
604 CEPH_CAP_XATTR_EXCL)) {
Sage Weil355da1e2009-10-06 11:31:08 -0700605 if (timespec_compare(ctime, &inode->i_ctime) > 0) {
606 dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n",
607 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
608 ctime->tv_sec, ctime->tv_nsec);
609 inode->i_ctime = *ctime;
610 }
611 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) {
612 /* the MDS did a utimes() */
613 dout("mtime %ld.%09ld -> %ld.%09ld "
614 "tw %d -> %d\n",
615 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
616 mtime->tv_sec, mtime->tv_nsec,
617 ci->i_time_warp_seq, (int)time_warp_seq);
618
619 inode->i_mtime = *mtime;
620 inode->i_atime = *atime;
621 ci->i_time_warp_seq = time_warp_seq;
622 } else if (time_warp_seq == ci->i_time_warp_seq) {
623 /* nobody did utimes(); take the max */
624 if (timespec_compare(mtime, &inode->i_mtime) > 0) {
625 dout("mtime %ld.%09ld -> %ld.%09ld inc\n",
626 inode->i_mtime.tv_sec,
627 inode->i_mtime.tv_nsec,
628 mtime->tv_sec, mtime->tv_nsec);
629 inode->i_mtime = *mtime;
630 }
631 if (timespec_compare(atime, &inode->i_atime) > 0) {
632 dout("atime %ld.%09ld -> %ld.%09ld inc\n",
633 inode->i_atime.tv_sec,
634 inode->i_atime.tv_nsec,
635 atime->tv_sec, atime->tv_nsec);
636 inode->i_atime = *atime;
637 }
638 } else if (issued & CEPH_CAP_FILE_EXCL) {
639 /* we did a utimes(); ignore mds values */
640 } else {
641 warn = 1;
642 }
643 } else {
Sage Weild8672d62010-11-08 09:24:34 -0800644 /* we have no write|excl caps; whatever the MDS says is true */
Sage Weil355da1e2009-10-06 11:31:08 -0700645 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) {
646 inode->i_ctime = *ctime;
647 inode->i_mtime = *mtime;
648 inode->i_atime = *atime;
649 ci->i_time_warp_seq = time_warp_seq;
650 } else {
651 warn = 1;
652 }
653 }
654 if (warn) /* time_warp_seq shouldn't go backwards */
655 dout("%p mds time_warp_seq %llu < %u\n",
656 inode, time_warp_seq, ci->i_time_warp_seq);
657}
658
659/*
660 * Populate an inode based on info from mds. May be called on new or
661 * existing inodes.
662 */
Yan, Zheng01deead2014-11-14 21:56:29 +0800663static int fill_inode(struct inode *inode, struct page *locked_page,
Sage Weil355da1e2009-10-06 11:31:08 -0700664 struct ceph_mds_reply_info_in *iinfo,
665 struct ceph_mds_reply_dirfrag *dirinfo,
666 struct ceph_mds_session *session,
667 unsigned long ttl_from, int cap_fmode,
668 struct ceph_cap_reservation *caps_reservation)
669{
Yan, Zhengd9df2782014-04-18 09:57:11 +0800670 struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
Sage Weil355da1e2009-10-06 11:31:08 -0700671 struct ceph_mds_reply_inode *info = iinfo->in;
672 struct ceph_inode_info *ci = ceph_inode(inode);
Yan, Zhengf98a1282014-04-17 08:55:50 +0800673 int issued = 0, implemented, new_issued;
Sage Weil355da1e2009-10-06 11:31:08 -0700674 struct timespec mtime, atime, ctime;
Sage Weil355da1e2009-10-06 11:31:08 -0700675 struct ceph_buffer *xattr_blob = NULL;
Yan, Zhengd9df2782014-04-18 09:57:11 +0800676 struct ceph_cap *new_cap = NULL;
Sage Weil355da1e2009-10-06 11:31:08 -0700677 int err = 0;
Yan, Zhengd9df2782014-04-18 09:57:11 +0800678 bool wake = false;
Yan, Zhengf98a1282014-04-17 08:55:50 +0800679 bool queue_trunc = false;
680 bool new_version = false;
Yan, Zheng31c542a2014-11-14 21:41:55 +0800681 bool fill_inline = false;
Sage Weil355da1e2009-10-06 11:31:08 -0700682
683 dout("fill_inode %p ino %llx.%llx v %llu had %llu\n",
684 inode, ceph_vinop(inode), le64_to_cpu(info->version),
685 ci->i_version);
686
Yan, Zhengd9df2782014-04-18 09:57:11 +0800687 /* prealloc new cap struct */
688 if (info->cap.caps && ceph_snap(inode) == CEPH_NOSNAP)
689 new_cap = ceph_get_cap(mdsc, caps_reservation);
690
Sage Weil355da1e2009-10-06 11:31:08 -0700691 /*
692 * prealloc xattr data, if it looks like we'll need it. only
693 * if len > 4 (meaning there are actually xattrs; the first 4
694 * bytes are the xattr count).
695 */
696 if (iinfo->xattr_len > 4) {
Sage Weilb6c1d5b2009-12-07 12:17:17 -0800697 xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS);
Sage Weil355da1e2009-10-06 11:31:08 -0700698 if (!xattr_blob)
699 pr_err("fill_inode ENOMEM xattr blob %d bytes\n",
700 iinfo->xattr_len);
701 }
702
Sage Weilbe655592011-11-30 09:47:09 -0800703 spin_lock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -0700704
705 /*
706 * provided version will be odd if inode value is projected,
Sage Weil8bd59e02010-11-08 09:23:12 -0800707 * even if stable. skip the update if we have newer stable
708 * info (ours>=theirs, e.g. due to racing mds replies), unless
709 * we are getting projected (unstable) info (in which case the
710 * version is odd, and we want ours>theirs).
711 * us them
712 * 2 2 skip
713 * 3 2 skip
714 * 3 3 update
Sage Weil355da1e2009-10-06 11:31:08 -0700715 */
Yan, Zhengf98a1282014-04-17 08:55:50 +0800716 if (ci->i_version == 0 ||
717 ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
718 le64_to_cpu(info->version) > (ci->i_version & ~1)))
719 new_version = true;
720
Sage Weil355da1e2009-10-06 11:31:08 -0700721 issued = __ceph_caps_issued(ci, &implemented);
722 issued |= implemented | __ceph_caps_dirty(ci);
Yan, Zhengf98a1282014-04-17 08:55:50 +0800723 new_issued = ~issued & le32_to_cpu(info->cap.caps);
Sage Weil355da1e2009-10-06 11:31:08 -0700724
725 /* update inode */
726 ci->i_version = le64_to_cpu(info->version);
727 inode->i_version++;
728 inode->i_rdev = le32_to_cpu(info->rdev);
Yan, Zhengf98a1282014-04-17 08:55:50 +0800729 inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1;
Sage Weil355da1e2009-10-06 11:31:08 -0700730
Yan, Zhengf98a1282014-04-17 08:55:50 +0800731 if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) &&
732 (issued & CEPH_CAP_AUTH_EXCL) == 0) {
Sage Weil355da1e2009-10-06 11:31:08 -0700733 inode->i_mode = le32_to_cpu(info->mode);
Eric W. Biedermanab871b92013-01-31 03:40:12 -0800734 inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid));
735 inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid));
Sage Weil355da1e2009-10-06 11:31:08 -0700736 dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode,
Eric W. Biedermanbd2bae62013-01-31 04:05:39 -0800737 from_kuid(&init_user_ns, inode->i_uid),
738 from_kgid(&init_user_ns, inode->i_gid));
Sage Weil355da1e2009-10-06 11:31:08 -0700739 }
740
Yan, Zhengf98a1282014-04-17 08:55:50 +0800741 if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) &&
742 (issued & CEPH_CAP_LINK_EXCL) == 0)
Miklos Szeredibfe86842011-10-28 14:13:29 +0200743 set_nlink(inode, le32_to_cpu(info->nlink));
Sage Weil355da1e2009-10-06 11:31:08 -0700744
Yan, Zhengf98a1282014-04-17 08:55:50 +0800745 if (new_version || (new_issued & CEPH_CAP_ANY_RD)) {
746 /* be careful with mtime, atime, size */
747 ceph_decode_timespec(&atime, &info->atime);
748 ceph_decode_timespec(&mtime, &info->mtime);
749 ceph_decode_timespec(&ctime, &info->ctime);
750 ceph_fill_file_time(inode, issued,
751 le32_to_cpu(info->time_warp_seq),
752 &ctime, &mtime, &atime);
753 }
Sage Weil355da1e2009-10-06 11:31:08 -0700754
Yan, Zhengf98a1282014-04-17 08:55:50 +0800755 if (new_version ||
756 (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) {
Yan, Zheng10183a62015-04-27 15:33:28 +0800757 if (ci->i_layout.fl_pg_pool != info->layout.fl_pg_pool)
758 ci->i_ceph_flags &= ~CEPH_I_POOL_PERM;
Yan, Zhengf98a1282014-04-17 08:55:50 +0800759 ci->i_layout = info->layout;
Yan, Zheng5ea5c5e2016-02-14 18:06:41 +0800760 ci->i_pool_ns_len = iinfo->pool_ns_len;
Yan, Zheng10183a62015-04-27 15:33:28 +0800761
Yan, Zhengf98a1282014-04-17 08:55:50 +0800762 queue_trunc = ceph_fill_file_size(inode, issued,
763 le32_to_cpu(info->truncate_seq),
764 le64_to_cpu(info->truncate_size),
765 le64_to_cpu(info->size));
766 /* only update max_size on auth cap */
767 if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
768 ci->i_max_size != le64_to_cpu(info->max_size)) {
769 dout("max_size %lld -> %llu\n", ci->i_max_size,
770 le64_to_cpu(info->max_size));
771 ci->i_max_size = le64_to_cpu(info->max_size);
772 }
773 }
Sage Weil355da1e2009-10-06 11:31:08 -0700774
775 /* xattrs */
776 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
Yan, Zheng508b32d2014-09-16 21:46:17 +0800777 if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) &&
Sage Weil355da1e2009-10-06 11:31:08 -0700778 le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) {
779 if (ci->i_xattrs.blob)
780 ceph_buffer_put(ci->i_xattrs.blob);
781 ci->i_xattrs.blob = xattr_blob;
782 if (xattr_blob)
783 memcpy(ci->i_xattrs.blob->vec.iov_base,
784 iinfo->xattr_data, iinfo->xattr_len);
785 ci->i_xattrs.version = le64_to_cpu(info->xattr_version);
Guangliang Zhao7221fe42013-11-11 15:18:03 +0800786 ceph_forget_all_cached_acls(inode);
Sage Weila6424e42010-04-29 09:28:11 -0700787 xattr_blob = NULL;
Sage Weil355da1e2009-10-06 11:31:08 -0700788 }
789
790 inode->i_mapping->a_ops = &ceph_aops;
Sage Weil355da1e2009-10-06 11:31:08 -0700791
792 switch (inode->i_mode & S_IFMT) {
793 case S_IFIFO:
794 case S_IFBLK:
795 case S_IFCHR:
796 case S_IFSOCK:
797 init_special_inode(inode, inode->i_mode, inode->i_rdev);
798 inode->i_op = &ceph_file_iops;
799 break;
800 case S_IFREG:
801 inode->i_op = &ceph_file_iops;
802 inode->i_fop = &ceph_file_fops;
803 break;
804 case S_IFLNK:
805 inode->i_op = &ceph_symlink_iops;
806 if (!ci->i_symlink) {
Xi Wang810339ec2012-02-03 09:55:36 -0500807 u32 symlen = iinfo->symlink_len;
Sage Weil355da1e2009-10-06 11:31:08 -0700808 char *sym;
809
Sage Weilbe655592011-11-30 09:47:09 -0800810 spin_unlock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -0700811
Xi Wang810339ec2012-02-03 09:55:36 -0500812 err = -EINVAL;
Yan, Zheng99c88e62015-12-30 11:32:46 +0800813 if (WARN_ON(symlen != i_size_read(inode)))
Xi Wang810339ec2012-02-03 09:55:36 -0500814 goto out;
815
Sage Weil355da1e2009-10-06 11:31:08 -0700816 err = -ENOMEM;
Xi Wang810339ec2012-02-03 09:55:36 -0500817 sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS);
Sage Weil355da1e2009-10-06 11:31:08 -0700818 if (!sym)
819 goto out;
Sage Weil355da1e2009-10-06 11:31:08 -0700820
Sage Weilbe655592011-11-30 09:47:09 -0800821 spin_lock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -0700822 if (!ci->i_symlink)
823 ci->i_symlink = sym;
824 else
825 kfree(sym); /* lost a race */
826 }
Al Viroac194dc2015-05-02 10:50:05 -0400827 inode->i_link = ci->i_symlink;
Sage Weil355da1e2009-10-06 11:31:08 -0700828 break;
829 case S_IFDIR:
830 inode->i_op = &ceph_dir_iops;
831 inode->i_fop = &ceph_dir_fops;
832
Sage Weil14303d22010-12-14 17:37:52 -0800833 ci->i_dir_layout = iinfo->dir_layout;
834
Sage Weil355da1e2009-10-06 11:31:08 -0700835 ci->i_files = le64_to_cpu(info->files);
836 ci->i_subdirs = le64_to_cpu(info->subdirs);
837 ci->i_rbytes = le64_to_cpu(info->rbytes);
838 ci->i_rfiles = le64_to_cpu(info->rfiles);
839 ci->i_rsubdirs = le64_to_cpu(info->rsubdirs);
840 ceph_decode_timespec(&ci->i_rctime, &info->rctime);
Sage Weil355da1e2009-10-06 11:31:08 -0700841 break;
842 default:
843 pr_err("fill_inode %llx.%llx BAD mode 0%o\n",
844 ceph_vinop(inode), inode->i_mode);
845 }
846
Sage Weil355da1e2009-10-06 11:31:08 -0700847 /* were we issued a capability? */
848 if (info->cap.caps) {
849 if (ceph_snap(inode) == CEPH_NOSNAP) {
Yan, Zheng2f92b3d2015-01-19 13:12:24 +0800850 unsigned caps = le32_to_cpu(info->cap.caps);
Sage Weil355da1e2009-10-06 11:31:08 -0700851 ceph_add_cap(inode, session,
852 le64_to_cpu(info->cap.cap_id),
Yan, Zheng2f92b3d2015-01-19 13:12:24 +0800853 cap_fmode, caps,
Sage Weil355da1e2009-10-06 11:31:08 -0700854 le32_to_cpu(info->cap.wanted),
855 le32_to_cpu(info->cap.seq),
856 le32_to_cpu(info->cap.mseq),
857 le64_to_cpu(info->cap.realm),
Yan, Zhengd9df2782014-04-18 09:57:11 +0800858 info->cap.flags, &new_cap);
Yan, Zheng2f92b3d2015-01-19 13:12:24 +0800859
860 /* set dir completion flag? */
861 if (S_ISDIR(inode->i_mode) &&
862 ci->i_files == 0 && ci->i_subdirs == 0 &&
863 (caps & CEPH_CAP_FILE_SHARED) &&
864 (issued & CEPH_CAP_FILE_EXCL) == 0 &&
865 !__ceph_dir_is_complete(ci)) {
866 dout(" marking %p complete (empty)\n", inode);
Yan, Zhengfdd4e152015-06-16 20:48:56 +0800867 i_size_write(inode, 0);
Yan, Zheng2f92b3d2015-01-19 13:12:24 +0800868 __ceph_dir_set_complete(ci,
Yan, Zhengfdd4e152015-06-16 20:48:56 +0800869 atomic64_read(&ci->i_release_count),
870 atomic64_read(&ci->i_ordered_count));
Yan, Zheng2f92b3d2015-01-19 13:12:24 +0800871 }
872
Yan, Zhengd9df2782014-04-18 09:57:11 +0800873 wake = true;
Sage Weil355da1e2009-10-06 11:31:08 -0700874 } else {
Sage Weil355da1e2009-10-06 11:31:08 -0700875 dout(" %p got snap_caps %s\n", inode,
876 ceph_cap_string(le32_to_cpu(info->cap.caps)));
877 ci->i_snap_caps |= le32_to_cpu(info->cap.caps);
878 if (cap_fmode >= 0)
879 __ceph_get_fmode(ci, cap_fmode);
Sage Weil355da1e2009-10-06 11:31:08 -0700880 }
Sage Weil04d000e2010-05-07 11:26:34 -0700881 } else if (cap_fmode >= 0) {
Fabian Frederickf3ae1b92014-06-06 14:35:37 -0700882 pr_warn("mds issued no caps on %llx.%llx\n",
Sage Weil04d000e2010-05-07 11:26:34 -0700883 ceph_vinop(inode));
884 __ceph_get_fmode(ci, cap_fmode);
Sage Weil355da1e2009-10-06 11:31:08 -0700885 }
Yan, Zheng31c542a2014-11-14 21:41:55 +0800886
887 if (iinfo->inline_version > 0 &&
888 iinfo->inline_version >= ci->i_inline_version) {
889 int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO;
890 ci->i_inline_version = iinfo->inline_version;
891 if (ci->i_inline_version != CEPH_INLINE_NONE &&
Yan, Zheng01deead2014-11-14 21:56:29 +0800892 (locked_page ||
893 (le32_to_cpu(info->cap.caps) & cache_caps)))
Yan, Zheng31c542a2014-11-14 21:41:55 +0800894 fill_inline = true;
895 }
896
Sage Weil355da1e2009-10-06 11:31:08 -0700897 spin_unlock(&ci->i_ceph_lock);
898
Yan, Zheng31c542a2014-11-14 21:41:55 +0800899 if (fill_inline)
Yan, Zheng01deead2014-11-14 21:56:29 +0800900 ceph_fill_inline_data(inode, locked_page,
Yan, Zheng31c542a2014-11-14 21:41:55 +0800901 iinfo->inline_data, iinfo->inline_len);
902
Yan, Zhengd9df2782014-04-18 09:57:11 +0800903 if (wake)
904 wake_up_all(&ci->i_cap_wq);
905
Sage Weil355da1e2009-10-06 11:31:08 -0700906 /* queue truncate if we saw i_size decrease */
907 if (queue_trunc)
908 ceph_queue_vmtruncate(inode);
909
910 /* populate frag tree */
Yan, Zheng3e7fbe92014-04-18 16:00:30 +0800911 if (S_ISDIR(inode->i_mode))
912 ceph_fill_fragtree(inode, &info->fragtree, dirinfo);
Sage Weil355da1e2009-10-06 11:31:08 -0700913
914 /* update delegation info? */
915 if (dirinfo)
916 ceph_fill_dirfrag(inode, dirinfo);
917
918 err = 0;
Sage Weil355da1e2009-10-06 11:31:08 -0700919out:
Yan, Zhengd9df2782014-04-18 09:57:11 +0800920 if (new_cap)
921 ceph_put_cap(mdsc, new_cap);
Sage Weilb6c1d5b2009-12-07 12:17:17 -0800922 if (xattr_blob)
923 ceph_buffer_put(xattr_blob);
Sage Weil355da1e2009-10-06 11:31:08 -0700924 return err;
925}
926
927/*
928 * caller should hold session s_mutex.
929 */
930static void update_dentry_lease(struct dentry *dentry,
931 struct ceph_mds_reply_lease *lease,
932 struct ceph_mds_session *session,
933 unsigned long from_time)
934{
935 struct ceph_dentry_info *di = ceph_dentry(dentry);
936 long unsigned duration = le32_to_cpu(lease->duration_ms);
937 long unsigned ttl = from_time + (duration * HZ) / 1000;
938 long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000;
939 struct inode *dir;
940
941 /* only track leases on regular dentries */
942 if (dentry->d_op != &ceph_dentry_ops)
943 return;
944
945 spin_lock(&dentry->d_lock);
Sage Weil2f90b852011-07-26 11:28:25 -0700946 dout("update_dentry_lease %p duration %lu ms ttl %lu\n",
947 dentry, duration, ttl);
Sage Weil355da1e2009-10-06 11:31:08 -0700948
949 /* make lease_rdcache_gen match directory */
David Howells2b0143b2015-03-17 22:25:59 +0000950 dir = d_inode(dentry->d_parent);
Sage Weil355da1e2009-10-06 11:31:08 -0700951 di->lease_shared_gen = ceph_inode(dir)->i_shared_gen;
952
Sage Weil2f90b852011-07-26 11:28:25 -0700953 if (duration == 0)
Sage Weil355da1e2009-10-06 11:31:08 -0700954 goto out_unlock;
955
956 if (di->lease_gen == session->s_cap_gen &&
957 time_before(ttl, dentry->d_time))
958 goto out_unlock; /* we already have a newer lease. */
959
960 if (di->lease_session && di->lease_session != session)
961 goto out_unlock;
962
963 ceph_dentry_lru_touch(dentry);
964
965 if (!di->lease_session)
966 di->lease_session = ceph_get_mds_session(session);
967 di->lease_gen = session->s_cap_gen;
968 di->lease_seq = le32_to_cpu(lease->seq);
969 di->lease_renew_after = half_ttl;
970 di->lease_renew_from = 0;
971 dentry->d_time = ttl;
972out_unlock:
973 spin_unlock(&dentry->d_lock);
974 return;
975}
976
977/*
Sage Weil1cd39352010-05-03 22:08:02 -0700978 * splice a dentry to an inode.
979 * caller must hold directory i_mutex for this to be safe.
980 *
981 * we will only rehash the resulting dentry if @prehash is
982 * true; @prehash will be set to false (for the benefit of
983 * the caller) if we fail.
984 */
985static struct dentry *splice_dentry(struct dentry *dn, struct inode *in,
Yan, Zheng0a8a70f2014-04-14 13:13:02 +0800986 bool *prehash)
Sage Weil1cd39352010-05-03 22:08:02 -0700987{
988 struct dentry *realdn;
989
David Howells2b0143b2015-03-17 22:25:59 +0000990 BUG_ON(d_inode(dn));
Sage Weil1cd39352010-05-03 22:08:02 -0700991
992 /* dn must be unhashed */
993 if (!d_unhashed(dn))
994 d_drop(dn);
Al Viro41d28bc2014-10-12 22:24:21 -0400995 realdn = d_splice_alias(in, dn);
Sage Weil1cd39352010-05-03 22:08:02 -0700996 if (IS_ERR(realdn)) {
Sage Weild69ed052010-06-21 10:38:14 -0700997 pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n",
998 PTR_ERR(realdn), dn, in, ceph_vinop(in));
Sage Weil1cd39352010-05-03 22:08:02 -0700999 if (prehash)
1000 *prehash = false; /* don't rehash on error */
1001 dn = realdn; /* note realdn contains the error */
1002 goto out;
1003 } else if (realdn) {
1004 dout("dn %p (%d) spliced with %p (%d) "
1005 "inode %p ino %llx.%llx\n",
Al Viro84d08fa2013-07-05 18:59:33 +04001006 dn, d_count(dn),
1007 realdn, d_count(realdn),
David Howells2b0143b2015-03-17 22:25:59 +00001008 d_inode(realdn), ceph_vinop(d_inode(realdn)));
Sage Weil1cd39352010-05-03 22:08:02 -07001009 dput(dn);
1010 dn = realdn;
1011 } else {
1012 BUG_ON(!ceph_dentry(dn));
1013 dout("dn %p attached to %p ino %llx.%llx\n",
David Howells2b0143b2015-03-17 22:25:59 +00001014 dn, d_inode(dn), ceph_vinop(d_inode(dn)));
Sage Weil1cd39352010-05-03 22:08:02 -07001015 }
1016 if ((!prehash || *prehash) && d_unhashed(dn))
1017 d_rehash(dn);
Sage Weil1cd39352010-05-03 22:08:02 -07001018out:
1019 return dn;
1020}
1021
1022/*
Sage Weil355da1e2009-10-06 11:31:08 -07001023 * Incorporate results into the local cache. This is either just
1024 * one inode, or a directory, dentry, and possibly linked-to inode (e.g.,
1025 * after a lookup).
1026 *
1027 * A reply may contain
1028 * a directory inode along with a dentry.
1029 * and/or a target inode
1030 *
1031 * Called with snap_rwsem (read).
1032 */
1033int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req,
1034 struct ceph_mds_session *session)
1035{
1036 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1037 struct inode *in = NULL;
Sage Weil355da1e2009-10-06 11:31:08 -07001038 struct ceph_vino vino;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07001039 struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
Sage Weil355da1e2009-10-06 11:31:08 -07001040 int err = 0;
1041
1042 dout("fill_trace %p is_dentry %d is_target %d\n", req,
1043 rinfo->head->is_dentry, rinfo->head->is_target);
1044
1045#if 0
1046 /*
1047 * Debugging hook:
1048 *
1049 * If we resend completed ops to a recovering mds, we get no
1050 * trace. Since that is very rare, pretend this is the case
1051 * to ensure the 'no trace' handlers in the callers behave.
1052 *
1053 * Fill in inodes unconditionally to avoid breaking cap
1054 * invariants.
1055 */
1056 if (rinfo->head->op & CEPH_MDS_OP_WRITE) {
1057 pr_info("fill_trace faking empty trace on %lld %s\n",
1058 req->r_tid, ceph_mds_op_name(rinfo->head->op));
1059 if (rinfo->head->is_dentry) {
1060 rinfo->head->is_dentry = 0;
1061 err = fill_inode(req->r_locked_dir,
1062 &rinfo->diri, rinfo->dirfrag,
1063 session, req->r_request_started, -1);
1064 }
1065 if (rinfo->head->is_target) {
1066 rinfo->head->is_target = 0;
1067 ininfo = rinfo->targeti.in;
1068 vino.ino = le64_to_cpu(ininfo->ino);
1069 vino.snap = le64_to_cpu(ininfo->snapid);
1070 in = ceph_get_inode(sb, vino);
1071 err = fill_inode(in, &rinfo->targeti, NULL,
1072 session, req->r_request_started,
1073 req->r_fmode);
1074 iput(in);
1075 }
1076 }
1077#endif
1078
1079 if (!rinfo->head->is_target && !rinfo->head->is_dentry) {
1080 dout("fill_trace reply is empty!\n");
Sage Weil167c9e32010-05-14 10:02:57 -07001081 if (rinfo->head->result == 0 && req->r_locked_dir)
1082 ceph_invalidate_dir_request(req);
Sage Weil355da1e2009-10-06 11:31:08 -07001083 return 0;
1084 }
1085
1086 if (rinfo->head->is_dentry) {
Sage Weil5b1daec2010-01-25 11:33:08 -08001087 struct inode *dir = req->r_locked_dir;
1088
Sage Weil6c5e50f2012-08-21 15:55:25 -07001089 if (dir) {
Yan, Zheng01deead2014-11-14 21:56:29 +08001090 err = fill_inode(dir, NULL,
1091 &rinfo->diri, rinfo->dirfrag,
Sage Weil6c5e50f2012-08-21 15:55:25 -07001092 session, req->r_request_started, -1,
1093 &req->r_caps_reservation);
1094 if (err < 0)
Yan, Zheng19913b42014-03-06 16:40:32 +08001095 goto done;
Sage Weil6c5e50f2012-08-21 15:55:25 -07001096 } else {
1097 WARN_ON_ONCE(1);
1098 }
Yan, Zheng19913b42014-03-06 16:40:32 +08001099
1100 if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME) {
1101 struct qstr dname;
1102 struct dentry *dn, *parent;
1103
1104 BUG_ON(!rinfo->head->is_target);
1105 BUG_ON(req->r_dentry);
1106
1107 parent = d_find_any_alias(dir);
1108 BUG_ON(!parent);
1109
1110 dname.name = rinfo->dname;
1111 dname.len = rinfo->dname_len;
1112 dname.hash = full_name_hash(dname.name, dname.len);
1113 vino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1114 vino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1115retry_lookup:
1116 dn = d_lookup(parent, &dname);
1117 dout("d_lookup on parent=%p name=%.*s got %p\n",
1118 parent, dname.len, dname.name, dn);
1119
1120 if (!dn) {
1121 dn = d_alloc(parent, &dname);
1122 dout("d_alloc %p '%.*s' = %p\n", parent,
1123 dname.len, dname.name, dn);
1124 if (dn == NULL) {
1125 dput(parent);
1126 err = -ENOMEM;
1127 goto done;
1128 }
1129 err = ceph_init_dentry(dn);
1130 if (err < 0) {
1131 dput(dn);
1132 dput(parent);
1133 goto done;
1134 }
David Howells2b0143b2015-03-17 22:25:59 +00001135 } else if (d_really_is_positive(dn) &&
1136 (ceph_ino(d_inode(dn)) != vino.ino ||
1137 ceph_snap(d_inode(dn)) != vino.snap)) {
Yan, Zheng19913b42014-03-06 16:40:32 +08001138 dout(" dn %p points to wrong inode %p\n",
David Howells2b0143b2015-03-17 22:25:59 +00001139 dn, d_inode(dn));
Yan, Zheng19913b42014-03-06 16:40:32 +08001140 d_delete(dn);
1141 dput(dn);
1142 goto retry_lookup;
1143 }
1144
1145 req->r_dentry = dn;
1146 dput(parent);
1147 }
Sage Weil5b1daec2010-01-25 11:33:08 -08001148 }
1149
Yan, Zheng86b58d12013-12-05 12:38:59 +08001150 if (rinfo->head->is_target) {
1151 vino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1152 vino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1153
1154 in = ceph_get_inode(sb, vino);
1155 if (IS_ERR(in)) {
1156 err = PTR_ERR(in);
1157 goto done;
1158 }
1159 req->r_target_inode = in;
1160
Yan, Zheng01deead2014-11-14 21:56:29 +08001161 err = fill_inode(in, req->r_locked_page, &rinfo->targeti, NULL,
Yan, Zheng86b58d12013-12-05 12:38:59 +08001162 session, req->r_request_started,
Yan, Zheng48193012014-04-01 20:34:18 +08001163 (!req->r_aborted && rinfo->head->result == 0) ?
Yan, Zheng86b58d12013-12-05 12:38:59 +08001164 req->r_fmode : -1,
1165 &req->r_caps_reservation);
1166 if (err < 0) {
1167 pr_err("fill_inode badness %p %llx.%llx\n",
1168 in, ceph_vinop(in));
1169 goto done;
1170 }
1171 }
1172
Sage Weil9358c6d2010-03-30 13:54:41 -07001173 /*
1174 * ignore null lease/binding on snapdir ENOENT, or else we
1175 * will have trouble splicing in the virtual snapdir later
1176 */
1177 if (rinfo->head->is_dentry && !req->r_aborted &&
Sage Weil6c5e50f2012-08-21 15:55:25 -07001178 req->r_locked_dir &&
Sage Weil9358c6d2010-03-30 13:54:41 -07001179 (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name,
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07001180 fsc->mount_options->snapdir_name,
Sage Weil9358c6d2010-03-30 13:54:41 -07001181 req->r_dentry->d_name.len))) {
Sage Weil355da1e2009-10-06 11:31:08 -07001182 /*
1183 * lookup link rename : null -> possibly existing inode
1184 * mknod symlink mkdir : null -> new inode
1185 * unlink : linked -> null
1186 */
1187 struct inode *dir = req->r_locked_dir;
1188 struct dentry *dn = req->r_dentry;
1189 bool have_dir_cap, have_lease;
1190
1191 BUG_ON(!dn);
1192 BUG_ON(!dir);
David Howells2b0143b2015-03-17 22:25:59 +00001193 BUG_ON(d_inode(dn->d_parent) != dir);
Sage Weil355da1e2009-10-06 11:31:08 -07001194 BUG_ON(ceph_ino(dir) !=
1195 le64_to_cpu(rinfo->diri.in->ino));
1196 BUG_ON(ceph_snap(dir) !=
1197 le64_to_cpu(rinfo->diri.in->snapid));
1198
Sage Weil355da1e2009-10-06 11:31:08 -07001199 /* do we have a lease on the whole dir? */
1200 have_dir_cap =
1201 (le32_to_cpu(rinfo->diri.in->cap.caps) &
1202 CEPH_CAP_FILE_SHARED);
1203
1204 /* do we have a dn lease? */
1205 have_lease = have_dir_cap ||
Sage Weil2f90b852011-07-26 11:28:25 -07001206 le32_to_cpu(rinfo->dlease->duration_ms);
Sage Weil355da1e2009-10-06 11:31:08 -07001207 if (!have_lease)
1208 dout("fill_trace no dentry lease or dir cap\n");
1209
1210 /* rename? */
1211 if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) {
Yan, Zheng0a8a70f2014-04-14 13:13:02 +08001212 struct inode *olddir = req->r_old_dentry_dir;
1213 BUG_ON(!olddir);
1214
Al Viroa4555892014-10-21 20:11:25 -04001215 dout(" src %p '%pd' dst %p '%pd'\n",
Sage Weil355da1e2009-10-06 11:31:08 -07001216 req->r_old_dentry,
Al Viroa4555892014-10-21 20:11:25 -04001217 req->r_old_dentry,
1218 dn, dn);
Sage Weil355da1e2009-10-06 11:31:08 -07001219 dout("fill_trace doing d_move %p -> %p\n",
1220 req->r_old_dentry, dn);
Sage Weilc10f5e12010-04-16 12:56:11 -07001221
Yan, Zhengfdd4e152015-06-16 20:48:56 +08001222 /* d_move screws up sibling dentries' offsets */
1223 ceph_dir_clear_ordered(dir);
1224 ceph_dir_clear_ordered(olddir);
1225
Sage Weil355da1e2009-10-06 11:31:08 -07001226 d_move(req->r_old_dentry, dn);
Al Viroa4555892014-10-21 20:11:25 -04001227 dout(" src %p '%pd' dst %p '%pd'\n",
Sage Weil355da1e2009-10-06 11:31:08 -07001228 req->r_old_dentry,
Al Viroa4555892014-10-21 20:11:25 -04001229 req->r_old_dentry,
1230 dn, dn);
Sage Weil81a6cf22010-05-14 09:35:38 -07001231
Sage Weilc4a29f22009-12-21 11:42:18 -08001232 /* ensure target dentry is invalidated, despite
1233 rehashing bug in vfs_rename_dir */
Sage Weil81a6cf22010-05-14 09:35:38 -07001234 ceph_invalidate_dentry_lease(dn);
1235
Milosz Tanski99ccbd22013-08-21 17:29:54 -04001236 dout("dn %p gets new offset %lld\n", req->r_old_dentry,
Sage Weil1cd39352010-05-03 22:08:02 -07001237 ceph_dentry(req->r_old_dentry)->offset);
Sage Weil81a6cf22010-05-14 09:35:38 -07001238
Sage Weil355da1e2009-10-06 11:31:08 -07001239 dn = req->r_old_dentry; /* use old_dentry */
Sage Weil355da1e2009-10-06 11:31:08 -07001240 }
1241
1242 /* null dentry? */
1243 if (!rinfo->head->is_target) {
1244 dout("fill_trace null dentry\n");
David Howells2b0143b2015-03-17 22:25:59 +00001245 if (d_really_is_positive(dn)) {
Yan, Zheng70db4f32014-10-21 18:09:56 -07001246 ceph_dir_clear_ordered(dir);
Sage Weil355da1e2009-10-06 11:31:08 -07001247 dout("d_delete %p\n", dn);
1248 d_delete(dn);
1249 } else {
1250 dout("d_instantiate %p NULL\n", dn);
1251 d_instantiate(dn, NULL);
1252 if (have_lease && d_unhashed(dn))
1253 d_rehash(dn);
1254 update_dentry_lease(dn, rinfo->dlease,
1255 session,
1256 req->r_request_started);
1257 }
1258 goto done;
1259 }
1260
1261 /* attach proper inode */
David Howells2b0143b2015-03-17 22:25:59 +00001262 if (d_really_is_negative(dn)) {
Yan, Zheng70db4f32014-10-21 18:09:56 -07001263 ceph_dir_clear_ordered(dir);
Yan, Zheng86b58d12013-12-05 12:38:59 +08001264 ihold(in);
Yan, Zheng0a8a70f2014-04-14 13:13:02 +08001265 dn = splice_dentry(dn, in, &have_lease);
Sage Weil355da1e2009-10-06 11:31:08 -07001266 if (IS_ERR(dn)) {
1267 err = PTR_ERR(dn);
1268 goto done;
1269 }
1270 req->r_dentry = dn; /* may have spliced */
David Howells2b0143b2015-03-17 22:25:59 +00001271 } else if (d_really_is_positive(dn) && d_inode(dn) != in) {
Sage Weil355da1e2009-10-06 11:31:08 -07001272 dout(" %p links to %p %llx.%llx, not %llx.%llx\n",
David Howells2b0143b2015-03-17 22:25:59 +00001273 dn, d_inode(dn), ceph_vinop(d_inode(dn)),
Yan, Zheng86b58d12013-12-05 12:38:59 +08001274 ceph_vinop(in));
Sage Weil355da1e2009-10-06 11:31:08 -07001275 have_lease = false;
Sage Weil355da1e2009-10-06 11:31:08 -07001276 }
1277
1278 if (have_lease)
1279 update_dentry_lease(dn, rinfo->dlease, session,
1280 req->r_request_started);
1281 dout(" final dn %p\n", dn);
Yan, Zheng86b58d12013-12-05 12:38:59 +08001282 } else if (!req->r_aborted &&
1283 (req->r_op == CEPH_MDS_OP_LOOKUPSNAP ||
1284 req->r_op == CEPH_MDS_OP_MKSNAP)) {
Sage Weil355da1e2009-10-06 11:31:08 -07001285 struct dentry *dn = req->r_dentry;
Yan, Zheng0a8a70f2014-04-14 13:13:02 +08001286 struct inode *dir = req->r_locked_dir;
Sage Weil355da1e2009-10-06 11:31:08 -07001287
1288 /* fill out a snapdir LOOKUPSNAP dentry */
1289 BUG_ON(!dn);
Yan, Zheng0a8a70f2014-04-14 13:13:02 +08001290 BUG_ON(!dir);
1291 BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR);
Sage Weil355da1e2009-10-06 11:31:08 -07001292 dout(" linking snapped dir %p to dn %p\n", in, dn);
Yan, Zheng70db4f32014-10-21 18:09:56 -07001293 ceph_dir_clear_ordered(dir);
Yan, Zheng86b58d12013-12-05 12:38:59 +08001294 ihold(in);
Yan, Zheng0a8a70f2014-04-14 13:13:02 +08001295 dn = splice_dentry(dn, in, NULL);
Sage Weil355da1e2009-10-06 11:31:08 -07001296 if (IS_ERR(dn)) {
1297 err = PTR_ERR(dn);
1298 goto done;
1299 }
1300 req->r_dentry = dn; /* may have spliced */
Sage Weil355da1e2009-10-06 11:31:08 -07001301 }
Sage Weil355da1e2009-10-06 11:31:08 -07001302done:
1303 dout("fill_trace done err=%d\n", err);
1304 return err;
1305}
1306
1307/*
1308 * Prepopulate our cache with readdir results, leases, etc.
1309 */
Sage Weil79f9f992013-01-29 02:55:31 -05001310static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req,
1311 struct ceph_mds_session *session)
1312{
1313 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1314 int i, err = 0;
1315
1316 for (i = 0; i < rinfo->dir_nr; i++) {
1317 struct ceph_vino vino;
1318 struct inode *in;
1319 int rc;
1320
1321 vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino);
1322 vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid);
1323
1324 in = ceph_get_inode(req->r_dentry->d_sb, vino);
1325 if (IS_ERR(in)) {
1326 err = PTR_ERR(in);
1327 dout("new_inode badness got %d\n", err);
1328 continue;
1329 }
Yan, Zheng01deead2014-11-14 21:56:29 +08001330 rc = fill_inode(in, NULL, &rinfo->dir_in[i], NULL, session,
Sage Weil79f9f992013-01-29 02:55:31 -05001331 req->r_request_started, -1,
1332 &req->r_caps_reservation);
1333 if (rc < 0) {
1334 pr_err("fill_inode badness on %p got %d\n", in, rc);
1335 err = rc;
1336 continue;
1337 }
1338 }
1339
1340 return err;
1341}
1342
Yan, Zhengfdd4e152015-06-16 20:48:56 +08001343void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl)
1344{
1345 if (ctl->page) {
1346 kunmap(ctl->page);
1347 page_cache_release(ctl->page);
1348 ctl->page = NULL;
1349 }
1350}
1351
1352static int fill_readdir_cache(struct inode *dir, struct dentry *dn,
1353 struct ceph_readdir_cache_control *ctl,
1354 struct ceph_mds_request *req)
1355{
1356 struct ceph_inode_info *ci = ceph_inode(dir);
1357 unsigned nsize = PAGE_CACHE_SIZE / sizeof(struct dentry*);
1358 unsigned idx = ctl->index % nsize;
1359 pgoff_t pgoff = ctl->index / nsize;
1360
1361 if (!ctl->page || pgoff != page_index(ctl->page)) {
1362 ceph_readdir_cache_release(ctl);
1363 ctl->page = grab_cache_page(&dir->i_data, pgoff);
1364 if (!ctl->page) {
1365 ctl->index = -1;
1366 return -ENOMEM;
1367 }
1368 /* reading/filling the cache are serialized by
1369 * i_mutex, no need to use page lock */
1370 unlock_page(ctl->page);
1371 ctl->dentries = kmap(ctl->page);
1372 }
1373
1374 if (req->r_dir_release_cnt == atomic64_read(&ci->i_release_count) &&
1375 req->r_dir_ordered_cnt == atomic64_read(&ci->i_ordered_count)) {
1376 dout("readdir cache dn %p idx %d\n", dn, ctl->index);
1377 ctl->dentries[idx] = dn;
1378 ctl->index++;
1379 } else {
1380 dout("disable readdir cache\n");
1381 ctl->index = -1;
1382 }
1383 return 0;
1384}
1385
Sage Weil355da1e2009-10-06 11:31:08 -07001386int ceph_readdir_prepopulate(struct ceph_mds_request *req,
1387 struct ceph_mds_session *session)
1388{
1389 struct dentry *parent = req->r_dentry;
1390 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1391 struct qstr dname;
1392 struct dentry *dn;
1393 struct inode *in;
Yan, Zheng86b58d12013-12-05 12:38:59 +08001394 int err = 0, ret, i;
Sage Weil355da1e2009-10-06 11:31:08 -07001395 struct inode *snapdir = NULL;
1396 struct ceph_mds_request_head *rhead = req->r_request->front.iov_base;
Sage Weil355da1e2009-10-06 11:31:08 -07001397 struct ceph_dentry_info *di;
Yan, Zheng81c6aea2013-09-18 09:44:13 +08001398 u32 frag = le32_to_cpu(rhead->args.readdir.frag);
Yan, Zhengfdd4e152015-06-16 20:48:56 +08001399 struct ceph_readdir_cache_control cache_ctl = {};
1400
1401 if (req->r_aborted)
1402 return readdir_prepopulate_inodes_only(req, session);
Yan, Zheng81c6aea2013-09-18 09:44:13 +08001403
1404 if (rinfo->dir_dir &&
1405 le32_to_cpu(rinfo->dir_dir->frag) != frag) {
1406 dout("readdir_prepopulate got new frag %x -> %x\n",
1407 frag, le32_to_cpu(rinfo->dir_dir->frag));
1408 frag = le32_to_cpu(rinfo->dir_dir->frag);
1409 if (ceph_frag_is_leftmost(frag))
Yan, Zhengfdd4e152015-06-16 20:48:56 +08001410 req->r_readdir_offset = 2;
Yan, Zheng81c6aea2013-09-18 09:44:13 +08001411 else
Yan, Zhengfdd4e152015-06-16 20:48:56 +08001412 req->r_readdir_offset = 0;
Yan, Zheng81c6aea2013-09-18 09:44:13 +08001413 }
Sage Weil355da1e2009-10-06 11:31:08 -07001414
1415 if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) {
David Howells2b0143b2015-03-17 22:25:59 +00001416 snapdir = ceph_get_snapdir(d_inode(parent));
Sage Weil355da1e2009-10-06 11:31:08 -07001417 parent = d_find_alias(snapdir);
1418 dout("readdir_prepopulate %d items under SNAPDIR dn %p\n",
1419 rinfo->dir_nr, parent);
1420 } else {
1421 dout("readdir_prepopulate %d items under dn %p\n",
1422 rinfo->dir_nr, parent);
1423 if (rinfo->dir_dir)
David Howells2b0143b2015-03-17 22:25:59 +00001424 ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir);
Sage Weil355da1e2009-10-06 11:31:08 -07001425 }
1426
Yan, Zhengfdd4e152015-06-16 20:48:56 +08001427 if (ceph_frag_is_leftmost(frag) && req->r_readdir_offset == 2) {
1428 /* note dir version at start of readdir so we can tell
1429 * if any dentries get dropped */
1430 struct ceph_inode_info *ci = ceph_inode(d_inode(parent));
1431 req->r_dir_release_cnt = atomic64_read(&ci->i_release_count);
1432 req->r_dir_ordered_cnt = atomic64_read(&ci->i_ordered_count);
1433 req->r_readdir_cache_idx = 0;
1434 }
1435
1436 cache_ctl.index = req->r_readdir_cache_idx;
1437
Yan, Zheng86b58d12013-12-05 12:38:59 +08001438 /* FIXME: release caps/leases if error occurs */
Sage Weil355da1e2009-10-06 11:31:08 -07001439 for (i = 0; i < rinfo->dir_nr; i++) {
1440 struct ceph_vino vino;
1441
1442 dname.name = rinfo->dir_dname[i];
1443 dname.len = rinfo->dir_dname_len[i];
1444 dname.hash = full_name_hash(dname.name, dname.len);
1445
1446 vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino);
1447 vino.snap = le64_to_cpu(rinfo->dir_in[i].in->snapid);
1448
1449retry_lookup:
1450 dn = d_lookup(parent, &dname);
1451 dout("d_lookup on parent=%p name=%.*s got %p\n",
1452 parent, dname.len, dname.name, dn);
1453
1454 if (!dn) {
1455 dn = d_alloc(parent, &dname);
1456 dout("d_alloc %p '%.*s' = %p\n", parent,
1457 dname.len, dname.name, dn);
1458 if (dn == NULL) {
1459 dout("d_alloc badness\n");
1460 err = -ENOMEM;
1461 goto out;
1462 }
Yan, Zheng86b58d12013-12-05 12:38:59 +08001463 ret = ceph_init_dentry(dn);
1464 if (ret < 0) {
Sage Weil8c696732010-07-22 14:11:56 -07001465 dput(dn);
Yan, Zheng86b58d12013-12-05 12:38:59 +08001466 err = ret;
Sage Weil355da1e2009-10-06 11:31:08 -07001467 goto out;
Sage Weil8c696732010-07-22 14:11:56 -07001468 }
David Howells2b0143b2015-03-17 22:25:59 +00001469 } else if (d_really_is_positive(dn) &&
1470 (ceph_ino(d_inode(dn)) != vino.ino ||
1471 ceph_snap(d_inode(dn)) != vino.snap)) {
Sage Weil355da1e2009-10-06 11:31:08 -07001472 dout(" dn %p points to wrong inode %p\n",
David Howells2b0143b2015-03-17 22:25:59 +00001473 dn, d_inode(dn));
Sage Weil355da1e2009-10-06 11:31:08 -07001474 d_delete(dn);
1475 dput(dn);
1476 goto retry_lookup;
Sage Weil355da1e2009-10-06 11:31:08 -07001477 }
1478
Sage Weil355da1e2009-10-06 11:31:08 -07001479 /* inode */
David Howells2b0143b2015-03-17 22:25:59 +00001480 if (d_really_is_positive(dn)) {
1481 in = d_inode(dn);
Sage Weil355da1e2009-10-06 11:31:08 -07001482 } else {
1483 in = ceph_get_inode(parent->d_sb, vino);
Dan Carpenterac1f12e2010-08-25 09:11:35 +02001484 if (IS_ERR(in)) {
Sage Weil355da1e2009-10-06 11:31:08 -07001485 dout("new_inode badness\n");
Al Viro2744c172012-09-26 21:41:05 -04001486 d_drop(dn);
Sage Weil355da1e2009-10-06 11:31:08 -07001487 dput(dn);
Dan Carpenterac1f12e2010-08-25 09:11:35 +02001488 err = PTR_ERR(in);
Sage Weil355da1e2009-10-06 11:31:08 -07001489 goto out;
1490 }
Sage Weil355da1e2009-10-06 11:31:08 -07001491 }
1492
Yan, Zhengfdd4e152015-06-16 20:48:56 +08001493 ret = fill_inode(in, NULL, &rinfo->dir_in[i], NULL, session,
1494 req->r_request_started, -1,
1495 &req->r_caps_reservation);
1496 if (ret < 0) {
Sage Weil355da1e2009-10-06 11:31:08 -07001497 pr_err("fill_inode badness on %p\n", in);
David Howells2b0143b2015-03-17 22:25:59 +00001498 if (d_really_is_negative(dn))
Yan, Zheng86b58d12013-12-05 12:38:59 +08001499 iput(in);
1500 d_drop(dn);
Yan, Zhengfdd4e152015-06-16 20:48:56 +08001501 err = ret;
Sage Weild69ed052010-06-21 10:38:14 -07001502 goto next_item;
Sage Weil355da1e2009-10-06 11:31:08 -07001503 }
Yan, Zheng86b58d12013-12-05 12:38:59 +08001504
David Howells2b0143b2015-03-17 22:25:59 +00001505 if (d_really_is_negative(dn)) {
Yan, Zheng5cba3722015-02-02 11:27:56 +08001506 struct dentry *realdn = splice_dentry(dn, in, NULL);
1507 if (IS_ERR(realdn)) {
1508 err = PTR_ERR(realdn);
1509 d_drop(dn);
Yan, Zheng86b58d12013-12-05 12:38:59 +08001510 dn = NULL;
1511 goto next_item;
1512 }
Yan, Zheng5cba3722015-02-02 11:27:56 +08001513 dn = realdn;
Yan, Zheng86b58d12013-12-05 12:38:59 +08001514 }
1515
1516 di = dn->d_fsdata;
Yan, Zhengfdd4e152015-06-16 20:48:56 +08001517 di->offset = ceph_make_fpos(frag, i + req->r_readdir_offset);
Yan, Zheng86b58d12013-12-05 12:38:59 +08001518
1519 update_dentry_lease(dn, rinfo->dir_dlease[i],
1520 req->r_session,
1521 req->r_request_started);
Yan, Zhengfdd4e152015-06-16 20:48:56 +08001522
1523 if (err == 0 && cache_ctl.index >= 0) {
1524 ret = fill_readdir_cache(d_inode(parent), dn,
1525 &cache_ctl, req);
1526 if (ret < 0)
1527 err = ret;
1528 }
Sage Weild69ed052010-06-21 10:38:14 -07001529next_item:
1530 if (dn)
1531 dput(dn);
Sage Weil355da1e2009-10-06 11:31:08 -07001532 }
Sage Weil355da1e2009-10-06 11:31:08 -07001533out:
Yan, Zhengfdd4e152015-06-16 20:48:56 +08001534 if (err == 0) {
1535 req->r_did_prepopulate = true;
1536 req->r_readdir_cache_idx = cache_ctl.index;
1537 }
1538 ceph_readdir_cache_release(&cache_ctl);
Sage Weil355da1e2009-10-06 11:31:08 -07001539 if (snapdir) {
1540 iput(snapdir);
1541 dput(parent);
1542 }
1543 dout("readdir_prepopulate done\n");
1544 return err;
1545}
1546
1547int ceph_inode_set_size(struct inode *inode, loff_t size)
1548{
1549 struct ceph_inode_info *ci = ceph_inode(inode);
1550 int ret = 0;
1551
Sage Weilbe655592011-11-30 09:47:09 -08001552 spin_lock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -07001553 dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size);
Yan, Zheng99c88e62015-12-30 11:32:46 +08001554 i_size_write(inode, size);
Sage Weil355da1e2009-10-06 11:31:08 -07001555 inode->i_blocks = (size + (1 << 9) - 1) >> 9;
1556
1557 /* tell the MDS if we are approaching max_size */
1558 if ((size << 1) >= ci->i_max_size &&
1559 (ci->i_reported_size << 1) < ci->i_max_size)
1560 ret = 1;
1561
Sage Weilbe655592011-11-30 09:47:09 -08001562 spin_unlock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -07001563 return ret;
1564}
1565
1566/*
1567 * Write back inode data in a worker thread. (This can't be done
1568 * in the message handler context.)
1569 */
Sage Weil3c6f6b72010-02-09 15:24:44 -08001570void ceph_queue_writeback(struct inode *inode)
1571{
Sage Weil15a20152011-11-05 22:06:31 -07001572 ihold(inode);
Sage Weil3c6f6b72010-02-09 15:24:44 -08001573 if (queue_work(ceph_inode_to_client(inode)->wb_wq,
1574 &ceph_inode(inode)->i_wb_work)) {
Sage Weil2c27c9a2010-02-17 15:45:51 -08001575 dout("ceph_queue_writeback %p\n", inode);
Sage Weil3c6f6b72010-02-09 15:24:44 -08001576 } else {
Sage Weil2c27c9a2010-02-17 15:45:51 -08001577 dout("ceph_queue_writeback %p failed\n", inode);
Sage Weil15a20152011-11-05 22:06:31 -07001578 iput(inode);
Sage Weil3c6f6b72010-02-09 15:24:44 -08001579 }
1580}
1581
1582static void ceph_writeback_work(struct work_struct *work)
Sage Weil355da1e2009-10-06 11:31:08 -07001583{
1584 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1585 i_wb_work);
1586 struct inode *inode = &ci->vfs_inode;
1587
1588 dout("writeback %p\n", inode);
1589 filemap_fdatawrite(&inode->i_data);
1590 iput(inode);
1591}
1592
1593/*
Sage Weil3c6f6b72010-02-09 15:24:44 -08001594 * queue an async invalidation
1595 */
1596void ceph_queue_invalidate(struct inode *inode)
1597{
Sage Weil15a20152011-11-05 22:06:31 -07001598 ihold(inode);
Sage Weil3c6f6b72010-02-09 15:24:44 -08001599 if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq,
1600 &ceph_inode(inode)->i_pg_inv_work)) {
1601 dout("ceph_queue_invalidate %p\n", inode);
Sage Weil3c6f6b72010-02-09 15:24:44 -08001602 } else {
1603 dout("ceph_queue_invalidate %p failed\n", inode);
Sage Weil15a20152011-11-05 22:06:31 -07001604 iput(inode);
Sage Weil3c6f6b72010-02-09 15:24:44 -08001605 }
1606}
1607
1608/*
Sage Weil355da1e2009-10-06 11:31:08 -07001609 * Invalidate inode pages in a worker thread. (This can't be done
1610 * in the message handler context.)
1611 */
Sage Weil3c6f6b72010-02-09 15:24:44 -08001612static void ceph_invalidate_work(struct work_struct *work)
Sage Weil355da1e2009-10-06 11:31:08 -07001613{
1614 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1615 i_pg_inv_work);
1616 struct inode *inode = &ci->vfs_inode;
1617 u32 orig_gen;
1618 int check = 0;
1619
Yan, Zhengb0d7c222013-08-12 21:42:15 -07001620 mutex_lock(&ci->i_truncate_mutex);
Sage Weilbe655592011-11-30 09:47:09 -08001621 spin_lock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -07001622 dout("invalidate_pages %p gen %d revoking %d\n", inode,
1623 ci->i_rdcache_gen, ci->i_rdcache_revoking);
Sage Weilcd045cb2010-11-04 11:05:05 -07001624 if (ci->i_rdcache_revoking != ci->i_rdcache_gen) {
Yan, Zheng9563f882013-11-22 13:50:45 +08001625 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
1626 check = 1;
Sage Weilbe655592011-11-30 09:47:09 -08001627 spin_unlock(&ci->i_ceph_lock);
Yan, Zhengb0d7c222013-08-12 21:42:15 -07001628 mutex_unlock(&ci->i_truncate_mutex);
Sage Weil355da1e2009-10-06 11:31:08 -07001629 goto out;
1630 }
1631 orig_gen = ci->i_rdcache_gen;
Sage Weilbe655592011-11-30 09:47:09 -08001632 spin_unlock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -07001633
Yan, Zheng4e217b52014-06-08 05:08:56 +08001634 truncate_pagecache(inode, 0);
Sage Weil355da1e2009-10-06 11:31:08 -07001635
Sage Weilbe655592011-11-30 09:47:09 -08001636 spin_lock(&ci->i_ceph_lock);
Sage Weilcd045cb2010-11-04 11:05:05 -07001637 if (orig_gen == ci->i_rdcache_gen &&
1638 orig_gen == ci->i_rdcache_revoking) {
Sage Weil355da1e2009-10-06 11:31:08 -07001639 dout("invalidate_pages %p gen %d successful\n", inode,
1640 ci->i_rdcache_gen);
Sage Weilcd045cb2010-11-04 11:05:05 -07001641 ci->i_rdcache_revoking--;
Sage Weil355da1e2009-10-06 11:31:08 -07001642 check = 1;
1643 } else {
Sage Weilcd045cb2010-11-04 11:05:05 -07001644 dout("invalidate_pages %p gen %d raced, now %d revoking %d\n",
1645 inode, orig_gen, ci->i_rdcache_gen,
1646 ci->i_rdcache_revoking);
Yan, Zheng9563f882013-11-22 13:50:45 +08001647 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
1648 check = 1;
Sage Weil355da1e2009-10-06 11:31:08 -07001649 }
Sage Weilbe655592011-11-30 09:47:09 -08001650 spin_unlock(&ci->i_ceph_lock);
Yan, Zhengb0d7c222013-08-12 21:42:15 -07001651 mutex_unlock(&ci->i_truncate_mutex);
Yan, Zheng9563f882013-11-22 13:50:45 +08001652out:
Sage Weil355da1e2009-10-06 11:31:08 -07001653 if (check)
1654 ceph_check_caps(ci, 0, NULL);
Sage Weil355da1e2009-10-06 11:31:08 -07001655 iput(inode);
1656}
1657
1658
1659/*
Yan, Zheng3f999692013-03-01 10:57:54 +08001660 * called by trunc_wq;
Sage Weil355da1e2009-10-06 11:31:08 -07001661 *
1662 * We also truncate in a separate thread as well.
1663 */
Sage Weil3c6f6b72010-02-09 15:24:44 -08001664static void ceph_vmtruncate_work(struct work_struct *work)
Sage Weil355da1e2009-10-06 11:31:08 -07001665{
1666 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
1667 i_vmtruncate_work);
1668 struct inode *inode = &ci->vfs_inode;
1669
1670 dout("vmtruncate_work %p\n", inode);
Yan, Zhengb415bf42013-07-02 12:40:19 +08001671 __ceph_do_pending_vmtruncate(inode);
Sage Weil355da1e2009-10-06 11:31:08 -07001672 iput(inode);
1673}
1674
1675/*
Sage Weil3c6f6b72010-02-09 15:24:44 -08001676 * Queue an async vmtruncate. If we fail to queue work, we will handle
1677 * the truncation the next time we call __ceph_do_pending_vmtruncate.
1678 */
1679void ceph_queue_vmtruncate(struct inode *inode)
1680{
1681 struct ceph_inode_info *ci = ceph_inode(inode);
1682
Sage Weil15a20152011-11-05 22:06:31 -07001683 ihold(inode);
Milosz Tanski99ccbd22013-08-21 17:29:54 -04001684
Cheng Renquan640ef792010-03-26 17:40:33 +08001685 if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq,
Sage Weil3c6f6b72010-02-09 15:24:44 -08001686 &ci->i_vmtruncate_work)) {
1687 dout("ceph_queue_vmtruncate %p\n", inode);
Sage Weil3c6f6b72010-02-09 15:24:44 -08001688 } else {
1689 dout("ceph_queue_vmtruncate %p failed, pending=%d\n",
1690 inode, ci->i_truncate_pending);
Sage Weil15a20152011-11-05 22:06:31 -07001691 iput(inode);
Sage Weil3c6f6b72010-02-09 15:24:44 -08001692 }
1693}
1694
1695/*
Sage Weil355da1e2009-10-06 11:31:08 -07001696 * Make sure any pending truncation is applied before doing anything
1697 * that may depend on it.
1698 */
Yan, Zhengb415bf42013-07-02 12:40:19 +08001699void __ceph_do_pending_vmtruncate(struct inode *inode)
Sage Weil355da1e2009-10-06 11:31:08 -07001700{
1701 struct ceph_inode_info *ci = ceph_inode(inode);
1702 u64 to;
Yan, Zhenga85f50b2012-11-19 10:49:08 +08001703 int wrbuffer_refs, finish = 0;
Sage Weil355da1e2009-10-06 11:31:08 -07001704
Yan, Zhengb0d7c222013-08-12 21:42:15 -07001705 mutex_lock(&ci->i_truncate_mutex);
Sage Weil355da1e2009-10-06 11:31:08 -07001706retry:
Sage Weilbe655592011-11-30 09:47:09 -08001707 spin_lock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -07001708 if (ci->i_truncate_pending == 0) {
1709 dout("__do_pending_vmtruncate %p none pending\n", inode);
Sage Weilbe655592011-11-30 09:47:09 -08001710 spin_unlock(&ci->i_ceph_lock);
Yan, Zhengb0d7c222013-08-12 21:42:15 -07001711 mutex_unlock(&ci->i_truncate_mutex);
Sage Weil355da1e2009-10-06 11:31:08 -07001712 return;
1713 }
1714
1715 /*
1716 * make sure any dirty snapped pages are flushed before we
1717 * possibly truncate them.. so write AND block!
1718 */
1719 if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) {
1720 dout("__do_pending_vmtruncate %p flushing snaps first\n",
1721 inode);
Sage Weilbe655592011-11-30 09:47:09 -08001722 spin_unlock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -07001723 filemap_write_and_wait_range(&inode->i_data, 0,
1724 inode->i_sb->s_maxbytes);
1725 goto retry;
1726 }
1727
Yan, Zhengb0d7c222013-08-12 21:42:15 -07001728 /* there should be no reader or writer */
1729 WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref);
1730
Sage Weil355da1e2009-10-06 11:31:08 -07001731 to = ci->i_truncate_size;
1732 wrbuffer_refs = ci->i_wrbuffer_ref;
1733 dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode,
1734 ci->i_truncate_pending, to);
Sage Weilbe655592011-11-30 09:47:09 -08001735 spin_unlock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -07001736
Yan, Zheng4e217b52014-06-08 05:08:56 +08001737 truncate_pagecache(inode, to);
Sage Weil355da1e2009-10-06 11:31:08 -07001738
Sage Weilbe655592011-11-30 09:47:09 -08001739 spin_lock(&ci->i_ceph_lock);
Yan, Zhenga85f50b2012-11-19 10:49:08 +08001740 if (to == ci->i_truncate_size) {
1741 ci->i_truncate_pending = 0;
1742 finish = 1;
1743 }
Sage Weilbe655592011-11-30 09:47:09 -08001744 spin_unlock(&ci->i_ceph_lock);
Yan, Zhenga85f50b2012-11-19 10:49:08 +08001745 if (!finish)
1746 goto retry;
Sage Weil355da1e2009-10-06 11:31:08 -07001747
Yan, Zhengb0d7c222013-08-12 21:42:15 -07001748 mutex_unlock(&ci->i_truncate_mutex);
1749
Sage Weil355da1e2009-10-06 11:31:08 -07001750 if (wrbuffer_refs == 0)
1751 ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
Yan, Zhenga85f50b2012-11-19 10:49:08 +08001752
1753 wake_up_all(&ci->i_cap_wq);
Sage Weil355da1e2009-10-06 11:31:08 -07001754}
1755
Sage Weil355da1e2009-10-06 11:31:08 -07001756/*
1757 * symlinks
1758 */
Sage Weil355da1e2009-10-06 11:31:08 -07001759static const struct inode_operations ceph_symlink_iops = {
1760 .readlink = generic_readlink,
Al Viro6b255392015-11-17 10:20:54 -05001761 .get_link = simple_get_link,
Yan, Zheng0b932672013-04-07 16:28:49 +08001762 .setattr = ceph_setattr,
1763 .getattr = ceph_getattr,
1764 .setxattr = ceph_setxattr,
1765 .getxattr = ceph_getxattr,
1766 .listxattr = ceph_listxattr,
1767 .removexattr = ceph_removexattr,
Sage Weil355da1e2009-10-06 11:31:08 -07001768};
1769
1770/*
1771 * setattr
1772 */
1773int ceph_setattr(struct dentry *dentry, struct iattr *attr)
1774{
David Howells2b0143b2015-03-17 22:25:59 +00001775 struct inode *inode = d_inode(dentry);
Sage Weil355da1e2009-10-06 11:31:08 -07001776 struct ceph_inode_info *ci = ceph_inode(inode);
Sage Weil355da1e2009-10-06 11:31:08 -07001777 const unsigned int ia_valid = attr->ia_valid;
1778 struct ceph_mds_request *req;
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07001779 struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc;
Yan, Zhengf66fd9f2015-06-10 17:26:13 +08001780 struct ceph_cap_flush *prealloc_cf;
Sage Weil355da1e2009-10-06 11:31:08 -07001781 int issued;
1782 int release = 0, dirtied = 0;
1783 int mask = 0;
1784 int err = 0;
Sage Weilfca65b42011-05-04 11:33:47 -07001785 int inode_dirty_flags = 0;
Yan, Zheng604d1b02015-05-01 17:49:16 +08001786 bool lock_snap_rwsem = false;
Sage Weil355da1e2009-10-06 11:31:08 -07001787
1788 if (ceph_snap(inode) != CEPH_NOSNAP)
1789 return -EROFS;
1790
Sage Weil355da1e2009-10-06 11:31:08 -07001791 err = inode_change_ok(inode, attr);
1792 if (err != 0)
1793 return err;
1794
Yan, Zhengf66fd9f2015-06-10 17:26:13 +08001795 prealloc_cf = ceph_alloc_cap_flush();
1796 if (!prealloc_cf)
1797 return -ENOMEM;
1798
Sage Weil355da1e2009-10-06 11:31:08 -07001799 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR,
1800 USE_AUTH_MDS);
Yan, Zhengf66fd9f2015-06-10 17:26:13 +08001801 if (IS_ERR(req)) {
1802 ceph_free_cap_flush(prealloc_cf);
Sage Weil355da1e2009-10-06 11:31:08 -07001803 return PTR_ERR(req);
Yan, Zhengf66fd9f2015-06-10 17:26:13 +08001804 }
Sage Weil355da1e2009-10-06 11:31:08 -07001805
Sage Weilbe655592011-11-30 09:47:09 -08001806 spin_lock(&ci->i_ceph_lock);
Sage Weil355da1e2009-10-06 11:31:08 -07001807 issued = __ceph_caps_issued(ci, NULL);
Yan, Zheng604d1b02015-05-01 17:49:16 +08001808
1809 if (!ci->i_head_snapc &&
1810 (issued & (CEPH_CAP_ANY_EXCL | CEPH_CAP_FILE_WR))) {
1811 lock_snap_rwsem = true;
1812 if (!down_read_trylock(&mdsc->snap_rwsem)) {
1813 spin_unlock(&ci->i_ceph_lock);
1814 down_read(&mdsc->snap_rwsem);
1815 spin_lock(&ci->i_ceph_lock);
1816 issued = __ceph_caps_issued(ci, NULL);
1817 }
1818 }
1819
Sage Weil355da1e2009-10-06 11:31:08 -07001820 dout("setattr %p issued %s\n", inode, ceph_cap_string(issued));
1821
1822 if (ia_valid & ATTR_UID) {
1823 dout("setattr %p uid %d -> %d\n", inode,
Eric W. Biedermanbd2bae62013-01-31 04:05:39 -08001824 from_kuid(&init_user_ns, inode->i_uid),
1825 from_kuid(&init_user_ns, attr->ia_uid));
Sage Weil355da1e2009-10-06 11:31:08 -07001826 if (issued & CEPH_CAP_AUTH_EXCL) {
1827 inode->i_uid = attr->ia_uid;
1828 dirtied |= CEPH_CAP_AUTH_EXCL;
1829 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
Eric W. Biedermanab871b92013-01-31 03:40:12 -08001830 !uid_eq(attr->ia_uid, inode->i_uid)) {
1831 req->r_args.setattr.uid = cpu_to_le32(
1832 from_kuid(&init_user_ns, attr->ia_uid));
Sage Weil355da1e2009-10-06 11:31:08 -07001833 mask |= CEPH_SETATTR_UID;
1834 release |= CEPH_CAP_AUTH_SHARED;
1835 }
1836 }
1837 if (ia_valid & ATTR_GID) {
1838 dout("setattr %p gid %d -> %d\n", inode,
Eric W. Biedermanbd2bae62013-01-31 04:05:39 -08001839 from_kgid(&init_user_ns, inode->i_gid),
1840 from_kgid(&init_user_ns, attr->ia_gid));
Sage Weil355da1e2009-10-06 11:31:08 -07001841 if (issued & CEPH_CAP_AUTH_EXCL) {
1842 inode->i_gid = attr->ia_gid;
1843 dirtied |= CEPH_CAP_AUTH_EXCL;
1844 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
Eric W. Biedermanab871b92013-01-31 03:40:12 -08001845 !gid_eq(attr->ia_gid, inode->i_gid)) {
1846 req->r_args.setattr.gid = cpu_to_le32(
1847 from_kgid(&init_user_ns, attr->ia_gid));
Sage Weil355da1e2009-10-06 11:31:08 -07001848 mask |= CEPH_SETATTR_GID;
1849 release |= CEPH_CAP_AUTH_SHARED;
1850 }
1851 }
1852 if (ia_valid & ATTR_MODE) {
1853 dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode,
1854 attr->ia_mode);
1855 if (issued & CEPH_CAP_AUTH_EXCL) {
1856 inode->i_mode = attr->ia_mode;
1857 dirtied |= CEPH_CAP_AUTH_EXCL;
1858 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
1859 attr->ia_mode != inode->i_mode) {
Guangliang Zhao7221fe42013-11-11 15:18:03 +08001860 inode->i_mode = attr->ia_mode;
Sage Weil355da1e2009-10-06 11:31:08 -07001861 req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode);
1862 mask |= CEPH_SETATTR_MODE;
1863 release |= CEPH_CAP_AUTH_SHARED;
1864 }
1865 }
1866
1867 if (ia_valid & ATTR_ATIME) {
1868 dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode,
1869 inode->i_atime.tv_sec, inode->i_atime.tv_nsec,
1870 attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec);
1871 if (issued & CEPH_CAP_FILE_EXCL) {
1872 ci->i_time_warp_seq++;
1873 inode->i_atime = attr->ia_atime;
1874 dirtied |= CEPH_CAP_FILE_EXCL;
1875 } else if ((issued & CEPH_CAP_FILE_WR) &&
1876 timespec_compare(&inode->i_atime,
1877 &attr->ia_atime) < 0) {
1878 inode->i_atime = attr->ia_atime;
1879 dirtied |= CEPH_CAP_FILE_WR;
1880 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
1881 !timespec_equal(&inode->i_atime, &attr->ia_atime)) {
1882 ceph_encode_timespec(&req->r_args.setattr.atime,
1883 &attr->ia_atime);
1884 mask |= CEPH_SETATTR_ATIME;
1885 release |= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD |
1886 CEPH_CAP_FILE_WR;
1887 }
1888 }
1889 if (ia_valid & ATTR_MTIME) {
1890 dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode,
1891 inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
1892 attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec);
1893 if (issued & CEPH_CAP_FILE_EXCL) {
1894 ci->i_time_warp_seq++;
1895 inode->i_mtime = attr->ia_mtime;
1896 dirtied |= CEPH_CAP_FILE_EXCL;
1897 } else if ((issued & CEPH_CAP_FILE_WR) &&
1898 timespec_compare(&inode->i_mtime,
1899 &attr->ia_mtime) < 0) {
1900 inode->i_mtime = attr->ia_mtime;
1901 dirtied |= CEPH_CAP_FILE_WR;
1902 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
1903 !timespec_equal(&inode->i_mtime, &attr->ia_mtime)) {
1904 ceph_encode_timespec(&req->r_args.setattr.mtime,
1905 &attr->ia_mtime);
1906 mask |= CEPH_SETATTR_MTIME;
1907 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD |
1908 CEPH_CAP_FILE_WR;
1909 }
1910 }
1911 if (ia_valid & ATTR_SIZE) {
1912 dout("setattr %p size %lld -> %lld\n", inode,
1913 inode->i_size, attr->ia_size);
Sage Weil355da1e2009-10-06 11:31:08 -07001914 if ((issued & CEPH_CAP_FILE_EXCL) &&
1915 attr->ia_size > inode->i_size) {
Yan, Zheng99c88e62015-12-30 11:32:46 +08001916 i_size_write(inode, attr->ia_size);
Sage Weil355da1e2009-10-06 11:31:08 -07001917 inode->i_blocks =
1918 (attr->ia_size + (1 << 9) - 1) >> 9;
1919 inode->i_ctime = attr->ia_ctime;
1920 ci->i_reported_size = attr->ia_size;
1921 dirtied |= CEPH_CAP_FILE_EXCL;
1922 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
1923 attr->ia_size != inode->i_size) {
1924 req->r_args.setattr.size = cpu_to_le64(attr->ia_size);
1925 req->r_args.setattr.old_size =
1926 cpu_to_le64(inode->i_size);
1927 mask |= CEPH_SETATTR_SIZE;
1928 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD |
1929 CEPH_CAP_FILE_WR;
1930 }
1931 }
1932
1933 /* these do nothing */
1934 if (ia_valid & ATTR_CTIME) {
1935 bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME|
1936 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0;
1937 dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode,
1938 inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
1939 attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec,
1940 only ? "ctime only" : "ignored");
1941 inode->i_ctime = attr->ia_ctime;
1942 if (only) {
1943 /*
1944 * if kernel wants to dirty ctime but nothing else,
1945 * we need to choose a cap to dirty under, or do
1946 * a almost-no-op setattr
1947 */
1948 if (issued & CEPH_CAP_AUTH_EXCL)
1949 dirtied |= CEPH_CAP_AUTH_EXCL;
1950 else if (issued & CEPH_CAP_FILE_EXCL)
1951 dirtied |= CEPH_CAP_FILE_EXCL;
1952 else if (issued & CEPH_CAP_XATTR_EXCL)
1953 dirtied |= CEPH_CAP_XATTR_EXCL;
1954 else
1955 mask |= CEPH_SETATTR_CTIME;
1956 }
1957 }
1958 if (ia_valid & ATTR_FILE)
1959 dout("setattr %p ATTR_FILE ... hrm!\n", inode);
1960
1961 if (dirtied) {
Yan, Zhengf66fd9f2015-06-10 17:26:13 +08001962 inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied,
1963 &prealloc_cf);
Sage Weil355da1e2009-10-06 11:31:08 -07001964 inode->i_ctime = CURRENT_TIME;
1965 }
1966
1967 release &= issued;
Sage Weilbe655592011-11-30 09:47:09 -08001968 spin_unlock(&ci->i_ceph_lock);
Yan, Zheng604d1b02015-05-01 17:49:16 +08001969 if (lock_snap_rwsem)
1970 up_read(&mdsc->snap_rwsem);
Sage Weil355da1e2009-10-06 11:31:08 -07001971
Sage Weilfca65b42011-05-04 11:33:47 -07001972 if (inode_dirty_flags)
1973 __mark_inode_dirty(inode, inode_dirty_flags);
1974
Guangliang Zhao7221fe42013-11-11 15:18:03 +08001975 if (ia_valid & ATTR_MODE) {
Linus Torvalds4db658e2014-01-28 18:06:18 -08001976 err = posix_acl_chmod(inode, attr->ia_mode);
Guangliang Zhao7221fe42013-11-11 15:18:03 +08001977 if (err)
1978 goto out_put;
1979 }
1980
Sage Weil355da1e2009-10-06 11:31:08 -07001981 if (mask) {
Sage Weil70b666c2011-05-27 09:24:26 -07001982 req->r_inode = inode;
1983 ihold(inode);
Sage Weil355da1e2009-10-06 11:31:08 -07001984 req->r_inode_drop = release;
1985 req->r_args.setattr.mask = cpu_to_le32(mask);
1986 req->r_num_caps = 1;
Sage Weil752c8bd2013-02-05 13:52:29 -08001987 err = ceph_mdsc_do_request(mdsc, NULL, req);
Sage Weil355da1e2009-10-06 11:31:08 -07001988 }
1989 dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err,
1990 ceph_cap_string(dirtied), mask);
1991
1992 ceph_mdsc_put_request(req);
Yan, Zhengb0d7c222013-08-12 21:42:15 -07001993 if (mask & CEPH_SETATTR_SIZE)
1994 __ceph_do_pending_vmtruncate(inode);
Yan, Zhengf66fd9f2015-06-10 17:26:13 +08001995 ceph_free_cap_flush(prealloc_cf);
Sage Weil355da1e2009-10-06 11:31:08 -07001996 return err;
Guangliang Zhao7221fe42013-11-11 15:18:03 +08001997out_put:
Sage Weil355da1e2009-10-06 11:31:08 -07001998 ceph_mdsc_put_request(req);
Yan, Zhengf66fd9f2015-06-10 17:26:13 +08001999 ceph_free_cap_flush(prealloc_cf);
Sage Weil355da1e2009-10-06 11:31:08 -07002000 return err;
2001}
2002
2003/*
2004 * Verify that we have a lease on the given mask. If not,
2005 * do a getattr against an mds.
2006 */
Yan, Zheng01deead2014-11-14 21:56:29 +08002007int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
2008 int mask, bool force)
Sage Weil355da1e2009-10-06 11:31:08 -07002009{
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07002010 struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
2011 struct ceph_mds_client *mdsc = fsc->mdsc;
Sage Weil355da1e2009-10-06 11:31:08 -07002012 struct ceph_mds_request *req;
2013 int err;
2014
2015 if (ceph_snap(inode) == CEPH_SNAPDIR) {
2016 dout("do_getattr inode %p SNAPDIR\n", inode);
2017 return 0;
2018 }
2019
Yan, Zheng01deead2014-11-14 21:56:29 +08002020 dout("do_getattr inode %p mask %s mode 0%o\n",
2021 inode, ceph_cap_string(mask), inode->i_mode);
Yan, Zheng508b32d2014-09-16 21:46:17 +08002022 if (!force && ceph_caps_issued_mask(ceph_inode(inode), mask, 1))
Sage Weil355da1e2009-10-06 11:31:08 -07002023 return 0;
2024
2025 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
2026 if (IS_ERR(req))
2027 return PTR_ERR(req);
Sage Weil70b666c2011-05-27 09:24:26 -07002028 req->r_inode = inode;
2029 ihold(inode);
Sage Weil355da1e2009-10-06 11:31:08 -07002030 req->r_num_caps = 1;
2031 req->r_args.getattr.mask = cpu_to_le32(mask);
Yan, Zheng01deead2014-11-14 21:56:29 +08002032 req->r_locked_page = locked_page;
Sage Weil355da1e2009-10-06 11:31:08 -07002033 err = ceph_mdsc_do_request(mdsc, NULL, req);
Yan, Zheng01deead2014-11-14 21:56:29 +08002034 if (locked_page && err == 0) {
2035 u64 inline_version = req->r_reply_info.targeti.inline_version;
2036 if (inline_version == 0) {
2037 /* the reply is supposed to contain inline data */
2038 err = -EINVAL;
2039 } else if (inline_version == CEPH_INLINE_NONE) {
2040 err = -ENODATA;
2041 } else {
2042 err = req->r_reply_info.targeti.inline_len;
2043 }
2044 }
Sage Weil355da1e2009-10-06 11:31:08 -07002045 ceph_mdsc_put_request(req);
2046 dout("do_getattr result=%d\n", err);
2047 return err;
2048}
2049
2050
2051/*
2052 * Check inode permissions. We verify we have a valid value for
2053 * the AUTH cap, then call the generic handler.
2054 */
Al Viro10556cb2011-06-20 19:28:19 -04002055int ceph_permission(struct inode *inode, int mask)
Sage Weil355da1e2009-10-06 11:31:08 -07002056{
Nick Pigginb74c79e2011-01-07 17:49:58 +11002057 int err;
2058
Al Viro10556cb2011-06-20 19:28:19 -04002059 if (mask & MAY_NOT_BLOCK)
Nick Pigginb74c79e2011-01-07 17:49:58 +11002060 return -ECHILD;
2061
Yan, Zheng508b32d2014-09-16 21:46:17 +08002062 err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false);
Sage Weil355da1e2009-10-06 11:31:08 -07002063
2064 if (!err)
Al Viro2830ba72011-06-20 19:16:29 -04002065 err = generic_permission(inode, mask);
Sage Weil355da1e2009-10-06 11:31:08 -07002066 return err;
2067}
2068
2069/*
2070 * Get all attributes. Hopefully somedata we'll have a statlite()
2071 * and can limit the fields we require to be accurate.
2072 */
2073int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry,
2074 struct kstat *stat)
2075{
David Howells2b0143b2015-03-17 22:25:59 +00002076 struct inode *inode = d_inode(dentry);
Sage Weil232d4b02009-10-21 11:21:49 -07002077 struct ceph_inode_info *ci = ceph_inode(inode);
Sage Weil355da1e2009-10-06 11:31:08 -07002078 int err;
2079
Yan, Zheng508b32d2014-09-16 21:46:17 +08002080 err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL, false);
Sage Weil355da1e2009-10-06 11:31:08 -07002081 if (!err) {
2082 generic_fillattr(inode, stat);
Yehuda Sadehad1fee92011-01-21 16:44:03 -08002083 stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino);
Sage Weil355da1e2009-10-06 11:31:08 -07002084 if (ceph_snap(inode) != CEPH_NOSNAP)
2085 stat->dev = ceph_snap(inode);
2086 else
2087 stat->dev = 0;
Sage Weil232d4b02009-10-21 11:21:49 -07002088 if (S_ISDIR(inode->i_mode)) {
Yehuda Sadeh1c1266b2011-01-12 16:53:27 -08002089 if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb),
2090 RBYTES))
2091 stat->size = ci->i_rbytes;
2092 else
2093 stat->size = ci->i_files + ci->i_subdirs;
Sage Weil232d4b02009-10-21 11:21:49 -07002094 stat->blocks = 0;
Sage Weil355da1e2009-10-06 11:31:08 -07002095 stat->blksize = 65536;
Sage Weil232d4b02009-10-21 11:21:49 -07002096 }
Sage Weil355da1e2009-10-06 11:31:08 -07002097 }
2098 return err;
2099}