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ceph: always set initial i_blkbits to CEPH_FSCRYPT_BLOCK_SHIFT
[linux-2.6-block.git] / fs / ceph / inode.c
CommitLineData
b2441318 1// SPDX-License-Identifier: GPL-2.0
3d14c5d2 2#include <linux/ceph/ceph_debug.h>
355da1eb
SW		 3
4#include <linux/module.h>
5#include <linux/fs.h>
355da1eb
SW		 6#include <linux/slab.h>
7#include <linux/string.h>
8#include <linux/uaccess.h>
9#include <linux/kernel.h>
355da1eb
SW		 10#include <linux/writeback.h>
11#include <linux/vmalloc.h>
2cdeb1e4 12#include <linux/xattr.h>
4db658ea 13#include <linux/posix_acl.h>
3e7fbe9c 14#include <linux/random.h>
a407846e 15#include <linux/sort.h>
a35ead31 16#include <linux/iversion.h>
2d332d5b 17#include <linux/fscrypt.h>
355da1eb
SW		 18
19#include "super.h"
3d14c5d2 20#include "mds_client.h"
99ccbd22 21#include "cache.h"
2d332d5b 22#include "crypto.h"
3d14c5d2 23#include <linux/ceph/decode.h>
355da1eb
SW		 24
25/*
26 * Ceph inode operations
27 *
28 * Implement basic inode helpers (get, alloc) and inode ops (getattr,
29 * setattr, etc.), xattr helpers, and helpers for assimilating
30 * metadata returned by the MDS into our cache.
31 *
32 * Also define helpers for doing asynchronous writeback, invalidation,
33 * and truncation for the benefit of those who can't afford to block
34 * (typically because they are in the message handler path).
35 */
36
37static const struct inode_operations ceph_symlink_iops;
79f2f6ad 38static const struct inode_operations ceph_encrypted_symlink_iops;
355da1eb 39
1cf89a8d 40static void ceph_inode_work(struct work_struct *work);
355da1eb
SW		 41
42/*
43 * find or create an inode, given the ceph ino number
44 */
ad1fee96
YS		 45static int ceph_set_ino_cb(struct inode *inode, void *data)
46{
ebce3eb2 47 struct ceph_inode_info *ci = ceph_inode(inode);
1dd8d470 48 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb);
ebce3eb2
JL		 49
50 ci->i_vino = *(struct ceph_vino *)data;
51 inode->i_ino = ceph_vino_to_ino_t(ci->i_vino);
a35ead31 52 inode_set_iversion_raw(inode, 0);
1dd8d470
XL		 53 percpu_counter_inc(&mdsc->metric.total_inodes);
54
ad1fee96
YS		 55 return 0;
56}
57
ec9595c0
JL		 58/**
59 * ceph_new_inode - allocate a new inode in advance of an expected create
60 * @dir: parent directory for new inode
61 * @dentry: dentry that may eventually point to new inode
62 * @mode: mode of new inode
63 * @as_ctx: pointer to inherited security context
64 *
65 * Allocate a new inode in advance of an operation to create a new inode.
66 * This allocates the inode and sets up the acl_sec_ctx with appropriate
67 * info for the new inode.
68 *
69 * Returns a pointer to the new inode or an ERR_PTR.
70 */
71struct inode *ceph_new_inode(struct inode *dir, struct dentry *dentry,
72 umode_t *mode, struct ceph_acl_sec_ctx *as_ctx)
73{
74 int err;
75 struct inode *inode;
76
77 inode = new_inode(dir->i_sb);
78 if (!inode)
79 return ERR_PTR(-ENOMEM);
80
bbb20ea9
XL		 81 inode->i_blkbits = CEPH_FSCRYPT_BLOCK_SHIFT;
82
ec9595c0
JL		 83 if (!S_ISLNK(*mode)) {
84 err = ceph_pre_init_acls(dir, mode, as_ctx);
85 if (err < 0)
86 goto out_err;
87 }
88
6b5717bd
JL		 89 inode->i_state = 0;
90 inode->i_mode = *mode;
91
ec9595c0
JL		 92 err = ceph_security_init_secctx(dentry, *mode, as_ctx);
93 if (err < 0)
94 goto out_err;
95
dd66df00
LH		 96 /*
97 * We'll skip setting fscrypt context for snapshots, leaving that for
98 * the handle_reply().
99 */
100 if (ceph_snap(dir) != CEPH_SNAPDIR) {
101 err = ceph_fscrypt_prepare_context(dir, inode, as_ctx);
102 if (err)
103 goto out_err;
104 }
6b5717bd 105
ec9595c0
JL		 106 return inode;
107out_err:
108 iput(inode);
109 return ERR_PTR(err);
110}
111
112void ceph_as_ctx_to_req(struct ceph_mds_request *req,
113 struct ceph_acl_sec_ctx *as_ctx)
114{
115 if (as_ctx->pagelist) {
116 req->r_pagelist = as_ctx->pagelist;
117 as_ctx->pagelist = NULL;
118 }
6b5717bd 119 ceph_fscrypt_as_ctx_to_req(req, as_ctx);
ec9595c0
JL		 120}
121
122/**
123 * ceph_get_inode - find or create/hash a new inode
124 * @sb: superblock to search and allocate in
125 * @vino: vino to search for
126 * @newino: optional new inode to insert if one isn't found (may be NULL)
127 *
128 * Search for or insert a new inode into the hash for the given vino, and
129 * return a reference to it. If new is non-NULL, its reference is consumed.
130 */
131struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino,
132 struct inode *newino)
355da1eb 133{
38d46409
XL		 134 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(sb);
135 struct ceph_client *cl = mdsc->fsc->client;
355da1eb 136 struct inode *inode;
355da1eb 137
d4f6b31d
JL		 138 if (ceph_vino_is_reserved(vino))
139 return ERR_PTR(-EREMOTEIO);
140
ec9595c0
JL		 141 if (newino) {
142 inode = inode_insert5(newino, (unsigned long)vino.ino,
143 ceph_ino_compare, ceph_set_ino_cb, &vino);
144 if (inode != newino)
145 iput(newino);
146 } else {
147 inode = iget5_locked(sb, (unsigned long)vino.ino,
148 ceph_ino_compare, ceph_set_ino_cb, &vino);
149 }
150
151 if (!inode) {
38d46409 152 doutc(cl, "no inode found for %llx.%llx\n", vino.ino, vino.snap);
355da1eb 153 return ERR_PTR(-ENOMEM);
ec9595c0 154 }
355da1eb 155
38d46409
XL		 156 doutc(cl, "on %llx=%llx.%llx got %p new %d\n",
157 ceph_present_inode(inode), ceph_vinop(inode), inode,
158 !!(inode->i_state & I_NEW));
355da1eb
SW		 159 return inode;
160}
161
162/*
163 * get/constuct snapdir inode for a given directory
164 */
165struct inode *ceph_get_snapdir(struct inode *parent)
166{
38d46409 167 struct ceph_client *cl = ceph_inode_to_client(parent);
355da1eb
SW		 168 struct ceph_vino vino = {
169 .ino = ceph_ino(parent),
170 .snap = CEPH_SNAPDIR,
171 };
ec9595c0 172 struct inode *inode = ceph_get_inode(parent->i_sb, vino, NULL);
b377ff13 173 struct ceph_inode_info *ci = ceph_inode(inode);
dd66df00 174 int ret = -ENOTDIR;
355da1eb 175
355da1eb 176 if (IS_ERR(inode))
7e34bc52 177 return inode;
3e10a15f
JL		 178
179 if (!S_ISDIR(parent->i_mode)) {
38d46409
XL		 180 pr_warn_once_client(cl, "bad snapdir parent type (mode=0%o)\n",
181 parent->i_mode);
322794d3 182 goto err;
3e10a15f
JL		 183 }
184
185 if (!(inode->i_state & I_NEW) && !S_ISDIR(inode->i_mode)) {
38d46409
XL		 186 pr_warn_once_client(cl, "bad snapdir inode type (mode=0%o)\n",
187 inode->i_mode);
322794d3 188 goto err;
3e10a15f
JL		 189 }
190
355da1eb
SW		 191 inode->i_mode = parent->i_mode;
192 inode->i_uid = parent->i_uid;
193 inode->i_gid = parent->i_gid;
c453bdb5 194 inode_set_mtime_to_ts(inode, inode_get_mtime(parent));
7795aef0 195 inode_set_ctime_to_ts(inode, inode_get_ctime(parent));
c453bdb5 196 inode_set_atime_to_ts(inode, inode_get_atime(parent));
b377ff13 197 ci->i_rbytes = 0;
ef915725 198 ci->i_btime = ceph_inode(parent)->i_btime;
893e456b 199
dd66df00
LH		 200#ifdef CONFIG_FS_ENCRYPTION
201 /* if encrypted, just borrow fscrypt_auth from parent */
202 if (IS_ENCRYPTED(parent)) {
203 struct ceph_inode_info *pci = ceph_inode(parent);
204
205 ci->fscrypt_auth = kmemdup(pci->fscrypt_auth,
206 pci->fscrypt_auth_len,
207 GFP_KERNEL);
208 if (ci->fscrypt_auth) {
209 inode->i_flags |= S_ENCRYPTED;
210 ci->fscrypt_auth_len = pci->fscrypt_auth_len;
211 } else {
38d46409 212 doutc(cl, "Failed to alloc snapdir fscrypt_auth\n");
dd66df00
LH		 213 ret = -ENOMEM;
214 goto err;
215 }
216 }
217#endif
d3c51ae1
JL		 218 if (inode->i_state & I_NEW) {
219 inode->i_op = &ceph_snapdir_iops;
220 inode->i_fop = &ceph_snapdir_fops;
221 ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */
893e456b 222 unlock_new_inode(inode);
d3c51ae1 223 }
893e456b 224
355da1eb 225 return inode;
322794d3
XL		 226err:
227 if ((inode->i_state & I_NEW))
228 discard_new_inode(inode);
229 else
230 iput(inode);
dd66df00 231 return ERR_PTR(ret);
355da1eb
SW		 232}
233
234const struct inode_operations ceph_file_iops = {
235 .permission = ceph_permission,
236 .setattr = ceph_setattr,
237 .getattr = ceph_getattr,
355da1eb 238 .listxattr = ceph_listxattr,
cac2f8b8 239 .get_inode_acl = ceph_get_acl,
72466d0b 240 .set_acl = ceph_set_acl,
355da1eb
SW		 241};
242
243
244/*
245 * We use a 'frag tree' to keep track of the MDS's directory fragments
246 * for a given inode (usually there is just a single fragment). We
247 * need to know when a child frag is delegated to a new MDS, or when
248 * it is flagged as replicated, so we can direct our requests
249 * accordingly.
250 */
251
252/*
253 * find/create a frag in the tree
254 */
255static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci,
256 u32 f)
257{
38d46409
XL		 258 struct inode *inode = &ci->netfs.inode;
259 struct ceph_client *cl = ceph_inode_to_client(inode);
355da1eb
SW		 260 struct rb_node **p;
261 struct rb_node *parent = NULL;
262 struct ceph_inode_frag *frag;
263 int c;
264
265 p = &ci->i_fragtree.rb_node;
266 while (*p) {
267 parent = *p;
268 frag = rb_entry(parent, struct ceph_inode_frag, node);
269 c = ceph_frag_compare(f, frag->frag);
270 if (c < 0)
271 p = &(*p)->rb_left;
272 else if (c > 0)
273 p = &(*p)->rb_right;
274 else
275 return frag;
276 }
277
278 frag = kmalloc(sizeof(*frag), GFP_NOFS);
51308806 279 if (!frag)
355da1eb 280 return ERR_PTR(-ENOMEM);
51308806 281
355da1eb
SW		 282 frag->frag = f;
283 frag->split_by = 0;
284 frag->mds = -1;
285 frag->ndist = 0;
286
287 rb_link_node(&frag->node, parent, p);
288 rb_insert_color(&frag->node, &ci->i_fragtree);
289
38d46409 290 doutc(cl, "added %p %llx.%llx frag %x\n", inode, ceph_vinop(inode), f);
355da1eb
SW		 291 return frag;
292}
293
294/*
295 * find a specific frag @f
296 */
297struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f)
298{
299 struct rb_node *n = ci->i_fragtree.rb_node;
300
301 while (n) {
302 struct ceph_inode_frag *frag =
303 rb_entry(n, struct ceph_inode_frag, node);
304 int c = ceph_frag_compare(f, frag->frag);
305 if (c < 0)
306 n = n->rb_left;
307 else if (c > 0)
308 n = n->rb_right;
309 else
310 return frag;
311 }
312 return NULL;
313}
314
315/*
316 * Choose frag containing the given value @v. If @pfrag is
317 * specified, copy the frag delegation info to the caller if
318 * it is present.
319 */
3e7fbe9c
YZ		 320static u32 __ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
321 struct ceph_inode_frag *pfrag, int *found)
355da1eb 322{
38d46409 323 struct ceph_client *cl = ceph_inode_to_client(&ci->netfs.inode);
355da1eb
SW		 324 u32 t = ceph_frag_make(0, 0);
325 struct ceph_inode_frag *frag;
326 unsigned nway, i;
327 u32 n;
328
329 if (found)
330 *found = 0;
331
355da1eb
SW		 332 while (1) {
333 WARN_ON(!ceph_frag_contains_value(t, v));
334 frag = __ceph_find_frag(ci, t);
335 if (!frag)
336 break; /* t is a leaf */
337 if (frag->split_by == 0) {
338 if (pfrag)
339 memcpy(pfrag, frag, sizeof(*pfrag));
340 if (found)
341 *found = 1;
342 break;
343 }
344
345 /* choose child */
346 nway = 1 << frag->split_by;
38d46409
XL		 347 doutc(cl, "frag(%x) %x splits by %d (%d ways)\n", v, t,
348 frag->split_by, nway);
355da1eb
SW		 349 for (i = 0; i < nway; i++) {
350 n = ceph_frag_make_child(t, frag->split_by, i);
351 if (ceph_frag_contains_value(n, v)) {
352 t = n;
353 break;
354 }
355 }
356 BUG_ON(i == nway);
357 }
38d46409 358 doutc(cl, "frag(%x) = %x\n", v, t);
355da1eb 359
355da1eb
SW		 360 return t;
361}
362
3e7fbe9c
YZ		 363u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
364 struct ceph_inode_frag *pfrag, int *found)
365{
366 u32 ret;
367 mutex_lock(&ci->i_fragtree_mutex);
368 ret = __ceph_choose_frag(ci, v, pfrag, found);
369 mutex_unlock(&ci->i_fragtree_mutex);
370 return ret;
371}
372
355da1eb
SW		 373/*
374 * Process dirfrag (delegation) info from the mds. Include leaf
375 * fragment in tree ONLY if ndist > 0. Otherwise, only
376 * branches/splits are included in i_fragtree)
377 */
378static int ceph_fill_dirfrag(struct inode *inode,
379 struct ceph_mds_reply_dirfrag *dirinfo)
380{
381 struct ceph_inode_info *ci = ceph_inode(inode);
38d46409 382 struct ceph_client *cl = ceph_inode_to_client(inode);
355da1eb
SW		 383 struct ceph_inode_frag *frag;
384 u32 id = le32_to_cpu(dirinfo->frag);
385 int mds = le32_to_cpu(dirinfo->auth);
386 int ndist = le32_to_cpu(dirinfo->ndist);
8d08503c 387 int diri_auth = -1;
355da1eb
SW		 388 int i;
389 int err = 0;
390
8d08503c
YZ		 391 spin_lock(&ci->i_ceph_lock);
392 if (ci->i_auth_cap)
393 diri_auth = ci->i_auth_cap->mds;
394 spin_unlock(&ci->i_ceph_lock);
395
42172119
YZ		 396 if (mds == -1) /* CDIR_AUTH_PARENT */
397 mds = diri_auth;
398
355da1eb 399 mutex_lock(&ci->i_fragtree_mutex);
8d08503c 400 if (ndist == 0 && mds == diri_auth) {
355da1eb
SW		 401 /* no delegation info needed. */
402 frag = __ceph_find_frag(ci, id);
403 if (!frag)
404 goto out;
405 if (frag->split_by == 0) {
406 /* tree leaf, remove */
38d46409
XL		 407 doutc(cl, "removed %p %llx.%llx frag %x (no ref)\n",
408 inode, ceph_vinop(inode), id);
355da1eb
SW		 409 rb_erase(&frag->node, &ci->i_fragtree);
410 kfree(frag);
411 } else {
412 /* tree branch, keep and clear */
38d46409
XL		 413 doutc(cl, "cleared %p %llx.%llx frag %x referral\n",
414 inode, ceph_vinop(inode), id);
355da1eb
SW		 415 frag->mds = -1;
416 frag->ndist = 0;
417 }
418 goto out;
419 }
420
421
422 /* find/add this frag to store mds delegation info */
423 frag = __get_or_create_frag(ci, id);
424 if (IS_ERR(frag)) {
425 /* this is not the end of the world; we can continue
426 with bad/inaccurate delegation info */
38d46409
XL		 427 pr_err_client(cl, "ENOMEM on mds ref %p %llx.%llx fg %x\n",
428 inode, ceph_vinop(inode),
429 le32_to_cpu(dirinfo->frag));
355da1eb
SW		 430 err = -ENOMEM;
431 goto out;
432 }
433
434 frag->mds = mds;
435 frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP);
436 for (i = 0; i < frag->ndist; i++)
437 frag->dist[i] = le32_to_cpu(dirinfo->dist[i]);
38d46409
XL		 438 doutc(cl, "%p %llx.%llx frag %x ndist=%d\n", inode,
439 ceph_vinop(inode), frag->frag, frag->ndist);
355da1eb
SW		 440
441out:
442 mutex_unlock(&ci->i_fragtree_mutex);
443 return err;
444}
445
a407846e
YZ		 446static int frag_tree_split_cmp(const void *l, const void *r)
447{
448 struct ceph_frag_tree_split *ls = (struct ceph_frag_tree_split*)l;
449 struct ceph_frag_tree_split *rs = (struct ceph_frag_tree_split*)r;
fe2ed425
JL		 450 return ceph_frag_compare(le32_to_cpu(ls->frag),
451 le32_to_cpu(rs->frag));
a407846e
YZ		 452}
453
a4b7431f
YZ		 454static bool is_frag_child(u32 f, struct ceph_inode_frag *frag)
455{
456 if (!frag)
457 return f == ceph_frag_make(0, 0);
458 if (ceph_frag_bits(f) != ceph_frag_bits(frag->frag) + frag->split_by)
459 return false;
460 return ceph_frag_contains_value(frag->frag, ceph_frag_value(f));
461}
462
3e7fbe9c
YZ		 463static int ceph_fill_fragtree(struct inode *inode,
464 struct ceph_frag_tree_head *fragtree,
465 struct ceph_mds_reply_dirfrag *dirinfo)
466{
38d46409 467 struct ceph_client *cl = ceph_inode_to_client(inode);
3e7fbe9c 468 struct ceph_inode_info *ci = ceph_inode(inode);
a4b7431f 469 struct ceph_inode_frag *frag, *prev_frag = NULL;
3e7fbe9c 470 struct rb_node *rb_node;
1b1bc16d
YZ		 471 unsigned i, split_by, nsplits;
472 u32 id;
3e7fbe9c
YZ		 473 bool update = false;
474
475 mutex_lock(&ci->i_fragtree_mutex);
476 nsplits = le32_to_cpu(fragtree->nsplits);
1b1bc16d
YZ		 477 if (nsplits != ci->i_fragtree_nsplits) {
478 update = true;
479 } else if (nsplits) {
8032bf12 480 i = get_random_u32_below(nsplits);
3e7fbe9c
YZ		 481 id = le32_to_cpu(fragtree->splits[i].frag);
482 if (!__ceph_find_frag(ci, id))
483 update = true;
484 } else if (!RB_EMPTY_ROOT(&ci->i_fragtree)) {
485 rb_node = rb_first(&ci->i_fragtree);
486 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
487 if (frag->frag != ceph_frag_make(0, 0) || rb_next(rb_node))
488 update = true;
489 }
490 if (!update && dirinfo) {
491 id = le32_to_cpu(dirinfo->frag);
492 if (id != __ceph_choose_frag(ci, id, NULL, NULL))
493 update = true;
494 }
495 if (!update)
496 goto out_unlock;
497
a407846e
YZ		 498 if (nsplits > 1) {
499 sort(fragtree->splits, nsplits, sizeof(fragtree->splits[0]),
500 frag_tree_split_cmp, NULL);
501 }
502
38d46409 503 doutc(cl, "%p %llx.%llx\n", inode, ceph_vinop(inode));
3e7fbe9c
YZ		 504 rb_node = rb_first(&ci->i_fragtree);
505 for (i = 0; i < nsplits; i++) {
506 id = le32_to_cpu(fragtree->splits[i].frag);
1b1bc16d
YZ		 507 split_by = le32_to_cpu(fragtree->splits[i].by);
508 if (split_by == 0 || ceph_frag_bits(id) + split_by > 24) {
38d46409
XL		 509 pr_err_client(cl, "%p %llx.%llx invalid split %d/%u, "
510 "frag %x split by %d\n", inode,
511 ceph_vinop(inode), i, nsplits, id, split_by);
1b1bc16d
YZ		 512 continue;
513 }
3e7fbe9c
YZ		 514 frag = NULL;
515 while (rb_node) {
516 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
517 if (ceph_frag_compare(frag->frag, id) >= 0) {
518 if (frag->frag != id)
519 frag = NULL;
520 else
521 rb_node = rb_next(rb_node);
522 break;
523 }
524 rb_node = rb_next(rb_node);
a4b7431f
YZ		 525 /* delete stale split/leaf node */
526 if (frag->split_by > 0 ||
527 !is_frag_child(frag->frag, prev_frag)) {
528 rb_erase(&frag->node, &ci->i_fragtree);
1b1bc16d
YZ		 529 if (frag->split_by > 0)
530 ci->i_fragtree_nsplits--;
a4b7431f
YZ		 531 kfree(frag);
532 }
3e7fbe9c
YZ		 533 frag = NULL;
534 }
535 if (!frag) {
536 frag = __get_or_create_frag(ci, id);
537 if (IS_ERR(frag))
538 continue;
539 }
1b1bc16d
YZ		 540 if (frag->split_by == 0)
541 ci->i_fragtree_nsplits++;
542 frag->split_by = split_by;
38d46409 543 doutc(cl, " frag %x split by %d\n", frag->frag, frag->split_by);
a4b7431f 544 prev_frag = frag;
3e7fbe9c
YZ		 545 }
546 while (rb_node) {
547 frag = rb_entry(rb_node, struct ceph_inode_frag, node);
548 rb_node = rb_next(rb_node);
a4b7431f
YZ		 549 /* delete stale split/leaf node */
550 if (frag->split_by > 0 ||
551 !is_frag_child(frag->frag, prev_frag)) {
552 rb_erase(&frag->node, &ci->i_fragtree);
1b1bc16d
YZ		 553 if (frag->split_by > 0)
554 ci->i_fragtree_nsplits--;
a4b7431f
YZ		 555 kfree(frag);
556 }
3e7fbe9c
YZ		 557 }
558out_unlock:
559 mutex_unlock(&ci->i_fragtree_mutex);
560 return 0;
561}
355da1eb
SW		 562
563/*
564 * initialize a newly allocated inode.
565 */
566struct inode *ceph_alloc_inode(struct super_block *sb)
567{
38d46409 568 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(sb);
355da1eb
SW		 569 struct ceph_inode_info *ci;
570 int i;
571
fd60b288 572 ci = alloc_inode_sb(sb, ceph_inode_cachep, GFP_NOFS);
355da1eb
SW		 573 if (!ci)
574 return NULL;
575
38d46409 576 doutc(fsc->client, "%p\n", &ci->netfs.inode);
355da1eb 577
bc899ee1 578 /* Set parameters for the netfs library */
100ccd18 579 netfs_inode_init(&ci->netfs, &ceph_netfs_ops, false);
bc899ee1 580
be655596
SW		 581 spin_lock_init(&ci->i_ceph_lock);
582
355da1eb 583 ci->i_version = 0;
31c542a1 584 ci->i_inline_version = 0;
355da1eb
SW		 585 ci->i_time_warp_seq = 0;
586 ci->i_ceph_flags = 0;
fdd4e158
YZ		 587 atomic64_set(&ci->i_ordered_count, 1);
588 atomic64_set(&ci->i_release_count, 1);
589 atomic64_set(&ci->i_complete_seq[0], 0);
590 atomic64_set(&ci->i_complete_seq[1], 0);
355da1eb
SW		 591 ci->i_symlink = NULL;
592
fb18a575
LH		 593 ci->i_max_bytes = 0;
594 ci->i_max_files = 0;
595
6c0f3af7 596 memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout));
785892fe 597 memset(&ci->i_cached_layout, 0, sizeof(ci->i_cached_layout));
30c156d9 598 RCU_INIT_POINTER(ci->i_layout.pool_ns, NULL);
6c0f3af7 599
355da1eb
SW		 600 ci->i_fragtree = RB_ROOT;
601 mutex_init(&ci->i_fragtree_mutex);
602
603 ci->i_xattrs.blob = NULL;
604 ci->i_xattrs.prealloc_blob = NULL;
605 ci->i_xattrs.dirty = false;
606 ci->i_xattrs.index = RB_ROOT;
607 ci->i_xattrs.count = 0;
608 ci->i_xattrs.names_size = 0;
609 ci->i_xattrs.vals_size = 0;
610 ci->i_xattrs.version = 0;
611 ci->i_xattrs.index_version = 0;
612
613 ci->i_caps = RB_ROOT;
614 ci->i_auth_cap = NULL;
615 ci->i_dirty_caps = 0;
616 ci->i_flushing_caps = 0;
617 INIT_LIST_HEAD(&ci->i_dirty_item);
618 INIT_LIST_HEAD(&ci->i_flushing_item);
f66fd9f0 619 ci->i_prealloc_cap_flush = NULL;
e4500b5e 620 INIT_LIST_HEAD(&ci->i_cap_flush_list);
355da1eb 621 init_waitqueue_head(&ci->i_cap_wq);
355da1eb
SW		 622 ci->i_hold_caps_max = 0;
623 INIT_LIST_HEAD(&ci->i_cap_delay_list);
355da1eb
SW		 624 INIT_LIST_HEAD(&ci->i_cap_snaps);
625 ci->i_head_snapc = NULL;
626 ci->i_snap_caps = 0;
627
719a2514 628 ci->i_last_rd = ci->i_last_wr = jiffies - 3600 * HZ;
774a6a11 629 for (i = 0; i < CEPH_FILE_MODE_BITS; i++)
355da1eb
SW		 630 ci->i_nr_by_mode[i] = 0;
631
b0d7c223 632 mutex_init(&ci->i_truncate_mutex);
355da1eb
SW		 633 ci->i_truncate_seq = 0;
634 ci->i_truncate_size = 0;
635 ci->i_truncate_pending = 0;
5c64737d 636 ci->i_truncate_pagecache_size = 0;
355da1eb
SW		 637
638 ci->i_max_size = 0;
639 ci->i_reported_size = 0;
640 ci->i_wanted_max_size = 0;
641 ci->i_requested_max_size = 0;
642
643 ci->i_pin_ref = 0;
644 ci->i_rd_ref = 0;
645 ci->i_rdcache_ref = 0;
646 ci->i_wr_ref = 0;
d3d0720d 647 ci->i_wb_ref = 0;
f85122af 648 ci->i_fx_ref = 0;
355da1eb
SW		 649 ci->i_wrbuffer_ref = 0;
650 ci->i_wrbuffer_ref_head = 0;
89aa5930 651 atomic_set(&ci->i_filelock_ref, 0);
1e9c2eb6 652 atomic_set(&ci->i_shared_gen, 1);
355da1eb
SW		 653 ci->i_rdcache_gen = 0;
654 ci->i_rdcache_revoking = 0;
655
355da1eb 656 INIT_LIST_HEAD(&ci->i_unsafe_dirops);
68cd5b4b 657 INIT_LIST_HEAD(&ci->i_unsafe_iops);
355da1eb
SW		 658 spin_lock_init(&ci->i_unsafe_lock);
659
660 ci->i_snap_realm = NULL;
661 INIT_LIST_HEAD(&ci->i_snap_realm_item);
662 INIT_LIST_HEAD(&ci->i_snap_flush_item);
663
1cf89a8d
YZ		 664 INIT_WORK(&ci->i_work, ceph_inode_work);
665 ci->i_work_mask = 0;
245ce991 666 memset(&ci->i_btime, '\0', sizeof(ci->i_btime));
2d332d5b
JL		 667#ifdef CONFIG_FS_ENCRYPTION
668 ci->fscrypt_auth = NULL;
669 ci->fscrypt_auth_len = 0;
670#endif
874c8ca1 671 return &ci->netfs.inode;
355da1eb
SW		 672}
673
cfa6d412 674void ceph_free_inode(struct inode *inode)
fa0d7e3d 675{
fa0d7e3d
NP		 676 struct ceph_inode_info *ci = ceph_inode(inode);
677
daf5cc27 678 kfree(ci->i_symlink);
2d332d5b
JL		 679#ifdef CONFIG_FS_ENCRYPTION
680 kfree(ci->fscrypt_auth);
681#endif
79f2f6ad 682 fscrypt_free_inode(inode);
fa0d7e3d
NP		 683 kmem_cache_free(ceph_inode_cachep, ci);
684}
685
87bc5b89 686void ceph_evict_inode(struct inode *inode)
355da1eb
SW		 687{
688 struct ceph_inode_info *ci = ceph_inode(inode);
1dd8d470 689 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb);
38d46409 690 struct ceph_client *cl = ceph_inode_to_client(inode);
355da1eb
SW		 691 struct ceph_inode_frag *frag;
692 struct rb_node *n;
693
38d46409 694 doutc(cl, "%p ino %llx.%llx\n", inode, ceph_vinop(inode));
87bc5b89 695
1dd8d470
XL		 696 percpu_counter_dec(&mdsc->metric.total_inodes);
697
87bc5b89 698 truncate_inode_pages_final(&inode->i_data);
c9c4ff12 699 if (inode->i_state & I_PINNING_NETFS_WB)
400e1286 700 ceph_fscache_unuse_cookie(inode, true);
87bc5b89 701 clear_inode(inode);
355da1eb 702
99ccbd22 703 ceph_fscache_unregister_inode_cookie(ci);
2d332d5b 704 fscrypt_put_encryption_info(inode);
99ccbd22 705
d6e47819 706 __ceph_remove_caps(ci);
355da1eb 707
55ab5520 708 if (__ceph_has_quota(ci, QUOTA_GET_ANY))
d557c48d
LH		 709 ceph_adjust_quota_realms_count(inode, false);
710
8b218b8a
SW		 711 /*
712 * we may still have a snap_realm reference if there are stray
d9df2783 713 * caps in i_snap_caps.
8b218b8a
SW		 714 */
715 if (ci->i_snap_realm) {
75c9627e 716 if (ceph_snap(inode) == CEPH_NOSNAP) {
38d46409
XL		 717 doutc(cl, " dropping residual ref to snap realm %p\n",
718 ci->i_snap_realm);
0ba92e1c 719 ceph_change_snap_realm(inode, NULL);
75c9627e
YZ		 720 } else {
721 ceph_put_snapid_map(mdsc, ci->i_snapid_map);
722 ci->i_snap_realm = NULL;
723 }
8b218b8a
SW		 724 }
725
355da1eb
SW		 726 while ((n = rb_first(&ci->i_fragtree)) != NULL) {
727 frag = rb_entry(n, struct ceph_inode_frag, node);
728 rb_erase(n, &ci->i_fragtree);
729 kfree(frag);
730 }
1b1bc16d 731 ci->i_fragtree_nsplits = 0;
355da1eb
SW		 732
733 __ceph_destroy_xattrs(ci);
b6c1d5b8
SW		 734 if (ci->i_xattrs.blob)
735 ceph_buffer_put(ci->i_xattrs.blob);
736 if (ci->i_xattrs.prealloc_blob)
737 ceph_buffer_put(ci->i_xattrs.prealloc_blob);
355da1eb 738
779fe0fb 739 ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns));
785892fe 740 ceph_put_string(rcu_dereference_raw(ci->i_cached_layout.pool_ns));
355da1eb
SW		 741}
742
224a7542
YZ		 743static inline blkcnt_t calc_inode_blocks(u64 size)
744{
745 return (size + (1<<9) - 1) >> 9;
746}
747
355da1eb
SW		 748/*
749 * Helpers to fill in size, ctime, mtime, and atime. We have to be
750 * careful because either the client or MDS may have more up to date
751 * info, depending on which capabilities are held, and whether
752 * time_warp_seq or truncate_seq have increased. (Ordinarily, mtime
753 * and size are monotonically increasing, except when utimes() or
754 * truncate() increments the corresponding _seq values.)
755 */
756int ceph_fill_file_size(struct inode *inode, int issued,
757 u32 truncate_seq, u64 truncate_size, u64 size)
758{
38d46409 759 struct ceph_client *cl = ceph_inode_to_client(inode);
355da1eb
SW		 760 struct ceph_inode_info *ci = ceph_inode(inode);
761 int queue_trunc = 0;
2d6795fb 762 loff_t isize = i_size_read(inode);
355da1eb
SW		 763
764 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 ||
2d6795fb 765 (truncate_seq == ci->i_truncate_seq && size > isize)) {
38d46409 766 doutc(cl, "size %lld -> %llu\n", isize, size);
a3d714c3 767 if (size > 0 && S_ISDIR(inode->i_mode)) {
38d46409 768 pr_err_client(cl, "non-zero size for directory\n");
a3d714c3
YZ		 769 size = 0;
770 }
99c88e69 771 i_size_write(inode, size);
224a7542 772 inode->i_blocks = calc_inode_blocks(size);
400e1286
JL		 773 /*
774 * If we're expanding, then we should be able to just update
775 * the existing cookie.
776 */
777 if (size > isize)
778 ceph_fscache_update(inode);
355da1eb
SW		 779 ci->i_reported_size = size;
780 if (truncate_seq != ci->i_truncate_seq) {
38d46409
XL		 781 doutc(cl, "truncate_seq %u -> %u\n",
782 ci->i_truncate_seq, truncate_seq);
355da1eb 783 ci->i_truncate_seq = truncate_seq;
b0d7c223
YZ		 784
785 /* the MDS should have revoked these caps */
15c0a870 786 WARN_ON_ONCE(issued & (CEPH_CAP_FILE_RD |
b0d7c223 787 CEPH_CAP_FILE_LAZYIO));
3d497d85
YS		 788 /*
789 * If we hold relevant caps, or in the case where we're
790 * not the only client referencing this file and we
791 * don't hold those caps, then we need to check whether
792 * the file is either opened or mmaped
793 */
b0d7c223
YZ		 794 if ((issued & (CEPH_CAP_FILE_CACHE|
795 CEPH_CAP_FILE_BUFFER)) ||
3d497d85 796 mapping_mapped(inode->i_mapping) ||
719a2514 797 __ceph_is_file_opened(ci)) {
355da1eb
SW		 798 ci->i_truncate_pending++;
799 queue_trunc = 1;
800 }
801 }
802 }
295fc4aa
XL		 803
804 /*
805 * It's possible that the new sizes of the two consecutive
806 * size truncations will be in the same fscrypt last block,
807 * and we need to truncate the corresponding page caches
808 * anyway.
809 */
810 if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0) {
38d46409
XL		 811 doutc(cl, "truncate_size %lld -> %llu, encrypted %d\n",
812 ci->i_truncate_size, truncate_size,
813 !!IS_ENCRYPTED(inode));
295fc4aa 814
355da1eb 815 ci->i_truncate_size = truncate_size;
295fc4aa
XL		 816
817 if (IS_ENCRYPTED(inode)) {
38d46409
XL		 818 doutc(cl, "truncate_pagecache_size %lld -> %llu\n",
819 ci->i_truncate_pagecache_size, size);
5c64737d 820 ci->i_truncate_pagecache_size = size;
295fc4aa 821 } else {
5c64737d 822 ci->i_truncate_pagecache_size = truncate_size;
295fc4aa 823 }
355da1eb
SW		 824 }
825 return queue_trunc;
826}
827
828void ceph_fill_file_time(struct inode *inode, int issued,
9bbeab41
AB		 829 u64 time_warp_seq, struct timespec64 *ctime,
830 struct timespec64 *mtime, struct timespec64 *atime)
355da1eb 831{
38d46409 832 struct ceph_client *cl = ceph_inode_to_client(inode);
355da1eb 833 struct ceph_inode_info *ci = ceph_inode(inode);
7795aef0 834 struct timespec64 ictime = inode_get_ctime(inode);
355da1eb
SW		 835 int warn = 0;
836
837 if (issued & (CEPH_CAP_FILE_EXCL|
838 CEPH_CAP_FILE_WR|
d8672d64
SW		 839 CEPH_CAP_FILE_BUFFER|
840 CEPH_CAP_AUTH_EXCL|
841 CEPH_CAP_XATTR_EXCL)) {
ffdeec7a 842 if (ci->i_version == 0 ||
7795aef0 843 timespec64_compare(ctime, &ictime) > 0) {
38d46409 844 doutc(cl, "ctime %lld.%09ld -> %lld.%09ld inc w/ cap\n",
7795aef0 845 ictime.tv_sec, ictime.tv_nsec,
9bbeab41 846 ctime->tv_sec, ctime->tv_nsec);
7795aef0 847 inode_set_ctime_to_ts(inode, *ctime);
355da1eb 848 }
ffdeec7a
YZ		 849 if (ci->i_version == 0 ||
850 ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) {
355da1eb 851 /* the MDS did a utimes() */
38d46409 852 doutc(cl, "mtime %lld.%09ld -> %lld.%09ld tw %d -> %d\n",
c453bdb5
JL		 853 inode_get_mtime_sec(inode),
854 inode_get_mtime_nsec(inode),
9bbeab41 855 mtime->tv_sec, mtime->tv_nsec,
355da1eb
SW		 856 ci->i_time_warp_seq, (int)time_warp_seq);
857
c453bdb5
JL		 858 inode_set_mtime_to_ts(inode, *mtime);
859 inode_set_atime_to_ts(inode, *atime);
355da1eb
SW		 860 ci->i_time_warp_seq = time_warp_seq;
861 } else if (time_warp_seq == ci->i_time_warp_seq) {
c453bdb5
JL		 862 struct timespec64 ts;
863
355da1eb 864 /* nobody did utimes(); take the max */
c453bdb5
JL		 865 ts = inode_get_mtime(inode);
866 if (timespec64_compare(mtime, &ts) > 0) {
38d46409 867 doutc(cl, "mtime %lld.%09ld -> %lld.%09ld inc\n",
c453bdb5 868 ts.tv_sec, ts.tv_nsec,
9bbeab41 869 mtime->tv_sec, mtime->tv_nsec);
c453bdb5 870 inode_set_mtime_to_ts(inode, *mtime);
355da1eb 871 }
c453bdb5
JL		 872 ts = inode_get_atime(inode);
873 if (timespec64_compare(atime, &ts) > 0) {
38d46409 874 doutc(cl, "atime %lld.%09ld -> %lld.%09ld inc\n",
c453bdb5 875 ts.tv_sec, ts.tv_nsec,
9bbeab41 876 atime->tv_sec, atime->tv_nsec);
c453bdb5 877 inode_set_atime_to_ts(inode, *atime);
355da1eb
SW		 878 }
879 } else if (issued & CEPH_CAP_FILE_EXCL) {
880 /* we did a utimes(); ignore mds values */
881 } else {
882 warn = 1;
883 }
884 } else {
d8672d64 885 /* we have no write|excl caps; whatever the MDS says is true */
355da1eb 886 if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) {
7795aef0 887 inode_set_ctime_to_ts(inode, *ctime);
c453bdb5
JL		 888 inode_set_mtime_to_ts(inode, *mtime);
889 inode_set_atime_to_ts(inode, *atime);
355da1eb
SW		 890 ci->i_time_warp_seq = time_warp_seq;
891 } else {
892 warn = 1;
893 }
894 }
895 if (warn) /* time_warp_seq shouldn't go backwards */
38d46409
XL		 896 doutc(cl, "%p mds time_warp_seq %llu < %u\n", inode,
897 time_warp_seq, ci->i_time_warp_seq);
355da1eb
SW		 898}
899
79f2f6ad 900#if IS_ENABLED(CONFIG_FS_ENCRYPTION)
38d46409
XL		 901static int decode_encrypted_symlink(struct ceph_mds_client *mdsc,
902 const char *encsym,
903 int enclen, u8 **decsym)
79f2f6ad 904{
38d46409 905 struct ceph_client *cl = mdsc->fsc->client;
79f2f6ad
JL		 906 int declen;
907 u8 *sym;
908
909 sym = kmalloc(enclen + 1, GFP_NOFS);
910 if (!sym)
911 return -ENOMEM;
912
913 declen = ceph_base64_decode(encsym, enclen, sym);
914 if (declen < 0) {
38d46409
XL		 915 pr_err_client(cl,
916 "can't decode symlink (%d). Content: %.*s\n",
917 declen, enclen, encsym);
79f2f6ad
JL		 918 kfree(sym);
919 return -EIO;
920 }
921 sym[declen + 1] = '\0';
922 *decsym = sym;
923 return declen;
924}
925#else
38d46409
XL		 926static int decode_encrypted_symlink(struct ceph_mds_client *mdsc,
927 const char *encsym,
928 int symlen, u8 **decsym)
79f2f6ad
JL		 929{
930 return -EOPNOTSUPP;
931}
932#endif
933
355da1eb
SW		 934/*
935 * Populate an inode based on info from mds. May be called on new or
936 * existing inodes.
937 */
966c7160
JL		 938int ceph_fill_inode(struct inode *inode, struct page *locked_page,
939 struct ceph_mds_reply_info_in *iinfo,
940 struct ceph_mds_reply_dirfrag *dirinfo,
941 struct ceph_mds_session *session, int cap_fmode,
942 struct ceph_cap_reservation *caps_reservation)
355da1eb 943{
2678da88 944 struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb);
38d46409 945 struct ceph_client *cl = mdsc->fsc->client;
355da1eb
SW		 946 struct ceph_mds_reply_inode *info = iinfo->in;
947 struct ceph_inode_info *ci = ceph_inode(inode);
2af54a72 948 int issued, new_issued, info_caps;
9bbeab41 949 struct timespec64 mtime, atime, ctime;
355da1eb 950 struct ceph_buffer *xattr_blob = NULL;
af8a85a4 951 struct ceph_buffer *old_blob = NULL;
779fe0fb 952 struct ceph_string *pool_ns = NULL;
d9df2783 953 struct ceph_cap *new_cap = NULL;
355da1eb 954 int err = 0;
d9df2783 955 bool wake = false;
f98a128a
YZ		 956 bool queue_trunc = false;
957 bool new_version = false;
31c542a1 958 bool fill_inline = false;
ed94f87c
JL		 959 umode_t mode = le32_to_cpu(info->mode);
960 dev_t rdev = le32_to_cpu(info->rdev);
355da1eb 961
27171ae6
JL		 962 lockdep_assert_held(&mdsc->snap_rwsem);
963
38d46409
XL		 964 doutc(cl, "%p ino %llx.%llx v %llu had %llu\n", inode, ceph_vinop(inode),
965 le64_to_cpu(info->version), ci->i_version);
355da1eb 966
ed94f87c
JL		 967 /* Once I_NEW is cleared, we can't change type or dev numbers */
968 if (inode->i_state & I_NEW) {
969 inode->i_mode = mode;
970 } else {
971 if (inode_wrong_type(inode, mode)) {
38d46409
XL		 972 pr_warn_once_client(cl,
973 "inode type changed! (ino %llx.%llx is 0%o, mds says 0%o)\n",
974 ceph_vinop(inode), inode->i_mode, mode);
ed94f87c
JL		 975 return -ESTALE;
976 }
977
978 if ((S_ISCHR(mode) || S_ISBLK(mode)) && inode->i_rdev != rdev) {
38d46409
XL		 979 pr_warn_once_client(cl,
980 "dev inode rdev changed! (ino %llx.%llx is %u:%u, mds says %u:%u)\n",
981 ceph_vinop(inode), MAJOR(inode->i_rdev),
982 MINOR(inode->i_rdev), MAJOR(rdev),
983 MINOR(rdev));
ed94f87c
JL		 984 return -ESTALE;
985 }
986 }
987
2af54a72
YZ		 988 info_caps = le32_to_cpu(info->cap.caps);
989
d9df2783 990 /* prealloc new cap struct */
9a6bed4f 991 if (info_caps && ceph_snap(inode) == CEPH_NOSNAP) {
d9df2783 992 new_cap = ceph_get_cap(mdsc, caps_reservation);
9a6bed4f
JL		 993 if (!new_cap)
994 return -ENOMEM;
995 }
d9df2783 996
355da1eb
SW		 997 /*
998 * prealloc xattr data, if it looks like we'll need it. only
999 * if len > 4 (meaning there are actually xattrs; the first 4
1000 * bytes are the xattr count).
1001 */
1002 if (iinfo->xattr_len > 4) {
b6c1d5b8 1003 xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS);
355da1eb 1004 if (!xattr_blob)
38d46409
XL		 1005 pr_err_client(cl, "ENOMEM xattr blob %d bytes\n",
1006 iinfo->xattr_len);
355da1eb
SW		 1007 }
1008
779fe0fb
YZ		 1009 if (iinfo->pool_ns_len > 0)
1010 pool_ns = ceph_find_or_create_string(iinfo->pool_ns_data,
1011 iinfo->pool_ns_len);
1012
75c9627e
YZ		 1013 if (ceph_snap(inode) != CEPH_NOSNAP && !ci->i_snapid_map)
1014 ci->i_snapid_map = ceph_get_snapid_map(mdsc, ceph_snap(inode));
1015
be655596 1016 spin_lock(&ci->i_ceph_lock);
355da1eb
SW		 1017
1018 /*
1019 * provided version will be odd if inode value is projected,
8bd59e01
SW		 1020 * even if stable. skip the update if we have newer stable
1021 * info (ours>=theirs, e.g. due to racing mds replies), unless
1022 * we are getting projected (unstable) info (in which case the
1023 * version is odd, and we want ours>theirs).
1024 * us them
1025 * 2 2 skip
1026 * 3 2 skip
1027 * 3 3 update
355da1eb 1028 */
f98a128a
YZ		 1029 if (ci->i_version == 0 ||
1030 ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
1031 le64_to_cpu(info->version) > (ci->i_version & ~1)))
1032 new_version = true;
1033
a35ead31
JL		 1034 /* Update change_attribute */
1035 inode_set_max_iversion_raw(inode, iinfo->change_attr);
1036
2af54a72
YZ		 1037 __ceph_caps_issued(ci, &issued);
1038 issued |= __ceph_caps_dirty(ci);
1039 new_issued = ~issued & info_caps;
355da1eb 1040
d557c48d 1041 __ceph_update_quota(ci, iinfo->max_bytes, iinfo->max_files);
fb18a575 1042
2d332d5b 1043#ifdef CONFIG_FS_ENCRYPTION
e127e030
LH		 1044 if (iinfo->fscrypt_auth_len &&
1045 ((inode->i_state & I_NEW) || (ci->fscrypt_auth_len == 0))) {
2d332d5b
JL		 1046 kfree(ci->fscrypt_auth);
1047 ci->fscrypt_auth_len = iinfo->fscrypt_auth_len;
1048 ci->fscrypt_auth = iinfo->fscrypt_auth;
1049 iinfo->fscrypt_auth = NULL;
1050 iinfo->fscrypt_auth_len = 0;
1051 inode_set_flags(inode, S_ENCRYPTED, S_ENCRYPTED);
1052 }
1053#endif
1054
f98a128a
YZ		 1055 if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) &&
1056 (issued & CEPH_CAP_AUTH_EXCL) == 0) {
ed94f87c 1057 inode->i_mode = mode;
ab871b90
EB		 1058 inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid));
1059 inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid));
38d46409
XL		 1060 doutc(cl, "%p %llx.%llx mode 0%o uid.gid %d.%d\n", inode,
1061 ceph_vinop(inode), inode->i_mode,
1062 from_kuid(&init_user_ns, inode->i_uid),
1063 from_kgid(&init_user_ns, inode->i_gid));
245ce991 1064 ceph_decode_timespec64(&ci->i_btime, &iinfo->btime);
193e7b37 1065 ceph_decode_timespec64(&ci->i_snap_btime, &iinfo->snap_btime);
355da1eb
SW		 1066 }
1067
94af0470
JL		 1068 /* directories have fl_stripe_unit set to zero */
1069 if (IS_ENCRYPTED(inode))
1070 inode->i_blkbits = CEPH_FSCRYPT_BLOCK_SHIFT;
1071 else if (le32_to_cpu(info->layout.fl_stripe_unit))
1072 inode->i_blkbits =
1073 fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1;
1074 else
1075 inode->i_blkbits = CEPH_BLOCK_SHIFT;
1076
f98a128a
YZ		 1077 if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) &&
1078 (issued & CEPH_CAP_LINK_EXCL) == 0)
bfe86848 1079 set_nlink(inode, le32_to_cpu(info->nlink));
355da1eb 1080
f98a128a
YZ		 1081 if (new_version || (new_issued & CEPH_CAP_ANY_RD)) {
1082 /* be careful with mtime, atime, size */
9bbeab41
AB		 1083 ceph_decode_timespec64(&atime, &info->atime);
1084 ceph_decode_timespec64(&mtime, &info->mtime);
1085 ceph_decode_timespec64(&ctime, &info->ctime);
f98a128a
YZ		 1086 ceph_fill_file_time(inode, issued,
1087 le32_to_cpu(info->time_warp_seq),
1088 &ctime, &mtime, &atime);
1089 }
1090
2af54a72
YZ		 1091 if (new_version || (info_caps & CEPH_CAP_FILE_SHARED)) {
1092 ci->i_files = le64_to_cpu(info->files);
1093 ci->i_subdirs = le64_to_cpu(info->subdirs);
1094 }
1095
f98a128a
YZ		 1096 if (new_version ||
1097 (new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) {
16be62fc 1098 u64 size = le64_to_cpu(info->size);
7627151e 1099 s64 old_pool = ci->i_layout.pool_id;
779fe0fb
YZ		 1100 struct ceph_string *old_ns;
1101
7627151e 1102 ceph_file_layout_from_legacy(&ci->i_layout, &info->layout);
779fe0fb
YZ		 1103 old_ns = rcu_dereference_protected(ci->i_layout.pool_ns,
1104 lockdep_is_held(&ci->i_ceph_lock));
1105 rcu_assign_pointer(ci->i_layout.pool_ns, pool_ns);
1106
1107 if (ci->i_layout.pool_id != old_pool || pool_ns != old_ns)
10183a69 1108 ci->i_ceph_flags &= ~CEPH_I_POOL_PERM;
10183a69 1109
779fe0fb 1110 pool_ns = old_ns;
10183a69 1111
16be62fc
JL		 1112 if (IS_ENCRYPTED(inode) && size &&
1113 iinfo->fscrypt_file_len == sizeof(__le64)) {
1114 u64 fsize = __le64_to_cpu(*(__le64 *)iinfo->fscrypt_file);
1115
1116 if (size == round_up(fsize, CEPH_FSCRYPT_BLOCK_SIZE)) {
1117 size = fsize;
1118 } else {
38d46409
XL		 1119 pr_warn_client(cl,
1120 "fscrypt size mismatch: size=%llu fscrypt_file=%llu, discarding fscrypt_file size.\n",
16be62fc
JL		 1121 info->size, size);
1122 }
1123 }
1124
f98a128a
YZ		 1125 queue_trunc = ceph_fill_file_size(inode, issued,
1126 le32_to_cpu(info->truncate_seq),
1127 le64_to_cpu(info->truncate_size),
16be62fc 1128 size);
f98a128a
YZ		 1129 /* only update max_size on auth cap */
1130 if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
1131 ci->i_max_size != le64_to_cpu(info->max_size)) {
38d46409
XL		 1132 doutc(cl, "max_size %lld -> %llu\n",
1133 ci->i_max_size, le64_to_cpu(info->max_size));
f98a128a
YZ		 1134 ci->i_max_size = le64_to_cpu(info->max_size);
1135 }
1136 }
355da1eb 1137
49a9f4f6
YZ		 1138 /* layout and rstat are not tracked by capability, update them if
1139 * the inode info is from auth mds */
1140 if (new_version || (info->cap.flags & CEPH_CAP_FLAG_AUTH)) {
1141 if (S_ISDIR(inode->i_mode)) {
1142 ci->i_dir_layout = iinfo->dir_layout;
1143 ci->i_rbytes = le64_to_cpu(info->rbytes);
1144 ci->i_rfiles = le64_to_cpu(info->rfiles);
1145 ci->i_rsubdirs = le64_to_cpu(info->rsubdirs);
08796873 1146 ci->i_dir_pin = iinfo->dir_pin;
e7f72952 1147 ci->i_rsnaps = iinfo->rsnaps;
9bbeab41 1148 ceph_decode_timespec64(&ci->i_rctime, &info->rctime);
49a9f4f6
YZ		 1149 }
1150 }
1151
355da1eb
SW		 1152 /* xattrs */
1153 /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
508b32d8 1154 if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) &&
355da1eb
SW		 1155 le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) {
1156 if (ci->i_xattrs.blob)
af8a85a4 1157 old_blob = ci->i_xattrs.blob;
355da1eb
SW		 1158 ci->i_xattrs.blob = xattr_blob;
1159 if (xattr_blob)
1160 memcpy(ci->i_xattrs.blob->vec.iov_base,
1161 iinfo->xattr_data, iinfo->xattr_len);
1162 ci->i_xattrs.version = le64_to_cpu(info->xattr_version);
7221fe4c 1163 ceph_forget_all_cached_acls(inode);
ac6713cc 1164 ceph_security_invalidate_secctx(inode);
a6424e48 1165 xattr_blob = NULL;
355da1eb
SW		 1166 }
1167
ffdeec7a 1168 /* finally update i_version */
aae1a442
YZ		 1169 if (le64_to_cpu(info->version) > ci->i_version)
1170 ci->i_version = le64_to_cpu(info->version);
ffdeec7a 1171
355da1eb 1172 inode->i_mapping->a_ops = &ceph_aops;
355da1eb
SW		 1173
1174 switch (inode->i_mode & S_IFMT) {
1175 case S_IFIFO:
1176 case S_IFBLK:
1177 case S_IFCHR:
1178 case S_IFSOCK:
5ba72e60 1179 inode->i_blkbits = PAGE_SHIFT;
ed94f87c 1180 init_special_inode(inode, inode->i_mode, rdev);
355da1eb
SW		 1181 inode->i_op = &ceph_file_iops;
1182 break;
1183 case S_IFREG:
1184 inode->i_op = &ceph_file_iops;
1185 inode->i_fop = &ceph_file_fops;
1186 break;
1187 case S_IFLNK:
355da1eb 1188 if (!ci->i_symlink) {
810339ec 1189 u32 symlen = iinfo->symlink_len;
355da1eb
SW		 1190 char *sym;
1191
be655596 1192 spin_unlock(&ci->i_ceph_lock);
355da1eb 1193
79f2f6ad
JL		 1194 if (IS_ENCRYPTED(inode)) {
1195 if (symlen != i_size_read(inode))
38d46409
XL		 1196 pr_err_client(cl,
1197 "%p %llx.%llx BAD symlink size %lld\n",
1198 inode, ceph_vinop(inode),
79f2f6ad
JL		 1199 i_size_read(inode));
1200
38d46409 1201 err = decode_encrypted_symlink(mdsc, iinfo->symlink,
79f2f6ad
JL		 1202 symlen, (u8 **)&sym);
1203 if (err < 0) {
38d46409
XL		 1204 pr_err_client(cl,
1205 "decoding encrypted symlink failed: %d\n",
1206 err);
79f2f6ad
JL		 1207 goto out;
1208 }
1209 symlen = err;
224a7542
YZ		 1210 i_size_write(inode, symlen);
1211 inode->i_blocks = calc_inode_blocks(symlen);
79f2f6ad
JL		 1212 } else {
1213 if (symlen != i_size_read(inode)) {
38d46409
XL		 1214 pr_err_client(cl,
1215 "%p %llx.%llx BAD symlink size %lld\n",
1216 inode, ceph_vinop(inode),
79f2f6ad
JL		 1217 i_size_read(inode));
1218 i_size_write(inode, symlen);
1219 inode->i_blocks = calc_inode_blocks(symlen);
1220 }
810339ec 1221
79f2f6ad
JL		 1222 err = -ENOMEM;
1223 sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS);
1224 if (!sym)
1225 goto out;
1226 }
355da1eb 1227
be655596 1228 spin_lock(&ci->i_ceph_lock);
355da1eb
SW		 1229 if (!ci->i_symlink)
1230 ci->i_symlink = sym;
1231 else
1232 kfree(sym); /* lost a race */
1233 }
79f2f6ad
JL		 1234
1235 if (IS_ENCRYPTED(inode)) {
1236 /*
1237 * Encrypted symlinks need to be decrypted before we can
1238 * cache their targets in i_link. Don't touch it here.
1239 */
1240 inode->i_op = &ceph_encrypted_symlink_iops;
1241 } else {
1242 inode->i_link = ci->i_symlink;
1243 inode->i_op = &ceph_symlink_iops;
1244 }
355da1eb
SW		 1245 break;
1246 case S_IFDIR:
1247 inode->i_op = &ceph_dir_iops;
1248 inode->i_fop = &ceph_dir_fops;
355da1eb
SW		 1249 break;
1250 default:
38d46409
XL		 1251 pr_err_client(cl, "%p %llx.%llx BAD mode 0%o\n", inode,
1252 ceph_vinop(inode), inode->i_mode);
355da1eb
SW		 1253 }
1254
355da1eb 1255 /* were we issued a capability? */
2af54a72 1256 if (info_caps) {
355da1eb
SW		 1257 if (ceph_snap(inode) == CEPH_NOSNAP) {
1258 ceph_add_cap(inode, session,
1259 le64_to_cpu(info->cap.cap_id),
135e671e 1260 info_caps,
355da1eb
SW		 1261 le32_to_cpu(info->cap.wanted),
1262 le32_to_cpu(info->cap.seq),
1263 le32_to_cpu(info->cap.mseq),
1264 le64_to_cpu(info->cap.realm),
d9df2783 1265 info->cap.flags, &new_cap);
2f92b3d0
YZ		 1266
1267 /* set dir completion flag? */
1268 if (S_ISDIR(inode->i_mode) &&
1269 ci->i_files == 0 && ci->i_subdirs == 0 &&
2af54a72 1270 (info_caps & CEPH_CAP_FILE_SHARED) &&
2f92b3d0
YZ		 1271 (issued & CEPH_CAP_FILE_EXCL) == 0 &&
1272 !__ceph_dir_is_complete(ci)) {
38d46409
XL		 1273 doutc(cl, " marking %p complete (empty)\n",
1274 inode);
fdd4e158 1275 i_size_write(inode, 0);
2f92b3d0 1276 __ceph_dir_set_complete(ci,
fdd4e158
YZ		 1277 atomic64_read(&ci->i_release_count),
1278 atomic64_read(&ci->i_ordered_count));
2f92b3d0
YZ		 1279 }
1280
d9df2783 1281 wake = true;
355da1eb 1282 } else {
38d46409
XL		 1283 doutc(cl, " %p got snap_caps %s\n", inode,
1284 ceph_cap_string(info_caps));
2af54a72 1285 ci->i_snap_caps |= info_caps;
355da1eb
SW		 1286 }
1287 }
31c542a1
YZ		 1288
1289 if (iinfo->inline_version > 0 &&
1290 iinfo->inline_version >= ci->i_inline_version) {
1291 int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO;
1292 ci->i_inline_version = iinfo->inline_version;
48490776 1293 if (ceph_has_inline_data(ci) &&
2af54a72 1294 (locked_page || (info_caps & cache_caps)))
31c542a1
YZ		 1295 fill_inline = true;
1296 }
1297
719a2514
YZ		 1298 if (cap_fmode >= 0) {
1299 if (!info_caps)
38d46409
XL		 1300 pr_warn_client(cl, "mds issued no caps on %llx.%llx\n",
1301 ceph_vinop(inode));
719a2514
YZ		 1302 __ceph_touch_fmode(ci, mdsc, cap_fmode);
1303 }
1304
be655596 1305 spin_unlock(&ci->i_ceph_lock);
355da1eb 1306
400e1286
JL		 1307 ceph_fscache_register_inode_cookie(inode);
1308
31c542a1 1309 if (fill_inline)
01deead0 1310 ceph_fill_inline_data(inode, locked_page,
31c542a1
YZ		 1311 iinfo->inline_data, iinfo->inline_len);
1312
d9df2783
YZ		 1313 if (wake)
1314 wake_up_all(&ci->i_cap_wq);
1315
355da1eb
SW		 1316 /* queue truncate if we saw i_size decrease */
1317 if (queue_trunc)
3c6f6b79 1318 ceph_queue_vmtruncate(inode);
355da1eb
SW		 1319
1320 /* populate frag tree */
3e7fbe9c
YZ		 1321 if (S_ISDIR(inode->i_mode))
1322 ceph_fill_fragtree(inode, &info->fragtree, dirinfo);
355da1eb
SW		 1323
1324 /* update delegation info? */
1325 if (dirinfo)
1326 ceph_fill_dirfrag(inode, dirinfo);
1327
1328 err = 0;
355da1eb 1329out:
d9df2783
YZ		 1330 if (new_cap)
1331 ceph_put_cap(mdsc, new_cap);
af8a85a4
LH		 1332 ceph_buffer_put(old_blob);
1333 ceph_buffer_put(xattr_blob);
779fe0fb 1334 ceph_put_string(pool_ns);
355da1eb
SW		 1335 return err;
1336}
1337
1338/*
543212b3 1339 * caller should hold session s_mutex and dentry->d_lock.
355da1eb 1340 */
543212b3
YZ		 1341static void __update_dentry_lease(struct inode *dir, struct dentry *dentry,
1342 struct ceph_mds_reply_lease *lease,
1343 struct ceph_mds_session *session,
1344 unsigned long from_time,
1345 struct ceph_mds_session **old_lease_session)
355da1eb 1346{
38d46409 1347 struct ceph_client *cl = ceph_inode_to_client(dir);
355da1eb 1348 struct ceph_dentry_info *di = ceph_dentry(dentry);
f5e17aed 1349 unsigned mask = le16_to_cpu(lease->mask);
355da1eb
SW		 1350 long unsigned duration = le32_to_cpu(lease->duration_ms);
1351 long unsigned ttl = from_time + (duration * HZ) / 1000;
1352 long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000;
f5d55f03 1353
38d46409 1354 doutc(cl, "%p duration %lu ms ttl %lu\n", dentry, duration, ttl);
355da1eb 1355
18fc8abd
AV		 1356 /* only track leases on regular dentries */
1357 if (ceph_snap(dir) != CEPH_NOSNAP)
543212b3 1358 return;
18fc8abd 1359
f5e17aed
JL		 1360 if (mask & CEPH_LEASE_PRIMARY_LINK)
1361 di->flags |= CEPH_DENTRY_PRIMARY_LINK;
1362 else
1363 di->flags &= ~CEPH_DENTRY_PRIMARY_LINK;
1364
97aeb6bf 1365 di->lease_shared_gen = atomic_read(&ceph_inode(dir)->i_shared_gen);
f5e17aed 1366 if (!(mask & CEPH_LEASE_VALID)) {
37c4efc1 1367 __ceph_dentry_dir_lease_touch(di);
543212b3 1368 return;
37c4efc1 1369 }
355da1eb 1370
52d60f8e 1371 if (di->lease_gen == atomic_read(&session->s_cap_gen) &&
9b16f03c 1372 time_before(ttl, di->time))
543212b3 1373 return; /* we already have a newer lease. */
355da1eb 1374
481f001f 1375 if (di->lease_session && di->lease_session != session) {
543212b3 1376 *old_lease_session = di->lease_session;
481f001f
YZ		 1377 di->lease_session = NULL;
1378 }
355da1eb 1379
355da1eb
SW		 1380 if (!di->lease_session)
1381 di->lease_session = ceph_get_mds_session(session);
52d60f8e 1382 di->lease_gen = atomic_read(&session->s_cap_gen);
355da1eb
SW		 1383 di->lease_seq = le32_to_cpu(lease->seq);
1384 di->lease_renew_after = half_ttl;
1385 di->lease_renew_from = 0;
9b16f03c 1386 di->time = ttl;
37c4efc1
YZ		 1387
1388 __ceph_dentry_lease_touch(di);
543212b3
YZ		 1389}
1390
1391static inline void update_dentry_lease(struct inode *dir, struct dentry *dentry,
1392 struct ceph_mds_reply_lease *lease,
1393 struct ceph_mds_session *session,
1394 unsigned long from_time)
1395{
1396 struct ceph_mds_session *old_lease_session = NULL;
1397 spin_lock(&dentry->d_lock);
1398 __update_dentry_lease(dir, dentry, lease, session, from_time,
1399 &old_lease_session);
1400 spin_unlock(&dentry->d_lock);
7e65624d 1401 ceph_put_mds_session(old_lease_session);
543212b3
YZ		 1402}
1403
1404/*
1405 * update dentry lease without having parent inode locked
1406 */
1407static void update_dentry_lease_careful(struct dentry *dentry,
1408 struct ceph_mds_reply_lease *lease,
1409 struct ceph_mds_session *session,
1410 unsigned long from_time,
1411 char *dname, u32 dname_len,
1412 struct ceph_vino *pdvino,
1413 struct ceph_vino *ptvino)
1414
1415{
1416 struct inode *dir;
1417 struct ceph_mds_session *old_lease_session = NULL;
1418
1419 spin_lock(&dentry->d_lock);
1420 /* make sure dentry's name matches target */
1421 if (dentry->d_name.len != dname_len ||
1422 memcmp(dentry->d_name.name, dname, dname_len))
1423 goto out_unlock;
1424
1425 dir = d_inode(dentry->d_parent);
1426 /* make sure parent matches dvino */
1427 if (!ceph_ino_compare(dir, pdvino))
1428 goto out_unlock;
1429
1430 /* make sure dentry's inode matches target. NULL ptvino means that
1431 * we expect a negative dentry */
1432 if (ptvino) {
1433 if (d_really_is_negative(dentry))
1434 goto out_unlock;
1435 if (!ceph_ino_compare(d_inode(dentry), ptvino))
1436 goto out_unlock;
1437 } else {
1438 if (d_really_is_positive(dentry))
1439 goto out_unlock;
1440 }
1441
1442 __update_dentry_lease(dir, dentry, lease, session,
1443 from_time, &old_lease_session);
355da1eb
SW		 1444out_unlock:
1445 spin_unlock(&dentry->d_lock);
7e65624d 1446 ceph_put_mds_session(old_lease_session);
355da1eb
SW		 1447}
1448
1449/*
1450 * splice a dentry to an inode.
810313c5 1451 * caller must hold directory i_rwsem for this to be safe.
355da1eb 1452 */
2bf996ac 1453static int splice_dentry(struct dentry **pdn, struct inode *in)
355da1eb 1454{
38d46409 1455 struct ceph_client *cl = ceph_inode_to_client(in);
2bf996ac 1456 struct dentry *dn = *pdn;
355da1eb
SW		 1457 struct dentry *realdn;
1458
2b0143b5 1459 BUG_ON(d_inode(dn));
1cd3935b 1460
5495c2d0
YZ		 1461 if (S_ISDIR(in->i_mode)) {
1462 /* If inode is directory, d_splice_alias() below will remove
1463 * 'realdn' from its origin parent. We need to ensure that
1464 * origin parent's readdir cache will not reference 'realdn'
1465 */
1466 realdn = d_find_any_alias(in);
1467 if (realdn) {
1468 struct ceph_dentry_info *di = ceph_dentry(realdn);
1469 spin_lock(&realdn->d_lock);
1470
1471 realdn->d_op->d_prune(realdn);
1472
1473 di->time = jiffies;
1474 di->lease_shared_gen = 0;
1475 di->offset = 0;
1476
1477 spin_unlock(&realdn->d_lock);
1478 dput(realdn);
1479 }
1480 }
1481
355da1eb
SW		 1482 /* dn must be unhashed */
1483 if (!d_unhashed(dn))
1484 d_drop(dn);
41d28bca 1485 realdn = d_splice_alias(in, dn);
355da1eb 1486 if (IS_ERR(realdn)) {
38d46409
XL		 1487 pr_err_client(cl, "error %ld %p inode %p ino %llx.%llx\n",
1488 PTR_ERR(realdn), dn, in, ceph_vinop(in));
2bf996ac
YZ		 1489 return PTR_ERR(realdn);
1490 }
1491
1492 if (realdn) {
38d46409
XL		 1493 doutc(cl, "dn %p (%d) spliced with %p (%d) inode %p ino %llx.%llx\n",
1494 dn, d_count(dn), realdn, d_count(realdn),
1495 d_inode(realdn), ceph_vinop(d_inode(realdn)));
355da1eb 1496 dput(dn);
2bf996ac 1497 *pdn = realdn;
355da1eb
SW		 1498 } else {
1499 BUG_ON(!ceph_dentry(dn));
38d46409
XL		 1500 doutc(cl, "dn %p attached to %p ino %llx.%llx\n", dn,
1501 d_inode(dn), ceph_vinop(d_inode(dn)));
355da1eb 1502 }
2bf996ac 1503 return 0;
355da1eb
SW		 1504}
1505
1506/*
1507 * Incorporate results into the local cache. This is either just
1508 * one inode, or a directory, dentry, and possibly linked-to inode (e.g.,
1509 * after a lookup).
1510 *
1511 * A reply may contain
1512 * a directory inode along with a dentry.
1513 * and/or a target inode
1514 *
1515 * Called with snap_rwsem (read).
1516 */
f5a03b08 1517int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req)
355da1eb 1518{
f5a03b08 1519 struct ceph_mds_session *session = req->r_session;
355da1eb
SW		 1520 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
1521 struct inode *in = NULL;
f5d55f03 1522 struct ceph_vino tvino, dvino;
5995d90d 1523 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(sb);
38d46409 1524 struct ceph_client *cl = fsc->client;
355da1eb
SW		 1525 int err = 0;
1526
38d46409
XL		 1527 doutc(cl, "%p is_dentry %d is_target %d\n", req,
1528 rinfo->head->is_dentry, rinfo->head->is_target);
355da1eb 1529
355da1eb 1530 if (!rinfo->head->is_target && !rinfo->head->is_dentry) {
38d46409 1531 doutc(cl, "reply is empty!\n");
3dd69aab 1532 if (rinfo->head->result == 0 && req->r_parent)
167c9e35 1533 ceph_invalidate_dir_request(req);
355da1eb
SW		 1534 return 0;
1535 }
1536
1537 if (rinfo->head->is_dentry) {
3dd69aab 1538 struct inode *dir = req->r_parent;
5b1daecd 1539
6c5e50fa 1540 if (dir) {
966c7160
JL		 1541 err = ceph_fill_inode(dir, NULL, &rinfo->diri,
1542 rinfo->dirfrag, session, -1,
1543 &req->r_caps_reservation);
6c5e50fa 1544 if (err < 0)
19913b4e 1545 goto done;
6c5e50fa
SW		 1546 } else {
1547 WARN_ON_ONCE(1);
1548 }
19913b4e 1549
74c9e6bf
YZ		 1550 if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME &&
1551 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) &&
1552 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) {
85529096 1553 bool is_nokey = false;
19913b4e
YZ		 1554 struct qstr dname;
1555 struct dentry *dn, *parent;
85529096
JL		 1556 struct fscrypt_str oname = FSTR_INIT(NULL, 0);
1557 struct ceph_fname fname = { .dir = dir,
1558 .name = rinfo->dname,
1559 .ctext = rinfo->altname,
1560 .name_len = rinfo->dname_len,
1561 .ctext_len = rinfo->altname_len };
19913b4e
YZ		 1562
1563 BUG_ON(!rinfo->head->is_target);
1564 BUG_ON(req->r_dentry);
1565
1566 parent = d_find_any_alias(dir);
1567 BUG_ON(!parent);
1568
85529096
JL		 1569 err = ceph_fname_alloc_buffer(dir, &oname);
1570 if (err < 0) {
1571 dput(parent);
1572 goto done;
1573 }
1574
1575 err = ceph_fname_to_usr(&fname, NULL, &oname, &is_nokey);
1576 if (err < 0) {
1577 dput(parent);
1578 ceph_fname_free_buffer(dir, &oname);
1579 goto done;
1580 }
1581 dname.name = oname.name;
1582 dname.len = oname.len;
8387ff25 1583 dname.hash = full_name_hash(parent, dname.name, dname.len);
f5d55f03
JL		 1584 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1585 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
19913b4e
YZ		 1586retry_lookup:
1587 dn = d_lookup(parent, &dname);
38d46409
XL		 1588 doutc(cl, "d_lookup on parent=%p name=%.*s got %p\n",
1589 parent, dname.len, dname.name, dn);
19913b4e
YZ		 1590
1591 if (!dn) {
1592 dn = d_alloc(parent, &dname);
38d46409
XL		 1593 doutc(cl, "d_alloc %p '%.*s' = %p\n", parent,
1594 dname.len, dname.name, dn);
d37b1d99 1595 if (!dn) {
19913b4e 1596 dput(parent);
85529096 1597 ceph_fname_free_buffer(dir, &oname);
19913b4e
YZ		 1598 err = -ENOMEM;
1599 goto done;
1600 }
85529096
JL		 1601 if (is_nokey) {
1602 spin_lock(&dn->d_lock);
1603 dn->d_flags |= DCACHE_NOKEY_NAME;
1604 spin_unlock(&dn->d_lock);
1605 }
ad5cb123 1606 err = 0;
2b0143b5 1607 } else if (d_really_is_positive(dn) &&
f5d55f03
JL		 1608 (ceph_ino(d_inode(dn)) != tvino.ino ||
1609 ceph_snap(d_inode(dn)) != tvino.snap)) {
38d46409
XL		 1610 doutc(cl, " dn %p points to wrong inode %p\n",
1611 dn, d_inode(dn));
933ad2c9 1612 ceph_dir_clear_ordered(dir);
19913b4e
YZ		 1613 d_delete(dn);
1614 dput(dn);
1615 goto retry_lookup;
1616 }
85529096 1617 ceph_fname_free_buffer(dir, &oname);
19913b4e
YZ		 1618
1619 req->r_dentry = dn;
1620 dput(parent);
1621 }
5b1daecd
SW		 1622 }
1623
86b58d13 1624 if (rinfo->head->is_target) {
bca9fc14
JL		 1625 /* Should be filled in by handle_reply */
1626 BUG_ON(!req->r_target_inode);
86b58d13 1627
bca9fc14 1628 in = req->r_target_inode;
966c7160
JL		 1629 err = ceph_fill_inode(in, req->r_locked_page, &rinfo->targeti,
1630 NULL, session,
bc2de10d 1631 (!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) &&
3bb48b41 1632 !test_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags) &&
57c21994 1633 rinfo->head->result == 0) ? req->r_fmode : -1,
86b58d13
YZ		 1634 &req->r_caps_reservation);
1635 if (err < 0) {
38d46409
XL		 1636 pr_err_client(cl, "badness %p %llx.%llx\n", in,
1637 ceph_vinop(in));
bca9fc14 1638 req->r_target_inode = NULL;
893e456b
JL		 1639 if (in->i_state & I_NEW)
1640 discard_new_inode(in);
68cbb805
JL		 1641 else
1642 iput(in);
86b58d13
YZ		 1643 goto done;
1644 }
893e456b
JL		 1645 if (in->i_state & I_NEW)
1646 unlock_new_inode(in);
86b58d13
YZ		 1647 }
1648
9358c6d4
SW		 1649 /*
1650 * ignore null lease/binding on snapdir ENOENT, or else we
1651 * will have trouble splicing in the virtual snapdir later
1652 */
3dd69aab
JL		 1653 if (rinfo->head->is_dentry &&
1654 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) &&
1655 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) &&
9358c6d4 1656 (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name,
3d14c5d2 1657 fsc->mount_options->snapdir_name,
9358c6d4 1658 req->r_dentry->d_name.len))) {
355da1eb
SW		 1659 /*
1660 * lookup link rename : null -> possibly existing inode
1661 * mknod symlink mkdir : null -> new inode
1662 * unlink : linked -> null
1663 */
3dd69aab 1664 struct inode *dir = req->r_parent;
355da1eb
SW		 1665 struct dentry *dn = req->r_dentry;
1666 bool have_dir_cap, have_lease;
1667
1668 BUG_ON(!dn);
1669 BUG_ON(!dir);
2b0143b5 1670 BUG_ON(d_inode(dn->d_parent) != dir);
f5d55f03
JL		 1671
1672 dvino.ino = le64_to_cpu(rinfo->diri.in->ino);
1673 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid);
1674
1675 BUG_ON(ceph_ino(dir) != dvino.ino);
1676 BUG_ON(ceph_snap(dir) != dvino.snap);
355da1eb 1677
355da1eb
SW		 1678 /* do we have a lease on the whole dir? */
1679 have_dir_cap =
1680 (le32_to_cpu(rinfo->diri.in->cap.caps) &
1681 CEPH_CAP_FILE_SHARED);
1682
1683 /* do we have a dn lease? */
1684 have_lease = have_dir_cap ||
2f90b852 1685 le32_to_cpu(rinfo->dlease->duration_ms);
355da1eb 1686 if (!have_lease)
38d46409 1687 doutc(cl, "no dentry lease or dir cap\n");
355da1eb
SW		 1688
1689 /* rename? */
1690 if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) {
0a8a70f9
YZ		 1691 struct inode *olddir = req->r_old_dentry_dir;
1692 BUG_ON(!olddir);
1693
38d46409
XL		 1694 doutc(cl, " src %p '%pd' dst %p '%pd'\n",
1695 req->r_old_dentry, req->r_old_dentry, dn, dn);
1696 doutc(cl, "doing d_move %p -> %p\n", req->r_old_dentry, dn);
c10f5e12 1697
fdd4e158
YZ		 1698 /* d_move screws up sibling dentries' offsets */
1699 ceph_dir_clear_ordered(dir);
1700 ceph_dir_clear_ordered(olddir);
1701
355da1eb 1702 d_move(req->r_old_dentry, dn);
38d46409
XL		 1703 doutc(cl, " src %p '%pd' dst %p '%pd'\n",
1704 req->r_old_dentry, req->r_old_dentry, dn, dn);
81a6cf2d 1705
c4a29f26
SW		 1706 /* ensure target dentry is invalidated, despite
1707 rehashing bug in vfs_rename_dir */
81a6cf2d
SW		 1708 ceph_invalidate_dentry_lease(dn);
1709
38d46409
XL		 1710 doutc(cl, "dn %p gets new offset %lld\n",
1711 req->r_old_dentry,
1712 ceph_dentry(req->r_old_dentry)->offset);
81a6cf2d 1713
2bf996ac
YZ		 1714 /* swap r_dentry and r_old_dentry in case that
1715 * splice_dentry() gets called later. This is safe
1716 * because no other place will use them */
1717 req->r_dentry = req->r_old_dentry;
1718 req->r_old_dentry = dn;
1719 dn = req->r_dentry;
355da1eb
SW		 1720 }
1721
1722 /* null dentry? */
1723 if (!rinfo->head->is_target) {
38d46409 1724 doutc(cl, "null dentry\n");
2b0143b5 1725 if (d_really_is_positive(dn)) {
38d46409 1726 doutc(cl, "d_delete %p\n", dn);
5495c2d0 1727 ceph_dir_clear_ordered(dir);
355da1eb 1728 d_delete(dn);
80d025ff
JL		 1729 } else if (have_lease) {
1730 if (d_unhashed(dn))
f8b31710 1731 d_add(dn, NULL);
7ffe4fce
XL		 1732 }
1733
1734 if (!d_unhashed(dn) && have_lease)
543212b3
YZ		 1735 update_dentry_lease(dir, dn,
1736 rinfo->dlease, session,
1737 req->r_request_started);
355da1eb
SW		 1738 goto done;
1739 }
1740
1741 /* attach proper inode */
2b0143b5 1742 if (d_really_is_negative(dn)) {
70db4f36 1743 ceph_dir_clear_ordered(dir);
86b58d13 1744 ihold(in);
2bf996ac
YZ		 1745 err = splice_dentry(&req->r_dentry, in);
1746 if (err < 0)
355da1eb 1747 goto done;
2bf996ac 1748 dn = req->r_dentry; /* may have spliced */
2b0143b5 1749 } else if (d_really_is_positive(dn) && d_inode(dn) != in) {
38d46409
XL		 1750 doutc(cl, " %p links to %p %llx.%llx, not %llx.%llx\n",
1751 dn, d_inode(dn), ceph_vinop(d_inode(dn)),
1752 ceph_vinop(in));
200fd27c 1753 d_invalidate(dn);
355da1eb 1754 have_lease = false;
355da1eb
SW		 1755 }
1756
f5d55f03 1757 if (have_lease) {
543212b3
YZ		 1758 update_dentry_lease(dir, dn,
1759 rinfo->dlease, session,
1760 req->r_request_started);
f5d55f03 1761 }
38d46409 1762 doutc(cl, " final dn %p\n", dn);
bc2de10d
JL		 1763 } else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP ||
1764 req->r_op == CEPH_MDS_OP_MKSNAP) &&
1f08529c 1765 test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) &&
bc2de10d 1766 !test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) {
3dd69aab 1767 struct inode *dir = req->r_parent;
355da1eb
SW		 1768
1769 /* fill out a snapdir LOOKUPSNAP dentry */
0a8a70f9
YZ		 1770 BUG_ON(!dir);
1771 BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR);
2bf996ac 1772 BUG_ON(!req->r_dentry);
38d46409
XL		 1773 doutc(cl, " linking snapped dir %p to dn %p\n", in,
1774 req->r_dentry);
70db4f36 1775 ceph_dir_clear_ordered(dir);
86b58d13 1776 ihold(in);
2bf996ac
YZ		 1777 err = splice_dentry(&req->r_dentry, in);
1778 if (err < 0)
355da1eb 1779 goto done;
543212b3
YZ		 1780 } else if (rinfo->head->is_dentry && req->r_dentry) {
1781 /* parent inode is not locked, be carefull */
cdde7c43 1782 struct ceph_vino *ptvino = NULL;
543212b3
YZ		 1783 dvino.ino = le64_to_cpu(rinfo->diri.in->ino);
1784 dvino.snap = le64_to_cpu(rinfo->diri.in->snapid);
1785 if (rinfo->head->is_target) {
1786 tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
1787 tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
1788 ptvino = &tvino;
cdde7c43 1789 }
543212b3
YZ		 1790 update_dentry_lease_careful(req->r_dentry, rinfo->dlease,
1791 session, req->r_request_started,
1792 rinfo->dname, rinfo->dname_len,
1793 &dvino, ptvino);
355da1eb 1794 }
355da1eb 1795done:
38d46409 1796 doutc(cl, "done err=%d\n", err);
355da1eb
SW		 1797 return err;
1798}
1799
1800/*
1801 * Prepopulate our cache with readdir results, leases, etc.
1802 */
79f9f99a
SW		 1803static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req,
1804 struct ceph_mds_session *session)
1805{
1806 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
38d46409 1807 struct ceph_client *cl = session->s_mdsc->fsc->client;
79f9f99a
SW		 1808 int i, err = 0;
1809
1810 for (i = 0; i < rinfo->dir_nr; i++) {
2a5beea3 1811 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
79f9f99a
SW		 1812 struct ceph_vino vino;
1813 struct inode *in;
1814 int rc;
1815
2a5beea3
YZ		 1816 vino.ino = le64_to_cpu(rde->inode.in->ino);
1817 vino.snap = le64_to_cpu(rde->inode.in->snapid);
79f9f99a 1818
ec9595c0 1819 in = ceph_get_inode(req->r_dentry->d_sb, vino, NULL);
79f9f99a
SW		 1820 if (IS_ERR(in)) {
1821 err = PTR_ERR(in);
38d46409 1822 doutc(cl, "badness got %d\n", err);
79f9f99a
SW		 1823 continue;
1824 }
966c7160
JL		 1825 rc = ceph_fill_inode(in, NULL, &rde->inode, NULL, session,
1826 -1, &req->r_caps_reservation);
79f9f99a 1827 if (rc < 0) {
38d46409
XL		 1828 pr_err_client(cl, "inode badness on %p got %d\n", in,
1829 rc);
79f9f99a 1830 err = rc;
893e456b
JL		 1831 if (in->i_state & I_NEW) {
1832 ihold(in);
1833 discard_new_inode(in);
1834 }
1835 } else if (in->i_state & I_NEW) {
1836 unlock_new_inode(in);
79f9f99a 1837 }
893e456b 1838
23c2c76e 1839 iput(in);
79f9f99a
SW		 1840 }
1841
1842 return err;
1843}
1844
fdd4e158
YZ		 1845void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl)
1846{
1847 if (ctl->page) {
1848 kunmap(ctl->page);
09cbfeaf 1849 put_page(ctl->page);
fdd4e158
YZ		 1850 ctl->page = NULL;
1851 }
1852}
1853
1854static int fill_readdir_cache(struct inode *dir, struct dentry *dn,
1855 struct ceph_readdir_cache_control *ctl,
1856 struct ceph_mds_request *req)
1857{
38d46409 1858 struct ceph_client *cl = ceph_inode_to_client(dir);
fdd4e158 1859 struct ceph_inode_info *ci = ceph_inode(dir);
09cbfeaf 1860 unsigned nsize = PAGE_SIZE / sizeof(struct dentry*);
fdd4e158
YZ		 1861 unsigned idx = ctl->index % nsize;
1862 pgoff_t pgoff = ctl->index / nsize;
1863
1864 if (!ctl->page || pgoff != page_index(ctl->page)) {
1865 ceph_readdir_cache_release(ctl);
af5e5eb5
YZ		 1866 if (idx == 0)
1867 ctl->page = grab_cache_page(&dir->i_data, pgoff);
1868 else
1869 ctl->page = find_lock_page(&dir->i_data, pgoff);
fdd4e158
YZ		 1870 if (!ctl->page) {
1871 ctl->index = -1;
af5e5eb5 1872 return idx == 0 ? -ENOMEM : 0;
fdd4e158
YZ		 1873 }
1874 /* reading/filling the cache are serialized by
810313c5 1875 * i_rwsem, no need to use page lock */
fdd4e158
YZ		 1876 unlock_page(ctl->page);
1877 ctl->dentries = kmap(ctl->page);
af5e5eb5 1878 if (idx == 0)
09cbfeaf 1879 memset(ctl->dentries, 0, PAGE_SIZE);
fdd4e158
YZ		 1880 }
1881
1882 if (req->r_dir_release_cnt == atomic64_read(&ci->i_release_count) &&
1883 req->r_dir_ordered_cnt == atomic64_read(&ci->i_ordered_count)) {
38d46409 1884 doutc(cl, "dn %p idx %d\n", dn, ctl->index);
fdd4e158
YZ		 1885 ctl->dentries[idx] = dn;
1886 ctl->index++;
1887 } else {
38d46409 1888 doutc(cl, "disable readdir cache\n");
fdd4e158
YZ		 1889 ctl->index = -1;
1890 }
1891 return 0;
1892}
1893
355da1eb
SW		 1894int ceph_readdir_prepopulate(struct ceph_mds_request *req,
1895 struct ceph_mds_session *session)
1896{
1897 struct dentry *parent = req->r_dentry;
af9ffa6d
XL		 1898 struct inode *inode = d_inode(parent);
1899 struct ceph_inode_info *ci = ceph_inode(inode);
355da1eb 1900 struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
38d46409 1901 struct ceph_client *cl = session->s_mdsc->fsc->client;
355da1eb
SW		 1902 struct qstr dname;
1903 struct dentry *dn;
1904 struct inode *in;
315f2408 1905 int err = 0, skipped = 0, ret, i;
0f51a983 1906 u32 frag = le32_to_cpu(req->r_args.readdir.frag);
f3c4ebe6
YZ		 1907 u32 last_hash = 0;
1908 u32 fpos_offset;
fdd4e158
YZ		 1909 struct ceph_readdir_cache_control cache_ctl = {};
1910
bc2de10d 1911 if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags))
fdd4e158 1912 return readdir_prepopulate_inodes_only(req, session);
81c6aea5 1913
79162547
YZ		 1914 if (rinfo->hash_order) {
1915 if (req->r_path2) {
1916 last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash,
1917 req->r_path2,
1918 strlen(req->r_path2));
1919 last_hash = ceph_frag_value(last_hash);
1920 } else if (rinfo->offset_hash) {
1921 /* mds understands offset_hash */
1922 WARN_ON_ONCE(req->r_readdir_offset != 2);
0f51a983 1923 last_hash = le32_to_cpu(req->r_args.readdir.offset_hash);
79162547 1924 }
f3c4ebe6
YZ		 1925 }
1926
81c6aea5
YZ		 1927 if (rinfo->dir_dir &&
1928 le32_to_cpu(rinfo->dir_dir->frag) != frag) {
38d46409
XL		 1929 doutc(cl, "got new frag %x -> %x\n", frag,
1930 le32_to_cpu(rinfo->dir_dir->frag));
81c6aea5 1931 frag = le32_to_cpu(rinfo->dir_dir->frag);
f3c4ebe6 1932 if (!rinfo->hash_order)
fdd4e158 1933 req->r_readdir_offset = 2;
81c6aea5 1934 }
355da1eb
SW		 1935
1936 if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) {
38d46409
XL		 1937 doutc(cl, "%d items under SNAPDIR dn %p\n",
1938 rinfo->dir_nr, parent);
355da1eb 1939 } else {
38d46409 1940 doutc(cl, "%d items under dn %p\n", rinfo->dir_nr, parent);
355da1eb 1941 if (rinfo->dir_dir)
2b0143b5 1942 ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir);
355da1eb 1943
8d45b911
YZ		 1944 if (ceph_frag_is_leftmost(frag) &&
1945 req->r_readdir_offset == 2 &&
1946 !(rinfo->hash_order && last_hash)) {
1947 /* note dir version at start of readdir so we can
1948 * tell if any dentries get dropped */
1949 req->r_dir_release_cnt =
1950 atomic64_read(&ci->i_release_count);
1951 req->r_dir_ordered_cnt =
1952 atomic64_read(&ci->i_ordered_count);
1953 req->r_readdir_cache_idx = 0;
1954 }
fdd4e158
YZ		 1955 }
1956
1957 cache_ctl.index = req->r_readdir_cache_idx;
f3c4ebe6 1958 fpos_offset = req->r_readdir_offset;
fdd4e158 1959
86b58d13 1960 /* FIXME: release caps/leases if error occurs */
355da1eb 1961 for (i = 0; i < rinfo->dir_nr; i++) {
2a5beea3 1962 struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
543212b3 1963 struct ceph_vino tvino;
355da1eb 1964
2a5beea3
YZ		 1965 dname.name = rde->name;
1966 dname.len = rde->name_len;
8387ff25 1967 dname.hash = full_name_hash(parent, dname.name, dname.len);
355da1eb 1968
f5d55f03
JL		 1969 tvino.ino = le64_to_cpu(rde->inode.in->ino);
1970 tvino.snap = le64_to_cpu(rde->inode.in->snapid);
355da1eb 1971
f3c4ebe6 1972 if (rinfo->hash_order) {
af9ffa6d 1973 u32 hash = ceph_frag_value(rde->raw_hash);
f3c4ebe6
YZ		 1974 if (hash != last_hash)
1975 fpos_offset = 2;
1976 last_hash = hash;
1977 rde->offset = ceph_make_fpos(hash, fpos_offset++, true);
1978 } else {
1979 rde->offset = ceph_make_fpos(frag, fpos_offset++, false);
1980 }
355da1eb
SW		 1981
1982retry_lookup:
1983 dn = d_lookup(parent, &dname);
38d46409
XL		 1984 doutc(cl, "d_lookup on parent=%p name=%.*s got %p\n",
1985 parent, dname.len, dname.name, dn);
355da1eb
SW		 1986
1987 if (!dn) {
1988 dn = d_alloc(parent, &dname);
38d46409
XL		 1989 doutc(cl, "d_alloc %p '%.*s' = %p\n", parent,
1990 dname.len, dname.name, dn);
d37b1d99 1991 if (!dn) {
38d46409 1992 doutc(cl, "d_alloc badness\n");
355da1eb
SW		 1993 err = -ENOMEM;
1994 goto out;
1995 }
af9ffa6d
XL		 1996 if (rde->is_nokey) {
1997 spin_lock(&dn->d_lock);
1998 dn->d_flags |= DCACHE_NOKEY_NAME;
1999 spin_unlock(&dn->d_lock);
2000 }
2b0143b5 2001 } else if (d_really_is_positive(dn) &&
f5d55f03
JL		 2002 (ceph_ino(d_inode(dn)) != tvino.ino ||
2003 ceph_snap(d_inode(dn)) != tvino.snap)) {
5495c2d0 2004 struct ceph_dentry_info *di = ceph_dentry(dn);
38d46409
XL		 2005 doutc(cl, " dn %p points to wrong inode %p\n",
2006 dn, d_inode(dn));
5495c2d0
YZ		 2007
2008 spin_lock(&dn->d_lock);
2009 if (di->offset > 0 &&
2010 di->lease_shared_gen ==
2011 atomic_read(&ci->i_shared_gen)) {
2012 __ceph_dir_clear_ordered(ci);
2013 di->offset = 0;
2014 }
2015 spin_unlock(&dn->d_lock);
2016
355da1eb
SW		 2017 d_delete(dn);
2018 dput(dn);
2019 goto retry_lookup;
355da1eb
SW		 2020 }
2021
355da1eb 2022 /* inode */
2b0143b5
DH		 2023 if (d_really_is_positive(dn)) {
2024 in = d_inode(dn);
355da1eb 2025 } else {
ec9595c0 2026 in = ceph_get_inode(parent->d_sb, tvino, NULL);
ac1f12ef 2027 if (IS_ERR(in)) {
38d46409 2028 doutc(cl, "new_inode badness\n");
2744c171 2029 d_drop(dn);
355da1eb 2030 dput(dn);
ac1f12ef 2031 err = PTR_ERR(in);
355da1eb
SW		 2032 goto out;
2033 }
355da1eb
SW		 2034 }
2035
966c7160
JL		 2036 ret = ceph_fill_inode(in, NULL, &rde->inode, NULL, session,
2037 -1, &req->r_caps_reservation);
fdd4e158 2038 if (ret < 0) {
38d46409
XL		 2039 pr_err_client(cl, "badness on %p %llx.%llx\n", in,
2040 ceph_vinop(in));
3e1d0452 2041 if (d_really_is_negative(dn)) {
893e456b
JL		 2042 if (in->i_state & I_NEW) {
2043 ihold(in);
2044 discard_new_inode(in);
2045 }
23c2c76e 2046 iput(in);
3e1d0452 2047 }
86b58d13 2048 d_drop(dn);
fdd4e158 2049 err = ret;
d69ed05a 2050 goto next_item;
355da1eb 2051 }
893e456b
JL		 2052 if (in->i_state & I_NEW)
2053 unlock_new_inode(in);
86b58d13 2054
2b0143b5 2055 if (d_really_is_negative(dn)) {
315f2408 2056 if (ceph_security_xattr_deadlock(in)) {
38d46409
XL		 2057 doutc(cl, " skip splicing dn %p to inode %p"
2058 " (security xattr deadlock)\n", dn, in);
23c2c76e 2059 iput(in);
315f2408
YZ		 2060 skipped++;
2061 goto next_item;
2062 }
2063
2bf996ac
YZ		 2064 err = splice_dentry(&dn, in);
2065 if (err < 0)
86b58d13 2066 goto next_item;
86b58d13
YZ		 2067 }
2068
f3c4ebe6 2069 ceph_dentry(dn)->offset = rde->offset;
86b58d13 2070
543212b3
YZ		 2071 update_dentry_lease(d_inode(parent), dn,
2072 rde->lease, req->r_session,
2073 req->r_request_started);
fdd4e158 2074
315f2408 2075 if (err == 0 && skipped == 0 && cache_ctl.index >= 0) {
fdd4e158
YZ		 2076 ret = fill_readdir_cache(d_inode(parent), dn,
2077 &cache_ctl, req);
2078 if (ret < 0)
2079 err = ret;
2080 }
d69ed05a 2081next_item:
2bf996ac 2082 dput(dn);
355da1eb 2083 }
355da1eb 2084out:
315f2408 2085 if (err == 0 && skipped == 0) {
bc2de10d 2086 set_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags);
fdd4e158
YZ		 2087 req->r_readdir_cache_idx = cache_ctl.index;
2088 }
2089 ceph_readdir_cache_release(&cache_ctl);
38d46409 2090 doutc(cl, "done\n");
355da1eb
SW		 2091 return err;
2092}
2093
efb0ca76 2094bool ceph_inode_set_size(struct inode *inode, loff_t size)
355da1eb 2095{
38d46409 2096 struct ceph_client *cl = ceph_inode_to_client(inode);
355da1eb 2097 struct ceph_inode_info *ci = ceph_inode(inode);
efb0ca76 2098 bool ret;
355da1eb 2099
be655596 2100 spin_lock(&ci->i_ceph_lock);
38d46409 2101 doutc(cl, "set_size %p %llu -> %llu\n", inode, i_size_read(inode), size);
99c88e69 2102 i_size_write(inode, size);
400e1286 2103 ceph_fscache_update(inode);
224a7542 2104 inode->i_blocks = calc_inode_blocks(size);
355da1eb 2105
efb0ca76 2106 ret = __ceph_should_report_size(ci);
355da1eb 2107
be655596 2108 spin_unlock(&ci->i_ceph_lock);
400e1286 2109
355da1eb
SW		 2110 return ret;
2111}
2112
64f28c62 2113void ceph_queue_inode_work(struct inode *inode, int work_bit)
355da1eb 2114{
5995d90d 2115 struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode);
38d46409 2116 struct ceph_client *cl = fsc->client;
1cf89a8d 2117 struct ceph_inode_info *ci = ceph_inode(inode);
64f28c62 2118 set_bit(work_bit, &ci->i_work_mask);
1cf89a8d
YZ		 2119
2120 ihold(inode);
64f28c62 2121 if (queue_work(fsc->inode_wq, &ci->i_work)) {
38d46409
XL		 2122 doutc(cl, "%p %llx.%llx mask=%lx\n", inode,
2123 ceph_vinop(inode), ci->i_work_mask);
1cf89a8d 2124 } else {
38d46409
XL		 2125 doutc(cl, "%p %llx.%llx already queued, mask=%lx\n",
2126 inode, ceph_vinop(inode), ci->i_work_mask);
1cf89a8d
YZ		 2127 iput(inode);
2128 }
2129}
2130
2131static void ceph_do_invalidate_pages(struct inode *inode)
2132{
38d46409 2133 struct ceph_client *cl = ceph_inode_to_client(inode);
1cf89a8d 2134 struct ceph_inode_info *ci = ceph_inode(inode);
355da1eb
SW		 2135 u32 orig_gen;
2136 int check = 0;
2137
400e1286
JL		 2138 ceph_fscache_invalidate(inode, false);
2139
b0d7c223 2140 mutex_lock(&ci->i_truncate_mutex);
6c93df5d 2141
5d6451b1 2142 if (ceph_inode_is_shutdown(inode)) {
38d46409
XL		 2143 pr_warn_ratelimited_client(cl,
2144 "%p %llx.%llx is shut down\n", inode,
2145 ceph_vinop(inode));
6c93df5d
YZ		 2146 mapping_set_error(inode->i_mapping, -EIO);
2147 truncate_pagecache(inode, 0);
2148 mutex_unlock(&ci->i_truncate_mutex);
2149 goto out;
2150 }
2151
be655596 2152 spin_lock(&ci->i_ceph_lock);
38d46409
XL		 2153 doutc(cl, "%p %llx.%llx gen %d revoking %d\n", inode,
2154 ceph_vinop(inode), ci->i_rdcache_gen, ci->i_rdcache_revoking);
cd045cb4 2155 if (ci->i_rdcache_revoking != ci->i_rdcache_gen) {
9563f88c
YZ		 2156 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
2157 check = 1;
be655596 2158 spin_unlock(&ci->i_ceph_lock);
b0d7c223 2159 mutex_unlock(&ci->i_truncate_mutex);
355da1eb
SW		 2160 goto out;
2161 }
2162 orig_gen = ci->i_rdcache_gen;
be655596 2163 spin_unlock(&ci->i_ceph_lock);
355da1eb 2164
9abd4db7 2165 if (invalidate_inode_pages2(inode->i_mapping) < 0) {
38d46409
XL		 2166 pr_err_client(cl, "invalidate_inode_pages2 %llx.%llx failed\n",
2167 ceph_vinop(inode));
9abd4db7 2168 }
355da1eb 2169
be655596 2170 spin_lock(&ci->i_ceph_lock);
cd045cb4
SW		 2171 if (orig_gen == ci->i_rdcache_gen &&
2172 orig_gen == ci->i_rdcache_revoking) {
38d46409
XL		 2173 doutc(cl, "%p %llx.%llx gen %d successful\n", inode,
2174 ceph_vinop(inode), ci->i_rdcache_gen);
cd045cb4 2175 ci->i_rdcache_revoking--;
355da1eb
SW		 2176 check = 1;
2177 } else {
38d46409
XL		 2178 doutc(cl, "%p %llx.%llx gen %d raced, now %d revoking %d\n",
2179 inode, ceph_vinop(inode), orig_gen, ci->i_rdcache_gen,
2180 ci->i_rdcache_revoking);
9563f88c
YZ		 2181 if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
2182 check = 1;
355da1eb 2183 }
be655596 2184 spin_unlock(&ci->i_ceph_lock);
b0d7c223 2185 mutex_unlock(&ci->i_truncate_mutex);
9563f88c 2186out:
355da1eb 2187 if (check)
e4b731cc 2188 ceph_check_caps(ci, 0);
3c6f6b79
SW		 2189}
2190
355da1eb 2191/*
355da1eb
SW		 2192 * Make sure any pending truncation is applied before doing anything
2193 * that may depend on it.
2194 */
b415bf4f 2195void __ceph_do_pending_vmtruncate(struct inode *inode)
355da1eb 2196{
38d46409 2197 struct ceph_client *cl = ceph_inode_to_client(inode);
355da1eb
SW		 2198 struct ceph_inode_info *ci = ceph_inode(inode);
2199 u64 to;
a85f50b6 2200 int wrbuffer_refs, finish = 0;
355da1eb 2201
b0d7c223 2202 mutex_lock(&ci->i_truncate_mutex);
355da1eb 2203retry:
be655596 2204 spin_lock(&ci->i_ceph_lock);
355da1eb 2205 if (ci->i_truncate_pending == 0) {
38d46409
XL		 2206 doutc(cl, "%p %llx.%llx none pending\n", inode,
2207 ceph_vinop(inode));
be655596 2208 spin_unlock(&ci->i_ceph_lock);
b0d7c223 2209 mutex_unlock(&ci->i_truncate_mutex);
355da1eb
SW		 2210 return;
2211 }
2212
2213 /*
2214 * make sure any dirty snapped pages are flushed before we
2215 * possibly truncate them.. so write AND block!
2216 */
2217 if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) {
c8fd0d37 2218 spin_unlock(&ci->i_ceph_lock);
38d46409
XL		 2219 doutc(cl, "%p %llx.%llx flushing snaps first\n", inode,
2220 ceph_vinop(inode));
355da1eb
SW		 2221 filemap_write_and_wait_range(&inode->i_data, 0,
2222 inode->i_sb->s_maxbytes);
2223 goto retry;
2224 }
2225
b0d7c223
YZ		 2226 /* there should be no reader or writer */
2227 WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref);
2228
5c64737d 2229 to = ci->i_truncate_pagecache_size;
355da1eb 2230 wrbuffer_refs = ci->i_wrbuffer_ref;
38d46409
XL		 2231 doutc(cl, "%p %llx.%llx (%d) to %lld\n", inode, ceph_vinop(inode),
2232 ci->i_truncate_pending, to);
be655596 2233 spin_unlock(&ci->i_ceph_lock);
355da1eb 2234
400e1286 2235 ceph_fscache_resize(inode, to);
4e217b5d 2236 truncate_pagecache(inode, to);
355da1eb 2237
be655596 2238 spin_lock(&ci->i_ceph_lock);
5c64737d 2239 if (to == ci->i_truncate_pagecache_size) {
a85f50b6
YZ		 2240 ci->i_truncate_pending = 0;
2241 finish = 1;
2242 }
be655596 2243 spin_unlock(&ci->i_ceph_lock);
a85f50b6
YZ		 2244 if (!finish)
2245 goto retry;
355da1eb 2246
b0d7c223
YZ		 2247 mutex_unlock(&ci->i_truncate_mutex);
2248
355da1eb 2249 if (wrbuffer_refs == 0)
e4b731cc 2250 ceph_check_caps(ci, 0);
a85f50b6
YZ		 2251
2252 wake_up_all(&ci->i_cap_wq);
355da1eb
SW		 2253}
2254
1cf89a8d
YZ		 2255static void ceph_inode_work(struct work_struct *work)
2256{
2257 struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
2258 i_work);
874c8ca1 2259 struct inode *inode = &ci->netfs.inode;
38d46409 2260 struct ceph_client *cl = ceph_inode_to_client(inode);
1cf89a8d
YZ		 2261
2262 if (test_and_clear_bit(CEPH_I_WORK_WRITEBACK, &ci->i_work_mask)) {
38d46409 2263 doutc(cl, "writeback %p %llx.%llx\n", inode, ceph_vinop(inode));
1cf89a8d
YZ		 2264 filemap_fdatawrite(&inode->i_data);
2265 }
2266 if (test_and_clear_bit(CEPH_I_WORK_INVALIDATE_PAGES, &ci->i_work_mask))
2267 ceph_do_invalidate_pages(inode);
2268
2269 if (test_and_clear_bit(CEPH_I_WORK_VMTRUNCATE, &ci->i_work_mask))
2270 __ceph_do_pending_vmtruncate(inode);
2271
a8810cdc 2272 if (test_and_clear_bit(CEPH_I_WORK_CHECK_CAPS, &ci->i_work_mask))
e4b731cc 2273 ceph_check_caps(ci, 0);
a8810cdc
JL		 2274
2275 if (test_and_clear_bit(CEPH_I_WORK_FLUSH_SNAPS, &ci->i_work_mask))
2276 ceph_flush_snaps(ci, NULL);
2277
1cf89a8d
YZ		 2278 iput(inode);
2279}
2280
79f2f6ad
JL		 2281static const char *ceph_encrypted_get_link(struct dentry *dentry,
2282 struct inode *inode,
2283 struct delayed_call *done)
2284{
2285 struct ceph_inode_info *ci = ceph_inode(inode);
2286
2287 if (!dentry)
2288 return ERR_PTR(-ECHILD);
2289
2290 return fscrypt_get_symlink(inode, ci->i_symlink, i_size_read(inode),
2291 done);
2292}
2293
2294static int ceph_encrypted_symlink_getattr(struct mnt_idmap *idmap,
2295 const struct path *path,
2296 struct kstat *stat, u32 request_mask,
2297 unsigned int query_flags)
2298{
2299 int ret;
2300
2301 ret = ceph_getattr(idmap, path, stat, request_mask, query_flags);
2302 if (ret)
2303 return ret;
2304 return fscrypt_symlink_getattr(path, stat);
2305}
2306
355da1eb
SW		 2307/*
2308 * symlinks
2309 */
355da1eb 2310static const struct inode_operations ceph_symlink_iops = {
6b255391 2311 .get_link = simple_get_link,
0b932672
YZ		 2312 .setattr = ceph_setattr,
2313 .getattr = ceph_getattr,
0b932672 2314 .listxattr = ceph_listxattr,
355da1eb
SW		 2315};
2316
79f2f6ad
JL		 2317static const struct inode_operations ceph_encrypted_symlink_iops = {
2318 .get_link = ceph_encrypted_get_link,
2319 .setattr = ceph_setattr,
2320 .getattr = ceph_encrypted_symlink_getattr,
2321 .listxattr = ceph_listxattr,
2322};
2323
5c64737d
XL		 2324/*
2325 * Transfer the encrypted last block to the MDS and the MDS
2326 * will help update it when truncating a smaller size.
2327 *
2328 * We don't support a PAGE_SIZE that is smaller than the
2329 * CEPH_FSCRYPT_BLOCK_SIZE.
2330 */
2331static int fill_fscrypt_truncate(struct inode *inode,
2332 struct ceph_mds_request *req,
2333 struct iattr *attr)
2334{
38d46409 2335 struct ceph_client *cl = ceph_inode_to_client(inode);
5c64737d
XL		 2336 struct ceph_inode_info *ci = ceph_inode(inode);
2337 int boff = attr->ia_size % CEPH_FSCRYPT_BLOCK_SIZE;
2338 loff_t pos, orig_pos = round_down(attr->ia_size,
2339 CEPH_FSCRYPT_BLOCK_SIZE);
2340 u64 block = orig_pos >> CEPH_FSCRYPT_BLOCK_SHIFT;
2341 struct ceph_pagelist *pagelist = NULL;
2342 struct kvec iov = {0};
2343 struct iov_iter iter;
2344 struct page *page = NULL;
2345 struct ceph_fscrypt_truncate_size_header header;
2346 int retry_op = 0;
2347 int len = CEPH_FSCRYPT_BLOCK_SIZE;
2348 loff_t i_size = i_size_read(inode);
2349 int got, ret, issued;
2350 u64 objver;
2351
2352 ret = __ceph_get_caps(inode, NULL, CEPH_CAP_FILE_RD, 0, -1, &got);
2353 if (ret < 0)
2354 return ret;
2355
2356 issued = __ceph_caps_issued(ci, NULL);
2357
38d46409
XL		 2358 doutc(cl, "size %lld -> %lld got cap refs on %s, issued %s\n",
2359 i_size, attr->ia_size, ceph_cap_string(got),
2360 ceph_cap_string(issued));
5c64737d
XL		 2361
2362 /* Try to writeback the dirty pagecaches */
2363 if (issued & (CEPH_CAP_FILE_BUFFER)) {
2364 loff_t lend = orig_pos + CEPH_FSCRYPT_BLOCK_SHIFT - 1;
2365
2366 ret = filemap_write_and_wait_range(inode->i_mapping,
2367 orig_pos, lend);
2368 if (ret < 0)
2369 goto out;
2370 }
2371
2372 page = __page_cache_alloc(GFP_KERNEL);
2373 if (page == NULL) {
2374 ret = -ENOMEM;
2375 goto out;
2376 }
2377
2378 pagelist = ceph_pagelist_alloc(GFP_KERNEL);
2379 if (!pagelist) {
2380 ret = -ENOMEM;
2381 goto out;
2382 }
2383
2384 iov.iov_base = kmap_local_page(page);
2385 iov.iov_len = len;
2386 iov_iter_kvec(&iter, READ, &iov, 1, len);
2387
2388 pos = orig_pos;
2389 ret = __ceph_sync_read(inode, &pos, &iter, &retry_op, &objver);
2390 if (ret < 0)
2391 goto out;
2392
2393 /* Insert the header first */
2394 header.ver = 1;
2395 header.compat = 1;
2396 header.change_attr = cpu_to_le64(inode_peek_iversion_raw(inode));
2397
2398 /*
2399 * Always set the block_size to CEPH_FSCRYPT_BLOCK_SIZE,
2400 * because in MDS it may need this to do the truncate.
2401 */
2402 header.block_size = cpu_to_le32(CEPH_FSCRYPT_BLOCK_SIZE);
2403
2404 /*
2405 * If we hit a hole here, we should just skip filling
2406 * the fscrypt for the request, because once the fscrypt
2407 * is enabled, the file will be split into many blocks
2408 * with the size of CEPH_FSCRYPT_BLOCK_SIZE, if there
2409 * has a hole, the hole size should be multiple of block
2410 * size.
2411 *
2412 * If the Rados object doesn't exist, it will be set to 0.
2413 */
2414 if (!objver) {
38d46409 2415 doutc(cl, "hit hole, ppos %lld < size %lld\n", pos, i_size);
5c64737d
XL		 2416
2417 header.data_len = cpu_to_le32(8 + 8 + 4);
2418 header.file_offset = 0;
2419 ret = 0;
2420 } else {
2421 header.data_len = cpu_to_le32(8 + 8 + 4 + CEPH_FSCRYPT_BLOCK_SIZE);
2422 header.file_offset = cpu_to_le64(orig_pos);
2423
38d46409
XL		 2424 doutc(cl, "encrypt block boff/bsize %d/%lu\n", boff,
2425 CEPH_FSCRYPT_BLOCK_SIZE);
295fc4aa 2426
5c64737d
XL		 2427 /* truncate and zero out the extra contents for the last block */
2428 memset(iov.iov_base + boff, 0, PAGE_SIZE - boff);
2429
2430 /* encrypt the last block */
2431 ret = ceph_fscrypt_encrypt_block_inplace(inode, page,
2432 CEPH_FSCRYPT_BLOCK_SIZE,
2433 0, block,
2434 GFP_KERNEL);
2435 if (ret)
2436 goto out;
2437 }
2438
2439 /* Insert the header */
2440 ret = ceph_pagelist_append(pagelist, &header, sizeof(header));
2441 if (ret)
2442 goto out;
2443
2444 if (header.block_size) {
2445 /* Append the last block contents to pagelist */
2446 ret = ceph_pagelist_append(pagelist, iov.iov_base,
2447 CEPH_FSCRYPT_BLOCK_SIZE);
2448 if (ret)
2449 goto out;
2450 }
2451 req->r_pagelist = pagelist;
2452out:
38d46409
XL		 2453 doutc(cl, "%p %llx.%llx size dropping cap refs on %s\n", inode,
2454 ceph_vinop(inode), ceph_cap_string(got));
5c64737d
XL		 2455 ceph_put_cap_refs(ci, got);
2456 if (iov.iov_base)
2457 kunmap_local(iov.iov_base);
2458 if (page)
2459 __free_pages(page, 0);
2460 if (ret && pagelist)
2461 ceph_pagelist_release(pagelist);
2462 return ret;
2463}
2464
79c66a0c
AM		 2465int __ceph_setattr(struct mnt_idmap *idmap, struct inode *inode,
2466 struct iattr *attr, struct ceph_iattr *cia)
355da1eb 2467{
355da1eb 2468 struct ceph_inode_info *ci = ceph_inode(inode);
c62498d7 2469 unsigned int ia_valid = attr->ia_valid;
355da1eb 2470 struct ceph_mds_request *req;
5995d90d 2471 struct ceph_mds_client *mdsc = ceph_sb_to_fs_client(inode->i_sb)->mdsc;
38d46409 2472 struct ceph_client *cl = ceph_inode_to_client(inode);
f66fd9f0 2473 struct ceph_cap_flush *prealloc_cf;
5c64737d 2474 loff_t isize = i_size_read(inode);
355da1eb
SW		 2475 int issued;
2476 int release = 0, dirtied = 0;
2477 int mask = 0;
2478 int err = 0;
fca65b4a 2479 int inode_dirty_flags = 0;
604d1b02 2480 bool lock_snap_rwsem = false;
5c64737d
XL		 2481 bool fill_fscrypt;
2482 int truncate_retry = 20; /* The RMW will take around 50ms */
355da1eb 2483
5c64737d 2484retry:
f66fd9f0
YZ		 2485 prealloc_cf = ceph_alloc_cap_flush();
2486 if (!prealloc_cf)
2487 return -ENOMEM;
2488
355da1eb
SW		 2489 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR,
2490 USE_AUTH_MDS);
f66fd9f0
YZ		 2491 if (IS_ERR(req)) {
2492 ceph_free_cap_flush(prealloc_cf);
355da1eb 2493 return PTR_ERR(req);
f66fd9f0 2494 }
355da1eb 2495
5c64737d 2496 fill_fscrypt = false;
be655596 2497 spin_lock(&ci->i_ceph_lock);
355da1eb 2498 issued = __ceph_caps_issued(ci, NULL);
604d1b02
YZ		 2499
2500 if (!ci->i_head_snapc &&
2501 (issued & (CEPH_CAP_ANY_EXCL | CEPH_CAP_FILE_WR))) {
2502 lock_snap_rwsem = true;
2503 if (!down_read_trylock(&mdsc->snap_rwsem)) {
2504 spin_unlock(&ci->i_ceph_lock);
2505 down_read(&mdsc->snap_rwsem);
2506 spin_lock(&ci->i_ceph_lock);
2507 issued = __ceph_caps_issued(ci, NULL);
2508 }
2509 }
2510
38d46409
XL		 2511 doutc(cl, "%p %llx.%llx issued %s\n", inode, ceph_vinop(inode),
2512 ceph_cap_string(issued));
2d332d5b
JL		 2513#if IS_ENABLED(CONFIG_FS_ENCRYPTION)
2514 if (cia && cia->fscrypt_auth) {
2515 u32 len = ceph_fscrypt_auth_len(cia->fscrypt_auth);
2516
2517 if (len > sizeof(*cia->fscrypt_auth)) {
2518 err = -EINVAL;
2519 spin_unlock(&ci->i_ceph_lock);
2520 goto out;
2521 }
2522
38d46409
XL		 2523 doutc(cl, "%p %llx.%llx fscrypt_auth len %u to %u)\n", inode,
2524 ceph_vinop(inode), ci->fscrypt_auth_len, len);
2d332d5b
JL		 2525
2526 /* It should never be re-set once set */
2527 WARN_ON_ONCE(ci->fscrypt_auth);
2528
2529 if (issued & CEPH_CAP_AUTH_EXCL) {
2530 dirtied |= CEPH_CAP_AUTH_EXCL;
2531 kfree(ci->fscrypt_auth);
2532 ci->fscrypt_auth = (u8 *)cia->fscrypt_auth;
2533 ci->fscrypt_auth_len = len;
2534 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
2535 ci->fscrypt_auth_len != len ||
2536 memcmp(ci->fscrypt_auth, cia->fscrypt_auth, len)) {
2537 req->r_fscrypt_auth = cia->fscrypt_auth;
2538 mask |= CEPH_SETATTR_FSCRYPT_AUTH;
2539 release |= CEPH_CAP_AUTH_SHARED;
2540 }
2541 cia->fscrypt_auth = NULL;
2542 }
2543#else
2544 if (cia && cia->fscrypt_auth) {
2545 err = -EINVAL;
2546 spin_unlock(&ci->i_ceph_lock);
2547 goto out;
2548 }
2549#endif /* CONFIG_FS_ENCRYPTION */
355da1eb
SW		 2550
2551 if (ia_valid & ATTR_UID) {
a04aff25
CB		 2552 kuid_t fsuid = from_vfsuid(idmap, i_user_ns(inode), attr->ia_vfsuid);
2553
38d46409
XL		 2554 doutc(cl, "%p %llx.%llx uid %d -> %d\n", inode,
2555 ceph_vinop(inode),
2556 from_kuid(&init_user_ns, inode->i_uid),
2557 from_kuid(&init_user_ns, attr->ia_uid));
355da1eb 2558 if (issued & CEPH_CAP_AUTH_EXCL) {
a04aff25 2559 inode->i_uid = fsuid;
355da1eb
SW		 2560 dirtied |= CEPH_CAP_AUTH_EXCL;
2561 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
a04aff25 2562 !uid_eq(fsuid, inode->i_uid)) {
ab871b90 2563 req->r_args.setattr.uid = cpu_to_le32(
a04aff25 2564 from_kuid(&init_user_ns, fsuid));
355da1eb
SW		 2565 mask |= CEPH_SETATTR_UID;
2566 release |= CEPH_CAP_AUTH_SHARED;
2567 }
2568 }
2569 if (ia_valid & ATTR_GID) {
a04aff25
CB		 2570 kgid_t fsgid = from_vfsgid(idmap, i_user_ns(inode), attr->ia_vfsgid);
2571
38d46409
XL		 2572 doutc(cl, "%p %llx.%llx gid %d -> %d\n", inode,
2573 ceph_vinop(inode),
2574 from_kgid(&init_user_ns, inode->i_gid),
2575 from_kgid(&init_user_ns, attr->ia_gid));
355da1eb 2576 if (issued & CEPH_CAP_AUTH_EXCL) {
a04aff25 2577 inode->i_gid = fsgid;
355da1eb
SW		 2578 dirtied |= CEPH_CAP_AUTH_EXCL;
2579 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
a04aff25 2580 !gid_eq(fsgid, inode->i_gid)) {
ab871b90 2581 req->r_args.setattr.gid = cpu_to_le32(
a04aff25 2582 from_kgid(&init_user_ns, fsgid));
355da1eb
SW		 2583 mask |= CEPH_SETATTR_GID;
2584 release |= CEPH_CAP_AUTH_SHARED;
2585 }
2586 }
2587 if (ia_valid & ATTR_MODE) {
38d46409
XL		 2588 doutc(cl, "%p %llx.%llx mode 0%o -> 0%o\n", inode,
2589 ceph_vinop(inode), inode->i_mode, attr->ia_mode);
355da1eb
SW		 2590 if (issued & CEPH_CAP_AUTH_EXCL) {
2591 inode->i_mode = attr->ia_mode;
2592 dirtied |= CEPH_CAP_AUTH_EXCL;
2593 } else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
2594 attr->ia_mode != inode->i_mode) {
7221fe4c 2595 inode->i_mode = attr->ia_mode;
355da1eb
SW		 2596 req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode);
2597 mask |= CEPH_SETATTR_MODE;
2598 release |= CEPH_CAP_AUTH_SHARED;
2599 }
2600 }
2601
2602 if (ia_valid & ATTR_ATIME) {
c453bdb5
JL		 2603 struct timespec64 atime = inode_get_atime(inode);
2604
e21165bf
LT		 2605 doutc(cl, "%p %llx.%llx atime %lld.%09ld -> %lld.%09ld\n",
2606 inode, ceph_vinop(inode),
2607 atime.tv_sec, atime.tv_nsec,
2608 attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec);
355da1eb
SW		 2609 if (issued & CEPH_CAP_FILE_EXCL) {
2610 ci->i_time_warp_seq++;
c453bdb5 2611 inode_set_atime_to_ts(inode, attr->ia_atime);
355da1eb
SW		 2612 dirtied |= CEPH_CAP_FILE_EXCL;
2613 } else if ((issued & CEPH_CAP_FILE_WR) &&
c453bdb5
JL		 2614 timespec64_compare(&atime,
2615 &attr->ia_atime) < 0) {
2616 inode_set_atime_to_ts(inode, attr->ia_atime);
355da1eb
SW		 2617 dirtied |= CEPH_CAP_FILE_WR;
2618 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
c453bdb5 2619 !timespec64_equal(&atime, &attr->ia_atime)) {
9bbeab41
AB		 2620 ceph_encode_timespec64(&req->r_args.setattr.atime,
2621 &attr->ia_atime);
355da1eb 2622 mask |= CEPH_SETATTR_ATIME;
be70489e
YZ		 2623 release |= CEPH_CAP_FILE_SHARED |
2624 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR;
355da1eb
SW		 2625 }
2626 }
c62498d7 2627 if (ia_valid & ATTR_SIZE) {
38d46409
XL		 2628 doutc(cl, "%p %llx.%llx size %lld -> %lld\n", inode,
2629 ceph_vinop(inode), isize, attr->ia_size);
5c64737d
XL		 2630 /*
2631 * Only when the new size is smaller and not aligned to
2632 * CEPH_FSCRYPT_BLOCK_SIZE will the RMW is needed.
2633 */
2634 if (IS_ENCRYPTED(inode) && attr->ia_size < isize &&
2635 (attr->ia_size % CEPH_FSCRYPT_BLOCK_SIZE)) {
2636 mask |= CEPH_SETATTR_SIZE;
2637 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL |
2638 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR;
2639 set_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags);
2640 mask |= CEPH_SETATTR_FSCRYPT_FILE;
2641 req->r_args.setattr.size =
2642 cpu_to_le64(round_up(attr->ia_size,
2643 CEPH_FSCRYPT_BLOCK_SIZE));
2644 req->r_args.setattr.old_size =
2645 cpu_to_le64(round_up(isize,
2646 CEPH_FSCRYPT_BLOCK_SIZE));
2647 req->r_fscrypt_file = attr->ia_size;
2648 fill_fscrypt = true;
2649 } else if ((issued & CEPH_CAP_FILE_EXCL) && attr->ia_size >= isize) {
e90334e8
XL		 2650 if (attr->ia_size > isize) {
2651 i_size_write(inode, attr->ia_size);
2652 inode->i_blocks = calc_inode_blocks(attr->ia_size);
2653 ci->i_reported_size = attr->ia_size;
2654 dirtied |= CEPH_CAP_FILE_EXCL;
2655 ia_valid |= ATTR_MTIME;
2656 }
c62498d7 2657 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
2d6795fb 2658 attr->ia_size != isize) {
c62498d7
JL		 2659 mask |= CEPH_SETATTR_SIZE;
2660 release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL |
2661 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR;
16be62fc
JL		 2662 if (IS_ENCRYPTED(inode) && attr->ia_size) {
2663 set_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags);
2664 mask |= CEPH_SETATTR_FSCRYPT_FILE;
2665 req->r_args.setattr.size =
2666 cpu_to_le64(round_up(attr->ia_size,
2667 CEPH_FSCRYPT_BLOCK_SIZE));
2668 req->r_args.setattr.old_size =
2669 cpu_to_le64(round_up(isize,
2670 CEPH_FSCRYPT_BLOCK_SIZE));
2671 req->r_fscrypt_file = attr->ia_size;
16be62fc
JL		 2672 } else {
2673 req->r_args.setattr.size = cpu_to_le64(attr->ia_size);
2674 req->r_args.setattr.old_size = cpu_to_le64(isize);
2675 req->r_fscrypt_file = 0;
2676 }
c62498d7
JL		 2677 }
2678 }
355da1eb 2679 if (ia_valid & ATTR_MTIME) {
c453bdb5
JL		 2680 struct timespec64 mtime = inode_get_mtime(inode);
2681
e21165bf
LT		 2682 doutc(cl, "%p %llx.%llx mtime %lld.%09ld -> %lld.%09ld\n",
2683 inode, ceph_vinop(inode),
2684 mtime.tv_sec, mtime.tv_nsec,
2685 attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec);
355da1eb
SW		 2686 if (issued & CEPH_CAP_FILE_EXCL) {
2687 ci->i_time_warp_seq++;
c453bdb5 2688 inode_set_mtime_to_ts(inode, attr->ia_mtime);
355da1eb
SW		 2689 dirtied |= CEPH_CAP_FILE_EXCL;
2690 } else if ((issued & CEPH_CAP_FILE_WR) &&
c453bdb5
JL		 2691 timespec64_compare(&mtime, &attr->ia_mtime) < 0) {
2692 inode_set_mtime_to_ts(inode, attr->ia_mtime);
355da1eb
SW		 2693 dirtied |= CEPH_CAP_FILE_WR;
2694 } else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
c453bdb5 2695 !timespec64_equal(&mtime, &attr->ia_mtime)) {
9bbeab41
AB		 2696 ceph_encode_timespec64(&req->r_args.setattr.mtime,
2697 &attr->ia_mtime);
355da1eb 2698 mask |= CEPH_SETATTR_MTIME;
be70489e
YZ		 2699 release |= CEPH_CAP_FILE_SHARED |
2700 CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR;
355da1eb
SW		 2701 }
2702 }
355da1eb
SW		 2703
2704 /* these do nothing */
2705 if (ia_valid & ATTR_CTIME) {
2706 bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME|
2707 ATTR_MODE|ATTR_UID|ATTR_GID)) == 0;
e21165bf
LT		 2708 doutc(cl, "%p %llx.%llx ctime %lld.%09ld -> %lld.%09ld (%s)\n",
2709 inode, ceph_vinop(inode),
2710 inode_get_ctime_sec(inode),
2711 inode_get_ctime_nsec(inode),
38d46409
XL		 2712 attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec,
2713 only ? "ctime only" : "ignored");
355da1eb
SW		 2714 if (only) {
2715 /*
2716 * if kernel wants to dirty ctime but nothing else,
2717 * we need to choose a cap to dirty under, or do
2718 * a almost-no-op setattr
2719 */
2720 if (issued & CEPH_CAP_AUTH_EXCL)
2721 dirtied |= CEPH_CAP_AUTH_EXCL;
2722 else if (issued & CEPH_CAP_FILE_EXCL)
2723 dirtied |= CEPH_CAP_FILE_EXCL;
2724 else if (issued & CEPH_CAP_XATTR_EXCL)
2725 dirtied |= CEPH_CAP_XATTR_EXCL;
2726 else
2727 mask |= CEPH_SETATTR_CTIME;
2728 }
2729 }
2730 if (ia_valid & ATTR_FILE)
38d46409
XL		 2731 doutc(cl, "%p %llx.%llx ATTR_FILE ... hrm!\n", inode,
2732 ceph_vinop(inode));
355da1eb
SW		 2733
2734 if (dirtied) {
f66fd9f0
YZ		 2735 inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied,
2736 &prealloc_cf);
7795aef0 2737 inode_set_ctime_to_ts(inode, attr->ia_ctime);
b4b924c7 2738 inode_inc_iversion_raw(inode);
355da1eb
SW		 2739 }
2740
2741 release &= issued;
be655596 2742 spin_unlock(&ci->i_ceph_lock);
5c64737d 2743 if (lock_snap_rwsem) {
604d1b02 2744 up_read(&mdsc->snap_rwsem);
5c64737d
XL		 2745 lock_snap_rwsem = false;
2746 }
355da1eb 2747
fca65b4a
SW		 2748 if (inode_dirty_flags)
2749 __mark_inode_dirty(inode, inode_dirty_flags);
2750
355da1eb 2751 if (mask) {
70b666c3
SW		 2752 req->r_inode = inode;
2753 ihold(inode);
355da1eb
SW		 2754 req->r_inode_drop = release;
2755 req->r_args.setattr.mask = cpu_to_le32(mask);
2756 req->r_num_caps = 1;
0ed1e90a 2757 req->r_stamp = attr->ia_ctime;
5c64737d
XL		 2758 if (fill_fscrypt) {
2759 err = fill_fscrypt_truncate(inode, req, attr);
2760 if (err)
2761 goto out;
2762 }
2763
2764 /*
2765 * The truncate request will return -EAGAIN when the
2766 * last block has been updated just before the MDS
2767 * successfully gets the xlock for the FILE lock. To
2768 * avoid corrupting the file contents we need to retry
2769 * it.
2770 */
752c8bdc 2771 err = ceph_mdsc_do_request(mdsc, NULL, req);
5c64737d 2772 if (err == -EAGAIN && truncate_retry--) {
38d46409
XL		 2773 doutc(cl, "%p %llx.%llx result=%d (%s locally, %d remote), retry it!\n",
2774 inode, ceph_vinop(inode), err,
2775 ceph_cap_string(dirtied), mask);
5c64737d
XL		 2776 ceph_mdsc_put_request(req);
2777 ceph_free_cap_flush(prealloc_cf);
2778 goto retry;
2779 }
355da1eb 2780 }
2d332d5b 2781out:
38d46409
XL		 2782 doutc(cl, "%p %llx.%llx result=%d (%s locally, %d remote)\n", inode,
2783 ceph_vinop(inode), err, ceph_cap_string(dirtied), mask);
355da1eb 2784
355da1eb 2785 ceph_mdsc_put_request(req);
f66fd9f0 2786 ceph_free_cap_flush(prealloc_cf);
8179a101
YZ		 2787
2788 if (err >= 0 && (mask & CEPH_SETATTR_SIZE))
2789 __ceph_do_pending_vmtruncate(inode);
2790
355da1eb
SW		 2791 return err;
2792}
2793
a26fecca
AG		 2794/*
2795 * setattr
2796 */
c1632a0f 2797int ceph_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
549c7297 2798 struct iattr *attr)
a26fecca 2799{
fd5472ed 2800 struct inode *inode = d_inode(dentry);
5995d90d 2801 struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode);
fd5472ed
JK		 2802 int err;
2803
2804 if (ceph_snap(inode) != CEPH_NOSNAP)
2805 return -EROFS;
2806
5d6451b1
JL		 2807 if (ceph_inode_is_shutdown(inode))
2808 return -ESTALE;
2809
94af0470
JL		 2810 err = fscrypt_prepare_setattr(dentry, attr);
2811 if (err)
2812 return err;
2813
a04aff25 2814 err = setattr_prepare(idmap, dentry, attr);
fd5472ed
JK		 2815 if (err != 0)
2816 return err;
2817
36a4c72d 2818 if ((attr->ia_valid & ATTR_SIZE) &&
2d6795fb 2819 attr->ia_size > max(i_size_read(inode), fsc->max_file_size))
36a4c72d
CX		 2820 return -EFBIG;
2821
2b83845f
LH		 2822 if ((attr->ia_valid & ATTR_SIZE) &&
2823 ceph_quota_is_max_bytes_exceeded(inode, attr->ia_size))
2824 return -EDQUOT;
2825
79c66a0c 2826 err = __ceph_setattr(idmap, inode, attr, NULL);
8179a101
YZ		 2827
2828 if (err >= 0 && (attr->ia_valid & ATTR_MODE))
a04aff25 2829 err = posix_acl_chmod(idmap, dentry, attr->ia_mode);
8179a101
YZ		 2830
2831 return err;
a26fecca
AG		 2832}
2833
5eed80fb
XL		 2834int ceph_try_to_choose_auth_mds(struct inode *inode, int mask)
2835{
2836 int issued = ceph_caps_issued(ceph_inode(inode));
2837
2838 /*
2839 * If any 'x' caps is issued we can just choose the auth MDS
2840 * instead of the random replica MDSes. Because only when the
2841 * Locker is in LOCK_EXEC state will the loner client could
2842 * get the 'x' caps. And if we send the getattr requests to
2843 * any replica MDS it must auth pin and tries to rdlock from
2844 * the auth MDS, and then the auth MDS need to do the Locker
2845 * state transition to LOCK_SYNC. And after that the lock state
2846 * will change back.
2847 *
2848 * This cost much when doing the Locker state transition and
2849 * usually will need to revoke caps from clients.
8266c4d7
XL		 2850 *
2851 * And for the 'Xs' caps for getxattr we will also choose the
2852 * auth MDS, because the MDS side code is buggy due to setxattr
2853 * won't notify the replica MDSes when the values changed and
2854 * the replica MDS will return the old values. Though we will
2855 * fix it in MDS code, but this still makes sense for old ceph.
5eed80fb
XL		 2856 */
2857 if (((mask & CEPH_CAP_ANY_SHARED) && (issued & CEPH_CAP_ANY_EXCL))
8266c4d7 2858 || (mask & (CEPH_STAT_RSTAT | CEPH_STAT_CAP_XATTR)))
5eed80fb
XL		 2859 return USE_AUTH_MDS;
2860 else
2861 return USE_ANY_MDS;
2862}
2863
355da1eb
SW		 2864/*
2865 * Verify that we have a lease on the given mask. If not,
2866 * do a getattr against an mds.
2867 */
01deead0
YZ		 2868int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
2869 int mask, bool force)
355da1eb 2870{
5995d90d 2871 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(inode->i_sb);
38d46409 2872 struct ceph_client *cl = fsc->client;
3d14c5d2 2873 struct ceph_mds_client *mdsc = fsc->mdsc;
355da1eb 2874 struct ceph_mds_request *req;
49a9f4f6 2875 int mode;
355da1eb
SW		 2876 int err;
2877
2878 if (ceph_snap(inode) == CEPH_SNAPDIR) {
38d46409
XL		 2879 doutc(cl, "inode %p %llx.%llx SNAPDIR\n", inode,
2880 ceph_vinop(inode));
355da1eb
SW		 2881 return 0;
2882 }
2883
38d46409
XL		 2884 doutc(cl, "inode %p %llx.%llx mask %s mode 0%o\n", inode,
2885 ceph_vinop(inode), ceph_cap_string(mask), inode->i_mode);
1af16d54
XL		 2886 if (!force && ceph_caps_issued_mask_metric(ceph_inode(inode), mask, 1))
2887 return 0;
355da1eb 2888
5eed80fb 2889 mode = ceph_try_to_choose_auth_mds(inode, mask);
49a9f4f6 2890 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, mode);
355da1eb
SW		 2891 if (IS_ERR(req))
2892 return PTR_ERR(req);
70b666c3
SW		 2893 req->r_inode = inode;
2894 ihold(inode);
355da1eb
SW		 2895 req->r_num_caps = 1;
2896 req->r_args.getattr.mask = cpu_to_le32(mask);
01deead0 2897 req->r_locked_page = locked_page;
355da1eb 2898 err = ceph_mdsc_do_request(mdsc, NULL, req);
01deead0
YZ		 2899 if (locked_page && err == 0) {
2900 u64 inline_version = req->r_reply_info.targeti.inline_version;
2901 if (inline_version == 0) {
2902 /* the reply is supposed to contain inline data */
2903 err = -EINVAL;
48490776
XL		 2904 } else if (inline_version == CEPH_INLINE_NONE ||
2905 inline_version == 1) {
01deead0
YZ		 2906 err = -ENODATA;
2907 } else {
2908 err = req->r_reply_info.targeti.inline_len;
2909 }
2910 }
355da1eb 2911 ceph_mdsc_put_request(req);
38d46409 2912 doutc(cl, "result=%d\n", err);
355da1eb
SW		 2913 return err;
2914}
2915
6ddf5f16
MC		 2916int ceph_do_getvxattr(struct inode *inode, const char *name, void *value,
2917 size_t size)
2918{
5995d90d 2919 struct ceph_fs_client *fsc = ceph_sb_to_fs_client(inode->i_sb);
38d46409 2920 struct ceph_client *cl = fsc->client;
6ddf5f16
MC		 2921 struct ceph_mds_client *mdsc = fsc->mdsc;
2922 struct ceph_mds_request *req;
2923 int mode = USE_AUTH_MDS;
2924 int err;
2925 char *xattr_value;
2926 size_t xattr_value_len;
2927
2928 req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETVXATTR, mode);
2929 if (IS_ERR(req)) {
2930 err = -ENOMEM;
2931 goto out;
2932 }
2933
6eb06c46 2934 req->r_feature_needed = CEPHFS_FEATURE_OP_GETVXATTR;
6ddf5f16
MC		 2935 req->r_path2 = kstrdup(name, GFP_NOFS);
2936 if (!req->r_path2) {
2937 err = -ENOMEM;
2938 goto put;
2939 }
2940
2941 ihold(inode);
2942 req->r_inode = inode;
2943 err = ceph_mdsc_do_request(mdsc, NULL, req);
2944 if (err < 0)
2945 goto put;
2946
2947 xattr_value = req->r_reply_info.xattr_info.xattr_value;
2948 xattr_value_len = req->r_reply_info.xattr_info.xattr_value_len;
2949
38d46409 2950 doutc(cl, "xattr_value_len:%zu, size:%zu\n", xattr_value_len, size);
6ddf5f16
MC		 2951
2952 err = (int)xattr_value_len;
2953 if (size == 0)
2954 goto put;
2955
2956 if (xattr_value_len > size) {
2957 err = -ERANGE;
2958 goto put;
2959 }
2960
2961 memcpy(value, xattr_value, xattr_value_len);
2962put:
2963 ceph_mdsc_put_request(req);
2964out:
38d46409 2965 doutc(cl, "result=%d\n", err);
6ddf5f16
MC		 2966 return err;
2967}
2968
355da1eb
SW		 2969
2970/*
2971 * Check inode permissions. We verify we have a valid value for
2972 * the AUTH cap, then call the generic handler.
2973 */
4609e1f1 2974int ceph_permission(struct mnt_idmap *idmap, struct inode *inode,
549c7297 2975 int mask)
355da1eb 2976{
b74c79e9
NP		 2977 int err;
2978
10556cb2 2979 if (mask & MAY_NOT_BLOCK)
b74c79e9
NP		 2980 return -ECHILD;
2981
508b32d8 2982 err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false);
355da1eb
SW		 2983
2984 if (!err)
8995375f 2985 err = generic_permission(idmap, inode, mask);
355da1eb
SW		 2986 return err;
2987}
2988
428bb68a 2989/* Craft a mask of needed caps given a set of requested statx attrs. */
04fabb11 2990static int statx_to_caps(u32 want, umode_t mode)
428bb68a
JL		 2991{
2992 int mask = 0;
2993
f6102994 2994 if (want & (STATX_MODE|STATX_UID|STATX_GID|STATX_CTIME|STATX_BTIME|STATX_CHANGE_COOKIE))
428bb68a
JL		 2995 mask |= CEPH_CAP_AUTH_SHARED;
2996
f6102994 2997 if (want & (STATX_NLINK|STATX_CTIME|STATX_CHANGE_COOKIE)) {
04fabb11
JL		 2998 /*
2999 * The link count for directories depends on inode->i_subdirs,
3000 * and that is only updated when Fs caps are held.
3001 */
3002 if (S_ISDIR(mode))
3003 mask |= CEPH_CAP_FILE_SHARED;
3004 else
3005 mask |= CEPH_CAP_LINK_SHARED;
3006 }
428bb68a 3007
f6102994 3008 if (want & (STATX_ATIME|STATX_MTIME|STATX_CTIME|STATX_SIZE|STATX_BLOCKS|STATX_CHANGE_COOKIE))
428bb68a
JL		 3009 mask |= CEPH_CAP_FILE_SHARED;
3010
f6102994 3011 if (want & (STATX_CTIME|STATX_CHANGE_COOKIE))
428bb68a
JL		 3012 mask |= CEPH_CAP_XATTR_SHARED;
3013
3014 return mask;
3015}
3016
355da1eb 3017/*
428bb68a
JL		 3018 * Get all the attributes. If we have sufficient caps for the requested attrs,
3019 * then we can avoid talking to the MDS at all.
355da1eb 3020 */
b74d24f7 3021int ceph_getattr(struct mnt_idmap *idmap, const struct path *path,
549c7297 3022 struct kstat *stat, u32 request_mask, unsigned int flags)
355da1eb 3023{
a528d35e 3024 struct inode *inode = d_inode(path->dentry);
aa87052d 3025 struct super_block *sb = inode->i_sb;
232d4b01 3026 struct ceph_inode_info *ci = ceph_inode(inode);
58981784 3027 u32 valid_mask = STATX_BASIC_STATS;
428bb68a 3028 int err = 0;
355da1eb 3029
5d6451b1
JL		 3030 if (ceph_inode_is_shutdown(inode))
3031 return -ESTALE;
3032
428bb68a 3033 /* Skip the getattr altogether if we're asked not to sync */
261998c3 3034 if ((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) {
04fabb11
JL		 3035 err = ceph_do_getattr(inode,
3036 statx_to_caps(request_mask, inode->i_mode),
3037 flags & AT_STATX_FORCE_SYNC);
428bb68a
JL		 3038 if (err)
3039 return err;
3040 }
3041
0513043e 3042 generic_fillattr(idmap, request_mask, inode, stat);
ebce3eb2 3043 stat->ino = ceph_present_inode(inode);
58981784
JL		 3044
3045 /*
3046 * btime on newly-allocated inodes is 0, so if this is still set to
3047 * that, then assume that it's not valid.
3048 */
3049 if (ci->i_btime.tv_sec || ci->i_btime.tv_nsec) {
3050 stat->btime = ci->i_btime;
3051 valid_mask |= STATX_BTIME;
3052 }
3053
f6102994
JL		 3054 if (request_mask & STATX_CHANGE_COOKIE) {
3055 stat->change_cookie = inode_peek_iversion_raw(inode);
3056 valid_mask |= STATX_CHANGE_COOKIE;
3057 }
3058
428bb68a 3059 if (ceph_snap(inode) == CEPH_NOSNAP)
aa87052d 3060 stat->dev = sb->s_dev;
428bb68a
JL		 3061 else
3062 stat->dev = ci->i_snapid_map ? ci->i_snapid_map->dev : 0;
3063
3064 if (S_ISDIR(inode->i_mode)) {
5995d90d 3065 if (ceph_test_mount_opt(ceph_sb_to_fs_client(sb), RBYTES)) {
428bb68a 3066 stat->size = ci->i_rbytes;
aa87052d
XL		 3067 } else if (ceph_snap(inode) == CEPH_SNAPDIR) {
3068 struct ceph_inode_info *pci;
3069 struct ceph_snap_realm *realm;
3070 struct inode *parent;
3071
3072 parent = ceph_lookup_inode(sb, ceph_ino(inode));
f86a4866 3073 if (IS_ERR(parent))
aa87052d
XL		 3074 return PTR_ERR(parent);
3075
3076 pci = ceph_inode(parent);
3077 spin_lock(&pci->i_ceph_lock);
3078 realm = pci->i_snap_realm;
3079 if (realm)
3080 stat->size = realm->num_snaps;
3081 else
3082 stat->size = 0;
3083 spin_unlock(&pci->i_ceph_lock);
3084 iput(parent);
3085 } else {
428bb68a 3086 stat->size = ci->i_files + ci->i_subdirs;
aa87052d 3087 }
428bb68a
JL		 3088 stat->blocks = 0;
3089 stat->blksize = 65536;
3090 /*
3091 * Some applications rely on the number of st_nlink
3092 * value on directories to be either 0 (if unlinked)
3093 * or 2 + number of subdirectories.
3094 */
3095 if (stat->nlink == 1)
3096 /* '.' + '..' + subdirs */
3097 stat->nlink = 1 + 1 + ci->i_subdirs;
355da1eb 3098 }
428bb68a 3099
f6102994 3100 stat->attributes |= STATX_ATTR_CHANGE_MONOTONIC;
94af0470
JL		 3101 if (IS_ENCRYPTED(inode))
3102 stat->attributes |= STATX_ATTR_ENCRYPTED;
3103 stat->attributes_mask |= (STATX_ATTR_CHANGE_MONOTONIC |
3104 STATX_ATTR_ENCRYPTED);
3105
58981784 3106 stat->result_mask = request_mask & valid_mask;
355da1eb
SW		 3107 return err;
3108}
5d6451b1
JL		 3109
3110void ceph_inode_shutdown(struct inode *inode)
3111{
3112 struct ceph_inode_info *ci = ceph_inode(inode);
3113 struct rb_node *p;
3114 int iputs = 0;
3115 bool invalidate = false;
3116
3117 spin_lock(&ci->i_ceph_lock);
3118 ci->i_ceph_flags |= CEPH_I_SHUTDOWN;
3119 p = rb_first(&ci->i_caps);
3120 while (p) {
3121 struct ceph_cap *cap = rb_entry(p, struct ceph_cap, ci_node);
3122
3123 p = rb_next(p);
3124 iputs += ceph_purge_inode_cap(inode, cap, &invalidate);
3125 }
3126 spin_unlock(&ci->i_ceph_lock);
3127
3128 if (invalidate)
3129 ceph_queue_invalidate(inode);
3130 while (iputs--)
3131 iput(inode);
3132}
Linux 6.x block layer and io_uring tree(s)