4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
33 #include <linux/sched.h>
35 #include <linux/file.h>
36 #include <linux/quotaops.h>
37 #include <linux/highmem.h>
38 #include <linux/pagemap.h>
39 #include <linux/user_namespace.h>
40 #include <linux/uidgid.h>
42 #define DEBUG_SUBSYSTEM S_LLITE
44 #include <obd_support.h>
45 #include <lustre_fid.h>
46 #include <lustre_dlm.h>
47 #include "llite_internal.h"
49 static int ll_create_it(struct inode *dir, struct dentry *dentry,
50 struct lookup_intent *it,
51 void *secctx, __u32 secctxlen, bool encrypt,
52 void *encctx, __u32 encctxlen);
54 /* called from iget5_locked->find_inode() under inode_lock spinlock */
55 static int ll_test_inode(struct inode *inode, void *opaque)
57 struct ll_inode_info *lli = ll_i2info(inode);
58 struct lustre_md *md = opaque;
60 if (unlikely(!(md->body->mbo_valid & OBD_MD_FLID))) {
61 CERROR("MDS body missing FID\n");
65 if (!lu_fid_eq(&lli->lli_fid, &md->body->mbo_fid1))
71 static int ll_set_inode(struct inode *inode, void *opaque)
73 struct ll_inode_info *lli = ll_i2info(inode);
74 struct mdt_body *body = ((struct lustre_md *)opaque)->body;
76 if (unlikely(!(body->mbo_valid & OBD_MD_FLID))) {
77 CERROR("MDS body missing FID\n");
81 lli->lli_fid = body->mbo_fid1;
82 if (unlikely(!(body->mbo_valid & OBD_MD_FLTYPE))) {
83 CERROR("Can not initialize inode "DFID" without object type: "
85 PFID(&lli->lli_fid), body->mbo_valid);
89 inode->i_mode = (inode->i_mode & ~S_IFMT) | (body->mbo_mode & S_IFMT);
90 if (unlikely(inode->i_mode == 0)) {
91 CERROR("Invalid inode "DFID" type\n", PFID(&lli->lli_fid));
102 * Get an inode by inode number(@hash), which is already instantiated by
103 * the intent lookup).
105 struct inode *ll_iget(struct super_block *sb, ino_t hash,
106 struct lustre_md *md)
114 inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
116 RETURN(ERR_PTR(-ENOMEM));
118 if (inode->i_state & I_NEW) {
119 rc = ll_read_inode2(inode, md);
120 if (rc == 0 && S_ISREG(inode->i_mode) &&
121 ll_i2info(inode)->lli_clob == NULL)
122 rc = cl_file_inode_init(inode, md);
125 /* Let's clear directory lsm here, otherwise
126 * make_bad_inode() will reset the inode mode
127 * to regular, then ll_clear_inode will not
128 * be able to clear lsm_md */
129 if (S_ISDIR(inode->i_mode))
130 ll_dir_clear_lsm_md(inode);
131 make_bad_inode(inode);
132 unlock_new_inode(inode);
136 inode_has_no_xattr(inode);
137 unlock_new_inode(inode);
139 } else if (is_bad_inode(inode)) {
141 inode = ERR_PTR(-ESTALE);
142 } else if (!(inode->i_state & (I_FREEING | I_CLEAR))) {
143 rc = ll_update_inode(inode, md);
144 CDEBUG(D_VFSTRACE, "got inode: "DFID"(%p): rc = %d\n",
145 PFID(&md->body->mbo_fid1), inode, rc);
147 if (S_ISDIR(inode->i_mode))
148 ll_dir_clear_lsm_md(inode);
157 /* mark negative sub file dentries invalid and prune unused dentries */
158 static void ll_prune_negative_children(struct inode *dir)
160 struct dentry *dentry;
161 struct dentry *child;
166 spin_lock(&dir->i_lock);
167 hlist_for_each_entry(dentry, &dir->i_dentry, d_alias) {
168 spin_lock(&dentry->d_lock);
169 list_for_each_entry(child, &dentry->d_subdirs, d_child) {
173 spin_lock_nested(&child->d_lock, DENTRY_D_LOCK_NESTED);
174 if (lld_is_init(child))
175 ll_d2d(child)->lld_invalid = 1;
176 if (!ll_d_count(child)) {
179 spin_unlock(&child->d_lock);
180 spin_unlock(&dentry->d_lock);
181 spin_unlock(&dir->i_lock);
183 CDEBUG(D_DENTRY, "prune negative dentry %pd\n",
189 spin_unlock(&child->d_lock);
191 spin_unlock(&dentry->d_lock);
193 spin_unlock(&dir->i_lock);
198 int ll_test_inode_by_fid(struct inode *inode, void *opaque)
200 return lu_fid_eq(&ll_i2info(inode)->lli_fid, opaque);
203 static int ll_dom_lock_cancel(struct inode *inode, struct ldlm_lock *lock)
206 struct ll_inode_info *lli = ll_i2info(inode);
211 env = cl_env_get(&refcheck);
213 RETURN(PTR_ERR(env));
215 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_REPLAY_PAUSE, cfs_fail_val);
217 /* reach MDC layer to flush data under the DoM ldlm lock */
218 rc = cl_object_flush(env, lli->lli_clob, lock);
219 if (rc == -ENODATA) {
220 CDEBUG(D_INODE, "inode "DFID" layout has no DoM stripe\n",
221 PFID(ll_inode2fid(inode)));
222 /* most likely result of layout change, do nothing */
226 cl_env_put(env, &refcheck);
230 static void ll_lock_cancel_bits(struct ldlm_lock *lock, __u64 to_cancel)
232 struct inode *inode = ll_inode_from_resource_lock(lock);
233 struct ll_inode_info *lli;
234 __u64 bits = to_cancel;
240 /* That means the inode is evicted most likely and may cause
241 * the skipping of lock cleanups below, so print the message
244 if (lock->l_resource->lr_lvb_inode)
246 "can't take inode for the lock (%sevicted)\n",
247 lock->l_resource->lr_lvb_inode->i_state &
248 I_FREEING ? "" : "not ");
252 if (!fid_res_name_eq(ll_inode2fid(inode),
253 &lock->l_resource->lr_name)) {
254 LDLM_ERROR(lock, "data mismatch with object "DFID"(%p)",
255 PFID(ll_inode2fid(inode)), inode);
259 if (bits & MDS_INODELOCK_XATTR) {
260 ll_xattr_cache_destroy(inode);
261 bits &= ~MDS_INODELOCK_XATTR;
264 /* For OPEN locks we differentiate between lock modes
265 * LCK_CR, LCK_CW, LCK_PR - bug 22891 */
266 if (bits & MDS_INODELOCK_OPEN)
267 ll_have_md_lock(inode, &bits, lock->l_req_mode);
269 if (bits & MDS_INODELOCK_OPEN) {
272 switch (lock->l_req_mode) {
283 LDLM_ERROR(lock, "bad lock mode for OPEN lock");
287 ll_md_real_close(inode, fmode);
289 bits &= ~MDS_INODELOCK_OPEN;
292 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
293 MDS_INODELOCK_LAYOUT | MDS_INODELOCK_PERM |
295 ll_have_md_lock(inode, &bits, LCK_MINMODE);
297 if (bits & MDS_INODELOCK_DOM) {
298 rc = ll_dom_lock_cancel(inode, lock);
300 CDEBUG(D_INODE, "cannot flush DoM data "
302 PFID(ll_inode2fid(inode)), rc);
305 if (bits & MDS_INODELOCK_LAYOUT) {
306 struct cl_object_conf conf = {
307 .coc_opc = OBJECT_CONF_INVALIDATE,
311 rc = ll_layout_conf(inode, &conf);
313 CDEBUG(D_INODE, "cannot invalidate layout of "
315 PFID(ll_inode2fid(inode)), rc);
318 lli = ll_i2info(inode);
320 if (bits & MDS_INODELOCK_UPDATE)
321 set_bit(LLIF_UPDATE_ATIME, &lli->lli_flags);
323 if ((bits & MDS_INODELOCK_UPDATE) && S_ISDIR(inode->i_mode)) {
324 CDEBUG(D_INODE, "invalidating inode "DFID" lli = %p, "
325 "pfid = "DFID"\n", PFID(ll_inode2fid(inode)),
326 lli, PFID(&lli->lli_pfid));
327 truncate_inode_pages(inode->i_mapping, 0);
329 if (unlikely(!fid_is_zero(&lli->lli_pfid))) {
330 struct inode *master_inode = NULL;
333 /* This is slave inode, since all of the child dentry
334 * is connected on the master inode, so we have to
335 * invalidate the negative children on master inode */
336 CDEBUG(D_INODE, "Invalidate s"DFID" m"DFID"\n",
337 PFID(ll_inode2fid(inode)), PFID(&lli->lli_pfid));
339 hash = cl_fid_build_ino(&lli->lli_pfid,
340 ll_need_32bit_api(ll_i2sbi(inode)));
342 /* Do not lookup the inode with ilookup5, otherwise
343 * it will cause dead lock,
344 * 1. Client1 send chmod req to the MDT0, then on MDT0,
345 * it enqueues master and all of its slaves lock,
346 * (mdt_attr_set() -> mdt_lock_slaves()), after gets
347 * master and stripe0 lock, it will send the enqueue
348 * req (for stripe1) to MDT1, then MDT1 finds the lock
349 * has been granted to client2. Then MDT1 sends blocking
351 * 2. At the same time, client2 tries to unlink
352 * the striped dir (rm -rf striped_dir), and during
353 * lookup, it will hold the master inode of the striped
354 * directory, whose inode state is NEW, then tries to
355 * revalidate all of its slaves, (ll_prep_inode()->
356 * ll_iget()->ll_read_inode2()-> ll_update_inode().).
357 * And it will be blocked on the server side because
359 * 3. Then the client get the blocking_ast req, cancel
360 * the lock, but being blocked if using ->ilookup5()),
361 * because master inode state is NEW. */
362 master_inode = ilookup5_nowait(inode->i_sb, hash,
363 ll_test_inode_by_fid,
364 (void *)&lli->lli_pfid);
366 ll_prune_negative_children(master_inode);
370 ll_prune_negative_children(inode);
374 if ((bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM)) &&
375 !is_root_inode(inode))
376 ll_prune_aliases(inode);
378 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM))
379 forget_all_cached_acls(inode);
385 /* Check if the given lock may be downgraded instead of canceling and
386 * that convert is really needed. */
387 int ll_md_need_convert(struct ldlm_lock *lock)
389 struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
391 __u64 wanted = lock->l_policy_data.l_inodebits.cancel_bits;
392 __u64 bits = lock->l_policy_data.l_inodebits.bits & ~wanted;
393 enum ldlm_mode mode = LCK_MINMODE;
395 if (!lock->l_conn_export ||
396 !exp_connect_lock_convert(lock->l_conn_export))
399 if (!wanted || !bits || ldlm_is_cancel(lock))
402 /* do not convert locks other than DOM for now */
403 if (!((bits | wanted) & MDS_INODELOCK_DOM))
406 /* We may have already remaining bits in some other lock so
407 * lock convert will leave us just extra lock for the same bit.
408 * Check if client has other lock with the same bits and the same
409 * or lower mode and don't convert if any.
411 switch (lock->l_req_mode) {
425 /* do not convert other modes */
429 /* is lock is too old to be converted? */
430 lock_res_and_lock(lock);
431 if (ktime_after(ktime_get(),
432 ktime_add(lock->l_last_used, ns->ns_dirty_age_limit))) {
433 unlock_res_and_lock(lock);
436 unlock_res_and_lock(lock);
438 inode = ll_inode_from_resource_lock(lock);
439 ll_have_md_lock(inode, &bits, mode);
444 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *ld,
445 void *data, int flag)
447 struct lustre_handle lockh;
453 case LDLM_CB_BLOCKING:
455 __u64 cancel_flags = LCF_ASYNC;
457 /* if lock convert is not needed then still have to
458 * pass lock via ldlm_cli_convert() to keep all states
459 * correct, set cancel_bits to full lock bits to cause
460 * full cancel to happen.
462 if (!ll_md_need_convert(lock)) {
463 lock_res_and_lock(lock);
464 lock->l_policy_data.l_inodebits.cancel_bits =
465 lock->l_policy_data.l_inodebits.bits;
466 unlock_res_and_lock(lock);
468 rc = ldlm_cli_convert(lock, cancel_flags);
471 /* continue with cancel otherwise */
472 ldlm_lock2handle(lock, &lockh);
473 rc = ldlm_cli_cancel(&lockh, cancel_flags);
475 CDEBUG(D_INODE, "ldlm_cli_cancel: rc = %d\n", rc);
480 case LDLM_CB_CANCELING:
482 __u64 to_cancel = lock->l_policy_data.l_inodebits.bits;
484 /* Nothing to do for non-granted locks */
485 if (!ldlm_is_granted(lock))
488 /* If 'ld' is supplied then bits to be cancelled are passed
489 * implicitly by lock converting and cancel_bits from 'ld'
490 * should be used. Otherwise full cancel is being performed
491 * and lock inodebits are used.
493 * Note: we cannot rely on cancel_bits in lock itself at this
494 * moment because they can be changed by concurrent thread,
495 * so ldlm_cli_inodebits_convert() pass cancel bits implicitly
499 /* partial bits cancel allowed only during convert */
500 LASSERT(ldlm_is_converting(lock));
501 /* mask cancel bits by lock bits so only no any unused
502 * bits are passed to ll_lock_cancel_bits()
504 to_cancel &= ld->l_policy_data.l_inodebits.cancel_bits;
506 ll_lock_cancel_bits(lock, to_cancel);
516 __u32 ll_i2suppgid(struct inode *i)
518 if (in_group_p(i->i_gid))
519 return (__u32)from_kgid(&init_user_ns, i->i_gid);
521 return (__u32) __kgid_val(INVALID_GID);
524 /* Pack the required supplementary groups into the supplied groups array.
525 * If we don't need to use the groups from the target inode(s) then we
526 * instead pack one or more groups from the user's supplementary group
527 * array in case it might be useful. Not needed if doing an MDS-side upcall. */
528 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
531 LASSERT(suppgids != NULL);
533 suppgids[0] = ll_i2suppgid(i1);
536 suppgids[1] = ll_i2suppgid(i2);
542 * try to reuse three types of dentry:
543 * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
544 * by concurrent .revalidate).
545 * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
546 * be cleared by others calling d_lustre_revalidate).
547 * 3. DISCONNECTED alias.
549 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
551 struct dentry *alias, *discon_alias, *invalid_alias;
553 if (hlist_empty(&inode->i_dentry))
556 discon_alias = invalid_alias = NULL;
558 spin_lock(&inode->i_lock);
559 hlist_for_each_entry(alias, &inode->i_dentry, d_alias) {
560 LASSERT(alias != dentry);
562 spin_lock(&alias->d_lock);
563 if ((alias->d_flags & DCACHE_DISCONNECTED) &&
564 S_ISDIR(inode->i_mode))
565 /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
566 discon_alias = alias;
567 else if (alias->d_parent == dentry->d_parent &&
568 alias->d_name.hash == dentry->d_name.hash &&
569 alias->d_name.len == dentry->d_name.len &&
570 memcmp(alias->d_name.name, dentry->d_name.name,
571 dentry->d_name.len) == 0)
572 invalid_alias = alias;
573 spin_unlock(&alias->d_lock);
578 alias = invalid_alias ?: discon_alias ?: NULL;
580 spin_lock(&alias->d_lock);
582 spin_unlock(&alias->d_lock);
584 spin_unlock(&inode->i_lock);
590 * Similar to d_splice_alias(), but lustre treats invalid alias
591 * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
593 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
598 new = ll_find_alias(inode, de);
600 if (!ll_d_setup(new, true))
601 return ERR_PTR(-ENOMEM);
605 "Reuse dentry %p inode %p refc %d flags %#x\n",
606 new, new->d_inode, ll_d_count(new), new->d_flags);
610 if (!ll_d_setup(de, false))
611 return ERR_PTR(-ENOMEM);
614 /* this needs only to be done for foreign symlink dirs as
615 * DCACHE_SYMLINK_TYPE is already set by d_flags_for_inode()
616 * kernel routine for files with symlink ops (ie, real symlink)
618 if (inode && S_ISDIR(inode->i_mode) &&
619 ll_sbi_has_foreign_symlink(ll_i2sbi(inode)) &&
620 #ifdef HAVE_IOP_GET_LINK
621 inode->i_op->get_link) {
623 inode->i_op->follow_link) {
625 CDEBUG(D_INFO, "%s: inode "DFID": faking foreign dir as a symlink\n",
626 ll_i2sbi(inode)->ll_fsname, PFID(ll_inode2fid(inode)));
627 spin_lock(&de->d_lock);
628 /* like d_flags_for_inode() already does for files */
629 de->d_flags = (de->d_flags & ~DCACHE_ENTRY_TYPE) |
631 spin_unlock(&de->d_lock);
634 CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
635 de, de->d_inode, ll_d_count(de), de->d_flags);
639 static int ll_lookup_it_finish(struct ptlrpc_request *request,
640 struct lookup_intent *it,
641 struct inode *parent, struct dentry **de,
642 void *secctx, __u32 secctxlen,
643 void *encctx, __u32 encctxlen,
644 ktime_t kstart, bool encrypt)
646 struct inode *inode = NULL;
649 struct dentry *alias;
652 /* NB 1 request reference will be taken away by ll_intent_lock()
654 CDEBUG(D_DENTRY, "it %p it_disposition %x\n", it,
656 if (!it_disposition(it, DISP_LOOKUP_NEG)) {
657 struct req_capsule *pill = &request->rq_pill;
658 struct mdt_body *body = req_capsule_server_get(pill,
661 rc = ll_prep_inode(&inode, &request->rq_pill, (*de)->d_sb, it);
665 /* If encryption context was returned by MDT, put it in
666 * inode now to save an extra getxattr and avoid deadlock.
668 if (body->mbo_valid & OBD_MD_ENCCTX) {
669 encctx = req_capsule_server_get(pill, &RMF_FILE_ENCCTX);
670 encctxlen = req_capsule_get_size(pill,
676 "server returned encryption ctx for "DFID"\n",
677 PFID(ll_inode2fid(inode)));
678 rc = ll_xattr_cache_insert(inode,
679 LL_XATTR_NAME_ENCRYPTION_CONTEXT,
682 CWARN("%s: cannot set enc ctx for "DFID": rc = %d\n",
683 ll_i2sbi(inode)->ll_fsname,
684 PFID(ll_inode2fid(inode)), rc);
686 rc = llcrypt_get_encryption_info(inode);
689 "cannot get enc info for "DFID": rc = %d\n",
690 PFID(ll_inode2fid(inode)), rc);
695 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
696 /* OPEN can return data if lock has DoM+LAYOUT bits set */
697 if (it->it_op & IT_OPEN &&
698 bits & MDS_INODELOCK_DOM && bits & MDS_INODELOCK_LAYOUT)
699 ll_dom_finish_open(inode, request);
701 /* We used to query real size from OSTs here, but actually
702 * this is not needed. For stat() calls size would be updated
703 * from subsequent do_revalidate()->ll_inode_revalidate_it() in
705 * vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
706 * Everybody else who needs correct file size would call
707 * ll_glimpse_size or some equivalent themselves anyway.
711 /* If security context was returned by MDT, put it in
712 * inode now to save an extra getxattr from security hooks,
713 * and avoid deadlock.
715 if (body->mbo_valid & OBD_MD_SECCTX) {
716 secctx = req_capsule_server_get(pill, &RMF_FILE_SECCTX);
717 secctxlen = req_capsule_get_size(pill,
722 CDEBUG(D_SEC, "server returned security context"
724 PFID(ll_inode2fid(inode)));
727 if (secctx != NULL && secctxlen != 0) {
728 /* no need to protect selinux_inode_setsecurity() by
729 * inode_lock. Taking it would lead to a client deadlock
732 rc = security_inode_notifysecctx(inode, secctx,
735 CWARN("%s: cannot set security context for "DFID": rc = %d\n",
736 ll_i2sbi(inode)->ll_fsname,
737 PFID(ll_inode2fid(inode)),
742 /* Only hash *de if it is unhashed (new dentry).
743 * Atoimc_open may passin hashed dentries for open.
745 alias = ll_splice_alias(inode, *de);
747 GOTO(out, rc = PTR_ERR(alias));
751 if (!it_disposition(it, DISP_LOOKUP_NEG)) {
752 /* we have lookup look - unhide dentry */
753 if (bits & MDS_INODELOCK_LOOKUP) {
754 d_lustre_revalidate(*de);
755 ll_update_dir_depth(parent, (*de)->d_inode);
759 rc = llcrypt_get_encryption_info(inode);
762 if (!llcrypt_has_encryption_key(inode))
763 GOTO(out, rc = -ENOKEY);
765 } else if (!it_disposition(it, DISP_OPEN_CREATE)) {
767 * If file was created on the server, the dentry is revalidated
768 * in ll_create_it if the lock allows for it.
770 /* Check that parent has UPDATE lock. */
771 struct lookup_intent parent_it = {
773 .it_lock_handle = 0 };
774 struct lu_fid fid = ll_i2info(parent)->lli_fid;
776 /* If it is striped directory, get the real stripe parent */
777 if (unlikely(ll_dir_striped(parent))) {
778 rc = md_get_fid_from_lsm(ll_i2mdexp(parent),
779 ll_i2info(parent)->lli_lsm_md,
781 (*de)->d_name.len, &fid);
786 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it, &fid,
788 d_lustre_revalidate(*de);
789 ll_intent_release(&parent_it);
793 if (it_disposition(it, DISP_OPEN_CREATE)) {
794 ll_stats_ops_tally(ll_i2sbi(parent), LPROC_LL_MKNOD,
795 ktime_us_delta(ktime_get(), kstart));
801 if (rc != 0 && it->it_op & IT_OPEN) {
802 ll_intent_drop_lock(it);
803 ll_open_cleanup((*de)->d_sb, &request->rq_pill);
809 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
810 struct lookup_intent *it,
811 void **secctx, __u32 *secctxlen,
812 struct pcc_create_attach *pca,
814 void **encctx, __u32 *encctxlen)
816 ktime_t kstart = ktime_get();
817 struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
818 struct dentry *save = dentry, *retval;
819 struct ptlrpc_request *req = NULL;
820 struct md_op_data *op_data = NULL;
821 struct lov_user_md *lum = NULL;
824 char secctx_name[XATTR_NAME_MAX + 1];
825 struct llcrypt_name fname;
829 if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
830 RETURN(ERR_PTR(-ENAMETOOLONG));
832 CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p), intent=%s\n",
833 dentry, PFID(ll_inode2fid(parent)), parent, LL_IT2STR(it));
835 if (d_mountpoint(dentry))
836 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
838 if (it == NULL || it->it_op == IT_GETXATTR)
841 if (it->it_op == IT_GETATTR && dentry_may_statahead(parent, dentry)) {
842 rc = ll_revalidate_statahead(parent, &dentry, 0);
844 RETURN(dentry == save ? NULL : dentry);
847 if (it->it_op & IT_OPEN && it->it_flags & FMODE_WRITE &&
848 dentry->d_sb->s_flags & SB_RDONLY)
849 RETURN(ERR_PTR(-EROFS));
851 if (it->it_op & IT_CREAT)
852 opc = LUSTRE_OPC_CREATE;
854 opc = LUSTRE_OPC_LOOKUP;
856 /* Here we should be calling llcrypt_prepare_lookup(). But it installs a
857 * custom ->d_revalidate() method, so we lose ll_d_ops.
858 * To workaround this, call ll_setup_filename() and do the rest
859 * manually. Also make a copy of llcrypt_d_revalidate() (unfortunately
860 * not exported function) and call it from ll_revalidate_dentry(), to
861 * ensure we do not cache stale dentries after a key has been added.
863 rc = ll_setup_filename(parent, &dentry->d_name, 1, &fname, &fid);
864 if ((!rc || rc == -ENOENT) && fname.is_ciphertext_name) {
865 spin_lock(&dentry->d_lock);
866 dentry->d_flags |= DCACHE_ENCRYPTED_NAME;
867 spin_unlock(&dentry->d_lock);
874 op_data = ll_prep_md_op_data(NULL, parent, NULL, fname.disk_name.name,
875 fname.disk_name.len, 0, opc, NULL);
876 if (IS_ERR(op_data)) {
877 llcrypt_free_filename(&fname);
878 RETURN(ERR_CAST(op_data));
880 if (!fid_is_zero(&fid)) {
881 op_data->op_fid2 = fid;
882 op_data->op_bias = MDS_FID_OP;
883 if (it->it_op & IT_OPEN)
884 it->it_flags |= MDS_OPEN_BY_FID;
887 /* enforce umask if acl disabled or MDS doesn't support umask */
888 if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
889 it->it_create_mode &= ~current_umask();
891 if (it->it_op & IT_CREAT &&
892 ll_i2sbi(parent)->ll_flags & LL_SBI_FILE_SECCTX) {
893 rc = ll_dentry_init_security(dentry, it->it_create_mode,
895 &op_data->op_file_secctx_name,
896 &op_data->op_file_secctx,
897 &op_data->op_file_secctx_size);
899 GOTO(out, retval = ERR_PTR(rc));
901 *secctx = op_data->op_file_secctx;
902 if (secctxlen != NULL)
903 *secctxlen = op_data->op_file_secctx_size;
907 if (secctxlen != NULL)
910 if (it->it_op & IT_CREAT && encrypt) {
911 /* Volatile file name may look like:
912 * <parent>/LUSTRE_VOLATILE_HDR:<mdt_index>:<random>:fd=<fd>
913 * where fd is opened descriptor of reference file.
915 if (unlikely(filename_is_volatile(dentry->d_name.name,
916 dentry->d_name.len, NULL))) {
917 int ctx_size = LLCRYPT_ENC_CTX_SIZE;
918 struct lustre_sb_info *lsi;
919 struct file *ref_file;
920 struct inode *ref_inode;
921 char *p, *q, *fd_str;
925 p = strnstr(dentry->d_name.name, ":fd=",
927 if (!p || strlen(p + 4) == 0)
928 GOTO(out, retval = ERR_PTR(-EINVAL));
930 q = strchrnul(p + 4, ':');
931 fd_str = kstrndup(p + 4, q - p - 4, GFP_NOFS);
933 GOTO(out, retval = ERR_PTR(-ENOMEM));
934 rc = kstrtouint(fd_str, 10, &fd);
937 GOTO(inherit, rc = -EINVAL);
941 GOTO(inherit, rc = -EINVAL);
943 ref_inode = file_inode(ref_file);
946 GOTO(inherit, rc = -EINVAL);
949 lsi = s2lsi(ref_inode->i_sb);
952 OBD_ALLOC(ctx, ctx_size);
954 GOTO(out, retval = ERR_PTR(-ENOMEM));
956 #ifdef CONFIG_LL_ENCRYPTION
957 rc = lsi->lsi_cop->get_context(ref_inode,
963 OBD_FREE(ctx, ctx_size);
969 OBD_FREE(ctx, ctx_size);
973 op_data->op_file_encctx_size = rc;
974 if (rc == ctx_size) {
975 op_data->op_file_encctx = ctx;
977 OBD_ALLOC(op_data->op_file_encctx,
978 op_data->op_file_encctx_size);
979 if (!op_data->op_file_encctx) {
980 OBD_FREE(ctx, ctx_size);
981 GOTO(out, retval = ERR_PTR(-ENOMEM));
983 memcpy(op_data->op_file_encctx, ctx,
984 op_data->op_file_encctx_size);
985 OBD_FREE(ctx, ctx_size);
990 rc = llcrypt_inherit_context(parent, NULL, op_data,
993 GOTO(out, retval = ERR_PTR(rc));
996 *encctx = op_data->op_file_encctx;
997 if (encctxlen != NULL)
998 *encctxlen = op_data->op_file_encctx_size;
1002 if (encctxlen != NULL)
1006 /* ask for security context upon intent */
1007 if (it->it_op & (IT_LOOKUP | IT_GETATTR | IT_OPEN)) {
1008 /* get name of security xattr to request to server */
1009 rc = ll_listsecurity(parent, secctx_name,
1010 sizeof(secctx_name));
1012 CDEBUG(D_SEC, "cannot get security xattr name for "
1014 PFID(ll_inode2fid(parent)), rc);
1015 } else if (rc > 0) {
1016 op_data->op_file_secctx_name = secctx_name;
1017 op_data->op_file_secctx_name_size = rc;
1018 CDEBUG(D_SEC, "'%.*s' is security xattr for "DFID"\n",
1019 rc, secctx_name, PFID(ll_inode2fid(parent)));
1023 if (pca && pca->pca_dataset) {
1026 GOTO(out, retval = ERR_PTR(-ENOMEM));
1028 lum->lmm_magic = LOV_USER_MAGIC_V1;
1029 lum->lmm_pattern = LOV_PATTERN_F_RELEASED | LOV_PATTERN_RAID0;
1030 op_data->op_data = lum;
1031 op_data->op_data_size = sizeof(*lum);
1032 op_data->op_archive_id = pca->pca_dataset->pccd_rwid;
1033 it->it_flags |= MDS_OPEN_PCC;
1036 rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
1037 &ll_md_blocking_ast, 0);
1038 /* If the MDS allows the client to chgrp (CFS_SETGRP_PERM), but the
1039 * client does not know which suppgid should be sent to the MDS, or
1040 * some other(s) changed the target file's GID after this RPC sent
1041 * to the MDS with the suppgid as the original GID, then we should
1042 * try again with right suppgid. */
1043 if (rc == -EACCES && it->it_op & IT_OPEN &&
1044 it_disposition(it, DISP_OPEN_DENY)) {
1045 struct mdt_body *body;
1047 LASSERT(req != NULL);
1049 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1050 if (op_data->op_suppgids[0] == body->mbo_gid ||
1051 op_data->op_suppgids[1] == body->mbo_gid ||
1052 !in_group_p(make_kgid(&init_user_ns, body->mbo_gid)))
1053 GOTO(out, retval = ERR_PTR(-EACCES));
1055 fid_zero(&op_data->op_fid2);
1056 op_data->op_suppgids[1] = body->mbo_gid;
1057 ptlrpc_req_finished(req);
1059 ll_intent_release(it);
1060 rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
1061 &ll_md_blocking_ast, 0);
1065 GOTO(out, retval = ERR_PTR(rc));
1067 if (pca && pca->pca_dataset) {
1068 rc = pcc_inode_create(parent->i_sb, pca->pca_dataset,
1072 GOTO(out, retval = ERR_PTR(rc));
1075 /* dir layout may change */
1076 ll_unlock_md_op_lsm(op_data);
1077 rc = ll_lookup_it_finish(req, it, parent, &dentry,
1078 secctx != NULL ? *secctx : NULL,
1079 secctxlen != NULL ? *secctxlen : 0,
1080 encctx != NULL ? *encctx : NULL,
1081 encctxlen != NULL ? *encctxlen : 0,
1084 ll_intent_release(it);
1085 GOTO(out, retval = ERR_PTR(rc));
1088 if ((it->it_op & IT_OPEN) && dentry->d_inode &&
1089 !S_ISREG(dentry->d_inode->i_mode) &&
1090 !S_ISDIR(dentry->d_inode->i_mode)) {
1091 ll_release_openhandle(dentry, it);
1093 ll_lookup_finish_locks(it, dentry);
1095 GOTO(out, retval = (dentry == save) ? NULL : dentry);
1098 if (op_data != NULL && !IS_ERR(op_data)) {
1099 if (secctx != NULL && secctxlen != NULL) {
1100 /* caller needs sec ctx info, so reset it in op_data to
1101 * prevent it from being freed */
1102 op_data->op_file_secctx = NULL;
1103 op_data->op_file_secctx_size = 0;
1105 if (encctx != NULL && encctxlen != NULL &&
1106 it->it_op & IT_CREAT && encrypt) {
1107 /* caller needs enc ctx info, so reset it in op_data to
1108 * prevent it from being freed
1110 op_data->op_file_encctx = NULL;
1111 op_data->op_file_encctx_size = 0;
1113 llcrypt_free_filename(&fname);
1114 ll_finish_md_op_data(op_data);
1120 ptlrpc_req_finished(req);
1124 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
1127 struct lookup_intent *itp, it = { .it_op = IT_GETATTR };
1130 CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p), flags=%u\n",
1131 dentry, PFID(ll_inode2fid(parent)), parent, flags);
1134 * Optimize away (CREATE && !OPEN). Let .create handle the race.
1135 * but only if we have write permissions there, otherwise we need
1136 * to proceed with lookup. LU-4185
1138 if ((flags & LOOKUP_CREATE) && !(flags & LOOKUP_OPEN) &&
1139 (inode_permission(parent, MAY_WRITE | MAY_EXEC) == 0))
1142 if (flags & (LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE))
1146 de = ll_lookup_it(parent, dentry, itp, NULL, NULL, NULL, false,
1150 ll_intent_release(itp);
1155 #ifdef FMODE_CREATED /* added in Linux v4.18-rc1-20-g73a09dd */
1156 # define ll_is_opened(o, f) ((f)->f_mode & FMODE_OPENED)
1157 # define ll_finish_open(f, d, o) finish_open((f), (d), NULL)
1158 # define ll_last_arg
1159 # define ll_set_created(o, f) \
1161 (f)->f_mode |= FMODE_CREATED; \
1165 # define ll_is_opened(o, f) (*(o))
1166 # define ll_finish_open(f, d, o) finish_open((f), (d), NULL, (o))
1167 # define ll_last_arg , int *opened
1168 # define ll_set_created(o, f) \
1170 *(o) |= FILE_CREATED; \
1176 * For cached negative dentry and new dentry, handle lookup/create/open
1179 static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
1180 struct file *file, unsigned open_flags,
1181 umode_t mode ll_last_arg)
1183 struct lookup_intent *it;
1185 long long lookup_flags = LOOKUP_OPEN;
1186 void *secctx = NULL;
1187 __u32 secctxlen = 0;
1188 void *encctx = NULL;
1189 __u32 encctxlen = 0;
1190 struct ll_sb_info *sbi = NULL;
1191 struct pcc_create_attach pca = { NULL, NULL };
1192 bool encrypt = false;
1197 "VFS Op:name=%pd, dir="DFID"(%p), file %p, open_flags %x, mode %x opened %d\n",
1198 dentry, PFID(ll_inode2fid(dir)), dir, file, open_flags, mode,
1199 ll_is_opened(opened, file));
1201 /* Only negative dentries enter here */
1202 LASSERT(dentry->d_inode == NULL);
1204 if (!d_unhashed(dentry)) {
1205 /* A valid negative dentry that just passed revalidation,
1206 * there's little point to try and open it server-side,
1207 * even though there's a minuscule chance it might succeed.
1208 * Either way it's a valid race to just return -ENOENT here.
1210 if (!(open_flags & O_CREAT))
1213 /* Otherwise we just unhash it to be rehashed afresh via
1214 * lookup if necessary
1219 OBD_ALLOC(it, sizeof(*it));
1223 it->it_op = IT_OPEN;
1224 if (open_flags & O_CREAT) {
1225 it->it_op |= IT_CREAT;
1226 lookup_flags |= LOOKUP_CREATE;
1227 sbi = ll_i2sbi(dir);
1228 /* Volatile file is used for HSM restore, so do not use PCC */
1229 if (!filename_is_volatile(dentry->d_name.name,
1230 dentry->d_name.len, NULL)) {
1231 struct pcc_matcher item;
1232 struct pcc_dataset *dataset;
1234 item.pm_uid = from_kuid(&init_user_ns, current_uid());
1235 item.pm_gid = from_kgid(&init_user_ns, current_gid());
1236 item.pm_projid = ll_i2info(dir)->lli_projid;
1237 item.pm_name = &dentry->d_name;
1238 dataset = pcc_dataset_match_get(&sbi->ll_pcc_super,
1240 pca.pca_dataset = dataset;
1243 it->it_create_mode = (mode & S_IALLUGO) | S_IFREG;
1244 it->it_flags = (open_flags & ~O_ACCMODE) | OPEN_FMODE(open_flags);
1245 it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
1247 if (ll_sbi_has_encrypt(ll_i2sbi(dir)) && IS_ENCRYPTED(dir)) {
1248 /* in case of create, this is going to be a regular file because
1249 * we set S_IFREG bit on it->it_create_mode above
1251 rc = llcrypt_get_encryption_info(dir);
1253 GOTO(out_release, rc);
1254 if (open_flags & O_CREAT) {
1255 if (!llcrypt_has_encryption_key(dir))
1256 GOTO(out_release, rc = -ENOKEY);
1261 OBD_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE2, cfs_fail_val);
1263 /* We can only arrive at this path when we have no inode, so
1264 * we only need to request open lock if it was requested
1267 if (ll_i2sbi(dir)->ll_oc_thrsh_count == 1 &&
1268 exp_connect_flags2(ll_i2mdexp(dir)) &
1269 OBD_CONNECT2_ATOMIC_OPEN_LOCK)
1270 it->it_flags |= MDS_OPEN_LOCK;
1272 /* Dentry added to dcache tree in ll_lookup_it */
1273 de = ll_lookup_it(dir, dentry, it, &secctx, &secctxlen, &pca, encrypt,
1274 &encctx, &encctxlen);
1277 else if (de != NULL)
1280 CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1283 if (it_disposition(it, DISP_OPEN_CREATE)) {
1284 /* Dentry instantiated in ll_create_it. */
1285 rc = ll_create_it(dir, dentry, it, secctx, secctxlen,
1286 encrypt, encctx, encctxlen);
1287 ll_security_release_secctx(secctx, secctxlen);
1288 llcrypt_free_ctx(encctx, encctxlen);
1290 /* We dget in ll_splice_alias. */
1296 rc = pcc_inode_create_fini(dentry->d_inode, &pca);
1300 GOTO(out_release, rc);
1303 ll_set_created(opened, file);
1305 /* Open the file with O_CREAT, but the file already
1306 * existed on MDT. This may happend in the case that
1307 * the LOOKUP ibits lock is revoked and the
1308 * corresponding dentry cache is deleted.
1309 * i.e. In the current Lustre, the truncate operation
1310 * will revoke the LOOKUP ibits lock, and the file
1311 * dentry cache will be invalidated. The following open
1312 * with O_CREAT flag will call into ->atomic_open, the
1313 * file was wrongly though as newly created file and
1314 * try to auto cache the file. So after client knows it
1315 * is not a DISP_OPEN_CREATE, it should cleanup the
1316 * already created PCC copy.
1318 pcc_create_attach_cleanup(dir->i_sb, &pca);
1320 if (open_flags & O_CREAT && encrypt &&
1322 rc = ll_set_encflags(dentry->d_inode, encctx,
1324 llcrypt_free_ctx(encctx, encctxlen);
1326 GOTO(out_release, rc);
1330 /* check also if a foreign file is openable */
1331 if (dentry->d_inode && it_disposition(it, DISP_OPEN_OPEN) &&
1332 ll_foreign_is_openable(dentry, open_flags)) {
1334 if (S_ISFIFO(dentry->d_inode->i_mode)) {
1335 /* We cannot call open here as it might
1336 * deadlock. This case is unreachable in
1337 * practice because of OBD_CONNECT_NODEVOH. */
1338 rc = finish_no_open(file, de);
1340 file->private_data = it;
1341 rc = ll_finish_open(file, dentry, opened);
1342 /* We dget in ll_splice_alias. finish_open takes
1343 * care of dget for fd open.
1349 rc = finish_no_open(file, de);
1352 pcc_create_attach_cleanup(dir->i_sb, &pca);
1356 ll_intent_release(it);
1357 OBD_FREE(it, sizeof(*it));
1362 /* We depend on "mode" being set with the proper file type/umask by now */
1363 static struct inode *ll_create_node(struct inode *dir, struct lookup_intent *it)
1365 struct inode *inode = NULL;
1366 struct ptlrpc_request *request = NULL;
1367 struct ll_sb_info *sbi = ll_i2sbi(dir);
1371 LASSERT(it && it->it_disposition);
1373 LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
1374 request = it->it_request;
1375 it_clear_disposition(it, DISP_ENQ_CREATE_REF);
1376 rc = ll_prep_inode(&inode, &request->rq_pill, dir->i_sb, it);
1378 GOTO(out, inode = ERR_PTR(rc));
1380 /* Pause to allow for a race with concurrent access by fid */
1381 OBD_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_NODE_PAUSE, cfs_fail_val);
1383 /* We asked for a lock on the directory, but were granted a
1384 * lock on the inode. Since we finally have an inode pointer,
1385 * stuff it in the lock. */
1386 CDEBUG(D_DLMTRACE, "setting l_ast_data to inode "DFID"(%p)\n",
1387 PFID(ll_inode2fid(inode)), inode);
1388 ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
1391 ptlrpc_req_finished(request);
1396 * By the time this is called, we already have created the directory cache
1397 * entry for the new file, but it is so far negative - it has no inode.
1399 * We defer creating the OBD object(s) until open, to keep the intent and
1400 * non-intent code paths similar, and also because we do not have the MDS
1401 * inode number before calling ll_create_node() (which is needed for LOV),
1402 * so we would need to do yet another RPC to the MDS to store the LOV EA
1403 * data on the MDS. If needed, we would pass the PACKED lmm as data and
1404 * lmm_size in datalen (the MDS still has code which will handle that).
1406 * If the create succeeds, we fill in the inode information
1407 * with d_instantiate().
1409 static int ll_create_it(struct inode *dir, struct dentry *dentry,
1410 struct lookup_intent *it,
1411 void *secctx, __u32 secctxlen, bool encrypt,
1412 void *encctx, __u32 encctxlen)
1414 struct inode *inode;
1419 CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p), intent=%s\n",
1420 dentry, PFID(ll_inode2fid(dir)), dir, LL_IT2STR(it));
1422 rc = it_open_error(DISP_OPEN_CREATE, it);
1426 inode = ll_create_node(dir, it);
1428 RETURN(PTR_ERR(inode));
1430 if ((ll_i2sbi(inode)->ll_flags & LL_SBI_FILE_SECCTX) &&
1432 /* must be done before d_instantiate, because it calls
1433 * security_d_instantiate, which means a getxattr if security
1434 * context is not set yet */
1435 /* no need to protect selinux_inode_setsecurity() by
1436 * inode_lock. Taking it would lead to a client deadlock
1439 rc = security_inode_notifysecctx(inode, secctx, secctxlen);
1444 d_instantiate(dentry, inode);
1447 rc = ll_set_encflags(inode, encctx, encctxlen, true);
1452 if (!(ll_i2sbi(inode)->ll_flags & LL_SBI_FILE_SECCTX)) {
1453 rc = ll_inode_init_security(dentry, inode, dir);
1458 ll_set_lock_data(ll_i2sbi(dir)->ll_md_exp, inode, it, &bits);
1459 if (bits & MDS_INODELOCK_LOOKUP) {
1460 d_lustre_revalidate(dentry);
1461 ll_update_dir_depth(dir, inode);
1467 void ll_update_times(struct ptlrpc_request *request, struct inode *inode)
1469 struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
1473 if (body->mbo_valid & OBD_MD_FLMTIME &&
1474 body->mbo_mtime > inode->i_mtime.tv_sec) {
1476 "setting fid " DFID " mtime from %lld to %llu\n",
1477 PFID(ll_inode2fid(inode)),
1478 (s64)inode->i_mtime.tv_sec, body->mbo_mtime);
1479 inode->i_mtime.tv_sec = body->mbo_mtime;
1482 if (body->mbo_valid & OBD_MD_FLCTIME &&
1483 body->mbo_ctime > inode->i_ctime.tv_sec)
1484 inode->i_ctime.tv_sec = body->mbo_ctime;
1487 /* once default LMV (space balanced) is set on ROOT, it should take effect if
1488 * default LMV is not set on parent directory.
1490 static void ll_qos_mkdir_prep(struct md_op_data *op_data, struct inode *dir)
1492 struct inode *root = dir->i_sb->s_root->d_inode;
1493 struct ll_inode_info *rlli = ll_i2info(root);
1494 struct ll_inode_info *lli = ll_i2info(dir);
1495 struct lmv_stripe_md *lsm;
1497 op_data->op_dir_depth = lli->lli_depth;
1499 /* parent directory is striped */
1500 if (unlikely(lli->lli_lsm_md))
1503 /* default LMV set on parent directory */
1504 if (unlikely(lli->lli_default_lsm_md))
1507 /* parent is ROOT */
1508 if (unlikely(dir == root))
1511 /* default LMV not set on ROOT */
1512 if (!rlli->lli_default_lsm_md)
1515 down_read(&rlli->lli_lsm_sem);
1516 lsm = rlli->lli_default_lsm_md;
1520 /* not space balanced */
1521 if (lsm->lsm_md_master_mdt_index != LMV_OFFSET_DEFAULT)
1524 if (lsm->lsm_md_max_inherit != LMV_INHERIT_NONE &&
1525 (lsm->lsm_md_max_inherit == LMV_INHERIT_UNLIMITED ||
1526 lsm->lsm_md_max_inherit >= lli->lli_depth)) {
1527 op_data->op_flags |= MF_QOS_MKDIR;
1528 if (lsm->lsm_md_max_inherit_rr != LMV_INHERIT_RR_NONE &&
1529 (lsm->lsm_md_max_inherit_rr == LMV_INHERIT_RR_UNLIMITED ||
1530 lsm->lsm_md_max_inherit_rr >= lli->lli_depth))
1531 op_data->op_flags |= MF_RR_MKDIR;
1532 CDEBUG(D_INODE, DFID" requests qos mkdir %#x\n",
1533 PFID(&lli->lli_fid), op_data->op_flags);
1536 up_read(&rlli->lli_lsm_sem);
1539 static int ll_new_node(struct inode *dir, struct dentry *dchild,
1540 const char *tgt, umode_t mode, __u64 rdev, __u32 opc)
1542 struct qstr *name = &dchild->d_name;
1543 struct ptlrpc_request *request = NULL;
1544 struct md_op_data *op_data = NULL;
1545 struct inode *inode = NULL;
1546 struct ll_sb_info *sbi = ll_i2sbi(dir);
1547 struct llcrypt_str *disk_link = NULL;
1548 bool encrypt = false;
1552 if (unlikely(tgt != NULL)) {
1553 disk_link = (struct llcrypt_str *)rdev;
1560 op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1561 name->len, 0, opc, NULL);
1562 if (IS_ERR(op_data))
1563 GOTO(err_exit, err = PTR_ERR(op_data));
1566 ll_qos_mkdir_prep(op_data, dir);
1568 if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
1569 err = ll_dentry_init_security(dchild, mode, &dchild->d_name,
1570 &op_data->op_file_secctx_name,
1571 &op_data->op_file_secctx,
1572 &op_data->op_file_secctx_size);
1574 GOTO(err_exit, err);
1577 if (ll_sbi_has_encrypt(sbi) &&
1578 ((IS_ENCRYPTED(dir) &&
1579 (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))) ||
1580 (unlikely(llcrypt_dummy_context_enabled(dir)) && S_ISDIR(mode)))) {
1581 err = llcrypt_get_encryption_info(dir);
1583 GOTO(err_exit, err);
1584 if (!llcrypt_has_encryption_key(dir))
1585 GOTO(err_exit, err = -ENOKEY);
1590 err = llcrypt_inherit_context(dir, NULL, op_data, false);
1592 GOTO(err_exit, err);
1594 if (S_ISLNK(mode)) {
1595 /* llcrypt needs inode to encrypt target name, so create
1596 * a fake inode and associate encryption context got
1597 * from llcrypt_inherit_context.
1599 struct inode *fakeinode =
1600 dchild->d_sb->s_op->alloc_inode(dchild->d_sb);
1603 GOTO(err_exit, err = -ENOMEM);
1604 fakeinode->i_sb = dchild->d_sb;
1605 fakeinode->i_mode |= S_IFLNK;
1607 fakeinode->i_opflags |= IOP_XATTR;
1609 err = ll_set_encflags(fakeinode,
1610 op_data->op_file_encctx,
1611 op_data->op_file_encctx_size,
1614 err = __llcrypt_encrypt_symlink(fakeinode, tgt,
1618 ll_xattr_cache_destroy(fakeinode);
1619 llcrypt_put_encryption_info(fakeinode);
1620 dchild->d_sb->s_op->destroy_inode(fakeinode);
1622 GOTO(err_exit, err);
1626 err = md_create(sbi->ll_md_exp, op_data, tgt ? disk_link->name : NULL,
1627 tgt ? disk_link->len : 0, mode,
1628 from_kuid(&init_user_ns, current_fsuid()),
1629 from_kgid(&init_user_ns, current_fsgid()),
1630 current_cap(), rdev, &request);
1631 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 14, 58, 0)
1633 * server < 2.12.58 doesn't pack default LMV in intent_getattr reply,
1634 * fetch default LMV here.
1636 if (unlikely(err == -EREMOTE)) {
1637 struct ll_inode_info *lli = ll_i2info(dir);
1638 struct lmv_user_md *lum;
1642 ptlrpc_req_finished(request);
1645 err2 = ll_dir_getstripe(dir, (void **)&lum, &lumsize, &request,
1646 OBD_MD_DEFAULT_MEA);
1647 ll_finish_md_op_data(op_data);
1650 struct lustre_md md = { NULL };
1652 md.body = req_capsule_server_get(&request->rq_pill,
1655 GOTO(err_exit, err = -EPROTO);
1657 OBD_ALLOC_PTR(md.default_lmv);
1658 if (!md.default_lmv)
1659 GOTO(err_exit, err = -ENOMEM);
1661 md.default_lmv->lsm_md_magic = lum->lum_magic;
1662 md.default_lmv->lsm_md_stripe_count =
1663 lum->lum_stripe_count;
1664 md.default_lmv->lsm_md_master_mdt_index =
1665 lum->lum_stripe_offset;
1666 md.default_lmv->lsm_md_hash_type = lum->lum_hash_type;
1667 md.default_lmv->lsm_md_max_inherit =
1668 lum->lum_max_inherit;
1669 md.default_lmv->lsm_md_max_inherit_rr =
1670 lum->lum_max_inherit_rr;
1672 err = ll_update_inode(dir, &md);
1673 md_free_lustre_md(sbi->ll_md_exp, &md);
1675 GOTO(err_exit, err);
1676 } else if (err2 == -ENODATA && lli->lli_default_lsm_md) {
1678 * If there are no default stripe EA on the MDT, but the
1679 * client has default stripe, then it probably means
1680 * default stripe EA has just been deleted.
1682 down_write(&lli->lli_lsm_sem);
1683 if (lli->lli_default_lsm_md)
1684 OBD_FREE_PTR(lli->lli_default_lsm_md);
1685 lli->lli_default_lsm_md = NULL;
1686 up_write(&lli->lli_lsm_sem);
1688 GOTO(err_exit, err);
1691 ptlrpc_req_finished(request);
1698 GOTO(err_exit, err);
1700 ll_update_times(request, dir);
1702 CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_NEWNODE_PAUSE, cfs_fail_val);
1704 err = ll_prep_inode(&inode, &request->rq_pill, dchild->d_sb, NULL);
1706 GOTO(err_exit, err);
1708 if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
1709 /* must be done before d_instantiate, because it calls
1710 * security_d_instantiate, which means a getxattr if security
1711 * context is not set yet */
1712 /* no need to protect selinux_inode_setsecurity() by
1713 * inode_lock. Taking it would lead to a client deadlock
1716 err = security_inode_notifysecctx(inode,
1717 op_data->op_file_secctx,
1718 op_data->op_file_secctx_size);
1720 GOTO(err_exit, err);
1723 d_instantiate(dchild, inode);
1726 err = ll_set_encflags(inode, op_data->op_file_encctx,
1727 op_data->op_file_encctx_size, true);
1729 GOTO(err_exit, err);
1731 if (S_ISLNK(mode)) {
1732 struct ll_inode_info *lli = ll_i2info(inode);
1734 /* Cache the plaintext symlink target
1735 * for later use by get_link()
1737 OBD_ALLOC(lli->lli_symlink_name, strlen(tgt) + 1);
1738 /* do not return an error if we cannot
1739 * cache the symlink locally
1741 if (lli->lli_symlink_name)
1742 memcpy(lli->lli_symlink_name,
1743 tgt, strlen(tgt) + 1);
1747 if (!(sbi->ll_flags & LL_SBI_FILE_SECCTX)) {
1748 err = ll_inode_init_security(dchild, inode, dir);
1750 GOTO(err_exit, err);
1755 if (request != NULL)
1756 ptlrpc_req_finished(request);
1758 if (!IS_ERR_OR_NULL(op_data))
1759 ll_finish_md_op_data(op_data);
1764 static int ll_mknod(struct inode *dir, struct dentry *dchild, umode_t mode,
1767 ktime_t kstart = ktime_get();
1771 CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p) mode %o dev %x\n",
1772 dchild, PFID(ll_inode2fid(dir)), dir, mode, rdev);
1774 if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1775 mode &= ~current_umask();
1777 switch (mode & S_IFMT) {
1786 err = ll_new_node(dir, dchild, NULL, mode, old_encode_dev(rdev),
1797 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD,
1798 ktime_us_delta(ktime_get(), kstart));
1804 * Plain create. Intent create is handled in atomic_open.
1806 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1807 umode_t mode, bool want_excl)
1809 ktime_t kstart = ktime_get();
1812 CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1815 "VFS Op:name=%pd, dir="DFID"(%p), flags=%u, excl=%d\n",
1816 dentry, PFID(ll_inode2fid(dir)), dir, mode, want_excl);
1818 /* Using mknod(2) to create a regular file is designed to not recognize
1819 * volatile file name, so we use ll_mknod() here. */
1820 rc = ll_mknod(dir, dentry, mode, 0);
1822 CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, unhashed %d\n",
1823 dentry, d_unhashed(dentry));
1826 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE,
1827 ktime_us_delta(ktime_get(), kstart));
1832 static int ll_symlink(struct inode *dir, struct dentry *dchild,
1833 const char *oldpath)
1835 ktime_t kstart = ktime_get();
1836 int len = strlen(oldpath);
1837 struct llcrypt_str disk_link;
1841 CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p), target=%.*s\n",
1842 dchild, PFID(ll_inode2fid(dir)), dir, 3000, oldpath);
1844 err = llcrypt_prepare_symlink(dir, oldpath, len, dir->i_sb->s_blocksize,
1849 err = ll_new_node(dir, dchild, oldpath, S_IFLNK | S_IRWXUGO,
1850 (__u64)&disk_link, LUSTRE_OPC_SYMLINK);
1852 if (disk_link.name != (unsigned char *)oldpath)
1853 kfree(disk_link.name);
1856 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK,
1857 ktime_us_delta(ktime_get(), kstart));
1862 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1863 struct dentry *new_dentry)
1865 struct inode *src = old_dentry->d_inode;
1866 struct qstr *name = &new_dentry->d_name;
1867 struct ll_sb_info *sbi = ll_i2sbi(dir);
1868 struct ptlrpc_request *request = NULL;
1869 struct md_op_data *op_data;
1870 ktime_t kstart = ktime_get();
1875 "VFS Op: inode="DFID"(%p), dir="DFID"(%p), target=%pd\n",
1876 PFID(ll_inode2fid(src)), src,
1877 PFID(ll_inode2fid(dir)), dir, new_dentry);
1879 err = llcrypt_prepare_link(old_dentry, dir, new_dentry);
1883 op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
1884 0, LUSTRE_OPC_ANY, NULL);
1885 if (IS_ERR(op_data))
1886 RETURN(PTR_ERR(op_data));
1888 err = md_link(sbi->ll_md_exp, op_data, &request);
1889 ll_finish_md_op_data(op_data);
1893 ll_update_times(request, dir);
1894 ll_stats_ops_tally(sbi, LPROC_LL_LINK,
1895 ktime_us_delta(ktime_get(), kstart));
1898 ptlrpc_req_finished(request);
1902 static int ll_mkdir(struct inode *dir, struct dentry *dchild, umode_t mode)
1904 ktime_t kstart = ktime_get();
1908 CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p)\n",
1909 dchild, PFID(ll_inode2fid(dir)), dir);
1911 if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1912 mode &= ~current_umask();
1914 mode = (mode & (S_IRWXUGO|S_ISVTX)) | S_IFDIR;
1916 err = ll_new_node(dir, dchild, NULL, mode, 0, LUSTRE_OPC_MKDIR);
1918 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR,
1919 ktime_us_delta(ktime_get(), kstart));
1924 static int ll_rmdir(struct inode *dir, struct dentry *dchild)
1926 struct qstr *name = &dchild->d_name;
1927 struct ptlrpc_request *request = NULL;
1928 struct md_op_data *op_data;
1929 ktime_t kstart = ktime_get();
1934 CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p)\n",
1935 dchild, PFID(ll_inode2fid(dir)), dir);
1937 if (unlikely(d_mountpoint(dchild)))
1940 /* some foreign dir may not be allowed to be removed */
1941 if (!ll_foreign_is_removable(dchild, false))
1944 op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1945 S_IFDIR, LUSTRE_OPC_ANY, NULL);
1946 if (IS_ERR(op_data))
1947 RETURN(PTR_ERR(op_data));
1949 if (dchild->d_inode != NULL)
1950 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1952 if (fid_is_zero(&op_data->op_fid2))
1953 op_data->op_fid2 = op_data->op_fid3;
1954 rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1955 ll_finish_md_op_data(op_data);
1957 struct mdt_body *body;
1959 ll_update_times(request, dir);
1960 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR,
1961 ktime_us_delta(ktime_get(), kstart));
1964 * The server puts attributes in on the last unlink, use them
1965 * to update the link count so the inode can be freed
1968 body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1969 if (body->mbo_valid & OBD_MD_FLNLINK)
1970 set_nlink(dchild->d_inode, body->mbo_nlink);
1973 ptlrpc_req_finished(request);
1981 int ll_rmdir_entry(struct inode *dir, char *name, int namelen)
1983 struct ptlrpc_request *request = NULL;
1984 struct md_op_data *op_data;
1985 ktime_t kstart = ktime_get();
1989 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1990 namelen, name, PFID(ll_inode2fid(dir)), dir);
1992 op_data = ll_prep_md_op_data(NULL, dir, NULL, name, strlen(name),
1993 S_IFDIR, LUSTRE_OPC_ANY, NULL);
1994 if (IS_ERR(op_data))
1995 RETURN(PTR_ERR(op_data));
1996 op_data->op_cli_flags |= CLI_RM_ENTRY;
1997 rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1998 ll_finish_md_op_data(op_data);
2000 ll_update_times(request, dir);
2002 ptlrpc_req_finished(request);
2004 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR,
2005 ktime_us_delta(ktime_get(), kstart));
2009 static int ll_unlink(struct inode *dir, struct dentry *dchild)
2011 struct qstr *name = &dchild->d_name;
2012 struct ptlrpc_request *request = NULL;
2013 struct md_op_data *op_data;
2014 struct mdt_body *body;
2015 ktime_t kstart = ktime_get();
2020 CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p)\n",
2021 dchild, PFID(ll_inode2fid(dir)), dir);
2024 * XXX: unlink bind mountpoint maybe call to here,
2025 * just check it as vfs_unlink does.
2027 if (unlikely(d_mountpoint(dchild)))
2030 /* some foreign file/dir may not be allowed to be unlinked */
2031 if (!ll_foreign_is_removable(dchild, false))
2034 op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len, 0,
2035 LUSTRE_OPC_ANY, NULL);
2036 if (IS_ERR(op_data))
2037 RETURN(PTR_ERR(op_data));
2039 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
2040 /* notify lower layer if inode has dirty pages */
2041 if (S_ISREG(dchild->d_inode->i_mode) &&
2042 ll_i2info(dchild->d_inode)->lli_clob &&
2043 dirty_cnt(dchild->d_inode))
2044 op_data->op_cli_flags |= CLI_DIRTY_DATA;
2045 if (fid_is_zero(&op_data->op_fid2))
2046 op_data->op_fid2 = op_data->op_fid3;
2047 rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
2048 ll_finish_md_op_data(op_data);
2053 * The server puts attributes in on the last unlink, use them to update
2054 * the link count so the inode can be freed immediately.
2056 body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
2057 if (body->mbo_valid & OBD_MD_FLNLINK)
2058 set_nlink(dchild->d_inode, body->mbo_nlink);
2060 ll_update_times(request, dir);
2063 ptlrpc_req_finished(request);
2065 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK,
2066 ktime_us_delta(ktime_get(), kstart));
2070 static int ll_rename(struct inode *src, struct dentry *src_dchild,
2071 struct inode *tgt, struct dentry *tgt_dchild
2072 #ifdef HAVE_IOPS_RENAME_WITH_FLAGS
2073 , unsigned int flags
2077 struct ptlrpc_request *request = NULL;
2078 struct ll_sb_info *sbi = ll_i2sbi(src);
2079 struct md_op_data *op_data;
2080 ktime_t kstart = ktime_get();
2082 struct llcrypt_name foldname, fnewname;
2086 #ifdef HAVE_IOPS_RENAME_WITH_FLAGS
2092 "VFS Op:oldname=%pd, src_dir="DFID"(%p), newname=%pd, tgt_dir="DFID"(%p)\n",
2093 src_dchild, PFID(ll_inode2fid(src)), src,
2094 tgt_dchild, PFID(ll_inode2fid(tgt)), tgt);
2096 if (unlikely(d_mountpoint(src_dchild) || d_mountpoint(tgt_dchild)))
2099 #ifdef HAVE_IOPS_RENAME_WITH_FLAGS
2100 err = llcrypt_prepare_rename(src, src_dchild, tgt, tgt_dchild, flags);
2102 err = llcrypt_prepare_rename(src, src_dchild, tgt, tgt_dchild, 0);
2106 /* we prevent an encrypted file from being renamed
2107 * into an unencrypted dir
2109 if (IS_ENCRYPTED(src) && !IS_ENCRYPTED(tgt))
2112 if (src_dchild->d_inode)
2113 mode = src_dchild->d_inode->i_mode;
2115 if (tgt_dchild->d_inode)
2116 mode = tgt_dchild->d_inode->i_mode;
2118 op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, mode,
2119 LUSTRE_OPC_ANY, NULL);
2120 if (IS_ERR(op_data))
2121 RETURN(PTR_ERR(op_data));
2123 if (src_dchild->d_inode)
2124 op_data->op_fid3 = *ll_inode2fid(src_dchild->d_inode);
2126 if (tgt_dchild->d_inode)
2127 op_data->op_fid4 = *ll_inode2fid(tgt_dchild->d_inode);
2129 err = ll_setup_filename(src, &src_dchild->d_name, 1, &foldname, NULL);
2132 err = ll_setup_filename(tgt, &tgt_dchild->d_name, 1, &fnewname, NULL);
2134 llcrypt_free_filename(&foldname);
2137 err = md_rename(sbi->ll_md_exp, op_data,
2138 foldname.disk_name.name, foldname.disk_name.len,
2139 fnewname.disk_name.name, fnewname.disk_name.len,
2141 llcrypt_free_filename(&foldname);
2142 llcrypt_free_filename(&fnewname);
2143 ll_finish_md_op_data(op_data);
2145 ll_update_times(request, src);
2146 ll_update_times(request, tgt);
2149 ptlrpc_req_finished(request);
2152 d_move(src_dchild, tgt_dchild);
2153 ll_stats_ops_tally(sbi, LPROC_LL_RENAME,
2154 ktime_us_delta(ktime_get(), kstart));
2160 const struct inode_operations ll_dir_inode_operations = {
2162 .atomic_open = ll_atomic_open,
2163 .lookup = ll_lookup_nd,
2164 .create = ll_create_nd,
2165 /* We need all these non-raw things for NFSD, to not patch it. */
2166 .unlink = ll_unlink,
2169 .symlink = ll_symlink,
2171 .rename = ll_rename,
2172 .setattr = ll_setattr,
2173 .getattr = ll_getattr,
2174 .permission = ll_inode_permission,
2175 #ifdef HAVE_IOP_XATTR
2176 .setxattr = ll_setxattr,
2177 .getxattr = ll_getxattr,
2178 .removexattr = ll_removexattr,
2180 .listxattr = ll_listxattr,
2181 .get_acl = ll_get_acl,
2182 #ifdef HAVE_IOP_SET_ACL
2183 .set_acl = ll_set_acl,
2187 const struct inode_operations ll_special_inode_operations = {
2188 .setattr = ll_setattr,
2189 .getattr = ll_getattr,
2190 .permission = ll_inode_permission,
2191 #ifdef HAVE_IOP_XATTR
2192 .setxattr = ll_setxattr,
2193 .getxattr = ll_getxattr,
2194 .removexattr = ll_removexattr,
2196 .listxattr = ll_listxattr,
2197 .get_acl = ll_get_acl,
2198 #ifdef HAVE_IOP_SET_ACL
2199 .set_acl = ll_set_acl,