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, 2016, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
34 #include <linux/sched.h>
36 #include <linux/quotaops.h>
37 #include <linux/highmem.h>
38 #include <linux/pagemap.h>
39 #include <linux/security.h>
40 #include <linux/user_namespace.h>
41 #ifdef HAVE_UIDGID_HEADER
42 # include <linux/uidgid.h>
45 #define DEBUG_SUBSYSTEM S_LLITE
47 #include <obd_support.h>
48 #include <lustre_fid.h>
49 #include <lustre_dlm.h>
50 #include "llite_internal.h"
52 static int ll_create_it(struct inode *dir, struct dentry *dentry,
53 struct lookup_intent *it,
54 void *secctx, __u32 secctxlen);
56 /* called from iget5_locked->find_inode() under inode_lock spinlock */
57 static int ll_test_inode(struct inode *inode, void *opaque)
59 struct ll_inode_info *lli = ll_i2info(inode);
60 struct lustre_md *md = opaque;
62 if (unlikely(!(md->body->mbo_valid & OBD_MD_FLID))) {
63 CERROR("MDS body missing FID\n");
67 if (!lu_fid_eq(&lli->lli_fid, &md->body->mbo_fid1))
73 static int ll_set_inode(struct inode *inode, void *opaque)
75 struct ll_inode_info *lli = ll_i2info(inode);
76 struct mdt_body *body = ((struct lustre_md *)opaque)->body;
78 if (unlikely(!(body->mbo_valid & OBD_MD_FLID))) {
79 CERROR("MDS body missing FID\n");
83 lli->lli_fid = body->mbo_fid1;
84 if (unlikely(!(body->mbo_valid & OBD_MD_FLTYPE))) {
85 CERROR("Can not initialize inode "DFID" without object type: "
87 PFID(&lli->lli_fid), body->mbo_valid);
91 inode->i_mode = (inode->i_mode & ~S_IFMT) | (body->mbo_mode & S_IFMT);
92 if (unlikely(inode->i_mode == 0)) {
93 CERROR("Invalid inode "DFID" type\n", PFID(&lli->lli_fid));
104 * Get an inode by inode number(@hash), which is already instantiated by
105 * the intent lookup).
107 struct inode *ll_iget(struct super_block *sb, ino_t hash,
108 struct lustre_md *md)
116 inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
118 RETURN(ERR_PTR(-ENOMEM));
120 if (inode->i_state & I_NEW) {
121 rc = ll_read_inode2(inode, md);
122 if (rc == 0 && S_ISREG(inode->i_mode) &&
123 ll_i2info(inode)->lli_clob == NULL)
124 rc = cl_file_inode_init(inode, md);
127 /* Let's clear directory lsm here, otherwise
128 * make_bad_inode() will reset the inode mode
129 * to regular, then ll_clear_inode will not
130 * be able to clear lsm_md */
131 if (S_ISDIR(inode->i_mode))
132 ll_dir_clear_lsm_md(inode);
133 make_bad_inode(inode);
134 unlock_new_inode(inode);
138 inode_has_no_xattr(inode);
139 unlock_new_inode(inode);
141 } else if (is_bad_inode(inode)) {
143 inode = ERR_PTR(-ESTALE);
144 } else if (!(inode->i_state & (I_FREEING | I_CLEAR))) {
145 rc = ll_update_inode(inode, md);
146 CDEBUG(D_VFSTRACE, "got inode: "DFID"(%p): rc = %d\n",
147 PFID(&md->body->mbo_fid1), inode, rc);
149 if (S_ISDIR(inode->i_mode))
150 ll_dir_clear_lsm_md(inode);
159 static void ll_invalidate_negative_children(struct inode *dir)
161 struct dentry *dentry, *tmp_subdir;
162 DECLARE_LL_D_HLIST_NODE_PTR(p);
165 ll_d_hlist_for_each_entry(dentry, p, &dir->i_dentry) {
166 spin_lock(&dentry->d_lock);
167 if (!list_empty(&dentry->d_subdirs)) {
168 struct dentry *child;
170 list_for_each_entry_safe(child, tmp_subdir,
173 if (child->d_inode == NULL)
174 d_lustre_invalidate(child, 1);
177 spin_unlock(&dentry->d_lock);
179 ll_unlock_dcache(dir);
182 int ll_test_inode_by_fid(struct inode *inode, void *opaque)
184 return lu_fid_eq(&ll_i2info(inode)->lli_fid, opaque);
187 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
188 void *data, int flag)
190 struct lustre_handle lockh;
195 case LDLM_CB_BLOCKING:
196 ldlm_lock2handle(lock, &lockh);
197 rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
199 CDEBUG(D_INODE, "ldlm_cli_cancel: rc = %d\n", rc);
203 case LDLM_CB_CANCELING: {
204 struct inode *inode = ll_inode_from_resource_lock(lock);
205 __u64 bits = lock->l_policy_data.l_inodebits.bits;
207 /* Inode is set to lock->l_resource->lr_lvb_inode
208 * for mdc - bug 24555 */
209 LASSERT(lock->l_ast_data == NULL);
214 /* Invalidate all dentries associated with this inode */
215 LASSERT(ldlm_is_canceling(lock));
217 if (!fid_res_name_eq(ll_inode2fid(inode),
218 &lock->l_resource->lr_name)) {
219 LDLM_ERROR(lock, "data mismatch with object "DFID"(%p)",
220 PFID(ll_inode2fid(inode)), inode);
224 if (bits & MDS_INODELOCK_XATTR) {
225 if (S_ISDIR(inode->i_mode))
226 ll_i2info(inode)->lli_def_stripe_offset = -1;
227 ll_xattr_cache_destroy(inode);
228 bits &= ~MDS_INODELOCK_XATTR;
231 /* For OPEN locks we differentiate between lock modes
232 * LCK_CR, LCK_CW, LCK_PR - bug 22891 */
233 if (bits & MDS_INODELOCK_OPEN)
234 ll_have_md_lock(inode, &bits, lock->l_req_mode);
236 if (bits & MDS_INODELOCK_OPEN) {
239 switch (lock->l_req_mode) {
250 LDLM_ERROR(lock, "bad lock mode for OPEN lock");
254 ll_md_real_close(inode, fmode);
256 bits &= ~MDS_INODELOCK_OPEN;
259 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
260 MDS_INODELOCK_LAYOUT | MDS_INODELOCK_PERM))
261 ll_have_md_lock(inode, &bits, LCK_MINMODE);
263 if (bits & MDS_INODELOCK_LAYOUT) {
264 struct cl_object_conf conf = {
265 .coc_opc = OBJECT_CONF_INVALIDATE,
269 rc = ll_layout_conf(inode, &conf);
271 CDEBUG(D_INODE, "cannot invalidate layout of "
273 PFID(ll_inode2fid(inode)), rc);
276 if (bits & MDS_INODELOCK_UPDATE) {
277 struct ll_inode_info *lli = ll_i2info(inode);
278 lli->lli_update_atime = 1;
281 if ((bits & MDS_INODELOCK_UPDATE) && S_ISDIR(inode->i_mode)) {
282 struct ll_inode_info *lli = ll_i2info(inode);
284 CDEBUG(D_INODE, "invalidating inode "DFID" lli = %p, "
285 "pfid = "DFID"\n", PFID(ll_inode2fid(inode)),
286 lli, PFID(&lli->lli_pfid));
287 truncate_inode_pages(inode->i_mapping, 0);
289 if (unlikely(!fid_is_zero(&lli->lli_pfid))) {
290 struct inode *master_inode = NULL;
293 /* This is slave inode, since all of the child
294 * dentry is connected on the master inode, so
295 * we have to invalidate the negative children
297 CDEBUG(D_INODE, "Invalidate s"DFID" m"DFID"\n",
298 PFID(ll_inode2fid(inode)),
299 PFID(&lli->lli_pfid));
301 hash = cl_fid_build_ino(&lli->lli_pfid,
302 ll_need_32bit_api(ll_i2sbi(inode)));
304 /* Do not lookup the inode with ilookup5,
305 * otherwise it will cause dead lock,
307 * 1. Client1 send chmod req to the MDT0, then
308 * on MDT0, it enqueues master and all of its
309 * slaves lock, (mdt_attr_set() ->
310 * mdt_lock_slaves()), after gets master and
311 * stripe0 lock, it will send the enqueue req
312 * (for stripe1) to MDT1, then MDT1 finds the
313 * lock has been granted to client2. Then MDT1
314 * sends blocking ast to client2.
316 * 2. At the same time, client2 tries to unlink
317 * the striped dir (rm -rf striped_dir), and
318 * during lookup, it will hold the master inode
319 * of the striped directory, whose inode state
320 * is NEW, then tries to revalidate all of its
321 * slaves, (ll_prep_inode()->ll_iget()->
322 * ll_read_inode2()-> ll_update_inode().). And
323 * it will be blocked on the server side because
326 * 3. Then the client get the blocking_ast req,
327 * cancel the lock, but being blocked if using
328 * ->ilookup5()), because master inode state is
330 master_inode = ilookup5_nowait(inode->i_sb,
331 hash, ll_test_inode_by_fid,
332 (void *)&lli->lli_pfid);
334 ll_invalidate_negative_children(
339 ll_invalidate_negative_children(inode);
343 if ((bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM)) &&
344 inode->i_sb->s_root != NULL &&
345 inode != inode->i_sb->s_root->d_inode)
346 ll_invalidate_aliases(inode);
358 __u32 ll_i2suppgid(struct inode *i)
360 if (in_group_p(i->i_gid))
361 return (__u32)from_kgid(&init_user_ns, i->i_gid);
363 return (__u32) __kgid_val(INVALID_GID);
366 /* Pack the required supplementary groups into the supplied groups array.
367 * If we don't need to use the groups from the target inode(s) then we
368 * instead pack one or more groups from the user's supplementary group
369 * array in case it might be useful. Not needed if doing an MDS-side upcall. */
370 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
373 LASSERT(suppgids != NULL);
375 suppgids[0] = ll_i2suppgid(i1);
378 suppgids[1] = ll_i2suppgid(i2);
384 * try to reuse three types of dentry:
385 * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
386 * by concurrent .revalidate).
387 * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
388 * be cleared by others calling d_lustre_revalidate).
389 * 3. DISCONNECTED alias.
391 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
393 struct dentry *alias, *discon_alias, *invalid_alias;
394 DECLARE_LL_D_HLIST_NODE_PTR(p);
396 if (ll_d_hlist_empty(&inode->i_dentry))
399 discon_alias = invalid_alias = NULL;
401 ll_lock_dcache(inode);
402 ll_d_hlist_for_each_entry(alias, p, &inode->i_dentry) {
403 LASSERT(alias != dentry);
405 spin_lock(&alias->d_lock);
406 if ((alias->d_flags & DCACHE_DISCONNECTED) &&
407 S_ISDIR(inode->i_mode))
408 /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
409 discon_alias = alias;
410 else if (alias->d_parent == dentry->d_parent &&
411 alias->d_name.hash == dentry->d_name.hash &&
412 alias->d_name.len == dentry->d_name.len &&
413 memcmp(alias->d_name.name, dentry->d_name.name,
414 dentry->d_name.len) == 0)
415 invalid_alias = alias;
416 spin_unlock(&alias->d_lock);
421 alias = invalid_alias ?: discon_alias ?: NULL;
423 spin_lock(&alias->d_lock);
425 spin_unlock(&alias->d_lock);
427 ll_unlock_dcache(inode);
433 * Similar to d_splice_alias(), but lustre treats invalid alias
434 * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
436 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
442 new = ll_find_alias(inode, de);
452 "Reuse dentry %p inode %p refc %d flags %#x\n",
453 new, new->d_inode, ll_d_count(new), new->d_flags);
461 CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
462 de, de->d_inode, ll_d_count(de), de->d_flags);
466 static int ll_lookup_it_finish(struct ptlrpc_request *request,
467 struct lookup_intent *it,
468 struct inode *parent, struct dentry **de)
470 struct inode *inode = NULL;
473 struct dentry *alias;
476 /* NB 1 request reference will be taken away by ll_intent_lock()
478 CDEBUG(D_DENTRY, "it %p it_disposition %x\n", it,
480 if (!it_disposition(it, DISP_LOOKUP_NEG)) {
481 rc = ll_prep_inode(&inode, request, (*de)->d_sb, it);
485 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
487 /* We used to query real size from OSTs here, but actually
488 this is not needed. For stat() calls size would be updated
489 from subsequent do_revalidate()->ll_inode_revalidate_it() in
491 vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
492 Everybody else who needs correct file size would call
493 ll_glimpse_size or some equivalent themselves anyway.
494 Also see bug 7198. */
497 /* Only hash *de if it is unhashed (new dentry).
498 * Atoimc_open may passin hashed dentries for open.
500 alias = ll_splice_alias(inode, *de);
502 GOTO(out, rc = PTR_ERR(alias));
506 if (!it_disposition(it, DISP_LOOKUP_NEG)) {
507 /* we have lookup look - unhide dentry */
508 if (bits & MDS_INODELOCK_LOOKUP)
509 d_lustre_revalidate(*de);
510 } else if (!it_disposition(it, DISP_OPEN_CREATE)) {
511 /* If file created on server, don't depend on parent UPDATE
512 * lock to unhide it. It is left hidden and next lookup can
513 * find it in ll_splice_alias.
515 /* Check that parent has UPDATE lock. */
516 struct lookup_intent parent_it = {
518 .it_lock_handle = 0 };
519 struct lu_fid fid = ll_i2info(parent)->lli_fid;
521 /* If it is striped directory, get the real stripe parent */
522 if (unlikely(ll_i2info(parent)->lli_lsm_md != NULL)) {
523 rc = md_get_fid_from_lsm(ll_i2mdexp(parent),
524 ll_i2info(parent)->lli_lsm_md,
526 (*de)->d_name.len, &fid);
531 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it, &fid,
533 d_lustre_revalidate(*de);
534 ll_intent_release(&parent_it);
541 if (rc != 0 && it->it_op & IT_OPEN)
542 ll_open_cleanup((*de)->d_sb, request);
547 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
548 struct lookup_intent *it,
549 void **secctx, __u32 *secctxlen)
551 struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
552 struct dentry *save = dentry, *retval;
553 struct ptlrpc_request *req = NULL;
554 struct md_op_data *op_data = NULL;
559 if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
560 RETURN(ERR_PTR(-ENAMETOOLONG));
562 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
563 dentry->d_name.len, dentry->d_name.name,
564 PFID(ll_inode2fid(parent)), parent, LL_IT2STR(it));
566 if (d_mountpoint(dentry))
567 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
569 if (it == NULL || it->it_op == IT_GETXATTR)
572 if (it->it_op == IT_GETATTR && dentry_may_statahead(parent, dentry)) {
573 rc = ll_statahead(parent, &dentry, 0);
575 RETURN(dentry == save ? NULL : dentry);
578 if (it->it_op & IT_OPEN && it->it_flags & FMODE_WRITE &&
579 dentry->d_sb->s_flags & MS_RDONLY)
580 RETURN(ERR_PTR(-EROFS));
582 if (it->it_op & IT_CREAT)
583 opc = LUSTRE_OPC_CREATE;
585 opc = LUSTRE_OPC_ANY;
587 op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
588 dentry->d_name.len, 0, opc, NULL);
590 GOTO(out, retval = ERR_CAST(op_data));
592 /* enforce umask if acl disabled or MDS doesn't support umask */
593 if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
594 it->it_create_mode &= ~current_umask();
596 if (it->it_op & IT_CREAT &&
597 ll_i2sbi(parent)->ll_flags & LL_SBI_FILE_SECCTX) {
598 rc = ll_dentry_init_security(dentry, it->it_create_mode,
600 &op_data->op_file_secctx_name,
601 &op_data->op_file_secctx,
602 &op_data->op_file_secctx_size);
604 GOTO(out, retval = ERR_PTR(rc));
606 *secctx = op_data->op_file_secctx;
607 if (secctxlen != NULL)
608 *secctxlen = op_data->op_file_secctx_size;
611 rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
612 &ll_md_blocking_ast, 0);
613 /* If the MDS allows the client to chgrp (CFS_SETGRP_PERM), but the
614 * client does not know which suppgid should be sent to the MDS, or
615 * some other(s) changed the target file's GID after this RPC sent
616 * to the MDS with the suppgid as the original GID, then we should
617 * try again with right suppgid. */
618 if (rc == -EACCES && it->it_op & IT_OPEN &&
619 it_disposition(it, DISP_OPEN_DENY)) {
620 struct mdt_body *body;
622 LASSERT(req != NULL);
624 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
625 if (op_data->op_suppgids[0] == body->mbo_gid ||
626 op_data->op_suppgids[1] == body->mbo_gid ||
627 !in_group_p(make_kgid(&init_user_ns, body->mbo_gid)))
628 GOTO(out, retval = ERR_PTR(-EACCES));
630 fid_zero(&op_data->op_fid2);
631 op_data->op_suppgids[1] = body->mbo_gid;
632 ptlrpc_req_finished(req);
634 ll_intent_release(it);
635 rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
636 &ll_md_blocking_ast, 0);
640 GOTO(out, retval = ERR_PTR(rc));
642 rc = ll_lookup_it_finish(req, it, parent, &dentry);
644 ll_intent_release(it);
645 GOTO(out, retval = ERR_PTR(rc));
648 if ((it->it_op & IT_OPEN) && dentry->d_inode &&
649 !S_ISREG(dentry->d_inode->i_mode) &&
650 !S_ISDIR(dentry->d_inode->i_mode)) {
651 ll_release_openhandle(dentry, it);
653 ll_lookup_finish_locks(it, dentry);
655 GOTO(out, retval = (dentry == save) ? NULL : dentry);
658 if (op_data != NULL && !IS_ERR(op_data)) {
659 if (secctx != NULL && secctxlen != NULL) {
660 /* caller needs sec ctx info, so reset it in op_data to
661 * prevent it from being freed */
662 op_data->op_file_secctx = NULL;
663 op_data->op_file_secctx_size = 0;
665 ll_finish_md_op_data(op_data);
668 ptlrpc_req_finished(req);
672 #ifdef HAVE_IOP_ATOMIC_OPEN
673 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
676 struct lookup_intent *itp, it = { .it_op = IT_GETATTR };
679 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), flags=%u\n",
680 dentry->d_name.len, dentry->d_name.name,
681 PFID(ll_inode2fid(parent)), parent, flags);
684 * Optimize away (CREATE && !OPEN). Let .create handle the race.
685 * but only if we have write permissions there, otherwise we need
686 * to proceed with lookup. LU-4185
688 if ((flags & LOOKUP_CREATE) && !(flags & LOOKUP_OPEN) &&
689 (inode_permission(parent, MAY_WRITE | MAY_EXEC) == 0))
692 if (flags & (LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE))
696 de = ll_lookup_it(parent, dentry, itp, NULL, NULL);
699 ll_intent_release(itp);
705 * For cached negative dentry and new dentry, handle lookup/create/open
708 static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
709 struct file *file, unsigned open_flags,
710 umode_t mode, int *opened)
712 struct lookup_intent *it;
714 long long lookup_flags = LOOKUP_OPEN;
720 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), file %p,"
721 "open_flags %x, mode %x opened %d\n",
722 dentry->d_name.len, dentry->d_name.name,
723 PFID(ll_inode2fid(dir)), dir, file, open_flags, mode, *opened);
725 /* Only negative dentries enter here */
726 LASSERT(dentry->d_inode == NULL);
728 if (!d_unhashed(dentry)) {
729 /* A valid negative dentry that just passed revalidation,
730 * there's little point to try and open it server-side,
731 * even though there's a minuscule chance it might succeed.
732 * Either way it's a valid race to just return -ENOENT here.
734 if (!(open_flags & O_CREAT))
737 /* Otherwise we just unhash it to be rehashed afresh via
738 * lookup if necessary
743 OBD_ALLOC(it, sizeof(*it));
748 if (open_flags & O_CREAT) {
749 it->it_op |= IT_CREAT;
750 lookup_flags |= LOOKUP_CREATE;
752 it->it_create_mode = (mode & S_IALLUGO) | S_IFREG;
753 it->it_flags = (open_flags & ~O_ACCMODE) | OPEN_FMODE(open_flags);
754 it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
756 /* Dentry added to dcache tree in ll_lookup_it */
757 de = ll_lookup_it(dir, dentry, it, &secctx, &secctxlen);
763 CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
766 if (it_disposition(it, DISP_OPEN_CREATE)) {
767 /* Dentry instantiated in ll_create_it. */
768 rc = ll_create_it(dir, dentry, it, secctx, secctxlen);
769 security_release_secctx(secctx, secctxlen);
771 /* We dget in ll_splice_alias. */
777 *opened |= FILE_CREATED;
779 if (dentry->d_inode && it_disposition(it, DISP_OPEN_OPEN)) {
781 if (S_ISFIFO(dentry->d_inode->i_mode)) {
782 /* We cannot call open here as it might
783 * deadlock. This case is unreachable in
784 * practice because of OBD_CONNECT_NODEVOH. */
785 rc = finish_no_open(file, de);
787 file->private_data = it;
788 rc = finish_open(file, dentry, NULL, opened);
789 /* We dget in ll_splice_alias. finish_open takes
790 * care of dget for fd open.
796 rc = finish_no_open(file, de);
801 ll_intent_release(it);
802 OBD_FREE(it, sizeof(*it));
807 #else /* !HAVE_IOP_ATOMIC_OPEN */
808 static struct lookup_intent *
809 ll_convert_intent(struct open_intent *oit, int lookup_flags, bool is_readonly)
811 struct lookup_intent *it;
815 return ERR_PTR(-ENOMEM);
817 if (lookup_flags & LOOKUP_OPEN) {
819 /* Avoid file creation for ro bind mount point(is_readonly) */
820 if ((lookup_flags & LOOKUP_CREATE) && !is_readonly)
821 it->it_op |= IT_CREAT;
822 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
823 it->it_flags = ll_namei_to_lookup_intent_flag(oit->flags &
824 ~(is_readonly ? O_CREAT : 0));
825 it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
827 it->it_op = IT_GETATTR;
833 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
834 struct nameidata *nd)
839 if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
840 struct lookup_intent *it;
842 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
843 it = ll_d2d(dentry)->lld_it;
844 ll_d2d(dentry)->lld_it = NULL;
847 * Optimize away (CREATE && !OPEN). Let .create handle
848 * the race. But only if we have write permissions
849 * there, otherwise we need to proceed with lookup.
852 if ((nd->flags & LOOKUP_CREATE) &&
853 !(nd->flags & LOOKUP_OPEN) &&
854 (inode_permission(parent,
855 MAY_WRITE | MAY_EXEC) == 0))
858 it = ll_convert_intent(&nd->intent.open, nd->flags,
859 (nd->path.mnt->mnt_flags & MNT_READONLY) ||
860 (nd->path.mnt->mnt_sb->s_flags & MS_RDONLY));
862 RETURN((struct dentry *)it);
865 de = ll_lookup_it(parent, dentry, it, NULL, NULL);
868 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
869 if (dentry->d_inode &&
870 it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
871 if (S_ISFIFO(dentry->d_inode->i_mode)) {
872 /* We cannot call open here as it might
873 * deadlock. This case is unreachable in
874 * practice because of
875 * OBD_CONNECT_NODEVOH. */
879 nd->intent.open.file->private_data = it;
880 filp = lookup_instantiate_filp(nd,
886 de = (struct dentry *)filp;
889 } else if (it_disposition(it, DISP_OPEN_CREATE)) {
890 /* XXX This can only reliably work on assumption
891 * that there are NO hashed negative dentries.*/
892 ll_d2d(dentry)->lld_it = it;
893 it = NULL; /* Will be freed in ll_create_nd */
894 /* We absolutely depend on ll_create_nd to be
895 * called to not leak this intent and possible
896 * data attached to it */
901 ll_intent_release(it);
902 OBD_FREE(it, sizeof(*it));
905 de = ll_lookup_it(parent, dentry, NULL, NULL, NULL);
910 #endif /* HAVE_IOP_ATOMIC_OPEN */
912 /* We depend on "mode" being set with the proper file type/umask by now */
913 static struct inode *ll_create_node(struct inode *dir, struct lookup_intent *it)
915 struct inode *inode = NULL;
916 struct ptlrpc_request *request = NULL;
917 struct ll_sb_info *sbi = ll_i2sbi(dir);
921 LASSERT(it && it->it_disposition);
923 LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
924 request = it->it_request;
925 it_clear_disposition(it, DISP_ENQ_CREATE_REF);
926 rc = ll_prep_inode(&inode, request, dir->i_sb, it);
928 GOTO(out, inode = ERR_PTR(rc));
930 /* Pause to allow for a race with concurrent access by fid */
931 OBD_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_NODE_PAUSE, cfs_fail_val);
933 /* We asked for a lock on the directory, but were granted a
934 * lock on the inode. Since we finally have an inode pointer,
935 * stuff it in the lock. */
936 CDEBUG(D_DLMTRACE, "setting l_ast_data to inode "DFID"(%p)\n",
937 PFID(ll_inode2fid(inode)), inode);
938 ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
941 ptlrpc_req_finished(request);
946 * By the time this is called, we already have created the directory cache
947 * entry for the new file, but it is so far negative - it has no inode.
949 * We defer creating the OBD object(s) until open, to keep the intent and
950 * non-intent code paths similar, and also because we do not have the MDS
951 * inode number before calling ll_create_node() (which is needed for LOV),
952 * so we would need to do yet another RPC to the MDS to store the LOV EA
953 * data on the MDS. If needed, we would pass the PACKED lmm as data and
954 * lmm_size in datalen (the MDS still has code which will handle that).
956 * If the create succeeds, we fill in the inode information
957 * with d_instantiate().
959 static int ll_create_it(struct inode *dir, struct dentry *dentry,
960 struct lookup_intent *it,
961 void *secctx, __u32 secctxlen)
967 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
968 dentry->d_name.len, dentry->d_name.name,
969 PFID(ll_inode2fid(dir)), dir, LL_IT2STR(it));
971 rc = it_open_error(DISP_OPEN_CREATE, it);
975 inode = ll_create_node(dir, it);
977 RETURN(PTR_ERR(inode));
979 if ((ll_i2sbi(inode)->ll_flags & LL_SBI_FILE_SECCTX) &&
982 /* must be done before d_instantiate, because it calls
983 * security_d_instantiate, which means a getxattr if security
984 * context is not set yet */
985 rc = security_inode_notifysecctx(inode, secctx, secctxlen);
991 d_instantiate(dentry, inode);
993 if (!(ll_i2sbi(inode)->ll_flags & LL_SBI_FILE_SECCTX)) {
994 rc = ll_inode_init_security(dentry, inode, dir);
1002 void ll_update_times(struct ptlrpc_request *request, struct inode *inode)
1004 struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
1008 if (body->mbo_valid & OBD_MD_FLMTIME &&
1009 body->mbo_mtime > LTIME_S(inode->i_mtime)) {
1010 CDEBUG(D_INODE, "setting fid "DFID" mtime from %lu to %llu"
1011 "\n", PFID(ll_inode2fid(inode)),
1012 LTIME_S(inode->i_mtime), body->mbo_mtime);
1013 LTIME_S(inode->i_mtime) = body->mbo_mtime;
1016 if (body->mbo_valid & OBD_MD_FLCTIME &&
1017 body->mbo_ctime > LTIME_S(inode->i_ctime))
1018 LTIME_S(inode->i_ctime) = body->mbo_ctime;
1021 static int ll_new_node(struct inode *dir, struct dentry *dchild,
1022 const char *tgt, umode_t mode, int rdev, __u32 opc)
1024 struct qstr *name = &dchild->d_name;
1025 struct ptlrpc_request *request = NULL;
1026 struct md_op_data *op_data;
1027 struct inode *inode = NULL;
1028 struct ll_sb_info *sbi = ll_i2sbi(dir);
1033 if (unlikely(tgt != NULL))
1034 tgt_len = strlen(tgt) + 1;
1037 op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1038 name->len, 0, opc, NULL);
1039 if (IS_ERR(op_data))
1040 GOTO(err_exit, err = PTR_ERR(op_data));
1042 if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
1043 err = ll_dentry_init_security(dchild, mode, &dchild->d_name,
1044 &op_data->op_file_secctx_name,
1045 &op_data->op_file_secctx,
1046 &op_data->op_file_secctx_size);
1048 GOTO(err_exit, err);
1051 err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
1052 from_kuid(&init_user_ns, current_fsuid()),
1053 from_kgid(&init_user_ns, current_fsgid()),
1054 cfs_curproc_cap_pack(), rdev, &request);
1055 if (err < 0 && err != -EREMOTE)
1056 GOTO(err_exit, err);
1058 /* If the client doesn't know where to create a subdirectory (or
1059 * in case of a race that sends the RPC to the wrong MDS), the
1060 * MDS will return -EREMOTE and the client will fetch the layout
1061 * of the directory, then create the directory on the right MDT. */
1062 if (unlikely(err == -EREMOTE)) {
1063 struct ll_inode_info *lli = ll_i2info(dir);
1064 struct lmv_user_md *lum;
1068 ptlrpc_req_finished(request);
1071 err2 = ll_dir_getstripe(dir, (void **)&lum, &lumsize, &request,
1072 OBD_MD_DEFAULT_MEA);
1074 /* Update stripe_offset and retry */
1075 lli->lli_def_stripe_offset = lum->lum_stripe_offset;
1076 } else if (err2 == -ENODATA &&
1077 lli->lli_def_stripe_offset != -1) {
1078 /* If there are no default stripe EA on the MDT, but the
1079 * client has default stripe, then it probably means
1080 * default stripe EA has just been deleted. */
1081 lli->lli_def_stripe_offset = -1;
1083 GOTO(err_exit, err);
1086 ptlrpc_req_finished(request);
1088 ll_finish_md_op_data(op_data);
1092 ll_update_times(request, dir);
1094 CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_NEWNODE_PAUSE, cfs_fail_val);
1096 err = ll_prep_inode(&inode, request, dchild->d_sb, NULL);
1098 GOTO(err_exit, err);
1100 if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
1102 /* must be done before d_instantiate, because it calls
1103 * security_d_instantiate, which means a getxattr if security
1104 * context is not set yet */
1105 err = security_inode_notifysecctx(inode,
1106 op_data->op_file_secctx,
1107 op_data->op_file_secctx_size);
1108 inode_unlock(inode);
1110 GOTO(err_exit, err);
1113 d_instantiate(dchild, inode);
1115 if (!(sbi->ll_flags & LL_SBI_FILE_SECCTX)) {
1116 err = ll_inode_init_security(dchild, inode, dir);
1118 GOTO(err_exit, err);
1123 if (request != NULL)
1124 ptlrpc_req_finished(request);
1126 if (!IS_ERR_OR_NULL(op_data))
1127 ll_finish_md_op_data(op_data);
1132 static int ll_mknod(struct inode *dir, struct dentry *dchild, ll_umode_t mode,
1135 struct qstr *name = &dchild->d_name;
1139 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p) mode %o dev %x\n",
1140 name->len, name->name, PFID(ll_inode2fid(dir)), dir,
1143 if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1144 mode &= ~current_umask();
1146 switch (mode & S_IFMT) {
1148 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
1154 err = ll_new_node(dir, dchild, NULL, mode, old_encode_dev(rdev),
1165 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD, 1);
1170 #ifdef HAVE_IOP_ATOMIC_OPEN
1172 * Plain create. Intent create is handled in atomic_open.
1174 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1175 umode_t mode, bool want_excl)
1179 CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1181 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), "
1182 "flags=%u, excl=%d\n", dentry->d_name.len,
1183 dentry->d_name.name, PFID(ll_inode2fid(dir)),
1184 dir, mode, want_excl);
1186 /* Using mknod(2) to create a regular file is designed to not recognize
1187 * volatile file name, so we use ll_mknod() here. */
1188 rc = ll_mknod(dir, dentry, mode, 0);
1190 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1192 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, unhashed %d\n",
1193 dentry->d_name.len, dentry->d_name.name, d_unhashed(dentry));
1197 #else /* !HAVE_IOP_ATOMIC_OPEN */
1198 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1199 ll_umode_t mode, struct nameidata *nd)
1201 struct ll_dentry_data *lld = ll_d2d(dentry);
1202 struct lookup_intent *it = NULL;
1205 CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1211 /* LU-8559: use LUSTRE_OPC_CREATE for non atomic open case
1212 * so that volatile file name is recoginized.
1213 * Mknod(2), however, is designed to not recognize volatile
1214 * file name to avoid inode leak under orphan directory until
1216 return ll_new_node(dir, dentry, NULL, mode, 0,
1222 /* Was there an error? Propagate it! */
1223 if (it->it_status) {
1228 rc = ll_create_it(dir, dentry, it, NULL, 0);
1229 if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
1232 nd->intent.open.file->private_data = it;
1233 filp = lookup_instantiate_filp(nd, dentry, NULL);
1239 ll_intent_release(it);
1240 OBD_FREE(it, sizeof(*it));
1243 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1247 #endif /* HAVE_IOP_ATOMIC_OPEN */
1249 static int ll_symlink(struct inode *dir, struct dentry *dchild,
1250 const char *oldpath)
1252 struct qstr *name = &dchild->d_name;
1256 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), target=%.*s\n",
1257 name->len, name->name, PFID(ll_inode2fid(dir)),
1258 dir, 3000, oldpath);
1260 err = ll_new_node(dir, dchild, oldpath, S_IFLNK | S_IRWXUGO, 0,
1261 LUSTRE_OPC_SYMLINK);
1264 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK, 1);
1269 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1270 struct dentry *new_dentry)
1272 struct inode *src = old_dentry->d_inode;
1273 struct qstr *name = &new_dentry->d_name;
1274 struct ll_sb_info *sbi = ll_i2sbi(dir);
1275 struct ptlrpc_request *request = NULL;
1276 struct md_op_data *op_data;
1280 CDEBUG(D_VFSTRACE, "VFS Op: inode="DFID"(%p), dir="DFID"(%p), "
1281 "target=%.*s\n", PFID(ll_inode2fid(src)), src,
1282 PFID(ll_inode2fid(dir)), dir, name->len, name->name);
1284 op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
1285 0, LUSTRE_OPC_ANY, NULL);
1286 if (IS_ERR(op_data))
1287 RETURN(PTR_ERR(op_data));
1289 err = md_link(sbi->ll_md_exp, op_data, &request);
1290 ll_finish_md_op_data(op_data);
1294 ll_update_times(request, dir);
1295 ll_stats_ops_tally(sbi, LPROC_LL_LINK, 1);
1298 ptlrpc_req_finished(request);
1302 static int ll_mkdir(struct inode *dir, struct dentry *dchild, ll_umode_t mode)
1304 struct qstr *name = &dchild->d_name;
1308 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1309 name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1311 if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1312 mode &= ~current_umask();
1314 mode = (mode & (S_IRWXUGO|S_ISVTX)) | S_IFDIR;
1316 err = ll_new_node(dir, dchild, NULL, mode, 0, LUSTRE_OPC_MKDIR);
1318 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR, 1);
1323 static int ll_rmdir(struct inode *dir, struct dentry *dchild)
1325 struct qstr *name = &dchild->d_name;
1326 struct ptlrpc_request *request = NULL;
1327 struct md_op_data *op_data;
1331 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1332 name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1334 if (unlikely(d_mountpoint(dchild)))
1337 op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1338 S_IFDIR, LUSTRE_OPC_ANY, NULL);
1339 if (IS_ERR(op_data))
1340 RETURN(PTR_ERR(op_data));
1342 if (dchild->d_inode != NULL)
1343 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1345 op_data->op_fid2 = op_data->op_fid3;
1346 rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1347 ll_finish_md_op_data(op_data);
1349 ll_update_times(request, dir);
1350 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1353 ptlrpc_req_finished(request);
1360 int ll_rmdir_entry(struct inode *dir, char *name, int namelen)
1362 struct ptlrpc_request *request = NULL;
1363 struct md_op_data *op_data;
1367 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1368 namelen, name, PFID(ll_inode2fid(dir)), dir);
1370 op_data = ll_prep_md_op_data(NULL, dir, NULL, name, strlen(name),
1371 S_IFDIR, LUSTRE_OPC_ANY, NULL);
1372 if (IS_ERR(op_data))
1373 RETURN(PTR_ERR(op_data));
1374 op_data->op_cli_flags |= CLI_RM_ENTRY;
1375 rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1376 ll_finish_md_op_data(op_data);
1378 ll_update_times(request, dir);
1379 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1382 ptlrpc_req_finished(request);
1386 static int ll_unlink(struct inode *dir, struct dentry *dchild)
1388 struct qstr *name = &dchild->d_name;
1389 struct ptlrpc_request *request = NULL;
1390 struct md_op_data *op_data;
1393 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1394 name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1397 * XXX: unlink bind mountpoint maybe call to here,
1398 * just check it as vfs_unlink does.
1400 if (unlikely(d_mountpoint(dchild)))
1403 op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len, 0,
1404 LUSTRE_OPC_ANY, NULL);
1405 if (IS_ERR(op_data))
1406 RETURN(PTR_ERR(op_data));
1408 if (dchild->d_inode != NULL)
1409 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1411 op_data->op_fid2 = op_data->op_fid3;
1412 rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1413 ll_finish_md_op_data(op_data);
1417 ll_update_times(request, dir);
1418 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK, 1);
1421 ptlrpc_req_finished(request);
1425 static int ll_rename(struct inode *src, struct dentry *src_dchild,
1426 struct inode *tgt, struct dentry *tgt_dchild
1427 #ifdef HAVE_IOPS_RENAME_WITH_FLAGS
1428 , unsigned int flags
1432 struct qstr *src_name = &src_dchild->d_name;
1433 struct qstr *tgt_name = &tgt_dchild->d_name;
1434 struct ptlrpc_request *request = NULL;
1435 struct ll_sb_info *sbi = ll_i2sbi(src);
1436 struct md_op_data *op_data;
1440 #ifdef HAVE_IOPS_RENAME_WITH_FLAGS
1445 CDEBUG(D_VFSTRACE, "VFS Op:oldname=%.*s, src_dir="DFID
1446 "(%p), newname=%.*s, tgt_dir="DFID"(%p)\n",
1447 src_name->len, src_name->name,
1448 PFID(ll_inode2fid(src)), src, tgt_name->len,
1449 tgt_name->name, PFID(ll_inode2fid(tgt)), tgt);
1451 if (unlikely(d_mountpoint(src_dchild) || d_mountpoint(tgt_dchild)))
1454 op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1455 LUSTRE_OPC_ANY, NULL);
1456 if (IS_ERR(op_data))
1457 RETURN(PTR_ERR(op_data));
1459 if (src_dchild->d_inode != NULL)
1460 op_data->op_fid3 = *ll_inode2fid(src_dchild->d_inode);
1462 if (tgt_dchild->d_inode != NULL)
1463 op_data->op_fid4 = *ll_inode2fid(tgt_dchild->d_inode);
1465 err = md_rename(sbi->ll_md_exp, op_data,
1466 src_name->name, src_name->len,
1467 tgt_name->name, tgt_name->len, &request);
1468 ll_finish_md_op_data(op_data);
1470 ll_update_times(request, src);
1471 ll_update_times(request, tgt);
1472 ll_stats_ops_tally(sbi, LPROC_LL_RENAME, 1);
1475 ptlrpc_req_finished(request);
1478 d_move(src_dchild, tgt_dchild);
1483 const struct inode_operations ll_dir_inode_operations = {
1485 #ifdef HAVE_IOP_ATOMIC_OPEN
1486 .atomic_open = ll_atomic_open,
1488 .lookup = ll_lookup_nd,
1489 .create = ll_create_nd,
1490 /* We need all these non-raw things for NFSD, to not patch it. */
1491 .unlink = ll_unlink,
1494 .symlink = ll_symlink,
1496 .rename = ll_rename,
1497 .setattr = ll_setattr,
1498 .getattr = ll_getattr,
1499 .permission = ll_inode_permission,
1500 #ifdef HAVE_IOP_XATTR
1501 .setxattr = ll_setxattr,
1502 .getxattr = ll_getxattr,
1503 .removexattr = ll_removexattr,
1505 .listxattr = ll_listxattr,
1506 #ifdef HAVE_IOP_GET_ACL
1507 .get_acl = ll_get_acl,
1509 #ifdef HAVE_IOP_SET_ACL
1510 .set_acl = ll_set_acl,
1514 const struct inode_operations ll_special_inode_operations = {
1515 .setattr = ll_setattr,
1516 .getattr = ll_getattr,
1517 .permission = ll_inode_permission,
1518 #ifdef HAVE_IOP_XATTR
1519 .setxattr = ll_setxattr,
1520 .getxattr = ll_getxattr,
1521 .removexattr = ll_removexattr,
1523 .listxattr = ll_listxattr,
1524 #ifdef HAVE_IOP_GET_ACL
1525 .get_acl = ll_get_acl,
1527 #ifdef HAVE_IOP_SET_ACL
1528 .set_acl = ll_set_acl,