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.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2015, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 #include <linux/sched.h>
40 #include <linux/quotaops.h>
41 #include <linux/highmem.h>
42 #include <linux/pagemap.h>
43 #include <linux/security.h>
44 #include <linux/user_namespace.h>
45 #ifdef HAVE_UIDGID_HEADER
46 # include <linux/uidgid.h>
49 #define DEBUG_SUBSYSTEM S_LLITE
51 #include <obd_support.h>
52 #include <lustre_fid.h>
53 #include <lustre_dlm.h>
54 #include <lustre_ver.h>
55 #include "llite_internal.h"
57 static int ll_create_it(struct inode *dir, struct dentry *dentry,
58 struct lookup_intent *it);
60 /* called from iget5_locked->find_inode() under inode_lock spinlock */
61 static int ll_test_inode(struct inode *inode, void *opaque)
63 struct ll_inode_info *lli = ll_i2info(inode);
64 struct lustre_md *md = opaque;
66 if (unlikely(!(md->body->mbo_valid & OBD_MD_FLID))) {
67 CERROR("MDS body missing FID\n");
71 if (!lu_fid_eq(&lli->lli_fid, &md->body->mbo_fid1))
77 static int ll_set_inode(struct inode *inode, void *opaque)
79 struct ll_inode_info *lli = ll_i2info(inode);
80 struct mdt_body *body = ((struct lustre_md *)opaque)->body;
82 if (unlikely(!(body->mbo_valid & OBD_MD_FLID))) {
83 CERROR("MDS body missing FID\n");
87 lli->lli_fid = body->mbo_fid1;
88 if (unlikely(!(body->mbo_valid & OBD_MD_FLTYPE))) {
89 CERROR("Can not initialize inode "DFID" without object type: "
91 PFID(&lli->lli_fid), body->mbo_valid);
95 inode->i_mode = (inode->i_mode & ~S_IFMT) | (body->mbo_mode & S_IFMT);
96 if (unlikely(inode->i_mode == 0)) {
97 CERROR("Invalid inode "DFID" type\n", PFID(&lli->lli_fid));
108 * Get an inode by inode number(@hash), which is already instantiated by
109 * the intent lookup).
111 struct inode *ll_iget(struct super_block *sb, ino_t hash,
112 struct lustre_md *md)
120 inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
122 RETURN(ERR_PTR(-ENOMEM));
124 if (inode->i_state & I_NEW) {
125 rc = ll_read_inode2(inode, md);
126 if (rc == 0 && S_ISREG(inode->i_mode) &&
127 ll_i2info(inode)->lli_clob == NULL)
128 rc = cl_file_inode_init(inode, md);
131 /* Let's clear directory lsm here, otherwise
132 * make_bad_inode() will reset the inode mode
133 * to regular, then ll_clear_inode will not
134 * be able to clear lsm_md */
135 if (S_ISDIR(inode->i_mode))
136 ll_dir_clear_lsm_md(inode);
137 make_bad_inode(inode);
138 unlock_new_inode(inode);
142 unlock_new_inode(inode);
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);
279 spin_lock(&lli->lli_lock);
280 LTIME_S(inode->i_mtime) = 0;
281 LTIME_S(inode->i_atime) = 0;
282 LTIME_S(inode->i_ctime) = 0;
283 spin_unlock(&lli->lli_lock);
286 if ((bits & MDS_INODELOCK_UPDATE) && S_ISDIR(inode->i_mode)) {
287 struct ll_inode_info *lli = ll_i2info(inode);
289 CDEBUG(D_INODE, "invalidating inode "DFID" lli = %p, "
290 "pfid = "DFID"\n", PFID(ll_inode2fid(inode)),
291 lli, PFID(&lli->lli_pfid));
292 truncate_inode_pages(inode->i_mapping, 0);
294 if (unlikely(!fid_is_zero(&lli->lli_pfid))) {
295 struct inode *master_inode = NULL;
298 /* This is slave inode, since all of the child
299 * dentry is connected on the master inode, so
300 * we have to invalidate the negative children
302 CDEBUG(D_INODE, "Invalidate s"DFID" m"DFID"\n",
303 PFID(ll_inode2fid(inode)),
304 PFID(&lli->lli_pfid));
306 hash = cl_fid_build_ino(&lli->lli_pfid,
307 ll_need_32bit_api(ll_i2sbi(inode)));
309 /* Do not lookup the inode with ilookup5,
310 * otherwise it will cause dead lock,
312 * 1. Client1 send chmod req to the MDT0, then
313 * on MDT0, it enqueues master and all of its
314 * slaves lock, (mdt_attr_set() ->
315 * mdt_lock_slaves()), after gets master and
316 * stripe0 lock, it will send the enqueue req
317 * (for stripe1) to MDT1, then MDT1 finds the
318 * lock has been granted to client2. Then MDT1
319 * sends blocking ast to client2.
321 * 2. At the same time, client2 tries to unlink
322 * the striped dir (rm -rf striped_dir), and
323 * during lookup, it will hold the master inode
324 * of the striped directory, whose inode state
325 * is NEW, then tries to revalidate all of its
326 * slaves, (ll_prep_inode()->ll_iget()->
327 * ll_read_inode2()-> ll_update_inode().). And
328 * it will be blocked on the server side because
331 * 3. Then the client get the blocking_ast req,
332 * cancel the lock, but being blocked if using
333 * ->ilookup5()), because master inode state is
335 master_inode = ilookup5_nowait(inode->i_sb,
336 hash, ll_test_inode_by_fid,
337 (void *)&lli->lli_pfid);
338 if (master_inode != NULL &&
339 !IS_ERR(master_inode)) {
340 ll_invalidate_negative_children(
345 ll_invalidate_negative_children(inode);
349 if ((bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM)) &&
350 inode->i_sb->s_root != NULL &&
351 inode != inode->i_sb->s_root->d_inode)
352 ll_invalidate_aliases(inode);
364 __u32 ll_i2suppgid(struct inode *i)
366 if (in_group_p(i->i_gid))
367 return (__u32)from_kgid(&init_user_ns, i->i_gid);
369 return (__u32) __kgid_val(INVALID_GID);
372 /* Pack the required supplementary groups into the supplied groups array.
373 * If we don't need to use the groups from the target inode(s) then we
374 * instead pack one or more groups from the user's supplementary group
375 * array in case it might be useful. Not needed if doing an MDS-side upcall. */
376 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
379 LASSERT(suppgids != NULL);
381 suppgids[0] = ll_i2suppgid(i1);
384 suppgids[1] = ll_i2suppgid(i2);
390 * try to reuse three types of dentry:
391 * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
392 * by concurrent .revalidate).
393 * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
394 * be cleared by others calling d_lustre_revalidate).
395 * 3. DISCONNECTED alias.
397 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
399 struct dentry *alias, *discon_alias, *invalid_alias;
400 DECLARE_LL_D_HLIST_NODE_PTR(p);
402 if (ll_d_hlist_empty(&inode->i_dentry))
405 discon_alias = invalid_alias = NULL;
407 ll_lock_dcache(inode);
408 ll_d_hlist_for_each_entry(alias, p, &inode->i_dentry) {
409 LASSERT(alias != dentry);
411 spin_lock(&alias->d_lock);
412 if ((alias->d_flags & DCACHE_DISCONNECTED) &&
413 S_ISDIR(inode->i_mode))
414 /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
415 discon_alias = alias;
416 else if (alias->d_parent == dentry->d_parent &&
417 alias->d_name.hash == dentry->d_name.hash &&
418 alias->d_name.len == dentry->d_name.len &&
419 memcmp(alias->d_name.name, dentry->d_name.name,
420 dentry->d_name.len) == 0)
421 invalid_alias = alias;
422 spin_unlock(&alias->d_lock);
427 alias = invalid_alias ?: discon_alias ?: NULL;
429 spin_lock(&alias->d_lock);
431 spin_unlock(&alias->d_lock);
433 ll_unlock_dcache(inode);
439 * Similar to d_splice_alias(), but lustre treats invalid alias
440 * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
442 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
448 new = ll_find_alias(inode, de);
458 "Reuse dentry %p inode %p refc %d flags %#x\n",
459 new, new->d_inode, ll_d_count(new), new->d_flags);
467 CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
468 de, de->d_inode, ll_d_count(de), de->d_flags);
472 static int ll_lookup_it_finish(struct ptlrpc_request *request,
473 struct lookup_intent *it,
474 struct inode *parent, struct dentry **de)
476 struct inode *inode = NULL;
479 struct dentry *alias;
482 /* NB 1 request reference will be taken away by ll_intent_lock()
484 CDEBUG(D_DENTRY, "it %p it_disposition %x\n", it,
486 if (!it_disposition(it, DISP_LOOKUP_NEG)) {
487 rc = ll_prep_inode(&inode, request, (*de)->d_sb, it);
491 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
493 /* We used to query real size from OSTs here, but actually
494 this is not needed. For stat() calls size would be updated
495 from subsequent do_revalidate()->ll_inode_revalidate_it() in
497 vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
498 Everybody else who needs correct file size would call
499 ll_glimpse_size or some equivalent themselves anyway.
500 Also see bug 7198. */
503 /* Only hash *de if it is unhashed (new dentry).
504 * Atoimc_open may passin hashed dentries for open.
506 alias = ll_splice_alias(inode, *de);
508 GOTO(out, rc = PTR_ERR(alias));
512 if (!it_disposition(it, DISP_LOOKUP_NEG)) {
513 /* we have lookup look - unhide dentry */
514 if (bits & MDS_INODELOCK_LOOKUP)
515 d_lustre_revalidate(*de);
516 } else if (!it_disposition(it, DISP_OPEN_CREATE)) {
517 /* If file created on server, don't depend on parent UPDATE
518 * lock to unhide it. It is left hidden and next lookup can
519 * find it in ll_splice_alias.
521 /* Check that parent has UPDATE lock. */
522 struct lookup_intent parent_it = {
524 .it_lock_handle = 0 };
525 struct lu_fid fid = ll_i2info(parent)->lli_fid;
527 /* If it is striped directory, get the real stripe parent */
528 if (unlikely(ll_i2info(parent)->lli_lsm_md != NULL)) {
529 rc = md_get_fid_from_lsm(ll_i2mdexp(parent),
530 ll_i2info(parent)->lli_lsm_md,
532 (*de)->d_name.len, &fid);
537 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it, &fid,
539 d_lustre_revalidate(*de);
540 ll_intent_release(&parent_it);
547 if (rc != 0 && it->it_op & IT_OPEN)
548 ll_open_cleanup((*de)->d_sb, request);
553 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
554 struct lookup_intent *it)
556 struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
557 struct dentry *save = dentry, *retval;
558 struct ptlrpc_request *req = NULL;
559 struct md_op_data *op_data = NULL;
564 if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
565 RETURN(ERR_PTR(-ENAMETOOLONG));
567 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
568 dentry->d_name.len, dentry->d_name.name,
569 PFID(ll_inode2fid(parent)), parent, LL_IT2STR(it));
571 if (d_mountpoint(dentry))
572 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
574 if (it == NULL || it->it_op == IT_GETXATTR)
577 if (it->it_op == IT_GETATTR && dentry_may_statahead(parent, dentry)) {
578 rc = ll_statahead(parent, &dentry, 0);
580 RETURN(dentry == save ? NULL : dentry);
583 if (it->it_op & IT_OPEN && it->it_flags & FMODE_WRITE &&
584 dentry->d_sb->s_flags & MS_RDONLY)
585 RETURN(ERR_PTR(-EROFS));
587 if (it->it_op & IT_CREAT)
588 opc = LUSTRE_OPC_CREATE;
590 opc = LUSTRE_OPC_ANY;
592 op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
593 dentry->d_name.len, 0, opc, NULL);
595 GOTO(out, retval = ERR_CAST(op_data));
597 /* enforce umask if acl disabled or MDS doesn't support umask */
598 if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
599 it->it_create_mode &= ~current_umask();
601 if (it->it_op & IT_CREAT &&
602 ll_i2sbi(parent)->ll_flags & LL_SBI_FILE_SECCTX) {
603 rc = ll_dentry_init_security(dentry, it->it_create_mode,
605 &op_data->op_file_secctx_name,
606 &op_data->op_file_secctx,
607 &op_data->op_file_secctx_size);
609 GOTO(out, retval = ERR_PTR(rc));
612 rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
613 &ll_md_blocking_ast, 0);
614 /* If the MDS allows the client to chgrp (CFS_SETGRP_PERM), but the
615 * client does not know which suppgid should be sent to the MDS, or
616 * some other(s) changed the target file's GID after this RPC sent
617 * to the MDS with the suppgid as the original GID, then we should
618 * try again with right suppgid. */
619 if (rc == -EACCES && it->it_op & IT_OPEN &&
620 it_disposition(it, DISP_OPEN_DENY)) {
621 struct mdt_body *body;
623 LASSERT(req != NULL);
625 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
626 if (op_data->op_suppgids[0] == body->mbo_gid ||
627 op_data->op_suppgids[1] == body->mbo_gid ||
628 !in_group_p(make_kgid(&init_user_ns, body->mbo_gid)))
629 GOTO(out, retval = ERR_PTR(-EACCES));
631 fid_zero(&op_data->op_fid2);
632 op_data->op_suppgids[1] = body->mbo_gid;
633 ptlrpc_req_finished(req);
635 ll_intent_release(it);
636 rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
637 &ll_md_blocking_ast, 0);
641 GOTO(out, retval = ERR_PTR(rc));
643 rc = ll_lookup_it_finish(req, it, parent, &dentry);
645 ll_intent_release(it);
646 GOTO(out, retval = ERR_PTR(rc));
649 if ((it->it_op & IT_OPEN) && dentry->d_inode &&
650 !S_ISREG(dentry->d_inode->i_mode) &&
651 !S_ISDIR(dentry->d_inode->i_mode)) {
652 ll_release_openhandle(dentry, it);
654 ll_lookup_finish_locks(it, dentry);
656 GOTO(out, retval = (dentry == save) ? NULL : dentry);
659 if (op_data != NULL && !IS_ERR(op_data))
660 ll_finish_md_op_data(op_data);
662 ptlrpc_req_finished(req);
666 #ifdef HAVE_IOP_ATOMIC_OPEN
667 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
670 struct lookup_intent *itp, it = { .it_op = IT_GETATTR };
673 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), flags=%u\n",
674 dentry->d_name.len, dentry->d_name.name,
675 PFID(ll_inode2fid(parent)), parent, flags);
678 * Optimize away (CREATE && !OPEN). Let .create handle the race.
679 * but only if we have write permissions there, otherwise we need
680 * to proceed with lookup. LU-4185
682 if ((flags & LOOKUP_CREATE) && !(flags & LOOKUP_OPEN) &&
683 (inode_permission(parent, MAY_WRITE | MAY_EXEC) == 0))
686 if (flags & (LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE))
690 de = ll_lookup_it(parent, dentry, itp);
693 ll_intent_release(itp);
699 * For cached negative dentry and new dentry, handle lookup/create/open
702 static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
703 struct file *file, unsigned open_flags,
704 umode_t mode, int *opened)
706 struct lookup_intent *it;
708 long long lookup_flags = LOOKUP_OPEN;
712 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), file %p,"
713 "open_flags %x, mode %x opened %d\n",
714 dentry->d_name.len, dentry->d_name.name,
715 PFID(ll_inode2fid(dir)), dir, file, open_flags, mode, *opened);
717 /* Only negative dentries enter here */
718 LASSERT(dentry->d_inode == NULL);
720 if (!d_unhashed(dentry)) {
721 /* A valid negative dentry that just passed revalidation,
722 * there's little point to try and open it server-side,
723 * even though there's a minuscule chance it might succeed.
724 * Either way it's a valid race to just return -ENOENT here.
726 if (!(open_flags & O_CREAT))
729 /* Otherwise we just unhash it to be rehashed afresh via
730 * lookup if necessary
735 OBD_ALLOC(it, sizeof(*it));
740 if (open_flags & O_CREAT) {
741 it->it_op |= IT_CREAT;
742 lookup_flags |= LOOKUP_CREATE;
744 it->it_create_mode = (mode & S_IALLUGO) | S_IFREG;
745 it->it_flags = (open_flags & ~O_ACCMODE) | OPEN_FMODE(open_flags);
746 it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
748 /* Dentry added to dcache tree in ll_lookup_it */
749 de = ll_lookup_it(dir, dentry, it);
755 CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
758 if (it_disposition(it, DISP_OPEN_CREATE)) {
759 /* Dentry instantiated in ll_create_it. */
760 rc = ll_create_it(dir, dentry, it);
762 /* We dget in ll_splice_alias. */
768 *opened |= FILE_CREATED;
770 if (dentry->d_inode && it_disposition(it, DISP_OPEN_OPEN)) {
772 if (S_ISFIFO(dentry->d_inode->i_mode)) {
773 /* We cannot call open here as it might
774 * deadlock. This case is unreachable in
775 * practice because of OBD_CONNECT_NODEVOH. */
776 rc = finish_no_open(file, de);
778 file->private_data = it;
779 rc = finish_open(file, dentry, NULL, opened);
780 /* We dget in ll_splice_alias. finish_open takes
781 * care of dget for fd open.
787 rc = finish_no_open(file, de);
792 ll_intent_release(it);
793 OBD_FREE(it, sizeof(*it));
798 #else /* !HAVE_IOP_ATOMIC_OPEN */
799 static struct lookup_intent *
800 ll_convert_intent(struct open_intent *oit, int lookup_flags)
802 struct lookup_intent *it;
806 return ERR_PTR(-ENOMEM);
808 if (lookup_flags & LOOKUP_OPEN) {
810 if (lookup_flags & LOOKUP_CREATE)
811 it->it_op |= IT_CREAT;
812 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
813 it->it_flags = ll_namei_to_lookup_intent_flag(oit->flags);
814 it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
816 it->it_op = IT_GETATTR;
822 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
823 struct nameidata *nd)
828 if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
829 struct lookup_intent *it;
831 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
832 it = ll_d2d(dentry)->lld_it;
833 ll_d2d(dentry)->lld_it = NULL;
836 * Optimize away (CREATE && !OPEN). Let .create handle
837 * the race. But only if we have write permissions
838 * there, otherwise we need to proceed with lookup.
841 if ((nd->flags & LOOKUP_CREATE) &&
842 !(nd->flags & LOOKUP_OPEN) &&
843 (inode_permission(parent,
844 MAY_WRITE | MAY_EXEC) == 0))
847 it = ll_convert_intent(&nd->intent.open, nd->flags);
849 RETURN((struct dentry *)it);
852 de = ll_lookup_it(parent, dentry, it);
855 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
856 if (dentry->d_inode &&
857 it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
858 if (S_ISFIFO(dentry->d_inode->i_mode)) {
859 /* We cannot call open here as it might
860 * deadlock. This case is unreachable in
861 * practice because of
862 * OBD_CONNECT_NODEVOH. */
866 nd->intent.open.file->private_data = it;
867 filp = lookup_instantiate_filp(nd,
873 de = (struct dentry *)filp;
876 } else if (it_disposition(it, DISP_OPEN_CREATE)) {
877 // XXX This can only reliably work on assumption
878 // that there are NO hashed negative dentries.
879 ll_d2d(dentry)->lld_it = it;
880 it = NULL; /* Will be freed in ll_create_nd */
881 /* We absolutely depend on ll_create_nd to be
882 * called to not leak this intent and possible
883 * data attached to it */
888 ll_intent_release(it);
889 OBD_FREE(it, sizeof(*it));
892 de = ll_lookup_it(parent, dentry, NULL);
897 #endif /* HAVE_IOP_ATOMIC_OPEN */
899 /* We depend on "mode" being set with the proper file type/umask by now */
900 static struct inode *ll_create_node(struct inode *dir, struct lookup_intent *it)
902 struct inode *inode = NULL;
903 struct ptlrpc_request *request = NULL;
904 struct ll_sb_info *sbi = ll_i2sbi(dir);
908 LASSERT(it && it->it_disposition);
910 LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
911 request = it->it_request;
912 it_clear_disposition(it, DISP_ENQ_CREATE_REF);
913 rc = ll_prep_inode(&inode, request, dir->i_sb, it);
915 GOTO(out, inode = ERR_PTR(rc));
917 LASSERT(ll_d_hlist_empty(&inode->i_dentry));
919 /* We asked for a lock on the directory, but were granted a
920 * lock on the inode. Since we finally have an inode pointer,
921 * stuff it in the lock. */
922 CDEBUG(D_DLMTRACE, "setting l_ast_data to inode "DFID"(%p)\n",
923 PFID(ll_inode2fid(inode)), inode);
924 ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
927 ptlrpc_req_finished(request);
932 * By the time this is called, we already have created the directory cache
933 * entry for the new file, but it is so far negative - it has no inode.
935 * We defer creating the OBD object(s) until open, to keep the intent and
936 * non-intent code paths similar, and also because we do not have the MDS
937 * inode number before calling ll_create_node() (which is needed for LOV),
938 * so we would need to do yet another RPC to the MDS to store the LOV EA
939 * data on the MDS. If needed, we would pass the PACKED lmm as data and
940 * lmm_size in datalen (the MDS still has code which will handle that).
942 * If the create succeeds, we fill in the inode information
943 * with d_instantiate().
945 static int ll_create_it(struct inode *dir, struct dentry *dentry,
946 struct lookup_intent *it)
952 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
953 dentry->d_name.len, dentry->d_name.name,
954 PFID(ll_inode2fid(dir)), dir, LL_IT2STR(it));
956 rc = it_open_error(DISP_OPEN_CREATE, it);
960 inode = ll_create_node(dir, it);
962 RETURN(PTR_ERR(inode));
964 d_instantiate(dentry, inode);
966 if (!(ll_i2sbi(inode)->ll_flags & LL_SBI_FILE_SECCTX)) {
967 rc = ll_inode_init_security(dentry, inode, dir);
975 void ll_update_times(struct ptlrpc_request *request, struct inode *inode)
977 struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
981 if (body->mbo_valid & OBD_MD_FLMTIME &&
982 body->mbo_mtime > LTIME_S(inode->i_mtime)) {
983 CDEBUG(D_INODE, "setting fid "DFID" mtime from %lu to %llu"
984 "\n", PFID(ll_inode2fid(inode)),
985 LTIME_S(inode->i_mtime), body->mbo_mtime);
986 LTIME_S(inode->i_mtime) = body->mbo_mtime;
989 if (body->mbo_valid & OBD_MD_FLCTIME &&
990 body->mbo_ctime > LTIME_S(inode->i_ctime))
991 LTIME_S(inode->i_ctime) = body->mbo_ctime;
994 static int ll_new_node(struct inode *dir, struct dentry *dchild,
995 const char *tgt, umode_t mode, int rdev, __u32 opc)
997 struct qstr *name = &dchild->d_name;
998 struct ptlrpc_request *request = NULL;
999 struct md_op_data *op_data;
1000 struct inode *inode = NULL;
1001 struct ll_sb_info *sbi = ll_i2sbi(dir);
1006 if (unlikely(tgt != NULL))
1007 tgt_len = strlen(tgt) + 1;
1010 op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1011 name->len, 0, opc, NULL);
1012 if (IS_ERR(op_data))
1013 GOTO(err_exit, err = PTR_ERR(op_data));
1015 if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
1016 err = ll_dentry_init_security(dchild, mode, &dchild->d_name,
1017 &op_data->op_file_secctx_name,
1018 &op_data->op_file_secctx,
1019 &op_data->op_file_secctx_size);
1021 GOTO(err_exit, err);
1024 err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
1025 from_kuid(&init_user_ns, current_fsuid()),
1026 from_kgid(&init_user_ns, current_fsgid()),
1027 cfs_curproc_cap_pack(), rdev, &request);
1028 ll_finish_md_op_data(op_data);
1030 if (err < 0 && err != -EREMOTE)
1031 GOTO(err_exit, err);
1033 /* If the client doesn't know where to create a subdirectory (or
1034 * in case of a race that sends the RPC to the wrong MDS), the
1035 * MDS will return -EREMOTE and the client will fetch the layout
1036 * of the directory, then create the directory on the right MDT. */
1037 if (unlikely(err == -EREMOTE)) {
1038 struct ll_inode_info *lli = ll_i2info(dir);
1039 struct lmv_user_md *lum;
1043 ptlrpc_req_finished(request);
1046 err2 = ll_dir_getstripe(dir, (void **)&lum, &lumsize, &request,
1047 OBD_MD_DEFAULT_MEA);
1049 /* Update stripe_offset and retry */
1050 lli->lli_def_stripe_offset = lum->lum_stripe_offset;
1051 } else if (err2 == -ENODATA &&
1052 lli->lli_def_stripe_offset != -1) {
1053 /* If there are no default stripe EA on the MDT, but the
1054 * client has default stripe, then it probably means
1055 * default stripe EA has just been deleted. */
1056 lli->lli_def_stripe_offset = -1;
1058 GOTO(err_exit, err);
1061 ptlrpc_req_finished(request);
1066 ll_update_times(request, dir);
1068 CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_NEWNODE_PAUSE, cfs_fail_val);
1070 err = ll_prep_inode(&inode, request, dchild->d_sb, NULL);
1072 GOTO(err_exit, err);
1074 d_instantiate(dchild, inode);
1076 if (!(sbi->ll_flags & LL_SBI_FILE_SECCTX)) {
1077 err = ll_inode_init_security(dchild, inode, dir);
1079 GOTO(err_exit, err);
1084 if (request != NULL)
1085 ptlrpc_req_finished(request);
1087 if (!IS_ERR_OR_NULL(op_data))
1088 ll_finish_md_op_data(op_data);
1093 static int ll_mknod(struct inode *dir, struct dentry *dchild, ll_umode_t mode,
1096 struct qstr *name = &dchild->d_name;
1100 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p) mode %o dev %x\n",
1101 name->len, name->name, PFID(ll_inode2fid(dir)), dir,
1104 if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1105 mode &= ~current_umask();
1107 switch (mode & S_IFMT) {
1109 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
1115 err = ll_new_node(dir, dchild, NULL, mode, old_encode_dev(rdev),
1126 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD, 1);
1131 #ifdef HAVE_IOP_ATOMIC_OPEN
1133 * Plain create. Intent create is handled in atomic_open.
1135 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1136 umode_t mode, bool want_excl)
1140 CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1142 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), "
1143 "flags=%u, excl=%d\n", dentry->d_name.len,
1144 dentry->d_name.name, PFID(ll_inode2fid(dir)),
1145 dir, mode, want_excl);
1147 rc = ll_mknod(dir, dentry, mode, 0);
1149 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1151 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, unhashed %d\n",
1152 dentry->d_name.len, dentry->d_name.name, d_unhashed(dentry));
1156 #else /* !HAVE_IOP_ATOMIC_OPEN */
1157 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1158 ll_umode_t mode, struct nameidata *nd)
1160 struct ll_dentry_data *lld = ll_d2d(dentry);
1161 struct lookup_intent *it = NULL;
1164 CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1170 return ll_mknod(dir, dentry, mode, 0);
1174 /* Was there an error? Propagate it! */
1175 if (it->it_status) {
1180 rc = ll_create_it(dir, dentry, it);
1181 if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
1184 nd->intent.open.file->private_data = it;
1185 filp = lookup_instantiate_filp(nd, dentry, NULL);
1191 ll_intent_release(it);
1192 OBD_FREE(it, sizeof(*it));
1195 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1199 #endif /* HAVE_IOP_ATOMIC_OPEN */
1201 static int ll_symlink(struct inode *dir, struct dentry *dchild,
1202 const char *oldpath)
1204 struct qstr *name = &dchild->d_name;
1208 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), target=%.*s\n",
1209 name->len, name->name, PFID(ll_inode2fid(dir)),
1210 dir, 3000, oldpath);
1212 err = ll_new_node(dir, dchild, oldpath, S_IFLNK | S_IRWXUGO, 0,
1213 LUSTRE_OPC_SYMLINK);
1216 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK, 1);
1221 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1222 struct dentry *new_dentry)
1224 struct inode *src = old_dentry->d_inode;
1225 struct qstr *name = &new_dentry->d_name;
1226 struct ll_sb_info *sbi = ll_i2sbi(dir);
1227 struct ptlrpc_request *request = NULL;
1228 struct md_op_data *op_data;
1232 CDEBUG(D_VFSTRACE, "VFS Op: inode="DFID"(%p), dir="DFID"(%p), "
1233 "target=%.*s\n", PFID(ll_inode2fid(src)), src,
1234 PFID(ll_inode2fid(dir)), dir, name->len, name->name);
1236 op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
1237 0, LUSTRE_OPC_ANY, NULL);
1238 if (IS_ERR(op_data))
1239 RETURN(PTR_ERR(op_data));
1241 err = md_link(sbi->ll_md_exp, op_data, &request);
1242 ll_finish_md_op_data(op_data);
1246 ll_update_times(request, dir);
1247 ll_stats_ops_tally(sbi, LPROC_LL_LINK, 1);
1250 ptlrpc_req_finished(request);
1254 static int ll_mkdir(struct inode *dir, struct dentry *dchild, ll_umode_t mode)
1256 struct qstr *name = &dchild->d_name;
1260 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1261 name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1263 if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1264 mode &= ~current_umask();
1266 mode = (mode & (S_IRWXUGO|S_ISVTX)) | S_IFDIR;
1268 err = ll_new_node(dir, dchild, NULL, mode, 0, LUSTRE_OPC_MKDIR);
1270 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR, 1);
1275 static int ll_rmdir(struct inode *dir, struct dentry *dchild)
1277 struct qstr *name = &dchild->d_name;
1278 struct ptlrpc_request *request = NULL;
1279 struct md_op_data *op_data;
1283 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1284 name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1286 if (unlikely(d_mountpoint(dchild)))
1289 op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1290 S_IFDIR, LUSTRE_OPC_ANY, NULL);
1291 if (IS_ERR(op_data))
1292 RETURN(PTR_ERR(op_data));
1294 if (dchild->d_inode != NULL)
1295 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1297 op_data->op_fid2 = op_data->op_fid3;
1298 rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1299 ll_finish_md_op_data(op_data);
1301 ll_update_times(request, dir);
1302 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1305 ptlrpc_req_finished(request);
1312 int ll_rmdir_entry(struct inode *dir, char *name, int namelen)
1314 struct ptlrpc_request *request = NULL;
1315 struct md_op_data *op_data;
1319 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1320 namelen, name, PFID(ll_inode2fid(dir)), dir);
1322 op_data = ll_prep_md_op_data(NULL, dir, NULL, name, strlen(name),
1323 S_IFDIR, LUSTRE_OPC_ANY, NULL);
1324 if (IS_ERR(op_data))
1325 RETURN(PTR_ERR(op_data));
1326 op_data->op_cli_flags |= CLI_RM_ENTRY;
1327 rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1328 ll_finish_md_op_data(op_data);
1330 ll_update_times(request, dir);
1331 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1334 ptlrpc_req_finished(request);
1338 static int ll_unlink(struct inode *dir, struct dentry *dchild)
1340 struct qstr *name = &dchild->d_name;
1341 struct ptlrpc_request *request = NULL;
1342 struct md_op_data *op_data;
1345 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1346 name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1349 * XXX: unlink bind mountpoint maybe call to here,
1350 * just check it as vfs_unlink does.
1352 if (unlikely(d_mountpoint(dchild)))
1355 op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len, 0,
1356 LUSTRE_OPC_ANY, NULL);
1357 if (IS_ERR(op_data))
1358 RETURN(PTR_ERR(op_data));
1360 if (dchild->d_inode != NULL)
1361 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1363 op_data->op_fid2 = op_data->op_fid3;
1364 rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1365 ll_finish_md_op_data(op_data);
1369 ll_update_times(request, dir);
1370 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK, 1);
1373 ptlrpc_req_finished(request);
1377 static int ll_rename(struct inode *src, struct dentry *src_dchild,
1378 struct inode *tgt, struct dentry *tgt_dchild)
1380 struct qstr *src_name = &src_dchild->d_name;
1381 struct qstr *tgt_name = &tgt_dchild->d_name;
1382 struct ptlrpc_request *request = NULL;
1383 struct ll_sb_info *sbi = ll_i2sbi(src);
1384 struct md_op_data *op_data;
1387 CDEBUG(D_VFSTRACE, "VFS Op:oldname=%.*s, src_dir="DFID
1388 "(%p), newname=%.*s, tgt_dir="DFID"(%p)\n",
1389 src_name->len, src_name->name,
1390 PFID(ll_inode2fid(src)), src, tgt_name->len,
1391 tgt_name->name, PFID(ll_inode2fid(tgt)), tgt);
1393 if (unlikely(d_mountpoint(src_dchild) || d_mountpoint(tgt_dchild)))
1396 op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1397 LUSTRE_OPC_ANY, NULL);
1398 if (IS_ERR(op_data))
1399 RETURN(PTR_ERR(op_data));
1401 if (src_dchild->d_inode != NULL)
1402 op_data->op_fid3 = *ll_inode2fid(src_dchild->d_inode);
1404 if (tgt_dchild->d_inode != NULL)
1405 op_data->op_fid4 = *ll_inode2fid(tgt_dchild->d_inode);
1407 err = md_rename(sbi->ll_md_exp, op_data,
1408 src_name->name, src_name->len,
1409 tgt_name->name, tgt_name->len, &request);
1410 ll_finish_md_op_data(op_data);
1412 ll_update_times(request, src);
1413 ll_update_times(request, tgt);
1414 ll_stats_ops_tally(sbi, LPROC_LL_RENAME, 1);
1417 ptlrpc_req_finished(request);
1420 d_move(src_dchild, tgt_dchild);
1425 const struct inode_operations ll_dir_inode_operations = {
1427 #ifdef HAVE_IOP_ATOMIC_OPEN
1428 .atomic_open = ll_atomic_open,
1430 .lookup = ll_lookup_nd,
1431 .create = ll_create_nd,
1432 /* We need all these non-raw things for NFSD, to not patch it. */
1433 .unlink = ll_unlink,
1436 .symlink = ll_symlink,
1438 .rename = ll_rename,
1439 .setattr = ll_setattr,
1440 .getattr = ll_getattr,
1441 .permission = ll_inode_permission,
1442 .setxattr = ll_setxattr,
1443 .getxattr = ll_getxattr,
1444 .listxattr = ll_listxattr,
1445 .removexattr = ll_removexattr,
1446 #ifdef HAVE_IOP_GET_ACL
1447 .get_acl = ll_get_acl,
1451 const struct inode_operations ll_special_inode_operations = {
1452 .setattr = ll_setattr,
1453 .getattr = ll_getattr,
1454 .permission = ll_inode_permission,
1455 .setxattr = ll_setxattr,
1456 .getxattr = ll_getxattr,
1457 .listxattr = ll_listxattr,
1458 .removexattr = ll_removexattr,
1459 #ifdef HAVE_IOP_GET_ACL
1460 .get_acl = ll_get_acl,