1203 lines
32 KiB
C
1203 lines
32 KiB
C
/*
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* GPL HEADER START
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 only,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License version 2 for more details (a copy is included
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* in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU General Public License
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* version 2 along with this program; If not, see
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* http://www.gnu.org/licenses/gpl-2.0.html
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*
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* GPL HEADER END
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*/
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/*
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* Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
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* Use is subject to license terms.
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*
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* Copyright (c) 2011, 2015, Intel Corporation.
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*/
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/*
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* This file is part of Lustre, http://www.lustre.org/
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* Lustre is a trademark of Sun Microsystems, Inc.
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*/
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#include <linux/fs.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/quotaops.h>
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#include <linux/highmem.h>
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#include <linux/pagemap.h>
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#include <linux/security.h>
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#define DEBUG_SUBSYSTEM S_LLITE
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#include "../include/obd_support.h"
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#include "../include/lustre_fid.h"
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#include "../include/lustre_dlm.h"
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#include "../include/lustre_ver.h"
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#include "llite_internal.h"
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static int ll_create_it(struct inode *dir, struct dentry *dentry,
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struct lookup_intent *it);
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/* called from iget5_locked->find_inode() under inode_hash_lock spinlock */
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static int ll_test_inode(struct inode *inode, void *opaque)
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{
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struct ll_inode_info *lli = ll_i2info(inode);
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struct lustre_md *md = opaque;
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if (unlikely(!(md->body->mbo_valid & OBD_MD_FLID))) {
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CERROR("MDS body missing FID\n");
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return 0;
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}
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if (!lu_fid_eq(&lli->lli_fid, &md->body->mbo_fid1))
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return 0;
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return 1;
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}
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static int ll_set_inode(struct inode *inode, void *opaque)
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{
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struct ll_inode_info *lli = ll_i2info(inode);
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struct mdt_body *body = ((struct lustre_md *)opaque)->body;
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if (unlikely(!(body->mbo_valid & OBD_MD_FLID))) {
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CERROR("MDS body missing FID\n");
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return -EINVAL;
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}
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lli->lli_fid = body->mbo_fid1;
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if (unlikely(!(body->mbo_valid & OBD_MD_FLTYPE))) {
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CERROR("Can not initialize inode " DFID
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" without object type: valid = %#llx\n",
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PFID(&lli->lli_fid), body->mbo_valid);
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return -EINVAL;
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}
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inode->i_mode = (inode->i_mode & ~S_IFMT) | (body->mbo_mode & S_IFMT);
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if (unlikely(inode->i_mode == 0)) {
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CERROR("Invalid inode "DFID" type\n", PFID(&lli->lli_fid));
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return -EINVAL;
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}
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ll_lli_init(lli);
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return 0;
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}
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/**
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* Get an inode by inode number(@hash), which is already instantiated by
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* the intent lookup).
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*/
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struct inode *ll_iget(struct super_block *sb, ino_t hash,
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struct lustre_md *md)
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{
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struct inode *inode;
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int rc = 0;
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LASSERT(hash != 0);
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inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
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if (!inode)
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return ERR_PTR(-ENOMEM);
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if (inode->i_state & I_NEW) {
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rc = ll_read_inode2(inode, md);
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if (!rc && S_ISREG(inode->i_mode) &&
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!ll_i2info(inode)->lli_clob)
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rc = cl_file_inode_init(inode, md);
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if (rc) {
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/*
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* Let's clear directory lsm here, otherwise
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* make_bad_inode() will reset the inode mode
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* to regular, then ll_clear_inode will not
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* be able to clear lsm_md
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*/
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if (S_ISDIR(inode->i_mode))
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ll_dir_clear_lsm_md(inode);
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make_bad_inode(inode);
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unlock_new_inode(inode);
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iput(inode);
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inode = ERR_PTR(rc);
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} else {
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unlock_new_inode(inode);
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}
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} else if (!(inode->i_state & (I_FREEING | I_CLEAR))) {
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rc = ll_update_inode(inode, md);
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CDEBUG(D_VFSTRACE, "got inode: "DFID"(%p): rc = %d\n",
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PFID(&md->body->mbo_fid1), inode, rc);
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if (rc) {
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if (S_ISDIR(inode->i_mode))
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ll_dir_clear_lsm_md(inode);
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iput(inode);
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inode = ERR_PTR(rc);
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}
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}
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return inode;
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}
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static void ll_invalidate_negative_children(struct inode *dir)
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{
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struct dentry *dentry, *tmp_subdir;
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spin_lock(&dir->i_lock);
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hlist_for_each_entry(dentry, &dir->i_dentry, d_u.d_alias) {
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spin_lock(&dentry->d_lock);
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if (!list_empty(&dentry->d_subdirs)) {
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struct dentry *child;
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list_for_each_entry_safe(child, tmp_subdir,
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&dentry->d_subdirs,
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d_child) {
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if (d_really_is_negative(child))
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d_lustre_invalidate(child, 1);
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}
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}
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spin_unlock(&dentry->d_lock);
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}
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spin_unlock(&dir->i_lock);
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}
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int ll_test_inode_by_fid(struct inode *inode, void *opaque)
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{
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return lu_fid_eq(&ll_i2info(inode)->lli_fid, opaque);
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}
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int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
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void *data, int flag)
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{
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struct lustre_handle lockh;
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int rc;
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switch (flag) {
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case LDLM_CB_BLOCKING:
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ldlm_lock2handle(lock, &lockh);
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rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
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if (rc < 0) {
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CDEBUG(D_INODE, "ldlm_cli_cancel: rc = %d\n", rc);
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return rc;
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}
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break;
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case LDLM_CB_CANCELING: {
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struct inode *inode = ll_inode_from_resource_lock(lock);
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__u64 bits = lock->l_policy_data.l_inodebits.bits;
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/* Inode is set to lock->l_resource->lr_lvb_inode
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* for mdc - bug 24555
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*/
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LASSERT(!lock->l_ast_data);
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if (!inode)
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break;
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/* Invalidate all dentries associated with this inode */
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LASSERT(ldlm_is_canceling(lock));
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if (!fid_res_name_eq(ll_inode2fid(inode),
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&lock->l_resource->lr_name)) {
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LDLM_ERROR(lock, "data mismatch with object "DFID"(%p)",
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PFID(ll_inode2fid(inode)), inode);
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LBUG();
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}
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if (bits & MDS_INODELOCK_XATTR) {
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if (S_ISDIR(inode->i_mode))
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ll_i2info(inode)->lli_def_stripe_offset = -1;
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ll_xattr_cache_destroy(inode);
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bits &= ~MDS_INODELOCK_XATTR;
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}
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/* For OPEN locks we differentiate between lock modes
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* LCK_CR, LCK_CW, LCK_PR - bug 22891
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*/
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if (bits & MDS_INODELOCK_OPEN)
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ll_have_md_lock(inode, &bits, lock->l_req_mode);
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if (bits & MDS_INODELOCK_OPEN) {
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fmode_t fmode;
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switch (lock->l_req_mode) {
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case LCK_CW:
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fmode = FMODE_WRITE;
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break;
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case LCK_PR:
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fmode = FMODE_EXEC;
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break;
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case LCK_CR:
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fmode = FMODE_READ;
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break;
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default:
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LDLM_ERROR(lock, "bad lock mode for OPEN lock");
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LBUG();
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}
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ll_md_real_close(inode, fmode);
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}
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if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
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MDS_INODELOCK_LAYOUT | MDS_INODELOCK_PERM))
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ll_have_md_lock(inode, &bits, LCK_MINMODE);
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if (bits & MDS_INODELOCK_LAYOUT) {
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struct cl_object_conf conf = {
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.coc_opc = OBJECT_CONF_INVALIDATE,
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.coc_inode = inode,
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};
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rc = ll_layout_conf(inode, &conf);
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if (rc < 0)
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CDEBUG(D_INODE, "cannot invalidate layout of "
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DFID": rc = %d\n",
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PFID(ll_inode2fid(inode)), rc);
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}
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if (bits & MDS_INODELOCK_UPDATE) {
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struct ll_inode_info *lli = ll_i2info(inode);
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spin_lock(&lli->lli_lock);
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LTIME_S(inode->i_mtime) = 0;
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LTIME_S(inode->i_atime) = 0;
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LTIME_S(inode->i_ctime) = 0;
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spin_unlock(&lli->lli_lock);
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}
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if ((bits & MDS_INODELOCK_UPDATE) && S_ISDIR(inode->i_mode)) {
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struct ll_inode_info *lli = ll_i2info(inode);
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CDEBUG(D_INODE, "invalidating inode "DFID" lli = %p, pfid = "DFID"\n",
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PFID(ll_inode2fid(inode)), lli,
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PFID(&lli->lli_pfid));
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truncate_inode_pages(inode->i_mapping, 0);
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if (unlikely(!fid_is_zero(&lli->lli_pfid))) {
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struct inode *master_inode = NULL;
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unsigned long hash;
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/*
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* This is slave inode, since all of the child
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* dentry is connected on the master inode, so
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* we have to invalidate the negative children
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* on master inode
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*/
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CDEBUG(D_INODE, "Invalidate s"DFID" m"DFID"\n",
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PFID(ll_inode2fid(inode)),
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PFID(&lli->lli_pfid));
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hash = cl_fid_build_ino(&lli->lli_pfid,
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ll_need_32bit_api(ll_i2sbi(inode)));
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/*
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* Do not lookup the inode with ilookup5,
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* otherwise it will cause dead lock,
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*
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* 1. Client1 send chmod req to the MDT0, then
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* on MDT0, it enqueues master and all of its
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* slaves lock, (mdt_attr_set() ->
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* mdt_lock_slaves()), after gets master and
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* stripe0 lock, it will send the enqueue req
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* (for stripe1) to MDT1, then MDT1 finds the
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* lock has been granted to client2. Then MDT1
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* sends blocking ast to client2.
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*
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* 2. At the same time, client2 tries to unlink
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* the striped dir (rm -rf striped_dir), and
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* during lookup, it will hold the master inode
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* of the striped directory, whose inode state
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* is NEW, then tries to revalidate all of its
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* slaves, (ll_prep_inode()->ll_iget()->
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* ll_read_inode2()-> ll_update_inode().). And
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* it will be blocked on the server side because
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* of 1.
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*
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* 3. Then the client get the blocking_ast req,
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* cancel the lock, but being blocked if using
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* ->ilookup5()), because master inode state is
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* NEW.
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*/
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master_inode = ilookup5_nowait(inode->i_sb,
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hash,
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ll_test_inode_by_fid,
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(void *)&lli->lli_pfid);
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if (master_inode) {
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ll_invalidate_negative_children(master_inode);
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iput(master_inode);
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}
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} else {
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ll_invalidate_negative_children(inode);
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}
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}
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if ((bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM)) &&
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inode->i_sb->s_root &&
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!is_root_inode(inode))
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ll_invalidate_aliases(inode);
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iput(inode);
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break;
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}
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default:
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LBUG();
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}
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return 0;
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}
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__u32 ll_i2suppgid(struct inode *i)
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{
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if (in_group_p(i->i_gid))
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return (__u32)from_kgid(&init_user_ns, i->i_gid);
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else
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return (__u32)(-1);
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}
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/* Pack the required supplementary groups into the supplied groups array.
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* If we don't need to use the groups from the target inode(s) then we
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* instead pack one or more groups from the user's supplementary group
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* array in case it might be useful. Not needed if doing an MDS-side upcall.
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*/
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void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
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{
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LASSERT(i1);
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suppgids[0] = ll_i2suppgid(i1);
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if (i2)
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suppgids[1] = ll_i2suppgid(i2);
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else
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suppgids[1] = -1;
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}
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/*
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* try to reuse three types of dentry:
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* 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
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* by concurrent .revalidate).
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* 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
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* be cleared by others calling d_lustre_revalidate).
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* 3. DISCONNECTED alias.
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*/
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static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
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{
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struct dentry *alias, *discon_alias, *invalid_alias;
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if (hlist_empty(&inode->i_dentry))
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return NULL;
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discon_alias = NULL;
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invalid_alias = NULL;
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spin_lock(&inode->i_lock);
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hlist_for_each_entry(alias, &inode->i_dentry, d_u.d_alias) {
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LASSERT(alias != dentry);
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spin_lock(&alias->d_lock);
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if ((alias->d_flags & DCACHE_DISCONNECTED) &&
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S_ISDIR(inode->i_mode))
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/* LASSERT(last_discon == NULL); LU-405, bz 20055 */
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discon_alias = alias;
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else if (alias->d_parent == dentry->d_parent &&
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alias->d_name.hash == dentry->d_name.hash &&
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alias->d_name.len == dentry->d_name.len &&
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memcmp(alias->d_name.name, dentry->d_name.name,
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dentry->d_name.len) == 0)
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invalid_alias = alias;
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spin_unlock(&alias->d_lock);
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if (invalid_alias)
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break;
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}
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alias = invalid_alias ?: discon_alias ?: NULL;
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if (alias) {
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spin_lock(&alias->d_lock);
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dget_dlock(alias);
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spin_unlock(&alias->d_lock);
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}
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spin_unlock(&inode->i_lock);
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return alias;
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}
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/*
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* Similar to d_splice_alias(), but lustre treats invalid alias
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* similar to DCACHE_DISCONNECTED, and tries to use it anyway.
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*/
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struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
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{
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if (inode) {
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struct dentry *new = ll_find_alias(inode, de);
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if (new) {
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d_move(new, de);
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iput(inode);
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CDEBUG(D_DENTRY,
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"Reuse dentry %p inode %p refc %d flags %#x\n",
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new, d_inode(new), d_count(new), new->d_flags);
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return new;
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}
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}
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d_add(de, inode);
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CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
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de, d_inode(de), d_count(de), de->d_flags);
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return de;
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}
|
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|
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static int ll_lookup_it_finish(struct ptlrpc_request *request,
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struct lookup_intent *it,
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struct inode *parent, struct dentry **de)
|
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{
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struct inode *inode = NULL;
|
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__u64 bits = 0;
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int rc = 0;
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struct dentry *alias;
|
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|
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/* NB 1 request reference will be taken away by ll_intent_lock()
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* when I return
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*/
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CDEBUG(D_DENTRY, "it %p it_disposition %x\n", it,
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it->it_disposition);
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if (!it_disposition(it, DISP_LOOKUP_NEG)) {
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rc = ll_prep_inode(&inode, request, (*de)->d_sb, it);
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if (rc)
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return rc;
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ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
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|
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/* We used to query real size from OSTs here, but actually
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* this is not needed. For stat() calls size would be updated
|
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* from subsequent do_revalidate()->ll_inode_revalidate_it() in
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* 2.4 and
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* vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
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* Everybody else who needs correct file size would call
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* ll_glimpse_size or some equivalent themselves anyway.
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* Also see bug 7198.
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*/
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}
|
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|
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alias = ll_splice_alias(inode, *de);
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if (IS_ERR(alias)) {
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rc = PTR_ERR(alias);
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goto out;
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}
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*de = alias;
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|
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if (!it_disposition(it, DISP_LOOKUP_NEG)) {
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/* we have lookup look - unhide dentry */
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if (bits & MDS_INODELOCK_LOOKUP)
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d_lustre_revalidate(*de);
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} else if (!it_disposition(it, DISP_OPEN_CREATE)) {
|
|
/* If file created on server, don't depend on parent UPDATE
|
|
* lock to unhide it. It is left hidden and next lookup can
|
|
* find it in ll_splice_alias.
|
|
*/
|
|
/* Check that parent has UPDATE lock. */
|
|
struct lookup_intent parent_it = {
|
|
.it_op = IT_GETATTR,
|
|
.it_lock_handle = 0 };
|
|
struct lu_fid fid = ll_i2info(parent)->lli_fid;
|
|
|
|
/* If it is striped directory, get the real stripe parent */
|
|
if (unlikely(ll_i2info(parent)->lli_lsm_md)) {
|
|
rc = md_get_fid_from_lsm(ll_i2mdexp(parent),
|
|
ll_i2info(parent)->lli_lsm_md,
|
|
(*de)->d_name.name,
|
|
(*de)->d_name.len, &fid);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it, &fid,
|
|
NULL)) {
|
|
d_lustre_revalidate(*de);
|
|
ll_intent_release(&parent_it);
|
|
}
|
|
}
|
|
|
|
out:
|
|
if (rc != 0 && it->it_op & IT_OPEN)
|
|
ll_open_cleanup((*de)->d_sb, request);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
|
|
struct lookup_intent *it)
|
|
{
|
|
struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
|
|
struct dentry *save = dentry, *retval;
|
|
struct ptlrpc_request *req = NULL;
|
|
struct md_op_data *op_data = NULL;
|
|
struct inode *inode;
|
|
__u32 opc;
|
|
int rc;
|
|
|
|
if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
|
|
return ERR_PTR(-ENAMETOOLONG);
|
|
|
|
CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p),intent=%s\n",
|
|
dentry, PFID(ll_inode2fid(parent)), parent, LL_IT2STR(it));
|
|
|
|
if (d_mountpoint(dentry))
|
|
CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
|
|
|
|
if (!it || it->it_op == IT_GETXATTR)
|
|
it = &lookup_it;
|
|
|
|
if (it->it_op == IT_GETATTR && dentry_may_statahead(parent, dentry)) {
|
|
rc = ll_statahead(parent, &dentry, 0);
|
|
if (rc == 1) {
|
|
if (dentry == save)
|
|
retval = NULL;
|
|
else
|
|
retval = dentry;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (it->it_op & IT_OPEN && it->it_flags & FMODE_WRITE &&
|
|
dentry->d_sb->s_flags & MS_RDONLY)
|
|
return ERR_PTR(-EROFS);
|
|
|
|
if (it->it_op & IT_CREAT)
|
|
opc = LUSTRE_OPC_CREATE;
|
|
else
|
|
opc = LUSTRE_OPC_ANY;
|
|
|
|
op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
|
|
dentry->d_name.len, 0, opc, NULL);
|
|
if (IS_ERR(op_data))
|
|
return (void *)op_data;
|
|
|
|
/* enforce umask if acl disabled or MDS doesn't support umask */
|
|
if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
|
|
it->it_create_mode &= ~current_umask();
|
|
|
|
rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
|
|
&ll_md_blocking_ast, 0);
|
|
/*
|
|
* If the MDS allows the client to chgrp (CFS_SETGRP_PERM), but the
|
|
* client does not know which suppgid should be sent to the MDS, or
|
|
* some other(s) changed the target file's GID after this RPC sent
|
|
* to the MDS with the suppgid as the original GID, then we should
|
|
* try again with right suppgid.
|
|
*/
|
|
if (rc == -EACCES && it->it_op & IT_OPEN &&
|
|
it_disposition(it, DISP_OPEN_DENY)) {
|
|
struct mdt_body *body;
|
|
|
|
LASSERT(req);
|
|
|
|
body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
|
|
if (op_data->op_suppgids[0] == body->mbo_gid ||
|
|
op_data->op_suppgids[1] == body->mbo_gid ||
|
|
!in_group_p(make_kgid(&init_user_ns, body->mbo_gid))) {
|
|
retval = ERR_PTR(-EACCES);
|
|
goto out;
|
|
}
|
|
|
|
fid_zero(&op_data->op_fid2);
|
|
op_data->op_suppgids[1] = body->mbo_gid;
|
|
ptlrpc_req_finished(req);
|
|
req = NULL;
|
|
ll_intent_release(it);
|
|
rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
|
|
ll_md_blocking_ast, 0);
|
|
}
|
|
|
|
if (rc < 0) {
|
|
retval = ERR_PTR(rc);
|
|
goto out;
|
|
}
|
|
|
|
rc = ll_lookup_it_finish(req, it, parent, &dentry);
|
|
if (rc != 0) {
|
|
ll_intent_release(it);
|
|
retval = ERR_PTR(rc);
|
|
goto out;
|
|
}
|
|
|
|
inode = d_inode(dentry);
|
|
if ((it->it_op & IT_OPEN) && inode &&
|
|
!S_ISREG(inode->i_mode) &&
|
|
!S_ISDIR(inode->i_mode)) {
|
|
ll_release_openhandle(inode, it);
|
|
}
|
|
ll_lookup_finish_locks(it, inode);
|
|
|
|
if (dentry == save)
|
|
retval = NULL;
|
|
else
|
|
retval = dentry;
|
|
out:
|
|
if (op_data && !IS_ERR(op_data))
|
|
ll_finish_md_op_data(op_data);
|
|
|
|
ptlrpc_req_finished(req);
|
|
return retval;
|
|
}
|
|
|
|
static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
|
|
unsigned int flags)
|
|
{
|
|
struct lookup_intent *itp, it = { .it_op = IT_GETATTR };
|
|
struct dentry *de;
|
|
|
|
CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p),flags=%u\n",
|
|
dentry, PFID(ll_inode2fid(parent)), parent, flags);
|
|
|
|
/* Optimize away (CREATE && !OPEN). Let .create handle the race.
|
|
* but only if we have write permissions there, otherwise we need
|
|
* to proceed with lookup. LU-4185
|
|
*/
|
|
if ((flags & LOOKUP_CREATE) && !(flags & LOOKUP_OPEN) &&
|
|
(inode_permission(parent, MAY_WRITE | MAY_EXEC) == 0))
|
|
return NULL;
|
|
|
|
if (flags & (LOOKUP_PARENT | LOOKUP_OPEN | LOOKUP_CREATE))
|
|
itp = NULL;
|
|
else
|
|
itp = ⁢
|
|
de = ll_lookup_it(parent, dentry, itp);
|
|
|
|
if (itp)
|
|
ll_intent_release(itp);
|
|
|
|
return de;
|
|
}
|
|
|
|
/*
|
|
* For cached negative dentry and new dentry, handle lookup/create/open
|
|
* together.
|
|
*/
|
|
static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
|
|
struct file *file, unsigned open_flags,
|
|
umode_t mode, int *opened)
|
|
{
|
|
struct lookup_intent *it;
|
|
struct dentry *de;
|
|
int rc = 0;
|
|
|
|
CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p),file %p,open_flags %x,mode %x opened %d\n",
|
|
dentry, PFID(ll_inode2fid(dir)), dir, file, open_flags, mode,
|
|
*opened);
|
|
|
|
/* Only negative dentries enter here */
|
|
LASSERT(!d_inode(dentry));
|
|
|
|
if (!d_in_lookup(dentry)) {
|
|
/* A valid negative dentry that just passed revalidation,
|
|
* there's little point to try and open it server-side,
|
|
* even though there's a minuscle chance it might succeed.
|
|
* Either way it's a valid race to just return -ENOENT here.
|
|
*/
|
|
if (!(open_flags & O_CREAT))
|
|
return -ENOENT;
|
|
|
|
/* Otherwise we just unhash it to be rehashed afresh via
|
|
* lookup if necessary
|
|
*/
|
|
d_drop(dentry);
|
|
}
|
|
|
|
it = kzalloc(sizeof(*it), GFP_NOFS);
|
|
if (!it)
|
|
return -ENOMEM;
|
|
|
|
it->it_op = IT_OPEN;
|
|
if (open_flags & O_CREAT)
|
|
it->it_op |= IT_CREAT;
|
|
it->it_create_mode = (mode & S_IALLUGO) | S_IFREG;
|
|
it->it_flags = (open_flags & ~O_ACCMODE) | OPEN_FMODE(open_flags);
|
|
it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
|
|
|
|
/* Dentry added to dcache tree in ll_lookup_it */
|
|
de = ll_lookup_it(dir, dentry, it);
|
|
if (IS_ERR(de))
|
|
rc = PTR_ERR(de);
|
|
else if (de)
|
|
dentry = de;
|
|
|
|
if (!rc) {
|
|
if (it_disposition(it, DISP_OPEN_CREATE)) {
|
|
/* Dentry instantiated in ll_create_it. */
|
|
rc = ll_create_it(dir, dentry, it);
|
|
if (rc) {
|
|
/* We dget in ll_splice_alias. */
|
|
if (de)
|
|
dput(de);
|
|
goto out_release;
|
|
}
|
|
|
|
*opened |= FILE_CREATED;
|
|
}
|
|
if (d_really_is_positive(dentry) && it_disposition(it, DISP_OPEN_OPEN)) {
|
|
/* Open dentry. */
|
|
if (S_ISFIFO(d_inode(dentry)->i_mode)) {
|
|
/* We cannot call open here as it might
|
|
* deadlock. This case is unreachable in
|
|
* practice because of OBD_CONNECT_NODEVOH.
|
|
*/
|
|
rc = finish_no_open(file, de);
|
|
} else {
|
|
file->private_data = it;
|
|
rc = finish_open(file, dentry, NULL, opened);
|
|
/* We dget in ll_splice_alias. finish_open takes
|
|
* care of dget for fd open.
|
|
*/
|
|
if (de)
|
|
dput(de);
|
|
}
|
|
} else {
|
|
rc = finish_no_open(file, de);
|
|
}
|
|
}
|
|
|
|
out_release:
|
|
ll_intent_release(it);
|
|
kfree(it);
|
|
|
|
return rc;
|
|
}
|
|
|
|
/* We depend on "mode" being set with the proper file type/umask by now */
|
|
static struct inode *ll_create_node(struct inode *dir, struct lookup_intent *it)
|
|
{
|
|
struct inode *inode = NULL;
|
|
struct ptlrpc_request *request = NULL;
|
|
struct ll_sb_info *sbi = ll_i2sbi(dir);
|
|
int rc;
|
|
|
|
LASSERT(it && it->it_disposition);
|
|
|
|
LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
|
|
request = it->it_request;
|
|
it_clear_disposition(it, DISP_ENQ_CREATE_REF);
|
|
rc = ll_prep_inode(&inode, request, dir->i_sb, it);
|
|
if (rc) {
|
|
inode = ERR_PTR(rc);
|
|
goto out;
|
|
}
|
|
|
|
LASSERT(hlist_empty(&inode->i_dentry));
|
|
|
|
/* We asked for a lock on the directory, but were granted a
|
|
* lock on the inode. Since we finally have an inode pointer,
|
|
* stuff it in the lock.
|
|
*/
|
|
CDEBUG(D_DLMTRACE, "setting l_ast_data to inode "DFID"(%p)\n",
|
|
PFID(ll_inode2fid(dir)), inode);
|
|
ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
|
|
out:
|
|
ptlrpc_req_finished(request);
|
|
return inode;
|
|
}
|
|
|
|
/*
|
|
* By the time this is called, we already have created the directory cache
|
|
* entry for the new file, but it is so far negative - it has no inode.
|
|
*
|
|
* We defer creating the OBD object(s) until open, to keep the intent and
|
|
* non-intent code paths similar, and also because we do not have the MDS
|
|
* inode number before calling ll_create_node() (which is needed for LOV),
|
|
* so we would need to do yet another RPC to the MDS to store the LOV EA
|
|
* data on the MDS. If needed, we would pass the PACKED lmm as data and
|
|
* lmm_size in datalen (the MDS still has code which will handle that).
|
|
*
|
|
* If the create succeeds, we fill in the inode information
|
|
* with d_instantiate().
|
|
*/
|
|
static int ll_create_it(struct inode *dir, struct dentry *dentry,
|
|
struct lookup_intent *it)
|
|
{
|
|
struct inode *inode;
|
|
int rc = 0;
|
|
|
|
CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p), intent=%s\n",
|
|
dentry, PFID(ll_inode2fid(dir)), dir, LL_IT2STR(it));
|
|
|
|
rc = it_open_error(DISP_OPEN_CREATE, it);
|
|
if (rc)
|
|
return rc;
|
|
|
|
inode = ll_create_node(dir, it);
|
|
if (IS_ERR(inode))
|
|
return PTR_ERR(inode);
|
|
|
|
d_instantiate(dentry, inode);
|
|
|
|
return ll_init_security(dentry, inode, dir);
|
|
}
|
|
|
|
void ll_update_times(struct ptlrpc_request *request, struct inode *inode)
|
|
{
|
|
struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
|
|
&RMF_MDT_BODY);
|
|
|
|
LASSERT(body);
|
|
if (body->mbo_valid & OBD_MD_FLMTIME &&
|
|
body->mbo_mtime > LTIME_S(inode->i_mtime)) {
|
|
CDEBUG(D_INODE, "setting fid "DFID" mtime from %lu to %llu\n",
|
|
PFID(ll_inode2fid(inode)), LTIME_S(inode->i_mtime),
|
|
body->mbo_mtime);
|
|
LTIME_S(inode->i_mtime) = body->mbo_mtime;
|
|
}
|
|
if (body->mbo_valid & OBD_MD_FLCTIME &&
|
|
body->mbo_ctime > LTIME_S(inode->i_ctime))
|
|
LTIME_S(inode->i_ctime) = body->mbo_ctime;
|
|
}
|
|
|
|
static int ll_new_node(struct inode *dir, struct dentry *dentry,
|
|
const char *tgt, umode_t mode, int rdev,
|
|
__u32 opc)
|
|
{
|
|
struct ptlrpc_request *request = NULL;
|
|
struct md_op_data *op_data;
|
|
struct inode *inode = NULL;
|
|
struct ll_sb_info *sbi = ll_i2sbi(dir);
|
|
int tgt_len = 0;
|
|
int err;
|
|
|
|
if (unlikely(tgt))
|
|
tgt_len = strlen(tgt) + 1;
|
|
again:
|
|
op_data = ll_prep_md_op_data(NULL, dir, NULL,
|
|
dentry->d_name.name,
|
|
dentry->d_name.len,
|
|
0, opc, NULL);
|
|
if (IS_ERR(op_data)) {
|
|
err = PTR_ERR(op_data);
|
|
goto err_exit;
|
|
}
|
|
|
|
err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
|
|
from_kuid(&init_user_ns, current_fsuid()),
|
|
from_kgid(&init_user_ns, current_fsgid()),
|
|
cfs_curproc_cap_pack(), rdev, &request);
|
|
ll_finish_md_op_data(op_data);
|
|
if (err < 0 && err != -EREMOTE)
|
|
goto err_exit;
|
|
|
|
/*
|
|
* If the client doesn't know where to create a subdirectory (or
|
|
* in case of a race that sends the RPC to the wrong MDS), the
|
|
* MDS will return -EREMOTE and the client will fetch the layout
|
|
* of the directory, then create the directory on the right MDT.
|
|
*/
|
|
if (unlikely(err == -EREMOTE)) {
|
|
struct ll_inode_info *lli = ll_i2info(dir);
|
|
struct lmv_user_md *lum;
|
|
int lumsize, err2;
|
|
|
|
ptlrpc_req_finished(request);
|
|
request = NULL;
|
|
|
|
err2 = ll_dir_getstripe(dir, (void **)&lum, &lumsize, &request,
|
|
OBD_MD_DEFAULT_MEA);
|
|
if (!err2) {
|
|
/* Update stripe_offset and retry */
|
|
lli->lli_def_stripe_offset = lum->lum_stripe_offset;
|
|
} else if (err2 == -ENODATA &&
|
|
lli->lli_def_stripe_offset != -1) {
|
|
/*
|
|
* If there are no default stripe EA on the MDT, but the
|
|
* client has default stripe, then it probably means
|
|
* default stripe EA has just been deleted.
|
|
*/
|
|
lli->lli_def_stripe_offset = -1;
|
|
} else {
|
|
goto err_exit;
|
|
}
|
|
|
|
ptlrpc_req_finished(request);
|
|
request = NULL;
|
|
goto again;
|
|
}
|
|
|
|
ll_update_times(request, dir);
|
|
|
|
err = ll_prep_inode(&inode, request, dir->i_sb, NULL);
|
|
if (err)
|
|
goto err_exit;
|
|
|
|
d_instantiate(dentry, inode);
|
|
|
|
err = ll_init_security(dentry, inode, dir);
|
|
err_exit:
|
|
if (request)
|
|
ptlrpc_req_finished(request);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int ll_mknod(struct inode *dir, struct dentry *dchild,
|
|
umode_t mode, dev_t rdev)
|
|
{
|
|
int err;
|
|
|
|
CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p) mode %o dev %x\n",
|
|
dchild, PFID(ll_inode2fid(dir)), dir, mode,
|
|
old_encode_dev(rdev));
|
|
|
|
if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
|
|
mode &= ~current_umask();
|
|
|
|
switch (mode & S_IFMT) {
|
|
case 0:
|
|
mode |= S_IFREG; /* for mode = 0 case, fallthrough */
|
|
case S_IFREG:
|
|
case S_IFCHR:
|
|
case S_IFBLK:
|
|
case S_IFIFO:
|
|
case S_IFSOCK:
|
|
err = ll_new_node(dir, dchild, NULL, mode,
|
|
old_encode_dev(rdev),
|
|
LUSTRE_OPC_MKNOD);
|
|
break;
|
|
case S_IFDIR:
|
|
err = -EPERM;
|
|
break;
|
|
default:
|
|
err = -EINVAL;
|
|
}
|
|
|
|
if (!err)
|
|
ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD, 1);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Plain create. Intent create is handled in atomic_open.
|
|
*/
|
|
static int ll_create_nd(struct inode *dir, struct dentry *dentry,
|
|
umode_t mode, bool want_excl)
|
|
{
|
|
int rc;
|
|
|
|
CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p), flags=%u, excl=%d\n",
|
|
dentry, PFID(ll_inode2fid(dir)), dir, mode, want_excl);
|
|
|
|
rc = ll_mknod(dir, dentry, mode, 0);
|
|
|
|
ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
|
|
|
|
CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, unhashed %d\n",
|
|
dentry, d_unhashed(dentry));
|
|
|
|
return rc;
|
|
}
|
|
|
|
/* ll_unlink() doesn't update the inode with the new link count.
|
|
* Instead, ll_ddelete() and ll_d_iput() will update it based upon if there
|
|
* is any lock existing. They will recycle dentries and inodes based upon locks
|
|
* too. b=20433
|
|
*/
|
|
static int ll_unlink(struct inode *dir, struct dentry *dchild)
|
|
{
|
|
struct ptlrpc_request *request = NULL;
|
|
struct md_op_data *op_data;
|
|
int rc;
|
|
|
|
CDEBUG(D_VFSTRACE, "VFS Op:name=%pd,dir=%lu/%u(%p)\n",
|
|
dchild, dir->i_ino, dir->i_generation, dir);
|
|
|
|
op_data = ll_prep_md_op_data(NULL, dir, NULL,
|
|
dchild->d_name.name,
|
|
dchild->d_name.len,
|
|
0, LUSTRE_OPC_ANY, NULL);
|
|
if (IS_ERR(op_data))
|
|
return PTR_ERR(op_data);
|
|
|
|
if (dchild->d_inode)
|
|
op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
|
|
|
|
op_data->op_fid2 = op_data->op_fid3;
|
|
rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
|
|
ll_finish_md_op_data(op_data);
|
|
if (rc)
|
|
goto out;
|
|
|
|
ll_update_times(request, dir);
|
|
ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK, 1);
|
|
|
|
out:
|
|
ptlrpc_req_finished(request);
|
|
return rc;
|
|
}
|
|
|
|
static int ll_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
|
|
{
|
|
int err;
|
|
|
|
CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir"DFID"(%p)\n",
|
|
dentry, PFID(ll_inode2fid(dir)), dir);
|
|
|
|
if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
|
|
mode &= ~current_umask();
|
|
mode = (mode & (S_IRWXUGO | S_ISVTX)) | S_IFDIR;
|
|
|
|
err = ll_new_node(dir, dentry, NULL, mode, 0, LUSTRE_OPC_MKDIR);
|
|
if (!err)
|
|
ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR, 1);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int ll_rmdir(struct inode *dir, struct dentry *dchild)
|
|
{
|
|
struct ptlrpc_request *request = NULL;
|
|
struct md_op_data *op_data;
|
|
int rc;
|
|
|
|
CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p)\n",
|
|
dchild, PFID(ll_inode2fid(dir)), dir);
|
|
|
|
op_data = ll_prep_md_op_data(NULL, dir, NULL,
|
|
dchild->d_name.name,
|
|
dchild->d_name.len,
|
|
S_IFDIR, LUSTRE_OPC_ANY, NULL);
|
|
if (IS_ERR(op_data))
|
|
return PTR_ERR(op_data);
|
|
|
|
if (dchild->d_inode)
|
|
op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
|
|
|
|
op_data->op_fid2 = op_data->op_fid3;
|
|
rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
|
|
ll_finish_md_op_data(op_data);
|
|
if (rc == 0) {
|
|
ll_update_times(request, dir);
|
|
ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
|
|
}
|
|
|
|
ptlrpc_req_finished(request);
|
|
return rc;
|
|
}
|
|
|
|
static int ll_symlink(struct inode *dir, struct dentry *dentry,
|
|
const char *oldname)
|
|
{
|
|
int err;
|
|
|
|
CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, dir="DFID"(%p),target=%.*s\n",
|
|
dentry, PFID(ll_inode2fid(dir)), dir, 3000, oldname);
|
|
|
|
err = ll_new_node(dir, dentry, oldname, S_IFLNK | S_IRWXUGO,
|
|
0, LUSTRE_OPC_SYMLINK);
|
|
|
|
if (!err)
|
|
ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK, 1);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int ll_link(struct dentry *old_dentry, struct inode *dir,
|
|
struct dentry *new_dentry)
|
|
{
|
|
struct inode *src = d_inode(old_dentry);
|
|
struct ll_sb_info *sbi = ll_i2sbi(dir);
|
|
struct ptlrpc_request *request = NULL;
|
|
struct md_op_data *op_data;
|
|
int err;
|
|
|
|
CDEBUG(D_VFSTRACE, "VFS Op: inode="DFID"(%p), dir="DFID"(%p), target=%pd\n",
|
|
PFID(ll_inode2fid(src)), src, PFID(ll_inode2fid(dir)), dir,
|
|
new_dentry);
|
|
|
|
op_data = ll_prep_md_op_data(NULL, src, dir, new_dentry->d_name.name,
|
|
new_dentry->d_name.len,
|
|
0, LUSTRE_OPC_ANY, NULL);
|
|
if (IS_ERR(op_data))
|
|
return PTR_ERR(op_data);
|
|
|
|
err = md_link(sbi->ll_md_exp, op_data, &request);
|
|
ll_finish_md_op_data(op_data);
|
|
if (err)
|
|
goto out;
|
|
|
|
ll_update_times(request, dir);
|
|
ll_stats_ops_tally(sbi, LPROC_LL_LINK, 1);
|
|
out:
|
|
ptlrpc_req_finished(request);
|
|
return err;
|
|
}
|
|
|
|
static int ll_rename(struct inode *src, struct dentry *src_dchild,
|
|
struct inode *tgt, struct dentry *tgt_dchild,
|
|
unsigned int flags)
|
|
{
|
|
struct ptlrpc_request *request = NULL;
|
|
struct ll_sb_info *sbi = ll_i2sbi(src);
|
|
struct md_op_data *op_data;
|
|
int err;
|
|
|
|
if (flags)
|
|
return -EINVAL;
|
|
|
|
CDEBUG(D_VFSTRACE,
|
|
"VFS Op:oldname=%pd, src_dir="DFID"(%p), newname=%pd, tgt_dir="DFID"(%p)\n",
|
|
src_dchild, PFID(ll_inode2fid(src)), src,
|
|
tgt_dchild, PFID(ll_inode2fid(tgt)), tgt);
|
|
|
|
op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
|
|
LUSTRE_OPC_ANY, NULL);
|
|
if (IS_ERR(op_data))
|
|
return PTR_ERR(op_data);
|
|
|
|
if (src_dchild->d_inode)
|
|
op_data->op_fid3 = *ll_inode2fid(src_dchild->d_inode);
|
|
if (tgt_dchild->d_inode)
|
|
op_data->op_fid4 = *ll_inode2fid(tgt_dchild->d_inode);
|
|
|
|
err = md_rename(sbi->ll_md_exp, op_data,
|
|
src_dchild->d_name.name,
|
|
src_dchild->d_name.len,
|
|
tgt_dchild->d_name.name,
|
|
tgt_dchild->d_name.len, &request);
|
|
ll_finish_md_op_data(op_data);
|
|
if (!err) {
|
|
ll_update_times(request, src);
|
|
ll_update_times(request, tgt);
|
|
ll_stats_ops_tally(sbi, LPROC_LL_RENAME, 1);
|
|
}
|
|
|
|
ptlrpc_req_finished(request);
|
|
if (!err)
|
|
d_move(src_dchild, tgt_dchild);
|
|
return err;
|
|
}
|
|
|
|
const struct inode_operations ll_dir_inode_operations = {
|
|
.mknod = ll_mknod,
|
|
.atomic_open = ll_atomic_open,
|
|
.lookup = ll_lookup_nd,
|
|
.create = ll_create_nd,
|
|
/* We need all these non-raw things for NFSD, to not patch it. */
|
|
.unlink = ll_unlink,
|
|
.mkdir = ll_mkdir,
|
|
.rmdir = ll_rmdir,
|
|
.symlink = ll_symlink,
|
|
.link = ll_link,
|
|
.rename = ll_rename,
|
|
.setattr = ll_setattr,
|
|
.getattr = ll_getattr,
|
|
.permission = ll_inode_permission,
|
|
.listxattr = ll_listxattr,
|
|
.get_acl = ll_get_acl,
|
|
};
|
|
|
|
const struct inode_operations ll_special_inode_operations = {
|
|
.setattr = ll_setattr,
|
|
.getattr = ll_getattr,
|
|
.permission = ll_inode_permission,
|
|
.listxattr = ll_listxattr,
|
|
.get_acl = ll_get_acl,
|
|
};
|