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![Brian Foster](/assets/img/avatar_default.png)
The offset and length parameters are converted from bytes to basic blocks by xfs_vn_fiemap(). The BTOBB() converter rounds the value up to the nearest basic block. This leads to unexpected behavior when unaligned offsets are provided to FIEMAP. Fix the conversions of byte values to block values to cover the provided offsets. Round down the start offset to the nearest basic block. Calculate the end offset based on the provided values, round up and calculate length based on the start block offset. Reported-by: Chandan Rajendra <chandan@linux.vnet.ibm.com> Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
1299 lines
33 KiB
C
1299 lines
33 KiB
C
/*
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* Copyright (c) 2000-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_shared.h"
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#include "xfs_format.h"
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#include "xfs_log_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_mount.h"
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#include "xfs_da_format.h"
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#include "xfs_inode.h"
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#include "xfs_bmap.h"
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#include "xfs_bmap_util.h"
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#include "xfs_acl.h"
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#include "xfs_quota.h"
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#include "xfs_error.h"
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#include "xfs_attr.h"
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#include "xfs_trans.h"
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#include "xfs_trace.h"
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#include "xfs_icache.h"
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#include "xfs_symlink.h"
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#include "xfs_da_btree.h"
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#include "xfs_dir2_priv.h"
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#include "xfs_dinode.h"
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#include "xfs_trans_space.h"
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#include <linux/capability.h>
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#include <linux/xattr.h>
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#include <linux/namei.h>
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#include <linux/posix_acl.h>
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#include <linux/security.h>
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#include <linux/fiemap.h>
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#include <linux/slab.h>
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/*
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* Directories have different lock order w.r.t. mmap_sem compared to regular
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* files. This is due to readdir potentially triggering page faults on a user
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* buffer inside filldir(), and this happens with the ilock on the directory
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* held. For regular files, the lock order is the other way around - the
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* mmap_sem is taken during the page fault, and then we lock the ilock to do
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* block mapping. Hence we need a different class for the directory ilock so
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* that lockdep can tell them apart.
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*/
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static struct lock_class_key xfs_nondir_ilock_class;
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static struct lock_class_key xfs_dir_ilock_class;
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static int
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xfs_initxattrs(
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struct inode *inode,
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const struct xattr *xattr_array,
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void *fs_info)
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{
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const struct xattr *xattr;
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struct xfs_inode *ip = XFS_I(inode);
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int error = 0;
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for (xattr = xattr_array; xattr->name != NULL; xattr++) {
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error = xfs_attr_set(ip, xattr->name, xattr->value,
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xattr->value_len, ATTR_SECURE);
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if (error < 0)
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break;
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}
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return error;
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}
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/*
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* Hook in SELinux. This is not quite correct yet, what we really need
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* here (as we do for default ACLs) is a mechanism by which creation of
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* these attrs can be journalled at inode creation time (along with the
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* inode, of course, such that log replay can't cause these to be lost).
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*/
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STATIC int
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xfs_init_security(
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struct inode *inode,
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struct inode *dir,
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const struct qstr *qstr)
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{
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return security_inode_init_security(inode, dir, qstr,
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&xfs_initxattrs, NULL);
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}
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static void
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xfs_dentry_to_name(
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struct xfs_name *namep,
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struct dentry *dentry,
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int mode)
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{
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namep->name = dentry->d_name.name;
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namep->len = dentry->d_name.len;
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namep->type = xfs_mode_to_ftype[(mode & S_IFMT) >> S_SHIFT];
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}
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STATIC void
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xfs_cleanup_inode(
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struct inode *dir,
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struct inode *inode,
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struct dentry *dentry)
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{
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struct xfs_name teardown;
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/* Oh, the horror.
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* If we can't add the ACL or we fail in
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* xfs_init_security we must back out.
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* ENOSPC can hit here, among other things.
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*/
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xfs_dentry_to_name(&teardown, dentry, 0);
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xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
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}
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STATIC int
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xfs_generic_create(
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struct inode *dir,
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struct dentry *dentry,
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umode_t mode,
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dev_t rdev,
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bool tmpfile) /* unnamed file */
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{
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struct inode *inode;
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struct xfs_inode *ip = NULL;
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struct posix_acl *default_acl, *acl;
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struct xfs_name name;
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int error;
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/*
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* Irix uses Missed'em'V split, but doesn't want to see
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* the upper 5 bits of (14bit) major.
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*/
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if (S_ISCHR(mode) || S_ISBLK(mode)) {
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if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
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return -EINVAL;
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rdev = sysv_encode_dev(rdev);
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} else {
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rdev = 0;
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}
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error = posix_acl_create(dir, &mode, &default_acl, &acl);
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if (error)
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return error;
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if (!tmpfile) {
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xfs_dentry_to_name(&name, dentry, mode);
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error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip);
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} else {
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error = xfs_create_tmpfile(XFS_I(dir), dentry, mode, &ip);
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}
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if (unlikely(error))
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goto out_free_acl;
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inode = VFS_I(ip);
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error = xfs_init_security(inode, dir, &dentry->d_name);
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if (unlikely(error))
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goto out_cleanup_inode;
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#ifdef CONFIG_XFS_POSIX_ACL
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if (default_acl) {
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error = xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
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if (error)
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goto out_cleanup_inode;
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}
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if (acl) {
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error = xfs_set_acl(inode, acl, ACL_TYPE_ACCESS);
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if (error)
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goto out_cleanup_inode;
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}
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#endif
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if (tmpfile)
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d_tmpfile(dentry, inode);
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else
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d_instantiate(dentry, inode);
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out_free_acl:
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if (default_acl)
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posix_acl_release(default_acl);
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if (acl)
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posix_acl_release(acl);
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return error;
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out_cleanup_inode:
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if (!tmpfile)
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xfs_cleanup_inode(dir, inode, dentry);
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iput(inode);
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goto out_free_acl;
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}
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STATIC int
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xfs_vn_mknod(
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struct inode *dir,
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struct dentry *dentry,
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umode_t mode,
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dev_t rdev)
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{
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return xfs_generic_create(dir, dentry, mode, rdev, false);
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}
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STATIC int
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xfs_vn_create(
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struct inode *dir,
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struct dentry *dentry,
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umode_t mode,
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bool flags)
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{
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return xfs_vn_mknod(dir, dentry, mode, 0);
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}
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STATIC int
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xfs_vn_mkdir(
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struct inode *dir,
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struct dentry *dentry,
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umode_t mode)
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{
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return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
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}
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STATIC struct dentry *
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xfs_vn_lookup(
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struct inode *dir,
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struct dentry *dentry,
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unsigned int flags)
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{
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struct xfs_inode *cip;
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struct xfs_name name;
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int error;
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if (dentry->d_name.len >= MAXNAMELEN)
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return ERR_PTR(-ENAMETOOLONG);
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xfs_dentry_to_name(&name, dentry, 0);
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error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
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if (unlikely(error)) {
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if (unlikely(error != -ENOENT))
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return ERR_PTR(error);
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d_add(dentry, NULL);
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return NULL;
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}
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return d_splice_alias(VFS_I(cip), dentry);
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}
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STATIC struct dentry *
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xfs_vn_ci_lookup(
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struct inode *dir,
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struct dentry *dentry,
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unsigned int flags)
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{
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struct xfs_inode *ip;
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struct xfs_name xname;
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struct xfs_name ci_name;
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struct qstr dname;
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int error;
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if (dentry->d_name.len >= MAXNAMELEN)
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return ERR_PTR(-ENAMETOOLONG);
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xfs_dentry_to_name(&xname, dentry, 0);
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error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
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if (unlikely(error)) {
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if (unlikely(error != -ENOENT))
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return ERR_PTR(error);
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/*
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* call d_add(dentry, NULL) here when d_drop_negative_children
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* is called in xfs_vn_mknod (ie. allow negative dentries
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* with CI filesystems).
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*/
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return NULL;
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}
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/* if exact match, just splice and exit */
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if (!ci_name.name)
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return d_splice_alias(VFS_I(ip), dentry);
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/* else case-insensitive match... */
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dname.name = ci_name.name;
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dname.len = ci_name.len;
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dentry = d_add_ci(dentry, VFS_I(ip), &dname);
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kmem_free(ci_name.name);
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return dentry;
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}
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STATIC int
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xfs_vn_link(
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struct dentry *old_dentry,
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struct inode *dir,
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struct dentry *dentry)
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{
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struct inode *inode = old_dentry->d_inode;
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struct xfs_name name;
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int error;
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xfs_dentry_to_name(&name, dentry, inode->i_mode);
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error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
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if (unlikely(error))
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return error;
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ihold(inode);
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d_instantiate(dentry, inode);
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return 0;
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}
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STATIC int
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xfs_vn_unlink(
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struct inode *dir,
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struct dentry *dentry)
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{
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struct xfs_name name;
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int error;
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xfs_dentry_to_name(&name, dentry, 0);
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error = xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode));
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if (error)
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return error;
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/*
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* With unlink, the VFS makes the dentry "negative": no inode,
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* but still hashed. This is incompatible with case-insensitive
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* mode, so invalidate (unhash) the dentry in CI-mode.
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*/
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if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
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d_invalidate(dentry);
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return 0;
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}
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STATIC int
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xfs_vn_symlink(
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struct inode *dir,
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struct dentry *dentry,
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const char *symname)
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{
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struct inode *inode;
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struct xfs_inode *cip = NULL;
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struct xfs_name name;
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int error;
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umode_t mode;
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mode = S_IFLNK |
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(irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO);
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xfs_dentry_to_name(&name, dentry, mode);
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error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip);
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if (unlikely(error))
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goto out;
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inode = VFS_I(cip);
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error = xfs_init_security(inode, dir, &dentry->d_name);
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if (unlikely(error))
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goto out_cleanup_inode;
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d_instantiate(dentry, inode);
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return 0;
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out_cleanup_inode:
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xfs_cleanup_inode(dir, inode, dentry);
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iput(inode);
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out:
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return error;
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}
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STATIC int
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xfs_vn_rename(
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struct inode *odir,
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struct dentry *odentry,
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struct inode *ndir,
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struct dentry *ndentry)
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{
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struct inode *new_inode = ndentry->d_inode;
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struct xfs_name oname;
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struct xfs_name nname;
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xfs_dentry_to_name(&oname, odentry, 0);
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xfs_dentry_to_name(&nname, ndentry, odentry->d_inode->i_mode);
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return xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode),
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XFS_I(ndir), &nname, new_inode ?
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XFS_I(new_inode) : NULL);
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}
|
|
|
|
/*
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* careful here - this function can get called recursively, so
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* we need to be very careful about how much stack we use.
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* uio is kmalloced for this reason...
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*/
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STATIC void *
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xfs_vn_follow_link(
|
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struct dentry *dentry,
|
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struct nameidata *nd)
|
|
{
|
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char *link;
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int error = -ENOMEM;
|
|
|
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link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
|
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if (!link)
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goto out_err;
|
|
|
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error = xfs_readlink(XFS_I(dentry->d_inode), link);
|
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if (unlikely(error))
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goto out_kfree;
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|
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nd_set_link(nd, link);
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return NULL;
|
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|
|
out_kfree:
|
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kfree(link);
|
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out_err:
|
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nd_set_link(nd, ERR_PTR(error));
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return NULL;
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}
|
|
|
|
STATIC int
|
|
xfs_vn_getattr(
|
|
struct vfsmount *mnt,
|
|
struct dentry *dentry,
|
|
struct kstat *stat)
|
|
{
|
|
struct inode *inode = dentry->d_inode;
|
|
struct xfs_inode *ip = XFS_I(inode);
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
|
|
trace_xfs_getattr(ip);
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return -EIO;
|
|
|
|
stat->size = XFS_ISIZE(ip);
|
|
stat->dev = inode->i_sb->s_dev;
|
|
stat->mode = ip->i_d.di_mode;
|
|
stat->nlink = ip->i_d.di_nlink;
|
|
stat->uid = inode->i_uid;
|
|
stat->gid = inode->i_gid;
|
|
stat->ino = ip->i_ino;
|
|
stat->atime = inode->i_atime;
|
|
stat->mtime = inode->i_mtime;
|
|
stat->ctime = inode->i_ctime;
|
|
stat->blocks =
|
|
XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
|
|
|
|
|
|
switch (inode->i_mode & S_IFMT) {
|
|
case S_IFBLK:
|
|
case S_IFCHR:
|
|
stat->blksize = BLKDEV_IOSIZE;
|
|
stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
|
|
sysv_minor(ip->i_df.if_u2.if_rdev));
|
|
break;
|
|
default:
|
|
if (XFS_IS_REALTIME_INODE(ip)) {
|
|
/*
|
|
* If the file blocks are being allocated from a
|
|
* realtime volume, then return the inode's realtime
|
|
* extent size or the realtime volume's extent size.
|
|
*/
|
|
stat->blksize =
|
|
xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
|
|
} else
|
|
stat->blksize = xfs_preferred_iosize(mp);
|
|
stat->rdev = 0;
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
xfs_setattr_mode(
|
|
struct xfs_inode *ip,
|
|
struct iattr *iattr)
|
|
{
|
|
struct inode *inode = VFS_I(ip);
|
|
umode_t mode = iattr->ia_mode;
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
|
|
|
|
ip->i_d.di_mode &= S_IFMT;
|
|
ip->i_d.di_mode |= mode & ~S_IFMT;
|
|
|
|
inode->i_mode &= S_IFMT;
|
|
inode->i_mode |= mode & ~S_IFMT;
|
|
}
|
|
|
|
static void
|
|
xfs_setattr_time(
|
|
struct xfs_inode *ip,
|
|
struct iattr *iattr)
|
|
{
|
|
struct inode *inode = VFS_I(ip);
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
|
|
|
|
if (iattr->ia_valid & ATTR_ATIME) {
|
|
inode->i_atime = iattr->ia_atime;
|
|
ip->i_d.di_atime.t_sec = iattr->ia_atime.tv_sec;
|
|
ip->i_d.di_atime.t_nsec = iattr->ia_atime.tv_nsec;
|
|
}
|
|
if (iattr->ia_valid & ATTR_CTIME) {
|
|
inode->i_ctime = iattr->ia_ctime;
|
|
ip->i_d.di_ctime.t_sec = iattr->ia_ctime.tv_sec;
|
|
ip->i_d.di_ctime.t_nsec = iattr->ia_ctime.tv_nsec;
|
|
}
|
|
if (iattr->ia_valid & ATTR_MTIME) {
|
|
inode->i_mtime = iattr->ia_mtime;
|
|
ip->i_d.di_mtime.t_sec = iattr->ia_mtime.tv_sec;
|
|
ip->i_d.di_mtime.t_nsec = iattr->ia_mtime.tv_nsec;
|
|
}
|
|
}
|
|
|
|
int
|
|
xfs_setattr_nonsize(
|
|
struct xfs_inode *ip,
|
|
struct iattr *iattr,
|
|
int flags)
|
|
{
|
|
xfs_mount_t *mp = ip->i_mount;
|
|
struct inode *inode = VFS_I(ip);
|
|
int mask = iattr->ia_valid;
|
|
xfs_trans_t *tp;
|
|
int error;
|
|
kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID;
|
|
kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID;
|
|
struct xfs_dquot *udqp = NULL, *gdqp = NULL;
|
|
struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL;
|
|
|
|
trace_xfs_setattr(ip);
|
|
|
|
/* If acls are being inherited, we already have this checked */
|
|
if (!(flags & XFS_ATTR_NOACL)) {
|
|
if (mp->m_flags & XFS_MOUNT_RDONLY)
|
|
return -EROFS;
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return -EIO;
|
|
|
|
error = inode_change_ok(inode, iattr);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
ASSERT((mask & ATTR_SIZE) == 0);
|
|
|
|
/*
|
|
* If disk quotas is on, we make sure that the dquots do exist on disk,
|
|
* before we start any other transactions. Trying to do this later
|
|
* is messy. We don't care to take a readlock to look at the ids
|
|
* in inode here, because we can't hold it across the trans_reserve.
|
|
* If the IDs do change before we take the ilock, we're covered
|
|
* because the i_*dquot fields will get updated anyway.
|
|
*/
|
|
if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) {
|
|
uint qflags = 0;
|
|
|
|
if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) {
|
|
uid = iattr->ia_uid;
|
|
qflags |= XFS_QMOPT_UQUOTA;
|
|
} else {
|
|
uid = inode->i_uid;
|
|
}
|
|
if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) {
|
|
gid = iattr->ia_gid;
|
|
qflags |= XFS_QMOPT_GQUOTA;
|
|
} else {
|
|
gid = inode->i_gid;
|
|
}
|
|
|
|
/*
|
|
* We take a reference when we initialize udqp and gdqp,
|
|
* so it is important that we never blindly double trip on
|
|
* the same variable. See xfs_create() for an example.
|
|
*/
|
|
ASSERT(udqp == NULL);
|
|
ASSERT(gdqp == NULL);
|
|
error = xfs_qm_vop_dqalloc(ip, xfs_kuid_to_uid(uid),
|
|
xfs_kgid_to_gid(gid),
|
|
xfs_get_projid(ip),
|
|
qflags, &udqp, &gdqp, NULL);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
|
|
error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
|
|
if (error)
|
|
goto out_dqrele;
|
|
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
|
|
/*
|
|
* Change file ownership. Must be the owner or privileged.
|
|
*/
|
|
if (mask & (ATTR_UID|ATTR_GID)) {
|
|
/*
|
|
* These IDs could have changed since we last looked at them.
|
|
* But, we're assured that if the ownership did change
|
|
* while we didn't have the inode locked, inode's dquot(s)
|
|
* would have changed also.
|
|
*/
|
|
iuid = inode->i_uid;
|
|
igid = inode->i_gid;
|
|
gid = (mask & ATTR_GID) ? iattr->ia_gid : igid;
|
|
uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid;
|
|
|
|
/*
|
|
* Do a quota reservation only if uid/gid is actually
|
|
* going to change.
|
|
*/
|
|
if (XFS_IS_QUOTA_RUNNING(mp) &&
|
|
((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) ||
|
|
(XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) {
|
|
ASSERT(tp);
|
|
error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
|
|
NULL, capable(CAP_FOWNER) ?
|
|
XFS_QMOPT_FORCE_RES : 0);
|
|
if (error) /* out of quota */
|
|
goto out_trans_cancel;
|
|
}
|
|
}
|
|
|
|
xfs_trans_ijoin(tp, ip, 0);
|
|
|
|
/*
|
|
* Change file ownership. Must be the owner or privileged.
|
|
*/
|
|
if (mask & (ATTR_UID|ATTR_GID)) {
|
|
/*
|
|
* CAP_FSETID overrides the following restrictions:
|
|
*
|
|
* The set-user-ID and set-group-ID bits of a file will be
|
|
* cleared upon successful return from chown()
|
|
*/
|
|
if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
|
|
!capable(CAP_FSETID))
|
|
ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
|
|
|
|
/*
|
|
* Change the ownerships and register quota modifications
|
|
* in the transaction.
|
|
*/
|
|
if (!uid_eq(iuid, uid)) {
|
|
if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) {
|
|
ASSERT(mask & ATTR_UID);
|
|
ASSERT(udqp);
|
|
olddquot1 = xfs_qm_vop_chown(tp, ip,
|
|
&ip->i_udquot, udqp);
|
|
}
|
|
ip->i_d.di_uid = xfs_kuid_to_uid(uid);
|
|
inode->i_uid = uid;
|
|
}
|
|
if (!gid_eq(igid, gid)) {
|
|
if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) {
|
|
ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) ||
|
|
!XFS_IS_PQUOTA_ON(mp));
|
|
ASSERT(mask & ATTR_GID);
|
|
ASSERT(gdqp);
|
|
olddquot2 = xfs_qm_vop_chown(tp, ip,
|
|
&ip->i_gdquot, gdqp);
|
|
}
|
|
ip->i_d.di_gid = xfs_kgid_to_gid(gid);
|
|
inode->i_gid = gid;
|
|
}
|
|
}
|
|
|
|
if (mask & ATTR_MODE)
|
|
xfs_setattr_mode(ip, iattr);
|
|
if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
|
|
xfs_setattr_time(ip, iattr);
|
|
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
|
|
XFS_STATS_INC(xs_ig_attrchg);
|
|
|
|
if (mp->m_flags & XFS_MOUNT_WSYNC)
|
|
xfs_trans_set_sync(tp);
|
|
error = xfs_trans_commit(tp, 0);
|
|
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
|
|
/*
|
|
* Release any dquot(s) the inode had kept before chown.
|
|
*/
|
|
xfs_qm_dqrele(olddquot1);
|
|
xfs_qm_dqrele(olddquot2);
|
|
xfs_qm_dqrele(udqp);
|
|
xfs_qm_dqrele(gdqp);
|
|
|
|
if (error)
|
|
return error;
|
|
|
|
/*
|
|
* XXX(hch): Updating the ACL entries is not atomic vs the i_mode
|
|
* update. We could avoid this with linked transactions
|
|
* and passing down the transaction pointer all the way
|
|
* to attr_set. No previous user of the generic
|
|
* Posix ACL code seems to care about this issue either.
|
|
*/
|
|
if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) {
|
|
error = posix_acl_chmod(inode, inode->i_mode);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_trans_cancel:
|
|
xfs_trans_cancel(tp, 0);
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
out_dqrele:
|
|
xfs_qm_dqrele(udqp);
|
|
xfs_qm_dqrele(gdqp);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Truncate file. Must have write permission and not be a directory.
|
|
*/
|
|
int
|
|
xfs_setattr_size(
|
|
struct xfs_inode *ip,
|
|
struct iattr *iattr)
|
|
{
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
struct inode *inode = VFS_I(ip);
|
|
xfs_off_t oldsize, newsize;
|
|
struct xfs_trans *tp;
|
|
int error;
|
|
uint lock_flags = 0;
|
|
uint commit_flags = 0;
|
|
|
|
trace_xfs_setattr(ip);
|
|
|
|
if (mp->m_flags & XFS_MOUNT_RDONLY)
|
|
return -EROFS;
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return -EIO;
|
|
|
|
error = inode_change_ok(inode, iattr);
|
|
if (error)
|
|
return error;
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
|
|
ASSERT(S_ISREG(ip->i_d.di_mode));
|
|
ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET|
|
|
ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0);
|
|
|
|
oldsize = inode->i_size;
|
|
newsize = iattr->ia_size;
|
|
|
|
/*
|
|
* Short circuit the truncate case for zero length files.
|
|
*/
|
|
if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) {
|
|
if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME)))
|
|
return 0;
|
|
|
|
/*
|
|
* Use the regular setattr path to update the timestamps.
|
|
*/
|
|
iattr->ia_valid &= ~ATTR_SIZE;
|
|
return xfs_setattr_nonsize(ip, iattr, 0);
|
|
}
|
|
|
|
/*
|
|
* Make sure that the dquots are attached to the inode.
|
|
*/
|
|
error = xfs_qm_dqattach(ip, 0);
|
|
if (error)
|
|
return error;
|
|
|
|
/*
|
|
* Now we can make the changes. Before we join the inode to the
|
|
* transaction, take care of the part of the truncation that must be
|
|
* done without the inode lock. This needs to be done before joining
|
|
* the inode to the transaction, because the inode cannot be unlocked
|
|
* once it is a part of the transaction.
|
|
*/
|
|
if (newsize > oldsize) {
|
|
/*
|
|
* Do the first part of growing a file: zero any data in the
|
|
* last block that is beyond the old EOF. We need to do this
|
|
* before the inode is joined to the transaction to modify
|
|
* i_size.
|
|
*/
|
|
error = xfs_zero_eof(ip, newsize, oldsize);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* We are going to log the inode size change in this transaction so
|
|
* any previous writes that are beyond the on disk EOF and the new
|
|
* EOF that have not been written out need to be written here. If we
|
|
* do not write the data out, we expose ourselves to the null files
|
|
* problem.
|
|
*
|
|
* Only flush from the on disk size to the smaller of the in memory
|
|
* file size or the new size as that's the range we really care about
|
|
* here and prevents waiting for other data not within the range we
|
|
* care about here.
|
|
*/
|
|
if (oldsize != ip->i_d.di_size && newsize > ip->i_d.di_size) {
|
|
error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
|
|
ip->i_d.di_size, newsize);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Wait for all direct I/O to complete.
|
|
*/
|
|
inode_dio_wait(inode);
|
|
|
|
/*
|
|
* Do all the page cache truncate work outside the transaction context
|
|
* as the "lock" order is page lock->log space reservation. i.e.
|
|
* locking pages inside the transaction can ABBA deadlock with
|
|
* writeback. We have to do the VFS inode size update before we truncate
|
|
* the pagecache, however, to avoid racing with page faults beyond the
|
|
* new EOF they are not serialised against truncate operations except by
|
|
* page locks and size updates.
|
|
*
|
|
* Hence we are in a situation where a truncate can fail with ENOMEM
|
|
* from xfs_trans_reserve(), but having already truncated the in-memory
|
|
* version of the file (i.e. made user visible changes). There's not
|
|
* much we can do about this, except to hope that the caller sees ENOMEM
|
|
* and retries the truncate operation.
|
|
*/
|
|
error = block_truncate_page(inode->i_mapping, newsize, xfs_get_blocks);
|
|
if (error)
|
|
return error;
|
|
truncate_setsize(inode, newsize);
|
|
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE);
|
|
error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0);
|
|
if (error)
|
|
goto out_trans_cancel;
|
|
|
|
commit_flags = XFS_TRANS_RELEASE_LOG_RES;
|
|
lock_flags |= XFS_ILOCK_EXCL;
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_ijoin(tp, ip, 0);
|
|
|
|
/*
|
|
* Only change the c/mtime if we are changing the size or we are
|
|
* explicitly asked to change it. This handles the semantic difference
|
|
* between truncate() and ftruncate() as implemented in the VFS.
|
|
*
|
|
* The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
|
|
* special case where we need to update the times despite not having
|
|
* these flags set. For all other operations the VFS set these flags
|
|
* explicitly if it wants a timestamp update.
|
|
*/
|
|
if (newsize != oldsize &&
|
|
!(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) {
|
|
iattr->ia_ctime = iattr->ia_mtime =
|
|
current_fs_time(inode->i_sb);
|
|
iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
|
|
}
|
|
|
|
/*
|
|
* The first thing we do is set the size to new_size permanently on
|
|
* disk. This way we don't have to worry about anyone ever being able
|
|
* to look at the data being freed even in the face of a crash.
|
|
* What we're getting around here is the case where we free a block, it
|
|
* is allocated to another file, it is written to, and then we crash.
|
|
* If the new data gets written to the file but the log buffers
|
|
* containing the free and reallocation don't, then we'd end up with
|
|
* garbage in the blocks being freed. As long as we make the new size
|
|
* permanent before actually freeing any blocks it doesn't matter if
|
|
* they get written to.
|
|
*/
|
|
ip->i_d.di_size = newsize;
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
|
|
if (newsize <= oldsize) {
|
|
error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize);
|
|
if (error)
|
|
goto out_trans_abort;
|
|
|
|
/*
|
|
* Truncated "down", so we're removing references to old data
|
|
* here - if we delay flushing for a long time, we expose
|
|
* ourselves unduly to the notorious NULL files problem. So,
|
|
* we mark this inode and flush it when the file is closed,
|
|
* and do not wait the usual (long) time for writeout.
|
|
*/
|
|
xfs_iflags_set(ip, XFS_ITRUNCATED);
|
|
|
|
/* A truncate down always removes post-EOF blocks. */
|
|
xfs_inode_clear_eofblocks_tag(ip);
|
|
}
|
|
|
|
if (iattr->ia_valid & ATTR_MODE)
|
|
xfs_setattr_mode(ip, iattr);
|
|
if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
|
|
xfs_setattr_time(ip, iattr);
|
|
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
|
|
XFS_STATS_INC(xs_ig_attrchg);
|
|
|
|
if (mp->m_flags & XFS_MOUNT_WSYNC)
|
|
xfs_trans_set_sync(tp);
|
|
|
|
error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
|
|
out_unlock:
|
|
if (lock_flags)
|
|
xfs_iunlock(ip, lock_flags);
|
|
return error;
|
|
|
|
out_trans_abort:
|
|
commit_flags |= XFS_TRANS_ABORT;
|
|
out_trans_cancel:
|
|
xfs_trans_cancel(tp, commit_flags);
|
|
goto out_unlock;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_setattr(
|
|
struct dentry *dentry,
|
|
struct iattr *iattr)
|
|
{
|
|
struct xfs_inode *ip = XFS_I(dentry->d_inode);
|
|
int error;
|
|
|
|
if (iattr->ia_valid & ATTR_SIZE) {
|
|
xfs_ilock(ip, XFS_IOLOCK_EXCL);
|
|
error = xfs_setattr_size(ip, iattr);
|
|
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
|
|
} else {
|
|
error = xfs_setattr_nonsize(ip, iattr, 0);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_update_time(
|
|
struct inode *inode,
|
|
struct timespec *now,
|
|
int flags)
|
|
{
|
|
struct xfs_inode *ip = XFS_I(inode);
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
struct xfs_trans *tp;
|
|
int error;
|
|
|
|
trace_xfs_update_time(ip);
|
|
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_FSYNC_TS);
|
|
error = xfs_trans_reserve(tp, &M_RES(mp)->tr_fsyncts, 0, 0);
|
|
if (error) {
|
|
xfs_trans_cancel(tp, 0);
|
|
return error;
|
|
}
|
|
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
if (flags & S_CTIME) {
|
|
inode->i_ctime = *now;
|
|
ip->i_d.di_ctime.t_sec = (__int32_t)now->tv_sec;
|
|
ip->i_d.di_ctime.t_nsec = (__int32_t)now->tv_nsec;
|
|
}
|
|
if (flags & S_MTIME) {
|
|
inode->i_mtime = *now;
|
|
ip->i_d.di_mtime.t_sec = (__int32_t)now->tv_sec;
|
|
ip->i_d.di_mtime.t_nsec = (__int32_t)now->tv_nsec;
|
|
}
|
|
if (flags & S_ATIME) {
|
|
inode->i_atime = *now;
|
|
ip->i_d.di_atime.t_sec = (__int32_t)now->tv_sec;
|
|
ip->i_d.di_atime.t_nsec = (__int32_t)now->tv_nsec;
|
|
}
|
|
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
|
|
return xfs_trans_commit(tp, 0);
|
|
}
|
|
|
|
#define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR)
|
|
|
|
/*
|
|
* Call fiemap helper to fill in user data.
|
|
* Returns positive errors to xfs_getbmap.
|
|
*/
|
|
STATIC int
|
|
xfs_fiemap_format(
|
|
void **arg,
|
|
struct getbmapx *bmv,
|
|
int *full)
|
|
{
|
|
int error;
|
|
struct fiemap_extent_info *fieinfo = *arg;
|
|
u32 fiemap_flags = 0;
|
|
u64 logical, physical, length;
|
|
|
|
/* Do nothing for a hole */
|
|
if (bmv->bmv_block == -1LL)
|
|
return 0;
|
|
|
|
logical = BBTOB(bmv->bmv_offset);
|
|
physical = BBTOB(bmv->bmv_block);
|
|
length = BBTOB(bmv->bmv_length);
|
|
|
|
if (bmv->bmv_oflags & BMV_OF_PREALLOC)
|
|
fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN;
|
|
else if (bmv->bmv_oflags & BMV_OF_DELALLOC) {
|
|
fiemap_flags |= (FIEMAP_EXTENT_DELALLOC |
|
|
FIEMAP_EXTENT_UNKNOWN);
|
|
physical = 0; /* no block yet */
|
|
}
|
|
if (bmv->bmv_oflags & BMV_OF_LAST)
|
|
fiemap_flags |= FIEMAP_EXTENT_LAST;
|
|
|
|
error = fiemap_fill_next_extent(fieinfo, logical, physical,
|
|
length, fiemap_flags);
|
|
if (error > 0) {
|
|
error = 0;
|
|
*full = 1; /* user array now full */
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_fiemap(
|
|
struct inode *inode,
|
|
struct fiemap_extent_info *fieinfo,
|
|
u64 start,
|
|
u64 length)
|
|
{
|
|
xfs_inode_t *ip = XFS_I(inode);
|
|
struct getbmapx bm;
|
|
int error;
|
|
|
|
error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS);
|
|
if (error)
|
|
return error;
|
|
|
|
/* Set up bmap header for xfs internal routine */
|
|
bm.bmv_offset = BTOBBT(start);
|
|
/* Special case for whole file */
|
|
if (length == FIEMAP_MAX_OFFSET)
|
|
bm.bmv_length = -1LL;
|
|
else
|
|
bm.bmv_length = BTOBB(start + length) - bm.bmv_offset;
|
|
|
|
/* We add one because in getbmap world count includes the header */
|
|
bm.bmv_count = !fieinfo->fi_extents_max ? MAXEXTNUM :
|
|
fieinfo->fi_extents_max + 1;
|
|
bm.bmv_count = min_t(__s32, bm.bmv_count,
|
|
(PAGE_SIZE * 16 / sizeof(struct getbmapx)));
|
|
bm.bmv_iflags = BMV_IF_PREALLOC | BMV_IF_NO_HOLES;
|
|
if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR)
|
|
bm.bmv_iflags |= BMV_IF_ATTRFORK;
|
|
if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC))
|
|
bm.bmv_iflags |= BMV_IF_DELALLOC;
|
|
|
|
error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo);
|
|
if (error)
|
|
return error;
|
|
|
|
return 0;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_vn_tmpfile(
|
|
struct inode *dir,
|
|
struct dentry *dentry,
|
|
umode_t mode)
|
|
{
|
|
return xfs_generic_create(dir, dentry, mode, 0, true);
|
|
}
|
|
|
|
static const struct inode_operations xfs_inode_operations = {
|
|
.get_acl = xfs_get_acl,
|
|
.set_acl = xfs_set_acl,
|
|
.getattr = xfs_vn_getattr,
|
|
.setattr = xfs_vn_setattr,
|
|
.setxattr = generic_setxattr,
|
|
.getxattr = generic_getxattr,
|
|
.removexattr = generic_removexattr,
|
|
.listxattr = xfs_vn_listxattr,
|
|
.fiemap = xfs_vn_fiemap,
|
|
.update_time = xfs_vn_update_time,
|
|
};
|
|
|
|
static const struct inode_operations xfs_dir_inode_operations = {
|
|
.create = xfs_vn_create,
|
|
.lookup = xfs_vn_lookup,
|
|
.link = xfs_vn_link,
|
|
.unlink = xfs_vn_unlink,
|
|
.symlink = xfs_vn_symlink,
|
|
.mkdir = xfs_vn_mkdir,
|
|
/*
|
|
* Yes, XFS uses the same method for rmdir and unlink.
|
|
*
|
|
* There are some subtile differences deeper in the code,
|
|
* but we use S_ISDIR to check for those.
|
|
*/
|
|
.rmdir = xfs_vn_unlink,
|
|
.mknod = xfs_vn_mknod,
|
|
.rename = xfs_vn_rename,
|
|
.get_acl = xfs_get_acl,
|
|
.set_acl = xfs_set_acl,
|
|
.getattr = xfs_vn_getattr,
|
|
.setattr = xfs_vn_setattr,
|
|
.setxattr = generic_setxattr,
|
|
.getxattr = generic_getxattr,
|
|
.removexattr = generic_removexattr,
|
|
.listxattr = xfs_vn_listxattr,
|
|
.update_time = xfs_vn_update_time,
|
|
.tmpfile = xfs_vn_tmpfile,
|
|
};
|
|
|
|
static const struct inode_operations xfs_dir_ci_inode_operations = {
|
|
.create = xfs_vn_create,
|
|
.lookup = xfs_vn_ci_lookup,
|
|
.link = xfs_vn_link,
|
|
.unlink = xfs_vn_unlink,
|
|
.symlink = xfs_vn_symlink,
|
|
.mkdir = xfs_vn_mkdir,
|
|
/*
|
|
* Yes, XFS uses the same method for rmdir and unlink.
|
|
*
|
|
* There are some subtile differences deeper in the code,
|
|
* but we use S_ISDIR to check for those.
|
|
*/
|
|
.rmdir = xfs_vn_unlink,
|
|
.mknod = xfs_vn_mknod,
|
|
.rename = xfs_vn_rename,
|
|
.get_acl = xfs_get_acl,
|
|
.set_acl = xfs_set_acl,
|
|
.getattr = xfs_vn_getattr,
|
|
.setattr = xfs_vn_setattr,
|
|
.setxattr = generic_setxattr,
|
|
.getxattr = generic_getxattr,
|
|
.removexattr = generic_removexattr,
|
|
.listxattr = xfs_vn_listxattr,
|
|
.update_time = xfs_vn_update_time,
|
|
.tmpfile = xfs_vn_tmpfile,
|
|
};
|
|
|
|
static const struct inode_operations xfs_symlink_inode_operations = {
|
|
.readlink = generic_readlink,
|
|
.follow_link = xfs_vn_follow_link,
|
|
.put_link = kfree_put_link,
|
|
.getattr = xfs_vn_getattr,
|
|
.setattr = xfs_vn_setattr,
|
|
.setxattr = generic_setxattr,
|
|
.getxattr = generic_getxattr,
|
|
.removexattr = generic_removexattr,
|
|
.listxattr = xfs_vn_listxattr,
|
|
.update_time = xfs_vn_update_time,
|
|
};
|
|
|
|
STATIC void
|
|
xfs_diflags_to_iflags(
|
|
struct inode *inode,
|
|
struct xfs_inode *ip)
|
|
{
|
|
if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
|
|
inode->i_flags |= S_IMMUTABLE;
|
|
else
|
|
inode->i_flags &= ~S_IMMUTABLE;
|
|
if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
|
|
inode->i_flags |= S_APPEND;
|
|
else
|
|
inode->i_flags &= ~S_APPEND;
|
|
if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
|
|
inode->i_flags |= S_SYNC;
|
|
else
|
|
inode->i_flags &= ~S_SYNC;
|
|
if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
|
|
inode->i_flags |= S_NOATIME;
|
|
else
|
|
inode->i_flags &= ~S_NOATIME;
|
|
}
|
|
|
|
/*
|
|
* Initialize the Linux inode, set up the operation vectors and
|
|
* unlock the inode.
|
|
*
|
|
* When reading existing inodes from disk this is called directly
|
|
* from xfs_iget, when creating a new inode it is called from
|
|
* xfs_ialloc after setting up the inode.
|
|
*
|
|
* We are always called with an uninitialised linux inode here.
|
|
* We need to initialise the necessary fields and take a reference
|
|
* on it.
|
|
*/
|
|
void
|
|
xfs_setup_inode(
|
|
struct xfs_inode *ip)
|
|
{
|
|
struct inode *inode = &ip->i_vnode;
|
|
gfp_t gfp_mask;
|
|
|
|
inode->i_ino = ip->i_ino;
|
|
inode->i_state = I_NEW;
|
|
|
|
inode_sb_list_add(inode);
|
|
/* make the inode look hashed for the writeback code */
|
|
hlist_add_fake(&inode->i_hash);
|
|
|
|
inode->i_mode = ip->i_d.di_mode;
|
|
set_nlink(inode, ip->i_d.di_nlink);
|
|
inode->i_uid = xfs_uid_to_kuid(ip->i_d.di_uid);
|
|
inode->i_gid = xfs_gid_to_kgid(ip->i_d.di_gid);
|
|
|
|
switch (inode->i_mode & S_IFMT) {
|
|
case S_IFBLK:
|
|
case S_IFCHR:
|
|
inode->i_rdev =
|
|
MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
|
|
sysv_minor(ip->i_df.if_u2.if_rdev));
|
|
break;
|
|
default:
|
|
inode->i_rdev = 0;
|
|
break;
|
|
}
|
|
|
|
inode->i_generation = ip->i_d.di_gen;
|
|
i_size_write(inode, ip->i_d.di_size);
|
|
inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec;
|
|
inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec;
|
|
inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
|
|
inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
|
|
inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
|
|
inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
|
|
xfs_diflags_to_iflags(inode, ip);
|
|
|
|
ip->d_ops = ip->i_mount->m_nondir_inode_ops;
|
|
lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class);
|
|
switch (inode->i_mode & S_IFMT) {
|
|
case S_IFREG:
|
|
inode->i_op = &xfs_inode_operations;
|
|
inode->i_fop = &xfs_file_operations;
|
|
inode->i_mapping->a_ops = &xfs_address_space_operations;
|
|
break;
|
|
case S_IFDIR:
|
|
lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class);
|
|
if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
|
|
inode->i_op = &xfs_dir_ci_inode_operations;
|
|
else
|
|
inode->i_op = &xfs_dir_inode_operations;
|
|
inode->i_fop = &xfs_dir_file_operations;
|
|
ip->d_ops = ip->i_mount->m_dir_inode_ops;
|
|
break;
|
|
case S_IFLNK:
|
|
inode->i_op = &xfs_symlink_inode_operations;
|
|
if (!(ip->i_df.if_flags & XFS_IFINLINE))
|
|
inode->i_mapping->a_ops = &xfs_address_space_operations;
|
|
break;
|
|
default:
|
|
inode->i_op = &xfs_inode_operations;
|
|
init_special_inode(inode, inode->i_mode, inode->i_rdev);
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Ensure all page cache allocations are done from GFP_NOFS context to
|
|
* prevent direct reclaim recursion back into the filesystem and blowing
|
|
* stacks or deadlocking.
|
|
*/
|
|
gfp_mask = mapping_gfp_mask(inode->i_mapping);
|
|
mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS)));
|
|
|
|
/*
|
|
* If there is no attribute fork no ACL can exist on this inode,
|
|
* and it can't have any file capabilities attached to it either.
|
|
*/
|
|
if (!XFS_IFORK_Q(ip)) {
|
|
inode_has_no_xattr(inode);
|
|
cache_no_acl(inode);
|
|
}
|
|
|
|
xfs_iflags_clear(ip, XFS_INEW);
|
|
barrier();
|
|
|
|
unlock_new_inode(inode);
|
|
}
|