mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 10:56:48 +07:00
3d3c8b5222
With the new xfs_trans_res structure has been introduced, the log reservation size, log count as well as log flags are pre-initialized at mount time. So it's time to refine xfs_trans_reserve() interface to be more neat. Also, introduce a new helper M_RES() to return a pointer to the mp->m_resv structure to simplify the input. Signed-off-by: Jie Liu <jeff.liu@oracle.com> Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Mark Tinguely <tinguely@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
1238 lines
30 KiB
C
1238 lines
30 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_format.h"
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#include "xfs_acl.h"
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#include "xfs_log.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_alloc.h"
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#include "xfs_quota.h"
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#include "xfs_mount.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_dinode.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_rtalloc.h"
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#include "xfs_error.h"
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#include "xfs_itable.h"
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#include "xfs_attr.h"
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#include "xfs_buf_item.h"
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#include "xfs_inode_item.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 <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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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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{
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namep->name = dentry->d_name.name;
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namep->len = dentry->d_name.len;
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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);
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xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
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iput(inode);
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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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struct inode *inode;
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struct xfs_inode *ip = NULL;
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struct posix_acl *default_acl = NULL;
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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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if (IS_POSIXACL(dir)) {
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default_acl = xfs_get_acl(dir, ACL_TYPE_DEFAULT);
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if (IS_ERR(default_acl))
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return PTR_ERR(default_acl);
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if (!default_acl)
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mode &= ~current_umask();
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}
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xfs_dentry_to_name(&name, dentry);
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error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip);
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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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if (default_acl) {
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error = -xfs_inherit_acl(inode, default_acl);
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default_acl = NULL;
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if (unlikely(error))
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goto out_cleanup_inode;
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}
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d_instantiate(dentry, inode);
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return -error;
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out_cleanup_inode:
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xfs_cleanup_inode(dir, inode, dentry);
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out_free_acl:
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posix_acl_release(default_acl);
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return -error;
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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);
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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);
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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);
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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);
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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);
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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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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);
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xfs_dentry_to_name(&nname, ndentry);
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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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/*
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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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{
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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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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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}
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STATIC void
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xfs_vn_put_link(
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struct dentry *dentry,
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struct nameidata *nd,
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void *p)
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{
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char *s = nd_get_link(nd);
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if (!IS_ERR(s))
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kfree(s);
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}
|
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|
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STATIC int
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xfs_vn_getattr(
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struct vfsmount *mnt,
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struct dentry *dentry,
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struct kstat *stat)
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{
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struct inode *inode = dentry->d_inode;
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struct xfs_inode *ip = XFS_I(inode);
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struct xfs_mount *mp = ip->i_mount;
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|
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trace_xfs_getattr(ip);
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|
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if (XFS_FORCED_SHUTDOWN(mp))
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return -XFS_ERROR(EIO);
|
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|
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stat->size = XFS_ISIZE(ip);
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stat->dev = inode->i_sb->s_dev;
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stat->mode = ip->i_d.di_mode;
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stat->nlink = ip->i_d.di_nlink;
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stat->uid = ip->i_d.di_uid;
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stat->gid = ip->i_d.di_gid;
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stat->ino = ip->i_ino;
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stat->atime = inode->i_atime;
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stat->mtime = inode->i_mtime;
|
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stat->ctime = inode->i_ctime;
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stat->blocks =
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XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
|
|
|
|
|
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switch (inode->i_mode & S_IFMT) {
|
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case S_IFBLK:
|
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case S_IFCHR:
|
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stat->blksize = BLKDEV_IOSIZE;
|
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stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
|
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sysv_minor(ip->i_df.if_u2.if_rdev));
|
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break;
|
|
default:
|
|
if (XFS_IS_REALTIME_INODE(ip)) {
|
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/*
|
|
* 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.
|
|
*/
|
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stat->blksize =
|
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xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
|
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} else
|
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stat->blksize = xfs_preferred_iosize(mp);
|
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stat->rdev = 0;
|
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break;
|
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}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
xfs_setattr_mode(
|
|
struct xfs_trans *tp,
|
|
struct xfs_inode *ip,
|
|
struct iattr *iattr)
|
|
{
|
|
struct inode *inode = VFS_I(ip);
|
|
umode_t mode = iattr->ia_mode;
|
|
|
|
ASSERT(tp);
|
|
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;
|
|
}
|
|
|
|
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;
|
|
uid_t uid = 0, iuid = 0;
|
|
gid_t gid = 0, igid = 0;
|
|
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 XFS_ERROR(EROFS);
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return XFS_ERROR(EIO);
|
|
|
|
error = -inode_change_ok(inode, iattr);
|
|
if (error)
|
|
return XFS_ERROR(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 = ip->i_d.di_uid;
|
|
}
|
|
if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) {
|
|
gid = iattr->ia_gid;
|
|
qflags |= XFS_QMOPT_GQUOTA;
|
|
} else {
|
|
gid = ip->i_d.di_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, uid, 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 = ip->i_d.di_uid;
|
|
igid = ip->i_d.di_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) && iuid != uid) ||
|
|
(XFS_IS_GQUOTA_ON(mp) && 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 (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 = uid;
|
|
inode->i_uid = uid;
|
|
}
|
|
if (igid != gid) {
|
|
if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) {
|
|
ASSERT(!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 = gid;
|
|
inode->i_gid = gid;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Change file access modes.
|
|
*/
|
|
if (mask & ATTR_MODE)
|
|
xfs_setattr_mode(tp, ip, iattr);
|
|
|
|
/*
|
|
* Change file access or modified times.
|
|
*/
|
|
if (mask & 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 (mask & 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 (mask & 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;
|
|
}
|
|
|
|
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 XFS_ERROR(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 = -xfs_acl_chmod(inode);
|
|
if (error)
|
|
return XFS_ERROR(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,
|
|
int flags)
|
|
{
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
struct inode *inode = VFS_I(ip);
|
|
int mask = iattr->ia_valid;
|
|
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 XFS_ERROR(EROFS);
|
|
|
|
if (XFS_FORCED_SHUTDOWN(mp))
|
|
return XFS_ERROR(EIO);
|
|
|
|
error = -inode_change_ok(inode, iattr);
|
|
if (error)
|
|
return XFS_ERROR(error);
|
|
|
|
ASSERT(S_ISREG(ip->i_d.di_mode));
|
|
ASSERT((mask & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET|
|
|
ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0);
|
|
|
|
if (!(flags & XFS_ATTR_NOLOCK)) {
|
|
lock_flags |= XFS_IOLOCK_EXCL;
|
|
xfs_ilock(ip, lock_flags);
|
|
}
|
|
|
|
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 (!(mask & (ATTR_CTIME|ATTR_MTIME)))
|
|
goto out_unlock;
|
|
|
|
/*
|
|
* Use the regular setattr path to update the timestamps.
|
|
*/
|
|
xfs_iunlock(ip, lock_flags);
|
|
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)
|
|
goto out_unlock;
|
|
|
|
/*
|
|
* 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)
|
|
goto out_unlock;
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
goto out_unlock;
|
|
}
|
|
|
|
/*
|
|
* Wait for all direct I/O to complete.
|
|
*/
|
|
inode_dio_wait(inode);
|
|
|
|
error = -block_truncate_page(inode->i_mapping, newsize, xfs_get_blocks);
|
|
if (error)
|
|
goto out_unlock;
|
|
|
|
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;
|
|
|
|
truncate_setsize(inode, newsize);
|
|
|
|
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 && (!(mask & (ATTR_CTIME | ATTR_MTIME)))) {
|
|
iattr->ia_ctime = iattr->ia_mtime =
|
|
current_fs_time(inode->i_sb);
|
|
mask |= 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);
|
|
}
|
|
|
|
/*
|
|
* Change file access modes.
|
|
*/
|
|
if (mask & ATTR_MODE)
|
|
xfs_setattr_mode(tp, ip, iattr);
|
|
|
|
if (mask & 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 (mask & 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;
|
|
}
|
|
|
|
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)
|
|
{
|
|
if (iattr->ia_valid & ATTR_SIZE)
|
|
return -xfs_setattr_size(XFS_I(dentry->d_inode), iattr, 0);
|
|
return -xfs_setattr_nonsize(XFS_I(dentry->d_inode), iattr, 0);
|
|
}
|
|
|
|
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 = BTOBB(start);
|
|
/* Special case for whole file */
|
|
if (length == FIEMAP_MAX_OFFSET)
|
|
bm.bmv_length = -1LL;
|
|
else
|
|
bm.bmv_length = BTOBB(length);
|
|
|
|
/* 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 const struct inode_operations xfs_inode_operations = {
|
|
.get_acl = xfs_get_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,
|
|
.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 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,
|
|
.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 const struct inode_operations xfs_symlink_inode_operations = {
|
|
.readlink = generic_readlink,
|
|
.follow_link = xfs_vn_follow_link,
|
|
.put_link = xfs_vn_put_link,
|
|
.get_acl = xfs_get_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,
|
|
};
|
|
|
|
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;
|
|
|
|
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 = ip->i_d.di_uid;
|
|
inode->i_gid = 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);
|
|
|
|
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:
|
|
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;
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
}
|