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e9d2b35bb9
mirror_ubuntu-kernels/fs/xfs/libxfs/xfs_inode_util.c
Darrick J. Wong e9d2b35bb9 xfs: hoist new inode initialization functions to libxfs 
Move all the code that initializes a new inode's attributes from the
icreate_args structure and the parent directory into libxfs.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2024-07-02 11:36:57 -07:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000-2006 Silicon Graphics, Inc.
* All Rights Reserved.
*/
#include <linux/iversion.h>
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_sb.h"
#include "xfs_mount.h"
#include "xfs_inode.h"
#include "xfs_inode_util.h"
#include "xfs_trans.h"
#include "xfs_ialloc.h"
#include "xfs_health.h"
#include "xfs_bmap.h"
uint16_t
xfs_flags2diflags(
struct xfs_inode *ip,
unsigned int xflags)
{
/* can't set PREALLOC this way, just preserve it */
uint16_t di_flags =
(ip->i_diflags & XFS_DIFLAG_PREALLOC);
if (xflags & FS_XFLAG_IMMUTABLE)
di_flags |= XFS_DIFLAG_IMMUTABLE;
if (xflags & FS_XFLAG_APPEND)
di_flags |= XFS_DIFLAG_APPEND;
if (xflags & FS_XFLAG_SYNC)
di_flags |= XFS_DIFLAG_SYNC;
if (xflags & FS_XFLAG_NOATIME)
di_flags |= XFS_DIFLAG_NOATIME;
if (xflags & FS_XFLAG_NODUMP)
di_flags |= XFS_DIFLAG_NODUMP;
if (xflags & FS_XFLAG_NODEFRAG)
di_flags |= XFS_DIFLAG_NODEFRAG;
if (xflags & FS_XFLAG_FILESTREAM)
di_flags |= XFS_DIFLAG_FILESTREAM;
if (S_ISDIR(VFS_I(ip)->i_mode)) {
if (xflags & FS_XFLAG_RTINHERIT)
di_flags |= XFS_DIFLAG_RTINHERIT;
if (xflags & FS_XFLAG_NOSYMLINKS)
di_flags |= XFS_DIFLAG_NOSYMLINKS;
if (xflags & FS_XFLAG_EXTSZINHERIT)
di_flags |= XFS_DIFLAG_EXTSZINHERIT;
if (xflags & FS_XFLAG_PROJINHERIT)
di_flags |= XFS_DIFLAG_PROJINHERIT;
} else if (S_ISREG(VFS_I(ip)->i_mode)) {
if (xflags & FS_XFLAG_REALTIME)
di_flags |= XFS_DIFLAG_REALTIME;
if (xflags & FS_XFLAG_EXTSIZE)
di_flags |= XFS_DIFLAG_EXTSIZE;
}
return di_flags;
}
uint64_t
xfs_flags2diflags2(
struct xfs_inode *ip,
unsigned int xflags)
{
uint64_t di_flags2 =
(ip->i_diflags2 & (XFS_DIFLAG2_REFLINK |
XFS_DIFLAG2_BIGTIME |
XFS_DIFLAG2_NREXT64));
if (xflags & FS_XFLAG_DAX)
di_flags2 |= XFS_DIFLAG2_DAX;
if (xflags & FS_XFLAG_COWEXTSIZE)
di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
return di_flags2;
}
uint32_t
xfs_ip2xflags(
struct xfs_inode *ip)
{
uint32_t flags = 0;
if (ip->i_diflags & XFS_DIFLAG_ANY) {
if (ip->i_diflags & XFS_DIFLAG_REALTIME)
flags |= FS_XFLAG_REALTIME;
if (ip->i_diflags & XFS_DIFLAG_PREALLOC)
flags |= FS_XFLAG_PREALLOC;
if (ip->i_diflags & XFS_DIFLAG_IMMUTABLE)
flags |= FS_XFLAG_IMMUTABLE;
if (ip->i_diflags & XFS_DIFLAG_APPEND)
flags |= FS_XFLAG_APPEND;
if (ip->i_diflags & XFS_DIFLAG_SYNC)
flags |= FS_XFLAG_SYNC;
if (ip->i_diflags & XFS_DIFLAG_NOATIME)
flags |= FS_XFLAG_NOATIME;
if (ip->i_diflags & XFS_DIFLAG_NODUMP)
flags |= FS_XFLAG_NODUMP;
if (ip->i_diflags & XFS_DIFLAG_RTINHERIT)
flags |= FS_XFLAG_RTINHERIT;
if (ip->i_diflags & XFS_DIFLAG_PROJINHERIT)
flags |= FS_XFLAG_PROJINHERIT;
if (ip->i_diflags & XFS_DIFLAG_NOSYMLINKS)
flags |= FS_XFLAG_NOSYMLINKS;
if (ip->i_diflags & XFS_DIFLAG_EXTSIZE)
flags |= FS_XFLAG_EXTSIZE;
if (ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT)
flags |= FS_XFLAG_EXTSZINHERIT;
if (ip->i_diflags & XFS_DIFLAG_NODEFRAG)
flags |= FS_XFLAG_NODEFRAG;
if (ip->i_diflags & XFS_DIFLAG_FILESTREAM)
flags |= FS_XFLAG_FILESTREAM;
}
if (ip->i_diflags2 & XFS_DIFLAG2_ANY) {
if (ip->i_diflags2 & XFS_DIFLAG2_DAX)
flags |= FS_XFLAG_DAX;
if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
flags |= FS_XFLAG_COWEXTSIZE;
}
if (xfs_inode_has_attr_fork(ip))
flags |= FS_XFLAG_HASATTR;
return flags;
}
prid_t
xfs_get_initial_prid(struct xfs_inode *dp)
{
if (dp->i_diflags & XFS_DIFLAG_PROJINHERIT)
return dp->i_projid;
/* Assign to the root project by default. */
return 0;
}
/* Propagate di_flags from a parent inode to a child inode. */
static inline void
xfs_inode_inherit_flags(
struct xfs_inode *ip,
const struct xfs_inode *pip)
{
unsigned int di_flags = 0;
xfs_failaddr_t failaddr;
umode_t mode = VFS_I(ip)->i_mode;
if (S_ISDIR(mode)) {
if (pip->i_diflags & XFS_DIFLAG_RTINHERIT)
di_flags |= XFS_DIFLAG_RTINHERIT;
if (pip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) {
di_flags |= XFS_DIFLAG_EXTSZINHERIT;
ip->i_extsize = pip->i_extsize;
}
if (pip->i_diflags & XFS_DIFLAG_PROJINHERIT)
di_flags |= XFS_DIFLAG_PROJINHERIT;
} else if (S_ISREG(mode)) {
if ((pip->i_diflags & XFS_DIFLAG_RTINHERIT) &&
xfs_has_realtime(ip->i_mount))
di_flags |= XFS_DIFLAG_REALTIME;
if (pip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) {
di_flags |= XFS_DIFLAG_EXTSIZE;
ip->i_extsize = pip->i_extsize;
}
}
if ((pip->i_diflags & XFS_DIFLAG_NOATIME) &&
xfs_inherit_noatime)
di_flags |= XFS_DIFLAG_NOATIME;
if ((pip->i_diflags & XFS_DIFLAG_NODUMP) &&
xfs_inherit_nodump)
di_flags |= XFS_DIFLAG_NODUMP;
if ((pip->i_diflags & XFS_DIFLAG_SYNC) &&
xfs_inherit_sync)
di_flags |= XFS_DIFLAG_SYNC;
if ((pip->i_diflags & XFS_DIFLAG_NOSYMLINKS) &&
xfs_inherit_nosymlinks)
di_flags |= XFS_DIFLAG_NOSYMLINKS;
if ((pip->i_diflags & XFS_DIFLAG_NODEFRAG) &&
xfs_inherit_nodefrag)
di_flags |= XFS_DIFLAG_NODEFRAG;
if (pip->i_diflags & XFS_DIFLAG_FILESTREAM)
di_flags |= XFS_DIFLAG_FILESTREAM;
ip->i_diflags |= di_flags;
/*
* Inode verifiers on older kernels only check that the extent size
* hint is an integer multiple of the rt extent size on realtime files.
* They did not check the hint alignment on a directory with both
* rtinherit and extszinherit flags set. If the misaligned hint is
* propagated from a directory into a new realtime file, new file
* allocations will fail due to math errors in the rt allocator and/or
* trip the verifiers. Validate the hint settings in the new file so
* that we don't let broken hints propagate.
*/
failaddr = xfs_inode_validate_extsize(ip->i_mount, ip->i_extsize,
VFS_I(ip)->i_mode, ip->i_diflags);
if (failaddr) {
ip->i_diflags &= ~(XFS_DIFLAG_EXTSIZE |
XFS_DIFLAG_EXTSZINHERIT);
ip->i_extsize = 0;
}
}
/* Propagate di_flags2 from a parent inode to a child inode. */
static inline void
xfs_inode_inherit_flags2(
struct xfs_inode *ip,
const struct xfs_inode *pip)
{
xfs_failaddr_t failaddr;
if (pip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE) {
ip->i_diflags2 |= XFS_DIFLAG2_COWEXTSIZE;
ip->i_cowextsize = pip->i_cowextsize;
}
if (pip->i_diflags2 & XFS_DIFLAG2_DAX)
ip->i_diflags2 |= XFS_DIFLAG2_DAX;
/* Don't let invalid cowextsize hints propagate. */
failaddr = xfs_inode_validate_cowextsize(ip->i_mount, ip->i_cowextsize,
VFS_I(ip)->i_mode, ip->i_diflags, ip->i_diflags2);
if (failaddr) {
ip->i_diflags2 &= ~XFS_DIFLAG2_COWEXTSIZE;
ip->i_cowextsize = 0;
}
}
/* Initialise an inode's attributes. */
void
xfs_inode_init(
struct xfs_trans *tp,
const struct xfs_icreate_args *args,
struct xfs_inode *ip)
{
struct xfs_inode *pip = args->pip;
struct inode *dir = pip ? VFS_I(pip) : NULL;
struct xfs_mount *mp = tp->t_mountp;
struct inode *inode = VFS_I(ip);
unsigned int flags;
int times = XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG |
XFS_ICHGTIME_ACCESS;
if (args->flags & XFS_ICREATE_TMPFILE)
set_nlink(inode, 0);
else if (S_ISDIR(args->mode))
set_nlink(inode, 2);
else
set_nlink(inode, 1);
inode->i_rdev = args->rdev;
if (!args->idmap || pip == NULL) {
/* creating a tree root, sb rooted, or detached file */
inode->i_uid = GLOBAL_ROOT_UID;
inode->i_gid = GLOBAL_ROOT_GID;
ip->i_projid = 0;
inode->i_mode = args->mode;
} else {
/* creating a child in the directory tree */
if (dir && !(dir->i_mode & S_ISGID) && xfs_has_grpid(mp)) {
inode_fsuid_set(inode, args->idmap);
inode->i_gid = dir->i_gid;
inode->i_mode = args->mode;
} else {
inode_init_owner(args->idmap, inode, dir, args->mode);
}
/*
* If the group ID of the new file does not match the effective
* group ID or one of the supplementary group IDs, the S_ISGID
* bit is cleared (and only if the irix_sgid_inherit
* compatibility variable is set).
*/
if (irix_sgid_inherit && (inode->i_mode & S_ISGID) &&
!vfsgid_in_group_p(i_gid_into_vfsgid(args->idmap, inode)))
inode->i_mode &= ~S_ISGID;
ip->i_projid = pip ? xfs_get_initial_prid(pip) : 0;
}
ip->i_disk_size = 0;
ip->i_df.if_nextents = 0;
ASSERT(ip->i_nblocks == 0);
ip->i_extsize = 0;
ip->i_diflags = 0;
if (xfs_has_v3inodes(mp)) {
inode_set_iversion(inode, 1);
ip->i_cowextsize = 0;
times |= XFS_ICHGTIME_CREATE;
}
xfs_trans_ichgtime(tp, ip, times);
flags = XFS_ILOG_CORE;
switch (args->mode & S_IFMT) {
case S_IFIFO:
case S_IFCHR:
case S_IFBLK:
case S_IFSOCK:
ip->i_df.if_format = XFS_DINODE_FMT_DEV;
flags |= XFS_ILOG_DEV;
break;
case S_IFREG:
case S_IFDIR:
if (pip && (pip->i_diflags & XFS_DIFLAG_ANY))
xfs_inode_inherit_flags(ip, pip);
if (pip && (pip->i_diflags2 & XFS_DIFLAG2_ANY))
xfs_inode_inherit_flags2(ip, pip);
fallthrough;
case S_IFLNK:
ip->i_df.if_format = XFS_DINODE_FMT_EXTENTS;
ip->i_df.if_bytes = 0;
ip->i_df.if_data = NULL;
break;
default:
ASSERT(0);
}
/*
* If we need to create attributes immediately after allocating the
* inode, initialise an empty attribute fork right now. We use the
* default fork offset for attributes here as we don't know exactly what
* size or how many attributes we might be adding. We can do this
* safely here because we know the data fork is completely empty and
* this saves us from needing to run a separate transaction to set the
* fork offset in the immediate future.
*/
if (args->flags & XFS_ICREATE_INIT_XATTRS) {
ip->i_forkoff = xfs_default_attroffset(ip) >> 3;
xfs_ifork_init_attr(ip, XFS_DINODE_FMT_EXTENTS, 0);
if (!xfs_has_attr(mp)) {
spin_lock(&mp->m_sb_lock);
xfs_add_attr(mp);
spin_unlock(&mp->m_sb_lock);
xfs_log_sb(tp);
}
}
xfs_trans_log_inode(tp, ip, flags);
}
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