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linux/fs/xfs/xfs_ioctl.c
Darrick J. Wong 2ca7b9d7b8 xfs: move xfs_ioc_getfsmap out of xfs_ioctl.c 
Move this function out of xfs_ioctl.c to reduce the clutter in there,
and make the entire getfsmap implementation self-contained in a single
file.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2024-09-01 08:58:19 -07:00

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33 KiB
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000-2005 Silicon Graphics, Inc.
* All Rights Reserved.
*/
#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_mount.h"
#include "xfs_inode.h"
#include "xfs_rtalloc.h"
#include "xfs_iwalk.h"
#include "xfs_itable.h"
#include "xfs_error.h"
#include "xfs_da_format.h"
#include "xfs_da_btree.h"
#include "xfs_attr.h"
#include "xfs_bmap.h"
#include "xfs_bmap_util.h"
#include "xfs_fsops.h"
#include "xfs_discard.h"
#include "xfs_quota.h"
#include "xfs_trace.h"
#include "xfs_icache.h"
#include "xfs_trans.h"
#include "xfs_btree.h"
#include <linux/fsmap.h>
#include "xfs_fsmap.h"
#include "scrub/xfs_scrub.h"
#include "xfs_sb.h"
#include "xfs_ag.h"
#include "xfs_health.h"
#include "xfs_reflink.h"
#include "xfs_ioctl.h"
#include "xfs_xattr.h"
#include "xfs_rtbitmap.h"
#include "xfs_file.h"
#include "xfs_exchrange.h"
#include "xfs_handle.h"
#include <linux/mount.h>
#include <linux/fileattr.h>
/* Return 0 on success or positive error */
int
xfs_fsbulkstat_one_fmt(
struct xfs_ibulk *breq,
const struct xfs_bulkstat *bstat)
{
struct xfs_bstat bs1;
xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1)))
return -EFAULT;
return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat));
}
int
xfs_fsinumbers_fmt(
struct xfs_ibulk *breq,
const struct xfs_inumbers *igrp)
{
struct xfs_inogrp ig1;
xfs_inumbers_to_inogrp(&ig1, igrp);
if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp)))
return -EFAULT;
return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp));
}
STATIC int
xfs_ioc_fsbulkstat(
struct file *file,
unsigned int cmd,
void __user *arg)
{
struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
struct xfs_fsop_bulkreq bulkreq;
struct xfs_ibulk breq = {
.mp = mp,
.idmap = file_mnt_idmap(file),
.ocount = 0,
};
xfs_ino_t lastino;
int error;
/* done = 1 if there are more stats to get and if bulkstat */
/* should be called again (unused here, but used in dmapi) */
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (xfs_is_shutdown(mp))
return -EIO;
if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq)))
return -EFAULT;
if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64)))
return -EFAULT;
if (bulkreq.icount <= 0)
return -EINVAL;
if (bulkreq.ubuffer == NULL)
return -EINVAL;
breq.ubuffer = bulkreq.ubuffer;
breq.icount = bulkreq.icount;
/*
* FSBULKSTAT_SINGLE expects that *lastip contains the inode number
* that we want to stat. However, FSINUMBERS and FSBULKSTAT expect
* that *lastip contains either zero or the number of the last inode to
* be examined by the previous call and return results starting with
* the next inode after that. The new bulk request back end functions
* take the inode to start with, so we have to compute the startino
* parameter from lastino to maintain correct function. lastino == 0
* is a special case because it has traditionally meant "first inode
* in filesystem".
*/
if (cmd == XFS_IOC_FSINUMBERS) {
breq.startino = lastino ? lastino + 1 : 0;
error = xfs_inumbers(&breq, xfs_fsinumbers_fmt);
lastino = breq.startino - 1;
} else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) {
breq.startino = lastino;
breq.icount = 1;
error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt);
} else { /* XFS_IOC_FSBULKSTAT */
breq.startino = lastino ? lastino + 1 : 0;
error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt);
lastino = breq.startino - 1;
}
if (error)
return error;
if (bulkreq.lastip != NULL &&
copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t)))
return -EFAULT;
if (bulkreq.ocount != NULL &&
copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32)))
return -EFAULT;
return 0;
}
/* Return 0 on success or positive error */
static int
xfs_bulkstat_fmt(
struct xfs_ibulk *breq,
const struct xfs_bulkstat *bstat)
{
if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat)))
return -EFAULT;
return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat));
}
/*
* Check the incoming bulk request @hdr from userspace and initialize the
* internal @breq bulk request appropriately. Returns 0 if the bulk request
* should proceed; -ECANCELED if there's nothing to do; or the usual
* negative error code.
*/
static int
xfs_bulk_ireq_setup(
struct xfs_mount *mp,
const struct xfs_bulk_ireq *hdr,
struct xfs_ibulk *breq,
void __user *ubuffer)
{
if (hdr->icount == 0 ||
(hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) ||
memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved)))
return -EINVAL;
breq->startino = hdr->ino;
breq->ubuffer = ubuffer;
breq->icount = hdr->icount;
breq->ocount = 0;
breq->flags = 0;
/*
* The @ino parameter is a special value, so we must look it up here.
* We're not allowed to have IREQ_AGNO, and we only return one inode
* worth of data.
*/
if (hdr->flags & XFS_BULK_IREQ_SPECIAL) {
if (hdr->flags & XFS_BULK_IREQ_AGNO)
return -EINVAL;
switch (hdr->ino) {
case XFS_BULK_IREQ_SPECIAL_ROOT:
breq->startino = mp->m_sb.sb_rootino;
break;
default:
return -EINVAL;
}
breq->icount = 1;
}
/*
* The IREQ_AGNO flag means that we only want results from a given AG.
* If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is
* beyond the specified AG then we return no results.
*/
if (hdr->flags & XFS_BULK_IREQ_AGNO) {
if (hdr->agno >= mp->m_sb.sb_agcount)
return -EINVAL;
if (breq->startino == 0)
breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0);
else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno)
return -EINVAL;
breq->flags |= XFS_IBULK_SAME_AG;
/* Asking for an inode past the end of the AG? We're done! */
if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno)
return -ECANCELED;
} else if (hdr->agno)
return -EINVAL;
/* Asking for an inode past the end of the FS? We're done! */
if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount)
return -ECANCELED;
if (hdr->flags & XFS_BULK_IREQ_NREXT64)
breq->flags |= XFS_IBULK_NREXT64;
return 0;
}
/*
* Update the userspace bulk request @hdr to reflect the end state of the
* internal bulk request @breq.
*/
static void
xfs_bulk_ireq_teardown(
struct xfs_bulk_ireq *hdr,
struct xfs_ibulk *breq)
{
hdr->ino = breq->startino;
hdr->ocount = breq->ocount;
}
/* Handle the v5 bulkstat ioctl. */
STATIC int
xfs_ioc_bulkstat(
struct file *file,
unsigned int cmd,
struct xfs_bulkstat_req __user *arg)
{
struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
struct xfs_bulk_ireq hdr;
struct xfs_ibulk breq = {
.mp = mp,
.idmap = file_mnt_idmap(file),
};
int error;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (xfs_is_shutdown(mp))
return -EIO;
if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
return -EFAULT;
error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat);
if (error == -ECANCELED)
goto out_teardown;
if (error < 0)
return error;
error = xfs_bulkstat(&breq, xfs_bulkstat_fmt);
if (error)
return error;
out_teardown:
xfs_bulk_ireq_teardown(&hdr, &breq);
if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
return -EFAULT;
return 0;
}
STATIC int
xfs_inumbers_fmt(
struct xfs_ibulk *breq,
const struct xfs_inumbers *igrp)
{
if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers)))
return -EFAULT;
return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers));
}
/* Handle the v5 inumbers ioctl. */
STATIC int
xfs_ioc_inumbers(
struct xfs_mount *mp,
unsigned int cmd,
struct xfs_inumbers_req __user *arg)
{
struct xfs_bulk_ireq hdr;
struct xfs_ibulk breq = {
.mp = mp,
};
int error;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (xfs_is_shutdown(mp))
return -EIO;
if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
return -EFAULT;
error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers);
if (error == -ECANCELED)
goto out_teardown;
if (error < 0)
return error;
error = xfs_inumbers(&breq, xfs_inumbers_fmt);
if (error)
return error;
out_teardown:
xfs_bulk_ireq_teardown(&hdr, &breq);
if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
return -EFAULT;
return 0;
}
STATIC int
xfs_ioc_fsgeometry(
struct xfs_mount *mp,
void __user *arg,
int struct_version)
{
struct xfs_fsop_geom fsgeo;
size_t len;
xfs_fs_geometry(mp, &fsgeo, struct_version);
if (struct_version <= 3)
len = sizeof(struct xfs_fsop_geom_v1);
else if (struct_version == 4)
len = sizeof(struct xfs_fsop_geom_v4);
else {
xfs_fsop_geom_health(mp, &fsgeo);
len = sizeof(fsgeo);
}
if (copy_to_user(arg, &fsgeo, len))
return -EFAULT;
return 0;
}
STATIC int
xfs_ioc_ag_geometry(
struct xfs_mount *mp,
void __user *arg)
{
struct xfs_perag *pag;
struct xfs_ag_geometry ageo;
int error;
if (copy_from_user(&ageo, arg, sizeof(ageo)))
return -EFAULT;
if (ageo.ag_flags)
return -EINVAL;
if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved)))
return -EINVAL;
pag = xfs_perag_get(mp, ageo.ag_number);
if (!pag)
return -EINVAL;
error = xfs_ag_get_geometry(pag, &ageo);
xfs_perag_put(pag);
if (error)
return error;
if (copy_to_user(arg, &ageo, sizeof(ageo)))
return -EFAULT;
return 0;
}
/*
* Linux extended inode flags interface.
*/
static void
xfs_fill_fsxattr(
struct xfs_inode *ip,
int whichfork,
struct fileattr *fa)
{
struct xfs_mount *mp = ip->i_mount;
struct xfs_ifork *ifp = xfs_ifork_ptr(ip, whichfork);
fileattr_fill_xflags(fa, xfs_ip2xflags(ip));
if (ip->i_diflags & XFS_DIFLAG_EXTSIZE) {
fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
} else if (ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) {
/*
* Don't let a misaligned extent size hint on a directory
* escape to userspace if it won't pass the setattr checks
* later.
*/
if ((ip->i_diflags & XFS_DIFLAG_RTINHERIT) &&
xfs_extlen_to_rtxmod(mp, ip->i_extsize) > 0) {
fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE |
FS_XFLAG_EXTSZINHERIT);
fa->fsx_extsize = 0;
} else {
fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
}
}
if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
fa->fsx_cowextsize = XFS_FSB_TO_B(mp, ip->i_cowextsize);
fa->fsx_projid = ip->i_projid;
if (ifp && !xfs_need_iread_extents(ifp))
fa->fsx_nextents = xfs_iext_count(ifp);
else
fa->fsx_nextents = xfs_ifork_nextents(ifp);
}
STATIC int
xfs_ioc_fsgetxattra(
xfs_inode_t *ip,
void __user *arg)
{
struct fileattr fa;
xfs_ilock(ip, XFS_ILOCK_SHARED);
xfs_fill_fsxattr(ip, XFS_ATTR_FORK, &fa);
xfs_iunlock(ip, XFS_ILOCK_SHARED);
return copy_fsxattr_to_user(&fa, arg);
}
int
xfs_fileattr_get(
struct dentry *dentry,
struct fileattr *fa)
{
struct xfs_inode *ip = XFS_I(d_inode(dentry));
if (d_is_special(dentry))
return -ENOTTY;
xfs_ilock(ip, XFS_ILOCK_SHARED);
xfs_fill_fsxattr(ip, XFS_DATA_FORK, fa);
xfs_iunlock(ip, XFS_ILOCK_SHARED);
return 0;
}
static int
xfs_ioctl_setattr_xflags(
struct xfs_trans *tp,
struct xfs_inode *ip,
struct fileattr *fa)
{
struct xfs_mount *mp = ip->i_mount;
bool rtflag = (fa->fsx_xflags & FS_XFLAG_REALTIME);
uint64_t i_flags2;
if (rtflag != XFS_IS_REALTIME_INODE(ip)) {
/* Can't change realtime flag if any extents are allocated. */
if (ip->i_df.if_nextents || ip->i_delayed_blks)
return -EINVAL;
/*
* If S_DAX is enabled on this file, we can only switch the
* device if both support fsdax. We can't update S_DAX because
* there might be other threads walking down the access paths.
*/
if (IS_DAX(VFS_I(ip)) &&
(mp->m_ddev_targp->bt_daxdev == NULL ||
(mp->m_rtdev_targp &&
mp->m_rtdev_targp->bt_daxdev == NULL)))
return -EINVAL;
}
if (rtflag) {
/* If realtime flag is set then must have realtime device */
if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
xfs_extlen_to_rtxmod(mp, ip->i_extsize))
return -EINVAL;
/* Clear reflink if we are actually able to set the rt flag. */
if (xfs_is_reflink_inode(ip))
ip->i_diflags2 &= ~XFS_DIFLAG2_REFLINK;
}
/* diflags2 only valid for v3 inodes. */
i_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
if (i_flags2 && !xfs_has_v3inodes(mp))
return -EINVAL;
ip->i_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
ip->i_diflags2 = i_flags2;
xfs_diflags_to_iflags(ip, false);
/*
* Make the stable writes flag match that of the device the inode
* resides on when flipping the RT flag.
*/
if (rtflag != XFS_IS_REALTIME_INODE(ip) && S_ISREG(VFS_I(ip)->i_mode))
xfs_update_stable_writes(ip);
xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
XFS_STATS_INC(mp, xs_ig_attrchg);
return 0;
}
static void
xfs_ioctl_setattr_prepare_dax(
struct xfs_inode *ip,
struct fileattr *fa)
{
struct xfs_mount *mp = ip->i_mount;
struct inode *inode = VFS_I(ip);
if (S_ISDIR(inode->i_mode))
return;
if (xfs_has_dax_always(mp) || xfs_has_dax_never(mp))
return;
if (((fa->fsx_xflags & FS_XFLAG_DAX) &&
!(ip->i_diflags2 & XFS_DIFLAG2_DAX)) ||
(!(fa->fsx_xflags & FS_XFLAG_DAX) &&
(ip->i_diflags2 & XFS_DIFLAG2_DAX)))
d_mark_dontcache(inode);
}
/*
* Set up the transaction structure for the setattr operation, checking that we
* have permission to do so. On success, return a clean transaction and the
* inode locked exclusively ready for further operation specific checks. On
* failure, return an error without modifying or locking the inode.
*/
static struct xfs_trans *
xfs_ioctl_setattr_get_trans(
struct xfs_inode *ip,
struct xfs_dquot *pdqp)
{
struct xfs_mount *mp = ip->i_mount;
struct xfs_trans *tp;
int error = -EROFS;
if (xfs_is_readonly(mp))
goto out_error;
error = -EIO;
if (xfs_is_shutdown(mp))
goto out_error;
error = xfs_trans_alloc_ichange(ip, NULL, NULL, pdqp,
has_capability_noaudit(current, CAP_FOWNER), &tp);
if (error)
goto out_error;
if (xfs_has_wsync(mp))
xfs_trans_set_sync(tp);
return tp;
out_error:
return ERR_PTR(error);
}
/*
* Validate a proposed extent size hint. For regular files, the hint can only
* be changed if no extents are allocated.
*/
static int
xfs_ioctl_setattr_check_extsize(
struct xfs_inode *ip,
struct fileattr *fa)
{
struct xfs_mount *mp = ip->i_mount;
xfs_failaddr_t failaddr;
uint16_t new_diflags;
if (!fa->fsx_valid)
return 0;
if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents &&
XFS_FSB_TO_B(mp, ip->i_extsize) != fa->fsx_extsize)
return -EINVAL;
if (fa->fsx_extsize & mp->m_blockmask)
return -EINVAL;
new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
/*
* Inode verifiers do not check that the extent size hint is an integer
* multiple of the rt extent size on a directory with both rtinherit
* and extszinherit flags set. Don't let sysadmins misconfigure
* directories.
*/
if ((new_diflags & XFS_DIFLAG_RTINHERIT) &&
(new_diflags & XFS_DIFLAG_EXTSZINHERIT)) {
unsigned int rtextsize_bytes;
rtextsize_bytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize);
if (fa->fsx_extsize % rtextsize_bytes)
return -EINVAL;
}
failaddr = xfs_inode_validate_extsize(ip->i_mount,
XFS_B_TO_FSB(mp, fa->fsx_extsize),
VFS_I(ip)->i_mode, new_diflags);
return failaddr != NULL ? -EINVAL : 0;
}
static int
xfs_ioctl_setattr_check_cowextsize(
struct xfs_inode *ip,
struct fileattr *fa)
{
struct xfs_mount *mp = ip->i_mount;
xfs_failaddr_t failaddr;
uint64_t new_diflags2;
uint16_t new_diflags;
if (!fa->fsx_valid)
return 0;
if (fa->fsx_cowextsize & mp->m_blockmask)
return -EINVAL;
new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
new_diflags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
failaddr = xfs_inode_validate_cowextsize(ip->i_mount,
XFS_B_TO_FSB(mp, fa->fsx_cowextsize),
VFS_I(ip)->i_mode, new_diflags, new_diflags2);
return failaddr != NULL ? -EINVAL : 0;
}
static int
xfs_ioctl_setattr_check_projid(
struct xfs_inode *ip,
struct fileattr *fa)
{
if (!fa->fsx_valid)
return 0;
/* Disallow 32bit project ids if 32bit IDs are not enabled. */
if (fa->fsx_projid > (uint16_t)-1 &&
!xfs_has_projid32(ip->i_mount))
return -EINVAL;
return 0;
}
int
xfs_fileattr_set(
struct mnt_idmap *idmap,
struct dentry *dentry,
struct fileattr *fa)
{
struct xfs_inode *ip = XFS_I(d_inode(dentry));
struct xfs_mount *mp = ip->i_mount;
struct xfs_trans *tp;
struct xfs_dquot *pdqp = NULL;
struct xfs_dquot *olddquot = NULL;
int error;
trace_xfs_ioctl_setattr(ip);
if (d_is_special(dentry))
return -ENOTTY;
if (!fa->fsx_valid) {
if (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL |
FS_NOATIME_FL | FS_NODUMP_FL |
FS_SYNC_FL | FS_DAX_FL | FS_PROJINHERIT_FL))
return -EOPNOTSUPP;
}
error = xfs_ioctl_setattr_check_projid(ip, fa);
if (error)
return error;
/*
* 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 (fa->fsx_valid && XFS_IS_QUOTA_ON(mp)) {
error = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid,
VFS_I(ip)->i_gid, fa->fsx_projid,
XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp);
if (error)
return error;
}
xfs_ioctl_setattr_prepare_dax(ip, fa);
tp = xfs_ioctl_setattr_get_trans(ip, pdqp);
if (IS_ERR(tp)) {
error = PTR_ERR(tp);
goto error_free_dquots;
}
error = xfs_ioctl_setattr_check_extsize(ip, fa);
if (error)
goto error_trans_cancel;
error = xfs_ioctl_setattr_check_cowextsize(ip, fa);
if (error)
goto error_trans_cancel;
error = xfs_ioctl_setattr_xflags(tp, ip, fa);
if (error)
goto error_trans_cancel;
if (!fa->fsx_valid)
goto skip_xattr;
/*
* Change file ownership. Must be the owner or privileged. 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 ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
!capable_wrt_inode_uidgid(idmap, VFS_I(ip), CAP_FSETID))
VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
/* Change the ownerships and register project quota modifications */
if (ip->i_projid != fa->fsx_projid) {
if (XFS_IS_PQUOTA_ON(mp)) {
olddquot = xfs_qm_vop_chown(tp, ip,
&ip->i_pdquot, pdqp);
}
ip->i_projid = fa->fsx_projid;
}
/*
* Only set the extent size hint if we've already determined that the
* extent size hint should be set on the inode. If no extent size flags
* are set on the inode then unconditionally clear the extent size hint.
*/
if (ip->i_diflags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
ip->i_extsize = XFS_B_TO_FSB(mp, fa->fsx_extsize);
else
ip->i_extsize = 0;
if (xfs_has_v3inodes(mp)) {
if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
ip->i_cowextsize = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
else
ip->i_cowextsize = 0;
}
skip_xattr:
error = xfs_trans_commit(tp);
/*
* Release any dquot(s) the inode had kept before chown.
*/
xfs_qm_dqrele(olddquot);
xfs_qm_dqrele(pdqp);
return error;
error_trans_cancel:
xfs_trans_cancel(tp);
error_free_dquots:
xfs_qm_dqrele(pdqp);
return error;
}
static bool
xfs_getbmap_format(
struct kgetbmap *p,
struct getbmapx __user *u,
size_t recsize)
{
if (put_user(p->bmv_offset, &u->bmv_offset) ||
put_user(p->bmv_block, &u->bmv_block) ||
put_user(p->bmv_length, &u->bmv_length) ||
put_user(0, &u->bmv_count) ||
put_user(0, &u->bmv_entries))
return false;
if (recsize < sizeof(struct getbmapx))
return true;
if (put_user(0, &u->bmv_iflags) ||
put_user(p->bmv_oflags, &u->bmv_oflags) ||
put_user(0, &u->bmv_unused1) ||
put_user(0, &u->bmv_unused2))
return false;
return true;
}
STATIC int
xfs_ioc_getbmap(
struct file *file,
unsigned int cmd,
void __user *arg)
{
struct getbmapx bmx = { 0 };
struct kgetbmap *buf;
size_t recsize;
int error, i;
switch (cmd) {
case XFS_IOC_GETBMAPA:
bmx.bmv_iflags = BMV_IF_ATTRFORK;
fallthrough;
case XFS_IOC_GETBMAP:
/* struct getbmap is a strict subset of struct getbmapx. */
recsize = sizeof(struct getbmap);
break;
case XFS_IOC_GETBMAPX:
recsize = sizeof(struct getbmapx);
break;
default:
return -EINVAL;
}
if (copy_from_user(&bmx, arg, recsize))
return -EFAULT;
if (bmx.bmv_count < 2)
return -EINVAL;
if (bmx.bmv_count >= INT_MAX / recsize)
return -ENOMEM;
buf = kvcalloc(bmx.bmv_count, sizeof(*buf), GFP_KERNEL);
if (!buf)
return -ENOMEM;
error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
if (error)
goto out_free_buf;
error = -EFAULT;
if (copy_to_user(arg, &bmx, recsize))
goto out_free_buf;
arg += recsize;
for (i = 0; i < bmx.bmv_entries; i++) {
if (!xfs_getbmap_format(buf + i, arg, recsize))
goto out_free_buf;
arg += recsize;
}
error = 0;
out_free_buf:
kvfree(buf);
return error;
}
int
xfs_ioc_swapext(
xfs_swapext_t *sxp)
{
xfs_inode_t *ip, *tip;
struct fd f, tmp;
int error = 0;
/* Pull information for the target fd */
f = fdget((int)sxp->sx_fdtarget);
if (!f.file) {
error = -EINVAL;
goto out;
}
if (!(f.file->f_mode & FMODE_WRITE) ||
!(f.file->f_mode & FMODE_READ) ||
(f.file->f_flags & O_APPEND)) {
error = -EBADF;
goto out_put_file;
}
tmp = fdget((int)sxp->sx_fdtmp);
if (!tmp.file) {
error = -EINVAL;
goto out_put_file;
}
if (!(tmp.file->f_mode & FMODE_WRITE) ||
!(tmp.file->f_mode & FMODE_READ) ||
(tmp.file->f_flags & O_APPEND)) {
error = -EBADF;
goto out_put_tmp_file;
}
if (IS_SWAPFILE(file_inode(f.file)) ||
IS_SWAPFILE(file_inode(tmp.file))) {
error = -EINVAL;
goto out_put_tmp_file;
}
/*
* We need to ensure that the fds passed in point to XFS inodes
* before we cast and access them as XFS structures as we have no
* control over what the user passes us here.
*/
if (f.file->f_op != &xfs_file_operations ||
tmp.file->f_op != &xfs_file_operations) {
error = -EINVAL;
goto out_put_tmp_file;
}
ip = XFS_I(file_inode(f.file));
tip = XFS_I(file_inode(tmp.file));
if (ip->i_mount != tip->i_mount) {
error = -EINVAL;
goto out_put_tmp_file;
}
if (ip->i_ino == tip->i_ino) {
error = -EINVAL;
goto out_put_tmp_file;
}
if (xfs_is_shutdown(ip->i_mount)) {
error = -EIO;
goto out_put_tmp_file;
}
error = xfs_swap_extents(ip, tip, sxp);
out_put_tmp_file:
fdput(tmp);
out_put_file:
fdput(f);
out:
return error;
}
static int
xfs_ioc_getlabel(
struct xfs_mount *mp,
char __user *user_label)
{
struct xfs_sb *sbp = &mp->m_sb;
char label[XFSLABEL_MAX + 1];
/* Paranoia */
BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
/* 1 larger than sb_fname, so this ensures a trailing NUL char */
memset(label, 0, sizeof(label));
spin_lock(&mp->m_sb_lock);
strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
spin_unlock(&mp->m_sb_lock);
if (copy_to_user(user_label, label, sizeof(label)))
return -EFAULT;
return 0;
}
static int
xfs_ioc_setlabel(
struct file *filp,
struct xfs_mount *mp,
char __user *newlabel)
{
struct xfs_sb *sbp = &mp->m_sb;
char label[XFSLABEL_MAX + 1];
size_t len;
int error;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
/*
* The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
* smaller, at 12 bytes. We copy one more to be sure we find the
* (required) NULL character to test the incoming label length.
* NB: The on disk label doesn't need to be null terminated.
*/
if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
return -EFAULT;
len = strnlen(label, XFSLABEL_MAX + 1);
if (len > sizeof(sbp->sb_fname))
return -EINVAL;
error = mnt_want_write_file(filp);
if (error)
return error;
spin_lock(&mp->m_sb_lock);
memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
memcpy(sbp->sb_fname, label, len);
spin_unlock(&mp->m_sb_lock);
/*
* Now we do several things to satisfy userspace.
* In addition to normal logging of the primary superblock, we also
* immediately write these changes to sector zero for the primary, then
* update all backup supers (as xfs_db does for a label change), then
* invalidate the block device page cache. This is so that any prior
* buffered reads from userspace (i.e. from blkid) are invalidated,
* and userspace will see the newly-written label.
*/
error = xfs_sync_sb_buf(mp);
if (error)
goto out;
/*
* growfs also updates backup supers so lock against that.
*/
mutex_lock(&mp->m_growlock);
error = xfs_update_secondary_sbs(mp);
mutex_unlock(&mp->m_growlock);
invalidate_bdev(mp->m_ddev_targp->bt_bdev);
out:
mnt_drop_write_file(filp);
return error;
}
static inline int
xfs_fs_eofblocks_from_user(
struct xfs_fs_eofblocks *src,
struct xfs_icwalk *dst)
{
if (src->eof_version != XFS_EOFBLOCKS_VERSION)
return -EINVAL;
if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
return -EINVAL;
if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
memchr_inv(src->pad64, 0, sizeof(src->pad64)))
return -EINVAL;
dst->icw_flags = 0;
if (src->eof_flags & XFS_EOF_FLAGS_SYNC)
dst->icw_flags |= XFS_ICWALK_FLAG_SYNC;
if (src->eof_flags & XFS_EOF_FLAGS_UID)
dst->icw_flags |= XFS_ICWALK_FLAG_UID;
if (src->eof_flags & XFS_EOF_FLAGS_GID)
dst->icw_flags |= XFS_ICWALK_FLAG_GID;
if (src->eof_flags & XFS_EOF_FLAGS_PRID)
dst->icw_flags |= XFS_ICWALK_FLAG_PRID;
if (src->eof_flags & XFS_EOF_FLAGS_MINFILESIZE)
dst->icw_flags |= XFS_ICWALK_FLAG_MINFILESIZE;
dst->icw_prid = src->eof_prid;
dst->icw_min_file_size = src->eof_min_file_size;
dst->icw_uid = INVALID_UID;
if (src->eof_flags & XFS_EOF_FLAGS_UID) {
dst->icw_uid = make_kuid(current_user_ns(), src->eof_uid);
if (!uid_valid(dst->icw_uid))
return -EINVAL;
}
dst->icw_gid = INVALID_GID;
if (src->eof_flags & XFS_EOF_FLAGS_GID) {
dst->icw_gid = make_kgid(current_user_ns(), src->eof_gid);
if (!gid_valid(dst->icw_gid))
return -EINVAL;
}
return 0;
}
static int
xfs_ioctl_getset_resblocks(
struct file *filp,
unsigned int cmd,
void __user *arg)
{
struct xfs_mount *mp = XFS_I(file_inode(filp))->i_mount;
struct xfs_fsop_resblks fsop = { };
int error;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (cmd == XFS_IOC_SET_RESBLKS) {
if (xfs_is_readonly(mp))
return -EROFS;
if (copy_from_user(&fsop, arg, sizeof(fsop)))
return -EFAULT;
error = mnt_want_write_file(filp);
if (error)
return error;
error = xfs_reserve_blocks(mp, fsop.resblks);
mnt_drop_write_file(filp);
if (error)
return error;
}
spin_lock(&mp->m_sb_lock);
fsop.resblks = mp->m_resblks;
fsop.resblks_avail = mp->m_resblks_avail;
spin_unlock(&mp->m_sb_lock);
if (copy_to_user(arg, &fsop, sizeof(fsop)))
return -EFAULT;
return 0;
}
static int
xfs_ioctl_fs_counts(
struct xfs_mount *mp,
struct xfs_fsop_counts __user *uarg)
{
struct xfs_fsop_counts out = {
.allocino = percpu_counter_read_positive(&mp->m_icount),
.freeino = percpu_counter_read_positive(&mp->m_ifree),
.freedata = percpu_counter_read_positive(&mp->m_fdblocks) -
xfs_fdblocks_unavailable(mp),
.freertx = percpu_counter_read_positive(&mp->m_frextents),
};
if (copy_to_user(uarg, &out, sizeof(out)))
return -EFAULT;
return 0;
}
/*
* These long-unused ioctls were removed from the official ioctl API in 5.17,
* but retain these definitions so that we can log warnings about them.
*/
#define XFS_IOC_ALLOCSP _IOW ('X', 10, struct xfs_flock64)
#define XFS_IOC_FREESP _IOW ('X', 11, struct xfs_flock64)
#define XFS_IOC_ALLOCSP64 _IOW ('X', 36, struct xfs_flock64)
#define XFS_IOC_FREESP64 _IOW ('X', 37, struct xfs_flock64)
/*
* Note: some of the ioctl's return positive numbers as a
* byte count indicating success, such as readlink_by_handle.
* So we don't "sign flip" like most other routines. This means
* true errors need to be returned as a negative value.
*/
long
xfs_file_ioctl(
struct file *filp,
unsigned int cmd,
unsigned long p)
{
struct inode *inode = file_inode(filp);
struct xfs_inode *ip = XFS_I(inode);
struct xfs_mount *mp = ip->i_mount;
void __user *arg = (void __user *)p;
int error;
trace_xfs_file_ioctl(ip);
switch (cmd) {
case FITRIM:
return xfs_ioc_trim(mp, arg);
case FS_IOC_GETFSLABEL:
return xfs_ioc_getlabel(mp, arg);
case FS_IOC_SETFSLABEL:
return xfs_ioc_setlabel(filp, mp, arg);
case XFS_IOC_ALLOCSP:
case XFS_IOC_FREESP:
case XFS_IOC_ALLOCSP64:
case XFS_IOC_FREESP64:
xfs_warn_once(mp,
"%s should use fallocate; XFS_IOC_{ALLOC,FREE}SP ioctl unsupported",
current->comm);
return -ENOTTY;
case XFS_IOC_DIOINFO: {
struct xfs_buftarg *target = xfs_inode_buftarg(ip);
struct dioattr da;
da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
if (copy_to_user(arg, &da, sizeof(da)))
return -EFAULT;
return 0;
}
case XFS_IOC_FSBULKSTAT_SINGLE:
case XFS_IOC_FSBULKSTAT:
case XFS_IOC_FSINUMBERS:
return xfs_ioc_fsbulkstat(filp, cmd, arg);
case XFS_IOC_BULKSTAT:
return xfs_ioc_bulkstat(filp, cmd, arg);
case XFS_IOC_INUMBERS:
return xfs_ioc_inumbers(mp, cmd, arg);
case XFS_IOC_FSGEOMETRY_V1:
return xfs_ioc_fsgeometry(mp, arg, 3);
case XFS_IOC_FSGEOMETRY_V4:
return xfs_ioc_fsgeometry(mp, arg, 4);
case XFS_IOC_FSGEOMETRY:
return xfs_ioc_fsgeometry(mp, arg, 5);
case XFS_IOC_AG_GEOMETRY:
return xfs_ioc_ag_geometry(mp, arg);
case XFS_IOC_GETVERSION:
return put_user(inode->i_generation, (int __user *)arg);
case XFS_IOC_FSGETXATTRA:
return xfs_ioc_fsgetxattra(ip, arg);
case XFS_IOC_GETPARENTS:
return xfs_ioc_getparents(filp, arg);
case XFS_IOC_GETPARENTS_BY_HANDLE:
return xfs_ioc_getparents_by_handle(filp, arg);
case XFS_IOC_GETBMAP:
case XFS_IOC_GETBMAPA:
case XFS_IOC_GETBMAPX:
return xfs_ioc_getbmap(filp, cmd, arg);
case FS_IOC_GETFSMAP:
return xfs_ioc_getfsmap(ip, arg);
case XFS_IOC_SCRUBV_METADATA:
return xfs_ioc_scrubv_metadata(filp, arg);
case XFS_IOC_SCRUB_METADATA:
return xfs_ioc_scrub_metadata(filp, arg);
case XFS_IOC_FD_TO_HANDLE:
case XFS_IOC_PATH_TO_HANDLE:
case XFS_IOC_PATH_TO_FSHANDLE: {
xfs_fsop_handlereq_t hreq;
if (copy_from_user(&hreq, arg, sizeof(hreq)))
return -EFAULT;
return xfs_find_handle(cmd, &hreq);
}
case XFS_IOC_OPEN_BY_HANDLE: {
xfs_fsop_handlereq_t hreq;
if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
return -EFAULT;
return xfs_open_by_handle(filp, &hreq);
}
case XFS_IOC_READLINK_BY_HANDLE: {
xfs_fsop_handlereq_t hreq;
if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
return -EFAULT;
return xfs_readlink_by_handle(filp, &hreq);
}
case XFS_IOC_ATTRLIST_BY_HANDLE:
return xfs_attrlist_by_handle(filp, arg);
case XFS_IOC_ATTRMULTI_BY_HANDLE:
return xfs_attrmulti_by_handle(filp, arg);
case XFS_IOC_SWAPEXT: {
struct xfs_swapext sxp;
if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
return -EFAULT;
error = mnt_want_write_file(filp);
if (error)
return error;
error = xfs_ioc_swapext(&sxp);
mnt_drop_write_file(filp);
return error;
}
case XFS_IOC_FSCOUNTS:
return xfs_ioctl_fs_counts(mp, arg);
case XFS_IOC_SET_RESBLKS:
case XFS_IOC_GET_RESBLKS:
return xfs_ioctl_getset_resblocks(filp, cmd, arg);
case XFS_IOC_FSGROWFSDATA: {
struct xfs_growfs_data in;
if (copy_from_user(&in, arg, sizeof(in)))
return -EFAULT;
error = mnt_want_write_file(filp);
if (error)
return error;
error = xfs_growfs_data(mp, &in);
mnt_drop_write_file(filp);
return error;
}
case XFS_IOC_FSGROWFSLOG: {
struct xfs_growfs_log in;
if (copy_from_user(&in, arg, sizeof(in)))
return -EFAULT;
error = mnt_want_write_file(filp);
if (error)
return error;
error = xfs_growfs_log(mp, &in);
mnt_drop_write_file(filp);
return error;
}
case XFS_IOC_FSGROWFSRT: {
xfs_growfs_rt_t in;
if (copy_from_user(&in, arg, sizeof(in)))
return -EFAULT;
error = mnt_want_write_file(filp);
if (error)
return error;
error = xfs_growfs_rt(mp, &in);
mnt_drop_write_file(filp);
return error;
}
case XFS_IOC_GOINGDOWN: {
uint32_t in;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (get_user(in, (uint32_t __user *)arg))
return -EFAULT;
return xfs_fs_goingdown(mp, in);
}
case XFS_IOC_ERROR_INJECTION: {
xfs_error_injection_t in;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (copy_from_user(&in, arg, sizeof(in)))
return -EFAULT;
return xfs_errortag_add(mp, in.errtag);
}
case XFS_IOC_ERROR_CLEARALL:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
return xfs_errortag_clearall(mp);
case XFS_IOC_FREE_EOFBLOCKS: {
struct xfs_fs_eofblocks eofb;
struct xfs_icwalk icw;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (xfs_is_readonly(mp))
return -EROFS;
if (copy_from_user(&eofb, arg, sizeof(eofb)))
return -EFAULT;
error = xfs_fs_eofblocks_from_user(&eofb, &icw);
if (error)
return error;
trace_xfs_ioc_free_eofblocks(mp, &icw, _RET_IP_);
sb_start_write(mp->m_super);
error = xfs_blockgc_free_space(mp, &icw);
sb_end_write(mp->m_super);
return error;
}
case XFS_IOC_EXCHANGE_RANGE:
return xfs_ioc_exchange_range(filp, arg);
case XFS_IOC_START_COMMIT:
return xfs_ioc_start_commit(filp, arg);
case XFS_IOC_COMMIT_RANGE:
return xfs_ioc_commit_range(filp, arg);
default:
return -ENOTTY;
}
}
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