2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "xfs_trans.h"
24 #include "xfs_alloc.h"
25 #include "xfs_mount.h"
26 #include "xfs_bmap_btree.h"
27 #include "xfs_dinode.h"
28 #include "xfs_inode.h"
29 #include "xfs_ioctl.h"
30 #include "xfs_rtalloc.h"
31 #include "xfs_itable.h"
32 #include "xfs_error.h"
35 #include "xfs_buf_item.h"
36 #include "xfs_utils.h"
37 #include "xfs_dfrag.h"
38 #include "xfs_fsops.h"
39 #include "xfs_vnodeops.h"
40 #include "xfs_discard.h"
41 #include "xfs_quota.h"
42 #include "xfs_inode_item.h"
43 #include "xfs_export.h"
44 #include "xfs_trace.h"
46 #include <linux/capability.h>
47 #include <linux/dcache.h>
48 #include <linux/mount.h>
49 #include <linux/namei.h>
50 #include <linux/pagemap.h>
51 #include <linux/slab.h>
52 #include <linux/exportfs.h>
55 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
56 * a file or fs handle.
58 * XFS_IOC_PATH_TO_FSHANDLE
59 * returns fs handle for a mount point or path within that mount point
60 * XFS_IOC_FD_TO_HANDLE
61 * returns full handle for a FD opened in user space
62 * XFS_IOC_PATH_TO_HANDLE
63 * returns full handle for a path
68 xfs_fsop_handlereq_t
*hreq
)
73 struct file
*file
= NULL
;
78 if (cmd
== XFS_IOC_FD_TO_HANDLE
) {
79 file
= fget(hreq
->fd
);
82 inode
= file
->f_path
.dentry
->d_inode
;
84 error
= user_lpath((const char __user
*)hreq
->path
, &path
);
87 inode
= path
.dentry
->d_inode
;
92 * We can only generate handles for inodes residing on a XFS filesystem,
93 * and only for regular files, directories or symbolic links.
96 if (inode
->i_sb
->s_magic
!= XFS_SB_MAGIC
)
100 if (!S_ISREG(inode
->i_mode
) &&
101 !S_ISDIR(inode
->i_mode
) &&
102 !S_ISLNK(inode
->i_mode
))
106 memcpy(&handle
.ha_fsid
, ip
->i_mount
->m_fixedfsid
, sizeof(xfs_fsid_t
));
108 if (cmd
== XFS_IOC_PATH_TO_FSHANDLE
) {
110 * This handle only contains an fsid, zero the rest.
112 memset(&handle
.ha_fid
, 0, sizeof(handle
.ha_fid
));
113 hsize
= sizeof(xfs_fsid_t
);
117 lock_mode
= xfs_ilock_map_shared(ip
);
118 handle
.ha_fid
.fid_len
= sizeof(xfs_fid_t
) -
119 sizeof(handle
.ha_fid
.fid_len
);
120 handle
.ha_fid
.fid_pad
= 0;
121 handle
.ha_fid
.fid_gen
= ip
->i_d
.di_gen
;
122 handle
.ha_fid
.fid_ino
= ip
->i_ino
;
123 xfs_iunlock_map_shared(ip
, lock_mode
);
125 hsize
= XFS_HSIZE(handle
);
129 if (copy_to_user(hreq
->ohandle
, &handle
, hsize
) ||
130 copy_to_user(hreq
->ohandlen
, &hsize
, sizeof(__s32
)))
136 if (cmd
== XFS_IOC_FD_TO_HANDLE
)
144 * No need to do permission checks on the various pathname components
145 * as the handle operations are privileged.
148 xfs_handle_acceptable(
150 struct dentry
*dentry
)
156 * Convert userspace handle data into a dentry.
159 xfs_handle_to_dentry(
160 struct file
*parfilp
,
161 void __user
*uhandle
,
165 struct xfs_fid64 fid
;
168 * Only allow handle opens under a directory.
170 if (!S_ISDIR(parfilp
->f_path
.dentry
->d_inode
->i_mode
))
171 return ERR_PTR(-ENOTDIR
);
173 if (hlen
!= sizeof(xfs_handle_t
))
174 return ERR_PTR(-EINVAL
);
175 if (copy_from_user(&handle
, uhandle
, hlen
))
176 return ERR_PTR(-EFAULT
);
177 if (handle
.ha_fid
.fid_len
!=
178 sizeof(handle
.ha_fid
) - sizeof(handle
.ha_fid
.fid_len
))
179 return ERR_PTR(-EINVAL
);
181 memset(&fid
, 0, sizeof(struct fid
));
182 fid
.ino
= handle
.ha_fid
.fid_ino
;
183 fid
.gen
= handle
.ha_fid
.fid_gen
;
185 return exportfs_decode_fh(parfilp
->f_path
.mnt
, (struct fid
*)&fid
, 3,
186 FILEID_INO32_GEN
| XFS_FILEID_TYPE_64FLAG
,
187 xfs_handle_acceptable
, NULL
);
190 STATIC
struct dentry
*
191 xfs_handlereq_to_dentry(
192 struct file
*parfilp
,
193 xfs_fsop_handlereq_t
*hreq
)
195 return xfs_handle_to_dentry(parfilp
, hreq
->ihandle
, hreq
->ihandlen
);
200 struct file
*parfilp
,
201 xfs_fsop_handlereq_t
*hreq
)
203 const struct cred
*cred
= current_cred();
209 struct dentry
*dentry
;
212 if (!capable(CAP_SYS_ADMIN
))
213 return -XFS_ERROR(EPERM
);
215 dentry
= xfs_handlereq_to_dentry(parfilp
, hreq
);
217 return PTR_ERR(dentry
);
218 inode
= dentry
->d_inode
;
220 /* Restrict xfs_open_by_handle to directories & regular files. */
221 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
))) {
222 error
= -XFS_ERROR(EPERM
);
226 #if BITS_PER_LONG != 32
227 hreq
->oflags
|= O_LARGEFILE
;
230 permflag
= hreq
->oflags
;
231 fmode
= OPEN_FMODE(permflag
);
232 if ((!(permflag
& O_APPEND
) || (permflag
& O_TRUNC
)) &&
233 (fmode
& FMODE_WRITE
) && IS_APPEND(inode
)) {
234 error
= -XFS_ERROR(EPERM
);
238 if ((fmode
& FMODE_WRITE
) && IS_IMMUTABLE(inode
)) {
239 error
= -XFS_ERROR(EACCES
);
243 /* Can't write directories. */
244 if (S_ISDIR(inode
->i_mode
) && (fmode
& FMODE_WRITE
)) {
245 error
= -XFS_ERROR(EISDIR
);
249 fd
= get_unused_fd();
255 filp
= dentry_open(dentry
, mntget(parfilp
->f_path
.mnt
),
259 return PTR_ERR(filp
);
262 if (S_ISREG(inode
->i_mode
)) {
263 filp
->f_flags
|= O_NOATIME
;
264 filp
->f_mode
|= FMODE_NOCMTIME
;
267 fd_install(fd
, filp
);
276 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
277 * unused first argument.
292 if (len
> (unsigned) buflen
)
294 if (copy_to_user(buffer
, link
, len
))
302 xfs_readlink_by_handle(
303 struct file
*parfilp
,
304 xfs_fsop_handlereq_t
*hreq
)
306 struct dentry
*dentry
;
311 if (!capable(CAP_SYS_ADMIN
))
312 return -XFS_ERROR(EPERM
);
314 dentry
= xfs_handlereq_to_dentry(parfilp
, hreq
);
316 return PTR_ERR(dentry
);
318 /* Restrict this handle operation to symlinks only. */
319 if (!S_ISLNK(dentry
->d_inode
->i_mode
)) {
320 error
= -XFS_ERROR(EINVAL
);
324 if (copy_from_user(&olen
, hreq
->ohandlen
, sizeof(__u32
))) {
325 error
= -XFS_ERROR(EFAULT
);
329 link
= kmalloc(MAXPATHLEN
+1, GFP_KERNEL
);
331 error
= -XFS_ERROR(ENOMEM
);
335 error
= -xfs_readlink(XFS_I(dentry
->d_inode
), link
);
338 error
= do_readlink(hreq
->ohandle
, olen
, link
);
350 xfs_fssetdm_by_handle(
351 struct file
*parfilp
,
355 struct fsdmidata fsd
;
356 xfs_fsop_setdm_handlereq_t dmhreq
;
357 struct dentry
*dentry
;
359 if (!capable(CAP_MKNOD
))
360 return -XFS_ERROR(EPERM
);
361 if (copy_from_user(&dmhreq
, arg
, sizeof(xfs_fsop_setdm_handlereq_t
)))
362 return -XFS_ERROR(EFAULT
);
364 dentry
= xfs_handlereq_to_dentry(parfilp
, &dmhreq
.hreq
);
366 return PTR_ERR(dentry
);
368 if (IS_IMMUTABLE(dentry
->d_inode
) || IS_APPEND(dentry
->d_inode
)) {
369 error
= -XFS_ERROR(EPERM
);
373 if (copy_from_user(&fsd
, dmhreq
.data
, sizeof(fsd
))) {
374 error
= -XFS_ERROR(EFAULT
);
378 error
= -xfs_set_dmattrs(XFS_I(dentry
->d_inode
), fsd
.fsd_dmevmask
,
387 xfs_attrlist_by_handle(
388 struct file
*parfilp
,
392 attrlist_cursor_kern_t
*cursor
;
393 xfs_fsop_attrlist_handlereq_t al_hreq
;
394 struct dentry
*dentry
;
397 if (!capable(CAP_SYS_ADMIN
))
398 return -XFS_ERROR(EPERM
);
399 if (copy_from_user(&al_hreq
, arg
, sizeof(xfs_fsop_attrlist_handlereq_t
)))
400 return -XFS_ERROR(EFAULT
);
401 if (al_hreq
.buflen
> XATTR_LIST_MAX
)
402 return -XFS_ERROR(EINVAL
);
405 * Reject flags, only allow namespaces.
407 if (al_hreq
.flags
& ~(ATTR_ROOT
| ATTR_SECURE
))
408 return -XFS_ERROR(EINVAL
);
410 dentry
= xfs_handlereq_to_dentry(parfilp
, &al_hreq
.hreq
);
412 return PTR_ERR(dentry
);
414 kbuf
= kzalloc(al_hreq
.buflen
, GFP_KERNEL
);
418 cursor
= (attrlist_cursor_kern_t
*)&al_hreq
.pos
;
419 error
= -xfs_attr_list(XFS_I(dentry
->d_inode
), kbuf
, al_hreq
.buflen
,
420 al_hreq
.flags
, cursor
);
424 if (copy_to_user(al_hreq
.buffer
, kbuf
, al_hreq
.buflen
))
435 xfs_attrmulti_attr_get(
438 unsigned char __user
*ubuf
,
445 if (*len
> XATTR_SIZE_MAX
)
447 kbuf
= kmem_zalloc(*len
, KM_SLEEP
| KM_MAYFAIL
);
449 kbuf
= kmem_zalloc_large(*len
);
454 error
= xfs_attr_get(XFS_I(inode
), name
, kbuf
, (int *)len
, flags
);
458 if (copy_to_user(ubuf
, kbuf
, *len
))
462 if (is_vmalloc_addr(kbuf
))
463 kmem_free_large(kbuf
);
470 xfs_attrmulti_attr_set(
473 const unsigned char __user
*ubuf
,
480 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
482 if (len
> XATTR_SIZE_MAX
)
485 kbuf
= memdup_user(ubuf
, len
);
487 return PTR_ERR(kbuf
);
489 error
= xfs_attr_set(XFS_I(inode
), name
, kbuf
, len
, flags
);
495 xfs_attrmulti_attr_remove(
500 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
502 return xfs_attr_remove(XFS_I(inode
), name
, flags
);
506 xfs_attrmulti_by_handle(
507 struct file
*parfilp
,
511 xfs_attr_multiop_t
*ops
;
512 xfs_fsop_attrmulti_handlereq_t am_hreq
;
513 struct dentry
*dentry
;
514 unsigned int i
, size
;
515 unsigned char *attr_name
;
517 if (!capable(CAP_SYS_ADMIN
))
518 return -XFS_ERROR(EPERM
);
519 if (copy_from_user(&am_hreq
, arg
, sizeof(xfs_fsop_attrmulti_handlereq_t
)))
520 return -XFS_ERROR(EFAULT
);
523 if (am_hreq
.opcount
>= INT_MAX
/ sizeof(xfs_attr_multiop_t
))
526 dentry
= xfs_handlereq_to_dentry(parfilp
, &am_hreq
.hreq
);
528 return PTR_ERR(dentry
);
531 size
= am_hreq
.opcount
* sizeof(xfs_attr_multiop_t
);
532 if (!size
|| size
> 16 * PAGE_SIZE
)
535 ops
= memdup_user(am_hreq
.ops
, size
);
537 error
= PTR_ERR(ops
);
541 attr_name
= kmalloc(MAXNAMELEN
, GFP_KERNEL
);
546 for (i
= 0; i
< am_hreq
.opcount
; i
++) {
547 ops
[i
].am_error
= strncpy_from_user((char *)attr_name
,
548 ops
[i
].am_attrname
, MAXNAMELEN
);
549 if (ops
[i
].am_error
== 0 || ops
[i
].am_error
== MAXNAMELEN
)
551 if (ops
[i
].am_error
< 0)
554 switch (ops
[i
].am_opcode
) {
556 ops
[i
].am_error
= xfs_attrmulti_attr_get(
557 dentry
->d_inode
, attr_name
,
558 ops
[i
].am_attrvalue
, &ops
[i
].am_length
,
562 ops
[i
].am_error
= mnt_want_write_file(parfilp
);
565 ops
[i
].am_error
= xfs_attrmulti_attr_set(
566 dentry
->d_inode
, attr_name
,
567 ops
[i
].am_attrvalue
, ops
[i
].am_length
,
569 mnt_drop_write_file(parfilp
);
572 ops
[i
].am_error
= mnt_want_write_file(parfilp
);
575 ops
[i
].am_error
= xfs_attrmulti_attr_remove(
576 dentry
->d_inode
, attr_name
,
578 mnt_drop_write_file(parfilp
);
581 ops
[i
].am_error
= EINVAL
;
585 if (copy_to_user(am_hreq
.ops
, ops
, size
))
586 error
= XFS_ERROR(EFAULT
);
598 struct xfs_inode
*ip
,
609 * Only allow the sys admin to reserve space unless
610 * unwritten extents are enabled.
612 if (!xfs_sb_version_hasextflgbit(&ip
->i_mount
->m_sb
) &&
613 !capable(CAP_SYS_ADMIN
))
614 return -XFS_ERROR(EPERM
);
616 if (inode
->i_flags
& (S_IMMUTABLE
|S_APPEND
))
617 return -XFS_ERROR(EPERM
);
619 if (!(filp
->f_mode
& FMODE_WRITE
))
620 return -XFS_ERROR(EBADF
);
622 if (!S_ISREG(inode
->i_mode
))
623 return -XFS_ERROR(EINVAL
);
625 if (filp
->f_flags
& (O_NDELAY
|O_NONBLOCK
))
626 attr_flags
|= XFS_ATTR_NONBLOCK
;
628 if (filp
->f_flags
& O_DSYNC
)
629 attr_flags
|= XFS_ATTR_SYNC
;
631 if (ioflags
& IO_INVIS
)
632 attr_flags
|= XFS_ATTR_DMI
;
634 error
= xfs_change_file_space(ip
, cmd
, bf
, filp
->f_pos
, attr_flags
);
644 xfs_fsop_bulkreq_t bulkreq
;
645 int count
; /* # of records returned */
646 xfs_ino_t inlast
; /* last inode number */
650 /* done = 1 if there are more stats to get and if bulkstat */
651 /* should be called again (unused here, but used in dmapi) */
653 if (!capable(CAP_SYS_ADMIN
))
656 if (XFS_FORCED_SHUTDOWN(mp
))
657 return -XFS_ERROR(EIO
);
659 if (copy_from_user(&bulkreq
, arg
, sizeof(xfs_fsop_bulkreq_t
)))
660 return -XFS_ERROR(EFAULT
);
662 if (copy_from_user(&inlast
, bulkreq
.lastip
, sizeof(__s64
)))
663 return -XFS_ERROR(EFAULT
);
665 if ((count
= bulkreq
.icount
) <= 0)
666 return -XFS_ERROR(EINVAL
);
668 if (bulkreq
.ubuffer
== NULL
)
669 return -XFS_ERROR(EINVAL
);
671 if (cmd
== XFS_IOC_FSINUMBERS
)
672 error
= xfs_inumbers(mp
, &inlast
, &count
,
673 bulkreq
.ubuffer
, xfs_inumbers_fmt
);
674 else if (cmd
== XFS_IOC_FSBULKSTAT_SINGLE
)
675 error
= xfs_bulkstat_single(mp
, &inlast
,
676 bulkreq
.ubuffer
, &done
);
677 else /* XFS_IOC_FSBULKSTAT */
678 error
= xfs_bulkstat(mp
, &inlast
, &count
, xfs_bulkstat_one
,
679 sizeof(xfs_bstat_t
), bulkreq
.ubuffer
,
685 if (bulkreq
.ocount
!= NULL
) {
686 if (copy_to_user(bulkreq
.lastip
, &inlast
,
688 return -XFS_ERROR(EFAULT
);
690 if (copy_to_user(bulkreq
.ocount
, &count
, sizeof(count
)))
691 return -XFS_ERROR(EFAULT
);
698 xfs_ioc_fsgeometry_v1(
702 xfs_fsop_geom_t fsgeo
;
705 error
= xfs_fs_geometry(mp
, &fsgeo
, 3);
710 * Caller should have passed an argument of type
711 * xfs_fsop_geom_v1_t. This is a proper subset of the
712 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
714 if (copy_to_user(arg
, &fsgeo
, sizeof(xfs_fsop_geom_v1_t
)))
715 return -XFS_ERROR(EFAULT
);
724 xfs_fsop_geom_t fsgeo
;
727 error
= xfs_fs_geometry(mp
, &fsgeo
, 4);
731 if (copy_to_user(arg
, &fsgeo
, sizeof(fsgeo
)))
732 return -XFS_ERROR(EFAULT
);
737 * Linux extended inode flags interface.
741 xfs_merge_ioc_xflags(
745 unsigned int xflags
= start
;
747 if (flags
& FS_IMMUTABLE_FL
)
748 xflags
|= XFS_XFLAG_IMMUTABLE
;
750 xflags
&= ~XFS_XFLAG_IMMUTABLE
;
751 if (flags
& FS_APPEND_FL
)
752 xflags
|= XFS_XFLAG_APPEND
;
754 xflags
&= ~XFS_XFLAG_APPEND
;
755 if (flags
& FS_SYNC_FL
)
756 xflags
|= XFS_XFLAG_SYNC
;
758 xflags
&= ~XFS_XFLAG_SYNC
;
759 if (flags
& FS_NOATIME_FL
)
760 xflags
|= XFS_XFLAG_NOATIME
;
762 xflags
&= ~XFS_XFLAG_NOATIME
;
763 if (flags
& FS_NODUMP_FL
)
764 xflags
|= XFS_XFLAG_NODUMP
;
766 xflags
&= ~XFS_XFLAG_NODUMP
;
775 unsigned int flags
= 0;
777 if (di_flags
& XFS_DIFLAG_IMMUTABLE
)
778 flags
|= FS_IMMUTABLE_FL
;
779 if (di_flags
& XFS_DIFLAG_APPEND
)
780 flags
|= FS_APPEND_FL
;
781 if (di_flags
& XFS_DIFLAG_SYNC
)
783 if (di_flags
& XFS_DIFLAG_NOATIME
)
784 flags
|= FS_NOATIME_FL
;
785 if (di_flags
& XFS_DIFLAG_NODUMP
)
786 flags
|= FS_NODUMP_FL
;
798 memset(&fa
, 0, sizeof(struct fsxattr
));
800 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
801 fa
.fsx_xflags
= xfs_ip2xflags(ip
);
802 fa
.fsx_extsize
= ip
->i_d
.di_extsize
<< ip
->i_mount
->m_sb
.sb_blocklog
;
803 fa
.fsx_projid
= xfs_get_projid(ip
);
807 if (ip
->i_afp
->if_flags
& XFS_IFEXTENTS
)
808 fa
.fsx_nextents
= ip
->i_afp
->if_bytes
/
809 sizeof(xfs_bmbt_rec_t
);
811 fa
.fsx_nextents
= ip
->i_d
.di_anextents
;
815 if (ip
->i_df
.if_flags
& XFS_IFEXTENTS
)
816 fa
.fsx_nextents
= ip
->i_df
.if_bytes
/
817 sizeof(xfs_bmbt_rec_t
);
819 fa
.fsx_nextents
= ip
->i_d
.di_nextents
;
821 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
823 if (copy_to_user(arg
, &fa
, sizeof(fa
)))
830 struct xfs_inode
*ip
,
833 unsigned int di_flags
;
835 /* can't set PREALLOC this way, just preserve it */
836 di_flags
= (ip
->i_d
.di_flags
& XFS_DIFLAG_PREALLOC
);
837 if (xflags
& XFS_XFLAG_IMMUTABLE
)
838 di_flags
|= XFS_DIFLAG_IMMUTABLE
;
839 if (xflags
& XFS_XFLAG_APPEND
)
840 di_flags
|= XFS_DIFLAG_APPEND
;
841 if (xflags
& XFS_XFLAG_SYNC
)
842 di_flags
|= XFS_DIFLAG_SYNC
;
843 if (xflags
& XFS_XFLAG_NOATIME
)
844 di_flags
|= XFS_DIFLAG_NOATIME
;
845 if (xflags
& XFS_XFLAG_NODUMP
)
846 di_flags
|= XFS_DIFLAG_NODUMP
;
847 if (xflags
& XFS_XFLAG_PROJINHERIT
)
848 di_flags
|= XFS_DIFLAG_PROJINHERIT
;
849 if (xflags
& XFS_XFLAG_NODEFRAG
)
850 di_flags
|= XFS_DIFLAG_NODEFRAG
;
851 if (xflags
& XFS_XFLAG_FILESTREAM
)
852 di_flags
|= XFS_DIFLAG_FILESTREAM
;
853 if (S_ISDIR(ip
->i_d
.di_mode
)) {
854 if (xflags
& XFS_XFLAG_RTINHERIT
)
855 di_flags
|= XFS_DIFLAG_RTINHERIT
;
856 if (xflags
& XFS_XFLAG_NOSYMLINKS
)
857 di_flags
|= XFS_DIFLAG_NOSYMLINKS
;
858 if (xflags
& XFS_XFLAG_EXTSZINHERIT
)
859 di_flags
|= XFS_DIFLAG_EXTSZINHERIT
;
860 } else if (S_ISREG(ip
->i_d
.di_mode
)) {
861 if (xflags
& XFS_XFLAG_REALTIME
)
862 di_flags
|= XFS_DIFLAG_REALTIME
;
863 if (xflags
& XFS_XFLAG_EXTSIZE
)
864 di_flags
|= XFS_DIFLAG_EXTSIZE
;
867 ip
->i_d
.di_flags
= di_flags
;
871 xfs_diflags_to_linux(
872 struct xfs_inode
*ip
)
874 struct inode
*inode
= VFS_I(ip
);
875 unsigned int xflags
= xfs_ip2xflags(ip
);
877 if (xflags
& XFS_XFLAG_IMMUTABLE
)
878 inode
->i_flags
|= S_IMMUTABLE
;
880 inode
->i_flags
&= ~S_IMMUTABLE
;
881 if (xflags
& XFS_XFLAG_APPEND
)
882 inode
->i_flags
|= S_APPEND
;
884 inode
->i_flags
&= ~S_APPEND
;
885 if (xflags
& XFS_XFLAG_SYNC
)
886 inode
->i_flags
|= S_SYNC
;
888 inode
->i_flags
&= ~S_SYNC
;
889 if (xflags
& XFS_XFLAG_NOATIME
)
890 inode
->i_flags
|= S_NOATIME
;
892 inode
->i_flags
&= ~S_NOATIME
;
896 #define FSX_EXTSIZE 2
898 #define FSX_NONBLOCK 8
906 struct xfs_mount
*mp
= ip
->i_mount
;
907 struct xfs_trans
*tp
;
908 unsigned int lock_flags
= 0;
909 struct xfs_dquot
*udqp
= NULL
;
910 struct xfs_dquot
*gdqp
= NULL
;
911 struct xfs_dquot
*olddquot
= NULL
;
914 trace_xfs_ioctl_setattr(ip
);
916 if (mp
->m_flags
& XFS_MOUNT_RDONLY
)
917 return XFS_ERROR(EROFS
);
918 if (XFS_FORCED_SHUTDOWN(mp
))
919 return XFS_ERROR(EIO
);
922 * Disallow 32bit project ids when projid32bit feature is not enabled.
924 if ((mask
& FSX_PROJID
) && (fa
->fsx_projid
> (__uint16_t
)-1) &&
925 !xfs_sb_version_hasprojid32bit(&ip
->i_mount
->m_sb
))
926 return XFS_ERROR(EINVAL
);
929 * If disk quotas is on, we make sure that the dquots do exist on disk,
930 * before we start any other transactions. Trying to do this later
931 * is messy. We don't care to take a readlock to look at the ids
932 * in inode here, because we can't hold it across the trans_reserve.
933 * If the IDs do change before we take the ilock, we're covered
934 * because the i_*dquot fields will get updated anyway.
936 if (XFS_IS_QUOTA_ON(mp
) && (mask
& FSX_PROJID
)) {
937 code
= xfs_qm_vop_dqalloc(ip
, ip
->i_d
.di_uid
,
938 ip
->i_d
.di_gid
, fa
->fsx_projid
,
939 XFS_QMOPT_PQUOTA
, &udqp
, &gdqp
);
945 * For the other attributes, we acquire the inode lock and
946 * first do an error checking pass.
948 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SETATTR_NOT_SIZE
);
949 code
= xfs_trans_reserve(tp
, 0, XFS_ICHANGE_LOG_RES(mp
), 0, 0, 0);
953 lock_flags
= XFS_ILOCK_EXCL
;
954 xfs_ilock(ip
, lock_flags
);
957 * CAP_FOWNER overrides the following restrictions:
959 * The user ID of the calling process must be equal
960 * to the file owner ID, except in cases where the
961 * CAP_FSETID capability is applicable.
963 if (current_fsuid() != ip
->i_d
.di_uid
&& !capable(CAP_FOWNER
)) {
964 code
= XFS_ERROR(EPERM
);
969 * Do a quota reservation only if projid is actually going to change.
971 if (mask
& FSX_PROJID
) {
972 if (XFS_IS_QUOTA_RUNNING(mp
) &&
973 XFS_IS_PQUOTA_ON(mp
) &&
974 xfs_get_projid(ip
) != fa
->fsx_projid
) {
976 code
= xfs_qm_vop_chown_reserve(tp
, ip
, udqp
, gdqp
,
977 capable(CAP_FOWNER
) ?
978 XFS_QMOPT_FORCE_RES
: 0);
979 if (code
) /* out of quota */
984 if (mask
& FSX_EXTSIZE
) {
986 * Can't change extent size if any extents are allocated.
988 if (ip
->i_d
.di_nextents
&&
989 ((ip
->i_d
.di_extsize
<< mp
->m_sb
.sb_blocklog
) !=
991 code
= XFS_ERROR(EINVAL
); /* EFBIG? */
996 * Extent size must be a multiple of the appropriate block
997 * size, if set at all. It must also be smaller than the
998 * maximum extent size supported by the filesystem.
1000 * Also, for non-realtime files, limit the extent size hint to
1001 * half the size of the AGs in the filesystem so alignment
1002 * doesn't result in extents larger than an AG.
1004 if (fa
->fsx_extsize
!= 0) {
1006 xfs_fsblock_t extsize_fsb
;
1008 extsize_fsb
= XFS_B_TO_FSB(mp
, fa
->fsx_extsize
);
1009 if (extsize_fsb
> MAXEXTLEN
) {
1010 code
= XFS_ERROR(EINVAL
);
1014 if (XFS_IS_REALTIME_INODE(ip
) ||
1015 ((mask
& FSX_XFLAGS
) &&
1016 (fa
->fsx_xflags
& XFS_XFLAG_REALTIME
))) {
1017 size
= mp
->m_sb
.sb_rextsize
<<
1018 mp
->m_sb
.sb_blocklog
;
1020 size
= mp
->m_sb
.sb_blocksize
;
1021 if (extsize_fsb
> mp
->m_sb
.sb_agblocks
/ 2) {
1022 code
= XFS_ERROR(EINVAL
);
1027 if (fa
->fsx_extsize
% size
) {
1028 code
= XFS_ERROR(EINVAL
);
1035 if (mask
& FSX_XFLAGS
) {
1037 * Can't change realtime flag if any extents are allocated.
1039 if ((ip
->i_d
.di_nextents
|| ip
->i_delayed_blks
) &&
1040 (XFS_IS_REALTIME_INODE(ip
)) !=
1041 (fa
->fsx_xflags
& XFS_XFLAG_REALTIME
)) {
1042 code
= XFS_ERROR(EINVAL
); /* EFBIG? */
1047 * If realtime flag is set then must have realtime data.
1049 if ((fa
->fsx_xflags
& XFS_XFLAG_REALTIME
)) {
1050 if ((mp
->m_sb
.sb_rblocks
== 0) ||
1051 (mp
->m_sb
.sb_rextsize
== 0) ||
1052 (ip
->i_d
.di_extsize
% mp
->m_sb
.sb_rextsize
)) {
1053 code
= XFS_ERROR(EINVAL
);
1059 * Can't modify an immutable/append-only file unless
1060 * we have appropriate permission.
1062 if ((ip
->i_d
.di_flags
&
1063 (XFS_DIFLAG_IMMUTABLE
|XFS_DIFLAG_APPEND
) ||
1065 (XFS_XFLAG_IMMUTABLE
| XFS_XFLAG_APPEND
))) &&
1066 !capable(CAP_LINUX_IMMUTABLE
)) {
1067 code
= XFS_ERROR(EPERM
);
1072 xfs_trans_ijoin(tp
, ip
, 0);
1075 * Change file ownership. Must be the owner or privileged.
1077 if (mask
& FSX_PROJID
) {
1079 * CAP_FSETID overrides the following restrictions:
1081 * The set-user-ID and set-group-ID bits of a file will be
1082 * cleared upon successful return from chown()
1084 if ((ip
->i_d
.di_mode
& (S_ISUID
|S_ISGID
)) &&
1085 !capable(CAP_FSETID
))
1086 ip
->i_d
.di_mode
&= ~(S_ISUID
|S_ISGID
);
1089 * Change the ownerships and register quota modifications
1090 * in the transaction.
1092 if (xfs_get_projid(ip
) != fa
->fsx_projid
) {
1093 if (XFS_IS_QUOTA_RUNNING(mp
) && XFS_IS_PQUOTA_ON(mp
)) {
1094 olddquot
= xfs_qm_vop_chown(tp
, ip
,
1095 &ip
->i_gdquot
, gdqp
);
1097 xfs_set_projid(ip
, fa
->fsx_projid
);
1100 * We may have to rev the inode as well as
1101 * the superblock version number since projids didn't
1102 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1104 if (ip
->i_d
.di_version
== 1)
1105 xfs_bump_ino_vers2(tp
, ip
);
1110 if (mask
& FSX_EXTSIZE
)
1111 ip
->i_d
.di_extsize
= fa
->fsx_extsize
>> mp
->m_sb
.sb_blocklog
;
1112 if (mask
& FSX_XFLAGS
) {
1113 xfs_set_diflags(ip
, fa
->fsx_xflags
);
1114 xfs_diflags_to_linux(ip
);
1117 xfs_trans_ichgtime(tp
, ip
, XFS_ICHGTIME_CHG
);
1118 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1120 XFS_STATS_INC(xs_ig_attrchg
);
1123 * If this is a synchronous mount, make sure that the
1124 * transaction goes to disk before returning to the user.
1125 * This is slightly sub-optimal in that truncates require
1126 * two sync transactions instead of one for wsync filesystems.
1127 * One for the truncate and one for the timestamps since we
1128 * don't want to change the timestamps unless we're sure the
1129 * truncate worked. Truncates are less than 1% of the laddis
1130 * mix so this probably isn't worth the trouble to optimize.
1132 if (mp
->m_flags
& XFS_MOUNT_WSYNC
)
1133 xfs_trans_set_sync(tp
);
1134 code
= xfs_trans_commit(tp
, 0);
1135 xfs_iunlock(ip
, lock_flags
);
1138 * Release any dquot(s) the inode had kept before chown.
1140 xfs_qm_dqrele(olddquot
);
1141 xfs_qm_dqrele(udqp
);
1142 xfs_qm_dqrele(gdqp
);
1147 xfs_qm_dqrele(udqp
);
1148 xfs_qm_dqrele(gdqp
);
1149 xfs_trans_cancel(tp
, 0);
1151 xfs_iunlock(ip
, lock_flags
);
1164 if (copy_from_user(&fa
, arg
, sizeof(fa
)))
1167 mask
= FSX_XFLAGS
| FSX_EXTSIZE
| FSX_PROJID
;
1168 if (filp
->f_flags
& (O_NDELAY
|O_NONBLOCK
))
1169 mask
|= FSX_NONBLOCK
;
1171 return -xfs_ioctl_setattr(ip
, &fa
, mask
);
1181 flags
= xfs_di2lxflags(ip
->i_d
.di_flags
);
1182 if (copy_to_user(arg
, &flags
, sizeof(flags
)))
1197 if (copy_from_user(&flags
, arg
, sizeof(flags
)))
1200 if (flags
& ~(FS_IMMUTABLE_FL
| FS_APPEND_FL
| \
1201 FS_NOATIME_FL
| FS_NODUMP_FL
| \
1206 if (filp
->f_flags
& (O_NDELAY
|O_NONBLOCK
))
1207 mask
|= FSX_NONBLOCK
;
1208 fa
.fsx_xflags
= xfs_merge_ioc_xflags(flags
, xfs_ip2xflags(ip
));
1210 return -xfs_ioctl_setattr(ip
, &fa
, mask
);
1214 xfs_getbmap_format(void **ap
, struct getbmapx
*bmv
, int *full
)
1216 struct getbmap __user
*base
= *ap
;
1218 /* copy only getbmap portion (not getbmapx) */
1219 if (copy_to_user(base
, bmv
, sizeof(struct getbmap
)))
1220 return XFS_ERROR(EFAULT
);
1222 *ap
+= sizeof(struct getbmap
);
1228 struct xfs_inode
*ip
,
1233 struct getbmapx bmx
;
1236 if (copy_from_user(&bmx
, arg
, sizeof(struct getbmapx
)))
1237 return -XFS_ERROR(EFAULT
);
1239 if (bmx
.bmv_count
< 2)
1240 return -XFS_ERROR(EINVAL
);
1242 bmx
.bmv_iflags
= (cmd
== XFS_IOC_GETBMAPA
? BMV_IF_ATTRFORK
: 0);
1243 if (ioflags
& IO_INVIS
)
1244 bmx
.bmv_iflags
|= BMV_IF_NO_DMAPI_READ
;
1246 error
= xfs_getbmap(ip
, &bmx
, xfs_getbmap_format
,
1247 (struct getbmap
*)arg
+1);
1251 /* copy back header - only size of getbmap */
1252 if (copy_to_user(arg
, &bmx
, sizeof(struct getbmap
)))
1253 return -XFS_ERROR(EFAULT
);
1258 xfs_getbmapx_format(void **ap
, struct getbmapx
*bmv
, int *full
)
1260 struct getbmapx __user
*base
= *ap
;
1262 if (copy_to_user(base
, bmv
, sizeof(struct getbmapx
)))
1263 return XFS_ERROR(EFAULT
);
1265 *ap
+= sizeof(struct getbmapx
);
1271 struct xfs_inode
*ip
,
1274 struct getbmapx bmx
;
1277 if (copy_from_user(&bmx
, arg
, sizeof(bmx
)))
1278 return -XFS_ERROR(EFAULT
);
1280 if (bmx
.bmv_count
< 2)
1281 return -XFS_ERROR(EINVAL
);
1283 if (bmx
.bmv_iflags
& (~BMV_IF_VALID
))
1284 return -XFS_ERROR(EINVAL
);
1286 error
= xfs_getbmap(ip
, &bmx
, xfs_getbmapx_format
,
1287 (struct getbmapx
*)arg
+1);
1291 /* copy back header */
1292 if (copy_to_user(arg
, &bmx
, sizeof(struct getbmapx
)))
1293 return -XFS_ERROR(EFAULT
);
1299 * Note: some of the ioctl's return positive numbers as a
1300 * byte count indicating success, such as readlink_by_handle.
1301 * So we don't "sign flip" like most other routines. This means
1302 * true errors need to be returned as a negative value.
1310 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
1311 struct xfs_inode
*ip
= XFS_I(inode
);
1312 struct xfs_mount
*mp
= ip
->i_mount
;
1313 void __user
*arg
= (void __user
*)p
;
1317 if (filp
->f_mode
& FMODE_NOCMTIME
)
1318 ioflags
|= IO_INVIS
;
1320 trace_xfs_file_ioctl(ip
);
1324 return xfs_ioc_trim(mp
, arg
);
1325 case XFS_IOC_ALLOCSP
:
1326 case XFS_IOC_FREESP
:
1327 case XFS_IOC_RESVSP
:
1328 case XFS_IOC_UNRESVSP
:
1329 case XFS_IOC_ALLOCSP64
:
1330 case XFS_IOC_FREESP64
:
1331 case XFS_IOC_RESVSP64
:
1332 case XFS_IOC_UNRESVSP64
:
1333 case XFS_IOC_ZERO_RANGE
: {
1336 if (copy_from_user(&bf
, arg
, sizeof(bf
)))
1337 return -XFS_ERROR(EFAULT
);
1338 return xfs_ioc_space(ip
, inode
, filp
, ioflags
, cmd
, &bf
);
1340 case XFS_IOC_DIOINFO
: {
1342 xfs_buftarg_t
*target
=
1343 XFS_IS_REALTIME_INODE(ip
) ?
1344 mp
->m_rtdev_targp
: mp
->m_ddev_targp
;
1346 da
.d_mem
= da
.d_miniosz
= 1 << target
->bt_sshift
;
1347 da
.d_maxiosz
= INT_MAX
& ~(da
.d_miniosz
- 1);
1349 if (copy_to_user(arg
, &da
, sizeof(da
)))
1350 return -XFS_ERROR(EFAULT
);
1354 case XFS_IOC_FSBULKSTAT_SINGLE
:
1355 case XFS_IOC_FSBULKSTAT
:
1356 case XFS_IOC_FSINUMBERS
:
1357 return xfs_ioc_bulkstat(mp
, cmd
, arg
);
1359 case XFS_IOC_FSGEOMETRY_V1
:
1360 return xfs_ioc_fsgeometry_v1(mp
, arg
);
1362 case XFS_IOC_FSGEOMETRY
:
1363 return xfs_ioc_fsgeometry(mp
, arg
);
1365 case XFS_IOC_GETVERSION
:
1366 return put_user(inode
->i_generation
, (int __user
*)arg
);
1368 case XFS_IOC_FSGETXATTR
:
1369 return xfs_ioc_fsgetxattr(ip
, 0, arg
);
1370 case XFS_IOC_FSGETXATTRA
:
1371 return xfs_ioc_fsgetxattr(ip
, 1, arg
);
1372 case XFS_IOC_FSSETXATTR
:
1373 return xfs_ioc_fssetxattr(ip
, filp
, arg
);
1374 case XFS_IOC_GETXFLAGS
:
1375 return xfs_ioc_getxflags(ip
, arg
);
1376 case XFS_IOC_SETXFLAGS
:
1377 return xfs_ioc_setxflags(ip
, filp
, arg
);
1379 case XFS_IOC_FSSETDM
: {
1380 struct fsdmidata dmi
;
1382 if (copy_from_user(&dmi
, arg
, sizeof(dmi
)))
1383 return -XFS_ERROR(EFAULT
);
1385 error
= xfs_set_dmattrs(ip
, dmi
.fsd_dmevmask
,
1390 case XFS_IOC_GETBMAP
:
1391 case XFS_IOC_GETBMAPA
:
1392 return xfs_ioc_getbmap(ip
, ioflags
, cmd
, arg
);
1394 case XFS_IOC_GETBMAPX
:
1395 return xfs_ioc_getbmapx(ip
, arg
);
1397 case XFS_IOC_FD_TO_HANDLE
:
1398 case XFS_IOC_PATH_TO_HANDLE
:
1399 case XFS_IOC_PATH_TO_FSHANDLE
: {
1400 xfs_fsop_handlereq_t hreq
;
1402 if (copy_from_user(&hreq
, arg
, sizeof(hreq
)))
1403 return -XFS_ERROR(EFAULT
);
1404 return xfs_find_handle(cmd
, &hreq
);
1406 case XFS_IOC_OPEN_BY_HANDLE
: {
1407 xfs_fsop_handlereq_t hreq
;
1409 if (copy_from_user(&hreq
, arg
, sizeof(xfs_fsop_handlereq_t
)))
1410 return -XFS_ERROR(EFAULT
);
1411 return xfs_open_by_handle(filp
, &hreq
);
1413 case XFS_IOC_FSSETDM_BY_HANDLE
:
1414 return xfs_fssetdm_by_handle(filp
, arg
);
1416 case XFS_IOC_READLINK_BY_HANDLE
: {
1417 xfs_fsop_handlereq_t hreq
;
1419 if (copy_from_user(&hreq
, arg
, sizeof(xfs_fsop_handlereq_t
)))
1420 return -XFS_ERROR(EFAULT
);
1421 return xfs_readlink_by_handle(filp
, &hreq
);
1423 case XFS_IOC_ATTRLIST_BY_HANDLE
:
1424 return xfs_attrlist_by_handle(filp
, arg
);
1426 case XFS_IOC_ATTRMULTI_BY_HANDLE
:
1427 return xfs_attrmulti_by_handle(filp
, arg
);
1429 case XFS_IOC_SWAPEXT
: {
1430 struct xfs_swapext sxp
;
1432 if (copy_from_user(&sxp
, arg
, sizeof(xfs_swapext_t
)))
1433 return -XFS_ERROR(EFAULT
);
1434 error
= xfs_swapext(&sxp
);
1438 case XFS_IOC_FSCOUNTS
: {
1439 xfs_fsop_counts_t out
;
1441 error
= xfs_fs_counts(mp
, &out
);
1445 if (copy_to_user(arg
, &out
, sizeof(out
)))
1446 return -XFS_ERROR(EFAULT
);
1450 case XFS_IOC_SET_RESBLKS
: {
1451 xfs_fsop_resblks_t inout
;
1454 if (!capable(CAP_SYS_ADMIN
))
1457 if (mp
->m_flags
& XFS_MOUNT_RDONLY
)
1458 return -XFS_ERROR(EROFS
);
1460 if (copy_from_user(&inout
, arg
, sizeof(inout
)))
1461 return -XFS_ERROR(EFAULT
);
1463 /* input parameter is passed in resblks field of structure */
1465 error
= xfs_reserve_blocks(mp
, &in
, &inout
);
1469 if (copy_to_user(arg
, &inout
, sizeof(inout
)))
1470 return -XFS_ERROR(EFAULT
);
1474 case XFS_IOC_GET_RESBLKS
: {
1475 xfs_fsop_resblks_t out
;
1477 if (!capable(CAP_SYS_ADMIN
))
1480 error
= xfs_reserve_blocks(mp
, NULL
, &out
);
1484 if (copy_to_user(arg
, &out
, sizeof(out
)))
1485 return -XFS_ERROR(EFAULT
);
1490 case XFS_IOC_FSGROWFSDATA
: {
1491 xfs_growfs_data_t in
;
1493 if (copy_from_user(&in
, arg
, sizeof(in
)))
1494 return -XFS_ERROR(EFAULT
);
1496 error
= xfs_growfs_data(mp
, &in
);
1500 case XFS_IOC_FSGROWFSLOG
: {
1501 xfs_growfs_log_t in
;
1503 if (copy_from_user(&in
, arg
, sizeof(in
)))
1504 return -XFS_ERROR(EFAULT
);
1506 error
= xfs_growfs_log(mp
, &in
);
1510 case XFS_IOC_FSGROWFSRT
: {
1513 if (copy_from_user(&in
, arg
, sizeof(in
)))
1514 return -XFS_ERROR(EFAULT
);
1516 error
= xfs_growfs_rt(mp
, &in
);
1520 case XFS_IOC_GOINGDOWN
: {
1523 if (!capable(CAP_SYS_ADMIN
))
1526 if (get_user(in
, (__uint32_t __user
*)arg
))
1527 return -XFS_ERROR(EFAULT
);
1529 error
= xfs_fs_goingdown(mp
, in
);
1533 case XFS_IOC_ERROR_INJECTION
: {
1534 xfs_error_injection_t in
;
1536 if (!capable(CAP_SYS_ADMIN
))
1539 if (copy_from_user(&in
, arg
, sizeof(in
)))
1540 return -XFS_ERROR(EFAULT
);
1542 error
= xfs_errortag_add(in
.errtag
, mp
);
1546 case XFS_IOC_ERROR_CLEARALL
:
1547 if (!capable(CAP_SYS_ADMIN
))
1550 error
= xfs_errortag_clearall(mp
, 1);