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
23 #include "xfs_trans.h"
27 #include "xfs_alloc.h"
28 #include "xfs_dmapi.h"
29 #include "xfs_mount.h"
30 #include "xfs_bmap_btree.h"
31 #include "xfs_alloc_btree.h"
32 #include "xfs_ialloc_btree.h"
33 #include "xfs_attr_sf.h"
34 #include "xfs_dir2_sf.h"
35 #include "xfs_dinode.h"
36 #include "xfs_inode.h"
37 #include "xfs_btree.h"
38 #include "xfs_ialloc.h"
39 #include "xfs_rtalloc.h"
40 #include "xfs_itable.h"
41 #include "xfs_error.h"
46 #include "xfs_buf_item.h"
47 #include "xfs_utils.h"
48 #include "xfs_dfrag.h"
49 #include "xfs_fsops.h"
50 #include "xfs_vnodeops.h"
51 #include "xfs_quota.h"
52 #include "xfs_inode_item.h"
53 #include "xfs_export.h"
55 #include <linux/capability.h>
56 #include <linux/dcache.h>
57 #include <linux/mount.h>
58 #include <linux/namei.h>
59 #include <linux/pagemap.h>
60 #include <linux/exportfs.h>
63 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
64 * a file or fs handle.
66 * XFS_IOC_PATH_TO_FSHANDLE
67 * returns fs handle for a mount point or path within that mount point
68 * XFS_IOC_FD_TO_HANDLE
69 * returns full handle for a FD opened in user space
70 * XFS_IOC_PATH_TO_HANDLE
71 * returns full handle for a path
76 xfs_fsop_handlereq_t
*hreq
)
81 struct file
*file
= NULL
;
86 if (cmd
== XFS_IOC_FD_TO_HANDLE
) {
87 file
= fget(hreq
->fd
);
90 inode
= file
->f_path
.dentry
->d_inode
;
92 error
= user_lpath((const char __user
*)hreq
->path
, &path
);
95 inode
= path
.dentry
->d_inode
;
100 * We can only generate handles for inodes residing on a XFS filesystem,
101 * and only for regular files, directories or symbolic links.
104 if (inode
->i_sb
->s_magic
!= XFS_SB_MAGIC
)
108 if (!S_ISREG(inode
->i_mode
) &&
109 !S_ISDIR(inode
->i_mode
) &&
110 !S_ISLNK(inode
->i_mode
))
114 memcpy(&handle
.ha_fsid
, ip
->i_mount
->m_fixedfsid
, sizeof(xfs_fsid_t
));
116 if (cmd
== XFS_IOC_PATH_TO_FSHANDLE
) {
118 * This handle only contains an fsid, zero the rest.
120 memset(&handle
.ha_fid
, 0, sizeof(handle
.ha_fid
));
121 hsize
= sizeof(xfs_fsid_t
);
125 lock_mode
= xfs_ilock_map_shared(ip
);
126 handle
.ha_fid
.fid_len
= sizeof(xfs_fid_t
) -
127 sizeof(handle
.ha_fid
.fid_len
);
128 handle
.ha_fid
.fid_pad
= 0;
129 handle
.ha_fid
.fid_gen
= ip
->i_d
.di_gen
;
130 handle
.ha_fid
.fid_ino
= ip
->i_ino
;
131 xfs_iunlock_map_shared(ip
, lock_mode
);
133 hsize
= XFS_HSIZE(handle
);
137 if (copy_to_user(hreq
->ohandle
, &handle
, hsize
) ||
138 copy_to_user(hreq
->ohandlen
, &hsize
, sizeof(__s32
)))
144 if (cmd
== XFS_IOC_FD_TO_HANDLE
)
152 * No need to do permission checks on the various pathname components
153 * as the handle operations are privileged.
156 xfs_handle_acceptable(
158 struct dentry
*dentry
)
164 * Convert userspace handle data into a dentry.
167 xfs_handle_to_dentry(
168 struct file
*parfilp
,
169 void __user
*uhandle
,
173 struct xfs_fid64 fid
;
176 * Only allow handle opens under a directory.
178 if (!S_ISDIR(parfilp
->f_path
.dentry
->d_inode
->i_mode
))
179 return ERR_PTR(-ENOTDIR
);
181 if (hlen
!= sizeof(xfs_handle_t
))
182 return ERR_PTR(-EINVAL
);
183 if (copy_from_user(&handle
, uhandle
, hlen
))
184 return ERR_PTR(-EFAULT
);
185 if (handle
.ha_fid
.fid_len
!=
186 sizeof(handle
.ha_fid
) - sizeof(handle
.ha_fid
.fid_len
))
187 return ERR_PTR(-EINVAL
);
189 memset(&fid
, 0, sizeof(struct fid
));
190 fid
.ino
= handle
.ha_fid
.fid_ino
;
191 fid
.gen
= handle
.ha_fid
.fid_gen
;
193 return exportfs_decode_fh(parfilp
->f_path
.mnt
, (struct fid
*)&fid
, 3,
194 FILEID_INO32_GEN
| XFS_FILEID_TYPE_64FLAG
,
195 xfs_handle_acceptable
, NULL
);
198 STATIC
struct dentry
*
199 xfs_handlereq_to_dentry(
200 struct file
*parfilp
,
201 xfs_fsop_handlereq_t
*hreq
)
203 return xfs_handle_to_dentry(parfilp
, hreq
->ihandle
, hreq
->ihandlen
);
208 struct file
*parfilp
,
209 xfs_fsop_handlereq_t
*hreq
)
211 const struct cred
*cred
= current_cred();
217 struct dentry
*dentry
;
219 if (!capable(CAP_SYS_ADMIN
))
220 return -XFS_ERROR(EPERM
);
222 dentry
= xfs_handlereq_to_dentry(parfilp
, hreq
);
224 return PTR_ERR(dentry
);
225 inode
= dentry
->d_inode
;
227 /* Restrict xfs_open_by_handle to directories & regular files. */
228 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
))) {
229 error
= -XFS_ERROR(EPERM
);
233 #if BITS_PER_LONG != 32
234 hreq
->oflags
|= O_LARGEFILE
;
237 /* Put open permission in namei format. */
238 permflag
= hreq
->oflags
;
239 if ((permflag
+1) & O_ACCMODE
)
241 if (permflag
& O_TRUNC
)
244 if ((!(permflag
& O_APPEND
) || (permflag
& O_TRUNC
)) &&
245 (permflag
& FMODE_WRITE
) && IS_APPEND(inode
)) {
246 error
= -XFS_ERROR(EPERM
);
250 if ((permflag
& FMODE_WRITE
) && IS_IMMUTABLE(inode
)) {
251 error
= -XFS_ERROR(EACCES
);
255 /* Can't write directories. */
256 if (S_ISDIR(inode
->i_mode
) && (permflag
& FMODE_WRITE
)) {
257 error
= -XFS_ERROR(EISDIR
);
261 fd
= get_unused_fd();
267 filp
= dentry_open(dentry
, mntget(parfilp
->f_path
.mnt
),
271 return PTR_ERR(filp
);
274 if (inode
->i_mode
& S_IFREG
) {
275 filp
->f_flags
|= O_NOATIME
;
276 filp
->f_mode
|= FMODE_NOCMTIME
;
279 fd_install(fd
, filp
);
288 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
289 * unused first argument.
304 if (len
> (unsigned) buflen
)
306 if (copy_to_user(buffer
, link
, len
))
314 xfs_readlink_by_handle(
315 struct file
*parfilp
,
316 xfs_fsop_handlereq_t
*hreq
)
318 struct dentry
*dentry
;
323 if (!capable(CAP_SYS_ADMIN
))
324 return -XFS_ERROR(EPERM
);
326 dentry
= xfs_handlereq_to_dentry(parfilp
, hreq
);
328 return PTR_ERR(dentry
);
330 /* Restrict this handle operation to symlinks only. */
331 if (!S_ISLNK(dentry
->d_inode
->i_mode
)) {
332 error
= -XFS_ERROR(EINVAL
);
336 if (copy_from_user(&olen
, hreq
->ohandlen
, sizeof(__u32
))) {
337 error
= -XFS_ERROR(EFAULT
);
341 link
= kmalloc(MAXPATHLEN
+1, GFP_KERNEL
);
343 error
= -XFS_ERROR(ENOMEM
);
347 error
= -xfs_readlink(XFS_I(dentry
->d_inode
), link
);
350 error
= do_readlink(hreq
->ohandle
, olen
, link
);
362 xfs_fssetdm_by_handle(
363 struct file
*parfilp
,
367 struct fsdmidata fsd
;
368 xfs_fsop_setdm_handlereq_t dmhreq
;
369 struct dentry
*dentry
;
371 if (!capable(CAP_MKNOD
))
372 return -XFS_ERROR(EPERM
);
373 if (copy_from_user(&dmhreq
, arg
, sizeof(xfs_fsop_setdm_handlereq_t
)))
374 return -XFS_ERROR(EFAULT
);
376 dentry
= xfs_handlereq_to_dentry(parfilp
, &dmhreq
.hreq
);
378 return PTR_ERR(dentry
);
380 if (IS_IMMUTABLE(dentry
->d_inode
) || IS_APPEND(dentry
->d_inode
)) {
381 error
= -XFS_ERROR(EPERM
);
385 if (copy_from_user(&fsd
, dmhreq
.data
, sizeof(fsd
))) {
386 error
= -XFS_ERROR(EFAULT
);
390 error
= -xfs_set_dmattrs(XFS_I(dentry
->d_inode
), fsd
.fsd_dmevmask
,
399 xfs_attrlist_by_handle(
400 struct file
*parfilp
,
404 attrlist_cursor_kern_t
*cursor
;
405 xfs_fsop_attrlist_handlereq_t al_hreq
;
406 struct dentry
*dentry
;
409 if (!capable(CAP_SYS_ADMIN
))
410 return -XFS_ERROR(EPERM
);
411 if (copy_from_user(&al_hreq
, arg
, sizeof(xfs_fsop_attrlist_handlereq_t
)))
412 return -XFS_ERROR(EFAULT
);
413 if (al_hreq
.buflen
> XATTR_LIST_MAX
)
414 return -XFS_ERROR(EINVAL
);
417 * Reject flags, only allow namespaces.
419 if (al_hreq
.flags
& ~(ATTR_ROOT
| ATTR_SECURE
))
420 return -XFS_ERROR(EINVAL
);
422 dentry
= xfs_handlereq_to_dentry(parfilp
, &al_hreq
.hreq
);
424 return PTR_ERR(dentry
);
426 kbuf
= kmalloc(al_hreq
.buflen
, GFP_KERNEL
);
430 cursor
= (attrlist_cursor_kern_t
*)&al_hreq
.pos
;
431 error
= -xfs_attr_list(XFS_I(dentry
->d_inode
), kbuf
, al_hreq
.buflen
,
432 al_hreq
.flags
, cursor
);
436 if (copy_to_user(al_hreq
.buffer
, kbuf
, al_hreq
.buflen
))
447 xfs_attrmulti_attr_get(
457 if (*len
> XATTR_SIZE_MAX
)
459 kbuf
= kmalloc(*len
, GFP_KERNEL
);
463 error
= xfs_attr_get(XFS_I(inode
), name
, kbuf
, (int *)len
, flags
);
467 if (copy_to_user(ubuf
, kbuf
, *len
))
476 xfs_attrmulti_attr_set(
479 const char __user
*ubuf
,
486 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
488 if (len
> XATTR_SIZE_MAX
)
491 kbuf
= kmalloc(len
, GFP_KERNEL
);
495 if (copy_from_user(kbuf
, ubuf
, len
))
498 error
= xfs_attr_set(XFS_I(inode
), name
, kbuf
, len
, flags
);
506 xfs_attrmulti_attr_remove(
511 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
513 return xfs_attr_remove(XFS_I(inode
), name
, flags
);
517 xfs_attrmulti_by_handle(
518 struct file
*parfilp
,
522 xfs_attr_multiop_t
*ops
;
523 xfs_fsop_attrmulti_handlereq_t am_hreq
;
524 struct dentry
*dentry
;
525 unsigned int i
, size
;
528 if (!capable(CAP_SYS_ADMIN
))
529 return -XFS_ERROR(EPERM
);
530 if (copy_from_user(&am_hreq
, arg
, sizeof(xfs_fsop_attrmulti_handlereq_t
)))
531 return -XFS_ERROR(EFAULT
);
533 dentry
= xfs_handlereq_to_dentry(parfilp
, &am_hreq
.hreq
);
535 return PTR_ERR(dentry
);
538 size
= am_hreq
.opcount
* sizeof(xfs_attr_multiop_t
);
539 if (!size
|| size
> 16 * PAGE_SIZE
)
543 ops
= kmalloc(size
, GFP_KERNEL
);
548 if (copy_from_user(ops
, am_hreq
.ops
, size
))
551 attr_name
= kmalloc(MAXNAMELEN
, GFP_KERNEL
);
557 for (i
= 0; i
< am_hreq
.opcount
; i
++) {
558 ops
[i
].am_error
= strncpy_from_user(attr_name
,
559 ops
[i
].am_attrname
, MAXNAMELEN
);
560 if (ops
[i
].am_error
== 0 || ops
[i
].am_error
== MAXNAMELEN
)
562 if (ops
[i
].am_error
< 0)
565 switch (ops
[i
].am_opcode
) {
567 ops
[i
].am_error
= xfs_attrmulti_attr_get(
568 dentry
->d_inode
, attr_name
,
569 ops
[i
].am_attrvalue
, &ops
[i
].am_length
,
573 ops
[i
].am_error
= mnt_want_write(parfilp
->f_path
.mnt
);
576 ops
[i
].am_error
= xfs_attrmulti_attr_set(
577 dentry
->d_inode
, attr_name
,
578 ops
[i
].am_attrvalue
, ops
[i
].am_length
,
580 mnt_drop_write(parfilp
->f_path
.mnt
);
583 ops
[i
].am_error
= mnt_want_write(parfilp
->f_path
.mnt
);
586 ops
[i
].am_error
= xfs_attrmulti_attr_remove(
587 dentry
->d_inode
, attr_name
,
589 mnt_drop_write(parfilp
->f_path
.mnt
);
592 ops
[i
].am_error
= EINVAL
;
596 if (copy_to_user(am_hreq
.ops
, ops
, size
))
597 error
= XFS_ERROR(EFAULT
);
609 struct xfs_inode
*ip
,
620 * Only allow the sys admin to reserve space unless
621 * unwritten extents are enabled.
623 if (!xfs_sb_version_hasextflgbit(&ip
->i_mount
->m_sb
) &&
624 !capable(CAP_SYS_ADMIN
))
625 return -XFS_ERROR(EPERM
);
627 if (inode
->i_flags
& (S_IMMUTABLE
|S_APPEND
))
628 return -XFS_ERROR(EPERM
);
630 if (!(filp
->f_mode
& FMODE_WRITE
))
631 return -XFS_ERROR(EBADF
);
633 if (!S_ISREG(inode
->i_mode
))
634 return -XFS_ERROR(EINVAL
);
636 if (filp
->f_flags
& (O_NDELAY
|O_NONBLOCK
))
637 attr_flags
|= XFS_ATTR_NONBLOCK
;
638 if (ioflags
& IO_INVIS
)
639 attr_flags
|= XFS_ATTR_DMI
;
641 error
= xfs_change_file_space(ip
, cmd
, bf
, filp
->f_pos
, attr_flags
);
651 xfs_fsop_bulkreq_t bulkreq
;
652 int count
; /* # of records returned */
653 xfs_ino_t inlast
; /* last inode number */
657 /* done = 1 if there are more stats to get and if bulkstat */
658 /* should be called again (unused here, but used in dmapi) */
660 if (!capable(CAP_SYS_ADMIN
))
663 if (XFS_FORCED_SHUTDOWN(mp
))
664 return -XFS_ERROR(EIO
);
666 if (copy_from_user(&bulkreq
, arg
, sizeof(xfs_fsop_bulkreq_t
)))
667 return -XFS_ERROR(EFAULT
);
669 if (copy_from_user(&inlast
, bulkreq
.lastip
, sizeof(__s64
)))
670 return -XFS_ERROR(EFAULT
);
672 if ((count
= bulkreq
.icount
) <= 0)
673 return -XFS_ERROR(EINVAL
);
675 if (bulkreq
.ubuffer
== NULL
)
676 return -XFS_ERROR(EINVAL
);
678 if (cmd
== XFS_IOC_FSINUMBERS
)
679 error
= xfs_inumbers(mp
, &inlast
, &count
,
680 bulkreq
.ubuffer
, xfs_inumbers_fmt
);
681 else if (cmd
== XFS_IOC_FSBULKSTAT_SINGLE
)
682 error
= xfs_bulkstat_single(mp
, &inlast
,
683 bulkreq
.ubuffer
, &done
);
684 else /* XFS_IOC_FSBULKSTAT */
685 error
= xfs_bulkstat(mp
, &inlast
, &count
,
686 (bulkstat_one_pf
)xfs_bulkstat_one
, NULL
,
687 sizeof(xfs_bstat_t
), bulkreq
.ubuffer
,
688 BULKSTAT_FG_QUICK
, &done
);
693 if (bulkreq
.ocount
!= NULL
) {
694 if (copy_to_user(bulkreq
.lastip
, &inlast
,
696 return -XFS_ERROR(EFAULT
);
698 if (copy_to_user(bulkreq
.ocount
, &count
, sizeof(count
)))
699 return -XFS_ERROR(EFAULT
);
706 xfs_ioc_fsgeometry_v1(
710 xfs_fsop_geom_v1_t fsgeo
;
713 error
= xfs_fs_geometry(mp
, (xfs_fsop_geom_t
*)&fsgeo
, 3);
717 if (copy_to_user(arg
, &fsgeo
, sizeof(fsgeo
)))
718 return -XFS_ERROR(EFAULT
);
727 xfs_fsop_geom_t fsgeo
;
730 error
= xfs_fs_geometry(mp
, &fsgeo
, 4);
734 if (copy_to_user(arg
, &fsgeo
, sizeof(fsgeo
)))
735 return -XFS_ERROR(EFAULT
);
740 * Linux extended inode flags interface.
744 xfs_merge_ioc_xflags(
748 unsigned int xflags
= start
;
750 if (flags
& FS_IMMUTABLE_FL
)
751 xflags
|= XFS_XFLAG_IMMUTABLE
;
753 xflags
&= ~XFS_XFLAG_IMMUTABLE
;
754 if (flags
& FS_APPEND_FL
)
755 xflags
|= XFS_XFLAG_APPEND
;
757 xflags
&= ~XFS_XFLAG_APPEND
;
758 if (flags
& FS_SYNC_FL
)
759 xflags
|= XFS_XFLAG_SYNC
;
761 xflags
&= ~XFS_XFLAG_SYNC
;
762 if (flags
& FS_NOATIME_FL
)
763 xflags
|= XFS_XFLAG_NOATIME
;
765 xflags
&= ~XFS_XFLAG_NOATIME
;
766 if (flags
& FS_NODUMP_FL
)
767 xflags
|= XFS_XFLAG_NODUMP
;
769 xflags
&= ~XFS_XFLAG_NODUMP
;
778 unsigned int flags
= 0;
780 if (di_flags
& XFS_DIFLAG_IMMUTABLE
)
781 flags
|= FS_IMMUTABLE_FL
;
782 if (di_flags
& XFS_DIFLAG_APPEND
)
783 flags
|= FS_APPEND_FL
;
784 if (di_flags
& XFS_DIFLAG_SYNC
)
786 if (di_flags
& XFS_DIFLAG_NOATIME
)
787 flags
|= FS_NOATIME_FL
;
788 if (di_flags
& XFS_DIFLAG_NODUMP
)
789 flags
|= FS_NODUMP_FL
;
801 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
802 fa
.fsx_xflags
= xfs_ip2xflags(ip
);
803 fa
.fsx_extsize
= ip
->i_d
.di_extsize
<< ip
->i_mount
->m_sb
.sb_blocklog
;
804 fa
.fsx_projid
= ip
->i_d
.di_projid
;
808 if (ip
->i_afp
->if_flags
& XFS_IFEXTENTS
)
809 fa
.fsx_nextents
= ip
->i_afp
->if_bytes
/
810 sizeof(xfs_bmbt_rec_t
);
812 fa
.fsx_nextents
= ip
->i_d
.di_anextents
;
816 if (ip
->i_df
.if_flags
& XFS_IFEXTENTS
)
817 fa
.fsx_nextents
= ip
->i_df
.if_bytes
/
818 sizeof(xfs_bmbt_rec_t
);
820 fa
.fsx_nextents
= ip
->i_d
.di_nextents
;
822 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
824 if (copy_to_user(arg
, &fa
, sizeof(fa
)))
831 struct xfs_inode
*ip
,
834 unsigned int di_flags
;
836 /* can't set PREALLOC this way, just preserve it */
837 di_flags
= (ip
->i_d
.di_flags
& XFS_DIFLAG_PREALLOC
);
838 if (xflags
& XFS_XFLAG_IMMUTABLE
)
839 di_flags
|= XFS_DIFLAG_IMMUTABLE
;
840 if (xflags
& XFS_XFLAG_APPEND
)
841 di_flags
|= XFS_DIFLAG_APPEND
;
842 if (xflags
& XFS_XFLAG_SYNC
)
843 di_flags
|= XFS_DIFLAG_SYNC
;
844 if (xflags
& XFS_XFLAG_NOATIME
)
845 di_flags
|= XFS_DIFLAG_NOATIME
;
846 if (xflags
& XFS_XFLAG_NODUMP
)
847 di_flags
|= XFS_DIFLAG_NODUMP
;
848 if (xflags
& XFS_XFLAG_PROJINHERIT
)
849 di_flags
|= XFS_DIFLAG_PROJINHERIT
;
850 if (xflags
& XFS_XFLAG_NODEFRAG
)
851 di_flags
|= XFS_DIFLAG_NODEFRAG
;
852 if (xflags
& XFS_XFLAG_FILESTREAM
)
853 di_flags
|= XFS_DIFLAG_FILESTREAM
;
854 if ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFDIR
) {
855 if (xflags
& XFS_XFLAG_RTINHERIT
)
856 di_flags
|= XFS_DIFLAG_RTINHERIT
;
857 if (xflags
& XFS_XFLAG_NOSYMLINKS
)
858 di_flags
|= XFS_DIFLAG_NOSYMLINKS
;
859 if (xflags
& XFS_XFLAG_EXTSZINHERIT
)
860 di_flags
|= XFS_DIFLAG_EXTSZINHERIT
;
861 } else if ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
) {
862 if (xflags
& XFS_XFLAG_REALTIME
)
863 di_flags
|= XFS_DIFLAG_REALTIME
;
864 if (xflags
& XFS_XFLAG_EXTSIZE
)
865 di_flags
|= XFS_DIFLAG_EXTSIZE
;
868 ip
->i_d
.di_flags
= di_flags
;
872 xfs_diflags_to_linux(
873 struct xfs_inode
*ip
)
875 struct inode
*inode
= VFS_I(ip
);
876 unsigned int xflags
= xfs_ip2xflags(ip
);
878 if (xflags
& XFS_XFLAG_IMMUTABLE
)
879 inode
->i_flags
|= S_IMMUTABLE
;
881 inode
->i_flags
&= ~S_IMMUTABLE
;
882 if (xflags
& XFS_XFLAG_APPEND
)
883 inode
->i_flags
|= S_APPEND
;
885 inode
->i_flags
&= ~S_APPEND
;
886 if (xflags
& XFS_XFLAG_SYNC
)
887 inode
->i_flags
|= S_SYNC
;
889 inode
->i_flags
&= ~S_SYNC
;
890 if (xflags
& XFS_XFLAG_NOATIME
)
891 inode
->i_flags
|= S_NOATIME
;
893 inode
->i_flags
&= ~S_NOATIME
;
897 #define FSX_EXTSIZE 2
899 #define FSX_NONBLOCK 8
907 struct xfs_mount
*mp
= ip
->i_mount
;
908 struct xfs_trans
*tp
;
909 unsigned int lock_flags
= 0;
910 struct xfs_dquot
*udqp
= NULL
, *gdqp
= NULL
;
911 struct xfs_dquot
*olddquot
= NULL
;
914 xfs_itrace_entry(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 * If disk quotas is on, we make sure that the dquots do exist on disk,
923 * before we start any other transactions. Trying to do this later
924 * is messy. We don't care to take a readlock to look at the ids
925 * in inode here, because we can't hold it across the trans_reserve.
926 * If the IDs do change before we take the ilock, we're covered
927 * because the i_*dquot fields will get updated anyway.
929 if (XFS_IS_QUOTA_ON(mp
) && (mask
& FSX_PROJID
)) {
930 code
= XFS_QM_DQVOPALLOC(mp
, ip
, ip
->i_d
.di_uid
,
931 ip
->i_d
.di_gid
, fa
->fsx_projid
,
932 XFS_QMOPT_PQUOTA
, &udqp
, &gdqp
);
938 * For the other attributes, we acquire the inode lock and
939 * first do an error checking pass.
941 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SETATTR_NOT_SIZE
);
942 code
= xfs_trans_reserve(tp
, 0, XFS_ICHANGE_LOG_RES(mp
), 0, 0, 0);
946 lock_flags
= XFS_ILOCK_EXCL
;
947 xfs_ilock(ip
, lock_flags
);
950 * CAP_FOWNER overrides the following restrictions:
952 * The user ID of the calling process must be equal
953 * to the file owner ID, except in cases where the
954 * CAP_FSETID capability is applicable.
956 if (current_fsuid() != ip
->i_d
.di_uid
&& !capable(CAP_FOWNER
)) {
957 code
= XFS_ERROR(EPERM
);
962 * Do a quota reservation only if projid is actually going to change.
964 if (mask
& FSX_PROJID
) {
965 if (XFS_IS_PQUOTA_ON(mp
) &&
966 ip
->i_d
.di_projid
!= fa
->fsx_projid
) {
968 code
= XFS_QM_DQVOPCHOWNRESV(mp
, tp
, ip
, udqp
, gdqp
,
969 capable(CAP_FOWNER
) ?
970 XFS_QMOPT_FORCE_RES
: 0);
971 if (code
) /* out of quota */
976 if (mask
& FSX_EXTSIZE
) {
978 * Can't change extent size if any extents are allocated.
980 if (ip
->i_d
.di_nextents
&&
981 ((ip
->i_d
.di_extsize
<< mp
->m_sb
.sb_blocklog
) !=
983 code
= XFS_ERROR(EINVAL
); /* EFBIG? */
988 * Extent size must be a multiple of the appropriate block
989 * size, if set at all.
991 if (fa
->fsx_extsize
!= 0) {
994 if (XFS_IS_REALTIME_INODE(ip
) ||
995 ((mask
& FSX_XFLAGS
) &&
996 (fa
->fsx_xflags
& XFS_XFLAG_REALTIME
))) {
997 size
= mp
->m_sb
.sb_rextsize
<<
998 mp
->m_sb
.sb_blocklog
;
1000 size
= mp
->m_sb
.sb_blocksize
;
1003 if (fa
->fsx_extsize
% size
) {
1004 code
= XFS_ERROR(EINVAL
);
1011 if (mask
& FSX_XFLAGS
) {
1013 * Can't change realtime flag if any extents are allocated.
1015 if ((ip
->i_d
.di_nextents
|| ip
->i_delayed_blks
) &&
1016 (XFS_IS_REALTIME_INODE(ip
)) !=
1017 (fa
->fsx_xflags
& XFS_XFLAG_REALTIME
)) {
1018 code
= XFS_ERROR(EINVAL
); /* EFBIG? */
1023 * If realtime flag is set then must have realtime data.
1025 if ((fa
->fsx_xflags
& XFS_XFLAG_REALTIME
)) {
1026 if ((mp
->m_sb
.sb_rblocks
== 0) ||
1027 (mp
->m_sb
.sb_rextsize
== 0) ||
1028 (ip
->i_d
.di_extsize
% mp
->m_sb
.sb_rextsize
)) {
1029 code
= XFS_ERROR(EINVAL
);
1035 * Can't modify an immutable/append-only file unless
1036 * we have appropriate permission.
1038 if ((ip
->i_d
.di_flags
&
1039 (XFS_DIFLAG_IMMUTABLE
|XFS_DIFLAG_APPEND
) ||
1041 (XFS_XFLAG_IMMUTABLE
| XFS_XFLAG_APPEND
))) &&
1042 !capable(CAP_LINUX_IMMUTABLE
)) {
1043 code
= XFS_ERROR(EPERM
);
1048 xfs_trans_ijoin(tp
, ip
, lock_flags
);
1049 xfs_trans_ihold(tp
, ip
);
1052 * Change file ownership. Must be the owner or privileged.
1054 if (mask
& FSX_PROJID
) {
1056 * CAP_FSETID overrides the following restrictions:
1058 * The set-user-ID and set-group-ID bits of a file will be
1059 * cleared upon successful return from chown()
1061 if ((ip
->i_d
.di_mode
& (S_ISUID
|S_ISGID
)) &&
1062 !capable(CAP_FSETID
))
1063 ip
->i_d
.di_mode
&= ~(S_ISUID
|S_ISGID
);
1066 * Change the ownerships and register quota modifications
1067 * in the transaction.
1069 if (ip
->i_d
.di_projid
!= fa
->fsx_projid
) {
1070 if (XFS_IS_PQUOTA_ON(mp
)) {
1071 olddquot
= XFS_QM_DQVOPCHOWN(mp
, tp
, ip
,
1072 &ip
->i_gdquot
, gdqp
);
1074 ip
->i_d
.di_projid
= fa
->fsx_projid
;
1077 * We may have to rev the inode as well as
1078 * the superblock version number since projids didn't
1079 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1081 if (ip
->i_d
.di_version
== 1)
1082 xfs_bump_ino_vers2(tp
, ip
);
1087 if (mask
& FSX_EXTSIZE
)
1088 ip
->i_d
.di_extsize
= fa
->fsx_extsize
>> mp
->m_sb
.sb_blocklog
;
1089 if (mask
& FSX_XFLAGS
) {
1090 xfs_set_diflags(ip
, fa
->fsx_xflags
);
1091 xfs_diflags_to_linux(ip
);
1094 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1095 xfs_ichgtime(ip
, XFS_ICHGTIME_CHG
);
1097 XFS_STATS_INC(xs_ig_attrchg
);
1100 * If this is a synchronous mount, make sure that the
1101 * transaction goes to disk before returning to the user.
1102 * This is slightly sub-optimal in that truncates require
1103 * two sync transactions instead of one for wsync filesystems.
1104 * One for the truncate and one for the timestamps since we
1105 * don't want to change the timestamps unless we're sure the
1106 * truncate worked. Truncates are less than 1% of the laddis
1107 * mix so this probably isn't worth the trouble to optimize.
1109 if (mp
->m_flags
& XFS_MOUNT_WSYNC
)
1110 xfs_trans_set_sync(tp
);
1111 code
= xfs_trans_commit(tp
, 0);
1112 xfs_iunlock(ip
, lock_flags
);
1115 * Release any dquot(s) the inode had kept before chown.
1117 XFS_QM_DQRELE(mp
, olddquot
);
1118 XFS_QM_DQRELE(mp
, udqp
);
1119 XFS_QM_DQRELE(mp
, gdqp
);
1124 if (DM_EVENT_ENABLED(ip
, DM_EVENT_ATTRIBUTE
)) {
1125 XFS_SEND_NAMESP(mp
, DM_EVENT_ATTRIBUTE
, ip
, DM_RIGHT_NULL
,
1126 NULL
, DM_RIGHT_NULL
, NULL
, NULL
, 0, 0,
1127 (mask
& FSX_NONBLOCK
) ? DM_FLAGS_NDELAY
: 0);
1133 XFS_QM_DQRELE(mp
, udqp
);
1134 XFS_QM_DQRELE(mp
, gdqp
);
1135 xfs_trans_cancel(tp
, 0);
1137 xfs_iunlock(ip
, lock_flags
);
1150 if (copy_from_user(&fa
, arg
, sizeof(fa
)))
1153 mask
= FSX_XFLAGS
| FSX_EXTSIZE
| FSX_PROJID
;
1154 if (filp
->f_flags
& (O_NDELAY
|O_NONBLOCK
))
1155 mask
|= FSX_NONBLOCK
;
1157 return -xfs_ioctl_setattr(ip
, &fa
, mask
);
1167 flags
= xfs_di2lxflags(ip
->i_d
.di_flags
);
1168 if (copy_to_user(arg
, &flags
, sizeof(flags
)))
1183 if (copy_from_user(&flags
, arg
, sizeof(flags
)))
1186 if (flags
& ~(FS_IMMUTABLE_FL
| FS_APPEND_FL
| \
1187 FS_NOATIME_FL
| FS_NODUMP_FL
| \
1192 if (filp
->f_flags
& (O_NDELAY
|O_NONBLOCK
))
1193 mask
|= FSX_NONBLOCK
;
1194 fa
.fsx_xflags
= xfs_merge_ioc_xflags(flags
, xfs_ip2xflags(ip
));
1196 return -xfs_ioctl_setattr(ip
, &fa
, mask
);
1200 xfs_getbmap_format(void **ap
, struct getbmapx
*bmv
, int *full
)
1202 struct getbmap __user
*base
= *ap
;
1204 /* copy only getbmap portion (not getbmapx) */
1205 if (copy_to_user(base
, bmv
, sizeof(struct getbmap
)))
1206 return XFS_ERROR(EFAULT
);
1208 *ap
+= sizeof(struct getbmap
);
1214 struct xfs_inode
*ip
,
1219 struct getbmapx bmx
;
1222 if (copy_from_user(&bmx
, arg
, sizeof(struct getbmapx
)))
1223 return -XFS_ERROR(EFAULT
);
1225 if (bmx
.bmv_count
< 2)
1226 return -XFS_ERROR(EINVAL
);
1228 bmx
.bmv_iflags
= (cmd
== XFS_IOC_GETBMAPA
? BMV_IF_ATTRFORK
: 0);
1229 if (ioflags
& IO_INVIS
)
1230 bmx
.bmv_iflags
|= BMV_IF_NO_DMAPI_READ
;
1232 error
= xfs_getbmap(ip
, &bmx
, xfs_getbmap_format
,
1233 (struct getbmap
*)arg
+1);
1237 /* copy back header - only size of getbmap */
1238 if (copy_to_user(arg
, &bmx
, sizeof(struct getbmap
)))
1239 return -XFS_ERROR(EFAULT
);
1244 xfs_getbmapx_format(void **ap
, struct getbmapx
*bmv
, int *full
)
1246 struct getbmapx __user
*base
= *ap
;
1248 if (copy_to_user(base
, bmv
, sizeof(struct getbmapx
)))
1249 return XFS_ERROR(EFAULT
);
1251 *ap
+= sizeof(struct getbmapx
);
1257 struct xfs_inode
*ip
,
1260 struct getbmapx bmx
;
1263 if (copy_from_user(&bmx
, arg
, sizeof(bmx
)))
1264 return -XFS_ERROR(EFAULT
);
1266 if (bmx
.bmv_count
< 2)
1267 return -XFS_ERROR(EINVAL
);
1269 if (bmx
.bmv_iflags
& (~BMV_IF_VALID
))
1270 return -XFS_ERROR(EINVAL
);
1272 error
= xfs_getbmap(ip
, &bmx
, xfs_getbmapx_format
,
1273 (struct getbmapx
*)arg
+1);
1277 /* copy back header */
1278 if (copy_to_user(arg
, &bmx
, sizeof(struct getbmapx
)))
1279 return -XFS_ERROR(EFAULT
);
1285 * Note: some of the ioctl's return positive numbers as a
1286 * byte count indicating success, such as readlink_by_handle.
1287 * So we don't "sign flip" like most other routines. This means
1288 * true errors need to be returned as a negative value.
1296 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
1297 struct xfs_inode
*ip
= XFS_I(inode
);
1298 struct xfs_mount
*mp
= ip
->i_mount
;
1299 void __user
*arg
= (void __user
*)p
;
1303 if (filp
->f_mode
& FMODE_NOCMTIME
)
1304 ioflags
|= IO_INVIS
;
1306 xfs_itrace_entry(ip
);
1309 case XFS_IOC_ALLOCSP
:
1310 case XFS_IOC_FREESP
:
1311 case XFS_IOC_RESVSP
:
1312 case XFS_IOC_UNRESVSP
:
1313 case XFS_IOC_ALLOCSP64
:
1314 case XFS_IOC_FREESP64
:
1315 case XFS_IOC_RESVSP64
:
1316 case XFS_IOC_UNRESVSP64
: {
1319 if (copy_from_user(&bf
, arg
, sizeof(bf
)))
1320 return -XFS_ERROR(EFAULT
);
1321 return xfs_ioc_space(ip
, inode
, filp
, ioflags
, cmd
, &bf
);
1323 case XFS_IOC_DIOINFO
: {
1325 xfs_buftarg_t
*target
=
1326 XFS_IS_REALTIME_INODE(ip
) ?
1327 mp
->m_rtdev_targp
: mp
->m_ddev_targp
;
1329 da
.d_mem
= da
.d_miniosz
= 1 << target
->bt_sshift
;
1330 da
.d_maxiosz
= INT_MAX
& ~(da
.d_miniosz
- 1);
1332 if (copy_to_user(arg
, &da
, sizeof(da
)))
1333 return -XFS_ERROR(EFAULT
);
1337 case XFS_IOC_FSBULKSTAT_SINGLE
:
1338 case XFS_IOC_FSBULKSTAT
:
1339 case XFS_IOC_FSINUMBERS
:
1340 return xfs_ioc_bulkstat(mp
, cmd
, arg
);
1342 case XFS_IOC_FSGEOMETRY_V1
:
1343 return xfs_ioc_fsgeometry_v1(mp
, arg
);
1345 case XFS_IOC_FSGEOMETRY
:
1346 return xfs_ioc_fsgeometry(mp
, arg
);
1348 case XFS_IOC_GETVERSION
:
1349 return put_user(inode
->i_generation
, (int __user
*)arg
);
1351 case XFS_IOC_FSGETXATTR
:
1352 return xfs_ioc_fsgetxattr(ip
, 0, arg
);
1353 case XFS_IOC_FSGETXATTRA
:
1354 return xfs_ioc_fsgetxattr(ip
, 1, arg
);
1355 case XFS_IOC_FSSETXATTR
:
1356 return xfs_ioc_fssetxattr(ip
, filp
, arg
);
1357 case XFS_IOC_GETXFLAGS
:
1358 return xfs_ioc_getxflags(ip
, arg
);
1359 case XFS_IOC_SETXFLAGS
:
1360 return xfs_ioc_setxflags(ip
, filp
, arg
);
1362 case XFS_IOC_FSSETDM
: {
1363 struct fsdmidata dmi
;
1365 if (copy_from_user(&dmi
, arg
, sizeof(dmi
)))
1366 return -XFS_ERROR(EFAULT
);
1368 error
= xfs_set_dmattrs(ip
, dmi
.fsd_dmevmask
,
1373 case XFS_IOC_GETBMAP
:
1374 case XFS_IOC_GETBMAPA
:
1375 return xfs_ioc_getbmap(ip
, ioflags
, cmd
, arg
);
1377 case XFS_IOC_GETBMAPX
:
1378 return xfs_ioc_getbmapx(ip
, arg
);
1380 case XFS_IOC_FD_TO_HANDLE
:
1381 case XFS_IOC_PATH_TO_HANDLE
:
1382 case XFS_IOC_PATH_TO_FSHANDLE
: {
1383 xfs_fsop_handlereq_t hreq
;
1385 if (copy_from_user(&hreq
, arg
, sizeof(hreq
)))
1386 return -XFS_ERROR(EFAULT
);
1387 return xfs_find_handle(cmd
, &hreq
);
1389 case XFS_IOC_OPEN_BY_HANDLE
: {
1390 xfs_fsop_handlereq_t hreq
;
1392 if (copy_from_user(&hreq
, arg
, sizeof(xfs_fsop_handlereq_t
)))
1393 return -XFS_ERROR(EFAULT
);
1394 return xfs_open_by_handle(filp
, &hreq
);
1396 case XFS_IOC_FSSETDM_BY_HANDLE
:
1397 return xfs_fssetdm_by_handle(filp
, arg
);
1399 case XFS_IOC_READLINK_BY_HANDLE
: {
1400 xfs_fsop_handlereq_t hreq
;
1402 if (copy_from_user(&hreq
, arg
, sizeof(xfs_fsop_handlereq_t
)))
1403 return -XFS_ERROR(EFAULT
);
1404 return xfs_readlink_by_handle(filp
, &hreq
);
1406 case XFS_IOC_ATTRLIST_BY_HANDLE
:
1407 return xfs_attrlist_by_handle(filp
, arg
);
1409 case XFS_IOC_ATTRMULTI_BY_HANDLE
:
1410 return xfs_attrmulti_by_handle(filp
, arg
);
1412 case XFS_IOC_SWAPEXT
: {
1413 struct xfs_swapext sxp
;
1415 if (copy_from_user(&sxp
, arg
, sizeof(xfs_swapext_t
)))
1416 return -XFS_ERROR(EFAULT
);
1417 error
= xfs_swapext(&sxp
);
1421 case XFS_IOC_FSCOUNTS
: {
1422 xfs_fsop_counts_t out
;
1424 error
= xfs_fs_counts(mp
, &out
);
1428 if (copy_to_user(arg
, &out
, sizeof(out
)))
1429 return -XFS_ERROR(EFAULT
);
1433 case XFS_IOC_SET_RESBLKS
: {
1434 xfs_fsop_resblks_t inout
;
1437 if (!capable(CAP_SYS_ADMIN
))
1440 if (copy_from_user(&inout
, arg
, sizeof(inout
)))
1441 return -XFS_ERROR(EFAULT
);
1443 /* input parameter is passed in resblks field of structure */
1445 error
= xfs_reserve_blocks(mp
, &in
, &inout
);
1449 if (copy_to_user(arg
, &inout
, sizeof(inout
)))
1450 return -XFS_ERROR(EFAULT
);
1454 case XFS_IOC_GET_RESBLKS
: {
1455 xfs_fsop_resblks_t out
;
1457 if (!capable(CAP_SYS_ADMIN
))
1460 error
= xfs_reserve_blocks(mp
, NULL
, &out
);
1464 if (copy_to_user(arg
, &out
, sizeof(out
)))
1465 return -XFS_ERROR(EFAULT
);
1470 case XFS_IOC_FSGROWFSDATA
: {
1471 xfs_growfs_data_t in
;
1473 if (copy_from_user(&in
, arg
, sizeof(in
)))
1474 return -XFS_ERROR(EFAULT
);
1476 error
= xfs_growfs_data(mp
, &in
);
1480 case XFS_IOC_FSGROWFSLOG
: {
1481 xfs_growfs_log_t in
;
1483 if (copy_from_user(&in
, arg
, sizeof(in
)))
1484 return -XFS_ERROR(EFAULT
);
1486 error
= xfs_growfs_log(mp
, &in
);
1490 case XFS_IOC_FSGROWFSRT
: {
1493 if (copy_from_user(&in
, arg
, sizeof(in
)))
1494 return -XFS_ERROR(EFAULT
);
1496 error
= xfs_growfs_rt(mp
, &in
);
1500 case XFS_IOC_GOINGDOWN
: {
1503 if (!capable(CAP_SYS_ADMIN
))
1506 if (get_user(in
, (__uint32_t __user
*)arg
))
1507 return -XFS_ERROR(EFAULT
);
1509 error
= xfs_fs_goingdown(mp
, in
);
1513 case XFS_IOC_ERROR_INJECTION
: {
1514 xfs_error_injection_t in
;
1516 if (!capable(CAP_SYS_ADMIN
))
1519 if (copy_from_user(&in
, arg
, sizeof(in
)))
1520 return -XFS_ERROR(EFAULT
);
1522 error
= xfs_errortag_add(in
.errtag
, mp
);
1526 case XFS_IOC_ERROR_CLEARALL
:
1527 if (!capable(CAP_SYS_ADMIN
))
1530 error
= xfs_errortag_clearall(mp
, 1);