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_ioctl.h"
38 #include "xfs_btree.h"
39 #include "xfs_ialloc.h"
40 #include "xfs_rtalloc.h"
41 #include "xfs_itable.h"
42 #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
= memdup_user(ubuf
, len
);
493 return PTR_ERR(kbuf
);
495 error
= xfs_attr_set(XFS_I(inode
), name
, kbuf
, len
, flags
);
501 xfs_attrmulti_attr_remove(
506 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
508 return xfs_attr_remove(XFS_I(inode
), name
, flags
);
512 xfs_attrmulti_by_handle(
513 struct file
*parfilp
,
517 xfs_attr_multiop_t
*ops
;
518 xfs_fsop_attrmulti_handlereq_t am_hreq
;
519 struct dentry
*dentry
;
520 unsigned int i
, size
;
523 if (!capable(CAP_SYS_ADMIN
))
524 return -XFS_ERROR(EPERM
);
525 if (copy_from_user(&am_hreq
, arg
, sizeof(xfs_fsop_attrmulti_handlereq_t
)))
526 return -XFS_ERROR(EFAULT
);
528 dentry
= xfs_handlereq_to_dentry(parfilp
, &am_hreq
.hreq
);
530 return PTR_ERR(dentry
);
533 size
= am_hreq
.opcount
* sizeof(xfs_attr_multiop_t
);
534 if (!size
|| size
> 16 * PAGE_SIZE
)
537 ops
= memdup_user(am_hreq
.ops
, size
);
539 error
= PTR_ERR(ops
);
543 attr_name
= kmalloc(MAXNAMELEN
, GFP_KERNEL
);
548 for (i
= 0; i
< am_hreq
.opcount
; i
++) {
549 ops
[i
].am_error
= strncpy_from_user(attr_name
,
550 ops
[i
].am_attrname
, MAXNAMELEN
);
551 if (ops
[i
].am_error
== 0 || ops
[i
].am_error
== MAXNAMELEN
)
553 if (ops
[i
].am_error
< 0)
556 switch (ops
[i
].am_opcode
) {
558 ops
[i
].am_error
= xfs_attrmulti_attr_get(
559 dentry
->d_inode
, attr_name
,
560 ops
[i
].am_attrvalue
, &ops
[i
].am_length
,
564 ops
[i
].am_error
= mnt_want_write(parfilp
->f_path
.mnt
);
567 ops
[i
].am_error
= xfs_attrmulti_attr_set(
568 dentry
->d_inode
, attr_name
,
569 ops
[i
].am_attrvalue
, ops
[i
].am_length
,
571 mnt_drop_write(parfilp
->f_path
.mnt
);
574 ops
[i
].am_error
= mnt_want_write(parfilp
->f_path
.mnt
);
577 ops
[i
].am_error
= xfs_attrmulti_attr_remove(
578 dentry
->d_inode
, attr_name
,
580 mnt_drop_write(parfilp
->f_path
.mnt
);
583 ops
[i
].am_error
= EINVAL
;
587 if (copy_to_user(am_hreq
.ops
, ops
, size
))
588 error
= XFS_ERROR(EFAULT
);
600 struct xfs_inode
*ip
,
611 * Only allow the sys admin to reserve space unless
612 * unwritten extents are enabled.
614 if (!xfs_sb_version_hasextflgbit(&ip
->i_mount
->m_sb
) &&
615 !capable(CAP_SYS_ADMIN
))
616 return -XFS_ERROR(EPERM
);
618 if (inode
->i_flags
& (S_IMMUTABLE
|S_APPEND
))
619 return -XFS_ERROR(EPERM
);
621 if (!(filp
->f_mode
& FMODE_WRITE
))
622 return -XFS_ERROR(EBADF
);
624 if (!S_ISREG(inode
->i_mode
))
625 return -XFS_ERROR(EINVAL
);
627 if (filp
->f_flags
& (O_NDELAY
|O_NONBLOCK
))
628 attr_flags
|= XFS_ATTR_NONBLOCK
;
629 if (ioflags
& IO_INVIS
)
630 attr_flags
|= XFS_ATTR_DMI
;
632 error
= xfs_change_file_space(ip
, cmd
, bf
, filp
->f_pos
, attr_flags
);
642 xfs_fsop_bulkreq_t bulkreq
;
643 int count
; /* # of records returned */
644 xfs_ino_t inlast
; /* last inode number */
648 /* done = 1 if there are more stats to get and if bulkstat */
649 /* should be called again (unused here, but used in dmapi) */
651 if (!capable(CAP_SYS_ADMIN
))
654 if (XFS_FORCED_SHUTDOWN(mp
))
655 return -XFS_ERROR(EIO
);
657 if (copy_from_user(&bulkreq
, arg
, sizeof(xfs_fsop_bulkreq_t
)))
658 return -XFS_ERROR(EFAULT
);
660 if (copy_from_user(&inlast
, bulkreq
.lastip
, sizeof(__s64
)))
661 return -XFS_ERROR(EFAULT
);
663 if ((count
= bulkreq
.icount
) <= 0)
664 return -XFS_ERROR(EINVAL
);
666 if (bulkreq
.ubuffer
== NULL
)
667 return -XFS_ERROR(EINVAL
);
669 if (cmd
== XFS_IOC_FSINUMBERS
)
670 error
= xfs_inumbers(mp
, &inlast
, &count
,
671 bulkreq
.ubuffer
, xfs_inumbers_fmt
);
672 else if (cmd
== XFS_IOC_FSBULKSTAT_SINGLE
)
673 error
= xfs_bulkstat_single(mp
, &inlast
,
674 bulkreq
.ubuffer
, &done
);
675 else /* XFS_IOC_FSBULKSTAT */
676 error
= xfs_bulkstat(mp
, &inlast
, &count
,
677 (bulkstat_one_pf
)xfs_bulkstat_one
, NULL
,
678 sizeof(xfs_bstat_t
), bulkreq
.ubuffer
,
679 BULKSTAT_FG_QUICK
, &done
);
684 if (bulkreq
.ocount
!= NULL
) {
685 if (copy_to_user(bulkreq
.lastip
, &inlast
,
687 return -XFS_ERROR(EFAULT
);
689 if (copy_to_user(bulkreq
.ocount
, &count
, sizeof(count
)))
690 return -XFS_ERROR(EFAULT
);
697 xfs_ioc_fsgeometry_v1(
701 xfs_fsop_geom_v1_t fsgeo
;
704 error
= xfs_fs_geometry(mp
, (xfs_fsop_geom_t
*)&fsgeo
, 3);
708 if (copy_to_user(arg
, &fsgeo
, sizeof(fsgeo
)))
709 return -XFS_ERROR(EFAULT
);
718 xfs_fsop_geom_t fsgeo
;
721 error
= xfs_fs_geometry(mp
, &fsgeo
, 4);
725 if (copy_to_user(arg
, &fsgeo
, sizeof(fsgeo
)))
726 return -XFS_ERROR(EFAULT
);
731 * Linux extended inode flags interface.
735 xfs_merge_ioc_xflags(
739 unsigned int xflags
= start
;
741 if (flags
& FS_IMMUTABLE_FL
)
742 xflags
|= XFS_XFLAG_IMMUTABLE
;
744 xflags
&= ~XFS_XFLAG_IMMUTABLE
;
745 if (flags
& FS_APPEND_FL
)
746 xflags
|= XFS_XFLAG_APPEND
;
748 xflags
&= ~XFS_XFLAG_APPEND
;
749 if (flags
& FS_SYNC_FL
)
750 xflags
|= XFS_XFLAG_SYNC
;
752 xflags
&= ~XFS_XFLAG_SYNC
;
753 if (flags
& FS_NOATIME_FL
)
754 xflags
|= XFS_XFLAG_NOATIME
;
756 xflags
&= ~XFS_XFLAG_NOATIME
;
757 if (flags
& FS_NODUMP_FL
)
758 xflags
|= XFS_XFLAG_NODUMP
;
760 xflags
&= ~XFS_XFLAG_NODUMP
;
769 unsigned int flags
= 0;
771 if (di_flags
& XFS_DIFLAG_IMMUTABLE
)
772 flags
|= FS_IMMUTABLE_FL
;
773 if (di_flags
& XFS_DIFLAG_APPEND
)
774 flags
|= FS_APPEND_FL
;
775 if (di_flags
& XFS_DIFLAG_SYNC
)
777 if (di_flags
& XFS_DIFLAG_NOATIME
)
778 flags
|= FS_NOATIME_FL
;
779 if (di_flags
& XFS_DIFLAG_NODUMP
)
780 flags
|= FS_NODUMP_FL
;
792 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
793 fa
.fsx_xflags
= xfs_ip2xflags(ip
);
794 fa
.fsx_extsize
= ip
->i_d
.di_extsize
<< ip
->i_mount
->m_sb
.sb_blocklog
;
795 fa
.fsx_projid
= ip
->i_d
.di_projid
;
799 if (ip
->i_afp
->if_flags
& XFS_IFEXTENTS
)
800 fa
.fsx_nextents
= ip
->i_afp
->if_bytes
/
801 sizeof(xfs_bmbt_rec_t
);
803 fa
.fsx_nextents
= ip
->i_d
.di_anextents
;
807 if (ip
->i_df
.if_flags
& XFS_IFEXTENTS
)
808 fa
.fsx_nextents
= ip
->i_df
.if_bytes
/
809 sizeof(xfs_bmbt_rec_t
);
811 fa
.fsx_nextents
= ip
->i_d
.di_nextents
;
813 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
815 if (copy_to_user(arg
, &fa
, sizeof(fa
)))
822 struct xfs_inode
*ip
,
825 unsigned int di_flags
;
827 /* can't set PREALLOC this way, just preserve it */
828 di_flags
= (ip
->i_d
.di_flags
& XFS_DIFLAG_PREALLOC
);
829 if (xflags
& XFS_XFLAG_IMMUTABLE
)
830 di_flags
|= XFS_DIFLAG_IMMUTABLE
;
831 if (xflags
& XFS_XFLAG_APPEND
)
832 di_flags
|= XFS_DIFLAG_APPEND
;
833 if (xflags
& XFS_XFLAG_SYNC
)
834 di_flags
|= XFS_DIFLAG_SYNC
;
835 if (xflags
& XFS_XFLAG_NOATIME
)
836 di_flags
|= XFS_DIFLAG_NOATIME
;
837 if (xflags
& XFS_XFLAG_NODUMP
)
838 di_flags
|= XFS_DIFLAG_NODUMP
;
839 if (xflags
& XFS_XFLAG_PROJINHERIT
)
840 di_flags
|= XFS_DIFLAG_PROJINHERIT
;
841 if (xflags
& XFS_XFLAG_NODEFRAG
)
842 di_flags
|= XFS_DIFLAG_NODEFRAG
;
843 if (xflags
& XFS_XFLAG_FILESTREAM
)
844 di_flags
|= XFS_DIFLAG_FILESTREAM
;
845 if ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFDIR
) {
846 if (xflags
& XFS_XFLAG_RTINHERIT
)
847 di_flags
|= XFS_DIFLAG_RTINHERIT
;
848 if (xflags
& XFS_XFLAG_NOSYMLINKS
)
849 di_flags
|= XFS_DIFLAG_NOSYMLINKS
;
850 if (xflags
& XFS_XFLAG_EXTSZINHERIT
)
851 di_flags
|= XFS_DIFLAG_EXTSZINHERIT
;
852 } else if ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
) {
853 if (xflags
& XFS_XFLAG_REALTIME
)
854 di_flags
|= XFS_DIFLAG_REALTIME
;
855 if (xflags
& XFS_XFLAG_EXTSIZE
)
856 di_flags
|= XFS_DIFLAG_EXTSIZE
;
859 ip
->i_d
.di_flags
= di_flags
;
863 xfs_diflags_to_linux(
864 struct xfs_inode
*ip
)
866 struct inode
*inode
= VFS_I(ip
);
867 unsigned int xflags
= xfs_ip2xflags(ip
);
869 if (xflags
& XFS_XFLAG_IMMUTABLE
)
870 inode
->i_flags
|= S_IMMUTABLE
;
872 inode
->i_flags
&= ~S_IMMUTABLE
;
873 if (xflags
& XFS_XFLAG_APPEND
)
874 inode
->i_flags
|= S_APPEND
;
876 inode
->i_flags
&= ~S_APPEND
;
877 if (xflags
& XFS_XFLAG_SYNC
)
878 inode
->i_flags
|= S_SYNC
;
880 inode
->i_flags
&= ~S_SYNC
;
881 if (xflags
& XFS_XFLAG_NOATIME
)
882 inode
->i_flags
|= S_NOATIME
;
884 inode
->i_flags
&= ~S_NOATIME
;
888 #define FSX_EXTSIZE 2
890 #define FSX_NONBLOCK 8
898 struct xfs_mount
*mp
= ip
->i_mount
;
899 struct xfs_trans
*tp
;
900 unsigned int lock_flags
= 0;
901 struct xfs_dquot
*udqp
= NULL
;
902 struct xfs_dquot
*gdqp
= NULL
;
903 struct xfs_dquot
*olddquot
= NULL
;
906 xfs_itrace_entry(ip
);
908 if (mp
->m_flags
& XFS_MOUNT_RDONLY
)
909 return XFS_ERROR(EROFS
);
910 if (XFS_FORCED_SHUTDOWN(mp
))
911 return XFS_ERROR(EIO
);
914 * If disk quotas is on, we make sure that the dquots do exist on disk,
915 * before we start any other transactions. Trying to do this later
916 * is messy. We don't care to take a readlock to look at the ids
917 * in inode here, because we can't hold it across the trans_reserve.
918 * If the IDs do change before we take the ilock, we're covered
919 * because the i_*dquot fields will get updated anyway.
921 if (XFS_IS_QUOTA_ON(mp
) && (mask
& FSX_PROJID
)) {
922 code
= xfs_qm_vop_dqalloc(ip
, ip
->i_d
.di_uid
,
923 ip
->i_d
.di_gid
, fa
->fsx_projid
,
924 XFS_QMOPT_PQUOTA
, &udqp
, &gdqp
);
930 * For the other attributes, we acquire the inode lock and
931 * first do an error checking pass.
933 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SETATTR_NOT_SIZE
);
934 code
= xfs_trans_reserve(tp
, 0, XFS_ICHANGE_LOG_RES(mp
), 0, 0, 0);
938 lock_flags
= XFS_ILOCK_EXCL
;
939 xfs_ilock(ip
, lock_flags
);
942 * CAP_FOWNER overrides the following restrictions:
944 * The user ID of the calling process must be equal
945 * to the file owner ID, except in cases where the
946 * CAP_FSETID capability is applicable.
948 if (current_fsuid() != ip
->i_d
.di_uid
&& !capable(CAP_FOWNER
)) {
949 code
= XFS_ERROR(EPERM
);
954 * Do a quota reservation only if projid is actually going to change.
956 if (mask
& FSX_PROJID
) {
957 if (XFS_IS_QUOTA_RUNNING(mp
) &&
958 XFS_IS_PQUOTA_ON(mp
) &&
959 ip
->i_d
.di_projid
!= fa
->fsx_projid
) {
961 code
= xfs_qm_vop_chown_reserve(tp
, ip
, udqp
, gdqp
,
962 capable(CAP_FOWNER
) ?
963 XFS_QMOPT_FORCE_RES
: 0);
964 if (code
) /* out of quota */
969 if (mask
& FSX_EXTSIZE
) {
971 * Can't change extent size if any extents are allocated.
973 if (ip
->i_d
.di_nextents
&&
974 ((ip
->i_d
.di_extsize
<< mp
->m_sb
.sb_blocklog
) !=
976 code
= XFS_ERROR(EINVAL
); /* EFBIG? */
981 * Extent size must be a multiple of the appropriate block
982 * size, if set at all.
984 if (fa
->fsx_extsize
!= 0) {
987 if (XFS_IS_REALTIME_INODE(ip
) ||
988 ((mask
& FSX_XFLAGS
) &&
989 (fa
->fsx_xflags
& XFS_XFLAG_REALTIME
))) {
990 size
= mp
->m_sb
.sb_rextsize
<<
991 mp
->m_sb
.sb_blocklog
;
993 size
= mp
->m_sb
.sb_blocksize
;
996 if (fa
->fsx_extsize
% size
) {
997 code
= XFS_ERROR(EINVAL
);
1004 if (mask
& FSX_XFLAGS
) {
1006 * Can't change realtime flag if any extents are allocated.
1008 if ((ip
->i_d
.di_nextents
|| ip
->i_delayed_blks
) &&
1009 (XFS_IS_REALTIME_INODE(ip
)) !=
1010 (fa
->fsx_xflags
& XFS_XFLAG_REALTIME
)) {
1011 code
= XFS_ERROR(EINVAL
); /* EFBIG? */
1016 * If realtime flag is set then must have realtime data.
1018 if ((fa
->fsx_xflags
& XFS_XFLAG_REALTIME
)) {
1019 if ((mp
->m_sb
.sb_rblocks
== 0) ||
1020 (mp
->m_sb
.sb_rextsize
== 0) ||
1021 (ip
->i_d
.di_extsize
% mp
->m_sb
.sb_rextsize
)) {
1022 code
= XFS_ERROR(EINVAL
);
1028 * Can't modify an immutable/append-only file unless
1029 * we have appropriate permission.
1031 if ((ip
->i_d
.di_flags
&
1032 (XFS_DIFLAG_IMMUTABLE
|XFS_DIFLAG_APPEND
) ||
1034 (XFS_XFLAG_IMMUTABLE
| XFS_XFLAG_APPEND
))) &&
1035 !capable(CAP_LINUX_IMMUTABLE
)) {
1036 code
= XFS_ERROR(EPERM
);
1041 xfs_trans_ijoin(tp
, ip
, lock_flags
);
1042 xfs_trans_ihold(tp
, ip
);
1045 * Change file ownership. Must be the owner or privileged.
1047 if (mask
& FSX_PROJID
) {
1049 * CAP_FSETID overrides the following restrictions:
1051 * The set-user-ID and set-group-ID bits of a file will be
1052 * cleared upon successful return from chown()
1054 if ((ip
->i_d
.di_mode
& (S_ISUID
|S_ISGID
)) &&
1055 !capable(CAP_FSETID
))
1056 ip
->i_d
.di_mode
&= ~(S_ISUID
|S_ISGID
);
1059 * Change the ownerships and register quota modifications
1060 * in the transaction.
1062 if (ip
->i_d
.di_projid
!= fa
->fsx_projid
) {
1063 if (XFS_IS_QUOTA_RUNNING(mp
) && XFS_IS_PQUOTA_ON(mp
)) {
1064 olddquot
= xfs_qm_vop_chown(tp
, ip
,
1065 &ip
->i_gdquot
, gdqp
);
1067 ip
->i_d
.di_projid
= fa
->fsx_projid
;
1070 * We may have to rev the inode as well as
1071 * the superblock version number since projids didn't
1072 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1074 if (ip
->i_d
.di_version
== 1)
1075 xfs_bump_ino_vers2(tp
, ip
);
1080 if (mask
& FSX_EXTSIZE
)
1081 ip
->i_d
.di_extsize
= fa
->fsx_extsize
>> mp
->m_sb
.sb_blocklog
;
1082 if (mask
& FSX_XFLAGS
) {
1083 xfs_set_diflags(ip
, fa
->fsx_xflags
);
1084 xfs_diflags_to_linux(ip
);
1087 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1088 xfs_ichgtime(ip
, XFS_ICHGTIME_CHG
);
1090 XFS_STATS_INC(xs_ig_attrchg
);
1093 * If this is a synchronous mount, make sure that the
1094 * transaction goes to disk before returning to the user.
1095 * This is slightly sub-optimal in that truncates require
1096 * two sync transactions instead of one for wsync filesystems.
1097 * One for the truncate and one for the timestamps since we
1098 * don't want to change the timestamps unless we're sure the
1099 * truncate worked. Truncates are less than 1% of the laddis
1100 * mix so this probably isn't worth the trouble to optimize.
1102 if (mp
->m_flags
& XFS_MOUNT_WSYNC
)
1103 xfs_trans_set_sync(tp
);
1104 code
= xfs_trans_commit(tp
, 0);
1105 xfs_iunlock(ip
, lock_flags
);
1108 * Release any dquot(s) the inode had kept before chown.
1110 xfs_qm_dqrele(olddquot
);
1111 xfs_qm_dqrele(udqp
);
1112 xfs_qm_dqrele(gdqp
);
1117 if (DM_EVENT_ENABLED(ip
, DM_EVENT_ATTRIBUTE
)) {
1118 XFS_SEND_NAMESP(mp
, DM_EVENT_ATTRIBUTE
, ip
, DM_RIGHT_NULL
,
1119 NULL
, DM_RIGHT_NULL
, NULL
, NULL
, 0, 0,
1120 (mask
& FSX_NONBLOCK
) ? DM_FLAGS_NDELAY
: 0);
1126 xfs_qm_dqrele(udqp
);
1127 xfs_qm_dqrele(gdqp
);
1128 xfs_trans_cancel(tp
, 0);
1130 xfs_iunlock(ip
, lock_flags
);
1143 if (copy_from_user(&fa
, arg
, sizeof(fa
)))
1146 mask
= FSX_XFLAGS
| FSX_EXTSIZE
| FSX_PROJID
;
1147 if (filp
->f_flags
& (O_NDELAY
|O_NONBLOCK
))
1148 mask
|= FSX_NONBLOCK
;
1150 return -xfs_ioctl_setattr(ip
, &fa
, mask
);
1160 flags
= xfs_di2lxflags(ip
->i_d
.di_flags
);
1161 if (copy_to_user(arg
, &flags
, sizeof(flags
)))
1176 if (copy_from_user(&flags
, arg
, sizeof(flags
)))
1179 if (flags
& ~(FS_IMMUTABLE_FL
| FS_APPEND_FL
| \
1180 FS_NOATIME_FL
| FS_NODUMP_FL
| \
1185 if (filp
->f_flags
& (O_NDELAY
|O_NONBLOCK
))
1186 mask
|= FSX_NONBLOCK
;
1187 fa
.fsx_xflags
= xfs_merge_ioc_xflags(flags
, xfs_ip2xflags(ip
));
1189 return -xfs_ioctl_setattr(ip
, &fa
, mask
);
1193 xfs_getbmap_format(void **ap
, struct getbmapx
*bmv
, int *full
)
1195 struct getbmap __user
*base
= *ap
;
1197 /* copy only getbmap portion (not getbmapx) */
1198 if (copy_to_user(base
, bmv
, sizeof(struct getbmap
)))
1199 return XFS_ERROR(EFAULT
);
1201 *ap
+= sizeof(struct getbmap
);
1207 struct xfs_inode
*ip
,
1212 struct getbmapx bmx
;
1215 if (copy_from_user(&bmx
, arg
, sizeof(struct getbmapx
)))
1216 return -XFS_ERROR(EFAULT
);
1218 if (bmx
.bmv_count
< 2)
1219 return -XFS_ERROR(EINVAL
);
1221 bmx
.bmv_iflags
= (cmd
== XFS_IOC_GETBMAPA
? BMV_IF_ATTRFORK
: 0);
1222 if (ioflags
& IO_INVIS
)
1223 bmx
.bmv_iflags
|= BMV_IF_NO_DMAPI_READ
;
1225 error
= xfs_getbmap(ip
, &bmx
, xfs_getbmap_format
,
1226 (struct getbmap
*)arg
+1);
1230 /* copy back header - only size of getbmap */
1231 if (copy_to_user(arg
, &bmx
, sizeof(struct getbmap
)))
1232 return -XFS_ERROR(EFAULT
);
1237 xfs_getbmapx_format(void **ap
, struct getbmapx
*bmv
, int *full
)
1239 struct getbmapx __user
*base
= *ap
;
1241 if (copy_to_user(base
, bmv
, sizeof(struct getbmapx
)))
1242 return XFS_ERROR(EFAULT
);
1244 *ap
+= sizeof(struct getbmapx
);
1250 struct xfs_inode
*ip
,
1253 struct getbmapx bmx
;
1256 if (copy_from_user(&bmx
, arg
, sizeof(bmx
)))
1257 return -XFS_ERROR(EFAULT
);
1259 if (bmx
.bmv_count
< 2)
1260 return -XFS_ERROR(EINVAL
);
1262 if (bmx
.bmv_iflags
& (~BMV_IF_VALID
))
1263 return -XFS_ERROR(EINVAL
);
1265 error
= xfs_getbmap(ip
, &bmx
, xfs_getbmapx_format
,
1266 (struct getbmapx
*)arg
+1);
1270 /* copy back header */
1271 if (copy_to_user(arg
, &bmx
, sizeof(struct getbmapx
)))
1272 return -XFS_ERROR(EFAULT
);
1278 * Note: some of the ioctl's return positive numbers as a
1279 * byte count indicating success, such as readlink_by_handle.
1280 * So we don't "sign flip" like most other routines. This means
1281 * true errors need to be returned as a negative value.
1289 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
1290 struct xfs_inode
*ip
= XFS_I(inode
);
1291 struct xfs_mount
*mp
= ip
->i_mount
;
1292 void __user
*arg
= (void __user
*)p
;
1296 if (filp
->f_mode
& FMODE_NOCMTIME
)
1297 ioflags
|= IO_INVIS
;
1299 xfs_itrace_entry(ip
);
1302 case XFS_IOC_ALLOCSP
:
1303 case XFS_IOC_FREESP
:
1304 case XFS_IOC_RESVSP
:
1305 case XFS_IOC_UNRESVSP
:
1306 case XFS_IOC_ALLOCSP64
:
1307 case XFS_IOC_FREESP64
:
1308 case XFS_IOC_RESVSP64
:
1309 case XFS_IOC_UNRESVSP64
: {
1312 if (copy_from_user(&bf
, arg
, sizeof(bf
)))
1313 return -XFS_ERROR(EFAULT
);
1314 return xfs_ioc_space(ip
, inode
, filp
, ioflags
, cmd
, &bf
);
1316 case XFS_IOC_DIOINFO
: {
1318 xfs_buftarg_t
*target
=
1319 XFS_IS_REALTIME_INODE(ip
) ?
1320 mp
->m_rtdev_targp
: mp
->m_ddev_targp
;
1322 da
.d_mem
= da
.d_miniosz
= 1 << target
->bt_sshift
;
1323 da
.d_maxiosz
= INT_MAX
& ~(da
.d_miniosz
- 1);
1325 if (copy_to_user(arg
, &da
, sizeof(da
)))
1326 return -XFS_ERROR(EFAULT
);
1330 case XFS_IOC_FSBULKSTAT_SINGLE
:
1331 case XFS_IOC_FSBULKSTAT
:
1332 case XFS_IOC_FSINUMBERS
:
1333 return xfs_ioc_bulkstat(mp
, cmd
, arg
);
1335 case XFS_IOC_FSGEOMETRY_V1
:
1336 return xfs_ioc_fsgeometry_v1(mp
, arg
);
1338 case XFS_IOC_FSGEOMETRY
:
1339 return xfs_ioc_fsgeometry(mp
, arg
);
1341 case XFS_IOC_GETVERSION
:
1342 return put_user(inode
->i_generation
, (int __user
*)arg
);
1344 case XFS_IOC_FSGETXATTR
:
1345 return xfs_ioc_fsgetxattr(ip
, 0, arg
);
1346 case XFS_IOC_FSGETXATTRA
:
1347 return xfs_ioc_fsgetxattr(ip
, 1, arg
);
1348 case XFS_IOC_FSSETXATTR
:
1349 return xfs_ioc_fssetxattr(ip
, filp
, arg
);
1350 case XFS_IOC_GETXFLAGS
:
1351 return xfs_ioc_getxflags(ip
, arg
);
1352 case XFS_IOC_SETXFLAGS
:
1353 return xfs_ioc_setxflags(ip
, filp
, arg
);
1355 case XFS_IOC_FSSETDM
: {
1356 struct fsdmidata dmi
;
1358 if (copy_from_user(&dmi
, arg
, sizeof(dmi
)))
1359 return -XFS_ERROR(EFAULT
);
1361 error
= xfs_set_dmattrs(ip
, dmi
.fsd_dmevmask
,
1366 case XFS_IOC_GETBMAP
:
1367 case XFS_IOC_GETBMAPA
:
1368 return xfs_ioc_getbmap(ip
, ioflags
, cmd
, arg
);
1370 case XFS_IOC_GETBMAPX
:
1371 return xfs_ioc_getbmapx(ip
, arg
);
1373 case XFS_IOC_FD_TO_HANDLE
:
1374 case XFS_IOC_PATH_TO_HANDLE
:
1375 case XFS_IOC_PATH_TO_FSHANDLE
: {
1376 xfs_fsop_handlereq_t hreq
;
1378 if (copy_from_user(&hreq
, arg
, sizeof(hreq
)))
1379 return -XFS_ERROR(EFAULT
);
1380 return xfs_find_handle(cmd
, &hreq
);
1382 case XFS_IOC_OPEN_BY_HANDLE
: {
1383 xfs_fsop_handlereq_t hreq
;
1385 if (copy_from_user(&hreq
, arg
, sizeof(xfs_fsop_handlereq_t
)))
1386 return -XFS_ERROR(EFAULT
);
1387 return xfs_open_by_handle(filp
, &hreq
);
1389 case XFS_IOC_FSSETDM_BY_HANDLE
:
1390 return xfs_fssetdm_by_handle(filp
, arg
);
1392 case XFS_IOC_READLINK_BY_HANDLE
: {
1393 xfs_fsop_handlereq_t hreq
;
1395 if (copy_from_user(&hreq
, arg
, sizeof(xfs_fsop_handlereq_t
)))
1396 return -XFS_ERROR(EFAULT
);
1397 return xfs_readlink_by_handle(filp
, &hreq
);
1399 case XFS_IOC_ATTRLIST_BY_HANDLE
:
1400 return xfs_attrlist_by_handle(filp
, arg
);
1402 case XFS_IOC_ATTRMULTI_BY_HANDLE
:
1403 return xfs_attrmulti_by_handle(filp
, arg
);
1405 case XFS_IOC_SWAPEXT
: {
1406 struct xfs_swapext sxp
;
1408 if (copy_from_user(&sxp
, arg
, sizeof(xfs_swapext_t
)))
1409 return -XFS_ERROR(EFAULT
);
1410 error
= xfs_swapext(&sxp
);
1414 case XFS_IOC_FSCOUNTS
: {
1415 xfs_fsop_counts_t out
;
1417 error
= xfs_fs_counts(mp
, &out
);
1421 if (copy_to_user(arg
, &out
, sizeof(out
)))
1422 return -XFS_ERROR(EFAULT
);
1426 case XFS_IOC_SET_RESBLKS
: {
1427 xfs_fsop_resblks_t inout
;
1430 if (!capable(CAP_SYS_ADMIN
))
1433 if (copy_from_user(&inout
, arg
, sizeof(inout
)))
1434 return -XFS_ERROR(EFAULT
);
1436 /* input parameter is passed in resblks field of structure */
1438 error
= xfs_reserve_blocks(mp
, &in
, &inout
);
1442 if (copy_to_user(arg
, &inout
, sizeof(inout
)))
1443 return -XFS_ERROR(EFAULT
);
1447 case XFS_IOC_GET_RESBLKS
: {
1448 xfs_fsop_resblks_t out
;
1450 if (!capable(CAP_SYS_ADMIN
))
1453 error
= xfs_reserve_blocks(mp
, NULL
, &out
);
1457 if (copy_to_user(arg
, &out
, sizeof(out
)))
1458 return -XFS_ERROR(EFAULT
);
1463 case XFS_IOC_FSGROWFSDATA
: {
1464 xfs_growfs_data_t in
;
1466 if (copy_from_user(&in
, arg
, sizeof(in
)))
1467 return -XFS_ERROR(EFAULT
);
1469 error
= xfs_growfs_data(mp
, &in
);
1473 case XFS_IOC_FSGROWFSLOG
: {
1474 xfs_growfs_log_t in
;
1476 if (copy_from_user(&in
, arg
, sizeof(in
)))
1477 return -XFS_ERROR(EFAULT
);
1479 error
= xfs_growfs_log(mp
, &in
);
1483 case XFS_IOC_FSGROWFSRT
: {
1486 if (copy_from_user(&in
, arg
, sizeof(in
)))
1487 return -XFS_ERROR(EFAULT
);
1489 error
= xfs_growfs_rt(mp
, &in
);
1493 case XFS_IOC_GOINGDOWN
: {
1496 if (!capable(CAP_SYS_ADMIN
))
1499 if (get_user(in
, (__uint32_t __user
*)arg
))
1500 return -XFS_ERROR(EFAULT
);
1502 error
= xfs_fs_goingdown(mp
, in
);
1506 case XFS_IOC_ERROR_INJECTION
: {
1507 xfs_error_injection_t in
;
1509 if (!capable(CAP_SYS_ADMIN
))
1512 if (copy_from_user(&in
, arg
, sizeof(in
)))
1513 return -XFS_ERROR(EFAULT
);
1515 error
= xfs_errortag_add(in
.errtag
, mp
);
1519 case XFS_IOC_ERROR_CLEARALL
:
1520 if (!capable(CAP_SYS_ADMIN
))
1523 error
= xfs_errortag_clearall(mp
, 1);