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
)
82 memset((char *)&handle
, 0, sizeof(handle
));
85 case XFS_IOC_PATH_TO_FSHANDLE
:
86 case XFS_IOC_PATH_TO_HANDLE
: {
88 int error
= user_lpath((const char __user
*)hreq
->path
, &path
);
93 ASSERT(path
.dentry
->d_inode
);
94 inode
= igrab(path
.dentry
->d_inode
);
99 case XFS_IOC_FD_TO_HANDLE
: {
102 file
= fget(hreq
->fd
);
106 ASSERT(file
->f_path
.dentry
);
107 ASSERT(file
->f_path
.dentry
->d_inode
);
108 inode
= igrab(file
->f_path
.dentry
->d_inode
);
115 return -XFS_ERROR(EINVAL
);
118 if (inode
->i_sb
->s_magic
!= XFS_SB_MAGIC
) {
119 /* we're not in XFS anymore, Toto */
121 return -XFS_ERROR(EINVAL
);
124 switch (inode
->i_mode
& S_IFMT
) {
131 return -XFS_ERROR(EBADF
);
134 /* now we can grab the fsid */
135 memcpy(&handle
.ha_fsid
, XFS_I(inode
)->i_mount
->m_fixedfsid
,
137 hsize
= sizeof(xfs_fsid_t
);
139 if (cmd
!= XFS_IOC_PATH_TO_FSHANDLE
) {
140 xfs_inode_t
*ip
= XFS_I(inode
);
143 /* need to get access to the xfs_inode to read the generation */
144 lock_mode
= xfs_ilock_map_shared(ip
);
146 /* fill in fid section of handle from inode */
147 handle
.ha_fid
.fid_len
= sizeof(xfs_fid_t
) -
148 sizeof(handle
.ha_fid
.fid_len
);
149 handle
.ha_fid
.fid_pad
= 0;
150 handle
.ha_fid
.fid_gen
= ip
->i_d
.di_gen
;
151 handle
.ha_fid
.fid_ino
= ip
->i_ino
;
153 xfs_iunlock_map_shared(ip
, lock_mode
);
155 hsize
= XFS_HSIZE(handle
);
158 /* now copy our handle into the user buffer & write out the size */
159 if (copy_to_user(hreq
->ohandle
, &handle
, hsize
) ||
160 copy_to_user(hreq
->ohandlen
, &hsize
, sizeof(__s32
))) {
162 return -XFS_ERROR(EFAULT
);
170 * No need to do permission checks on the various pathname components
171 * as the handle operations are privileged.
174 xfs_handle_acceptable(
176 struct dentry
*dentry
)
182 * Convert userspace handle data into a dentry.
185 xfs_handle_to_dentry(
186 struct file
*parfilp
,
187 void __user
*uhandle
,
191 struct xfs_fid64 fid
;
194 * Only allow handle opens under a directory.
196 if (!S_ISDIR(parfilp
->f_path
.dentry
->d_inode
->i_mode
))
197 return ERR_PTR(-ENOTDIR
);
199 if (hlen
!= sizeof(xfs_handle_t
))
200 return ERR_PTR(-EINVAL
);
201 if (copy_from_user(&handle
, uhandle
, hlen
))
202 return ERR_PTR(-EFAULT
);
203 if (handle
.ha_fid
.fid_len
!=
204 sizeof(handle
.ha_fid
) - sizeof(handle
.ha_fid
.fid_len
))
205 return ERR_PTR(-EINVAL
);
207 memset(&fid
, 0, sizeof(struct fid
));
208 fid
.ino
= handle
.ha_fid
.fid_ino
;
209 fid
.gen
= handle
.ha_fid
.fid_gen
;
211 return exportfs_decode_fh(parfilp
->f_path
.mnt
, (struct fid
*)&fid
, 3,
212 FILEID_INO32_GEN
| XFS_FILEID_TYPE_64FLAG
,
213 xfs_handle_acceptable
, NULL
);
216 STATIC
struct dentry
*
217 xfs_handlereq_to_dentry(
218 struct file
*parfilp
,
219 xfs_fsop_handlereq_t
*hreq
)
221 return xfs_handle_to_dentry(parfilp
, hreq
->ihandle
, hreq
->ihandlen
);
226 struct file
*parfilp
,
227 xfs_fsop_handlereq_t
*hreq
)
229 const struct cred
*cred
= current_cred();
235 struct dentry
*dentry
;
237 if (!capable(CAP_SYS_ADMIN
))
238 return -XFS_ERROR(EPERM
);
240 dentry
= xfs_handlereq_to_dentry(parfilp
, hreq
);
242 return PTR_ERR(dentry
);
243 inode
= dentry
->d_inode
;
245 /* Restrict xfs_open_by_handle to directories & regular files. */
246 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
))) {
247 error
= -XFS_ERROR(EPERM
);
251 #if BITS_PER_LONG != 32
252 hreq
->oflags
|= O_LARGEFILE
;
255 /* Put open permission in namei format. */
256 permflag
= hreq
->oflags
;
257 if ((permflag
+1) & O_ACCMODE
)
259 if (permflag
& O_TRUNC
)
262 if ((!(permflag
& O_APPEND
) || (permflag
& O_TRUNC
)) &&
263 (permflag
& FMODE_WRITE
) && IS_APPEND(inode
)) {
264 error
= -XFS_ERROR(EPERM
);
268 if ((permflag
& FMODE_WRITE
) && IS_IMMUTABLE(inode
)) {
269 error
= -XFS_ERROR(EACCES
);
273 /* Can't write directories. */
274 if (S_ISDIR(inode
->i_mode
) && (permflag
& FMODE_WRITE
)) {
275 error
= -XFS_ERROR(EISDIR
);
279 fd
= get_unused_fd();
285 filp
= dentry_open(dentry
, mntget(parfilp
->f_path
.mnt
),
289 return PTR_ERR(filp
);
292 if (inode
->i_mode
& S_IFREG
) {
293 filp
->f_flags
|= O_NOATIME
;
294 filp
->f_mode
|= FMODE_NOCMTIME
;
297 fd_install(fd
, filp
);
306 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
307 * unused first argument.
322 if (len
> (unsigned) buflen
)
324 if (copy_to_user(buffer
, link
, len
))
332 xfs_readlink_by_handle(
333 struct file
*parfilp
,
334 xfs_fsop_handlereq_t
*hreq
)
336 struct dentry
*dentry
;
341 if (!capable(CAP_SYS_ADMIN
))
342 return -XFS_ERROR(EPERM
);
344 dentry
= xfs_handlereq_to_dentry(parfilp
, hreq
);
346 return PTR_ERR(dentry
);
348 /* Restrict this handle operation to symlinks only. */
349 if (!S_ISLNK(dentry
->d_inode
->i_mode
)) {
350 error
= -XFS_ERROR(EINVAL
);
354 if (copy_from_user(&olen
, hreq
->ohandlen
, sizeof(__u32
))) {
355 error
= -XFS_ERROR(EFAULT
);
359 link
= kmalloc(MAXPATHLEN
+1, GFP_KERNEL
);
361 error
= -XFS_ERROR(ENOMEM
);
365 error
= -xfs_readlink(XFS_I(dentry
->d_inode
), link
);
368 error
= do_readlink(hreq
->ohandle
, olen
, link
);
380 xfs_fssetdm_by_handle(
381 struct file
*parfilp
,
385 struct fsdmidata fsd
;
386 xfs_fsop_setdm_handlereq_t dmhreq
;
387 struct dentry
*dentry
;
389 if (!capable(CAP_MKNOD
))
390 return -XFS_ERROR(EPERM
);
391 if (copy_from_user(&dmhreq
, arg
, sizeof(xfs_fsop_setdm_handlereq_t
)))
392 return -XFS_ERROR(EFAULT
);
394 dentry
= xfs_handlereq_to_dentry(parfilp
, &dmhreq
.hreq
);
396 return PTR_ERR(dentry
);
398 if (IS_IMMUTABLE(dentry
->d_inode
) || IS_APPEND(dentry
->d_inode
)) {
399 error
= -XFS_ERROR(EPERM
);
403 if (copy_from_user(&fsd
, dmhreq
.data
, sizeof(fsd
))) {
404 error
= -XFS_ERROR(EFAULT
);
408 error
= -xfs_set_dmattrs(XFS_I(dentry
->d_inode
), fsd
.fsd_dmevmask
,
417 xfs_attrlist_by_handle(
418 struct file
*parfilp
,
422 attrlist_cursor_kern_t
*cursor
;
423 xfs_fsop_attrlist_handlereq_t al_hreq
;
424 struct dentry
*dentry
;
427 if (!capable(CAP_SYS_ADMIN
))
428 return -XFS_ERROR(EPERM
);
429 if (copy_from_user(&al_hreq
, arg
, sizeof(xfs_fsop_attrlist_handlereq_t
)))
430 return -XFS_ERROR(EFAULT
);
431 if (al_hreq
.buflen
> XATTR_LIST_MAX
)
432 return -XFS_ERROR(EINVAL
);
435 * Reject flags, only allow namespaces.
437 if (al_hreq
.flags
& ~(ATTR_ROOT
| ATTR_SECURE
))
438 return -XFS_ERROR(EINVAL
);
440 dentry
= xfs_handlereq_to_dentry(parfilp
, &al_hreq
.hreq
);
442 return PTR_ERR(dentry
);
444 kbuf
= kmalloc(al_hreq
.buflen
, GFP_KERNEL
);
448 cursor
= (attrlist_cursor_kern_t
*)&al_hreq
.pos
;
449 error
= -xfs_attr_list(XFS_I(dentry
->d_inode
), kbuf
, al_hreq
.buflen
,
450 al_hreq
.flags
, cursor
);
454 if (copy_to_user(al_hreq
.buffer
, kbuf
, al_hreq
.buflen
))
465 xfs_attrmulti_attr_get(
475 if (*len
> XATTR_SIZE_MAX
)
477 kbuf
= kmalloc(*len
, GFP_KERNEL
);
481 error
= xfs_attr_get(XFS_I(inode
), name
, kbuf
, (int *)len
, flags
);
485 if (copy_to_user(ubuf
, kbuf
, *len
))
494 xfs_attrmulti_attr_set(
497 const char __user
*ubuf
,
504 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
506 if (len
> XATTR_SIZE_MAX
)
509 kbuf
= kmalloc(len
, GFP_KERNEL
);
513 if (copy_from_user(kbuf
, ubuf
, len
))
516 error
= xfs_attr_set(XFS_I(inode
), name
, kbuf
, len
, flags
);
524 xfs_attrmulti_attr_remove(
529 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
531 return xfs_attr_remove(XFS_I(inode
), name
, flags
);
535 xfs_attrmulti_by_handle(
536 struct file
*parfilp
,
540 xfs_attr_multiop_t
*ops
;
541 xfs_fsop_attrmulti_handlereq_t am_hreq
;
542 struct dentry
*dentry
;
543 unsigned int i
, size
;
546 if (!capable(CAP_SYS_ADMIN
))
547 return -XFS_ERROR(EPERM
);
548 if (copy_from_user(&am_hreq
, arg
, sizeof(xfs_fsop_attrmulti_handlereq_t
)))
549 return -XFS_ERROR(EFAULT
);
551 dentry
= xfs_handlereq_to_dentry(parfilp
, &am_hreq
.hreq
);
553 return PTR_ERR(dentry
);
556 size
= am_hreq
.opcount
* sizeof(xfs_attr_multiop_t
);
557 if (!size
|| size
> 16 * PAGE_SIZE
)
561 ops
= kmalloc(size
, GFP_KERNEL
);
566 if (copy_from_user(ops
, am_hreq
.ops
, size
))
569 attr_name
= kmalloc(MAXNAMELEN
, GFP_KERNEL
);
575 for (i
= 0; i
< am_hreq
.opcount
; i
++) {
576 ops
[i
].am_error
= strncpy_from_user(attr_name
,
577 ops
[i
].am_attrname
, MAXNAMELEN
);
578 if (ops
[i
].am_error
== 0 || ops
[i
].am_error
== MAXNAMELEN
)
580 if (ops
[i
].am_error
< 0)
583 switch (ops
[i
].am_opcode
) {
585 ops
[i
].am_error
= xfs_attrmulti_attr_get(
586 dentry
->d_inode
, attr_name
,
587 ops
[i
].am_attrvalue
, &ops
[i
].am_length
,
591 ops
[i
].am_error
= mnt_want_write(parfilp
->f_path
.mnt
);
594 ops
[i
].am_error
= xfs_attrmulti_attr_set(
595 dentry
->d_inode
, attr_name
,
596 ops
[i
].am_attrvalue
, ops
[i
].am_length
,
598 mnt_drop_write(parfilp
->f_path
.mnt
);
601 ops
[i
].am_error
= mnt_want_write(parfilp
->f_path
.mnt
);
604 ops
[i
].am_error
= xfs_attrmulti_attr_remove(
605 dentry
->d_inode
, attr_name
,
607 mnt_drop_write(parfilp
->f_path
.mnt
);
610 ops
[i
].am_error
= EINVAL
;
614 if (copy_to_user(am_hreq
.ops
, ops
, size
))
615 error
= XFS_ERROR(EFAULT
);
627 struct xfs_inode
*ip
,
638 * Only allow the sys admin to reserve space unless
639 * unwritten extents are enabled.
641 if (!xfs_sb_version_hasextflgbit(&ip
->i_mount
->m_sb
) &&
642 !capable(CAP_SYS_ADMIN
))
643 return -XFS_ERROR(EPERM
);
645 if (inode
->i_flags
& (S_IMMUTABLE
|S_APPEND
))
646 return -XFS_ERROR(EPERM
);
648 if (!(filp
->f_mode
& FMODE_WRITE
))
649 return -XFS_ERROR(EBADF
);
651 if (!S_ISREG(inode
->i_mode
))
652 return -XFS_ERROR(EINVAL
);
654 if (filp
->f_flags
& (O_NDELAY
|O_NONBLOCK
))
655 attr_flags
|= XFS_ATTR_NONBLOCK
;
656 if (ioflags
& IO_INVIS
)
657 attr_flags
|= XFS_ATTR_DMI
;
659 error
= xfs_change_file_space(ip
, cmd
, bf
, filp
->f_pos
, attr_flags
);
669 xfs_fsop_bulkreq_t bulkreq
;
670 int count
; /* # of records returned */
671 xfs_ino_t inlast
; /* last inode number */
675 /* done = 1 if there are more stats to get and if bulkstat */
676 /* should be called again (unused here, but used in dmapi) */
678 if (!capable(CAP_SYS_ADMIN
))
681 if (XFS_FORCED_SHUTDOWN(mp
))
682 return -XFS_ERROR(EIO
);
684 if (copy_from_user(&bulkreq
, arg
, sizeof(xfs_fsop_bulkreq_t
)))
685 return -XFS_ERROR(EFAULT
);
687 if (copy_from_user(&inlast
, bulkreq
.lastip
, sizeof(__s64
)))
688 return -XFS_ERROR(EFAULT
);
690 if ((count
= bulkreq
.icount
) <= 0)
691 return -XFS_ERROR(EINVAL
);
693 if (bulkreq
.ubuffer
== NULL
)
694 return -XFS_ERROR(EINVAL
);
696 if (cmd
== XFS_IOC_FSINUMBERS
)
697 error
= xfs_inumbers(mp
, &inlast
, &count
,
698 bulkreq
.ubuffer
, xfs_inumbers_fmt
);
699 else if (cmd
== XFS_IOC_FSBULKSTAT_SINGLE
)
700 error
= xfs_bulkstat_single(mp
, &inlast
,
701 bulkreq
.ubuffer
, &done
);
702 else /* XFS_IOC_FSBULKSTAT */
703 error
= xfs_bulkstat(mp
, &inlast
, &count
,
704 (bulkstat_one_pf
)xfs_bulkstat_one
, NULL
,
705 sizeof(xfs_bstat_t
), bulkreq
.ubuffer
,
706 BULKSTAT_FG_QUICK
, &done
);
711 if (bulkreq
.ocount
!= NULL
) {
712 if (copy_to_user(bulkreq
.lastip
, &inlast
,
714 return -XFS_ERROR(EFAULT
);
716 if (copy_to_user(bulkreq
.ocount
, &count
, sizeof(count
)))
717 return -XFS_ERROR(EFAULT
);
724 xfs_ioc_fsgeometry_v1(
728 xfs_fsop_geom_v1_t fsgeo
;
731 error
= xfs_fs_geometry(mp
, (xfs_fsop_geom_t
*)&fsgeo
, 3);
735 if (copy_to_user(arg
, &fsgeo
, sizeof(fsgeo
)))
736 return -XFS_ERROR(EFAULT
);
745 xfs_fsop_geom_t fsgeo
;
748 error
= xfs_fs_geometry(mp
, &fsgeo
, 4);
752 if (copy_to_user(arg
, &fsgeo
, sizeof(fsgeo
)))
753 return -XFS_ERROR(EFAULT
);
758 * Linux extended inode flags interface.
762 xfs_merge_ioc_xflags(
766 unsigned int xflags
= start
;
768 if (flags
& FS_IMMUTABLE_FL
)
769 xflags
|= XFS_XFLAG_IMMUTABLE
;
771 xflags
&= ~XFS_XFLAG_IMMUTABLE
;
772 if (flags
& FS_APPEND_FL
)
773 xflags
|= XFS_XFLAG_APPEND
;
775 xflags
&= ~XFS_XFLAG_APPEND
;
776 if (flags
& FS_SYNC_FL
)
777 xflags
|= XFS_XFLAG_SYNC
;
779 xflags
&= ~XFS_XFLAG_SYNC
;
780 if (flags
& FS_NOATIME_FL
)
781 xflags
|= XFS_XFLAG_NOATIME
;
783 xflags
&= ~XFS_XFLAG_NOATIME
;
784 if (flags
& FS_NODUMP_FL
)
785 xflags
|= XFS_XFLAG_NODUMP
;
787 xflags
&= ~XFS_XFLAG_NODUMP
;
796 unsigned int flags
= 0;
798 if (di_flags
& XFS_DIFLAG_IMMUTABLE
)
799 flags
|= FS_IMMUTABLE_FL
;
800 if (di_flags
& XFS_DIFLAG_APPEND
)
801 flags
|= FS_APPEND_FL
;
802 if (di_flags
& XFS_DIFLAG_SYNC
)
804 if (di_flags
& XFS_DIFLAG_NOATIME
)
805 flags
|= FS_NOATIME_FL
;
806 if (di_flags
& XFS_DIFLAG_NODUMP
)
807 flags
|= FS_NODUMP_FL
;
819 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
820 fa
.fsx_xflags
= xfs_ip2xflags(ip
);
821 fa
.fsx_extsize
= ip
->i_d
.di_extsize
<< ip
->i_mount
->m_sb
.sb_blocklog
;
822 fa
.fsx_projid
= ip
->i_d
.di_projid
;
826 if (ip
->i_afp
->if_flags
& XFS_IFEXTENTS
)
827 fa
.fsx_nextents
= ip
->i_afp
->if_bytes
/
828 sizeof(xfs_bmbt_rec_t
);
830 fa
.fsx_nextents
= ip
->i_d
.di_anextents
;
834 if (ip
->i_df
.if_flags
& XFS_IFEXTENTS
)
835 fa
.fsx_nextents
= ip
->i_df
.if_bytes
/
836 sizeof(xfs_bmbt_rec_t
);
838 fa
.fsx_nextents
= ip
->i_d
.di_nextents
;
840 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
842 if (copy_to_user(arg
, &fa
, sizeof(fa
)))
849 struct xfs_inode
*ip
,
852 unsigned int di_flags
;
854 /* can't set PREALLOC this way, just preserve it */
855 di_flags
= (ip
->i_d
.di_flags
& XFS_DIFLAG_PREALLOC
);
856 if (xflags
& XFS_XFLAG_IMMUTABLE
)
857 di_flags
|= XFS_DIFLAG_IMMUTABLE
;
858 if (xflags
& XFS_XFLAG_APPEND
)
859 di_flags
|= XFS_DIFLAG_APPEND
;
860 if (xflags
& XFS_XFLAG_SYNC
)
861 di_flags
|= XFS_DIFLAG_SYNC
;
862 if (xflags
& XFS_XFLAG_NOATIME
)
863 di_flags
|= XFS_DIFLAG_NOATIME
;
864 if (xflags
& XFS_XFLAG_NODUMP
)
865 di_flags
|= XFS_DIFLAG_NODUMP
;
866 if (xflags
& XFS_XFLAG_PROJINHERIT
)
867 di_flags
|= XFS_DIFLAG_PROJINHERIT
;
868 if (xflags
& XFS_XFLAG_NODEFRAG
)
869 di_flags
|= XFS_DIFLAG_NODEFRAG
;
870 if (xflags
& XFS_XFLAG_FILESTREAM
)
871 di_flags
|= XFS_DIFLAG_FILESTREAM
;
872 if ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFDIR
) {
873 if (xflags
& XFS_XFLAG_RTINHERIT
)
874 di_flags
|= XFS_DIFLAG_RTINHERIT
;
875 if (xflags
& XFS_XFLAG_NOSYMLINKS
)
876 di_flags
|= XFS_DIFLAG_NOSYMLINKS
;
877 if (xflags
& XFS_XFLAG_EXTSZINHERIT
)
878 di_flags
|= XFS_DIFLAG_EXTSZINHERIT
;
879 } else if ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
) {
880 if (xflags
& XFS_XFLAG_REALTIME
)
881 di_flags
|= XFS_DIFLAG_REALTIME
;
882 if (xflags
& XFS_XFLAG_EXTSIZE
)
883 di_flags
|= XFS_DIFLAG_EXTSIZE
;
886 ip
->i_d
.di_flags
= di_flags
;
890 xfs_diflags_to_linux(
891 struct xfs_inode
*ip
)
893 struct inode
*inode
= VFS_I(ip
);
894 unsigned int xflags
= xfs_ip2xflags(ip
);
896 if (xflags
& XFS_XFLAG_IMMUTABLE
)
897 inode
->i_flags
|= S_IMMUTABLE
;
899 inode
->i_flags
&= ~S_IMMUTABLE
;
900 if (xflags
& XFS_XFLAG_APPEND
)
901 inode
->i_flags
|= S_APPEND
;
903 inode
->i_flags
&= ~S_APPEND
;
904 if (xflags
& XFS_XFLAG_SYNC
)
905 inode
->i_flags
|= S_SYNC
;
907 inode
->i_flags
&= ~S_SYNC
;
908 if (xflags
& XFS_XFLAG_NOATIME
)
909 inode
->i_flags
|= S_NOATIME
;
911 inode
->i_flags
&= ~S_NOATIME
;
915 #define FSX_EXTSIZE 2
917 #define FSX_NONBLOCK 8
925 struct xfs_mount
*mp
= ip
->i_mount
;
926 struct xfs_trans
*tp
;
927 unsigned int lock_flags
= 0;
928 struct xfs_dquot
*udqp
= NULL
, *gdqp
= NULL
;
929 struct xfs_dquot
*olddquot
= NULL
;
932 xfs_itrace_entry(ip
);
934 if (mp
->m_flags
& XFS_MOUNT_RDONLY
)
935 return XFS_ERROR(EROFS
);
936 if (XFS_FORCED_SHUTDOWN(mp
))
937 return XFS_ERROR(EIO
);
940 * If disk quotas is on, we make sure that the dquots do exist on disk,
941 * before we start any other transactions. Trying to do this later
942 * is messy. We don't care to take a readlock to look at the ids
943 * in inode here, because we can't hold it across the trans_reserve.
944 * If the IDs do change before we take the ilock, we're covered
945 * because the i_*dquot fields will get updated anyway.
947 if (XFS_IS_QUOTA_ON(mp
) && (mask
& FSX_PROJID
)) {
948 code
= XFS_QM_DQVOPALLOC(mp
, ip
, ip
->i_d
.di_uid
,
949 ip
->i_d
.di_gid
, fa
->fsx_projid
,
950 XFS_QMOPT_PQUOTA
, &udqp
, &gdqp
);
956 * For the other attributes, we acquire the inode lock and
957 * first do an error checking pass.
959 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SETATTR_NOT_SIZE
);
960 code
= xfs_trans_reserve(tp
, 0, XFS_ICHANGE_LOG_RES(mp
), 0, 0, 0);
964 lock_flags
= XFS_ILOCK_EXCL
;
965 xfs_ilock(ip
, lock_flags
);
968 * CAP_FOWNER overrides the following restrictions:
970 * The user ID of the calling process must be equal
971 * to the file owner ID, except in cases where the
972 * CAP_FSETID capability is applicable.
974 if (current_fsuid() != ip
->i_d
.di_uid
&& !capable(CAP_FOWNER
)) {
975 code
= XFS_ERROR(EPERM
);
980 * Do a quota reservation only if projid is actually going to change.
982 if (mask
& FSX_PROJID
) {
983 if (XFS_IS_PQUOTA_ON(mp
) &&
984 ip
->i_d
.di_projid
!= fa
->fsx_projid
) {
986 code
= XFS_QM_DQVOPCHOWNRESV(mp
, tp
, ip
, udqp
, gdqp
,
987 capable(CAP_FOWNER
) ?
988 XFS_QMOPT_FORCE_RES
: 0);
989 if (code
) /* out of quota */
994 if (mask
& FSX_EXTSIZE
) {
996 * Can't change extent size if any extents are allocated.
998 if (ip
->i_d
.di_nextents
&&
999 ((ip
->i_d
.di_extsize
<< mp
->m_sb
.sb_blocklog
) !=
1001 code
= XFS_ERROR(EINVAL
); /* EFBIG? */
1006 * Extent size must be a multiple of the appropriate block
1007 * size, if set at all.
1009 if (fa
->fsx_extsize
!= 0) {
1012 if (XFS_IS_REALTIME_INODE(ip
) ||
1013 ((mask
& FSX_XFLAGS
) &&
1014 (fa
->fsx_xflags
& XFS_XFLAG_REALTIME
))) {
1015 size
= mp
->m_sb
.sb_rextsize
<<
1016 mp
->m_sb
.sb_blocklog
;
1018 size
= mp
->m_sb
.sb_blocksize
;
1021 if (fa
->fsx_extsize
% size
) {
1022 code
= XFS_ERROR(EINVAL
);
1029 if (mask
& FSX_XFLAGS
) {
1031 * Can't change realtime flag if any extents are allocated.
1033 if ((ip
->i_d
.di_nextents
|| ip
->i_delayed_blks
) &&
1034 (XFS_IS_REALTIME_INODE(ip
)) !=
1035 (fa
->fsx_xflags
& XFS_XFLAG_REALTIME
)) {
1036 code
= XFS_ERROR(EINVAL
); /* EFBIG? */
1041 * If realtime flag is set then must have realtime data.
1043 if ((fa
->fsx_xflags
& XFS_XFLAG_REALTIME
)) {
1044 if ((mp
->m_sb
.sb_rblocks
== 0) ||
1045 (mp
->m_sb
.sb_rextsize
== 0) ||
1046 (ip
->i_d
.di_extsize
% mp
->m_sb
.sb_rextsize
)) {
1047 code
= XFS_ERROR(EINVAL
);
1053 * Can't modify an immutable/append-only file unless
1054 * we have appropriate permission.
1056 if ((ip
->i_d
.di_flags
&
1057 (XFS_DIFLAG_IMMUTABLE
|XFS_DIFLAG_APPEND
) ||
1059 (XFS_XFLAG_IMMUTABLE
| XFS_XFLAG_APPEND
))) &&
1060 !capable(CAP_LINUX_IMMUTABLE
)) {
1061 code
= XFS_ERROR(EPERM
);
1066 xfs_trans_ijoin(tp
, ip
, lock_flags
);
1067 xfs_trans_ihold(tp
, ip
);
1070 * Change file ownership. Must be the owner or privileged.
1072 if (mask
& FSX_PROJID
) {
1074 * CAP_FSETID overrides the following restrictions:
1076 * The set-user-ID and set-group-ID bits of a file will be
1077 * cleared upon successful return from chown()
1079 if ((ip
->i_d
.di_mode
& (S_ISUID
|S_ISGID
)) &&
1080 !capable(CAP_FSETID
))
1081 ip
->i_d
.di_mode
&= ~(S_ISUID
|S_ISGID
);
1084 * Change the ownerships and register quota modifications
1085 * in the transaction.
1087 if (ip
->i_d
.di_projid
!= fa
->fsx_projid
) {
1088 if (XFS_IS_PQUOTA_ON(mp
)) {
1089 olddquot
= XFS_QM_DQVOPCHOWN(mp
, tp
, ip
,
1090 &ip
->i_gdquot
, gdqp
);
1092 ip
->i_d
.di_projid
= fa
->fsx_projid
;
1095 * We may have to rev the inode as well as
1096 * the superblock version number since projids didn't
1097 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1099 if (ip
->i_d
.di_version
== 1)
1100 xfs_bump_ino_vers2(tp
, ip
);
1105 if (mask
& FSX_EXTSIZE
)
1106 ip
->i_d
.di_extsize
= fa
->fsx_extsize
>> mp
->m_sb
.sb_blocklog
;
1107 if (mask
& FSX_XFLAGS
) {
1108 xfs_set_diflags(ip
, fa
->fsx_xflags
);
1109 xfs_diflags_to_linux(ip
);
1112 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1113 xfs_ichgtime(ip
, XFS_ICHGTIME_CHG
);
1115 XFS_STATS_INC(xs_ig_attrchg
);
1118 * If this is a synchronous mount, make sure that the
1119 * transaction goes to disk before returning to the user.
1120 * This is slightly sub-optimal in that truncates require
1121 * two sync transactions instead of one for wsync filesystems.
1122 * One for the truncate and one for the timestamps since we
1123 * don't want to change the timestamps unless we're sure the
1124 * truncate worked. Truncates are less than 1% of the laddis
1125 * mix so this probably isn't worth the trouble to optimize.
1127 if (mp
->m_flags
& XFS_MOUNT_WSYNC
)
1128 xfs_trans_set_sync(tp
);
1129 code
= xfs_trans_commit(tp
, 0);
1130 xfs_iunlock(ip
, lock_flags
);
1133 * Release any dquot(s) the inode had kept before chown.
1135 XFS_QM_DQRELE(mp
, olddquot
);
1136 XFS_QM_DQRELE(mp
, udqp
);
1137 XFS_QM_DQRELE(mp
, gdqp
);
1142 if (DM_EVENT_ENABLED(ip
, DM_EVENT_ATTRIBUTE
)) {
1143 XFS_SEND_NAMESP(mp
, DM_EVENT_ATTRIBUTE
, ip
, DM_RIGHT_NULL
,
1144 NULL
, DM_RIGHT_NULL
, NULL
, NULL
, 0, 0,
1145 (mask
& FSX_NONBLOCK
) ? DM_FLAGS_NDELAY
: 0);
1151 XFS_QM_DQRELE(mp
, udqp
);
1152 XFS_QM_DQRELE(mp
, gdqp
);
1153 xfs_trans_cancel(tp
, 0);
1155 xfs_iunlock(ip
, lock_flags
);
1168 if (copy_from_user(&fa
, arg
, sizeof(fa
)))
1171 mask
= FSX_XFLAGS
| FSX_EXTSIZE
| FSX_PROJID
;
1172 if (filp
->f_flags
& (O_NDELAY
|O_NONBLOCK
))
1173 mask
|= FSX_NONBLOCK
;
1175 return -xfs_ioctl_setattr(ip
, &fa
, mask
);
1185 flags
= xfs_di2lxflags(ip
->i_d
.di_flags
);
1186 if (copy_to_user(arg
, &flags
, sizeof(flags
)))
1201 if (copy_from_user(&flags
, arg
, sizeof(flags
)))
1204 if (flags
& ~(FS_IMMUTABLE_FL
| FS_APPEND_FL
| \
1205 FS_NOATIME_FL
| FS_NODUMP_FL
| \
1210 if (filp
->f_flags
& (O_NDELAY
|O_NONBLOCK
))
1211 mask
|= FSX_NONBLOCK
;
1212 fa
.fsx_xflags
= xfs_merge_ioc_xflags(flags
, xfs_ip2xflags(ip
));
1214 return -xfs_ioctl_setattr(ip
, &fa
, mask
);
1218 xfs_getbmap_format(void **ap
, struct getbmapx
*bmv
, int *full
)
1220 struct getbmap __user
*base
= *ap
;
1222 /* copy only getbmap portion (not getbmapx) */
1223 if (copy_to_user(base
, bmv
, sizeof(struct getbmap
)))
1224 return XFS_ERROR(EFAULT
);
1226 *ap
+= sizeof(struct getbmap
);
1232 struct xfs_inode
*ip
,
1237 struct getbmapx bmx
;
1240 if (copy_from_user(&bmx
, arg
, sizeof(struct getbmapx
)))
1241 return -XFS_ERROR(EFAULT
);
1243 if (bmx
.bmv_count
< 2)
1244 return -XFS_ERROR(EINVAL
);
1246 bmx
.bmv_iflags
= (cmd
== XFS_IOC_GETBMAPA
? BMV_IF_ATTRFORK
: 0);
1247 if (ioflags
& IO_INVIS
)
1248 bmx
.bmv_iflags
|= BMV_IF_NO_DMAPI_READ
;
1250 error
= xfs_getbmap(ip
, &bmx
, xfs_getbmap_format
,
1251 (struct getbmap
*)arg
+1);
1255 /* copy back header - only size of getbmap */
1256 if (copy_to_user(arg
, &bmx
, sizeof(struct getbmap
)))
1257 return -XFS_ERROR(EFAULT
);
1262 xfs_getbmapx_format(void **ap
, struct getbmapx
*bmv
, int *full
)
1264 struct getbmapx __user
*base
= *ap
;
1266 if (copy_to_user(base
, bmv
, sizeof(struct getbmapx
)))
1267 return XFS_ERROR(EFAULT
);
1269 *ap
+= sizeof(struct getbmapx
);
1275 struct xfs_inode
*ip
,
1278 struct getbmapx bmx
;
1281 if (copy_from_user(&bmx
, arg
, sizeof(bmx
)))
1282 return -XFS_ERROR(EFAULT
);
1284 if (bmx
.bmv_count
< 2)
1285 return -XFS_ERROR(EINVAL
);
1287 if (bmx
.bmv_iflags
& (~BMV_IF_VALID
))
1288 return -XFS_ERROR(EINVAL
);
1290 error
= xfs_getbmap(ip
, &bmx
, xfs_getbmapx_format
,
1291 (struct getbmapx
*)arg
+1);
1295 /* copy back header */
1296 if (copy_to_user(arg
, &bmx
, sizeof(struct getbmapx
)))
1297 return -XFS_ERROR(EFAULT
);
1303 * Note: some of the ioctl's return positive numbers as a
1304 * byte count indicating success, such as readlink_by_handle.
1305 * So we don't "sign flip" like most other routines. This means
1306 * true errors need to be returned as a negative value.
1314 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
1315 struct xfs_inode
*ip
= XFS_I(inode
);
1316 struct xfs_mount
*mp
= ip
->i_mount
;
1317 void __user
*arg
= (void __user
*)p
;
1321 if (filp
->f_mode
& FMODE_NOCMTIME
)
1322 ioflags
|= IO_INVIS
;
1324 xfs_itrace_entry(ip
);
1327 case XFS_IOC_ALLOCSP
:
1328 case XFS_IOC_FREESP
:
1329 case XFS_IOC_RESVSP
:
1330 case XFS_IOC_UNRESVSP
:
1331 case XFS_IOC_ALLOCSP64
:
1332 case XFS_IOC_FREESP64
:
1333 case XFS_IOC_RESVSP64
:
1334 case XFS_IOC_UNRESVSP64
: {
1337 if (copy_from_user(&bf
, arg
, sizeof(bf
)))
1338 return -XFS_ERROR(EFAULT
);
1339 return xfs_ioc_space(ip
, inode
, filp
, ioflags
, cmd
, &bf
);
1341 case XFS_IOC_DIOINFO
: {
1343 xfs_buftarg_t
*target
=
1344 XFS_IS_REALTIME_INODE(ip
) ?
1345 mp
->m_rtdev_targp
: mp
->m_ddev_targp
;
1347 da
.d_mem
= da
.d_miniosz
= 1 << target
->bt_sshift
;
1348 da
.d_maxiosz
= INT_MAX
& ~(da
.d_miniosz
- 1);
1350 if (copy_to_user(arg
, &da
, sizeof(da
)))
1351 return -XFS_ERROR(EFAULT
);
1355 case XFS_IOC_FSBULKSTAT_SINGLE
:
1356 case XFS_IOC_FSBULKSTAT
:
1357 case XFS_IOC_FSINUMBERS
:
1358 return xfs_ioc_bulkstat(mp
, cmd
, arg
);
1360 case XFS_IOC_FSGEOMETRY_V1
:
1361 return xfs_ioc_fsgeometry_v1(mp
, arg
);
1363 case XFS_IOC_FSGEOMETRY
:
1364 return xfs_ioc_fsgeometry(mp
, arg
);
1366 case XFS_IOC_GETVERSION
:
1367 return put_user(inode
->i_generation
, (int __user
*)arg
);
1369 case XFS_IOC_FSGETXATTR
:
1370 return xfs_ioc_fsgetxattr(ip
, 0, arg
);
1371 case XFS_IOC_FSGETXATTRA
:
1372 return xfs_ioc_fsgetxattr(ip
, 1, arg
);
1373 case XFS_IOC_FSSETXATTR
:
1374 return xfs_ioc_fssetxattr(ip
, filp
, arg
);
1375 case XFS_IOC_GETXFLAGS
:
1376 return xfs_ioc_getxflags(ip
, arg
);
1377 case XFS_IOC_SETXFLAGS
:
1378 return xfs_ioc_setxflags(ip
, filp
, arg
);
1380 case XFS_IOC_FSSETDM
: {
1381 struct fsdmidata dmi
;
1383 if (copy_from_user(&dmi
, arg
, sizeof(dmi
)))
1384 return -XFS_ERROR(EFAULT
);
1386 error
= xfs_set_dmattrs(ip
, dmi
.fsd_dmevmask
,
1391 case XFS_IOC_GETBMAP
:
1392 case XFS_IOC_GETBMAPA
:
1393 return xfs_ioc_getbmap(ip
, ioflags
, cmd
, arg
);
1395 case XFS_IOC_GETBMAPX
:
1396 return xfs_ioc_getbmapx(ip
, arg
);
1398 case XFS_IOC_FD_TO_HANDLE
:
1399 case XFS_IOC_PATH_TO_HANDLE
:
1400 case XFS_IOC_PATH_TO_FSHANDLE
: {
1401 xfs_fsop_handlereq_t hreq
;
1403 if (copy_from_user(&hreq
, arg
, sizeof(hreq
)))
1404 return -XFS_ERROR(EFAULT
);
1405 return xfs_find_handle(cmd
, &hreq
);
1407 case XFS_IOC_OPEN_BY_HANDLE
: {
1408 xfs_fsop_handlereq_t hreq
;
1410 if (copy_from_user(&hreq
, arg
, sizeof(xfs_fsop_handlereq_t
)))
1411 return -XFS_ERROR(EFAULT
);
1412 return xfs_open_by_handle(filp
, &hreq
);
1414 case XFS_IOC_FSSETDM_BY_HANDLE
:
1415 return xfs_fssetdm_by_handle(filp
, arg
);
1417 case XFS_IOC_READLINK_BY_HANDLE
: {
1418 xfs_fsop_handlereq_t hreq
;
1420 if (copy_from_user(&hreq
, arg
, sizeof(xfs_fsop_handlereq_t
)))
1421 return -XFS_ERROR(EFAULT
);
1422 return xfs_readlink_by_handle(filp
, &hreq
);
1424 case XFS_IOC_ATTRLIST_BY_HANDLE
:
1425 return xfs_attrlist_by_handle(filp
, arg
);
1427 case XFS_IOC_ATTRMULTI_BY_HANDLE
:
1428 return xfs_attrmulti_by_handle(filp
, arg
);
1430 case XFS_IOC_SWAPEXT
: {
1431 struct xfs_swapext sxp
;
1433 if (copy_from_user(&sxp
, arg
, sizeof(xfs_swapext_t
)))
1434 return -XFS_ERROR(EFAULT
);
1435 error
= xfs_swapext(&sxp
);
1439 case XFS_IOC_FSCOUNTS
: {
1440 xfs_fsop_counts_t out
;
1442 error
= xfs_fs_counts(mp
, &out
);
1446 if (copy_to_user(arg
, &out
, sizeof(out
)))
1447 return -XFS_ERROR(EFAULT
);
1451 case XFS_IOC_SET_RESBLKS
: {
1452 xfs_fsop_resblks_t inout
;
1455 if (!capable(CAP_SYS_ADMIN
))
1458 if (copy_from_user(&inout
, arg
, sizeof(inout
)))
1459 return -XFS_ERROR(EFAULT
);
1461 /* input parameter is passed in resblks field of structure */
1463 error
= xfs_reserve_blocks(mp
, &in
, &inout
);
1467 if (copy_to_user(arg
, &inout
, sizeof(inout
)))
1468 return -XFS_ERROR(EFAULT
);
1472 case XFS_IOC_GET_RESBLKS
: {
1473 xfs_fsop_resblks_t out
;
1475 if (!capable(CAP_SYS_ADMIN
))
1478 error
= xfs_reserve_blocks(mp
, NULL
, &out
);
1482 if (copy_to_user(arg
, &out
, sizeof(out
)))
1483 return -XFS_ERROR(EFAULT
);
1488 case XFS_IOC_FSGROWFSDATA
: {
1489 xfs_growfs_data_t in
;
1491 if (copy_from_user(&in
, arg
, sizeof(in
)))
1492 return -XFS_ERROR(EFAULT
);
1494 error
= xfs_growfs_data(mp
, &in
);
1498 case XFS_IOC_FSGROWFSLOG
: {
1499 xfs_growfs_log_t in
;
1501 if (copy_from_user(&in
, arg
, sizeof(in
)))
1502 return -XFS_ERROR(EFAULT
);
1504 error
= xfs_growfs_log(mp
, &in
);
1508 case XFS_IOC_FSGROWFSRT
: {
1511 if (copy_from_user(&in
, arg
, sizeof(in
)))
1512 return -XFS_ERROR(EFAULT
);
1514 error
= xfs_growfs_rt(mp
, &in
);
1518 case XFS_IOC_GOINGDOWN
: {
1521 if (!capable(CAP_SYS_ADMIN
))
1524 if (get_user(in
, (__uint32_t __user
*)arg
))
1525 return -XFS_ERROR(EFAULT
);
1527 error
= xfs_fs_goingdown(mp
, in
);
1531 case XFS_IOC_ERROR_INJECTION
: {
1532 xfs_error_injection_t in
;
1534 if (!capable(CAP_SYS_ADMIN
))
1537 if (copy_from_user(&in
, arg
, sizeof(in
)))
1538 return -XFS_ERROR(EFAULT
);
1540 error
= xfs_errortag_add(in
.errtag
, mp
);
1544 case XFS_IOC_ERROR_CLEARALL
:
1545 if (!capable(CAP_SYS_ADMIN
))
1548 error
= xfs_errortag_clearall(mp
, 1);