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"
54 #include <linux/capability.h>
55 #include <linux/dcache.h>
56 #include <linux/mount.h>
57 #include <linux/namei.h>
58 #include <linux/pagemap.h>
61 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
62 * a file or fs handle.
64 * XFS_IOC_PATH_TO_FSHANDLE
65 * returns fs handle for a mount point or path within that mount point
66 * XFS_IOC_FD_TO_HANDLE
67 * returns full handle for a FD opened in user space
68 * XFS_IOC_PATH_TO_HANDLE
69 * returns full handle for a path
78 xfs_fsop_handlereq_t hreq
;
81 if (copy_from_user(&hreq
, arg
, sizeof(hreq
)))
82 return -XFS_ERROR(EFAULT
);
84 memset((char *)&handle
, 0, sizeof(handle
));
87 case XFS_IOC_PATH_TO_FSHANDLE
:
88 case XFS_IOC_PATH_TO_HANDLE
: {
90 int error
= user_lpath((const char __user
*)hreq
.path
, &path
);
95 ASSERT(path
.dentry
->d_inode
);
96 inode
= igrab(path
.dentry
->d_inode
);
101 case XFS_IOC_FD_TO_HANDLE
: {
104 file
= fget(hreq
.fd
);
108 ASSERT(file
->f_path
.dentry
);
109 ASSERT(file
->f_path
.dentry
->d_inode
);
110 inode
= igrab(file
->f_path
.dentry
->d_inode
);
117 return -XFS_ERROR(EINVAL
);
120 if (inode
->i_sb
->s_magic
!= XFS_SB_MAGIC
) {
121 /* we're not in XFS anymore, Toto */
123 return -XFS_ERROR(EINVAL
);
126 switch (inode
->i_mode
& S_IFMT
) {
133 return -XFS_ERROR(EBADF
);
136 /* now we can grab the fsid */
137 memcpy(&handle
.ha_fsid
, XFS_I(inode
)->i_mount
->m_fixedfsid
,
139 hsize
= sizeof(xfs_fsid_t
);
141 if (cmd
!= XFS_IOC_PATH_TO_FSHANDLE
) {
142 xfs_inode_t
*ip
= XFS_I(inode
);
145 /* need to get access to the xfs_inode to read the generation */
146 lock_mode
= xfs_ilock_map_shared(ip
);
148 /* fill in fid section of handle from inode */
149 handle
.ha_fid
.fid_len
= sizeof(xfs_fid_t
) -
150 sizeof(handle
.ha_fid
.fid_len
);
151 handle
.ha_fid
.fid_pad
= 0;
152 handle
.ha_fid
.fid_gen
= ip
->i_d
.di_gen
;
153 handle
.ha_fid
.fid_ino
= ip
->i_ino
;
155 xfs_iunlock_map_shared(ip
, lock_mode
);
157 hsize
= XFS_HSIZE(handle
);
160 /* now copy our handle into the user buffer & write out the size */
161 if (copy_to_user(hreq
.ohandle
, &handle
, hsize
) ||
162 copy_to_user(hreq
.ohandlen
, &hsize
, sizeof(__s32
))) {
164 return -XFS_ERROR(EFAULT
);
173 * Convert userspace handle data into inode.
175 * We use the fact that all the fsop_handlereq ioctl calls have a data
176 * structure argument whose first component is always a xfs_fsop_handlereq_t,
177 * so we can pass that sub structure into this handy, shared routine.
179 * If no error, caller must always iput the returned inode.
182 xfs_vget_fsop_handlereq(
184 struct inode
*parinode
, /* parent inode pointer */
185 xfs_fsop_handlereq_t
*hreq
,
186 struct inode
**inode
)
191 xfs_handle_t
*handlep
;
199 * Only allow handle opens under a directory.
201 if (!S_ISDIR(parinode
->i_mode
))
202 return XFS_ERROR(ENOTDIR
);
204 hanp
= hreq
->ihandle
;
205 hlen
= hreq
->ihandlen
;
208 if (hlen
< sizeof(handlep
->ha_fsid
) || hlen
> sizeof(*handlep
))
209 return XFS_ERROR(EINVAL
);
210 if (copy_from_user(handlep
, hanp
, hlen
))
211 return XFS_ERROR(EFAULT
);
212 if (hlen
< sizeof(*handlep
))
213 memset(((char *)handlep
) + hlen
, 0, sizeof(*handlep
) - hlen
);
214 if (hlen
> sizeof(handlep
->ha_fsid
)) {
215 if (handlep
->ha_fid
.fid_len
!=
216 (hlen
- sizeof(handlep
->ha_fsid
) -
217 sizeof(handlep
->ha_fid
.fid_len
)) ||
218 handlep
->ha_fid
.fid_pad
)
219 return XFS_ERROR(EINVAL
);
223 * Crack the handle, obtain the inode # & generation #
225 xfid
= (struct xfs_fid
*)&handlep
->ha_fid
;
226 if (xfid
->fid_len
== sizeof(*xfid
) - sizeof(xfid
->fid_len
)) {
228 igen
= xfid
->fid_gen
;
230 return XFS_ERROR(EINVAL
);
234 * Get the XFS inode, building a Linux inode to go with it.
236 error
= xfs_iget(mp
, NULL
, ino
, 0, XFS_ILOCK_SHARED
, &ip
, 0);
240 return XFS_ERROR(EIO
);
241 if (ip
->i_d
.di_gen
!= igen
) {
242 xfs_iput_new(ip
, XFS_ILOCK_SHARED
);
243 return XFS_ERROR(ENOENT
);
246 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
256 struct file
*parfilp
,
257 struct inode
*parinode
)
264 struct dentry
*dentry
;
265 xfs_fsop_handlereq_t hreq
;
267 if (!capable(CAP_SYS_ADMIN
))
268 return -XFS_ERROR(EPERM
);
269 if (copy_from_user(&hreq
, arg
, sizeof(xfs_fsop_handlereq_t
)))
270 return -XFS_ERROR(EFAULT
);
272 error
= xfs_vget_fsop_handlereq(mp
, parinode
, &hreq
, &inode
);
276 /* Restrict xfs_open_by_handle to directories & regular files. */
277 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
))) {
279 return -XFS_ERROR(EINVAL
);
282 #if BITS_PER_LONG != 32
283 hreq
.oflags
|= O_LARGEFILE
;
285 /* Put open permission in namei format. */
286 permflag
= hreq
.oflags
;
287 if ((permflag
+1) & O_ACCMODE
)
289 if (permflag
& O_TRUNC
)
292 if ((!(permflag
& O_APPEND
) || (permflag
& O_TRUNC
)) &&
293 (permflag
& FMODE_WRITE
) && IS_APPEND(inode
)) {
295 return -XFS_ERROR(EPERM
);
298 if ((permflag
& FMODE_WRITE
) && IS_IMMUTABLE(inode
)) {
300 return -XFS_ERROR(EACCES
);
303 /* Can't write directories. */
304 if ( S_ISDIR(inode
->i_mode
) && (permflag
& FMODE_WRITE
)) {
306 return -XFS_ERROR(EISDIR
);
309 if ((new_fd
= get_unused_fd()) < 0) {
314 dentry
= d_obtain_alias(inode
);
315 if (IS_ERR(dentry
)) {
316 put_unused_fd(new_fd
);
317 return PTR_ERR(dentry
);
320 /* Ensure umount returns EBUSY on umounts while this file is open. */
321 mntget(parfilp
->f_path
.mnt
);
323 /* Create file pointer. */
324 filp
= dentry_open(dentry
, parfilp
->f_path
.mnt
, hreq
.oflags
);
326 put_unused_fd(new_fd
);
327 return -XFS_ERROR(-PTR_ERR(filp
));
329 if (inode
->i_mode
& S_IFREG
) {
330 /* invisible operation should not change atime */
331 filp
->f_flags
|= O_NOATIME
;
332 filp
->f_op
= &xfs_invis_file_operations
;
335 fd_install(new_fd
, filp
);
340 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
341 * unused first argument.
356 if (len
> (unsigned) buflen
)
358 if (copy_to_user(buffer
, link
, len
))
366 xfs_readlink_by_handle(
369 struct inode
*parinode
)
372 xfs_fsop_handlereq_t hreq
;
377 if (!capable(CAP_SYS_ADMIN
))
378 return -XFS_ERROR(EPERM
);
379 if (copy_from_user(&hreq
, arg
, sizeof(xfs_fsop_handlereq_t
)))
380 return -XFS_ERROR(EFAULT
);
382 error
= xfs_vget_fsop_handlereq(mp
, parinode
, &hreq
, &inode
);
386 /* Restrict this handle operation to symlinks only. */
387 if (!S_ISLNK(inode
->i_mode
)) {
388 error
= -XFS_ERROR(EINVAL
);
392 if (copy_from_user(&olen
, hreq
.ohandlen
, sizeof(__u32
))) {
393 error
= -XFS_ERROR(EFAULT
);
397 link
= kmalloc(MAXPATHLEN
+1, GFP_KERNEL
);
401 error
= -xfs_readlink(XFS_I(inode
), link
);
404 error
= do_readlink(hreq
.ohandle
, olen
, link
);
416 xfs_fssetdm_by_handle(
419 struct inode
*parinode
)
422 struct fsdmidata fsd
;
423 xfs_fsop_setdm_handlereq_t dmhreq
;
426 if (!capable(CAP_MKNOD
))
427 return -XFS_ERROR(EPERM
);
428 if (copy_from_user(&dmhreq
, arg
, sizeof(xfs_fsop_setdm_handlereq_t
)))
429 return -XFS_ERROR(EFAULT
);
431 error
= xfs_vget_fsop_handlereq(mp
, parinode
, &dmhreq
.hreq
, &inode
);
435 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
)) {
436 error
= -XFS_ERROR(EPERM
);
440 if (copy_from_user(&fsd
, dmhreq
.data
, sizeof(fsd
))) {
441 error
= -XFS_ERROR(EFAULT
);
445 error
= -xfs_set_dmattrs(XFS_I(inode
), fsd
.fsd_dmevmask
,
454 xfs_attrlist_by_handle(
457 struct inode
*parinode
)
460 attrlist_cursor_kern_t
*cursor
;
461 xfs_fsop_attrlist_handlereq_t al_hreq
;
465 if (!capable(CAP_SYS_ADMIN
))
466 return -XFS_ERROR(EPERM
);
467 if (copy_from_user(&al_hreq
, arg
, sizeof(xfs_fsop_attrlist_handlereq_t
)))
468 return -XFS_ERROR(EFAULT
);
469 if (al_hreq
.buflen
> XATTR_LIST_MAX
)
470 return -XFS_ERROR(EINVAL
);
473 * Reject flags, only allow namespaces.
475 if (al_hreq
.flags
& ~(ATTR_ROOT
| ATTR_SECURE
))
476 return -XFS_ERROR(EINVAL
);
478 error
= xfs_vget_fsop_handlereq(mp
, parinode
, &al_hreq
.hreq
, &inode
);
482 kbuf
= kmalloc(al_hreq
.buflen
, GFP_KERNEL
);
486 cursor
= (attrlist_cursor_kern_t
*)&al_hreq
.pos
;
487 error
= xfs_attr_list(XFS_I(inode
), kbuf
, al_hreq
.buflen
,
488 al_hreq
.flags
, cursor
);
492 if (copy_to_user(al_hreq
.buffer
, kbuf
, al_hreq
.buflen
))
504 xfs_attrmulti_attr_get(
514 if (*len
> XATTR_SIZE_MAX
)
516 kbuf
= kmalloc(*len
, GFP_KERNEL
);
520 error
= xfs_attr_get(XFS_I(inode
), name
, kbuf
, (int *)len
, flags
);
524 if (copy_to_user(ubuf
, kbuf
, *len
))
533 xfs_attrmulti_attr_set(
536 const char __user
*ubuf
,
543 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
545 if (len
> XATTR_SIZE_MAX
)
548 kbuf
= kmalloc(len
, GFP_KERNEL
);
552 if (copy_from_user(kbuf
, ubuf
, len
))
555 error
= xfs_attr_set(XFS_I(inode
), name
, kbuf
, len
, flags
);
563 xfs_attrmulti_attr_remove(
568 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
570 return xfs_attr_remove(XFS_I(inode
), name
, flags
);
574 xfs_attrmulti_by_handle(
577 struct file
*parfilp
,
578 struct inode
*parinode
)
581 xfs_attr_multiop_t
*ops
;
582 xfs_fsop_attrmulti_handlereq_t am_hreq
;
584 unsigned int i
, size
;
587 if (!capable(CAP_SYS_ADMIN
))
588 return -XFS_ERROR(EPERM
);
589 if (copy_from_user(&am_hreq
, arg
, sizeof(xfs_fsop_attrmulti_handlereq_t
)))
590 return -XFS_ERROR(EFAULT
);
592 error
= xfs_vget_fsop_handlereq(mp
, parinode
, &am_hreq
.hreq
, &inode
);
597 size
= am_hreq
.opcount
* sizeof(xfs_attr_multiop_t
);
598 if (!size
|| size
> 16 * PAGE_SIZE
)
602 ops
= kmalloc(size
, GFP_KERNEL
);
607 if (copy_from_user(ops
, am_hreq
.ops
, size
))
610 attr_name
= kmalloc(MAXNAMELEN
, GFP_KERNEL
);
616 for (i
= 0; i
< am_hreq
.opcount
; i
++) {
617 ops
[i
].am_error
= strncpy_from_user(attr_name
,
618 ops
[i
].am_attrname
, MAXNAMELEN
);
619 if (ops
[i
].am_error
== 0 || ops
[i
].am_error
== MAXNAMELEN
)
621 if (ops
[i
].am_error
< 0)
624 switch (ops
[i
].am_opcode
) {
626 ops
[i
].am_error
= xfs_attrmulti_attr_get(inode
,
627 attr_name
, ops
[i
].am_attrvalue
,
628 &ops
[i
].am_length
, ops
[i
].am_flags
);
631 ops
[i
].am_error
= mnt_want_write(parfilp
->f_path
.mnt
);
634 ops
[i
].am_error
= xfs_attrmulti_attr_set(inode
,
635 attr_name
, ops
[i
].am_attrvalue
,
636 ops
[i
].am_length
, ops
[i
].am_flags
);
637 mnt_drop_write(parfilp
->f_path
.mnt
);
640 ops
[i
].am_error
= mnt_want_write(parfilp
->f_path
.mnt
);
643 ops
[i
].am_error
= xfs_attrmulti_attr_remove(inode
,
644 attr_name
, ops
[i
].am_flags
);
645 mnt_drop_write(parfilp
->f_path
.mnt
);
648 ops
[i
].am_error
= EINVAL
;
652 if (copy_to_user(am_hreq
.ops
, ops
, size
))
653 error
= XFS_ERROR(EFAULT
);
666 struct xfs_inode
*ip
,
677 if (inode
->i_flags
& (S_IMMUTABLE
|S_APPEND
))
678 return -XFS_ERROR(EPERM
);
680 if (!(filp
->f_mode
& FMODE_WRITE
))
681 return -XFS_ERROR(EBADF
);
683 if (!S_ISREG(inode
->i_mode
))
684 return -XFS_ERROR(EINVAL
);
686 if (copy_from_user(&bf
, arg
, sizeof(bf
)))
687 return -XFS_ERROR(EFAULT
);
689 if (filp
->f_flags
& (O_NDELAY
|O_NONBLOCK
))
690 attr_flags
|= XFS_ATTR_NONBLOCK
;
691 if (ioflags
& IO_INVIS
)
692 attr_flags
|= XFS_ATTR_DMI
;
694 error
= xfs_change_file_space(ip
, cmd
, &bf
, filp
->f_pos
,
705 xfs_fsop_bulkreq_t bulkreq
;
706 int count
; /* # of records returned */
707 xfs_ino_t inlast
; /* last inode number */
711 /* done = 1 if there are more stats to get and if bulkstat */
712 /* should be called again (unused here, but used in dmapi) */
714 if (!capable(CAP_SYS_ADMIN
))
717 if (XFS_FORCED_SHUTDOWN(mp
))
718 return -XFS_ERROR(EIO
);
720 if (copy_from_user(&bulkreq
, arg
, sizeof(xfs_fsop_bulkreq_t
)))
721 return -XFS_ERROR(EFAULT
);
723 if (copy_from_user(&inlast
, bulkreq
.lastip
, sizeof(__s64
)))
724 return -XFS_ERROR(EFAULT
);
726 if ((count
= bulkreq
.icount
) <= 0)
727 return -XFS_ERROR(EINVAL
);
729 if (bulkreq
.ubuffer
== NULL
)
730 return -XFS_ERROR(EINVAL
);
732 if (cmd
== XFS_IOC_FSINUMBERS
)
733 error
= xfs_inumbers(mp
, &inlast
, &count
,
734 bulkreq
.ubuffer
, xfs_inumbers_fmt
);
735 else if (cmd
== XFS_IOC_FSBULKSTAT_SINGLE
)
736 error
= xfs_bulkstat_single(mp
, &inlast
,
737 bulkreq
.ubuffer
, &done
);
738 else /* XFS_IOC_FSBULKSTAT */
739 error
= xfs_bulkstat(mp
, &inlast
, &count
,
740 (bulkstat_one_pf
)xfs_bulkstat_one
, NULL
,
741 sizeof(xfs_bstat_t
), bulkreq
.ubuffer
,
742 BULKSTAT_FG_QUICK
, &done
);
747 if (bulkreq
.ocount
!= NULL
) {
748 if (copy_to_user(bulkreq
.lastip
, &inlast
,
750 return -XFS_ERROR(EFAULT
);
752 if (copy_to_user(bulkreq
.ocount
, &count
, sizeof(count
)))
753 return -XFS_ERROR(EFAULT
);
760 xfs_ioc_fsgeometry_v1(
764 xfs_fsop_geom_v1_t fsgeo
;
767 error
= xfs_fs_geometry(mp
, (xfs_fsop_geom_t
*)&fsgeo
, 3);
771 if (copy_to_user(arg
, &fsgeo
, sizeof(fsgeo
)))
772 return -XFS_ERROR(EFAULT
);
781 xfs_fsop_geom_t fsgeo
;
784 error
= xfs_fs_geometry(mp
, &fsgeo
, 4);
788 if (copy_to_user(arg
, &fsgeo
, sizeof(fsgeo
)))
789 return -XFS_ERROR(EFAULT
);
794 * Linux extended inode flags interface.
798 xfs_merge_ioc_xflags(
802 unsigned int xflags
= start
;
804 if (flags
& FS_IMMUTABLE_FL
)
805 xflags
|= XFS_XFLAG_IMMUTABLE
;
807 xflags
&= ~XFS_XFLAG_IMMUTABLE
;
808 if (flags
& FS_APPEND_FL
)
809 xflags
|= XFS_XFLAG_APPEND
;
811 xflags
&= ~XFS_XFLAG_APPEND
;
812 if (flags
& FS_SYNC_FL
)
813 xflags
|= XFS_XFLAG_SYNC
;
815 xflags
&= ~XFS_XFLAG_SYNC
;
816 if (flags
& FS_NOATIME_FL
)
817 xflags
|= XFS_XFLAG_NOATIME
;
819 xflags
&= ~XFS_XFLAG_NOATIME
;
820 if (flags
& FS_NODUMP_FL
)
821 xflags
|= XFS_XFLAG_NODUMP
;
823 xflags
&= ~XFS_XFLAG_NODUMP
;
832 unsigned int flags
= 0;
834 if (di_flags
& XFS_DIFLAG_IMMUTABLE
)
835 flags
|= FS_IMMUTABLE_FL
;
836 if (di_flags
& XFS_DIFLAG_APPEND
)
837 flags
|= FS_APPEND_FL
;
838 if (di_flags
& XFS_DIFLAG_SYNC
)
840 if (di_flags
& XFS_DIFLAG_NOATIME
)
841 flags
|= FS_NOATIME_FL
;
842 if (di_flags
& XFS_DIFLAG_NODUMP
)
843 flags
|= FS_NODUMP_FL
;
855 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
856 fa
.fsx_xflags
= xfs_ip2xflags(ip
);
857 fa
.fsx_extsize
= ip
->i_d
.di_extsize
<< ip
->i_mount
->m_sb
.sb_blocklog
;
858 fa
.fsx_projid
= ip
->i_d
.di_projid
;
862 if (ip
->i_afp
->if_flags
& XFS_IFEXTENTS
)
863 fa
.fsx_nextents
= ip
->i_afp
->if_bytes
/
864 sizeof(xfs_bmbt_rec_t
);
866 fa
.fsx_nextents
= ip
->i_d
.di_anextents
;
870 if (ip
->i_df
.if_flags
& XFS_IFEXTENTS
)
871 fa
.fsx_nextents
= ip
->i_df
.if_bytes
/
872 sizeof(xfs_bmbt_rec_t
);
874 fa
.fsx_nextents
= ip
->i_d
.di_nextents
;
876 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
878 if (copy_to_user(arg
, &fa
, sizeof(fa
)))
885 struct xfs_inode
*ip
,
888 unsigned int di_flags
;
890 /* can't set PREALLOC this way, just preserve it */
891 di_flags
= (ip
->i_d
.di_flags
& XFS_DIFLAG_PREALLOC
);
892 if (xflags
& XFS_XFLAG_IMMUTABLE
)
893 di_flags
|= XFS_DIFLAG_IMMUTABLE
;
894 if (xflags
& XFS_XFLAG_APPEND
)
895 di_flags
|= XFS_DIFLAG_APPEND
;
896 if (xflags
& XFS_XFLAG_SYNC
)
897 di_flags
|= XFS_DIFLAG_SYNC
;
898 if (xflags
& XFS_XFLAG_NOATIME
)
899 di_flags
|= XFS_DIFLAG_NOATIME
;
900 if (xflags
& XFS_XFLAG_NODUMP
)
901 di_flags
|= XFS_DIFLAG_NODUMP
;
902 if (xflags
& XFS_XFLAG_PROJINHERIT
)
903 di_flags
|= XFS_DIFLAG_PROJINHERIT
;
904 if (xflags
& XFS_XFLAG_NODEFRAG
)
905 di_flags
|= XFS_DIFLAG_NODEFRAG
;
906 if (xflags
& XFS_XFLAG_FILESTREAM
)
907 di_flags
|= XFS_DIFLAG_FILESTREAM
;
908 if ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFDIR
) {
909 if (xflags
& XFS_XFLAG_RTINHERIT
)
910 di_flags
|= XFS_DIFLAG_RTINHERIT
;
911 if (xflags
& XFS_XFLAG_NOSYMLINKS
)
912 di_flags
|= XFS_DIFLAG_NOSYMLINKS
;
913 if (xflags
& XFS_XFLAG_EXTSZINHERIT
)
914 di_flags
|= XFS_DIFLAG_EXTSZINHERIT
;
915 } else if ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
) {
916 if (xflags
& XFS_XFLAG_REALTIME
)
917 di_flags
|= XFS_DIFLAG_REALTIME
;
918 if (xflags
& XFS_XFLAG_EXTSIZE
)
919 di_flags
|= XFS_DIFLAG_EXTSIZE
;
922 ip
->i_d
.di_flags
= di_flags
;
926 xfs_diflags_to_linux(
927 struct xfs_inode
*ip
)
929 struct inode
*inode
= VFS_I(ip
);
930 unsigned int xflags
= xfs_ip2xflags(ip
);
932 if (xflags
& XFS_XFLAG_IMMUTABLE
)
933 inode
->i_flags
|= S_IMMUTABLE
;
935 inode
->i_flags
&= ~S_IMMUTABLE
;
936 if (xflags
& XFS_XFLAG_APPEND
)
937 inode
->i_flags
|= S_APPEND
;
939 inode
->i_flags
&= ~S_APPEND
;
940 if (xflags
& XFS_XFLAG_SYNC
)
941 inode
->i_flags
|= S_SYNC
;
943 inode
->i_flags
&= ~S_SYNC
;
944 if (xflags
& XFS_XFLAG_NOATIME
)
945 inode
->i_flags
|= S_NOATIME
;
947 inode
->i_flags
&= ~S_NOATIME
;
951 #define FSX_EXTSIZE 2
953 #define FSX_NONBLOCK 8
961 struct xfs_mount
*mp
= ip
->i_mount
;
962 struct xfs_trans
*tp
;
963 unsigned int lock_flags
= 0;
964 struct xfs_dquot
*udqp
= NULL
, *gdqp
= NULL
;
965 struct xfs_dquot
*olddquot
= NULL
;
968 xfs_itrace_entry(ip
);
970 if (mp
->m_flags
& XFS_MOUNT_RDONLY
)
971 return XFS_ERROR(EROFS
);
972 if (XFS_FORCED_SHUTDOWN(mp
))
973 return XFS_ERROR(EIO
);
976 * If disk quotas is on, we make sure that the dquots do exist on disk,
977 * before we start any other transactions. Trying to do this later
978 * is messy. We don't care to take a readlock to look at the ids
979 * in inode here, because we can't hold it across the trans_reserve.
980 * If the IDs do change before we take the ilock, we're covered
981 * because the i_*dquot fields will get updated anyway.
983 if (XFS_IS_QUOTA_ON(mp
) && (mask
& FSX_PROJID
)) {
984 code
= XFS_QM_DQVOPALLOC(mp
, ip
, ip
->i_d
.di_uid
,
985 ip
->i_d
.di_gid
, fa
->fsx_projid
,
986 XFS_QMOPT_PQUOTA
, &udqp
, &gdqp
);
992 * For the other attributes, we acquire the inode lock and
993 * first do an error checking pass.
995 tp
= xfs_trans_alloc(mp
, XFS_TRANS_SETATTR_NOT_SIZE
);
996 code
= xfs_trans_reserve(tp
, 0, XFS_ICHANGE_LOG_RES(mp
), 0, 0, 0);
1000 lock_flags
= XFS_ILOCK_EXCL
;
1001 xfs_ilock(ip
, lock_flags
);
1004 * CAP_FOWNER overrides the following restrictions:
1006 * The user ID of the calling process must be equal
1007 * to the file owner ID, except in cases where the
1008 * CAP_FSETID capability is applicable.
1010 if (current
->fsuid
!= ip
->i_d
.di_uid
&& !capable(CAP_FOWNER
)) {
1011 code
= XFS_ERROR(EPERM
);
1016 * Do a quota reservation only if projid is actually going to change.
1018 if (mask
& FSX_PROJID
) {
1019 if (XFS_IS_PQUOTA_ON(mp
) &&
1020 ip
->i_d
.di_projid
!= fa
->fsx_projid
) {
1022 code
= XFS_QM_DQVOPCHOWNRESV(mp
, tp
, ip
, udqp
, gdqp
,
1023 capable(CAP_FOWNER
) ?
1024 XFS_QMOPT_FORCE_RES
: 0);
1025 if (code
) /* out of quota */
1030 if (mask
& FSX_EXTSIZE
) {
1032 * Can't change extent size if any extents are allocated.
1034 if (ip
->i_d
.di_nextents
&&
1035 ((ip
->i_d
.di_extsize
<< mp
->m_sb
.sb_blocklog
) !=
1037 code
= XFS_ERROR(EINVAL
); /* EFBIG? */
1042 * Extent size must be a multiple of the appropriate block
1043 * size, if set at all.
1045 if (fa
->fsx_extsize
!= 0) {
1048 if (XFS_IS_REALTIME_INODE(ip
) ||
1049 ((mask
& FSX_XFLAGS
) &&
1050 (fa
->fsx_xflags
& XFS_XFLAG_REALTIME
))) {
1051 size
= mp
->m_sb
.sb_rextsize
<<
1052 mp
->m_sb
.sb_blocklog
;
1054 size
= mp
->m_sb
.sb_blocksize
;
1057 if (fa
->fsx_extsize
% size
) {
1058 code
= XFS_ERROR(EINVAL
);
1065 if (mask
& FSX_XFLAGS
) {
1067 * Can't change realtime flag if any extents are allocated.
1069 if ((ip
->i_d
.di_nextents
|| ip
->i_delayed_blks
) &&
1070 (XFS_IS_REALTIME_INODE(ip
)) !=
1071 (fa
->fsx_xflags
& XFS_XFLAG_REALTIME
)) {
1072 code
= XFS_ERROR(EINVAL
); /* EFBIG? */
1077 * If realtime flag is set then must have realtime data.
1079 if ((fa
->fsx_xflags
& XFS_XFLAG_REALTIME
)) {
1080 if ((mp
->m_sb
.sb_rblocks
== 0) ||
1081 (mp
->m_sb
.sb_rextsize
== 0) ||
1082 (ip
->i_d
.di_extsize
% mp
->m_sb
.sb_rextsize
)) {
1083 code
= XFS_ERROR(EINVAL
);
1089 * Can't modify an immutable/append-only file unless
1090 * we have appropriate permission.
1092 if ((ip
->i_d
.di_flags
&
1093 (XFS_DIFLAG_IMMUTABLE
|XFS_DIFLAG_APPEND
) ||
1095 (XFS_XFLAG_IMMUTABLE
| XFS_XFLAG_APPEND
))) &&
1096 !capable(CAP_LINUX_IMMUTABLE
)) {
1097 code
= XFS_ERROR(EPERM
);
1102 xfs_trans_ijoin(tp
, ip
, lock_flags
);
1103 xfs_trans_ihold(tp
, ip
);
1106 * Change file ownership. Must be the owner or privileged.
1107 * If the system was configured with the "restricted_chown"
1108 * option, the owner is not permitted to give away the file,
1109 * and can change the group id only to a group of which he
1110 * or she is a member.
1112 if (mask
& FSX_PROJID
) {
1114 * CAP_FSETID overrides the following restrictions:
1116 * The set-user-ID and set-group-ID bits of a file will be
1117 * cleared upon successful return from chown()
1119 if ((ip
->i_d
.di_mode
& (S_ISUID
|S_ISGID
)) &&
1120 !capable(CAP_FSETID
))
1121 ip
->i_d
.di_mode
&= ~(S_ISUID
|S_ISGID
);
1124 * Change the ownerships and register quota modifications
1125 * in the transaction.
1127 if (ip
->i_d
.di_projid
!= fa
->fsx_projid
) {
1128 if (XFS_IS_PQUOTA_ON(mp
)) {
1129 olddquot
= XFS_QM_DQVOPCHOWN(mp
, tp
, ip
,
1130 &ip
->i_gdquot
, gdqp
);
1132 ip
->i_d
.di_projid
= fa
->fsx_projid
;
1135 * We may have to rev the inode as well as
1136 * the superblock version number since projids didn't
1137 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1139 if (ip
->i_d
.di_version
== XFS_DINODE_VERSION_1
)
1140 xfs_bump_ino_vers2(tp
, ip
);
1145 if (mask
& FSX_EXTSIZE
)
1146 ip
->i_d
.di_extsize
= fa
->fsx_extsize
>> mp
->m_sb
.sb_blocklog
;
1147 if (mask
& FSX_XFLAGS
) {
1148 xfs_set_diflags(ip
, fa
->fsx_xflags
);
1149 xfs_diflags_to_linux(ip
);
1152 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1153 xfs_ichgtime(ip
, XFS_ICHGTIME_CHG
);
1155 XFS_STATS_INC(xs_ig_attrchg
);
1158 * If this is a synchronous mount, make sure that the
1159 * transaction goes to disk before returning to the user.
1160 * This is slightly sub-optimal in that truncates require
1161 * two sync transactions instead of one for wsync filesystems.
1162 * One for the truncate and one for the timestamps since we
1163 * don't want to change the timestamps unless we're sure the
1164 * truncate worked. Truncates are less than 1% of the laddis
1165 * mix so this probably isn't worth the trouble to optimize.
1167 if (mp
->m_flags
& XFS_MOUNT_WSYNC
)
1168 xfs_trans_set_sync(tp
);
1169 code
= xfs_trans_commit(tp
, 0);
1170 xfs_iunlock(ip
, lock_flags
);
1173 * Release any dquot(s) the inode had kept before chown.
1175 XFS_QM_DQRELE(mp
, olddquot
);
1176 XFS_QM_DQRELE(mp
, udqp
);
1177 XFS_QM_DQRELE(mp
, gdqp
);
1182 if (DM_EVENT_ENABLED(ip
, DM_EVENT_ATTRIBUTE
)) {
1183 XFS_SEND_NAMESP(mp
, DM_EVENT_ATTRIBUTE
, ip
, DM_RIGHT_NULL
,
1184 NULL
, DM_RIGHT_NULL
, NULL
, NULL
, 0, 0,
1185 (mask
& FSX_NONBLOCK
) ? DM_FLAGS_NDELAY
: 0);
1191 XFS_QM_DQRELE(mp
, udqp
);
1192 XFS_QM_DQRELE(mp
, gdqp
);
1193 xfs_trans_cancel(tp
, 0);
1195 xfs_iunlock(ip
, lock_flags
);
1208 if (copy_from_user(&fa
, arg
, sizeof(fa
)))
1211 mask
= FSX_XFLAGS
| FSX_EXTSIZE
| FSX_PROJID
;
1212 if (filp
->f_flags
& (O_NDELAY
|O_NONBLOCK
))
1213 mask
|= FSX_NONBLOCK
;
1215 return -xfs_ioctl_setattr(ip
, &fa
, mask
);
1225 flags
= xfs_di2lxflags(ip
->i_d
.di_flags
);
1226 if (copy_to_user(arg
, &flags
, sizeof(flags
)))
1241 if (copy_from_user(&flags
, arg
, sizeof(flags
)))
1244 if (flags
& ~(FS_IMMUTABLE_FL
| FS_APPEND_FL
| \
1245 FS_NOATIME_FL
| FS_NODUMP_FL
| \
1250 if (filp
->f_flags
& (O_NDELAY
|O_NONBLOCK
))
1251 mask
|= FSX_NONBLOCK
;
1252 fa
.fsx_xflags
= xfs_merge_ioc_xflags(flags
, xfs_ip2xflags(ip
));
1254 return -xfs_ioctl_setattr(ip
, &fa
, mask
);
1259 struct xfs_inode
*ip
,
1268 if (copy_from_user(&bm
, arg
, sizeof(bm
)))
1269 return -XFS_ERROR(EFAULT
);
1271 if (bm
.bmv_count
< 2)
1272 return -XFS_ERROR(EINVAL
);
1274 iflags
= (cmd
== XFS_IOC_GETBMAPA
? BMV_IF_ATTRFORK
: 0);
1275 if (ioflags
& IO_INVIS
)
1276 iflags
|= BMV_IF_NO_DMAPI_READ
;
1278 error
= xfs_getbmap(ip
, &bm
, (struct getbmap __user
*)arg
+1, iflags
);
1282 if (copy_to_user(arg
, &bm
, sizeof(bm
)))
1283 return -XFS_ERROR(EFAULT
);
1289 struct xfs_inode
*ip
,
1292 struct getbmapx bmx
;
1297 if (copy_from_user(&bmx
, arg
, sizeof(bmx
)))
1298 return -XFS_ERROR(EFAULT
);
1300 if (bmx
.bmv_count
< 2)
1301 return -XFS_ERROR(EINVAL
);
1304 * Map input getbmapx structure to a getbmap
1305 * structure for xfs_getbmap.
1307 GETBMAP_CONVERT(bmx
, bm
);
1309 iflags
= bmx
.bmv_iflags
;
1311 if (iflags
& (~BMV_IF_VALID
))
1312 return -XFS_ERROR(EINVAL
);
1314 iflags
|= BMV_IF_EXTENDED
;
1316 error
= xfs_getbmap(ip
, &bm
, (struct getbmapx __user
*)arg
+1, iflags
);
1320 GETBMAP_CONVERT(bm
, bmx
);
1322 if (copy_to_user(arg
, &bmx
, sizeof(bmx
)))
1323 return -XFS_ERROR(EFAULT
);
1336 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
1337 xfs_mount_t
*mp
= ip
->i_mount
;
1340 xfs_itrace_entry(XFS_I(inode
));
1343 case XFS_IOC_ALLOCSP
:
1344 case XFS_IOC_FREESP
:
1345 case XFS_IOC_RESVSP
:
1346 case XFS_IOC_UNRESVSP
:
1347 case XFS_IOC_ALLOCSP64
:
1348 case XFS_IOC_FREESP64
:
1349 case XFS_IOC_RESVSP64
:
1350 case XFS_IOC_UNRESVSP64
:
1352 * Only allow the sys admin to reserve space unless
1353 * unwritten extents are enabled.
1355 if (!xfs_sb_version_hasextflgbit(&mp
->m_sb
) &&
1356 !capable(CAP_SYS_ADMIN
))
1359 return xfs_ioc_space(ip
, inode
, filp
, ioflags
, cmd
, arg
);
1361 case XFS_IOC_DIOINFO
: {
1363 xfs_buftarg_t
*target
=
1364 XFS_IS_REALTIME_INODE(ip
) ?
1365 mp
->m_rtdev_targp
: mp
->m_ddev_targp
;
1367 da
.d_mem
= da
.d_miniosz
= 1 << target
->bt_sshift
;
1368 da
.d_maxiosz
= INT_MAX
& ~(da
.d_miniosz
- 1);
1370 if (copy_to_user(arg
, &da
, sizeof(da
)))
1371 return -XFS_ERROR(EFAULT
);
1375 case XFS_IOC_FSBULKSTAT_SINGLE
:
1376 case XFS_IOC_FSBULKSTAT
:
1377 case XFS_IOC_FSINUMBERS
:
1378 return xfs_ioc_bulkstat(mp
, cmd
, arg
);
1380 case XFS_IOC_FSGEOMETRY_V1
:
1381 return xfs_ioc_fsgeometry_v1(mp
, arg
);
1383 case XFS_IOC_FSGEOMETRY
:
1384 return xfs_ioc_fsgeometry(mp
, arg
);
1386 case XFS_IOC_GETVERSION
:
1387 return put_user(inode
->i_generation
, (int __user
*)arg
);
1389 case XFS_IOC_FSGETXATTR
:
1390 return xfs_ioc_fsgetxattr(ip
, 0, arg
);
1391 case XFS_IOC_FSGETXATTRA
:
1392 return xfs_ioc_fsgetxattr(ip
, 1, arg
);
1393 case XFS_IOC_FSSETXATTR
:
1394 return xfs_ioc_fssetxattr(ip
, filp
, arg
);
1395 case XFS_IOC_GETXFLAGS
:
1396 return xfs_ioc_getxflags(ip
, arg
);
1397 case XFS_IOC_SETXFLAGS
:
1398 return xfs_ioc_setxflags(ip
, filp
, arg
);
1400 case XFS_IOC_FSSETDM
: {
1401 struct fsdmidata dmi
;
1403 if (copy_from_user(&dmi
, arg
, sizeof(dmi
)))
1404 return -XFS_ERROR(EFAULT
);
1406 error
= xfs_set_dmattrs(ip
, dmi
.fsd_dmevmask
,
1411 case XFS_IOC_GETBMAP
:
1412 case XFS_IOC_GETBMAPA
:
1413 return xfs_ioc_getbmap(ip
, ioflags
, cmd
, arg
);
1415 case XFS_IOC_GETBMAPX
:
1416 return xfs_ioc_getbmapx(ip
, arg
);
1418 case XFS_IOC_FD_TO_HANDLE
:
1419 case XFS_IOC_PATH_TO_HANDLE
:
1420 case XFS_IOC_PATH_TO_FSHANDLE
:
1421 return xfs_find_handle(cmd
, arg
);
1423 case XFS_IOC_OPEN_BY_HANDLE
:
1424 return xfs_open_by_handle(mp
, arg
, filp
, inode
);
1426 case XFS_IOC_FSSETDM_BY_HANDLE
:
1427 return xfs_fssetdm_by_handle(mp
, arg
, inode
);
1429 case XFS_IOC_READLINK_BY_HANDLE
:
1430 return xfs_readlink_by_handle(mp
, arg
, inode
);
1432 case XFS_IOC_ATTRLIST_BY_HANDLE
:
1433 return xfs_attrlist_by_handle(mp
, arg
, inode
);
1435 case XFS_IOC_ATTRMULTI_BY_HANDLE
:
1436 return xfs_attrmulti_by_handle(mp
, arg
, filp
, inode
);
1438 case XFS_IOC_SWAPEXT
: {
1439 error
= xfs_swapext((struct xfs_swapext __user
*)arg
);
1443 case XFS_IOC_FSCOUNTS
: {
1444 xfs_fsop_counts_t out
;
1446 error
= xfs_fs_counts(mp
, &out
);
1450 if (copy_to_user(arg
, &out
, sizeof(out
)))
1451 return -XFS_ERROR(EFAULT
);
1455 case XFS_IOC_SET_RESBLKS
: {
1456 xfs_fsop_resblks_t inout
;
1459 if (!capable(CAP_SYS_ADMIN
))
1462 if (copy_from_user(&inout
, arg
, sizeof(inout
)))
1463 return -XFS_ERROR(EFAULT
);
1465 /* input parameter is passed in resblks field of structure */
1467 error
= xfs_reserve_blocks(mp
, &in
, &inout
);
1471 if (copy_to_user(arg
, &inout
, sizeof(inout
)))
1472 return -XFS_ERROR(EFAULT
);
1476 case XFS_IOC_GET_RESBLKS
: {
1477 xfs_fsop_resblks_t out
;
1479 if (!capable(CAP_SYS_ADMIN
))
1482 error
= xfs_reserve_blocks(mp
, NULL
, &out
);
1486 if (copy_to_user(arg
, &out
, sizeof(out
)))
1487 return -XFS_ERROR(EFAULT
);
1492 case XFS_IOC_FSGROWFSDATA
: {
1493 xfs_growfs_data_t in
;
1495 if (!capable(CAP_SYS_ADMIN
))
1498 if (copy_from_user(&in
, arg
, sizeof(in
)))
1499 return -XFS_ERROR(EFAULT
);
1501 error
= xfs_growfs_data(mp
, &in
);
1505 case XFS_IOC_FSGROWFSLOG
: {
1506 xfs_growfs_log_t in
;
1508 if (!capable(CAP_SYS_ADMIN
))
1511 if (copy_from_user(&in
, arg
, sizeof(in
)))
1512 return -XFS_ERROR(EFAULT
);
1514 error
= xfs_growfs_log(mp
, &in
);
1518 case XFS_IOC_FSGROWFSRT
: {
1521 if (!capable(CAP_SYS_ADMIN
))
1524 if (copy_from_user(&in
, arg
, sizeof(in
)))
1525 return -XFS_ERROR(EFAULT
);
1527 error
= xfs_growfs_rt(mp
, &in
);
1531 case XFS_IOC_FREEZE
:
1532 if (!capable(CAP_SYS_ADMIN
))
1535 if (inode
->i_sb
->s_frozen
== SB_UNFROZEN
)
1536 freeze_bdev(inode
->i_sb
->s_bdev
);
1540 if (!capable(CAP_SYS_ADMIN
))
1542 if (inode
->i_sb
->s_frozen
!= SB_UNFROZEN
)
1543 thaw_bdev(inode
->i_sb
->s_bdev
, inode
->i_sb
);
1546 case XFS_IOC_GOINGDOWN
: {
1549 if (!capable(CAP_SYS_ADMIN
))
1552 if (get_user(in
, (__uint32_t __user
*)arg
))
1553 return -XFS_ERROR(EFAULT
);
1555 error
= xfs_fs_goingdown(mp
, in
);
1559 case XFS_IOC_ERROR_INJECTION
: {
1560 xfs_error_injection_t in
;
1562 if (!capable(CAP_SYS_ADMIN
))
1565 if (copy_from_user(&in
, arg
, sizeof(in
)))
1566 return -XFS_ERROR(EFAULT
);
1568 error
= xfs_errortag_add(in
.errtag
, mp
);
1572 case XFS_IOC_ERROR_CLEARALL
:
1573 if (!capable(CAP_SYS_ADMIN
))
1576 error
= xfs_errortag_clearall(mp
, 1);