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"
54 #include "xfs_trace.h"
56 #include <linux/capability.h>
57 #include <linux/dcache.h>
58 #include <linux/mount.h>
59 #include <linux/namei.h>
60 #include <linux/pagemap.h>
61 #include <linux/exportfs.h>
64 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
65 * a file or fs handle.
67 * XFS_IOC_PATH_TO_FSHANDLE
68 * returns fs handle for a mount point or path within that mount point
69 * XFS_IOC_FD_TO_HANDLE
70 * returns full handle for a FD opened in user space
71 * XFS_IOC_PATH_TO_HANDLE
72 * returns full handle for a path
77 xfs_fsop_handlereq_t
*hreq
)
82 struct file
*file
= NULL
;
87 if (cmd
== XFS_IOC_FD_TO_HANDLE
) {
88 file
= fget(hreq
->fd
);
91 inode
= file
->f_path
.dentry
->d_inode
;
93 error
= user_lpath((const char __user
*)hreq
->path
, &path
);
96 inode
= path
.dentry
->d_inode
;
101 * We can only generate handles for inodes residing on a XFS filesystem,
102 * and only for regular files, directories or symbolic links.
105 if (inode
->i_sb
->s_magic
!= XFS_SB_MAGIC
)
109 if (!S_ISREG(inode
->i_mode
) &&
110 !S_ISDIR(inode
->i_mode
) &&
111 !S_ISLNK(inode
->i_mode
))
115 memcpy(&handle
.ha_fsid
, ip
->i_mount
->m_fixedfsid
, sizeof(xfs_fsid_t
));
117 if (cmd
== XFS_IOC_PATH_TO_FSHANDLE
) {
119 * This handle only contains an fsid, zero the rest.
121 memset(&handle
.ha_fid
, 0, sizeof(handle
.ha_fid
));
122 hsize
= sizeof(xfs_fsid_t
);
126 lock_mode
= xfs_ilock_map_shared(ip
);
127 handle
.ha_fid
.fid_len
= sizeof(xfs_fid_t
) -
128 sizeof(handle
.ha_fid
.fid_len
);
129 handle
.ha_fid
.fid_pad
= 0;
130 handle
.ha_fid
.fid_gen
= ip
->i_d
.di_gen
;
131 handle
.ha_fid
.fid_ino
= ip
->i_ino
;
132 xfs_iunlock_map_shared(ip
, lock_mode
);
134 hsize
= XFS_HSIZE(handle
);
138 if (copy_to_user(hreq
->ohandle
, &handle
, hsize
) ||
139 copy_to_user(hreq
->ohandlen
, &hsize
, sizeof(__s32
)))
145 if (cmd
== XFS_IOC_FD_TO_HANDLE
)
153 * No need to do permission checks on the various pathname components
154 * as the handle operations are privileged.
157 xfs_handle_acceptable(
159 struct dentry
*dentry
)
165 * Convert userspace handle data into a dentry.
168 xfs_handle_to_dentry(
169 struct file
*parfilp
,
170 void __user
*uhandle
,
174 struct xfs_fid64 fid
;
177 * Only allow handle opens under a directory.
179 if (!S_ISDIR(parfilp
->f_path
.dentry
->d_inode
->i_mode
))
180 return ERR_PTR(-ENOTDIR
);
182 if (hlen
!= sizeof(xfs_handle_t
))
183 return ERR_PTR(-EINVAL
);
184 if (copy_from_user(&handle
, uhandle
, hlen
))
185 return ERR_PTR(-EFAULT
);
186 if (handle
.ha_fid
.fid_len
!=
187 sizeof(handle
.ha_fid
) - sizeof(handle
.ha_fid
.fid_len
))
188 return ERR_PTR(-EINVAL
);
190 memset(&fid
, 0, sizeof(struct fid
));
191 fid
.ino
= handle
.ha_fid
.fid_ino
;
192 fid
.gen
= handle
.ha_fid
.fid_gen
;
194 return exportfs_decode_fh(parfilp
->f_path
.mnt
, (struct fid
*)&fid
, 3,
195 FILEID_INO32_GEN
| XFS_FILEID_TYPE_64FLAG
,
196 xfs_handle_acceptable
, NULL
);
199 STATIC
struct dentry
*
200 xfs_handlereq_to_dentry(
201 struct file
*parfilp
,
202 xfs_fsop_handlereq_t
*hreq
)
204 return xfs_handle_to_dentry(parfilp
, hreq
->ihandle
, hreq
->ihandlen
);
209 struct file
*parfilp
,
210 xfs_fsop_handlereq_t
*hreq
)
212 const struct cred
*cred
= current_cred();
218 struct dentry
*dentry
;
220 if (!capable(CAP_SYS_ADMIN
))
221 return -XFS_ERROR(EPERM
);
223 dentry
= xfs_handlereq_to_dentry(parfilp
, hreq
);
225 return PTR_ERR(dentry
);
226 inode
= dentry
->d_inode
;
228 /* Restrict xfs_open_by_handle to directories & regular files. */
229 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
))) {
230 error
= -XFS_ERROR(EPERM
);
234 #if BITS_PER_LONG != 32
235 hreq
->oflags
|= O_LARGEFILE
;
238 /* Put open permission in namei format. */
239 permflag
= hreq
->oflags
;
240 if ((permflag
+1) & O_ACCMODE
)
242 if (permflag
& O_TRUNC
)
245 if ((!(permflag
& O_APPEND
) || (permflag
& O_TRUNC
)) &&
246 (permflag
& FMODE_WRITE
) && IS_APPEND(inode
)) {
247 error
= -XFS_ERROR(EPERM
);
251 if ((permflag
& FMODE_WRITE
) && IS_IMMUTABLE(inode
)) {
252 error
= -XFS_ERROR(EACCES
);
256 /* Can't write directories. */
257 if (S_ISDIR(inode
->i_mode
) && (permflag
& FMODE_WRITE
)) {
258 error
= -XFS_ERROR(EISDIR
);
262 fd
= get_unused_fd();
268 filp
= dentry_open(dentry
, mntget(parfilp
->f_path
.mnt
),
272 return PTR_ERR(filp
);
275 if (inode
->i_mode
& S_IFREG
) {
276 filp
->f_flags
|= O_NOATIME
;
277 filp
->f_mode
|= FMODE_NOCMTIME
;
280 fd_install(fd
, filp
);
289 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
290 * unused first argument.
305 if (len
> (unsigned) buflen
)
307 if (copy_to_user(buffer
, link
, len
))
315 xfs_readlink_by_handle(
316 struct file
*parfilp
,
317 xfs_fsop_handlereq_t
*hreq
)
319 struct dentry
*dentry
;
324 if (!capable(CAP_SYS_ADMIN
))
325 return -XFS_ERROR(EPERM
);
327 dentry
= xfs_handlereq_to_dentry(parfilp
, hreq
);
329 return PTR_ERR(dentry
);
331 /* Restrict this handle operation to symlinks only. */
332 if (!S_ISLNK(dentry
->d_inode
->i_mode
)) {
333 error
= -XFS_ERROR(EINVAL
);
337 if (copy_from_user(&olen
, hreq
->ohandlen
, sizeof(__u32
))) {
338 error
= -XFS_ERROR(EFAULT
);
342 link
= kmalloc(MAXPATHLEN
+1, GFP_KERNEL
);
344 error
= -XFS_ERROR(ENOMEM
);
348 error
= -xfs_readlink(XFS_I(dentry
->d_inode
), link
);
351 error
= do_readlink(hreq
->ohandle
, olen
, link
);
363 xfs_fssetdm_by_handle(
364 struct file
*parfilp
,
368 struct fsdmidata fsd
;
369 xfs_fsop_setdm_handlereq_t dmhreq
;
370 struct dentry
*dentry
;
372 if (!capable(CAP_MKNOD
))
373 return -XFS_ERROR(EPERM
);
374 if (copy_from_user(&dmhreq
, arg
, sizeof(xfs_fsop_setdm_handlereq_t
)))
375 return -XFS_ERROR(EFAULT
);
377 dentry
= xfs_handlereq_to_dentry(parfilp
, &dmhreq
.hreq
);
379 return PTR_ERR(dentry
);
381 if (IS_IMMUTABLE(dentry
->d_inode
) || IS_APPEND(dentry
->d_inode
)) {
382 error
= -XFS_ERROR(EPERM
);
386 if (copy_from_user(&fsd
, dmhreq
.data
, sizeof(fsd
))) {
387 error
= -XFS_ERROR(EFAULT
);
391 error
= -xfs_set_dmattrs(XFS_I(dentry
->d_inode
), fsd
.fsd_dmevmask
,
400 xfs_attrlist_by_handle(
401 struct file
*parfilp
,
405 attrlist_cursor_kern_t
*cursor
;
406 xfs_fsop_attrlist_handlereq_t al_hreq
;
407 struct dentry
*dentry
;
410 if (!capable(CAP_SYS_ADMIN
))
411 return -XFS_ERROR(EPERM
);
412 if (copy_from_user(&al_hreq
, arg
, sizeof(xfs_fsop_attrlist_handlereq_t
)))
413 return -XFS_ERROR(EFAULT
);
414 if (al_hreq
.buflen
> XATTR_LIST_MAX
)
415 return -XFS_ERROR(EINVAL
);
418 * Reject flags, only allow namespaces.
420 if (al_hreq
.flags
& ~(ATTR_ROOT
| ATTR_SECURE
))
421 return -XFS_ERROR(EINVAL
);
423 dentry
= xfs_handlereq_to_dentry(parfilp
, &al_hreq
.hreq
);
425 return PTR_ERR(dentry
);
427 kbuf
= kmalloc(al_hreq
.buflen
, GFP_KERNEL
);
431 cursor
= (attrlist_cursor_kern_t
*)&al_hreq
.pos
;
432 error
= -xfs_attr_list(XFS_I(dentry
->d_inode
), kbuf
, al_hreq
.buflen
,
433 al_hreq
.flags
, cursor
);
437 if (copy_to_user(al_hreq
.buffer
, kbuf
, al_hreq
.buflen
))
448 xfs_attrmulti_attr_get(
458 if (*len
> XATTR_SIZE_MAX
)
460 kbuf
= kmalloc(*len
, GFP_KERNEL
);
464 error
= xfs_attr_get(XFS_I(inode
), name
, kbuf
, (int *)len
, flags
);
468 if (copy_to_user(ubuf
, kbuf
, *len
))
477 xfs_attrmulti_attr_set(
480 const char __user
*ubuf
,
487 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
489 if (len
> XATTR_SIZE_MAX
)
492 kbuf
= memdup_user(ubuf
, len
);
494 return PTR_ERR(kbuf
);
496 error
= xfs_attr_set(XFS_I(inode
), name
, kbuf
, len
, flags
);
502 xfs_attrmulti_attr_remove(
507 if (IS_IMMUTABLE(inode
) || IS_APPEND(inode
))
509 return xfs_attr_remove(XFS_I(inode
), name
, flags
);
513 xfs_attrmulti_by_handle(
514 struct file
*parfilp
,
518 xfs_attr_multiop_t
*ops
;
519 xfs_fsop_attrmulti_handlereq_t am_hreq
;
520 struct dentry
*dentry
;
521 unsigned int i
, size
;
524 if (!capable(CAP_SYS_ADMIN
))
525 return -XFS_ERROR(EPERM
);
526 if (copy_from_user(&am_hreq
, arg
, sizeof(xfs_fsop_attrmulti_handlereq_t
)))
527 return -XFS_ERROR(EFAULT
);
529 dentry
= xfs_handlereq_to_dentry(parfilp
, &am_hreq
.hreq
);
531 return PTR_ERR(dentry
);
534 size
= am_hreq
.opcount
* sizeof(xfs_attr_multiop_t
);
535 if (!size
|| size
> 16 * PAGE_SIZE
)
538 ops
= memdup_user(am_hreq
.ops
, size
);
540 error
= PTR_ERR(ops
);
544 attr_name
= kmalloc(MAXNAMELEN
, GFP_KERNEL
);
549 for (i
= 0; i
< am_hreq
.opcount
; i
++) {
550 ops
[i
].am_error
= strncpy_from_user(attr_name
,
551 ops
[i
].am_attrname
, MAXNAMELEN
);
552 if (ops
[i
].am_error
== 0 || ops
[i
].am_error
== MAXNAMELEN
)
554 if (ops
[i
].am_error
< 0)
557 switch (ops
[i
].am_opcode
) {
559 ops
[i
].am_error
= xfs_attrmulti_attr_get(
560 dentry
->d_inode
, attr_name
,
561 ops
[i
].am_attrvalue
, &ops
[i
].am_length
,
565 ops
[i
].am_error
= mnt_want_write(parfilp
->f_path
.mnt
);
568 ops
[i
].am_error
= xfs_attrmulti_attr_set(
569 dentry
->d_inode
, attr_name
,
570 ops
[i
].am_attrvalue
, ops
[i
].am_length
,
572 mnt_drop_write(parfilp
->f_path
.mnt
);
575 ops
[i
].am_error
= mnt_want_write(parfilp
->f_path
.mnt
);
578 ops
[i
].am_error
= xfs_attrmulti_attr_remove(
579 dentry
->d_inode
, attr_name
,
581 mnt_drop_write(parfilp
->f_path
.mnt
);
584 ops
[i
].am_error
= EINVAL
;
588 if (copy_to_user(am_hreq
.ops
, ops
, size
))
589 error
= XFS_ERROR(EFAULT
);
601 struct xfs_inode
*ip
,
612 * Only allow the sys admin to reserve space unless
613 * unwritten extents are enabled.
615 if (!xfs_sb_version_hasextflgbit(&ip
->i_mount
->m_sb
) &&
616 !capable(CAP_SYS_ADMIN
))
617 return -XFS_ERROR(EPERM
);
619 if (inode
->i_flags
& (S_IMMUTABLE
|S_APPEND
))
620 return -XFS_ERROR(EPERM
);
622 if (!(filp
->f_mode
& FMODE_WRITE
))
623 return -XFS_ERROR(EBADF
);
625 if (!S_ISREG(inode
->i_mode
))
626 return -XFS_ERROR(EINVAL
);
628 if (filp
->f_flags
& (O_NDELAY
|O_NONBLOCK
))
629 attr_flags
|= XFS_ATTR_NONBLOCK
;
630 if (ioflags
& IO_INVIS
)
631 attr_flags
|= XFS_ATTR_DMI
;
633 error
= xfs_change_file_space(ip
, cmd
, bf
, filp
->f_pos
, attr_flags
);
643 xfs_fsop_bulkreq_t bulkreq
;
644 int count
; /* # of records returned */
645 xfs_ino_t inlast
; /* last inode number */
649 /* done = 1 if there are more stats to get and if bulkstat */
650 /* should be called again (unused here, but used in dmapi) */
652 if (!capable(CAP_SYS_ADMIN
))
655 if (XFS_FORCED_SHUTDOWN(mp
))
656 return -XFS_ERROR(EIO
);
658 if (copy_from_user(&bulkreq
, arg
, sizeof(xfs_fsop_bulkreq_t
)))
659 return -XFS_ERROR(EFAULT
);
661 if (copy_from_user(&inlast
, bulkreq
.lastip
, sizeof(__s64
)))
662 return -XFS_ERROR(EFAULT
);
664 if ((count
= bulkreq
.icount
) <= 0)
665 return -XFS_ERROR(EINVAL
);
667 if (bulkreq
.ubuffer
== NULL
)
668 return -XFS_ERROR(EINVAL
);
670 if (cmd
== XFS_IOC_FSINUMBERS
)
671 error
= xfs_inumbers(mp
, &inlast
, &count
,
672 bulkreq
.ubuffer
, xfs_inumbers_fmt
);
673 else if (cmd
== XFS_IOC_FSBULKSTAT_SINGLE
)
674 error
= xfs_bulkstat_single(mp
, &inlast
,
675 bulkreq
.ubuffer
, &done
);
676 else /* XFS_IOC_FSBULKSTAT */
677 error
= xfs_bulkstat(mp
, &inlast
, &count
,
678 (bulkstat_one_pf
)xfs_bulkstat_one
, NULL
,
679 sizeof(xfs_bstat_t
), bulkreq
.ubuffer
,
680 BULKSTAT_FG_QUICK
, &done
);
685 if (bulkreq
.ocount
!= NULL
) {
686 if (copy_to_user(bulkreq
.lastip
, &inlast
,
688 return -XFS_ERROR(EFAULT
);
690 if (copy_to_user(bulkreq
.ocount
, &count
, sizeof(count
)))
691 return -XFS_ERROR(EFAULT
);
698 xfs_ioc_fsgeometry_v1(
702 xfs_fsop_geom_t fsgeo
;
705 error
= xfs_fs_geometry(mp
, &fsgeo
, 3);
710 * Caller should have passed an argument of type
711 * xfs_fsop_geom_v1_t. This is a proper subset of the
712 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
714 if (copy_to_user(arg
, &fsgeo
, sizeof(xfs_fsop_geom_v1_t
)))
715 return -XFS_ERROR(EFAULT
);
724 xfs_fsop_geom_t fsgeo
;
727 error
= xfs_fs_geometry(mp
, &fsgeo
, 4);
731 if (copy_to_user(arg
, &fsgeo
, sizeof(fsgeo
)))
732 return -XFS_ERROR(EFAULT
);
737 * Linux extended inode flags interface.
741 xfs_merge_ioc_xflags(
745 unsigned int xflags
= start
;
747 if (flags
& FS_IMMUTABLE_FL
)
748 xflags
|= XFS_XFLAG_IMMUTABLE
;
750 xflags
&= ~XFS_XFLAG_IMMUTABLE
;
751 if (flags
& FS_APPEND_FL
)
752 xflags
|= XFS_XFLAG_APPEND
;
754 xflags
&= ~XFS_XFLAG_APPEND
;
755 if (flags
& FS_SYNC_FL
)
756 xflags
|= XFS_XFLAG_SYNC
;
758 xflags
&= ~XFS_XFLAG_SYNC
;
759 if (flags
& FS_NOATIME_FL
)
760 xflags
|= XFS_XFLAG_NOATIME
;
762 xflags
&= ~XFS_XFLAG_NOATIME
;
763 if (flags
& FS_NODUMP_FL
)
764 xflags
|= XFS_XFLAG_NODUMP
;
766 xflags
&= ~XFS_XFLAG_NODUMP
;
775 unsigned int flags
= 0;
777 if (di_flags
& XFS_DIFLAG_IMMUTABLE
)
778 flags
|= FS_IMMUTABLE_FL
;
779 if (di_flags
& XFS_DIFLAG_APPEND
)
780 flags
|= FS_APPEND_FL
;
781 if (di_flags
& XFS_DIFLAG_SYNC
)
783 if (di_flags
& XFS_DIFLAG_NOATIME
)
784 flags
|= FS_NOATIME_FL
;
785 if (di_flags
& XFS_DIFLAG_NODUMP
)
786 flags
|= FS_NODUMP_FL
;
798 memset(&fa
, 0, sizeof(struct fsxattr
));
800 xfs_ilock(ip
, XFS_ILOCK_SHARED
);
801 fa
.fsx_xflags
= xfs_ip2xflags(ip
);
802 fa
.fsx_extsize
= ip
->i_d
.di_extsize
<< ip
->i_mount
->m_sb
.sb_blocklog
;
803 fa
.fsx_projid
= ip
->i_d
.di_projid
;
807 if (ip
->i_afp
->if_flags
& XFS_IFEXTENTS
)
808 fa
.fsx_nextents
= ip
->i_afp
->if_bytes
/
809 sizeof(xfs_bmbt_rec_t
);
811 fa
.fsx_nextents
= ip
->i_d
.di_anextents
;
815 if (ip
->i_df
.if_flags
& XFS_IFEXTENTS
)
816 fa
.fsx_nextents
= ip
->i_df
.if_bytes
/
817 sizeof(xfs_bmbt_rec_t
);
819 fa
.fsx_nextents
= ip
->i_d
.di_nextents
;
821 xfs_iunlock(ip
, XFS_ILOCK_SHARED
);
823 if (copy_to_user(arg
, &fa
, sizeof(fa
)))
830 struct xfs_inode
*ip
,
833 unsigned int di_flags
;
835 /* can't set PREALLOC this way, just preserve it */
836 di_flags
= (ip
->i_d
.di_flags
& XFS_DIFLAG_PREALLOC
);
837 if (xflags
& XFS_XFLAG_IMMUTABLE
)
838 di_flags
|= XFS_DIFLAG_IMMUTABLE
;
839 if (xflags
& XFS_XFLAG_APPEND
)
840 di_flags
|= XFS_DIFLAG_APPEND
;
841 if (xflags
& XFS_XFLAG_SYNC
)
842 di_flags
|= XFS_DIFLAG_SYNC
;
843 if (xflags
& XFS_XFLAG_NOATIME
)
844 di_flags
|= XFS_DIFLAG_NOATIME
;
845 if (xflags
& XFS_XFLAG_NODUMP
)
846 di_flags
|= XFS_DIFLAG_NODUMP
;
847 if (xflags
& XFS_XFLAG_PROJINHERIT
)
848 di_flags
|= XFS_DIFLAG_PROJINHERIT
;
849 if (xflags
& XFS_XFLAG_NODEFRAG
)
850 di_flags
|= XFS_DIFLAG_NODEFRAG
;
851 if (xflags
& XFS_XFLAG_FILESTREAM
)
852 di_flags
|= XFS_DIFLAG_FILESTREAM
;
853 if ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFDIR
) {
854 if (xflags
& XFS_XFLAG_RTINHERIT
)
855 di_flags
|= XFS_DIFLAG_RTINHERIT
;
856 if (xflags
& XFS_XFLAG_NOSYMLINKS
)
857 di_flags
|= XFS_DIFLAG_NOSYMLINKS
;
858 if (xflags
& XFS_XFLAG_EXTSZINHERIT
)
859 di_flags
|= XFS_DIFLAG_EXTSZINHERIT
;
860 } else if ((ip
->i_d
.di_mode
& S_IFMT
) == S_IFREG
) {
861 if (xflags
& XFS_XFLAG_REALTIME
)
862 di_flags
|= XFS_DIFLAG_REALTIME
;
863 if (xflags
& XFS_XFLAG_EXTSIZE
)
864 di_flags
|= XFS_DIFLAG_EXTSIZE
;
867 ip
->i_d
.di_flags
= di_flags
;
871 xfs_diflags_to_linux(
872 struct xfs_inode
*ip
)
874 struct inode
*inode
= VFS_I(ip
);
875 unsigned int xflags
= xfs_ip2xflags(ip
);
877 if (xflags
& XFS_XFLAG_IMMUTABLE
)
878 inode
->i_flags
|= S_IMMUTABLE
;
880 inode
->i_flags
&= ~S_IMMUTABLE
;
881 if (xflags
& XFS_XFLAG_APPEND
)
882 inode
->i_flags
|= S_APPEND
;
884 inode
->i_flags
&= ~S_APPEND
;
885 if (xflags
& XFS_XFLAG_SYNC
)
886 inode
->i_flags
|= S_SYNC
;
888 inode
->i_flags
&= ~S_SYNC
;
889 if (xflags
& XFS_XFLAG_NOATIME
)
890 inode
->i_flags
|= S_NOATIME
;
892 inode
->i_flags
&= ~S_NOATIME
;
896 #define FSX_EXTSIZE 2
898 #define FSX_NONBLOCK 8
906 struct xfs_mount
*mp
= ip
->i_mount
;
907 struct xfs_trans
*tp
;
908 unsigned int lock_flags
= 0;
909 struct xfs_dquot
*udqp
= NULL
;
910 struct xfs_dquot
*gdqp
= NULL
;
911 struct xfs_dquot
*olddquot
= NULL
;
914 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_vop_dqalloc(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_QUOTA_RUNNING(mp
) &&
966 XFS_IS_PQUOTA_ON(mp
) &&
967 ip
->i_d
.di_projid
!= fa
->fsx_projid
) {
969 code
= xfs_qm_vop_chown_reserve(tp
, ip
, udqp
, gdqp
,
970 capable(CAP_FOWNER
) ?
971 XFS_QMOPT_FORCE_RES
: 0);
972 if (code
) /* out of quota */
977 if (mask
& FSX_EXTSIZE
) {
979 * Can't change extent size if any extents are allocated.
981 if (ip
->i_d
.di_nextents
&&
982 ((ip
->i_d
.di_extsize
<< mp
->m_sb
.sb_blocklog
) !=
984 code
= XFS_ERROR(EINVAL
); /* EFBIG? */
989 * Extent size must be a multiple of the appropriate block
990 * size, if set at all.
992 if (fa
->fsx_extsize
!= 0) {
995 if (XFS_IS_REALTIME_INODE(ip
) ||
996 ((mask
& FSX_XFLAGS
) &&
997 (fa
->fsx_xflags
& XFS_XFLAG_REALTIME
))) {
998 size
= mp
->m_sb
.sb_rextsize
<<
999 mp
->m_sb
.sb_blocklog
;
1001 size
= mp
->m_sb
.sb_blocksize
;
1004 if (fa
->fsx_extsize
% size
) {
1005 code
= XFS_ERROR(EINVAL
);
1012 if (mask
& FSX_XFLAGS
) {
1014 * Can't change realtime flag if any extents are allocated.
1016 if ((ip
->i_d
.di_nextents
|| ip
->i_delayed_blks
) &&
1017 (XFS_IS_REALTIME_INODE(ip
)) !=
1018 (fa
->fsx_xflags
& XFS_XFLAG_REALTIME
)) {
1019 code
= XFS_ERROR(EINVAL
); /* EFBIG? */
1024 * If realtime flag is set then must have realtime data.
1026 if ((fa
->fsx_xflags
& XFS_XFLAG_REALTIME
)) {
1027 if ((mp
->m_sb
.sb_rblocks
== 0) ||
1028 (mp
->m_sb
.sb_rextsize
== 0) ||
1029 (ip
->i_d
.di_extsize
% mp
->m_sb
.sb_rextsize
)) {
1030 code
= XFS_ERROR(EINVAL
);
1036 * Can't modify an immutable/append-only file unless
1037 * we have appropriate permission.
1039 if ((ip
->i_d
.di_flags
&
1040 (XFS_DIFLAG_IMMUTABLE
|XFS_DIFLAG_APPEND
) ||
1042 (XFS_XFLAG_IMMUTABLE
| XFS_XFLAG_APPEND
))) &&
1043 !capable(CAP_LINUX_IMMUTABLE
)) {
1044 code
= XFS_ERROR(EPERM
);
1049 xfs_trans_ijoin(tp
, ip
, lock_flags
);
1050 xfs_trans_ihold(tp
, ip
);
1053 * Change file ownership. Must be the owner or privileged.
1055 if (mask
& FSX_PROJID
) {
1057 * CAP_FSETID overrides the following restrictions:
1059 * The set-user-ID and set-group-ID bits of a file will be
1060 * cleared upon successful return from chown()
1062 if ((ip
->i_d
.di_mode
& (S_ISUID
|S_ISGID
)) &&
1063 !capable(CAP_FSETID
))
1064 ip
->i_d
.di_mode
&= ~(S_ISUID
|S_ISGID
);
1067 * Change the ownerships and register quota modifications
1068 * in the transaction.
1070 if (ip
->i_d
.di_projid
!= fa
->fsx_projid
) {
1071 if (XFS_IS_QUOTA_RUNNING(mp
) && XFS_IS_PQUOTA_ON(mp
)) {
1072 olddquot
= xfs_qm_vop_chown(tp
, ip
,
1073 &ip
->i_gdquot
, gdqp
);
1075 ip
->i_d
.di_projid
= fa
->fsx_projid
;
1078 * We may have to rev the inode as well as
1079 * the superblock version number since projids didn't
1080 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1082 if (ip
->i_d
.di_version
== 1)
1083 xfs_bump_ino_vers2(tp
, ip
);
1088 if (mask
& FSX_EXTSIZE
)
1089 ip
->i_d
.di_extsize
= fa
->fsx_extsize
>> mp
->m_sb
.sb_blocklog
;
1090 if (mask
& FSX_XFLAGS
) {
1091 xfs_set_diflags(ip
, fa
->fsx_xflags
);
1092 xfs_diflags_to_linux(ip
);
1095 xfs_trans_log_inode(tp
, ip
, XFS_ILOG_CORE
);
1096 xfs_ichgtime(ip
, XFS_ICHGTIME_CHG
);
1098 XFS_STATS_INC(xs_ig_attrchg
);
1101 * If this is a synchronous mount, make sure that the
1102 * transaction goes to disk before returning to the user.
1103 * This is slightly sub-optimal in that truncates require
1104 * two sync transactions instead of one for wsync filesystems.
1105 * One for the truncate and one for the timestamps since we
1106 * don't want to change the timestamps unless we're sure the
1107 * truncate worked. Truncates are less than 1% of the laddis
1108 * mix so this probably isn't worth the trouble to optimize.
1110 if (mp
->m_flags
& XFS_MOUNT_WSYNC
)
1111 xfs_trans_set_sync(tp
);
1112 code
= xfs_trans_commit(tp
, 0);
1113 xfs_iunlock(ip
, lock_flags
);
1116 * Release any dquot(s) the inode had kept before chown.
1118 xfs_qm_dqrele(olddquot
);
1119 xfs_qm_dqrele(udqp
);
1120 xfs_qm_dqrele(gdqp
);
1125 if (DM_EVENT_ENABLED(ip
, DM_EVENT_ATTRIBUTE
)) {
1126 XFS_SEND_NAMESP(mp
, DM_EVENT_ATTRIBUTE
, ip
, DM_RIGHT_NULL
,
1127 NULL
, DM_RIGHT_NULL
, NULL
, NULL
, 0, 0,
1128 (mask
& FSX_NONBLOCK
) ? DM_FLAGS_NDELAY
: 0);
1134 xfs_qm_dqrele(udqp
);
1135 xfs_qm_dqrele(gdqp
);
1136 xfs_trans_cancel(tp
, 0);
1138 xfs_iunlock(ip
, lock_flags
);
1151 if (copy_from_user(&fa
, arg
, sizeof(fa
)))
1154 mask
= FSX_XFLAGS
| FSX_EXTSIZE
| FSX_PROJID
;
1155 if (filp
->f_flags
& (O_NDELAY
|O_NONBLOCK
))
1156 mask
|= FSX_NONBLOCK
;
1158 return -xfs_ioctl_setattr(ip
, &fa
, mask
);
1168 flags
= xfs_di2lxflags(ip
->i_d
.di_flags
);
1169 if (copy_to_user(arg
, &flags
, sizeof(flags
)))
1184 if (copy_from_user(&flags
, arg
, sizeof(flags
)))
1187 if (flags
& ~(FS_IMMUTABLE_FL
| FS_APPEND_FL
| \
1188 FS_NOATIME_FL
| FS_NODUMP_FL
| \
1193 if (filp
->f_flags
& (O_NDELAY
|O_NONBLOCK
))
1194 mask
|= FSX_NONBLOCK
;
1195 fa
.fsx_xflags
= xfs_merge_ioc_xflags(flags
, xfs_ip2xflags(ip
));
1197 return -xfs_ioctl_setattr(ip
, &fa
, mask
);
1201 xfs_getbmap_format(void **ap
, struct getbmapx
*bmv
, int *full
)
1203 struct getbmap __user
*base
= *ap
;
1205 /* copy only getbmap portion (not getbmapx) */
1206 if (copy_to_user(base
, bmv
, sizeof(struct getbmap
)))
1207 return XFS_ERROR(EFAULT
);
1209 *ap
+= sizeof(struct getbmap
);
1215 struct xfs_inode
*ip
,
1220 struct getbmapx bmx
;
1223 if (copy_from_user(&bmx
, arg
, sizeof(struct getbmapx
)))
1224 return -XFS_ERROR(EFAULT
);
1226 if (bmx
.bmv_count
< 2)
1227 return -XFS_ERROR(EINVAL
);
1229 bmx
.bmv_iflags
= (cmd
== XFS_IOC_GETBMAPA
? BMV_IF_ATTRFORK
: 0);
1230 if (ioflags
& IO_INVIS
)
1231 bmx
.bmv_iflags
|= BMV_IF_NO_DMAPI_READ
;
1233 error
= xfs_getbmap(ip
, &bmx
, xfs_getbmap_format
,
1234 (struct getbmap
*)arg
+1);
1238 /* copy back header - only size of getbmap */
1239 if (copy_to_user(arg
, &bmx
, sizeof(struct getbmap
)))
1240 return -XFS_ERROR(EFAULT
);
1245 xfs_getbmapx_format(void **ap
, struct getbmapx
*bmv
, int *full
)
1247 struct getbmapx __user
*base
= *ap
;
1249 if (copy_to_user(base
, bmv
, sizeof(struct getbmapx
)))
1250 return XFS_ERROR(EFAULT
);
1252 *ap
+= sizeof(struct getbmapx
);
1258 struct xfs_inode
*ip
,
1261 struct getbmapx bmx
;
1264 if (copy_from_user(&bmx
, arg
, sizeof(bmx
)))
1265 return -XFS_ERROR(EFAULT
);
1267 if (bmx
.bmv_count
< 2)
1268 return -XFS_ERROR(EINVAL
);
1270 if (bmx
.bmv_iflags
& (~BMV_IF_VALID
))
1271 return -XFS_ERROR(EINVAL
);
1273 error
= xfs_getbmap(ip
, &bmx
, xfs_getbmapx_format
,
1274 (struct getbmapx
*)arg
+1);
1278 /* copy back header */
1279 if (copy_to_user(arg
, &bmx
, sizeof(struct getbmapx
)))
1280 return -XFS_ERROR(EFAULT
);
1286 * Note: some of the ioctl's return positive numbers as a
1287 * byte count indicating success, such as readlink_by_handle.
1288 * So we don't "sign flip" like most other routines. This means
1289 * true errors need to be returned as a negative value.
1297 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
1298 struct xfs_inode
*ip
= XFS_I(inode
);
1299 struct xfs_mount
*mp
= ip
->i_mount
;
1300 void __user
*arg
= (void __user
*)p
;
1304 if (filp
->f_mode
& FMODE_NOCMTIME
)
1305 ioflags
|= IO_INVIS
;
1307 xfs_itrace_entry(ip
);
1310 case XFS_IOC_ALLOCSP
:
1311 case XFS_IOC_FREESP
:
1312 case XFS_IOC_RESVSP
:
1313 case XFS_IOC_UNRESVSP
:
1314 case XFS_IOC_ALLOCSP64
:
1315 case XFS_IOC_FREESP64
:
1316 case XFS_IOC_RESVSP64
:
1317 case XFS_IOC_UNRESVSP64
: {
1320 if (copy_from_user(&bf
, arg
, sizeof(bf
)))
1321 return -XFS_ERROR(EFAULT
);
1322 return xfs_ioc_space(ip
, inode
, filp
, ioflags
, cmd
, &bf
);
1324 case XFS_IOC_DIOINFO
: {
1326 xfs_buftarg_t
*target
=
1327 XFS_IS_REALTIME_INODE(ip
) ?
1328 mp
->m_rtdev_targp
: mp
->m_ddev_targp
;
1330 da
.d_mem
= da
.d_miniosz
= 1 << target
->bt_sshift
;
1331 da
.d_maxiosz
= INT_MAX
& ~(da
.d_miniosz
- 1);
1333 if (copy_to_user(arg
, &da
, sizeof(da
)))
1334 return -XFS_ERROR(EFAULT
);
1338 case XFS_IOC_FSBULKSTAT_SINGLE
:
1339 case XFS_IOC_FSBULKSTAT
:
1340 case XFS_IOC_FSINUMBERS
:
1341 return xfs_ioc_bulkstat(mp
, cmd
, arg
);
1343 case XFS_IOC_FSGEOMETRY_V1
:
1344 return xfs_ioc_fsgeometry_v1(mp
, arg
);
1346 case XFS_IOC_FSGEOMETRY
:
1347 return xfs_ioc_fsgeometry(mp
, arg
);
1349 case XFS_IOC_GETVERSION
:
1350 return put_user(inode
->i_generation
, (int __user
*)arg
);
1352 case XFS_IOC_FSGETXATTR
:
1353 return xfs_ioc_fsgetxattr(ip
, 0, arg
);
1354 case XFS_IOC_FSGETXATTRA
:
1355 return xfs_ioc_fsgetxattr(ip
, 1, arg
);
1356 case XFS_IOC_FSSETXATTR
:
1357 return xfs_ioc_fssetxattr(ip
, filp
, arg
);
1358 case XFS_IOC_GETXFLAGS
:
1359 return xfs_ioc_getxflags(ip
, arg
);
1360 case XFS_IOC_SETXFLAGS
:
1361 return xfs_ioc_setxflags(ip
, filp
, arg
);
1363 case XFS_IOC_FSSETDM
: {
1364 struct fsdmidata dmi
;
1366 if (copy_from_user(&dmi
, arg
, sizeof(dmi
)))
1367 return -XFS_ERROR(EFAULT
);
1369 error
= xfs_set_dmattrs(ip
, dmi
.fsd_dmevmask
,
1374 case XFS_IOC_GETBMAP
:
1375 case XFS_IOC_GETBMAPA
:
1376 return xfs_ioc_getbmap(ip
, ioflags
, cmd
, arg
);
1378 case XFS_IOC_GETBMAPX
:
1379 return xfs_ioc_getbmapx(ip
, arg
);
1381 case XFS_IOC_FD_TO_HANDLE
:
1382 case XFS_IOC_PATH_TO_HANDLE
:
1383 case XFS_IOC_PATH_TO_FSHANDLE
: {
1384 xfs_fsop_handlereq_t hreq
;
1386 if (copy_from_user(&hreq
, arg
, sizeof(hreq
)))
1387 return -XFS_ERROR(EFAULT
);
1388 return xfs_find_handle(cmd
, &hreq
);
1390 case XFS_IOC_OPEN_BY_HANDLE
: {
1391 xfs_fsop_handlereq_t hreq
;
1393 if (copy_from_user(&hreq
, arg
, sizeof(xfs_fsop_handlereq_t
)))
1394 return -XFS_ERROR(EFAULT
);
1395 return xfs_open_by_handle(filp
, &hreq
);
1397 case XFS_IOC_FSSETDM_BY_HANDLE
:
1398 return xfs_fssetdm_by_handle(filp
, arg
);
1400 case XFS_IOC_READLINK_BY_HANDLE
: {
1401 xfs_fsop_handlereq_t hreq
;
1403 if (copy_from_user(&hreq
, arg
, sizeof(xfs_fsop_handlereq_t
)))
1404 return -XFS_ERROR(EFAULT
);
1405 return xfs_readlink_by_handle(filp
, &hreq
);
1407 case XFS_IOC_ATTRLIST_BY_HANDLE
:
1408 return xfs_attrlist_by_handle(filp
, arg
);
1410 case XFS_IOC_ATTRMULTI_BY_HANDLE
:
1411 return xfs_attrmulti_by_handle(filp
, arg
);
1413 case XFS_IOC_SWAPEXT
: {
1414 struct xfs_swapext sxp
;
1416 if (copy_from_user(&sxp
, arg
, sizeof(xfs_swapext_t
)))
1417 return -XFS_ERROR(EFAULT
);
1418 error
= xfs_swapext(&sxp
);
1422 case XFS_IOC_FSCOUNTS
: {
1423 xfs_fsop_counts_t out
;
1425 error
= xfs_fs_counts(mp
, &out
);
1429 if (copy_to_user(arg
, &out
, sizeof(out
)))
1430 return -XFS_ERROR(EFAULT
);
1434 case XFS_IOC_SET_RESBLKS
: {
1435 xfs_fsop_resblks_t inout
;
1438 if (!capable(CAP_SYS_ADMIN
))
1441 if (copy_from_user(&inout
, arg
, sizeof(inout
)))
1442 return -XFS_ERROR(EFAULT
);
1444 /* input parameter is passed in resblks field of structure */
1446 error
= xfs_reserve_blocks(mp
, &in
, &inout
);
1450 if (copy_to_user(arg
, &inout
, sizeof(inout
)))
1451 return -XFS_ERROR(EFAULT
);
1455 case XFS_IOC_GET_RESBLKS
: {
1456 xfs_fsop_resblks_t out
;
1458 if (!capable(CAP_SYS_ADMIN
))
1461 error
= xfs_reserve_blocks(mp
, NULL
, &out
);
1465 if (copy_to_user(arg
, &out
, sizeof(out
)))
1466 return -XFS_ERROR(EFAULT
);
1471 case XFS_IOC_FSGROWFSDATA
: {
1472 xfs_growfs_data_t in
;
1474 if (copy_from_user(&in
, arg
, sizeof(in
)))
1475 return -XFS_ERROR(EFAULT
);
1477 error
= xfs_growfs_data(mp
, &in
);
1481 case XFS_IOC_FSGROWFSLOG
: {
1482 xfs_growfs_log_t in
;
1484 if (copy_from_user(&in
, arg
, sizeof(in
)))
1485 return -XFS_ERROR(EFAULT
);
1487 error
= xfs_growfs_log(mp
, &in
);
1491 case XFS_IOC_FSGROWFSRT
: {
1494 if (copy_from_user(&in
, arg
, sizeof(in
)))
1495 return -XFS_ERROR(EFAULT
);
1497 error
= xfs_growfs_rt(mp
, &in
);
1501 case XFS_IOC_GOINGDOWN
: {
1504 if (!capable(CAP_SYS_ADMIN
))
1507 if (get_user(in
, (__uint32_t __user
*)arg
))
1508 return -XFS_ERROR(EFAULT
);
1510 error
= xfs_fs_goingdown(mp
, in
);
1514 case XFS_IOC_ERROR_INJECTION
: {
1515 xfs_error_injection_t in
;
1517 if (!capable(CAP_SYS_ADMIN
))
1520 if (copy_from_user(&in
, arg
, sizeof(in
)))
1521 return -XFS_ERROR(EFAULT
);
1523 error
= xfs_errortag_add(in
.errtag
, mp
);
1527 case XFS_IOC_ERROR_CLEARALL
:
1528 if (!capable(CAP_SYS_ADMIN
))
1531 error
= xfs_errortag_clearall(mp
, 1);