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
20 #include "xfs_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
24 #include "xfs_mount.h"
25 #include "xfs_inode.h"
26 #include "xfs_ioctl.h"
27 #include "xfs_alloc.h"
28 #include "xfs_rtalloc.h"
29 #include "xfs_itable.h"
30 #include "xfs_error.h"
33 #include "xfs_bmap_util.h"
34 #include "xfs_fsops.h"
35 #include "xfs_discard.h"
36 #include "xfs_quota.h"
37 #include "xfs_export.h"
38 #include "xfs_trace.h"
39 #include "xfs_icache.h"
40 #include "xfs_symlink.h"
41 #include "xfs_trans.h"
45 #include <linux/capability.h>
46 #include <linux/dcache.h>
47 #include <linux/mount.h>
48 #include <linux/namei.h>
49 #include <linux/pagemap.h>
50 #include <linux/slab.h>
51 #include <linux/exportfs.h>
54 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
55 * a file or fs handle.
57 * XFS_IOC_PATH_TO_FSHANDLE
58 * returns fs handle for a mount point or path within that mount point
59 * XFS_IOC_FD_TO_HANDLE
60 * returns full handle for a FD opened in user space
61 * XFS_IOC_PATH_TO_HANDLE
62 * returns full handle for a path
67 xfs_fsop_handlereq_t *hreq)
77 if (cmd == XFS_IOC_FD_TO_HANDLE) {
81 inode = file_inode(f.file);
83 error = user_lpath((const char __user *)hreq->path, &path);
86 inode = d_inode(path.dentry);
91 * We can only generate handles for inodes residing on a XFS filesystem,
92 * and only for regular files, directories or symbolic links.
95 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
99 if (!S_ISREG(inode->i_mode) &&
100 !S_ISDIR(inode->i_mode) &&
101 !S_ISLNK(inode->i_mode))
105 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
107 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
109 * This handle only contains an fsid, zero the rest.
111 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
112 hsize = sizeof(xfs_fsid_t);
114 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
115 sizeof(handle.ha_fid.fid_len);
116 handle.ha_fid.fid_pad = 0;
117 handle.ha_fid.fid_gen = inode->i_generation;
118 handle.ha_fid.fid_ino = ip->i_ino;
120 hsize = XFS_HSIZE(handle);
124 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
125 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
131 if (cmd == XFS_IOC_FD_TO_HANDLE)
139 * No need to do permission checks on the various pathname components
140 * as the handle operations are privileged.
143 xfs_handle_acceptable(
145 struct dentry *dentry)
151 * Convert userspace handle data into a dentry.
154 xfs_handle_to_dentry(
155 struct file *parfilp,
156 void __user *uhandle,
160 struct xfs_fid64 fid;
163 * Only allow handle opens under a directory.
165 if (!S_ISDIR(file_inode(parfilp)->i_mode))
166 return ERR_PTR(-ENOTDIR);
168 if (hlen != sizeof(xfs_handle_t))
169 return ERR_PTR(-EINVAL);
170 if (copy_from_user(&handle, uhandle, hlen))
171 return ERR_PTR(-EFAULT);
172 if (handle.ha_fid.fid_len !=
173 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
174 return ERR_PTR(-EINVAL);
176 memset(&fid, 0, sizeof(struct fid));
177 fid.ino = handle.ha_fid.fid_ino;
178 fid.gen = handle.ha_fid.fid_gen;
180 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
181 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
182 xfs_handle_acceptable, NULL);
185 STATIC struct dentry *
186 xfs_handlereq_to_dentry(
187 struct file *parfilp,
188 xfs_fsop_handlereq_t *hreq)
190 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
195 struct file *parfilp,
196 xfs_fsop_handlereq_t *hreq)
198 const struct cred *cred = current_cred();
204 struct dentry *dentry;
208 if (!capable(CAP_SYS_ADMIN))
211 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
213 return PTR_ERR(dentry);
214 inode = d_inode(dentry);
216 /* Restrict xfs_open_by_handle to directories & regular files. */
217 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
222 #if BITS_PER_LONG != 32
223 hreq->oflags |= O_LARGEFILE;
226 permflag = hreq->oflags;
227 fmode = OPEN_FMODE(permflag);
228 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
229 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
234 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
239 /* Can't write directories. */
240 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
245 fd = get_unused_fd_flags(0);
251 path.mnt = parfilp->f_path.mnt;
252 path.dentry = dentry;
253 filp = dentry_open(&path, hreq->oflags, cred);
257 return PTR_ERR(filp);
260 if (S_ISREG(inode->i_mode)) {
261 filp->f_flags |= O_NOATIME;
262 filp->f_mode |= FMODE_NOCMTIME;
265 fd_install(fd, filp);
274 xfs_readlink_by_handle(
275 struct file *parfilp,
276 xfs_fsop_handlereq_t *hreq)
278 struct dentry *dentry;
282 if (!capable(CAP_SYS_ADMIN))
285 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
287 return PTR_ERR(dentry);
289 /* Restrict this handle operation to symlinks only. */
290 if (!d_inode(dentry)->i_op->readlink) {
295 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
300 error = d_inode(dentry)->i_op->readlink(dentry, hreq->ohandle, olen);
313 xfs_mount_t *mp = ip->i_mount;
317 if (!capable(CAP_SYS_ADMIN))
320 if (XFS_FORCED_SHUTDOWN(mp))
323 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
327 xfs_ilock(ip, XFS_ILOCK_EXCL);
328 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
330 ip->i_d.di_dmevmask = evmask;
331 ip->i_d.di_dmstate = state;
333 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
334 error = xfs_trans_commit(tp);
340 xfs_fssetdm_by_handle(
341 struct file *parfilp,
345 struct fsdmidata fsd;
346 xfs_fsop_setdm_handlereq_t dmhreq;
347 struct dentry *dentry;
349 if (!capable(CAP_MKNOD))
351 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
354 error = mnt_want_write_file(parfilp);
358 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
359 if (IS_ERR(dentry)) {
360 mnt_drop_write_file(parfilp);
361 return PTR_ERR(dentry);
364 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
369 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
374 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
378 mnt_drop_write_file(parfilp);
384 xfs_attrlist_by_handle(
385 struct file *parfilp,
389 attrlist_cursor_kern_t *cursor;
390 xfs_fsop_attrlist_handlereq_t al_hreq;
391 struct dentry *dentry;
394 if (!capable(CAP_SYS_ADMIN))
396 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
398 if (al_hreq.buflen < sizeof(struct attrlist) ||
399 al_hreq.buflen > XFS_XATTR_LIST_MAX)
403 * Reject flags, only allow namespaces.
405 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
408 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
410 return PTR_ERR(dentry);
412 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
416 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
417 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
418 al_hreq.flags, cursor);
422 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
433 xfs_attrmulti_attr_get(
436 unsigned char __user *ubuf,
443 if (*len > XFS_XATTR_SIZE_MAX)
445 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
449 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
453 if (copy_to_user(ubuf, kbuf, *len))
462 xfs_attrmulti_attr_set(
465 const unsigned char __user *ubuf,
472 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
474 if (len > XFS_XATTR_SIZE_MAX)
477 kbuf = memdup_user(ubuf, len);
479 return PTR_ERR(kbuf);
481 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
483 xfs_forget_acl(inode, name, flags);
489 xfs_attrmulti_attr_remove(
496 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
498 error = xfs_attr_remove(XFS_I(inode), name, flags);
500 xfs_forget_acl(inode, name, flags);
505 xfs_attrmulti_by_handle(
506 struct file *parfilp,
510 xfs_attr_multiop_t *ops;
511 xfs_fsop_attrmulti_handlereq_t am_hreq;
512 struct dentry *dentry;
513 unsigned int i, size;
514 unsigned char *attr_name;
516 if (!capable(CAP_SYS_ADMIN))
518 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
522 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
525 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
527 return PTR_ERR(dentry);
530 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
531 if (!size || size > 16 * PAGE_SIZE)
534 ops = memdup_user(am_hreq.ops, size);
536 error = PTR_ERR(ops);
541 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
546 for (i = 0; i < am_hreq.opcount; i++) {
547 ops[i].am_error = strncpy_from_user((char *)attr_name,
548 ops[i].am_attrname, MAXNAMELEN);
549 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
551 if (ops[i].am_error < 0)
554 switch (ops[i].am_opcode) {
556 ops[i].am_error = xfs_attrmulti_attr_get(
557 d_inode(dentry), attr_name,
558 ops[i].am_attrvalue, &ops[i].am_length,
562 ops[i].am_error = mnt_want_write_file(parfilp);
565 ops[i].am_error = xfs_attrmulti_attr_set(
566 d_inode(dentry), attr_name,
567 ops[i].am_attrvalue, ops[i].am_length,
569 mnt_drop_write_file(parfilp);
572 ops[i].am_error = mnt_want_write_file(parfilp);
575 ops[i].am_error = xfs_attrmulti_attr_remove(
576 d_inode(dentry), attr_name,
578 mnt_drop_write_file(parfilp);
581 ops[i].am_error = -EINVAL;
585 if (copy_to_user(am_hreq.ops, ops, size))
598 struct xfs_inode *ip,
606 enum xfs_prealloc_flags flags = 0;
607 uint iolock = XFS_IOLOCK_EXCL;
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))
618 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
621 if (!(filp->f_mode & FMODE_WRITE))
624 if (!S_ISREG(inode->i_mode))
627 if (filp->f_flags & O_DSYNC)
628 flags |= XFS_PREALLOC_SYNC;
629 if (ioflags & XFS_IO_INVIS)
630 flags |= XFS_PREALLOC_INVISIBLE;
632 error = mnt_want_write_file(filp);
636 xfs_ilock(ip, iolock);
637 error = xfs_break_layouts(inode, &iolock, false);
641 xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
642 iolock |= XFS_MMAPLOCK_EXCL;
644 switch (bf->l_whence) {
648 bf->l_start += filp->f_pos;
651 bf->l_start += XFS_ISIZE(ip);
659 * length of <= 0 for resv/unresv/zero is invalid. length for
660 * alloc/free is ignored completely and we have no idea what userspace
661 * might have set it to, so set it to zero to allow range
665 case XFS_IOC_ZERO_RANGE:
667 case XFS_IOC_RESVSP64:
668 case XFS_IOC_UNRESVSP:
669 case XFS_IOC_UNRESVSP64:
670 if (bf->l_len <= 0) {
680 if (bf->l_start < 0 ||
681 bf->l_start > inode->i_sb->s_maxbytes ||
682 bf->l_start + bf->l_len < 0 ||
683 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
689 case XFS_IOC_ZERO_RANGE:
690 flags |= XFS_PREALLOC_SET;
691 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
694 case XFS_IOC_RESVSP64:
695 flags |= XFS_PREALLOC_SET;
696 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
699 case XFS_IOC_UNRESVSP:
700 case XFS_IOC_UNRESVSP64:
701 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
703 case XFS_IOC_ALLOCSP:
704 case XFS_IOC_ALLOCSP64:
706 case XFS_IOC_FREESP64:
707 flags |= XFS_PREALLOC_CLEAR;
708 if (bf->l_start > XFS_ISIZE(ip)) {
709 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
710 bf->l_start - XFS_ISIZE(ip), 0);
715 iattr.ia_valid = ATTR_SIZE;
716 iattr.ia_size = bf->l_start;
718 error = xfs_setattr_size(ip, &iattr);
728 error = xfs_update_prealloc_flags(ip, flags);
731 xfs_iunlock(ip, iolock);
732 mnt_drop_write_file(filp);
742 xfs_fsop_bulkreq_t bulkreq;
743 int count; /* # of records returned */
744 xfs_ino_t inlast; /* last inode number */
748 /* done = 1 if there are more stats to get and if bulkstat */
749 /* should be called again (unused here, but used in dmapi) */
751 if (!capable(CAP_SYS_ADMIN))
754 if (XFS_FORCED_SHUTDOWN(mp))
757 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
760 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
763 if ((count = bulkreq.icount) <= 0)
766 if (bulkreq.ubuffer == NULL)
769 if (cmd == XFS_IOC_FSINUMBERS)
770 error = xfs_inumbers(mp, &inlast, &count,
771 bulkreq.ubuffer, xfs_inumbers_fmt);
772 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
773 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
774 sizeof(xfs_bstat_t), NULL, &done);
775 else /* XFS_IOC_FSBULKSTAT */
776 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
777 sizeof(xfs_bstat_t), bulkreq.ubuffer,
783 if (bulkreq.ocount != NULL) {
784 if (copy_to_user(bulkreq.lastip, &inlast,
788 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
796 xfs_ioc_fsgeometry_v1(
800 xfs_fsop_geom_t fsgeo;
803 error = xfs_fs_geometry(mp, &fsgeo, 3);
808 * Caller should have passed an argument of type
809 * xfs_fsop_geom_v1_t. This is a proper subset of the
810 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
812 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
822 xfs_fsop_geom_t fsgeo;
825 error = xfs_fs_geometry(mp, &fsgeo, 4);
829 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
835 * Linux extended inode flags interface.
839 xfs_merge_ioc_xflags(
843 unsigned int xflags = start;
845 if (flags & FS_IMMUTABLE_FL)
846 xflags |= FS_XFLAG_IMMUTABLE;
848 xflags &= ~FS_XFLAG_IMMUTABLE;
849 if (flags & FS_APPEND_FL)
850 xflags |= FS_XFLAG_APPEND;
852 xflags &= ~FS_XFLAG_APPEND;
853 if (flags & FS_SYNC_FL)
854 xflags |= FS_XFLAG_SYNC;
856 xflags &= ~FS_XFLAG_SYNC;
857 if (flags & FS_NOATIME_FL)
858 xflags |= FS_XFLAG_NOATIME;
860 xflags &= ~FS_XFLAG_NOATIME;
861 if (flags & FS_NODUMP_FL)
862 xflags |= FS_XFLAG_NODUMP;
864 xflags &= ~FS_XFLAG_NODUMP;
873 unsigned int flags = 0;
875 if (di_flags & XFS_DIFLAG_IMMUTABLE)
876 flags |= FS_IMMUTABLE_FL;
877 if (di_flags & XFS_DIFLAG_APPEND)
878 flags |= FS_APPEND_FL;
879 if (di_flags & XFS_DIFLAG_SYNC)
881 if (di_flags & XFS_DIFLAG_NOATIME)
882 flags |= FS_NOATIME_FL;
883 if (di_flags & XFS_DIFLAG_NODUMP)
884 flags |= FS_NODUMP_FL;
896 memset(&fa, 0, sizeof(struct fsxattr));
898 xfs_ilock(ip, XFS_ILOCK_SHARED);
899 fa.fsx_xflags = xfs_ip2xflags(ip);
900 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
901 fa.fsx_projid = xfs_get_projid(ip);
905 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
906 fa.fsx_nextents = ip->i_afp->if_bytes /
907 sizeof(xfs_bmbt_rec_t);
909 fa.fsx_nextents = ip->i_d.di_anextents;
913 if (ip->i_df.if_flags & XFS_IFEXTENTS)
914 fa.fsx_nextents = ip->i_df.if_bytes /
915 sizeof(xfs_bmbt_rec_t);
917 fa.fsx_nextents = ip->i_d.di_nextents;
919 xfs_iunlock(ip, XFS_ILOCK_SHARED);
921 if (copy_to_user(arg, &fa, sizeof(fa)))
928 struct xfs_inode *ip,
931 unsigned int di_flags;
934 /* can't set PREALLOC this way, just preserve it */
935 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
936 if (xflags & FS_XFLAG_IMMUTABLE)
937 di_flags |= XFS_DIFLAG_IMMUTABLE;
938 if (xflags & FS_XFLAG_APPEND)
939 di_flags |= XFS_DIFLAG_APPEND;
940 if (xflags & FS_XFLAG_SYNC)
941 di_flags |= XFS_DIFLAG_SYNC;
942 if (xflags & FS_XFLAG_NOATIME)
943 di_flags |= XFS_DIFLAG_NOATIME;
944 if (xflags & FS_XFLAG_NODUMP)
945 di_flags |= XFS_DIFLAG_NODUMP;
946 if (xflags & FS_XFLAG_NODEFRAG)
947 di_flags |= XFS_DIFLAG_NODEFRAG;
948 if (xflags & FS_XFLAG_FILESTREAM)
949 di_flags |= XFS_DIFLAG_FILESTREAM;
950 if (S_ISDIR(VFS_I(ip)->i_mode)) {
951 if (xflags & FS_XFLAG_RTINHERIT)
952 di_flags |= XFS_DIFLAG_RTINHERIT;
953 if (xflags & FS_XFLAG_NOSYMLINKS)
954 di_flags |= XFS_DIFLAG_NOSYMLINKS;
955 if (xflags & FS_XFLAG_EXTSZINHERIT)
956 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
957 if (xflags & FS_XFLAG_PROJINHERIT)
958 di_flags |= XFS_DIFLAG_PROJINHERIT;
959 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
960 if (xflags & FS_XFLAG_REALTIME)
961 di_flags |= XFS_DIFLAG_REALTIME;
962 if (xflags & FS_XFLAG_EXTSIZE)
963 di_flags |= XFS_DIFLAG_EXTSIZE;
965 ip->i_d.di_flags = di_flags;
967 /* diflags2 only valid for v3 inodes. */
968 if (ip->i_d.di_version < 3)
972 if (xflags & FS_XFLAG_DAX)
973 di_flags2 |= XFS_DIFLAG2_DAX;
975 ip->i_d.di_flags2 = di_flags2;
980 xfs_diflags_to_linux(
981 struct xfs_inode *ip)
983 struct inode *inode = VFS_I(ip);
984 unsigned int xflags = xfs_ip2xflags(ip);
986 if (xflags & FS_XFLAG_IMMUTABLE)
987 inode->i_flags |= S_IMMUTABLE;
989 inode->i_flags &= ~S_IMMUTABLE;
990 if (xflags & FS_XFLAG_APPEND)
991 inode->i_flags |= S_APPEND;
993 inode->i_flags &= ~S_APPEND;
994 if (xflags & FS_XFLAG_SYNC)
995 inode->i_flags |= S_SYNC;
997 inode->i_flags &= ~S_SYNC;
998 if (xflags & FS_XFLAG_NOATIME)
999 inode->i_flags |= S_NOATIME;
1001 inode->i_flags &= ~S_NOATIME;
1002 if (xflags & FS_XFLAG_DAX)
1003 inode->i_flags |= S_DAX;
1005 inode->i_flags &= ~S_DAX;
1010 xfs_ioctl_setattr_xflags(
1011 struct xfs_trans *tp,
1012 struct xfs_inode *ip,
1015 struct xfs_mount *mp = ip->i_mount;
1017 /* Can't change realtime flag if any extents are allocated. */
1018 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1019 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1022 /* If realtime flag is set then must have realtime device */
1023 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1024 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1025 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1030 * Can't modify an immutable/append-only file unless
1031 * we have appropriate permission.
1033 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1034 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
1035 !capable(CAP_LINUX_IMMUTABLE))
1038 xfs_set_diflags(ip, fa->fsx_xflags);
1039 xfs_diflags_to_linux(ip);
1040 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1041 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1042 XFS_STATS_INC(mp, xs_ig_attrchg);
1047 * If we are changing DAX flags, we have to ensure the file is clean and any
1048 * cached objects in the address space are invalidated and removed. This
1049 * requires us to lock out other IO and page faults similar to a truncate
1050 * operation. The locks need to be held until the transaction has been committed
1051 * so that the cache invalidation is atomic with respect to the DAX flag
1055 xfs_ioctl_setattr_dax_invalidate(
1056 struct xfs_inode *ip,
1060 struct inode *inode = VFS_I(ip);
1066 * It is only valid to set the DAX flag on regular files and
1067 * directories on filesystems where the block size is equal to the page
1068 * size. On directories it serves as an inherit hint.
1070 if (fa->fsx_xflags & FS_XFLAG_DAX) {
1071 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
1073 if (ip->i_mount->m_sb.sb_blocksize != PAGE_SIZE)
1077 /* If the DAX state is not changing, we have nothing to do here. */
1078 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1080 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1083 /* lock, flush and invalidate mapping in preparation for flag change */
1084 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1085 error = filemap_write_and_wait(inode->i_mapping);
1088 error = invalidate_inode_pages2(inode->i_mapping);
1092 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1096 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1102 * Set up the transaction structure for the setattr operation, checking that we
1103 * have permission to do so. On success, return a clean transaction and the
1104 * inode locked exclusively ready for further operation specific checks. On
1105 * failure, return an error without modifying or locking the inode.
1107 * The inode might already be IO locked on call. If this is the case, it is
1108 * indicated in @join_flags and we take full responsibility for ensuring they
1109 * are unlocked from now on. Hence if we have an error here, we still have to
1110 * unlock them. Otherwise, once they are joined to the transaction, they will
1111 * be unlocked on commit/cancel.
1113 static struct xfs_trans *
1114 xfs_ioctl_setattr_get_trans(
1115 struct xfs_inode *ip,
1118 struct xfs_mount *mp = ip->i_mount;
1119 struct xfs_trans *tp;
1122 if (mp->m_flags & XFS_MOUNT_RDONLY)
1125 if (XFS_FORCED_SHUTDOWN(mp))
1128 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1130 return ERR_PTR(error);
1132 xfs_ilock(ip, XFS_ILOCK_EXCL);
1133 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1137 * CAP_FOWNER overrides the following restrictions:
1139 * The user ID of the calling process must be equal to the file owner
1140 * ID, except in cases where the CAP_FSETID capability is applicable.
1142 if (!inode_owner_or_capable(VFS_I(ip))) {
1147 if (mp->m_flags & XFS_MOUNT_WSYNC)
1148 xfs_trans_set_sync(tp);
1153 xfs_trans_cancel(tp);
1156 xfs_iunlock(ip, join_flags);
1157 return ERR_PTR(error);
1161 * extent size hint validation is somewhat cumbersome. Rules are:
1163 * 1. extent size hint is only valid for directories and regular files
1164 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1165 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1166 * 4. can only be changed on regular files if no extents are allocated
1167 * 5. can be changed on directories at any time
1168 * 6. extsize hint of 0 turns off hints, clears inode flags.
1169 * 7. Extent size must be a multiple of the appropriate block size.
1170 * 8. for non-realtime files, the extent size hint must be limited
1171 * to half the AG size to avoid alignment extending the extent beyond the
1175 xfs_ioctl_setattr_check_extsize(
1176 struct xfs_inode *ip,
1179 struct xfs_mount *mp = ip->i_mount;
1181 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
1184 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
1185 !S_ISDIR(VFS_I(ip)->i_mode))
1188 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1189 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1192 if (fa->fsx_extsize != 0) {
1194 xfs_fsblock_t extsize_fsb;
1196 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1197 if (extsize_fsb > MAXEXTLEN)
1200 if (XFS_IS_REALTIME_INODE(ip) ||
1201 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1202 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1204 size = mp->m_sb.sb_blocksize;
1205 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1209 if (fa->fsx_extsize % size)
1212 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
1218 xfs_ioctl_setattr_check_projid(
1219 struct xfs_inode *ip,
1222 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1223 if (fa->fsx_projid > (__uint16_t)-1 &&
1224 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1228 * Project Quota ID state is only allowed to change from within the init
1229 * namespace. Enforce that restriction only if we are trying to change
1230 * the quota ID state. Everything else is allowed in user namespaces.
1232 if (current_user_ns() == &init_user_ns)
1235 if (xfs_get_projid(ip) != fa->fsx_projid)
1237 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
1238 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1249 struct xfs_mount *mp = ip->i_mount;
1250 struct xfs_trans *tp;
1251 struct xfs_dquot *udqp = NULL;
1252 struct xfs_dquot *pdqp = NULL;
1253 struct xfs_dquot *olddquot = NULL;
1257 trace_xfs_ioctl_setattr(ip);
1259 code = xfs_ioctl_setattr_check_projid(ip, fa);
1264 * If disk quotas is on, we make sure that the dquots do exist on disk,
1265 * before we start any other transactions. Trying to do this later
1266 * is messy. We don't care to take a readlock to look at the ids
1267 * in inode here, because we can't hold it across the trans_reserve.
1268 * If the IDs do change before we take the ilock, we're covered
1269 * because the i_*dquot fields will get updated anyway.
1271 if (XFS_IS_QUOTA_ON(mp)) {
1272 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1273 ip->i_d.di_gid, fa->fsx_projid,
1274 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1280 * Changing DAX config may require inode locking for mapping
1281 * invalidation. These need to be held all the way to transaction commit
1282 * or cancel time, so need to be passed through to
1283 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1286 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1288 goto error_free_dquots;
1290 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1293 goto error_free_dquots;
1297 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1298 xfs_get_projid(ip) != fa->fsx_projid) {
1299 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1300 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1301 if (code) /* out of quota */
1302 goto error_trans_cancel;
1305 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1307 goto error_trans_cancel;
1309 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1311 goto error_trans_cancel;
1314 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1315 * overrides the following restrictions:
1317 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1318 * successful return from chown()
1321 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1322 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1323 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1325 /* Change the ownerships and register project quota modifications */
1326 if (xfs_get_projid(ip) != fa->fsx_projid) {
1327 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1328 olddquot = xfs_qm_vop_chown(tp, ip,
1329 &ip->i_pdquot, pdqp);
1331 ASSERT(ip->i_d.di_version > 1);
1332 xfs_set_projid(ip, fa->fsx_projid);
1336 * Only set the extent size hint if we've already determined that the
1337 * extent size hint should be set on the inode. If no extent size flags
1338 * are set on the inode then unconditionally clear the extent size hint.
1340 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1341 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1343 ip->i_d.di_extsize = 0;
1345 code = xfs_trans_commit(tp);
1348 * Release any dquot(s) the inode had kept before chown.
1350 xfs_qm_dqrele(olddquot);
1351 xfs_qm_dqrele(udqp);
1352 xfs_qm_dqrele(pdqp);
1357 xfs_trans_cancel(tp);
1359 xfs_qm_dqrele(udqp);
1360 xfs_qm_dqrele(pdqp);
1373 if (copy_from_user(&fa, arg, sizeof(fa)))
1376 error = mnt_want_write_file(filp);
1379 error = xfs_ioctl_setattr(ip, &fa);
1380 mnt_drop_write_file(filp);
1391 flags = xfs_di2lxflags(ip->i_d.di_flags);
1392 if (copy_to_user(arg, &flags, sizeof(flags)))
1399 struct xfs_inode *ip,
1403 struct xfs_trans *tp;
1409 if (copy_from_user(&flags, arg, sizeof(flags)))
1412 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1413 FS_NOATIME_FL | FS_NODUMP_FL | \
1417 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1419 error = mnt_want_write_file(filp);
1424 * Changing DAX config may require inode locking for mapping
1425 * invalidation. These need to be held all the way to transaction commit
1426 * or cancel time, so need to be passed through to
1427 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1430 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1432 goto out_drop_write;
1434 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1436 error = PTR_ERR(tp);
1437 goto out_drop_write;
1440 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1442 xfs_trans_cancel(tp);
1443 goto out_drop_write;
1446 error = xfs_trans_commit(tp);
1448 mnt_drop_write_file(filp);
1453 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1455 struct getbmap __user *base = (struct getbmap __user *)*ap;
1457 /* copy only getbmap portion (not getbmapx) */
1458 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1461 *ap += sizeof(struct getbmap);
1467 struct xfs_inode *ip,
1472 struct getbmapx bmx;
1475 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1478 if (bmx.bmv_count < 2)
1481 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1482 if (ioflags & XFS_IO_INVIS)
1483 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1485 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1486 (__force struct getbmap *)arg+1);
1490 /* copy back header - only size of getbmap */
1491 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1497 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1499 struct getbmapx __user *base = (struct getbmapx __user *)*ap;
1501 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1504 *ap += sizeof(struct getbmapx);
1510 struct xfs_inode *ip,
1513 struct getbmapx bmx;
1516 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1519 if (bmx.bmv_count < 2)
1522 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1525 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1526 (__force struct getbmapx *)arg+1);
1530 /* copy back header */
1531 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1541 xfs_inode_t *ip, *tip;
1545 /* Pull information for the target fd */
1546 f = fdget((int)sxp->sx_fdtarget);
1552 if (!(f.file->f_mode & FMODE_WRITE) ||
1553 !(f.file->f_mode & FMODE_READ) ||
1554 (f.file->f_flags & O_APPEND)) {
1559 tmp = fdget((int)sxp->sx_fdtmp);
1565 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1566 !(tmp.file->f_mode & FMODE_READ) ||
1567 (tmp.file->f_flags & O_APPEND)) {
1569 goto out_put_tmp_file;
1572 if (IS_SWAPFILE(file_inode(f.file)) ||
1573 IS_SWAPFILE(file_inode(tmp.file))) {
1575 goto out_put_tmp_file;
1578 ip = XFS_I(file_inode(f.file));
1579 tip = XFS_I(file_inode(tmp.file));
1581 if (ip->i_mount != tip->i_mount) {
1583 goto out_put_tmp_file;
1586 if (ip->i_ino == tip->i_ino) {
1588 goto out_put_tmp_file;
1591 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1593 goto out_put_tmp_file;
1596 error = xfs_swap_extents(ip, tip, sxp);
1607 * Note: some of the ioctl's return positive numbers as a
1608 * byte count indicating success, such as readlink_by_handle.
1609 * So we don't "sign flip" like most other routines. This means
1610 * true errors need to be returned as a negative value.
1618 struct inode *inode = file_inode(filp);
1619 struct xfs_inode *ip = XFS_I(inode);
1620 struct xfs_mount *mp = ip->i_mount;
1621 void __user *arg = (void __user *)p;
1625 if (filp->f_mode & FMODE_NOCMTIME)
1626 ioflags |= XFS_IO_INVIS;
1628 trace_xfs_file_ioctl(ip);
1632 return xfs_ioc_trim(mp, arg);
1633 case XFS_IOC_ALLOCSP:
1634 case XFS_IOC_FREESP:
1635 case XFS_IOC_RESVSP:
1636 case XFS_IOC_UNRESVSP:
1637 case XFS_IOC_ALLOCSP64:
1638 case XFS_IOC_FREESP64:
1639 case XFS_IOC_RESVSP64:
1640 case XFS_IOC_UNRESVSP64:
1641 case XFS_IOC_ZERO_RANGE: {
1644 if (copy_from_user(&bf, arg, sizeof(bf)))
1646 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1648 case XFS_IOC_DIOINFO: {
1650 xfs_buftarg_t *target =
1651 XFS_IS_REALTIME_INODE(ip) ?
1652 mp->m_rtdev_targp : mp->m_ddev_targp;
1654 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1655 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1657 if (copy_to_user(arg, &da, sizeof(da)))
1662 case XFS_IOC_FSBULKSTAT_SINGLE:
1663 case XFS_IOC_FSBULKSTAT:
1664 case XFS_IOC_FSINUMBERS:
1665 return xfs_ioc_bulkstat(mp, cmd, arg);
1667 case XFS_IOC_FSGEOMETRY_V1:
1668 return xfs_ioc_fsgeometry_v1(mp, arg);
1670 case XFS_IOC_FSGEOMETRY:
1671 return xfs_ioc_fsgeometry(mp, arg);
1673 case XFS_IOC_GETVERSION:
1674 return put_user(inode->i_generation, (int __user *)arg);
1676 case XFS_IOC_FSGETXATTR:
1677 return xfs_ioc_fsgetxattr(ip, 0, arg);
1678 case XFS_IOC_FSGETXATTRA:
1679 return xfs_ioc_fsgetxattr(ip, 1, arg);
1680 case XFS_IOC_FSSETXATTR:
1681 return xfs_ioc_fssetxattr(ip, filp, arg);
1682 case XFS_IOC_GETXFLAGS:
1683 return xfs_ioc_getxflags(ip, arg);
1684 case XFS_IOC_SETXFLAGS:
1685 return xfs_ioc_setxflags(ip, filp, arg);
1687 case XFS_IOC_FSSETDM: {
1688 struct fsdmidata dmi;
1690 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1693 error = mnt_want_write_file(filp);
1697 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1699 mnt_drop_write_file(filp);
1703 case XFS_IOC_GETBMAP:
1704 case XFS_IOC_GETBMAPA:
1705 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1707 case XFS_IOC_GETBMAPX:
1708 return xfs_ioc_getbmapx(ip, arg);
1710 case XFS_IOC_FD_TO_HANDLE:
1711 case XFS_IOC_PATH_TO_HANDLE:
1712 case XFS_IOC_PATH_TO_FSHANDLE: {
1713 xfs_fsop_handlereq_t hreq;
1715 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1717 return xfs_find_handle(cmd, &hreq);
1719 case XFS_IOC_OPEN_BY_HANDLE: {
1720 xfs_fsop_handlereq_t hreq;
1722 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1724 return xfs_open_by_handle(filp, &hreq);
1726 case XFS_IOC_FSSETDM_BY_HANDLE:
1727 return xfs_fssetdm_by_handle(filp, arg);
1729 case XFS_IOC_READLINK_BY_HANDLE: {
1730 xfs_fsop_handlereq_t hreq;
1732 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1734 return xfs_readlink_by_handle(filp, &hreq);
1736 case XFS_IOC_ATTRLIST_BY_HANDLE:
1737 return xfs_attrlist_by_handle(filp, arg);
1739 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1740 return xfs_attrmulti_by_handle(filp, arg);
1742 case XFS_IOC_SWAPEXT: {
1743 struct xfs_swapext sxp;
1745 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1747 error = mnt_want_write_file(filp);
1750 error = xfs_ioc_swapext(&sxp);
1751 mnt_drop_write_file(filp);
1755 case XFS_IOC_FSCOUNTS: {
1756 xfs_fsop_counts_t out;
1758 error = xfs_fs_counts(mp, &out);
1762 if (copy_to_user(arg, &out, sizeof(out)))
1767 case XFS_IOC_SET_RESBLKS: {
1768 xfs_fsop_resblks_t inout;
1771 if (!capable(CAP_SYS_ADMIN))
1774 if (mp->m_flags & XFS_MOUNT_RDONLY)
1777 if (copy_from_user(&inout, arg, sizeof(inout)))
1780 error = mnt_want_write_file(filp);
1784 /* input parameter is passed in resblks field of structure */
1786 error = xfs_reserve_blocks(mp, &in, &inout);
1787 mnt_drop_write_file(filp);
1791 if (copy_to_user(arg, &inout, sizeof(inout)))
1796 case XFS_IOC_GET_RESBLKS: {
1797 xfs_fsop_resblks_t out;
1799 if (!capable(CAP_SYS_ADMIN))
1802 error = xfs_reserve_blocks(mp, NULL, &out);
1806 if (copy_to_user(arg, &out, sizeof(out)))
1812 case XFS_IOC_FSGROWFSDATA: {
1813 xfs_growfs_data_t in;
1815 if (copy_from_user(&in, arg, sizeof(in)))
1818 error = mnt_want_write_file(filp);
1821 error = xfs_growfs_data(mp, &in);
1822 mnt_drop_write_file(filp);
1826 case XFS_IOC_FSGROWFSLOG: {
1827 xfs_growfs_log_t in;
1829 if (copy_from_user(&in, arg, sizeof(in)))
1832 error = mnt_want_write_file(filp);
1835 error = xfs_growfs_log(mp, &in);
1836 mnt_drop_write_file(filp);
1840 case XFS_IOC_FSGROWFSRT: {
1843 if (copy_from_user(&in, arg, sizeof(in)))
1846 error = mnt_want_write_file(filp);
1849 error = xfs_growfs_rt(mp, &in);
1850 mnt_drop_write_file(filp);
1854 case XFS_IOC_GOINGDOWN: {
1857 if (!capable(CAP_SYS_ADMIN))
1860 if (get_user(in, (__uint32_t __user *)arg))
1863 return xfs_fs_goingdown(mp, in);
1866 case XFS_IOC_ERROR_INJECTION: {
1867 xfs_error_injection_t in;
1869 if (!capable(CAP_SYS_ADMIN))
1872 if (copy_from_user(&in, arg, sizeof(in)))
1875 return xfs_errortag_add(in.errtag, mp);
1878 case XFS_IOC_ERROR_CLEARALL:
1879 if (!capable(CAP_SYS_ADMIN))
1882 return xfs_errortag_clearall(mp, 1);
1884 case XFS_IOC_FREE_EOFBLOCKS: {
1885 struct xfs_fs_eofblocks eofb;
1886 struct xfs_eofblocks keofb;
1888 if (!capable(CAP_SYS_ADMIN))
1891 if (mp->m_flags & XFS_MOUNT_RDONLY)
1894 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1897 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1901 return xfs_icache_free_eofblocks(mp, &keofb);