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 struct xfs_fsop_attrlist_handlereq __user *p = arg;
391 xfs_fsop_attrlist_handlereq_t al_hreq;
392 struct dentry *dentry;
395 if (!capable(CAP_SYS_ADMIN))
397 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
399 if (al_hreq.buflen < sizeof(struct attrlist) ||
400 al_hreq.buflen > XFS_XATTR_LIST_MAX)
404 * Reject flags, only allow namespaces.
406 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
409 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
411 return PTR_ERR(dentry);
413 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
417 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
418 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
419 al_hreq.flags, cursor);
423 if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
428 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
439 xfs_attrmulti_attr_get(
442 unsigned char __user *ubuf,
449 if (*len > XFS_XATTR_SIZE_MAX)
451 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
455 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
459 if (copy_to_user(ubuf, kbuf, *len))
468 xfs_attrmulti_attr_set(
471 const unsigned char __user *ubuf,
478 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
480 if (len > XFS_XATTR_SIZE_MAX)
483 kbuf = memdup_user(ubuf, len);
485 return PTR_ERR(kbuf);
487 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
489 xfs_forget_acl(inode, name, flags);
495 xfs_attrmulti_attr_remove(
502 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
504 error = xfs_attr_remove(XFS_I(inode), name, flags);
506 xfs_forget_acl(inode, name, flags);
511 xfs_attrmulti_by_handle(
512 struct file *parfilp,
516 xfs_attr_multiop_t *ops;
517 xfs_fsop_attrmulti_handlereq_t am_hreq;
518 struct dentry *dentry;
519 unsigned int i, size;
520 unsigned char *attr_name;
522 if (!capable(CAP_SYS_ADMIN))
524 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
528 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
531 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
533 return PTR_ERR(dentry);
536 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
537 if (!size || size > 16 * PAGE_SIZE)
540 ops = memdup_user(am_hreq.ops, size);
542 error = PTR_ERR(ops);
547 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
552 for (i = 0; i < am_hreq.opcount; i++) {
553 ops[i].am_error = strncpy_from_user((char *)attr_name,
554 ops[i].am_attrname, MAXNAMELEN);
555 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
557 if (ops[i].am_error < 0)
560 switch (ops[i].am_opcode) {
562 ops[i].am_error = xfs_attrmulti_attr_get(
563 d_inode(dentry), attr_name,
564 ops[i].am_attrvalue, &ops[i].am_length,
568 ops[i].am_error = mnt_want_write_file(parfilp);
571 ops[i].am_error = xfs_attrmulti_attr_set(
572 d_inode(dentry), attr_name,
573 ops[i].am_attrvalue, ops[i].am_length,
575 mnt_drop_write_file(parfilp);
578 ops[i].am_error = mnt_want_write_file(parfilp);
581 ops[i].am_error = xfs_attrmulti_attr_remove(
582 d_inode(dentry), attr_name,
584 mnt_drop_write_file(parfilp);
587 ops[i].am_error = -EINVAL;
591 if (copy_to_user(am_hreq.ops, ops, size))
608 struct inode *inode = file_inode(filp);
609 struct xfs_inode *ip = XFS_I(inode);
611 enum xfs_prealloc_flags flags = 0;
612 uint iolock = XFS_IOLOCK_EXCL;
616 * Only allow the sys admin to reserve space unless
617 * unwritten extents are enabled.
619 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
620 !capable(CAP_SYS_ADMIN))
623 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
626 if (!(filp->f_mode & FMODE_WRITE))
629 if (!S_ISREG(inode->i_mode))
632 if (filp->f_flags & O_DSYNC)
633 flags |= XFS_PREALLOC_SYNC;
634 if (filp->f_mode & FMODE_NOCMTIME)
635 flags |= XFS_PREALLOC_INVISIBLE;
637 error = mnt_want_write_file(filp);
641 xfs_ilock(ip, iolock);
642 error = xfs_break_layouts(inode, &iolock, false);
646 xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
647 iolock |= XFS_MMAPLOCK_EXCL;
649 switch (bf->l_whence) {
653 bf->l_start += filp->f_pos;
656 bf->l_start += XFS_ISIZE(ip);
664 * length of <= 0 for resv/unresv/zero is invalid. length for
665 * alloc/free is ignored completely and we have no idea what userspace
666 * might have set it to, so set it to zero to allow range
670 case XFS_IOC_ZERO_RANGE:
672 case XFS_IOC_RESVSP64:
673 case XFS_IOC_UNRESVSP:
674 case XFS_IOC_UNRESVSP64:
675 if (bf->l_len <= 0) {
685 if (bf->l_start < 0 ||
686 bf->l_start > inode->i_sb->s_maxbytes ||
687 bf->l_start + bf->l_len < 0 ||
688 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
694 case XFS_IOC_ZERO_RANGE:
695 flags |= XFS_PREALLOC_SET;
696 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
699 case XFS_IOC_RESVSP64:
700 flags |= XFS_PREALLOC_SET;
701 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
704 case XFS_IOC_UNRESVSP:
705 case XFS_IOC_UNRESVSP64:
706 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
708 case XFS_IOC_ALLOCSP:
709 case XFS_IOC_ALLOCSP64:
711 case XFS_IOC_FREESP64:
712 flags |= XFS_PREALLOC_CLEAR;
713 if (bf->l_start > XFS_ISIZE(ip)) {
714 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
715 bf->l_start - XFS_ISIZE(ip),
721 iattr.ia_valid = ATTR_SIZE;
722 iattr.ia_size = bf->l_start;
724 error = xfs_vn_setattr_size(file_dentry(filp), &iattr);
734 error = xfs_update_prealloc_flags(ip, flags);
737 xfs_iunlock(ip, iolock);
738 mnt_drop_write_file(filp);
748 xfs_fsop_bulkreq_t bulkreq;
749 int count; /* # of records returned */
750 xfs_ino_t inlast; /* last inode number */
754 /* done = 1 if there are more stats to get and if bulkstat */
755 /* should be called again (unused here, but used in dmapi) */
757 if (!capable(CAP_SYS_ADMIN))
760 if (XFS_FORCED_SHUTDOWN(mp))
763 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
766 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
769 if ((count = bulkreq.icount) <= 0)
772 if (bulkreq.ubuffer == NULL)
775 if (cmd == XFS_IOC_FSINUMBERS)
776 error = xfs_inumbers(mp, &inlast, &count,
777 bulkreq.ubuffer, xfs_inumbers_fmt);
778 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
779 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
780 sizeof(xfs_bstat_t), NULL, &done);
781 else /* XFS_IOC_FSBULKSTAT */
782 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
783 sizeof(xfs_bstat_t), bulkreq.ubuffer,
789 if (bulkreq.ocount != NULL) {
790 if (copy_to_user(bulkreq.lastip, &inlast,
794 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
802 xfs_ioc_fsgeometry_v1(
806 xfs_fsop_geom_t fsgeo;
809 error = xfs_fs_geometry(mp, &fsgeo, 3);
814 * Caller should have passed an argument of type
815 * xfs_fsop_geom_v1_t. This is a proper subset of the
816 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
818 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
828 xfs_fsop_geom_t fsgeo;
831 error = xfs_fs_geometry(mp, &fsgeo, 4);
835 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
841 * Linux extended inode flags interface.
845 xfs_merge_ioc_xflags(
849 unsigned int xflags = start;
851 if (flags & FS_IMMUTABLE_FL)
852 xflags |= FS_XFLAG_IMMUTABLE;
854 xflags &= ~FS_XFLAG_IMMUTABLE;
855 if (flags & FS_APPEND_FL)
856 xflags |= FS_XFLAG_APPEND;
858 xflags &= ~FS_XFLAG_APPEND;
859 if (flags & FS_SYNC_FL)
860 xflags |= FS_XFLAG_SYNC;
862 xflags &= ~FS_XFLAG_SYNC;
863 if (flags & FS_NOATIME_FL)
864 xflags |= FS_XFLAG_NOATIME;
866 xflags &= ~FS_XFLAG_NOATIME;
867 if (flags & FS_NODUMP_FL)
868 xflags |= FS_XFLAG_NODUMP;
870 xflags &= ~FS_XFLAG_NODUMP;
879 unsigned int flags = 0;
881 if (di_flags & XFS_DIFLAG_IMMUTABLE)
882 flags |= FS_IMMUTABLE_FL;
883 if (di_flags & XFS_DIFLAG_APPEND)
884 flags |= FS_APPEND_FL;
885 if (di_flags & XFS_DIFLAG_SYNC)
887 if (di_flags & XFS_DIFLAG_NOATIME)
888 flags |= FS_NOATIME_FL;
889 if (di_flags & XFS_DIFLAG_NODUMP)
890 flags |= FS_NODUMP_FL;
902 memset(&fa, 0, sizeof(struct fsxattr));
904 xfs_ilock(ip, XFS_ILOCK_SHARED);
905 fa.fsx_xflags = xfs_ip2xflags(ip);
906 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
907 fa.fsx_cowextsize = ip->i_d.di_cowextsize <<
908 ip->i_mount->m_sb.sb_blocklog;
909 fa.fsx_projid = xfs_get_projid(ip);
913 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
914 fa.fsx_nextents = xfs_iext_count(ip->i_afp);
916 fa.fsx_nextents = ip->i_d.di_anextents;
920 if (ip->i_df.if_flags & XFS_IFEXTENTS)
921 fa.fsx_nextents = xfs_iext_count(&ip->i_df);
923 fa.fsx_nextents = ip->i_d.di_nextents;
925 xfs_iunlock(ip, XFS_ILOCK_SHARED);
927 if (copy_to_user(arg, &fa, sizeof(fa)))
934 struct xfs_inode *ip,
937 /* can't set PREALLOC this way, just preserve it */
939 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
941 if (xflags & FS_XFLAG_IMMUTABLE)
942 di_flags |= XFS_DIFLAG_IMMUTABLE;
943 if (xflags & FS_XFLAG_APPEND)
944 di_flags |= XFS_DIFLAG_APPEND;
945 if (xflags & FS_XFLAG_SYNC)
946 di_flags |= XFS_DIFLAG_SYNC;
947 if (xflags & FS_XFLAG_NOATIME)
948 di_flags |= XFS_DIFLAG_NOATIME;
949 if (xflags & FS_XFLAG_NODUMP)
950 di_flags |= XFS_DIFLAG_NODUMP;
951 if (xflags & FS_XFLAG_NODEFRAG)
952 di_flags |= XFS_DIFLAG_NODEFRAG;
953 if (xflags & FS_XFLAG_FILESTREAM)
954 di_flags |= XFS_DIFLAG_FILESTREAM;
955 if (S_ISDIR(VFS_I(ip)->i_mode)) {
956 if (xflags & FS_XFLAG_RTINHERIT)
957 di_flags |= XFS_DIFLAG_RTINHERIT;
958 if (xflags & FS_XFLAG_NOSYMLINKS)
959 di_flags |= XFS_DIFLAG_NOSYMLINKS;
960 if (xflags & FS_XFLAG_EXTSZINHERIT)
961 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
962 if (xflags & FS_XFLAG_PROJINHERIT)
963 di_flags |= XFS_DIFLAG_PROJINHERIT;
964 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
965 if (xflags & FS_XFLAG_REALTIME)
966 di_flags |= XFS_DIFLAG_REALTIME;
967 if (xflags & FS_XFLAG_EXTSIZE)
968 di_flags |= XFS_DIFLAG_EXTSIZE;
976 struct xfs_inode *ip,
980 (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
982 if (xflags & FS_XFLAG_DAX)
983 di_flags2 |= XFS_DIFLAG2_DAX;
984 if (xflags & FS_XFLAG_COWEXTSIZE)
985 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
991 xfs_diflags_to_linux(
992 struct xfs_inode *ip)
994 struct inode *inode = VFS_I(ip);
995 unsigned int xflags = xfs_ip2xflags(ip);
997 if (xflags & FS_XFLAG_IMMUTABLE)
998 inode->i_flags |= S_IMMUTABLE;
1000 inode->i_flags &= ~S_IMMUTABLE;
1001 if (xflags & FS_XFLAG_APPEND)
1002 inode->i_flags |= S_APPEND;
1004 inode->i_flags &= ~S_APPEND;
1005 if (xflags & FS_XFLAG_SYNC)
1006 inode->i_flags |= S_SYNC;
1008 inode->i_flags &= ~S_SYNC;
1009 if (xflags & FS_XFLAG_NOATIME)
1010 inode->i_flags |= S_NOATIME;
1012 inode->i_flags &= ~S_NOATIME;
1013 #if 0 /* disabled until the flag switching races are sorted out */
1014 if (xflags & FS_XFLAG_DAX)
1015 inode->i_flags |= S_DAX;
1017 inode->i_flags &= ~S_DAX;
1022 xfs_ioctl_setattr_xflags(
1023 struct xfs_trans *tp,
1024 struct xfs_inode *ip,
1027 struct xfs_mount *mp = ip->i_mount;
1030 /* Can't change realtime flag if any extents are allocated. */
1031 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1032 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1035 /* If realtime flag is set then must have realtime device */
1036 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1037 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1038 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1042 /* Clear reflink if we are actually able to set the rt flag. */
1043 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1044 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
1046 /* Don't allow us to set DAX mode for a reflinked file for now. */
1047 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
1051 * Can't modify an immutable/append-only file unless
1052 * we have appropriate permission.
1054 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1055 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
1056 !capable(CAP_LINUX_IMMUTABLE))
1059 /* diflags2 only valid for v3 inodes. */
1060 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1061 if (di_flags2 && ip->i_d.di_version < 3)
1064 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags);
1065 ip->i_d.di_flags2 = di_flags2;
1067 xfs_diflags_to_linux(ip);
1068 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1069 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1070 XFS_STATS_INC(mp, xs_ig_attrchg);
1075 * If we are changing DAX flags, we have to ensure the file is clean and any
1076 * cached objects in the address space are invalidated and removed. This
1077 * requires us to lock out other IO and page faults similar to a truncate
1078 * operation. The locks need to be held until the transaction has been committed
1079 * so that the cache invalidation is atomic with respect to the DAX flag
1083 xfs_ioctl_setattr_dax_invalidate(
1084 struct xfs_inode *ip,
1088 struct inode *inode = VFS_I(ip);
1089 struct super_block *sb = inode->i_sb;
1095 * It is only valid to set the DAX flag on regular files and
1096 * directories on filesystems where the block size is equal to the page
1097 * size. On directories it serves as an inherit hint.
1099 if (fa->fsx_xflags & FS_XFLAG_DAX) {
1100 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
1102 if (bdev_dax_supported(sb, sb->s_blocksize) < 0)
1106 /* If the DAX state is not changing, we have nothing to do here. */
1107 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1109 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1112 /* lock, flush and invalidate mapping in preparation for flag change */
1113 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1114 error = filemap_write_and_wait(inode->i_mapping);
1117 error = invalidate_inode_pages2(inode->i_mapping);
1121 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1125 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1131 * Set up the transaction structure for the setattr operation, checking that we
1132 * have permission to do so. On success, return a clean transaction and the
1133 * inode locked exclusively ready for further operation specific checks. On
1134 * failure, return an error without modifying or locking the inode.
1136 * The inode might already be IO locked on call. If this is the case, it is
1137 * indicated in @join_flags and we take full responsibility for ensuring they
1138 * are unlocked from now on. Hence if we have an error here, we still have to
1139 * unlock them. Otherwise, once they are joined to the transaction, they will
1140 * be unlocked on commit/cancel.
1142 static struct xfs_trans *
1143 xfs_ioctl_setattr_get_trans(
1144 struct xfs_inode *ip,
1147 struct xfs_mount *mp = ip->i_mount;
1148 struct xfs_trans *tp;
1151 if (mp->m_flags & XFS_MOUNT_RDONLY)
1154 if (XFS_FORCED_SHUTDOWN(mp))
1157 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1159 return ERR_PTR(error);
1161 xfs_ilock(ip, XFS_ILOCK_EXCL);
1162 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1166 * CAP_FOWNER overrides the following restrictions:
1168 * The user ID of the calling process must be equal to the file owner
1169 * ID, except in cases where the CAP_FSETID capability is applicable.
1171 if (!inode_owner_or_capable(VFS_I(ip))) {
1176 if (mp->m_flags & XFS_MOUNT_WSYNC)
1177 xfs_trans_set_sync(tp);
1182 xfs_trans_cancel(tp);
1185 xfs_iunlock(ip, join_flags);
1186 return ERR_PTR(error);
1190 * extent size hint validation is somewhat cumbersome. Rules are:
1192 * 1. extent size hint is only valid for directories and regular files
1193 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1194 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1195 * 4. can only be changed on regular files if no extents are allocated
1196 * 5. can be changed on directories at any time
1197 * 6. extsize hint of 0 turns off hints, clears inode flags.
1198 * 7. Extent size must be a multiple of the appropriate block size.
1199 * 8. for non-realtime files, the extent size hint must be limited
1200 * to half the AG size to avoid alignment extending the extent beyond the
1204 xfs_ioctl_setattr_check_extsize(
1205 struct xfs_inode *ip,
1208 struct xfs_mount *mp = ip->i_mount;
1210 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
1213 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
1214 !S_ISDIR(VFS_I(ip)->i_mode))
1217 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1218 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1221 if (fa->fsx_extsize != 0) {
1223 xfs_fsblock_t extsize_fsb;
1225 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1226 if (extsize_fsb > MAXEXTLEN)
1229 if (XFS_IS_REALTIME_INODE(ip) ||
1230 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1231 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1233 size = mp->m_sb.sb_blocksize;
1234 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1238 if (fa->fsx_extsize % size)
1241 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
1247 * CoW extent size hint validation rules are:
1249 * 1. CoW extent size hint can only be set if reflink is enabled on the fs.
1250 * The inode does not have to have any shared blocks, but it must be a v3.
1251 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
1252 * for a directory, the hint is propagated to new files.
1253 * 3. Can be changed on files & directories at any time.
1254 * 4. CoW extsize hint of 0 turns off hints, clears inode flags.
1255 * 5. Extent size must be a multiple of the appropriate block size.
1256 * 6. The extent size hint must be limited to half the AG size to avoid
1257 * alignment extending the extent beyond the limits of the AG.
1260 xfs_ioctl_setattr_check_cowextsize(
1261 struct xfs_inode *ip,
1264 struct xfs_mount *mp = ip->i_mount;
1266 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
1269 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) ||
1270 ip->i_d.di_version != 3)
1273 if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode))
1276 if (fa->fsx_cowextsize != 0) {
1278 xfs_fsblock_t cowextsize_fsb;
1280 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1281 if (cowextsize_fsb > MAXEXTLEN)
1284 size = mp->m_sb.sb_blocksize;
1285 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
1288 if (fa->fsx_cowextsize % size)
1291 fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;
1297 xfs_ioctl_setattr_check_projid(
1298 struct xfs_inode *ip,
1301 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1302 if (fa->fsx_projid > (__uint16_t)-1 &&
1303 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1307 * Project Quota ID state is only allowed to change from within the init
1308 * namespace. Enforce that restriction only if we are trying to change
1309 * the quota ID state. Everything else is allowed in user namespaces.
1311 if (current_user_ns() == &init_user_ns)
1314 if (xfs_get_projid(ip) != fa->fsx_projid)
1316 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
1317 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1328 struct xfs_mount *mp = ip->i_mount;
1329 struct xfs_trans *tp;
1330 struct xfs_dquot *udqp = NULL;
1331 struct xfs_dquot *pdqp = NULL;
1332 struct xfs_dquot *olddquot = NULL;
1336 trace_xfs_ioctl_setattr(ip);
1338 code = xfs_ioctl_setattr_check_projid(ip, fa);
1343 * If disk quotas is on, we make sure that the dquots do exist on disk,
1344 * before we start any other transactions. Trying to do this later
1345 * is messy. We don't care to take a readlock to look at the ids
1346 * in inode here, because we can't hold it across the trans_reserve.
1347 * If the IDs do change before we take the ilock, we're covered
1348 * because the i_*dquot fields will get updated anyway.
1350 if (XFS_IS_QUOTA_ON(mp)) {
1351 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1352 ip->i_d.di_gid, fa->fsx_projid,
1353 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1359 * Changing DAX config may require inode locking for mapping
1360 * invalidation. These need to be held all the way to transaction commit
1361 * or cancel time, so need to be passed through to
1362 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1365 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1367 goto error_free_dquots;
1369 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1372 goto error_free_dquots;
1376 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1377 xfs_get_projid(ip) != fa->fsx_projid) {
1378 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1379 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1380 if (code) /* out of quota */
1381 goto error_trans_cancel;
1384 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1386 goto error_trans_cancel;
1388 code = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1390 goto error_trans_cancel;
1392 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1394 goto error_trans_cancel;
1397 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1398 * overrides the following restrictions:
1400 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1401 * successful return from chown()
1404 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1405 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1406 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1408 /* Change the ownerships and register project quota modifications */
1409 if (xfs_get_projid(ip) != fa->fsx_projid) {
1410 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1411 olddquot = xfs_qm_vop_chown(tp, ip,
1412 &ip->i_pdquot, pdqp);
1414 ASSERT(ip->i_d.di_version > 1);
1415 xfs_set_projid(ip, fa->fsx_projid);
1419 * Only set the extent size hint if we've already determined that the
1420 * extent size hint should be set on the inode. If no extent size flags
1421 * are set on the inode then unconditionally clear the extent size hint.
1423 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1424 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1426 ip->i_d.di_extsize = 0;
1427 if (ip->i_d.di_version == 3 &&
1428 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
1429 ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
1430 mp->m_sb.sb_blocklog;
1432 ip->i_d.di_cowextsize = 0;
1434 code = xfs_trans_commit(tp);
1437 * Release any dquot(s) the inode had kept before chown.
1439 xfs_qm_dqrele(olddquot);
1440 xfs_qm_dqrele(udqp);
1441 xfs_qm_dqrele(pdqp);
1446 xfs_trans_cancel(tp);
1448 xfs_qm_dqrele(udqp);
1449 xfs_qm_dqrele(pdqp);
1462 if (copy_from_user(&fa, arg, sizeof(fa)))
1465 error = mnt_want_write_file(filp);
1468 error = xfs_ioctl_setattr(ip, &fa);
1469 mnt_drop_write_file(filp);
1480 flags = xfs_di2lxflags(ip->i_d.di_flags);
1481 if (copy_to_user(arg, &flags, sizeof(flags)))
1488 struct xfs_inode *ip,
1492 struct xfs_trans *tp;
1498 if (copy_from_user(&flags, arg, sizeof(flags)))
1501 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1502 FS_NOATIME_FL | FS_NODUMP_FL | \
1506 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1508 error = mnt_want_write_file(filp);
1513 * Changing DAX config may require inode locking for mapping
1514 * invalidation. These need to be held all the way to transaction commit
1515 * or cancel time, so need to be passed through to
1516 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1519 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1521 goto out_drop_write;
1523 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1525 error = PTR_ERR(tp);
1526 goto out_drop_write;
1529 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1531 xfs_trans_cancel(tp);
1532 goto out_drop_write;
1535 error = xfs_trans_commit(tp);
1537 mnt_drop_write_file(filp);
1542 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1544 struct getbmap __user *base = (struct getbmap __user *)*ap;
1546 /* copy only getbmap portion (not getbmapx) */
1547 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1550 *ap += sizeof(struct getbmap);
1560 struct getbmapx bmx = { 0 };
1563 /* struct getbmap is a strict subset of struct getbmapx. */
1564 if (copy_from_user(&bmx, arg, offsetof(struct getbmapx, bmv_iflags)))
1567 if (bmx.bmv_count < 2)
1570 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1571 if (file->f_mode & FMODE_NOCMTIME)
1572 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1574 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, xfs_getbmap_format,
1575 (__force struct getbmap *)arg+1);
1579 /* copy back header - only size of getbmap */
1580 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1586 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1588 struct getbmapx __user *base = (struct getbmapx __user *)*ap;
1590 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1593 *ap += sizeof(struct getbmapx);
1599 struct xfs_inode *ip,
1602 struct getbmapx bmx;
1605 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1608 if (bmx.bmv_count < 2)
1611 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1614 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1615 (__force struct getbmapx *)arg+1);
1619 /* copy back header */
1620 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1630 xfs_inode_t *ip, *tip;
1634 /* Pull information for the target fd */
1635 f = fdget((int)sxp->sx_fdtarget);
1641 if (!(f.file->f_mode & FMODE_WRITE) ||
1642 !(f.file->f_mode & FMODE_READ) ||
1643 (f.file->f_flags & O_APPEND)) {
1648 tmp = fdget((int)sxp->sx_fdtmp);
1654 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1655 !(tmp.file->f_mode & FMODE_READ) ||
1656 (tmp.file->f_flags & O_APPEND)) {
1658 goto out_put_tmp_file;
1661 if (IS_SWAPFILE(file_inode(f.file)) ||
1662 IS_SWAPFILE(file_inode(tmp.file))) {
1664 goto out_put_tmp_file;
1668 * We need to ensure that the fds passed in point to XFS inodes
1669 * before we cast and access them as XFS structures as we have no
1670 * control over what the user passes us here.
1672 if (f.file->f_op != &xfs_file_operations ||
1673 tmp.file->f_op != &xfs_file_operations) {
1675 goto out_put_tmp_file;
1678 ip = XFS_I(file_inode(f.file));
1679 tip = XFS_I(file_inode(tmp.file));
1681 if (ip->i_mount != tip->i_mount) {
1683 goto out_put_tmp_file;
1686 if (ip->i_ino == tip->i_ino) {
1688 goto out_put_tmp_file;
1691 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1693 goto out_put_tmp_file;
1696 error = xfs_swap_extents(ip, tip, sxp);
1707 * Note: some of the ioctl's return positive numbers as a
1708 * byte count indicating success, such as readlink_by_handle.
1709 * So we don't "sign flip" like most other routines. This means
1710 * true errors need to be returned as a negative value.
1718 struct inode *inode = file_inode(filp);
1719 struct xfs_inode *ip = XFS_I(inode);
1720 struct xfs_mount *mp = ip->i_mount;
1721 void __user *arg = (void __user *)p;
1724 trace_xfs_file_ioctl(ip);
1728 return xfs_ioc_trim(mp, arg);
1729 case XFS_IOC_ALLOCSP:
1730 case XFS_IOC_FREESP:
1731 case XFS_IOC_RESVSP:
1732 case XFS_IOC_UNRESVSP:
1733 case XFS_IOC_ALLOCSP64:
1734 case XFS_IOC_FREESP64:
1735 case XFS_IOC_RESVSP64:
1736 case XFS_IOC_UNRESVSP64:
1737 case XFS_IOC_ZERO_RANGE: {
1740 if (copy_from_user(&bf, arg, sizeof(bf)))
1742 return xfs_ioc_space(filp, cmd, &bf);
1744 case XFS_IOC_DIOINFO: {
1746 xfs_buftarg_t *target =
1747 XFS_IS_REALTIME_INODE(ip) ?
1748 mp->m_rtdev_targp : mp->m_ddev_targp;
1750 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1751 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1753 if (copy_to_user(arg, &da, sizeof(da)))
1758 case XFS_IOC_FSBULKSTAT_SINGLE:
1759 case XFS_IOC_FSBULKSTAT:
1760 case XFS_IOC_FSINUMBERS:
1761 return xfs_ioc_bulkstat(mp, cmd, arg);
1763 case XFS_IOC_FSGEOMETRY_V1:
1764 return xfs_ioc_fsgeometry_v1(mp, arg);
1766 case XFS_IOC_FSGEOMETRY:
1767 return xfs_ioc_fsgeometry(mp, arg);
1769 case XFS_IOC_GETVERSION:
1770 return put_user(inode->i_generation, (int __user *)arg);
1772 case XFS_IOC_FSGETXATTR:
1773 return xfs_ioc_fsgetxattr(ip, 0, arg);
1774 case XFS_IOC_FSGETXATTRA:
1775 return xfs_ioc_fsgetxattr(ip, 1, arg);
1776 case XFS_IOC_FSSETXATTR:
1777 return xfs_ioc_fssetxattr(ip, filp, arg);
1778 case XFS_IOC_GETXFLAGS:
1779 return xfs_ioc_getxflags(ip, arg);
1780 case XFS_IOC_SETXFLAGS:
1781 return xfs_ioc_setxflags(ip, filp, arg);
1783 case XFS_IOC_FSSETDM: {
1784 struct fsdmidata dmi;
1786 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1789 error = mnt_want_write_file(filp);
1793 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1795 mnt_drop_write_file(filp);
1799 case XFS_IOC_GETBMAP:
1800 case XFS_IOC_GETBMAPA:
1801 return xfs_ioc_getbmap(filp, cmd, arg);
1803 case XFS_IOC_GETBMAPX:
1804 return xfs_ioc_getbmapx(ip, arg);
1806 case XFS_IOC_FD_TO_HANDLE:
1807 case XFS_IOC_PATH_TO_HANDLE:
1808 case XFS_IOC_PATH_TO_FSHANDLE: {
1809 xfs_fsop_handlereq_t hreq;
1811 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1813 return xfs_find_handle(cmd, &hreq);
1815 case XFS_IOC_OPEN_BY_HANDLE: {
1816 xfs_fsop_handlereq_t hreq;
1818 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1820 return xfs_open_by_handle(filp, &hreq);
1822 case XFS_IOC_FSSETDM_BY_HANDLE:
1823 return xfs_fssetdm_by_handle(filp, arg);
1825 case XFS_IOC_READLINK_BY_HANDLE: {
1826 xfs_fsop_handlereq_t hreq;
1828 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1830 return xfs_readlink_by_handle(filp, &hreq);
1832 case XFS_IOC_ATTRLIST_BY_HANDLE:
1833 return xfs_attrlist_by_handle(filp, arg);
1835 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1836 return xfs_attrmulti_by_handle(filp, arg);
1838 case XFS_IOC_SWAPEXT: {
1839 struct xfs_swapext sxp;
1841 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1843 error = mnt_want_write_file(filp);
1846 error = xfs_ioc_swapext(&sxp);
1847 mnt_drop_write_file(filp);
1851 case XFS_IOC_FSCOUNTS: {
1852 xfs_fsop_counts_t out;
1854 error = xfs_fs_counts(mp, &out);
1858 if (copy_to_user(arg, &out, sizeof(out)))
1863 case XFS_IOC_SET_RESBLKS: {
1864 xfs_fsop_resblks_t inout;
1867 if (!capable(CAP_SYS_ADMIN))
1870 if (mp->m_flags & XFS_MOUNT_RDONLY)
1873 if (copy_from_user(&inout, arg, sizeof(inout)))
1876 error = mnt_want_write_file(filp);
1880 /* input parameter is passed in resblks field of structure */
1882 error = xfs_reserve_blocks(mp, &in, &inout);
1883 mnt_drop_write_file(filp);
1887 if (copy_to_user(arg, &inout, sizeof(inout)))
1892 case XFS_IOC_GET_RESBLKS: {
1893 xfs_fsop_resblks_t out;
1895 if (!capable(CAP_SYS_ADMIN))
1898 error = xfs_reserve_blocks(mp, NULL, &out);
1902 if (copy_to_user(arg, &out, sizeof(out)))
1908 case XFS_IOC_FSGROWFSDATA: {
1909 xfs_growfs_data_t in;
1911 if (copy_from_user(&in, arg, sizeof(in)))
1914 error = mnt_want_write_file(filp);
1917 error = xfs_growfs_data(mp, &in);
1918 mnt_drop_write_file(filp);
1922 case XFS_IOC_FSGROWFSLOG: {
1923 xfs_growfs_log_t in;
1925 if (copy_from_user(&in, arg, sizeof(in)))
1928 error = mnt_want_write_file(filp);
1931 error = xfs_growfs_log(mp, &in);
1932 mnt_drop_write_file(filp);
1936 case XFS_IOC_FSGROWFSRT: {
1939 if (copy_from_user(&in, arg, sizeof(in)))
1942 error = mnt_want_write_file(filp);
1945 error = xfs_growfs_rt(mp, &in);
1946 mnt_drop_write_file(filp);
1950 case XFS_IOC_GOINGDOWN: {
1953 if (!capable(CAP_SYS_ADMIN))
1956 if (get_user(in, (__uint32_t __user *)arg))
1959 return xfs_fs_goingdown(mp, in);
1962 case XFS_IOC_ERROR_INJECTION: {
1963 xfs_error_injection_t in;
1965 if (!capable(CAP_SYS_ADMIN))
1968 if (copy_from_user(&in, arg, sizeof(in)))
1971 return xfs_errortag_add(in.errtag, mp);
1974 case XFS_IOC_ERROR_CLEARALL:
1975 if (!capable(CAP_SYS_ADMIN))
1978 return xfs_errortag_clearall(mp, 1);
1980 case XFS_IOC_FREE_EOFBLOCKS: {
1981 struct xfs_fs_eofblocks eofb;
1982 struct xfs_eofblocks keofb;
1984 if (!capable(CAP_SYS_ADMIN))
1987 if (mp->m_flags & XFS_MOUNT_RDONLY)
1990 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1993 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1997 return xfs_icache_free_eofblocks(mp, &keofb);