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"
43 #include "xfs_btree.h"
44 #include <linux/fsmap.h>
45 #include "xfs_fsmap.h"
46 #include "scrub/xfs_scrub.h"
49 #include <linux/capability.h>
50 #include <linux/cred.h>
51 #include <linux/dcache.h>
52 #include <linux/mount.h>
53 #include <linux/namei.h>
54 #include <linux/pagemap.h>
55 #include <linux/slab.h>
56 #include <linux/exportfs.h>
59 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
60 * a file or fs handle.
62 * XFS_IOC_PATH_TO_FSHANDLE
63 * returns fs handle for a mount point or path within that mount point
64 * XFS_IOC_FD_TO_HANDLE
65 * returns full handle for a FD opened in user space
66 * XFS_IOC_PATH_TO_HANDLE
67 * returns full handle for a path
72 xfs_fsop_handlereq_t *hreq)
82 if (cmd == XFS_IOC_FD_TO_HANDLE) {
86 inode = file_inode(f.file);
88 error = user_lpath((const char __user *)hreq->path, &path);
91 inode = d_inode(path.dentry);
96 * We can only generate handles for inodes residing on a XFS filesystem,
97 * and only for regular files, directories or symbolic links.
100 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
104 if (!S_ISREG(inode->i_mode) &&
105 !S_ISDIR(inode->i_mode) &&
106 !S_ISLNK(inode->i_mode))
110 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
112 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
114 * This handle only contains an fsid, zero the rest.
116 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
117 hsize = sizeof(xfs_fsid_t);
119 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
120 sizeof(handle.ha_fid.fid_len);
121 handle.ha_fid.fid_pad = 0;
122 handle.ha_fid.fid_gen = inode->i_generation;
123 handle.ha_fid.fid_ino = ip->i_ino;
124 hsize = sizeof(xfs_handle_t);
128 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
129 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
135 if (cmd == XFS_IOC_FD_TO_HANDLE)
143 * No need to do permission checks on the various pathname components
144 * as the handle operations are privileged.
147 xfs_handle_acceptable(
149 struct dentry *dentry)
155 * Convert userspace handle data into a dentry.
158 xfs_handle_to_dentry(
159 struct file *parfilp,
160 void __user *uhandle,
164 struct xfs_fid64 fid;
167 * Only allow handle opens under a directory.
169 if (!S_ISDIR(file_inode(parfilp)->i_mode))
170 return ERR_PTR(-ENOTDIR);
172 if (hlen != sizeof(xfs_handle_t))
173 return ERR_PTR(-EINVAL);
174 if (copy_from_user(&handle, uhandle, hlen))
175 return ERR_PTR(-EFAULT);
176 if (handle.ha_fid.fid_len !=
177 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
178 return ERR_PTR(-EINVAL);
180 memset(&fid, 0, sizeof(struct fid));
181 fid.ino = handle.ha_fid.fid_ino;
182 fid.gen = handle.ha_fid.fid_gen;
184 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
185 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
186 xfs_handle_acceptable, NULL);
189 STATIC struct dentry *
190 xfs_handlereq_to_dentry(
191 struct file *parfilp,
192 xfs_fsop_handlereq_t *hreq)
194 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
199 struct file *parfilp,
200 xfs_fsop_handlereq_t *hreq)
202 const struct cred *cred = current_cred();
208 struct dentry *dentry;
212 if (!capable(CAP_SYS_ADMIN))
215 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
217 return PTR_ERR(dentry);
218 inode = d_inode(dentry);
220 /* Restrict xfs_open_by_handle to directories & regular files. */
221 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
226 #if BITS_PER_LONG != 32
227 hreq->oflags |= O_LARGEFILE;
230 permflag = hreq->oflags;
231 fmode = OPEN_FMODE(permflag);
232 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
233 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
238 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
243 /* Can't write directories. */
244 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
249 fd = get_unused_fd_flags(0);
255 path.mnt = parfilp->f_path.mnt;
256 path.dentry = dentry;
257 filp = dentry_open(&path, hreq->oflags, cred);
261 return PTR_ERR(filp);
264 if (S_ISREG(inode->i_mode)) {
265 filp->f_flags |= O_NOATIME;
266 filp->f_mode |= FMODE_NOCMTIME;
269 fd_install(fd, filp);
278 xfs_readlink_by_handle(
279 struct file *parfilp,
280 xfs_fsop_handlereq_t *hreq)
282 struct dentry *dentry;
286 if (!capable(CAP_SYS_ADMIN))
289 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
291 return PTR_ERR(dentry);
293 /* Restrict this handle operation to symlinks only. */
294 if (!d_is_symlink(dentry)) {
299 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
304 error = vfs_readlink(dentry, hreq->ohandle, olen);
317 xfs_mount_t *mp = ip->i_mount;
321 if (!capable(CAP_SYS_ADMIN))
324 if (XFS_FORCED_SHUTDOWN(mp))
327 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
331 xfs_ilock(ip, XFS_ILOCK_EXCL);
332 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
334 ip->i_d.di_dmevmask = evmask;
335 ip->i_d.di_dmstate = state;
337 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
338 error = xfs_trans_commit(tp);
344 xfs_fssetdm_by_handle(
345 struct file *parfilp,
349 struct fsdmidata fsd;
350 xfs_fsop_setdm_handlereq_t dmhreq;
351 struct dentry *dentry;
353 if (!capable(CAP_MKNOD))
355 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
358 error = mnt_want_write_file(parfilp);
362 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
363 if (IS_ERR(dentry)) {
364 mnt_drop_write_file(parfilp);
365 return PTR_ERR(dentry);
368 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
373 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
378 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
382 mnt_drop_write_file(parfilp);
388 xfs_attrlist_by_handle(
389 struct file *parfilp,
393 attrlist_cursor_kern_t *cursor;
394 struct xfs_fsop_attrlist_handlereq __user *p = arg;
395 xfs_fsop_attrlist_handlereq_t al_hreq;
396 struct dentry *dentry;
399 if (!capable(CAP_SYS_ADMIN))
401 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
403 if (al_hreq.buflen < sizeof(struct attrlist) ||
404 al_hreq.buflen > XFS_XATTR_LIST_MAX)
408 * Reject flags, only allow namespaces.
410 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
413 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
415 return PTR_ERR(dentry);
417 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
421 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
422 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
423 al_hreq.flags, cursor);
427 if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
432 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
443 xfs_attrmulti_attr_get(
446 unsigned char __user *ubuf,
453 if (*len > XFS_XATTR_SIZE_MAX)
455 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
459 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
463 if (copy_to_user(ubuf, kbuf, *len))
472 xfs_attrmulti_attr_set(
475 const unsigned char __user *ubuf,
482 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
484 if (len > XFS_XATTR_SIZE_MAX)
487 kbuf = memdup_user(ubuf, len);
489 return PTR_ERR(kbuf);
491 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
493 xfs_forget_acl(inode, name, flags);
499 xfs_attrmulti_attr_remove(
506 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
508 error = xfs_attr_remove(XFS_I(inode), name, flags);
510 xfs_forget_acl(inode, name, flags);
515 xfs_attrmulti_by_handle(
516 struct file *parfilp,
520 xfs_attr_multiop_t *ops;
521 xfs_fsop_attrmulti_handlereq_t am_hreq;
522 struct dentry *dentry;
523 unsigned int i, size;
524 unsigned char *attr_name;
526 if (!capable(CAP_SYS_ADMIN))
528 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
532 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
535 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
537 return PTR_ERR(dentry);
540 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
541 if (!size || size > 16 * PAGE_SIZE)
544 ops = memdup_user(am_hreq.ops, size);
546 error = PTR_ERR(ops);
551 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
556 for (i = 0; i < am_hreq.opcount; i++) {
557 ops[i].am_error = strncpy_from_user((char *)attr_name,
558 ops[i].am_attrname, MAXNAMELEN);
559 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
561 if (ops[i].am_error < 0)
564 switch (ops[i].am_opcode) {
566 ops[i].am_error = xfs_attrmulti_attr_get(
567 d_inode(dentry), attr_name,
568 ops[i].am_attrvalue, &ops[i].am_length,
572 ops[i].am_error = mnt_want_write_file(parfilp);
575 ops[i].am_error = xfs_attrmulti_attr_set(
576 d_inode(dentry), attr_name,
577 ops[i].am_attrvalue, ops[i].am_length,
579 mnt_drop_write_file(parfilp);
582 ops[i].am_error = mnt_want_write_file(parfilp);
585 ops[i].am_error = xfs_attrmulti_attr_remove(
586 d_inode(dentry), attr_name,
588 mnt_drop_write_file(parfilp);
591 ops[i].am_error = -EINVAL;
595 if (copy_to_user(am_hreq.ops, ops, size))
612 struct inode *inode = file_inode(filp);
613 struct xfs_inode *ip = XFS_I(inode);
615 enum xfs_prealloc_flags flags = 0;
616 uint iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL;
620 * Only allow the sys admin to reserve space unless
621 * unwritten extents are enabled.
623 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
624 !capable(CAP_SYS_ADMIN))
627 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
630 if (!(filp->f_mode & FMODE_WRITE))
633 if (!S_ISREG(inode->i_mode))
636 if (filp->f_flags & O_DSYNC)
637 flags |= XFS_PREALLOC_SYNC;
638 if (filp->f_mode & FMODE_NOCMTIME)
639 flags |= XFS_PREALLOC_INVISIBLE;
641 error = mnt_want_write_file(filp);
645 xfs_ilock(ip, iolock);
646 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP);
650 switch (bf->l_whence) {
654 bf->l_start += filp->f_pos;
657 bf->l_start += XFS_ISIZE(ip);
665 * length of <= 0 for resv/unresv/zero is invalid. length for
666 * alloc/free is ignored completely and we have no idea what userspace
667 * might have set it to, so set it to zero to allow range
671 case XFS_IOC_ZERO_RANGE:
673 case XFS_IOC_RESVSP64:
674 case XFS_IOC_UNRESVSP:
675 case XFS_IOC_UNRESVSP64:
676 if (bf->l_len <= 0) {
686 if (bf->l_start < 0 ||
687 bf->l_start > inode->i_sb->s_maxbytes ||
688 bf->l_start + bf->l_len < 0 ||
689 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
695 case XFS_IOC_ZERO_RANGE:
696 flags |= XFS_PREALLOC_SET;
697 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
700 case XFS_IOC_RESVSP64:
701 flags |= XFS_PREALLOC_SET;
702 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
705 case XFS_IOC_UNRESVSP:
706 case XFS_IOC_UNRESVSP64:
707 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
709 case XFS_IOC_ALLOCSP:
710 case XFS_IOC_ALLOCSP64:
712 case XFS_IOC_FREESP64:
713 flags |= XFS_PREALLOC_CLEAR;
714 if (bf->l_start > XFS_ISIZE(ip)) {
715 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
716 bf->l_start - XFS_ISIZE(ip), 0);
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->m_sb, &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->m_sb, &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(xfs_find_bdev_for_inode(VFS_I(ip)),
1107 /* If the DAX state is not changing, we have nothing to do here. */
1108 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1110 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1113 /* lock, flush and invalidate mapping in preparation for flag change */
1114 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1115 error = filemap_write_and_wait(inode->i_mapping);
1118 error = invalidate_inode_pages2(inode->i_mapping);
1122 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1126 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1132 * Set up the transaction structure for the setattr operation, checking that we
1133 * have permission to do so. On success, return a clean transaction and the
1134 * inode locked exclusively ready for further operation specific checks. On
1135 * failure, return an error without modifying or locking the inode.
1137 * The inode might already be IO locked on call. If this is the case, it is
1138 * indicated in @join_flags and we take full responsibility for ensuring they
1139 * are unlocked from now on. Hence if we have an error here, we still have to
1140 * unlock them. Otherwise, once they are joined to the transaction, they will
1141 * be unlocked on commit/cancel.
1143 static struct xfs_trans *
1144 xfs_ioctl_setattr_get_trans(
1145 struct xfs_inode *ip,
1148 struct xfs_mount *mp = ip->i_mount;
1149 struct xfs_trans *tp;
1152 if (mp->m_flags & XFS_MOUNT_RDONLY)
1155 if (XFS_FORCED_SHUTDOWN(mp))
1158 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1160 return ERR_PTR(error);
1162 xfs_ilock(ip, XFS_ILOCK_EXCL);
1163 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1167 * CAP_FOWNER overrides the following restrictions:
1169 * The user ID of the calling process must be equal to the file owner
1170 * ID, except in cases where the CAP_FSETID capability is applicable.
1172 if (!inode_owner_or_capable(VFS_I(ip))) {
1177 if (mp->m_flags & XFS_MOUNT_WSYNC)
1178 xfs_trans_set_sync(tp);
1183 xfs_trans_cancel(tp);
1186 xfs_iunlock(ip, join_flags);
1187 return ERR_PTR(error);
1191 * extent size hint validation is somewhat cumbersome. Rules are:
1193 * 1. extent size hint is only valid for directories and regular files
1194 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1195 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1196 * 4. can only be changed on regular files if no extents are allocated
1197 * 5. can be changed on directories at any time
1198 * 6. extsize hint of 0 turns off hints, clears inode flags.
1199 * 7. Extent size must be a multiple of the appropriate block size.
1200 * 8. for non-realtime files, the extent size hint must be limited
1201 * to half the AG size to avoid alignment extending the extent beyond the
1204 * Please keep this function in sync with xfs_scrub_inode_extsize.
1207 xfs_ioctl_setattr_check_extsize(
1208 struct xfs_inode *ip,
1211 struct xfs_mount *mp = ip->i_mount;
1213 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
1216 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
1217 !S_ISDIR(VFS_I(ip)->i_mode))
1220 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1221 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1224 if (fa->fsx_extsize != 0) {
1226 xfs_fsblock_t extsize_fsb;
1228 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1229 if (extsize_fsb > MAXEXTLEN)
1232 if (XFS_IS_REALTIME_INODE(ip) ||
1233 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1234 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1236 size = mp->m_sb.sb_blocksize;
1237 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1241 if (fa->fsx_extsize % size)
1244 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
1250 * CoW extent size hint validation rules are:
1252 * 1. CoW extent size hint can only be set if reflink is enabled on the fs.
1253 * The inode does not have to have any shared blocks, but it must be a v3.
1254 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
1255 * for a directory, the hint is propagated to new files.
1256 * 3. Can be changed on files & directories at any time.
1257 * 4. CoW extsize hint of 0 turns off hints, clears inode flags.
1258 * 5. Extent size must be a multiple of the appropriate block size.
1259 * 6. The extent size hint must be limited to half the AG size to avoid
1260 * alignment extending the extent beyond the limits of the AG.
1262 * Please keep this function in sync with xfs_scrub_inode_cowextsize.
1265 xfs_ioctl_setattr_check_cowextsize(
1266 struct xfs_inode *ip,
1269 struct xfs_mount *mp = ip->i_mount;
1271 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
1274 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) ||
1275 ip->i_d.di_version != 3)
1278 if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode))
1281 if (fa->fsx_cowextsize != 0) {
1283 xfs_fsblock_t cowextsize_fsb;
1285 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1286 if (cowextsize_fsb > MAXEXTLEN)
1289 size = mp->m_sb.sb_blocksize;
1290 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
1293 if (fa->fsx_cowextsize % size)
1296 fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;
1302 xfs_ioctl_setattr_check_projid(
1303 struct xfs_inode *ip,
1306 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1307 if (fa->fsx_projid > (uint16_t)-1 &&
1308 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1312 * Project Quota ID state is only allowed to change from within the init
1313 * namespace. Enforce that restriction only if we are trying to change
1314 * the quota ID state. Everything else is allowed in user namespaces.
1316 if (current_user_ns() == &init_user_ns)
1319 if (xfs_get_projid(ip) != fa->fsx_projid)
1321 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
1322 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1333 struct xfs_mount *mp = ip->i_mount;
1334 struct xfs_trans *tp;
1335 struct xfs_dquot *udqp = NULL;
1336 struct xfs_dquot *pdqp = NULL;
1337 struct xfs_dquot *olddquot = NULL;
1341 trace_xfs_ioctl_setattr(ip);
1343 code = xfs_ioctl_setattr_check_projid(ip, fa);
1348 * If disk quotas is on, we make sure that the dquots do exist on disk,
1349 * before we start any other transactions. Trying to do this later
1350 * is messy. We don't care to take a readlock to look at the ids
1351 * in inode here, because we can't hold it across the trans_reserve.
1352 * If the IDs do change before we take the ilock, we're covered
1353 * because the i_*dquot fields will get updated anyway.
1355 if (XFS_IS_QUOTA_ON(mp)) {
1356 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1357 ip->i_d.di_gid, fa->fsx_projid,
1358 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1364 * Changing DAX config may require inode locking for mapping
1365 * invalidation. These need to be held all the way to transaction commit
1366 * or cancel time, so need to be passed through to
1367 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1370 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1372 goto error_free_dquots;
1374 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1377 goto error_free_dquots;
1381 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1382 xfs_get_projid(ip) != fa->fsx_projid) {
1383 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1384 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1385 if (code) /* out of quota */
1386 goto error_trans_cancel;
1389 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1391 goto error_trans_cancel;
1393 code = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1395 goto error_trans_cancel;
1397 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1399 goto error_trans_cancel;
1402 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1403 * overrides the following restrictions:
1405 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1406 * successful return from chown()
1409 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1410 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1411 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1413 /* Change the ownerships and register project quota modifications */
1414 if (xfs_get_projid(ip) != fa->fsx_projid) {
1415 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1416 olddquot = xfs_qm_vop_chown(tp, ip,
1417 &ip->i_pdquot, pdqp);
1419 ASSERT(ip->i_d.di_version > 1);
1420 xfs_set_projid(ip, fa->fsx_projid);
1424 * Only set the extent size hint if we've already determined that the
1425 * extent size hint should be set on the inode. If no extent size flags
1426 * are set on the inode then unconditionally clear the extent size hint.
1428 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1429 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1431 ip->i_d.di_extsize = 0;
1432 if (ip->i_d.di_version == 3 &&
1433 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
1434 ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
1435 mp->m_sb.sb_blocklog;
1437 ip->i_d.di_cowextsize = 0;
1439 code = xfs_trans_commit(tp);
1442 * Release any dquot(s) the inode had kept before chown.
1444 xfs_qm_dqrele(olddquot);
1445 xfs_qm_dqrele(udqp);
1446 xfs_qm_dqrele(pdqp);
1451 xfs_trans_cancel(tp);
1453 xfs_qm_dqrele(udqp);
1454 xfs_qm_dqrele(pdqp);
1467 if (copy_from_user(&fa, arg, sizeof(fa)))
1470 error = mnt_want_write_file(filp);
1473 error = xfs_ioctl_setattr(ip, &fa);
1474 mnt_drop_write_file(filp);
1485 flags = xfs_di2lxflags(ip->i_d.di_flags);
1486 if (copy_to_user(arg, &flags, sizeof(flags)))
1493 struct xfs_inode *ip,
1497 struct xfs_trans *tp;
1503 if (copy_from_user(&flags, arg, sizeof(flags)))
1506 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1507 FS_NOATIME_FL | FS_NODUMP_FL | \
1511 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1513 error = mnt_want_write_file(filp);
1518 * Changing DAX config may require inode locking for mapping
1519 * invalidation. These need to be held all the way to transaction commit
1520 * or cancel time, so need to be passed through to
1521 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1524 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1526 goto out_drop_write;
1528 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1530 error = PTR_ERR(tp);
1531 goto out_drop_write;
1534 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1536 xfs_trans_cancel(tp);
1537 goto out_drop_write;
1540 error = xfs_trans_commit(tp);
1542 mnt_drop_write_file(filp);
1549 struct getbmapx __user *u,
1552 if (put_user(p->bmv_offset, &u->bmv_offset) ||
1553 put_user(p->bmv_block, &u->bmv_block) ||
1554 put_user(p->bmv_length, &u->bmv_length) ||
1555 put_user(0, &u->bmv_count) ||
1556 put_user(0, &u->bmv_entries))
1558 if (recsize < sizeof(struct getbmapx))
1560 if (put_user(0, &u->bmv_iflags) ||
1561 put_user(p->bmv_oflags, &u->bmv_oflags) ||
1562 put_user(0, &u->bmv_unused1) ||
1563 put_user(0, &u->bmv_unused2))
1574 struct getbmapx bmx = { 0 };
1575 struct kgetbmap *buf;
1580 case XFS_IOC_GETBMAPA:
1581 bmx.bmv_iflags = BMV_IF_ATTRFORK;
1583 case XFS_IOC_GETBMAP:
1584 if (file->f_mode & FMODE_NOCMTIME)
1585 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1586 /* struct getbmap is a strict subset of struct getbmapx. */
1587 recsize = sizeof(struct getbmap);
1589 case XFS_IOC_GETBMAPX:
1590 recsize = sizeof(struct getbmapx);
1596 if (copy_from_user(&bmx, arg, recsize))
1599 if (bmx.bmv_count < 2)
1601 if (bmx.bmv_count > ULONG_MAX / recsize)
1604 buf = kmem_zalloc_large(bmx.bmv_count * sizeof(*buf), 0);
1608 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
1613 if (copy_to_user(arg, &bmx, recsize))
1617 for (i = 0; i < bmx.bmv_entries; i++) {
1618 if (!xfs_getbmap_format(buf + i, arg, recsize))
1629 struct getfsmap_info {
1630 struct xfs_mount *mp;
1631 struct fsmap_head __user *data;
1637 xfs_getfsmap_format(struct xfs_fsmap *xfm, void *priv)
1639 struct getfsmap_info *info = priv;
1642 trace_xfs_getfsmap_mapping(info->mp, xfm);
1644 info->last_flags = xfm->fmr_flags;
1645 xfs_fsmap_from_internal(&fm, xfm);
1646 if (copy_to_user(&info->data->fmh_recs[info->idx++], &fm,
1647 sizeof(struct fsmap)))
1655 struct xfs_inode *ip,
1656 struct fsmap_head __user *arg)
1658 struct getfsmap_info info = { NULL };
1659 struct xfs_fsmap_head xhead = {0};
1660 struct fsmap_head head;
1661 bool aborted = false;
1664 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1666 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1667 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1668 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1669 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1670 sizeof(head.fmh_keys[1].fmr_reserved)))
1673 xhead.fmh_iflags = head.fmh_iflags;
1674 xhead.fmh_count = head.fmh_count;
1675 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1676 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1678 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1679 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1681 info.mp = ip->i_mount;
1683 error = xfs_getfsmap(ip->i_mount, &xhead, xfs_getfsmap_format, &info);
1684 if (error == XFS_BTREE_QUERY_RANGE_ABORT) {
1690 /* If we didn't abort, set the "last" flag in the last fmx */
1691 if (!aborted && info.idx) {
1692 info.last_flags |= FMR_OF_LAST;
1693 if (copy_to_user(&info.data->fmh_recs[info.idx - 1].fmr_flags,
1694 &info.last_flags, sizeof(info.last_flags)))
1698 /* copy back header */
1699 head.fmh_entries = xhead.fmh_entries;
1700 head.fmh_oflags = xhead.fmh_oflags;
1701 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
1708 xfs_ioc_scrub_metadata(
1709 struct xfs_inode *ip,
1712 struct xfs_scrub_metadata scrub;
1715 if (!capable(CAP_SYS_ADMIN))
1718 if (copy_from_user(&scrub, arg, sizeof(scrub)))
1721 error = xfs_scrub_metadata(ip, &scrub);
1725 if (copy_to_user(arg, &scrub, sizeof(scrub)))
1735 xfs_inode_t *ip, *tip;
1739 /* Pull information for the target fd */
1740 f = fdget((int)sxp->sx_fdtarget);
1746 if (!(f.file->f_mode & FMODE_WRITE) ||
1747 !(f.file->f_mode & FMODE_READ) ||
1748 (f.file->f_flags & O_APPEND)) {
1753 tmp = fdget((int)sxp->sx_fdtmp);
1759 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1760 !(tmp.file->f_mode & FMODE_READ) ||
1761 (tmp.file->f_flags & O_APPEND)) {
1763 goto out_put_tmp_file;
1766 if (IS_SWAPFILE(file_inode(f.file)) ||
1767 IS_SWAPFILE(file_inode(tmp.file))) {
1769 goto out_put_tmp_file;
1773 * We need to ensure that the fds passed in point to XFS inodes
1774 * before we cast and access them as XFS structures as we have no
1775 * control over what the user passes us here.
1777 if (f.file->f_op != &xfs_file_operations ||
1778 tmp.file->f_op != &xfs_file_operations) {
1780 goto out_put_tmp_file;
1783 ip = XFS_I(file_inode(f.file));
1784 tip = XFS_I(file_inode(tmp.file));
1786 if (ip->i_mount != tip->i_mount) {
1788 goto out_put_tmp_file;
1791 if (ip->i_ino == tip->i_ino) {
1793 goto out_put_tmp_file;
1796 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1798 goto out_put_tmp_file;
1801 error = xfs_swap_extents(ip, tip, sxp);
1813 struct xfs_mount *mp,
1814 char __user *user_label)
1816 struct xfs_sb *sbp = &mp->m_sb;
1817 char label[XFSLABEL_MAX + 1];
1820 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
1822 spin_lock(&mp->m_sb_lock);
1823 strncpy(label, sbp->sb_fname, sizeof(sbp->sb_fname));
1824 spin_unlock(&mp->m_sb_lock);
1826 /* xfs on-disk label is 12 chars, be sure we send a null to user */
1827 label[XFSLABEL_MAX] = '\0';
1828 if (copy_to_user(user_label, label, sizeof(sbp->sb_fname)))
1836 struct xfs_mount *mp,
1837 char __user *newlabel)
1839 struct xfs_sb *sbp = &mp->m_sb;
1840 char label[XFSLABEL_MAX + 1];
1844 if (!capable(CAP_SYS_ADMIN))
1847 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
1848 * smaller, at 12 bytes. We copy one more to be sure we find the
1849 * (required) NULL character to test the incoming label length.
1850 * NB: The on disk label doesn't need to be null terminated.
1852 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
1854 len = strnlen(label, XFSLABEL_MAX + 1);
1855 if (len > sizeof(sbp->sb_fname))
1858 error = mnt_want_write_file(filp);
1862 spin_lock(&mp->m_sb_lock);
1863 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
1864 strncpy(sbp->sb_fname, label, sizeof(sbp->sb_fname));
1865 spin_unlock(&mp->m_sb_lock);
1868 * Now we do several things to satisfy userspace.
1869 * In addition to normal logging of the primary superblock, we also
1870 * immediately write these changes to sector zero for the primary, then
1871 * update all backup supers (as xfs_db does for a label change), then
1872 * invalidate the block device page cache. This is so that any prior
1873 * buffered reads from userspace (i.e. from blkid) are invalidated,
1874 * and userspace will see the newly-written label.
1876 error = xfs_sync_sb_buf(mp);
1880 * growfs also updates backup supers so lock against that.
1882 mutex_lock(&mp->m_growlock);
1883 error = xfs_update_secondary_sbs(mp);
1884 mutex_unlock(&mp->m_growlock);
1886 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
1889 mnt_drop_write_file(filp);
1894 * Note: some of the ioctl's return positive numbers as a
1895 * byte count indicating success, such as readlink_by_handle.
1896 * So we don't "sign flip" like most other routines. This means
1897 * true errors need to be returned as a negative value.
1905 struct inode *inode = file_inode(filp);
1906 struct xfs_inode *ip = XFS_I(inode);
1907 struct xfs_mount *mp = ip->i_mount;
1908 void __user *arg = (void __user *)p;
1911 trace_xfs_file_ioctl(ip);
1915 return xfs_ioc_trim(mp, arg);
1916 case FS_IOC_GETFSLABEL:
1917 return xfs_ioc_getlabel(mp, arg);
1918 case FS_IOC_SETFSLABEL:
1919 return xfs_ioc_setlabel(filp, mp, arg);
1920 case XFS_IOC_ALLOCSP:
1921 case XFS_IOC_FREESP:
1922 case XFS_IOC_RESVSP:
1923 case XFS_IOC_UNRESVSP:
1924 case XFS_IOC_ALLOCSP64:
1925 case XFS_IOC_FREESP64:
1926 case XFS_IOC_RESVSP64:
1927 case XFS_IOC_UNRESVSP64:
1928 case XFS_IOC_ZERO_RANGE: {
1931 if (copy_from_user(&bf, arg, sizeof(bf)))
1933 return xfs_ioc_space(filp, cmd, &bf);
1935 case XFS_IOC_DIOINFO: {
1937 xfs_buftarg_t *target =
1938 XFS_IS_REALTIME_INODE(ip) ?
1939 mp->m_rtdev_targp : mp->m_ddev_targp;
1941 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1942 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1944 if (copy_to_user(arg, &da, sizeof(da)))
1949 case XFS_IOC_FSBULKSTAT_SINGLE:
1950 case XFS_IOC_FSBULKSTAT:
1951 case XFS_IOC_FSINUMBERS:
1952 return xfs_ioc_bulkstat(mp, cmd, arg);
1954 case XFS_IOC_FSGEOMETRY_V1:
1955 return xfs_ioc_fsgeometry_v1(mp, arg);
1957 case XFS_IOC_FSGEOMETRY:
1958 return xfs_ioc_fsgeometry(mp, arg);
1960 case XFS_IOC_GETVERSION:
1961 return put_user(inode->i_generation, (int __user *)arg);
1963 case XFS_IOC_FSGETXATTR:
1964 return xfs_ioc_fsgetxattr(ip, 0, arg);
1965 case XFS_IOC_FSGETXATTRA:
1966 return xfs_ioc_fsgetxattr(ip, 1, arg);
1967 case XFS_IOC_FSSETXATTR:
1968 return xfs_ioc_fssetxattr(ip, filp, arg);
1969 case XFS_IOC_GETXFLAGS:
1970 return xfs_ioc_getxflags(ip, arg);
1971 case XFS_IOC_SETXFLAGS:
1972 return xfs_ioc_setxflags(ip, filp, arg);
1974 case XFS_IOC_FSSETDM: {
1975 struct fsdmidata dmi;
1977 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1980 error = mnt_want_write_file(filp);
1984 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1986 mnt_drop_write_file(filp);
1990 case XFS_IOC_GETBMAP:
1991 case XFS_IOC_GETBMAPA:
1992 case XFS_IOC_GETBMAPX:
1993 return xfs_ioc_getbmap(filp, cmd, arg);
1995 case FS_IOC_GETFSMAP:
1996 return xfs_ioc_getfsmap(ip, arg);
1998 case XFS_IOC_SCRUB_METADATA:
1999 return xfs_ioc_scrub_metadata(ip, arg);
2001 case XFS_IOC_FD_TO_HANDLE:
2002 case XFS_IOC_PATH_TO_HANDLE:
2003 case XFS_IOC_PATH_TO_FSHANDLE: {
2004 xfs_fsop_handlereq_t hreq;
2006 if (copy_from_user(&hreq, arg, sizeof(hreq)))
2008 return xfs_find_handle(cmd, &hreq);
2010 case XFS_IOC_OPEN_BY_HANDLE: {
2011 xfs_fsop_handlereq_t hreq;
2013 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2015 return xfs_open_by_handle(filp, &hreq);
2017 case XFS_IOC_FSSETDM_BY_HANDLE:
2018 return xfs_fssetdm_by_handle(filp, arg);
2020 case XFS_IOC_READLINK_BY_HANDLE: {
2021 xfs_fsop_handlereq_t hreq;
2023 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2025 return xfs_readlink_by_handle(filp, &hreq);
2027 case XFS_IOC_ATTRLIST_BY_HANDLE:
2028 return xfs_attrlist_by_handle(filp, arg);
2030 case XFS_IOC_ATTRMULTI_BY_HANDLE:
2031 return xfs_attrmulti_by_handle(filp, arg);
2033 case XFS_IOC_SWAPEXT: {
2034 struct xfs_swapext sxp;
2036 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
2038 error = mnt_want_write_file(filp);
2041 error = xfs_ioc_swapext(&sxp);
2042 mnt_drop_write_file(filp);
2046 case XFS_IOC_FSCOUNTS: {
2047 xfs_fsop_counts_t out;
2049 error = xfs_fs_counts(mp, &out);
2053 if (copy_to_user(arg, &out, sizeof(out)))
2058 case XFS_IOC_SET_RESBLKS: {
2059 xfs_fsop_resblks_t inout;
2062 if (!capable(CAP_SYS_ADMIN))
2065 if (mp->m_flags & XFS_MOUNT_RDONLY)
2068 if (copy_from_user(&inout, arg, sizeof(inout)))
2071 error = mnt_want_write_file(filp);
2075 /* input parameter is passed in resblks field of structure */
2077 error = xfs_reserve_blocks(mp, &in, &inout);
2078 mnt_drop_write_file(filp);
2082 if (copy_to_user(arg, &inout, sizeof(inout)))
2087 case XFS_IOC_GET_RESBLKS: {
2088 xfs_fsop_resblks_t out;
2090 if (!capable(CAP_SYS_ADMIN))
2093 error = xfs_reserve_blocks(mp, NULL, &out);
2097 if (copy_to_user(arg, &out, sizeof(out)))
2103 case XFS_IOC_FSGROWFSDATA: {
2104 xfs_growfs_data_t in;
2106 if (copy_from_user(&in, arg, sizeof(in)))
2109 error = mnt_want_write_file(filp);
2112 error = xfs_growfs_data(mp, &in);
2113 mnt_drop_write_file(filp);
2117 case XFS_IOC_FSGROWFSLOG: {
2118 xfs_growfs_log_t in;
2120 if (copy_from_user(&in, arg, sizeof(in)))
2123 error = mnt_want_write_file(filp);
2126 error = xfs_growfs_log(mp, &in);
2127 mnt_drop_write_file(filp);
2131 case XFS_IOC_FSGROWFSRT: {
2134 if (copy_from_user(&in, arg, sizeof(in)))
2137 error = mnt_want_write_file(filp);
2140 error = xfs_growfs_rt(mp, &in);
2141 mnt_drop_write_file(filp);
2145 case XFS_IOC_GOINGDOWN: {
2148 if (!capable(CAP_SYS_ADMIN))
2151 if (get_user(in, (uint32_t __user *)arg))
2154 return xfs_fs_goingdown(mp, in);
2157 case XFS_IOC_ERROR_INJECTION: {
2158 xfs_error_injection_t in;
2160 if (!capable(CAP_SYS_ADMIN))
2163 if (copy_from_user(&in, arg, sizeof(in)))
2166 return xfs_errortag_add(mp, in.errtag);
2169 case XFS_IOC_ERROR_CLEARALL:
2170 if (!capable(CAP_SYS_ADMIN))
2173 return xfs_errortag_clearall(mp);
2175 case XFS_IOC_FREE_EOFBLOCKS: {
2176 struct xfs_fs_eofblocks eofb;
2177 struct xfs_eofblocks keofb;
2179 if (!capable(CAP_SYS_ADMIN))
2182 if (mp->m_flags & XFS_MOUNT_RDONLY)
2185 if (copy_from_user(&eofb, arg, sizeof(eofb)))
2188 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
2192 return xfs_icache_free_eofblocks(mp, &keofb);