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"
44 #include "xfs_btree.h"
45 #include <linux/fsmap.h>
46 #include "xfs_fsmap.h"
47 #include "scrub/xfs_scrub.h"
50 #include <linux/capability.h>
51 #include <linux/cred.h>
52 #include <linux/dcache.h>
53 #include <linux/mount.h>
54 #include <linux/namei.h>
55 #include <linux/pagemap.h>
56 #include <linux/slab.h>
57 #include <linux/exportfs.h>
60 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
61 * a file or fs handle.
63 * XFS_IOC_PATH_TO_FSHANDLE
64 * returns fs handle for a mount point or path within that mount point
65 * XFS_IOC_FD_TO_HANDLE
66 * returns full handle for a FD opened in user space
67 * XFS_IOC_PATH_TO_HANDLE
68 * returns full handle for a path
73 xfs_fsop_handlereq_t *hreq)
83 if (cmd == XFS_IOC_FD_TO_HANDLE) {
87 inode = file_inode(f.file);
89 error = user_lpath((const char __user *)hreq->path, &path);
92 inode = d_inode(path.dentry);
97 * We can only generate handles for inodes residing on a XFS filesystem,
98 * and only for regular files, directories or symbolic links.
101 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
105 if (!S_ISREG(inode->i_mode) &&
106 !S_ISDIR(inode->i_mode) &&
107 !S_ISLNK(inode->i_mode))
111 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
113 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
115 * This handle only contains an fsid, zero the rest.
117 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
118 hsize = sizeof(xfs_fsid_t);
120 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
121 sizeof(handle.ha_fid.fid_len);
122 handle.ha_fid.fid_pad = 0;
123 handle.ha_fid.fid_gen = inode->i_generation;
124 handle.ha_fid.fid_ino = ip->i_ino;
125 hsize = sizeof(xfs_handle_t);
129 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
130 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
136 if (cmd == XFS_IOC_FD_TO_HANDLE)
144 * No need to do permission checks on the various pathname components
145 * as the handle operations are privileged.
148 xfs_handle_acceptable(
150 struct dentry *dentry)
156 * Convert userspace handle data into a dentry.
159 xfs_handle_to_dentry(
160 struct file *parfilp,
161 void __user *uhandle,
165 struct xfs_fid64 fid;
168 * Only allow handle opens under a directory.
170 if (!S_ISDIR(file_inode(parfilp)->i_mode))
171 return ERR_PTR(-ENOTDIR);
173 if (hlen != sizeof(xfs_handle_t))
174 return ERR_PTR(-EINVAL);
175 if (copy_from_user(&handle, uhandle, hlen))
176 return ERR_PTR(-EFAULT);
177 if (handle.ha_fid.fid_len !=
178 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
179 return ERR_PTR(-EINVAL);
181 memset(&fid, 0, sizeof(struct fid));
182 fid.ino = handle.ha_fid.fid_ino;
183 fid.gen = handle.ha_fid.fid_gen;
185 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
186 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
187 xfs_handle_acceptable, NULL);
190 STATIC struct dentry *
191 xfs_handlereq_to_dentry(
192 struct file *parfilp,
193 xfs_fsop_handlereq_t *hreq)
195 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
200 struct file *parfilp,
201 xfs_fsop_handlereq_t *hreq)
203 const struct cred *cred = current_cred();
209 struct dentry *dentry;
213 if (!capable(CAP_SYS_ADMIN))
216 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
218 return PTR_ERR(dentry);
219 inode = d_inode(dentry);
221 /* Restrict xfs_open_by_handle to directories & regular files. */
222 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
227 #if BITS_PER_LONG != 32
228 hreq->oflags |= O_LARGEFILE;
231 permflag = hreq->oflags;
232 fmode = OPEN_FMODE(permflag);
233 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
234 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
239 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
244 /* Can't write directories. */
245 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
250 fd = get_unused_fd_flags(0);
256 path.mnt = parfilp->f_path.mnt;
257 path.dentry = dentry;
258 filp = dentry_open(&path, hreq->oflags, cred);
262 return PTR_ERR(filp);
265 if (S_ISREG(inode->i_mode)) {
266 filp->f_flags |= O_NOATIME;
267 filp->f_mode |= FMODE_NOCMTIME;
270 fd_install(fd, filp);
279 xfs_readlink_by_handle(
280 struct file *parfilp,
281 xfs_fsop_handlereq_t *hreq)
283 struct dentry *dentry;
287 if (!capable(CAP_SYS_ADMIN))
290 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
292 return PTR_ERR(dentry);
294 /* Restrict this handle operation to symlinks only. */
295 if (!d_is_symlink(dentry)) {
300 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
305 error = vfs_readlink(dentry, hreq->ohandle, olen);
318 xfs_mount_t *mp = ip->i_mount;
322 if (!capable(CAP_SYS_ADMIN))
325 if (XFS_FORCED_SHUTDOWN(mp))
328 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
332 xfs_ilock(ip, XFS_ILOCK_EXCL);
333 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
335 ip->i_d.di_dmevmask = evmask;
336 ip->i_d.di_dmstate = state;
338 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
339 error = xfs_trans_commit(tp);
345 xfs_fssetdm_by_handle(
346 struct file *parfilp,
350 struct fsdmidata fsd;
351 xfs_fsop_setdm_handlereq_t dmhreq;
352 struct dentry *dentry;
354 if (!capable(CAP_MKNOD))
356 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
359 error = mnt_want_write_file(parfilp);
363 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
364 if (IS_ERR(dentry)) {
365 mnt_drop_write_file(parfilp);
366 return PTR_ERR(dentry);
369 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
374 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
379 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
383 mnt_drop_write_file(parfilp);
389 xfs_attrlist_by_handle(
390 struct file *parfilp,
394 attrlist_cursor_kern_t *cursor;
395 struct xfs_fsop_attrlist_handlereq __user *p = arg;
396 xfs_fsop_attrlist_handlereq_t al_hreq;
397 struct dentry *dentry;
400 if (!capable(CAP_SYS_ADMIN))
402 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
404 if (al_hreq.buflen < sizeof(struct attrlist) ||
405 al_hreq.buflen > XFS_XATTR_LIST_MAX)
409 * Reject flags, only allow namespaces.
411 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
414 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
416 return PTR_ERR(dentry);
418 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
422 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
423 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
424 al_hreq.flags, cursor);
428 if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
433 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
444 xfs_attrmulti_attr_get(
447 unsigned char __user *ubuf,
454 if (*len > XFS_XATTR_SIZE_MAX)
456 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
460 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
464 if (copy_to_user(ubuf, kbuf, *len))
473 xfs_attrmulti_attr_set(
476 const unsigned char __user *ubuf,
483 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
485 if (len > XFS_XATTR_SIZE_MAX)
488 kbuf = memdup_user(ubuf, len);
490 return PTR_ERR(kbuf);
492 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
494 xfs_forget_acl(inode, name, flags);
500 xfs_attrmulti_attr_remove(
507 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
509 error = xfs_attr_remove(XFS_I(inode), name, flags);
511 xfs_forget_acl(inode, name, flags);
516 xfs_attrmulti_by_handle(
517 struct file *parfilp,
521 xfs_attr_multiop_t *ops;
522 xfs_fsop_attrmulti_handlereq_t am_hreq;
523 struct dentry *dentry;
524 unsigned int i, size;
525 unsigned char *attr_name;
527 if (!capable(CAP_SYS_ADMIN))
529 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
533 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
536 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
538 return PTR_ERR(dentry);
541 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
542 if (!size || size > 16 * PAGE_SIZE)
545 ops = memdup_user(am_hreq.ops, size);
547 error = PTR_ERR(ops);
552 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
557 for (i = 0; i < am_hreq.opcount; i++) {
558 ops[i].am_error = strncpy_from_user((char *)attr_name,
559 ops[i].am_attrname, MAXNAMELEN);
560 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
562 if (ops[i].am_error < 0)
565 switch (ops[i].am_opcode) {
567 ops[i].am_error = xfs_attrmulti_attr_get(
568 d_inode(dentry), attr_name,
569 ops[i].am_attrvalue, &ops[i].am_length,
573 ops[i].am_error = mnt_want_write_file(parfilp);
576 ops[i].am_error = xfs_attrmulti_attr_set(
577 d_inode(dentry), attr_name,
578 ops[i].am_attrvalue, ops[i].am_length,
580 mnt_drop_write_file(parfilp);
583 ops[i].am_error = mnt_want_write_file(parfilp);
586 ops[i].am_error = xfs_attrmulti_attr_remove(
587 d_inode(dentry), attr_name,
589 mnt_drop_write_file(parfilp);
592 ops[i].am_error = -EINVAL;
596 if (copy_to_user(am_hreq.ops, ops, size))
613 struct inode *inode = file_inode(filp);
614 struct xfs_inode *ip = XFS_I(inode);
616 enum xfs_prealloc_flags flags = 0;
617 uint iolock = XFS_IOLOCK_EXCL;
621 * Only allow the sys admin to reserve space unless
622 * unwritten extents are enabled.
624 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
625 !capable(CAP_SYS_ADMIN))
628 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
631 if (!(filp->f_mode & FMODE_WRITE))
634 if (!S_ISREG(inode->i_mode))
637 if (filp->f_flags & O_DSYNC)
638 flags |= XFS_PREALLOC_SYNC;
639 if (filp->f_mode & FMODE_NOCMTIME)
640 flags |= XFS_PREALLOC_INVISIBLE;
642 error = mnt_want_write_file(filp);
646 xfs_ilock(ip, iolock);
647 error = xfs_break_layouts(inode, &iolock);
651 xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
652 iolock |= XFS_MMAPLOCK_EXCL;
654 switch (bf->l_whence) {
658 bf->l_start += filp->f_pos;
661 bf->l_start += XFS_ISIZE(ip);
669 * length of <= 0 for resv/unresv/zero is invalid. length for
670 * alloc/free is ignored completely and we have no idea what userspace
671 * might have set it to, so set it to zero to allow range
675 case XFS_IOC_ZERO_RANGE:
677 case XFS_IOC_RESVSP64:
678 case XFS_IOC_UNRESVSP:
679 case XFS_IOC_UNRESVSP64:
680 if (bf->l_len <= 0) {
690 if (bf->l_start < 0 ||
691 bf->l_start > inode->i_sb->s_maxbytes ||
692 bf->l_start + bf->l_len < 0 ||
693 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
699 case XFS_IOC_ZERO_RANGE:
700 flags |= XFS_PREALLOC_SET;
701 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
704 case XFS_IOC_RESVSP64:
705 flags |= XFS_PREALLOC_SET;
706 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
709 case XFS_IOC_UNRESVSP:
710 case XFS_IOC_UNRESVSP64:
711 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
713 case XFS_IOC_ALLOCSP:
714 case XFS_IOC_ALLOCSP64:
716 case XFS_IOC_FREESP64:
717 flags |= XFS_PREALLOC_CLEAR;
718 if (bf->l_start > XFS_ISIZE(ip)) {
719 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
720 bf->l_start - XFS_ISIZE(ip), 0);
725 iattr.ia_valid = ATTR_SIZE;
726 iattr.ia_size = bf->l_start;
728 error = xfs_vn_setattr_size(file_dentry(filp), &iattr);
738 error = xfs_update_prealloc_flags(ip, flags);
741 xfs_iunlock(ip, iolock);
742 mnt_drop_write_file(filp);
752 xfs_fsop_bulkreq_t bulkreq;
753 int count; /* # of records returned */
754 xfs_ino_t inlast; /* last inode number */
758 /* done = 1 if there are more stats to get and if bulkstat */
759 /* should be called again (unused here, but used in dmapi) */
761 if (!capable(CAP_SYS_ADMIN))
764 if (XFS_FORCED_SHUTDOWN(mp))
767 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
770 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
773 if ((count = bulkreq.icount) <= 0)
776 if (bulkreq.ubuffer == NULL)
779 if (cmd == XFS_IOC_FSINUMBERS)
780 error = xfs_inumbers(mp, &inlast, &count,
781 bulkreq.ubuffer, xfs_inumbers_fmt);
782 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
783 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
784 sizeof(xfs_bstat_t), NULL, &done);
785 else /* XFS_IOC_FSBULKSTAT */
786 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
787 sizeof(xfs_bstat_t), bulkreq.ubuffer,
793 if (bulkreq.ocount != NULL) {
794 if (copy_to_user(bulkreq.lastip, &inlast,
798 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
806 xfs_ioc_fsgeometry_v1(
810 xfs_fsop_geom_t fsgeo;
813 error = xfs_fs_geometry(&mp->m_sb, &fsgeo, 3);
818 * Caller should have passed an argument of type
819 * xfs_fsop_geom_v1_t. This is a proper subset of the
820 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
822 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
832 xfs_fsop_geom_t fsgeo;
835 error = xfs_fs_geometry(&mp->m_sb, &fsgeo, 4);
839 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
845 * Linux extended inode flags interface.
849 xfs_merge_ioc_xflags(
853 unsigned int xflags = start;
855 if (flags & FS_IMMUTABLE_FL)
856 xflags |= FS_XFLAG_IMMUTABLE;
858 xflags &= ~FS_XFLAG_IMMUTABLE;
859 if (flags & FS_APPEND_FL)
860 xflags |= FS_XFLAG_APPEND;
862 xflags &= ~FS_XFLAG_APPEND;
863 if (flags & FS_SYNC_FL)
864 xflags |= FS_XFLAG_SYNC;
866 xflags &= ~FS_XFLAG_SYNC;
867 if (flags & FS_NOATIME_FL)
868 xflags |= FS_XFLAG_NOATIME;
870 xflags &= ~FS_XFLAG_NOATIME;
871 if (flags & FS_NODUMP_FL)
872 xflags |= FS_XFLAG_NODUMP;
874 xflags &= ~FS_XFLAG_NODUMP;
883 unsigned int flags = 0;
885 if (di_flags & XFS_DIFLAG_IMMUTABLE)
886 flags |= FS_IMMUTABLE_FL;
887 if (di_flags & XFS_DIFLAG_APPEND)
888 flags |= FS_APPEND_FL;
889 if (di_flags & XFS_DIFLAG_SYNC)
891 if (di_flags & XFS_DIFLAG_NOATIME)
892 flags |= FS_NOATIME_FL;
893 if (di_flags & XFS_DIFLAG_NODUMP)
894 flags |= FS_NODUMP_FL;
906 memset(&fa, 0, sizeof(struct fsxattr));
908 xfs_ilock(ip, XFS_ILOCK_SHARED);
909 fa.fsx_xflags = xfs_ip2xflags(ip);
910 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
911 fa.fsx_cowextsize = ip->i_d.di_cowextsize <<
912 ip->i_mount->m_sb.sb_blocklog;
913 fa.fsx_projid = xfs_get_projid(ip);
917 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
918 fa.fsx_nextents = xfs_iext_count(ip->i_afp);
920 fa.fsx_nextents = ip->i_d.di_anextents;
924 if (ip->i_df.if_flags & XFS_IFEXTENTS)
925 fa.fsx_nextents = xfs_iext_count(&ip->i_df);
927 fa.fsx_nextents = ip->i_d.di_nextents;
929 xfs_iunlock(ip, XFS_ILOCK_SHARED);
931 if (copy_to_user(arg, &fa, sizeof(fa)))
938 struct xfs_inode *ip,
941 /* can't set PREALLOC this way, just preserve it */
943 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
945 if (xflags & FS_XFLAG_IMMUTABLE)
946 di_flags |= XFS_DIFLAG_IMMUTABLE;
947 if (xflags & FS_XFLAG_APPEND)
948 di_flags |= XFS_DIFLAG_APPEND;
949 if (xflags & FS_XFLAG_SYNC)
950 di_flags |= XFS_DIFLAG_SYNC;
951 if (xflags & FS_XFLAG_NOATIME)
952 di_flags |= XFS_DIFLAG_NOATIME;
953 if (xflags & FS_XFLAG_NODUMP)
954 di_flags |= XFS_DIFLAG_NODUMP;
955 if (xflags & FS_XFLAG_NODEFRAG)
956 di_flags |= XFS_DIFLAG_NODEFRAG;
957 if (xflags & FS_XFLAG_FILESTREAM)
958 di_flags |= XFS_DIFLAG_FILESTREAM;
959 if (S_ISDIR(VFS_I(ip)->i_mode)) {
960 if (xflags & FS_XFLAG_RTINHERIT)
961 di_flags |= XFS_DIFLAG_RTINHERIT;
962 if (xflags & FS_XFLAG_NOSYMLINKS)
963 di_flags |= XFS_DIFLAG_NOSYMLINKS;
964 if (xflags & FS_XFLAG_EXTSZINHERIT)
965 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
966 if (xflags & FS_XFLAG_PROJINHERIT)
967 di_flags |= XFS_DIFLAG_PROJINHERIT;
968 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
969 if (xflags & FS_XFLAG_REALTIME)
970 di_flags |= XFS_DIFLAG_REALTIME;
971 if (xflags & FS_XFLAG_EXTSIZE)
972 di_flags |= XFS_DIFLAG_EXTSIZE;
980 struct xfs_inode *ip,
984 (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
986 if (xflags & FS_XFLAG_DAX)
987 di_flags2 |= XFS_DIFLAG2_DAX;
988 if (xflags & FS_XFLAG_COWEXTSIZE)
989 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
995 xfs_diflags_to_linux(
996 struct xfs_inode *ip)
998 struct inode *inode = VFS_I(ip);
999 unsigned int xflags = xfs_ip2xflags(ip);
1001 if (xflags & FS_XFLAG_IMMUTABLE)
1002 inode->i_flags |= S_IMMUTABLE;
1004 inode->i_flags &= ~S_IMMUTABLE;
1005 if (xflags & FS_XFLAG_APPEND)
1006 inode->i_flags |= S_APPEND;
1008 inode->i_flags &= ~S_APPEND;
1009 if (xflags & FS_XFLAG_SYNC)
1010 inode->i_flags |= S_SYNC;
1012 inode->i_flags &= ~S_SYNC;
1013 if (xflags & FS_XFLAG_NOATIME)
1014 inode->i_flags |= S_NOATIME;
1016 inode->i_flags &= ~S_NOATIME;
1017 #if 0 /* disabled until the flag switching races are sorted out */
1018 if (xflags & FS_XFLAG_DAX)
1019 inode->i_flags |= S_DAX;
1021 inode->i_flags &= ~S_DAX;
1026 xfs_ioctl_setattr_xflags(
1027 struct xfs_trans *tp,
1028 struct xfs_inode *ip,
1031 struct xfs_mount *mp = ip->i_mount;
1034 /* Can't change realtime flag if any extents are allocated. */
1035 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1036 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1039 /* If realtime flag is set then must have realtime device */
1040 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1041 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1042 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1046 /* Clear reflink if we are actually able to set the rt flag. */
1047 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1048 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
1050 /* Don't allow us to set DAX mode for a reflinked file for now. */
1051 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
1055 * Can't modify an immutable/append-only file unless
1056 * we have appropriate permission.
1058 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1059 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
1060 !capable(CAP_LINUX_IMMUTABLE))
1063 /* diflags2 only valid for v3 inodes. */
1064 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1065 if (di_flags2 && ip->i_d.di_version < 3)
1068 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags);
1069 ip->i_d.di_flags2 = di_flags2;
1071 xfs_diflags_to_linux(ip);
1072 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1073 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1074 XFS_STATS_INC(mp, xs_ig_attrchg);
1079 * If we are changing DAX flags, we have to ensure the file is clean and any
1080 * cached objects in the address space are invalidated and removed. This
1081 * requires us to lock out other IO and page faults similar to a truncate
1082 * operation. The locks need to be held until the transaction has been committed
1083 * so that the cache invalidation is atomic with respect to the DAX flag
1087 xfs_ioctl_setattr_dax_invalidate(
1088 struct xfs_inode *ip,
1092 struct inode *inode = VFS_I(ip);
1093 struct super_block *sb = inode->i_sb;
1099 * It is only valid to set the DAX flag on regular files and
1100 * directories on filesystems where the block size is equal to the page
1101 * size. On directories it serves as an inherit hint.
1103 if (fa->fsx_xflags & FS_XFLAG_DAX) {
1104 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
1106 if (bdev_dax_supported(sb, sb->s_blocksize) < 0)
1110 /* If the DAX state is not changing, we have nothing to do here. */
1111 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1113 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1116 /* lock, flush and invalidate mapping in preparation for flag change */
1117 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1118 error = filemap_write_and_wait(inode->i_mapping);
1121 error = invalidate_inode_pages2(inode->i_mapping);
1125 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1129 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1135 * Set up the transaction structure for the setattr operation, checking that we
1136 * have permission to do so. On success, return a clean transaction and the
1137 * inode locked exclusively ready for further operation specific checks. On
1138 * failure, return an error without modifying or locking the inode.
1140 * The inode might already be IO locked on call. If this is the case, it is
1141 * indicated in @join_flags and we take full responsibility for ensuring they
1142 * are unlocked from now on. Hence if we have an error here, we still have to
1143 * unlock them. Otherwise, once they are joined to the transaction, they will
1144 * be unlocked on commit/cancel.
1146 static struct xfs_trans *
1147 xfs_ioctl_setattr_get_trans(
1148 struct xfs_inode *ip,
1151 struct xfs_mount *mp = ip->i_mount;
1152 struct xfs_trans *tp;
1155 if (mp->m_flags & XFS_MOUNT_RDONLY)
1158 if (XFS_FORCED_SHUTDOWN(mp))
1161 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1163 return ERR_PTR(error);
1165 xfs_ilock(ip, XFS_ILOCK_EXCL);
1166 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1170 * CAP_FOWNER overrides the following restrictions:
1172 * The user ID of the calling process must be equal to the file owner
1173 * ID, except in cases where the CAP_FSETID capability is applicable.
1175 if (!inode_owner_or_capable(VFS_I(ip))) {
1180 if (mp->m_flags & XFS_MOUNT_WSYNC)
1181 xfs_trans_set_sync(tp);
1186 xfs_trans_cancel(tp);
1189 xfs_iunlock(ip, join_flags);
1190 return ERR_PTR(error);
1194 * extent size hint validation is somewhat cumbersome. Rules are:
1196 * 1. extent size hint is only valid for directories and regular files
1197 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1198 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1199 * 4. can only be changed on regular files if no extents are allocated
1200 * 5. can be changed on directories at any time
1201 * 6. extsize hint of 0 turns off hints, clears inode flags.
1202 * 7. Extent size must be a multiple of the appropriate block size.
1203 * 8. for non-realtime files, the extent size hint must be limited
1204 * to half the AG size to avoid alignment extending the extent beyond the
1207 * Please keep this function in sync with xfs_scrub_inode_extsize.
1210 xfs_ioctl_setattr_check_extsize(
1211 struct xfs_inode *ip,
1214 struct xfs_mount *mp = ip->i_mount;
1216 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
1219 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
1220 !S_ISDIR(VFS_I(ip)->i_mode))
1223 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1224 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1227 if (fa->fsx_extsize != 0) {
1229 xfs_fsblock_t extsize_fsb;
1231 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1232 if (extsize_fsb > MAXEXTLEN)
1235 if (XFS_IS_REALTIME_INODE(ip) ||
1236 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1237 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1239 size = mp->m_sb.sb_blocksize;
1240 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1244 if (fa->fsx_extsize % size)
1247 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
1253 * CoW extent size hint validation rules are:
1255 * 1. CoW extent size hint can only be set if reflink is enabled on the fs.
1256 * The inode does not have to have any shared blocks, but it must be a v3.
1257 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
1258 * for a directory, the hint is propagated to new files.
1259 * 3. Can be changed on files & directories at any time.
1260 * 4. CoW extsize hint of 0 turns off hints, clears inode flags.
1261 * 5. Extent size must be a multiple of the appropriate block size.
1262 * 6. The extent size hint must be limited to half the AG size to avoid
1263 * alignment extending the extent beyond the limits of the AG.
1265 * Please keep this function in sync with xfs_scrub_inode_cowextsize.
1268 xfs_ioctl_setattr_check_cowextsize(
1269 struct xfs_inode *ip,
1272 struct xfs_mount *mp = ip->i_mount;
1274 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
1277 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) ||
1278 ip->i_d.di_version != 3)
1281 if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode))
1284 if (fa->fsx_cowextsize != 0) {
1286 xfs_fsblock_t cowextsize_fsb;
1288 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1289 if (cowextsize_fsb > MAXEXTLEN)
1292 size = mp->m_sb.sb_blocksize;
1293 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
1296 if (fa->fsx_cowextsize % size)
1299 fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;
1305 xfs_ioctl_setattr_check_projid(
1306 struct xfs_inode *ip,
1309 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1310 if (fa->fsx_projid > (uint16_t)-1 &&
1311 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1315 * Project Quota ID state is only allowed to change from within the init
1316 * namespace. Enforce that restriction only if we are trying to change
1317 * the quota ID state. Everything else is allowed in user namespaces.
1319 if (current_user_ns() == &init_user_ns)
1322 if (xfs_get_projid(ip) != fa->fsx_projid)
1324 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
1325 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1336 struct xfs_mount *mp = ip->i_mount;
1337 struct xfs_trans *tp;
1338 struct xfs_dquot *udqp = NULL;
1339 struct xfs_dquot *pdqp = NULL;
1340 struct xfs_dquot *olddquot = NULL;
1344 trace_xfs_ioctl_setattr(ip);
1346 code = xfs_ioctl_setattr_check_projid(ip, fa);
1351 * If disk quotas is on, we make sure that the dquots do exist on disk,
1352 * before we start any other transactions. Trying to do this later
1353 * is messy. We don't care to take a readlock to look at the ids
1354 * in inode here, because we can't hold it across the trans_reserve.
1355 * If the IDs do change before we take the ilock, we're covered
1356 * because the i_*dquot fields will get updated anyway.
1358 if (XFS_IS_QUOTA_ON(mp)) {
1359 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1360 ip->i_d.di_gid, fa->fsx_projid,
1361 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1367 * Changing DAX config may require inode locking for mapping
1368 * invalidation. These need to be held all the way to transaction commit
1369 * or cancel time, so need to be passed through to
1370 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1373 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1375 goto error_free_dquots;
1377 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1380 goto error_free_dquots;
1384 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1385 xfs_get_projid(ip) != fa->fsx_projid) {
1386 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1387 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1388 if (code) /* out of quota */
1389 goto error_trans_cancel;
1392 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1394 goto error_trans_cancel;
1396 code = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1398 goto error_trans_cancel;
1400 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1402 goto error_trans_cancel;
1405 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1406 * overrides the following restrictions:
1408 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1409 * successful return from chown()
1412 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1413 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1414 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1416 /* Change the ownerships and register project quota modifications */
1417 if (xfs_get_projid(ip) != fa->fsx_projid) {
1418 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1419 olddquot = xfs_qm_vop_chown(tp, ip,
1420 &ip->i_pdquot, pdqp);
1422 ASSERT(ip->i_d.di_version > 1);
1423 xfs_set_projid(ip, fa->fsx_projid);
1427 * Only set the extent size hint if we've already determined that the
1428 * extent size hint should be set on the inode. If no extent size flags
1429 * are set on the inode then unconditionally clear the extent size hint.
1431 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1432 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1434 ip->i_d.di_extsize = 0;
1435 if (ip->i_d.di_version == 3 &&
1436 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
1437 ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
1438 mp->m_sb.sb_blocklog;
1440 ip->i_d.di_cowextsize = 0;
1442 code = xfs_trans_commit(tp);
1445 * Release any dquot(s) the inode had kept before chown.
1447 xfs_qm_dqrele(olddquot);
1448 xfs_qm_dqrele(udqp);
1449 xfs_qm_dqrele(pdqp);
1454 xfs_trans_cancel(tp);
1456 xfs_qm_dqrele(udqp);
1457 xfs_qm_dqrele(pdqp);
1470 if (copy_from_user(&fa, arg, sizeof(fa)))
1473 error = mnt_want_write_file(filp);
1476 error = xfs_ioctl_setattr(ip, &fa);
1477 mnt_drop_write_file(filp);
1488 flags = xfs_di2lxflags(ip->i_d.di_flags);
1489 if (copy_to_user(arg, &flags, sizeof(flags)))
1496 struct xfs_inode *ip,
1500 struct xfs_trans *tp;
1506 if (copy_from_user(&flags, arg, sizeof(flags)))
1509 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1510 FS_NOATIME_FL | FS_NODUMP_FL | \
1514 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1516 error = mnt_want_write_file(filp);
1521 * Changing DAX config may require inode locking for mapping
1522 * invalidation. These need to be held all the way to transaction commit
1523 * or cancel time, so need to be passed through to
1524 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1527 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1529 goto out_drop_write;
1531 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1533 error = PTR_ERR(tp);
1534 goto out_drop_write;
1537 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1539 xfs_trans_cancel(tp);
1540 goto out_drop_write;
1543 error = xfs_trans_commit(tp);
1545 mnt_drop_write_file(filp);
1552 struct getbmapx __user *u,
1555 if (put_user(p->bmv_offset, &u->bmv_offset) ||
1556 put_user(p->bmv_block, &u->bmv_block) ||
1557 put_user(p->bmv_length, &u->bmv_length) ||
1558 put_user(0, &u->bmv_count) ||
1559 put_user(0, &u->bmv_entries))
1561 if (recsize < sizeof(struct getbmapx))
1563 if (put_user(0, &u->bmv_iflags) ||
1564 put_user(p->bmv_oflags, &u->bmv_oflags) ||
1565 put_user(0, &u->bmv_unused1) ||
1566 put_user(0, &u->bmv_unused2))
1577 struct getbmapx bmx = { 0 };
1578 struct kgetbmap *buf;
1583 case XFS_IOC_GETBMAPA:
1584 bmx.bmv_iflags = BMV_IF_ATTRFORK;
1586 case XFS_IOC_GETBMAP:
1587 if (file->f_mode & FMODE_NOCMTIME)
1588 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1589 /* struct getbmap is a strict subset of struct getbmapx. */
1590 recsize = sizeof(struct getbmap);
1592 case XFS_IOC_GETBMAPX:
1593 recsize = sizeof(struct getbmapx);
1599 if (copy_from_user(&bmx, arg, recsize))
1602 if (bmx.bmv_count < 2)
1604 if (bmx.bmv_count > ULONG_MAX / recsize)
1607 buf = kmem_zalloc_large(bmx.bmv_count * sizeof(*buf), 0);
1611 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
1616 if (copy_to_user(arg, &bmx, recsize))
1620 for (i = 0; i < bmx.bmv_entries; i++) {
1621 if (!xfs_getbmap_format(buf + i, arg, recsize))
1632 struct getfsmap_info {
1633 struct xfs_mount *mp;
1634 struct fsmap_head __user *data;
1640 xfs_getfsmap_format(struct xfs_fsmap *xfm, void *priv)
1642 struct getfsmap_info *info = priv;
1645 trace_xfs_getfsmap_mapping(info->mp, xfm);
1647 info->last_flags = xfm->fmr_flags;
1648 xfs_fsmap_from_internal(&fm, xfm);
1649 if (copy_to_user(&info->data->fmh_recs[info->idx++], &fm,
1650 sizeof(struct fsmap)))
1658 struct xfs_inode *ip,
1659 struct fsmap_head __user *arg)
1661 struct getfsmap_info info = { NULL };
1662 struct xfs_fsmap_head xhead = {0};
1663 struct fsmap_head head;
1664 bool aborted = false;
1667 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1669 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1670 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1671 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1672 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1673 sizeof(head.fmh_keys[1].fmr_reserved)))
1676 xhead.fmh_iflags = head.fmh_iflags;
1677 xhead.fmh_count = head.fmh_count;
1678 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1679 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1681 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1682 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1684 info.mp = ip->i_mount;
1686 error = xfs_getfsmap(ip->i_mount, &xhead, xfs_getfsmap_format, &info);
1687 if (error == XFS_BTREE_QUERY_RANGE_ABORT) {
1693 /* If we didn't abort, set the "last" flag in the last fmx */
1694 if (!aborted && info.idx) {
1695 info.last_flags |= FMR_OF_LAST;
1696 if (copy_to_user(&info.data->fmh_recs[info.idx - 1].fmr_flags,
1697 &info.last_flags, sizeof(info.last_flags)))
1701 /* copy back header */
1702 head.fmh_entries = xhead.fmh_entries;
1703 head.fmh_oflags = xhead.fmh_oflags;
1704 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
1711 xfs_ioc_scrub_metadata(
1712 struct xfs_inode *ip,
1715 struct xfs_scrub_metadata scrub;
1718 if (!capable(CAP_SYS_ADMIN))
1721 if (copy_from_user(&scrub, arg, sizeof(scrub)))
1724 error = xfs_scrub_metadata(ip, &scrub);
1728 if (copy_to_user(arg, &scrub, sizeof(scrub)))
1738 xfs_inode_t *ip, *tip;
1742 /* Pull information for the target fd */
1743 f = fdget((int)sxp->sx_fdtarget);
1749 if (!(f.file->f_mode & FMODE_WRITE) ||
1750 !(f.file->f_mode & FMODE_READ) ||
1751 (f.file->f_flags & O_APPEND)) {
1756 tmp = fdget((int)sxp->sx_fdtmp);
1762 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1763 !(tmp.file->f_mode & FMODE_READ) ||
1764 (tmp.file->f_flags & O_APPEND)) {
1766 goto out_put_tmp_file;
1769 if (IS_SWAPFILE(file_inode(f.file)) ||
1770 IS_SWAPFILE(file_inode(tmp.file))) {
1772 goto out_put_tmp_file;
1776 * We need to ensure that the fds passed in point to XFS inodes
1777 * before we cast and access them as XFS structures as we have no
1778 * control over what the user passes us here.
1780 if (f.file->f_op != &xfs_file_operations ||
1781 tmp.file->f_op != &xfs_file_operations) {
1783 goto out_put_tmp_file;
1786 ip = XFS_I(file_inode(f.file));
1787 tip = XFS_I(file_inode(tmp.file));
1789 if (ip->i_mount != tip->i_mount) {
1791 goto out_put_tmp_file;
1794 if (ip->i_ino == tip->i_ino) {
1796 goto out_put_tmp_file;
1799 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1801 goto out_put_tmp_file;
1804 error = xfs_swap_extents(ip, tip, sxp);
1816 struct xfs_mount *mp,
1817 char __user *user_label)
1819 struct xfs_sb *sbp = &mp->m_sb;
1820 char label[XFSLABEL_MAX + 1];
1823 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
1825 spin_lock(&mp->m_sb_lock);
1826 strncpy(label, sbp->sb_fname, sizeof(sbp->sb_fname));
1827 spin_unlock(&mp->m_sb_lock);
1829 /* xfs on-disk label is 12 chars, be sure we send a null to user */
1830 label[XFSLABEL_MAX] = '\0';
1831 if (copy_to_user(user_label, label, sizeof(sbp->sb_fname)))
1839 struct xfs_mount *mp,
1840 char __user *newlabel)
1842 struct xfs_sb *sbp = &mp->m_sb;
1843 char label[XFSLABEL_MAX + 1];
1847 if (!capable(CAP_SYS_ADMIN))
1850 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
1851 * smaller, at 12 bytes. We copy one more to be sure we find the
1852 * (required) NULL character to test the incoming label length.
1853 * NB: The on disk label doesn't need to be null terminated.
1855 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
1857 len = strnlen(label, XFSLABEL_MAX + 1);
1858 if (len > sizeof(sbp->sb_fname))
1861 error = mnt_want_write_file(filp);
1865 spin_lock(&mp->m_sb_lock);
1866 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
1867 strncpy(sbp->sb_fname, label, sizeof(sbp->sb_fname));
1868 spin_unlock(&mp->m_sb_lock);
1871 * Now we do several things to satisfy userspace.
1872 * In addition to normal logging of the primary superblock, we also
1873 * immediately write these changes to sector zero for the primary, then
1874 * update all backup supers (as xfs_db does for a label change), then
1875 * invalidate the block device page cache. This is so that any prior
1876 * buffered reads from userspace (i.e. from blkid) are invalidated,
1877 * and userspace will see the newly-written label.
1879 error = xfs_sync_sb_buf(mp);
1883 * growfs also updates backup supers so lock against that.
1885 mutex_lock(&mp->m_growlock);
1886 error = xfs_update_secondary_sbs(mp);
1887 mutex_unlock(&mp->m_growlock);
1889 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
1892 mnt_drop_write_file(filp);
1897 * Note: some of the ioctl's return positive numbers as a
1898 * byte count indicating success, such as readlink_by_handle.
1899 * So we don't "sign flip" like most other routines. This means
1900 * true errors need to be returned as a negative value.
1908 struct inode *inode = file_inode(filp);
1909 struct xfs_inode *ip = XFS_I(inode);
1910 struct xfs_mount *mp = ip->i_mount;
1911 void __user *arg = (void __user *)p;
1914 trace_xfs_file_ioctl(ip);
1918 return xfs_ioc_trim(mp, arg);
1919 case FS_IOC_GETFSLABEL:
1920 return xfs_ioc_getlabel(mp, arg);
1921 case FS_IOC_SETFSLABEL:
1922 return xfs_ioc_setlabel(filp, mp, arg);
1923 case XFS_IOC_ALLOCSP:
1924 case XFS_IOC_FREESP:
1925 case XFS_IOC_RESVSP:
1926 case XFS_IOC_UNRESVSP:
1927 case XFS_IOC_ALLOCSP64:
1928 case XFS_IOC_FREESP64:
1929 case XFS_IOC_RESVSP64:
1930 case XFS_IOC_UNRESVSP64:
1931 case XFS_IOC_ZERO_RANGE: {
1934 if (copy_from_user(&bf, arg, sizeof(bf)))
1936 return xfs_ioc_space(filp, cmd, &bf);
1938 case XFS_IOC_DIOINFO: {
1940 xfs_buftarg_t *target =
1941 XFS_IS_REALTIME_INODE(ip) ?
1942 mp->m_rtdev_targp : mp->m_ddev_targp;
1944 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1945 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1947 if (copy_to_user(arg, &da, sizeof(da)))
1952 case XFS_IOC_FSBULKSTAT_SINGLE:
1953 case XFS_IOC_FSBULKSTAT:
1954 case XFS_IOC_FSINUMBERS:
1955 return xfs_ioc_bulkstat(mp, cmd, arg);
1957 case XFS_IOC_FSGEOMETRY_V1:
1958 return xfs_ioc_fsgeometry_v1(mp, arg);
1960 case XFS_IOC_FSGEOMETRY:
1961 return xfs_ioc_fsgeometry(mp, arg);
1963 case XFS_IOC_GETVERSION:
1964 return put_user(inode->i_generation, (int __user *)arg);
1966 case XFS_IOC_FSGETXATTR:
1967 return xfs_ioc_fsgetxattr(ip, 0, arg);
1968 case XFS_IOC_FSGETXATTRA:
1969 return xfs_ioc_fsgetxattr(ip, 1, arg);
1970 case XFS_IOC_FSSETXATTR:
1971 return xfs_ioc_fssetxattr(ip, filp, arg);
1972 case XFS_IOC_GETXFLAGS:
1973 return xfs_ioc_getxflags(ip, arg);
1974 case XFS_IOC_SETXFLAGS:
1975 return xfs_ioc_setxflags(ip, filp, arg);
1977 case XFS_IOC_FSSETDM: {
1978 struct fsdmidata dmi;
1980 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1983 error = mnt_want_write_file(filp);
1987 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1989 mnt_drop_write_file(filp);
1993 case XFS_IOC_GETBMAP:
1994 case XFS_IOC_GETBMAPA:
1995 case XFS_IOC_GETBMAPX:
1996 return xfs_ioc_getbmap(filp, cmd, arg);
1998 case FS_IOC_GETFSMAP:
1999 return xfs_ioc_getfsmap(ip, arg);
2001 case XFS_IOC_SCRUB_METADATA:
2002 return xfs_ioc_scrub_metadata(ip, arg);
2004 case XFS_IOC_FD_TO_HANDLE:
2005 case XFS_IOC_PATH_TO_HANDLE:
2006 case XFS_IOC_PATH_TO_FSHANDLE: {
2007 xfs_fsop_handlereq_t hreq;
2009 if (copy_from_user(&hreq, arg, sizeof(hreq)))
2011 return xfs_find_handle(cmd, &hreq);
2013 case XFS_IOC_OPEN_BY_HANDLE: {
2014 xfs_fsop_handlereq_t hreq;
2016 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2018 return xfs_open_by_handle(filp, &hreq);
2020 case XFS_IOC_FSSETDM_BY_HANDLE:
2021 return xfs_fssetdm_by_handle(filp, arg);
2023 case XFS_IOC_READLINK_BY_HANDLE: {
2024 xfs_fsop_handlereq_t hreq;
2026 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2028 return xfs_readlink_by_handle(filp, &hreq);
2030 case XFS_IOC_ATTRLIST_BY_HANDLE:
2031 return xfs_attrlist_by_handle(filp, arg);
2033 case XFS_IOC_ATTRMULTI_BY_HANDLE:
2034 return xfs_attrmulti_by_handle(filp, arg);
2036 case XFS_IOC_SWAPEXT: {
2037 struct xfs_swapext sxp;
2039 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
2041 error = mnt_want_write_file(filp);
2044 error = xfs_ioc_swapext(&sxp);
2045 mnt_drop_write_file(filp);
2049 case XFS_IOC_FSCOUNTS: {
2050 xfs_fsop_counts_t out;
2052 error = xfs_fs_counts(mp, &out);
2056 if (copy_to_user(arg, &out, sizeof(out)))
2061 case XFS_IOC_SET_RESBLKS: {
2062 xfs_fsop_resblks_t inout;
2065 if (!capable(CAP_SYS_ADMIN))
2068 if (mp->m_flags & XFS_MOUNT_RDONLY)
2071 if (copy_from_user(&inout, arg, sizeof(inout)))
2074 error = mnt_want_write_file(filp);
2078 /* input parameter is passed in resblks field of structure */
2080 error = xfs_reserve_blocks(mp, &in, &inout);
2081 mnt_drop_write_file(filp);
2085 if (copy_to_user(arg, &inout, sizeof(inout)))
2090 case XFS_IOC_GET_RESBLKS: {
2091 xfs_fsop_resblks_t out;
2093 if (!capable(CAP_SYS_ADMIN))
2096 error = xfs_reserve_blocks(mp, NULL, &out);
2100 if (copy_to_user(arg, &out, sizeof(out)))
2106 case XFS_IOC_FSGROWFSDATA: {
2107 xfs_growfs_data_t in;
2109 if (copy_from_user(&in, arg, sizeof(in)))
2112 error = mnt_want_write_file(filp);
2115 error = xfs_growfs_data(mp, &in);
2116 mnt_drop_write_file(filp);
2120 case XFS_IOC_FSGROWFSLOG: {
2121 xfs_growfs_log_t in;
2123 if (copy_from_user(&in, arg, sizeof(in)))
2126 error = mnt_want_write_file(filp);
2129 error = xfs_growfs_log(mp, &in);
2130 mnt_drop_write_file(filp);
2134 case XFS_IOC_FSGROWFSRT: {
2137 if (copy_from_user(&in, arg, sizeof(in)))
2140 error = mnt_want_write_file(filp);
2143 error = xfs_growfs_rt(mp, &in);
2144 mnt_drop_write_file(filp);
2148 case XFS_IOC_GOINGDOWN: {
2151 if (!capable(CAP_SYS_ADMIN))
2154 if (get_user(in, (uint32_t __user *)arg))
2157 return xfs_fs_goingdown(mp, in);
2160 case XFS_IOC_ERROR_INJECTION: {
2161 xfs_error_injection_t in;
2163 if (!capable(CAP_SYS_ADMIN))
2166 if (copy_from_user(&in, arg, sizeof(in)))
2169 return xfs_errortag_add(mp, in.errtag);
2172 case XFS_IOC_ERROR_CLEARALL:
2173 if (!capable(CAP_SYS_ADMIN))
2176 return xfs_errortag_clearall(mp);
2178 case XFS_IOC_FREE_EOFBLOCKS: {
2179 struct xfs_fs_eofblocks eofb;
2180 struct xfs_eofblocks keofb;
2182 if (!capable(CAP_SYS_ADMIN))
2185 if (mp->m_flags & XFS_MOUNT_RDONLY)
2188 if (copy_from_user(&eofb, arg, sizeof(eofb)))
2191 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
2195 return xfs_icache_free_eofblocks(mp, &keofb);