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
21 #include "xfs_trans.h"
24 #include "xfs_alloc.h"
25 #include "xfs_mount.h"
26 #include "xfs_bmap_btree.h"
27 #include "xfs_dinode.h"
28 #include "xfs_inode.h"
29 #include "xfs_ioctl.h"
30 #include "xfs_rtalloc.h"
31 #include "xfs_itable.h"
32 #include "xfs_error.h"
35 #include "xfs_buf_item.h"
36 #include "xfs_utils.h"
37 #include "xfs_dfrag.h"
38 #include "xfs_fsops.h"
39 #include "xfs_vnodeops.h"
40 #include "xfs_discard.h"
41 #include "xfs_quota.h"
42 #include "xfs_inode_item.h"
43 #include "xfs_export.h"
44 #include "xfs_trace.h"
45 #include "xfs_icache.h"
47 #include <linux/capability.h>
48 #include <linux/dcache.h>
49 #include <linux/mount.h>
50 #include <linux/namei.h>
51 #include <linux/pagemap.h>
52 #include <linux/slab.h>
53 #include <linux/exportfs.h>
56 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
57 * a file or fs handle.
59 * XFS_IOC_PATH_TO_FSHANDLE
60 * returns fs handle for a mount point or path within that mount point
61 * XFS_IOC_FD_TO_HANDLE
62 * returns full handle for a FD opened in user space
63 * XFS_IOC_PATH_TO_HANDLE
64 * returns full handle for a path
69 xfs_fsop_handlereq_t *hreq)
79 if (cmd == XFS_IOC_FD_TO_HANDLE) {
83 inode = file_inode(f.file);
85 error = user_lpath((const char __user *)hreq->path, &path);
88 inode = path.dentry->d_inode;
93 * We can only generate handles for inodes residing on a XFS filesystem,
94 * and only for regular files, directories or symbolic links.
97 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
101 if (!S_ISREG(inode->i_mode) &&
102 !S_ISDIR(inode->i_mode) &&
103 !S_ISLNK(inode->i_mode))
107 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
109 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
111 * This handle only contains an fsid, zero the rest.
113 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
114 hsize = sizeof(xfs_fsid_t);
118 lock_mode = xfs_ilock_map_shared(ip);
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 = ip->i_d.di_gen;
123 handle.ha_fid.fid_ino = ip->i_ino;
124 xfs_iunlock_map_shared(ip, lock_mode);
126 hsize = XFS_HSIZE(handle);
130 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
131 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
137 if (cmd == XFS_IOC_FD_TO_HANDLE)
145 * No need to do permission checks on the various pathname components
146 * as the handle operations are privileged.
149 xfs_handle_acceptable(
151 struct dentry *dentry)
157 * Convert userspace handle data into a dentry.
160 xfs_handle_to_dentry(
161 struct file *parfilp,
162 void __user *uhandle,
166 struct xfs_fid64 fid;
169 * Only allow handle opens under a directory.
171 if (!S_ISDIR(file_inode(parfilp)->i_mode))
172 return ERR_PTR(-ENOTDIR);
174 if (hlen != sizeof(xfs_handle_t))
175 return ERR_PTR(-EINVAL);
176 if (copy_from_user(&handle, uhandle, hlen))
177 return ERR_PTR(-EFAULT);
178 if (handle.ha_fid.fid_len !=
179 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
180 return ERR_PTR(-EINVAL);
182 memset(&fid, 0, sizeof(struct fid));
183 fid.ino = handle.ha_fid.fid_ino;
184 fid.gen = handle.ha_fid.fid_gen;
186 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
187 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
188 xfs_handle_acceptable, NULL);
191 STATIC struct dentry *
192 xfs_handlereq_to_dentry(
193 struct file *parfilp,
194 xfs_fsop_handlereq_t *hreq)
196 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
201 struct file *parfilp,
202 xfs_fsop_handlereq_t *hreq)
204 const struct cred *cred = current_cred();
210 struct dentry *dentry;
214 if (!capable(CAP_SYS_ADMIN))
215 return -XFS_ERROR(EPERM);
217 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
219 return PTR_ERR(dentry);
220 inode = dentry->d_inode;
222 /* Restrict xfs_open_by_handle to directories & regular files. */
223 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
224 error = -XFS_ERROR(EPERM);
228 #if BITS_PER_LONG != 32
229 hreq->oflags |= O_LARGEFILE;
232 permflag = hreq->oflags;
233 fmode = OPEN_FMODE(permflag);
234 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
235 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
236 error = -XFS_ERROR(EPERM);
240 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
241 error = -XFS_ERROR(EACCES);
245 /* Can't write directories. */
246 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
247 error = -XFS_ERROR(EISDIR);
251 fd = get_unused_fd();
257 path.mnt = parfilp->f_path.mnt;
258 path.dentry = dentry;
259 filp = dentry_open(&path, hreq->oflags, cred);
263 return PTR_ERR(filp);
266 if (S_ISREG(inode->i_mode)) {
267 filp->f_flags |= O_NOATIME;
268 filp->f_mode |= FMODE_NOCMTIME;
271 fd_install(fd, filp);
280 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
281 * unused first argument.
296 if (len > (unsigned) buflen)
298 if (copy_to_user(buffer, link, len))
306 xfs_readlink_by_handle(
307 struct file *parfilp,
308 xfs_fsop_handlereq_t *hreq)
310 struct dentry *dentry;
315 if (!capable(CAP_SYS_ADMIN))
316 return -XFS_ERROR(EPERM);
318 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
320 return PTR_ERR(dentry);
322 /* Restrict this handle operation to symlinks only. */
323 if (!S_ISLNK(dentry->d_inode->i_mode)) {
324 error = -XFS_ERROR(EINVAL);
328 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
329 error = -XFS_ERROR(EFAULT);
333 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
335 error = -XFS_ERROR(ENOMEM);
339 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
342 error = do_readlink(hreq->ohandle, olen, link);
354 xfs_fssetdm_by_handle(
355 struct file *parfilp,
359 struct fsdmidata fsd;
360 xfs_fsop_setdm_handlereq_t dmhreq;
361 struct dentry *dentry;
363 if (!capable(CAP_MKNOD))
364 return -XFS_ERROR(EPERM);
365 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
366 return -XFS_ERROR(EFAULT);
368 error = mnt_want_write_file(parfilp);
372 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
373 if (IS_ERR(dentry)) {
374 mnt_drop_write_file(parfilp);
375 return PTR_ERR(dentry);
378 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
379 error = -XFS_ERROR(EPERM);
383 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
384 error = -XFS_ERROR(EFAULT);
388 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
392 mnt_drop_write_file(parfilp);
398 xfs_attrlist_by_handle(
399 struct file *parfilp,
403 attrlist_cursor_kern_t *cursor;
404 xfs_fsop_attrlist_handlereq_t al_hreq;
405 struct dentry *dentry;
408 if (!capable(CAP_SYS_ADMIN))
409 return -XFS_ERROR(EPERM);
410 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
411 return -XFS_ERROR(EFAULT);
412 if (al_hreq.buflen > XATTR_LIST_MAX)
413 return -XFS_ERROR(EINVAL);
416 * Reject flags, only allow namespaces.
418 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
419 return -XFS_ERROR(EINVAL);
421 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
423 return PTR_ERR(dentry);
425 kbuf = kmem_zalloc(al_hreq.buflen, KM_SLEEP | KM_MAYFAIL);
427 kbuf = kmem_zalloc_large(al_hreq.buflen);
432 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
433 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
434 al_hreq.flags, cursor);
438 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
442 if (is_vmalloc_addr(kbuf))
443 kmem_free_large(kbuf);
452 xfs_attrmulti_attr_get(
455 unsigned char __user *ubuf,
462 if (*len > XATTR_SIZE_MAX)
464 kbuf = kmem_zalloc(*len, KM_SLEEP | KM_MAYFAIL);
466 kbuf = kmem_zalloc_large(*len);
471 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
475 if (copy_to_user(ubuf, kbuf, *len))
479 if (is_vmalloc_addr(kbuf))
480 kmem_free_large(kbuf);
487 xfs_attrmulti_attr_set(
490 const unsigned char __user *ubuf,
497 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
499 if (len > XATTR_SIZE_MAX)
502 kbuf = memdup_user(ubuf, len);
504 return PTR_ERR(kbuf);
506 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
512 xfs_attrmulti_attr_remove(
517 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
519 return xfs_attr_remove(XFS_I(inode), name, flags);
523 xfs_attrmulti_by_handle(
524 struct file *parfilp,
528 xfs_attr_multiop_t *ops;
529 xfs_fsop_attrmulti_handlereq_t am_hreq;
530 struct dentry *dentry;
531 unsigned int i, size;
532 unsigned char *attr_name;
534 if (!capable(CAP_SYS_ADMIN))
535 return -XFS_ERROR(EPERM);
536 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
537 return -XFS_ERROR(EFAULT);
540 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
543 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
545 return PTR_ERR(dentry);
548 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
549 if (!size || size > 16 * PAGE_SIZE)
552 ops = memdup_user(am_hreq.ops, size);
554 error = PTR_ERR(ops);
558 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
563 for (i = 0; i < am_hreq.opcount; i++) {
564 ops[i].am_error = strncpy_from_user((char *)attr_name,
565 ops[i].am_attrname, MAXNAMELEN);
566 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
568 if (ops[i].am_error < 0)
571 switch (ops[i].am_opcode) {
573 ops[i].am_error = xfs_attrmulti_attr_get(
574 dentry->d_inode, attr_name,
575 ops[i].am_attrvalue, &ops[i].am_length,
579 ops[i].am_error = mnt_want_write_file(parfilp);
582 ops[i].am_error = xfs_attrmulti_attr_set(
583 dentry->d_inode, attr_name,
584 ops[i].am_attrvalue, ops[i].am_length,
586 mnt_drop_write_file(parfilp);
589 ops[i].am_error = mnt_want_write_file(parfilp);
592 ops[i].am_error = xfs_attrmulti_attr_remove(
593 dentry->d_inode, attr_name,
595 mnt_drop_write_file(parfilp);
598 ops[i].am_error = EINVAL;
602 if (copy_to_user(am_hreq.ops, ops, size))
603 error = XFS_ERROR(EFAULT);
615 struct xfs_inode *ip,
626 * Only allow the sys admin to reserve space unless
627 * unwritten extents are enabled.
629 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
630 !capable(CAP_SYS_ADMIN))
631 return -XFS_ERROR(EPERM);
633 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
634 return -XFS_ERROR(EPERM);
636 if (!(filp->f_mode & FMODE_WRITE))
637 return -XFS_ERROR(EBADF);
639 if (!S_ISREG(inode->i_mode))
640 return -XFS_ERROR(EINVAL);
642 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
643 attr_flags |= XFS_ATTR_NONBLOCK;
645 if (filp->f_flags & O_DSYNC)
646 attr_flags |= XFS_ATTR_SYNC;
648 if (ioflags & IO_INVIS)
649 attr_flags |= XFS_ATTR_DMI;
651 error = mnt_want_write_file(filp);
654 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
655 mnt_drop_write_file(filp);
665 xfs_fsop_bulkreq_t bulkreq;
666 int count; /* # of records returned */
667 xfs_ino_t inlast; /* last inode number */
671 /* done = 1 if there are more stats to get and if bulkstat */
672 /* should be called again (unused here, but used in dmapi) */
674 if (!capable(CAP_SYS_ADMIN))
677 if (XFS_FORCED_SHUTDOWN(mp))
678 return -XFS_ERROR(EIO);
680 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
681 return -XFS_ERROR(EFAULT);
683 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
684 return -XFS_ERROR(EFAULT);
686 if ((count = bulkreq.icount) <= 0)
687 return -XFS_ERROR(EINVAL);
689 if (bulkreq.ubuffer == NULL)
690 return -XFS_ERROR(EINVAL);
692 if (cmd == XFS_IOC_FSINUMBERS)
693 error = xfs_inumbers(mp, &inlast, &count,
694 bulkreq.ubuffer, xfs_inumbers_fmt);
695 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
696 error = xfs_bulkstat_single(mp, &inlast,
697 bulkreq.ubuffer, &done);
698 else /* XFS_IOC_FSBULKSTAT */
699 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
700 sizeof(xfs_bstat_t), bulkreq.ubuffer,
706 if (bulkreq.ocount != NULL) {
707 if (copy_to_user(bulkreq.lastip, &inlast,
709 return -XFS_ERROR(EFAULT);
711 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
712 return -XFS_ERROR(EFAULT);
719 xfs_ioc_fsgeometry_v1(
723 xfs_fsop_geom_t fsgeo;
726 error = xfs_fs_geometry(mp, &fsgeo, 3);
731 * Caller should have passed an argument of type
732 * xfs_fsop_geom_v1_t. This is a proper subset of the
733 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
735 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
736 return -XFS_ERROR(EFAULT);
745 xfs_fsop_geom_t fsgeo;
748 error = xfs_fs_geometry(mp, &fsgeo, 4);
752 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
753 return -XFS_ERROR(EFAULT);
758 * Linux extended inode flags interface.
762 xfs_merge_ioc_xflags(
766 unsigned int xflags = start;
768 if (flags & FS_IMMUTABLE_FL)
769 xflags |= XFS_XFLAG_IMMUTABLE;
771 xflags &= ~XFS_XFLAG_IMMUTABLE;
772 if (flags & FS_APPEND_FL)
773 xflags |= XFS_XFLAG_APPEND;
775 xflags &= ~XFS_XFLAG_APPEND;
776 if (flags & FS_SYNC_FL)
777 xflags |= XFS_XFLAG_SYNC;
779 xflags &= ~XFS_XFLAG_SYNC;
780 if (flags & FS_NOATIME_FL)
781 xflags |= XFS_XFLAG_NOATIME;
783 xflags &= ~XFS_XFLAG_NOATIME;
784 if (flags & FS_NODUMP_FL)
785 xflags |= XFS_XFLAG_NODUMP;
787 xflags &= ~XFS_XFLAG_NODUMP;
796 unsigned int flags = 0;
798 if (di_flags & XFS_DIFLAG_IMMUTABLE)
799 flags |= FS_IMMUTABLE_FL;
800 if (di_flags & XFS_DIFLAG_APPEND)
801 flags |= FS_APPEND_FL;
802 if (di_flags & XFS_DIFLAG_SYNC)
804 if (di_flags & XFS_DIFLAG_NOATIME)
805 flags |= FS_NOATIME_FL;
806 if (di_flags & XFS_DIFLAG_NODUMP)
807 flags |= FS_NODUMP_FL;
819 memset(&fa, 0, sizeof(struct fsxattr));
821 xfs_ilock(ip, XFS_ILOCK_SHARED);
822 fa.fsx_xflags = xfs_ip2xflags(ip);
823 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
824 fa.fsx_projid = xfs_get_projid(ip);
828 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
829 fa.fsx_nextents = ip->i_afp->if_bytes /
830 sizeof(xfs_bmbt_rec_t);
832 fa.fsx_nextents = ip->i_d.di_anextents;
836 if (ip->i_df.if_flags & XFS_IFEXTENTS)
837 fa.fsx_nextents = ip->i_df.if_bytes /
838 sizeof(xfs_bmbt_rec_t);
840 fa.fsx_nextents = ip->i_d.di_nextents;
842 xfs_iunlock(ip, XFS_ILOCK_SHARED);
844 if (copy_to_user(arg, &fa, sizeof(fa)))
851 struct xfs_inode *ip,
854 unsigned int di_flags;
856 /* can't set PREALLOC this way, just preserve it */
857 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
858 if (xflags & XFS_XFLAG_IMMUTABLE)
859 di_flags |= XFS_DIFLAG_IMMUTABLE;
860 if (xflags & XFS_XFLAG_APPEND)
861 di_flags |= XFS_DIFLAG_APPEND;
862 if (xflags & XFS_XFLAG_SYNC)
863 di_flags |= XFS_DIFLAG_SYNC;
864 if (xflags & XFS_XFLAG_NOATIME)
865 di_flags |= XFS_DIFLAG_NOATIME;
866 if (xflags & XFS_XFLAG_NODUMP)
867 di_flags |= XFS_DIFLAG_NODUMP;
868 if (xflags & XFS_XFLAG_PROJINHERIT)
869 di_flags |= XFS_DIFLAG_PROJINHERIT;
870 if (xflags & XFS_XFLAG_NODEFRAG)
871 di_flags |= XFS_DIFLAG_NODEFRAG;
872 if (xflags & XFS_XFLAG_FILESTREAM)
873 di_flags |= XFS_DIFLAG_FILESTREAM;
874 if (S_ISDIR(ip->i_d.di_mode)) {
875 if (xflags & XFS_XFLAG_RTINHERIT)
876 di_flags |= XFS_DIFLAG_RTINHERIT;
877 if (xflags & XFS_XFLAG_NOSYMLINKS)
878 di_flags |= XFS_DIFLAG_NOSYMLINKS;
879 if (xflags & XFS_XFLAG_EXTSZINHERIT)
880 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
881 } else if (S_ISREG(ip->i_d.di_mode)) {
882 if (xflags & XFS_XFLAG_REALTIME)
883 di_flags |= XFS_DIFLAG_REALTIME;
884 if (xflags & XFS_XFLAG_EXTSIZE)
885 di_flags |= XFS_DIFLAG_EXTSIZE;
888 ip->i_d.di_flags = di_flags;
892 xfs_diflags_to_linux(
893 struct xfs_inode *ip)
895 struct inode *inode = VFS_I(ip);
896 unsigned int xflags = xfs_ip2xflags(ip);
898 if (xflags & XFS_XFLAG_IMMUTABLE)
899 inode->i_flags |= S_IMMUTABLE;
901 inode->i_flags &= ~S_IMMUTABLE;
902 if (xflags & XFS_XFLAG_APPEND)
903 inode->i_flags |= S_APPEND;
905 inode->i_flags &= ~S_APPEND;
906 if (xflags & XFS_XFLAG_SYNC)
907 inode->i_flags |= S_SYNC;
909 inode->i_flags &= ~S_SYNC;
910 if (xflags & XFS_XFLAG_NOATIME)
911 inode->i_flags |= S_NOATIME;
913 inode->i_flags &= ~S_NOATIME;
917 #define FSX_EXTSIZE 2
919 #define FSX_NONBLOCK 8
927 struct xfs_mount *mp = ip->i_mount;
928 struct xfs_trans *tp;
929 unsigned int lock_flags = 0;
930 struct xfs_dquot *udqp = NULL;
931 struct xfs_dquot *gdqp = NULL;
932 struct xfs_dquot *olddquot = NULL;
935 trace_xfs_ioctl_setattr(ip);
937 if (mp->m_flags & XFS_MOUNT_RDONLY)
938 return XFS_ERROR(EROFS);
939 if (XFS_FORCED_SHUTDOWN(mp))
940 return XFS_ERROR(EIO);
943 * Disallow 32bit project ids when projid32bit feature is not enabled.
945 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
946 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
947 return XFS_ERROR(EINVAL);
950 * If disk quotas is on, we make sure that the dquots do exist on disk,
951 * before we start any other transactions. Trying to do this later
952 * is messy. We don't care to take a readlock to look at the ids
953 * in inode here, because we can't hold it across the trans_reserve.
954 * If the IDs do change before we take the ilock, we're covered
955 * because the i_*dquot fields will get updated anyway.
957 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
958 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
959 ip->i_d.di_gid, fa->fsx_projid,
960 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
966 * For the other attributes, we acquire the inode lock and
967 * first do an error checking pass.
969 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
970 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
974 lock_flags = XFS_ILOCK_EXCL;
975 xfs_ilock(ip, lock_flags);
978 * CAP_FOWNER overrides the following restrictions:
980 * The user ID of the calling process must be equal
981 * to the file owner ID, except in cases where the
982 * CAP_FSETID capability is applicable.
984 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
985 code = XFS_ERROR(EPERM);
990 * Do a quota reservation only if projid is actually going to change.
992 if (mask & FSX_PROJID) {
993 if (XFS_IS_QUOTA_RUNNING(mp) &&
994 XFS_IS_PQUOTA_ON(mp) &&
995 xfs_get_projid(ip) != fa->fsx_projid) {
997 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
998 capable(CAP_FOWNER) ?
999 XFS_QMOPT_FORCE_RES : 0);
1000 if (code) /* out of quota */
1005 if (mask & FSX_EXTSIZE) {
1007 * Can't change extent size if any extents are allocated.
1009 if (ip->i_d.di_nextents &&
1010 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
1012 code = XFS_ERROR(EINVAL); /* EFBIG? */
1017 * Extent size must be a multiple of the appropriate block
1018 * size, if set at all. It must also be smaller than the
1019 * maximum extent size supported by the filesystem.
1021 * Also, for non-realtime files, limit the extent size hint to
1022 * half the size of the AGs in the filesystem so alignment
1023 * doesn't result in extents larger than an AG.
1025 if (fa->fsx_extsize != 0) {
1027 xfs_fsblock_t extsize_fsb;
1029 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1030 if (extsize_fsb > MAXEXTLEN) {
1031 code = XFS_ERROR(EINVAL);
1035 if (XFS_IS_REALTIME_INODE(ip) ||
1036 ((mask & FSX_XFLAGS) &&
1037 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1038 size = mp->m_sb.sb_rextsize <<
1039 mp->m_sb.sb_blocklog;
1041 size = mp->m_sb.sb_blocksize;
1042 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1043 code = XFS_ERROR(EINVAL);
1048 if (fa->fsx_extsize % size) {
1049 code = XFS_ERROR(EINVAL);
1056 if (mask & FSX_XFLAGS) {
1058 * Can't change realtime flag if any extents are allocated.
1060 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1061 (XFS_IS_REALTIME_INODE(ip)) !=
1062 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1063 code = XFS_ERROR(EINVAL); /* EFBIG? */
1068 * If realtime flag is set then must have realtime data.
1070 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1071 if ((mp->m_sb.sb_rblocks == 0) ||
1072 (mp->m_sb.sb_rextsize == 0) ||
1073 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1074 code = XFS_ERROR(EINVAL);
1080 * Can't modify an immutable/append-only file unless
1081 * we have appropriate permission.
1083 if ((ip->i_d.di_flags &
1084 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1086 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1087 !capable(CAP_LINUX_IMMUTABLE)) {
1088 code = XFS_ERROR(EPERM);
1093 xfs_trans_ijoin(tp, ip, 0);
1096 * Change file ownership. Must be the owner or privileged.
1098 if (mask & FSX_PROJID) {
1100 * CAP_FSETID overrides the following restrictions:
1102 * The set-user-ID and set-group-ID bits of a file will be
1103 * cleared upon successful return from chown()
1105 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1106 !capable(CAP_FSETID))
1107 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1110 * Change the ownerships and register quota modifications
1111 * in the transaction.
1113 if (xfs_get_projid(ip) != fa->fsx_projid) {
1114 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1115 olddquot = xfs_qm_vop_chown(tp, ip,
1116 &ip->i_gdquot, gdqp);
1118 xfs_set_projid(ip, fa->fsx_projid);
1121 * We may have to rev the inode as well as
1122 * the superblock version number since projids didn't
1123 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1125 if (ip->i_d.di_version == 1)
1126 xfs_bump_ino_vers2(tp, ip);
1131 if (mask & FSX_EXTSIZE)
1132 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1133 if (mask & FSX_XFLAGS) {
1134 xfs_set_diflags(ip, fa->fsx_xflags);
1135 xfs_diflags_to_linux(ip);
1138 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1139 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1141 XFS_STATS_INC(xs_ig_attrchg);
1144 * If this is a synchronous mount, make sure that the
1145 * transaction goes to disk before returning to the user.
1146 * This is slightly sub-optimal in that truncates require
1147 * two sync transactions instead of one for wsync filesystems.
1148 * One for the truncate and one for the timestamps since we
1149 * don't want to change the timestamps unless we're sure the
1150 * truncate worked. Truncates are less than 1% of the laddis
1151 * mix so this probably isn't worth the trouble to optimize.
1153 if (mp->m_flags & XFS_MOUNT_WSYNC)
1154 xfs_trans_set_sync(tp);
1155 code = xfs_trans_commit(tp, 0);
1156 xfs_iunlock(ip, lock_flags);
1159 * Release any dquot(s) the inode had kept before chown.
1161 xfs_qm_dqrele(olddquot);
1162 xfs_qm_dqrele(udqp);
1163 xfs_qm_dqrele(gdqp);
1168 xfs_qm_dqrele(udqp);
1169 xfs_qm_dqrele(gdqp);
1170 xfs_trans_cancel(tp, 0);
1172 xfs_iunlock(ip, lock_flags);
1186 if (copy_from_user(&fa, arg, sizeof(fa)))
1189 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1190 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1191 mask |= FSX_NONBLOCK;
1193 error = mnt_want_write_file(filp);
1196 error = xfs_ioctl_setattr(ip, &fa, mask);
1197 mnt_drop_write_file(filp);
1208 flags = xfs_di2lxflags(ip->i_d.di_flags);
1209 if (copy_to_user(arg, &flags, sizeof(flags)))
1225 if (copy_from_user(&flags, arg, sizeof(flags)))
1228 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1229 FS_NOATIME_FL | FS_NODUMP_FL | \
1234 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1235 mask |= FSX_NONBLOCK;
1236 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1238 error = mnt_want_write_file(filp);
1241 error = xfs_ioctl_setattr(ip, &fa, mask);
1242 mnt_drop_write_file(filp);
1247 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1249 struct getbmap __user *base = *ap;
1251 /* copy only getbmap portion (not getbmapx) */
1252 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1253 return XFS_ERROR(EFAULT);
1255 *ap += sizeof(struct getbmap);
1261 struct xfs_inode *ip,
1266 struct getbmapx bmx;
1269 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1270 return -XFS_ERROR(EFAULT);
1272 if (bmx.bmv_count < 2)
1273 return -XFS_ERROR(EINVAL);
1275 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1276 if (ioflags & IO_INVIS)
1277 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1279 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1280 (struct getbmap *)arg+1);
1284 /* copy back header - only size of getbmap */
1285 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1286 return -XFS_ERROR(EFAULT);
1291 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1293 struct getbmapx __user *base = *ap;
1295 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1296 return XFS_ERROR(EFAULT);
1298 *ap += sizeof(struct getbmapx);
1304 struct xfs_inode *ip,
1307 struct getbmapx bmx;
1310 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1311 return -XFS_ERROR(EFAULT);
1313 if (bmx.bmv_count < 2)
1314 return -XFS_ERROR(EINVAL);
1316 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1317 return -XFS_ERROR(EINVAL);
1319 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1320 (struct getbmapx *)arg+1);
1324 /* copy back header */
1325 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1326 return -XFS_ERROR(EFAULT);
1332 * Note: some of the ioctl's return positive numbers as a
1333 * byte count indicating success, such as readlink_by_handle.
1334 * So we don't "sign flip" like most other routines. This means
1335 * true errors need to be returned as a negative value.
1343 struct inode *inode = file_inode(filp);
1344 struct xfs_inode *ip = XFS_I(inode);
1345 struct xfs_mount *mp = ip->i_mount;
1346 void __user *arg = (void __user *)p;
1350 if (filp->f_mode & FMODE_NOCMTIME)
1351 ioflags |= IO_INVIS;
1353 trace_xfs_file_ioctl(ip);
1357 return xfs_ioc_trim(mp, arg);
1358 case XFS_IOC_ALLOCSP:
1359 case XFS_IOC_FREESP:
1360 case XFS_IOC_RESVSP:
1361 case XFS_IOC_UNRESVSP:
1362 case XFS_IOC_ALLOCSP64:
1363 case XFS_IOC_FREESP64:
1364 case XFS_IOC_RESVSP64:
1365 case XFS_IOC_UNRESVSP64:
1366 case XFS_IOC_ZERO_RANGE: {
1369 if (copy_from_user(&bf, arg, sizeof(bf)))
1370 return -XFS_ERROR(EFAULT);
1371 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1373 case XFS_IOC_DIOINFO: {
1375 xfs_buftarg_t *target =
1376 XFS_IS_REALTIME_INODE(ip) ?
1377 mp->m_rtdev_targp : mp->m_ddev_targp;
1379 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1380 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1382 if (copy_to_user(arg, &da, sizeof(da)))
1383 return -XFS_ERROR(EFAULT);
1387 case XFS_IOC_FSBULKSTAT_SINGLE:
1388 case XFS_IOC_FSBULKSTAT:
1389 case XFS_IOC_FSINUMBERS:
1390 return xfs_ioc_bulkstat(mp, cmd, arg);
1392 case XFS_IOC_FSGEOMETRY_V1:
1393 return xfs_ioc_fsgeometry_v1(mp, arg);
1395 case XFS_IOC_FSGEOMETRY:
1396 return xfs_ioc_fsgeometry(mp, arg);
1398 case XFS_IOC_GETVERSION:
1399 return put_user(inode->i_generation, (int __user *)arg);
1401 case XFS_IOC_FSGETXATTR:
1402 return xfs_ioc_fsgetxattr(ip, 0, arg);
1403 case XFS_IOC_FSGETXATTRA:
1404 return xfs_ioc_fsgetxattr(ip, 1, arg);
1405 case XFS_IOC_FSSETXATTR:
1406 return xfs_ioc_fssetxattr(ip, filp, arg);
1407 case XFS_IOC_GETXFLAGS:
1408 return xfs_ioc_getxflags(ip, arg);
1409 case XFS_IOC_SETXFLAGS:
1410 return xfs_ioc_setxflags(ip, filp, arg);
1412 case XFS_IOC_FSSETDM: {
1413 struct fsdmidata dmi;
1415 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1416 return -XFS_ERROR(EFAULT);
1418 error = mnt_want_write_file(filp);
1422 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1424 mnt_drop_write_file(filp);
1428 case XFS_IOC_GETBMAP:
1429 case XFS_IOC_GETBMAPA:
1430 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1432 case XFS_IOC_GETBMAPX:
1433 return xfs_ioc_getbmapx(ip, arg);
1435 case XFS_IOC_FD_TO_HANDLE:
1436 case XFS_IOC_PATH_TO_HANDLE:
1437 case XFS_IOC_PATH_TO_FSHANDLE: {
1438 xfs_fsop_handlereq_t hreq;
1440 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1441 return -XFS_ERROR(EFAULT);
1442 return xfs_find_handle(cmd, &hreq);
1444 case XFS_IOC_OPEN_BY_HANDLE: {
1445 xfs_fsop_handlereq_t hreq;
1447 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1448 return -XFS_ERROR(EFAULT);
1449 return xfs_open_by_handle(filp, &hreq);
1451 case XFS_IOC_FSSETDM_BY_HANDLE:
1452 return xfs_fssetdm_by_handle(filp, arg);
1454 case XFS_IOC_READLINK_BY_HANDLE: {
1455 xfs_fsop_handlereq_t hreq;
1457 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1458 return -XFS_ERROR(EFAULT);
1459 return xfs_readlink_by_handle(filp, &hreq);
1461 case XFS_IOC_ATTRLIST_BY_HANDLE:
1462 return xfs_attrlist_by_handle(filp, arg);
1464 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1465 return xfs_attrmulti_by_handle(filp, arg);
1467 case XFS_IOC_SWAPEXT: {
1468 struct xfs_swapext sxp;
1470 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1471 return -XFS_ERROR(EFAULT);
1472 error = mnt_want_write_file(filp);
1475 error = xfs_swapext(&sxp);
1476 mnt_drop_write_file(filp);
1480 case XFS_IOC_FSCOUNTS: {
1481 xfs_fsop_counts_t out;
1483 error = xfs_fs_counts(mp, &out);
1487 if (copy_to_user(arg, &out, sizeof(out)))
1488 return -XFS_ERROR(EFAULT);
1492 case XFS_IOC_SET_RESBLKS: {
1493 xfs_fsop_resblks_t inout;
1496 if (!capable(CAP_SYS_ADMIN))
1499 if (mp->m_flags & XFS_MOUNT_RDONLY)
1500 return -XFS_ERROR(EROFS);
1502 if (copy_from_user(&inout, arg, sizeof(inout)))
1503 return -XFS_ERROR(EFAULT);
1505 error = mnt_want_write_file(filp);
1509 /* input parameter is passed in resblks field of structure */
1511 error = xfs_reserve_blocks(mp, &in, &inout);
1512 mnt_drop_write_file(filp);
1516 if (copy_to_user(arg, &inout, sizeof(inout)))
1517 return -XFS_ERROR(EFAULT);
1521 case XFS_IOC_GET_RESBLKS: {
1522 xfs_fsop_resblks_t out;
1524 if (!capable(CAP_SYS_ADMIN))
1527 error = xfs_reserve_blocks(mp, NULL, &out);
1531 if (copy_to_user(arg, &out, sizeof(out)))
1532 return -XFS_ERROR(EFAULT);
1537 case XFS_IOC_FSGROWFSDATA: {
1538 xfs_growfs_data_t in;
1540 if (copy_from_user(&in, arg, sizeof(in)))
1541 return -XFS_ERROR(EFAULT);
1543 error = mnt_want_write_file(filp);
1546 error = xfs_growfs_data(mp, &in);
1547 mnt_drop_write_file(filp);
1551 case XFS_IOC_FSGROWFSLOG: {
1552 xfs_growfs_log_t in;
1554 if (copy_from_user(&in, arg, sizeof(in)))
1555 return -XFS_ERROR(EFAULT);
1557 error = mnt_want_write_file(filp);
1560 error = xfs_growfs_log(mp, &in);
1561 mnt_drop_write_file(filp);
1565 case XFS_IOC_FSGROWFSRT: {
1568 if (copy_from_user(&in, arg, sizeof(in)))
1569 return -XFS_ERROR(EFAULT);
1571 error = mnt_want_write_file(filp);
1574 error = xfs_growfs_rt(mp, &in);
1575 mnt_drop_write_file(filp);
1579 case XFS_IOC_GOINGDOWN: {
1582 if (!capable(CAP_SYS_ADMIN))
1585 if (get_user(in, (__uint32_t __user *)arg))
1586 return -XFS_ERROR(EFAULT);
1588 error = xfs_fs_goingdown(mp, in);
1592 case XFS_IOC_ERROR_INJECTION: {
1593 xfs_error_injection_t in;
1595 if (!capable(CAP_SYS_ADMIN))
1598 if (copy_from_user(&in, arg, sizeof(in)))
1599 return -XFS_ERROR(EFAULT);
1601 error = xfs_errortag_add(in.errtag, mp);
1605 case XFS_IOC_ERROR_CLEARALL:
1606 if (!capable(CAP_SYS_ADMIN))
1609 error = xfs_errortag_clearall(mp, 1);
1612 case XFS_IOC_FREE_EOFBLOCKS: {
1613 struct xfs_eofblocks eofb;
1615 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1616 return -XFS_ERROR(EFAULT);
1618 if (eofb.eof_version != XFS_EOFBLOCKS_VERSION)
1619 return -XFS_ERROR(EINVAL);
1621 if (eofb.eof_flags & ~XFS_EOF_FLAGS_VALID)
1622 return -XFS_ERROR(EINVAL);
1624 if (memchr_inv(&eofb.pad32, 0, sizeof(eofb.pad32)) ||
1625 memchr_inv(eofb.pad64, 0, sizeof(eofb.pad64)))
1626 return -XFS_ERROR(EINVAL);
1628 error = xfs_icache_free_eofblocks(mp, &eofb);