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"
46 #include <linux/capability.h>
47 #include <linux/dcache.h>
48 #include <linux/mount.h>
49 #include <linux/namei.h>
50 #include <linux/pagemap.h>
51 #include <linux/slab.h>
52 #include <linux/exportfs.h>
55 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
56 * a file or fs handle.
58 * XFS_IOC_PATH_TO_FSHANDLE
59 * returns fs handle for a mount point or path within that mount point
60 * XFS_IOC_FD_TO_HANDLE
61 * returns full handle for a FD opened in user space
62 * XFS_IOC_PATH_TO_HANDLE
63 * returns full handle for a path
68 xfs_fsop_handlereq_t *hreq)
73 struct file *file = NULL;
78 if (cmd == XFS_IOC_FD_TO_HANDLE) {
79 file = fget(hreq->fd);
82 inode = file->f_path.dentry->d_inode;
84 error = user_lpath((const char __user *)hreq->path, &path);
87 inode = path.dentry->d_inode;
92 * We can only generate handles for inodes residing on a XFS filesystem,
93 * and only for regular files, directories or symbolic links.
96 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
100 if (!S_ISREG(inode->i_mode) &&
101 !S_ISDIR(inode->i_mode) &&
102 !S_ISLNK(inode->i_mode))
106 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
108 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
110 * This handle only contains an fsid, zero the rest.
112 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
113 hsize = sizeof(xfs_fsid_t);
117 lock_mode = xfs_ilock_map_shared(ip);
118 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
119 sizeof(handle.ha_fid.fid_len);
120 handle.ha_fid.fid_pad = 0;
121 handle.ha_fid.fid_gen = ip->i_d.di_gen;
122 handle.ha_fid.fid_ino = ip->i_ino;
123 xfs_iunlock_map_shared(ip, lock_mode);
125 hsize = XFS_HSIZE(handle);
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(parfilp->f_path.dentry->d_inode->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))
214 return -XFS_ERROR(EPERM);
216 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
218 return PTR_ERR(dentry);
219 inode = dentry->d_inode;
221 /* Restrict xfs_open_by_handle to directories & regular files. */
222 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
223 error = -XFS_ERROR(EPERM);
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)) {
235 error = -XFS_ERROR(EPERM);
239 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
240 error = -XFS_ERROR(EACCES);
244 /* Can't write directories. */
245 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
246 error = -XFS_ERROR(EISDIR);
250 fd = get_unused_fd();
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 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
280 * unused first argument.
295 if (len > (unsigned) buflen)
297 if (copy_to_user(buffer, link, len))
305 xfs_readlink_by_handle(
306 struct file *parfilp,
307 xfs_fsop_handlereq_t *hreq)
309 struct dentry *dentry;
314 if (!capable(CAP_SYS_ADMIN))
315 return -XFS_ERROR(EPERM);
317 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
319 return PTR_ERR(dentry);
321 /* Restrict this handle operation to symlinks only. */
322 if (!S_ISLNK(dentry->d_inode->i_mode)) {
323 error = -XFS_ERROR(EINVAL);
327 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
328 error = -XFS_ERROR(EFAULT);
332 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
334 error = -XFS_ERROR(ENOMEM);
338 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
341 error = do_readlink(hreq->ohandle, olen, link);
353 xfs_fssetdm_by_handle(
354 struct file *parfilp,
358 struct fsdmidata fsd;
359 xfs_fsop_setdm_handlereq_t dmhreq;
360 struct dentry *dentry;
362 if (!capable(CAP_MKNOD))
363 return -XFS_ERROR(EPERM);
364 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
365 return -XFS_ERROR(EFAULT);
367 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
369 return PTR_ERR(dentry);
371 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
372 error = -XFS_ERROR(EPERM);
376 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
377 error = -XFS_ERROR(EFAULT);
381 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
390 xfs_attrlist_by_handle(
391 struct file *parfilp,
395 attrlist_cursor_kern_t *cursor;
396 xfs_fsop_attrlist_handlereq_t al_hreq;
397 struct dentry *dentry;
400 if (!capable(CAP_SYS_ADMIN))
401 return -XFS_ERROR(EPERM);
402 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
403 return -XFS_ERROR(EFAULT);
404 if (al_hreq.buflen > XATTR_LIST_MAX)
405 return -XFS_ERROR(EINVAL);
408 * Reject flags, only allow namespaces.
410 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
411 return -XFS_ERROR(EINVAL);
413 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
415 return PTR_ERR(dentry);
417 kbuf = kzalloc(al_hreq.buflen, GFP_KERNEL);
421 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
422 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
423 al_hreq.flags, cursor);
427 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
438 xfs_attrmulti_attr_get(
441 unsigned char __user *ubuf,
448 if (*len > XATTR_SIZE_MAX)
450 kbuf = kmem_zalloc(*len, KM_SLEEP | KM_MAYFAIL);
452 kbuf = kmem_zalloc_large(*len);
457 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
461 if (copy_to_user(ubuf, kbuf, *len))
465 if (is_vmalloc_addr(kbuf))
466 kmem_free_large(kbuf);
473 xfs_attrmulti_attr_set(
476 const unsigned char __user *ubuf,
483 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
485 if (len > 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);
498 xfs_attrmulti_attr_remove(
503 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
505 return xfs_attr_remove(XFS_I(inode), name, flags);
509 xfs_attrmulti_by_handle(
510 struct file *parfilp,
514 xfs_attr_multiop_t *ops;
515 xfs_fsop_attrmulti_handlereq_t am_hreq;
516 struct dentry *dentry;
517 unsigned int i, size;
518 unsigned char *attr_name;
520 if (!capable(CAP_SYS_ADMIN))
521 return -XFS_ERROR(EPERM);
522 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
523 return -XFS_ERROR(EFAULT);
526 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
529 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
531 return PTR_ERR(dentry);
534 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
535 if (!size || size > 16 * PAGE_SIZE)
538 ops = memdup_user(am_hreq.ops, size);
540 error = PTR_ERR(ops);
544 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
549 for (i = 0; i < am_hreq.opcount; i++) {
550 ops[i].am_error = strncpy_from_user((char *)attr_name,
551 ops[i].am_attrname, MAXNAMELEN);
552 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
554 if (ops[i].am_error < 0)
557 switch (ops[i].am_opcode) {
559 ops[i].am_error = xfs_attrmulti_attr_get(
560 dentry->d_inode, attr_name,
561 ops[i].am_attrvalue, &ops[i].am_length,
565 ops[i].am_error = mnt_want_write_file(parfilp);
568 ops[i].am_error = xfs_attrmulti_attr_set(
569 dentry->d_inode, attr_name,
570 ops[i].am_attrvalue, ops[i].am_length,
572 mnt_drop_write_file(parfilp);
575 ops[i].am_error = mnt_want_write_file(parfilp);
578 ops[i].am_error = xfs_attrmulti_attr_remove(
579 dentry->d_inode, attr_name,
581 mnt_drop_write_file(parfilp);
584 ops[i].am_error = EINVAL;
588 if (copy_to_user(am_hreq.ops, ops, size))
589 error = XFS_ERROR(EFAULT);
601 struct xfs_inode *ip,
612 * Only allow the sys admin to reserve space unless
613 * unwritten extents are enabled.
615 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
616 !capable(CAP_SYS_ADMIN))
617 return -XFS_ERROR(EPERM);
619 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
620 return -XFS_ERROR(EPERM);
622 if (!(filp->f_mode & FMODE_WRITE))
623 return -XFS_ERROR(EBADF);
625 if (!S_ISREG(inode->i_mode))
626 return -XFS_ERROR(EINVAL);
628 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
629 attr_flags |= XFS_ATTR_NONBLOCK;
631 if (filp->f_flags & O_DSYNC)
632 attr_flags |= XFS_ATTR_SYNC;
634 if (ioflags & IO_INVIS)
635 attr_flags |= XFS_ATTR_DMI;
637 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
647 xfs_fsop_bulkreq_t bulkreq;
648 int count; /* # of records returned */
649 xfs_ino_t inlast; /* last inode number */
653 /* done = 1 if there are more stats to get and if bulkstat */
654 /* should be called again (unused here, but used in dmapi) */
656 if (!capable(CAP_SYS_ADMIN))
659 if (XFS_FORCED_SHUTDOWN(mp))
660 return -XFS_ERROR(EIO);
662 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
663 return -XFS_ERROR(EFAULT);
665 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
666 return -XFS_ERROR(EFAULT);
668 if ((count = bulkreq.icount) <= 0)
669 return -XFS_ERROR(EINVAL);
671 if (bulkreq.ubuffer == NULL)
672 return -XFS_ERROR(EINVAL);
674 if (cmd == XFS_IOC_FSINUMBERS)
675 error = xfs_inumbers(mp, &inlast, &count,
676 bulkreq.ubuffer, xfs_inumbers_fmt);
677 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
678 error = xfs_bulkstat_single(mp, &inlast,
679 bulkreq.ubuffer, &done);
680 else /* XFS_IOC_FSBULKSTAT */
681 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
682 sizeof(xfs_bstat_t), bulkreq.ubuffer,
688 if (bulkreq.ocount != NULL) {
689 if (copy_to_user(bulkreq.lastip, &inlast,
691 return -XFS_ERROR(EFAULT);
693 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
694 return -XFS_ERROR(EFAULT);
701 xfs_ioc_fsgeometry_v1(
705 xfs_fsop_geom_t fsgeo;
708 error = xfs_fs_geometry(mp, &fsgeo, 3);
713 * Caller should have passed an argument of type
714 * xfs_fsop_geom_v1_t. This is a proper subset of the
715 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
717 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
718 return -XFS_ERROR(EFAULT);
727 xfs_fsop_geom_t fsgeo;
730 error = xfs_fs_geometry(mp, &fsgeo, 4);
734 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
735 return -XFS_ERROR(EFAULT);
740 * Linux extended inode flags interface.
744 xfs_merge_ioc_xflags(
748 unsigned int xflags = start;
750 if (flags & FS_IMMUTABLE_FL)
751 xflags |= XFS_XFLAG_IMMUTABLE;
753 xflags &= ~XFS_XFLAG_IMMUTABLE;
754 if (flags & FS_APPEND_FL)
755 xflags |= XFS_XFLAG_APPEND;
757 xflags &= ~XFS_XFLAG_APPEND;
758 if (flags & FS_SYNC_FL)
759 xflags |= XFS_XFLAG_SYNC;
761 xflags &= ~XFS_XFLAG_SYNC;
762 if (flags & FS_NOATIME_FL)
763 xflags |= XFS_XFLAG_NOATIME;
765 xflags &= ~XFS_XFLAG_NOATIME;
766 if (flags & FS_NODUMP_FL)
767 xflags |= XFS_XFLAG_NODUMP;
769 xflags &= ~XFS_XFLAG_NODUMP;
778 unsigned int flags = 0;
780 if (di_flags & XFS_DIFLAG_IMMUTABLE)
781 flags |= FS_IMMUTABLE_FL;
782 if (di_flags & XFS_DIFLAG_APPEND)
783 flags |= FS_APPEND_FL;
784 if (di_flags & XFS_DIFLAG_SYNC)
786 if (di_flags & XFS_DIFLAG_NOATIME)
787 flags |= FS_NOATIME_FL;
788 if (di_flags & XFS_DIFLAG_NODUMP)
789 flags |= FS_NODUMP_FL;
801 memset(&fa, 0, sizeof(struct fsxattr));
803 xfs_ilock(ip, XFS_ILOCK_SHARED);
804 fa.fsx_xflags = xfs_ip2xflags(ip);
805 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
806 fa.fsx_projid = xfs_get_projid(ip);
810 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
811 fa.fsx_nextents = ip->i_afp->if_bytes /
812 sizeof(xfs_bmbt_rec_t);
814 fa.fsx_nextents = ip->i_d.di_anextents;
818 if (ip->i_df.if_flags & XFS_IFEXTENTS)
819 fa.fsx_nextents = ip->i_df.if_bytes /
820 sizeof(xfs_bmbt_rec_t);
822 fa.fsx_nextents = ip->i_d.di_nextents;
824 xfs_iunlock(ip, XFS_ILOCK_SHARED);
826 if (copy_to_user(arg, &fa, sizeof(fa)))
833 struct xfs_inode *ip,
836 unsigned int di_flags;
838 /* can't set PREALLOC this way, just preserve it */
839 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
840 if (xflags & XFS_XFLAG_IMMUTABLE)
841 di_flags |= XFS_DIFLAG_IMMUTABLE;
842 if (xflags & XFS_XFLAG_APPEND)
843 di_flags |= XFS_DIFLAG_APPEND;
844 if (xflags & XFS_XFLAG_SYNC)
845 di_flags |= XFS_DIFLAG_SYNC;
846 if (xflags & XFS_XFLAG_NOATIME)
847 di_flags |= XFS_DIFLAG_NOATIME;
848 if (xflags & XFS_XFLAG_NODUMP)
849 di_flags |= XFS_DIFLAG_NODUMP;
850 if (xflags & XFS_XFLAG_PROJINHERIT)
851 di_flags |= XFS_DIFLAG_PROJINHERIT;
852 if (xflags & XFS_XFLAG_NODEFRAG)
853 di_flags |= XFS_DIFLAG_NODEFRAG;
854 if (xflags & XFS_XFLAG_FILESTREAM)
855 di_flags |= XFS_DIFLAG_FILESTREAM;
856 if (S_ISDIR(ip->i_d.di_mode)) {
857 if (xflags & XFS_XFLAG_RTINHERIT)
858 di_flags |= XFS_DIFLAG_RTINHERIT;
859 if (xflags & XFS_XFLAG_NOSYMLINKS)
860 di_flags |= XFS_DIFLAG_NOSYMLINKS;
861 if (xflags & XFS_XFLAG_EXTSZINHERIT)
862 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
863 } else if (S_ISREG(ip->i_d.di_mode)) {
864 if (xflags & XFS_XFLAG_REALTIME)
865 di_flags |= XFS_DIFLAG_REALTIME;
866 if (xflags & XFS_XFLAG_EXTSIZE)
867 di_flags |= XFS_DIFLAG_EXTSIZE;
870 ip->i_d.di_flags = di_flags;
874 xfs_diflags_to_linux(
875 struct xfs_inode *ip)
877 struct inode *inode = VFS_I(ip);
878 unsigned int xflags = xfs_ip2xflags(ip);
880 if (xflags & XFS_XFLAG_IMMUTABLE)
881 inode->i_flags |= S_IMMUTABLE;
883 inode->i_flags &= ~S_IMMUTABLE;
884 if (xflags & XFS_XFLAG_APPEND)
885 inode->i_flags |= S_APPEND;
887 inode->i_flags &= ~S_APPEND;
888 if (xflags & XFS_XFLAG_SYNC)
889 inode->i_flags |= S_SYNC;
891 inode->i_flags &= ~S_SYNC;
892 if (xflags & XFS_XFLAG_NOATIME)
893 inode->i_flags |= S_NOATIME;
895 inode->i_flags &= ~S_NOATIME;
899 #define FSX_EXTSIZE 2
901 #define FSX_NONBLOCK 8
909 struct xfs_mount *mp = ip->i_mount;
910 struct xfs_trans *tp;
911 unsigned int lock_flags = 0;
912 struct xfs_dquot *udqp = NULL;
913 struct xfs_dquot *gdqp = NULL;
914 struct xfs_dquot *olddquot = NULL;
917 trace_xfs_ioctl_setattr(ip);
919 if (mp->m_flags & XFS_MOUNT_RDONLY)
920 return XFS_ERROR(EROFS);
921 if (XFS_FORCED_SHUTDOWN(mp))
922 return XFS_ERROR(EIO);
925 * Disallow 32bit project ids when projid32bit feature is not enabled.
927 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
928 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
929 return XFS_ERROR(EINVAL);
932 * If disk quotas is on, we make sure that the dquots do exist on disk,
933 * before we start any other transactions. Trying to do this later
934 * is messy. We don't care to take a readlock to look at the ids
935 * in inode here, because we can't hold it across the trans_reserve.
936 * If the IDs do change before we take the ilock, we're covered
937 * because the i_*dquot fields will get updated anyway.
939 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
940 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
941 ip->i_d.di_gid, fa->fsx_projid,
942 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
948 * For the other attributes, we acquire the inode lock and
949 * first do an error checking pass.
951 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
952 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
956 lock_flags = XFS_ILOCK_EXCL;
957 xfs_ilock(ip, lock_flags);
960 * CAP_FOWNER overrides the following restrictions:
962 * The user ID of the calling process must be equal
963 * to the file owner ID, except in cases where the
964 * CAP_FSETID capability is applicable.
966 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
967 code = XFS_ERROR(EPERM);
972 * Do a quota reservation only if projid is actually going to change.
974 if (mask & FSX_PROJID) {
975 if (XFS_IS_QUOTA_RUNNING(mp) &&
976 XFS_IS_PQUOTA_ON(mp) &&
977 xfs_get_projid(ip) != fa->fsx_projid) {
979 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
980 capable(CAP_FOWNER) ?
981 XFS_QMOPT_FORCE_RES : 0);
982 if (code) /* out of quota */
987 if (mask & FSX_EXTSIZE) {
989 * Can't change extent size if any extents are allocated.
991 if (ip->i_d.di_nextents &&
992 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
994 code = XFS_ERROR(EINVAL); /* EFBIG? */
999 * Extent size must be a multiple of the appropriate block
1000 * size, if set at all. It must also be smaller than the
1001 * maximum extent size supported by the filesystem.
1003 * Also, for non-realtime files, limit the extent size hint to
1004 * half the size of the AGs in the filesystem so alignment
1005 * doesn't result in extents larger than an AG.
1007 if (fa->fsx_extsize != 0) {
1009 xfs_fsblock_t extsize_fsb;
1011 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1012 if (extsize_fsb > MAXEXTLEN) {
1013 code = XFS_ERROR(EINVAL);
1017 if (XFS_IS_REALTIME_INODE(ip) ||
1018 ((mask & FSX_XFLAGS) &&
1019 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1020 size = mp->m_sb.sb_rextsize <<
1021 mp->m_sb.sb_blocklog;
1023 size = mp->m_sb.sb_blocksize;
1024 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1025 code = XFS_ERROR(EINVAL);
1030 if (fa->fsx_extsize % size) {
1031 code = XFS_ERROR(EINVAL);
1038 if (mask & FSX_XFLAGS) {
1040 * Can't change realtime flag if any extents are allocated.
1042 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1043 (XFS_IS_REALTIME_INODE(ip)) !=
1044 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1045 code = XFS_ERROR(EINVAL); /* EFBIG? */
1050 * If realtime flag is set then must have realtime data.
1052 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1053 if ((mp->m_sb.sb_rblocks == 0) ||
1054 (mp->m_sb.sb_rextsize == 0) ||
1055 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1056 code = XFS_ERROR(EINVAL);
1062 * Can't modify an immutable/append-only file unless
1063 * we have appropriate permission.
1065 if ((ip->i_d.di_flags &
1066 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1068 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1069 !capable(CAP_LINUX_IMMUTABLE)) {
1070 code = XFS_ERROR(EPERM);
1075 xfs_trans_ijoin(tp, ip, 0);
1078 * Change file ownership. Must be the owner or privileged.
1080 if (mask & FSX_PROJID) {
1082 * CAP_FSETID overrides the following restrictions:
1084 * The set-user-ID and set-group-ID bits of a file will be
1085 * cleared upon successful return from chown()
1087 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1088 !capable(CAP_FSETID))
1089 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1092 * Change the ownerships and register quota modifications
1093 * in the transaction.
1095 if (xfs_get_projid(ip) != fa->fsx_projid) {
1096 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1097 olddquot = xfs_qm_vop_chown(tp, ip,
1098 &ip->i_gdquot, gdqp);
1100 xfs_set_projid(ip, fa->fsx_projid);
1103 * We may have to rev the inode as well as
1104 * the superblock version number since projids didn't
1105 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1107 if (ip->i_d.di_version == 1)
1108 xfs_bump_ino_vers2(tp, ip);
1113 if (mask & FSX_EXTSIZE)
1114 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1115 if (mask & FSX_XFLAGS) {
1116 xfs_set_diflags(ip, fa->fsx_xflags);
1117 xfs_diflags_to_linux(ip);
1120 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1121 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1123 XFS_STATS_INC(xs_ig_attrchg);
1126 * If this is a synchronous mount, make sure that the
1127 * transaction goes to disk before returning to the user.
1128 * This is slightly sub-optimal in that truncates require
1129 * two sync transactions instead of one for wsync filesystems.
1130 * One for the truncate and one for the timestamps since we
1131 * don't want to change the timestamps unless we're sure the
1132 * truncate worked. Truncates are less than 1% of the laddis
1133 * mix so this probably isn't worth the trouble to optimize.
1135 if (mp->m_flags & XFS_MOUNT_WSYNC)
1136 xfs_trans_set_sync(tp);
1137 code = xfs_trans_commit(tp, 0);
1138 xfs_iunlock(ip, lock_flags);
1141 * Release any dquot(s) the inode had kept before chown.
1143 xfs_qm_dqrele(olddquot);
1144 xfs_qm_dqrele(udqp);
1145 xfs_qm_dqrele(gdqp);
1150 xfs_qm_dqrele(udqp);
1151 xfs_qm_dqrele(gdqp);
1152 xfs_trans_cancel(tp, 0);
1154 xfs_iunlock(ip, lock_flags);
1167 if (copy_from_user(&fa, arg, sizeof(fa)))
1170 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1171 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1172 mask |= FSX_NONBLOCK;
1174 return -xfs_ioctl_setattr(ip, &fa, mask);
1184 flags = xfs_di2lxflags(ip->i_d.di_flags);
1185 if (copy_to_user(arg, &flags, sizeof(flags)))
1200 if (copy_from_user(&flags, arg, sizeof(flags)))
1203 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1204 FS_NOATIME_FL | FS_NODUMP_FL | \
1209 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1210 mask |= FSX_NONBLOCK;
1211 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1213 return -xfs_ioctl_setattr(ip, &fa, mask);
1217 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1219 struct getbmap __user *base = *ap;
1221 /* copy only getbmap portion (not getbmapx) */
1222 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1223 return XFS_ERROR(EFAULT);
1225 *ap += sizeof(struct getbmap);
1231 struct xfs_inode *ip,
1236 struct getbmapx bmx;
1239 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1240 return -XFS_ERROR(EFAULT);
1242 if (bmx.bmv_count < 2)
1243 return -XFS_ERROR(EINVAL);
1245 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1246 if (ioflags & IO_INVIS)
1247 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1249 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1250 (struct getbmap *)arg+1);
1254 /* copy back header - only size of getbmap */
1255 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1256 return -XFS_ERROR(EFAULT);
1261 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1263 struct getbmapx __user *base = *ap;
1265 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1266 return XFS_ERROR(EFAULT);
1268 *ap += sizeof(struct getbmapx);
1274 struct xfs_inode *ip,
1277 struct getbmapx bmx;
1280 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1281 return -XFS_ERROR(EFAULT);
1283 if (bmx.bmv_count < 2)
1284 return -XFS_ERROR(EINVAL);
1286 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1287 return -XFS_ERROR(EINVAL);
1289 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1290 (struct getbmapx *)arg+1);
1294 /* copy back header */
1295 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1296 return -XFS_ERROR(EFAULT);
1302 * Note: some of the ioctl's return positive numbers as a
1303 * byte count indicating success, such as readlink_by_handle.
1304 * So we don't "sign flip" like most other routines. This means
1305 * true errors need to be returned as a negative value.
1313 struct inode *inode = filp->f_path.dentry->d_inode;
1314 struct xfs_inode *ip = XFS_I(inode);
1315 struct xfs_mount *mp = ip->i_mount;
1316 void __user *arg = (void __user *)p;
1320 if (filp->f_mode & FMODE_NOCMTIME)
1321 ioflags |= IO_INVIS;
1323 trace_xfs_file_ioctl(ip);
1327 return xfs_ioc_trim(mp, arg);
1328 case XFS_IOC_ALLOCSP:
1329 case XFS_IOC_FREESP:
1330 case XFS_IOC_RESVSP:
1331 case XFS_IOC_UNRESVSP:
1332 case XFS_IOC_ALLOCSP64:
1333 case XFS_IOC_FREESP64:
1334 case XFS_IOC_RESVSP64:
1335 case XFS_IOC_UNRESVSP64:
1336 case XFS_IOC_ZERO_RANGE: {
1339 if (copy_from_user(&bf, arg, sizeof(bf)))
1340 return -XFS_ERROR(EFAULT);
1341 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1343 case XFS_IOC_DIOINFO: {
1345 xfs_buftarg_t *target =
1346 XFS_IS_REALTIME_INODE(ip) ?
1347 mp->m_rtdev_targp : mp->m_ddev_targp;
1349 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1350 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1352 if (copy_to_user(arg, &da, sizeof(da)))
1353 return -XFS_ERROR(EFAULT);
1357 case XFS_IOC_FSBULKSTAT_SINGLE:
1358 case XFS_IOC_FSBULKSTAT:
1359 case XFS_IOC_FSINUMBERS:
1360 return xfs_ioc_bulkstat(mp, cmd, arg);
1362 case XFS_IOC_FSGEOMETRY_V1:
1363 return xfs_ioc_fsgeometry_v1(mp, arg);
1365 case XFS_IOC_FSGEOMETRY:
1366 return xfs_ioc_fsgeometry(mp, arg);
1368 case XFS_IOC_GETVERSION:
1369 return put_user(inode->i_generation, (int __user *)arg);
1371 case XFS_IOC_FSGETXATTR:
1372 return xfs_ioc_fsgetxattr(ip, 0, arg);
1373 case XFS_IOC_FSGETXATTRA:
1374 return xfs_ioc_fsgetxattr(ip, 1, arg);
1375 case XFS_IOC_FSSETXATTR:
1376 return xfs_ioc_fssetxattr(ip, filp, arg);
1377 case XFS_IOC_GETXFLAGS:
1378 return xfs_ioc_getxflags(ip, arg);
1379 case XFS_IOC_SETXFLAGS:
1380 return xfs_ioc_setxflags(ip, filp, arg);
1382 case XFS_IOC_FSSETDM: {
1383 struct fsdmidata dmi;
1385 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1386 return -XFS_ERROR(EFAULT);
1388 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1393 case XFS_IOC_GETBMAP:
1394 case XFS_IOC_GETBMAPA:
1395 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1397 case XFS_IOC_GETBMAPX:
1398 return xfs_ioc_getbmapx(ip, arg);
1400 case XFS_IOC_FD_TO_HANDLE:
1401 case XFS_IOC_PATH_TO_HANDLE:
1402 case XFS_IOC_PATH_TO_FSHANDLE: {
1403 xfs_fsop_handlereq_t hreq;
1405 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1406 return -XFS_ERROR(EFAULT);
1407 return xfs_find_handle(cmd, &hreq);
1409 case XFS_IOC_OPEN_BY_HANDLE: {
1410 xfs_fsop_handlereq_t hreq;
1412 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1413 return -XFS_ERROR(EFAULT);
1414 return xfs_open_by_handle(filp, &hreq);
1416 case XFS_IOC_FSSETDM_BY_HANDLE:
1417 return xfs_fssetdm_by_handle(filp, arg);
1419 case XFS_IOC_READLINK_BY_HANDLE: {
1420 xfs_fsop_handlereq_t hreq;
1422 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1423 return -XFS_ERROR(EFAULT);
1424 return xfs_readlink_by_handle(filp, &hreq);
1426 case XFS_IOC_ATTRLIST_BY_HANDLE:
1427 return xfs_attrlist_by_handle(filp, arg);
1429 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1430 return xfs_attrmulti_by_handle(filp, arg);
1432 case XFS_IOC_SWAPEXT: {
1433 struct xfs_swapext sxp;
1435 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1436 return -XFS_ERROR(EFAULT);
1437 error = xfs_swapext(&sxp);
1441 case XFS_IOC_FSCOUNTS: {
1442 xfs_fsop_counts_t out;
1444 error = xfs_fs_counts(mp, &out);
1448 if (copy_to_user(arg, &out, sizeof(out)))
1449 return -XFS_ERROR(EFAULT);
1453 case XFS_IOC_SET_RESBLKS: {
1454 xfs_fsop_resblks_t inout;
1457 if (!capable(CAP_SYS_ADMIN))
1460 if (mp->m_flags & XFS_MOUNT_RDONLY)
1461 return -XFS_ERROR(EROFS);
1463 if (copy_from_user(&inout, arg, sizeof(inout)))
1464 return -XFS_ERROR(EFAULT);
1466 /* input parameter is passed in resblks field of structure */
1468 error = xfs_reserve_blocks(mp, &in, &inout);
1472 if (copy_to_user(arg, &inout, sizeof(inout)))
1473 return -XFS_ERROR(EFAULT);
1477 case XFS_IOC_GET_RESBLKS: {
1478 xfs_fsop_resblks_t out;
1480 if (!capable(CAP_SYS_ADMIN))
1483 error = xfs_reserve_blocks(mp, NULL, &out);
1487 if (copy_to_user(arg, &out, sizeof(out)))
1488 return -XFS_ERROR(EFAULT);
1493 case XFS_IOC_FSGROWFSDATA: {
1494 xfs_growfs_data_t in;
1496 if (copy_from_user(&in, arg, sizeof(in)))
1497 return -XFS_ERROR(EFAULT);
1499 error = xfs_growfs_data(mp, &in);
1503 case XFS_IOC_FSGROWFSLOG: {
1504 xfs_growfs_log_t in;
1506 if (copy_from_user(&in, arg, sizeof(in)))
1507 return -XFS_ERROR(EFAULT);
1509 error = xfs_growfs_log(mp, &in);
1513 case XFS_IOC_FSGROWFSRT: {
1516 if (copy_from_user(&in, arg, sizeof(in)))
1517 return -XFS_ERROR(EFAULT);
1519 error = xfs_growfs_rt(mp, &in);
1523 case XFS_IOC_GOINGDOWN: {
1526 if (!capable(CAP_SYS_ADMIN))
1529 if (get_user(in, (__uint32_t __user *)arg))
1530 return -XFS_ERROR(EFAULT);
1532 error = xfs_fs_goingdown(mp, in);
1536 case XFS_IOC_ERROR_INJECTION: {
1537 xfs_error_injection_t in;
1539 if (!capable(CAP_SYS_ADMIN))
1542 if (copy_from_user(&in, arg, sizeof(in)))
1543 return -XFS_ERROR(EFAULT);
1545 error = xfs_errortag_add(in.errtag, mp);
1549 case XFS_IOC_ERROR_CLEARALL:
1550 if (!capable(CAP_SYS_ADMIN))
1553 error = xfs_errortag_clearall(mp, 1);