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
23 #include "xfs_trans.h"
26 #include "xfs_alloc.h"
27 #include "xfs_mount.h"
28 #include "xfs_bmap_btree.h"
29 #include "xfs_dinode.h"
30 #include "xfs_inode.h"
31 #include "xfs_ioctl.h"
32 #include "xfs_rtalloc.h"
33 #include "xfs_itable.h"
34 #include "xfs_error.h"
37 #include "xfs_buf_item.h"
38 #include "xfs_utils.h"
39 #include "xfs_dfrag.h"
40 #include "xfs_fsops.h"
41 #include "xfs_vnodeops.h"
42 #include "xfs_quota.h"
43 #include "xfs_inode_item.h"
44 #include "xfs_export.h"
45 #include "xfs_trace.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)
74 struct file *file = NULL;
79 if (cmd == XFS_IOC_FD_TO_HANDLE) {
80 file = fget(hreq->fd);
83 inode = file->f_path.dentry->d_inode;
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(parfilp->f_path.dentry->d_inode->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;
212 if (!capable(CAP_SYS_ADMIN))
213 return -XFS_ERROR(EPERM);
215 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
217 return PTR_ERR(dentry);
218 inode = dentry->d_inode;
220 /* Restrict xfs_open_by_handle to directories & regular files. */
221 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
222 error = -XFS_ERROR(EPERM);
226 #if BITS_PER_LONG != 32
227 hreq->oflags |= O_LARGEFILE;
230 /* Put open permission in namei format. */
231 permflag = hreq->oflags;
232 if ((permflag+1) & O_ACCMODE)
234 if (permflag & O_TRUNC)
237 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
238 (permflag & FMODE_WRITE) && IS_APPEND(inode)) {
239 error = -XFS_ERROR(EPERM);
243 if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
244 error = -XFS_ERROR(EACCES);
248 /* Can't write directories. */
249 if (S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) {
250 error = -XFS_ERROR(EISDIR);
254 fd = get_unused_fd();
260 filp = dentry_open(dentry, mntget(parfilp->f_path.mnt),
264 return PTR_ERR(filp);
267 if (inode->i_mode & S_IFREG) {
268 filp->f_flags |= O_NOATIME;
269 filp->f_mode |= FMODE_NOCMTIME;
272 fd_install(fd, filp);
281 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
282 * unused first argument.
297 if (len > (unsigned) buflen)
299 if (copy_to_user(buffer, link, len))
307 xfs_readlink_by_handle(
308 struct file *parfilp,
309 xfs_fsop_handlereq_t *hreq)
311 struct dentry *dentry;
316 if (!capable(CAP_SYS_ADMIN))
317 return -XFS_ERROR(EPERM);
319 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
321 return PTR_ERR(dentry);
323 /* Restrict this handle operation to symlinks only. */
324 if (!S_ISLNK(dentry->d_inode->i_mode)) {
325 error = -XFS_ERROR(EINVAL);
329 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
330 error = -XFS_ERROR(EFAULT);
334 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
336 error = -XFS_ERROR(ENOMEM);
340 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
343 error = do_readlink(hreq->ohandle, olen, link);
355 xfs_fssetdm_by_handle(
356 struct file *parfilp,
360 struct fsdmidata fsd;
361 xfs_fsop_setdm_handlereq_t dmhreq;
362 struct dentry *dentry;
364 if (!capable(CAP_MKNOD))
365 return -XFS_ERROR(EPERM);
366 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
367 return -XFS_ERROR(EFAULT);
369 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
371 return PTR_ERR(dentry);
373 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
374 error = -XFS_ERROR(EPERM);
378 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
379 error = -XFS_ERROR(EFAULT);
383 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
392 xfs_attrlist_by_handle(
393 struct file *parfilp,
397 attrlist_cursor_kern_t *cursor;
398 xfs_fsop_attrlist_handlereq_t al_hreq;
399 struct dentry *dentry;
402 if (!capable(CAP_SYS_ADMIN))
403 return -XFS_ERROR(EPERM);
404 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
405 return -XFS_ERROR(EFAULT);
406 if (al_hreq.buflen > XATTR_LIST_MAX)
407 return -XFS_ERROR(EINVAL);
410 * Reject flags, only allow namespaces.
412 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
413 return -XFS_ERROR(EINVAL);
415 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
417 return PTR_ERR(dentry);
419 kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL);
423 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
424 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
425 al_hreq.flags, cursor);
429 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
440 xfs_attrmulti_attr_get(
443 unsigned char __user *ubuf,
450 if (*len > XATTR_SIZE_MAX)
452 kbuf = kmalloc(*len, GFP_KERNEL);
456 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
460 if (copy_to_user(ubuf, kbuf, *len))
469 xfs_attrmulti_attr_set(
472 const unsigned char __user *ubuf,
479 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
481 if (len > XATTR_SIZE_MAX)
484 kbuf = memdup_user(ubuf, len);
486 return PTR_ERR(kbuf);
488 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
494 xfs_attrmulti_attr_remove(
499 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
501 return xfs_attr_remove(XFS_I(inode), name, flags);
505 xfs_attrmulti_by_handle(
506 struct file *parfilp,
510 xfs_attr_multiop_t *ops;
511 xfs_fsop_attrmulti_handlereq_t am_hreq;
512 struct dentry *dentry;
513 unsigned int i, size;
514 unsigned char *attr_name;
516 if (!capable(CAP_SYS_ADMIN))
517 return -XFS_ERROR(EPERM);
518 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
519 return -XFS_ERROR(EFAULT);
522 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
525 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
527 return PTR_ERR(dentry);
530 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
531 if (!size || size > 16 * PAGE_SIZE)
534 ops = memdup_user(am_hreq.ops, size);
536 error = PTR_ERR(ops);
540 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
545 for (i = 0; i < am_hreq.opcount; i++) {
546 ops[i].am_error = strncpy_from_user((char *)attr_name,
547 ops[i].am_attrname, MAXNAMELEN);
548 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
550 if (ops[i].am_error < 0)
553 switch (ops[i].am_opcode) {
555 ops[i].am_error = xfs_attrmulti_attr_get(
556 dentry->d_inode, attr_name,
557 ops[i].am_attrvalue, &ops[i].am_length,
561 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
564 ops[i].am_error = xfs_attrmulti_attr_set(
565 dentry->d_inode, attr_name,
566 ops[i].am_attrvalue, ops[i].am_length,
568 mnt_drop_write(parfilp->f_path.mnt);
571 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
574 ops[i].am_error = xfs_attrmulti_attr_remove(
575 dentry->d_inode, attr_name,
577 mnt_drop_write(parfilp->f_path.mnt);
580 ops[i].am_error = EINVAL;
584 if (copy_to_user(am_hreq.ops, ops, size))
585 error = XFS_ERROR(EFAULT);
597 struct xfs_inode *ip,
608 * Only allow the sys admin to reserve space unless
609 * unwritten extents are enabled.
611 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
612 !capable(CAP_SYS_ADMIN))
613 return -XFS_ERROR(EPERM);
615 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
616 return -XFS_ERROR(EPERM);
618 if (!(filp->f_mode & FMODE_WRITE))
619 return -XFS_ERROR(EBADF);
621 if (!S_ISREG(inode->i_mode))
622 return -XFS_ERROR(EINVAL);
624 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
625 attr_flags |= XFS_ATTR_NONBLOCK;
626 if (ioflags & IO_INVIS)
627 attr_flags |= XFS_ATTR_DMI;
629 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
639 xfs_fsop_bulkreq_t bulkreq;
640 int count; /* # of records returned */
641 xfs_ino_t inlast; /* last inode number */
645 /* done = 1 if there are more stats to get and if bulkstat */
646 /* should be called again (unused here, but used in dmapi) */
648 if (!capable(CAP_SYS_ADMIN))
651 if (XFS_FORCED_SHUTDOWN(mp))
652 return -XFS_ERROR(EIO);
654 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
655 return -XFS_ERROR(EFAULT);
657 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
658 return -XFS_ERROR(EFAULT);
660 if ((count = bulkreq.icount) <= 0)
661 return -XFS_ERROR(EINVAL);
663 if (bulkreq.ubuffer == NULL)
664 return -XFS_ERROR(EINVAL);
666 if (cmd == XFS_IOC_FSINUMBERS)
667 error = xfs_inumbers(mp, &inlast, &count,
668 bulkreq.ubuffer, xfs_inumbers_fmt);
669 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
670 error = xfs_bulkstat_single(mp, &inlast,
671 bulkreq.ubuffer, &done);
672 else /* XFS_IOC_FSBULKSTAT */
673 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
674 sizeof(xfs_bstat_t), bulkreq.ubuffer,
680 if (bulkreq.ocount != NULL) {
681 if (copy_to_user(bulkreq.lastip, &inlast,
683 return -XFS_ERROR(EFAULT);
685 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
686 return -XFS_ERROR(EFAULT);
693 xfs_ioc_fsgeometry_v1(
697 xfs_fsop_geom_v1_t fsgeo;
700 error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3);
704 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
705 return -XFS_ERROR(EFAULT);
714 xfs_fsop_geom_t fsgeo;
717 error = xfs_fs_geometry(mp, &fsgeo, 4);
721 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
722 return -XFS_ERROR(EFAULT);
727 * Linux extended inode flags interface.
731 xfs_merge_ioc_xflags(
735 unsigned int xflags = start;
737 if (flags & FS_IMMUTABLE_FL)
738 xflags |= XFS_XFLAG_IMMUTABLE;
740 xflags &= ~XFS_XFLAG_IMMUTABLE;
741 if (flags & FS_APPEND_FL)
742 xflags |= XFS_XFLAG_APPEND;
744 xflags &= ~XFS_XFLAG_APPEND;
745 if (flags & FS_SYNC_FL)
746 xflags |= XFS_XFLAG_SYNC;
748 xflags &= ~XFS_XFLAG_SYNC;
749 if (flags & FS_NOATIME_FL)
750 xflags |= XFS_XFLAG_NOATIME;
752 xflags &= ~XFS_XFLAG_NOATIME;
753 if (flags & FS_NODUMP_FL)
754 xflags |= XFS_XFLAG_NODUMP;
756 xflags &= ~XFS_XFLAG_NODUMP;
765 unsigned int flags = 0;
767 if (di_flags & XFS_DIFLAG_IMMUTABLE)
768 flags |= FS_IMMUTABLE_FL;
769 if (di_flags & XFS_DIFLAG_APPEND)
770 flags |= FS_APPEND_FL;
771 if (di_flags & XFS_DIFLAG_SYNC)
773 if (di_flags & XFS_DIFLAG_NOATIME)
774 flags |= FS_NOATIME_FL;
775 if (di_flags & XFS_DIFLAG_NODUMP)
776 flags |= FS_NODUMP_FL;
788 memset(&fa, 0, sizeof(struct fsxattr));
790 xfs_ilock(ip, XFS_ILOCK_SHARED);
791 fa.fsx_xflags = xfs_ip2xflags(ip);
792 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
793 fa.fsx_projid = xfs_get_projid(ip);
797 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
798 fa.fsx_nextents = ip->i_afp->if_bytes /
799 sizeof(xfs_bmbt_rec_t);
801 fa.fsx_nextents = ip->i_d.di_anextents;
805 if (ip->i_df.if_flags & XFS_IFEXTENTS)
806 fa.fsx_nextents = ip->i_df.if_bytes /
807 sizeof(xfs_bmbt_rec_t);
809 fa.fsx_nextents = ip->i_d.di_nextents;
811 xfs_iunlock(ip, XFS_ILOCK_SHARED);
813 if (copy_to_user(arg, &fa, sizeof(fa)))
820 struct xfs_inode *ip,
823 unsigned int di_flags;
825 /* can't set PREALLOC this way, just preserve it */
826 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
827 if (xflags & XFS_XFLAG_IMMUTABLE)
828 di_flags |= XFS_DIFLAG_IMMUTABLE;
829 if (xflags & XFS_XFLAG_APPEND)
830 di_flags |= XFS_DIFLAG_APPEND;
831 if (xflags & XFS_XFLAG_SYNC)
832 di_flags |= XFS_DIFLAG_SYNC;
833 if (xflags & XFS_XFLAG_NOATIME)
834 di_flags |= XFS_DIFLAG_NOATIME;
835 if (xflags & XFS_XFLAG_NODUMP)
836 di_flags |= XFS_DIFLAG_NODUMP;
837 if (xflags & XFS_XFLAG_PROJINHERIT)
838 di_flags |= XFS_DIFLAG_PROJINHERIT;
839 if (xflags & XFS_XFLAG_NODEFRAG)
840 di_flags |= XFS_DIFLAG_NODEFRAG;
841 if (xflags & XFS_XFLAG_FILESTREAM)
842 di_flags |= XFS_DIFLAG_FILESTREAM;
843 if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
844 if (xflags & XFS_XFLAG_RTINHERIT)
845 di_flags |= XFS_DIFLAG_RTINHERIT;
846 if (xflags & XFS_XFLAG_NOSYMLINKS)
847 di_flags |= XFS_DIFLAG_NOSYMLINKS;
848 if (xflags & XFS_XFLAG_EXTSZINHERIT)
849 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
850 } else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) {
851 if (xflags & XFS_XFLAG_REALTIME)
852 di_flags |= XFS_DIFLAG_REALTIME;
853 if (xflags & XFS_XFLAG_EXTSIZE)
854 di_flags |= XFS_DIFLAG_EXTSIZE;
857 ip->i_d.di_flags = di_flags;
861 xfs_diflags_to_linux(
862 struct xfs_inode *ip)
864 struct inode *inode = VFS_I(ip);
865 unsigned int xflags = xfs_ip2xflags(ip);
867 if (xflags & XFS_XFLAG_IMMUTABLE)
868 inode->i_flags |= S_IMMUTABLE;
870 inode->i_flags &= ~S_IMMUTABLE;
871 if (xflags & XFS_XFLAG_APPEND)
872 inode->i_flags |= S_APPEND;
874 inode->i_flags &= ~S_APPEND;
875 if (xflags & XFS_XFLAG_SYNC)
876 inode->i_flags |= S_SYNC;
878 inode->i_flags &= ~S_SYNC;
879 if (xflags & XFS_XFLAG_NOATIME)
880 inode->i_flags |= S_NOATIME;
882 inode->i_flags &= ~S_NOATIME;
886 #define FSX_EXTSIZE 2
888 #define FSX_NONBLOCK 8
896 struct xfs_mount *mp = ip->i_mount;
897 struct xfs_trans *tp;
898 unsigned int lock_flags = 0;
899 struct xfs_dquot *udqp = NULL;
900 struct xfs_dquot *gdqp = NULL;
901 struct xfs_dquot *olddquot = NULL;
904 trace_xfs_ioctl_setattr(ip);
906 if (mp->m_flags & XFS_MOUNT_RDONLY)
907 return XFS_ERROR(EROFS);
908 if (XFS_FORCED_SHUTDOWN(mp))
909 return XFS_ERROR(EIO);
912 * Disallow 32bit project ids when projid32bit feature is not enabled.
914 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
915 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
916 return XFS_ERROR(EINVAL);
919 * If disk quotas is on, we make sure that the dquots do exist on disk,
920 * before we start any other transactions. Trying to do this later
921 * is messy. We don't care to take a readlock to look at the ids
922 * in inode here, because we can't hold it across the trans_reserve.
923 * If the IDs do change before we take the ilock, we're covered
924 * because the i_*dquot fields will get updated anyway.
926 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
927 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
928 ip->i_d.di_gid, fa->fsx_projid,
929 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
935 * For the other attributes, we acquire the inode lock and
936 * first do an error checking pass.
938 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
939 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
943 lock_flags = XFS_ILOCK_EXCL;
944 xfs_ilock(ip, lock_flags);
947 * CAP_FOWNER overrides the following restrictions:
949 * The user ID of the calling process must be equal
950 * to the file owner ID, except in cases where the
951 * CAP_FSETID capability is applicable.
953 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
954 code = XFS_ERROR(EPERM);
959 * Do a quota reservation only if projid is actually going to change.
961 if (mask & FSX_PROJID) {
962 if (XFS_IS_QUOTA_RUNNING(mp) &&
963 XFS_IS_PQUOTA_ON(mp) &&
964 xfs_get_projid(ip) != fa->fsx_projid) {
966 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
967 capable(CAP_FOWNER) ?
968 XFS_QMOPT_FORCE_RES : 0);
969 if (code) /* out of quota */
974 if (mask & FSX_EXTSIZE) {
976 * Can't change extent size if any extents are allocated.
978 if (ip->i_d.di_nextents &&
979 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
981 code = XFS_ERROR(EINVAL); /* EFBIG? */
986 * Extent size must be a multiple of the appropriate block
987 * size, if set at all.
989 if (fa->fsx_extsize != 0) {
992 if (XFS_IS_REALTIME_INODE(ip) ||
993 ((mask & FSX_XFLAGS) &&
994 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
995 size = mp->m_sb.sb_rextsize <<
996 mp->m_sb.sb_blocklog;
998 size = mp->m_sb.sb_blocksize;
1001 if (fa->fsx_extsize % size) {
1002 code = XFS_ERROR(EINVAL);
1009 if (mask & FSX_XFLAGS) {
1011 * Can't change realtime flag if any extents are allocated.
1013 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1014 (XFS_IS_REALTIME_INODE(ip)) !=
1015 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1016 code = XFS_ERROR(EINVAL); /* EFBIG? */
1021 * If realtime flag is set then must have realtime data.
1023 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1024 if ((mp->m_sb.sb_rblocks == 0) ||
1025 (mp->m_sb.sb_rextsize == 0) ||
1026 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1027 code = XFS_ERROR(EINVAL);
1033 * Can't modify an immutable/append-only file unless
1034 * we have appropriate permission.
1036 if ((ip->i_d.di_flags &
1037 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1039 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1040 !capable(CAP_LINUX_IMMUTABLE)) {
1041 code = XFS_ERROR(EPERM);
1046 xfs_trans_ijoin(tp, ip);
1049 * Change file ownership. Must be the owner or privileged.
1051 if (mask & FSX_PROJID) {
1053 * CAP_FSETID overrides the following restrictions:
1055 * The set-user-ID and set-group-ID bits of a file will be
1056 * cleared upon successful return from chown()
1058 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1059 !capable(CAP_FSETID))
1060 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1063 * Change the ownerships and register quota modifications
1064 * in the transaction.
1066 if (xfs_get_projid(ip) != fa->fsx_projid) {
1067 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1068 olddquot = xfs_qm_vop_chown(tp, ip,
1069 &ip->i_gdquot, gdqp);
1071 xfs_set_projid(ip, fa->fsx_projid);
1074 * We may have to rev the inode as well as
1075 * the superblock version number since projids didn't
1076 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1078 if (ip->i_d.di_version == 1)
1079 xfs_bump_ino_vers2(tp, ip);
1084 if (mask & FSX_EXTSIZE)
1085 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1086 if (mask & FSX_XFLAGS) {
1087 xfs_set_diflags(ip, fa->fsx_xflags);
1088 xfs_diflags_to_linux(ip);
1091 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1092 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1094 XFS_STATS_INC(xs_ig_attrchg);
1097 * If this is a synchronous mount, make sure that the
1098 * transaction goes to disk before returning to the user.
1099 * This is slightly sub-optimal in that truncates require
1100 * two sync transactions instead of one for wsync filesystems.
1101 * One for the truncate and one for the timestamps since we
1102 * don't want to change the timestamps unless we're sure the
1103 * truncate worked. Truncates are less than 1% of the laddis
1104 * mix so this probably isn't worth the trouble to optimize.
1106 if (mp->m_flags & XFS_MOUNT_WSYNC)
1107 xfs_trans_set_sync(tp);
1108 code = xfs_trans_commit(tp, 0);
1109 xfs_iunlock(ip, lock_flags);
1112 * Release any dquot(s) the inode had kept before chown.
1114 xfs_qm_dqrele(olddquot);
1115 xfs_qm_dqrele(udqp);
1116 xfs_qm_dqrele(gdqp);
1121 xfs_qm_dqrele(udqp);
1122 xfs_qm_dqrele(gdqp);
1123 xfs_trans_cancel(tp, 0);
1125 xfs_iunlock(ip, lock_flags);
1138 if (copy_from_user(&fa, arg, sizeof(fa)))
1141 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1142 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1143 mask |= FSX_NONBLOCK;
1145 return -xfs_ioctl_setattr(ip, &fa, mask);
1155 flags = xfs_di2lxflags(ip->i_d.di_flags);
1156 if (copy_to_user(arg, &flags, sizeof(flags)))
1171 if (copy_from_user(&flags, arg, sizeof(flags)))
1174 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1175 FS_NOATIME_FL | FS_NODUMP_FL | \
1180 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1181 mask |= FSX_NONBLOCK;
1182 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1184 return -xfs_ioctl_setattr(ip, &fa, mask);
1188 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1190 struct getbmap __user *base = *ap;
1192 /* copy only getbmap portion (not getbmapx) */
1193 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1194 return XFS_ERROR(EFAULT);
1196 *ap += sizeof(struct getbmap);
1202 struct xfs_inode *ip,
1207 struct getbmapx bmx;
1210 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1211 return -XFS_ERROR(EFAULT);
1213 if (bmx.bmv_count < 2)
1214 return -XFS_ERROR(EINVAL);
1216 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1217 if (ioflags & IO_INVIS)
1218 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1220 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1221 (struct getbmap *)arg+1);
1225 /* copy back header - only size of getbmap */
1226 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1227 return -XFS_ERROR(EFAULT);
1232 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1234 struct getbmapx __user *base = *ap;
1236 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1237 return XFS_ERROR(EFAULT);
1239 *ap += sizeof(struct getbmapx);
1245 struct xfs_inode *ip,
1248 struct getbmapx bmx;
1251 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1252 return -XFS_ERROR(EFAULT);
1254 if (bmx.bmv_count < 2)
1255 return -XFS_ERROR(EINVAL);
1257 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1258 return -XFS_ERROR(EINVAL);
1260 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1261 (struct getbmapx *)arg+1);
1265 /* copy back header */
1266 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1267 return -XFS_ERROR(EFAULT);
1273 * Note: some of the ioctl's return positive numbers as a
1274 * byte count indicating success, such as readlink_by_handle.
1275 * So we don't "sign flip" like most other routines. This means
1276 * true errors need to be returned as a negative value.
1284 struct inode *inode = filp->f_path.dentry->d_inode;
1285 struct xfs_inode *ip = XFS_I(inode);
1286 struct xfs_mount *mp = ip->i_mount;
1287 void __user *arg = (void __user *)p;
1291 if (filp->f_mode & FMODE_NOCMTIME)
1292 ioflags |= IO_INVIS;
1294 trace_xfs_file_ioctl(ip);
1297 case XFS_IOC_ALLOCSP:
1298 case XFS_IOC_FREESP:
1299 case XFS_IOC_RESVSP:
1300 case XFS_IOC_UNRESVSP:
1301 case XFS_IOC_ALLOCSP64:
1302 case XFS_IOC_FREESP64:
1303 case XFS_IOC_RESVSP64:
1304 case XFS_IOC_UNRESVSP64:
1305 case XFS_IOC_ZERO_RANGE: {
1308 if (copy_from_user(&bf, arg, sizeof(bf)))
1309 return -XFS_ERROR(EFAULT);
1310 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1312 case XFS_IOC_DIOINFO: {
1314 xfs_buftarg_t *target =
1315 XFS_IS_REALTIME_INODE(ip) ?
1316 mp->m_rtdev_targp : mp->m_ddev_targp;
1318 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1319 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1321 if (copy_to_user(arg, &da, sizeof(da)))
1322 return -XFS_ERROR(EFAULT);
1326 case XFS_IOC_FSBULKSTAT_SINGLE:
1327 case XFS_IOC_FSBULKSTAT:
1328 case XFS_IOC_FSINUMBERS:
1329 return xfs_ioc_bulkstat(mp, cmd, arg);
1331 case XFS_IOC_FSGEOMETRY_V1:
1332 return xfs_ioc_fsgeometry_v1(mp, arg);
1334 case XFS_IOC_FSGEOMETRY:
1335 return xfs_ioc_fsgeometry(mp, arg);
1337 case XFS_IOC_GETVERSION:
1338 return put_user(inode->i_generation, (int __user *)arg);
1340 case XFS_IOC_FSGETXATTR:
1341 return xfs_ioc_fsgetxattr(ip, 0, arg);
1342 case XFS_IOC_FSGETXATTRA:
1343 return xfs_ioc_fsgetxattr(ip, 1, arg);
1344 case XFS_IOC_FSSETXATTR:
1345 return xfs_ioc_fssetxattr(ip, filp, arg);
1346 case XFS_IOC_GETXFLAGS:
1347 return xfs_ioc_getxflags(ip, arg);
1348 case XFS_IOC_SETXFLAGS:
1349 return xfs_ioc_setxflags(ip, filp, arg);
1351 case XFS_IOC_FSSETDM: {
1352 struct fsdmidata dmi;
1354 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1355 return -XFS_ERROR(EFAULT);
1357 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1362 case XFS_IOC_GETBMAP:
1363 case XFS_IOC_GETBMAPA:
1364 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1366 case XFS_IOC_GETBMAPX:
1367 return xfs_ioc_getbmapx(ip, arg);
1369 case XFS_IOC_FD_TO_HANDLE:
1370 case XFS_IOC_PATH_TO_HANDLE:
1371 case XFS_IOC_PATH_TO_FSHANDLE: {
1372 xfs_fsop_handlereq_t hreq;
1374 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1375 return -XFS_ERROR(EFAULT);
1376 return xfs_find_handle(cmd, &hreq);
1378 case XFS_IOC_OPEN_BY_HANDLE: {
1379 xfs_fsop_handlereq_t hreq;
1381 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1382 return -XFS_ERROR(EFAULT);
1383 return xfs_open_by_handle(filp, &hreq);
1385 case XFS_IOC_FSSETDM_BY_HANDLE:
1386 return xfs_fssetdm_by_handle(filp, arg);
1388 case XFS_IOC_READLINK_BY_HANDLE: {
1389 xfs_fsop_handlereq_t hreq;
1391 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1392 return -XFS_ERROR(EFAULT);
1393 return xfs_readlink_by_handle(filp, &hreq);
1395 case XFS_IOC_ATTRLIST_BY_HANDLE:
1396 return xfs_attrlist_by_handle(filp, arg);
1398 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1399 return xfs_attrmulti_by_handle(filp, arg);
1401 case XFS_IOC_SWAPEXT: {
1402 struct xfs_swapext sxp;
1404 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1405 return -XFS_ERROR(EFAULT);
1406 error = xfs_swapext(&sxp);
1410 case XFS_IOC_FSCOUNTS: {
1411 xfs_fsop_counts_t out;
1413 error = xfs_fs_counts(mp, &out);
1417 if (copy_to_user(arg, &out, sizeof(out)))
1418 return -XFS_ERROR(EFAULT);
1422 case XFS_IOC_SET_RESBLKS: {
1423 xfs_fsop_resblks_t inout;
1426 if (!capable(CAP_SYS_ADMIN))
1429 if (mp->m_flags & XFS_MOUNT_RDONLY)
1430 return -XFS_ERROR(EROFS);
1432 if (copy_from_user(&inout, arg, sizeof(inout)))
1433 return -XFS_ERROR(EFAULT);
1435 /* input parameter is passed in resblks field of structure */
1437 error = xfs_reserve_blocks(mp, &in, &inout);
1441 if (copy_to_user(arg, &inout, sizeof(inout)))
1442 return -XFS_ERROR(EFAULT);
1446 case XFS_IOC_GET_RESBLKS: {
1447 xfs_fsop_resblks_t out;
1449 if (!capable(CAP_SYS_ADMIN))
1452 error = xfs_reserve_blocks(mp, NULL, &out);
1456 if (copy_to_user(arg, &out, sizeof(out)))
1457 return -XFS_ERROR(EFAULT);
1462 case XFS_IOC_FSGROWFSDATA: {
1463 xfs_growfs_data_t in;
1465 if (copy_from_user(&in, arg, sizeof(in)))
1466 return -XFS_ERROR(EFAULT);
1468 error = xfs_growfs_data(mp, &in);
1472 case XFS_IOC_FSGROWFSLOG: {
1473 xfs_growfs_log_t in;
1475 if (copy_from_user(&in, arg, sizeof(in)))
1476 return -XFS_ERROR(EFAULT);
1478 error = xfs_growfs_log(mp, &in);
1482 case XFS_IOC_FSGROWFSRT: {
1485 if (copy_from_user(&in, arg, sizeof(in)))
1486 return -XFS_ERROR(EFAULT);
1488 error = xfs_growfs_rt(mp, &in);
1492 case XFS_IOC_GOINGDOWN: {
1495 if (!capable(CAP_SYS_ADMIN))
1498 if (get_user(in, (__uint32_t __user *)arg))
1499 return -XFS_ERROR(EFAULT);
1501 error = xfs_fs_goingdown(mp, in);
1505 case XFS_IOC_ERROR_INJECTION: {
1506 xfs_error_injection_t in;
1508 if (!capable(CAP_SYS_ADMIN))
1511 if (copy_from_user(&in, arg, sizeof(in)))
1512 return -XFS_ERROR(EFAULT);
1514 error = xfs_errortag_add(in.errtag, mp);
1518 case XFS_IOC_ERROR_CLEARALL:
1519 if (!capable(CAP_SYS_ADMIN))
1522 error = xfs_errortag_clearall(mp, 1);