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"
27 #include "xfs_alloc.h"
28 #include "xfs_dmapi.h"
29 #include "xfs_mount.h"
30 #include "xfs_bmap_btree.h"
31 #include "xfs_alloc_btree.h"
32 #include "xfs_ialloc_btree.h"
33 #include "xfs_attr_sf.h"
34 #include "xfs_dir2_sf.h"
35 #include "xfs_dinode.h"
36 #include "xfs_inode.h"
37 #include "xfs_btree.h"
38 #include "xfs_ialloc.h"
39 #include "xfs_rtalloc.h"
40 #include "xfs_itable.h"
41 #include "xfs_error.h"
46 #include "xfs_buf_item.h"
47 #include "xfs_utils.h"
48 #include "xfs_dfrag.h"
49 #include "xfs_fsops.h"
50 #include "xfs_vnodeops.h"
51 #include "xfs_quota.h"
52 #include "xfs_inode_item.h"
53 #include "xfs_export.h"
55 #include <linux/capability.h>
56 #include <linux/dcache.h>
57 #include <linux/mount.h>
58 #include <linux/namei.h>
59 #include <linux/pagemap.h>
60 #include <linux/exportfs.h>
63 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
64 * a file or fs handle.
66 * XFS_IOC_PATH_TO_FSHANDLE
67 * returns fs handle for a mount point or path within that mount point
68 * XFS_IOC_FD_TO_HANDLE
69 * returns full handle for a FD opened in user space
70 * XFS_IOC_PATH_TO_HANDLE
71 * returns full handle for a path
76 xfs_fsop_handlereq_t *hreq)
81 struct file *file = NULL;
86 if (cmd == XFS_IOC_FD_TO_HANDLE) {
87 file = fget(hreq->fd);
90 inode = file->f_path.dentry->d_inode;
92 error = user_lpath((const char __user *)hreq->path, &path);
95 inode = path.dentry->d_inode;
100 * We can only generate handles for inodes residing on a XFS filesystem,
101 * and only for regular files, directories or symbolic links.
104 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
108 if (!S_ISREG(inode->i_mode) &&
109 !S_ISDIR(inode->i_mode) &&
110 !S_ISLNK(inode->i_mode))
114 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
116 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
118 * This handle only contains an fsid, zero the rest.
120 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
121 hsize = sizeof(xfs_fsid_t);
125 lock_mode = xfs_ilock_map_shared(ip);
126 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
127 sizeof(handle.ha_fid.fid_len);
128 handle.ha_fid.fid_pad = 0;
129 handle.ha_fid.fid_gen = ip->i_d.di_gen;
130 handle.ha_fid.fid_ino = ip->i_ino;
131 xfs_iunlock_map_shared(ip, lock_mode);
133 hsize = XFS_HSIZE(handle);
137 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
138 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
144 if (cmd == XFS_IOC_FD_TO_HANDLE)
152 * No need to do permission checks on the various pathname components
153 * as the handle operations are privileged.
156 xfs_handle_acceptable(
158 struct dentry *dentry)
164 * Convert userspace handle data into a dentry.
167 xfs_handle_to_dentry(
168 struct file *parfilp,
169 void __user *uhandle,
173 struct xfs_fid64 fid;
176 * Only allow handle opens under a directory.
178 if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode))
179 return ERR_PTR(-ENOTDIR);
181 if (hlen != sizeof(xfs_handle_t))
182 return ERR_PTR(-EINVAL);
183 if (copy_from_user(&handle, uhandle, hlen))
184 return ERR_PTR(-EFAULT);
185 if (handle.ha_fid.fid_len !=
186 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
187 return ERR_PTR(-EINVAL);
189 memset(&fid, 0, sizeof(struct fid));
190 fid.ino = handle.ha_fid.fid_ino;
191 fid.gen = handle.ha_fid.fid_gen;
193 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
194 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
195 xfs_handle_acceptable, NULL);
198 STATIC struct dentry *
199 xfs_handlereq_to_dentry(
200 struct file *parfilp,
201 xfs_fsop_handlereq_t *hreq)
203 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
208 struct file *parfilp,
209 xfs_fsop_handlereq_t *hreq)
211 const struct cred *cred = current_cred();
217 struct dentry *dentry;
219 if (!capable(CAP_SYS_ADMIN))
220 return -XFS_ERROR(EPERM);
222 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
224 return PTR_ERR(dentry);
225 inode = dentry->d_inode;
227 /* Restrict xfs_open_by_handle to directories & regular files. */
228 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
229 error = -XFS_ERROR(EPERM);
233 #if BITS_PER_LONG != 32
234 hreq->oflags |= O_LARGEFILE;
237 /* Put open permission in namei format. */
238 permflag = hreq->oflags;
239 if ((permflag+1) & O_ACCMODE)
241 if (permflag & O_TRUNC)
244 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
245 (permflag & FMODE_WRITE) && IS_APPEND(inode)) {
246 error = -XFS_ERROR(EPERM);
250 if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
251 error = -XFS_ERROR(EACCES);
255 /* Can't write directories. */
256 if (S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) {
257 error = -XFS_ERROR(EISDIR);
261 fd = get_unused_fd();
267 filp = dentry_open(dentry, mntget(parfilp->f_path.mnt),
271 return PTR_ERR(filp);
274 if (inode->i_mode & S_IFREG) {
275 filp->f_flags |= O_NOATIME;
276 filp->f_mode |= FMODE_NOCMTIME;
279 fd_install(fd, filp);
288 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
289 * unused first argument.
304 if (len > (unsigned) buflen)
306 if (copy_to_user(buffer, link, len))
314 xfs_readlink_by_handle(
315 struct file *parfilp,
316 xfs_fsop_handlereq_t *hreq)
318 struct dentry *dentry;
323 if (!capable(CAP_SYS_ADMIN))
324 return -XFS_ERROR(EPERM);
326 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
328 return PTR_ERR(dentry);
330 /* Restrict this handle operation to symlinks only. */
331 if (!S_ISLNK(dentry->d_inode->i_mode)) {
332 error = -XFS_ERROR(EINVAL);
336 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
337 error = -XFS_ERROR(EFAULT);
341 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
343 error = -XFS_ERROR(ENOMEM);
347 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
350 error = do_readlink(hreq->ohandle, olen, link);
362 xfs_fssetdm_by_handle(
363 struct file *parfilp,
367 struct fsdmidata fsd;
368 xfs_fsop_setdm_handlereq_t dmhreq;
369 struct dentry *dentry;
371 if (!capable(CAP_MKNOD))
372 return -XFS_ERROR(EPERM);
373 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
374 return -XFS_ERROR(EFAULT);
376 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
378 return PTR_ERR(dentry);
380 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
381 error = -XFS_ERROR(EPERM);
385 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
386 error = -XFS_ERROR(EFAULT);
390 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
399 xfs_attrlist_by_handle(
400 struct file *parfilp,
404 attrlist_cursor_kern_t *cursor;
405 xfs_fsop_attrlist_handlereq_t al_hreq;
406 struct dentry *dentry;
409 if (!capable(CAP_SYS_ADMIN))
410 return -XFS_ERROR(EPERM);
411 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
412 return -XFS_ERROR(EFAULT);
413 if (al_hreq.buflen > XATTR_LIST_MAX)
414 return -XFS_ERROR(EINVAL);
417 * Reject flags, only allow namespaces.
419 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
420 return -XFS_ERROR(EINVAL);
422 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
424 return PTR_ERR(dentry);
426 kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL);
430 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
431 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
432 al_hreq.flags, cursor);
436 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
447 xfs_attrmulti_attr_get(
457 if (*len > XATTR_SIZE_MAX)
459 kbuf = kmalloc(*len, GFP_KERNEL);
463 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
467 if (copy_to_user(ubuf, kbuf, *len))
476 xfs_attrmulti_attr_set(
479 const char __user *ubuf,
486 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
488 if (len > XATTR_SIZE_MAX)
491 kbuf = kmalloc(len, GFP_KERNEL);
495 if (copy_from_user(kbuf, ubuf, len))
498 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
506 xfs_attrmulti_attr_remove(
511 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
513 return xfs_attr_remove(XFS_I(inode), name, flags);
517 xfs_attrmulti_by_handle(
518 struct file *parfilp,
522 xfs_attr_multiop_t *ops;
523 xfs_fsop_attrmulti_handlereq_t am_hreq;
524 struct dentry *dentry;
525 unsigned int i, size;
528 if (!capable(CAP_SYS_ADMIN))
529 return -XFS_ERROR(EPERM);
530 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
531 return -XFS_ERROR(EFAULT);
533 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
535 return PTR_ERR(dentry);
538 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
539 if (!size || size > 16 * PAGE_SIZE)
543 ops = kmalloc(size, GFP_KERNEL);
548 if (copy_from_user(ops, am_hreq.ops, size))
551 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
557 for (i = 0; i < am_hreq.opcount; i++) {
558 ops[i].am_error = strncpy_from_user(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 dentry->d_inode, attr_name,
569 ops[i].am_attrvalue, &ops[i].am_length,
573 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
576 ops[i].am_error = xfs_attrmulti_attr_set(
577 dentry->d_inode, attr_name,
578 ops[i].am_attrvalue, ops[i].am_length,
580 mnt_drop_write(parfilp->f_path.mnt);
583 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
586 ops[i].am_error = xfs_attrmulti_attr_remove(
587 dentry->d_inode, attr_name,
589 mnt_drop_write(parfilp->f_path.mnt);
592 ops[i].am_error = EINVAL;
596 if (copy_to_user(am_hreq.ops, ops, size))
597 error = XFS_ERROR(EFAULT);
609 struct xfs_inode *ip,
620 * Only allow the sys admin to reserve space unless
621 * unwritten extents are enabled.
623 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
624 !capable(CAP_SYS_ADMIN))
625 return -XFS_ERROR(EPERM);
627 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
628 return -XFS_ERROR(EPERM);
630 if (!(filp->f_mode & FMODE_WRITE))
631 return -XFS_ERROR(EBADF);
633 if (!S_ISREG(inode->i_mode))
634 return -XFS_ERROR(EINVAL);
636 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
637 attr_flags |= XFS_ATTR_NONBLOCK;
638 if (ioflags & IO_INVIS)
639 attr_flags |= XFS_ATTR_DMI;
641 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
651 xfs_fsop_bulkreq_t bulkreq;
652 int count; /* # of records returned */
653 xfs_ino_t inlast; /* last inode number */
657 /* done = 1 if there are more stats to get and if bulkstat */
658 /* should be called again (unused here, but used in dmapi) */
660 if (!capable(CAP_SYS_ADMIN))
663 if (XFS_FORCED_SHUTDOWN(mp))
664 return -XFS_ERROR(EIO);
666 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
667 return -XFS_ERROR(EFAULT);
669 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
670 return -XFS_ERROR(EFAULT);
672 if ((count = bulkreq.icount) <= 0)
673 return -XFS_ERROR(EINVAL);
675 if (bulkreq.ubuffer == NULL)
676 return -XFS_ERROR(EINVAL);
678 if (cmd == XFS_IOC_FSINUMBERS)
679 error = xfs_inumbers(mp, &inlast, &count,
680 bulkreq.ubuffer, xfs_inumbers_fmt);
681 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
682 error = xfs_bulkstat_single(mp, &inlast,
683 bulkreq.ubuffer, &done);
684 else /* XFS_IOC_FSBULKSTAT */
685 error = xfs_bulkstat(mp, &inlast, &count,
686 (bulkstat_one_pf)xfs_bulkstat_one, NULL,
687 sizeof(xfs_bstat_t), bulkreq.ubuffer,
688 BULKSTAT_FG_QUICK, &done);
693 if (bulkreq.ocount != NULL) {
694 if (copy_to_user(bulkreq.lastip, &inlast,
696 return -XFS_ERROR(EFAULT);
698 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
699 return -XFS_ERROR(EFAULT);
706 xfs_ioc_fsgeometry_v1(
710 xfs_fsop_geom_v1_t fsgeo;
713 error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3);
717 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
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 xfs_ilock(ip, XFS_ILOCK_SHARED);
802 fa.fsx_xflags = xfs_ip2xflags(ip);
803 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
804 fa.fsx_projid = ip->i_d.di_projid;
808 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
809 fa.fsx_nextents = ip->i_afp->if_bytes /
810 sizeof(xfs_bmbt_rec_t);
812 fa.fsx_nextents = ip->i_d.di_anextents;
816 if (ip->i_df.if_flags & XFS_IFEXTENTS)
817 fa.fsx_nextents = ip->i_df.if_bytes /
818 sizeof(xfs_bmbt_rec_t);
820 fa.fsx_nextents = ip->i_d.di_nextents;
822 xfs_iunlock(ip, XFS_ILOCK_SHARED);
824 if (copy_to_user(arg, &fa, sizeof(fa)))
831 struct xfs_inode *ip,
834 unsigned int di_flags;
836 /* can't set PREALLOC this way, just preserve it */
837 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
838 if (xflags & XFS_XFLAG_IMMUTABLE)
839 di_flags |= XFS_DIFLAG_IMMUTABLE;
840 if (xflags & XFS_XFLAG_APPEND)
841 di_flags |= XFS_DIFLAG_APPEND;
842 if (xflags & XFS_XFLAG_SYNC)
843 di_flags |= XFS_DIFLAG_SYNC;
844 if (xflags & XFS_XFLAG_NOATIME)
845 di_flags |= XFS_DIFLAG_NOATIME;
846 if (xflags & XFS_XFLAG_NODUMP)
847 di_flags |= XFS_DIFLAG_NODUMP;
848 if (xflags & XFS_XFLAG_PROJINHERIT)
849 di_flags |= XFS_DIFLAG_PROJINHERIT;
850 if (xflags & XFS_XFLAG_NODEFRAG)
851 di_flags |= XFS_DIFLAG_NODEFRAG;
852 if (xflags & XFS_XFLAG_FILESTREAM)
853 di_flags |= XFS_DIFLAG_FILESTREAM;
854 if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
855 if (xflags & XFS_XFLAG_RTINHERIT)
856 di_flags |= XFS_DIFLAG_RTINHERIT;
857 if (xflags & XFS_XFLAG_NOSYMLINKS)
858 di_flags |= XFS_DIFLAG_NOSYMLINKS;
859 if (xflags & XFS_XFLAG_EXTSZINHERIT)
860 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
861 } else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) {
862 if (xflags & XFS_XFLAG_REALTIME)
863 di_flags |= XFS_DIFLAG_REALTIME;
864 if (xflags & XFS_XFLAG_EXTSIZE)
865 di_flags |= XFS_DIFLAG_EXTSIZE;
868 ip->i_d.di_flags = di_flags;
872 xfs_diflags_to_linux(
873 struct xfs_inode *ip)
875 struct inode *inode = VFS_I(ip);
876 unsigned int xflags = xfs_ip2xflags(ip);
878 if (xflags & XFS_XFLAG_IMMUTABLE)
879 inode->i_flags |= S_IMMUTABLE;
881 inode->i_flags &= ~S_IMMUTABLE;
882 if (xflags & XFS_XFLAG_APPEND)
883 inode->i_flags |= S_APPEND;
885 inode->i_flags &= ~S_APPEND;
886 if (xflags & XFS_XFLAG_SYNC)
887 inode->i_flags |= S_SYNC;
889 inode->i_flags &= ~S_SYNC;
890 if (xflags & XFS_XFLAG_NOATIME)
891 inode->i_flags |= S_NOATIME;
893 inode->i_flags &= ~S_NOATIME;
897 #define FSX_EXTSIZE 2
899 #define FSX_NONBLOCK 8
907 struct xfs_mount *mp = ip->i_mount;
908 struct xfs_trans *tp;
909 unsigned int lock_flags = 0;
910 struct xfs_dquot *udqp = NULL, *gdqp = NULL;
911 struct xfs_dquot *olddquot = NULL;
914 xfs_itrace_entry(ip);
916 if (mp->m_flags & XFS_MOUNT_RDONLY)
917 return XFS_ERROR(EROFS);
918 if (XFS_FORCED_SHUTDOWN(mp))
919 return XFS_ERROR(EIO);
922 * If disk quotas is on, we make sure that the dquots do exist on disk,
923 * before we start any other transactions. Trying to do this later
924 * is messy. We don't care to take a readlock to look at the ids
925 * in inode here, because we can't hold it across the trans_reserve.
926 * If the IDs do change before we take the ilock, we're covered
927 * because the i_*dquot fields will get updated anyway.
929 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
930 code = XFS_QM_DQVOPALLOC(mp, ip, ip->i_d.di_uid,
931 ip->i_d.di_gid, fa->fsx_projid,
932 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
938 * For the other attributes, we acquire the inode lock and
939 * first do an error checking pass.
941 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
942 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
946 lock_flags = XFS_ILOCK_EXCL;
947 xfs_ilock(ip, lock_flags);
950 * CAP_FOWNER overrides the following restrictions:
952 * The user ID of the calling process must be equal
953 * to the file owner ID, except in cases where the
954 * CAP_FSETID capability is applicable.
956 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
957 code = XFS_ERROR(EPERM);
962 * Do a quota reservation only if projid is actually going to change.
964 if (mask & FSX_PROJID) {
965 if (XFS_IS_PQUOTA_ON(mp) &&
966 ip->i_d.di_projid != fa->fsx_projid) {
968 code = XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, udqp, gdqp,
969 capable(CAP_FOWNER) ?
970 XFS_QMOPT_FORCE_RES : 0);
971 if (code) /* out of quota */
976 if (mask & FSX_EXTSIZE) {
978 * Can't change extent size if any extents are allocated.
980 if (ip->i_d.di_nextents &&
981 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
983 code = XFS_ERROR(EINVAL); /* EFBIG? */
988 * Extent size must be a multiple of the appropriate block
989 * size, if set at all.
991 if (fa->fsx_extsize != 0) {
994 if (XFS_IS_REALTIME_INODE(ip) ||
995 ((mask & FSX_XFLAGS) &&
996 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
997 size = mp->m_sb.sb_rextsize <<
998 mp->m_sb.sb_blocklog;
1000 size = mp->m_sb.sb_blocksize;
1003 if (fa->fsx_extsize % size) {
1004 code = XFS_ERROR(EINVAL);
1011 if (mask & FSX_XFLAGS) {
1013 * Can't change realtime flag if any extents are allocated.
1015 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1016 (XFS_IS_REALTIME_INODE(ip)) !=
1017 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1018 code = XFS_ERROR(EINVAL); /* EFBIG? */
1023 * If realtime flag is set then must have realtime data.
1025 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1026 if ((mp->m_sb.sb_rblocks == 0) ||
1027 (mp->m_sb.sb_rextsize == 0) ||
1028 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1029 code = XFS_ERROR(EINVAL);
1035 * Can't modify an immutable/append-only file unless
1036 * we have appropriate permission.
1038 if ((ip->i_d.di_flags &
1039 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1041 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1042 !capable(CAP_LINUX_IMMUTABLE)) {
1043 code = XFS_ERROR(EPERM);
1048 xfs_trans_ijoin(tp, ip, lock_flags);
1049 xfs_trans_ihold(tp, ip);
1052 * Change file ownership. Must be the owner or privileged.
1054 if (mask & FSX_PROJID) {
1056 * CAP_FSETID overrides the following restrictions:
1058 * The set-user-ID and set-group-ID bits of a file will be
1059 * cleared upon successful return from chown()
1061 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1062 !capable(CAP_FSETID))
1063 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1066 * Change the ownerships and register quota modifications
1067 * in the transaction.
1069 if (ip->i_d.di_projid != fa->fsx_projid) {
1070 if (XFS_IS_PQUOTA_ON(mp)) {
1071 olddquot = XFS_QM_DQVOPCHOWN(mp, tp, ip,
1072 &ip->i_gdquot, gdqp);
1074 ip->i_d.di_projid = fa->fsx_projid;
1077 * We may have to rev the inode as well as
1078 * the superblock version number since projids didn't
1079 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1081 if (ip->i_d.di_version == 1)
1082 xfs_bump_ino_vers2(tp, ip);
1087 if (mask & FSX_EXTSIZE)
1088 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1089 if (mask & FSX_XFLAGS) {
1090 xfs_set_diflags(ip, fa->fsx_xflags);
1091 xfs_diflags_to_linux(ip);
1094 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1095 xfs_ichgtime(ip, XFS_ICHGTIME_CHG);
1097 XFS_STATS_INC(xs_ig_attrchg);
1100 * If this is a synchronous mount, make sure that the
1101 * transaction goes to disk before returning to the user.
1102 * This is slightly sub-optimal in that truncates require
1103 * two sync transactions instead of one for wsync filesystems.
1104 * One for the truncate and one for the timestamps since we
1105 * don't want to change the timestamps unless we're sure the
1106 * truncate worked. Truncates are less than 1% of the laddis
1107 * mix so this probably isn't worth the trouble to optimize.
1109 if (mp->m_flags & XFS_MOUNT_WSYNC)
1110 xfs_trans_set_sync(tp);
1111 code = xfs_trans_commit(tp, 0);
1112 xfs_iunlock(ip, lock_flags);
1115 * Release any dquot(s) the inode had kept before chown.
1117 XFS_QM_DQRELE(mp, olddquot);
1118 XFS_QM_DQRELE(mp, udqp);
1119 XFS_QM_DQRELE(mp, gdqp);
1124 if (DM_EVENT_ENABLED(ip, DM_EVENT_ATTRIBUTE)) {
1125 XFS_SEND_NAMESP(mp, DM_EVENT_ATTRIBUTE, ip, DM_RIGHT_NULL,
1126 NULL, DM_RIGHT_NULL, NULL, NULL, 0, 0,
1127 (mask & FSX_NONBLOCK) ? DM_FLAGS_NDELAY : 0);
1133 XFS_QM_DQRELE(mp, udqp);
1134 XFS_QM_DQRELE(mp, gdqp);
1135 xfs_trans_cancel(tp, 0);
1137 xfs_iunlock(ip, lock_flags);
1150 if (copy_from_user(&fa, arg, sizeof(fa)))
1153 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1154 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1155 mask |= FSX_NONBLOCK;
1157 return -xfs_ioctl_setattr(ip, &fa, mask);
1167 flags = xfs_di2lxflags(ip->i_d.di_flags);
1168 if (copy_to_user(arg, &flags, sizeof(flags)))
1183 if (copy_from_user(&flags, arg, sizeof(flags)))
1186 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1187 FS_NOATIME_FL | FS_NODUMP_FL | \
1192 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1193 mask |= FSX_NONBLOCK;
1194 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1196 return -xfs_ioctl_setattr(ip, &fa, mask);
1200 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1202 struct getbmap __user *base = *ap;
1204 /* copy only getbmap portion (not getbmapx) */
1205 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1206 return XFS_ERROR(EFAULT);
1208 *ap += sizeof(struct getbmap);
1214 struct xfs_inode *ip,
1219 struct getbmapx bmx;
1222 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1223 return -XFS_ERROR(EFAULT);
1225 if (bmx.bmv_count < 2)
1226 return -XFS_ERROR(EINVAL);
1228 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1229 if (ioflags & IO_INVIS)
1230 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1232 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1233 (struct getbmap *)arg+1);
1237 /* copy back header - only size of getbmap */
1238 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1239 return -XFS_ERROR(EFAULT);
1244 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1246 struct getbmapx __user *base = *ap;
1248 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1249 return XFS_ERROR(EFAULT);
1251 *ap += sizeof(struct getbmapx);
1257 struct xfs_inode *ip,
1260 struct getbmapx bmx;
1263 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1264 return -XFS_ERROR(EFAULT);
1266 if (bmx.bmv_count < 2)
1267 return -XFS_ERROR(EINVAL);
1269 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1270 return -XFS_ERROR(EINVAL);
1272 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1273 (struct getbmapx *)arg+1);
1277 /* copy back header */
1278 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1279 return -XFS_ERROR(EFAULT);
1285 * Note: some of the ioctl's return positive numbers as a
1286 * byte count indicating success, such as readlink_by_handle.
1287 * So we don't "sign flip" like most other routines. This means
1288 * true errors need to be returned as a negative value.
1296 struct inode *inode = filp->f_path.dentry->d_inode;
1297 struct xfs_inode *ip = XFS_I(inode);
1298 struct xfs_mount *mp = ip->i_mount;
1299 void __user *arg = (void __user *)p;
1303 if (filp->f_mode & FMODE_NOCMTIME)
1304 ioflags |= IO_INVIS;
1306 xfs_itrace_entry(ip);
1309 case XFS_IOC_ALLOCSP:
1310 case XFS_IOC_FREESP:
1311 case XFS_IOC_RESVSP:
1312 case XFS_IOC_UNRESVSP:
1313 case XFS_IOC_ALLOCSP64:
1314 case XFS_IOC_FREESP64:
1315 case XFS_IOC_RESVSP64:
1316 case XFS_IOC_UNRESVSP64: {
1319 if (copy_from_user(&bf, arg, sizeof(bf)))
1320 return -XFS_ERROR(EFAULT);
1321 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1323 case XFS_IOC_DIOINFO: {
1325 xfs_buftarg_t *target =
1326 XFS_IS_REALTIME_INODE(ip) ?
1327 mp->m_rtdev_targp : mp->m_ddev_targp;
1329 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1330 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1332 if (copy_to_user(arg, &da, sizeof(da)))
1333 return -XFS_ERROR(EFAULT);
1337 case XFS_IOC_FSBULKSTAT_SINGLE:
1338 case XFS_IOC_FSBULKSTAT:
1339 case XFS_IOC_FSINUMBERS:
1340 return xfs_ioc_bulkstat(mp, cmd, arg);
1342 case XFS_IOC_FSGEOMETRY_V1:
1343 return xfs_ioc_fsgeometry_v1(mp, arg);
1345 case XFS_IOC_FSGEOMETRY:
1346 return xfs_ioc_fsgeometry(mp, arg);
1348 case XFS_IOC_GETVERSION:
1349 return put_user(inode->i_generation, (int __user *)arg);
1351 case XFS_IOC_FSGETXATTR:
1352 return xfs_ioc_fsgetxattr(ip, 0, arg);
1353 case XFS_IOC_FSGETXATTRA:
1354 return xfs_ioc_fsgetxattr(ip, 1, arg);
1355 case XFS_IOC_FSSETXATTR:
1356 return xfs_ioc_fssetxattr(ip, filp, arg);
1357 case XFS_IOC_GETXFLAGS:
1358 return xfs_ioc_getxflags(ip, arg);
1359 case XFS_IOC_SETXFLAGS:
1360 return xfs_ioc_setxflags(ip, filp, arg);
1362 case XFS_IOC_FSSETDM: {
1363 struct fsdmidata dmi;
1365 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1366 return -XFS_ERROR(EFAULT);
1368 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1373 case XFS_IOC_GETBMAP:
1374 case XFS_IOC_GETBMAPA:
1375 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1377 case XFS_IOC_GETBMAPX:
1378 return xfs_ioc_getbmapx(ip, arg);
1380 case XFS_IOC_FD_TO_HANDLE:
1381 case XFS_IOC_PATH_TO_HANDLE:
1382 case XFS_IOC_PATH_TO_FSHANDLE: {
1383 xfs_fsop_handlereq_t hreq;
1385 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1386 return -XFS_ERROR(EFAULT);
1387 return xfs_find_handle(cmd, &hreq);
1389 case XFS_IOC_OPEN_BY_HANDLE: {
1390 xfs_fsop_handlereq_t hreq;
1392 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1393 return -XFS_ERROR(EFAULT);
1394 return xfs_open_by_handle(filp, &hreq);
1396 case XFS_IOC_FSSETDM_BY_HANDLE:
1397 return xfs_fssetdm_by_handle(filp, arg);
1399 case XFS_IOC_READLINK_BY_HANDLE: {
1400 xfs_fsop_handlereq_t hreq;
1402 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1403 return -XFS_ERROR(EFAULT);
1404 return xfs_readlink_by_handle(filp, &hreq);
1406 case XFS_IOC_ATTRLIST_BY_HANDLE:
1407 return xfs_attrlist_by_handle(filp, arg);
1409 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1410 return xfs_attrmulti_by_handle(filp, arg);
1412 case XFS_IOC_SWAPEXT: {
1413 struct xfs_swapext sxp;
1415 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1416 return -XFS_ERROR(EFAULT);
1417 error = xfs_swapext(&sxp);
1421 case XFS_IOC_FSCOUNTS: {
1422 xfs_fsop_counts_t out;
1424 error = xfs_fs_counts(mp, &out);
1428 if (copy_to_user(arg, &out, sizeof(out)))
1429 return -XFS_ERROR(EFAULT);
1433 case XFS_IOC_SET_RESBLKS: {
1434 xfs_fsop_resblks_t inout;
1437 if (!capable(CAP_SYS_ADMIN))
1440 if (copy_from_user(&inout, arg, sizeof(inout)))
1441 return -XFS_ERROR(EFAULT);
1443 /* input parameter is passed in resblks field of structure */
1445 error = xfs_reserve_blocks(mp, &in, &inout);
1449 if (copy_to_user(arg, &inout, sizeof(inout)))
1450 return -XFS_ERROR(EFAULT);
1454 case XFS_IOC_GET_RESBLKS: {
1455 xfs_fsop_resblks_t out;
1457 if (!capable(CAP_SYS_ADMIN))
1460 error = xfs_reserve_blocks(mp, NULL, &out);
1464 if (copy_to_user(arg, &out, sizeof(out)))
1465 return -XFS_ERROR(EFAULT);
1470 case XFS_IOC_FSGROWFSDATA: {
1471 xfs_growfs_data_t in;
1473 if (copy_from_user(&in, arg, sizeof(in)))
1474 return -XFS_ERROR(EFAULT);
1476 error = xfs_growfs_data(mp, &in);
1480 case XFS_IOC_FSGROWFSLOG: {
1481 xfs_growfs_log_t in;
1483 if (copy_from_user(&in, arg, sizeof(in)))
1484 return -XFS_ERROR(EFAULT);
1486 error = xfs_growfs_log(mp, &in);
1490 case XFS_IOC_FSGROWFSRT: {
1493 if (copy_from_user(&in, arg, sizeof(in)))
1494 return -XFS_ERROR(EFAULT);
1496 error = xfs_growfs_rt(mp, &in);
1500 case XFS_IOC_GOINGDOWN: {
1503 if (!capable(CAP_SYS_ADMIN))
1506 if (get_user(in, (__uint32_t __user *)arg))
1507 return -XFS_ERROR(EFAULT);
1509 error = xfs_fs_goingdown(mp, in);
1513 case XFS_IOC_ERROR_INJECTION: {
1514 xfs_error_injection_t in;
1516 if (!capable(CAP_SYS_ADMIN))
1519 if (copy_from_user(&in, arg, sizeof(in)))
1520 return -XFS_ERROR(EFAULT);
1522 error = xfs_errortag_add(in.errtag, mp);
1526 case XFS_IOC_ERROR_CLEARALL:
1527 if (!capable(CAP_SYS_ADMIN))
1530 error = xfs_errortag_clearall(mp, 1);