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_ioctl.h"
38 #include "xfs_btree.h"
39 #include "xfs_ialloc.h"
40 #include "xfs_rtalloc.h"
41 #include "xfs_itable.h"
42 #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"
54 #include "xfs_trace.h"
56 #include <linux/capability.h>
57 #include <linux/dcache.h>
58 #include <linux/mount.h>
59 #include <linux/namei.h>
60 #include <linux/pagemap.h>
61 #include <linux/exportfs.h>
64 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
65 * a file or fs handle.
67 * XFS_IOC_PATH_TO_FSHANDLE
68 * returns fs handle for a mount point or path within that mount point
69 * XFS_IOC_FD_TO_HANDLE
70 * returns full handle for a FD opened in user space
71 * XFS_IOC_PATH_TO_HANDLE
72 * returns full handle for a path
77 xfs_fsop_handlereq_t *hreq)
82 struct file *file = NULL;
87 if (cmd == XFS_IOC_FD_TO_HANDLE) {
88 file = fget(hreq->fd);
91 inode = file->f_path.dentry->d_inode;
93 error = user_lpath((const char __user *)hreq->path, &path);
96 inode = path.dentry->d_inode;
101 * We can only generate handles for inodes residing on a XFS filesystem,
102 * and only for regular files, directories or symbolic links.
105 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
109 if (!S_ISREG(inode->i_mode) &&
110 !S_ISDIR(inode->i_mode) &&
111 !S_ISLNK(inode->i_mode))
115 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
117 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
119 * This handle only contains an fsid, zero the rest.
121 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
122 hsize = sizeof(xfs_fsid_t);
126 lock_mode = xfs_ilock_map_shared(ip);
127 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
128 sizeof(handle.ha_fid.fid_len);
129 handle.ha_fid.fid_pad = 0;
130 handle.ha_fid.fid_gen = ip->i_d.di_gen;
131 handle.ha_fid.fid_ino = ip->i_ino;
132 xfs_iunlock_map_shared(ip, lock_mode);
134 hsize = XFS_HSIZE(handle);
138 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
139 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
145 if (cmd == XFS_IOC_FD_TO_HANDLE)
153 * No need to do permission checks on the various pathname components
154 * as the handle operations are privileged.
157 xfs_handle_acceptable(
159 struct dentry *dentry)
165 * Convert userspace handle data into a dentry.
168 xfs_handle_to_dentry(
169 struct file *parfilp,
170 void __user *uhandle,
174 struct xfs_fid64 fid;
177 * Only allow handle opens under a directory.
179 if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode))
180 return ERR_PTR(-ENOTDIR);
182 if (hlen != sizeof(xfs_handle_t))
183 return ERR_PTR(-EINVAL);
184 if (copy_from_user(&handle, uhandle, hlen))
185 return ERR_PTR(-EFAULT);
186 if (handle.ha_fid.fid_len !=
187 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
188 return ERR_PTR(-EINVAL);
190 memset(&fid, 0, sizeof(struct fid));
191 fid.ino = handle.ha_fid.fid_ino;
192 fid.gen = handle.ha_fid.fid_gen;
194 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
195 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
196 xfs_handle_acceptable, NULL);
199 STATIC struct dentry *
200 xfs_handlereq_to_dentry(
201 struct file *parfilp,
202 xfs_fsop_handlereq_t *hreq)
204 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
209 struct file *parfilp,
210 xfs_fsop_handlereq_t *hreq)
212 const struct cred *cred = current_cred();
218 struct dentry *dentry;
220 if (!capable(CAP_SYS_ADMIN))
221 return -XFS_ERROR(EPERM);
223 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
225 return PTR_ERR(dentry);
226 inode = dentry->d_inode;
228 /* Restrict xfs_open_by_handle to directories & regular files. */
229 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
230 error = -XFS_ERROR(EPERM);
234 #if BITS_PER_LONG != 32
235 hreq->oflags |= O_LARGEFILE;
238 /* Put open permission in namei format. */
239 permflag = hreq->oflags;
240 if ((permflag+1) & O_ACCMODE)
242 if (permflag & O_TRUNC)
245 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
246 (permflag & FMODE_WRITE) && IS_APPEND(inode)) {
247 error = -XFS_ERROR(EPERM);
251 if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
252 error = -XFS_ERROR(EACCES);
256 /* Can't write directories. */
257 if (S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) {
258 error = -XFS_ERROR(EISDIR);
262 fd = get_unused_fd();
268 filp = dentry_open(dentry, mntget(parfilp->f_path.mnt),
272 return PTR_ERR(filp);
275 if (inode->i_mode & S_IFREG) {
276 filp->f_flags |= O_NOATIME;
277 filp->f_mode |= FMODE_NOCMTIME;
280 fd_install(fd, filp);
289 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
290 * unused first argument.
305 if (len > (unsigned) buflen)
307 if (copy_to_user(buffer, link, len))
315 xfs_readlink_by_handle(
316 struct file *parfilp,
317 xfs_fsop_handlereq_t *hreq)
319 struct dentry *dentry;
324 if (!capable(CAP_SYS_ADMIN))
325 return -XFS_ERROR(EPERM);
327 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
329 return PTR_ERR(dentry);
331 /* Restrict this handle operation to symlinks only. */
332 if (!S_ISLNK(dentry->d_inode->i_mode)) {
333 error = -XFS_ERROR(EINVAL);
337 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
338 error = -XFS_ERROR(EFAULT);
342 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
344 error = -XFS_ERROR(ENOMEM);
348 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
351 error = do_readlink(hreq->ohandle, olen, link);
363 xfs_fssetdm_by_handle(
364 struct file *parfilp,
368 struct fsdmidata fsd;
369 xfs_fsop_setdm_handlereq_t dmhreq;
370 struct dentry *dentry;
372 if (!capable(CAP_MKNOD))
373 return -XFS_ERROR(EPERM);
374 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
375 return -XFS_ERROR(EFAULT);
377 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
379 return PTR_ERR(dentry);
381 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
382 error = -XFS_ERROR(EPERM);
386 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
387 error = -XFS_ERROR(EFAULT);
391 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
400 xfs_attrlist_by_handle(
401 struct file *parfilp,
405 attrlist_cursor_kern_t *cursor;
406 xfs_fsop_attrlist_handlereq_t al_hreq;
407 struct dentry *dentry;
410 if (!capable(CAP_SYS_ADMIN))
411 return -XFS_ERROR(EPERM);
412 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
413 return -XFS_ERROR(EFAULT);
414 if (al_hreq.buflen > XATTR_LIST_MAX)
415 return -XFS_ERROR(EINVAL);
418 * Reject flags, only allow namespaces.
420 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
421 return -XFS_ERROR(EINVAL);
423 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
425 return PTR_ERR(dentry);
427 kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL);
431 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
432 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
433 al_hreq.flags, cursor);
437 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
448 xfs_attrmulti_attr_get(
458 if (*len > XATTR_SIZE_MAX)
460 kbuf = kmalloc(*len, GFP_KERNEL);
464 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
468 if (copy_to_user(ubuf, kbuf, *len))
477 xfs_attrmulti_attr_set(
480 const char __user *ubuf,
487 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
489 if (len > XATTR_SIZE_MAX)
492 kbuf = memdup_user(ubuf, len);
494 return PTR_ERR(kbuf);
496 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
502 xfs_attrmulti_attr_remove(
507 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
509 return xfs_attr_remove(XFS_I(inode), name, flags);
513 xfs_attrmulti_by_handle(
514 struct file *parfilp,
518 xfs_attr_multiop_t *ops;
519 xfs_fsop_attrmulti_handlereq_t am_hreq;
520 struct dentry *dentry;
521 unsigned int i, size;
524 if (!capable(CAP_SYS_ADMIN))
525 return -XFS_ERROR(EPERM);
526 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
527 return -XFS_ERROR(EFAULT);
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(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(parfilp->f_path.mnt);
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(parfilp->f_path.mnt);
575 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
578 ops[i].am_error = xfs_attrmulti_attr_remove(
579 dentry->d_inode, attr_name,
581 mnt_drop_write(parfilp->f_path.mnt);
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;
630 if (ioflags & IO_INVIS)
631 attr_flags |= XFS_ATTR_DMI;
633 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
643 xfs_fsop_bulkreq_t bulkreq;
644 int count; /* # of records returned */
645 xfs_ino_t inlast; /* last inode number */
649 /* done = 1 if there are more stats to get and if bulkstat */
650 /* should be called again (unused here, but used in dmapi) */
652 if (!capable(CAP_SYS_ADMIN))
655 if (XFS_FORCED_SHUTDOWN(mp))
656 return -XFS_ERROR(EIO);
658 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
659 return -XFS_ERROR(EFAULT);
661 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
662 return -XFS_ERROR(EFAULT);
664 if ((count = bulkreq.icount) <= 0)
665 return -XFS_ERROR(EINVAL);
667 if (bulkreq.ubuffer == NULL)
668 return -XFS_ERROR(EINVAL);
670 if (cmd == XFS_IOC_FSINUMBERS)
671 error = xfs_inumbers(mp, &inlast, &count,
672 bulkreq.ubuffer, xfs_inumbers_fmt);
673 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
674 error = xfs_bulkstat_single(mp, &inlast,
675 bulkreq.ubuffer, &done);
676 else /* XFS_IOC_FSBULKSTAT */
677 error = xfs_bulkstat(mp, &inlast, &count,
678 (bulkstat_one_pf)xfs_bulkstat_one, NULL,
679 sizeof(xfs_bstat_t), bulkreq.ubuffer,
680 BULKSTAT_FG_QUICK, &done);
685 if (bulkreq.ocount != NULL) {
686 if (copy_to_user(bulkreq.lastip, &inlast,
688 return -XFS_ERROR(EFAULT);
690 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
691 return -XFS_ERROR(EFAULT);
698 xfs_ioc_fsgeometry_v1(
702 xfs_fsop_geom_v1_t fsgeo;
705 error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3);
709 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
710 return -XFS_ERROR(EFAULT);
719 xfs_fsop_geom_t fsgeo;
722 error = xfs_fs_geometry(mp, &fsgeo, 4);
726 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
727 return -XFS_ERROR(EFAULT);
732 * Linux extended inode flags interface.
736 xfs_merge_ioc_xflags(
740 unsigned int xflags = start;
742 if (flags & FS_IMMUTABLE_FL)
743 xflags |= XFS_XFLAG_IMMUTABLE;
745 xflags &= ~XFS_XFLAG_IMMUTABLE;
746 if (flags & FS_APPEND_FL)
747 xflags |= XFS_XFLAG_APPEND;
749 xflags &= ~XFS_XFLAG_APPEND;
750 if (flags & FS_SYNC_FL)
751 xflags |= XFS_XFLAG_SYNC;
753 xflags &= ~XFS_XFLAG_SYNC;
754 if (flags & FS_NOATIME_FL)
755 xflags |= XFS_XFLAG_NOATIME;
757 xflags &= ~XFS_XFLAG_NOATIME;
758 if (flags & FS_NODUMP_FL)
759 xflags |= XFS_XFLAG_NODUMP;
761 xflags &= ~XFS_XFLAG_NODUMP;
770 unsigned int flags = 0;
772 if (di_flags & XFS_DIFLAG_IMMUTABLE)
773 flags |= FS_IMMUTABLE_FL;
774 if (di_flags & XFS_DIFLAG_APPEND)
775 flags |= FS_APPEND_FL;
776 if (di_flags & XFS_DIFLAG_SYNC)
778 if (di_flags & XFS_DIFLAG_NOATIME)
779 flags |= FS_NOATIME_FL;
780 if (di_flags & XFS_DIFLAG_NODUMP)
781 flags |= FS_NODUMP_FL;
793 xfs_ilock(ip, XFS_ILOCK_SHARED);
794 fa.fsx_xflags = xfs_ip2xflags(ip);
795 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
796 fa.fsx_projid = ip->i_d.di_projid;
800 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
801 fa.fsx_nextents = ip->i_afp->if_bytes /
802 sizeof(xfs_bmbt_rec_t);
804 fa.fsx_nextents = ip->i_d.di_anextents;
808 if (ip->i_df.if_flags & XFS_IFEXTENTS)
809 fa.fsx_nextents = ip->i_df.if_bytes /
810 sizeof(xfs_bmbt_rec_t);
812 fa.fsx_nextents = ip->i_d.di_nextents;
814 xfs_iunlock(ip, XFS_ILOCK_SHARED);
816 if (copy_to_user(arg, &fa, sizeof(fa)))
823 struct xfs_inode *ip,
826 unsigned int di_flags;
828 /* can't set PREALLOC this way, just preserve it */
829 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
830 if (xflags & XFS_XFLAG_IMMUTABLE)
831 di_flags |= XFS_DIFLAG_IMMUTABLE;
832 if (xflags & XFS_XFLAG_APPEND)
833 di_flags |= XFS_DIFLAG_APPEND;
834 if (xflags & XFS_XFLAG_SYNC)
835 di_flags |= XFS_DIFLAG_SYNC;
836 if (xflags & XFS_XFLAG_NOATIME)
837 di_flags |= XFS_DIFLAG_NOATIME;
838 if (xflags & XFS_XFLAG_NODUMP)
839 di_flags |= XFS_DIFLAG_NODUMP;
840 if (xflags & XFS_XFLAG_PROJINHERIT)
841 di_flags |= XFS_DIFLAG_PROJINHERIT;
842 if (xflags & XFS_XFLAG_NODEFRAG)
843 di_flags |= XFS_DIFLAG_NODEFRAG;
844 if (xflags & XFS_XFLAG_FILESTREAM)
845 di_flags |= XFS_DIFLAG_FILESTREAM;
846 if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
847 if (xflags & XFS_XFLAG_RTINHERIT)
848 di_flags |= XFS_DIFLAG_RTINHERIT;
849 if (xflags & XFS_XFLAG_NOSYMLINKS)
850 di_flags |= XFS_DIFLAG_NOSYMLINKS;
851 if (xflags & XFS_XFLAG_EXTSZINHERIT)
852 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
853 } else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) {
854 if (xflags & XFS_XFLAG_REALTIME)
855 di_flags |= XFS_DIFLAG_REALTIME;
856 if (xflags & XFS_XFLAG_EXTSIZE)
857 di_flags |= XFS_DIFLAG_EXTSIZE;
860 ip->i_d.di_flags = di_flags;
864 xfs_diflags_to_linux(
865 struct xfs_inode *ip)
867 struct inode *inode = VFS_I(ip);
868 unsigned int xflags = xfs_ip2xflags(ip);
870 if (xflags & XFS_XFLAG_IMMUTABLE)
871 inode->i_flags |= S_IMMUTABLE;
873 inode->i_flags &= ~S_IMMUTABLE;
874 if (xflags & XFS_XFLAG_APPEND)
875 inode->i_flags |= S_APPEND;
877 inode->i_flags &= ~S_APPEND;
878 if (xflags & XFS_XFLAG_SYNC)
879 inode->i_flags |= S_SYNC;
881 inode->i_flags &= ~S_SYNC;
882 if (xflags & XFS_XFLAG_NOATIME)
883 inode->i_flags |= S_NOATIME;
885 inode->i_flags &= ~S_NOATIME;
889 #define FSX_EXTSIZE 2
891 #define FSX_NONBLOCK 8
899 struct xfs_mount *mp = ip->i_mount;
900 struct xfs_trans *tp;
901 unsigned int lock_flags = 0;
902 struct xfs_dquot *udqp = NULL;
903 struct xfs_dquot *gdqp = NULL;
904 struct xfs_dquot *olddquot = NULL;
907 xfs_itrace_entry(ip);
909 if (mp->m_flags & XFS_MOUNT_RDONLY)
910 return XFS_ERROR(EROFS);
911 if (XFS_FORCED_SHUTDOWN(mp))
912 return XFS_ERROR(EIO);
915 * If disk quotas is on, we make sure that the dquots do exist on disk,
916 * before we start any other transactions. Trying to do this later
917 * is messy. We don't care to take a readlock to look at the ids
918 * in inode here, because we can't hold it across the trans_reserve.
919 * If the IDs do change before we take the ilock, we're covered
920 * because the i_*dquot fields will get updated anyway.
922 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
923 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
924 ip->i_d.di_gid, fa->fsx_projid,
925 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
931 * For the other attributes, we acquire the inode lock and
932 * first do an error checking pass.
934 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
935 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
939 lock_flags = XFS_ILOCK_EXCL;
940 xfs_ilock(ip, lock_flags);
943 * CAP_FOWNER overrides the following restrictions:
945 * The user ID of the calling process must be equal
946 * to the file owner ID, except in cases where the
947 * CAP_FSETID capability is applicable.
949 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
950 code = XFS_ERROR(EPERM);
955 * Do a quota reservation only if projid is actually going to change.
957 if (mask & FSX_PROJID) {
958 if (XFS_IS_QUOTA_RUNNING(mp) &&
959 XFS_IS_PQUOTA_ON(mp) &&
960 ip->i_d.di_projid != fa->fsx_projid) {
962 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
963 capable(CAP_FOWNER) ?
964 XFS_QMOPT_FORCE_RES : 0);
965 if (code) /* out of quota */
970 if (mask & FSX_EXTSIZE) {
972 * Can't change extent size if any extents are allocated.
974 if (ip->i_d.di_nextents &&
975 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
977 code = XFS_ERROR(EINVAL); /* EFBIG? */
982 * Extent size must be a multiple of the appropriate block
983 * size, if set at all.
985 if (fa->fsx_extsize != 0) {
988 if (XFS_IS_REALTIME_INODE(ip) ||
989 ((mask & FSX_XFLAGS) &&
990 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
991 size = mp->m_sb.sb_rextsize <<
992 mp->m_sb.sb_blocklog;
994 size = mp->m_sb.sb_blocksize;
997 if (fa->fsx_extsize % size) {
998 code = XFS_ERROR(EINVAL);
1005 if (mask & FSX_XFLAGS) {
1007 * Can't change realtime flag if any extents are allocated.
1009 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1010 (XFS_IS_REALTIME_INODE(ip)) !=
1011 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1012 code = XFS_ERROR(EINVAL); /* EFBIG? */
1017 * If realtime flag is set then must have realtime data.
1019 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1020 if ((mp->m_sb.sb_rblocks == 0) ||
1021 (mp->m_sb.sb_rextsize == 0) ||
1022 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1023 code = XFS_ERROR(EINVAL);
1029 * Can't modify an immutable/append-only file unless
1030 * we have appropriate permission.
1032 if ((ip->i_d.di_flags &
1033 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1035 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1036 !capable(CAP_LINUX_IMMUTABLE)) {
1037 code = XFS_ERROR(EPERM);
1042 xfs_trans_ijoin(tp, ip, lock_flags);
1043 xfs_trans_ihold(tp, ip);
1046 * Change file ownership. Must be the owner or privileged.
1048 if (mask & FSX_PROJID) {
1050 * CAP_FSETID overrides the following restrictions:
1052 * The set-user-ID and set-group-ID bits of a file will be
1053 * cleared upon successful return from chown()
1055 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1056 !capable(CAP_FSETID))
1057 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1060 * Change the ownerships and register quota modifications
1061 * in the transaction.
1063 if (ip->i_d.di_projid != fa->fsx_projid) {
1064 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1065 olddquot = xfs_qm_vop_chown(tp, ip,
1066 &ip->i_gdquot, gdqp);
1068 ip->i_d.di_projid = fa->fsx_projid;
1071 * We may have to rev the inode as well as
1072 * the superblock version number since projids didn't
1073 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1075 if (ip->i_d.di_version == 1)
1076 xfs_bump_ino_vers2(tp, ip);
1081 if (mask & FSX_EXTSIZE)
1082 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1083 if (mask & FSX_XFLAGS) {
1084 xfs_set_diflags(ip, fa->fsx_xflags);
1085 xfs_diflags_to_linux(ip);
1088 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1089 xfs_ichgtime(ip, XFS_ICHGTIME_CHG);
1091 XFS_STATS_INC(xs_ig_attrchg);
1094 * If this is a synchronous mount, make sure that the
1095 * transaction goes to disk before returning to the user.
1096 * This is slightly sub-optimal in that truncates require
1097 * two sync transactions instead of one for wsync filesystems.
1098 * One for the truncate and one for the timestamps since we
1099 * don't want to change the timestamps unless we're sure the
1100 * truncate worked. Truncates are less than 1% of the laddis
1101 * mix so this probably isn't worth the trouble to optimize.
1103 if (mp->m_flags & XFS_MOUNT_WSYNC)
1104 xfs_trans_set_sync(tp);
1105 code = xfs_trans_commit(tp, 0);
1106 xfs_iunlock(ip, lock_flags);
1109 * Release any dquot(s) the inode had kept before chown.
1111 xfs_qm_dqrele(olddquot);
1112 xfs_qm_dqrele(udqp);
1113 xfs_qm_dqrele(gdqp);
1118 if (DM_EVENT_ENABLED(ip, DM_EVENT_ATTRIBUTE)) {
1119 XFS_SEND_NAMESP(mp, DM_EVENT_ATTRIBUTE, ip, DM_RIGHT_NULL,
1120 NULL, DM_RIGHT_NULL, NULL, NULL, 0, 0,
1121 (mask & FSX_NONBLOCK) ? DM_FLAGS_NDELAY : 0);
1127 xfs_qm_dqrele(udqp);
1128 xfs_qm_dqrele(gdqp);
1129 xfs_trans_cancel(tp, 0);
1131 xfs_iunlock(ip, lock_flags);
1144 if (copy_from_user(&fa, arg, sizeof(fa)))
1147 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1148 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1149 mask |= FSX_NONBLOCK;
1151 return -xfs_ioctl_setattr(ip, &fa, mask);
1161 flags = xfs_di2lxflags(ip->i_d.di_flags);
1162 if (copy_to_user(arg, &flags, sizeof(flags)))
1177 if (copy_from_user(&flags, arg, sizeof(flags)))
1180 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1181 FS_NOATIME_FL | FS_NODUMP_FL | \
1186 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1187 mask |= FSX_NONBLOCK;
1188 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1190 return -xfs_ioctl_setattr(ip, &fa, mask);
1194 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1196 struct getbmap __user *base = *ap;
1198 /* copy only getbmap portion (not getbmapx) */
1199 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1200 return XFS_ERROR(EFAULT);
1202 *ap += sizeof(struct getbmap);
1208 struct xfs_inode *ip,
1213 struct getbmapx bmx;
1216 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1217 return -XFS_ERROR(EFAULT);
1219 if (bmx.bmv_count < 2)
1220 return -XFS_ERROR(EINVAL);
1222 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1223 if (ioflags & IO_INVIS)
1224 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1226 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1227 (struct getbmap *)arg+1);
1231 /* copy back header - only size of getbmap */
1232 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1233 return -XFS_ERROR(EFAULT);
1238 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1240 struct getbmapx __user *base = *ap;
1242 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1243 return XFS_ERROR(EFAULT);
1245 *ap += sizeof(struct getbmapx);
1251 struct xfs_inode *ip,
1254 struct getbmapx bmx;
1257 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1258 return -XFS_ERROR(EFAULT);
1260 if (bmx.bmv_count < 2)
1261 return -XFS_ERROR(EINVAL);
1263 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1264 return -XFS_ERROR(EINVAL);
1266 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1267 (struct getbmapx *)arg+1);
1271 /* copy back header */
1272 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1273 return -XFS_ERROR(EFAULT);
1279 * Note: some of the ioctl's return positive numbers as a
1280 * byte count indicating success, such as readlink_by_handle.
1281 * So we don't "sign flip" like most other routines. This means
1282 * true errors need to be returned as a negative value.
1290 struct inode *inode = filp->f_path.dentry->d_inode;
1291 struct xfs_inode *ip = XFS_I(inode);
1292 struct xfs_mount *mp = ip->i_mount;
1293 void __user *arg = (void __user *)p;
1297 if (filp->f_mode & FMODE_NOCMTIME)
1298 ioflags |= IO_INVIS;
1300 xfs_itrace_entry(ip);
1303 case XFS_IOC_ALLOCSP:
1304 case XFS_IOC_FREESP:
1305 case XFS_IOC_RESVSP:
1306 case XFS_IOC_UNRESVSP:
1307 case XFS_IOC_ALLOCSP64:
1308 case XFS_IOC_FREESP64:
1309 case XFS_IOC_RESVSP64:
1310 case XFS_IOC_UNRESVSP64: {
1313 if (copy_from_user(&bf, arg, sizeof(bf)))
1314 return -XFS_ERROR(EFAULT);
1315 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1317 case XFS_IOC_DIOINFO: {
1319 xfs_buftarg_t *target =
1320 XFS_IS_REALTIME_INODE(ip) ?
1321 mp->m_rtdev_targp : mp->m_ddev_targp;
1323 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1324 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1326 if (copy_to_user(arg, &da, sizeof(da)))
1327 return -XFS_ERROR(EFAULT);
1331 case XFS_IOC_FSBULKSTAT_SINGLE:
1332 case XFS_IOC_FSBULKSTAT:
1333 case XFS_IOC_FSINUMBERS:
1334 return xfs_ioc_bulkstat(mp, cmd, arg);
1336 case XFS_IOC_FSGEOMETRY_V1:
1337 return xfs_ioc_fsgeometry_v1(mp, arg);
1339 case XFS_IOC_FSGEOMETRY:
1340 return xfs_ioc_fsgeometry(mp, arg);
1342 case XFS_IOC_GETVERSION:
1343 return put_user(inode->i_generation, (int __user *)arg);
1345 case XFS_IOC_FSGETXATTR:
1346 return xfs_ioc_fsgetxattr(ip, 0, arg);
1347 case XFS_IOC_FSGETXATTRA:
1348 return xfs_ioc_fsgetxattr(ip, 1, arg);
1349 case XFS_IOC_FSSETXATTR:
1350 return xfs_ioc_fssetxattr(ip, filp, arg);
1351 case XFS_IOC_GETXFLAGS:
1352 return xfs_ioc_getxflags(ip, arg);
1353 case XFS_IOC_SETXFLAGS:
1354 return xfs_ioc_setxflags(ip, filp, arg);
1356 case XFS_IOC_FSSETDM: {
1357 struct fsdmidata dmi;
1359 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1360 return -XFS_ERROR(EFAULT);
1362 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1367 case XFS_IOC_GETBMAP:
1368 case XFS_IOC_GETBMAPA:
1369 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1371 case XFS_IOC_GETBMAPX:
1372 return xfs_ioc_getbmapx(ip, arg);
1374 case XFS_IOC_FD_TO_HANDLE:
1375 case XFS_IOC_PATH_TO_HANDLE:
1376 case XFS_IOC_PATH_TO_FSHANDLE: {
1377 xfs_fsop_handlereq_t hreq;
1379 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1380 return -XFS_ERROR(EFAULT);
1381 return xfs_find_handle(cmd, &hreq);
1383 case XFS_IOC_OPEN_BY_HANDLE: {
1384 xfs_fsop_handlereq_t hreq;
1386 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1387 return -XFS_ERROR(EFAULT);
1388 return xfs_open_by_handle(filp, &hreq);
1390 case XFS_IOC_FSSETDM_BY_HANDLE:
1391 return xfs_fssetdm_by_handle(filp, arg);
1393 case XFS_IOC_READLINK_BY_HANDLE: {
1394 xfs_fsop_handlereq_t hreq;
1396 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1397 return -XFS_ERROR(EFAULT);
1398 return xfs_readlink_by_handle(filp, &hreq);
1400 case XFS_IOC_ATTRLIST_BY_HANDLE:
1401 return xfs_attrlist_by_handle(filp, arg);
1403 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1404 return xfs_attrmulti_by_handle(filp, arg);
1406 case XFS_IOC_SWAPEXT: {
1407 struct xfs_swapext sxp;
1409 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1410 return -XFS_ERROR(EFAULT);
1411 error = xfs_swapext(&sxp);
1415 case XFS_IOC_FSCOUNTS: {
1416 xfs_fsop_counts_t out;
1418 error = xfs_fs_counts(mp, &out);
1422 if (copy_to_user(arg, &out, sizeof(out)))
1423 return -XFS_ERROR(EFAULT);
1427 case XFS_IOC_SET_RESBLKS: {
1428 xfs_fsop_resblks_t inout;
1431 if (!capable(CAP_SYS_ADMIN))
1434 if (copy_from_user(&inout, arg, sizeof(inout)))
1435 return -XFS_ERROR(EFAULT);
1437 /* input parameter is passed in resblks field of structure */
1439 error = xfs_reserve_blocks(mp, &in, &inout);
1443 if (copy_to_user(arg, &inout, sizeof(inout)))
1444 return -XFS_ERROR(EFAULT);
1448 case XFS_IOC_GET_RESBLKS: {
1449 xfs_fsop_resblks_t out;
1451 if (!capable(CAP_SYS_ADMIN))
1454 error = xfs_reserve_blocks(mp, NULL, &out);
1458 if (copy_to_user(arg, &out, sizeof(out)))
1459 return -XFS_ERROR(EFAULT);
1464 case XFS_IOC_FSGROWFSDATA: {
1465 xfs_growfs_data_t in;
1467 if (copy_from_user(&in, arg, sizeof(in)))
1468 return -XFS_ERROR(EFAULT);
1470 error = xfs_growfs_data(mp, &in);
1474 case XFS_IOC_FSGROWFSLOG: {
1475 xfs_growfs_log_t in;
1477 if (copy_from_user(&in, arg, sizeof(in)))
1478 return -XFS_ERROR(EFAULT);
1480 error = xfs_growfs_log(mp, &in);
1484 case XFS_IOC_FSGROWFSRT: {
1487 if (copy_from_user(&in, arg, sizeof(in)))
1488 return -XFS_ERROR(EFAULT);
1490 error = xfs_growfs_rt(mp, &in);
1494 case XFS_IOC_GOINGDOWN: {
1497 if (!capable(CAP_SYS_ADMIN))
1500 if (get_user(in, (__uint32_t __user *)arg))
1501 return -XFS_ERROR(EFAULT);
1503 error = xfs_fs_goingdown(mp, in);
1507 case XFS_IOC_ERROR_INJECTION: {
1508 xfs_error_injection_t in;
1510 if (!capable(CAP_SYS_ADMIN))
1513 if (copy_from_user(&in, arg, sizeof(in)))
1514 return -XFS_ERROR(EFAULT);
1516 error = xfs_errortag_add(in.errtag, mp);
1520 case XFS_IOC_ERROR_CLEARALL:
1521 if (!capable(CAP_SYS_ADMIN))
1524 error = xfs_errortag_clearall(mp, 1);