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_discard.h"
43 #include "xfs_quota.h"
44 #include "xfs_inode_item.h"
45 #include "xfs_export.h"
46 #include "xfs_trace.h"
48 #include <linux/capability.h>
49 #include <linux/dcache.h>
50 #include <linux/mount.h>
51 #include <linux/namei.h>
52 #include <linux/pagemap.h>
53 #include <linux/slab.h>
54 #include <linux/exportfs.h>
57 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
58 * a file or fs handle.
60 * XFS_IOC_PATH_TO_FSHANDLE
61 * returns fs handle for a mount point or path within that mount point
62 * XFS_IOC_FD_TO_HANDLE
63 * returns full handle for a FD opened in user space
64 * XFS_IOC_PATH_TO_HANDLE
65 * returns full handle for a path
70 xfs_fsop_handlereq_t *hreq)
75 struct file *file = NULL;
80 if (cmd == XFS_IOC_FD_TO_HANDLE) {
81 file = fget(hreq->fd);
84 inode = file->f_path.dentry->d_inode;
86 error = user_lpath((const char __user *)hreq->path, &path);
89 inode = path.dentry->d_inode;
94 * We can only generate handles for inodes residing on a XFS filesystem,
95 * and only for regular files, directories or symbolic links.
98 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
102 if (!S_ISREG(inode->i_mode) &&
103 !S_ISDIR(inode->i_mode) &&
104 !S_ISLNK(inode->i_mode))
108 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
110 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
112 * This handle only contains an fsid, zero the rest.
114 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
115 hsize = sizeof(xfs_fsid_t);
119 lock_mode = xfs_ilock_map_shared(ip);
120 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
121 sizeof(handle.ha_fid.fid_len);
122 handle.ha_fid.fid_pad = 0;
123 handle.ha_fid.fid_gen = ip->i_d.di_gen;
124 handle.ha_fid.fid_ino = ip->i_ino;
125 xfs_iunlock_map_shared(ip, lock_mode);
127 hsize = XFS_HSIZE(handle);
131 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
132 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
138 if (cmd == XFS_IOC_FD_TO_HANDLE)
146 * No need to do permission checks on the various pathname components
147 * as the handle operations are privileged.
150 xfs_handle_acceptable(
152 struct dentry *dentry)
158 * Convert userspace handle data into a dentry.
161 xfs_handle_to_dentry(
162 struct file *parfilp,
163 void __user *uhandle,
167 struct xfs_fid64 fid;
170 * Only allow handle opens under a directory.
172 if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode))
173 return ERR_PTR(-ENOTDIR);
175 if (hlen != sizeof(xfs_handle_t))
176 return ERR_PTR(-EINVAL);
177 if (copy_from_user(&handle, uhandle, hlen))
178 return ERR_PTR(-EFAULT);
179 if (handle.ha_fid.fid_len !=
180 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
181 return ERR_PTR(-EINVAL);
183 memset(&fid, 0, sizeof(struct fid));
184 fid.ino = handle.ha_fid.fid_ino;
185 fid.gen = handle.ha_fid.fid_gen;
187 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
188 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
189 xfs_handle_acceptable, NULL);
192 STATIC struct dentry *
193 xfs_handlereq_to_dentry(
194 struct file *parfilp,
195 xfs_fsop_handlereq_t *hreq)
197 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
202 struct file *parfilp,
203 xfs_fsop_handlereq_t *hreq)
205 const struct cred *cred = current_cred();
211 struct dentry *dentry;
214 if (!capable(CAP_SYS_ADMIN))
215 return -XFS_ERROR(EPERM);
217 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
219 return PTR_ERR(dentry);
220 inode = dentry->d_inode;
222 /* Restrict xfs_open_by_handle to directories & regular files. */
223 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
224 error = -XFS_ERROR(EPERM);
228 #if BITS_PER_LONG != 32
229 hreq->oflags |= O_LARGEFILE;
232 permflag = hreq->oflags;
233 fmode = OPEN_FMODE(permflag);
234 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
235 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
236 error = -XFS_ERROR(EPERM);
240 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
241 error = -XFS_ERROR(EACCES);
245 /* Can't write directories. */
246 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
247 error = -XFS_ERROR(EISDIR);
251 fd = get_unused_fd();
257 filp = dentry_open(dentry, mntget(parfilp->f_path.mnt),
261 return PTR_ERR(filp);
264 if (S_ISREG(inode->i_mode)) {
265 filp->f_flags |= O_NOATIME;
266 filp->f_mode |= FMODE_NOCMTIME;
269 fd_install(fd, filp);
278 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
279 * unused first argument.
294 if (len > (unsigned) buflen)
296 if (copy_to_user(buffer, link, len))
304 xfs_readlink_by_handle(
305 struct file *parfilp,
306 xfs_fsop_handlereq_t *hreq)
308 struct dentry *dentry;
313 if (!capable(CAP_SYS_ADMIN))
314 return -XFS_ERROR(EPERM);
316 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
318 return PTR_ERR(dentry);
320 /* Restrict this handle operation to symlinks only. */
321 if (!S_ISLNK(dentry->d_inode->i_mode)) {
322 error = -XFS_ERROR(EINVAL);
326 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
327 error = -XFS_ERROR(EFAULT);
331 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
333 error = -XFS_ERROR(ENOMEM);
337 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
340 error = do_readlink(hreq->ohandle, olen, link);
352 xfs_fssetdm_by_handle(
353 struct file *parfilp,
357 struct fsdmidata fsd;
358 xfs_fsop_setdm_handlereq_t dmhreq;
359 struct dentry *dentry;
361 if (!capable(CAP_MKNOD))
362 return -XFS_ERROR(EPERM);
363 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
364 return -XFS_ERROR(EFAULT);
366 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
368 return PTR_ERR(dentry);
370 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
371 error = -XFS_ERROR(EPERM);
375 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
376 error = -XFS_ERROR(EFAULT);
380 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
389 xfs_attrlist_by_handle(
390 struct file *parfilp,
394 attrlist_cursor_kern_t *cursor;
395 xfs_fsop_attrlist_handlereq_t al_hreq;
396 struct dentry *dentry;
399 if (!capable(CAP_SYS_ADMIN))
400 return -XFS_ERROR(EPERM);
401 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
402 return -XFS_ERROR(EFAULT);
403 if (al_hreq.buflen > XATTR_LIST_MAX)
404 return -XFS_ERROR(EINVAL);
407 * Reject flags, only allow namespaces.
409 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
410 return -XFS_ERROR(EINVAL);
412 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
414 return PTR_ERR(dentry);
416 kbuf = kzalloc(al_hreq.buflen, GFP_KERNEL);
420 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
421 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
422 al_hreq.flags, cursor);
426 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
437 xfs_attrmulti_attr_get(
440 unsigned char __user *ubuf,
447 if (*len > XATTR_SIZE_MAX)
449 kbuf = kmem_zalloc(*len, KM_SLEEP | KM_MAYFAIL);
451 kbuf = kmem_zalloc_large(*len);
456 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
460 if (copy_to_user(ubuf, kbuf, *len))
464 if (is_vmalloc_addr(kbuf))
465 kmem_free_large(kbuf);
472 xfs_attrmulti_attr_set(
475 const unsigned char __user *ubuf,
482 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
484 if (len > XATTR_SIZE_MAX)
487 kbuf = memdup_user(ubuf, len);
489 return PTR_ERR(kbuf);
491 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
497 xfs_attrmulti_attr_remove(
502 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
504 return xfs_attr_remove(XFS_I(inode), name, flags);
508 xfs_attrmulti_by_handle(
509 struct file *parfilp,
513 xfs_attr_multiop_t *ops;
514 xfs_fsop_attrmulti_handlereq_t am_hreq;
515 struct dentry *dentry;
516 unsigned int i, size;
517 unsigned char *attr_name;
519 if (!capable(CAP_SYS_ADMIN))
520 return -XFS_ERROR(EPERM);
521 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
522 return -XFS_ERROR(EFAULT);
525 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
528 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
530 return PTR_ERR(dentry);
533 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
534 if (!size || size > 16 * PAGE_SIZE)
537 ops = memdup_user(am_hreq.ops, size);
539 error = PTR_ERR(ops);
543 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
548 for (i = 0; i < am_hreq.opcount; i++) {
549 ops[i].am_error = strncpy_from_user((char *)attr_name,
550 ops[i].am_attrname, MAXNAMELEN);
551 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
553 if (ops[i].am_error < 0)
556 switch (ops[i].am_opcode) {
558 ops[i].am_error = xfs_attrmulti_attr_get(
559 dentry->d_inode, attr_name,
560 ops[i].am_attrvalue, &ops[i].am_length,
564 ops[i].am_error = mnt_want_write_file(parfilp);
567 ops[i].am_error = xfs_attrmulti_attr_set(
568 dentry->d_inode, attr_name,
569 ops[i].am_attrvalue, ops[i].am_length,
571 mnt_drop_write_file(parfilp);
574 ops[i].am_error = mnt_want_write_file(parfilp);
577 ops[i].am_error = xfs_attrmulti_attr_remove(
578 dentry->d_inode, attr_name,
580 mnt_drop_write_file(parfilp);
583 ops[i].am_error = EINVAL;
587 if (copy_to_user(am_hreq.ops, ops, size))
588 error = XFS_ERROR(EFAULT);
600 struct xfs_inode *ip,
611 * Only allow the sys admin to reserve space unless
612 * unwritten extents are enabled.
614 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
615 !capable(CAP_SYS_ADMIN))
616 return -XFS_ERROR(EPERM);
618 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
619 return -XFS_ERROR(EPERM);
621 if (!(filp->f_mode & FMODE_WRITE))
622 return -XFS_ERROR(EBADF);
624 if (!S_ISREG(inode->i_mode))
625 return -XFS_ERROR(EINVAL);
627 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
628 attr_flags |= XFS_ATTR_NONBLOCK;
630 if (filp->f_flags & O_DSYNC)
631 attr_flags |= XFS_ATTR_SYNC;
633 if (ioflags & IO_INVIS)
634 attr_flags |= XFS_ATTR_DMI;
636 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
646 xfs_fsop_bulkreq_t bulkreq;
647 int count; /* # of records returned */
648 xfs_ino_t inlast; /* last inode number */
652 /* done = 1 if there are more stats to get and if bulkstat */
653 /* should be called again (unused here, but used in dmapi) */
655 if (!capable(CAP_SYS_ADMIN))
658 if (XFS_FORCED_SHUTDOWN(mp))
659 return -XFS_ERROR(EIO);
661 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
662 return -XFS_ERROR(EFAULT);
664 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
665 return -XFS_ERROR(EFAULT);
667 if ((count = bulkreq.icount) <= 0)
668 return -XFS_ERROR(EINVAL);
670 if (bulkreq.ubuffer == NULL)
671 return -XFS_ERROR(EINVAL);
673 if (cmd == XFS_IOC_FSINUMBERS)
674 error = xfs_inumbers(mp, &inlast, &count,
675 bulkreq.ubuffer, xfs_inumbers_fmt);
676 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
677 error = xfs_bulkstat_single(mp, &inlast,
678 bulkreq.ubuffer, &done);
679 else /* XFS_IOC_FSBULKSTAT */
680 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
681 sizeof(xfs_bstat_t), bulkreq.ubuffer,
687 if (bulkreq.ocount != NULL) {
688 if (copy_to_user(bulkreq.lastip, &inlast,
690 return -XFS_ERROR(EFAULT);
692 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
693 return -XFS_ERROR(EFAULT);
700 xfs_ioc_fsgeometry_v1(
704 xfs_fsop_geom_t fsgeo;
707 error = xfs_fs_geometry(mp, &fsgeo, 3);
712 * Caller should have passed an argument of type
713 * xfs_fsop_geom_v1_t. This is a proper subset of the
714 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
716 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
717 return -XFS_ERROR(EFAULT);
726 xfs_fsop_geom_t fsgeo;
729 error = xfs_fs_geometry(mp, &fsgeo, 4);
733 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
734 return -XFS_ERROR(EFAULT);
739 * Linux extended inode flags interface.
743 xfs_merge_ioc_xflags(
747 unsigned int xflags = start;
749 if (flags & FS_IMMUTABLE_FL)
750 xflags |= XFS_XFLAG_IMMUTABLE;
752 xflags &= ~XFS_XFLAG_IMMUTABLE;
753 if (flags & FS_APPEND_FL)
754 xflags |= XFS_XFLAG_APPEND;
756 xflags &= ~XFS_XFLAG_APPEND;
757 if (flags & FS_SYNC_FL)
758 xflags |= XFS_XFLAG_SYNC;
760 xflags &= ~XFS_XFLAG_SYNC;
761 if (flags & FS_NOATIME_FL)
762 xflags |= XFS_XFLAG_NOATIME;
764 xflags &= ~XFS_XFLAG_NOATIME;
765 if (flags & FS_NODUMP_FL)
766 xflags |= XFS_XFLAG_NODUMP;
768 xflags &= ~XFS_XFLAG_NODUMP;
777 unsigned int flags = 0;
779 if (di_flags & XFS_DIFLAG_IMMUTABLE)
780 flags |= FS_IMMUTABLE_FL;
781 if (di_flags & XFS_DIFLAG_APPEND)
782 flags |= FS_APPEND_FL;
783 if (di_flags & XFS_DIFLAG_SYNC)
785 if (di_flags & XFS_DIFLAG_NOATIME)
786 flags |= FS_NOATIME_FL;
787 if (di_flags & XFS_DIFLAG_NODUMP)
788 flags |= FS_NODUMP_FL;
800 memset(&fa, 0, sizeof(struct fsxattr));
802 xfs_ilock(ip, XFS_ILOCK_SHARED);
803 fa.fsx_xflags = xfs_ip2xflags(ip);
804 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
805 fa.fsx_projid = xfs_get_projid(ip);
809 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
810 fa.fsx_nextents = ip->i_afp->if_bytes /
811 sizeof(xfs_bmbt_rec_t);
813 fa.fsx_nextents = ip->i_d.di_anextents;
817 if (ip->i_df.if_flags & XFS_IFEXTENTS)
818 fa.fsx_nextents = ip->i_df.if_bytes /
819 sizeof(xfs_bmbt_rec_t);
821 fa.fsx_nextents = ip->i_d.di_nextents;
823 xfs_iunlock(ip, XFS_ILOCK_SHARED);
825 if (copy_to_user(arg, &fa, sizeof(fa)))
832 struct xfs_inode *ip,
835 unsigned int di_flags;
837 /* can't set PREALLOC this way, just preserve it */
838 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
839 if (xflags & XFS_XFLAG_IMMUTABLE)
840 di_flags |= XFS_DIFLAG_IMMUTABLE;
841 if (xflags & XFS_XFLAG_APPEND)
842 di_flags |= XFS_DIFLAG_APPEND;
843 if (xflags & XFS_XFLAG_SYNC)
844 di_flags |= XFS_DIFLAG_SYNC;
845 if (xflags & XFS_XFLAG_NOATIME)
846 di_flags |= XFS_DIFLAG_NOATIME;
847 if (xflags & XFS_XFLAG_NODUMP)
848 di_flags |= XFS_DIFLAG_NODUMP;
849 if (xflags & XFS_XFLAG_PROJINHERIT)
850 di_flags |= XFS_DIFLAG_PROJINHERIT;
851 if (xflags & XFS_XFLAG_NODEFRAG)
852 di_flags |= XFS_DIFLAG_NODEFRAG;
853 if (xflags & XFS_XFLAG_FILESTREAM)
854 di_flags |= XFS_DIFLAG_FILESTREAM;
855 if (S_ISDIR(ip->i_d.di_mode)) {
856 if (xflags & XFS_XFLAG_RTINHERIT)
857 di_flags |= XFS_DIFLAG_RTINHERIT;
858 if (xflags & XFS_XFLAG_NOSYMLINKS)
859 di_flags |= XFS_DIFLAG_NOSYMLINKS;
860 if (xflags & XFS_XFLAG_EXTSZINHERIT)
861 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
862 } else if (S_ISREG(ip->i_d.di_mode)) {
863 if (xflags & XFS_XFLAG_REALTIME)
864 di_flags |= XFS_DIFLAG_REALTIME;
865 if (xflags & XFS_XFLAG_EXTSIZE)
866 di_flags |= XFS_DIFLAG_EXTSIZE;
869 ip->i_d.di_flags = di_flags;
873 xfs_diflags_to_linux(
874 struct xfs_inode *ip)
876 struct inode *inode = VFS_I(ip);
877 unsigned int xflags = xfs_ip2xflags(ip);
879 if (xflags & XFS_XFLAG_IMMUTABLE)
880 inode->i_flags |= S_IMMUTABLE;
882 inode->i_flags &= ~S_IMMUTABLE;
883 if (xflags & XFS_XFLAG_APPEND)
884 inode->i_flags |= S_APPEND;
886 inode->i_flags &= ~S_APPEND;
887 if (xflags & XFS_XFLAG_SYNC)
888 inode->i_flags |= S_SYNC;
890 inode->i_flags &= ~S_SYNC;
891 if (xflags & XFS_XFLAG_NOATIME)
892 inode->i_flags |= S_NOATIME;
894 inode->i_flags &= ~S_NOATIME;
898 #define FSX_EXTSIZE 2
900 #define FSX_NONBLOCK 8
908 struct xfs_mount *mp = ip->i_mount;
909 struct xfs_trans *tp;
910 unsigned int lock_flags = 0;
911 struct xfs_dquot *udqp = NULL;
912 struct xfs_dquot *gdqp = NULL;
913 struct xfs_dquot *olddquot = NULL;
916 trace_xfs_ioctl_setattr(ip);
918 if (mp->m_flags & XFS_MOUNT_RDONLY)
919 return XFS_ERROR(EROFS);
920 if (XFS_FORCED_SHUTDOWN(mp))
921 return XFS_ERROR(EIO);
924 * Disallow 32bit project ids when projid32bit feature is not enabled.
926 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
927 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
928 return XFS_ERROR(EINVAL);
931 * If disk quotas is on, we make sure that the dquots do exist on disk,
932 * before we start any other transactions. Trying to do this later
933 * is messy. We don't care to take a readlock to look at the ids
934 * in inode here, because we can't hold it across the trans_reserve.
935 * If the IDs do change before we take the ilock, we're covered
936 * because the i_*dquot fields will get updated anyway.
938 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
939 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
940 ip->i_d.di_gid, fa->fsx_projid,
941 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
947 * For the other attributes, we acquire the inode lock and
948 * first do an error checking pass.
950 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
951 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
955 lock_flags = XFS_ILOCK_EXCL;
956 xfs_ilock(ip, lock_flags);
959 * CAP_FOWNER overrides the following restrictions:
961 * The user ID of the calling process must be equal
962 * to the file owner ID, except in cases where the
963 * CAP_FSETID capability is applicable.
965 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
966 code = XFS_ERROR(EPERM);
971 * Do a quota reservation only if projid is actually going to change.
973 if (mask & FSX_PROJID) {
974 if (XFS_IS_QUOTA_RUNNING(mp) &&
975 XFS_IS_PQUOTA_ON(mp) &&
976 xfs_get_projid(ip) != fa->fsx_projid) {
978 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
979 capable(CAP_FOWNER) ?
980 XFS_QMOPT_FORCE_RES : 0);
981 if (code) /* out of quota */
986 if (mask & FSX_EXTSIZE) {
988 * Can't change extent size if any extents are allocated.
990 if (ip->i_d.di_nextents &&
991 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
993 code = XFS_ERROR(EINVAL); /* EFBIG? */
998 * Extent size must be a multiple of the appropriate block
999 * size, if set at all. It must also be smaller than the
1000 * maximum extent size supported by the filesystem.
1002 * Also, for non-realtime files, limit the extent size hint to
1003 * half the size of the AGs in the filesystem so alignment
1004 * doesn't result in extents larger than an AG.
1006 if (fa->fsx_extsize != 0) {
1008 xfs_fsblock_t extsize_fsb;
1010 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1011 if (extsize_fsb > MAXEXTLEN) {
1012 code = XFS_ERROR(EINVAL);
1016 if (XFS_IS_REALTIME_INODE(ip) ||
1017 ((mask & FSX_XFLAGS) &&
1018 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1019 size = mp->m_sb.sb_rextsize <<
1020 mp->m_sb.sb_blocklog;
1022 size = mp->m_sb.sb_blocksize;
1023 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1024 code = XFS_ERROR(EINVAL);
1029 if (fa->fsx_extsize % size) {
1030 code = XFS_ERROR(EINVAL);
1037 if (mask & FSX_XFLAGS) {
1039 * Can't change realtime flag if any extents are allocated.
1041 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1042 (XFS_IS_REALTIME_INODE(ip)) !=
1043 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1044 code = XFS_ERROR(EINVAL); /* EFBIG? */
1049 * If realtime flag is set then must have realtime data.
1051 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1052 if ((mp->m_sb.sb_rblocks == 0) ||
1053 (mp->m_sb.sb_rextsize == 0) ||
1054 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1055 code = XFS_ERROR(EINVAL);
1061 * Can't modify an immutable/append-only file unless
1062 * we have appropriate permission.
1064 if ((ip->i_d.di_flags &
1065 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1067 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1068 !capable(CAP_LINUX_IMMUTABLE)) {
1069 code = XFS_ERROR(EPERM);
1074 xfs_trans_ijoin(tp, ip, 0);
1077 * Change file ownership. Must be the owner or privileged.
1079 if (mask & FSX_PROJID) {
1081 * CAP_FSETID overrides the following restrictions:
1083 * The set-user-ID and set-group-ID bits of a file will be
1084 * cleared upon successful return from chown()
1086 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1087 !capable(CAP_FSETID))
1088 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1091 * Change the ownerships and register quota modifications
1092 * in the transaction.
1094 if (xfs_get_projid(ip) != fa->fsx_projid) {
1095 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1096 olddquot = xfs_qm_vop_chown(tp, ip,
1097 &ip->i_gdquot, gdqp);
1099 xfs_set_projid(ip, fa->fsx_projid);
1102 * We may have to rev the inode as well as
1103 * the superblock version number since projids didn't
1104 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1106 if (ip->i_d.di_version == 1)
1107 xfs_bump_ino_vers2(tp, ip);
1112 if (mask & FSX_EXTSIZE)
1113 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1114 if (mask & FSX_XFLAGS) {
1115 xfs_set_diflags(ip, fa->fsx_xflags);
1116 xfs_diflags_to_linux(ip);
1119 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1120 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1122 XFS_STATS_INC(xs_ig_attrchg);
1125 * If this is a synchronous mount, make sure that the
1126 * transaction goes to disk before returning to the user.
1127 * This is slightly sub-optimal in that truncates require
1128 * two sync transactions instead of one for wsync filesystems.
1129 * One for the truncate and one for the timestamps since we
1130 * don't want to change the timestamps unless we're sure the
1131 * truncate worked. Truncates are less than 1% of the laddis
1132 * mix so this probably isn't worth the trouble to optimize.
1134 if (mp->m_flags & XFS_MOUNT_WSYNC)
1135 xfs_trans_set_sync(tp);
1136 code = xfs_trans_commit(tp, 0);
1137 xfs_iunlock(ip, lock_flags);
1140 * Release any dquot(s) the inode had kept before chown.
1142 xfs_qm_dqrele(olddquot);
1143 xfs_qm_dqrele(udqp);
1144 xfs_qm_dqrele(gdqp);
1149 xfs_qm_dqrele(udqp);
1150 xfs_qm_dqrele(gdqp);
1151 xfs_trans_cancel(tp, 0);
1153 xfs_iunlock(ip, lock_flags);
1166 if (copy_from_user(&fa, arg, sizeof(fa)))
1169 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1170 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1171 mask |= FSX_NONBLOCK;
1173 return -xfs_ioctl_setattr(ip, &fa, mask);
1183 flags = xfs_di2lxflags(ip->i_d.di_flags);
1184 if (copy_to_user(arg, &flags, sizeof(flags)))
1199 if (copy_from_user(&flags, arg, sizeof(flags)))
1202 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1203 FS_NOATIME_FL | FS_NODUMP_FL | \
1208 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1209 mask |= FSX_NONBLOCK;
1210 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1212 return -xfs_ioctl_setattr(ip, &fa, mask);
1216 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1218 struct getbmap __user *base = *ap;
1220 /* copy only getbmap portion (not getbmapx) */
1221 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1222 return XFS_ERROR(EFAULT);
1224 *ap += sizeof(struct getbmap);
1230 struct xfs_inode *ip,
1235 struct getbmapx bmx;
1238 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1239 return -XFS_ERROR(EFAULT);
1241 if (bmx.bmv_count < 2)
1242 return -XFS_ERROR(EINVAL);
1244 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1245 if (ioflags & IO_INVIS)
1246 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1248 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1249 (struct getbmap *)arg+1);
1253 /* copy back header - only size of getbmap */
1254 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1255 return -XFS_ERROR(EFAULT);
1260 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1262 struct getbmapx __user *base = *ap;
1264 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1265 return XFS_ERROR(EFAULT);
1267 *ap += sizeof(struct getbmapx);
1273 struct xfs_inode *ip,
1276 struct getbmapx bmx;
1279 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1280 return -XFS_ERROR(EFAULT);
1282 if (bmx.bmv_count < 2)
1283 return -XFS_ERROR(EINVAL);
1285 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1286 return -XFS_ERROR(EINVAL);
1288 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1289 (struct getbmapx *)arg+1);
1293 /* copy back header */
1294 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1295 return -XFS_ERROR(EFAULT);
1301 * Note: some of the ioctl's return positive numbers as a
1302 * byte count indicating success, such as readlink_by_handle.
1303 * So we don't "sign flip" like most other routines. This means
1304 * true errors need to be returned as a negative value.
1312 struct inode *inode = filp->f_path.dentry->d_inode;
1313 struct xfs_inode *ip = XFS_I(inode);
1314 struct xfs_mount *mp = ip->i_mount;
1315 void __user *arg = (void __user *)p;
1319 if (filp->f_mode & FMODE_NOCMTIME)
1320 ioflags |= IO_INVIS;
1322 trace_xfs_file_ioctl(ip);
1326 return xfs_ioc_trim(mp, arg);
1327 case XFS_IOC_ALLOCSP:
1328 case XFS_IOC_FREESP:
1329 case XFS_IOC_RESVSP:
1330 case XFS_IOC_UNRESVSP:
1331 case XFS_IOC_ALLOCSP64:
1332 case XFS_IOC_FREESP64:
1333 case XFS_IOC_RESVSP64:
1334 case XFS_IOC_UNRESVSP64:
1335 case XFS_IOC_ZERO_RANGE: {
1338 if (copy_from_user(&bf, arg, sizeof(bf)))
1339 return -XFS_ERROR(EFAULT);
1340 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1342 case XFS_IOC_DIOINFO: {
1344 xfs_buftarg_t *target =
1345 XFS_IS_REALTIME_INODE(ip) ?
1346 mp->m_rtdev_targp : mp->m_ddev_targp;
1348 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1349 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1351 if (copy_to_user(arg, &da, sizeof(da)))
1352 return -XFS_ERROR(EFAULT);
1356 case XFS_IOC_FSBULKSTAT_SINGLE:
1357 case XFS_IOC_FSBULKSTAT:
1358 case XFS_IOC_FSINUMBERS:
1359 return xfs_ioc_bulkstat(mp, cmd, arg);
1361 case XFS_IOC_FSGEOMETRY_V1:
1362 return xfs_ioc_fsgeometry_v1(mp, arg);
1364 case XFS_IOC_FSGEOMETRY:
1365 return xfs_ioc_fsgeometry(mp, arg);
1367 case XFS_IOC_GETVERSION:
1368 return put_user(inode->i_generation, (int __user *)arg);
1370 case XFS_IOC_FSGETXATTR:
1371 return xfs_ioc_fsgetxattr(ip, 0, arg);
1372 case XFS_IOC_FSGETXATTRA:
1373 return xfs_ioc_fsgetxattr(ip, 1, arg);
1374 case XFS_IOC_FSSETXATTR:
1375 return xfs_ioc_fssetxattr(ip, filp, arg);
1376 case XFS_IOC_GETXFLAGS:
1377 return xfs_ioc_getxflags(ip, arg);
1378 case XFS_IOC_SETXFLAGS:
1379 return xfs_ioc_setxflags(ip, filp, arg);
1381 case XFS_IOC_FSSETDM: {
1382 struct fsdmidata dmi;
1384 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1385 return -XFS_ERROR(EFAULT);
1387 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1392 case XFS_IOC_GETBMAP:
1393 case XFS_IOC_GETBMAPA:
1394 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1396 case XFS_IOC_GETBMAPX:
1397 return xfs_ioc_getbmapx(ip, arg);
1399 case XFS_IOC_FD_TO_HANDLE:
1400 case XFS_IOC_PATH_TO_HANDLE:
1401 case XFS_IOC_PATH_TO_FSHANDLE: {
1402 xfs_fsop_handlereq_t hreq;
1404 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1405 return -XFS_ERROR(EFAULT);
1406 return xfs_find_handle(cmd, &hreq);
1408 case XFS_IOC_OPEN_BY_HANDLE: {
1409 xfs_fsop_handlereq_t hreq;
1411 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1412 return -XFS_ERROR(EFAULT);
1413 return xfs_open_by_handle(filp, &hreq);
1415 case XFS_IOC_FSSETDM_BY_HANDLE:
1416 return xfs_fssetdm_by_handle(filp, arg);
1418 case XFS_IOC_READLINK_BY_HANDLE: {
1419 xfs_fsop_handlereq_t hreq;
1421 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1422 return -XFS_ERROR(EFAULT);
1423 return xfs_readlink_by_handle(filp, &hreq);
1425 case XFS_IOC_ATTRLIST_BY_HANDLE:
1426 return xfs_attrlist_by_handle(filp, arg);
1428 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1429 return xfs_attrmulti_by_handle(filp, arg);
1431 case XFS_IOC_SWAPEXT: {
1432 struct xfs_swapext sxp;
1434 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1435 return -XFS_ERROR(EFAULT);
1436 error = xfs_swapext(&sxp);
1440 case XFS_IOC_FSCOUNTS: {
1441 xfs_fsop_counts_t out;
1443 error = xfs_fs_counts(mp, &out);
1447 if (copy_to_user(arg, &out, sizeof(out)))
1448 return -XFS_ERROR(EFAULT);
1452 case XFS_IOC_SET_RESBLKS: {
1453 xfs_fsop_resblks_t inout;
1456 if (!capable(CAP_SYS_ADMIN))
1459 if (mp->m_flags & XFS_MOUNT_RDONLY)
1460 return -XFS_ERROR(EROFS);
1462 if (copy_from_user(&inout, arg, sizeof(inout)))
1463 return -XFS_ERROR(EFAULT);
1465 /* input parameter is passed in resblks field of structure */
1467 error = xfs_reserve_blocks(mp, &in, &inout);
1471 if (copy_to_user(arg, &inout, sizeof(inout)))
1472 return -XFS_ERROR(EFAULT);
1476 case XFS_IOC_GET_RESBLKS: {
1477 xfs_fsop_resblks_t out;
1479 if (!capable(CAP_SYS_ADMIN))
1482 error = xfs_reserve_blocks(mp, NULL, &out);
1486 if (copy_to_user(arg, &out, sizeof(out)))
1487 return -XFS_ERROR(EFAULT);
1492 case XFS_IOC_FSGROWFSDATA: {
1493 xfs_growfs_data_t in;
1495 if (copy_from_user(&in, arg, sizeof(in)))
1496 return -XFS_ERROR(EFAULT);
1498 error = xfs_growfs_data(mp, &in);
1502 case XFS_IOC_FSGROWFSLOG: {
1503 xfs_growfs_log_t in;
1505 if (copy_from_user(&in, arg, sizeof(in)))
1506 return -XFS_ERROR(EFAULT);
1508 error = xfs_growfs_log(mp, &in);
1512 case XFS_IOC_FSGROWFSRT: {
1515 if (copy_from_user(&in, arg, sizeof(in)))
1516 return -XFS_ERROR(EFAULT);
1518 error = xfs_growfs_rt(mp, &in);
1522 case XFS_IOC_GOINGDOWN: {
1525 if (!capable(CAP_SYS_ADMIN))
1528 if (get_user(in, (__uint32_t __user *)arg))
1529 return -XFS_ERROR(EFAULT);
1531 error = xfs_fs_goingdown(mp, in);
1535 case XFS_IOC_ERROR_INJECTION: {
1536 xfs_error_injection_t in;
1538 if (!capable(CAP_SYS_ADMIN))
1541 if (copy_from_user(&in, arg, sizeof(in)))
1542 return -XFS_ERROR(EFAULT);
1544 error = xfs_errortag_add(in.errtag, mp);
1548 case XFS_IOC_ERROR_CLEARALL:
1549 if (!capable(CAP_SYS_ADMIN))
1552 error = xfs_errortag_clearall(mp, 1);