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;
213 if (!capable(CAP_SYS_ADMIN))
214 return -XFS_ERROR(EPERM);
216 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
218 return PTR_ERR(dentry);
219 inode = dentry->d_inode;
221 /* Restrict xfs_open_by_handle to directories & regular files. */
222 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
223 error = -XFS_ERROR(EPERM);
227 #if BITS_PER_LONG != 32
228 hreq->oflags |= O_LARGEFILE;
231 /* Put open permission in namei format. */
232 permflag = hreq->oflags;
233 if ((permflag+1) & O_ACCMODE)
235 if (permflag & O_TRUNC)
238 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
239 (permflag & FMODE_WRITE) && IS_APPEND(inode)) {
240 error = -XFS_ERROR(EPERM);
244 if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
245 error = -XFS_ERROR(EACCES);
249 /* Can't write directories. */
250 if (S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) {
251 error = -XFS_ERROR(EISDIR);
255 fd = get_unused_fd();
261 filp = dentry_open(dentry, mntget(parfilp->f_path.mnt),
265 return PTR_ERR(filp);
268 if (inode->i_mode & S_IFREG) {
269 filp->f_flags |= O_NOATIME;
270 filp->f_mode |= FMODE_NOCMTIME;
273 fd_install(fd, filp);
282 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
283 * unused first argument.
298 if (len > (unsigned) buflen)
300 if (copy_to_user(buffer, link, len))
308 xfs_readlink_by_handle(
309 struct file *parfilp,
310 xfs_fsop_handlereq_t *hreq)
312 struct dentry *dentry;
317 if (!capable(CAP_SYS_ADMIN))
318 return -XFS_ERROR(EPERM);
320 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
322 return PTR_ERR(dentry);
324 /* Restrict this handle operation to symlinks only. */
325 if (!S_ISLNK(dentry->d_inode->i_mode)) {
326 error = -XFS_ERROR(EINVAL);
330 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
331 error = -XFS_ERROR(EFAULT);
335 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
337 error = -XFS_ERROR(ENOMEM);
341 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
344 error = do_readlink(hreq->ohandle, olen, link);
356 xfs_fssetdm_by_handle(
357 struct file *parfilp,
361 struct fsdmidata fsd;
362 xfs_fsop_setdm_handlereq_t dmhreq;
363 struct dentry *dentry;
365 if (!capable(CAP_MKNOD))
366 return -XFS_ERROR(EPERM);
367 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
368 return -XFS_ERROR(EFAULT);
370 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
372 return PTR_ERR(dentry);
374 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
375 error = -XFS_ERROR(EPERM);
379 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
380 error = -XFS_ERROR(EFAULT);
384 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
393 xfs_attrlist_by_handle(
394 struct file *parfilp,
398 attrlist_cursor_kern_t *cursor;
399 xfs_fsop_attrlist_handlereq_t al_hreq;
400 struct dentry *dentry;
403 if (!capable(CAP_SYS_ADMIN))
404 return -XFS_ERROR(EPERM);
405 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
406 return -XFS_ERROR(EFAULT);
407 if (al_hreq.buflen > XATTR_LIST_MAX)
408 return -XFS_ERROR(EINVAL);
411 * Reject flags, only allow namespaces.
413 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
414 return -XFS_ERROR(EINVAL);
416 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
418 return PTR_ERR(dentry);
420 kbuf = kzalloc(al_hreq.buflen, GFP_KERNEL);
424 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
425 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
426 al_hreq.flags, cursor);
430 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
441 xfs_attrmulti_attr_get(
444 unsigned char __user *ubuf,
451 if (*len > XATTR_SIZE_MAX)
453 kbuf = kmalloc(*len, GFP_KERNEL);
457 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
461 if (copy_to_user(ubuf, kbuf, *len))
470 xfs_attrmulti_attr_set(
473 const unsigned char __user *ubuf,
480 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
482 if (len > XATTR_SIZE_MAX)
485 kbuf = memdup_user(ubuf, len);
487 return PTR_ERR(kbuf);
489 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
495 xfs_attrmulti_attr_remove(
500 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
502 return xfs_attr_remove(XFS_I(inode), name, flags);
506 xfs_attrmulti_by_handle(
507 struct file *parfilp,
511 xfs_attr_multiop_t *ops;
512 xfs_fsop_attrmulti_handlereq_t am_hreq;
513 struct dentry *dentry;
514 unsigned int i, size;
515 unsigned char *attr_name;
517 if (!capable(CAP_SYS_ADMIN))
518 return -XFS_ERROR(EPERM);
519 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
520 return -XFS_ERROR(EFAULT);
523 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
526 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
528 return PTR_ERR(dentry);
531 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
532 if (!size || size > 16 * PAGE_SIZE)
535 ops = memdup_user(am_hreq.ops, size);
537 error = PTR_ERR(ops);
541 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
546 for (i = 0; i < am_hreq.opcount; i++) {
547 ops[i].am_error = strncpy_from_user((char *)attr_name,
548 ops[i].am_attrname, MAXNAMELEN);
549 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
551 if (ops[i].am_error < 0)
554 switch (ops[i].am_opcode) {
556 ops[i].am_error = xfs_attrmulti_attr_get(
557 dentry->d_inode, attr_name,
558 ops[i].am_attrvalue, &ops[i].am_length,
562 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
565 ops[i].am_error = xfs_attrmulti_attr_set(
566 dentry->d_inode, attr_name,
567 ops[i].am_attrvalue, ops[i].am_length,
569 mnt_drop_write(parfilp->f_path.mnt);
572 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
575 ops[i].am_error = xfs_attrmulti_attr_remove(
576 dentry->d_inode, attr_name,
578 mnt_drop_write(parfilp->f_path.mnt);
581 ops[i].am_error = EINVAL;
585 if (copy_to_user(am_hreq.ops, ops, size))
586 error = XFS_ERROR(EFAULT);
598 struct xfs_inode *ip,
609 * Only allow the sys admin to reserve space unless
610 * unwritten extents are enabled.
612 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
613 !capable(CAP_SYS_ADMIN))
614 return -XFS_ERROR(EPERM);
616 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
617 return -XFS_ERROR(EPERM);
619 if (!(filp->f_mode & FMODE_WRITE))
620 return -XFS_ERROR(EBADF);
622 if (!S_ISREG(inode->i_mode))
623 return -XFS_ERROR(EINVAL);
625 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
626 attr_flags |= XFS_ATTR_NONBLOCK;
627 if (ioflags & IO_INVIS)
628 attr_flags |= XFS_ATTR_DMI;
630 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
640 xfs_fsop_bulkreq_t bulkreq;
641 int count; /* # of records returned */
642 xfs_ino_t inlast; /* last inode number */
646 /* done = 1 if there are more stats to get and if bulkstat */
647 /* should be called again (unused here, but used in dmapi) */
649 if (!capable(CAP_SYS_ADMIN))
652 if (XFS_FORCED_SHUTDOWN(mp))
653 return -XFS_ERROR(EIO);
655 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
656 return -XFS_ERROR(EFAULT);
658 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
659 return -XFS_ERROR(EFAULT);
661 if ((count = bulkreq.icount) <= 0)
662 return -XFS_ERROR(EINVAL);
664 if (bulkreq.ubuffer == NULL)
665 return -XFS_ERROR(EINVAL);
667 if (cmd == XFS_IOC_FSINUMBERS)
668 error = xfs_inumbers(mp, &inlast, &count,
669 bulkreq.ubuffer, xfs_inumbers_fmt);
670 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
671 error = xfs_bulkstat_single(mp, &inlast,
672 bulkreq.ubuffer, &done);
673 else /* XFS_IOC_FSBULKSTAT */
674 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
675 sizeof(xfs_bstat_t), bulkreq.ubuffer,
681 if (bulkreq.ocount != NULL) {
682 if (copy_to_user(bulkreq.lastip, &inlast,
684 return -XFS_ERROR(EFAULT);
686 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
687 return -XFS_ERROR(EFAULT);
694 xfs_ioc_fsgeometry_v1(
698 xfs_fsop_geom_t fsgeo;
701 error = xfs_fs_geometry(mp, &fsgeo, 3);
706 * Caller should have passed an argument of type
707 * xfs_fsop_geom_v1_t. This is a proper subset of the
708 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
710 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
711 return -XFS_ERROR(EFAULT);
720 xfs_fsop_geom_t fsgeo;
723 error = xfs_fs_geometry(mp, &fsgeo, 4);
727 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
728 return -XFS_ERROR(EFAULT);
733 * Linux extended inode flags interface.
737 xfs_merge_ioc_xflags(
741 unsigned int xflags = start;
743 if (flags & FS_IMMUTABLE_FL)
744 xflags |= XFS_XFLAG_IMMUTABLE;
746 xflags &= ~XFS_XFLAG_IMMUTABLE;
747 if (flags & FS_APPEND_FL)
748 xflags |= XFS_XFLAG_APPEND;
750 xflags &= ~XFS_XFLAG_APPEND;
751 if (flags & FS_SYNC_FL)
752 xflags |= XFS_XFLAG_SYNC;
754 xflags &= ~XFS_XFLAG_SYNC;
755 if (flags & FS_NOATIME_FL)
756 xflags |= XFS_XFLAG_NOATIME;
758 xflags &= ~XFS_XFLAG_NOATIME;
759 if (flags & FS_NODUMP_FL)
760 xflags |= XFS_XFLAG_NODUMP;
762 xflags &= ~XFS_XFLAG_NODUMP;
771 unsigned int flags = 0;
773 if (di_flags & XFS_DIFLAG_IMMUTABLE)
774 flags |= FS_IMMUTABLE_FL;
775 if (di_flags & XFS_DIFLAG_APPEND)
776 flags |= FS_APPEND_FL;
777 if (di_flags & XFS_DIFLAG_SYNC)
779 if (di_flags & XFS_DIFLAG_NOATIME)
780 flags |= FS_NOATIME_FL;
781 if (di_flags & XFS_DIFLAG_NODUMP)
782 flags |= FS_NODUMP_FL;
794 memset(&fa, 0, sizeof(struct fsxattr));
796 xfs_ilock(ip, XFS_ILOCK_SHARED);
797 fa.fsx_xflags = xfs_ip2xflags(ip);
798 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
799 fa.fsx_projid = xfs_get_projid(ip);
803 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
804 fa.fsx_nextents = ip->i_afp->if_bytes /
805 sizeof(xfs_bmbt_rec_t);
807 fa.fsx_nextents = ip->i_d.di_anextents;
811 if (ip->i_df.if_flags & XFS_IFEXTENTS)
812 fa.fsx_nextents = ip->i_df.if_bytes /
813 sizeof(xfs_bmbt_rec_t);
815 fa.fsx_nextents = ip->i_d.di_nextents;
817 xfs_iunlock(ip, XFS_ILOCK_SHARED);
819 if (copy_to_user(arg, &fa, sizeof(fa)))
826 struct xfs_inode *ip,
829 unsigned int di_flags;
831 /* can't set PREALLOC this way, just preserve it */
832 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
833 if (xflags & XFS_XFLAG_IMMUTABLE)
834 di_flags |= XFS_DIFLAG_IMMUTABLE;
835 if (xflags & XFS_XFLAG_APPEND)
836 di_flags |= XFS_DIFLAG_APPEND;
837 if (xflags & XFS_XFLAG_SYNC)
838 di_flags |= XFS_DIFLAG_SYNC;
839 if (xflags & XFS_XFLAG_NOATIME)
840 di_flags |= XFS_DIFLAG_NOATIME;
841 if (xflags & XFS_XFLAG_NODUMP)
842 di_flags |= XFS_DIFLAG_NODUMP;
843 if (xflags & XFS_XFLAG_PROJINHERIT)
844 di_flags |= XFS_DIFLAG_PROJINHERIT;
845 if (xflags & XFS_XFLAG_NODEFRAG)
846 di_flags |= XFS_DIFLAG_NODEFRAG;
847 if (xflags & XFS_XFLAG_FILESTREAM)
848 di_flags |= XFS_DIFLAG_FILESTREAM;
849 if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
850 if (xflags & XFS_XFLAG_RTINHERIT)
851 di_flags |= XFS_DIFLAG_RTINHERIT;
852 if (xflags & XFS_XFLAG_NOSYMLINKS)
853 di_flags |= XFS_DIFLAG_NOSYMLINKS;
854 if (xflags & XFS_XFLAG_EXTSZINHERIT)
855 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
856 } else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) {
857 if (xflags & XFS_XFLAG_REALTIME)
858 di_flags |= XFS_DIFLAG_REALTIME;
859 if (xflags & XFS_XFLAG_EXTSIZE)
860 di_flags |= XFS_DIFLAG_EXTSIZE;
863 ip->i_d.di_flags = di_flags;
867 xfs_diflags_to_linux(
868 struct xfs_inode *ip)
870 struct inode *inode = VFS_I(ip);
871 unsigned int xflags = xfs_ip2xflags(ip);
873 if (xflags & XFS_XFLAG_IMMUTABLE)
874 inode->i_flags |= S_IMMUTABLE;
876 inode->i_flags &= ~S_IMMUTABLE;
877 if (xflags & XFS_XFLAG_APPEND)
878 inode->i_flags |= S_APPEND;
880 inode->i_flags &= ~S_APPEND;
881 if (xflags & XFS_XFLAG_SYNC)
882 inode->i_flags |= S_SYNC;
884 inode->i_flags &= ~S_SYNC;
885 if (xflags & XFS_XFLAG_NOATIME)
886 inode->i_flags |= S_NOATIME;
888 inode->i_flags &= ~S_NOATIME;
892 #define FSX_EXTSIZE 2
894 #define FSX_NONBLOCK 8
902 struct xfs_mount *mp = ip->i_mount;
903 struct xfs_trans *tp;
904 unsigned int lock_flags = 0;
905 struct xfs_dquot *udqp = NULL;
906 struct xfs_dquot *gdqp = NULL;
907 struct xfs_dquot *olddquot = NULL;
910 trace_xfs_ioctl_setattr(ip);
912 if (mp->m_flags & XFS_MOUNT_RDONLY)
913 return XFS_ERROR(EROFS);
914 if (XFS_FORCED_SHUTDOWN(mp))
915 return XFS_ERROR(EIO);
918 * Disallow 32bit project ids when projid32bit feature is not enabled.
920 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
921 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
922 return XFS_ERROR(EINVAL);
925 * If disk quotas is on, we make sure that the dquots do exist on disk,
926 * before we start any other transactions. Trying to do this later
927 * is messy. We don't care to take a readlock to look at the ids
928 * in inode here, because we can't hold it across the trans_reserve.
929 * If the IDs do change before we take the ilock, we're covered
930 * because the i_*dquot fields will get updated anyway.
932 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
933 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
934 ip->i_d.di_gid, fa->fsx_projid,
935 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
941 * For the other attributes, we acquire the inode lock and
942 * first do an error checking pass.
944 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
945 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
949 lock_flags = XFS_ILOCK_EXCL;
950 xfs_ilock(ip, lock_flags);
953 * CAP_FOWNER overrides the following restrictions:
955 * The user ID of the calling process must be equal
956 * to the file owner ID, except in cases where the
957 * CAP_FSETID capability is applicable.
959 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
960 code = XFS_ERROR(EPERM);
965 * Do a quota reservation only if projid is actually going to change.
967 if (mask & FSX_PROJID) {
968 if (XFS_IS_QUOTA_RUNNING(mp) &&
969 XFS_IS_PQUOTA_ON(mp) &&
970 xfs_get_projid(ip) != fa->fsx_projid) {
972 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
973 capable(CAP_FOWNER) ?
974 XFS_QMOPT_FORCE_RES : 0);
975 if (code) /* out of quota */
980 if (mask & FSX_EXTSIZE) {
982 * Can't change extent size if any extents are allocated.
984 if (ip->i_d.di_nextents &&
985 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
987 code = XFS_ERROR(EINVAL); /* EFBIG? */
992 * Extent size must be a multiple of the appropriate block
993 * size, if set at all. It must also be smaller than the
994 * maximum extent size supported by the filesystem.
996 * Also, for non-realtime files, limit the extent size hint to
997 * half the size of the AGs in the filesystem so alignment
998 * doesn't result in extents larger than an AG.
1000 if (fa->fsx_extsize != 0) {
1002 xfs_fsblock_t extsize_fsb;
1004 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1005 if (extsize_fsb > MAXEXTLEN) {
1006 code = XFS_ERROR(EINVAL);
1010 if (XFS_IS_REALTIME_INODE(ip) ||
1011 ((mask & FSX_XFLAGS) &&
1012 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1013 size = mp->m_sb.sb_rextsize <<
1014 mp->m_sb.sb_blocklog;
1016 size = mp->m_sb.sb_blocksize;
1017 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1018 code = XFS_ERROR(EINVAL);
1023 if (fa->fsx_extsize % size) {
1024 code = XFS_ERROR(EINVAL);
1031 if (mask & FSX_XFLAGS) {
1033 * Can't change realtime flag if any extents are allocated.
1035 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1036 (XFS_IS_REALTIME_INODE(ip)) !=
1037 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1038 code = XFS_ERROR(EINVAL); /* EFBIG? */
1043 * If realtime flag is set then must have realtime data.
1045 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1046 if ((mp->m_sb.sb_rblocks == 0) ||
1047 (mp->m_sb.sb_rextsize == 0) ||
1048 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1049 code = XFS_ERROR(EINVAL);
1055 * Can't modify an immutable/append-only file unless
1056 * we have appropriate permission.
1058 if ((ip->i_d.di_flags &
1059 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1061 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1062 !capable(CAP_LINUX_IMMUTABLE)) {
1063 code = XFS_ERROR(EPERM);
1068 xfs_trans_ijoin(tp, ip);
1071 * Change file ownership. Must be the owner or privileged.
1073 if (mask & FSX_PROJID) {
1075 * CAP_FSETID overrides the following restrictions:
1077 * The set-user-ID and set-group-ID bits of a file will be
1078 * cleared upon successful return from chown()
1080 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1081 !capable(CAP_FSETID))
1082 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1085 * Change the ownerships and register quota modifications
1086 * in the transaction.
1088 if (xfs_get_projid(ip) != fa->fsx_projid) {
1089 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1090 olddquot = xfs_qm_vop_chown(tp, ip,
1091 &ip->i_gdquot, gdqp);
1093 xfs_set_projid(ip, fa->fsx_projid);
1096 * We may have to rev the inode as well as
1097 * the superblock version number since projids didn't
1098 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1100 if (ip->i_d.di_version == 1)
1101 xfs_bump_ino_vers2(tp, ip);
1106 if (mask & FSX_EXTSIZE)
1107 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1108 if (mask & FSX_XFLAGS) {
1109 xfs_set_diflags(ip, fa->fsx_xflags);
1110 xfs_diflags_to_linux(ip);
1113 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1114 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1116 XFS_STATS_INC(xs_ig_attrchg);
1119 * If this is a synchronous mount, make sure that the
1120 * transaction goes to disk before returning to the user.
1121 * This is slightly sub-optimal in that truncates require
1122 * two sync transactions instead of one for wsync filesystems.
1123 * One for the truncate and one for the timestamps since we
1124 * don't want to change the timestamps unless we're sure the
1125 * truncate worked. Truncates are less than 1% of the laddis
1126 * mix so this probably isn't worth the trouble to optimize.
1128 if (mp->m_flags & XFS_MOUNT_WSYNC)
1129 xfs_trans_set_sync(tp);
1130 code = xfs_trans_commit(tp, 0);
1131 xfs_iunlock(ip, lock_flags);
1134 * Release any dquot(s) the inode had kept before chown.
1136 xfs_qm_dqrele(olddquot);
1137 xfs_qm_dqrele(udqp);
1138 xfs_qm_dqrele(gdqp);
1143 xfs_qm_dqrele(udqp);
1144 xfs_qm_dqrele(gdqp);
1145 xfs_trans_cancel(tp, 0);
1147 xfs_iunlock(ip, lock_flags);
1160 if (copy_from_user(&fa, arg, sizeof(fa)))
1163 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1164 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1165 mask |= FSX_NONBLOCK;
1167 return -xfs_ioctl_setattr(ip, &fa, mask);
1177 flags = xfs_di2lxflags(ip->i_d.di_flags);
1178 if (copy_to_user(arg, &flags, sizeof(flags)))
1193 if (copy_from_user(&flags, arg, sizeof(flags)))
1196 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1197 FS_NOATIME_FL | FS_NODUMP_FL | \
1202 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1203 mask |= FSX_NONBLOCK;
1204 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1206 return -xfs_ioctl_setattr(ip, &fa, mask);
1210 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1212 struct getbmap __user *base = *ap;
1214 /* copy only getbmap portion (not getbmapx) */
1215 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1216 return XFS_ERROR(EFAULT);
1218 *ap += sizeof(struct getbmap);
1224 struct xfs_inode *ip,
1229 struct getbmapx bmx;
1232 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1233 return -XFS_ERROR(EFAULT);
1235 if (bmx.bmv_count < 2)
1236 return -XFS_ERROR(EINVAL);
1238 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1239 if (ioflags & IO_INVIS)
1240 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1242 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1243 (struct getbmap *)arg+1);
1247 /* copy back header - only size of getbmap */
1248 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1249 return -XFS_ERROR(EFAULT);
1254 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1256 struct getbmapx __user *base = *ap;
1258 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1259 return XFS_ERROR(EFAULT);
1261 *ap += sizeof(struct getbmapx);
1267 struct xfs_inode *ip,
1270 struct getbmapx bmx;
1273 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1274 return -XFS_ERROR(EFAULT);
1276 if (bmx.bmv_count < 2)
1277 return -XFS_ERROR(EINVAL);
1279 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1280 return -XFS_ERROR(EINVAL);
1282 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1283 (struct getbmapx *)arg+1);
1287 /* copy back header */
1288 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1289 return -XFS_ERROR(EFAULT);
1295 * Note: some of the ioctl's return positive numbers as a
1296 * byte count indicating success, such as readlink_by_handle.
1297 * So we don't "sign flip" like most other routines. This means
1298 * true errors need to be returned as a negative value.
1306 struct inode *inode = filp->f_path.dentry->d_inode;
1307 struct xfs_inode *ip = XFS_I(inode);
1308 struct xfs_mount *mp = ip->i_mount;
1309 void __user *arg = (void __user *)p;
1313 if (filp->f_mode & FMODE_NOCMTIME)
1314 ioflags |= IO_INVIS;
1316 trace_xfs_file_ioctl(ip);
1320 return xfs_ioc_trim(mp, arg);
1321 case XFS_IOC_ALLOCSP:
1322 case XFS_IOC_FREESP:
1323 case XFS_IOC_RESVSP:
1324 case XFS_IOC_UNRESVSP:
1325 case XFS_IOC_ALLOCSP64:
1326 case XFS_IOC_FREESP64:
1327 case XFS_IOC_RESVSP64:
1328 case XFS_IOC_UNRESVSP64:
1329 case XFS_IOC_ZERO_RANGE: {
1332 if (copy_from_user(&bf, arg, sizeof(bf)))
1333 return -XFS_ERROR(EFAULT);
1334 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1336 case XFS_IOC_DIOINFO: {
1338 xfs_buftarg_t *target =
1339 XFS_IS_REALTIME_INODE(ip) ?
1340 mp->m_rtdev_targp : mp->m_ddev_targp;
1342 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1343 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1345 if (copy_to_user(arg, &da, sizeof(da)))
1346 return -XFS_ERROR(EFAULT);
1350 case XFS_IOC_FSBULKSTAT_SINGLE:
1351 case XFS_IOC_FSBULKSTAT:
1352 case XFS_IOC_FSINUMBERS:
1353 return xfs_ioc_bulkstat(mp, cmd, arg);
1355 case XFS_IOC_FSGEOMETRY_V1:
1356 return xfs_ioc_fsgeometry_v1(mp, arg);
1358 case XFS_IOC_FSGEOMETRY:
1359 return xfs_ioc_fsgeometry(mp, arg);
1361 case XFS_IOC_GETVERSION:
1362 return put_user(inode->i_generation, (int __user *)arg);
1364 case XFS_IOC_FSGETXATTR:
1365 return xfs_ioc_fsgetxattr(ip, 0, arg);
1366 case XFS_IOC_FSGETXATTRA:
1367 return xfs_ioc_fsgetxattr(ip, 1, arg);
1368 case XFS_IOC_FSSETXATTR:
1369 return xfs_ioc_fssetxattr(ip, filp, arg);
1370 case XFS_IOC_GETXFLAGS:
1371 return xfs_ioc_getxflags(ip, arg);
1372 case XFS_IOC_SETXFLAGS:
1373 return xfs_ioc_setxflags(ip, filp, arg);
1375 case XFS_IOC_FSSETDM: {
1376 struct fsdmidata dmi;
1378 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1379 return -XFS_ERROR(EFAULT);
1381 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1386 case XFS_IOC_GETBMAP:
1387 case XFS_IOC_GETBMAPA:
1388 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1390 case XFS_IOC_GETBMAPX:
1391 return xfs_ioc_getbmapx(ip, arg);
1393 case XFS_IOC_FD_TO_HANDLE:
1394 case XFS_IOC_PATH_TO_HANDLE:
1395 case XFS_IOC_PATH_TO_FSHANDLE: {
1396 xfs_fsop_handlereq_t hreq;
1398 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1399 return -XFS_ERROR(EFAULT);
1400 return xfs_find_handle(cmd, &hreq);
1402 case XFS_IOC_OPEN_BY_HANDLE: {
1403 xfs_fsop_handlereq_t hreq;
1405 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1406 return -XFS_ERROR(EFAULT);
1407 return xfs_open_by_handle(filp, &hreq);
1409 case XFS_IOC_FSSETDM_BY_HANDLE:
1410 return xfs_fssetdm_by_handle(filp, arg);
1412 case XFS_IOC_READLINK_BY_HANDLE: {
1413 xfs_fsop_handlereq_t hreq;
1415 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1416 return -XFS_ERROR(EFAULT);
1417 return xfs_readlink_by_handle(filp, &hreq);
1419 case XFS_IOC_ATTRLIST_BY_HANDLE:
1420 return xfs_attrlist_by_handle(filp, arg);
1422 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1423 return xfs_attrmulti_by_handle(filp, arg);
1425 case XFS_IOC_SWAPEXT: {
1426 struct xfs_swapext sxp;
1428 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1429 return -XFS_ERROR(EFAULT);
1430 error = xfs_swapext(&sxp);
1434 case XFS_IOC_FSCOUNTS: {
1435 xfs_fsop_counts_t out;
1437 error = xfs_fs_counts(mp, &out);
1441 if (copy_to_user(arg, &out, sizeof(out)))
1442 return -XFS_ERROR(EFAULT);
1446 case XFS_IOC_SET_RESBLKS: {
1447 xfs_fsop_resblks_t inout;
1450 if (!capable(CAP_SYS_ADMIN))
1453 if (mp->m_flags & XFS_MOUNT_RDONLY)
1454 return -XFS_ERROR(EROFS);
1456 if (copy_from_user(&inout, arg, sizeof(inout)))
1457 return -XFS_ERROR(EFAULT);
1459 /* input parameter is passed in resblks field of structure */
1461 error = xfs_reserve_blocks(mp, &in, &inout);
1465 if (copy_to_user(arg, &inout, sizeof(inout)))
1466 return -XFS_ERROR(EFAULT);
1470 case XFS_IOC_GET_RESBLKS: {
1471 xfs_fsop_resblks_t out;
1473 if (!capable(CAP_SYS_ADMIN))
1476 error = xfs_reserve_blocks(mp, NULL, &out);
1480 if (copy_to_user(arg, &out, sizeof(out)))
1481 return -XFS_ERROR(EFAULT);
1486 case XFS_IOC_FSGROWFSDATA: {
1487 xfs_growfs_data_t in;
1489 if (copy_from_user(&in, arg, sizeof(in)))
1490 return -XFS_ERROR(EFAULT);
1492 error = xfs_growfs_data(mp, &in);
1496 case XFS_IOC_FSGROWFSLOG: {
1497 xfs_growfs_log_t in;
1499 if (copy_from_user(&in, arg, sizeof(in)))
1500 return -XFS_ERROR(EFAULT);
1502 error = xfs_growfs_log(mp, &in);
1506 case XFS_IOC_FSGROWFSRT: {
1509 if (copy_from_user(&in, arg, sizeof(in)))
1510 return -XFS_ERROR(EFAULT);
1512 error = xfs_growfs_rt(mp, &in);
1516 case XFS_IOC_GOINGDOWN: {
1519 if (!capable(CAP_SYS_ADMIN))
1522 if (get_user(in, (__uint32_t __user *)arg))
1523 return -XFS_ERROR(EFAULT);
1525 error = xfs_fs_goingdown(mp, in);
1529 case XFS_IOC_ERROR_INJECTION: {
1530 xfs_error_injection_t in;
1532 if (!capable(CAP_SYS_ADMIN))
1535 if (copy_from_user(&in, arg, sizeof(in)))
1536 return -XFS_ERROR(EFAULT);
1538 error = xfs_errortag_add(in.errtag, mp);
1542 case XFS_IOC_ERROR_CLEARALL:
1543 if (!capable(CAP_SYS_ADMIN))
1546 error = xfs_errortag_clearall(mp, 1);