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 (S_ISREG(inode->i_mode)) {
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;
628 if (filp->f_flags & O_DSYNC)
629 attr_flags |= XFS_ATTR_SYNC;
631 if (ioflags & IO_INVIS)
632 attr_flags |= XFS_ATTR_DMI;
634 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
644 xfs_fsop_bulkreq_t bulkreq;
645 int count; /* # of records returned */
646 xfs_ino_t inlast; /* last inode number */
650 /* done = 1 if there are more stats to get and if bulkstat */
651 /* should be called again (unused here, but used in dmapi) */
653 if (!capable(CAP_SYS_ADMIN))
656 if (XFS_FORCED_SHUTDOWN(mp))
657 return -XFS_ERROR(EIO);
659 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
660 return -XFS_ERROR(EFAULT);
662 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
663 return -XFS_ERROR(EFAULT);
665 if ((count = bulkreq.icount) <= 0)
666 return -XFS_ERROR(EINVAL);
668 if (bulkreq.ubuffer == NULL)
669 return -XFS_ERROR(EINVAL);
671 if (cmd == XFS_IOC_FSINUMBERS)
672 error = xfs_inumbers(mp, &inlast, &count,
673 bulkreq.ubuffer, xfs_inumbers_fmt);
674 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
675 error = xfs_bulkstat_single(mp, &inlast,
676 bulkreq.ubuffer, &done);
677 else /* XFS_IOC_FSBULKSTAT */
678 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
679 sizeof(xfs_bstat_t), bulkreq.ubuffer,
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_t fsgeo;
705 error = xfs_fs_geometry(mp, &fsgeo, 3);
710 * Caller should have passed an argument of type
711 * xfs_fsop_geom_v1_t. This is a proper subset of the
712 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
714 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
715 return -XFS_ERROR(EFAULT);
724 xfs_fsop_geom_t fsgeo;
727 error = xfs_fs_geometry(mp, &fsgeo, 4);
731 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
732 return -XFS_ERROR(EFAULT);
737 * Linux extended inode flags interface.
741 xfs_merge_ioc_xflags(
745 unsigned int xflags = start;
747 if (flags & FS_IMMUTABLE_FL)
748 xflags |= XFS_XFLAG_IMMUTABLE;
750 xflags &= ~XFS_XFLAG_IMMUTABLE;
751 if (flags & FS_APPEND_FL)
752 xflags |= XFS_XFLAG_APPEND;
754 xflags &= ~XFS_XFLAG_APPEND;
755 if (flags & FS_SYNC_FL)
756 xflags |= XFS_XFLAG_SYNC;
758 xflags &= ~XFS_XFLAG_SYNC;
759 if (flags & FS_NOATIME_FL)
760 xflags |= XFS_XFLAG_NOATIME;
762 xflags &= ~XFS_XFLAG_NOATIME;
763 if (flags & FS_NODUMP_FL)
764 xflags |= XFS_XFLAG_NODUMP;
766 xflags &= ~XFS_XFLAG_NODUMP;
775 unsigned int flags = 0;
777 if (di_flags & XFS_DIFLAG_IMMUTABLE)
778 flags |= FS_IMMUTABLE_FL;
779 if (di_flags & XFS_DIFLAG_APPEND)
780 flags |= FS_APPEND_FL;
781 if (di_flags & XFS_DIFLAG_SYNC)
783 if (di_flags & XFS_DIFLAG_NOATIME)
784 flags |= FS_NOATIME_FL;
785 if (di_flags & XFS_DIFLAG_NODUMP)
786 flags |= FS_NODUMP_FL;
798 memset(&fa, 0, sizeof(struct fsxattr));
800 xfs_ilock(ip, XFS_ILOCK_SHARED);
801 fa.fsx_xflags = xfs_ip2xflags(ip);
802 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
803 fa.fsx_projid = xfs_get_projid(ip);
807 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
808 fa.fsx_nextents = ip->i_afp->if_bytes /
809 sizeof(xfs_bmbt_rec_t);
811 fa.fsx_nextents = ip->i_d.di_anextents;
815 if (ip->i_df.if_flags & XFS_IFEXTENTS)
816 fa.fsx_nextents = ip->i_df.if_bytes /
817 sizeof(xfs_bmbt_rec_t);
819 fa.fsx_nextents = ip->i_d.di_nextents;
821 xfs_iunlock(ip, XFS_ILOCK_SHARED);
823 if (copy_to_user(arg, &fa, sizeof(fa)))
830 struct xfs_inode *ip,
833 unsigned int di_flags;
835 /* can't set PREALLOC this way, just preserve it */
836 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
837 if (xflags & XFS_XFLAG_IMMUTABLE)
838 di_flags |= XFS_DIFLAG_IMMUTABLE;
839 if (xflags & XFS_XFLAG_APPEND)
840 di_flags |= XFS_DIFLAG_APPEND;
841 if (xflags & XFS_XFLAG_SYNC)
842 di_flags |= XFS_DIFLAG_SYNC;
843 if (xflags & XFS_XFLAG_NOATIME)
844 di_flags |= XFS_DIFLAG_NOATIME;
845 if (xflags & XFS_XFLAG_NODUMP)
846 di_flags |= XFS_DIFLAG_NODUMP;
847 if (xflags & XFS_XFLAG_PROJINHERIT)
848 di_flags |= XFS_DIFLAG_PROJINHERIT;
849 if (xflags & XFS_XFLAG_NODEFRAG)
850 di_flags |= XFS_DIFLAG_NODEFRAG;
851 if (xflags & XFS_XFLAG_FILESTREAM)
852 di_flags |= XFS_DIFLAG_FILESTREAM;
853 if (S_ISDIR(ip->i_d.di_mode)) {
854 if (xflags & XFS_XFLAG_RTINHERIT)
855 di_flags |= XFS_DIFLAG_RTINHERIT;
856 if (xflags & XFS_XFLAG_NOSYMLINKS)
857 di_flags |= XFS_DIFLAG_NOSYMLINKS;
858 if (xflags & XFS_XFLAG_EXTSZINHERIT)
859 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
860 } else if (S_ISREG(ip->i_d.di_mode)) {
861 if (xflags & XFS_XFLAG_REALTIME)
862 di_flags |= XFS_DIFLAG_REALTIME;
863 if (xflags & XFS_XFLAG_EXTSIZE)
864 di_flags |= XFS_DIFLAG_EXTSIZE;
867 ip->i_d.di_flags = di_flags;
871 xfs_diflags_to_linux(
872 struct xfs_inode *ip)
874 struct inode *inode = VFS_I(ip);
875 unsigned int xflags = xfs_ip2xflags(ip);
877 if (xflags & XFS_XFLAG_IMMUTABLE)
878 inode->i_flags |= S_IMMUTABLE;
880 inode->i_flags &= ~S_IMMUTABLE;
881 if (xflags & XFS_XFLAG_APPEND)
882 inode->i_flags |= S_APPEND;
884 inode->i_flags &= ~S_APPEND;
885 if (xflags & XFS_XFLAG_SYNC)
886 inode->i_flags |= S_SYNC;
888 inode->i_flags &= ~S_SYNC;
889 if (xflags & XFS_XFLAG_NOATIME)
890 inode->i_flags |= S_NOATIME;
892 inode->i_flags &= ~S_NOATIME;
896 #define FSX_EXTSIZE 2
898 #define FSX_NONBLOCK 8
906 struct xfs_mount *mp = ip->i_mount;
907 struct xfs_trans *tp;
908 unsigned int lock_flags = 0;
909 struct xfs_dquot *udqp = NULL;
910 struct xfs_dquot *gdqp = NULL;
911 struct xfs_dquot *olddquot = NULL;
914 trace_xfs_ioctl_setattr(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 * Disallow 32bit project ids when projid32bit feature is not enabled.
924 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
925 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
926 return XFS_ERROR(EINVAL);
929 * If disk quotas is on, we make sure that the dquots do exist on disk,
930 * before we start any other transactions. Trying to do this later
931 * is messy. We don't care to take a readlock to look at the ids
932 * in inode here, because we can't hold it across the trans_reserve.
933 * If the IDs do change before we take the ilock, we're covered
934 * because the i_*dquot fields will get updated anyway.
936 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
937 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
938 ip->i_d.di_gid, fa->fsx_projid,
939 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
945 * For the other attributes, we acquire the inode lock and
946 * first do an error checking pass.
948 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
949 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
953 lock_flags = XFS_ILOCK_EXCL;
954 xfs_ilock(ip, lock_flags);
957 * CAP_FOWNER overrides the following restrictions:
959 * The user ID of the calling process must be equal
960 * to the file owner ID, except in cases where the
961 * CAP_FSETID capability is applicable.
963 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
964 code = XFS_ERROR(EPERM);
969 * Do a quota reservation only if projid is actually going to change.
971 if (mask & FSX_PROJID) {
972 if (XFS_IS_QUOTA_RUNNING(mp) &&
973 XFS_IS_PQUOTA_ON(mp) &&
974 xfs_get_projid(ip) != fa->fsx_projid) {
976 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
977 capable(CAP_FOWNER) ?
978 XFS_QMOPT_FORCE_RES : 0);
979 if (code) /* out of quota */
984 if (mask & FSX_EXTSIZE) {
986 * Can't change extent size if any extents are allocated.
988 if (ip->i_d.di_nextents &&
989 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
991 code = XFS_ERROR(EINVAL); /* EFBIG? */
996 * Extent size must be a multiple of the appropriate block
997 * size, if set at all. It must also be smaller than the
998 * maximum extent size supported by the filesystem.
1000 * Also, for non-realtime files, limit the extent size hint to
1001 * half the size of the AGs in the filesystem so alignment
1002 * doesn't result in extents larger than an AG.
1004 if (fa->fsx_extsize != 0) {
1006 xfs_fsblock_t extsize_fsb;
1008 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1009 if (extsize_fsb > MAXEXTLEN) {
1010 code = XFS_ERROR(EINVAL);
1014 if (XFS_IS_REALTIME_INODE(ip) ||
1015 ((mask & FSX_XFLAGS) &&
1016 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1017 size = mp->m_sb.sb_rextsize <<
1018 mp->m_sb.sb_blocklog;
1020 size = mp->m_sb.sb_blocksize;
1021 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1022 code = XFS_ERROR(EINVAL);
1027 if (fa->fsx_extsize % size) {
1028 code = XFS_ERROR(EINVAL);
1035 if (mask & FSX_XFLAGS) {
1037 * Can't change realtime flag if any extents are allocated.
1039 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1040 (XFS_IS_REALTIME_INODE(ip)) !=
1041 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1042 code = XFS_ERROR(EINVAL); /* EFBIG? */
1047 * If realtime flag is set then must have realtime data.
1049 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1050 if ((mp->m_sb.sb_rblocks == 0) ||
1051 (mp->m_sb.sb_rextsize == 0) ||
1052 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1053 code = XFS_ERROR(EINVAL);
1059 * Can't modify an immutable/append-only file unless
1060 * we have appropriate permission.
1062 if ((ip->i_d.di_flags &
1063 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1065 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1066 !capable(CAP_LINUX_IMMUTABLE)) {
1067 code = XFS_ERROR(EPERM);
1072 xfs_trans_ijoin(tp, ip);
1075 * Change file ownership. Must be the owner or privileged.
1077 if (mask & FSX_PROJID) {
1079 * CAP_FSETID overrides the following restrictions:
1081 * The set-user-ID and set-group-ID bits of a file will be
1082 * cleared upon successful return from chown()
1084 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1085 !capable(CAP_FSETID))
1086 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1089 * Change the ownerships and register quota modifications
1090 * in the transaction.
1092 if (xfs_get_projid(ip) != fa->fsx_projid) {
1093 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1094 olddquot = xfs_qm_vop_chown(tp, ip,
1095 &ip->i_gdquot, gdqp);
1097 xfs_set_projid(ip, fa->fsx_projid);
1100 * We may have to rev the inode as well as
1101 * the superblock version number since projids didn't
1102 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1104 if (ip->i_d.di_version == 1)
1105 xfs_bump_ino_vers2(tp, ip);
1110 if (mask & FSX_EXTSIZE)
1111 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1112 if (mask & FSX_XFLAGS) {
1113 xfs_set_diflags(ip, fa->fsx_xflags);
1114 xfs_diflags_to_linux(ip);
1117 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1118 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1120 XFS_STATS_INC(xs_ig_attrchg);
1123 * If this is a synchronous mount, make sure that the
1124 * transaction goes to disk before returning to the user.
1125 * This is slightly sub-optimal in that truncates require
1126 * two sync transactions instead of one for wsync filesystems.
1127 * One for the truncate and one for the timestamps since we
1128 * don't want to change the timestamps unless we're sure the
1129 * truncate worked. Truncates are less than 1% of the laddis
1130 * mix so this probably isn't worth the trouble to optimize.
1132 if (mp->m_flags & XFS_MOUNT_WSYNC)
1133 xfs_trans_set_sync(tp);
1134 code = xfs_trans_commit(tp, 0);
1135 xfs_iunlock(ip, lock_flags);
1138 * Release any dquot(s) the inode had kept before chown.
1140 xfs_qm_dqrele(olddquot);
1141 xfs_qm_dqrele(udqp);
1142 xfs_qm_dqrele(gdqp);
1147 xfs_qm_dqrele(udqp);
1148 xfs_qm_dqrele(gdqp);
1149 xfs_trans_cancel(tp, 0);
1151 xfs_iunlock(ip, lock_flags);
1164 if (copy_from_user(&fa, arg, sizeof(fa)))
1167 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1168 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1169 mask |= FSX_NONBLOCK;
1171 return -xfs_ioctl_setattr(ip, &fa, mask);
1181 flags = xfs_di2lxflags(ip->i_d.di_flags);
1182 if (copy_to_user(arg, &flags, sizeof(flags)))
1197 if (copy_from_user(&flags, arg, sizeof(flags)))
1200 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1201 FS_NOATIME_FL | FS_NODUMP_FL | \
1206 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1207 mask |= FSX_NONBLOCK;
1208 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1210 return -xfs_ioctl_setattr(ip, &fa, mask);
1214 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1216 struct getbmap __user *base = *ap;
1218 /* copy only getbmap portion (not getbmapx) */
1219 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1220 return XFS_ERROR(EFAULT);
1222 *ap += sizeof(struct getbmap);
1228 struct xfs_inode *ip,
1233 struct getbmapx bmx;
1236 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1237 return -XFS_ERROR(EFAULT);
1239 if (bmx.bmv_count < 2)
1240 return -XFS_ERROR(EINVAL);
1242 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1243 if (ioflags & IO_INVIS)
1244 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1246 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1247 (struct getbmap *)arg+1);
1251 /* copy back header - only size of getbmap */
1252 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1253 return -XFS_ERROR(EFAULT);
1258 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1260 struct getbmapx __user *base = *ap;
1262 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1263 return XFS_ERROR(EFAULT);
1265 *ap += sizeof(struct getbmapx);
1271 struct xfs_inode *ip,
1274 struct getbmapx bmx;
1277 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1278 return -XFS_ERROR(EFAULT);
1280 if (bmx.bmv_count < 2)
1281 return -XFS_ERROR(EINVAL);
1283 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1284 return -XFS_ERROR(EINVAL);
1286 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1287 (struct getbmapx *)arg+1);
1291 /* copy back header */
1292 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1293 return -XFS_ERROR(EFAULT);
1299 * Note: some of the ioctl's return positive numbers as a
1300 * byte count indicating success, such as readlink_by_handle.
1301 * So we don't "sign flip" like most other routines. This means
1302 * true errors need to be returned as a negative value.
1310 struct inode *inode = filp->f_path.dentry->d_inode;
1311 struct xfs_inode *ip = XFS_I(inode);
1312 struct xfs_mount *mp = ip->i_mount;
1313 void __user *arg = (void __user *)p;
1317 if (filp->f_mode & FMODE_NOCMTIME)
1318 ioflags |= IO_INVIS;
1320 trace_xfs_file_ioctl(ip);
1324 return xfs_ioc_trim(mp, arg);
1325 case XFS_IOC_ALLOCSP:
1326 case XFS_IOC_FREESP:
1327 case XFS_IOC_RESVSP:
1328 case XFS_IOC_UNRESVSP:
1329 case XFS_IOC_ALLOCSP64:
1330 case XFS_IOC_FREESP64:
1331 case XFS_IOC_RESVSP64:
1332 case XFS_IOC_UNRESVSP64:
1333 case XFS_IOC_ZERO_RANGE: {
1336 if (copy_from_user(&bf, arg, sizeof(bf)))
1337 return -XFS_ERROR(EFAULT);
1338 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1340 case XFS_IOC_DIOINFO: {
1342 xfs_buftarg_t *target =
1343 XFS_IS_REALTIME_INODE(ip) ?
1344 mp->m_rtdev_targp : mp->m_ddev_targp;
1346 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1347 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1349 if (copy_to_user(arg, &da, sizeof(da)))
1350 return -XFS_ERROR(EFAULT);
1354 case XFS_IOC_FSBULKSTAT_SINGLE:
1355 case XFS_IOC_FSBULKSTAT:
1356 case XFS_IOC_FSINUMBERS:
1357 return xfs_ioc_bulkstat(mp, cmd, arg);
1359 case XFS_IOC_FSGEOMETRY_V1:
1360 return xfs_ioc_fsgeometry_v1(mp, arg);
1362 case XFS_IOC_FSGEOMETRY:
1363 return xfs_ioc_fsgeometry(mp, arg);
1365 case XFS_IOC_GETVERSION:
1366 return put_user(inode->i_generation, (int __user *)arg);
1368 case XFS_IOC_FSGETXATTR:
1369 return xfs_ioc_fsgetxattr(ip, 0, arg);
1370 case XFS_IOC_FSGETXATTRA:
1371 return xfs_ioc_fsgetxattr(ip, 1, arg);
1372 case XFS_IOC_FSSETXATTR:
1373 return xfs_ioc_fssetxattr(ip, filp, arg);
1374 case XFS_IOC_GETXFLAGS:
1375 return xfs_ioc_getxflags(ip, arg);
1376 case XFS_IOC_SETXFLAGS:
1377 return xfs_ioc_setxflags(ip, filp, arg);
1379 case XFS_IOC_FSSETDM: {
1380 struct fsdmidata dmi;
1382 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1383 return -XFS_ERROR(EFAULT);
1385 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1390 case XFS_IOC_GETBMAP:
1391 case XFS_IOC_GETBMAPA:
1392 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1394 case XFS_IOC_GETBMAPX:
1395 return xfs_ioc_getbmapx(ip, arg);
1397 case XFS_IOC_FD_TO_HANDLE:
1398 case XFS_IOC_PATH_TO_HANDLE:
1399 case XFS_IOC_PATH_TO_FSHANDLE: {
1400 xfs_fsop_handlereq_t hreq;
1402 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1403 return -XFS_ERROR(EFAULT);
1404 return xfs_find_handle(cmd, &hreq);
1406 case XFS_IOC_OPEN_BY_HANDLE: {
1407 xfs_fsop_handlereq_t hreq;
1409 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1410 return -XFS_ERROR(EFAULT);
1411 return xfs_open_by_handle(filp, &hreq);
1413 case XFS_IOC_FSSETDM_BY_HANDLE:
1414 return xfs_fssetdm_by_handle(filp, arg);
1416 case XFS_IOC_READLINK_BY_HANDLE: {
1417 xfs_fsop_handlereq_t hreq;
1419 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1420 return -XFS_ERROR(EFAULT);
1421 return xfs_readlink_by_handle(filp, &hreq);
1423 case XFS_IOC_ATTRLIST_BY_HANDLE:
1424 return xfs_attrlist_by_handle(filp, arg);
1426 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1427 return xfs_attrmulti_by_handle(filp, arg);
1429 case XFS_IOC_SWAPEXT: {
1430 struct xfs_swapext sxp;
1432 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1433 return -XFS_ERROR(EFAULT);
1434 error = xfs_swapext(&sxp);
1438 case XFS_IOC_FSCOUNTS: {
1439 xfs_fsop_counts_t out;
1441 error = xfs_fs_counts(mp, &out);
1445 if (copy_to_user(arg, &out, sizeof(out)))
1446 return -XFS_ERROR(EFAULT);
1450 case XFS_IOC_SET_RESBLKS: {
1451 xfs_fsop_resblks_t inout;
1454 if (!capable(CAP_SYS_ADMIN))
1457 if (mp->m_flags & XFS_MOUNT_RDONLY)
1458 return -XFS_ERROR(EROFS);
1460 if (copy_from_user(&inout, arg, sizeof(inout)))
1461 return -XFS_ERROR(EFAULT);
1463 /* input parameter is passed in resblks field of structure */
1465 error = xfs_reserve_blocks(mp, &in, &inout);
1469 if (copy_to_user(arg, &inout, sizeof(inout)))
1470 return -XFS_ERROR(EFAULT);
1474 case XFS_IOC_GET_RESBLKS: {
1475 xfs_fsop_resblks_t out;
1477 if (!capable(CAP_SYS_ADMIN))
1480 error = xfs_reserve_blocks(mp, NULL, &out);
1484 if (copy_to_user(arg, &out, sizeof(out)))
1485 return -XFS_ERROR(EFAULT);
1490 case XFS_IOC_FSGROWFSDATA: {
1491 xfs_growfs_data_t in;
1493 if (copy_from_user(&in, arg, sizeof(in)))
1494 return -XFS_ERROR(EFAULT);
1496 error = xfs_growfs_data(mp, &in);
1500 case XFS_IOC_FSGROWFSLOG: {
1501 xfs_growfs_log_t in;
1503 if (copy_from_user(&in, arg, sizeof(in)))
1504 return -XFS_ERROR(EFAULT);
1506 error = xfs_growfs_log(mp, &in);
1510 case XFS_IOC_FSGROWFSRT: {
1513 if (copy_from_user(&in, arg, sizeof(in)))
1514 return -XFS_ERROR(EFAULT);
1516 error = xfs_growfs_rt(mp, &in);
1520 case XFS_IOC_GOINGDOWN: {
1523 if (!capable(CAP_SYS_ADMIN))
1526 if (get_user(in, (__uint32_t __user *)arg))
1527 return -XFS_ERROR(EFAULT);
1529 error = xfs_fs_goingdown(mp, in);
1533 case XFS_IOC_ERROR_INJECTION: {
1534 xfs_error_injection_t in;
1536 if (!capable(CAP_SYS_ADMIN))
1539 if (copy_from_user(&in, arg, sizeof(in)))
1540 return -XFS_ERROR(EFAULT);
1542 error = xfs_errortag_add(in.errtag, mp);
1546 case XFS_IOC_ERROR_CLEARALL:
1547 if (!capable(CAP_SYS_ADMIN))
1550 error = xfs_errortag_clearall(mp, 1);