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/slab.h>
62 #include <linux/exportfs.h>
65 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
66 * a file or fs handle.
68 * XFS_IOC_PATH_TO_FSHANDLE
69 * returns fs handle for a mount point or path within that mount point
70 * XFS_IOC_FD_TO_HANDLE
71 * returns full handle for a FD opened in user space
72 * XFS_IOC_PATH_TO_HANDLE
73 * returns full handle for a path
78 xfs_fsop_handlereq_t *hreq)
83 struct file *file = NULL;
88 if (cmd == XFS_IOC_FD_TO_HANDLE) {
89 file = fget(hreq->fd);
92 inode = file->f_path.dentry->d_inode;
94 error = user_lpath((const char __user *)hreq->path, &path);
97 inode = path.dentry->d_inode;
102 * We can only generate handles for inodes residing on a XFS filesystem,
103 * and only for regular files, directories or symbolic links.
106 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
110 if (!S_ISREG(inode->i_mode) &&
111 !S_ISDIR(inode->i_mode) &&
112 !S_ISLNK(inode->i_mode))
116 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
118 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
120 * This handle only contains an fsid, zero the rest.
122 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
123 hsize = sizeof(xfs_fsid_t);
127 lock_mode = xfs_ilock_map_shared(ip);
128 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
129 sizeof(handle.ha_fid.fid_len);
130 handle.ha_fid.fid_pad = 0;
131 handle.ha_fid.fid_gen = ip->i_d.di_gen;
132 handle.ha_fid.fid_ino = ip->i_ino;
133 xfs_iunlock_map_shared(ip, lock_mode);
135 hsize = XFS_HSIZE(handle);
139 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
140 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
146 if (cmd == XFS_IOC_FD_TO_HANDLE)
154 * No need to do permission checks on the various pathname components
155 * as the handle operations are privileged.
158 xfs_handle_acceptable(
160 struct dentry *dentry)
166 * Convert userspace handle data into a dentry.
169 xfs_handle_to_dentry(
170 struct file *parfilp,
171 void __user *uhandle,
175 struct xfs_fid64 fid;
178 * Only allow handle opens under a directory.
180 if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode))
181 return ERR_PTR(-ENOTDIR);
183 if (hlen != sizeof(xfs_handle_t))
184 return ERR_PTR(-EINVAL);
185 if (copy_from_user(&handle, uhandle, hlen))
186 return ERR_PTR(-EFAULT);
187 if (handle.ha_fid.fid_len !=
188 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
189 return ERR_PTR(-EINVAL);
191 memset(&fid, 0, sizeof(struct fid));
192 fid.ino = handle.ha_fid.fid_ino;
193 fid.gen = handle.ha_fid.fid_gen;
195 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
196 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
197 xfs_handle_acceptable, NULL);
200 STATIC struct dentry *
201 xfs_handlereq_to_dentry(
202 struct file *parfilp,
203 xfs_fsop_handlereq_t *hreq)
205 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
210 struct file *parfilp,
211 xfs_fsop_handlereq_t *hreq)
213 const struct cred *cred = current_cred();
219 struct dentry *dentry;
221 if (!capable(CAP_SYS_ADMIN))
222 return -XFS_ERROR(EPERM);
224 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
226 return PTR_ERR(dentry);
227 inode = dentry->d_inode;
229 /* Restrict xfs_open_by_handle to directories & regular files. */
230 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
231 error = -XFS_ERROR(EPERM);
235 #if BITS_PER_LONG != 32
236 hreq->oflags |= O_LARGEFILE;
239 /* Put open permission in namei format. */
240 permflag = hreq->oflags;
241 if ((permflag+1) & O_ACCMODE)
243 if (permflag & O_TRUNC)
246 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
247 (permflag & FMODE_WRITE) && IS_APPEND(inode)) {
248 error = -XFS_ERROR(EPERM);
252 if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
253 error = -XFS_ERROR(EACCES);
257 /* Can't write directories. */
258 if (S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) {
259 error = -XFS_ERROR(EISDIR);
263 fd = get_unused_fd();
269 filp = dentry_open(dentry, mntget(parfilp->f_path.mnt),
273 return PTR_ERR(filp);
276 if (inode->i_mode & S_IFREG) {
277 filp->f_flags |= O_NOATIME;
278 filp->f_mode |= FMODE_NOCMTIME;
281 fd_install(fd, filp);
290 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
291 * unused first argument.
306 if (len > (unsigned) buflen)
308 if (copy_to_user(buffer, link, len))
316 xfs_readlink_by_handle(
317 struct file *parfilp,
318 xfs_fsop_handlereq_t *hreq)
320 struct dentry *dentry;
325 if (!capable(CAP_SYS_ADMIN))
326 return -XFS_ERROR(EPERM);
328 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
330 return PTR_ERR(dentry);
332 /* Restrict this handle operation to symlinks only. */
333 if (!S_ISLNK(dentry->d_inode->i_mode)) {
334 error = -XFS_ERROR(EINVAL);
338 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
339 error = -XFS_ERROR(EFAULT);
343 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
345 error = -XFS_ERROR(ENOMEM);
349 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
352 error = do_readlink(hreq->ohandle, olen, link);
364 xfs_fssetdm_by_handle(
365 struct file *parfilp,
369 struct fsdmidata fsd;
370 xfs_fsop_setdm_handlereq_t dmhreq;
371 struct dentry *dentry;
373 if (!capable(CAP_MKNOD))
374 return -XFS_ERROR(EPERM);
375 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
376 return -XFS_ERROR(EFAULT);
378 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
380 return PTR_ERR(dentry);
382 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
383 error = -XFS_ERROR(EPERM);
387 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
388 error = -XFS_ERROR(EFAULT);
392 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
401 xfs_attrlist_by_handle(
402 struct file *parfilp,
406 attrlist_cursor_kern_t *cursor;
407 xfs_fsop_attrlist_handlereq_t al_hreq;
408 struct dentry *dentry;
411 if (!capable(CAP_SYS_ADMIN))
412 return -XFS_ERROR(EPERM);
413 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
414 return -XFS_ERROR(EFAULT);
415 if (al_hreq.buflen > XATTR_LIST_MAX)
416 return -XFS_ERROR(EINVAL);
419 * Reject flags, only allow namespaces.
421 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
422 return -XFS_ERROR(EINVAL);
424 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
426 return PTR_ERR(dentry);
428 kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL);
432 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
433 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
434 al_hreq.flags, cursor);
438 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
449 xfs_attrmulti_attr_get(
452 unsigned char __user *ubuf,
459 if (*len > XATTR_SIZE_MAX)
461 kbuf = kmalloc(*len, GFP_KERNEL);
465 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
469 if (copy_to_user(ubuf, kbuf, *len))
478 xfs_attrmulti_attr_set(
481 const unsigned char __user *ubuf,
488 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
490 if (len > XATTR_SIZE_MAX)
493 kbuf = memdup_user(ubuf, len);
495 return PTR_ERR(kbuf);
497 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
503 xfs_attrmulti_attr_remove(
508 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
510 return xfs_attr_remove(XFS_I(inode), name, flags);
514 xfs_attrmulti_by_handle(
515 struct file *parfilp,
519 xfs_attr_multiop_t *ops;
520 xfs_fsop_attrmulti_handlereq_t am_hreq;
521 struct dentry *dentry;
522 unsigned int i, size;
523 unsigned char *attr_name;
525 if (!capable(CAP_SYS_ADMIN))
526 return -XFS_ERROR(EPERM);
527 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
528 return -XFS_ERROR(EFAULT);
531 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
534 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
536 return PTR_ERR(dentry);
539 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
540 if (!size || size > 16 * PAGE_SIZE)
543 ops = memdup_user(am_hreq.ops, size);
545 error = PTR_ERR(ops);
549 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
554 for (i = 0; i < am_hreq.opcount; i++) {
555 ops[i].am_error = strncpy_from_user((char *)attr_name,
556 ops[i].am_attrname, MAXNAMELEN);
557 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
559 if (ops[i].am_error < 0)
562 switch (ops[i].am_opcode) {
564 ops[i].am_error = xfs_attrmulti_attr_get(
565 dentry->d_inode, attr_name,
566 ops[i].am_attrvalue, &ops[i].am_length,
570 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
573 ops[i].am_error = xfs_attrmulti_attr_set(
574 dentry->d_inode, attr_name,
575 ops[i].am_attrvalue, ops[i].am_length,
577 mnt_drop_write(parfilp->f_path.mnt);
580 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
583 ops[i].am_error = xfs_attrmulti_attr_remove(
584 dentry->d_inode, attr_name,
586 mnt_drop_write(parfilp->f_path.mnt);
589 ops[i].am_error = EINVAL;
593 if (copy_to_user(am_hreq.ops, ops, size))
594 error = XFS_ERROR(EFAULT);
606 struct xfs_inode *ip,
617 * Only allow the sys admin to reserve space unless
618 * unwritten extents are enabled.
620 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
621 !capable(CAP_SYS_ADMIN))
622 return -XFS_ERROR(EPERM);
624 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
625 return -XFS_ERROR(EPERM);
627 if (!(filp->f_mode & FMODE_WRITE))
628 return -XFS_ERROR(EBADF);
630 if (!S_ISREG(inode->i_mode))
631 return -XFS_ERROR(EINVAL);
633 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
634 attr_flags |= XFS_ATTR_NONBLOCK;
635 if (ioflags & IO_INVIS)
636 attr_flags |= XFS_ATTR_DMI;
638 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
648 xfs_fsop_bulkreq_t bulkreq;
649 int count; /* # of records returned */
650 xfs_ino_t inlast; /* last inode number */
654 /* done = 1 if there are more stats to get and if bulkstat */
655 /* should be called again (unused here, but used in dmapi) */
657 if (!capable(CAP_SYS_ADMIN))
660 if (XFS_FORCED_SHUTDOWN(mp))
661 return -XFS_ERROR(EIO);
663 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
664 return -XFS_ERROR(EFAULT);
666 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
667 return -XFS_ERROR(EFAULT);
669 if ((count = bulkreq.icount) <= 0)
670 return -XFS_ERROR(EINVAL);
672 if (bulkreq.ubuffer == NULL)
673 return -XFS_ERROR(EINVAL);
675 if (cmd == XFS_IOC_FSINUMBERS)
676 error = xfs_inumbers(mp, &inlast, &count,
677 bulkreq.ubuffer, xfs_inumbers_fmt);
678 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
679 error = xfs_bulkstat_single(mp, &inlast,
680 bulkreq.ubuffer, &done);
681 else /* XFS_IOC_FSBULKSTAT */
682 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
683 sizeof(xfs_bstat_t), bulkreq.ubuffer,
689 if (bulkreq.ocount != NULL) {
690 if (copy_to_user(bulkreq.lastip, &inlast,
692 return -XFS_ERROR(EFAULT);
694 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
695 return -XFS_ERROR(EFAULT);
702 xfs_ioc_fsgeometry_v1(
706 xfs_fsop_geom_v1_t fsgeo;
709 error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3);
713 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
714 return -XFS_ERROR(EFAULT);
723 xfs_fsop_geom_t fsgeo;
726 error = xfs_fs_geometry(mp, &fsgeo, 4);
730 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
731 return -XFS_ERROR(EFAULT);
736 * Linux extended inode flags interface.
740 xfs_merge_ioc_xflags(
744 unsigned int xflags = start;
746 if (flags & FS_IMMUTABLE_FL)
747 xflags |= XFS_XFLAG_IMMUTABLE;
749 xflags &= ~XFS_XFLAG_IMMUTABLE;
750 if (flags & FS_APPEND_FL)
751 xflags |= XFS_XFLAG_APPEND;
753 xflags &= ~XFS_XFLAG_APPEND;
754 if (flags & FS_SYNC_FL)
755 xflags |= XFS_XFLAG_SYNC;
757 xflags &= ~XFS_XFLAG_SYNC;
758 if (flags & FS_NOATIME_FL)
759 xflags |= XFS_XFLAG_NOATIME;
761 xflags &= ~XFS_XFLAG_NOATIME;
762 if (flags & FS_NODUMP_FL)
763 xflags |= XFS_XFLAG_NODUMP;
765 xflags &= ~XFS_XFLAG_NODUMP;
774 unsigned int flags = 0;
776 if (di_flags & XFS_DIFLAG_IMMUTABLE)
777 flags |= FS_IMMUTABLE_FL;
778 if (di_flags & XFS_DIFLAG_APPEND)
779 flags |= FS_APPEND_FL;
780 if (di_flags & XFS_DIFLAG_SYNC)
782 if (di_flags & XFS_DIFLAG_NOATIME)
783 flags |= FS_NOATIME_FL;
784 if (di_flags & XFS_DIFLAG_NODUMP)
785 flags |= FS_NODUMP_FL;
797 xfs_ilock(ip, XFS_ILOCK_SHARED);
798 fa.fsx_xflags = xfs_ip2xflags(ip);
799 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
800 fa.fsx_projid = ip->i_d.di_projid;
804 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
805 fa.fsx_nextents = ip->i_afp->if_bytes /
806 sizeof(xfs_bmbt_rec_t);
808 fa.fsx_nextents = ip->i_d.di_anextents;
812 if (ip->i_df.if_flags & XFS_IFEXTENTS)
813 fa.fsx_nextents = ip->i_df.if_bytes /
814 sizeof(xfs_bmbt_rec_t);
816 fa.fsx_nextents = ip->i_d.di_nextents;
818 xfs_iunlock(ip, XFS_ILOCK_SHARED);
820 if (copy_to_user(arg, &fa, sizeof(fa)))
827 struct xfs_inode *ip,
830 unsigned int di_flags;
832 /* can't set PREALLOC this way, just preserve it */
833 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
834 if (xflags & XFS_XFLAG_IMMUTABLE)
835 di_flags |= XFS_DIFLAG_IMMUTABLE;
836 if (xflags & XFS_XFLAG_APPEND)
837 di_flags |= XFS_DIFLAG_APPEND;
838 if (xflags & XFS_XFLAG_SYNC)
839 di_flags |= XFS_DIFLAG_SYNC;
840 if (xflags & XFS_XFLAG_NOATIME)
841 di_flags |= XFS_DIFLAG_NOATIME;
842 if (xflags & XFS_XFLAG_NODUMP)
843 di_flags |= XFS_DIFLAG_NODUMP;
844 if (xflags & XFS_XFLAG_PROJINHERIT)
845 di_flags |= XFS_DIFLAG_PROJINHERIT;
846 if (xflags & XFS_XFLAG_NODEFRAG)
847 di_flags |= XFS_DIFLAG_NODEFRAG;
848 if (xflags & XFS_XFLAG_FILESTREAM)
849 di_flags |= XFS_DIFLAG_FILESTREAM;
850 if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
851 if (xflags & XFS_XFLAG_RTINHERIT)
852 di_flags |= XFS_DIFLAG_RTINHERIT;
853 if (xflags & XFS_XFLAG_NOSYMLINKS)
854 di_flags |= XFS_DIFLAG_NOSYMLINKS;
855 if (xflags & XFS_XFLAG_EXTSZINHERIT)
856 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
857 } else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) {
858 if (xflags & XFS_XFLAG_REALTIME)
859 di_flags |= XFS_DIFLAG_REALTIME;
860 if (xflags & XFS_XFLAG_EXTSIZE)
861 di_flags |= XFS_DIFLAG_EXTSIZE;
864 ip->i_d.di_flags = di_flags;
868 xfs_diflags_to_linux(
869 struct xfs_inode *ip)
871 struct inode *inode = VFS_I(ip);
872 unsigned int xflags = xfs_ip2xflags(ip);
874 if (xflags & XFS_XFLAG_IMMUTABLE)
875 inode->i_flags |= S_IMMUTABLE;
877 inode->i_flags &= ~S_IMMUTABLE;
878 if (xflags & XFS_XFLAG_APPEND)
879 inode->i_flags |= S_APPEND;
881 inode->i_flags &= ~S_APPEND;
882 if (xflags & XFS_XFLAG_SYNC)
883 inode->i_flags |= S_SYNC;
885 inode->i_flags &= ~S_SYNC;
886 if (xflags & XFS_XFLAG_NOATIME)
887 inode->i_flags |= S_NOATIME;
889 inode->i_flags &= ~S_NOATIME;
893 #define FSX_EXTSIZE 2
895 #define FSX_NONBLOCK 8
903 struct xfs_mount *mp = ip->i_mount;
904 struct xfs_trans *tp;
905 unsigned int lock_flags = 0;
906 struct xfs_dquot *udqp = NULL;
907 struct xfs_dquot *gdqp = NULL;
908 struct xfs_dquot *olddquot = NULL;
911 xfs_itrace_entry(ip);
913 if (mp->m_flags & XFS_MOUNT_RDONLY)
914 return XFS_ERROR(EROFS);
915 if (XFS_FORCED_SHUTDOWN(mp))
916 return XFS_ERROR(EIO);
919 * If disk quotas is on, we make sure that the dquots do exist on disk,
920 * before we start any other transactions. Trying to do this later
921 * is messy. We don't care to take a readlock to look at the ids
922 * in inode here, because we can't hold it across the trans_reserve.
923 * If the IDs do change before we take the ilock, we're covered
924 * because the i_*dquot fields will get updated anyway.
926 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
927 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
928 ip->i_d.di_gid, fa->fsx_projid,
929 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
935 * For the other attributes, we acquire the inode lock and
936 * first do an error checking pass.
938 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
939 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
943 lock_flags = XFS_ILOCK_EXCL;
944 xfs_ilock(ip, lock_flags);
947 * CAP_FOWNER overrides the following restrictions:
949 * The user ID of the calling process must be equal
950 * to the file owner ID, except in cases where the
951 * CAP_FSETID capability is applicable.
953 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
954 code = XFS_ERROR(EPERM);
959 * Do a quota reservation only if projid is actually going to change.
961 if (mask & FSX_PROJID) {
962 if (XFS_IS_QUOTA_RUNNING(mp) &&
963 XFS_IS_PQUOTA_ON(mp) &&
964 ip->i_d.di_projid != fa->fsx_projid) {
966 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
967 capable(CAP_FOWNER) ?
968 XFS_QMOPT_FORCE_RES : 0);
969 if (code) /* out of quota */
974 if (mask & FSX_EXTSIZE) {
976 * Can't change extent size if any extents are allocated.
978 if (ip->i_d.di_nextents &&
979 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
981 code = XFS_ERROR(EINVAL); /* EFBIG? */
986 * Extent size must be a multiple of the appropriate block
987 * size, if set at all.
989 if (fa->fsx_extsize != 0) {
992 if (XFS_IS_REALTIME_INODE(ip) ||
993 ((mask & FSX_XFLAGS) &&
994 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
995 size = mp->m_sb.sb_rextsize <<
996 mp->m_sb.sb_blocklog;
998 size = mp->m_sb.sb_blocksize;
1001 if (fa->fsx_extsize % size) {
1002 code = XFS_ERROR(EINVAL);
1009 if (mask & FSX_XFLAGS) {
1011 * Can't change realtime flag if any extents are allocated.
1013 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1014 (XFS_IS_REALTIME_INODE(ip)) !=
1015 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1016 code = XFS_ERROR(EINVAL); /* EFBIG? */
1021 * If realtime flag is set then must have realtime data.
1023 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1024 if ((mp->m_sb.sb_rblocks == 0) ||
1025 (mp->m_sb.sb_rextsize == 0) ||
1026 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1027 code = XFS_ERROR(EINVAL);
1033 * Can't modify an immutable/append-only file unless
1034 * we have appropriate permission.
1036 if ((ip->i_d.di_flags &
1037 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1039 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1040 !capable(CAP_LINUX_IMMUTABLE)) {
1041 code = XFS_ERROR(EPERM);
1046 xfs_trans_ijoin(tp, ip, lock_flags);
1047 xfs_trans_ihold(tp, ip);
1050 * Change file ownership. Must be the owner or privileged.
1052 if (mask & FSX_PROJID) {
1054 * CAP_FSETID overrides the following restrictions:
1056 * The set-user-ID and set-group-ID bits of a file will be
1057 * cleared upon successful return from chown()
1059 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1060 !capable(CAP_FSETID))
1061 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1064 * Change the ownerships and register quota modifications
1065 * in the transaction.
1067 if (ip->i_d.di_projid != fa->fsx_projid) {
1068 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1069 olddquot = xfs_qm_vop_chown(tp, ip,
1070 &ip->i_gdquot, gdqp);
1072 ip->i_d.di_projid = fa->fsx_projid;
1075 * We may have to rev the inode as well as
1076 * the superblock version number since projids didn't
1077 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1079 if (ip->i_d.di_version == 1)
1080 xfs_bump_ino_vers2(tp, ip);
1085 if (mask & FSX_EXTSIZE)
1086 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1087 if (mask & FSX_XFLAGS) {
1088 xfs_set_diflags(ip, fa->fsx_xflags);
1089 xfs_diflags_to_linux(ip);
1092 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1093 xfs_ichgtime(ip, XFS_ICHGTIME_CHG);
1095 XFS_STATS_INC(xs_ig_attrchg);
1098 * If this is a synchronous mount, make sure that the
1099 * transaction goes to disk before returning to the user.
1100 * This is slightly sub-optimal in that truncates require
1101 * two sync transactions instead of one for wsync filesystems.
1102 * One for the truncate and one for the timestamps since we
1103 * don't want to change the timestamps unless we're sure the
1104 * truncate worked. Truncates are less than 1% of the laddis
1105 * mix so this probably isn't worth the trouble to optimize.
1107 if (mp->m_flags & XFS_MOUNT_WSYNC)
1108 xfs_trans_set_sync(tp);
1109 code = xfs_trans_commit(tp, 0);
1110 xfs_iunlock(ip, lock_flags);
1113 * Release any dquot(s) the inode had kept before chown.
1115 xfs_qm_dqrele(olddquot);
1116 xfs_qm_dqrele(udqp);
1117 xfs_qm_dqrele(gdqp);
1122 if (DM_EVENT_ENABLED(ip, DM_EVENT_ATTRIBUTE)) {
1123 XFS_SEND_NAMESP(mp, DM_EVENT_ATTRIBUTE, ip, DM_RIGHT_NULL,
1124 NULL, DM_RIGHT_NULL, NULL, NULL, 0, 0,
1125 (mask & FSX_NONBLOCK) ? DM_FLAGS_NDELAY : 0);
1131 xfs_qm_dqrele(udqp);
1132 xfs_qm_dqrele(gdqp);
1133 xfs_trans_cancel(tp, 0);
1135 xfs_iunlock(ip, lock_flags);
1148 if (copy_from_user(&fa, arg, sizeof(fa)))
1151 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1152 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1153 mask |= FSX_NONBLOCK;
1155 return -xfs_ioctl_setattr(ip, &fa, mask);
1165 flags = xfs_di2lxflags(ip->i_d.di_flags);
1166 if (copy_to_user(arg, &flags, sizeof(flags)))
1181 if (copy_from_user(&flags, arg, sizeof(flags)))
1184 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1185 FS_NOATIME_FL | FS_NODUMP_FL | \
1190 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1191 mask |= FSX_NONBLOCK;
1192 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1194 return -xfs_ioctl_setattr(ip, &fa, mask);
1198 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1200 struct getbmap __user *base = *ap;
1202 /* copy only getbmap portion (not getbmapx) */
1203 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1204 return XFS_ERROR(EFAULT);
1206 *ap += sizeof(struct getbmap);
1212 struct xfs_inode *ip,
1217 struct getbmapx bmx;
1220 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1221 return -XFS_ERROR(EFAULT);
1223 if (bmx.bmv_count < 2)
1224 return -XFS_ERROR(EINVAL);
1226 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1227 if (ioflags & IO_INVIS)
1228 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1230 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1231 (struct getbmap *)arg+1);
1235 /* copy back header - only size of getbmap */
1236 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1237 return -XFS_ERROR(EFAULT);
1242 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1244 struct getbmapx __user *base = *ap;
1246 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1247 return XFS_ERROR(EFAULT);
1249 *ap += sizeof(struct getbmapx);
1255 struct xfs_inode *ip,
1258 struct getbmapx bmx;
1261 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1262 return -XFS_ERROR(EFAULT);
1264 if (bmx.bmv_count < 2)
1265 return -XFS_ERROR(EINVAL);
1267 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1268 return -XFS_ERROR(EINVAL);
1270 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1271 (struct getbmapx *)arg+1);
1275 /* copy back header */
1276 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1277 return -XFS_ERROR(EFAULT);
1283 * Note: some of the ioctl's return positive numbers as a
1284 * byte count indicating success, such as readlink_by_handle.
1285 * So we don't "sign flip" like most other routines. This means
1286 * true errors need to be returned as a negative value.
1294 struct inode *inode = filp->f_path.dentry->d_inode;
1295 struct xfs_inode *ip = XFS_I(inode);
1296 struct xfs_mount *mp = ip->i_mount;
1297 void __user *arg = (void __user *)p;
1301 if (filp->f_mode & FMODE_NOCMTIME)
1302 ioflags |= IO_INVIS;
1304 xfs_itrace_entry(ip);
1307 case XFS_IOC_ALLOCSP:
1308 case XFS_IOC_FREESP:
1309 case XFS_IOC_RESVSP:
1310 case XFS_IOC_UNRESVSP:
1311 case XFS_IOC_ALLOCSP64:
1312 case XFS_IOC_FREESP64:
1313 case XFS_IOC_RESVSP64:
1314 case XFS_IOC_UNRESVSP64: {
1317 if (copy_from_user(&bf, arg, sizeof(bf)))
1318 return -XFS_ERROR(EFAULT);
1319 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1321 case XFS_IOC_DIOINFO: {
1323 xfs_buftarg_t *target =
1324 XFS_IS_REALTIME_INODE(ip) ?
1325 mp->m_rtdev_targp : mp->m_ddev_targp;
1327 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1328 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1330 if (copy_to_user(arg, &da, sizeof(da)))
1331 return -XFS_ERROR(EFAULT);
1335 case XFS_IOC_FSBULKSTAT_SINGLE:
1336 case XFS_IOC_FSBULKSTAT:
1337 case XFS_IOC_FSINUMBERS:
1338 return xfs_ioc_bulkstat(mp, cmd, arg);
1340 case XFS_IOC_FSGEOMETRY_V1:
1341 return xfs_ioc_fsgeometry_v1(mp, arg);
1343 case XFS_IOC_FSGEOMETRY:
1344 return xfs_ioc_fsgeometry(mp, arg);
1346 case XFS_IOC_GETVERSION:
1347 return put_user(inode->i_generation, (int __user *)arg);
1349 case XFS_IOC_FSGETXATTR:
1350 return xfs_ioc_fsgetxattr(ip, 0, arg);
1351 case XFS_IOC_FSGETXATTRA:
1352 return xfs_ioc_fsgetxattr(ip, 1, arg);
1353 case XFS_IOC_FSSETXATTR:
1354 return xfs_ioc_fssetxattr(ip, filp, arg);
1355 case XFS_IOC_GETXFLAGS:
1356 return xfs_ioc_getxflags(ip, arg);
1357 case XFS_IOC_SETXFLAGS:
1358 return xfs_ioc_setxflags(ip, filp, arg);
1360 case XFS_IOC_FSSETDM: {
1361 struct fsdmidata dmi;
1363 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1364 return -XFS_ERROR(EFAULT);
1366 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1371 case XFS_IOC_GETBMAP:
1372 case XFS_IOC_GETBMAPA:
1373 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1375 case XFS_IOC_GETBMAPX:
1376 return xfs_ioc_getbmapx(ip, arg);
1378 case XFS_IOC_FD_TO_HANDLE:
1379 case XFS_IOC_PATH_TO_HANDLE:
1380 case XFS_IOC_PATH_TO_FSHANDLE: {
1381 xfs_fsop_handlereq_t hreq;
1383 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1384 return -XFS_ERROR(EFAULT);
1385 return xfs_find_handle(cmd, &hreq);
1387 case XFS_IOC_OPEN_BY_HANDLE: {
1388 xfs_fsop_handlereq_t hreq;
1390 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1391 return -XFS_ERROR(EFAULT);
1392 return xfs_open_by_handle(filp, &hreq);
1394 case XFS_IOC_FSSETDM_BY_HANDLE:
1395 return xfs_fssetdm_by_handle(filp, arg);
1397 case XFS_IOC_READLINK_BY_HANDLE: {
1398 xfs_fsop_handlereq_t hreq;
1400 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1401 return -XFS_ERROR(EFAULT);
1402 return xfs_readlink_by_handle(filp, &hreq);
1404 case XFS_IOC_ATTRLIST_BY_HANDLE:
1405 return xfs_attrlist_by_handle(filp, arg);
1407 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1408 return xfs_attrmulti_by_handle(filp, arg);
1410 case XFS_IOC_SWAPEXT: {
1411 struct xfs_swapext sxp;
1413 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1414 return -XFS_ERROR(EFAULT);
1415 error = xfs_swapext(&sxp);
1419 case XFS_IOC_FSCOUNTS: {
1420 xfs_fsop_counts_t out;
1422 error = xfs_fs_counts(mp, &out);
1426 if (copy_to_user(arg, &out, sizeof(out)))
1427 return -XFS_ERROR(EFAULT);
1431 case XFS_IOC_SET_RESBLKS: {
1432 xfs_fsop_resblks_t inout;
1435 if (!capable(CAP_SYS_ADMIN))
1438 if (mp->m_flags & XFS_MOUNT_RDONLY)
1439 return -XFS_ERROR(EROFS);
1441 if (copy_from_user(&inout, arg, sizeof(inout)))
1442 return -XFS_ERROR(EFAULT);
1444 /* input parameter is passed in resblks field of structure */
1446 error = xfs_reserve_blocks(mp, &in, &inout);
1450 if (copy_to_user(arg, &inout, sizeof(inout)))
1451 return -XFS_ERROR(EFAULT);
1455 case XFS_IOC_GET_RESBLKS: {
1456 xfs_fsop_resblks_t out;
1458 if (!capable(CAP_SYS_ADMIN))
1461 error = xfs_reserve_blocks(mp, NULL, &out);
1465 if (copy_to_user(arg, &out, sizeof(out)))
1466 return -XFS_ERROR(EFAULT);
1471 case XFS_IOC_FSGROWFSDATA: {
1472 xfs_growfs_data_t in;
1474 if (copy_from_user(&in, arg, sizeof(in)))
1475 return -XFS_ERROR(EFAULT);
1477 error = xfs_growfs_data(mp, &in);
1481 case XFS_IOC_FSGROWFSLOG: {
1482 xfs_growfs_log_t in;
1484 if (copy_from_user(&in, arg, sizeof(in)))
1485 return -XFS_ERROR(EFAULT);
1487 error = xfs_growfs_log(mp, &in);
1491 case XFS_IOC_FSGROWFSRT: {
1494 if (copy_from_user(&in, arg, sizeof(in)))
1495 return -XFS_ERROR(EFAULT);
1497 error = xfs_growfs_rt(mp, &in);
1501 case XFS_IOC_GOINGDOWN: {
1504 if (!capable(CAP_SYS_ADMIN))
1507 if (get_user(in, (__uint32_t __user *)arg))
1508 return -XFS_ERROR(EFAULT);
1510 error = xfs_fs_goingdown(mp, in);
1514 case XFS_IOC_ERROR_INJECTION: {
1515 xfs_error_injection_t in;
1517 if (!capable(CAP_SYS_ADMIN))
1520 if (copy_from_user(&in, arg, sizeof(in)))
1521 return -XFS_ERROR(EFAULT);
1523 error = xfs_errortag_add(in.errtag, mp);
1527 case XFS_IOC_ERROR_CLEARALL:
1528 if (!capable(CAP_SYS_ADMIN))
1531 error = xfs_errortag_clearall(mp, 1);