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
21 #include "xfs_trans.h"
24 #include "xfs_alloc.h"
25 #include "xfs_mount.h"
26 #include "xfs_bmap_btree.h"
27 #include "xfs_dinode.h"
28 #include "xfs_inode.h"
29 #include "xfs_ioctl.h"
30 #include "xfs_rtalloc.h"
31 #include "xfs_itable.h"
32 #include "xfs_error.h"
35 #include "xfs_buf_item.h"
36 #include "xfs_utils.h"
37 #include "xfs_dfrag.h"
38 #include "xfs_fsops.h"
39 #include "xfs_vnodeops.h"
40 #include "xfs_discard.h"
41 #include "xfs_quota.h"
42 #include "xfs_inode_item.h"
43 #include "xfs_export.h"
44 #include "xfs_trace.h"
45 #include "xfs_icache.h"
47 #include <linux/capability.h>
48 #include <linux/dcache.h>
49 #include <linux/mount.h>
50 #include <linux/namei.h>
51 #include <linux/pagemap.h>
52 #include <linux/slab.h>
53 #include <linux/exportfs.h>
56 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
57 * a file or fs handle.
59 * XFS_IOC_PATH_TO_FSHANDLE
60 * returns fs handle for a mount point or path within that mount point
61 * XFS_IOC_FD_TO_HANDLE
62 * returns full handle for a FD opened in user space
63 * XFS_IOC_PATH_TO_HANDLE
64 * returns full handle for a path
69 xfs_fsop_handlereq_t *hreq)
79 if (cmd == XFS_IOC_FD_TO_HANDLE) {
83 inode = file_inode(f.file);
85 error = user_lpath((const char __user *)hreq->path, &path);
88 inode = path.dentry->d_inode;
93 * We can only generate handles for inodes residing on a XFS filesystem,
94 * and only for regular files, directories or symbolic links.
97 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
101 if (!S_ISREG(inode->i_mode) &&
102 !S_ISDIR(inode->i_mode) &&
103 !S_ISLNK(inode->i_mode))
107 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
109 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
111 * This handle only contains an fsid, zero the rest.
113 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
114 hsize = sizeof(xfs_fsid_t);
118 lock_mode = xfs_ilock_map_shared(ip);
119 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
120 sizeof(handle.ha_fid.fid_len);
121 handle.ha_fid.fid_pad = 0;
122 handle.ha_fid.fid_gen = ip->i_d.di_gen;
123 handle.ha_fid.fid_ino = ip->i_ino;
124 xfs_iunlock_map_shared(ip, lock_mode);
126 hsize = XFS_HSIZE(handle);
130 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
131 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
137 if (cmd == XFS_IOC_FD_TO_HANDLE)
145 * No need to do permission checks on the various pathname components
146 * as the handle operations are privileged.
149 xfs_handle_acceptable(
151 struct dentry *dentry)
157 * Convert userspace handle data into a dentry.
160 xfs_handle_to_dentry(
161 struct file *parfilp,
162 void __user *uhandle,
166 struct xfs_fid64 fid;
169 * Only allow handle opens under a directory.
171 if (!S_ISDIR(file_inode(parfilp)->i_mode))
172 return ERR_PTR(-ENOTDIR);
174 if (hlen != sizeof(xfs_handle_t))
175 return ERR_PTR(-EINVAL);
176 if (copy_from_user(&handle, uhandle, hlen))
177 return ERR_PTR(-EFAULT);
178 if (handle.ha_fid.fid_len !=
179 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
180 return ERR_PTR(-EINVAL);
182 memset(&fid, 0, sizeof(struct fid));
183 fid.ino = handle.ha_fid.fid_ino;
184 fid.gen = handle.ha_fid.fid_gen;
186 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
187 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
188 xfs_handle_acceptable, NULL);
191 STATIC struct dentry *
192 xfs_handlereq_to_dentry(
193 struct file *parfilp,
194 xfs_fsop_handlereq_t *hreq)
196 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
201 struct file *parfilp,
202 xfs_fsop_handlereq_t *hreq)
204 const struct cred *cred = current_cred();
210 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 path.mnt = parfilp->f_path.mnt;
258 path.dentry = dentry;
259 filp = dentry_open(&path, hreq->oflags, cred);
263 return PTR_ERR(filp);
266 if (S_ISREG(inode->i_mode)) {
267 filp->f_flags |= O_NOATIME;
268 filp->f_mode |= FMODE_NOCMTIME;
271 fd_install(fd, filp);
280 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
281 * unused first argument.
296 if (len > (unsigned) buflen)
298 if (copy_to_user(buffer, link, len))
306 xfs_readlink_by_handle(
307 struct file *parfilp,
308 xfs_fsop_handlereq_t *hreq)
310 struct dentry *dentry;
315 if (!capable(CAP_SYS_ADMIN))
316 return -XFS_ERROR(EPERM);
318 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
320 return PTR_ERR(dentry);
322 /* Restrict this handle operation to symlinks only. */
323 if (!S_ISLNK(dentry->d_inode->i_mode)) {
324 error = -XFS_ERROR(EINVAL);
328 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
329 error = -XFS_ERROR(EFAULT);
333 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
335 error = -XFS_ERROR(ENOMEM);
339 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
342 error = do_readlink(hreq->ohandle, olen, link);
354 xfs_fssetdm_by_handle(
355 struct file *parfilp,
359 struct fsdmidata fsd;
360 xfs_fsop_setdm_handlereq_t dmhreq;
361 struct dentry *dentry;
363 if (!capable(CAP_MKNOD))
364 return -XFS_ERROR(EPERM);
365 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
366 return -XFS_ERROR(EFAULT);
368 error = mnt_want_write_file(parfilp);
372 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
373 if (IS_ERR(dentry)) {
374 mnt_drop_write_file(parfilp);
375 return PTR_ERR(dentry);
378 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
379 error = -XFS_ERROR(EPERM);
383 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
384 error = -XFS_ERROR(EFAULT);
388 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
392 mnt_drop_write_file(parfilp);
398 xfs_attrlist_by_handle(
399 struct file *parfilp,
403 attrlist_cursor_kern_t *cursor;
404 xfs_fsop_attrlist_handlereq_t al_hreq;
405 struct dentry *dentry;
408 if (!capable(CAP_SYS_ADMIN))
409 return -XFS_ERROR(EPERM);
410 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
411 return -XFS_ERROR(EFAULT);
412 if (al_hreq.buflen < sizeof(struct attrlist) ||
413 al_hreq.buflen > XATTR_LIST_MAX)
414 return -XFS_ERROR(EINVAL);
417 * Reject flags, only allow namespaces.
419 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
420 return -XFS_ERROR(EINVAL);
422 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
424 return PTR_ERR(dentry);
426 kbuf = kmem_zalloc(al_hreq.buflen, KM_SLEEP | KM_MAYFAIL);
428 kbuf = kmem_zalloc_large(al_hreq.buflen);
433 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
434 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
435 al_hreq.flags, cursor);
439 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
443 if (is_vmalloc_addr(kbuf))
444 kmem_free_large(kbuf);
453 xfs_attrmulti_attr_get(
456 unsigned char __user *ubuf,
463 if (*len > XATTR_SIZE_MAX)
465 kbuf = kmem_zalloc(*len, KM_SLEEP | KM_MAYFAIL);
467 kbuf = kmem_zalloc_large(*len);
472 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
476 if (copy_to_user(ubuf, kbuf, *len))
480 if (is_vmalloc_addr(kbuf))
481 kmem_free_large(kbuf);
488 xfs_attrmulti_attr_set(
491 const unsigned char __user *ubuf,
498 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
500 if (len > XATTR_SIZE_MAX)
503 kbuf = memdup_user(ubuf, len);
505 return PTR_ERR(kbuf);
507 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
513 xfs_attrmulti_attr_remove(
518 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
520 return xfs_attr_remove(XFS_I(inode), name, flags);
524 xfs_attrmulti_by_handle(
525 struct file *parfilp,
529 xfs_attr_multiop_t *ops;
530 xfs_fsop_attrmulti_handlereq_t am_hreq;
531 struct dentry *dentry;
532 unsigned int i, size;
533 unsigned char *attr_name;
535 if (!capable(CAP_SYS_ADMIN))
536 return -XFS_ERROR(EPERM);
537 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
538 return -XFS_ERROR(EFAULT);
541 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
544 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
546 return PTR_ERR(dentry);
549 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
550 if (!size || size > 16 * PAGE_SIZE)
553 ops = memdup_user(am_hreq.ops, size);
555 error = PTR_ERR(ops);
559 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
564 for (i = 0; i < am_hreq.opcount; i++) {
565 ops[i].am_error = strncpy_from_user((char *)attr_name,
566 ops[i].am_attrname, MAXNAMELEN);
567 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
569 if (ops[i].am_error < 0)
572 switch (ops[i].am_opcode) {
574 ops[i].am_error = xfs_attrmulti_attr_get(
575 dentry->d_inode, attr_name,
576 ops[i].am_attrvalue, &ops[i].am_length,
580 ops[i].am_error = mnt_want_write_file(parfilp);
583 ops[i].am_error = xfs_attrmulti_attr_set(
584 dentry->d_inode, attr_name,
585 ops[i].am_attrvalue, ops[i].am_length,
587 mnt_drop_write_file(parfilp);
590 ops[i].am_error = mnt_want_write_file(parfilp);
593 ops[i].am_error = xfs_attrmulti_attr_remove(
594 dentry->d_inode, attr_name,
596 mnt_drop_write_file(parfilp);
599 ops[i].am_error = EINVAL;
603 if (copy_to_user(am_hreq.ops, ops, size))
604 error = XFS_ERROR(EFAULT);
616 struct xfs_inode *ip,
627 * Only allow the sys admin to reserve space unless
628 * unwritten extents are enabled.
630 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
631 !capable(CAP_SYS_ADMIN))
632 return -XFS_ERROR(EPERM);
634 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
635 return -XFS_ERROR(EPERM);
637 if (!(filp->f_mode & FMODE_WRITE))
638 return -XFS_ERROR(EBADF);
640 if (!S_ISREG(inode->i_mode))
641 return -XFS_ERROR(EINVAL);
643 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
644 attr_flags |= XFS_ATTR_NONBLOCK;
646 if (filp->f_flags & O_DSYNC)
647 attr_flags |= XFS_ATTR_SYNC;
649 if (ioflags & IO_INVIS)
650 attr_flags |= XFS_ATTR_DMI;
652 error = mnt_want_write_file(filp);
655 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
656 mnt_drop_write_file(filp);
666 xfs_fsop_bulkreq_t bulkreq;
667 int count; /* # of records returned */
668 xfs_ino_t inlast; /* last inode number */
672 /* done = 1 if there are more stats to get and if bulkstat */
673 /* should be called again (unused here, but used in dmapi) */
675 if (!capable(CAP_SYS_ADMIN))
678 if (XFS_FORCED_SHUTDOWN(mp))
679 return -XFS_ERROR(EIO);
681 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
682 return -XFS_ERROR(EFAULT);
684 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
685 return -XFS_ERROR(EFAULT);
687 if ((count = bulkreq.icount) <= 0)
688 return -XFS_ERROR(EINVAL);
690 if (bulkreq.ubuffer == NULL)
691 return -XFS_ERROR(EINVAL);
693 if (cmd == XFS_IOC_FSINUMBERS)
694 error = xfs_inumbers(mp, &inlast, &count,
695 bulkreq.ubuffer, xfs_inumbers_fmt);
696 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
697 error = xfs_bulkstat_single(mp, &inlast,
698 bulkreq.ubuffer, &done);
699 else /* XFS_IOC_FSBULKSTAT */
700 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
701 sizeof(xfs_bstat_t), bulkreq.ubuffer,
707 if (bulkreq.ocount != NULL) {
708 if (copy_to_user(bulkreq.lastip, &inlast,
710 return -XFS_ERROR(EFAULT);
712 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
713 return -XFS_ERROR(EFAULT);
720 xfs_ioc_fsgeometry_v1(
724 xfs_fsop_geom_t fsgeo;
727 error = xfs_fs_geometry(mp, &fsgeo, 3);
732 * Caller should have passed an argument of type
733 * xfs_fsop_geom_v1_t. This is a proper subset of the
734 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
736 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
737 return -XFS_ERROR(EFAULT);
746 xfs_fsop_geom_t fsgeo;
749 error = xfs_fs_geometry(mp, &fsgeo, 4);
753 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
754 return -XFS_ERROR(EFAULT);
759 * Linux extended inode flags interface.
763 xfs_merge_ioc_xflags(
767 unsigned int xflags = start;
769 if (flags & FS_IMMUTABLE_FL)
770 xflags |= XFS_XFLAG_IMMUTABLE;
772 xflags &= ~XFS_XFLAG_IMMUTABLE;
773 if (flags & FS_APPEND_FL)
774 xflags |= XFS_XFLAG_APPEND;
776 xflags &= ~XFS_XFLAG_APPEND;
777 if (flags & FS_SYNC_FL)
778 xflags |= XFS_XFLAG_SYNC;
780 xflags &= ~XFS_XFLAG_SYNC;
781 if (flags & FS_NOATIME_FL)
782 xflags |= XFS_XFLAG_NOATIME;
784 xflags &= ~XFS_XFLAG_NOATIME;
785 if (flags & FS_NODUMP_FL)
786 xflags |= XFS_XFLAG_NODUMP;
788 xflags &= ~XFS_XFLAG_NODUMP;
797 unsigned int flags = 0;
799 if (di_flags & XFS_DIFLAG_IMMUTABLE)
800 flags |= FS_IMMUTABLE_FL;
801 if (di_flags & XFS_DIFLAG_APPEND)
802 flags |= FS_APPEND_FL;
803 if (di_flags & XFS_DIFLAG_SYNC)
805 if (di_flags & XFS_DIFLAG_NOATIME)
806 flags |= FS_NOATIME_FL;
807 if (di_flags & XFS_DIFLAG_NODUMP)
808 flags |= FS_NODUMP_FL;
820 memset(&fa, 0, sizeof(struct fsxattr));
822 xfs_ilock(ip, XFS_ILOCK_SHARED);
823 fa.fsx_xflags = xfs_ip2xflags(ip);
824 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
825 fa.fsx_projid = xfs_get_projid(ip);
829 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
830 fa.fsx_nextents = ip->i_afp->if_bytes /
831 sizeof(xfs_bmbt_rec_t);
833 fa.fsx_nextents = ip->i_d.di_anextents;
837 if (ip->i_df.if_flags & XFS_IFEXTENTS)
838 fa.fsx_nextents = ip->i_df.if_bytes /
839 sizeof(xfs_bmbt_rec_t);
841 fa.fsx_nextents = ip->i_d.di_nextents;
843 xfs_iunlock(ip, XFS_ILOCK_SHARED);
845 if (copy_to_user(arg, &fa, sizeof(fa)))
852 struct xfs_inode *ip,
855 unsigned int di_flags;
857 /* can't set PREALLOC this way, just preserve it */
858 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
859 if (xflags & XFS_XFLAG_IMMUTABLE)
860 di_flags |= XFS_DIFLAG_IMMUTABLE;
861 if (xflags & XFS_XFLAG_APPEND)
862 di_flags |= XFS_DIFLAG_APPEND;
863 if (xflags & XFS_XFLAG_SYNC)
864 di_flags |= XFS_DIFLAG_SYNC;
865 if (xflags & XFS_XFLAG_NOATIME)
866 di_flags |= XFS_DIFLAG_NOATIME;
867 if (xflags & XFS_XFLAG_NODUMP)
868 di_flags |= XFS_DIFLAG_NODUMP;
869 if (xflags & XFS_XFLAG_PROJINHERIT)
870 di_flags |= XFS_DIFLAG_PROJINHERIT;
871 if (xflags & XFS_XFLAG_NODEFRAG)
872 di_flags |= XFS_DIFLAG_NODEFRAG;
873 if (xflags & XFS_XFLAG_FILESTREAM)
874 di_flags |= XFS_DIFLAG_FILESTREAM;
875 if (S_ISDIR(ip->i_d.di_mode)) {
876 if (xflags & XFS_XFLAG_RTINHERIT)
877 di_flags |= XFS_DIFLAG_RTINHERIT;
878 if (xflags & XFS_XFLAG_NOSYMLINKS)
879 di_flags |= XFS_DIFLAG_NOSYMLINKS;
880 if (xflags & XFS_XFLAG_EXTSZINHERIT)
881 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
882 } else if (S_ISREG(ip->i_d.di_mode)) {
883 if (xflags & XFS_XFLAG_REALTIME)
884 di_flags |= XFS_DIFLAG_REALTIME;
885 if (xflags & XFS_XFLAG_EXTSIZE)
886 di_flags |= XFS_DIFLAG_EXTSIZE;
889 ip->i_d.di_flags = di_flags;
893 xfs_diflags_to_linux(
894 struct xfs_inode *ip)
896 struct inode *inode = VFS_I(ip);
897 unsigned int xflags = xfs_ip2xflags(ip);
899 if (xflags & XFS_XFLAG_IMMUTABLE)
900 inode->i_flags |= S_IMMUTABLE;
902 inode->i_flags &= ~S_IMMUTABLE;
903 if (xflags & XFS_XFLAG_APPEND)
904 inode->i_flags |= S_APPEND;
906 inode->i_flags &= ~S_APPEND;
907 if (xflags & XFS_XFLAG_SYNC)
908 inode->i_flags |= S_SYNC;
910 inode->i_flags &= ~S_SYNC;
911 if (xflags & XFS_XFLAG_NOATIME)
912 inode->i_flags |= S_NOATIME;
914 inode->i_flags &= ~S_NOATIME;
918 #define FSX_EXTSIZE 2
920 #define FSX_NONBLOCK 8
928 struct xfs_mount *mp = ip->i_mount;
929 struct xfs_trans *tp;
930 unsigned int lock_flags = 0;
931 struct xfs_dquot *udqp = NULL;
932 struct xfs_dquot *gdqp = NULL;
933 struct xfs_dquot *olddquot = NULL;
936 trace_xfs_ioctl_setattr(ip);
938 if (mp->m_flags & XFS_MOUNT_RDONLY)
939 return XFS_ERROR(EROFS);
940 if (XFS_FORCED_SHUTDOWN(mp))
941 return XFS_ERROR(EIO);
944 * Disallow 32bit project ids when projid32bit feature is not enabled.
946 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
947 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
948 return XFS_ERROR(EINVAL);
951 * If disk quotas is on, we make sure that the dquots do exist on disk,
952 * before we start any other transactions. Trying to do this later
953 * is messy. We don't care to take a readlock to look at the ids
954 * in inode here, because we can't hold it across the trans_reserve.
955 * If the IDs do change before we take the ilock, we're covered
956 * because the i_*dquot fields will get updated anyway.
958 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
959 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
960 ip->i_d.di_gid, fa->fsx_projid,
961 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
967 * For the other attributes, we acquire the inode lock and
968 * first do an error checking pass.
970 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
971 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
975 lock_flags = XFS_ILOCK_EXCL;
976 xfs_ilock(ip, lock_flags);
979 * CAP_FOWNER overrides the following restrictions:
981 * The user ID of the calling process must be equal
982 * to the file owner ID, except in cases where the
983 * CAP_FSETID capability is applicable.
985 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
986 code = XFS_ERROR(EPERM);
991 * Do a quota reservation only if projid is actually going to change.
993 if (mask & FSX_PROJID) {
994 if (XFS_IS_QUOTA_RUNNING(mp) &&
995 XFS_IS_PQUOTA_ON(mp) &&
996 xfs_get_projid(ip) != fa->fsx_projid) {
998 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
999 capable(CAP_FOWNER) ?
1000 XFS_QMOPT_FORCE_RES : 0);
1001 if (code) /* out of quota */
1006 if (mask & FSX_EXTSIZE) {
1008 * Can't change extent size if any extents are allocated.
1010 if (ip->i_d.di_nextents &&
1011 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
1013 code = XFS_ERROR(EINVAL); /* EFBIG? */
1018 * Extent size must be a multiple of the appropriate block
1019 * size, if set at all. It must also be smaller than the
1020 * maximum extent size supported by the filesystem.
1022 * Also, for non-realtime files, limit the extent size hint to
1023 * half the size of the AGs in the filesystem so alignment
1024 * doesn't result in extents larger than an AG.
1026 if (fa->fsx_extsize != 0) {
1028 xfs_fsblock_t extsize_fsb;
1030 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1031 if (extsize_fsb > MAXEXTLEN) {
1032 code = XFS_ERROR(EINVAL);
1036 if (XFS_IS_REALTIME_INODE(ip) ||
1037 ((mask & FSX_XFLAGS) &&
1038 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1039 size = mp->m_sb.sb_rextsize <<
1040 mp->m_sb.sb_blocklog;
1042 size = mp->m_sb.sb_blocksize;
1043 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1044 code = XFS_ERROR(EINVAL);
1049 if (fa->fsx_extsize % size) {
1050 code = XFS_ERROR(EINVAL);
1057 if (mask & FSX_XFLAGS) {
1059 * Can't change realtime flag if any extents are allocated.
1061 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1062 (XFS_IS_REALTIME_INODE(ip)) !=
1063 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1064 code = XFS_ERROR(EINVAL); /* EFBIG? */
1069 * If realtime flag is set then must have realtime data.
1071 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1072 if ((mp->m_sb.sb_rblocks == 0) ||
1073 (mp->m_sb.sb_rextsize == 0) ||
1074 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1075 code = XFS_ERROR(EINVAL);
1081 * Can't modify an immutable/append-only file unless
1082 * we have appropriate permission.
1084 if ((ip->i_d.di_flags &
1085 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1087 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1088 !capable(CAP_LINUX_IMMUTABLE)) {
1089 code = XFS_ERROR(EPERM);
1094 xfs_trans_ijoin(tp, ip, 0);
1097 * Change file ownership. Must be the owner or privileged.
1099 if (mask & FSX_PROJID) {
1101 * CAP_FSETID overrides the following restrictions:
1103 * The set-user-ID and set-group-ID bits of a file will be
1104 * cleared upon successful return from chown()
1106 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1107 !capable(CAP_FSETID))
1108 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1111 * Change the ownerships and register quota modifications
1112 * in the transaction.
1114 if (xfs_get_projid(ip) != fa->fsx_projid) {
1115 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1116 olddquot = xfs_qm_vop_chown(tp, ip,
1117 &ip->i_gdquot, gdqp);
1119 xfs_set_projid(ip, fa->fsx_projid);
1122 * We may have to rev the inode as well as
1123 * the superblock version number since projids didn't
1124 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1126 if (ip->i_d.di_version == 1)
1127 xfs_bump_ino_vers2(tp, ip);
1132 if (mask & FSX_EXTSIZE)
1133 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1134 if (mask & FSX_XFLAGS) {
1135 xfs_set_diflags(ip, fa->fsx_xflags);
1136 xfs_diflags_to_linux(ip);
1139 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1140 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1142 XFS_STATS_INC(xs_ig_attrchg);
1145 * If this is a synchronous mount, make sure that the
1146 * transaction goes to disk before returning to the user.
1147 * This is slightly sub-optimal in that truncates require
1148 * two sync transactions instead of one for wsync filesystems.
1149 * One for the truncate and one for the timestamps since we
1150 * don't want to change the timestamps unless we're sure the
1151 * truncate worked. Truncates are less than 1% of the laddis
1152 * mix so this probably isn't worth the trouble to optimize.
1154 if (mp->m_flags & XFS_MOUNT_WSYNC)
1155 xfs_trans_set_sync(tp);
1156 code = xfs_trans_commit(tp, 0);
1157 xfs_iunlock(ip, lock_flags);
1160 * Release any dquot(s) the inode had kept before chown.
1162 xfs_qm_dqrele(olddquot);
1163 xfs_qm_dqrele(udqp);
1164 xfs_qm_dqrele(gdqp);
1169 xfs_qm_dqrele(udqp);
1170 xfs_qm_dqrele(gdqp);
1171 xfs_trans_cancel(tp, 0);
1173 xfs_iunlock(ip, lock_flags);
1187 if (copy_from_user(&fa, arg, sizeof(fa)))
1190 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1191 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1192 mask |= FSX_NONBLOCK;
1194 error = mnt_want_write_file(filp);
1197 error = xfs_ioctl_setattr(ip, &fa, mask);
1198 mnt_drop_write_file(filp);
1209 flags = xfs_di2lxflags(ip->i_d.di_flags);
1210 if (copy_to_user(arg, &flags, sizeof(flags)))
1226 if (copy_from_user(&flags, arg, sizeof(flags)))
1229 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1230 FS_NOATIME_FL | FS_NODUMP_FL | \
1235 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1236 mask |= FSX_NONBLOCK;
1237 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1239 error = mnt_want_write_file(filp);
1242 error = xfs_ioctl_setattr(ip, &fa, mask);
1243 mnt_drop_write_file(filp);
1248 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1250 struct getbmap __user *base = *ap;
1252 /* copy only getbmap portion (not getbmapx) */
1253 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1254 return XFS_ERROR(EFAULT);
1256 *ap += sizeof(struct getbmap);
1262 struct xfs_inode *ip,
1267 struct getbmapx bmx;
1270 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1271 return -XFS_ERROR(EFAULT);
1273 if (bmx.bmv_count < 2)
1274 return -XFS_ERROR(EINVAL);
1276 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1277 if (ioflags & IO_INVIS)
1278 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1280 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1281 (struct getbmap *)arg+1);
1285 /* copy back header - only size of getbmap */
1286 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1287 return -XFS_ERROR(EFAULT);
1292 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1294 struct getbmapx __user *base = *ap;
1296 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1297 return XFS_ERROR(EFAULT);
1299 *ap += sizeof(struct getbmapx);
1305 struct xfs_inode *ip,
1308 struct getbmapx bmx;
1311 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1312 return -XFS_ERROR(EFAULT);
1314 if (bmx.bmv_count < 2)
1315 return -XFS_ERROR(EINVAL);
1317 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1318 return -XFS_ERROR(EINVAL);
1320 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1321 (struct getbmapx *)arg+1);
1325 /* copy back header */
1326 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1327 return -XFS_ERROR(EFAULT);
1333 * Note: some of the ioctl's return positive numbers as a
1334 * byte count indicating success, such as readlink_by_handle.
1335 * So we don't "sign flip" like most other routines. This means
1336 * true errors need to be returned as a negative value.
1344 struct inode *inode = file_inode(filp);
1345 struct xfs_inode *ip = XFS_I(inode);
1346 struct xfs_mount *mp = ip->i_mount;
1347 void __user *arg = (void __user *)p;
1351 if (filp->f_mode & FMODE_NOCMTIME)
1352 ioflags |= IO_INVIS;
1354 trace_xfs_file_ioctl(ip);
1358 return xfs_ioc_trim(mp, arg);
1359 case XFS_IOC_ALLOCSP:
1360 case XFS_IOC_FREESP:
1361 case XFS_IOC_RESVSP:
1362 case XFS_IOC_UNRESVSP:
1363 case XFS_IOC_ALLOCSP64:
1364 case XFS_IOC_FREESP64:
1365 case XFS_IOC_RESVSP64:
1366 case XFS_IOC_UNRESVSP64:
1367 case XFS_IOC_ZERO_RANGE: {
1370 if (copy_from_user(&bf, arg, sizeof(bf)))
1371 return -XFS_ERROR(EFAULT);
1372 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1374 case XFS_IOC_DIOINFO: {
1376 xfs_buftarg_t *target =
1377 XFS_IS_REALTIME_INODE(ip) ?
1378 mp->m_rtdev_targp : mp->m_ddev_targp;
1380 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1381 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1383 if (copy_to_user(arg, &da, sizeof(da)))
1384 return -XFS_ERROR(EFAULT);
1388 case XFS_IOC_FSBULKSTAT_SINGLE:
1389 case XFS_IOC_FSBULKSTAT:
1390 case XFS_IOC_FSINUMBERS:
1391 return xfs_ioc_bulkstat(mp, cmd, arg);
1393 case XFS_IOC_FSGEOMETRY_V1:
1394 return xfs_ioc_fsgeometry_v1(mp, arg);
1396 case XFS_IOC_FSGEOMETRY:
1397 return xfs_ioc_fsgeometry(mp, arg);
1399 case XFS_IOC_GETVERSION:
1400 return put_user(inode->i_generation, (int __user *)arg);
1402 case XFS_IOC_FSGETXATTR:
1403 return xfs_ioc_fsgetxattr(ip, 0, arg);
1404 case XFS_IOC_FSGETXATTRA:
1405 return xfs_ioc_fsgetxattr(ip, 1, arg);
1406 case XFS_IOC_FSSETXATTR:
1407 return xfs_ioc_fssetxattr(ip, filp, arg);
1408 case XFS_IOC_GETXFLAGS:
1409 return xfs_ioc_getxflags(ip, arg);
1410 case XFS_IOC_SETXFLAGS:
1411 return xfs_ioc_setxflags(ip, filp, arg);
1413 case XFS_IOC_FSSETDM: {
1414 struct fsdmidata dmi;
1416 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1417 return -XFS_ERROR(EFAULT);
1419 error = mnt_want_write_file(filp);
1423 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1425 mnt_drop_write_file(filp);
1429 case XFS_IOC_GETBMAP:
1430 case XFS_IOC_GETBMAPA:
1431 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1433 case XFS_IOC_GETBMAPX:
1434 return xfs_ioc_getbmapx(ip, arg);
1436 case XFS_IOC_FD_TO_HANDLE:
1437 case XFS_IOC_PATH_TO_HANDLE:
1438 case XFS_IOC_PATH_TO_FSHANDLE: {
1439 xfs_fsop_handlereq_t hreq;
1441 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1442 return -XFS_ERROR(EFAULT);
1443 return xfs_find_handle(cmd, &hreq);
1445 case XFS_IOC_OPEN_BY_HANDLE: {
1446 xfs_fsop_handlereq_t hreq;
1448 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1449 return -XFS_ERROR(EFAULT);
1450 return xfs_open_by_handle(filp, &hreq);
1452 case XFS_IOC_FSSETDM_BY_HANDLE:
1453 return xfs_fssetdm_by_handle(filp, arg);
1455 case XFS_IOC_READLINK_BY_HANDLE: {
1456 xfs_fsop_handlereq_t hreq;
1458 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1459 return -XFS_ERROR(EFAULT);
1460 return xfs_readlink_by_handle(filp, &hreq);
1462 case XFS_IOC_ATTRLIST_BY_HANDLE:
1463 return xfs_attrlist_by_handle(filp, arg);
1465 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1466 return xfs_attrmulti_by_handle(filp, arg);
1468 case XFS_IOC_SWAPEXT: {
1469 struct xfs_swapext sxp;
1471 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1472 return -XFS_ERROR(EFAULT);
1473 error = mnt_want_write_file(filp);
1476 error = xfs_swapext(&sxp);
1477 mnt_drop_write_file(filp);
1481 case XFS_IOC_FSCOUNTS: {
1482 xfs_fsop_counts_t out;
1484 error = xfs_fs_counts(mp, &out);
1488 if (copy_to_user(arg, &out, sizeof(out)))
1489 return -XFS_ERROR(EFAULT);
1493 case XFS_IOC_SET_RESBLKS: {
1494 xfs_fsop_resblks_t inout;
1497 if (!capable(CAP_SYS_ADMIN))
1500 if (mp->m_flags & XFS_MOUNT_RDONLY)
1501 return -XFS_ERROR(EROFS);
1503 if (copy_from_user(&inout, arg, sizeof(inout)))
1504 return -XFS_ERROR(EFAULT);
1506 error = mnt_want_write_file(filp);
1510 /* input parameter is passed in resblks field of structure */
1512 error = xfs_reserve_blocks(mp, &in, &inout);
1513 mnt_drop_write_file(filp);
1517 if (copy_to_user(arg, &inout, sizeof(inout)))
1518 return -XFS_ERROR(EFAULT);
1522 case XFS_IOC_GET_RESBLKS: {
1523 xfs_fsop_resblks_t out;
1525 if (!capable(CAP_SYS_ADMIN))
1528 error = xfs_reserve_blocks(mp, NULL, &out);
1532 if (copy_to_user(arg, &out, sizeof(out)))
1533 return -XFS_ERROR(EFAULT);
1538 case XFS_IOC_FSGROWFSDATA: {
1539 xfs_growfs_data_t in;
1541 if (copy_from_user(&in, arg, sizeof(in)))
1542 return -XFS_ERROR(EFAULT);
1544 error = mnt_want_write_file(filp);
1547 error = xfs_growfs_data(mp, &in);
1548 mnt_drop_write_file(filp);
1552 case XFS_IOC_FSGROWFSLOG: {
1553 xfs_growfs_log_t in;
1555 if (copy_from_user(&in, arg, sizeof(in)))
1556 return -XFS_ERROR(EFAULT);
1558 error = mnt_want_write_file(filp);
1561 error = xfs_growfs_log(mp, &in);
1562 mnt_drop_write_file(filp);
1566 case XFS_IOC_FSGROWFSRT: {
1569 if (copy_from_user(&in, arg, sizeof(in)))
1570 return -XFS_ERROR(EFAULT);
1572 error = mnt_want_write_file(filp);
1575 error = xfs_growfs_rt(mp, &in);
1576 mnt_drop_write_file(filp);
1580 case XFS_IOC_GOINGDOWN: {
1583 if (!capable(CAP_SYS_ADMIN))
1586 if (get_user(in, (__uint32_t __user *)arg))
1587 return -XFS_ERROR(EFAULT);
1589 error = xfs_fs_goingdown(mp, in);
1593 case XFS_IOC_ERROR_INJECTION: {
1594 xfs_error_injection_t in;
1596 if (!capable(CAP_SYS_ADMIN))
1599 if (copy_from_user(&in, arg, sizeof(in)))
1600 return -XFS_ERROR(EFAULT);
1602 error = xfs_errortag_add(in.errtag, mp);
1606 case XFS_IOC_ERROR_CLEARALL:
1607 if (!capable(CAP_SYS_ADMIN))
1610 error = xfs_errortag_clearall(mp, 1);
1613 case XFS_IOC_FREE_EOFBLOCKS: {
1614 struct xfs_eofblocks eofb;
1616 if (!capable(CAP_SYS_ADMIN))
1619 if (mp->m_flags & XFS_MOUNT_RDONLY)
1620 return -XFS_ERROR(EROFS);
1622 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1623 return -XFS_ERROR(EFAULT);
1625 if (eofb.eof_version != XFS_EOFBLOCKS_VERSION)
1626 return -XFS_ERROR(EINVAL);
1628 if (eofb.eof_flags & ~XFS_EOF_FLAGS_VALID)
1629 return -XFS_ERROR(EINVAL);
1631 if (memchr_inv(&eofb.pad32, 0, sizeof(eofb.pad32)) ||
1632 memchr_inv(eofb.pad64, 0, sizeof(eofb.pad64)))
1633 return -XFS_ERROR(EINVAL);
1635 error = xfs_icache_free_eofblocks(mp, &eofb);