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_btree.h"
38 #include "xfs_ialloc.h"
39 #include "xfs_rtalloc.h"
40 #include "xfs_itable.h"
41 #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"
54 #include <linux/capability.h>
55 #include <linux/dcache.h>
56 #include <linux/mount.h>
57 #include <linux/namei.h>
58 #include <linux/pagemap.h>
61 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
62 * a file or fs handle.
64 * XFS_IOC_PATH_TO_FSHANDLE
65 * returns fs handle for a mount point or path within that mount point
66 * XFS_IOC_FD_TO_HANDLE
67 * returns full handle for a FD opened in user space
68 * XFS_IOC_PATH_TO_HANDLE
69 * returns full handle for a path
78 xfs_fsop_handlereq_t hreq;
81 if (copy_from_user(&hreq, arg, sizeof(hreq)))
82 return -XFS_ERROR(EFAULT);
84 memset((char *)&handle, 0, sizeof(handle));
87 case XFS_IOC_PATH_TO_FSHANDLE:
88 case XFS_IOC_PATH_TO_HANDLE: {
90 int error = user_lpath((const char __user *)hreq.path, &path);
95 ASSERT(path.dentry->d_inode);
96 inode = igrab(path.dentry->d_inode);
101 case XFS_IOC_FD_TO_HANDLE: {
104 file = fget(hreq.fd);
108 ASSERT(file->f_path.dentry);
109 ASSERT(file->f_path.dentry->d_inode);
110 inode = igrab(file->f_path.dentry->d_inode);
117 return -XFS_ERROR(EINVAL);
120 if (inode->i_sb->s_magic != XFS_SB_MAGIC) {
121 /* we're not in XFS anymore, Toto */
123 return -XFS_ERROR(EINVAL);
126 switch (inode->i_mode & S_IFMT) {
133 return -XFS_ERROR(EBADF);
136 /* now we can grab the fsid */
137 memcpy(&handle.ha_fsid, XFS_I(inode)->i_mount->m_fixedfsid,
139 hsize = sizeof(xfs_fsid_t);
141 if (cmd != XFS_IOC_PATH_TO_FSHANDLE) {
142 xfs_inode_t *ip = XFS_I(inode);
145 /* need to get access to the xfs_inode to read the generation */
146 lock_mode = xfs_ilock_map_shared(ip);
148 /* fill in fid section of handle from inode */
149 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
150 sizeof(handle.ha_fid.fid_len);
151 handle.ha_fid.fid_pad = 0;
152 handle.ha_fid.fid_gen = ip->i_d.di_gen;
153 handle.ha_fid.fid_ino = ip->i_ino;
155 xfs_iunlock_map_shared(ip, lock_mode);
157 hsize = XFS_HSIZE(handle);
160 /* now copy our handle into the user buffer & write out the size */
161 if (copy_to_user(hreq.ohandle, &handle, hsize) ||
162 copy_to_user(hreq.ohandlen, &hsize, sizeof(__s32))) {
164 return -XFS_ERROR(EFAULT);
173 * Convert userspace handle data into inode.
175 * We use the fact that all the fsop_handlereq ioctl calls have a data
176 * structure argument whose first component is always a xfs_fsop_handlereq_t,
177 * so we can pass that sub structure into this handy, shared routine.
179 * If no error, caller must always iput the returned inode.
182 xfs_vget_fsop_handlereq(
184 struct inode *parinode, /* parent inode pointer */
185 xfs_fsop_handlereq_t *hreq,
186 struct inode **inode)
191 xfs_handle_t *handlep;
199 * Only allow handle opens under a directory.
201 if (!S_ISDIR(parinode->i_mode))
202 return XFS_ERROR(ENOTDIR);
204 hanp = hreq->ihandle;
205 hlen = hreq->ihandlen;
208 if (hlen < sizeof(handlep->ha_fsid) || hlen > sizeof(*handlep))
209 return XFS_ERROR(EINVAL);
210 if (copy_from_user(handlep, hanp, hlen))
211 return XFS_ERROR(EFAULT);
212 if (hlen < sizeof(*handlep))
213 memset(((char *)handlep) + hlen, 0, sizeof(*handlep) - hlen);
214 if (hlen > sizeof(handlep->ha_fsid)) {
215 if (handlep->ha_fid.fid_len !=
216 (hlen - sizeof(handlep->ha_fsid) -
217 sizeof(handlep->ha_fid.fid_len)) ||
218 handlep->ha_fid.fid_pad)
219 return XFS_ERROR(EINVAL);
223 * Crack the handle, obtain the inode # & generation #
225 xfid = (struct xfs_fid *)&handlep->ha_fid;
226 if (xfid->fid_len == sizeof(*xfid) - sizeof(xfid->fid_len)) {
228 igen = xfid->fid_gen;
230 return XFS_ERROR(EINVAL);
234 * Get the XFS inode, building a Linux inode to go with it.
236 error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0);
240 return XFS_ERROR(EIO);
241 if (ip->i_d.di_gen != igen) {
242 xfs_iput_new(ip, XFS_ILOCK_SHARED);
243 return XFS_ERROR(ENOENT);
246 xfs_iunlock(ip, XFS_ILOCK_SHARED);
256 struct file *parfilp,
257 struct inode *parinode)
264 struct dentry *dentry;
265 xfs_fsop_handlereq_t hreq;
267 if (!capable(CAP_SYS_ADMIN))
268 return -XFS_ERROR(EPERM);
269 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
270 return -XFS_ERROR(EFAULT);
272 error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &inode);
276 /* Restrict xfs_open_by_handle to directories & regular files. */
277 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
279 return -XFS_ERROR(EINVAL);
282 #if BITS_PER_LONG != 32
283 hreq.oflags |= O_LARGEFILE;
285 /* Put open permission in namei format. */
286 permflag = hreq.oflags;
287 if ((permflag+1) & O_ACCMODE)
289 if (permflag & O_TRUNC)
292 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
293 (permflag & FMODE_WRITE) && IS_APPEND(inode)) {
295 return -XFS_ERROR(EPERM);
298 if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
300 return -XFS_ERROR(EACCES);
303 /* Can't write directories. */
304 if ( S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) {
306 return -XFS_ERROR(EISDIR);
309 if ((new_fd = get_unused_fd()) < 0) {
314 dentry = d_alloc_anon(inode);
315 if (dentry == NULL) {
317 put_unused_fd(new_fd);
318 return -XFS_ERROR(ENOMEM);
321 /* Ensure umount returns EBUSY on umounts while this file is open. */
322 mntget(parfilp->f_path.mnt);
324 /* Create file pointer. */
325 filp = dentry_open(dentry, parfilp->f_path.mnt, hreq.oflags);
327 put_unused_fd(new_fd);
328 return -XFS_ERROR(-PTR_ERR(filp));
330 if (inode->i_mode & S_IFREG) {
331 /* invisible operation should not change atime */
332 filp->f_flags |= O_NOATIME;
333 filp->f_op = &xfs_invis_file_operations;
336 fd_install(new_fd, filp);
341 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
342 * unused first argument.
357 if (len > (unsigned) buflen)
359 if (copy_to_user(buffer, link, len))
367 xfs_readlink_by_handle(
370 struct inode *parinode)
373 xfs_fsop_handlereq_t hreq;
378 if (!capable(CAP_SYS_ADMIN))
379 return -XFS_ERROR(EPERM);
380 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
381 return -XFS_ERROR(EFAULT);
383 error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &inode);
387 /* Restrict this handle operation to symlinks only. */
388 if (!S_ISLNK(inode->i_mode)) {
389 error = -XFS_ERROR(EINVAL);
393 if (copy_from_user(&olen, hreq.ohandlen, sizeof(__u32))) {
394 error = -XFS_ERROR(EFAULT);
398 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
402 error = -xfs_readlink(XFS_I(inode), link);
405 error = do_readlink(hreq.ohandle, olen, link);
417 xfs_fssetdm_by_handle(
420 struct inode *parinode)
423 struct fsdmidata fsd;
424 xfs_fsop_setdm_handlereq_t dmhreq;
427 if (!capable(CAP_MKNOD))
428 return -XFS_ERROR(EPERM);
429 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
430 return -XFS_ERROR(EFAULT);
432 error = xfs_vget_fsop_handlereq(mp, parinode, &dmhreq.hreq, &inode);
436 if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) {
437 error = -XFS_ERROR(EPERM);
441 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
442 error = -XFS_ERROR(EFAULT);
446 error = -xfs_set_dmattrs(XFS_I(inode), fsd.fsd_dmevmask,
455 xfs_attrlist_by_handle(
458 struct inode *parinode)
461 attrlist_cursor_kern_t *cursor;
462 xfs_fsop_attrlist_handlereq_t al_hreq;
466 if (!capable(CAP_SYS_ADMIN))
467 return -XFS_ERROR(EPERM);
468 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
469 return -XFS_ERROR(EFAULT);
470 if (al_hreq.buflen > XATTR_LIST_MAX)
471 return -XFS_ERROR(EINVAL);
474 * Reject flags, only allow namespaces.
476 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
477 return -XFS_ERROR(EINVAL);
479 error = xfs_vget_fsop_handlereq(mp, parinode, &al_hreq.hreq, &inode);
483 kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL);
487 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
488 error = xfs_attr_list(XFS_I(inode), kbuf, al_hreq.buflen,
489 al_hreq.flags, cursor);
493 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
505 xfs_attrmulti_attr_get(
515 if (*len > XATTR_SIZE_MAX)
517 kbuf = kmalloc(*len, GFP_KERNEL);
521 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
525 if (copy_to_user(ubuf, kbuf, *len))
534 xfs_attrmulti_attr_set(
537 const char __user *ubuf,
544 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
546 if (len > XATTR_SIZE_MAX)
549 kbuf = kmalloc(len, GFP_KERNEL);
553 if (copy_from_user(kbuf, ubuf, len))
556 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
564 xfs_attrmulti_attr_remove(
569 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
571 return xfs_attr_remove(XFS_I(inode), name, flags);
575 xfs_attrmulti_by_handle(
578 struct file *parfilp,
579 struct inode *parinode)
582 xfs_attr_multiop_t *ops;
583 xfs_fsop_attrmulti_handlereq_t am_hreq;
585 unsigned int i, size;
588 if (!capable(CAP_SYS_ADMIN))
589 return -XFS_ERROR(EPERM);
590 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
591 return -XFS_ERROR(EFAULT);
593 error = xfs_vget_fsop_handlereq(mp, parinode, &am_hreq.hreq, &inode);
598 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
599 if (!size || size > 16 * PAGE_SIZE)
603 ops = kmalloc(size, GFP_KERNEL);
608 if (copy_from_user(ops, am_hreq.ops, size))
611 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
617 for (i = 0; i < am_hreq.opcount; i++) {
618 ops[i].am_error = strncpy_from_user(attr_name,
619 ops[i].am_attrname, MAXNAMELEN);
620 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
622 if (ops[i].am_error < 0)
625 switch (ops[i].am_opcode) {
627 ops[i].am_error = xfs_attrmulti_attr_get(inode,
628 attr_name, ops[i].am_attrvalue,
629 &ops[i].am_length, ops[i].am_flags);
632 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
635 ops[i].am_error = xfs_attrmulti_attr_set(inode,
636 attr_name, ops[i].am_attrvalue,
637 ops[i].am_length, ops[i].am_flags);
638 mnt_drop_write(parfilp->f_path.mnt);
641 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
644 ops[i].am_error = xfs_attrmulti_attr_remove(inode,
645 attr_name, ops[i].am_flags);
646 mnt_drop_write(parfilp->f_path.mnt);
649 ops[i].am_error = EINVAL;
653 if (copy_to_user(am_hreq.ops, ops, size))
654 error = XFS_ERROR(EFAULT);
667 struct xfs_inode *ip,
678 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
679 return -XFS_ERROR(EPERM);
681 if (!(filp->f_mode & FMODE_WRITE))
682 return -XFS_ERROR(EBADF);
684 if (!S_ISREG(inode->i_mode))
685 return -XFS_ERROR(EINVAL);
687 if (copy_from_user(&bf, arg, sizeof(bf)))
688 return -XFS_ERROR(EFAULT);
690 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
691 attr_flags |= XFS_ATTR_NONBLOCK;
692 if (ioflags & IO_INVIS)
693 attr_flags |= XFS_ATTR_DMI;
695 error = xfs_change_file_space(ip, cmd, &bf, filp->f_pos,
706 xfs_fsop_bulkreq_t bulkreq;
707 int count; /* # of records returned */
708 xfs_ino_t inlast; /* last inode number */
712 /* done = 1 if there are more stats to get and if bulkstat */
713 /* should be called again (unused here, but used in dmapi) */
715 if (!capable(CAP_SYS_ADMIN))
718 if (XFS_FORCED_SHUTDOWN(mp))
719 return -XFS_ERROR(EIO);
721 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
722 return -XFS_ERROR(EFAULT);
724 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
725 return -XFS_ERROR(EFAULT);
727 if ((count = bulkreq.icount) <= 0)
728 return -XFS_ERROR(EINVAL);
730 if (bulkreq.ubuffer == NULL)
731 return -XFS_ERROR(EINVAL);
733 if (cmd == XFS_IOC_FSINUMBERS)
734 error = xfs_inumbers(mp, &inlast, &count,
735 bulkreq.ubuffer, xfs_inumbers_fmt);
736 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
737 error = xfs_bulkstat_single(mp, &inlast,
738 bulkreq.ubuffer, &done);
739 else /* XFS_IOC_FSBULKSTAT */
740 error = xfs_bulkstat(mp, &inlast, &count,
741 (bulkstat_one_pf)xfs_bulkstat_one, NULL,
742 sizeof(xfs_bstat_t), bulkreq.ubuffer,
743 BULKSTAT_FG_QUICK, &done);
748 if (bulkreq.ocount != NULL) {
749 if (copy_to_user(bulkreq.lastip, &inlast,
751 return -XFS_ERROR(EFAULT);
753 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
754 return -XFS_ERROR(EFAULT);
761 xfs_ioc_fsgeometry_v1(
765 xfs_fsop_geom_v1_t fsgeo;
768 error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3);
772 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
773 return -XFS_ERROR(EFAULT);
782 xfs_fsop_geom_t fsgeo;
785 error = xfs_fs_geometry(mp, &fsgeo, 4);
789 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
790 return -XFS_ERROR(EFAULT);
795 * Linux extended inode flags interface.
799 xfs_merge_ioc_xflags(
803 unsigned int xflags = start;
805 if (flags & FS_IMMUTABLE_FL)
806 xflags |= XFS_XFLAG_IMMUTABLE;
808 xflags &= ~XFS_XFLAG_IMMUTABLE;
809 if (flags & FS_APPEND_FL)
810 xflags |= XFS_XFLAG_APPEND;
812 xflags &= ~XFS_XFLAG_APPEND;
813 if (flags & FS_SYNC_FL)
814 xflags |= XFS_XFLAG_SYNC;
816 xflags &= ~XFS_XFLAG_SYNC;
817 if (flags & FS_NOATIME_FL)
818 xflags |= XFS_XFLAG_NOATIME;
820 xflags &= ~XFS_XFLAG_NOATIME;
821 if (flags & FS_NODUMP_FL)
822 xflags |= XFS_XFLAG_NODUMP;
824 xflags &= ~XFS_XFLAG_NODUMP;
833 unsigned int flags = 0;
835 if (di_flags & XFS_DIFLAG_IMMUTABLE)
836 flags |= FS_IMMUTABLE_FL;
837 if (di_flags & XFS_DIFLAG_APPEND)
838 flags |= FS_APPEND_FL;
839 if (di_flags & XFS_DIFLAG_SYNC)
841 if (di_flags & XFS_DIFLAG_NOATIME)
842 flags |= FS_NOATIME_FL;
843 if (di_flags & XFS_DIFLAG_NODUMP)
844 flags |= FS_NODUMP_FL;
856 xfs_ilock(ip, XFS_ILOCK_SHARED);
857 fa.fsx_xflags = xfs_ip2xflags(ip);
858 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
859 fa.fsx_projid = ip->i_d.di_projid;
863 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
864 fa.fsx_nextents = ip->i_afp->if_bytes /
865 sizeof(xfs_bmbt_rec_t);
867 fa.fsx_nextents = ip->i_d.di_anextents;
871 if (ip->i_df.if_flags & XFS_IFEXTENTS)
872 fa.fsx_nextents = ip->i_df.if_bytes /
873 sizeof(xfs_bmbt_rec_t);
875 fa.fsx_nextents = ip->i_d.di_nextents;
877 xfs_iunlock(ip, XFS_ILOCK_SHARED);
879 if (copy_to_user(arg, &fa, sizeof(fa)))
886 struct xfs_inode *ip,
889 unsigned int di_flags;
891 /* can't set PREALLOC this way, just preserve it */
892 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
893 if (xflags & XFS_XFLAG_IMMUTABLE)
894 di_flags |= XFS_DIFLAG_IMMUTABLE;
895 if (xflags & XFS_XFLAG_APPEND)
896 di_flags |= XFS_DIFLAG_APPEND;
897 if (xflags & XFS_XFLAG_SYNC)
898 di_flags |= XFS_DIFLAG_SYNC;
899 if (xflags & XFS_XFLAG_NOATIME)
900 di_flags |= XFS_DIFLAG_NOATIME;
901 if (xflags & XFS_XFLAG_NODUMP)
902 di_flags |= XFS_DIFLAG_NODUMP;
903 if (xflags & XFS_XFLAG_PROJINHERIT)
904 di_flags |= XFS_DIFLAG_PROJINHERIT;
905 if (xflags & XFS_XFLAG_NODEFRAG)
906 di_flags |= XFS_DIFLAG_NODEFRAG;
907 if (xflags & XFS_XFLAG_FILESTREAM)
908 di_flags |= XFS_DIFLAG_FILESTREAM;
909 if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
910 if (xflags & XFS_XFLAG_RTINHERIT)
911 di_flags |= XFS_DIFLAG_RTINHERIT;
912 if (xflags & XFS_XFLAG_NOSYMLINKS)
913 di_flags |= XFS_DIFLAG_NOSYMLINKS;
914 if (xflags & XFS_XFLAG_EXTSZINHERIT)
915 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
916 } else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) {
917 if (xflags & XFS_XFLAG_REALTIME)
918 di_flags |= XFS_DIFLAG_REALTIME;
919 if (xflags & XFS_XFLAG_EXTSIZE)
920 di_flags |= XFS_DIFLAG_EXTSIZE;
923 ip->i_d.di_flags = di_flags;
927 xfs_diflags_to_linux(
928 struct xfs_inode *ip)
930 struct inode *inode = VFS_I(ip);
931 unsigned int xflags = xfs_ip2xflags(ip);
933 if (xflags & XFS_XFLAG_IMMUTABLE)
934 inode->i_flags |= S_IMMUTABLE;
936 inode->i_flags &= ~S_IMMUTABLE;
937 if (xflags & XFS_XFLAG_APPEND)
938 inode->i_flags |= S_APPEND;
940 inode->i_flags &= ~S_APPEND;
941 if (xflags & XFS_XFLAG_SYNC)
942 inode->i_flags |= S_SYNC;
944 inode->i_flags &= ~S_SYNC;
945 if (xflags & XFS_XFLAG_NOATIME)
946 inode->i_flags |= S_NOATIME;
948 inode->i_flags &= ~S_NOATIME;
952 #define FSX_EXTSIZE 2
954 #define FSX_NONBLOCK 8
962 struct xfs_mount *mp = ip->i_mount;
963 struct xfs_trans *tp;
964 unsigned int lock_flags = 0;
965 struct xfs_dquot *udqp = NULL, *gdqp = NULL;
966 struct xfs_dquot *olddquot = NULL;
969 xfs_itrace_entry(ip);
971 if (mp->m_flags & XFS_MOUNT_RDONLY)
972 return XFS_ERROR(EROFS);
973 if (XFS_FORCED_SHUTDOWN(mp))
974 return XFS_ERROR(EIO);
977 * If disk quotas is on, we make sure that the dquots do exist on disk,
978 * before we start any other transactions. Trying to do this later
979 * is messy. We don't care to take a readlock to look at the ids
980 * in inode here, because we can't hold it across the trans_reserve.
981 * If the IDs do change before we take the ilock, we're covered
982 * because the i_*dquot fields will get updated anyway.
984 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
985 code = XFS_QM_DQVOPALLOC(mp, ip, ip->i_d.di_uid,
986 ip->i_d.di_gid, fa->fsx_projid,
987 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
993 * For the other attributes, we acquire the inode lock and
994 * first do an error checking pass.
996 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
997 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
1001 lock_flags = XFS_ILOCK_EXCL;
1002 xfs_ilock(ip, lock_flags);
1005 * CAP_FOWNER overrides the following restrictions:
1007 * The user ID of the calling process must be equal
1008 * to the file owner ID, except in cases where the
1009 * CAP_FSETID capability is applicable.
1011 if (current->fsuid != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
1012 code = XFS_ERROR(EPERM);
1017 * Do a quota reservation only if projid is actually going to change.
1019 if (mask & FSX_PROJID) {
1020 if (XFS_IS_PQUOTA_ON(mp) &&
1021 ip->i_d.di_projid != fa->fsx_projid) {
1023 code = XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, udqp, gdqp,
1024 capable(CAP_FOWNER) ?
1025 XFS_QMOPT_FORCE_RES : 0);
1026 if (code) /* out of quota */
1031 if (mask & FSX_EXTSIZE) {
1033 * Can't change extent size if any extents are allocated.
1035 if (ip->i_d.di_nextents &&
1036 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
1038 code = XFS_ERROR(EINVAL); /* EFBIG? */
1043 * Extent size must be a multiple of the appropriate block
1044 * size, if set at all.
1046 if (fa->fsx_extsize != 0) {
1049 if (XFS_IS_REALTIME_INODE(ip) ||
1050 ((mask & FSX_XFLAGS) &&
1051 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1052 size = mp->m_sb.sb_rextsize <<
1053 mp->m_sb.sb_blocklog;
1055 size = mp->m_sb.sb_blocksize;
1058 if (fa->fsx_extsize % size) {
1059 code = XFS_ERROR(EINVAL);
1066 if (mask & FSX_XFLAGS) {
1068 * Can't change realtime flag if any extents are allocated.
1070 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1071 (XFS_IS_REALTIME_INODE(ip)) !=
1072 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1073 code = XFS_ERROR(EINVAL); /* EFBIG? */
1078 * If realtime flag is set then must have realtime data.
1080 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1081 if ((mp->m_sb.sb_rblocks == 0) ||
1082 (mp->m_sb.sb_rextsize == 0) ||
1083 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1084 code = XFS_ERROR(EINVAL);
1090 * Can't modify an immutable/append-only file unless
1091 * we have appropriate permission.
1093 if ((ip->i_d.di_flags &
1094 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1096 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1097 !capable(CAP_LINUX_IMMUTABLE)) {
1098 code = XFS_ERROR(EPERM);
1103 xfs_trans_ijoin(tp, ip, lock_flags);
1104 xfs_trans_ihold(tp, ip);
1107 * Change file ownership. Must be the owner or privileged.
1108 * If the system was configured with the "restricted_chown"
1109 * option, the owner is not permitted to give away the file,
1110 * and can change the group id only to a group of which he
1111 * or she is a member.
1113 if (mask & FSX_PROJID) {
1115 * CAP_FSETID overrides the following restrictions:
1117 * The set-user-ID and set-group-ID bits of a file will be
1118 * cleared upon successful return from chown()
1120 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1121 !capable(CAP_FSETID))
1122 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1125 * Change the ownerships and register quota modifications
1126 * in the transaction.
1128 if (ip->i_d.di_projid != fa->fsx_projid) {
1129 if (XFS_IS_PQUOTA_ON(mp)) {
1130 olddquot = XFS_QM_DQVOPCHOWN(mp, tp, ip,
1131 &ip->i_gdquot, gdqp);
1133 ip->i_d.di_projid = fa->fsx_projid;
1136 * We may have to rev the inode as well as
1137 * the superblock version number since projids didn't
1138 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1140 if (ip->i_d.di_version == XFS_DINODE_VERSION_1)
1141 xfs_bump_ino_vers2(tp, ip);
1146 if (mask & FSX_EXTSIZE)
1147 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1148 if (mask & FSX_XFLAGS) {
1149 xfs_set_diflags(ip, fa->fsx_xflags);
1150 xfs_diflags_to_linux(ip);
1153 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1154 xfs_ichgtime(ip, XFS_ICHGTIME_CHG);
1156 XFS_STATS_INC(xs_ig_attrchg);
1159 * If this is a synchronous mount, make sure that the
1160 * transaction goes to disk before returning to the user.
1161 * This is slightly sub-optimal in that truncates require
1162 * two sync transactions instead of one for wsync filesystems.
1163 * One for the truncate and one for the timestamps since we
1164 * don't want to change the timestamps unless we're sure the
1165 * truncate worked. Truncates are less than 1% of the laddis
1166 * mix so this probably isn't worth the trouble to optimize.
1168 if (mp->m_flags & XFS_MOUNT_WSYNC)
1169 xfs_trans_set_sync(tp);
1170 code = xfs_trans_commit(tp, 0);
1171 xfs_iunlock(ip, lock_flags);
1174 * Release any dquot(s) the inode had kept before chown.
1176 XFS_QM_DQRELE(mp, olddquot);
1177 XFS_QM_DQRELE(mp, udqp);
1178 XFS_QM_DQRELE(mp, gdqp);
1183 if (DM_EVENT_ENABLED(ip, DM_EVENT_ATTRIBUTE)) {
1184 XFS_SEND_NAMESP(mp, DM_EVENT_ATTRIBUTE, ip, DM_RIGHT_NULL,
1185 NULL, DM_RIGHT_NULL, NULL, NULL, 0, 0,
1186 (mask & FSX_NONBLOCK) ? DM_FLAGS_NDELAY : 0);
1192 XFS_QM_DQRELE(mp, udqp);
1193 XFS_QM_DQRELE(mp, gdqp);
1194 xfs_trans_cancel(tp, 0);
1196 xfs_iunlock(ip, lock_flags);
1209 if (copy_from_user(&fa, arg, sizeof(fa)))
1212 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1213 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1214 mask |= FSX_NONBLOCK;
1216 return -xfs_ioctl_setattr(ip, &fa, mask);
1226 flags = xfs_di2lxflags(ip->i_d.di_flags);
1227 if (copy_to_user(arg, &flags, sizeof(flags)))
1242 if (copy_from_user(&flags, arg, sizeof(flags)))
1245 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1246 FS_NOATIME_FL | FS_NODUMP_FL | \
1251 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1252 mask |= FSX_NONBLOCK;
1253 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1255 return -xfs_ioctl_setattr(ip, &fa, mask);
1260 struct xfs_inode *ip,
1269 if (copy_from_user(&bm, arg, sizeof(bm)))
1270 return -XFS_ERROR(EFAULT);
1272 if (bm.bmv_count < 2)
1273 return -XFS_ERROR(EINVAL);
1275 iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1276 if (ioflags & IO_INVIS)
1277 iflags |= BMV_IF_NO_DMAPI_READ;
1279 error = xfs_getbmap(ip, &bm, (struct getbmap __user *)arg+1, iflags);
1283 if (copy_to_user(arg, &bm, sizeof(bm)))
1284 return -XFS_ERROR(EFAULT);
1290 struct xfs_inode *ip,
1293 struct getbmapx bmx;
1298 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1299 return -XFS_ERROR(EFAULT);
1301 if (bmx.bmv_count < 2)
1302 return -XFS_ERROR(EINVAL);
1305 * Map input getbmapx structure to a getbmap
1306 * structure for xfs_getbmap.
1308 GETBMAP_CONVERT(bmx, bm);
1310 iflags = bmx.bmv_iflags;
1312 if (iflags & (~BMV_IF_VALID))
1313 return -XFS_ERROR(EINVAL);
1315 iflags |= BMV_IF_EXTENDED;
1317 error = xfs_getbmap(ip, &bm, (struct getbmapx __user *)arg+1, iflags);
1321 GETBMAP_CONVERT(bm, bmx);
1323 if (copy_to_user(arg, &bmx, sizeof(bmx)))
1324 return -XFS_ERROR(EFAULT);
1337 struct inode *inode = filp->f_path.dentry->d_inode;
1338 xfs_mount_t *mp = ip->i_mount;
1341 xfs_itrace_entry(XFS_I(inode));
1344 case XFS_IOC_ALLOCSP:
1345 case XFS_IOC_FREESP:
1346 case XFS_IOC_RESVSP:
1347 case XFS_IOC_UNRESVSP:
1348 case XFS_IOC_ALLOCSP64:
1349 case XFS_IOC_FREESP64:
1350 case XFS_IOC_RESVSP64:
1351 case XFS_IOC_UNRESVSP64:
1353 * Only allow the sys admin to reserve space unless
1354 * unwritten extents are enabled.
1356 if (!xfs_sb_version_hasextflgbit(&mp->m_sb) &&
1357 !capable(CAP_SYS_ADMIN))
1360 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, arg);
1362 case XFS_IOC_DIOINFO: {
1364 xfs_buftarg_t *target =
1365 XFS_IS_REALTIME_INODE(ip) ?
1366 mp->m_rtdev_targp : mp->m_ddev_targp;
1368 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1369 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1371 if (copy_to_user(arg, &da, sizeof(da)))
1372 return -XFS_ERROR(EFAULT);
1376 case XFS_IOC_FSBULKSTAT_SINGLE:
1377 case XFS_IOC_FSBULKSTAT:
1378 case XFS_IOC_FSINUMBERS:
1379 return xfs_ioc_bulkstat(mp, cmd, arg);
1381 case XFS_IOC_FSGEOMETRY_V1:
1382 return xfs_ioc_fsgeometry_v1(mp, arg);
1384 case XFS_IOC_FSGEOMETRY:
1385 return xfs_ioc_fsgeometry(mp, arg);
1387 case XFS_IOC_GETVERSION:
1388 return put_user(inode->i_generation, (int __user *)arg);
1390 case XFS_IOC_FSGETXATTR:
1391 return xfs_ioc_fsgetxattr(ip, 0, arg);
1392 case XFS_IOC_FSGETXATTRA:
1393 return xfs_ioc_fsgetxattr(ip, 1, arg);
1394 case XFS_IOC_FSSETXATTR:
1395 return xfs_ioc_fssetxattr(ip, filp, arg);
1396 case XFS_IOC_GETXFLAGS:
1397 return xfs_ioc_getxflags(ip, arg);
1398 case XFS_IOC_SETXFLAGS:
1399 return xfs_ioc_setxflags(ip, filp, arg);
1401 case XFS_IOC_FSSETDM: {
1402 struct fsdmidata dmi;
1404 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1405 return -XFS_ERROR(EFAULT);
1407 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1412 case XFS_IOC_GETBMAP:
1413 case XFS_IOC_GETBMAPA:
1414 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1416 case XFS_IOC_GETBMAPX:
1417 return xfs_ioc_getbmapx(ip, arg);
1419 case XFS_IOC_FD_TO_HANDLE:
1420 case XFS_IOC_PATH_TO_HANDLE:
1421 case XFS_IOC_PATH_TO_FSHANDLE:
1422 return xfs_find_handle(cmd, arg);
1424 case XFS_IOC_OPEN_BY_HANDLE:
1425 return xfs_open_by_handle(mp, arg, filp, inode);
1427 case XFS_IOC_FSSETDM_BY_HANDLE:
1428 return xfs_fssetdm_by_handle(mp, arg, inode);
1430 case XFS_IOC_READLINK_BY_HANDLE:
1431 return xfs_readlink_by_handle(mp, arg, inode);
1433 case XFS_IOC_ATTRLIST_BY_HANDLE:
1434 return xfs_attrlist_by_handle(mp, arg, inode);
1436 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1437 return xfs_attrmulti_by_handle(mp, arg, filp, inode);
1439 case XFS_IOC_SWAPEXT: {
1440 error = xfs_swapext((struct xfs_swapext __user *)arg);
1444 case XFS_IOC_FSCOUNTS: {
1445 xfs_fsop_counts_t out;
1447 error = xfs_fs_counts(mp, &out);
1451 if (copy_to_user(arg, &out, sizeof(out)))
1452 return -XFS_ERROR(EFAULT);
1456 case XFS_IOC_SET_RESBLKS: {
1457 xfs_fsop_resblks_t inout;
1460 if (!capable(CAP_SYS_ADMIN))
1463 if (copy_from_user(&inout, arg, sizeof(inout)))
1464 return -XFS_ERROR(EFAULT);
1466 /* input parameter is passed in resblks field of structure */
1468 error = xfs_reserve_blocks(mp, &in, &inout);
1472 if (copy_to_user(arg, &inout, sizeof(inout)))
1473 return -XFS_ERROR(EFAULT);
1477 case XFS_IOC_GET_RESBLKS: {
1478 xfs_fsop_resblks_t out;
1480 if (!capable(CAP_SYS_ADMIN))
1483 error = xfs_reserve_blocks(mp, NULL, &out);
1487 if (copy_to_user(arg, &out, sizeof(out)))
1488 return -XFS_ERROR(EFAULT);
1493 case XFS_IOC_FSGROWFSDATA: {
1494 xfs_growfs_data_t in;
1496 if (!capable(CAP_SYS_ADMIN))
1499 if (copy_from_user(&in, arg, sizeof(in)))
1500 return -XFS_ERROR(EFAULT);
1502 error = xfs_growfs_data(mp, &in);
1506 case XFS_IOC_FSGROWFSLOG: {
1507 xfs_growfs_log_t in;
1509 if (!capable(CAP_SYS_ADMIN))
1512 if (copy_from_user(&in, arg, sizeof(in)))
1513 return -XFS_ERROR(EFAULT);
1515 error = xfs_growfs_log(mp, &in);
1519 case XFS_IOC_FSGROWFSRT: {
1522 if (!capable(CAP_SYS_ADMIN))
1525 if (copy_from_user(&in, arg, sizeof(in)))
1526 return -XFS_ERROR(EFAULT);
1528 error = xfs_growfs_rt(mp, &in);
1532 case XFS_IOC_FREEZE:
1533 if (!capable(CAP_SYS_ADMIN))
1536 if (inode->i_sb->s_frozen == SB_UNFROZEN)
1537 freeze_bdev(inode->i_sb->s_bdev);
1541 if (!capable(CAP_SYS_ADMIN))
1543 if (inode->i_sb->s_frozen != SB_UNFROZEN)
1544 thaw_bdev(inode->i_sb->s_bdev, inode->i_sb);
1547 case XFS_IOC_GOINGDOWN: {
1550 if (!capable(CAP_SYS_ADMIN))
1553 if (get_user(in, (__uint32_t __user *)arg))
1554 return -XFS_ERROR(EFAULT);
1556 error = xfs_fs_goingdown(mp, in);
1560 case XFS_IOC_ERROR_INJECTION: {
1561 xfs_error_injection_t in;
1563 if (!capable(CAP_SYS_ADMIN))
1566 if (copy_from_user(&in, arg, sizeof(in)))
1567 return -XFS_ERROR(EFAULT);
1569 error = xfs_errortag_add(in.errtag, mp);
1573 case XFS_IOC_ERROR_CLEARALL:
1574 if (!capable(CAP_SYS_ADMIN))
1577 error = xfs_errortag_clearall(mp, 1);