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
20 #include "xfs_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
24 #include "xfs_mount.h"
25 #include "xfs_inode.h"
26 #include "xfs_ioctl.h"
27 #include "xfs_alloc.h"
28 #include "xfs_rtalloc.h"
29 #include "xfs_itable.h"
30 #include "xfs_error.h"
33 #include "xfs_bmap_util.h"
34 #include "xfs_fsops.h"
35 #include "xfs_discard.h"
36 #include "xfs_quota.h"
37 #include "xfs_export.h"
38 #include "xfs_trace.h"
39 #include "xfs_icache.h"
40 #include "xfs_symlink.h"
41 #include "xfs_trans.h"
44 #include <linux/capability.h>
45 #include <linux/dcache.h>
46 #include <linux/mount.h>
47 #include <linux/namei.h>
48 #include <linux/pagemap.h>
49 #include <linux/slab.h>
50 #include <linux/exportfs.h>
53 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
54 * a file or fs handle.
56 * XFS_IOC_PATH_TO_FSHANDLE
57 * returns fs handle for a mount point or path within that mount point
58 * XFS_IOC_FD_TO_HANDLE
59 * returns full handle for a FD opened in user space
60 * XFS_IOC_PATH_TO_HANDLE
61 * returns full handle for a path
66 xfs_fsop_handlereq_t *hreq)
76 if (cmd == XFS_IOC_FD_TO_HANDLE) {
80 inode = file_inode(f.file);
82 error = user_lpath((const char __user *)hreq->path, &path);
85 inode = d_inode(path.dentry);
90 * We can only generate handles for inodes residing on a XFS filesystem,
91 * and only for regular files, directories or symbolic links.
94 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
98 if (!S_ISREG(inode->i_mode) &&
99 !S_ISDIR(inode->i_mode) &&
100 !S_ISLNK(inode->i_mode))
104 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
106 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
108 * This handle only contains an fsid, zero the rest.
110 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
111 hsize = sizeof(xfs_fsid_t);
113 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
114 sizeof(handle.ha_fid.fid_len);
115 handle.ha_fid.fid_pad = 0;
116 handle.ha_fid.fid_gen = ip->i_d.di_gen;
117 handle.ha_fid.fid_ino = ip->i_ino;
119 hsize = XFS_HSIZE(handle);
123 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
124 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
130 if (cmd == XFS_IOC_FD_TO_HANDLE)
138 * No need to do permission checks on the various pathname components
139 * as the handle operations are privileged.
142 xfs_handle_acceptable(
144 struct dentry *dentry)
150 * Convert userspace handle data into a dentry.
153 xfs_handle_to_dentry(
154 struct file *parfilp,
155 void __user *uhandle,
159 struct xfs_fid64 fid;
162 * Only allow handle opens under a directory.
164 if (!S_ISDIR(file_inode(parfilp)->i_mode))
165 return ERR_PTR(-ENOTDIR);
167 if (hlen != sizeof(xfs_handle_t))
168 return ERR_PTR(-EINVAL);
169 if (copy_from_user(&handle, uhandle, hlen))
170 return ERR_PTR(-EFAULT);
171 if (handle.ha_fid.fid_len !=
172 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
173 return ERR_PTR(-EINVAL);
175 memset(&fid, 0, sizeof(struct fid));
176 fid.ino = handle.ha_fid.fid_ino;
177 fid.gen = handle.ha_fid.fid_gen;
179 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
180 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
181 xfs_handle_acceptable, NULL);
184 STATIC struct dentry *
185 xfs_handlereq_to_dentry(
186 struct file *parfilp,
187 xfs_fsop_handlereq_t *hreq)
189 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
194 struct file *parfilp,
195 xfs_fsop_handlereq_t *hreq)
197 const struct cred *cred = current_cred();
203 struct dentry *dentry;
207 if (!capable(CAP_SYS_ADMIN))
210 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
212 return PTR_ERR(dentry);
213 inode = d_inode(dentry);
215 /* Restrict xfs_open_by_handle to directories & regular files. */
216 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
221 #if BITS_PER_LONG != 32
222 hreq->oflags |= O_LARGEFILE;
225 permflag = hreq->oflags;
226 fmode = OPEN_FMODE(permflag);
227 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
228 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
233 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
238 /* Can't write directories. */
239 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
244 fd = get_unused_fd_flags(0);
250 path.mnt = parfilp->f_path.mnt;
251 path.dentry = dentry;
252 filp = dentry_open(&path, hreq->oflags, cred);
256 return PTR_ERR(filp);
259 if (S_ISREG(inode->i_mode)) {
260 filp->f_flags |= O_NOATIME;
261 filp->f_mode |= FMODE_NOCMTIME;
264 fd_install(fd, filp);
273 xfs_readlink_by_handle(
274 struct file *parfilp,
275 xfs_fsop_handlereq_t *hreq)
277 struct dentry *dentry;
282 if (!capable(CAP_SYS_ADMIN))
285 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
287 return PTR_ERR(dentry);
289 /* Restrict this handle operation to symlinks only. */
290 if (!d_is_symlink(dentry)) {
295 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
300 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
306 error = xfs_readlink(XFS_I(d_inode(dentry)), link);
309 error = readlink_copy(hreq->ohandle, olen, link);
326 xfs_mount_t *mp = ip->i_mount;
330 if (!capable(CAP_SYS_ADMIN))
333 if (XFS_FORCED_SHUTDOWN(mp))
336 tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS);
337 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
339 xfs_trans_cancel(tp);
342 xfs_ilock(ip, XFS_ILOCK_EXCL);
343 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
345 ip->i_d.di_dmevmask = evmask;
346 ip->i_d.di_dmstate = state;
348 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
349 error = xfs_trans_commit(tp);
355 xfs_fssetdm_by_handle(
356 struct file *parfilp,
360 struct fsdmidata fsd;
361 xfs_fsop_setdm_handlereq_t dmhreq;
362 struct dentry *dentry;
364 if (!capable(CAP_MKNOD))
366 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
369 error = mnt_want_write_file(parfilp);
373 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
374 if (IS_ERR(dentry)) {
375 mnt_drop_write_file(parfilp);
376 return PTR_ERR(dentry);
379 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
384 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
389 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
393 mnt_drop_write_file(parfilp);
399 xfs_attrlist_by_handle(
400 struct file *parfilp,
404 attrlist_cursor_kern_t *cursor;
405 xfs_fsop_attrlist_handlereq_t al_hreq;
406 struct dentry *dentry;
409 if (!capable(CAP_SYS_ADMIN))
411 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
413 if (al_hreq.buflen < sizeof(struct attrlist) ||
414 al_hreq.buflen > XATTR_LIST_MAX)
418 * Reject flags, only allow namespaces.
420 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
423 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
425 return PTR_ERR(dentry);
427 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
431 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
432 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
433 al_hreq.flags, cursor);
437 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
448 xfs_attrmulti_attr_get(
451 unsigned char __user *ubuf,
458 if (*len > XATTR_SIZE_MAX)
460 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
464 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
468 if (copy_to_user(ubuf, kbuf, *len))
477 xfs_attrmulti_attr_set(
480 const unsigned char __user *ubuf,
486 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
488 if (len > XATTR_SIZE_MAX)
491 kbuf = memdup_user(ubuf, len);
493 return PTR_ERR(kbuf);
495 return xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
499 xfs_attrmulti_attr_remove(
504 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
506 return xfs_attr_remove(XFS_I(inode), name, flags);
510 xfs_attrmulti_by_handle(
511 struct file *parfilp,
515 xfs_attr_multiop_t *ops;
516 xfs_fsop_attrmulti_handlereq_t am_hreq;
517 struct dentry *dentry;
518 unsigned int i, size;
519 unsigned char *attr_name;
521 if (!capable(CAP_SYS_ADMIN))
523 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
527 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
530 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
532 return PTR_ERR(dentry);
535 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
536 if (!size || size > 16 * PAGE_SIZE)
539 ops = memdup_user(am_hreq.ops, size);
541 error = PTR_ERR(ops);
546 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
551 for (i = 0; i < am_hreq.opcount; i++) {
552 ops[i].am_error = strncpy_from_user((char *)attr_name,
553 ops[i].am_attrname, MAXNAMELEN);
554 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
556 if (ops[i].am_error < 0)
559 switch (ops[i].am_opcode) {
561 ops[i].am_error = xfs_attrmulti_attr_get(
562 d_inode(dentry), attr_name,
563 ops[i].am_attrvalue, &ops[i].am_length,
567 ops[i].am_error = mnt_want_write_file(parfilp);
570 ops[i].am_error = xfs_attrmulti_attr_set(
571 d_inode(dentry), attr_name,
572 ops[i].am_attrvalue, ops[i].am_length,
574 mnt_drop_write_file(parfilp);
577 ops[i].am_error = mnt_want_write_file(parfilp);
580 ops[i].am_error = xfs_attrmulti_attr_remove(
581 d_inode(dentry), attr_name,
583 mnt_drop_write_file(parfilp);
586 ops[i].am_error = -EINVAL;
590 if (copy_to_user(am_hreq.ops, ops, size))
603 struct xfs_inode *ip,
611 enum xfs_prealloc_flags flags = 0;
612 uint iolock = XFS_IOLOCK_EXCL;
616 * Only allow the sys admin to reserve space unless
617 * unwritten extents are enabled.
619 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
620 !capable(CAP_SYS_ADMIN))
623 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
626 if (!(filp->f_mode & FMODE_WRITE))
629 if (!S_ISREG(inode->i_mode))
632 if (filp->f_flags & O_DSYNC)
633 flags |= XFS_PREALLOC_SYNC;
634 if (ioflags & XFS_IO_INVIS)
635 flags |= XFS_PREALLOC_INVISIBLE;
637 error = mnt_want_write_file(filp);
641 xfs_ilock(ip, iolock);
642 error = xfs_break_layouts(inode, &iolock, false);
646 xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
647 iolock |= XFS_MMAPLOCK_EXCL;
649 switch (bf->l_whence) {
653 bf->l_start += filp->f_pos;
656 bf->l_start += XFS_ISIZE(ip);
664 * length of <= 0 for resv/unresv/zero is invalid. length for
665 * alloc/free is ignored completely and we have no idea what userspace
666 * might have set it to, so set it to zero to allow range
670 case XFS_IOC_ZERO_RANGE:
672 case XFS_IOC_RESVSP64:
673 case XFS_IOC_UNRESVSP:
674 case XFS_IOC_UNRESVSP64:
675 if (bf->l_len <= 0) {
685 if (bf->l_start < 0 ||
686 bf->l_start > inode->i_sb->s_maxbytes ||
687 bf->l_start + bf->l_len < 0 ||
688 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
694 case XFS_IOC_ZERO_RANGE:
695 flags |= XFS_PREALLOC_SET;
696 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
699 case XFS_IOC_RESVSP64:
700 flags |= XFS_PREALLOC_SET;
701 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
704 case XFS_IOC_UNRESVSP:
705 case XFS_IOC_UNRESVSP64:
706 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
708 case XFS_IOC_ALLOCSP:
709 case XFS_IOC_ALLOCSP64:
711 case XFS_IOC_FREESP64:
712 flags |= XFS_PREALLOC_CLEAR;
713 if (bf->l_start > XFS_ISIZE(ip)) {
714 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
715 bf->l_start - XFS_ISIZE(ip), 0);
720 iattr.ia_valid = ATTR_SIZE;
721 iattr.ia_size = bf->l_start;
723 error = xfs_setattr_size(ip, &iattr);
733 error = xfs_update_prealloc_flags(ip, flags);
736 xfs_iunlock(ip, iolock);
737 mnt_drop_write_file(filp);
747 xfs_fsop_bulkreq_t bulkreq;
748 int count; /* # of records returned */
749 xfs_ino_t inlast; /* last inode number */
753 /* done = 1 if there are more stats to get and if bulkstat */
754 /* should be called again (unused here, but used in dmapi) */
756 if (!capable(CAP_SYS_ADMIN))
759 if (XFS_FORCED_SHUTDOWN(mp))
762 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
765 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
768 if ((count = bulkreq.icount) <= 0)
771 if (bulkreq.ubuffer == NULL)
774 if (cmd == XFS_IOC_FSINUMBERS)
775 error = xfs_inumbers(mp, &inlast, &count,
776 bulkreq.ubuffer, xfs_inumbers_fmt);
777 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
778 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
779 sizeof(xfs_bstat_t), NULL, &done);
780 else /* XFS_IOC_FSBULKSTAT */
781 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
782 sizeof(xfs_bstat_t), bulkreq.ubuffer,
788 if (bulkreq.ocount != NULL) {
789 if (copy_to_user(bulkreq.lastip, &inlast,
793 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
801 xfs_ioc_fsgeometry_v1(
805 xfs_fsop_geom_t fsgeo;
808 error = xfs_fs_geometry(mp, &fsgeo, 3);
813 * Caller should have passed an argument of type
814 * xfs_fsop_geom_v1_t. This is a proper subset of the
815 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
817 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
827 xfs_fsop_geom_t fsgeo;
830 error = xfs_fs_geometry(mp, &fsgeo, 4);
834 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
840 * Linux extended inode flags interface.
844 xfs_merge_ioc_xflags(
848 unsigned int xflags = start;
850 if (flags & FS_IMMUTABLE_FL)
851 xflags |= XFS_XFLAG_IMMUTABLE;
853 xflags &= ~XFS_XFLAG_IMMUTABLE;
854 if (flags & FS_APPEND_FL)
855 xflags |= XFS_XFLAG_APPEND;
857 xflags &= ~XFS_XFLAG_APPEND;
858 if (flags & FS_SYNC_FL)
859 xflags |= XFS_XFLAG_SYNC;
861 xflags &= ~XFS_XFLAG_SYNC;
862 if (flags & FS_NOATIME_FL)
863 xflags |= XFS_XFLAG_NOATIME;
865 xflags &= ~XFS_XFLAG_NOATIME;
866 if (flags & FS_NODUMP_FL)
867 xflags |= XFS_XFLAG_NODUMP;
869 xflags &= ~XFS_XFLAG_NODUMP;
878 unsigned int flags = 0;
880 if (di_flags & XFS_DIFLAG_IMMUTABLE)
881 flags |= FS_IMMUTABLE_FL;
882 if (di_flags & XFS_DIFLAG_APPEND)
883 flags |= FS_APPEND_FL;
884 if (di_flags & XFS_DIFLAG_SYNC)
886 if (di_flags & XFS_DIFLAG_NOATIME)
887 flags |= FS_NOATIME_FL;
888 if (di_flags & XFS_DIFLAG_NODUMP)
889 flags |= FS_NODUMP_FL;
901 memset(&fa, 0, sizeof(struct fsxattr));
903 xfs_ilock(ip, XFS_ILOCK_SHARED);
904 fa.fsx_xflags = xfs_ip2xflags(ip);
905 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
906 fa.fsx_projid = xfs_get_projid(ip);
910 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
911 fa.fsx_nextents = ip->i_afp->if_bytes /
912 sizeof(xfs_bmbt_rec_t);
914 fa.fsx_nextents = ip->i_d.di_anextents;
918 if (ip->i_df.if_flags & XFS_IFEXTENTS)
919 fa.fsx_nextents = ip->i_df.if_bytes /
920 sizeof(xfs_bmbt_rec_t);
922 fa.fsx_nextents = ip->i_d.di_nextents;
924 xfs_iunlock(ip, XFS_ILOCK_SHARED);
926 if (copy_to_user(arg, &fa, sizeof(fa)))
933 struct xfs_inode *ip,
936 unsigned int di_flags;
938 /* can't set PREALLOC this way, just preserve it */
939 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
940 if (xflags & XFS_XFLAG_IMMUTABLE)
941 di_flags |= XFS_DIFLAG_IMMUTABLE;
942 if (xflags & XFS_XFLAG_APPEND)
943 di_flags |= XFS_DIFLAG_APPEND;
944 if (xflags & XFS_XFLAG_SYNC)
945 di_flags |= XFS_DIFLAG_SYNC;
946 if (xflags & XFS_XFLAG_NOATIME)
947 di_flags |= XFS_DIFLAG_NOATIME;
948 if (xflags & XFS_XFLAG_NODUMP)
949 di_flags |= XFS_DIFLAG_NODUMP;
950 if (xflags & XFS_XFLAG_NODEFRAG)
951 di_flags |= XFS_DIFLAG_NODEFRAG;
952 if (xflags & XFS_XFLAG_FILESTREAM)
953 di_flags |= XFS_DIFLAG_FILESTREAM;
954 if (S_ISDIR(ip->i_d.di_mode)) {
955 if (xflags & XFS_XFLAG_RTINHERIT)
956 di_flags |= XFS_DIFLAG_RTINHERIT;
957 if (xflags & XFS_XFLAG_NOSYMLINKS)
958 di_flags |= XFS_DIFLAG_NOSYMLINKS;
959 if (xflags & XFS_XFLAG_EXTSZINHERIT)
960 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
961 if (xflags & XFS_XFLAG_PROJINHERIT)
962 di_flags |= XFS_DIFLAG_PROJINHERIT;
963 } else if (S_ISREG(ip->i_d.di_mode)) {
964 if (xflags & XFS_XFLAG_REALTIME)
965 di_flags |= XFS_DIFLAG_REALTIME;
966 if (xflags & XFS_XFLAG_EXTSIZE)
967 di_flags |= XFS_DIFLAG_EXTSIZE;
970 ip->i_d.di_flags = di_flags;
974 xfs_diflags_to_linux(
975 struct xfs_inode *ip)
977 struct inode *inode = VFS_I(ip);
978 unsigned int xflags = xfs_ip2xflags(ip);
980 if (xflags & XFS_XFLAG_IMMUTABLE)
981 inode->i_flags |= S_IMMUTABLE;
983 inode->i_flags &= ~S_IMMUTABLE;
984 if (xflags & XFS_XFLAG_APPEND)
985 inode->i_flags |= S_APPEND;
987 inode->i_flags &= ~S_APPEND;
988 if (xflags & XFS_XFLAG_SYNC)
989 inode->i_flags |= S_SYNC;
991 inode->i_flags &= ~S_SYNC;
992 if (xflags & XFS_XFLAG_NOATIME)
993 inode->i_flags |= S_NOATIME;
995 inode->i_flags &= ~S_NOATIME;
999 xfs_ioctl_setattr_xflags(
1000 struct xfs_trans *tp,
1001 struct xfs_inode *ip,
1004 struct xfs_mount *mp = ip->i_mount;
1006 /* Can't change realtime flag if any extents are allocated. */
1007 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1008 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & XFS_XFLAG_REALTIME))
1011 /* If realtime flag is set then must have realtime device */
1012 if (fa->fsx_xflags & XFS_XFLAG_REALTIME) {
1013 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1014 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1019 * Can't modify an immutable/append-only file unless
1020 * we have appropriate permission.
1022 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1023 (fa->fsx_xflags & (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1024 !capable(CAP_LINUX_IMMUTABLE))
1027 xfs_set_diflags(ip, fa->fsx_xflags);
1028 xfs_diflags_to_linux(ip);
1029 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1030 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1031 XFS_STATS_INC(xs_ig_attrchg);
1036 * Set up the transaction structure for the setattr operation, checking that we
1037 * have permission to do so. On success, return a clean transaction and the
1038 * inode locked exclusively ready for further operation specific checks. On
1039 * failure, return an error without modifying or locking the inode.
1041 static struct xfs_trans *
1042 xfs_ioctl_setattr_get_trans(
1043 struct xfs_inode *ip)
1045 struct xfs_mount *mp = ip->i_mount;
1046 struct xfs_trans *tp;
1049 if (mp->m_flags & XFS_MOUNT_RDONLY)
1050 return ERR_PTR(-EROFS);
1051 if (XFS_FORCED_SHUTDOWN(mp))
1052 return ERR_PTR(-EIO);
1054 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
1055 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
1059 xfs_ilock(ip, XFS_ILOCK_EXCL);
1060 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1063 * CAP_FOWNER overrides the following restrictions:
1065 * The user ID of the calling process must be equal to the file owner
1066 * ID, except in cases where the CAP_FSETID capability is applicable.
1068 if (!inode_owner_or_capable(VFS_I(ip))) {
1073 if (mp->m_flags & XFS_MOUNT_WSYNC)
1074 xfs_trans_set_sync(tp);
1079 xfs_trans_cancel(tp);
1080 return ERR_PTR(error);
1084 * extent size hint validation is somewhat cumbersome. Rules are:
1086 * 1. extent size hint is only valid for directories and regular files
1087 * 2. XFS_XFLAG_EXTSIZE is only valid for regular files
1088 * 3. XFS_XFLAG_EXTSZINHERIT is only valid for directories.
1089 * 4. can only be changed on regular files if no extents are allocated
1090 * 5. can be changed on directories at any time
1091 * 6. extsize hint of 0 turns off hints, clears inode flags.
1092 * 7. Extent size must be a multiple of the appropriate block size.
1093 * 8. for non-realtime files, the extent size hint must be limited
1094 * to half the AG size to avoid alignment extending the extent beyond the
1098 xfs_ioctl_setattr_check_extsize(
1099 struct xfs_inode *ip,
1102 struct xfs_mount *mp = ip->i_mount;
1104 if ((fa->fsx_xflags & XFS_XFLAG_EXTSIZE) && !S_ISREG(ip->i_d.di_mode))
1107 if ((fa->fsx_xflags & XFS_XFLAG_EXTSZINHERIT) &&
1108 !S_ISDIR(ip->i_d.di_mode))
1111 if (S_ISREG(ip->i_d.di_mode) && ip->i_d.di_nextents &&
1112 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1115 if (fa->fsx_extsize != 0) {
1117 xfs_fsblock_t extsize_fsb;
1119 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1120 if (extsize_fsb > MAXEXTLEN)
1123 if (XFS_IS_REALTIME_INODE(ip) ||
1124 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1125 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1127 size = mp->m_sb.sb_blocksize;
1128 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1132 if (fa->fsx_extsize % size)
1135 fa->fsx_xflags &= ~(XFS_XFLAG_EXTSIZE | XFS_XFLAG_EXTSZINHERIT);
1141 xfs_ioctl_setattr_check_projid(
1142 struct xfs_inode *ip,
1145 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1146 if (fa->fsx_projid > (__uint16_t)-1 &&
1147 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1151 * Project Quota ID state is only allowed to change from within the init
1152 * namespace. Enforce that restriction only if we are trying to change
1153 * the quota ID state. Everything else is allowed in user namespaces.
1155 if (current_user_ns() == &init_user_ns)
1158 if (xfs_get_projid(ip) != fa->fsx_projid)
1160 if ((fa->fsx_xflags & XFS_XFLAG_PROJINHERIT) !=
1161 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1172 struct xfs_mount *mp = ip->i_mount;
1173 struct xfs_trans *tp;
1174 struct xfs_dquot *udqp = NULL;
1175 struct xfs_dquot *pdqp = NULL;
1176 struct xfs_dquot *olddquot = NULL;
1179 trace_xfs_ioctl_setattr(ip);
1181 code = xfs_ioctl_setattr_check_projid(ip, fa);
1186 * If disk quotas is on, we make sure that the dquots do exist on disk,
1187 * before we start any other transactions. Trying to do this later
1188 * is messy. We don't care to take a readlock to look at the ids
1189 * in inode here, because we can't hold it across the trans_reserve.
1190 * If the IDs do change before we take the ilock, we're covered
1191 * because the i_*dquot fields will get updated anyway.
1193 if (XFS_IS_QUOTA_ON(mp)) {
1194 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1195 ip->i_d.di_gid, fa->fsx_projid,
1196 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1201 tp = xfs_ioctl_setattr_get_trans(ip);
1204 goto error_free_dquots;
1208 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1209 xfs_get_projid(ip) != fa->fsx_projid) {
1210 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1211 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1212 if (code) /* out of quota */
1213 goto error_trans_cancel;
1216 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1218 goto error_trans_cancel;
1220 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1222 goto error_trans_cancel;
1225 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1226 * overrides the following restrictions:
1228 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1229 * successful return from chown()
1232 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1233 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1234 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1236 /* Change the ownerships and register project quota modifications */
1237 if (xfs_get_projid(ip) != fa->fsx_projid) {
1238 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1239 olddquot = xfs_qm_vop_chown(tp, ip,
1240 &ip->i_pdquot, pdqp);
1242 ASSERT(ip->i_d.di_version > 1);
1243 xfs_set_projid(ip, fa->fsx_projid);
1247 * Only set the extent size hint if we've already determined that the
1248 * extent size hint should be set on the inode. If no extent size flags
1249 * are set on the inode then unconditionally clear the extent size hint.
1251 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1252 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1254 ip->i_d.di_extsize = 0;
1256 code = xfs_trans_commit(tp);
1259 * Release any dquot(s) the inode had kept before chown.
1261 xfs_qm_dqrele(olddquot);
1262 xfs_qm_dqrele(udqp);
1263 xfs_qm_dqrele(pdqp);
1268 xfs_trans_cancel(tp);
1270 xfs_qm_dqrele(udqp);
1271 xfs_qm_dqrele(pdqp);
1284 if (copy_from_user(&fa, arg, sizeof(fa)))
1287 error = mnt_want_write_file(filp);
1290 error = xfs_ioctl_setattr(ip, &fa);
1291 mnt_drop_write_file(filp);
1302 flags = xfs_di2lxflags(ip->i_d.di_flags);
1303 if (copy_to_user(arg, &flags, sizeof(flags)))
1310 struct xfs_inode *ip,
1314 struct xfs_trans *tp;
1319 if (copy_from_user(&flags, arg, sizeof(flags)))
1322 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1323 FS_NOATIME_FL | FS_NODUMP_FL | \
1327 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1329 error = mnt_want_write_file(filp);
1333 tp = xfs_ioctl_setattr_get_trans(ip);
1335 error = PTR_ERR(tp);
1336 goto out_drop_write;
1339 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1341 xfs_trans_cancel(tp);
1342 goto out_drop_write;
1345 error = xfs_trans_commit(tp);
1347 mnt_drop_write_file(filp);
1352 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1354 struct getbmap __user *base = (struct getbmap __user *)*ap;
1356 /* copy only getbmap portion (not getbmapx) */
1357 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1360 *ap += sizeof(struct getbmap);
1366 struct xfs_inode *ip,
1371 struct getbmapx bmx;
1374 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1377 if (bmx.bmv_count < 2)
1380 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1381 if (ioflags & XFS_IO_INVIS)
1382 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1384 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1385 (__force struct getbmap *)arg+1);
1389 /* copy back header - only size of getbmap */
1390 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1396 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1398 struct getbmapx __user *base = (struct getbmapx __user *)*ap;
1400 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1403 *ap += sizeof(struct getbmapx);
1409 struct xfs_inode *ip,
1412 struct getbmapx bmx;
1415 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1418 if (bmx.bmv_count < 2)
1421 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1424 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1425 (__force struct getbmapx *)arg+1);
1429 /* copy back header */
1430 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1440 xfs_inode_t *ip, *tip;
1444 /* Pull information for the target fd */
1445 f = fdget((int)sxp->sx_fdtarget);
1451 if (!(f.file->f_mode & FMODE_WRITE) ||
1452 !(f.file->f_mode & FMODE_READ) ||
1453 (f.file->f_flags & O_APPEND)) {
1458 tmp = fdget((int)sxp->sx_fdtmp);
1464 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1465 !(tmp.file->f_mode & FMODE_READ) ||
1466 (tmp.file->f_flags & O_APPEND)) {
1468 goto out_put_tmp_file;
1471 if (IS_SWAPFILE(file_inode(f.file)) ||
1472 IS_SWAPFILE(file_inode(tmp.file))) {
1474 goto out_put_tmp_file;
1477 ip = XFS_I(file_inode(f.file));
1478 tip = XFS_I(file_inode(tmp.file));
1480 if (ip->i_mount != tip->i_mount) {
1482 goto out_put_tmp_file;
1485 if (ip->i_ino == tip->i_ino) {
1487 goto out_put_tmp_file;
1490 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1492 goto out_put_tmp_file;
1495 error = xfs_swap_extents(ip, tip, sxp);
1506 * Note: some of the ioctl's return positive numbers as a
1507 * byte count indicating success, such as readlink_by_handle.
1508 * So we don't "sign flip" like most other routines. This means
1509 * true errors need to be returned as a negative value.
1517 struct inode *inode = file_inode(filp);
1518 struct xfs_inode *ip = XFS_I(inode);
1519 struct xfs_mount *mp = ip->i_mount;
1520 void __user *arg = (void __user *)p;
1524 if (filp->f_mode & FMODE_NOCMTIME)
1525 ioflags |= XFS_IO_INVIS;
1527 trace_xfs_file_ioctl(ip);
1531 return xfs_ioc_trim(mp, arg);
1532 case XFS_IOC_ALLOCSP:
1533 case XFS_IOC_FREESP:
1534 case XFS_IOC_RESVSP:
1535 case XFS_IOC_UNRESVSP:
1536 case XFS_IOC_ALLOCSP64:
1537 case XFS_IOC_FREESP64:
1538 case XFS_IOC_RESVSP64:
1539 case XFS_IOC_UNRESVSP64:
1540 case XFS_IOC_ZERO_RANGE: {
1543 if (copy_from_user(&bf, arg, sizeof(bf)))
1545 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1547 case XFS_IOC_DIOINFO: {
1549 xfs_buftarg_t *target =
1550 XFS_IS_REALTIME_INODE(ip) ?
1551 mp->m_rtdev_targp : mp->m_ddev_targp;
1553 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1554 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1556 if (copy_to_user(arg, &da, sizeof(da)))
1561 case XFS_IOC_FSBULKSTAT_SINGLE:
1562 case XFS_IOC_FSBULKSTAT:
1563 case XFS_IOC_FSINUMBERS:
1564 return xfs_ioc_bulkstat(mp, cmd, arg);
1566 case XFS_IOC_FSGEOMETRY_V1:
1567 return xfs_ioc_fsgeometry_v1(mp, arg);
1569 case XFS_IOC_FSGEOMETRY:
1570 return xfs_ioc_fsgeometry(mp, arg);
1572 case XFS_IOC_GETVERSION:
1573 return put_user(inode->i_generation, (int __user *)arg);
1575 case XFS_IOC_FSGETXATTR:
1576 return xfs_ioc_fsgetxattr(ip, 0, arg);
1577 case XFS_IOC_FSGETXATTRA:
1578 return xfs_ioc_fsgetxattr(ip, 1, arg);
1579 case XFS_IOC_FSSETXATTR:
1580 return xfs_ioc_fssetxattr(ip, filp, arg);
1581 case XFS_IOC_GETXFLAGS:
1582 return xfs_ioc_getxflags(ip, arg);
1583 case XFS_IOC_SETXFLAGS:
1584 return xfs_ioc_setxflags(ip, filp, arg);
1586 case XFS_IOC_FSSETDM: {
1587 struct fsdmidata dmi;
1589 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1592 error = mnt_want_write_file(filp);
1596 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1598 mnt_drop_write_file(filp);
1602 case XFS_IOC_GETBMAP:
1603 case XFS_IOC_GETBMAPA:
1604 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1606 case XFS_IOC_GETBMAPX:
1607 return xfs_ioc_getbmapx(ip, arg);
1609 case XFS_IOC_FD_TO_HANDLE:
1610 case XFS_IOC_PATH_TO_HANDLE:
1611 case XFS_IOC_PATH_TO_FSHANDLE: {
1612 xfs_fsop_handlereq_t hreq;
1614 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1616 return xfs_find_handle(cmd, &hreq);
1618 case XFS_IOC_OPEN_BY_HANDLE: {
1619 xfs_fsop_handlereq_t hreq;
1621 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1623 return xfs_open_by_handle(filp, &hreq);
1625 case XFS_IOC_FSSETDM_BY_HANDLE:
1626 return xfs_fssetdm_by_handle(filp, arg);
1628 case XFS_IOC_READLINK_BY_HANDLE: {
1629 xfs_fsop_handlereq_t hreq;
1631 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1633 return xfs_readlink_by_handle(filp, &hreq);
1635 case XFS_IOC_ATTRLIST_BY_HANDLE:
1636 return xfs_attrlist_by_handle(filp, arg);
1638 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1639 return xfs_attrmulti_by_handle(filp, arg);
1641 case XFS_IOC_SWAPEXT: {
1642 struct xfs_swapext sxp;
1644 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1646 error = mnt_want_write_file(filp);
1649 error = xfs_ioc_swapext(&sxp);
1650 mnt_drop_write_file(filp);
1654 case XFS_IOC_FSCOUNTS: {
1655 xfs_fsop_counts_t out;
1657 error = xfs_fs_counts(mp, &out);
1661 if (copy_to_user(arg, &out, sizeof(out)))
1666 case XFS_IOC_SET_RESBLKS: {
1667 xfs_fsop_resblks_t inout;
1670 if (!capable(CAP_SYS_ADMIN))
1673 if (mp->m_flags & XFS_MOUNT_RDONLY)
1676 if (copy_from_user(&inout, arg, sizeof(inout)))
1679 error = mnt_want_write_file(filp);
1683 /* input parameter is passed in resblks field of structure */
1685 error = xfs_reserve_blocks(mp, &in, &inout);
1686 mnt_drop_write_file(filp);
1690 if (copy_to_user(arg, &inout, sizeof(inout)))
1695 case XFS_IOC_GET_RESBLKS: {
1696 xfs_fsop_resblks_t out;
1698 if (!capable(CAP_SYS_ADMIN))
1701 error = xfs_reserve_blocks(mp, NULL, &out);
1705 if (copy_to_user(arg, &out, sizeof(out)))
1711 case XFS_IOC_FSGROWFSDATA: {
1712 xfs_growfs_data_t in;
1714 if (copy_from_user(&in, arg, sizeof(in)))
1717 error = mnt_want_write_file(filp);
1720 error = xfs_growfs_data(mp, &in);
1721 mnt_drop_write_file(filp);
1725 case XFS_IOC_FSGROWFSLOG: {
1726 xfs_growfs_log_t in;
1728 if (copy_from_user(&in, arg, sizeof(in)))
1731 error = mnt_want_write_file(filp);
1734 error = xfs_growfs_log(mp, &in);
1735 mnt_drop_write_file(filp);
1739 case XFS_IOC_FSGROWFSRT: {
1742 if (copy_from_user(&in, arg, sizeof(in)))
1745 error = mnt_want_write_file(filp);
1748 error = xfs_growfs_rt(mp, &in);
1749 mnt_drop_write_file(filp);
1753 case XFS_IOC_GOINGDOWN: {
1756 if (!capable(CAP_SYS_ADMIN))
1759 if (get_user(in, (__uint32_t __user *)arg))
1762 return xfs_fs_goingdown(mp, in);
1765 case XFS_IOC_ERROR_INJECTION: {
1766 xfs_error_injection_t in;
1768 if (!capable(CAP_SYS_ADMIN))
1771 if (copy_from_user(&in, arg, sizeof(in)))
1774 return xfs_errortag_add(in.errtag, mp);
1777 case XFS_IOC_ERROR_CLEARALL:
1778 if (!capable(CAP_SYS_ADMIN))
1781 return xfs_errortag_clearall(mp, 1);
1783 case XFS_IOC_FREE_EOFBLOCKS: {
1784 struct xfs_fs_eofblocks eofb;
1785 struct xfs_eofblocks keofb;
1787 if (!capable(CAP_SYS_ADMIN))
1790 if (mp->m_flags & XFS_MOUNT_RDONLY)
1793 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1796 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1800 return xfs_icache_free_eofblocks(mp, &keofb);