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"
26 #include "xfs_mount.h"
27 #include "xfs_inode.h"
28 #include "xfs_ioctl.h"
29 #include "xfs_alloc.h"
30 #include "xfs_rtalloc.h"
31 #include "xfs_itable.h"
32 #include "xfs_error.h"
35 #include "xfs_bmap_util.h"
36 #include "xfs_fsops.h"
37 #include "xfs_discard.h"
38 #include "xfs_quota.h"
39 #include "xfs_export.h"
40 #include "xfs_trace.h"
41 #include "xfs_icache.h"
42 #include "xfs_symlink.h"
43 #include "xfs_trans.h"
45 #include <linux/capability.h>
46 #include <linux/dcache.h>
47 #include <linux/mount.h>
48 #include <linux/namei.h>
49 #include <linux/pagemap.h>
50 #include <linux/slab.h>
51 #include <linux/exportfs.h>
54 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
55 * a file or fs handle.
57 * XFS_IOC_PATH_TO_FSHANDLE
58 * returns fs handle for a mount point or path within that mount point
59 * XFS_IOC_FD_TO_HANDLE
60 * returns full handle for a FD opened in user space
61 * XFS_IOC_PATH_TO_HANDLE
62 * returns full handle for a path
67 xfs_fsop_handlereq_t *hreq)
77 if (cmd == XFS_IOC_FD_TO_HANDLE) {
81 inode = file_inode(f.file);
83 error = user_lpath((const char __user *)hreq->path, &path);
86 inode = path.dentry->d_inode;
91 * We can only generate handles for inodes residing on a XFS filesystem,
92 * and only for regular files, directories or symbolic links.
95 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
99 if (!S_ISREG(inode->i_mode) &&
100 !S_ISDIR(inode->i_mode) &&
101 !S_ISLNK(inode->i_mode))
105 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
107 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
109 * This handle only contains an fsid, zero the rest.
111 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
112 hsize = sizeof(xfs_fsid_t);
114 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
115 sizeof(handle.ha_fid.fid_len);
116 handle.ha_fid.fid_pad = 0;
117 handle.ha_fid.fid_gen = ip->i_d.di_gen;
118 handle.ha_fid.fid_ino = ip->i_ino;
120 hsize = XFS_HSIZE(handle);
124 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
125 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
131 if (cmd == XFS_IOC_FD_TO_HANDLE)
139 * No need to do permission checks on the various pathname components
140 * as the handle operations are privileged.
143 xfs_handle_acceptable(
145 struct dentry *dentry)
151 * Convert userspace handle data into a dentry.
154 xfs_handle_to_dentry(
155 struct file *parfilp,
156 void __user *uhandle,
160 struct xfs_fid64 fid;
163 * Only allow handle opens under a directory.
165 if (!S_ISDIR(file_inode(parfilp)->i_mode))
166 return ERR_PTR(-ENOTDIR);
168 if (hlen != sizeof(xfs_handle_t))
169 return ERR_PTR(-EINVAL);
170 if (copy_from_user(&handle, uhandle, hlen))
171 return ERR_PTR(-EFAULT);
172 if (handle.ha_fid.fid_len !=
173 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
174 return ERR_PTR(-EINVAL);
176 memset(&fid, 0, sizeof(struct fid));
177 fid.ino = handle.ha_fid.fid_ino;
178 fid.gen = handle.ha_fid.fid_gen;
180 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
181 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
182 xfs_handle_acceptable, NULL);
185 STATIC struct dentry *
186 xfs_handlereq_to_dentry(
187 struct file *parfilp,
188 xfs_fsop_handlereq_t *hreq)
190 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
195 struct file *parfilp,
196 xfs_fsop_handlereq_t *hreq)
198 const struct cred *cred = current_cred();
204 struct dentry *dentry;
208 if (!capable(CAP_SYS_ADMIN))
211 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
213 return PTR_ERR(dentry);
214 inode = dentry->d_inode;
216 /* Restrict xfs_open_by_handle to directories & regular files. */
217 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
222 #if BITS_PER_LONG != 32
223 hreq->oflags |= O_LARGEFILE;
226 permflag = hreq->oflags;
227 fmode = OPEN_FMODE(permflag);
228 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
229 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
234 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
239 /* Can't write directories. */
240 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
245 fd = get_unused_fd_flags(0);
251 path.mnt = parfilp->f_path.mnt;
252 path.dentry = dentry;
253 filp = dentry_open(&path, hreq->oflags, cred);
257 return PTR_ERR(filp);
260 if (S_ISREG(inode->i_mode)) {
261 filp->f_flags |= O_NOATIME;
262 filp->f_mode |= FMODE_NOCMTIME;
265 fd_install(fd, filp);
274 xfs_readlink_by_handle(
275 struct file *parfilp,
276 xfs_fsop_handlereq_t *hreq)
278 struct dentry *dentry;
283 if (!capable(CAP_SYS_ADMIN))
286 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
288 return PTR_ERR(dentry);
290 /* Restrict this handle operation to symlinks only. */
291 if (!S_ISLNK(dentry->d_inode->i_mode)) {
296 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
301 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
307 error = xfs_readlink(XFS_I(dentry->d_inode), link);
310 error = readlink_copy(hreq->ohandle, olen, link);
327 xfs_mount_t *mp = ip->i_mount;
331 if (!capable(CAP_SYS_ADMIN))
334 if (XFS_FORCED_SHUTDOWN(mp))
337 tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS);
338 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
340 xfs_trans_cancel(tp, 0);
343 xfs_ilock(ip, XFS_ILOCK_EXCL);
344 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
346 ip->i_d.di_dmevmask = evmask;
347 ip->i_d.di_dmstate = state;
349 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
350 error = xfs_trans_commit(tp, 0);
356 xfs_fssetdm_by_handle(
357 struct file *parfilp,
361 struct fsdmidata fsd;
362 xfs_fsop_setdm_handlereq_t dmhreq;
363 struct dentry *dentry;
365 if (!capable(CAP_MKNOD))
367 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
370 error = mnt_want_write_file(parfilp);
374 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
375 if (IS_ERR(dentry)) {
376 mnt_drop_write_file(parfilp);
377 return PTR_ERR(dentry);
380 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
385 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
390 error = xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
394 mnt_drop_write_file(parfilp);
400 xfs_attrlist_by_handle(
401 struct file *parfilp,
405 attrlist_cursor_kern_t *cursor;
406 xfs_fsop_attrlist_handlereq_t al_hreq;
407 struct dentry *dentry;
410 if (!capable(CAP_SYS_ADMIN))
412 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
414 if (al_hreq.buflen < sizeof(struct attrlist) ||
415 al_hreq.buflen > XATTR_LIST_MAX)
419 * Reject flags, only allow namespaces.
421 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
424 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
426 return PTR_ERR(dentry);
428 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
432 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
433 error = xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
434 al_hreq.flags, cursor);
438 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
449 xfs_attrmulti_attr_get(
452 unsigned char __user *ubuf,
459 if (*len > XATTR_SIZE_MAX)
461 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
465 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
469 if (copy_to_user(ubuf, kbuf, *len))
478 xfs_attrmulti_attr_set(
481 const unsigned char __user *ubuf,
487 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
489 if (len > XATTR_SIZE_MAX)
492 kbuf = memdup_user(ubuf, len);
494 return PTR_ERR(kbuf);
496 return xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
500 xfs_attrmulti_attr_remove(
505 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
507 return xfs_attr_remove(XFS_I(inode), name, flags);
511 xfs_attrmulti_by_handle(
512 struct file *parfilp,
516 xfs_attr_multiop_t *ops;
517 xfs_fsop_attrmulti_handlereq_t am_hreq;
518 struct dentry *dentry;
519 unsigned int i, size;
520 unsigned char *attr_name;
522 if (!capable(CAP_SYS_ADMIN))
524 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
528 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
531 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
533 return PTR_ERR(dentry);
536 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
537 if (!size || size > 16 * PAGE_SIZE)
540 ops = memdup_user(am_hreq.ops, size);
542 error = PTR_ERR(ops);
547 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
552 for (i = 0; i < am_hreq.opcount; i++) {
553 ops[i].am_error = strncpy_from_user((char *)attr_name,
554 ops[i].am_attrname, MAXNAMELEN);
555 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
557 if (ops[i].am_error < 0)
560 switch (ops[i].am_opcode) {
562 ops[i].am_error = xfs_attrmulti_attr_get(
563 dentry->d_inode, attr_name,
564 ops[i].am_attrvalue, &ops[i].am_length,
568 ops[i].am_error = mnt_want_write_file(parfilp);
571 ops[i].am_error = xfs_attrmulti_attr_set(
572 dentry->d_inode, attr_name,
573 ops[i].am_attrvalue, ops[i].am_length,
575 mnt_drop_write_file(parfilp);
578 ops[i].am_error = mnt_want_write_file(parfilp);
581 ops[i].am_error = xfs_attrmulti_attr_remove(
582 dentry->d_inode, attr_name,
584 mnt_drop_write_file(parfilp);
587 ops[i].am_error = -EINVAL;
591 if (copy_to_user(am_hreq.ops, ops, size))
604 struct xfs_inode *ip,
611 struct xfs_mount *mp = ip->i_mount;
612 struct xfs_trans *tp;
614 bool setprealloc = false;
615 bool clrprealloc = false;
619 * Only allow the sys admin to reserve space unless
620 * unwritten extents are enabled.
622 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
623 !capable(CAP_SYS_ADMIN))
626 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
629 if (!(filp->f_mode & FMODE_WRITE))
632 if (!S_ISREG(inode->i_mode))
635 error = mnt_want_write_file(filp);
639 xfs_ilock(ip, XFS_IOLOCK_EXCL);
641 switch (bf->l_whence) {
645 bf->l_start += filp->f_pos;
648 bf->l_start += XFS_ISIZE(ip);
656 * length of <= 0 for resv/unresv/zero is invalid. length for
657 * alloc/free is ignored completely and we have no idea what userspace
658 * might have set it to, so set it to zero to allow range
662 case XFS_IOC_ZERO_RANGE:
664 case XFS_IOC_RESVSP64:
665 case XFS_IOC_UNRESVSP:
666 case XFS_IOC_UNRESVSP64:
667 if (bf->l_len <= 0) {
677 if (bf->l_start < 0 ||
678 bf->l_start > mp->m_super->s_maxbytes ||
679 bf->l_start + bf->l_len < 0 ||
680 bf->l_start + bf->l_len >= mp->m_super->s_maxbytes) {
686 case XFS_IOC_ZERO_RANGE:
687 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
692 case XFS_IOC_RESVSP64:
693 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
698 case XFS_IOC_UNRESVSP:
699 case XFS_IOC_UNRESVSP64:
700 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
702 case XFS_IOC_ALLOCSP:
703 case XFS_IOC_ALLOCSP64:
705 case XFS_IOC_FREESP64:
706 if (bf->l_start > XFS_ISIZE(ip)) {
707 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
708 bf->l_start - XFS_ISIZE(ip), 0);
713 iattr.ia_valid = ATTR_SIZE;
714 iattr.ia_size = bf->l_start;
716 error = xfs_setattr_size(ip, &iattr);
728 tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID);
729 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_writeid, 0, 0);
731 xfs_trans_cancel(tp, 0);
735 xfs_ilock(ip, XFS_ILOCK_EXCL);
736 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
738 if (!(ioflags & XFS_IO_INVIS)) {
739 ip->i_d.di_mode &= ~S_ISUID;
740 if (ip->i_d.di_mode & S_IXGRP)
741 ip->i_d.di_mode &= ~S_ISGID;
742 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
746 ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC;
747 else if (clrprealloc)
748 ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC;
750 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
751 if (filp->f_flags & O_DSYNC)
752 xfs_trans_set_sync(tp);
753 error = xfs_trans_commit(tp, 0);
756 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
757 mnt_drop_write_file(filp);
767 xfs_fsop_bulkreq_t bulkreq;
768 int count; /* # of records returned */
769 xfs_ino_t inlast; /* last inode number */
773 /* done = 1 if there are more stats to get and if bulkstat */
774 /* should be called again (unused here, but used in dmapi) */
776 if (!capable(CAP_SYS_ADMIN))
779 if (XFS_FORCED_SHUTDOWN(mp))
782 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
785 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
788 if ((count = bulkreq.icount) <= 0)
791 if (bulkreq.ubuffer == NULL)
794 if (cmd == XFS_IOC_FSINUMBERS)
795 error = xfs_inumbers(mp, &inlast, &count,
796 bulkreq.ubuffer, xfs_inumbers_fmt);
797 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
798 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
799 sizeof(xfs_bstat_t), NULL, &done);
800 else /* XFS_IOC_FSBULKSTAT */
801 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
802 sizeof(xfs_bstat_t), bulkreq.ubuffer,
808 if (bulkreq.ocount != NULL) {
809 if (copy_to_user(bulkreq.lastip, &inlast,
813 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
821 xfs_ioc_fsgeometry_v1(
825 xfs_fsop_geom_t fsgeo;
828 error = xfs_fs_geometry(mp, &fsgeo, 3);
833 * Caller should have passed an argument of type
834 * xfs_fsop_geom_v1_t. This is a proper subset of the
835 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
837 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
847 xfs_fsop_geom_t fsgeo;
850 error = xfs_fs_geometry(mp, &fsgeo, 4);
854 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
860 * Linux extended inode flags interface.
864 xfs_merge_ioc_xflags(
868 unsigned int xflags = start;
870 if (flags & FS_IMMUTABLE_FL)
871 xflags |= XFS_XFLAG_IMMUTABLE;
873 xflags &= ~XFS_XFLAG_IMMUTABLE;
874 if (flags & FS_APPEND_FL)
875 xflags |= XFS_XFLAG_APPEND;
877 xflags &= ~XFS_XFLAG_APPEND;
878 if (flags & FS_SYNC_FL)
879 xflags |= XFS_XFLAG_SYNC;
881 xflags &= ~XFS_XFLAG_SYNC;
882 if (flags & FS_NOATIME_FL)
883 xflags |= XFS_XFLAG_NOATIME;
885 xflags &= ~XFS_XFLAG_NOATIME;
886 if (flags & FS_NODUMP_FL)
887 xflags |= XFS_XFLAG_NODUMP;
889 xflags &= ~XFS_XFLAG_NODUMP;
898 unsigned int flags = 0;
900 if (di_flags & XFS_DIFLAG_IMMUTABLE)
901 flags |= FS_IMMUTABLE_FL;
902 if (di_flags & XFS_DIFLAG_APPEND)
903 flags |= FS_APPEND_FL;
904 if (di_flags & XFS_DIFLAG_SYNC)
906 if (di_flags & XFS_DIFLAG_NOATIME)
907 flags |= FS_NOATIME_FL;
908 if (di_flags & XFS_DIFLAG_NODUMP)
909 flags |= FS_NODUMP_FL;
921 memset(&fa, 0, sizeof(struct fsxattr));
923 xfs_ilock(ip, XFS_ILOCK_SHARED);
924 fa.fsx_xflags = xfs_ip2xflags(ip);
925 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
926 fa.fsx_projid = xfs_get_projid(ip);
930 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
931 fa.fsx_nextents = ip->i_afp->if_bytes /
932 sizeof(xfs_bmbt_rec_t);
934 fa.fsx_nextents = ip->i_d.di_anextents;
938 if (ip->i_df.if_flags & XFS_IFEXTENTS)
939 fa.fsx_nextents = ip->i_df.if_bytes /
940 sizeof(xfs_bmbt_rec_t);
942 fa.fsx_nextents = ip->i_d.di_nextents;
944 xfs_iunlock(ip, XFS_ILOCK_SHARED);
946 if (copy_to_user(arg, &fa, sizeof(fa)))
953 struct xfs_inode *ip,
956 unsigned int di_flags;
958 /* can't set PREALLOC this way, just preserve it */
959 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
960 if (xflags & XFS_XFLAG_IMMUTABLE)
961 di_flags |= XFS_DIFLAG_IMMUTABLE;
962 if (xflags & XFS_XFLAG_APPEND)
963 di_flags |= XFS_DIFLAG_APPEND;
964 if (xflags & XFS_XFLAG_SYNC)
965 di_flags |= XFS_DIFLAG_SYNC;
966 if (xflags & XFS_XFLAG_NOATIME)
967 di_flags |= XFS_DIFLAG_NOATIME;
968 if (xflags & XFS_XFLAG_NODUMP)
969 di_flags |= XFS_DIFLAG_NODUMP;
970 if (xflags & XFS_XFLAG_NODEFRAG)
971 di_flags |= XFS_DIFLAG_NODEFRAG;
972 if (xflags & XFS_XFLAG_FILESTREAM)
973 di_flags |= XFS_DIFLAG_FILESTREAM;
974 if (S_ISDIR(ip->i_d.di_mode)) {
975 if (xflags & XFS_XFLAG_RTINHERIT)
976 di_flags |= XFS_DIFLAG_RTINHERIT;
977 if (xflags & XFS_XFLAG_NOSYMLINKS)
978 di_flags |= XFS_DIFLAG_NOSYMLINKS;
979 if (xflags & XFS_XFLAG_EXTSZINHERIT)
980 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
981 if (xflags & XFS_XFLAG_PROJINHERIT)
982 di_flags |= XFS_DIFLAG_PROJINHERIT;
983 } else if (S_ISREG(ip->i_d.di_mode)) {
984 if (xflags & XFS_XFLAG_REALTIME)
985 di_flags |= XFS_DIFLAG_REALTIME;
986 if (xflags & XFS_XFLAG_EXTSIZE)
987 di_flags |= XFS_DIFLAG_EXTSIZE;
990 ip->i_d.di_flags = di_flags;
994 xfs_diflags_to_linux(
995 struct xfs_inode *ip)
997 struct inode *inode = VFS_I(ip);
998 unsigned int xflags = xfs_ip2xflags(ip);
1000 if (xflags & XFS_XFLAG_IMMUTABLE)
1001 inode->i_flags |= S_IMMUTABLE;
1003 inode->i_flags &= ~S_IMMUTABLE;
1004 if (xflags & XFS_XFLAG_APPEND)
1005 inode->i_flags |= S_APPEND;
1007 inode->i_flags &= ~S_APPEND;
1008 if (xflags & XFS_XFLAG_SYNC)
1009 inode->i_flags |= S_SYNC;
1011 inode->i_flags &= ~S_SYNC;
1012 if (xflags & XFS_XFLAG_NOATIME)
1013 inode->i_flags |= S_NOATIME;
1015 inode->i_flags &= ~S_NOATIME;
1018 #define FSX_PROJID 1
1019 #define FSX_EXTSIZE 2
1020 #define FSX_XFLAGS 4
1021 #define FSX_NONBLOCK 8
1029 struct xfs_mount *mp = ip->i_mount;
1030 struct xfs_trans *tp;
1031 unsigned int lock_flags = 0;
1032 struct xfs_dquot *udqp = NULL;
1033 struct xfs_dquot *pdqp = NULL;
1034 struct xfs_dquot *olddquot = NULL;
1037 trace_xfs_ioctl_setattr(ip);
1039 if (mp->m_flags & XFS_MOUNT_RDONLY)
1041 if (XFS_FORCED_SHUTDOWN(mp))
1045 * Disallow 32bit project ids when projid32bit feature is not enabled.
1047 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
1048 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1052 * If disk quotas is on, we make sure that the dquots do exist on disk,
1053 * before we start any other transactions. Trying to do this later
1054 * is messy. We don't care to take a readlock to look at the ids
1055 * in inode here, because we can't hold it across the trans_reserve.
1056 * If the IDs do change before we take the ilock, we're covered
1057 * because the i_*dquot fields will get updated anyway.
1059 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
1060 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1061 ip->i_d.di_gid, fa->fsx_projid,
1062 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1068 * For the other attributes, we acquire the inode lock and
1069 * first do an error checking pass.
1071 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
1072 code = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
1076 lock_flags = XFS_ILOCK_EXCL;
1077 xfs_ilock(ip, lock_flags);
1080 * CAP_FOWNER overrides the following restrictions:
1082 * The user ID of the calling process must be equal
1083 * to the file owner ID, except in cases where the
1084 * CAP_FSETID capability is applicable.
1086 if (!inode_owner_or_capable(VFS_I(ip))) {
1092 * Do a quota reservation only if projid is actually going to change.
1093 * Only allow changing of projid from init_user_ns since it is a
1094 * non user namespace aware identifier.
1096 if (mask & FSX_PROJID) {
1097 if (current_user_ns() != &init_user_ns) {
1102 if (XFS_IS_QUOTA_RUNNING(mp) &&
1103 XFS_IS_PQUOTA_ON(mp) &&
1104 xfs_get_projid(ip) != fa->fsx_projid) {
1106 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL,
1107 pdqp, capable(CAP_FOWNER) ?
1108 XFS_QMOPT_FORCE_RES : 0);
1109 if (code) /* out of quota */
1114 if (mask & FSX_EXTSIZE) {
1116 * Can't change extent size if any extents are allocated.
1118 if (ip->i_d.di_nextents &&
1119 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
1121 code = -EINVAL; /* EFBIG? */
1126 * Extent size must be a multiple of the appropriate block
1127 * size, if set at all. It must also be smaller than the
1128 * maximum extent size supported by the filesystem.
1130 * Also, for non-realtime files, limit the extent size hint to
1131 * half the size of the AGs in the filesystem so alignment
1132 * doesn't result in extents larger than an AG.
1134 if (fa->fsx_extsize != 0) {
1136 xfs_fsblock_t extsize_fsb;
1138 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1139 if (extsize_fsb > MAXEXTLEN) {
1144 if (XFS_IS_REALTIME_INODE(ip) ||
1145 ((mask & FSX_XFLAGS) &&
1146 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1147 size = mp->m_sb.sb_rextsize <<
1148 mp->m_sb.sb_blocklog;
1150 size = mp->m_sb.sb_blocksize;
1151 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1157 if (fa->fsx_extsize % size) {
1165 if (mask & FSX_XFLAGS) {
1167 * Can't change realtime flag if any extents are allocated.
1169 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1170 (XFS_IS_REALTIME_INODE(ip)) !=
1171 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1172 code = -EINVAL; /* EFBIG? */
1177 * If realtime flag is set then must have realtime data.
1179 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1180 if ((mp->m_sb.sb_rblocks == 0) ||
1181 (mp->m_sb.sb_rextsize == 0) ||
1182 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1189 * Can't modify an immutable/append-only file unless
1190 * we have appropriate permission.
1192 if ((ip->i_d.di_flags &
1193 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1195 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1196 !capable(CAP_LINUX_IMMUTABLE)) {
1202 xfs_trans_ijoin(tp, ip, 0);
1205 * Change file ownership. Must be the owner or privileged.
1207 if (mask & FSX_PROJID) {
1209 * CAP_FSETID overrides the following restrictions:
1211 * The set-user-ID and set-group-ID bits of a file will be
1212 * cleared upon successful return from chown()
1214 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1215 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1216 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1219 * Change the ownerships and register quota modifications
1220 * in the transaction.
1222 if (xfs_get_projid(ip) != fa->fsx_projid) {
1223 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1224 olddquot = xfs_qm_vop_chown(tp, ip,
1225 &ip->i_pdquot, pdqp);
1227 ASSERT(ip->i_d.di_version > 1);
1228 xfs_set_projid(ip, fa->fsx_projid);
1233 if (mask & FSX_XFLAGS) {
1234 xfs_set_diflags(ip, fa->fsx_xflags);
1235 xfs_diflags_to_linux(ip);
1239 * Only set the extent size hint if we've already determined that the
1240 * extent size hint should be set on the inode. If no extent size flags
1241 * are set on the inode then unconditionally clear the extent size hint.
1243 if (mask & FSX_EXTSIZE) {
1246 if (ip->i_d.di_flags &
1247 (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1248 extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1249 ip->i_d.di_extsize = extsize;
1252 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1253 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1255 XFS_STATS_INC(xs_ig_attrchg);
1258 * If this is a synchronous mount, make sure that the
1259 * transaction goes to disk before returning to the user.
1260 * This is slightly sub-optimal in that truncates require
1261 * two sync transactions instead of one for wsync filesystems.
1262 * One for the truncate and one for the timestamps since we
1263 * don't want to change the timestamps unless we're sure the
1264 * truncate worked. Truncates are less than 1% of the laddis
1265 * mix so this probably isn't worth the trouble to optimize.
1267 if (mp->m_flags & XFS_MOUNT_WSYNC)
1268 xfs_trans_set_sync(tp);
1269 code = xfs_trans_commit(tp, 0);
1270 xfs_iunlock(ip, lock_flags);
1273 * Release any dquot(s) the inode had kept before chown.
1275 xfs_qm_dqrele(olddquot);
1276 xfs_qm_dqrele(udqp);
1277 xfs_qm_dqrele(pdqp);
1282 xfs_qm_dqrele(udqp);
1283 xfs_qm_dqrele(pdqp);
1284 xfs_trans_cancel(tp, 0);
1286 xfs_iunlock(ip, lock_flags);
1300 if (copy_from_user(&fa, arg, sizeof(fa)))
1303 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1304 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1305 mask |= FSX_NONBLOCK;
1307 error = mnt_want_write_file(filp);
1310 error = xfs_ioctl_setattr(ip, &fa, mask);
1311 mnt_drop_write_file(filp);
1322 flags = xfs_di2lxflags(ip->i_d.di_flags);
1323 if (copy_to_user(arg, &flags, sizeof(flags)))
1339 if (copy_from_user(&flags, arg, sizeof(flags)))
1342 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1343 FS_NOATIME_FL | FS_NODUMP_FL | \
1348 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1349 mask |= FSX_NONBLOCK;
1350 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1352 error = mnt_want_write_file(filp);
1355 error = xfs_ioctl_setattr(ip, &fa, mask);
1356 mnt_drop_write_file(filp);
1361 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1363 struct getbmap __user *base = (struct getbmap __user *)*ap;
1365 /* copy only getbmap portion (not getbmapx) */
1366 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1369 *ap += sizeof(struct getbmap);
1375 struct xfs_inode *ip,
1380 struct getbmapx bmx;
1383 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1386 if (bmx.bmv_count < 2)
1389 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1390 if (ioflags & XFS_IO_INVIS)
1391 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1393 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1394 (__force struct getbmap *)arg+1);
1398 /* copy back header - only size of getbmap */
1399 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1405 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1407 struct getbmapx __user *base = (struct getbmapx __user *)*ap;
1409 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1412 *ap += sizeof(struct getbmapx);
1418 struct xfs_inode *ip,
1421 struct getbmapx bmx;
1424 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1427 if (bmx.bmv_count < 2)
1430 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1433 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1434 (__force struct getbmapx *)arg+1);
1438 /* copy back header */
1439 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1449 xfs_inode_t *ip, *tip;
1453 /* Pull information for the target fd */
1454 f = fdget((int)sxp->sx_fdtarget);
1460 if (!(f.file->f_mode & FMODE_WRITE) ||
1461 !(f.file->f_mode & FMODE_READ) ||
1462 (f.file->f_flags & O_APPEND)) {
1467 tmp = fdget((int)sxp->sx_fdtmp);
1473 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1474 !(tmp.file->f_mode & FMODE_READ) ||
1475 (tmp.file->f_flags & O_APPEND)) {
1477 goto out_put_tmp_file;
1480 if (IS_SWAPFILE(file_inode(f.file)) ||
1481 IS_SWAPFILE(file_inode(tmp.file))) {
1483 goto out_put_tmp_file;
1486 ip = XFS_I(file_inode(f.file));
1487 tip = XFS_I(file_inode(tmp.file));
1489 if (ip->i_mount != tip->i_mount) {
1491 goto out_put_tmp_file;
1494 if (ip->i_ino == tip->i_ino) {
1496 goto out_put_tmp_file;
1499 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1501 goto out_put_tmp_file;
1504 error = xfs_swap_extents(ip, tip, sxp);
1515 * Note: some of the ioctl's return positive numbers as a
1516 * byte count indicating success, such as readlink_by_handle.
1517 * So we don't "sign flip" like most other routines. This means
1518 * true errors need to be returned as a negative value.
1526 struct inode *inode = file_inode(filp);
1527 struct xfs_inode *ip = XFS_I(inode);
1528 struct xfs_mount *mp = ip->i_mount;
1529 void __user *arg = (void __user *)p;
1533 if (filp->f_mode & FMODE_NOCMTIME)
1534 ioflags |= XFS_IO_INVIS;
1536 trace_xfs_file_ioctl(ip);
1540 return xfs_ioc_trim(mp, arg);
1541 case XFS_IOC_ALLOCSP:
1542 case XFS_IOC_FREESP:
1543 case XFS_IOC_RESVSP:
1544 case XFS_IOC_UNRESVSP:
1545 case XFS_IOC_ALLOCSP64:
1546 case XFS_IOC_FREESP64:
1547 case XFS_IOC_RESVSP64:
1548 case XFS_IOC_UNRESVSP64:
1549 case XFS_IOC_ZERO_RANGE: {
1552 if (copy_from_user(&bf, arg, sizeof(bf)))
1554 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1556 case XFS_IOC_DIOINFO: {
1558 xfs_buftarg_t *target =
1559 XFS_IS_REALTIME_INODE(ip) ?
1560 mp->m_rtdev_targp : mp->m_ddev_targp;
1562 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1563 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1565 if (copy_to_user(arg, &da, sizeof(da)))
1570 case XFS_IOC_FSBULKSTAT_SINGLE:
1571 case XFS_IOC_FSBULKSTAT:
1572 case XFS_IOC_FSINUMBERS:
1573 return xfs_ioc_bulkstat(mp, cmd, arg);
1575 case XFS_IOC_FSGEOMETRY_V1:
1576 return xfs_ioc_fsgeometry_v1(mp, arg);
1578 case XFS_IOC_FSGEOMETRY:
1579 return xfs_ioc_fsgeometry(mp, arg);
1581 case XFS_IOC_GETVERSION:
1582 return put_user(inode->i_generation, (int __user *)arg);
1584 case XFS_IOC_FSGETXATTR:
1585 return xfs_ioc_fsgetxattr(ip, 0, arg);
1586 case XFS_IOC_FSGETXATTRA:
1587 return xfs_ioc_fsgetxattr(ip, 1, arg);
1588 case XFS_IOC_FSSETXATTR:
1589 return xfs_ioc_fssetxattr(ip, filp, arg);
1590 case XFS_IOC_GETXFLAGS:
1591 return xfs_ioc_getxflags(ip, arg);
1592 case XFS_IOC_SETXFLAGS:
1593 return xfs_ioc_setxflags(ip, filp, arg);
1595 case XFS_IOC_FSSETDM: {
1596 struct fsdmidata dmi;
1598 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1601 error = mnt_want_write_file(filp);
1605 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1607 mnt_drop_write_file(filp);
1611 case XFS_IOC_GETBMAP:
1612 case XFS_IOC_GETBMAPA:
1613 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1615 case XFS_IOC_GETBMAPX:
1616 return xfs_ioc_getbmapx(ip, arg);
1618 case XFS_IOC_FD_TO_HANDLE:
1619 case XFS_IOC_PATH_TO_HANDLE:
1620 case XFS_IOC_PATH_TO_FSHANDLE: {
1621 xfs_fsop_handlereq_t hreq;
1623 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1625 return xfs_find_handle(cmd, &hreq);
1627 case XFS_IOC_OPEN_BY_HANDLE: {
1628 xfs_fsop_handlereq_t hreq;
1630 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1632 return xfs_open_by_handle(filp, &hreq);
1634 case XFS_IOC_FSSETDM_BY_HANDLE:
1635 return xfs_fssetdm_by_handle(filp, arg);
1637 case XFS_IOC_READLINK_BY_HANDLE: {
1638 xfs_fsop_handlereq_t hreq;
1640 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1642 return xfs_readlink_by_handle(filp, &hreq);
1644 case XFS_IOC_ATTRLIST_BY_HANDLE:
1645 return xfs_attrlist_by_handle(filp, arg);
1647 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1648 return xfs_attrmulti_by_handle(filp, arg);
1650 case XFS_IOC_SWAPEXT: {
1651 struct xfs_swapext sxp;
1653 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1655 error = mnt_want_write_file(filp);
1658 error = xfs_ioc_swapext(&sxp);
1659 mnt_drop_write_file(filp);
1663 case XFS_IOC_FSCOUNTS: {
1664 xfs_fsop_counts_t out;
1666 error = xfs_fs_counts(mp, &out);
1670 if (copy_to_user(arg, &out, sizeof(out)))
1675 case XFS_IOC_SET_RESBLKS: {
1676 xfs_fsop_resblks_t inout;
1679 if (!capable(CAP_SYS_ADMIN))
1682 if (mp->m_flags & XFS_MOUNT_RDONLY)
1685 if (copy_from_user(&inout, arg, sizeof(inout)))
1688 error = mnt_want_write_file(filp);
1692 /* input parameter is passed in resblks field of structure */
1694 error = xfs_reserve_blocks(mp, &in, &inout);
1695 mnt_drop_write_file(filp);
1699 if (copy_to_user(arg, &inout, sizeof(inout)))
1704 case XFS_IOC_GET_RESBLKS: {
1705 xfs_fsop_resblks_t out;
1707 if (!capable(CAP_SYS_ADMIN))
1710 error = xfs_reserve_blocks(mp, NULL, &out);
1714 if (copy_to_user(arg, &out, sizeof(out)))
1720 case XFS_IOC_FSGROWFSDATA: {
1721 xfs_growfs_data_t in;
1723 if (copy_from_user(&in, arg, sizeof(in)))
1726 error = mnt_want_write_file(filp);
1729 error = xfs_growfs_data(mp, &in);
1730 mnt_drop_write_file(filp);
1734 case XFS_IOC_FSGROWFSLOG: {
1735 xfs_growfs_log_t in;
1737 if (copy_from_user(&in, arg, sizeof(in)))
1740 error = mnt_want_write_file(filp);
1743 error = xfs_growfs_log(mp, &in);
1744 mnt_drop_write_file(filp);
1748 case XFS_IOC_FSGROWFSRT: {
1751 if (copy_from_user(&in, arg, sizeof(in)))
1754 error = mnt_want_write_file(filp);
1757 error = xfs_growfs_rt(mp, &in);
1758 mnt_drop_write_file(filp);
1762 case XFS_IOC_GOINGDOWN: {
1765 if (!capable(CAP_SYS_ADMIN))
1768 if (get_user(in, (__uint32_t __user *)arg))
1771 return xfs_fs_goingdown(mp, in);
1774 case XFS_IOC_ERROR_INJECTION: {
1775 xfs_error_injection_t in;
1777 if (!capable(CAP_SYS_ADMIN))
1780 if (copy_from_user(&in, arg, sizeof(in)))
1783 return xfs_errortag_add(in.errtag, mp);
1786 case XFS_IOC_ERROR_CLEARALL:
1787 if (!capable(CAP_SYS_ADMIN))
1790 return xfs_errortag_clearall(mp, 1);
1792 case XFS_IOC_FREE_EOFBLOCKS: {
1793 struct xfs_fs_eofblocks eofb;
1794 struct xfs_eofblocks keofb;
1796 if (!capable(CAP_SYS_ADMIN))
1799 if (mp->m_flags & XFS_MOUNT_RDONLY)
1802 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1805 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1809 return xfs_icache_free_eofblocks(mp, &keofb);