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"
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 = d_inode(path.dentry);
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 = d_inode(dentry);
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 (!d_is_symlink(dentry)) {
296 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
301 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
307 error = xfs_readlink(XFS_I(d_inode(dentry)), 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);
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);
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(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
385 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
390 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), 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 > XFS_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(d_inode(dentry)), 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 > XFS_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,
488 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
490 if (len > XFS_XATTR_SIZE_MAX)
493 kbuf = memdup_user(ubuf, len);
495 return PTR_ERR(kbuf);
497 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
499 xfs_forget_acl(inode, name, flags);
505 xfs_attrmulti_attr_remove(
512 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
514 error = xfs_attr_remove(XFS_I(inode), name, flags);
516 xfs_forget_acl(inode, name, flags);
521 xfs_attrmulti_by_handle(
522 struct file *parfilp,
526 xfs_attr_multiop_t *ops;
527 xfs_fsop_attrmulti_handlereq_t am_hreq;
528 struct dentry *dentry;
529 unsigned int i, size;
530 unsigned char *attr_name;
532 if (!capable(CAP_SYS_ADMIN))
534 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
538 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
541 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
543 return PTR_ERR(dentry);
546 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
547 if (!size || size > 16 * PAGE_SIZE)
550 ops = memdup_user(am_hreq.ops, size);
552 error = PTR_ERR(ops);
557 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
562 for (i = 0; i < am_hreq.opcount; i++) {
563 ops[i].am_error = strncpy_from_user((char *)attr_name,
564 ops[i].am_attrname, MAXNAMELEN);
565 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
567 if (ops[i].am_error < 0)
570 switch (ops[i].am_opcode) {
572 ops[i].am_error = xfs_attrmulti_attr_get(
573 d_inode(dentry), attr_name,
574 ops[i].am_attrvalue, &ops[i].am_length,
578 ops[i].am_error = mnt_want_write_file(parfilp);
581 ops[i].am_error = xfs_attrmulti_attr_set(
582 d_inode(dentry), attr_name,
583 ops[i].am_attrvalue, ops[i].am_length,
585 mnt_drop_write_file(parfilp);
588 ops[i].am_error = mnt_want_write_file(parfilp);
591 ops[i].am_error = xfs_attrmulti_attr_remove(
592 d_inode(dentry), attr_name,
594 mnt_drop_write_file(parfilp);
597 ops[i].am_error = -EINVAL;
601 if (copy_to_user(am_hreq.ops, ops, size))
614 struct xfs_inode *ip,
622 enum xfs_prealloc_flags flags = 0;
623 uint iolock = XFS_IOLOCK_EXCL;
627 * Only allow the sys admin to reserve space unless
628 * unwritten extents are enabled.
630 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
631 !capable(CAP_SYS_ADMIN))
634 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
637 if (!(filp->f_mode & FMODE_WRITE))
640 if (!S_ISREG(inode->i_mode))
643 if (filp->f_flags & O_DSYNC)
644 flags |= XFS_PREALLOC_SYNC;
645 if (ioflags & XFS_IO_INVIS)
646 flags |= XFS_PREALLOC_INVISIBLE;
648 error = mnt_want_write_file(filp);
652 xfs_ilock(ip, iolock);
653 error = xfs_break_layouts(inode, &iolock, false);
657 xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
658 iolock |= XFS_MMAPLOCK_EXCL;
660 switch (bf->l_whence) {
664 bf->l_start += filp->f_pos;
667 bf->l_start += XFS_ISIZE(ip);
675 * length of <= 0 for resv/unresv/zero is invalid. length for
676 * alloc/free is ignored completely and we have no idea what userspace
677 * might have set it to, so set it to zero to allow range
681 case XFS_IOC_ZERO_RANGE:
683 case XFS_IOC_RESVSP64:
684 case XFS_IOC_UNRESVSP:
685 case XFS_IOC_UNRESVSP64:
686 if (bf->l_len <= 0) {
696 if (bf->l_start < 0 ||
697 bf->l_start > inode->i_sb->s_maxbytes ||
698 bf->l_start + bf->l_len < 0 ||
699 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
705 case XFS_IOC_ZERO_RANGE:
706 flags |= XFS_PREALLOC_SET;
707 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
710 case XFS_IOC_RESVSP64:
711 flags |= XFS_PREALLOC_SET;
712 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
715 case XFS_IOC_UNRESVSP:
716 case XFS_IOC_UNRESVSP64:
717 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
719 case XFS_IOC_ALLOCSP:
720 case XFS_IOC_ALLOCSP64:
722 case XFS_IOC_FREESP64:
723 flags |= XFS_PREALLOC_CLEAR;
724 if (bf->l_start > XFS_ISIZE(ip)) {
725 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
726 bf->l_start - XFS_ISIZE(ip), 0);
731 iattr.ia_valid = ATTR_SIZE;
732 iattr.ia_size = bf->l_start;
734 error = xfs_setattr_size(ip, &iattr);
744 error = xfs_update_prealloc_flags(ip, flags);
747 xfs_iunlock(ip, iolock);
748 mnt_drop_write_file(filp);
758 xfs_fsop_bulkreq_t bulkreq;
759 int count; /* # of records returned */
760 xfs_ino_t inlast; /* last inode number */
764 /* done = 1 if there are more stats to get and if bulkstat */
765 /* should be called again (unused here, but used in dmapi) */
767 if (!capable(CAP_SYS_ADMIN))
770 if (XFS_FORCED_SHUTDOWN(mp))
773 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
776 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
779 if ((count = bulkreq.icount) <= 0)
782 if (bulkreq.ubuffer == NULL)
785 if (cmd == XFS_IOC_FSINUMBERS)
786 error = xfs_inumbers(mp, &inlast, &count,
787 bulkreq.ubuffer, xfs_inumbers_fmt);
788 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
789 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
790 sizeof(xfs_bstat_t), NULL, &done);
791 else /* XFS_IOC_FSBULKSTAT */
792 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
793 sizeof(xfs_bstat_t), bulkreq.ubuffer,
799 if (bulkreq.ocount != NULL) {
800 if (copy_to_user(bulkreq.lastip, &inlast,
804 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
812 xfs_ioc_fsgeometry_v1(
816 xfs_fsop_geom_t fsgeo;
819 error = xfs_fs_geometry(mp, &fsgeo, 3);
824 * Caller should have passed an argument of type
825 * xfs_fsop_geom_v1_t. This is a proper subset of the
826 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
828 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
838 xfs_fsop_geom_t fsgeo;
841 error = xfs_fs_geometry(mp, &fsgeo, 4);
845 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
851 * Linux extended inode flags interface.
855 xfs_merge_ioc_xflags(
859 unsigned int xflags = start;
861 if (flags & FS_IMMUTABLE_FL)
862 xflags |= FS_XFLAG_IMMUTABLE;
864 xflags &= ~FS_XFLAG_IMMUTABLE;
865 if (flags & FS_APPEND_FL)
866 xflags |= FS_XFLAG_APPEND;
868 xflags &= ~FS_XFLAG_APPEND;
869 if (flags & FS_SYNC_FL)
870 xflags |= FS_XFLAG_SYNC;
872 xflags &= ~FS_XFLAG_SYNC;
873 if (flags & FS_NOATIME_FL)
874 xflags |= FS_XFLAG_NOATIME;
876 xflags &= ~FS_XFLAG_NOATIME;
877 if (flags & FS_NODUMP_FL)
878 xflags |= FS_XFLAG_NODUMP;
880 xflags &= ~FS_XFLAG_NODUMP;
889 unsigned int flags = 0;
891 if (di_flags & XFS_DIFLAG_IMMUTABLE)
892 flags |= FS_IMMUTABLE_FL;
893 if (di_flags & XFS_DIFLAG_APPEND)
894 flags |= FS_APPEND_FL;
895 if (di_flags & XFS_DIFLAG_SYNC)
897 if (di_flags & XFS_DIFLAG_NOATIME)
898 flags |= FS_NOATIME_FL;
899 if (di_flags & XFS_DIFLAG_NODUMP)
900 flags |= FS_NODUMP_FL;
912 memset(&fa, 0, sizeof(struct fsxattr));
914 xfs_ilock(ip, XFS_ILOCK_SHARED);
915 fa.fsx_xflags = xfs_ip2xflags(ip);
916 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
917 fa.fsx_projid = xfs_get_projid(ip);
921 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
922 fa.fsx_nextents = ip->i_afp->if_bytes /
923 sizeof(xfs_bmbt_rec_t);
925 fa.fsx_nextents = ip->i_d.di_anextents;
929 if (ip->i_df.if_flags & XFS_IFEXTENTS)
930 fa.fsx_nextents = ip->i_df.if_bytes /
931 sizeof(xfs_bmbt_rec_t);
933 fa.fsx_nextents = ip->i_d.di_nextents;
935 xfs_iunlock(ip, XFS_ILOCK_SHARED);
937 if (copy_to_user(arg, &fa, sizeof(fa)))
944 struct xfs_inode *ip,
947 unsigned int di_flags;
950 /* can't set PREALLOC this way, just preserve it */
951 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
952 if (xflags & FS_XFLAG_IMMUTABLE)
953 di_flags |= XFS_DIFLAG_IMMUTABLE;
954 if (xflags & FS_XFLAG_APPEND)
955 di_flags |= XFS_DIFLAG_APPEND;
956 if (xflags & FS_XFLAG_SYNC)
957 di_flags |= XFS_DIFLAG_SYNC;
958 if (xflags & FS_XFLAG_NOATIME)
959 di_flags |= XFS_DIFLAG_NOATIME;
960 if (xflags & FS_XFLAG_NODUMP)
961 di_flags |= XFS_DIFLAG_NODUMP;
962 if (xflags & FS_XFLAG_NODEFRAG)
963 di_flags |= XFS_DIFLAG_NODEFRAG;
964 if (xflags & FS_XFLAG_FILESTREAM)
965 di_flags |= XFS_DIFLAG_FILESTREAM;
966 if (S_ISDIR(ip->i_d.di_mode)) {
967 if (xflags & FS_XFLAG_RTINHERIT)
968 di_flags |= XFS_DIFLAG_RTINHERIT;
969 if (xflags & FS_XFLAG_NOSYMLINKS)
970 di_flags |= XFS_DIFLAG_NOSYMLINKS;
971 if (xflags & FS_XFLAG_EXTSZINHERIT)
972 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
973 if (xflags & FS_XFLAG_PROJINHERIT)
974 di_flags |= XFS_DIFLAG_PROJINHERIT;
975 } else if (S_ISREG(ip->i_d.di_mode)) {
976 if (xflags & FS_XFLAG_REALTIME)
977 di_flags |= XFS_DIFLAG_REALTIME;
978 if (xflags & FS_XFLAG_EXTSIZE)
979 di_flags |= XFS_DIFLAG_EXTSIZE;
981 ip->i_d.di_flags = di_flags;
983 /* diflags2 only valid for v3 inodes. */
984 if (ip->i_d.di_version < 3)
988 if (xflags & FS_XFLAG_DAX)
989 di_flags2 |= XFS_DIFLAG2_DAX;
991 ip->i_d.di_flags2 = di_flags2;
996 xfs_diflags_to_linux(
997 struct xfs_inode *ip)
999 struct inode *inode = VFS_I(ip);
1000 unsigned int xflags = xfs_ip2xflags(ip);
1002 if (xflags & FS_XFLAG_IMMUTABLE)
1003 inode->i_flags |= S_IMMUTABLE;
1005 inode->i_flags &= ~S_IMMUTABLE;
1006 if (xflags & FS_XFLAG_APPEND)
1007 inode->i_flags |= S_APPEND;
1009 inode->i_flags &= ~S_APPEND;
1010 if (xflags & FS_XFLAG_SYNC)
1011 inode->i_flags |= S_SYNC;
1013 inode->i_flags &= ~S_SYNC;
1014 if (xflags & FS_XFLAG_NOATIME)
1015 inode->i_flags |= S_NOATIME;
1017 inode->i_flags &= ~S_NOATIME;
1018 if (xflags & FS_XFLAG_DAX)
1019 inode->i_flags |= S_DAX;
1021 inode->i_flags &= ~S_DAX;
1026 xfs_ioctl_setattr_xflags(
1027 struct xfs_trans *tp,
1028 struct xfs_inode *ip,
1031 struct xfs_mount *mp = ip->i_mount;
1033 /* Can't change realtime flag if any extents are allocated. */
1034 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1035 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1038 /* If realtime flag is set then must have realtime device */
1039 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1040 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1041 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1046 * Can't modify an immutable/append-only file unless
1047 * we have appropriate permission.
1049 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1050 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
1051 !capable(CAP_LINUX_IMMUTABLE))
1054 xfs_set_diflags(ip, fa->fsx_xflags);
1055 xfs_diflags_to_linux(ip);
1056 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1057 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1058 XFS_STATS_INC(mp, xs_ig_attrchg);
1063 * Set up the transaction structure for the setattr operation, checking that we
1064 * have permission to do so. On success, return a clean transaction and the
1065 * inode locked exclusively ready for further operation specific checks. On
1066 * failure, return an error without modifying or locking the inode.
1068 static struct xfs_trans *
1069 xfs_ioctl_setattr_get_trans(
1070 struct xfs_inode *ip)
1072 struct xfs_mount *mp = ip->i_mount;
1073 struct xfs_trans *tp;
1076 if (mp->m_flags & XFS_MOUNT_RDONLY)
1077 return ERR_PTR(-EROFS);
1078 if (XFS_FORCED_SHUTDOWN(mp))
1079 return ERR_PTR(-EIO);
1081 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
1082 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
1086 xfs_ilock(ip, XFS_ILOCK_EXCL);
1087 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1090 * CAP_FOWNER overrides the following restrictions:
1092 * The user ID of the calling process must be equal to the file owner
1093 * ID, except in cases where the CAP_FSETID capability is applicable.
1095 if (!inode_owner_or_capable(VFS_I(ip))) {
1100 if (mp->m_flags & XFS_MOUNT_WSYNC)
1101 xfs_trans_set_sync(tp);
1106 xfs_trans_cancel(tp);
1107 return ERR_PTR(error);
1111 * extent size hint validation is somewhat cumbersome. Rules are:
1113 * 1. extent size hint is only valid for directories and regular files
1114 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1115 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1116 * 4. can only be changed on regular files if no extents are allocated
1117 * 5. can be changed on directories at any time
1118 * 6. extsize hint of 0 turns off hints, clears inode flags.
1119 * 7. Extent size must be a multiple of the appropriate block size.
1120 * 8. for non-realtime files, the extent size hint must be limited
1121 * to half the AG size to avoid alignment extending the extent beyond the
1125 xfs_ioctl_setattr_check_extsize(
1126 struct xfs_inode *ip,
1129 struct xfs_mount *mp = ip->i_mount;
1131 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(ip->i_d.di_mode))
1134 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
1135 !S_ISDIR(ip->i_d.di_mode))
1138 if (S_ISREG(ip->i_d.di_mode) && ip->i_d.di_nextents &&
1139 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1142 if (fa->fsx_extsize != 0) {
1144 xfs_fsblock_t extsize_fsb;
1146 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1147 if (extsize_fsb > MAXEXTLEN)
1150 if (XFS_IS_REALTIME_INODE(ip) ||
1151 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1152 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1154 size = mp->m_sb.sb_blocksize;
1155 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1159 if (fa->fsx_extsize % size)
1162 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
1168 xfs_ioctl_setattr_check_projid(
1169 struct xfs_inode *ip,
1172 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1173 if (fa->fsx_projid > (__uint16_t)-1 &&
1174 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1178 * Project Quota ID state is only allowed to change from within the init
1179 * namespace. Enforce that restriction only if we are trying to change
1180 * the quota ID state. Everything else is allowed in user namespaces.
1182 if (current_user_ns() == &init_user_ns)
1185 if (xfs_get_projid(ip) != fa->fsx_projid)
1187 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
1188 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1199 struct xfs_mount *mp = ip->i_mount;
1200 struct xfs_trans *tp;
1201 struct xfs_dquot *udqp = NULL;
1202 struct xfs_dquot *pdqp = NULL;
1203 struct xfs_dquot *olddquot = NULL;
1206 trace_xfs_ioctl_setattr(ip);
1208 code = xfs_ioctl_setattr_check_projid(ip, fa);
1213 * If disk quotas is on, we make sure that the dquots do exist on disk,
1214 * before we start any other transactions. Trying to do this later
1215 * is messy. We don't care to take a readlock to look at the ids
1216 * in inode here, because we can't hold it across the trans_reserve.
1217 * If the IDs do change before we take the ilock, we're covered
1218 * because the i_*dquot fields will get updated anyway.
1220 if (XFS_IS_QUOTA_ON(mp)) {
1221 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1222 ip->i_d.di_gid, fa->fsx_projid,
1223 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1228 tp = xfs_ioctl_setattr_get_trans(ip);
1231 goto error_free_dquots;
1235 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1236 xfs_get_projid(ip) != fa->fsx_projid) {
1237 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1238 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1239 if (code) /* out of quota */
1240 goto error_trans_cancel;
1243 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1245 goto error_trans_cancel;
1247 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1249 goto error_trans_cancel;
1252 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1253 * overrides the following restrictions:
1255 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1256 * successful return from chown()
1259 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1260 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1261 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1263 /* Change the ownerships and register project quota modifications */
1264 if (xfs_get_projid(ip) != fa->fsx_projid) {
1265 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1266 olddquot = xfs_qm_vop_chown(tp, ip,
1267 &ip->i_pdquot, pdqp);
1269 ASSERT(ip->i_d.di_version > 1);
1270 xfs_set_projid(ip, fa->fsx_projid);
1274 * Only set the extent size hint if we've already determined that the
1275 * extent size hint should be set on the inode. If no extent size flags
1276 * are set on the inode then unconditionally clear the extent size hint.
1278 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1279 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1281 ip->i_d.di_extsize = 0;
1283 code = xfs_trans_commit(tp);
1286 * Release any dquot(s) the inode had kept before chown.
1288 xfs_qm_dqrele(olddquot);
1289 xfs_qm_dqrele(udqp);
1290 xfs_qm_dqrele(pdqp);
1295 xfs_trans_cancel(tp);
1297 xfs_qm_dqrele(udqp);
1298 xfs_qm_dqrele(pdqp);
1311 if (copy_from_user(&fa, arg, sizeof(fa)))
1314 error = mnt_want_write_file(filp);
1317 error = xfs_ioctl_setattr(ip, &fa);
1318 mnt_drop_write_file(filp);
1329 flags = xfs_di2lxflags(ip->i_d.di_flags);
1330 if (copy_to_user(arg, &flags, sizeof(flags)))
1337 struct xfs_inode *ip,
1341 struct xfs_trans *tp;
1346 if (copy_from_user(&flags, arg, sizeof(flags)))
1349 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1350 FS_NOATIME_FL | FS_NODUMP_FL | \
1354 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1356 error = mnt_want_write_file(filp);
1360 tp = xfs_ioctl_setattr_get_trans(ip);
1362 error = PTR_ERR(tp);
1363 goto out_drop_write;
1366 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1368 xfs_trans_cancel(tp);
1369 goto out_drop_write;
1372 error = xfs_trans_commit(tp);
1374 mnt_drop_write_file(filp);
1379 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1381 struct getbmap __user *base = (struct getbmap __user *)*ap;
1383 /* copy only getbmap portion (not getbmapx) */
1384 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1387 *ap += sizeof(struct getbmap);
1393 struct xfs_inode *ip,
1398 struct getbmapx bmx;
1401 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1404 if (bmx.bmv_count < 2)
1407 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1408 if (ioflags & XFS_IO_INVIS)
1409 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1411 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1412 (__force struct getbmap *)arg+1);
1416 /* copy back header - only size of getbmap */
1417 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1423 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1425 struct getbmapx __user *base = (struct getbmapx __user *)*ap;
1427 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1430 *ap += sizeof(struct getbmapx);
1436 struct xfs_inode *ip,
1439 struct getbmapx bmx;
1442 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1445 if (bmx.bmv_count < 2)
1448 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1451 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1452 (__force struct getbmapx *)arg+1);
1456 /* copy back header */
1457 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1467 xfs_inode_t *ip, *tip;
1471 /* Pull information for the target fd */
1472 f = fdget((int)sxp->sx_fdtarget);
1478 if (!(f.file->f_mode & FMODE_WRITE) ||
1479 !(f.file->f_mode & FMODE_READ) ||
1480 (f.file->f_flags & O_APPEND)) {
1485 tmp = fdget((int)sxp->sx_fdtmp);
1491 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1492 !(tmp.file->f_mode & FMODE_READ) ||
1493 (tmp.file->f_flags & O_APPEND)) {
1495 goto out_put_tmp_file;
1498 if (IS_SWAPFILE(file_inode(f.file)) ||
1499 IS_SWAPFILE(file_inode(tmp.file))) {
1501 goto out_put_tmp_file;
1504 ip = XFS_I(file_inode(f.file));
1505 tip = XFS_I(file_inode(tmp.file));
1507 if (ip->i_mount != tip->i_mount) {
1509 goto out_put_tmp_file;
1512 if (ip->i_ino == tip->i_ino) {
1514 goto out_put_tmp_file;
1517 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1519 goto out_put_tmp_file;
1522 error = xfs_swap_extents(ip, tip, sxp);
1533 * Note: some of the ioctl's return positive numbers as a
1534 * byte count indicating success, such as readlink_by_handle.
1535 * So we don't "sign flip" like most other routines. This means
1536 * true errors need to be returned as a negative value.
1544 struct inode *inode = file_inode(filp);
1545 struct xfs_inode *ip = XFS_I(inode);
1546 struct xfs_mount *mp = ip->i_mount;
1547 void __user *arg = (void __user *)p;
1551 if (filp->f_mode & FMODE_NOCMTIME)
1552 ioflags |= XFS_IO_INVIS;
1554 trace_xfs_file_ioctl(ip);
1558 return xfs_ioc_trim(mp, arg);
1559 case XFS_IOC_ALLOCSP:
1560 case XFS_IOC_FREESP:
1561 case XFS_IOC_RESVSP:
1562 case XFS_IOC_UNRESVSP:
1563 case XFS_IOC_ALLOCSP64:
1564 case XFS_IOC_FREESP64:
1565 case XFS_IOC_RESVSP64:
1566 case XFS_IOC_UNRESVSP64:
1567 case XFS_IOC_ZERO_RANGE: {
1570 if (copy_from_user(&bf, arg, sizeof(bf)))
1572 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1574 case XFS_IOC_DIOINFO: {
1576 xfs_buftarg_t *target =
1577 XFS_IS_REALTIME_INODE(ip) ?
1578 mp->m_rtdev_targp : mp->m_ddev_targp;
1580 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1581 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1583 if (copy_to_user(arg, &da, sizeof(da)))
1588 case XFS_IOC_FSBULKSTAT_SINGLE:
1589 case XFS_IOC_FSBULKSTAT:
1590 case XFS_IOC_FSINUMBERS:
1591 return xfs_ioc_bulkstat(mp, cmd, arg);
1593 case XFS_IOC_FSGEOMETRY_V1:
1594 return xfs_ioc_fsgeometry_v1(mp, arg);
1596 case XFS_IOC_FSGEOMETRY:
1597 return xfs_ioc_fsgeometry(mp, arg);
1599 case XFS_IOC_GETVERSION:
1600 return put_user(inode->i_generation, (int __user *)arg);
1602 case XFS_IOC_FSGETXATTR:
1603 return xfs_ioc_fsgetxattr(ip, 0, arg);
1604 case XFS_IOC_FSGETXATTRA:
1605 return xfs_ioc_fsgetxattr(ip, 1, arg);
1606 case XFS_IOC_FSSETXATTR:
1607 return xfs_ioc_fssetxattr(ip, filp, arg);
1608 case XFS_IOC_GETXFLAGS:
1609 return xfs_ioc_getxflags(ip, arg);
1610 case XFS_IOC_SETXFLAGS:
1611 return xfs_ioc_setxflags(ip, filp, arg);
1613 case XFS_IOC_FSSETDM: {
1614 struct fsdmidata dmi;
1616 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1619 error = mnt_want_write_file(filp);
1623 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1625 mnt_drop_write_file(filp);
1629 case XFS_IOC_GETBMAP:
1630 case XFS_IOC_GETBMAPA:
1631 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1633 case XFS_IOC_GETBMAPX:
1634 return xfs_ioc_getbmapx(ip, arg);
1636 case XFS_IOC_FD_TO_HANDLE:
1637 case XFS_IOC_PATH_TO_HANDLE:
1638 case XFS_IOC_PATH_TO_FSHANDLE: {
1639 xfs_fsop_handlereq_t hreq;
1641 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1643 return xfs_find_handle(cmd, &hreq);
1645 case XFS_IOC_OPEN_BY_HANDLE: {
1646 xfs_fsop_handlereq_t hreq;
1648 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1650 return xfs_open_by_handle(filp, &hreq);
1652 case XFS_IOC_FSSETDM_BY_HANDLE:
1653 return xfs_fssetdm_by_handle(filp, arg);
1655 case XFS_IOC_READLINK_BY_HANDLE: {
1656 xfs_fsop_handlereq_t hreq;
1658 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1660 return xfs_readlink_by_handle(filp, &hreq);
1662 case XFS_IOC_ATTRLIST_BY_HANDLE:
1663 return xfs_attrlist_by_handle(filp, arg);
1665 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1666 return xfs_attrmulti_by_handle(filp, arg);
1668 case XFS_IOC_SWAPEXT: {
1669 struct xfs_swapext sxp;
1671 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1673 error = mnt_want_write_file(filp);
1676 error = xfs_ioc_swapext(&sxp);
1677 mnt_drop_write_file(filp);
1681 case XFS_IOC_FSCOUNTS: {
1682 xfs_fsop_counts_t out;
1684 error = xfs_fs_counts(mp, &out);
1688 if (copy_to_user(arg, &out, sizeof(out)))
1693 case XFS_IOC_SET_RESBLKS: {
1694 xfs_fsop_resblks_t inout;
1697 if (!capable(CAP_SYS_ADMIN))
1700 if (mp->m_flags & XFS_MOUNT_RDONLY)
1703 if (copy_from_user(&inout, arg, sizeof(inout)))
1706 error = mnt_want_write_file(filp);
1710 /* input parameter is passed in resblks field of structure */
1712 error = xfs_reserve_blocks(mp, &in, &inout);
1713 mnt_drop_write_file(filp);
1717 if (copy_to_user(arg, &inout, sizeof(inout)))
1722 case XFS_IOC_GET_RESBLKS: {
1723 xfs_fsop_resblks_t out;
1725 if (!capable(CAP_SYS_ADMIN))
1728 error = xfs_reserve_blocks(mp, NULL, &out);
1732 if (copy_to_user(arg, &out, sizeof(out)))
1738 case XFS_IOC_FSGROWFSDATA: {
1739 xfs_growfs_data_t in;
1741 if (copy_from_user(&in, arg, sizeof(in)))
1744 error = mnt_want_write_file(filp);
1747 error = xfs_growfs_data(mp, &in);
1748 mnt_drop_write_file(filp);
1752 case XFS_IOC_FSGROWFSLOG: {
1753 xfs_growfs_log_t in;
1755 if (copy_from_user(&in, arg, sizeof(in)))
1758 error = mnt_want_write_file(filp);
1761 error = xfs_growfs_log(mp, &in);
1762 mnt_drop_write_file(filp);
1766 case XFS_IOC_FSGROWFSRT: {
1769 if (copy_from_user(&in, arg, sizeof(in)))
1772 error = mnt_want_write_file(filp);
1775 error = xfs_growfs_rt(mp, &in);
1776 mnt_drop_write_file(filp);
1780 case XFS_IOC_GOINGDOWN: {
1783 if (!capable(CAP_SYS_ADMIN))
1786 if (get_user(in, (__uint32_t __user *)arg))
1789 return xfs_fs_goingdown(mp, in);
1792 case XFS_IOC_ERROR_INJECTION: {
1793 xfs_error_injection_t in;
1795 if (!capable(CAP_SYS_ADMIN))
1798 if (copy_from_user(&in, arg, sizeof(in)))
1801 return xfs_errortag_add(in.errtag, mp);
1804 case XFS_IOC_ERROR_CLEARALL:
1805 if (!capable(CAP_SYS_ADMIN))
1808 return xfs_errortag_clearall(mp, 1);
1810 case XFS_IOC_FREE_EOFBLOCKS: {
1811 struct xfs_fs_eofblocks eofb;
1812 struct xfs_eofblocks keofb;
1814 if (!capable(CAP_SYS_ADMIN))
1817 if (mp->m_flags & XFS_MOUNT_RDONLY)
1820 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1823 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1827 return xfs_icache_free_eofblocks(mp, &keofb);