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"
43 #include <linux/capability.h>
44 #include <linux/dcache.h>
45 #include <linux/mount.h>
46 #include <linux/namei.h>
47 #include <linux/pagemap.h>
48 #include <linux/slab.h>
49 #include <linux/exportfs.h>
52 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
53 * a file or fs handle.
55 * XFS_IOC_PATH_TO_FSHANDLE
56 * returns fs handle for a mount point or path within that mount point
57 * XFS_IOC_FD_TO_HANDLE
58 * returns full handle for a FD opened in user space
59 * XFS_IOC_PATH_TO_HANDLE
60 * returns full handle for a path
65 xfs_fsop_handlereq_t *hreq)
75 if (cmd == XFS_IOC_FD_TO_HANDLE) {
79 inode = file_inode(f.file);
81 error = user_lpath((const char __user *)hreq->path, &path);
84 inode = path.dentry->d_inode;
89 * We can only generate handles for inodes residing on a XFS filesystem,
90 * and only for regular files, directories or symbolic links.
93 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
97 if (!S_ISREG(inode->i_mode) &&
98 !S_ISDIR(inode->i_mode) &&
99 !S_ISLNK(inode->i_mode))
103 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
105 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
107 * This handle only contains an fsid, zero the rest.
109 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
110 hsize = sizeof(xfs_fsid_t);
112 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
113 sizeof(handle.ha_fid.fid_len);
114 handle.ha_fid.fid_pad = 0;
115 handle.ha_fid.fid_gen = ip->i_d.di_gen;
116 handle.ha_fid.fid_ino = ip->i_ino;
118 hsize = XFS_HSIZE(handle);
122 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
123 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
129 if (cmd == XFS_IOC_FD_TO_HANDLE)
137 * No need to do permission checks on the various pathname components
138 * as the handle operations are privileged.
141 xfs_handle_acceptable(
143 struct dentry *dentry)
149 * Convert userspace handle data into a dentry.
152 xfs_handle_to_dentry(
153 struct file *parfilp,
154 void __user *uhandle,
158 struct xfs_fid64 fid;
161 * Only allow handle opens under a directory.
163 if (!S_ISDIR(file_inode(parfilp)->i_mode))
164 return ERR_PTR(-ENOTDIR);
166 if (hlen != sizeof(xfs_handle_t))
167 return ERR_PTR(-EINVAL);
168 if (copy_from_user(&handle, uhandle, hlen))
169 return ERR_PTR(-EFAULT);
170 if (handle.ha_fid.fid_len !=
171 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
172 return ERR_PTR(-EINVAL);
174 memset(&fid, 0, sizeof(struct fid));
175 fid.ino = handle.ha_fid.fid_ino;
176 fid.gen = handle.ha_fid.fid_gen;
178 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
179 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
180 xfs_handle_acceptable, NULL);
183 STATIC struct dentry *
184 xfs_handlereq_to_dentry(
185 struct file *parfilp,
186 xfs_fsop_handlereq_t *hreq)
188 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
193 struct file *parfilp,
194 xfs_fsop_handlereq_t *hreq)
196 const struct cred *cred = current_cred();
202 struct dentry *dentry;
206 if (!capable(CAP_SYS_ADMIN))
209 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
211 return PTR_ERR(dentry);
212 inode = dentry->d_inode;
214 /* Restrict xfs_open_by_handle to directories & regular files. */
215 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
220 #if BITS_PER_LONG != 32
221 hreq->oflags |= O_LARGEFILE;
224 permflag = hreq->oflags;
225 fmode = OPEN_FMODE(permflag);
226 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
227 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
232 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
237 /* Can't write directories. */
238 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
243 fd = get_unused_fd_flags(0);
249 path.mnt = parfilp->f_path.mnt;
250 path.dentry = dentry;
251 filp = dentry_open(&path, hreq->oflags, cred);
255 return PTR_ERR(filp);
258 if (S_ISREG(inode->i_mode)) {
259 filp->f_flags |= O_NOATIME;
260 filp->f_mode |= FMODE_NOCMTIME;
263 fd_install(fd, filp);
272 xfs_readlink_by_handle(
273 struct file *parfilp,
274 xfs_fsop_handlereq_t *hreq)
276 struct dentry *dentry;
281 if (!capable(CAP_SYS_ADMIN))
284 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
286 return PTR_ERR(dentry);
288 /* Restrict this handle operation to symlinks only. */
289 if (!S_ISLNK(dentry->d_inode->i_mode)) {
294 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
299 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
305 error = xfs_readlink(XFS_I(dentry->d_inode), link);
308 error = readlink_copy(hreq->ohandle, olen, link);
325 xfs_mount_t *mp = ip->i_mount;
329 if (!capable(CAP_SYS_ADMIN))
332 if (XFS_FORCED_SHUTDOWN(mp))
335 tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS);
336 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
338 xfs_trans_cancel(tp, 0);
341 xfs_ilock(ip, XFS_ILOCK_EXCL);
342 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
344 ip->i_d.di_dmevmask = evmask;
345 ip->i_d.di_dmstate = state;
347 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
348 error = xfs_trans_commit(tp, 0);
354 xfs_fssetdm_by_handle(
355 struct file *parfilp,
359 struct fsdmidata fsd;
360 xfs_fsop_setdm_handlereq_t dmhreq;
361 struct dentry *dentry;
363 if (!capable(CAP_MKNOD))
365 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
368 error = mnt_want_write_file(parfilp);
372 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
373 if (IS_ERR(dentry)) {
374 mnt_drop_write_file(parfilp);
375 return PTR_ERR(dentry);
378 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
383 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
388 error = xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
392 mnt_drop_write_file(parfilp);
398 xfs_attrlist_by_handle(
399 struct file *parfilp,
403 attrlist_cursor_kern_t *cursor;
404 xfs_fsop_attrlist_handlereq_t al_hreq;
405 struct dentry *dentry;
408 if (!capable(CAP_SYS_ADMIN))
410 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
412 if (al_hreq.buflen < sizeof(struct attrlist) ||
413 al_hreq.buflen > XATTR_LIST_MAX)
417 * Reject flags, only allow namespaces.
419 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
422 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
424 return PTR_ERR(dentry);
426 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
430 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
431 error = xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
432 al_hreq.flags, cursor);
436 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
447 xfs_attrmulti_attr_get(
450 unsigned char __user *ubuf,
457 if (*len > XATTR_SIZE_MAX)
459 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
463 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
467 if (copy_to_user(ubuf, kbuf, *len))
476 xfs_attrmulti_attr_set(
479 const unsigned char __user *ubuf,
485 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
487 if (len > XATTR_SIZE_MAX)
490 kbuf = memdup_user(ubuf, len);
492 return PTR_ERR(kbuf);
494 return xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
498 xfs_attrmulti_attr_remove(
503 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
505 return xfs_attr_remove(XFS_I(inode), name, flags);
509 xfs_attrmulti_by_handle(
510 struct file *parfilp,
514 xfs_attr_multiop_t *ops;
515 xfs_fsop_attrmulti_handlereq_t am_hreq;
516 struct dentry *dentry;
517 unsigned int i, size;
518 unsigned char *attr_name;
520 if (!capable(CAP_SYS_ADMIN))
522 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
526 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
529 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
531 return PTR_ERR(dentry);
534 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
535 if (!size || size > 16 * PAGE_SIZE)
538 ops = memdup_user(am_hreq.ops, size);
540 error = PTR_ERR(ops);
545 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
550 for (i = 0; i < am_hreq.opcount; i++) {
551 ops[i].am_error = strncpy_from_user((char *)attr_name,
552 ops[i].am_attrname, MAXNAMELEN);
553 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
555 if (ops[i].am_error < 0)
558 switch (ops[i].am_opcode) {
560 ops[i].am_error = xfs_attrmulti_attr_get(
561 dentry->d_inode, attr_name,
562 ops[i].am_attrvalue, &ops[i].am_length,
566 ops[i].am_error = mnt_want_write_file(parfilp);
569 ops[i].am_error = xfs_attrmulti_attr_set(
570 dentry->d_inode, attr_name,
571 ops[i].am_attrvalue, ops[i].am_length,
573 mnt_drop_write_file(parfilp);
576 ops[i].am_error = mnt_want_write_file(parfilp);
579 ops[i].am_error = xfs_attrmulti_attr_remove(
580 dentry->d_inode, attr_name,
582 mnt_drop_write_file(parfilp);
585 ops[i].am_error = -EINVAL;
589 if (copy_to_user(am_hreq.ops, ops, size))
602 struct xfs_inode *ip,
609 struct xfs_mount *mp = ip->i_mount;
610 struct xfs_trans *tp;
612 bool setprealloc = false;
613 bool clrprealloc = false;
617 * Only allow the sys admin to reserve space unless
618 * unwritten extents are enabled.
620 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
621 !capable(CAP_SYS_ADMIN))
624 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
627 if (!(filp->f_mode & FMODE_WRITE))
630 if (!S_ISREG(inode->i_mode))
633 error = mnt_want_write_file(filp);
637 xfs_ilock(ip, XFS_IOLOCK_EXCL);
639 switch (bf->l_whence) {
643 bf->l_start += filp->f_pos;
646 bf->l_start += XFS_ISIZE(ip);
654 * length of <= 0 for resv/unresv/zero is invalid. length for
655 * alloc/free is ignored completely and we have no idea what userspace
656 * might have set it to, so set it to zero to allow range
660 case XFS_IOC_ZERO_RANGE:
662 case XFS_IOC_RESVSP64:
663 case XFS_IOC_UNRESVSP:
664 case XFS_IOC_UNRESVSP64:
665 if (bf->l_len <= 0) {
675 if (bf->l_start < 0 ||
676 bf->l_start > mp->m_super->s_maxbytes ||
677 bf->l_start + bf->l_len < 0 ||
678 bf->l_start + bf->l_len >= mp->m_super->s_maxbytes) {
684 case XFS_IOC_ZERO_RANGE:
685 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
690 case XFS_IOC_RESVSP64:
691 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
696 case XFS_IOC_UNRESVSP:
697 case XFS_IOC_UNRESVSP64:
698 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
700 case XFS_IOC_ALLOCSP:
701 case XFS_IOC_ALLOCSP64:
703 case XFS_IOC_FREESP64:
704 if (bf->l_start > XFS_ISIZE(ip)) {
705 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
706 bf->l_start - XFS_ISIZE(ip), 0);
711 iattr.ia_valid = ATTR_SIZE;
712 iattr.ia_size = bf->l_start;
714 error = xfs_setattr_size(ip, &iattr);
726 tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID);
727 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_writeid, 0, 0);
729 xfs_trans_cancel(tp, 0);
733 xfs_ilock(ip, XFS_ILOCK_EXCL);
734 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
736 if (!(ioflags & XFS_IO_INVIS)) {
737 ip->i_d.di_mode &= ~S_ISUID;
738 if (ip->i_d.di_mode & S_IXGRP)
739 ip->i_d.di_mode &= ~S_ISGID;
740 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
744 ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC;
745 else if (clrprealloc)
746 ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC;
748 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
749 if (filp->f_flags & O_DSYNC)
750 xfs_trans_set_sync(tp);
751 error = xfs_trans_commit(tp, 0);
754 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
755 mnt_drop_write_file(filp);
765 xfs_fsop_bulkreq_t bulkreq;
766 int count; /* # of records returned */
767 xfs_ino_t inlast; /* last inode number */
771 /* done = 1 if there are more stats to get and if bulkstat */
772 /* should be called again (unused here, but used in dmapi) */
774 if (!capable(CAP_SYS_ADMIN))
777 if (XFS_FORCED_SHUTDOWN(mp))
780 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
783 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
786 if ((count = bulkreq.icount) <= 0)
789 if (bulkreq.ubuffer == NULL)
792 if (cmd == XFS_IOC_FSINUMBERS)
793 error = xfs_inumbers(mp, &inlast, &count,
794 bulkreq.ubuffer, xfs_inumbers_fmt);
795 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
796 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
797 sizeof(xfs_bstat_t), NULL, &done);
798 else /* XFS_IOC_FSBULKSTAT */
799 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
800 sizeof(xfs_bstat_t), bulkreq.ubuffer,
806 if (bulkreq.ocount != NULL) {
807 if (copy_to_user(bulkreq.lastip, &inlast,
811 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
819 xfs_ioc_fsgeometry_v1(
823 xfs_fsop_geom_t fsgeo;
826 error = xfs_fs_geometry(mp, &fsgeo, 3);
831 * Caller should have passed an argument of type
832 * xfs_fsop_geom_v1_t. This is a proper subset of the
833 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
835 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
845 xfs_fsop_geom_t fsgeo;
848 error = xfs_fs_geometry(mp, &fsgeo, 4);
852 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
858 * Linux extended inode flags interface.
862 xfs_merge_ioc_xflags(
866 unsigned int xflags = start;
868 if (flags & FS_IMMUTABLE_FL)
869 xflags |= XFS_XFLAG_IMMUTABLE;
871 xflags &= ~XFS_XFLAG_IMMUTABLE;
872 if (flags & FS_APPEND_FL)
873 xflags |= XFS_XFLAG_APPEND;
875 xflags &= ~XFS_XFLAG_APPEND;
876 if (flags & FS_SYNC_FL)
877 xflags |= XFS_XFLAG_SYNC;
879 xflags &= ~XFS_XFLAG_SYNC;
880 if (flags & FS_NOATIME_FL)
881 xflags |= XFS_XFLAG_NOATIME;
883 xflags &= ~XFS_XFLAG_NOATIME;
884 if (flags & FS_NODUMP_FL)
885 xflags |= XFS_XFLAG_NODUMP;
887 xflags &= ~XFS_XFLAG_NODUMP;
896 unsigned int flags = 0;
898 if (di_flags & XFS_DIFLAG_IMMUTABLE)
899 flags |= FS_IMMUTABLE_FL;
900 if (di_flags & XFS_DIFLAG_APPEND)
901 flags |= FS_APPEND_FL;
902 if (di_flags & XFS_DIFLAG_SYNC)
904 if (di_flags & XFS_DIFLAG_NOATIME)
905 flags |= FS_NOATIME_FL;
906 if (di_flags & XFS_DIFLAG_NODUMP)
907 flags |= FS_NODUMP_FL;
919 memset(&fa, 0, sizeof(struct fsxattr));
921 xfs_ilock(ip, XFS_ILOCK_SHARED);
922 fa.fsx_xflags = xfs_ip2xflags(ip);
923 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
924 fa.fsx_projid = xfs_get_projid(ip);
928 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
929 fa.fsx_nextents = ip->i_afp->if_bytes /
930 sizeof(xfs_bmbt_rec_t);
932 fa.fsx_nextents = ip->i_d.di_anextents;
936 if (ip->i_df.if_flags & XFS_IFEXTENTS)
937 fa.fsx_nextents = ip->i_df.if_bytes /
938 sizeof(xfs_bmbt_rec_t);
940 fa.fsx_nextents = ip->i_d.di_nextents;
942 xfs_iunlock(ip, XFS_ILOCK_SHARED);
944 if (copy_to_user(arg, &fa, sizeof(fa)))
951 struct xfs_inode *ip,
954 unsigned int di_flags;
956 /* can't set PREALLOC this way, just preserve it */
957 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
958 if (xflags & XFS_XFLAG_IMMUTABLE)
959 di_flags |= XFS_DIFLAG_IMMUTABLE;
960 if (xflags & XFS_XFLAG_APPEND)
961 di_flags |= XFS_DIFLAG_APPEND;
962 if (xflags & XFS_XFLAG_SYNC)
963 di_flags |= XFS_DIFLAG_SYNC;
964 if (xflags & XFS_XFLAG_NOATIME)
965 di_flags |= XFS_DIFLAG_NOATIME;
966 if (xflags & XFS_XFLAG_NODUMP)
967 di_flags |= XFS_DIFLAG_NODUMP;
968 if (xflags & XFS_XFLAG_NODEFRAG)
969 di_flags |= XFS_DIFLAG_NODEFRAG;
970 if (xflags & XFS_XFLAG_FILESTREAM)
971 di_flags |= XFS_DIFLAG_FILESTREAM;
972 if (S_ISDIR(ip->i_d.di_mode)) {
973 if (xflags & XFS_XFLAG_RTINHERIT)
974 di_flags |= XFS_DIFLAG_RTINHERIT;
975 if (xflags & XFS_XFLAG_NOSYMLINKS)
976 di_flags |= XFS_DIFLAG_NOSYMLINKS;
977 if (xflags & XFS_XFLAG_EXTSZINHERIT)
978 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
979 if (xflags & XFS_XFLAG_PROJINHERIT)
980 di_flags |= XFS_DIFLAG_PROJINHERIT;
981 } else if (S_ISREG(ip->i_d.di_mode)) {
982 if (xflags & XFS_XFLAG_REALTIME)
983 di_flags |= XFS_DIFLAG_REALTIME;
984 if (xflags & XFS_XFLAG_EXTSIZE)
985 di_flags |= XFS_DIFLAG_EXTSIZE;
988 ip->i_d.di_flags = di_flags;
992 xfs_diflags_to_linux(
993 struct xfs_inode *ip)
995 struct inode *inode = VFS_I(ip);
996 unsigned int xflags = xfs_ip2xflags(ip);
998 if (xflags & XFS_XFLAG_IMMUTABLE)
999 inode->i_flags |= S_IMMUTABLE;
1001 inode->i_flags &= ~S_IMMUTABLE;
1002 if (xflags & XFS_XFLAG_APPEND)
1003 inode->i_flags |= S_APPEND;
1005 inode->i_flags &= ~S_APPEND;
1006 if (xflags & XFS_XFLAG_SYNC)
1007 inode->i_flags |= S_SYNC;
1009 inode->i_flags &= ~S_SYNC;
1010 if (xflags & XFS_XFLAG_NOATIME)
1011 inode->i_flags |= S_NOATIME;
1013 inode->i_flags &= ~S_NOATIME;
1016 #define FSX_PROJID 1
1017 #define FSX_EXTSIZE 2
1018 #define FSX_XFLAGS 4
1019 #define FSX_NONBLOCK 8
1027 struct xfs_mount *mp = ip->i_mount;
1028 struct xfs_trans *tp;
1029 unsigned int lock_flags = 0;
1030 struct xfs_dquot *udqp = NULL;
1031 struct xfs_dquot *pdqp = NULL;
1032 struct xfs_dquot *olddquot = NULL;
1035 trace_xfs_ioctl_setattr(ip);
1037 if (mp->m_flags & XFS_MOUNT_RDONLY)
1039 if (XFS_FORCED_SHUTDOWN(mp))
1043 * Disallow 32bit project ids when projid32bit feature is not enabled.
1045 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
1046 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1050 * If disk quotas is on, we make sure that the dquots do exist on disk,
1051 * before we start any other transactions. Trying to do this later
1052 * is messy. We don't care to take a readlock to look at the ids
1053 * in inode here, because we can't hold it across the trans_reserve.
1054 * If the IDs do change before we take the ilock, we're covered
1055 * because the i_*dquot fields will get updated anyway.
1057 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
1058 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1059 ip->i_d.di_gid, fa->fsx_projid,
1060 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1066 * For the other attributes, we acquire the inode lock and
1067 * first do an error checking pass.
1069 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
1070 code = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
1074 lock_flags = XFS_ILOCK_EXCL;
1075 xfs_ilock(ip, lock_flags);
1078 * CAP_FOWNER overrides the following restrictions:
1080 * The user ID of the calling process must be equal
1081 * to the file owner ID, except in cases where the
1082 * CAP_FSETID capability is applicable.
1084 if (!inode_owner_or_capable(VFS_I(ip))) {
1090 * Do a quota reservation only if projid is actually going to change.
1091 * Only allow changing of projid from init_user_ns since it is a
1092 * non user namespace aware identifier.
1094 if (mask & FSX_PROJID) {
1095 if (current_user_ns() != &init_user_ns) {
1100 if (XFS_IS_QUOTA_RUNNING(mp) &&
1101 XFS_IS_PQUOTA_ON(mp) &&
1102 xfs_get_projid(ip) != fa->fsx_projid) {
1104 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL,
1105 pdqp, capable(CAP_FOWNER) ?
1106 XFS_QMOPT_FORCE_RES : 0);
1107 if (code) /* out of quota */
1112 if (mask & FSX_EXTSIZE) {
1114 * Can't change extent size if any extents are allocated.
1116 if (ip->i_d.di_nextents &&
1117 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
1119 code = -EINVAL; /* EFBIG? */
1124 * Extent size must be a multiple of the appropriate block
1125 * size, if set at all. It must also be smaller than the
1126 * maximum extent size supported by the filesystem.
1128 * Also, for non-realtime files, limit the extent size hint to
1129 * half the size of the AGs in the filesystem so alignment
1130 * doesn't result in extents larger than an AG.
1132 if (fa->fsx_extsize != 0) {
1134 xfs_fsblock_t extsize_fsb;
1136 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1137 if (extsize_fsb > MAXEXTLEN) {
1142 if (XFS_IS_REALTIME_INODE(ip) ||
1143 ((mask & FSX_XFLAGS) &&
1144 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1145 size = mp->m_sb.sb_rextsize <<
1146 mp->m_sb.sb_blocklog;
1148 size = mp->m_sb.sb_blocksize;
1149 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1155 if (fa->fsx_extsize % size) {
1163 if (mask & FSX_XFLAGS) {
1165 * Can't change realtime flag if any extents are allocated.
1167 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1168 (XFS_IS_REALTIME_INODE(ip)) !=
1169 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1170 code = -EINVAL; /* EFBIG? */
1175 * If realtime flag is set then must have realtime data.
1177 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1178 if ((mp->m_sb.sb_rblocks == 0) ||
1179 (mp->m_sb.sb_rextsize == 0) ||
1180 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1187 * Can't modify an immutable/append-only file unless
1188 * we have appropriate permission.
1190 if ((ip->i_d.di_flags &
1191 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1193 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1194 !capable(CAP_LINUX_IMMUTABLE)) {
1200 xfs_trans_ijoin(tp, ip, 0);
1203 * Change file ownership. Must be the owner or privileged.
1205 if (mask & FSX_PROJID) {
1207 * CAP_FSETID overrides the following restrictions:
1209 * The set-user-ID and set-group-ID bits of a file will be
1210 * cleared upon successful return from chown()
1212 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1213 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1214 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1217 * Change the ownerships and register quota modifications
1218 * in the transaction.
1220 if (xfs_get_projid(ip) != fa->fsx_projid) {
1221 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1222 olddquot = xfs_qm_vop_chown(tp, ip,
1223 &ip->i_pdquot, pdqp);
1225 ASSERT(ip->i_d.di_version > 1);
1226 xfs_set_projid(ip, fa->fsx_projid);
1231 if (mask & FSX_XFLAGS) {
1232 xfs_set_diflags(ip, fa->fsx_xflags);
1233 xfs_diflags_to_linux(ip);
1237 * Only set the extent size hint if we've already determined that the
1238 * extent size hint should be set on the inode. If no extent size flags
1239 * are set on the inode then unconditionally clear the extent size hint.
1241 if (mask & FSX_EXTSIZE) {
1244 if (ip->i_d.di_flags &
1245 (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1246 extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1247 ip->i_d.di_extsize = extsize;
1250 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1251 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1253 XFS_STATS_INC(xs_ig_attrchg);
1256 * If this is a synchronous mount, make sure that the
1257 * transaction goes to disk before returning to the user.
1258 * This is slightly sub-optimal in that truncates require
1259 * two sync transactions instead of one for wsync filesystems.
1260 * One for the truncate and one for the timestamps since we
1261 * don't want to change the timestamps unless we're sure the
1262 * truncate worked. Truncates are less than 1% of the laddis
1263 * mix so this probably isn't worth the trouble to optimize.
1265 if (mp->m_flags & XFS_MOUNT_WSYNC)
1266 xfs_trans_set_sync(tp);
1267 code = xfs_trans_commit(tp, 0);
1268 xfs_iunlock(ip, lock_flags);
1271 * Release any dquot(s) the inode had kept before chown.
1273 xfs_qm_dqrele(olddquot);
1274 xfs_qm_dqrele(udqp);
1275 xfs_qm_dqrele(pdqp);
1280 xfs_qm_dqrele(udqp);
1281 xfs_qm_dqrele(pdqp);
1282 xfs_trans_cancel(tp, 0);
1284 xfs_iunlock(ip, lock_flags);
1298 if (copy_from_user(&fa, arg, sizeof(fa)))
1301 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
1302 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1303 mask |= FSX_NONBLOCK;
1305 error = mnt_want_write_file(filp);
1308 error = xfs_ioctl_setattr(ip, &fa, mask);
1309 mnt_drop_write_file(filp);
1320 flags = xfs_di2lxflags(ip->i_d.di_flags);
1321 if (copy_to_user(arg, &flags, sizeof(flags)))
1337 if (copy_from_user(&flags, arg, sizeof(flags)))
1340 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1341 FS_NOATIME_FL | FS_NODUMP_FL | \
1346 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
1347 mask |= FSX_NONBLOCK;
1348 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1350 error = mnt_want_write_file(filp);
1353 error = xfs_ioctl_setattr(ip, &fa, mask);
1354 mnt_drop_write_file(filp);
1359 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1361 struct getbmap __user *base = (struct getbmap __user *)*ap;
1363 /* copy only getbmap portion (not getbmapx) */
1364 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1367 *ap += sizeof(struct getbmap);
1373 struct xfs_inode *ip,
1378 struct getbmapx bmx;
1381 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
1384 if (bmx.bmv_count < 2)
1387 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1388 if (ioflags & XFS_IO_INVIS)
1389 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1391 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1392 (__force struct getbmap *)arg+1);
1396 /* copy back header - only size of getbmap */
1397 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1403 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1405 struct getbmapx __user *base = (struct getbmapx __user *)*ap;
1407 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1410 *ap += sizeof(struct getbmapx);
1416 struct xfs_inode *ip,
1419 struct getbmapx bmx;
1422 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1425 if (bmx.bmv_count < 2)
1428 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1431 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1432 (__force struct getbmapx *)arg+1);
1436 /* copy back header */
1437 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1447 xfs_inode_t *ip, *tip;
1451 /* Pull information for the target fd */
1452 f = fdget((int)sxp->sx_fdtarget);
1458 if (!(f.file->f_mode & FMODE_WRITE) ||
1459 !(f.file->f_mode & FMODE_READ) ||
1460 (f.file->f_flags & O_APPEND)) {
1465 tmp = fdget((int)sxp->sx_fdtmp);
1471 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1472 !(tmp.file->f_mode & FMODE_READ) ||
1473 (tmp.file->f_flags & O_APPEND)) {
1475 goto out_put_tmp_file;
1478 if (IS_SWAPFILE(file_inode(f.file)) ||
1479 IS_SWAPFILE(file_inode(tmp.file))) {
1481 goto out_put_tmp_file;
1484 ip = XFS_I(file_inode(f.file));
1485 tip = XFS_I(file_inode(tmp.file));
1487 if (ip->i_mount != tip->i_mount) {
1489 goto out_put_tmp_file;
1492 if (ip->i_ino == tip->i_ino) {
1494 goto out_put_tmp_file;
1497 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1499 goto out_put_tmp_file;
1502 error = xfs_swap_extents(ip, tip, sxp);
1513 * Note: some of the ioctl's return positive numbers as a
1514 * byte count indicating success, such as readlink_by_handle.
1515 * So we don't "sign flip" like most other routines. This means
1516 * true errors need to be returned as a negative value.
1524 struct inode *inode = file_inode(filp);
1525 struct xfs_inode *ip = XFS_I(inode);
1526 struct xfs_mount *mp = ip->i_mount;
1527 void __user *arg = (void __user *)p;
1531 if (filp->f_mode & FMODE_NOCMTIME)
1532 ioflags |= XFS_IO_INVIS;
1534 trace_xfs_file_ioctl(ip);
1538 return xfs_ioc_trim(mp, arg);
1539 case XFS_IOC_ALLOCSP:
1540 case XFS_IOC_FREESP:
1541 case XFS_IOC_RESVSP:
1542 case XFS_IOC_UNRESVSP:
1543 case XFS_IOC_ALLOCSP64:
1544 case XFS_IOC_FREESP64:
1545 case XFS_IOC_RESVSP64:
1546 case XFS_IOC_UNRESVSP64:
1547 case XFS_IOC_ZERO_RANGE: {
1550 if (copy_from_user(&bf, arg, sizeof(bf)))
1552 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1554 case XFS_IOC_DIOINFO: {
1556 xfs_buftarg_t *target =
1557 XFS_IS_REALTIME_INODE(ip) ?
1558 mp->m_rtdev_targp : mp->m_ddev_targp;
1560 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1561 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1563 if (copy_to_user(arg, &da, sizeof(da)))
1568 case XFS_IOC_FSBULKSTAT_SINGLE:
1569 case XFS_IOC_FSBULKSTAT:
1570 case XFS_IOC_FSINUMBERS:
1571 return xfs_ioc_bulkstat(mp, cmd, arg);
1573 case XFS_IOC_FSGEOMETRY_V1:
1574 return xfs_ioc_fsgeometry_v1(mp, arg);
1576 case XFS_IOC_FSGEOMETRY:
1577 return xfs_ioc_fsgeometry(mp, arg);
1579 case XFS_IOC_GETVERSION:
1580 return put_user(inode->i_generation, (int __user *)arg);
1582 case XFS_IOC_FSGETXATTR:
1583 return xfs_ioc_fsgetxattr(ip, 0, arg);
1584 case XFS_IOC_FSGETXATTRA:
1585 return xfs_ioc_fsgetxattr(ip, 1, arg);
1586 case XFS_IOC_FSSETXATTR:
1587 return xfs_ioc_fssetxattr(ip, filp, arg);
1588 case XFS_IOC_GETXFLAGS:
1589 return xfs_ioc_getxflags(ip, arg);
1590 case XFS_IOC_SETXFLAGS:
1591 return xfs_ioc_setxflags(ip, filp, arg);
1593 case XFS_IOC_FSSETDM: {
1594 struct fsdmidata dmi;
1596 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1599 error = mnt_want_write_file(filp);
1603 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1605 mnt_drop_write_file(filp);
1609 case XFS_IOC_GETBMAP:
1610 case XFS_IOC_GETBMAPA:
1611 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1613 case XFS_IOC_GETBMAPX:
1614 return xfs_ioc_getbmapx(ip, arg);
1616 case XFS_IOC_FD_TO_HANDLE:
1617 case XFS_IOC_PATH_TO_HANDLE:
1618 case XFS_IOC_PATH_TO_FSHANDLE: {
1619 xfs_fsop_handlereq_t hreq;
1621 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1623 return xfs_find_handle(cmd, &hreq);
1625 case XFS_IOC_OPEN_BY_HANDLE: {
1626 xfs_fsop_handlereq_t hreq;
1628 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1630 return xfs_open_by_handle(filp, &hreq);
1632 case XFS_IOC_FSSETDM_BY_HANDLE:
1633 return xfs_fssetdm_by_handle(filp, arg);
1635 case XFS_IOC_READLINK_BY_HANDLE: {
1636 xfs_fsop_handlereq_t hreq;
1638 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1640 return xfs_readlink_by_handle(filp, &hreq);
1642 case XFS_IOC_ATTRLIST_BY_HANDLE:
1643 return xfs_attrlist_by_handle(filp, arg);
1645 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1646 return xfs_attrmulti_by_handle(filp, arg);
1648 case XFS_IOC_SWAPEXT: {
1649 struct xfs_swapext sxp;
1651 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1653 error = mnt_want_write_file(filp);
1656 error = xfs_ioc_swapext(&sxp);
1657 mnt_drop_write_file(filp);
1661 case XFS_IOC_FSCOUNTS: {
1662 xfs_fsop_counts_t out;
1664 error = xfs_fs_counts(mp, &out);
1668 if (copy_to_user(arg, &out, sizeof(out)))
1673 case XFS_IOC_SET_RESBLKS: {
1674 xfs_fsop_resblks_t inout;
1677 if (!capable(CAP_SYS_ADMIN))
1680 if (mp->m_flags & XFS_MOUNT_RDONLY)
1683 if (copy_from_user(&inout, arg, sizeof(inout)))
1686 error = mnt_want_write_file(filp);
1690 /* input parameter is passed in resblks field of structure */
1692 error = xfs_reserve_blocks(mp, &in, &inout);
1693 mnt_drop_write_file(filp);
1697 if (copy_to_user(arg, &inout, sizeof(inout)))
1702 case XFS_IOC_GET_RESBLKS: {
1703 xfs_fsop_resblks_t out;
1705 if (!capable(CAP_SYS_ADMIN))
1708 error = xfs_reserve_blocks(mp, NULL, &out);
1712 if (copy_to_user(arg, &out, sizeof(out)))
1718 case XFS_IOC_FSGROWFSDATA: {
1719 xfs_growfs_data_t in;
1721 if (copy_from_user(&in, arg, sizeof(in)))
1724 error = mnt_want_write_file(filp);
1727 error = xfs_growfs_data(mp, &in);
1728 mnt_drop_write_file(filp);
1732 case XFS_IOC_FSGROWFSLOG: {
1733 xfs_growfs_log_t in;
1735 if (copy_from_user(&in, arg, sizeof(in)))
1738 error = mnt_want_write_file(filp);
1741 error = xfs_growfs_log(mp, &in);
1742 mnt_drop_write_file(filp);
1746 case XFS_IOC_FSGROWFSRT: {
1749 if (copy_from_user(&in, arg, sizeof(in)))
1752 error = mnt_want_write_file(filp);
1755 error = xfs_growfs_rt(mp, &in);
1756 mnt_drop_write_file(filp);
1760 case XFS_IOC_GOINGDOWN: {
1763 if (!capable(CAP_SYS_ADMIN))
1766 if (get_user(in, (__uint32_t __user *)arg))
1769 return xfs_fs_goingdown(mp, in);
1772 case XFS_IOC_ERROR_INJECTION: {
1773 xfs_error_injection_t in;
1775 if (!capable(CAP_SYS_ADMIN))
1778 if (copy_from_user(&in, arg, sizeof(in)))
1781 return xfs_errortag_add(in.errtag, mp);
1784 case XFS_IOC_ERROR_CLEARALL:
1785 if (!capable(CAP_SYS_ADMIN))
1788 return xfs_errortag_clearall(mp, 1);
1790 case XFS_IOC_FREE_EOFBLOCKS: {
1791 struct xfs_fs_eofblocks eofb;
1792 struct xfs_eofblocks keofb;
1794 if (!capable(CAP_SYS_ADMIN))
1797 if (mp->m_flags & XFS_MOUNT_RDONLY)
1800 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1803 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1807 return xfs_icache_free_eofblocks(mp, &keofb);