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 struct xfs_fsop_attrlist_handlereq __user *p = arg;
407 xfs_fsop_attrlist_handlereq_t al_hreq;
408 struct dentry *dentry;
411 if (!capable(CAP_SYS_ADMIN))
413 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
415 if (al_hreq.buflen < sizeof(struct attrlist) ||
416 al_hreq.buflen > XFS_XATTR_LIST_MAX)
420 * Reject flags, only allow namespaces.
422 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
425 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
427 return PTR_ERR(dentry);
429 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
433 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
434 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
435 al_hreq.flags, cursor);
439 if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
444 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
455 xfs_attrmulti_attr_get(
458 unsigned char __user *ubuf,
465 if (*len > XFS_XATTR_SIZE_MAX)
467 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
471 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
475 if (copy_to_user(ubuf, kbuf, *len))
484 xfs_attrmulti_attr_set(
487 const unsigned char __user *ubuf,
494 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
496 if (len > XFS_XATTR_SIZE_MAX)
499 kbuf = memdup_user(ubuf, len);
501 return PTR_ERR(kbuf);
503 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
505 xfs_forget_acl(inode, name, flags);
511 xfs_attrmulti_attr_remove(
518 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
520 error = xfs_attr_remove(XFS_I(inode), name, flags);
522 xfs_forget_acl(inode, name, flags);
527 xfs_attrmulti_by_handle(
528 struct file *parfilp,
532 xfs_attr_multiop_t *ops;
533 xfs_fsop_attrmulti_handlereq_t am_hreq;
534 struct dentry *dentry;
535 unsigned int i, size;
536 unsigned char *attr_name;
538 if (!capable(CAP_SYS_ADMIN))
540 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
544 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
547 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
549 return PTR_ERR(dentry);
552 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
553 if (!size || size > 16 * PAGE_SIZE)
556 ops = memdup_user(am_hreq.ops, size);
558 error = PTR_ERR(ops);
563 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
568 for (i = 0; i < am_hreq.opcount; i++) {
569 ops[i].am_error = strncpy_from_user((char *)attr_name,
570 ops[i].am_attrname, MAXNAMELEN);
571 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
573 if (ops[i].am_error < 0)
576 switch (ops[i].am_opcode) {
578 ops[i].am_error = xfs_attrmulti_attr_get(
579 d_inode(dentry), attr_name,
580 ops[i].am_attrvalue, &ops[i].am_length,
584 ops[i].am_error = mnt_want_write_file(parfilp);
587 ops[i].am_error = xfs_attrmulti_attr_set(
588 d_inode(dentry), attr_name,
589 ops[i].am_attrvalue, ops[i].am_length,
591 mnt_drop_write_file(parfilp);
594 ops[i].am_error = mnt_want_write_file(parfilp);
597 ops[i].am_error = xfs_attrmulti_attr_remove(
598 d_inode(dentry), attr_name,
600 mnt_drop_write_file(parfilp);
603 ops[i].am_error = -EINVAL;
607 if (copy_to_user(am_hreq.ops, ops, size))
620 struct xfs_inode *ip,
628 enum xfs_prealloc_flags flags = 0;
629 uint iolock = XFS_IOLOCK_EXCL;
633 * Only allow the sys admin to reserve space unless
634 * unwritten extents are enabled.
636 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
637 !capable(CAP_SYS_ADMIN))
640 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
643 if (!(filp->f_mode & FMODE_WRITE))
646 if (!S_ISREG(inode->i_mode))
649 if (filp->f_flags & O_DSYNC)
650 flags |= XFS_PREALLOC_SYNC;
651 if (ioflags & XFS_IO_INVIS)
652 flags |= XFS_PREALLOC_INVISIBLE;
654 error = mnt_want_write_file(filp);
658 xfs_ilock(ip, iolock);
659 error = xfs_break_layouts(inode, &iolock, false);
663 xfs_ilock(ip, XFS_MMAPLOCK_EXCL);
664 iolock |= XFS_MMAPLOCK_EXCL;
666 switch (bf->l_whence) {
670 bf->l_start += filp->f_pos;
673 bf->l_start += XFS_ISIZE(ip);
681 * length of <= 0 for resv/unresv/zero is invalid. length for
682 * alloc/free is ignored completely and we have no idea what userspace
683 * might have set it to, so set it to zero to allow range
687 case XFS_IOC_ZERO_RANGE:
689 case XFS_IOC_RESVSP64:
690 case XFS_IOC_UNRESVSP:
691 case XFS_IOC_UNRESVSP64:
692 if (bf->l_len <= 0) {
702 if (bf->l_start < 0 ||
703 bf->l_start > inode->i_sb->s_maxbytes ||
704 bf->l_start + bf->l_len < 0 ||
705 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
711 case XFS_IOC_ZERO_RANGE:
712 flags |= XFS_PREALLOC_SET;
713 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
716 case XFS_IOC_RESVSP64:
717 flags |= XFS_PREALLOC_SET;
718 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
721 case XFS_IOC_UNRESVSP:
722 case XFS_IOC_UNRESVSP64:
723 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
725 case XFS_IOC_ALLOCSP:
726 case XFS_IOC_ALLOCSP64:
728 case XFS_IOC_FREESP64:
729 flags |= XFS_PREALLOC_CLEAR;
730 if (bf->l_start > XFS_ISIZE(ip)) {
731 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
732 bf->l_start - XFS_ISIZE(ip),
738 iattr.ia_valid = ATTR_SIZE;
739 iattr.ia_size = bf->l_start;
741 error = xfs_setattr_size(ip, &iattr);
751 error = xfs_update_prealloc_flags(ip, flags);
754 xfs_iunlock(ip, iolock);
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;
1017 xfs_ioctl_setattr_xflags(
1018 struct xfs_trans *tp,
1019 struct xfs_inode *ip,
1022 struct xfs_mount *mp = ip->i_mount;
1024 /* Can't change realtime flag if any extents are allocated. */
1025 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1026 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & XFS_XFLAG_REALTIME))
1029 /* If realtime flag is set then must have realtime device */
1030 if (fa->fsx_xflags & XFS_XFLAG_REALTIME) {
1031 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1032 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1037 * Can't modify an immutable/append-only file unless
1038 * we have appropriate permission.
1040 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1041 (fa->fsx_xflags & (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1042 !capable(CAP_LINUX_IMMUTABLE))
1045 xfs_set_diflags(ip, fa->fsx_xflags);
1046 xfs_diflags_to_linux(ip);
1047 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1048 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1049 XFS_STATS_INC(mp, xs_ig_attrchg);
1054 * Set up the transaction structure for the setattr operation, checking that we
1055 * have permission to do so. On success, return a clean transaction and the
1056 * inode locked exclusively ready for further operation specific checks. On
1057 * failure, return an error without modifying or locking the inode.
1059 static struct xfs_trans *
1060 xfs_ioctl_setattr_get_trans(
1061 struct xfs_inode *ip)
1063 struct xfs_mount *mp = ip->i_mount;
1064 struct xfs_trans *tp;
1067 if (mp->m_flags & XFS_MOUNT_RDONLY)
1068 return ERR_PTR(-EROFS);
1069 if (XFS_FORCED_SHUTDOWN(mp))
1070 return ERR_PTR(-EIO);
1072 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
1073 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
1077 xfs_ilock(ip, XFS_ILOCK_EXCL);
1078 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1081 * CAP_FOWNER overrides the following restrictions:
1083 * The user ID of the calling process must be equal to the file owner
1084 * ID, except in cases where the CAP_FSETID capability is applicable.
1086 if (!inode_owner_or_capable(VFS_I(ip))) {
1091 if (mp->m_flags & XFS_MOUNT_WSYNC)
1092 xfs_trans_set_sync(tp);
1097 xfs_trans_cancel(tp);
1098 return ERR_PTR(error);
1102 * extent size hint validation is somewhat cumbersome. Rules are:
1104 * 1. extent size hint is only valid for directories and regular files
1105 * 2. XFS_XFLAG_EXTSIZE is only valid for regular files
1106 * 3. XFS_XFLAG_EXTSZINHERIT is only valid for directories.
1107 * 4. can only be changed on regular files if no extents are allocated
1108 * 5. can be changed on directories at any time
1109 * 6. extsize hint of 0 turns off hints, clears inode flags.
1110 * 7. Extent size must be a multiple of the appropriate block size.
1111 * 8. for non-realtime files, the extent size hint must be limited
1112 * to half the AG size to avoid alignment extending the extent beyond the
1116 xfs_ioctl_setattr_check_extsize(
1117 struct xfs_inode *ip,
1120 struct xfs_mount *mp = ip->i_mount;
1122 if ((fa->fsx_xflags & XFS_XFLAG_EXTSIZE) && !S_ISREG(ip->i_d.di_mode))
1125 if ((fa->fsx_xflags & XFS_XFLAG_EXTSZINHERIT) &&
1126 !S_ISDIR(ip->i_d.di_mode))
1129 if (S_ISREG(ip->i_d.di_mode) && ip->i_d.di_nextents &&
1130 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1133 if (fa->fsx_extsize != 0) {
1135 xfs_fsblock_t extsize_fsb;
1137 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1138 if (extsize_fsb > MAXEXTLEN)
1141 if (XFS_IS_REALTIME_INODE(ip) ||
1142 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1143 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1145 size = mp->m_sb.sb_blocksize;
1146 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1150 if (fa->fsx_extsize % size)
1153 fa->fsx_xflags &= ~(XFS_XFLAG_EXTSIZE | XFS_XFLAG_EXTSZINHERIT);
1159 xfs_ioctl_setattr_check_projid(
1160 struct xfs_inode *ip,
1163 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1164 if (fa->fsx_projid > (__uint16_t)-1 &&
1165 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1169 * Project Quota ID state is only allowed to change from within the init
1170 * namespace. Enforce that restriction only if we are trying to change
1171 * the quota ID state. Everything else is allowed in user namespaces.
1173 if (current_user_ns() == &init_user_ns)
1176 if (xfs_get_projid(ip) != fa->fsx_projid)
1178 if ((fa->fsx_xflags & XFS_XFLAG_PROJINHERIT) !=
1179 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1190 struct xfs_mount *mp = ip->i_mount;
1191 struct xfs_trans *tp;
1192 struct xfs_dquot *udqp = NULL;
1193 struct xfs_dquot *pdqp = NULL;
1194 struct xfs_dquot *olddquot = NULL;
1197 trace_xfs_ioctl_setattr(ip);
1199 code = xfs_ioctl_setattr_check_projid(ip, fa);
1204 * If disk quotas is on, we make sure that the dquots do exist on disk,
1205 * before we start any other transactions. Trying to do this later
1206 * is messy. We don't care to take a readlock to look at the ids
1207 * in inode here, because we can't hold it across the trans_reserve.
1208 * If the IDs do change before we take the ilock, we're covered
1209 * because the i_*dquot fields will get updated anyway.
1211 if (XFS_IS_QUOTA_ON(mp)) {
1212 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1213 ip->i_d.di_gid, fa->fsx_projid,
1214 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1219 tp = xfs_ioctl_setattr_get_trans(ip);
1222 goto error_free_dquots;
1226 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1227 xfs_get_projid(ip) != fa->fsx_projid) {
1228 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1229 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1230 if (code) /* out of quota */
1231 goto error_trans_cancel;
1234 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1236 goto error_trans_cancel;
1238 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1240 goto error_trans_cancel;
1243 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1244 * overrides the following restrictions:
1246 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1247 * successful return from chown()
1250 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1251 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1252 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1254 /* Change the ownerships and register project quota modifications */
1255 if (xfs_get_projid(ip) != fa->fsx_projid) {
1256 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1257 olddquot = xfs_qm_vop_chown(tp, ip,
1258 &ip->i_pdquot, pdqp);
1260 ASSERT(ip->i_d.di_version > 1);
1261 xfs_set_projid(ip, fa->fsx_projid);
1265 * Only set the extent size hint if we've already determined that the
1266 * extent size hint should be set on the inode. If no extent size flags
1267 * are set on the inode then unconditionally clear the extent size hint.
1269 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1270 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1272 ip->i_d.di_extsize = 0;
1274 code = xfs_trans_commit(tp);
1277 * Release any dquot(s) the inode had kept before chown.
1279 xfs_qm_dqrele(olddquot);
1280 xfs_qm_dqrele(udqp);
1281 xfs_qm_dqrele(pdqp);
1286 xfs_trans_cancel(tp);
1288 xfs_qm_dqrele(udqp);
1289 xfs_qm_dqrele(pdqp);
1302 if (copy_from_user(&fa, arg, sizeof(fa)))
1305 error = mnt_want_write_file(filp);
1308 error = xfs_ioctl_setattr(ip, &fa);
1309 mnt_drop_write_file(filp);
1320 flags = xfs_di2lxflags(ip->i_d.di_flags);
1321 if (copy_to_user(arg, &flags, sizeof(flags)))
1328 struct xfs_inode *ip,
1332 struct xfs_trans *tp;
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 | \
1345 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1347 error = mnt_want_write_file(filp);
1351 tp = xfs_ioctl_setattr_get_trans(ip);
1353 error = PTR_ERR(tp);
1354 goto out_drop_write;
1357 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1359 xfs_trans_cancel(tp);
1360 goto out_drop_write;
1363 error = xfs_trans_commit(tp);
1365 mnt_drop_write_file(filp);
1370 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1372 struct getbmap __user *base = (struct getbmap __user *)*ap;
1374 /* copy only getbmap portion (not getbmapx) */
1375 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1378 *ap += sizeof(struct getbmap);
1384 struct xfs_inode *ip,
1389 struct getbmapx bmx = { 0 };
1392 /* struct getbmap is a strict subset of struct getbmapx. */
1393 if (copy_from_user(&bmx, arg, offsetof(struct getbmapx, bmv_iflags)))
1396 if (bmx.bmv_count < 2)
1399 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1400 if (ioflags & XFS_IO_INVIS)
1401 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1403 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1404 (__force struct getbmap *)arg+1);
1408 /* copy back header - only size of getbmap */
1409 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1415 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1417 struct getbmapx __user *base = (struct getbmapx __user *)*ap;
1419 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1422 *ap += sizeof(struct getbmapx);
1428 struct xfs_inode *ip,
1431 struct getbmapx bmx;
1434 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1437 if (bmx.bmv_count < 2)
1440 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1443 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1444 (__force struct getbmapx *)arg+1);
1448 /* copy back header */
1449 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1459 xfs_inode_t *ip, *tip;
1463 /* Pull information for the target fd */
1464 f = fdget((int)sxp->sx_fdtarget);
1470 if (!(f.file->f_mode & FMODE_WRITE) ||
1471 !(f.file->f_mode & FMODE_READ) ||
1472 (f.file->f_flags & O_APPEND)) {
1477 tmp = fdget((int)sxp->sx_fdtmp);
1483 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1484 !(tmp.file->f_mode & FMODE_READ) ||
1485 (tmp.file->f_flags & O_APPEND)) {
1487 goto out_put_tmp_file;
1490 if (IS_SWAPFILE(file_inode(f.file)) ||
1491 IS_SWAPFILE(file_inode(tmp.file))) {
1493 goto out_put_tmp_file;
1496 ip = XFS_I(file_inode(f.file));
1497 tip = XFS_I(file_inode(tmp.file));
1499 if (ip->i_mount != tip->i_mount) {
1501 goto out_put_tmp_file;
1504 if (ip->i_ino == tip->i_ino) {
1506 goto out_put_tmp_file;
1509 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1511 goto out_put_tmp_file;
1514 error = xfs_swap_extents(ip, tip, sxp);
1525 * Note: some of the ioctl's return positive numbers as a
1526 * byte count indicating success, such as readlink_by_handle.
1527 * So we don't "sign flip" like most other routines. This means
1528 * true errors need to be returned as a negative value.
1536 struct inode *inode = file_inode(filp);
1537 struct xfs_inode *ip = XFS_I(inode);
1538 struct xfs_mount *mp = ip->i_mount;
1539 void __user *arg = (void __user *)p;
1543 if (filp->f_mode & FMODE_NOCMTIME)
1544 ioflags |= XFS_IO_INVIS;
1546 trace_xfs_file_ioctl(ip);
1550 return xfs_ioc_trim(mp, arg);
1551 case XFS_IOC_ALLOCSP:
1552 case XFS_IOC_FREESP:
1553 case XFS_IOC_RESVSP:
1554 case XFS_IOC_UNRESVSP:
1555 case XFS_IOC_ALLOCSP64:
1556 case XFS_IOC_FREESP64:
1557 case XFS_IOC_RESVSP64:
1558 case XFS_IOC_UNRESVSP64:
1559 case XFS_IOC_ZERO_RANGE: {
1562 if (copy_from_user(&bf, arg, sizeof(bf)))
1564 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1566 case XFS_IOC_DIOINFO: {
1568 xfs_buftarg_t *target =
1569 XFS_IS_REALTIME_INODE(ip) ?
1570 mp->m_rtdev_targp : mp->m_ddev_targp;
1572 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1573 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1575 if (copy_to_user(arg, &da, sizeof(da)))
1580 case XFS_IOC_FSBULKSTAT_SINGLE:
1581 case XFS_IOC_FSBULKSTAT:
1582 case XFS_IOC_FSINUMBERS:
1583 return xfs_ioc_bulkstat(mp, cmd, arg);
1585 case XFS_IOC_FSGEOMETRY_V1:
1586 return xfs_ioc_fsgeometry_v1(mp, arg);
1588 case XFS_IOC_FSGEOMETRY:
1589 return xfs_ioc_fsgeometry(mp, arg);
1591 case XFS_IOC_GETVERSION:
1592 return put_user(inode->i_generation, (int __user *)arg);
1594 case XFS_IOC_FSGETXATTR:
1595 return xfs_ioc_fsgetxattr(ip, 0, arg);
1596 case XFS_IOC_FSGETXATTRA:
1597 return xfs_ioc_fsgetxattr(ip, 1, arg);
1598 case XFS_IOC_FSSETXATTR:
1599 return xfs_ioc_fssetxattr(ip, filp, arg);
1600 case XFS_IOC_GETXFLAGS:
1601 return xfs_ioc_getxflags(ip, arg);
1602 case XFS_IOC_SETXFLAGS:
1603 return xfs_ioc_setxflags(ip, filp, arg);
1605 case XFS_IOC_FSSETDM: {
1606 struct fsdmidata dmi;
1608 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1611 error = mnt_want_write_file(filp);
1615 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1617 mnt_drop_write_file(filp);
1621 case XFS_IOC_GETBMAP:
1622 case XFS_IOC_GETBMAPA:
1623 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1625 case XFS_IOC_GETBMAPX:
1626 return xfs_ioc_getbmapx(ip, arg);
1628 case XFS_IOC_FD_TO_HANDLE:
1629 case XFS_IOC_PATH_TO_HANDLE:
1630 case XFS_IOC_PATH_TO_FSHANDLE: {
1631 xfs_fsop_handlereq_t hreq;
1633 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1635 return xfs_find_handle(cmd, &hreq);
1637 case XFS_IOC_OPEN_BY_HANDLE: {
1638 xfs_fsop_handlereq_t hreq;
1640 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1642 return xfs_open_by_handle(filp, &hreq);
1644 case XFS_IOC_FSSETDM_BY_HANDLE:
1645 return xfs_fssetdm_by_handle(filp, arg);
1647 case XFS_IOC_READLINK_BY_HANDLE: {
1648 xfs_fsop_handlereq_t hreq;
1650 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1652 return xfs_readlink_by_handle(filp, &hreq);
1654 case XFS_IOC_ATTRLIST_BY_HANDLE:
1655 return xfs_attrlist_by_handle(filp, arg);
1657 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1658 return xfs_attrmulti_by_handle(filp, arg);
1660 case XFS_IOC_SWAPEXT: {
1661 struct xfs_swapext sxp;
1663 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1665 error = mnt_want_write_file(filp);
1668 error = xfs_ioc_swapext(&sxp);
1669 mnt_drop_write_file(filp);
1673 case XFS_IOC_FSCOUNTS: {
1674 xfs_fsop_counts_t out;
1676 error = xfs_fs_counts(mp, &out);
1680 if (copy_to_user(arg, &out, sizeof(out)))
1685 case XFS_IOC_SET_RESBLKS: {
1686 xfs_fsop_resblks_t inout;
1689 if (!capable(CAP_SYS_ADMIN))
1692 if (mp->m_flags & XFS_MOUNT_RDONLY)
1695 if (copy_from_user(&inout, arg, sizeof(inout)))
1698 error = mnt_want_write_file(filp);
1702 /* input parameter is passed in resblks field of structure */
1704 error = xfs_reserve_blocks(mp, &in, &inout);
1705 mnt_drop_write_file(filp);
1709 if (copy_to_user(arg, &inout, sizeof(inout)))
1714 case XFS_IOC_GET_RESBLKS: {
1715 xfs_fsop_resblks_t out;
1717 if (!capable(CAP_SYS_ADMIN))
1720 error = xfs_reserve_blocks(mp, NULL, &out);
1724 if (copy_to_user(arg, &out, sizeof(out)))
1730 case XFS_IOC_FSGROWFSDATA: {
1731 xfs_growfs_data_t in;
1733 if (copy_from_user(&in, arg, sizeof(in)))
1736 error = mnt_want_write_file(filp);
1739 error = xfs_growfs_data(mp, &in);
1740 mnt_drop_write_file(filp);
1744 case XFS_IOC_FSGROWFSLOG: {
1745 xfs_growfs_log_t in;
1747 if (copy_from_user(&in, arg, sizeof(in)))
1750 error = mnt_want_write_file(filp);
1753 error = xfs_growfs_log(mp, &in);
1754 mnt_drop_write_file(filp);
1758 case XFS_IOC_FSGROWFSRT: {
1761 if (copy_from_user(&in, arg, sizeof(in)))
1764 error = mnt_want_write_file(filp);
1767 error = xfs_growfs_rt(mp, &in);
1768 mnt_drop_write_file(filp);
1772 case XFS_IOC_GOINGDOWN: {
1775 if (!capable(CAP_SYS_ADMIN))
1778 if (get_user(in, (__uint32_t __user *)arg))
1781 return xfs_fs_goingdown(mp, in);
1784 case XFS_IOC_ERROR_INJECTION: {
1785 xfs_error_injection_t in;
1787 if (!capable(CAP_SYS_ADMIN))
1790 if (copy_from_user(&in, arg, sizeof(in)))
1793 return xfs_errortag_add(in.errtag, mp);
1796 case XFS_IOC_ERROR_CLEARALL:
1797 if (!capable(CAP_SYS_ADMIN))
1800 return xfs_errortag_clearall(mp, 1);
1802 case XFS_IOC_FREE_EOFBLOCKS: {
1803 struct xfs_fs_eofblocks eofb;
1804 struct xfs_eofblocks keofb;
1806 if (!capable(CAP_SYS_ADMIN))
1809 if (mp->m_flags & XFS_MOUNT_RDONLY)
1812 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1815 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1819 return xfs_icache_free_eofblocks(mp, &keofb);