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), 0);
737 iattr.ia_valid = ATTR_SIZE;
738 iattr.ia_size = bf->l_start;
740 error = xfs_setattr_size(ip, &iattr);
750 error = xfs_update_prealloc_flags(ip, flags);
753 xfs_iunlock(ip, iolock);
754 mnt_drop_write_file(filp);
764 xfs_fsop_bulkreq_t bulkreq;
765 int count; /* # of records returned */
766 xfs_ino_t inlast; /* last inode number */
770 /* done = 1 if there are more stats to get and if bulkstat */
771 /* should be called again (unused here, but used in dmapi) */
773 if (!capable(CAP_SYS_ADMIN))
776 if (XFS_FORCED_SHUTDOWN(mp))
779 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
782 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
785 if ((count = bulkreq.icount) <= 0)
788 if (bulkreq.ubuffer == NULL)
791 if (cmd == XFS_IOC_FSINUMBERS)
792 error = xfs_inumbers(mp, &inlast, &count,
793 bulkreq.ubuffer, xfs_inumbers_fmt);
794 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
795 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
796 sizeof(xfs_bstat_t), NULL, &done);
797 else /* XFS_IOC_FSBULKSTAT */
798 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
799 sizeof(xfs_bstat_t), bulkreq.ubuffer,
805 if (bulkreq.ocount != NULL) {
806 if (copy_to_user(bulkreq.lastip, &inlast,
810 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
818 xfs_ioc_fsgeometry_v1(
822 xfs_fsop_geom_t fsgeo;
825 error = xfs_fs_geometry(mp, &fsgeo, 3);
830 * Caller should have passed an argument of type
831 * xfs_fsop_geom_v1_t. This is a proper subset of the
832 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
834 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
844 xfs_fsop_geom_t fsgeo;
847 error = xfs_fs_geometry(mp, &fsgeo, 4);
851 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
857 * Linux extended inode flags interface.
861 xfs_merge_ioc_xflags(
865 unsigned int xflags = start;
867 if (flags & FS_IMMUTABLE_FL)
868 xflags |= XFS_XFLAG_IMMUTABLE;
870 xflags &= ~XFS_XFLAG_IMMUTABLE;
871 if (flags & FS_APPEND_FL)
872 xflags |= XFS_XFLAG_APPEND;
874 xflags &= ~XFS_XFLAG_APPEND;
875 if (flags & FS_SYNC_FL)
876 xflags |= XFS_XFLAG_SYNC;
878 xflags &= ~XFS_XFLAG_SYNC;
879 if (flags & FS_NOATIME_FL)
880 xflags |= XFS_XFLAG_NOATIME;
882 xflags &= ~XFS_XFLAG_NOATIME;
883 if (flags & FS_NODUMP_FL)
884 xflags |= XFS_XFLAG_NODUMP;
886 xflags &= ~XFS_XFLAG_NODUMP;
895 unsigned int flags = 0;
897 if (di_flags & XFS_DIFLAG_IMMUTABLE)
898 flags |= FS_IMMUTABLE_FL;
899 if (di_flags & XFS_DIFLAG_APPEND)
900 flags |= FS_APPEND_FL;
901 if (di_flags & XFS_DIFLAG_SYNC)
903 if (di_flags & XFS_DIFLAG_NOATIME)
904 flags |= FS_NOATIME_FL;
905 if (di_flags & XFS_DIFLAG_NODUMP)
906 flags |= FS_NODUMP_FL;
918 memset(&fa, 0, sizeof(struct fsxattr));
920 xfs_ilock(ip, XFS_ILOCK_SHARED);
921 fa.fsx_xflags = xfs_ip2xflags(ip);
922 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
923 fa.fsx_projid = xfs_get_projid(ip);
927 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
928 fa.fsx_nextents = ip->i_afp->if_bytes /
929 sizeof(xfs_bmbt_rec_t);
931 fa.fsx_nextents = ip->i_d.di_anextents;
935 if (ip->i_df.if_flags & XFS_IFEXTENTS)
936 fa.fsx_nextents = ip->i_df.if_bytes /
937 sizeof(xfs_bmbt_rec_t);
939 fa.fsx_nextents = ip->i_d.di_nextents;
941 xfs_iunlock(ip, XFS_ILOCK_SHARED);
943 if (copy_to_user(arg, &fa, sizeof(fa)))
950 struct xfs_inode *ip,
953 unsigned int di_flags;
955 /* can't set PREALLOC this way, just preserve it */
956 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
957 if (xflags & XFS_XFLAG_IMMUTABLE)
958 di_flags |= XFS_DIFLAG_IMMUTABLE;
959 if (xflags & XFS_XFLAG_APPEND)
960 di_flags |= XFS_DIFLAG_APPEND;
961 if (xflags & XFS_XFLAG_SYNC)
962 di_flags |= XFS_DIFLAG_SYNC;
963 if (xflags & XFS_XFLAG_NOATIME)
964 di_flags |= XFS_DIFLAG_NOATIME;
965 if (xflags & XFS_XFLAG_NODUMP)
966 di_flags |= XFS_DIFLAG_NODUMP;
967 if (xflags & XFS_XFLAG_NODEFRAG)
968 di_flags |= XFS_DIFLAG_NODEFRAG;
969 if (xflags & XFS_XFLAG_FILESTREAM)
970 di_flags |= XFS_DIFLAG_FILESTREAM;
971 if (S_ISDIR(ip->i_d.di_mode)) {
972 if (xflags & XFS_XFLAG_RTINHERIT)
973 di_flags |= XFS_DIFLAG_RTINHERIT;
974 if (xflags & XFS_XFLAG_NOSYMLINKS)
975 di_flags |= XFS_DIFLAG_NOSYMLINKS;
976 if (xflags & XFS_XFLAG_EXTSZINHERIT)
977 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
978 if (xflags & XFS_XFLAG_PROJINHERIT)
979 di_flags |= XFS_DIFLAG_PROJINHERIT;
980 } else if (S_ISREG(ip->i_d.di_mode)) {
981 if (xflags & XFS_XFLAG_REALTIME)
982 di_flags |= XFS_DIFLAG_REALTIME;
983 if (xflags & XFS_XFLAG_EXTSIZE)
984 di_flags |= XFS_DIFLAG_EXTSIZE;
987 ip->i_d.di_flags = di_flags;
991 xfs_diflags_to_linux(
992 struct xfs_inode *ip)
994 struct inode *inode = VFS_I(ip);
995 unsigned int xflags = xfs_ip2xflags(ip);
997 if (xflags & XFS_XFLAG_IMMUTABLE)
998 inode->i_flags |= S_IMMUTABLE;
1000 inode->i_flags &= ~S_IMMUTABLE;
1001 if (xflags & XFS_XFLAG_APPEND)
1002 inode->i_flags |= S_APPEND;
1004 inode->i_flags &= ~S_APPEND;
1005 if (xflags & XFS_XFLAG_SYNC)
1006 inode->i_flags |= S_SYNC;
1008 inode->i_flags &= ~S_SYNC;
1009 if (xflags & XFS_XFLAG_NOATIME)
1010 inode->i_flags |= S_NOATIME;
1012 inode->i_flags &= ~S_NOATIME;
1016 xfs_ioctl_setattr_xflags(
1017 struct xfs_trans *tp,
1018 struct xfs_inode *ip,
1021 struct xfs_mount *mp = ip->i_mount;
1023 /* Can't change realtime flag if any extents are allocated. */
1024 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1025 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & XFS_XFLAG_REALTIME))
1028 /* If realtime flag is set then must have realtime device */
1029 if (fa->fsx_xflags & XFS_XFLAG_REALTIME) {
1030 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1031 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1036 * Can't modify an immutable/append-only file unless
1037 * we have appropriate permission.
1039 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1040 (fa->fsx_xflags & (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1041 !capable(CAP_LINUX_IMMUTABLE))
1044 xfs_set_diflags(ip, fa->fsx_xflags);
1045 xfs_diflags_to_linux(ip);
1046 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1047 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1048 XFS_STATS_INC(mp, xs_ig_attrchg);
1053 * Set up the transaction structure for the setattr operation, checking that we
1054 * have permission to do so. On success, return a clean transaction and the
1055 * inode locked exclusively ready for further operation specific checks. On
1056 * failure, return an error without modifying or locking the inode.
1058 static struct xfs_trans *
1059 xfs_ioctl_setattr_get_trans(
1060 struct xfs_inode *ip)
1062 struct xfs_mount *mp = ip->i_mount;
1063 struct xfs_trans *tp;
1066 if (mp->m_flags & XFS_MOUNT_RDONLY)
1067 return ERR_PTR(-EROFS);
1068 if (XFS_FORCED_SHUTDOWN(mp))
1069 return ERR_PTR(-EIO);
1071 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
1072 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
1076 xfs_ilock(ip, XFS_ILOCK_EXCL);
1077 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1080 * CAP_FOWNER overrides the following restrictions:
1082 * The user ID of the calling process must be equal to the file owner
1083 * ID, except in cases where the CAP_FSETID capability is applicable.
1085 if (!inode_owner_or_capable(VFS_I(ip))) {
1090 if (mp->m_flags & XFS_MOUNT_WSYNC)
1091 xfs_trans_set_sync(tp);
1096 xfs_trans_cancel(tp);
1097 return ERR_PTR(error);
1101 * extent size hint validation is somewhat cumbersome. Rules are:
1103 * 1. extent size hint is only valid for directories and regular files
1104 * 2. XFS_XFLAG_EXTSIZE is only valid for regular files
1105 * 3. XFS_XFLAG_EXTSZINHERIT is only valid for directories.
1106 * 4. can only be changed on regular files if no extents are allocated
1107 * 5. can be changed on directories at any time
1108 * 6. extsize hint of 0 turns off hints, clears inode flags.
1109 * 7. Extent size must be a multiple of the appropriate block size.
1110 * 8. for non-realtime files, the extent size hint must be limited
1111 * to half the AG size to avoid alignment extending the extent beyond the
1115 xfs_ioctl_setattr_check_extsize(
1116 struct xfs_inode *ip,
1119 struct xfs_mount *mp = ip->i_mount;
1121 if ((fa->fsx_xflags & XFS_XFLAG_EXTSIZE) && !S_ISREG(ip->i_d.di_mode))
1124 if ((fa->fsx_xflags & XFS_XFLAG_EXTSZINHERIT) &&
1125 !S_ISDIR(ip->i_d.di_mode))
1128 if (S_ISREG(ip->i_d.di_mode) && ip->i_d.di_nextents &&
1129 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
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)
1140 if (XFS_IS_REALTIME_INODE(ip) ||
1141 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1142 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1144 size = mp->m_sb.sb_blocksize;
1145 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1149 if (fa->fsx_extsize % size)
1152 fa->fsx_xflags &= ~(XFS_XFLAG_EXTSIZE | XFS_XFLAG_EXTSZINHERIT);
1158 xfs_ioctl_setattr_check_projid(
1159 struct xfs_inode *ip,
1162 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1163 if (fa->fsx_projid > (__uint16_t)-1 &&
1164 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1168 * Project Quota ID state is only allowed to change from within the init
1169 * namespace. Enforce that restriction only if we are trying to change
1170 * the quota ID state. Everything else is allowed in user namespaces.
1172 if (current_user_ns() == &init_user_ns)
1175 if (xfs_get_projid(ip) != fa->fsx_projid)
1177 if ((fa->fsx_xflags & XFS_XFLAG_PROJINHERIT) !=
1178 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1189 struct xfs_mount *mp = ip->i_mount;
1190 struct xfs_trans *tp;
1191 struct xfs_dquot *udqp = NULL;
1192 struct xfs_dquot *pdqp = NULL;
1193 struct xfs_dquot *olddquot = NULL;
1196 trace_xfs_ioctl_setattr(ip);
1198 code = xfs_ioctl_setattr_check_projid(ip, fa);
1203 * If disk quotas is on, we make sure that the dquots do exist on disk,
1204 * before we start any other transactions. Trying to do this later
1205 * is messy. We don't care to take a readlock to look at the ids
1206 * in inode here, because we can't hold it across the trans_reserve.
1207 * If the IDs do change before we take the ilock, we're covered
1208 * because the i_*dquot fields will get updated anyway.
1210 if (XFS_IS_QUOTA_ON(mp)) {
1211 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1212 ip->i_d.di_gid, fa->fsx_projid,
1213 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1218 tp = xfs_ioctl_setattr_get_trans(ip);
1221 goto error_free_dquots;
1225 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1226 xfs_get_projid(ip) != fa->fsx_projid) {
1227 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1228 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1229 if (code) /* out of quota */
1230 goto error_trans_cancel;
1233 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1235 goto error_trans_cancel;
1237 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1239 goto error_trans_cancel;
1242 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1243 * overrides the following restrictions:
1245 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1246 * successful return from chown()
1249 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1250 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1251 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1253 /* Change the ownerships and register project quota modifications */
1254 if (xfs_get_projid(ip) != fa->fsx_projid) {
1255 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1256 olddquot = xfs_qm_vop_chown(tp, ip,
1257 &ip->i_pdquot, pdqp);
1259 ASSERT(ip->i_d.di_version > 1);
1260 xfs_set_projid(ip, fa->fsx_projid);
1264 * Only set the extent size hint if we've already determined that the
1265 * extent size hint should be set on the inode. If no extent size flags
1266 * are set on the inode then unconditionally clear the extent size hint.
1268 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1269 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1271 ip->i_d.di_extsize = 0;
1273 code = xfs_trans_commit(tp);
1276 * Release any dquot(s) the inode had kept before chown.
1278 xfs_qm_dqrele(olddquot);
1279 xfs_qm_dqrele(udqp);
1280 xfs_qm_dqrele(pdqp);
1285 xfs_trans_cancel(tp);
1287 xfs_qm_dqrele(udqp);
1288 xfs_qm_dqrele(pdqp);
1301 if (copy_from_user(&fa, arg, sizeof(fa)))
1304 error = mnt_want_write_file(filp);
1307 error = xfs_ioctl_setattr(ip, &fa);
1308 mnt_drop_write_file(filp);
1319 flags = xfs_di2lxflags(ip->i_d.di_flags);
1320 if (copy_to_user(arg, &flags, sizeof(flags)))
1327 struct xfs_inode *ip,
1331 struct xfs_trans *tp;
1336 if (copy_from_user(&flags, arg, sizeof(flags)))
1339 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1340 FS_NOATIME_FL | FS_NODUMP_FL | \
1344 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1346 error = mnt_want_write_file(filp);
1350 tp = xfs_ioctl_setattr_get_trans(ip);
1352 error = PTR_ERR(tp);
1353 goto out_drop_write;
1356 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1358 xfs_trans_cancel(tp);
1359 goto out_drop_write;
1362 error = xfs_trans_commit(tp);
1364 mnt_drop_write_file(filp);
1369 xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1371 struct getbmap __user *base = (struct getbmap __user *)*ap;
1373 /* copy only getbmap portion (not getbmapx) */
1374 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1377 *ap += sizeof(struct getbmap);
1383 struct xfs_inode *ip,
1388 struct getbmapx bmx = { 0 };
1391 /* struct getbmap is a strict subset of struct getbmapx. */
1392 if (copy_from_user(&bmx, arg, offsetof(struct getbmapx, bmv_iflags)))
1395 if (bmx.bmv_count < 2)
1398 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
1399 if (ioflags & XFS_IO_INVIS)
1400 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1402 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1403 (__force struct getbmap *)arg+1);
1407 /* copy back header - only size of getbmap */
1408 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
1414 xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1416 struct getbmapx __user *base = (struct getbmapx __user *)*ap;
1418 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1421 *ap += sizeof(struct getbmapx);
1427 struct xfs_inode *ip,
1430 struct getbmapx bmx;
1433 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1436 if (bmx.bmv_count < 2)
1439 if (bmx.bmv_iflags & (~BMV_IF_VALID))
1442 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1443 (__force struct getbmapx *)arg+1);
1447 /* copy back header */
1448 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
1458 xfs_inode_t *ip, *tip;
1462 /* Pull information for the target fd */
1463 f = fdget((int)sxp->sx_fdtarget);
1469 if (!(f.file->f_mode & FMODE_WRITE) ||
1470 !(f.file->f_mode & FMODE_READ) ||
1471 (f.file->f_flags & O_APPEND)) {
1476 tmp = fdget((int)sxp->sx_fdtmp);
1482 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1483 !(tmp.file->f_mode & FMODE_READ) ||
1484 (tmp.file->f_flags & O_APPEND)) {
1486 goto out_put_tmp_file;
1489 if (IS_SWAPFILE(file_inode(f.file)) ||
1490 IS_SWAPFILE(file_inode(tmp.file))) {
1492 goto out_put_tmp_file;
1495 ip = XFS_I(file_inode(f.file));
1496 tip = XFS_I(file_inode(tmp.file));
1498 if (ip->i_mount != tip->i_mount) {
1500 goto out_put_tmp_file;
1503 if (ip->i_ino == tip->i_ino) {
1505 goto out_put_tmp_file;
1508 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1510 goto out_put_tmp_file;
1513 error = xfs_swap_extents(ip, tip, sxp);
1524 * Note: some of the ioctl's return positive numbers as a
1525 * byte count indicating success, such as readlink_by_handle.
1526 * So we don't "sign flip" like most other routines. This means
1527 * true errors need to be returned as a negative value.
1535 struct inode *inode = file_inode(filp);
1536 struct xfs_inode *ip = XFS_I(inode);
1537 struct xfs_mount *mp = ip->i_mount;
1538 void __user *arg = (void __user *)p;
1542 if (filp->f_mode & FMODE_NOCMTIME)
1543 ioflags |= XFS_IO_INVIS;
1545 trace_xfs_file_ioctl(ip);
1549 return xfs_ioc_trim(mp, arg);
1550 case XFS_IOC_ALLOCSP:
1551 case XFS_IOC_FREESP:
1552 case XFS_IOC_RESVSP:
1553 case XFS_IOC_UNRESVSP:
1554 case XFS_IOC_ALLOCSP64:
1555 case XFS_IOC_FREESP64:
1556 case XFS_IOC_RESVSP64:
1557 case XFS_IOC_UNRESVSP64:
1558 case XFS_IOC_ZERO_RANGE: {
1561 if (copy_from_user(&bf, arg, sizeof(bf)))
1563 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1565 case XFS_IOC_DIOINFO: {
1567 xfs_buftarg_t *target =
1568 XFS_IS_REALTIME_INODE(ip) ?
1569 mp->m_rtdev_targp : mp->m_ddev_targp;
1571 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1572 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1574 if (copy_to_user(arg, &da, sizeof(da)))
1579 case XFS_IOC_FSBULKSTAT_SINGLE:
1580 case XFS_IOC_FSBULKSTAT:
1581 case XFS_IOC_FSINUMBERS:
1582 return xfs_ioc_bulkstat(mp, cmd, arg);
1584 case XFS_IOC_FSGEOMETRY_V1:
1585 return xfs_ioc_fsgeometry_v1(mp, arg);
1587 case XFS_IOC_FSGEOMETRY:
1588 return xfs_ioc_fsgeometry(mp, arg);
1590 case XFS_IOC_GETVERSION:
1591 return put_user(inode->i_generation, (int __user *)arg);
1593 case XFS_IOC_FSGETXATTR:
1594 return xfs_ioc_fsgetxattr(ip, 0, arg);
1595 case XFS_IOC_FSGETXATTRA:
1596 return xfs_ioc_fsgetxattr(ip, 1, arg);
1597 case XFS_IOC_FSSETXATTR:
1598 return xfs_ioc_fssetxattr(ip, filp, arg);
1599 case XFS_IOC_GETXFLAGS:
1600 return xfs_ioc_getxflags(ip, arg);
1601 case XFS_IOC_SETXFLAGS:
1602 return xfs_ioc_setxflags(ip, filp, arg);
1604 case XFS_IOC_FSSETDM: {
1605 struct fsdmidata dmi;
1607 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1610 error = mnt_want_write_file(filp);
1614 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1616 mnt_drop_write_file(filp);
1620 case XFS_IOC_GETBMAP:
1621 case XFS_IOC_GETBMAPA:
1622 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1624 case XFS_IOC_GETBMAPX:
1625 return xfs_ioc_getbmapx(ip, arg);
1627 case XFS_IOC_FD_TO_HANDLE:
1628 case XFS_IOC_PATH_TO_HANDLE:
1629 case XFS_IOC_PATH_TO_FSHANDLE: {
1630 xfs_fsop_handlereq_t hreq;
1632 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1634 return xfs_find_handle(cmd, &hreq);
1636 case XFS_IOC_OPEN_BY_HANDLE: {
1637 xfs_fsop_handlereq_t hreq;
1639 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1641 return xfs_open_by_handle(filp, &hreq);
1643 case XFS_IOC_FSSETDM_BY_HANDLE:
1644 return xfs_fssetdm_by_handle(filp, arg);
1646 case XFS_IOC_READLINK_BY_HANDLE: {
1647 xfs_fsop_handlereq_t hreq;
1649 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1651 return xfs_readlink_by_handle(filp, &hreq);
1653 case XFS_IOC_ATTRLIST_BY_HANDLE:
1654 return xfs_attrlist_by_handle(filp, arg);
1656 case XFS_IOC_ATTRMULTI_BY_HANDLE:
1657 return xfs_attrmulti_by_handle(filp, arg);
1659 case XFS_IOC_SWAPEXT: {
1660 struct xfs_swapext sxp;
1662 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1664 error = mnt_want_write_file(filp);
1667 error = xfs_ioc_swapext(&sxp);
1668 mnt_drop_write_file(filp);
1672 case XFS_IOC_FSCOUNTS: {
1673 xfs_fsop_counts_t out;
1675 error = xfs_fs_counts(mp, &out);
1679 if (copy_to_user(arg, &out, sizeof(out)))
1684 case XFS_IOC_SET_RESBLKS: {
1685 xfs_fsop_resblks_t inout;
1688 if (!capable(CAP_SYS_ADMIN))
1691 if (mp->m_flags & XFS_MOUNT_RDONLY)
1694 if (copy_from_user(&inout, arg, sizeof(inout)))
1697 error = mnt_want_write_file(filp);
1701 /* input parameter is passed in resblks field of structure */
1703 error = xfs_reserve_blocks(mp, &in, &inout);
1704 mnt_drop_write_file(filp);
1708 if (copy_to_user(arg, &inout, sizeof(inout)))
1713 case XFS_IOC_GET_RESBLKS: {
1714 xfs_fsop_resblks_t out;
1716 if (!capable(CAP_SYS_ADMIN))
1719 error = xfs_reserve_blocks(mp, NULL, &out);
1723 if (copy_to_user(arg, &out, sizeof(out)))
1729 case XFS_IOC_FSGROWFSDATA: {
1730 xfs_growfs_data_t in;
1732 if (copy_from_user(&in, arg, sizeof(in)))
1735 error = mnt_want_write_file(filp);
1738 error = xfs_growfs_data(mp, &in);
1739 mnt_drop_write_file(filp);
1743 case XFS_IOC_FSGROWFSLOG: {
1744 xfs_growfs_log_t in;
1746 if (copy_from_user(&in, arg, sizeof(in)))
1749 error = mnt_want_write_file(filp);
1752 error = xfs_growfs_log(mp, &in);
1753 mnt_drop_write_file(filp);
1757 case XFS_IOC_FSGROWFSRT: {
1760 if (copy_from_user(&in, arg, sizeof(in)))
1763 error = mnt_want_write_file(filp);
1766 error = xfs_growfs_rt(mp, &in);
1767 mnt_drop_write_file(filp);
1771 case XFS_IOC_GOINGDOWN: {
1774 if (!capable(CAP_SYS_ADMIN))
1777 if (get_user(in, (__uint32_t __user *)arg))
1780 return xfs_fs_goingdown(mp, in);
1783 case XFS_IOC_ERROR_INJECTION: {
1784 xfs_error_injection_t in;
1786 if (!capable(CAP_SYS_ADMIN))
1789 if (copy_from_user(&in, arg, sizeof(in)))
1792 return xfs_errortag_add(in.errtag, mp);
1795 case XFS_IOC_ERROR_CLEARALL:
1796 if (!capable(CAP_SYS_ADMIN))
1799 return xfs_errortag_clearall(mp, 1);
1801 case XFS_IOC_FREE_EOFBLOCKS: {
1802 struct xfs_fs_eofblocks eofb;
1803 struct xfs_eofblocks keofb;
1805 if (!capable(CAP_SYS_ADMIN))
1808 if (mp->m_flags & XFS_MOUNT_RDONLY)
1811 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1814 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1818 return xfs_icache_free_eofblocks(mp, &keofb);