1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
8 #include "xfs_shared.h"
9 #include "xfs_format.h"
10 #include "xfs_log_format.h"
11 #include "xfs_trans_resv.h"
12 #include "xfs_mount.h"
13 #include "xfs_inode.h"
14 #include "xfs_ioctl.h"
15 #include "xfs_alloc.h"
16 #include "xfs_rtalloc.h"
17 #include "xfs_itable.h"
18 #include "xfs_error.h"
21 #include "xfs_bmap_util.h"
22 #include "xfs_fsops.h"
23 #include "xfs_discard.h"
24 #include "xfs_quota.h"
25 #include "xfs_export.h"
26 #include "xfs_trace.h"
27 #include "xfs_icache.h"
28 #include "xfs_symlink.h"
29 #include "xfs_trans.h"
31 #include "xfs_btree.h"
32 #include <linux/fsmap.h>
33 #include "xfs_fsmap.h"
34 #include "scrub/xfs_scrub.h"
37 #include <linux/capability.h>
38 #include <linux/cred.h>
39 #include <linux/dcache.h>
40 #include <linux/mount.h>
41 #include <linux/namei.h>
42 #include <linux/pagemap.h>
43 #include <linux/slab.h>
44 #include <linux/exportfs.h>
47 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
48 * a file or fs handle.
50 * XFS_IOC_PATH_TO_FSHANDLE
51 * returns fs handle for a mount point or path within that mount point
52 * XFS_IOC_FD_TO_HANDLE
53 * returns full handle for a FD opened in user space
54 * XFS_IOC_PATH_TO_HANDLE
55 * returns full handle for a path
60 xfs_fsop_handlereq_t *hreq)
70 if (cmd == XFS_IOC_FD_TO_HANDLE) {
74 inode = file_inode(f.file);
76 error = user_lpath((const char __user *)hreq->path, &path);
79 inode = d_inode(path.dentry);
84 * We can only generate handles for inodes residing on a XFS filesystem,
85 * and only for regular files, directories or symbolic links.
88 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
92 if (!S_ISREG(inode->i_mode) &&
93 !S_ISDIR(inode->i_mode) &&
94 !S_ISLNK(inode->i_mode))
98 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
100 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
102 * This handle only contains an fsid, zero the rest.
104 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
105 hsize = sizeof(xfs_fsid_t);
107 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
108 sizeof(handle.ha_fid.fid_len);
109 handle.ha_fid.fid_pad = 0;
110 handle.ha_fid.fid_gen = inode->i_generation;
111 handle.ha_fid.fid_ino = ip->i_ino;
112 hsize = sizeof(xfs_handle_t);
116 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
117 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
123 if (cmd == XFS_IOC_FD_TO_HANDLE)
131 * No need to do permission checks on the various pathname components
132 * as the handle operations are privileged.
135 xfs_handle_acceptable(
137 struct dentry *dentry)
143 * Convert userspace handle data into a dentry.
146 xfs_handle_to_dentry(
147 struct file *parfilp,
148 void __user *uhandle,
152 struct xfs_fid64 fid;
155 * Only allow handle opens under a directory.
157 if (!S_ISDIR(file_inode(parfilp)->i_mode))
158 return ERR_PTR(-ENOTDIR);
160 if (hlen != sizeof(xfs_handle_t))
161 return ERR_PTR(-EINVAL);
162 if (copy_from_user(&handle, uhandle, hlen))
163 return ERR_PTR(-EFAULT);
164 if (handle.ha_fid.fid_len !=
165 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
166 return ERR_PTR(-EINVAL);
168 memset(&fid, 0, sizeof(struct fid));
169 fid.ino = handle.ha_fid.fid_ino;
170 fid.gen = handle.ha_fid.fid_gen;
172 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
173 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
174 xfs_handle_acceptable, NULL);
177 STATIC struct dentry *
178 xfs_handlereq_to_dentry(
179 struct file *parfilp,
180 xfs_fsop_handlereq_t *hreq)
182 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
187 struct file *parfilp,
188 xfs_fsop_handlereq_t *hreq)
190 const struct cred *cred = current_cred();
196 struct dentry *dentry;
200 if (!capable(CAP_SYS_ADMIN))
203 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
205 return PTR_ERR(dentry);
206 inode = d_inode(dentry);
208 /* Restrict xfs_open_by_handle to directories & regular files. */
209 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
214 #if BITS_PER_LONG != 32
215 hreq->oflags |= O_LARGEFILE;
218 permflag = hreq->oflags;
219 fmode = OPEN_FMODE(permflag);
220 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
221 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
226 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
231 /* Can't write directories. */
232 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
237 fd = get_unused_fd_flags(0);
243 path.mnt = parfilp->f_path.mnt;
244 path.dentry = dentry;
245 filp = dentry_open(&path, hreq->oflags, cred);
249 return PTR_ERR(filp);
252 if (S_ISREG(inode->i_mode)) {
253 filp->f_flags |= O_NOATIME;
254 filp->f_mode |= FMODE_NOCMTIME;
257 fd_install(fd, filp);
266 xfs_readlink_by_handle(
267 struct file *parfilp,
268 xfs_fsop_handlereq_t *hreq)
270 struct dentry *dentry;
274 if (!capable(CAP_SYS_ADMIN))
277 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
279 return PTR_ERR(dentry);
281 /* Restrict this handle operation to symlinks only. */
282 if (!d_is_symlink(dentry)) {
287 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
292 error = vfs_readlink(dentry, hreq->ohandle, olen);
305 xfs_mount_t *mp = ip->i_mount;
309 if (!capable(CAP_SYS_ADMIN))
312 if (XFS_FORCED_SHUTDOWN(mp))
315 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
319 xfs_ilock(ip, XFS_ILOCK_EXCL);
320 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
322 ip->i_d.di_dmevmask = evmask;
323 ip->i_d.di_dmstate = state;
325 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
326 error = xfs_trans_commit(tp);
332 xfs_fssetdm_by_handle(
333 struct file *parfilp,
337 struct fsdmidata fsd;
338 xfs_fsop_setdm_handlereq_t dmhreq;
339 struct dentry *dentry;
341 if (!capable(CAP_MKNOD))
343 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
346 error = mnt_want_write_file(parfilp);
350 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
351 if (IS_ERR(dentry)) {
352 mnt_drop_write_file(parfilp);
353 return PTR_ERR(dentry);
356 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
361 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
366 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
370 mnt_drop_write_file(parfilp);
376 xfs_attrlist_by_handle(
377 struct file *parfilp,
381 attrlist_cursor_kern_t *cursor;
382 struct xfs_fsop_attrlist_handlereq __user *p = arg;
383 xfs_fsop_attrlist_handlereq_t al_hreq;
384 struct dentry *dentry;
387 if (!capable(CAP_SYS_ADMIN))
389 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
391 if (al_hreq.buflen < sizeof(struct attrlist) ||
392 al_hreq.buflen > XFS_XATTR_LIST_MAX)
396 * Reject flags, only allow namespaces.
398 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
401 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
403 return PTR_ERR(dentry);
405 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
409 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
410 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
411 al_hreq.flags, cursor);
415 if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
420 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
431 xfs_attrmulti_attr_get(
434 unsigned char __user *ubuf,
441 if (*len > XFS_XATTR_SIZE_MAX)
443 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
447 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
451 if (copy_to_user(ubuf, kbuf, *len))
460 xfs_attrmulti_attr_set(
463 const unsigned char __user *ubuf,
470 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
472 if (len > XFS_XATTR_SIZE_MAX)
475 kbuf = memdup_user(ubuf, len);
477 return PTR_ERR(kbuf);
479 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
481 xfs_forget_acl(inode, name, flags);
487 xfs_attrmulti_attr_remove(
494 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
496 error = xfs_attr_remove(XFS_I(inode), name, flags);
498 xfs_forget_acl(inode, name, flags);
503 xfs_attrmulti_by_handle(
504 struct file *parfilp,
508 xfs_attr_multiop_t *ops;
509 xfs_fsop_attrmulti_handlereq_t am_hreq;
510 struct dentry *dentry;
511 unsigned int i, size;
512 unsigned char *attr_name;
514 if (!capable(CAP_SYS_ADMIN))
516 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
520 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
523 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
525 return PTR_ERR(dentry);
528 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
529 if (!size || size > 16 * PAGE_SIZE)
532 ops = memdup_user(am_hreq.ops, size);
534 error = PTR_ERR(ops);
539 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
544 for (i = 0; i < am_hreq.opcount; i++) {
545 ops[i].am_error = strncpy_from_user((char *)attr_name,
546 ops[i].am_attrname, MAXNAMELEN);
547 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
549 if (ops[i].am_error < 0)
552 switch (ops[i].am_opcode) {
554 ops[i].am_error = xfs_attrmulti_attr_get(
555 d_inode(dentry), attr_name,
556 ops[i].am_attrvalue, &ops[i].am_length,
560 ops[i].am_error = mnt_want_write_file(parfilp);
563 ops[i].am_error = xfs_attrmulti_attr_set(
564 d_inode(dentry), attr_name,
565 ops[i].am_attrvalue, ops[i].am_length,
567 mnt_drop_write_file(parfilp);
570 ops[i].am_error = mnt_want_write_file(parfilp);
573 ops[i].am_error = xfs_attrmulti_attr_remove(
574 d_inode(dentry), attr_name,
576 mnt_drop_write_file(parfilp);
579 ops[i].am_error = -EINVAL;
583 if (copy_to_user(am_hreq.ops, ops, size))
600 struct inode *inode = file_inode(filp);
601 struct xfs_inode *ip = XFS_I(inode);
603 enum xfs_prealloc_flags flags = 0;
604 uint iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL;
608 * Only allow the sys admin to reserve space unless
609 * unwritten extents are enabled.
611 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
612 !capable(CAP_SYS_ADMIN))
615 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
618 if (!(filp->f_mode & FMODE_WRITE))
621 if (!S_ISREG(inode->i_mode))
624 if (filp->f_flags & O_DSYNC)
625 flags |= XFS_PREALLOC_SYNC;
626 if (filp->f_mode & FMODE_NOCMTIME)
627 flags |= XFS_PREALLOC_INVISIBLE;
629 error = mnt_want_write_file(filp);
633 xfs_ilock(ip, iolock);
634 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP);
638 switch (bf->l_whence) {
642 bf->l_start += filp->f_pos;
645 bf->l_start += XFS_ISIZE(ip);
653 * length of <= 0 for resv/unresv/zero is invalid. length for
654 * alloc/free is ignored completely and we have no idea what userspace
655 * might have set it to, so set it to zero to allow range
659 case XFS_IOC_ZERO_RANGE:
661 case XFS_IOC_RESVSP64:
662 case XFS_IOC_UNRESVSP:
663 case XFS_IOC_UNRESVSP64:
664 if (bf->l_len <= 0) {
674 if (bf->l_start < 0 ||
675 bf->l_start > inode->i_sb->s_maxbytes ||
676 bf->l_start + bf->l_len < 0 ||
677 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
683 case XFS_IOC_ZERO_RANGE:
684 flags |= XFS_PREALLOC_SET;
685 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
688 case XFS_IOC_RESVSP64:
689 flags |= XFS_PREALLOC_SET;
690 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
693 case XFS_IOC_UNRESVSP:
694 case XFS_IOC_UNRESVSP64:
695 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
697 case XFS_IOC_ALLOCSP:
698 case XFS_IOC_ALLOCSP64:
700 case XFS_IOC_FREESP64:
701 flags |= XFS_PREALLOC_CLEAR;
702 if (bf->l_start > XFS_ISIZE(ip)) {
703 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
704 bf->l_start - XFS_ISIZE(ip), 0);
709 iattr.ia_valid = ATTR_SIZE;
710 iattr.ia_size = bf->l_start;
712 error = xfs_vn_setattr_size(file_dentry(filp), &iattr);
722 error = xfs_update_prealloc_flags(ip, flags);
725 xfs_iunlock(ip, iolock);
726 mnt_drop_write_file(filp);
736 xfs_fsop_bulkreq_t bulkreq;
737 int count; /* # of records returned */
738 xfs_ino_t inlast; /* last inode number */
742 /* done = 1 if there are more stats to get and if bulkstat */
743 /* should be called again (unused here, but used in dmapi) */
745 if (!capable(CAP_SYS_ADMIN))
748 if (XFS_FORCED_SHUTDOWN(mp))
751 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
754 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
757 if ((count = bulkreq.icount) <= 0)
760 if (bulkreq.ubuffer == NULL)
763 if (cmd == XFS_IOC_FSINUMBERS)
764 error = xfs_inumbers(mp, &inlast, &count,
765 bulkreq.ubuffer, xfs_inumbers_fmt);
766 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
767 error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
768 sizeof(xfs_bstat_t), NULL, &done);
769 else /* XFS_IOC_FSBULKSTAT */
770 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
771 sizeof(xfs_bstat_t), bulkreq.ubuffer,
777 if (bulkreq.ocount != NULL) {
778 if (copy_to_user(bulkreq.lastip, &inlast,
782 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
790 xfs_ioc_fsgeometry_v1(
794 xfs_fsop_geom_t fsgeo;
797 error = xfs_fs_geometry(&mp->m_sb, &fsgeo, 3);
802 * Caller should have passed an argument of type
803 * xfs_fsop_geom_v1_t. This is a proper subset of the
804 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
806 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
816 xfs_fsop_geom_t fsgeo;
819 error = xfs_fs_geometry(&mp->m_sb, &fsgeo, 4);
823 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
829 * Linux extended inode flags interface.
833 xfs_merge_ioc_xflags(
837 unsigned int xflags = start;
839 if (flags & FS_IMMUTABLE_FL)
840 xflags |= FS_XFLAG_IMMUTABLE;
842 xflags &= ~FS_XFLAG_IMMUTABLE;
843 if (flags & FS_APPEND_FL)
844 xflags |= FS_XFLAG_APPEND;
846 xflags &= ~FS_XFLAG_APPEND;
847 if (flags & FS_SYNC_FL)
848 xflags |= FS_XFLAG_SYNC;
850 xflags &= ~FS_XFLAG_SYNC;
851 if (flags & FS_NOATIME_FL)
852 xflags |= FS_XFLAG_NOATIME;
854 xflags &= ~FS_XFLAG_NOATIME;
855 if (flags & FS_NODUMP_FL)
856 xflags |= FS_XFLAG_NODUMP;
858 xflags &= ~FS_XFLAG_NODUMP;
867 unsigned int flags = 0;
869 if (di_flags & XFS_DIFLAG_IMMUTABLE)
870 flags |= FS_IMMUTABLE_FL;
871 if (di_flags & XFS_DIFLAG_APPEND)
872 flags |= FS_APPEND_FL;
873 if (di_flags & XFS_DIFLAG_SYNC)
875 if (di_flags & XFS_DIFLAG_NOATIME)
876 flags |= FS_NOATIME_FL;
877 if (di_flags & XFS_DIFLAG_NODUMP)
878 flags |= FS_NODUMP_FL;
890 memset(&fa, 0, sizeof(struct fsxattr));
892 xfs_ilock(ip, XFS_ILOCK_SHARED);
893 fa.fsx_xflags = xfs_ip2xflags(ip);
894 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
895 fa.fsx_cowextsize = ip->i_d.di_cowextsize <<
896 ip->i_mount->m_sb.sb_blocklog;
897 fa.fsx_projid = xfs_get_projid(ip);
901 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
902 fa.fsx_nextents = xfs_iext_count(ip->i_afp);
904 fa.fsx_nextents = ip->i_d.di_anextents;
908 if (ip->i_df.if_flags & XFS_IFEXTENTS)
909 fa.fsx_nextents = xfs_iext_count(&ip->i_df);
911 fa.fsx_nextents = ip->i_d.di_nextents;
913 xfs_iunlock(ip, XFS_ILOCK_SHARED);
915 if (copy_to_user(arg, &fa, sizeof(fa)))
922 struct xfs_inode *ip,
925 /* can't set PREALLOC this way, just preserve it */
927 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
929 if (xflags & FS_XFLAG_IMMUTABLE)
930 di_flags |= XFS_DIFLAG_IMMUTABLE;
931 if (xflags & FS_XFLAG_APPEND)
932 di_flags |= XFS_DIFLAG_APPEND;
933 if (xflags & FS_XFLAG_SYNC)
934 di_flags |= XFS_DIFLAG_SYNC;
935 if (xflags & FS_XFLAG_NOATIME)
936 di_flags |= XFS_DIFLAG_NOATIME;
937 if (xflags & FS_XFLAG_NODUMP)
938 di_flags |= XFS_DIFLAG_NODUMP;
939 if (xflags & FS_XFLAG_NODEFRAG)
940 di_flags |= XFS_DIFLAG_NODEFRAG;
941 if (xflags & FS_XFLAG_FILESTREAM)
942 di_flags |= XFS_DIFLAG_FILESTREAM;
943 if (S_ISDIR(VFS_I(ip)->i_mode)) {
944 if (xflags & FS_XFLAG_RTINHERIT)
945 di_flags |= XFS_DIFLAG_RTINHERIT;
946 if (xflags & FS_XFLAG_NOSYMLINKS)
947 di_flags |= XFS_DIFLAG_NOSYMLINKS;
948 if (xflags & FS_XFLAG_EXTSZINHERIT)
949 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
950 if (xflags & FS_XFLAG_PROJINHERIT)
951 di_flags |= XFS_DIFLAG_PROJINHERIT;
952 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
953 if (xflags & FS_XFLAG_REALTIME)
954 di_flags |= XFS_DIFLAG_REALTIME;
955 if (xflags & FS_XFLAG_EXTSIZE)
956 di_flags |= XFS_DIFLAG_EXTSIZE;
964 struct xfs_inode *ip,
968 (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
970 if (xflags & FS_XFLAG_DAX)
971 di_flags2 |= XFS_DIFLAG2_DAX;
972 if (xflags & FS_XFLAG_COWEXTSIZE)
973 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
979 xfs_diflags_to_linux(
980 struct xfs_inode *ip)
982 struct inode *inode = VFS_I(ip);
983 unsigned int xflags = xfs_ip2xflags(ip);
985 if (xflags & FS_XFLAG_IMMUTABLE)
986 inode->i_flags |= S_IMMUTABLE;
988 inode->i_flags &= ~S_IMMUTABLE;
989 if (xflags & FS_XFLAG_APPEND)
990 inode->i_flags |= S_APPEND;
992 inode->i_flags &= ~S_APPEND;
993 if (xflags & FS_XFLAG_SYNC)
994 inode->i_flags |= S_SYNC;
996 inode->i_flags &= ~S_SYNC;
997 if (xflags & FS_XFLAG_NOATIME)
998 inode->i_flags |= S_NOATIME;
1000 inode->i_flags &= ~S_NOATIME;
1001 #if 0 /* disabled until the flag switching races are sorted out */
1002 if (xflags & FS_XFLAG_DAX)
1003 inode->i_flags |= S_DAX;
1005 inode->i_flags &= ~S_DAX;
1010 xfs_ioctl_setattr_xflags(
1011 struct xfs_trans *tp,
1012 struct xfs_inode *ip,
1015 struct xfs_mount *mp = ip->i_mount;
1018 /* Can't change realtime flag if any extents are allocated. */
1019 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1020 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1023 /* If realtime flag is set then must have realtime device */
1024 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1025 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1026 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1030 /* Clear reflink if we are actually able to set the rt flag. */
1031 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1032 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
1034 /* Don't allow us to set DAX mode for a reflinked file for now. */
1035 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
1039 * Can't modify an immutable/append-only file unless
1040 * we have appropriate permission.
1042 if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
1043 (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
1044 !capable(CAP_LINUX_IMMUTABLE))
1047 /* diflags2 only valid for v3 inodes. */
1048 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1049 if (di_flags2 && ip->i_d.di_version < 3)
1052 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags);
1053 ip->i_d.di_flags2 = di_flags2;
1055 xfs_diflags_to_linux(ip);
1056 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1057 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1058 XFS_STATS_INC(mp, xs_ig_attrchg);
1063 * If we are changing DAX flags, we have to ensure the file is clean and any
1064 * cached objects in the address space are invalidated and removed. This
1065 * requires us to lock out other IO and page faults similar to a truncate
1066 * operation. The locks need to be held until the transaction has been committed
1067 * so that the cache invalidation is atomic with respect to the DAX flag
1071 xfs_ioctl_setattr_dax_invalidate(
1072 struct xfs_inode *ip,
1076 struct inode *inode = VFS_I(ip);
1077 struct super_block *sb = inode->i_sb;
1083 * It is only valid to set the DAX flag on regular files and
1084 * directories on filesystems where the block size is equal to the page
1085 * size. On directories it serves as an inherited hint so we don't
1086 * have to check the device for dax support or flush pagecache.
1088 if (fa->fsx_xflags & FS_XFLAG_DAX) {
1089 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
1091 if (S_ISREG(inode->i_mode) &&
1092 !bdev_dax_supported(xfs_find_bdev_for_inode(VFS_I(ip)),
1097 /* If the DAX state is not changing, we have nothing to do here. */
1098 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1100 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1103 if (S_ISDIR(inode->i_mode))
1106 /* lock, flush and invalidate mapping in preparation for flag change */
1107 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1108 error = filemap_write_and_wait(inode->i_mapping);
1111 error = invalidate_inode_pages2(inode->i_mapping);
1115 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1119 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1125 * Set up the transaction structure for the setattr operation, checking that we
1126 * have permission to do so. On success, return a clean transaction and the
1127 * inode locked exclusively ready for further operation specific checks. On
1128 * failure, return an error without modifying or locking the inode.
1130 * The inode might already be IO locked on call. If this is the case, it is
1131 * indicated in @join_flags and we take full responsibility for ensuring they
1132 * are unlocked from now on. Hence if we have an error here, we still have to
1133 * unlock them. Otherwise, once they are joined to the transaction, they will
1134 * be unlocked on commit/cancel.
1136 static struct xfs_trans *
1137 xfs_ioctl_setattr_get_trans(
1138 struct xfs_inode *ip,
1141 struct xfs_mount *mp = ip->i_mount;
1142 struct xfs_trans *tp;
1145 if (mp->m_flags & XFS_MOUNT_RDONLY)
1148 if (XFS_FORCED_SHUTDOWN(mp))
1151 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1153 return ERR_PTR(error);
1155 xfs_ilock(ip, XFS_ILOCK_EXCL);
1156 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1160 * CAP_FOWNER overrides the following restrictions:
1162 * The user ID of the calling process must be equal to the file owner
1163 * ID, except in cases where the CAP_FSETID capability is applicable.
1165 if (!inode_owner_or_capable(VFS_I(ip))) {
1170 if (mp->m_flags & XFS_MOUNT_WSYNC)
1171 xfs_trans_set_sync(tp);
1176 xfs_trans_cancel(tp);
1179 xfs_iunlock(ip, join_flags);
1180 return ERR_PTR(error);
1184 * extent size hint validation is somewhat cumbersome. Rules are:
1186 * 1. extent size hint is only valid for directories and regular files
1187 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1188 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1189 * 4. can only be changed on regular files if no extents are allocated
1190 * 5. can be changed on directories at any time
1191 * 6. extsize hint of 0 turns off hints, clears inode flags.
1192 * 7. Extent size must be a multiple of the appropriate block size.
1193 * 8. for non-realtime files, the extent size hint must be limited
1194 * to half the AG size to avoid alignment extending the extent beyond the
1197 * Please keep this function in sync with xfs_scrub_inode_extsize.
1200 xfs_ioctl_setattr_check_extsize(
1201 struct xfs_inode *ip,
1204 struct xfs_mount *mp = ip->i_mount;
1206 if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
1209 if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
1210 !S_ISDIR(VFS_I(ip)->i_mode))
1213 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1214 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1217 if (fa->fsx_extsize != 0) {
1219 xfs_fsblock_t extsize_fsb;
1221 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1222 if (extsize_fsb > MAXEXTLEN)
1225 if (XFS_IS_REALTIME_INODE(ip) ||
1226 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1227 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1229 size = mp->m_sb.sb_blocksize;
1230 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1234 if (fa->fsx_extsize % size)
1237 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
1243 * CoW extent size hint validation rules are:
1245 * 1. CoW extent size hint can only be set if reflink is enabled on the fs.
1246 * The inode does not have to have any shared blocks, but it must be a v3.
1247 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
1248 * for a directory, the hint is propagated to new files.
1249 * 3. Can be changed on files & directories at any time.
1250 * 4. CoW extsize hint of 0 turns off hints, clears inode flags.
1251 * 5. Extent size must be a multiple of the appropriate block size.
1252 * 6. The extent size hint must be limited to half the AG size to avoid
1253 * alignment extending the extent beyond the limits of the AG.
1255 * Please keep this function in sync with xfs_scrub_inode_cowextsize.
1258 xfs_ioctl_setattr_check_cowextsize(
1259 struct xfs_inode *ip,
1262 struct xfs_mount *mp = ip->i_mount;
1264 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
1267 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) ||
1268 ip->i_d.di_version != 3)
1271 if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode))
1274 if (fa->fsx_cowextsize != 0) {
1276 xfs_fsblock_t cowextsize_fsb;
1278 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1279 if (cowextsize_fsb > MAXEXTLEN)
1282 size = mp->m_sb.sb_blocksize;
1283 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
1286 if (fa->fsx_cowextsize % size)
1289 fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;
1295 xfs_ioctl_setattr_check_projid(
1296 struct xfs_inode *ip,
1299 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1300 if (fa->fsx_projid > (uint16_t)-1 &&
1301 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1305 * Project Quota ID state is only allowed to change from within the init
1306 * namespace. Enforce that restriction only if we are trying to change
1307 * the quota ID state. Everything else is allowed in user namespaces.
1309 if (current_user_ns() == &init_user_ns)
1312 if (xfs_get_projid(ip) != fa->fsx_projid)
1314 if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
1315 (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
1326 struct xfs_mount *mp = ip->i_mount;
1327 struct xfs_trans *tp;
1328 struct xfs_dquot *udqp = NULL;
1329 struct xfs_dquot *pdqp = NULL;
1330 struct xfs_dquot *olddquot = NULL;
1334 trace_xfs_ioctl_setattr(ip);
1336 code = xfs_ioctl_setattr_check_projid(ip, fa);
1341 * If disk quotas is on, we make sure that the dquots do exist on disk,
1342 * before we start any other transactions. Trying to do this later
1343 * is messy. We don't care to take a readlock to look at the ids
1344 * in inode here, because we can't hold it across the trans_reserve.
1345 * If the IDs do change before we take the ilock, we're covered
1346 * because the i_*dquot fields will get updated anyway.
1348 if (XFS_IS_QUOTA_ON(mp)) {
1349 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1350 ip->i_d.di_gid, fa->fsx_projid,
1351 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1357 * Changing DAX config may require inode locking for mapping
1358 * invalidation. These need to be held all the way to transaction commit
1359 * or cancel time, so need to be passed through to
1360 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1363 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1365 goto error_free_dquots;
1367 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1370 goto error_free_dquots;
1374 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1375 xfs_get_projid(ip) != fa->fsx_projid) {
1376 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1377 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1378 if (code) /* out of quota */
1379 goto error_trans_cancel;
1382 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1384 goto error_trans_cancel;
1386 code = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1388 goto error_trans_cancel;
1390 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1392 goto error_trans_cancel;
1395 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1396 * overrides the following restrictions:
1398 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1399 * successful return from chown()
1402 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1403 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1404 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1406 /* Change the ownerships and register project quota modifications */
1407 if (xfs_get_projid(ip) != fa->fsx_projid) {
1408 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1409 olddquot = xfs_qm_vop_chown(tp, ip,
1410 &ip->i_pdquot, pdqp);
1412 ASSERT(ip->i_d.di_version > 1);
1413 xfs_set_projid(ip, fa->fsx_projid);
1417 * Only set the extent size hint if we've already determined that the
1418 * extent size hint should be set on the inode. If no extent size flags
1419 * are set on the inode then unconditionally clear the extent size hint.
1421 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1422 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1424 ip->i_d.di_extsize = 0;
1425 if (ip->i_d.di_version == 3 &&
1426 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
1427 ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
1428 mp->m_sb.sb_blocklog;
1430 ip->i_d.di_cowextsize = 0;
1432 code = xfs_trans_commit(tp);
1435 * Release any dquot(s) the inode had kept before chown.
1437 xfs_qm_dqrele(olddquot);
1438 xfs_qm_dqrele(udqp);
1439 xfs_qm_dqrele(pdqp);
1444 xfs_trans_cancel(tp);
1446 xfs_qm_dqrele(udqp);
1447 xfs_qm_dqrele(pdqp);
1460 if (copy_from_user(&fa, arg, sizeof(fa)))
1463 error = mnt_want_write_file(filp);
1466 error = xfs_ioctl_setattr(ip, &fa);
1467 mnt_drop_write_file(filp);
1478 flags = xfs_di2lxflags(ip->i_d.di_flags);
1479 if (copy_to_user(arg, &flags, sizeof(flags)))
1486 struct xfs_inode *ip,
1490 struct xfs_trans *tp;
1496 if (copy_from_user(&flags, arg, sizeof(flags)))
1499 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1500 FS_NOATIME_FL | FS_NODUMP_FL | \
1504 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1506 error = mnt_want_write_file(filp);
1511 * Changing DAX config may require inode locking for mapping
1512 * invalidation. These need to be held all the way to transaction commit
1513 * or cancel time, so need to be passed through to
1514 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1517 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1519 goto out_drop_write;
1521 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1523 error = PTR_ERR(tp);
1524 goto out_drop_write;
1527 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1529 xfs_trans_cancel(tp);
1530 goto out_drop_write;
1533 error = xfs_trans_commit(tp);
1535 mnt_drop_write_file(filp);
1542 struct getbmapx __user *u,
1545 if (put_user(p->bmv_offset, &u->bmv_offset) ||
1546 put_user(p->bmv_block, &u->bmv_block) ||
1547 put_user(p->bmv_length, &u->bmv_length) ||
1548 put_user(0, &u->bmv_count) ||
1549 put_user(0, &u->bmv_entries))
1551 if (recsize < sizeof(struct getbmapx))
1553 if (put_user(0, &u->bmv_iflags) ||
1554 put_user(p->bmv_oflags, &u->bmv_oflags) ||
1555 put_user(0, &u->bmv_unused1) ||
1556 put_user(0, &u->bmv_unused2))
1567 struct getbmapx bmx = { 0 };
1568 struct kgetbmap *buf;
1573 case XFS_IOC_GETBMAPA:
1574 bmx.bmv_iflags = BMV_IF_ATTRFORK;
1576 case XFS_IOC_GETBMAP:
1577 if (file->f_mode & FMODE_NOCMTIME)
1578 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1579 /* struct getbmap is a strict subset of struct getbmapx. */
1580 recsize = sizeof(struct getbmap);
1582 case XFS_IOC_GETBMAPX:
1583 recsize = sizeof(struct getbmapx);
1589 if (copy_from_user(&bmx, arg, recsize))
1592 if (bmx.bmv_count < 2)
1594 if (bmx.bmv_count > ULONG_MAX / recsize)
1597 buf = kmem_zalloc_large(bmx.bmv_count * sizeof(*buf), 0);
1601 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
1606 if (copy_to_user(arg, &bmx, recsize))
1610 for (i = 0; i < bmx.bmv_entries; i++) {
1611 if (!xfs_getbmap_format(buf + i, arg, recsize))
1622 struct getfsmap_info {
1623 struct xfs_mount *mp;
1624 struct fsmap_head __user *data;
1630 xfs_getfsmap_format(struct xfs_fsmap *xfm, void *priv)
1632 struct getfsmap_info *info = priv;
1635 trace_xfs_getfsmap_mapping(info->mp, xfm);
1637 info->last_flags = xfm->fmr_flags;
1638 xfs_fsmap_from_internal(&fm, xfm);
1639 if (copy_to_user(&info->data->fmh_recs[info->idx++], &fm,
1640 sizeof(struct fsmap)))
1648 struct xfs_inode *ip,
1649 struct fsmap_head __user *arg)
1651 struct getfsmap_info info = { NULL };
1652 struct xfs_fsmap_head xhead = {0};
1653 struct fsmap_head head;
1654 bool aborted = false;
1657 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1659 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1660 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1661 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1662 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1663 sizeof(head.fmh_keys[1].fmr_reserved)))
1666 xhead.fmh_iflags = head.fmh_iflags;
1667 xhead.fmh_count = head.fmh_count;
1668 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1669 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1671 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1672 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1674 info.mp = ip->i_mount;
1676 error = xfs_getfsmap(ip->i_mount, &xhead, xfs_getfsmap_format, &info);
1677 if (error == XFS_BTREE_QUERY_RANGE_ABORT) {
1683 /* If we didn't abort, set the "last" flag in the last fmx */
1684 if (!aborted && info.idx) {
1685 info.last_flags |= FMR_OF_LAST;
1686 if (copy_to_user(&info.data->fmh_recs[info.idx - 1].fmr_flags,
1687 &info.last_flags, sizeof(info.last_flags)))
1691 /* copy back header */
1692 head.fmh_entries = xhead.fmh_entries;
1693 head.fmh_oflags = xhead.fmh_oflags;
1694 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
1701 xfs_ioc_scrub_metadata(
1702 struct xfs_inode *ip,
1705 struct xfs_scrub_metadata scrub;
1708 if (!capable(CAP_SYS_ADMIN))
1711 if (copy_from_user(&scrub, arg, sizeof(scrub)))
1714 error = xfs_scrub_metadata(ip, &scrub);
1718 if (copy_to_user(arg, &scrub, sizeof(scrub)))
1728 xfs_inode_t *ip, *tip;
1732 /* Pull information for the target fd */
1733 f = fdget((int)sxp->sx_fdtarget);
1739 if (!(f.file->f_mode & FMODE_WRITE) ||
1740 !(f.file->f_mode & FMODE_READ) ||
1741 (f.file->f_flags & O_APPEND)) {
1746 tmp = fdget((int)sxp->sx_fdtmp);
1752 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1753 !(tmp.file->f_mode & FMODE_READ) ||
1754 (tmp.file->f_flags & O_APPEND)) {
1756 goto out_put_tmp_file;
1759 if (IS_SWAPFILE(file_inode(f.file)) ||
1760 IS_SWAPFILE(file_inode(tmp.file))) {
1762 goto out_put_tmp_file;
1766 * We need to ensure that the fds passed in point to XFS inodes
1767 * before we cast and access them as XFS structures as we have no
1768 * control over what the user passes us here.
1770 if (f.file->f_op != &xfs_file_operations ||
1771 tmp.file->f_op != &xfs_file_operations) {
1773 goto out_put_tmp_file;
1776 ip = XFS_I(file_inode(f.file));
1777 tip = XFS_I(file_inode(tmp.file));
1779 if (ip->i_mount != tip->i_mount) {
1781 goto out_put_tmp_file;
1784 if (ip->i_ino == tip->i_ino) {
1786 goto out_put_tmp_file;
1789 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1791 goto out_put_tmp_file;
1794 error = xfs_swap_extents(ip, tip, sxp);
1806 struct xfs_mount *mp,
1807 char __user *user_label)
1809 struct xfs_sb *sbp = &mp->m_sb;
1810 char label[XFSLABEL_MAX + 1];
1813 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
1815 /* 1 larger than sb_fname, so this ensures a trailing NUL char */
1816 memset(label, 0, sizeof(label));
1817 spin_lock(&mp->m_sb_lock);
1818 strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
1819 spin_unlock(&mp->m_sb_lock);
1821 if (copy_to_user(user_label, label, sizeof(label)))
1829 struct xfs_mount *mp,
1830 char __user *newlabel)
1832 struct xfs_sb *sbp = &mp->m_sb;
1833 char label[XFSLABEL_MAX + 1];
1837 if (!capable(CAP_SYS_ADMIN))
1840 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
1841 * smaller, at 12 bytes. We copy one more to be sure we find the
1842 * (required) NULL character to test the incoming label length.
1843 * NB: The on disk label doesn't need to be null terminated.
1845 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
1847 len = strnlen(label, XFSLABEL_MAX + 1);
1848 if (len > sizeof(sbp->sb_fname))
1851 error = mnt_want_write_file(filp);
1855 spin_lock(&mp->m_sb_lock);
1856 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
1857 memcpy(sbp->sb_fname, label, len);
1858 spin_unlock(&mp->m_sb_lock);
1861 * Now we do several things to satisfy userspace.
1862 * In addition to normal logging of the primary superblock, we also
1863 * immediately write these changes to sector zero for the primary, then
1864 * update all backup supers (as xfs_db does for a label change), then
1865 * invalidate the block device page cache. This is so that any prior
1866 * buffered reads from userspace (i.e. from blkid) are invalidated,
1867 * and userspace will see the newly-written label.
1869 error = xfs_sync_sb_buf(mp);
1873 * growfs also updates backup supers so lock against that.
1875 mutex_lock(&mp->m_growlock);
1876 error = xfs_update_secondary_sbs(mp);
1877 mutex_unlock(&mp->m_growlock);
1879 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
1882 mnt_drop_write_file(filp);
1887 * Note: some of the ioctl's return positive numbers as a
1888 * byte count indicating success, such as readlink_by_handle.
1889 * So we don't "sign flip" like most other routines. This means
1890 * true errors need to be returned as a negative value.
1898 struct inode *inode = file_inode(filp);
1899 struct xfs_inode *ip = XFS_I(inode);
1900 struct xfs_mount *mp = ip->i_mount;
1901 void __user *arg = (void __user *)p;
1904 trace_xfs_file_ioctl(ip);
1908 return xfs_ioc_trim(mp, arg);
1909 case FS_IOC_GETFSLABEL:
1910 return xfs_ioc_getlabel(mp, arg);
1911 case FS_IOC_SETFSLABEL:
1912 return xfs_ioc_setlabel(filp, mp, arg);
1913 case XFS_IOC_ALLOCSP:
1914 case XFS_IOC_FREESP:
1915 case XFS_IOC_RESVSP:
1916 case XFS_IOC_UNRESVSP:
1917 case XFS_IOC_ALLOCSP64:
1918 case XFS_IOC_FREESP64:
1919 case XFS_IOC_RESVSP64:
1920 case XFS_IOC_UNRESVSP64:
1921 case XFS_IOC_ZERO_RANGE: {
1924 if (copy_from_user(&bf, arg, sizeof(bf)))
1926 return xfs_ioc_space(filp, cmd, &bf);
1928 case XFS_IOC_DIOINFO: {
1930 xfs_buftarg_t *target =
1931 XFS_IS_REALTIME_INODE(ip) ?
1932 mp->m_rtdev_targp : mp->m_ddev_targp;
1934 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
1935 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1937 if (copy_to_user(arg, &da, sizeof(da)))
1942 case XFS_IOC_FSBULKSTAT_SINGLE:
1943 case XFS_IOC_FSBULKSTAT:
1944 case XFS_IOC_FSINUMBERS:
1945 return xfs_ioc_bulkstat(mp, cmd, arg);
1947 case XFS_IOC_FSGEOMETRY_V1:
1948 return xfs_ioc_fsgeometry_v1(mp, arg);
1950 case XFS_IOC_FSGEOMETRY:
1951 return xfs_ioc_fsgeometry(mp, arg);
1953 case XFS_IOC_GETVERSION:
1954 return put_user(inode->i_generation, (int __user *)arg);
1956 case XFS_IOC_FSGETXATTR:
1957 return xfs_ioc_fsgetxattr(ip, 0, arg);
1958 case XFS_IOC_FSGETXATTRA:
1959 return xfs_ioc_fsgetxattr(ip, 1, arg);
1960 case XFS_IOC_FSSETXATTR:
1961 return xfs_ioc_fssetxattr(ip, filp, arg);
1962 case XFS_IOC_GETXFLAGS:
1963 return xfs_ioc_getxflags(ip, arg);
1964 case XFS_IOC_SETXFLAGS:
1965 return xfs_ioc_setxflags(ip, filp, arg);
1967 case XFS_IOC_FSSETDM: {
1968 struct fsdmidata dmi;
1970 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1973 error = mnt_want_write_file(filp);
1977 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1979 mnt_drop_write_file(filp);
1983 case XFS_IOC_GETBMAP:
1984 case XFS_IOC_GETBMAPA:
1985 case XFS_IOC_GETBMAPX:
1986 return xfs_ioc_getbmap(filp, cmd, arg);
1988 case FS_IOC_GETFSMAP:
1989 return xfs_ioc_getfsmap(ip, arg);
1991 case XFS_IOC_SCRUB_METADATA:
1992 return xfs_ioc_scrub_metadata(ip, arg);
1994 case XFS_IOC_FD_TO_HANDLE:
1995 case XFS_IOC_PATH_TO_HANDLE:
1996 case XFS_IOC_PATH_TO_FSHANDLE: {
1997 xfs_fsop_handlereq_t hreq;
1999 if (copy_from_user(&hreq, arg, sizeof(hreq)))
2001 return xfs_find_handle(cmd, &hreq);
2003 case XFS_IOC_OPEN_BY_HANDLE: {
2004 xfs_fsop_handlereq_t hreq;
2006 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2008 return xfs_open_by_handle(filp, &hreq);
2010 case XFS_IOC_FSSETDM_BY_HANDLE:
2011 return xfs_fssetdm_by_handle(filp, arg);
2013 case XFS_IOC_READLINK_BY_HANDLE: {
2014 xfs_fsop_handlereq_t hreq;
2016 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2018 return xfs_readlink_by_handle(filp, &hreq);
2020 case XFS_IOC_ATTRLIST_BY_HANDLE:
2021 return xfs_attrlist_by_handle(filp, arg);
2023 case XFS_IOC_ATTRMULTI_BY_HANDLE:
2024 return xfs_attrmulti_by_handle(filp, arg);
2026 case XFS_IOC_SWAPEXT: {
2027 struct xfs_swapext sxp;
2029 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
2031 error = mnt_want_write_file(filp);
2034 error = xfs_ioc_swapext(&sxp);
2035 mnt_drop_write_file(filp);
2039 case XFS_IOC_FSCOUNTS: {
2040 xfs_fsop_counts_t out;
2042 error = xfs_fs_counts(mp, &out);
2046 if (copy_to_user(arg, &out, sizeof(out)))
2051 case XFS_IOC_SET_RESBLKS: {
2052 xfs_fsop_resblks_t inout;
2055 if (!capable(CAP_SYS_ADMIN))
2058 if (mp->m_flags & XFS_MOUNT_RDONLY)
2061 if (copy_from_user(&inout, arg, sizeof(inout)))
2064 error = mnt_want_write_file(filp);
2068 /* input parameter is passed in resblks field of structure */
2070 error = xfs_reserve_blocks(mp, &in, &inout);
2071 mnt_drop_write_file(filp);
2075 if (copy_to_user(arg, &inout, sizeof(inout)))
2080 case XFS_IOC_GET_RESBLKS: {
2081 xfs_fsop_resblks_t out;
2083 if (!capable(CAP_SYS_ADMIN))
2086 error = xfs_reserve_blocks(mp, NULL, &out);
2090 if (copy_to_user(arg, &out, sizeof(out)))
2096 case XFS_IOC_FSGROWFSDATA: {
2097 xfs_growfs_data_t in;
2099 if (copy_from_user(&in, arg, sizeof(in)))
2102 error = mnt_want_write_file(filp);
2105 error = xfs_growfs_data(mp, &in);
2106 mnt_drop_write_file(filp);
2110 case XFS_IOC_FSGROWFSLOG: {
2111 xfs_growfs_log_t in;
2113 if (copy_from_user(&in, arg, sizeof(in)))
2116 error = mnt_want_write_file(filp);
2119 error = xfs_growfs_log(mp, &in);
2120 mnt_drop_write_file(filp);
2124 case XFS_IOC_FSGROWFSRT: {
2127 if (copy_from_user(&in, arg, sizeof(in)))
2130 error = mnt_want_write_file(filp);
2133 error = xfs_growfs_rt(mp, &in);
2134 mnt_drop_write_file(filp);
2138 case XFS_IOC_GOINGDOWN: {
2141 if (!capable(CAP_SYS_ADMIN))
2144 if (get_user(in, (uint32_t __user *)arg))
2147 return xfs_fs_goingdown(mp, in);
2150 case XFS_IOC_ERROR_INJECTION: {
2151 xfs_error_injection_t in;
2153 if (!capable(CAP_SYS_ADMIN))
2156 if (copy_from_user(&in, arg, sizeof(in)))
2159 return xfs_errortag_add(mp, in.errtag);
2162 case XFS_IOC_ERROR_CLEARALL:
2163 if (!capable(CAP_SYS_ADMIN))
2166 return xfs_errortag_clearall(mp);
2168 case XFS_IOC_FREE_EOFBLOCKS: {
2169 struct xfs_fs_eofblocks eofb;
2170 struct xfs_eofblocks keofb;
2172 if (!capable(CAP_SYS_ADMIN))
2175 if (mp->m_flags & XFS_MOUNT_RDONLY)
2178 if (copy_from_user(&eofb, arg, sizeof(eofb)))
2181 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
2185 return xfs_icache_free_eofblocks(mp, &keofb);