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_rtalloc.h"
15 #include "xfs_iwalk.h"
16 #include "xfs_itable.h"
17 #include "xfs_error.h"
20 #include "xfs_bmap_util.h"
21 #include "xfs_fsops.h"
22 #include "xfs_discard.h"
23 #include "xfs_quota.h"
24 #include "xfs_export.h"
25 #include "xfs_trace.h"
26 #include "xfs_icache.h"
27 #include "xfs_trans.h"
29 #include "xfs_btree.h"
30 #include <linux/fsmap.h>
31 #include "xfs_fsmap.h"
32 #include "scrub/xfs_scrub.h"
35 #include "xfs_health.h"
37 #include <linux/mount.h>
38 #include <linux/namei.h>
41 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
42 * a file or fs handle.
44 * XFS_IOC_PATH_TO_FSHANDLE
45 * returns fs handle for a mount point or path within that mount point
46 * XFS_IOC_FD_TO_HANDLE
47 * returns full handle for a FD opened in user space
48 * XFS_IOC_PATH_TO_HANDLE
49 * returns full handle for a path
54 xfs_fsop_handlereq_t *hreq)
64 if (cmd == XFS_IOC_FD_TO_HANDLE) {
68 inode = file_inode(f.file);
70 error = user_lpath((const char __user *)hreq->path, &path);
73 inode = d_inode(path.dentry);
78 * We can only generate handles for inodes residing on a XFS filesystem,
79 * and only for regular files, directories or symbolic links.
82 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
86 if (!S_ISREG(inode->i_mode) &&
87 !S_ISDIR(inode->i_mode) &&
88 !S_ISLNK(inode->i_mode))
92 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
94 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
96 * This handle only contains an fsid, zero the rest.
98 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
99 hsize = sizeof(xfs_fsid_t);
101 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
102 sizeof(handle.ha_fid.fid_len);
103 handle.ha_fid.fid_pad = 0;
104 handle.ha_fid.fid_gen = inode->i_generation;
105 handle.ha_fid.fid_ino = ip->i_ino;
106 hsize = sizeof(xfs_handle_t);
110 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
111 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
117 if (cmd == XFS_IOC_FD_TO_HANDLE)
125 * No need to do permission checks on the various pathname components
126 * as the handle operations are privileged.
129 xfs_handle_acceptable(
131 struct dentry *dentry)
137 * Convert userspace handle data into a dentry.
140 xfs_handle_to_dentry(
141 struct file *parfilp,
142 void __user *uhandle,
146 struct xfs_fid64 fid;
149 * Only allow handle opens under a directory.
151 if (!S_ISDIR(file_inode(parfilp)->i_mode))
152 return ERR_PTR(-ENOTDIR);
154 if (hlen != sizeof(xfs_handle_t))
155 return ERR_PTR(-EINVAL);
156 if (copy_from_user(&handle, uhandle, hlen))
157 return ERR_PTR(-EFAULT);
158 if (handle.ha_fid.fid_len !=
159 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
160 return ERR_PTR(-EINVAL);
162 memset(&fid, 0, sizeof(struct fid));
163 fid.ino = handle.ha_fid.fid_ino;
164 fid.gen = handle.ha_fid.fid_gen;
166 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
167 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
168 xfs_handle_acceptable, NULL);
171 STATIC struct dentry *
172 xfs_handlereq_to_dentry(
173 struct file *parfilp,
174 xfs_fsop_handlereq_t *hreq)
176 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
181 struct file *parfilp,
182 xfs_fsop_handlereq_t *hreq)
184 const struct cred *cred = current_cred();
190 struct dentry *dentry;
194 if (!capable(CAP_SYS_ADMIN))
197 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
199 return PTR_ERR(dentry);
200 inode = d_inode(dentry);
202 /* Restrict xfs_open_by_handle to directories & regular files. */
203 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
208 #if BITS_PER_LONG != 32
209 hreq->oflags |= O_LARGEFILE;
212 permflag = hreq->oflags;
213 fmode = OPEN_FMODE(permflag);
214 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
215 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
220 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
225 /* Can't write directories. */
226 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
231 fd = get_unused_fd_flags(0);
237 path.mnt = parfilp->f_path.mnt;
238 path.dentry = dentry;
239 filp = dentry_open(&path, hreq->oflags, cred);
243 return PTR_ERR(filp);
246 if (S_ISREG(inode->i_mode)) {
247 filp->f_flags |= O_NOATIME;
248 filp->f_mode |= FMODE_NOCMTIME;
251 fd_install(fd, filp);
260 xfs_readlink_by_handle(
261 struct file *parfilp,
262 xfs_fsop_handlereq_t *hreq)
264 struct dentry *dentry;
268 if (!capable(CAP_SYS_ADMIN))
271 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
273 return PTR_ERR(dentry);
275 /* Restrict this handle operation to symlinks only. */
276 if (!d_is_symlink(dentry)) {
281 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
286 error = vfs_readlink(dentry, hreq->ohandle, olen);
299 xfs_mount_t *mp = ip->i_mount;
303 if (!capable(CAP_SYS_ADMIN))
306 if (XFS_FORCED_SHUTDOWN(mp))
309 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
313 xfs_ilock(ip, XFS_ILOCK_EXCL);
314 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
316 ip->i_d.di_dmevmask = evmask;
317 ip->i_d.di_dmstate = state;
319 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
320 error = xfs_trans_commit(tp);
326 xfs_fssetdm_by_handle(
327 struct file *parfilp,
331 struct fsdmidata fsd;
332 xfs_fsop_setdm_handlereq_t dmhreq;
333 struct dentry *dentry;
335 if (!capable(CAP_MKNOD))
337 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
340 error = mnt_want_write_file(parfilp);
344 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
345 if (IS_ERR(dentry)) {
346 mnt_drop_write_file(parfilp);
347 return PTR_ERR(dentry);
350 if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
355 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
360 error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
364 mnt_drop_write_file(parfilp);
370 xfs_attrlist_by_handle(
371 struct file *parfilp,
375 attrlist_cursor_kern_t *cursor;
376 struct xfs_fsop_attrlist_handlereq __user *p = arg;
377 xfs_fsop_attrlist_handlereq_t al_hreq;
378 struct dentry *dentry;
381 if (!capable(CAP_SYS_ADMIN))
383 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
385 if (al_hreq.buflen < sizeof(struct attrlist) ||
386 al_hreq.buflen > XFS_XATTR_LIST_MAX)
390 * Reject flags, only allow namespaces.
392 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
395 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
397 return PTR_ERR(dentry);
399 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
403 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
404 error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
405 al_hreq.flags, cursor);
409 if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
414 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
425 xfs_attrmulti_attr_get(
428 unsigned char __user *ubuf,
435 if (*len > XFS_XATTR_SIZE_MAX)
437 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
441 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
445 if (copy_to_user(ubuf, kbuf, *len))
454 xfs_attrmulti_attr_set(
457 const unsigned char __user *ubuf,
464 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
466 if (len > XFS_XATTR_SIZE_MAX)
469 kbuf = memdup_user(ubuf, len);
471 return PTR_ERR(kbuf);
473 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
475 xfs_forget_acl(inode, name, flags);
481 xfs_attrmulti_attr_remove(
488 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
490 error = xfs_attr_remove(XFS_I(inode), name, flags);
492 xfs_forget_acl(inode, name, flags);
497 xfs_attrmulti_by_handle(
498 struct file *parfilp,
502 xfs_attr_multiop_t *ops;
503 xfs_fsop_attrmulti_handlereq_t am_hreq;
504 struct dentry *dentry;
505 unsigned int i, size;
506 unsigned char *attr_name;
508 if (!capable(CAP_SYS_ADMIN))
510 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
514 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
517 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
519 return PTR_ERR(dentry);
522 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
523 if (!size || size > 16 * PAGE_SIZE)
526 ops = memdup_user(am_hreq.ops, size);
528 error = PTR_ERR(ops);
533 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
538 for (i = 0; i < am_hreq.opcount; i++) {
539 ops[i].am_error = strncpy_from_user((char *)attr_name,
540 ops[i].am_attrname, MAXNAMELEN);
541 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
543 if (ops[i].am_error < 0)
546 switch (ops[i].am_opcode) {
548 ops[i].am_error = xfs_attrmulti_attr_get(
549 d_inode(dentry), attr_name,
550 ops[i].am_attrvalue, &ops[i].am_length,
554 ops[i].am_error = mnt_want_write_file(parfilp);
557 ops[i].am_error = xfs_attrmulti_attr_set(
558 d_inode(dentry), attr_name,
559 ops[i].am_attrvalue, ops[i].am_length,
561 mnt_drop_write_file(parfilp);
564 ops[i].am_error = mnt_want_write_file(parfilp);
567 ops[i].am_error = xfs_attrmulti_attr_remove(
568 d_inode(dentry), attr_name,
570 mnt_drop_write_file(parfilp);
573 ops[i].am_error = -EINVAL;
577 if (copy_to_user(am_hreq.ops, ops, size))
594 struct inode *inode = file_inode(filp);
595 struct xfs_inode *ip = XFS_I(inode);
597 enum xfs_prealloc_flags flags = 0;
598 uint iolock = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL;
601 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
604 if (!(filp->f_mode & FMODE_WRITE))
607 if (!S_ISREG(inode->i_mode))
610 if (filp->f_flags & O_DSYNC)
611 flags |= XFS_PREALLOC_SYNC;
612 if (filp->f_mode & FMODE_NOCMTIME)
613 flags |= XFS_PREALLOC_INVISIBLE;
615 error = mnt_want_write_file(filp);
619 xfs_ilock(ip, iolock);
620 error = xfs_break_layouts(inode, &iolock, BREAK_UNMAP);
624 switch (bf->l_whence) {
628 bf->l_start += filp->f_pos;
631 bf->l_start += XFS_ISIZE(ip);
639 * length of <= 0 for resv/unresv/zero is invalid. length for
640 * alloc/free is ignored completely and we have no idea what userspace
641 * might have set it to, so set it to zero to allow range
645 case XFS_IOC_ZERO_RANGE:
647 case XFS_IOC_RESVSP64:
648 case XFS_IOC_UNRESVSP:
649 case XFS_IOC_UNRESVSP64:
650 if (bf->l_len <= 0) {
660 if (bf->l_start < 0 ||
661 bf->l_start > inode->i_sb->s_maxbytes ||
662 bf->l_start + bf->l_len < 0 ||
663 bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) {
669 case XFS_IOC_ZERO_RANGE:
670 flags |= XFS_PREALLOC_SET;
671 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
674 case XFS_IOC_RESVSP64:
675 flags |= XFS_PREALLOC_SET;
676 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
679 case XFS_IOC_UNRESVSP:
680 case XFS_IOC_UNRESVSP64:
681 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
683 case XFS_IOC_ALLOCSP:
684 case XFS_IOC_ALLOCSP64:
686 case XFS_IOC_FREESP64:
687 flags |= XFS_PREALLOC_CLEAR;
688 if (bf->l_start > XFS_ISIZE(ip)) {
689 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
690 bf->l_start - XFS_ISIZE(ip), 0);
695 iattr.ia_valid = ATTR_SIZE;
696 iattr.ia_size = bf->l_start;
698 error = xfs_vn_setattr_size(file_dentry(filp), &iattr);
708 error = xfs_update_prealloc_flags(ip, flags);
711 xfs_iunlock(ip, iolock);
712 mnt_drop_write_file(filp);
716 /* Return 0 on success or positive error */
718 xfs_fsbulkstat_one_fmt(
719 struct xfs_ibulk *breq,
720 const struct xfs_bulkstat *bstat)
722 struct xfs_bstat bs1;
724 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
725 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1)))
727 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat));
732 struct xfs_ibulk *breq,
733 const struct xfs_inumbers *igrp)
735 struct xfs_inogrp ig1;
737 xfs_inumbers_to_inogrp(&ig1, igrp);
738 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp)))
740 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp));
749 struct xfs_fsop_bulkreq bulkreq;
750 struct xfs_ibulk breq = {
757 /* done = 1 if there are more stats to get and if bulkstat */
758 /* should be called again (unused here, but used in dmapi) */
760 if (!capable(CAP_SYS_ADMIN))
763 if (XFS_FORCED_SHUTDOWN(mp))
766 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq)))
769 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64)))
772 if (bulkreq.icount <= 0)
775 if (bulkreq.ubuffer == NULL)
778 breq.ubuffer = bulkreq.ubuffer;
779 breq.icount = bulkreq.icount;
782 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number
783 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect
784 * that *lastip contains either zero or the number of the last inode to
785 * be examined by the previous call and return results starting with
786 * the next inode after that. The new bulk request back end functions
787 * take the inode to start with, so we have to compute the startino
788 * parameter from lastino to maintain correct function. lastino == 0
789 * is a special case because it has traditionally meant "first inode
792 if (cmd == XFS_IOC_FSINUMBERS) {
793 breq.startino = lastino ? lastino + 1 : 0;
794 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt);
795 lastino = breq.startino - 1;
796 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) {
797 breq.startino = lastino;
799 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt);
800 } else { /* XFS_IOC_FSBULKSTAT */
801 breq.startino = lastino ? lastino + 1 : 0;
802 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt);
803 lastino = breq.startino - 1;
809 if (bulkreq.lastip != NULL &&
810 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t)))
813 if (bulkreq.ocount != NULL &&
814 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32)))
820 /* Return 0 on success or positive error */
823 struct xfs_ibulk *breq,
824 const struct xfs_bulkstat *bstat)
826 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat)))
828 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat));
832 * Check the incoming bulk request @hdr from userspace and initialize the
833 * internal @breq bulk request appropriately. Returns 0 if the bulk request
834 * should proceed; XFS_ITER_ABORT if there's nothing to do; or the usual
835 * negative error code.
839 struct xfs_mount *mp,
840 struct xfs_bulk_ireq *hdr,
841 struct xfs_ibulk *breq,
842 void __user *ubuffer)
844 if (hdr->icount == 0 ||
845 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) ||
846 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved)))
849 breq->startino = hdr->ino;
850 breq->ubuffer = ubuffer;
851 breq->icount = hdr->icount;
856 * The @ino parameter is a special value, so we must look it up here.
857 * We're not allowed to have IREQ_AGNO, and we only return one inode
860 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) {
861 if (hdr->flags & XFS_BULK_IREQ_AGNO)
865 case XFS_BULK_IREQ_SPECIAL_ROOT:
866 hdr->ino = mp->m_sb.sb_rootino;
875 * The IREQ_AGNO flag means that we only want results from a given AG.
876 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is
877 * beyond the specified AG then we return no results.
879 if (hdr->flags & XFS_BULK_IREQ_AGNO) {
880 if (hdr->agno >= mp->m_sb.sb_agcount)
883 if (breq->startino == 0)
884 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0);
885 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno)
888 breq->flags |= XFS_IBULK_SAME_AG;
890 /* Asking for an inode past the end of the AG? We're done! */
891 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno)
892 return XFS_ITER_ABORT;
893 } else if (hdr->agno)
896 /* Asking for an inode past the end of the FS? We're done! */
897 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount)
898 return XFS_ITER_ABORT;
904 * Update the userspace bulk request @hdr to reflect the end state of the
905 * internal bulk request @breq.
908 xfs_bulk_ireq_teardown(
909 struct xfs_bulk_ireq *hdr,
910 struct xfs_ibulk *breq)
912 hdr->ino = breq->startino;
913 hdr->ocount = breq->ocount;
916 /* Handle the v5 bulkstat ioctl. */
919 struct xfs_mount *mp,
921 struct xfs_bulkstat_req __user *arg)
923 struct xfs_bulk_ireq hdr;
924 struct xfs_ibulk breq = {
929 if (!capable(CAP_SYS_ADMIN))
932 if (XFS_FORCED_SHUTDOWN(mp))
935 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
938 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat);
939 if (error == XFS_ITER_ABORT)
944 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt);
949 xfs_bulk_ireq_teardown(&hdr, &breq);
950 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
958 struct xfs_ibulk *breq,
959 const struct xfs_inumbers *igrp)
961 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers)))
963 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers));
966 /* Handle the v5 inumbers ioctl. */
969 struct xfs_mount *mp,
971 struct xfs_inumbers_req __user *arg)
973 struct xfs_bulk_ireq hdr;
974 struct xfs_ibulk breq = {
979 if (!capable(CAP_SYS_ADMIN))
982 if (XFS_FORCED_SHUTDOWN(mp))
985 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
988 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers);
989 if (error == XFS_ITER_ABORT)
994 error = xfs_inumbers(&breq, xfs_inumbers_fmt);
999 xfs_bulk_ireq_teardown(&hdr, &breq);
1000 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
1008 struct xfs_mount *mp,
1012 struct xfs_fsop_geom fsgeo;
1015 xfs_fs_geometry(&mp->m_sb, &fsgeo, struct_version);
1017 if (struct_version <= 3)
1018 len = sizeof(struct xfs_fsop_geom_v1);
1019 else if (struct_version == 4)
1020 len = sizeof(struct xfs_fsop_geom_v4);
1022 xfs_fsop_geom_health(mp, &fsgeo);
1023 len = sizeof(fsgeo);
1026 if (copy_to_user(arg, &fsgeo, len))
1032 xfs_ioc_ag_geometry(
1033 struct xfs_mount *mp,
1036 struct xfs_ag_geometry ageo;
1039 if (copy_from_user(&ageo, arg, sizeof(ageo)))
1042 error = xfs_ag_get_geometry(mp, ageo.ag_number, &ageo);
1046 if (copy_to_user(arg, &ageo, sizeof(ageo)))
1052 * Linux extended inode flags interface.
1056 xfs_merge_ioc_xflags(
1060 unsigned int xflags = start;
1062 if (flags & FS_IMMUTABLE_FL)
1063 xflags |= FS_XFLAG_IMMUTABLE;
1065 xflags &= ~FS_XFLAG_IMMUTABLE;
1066 if (flags & FS_APPEND_FL)
1067 xflags |= FS_XFLAG_APPEND;
1069 xflags &= ~FS_XFLAG_APPEND;
1070 if (flags & FS_SYNC_FL)
1071 xflags |= FS_XFLAG_SYNC;
1073 xflags &= ~FS_XFLAG_SYNC;
1074 if (flags & FS_NOATIME_FL)
1075 xflags |= FS_XFLAG_NOATIME;
1077 xflags &= ~FS_XFLAG_NOATIME;
1078 if (flags & FS_NODUMP_FL)
1079 xflags |= FS_XFLAG_NODUMP;
1081 xflags &= ~FS_XFLAG_NODUMP;
1090 unsigned int flags = 0;
1092 if (di_flags & XFS_DIFLAG_IMMUTABLE)
1093 flags |= FS_IMMUTABLE_FL;
1094 if (di_flags & XFS_DIFLAG_APPEND)
1095 flags |= FS_APPEND_FL;
1096 if (di_flags & XFS_DIFLAG_SYNC)
1097 flags |= FS_SYNC_FL;
1098 if (di_flags & XFS_DIFLAG_NOATIME)
1099 flags |= FS_NOATIME_FL;
1100 if (di_flags & XFS_DIFLAG_NODUMP)
1101 flags |= FS_NODUMP_FL;
1107 struct xfs_inode *ip,
1111 simple_fill_fsxattr(fa, xfs_ip2xflags(ip));
1112 fa->fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
1113 fa->fsx_cowextsize = ip->i_d.di_cowextsize <<
1114 ip->i_mount->m_sb.sb_blocklog;
1115 fa->fsx_projid = xfs_get_projid(ip);
1119 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
1120 fa->fsx_nextents = xfs_iext_count(ip->i_afp);
1122 fa->fsx_nextents = ip->i_d.di_anextents;
1124 fa->fsx_nextents = 0;
1126 if (ip->i_df.if_flags & XFS_IFEXTENTS)
1127 fa->fsx_nextents = xfs_iext_count(&ip->i_df);
1129 fa->fsx_nextents = ip->i_d.di_nextents;
1141 xfs_ilock(ip, XFS_ILOCK_SHARED);
1142 xfs_fill_fsxattr(ip, attr, &fa);
1143 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1145 if (copy_to_user(arg, &fa, sizeof(fa)))
1152 struct xfs_inode *ip,
1153 unsigned int xflags)
1155 /* can't set PREALLOC this way, just preserve it */
1157 (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
1159 if (xflags & FS_XFLAG_IMMUTABLE)
1160 di_flags |= XFS_DIFLAG_IMMUTABLE;
1161 if (xflags & FS_XFLAG_APPEND)
1162 di_flags |= XFS_DIFLAG_APPEND;
1163 if (xflags & FS_XFLAG_SYNC)
1164 di_flags |= XFS_DIFLAG_SYNC;
1165 if (xflags & FS_XFLAG_NOATIME)
1166 di_flags |= XFS_DIFLAG_NOATIME;
1167 if (xflags & FS_XFLAG_NODUMP)
1168 di_flags |= XFS_DIFLAG_NODUMP;
1169 if (xflags & FS_XFLAG_NODEFRAG)
1170 di_flags |= XFS_DIFLAG_NODEFRAG;
1171 if (xflags & FS_XFLAG_FILESTREAM)
1172 di_flags |= XFS_DIFLAG_FILESTREAM;
1173 if (S_ISDIR(VFS_I(ip)->i_mode)) {
1174 if (xflags & FS_XFLAG_RTINHERIT)
1175 di_flags |= XFS_DIFLAG_RTINHERIT;
1176 if (xflags & FS_XFLAG_NOSYMLINKS)
1177 di_flags |= XFS_DIFLAG_NOSYMLINKS;
1178 if (xflags & FS_XFLAG_EXTSZINHERIT)
1179 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
1180 if (xflags & FS_XFLAG_PROJINHERIT)
1181 di_flags |= XFS_DIFLAG_PROJINHERIT;
1182 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
1183 if (xflags & FS_XFLAG_REALTIME)
1184 di_flags |= XFS_DIFLAG_REALTIME;
1185 if (xflags & FS_XFLAG_EXTSIZE)
1186 di_flags |= XFS_DIFLAG_EXTSIZE;
1194 struct xfs_inode *ip,
1195 unsigned int xflags)
1197 uint64_t di_flags2 =
1198 (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
1200 if (xflags & FS_XFLAG_DAX)
1201 di_flags2 |= XFS_DIFLAG2_DAX;
1202 if (xflags & FS_XFLAG_COWEXTSIZE)
1203 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
1209 xfs_diflags_to_linux(
1210 struct xfs_inode *ip)
1212 struct inode *inode = VFS_I(ip);
1213 unsigned int xflags = xfs_ip2xflags(ip);
1215 if (xflags & FS_XFLAG_IMMUTABLE)
1216 inode->i_flags |= S_IMMUTABLE;
1218 inode->i_flags &= ~S_IMMUTABLE;
1219 if (xflags & FS_XFLAG_APPEND)
1220 inode->i_flags |= S_APPEND;
1222 inode->i_flags &= ~S_APPEND;
1223 if (xflags & FS_XFLAG_SYNC)
1224 inode->i_flags |= S_SYNC;
1226 inode->i_flags &= ~S_SYNC;
1227 if (xflags & FS_XFLAG_NOATIME)
1228 inode->i_flags |= S_NOATIME;
1230 inode->i_flags &= ~S_NOATIME;
1231 #if 0 /* disabled until the flag switching races are sorted out */
1232 if (xflags & FS_XFLAG_DAX)
1233 inode->i_flags |= S_DAX;
1235 inode->i_flags &= ~S_DAX;
1240 xfs_ioctl_setattr_xflags(
1241 struct xfs_trans *tp,
1242 struct xfs_inode *ip,
1245 struct xfs_mount *mp = ip->i_mount;
1248 /* Can't change realtime flag if any extents are allocated. */
1249 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1250 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
1253 /* If realtime flag is set then must have realtime device */
1254 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
1255 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
1256 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize))
1260 /* Clear reflink if we are actually able to set the rt flag. */
1261 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
1262 ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
1264 /* Don't allow us to set DAX mode for a reflinked file for now. */
1265 if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
1268 /* diflags2 only valid for v3 inodes. */
1269 di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
1270 if (di_flags2 && ip->i_d.di_version < 3)
1273 ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags);
1274 ip->i_d.di_flags2 = di_flags2;
1276 xfs_diflags_to_linux(ip);
1277 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1278 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1279 XFS_STATS_INC(mp, xs_ig_attrchg);
1284 * If we are changing DAX flags, we have to ensure the file is clean and any
1285 * cached objects in the address space are invalidated and removed. This
1286 * requires us to lock out other IO and page faults similar to a truncate
1287 * operation. The locks need to be held until the transaction has been committed
1288 * so that the cache invalidation is atomic with respect to the DAX flag
1292 xfs_ioctl_setattr_dax_invalidate(
1293 struct xfs_inode *ip,
1297 struct inode *inode = VFS_I(ip);
1298 struct super_block *sb = inode->i_sb;
1304 * It is only valid to set the DAX flag on regular files and
1305 * directories on filesystems where the block size is equal to the page
1306 * size. On directories it serves as an inherited hint so we don't
1307 * have to check the device for dax support or flush pagecache.
1309 if (fa->fsx_xflags & FS_XFLAG_DAX) {
1310 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
1312 if (S_ISREG(inode->i_mode) &&
1313 !bdev_dax_supported(xfs_find_bdev_for_inode(VFS_I(ip)),
1318 /* If the DAX state is not changing, we have nothing to do here. */
1319 if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
1321 if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
1324 if (S_ISDIR(inode->i_mode))
1327 /* lock, flush and invalidate mapping in preparation for flag change */
1328 xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1329 error = filemap_write_and_wait(inode->i_mapping);
1332 error = invalidate_inode_pages2(inode->i_mapping);
1336 *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
1340 xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
1346 * Set up the transaction structure for the setattr operation, checking that we
1347 * have permission to do so. On success, return a clean transaction and the
1348 * inode locked exclusively ready for further operation specific checks. On
1349 * failure, return an error without modifying or locking the inode.
1351 * The inode might already be IO locked on call. If this is the case, it is
1352 * indicated in @join_flags and we take full responsibility for ensuring they
1353 * are unlocked from now on. Hence if we have an error here, we still have to
1354 * unlock them. Otherwise, once they are joined to the transaction, they will
1355 * be unlocked on commit/cancel.
1357 static struct xfs_trans *
1358 xfs_ioctl_setattr_get_trans(
1359 struct xfs_inode *ip,
1362 struct xfs_mount *mp = ip->i_mount;
1363 struct xfs_trans *tp;
1366 if (mp->m_flags & XFS_MOUNT_RDONLY)
1369 if (XFS_FORCED_SHUTDOWN(mp))
1372 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
1376 xfs_ilock(ip, XFS_ILOCK_EXCL);
1377 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
1381 * CAP_FOWNER overrides the following restrictions:
1383 * The user ID of the calling process must be equal to the file owner
1384 * ID, except in cases where the CAP_FSETID capability is applicable.
1386 if (!inode_owner_or_capable(VFS_I(ip))) {
1391 if (mp->m_flags & XFS_MOUNT_WSYNC)
1392 xfs_trans_set_sync(tp);
1397 xfs_trans_cancel(tp);
1400 xfs_iunlock(ip, join_flags);
1401 return ERR_PTR(error);
1405 * extent size hint validation is somewhat cumbersome. Rules are:
1407 * 1. extent size hint is only valid for directories and regular files
1408 * 2. FS_XFLAG_EXTSIZE is only valid for regular files
1409 * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories.
1410 * 4. can only be changed on regular files if no extents are allocated
1411 * 5. can be changed on directories at any time
1412 * 6. extsize hint of 0 turns off hints, clears inode flags.
1413 * 7. Extent size must be a multiple of the appropriate block size.
1414 * 8. for non-realtime files, the extent size hint must be limited
1415 * to half the AG size to avoid alignment extending the extent beyond the
1418 * Please keep this function in sync with xfs_scrub_inode_extsize.
1421 xfs_ioctl_setattr_check_extsize(
1422 struct xfs_inode *ip,
1425 struct xfs_mount *mp = ip->i_mount;
1427 xfs_fsblock_t extsize_fsb;
1429 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
1430 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
1433 if (fa->fsx_extsize == 0)
1436 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1437 if (extsize_fsb > MAXEXTLEN)
1440 if (XFS_IS_REALTIME_INODE(ip) ||
1441 (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
1442 size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
1444 size = mp->m_sb.sb_blocksize;
1445 if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
1449 if (fa->fsx_extsize % size)
1456 * CoW extent size hint validation rules are:
1458 * 1. CoW extent size hint can only be set if reflink is enabled on the fs.
1459 * The inode does not have to have any shared blocks, but it must be a v3.
1460 * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
1461 * for a directory, the hint is propagated to new files.
1462 * 3. Can be changed on files & directories at any time.
1463 * 4. CoW extsize hint of 0 turns off hints, clears inode flags.
1464 * 5. Extent size must be a multiple of the appropriate block size.
1465 * 6. The extent size hint must be limited to half the AG size to avoid
1466 * alignment extending the extent beyond the limits of the AG.
1468 * Please keep this function in sync with xfs_scrub_inode_cowextsize.
1471 xfs_ioctl_setattr_check_cowextsize(
1472 struct xfs_inode *ip,
1475 struct xfs_mount *mp = ip->i_mount;
1477 xfs_fsblock_t cowextsize_fsb;
1479 if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
1482 if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) ||
1483 ip->i_d.di_version != 3)
1486 if (fa->fsx_cowextsize == 0)
1489 cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1490 if (cowextsize_fsb > MAXEXTLEN)
1493 size = mp->m_sb.sb_blocksize;
1494 if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
1497 if (fa->fsx_cowextsize % size)
1504 xfs_ioctl_setattr_check_projid(
1505 struct xfs_inode *ip,
1508 /* Disallow 32bit project ids if projid32bit feature is not enabled. */
1509 if (fa->fsx_projid > (uint16_t)-1 &&
1510 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
1520 struct fsxattr old_fa;
1521 struct xfs_mount *mp = ip->i_mount;
1522 struct xfs_trans *tp;
1523 struct xfs_dquot *udqp = NULL;
1524 struct xfs_dquot *pdqp = NULL;
1525 struct xfs_dquot *olddquot = NULL;
1529 trace_xfs_ioctl_setattr(ip);
1531 code = xfs_ioctl_setattr_check_projid(ip, fa);
1536 * If disk quotas is on, we make sure that the dquots do exist on disk,
1537 * before we start any other transactions. Trying to do this later
1538 * is messy. We don't care to take a readlock to look at the ids
1539 * in inode here, because we can't hold it across the trans_reserve.
1540 * If the IDs do change before we take the ilock, we're covered
1541 * because the i_*dquot fields will get updated anyway.
1543 if (XFS_IS_QUOTA_ON(mp)) {
1544 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
1545 ip->i_d.di_gid, fa->fsx_projid,
1546 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
1552 * Changing DAX config may require inode locking for mapping
1553 * invalidation. These need to be held all the way to transaction commit
1554 * or cancel time, so need to be passed through to
1555 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1558 code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
1560 goto error_free_dquots;
1562 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1565 goto error_free_dquots;
1568 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
1569 xfs_get_projid(ip) != fa->fsx_projid) {
1570 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
1571 capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0);
1572 if (code) /* out of quota */
1573 goto error_trans_cancel;
1576 xfs_fill_fsxattr(ip, false, &old_fa);
1577 code = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, fa);
1579 goto error_trans_cancel;
1581 code = xfs_ioctl_setattr_check_extsize(ip, fa);
1583 goto error_trans_cancel;
1585 code = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1587 goto error_trans_cancel;
1589 code = xfs_ioctl_setattr_xflags(tp, ip, fa);
1591 goto error_trans_cancel;
1594 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1595 * overrides the following restrictions:
1597 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1598 * successful return from chown()
1601 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
1602 !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
1603 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
1605 /* Change the ownerships and register project quota modifications */
1606 if (xfs_get_projid(ip) != fa->fsx_projid) {
1607 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1608 olddquot = xfs_qm_vop_chown(tp, ip,
1609 &ip->i_pdquot, pdqp);
1611 ASSERT(ip->i_d.di_version > 1);
1612 xfs_set_projid(ip, fa->fsx_projid);
1616 * Only set the extent size hint if we've already determined that the
1617 * extent size hint should be set on the inode. If no extent size flags
1618 * are set on the inode then unconditionally clear the extent size hint.
1620 if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
1621 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
1623 ip->i_d.di_extsize = 0;
1624 if (ip->i_d.di_version == 3 &&
1625 (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
1626 ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
1627 mp->m_sb.sb_blocklog;
1629 ip->i_d.di_cowextsize = 0;
1631 code = xfs_trans_commit(tp);
1634 * Release any dquot(s) the inode had kept before chown.
1636 xfs_qm_dqrele(olddquot);
1637 xfs_qm_dqrele(udqp);
1638 xfs_qm_dqrele(pdqp);
1643 xfs_trans_cancel(tp);
1645 xfs_qm_dqrele(udqp);
1646 xfs_qm_dqrele(pdqp);
1659 if (copy_from_user(&fa, arg, sizeof(fa)))
1662 error = mnt_want_write_file(filp);
1665 error = xfs_ioctl_setattr(ip, &fa);
1666 mnt_drop_write_file(filp);
1677 flags = xfs_di2lxflags(ip->i_d.di_flags);
1678 if (copy_to_user(arg, &flags, sizeof(flags)))
1685 struct xfs_inode *ip,
1689 struct xfs_trans *tp;
1691 struct fsxattr old_fa;
1696 if (copy_from_user(&flags, arg, sizeof(flags)))
1699 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1700 FS_NOATIME_FL | FS_NODUMP_FL | \
1704 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
1706 error = mnt_want_write_file(filp);
1711 * Changing DAX config may require inode locking for mapping
1712 * invalidation. These need to be held all the way to transaction commit
1713 * or cancel time, so need to be passed through to
1714 * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
1717 error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
1719 goto out_drop_write;
1721 tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
1723 error = PTR_ERR(tp);
1724 goto out_drop_write;
1727 xfs_fill_fsxattr(ip, false, &old_fa);
1728 error = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, &fa);
1730 xfs_trans_cancel(tp);
1731 goto out_drop_write;
1734 error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
1736 xfs_trans_cancel(tp);
1737 goto out_drop_write;
1740 error = xfs_trans_commit(tp);
1742 mnt_drop_write_file(filp);
1749 struct getbmapx __user *u,
1752 if (put_user(p->bmv_offset, &u->bmv_offset) ||
1753 put_user(p->bmv_block, &u->bmv_block) ||
1754 put_user(p->bmv_length, &u->bmv_length) ||
1755 put_user(0, &u->bmv_count) ||
1756 put_user(0, &u->bmv_entries))
1758 if (recsize < sizeof(struct getbmapx))
1760 if (put_user(0, &u->bmv_iflags) ||
1761 put_user(p->bmv_oflags, &u->bmv_oflags) ||
1762 put_user(0, &u->bmv_unused1) ||
1763 put_user(0, &u->bmv_unused2))
1774 struct getbmapx bmx = { 0 };
1775 struct kgetbmap *buf;
1780 case XFS_IOC_GETBMAPA:
1781 bmx.bmv_iflags = BMV_IF_ATTRFORK;
1783 case XFS_IOC_GETBMAP:
1784 if (file->f_mode & FMODE_NOCMTIME)
1785 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
1786 /* struct getbmap is a strict subset of struct getbmapx. */
1787 recsize = sizeof(struct getbmap);
1789 case XFS_IOC_GETBMAPX:
1790 recsize = sizeof(struct getbmapx);
1796 if (copy_from_user(&bmx, arg, recsize))
1799 if (bmx.bmv_count < 2)
1801 if (bmx.bmv_count > ULONG_MAX / recsize)
1804 buf = kmem_zalloc_large(bmx.bmv_count * sizeof(*buf), 0);
1808 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
1813 if (copy_to_user(arg, &bmx, recsize))
1817 for (i = 0; i < bmx.bmv_entries; i++) {
1818 if (!xfs_getbmap_format(buf + i, arg, recsize))
1829 struct getfsmap_info {
1830 struct xfs_mount *mp;
1831 struct fsmap_head __user *data;
1837 xfs_getfsmap_format(struct xfs_fsmap *xfm, void *priv)
1839 struct getfsmap_info *info = priv;
1842 trace_xfs_getfsmap_mapping(info->mp, xfm);
1844 info->last_flags = xfm->fmr_flags;
1845 xfs_fsmap_from_internal(&fm, xfm);
1846 if (copy_to_user(&info->data->fmh_recs[info->idx++], &fm,
1847 sizeof(struct fsmap)))
1855 struct xfs_inode *ip,
1856 struct fsmap_head __user *arg)
1858 struct getfsmap_info info = { NULL };
1859 struct xfs_fsmap_head xhead = {0};
1860 struct fsmap_head head;
1861 bool aborted = false;
1864 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1866 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1867 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1868 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1869 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1870 sizeof(head.fmh_keys[1].fmr_reserved)))
1873 xhead.fmh_iflags = head.fmh_iflags;
1874 xhead.fmh_count = head.fmh_count;
1875 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1876 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1878 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1879 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1881 info.mp = ip->i_mount;
1883 error = xfs_getfsmap(ip->i_mount, &xhead, xfs_getfsmap_format, &info);
1884 if (error == XFS_BTREE_QUERY_RANGE_ABORT) {
1890 /* If we didn't abort, set the "last" flag in the last fmx */
1891 if (!aborted && info.idx) {
1892 info.last_flags |= FMR_OF_LAST;
1893 if (copy_to_user(&info.data->fmh_recs[info.idx - 1].fmr_flags,
1894 &info.last_flags, sizeof(info.last_flags)))
1898 /* copy back header */
1899 head.fmh_entries = xhead.fmh_entries;
1900 head.fmh_oflags = xhead.fmh_oflags;
1901 if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
1908 xfs_ioc_scrub_metadata(
1909 struct xfs_inode *ip,
1912 struct xfs_scrub_metadata scrub;
1915 if (!capable(CAP_SYS_ADMIN))
1918 if (copy_from_user(&scrub, arg, sizeof(scrub)))
1921 error = xfs_scrub_metadata(ip, &scrub);
1925 if (copy_to_user(arg, &scrub, sizeof(scrub)))
1935 xfs_inode_t *ip, *tip;
1939 /* Pull information for the target fd */
1940 f = fdget((int)sxp->sx_fdtarget);
1946 if (!(f.file->f_mode & FMODE_WRITE) ||
1947 !(f.file->f_mode & FMODE_READ) ||
1948 (f.file->f_flags & O_APPEND)) {
1953 tmp = fdget((int)sxp->sx_fdtmp);
1959 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1960 !(tmp.file->f_mode & FMODE_READ) ||
1961 (tmp.file->f_flags & O_APPEND)) {
1963 goto out_put_tmp_file;
1966 if (IS_SWAPFILE(file_inode(f.file)) ||
1967 IS_SWAPFILE(file_inode(tmp.file))) {
1969 goto out_put_tmp_file;
1973 * We need to ensure that the fds passed in point to XFS inodes
1974 * before we cast and access them as XFS structures as we have no
1975 * control over what the user passes us here.
1977 if (f.file->f_op != &xfs_file_operations ||
1978 tmp.file->f_op != &xfs_file_operations) {
1980 goto out_put_tmp_file;
1983 ip = XFS_I(file_inode(f.file));
1984 tip = XFS_I(file_inode(tmp.file));
1986 if (ip->i_mount != tip->i_mount) {
1988 goto out_put_tmp_file;
1991 if (ip->i_ino == tip->i_ino) {
1993 goto out_put_tmp_file;
1996 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1998 goto out_put_tmp_file;
2001 error = xfs_swap_extents(ip, tip, sxp);
2013 struct xfs_mount *mp,
2014 char __user *user_label)
2016 struct xfs_sb *sbp = &mp->m_sb;
2017 char label[XFSLABEL_MAX + 1];
2020 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
2022 /* 1 larger than sb_fname, so this ensures a trailing NUL char */
2023 memset(label, 0, sizeof(label));
2024 spin_lock(&mp->m_sb_lock);
2025 strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
2026 spin_unlock(&mp->m_sb_lock);
2028 if (copy_to_user(user_label, label, sizeof(label)))
2036 struct xfs_mount *mp,
2037 char __user *newlabel)
2039 struct xfs_sb *sbp = &mp->m_sb;
2040 char label[XFSLABEL_MAX + 1];
2044 if (!capable(CAP_SYS_ADMIN))
2047 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
2048 * smaller, at 12 bytes. We copy one more to be sure we find the
2049 * (required) NULL character to test the incoming label length.
2050 * NB: The on disk label doesn't need to be null terminated.
2052 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
2054 len = strnlen(label, XFSLABEL_MAX + 1);
2055 if (len > sizeof(sbp->sb_fname))
2058 error = mnt_want_write_file(filp);
2062 spin_lock(&mp->m_sb_lock);
2063 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
2064 memcpy(sbp->sb_fname, label, len);
2065 spin_unlock(&mp->m_sb_lock);
2068 * Now we do several things to satisfy userspace.
2069 * In addition to normal logging of the primary superblock, we also
2070 * immediately write these changes to sector zero for the primary, then
2071 * update all backup supers (as xfs_db does for a label change), then
2072 * invalidate the block device page cache. This is so that any prior
2073 * buffered reads from userspace (i.e. from blkid) are invalidated,
2074 * and userspace will see the newly-written label.
2076 error = xfs_sync_sb_buf(mp);
2080 * growfs also updates backup supers so lock against that.
2082 mutex_lock(&mp->m_growlock);
2083 error = xfs_update_secondary_sbs(mp);
2084 mutex_unlock(&mp->m_growlock);
2086 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
2089 mnt_drop_write_file(filp);
2094 * Note: some of the ioctl's return positive numbers as a
2095 * byte count indicating success, such as readlink_by_handle.
2096 * So we don't "sign flip" like most other routines. This means
2097 * true errors need to be returned as a negative value.
2105 struct inode *inode = file_inode(filp);
2106 struct xfs_inode *ip = XFS_I(inode);
2107 struct xfs_mount *mp = ip->i_mount;
2108 void __user *arg = (void __user *)p;
2111 trace_xfs_file_ioctl(ip);
2115 return xfs_ioc_trim(mp, arg);
2116 case FS_IOC_GETFSLABEL:
2117 return xfs_ioc_getlabel(mp, arg);
2118 case FS_IOC_SETFSLABEL:
2119 return xfs_ioc_setlabel(filp, mp, arg);
2120 case XFS_IOC_ALLOCSP:
2121 case XFS_IOC_FREESP:
2122 case XFS_IOC_RESVSP:
2123 case XFS_IOC_UNRESVSP:
2124 case XFS_IOC_ALLOCSP64:
2125 case XFS_IOC_FREESP64:
2126 case XFS_IOC_RESVSP64:
2127 case XFS_IOC_UNRESVSP64:
2128 case XFS_IOC_ZERO_RANGE: {
2131 if (copy_from_user(&bf, arg, sizeof(bf)))
2133 return xfs_ioc_space(filp, cmd, &bf);
2135 case XFS_IOC_DIOINFO: {
2137 xfs_buftarg_t *target =
2138 XFS_IS_REALTIME_INODE(ip) ?
2139 mp->m_rtdev_targp : mp->m_ddev_targp;
2141 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
2142 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
2144 if (copy_to_user(arg, &da, sizeof(da)))
2149 case XFS_IOC_FSBULKSTAT_SINGLE:
2150 case XFS_IOC_FSBULKSTAT:
2151 case XFS_IOC_FSINUMBERS:
2152 return xfs_ioc_fsbulkstat(mp, cmd, arg);
2154 case XFS_IOC_BULKSTAT:
2155 return xfs_ioc_bulkstat(mp, cmd, arg);
2156 case XFS_IOC_INUMBERS:
2157 return xfs_ioc_inumbers(mp, cmd, arg);
2159 case XFS_IOC_FSGEOMETRY_V1:
2160 return xfs_ioc_fsgeometry(mp, arg, 3);
2161 case XFS_IOC_FSGEOMETRY_V4:
2162 return xfs_ioc_fsgeometry(mp, arg, 4);
2163 case XFS_IOC_FSGEOMETRY:
2164 return xfs_ioc_fsgeometry(mp, arg, 5);
2166 case XFS_IOC_AG_GEOMETRY:
2167 return xfs_ioc_ag_geometry(mp, arg);
2169 case XFS_IOC_GETVERSION:
2170 return put_user(inode->i_generation, (int __user *)arg);
2172 case XFS_IOC_FSGETXATTR:
2173 return xfs_ioc_fsgetxattr(ip, 0, arg);
2174 case XFS_IOC_FSGETXATTRA:
2175 return xfs_ioc_fsgetxattr(ip, 1, arg);
2176 case XFS_IOC_FSSETXATTR:
2177 return xfs_ioc_fssetxattr(ip, filp, arg);
2178 case XFS_IOC_GETXFLAGS:
2179 return xfs_ioc_getxflags(ip, arg);
2180 case XFS_IOC_SETXFLAGS:
2181 return xfs_ioc_setxflags(ip, filp, arg);
2183 case XFS_IOC_FSSETDM: {
2184 struct fsdmidata dmi;
2186 if (copy_from_user(&dmi, arg, sizeof(dmi)))
2189 error = mnt_want_write_file(filp);
2193 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
2195 mnt_drop_write_file(filp);
2199 case XFS_IOC_GETBMAP:
2200 case XFS_IOC_GETBMAPA:
2201 case XFS_IOC_GETBMAPX:
2202 return xfs_ioc_getbmap(filp, cmd, arg);
2204 case FS_IOC_GETFSMAP:
2205 return xfs_ioc_getfsmap(ip, arg);
2207 case XFS_IOC_SCRUB_METADATA:
2208 return xfs_ioc_scrub_metadata(ip, arg);
2210 case XFS_IOC_FD_TO_HANDLE:
2211 case XFS_IOC_PATH_TO_HANDLE:
2212 case XFS_IOC_PATH_TO_FSHANDLE: {
2213 xfs_fsop_handlereq_t hreq;
2215 if (copy_from_user(&hreq, arg, sizeof(hreq)))
2217 return xfs_find_handle(cmd, &hreq);
2219 case XFS_IOC_OPEN_BY_HANDLE: {
2220 xfs_fsop_handlereq_t hreq;
2222 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2224 return xfs_open_by_handle(filp, &hreq);
2226 case XFS_IOC_FSSETDM_BY_HANDLE:
2227 return xfs_fssetdm_by_handle(filp, arg);
2229 case XFS_IOC_READLINK_BY_HANDLE: {
2230 xfs_fsop_handlereq_t hreq;
2232 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
2234 return xfs_readlink_by_handle(filp, &hreq);
2236 case XFS_IOC_ATTRLIST_BY_HANDLE:
2237 return xfs_attrlist_by_handle(filp, arg);
2239 case XFS_IOC_ATTRMULTI_BY_HANDLE:
2240 return xfs_attrmulti_by_handle(filp, arg);
2242 case XFS_IOC_SWAPEXT: {
2243 struct xfs_swapext sxp;
2245 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
2247 error = mnt_want_write_file(filp);
2250 error = xfs_ioc_swapext(&sxp);
2251 mnt_drop_write_file(filp);
2255 case XFS_IOC_FSCOUNTS: {
2256 xfs_fsop_counts_t out;
2258 xfs_fs_counts(mp, &out);
2260 if (copy_to_user(arg, &out, sizeof(out)))
2265 case XFS_IOC_SET_RESBLKS: {
2266 xfs_fsop_resblks_t inout;
2269 if (!capable(CAP_SYS_ADMIN))
2272 if (mp->m_flags & XFS_MOUNT_RDONLY)
2275 if (copy_from_user(&inout, arg, sizeof(inout)))
2278 error = mnt_want_write_file(filp);
2282 /* input parameter is passed in resblks field of structure */
2284 error = xfs_reserve_blocks(mp, &in, &inout);
2285 mnt_drop_write_file(filp);
2289 if (copy_to_user(arg, &inout, sizeof(inout)))
2294 case XFS_IOC_GET_RESBLKS: {
2295 xfs_fsop_resblks_t out;
2297 if (!capable(CAP_SYS_ADMIN))
2300 error = xfs_reserve_blocks(mp, NULL, &out);
2304 if (copy_to_user(arg, &out, sizeof(out)))
2310 case XFS_IOC_FSGROWFSDATA: {
2311 xfs_growfs_data_t in;
2313 if (copy_from_user(&in, arg, sizeof(in)))
2316 error = mnt_want_write_file(filp);
2319 error = xfs_growfs_data(mp, &in);
2320 mnt_drop_write_file(filp);
2324 case XFS_IOC_FSGROWFSLOG: {
2325 xfs_growfs_log_t in;
2327 if (copy_from_user(&in, arg, sizeof(in)))
2330 error = mnt_want_write_file(filp);
2333 error = xfs_growfs_log(mp, &in);
2334 mnt_drop_write_file(filp);
2338 case XFS_IOC_FSGROWFSRT: {
2341 if (copy_from_user(&in, arg, sizeof(in)))
2344 error = mnt_want_write_file(filp);
2347 error = xfs_growfs_rt(mp, &in);
2348 mnt_drop_write_file(filp);
2352 case XFS_IOC_GOINGDOWN: {
2355 if (!capable(CAP_SYS_ADMIN))
2358 if (get_user(in, (uint32_t __user *)arg))
2361 return xfs_fs_goingdown(mp, in);
2364 case XFS_IOC_ERROR_INJECTION: {
2365 xfs_error_injection_t in;
2367 if (!capable(CAP_SYS_ADMIN))
2370 if (copy_from_user(&in, arg, sizeof(in)))
2373 return xfs_errortag_add(mp, in.errtag);
2376 case XFS_IOC_ERROR_CLEARALL:
2377 if (!capable(CAP_SYS_ADMIN))
2380 return xfs_errortag_clearall(mp);
2382 case XFS_IOC_FREE_EOFBLOCKS: {
2383 struct xfs_fs_eofblocks eofb;
2384 struct xfs_eofblocks keofb;
2386 if (!capable(CAP_SYS_ADMIN))
2389 if (mp->m_flags & XFS_MOUNT_RDONLY)
2392 if (copy_from_user(&eofb, arg, sizeof(eofb)))
2395 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
2399 return xfs_icache_free_eofblocks(mp, &keofb);