blob: 21d9c9df9fb72fa0695cc2e2f4a87a0a6550209a [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include "xfs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include "xfs_fs.h"
Dave Chinner6ca1c902013-08-12 20:49:26 +100020#include "xfs_format.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include "xfs_log.h"
22#include "xfs_trans.h"
23#include "xfs_sb.h"
Nathan Scotta844f452005-11-02 14:38:42 +110024#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include "xfs_alloc.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include "xfs_mount.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "xfs_bmap_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include "xfs_dinode.h"
29#include "xfs_inode.h"
Hannes Eder7bf446f2009-03-05 15:20:25 +010030#include "xfs_ioctl.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include "xfs_rtalloc.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include "xfs_itable.h"
Nathan Scotta844f452005-11-02 14:38:42 +110033#include "xfs_error.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include "xfs_attr.h"
Nathan Scotta844f452005-11-02 14:38:42 +110035#include "xfs_bmap.h"
Dave Chinner68988112013-08-12 20:49:42 +100036#include "xfs_bmap_util.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include "xfs_buf_item.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include "xfs_fsops.h"
Christoph Hellwiga46db602011-01-07 13:02:04 +000039#include "xfs_discard.h"
Christoph Hellwig25fe55e2008-07-18 17:13:20 +100040#include "xfs_quota.h"
41#include "xfs_inode_item.h"
Christoph Hellwigd296d302009-01-19 02:02:57 +010042#include "xfs_export.h"
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000043#include "xfs_trace.h"
Brian Foster8ca149d2012-11-07 12:21:12 -050044#include "xfs_icache.h"
Dave Chinnerc24b5df2013-08-12 20:49:45 +100045#include "xfs_symlink.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
Randy Dunlap16f7e0f2006-01-11 12:17:46 -080047#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#include <linux/dcache.h>
49#include <linux/mount.h>
50#include <linux/namei.h>
51#include <linux/pagemap.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090052#include <linux/slab.h>
Christoph Hellwigd296d302009-01-19 02:02:57 +010053#include <linux/exportfs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
55/*
56 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
57 * a file or fs handle.
58 *
59 * XFS_IOC_PATH_TO_FSHANDLE
60 * returns fs handle for a mount point or path within that mount point
61 * XFS_IOC_FD_TO_HANDLE
62 * returns full handle for a FD opened in user space
63 * XFS_IOC_PATH_TO_HANDLE
64 * returns full handle for a path
65 */
sandeen@sandeen.netd5547f92008-11-25 21:20:08 -060066int
Linus Torvalds1da177e2005-04-16 15:20:36 -070067xfs_find_handle(
68 unsigned int cmd,
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -060069 xfs_fsop_handlereq_t *hreq)
Linus Torvalds1da177e2005-04-16 15:20:36 -070070{
71 int hsize;
72 xfs_handle_t handle;
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 struct inode *inode;
Dave Chinnera30b0362013-09-02 20:49:36 +100074 struct fd f = {NULL};
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010075 struct path path;
Al Viro2903ff02012-08-28 12:52:22 -040076 int error;
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010077 struct xfs_inode *ip;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010079 if (cmd == XFS_IOC_FD_TO_HANDLE) {
Al Viro2903ff02012-08-28 12:52:22 -040080 f = fdget(hreq->fd);
81 if (!f.file)
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010082 return -EBADF;
Al Viro496ad9a2013-01-23 17:07:38 -050083 inode = file_inode(f.file);
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010084 } else {
85 error = user_lpath((const char __user *)hreq->path, &path);
86 if (error)
87 return error;
88 inode = path.dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 }
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010090 ip = XFS_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010092 /*
93 * We can only generate handles for inodes residing on a XFS filesystem,
94 * and only for regular files, directories or symbolic links.
95 */
96 error = -EINVAL;
97 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
98 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100100 error = -EBADF;
101 if (!S_ISREG(inode->i_mode) &&
102 !S_ISDIR(inode->i_mode) &&
103 !S_ISLNK(inode->i_mode))
104 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100107 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100109 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
110 /*
111 * This handle only contains an fsid, zero the rest.
112 */
113 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
114 hsize = sizeof(xfs_fsid_t);
115 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 int lock_mode;
117
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 lock_mode = xfs_ilock_map_shared(ip);
Christoph Hellwigc6143912007-09-14 15:22:37 +1000119 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
120 sizeof(handle.ha_fid.fid_len);
121 handle.ha_fid.fid_pad = 0;
122 handle.ha_fid.fid_gen = ip->i_d.di_gen;
123 handle.ha_fid.fid_ino = ip->i_ino;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 xfs_iunlock_map_shared(ip, lock_mode);
125
126 hsize = XFS_HSIZE(handle);
127 }
128
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100129 error = -EFAULT;
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600130 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100131 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
132 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100134 error = 0;
135
136 out_put:
137 if (cmd == XFS_IOC_FD_TO_HANDLE)
Al Viro2903ff02012-08-28 12:52:22 -0400138 fdput(f);
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100139 else
140 path_put(&path);
141 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142}
143
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144/*
Christoph Hellwigd296d302009-01-19 02:02:57 +0100145 * No need to do permission checks on the various pathname components
146 * as the handle operations are privileged.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 */
148STATIC int
Christoph Hellwigd296d302009-01-19 02:02:57 +0100149xfs_handle_acceptable(
150 void *context,
151 struct dentry *dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152{
Christoph Hellwigd296d302009-01-19 02:02:57 +0100153 return 1;
154}
155
156/*
157 * Convert userspace handle data into a dentry.
158 */
159struct dentry *
160xfs_handle_to_dentry(
161 struct file *parfilp,
162 void __user *uhandle,
163 u32 hlen)
164{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 xfs_handle_t handle;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100166 struct xfs_fid64 fid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167
168 /*
169 * Only allow handle opens under a directory.
170 */
Al Viro496ad9a2013-01-23 17:07:38 -0500171 if (!S_ISDIR(file_inode(parfilp)->i_mode))
Christoph Hellwigd296d302009-01-19 02:02:57 +0100172 return ERR_PTR(-ENOTDIR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
Christoph Hellwigd296d302009-01-19 02:02:57 +0100174 if (hlen != sizeof(xfs_handle_t))
175 return ERR_PTR(-EINVAL);
176 if (copy_from_user(&handle, uhandle, hlen))
177 return ERR_PTR(-EFAULT);
178 if (handle.ha_fid.fid_len !=
179 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
180 return ERR_PTR(-EINVAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
Christoph Hellwigd296d302009-01-19 02:02:57 +0100182 memset(&fid, 0, sizeof(struct fid));
183 fid.ino = handle.ha_fid.fid_ino;
184 fid.gen = handle.ha_fid.fid_gen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185
Christoph Hellwigd296d302009-01-19 02:02:57 +0100186 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
187 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
188 xfs_handle_acceptable, NULL);
189}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190
Christoph Hellwigd296d302009-01-19 02:02:57 +0100191STATIC struct dentry *
192xfs_handlereq_to_dentry(
193 struct file *parfilp,
194 xfs_fsop_handlereq_t *hreq)
195{
196 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197}
198
sandeen@sandeen.netd5547f92008-11-25 21:20:08 -0600199int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200xfs_open_by_handle(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 struct file *parfilp,
Christoph Hellwigd296d302009-01-19 02:02:57 +0100202 xfs_fsop_handlereq_t *hreq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203{
David Howells745ca242008-11-14 10:39:22 +1100204 const struct cred *cred = current_cred();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 int error;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100206 int fd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 int permflag;
208 struct file *filp;
209 struct inode *inode;
210 struct dentry *dentry;
Dave Chinner1a1d7722012-03-22 05:15:06 +0000211 fmode_t fmode;
Al Viro765927b2012-06-26 21:58:53 +0400212 struct path path;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213
214 if (!capable(CAP_SYS_ADMIN))
215 return -XFS_ERROR(EPERM);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216
Christoph Hellwigd296d302009-01-19 02:02:57 +0100217 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
218 if (IS_ERR(dentry))
219 return PTR_ERR(dentry);
220 inode = dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221
222 /* Restrict xfs_open_by_handle to directories & regular files. */
223 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
Christoph Hellwigd296d302009-01-19 02:02:57 +0100224 error = -XFS_ERROR(EPERM);
225 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 }
227
228#if BITS_PER_LONG != 32
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600229 hreq->oflags |= O_LARGEFILE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230#endif
Christoph Hellwigd296d302009-01-19 02:02:57 +0100231
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600232 permflag = hreq->oflags;
Dave Chinner1a1d7722012-03-22 05:15:06 +0000233 fmode = OPEN_FMODE(permflag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
Dave Chinner1a1d7722012-03-22 05:15:06 +0000235 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
Christoph Hellwigd296d302009-01-19 02:02:57 +0100236 error = -XFS_ERROR(EPERM);
237 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 }
239
Dave Chinner1a1d7722012-03-22 05:15:06 +0000240 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
Christoph Hellwigd296d302009-01-19 02:02:57 +0100241 error = -XFS_ERROR(EACCES);
242 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 }
244
245 /* Can't write directories. */
Dave Chinner1a1d7722012-03-22 05:15:06 +0000246 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
Christoph Hellwigd296d302009-01-19 02:02:57 +0100247 error = -XFS_ERROR(EISDIR);
248 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 }
250
Yann Droneaud862a6292013-07-02 18:39:34 +0200251 fd = get_unused_fd_flags(0);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100252 if (fd < 0) {
253 error = fd;
254 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 }
256
Al Viro765927b2012-06-26 21:58:53 +0400257 path.mnt = parfilp->f_path.mnt;
258 path.dentry = dentry;
259 filp = dentry_open(&path, hreq->oflags, cred);
260 dput(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 if (IS_ERR(filp)) {
Christoph Hellwigd296d302009-01-19 02:02:57 +0100262 put_unused_fd(fd);
263 return PTR_ERR(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 }
Christoph Hellwig4d4be482008-12-09 04:47:33 -0500265
Al Viro03209372011-07-25 20:54:24 -0400266 if (S_ISREG(inode->i_mode)) {
Vlad Apostolov2e2e7bb2006-11-11 18:04:47 +1100267 filp->f_flags |= O_NOATIME;
Christoph Hellwig4d4be482008-12-09 04:47:33 -0500268 filp->f_mode |= FMODE_NOCMTIME;
Vlad Apostolov2e2e7bb2006-11-11 18:04:47 +1100269 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270
Christoph Hellwigd296d302009-01-19 02:02:57 +0100271 fd_install(fd, filp);
272 return fd;
273
274 out_dput:
275 dput(dentry);
276 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277}
278
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000279/*
280 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
281 * unused first argument.
282 */
283STATIC int
284do_readlink(
285 char __user *buffer,
286 int buflen,
287 const char *link)
288{
289 int len;
290
291 len = PTR_ERR(link);
292 if (IS_ERR(link))
293 goto out;
294
295 len = strlen(link);
296 if (len > (unsigned) buflen)
297 len = buflen;
298 if (copy_to_user(buffer, link, len))
299 len = -EFAULT;
300 out:
301 return len;
302}
303
304
sandeen@sandeen.netd5547f92008-11-25 21:20:08 -0600305int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306xfs_readlink_by_handle(
Christoph Hellwigd296d302009-01-19 02:02:57 +0100307 struct file *parfilp,
308 xfs_fsop_handlereq_t *hreq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309{
Christoph Hellwigd296d302009-01-19 02:02:57 +0100310 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 __u32 olen;
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000312 void *link;
313 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314
315 if (!capable(CAP_SYS_ADMIN))
316 return -XFS_ERROR(EPERM);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317
Christoph Hellwigd296d302009-01-19 02:02:57 +0100318 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
319 if (IS_ERR(dentry))
320 return PTR_ERR(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321
322 /* Restrict this handle operation to symlinks only. */
Christoph Hellwigd296d302009-01-19 02:02:57 +0100323 if (!S_ISLNK(dentry->d_inode->i_mode)) {
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000324 error = -XFS_ERROR(EINVAL);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100325 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 }
327
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600328 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000329 error = -XFS_ERROR(EFAULT);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100330 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000333 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100334 if (!link) {
335 error = -XFS_ERROR(ENOMEM);
336 goto out_dput;
337 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
Christoph Hellwigd296d302009-01-19 02:02:57 +0100339 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
Nathan Scott67fcaa72006-06-09 17:00:52 +1000340 if (error)
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000341 goto out_kfree;
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600342 error = do_readlink(hreq->ohandle, olen, link);
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000343 if (error)
344 goto out_kfree;
Nathan Scott67fcaa72006-06-09 17:00:52 +1000345
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000346 out_kfree:
347 kfree(link);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100348 out_dput:
349 dput(dentry);
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000350 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351}
352
Dave Chinnerc24b5df2013-08-12 20:49:45 +1000353int
354xfs_set_dmattrs(
355 xfs_inode_t *ip,
356 u_int evmask,
357 u_int16_t state)
358{
359 xfs_mount_t *mp = ip->i_mount;
360 xfs_trans_t *tp;
361 int error;
362
363 if (!capable(CAP_SYS_ADMIN))
364 return XFS_ERROR(EPERM);
365
366 if (XFS_FORCED_SHUTDOWN(mp))
367 return XFS_ERROR(EIO);
368
369 tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS);
Jie Liu3d3c8b52013-08-12 20:49:59 +1000370 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
Dave Chinnerc24b5df2013-08-12 20:49:45 +1000371 if (error) {
372 xfs_trans_cancel(tp, 0);
373 return error;
374 }
375 xfs_ilock(ip, XFS_ILOCK_EXCL);
376 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
377
378 ip->i_d.di_dmevmask = evmask;
379 ip->i_d.di_dmstate = state;
380
381 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
382 error = xfs_trans_commit(tp, 0);
383
384 return error;
385}
386
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387STATIC int
388xfs_fssetdm_by_handle(
Christoph Hellwigd296d302009-01-19 02:02:57 +0100389 struct file *parfilp,
390 void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391{
392 int error;
393 struct fsdmidata fsd;
394 xfs_fsop_setdm_handlereq_t dmhreq;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100395 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396
397 if (!capable(CAP_MKNOD))
398 return -XFS_ERROR(EPERM);
399 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
400 return -XFS_ERROR(EFAULT);
401
Jan Karad9457dc2012-06-12 16:20:39 +0200402 error = mnt_want_write_file(parfilp);
403 if (error)
404 return error;
405
Christoph Hellwigd296d302009-01-19 02:02:57 +0100406 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
Jan Karad9457dc2012-06-12 16:20:39 +0200407 if (IS_ERR(dentry)) {
408 mnt_drop_write_file(parfilp);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100409 return PTR_ERR(dentry);
Jan Karad9457dc2012-06-12 16:20:39 +0200410 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411
Christoph Hellwigd296d302009-01-19 02:02:57 +0100412 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000413 error = -XFS_ERROR(EPERM);
414 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 }
416
417 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000418 error = -XFS_ERROR(EFAULT);
419 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 }
421
Christoph Hellwigd296d302009-01-19 02:02:57 +0100422 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000423 fsd.fsd_dmstate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000425 out:
Jan Karad9457dc2012-06-12 16:20:39 +0200426 mnt_drop_write_file(parfilp);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100427 dput(dentry);
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000428 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429}
430
431STATIC int
432xfs_attrlist_by_handle(
Christoph Hellwigd296d302009-01-19 02:02:57 +0100433 struct file *parfilp,
434 void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435{
Christoph Hellwigd296d302009-01-19 02:02:57 +0100436 int error = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 attrlist_cursor_kern_t *cursor;
438 xfs_fsop_attrlist_handlereq_t al_hreq;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100439 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 char *kbuf;
441
442 if (!capable(CAP_SYS_ADMIN))
443 return -XFS_ERROR(EPERM);
444 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
445 return -XFS_ERROR(EFAULT);
446 if (al_hreq.buflen > XATTR_LIST_MAX)
447 return -XFS_ERROR(EINVAL);
448
Christoph Hellwig90ad58a2008-06-27 13:32:19 +1000449 /*
450 * Reject flags, only allow namespaces.
451 */
452 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
453 return -XFS_ERROR(EINVAL);
454
Christoph Hellwigd296d302009-01-19 02:02:57 +0100455 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
456 if (IS_ERR(dentry))
457 return PTR_ERR(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458
Eric Sandeendd700d92013-04-04 00:05:13 -0500459 kbuf = kmem_zalloc(al_hreq.buflen, KM_SLEEP | KM_MAYFAIL);
460 if (!kbuf) {
461 kbuf = kmem_zalloc_large(al_hreq.buflen);
462 if (!kbuf)
463 goto out_dput;
464 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465
466 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100467 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000468 al_hreq.flags, cursor);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 if (error)
470 goto out_kfree;
471
472 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
473 error = -EFAULT;
474
475 out_kfree:
Eric Sandeendd700d92013-04-04 00:05:13 -0500476 if (is_vmalloc_addr(kbuf))
477 kmem_free_large(kbuf);
478 else
479 kmem_free(kbuf);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100480 out_dput:
481 dput(dentry);
482 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483}
484
sandeen@sandeen.net28750972008-11-25 21:20:15 -0600485int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486xfs_attrmulti_attr_get(
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000487 struct inode *inode,
Dave Chinnera9273ca2010-01-20 10:47:48 +1100488 unsigned char *name,
489 unsigned char __user *ubuf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 __uint32_t *len,
491 __uint32_t flags)
492{
Dave Chinnera9273ca2010-01-20 10:47:48 +1100493 unsigned char *kbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 int error = EFAULT;
Barry Naujoke8b0eba2008-04-22 17:34:31 +1000495
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 if (*len > XATTR_SIZE_MAX)
497 return EINVAL;
Dave Chinnerad650f52012-03-07 04:50:21 +0000498 kbuf = kmem_zalloc(*len, KM_SLEEP | KM_MAYFAIL);
499 if (!kbuf) {
500 kbuf = kmem_zalloc_large(*len);
501 if (!kbuf)
502 return ENOMEM;
503 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504
Barry Naujoke8b0eba2008-04-22 17:34:31 +1000505 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 if (error)
507 goto out_kfree;
508
509 if (copy_to_user(ubuf, kbuf, *len))
510 error = EFAULT;
511
512 out_kfree:
Dave Chinnerad650f52012-03-07 04:50:21 +0000513 if (is_vmalloc_addr(kbuf))
514 kmem_free_large(kbuf);
515 else
516 kmem_free(kbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 return error;
518}
519
sandeen@sandeen.net28750972008-11-25 21:20:15 -0600520int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521xfs_attrmulti_attr_set(
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000522 struct inode *inode,
Dave Chinnera9273ca2010-01-20 10:47:48 +1100523 unsigned char *name,
524 const unsigned char __user *ubuf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 __uint32_t len,
526 __uint32_t flags)
527{
Dave Chinnera9273ca2010-01-20 10:47:48 +1100528 unsigned char *kbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 int error = EFAULT;
530
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000531 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 return EPERM;
533 if (len > XATTR_SIZE_MAX)
534 return EINVAL;
535
Li Zefan0e639bd2009-04-08 15:08:04 +0800536 kbuf = memdup_user(ubuf, len);
537 if (IS_ERR(kbuf))
538 return PTR_ERR(kbuf);
Barry Naujoke8b0eba2008-04-22 17:34:31 +1000539
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000540 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 return error;
543}
544
sandeen@sandeen.net28750972008-11-25 21:20:15 -0600545int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546xfs_attrmulti_attr_remove(
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000547 struct inode *inode,
Dave Chinnera9273ca2010-01-20 10:47:48 +1100548 unsigned char *name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 __uint32_t flags)
550{
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000551 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 return EPERM;
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000553 return xfs_attr_remove(XFS_I(inode), name, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554}
555
556STATIC int
557xfs_attrmulti_by_handle(
Dave Hansen42a74f22008-02-15 14:37:46 -0800558 struct file *parfilp,
Christoph Hellwigd296d302009-01-19 02:02:57 +0100559 void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560{
561 int error;
562 xfs_attr_multiop_t *ops;
563 xfs_fsop_attrmulti_handlereq_t am_hreq;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100564 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 unsigned int i, size;
Dave Chinnera9273ca2010-01-20 10:47:48 +1100566 unsigned char *attr_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567
568 if (!capable(CAP_SYS_ADMIN))
569 return -XFS_ERROR(EPERM);
570 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
571 return -XFS_ERROR(EFAULT);
572
Zhitong Wangfda168c2010-03-23 09:51:22 +1100573 /* overflow check */
574 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
575 return -E2BIG;
576
Christoph Hellwigd296d302009-01-19 02:02:57 +0100577 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
578 if (IS_ERR(dentry))
579 return PTR_ERR(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580
581 error = E2BIG;
Christoph Hellwige182f572008-06-27 13:32:31 +1000582 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 if (!size || size > 16 * PAGE_SIZE)
Christoph Hellwigd296d302009-01-19 02:02:57 +0100584 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585
Li Zefan0e639bd2009-04-08 15:08:04 +0800586 ops = memdup_user(am_hreq.ops, size);
587 if (IS_ERR(ops)) {
588 error = PTR_ERR(ops);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100589 goto out_dput;
Li Zefan0e639bd2009-04-08 15:08:04 +0800590 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591
592 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
593 if (!attr_name)
594 goto out_kfree_ops;
595
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 error = 0;
597 for (i = 0; i < am_hreq.opcount; i++) {
Dave Chinnera9273ca2010-01-20 10:47:48 +1100598 ops[i].am_error = strncpy_from_user((char *)attr_name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599 ops[i].am_attrname, MAXNAMELEN);
600 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
601 error = -ERANGE;
602 if (ops[i].am_error < 0)
603 break;
604
605 switch (ops[i].am_opcode) {
606 case ATTR_OP_GET:
Christoph Hellwigd296d302009-01-19 02:02:57 +0100607 ops[i].am_error = xfs_attrmulti_attr_get(
608 dentry->d_inode, attr_name,
609 ops[i].am_attrvalue, &ops[i].am_length,
610 ops[i].am_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 break;
612 case ATTR_OP_SET:
Al Viroa561be72011-11-23 11:57:51 -0500613 ops[i].am_error = mnt_want_write_file(parfilp);
Dave Hansen42a74f22008-02-15 14:37:46 -0800614 if (ops[i].am_error)
615 break;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100616 ops[i].am_error = xfs_attrmulti_attr_set(
617 dentry->d_inode, attr_name,
618 ops[i].am_attrvalue, ops[i].am_length,
619 ops[i].am_flags);
Al Viro2a79f172011-12-09 08:06:57 -0500620 mnt_drop_write_file(parfilp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 break;
622 case ATTR_OP_REMOVE:
Al Viroa561be72011-11-23 11:57:51 -0500623 ops[i].am_error = mnt_want_write_file(parfilp);
Dave Hansen42a74f22008-02-15 14:37:46 -0800624 if (ops[i].am_error)
625 break;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100626 ops[i].am_error = xfs_attrmulti_attr_remove(
627 dentry->d_inode, attr_name,
628 ops[i].am_flags);
Al Viro2a79f172011-12-09 08:06:57 -0500629 mnt_drop_write_file(parfilp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 break;
631 default:
632 ops[i].am_error = EINVAL;
633 }
634 }
635
636 if (copy_to_user(am_hreq.ops, ops, size))
637 error = XFS_ERROR(EFAULT);
638
639 kfree(attr_name);
640 out_kfree_ops:
641 kfree(ops);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100642 out_dput:
643 dput(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 return -error;
645}
646
sandeen@sandeen.netd5547f92008-11-25 21:20:08 -0600647int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648xfs_ioc_space(
Christoph Hellwig993386c2007-08-28 16:12:30 +1000649 struct xfs_inode *ip,
Alexey Dobriyanf37ea142006-09-28 10:52:04 +1000650 struct inode *inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 struct file *filp,
652 int ioflags,
653 unsigned int cmd,
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600654 xfs_flock64_t *bf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 int attr_flags = 0;
657 int error;
658
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600659 /*
660 * Only allow the sys admin to reserve space unless
661 * unwritten extents are enabled.
662 */
663 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
664 !capable(CAP_SYS_ADMIN))
665 return -XFS_ERROR(EPERM);
666
Alexey Dobriyanf37ea142006-09-28 10:52:04 +1000667 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 return -XFS_ERROR(EPERM);
669
Eric Sandeenad4a8ac2005-09-02 16:41:16 +1000670 if (!(filp->f_mode & FMODE_WRITE))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 return -XFS_ERROR(EBADF);
672
Alexey Dobriyanf37ea142006-09-28 10:52:04 +1000673 if (!S_ISREG(inode->i_mode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 return -XFS_ERROR(EINVAL);
675
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
Christoph Hellwig0f285c82008-07-18 17:13:28 +1000677 attr_flags |= XFS_ATTR_NONBLOCK;
Dave Chinner82878892011-03-26 09:13:08 +1100678
679 if (filp->f_flags & O_DSYNC)
680 attr_flags |= XFS_ATTR_SYNC;
681
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 if (ioflags & IO_INVIS)
Christoph Hellwig0f285c82008-07-18 17:13:28 +1000683 attr_flags |= XFS_ATTR_DMI;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684
Jan Karad9457dc2012-06-12 16:20:39 +0200685 error = mnt_want_write_file(filp);
686 if (error)
687 return error;
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600688 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
Jan Karad9457dc2012-06-12 16:20:39 +0200689 mnt_drop_write_file(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 return -error;
691}
692
693STATIC int
694xfs_ioc_bulkstat(
695 xfs_mount_t *mp,
696 unsigned int cmd,
697 void __user *arg)
698{
699 xfs_fsop_bulkreq_t bulkreq;
700 int count; /* # of records returned */
701 xfs_ino_t inlast; /* last inode number */
702 int done;
703 int error;
704
705 /* done = 1 if there are more stats to get and if bulkstat */
706 /* should be called again (unused here, but used in dmapi) */
707
708 if (!capable(CAP_SYS_ADMIN))
709 return -EPERM;
710
711 if (XFS_FORCED_SHUTDOWN(mp))
712 return -XFS_ERROR(EIO);
713
714 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
715 return -XFS_ERROR(EFAULT);
716
717 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
718 return -XFS_ERROR(EFAULT);
719
720 if ((count = bulkreq.icount) <= 0)
721 return -XFS_ERROR(EINVAL);
722
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100723 if (bulkreq.ubuffer == NULL)
724 return -XFS_ERROR(EINVAL);
725
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 if (cmd == XFS_IOC_FSINUMBERS)
727 error = xfs_inumbers(mp, &inlast, &count,
Michal Marekfaa63e92007-07-11 11:10:19 +1000728 bulkreq.ubuffer, xfs_inumbers_fmt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
730 error = xfs_bulkstat_single(mp, &inlast,
731 bulkreq.ubuffer, &done);
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100732 else /* XFS_IOC_FSBULKSTAT */
Christoph Hellwig7dce11d2010-06-23 18:11:11 +1000733 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
734 sizeof(xfs_bstat_t), bulkreq.ubuffer,
735 &done);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736
737 if (error)
738 return -error;
739
740 if (bulkreq.ocount != NULL) {
741 if (copy_to_user(bulkreq.lastip, &inlast,
742 sizeof(xfs_ino_t)))
743 return -XFS_ERROR(EFAULT);
744
745 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
746 return -XFS_ERROR(EFAULT);
747 }
748
749 return 0;
750}
751
752STATIC int
753xfs_ioc_fsgeometry_v1(
754 xfs_mount_t *mp,
755 void __user *arg)
756{
Alex Eldereeb20362011-03-01 17:50:00 +0000757 xfs_fsop_geom_t fsgeo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 int error;
759
Alex Eldereeb20362011-03-01 17:50:00 +0000760 error = xfs_fs_geometry(mp, &fsgeo, 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 if (error)
762 return -error;
763
Alex Eldereeb20362011-03-01 17:50:00 +0000764 /*
765 * Caller should have passed an argument of type
766 * xfs_fsop_geom_v1_t. This is a proper subset of the
767 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
768 */
769 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 return -XFS_ERROR(EFAULT);
771 return 0;
772}
773
774STATIC int
775xfs_ioc_fsgeometry(
776 xfs_mount_t *mp,
777 void __user *arg)
778{
779 xfs_fsop_geom_t fsgeo;
780 int error;
781
782 error = xfs_fs_geometry(mp, &fsgeo, 4);
783 if (error)
784 return -error;
785
786 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
787 return -XFS_ERROR(EFAULT);
788 return 0;
789}
790
791/*
792 * Linux extended inode flags interface.
793 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794
795STATIC unsigned int
796xfs_merge_ioc_xflags(
797 unsigned int flags,
798 unsigned int start)
799{
800 unsigned int xflags = start;
801
Eric Sandeen39058a02007-02-10 18:37:10 +1100802 if (flags & FS_IMMUTABLE_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803 xflags |= XFS_XFLAG_IMMUTABLE;
804 else
805 xflags &= ~XFS_XFLAG_IMMUTABLE;
Eric Sandeen39058a02007-02-10 18:37:10 +1100806 if (flags & FS_APPEND_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 xflags |= XFS_XFLAG_APPEND;
808 else
809 xflags &= ~XFS_XFLAG_APPEND;
Eric Sandeen39058a02007-02-10 18:37:10 +1100810 if (flags & FS_SYNC_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 xflags |= XFS_XFLAG_SYNC;
812 else
813 xflags &= ~XFS_XFLAG_SYNC;
Eric Sandeen39058a02007-02-10 18:37:10 +1100814 if (flags & FS_NOATIME_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815 xflags |= XFS_XFLAG_NOATIME;
816 else
817 xflags &= ~XFS_XFLAG_NOATIME;
Eric Sandeen39058a02007-02-10 18:37:10 +1100818 if (flags & FS_NODUMP_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819 xflags |= XFS_XFLAG_NODUMP;
820 else
821 xflags &= ~XFS_XFLAG_NODUMP;
822
823 return xflags;
824}
825
826STATIC unsigned int
827xfs_di2lxflags(
828 __uint16_t di_flags)
829{
830 unsigned int flags = 0;
831
832 if (di_flags & XFS_DIFLAG_IMMUTABLE)
Eric Sandeen39058a02007-02-10 18:37:10 +1100833 flags |= FS_IMMUTABLE_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 if (di_flags & XFS_DIFLAG_APPEND)
Eric Sandeen39058a02007-02-10 18:37:10 +1100835 flags |= FS_APPEND_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 if (di_flags & XFS_DIFLAG_SYNC)
Eric Sandeen39058a02007-02-10 18:37:10 +1100837 flags |= FS_SYNC_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 if (di_flags & XFS_DIFLAG_NOATIME)
Eric Sandeen39058a02007-02-10 18:37:10 +1100839 flags |= FS_NOATIME_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840 if (di_flags & XFS_DIFLAG_NODUMP)
Eric Sandeen39058a02007-02-10 18:37:10 +1100841 flags |= FS_NODUMP_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 return flags;
843}
844
845STATIC int
Christoph Hellwigc83bfab2007-10-11 17:47:00 +1000846xfs_ioc_fsgetxattr(
847 xfs_inode_t *ip,
848 int attr,
849 void __user *arg)
850{
851 struct fsxattr fa;
852
Dan Rosenberga122eb22010-09-06 18:24:57 -0400853 memset(&fa, 0, sizeof(struct fsxattr));
854
Christoph Hellwigc83bfab2007-10-11 17:47:00 +1000855 xfs_ilock(ip, XFS_ILOCK_SHARED);
856 fa.fsx_xflags = xfs_ip2xflags(ip);
857 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000858 fa.fsx_projid = xfs_get_projid(ip);
Christoph Hellwigc83bfab2007-10-11 17:47:00 +1000859
860 if (attr) {
861 if (ip->i_afp) {
862 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
863 fa.fsx_nextents = ip->i_afp->if_bytes /
864 sizeof(xfs_bmbt_rec_t);
865 else
866 fa.fsx_nextents = ip->i_d.di_anextents;
867 } else
868 fa.fsx_nextents = 0;
869 } else {
870 if (ip->i_df.if_flags & XFS_IFEXTENTS)
871 fa.fsx_nextents = ip->i_df.if_bytes /
872 sizeof(xfs_bmbt_rec_t);
873 else
874 fa.fsx_nextents = ip->i_d.di_nextents;
875 }
876 xfs_iunlock(ip, XFS_ILOCK_SHARED);
877
878 if (copy_to_user(arg, &fa, sizeof(fa)))
879 return -EFAULT;
880 return 0;
881}
882
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000883STATIC void
884xfs_set_diflags(
885 struct xfs_inode *ip,
886 unsigned int xflags)
887{
888 unsigned int di_flags;
889
890 /* can't set PREALLOC this way, just preserve it */
891 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
892 if (xflags & XFS_XFLAG_IMMUTABLE)
893 di_flags |= XFS_DIFLAG_IMMUTABLE;
894 if (xflags & XFS_XFLAG_APPEND)
895 di_flags |= XFS_DIFLAG_APPEND;
896 if (xflags & XFS_XFLAG_SYNC)
897 di_flags |= XFS_DIFLAG_SYNC;
898 if (xflags & XFS_XFLAG_NOATIME)
899 di_flags |= XFS_DIFLAG_NOATIME;
900 if (xflags & XFS_XFLAG_NODUMP)
901 di_flags |= XFS_DIFLAG_NODUMP;
902 if (xflags & XFS_XFLAG_PROJINHERIT)
903 di_flags |= XFS_DIFLAG_PROJINHERIT;
904 if (xflags & XFS_XFLAG_NODEFRAG)
905 di_flags |= XFS_DIFLAG_NODEFRAG;
906 if (xflags & XFS_XFLAG_FILESTREAM)
907 di_flags |= XFS_DIFLAG_FILESTREAM;
Al Viroabbede12011-07-26 02:31:30 -0400908 if (S_ISDIR(ip->i_d.di_mode)) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000909 if (xflags & XFS_XFLAG_RTINHERIT)
910 di_flags |= XFS_DIFLAG_RTINHERIT;
911 if (xflags & XFS_XFLAG_NOSYMLINKS)
912 di_flags |= XFS_DIFLAG_NOSYMLINKS;
913 if (xflags & XFS_XFLAG_EXTSZINHERIT)
914 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
Al Viroabbede12011-07-26 02:31:30 -0400915 } else if (S_ISREG(ip->i_d.di_mode)) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000916 if (xflags & XFS_XFLAG_REALTIME)
917 di_flags |= XFS_DIFLAG_REALTIME;
918 if (xflags & XFS_XFLAG_EXTSIZE)
919 di_flags |= XFS_DIFLAG_EXTSIZE;
920 }
921
922 ip->i_d.di_flags = di_flags;
923}
924
Christoph Hellwigf13fae22008-07-21 16:16:15 +1000925STATIC void
926xfs_diflags_to_linux(
927 struct xfs_inode *ip)
928{
David Chinnere4f75292008-08-13 16:00:45 +1000929 struct inode *inode = VFS_I(ip);
Christoph Hellwigf13fae22008-07-21 16:16:15 +1000930 unsigned int xflags = xfs_ip2xflags(ip);
931
932 if (xflags & XFS_XFLAG_IMMUTABLE)
933 inode->i_flags |= S_IMMUTABLE;
934 else
935 inode->i_flags &= ~S_IMMUTABLE;
936 if (xflags & XFS_XFLAG_APPEND)
937 inode->i_flags |= S_APPEND;
938 else
939 inode->i_flags &= ~S_APPEND;
940 if (xflags & XFS_XFLAG_SYNC)
941 inode->i_flags |= S_SYNC;
942 else
943 inode->i_flags &= ~S_SYNC;
944 if (xflags & XFS_XFLAG_NOATIME)
945 inode->i_flags |= S_NOATIME;
946 else
947 inode->i_flags &= ~S_NOATIME;
948}
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000949
950#define FSX_PROJID 1
951#define FSX_EXTSIZE 2
952#define FSX_XFLAGS 4
953#define FSX_NONBLOCK 8
954
955STATIC int
956xfs_ioctl_setattr(
957 xfs_inode_t *ip,
958 struct fsxattr *fa,
959 int mask)
960{
961 struct xfs_mount *mp = ip->i_mount;
962 struct xfs_trans *tp;
963 unsigned int lock_flags = 0;
Christoph Hellwig7d095252009-06-08 15:33:32 +0200964 struct xfs_dquot *udqp = NULL;
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -0500965 struct xfs_dquot *pdqp = NULL;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000966 struct xfs_dquot *olddquot = NULL;
967 int code;
968
Christoph Hellwigcca28fb2010-06-24 11:57:09 +1000969 trace_xfs_ioctl_setattr(ip);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000970
971 if (mp->m_flags & XFS_MOUNT_RDONLY)
972 return XFS_ERROR(EROFS);
973 if (XFS_FORCED_SHUTDOWN(mp))
974 return XFS_ERROR(EIO);
975
976 /*
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000977 * Disallow 32bit project ids when projid32bit feature is not enabled.
Arkadiusz Mi?kiewicz23963e52010-08-26 10:19:43 +0000978 */
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000979 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
980 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
Arkadiusz Mi?kiewicz23963e52010-08-26 10:19:43 +0000981 return XFS_ERROR(EINVAL);
982
983 /*
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000984 * If disk quotas is on, we make sure that the dquots do exist on disk,
985 * before we start any other transactions. Trying to do this later
986 * is messy. We don't care to take a readlock to look at the ids
987 * in inode here, because we can't hold it across the trans_reserve.
988 * If the IDs do change before we take the ilock, we're covered
989 * because the i_*dquot fields will get updated anyway.
990 */
991 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
Christoph Hellwig7d095252009-06-08 15:33:32 +0200992 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000993 ip->i_d.di_gid, fa->fsx_projid,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -0500994 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000995 if (code)
996 return code;
997 }
998
999 /*
1000 * For the other attributes, we acquire the inode lock and
1001 * first do an error checking pass.
1002 */
1003 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
Jie Liu3d3c8b52013-08-12 20:49:59 +10001004 code = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001005 if (code)
1006 goto error_return;
1007
1008 lock_flags = XFS_ILOCK_EXCL;
1009 xfs_ilock(ip, lock_flags);
1010
1011 /*
1012 * CAP_FOWNER overrides the following restrictions:
1013 *
1014 * The user ID of the calling process must be equal
1015 * to the file owner ID, except in cases where the
1016 * CAP_FSETID capability is applicable.
1017 */
Dwight Engenfd5e2aa2013-08-15 14:08:00 -04001018 if (!inode_owner_or_capable(VFS_I(ip))) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001019 code = XFS_ERROR(EPERM);
1020 goto error_return;
1021 }
1022
1023 /*
1024 * Do a quota reservation only if projid is actually going to change.
Dwight Engenfd5e2aa2013-08-15 14:08:00 -04001025 * Only allow changing of projid from init_user_ns since it is a
1026 * non user namespace aware identifier.
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001027 */
1028 if (mask & FSX_PROJID) {
Dwight Engenfd5e2aa2013-08-15 14:08:00 -04001029 if (current_user_ns() != &init_user_ns) {
1030 code = XFS_ERROR(EINVAL);
1031 goto error_return;
1032 }
1033
Christoph Hellwig7d095252009-06-08 15:33:32 +02001034 if (XFS_IS_QUOTA_RUNNING(mp) &&
1035 XFS_IS_PQUOTA_ON(mp) &&
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001036 xfs_get_projid(ip) != fa->fsx_projid) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001037 ASSERT(tp);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001038 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL,
1039 pdqp, capable(CAP_FOWNER) ?
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001040 XFS_QMOPT_FORCE_RES : 0);
1041 if (code) /* out of quota */
1042 goto error_return;
1043 }
1044 }
1045
1046 if (mask & FSX_EXTSIZE) {
1047 /*
1048 * Can't change extent size if any extents are allocated.
1049 */
1050 if (ip->i_d.di_nextents &&
1051 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
1052 fa->fsx_extsize)) {
1053 code = XFS_ERROR(EINVAL); /* EFBIG? */
1054 goto error_return;
1055 }
1056
1057 /*
1058 * Extent size must be a multiple of the appropriate block
Dave Chinner53158372011-01-27 12:18:18 +11001059 * size, if set at all. It must also be smaller than the
1060 * maximum extent size supported by the filesystem.
1061 *
1062 * Also, for non-realtime files, limit the extent size hint to
1063 * half the size of the AGs in the filesystem so alignment
1064 * doesn't result in extents larger than an AG.
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001065 */
1066 if (fa->fsx_extsize != 0) {
Dave Chinner53158372011-01-27 12:18:18 +11001067 xfs_extlen_t size;
1068 xfs_fsblock_t extsize_fsb;
1069
1070 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1071 if (extsize_fsb > MAXEXTLEN) {
1072 code = XFS_ERROR(EINVAL);
1073 goto error_return;
1074 }
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001075
1076 if (XFS_IS_REALTIME_INODE(ip) ||
1077 ((mask & FSX_XFLAGS) &&
1078 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1079 size = mp->m_sb.sb_rextsize <<
1080 mp->m_sb.sb_blocklog;
1081 } else {
1082 size = mp->m_sb.sb_blocksize;
Dave Chinner53158372011-01-27 12:18:18 +11001083 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1084 code = XFS_ERROR(EINVAL);
1085 goto error_return;
1086 }
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001087 }
1088
1089 if (fa->fsx_extsize % size) {
1090 code = XFS_ERROR(EINVAL);
1091 goto error_return;
1092 }
1093 }
1094 }
1095
1096
1097 if (mask & FSX_XFLAGS) {
1098 /*
1099 * Can't change realtime flag if any extents are allocated.
1100 */
1101 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1102 (XFS_IS_REALTIME_INODE(ip)) !=
1103 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1104 code = XFS_ERROR(EINVAL); /* EFBIG? */
1105 goto error_return;
1106 }
1107
1108 /*
1109 * If realtime flag is set then must have realtime data.
1110 */
1111 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1112 if ((mp->m_sb.sb_rblocks == 0) ||
1113 (mp->m_sb.sb_rextsize == 0) ||
1114 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1115 code = XFS_ERROR(EINVAL);
1116 goto error_return;
1117 }
1118 }
1119
1120 /*
1121 * Can't modify an immutable/append-only file unless
1122 * we have appropriate permission.
1123 */
1124 if ((ip->i_d.di_flags &
1125 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1126 (fa->fsx_xflags &
1127 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1128 !capable(CAP_LINUX_IMMUTABLE)) {
1129 code = XFS_ERROR(EPERM);
1130 goto error_return;
1131 }
1132 }
1133
Christoph Hellwigddc34152011-09-19 15:00:54 +00001134 xfs_trans_ijoin(tp, ip, 0);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001135
1136 /*
1137 * Change file ownership. Must be the owner or privileged.
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001138 */
1139 if (mask & FSX_PROJID) {
1140 /*
1141 * CAP_FSETID overrides the following restrictions:
1142 *
1143 * The set-user-ID and set-group-ID bits of a file will be
1144 * cleared upon successful return from chown()
1145 */
1146 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
Dwight Engenfd5e2aa2013-08-15 14:08:00 -04001147 !inode_capable(VFS_I(ip), CAP_FSETID))
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001148 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1149
1150 /*
1151 * Change the ownerships and register quota modifications
1152 * in the transaction.
1153 */
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001154 if (xfs_get_projid(ip) != fa->fsx_projid) {
Christoph Hellwig7d095252009-06-08 15:33:32 +02001155 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1156 olddquot = xfs_qm_vop_chown(tp, ip,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001157 &ip->i_pdquot, pdqp);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001158 }
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001159 xfs_set_projid(ip, fa->fsx_projid);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001160
1161 /*
1162 * We may have to rev the inode as well as
1163 * the superblock version number since projids didn't
1164 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1165 */
Christoph Hellwig51ce16d2008-11-28 14:23:39 +11001166 if (ip->i_d.di_version == 1)
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001167 xfs_bump_ino_vers2(tp, ip);
1168 }
1169
1170 }
1171
1172 if (mask & FSX_EXTSIZE)
1173 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
Christoph Hellwigf13fae22008-07-21 16:16:15 +10001174 if (mask & FSX_XFLAGS) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001175 xfs_set_diflags(ip, fa->fsx_xflags);
Christoph Hellwigf13fae22008-07-21 16:16:15 +10001176 xfs_diflags_to_linux(ip);
1177 }
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001178
Dave Chinnerdcd79a12010-09-28 12:27:25 +10001179 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001180 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001181
1182 XFS_STATS_INC(xs_ig_attrchg);
1183
1184 /*
1185 * If this is a synchronous mount, make sure that the
1186 * transaction goes to disk before returning to the user.
1187 * This is slightly sub-optimal in that truncates require
1188 * two sync transactions instead of one for wsync filesystems.
1189 * One for the truncate and one for the timestamps since we
1190 * don't want to change the timestamps unless we're sure the
1191 * truncate worked. Truncates are less than 1% of the laddis
1192 * mix so this probably isn't worth the trouble to optimize.
1193 */
1194 if (mp->m_flags & XFS_MOUNT_WSYNC)
1195 xfs_trans_set_sync(tp);
1196 code = xfs_trans_commit(tp, 0);
1197 xfs_iunlock(ip, lock_flags);
1198
1199 /*
1200 * Release any dquot(s) the inode had kept before chown.
1201 */
Christoph Hellwig7d095252009-06-08 15:33:32 +02001202 xfs_qm_dqrele(olddquot);
1203 xfs_qm_dqrele(udqp);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001204 xfs_qm_dqrele(pdqp);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001205
Christoph Hellwig288699f2010-06-23 18:11:15 +10001206 return code;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001207
1208 error_return:
Christoph Hellwig7d095252009-06-08 15:33:32 +02001209 xfs_qm_dqrele(udqp);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001210 xfs_qm_dqrele(pdqp);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001211 xfs_trans_cancel(tp, 0);
1212 if (lock_flags)
1213 xfs_iunlock(ip, lock_flags);
1214 return code;
1215}
1216
Christoph Hellwigc83bfab2007-10-11 17:47:00 +10001217STATIC int
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001218xfs_ioc_fssetxattr(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219 xfs_inode_t *ip,
1220 struct file *filp,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221 void __user *arg)
1222{
1223 struct fsxattr fa;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001224 unsigned int mask;
Jan Karad9457dc2012-06-12 16:20:39 +02001225 int error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001226
1227 if (copy_from_user(&fa, arg, sizeof(fa)))
1228 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001230 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001231 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001232 mask |= FSX_NONBLOCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233
Jan Karad9457dc2012-06-12 16:20:39 +02001234 error = mnt_want_write_file(filp);
1235 if (error)
1236 return error;
1237 error = xfs_ioctl_setattr(ip, &fa, mask);
1238 mnt_drop_write_file(filp);
1239 return -error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001240}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001242STATIC int
1243xfs_ioc_getxflags(
1244 xfs_inode_t *ip,
1245 void __user *arg)
1246{
1247 unsigned int flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001249 flags = xfs_di2lxflags(ip->i_d.di_flags);
1250 if (copy_to_user(arg, &flags, sizeof(flags)))
1251 return -EFAULT;
1252 return 0;
1253}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001255STATIC int
1256xfs_ioc_setxflags(
1257 xfs_inode_t *ip,
1258 struct file *filp,
1259 void __user *arg)
1260{
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001261 struct fsxattr fa;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001262 unsigned int flags;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001263 unsigned int mask;
Jan Karad9457dc2012-06-12 16:20:39 +02001264 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001266 if (copy_from_user(&flags, arg, sizeof(flags)))
1267 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001269 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1270 FS_NOATIME_FL | FS_NODUMP_FL | \
1271 FS_SYNC_FL))
1272 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001274 mask = FSX_XFLAGS;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001275 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001276 mask |= FSX_NONBLOCK;
1277 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278
Jan Karad9457dc2012-06-12 16:20:39 +02001279 error = mnt_want_write_file(filp);
1280 if (error)
1281 return error;
1282 error = xfs_ioctl_setattr(ip, &fa, mask);
1283 mnt_drop_write_file(filp);
1284 return -error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285}
1286
1287STATIC int
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001288xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1289{
1290 struct getbmap __user *base = *ap;
1291
1292 /* copy only getbmap portion (not getbmapx) */
1293 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1294 return XFS_ERROR(EFAULT);
1295
1296 *ap += sizeof(struct getbmap);
1297 return 0;
1298}
1299
1300STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301xfs_ioc_getbmap(
Christoph Hellwig993386c2007-08-28 16:12:30 +10001302 struct xfs_inode *ip,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303 int ioflags,
1304 unsigned int cmd,
1305 void __user *arg)
1306{
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001307 struct getbmapx bmx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308 int error;
1309
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001310 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311 return -XFS_ERROR(EFAULT);
1312
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001313 if (bmx.bmv_count < 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314 return -XFS_ERROR(EINVAL);
1315
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001316 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317 if (ioflags & IO_INVIS)
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001318 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001319
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001320 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1321 (struct getbmap *)arg+1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322 if (error)
1323 return -error;
1324
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001325 /* copy back header - only size of getbmap */
1326 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327 return -XFS_ERROR(EFAULT);
1328 return 0;
1329}
1330
1331STATIC int
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001332xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1333{
1334 struct getbmapx __user *base = *ap;
1335
1336 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1337 return XFS_ERROR(EFAULT);
1338
1339 *ap += sizeof(struct getbmapx);
1340 return 0;
1341}
1342
1343STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344xfs_ioc_getbmapx(
Christoph Hellwig993386c2007-08-28 16:12:30 +10001345 struct xfs_inode *ip,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346 void __user *arg)
1347{
1348 struct getbmapx bmx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349 int error;
1350
1351 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1352 return -XFS_ERROR(EFAULT);
1353
1354 if (bmx.bmv_count < 2)
1355 return -XFS_ERROR(EINVAL);
1356
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001357 if (bmx.bmv_iflags & (~BMV_IF_VALID))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358 return -XFS_ERROR(EINVAL);
1359
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001360 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1361 (struct getbmapx *)arg+1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362 if (error)
1363 return -error;
1364
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001365 /* copy back header */
1366 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367 return -XFS_ERROR(EFAULT);
1368
1369 return 0;
1370}
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001371
Dave Chinnera133d952013-08-12 20:49:48 +10001372int
1373xfs_ioc_swapext(
1374 xfs_swapext_t *sxp)
1375{
1376 xfs_inode_t *ip, *tip;
1377 struct fd f, tmp;
1378 int error = 0;
1379
1380 /* Pull information for the target fd */
1381 f = fdget((int)sxp->sx_fdtarget);
1382 if (!f.file) {
1383 error = XFS_ERROR(EINVAL);
1384 goto out;
1385 }
1386
1387 if (!(f.file->f_mode & FMODE_WRITE) ||
1388 !(f.file->f_mode & FMODE_READ) ||
1389 (f.file->f_flags & O_APPEND)) {
1390 error = XFS_ERROR(EBADF);
1391 goto out_put_file;
1392 }
1393
1394 tmp = fdget((int)sxp->sx_fdtmp);
1395 if (!tmp.file) {
1396 error = XFS_ERROR(EINVAL);
1397 goto out_put_file;
1398 }
1399
1400 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1401 !(tmp.file->f_mode & FMODE_READ) ||
1402 (tmp.file->f_flags & O_APPEND)) {
1403 error = XFS_ERROR(EBADF);
1404 goto out_put_tmp_file;
1405 }
1406
1407 if (IS_SWAPFILE(file_inode(f.file)) ||
1408 IS_SWAPFILE(file_inode(tmp.file))) {
1409 error = XFS_ERROR(EINVAL);
1410 goto out_put_tmp_file;
1411 }
1412
1413 ip = XFS_I(file_inode(f.file));
1414 tip = XFS_I(file_inode(tmp.file));
1415
1416 if (ip->i_mount != tip->i_mount) {
1417 error = XFS_ERROR(EINVAL);
1418 goto out_put_tmp_file;
1419 }
1420
1421 if (ip->i_ino == tip->i_ino) {
1422 error = XFS_ERROR(EINVAL);
1423 goto out_put_tmp_file;
1424 }
1425
1426 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1427 error = XFS_ERROR(EIO);
1428 goto out_put_tmp_file;
1429 }
1430
1431 error = xfs_swap_extents(ip, tip, sxp);
1432
1433 out_put_tmp_file:
1434 fdput(tmp);
1435 out_put_file:
1436 fdput(f);
1437 out:
1438 return error;
1439}
1440
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001441/*
1442 * Note: some of the ioctl's return positive numbers as a
1443 * byte count indicating success, such as readlink_by_handle.
1444 * So we don't "sign flip" like most other routines. This means
1445 * true errors need to be returned as a negative value.
1446 */
1447long
1448xfs_file_ioctl(
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001449 struct file *filp,
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001450 unsigned int cmd,
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001451 unsigned long p)
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001452{
Al Viro496ad9a2013-01-23 17:07:38 -05001453 struct inode *inode = file_inode(filp);
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001454 struct xfs_inode *ip = XFS_I(inode);
1455 struct xfs_mount *mp = ip->i_mount;
1456 void __user *arg = (void __user *)p;
1457 int ioflags = 0;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001458 int error;
1459
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001460 if (filp->f_mode & FMODE_NOCMTIME)
1461 ioflags |= IO_INVIS;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001462
Christoph Hellwigcca28fb2010-06-24 11:57:09 +10001463 trace_xfs_file_ioctl(ip);
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001464
1465 switch (cmd) {
Christoph Hellwiga46db602011-01-07 13:02:04 +00001466 case FITRIM:
1467 return xfs_ioc_trim(mp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001468 case XFS_IOC_ALLOCSP:
1469 case XFS_IOC_FREESP:
1470 case XFS_IOC_RESVSP:
1471 case XFS_IOC_UNRESVSP:
1472 case XFS_IOC_ALLOCSP64:
1473 case XFS_IOC_FREESP64:
1474 case XFS_IOC_RESVSP64:
Dave Chinner44722352010-08-24 12:02:11 +10001475 case XFS_IOC_UNRESVSP64:
1476 case XFS_IOC_ZERO_RANGE: {
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001477 xfs_flock64_t bf;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001478
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001479 if (copy_from_user(&bf, arg, sizeof(bf)))
1480 return -XFS_ERROR(EFAULT);
1481 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1482 }
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001483 case XFS_IOC_DIOINFO: {
1484 struct dioattr da;
1485 xfs_buftarg_t *target =
1486 XFS_IS_REALTIME_INODE(ip) ?
1487 mp->m_rtdev_targp : mp->m_ddev_targp;
1488
1489 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1490 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1491
1492 if (copy_to_user(arg, &da, sizeof(da)))
1493 return -XFS_ERROR(EFAULT);
1494 return 0;
1495 }
1496
1497 case XFS_IOC_FSBULKSTAT_SINGLE:
1498 case XFS_IOC_FSBULKSTAT:
1499 case XFS_IOC_FSINUMBERS:
1500 return xfs_ioc_bulkstat(mp, cmd, arg);
1501
1502 case XFS_IOC_FSGEOMETRY_V1:
1503 return xfs_ioc_fsgeometry_v1(mp, arg);
1504
1505 case XFS_IOC_FSGEOMETRY:
1506 return xfs_ioc_fsgeometry(mp, arg);
1507
1508 case XFS_IOC_GETVERSION:
1509 return put_user(inode->i_generation, (int __user *)arg);
1510
1511 case XFS_IOC_FSGETXATTR:
1512 return xfs_ioc_fsgetxattr(ip, 0, arg);
1513 case XFS_IOC_FSGETXATTRA:
1514 return xfs_ioc_fsgetxattr(ip, 1, arg);
Lachlan McIlroy3b2816b2008-04-18 12:43:35 +10001515 case XFS_IOC_FSSETXATTR:
Lachlan McIlroy65e67f52008-04-18 12:59:45 +10001516 return xfs_ioc_fssetxattr(ip, filp, arg);
1517 case XFS_IOC_GETXFLAGS:
1518 return xfs_ioc_getxflags(ip, arg);
1519 case XFS_IOC_SETXFLAGS:
1520 return xfs_ioc_setxflags(ip, filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001521
1522 case XFS_IOC_FSSETDM: {
1523 struct fsdmidata dmi;
1524
1525 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1526 return -XFS_ERROR(EFAULT);
1527
Jan Karad9457dc2012-06-12 16:20:39 +02001528 error = mnt_want_write_file(filp);
1529 if (error)
1530 return error;
1531
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001532 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1533 dmi.fsd_dmstate);
Jan Karad9457dc2012-06-12 16:20:39 +02001534 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001535 return -error;
1536 }
1537
1538 case XFS_IOC_GETBMAP:
1539 case XFS_IOC_GETBMAPA:
1540 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1541
1542 case XFS_IOC_GETBMAPX:
1543 return xfs_ioc_getbmapx(ip, arg);
1544
1545 case XFS_IOC_FD_TO_HANDLE:
1546 case XFS_IOC_PATH_TO_HANDLE:
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001547 case XFS_IOC_PATH_TO_FSHANDLE: {
1548 xfs_fsop_handlereq_t hreq;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001549
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001550 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1551 return -XFS_ERROR(EFAULT);
1552 return xfs_find_handle(cmd, &hreq);
1553 }
1554 case XFS_IOC_OPEN_BY_HANDLE: {
1555 xfs_fsop_handlereq_t hreq;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001556
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001557 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1558 return -XFS_ERROR(EFAULT);
Christoph Hellwigd296d302009-01-19 02:02:57 +01001559 return xfs_open_by_handle(filp, &hreq);
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001560 }
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001561 case XFS_IOC_FSSETDM_BY_HANDLE:
Christoph Hellwigd296d302009-01-19 02:02:57 +01001562 return xfs_fssetdm_by_handle(filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001563
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001564 case XFS_IOC_READLINK_BY_HANDLE: {
1565 xfs_fsop_handlereq_t hreq;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001566
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001567 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1568 return -XFS_ERROR(EFAULT);
Christoph Hellwigd296d302009-01-19 02:02:57 +01001569 return xfs_readlink_by_handle(filp, &hreq);
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001570 }
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001571 case XFS_IOC_ATTRLIST_BY_HANDLE:
Christoph Hellwigd296d302009-01-19 02:02:57 +01001572 return xfs_attrlist_by_handle(filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001573
1574 case XFS_IOC_ATTRMULTI_BY_HANDLE:
Christoph Hellwigd296d302009-01-19 02:02:57 +01001575 return xfs_attrmulti_by_handle(filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001576
1577 case XFS_IOC_SWAPEXT: {
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001578 struct xfs_swapext sxp;
1579
1580 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1581 return -XFS_ERROR(EFAULT);
Jan Karad9457dc2012-06-12 16:20:39 +02001582 error = mnt_want_write_file(filp);
1583 if (error)
1584 return error;
Dave Chinnera133d952013-08-12 20:49:48 +10001585 error = xfs_ioc_swapext(&sxp);
Jan Karad9457dc2012-06-12 16:20:39 +02001586 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001587 return -error;
1588 }
1589
1590 case XFS_IOC_FSCOUNTS: {
1591 xfs_fsop_counts_t out;
1592
1593 error = xfs_fs_counts(mp, &out);
1594 if (error)
1595 return -error;
1596
1597 if (copy_to_user(arg, &out, sizeof(out)))
1598 return -XFS_ERROR(EFAULT);
1599 return 0;
1600 }
1601
1602 case XFS_IOC_SET_RESBLKS: {
1603 xfs_fsop_resblks_t inout;
1604 __uint64_t in;
1605
1606 if (!capable(CAP_SYS_ADMIN))
1607 return -EPERM;
1608
Eric Sandeend5db0f92010-02-05 22:59:53 +00001609 if (mp->m_flags & XFS_MOUNT_RDONLY)
1610 return -XFS_ERROR(EROFS);
1611
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001612 if (copy_from_user(&inout, arg, sizeof(inout)))
1613 return -XFS_ERROR(EFAULT);
1614
Jan Karad9457dc2012-06-12 16:20:39 +02001615 error = mnt_want_write_file(filp);
1616 if (error)
1617 return error;
1618
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001619 /* input parameter is passed in resblks field of structure */
1620 in = inout.resblks;
1621 error = xfs_reserve_blocks(mp, &in, &inout);
Jan Karad9457dc2012-06-12 16:20:39 +02001622 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001623 if (error)
1624 return -error;
1625
1626 if (copy_to_user(arg, &inout, sizeof(inout)))
1627 return -XFS_ERROR(EFAULT);
1628 return 0;
1629 }
1630
1631 case XFS_IOC_GET_RESBLKS: {
1632 xfs_fsop_resblks_t out;
1633
1634 if (!capable(CAP_SYS_ADMIN))
1635 return -EPERM;
1636
1637 error = xfs_reserve_blocks(mp, NULL, &out);
1638 if (error)
1639 return -error;
1640
1641 if (copy_to_user(arg, &out, sizeof(out)))
1642 return -XFS_ERROR(EFAULT);
1643
1644 return 0;
1645 }
1646
1647 case XFS_IOC_FSGROWFSDATA: {
1648 xfs_growfs_data_t in;
1649
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001650 if (copy_from_user(&in, arg, sizeof(in)))
1651 return -XFS_ERROR(EFAULT);
1652
Jan Karad9457dc2012-06-12 16:20:39 +02001653 error = mnt_want_write_file(filp);
1654 if (error)
1655 return error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001656 error = xfs_growfs_data(mp, &in);
Jan Karad9457dc2012-06-12 16:20:39 +02001657 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001658 return -error;
1659 }
1660
1661 case XFS_IOC_FSGROWFSLOG: {
1662 xfs_growfs_log_t in;
1663
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001664 if (copy_from_user(&in, arg, sizeof(in)))
1665 return -XFS_ERROR(EFAULT);
1666
Jan Karad9457dc2012-06-12 16:20:39 +02001667 error = mnt_want_write_file(filp);
1668 if (error)
1669 return error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001670 error = xfs_growfs_log(mp, &in);
Jan Karad9457dc2012-06-12 16:20:39 +02001671 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001672 return -error;
1673 }
1674
1675 case XFS_IOC_FSGROWFSRT: {
1676 xfs_growfs_rt_t in;
1677
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001678 if (copy_from_user(&in, arg, sizeof(in)))
1679 return -XFS_ERROR(EFAULT);
1680
Jan Karad9457dc2012-06-12 16:20:39 +02001681 error = mnt_want_write_file(filp);
1682 if (error)
1683 return error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001684 error = xfs_growfs_rt(mp, &in);
Jan Karad9457dc2012-06-12 16:20:39 +02001685 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001686 return -error;
1687 }
1688
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001689 case XFS_IOC_GOINGDOWN: {
1690 __uint32_t in;
1691
1692 if (!capable(CAP_SYS_ADMIN))
1693 return -EPERM;
1694
1695 if (get_user(in, (__uint32_t __user *)arg))
1696 return -XFS_ERROR(EFAULT);
1697
1698 error = xfs_fs_goingdown(mp, in);
1699 return -error;
1700 }
1701
1702 case XFS_IOC_ERROR_INJECTION: {
1703 xfs_error_injection_t in;
1704
1705 if (!capable(CAP_SYS_ADMIN))
1706 return -EPERM;
1707
1708 if (copy_from_user(&in, arg, sizeof(in)))
1709 return -XFS_ERROR(EFAULT);
1710
1711 error = xfs_errortag_add(in.errtag, mp);
1712 return -error;
1713 }
1714
1715 case XFS_IOC_ERROR_CLEARALL:
1716 if (!capable(CAP_SYS_ADMIN))
1717 return -EPERM;
1718
1719 error = xfs_errortag_clearall(mp, 1);
1720 return -error;
1721
Brian Foster8ca149d2012-11-07 12:21:12 -05001722 case XFS_IOC_FREE_EOFBLOCKS: {
Dwight Engenb9fe5052013-08-15 14:08:02 -04001723 struct xfs_fs_eofblocks eofb;
1724 struct xfs_eofblocks keofb;
Brian Foster8ca149d2012-11-07 12:21:12 -05001725
Dwight Engen8c567a72013-08-15 14:08:03 -04001726 if (!capable(CAP_SYS_ADMIN))
1727 return -EPERM;
1728
1729 if (mp->m_flags & XFS_MOUNT_RDONLY)
1730 return -XFS_ERROR(EROFS);
1731
Brian Foster8ca149d2012-11-07 12:21:12 -05001732 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1733 return -XFS_ERROR(EFAULT);
1734
Dwight Engenb9fe5052013-08-15 14:08:02 -04001735 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1736 if (error)
1737 return -error;
Brian Foster8ca149d2012-11-07 12:21:12 -05001738
Dwight Engenb9fe5052013-08-15 14:08:02 -04001739 return -xfs_icache_free_eofblocks(mp, &keofb);
Brian Foster8ca149d2012-11-07 12:21:12 -05001740 }
1741
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001742 default:
1743 return -ENOTTY;
1744 }
1745}