blob: e9c17e2ed6d7bbaf2e321ad1675237ab77b85f33 [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 Chinner531c3bd2012-10-25 17:22:30 +110074 struct fd f = {0};
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 */
David Howells91b7771252008-10-31 15:50:04 +11001018 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
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.
1025 */
1026 if (mask & FSX_PROJID) {
Christoph Hellwig7d095252009-06-08 15:33:32 +02001027 if (XFS_IS_QUOTA_RUNNING(mp) &&
1028 XFS_IS_PQUOTA_ON(mp) &&
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001029 xfs_get_projid(ip) != fa->fsx_projid) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001030 ASSERT(tp);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001031 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL,
1032 pdqp, capable(CAP_FOWNER) ?
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001033 XFS_QMOPT_FORCE_RES : 0);
1034 if (code) /* out of quota */
1035 goto error_return;
1036 }
1037 }
1038
1039 if (mask & FSX_EXTSIZE) {
1040 /*
1041 * Can't change extent size if any extents are allocated.
1042 */
1043 if (ip->i_d.di_nextents &&
1044 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
1045 fa->fsx_extsize)) {
1046 code = XFS_ERROR(EINVAL); /* EFBIG? */
1047 goto error_return;
1048 }
1049
1050 /*
1051 * Extent size must be a multiple of the appropriate block
Dave Chinner53158372011-01-27 12:18:18 +11001052 * size, if set at all. It must also be smaller than the
1053 * maximum extent size supported by the filesystem.
1054 *
1055 * Also, for non-realtime files, limit the extent size hint to
1056 * half the size of the AGs in the filesystem so alignment
1057 * doesn't result in extents larger than an AG.
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001058 */
1059 if (fa->fsx_extsize != 0) {
Dave Chinner53158372011-01-27 12:18:18 +11001060 xfs_extlen_t size;
1061 xfs_fsblock_t extsize_fsb;
1062
1063 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1064 if (extsize_fsb > MAXEXTLEN) {
1065 code = XFS_ERROR(EINVAL);
1066 goto error_return;
1067 }
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001068
1069 if (XFS_IS_REALTIME_INODE(ip) ||
1070 ((mask & FSX_XFLAGS) &&
1071 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1072 size = mp->m_sb.sb_rextsize <<
1073 mp->m_sb.sb_blocklog;
1074 } else {
1075 size = mp->m_sb.sb_blocksize;
Dave Chinner53158372011-01-27 12:18:18 +11001076 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1077 code = XFS_ERROR(EINVAL);
1078 goto error_return;
1079 }
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001080 }
1081
1082 if (fa->fsx_extsize % size) {
1083 code = XFS_ERROR(EINVAL);
1084 goto error_return;
1085 }
1086 }
1087 }
1088
1089
1090 if (mask & FSX_XFLAGS) {
1091 /*
1092 * Can't change realtime flag if any extents are allocated.
1093 */
1094 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1095 (XFS_IS_REALTIME_INODE(ip)) !=
1096 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1097 code = XFS_ERROR(EINVAL); /* EFBIG? */
1098 goto error_return;
1099 }
1100
1101 /*
1102 * If realtime flag is set then must have realtime data.
1103 */
1104 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1105 if ((mp->m_sb.sb_rblocks == 0) ||
1106 (mp->m_sb.sb_rextsize == 0) ||
1107 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1108 code = XFS_ERROR(EINVAL);
1109 goto error_return;
1110 }
1111 }
1112
1113 /*
1114 * Can't modify an immutable/append-only file unless
1115 * we have appropriate permission.
1116 */
1117 if ((ip->i_d.di_flags &
1118 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1119 (fa->fsx_xflags &
1120 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1121 !capable(CAP_LINUX_IMMUTABLE)) {
1122 code = XFS_ERROR(EPERM);
1123 goto error_return;
1124 }
1125 }
1126
Christoph Hellwigddc34152011-09-19 15:00:54 +00001127 xfs_trans_ijoin(tp, ip, 0);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001128
1129 /*
1130 * Change file ownership. Must be the owner or privileged.
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001131 */
1132 if (mask & FSX_PROJID) {
1133 /*
1134 * CAP_FSETID overrides the following restrictions:
1135 *
1136 * The set-user-ID and set-group-ID bits of a file will be
1137 * cleared upon successful return from chown()
1138 */
1139 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1140 !capable(CAP_FSETID))
1141 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1142
1143 /*
1144 * Change the ownerships and register quota modifications
1145 * in the transaction.
1146 */
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001147 if (xfs_get_projid(ip) != fa->fsx_projid) {
Christoph Hellwig7d095252009-06-08 15:33:32 +02001148 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1149 olddquot = xfs_qm_vop_chown(tp, ip,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001150 &ip->i_pdquot, pdqp);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001151 }
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001152 xfs_set_projid(ip, fa->fsx_projid);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001153
1154 /*
1155 * We may have to rev the inode as well as
1156 * the superblock version number since projids didn't
1157 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1158 */
Christoph Hellwig51ce16d2008-11-28 14:23:39 +11001159 if (ip->i_d.di_version == 1)
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001160 xfs_bump_ino_vers2(tp, ip);
1161 }
1162
1163 }
1164
1165 if (mask & FSX_EXTSIZE)
1166 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
Christoph Hellwigf13fae22008-07-21 16:16:15 +10001167 if (mask & FSX_XFLAGS) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001168 xfs_set_diflags(ip, fa->fsx_xflags);
Christoph Hellwigf13fae22008-07-21 16:16:15 +10001169 xfs_diflags_to_linux(ip);
1170 }
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001171
Dave Chinnerdcd79a12010-09-28 12:27:25 +10001172 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001173 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001174
1175 XFS_STATS_INC(xs_ig_attrchg);
1176
1177 /*
1178 * If this is a synchronous mount, make sure that the
1179 * transaction goes to disk before returning to the user.
1180 * This is slightly sub-optimal in that truncates require
1181 * two sync transactions instead of one for wsync filesystems.
1182 * One for the truncate and one for the timestamps since we
1183 * don't want to change the timestamps unless we're sure the
1184 * truncate worked. Truncates are less than 1% of the laddis
1185 * mix so this probably isn't worth the trouble to optimize.
1186 */
1187 if (mp->m_flags & XFS_MOUNT_WSYNC)
1188 xfs_trans_set_sync(tp);
1189 code = xfs_trans_commit(tp, 0);
1190 xfs_iunlock(ip, lock_flags);
1191
1192 /*
1193 * Release any dquot(s) the inode had kept before chown.
1194 */
Christoph Hellwig7d095252009-06-08 15:33:32 +02001195 xfs_qm_dqrele(olddquot);
1196 xfs_qm_dqrele(udqp);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001197 xfs_qm_dqrele(pdqp);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001198
Christoph Hellwig288699f2010-06-23 18:11:15 +10001199 return code;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001200
1201 error_return:
Christoph Hellwig7d095252009-06-08 15:33:32 +02001202 xfs_qm_dqrele(udqp);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001203 xfs_qm_dqrele(pdqp);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001204 xfs_trans_cancel(tp, 0);
1205 if (lock_flags)
1206 xfs_iunlock(ip, lock_flags);
1207 return code;
1208}
1209
Christoph Hellwigc83bfab2007-10-11 17:47:00 +10001210STATIC int
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001211xfs_ioc_fssetxattr(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212 xfs_inode_t *ip,
1213 struct file *filp,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 void __user *arg)
1215{
1216 struct fsxattr fa;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001217 unsigned int mask;
Jan Karad9457dc2012-06-12 16:20:39 +02001218 int error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001219
1220 if (copy_from_user(&fa, arg, sizeof(fa)))
1221 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001223 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001224 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001225 mask |= FSX_NONBLOCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226
Jan Karad9457dc2012-06-12 16:20:39 +02001227 error = mnt_want_write_file(filp);
1228 if (error)
1229 return error;
1230 error = xfs_ioctl_setattr(ip, &fa, mask);
1231 mnt_drop_write_file(filp);
1232 return -error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001233}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001235STATIC int
1236xfs_ioc_getxflags(
1237 xfs_inode_t *ip,
1238 void __user *arg)
1239{
1240 unsigned int flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001242 flags = xfs_di2lxflags(ip->i_d.di_flags);
1243 if (copy_to_user(arg, &flags, sizeof(flags)))
1244 return -EFAULT;
1245 return 0;
1246}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001248STATIC int
1249xfs_ioc_setxflags(
1250 xfs_inode_t *ip,
1251 struct file *filp,
1252 void __user *arg)
1253{
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001254 struct fsxattr fa;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001255 unsigned int flags;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001256 unsigned int mask;
Jan Karad9457dc2012-06-12 16:20:39 +02001257 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001259 if (copy_from_user(&flags, arg, sizeof(flags)))
1260 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001262 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1263 FS_NOATIME_FL | FS_NODUMP_FL | \
1264 FS_SYNC_FL))
1265 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001267 mask = FSX_XFLAGS;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001268 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001269 mask |= FSX_NONBLOCK;
1270 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271
Jan Karad9457dc2012-06-12 16:20:39 +02001272 error = mnt_want_write_file(filp);
1273 if (error)
1274 return error;
1275 error = xfs_ioctl_setattr(ip, &fa, mask);
1276 mnt_drop_write_file(filp);
1277 return -error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278}
1279
1280STATIC int
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001281xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1282{
1283 struct getbmap __user *base = *ap;
1284
1285 /* copy only getbmap portion (not getbmapx) */
1286 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1287 return XFS_ERROR(EFAULT);
1288
1289 *ap += sizeof(struct getbmap);
1290 return 0;
1291}
1292
1293STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294xfs_ioc_getbmap(
Christoph Hellwig993386c2007-08-28 16:12:30 +10001295 struct xfs_inode *ip,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296 int ioflags,
1297 unsigned int cmd,
1298 void __user *arg)
1299{
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001300 struct getbmapx bmx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301 int error;
1302
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001303 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304 return -XFS_ERROR(EFAULT);
1305
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001306 if (bmx.bmv_count < 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307 return -XFS_ERROR(EINVAL);
1308
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001309 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310 if (ioflags & IO_INVIS)
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001311 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001313 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1314 (struct getbmap *)arg+1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315 if (error)
1316 return -error;
1317
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001318 /* copy back header - only size of getbmap */
1319 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320 return -XFS_ERROR(EFAULT);
1321 return 0;
1322}
1323
1324STATIC int
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001325xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1326{
1327 struct getbmapx __user *base = *ap;
1328
1329 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1330 return XFS_ERROR(EFAULT);
1331
1332 *ap += sizeof(struct getbmapx);
1333 return 0;
1334}
1335
1336STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337xfs_ioc_getbmapx(
Christoph Hellwig993386c2007-08-28 16:12:30 +10001338 struct xfs_inode *ip,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339 void __user *arg)
1340{
1341 struct getbmapx bmx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342 int error;
1343
1344 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1345 return -XFS_ERROR(EFAULT);
1346
1347 if (bmx.bmv_count < 2)
1348 return -XFS_ERROR(EINVAL);
1349
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001350 if (bmx.bmv_iflags & (~BMV_IF_VALID))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351 return -XFS_ERROR(EINVAL);
1352
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001353 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1354 (struct getbmapx *)arg+1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355 if (error)
1356 return -error;
1357
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001358 /* copy back header */
1359 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360 return -XFS_ERROR(EFAULT);
1361
1362 return 0;
1363}
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001364
Dave Chinnera133d952013-08-12 20:49:48 +10001365int
1366xfs_ioc_swapext(
1367 xfs_swapext_t *sxp)
1368{
1369 xfs_inode_t *ip, *tip;
1370 struct fd f, tmp;
1371 int error = 0;
1372
1373 /* Pull information for the target fd */
1374 f = fdget((int)sxp->sx_fdtarget);
1375 if (!f.file) {
1376 error = XFS_ERROR(EINVAL);
1377 goto out;
1378 }
1379
1380 if (!(f.file->f_mode & FMODE_WRITE) ||
1381 !(f.file->f_mode & FMODE_READ) ||
1382 (f.file->f_flags & O_APPEND)) {
1383 error = XFS_ERROR(EBADF);
1384 goto out_put_file;
1385 }
1386
1387 tmp = fdget((int)sxp->sx_fdtmp);
1388 if (!tmp.file) {
1389 error = XFS_ERROR(EINVAL);
1390 goto out_put_file;
1391 }
1392
1393 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1394 !(tmp.file->f_mode & FMODE_READ) ||
1395 (tmp.file->f_flags & O_APPEND)) {
1396 error = XFS_ERROR(EBADF);
1397 goto out_put_tmp_file;
1398 }
1399
1400 if (IS_SWAPFILE(file_inode(f.file)) ||
1401 IS_SWAPFILE(file_inode(tmp.file))) {
1402 error = XFS_ERROR(EINVAL);
1403 goto out_put_tmp_file;
1404 }
1405
1406 ip = XFS_I(file_inode(f.file));
1407 tip = XFS_I(file_inode(tmp.file));
1408
1409 if (ip->i_mount != tip->i_mount) {
1410 error = XFS_ERROR(EINVAL);
1411 goto out_put_tmp_file;
1412 }
1413
1414 if (ip->i_ino == tip->i_ino) {
1415 error = XFS_ERROR(EINVAL);
1416 goto out_put_tmp_file;
1417 }
1418
1419 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1420 error = XFS_ERROR(EIO);
1421 goto out_put_tmp_file;
1422 }
1423
1424 error = xfs_swap_extents(ip, tip, sxp);
1425
1426 out_put_tmp_file:
1427 fdput(tmp);
1428 out_put_file:
1429 fdput(f);
1430 out:
1431 return error;
1432}
1433
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001434/*
1435 * Note: some of the ioctl's return positive numbers as a
1436 * byte count indicating success, such as readlink_by_handle.
1437 * So we don't "sign flip" like most other routines. This means
1438 * true errors need to be returned as a negative value.
1439 */
1440long
1441xfs_file_ioctl(
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001442 struct file *filp,
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001443 unsigned int cmd,
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001444 unsigned long p)
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001445{
Al Viro496ad9a2013-01-23 17:07:38 -05001446 struct inode *inode = file_inode(filp);
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001447 struct xfs_inode *ip = XFS_I(inode);
1448 struct xfs_mount *mp = ip->i_mount;
1449 void __user *arg = (void __user *)p;
1450 int ioflags = 0;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001451 int error;
1452
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001453 if (filp->f_mode & FMODE_NOCMTIME)
1454 ioflags |= IO_INVIS;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001455
Christoph Hellwigcca28fb2010-06-24 11:57:09 +10001456 trace_xfs_file_ioctl(ip);
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001457
1458 switch (cmd) {
Christoph Hellwiga46db602011-01-07 13:02:04 +00001459 case FITRIM:
1460 return xfs_ioc_trim(mp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001461 case XFS_IOC_ALLOCSP:
1462 case XFS_IOC_FREESP:
1463 case XFS_IOC_RESVSP:
1464 case XFS_IOC_UNRESVSP:
1465 case XFS_IOC_ALLOCSP64:
1466 case XFS_IOC_FREESP64:
1467 case XFS_IOC_RESVSP64:
Dave Chinner44722352010-08-24 12:02:11 +10001468 case XFS_IOC_UNRESVSP64:
1469 case XFS_IOC_ZERO_RANGE: {
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001470 xfs_flock64_t bf;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001471
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001472 if (copy_from_user(&bf, arg, sizeof(bf)))
1473 return -XFS_ERROR(EFAULT);
1474 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1475 }
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001476 case XFS_IOC_DIOINFO: {
1477 struct dioattr da;
1478 xfs_buftarg_t *target =
1479 XFS_IS_REALTIME_INODE(ip) ?
1480 mp->m_rtdev_targp : mp->m_ddev_targp;
1481
1482 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1483 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1484
1485 if (copy_to_user(arg, &da, sizeof(da)))
1486 return -XFS_ERROR(EFAULT);
1487 return 0;
1488 }
1489
1490 case XFS_IOC_FSBULKSTAT_SINGLE:
1491 case XFS_IOC_FSBULKSTAT:
1492 case XFS_IOC_FSINUMBERS:
1493 return xfs_ioc_bulkstat(mp, cmd, arg);
1494
1495 case XFS_IOC_FSGEOMETRY_V1:
1496 return xfs_ioc_fsgeometry_v1(mp, arg);
1497
1498 case XFS_IOC_FSGEOMETRY:
1499 return xfs_ioc_fsgeometry(mp, arg);
1500
1501 case XFS_IOC_GETVERSION:
1502 return put_user(inode->i_generation, (int __user *)arg);
1503
1504 case XFS_IOC_FSGETXATTR:
1505 return xfs_ioc_fsgetxattr(ip, 0, arg);
1506 case XFS_IOC_FSGETXATTRA:
1507 return xfs_ioc_fsgetxattr(ip, 1, arg);
Lachlan McIlroy3b2816b2008-04-18 12:43:35 +10001508 case XFS_IOC_FSSETXATTR:
Lachlan McIlroy65e67f52008-04-18 12:59:45 +10001509 return xfs_ioc_fssetxattr(ip, filp, arg);
1510 case XFS_IOC_GETXFLAGS:
1511 return xfs_ioc_getxflags(ip, arg);
1512 case XFS_IOC_SETXFLAGS:
1513 return xfs_ioc_setxflags(ip, filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001514
1515 case XFS_IOC_FSSETDM: {
1516 struct fsdmidata dmi;
1517
1518 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1519 return -XFS_ERROR(EFAULT);
1520
Jan Karad9457dc2012-06-12 16:20:39 +02001521 error = mnt_want_write_file(filp);
1522 if (error)
1523 return error;
1524
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001525 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1526 dmi.fsd_dmstate);
Jan Karad9457dc2012-06-12 16:20:39 +02001527 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001528 return -error;
1529 }
1530
1531 case XFS_IOC_GETBMAP:
1532 case XFS_IOC_GETBMAPA:
1533 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1534
1535 case XFS_IOC_GETBMAPX:
1536 return xfs_ioc_getbmapx(ip, arg);
1537
1538 case XFS_IOC_FD_TO_HANDLE:
1539 case XFS_IOC_PATH_TO_HANDLE:
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001540 case XFS_IOC_PATH_TO_FSHANDLE: {
1541 xfs_fsop_handlereq_t hreq;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001542
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001543 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1544 return -XFS_ERROR(EFAULT);
1545 return xfs_find_handle(cmd, &hreq);
1546 }
1547 case XFS_IOC_OPEN_BY_HANDLE: {
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(xfs_fsop_handlereq_t)))
1551 return -XFS_ERROR(EFAULT);
Christoph Hellwigd296d302009-01-19 02:02:57 +01001552 return xfs_open_by_handle(filp, &hreq);
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001553 }
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001554 case XFS_IOC_FSSETDM_BY_HANDLE:
Christoph Hellwigd296d302009-01-19 02:02:57 +01001555 return xfs_fssetdm_by_handle(filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001556
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001557 case XFS_IOC_READLINK_BY_HANDLE: {
1558 xfs_fsop_handlereq_t hreq;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001559
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001560 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1561 return -XFS_ERROR(EFAULT);
Christoph Hellwigd296d302009-01-19 02:02:57 +01001562 return xfs_readlink_by_handle(filp, &hreq);
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001563 }
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001564 case XFS_IOC_ATTRLIST_BY_HANDLE:
Christoph Hellwigd296d302009-01-19 02:02:57 +01001565 return xfs_attrlist_by_handle(filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001566
1567 case XFS_IOC_ATTRMULTI_BY_HANDLE:
Christoph Hellwigd296d302009-01-19 02:02:57 +01001568 return xfs_attrmulti_by_handle(filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001569
1570 case XFS_IOC_SWAPEXT: {
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001571 struct xfs_swapext sxp;
1572
1573 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1574 return -XFS_ERROR(EFAULT);
Jan Karad9457dc2012-06-12 16:20:39 +02001575 error = mnt_want_write_file(filp);
1576 if (error)
1577 return error;
Dave Chinnera133d952013-08-12 20:49:48 +10001578 error = xfs_ioc_swapext(&sxp);
Jan Karad9457dc2012-06-12 16:20:39 +02001579 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001580 return -error;
1581 }
1582
1583 case XFS_IOC_FSCOUNTS: {
1584 xfs_fsop_counts_t out;
1585
1586 error = xfs_fs_counts(mp, &out);
1587 if (error)
1588 return -error;
1589
1590 if (copy_to_user(arg, &out, sizeof(out)))
1591 return -XFS_ERROR(EFAULT);
1592 return 0;
1593 }
1594
1595 case XFS_IOC_SET_RESBLKS: {
1596 xfs_fsop_resblks_t inout;
1597 __uint64_t in;
1598
1599 if (!capable(CAP_SYS_ADMIN))
1600 return -EPERM;
1601
Eric Sandeend5db0f92010-02-05 22:59:53 +00001602 if (mp->m_flags & XFS_MOUNT_RDONLY)
1603 return -XFS_ERROR(EROFS);
1604
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001605 if (copy_from_user(&inout, arg, sizeof(inout)))
1606 return -XFS_ERROR(EFAULT);
1607
Jan Karad9457dc2012-06-12 16:20:39 +02001608 error = mnt_want_write_file(filp);
1609 if (error)
1610 return error;
1611
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001612 /* input parameter is passed in resblks field of structure */
1613 in = inout.resblks;
1614 error = xfs_reserve_blocks(mp, &in, &inout);
Jan Karad9457dc2012-06-12 16:20:39 +02001615 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001616 if (error)
1617 return -error;
1618
1619 if (copy_to_user(arg, &inout, sizeof(inout)))
1620 return -XFS_ERROR(EFAULT);
1621 return 0;
1622 }
1623
1624 case XFS_IOC_GET_RESBLKS: {
1625 xfs_fsop_resblks_t out;
1626
1627 if (!capable(CAP_SYS_ADMIN))
1628 return -EPERM;
1629
1630 error = xfs_reserve_blocks(mp, NULL, &out);
1631 if (error)
1632 return -error;
1633
1634 if (copy_to_user(arg, &out, sizeof(out)))
1635 return -XFS_ERROR(EFAULT);
1636
1637 return 0;
1638 }
1639
1640 case XFS_IOC_FSGROWFSDATA: {
1641 xfs_growfs_data_t in;
1642
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001643 if (copy_from_user(&in, arg, sizeof(in)))
1644 return -XFS_ERROR(EFAULT);
1645
Jan Karad9457dc2012-06-12 16:20:39 +02001646 error = mnt_want_write_file(filp);
1647 if (error)
1648 return error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001649 error = xfs_growfs_data(mp, &in);
Jan Karad9457dc2012-06-12 16:20:39 +02001650 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001651 return -error;
1652 }
1653
1654 case XFS_IOC_FSGROWFSLOG: {
1655 xfs_growfs_log_t in;
1656
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001657 if (copy_from_user(&in, arg, sizeof(in)))
1658 return -XFS_ERROR(EFAULT);
1659
Jan Karad9457dc2012-06-12 16:20:39 +02001660 error = mnt_want_write_file(filp);
1661 if (error)
1662 return error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001663 error = xfs_growfs_log(mp, &in);
Jan Karad9457dc2012-06-12 16:20:39 +02001664 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001665 return -error;
1666 }
1667
1668 case XFS_IOC_FSGROWFSRT: {
1669 xfs_growfs_rt_t in;
1670
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001671 if (copy_from_user(&in, arg, sizeof(in)))
1672 return -XFS_ERROR(EFAULT);
1673
Jan Karad9457dc2012-06-12 16:20:39 +02001674 error = mnt_want_write_file(filp);
1675 if (error)
1676 return error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001677 error = xfs_growfs_rt(mp, &in);
Jan Karad9457dc2012-06-12 16:20:39 +02001678 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001679 return -error;
1680 }
1681
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001682 case XFS_IOC_GOINGDOWN: {
1683 __uint32_t in;
1684
1685 if (!capable(CAP_SYS_ADMIN))
1686 return -EPERM;
1687
1688 if (get_user(in, (__uint32_t __user *)arg))
1689 return -XFS_ERROR(EFAULT);
1690
1691 error = xfs_fs_goingdown(mp, in);
1692 return -error;
1693 }
1694
1695 case XFS_IOC_ERROR_INJECTION: {
1696 xfs_error_injection_t in;
1697
1698 if (!capable(CAP_SYS_ADMIN))
1699 return -EPERM;
1700
1701 if (copy_from_user(&in, arg, sizeof(in)))
1702 return -XFS_ERROR(EFAULT);
1703
1704 error = xfs_errortag_add(in.errtag, mp);
1705 return -error;
1706 }
1707
1708 case XFS_IOC_ERROR_CLEARALL:
1709 if (!capable(CAP_SYS_ADMIN))
1710 return -EPERM;
1711
1712 error = xfs_errortag_clearall(mp, 1);
1713 return -error;
1714
Brian Foster8ca149d2012-11-07 12:21:12 -05001715 case XFS_IOC_FREE_EOFBLOCKS: {
1716 struct xfs_eofblocks eofb;
1717
1718 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1719 return -XFS_ERROR(EFAULT);
1720
1721 if (eofb.eof_version != XFS_EOFBLOCKS_VERSION)
1722 return -XFS_ERROR(EINVAL);
1723
1724 if (eofb.eof_flags & ~XFS_EOF_FLAGS_VALID)
1725 return -XFS_ERROR(EINVAL);
1726
Brian Foster3e3f9f52012-11-07 12:21:13 -05001727 if (memchr_inv(&eofb.pad32, 0, sizeof(eofb.pad32)) ||
1728 memchr_inv(eofb.pad64, 0, sizeof(eofb.pad64)))
Brian Foster8ca149d2012-11-07 12:21:12 -05001729 return -XFS_ERROR(EINVAL);
1730
1731 error = xfs_icache_free_eofblocks(mp, &eofb);
1732 return -error;
1733 }
1734
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001735 default:
1736 return -ENOTTY;
1737 }
1738}