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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"
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include "xfs_log.h"
21#include "xfs_trans.h"
22#include "xfs_sb.h"
Nathan Scotta844f452005-11-02 14:38:42 +110023#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include "xfs_alloc.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include "xfs_mount.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include "xfs_bmap_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "xfs_dinode.h"
28#include "xfs_inode.h"
Hannes Eder7bf446f2009-03-05 15:20:25 +010029#include "xfs_ioctl.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include "xfs_rtalloc.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include "xfs_itable.h"
Nathan Scotta844f452005-11-02 14:38:42 +110032#include "xfs_error.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include "xfs_attr.h"
Nathan Scotta844f452005-11-02 14:38:42 +110034#include "xfs_bmap.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include "xfs_buf_item.h"
36#include "xfs_utils.h"
37#include "xfs_dfrag.h"
38#include "xfs_fsops.h"
Christoph Hellwig993386c2007-08-28 16:12:30 +100039#include "xfs_vnodeops.h"
Christoph Hellwiga46db602011-01-07 13:02:04 +000040#include "xfs_discard.h"
Christoph Hellwig25fe55e2008-07-18 17:13:20 +100041#include "xfs_quota.h"
42#include "xfs_inode_item.h"
Christoph Hellwigd296d302009-01-19 02:02:57 +010043#include "xfs_export.h"
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000044#include "xfs_trace.h"
Brian Foster8ca149d2012-11-07 12:21:12 -050045#include "xfs_icache.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
Christoph Hellwigd296d302009-01-19 02:02:57 +0100251 fd = get_unused_fd();
252 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
353STATIC int
354xfs_fssetdm_by_handle(
Christoph Hellwigd296d302009-01-19 02:02:57 +0100355 struct file *parfilp,
356 void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357{
358 int error;
359 struct fsdmidata fsd;
360 xfs_fsop_setdm_handlereq_t dmhreq;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100361 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362
363 if (!capable(CAP_MKNOD))
364 return -XFS_ERROR(EPERM);
365 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
366 return -XFS_ERROR(EFAULT);
367
Jan Karad9457dc2012-06-12 16:20:39 +0200368 error = mnt_want_write_file(parfilp);
369 if (error)
370 return error;
371
Christoph Hellwigd296d302009-01-19 02:02:57 +0100372 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
Jan Karad9457dc2012-06-12 16:20:39 +0200373 if (IS_ERR(dentry)) {
374 mnt_drop_write_file(parfilp);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100375 return PTR_ERR(dentry);
Jan Karad9457dc2012-06-12 16:20:39 +0200376 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
Christoph Hellwigd296d302009-01-19 02:02:57 +0100378 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000379 error = -XFS_ERROR(EPERM);
380 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 }
382
383 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000384 error = -XFS_ERROR(EFAULT);
385 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 }
387
Christoph Hellwigd296d302009-01-19 02:02:57 +0100388 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000389 fsd.fsd_dmstate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000391 out:
Jan Karad9457dc2012-06-12 16:20:39 +0200392 mnt_drop_write_file(parfilp);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100393 dput(dentry);
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000394 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395}
396
397STATIC int
398xfs_attrlist_by_handle(
Christoph Hellwigd296d302009-01-19 02:02:57 +0100399 struct file *parfilp,
400 void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401{
Christoph Hellwigd296d302009-01-19 02:02:57 +0100402 int error = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 attrlist_cursor_kern_t *cursor;
404 xfs_fsop_attrlist_handlereq_t al_hreq;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100405 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 char *kbuf;
407
408 if (!capable(CAP_SYS_ADMIN))
409 return -XFS_ERROR(EPERM);
410 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
411 return -XFS_ERROR(EFAULT);
412 if (al_hreq.buflen > XATTR_LIST_MAX)
413 return -XFS_ERROR(EINVAL);
414
Christoph Hellwig90ad58a2008-06-27 13:32:19 +1000415 /*
416 * Reject flags, only allow namespaces.
417 */
418 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
419 return -XFS_ERROR(EINVAL);
420
Christoph Hellwigd296d302009-01-19 02:02:57 +0100421 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
422 if (IS_ERR(dentry))
423 return PTR_ERR(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424
Eric Sandeendd700d92013-04-04 00:05:13 -0500425 kbuf = kmem_zalloc(al_hreq.buflen, KM_SLEEP | KM_MAYFAIL);
426 if (!kbuf) {
427 kbuf = kmem_zalloc_large(al_hreq.buflen);
428 if (!kbuf)
429 goto out_dput;
430 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431
432 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100433 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000434 al_hreq.flags, cursor);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 if (error)
436 goto out_kfree;
437
438 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
439 error = -EFAULT;
440
441 out_kfree:
Eric Sandeendd700d92013-04-04 00:05:13 -0500442 if (is_vmalloc_addr(kbuf))
443 kmem_free_large(kbuf);
444 else
445 kmem_free(kbuf);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100446 out_dput:
447 dput(dentry);
448 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449}
450
sandeen@sandeen.net28750972008-11-25 21:20:15 -0600451int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452xfs_attrmulti_attr_get(
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000453 struct inode *inode,
Dave Chinnera9273ca2010-01-20 10:47:48 +1100454 unsigned char *name,
455 unsigned char __user *ubuf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 __uint32_t *len,
457 __uint32_t flags)
458{
Dave Chinnera9273ca2010-01-20 10:47:48 +1100459 unsigned char *kbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 int error = EFAULT;
Barry Naujoke8b0eba2008-04-22 17:34:31 +1000461
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 if (*len > XATTR_SIZE_MAX)
463 return EINVAL;
Dave Chinnerad650f52012-03-07 04:50:21 +0000464 kbuf = kmem_zalloc(*len, KM_SLEEP | KM_MAYFAIL);
465 if (!kbuf) {
466 kbuf = kmem_zalloc_large(*len);
467 if (!kbuf)
468 return ENOMEM;
469 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470
Barry Naujoke8b0eba2008-04-22 17:34:31 +1000471 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 if (error)
473 goto out_kfree;
474
475 if (copy_to_user(ubuf, kbuf, *len))
476 error = EFAULT;
477
478 out_kfree:
Dave Chinnerad650f52012-03-07 04:50:21 +0000479 if (is_vmalloc_addr(kbuf))
480 kmem_free_large(kbuf);
481 else
482 kmem_free(kbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 return error;
484}
485
sandeen@sandeen.net28750972008-11-25 21:20:15 -0600486int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487xfs_attrmulti_attr_set(
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000488 struct inode *inode,
Dave Chinnera9273ca2010-01-20 10:47:48 +1100489 unsigned char *name,
490 const unsigned char __user *ubuf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 __uint32_t len,
492 __uint32_t flags)
493{
Dave Chinnera9273ca2010-01-20 10:47:48 +1100494 unsigned char *kbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 int error = EFAULT;
496
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000497 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 return EPERM;
499 if (len > XATTR_SIZE_MAX)
500 return EINVAL;
501
Li Zefan0e639bd2009-04-08 15:08:04 +0800502 kbuf = memdup_user(ubuf, len);
503 if (IS_ERR(kbuf))
504 return PTR_ERR(kbuf);
Barry Naujoke8b0eba2008-04-22 17:34:31 +1000505
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000506 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 return error;
509}
510
sandeen@sandeen.net28750972008-11-25 21:20:15 -0600511int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512xfs_attrmulti_attr_remove(
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000513 struct inode *inode,
Dave Chinnera9273ca2010-01-20 10:47:48 +1100514 unsigned char *name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 __uint32_t flags)
516{
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000517 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 return EPERM;
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000519 return xfs_attr_remove(XFS_I(inode), name, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520}
521
522STATIC int
523xfs_attrmulti_by_handle(
Dave Hansen42a74f22008-02-15 14:37:46 -0800524 struct file *parfilp,
Christoph Hellwigd296d302009-01-19 02:02:57 +0100525 void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526{
527 int error;
528 xfs_attr_multiop_t *ops;
529 xfs_fsop_attrmulti_handlereq_t am_hreq;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100530 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 unsigned int i, size;
Dave Chinnera9273ca2010-01-20 10:47:48 +1100532 unsigned char *attr_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533
534 if (!capable(CAP_SYS_ADMIN))
535 return -XFS_ERROR(EPERM);
536 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
537 return -XFS_ERROR(EFAULT);
538
Zhitong Wangfda168c2010-03-23 09:51:22 +1100539 /* overflow check */
540 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
541 return -E2BIG;
542
Christoph Hellwigd296d302009-01-19 02:02:57 +0100543 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
544 if (IS_ERR(dentry))
545 return PTR_ERR(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546
547 error = E2BIG;
Christoph Hellwige182f572008-06-27 13:32:31 +1000548 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 if (!size || size > 16 * PAGE_SIZE)
Christoph Hellwigd296d302009-01-19 02:02:57 +0100550 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551
Li Zefan0e639bd2009-04-08 15:08:04 +0800552 ops = memdup_user(am_hreq.ops, size);
553 if (IS_ERR(ops)) {
554 error = PTR_ERR(ops);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100555 goto out_dput;
Li Zefan0e639bd2009-04-08 15:08:04 +0800556 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557
558 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
559 if (!attr_name)
560 goto out_kfree_ops;
561
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 error = 0;
563 for (i = 0; i < am_hreq.opcount; i++) {
Dave Chinnera9273ca2010-01-20 10:47:48 +1100564 ops[i].am_error = strncpy_from_user((char *)attr_name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 ops[i].am_attrname, MAXNAMELEN);
566 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
567 error = -ERANGE;
568 if (ops[i].am_error < 0)
569 break;
570
571 switch (ops[i].am_opcode) {
572 case ATTR_OP_GET:
Christoph Hellwigd296d302009-01-19 02:02:57 +0100573 ops[i].am_error = xfs_attrmulti_attr_get(
574 dentry->d_inode, attr_name,
575 ops[i].am_attrvalue, &ops[i].am_length,
576 ops[i].am_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 break;
578 case ATTR_OP_SET:
Al Viroa561be72011-11-23 11:57:51 -0500579 ops[i].am_error = mnt_want_write_file(parfilp);
Dave Hansen42a74f22008-02-15 14:37:46 -0800580 if (ops[i].am_error)
581 break;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100582 ops[i].am_error = xfs_attrmulti_attr_set(
583 dentry->d_inode, attr_name,
584 ops[i].am_attrvalue, ops[i].am_length,
585 ops[i].am_flags);
Al Viro2a79f172011-12-09 08:06:57 -0500586 mnt_drop_write_file(parfilp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 break;
588 case ATTR_OP_REMOVE:
Al Viroa561be72011-11-23 11:57:51 -0500589 ops[i].am_error = mnt_want_write_file(parfilp);
Dave Hansen42a74f22008-02-15 14:37:46 -0800590 if (ops[i].am_error)
591 break;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100592 ops[i].am_error = xfs_attrmulti_attr_remove(
593 dentry->d_inode, attr_name,
594 ops[i].am_flags);
Al Viro2a79f172011-12-09 08:06:57 -0500595 mnt_drop_write_file(parfilp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 break;
597 default:
598 ops[i].am_error = EINVAL;
599 }
600 }
601
602 if (copy_to_user(am_hreq.ops, ops, size))
603 error = XFS_ERROR(EFAULT);
604
605 kfree(attr_name);
606 out_kfree_ops:
607 kfree(ops);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100608 out_dput:
609 dput(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 return -error;
611}
612
sandeen@sandeen.netd5547f92008-11-25 21:20:08 -0600613int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614xfs_ioc_space(
Christoph Hellwig993386c2007-08-28 16:12:30 +1000615 struct xfs_inode *ip,
Alexey Dobriyanf37ea142006-09-28 10:52:04 +1000616 struct inode *inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 struct file *filp,
618 int ioflags,
619 unsigned int cmd,
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600620 xfs_flock64_t *bf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 int attr_flags = 0;
623 int error;
624
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600625 /*
626 * Only allow the sys admin to reserve space unless
627 * unwritten extents are enabled.
628 */
629 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
630 !capable(CAP_SYS_ADMIN))
631 return -XFS_ERROR(EPERM);
632
Alexey Dobriyanf37ea142006-09-28 10:52:04 +1000633 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 return -XFS_ERROR(EPERM);
635
Eric Sandeenad4a8ac2005-09-02 16:41:16 +1000636 if (!(filp->f_mode & FMODE_WRITE))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 return -XFS_ERROR(EBADF);
638
Alexey Dobriyanf37ea142006-09-28 10:52:04 +1000639 if (!S_ISREG(inode->i_mode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 return -XFS_ERROR(EINVAL);
641
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
Christoph Hellwig0f285c82008-07-18 17:13:28 +1000643 attr_flags |= XFS_ATTR_NONBLOCK;
Dave Chinner82878892011-03-26 09:13:08 +1100644
645 if (filp->f_flags & O_DSYNC)
646 attr_flags |= XFS_ATTR_SYNC;
647
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 if (ioflags & IO_INVIS)
Christoph Hellwig0f285c82008-07-18 17:13:28 +1000649 attr_flags |= XFS_ATTR_DMI;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650
Jan Karad9457dc2012-06-12 16:20:39 +0200651 error = mnt_want_write_file(filp);
652 if (error)
653 return error;
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600654 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
Jan Karad9457dc2012-06-12 16:20:39 +0200655 mnt_drop_write_file(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 return -error;
657}
658
659STATIC int
660xfs_ioc_bulkstat(
661 xfs_mount_t *mp,
662 unsigned int cmd,
663 void __user *arg)
664{
665 xfs_fsop_bulkreq_t bulkreq;
666 int count; /* # of records returned */
667 xfs_ino_t inlast; /* last inode number */
668 int done;
669 int error;
670
671 /* done = 1 if there are more stats to get and if bulkstat */
672 /* should be called again (unused here, but used in dmapi) */
673
674 if (!capable(CAP_SYS_ADMIN))
675 return -EPERM;
676
677 if (XFS_FORCED_SHUTDOWN(mp))
678 return -XFS_ERROR(EIO);
679
680 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
681 return -XFS_ERROR(EFAULT);
682
683 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
684 return -XFS_ERROR(EFAULT);
685
686 if ((count = bulkreq.icount) <= 0)
687 return -XFS_ERROR(EINVAL);
688
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100689 if (bulkreq.ubuffer == NULL)
690 return -XFS_ERROR(EINVAL);
691
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 if (cmd == XFS_IOC_FSINUMBERS)
693 error = xfs_inumbers(mp, &inlast, &count,
Michal Marekfaa63e92007-07-11 11:10:19 +1000694 bulkreq.ubuffer, xfs_inumbers_fmt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
696 error = xfs_bulkstat_single(mp, &inlast,
697 bulkreq.ubuffer, &done);
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100698 else /* XFS_IOC_FSBULKSTAT */
Christoph Hellwig7dce11d2010-06-23 18:11:11 +1000699 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
700 sizeof(xfs_bstat_t), bulkreq.ubuffer,
701 &done);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702
703 if (error)
704 return -error;
705
706 if (bulkreq.ocount != NULL) {
707 if (copy_to_user(bulkreq.lastip, &inlast,
708 sizeof(xfs_ino_t)))
709 return -XFS_ERROR(EFAULT);
710
711 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
712 return -XFS_ERROR(EFAULT);
713 }
714
715 return 0;
716}
717
718STATIC int
719xfs_ioc_fsgeometry_v1(
720 xfs_mount_t *mp,
721 void __user *arg)
722{
Alex Eldereeb20362011-03-01 17:50:00 +0000723 xfs_fsop_geom_t fsgeo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 int error;
725
Alex Eldereeb20362011-03-01 17:50:00 +0000726 error = xfs_fs_geometry(mp, &fsgeo, 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 if (error)
728 return -error;
729
Alex Eldereeb20362011-03-01 17:50:00 +0000730 /*
731 * Caller should have passed an argument of type
732 * xfs_fsop_geom_v1_t. This is a proper subset of the
733 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
734 */
735 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 return -XFS_ERROR(EFAULT);
737 return 0;
738}
739
740STATIC int
741xfs_ioc_fsgeometry(
742 xfs_mount_t *mp,
743 void __user *arg)
744{
745 xfs_fsop_geom_t fsgeo;
746 int error;
747
748 error = xfs_fs_geometry(mp, &fsgeo, 4);
749 if (error)
750 return -error;
751
752 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
753 return -XFS_ERROR(EFAULT);
754 return 0;
755}
756
757/*
758 * Linux extended inode flags interface.
759 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760
761STATIC unsigned int
762xfs_merge_ioc_xflags(
763 unsigned int flags,
764 unsigned int start)
765{
766 unsigned int xflags = start;
767
Eric Sandeen39058a02007-02-10 18:37:10 +1100768 if (flags & FS_IMMUTABLE_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 xflags |= XFS_XFLAG_IMMUTABLE;
770 else
771 xflags &= ~XFS_XFLAG_IMMUTABLE;
Eric Sandeen39058a02007-02-10 18:37:10 +1100772 if (flags & FS_APPEND_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 xflags |= XFS_XFLAG_APPEND;
774 else
775 xflags &= ~XFS_XFLAG_APPEND;
Eric Sandeen39058a02007-02-10 18:37:10 +1100776 if (flags & FS_SYNC_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 xflags |= XFS_XFLAG_SYNC;
778 else
779 xflags &= ~XFS_XFLAG_SYNC;
Eric Sandeen39058a02007-02-10 18:37:10 +1100780 if (flags & FS_NOATIME_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 xflags |= XFS_XFLAG_NOATIME;
782 else
783 xflags &= ~XFS_XFLAG_NOATIME;
Eric Sandeen39058a02007-02-10 18:37:10 +1100784 if (flags & FS_NODUMP_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785 xflags |= XFS_XFLAG_NODUMP;
786 else
787 xflags &= ~XFS_XFLAG_NODUMP;
788
789 return xflags;
790}
791
792STATIC unsigned int
793xfs_di2lxflags(
794 __uint16_t di_flags)
795{
796 unsigned int flags = 0;
797
798 if (di_flags & XFS_DIFLAG_IMMUTABLE)
Eric Sandeen39058a02007-02-10 18:37:10 +1100799 flags |= FS_IMMUTABLE_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 if (di_flags & XFS_DIFLAG_APPEND)
Eric Sandeen39058a02007-02-10 18:37:10 +1100801 flags |= FS_APPEND_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 if (di_flags & XFS_DIFLAG_SYNC)
Eric Sandeen39058a02007-02-10 18:37:10 +1100803 flags |= FS_SYNC_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 if (di_flags & XFS_DIFLAG_NOATIME)
Eric Sandeen39058a02007-02-10 18:37:10 +1100805 flags |= FS_NOATIME_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 if (di_flags & XFS_DIFLAG_NODUMP)
Eric Sandeen39058a02007-02-10 18:37:10 +1100807 flags |= FS_NODUMP_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 return flags;
809}
810
811STATIC int
Christoph Hellwigc83bfab2007-10-11 17:47:00 +1000812xfs_ioc_fsgetxattr(
813 xfs_inode_t *ip,
814 int attr,
815 void __user *arg)
816{
817 struct fsxattr fa;
818
Dan Rosenberga122eb22010-09-06 18:24:57 -0400819 memset(&fa, 0, sizeof(struct fsxattr));
820
Christoph Hellwigc83bfab2007-10-11 17:47:00 +1000821 xfs_ilock(ip, XFS_ILOCK_SHARED);
822 fa.fsx_xflags = xfs_ip2xflags(ip);
823 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000824 fa.fsx_projid = xfs_get_projid(ip);
Christoph Hellwigc83bfab2007-10-11 17:47:00 +1000825
826 if (attr) {
827 if (ip->i_afp) {
828 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
829 fa.fsx_nextents = ip->i_afp->if_bytes /
830 sizeof(xfs_bmbt_rec_t);
831 else
832 fa.fsx_nextents = ip->i_d.di_anextents;
833 } else
834 fa.fsx_nextents = 0;
835 } else {
836 if (ip->i_df.if_flags & XFS_IFEXTENTS)
837 fa.fsx_nextents = ip->i_df.if_bytes /
838 sizeof(xfs_bmbt_rec_t);
839 else
840 fa.fsx_nextents = ip->i_d.di_nextents;
841 }
842 xfs_iunlock(ip, XFS_ILOCK_SHARED);
843
844 if (copy_to_user(arg, &fa, sizeof(fa)))
845 return -EFAULT;
846 return 0;
847}
848
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000849STATIC void
850xfs_set_diflags(
851 struct xfs_inode *ip,
852 unsigned int xflags)
853{
854 unsigned int di_flags;
855
856 /* can't set PREALLOC this way, just preserve it */
857 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
858 if (xflags & XFS_XFLAG_IMMUTABLE)
859 di_flags |= XFS_DIFLAG_IMMUTABLE;
860 if (xflags & XFS_XFLAG_APPEND)
861 di_flags |= XFS_DIFLAG_APPEND;
862 if (xflags & XFS_XFLAG_SYNC)
863 di_flags |= XFS_DIFLAG_SYNC;
864 if (xflags & XFS_XFLAG_NOATIME)
865 di_flags |= XFS_DIFLAG_NOATIME;
866 if (xflags & XFS_XFLAG_NODUMP)
867 di_flags |= XFS_DIFLAG_NODUMP;
868 if (xflags & XFS_XFLAG_PROJINHERIT)
869 di_flags |= XFS_DIFLAG_PROJINHERIT;
870 if (xflags & XFS_XFLAG_NODEFRAG)
871 di_flags |= XFS_DIFLAG_NODEFRAG;
872 if (xflags & XFS_XFLAG_FILESTREAM)
873 di_flags |= XFS_DIFLAG_FILESTREAM;
Al Viroabbede12011-07-26 02:31:30 -0400874 if (S_ISDIR(ip->i_d.di_mode)) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000875 if (xflags & XFS_XFLAG_RTINHERIT)
876 di_flags |= XFS_DIFLAG_RTINHERIT;
877 if (xflags & XFS_XFLAG_NOSYMLINKS)
878 di_flags |= XFS_DIFLAG_NOSYMLINKS;
879 if (xflags & XFS_XFLAG_EXTSZINHERIT)
880 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
Al Viroabbede12011-07-26 02:31:30 -0400881 } else if (S_ISREG(ip->i_d.di_mode)) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000882 if (xflags & XFS_XFLAG_REALTIME)
883 di_flags |= XFS_DIFLAG_REALTIME;
884 if (xflags & XFS_XFLAG_EXTSIZE)
885 di_flags |= XFS_DIFLAG_EXTSIZE;
886 }
887
888 ip->i_d.di_flags = di_flags;
889}
890
Christoph Hellwigf13fae22008-07-21 16:16:15 +1000891STATIC void
892xfs_diflags_to_linux(
893 struct xfs_inode *ip)
894{
David Chinnere4f75292008-08-13 16:00:45 +1000895 struct inode *inode = VFS_I(ip);
Christoph Hellwigf13fae22008-07-21 16:16:15 +1000896 unsigned int xflags = xfs_ip2xflags(ip);
897
898 if (xflags & XFS_XFLAG_IMMUTABLE)
899 inode->i_flags |= S_IMMUTABLE;
900 else
901 inode->i_flags &= ~S_IMMUTABLE;
902 if (xflags & XFS_XFLAG_APPEND)
903 inode->i_flags |= S_APPEND;
904 else
905 inode->i_flags &= ~S_APPEND;
906 if (xflags & XFS_XFLAG_SYNC)
907 inode->i_flags |= S_SYNC;
908 else
909 inode->i_flags &= ~S_SYNC;
910 if (xflags & XFS_XFLAG_NOATIME)
911 inode->i_flags |= S_NOATIME;
912 else
913 inode->i_flags &= ~S_NOATIME;
914}
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000915
916#define FSX_PROJID 1
917#define FSX_EXTSIZE 2
918#define FSX_XFLAGS 4
919#define FSX_NONBLOCK 8
920
921STATIC int
922xfs_ioctl_setattr(
923 xfs_inode_t *ip,
924 struct fsxattr *fa,
925 int mask)
926{
927 struct xfs_mount *mp = ip->i_mount;
928 struct xfs_trans *tp;
929 unsigned int lock_flags = 0;
Christoph Hellwig7d095252009-06-08 15:33:32 +0200930 struct xfs_dquot *udqp = NULL;
931 struct xfs_dquot *gdqp = NULL;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000932 struct xfs_dquot *olddquot = NULL;
933 int code;
934
Christoph Hellwigcca28fb2010-06-24 11:57:09 +1000935 trace_xfs_ioctl_setattr(ip);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000936
937 if (mp->m_flags & XFS_MOUNT_RDONLY)
938 return XFS_ERROR(EROFS);
939 if (XFS_FORCED_SHUTDOWN(mp))
940 return XFS_ERROR(EIO);
941
942 /*
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000943 * Disallow 32bit project ids when projid32bit feature is not enabled.
Arkadiusz Mi?kiewicz23963e52010-08-26 10:19:43 +0000944 */
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000945 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
946 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
Arkadiusz Mi?kiewicz23963e52010-08-26 10:19:43 +0000947 return XFS_ERROR(EINVAL);
948
949 /*
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000950 * If disk quotas is on, we make sure that the dquots do exist on disk,
951 * before we start any other transactions. Trying to do this later
952 * is messy. We don't care to take a readlock to look at the ids
953 * in inode here, because we can't hold it across the trans_reserve.
954 * If the IDs do change before we take the ilock, we're covered
955 * because the i_*dquot fields will get updated anyway.
956 */
957 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
Christoph Hellwig7d095252009-06-08 15:33:32 +0200958 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000959 ip->i_d.di_gid, fa->fsx_projid,
960 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
961 if (code)
962 return code;
963 }
964
965 /*
966 * For the other attributes, we acquire the inode lock and
967 * first do an error checking pass.
968 */
969 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
970 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
971 if (code)
972 goto error_return;
973
974 lock_flags = XFS_ILOCK_EXCL;
975 xfs_ilock(ip, lock_flags);
976
977 /*
978 * CAP_FOWNER overrides the following restrictions:
979 *
980 * The user ID of the calling process must be equal
981 * to the file owner ID, except in cases where the
982 * CAP_FSETID capability is applicable.
983 */
David Howells91b7771252008-10-31 15:50:04 +1100984 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000985 code = XFS_ERROR(EPERM);
986 goto error_return;
987 }
988
989 /*
990 * Do a quota reservation only if projid is actually going to change.
991 */
992 if (mask & FSX_PROJID) {
Christoph Hellwig7d095252009-06-08 15:33:32 +0200993 if (XFS_IS_QUOTA_RUNNING(mp) &&
994 XFS_IS_PQUOTA_ON(mp) &&
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000995 xfs_get_projid(ip) != fa->fsx_projid) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000996 ASSERT(tp);
Christoph Hellwig7d095252009-06-08 15:33:32 +0200997 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000998 capable(CAP_FOWNER) ?
999 XFS_QMOPT_FORCE_RES : 0);
1000 if (code) /* out of quota */
1001 goto error_return;
1002 }
1003 }
1004
1005 if (mask & FSX_EXTSIZE) {
1006 /*
1007 * Can't change extent size if any extents are allocated.
1008 */
1009 if (ip->i_d.di_nextents &&
1010 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
1011 fa->fsx_extsize)) {
1012 code = XFS_ERROR(EINVAL); /* EFBIG? */
1013 goto error_return;
1014 }
1015
1016 /*
1017 * Extent size must be a multiple of the appropriate block
Dave Chinner53158372011-01-27 12:18:18 +11001018 * size, if set at all. It must also be smaller than the
1019 * maximum extent size supported by the filesystem.
1020 *
1021 * Also, for non-realtime files, limit the extent size hint to
1022 * half the size of the AGs in the filesystem so alignment
1023 * doesn't result in extents larger than an AG.
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001024 */
1025 if (fa->fsx_extsize != 0) {
Dave Chinner53158372011-01-27 12:18:18 +11001026 xfs_extlen_t size;
1027 xfs_fsblock_t extsize_fsb;
1028
1029 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1030 if (extsize_fsb > MAXEXTLEN) {
1031 code = XFS_ERROR(EINVAL);
1032 goto error_return;
1033 }
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001034
1035 if (XFS_IS_REALTIME_INODE(ip) ||
1036 ((mask & FSX_XFLAGS) &&
1037 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1038 size = mp->m_sb.sb_rextsize <<
1039 mp->m_sb.sb_blocklog;
1040 } else {
1041 size = mp->m_sb.sb_blocksize;
Dave Chinner53158372011-01-27 12:18:18 +11001042 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1043 code = XFS_ERROR(EINVAL);
1044 goto error_return;
1045 }
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001046 }
1047
1048 if (fa->fsx_extsize % size) {
1049 code = XFS_ERROR(EINVAL);
1050 goto error_return;
1051 }
1052 }
1053 }
1054
1055
1056 if (mask & FSX_XFLAGS) {
1057 /*
1058 * Can't change realtime flag if any extents are allocated.
1059 */
1060 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1061 (XFS_IS_REALTIME_INODE(ip)) !=
1062 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1063 code = XFS_ERROR(EINVAL); /* EFBIG? */
1064 goto error_return;
1065 }
1066
1067 /*
1068 * If realtime flag is set then must have realtime data.
1069 */
1070 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1071 if ((mp->m_sb.sb_rblocks == 0) ||
1072 (mp->m_sb.sb_rextsize == 0) ||
1073 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1074 code = XFS_ERROR(EINVAL);
1075 goto error_return;
1076 }
1077 }
1078
1079 /*
1080 * Can't modify an immutable/append-only file unless
1081 * we have appropriate permission.
1082 */
1083 if ((ip->i_d.di_flags &
1084 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1085 (fa->fsx_xflags &
1086 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1087 !capable(CAP_LINUX_IMMUTABLE)) {
1088 code = XFS_ERROR(EPERM);
1089 goto error_return;
1090 }
1091 }
1092
Christoph Hellwigddc34152011-09-19 15:00:54 +00001093 xfs_trans_ijoin(tp, ip, 0);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001094
1095 /*
1096 * Change file ownership. Must be the owner or privileged.
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001097 */
1098 if (mask & FSX_PROJID) {
1099 /*
1100 * CAP_FSETID overrides the following restrictions:
1101 *
1102 * The set-user-ID and set-group-ID bits of a file will be
1103 * cleared upon successful return from chown()
1104 */
1105 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1106 !capable(CAP_FSETID))
1107 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1108
1109 /*
1110 * Change the ownerships and register quota modifications
1111 * in the transaction.
1112 */
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001113 if (xfs_get_projid(ip) != fa->fsx_projid) {
Christoph Hellwig7d095252009-06-08 15:33:32 +02001114 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1115 olddquot = xfs_qm_vop_chown(tp, ip,
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001116 &ip->i_gdquot, gdqp);
1117 }
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001118 xfs_set_projid(ip, fa->fsx_projid);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001119
1120 /*
1121 * We may have to rev the inode as well as
1122 * the superblock version number since projids didn't
1123 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1124 */
Christoph Hellwig51ce16d2008-11-28 14:23:39 +11001125 if (ip->i_d.di_version == 1)
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001126 xfs_bump_ino_vers2(tp, ip);
1127 }
1128
1129 }
1130
1131 if (mask & FSX_EXTSIZE)
1132 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
Christoph Hellwigf13fae22008-07-21 16:16:15 +10001133 if (mask & FSX_XFLAGS) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001134 xfs_set_diflags(ip, fa->fsx_xflags);
Christoph Hellwigf13fae22008-07-21 16:16:15 +10001135 xfs_diflags_to_linux(ip);
1136 }
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001137
Dave Chinnerdcd79a12010-09-28 12:27:25 +10001138 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001139 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001140
1141 XFS_STATS_INC(xs_ig_attrchg);
1142
1143 /*
1144 * If this is a synchronous mount, make sure that the
1145 * transaction goes to disk before returning to the user.
1146 * This is slightly sub-optimal in that truncates require
1147 * two sync transactions instead of one for wsync filesystems.
1148 * One for the truncate and one for the timestamps since we
1149 * don't want to change the timestamps unless we're sure the
1150 * truncate worked. Truncates are less than 1% of the laddis
1151 * mix so this probably isn't worth the trouble to optimize.
1152 */
1153 if (mp->m_flags & XFS_MOUNT_WSYNC)
1154 xfs_trans_set_sync(tp);
1155 code = xfs_trans_commit(tp, 0);
1156 xfs_iunlock(ip, lock_flags);
1157
1158 /*
1159 * Release any dquot(s) the inode had kept before chown.
1160 */
Christoph Hellwig7d095252009-06-08 15:33:32 +02001161 xfs_qm_dqrele(olddquot);
1162 xfs_qm_dqrele(udqp);
1163 xfs_qm_dqrele(gdqp);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001164
Christoph Hellwig288699f2010-06-23 18:11:15 +10001165 return code;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001166
1167 error_return:
Christoph Hellwig7d095252009-06-08 15:33:32 +02001168 xfs_qm_dqrele(udqp);
1169 xfs_qm_dqrele(gdqp);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001170 xfs_trans_cancel(tp, 0);
1171 if (lock_flags)
1172 xfs_iunlock(ip, lock_flags);
1173 return code;
1174}
1175
Christoph Hellwigc83bfab2007-10-11 17:47:00 +10001176STATIC int
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001177xfs_ioc_fssetxattr(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178 xfs_inode_t *ip,
1179 struct file *filp,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180 void __user *arg)
1181{
1182 struct fsxattr fa;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001183 unsigned int mask;
Jan Karad9457dc2012-06-12 16:20:39 +02001184 int error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001185
1186 if (copy_from_user(&fa, arg, sizeof(fa)))
1187 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001189 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001190 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001191 mask |= FSX_NONBLOCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192
Jan Karad9457dc2012-06-12 16:20:39 +02001193 error = mnt_want_write_file(filp);
1194 if (error)
1195 return error;
1196 error = xfs_ioctl_setattr(ip, &fa, mask);
1197 mnt_drop_write_file(filp);
1198 return -error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001199}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001201STATIC int
1202xfs_ioc_getxflags(
1203 xfs_inode_t *ip,
1204 void __user *arg)
1205{
1206 unsigned int flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001208 flags = xfs_di2lxflags(ip->i_d.di_flags);
1209 if (copy_to_user(arg, &flags, sizeof(flags)))
1210 return -EFAULT;
1211 return 0;
1212}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001214STATIC int
1215xfs_ioc_setxflags(
1216 xfs_inode_t *ip,
1217 struct file *filp,
1218 void __user *arg)
1219{
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001220 struct fsxattr fa;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001221 unsigned int flags;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001222 unsigned int mask;
Jan Karad9457dc2012-06-12 16:20:39 +02001223 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001225 if (copy_from_user(&flags, arg, sizeof(flags)))
1226 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001228 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1229 FS_NOATIME_FL | FS_NODUMP_FL | \
1230 FS_SYNC_FL))
1231 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001233 mask = FSX_XFLAGS;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001234 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001235 mask |= FSX_NONBLOCK;
1236 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237
Jan Karad9457dc2012-06-12 16:20:39 +02001238 error = mnt_want_write_file(filp);
1239 if (error)
1240 return error;
1241 error = xfs_ioctl_setattr(ip, &fa, mask);
1242 mnt_drop_write_file(filp);
1243 return -error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244}
1245
1246STATIC int
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001247xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1248{
1249 struct getbmap __user *base = *ap;
1250
1251 /* copy only getbmap portion (not getbmapx) */
1252 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1253 return XFS_ERROR(EFAULT);
1254
1255 *ap += sizeof(struct getbmap);
1256 return 0;
1257}
1258
1259STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260xfs_ioc_getbmap(
Christoph Hellwig993386c2007-08-28 16:12:30 +10001261 struct xfs_inode *ip,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262 int ioflags,
1263 unsigned int cmd,
1264 void __user *arg)
1265{
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001266 struct getbmapx bmx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267 int error;
1268
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001269 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270 return -XFS_ERROR(EFAULT);
1271
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001272 if (bmx.bmv_count < 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273 return -XFS_ERROR(EINVAL);
1274
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001275 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276 if (ioflags & IO_INVIS)
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001277 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001279 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1280 (struct getbmap *)arg+1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281 if (error)
1282 return -error;
1283
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001284 /* copy back header - only size of getbmap */
1285 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286 return -XFS_ERROR(EFAULT);
1287 return 0;
1288}
1289
1290STATIC int
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001291xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1292{
1293 struct getbmapx __user *base = *ap;
1294
1295 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1296 return XFS_ERROR(EFAULT);
1297
1298 *ap += sizeof(struct getbmapx);
1299 return 0;
1300}
1301
1302STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303xfs_ioc_getbmapx(
Christoph Hellwig993386c2007-08-28 16:12:30 +10001304 struct xfs_inode *ip,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 void __user *arg)
1306{
1307 struct getbmapx bmx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308 int error;
1309
1310 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1311 return -XFS_ERROR(EFAULT);
1312
1313 if (bmx.bmv_count < 2)
1314 return -XFS_ERROR(EINVAL);
1315
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001316 if (bmx.bmv_iflags & (~BMV_IF_VALID))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317 return -XFS_ERROR(EINVAL);
1318
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001319 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1320 (struct getbmapx *)arg+1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321 if (error)
1322 return -error;
1323
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001324 /* copy back header */
1325 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326 return -XFS_ERROR(EFAULT);
1327
1328 return 0;
1329}
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001330
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001331/*
1332 * Note: some of the ioctl's return positive numbers as a
1333 * byte count indicating success, such as readlink_by_handle.
1334 * So we don't "sign flip" like most other routines. This means
1335 * true errors need to be returned as a negative value.
1336 */
1337long
1338xfs_file_ioctl(
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001339 struct file *filp,
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001340 unsigned int cmd,
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001341 unsigned long p)
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001342{
Al Viro496ad9a2013-01-23 17:07:38 -05001343 struct inode *inode = file_inode(filp);
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001344 struct xfs_inode *ip = XFS_I(inode);
1345 struct xfs_mount *mp = ip->i_mount;
1346 void __user *arg = (void __user *)p;
1347 int ioflags = 0;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001348 int error;
1349
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001350 if (filp->f_mode & FMODE_NOCMTIME)
1351 ioflags |= IO_INVIS;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001352
Christoph Hellwigcca28fb2010-06-24 11:57:09 +10001353 trace_xfs_file_ioctl(ip);
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001354
1355 switch (cmd) {
Christoph Hellwiga46db602011-01-07 13:02:04 +00001356 case FITRIM:
1357 return xfs_ioc_trim(mp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001358 case XFS_IOC_ALLOCSP:
1359 case XFS_IOC_FREESP:
1360 case XFS_IOC_RESVSP:
1361 case XFS_IOC_UNRESVSP:
1362 case XFS_IOC_ALLOCSP64:
1363 case XFS_IOC_FREESP64:
1364 case XFS_IOC_RESVSP64:
Dave Chinner44722352010-08-24 12:02:11 +10001365 case XFS_IOC_UNRESVSP64:
1366 case XFS_IOC_ZERO_RANGE: {
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001367 xfs_flock64_t bf;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001368
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001369 if (copy_from_user(&bf, arg, sizeof(bf)))
1370 return -XFS_ERROR(EFAULT);
1371 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1372 }
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001373 case XFS_IOC_DIOINFO: {
1374 struct dioattr da;
1375 xfs_buftarg_t *target =
1376 XFS_IS_REALTIME_INODE(ip) ?
1377 mp->m_rtdev_targp : mp->m_ddev_targp;
1378
1379 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1380 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1381
1382 if (copy_to_user(arg, &da, sizeof(da)))
1383 return -XFS_ERROR(EFAULT);
1384 return 0;
1385 }
1386
1387 case XFS_IOC_FSBULKSTAT_SINGLE:
1388 case XFS_IOC_FSBULKSTAT:
1389 case XFS_IOC_FSINUMBERS:
1390 return xfs_ioc_bulkstat(mp, cmd, arg);
1391
1392 case XFS_IOC_FSGEOMETRY_V1:
1393 return xfs_ioc_fsgeometry_v1(mp, arg);
1394
1395 case XFS_IOC_FSGEOMETRY:
1396 return xfs_ioc_fsgeometry(mp, arg);
1397
1398 case XFS_IOC_GETVERSION:
1399 return put_user(inode->i_generation, (int __user *)arg);
1400
1401 case XFS_IOC_FSGETXATTR:
1402 return xfs_ioc_fsgetxattr(ip, 0, arg);
1403 case XFS_IOC_FSGETXATTRA:
1404 return xfs_ioc_fsgetxattr(ip, 1, arg);
Lachlan McIlroy3b2816b2008-04-18 12:43:35 +10001405 case XFS_IOC_FSSETXATTR:
Lachlan McIlroy65e67f52008-04-18 12:59:45 +10001406 return xfs_ioc_fssetxattr(ip, filp, arg);
1407 case XFS_IOC_GETXFLAGS:
1408 return xfs_ioc_getxflags(ip, arg);
1409 case XFS_IOC_SETXFLAGS:
1410 return xfs_ioc_setxflags(ip, filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001411
1412 case XFS_IOC_FSSETDM: {
1413 struct fsdmidata dmi;
1414
1415 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1416 return -XFS_ERROR(EFAULT);
1417
Jan Karad9457dc2012-06-12 16:20:39 +02001418 error = mnt_want_write_file(filp);
1419 if (error)
1420 return error;
1421
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001422 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1423 dmi.fsd_dmstate);
Jan Karad9457dc2012-06-12 16:20:39 +02001424 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001425 return -error;
1426 }
1427
1428 case XFS_IOC_GETBMAP:
1429 case XFS_IOC_GETBMAPA:
1430 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1431
1432 case XFS_IOC_GETBMAPX:
1433 return xfs_ioc_getbmapx(ip, arg);
1434
1435 case XFS_IOC_FD_TO_HANDLE:
1436 case XFS_IOC_PATH_TO_HANDLE:
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001437 case XFS_IOC_PATH_TO_FSHANDLE: {
1438 xfs_fsop_handlereq_t hreq;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001439
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001440 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1441 return -XFS_ERROR(EFAULT);
1442 return xfs_find_handle(cmd, &hreq);
1443 }
1444 case XFS_IOC_OPEN_BY_HANDLE: {
1445 xfs_fsop_handlereq_t hreq;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001446
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001447 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1448 return -XFS_ERROR(EFAULT);
Christoph Hellwigd296d302009-01-19 02:02:57 +01001449 return xfs_open_by_handle(filp, &hreq);
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001450 }
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001451 case XFS_IOC_FSSETDM_BY_HANDLE:
Christoph Hellwigd296d302009-01-19 02:02:57 +01001452 return xfs_fssetdm_by_handle(filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001453
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001454 case XFS_IOC_READLINK_BY_HANDLE: {
1455 xfs_fsop_handlereq_t hreq;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001456
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001457 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1458 return -XFS_ERROR(EFAULT);
Christoph Hellwigd296d302009-01-19 02:02:57 +01001459 return xfs_readlink_by_handle(filp, &hreq);
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001460 }
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001461 case XFS_IOC_ATTRLIST_BY_HANDLE:
Christoph Hellwigd296d302009-01-19 02:02:57 +01001462 return xfs_attrlist_by_handle(filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001463
1464 case XFS_IOC_ATTRMULTI_BY_HANDLE:
Christoph Hellwigd296d302009-01-19 02:02:57 +01001465 return xfs_attrmulti_by_handle(filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001466
1467 case XFS_IOC_SWAPEXT: {
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001468 struct xfs_swapext sxp;
1469
1470 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1471 return -XFS_ERROR(EFAULT);
Jan Karad9457dc2012-06-12 16:20:39 +02001472 error = mnt_want_write_file(filp);
1473 if (error)
1474 return error;
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001475 error = xfs_swapext(&sxp);
Jan Karad9457dc2012-06-12 16:20:39 +02001476 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001477 return -error;
1478 }
1479
1480 case XFS_IOC_FSCOUNTS: {
1481 xfs_fsop_counts_t out;
1482
1483 error = xfs_fs_counts(mp, &out);
1484 if (error)
1485 return -error;
1486
1487 if (copy_to_user(arg, &out, sizeof(out)))
1488 return -XFS_ERROR(EFAULT);
1489 return 0;
1490 }
1491
1492 case XFS_IOC_SET_RESBLKS: {
1493 xfs_fsop_resblks_t inout;
1494 __uint64_t in;
1495
1496 if (!capable(CAP_SYS_ADMIN))
1497 return -EPERM;
1498
Eric Sandeend5db0f92010-02-05 22:59:53 +00001499 if (mp->m_flags & XFS_MOUNT_RDONLY)
1500 return -XFS_ERROR(EROFS);
1501
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001502 if (copy_from_user(&inout, arg, sizeof(inout)))
1503 return -XFS_ERROR(EFAULT);
1504
Jan Karad9457dc2012-06-12 16:20:39 +02001505 error = mnt_want_write_file(filp);
1506 if (error)
1507 return error;
1508
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001509 /* input parameter is passed in resblks field of structure */
1510 in = inout.resblks;
1511 error = xfs_reserve_blocks(mp, &in, &inout);
Jan Karad9457dc2012-06-12 16:20:39 +02001512 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001513 if (error)
1514 return -error;
1515
1516 if (copy_to_user(arg, &inout, sizeof(inout)))
1517 return -XFS_ERROR(EFAULT);
1518 return 0;
1519 }
1520
1521 case XFS_IOC_GET_RESBLKS: {
1522 xfs_fsop_resblks_t out;
1523
1524 if (!capable(CAP_SYS_ADMIN))
1525 return -EPERM;
1526
1527 error = xfs_reserve_blocks(mp, NULL, &out);
1528 if (error)
1529 return -error;
1530
1531 if (copy_to_user(arg, &out, sizeof(out)))
1532 return -XFS_ERROR(EFAULT);
1533
1534 return 0;
1535 }
1536
1537 case XFS_IOC_FSGROWFSDATA: {
1538 xfs_growfs_data_t in;
1539
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001540 if (copy_from_user(&in, arg, sizeof(in)))
1541 return -XFS_ERROR(EFAULT);
1542
Jan Karad9457dc2012-06-12 16:20:39 +02001543 error = mnt_want_write_file(filp);
1544 if (error)
1545 return error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001546 error = xfs_growfs_data(mp, &in);
Jan Karad9457dc2012-06-12 16:20:39 +02001547 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001548 return -error;
1549 }
1550
1551 case XFS_IOC_FSGROWFSLOG: {
1552 xfs_growfs_log_t in;
1553
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001554 if (copy_from_user(&in, arg, sizeof(in)))
1555 return -XFS_ERROR(EFAULT);
1556
Jan Karad9457dc2012-06-12 16:20:39 +02001557 error = mnt_want_write_file(filp);
1558 if (error)
1559 return error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001560 error = xfs_growfs_log(mp, &in);
Jan Karad9457dc2012-06-12 16:20:39 +02001561 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001562 return -error;
1563 }
1564
1565 case XFS_IOC_FSGROWFSRT: {
1566 xfs_growfs_rt_t in;
1567
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001568 if (copy_from_user(&in, arg, sizeof(in)))
1569 return -XFS_ERROR(EFAULT);
1570
Jan Karad9457dc2012-06-12 16:20:39 +02001571 error = mnt_want_write_file(filp);
1572 if (error)
1573 return error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001574 error = xfs_growfs_rt(mp, &in);
Jan Karad9457dc2012-06-12 16:20:39 +02001575 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001576 return -error;
1577 }
1578
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001579 case XFS_IOC_GOINGDOWN: {
1580 __uint32_t in;
1581
1582 if (!capable(CAP_SYS_ADMIN))
1583 return -EPERM;
1584
1585 if (get_user(in, (__uint32_t __user *)arg))
1586 return -XFS_ERROR(EFAULT);
1587
1588 error = xfs_fs_goingdown(mp, in);
1589 return -error;
1590 }
1591
1592 case XFS_IOC_ERROR_INJECTION: {
1593 xfs_error_injection_t in;
1594
1595 if (!capable(CAP_SYS_ADMIN))
1596 return -EPERM;
1597
1598 if (copy_from_user(&in, arg, sizeof(in)))
1599 return -XFS_ERROR(EFAULT);
1600
1601 error = xfs_errortag_add(in.errtag, mp);
1602 return -error;
1603 }
1604
1605 case XFS_IOC_ERROR_CLEARALL:
1606 if (!capable(CAP_SYS_ADMIN))
1607 return -EPERM;
1608
1609 error = xfs_errortag_clearall(mp, 1);
1610 return -error;
1611
Brian Foster8ca149d2012-11-07 12:21:12 -05001612 case XFS_IOC_FREE_EOFBLOCKS: {
1613 struct xfs_eofblocks eofb;
1614
1615 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1616 return -XFS_ERROR(EFAULT);
1617
1618 if (eofb.eof_version != XFS_EOFBLOCKS_VERSION)
1619 return -XFS_ERROR(EINVAL);
1620
1621 if (eofb.eof_flags & ~XFS_EOF_FLAGS_VALID)
1622 return -XFS_ERROR(EINVAL);
1623
Brian Foster3e3f9f52012-11-07 12:21:13 -05001624 if (memchr_inv(&eofb.pad32, 0, sizeof(eofb.pad32)) ||
1625 memchr_inv(eofb.pad64, 0, sizeof(eofb.pad64)))
Brian Foster8ca149d2012-11-07 12:21:12 -05001626 return -XFS_ERROR(EINVAL);
1627
1628 error = xfs_icache_free_eofblocks(mp, &eofb);
1629 return -error;
1630 }
1631
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001632 default:
1633 return -ENOTTY;
1634 }
1635}