blob: 91f8ff547ab3771f3df70e631aaf0804256f8eba [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"
Nathan Scotta844f452005-11-02 14:38:42 +110020#include "xfs_bit.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include "xfs_log.h"
Nathan Scotta844f452005-11-02 14:38:42 +110022#include "xfs_inum.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include "xfs_trans.h"
24#include "xfs_sb.h"
Nathan Scotta844f452005-11-02 14:38:42 +110025#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include "xfs_alloc.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "xfs_mount.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include "xfs_bmap_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include "xfs_dinode.h"
30#include "xfs_inode.h"
Hannes Eder7bf446f2009-03-05 15:20:25 +010031#include "xfs_ioctl.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include "xfs_rtalloc.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include "xfs_itable.h"
Nathan Scotta844f452005-11-02 14:38:42 +110034#include "xfs_error.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include "xfs_attr.h"
Nathan Scotta844f452005-11-02 14:38:42 +110036#include "xfs_bmap.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include "xfs_buf_item.h"
38#include "xfs_utils.h"
39#include "xfs_dfrag.h"
40#include "xfs_fsops.h"
Christoph Hellwig993386c2007-08-28 16:12:30 +100041#include "xfs_vnodeops.h"
Christoph Hellwiga46db602011-01-07 13:02:04 +000042#include "xfs_discard.h"
Christoph Hellwig25fe55e2008-07-18 17:13:20 +100043#include "xfs_quota.h"
44#include "xfs_inode_item.h"
Christoph Hellwigd296d302009-01-19 02:02:57 +010045#include "xfs_export.h"
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000046#include "xfs_trace.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
Randy Dunlap16f7e0f2006-01-11 12:17:46 -080048#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#include <linux/dcache.h>
50#include <linux/mount.h>
51#include <linux/namei.h>
52#include <linux/pagemap.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090053#include <linux/slab.h>
Christoph Hellwigd296d302009-01-19 02:02:57 +010054#include <linux/exportfs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
56/*
57 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
58 * a file or fs handle.
59 *
60 * XFS_IOC_PATH_TO_FSHANDLE
61 * returns fs handle for a mount point or path within that mount point
62 * XFS_IOC_FD_TO_HANDLE
63 * returns full handle for a FD opened in user space
64 * XFS_IOC_PATH_TO_HANDLE
65 * returns full handle for a path
66 */
sandeen@sandeen.netd5547f92008-11-25 21:20:08 -060067int
Linus Torvalds1da177e2005-04-16 15:20:36 -070068xfs_find_handle(
69 unsigned int cmd,
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -060070 xfs_fsop_handlereq_t *hreq)
Linus Torvalds1da177e2005-04-16 15:20:36 -070071{
72 int hsize;
73 xfs_handle_t handle;
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 struct inode *inode;
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010075 struct file *file = NULL;
76 struct path path;
77 int error;
78 struct xfs_inode *ip;
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010080 if (cmd == XFS_IOC_FD_TO_HANDLE) {
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -060081 file = fget(hreq->fd);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 if (!file)
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010083 return -EBADF;
84 inode = file->f_path.dentry->d_inode;
85 } else {
86 error = user_lpath((const char __user *)hreq->path, &path);
87 if (error)
88 return error;
89 inode = path.dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 }
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010091 ip = XFS_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -070092
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010093 /*
94 * We can only generate handles for inodes residing on a XFS filesystem,
95 * and only for regular files, directories or symbolic links.
96 */
97 error = -EINVAL;
98 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
99 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100101 error = -EBADF;
102 if (!S_ISREG(inode->i_mode) &&
103 !S_ISDIR(inode->i_mode) &&
104 !S_ISLNK(inode->i_mode))
105 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100108 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100110 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
111 /*
112 * This handle only contains an fsid, zero the rest.
113 */
114 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
115 hsize = sizeof(xfs_fsid_t);
116 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 int lock_mode;
118
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 lock_mode = xfs_ilock_map_shared(ip);
Christoph Hellwigc6143912007-09-14 15:22:37 +1000120 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
121 sizeof(handle.ha_fid.fid_len);
122 handle.ha_fid.fid_pad = 0;
123 handle.ha_fid.fid_gen = ip->i_d.di_gen;
124 handle.ha_fid.fid_ino = ip->i_ino;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 xfs_iunlock_map_shared(ip, lock_mode);
126
127 hsize = XFS_HSIZE(handle);
128 }
129
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100130 error = -EFAULT;
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600131 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100132 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
133 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100135 error = 0;
136
137 out_put:
138 if (cmd == XFS_IOC_FD_TO_HANDLE)
139 fput(file);
140 else
141 path_put(&path);
142 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143}
144
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145/*
Christoph Hellwigd296d302009-01-19 02:02:57 +0100146 * No need to do permission checks on the various pathname components
147 * as the handle operations are privileged.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 */
149STATIC int
Christoph Hellwigd296d302009-01-19 02:02:57 +0100150xfs_handle_acceptable(
151 void *context,
152 struct dentry *dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153{
Christoph Hellwigd296d302009-01-19 02:02:57 +0100154 return 1;
155}
156
157/*
158 * Convert userspace handle data into a dentry.
159 */
160struct dentry *
161xfs_handle_to_dentry(
162 struct file *parfilp,
163 void __user *uhandle,
164 u32 hlen)
165{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 xfs_handle_t handle;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100167 struct xfs_fid64 fid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
169 /*
170 * Only allow handle opens under a directory.
171 */
Christoph Hellwigd296d302009-01-19 02:02:57 +0100172 if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode))
173 return ERR_PTR(-ENOTDIR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
Christoph Hellwigd296d302009-01-19 02:02:57 +0100175 if (hlen != sizeof(xfs_handle_t))
176 return ERR_PTR(-EINVAL);
177 if (copy_from_user(&handle, uhandle, hlen))
178 return ERR_PTR(-EFAULT);
179 if (handle.ha_fid.fid_len !=
180 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
181 return ERR_PTR(-EINVAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182
Christoph Hellwigd296d302009-01-19 02:02:57 +0100183 memset(&fid, 0, sizeof(struct fid));
184 fid.ino = handle.ha_fid.fid_ino;
185 fid.gen = handle.ha_fid.fid_gen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
Christoph Hellwigd296d302009-01-19 02:02:57 +0100187 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
188 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
189 xfs_handle_acceptable, NULL);
190}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
Christoph Hellwigd296d302009-01-19 02:02:57 +0100192STATIC struct dentry *
193xfs_handlereq_to_dentry(
194 struct file *parfilp,
195 xfs_fsop_handlereq_t *hreq)
196{
197 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198}
199
sandeen@sandeen.netd5547f92008-11-25 21:20:08 -0600200int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201xfs_open_by_handle(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 struct file *parfilp,
Christoph Hellwigd296d302009-01-19 02:02:57 +0100203 xfs_fsop_handlereq_t *hreq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204{
David Howells745ca242008-11-14 10:39:22 +1100205 const struct cred *cred = current_cred();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 int error;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100207 int fd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 int permflag;
209 struct file *filp;
210 struct inode *inode;
211 struct dentry *dentry;
Dave Chinner1a1d7722012-03-22 05:15:06 +0000212 fmode_t fmode;
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
Christoph Hellwigd296d302009-01-19 02:02:57 +0100257 filp = dentry_open(dentry, mntget(parfilp->f_path.mnt),
258 hreq->oflags, cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 if (IS_ERR(filp)) {
Christoph Hellwigd296d302009-01-19 02:02:57 +0100260 put_unused_fd(fd);
261 return PTR_ERR(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 }
Christoph Hellwig4d4be482008-12-09 04:47:33 -0500263
Al Viro03209372011-07-25 20:54:24 -0400264 if (S_ISREG(inode->i_mode)) {
Vlad Apostolov2e2e7bb2006-11-11 18:04:47 +1100265 filp->f_flags |= O_NOATIME;
Christoph Hellwig4d4be482008-12-09 04:47:33 -0500266 filp->f_mode |= FMODE_NOCMTIME;
Vlad Apostolov2e2e7bb2006-11-11 18:04:47 +1100267 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
Christoph Hellwigd296d302009-01-19 02:02:57 +0100269 fd_install(fd, filp);
270 return fd;
271
272 out_dput:
273 dput(dentry);
274 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275}
276
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000277/*
278 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
279 * unused first argument.
280 */
281STATIC int
282do_readlink(
283 char __user *buffer,
284 int buflen,
285 const char *link)
286{
287 int len;
288
289 len = PTR_ERR(link);
290 if (IS_ERR(link))
291 goto out;
292
293 len = strlen(link);
294 if (len > (unsigned) buflen)
295 len = buflen;
296 if (copy_to_user(buffer, link, len))
297 len = -EFAULT;
298 out:
299 return len;
300}
301
302
sandeen@sandeen.netd5547f92008-11-25 21:20:08 -0600303int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304xfs_readlink_by_handle(
Christoph Hellwigd296d302009-01-19 02:02:57 +0100305 struct file *parfilp,
306 xfs_fsop_handlereq_t *hreq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307{
Christoph Hellwigd296d302009-01-19 02:02:57 +0100308 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 __u32 olen;
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000310 void *link;
311 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
313 if (!capable(CAP_SYS_ADMIN))
314 return -XFS_ERROR(EPERM);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315
Christoph Hellwigd296d302009-01-19 02:02:57 +0100316 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
317 if (IS_ERR(dentry))
318 return PTR_ERR(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319
320 /* Restrict this handle operation to symlinks only. */
Christoph Hellwigd296d302009-01-19 02:02:57 +0100321 if (!S_ISLNK(dentry->d_inode->i_mode)) {
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000322 error = -XFS_ERROR(EINVAL);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100323 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 }
325
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600326 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000327 error = -XFS_ERROR(EFAULT);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100328 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000331 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100332 if (!link) {
333 error = -XFS_ERROR(ENOMEM);
334 goto out_dput;
335 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
Christoph Hellwigd296d302009-01-19 02:02:57 +0100337 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
Nathan Scott67fcaa72006-06-09 17:00:52 +1000338 if (error)
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000339 goto out_kfree;
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600340 error = do_readlink(hreq->ohandle, olen, link);
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000341 if (error)
342 goto out_kfree;
Nathan Scott67fcaa72006-06-09 17:00:52 +1000343
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000344 out_kfree:
345 kfree(link);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100346 out_dput:
347 dput(dentry);
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000348 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349}
350
351STATIC int
352xfs_fssetdm_by_handle(
Christoph Hellwigd296d302009-01-19 02:02:57 +0100353 struct file *parfilp,
354 void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355{
356 int error;
357 struct fsdmidata fsd;
358 xfs_fsop_setdm_handlereq_t dmhreq;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100359 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360
361 if (!capable(CAP_MKNOD))
362 return -XFS_ERROR(EPERM);
363 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
364 return -XFS_ERROR(EFAULT);
365
Christoph Hellwigd296d302009-01-19 02:02:57 +0100366 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
367 if (IS_ERR(dentry))
368 return PTR_ERR(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
Christoph Hellwigd296d302009-01-19 02:02:57 +0100370 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000371 error = -XFS_ERROR(EPERM);
372 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 }
374
375 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000376 error = -XFS_ERROR(EFAULT);
377 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 }
379
Christoph Hellwigd296d302009-01-19 02:02:57 +0100380 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000381 fsd.fsd_dmstate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000383 out:
Christoph Hellwigd296d302009-01-19 02:02:57 +0100384 dput(dentry);
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000385 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386}
387
388STATIC int
389xfs_attrlist_by_handle(
Christoph Hellwigd296d302009-01-19 02:02:57 +0100390 struct file *parfilp,
391 void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392{
Christoph Hellwigd296d302009-01-19 02:02:57 +0100393 int error = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 attrlist_cursor_kern_t *cursor;
395 xfs_fsop_attrlist_handlereq_t al_hreq;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100396 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 char *kbuf;
398
399 if (!capable(CAP_SYS_ADMIN))
400 return -XFS_ERROR(EPERM);
401 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
402 return -XFS_ERROR(EFAULT);
403 if (al_hreq.buflen > XATTR_LIST_MAX)
404 return -XFS_ERROR(EINVAL);
405
Christoph Hellwig90ad58a2008-06-27 13:32:19 +1000406 /*
407 * Reject flags, only allow namespaces.
408 */
409 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
410 return -XFS_ERROR(EINVAL);
411
Christoph Hellwigd296d302009-01-19 02:02:57 +0100412 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
413 if (IS_ERR(dentry))
414 return PTR_ERR(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415
Kulikov Vasiliy6762b932010-10-30 14:26:17 +0000416 kbuf = kzalloc(al_hreq.buflen, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 if (!kbuf)
Christoph Hellwigd296d302009-01-19 02:02:57 +0100418 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419
420 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100421 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000422 al_hreq.flags, cursor);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 if (error)
424 goto out_kfree;
425
426 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
427 error = -EFAULT;
428
429 out_kfree:
430 kfree(kbuf);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100431 out_dput:
432 dput(dentry);
433 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434}
435
sandeen@sandeen.net28750972008-11-25 21:20:15 -0600436int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437xfs_attrmulti_attr_get(
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000438 struct inode *inode,
Dave Chinnera9273ca2010-01-20 10:47:48 +1100439 unsigned char *name,
440 unsigned char __user *ubuf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 __uint32_t *len,
442 __uint32_t flags)
443{
Dave Chinnera9273ca2010-01-20 10:47:48 +1100444 unsigned char *kbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 int error = EFAULT;
Barry Naujoke8b0eba2008-04-22 17:34:31 +1000446
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 if (*len > XATTR_SIZE_MAX)
448 return EINVAL;
Dave Chinnerad650f52012-03-07 04:50:21 +0000449 kbuf = kmem_zalloc(*len, KM_SLEEP | KM_MAYFAIL);
450 if (!kbuf) {
451 kbuf = kmem_zalloc_large(*len);
452 if (!kbuf)
453 return ENOMEM;
454 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455
Barry Naujoke8b0eba2008-04-22 17:34:31 +1000456 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 if (error)
458 goto out_kfree;
459
460 if (copy_to_user(ubuf, kbuf, *len))
461 error = EFAULT;
462
463 out_kfree:
Dave Chinnerad650f52012-03-07 04:50:21 +0000464 if (is_vmalloc_addr(kbuf))
465 kmem_free_large(kbuf);
466 else
467 kmem_free(kbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 return error;
469}
470
sandeen@sandeen.net28750972008-11-25 21:20:15 -0600471int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472xfs_attrmulti_attr_set(
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000473 struct inode *inode,
Dave Chinnera9273ca2010-01-20 10:47:48 +1100474 unsigned char *name,
475 const unsigned char __user *ubuf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 __uint32_t len,
477 __uint32_t flags)
478{
Dave Chinnera9273ca2010-01-20 10:47:48 +1100479 unsigned char *kbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 int error = EFAULT;
481
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000482 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 return EPERM;
484 if (len > XATTR_SIZE_MAX)
485 return EINVAL;
486
Li Zefan0e639bd2009-04-08 15:08:04 +0800487 kbuf = memdup_user(ubuf, len);
488 if (IS_ERR(kbuf))
489 return PTR_ERR(kbuf);
Barry Naujoke8b0eba2008-04-22 17:34:31 +1000490
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000491 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 return error;
494}
495
sandeen@sandeen.net28750972008-11-25 21:20:15 -0600496int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497xfs_attrmulti_attr_remove(
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000498 struct inode *inode,
Dave Chinnera9273ca2010-01-20 10:47:48 +1100499 unsigned char *name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 __uint32_t flags)
501{
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000502 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 return EPERM;
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000504 return xfs_attr_remove(XFS_I(inode), name, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505}
506
507STATIC int
508xfs_attrmulti_by_handle(
Dave Hansen42a74f22008-02-15 14:37:46 -0800509 struct file *parfilp,
Christoph Hellwigd296d302009-01-19 02:02:57 +0100510 void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511{
512 int error;
513 xfs_attr_multiop_t *ops;
514 xfs_fsop_attrmulti_handlereq_t am_hreq;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100515 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 unsigned int i, size;
Dave Chinnera9273ca2010-01-20 10:47:48 +1100517 unsigned char *attr_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518
519 if (!capable(CAP_SYS_ADMIN))
520 return -XFS_ERROR(EPERM);
521 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
522 return -XFS_ERROR(EFAULT);
523
Zhitong Wangfda168c2010-03-23 09:51:22 +1100524 /* overflow check */
525 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
526 return -E2BIG;
527
Christoph Hellwigd296d302009-01-19 02:02:57 +0100528 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
529 if (IS_ERR(dentry))
530 return PTR_ERR(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531
532 error = E2BIG;
Christoph Hellwige182f572008-06-27 13:32:31 +1000533 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 if (!size || size > 16 * PAGE_SIZE)
Christoph Hellwigd296d302009-01-19 02:02:57 +0100535 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536
Li Zefan0e639bd2009-04-08 15:08:04 +0800537 ops = memdup_user(am_hreq.ops, size);
538 if (IS_ERR(ops)) {
539 error = PTR_ERR(ops);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100540 goto out_dput;
Li Zefan0e639bd2009-04-08 15:08:04 +0800541 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542
543 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
544 if (!attr_name)
545 goto out_kfree_ops;
546
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 error = 0;
548 for (i = 0; i < am_hreq.opcount; i++) {
Dave Chinnera9273ca2010-01-20 10:47:48 +1100549 ops[i].am_error = strncpy_from_user((char *)attr_name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 ops[i].am_attrname, MAXNAMELEN);
551 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
552 error = -ERANGE;
553 if (ops[i].am_error < 0)
554 break;
555
556 switch (ops[i].am_opcode) {
557 case ATTR_OP_GET:
Christoph Hellwigd296d302009-01-19 02:02:57 +0100558 ops[i].am_error = xfs_attrmulti_attr_get(
559 dentry->d_inode, attr_name,
560 ops[i].am_attrvalue, &ops[i].am_length,
561 ops[i].am_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 break;
563 case ATTR_OP_SET:
Al Viroa561be72011-11-23 11:57:51 -0500564 ops[i].am_error = mnt_want_write_file(parfilp);
Dave Hansen42a74f22008-02-15 14:37:46 -0800565 if (ops[i].am_error)
566 break;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100567 ops[i].am_error = xfs_attrmulti_attr_set(
568 dentry->d_inode, attr_name,
569 ops[i].am_attrvalue, ops[i].am_length,
570 ops[i].am_flags);
Al Viro2a79f172011-12-09 08:06:57 -0500571 mnt_drop_write_file(parfilp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 break;
573 case ATTR_OP_REMOVE:
Al Viroa561be72011-11-23 11:57:51 -0500574 ops[i].am_error = mnt_want_write_file(parfilp);
Dave Hansen42a74f22008-02-15 14:37:46 -0800575 if (ops[i].am_error)
576 break;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100577 ops[i].am_error = xfs_attrmulti_attr_remove(
578 dentry->d_inode, attr_name,
579 ops[i].am_flags);
Al Viro2a79f172011-12-09 08:06:57 -0500580 mnt_drop_write_file(parfilp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 break;
582 default:
583 ops[i].am_error = EINVAL;
584 }
585 }
586
587 if (copy_to_user(am_hreq.ops, ops, size))
588 error = XFS_ERROR(EFAULT);
589
590 kfree(attr_name);
591 out_kfree_ops:
592 kfree(ops);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100593 out_dput:
594 dput(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 return -error;
596}
597
sandeen@sandeen.netd5547f92008-11-25 21:20:08 -0600598int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599xfs_ioc_space(
Christoph Hellwig993386c2007-08-28 16:12:30 +1000600 struct xfs_inode *ip,
Alexey Dobriyanf37ea142006-09-28 10:52:04 +1000601 struct inode *inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 struct file *filp,
603 int ioflags,
604 unsigned int cmd,
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600605 xfs_flock64_t *bf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 int attr_flags = 0;
608 int error;
609
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600610 /*
611 * Only allow the sys admin to reserve space unless
612 * unwritten extents are enabled.
613 */
614 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
615 !capable(CAP_SYS_ADMIN))
616 return -XFS_ERROR(EPERM);
617
Alexey Dobriyanf37ea142006-09-28 10:52:04 +1000618 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 return -XFS_ERROR(EPERM);
620
Eric Sandeenad4a8ac2005-09-02 16:41:16 +1000621 if (!(filp->f_mode & FMODE_WRITE))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 return -XFS_ERROR(EBADF);
623
Alexey Dobriyanf37ea142006-09-28 10:52:04 +1000624 if (!S_ISREG(inode->i_mode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 return -XFS_ERROR(EINVAL);
626
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
Christoph Hellwig0f285c82008-07-18 17:13:28 +1000628 attr_flags |= XFS_ATTR_NONBLOCK;
Dave Chinner82878892011-03-26 09:13:08 +1100629
630 if (filp->f_flags & O_DSYNC)
631 attr_flags |= XFS_ATTR_SYNC;
632
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 if (ioflags & IO_INVIS)
Christoph Hellwig0f285c82008-07-18 17:13:28 +1000634 attr_flags |= XFS_ATTR_DMI;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600636 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 return -error;
638}
639
640STATIC int
641xfs_ioc_bulkstat(
642 xfs_mount_t *mp,
643 unsigned int cmd,
644 void __user *arg)
645{
646 xfs_fsop_bulkreq_t bulkreq;
647 int count; /* # of records returned */
648 xfs_ino_t inlast; /* last inode number */
649 int done;
650 int error;
651
652 /* done = 1 if there are more stats to get and if bulkstat */
653 /* should be called again (unused here, but used in dmapi) */
654
655 if (!capable(CAP_SYS_ADMIN))
656 return -EPERM;
657
658 if (XFS_FORCED_SHUTDOWN(mp))
659 return -XFS_ERROR(EIO);
660
661 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
662 return -XFS_ERROR(EFAULT);
663
664 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
665 return -XFS_ERROR(EFAULT);
666
667 if ((count = bulkreq.icount) <= 0)
668 return -XFS_ERROR(EINVAL);
669
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100670 if (bulkreq.ubuffer == NULL)
671 return -XFS_ERROR(EINVAL);
672
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 if (cmd == XFS_IOC_FSINUMBERS)
674 error = xfs_inumbers(mp, &inlast, &count,
Michal Marekfaa63e92007-07-11 11:10:19 +1000675 bulkreq.ubuffer, xfs_inumbers_fmt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
677 error = xfs_bulkstat_single(mp, &inlast,
678 bulkreq.ubuffer, &done);
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100679 else /* XFS_IOC_FSBULKSTAT */
Christoph Hellwig7dce11d2010-06-23 18:11:11 +1000680 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
681 sizeof(xfs_bstat_t), bulkreq.ubuffer,
682 &done);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683
684 if (error)
685 return -error;
686
687 if (bulkreq.ocount != NULL) {
688 if (copy_to_user(bulkreq.lastip, &inlast,
689 sizeof(xfs_ino_t)))
690 return -XFS_ERROR(EFAULT);
691
692 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
693 return -XFS_ERROR(EFAULT);
694 }
695
696 return 0;
697}
698
699STATIC int
700xfs_ioc_fsgeometry_v1(
701 xfs_mount_t *mp,
702 void __user *arg)
703{
Alex Eldereeb20362011-03-01 17:50:00 +0000704 xfs_fsop_geom_t fsgeo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 int error;
706
Alex Eldereeb20362011-03-01 17:50:00 +0000707 error = xfs_fs_geometry(mp, &fsgeo, 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 if (error)
709 return -error;
710
Alex Eldereeb20362011-03-01 17:50:00 +0000711 /*
712 * Caller should have passed an argument of type
713 * xfs_fsop_geom_v1_t. This is a proper subset of the
714 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
715 */
716 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 return -XFS_ERROR(EFAULT);
718 return 0;
719}
720
721STATIC int
722xfs_ioc_fsgeometry(
723 xfs_mount_t *mp,
724 void __user *arg)
725{
726 xfs_fsop_geom_t fsgeo;
727 int error;
728
729 error = xfs_fs_geometry(mp, &fsgeo, 4);
730 if (error)
731 return -error;
732
733 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
734 return -XFS_ERROR(EFAULT);
735 return 0;
736}
737
738/*
739 * Linux extended inode flags interface.
740 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741
742STATIC unsigned int
743xfs_merge_ioc_xflags(
744 unsigned int flags,
745 unsigned int start)
746{
747 unsigned int xflags = start;
748
Eric Sandeen39058a02007-02-10 18:37:10 +1100749 if (flags & FS_IMMUTABLE_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 xflags |= XFS_XFLAG_IMMUTABLE;
751 else
752 xflags &= ~XFS_XFLAG_IMMUTABLE;
Eric Sandeen39058a02007-02-10 18:37:10 +1100753 if (flags & FS_APPEND_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 xflags |= XFS_XFLAG_APPEND;
755 else
756 xflags &= ~XFS_XFLAG_APPEND;
Eric Sandeen39058a02007-02-10 18:37:10 +1100757 if (flags & FS_SYNC_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 xflags |= XFS_XFLAG_SYNC;
759 else
760 xflags &= ~XFS_XFLAG_SYNC;
Eric Sandeen39058a02007-02-10 18:37:10 +1100761 if (flags & FS_NOATIME_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762 xflags |= XFS_XFLAG_NOATIME;
763 else
764 xflags &= ~XFS_XFLAG_NOATIME;
Eric Sandeen39058a02007-02-10 18:37:10 +1100765 if (flags & FS_NODUMP_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 xflags |= XFS_XFLAG_NODUMP;
767 else
768 xflags &= ~XFS_XFLAG_NODUMP;
769
770 return xflags;
771}
772
773STATIC unsigned int
774xfs_di2lxflags(
775 __uint16_t di_flags)
776{
777 unsigned int flags = 0;
778
779 if (di_flags & XFS_DIFLAG_IMMUTABLE)
Eric Sandeen39058a02007-02-10 18:37:10 +1100780 flags |= FS_IMMUTABLE_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 if (di_flags & XFS_DIFLAG_APPEND)
Eric Sandeen39058a02007-02-10 18:37:10 +1100782 flags |= FS_APPEND_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783 if (di_flags & XFS_DIFLAG_SYNC)
Eric Sandeen39058a02007-02-10 18:37:10 +1100784 flags |= FS_SYNC_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785 if (di_flags & XFS_DIFLAG_NOATIME)
Eric Sandeen39058a02007-02-10 18:37:10 +1100786 flags |= FS_NOATIME_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 if (di_flags & XFS_DIFLAG_NODUMP)
Eric Sandeen39058a02007-02-10 18:37:10 +1100788 flags |= FS_NODUMP_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 return flags;
790}
791
792STATIC int
Christoph Hellwigc83bfab2007-10-11 17:47:00 +1000793xfs_ioc_fsgetxattr(
794 xfs_inode_t *ip,
795 int attr,
796 void __user *arg)
797{
798 struct fsxattr fa;
799
Dan Rosenberga122eb22010-09-06 18:24:57 -0400800 memset(&fa, 0, sizeof(struct fsxattr));
801
Christoph Hellwigc83bfab2007-10-11 17:47:00 +1000802 xfs_ilock(ip, XFS_ILOCK_SHARED);
803 fa.fsx_xflags = xfs_ip2xflags(ip);
804 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000805 fa.fsx_projid = xfs_get_projid(ip);
Christoph Hellwigc83bfab2007-10-11 17:47:00 +1000806
807 if (attr) {
808 if (ip->i_afp) {
809 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
810 fa.fsx_nextents = ip->i_afp->if_bytes /
811 sizeof(xfs_bmbt_rec_t);
812 else
813 fa.fsx_nextents = ip->i_d.di_anextents;
814 } else
815 fa.fsx_nextents = 0;
816 } else {
817 if (ip->i_df.if_flags & XFS_IFEXTENTS)
818 fa.fsx_nextents = ip->i_df.if_bytes /
819 sizeof(xfs_bmbt_rec_t);
820 else
821 fa.fsx_nextents = ip->i_d.di_nextents;
822 }
823 xfs_iunlock(ip, XFS_ILOCK_SHARED);
824
825 if (copy_to_user(arg, &fa, sizeof(fa)))
826 return -EFAULT;
827 return 0;
828}
829
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000830STATIC void
831xfs_set_diflags(
832 struct xfs_inode *ip,
833 unsigned int xflags)
834{
835 unsigned int di_flags;
836
837 /* can't set PREALLOC this way, just preserve it */
838 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
839 if (xflags & XFS_XFLAG_IMMUTABLE)
840 di_flags |= XFS_DIFLAG_IMMUTABLE;
841 if (xflags & XFS_XFLAG_APPEND)
842 di_flags |= XFS_DIFLAG_APPEND;
843 if (xflags & XFS_XFLAG_SYNC)
844 di_flags |= XFS_DIFLAG_SYNC;
845 if (xflags & XFS_XFLAG_NOATIME)
846 di_flags |= XFS_DIFLAG_NOATIME;
847 if (xflags & XFS_XFLAG_NODUMP)
848 di_flags |= XFS_DIFLAG_NODUMP;
849 if (xflags & XFS_XFLAG_PROJINHERIT)
850 di_flags |= XFS_DIFLAG_PROJINHERIT;
851 if (xflags & XFS_XFLAG_NODEFRAG)
852 di_flags |= XFS_DIFLAG_NODEFRAG;
853 if (xflags & XFS_XFLAG_FILESTREAM)
854 di_flags |= XFS_DIFLAG_FILESTREAM;
Al Viroabbede12011-07-26 02:31:30 -0400855 if (S_ISDIR(ip->i_d.di_mode)) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000856 if (xflags & XFS_XFLAG_RTINHERIT)
857 di_flags |= XFS_DIFLAG_RTINHERIT;
858 if (xflags & XFS_XFLAG_NOSYMLINKS)
859 di_flags |= XFS_DIFLAG_NOSYMLINKS;
860 if (xflags & XFS_XFLAG_EXTSZINHERIT)
861 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
Al Viroabbede12011-07-26 02:31:30 -0400862 } else if (S_ISREG(ip->i_d.di_mode)) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000863 if (xflags & XFS_XFLAG_REALTIME)
864 di_flags |= XFS_DIFLAG_REALTIME;
865 if (xflags & XFS_XFLAG_EXTSIZE)
866 di_flags |= XFS_DIFLAG_EXTSIZE;
867 }
868
869 ip->i_d.di_flags = di_flags;
870}
871
Christoph Hellwigf13fae22008-07-21 16:16:15 +1000872STATIC void
873xfs_diflags_to_linux(
874 struct xfs_inode *ip)
875{
David Chinnere4f75292008-08-13 16:00:45 +1000876 struct inode *inode = VFS_I(ip);
Christoph Hellwigf13fae22008-07-21 16:16:15 +1000877 unsigned int xflags = xfs_ip2xflags(ip);
878
879 if (xflags & XFS_XFLAG_IMMUTABLE)
880 inode->i_flags |= S_IMMUTABLE;
881 else
882 inode->i_flags &= ~S_IMMUTABLE;
883 if (xflags & XFS_XFLAG_APPEND)
884 inode->i_flags |= S_APPEND;
885 else
886 inode->i_flags &= ~S_APPEND;
887 if (xflags & XFS_XFLAG_SYNC)
888 inode->i_flags |= S_SYNC;
889 else
890 inode->i_flags &= ~S_SYNC;
891 if (xflags & XFS_XFLAG_NOATIME)
892 inode->i_flags |= S_NOATIME;
893 else
894 inode->i_flags &= ~S_NOATIME;
895}
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000896
897#define FSX_PROJID 1
898#define FSX_EXTSIZE 2
899#define FSX_XFLAGS 4
900#define FSX_NONBLOCK 8
901
902STATIC int
903xfs_ioctl_setattr(
904 xfs_inode_t *ip,
905 struct fsxattr *fa,
906 int mask)
907{
908 struct xfs_mount *mp = ip->i_mount;
909 struct xfs_trans *tp;
910 unsigned int lock_flags = 0;
Christoph Hellwig7d095252009-06-08 15:33:32 +0200911 struct xfs_dquot *udqp = NULL;
912 struct xfs_dquot *gdqp = NULL;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000913 struct xfs_dquot *olddquot = NULL;
914 int code;
915
Christoph Hellwigcca28fb2010-06-24 11:57:09 +1000916 trace_xfs_ioctl_setattr(ip);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000917
918 if (mp->m_flags & XFS_MOUNT_RDONLY)
919 return XFS_ERROR(EROFS);
920 if (XFS_FORCED_SHUTDOWN(mp))
921 return XFS_ERROR(EIO);
922
923 /*
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000924 * Disallow 32bit project ids when projid32bit feature is not enabled.
Arkadiusz Mi?kiewicz23963e52010-08-26 10:19:43 +0000925 */
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000926 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
927 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
Arkadiusz Mi?kiewicz23963e52010-08-26 10:19:43 +0000928 return XFS_ERROR(EINVAL);
929
930 /*
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000931 * If disk quotas is on, we make sure that the dquots do exist on disk,
932 * before we start any other transactions. Trying to do this later
933 * is messy. We don't care to take a readlock to look at the ids
934 * in inode here, because we can't hold it across the trans_reserve.
935 * If the IDs do change before we take the ilock, we're covered
936 * because the i_*dquot fields will get updated anyway.
937 */
938 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
Christoph Hellwig7d095252009-06-08 15:33:32 +0200939 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000940 ip->i_d.di_gid, fa->fsx_projid,
941 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
942 if (code)
943 return code;
944 }
945
946 /*
947 * For the other attributes, we acquire the inode lock and
948 * first do an error checking pass.
949 */
950 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
951 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
952 if (code)
953 goto error_return;
954
955 lock_flags = XFS_ILOCK_EXCL;
956 xfs_ilock(ip, lock_flags);
957
958 /*
959 * CAP_FOWNER overrides the following restrictions:
960 *
961 * The user ID of the calling process must be equal
962 * to the file owner ID, except in cases where the
963 * CAP_FSETID capability is applicable.
964 */
David Howells91b7771252008-10-31 15:50:04 +1100965 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000966 code = XFS_ERROR(EPERM);
967 goto error_return;
968 }
969
970 /*
971 * Do a quota reservation only if projid is actually going to change.
972 */
973 if (mask & FSX_PROJID) {
Christoph Hellwig7d095252009-06-08 15:33:32 +0200974 if (XFS_IS_QUOTA_RUNNING(mp) &&
975 XFS_IS_PQUOTA_ON(mp) &&
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000976 xfs_get_projid(ip) != fa->fsx_projid) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000977 ASSERT(tp);
Christoph Hellwig7d095252009-06-08 15:33:32 +0200978 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000979 capable(CAP_FOWNER) ?
980 XFS_QMOPT_FORCE_RES : 0);
981 if (code) /* out of quota */
982 goto error_return;
983 }
984 }
985
986 if (mask & FSX_EXTSIZE) {
987 /*
988 * Can't change extent size if any extents are allocated.
989 */
990 if (ip->i_d.di_nextents &&
991 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
992 fa->fsx_extsize)) {
993 code = XFS_ERROR(EINVAL); /* EFBIG? */
994 goto error_return;
995 }
996
997 /*
998 * Extent size must be a multiple of the appropriate block
Dave Chinner53158372011-01-27 12:18:18 +1100999 * size, if set at all. It must also be smaller than the
1000 * maximum extent size supported by the filesystem.
1001 *
1002 * Also, for non-realtime files, limit the extent size hint to
1003 * half the size of the AGs in the filesystem so alignment
1004 * doesn't result in extents larger than an AG.
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001005 */
1006 if (fa->fsx_extsize != 0) {
Dave Chinner53158372011-01-27 12:18:18 +11001007 xfs_extlen_t size;
1008 xfs_fsblock_t extsize_fsb;
1009
1010 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1011 if (extsize_fsb > MAXEXTLEN) {
1012 code = XFS_ERROR(EINVAL);
1013 goto error_return;
1014 }
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001015
1016 if (XFS_IS_REALTIME_INODE(ip) ||
1017 ((mask & FSX_XFLAGS) &&
1018 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1019 size = mp->m_sb.sb_rextsize <<
1020 mp->m_sb.sb_blocklog;
1021 } else {
1022 size = mp->m_sb.sb_blocksize;
Dave Chinner53158372011-01-27 12:18:18 +11001023 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1024 code = XFS_ERROR(EINVAL);
1025 goto error_return;
1026 }
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001027 }
1028
1029 if (fa->fsx_extsize % size) {
1030 code = XFS_ERROR(EINVAL);
1031 goto error_return;
1032 }
1033 }
1034 }
1035
1036
1037 if (mask & FSX_XFLAGS) {
1038 /*
1039 * Can't change realtime flag if any extents are allocated.
1040 */
1041 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1042 (XFS_IS_REALTIME_INODE(ip)) !=
1043 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1044 code = XFS_ERROR(EINVAL); /* EFBIG? */
1045 goto error_return;
1046 }
1047
1048 /*
1049 * If realtime flag is set then must have realtime data.
1050 */
1051 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1052 if ((mp->m_sb.sb_rblocks == 0) ||
1053 (mp->m_sb.sb_rextsize == 0) ||
1054 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1055 code = XFS_ERROR(EINVAL);
1056 goto error_return;
1057 }
1058 }
1059
1060 /*
1061 * Can't modify an immutable/append-only file unless
1062 * we have appropriate permission.
1063 */
1064 if ((ip->i_d.di_flags &
1065 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1066 (fa->fsx_xflags &
1067 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1068 !capable(CAP_LINUX_IMMUTABLE)) {
1069 code = XFS_ERROR(EPERM);
1070 goto error_return;
1071 }
1072 }
1073
Christoph Hellwigddc34152011-09-19 15:00:54 +00001074 xfs_trans_ijoin(tp, ip, 0);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001075
1076 /*
1077 * Change file ownership. Must be the owner or privileged.
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001078 */
1079 if (mask & FSX_PROJID) {
1080 /*
1081 * CAP_FSETID overrides the following restrictions:
1082 *
1083 * The set-user-ID and set-group-ID bits of a file will be
1084 * cleared upon successful return from chown()
1085 */
1086 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1087 !capable(CAP_FSETID))
1088 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1089
1090 /*
1091 * Change the ownerships and register quota modifications
1092 * in the transaction.
1093 */
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001094 if (xfs_get_projid(ip) != fa->fsx_projid) {
Christoph Hellwig7d095252009-06-08 15:33:32 +02001095 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1096 olddquot = xfs_qm_vop_chown(tp, ip,
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001097 &ip->i_gdquot, gdqp);
1098 }
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001099 xfs_set_projid(ip, fa->fsx_projid);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001100
1101 /*
1102 * We may have to rev the inode as well as
1103 * the superblock version number since projids didn't
1104 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1105 */
Christoph Hellwig51ce16d2008-11-28 14:23:39 +11001106 if (ip->i_d.di_version == 1)
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001107 xfs_bump_ino_vers2(tp, ip);
1108 }
1109
1110 }
1111
1112 if (mask & FSX_EXTSIZE)
1113 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
Christoph Hellwigf13fae22008-07-21 16:16:15 +10001114 if (mask & FSX_XFLAGS) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001115 xfs_set_diflags(ip, fa->fsx_xflags);
Christoph Hellwigf13fae22008-07-21 16:16:15 +10001116 xfs_diflags_to_linux(ip);
1117 }
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001118
Dave Chinnerdcd79a12010-09-28 12:27:25 +10001119 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001120 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001121
1122 XFS_STATS_INC(xs_ig_attrchg);
1123
1124 /*
1125 * If this is a synchronous mount, make sure that the
1126 * transaction goes to disk before returning to the user.
1127 * This is slightly sub-optimal in that truncates require
1128 * two sync transactions instead of one for wsync filesystems.
1129 * One for the truncate and one for the timestamps since we
1130 * don't want to change the timestamps unless we're sure the
1131 * truncate worked. Truncates are less than 1% of the laddis
1132 * mix so this probably isn't worth the trouble to optimize.
1133 */
1134 if (mp->m_flags & XFS_MOUNT_WSYNC)
1135 xfs_trans_set_sync(tp);
1136 code = xfs_trans_commit(tp, 0);
1137 xfs_iunlock(ip, lock_flags);
1138
1139 /*
1140 * Release any dquot(s) the inode had kept before chown.
1141 */
Christoph Hellwig7d095252009-06-08 15:33:32 +02001142 xfs_qm_dqrele(olddquot);
1143 xfs_qm_dqrele(udqp);
1144 xfs_qm_dqrele(gdqp);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001145
Christoph Hellwig288699f2010-06-23 18:11:15 +10001146 return code;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001147
1148 error_return:
Christoph Hellwig7d095252009-06-08 15:33:32 +02001149 xfs_qm_dqrele(udqp);
1150 xfs_qm_dqrele(gdqp);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001151 xfs_trans_cancel(tp, 0);
1152 if (lock_flags)
1153 xfs_iunlock(ip, lock_flags);
1154 return code;
1155}
1156
Christoph Hellwigc83bfab2007-10-11 17:47:00 +10001157STATIC int
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001158xfs_ioc_fssetxattr(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159 xfs_inode_t *ip,
1160 struct file *filp,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161 void __user *arg)
1162{
1163 struct fsxattr fa;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001164 unsigned int mask;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001165
1166 if (copy_from_user(&fa, arg, sizeof(fa)))
1167 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001169 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001170 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001171 mask |= FSX_NONBLOCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001173 return -xfs_ioctl_setattr(ip, &fa, mask);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001174}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001176STATIC int
1177xfs_ioc_getxflags(
1178 xfs_inode_t *ip,
1179 void __user *arg)
1180{
1181 unsigned int flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001183 flags = xfs_di2lxflags(ip->i_d.di_flags);
1184 if (copy_to_user(arg, &flags, sizeof(flags)))
1185 return -EFAULT;
1186 return 0;
1187}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001189STATIC int
1190xfs_ioc_setxflags(
1191 xfs_inode_t *ip,
1192 struct file *filp,
1193 void __user *arg)
1194{
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001195 struct fsxattr fa;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001196 unsigned int flags;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001197 unsigned int mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001199 if (copy_from_user(&flags, arg, sizeof(flags)))
1200 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001202 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1203 FS_NOATIME_FL | FS_NODUMP_FL | \
1204 FS_SYNC_FL))
1205 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001207 mask = FSX_XFLAGS;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001208 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001209 mask |= FSX_NONBLOCK;
1210 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001212 return -xfs_ioctl_setattr(ip, &fa, mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213}
1214
1215STATIC int
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001216xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1217{
1218 struct getbmap __user *base = *ap;
1219
1220 /* copy only getbmap portion (not getbmapx) */
1221 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1222 return XFS_ERROR(EFAULT);
1223
1224 *ap += sizeof(struct getbmap);
1225 return 0;
1226}
1227
1228STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229xfs_ioc_getbmap(
Christoph Hellwig993386c2007-08-28 16:12:30 +10001230 struct xfs_inode *ip,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231 int ioflags,
1232 unsigned int cmd,
1233 void __user *arg)
1234{
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001235 struct getbmapx bmx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236 int error;
1237
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001238 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 return -XFS_ERROR(EFAULT);
1240
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001241 if (bmx.bmv_count < 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242 return -XFS_ERROR(EINVAL);
1243
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001244 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245 if (ioflags & IO_INVIS)
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001246 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001248 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1249 (struct getbmap *)arg+1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250 if (error)
1251 return -error;
1252
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001253 /* copy back header - only size of getbmap */
1254 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255 return -XFS_ERROR(EFAULT);
1256 return 0;
1257}
1258
1259STATIC int
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001260xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1261{
1262 struct getbmapx __user *base = *ap;
1263
1264 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1265 return XFS_ERROR(EFAULT);
1266
1267 *ap += sizeof(struct getbmapx);
1268 return 0;
1269}
1270
1271STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272xfs_ioc_getbmapx(
Christoph Hellwig993386c2007-08-28 16:12:30 +10001273 struct xfs_inode *ip,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 void __user *arg)
1275{
1276 struct getbmapx bmx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277 int error;
1278
1279 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1280 return -XFS_ERROR(EFAULT);
1281
1282 if (bmx.bmv_count < 2)
1283 return -XFS_ERROR(EINVAL);
1284
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001285 if (bmx.bmv_iflags & (~BMV_IF_VALID))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286 return -XFS_ERROR(EINVAL);
1287
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001288 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1289 (struct getbmapx *)arg+1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290 if (error)
1291 return -error;
1292
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001293 /* copy back header */
1294 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295 return -XFS_ERROR(EFAULT);
1296
1297 return 0;
1298}
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001299
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001300/*
1301 * Note: some of the ioctl's return positive numbers as a
1302 * byte count indicating success, such as readlink_by_handle.
1303 * So we don't "sign flip" like most other routines. This means
1304 * true errors need to be returned as a negative value.
1305 */
1306long
1307xfs_file_ioctl(
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001308 struct file *filp,
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001309 unsigned int cmd,
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001310 unsigned long p)
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001311{
1312 struct inode *inode = filp->f_path.dentry->d_inode;
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001313 struct xfs_inode *ip = XFS_I(inode);
1314 struct xfs_mount *mp = ip->i_mount;
1315 void __user *arg = (void __user *)p;
1316 int ioflags = 0;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001317 int error;
1318
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001319 if (filp->f_mode & FMODE_NOCMTIME)
1320 ioflags |= IO_INVIS;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001321
Christoph Hellwigcca28fb2010-06-24 11:57:09 +10001322 trace_xfs_file_ioctl(ip);
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001323
1324 switch (cmd) {
Christoph Hellwiga46db602011-01-07 13:02:04 +00001325 case FITRIM:
1326 return xfs_ioc_trim(mp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001327 case XFS_IOC_ALLOCSP:
1328 case XFS_IOC_FREESP:
1329 case XFS_IOC_RESVSP:
1330 case XFS_IOC_UNRESVSP:
1331 case XFS_IOC_ALLOCSP64:
1332 case XFS_IOC_FREESP64:
1333 case XFS_IOC_RESVSP64:
Dave Chinner44722352010-08-24 12:02:11 +10001334 case XFS_IOC_UNRESVSP64:
1335 case XFS_IOC_ZERO_RANGE: {
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001336 xfs_flock64_t bf;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001337
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001338 if (copy_from_user(&bf, arg, sizeof(bf)))
1339 return -XFS_ERROR(EFAULT);
1340 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1341 }
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001342 case XFS_IOC_DIOINFO: {
1343 struct dioattr da;
1344 xfs_buftarg_t *target =
1345 XFS_IS_REALTIME_INODE(ip) ?
1346 mp->m_rtdev_targp : mp->m_ddev_targp;
1347
1348 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1349 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1350
1351 if (copy_to_user(arg, &da, sizeof(da)))
1352 return -XFS_ERROR(EFAULT);
1353 return 0;
1354 }
1355
1356 case XFS_IOC_FSBULKSTAT_SINGLE:
1357 case XFS_IOC_FSBULKSTAT:
1358 case XFS_IOC_FSINUMBERS:
1359 return xfs_ioc_bulkstat(mp, cmd, arg);
1360
1361 case XFS_IOC_FSGEOMETRY_V1:
1362 return xfs_ioc_fsgeometry_v1(mp, arg);
1363
1364 case XFS_IOC_FSGEOMETRY:
1365 return xfs_ioc_fsgeometry(mp, arg);
1366
1367 case XFS_IOC_GETVERSION:
1368 return put_user(inode->i_generation, (int __user *)arg);
1369
1370 case XFS_IOC_FSGETXATTR:
1371 return xfs_ioc_fsgetxattr(ip, 0, arg);
1372 case XFS_IOC_FSGETXATTRA:
1373 return xfs_ioc_fsgetxattr(ip, 1, arg);
Lachlan McIlroy3b2816b2008-04-18 12:43:35 +10001374 case XFS_IOC_FSSETXATTR:
Lachlan McIlroy65e67f52008-04-18 12:59:45 +10001375 return xfs_ioc_fssetxattr(ip, filp, arg);
1376 case XFS_IOC_GETXFLAGS:
1377 return xfs_ioc_getxflags(ip, arg);
1378 case XFS_IOC_SETXFLAGS:
1379 return xfs_ioc_setxflags(ip, filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001380
1381 case XFS_IOC_FSSETDM: {
1382 struct fsdmidata dmi;
1383
1384 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1385 return -XFS_ERROR(EFAULT);
1386
1387 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1388 dmi.fsd_dmstate);
1389 return -error;
1390 }
1391
1392 case XFS_IOC_GETBMAP:
1393 case XFS_IOC_GETBMAPA:
1394 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1395
1396 case XFS_IOC_GETBMAPX:
1397 return xfs_ioc_getbmapx(ip, arg);
1398
1399 case XFS_IOC_FD_TO_HANDLE:
1400 case XFS_IOC_PATH_TO_HANDLE:
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001401 case XFS_IOC_PATH_TO_FSHANDLE: {
1402 xfs_fsop_handlereq_t hreq;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001403
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001404 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1405 return -XFS_ERROR(EFAULT);
1406 return xfs_find_handle(cmd, &hreq);
1407 }
1408 case XFS_IOC_OPEN_BY_HANDLE: {
1409 xfs_fsop_handlereq_t hreq;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001410
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001411 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1412 return -XFS_ERROR(EFAULT);
Christoph Hellwigd296d302009-01-19 02:02:57 +01001413 return xfs_open_by_handle(filp, &hreq);
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001414 }
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001415 case XFS_IOC_FSSETDM_BY_HANDLE:
Christoph Hellwigd296d302009-01-19 02:02:57 +01001416 return xfs_fssetdm_by_handle(filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001417
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001418 case XFS_IOC_READLINK_BY_HANDLE: {
1419 xfs_fsop_handlereq_t hreq;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001420
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001421 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1422 return -XFS_ERROR(EFAULT);
Christoph Hellwigd296d302009-01-19 02:02:57 +01001423 return xfs_readlink_by_handle(filp, &hreq);
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001424 }
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001425 case XFS_IOC_ATTRLIST_BY_HANDLE:
Christoph Hellwigd296d302009-01-19 02:02:57 +01001426 return xfs_attrlist_by_handle(filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001427
1428 case XFS_IOC_ATTRMULTI_BY_HANDLE:
Christoph Hellwigd296d302009-01-19 02:02:57 +01001429 return xfs_attrmulti_by_handle(filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001430
1431 case XFS_IOC_SWAPEXT: {
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001432 struct xfs_swapext sxp;
1433
1434 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1435 return -XFS_ERROR(EFAULT);
1436 error = xfs_swapext(&sxp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001437 return -error;
1438 }
1439
1440 case XFS_IOC_FSCOUNTS: {
1441 xfs_fsop_counts_t out;
1442
1443 error = xfs_fs_counts(mp, &out);
1444 if (error)
1445 return -error;
1446
1447 if (copy_to_user(arg, &out, sizeof(out)))
1448 return -XFS_ERROR(EFAULT);
1449 return 0;
1450 }
1451
1452 case XFS_IOC_SET_RESBLKS: {
1453 xfs_fsop_resblks_t inout;
1454 __uint64_t in;
1455
1456 if (!capable(CAP_SYS_ADMIN))
1457 return -EPERM;
1458
Eric Sandeend5db0f92010-02-05 22:59:53 +00001459 if (mp->m_flags & XFS_MOUNT_RDONLY)
1460 return -XFS_ERROR(EROFS);
1461
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001462 if (copy_from_user(&inout, arg, sizeof(inout)))
1463 return -XFS_ERROR(EFAULT);
1464
1465 /* input parameter is passed in resblks field of structure */
1466 in = inout.resblks;
1467 error = xfs_reserve_blocks(mp, &in, &inout);
1468 if (error)
1469 return -error;
1470
1471 if (copy_to_user(arg, &inout, sizeof(inout)))
1472 return -XFS_ERROR(EFAULT);
1473 return 0;
1474 }
1475
1476 case XFS_IOC_GET_RESBLKS: {
1477 xfs_fsop_resblks_t out;
1478
1479 if (!capable(CAP_SYS_ADMIN))
1480 return -EPERM;
1481
1482 error = xfs_reserve_blocks(mp, NULL, &out);
1483 if (error)
1484 return -error;
1485
1486 if (copy_to_user(arg, &out, sizeof(out)))
1487 return -XFS_ERROR(EFAULT);
1488
1489 return 0;
1490 }
1491
1492 case XFS_IOC_FSGROWFSDATA: {
1493 xfs_growfs_data_t in;
1494
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001495 if (copy_from_user(&in, arg, sizeof(in)))
1496 return -XFS_ERROR(EFAULT);
1497
1498 error = xfs_growfs_data(mp, &in);
1499 return -error;
1500 }
1501
1502 case XFS_IOC_FSGROWFSLOG: {
1503 xfs_growfs_log_t in;
1504
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001505 if (copy_from_user(&in, arg, sizeof(in)))
1506 return -XFS_ERROR(EFAULT);
1507
1508 error = xfs_growfs_log(mp, &in);
1509 return -error;
1510 }
1511
1512 case XFS_IOC_FSGROWFSRT: {
1513 xfs_growfs_rt_t in;
1514
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001515 if (copy_from_user(&in, arg, sizeof(in)))
1516 return -XFS_ERROR(EFAULT);
1517
1518 error = xfs_growfs_rt(mp, &in);
1519 return -error;
1520 }
1521
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001522 case XFS_IOC_GOINGDOWN: {
1523 __uint32_t in;
1524
1525 if (!capable(CAP_SYS_ADMIN))
1526 return -EPERM;
1527
1528 if (get_user(in, (__uint32_t __user *)arg))
1529 return -XFS_ERROR(EFAULT);
1530
1531 error = xfs_fs_goingdown(mp, in);
1532 return -error;
1533 }
1534
1535 case XFS_IOC_ERROR_INJECTION: {
1536 xfs_error_injection_t in;
1537
1538 if (!capable(CAP_SYS_ADMIN))
1539 return -EPERM;
1540
1541 if (copy_from_user(&in, arg, sizeof(in)))
1542 return -XFS_ERROR(EFAULT);
1543
1544 error = xfs_errortag_add(in.errtag, mp);
1545 return -error;
1546 }
1547
1548 case XFS_IOC_ERROR_CLEARALL:
1549 if (!capable(CAP_SYS_ADMIN))
1550 return -EPERM;
1551
1552 error = xfs_errortag_clearall(mp, 1);
1553 return -error;
1554
1555 default:
1556 return -ENOTTY;
1557 }
1558}