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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"
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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212
213 if (!capable(CAP_SYS_ADMIN))
214 return -XFS_ERROR(EPERM);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
Christoph Hellwigd296d302009-01-19 02:02:57 +0100216 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
217 if (IS_ERR(dentry))
218 return PTR_ERR(dentry);
219 inode = dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220
221 /* Restrict xfs_open_by_handle to directories & regular files. */
222 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
Christoph Hellwigd296d302009-01-19 02:02:57 +0100223 error = -XFS_ERROR(EPERM);
224 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 }
226
227#if BITS_PER_LONG != 32
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600228 hreq->oflags |= O_LARGEFILE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229#endif
Christoph Hellwigd296d302009-01-19 02:02:57 +0100230
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 /* Put open permission in namei format. */
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600232 permflag = hreq->oflags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 if ((permflag+1) & O_ACCMODE)
234 permflag++;
235 if (permflag & O_TRUNC)
236 permflag |= 2;
237
238 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
239 (permflag & FMODE_WRITE) && IS_APPEND(inode)) {
Christoph Hellwigd296d302009-01-19 02:02:57 +0100240 error = -XFS_ERROR(EPERM);
241 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 }
243
244 if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
Christoph Hellwigd296d302009-01-19 02:02:57 +0100245 error = -XFS_ERROR(EACCES);
246 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 }
248
249 /* Can't write directories. */
Christoph Hellwigd296d302009-01-19 02:02:57 +0100250 if (S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) {
251 error = -XFS_ERROR(EISDIR);
252 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 }
254
Christoph Hellwigd296d302009-01-19 02:02:57 +0100255 fd = get_unused_fd();
256 if (fd < 0) {
257 error = fd;
258 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 }
260
Christoph Hellwigd296d302009-01-19 02:02:57 +0100261 filp = dentry_open(dentry, mntget(parfilp->f_path.mnt),
262 hreq->oflags, cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 if (IS_ERR(filp)) {
Christoph Hellwigd296d302009-01-19 02:02:57 +0100264 put_unused_fd(fd);
265 return PTR_ERR(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 }
Christoph Hellwig4d4be482008-12-09 04:47:33 -0500267
Al Viro03209372011-07-25 20:54:24 -0400268 if (S_ISREG(inode->i_mode)) {
Vlad Apostolov2e2e7bb2006-11-11 18:04:47 +1100269 filp->f_flags |= O_NOATIME;
Christoph Hellwig4d4be482008-12-09 04:47:33 -0500270 filp->f_mode |= FMODE_NOCMTIME;
Vlad Apostolov2e2e7bb2006-11-11 18:04:47 +1100271 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
Christoph Hellwigd296d302009-01-19 02:02:57 +0100273 fd_install(fd, filp);
274 return fd;
275
276 out_dput:
277 dput(dentry);
278 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279}
280
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000281/*
282 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
283 * unused first argument.
284 */
285STATIC int
286do_readlink(
287 char __user *buffer,
288 int buflen,
289 const char *link)
290{
291 int len;
292
293 len = PTR_ERR(link);
294 if (IS_ERR(link))
295 goto out;
296
297 len = strlen(link);
298 if (len > (unsigned) buflen)
299 len = buflen;
300 if (copy_to_user(buffer, link, len))
301 len = -EFAULT;
302 out:
303 return len;
304}
305
306
sandeen@sandeen.netd5547f92008-11-25 21:20:08 -0600307int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308xfs_readlink_by_handle(
Christoph Hellwigd296d302009-01-19 02:02:57 +0100309 struct file *parfilp,
310 xfs_fsop_handlereq_t *hreq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311{
Christoph Hellwigd296d302009-01-19 02:02:57 +0100312 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 __u32 olen;
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000314 void *link;
315 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316
317 if (!capable(CAP_SYS_ADMIN))
318 return -XFS_ERROR(EPERM);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319
Christoph Hellwigd296d302009-01-19 02:02:57 +0100320 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
321 if (IS_ERR(dentry))
322 return PTR_ERR(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323
324 /* Restrict this handle operation to symlinks only. */
Christoph Hellwigd296d302009-01-19 02:02:57 +0100325 if (!S_ISLNK(dentry->d_inode->i_mode)) {
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000326 error = -XFS_ERROR(EINVAL);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100327 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 }
329
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600330 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000331 error = -XFS_ERROR(EFAULT);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100332 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000335 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100336 if (!link) {
337 error = -XFS_ERROR(ENOMEM);
338 goto out_dput;
339 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
Christoph Hellwigd296d302009-01-19 02:02:57 +0100341 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
Nathan Scott67fcaa72006-06-09 17:00:52 +1000342 if (error)
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000343 goto out_kfree;
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600344 error = do_readlink(hreq->ohandle, olen, link);
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000345 if (error)
346 goto out_kfree;
Nathan Scott67fcaa72006-06-09 17:00:52 +1000347
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000348 out_kfree:
349 kfree(link);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100350 out_dput:
351 dput(dentry);
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000352 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353}
354
355STATIC int
356xfs_fssetdm_by_handle(
Christoph Hellwigd296d302009-01-19 02:02:57 +0100357 struct file *parfilp,
358 void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359{
360 int error;
361 struct fsdmidata fsd;
362 xfs_fsop_setdm_handlereq_t dmhreq;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100363 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364
365 if (!capable(CAP_MKNOD))
366 return -XFS_ERROR(EPERM);
367 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
368 return -XFS_ERROR(EFAULT);
369
Christoph Hellwigd296d302009-01-19 02:02:57 +0100370 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
371 if (IS_ERR(dentry))
372 return PTR_ERR(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373
Christoph Hellwigd296d302009-01-19 02:02:57 +0100374 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000375 error = -XFS_ERROR(EPERM);
376 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 }
378
379 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000380 error = -XFS_ERROR(EFAULT);
381 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 }
383
Christoph Hellwigd296d302009-01-19 02:02:57 +0100384 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000385 fsd.fsd_dmstate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000387 out:
Christoph Hellwigd296d302009-01-19 02:02:57 +0100388 dput(dentry);
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000389 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390}
391
392STATIC int
393xfs_attrlist_by_handle(
Christoph Hellwigd296d302009-01-19 02:02:57 +0100394 struct file *parfilp,
395 void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396{
Christoph Hellwigd296d302009-01-19 02:02:57 +0100397 int error = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 attrlist_cursor_kern_t *cursor;
399 xfs_fsop_attrlist_handlereq_t al_hreq;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100400 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 char *kbuf;
402
403 if (!capable(CAP_SYS_ADMIN))
404 return -XFS_ERROR(EPERM);
405 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
406 return -XFS_ERROR(EFAULT);
407 if (al_hreq.buflen > XATTR_LIST_MAX)
408 return -XFS_ERROR(EINVAL);
409
Christoph Hellwig90ad58a2008-06-27 13:32:19 +1000410 /*
411 * Reject flags, only allow namespaces.
412 */
413 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
414 return -XFS_ERROR(EINVAL);
415
Christoph Hellwigd296d302009-01-19 02:02:57 +0100416 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
417 if (IS_ERR(dentry))
418 return PTR_ERR(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419
Kulikov Vasiliy6762b932010-10-30 14:26:17 +0000420 kbuf = kzalloc(al_hreq.buflen, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 if (!kbuf)
Christoph Hellwigd296d302009-01-19 02:02:57 +0100422 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423
424 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100425 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000426 al_hreq.flags, cursor);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 if (error)
428 goto out_kfree;
429
430 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
431 error = -EFAULT;
432
433 out_kfree:
434 kfree(kbuf);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100435 out_dput:
436 dput(dentry);
437 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438}
439
sandeen@sandeen.net28750972008-11-25 21:20:15 -0600440int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441xfs_attrmulti_attr_get(
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000442 struct inode *inode,
Dave Chinnera9273ca2010-01-20 10:47:48 +1100443 unsigned char *name,
444 unsigned char __user *ubuf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 __uint32_t *len,
446 __uint32_t flags)
447{
Dave Chinnera9273ca2010-01-20 10:47:48 +1100448 unsigned char *kbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 int error = EFAULT;
Barry Naujoke8b0eba2008-04-22 17:34:31 +1000450
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 if (*len > XATTR_SIZE_MAX)
452 return EINVAL;
453 kbuf = kmalloc(*len, GFP_KERNEL);
454 if (!kbuf)
455 return ENOMEM;
456
Barry Naujoke8b0eba2008-04-22 17:34:31 +1000457 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 if (error)
459 goto out_kfree;
460
461 if (copy_to_user(ubuf, kbuf, *len))
462 error = EFAULT;
463
464 out_kfree:
465 kfree(kbuf);
466 return error;
467}
468
sandeen@sandeen.net28750972008-11-25 21:20:15 -0600469int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470xfs_attrmulti_attr_set(
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000471 struct inode *inode,
Dave Chinnera9273ca2010-01-20 10:47:48 +1100472 unsigned char *name,
473 const unsigned char __user *ubuf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 __uint32_t len,
475 __uint32_t flags)
476{
Dave Chinnera9273ca2010-01-20 10:47:48 +1100477 unsigned char *kbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 int error = EFAULT;
479
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000480 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 return EPERM;
482 if (len > XATTR_SIZE_MAX)
483 return EINVAL;
484
Li Zefan0e639bd2009-04-08 15:08:04 +0800485 kbuf = memdup_user(ubuf, len);
486 if (IS_ERR(kbuf))
487 return PTR_ERR(kbuf);
Barry Naujoke8b0eba2008-04-22 17:34:31 +1000488
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000489 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 return error;
492}
493
sandeen@sandeen.net28750972008-11-25 21:20:15 -0600494int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495xfs_attrmulti_attr_remove(
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000496 struct inode *inode,
Dave Chinnera9273ca2010-01-20 10:47:48 +1100497 unsigned char *name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 __uint32_t flags)
499{
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000500 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 return EPERM;
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000502 return xfs_attr_remove(XFS_I(inode), name, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503}
504
505STATIC int
506xfs_attrmulti_by_handle(
Dave Hansen42a74f22008-02-15 14:37:46 -0800507 struct file *parfilp,
Christoph Hellwigd296d302009-01-19 02:02:57 +0100508 void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509{
510 int error;
511 xfs_attr_multiop_t *ops;
512 xfs_fsop_attrmulti_handlereq_t am_hreq;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100513 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 unsigned int i, size;
Dave Chinnera9273ca2010-01-20 10:47:48 +1100515 unsigned char *attr_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516
517 if (!capable(CAP_SYS_ADMIN))
518 return -XFS_ERROR(EPERM);
519 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
520 return -XFS_ERROR(EFAULT);
521
Zhitong Wangfda168c2010-03-23 09:51:22 +1100522 /* overflow check */
523 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
524 return -E2BIG;
525
Christoph Hellwigd296d302009-01-19 02:02:57 +0100526 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
527 if (IS_ERR(dentry))
528 return PTR_ERR(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529
530 error = E2BIG;
Christoph Hellwige182f572008-06-27 13:32:31 +1000531 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 if (!size || size > 16 * PAGE_SIZE)
Christoph Hellwigd296d302009-01-19 02:02:57 +0100533 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534
Li Zefan0e639bd2009-04-08 15:08:04 +0800535 ops = memdup_user(am_hreq.ops, size);
536 if (IS_ERR(ops)) {
537 error = PTR_ERR(ops);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100538 goto out_dput;
Li Zefan0e639bd2009-04-08 15:08:04 +0800539 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540
541 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
542 if (!attr_name)
543 goto out_kfree_ops;
544
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 error = 0;
546 for (i = 0; i < am_hreq.opcount; i++) {
Dave Chinnera9273ca2010-01-20 10:47:48 +1100547 ops[i].am_error = strncpy_from_user((char *)attr_name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 ops[i].am_attrname, MAXNAMELEN);
549 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
550 error = -ERANGE;
551 if (ops[i].am_error < 0)
552 break;
553
554 switch (ops[i].am_opcode) {
555 case ATTR_OP_GET:
Christoph Hellwigd296d302009-01-19 02:02:57 +0100556 ops[i].am_error = xfs_attrmulti_attr_get(
557 dentry->d_inode, attr_name,
558 ops[i].am_attrvalue, &ops[i].am_length,
559 ops[i].am_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 break;
561 case ATTR_OP_SET:
Dave Hansen42a74f22008-02-15 14:37:46 -0800562 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
563 if (ops[i].am_error)
564 break;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100565 ops[i].am_error = xfs_attrmulti_attr_set(
566 dentry->d_inode, attr_name,
567 ops[i].am_attrvalue, ops[i].am_length,
568 ops[i].am_flags);
Dave Hansen42a74f22008-02-15 14:37:46 -0800569 mnt_drop_write(parfilp->f_path.mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 break;
571 case ATTR_OP_REMOVE:
Dave Hansen42a74f22008-02-15 14:37:46 -0800572 ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
573 if (ops[i].am_error)
574 break;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100575 ops[i].am_error = xfs_attrmulti_attr_remove(
576 dentry->d_inode, attr_name,
577 ops[i].am_flags);
Dave Hansen42a74f22008-02-15 14:37:46 -0800578 mnt_drop_write(parfilp->f_path.mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 break;
580 default:
581 ops[i].am_error = EINVAL;
582 }
583 }
584
585 if (copy_to_user(am_hreq.ops, ops, size))
586 error = XFS_ERROR(EFAULT);
587
588 kfree(attr_name);
589 out_kfree_ops:
590 kfree(ops);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100591 out_dput:
592 dput(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 return -error;
594}
595
sandeen@sandeen.netd5547f92008-11-25 21:20:08 -0600596int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597xfs_ioc_space(
Christoph Hellwig993386c2007-08-28 16:12:30 +1000598 struct xfs_inode *ip,
Alexey Dobriyanf37ea142006-09-28 10:52:04 +1000599 struct inode *inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 struct file *filp,
601 int ioflags,
602 unsigned int cmd,
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600603 xfs_flock64_t *bf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 int attr_flags = 0;
606 int error;
607
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600608 /*
609 * Only allow the sys admin to reserve space unless
610 * unwritten extents are enabled.
611 */
612 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
613 !capable(CAP_SYS_ADMIN))
614 return -XFS_ERROR(EPERM);
615
Alexey Dobriyanf37ea142006-09-28 10:52:04 +1000616 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 return -XFS_ERROR(EPERM);
618
Eric Sandeenad4a8ac2005-09-02 16:41:16 +1000619 if (!(filp->f_mode & FMODE_WRITE))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 return -XFS_ERROR(EBADF);
621
Alexey Dobriyanf37ea142006-09-28 10:52:04 +1000622 if (!S_ISREG(inode->i_mode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 return -XFS_ERROR(EINVAL);
624
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
Christoph Hellwig0f285c82008-07-18 17:13:28 +1000626 attr_flags |= XFS_ATTR_NONBLOCK;
Dave Chinner82878892011-03-26 09:13:08 +1100627
628 if (filp->f_flags & O_DSYNC)
629 attr_flags |= XFS_ATTR_SYNC;
630
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 if (ioflags & IO_INVIS)
Christoph Hellwig0f285c82008-07-18 17:13:28 +1000632 attr_flags |= XFS_ATTR_DMI;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600634 error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 return -error;
636}
637
638STATIC int
639xfs_ioc_bulkstat(
640 xfs_mount_t *mp,
641 unsigned int cmd,
642 void __user *arg)
643{
644 xfs_fsop_bulkreq_t bulkreq;
645 int count; /* # of records returned */
646 xfs_ino_t inlast; /* last inode number */
647 int done;
648 int error;
649
650 /* done = 1 if there are more stats to get and if bulkstat */
651 /* should be called again (unused here, but used in dmapi) */
652
653 if (!capable(CAP_SYS_ADMIN))
654 return -EPERM;
655
656 if (XFS_FORCED_SHUTDOWN(mp))
657 return -XFS_ERROR(EIO);
658
659 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
660 return -XFS_ERROR(EFAULT);
661
662 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
663 return -XFS_ERROR(EFAULT);
664
665 if ((count = bulkreq.icount) <= 0)
666 return -XFS_ERROR(EINVAL);
667
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100668 if (bulkreq.ubuffer == NULL)
669 return -XFS_ERROR(EINVAL);
670
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 if (cmd == XFS_IOC_FSINUMBERS)
672 error = xfs_inumbers(mp, &inlast, &count,
Michal Marekfaa63e92007-07-11 11:10:19 +1000673 bulkreq.ubuffer, xfs_inumbers_fmt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
675 error = xfs_bulkstat_single(mp, &inlast,
676 bulkreq.ubuffer, &done);
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100677 else /* XFS_IOC_FSBULKSTAT */
Christoph Hellwig7dce11d2010-06-23 18:11:11 +1000678 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
679 sizeof(xfs_bstat_t), bulkreq.ubuffer,
680 &done);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681
682 if (error)
683 return -error;
684
685 if (bulkreq.ocount != NULL) {
686 if (copy_to_user(bulkreq.lastip, &inlast,
687 sizeof(xfs_ino_t)))
688 return -XFS_ERROR(EFAULT);
689
690 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
691 return -XFS_ERROR(EFAULT);
692 }
693
694 return 0;
695}
696
697STATIC int
698xfs_ioc_fsgeometry_v1(
699 xfs_mount_t *mp,
700 void __user *arg)
701{
Alex Eldereeb20362011-03-01 17:50:00 +0000702 xfs_fsop_geom_t fsgeo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 int error;
704
Alex Eldereeb20362011-03-01 17:50:00 +0000705 error = xfs_fs_geometry(mp, &fsgeo, 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 if (error)
707 return -error;
708
Alex Eldereeb20362011-03-01 17:50:00 +0000709 /*
710 * Caller should have passed an argument of type
711 * xfs_fsop_geom_v1_t. This is a proper subset of the
712 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
713 */
714 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 return -XFS_ERROR(EFAULT);
716 return 0;
717}
718
719STATIC int
720xfs_ioc_fsgeometry(
721 xfs_mount_t *mp,
722 void __user *arg)
723{
724 xfs_fsop_geom_t fsgeo;
725 int error;
726
727 error = xfs_fs_geometry(mp, &fsgeo, 4);
728 if (error)
729 return -error;
730
731 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
732 return -XFS_ERROR(EFAULT);
733 return 0;
734}
735
736/*
737 * Linux extended inode flags interface.
738 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739
740STATIC unsigned int
741xfs_merge_ioc_xflags(
742 unsigned int flags,
743 unsigned int start)
744{
745 unsigned int xflags = start;
746
Eric Sandeen39058a02007-02-10 18:37:10 +1100747 if (flags & FS_IMMUTABLE_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 xflags |= XFS_XFLAG_IMMUTABLE;
749 else
750 xflags &= ~XFS_XFLAG_IMMUTABLE;
Eric Sandeen39058a02007-02-10 18:37:10 +1100751 if (flags & FS_APPEND_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 xflags |= XFS_XFLAG_APPEND;
753 else
754 xflags &= ~XFS_XFLAG_APPEND;
Eric Sandeen39058a02007-02-10 18:37:10 +1100755 if (flags & FS_SYNC_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 xflags |= XFS_XFLAG_SYNC;
757 else
758 xflags &= ~XFS_XFLAG_SYNC;
Eric Sandeen39058a02007-02-10 18:37:10 +1100759 if (flags & FS_NOATIME_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 xflags |= XFS_XFLAG_NOATIME;
761 else
762 xflags &= ~XFS_XFLAG_NOATIME;
Eric Sandeen39058a02007-02-10 18:37:10 +1100763 if (flags & FS_NODUMP_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 xflags |= XFS_XFLAG_NODUMP;
765 else
766 xflags &= ~XFS_XFLAG_NODUMP;
767
768 return xflags;
769}
770
771STATIC unsigned int
772xfs_di2lxflags(
773 __uint16_t di_flags)
774{
775 unsigned int flags = 0;
776
777 if (di_flags & XFS_DIFLAG_IMMUTABLE)
Eric Sandeen39058a02007-02-10 18:37:10 +1100778 flags |= FS_IMMUTABLE_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 if (di_flags & XFS_DIFLAG_APPEND)
Eric Sandeen39058a02007-02-10 18:37:10 +1100780 flags |= FS_APPEND_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 if (di_flags & XFS_DIFLAG_SYNC)
Eric Sandeen39058a02007-02-10 18:37:10 +1100782 flags |= FS_SYNC_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783 if (di_flags & XFS_DIFLAG_NOATIME)
Eric Sandeen39058a02007-02-10 18:37:10 +1100784 flags |= FS_NOATIME_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785 if (di_flags & XFS_DIFLAG_NODUMP)
Eric Sandeen39058a02007-02-10 18:37:10 +1100786 flags |= FS_NODUMP_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 return flags;
788}
789
790STATIC int
Christoph Hellwigc83bfab2007-10-11 17:47:00 +1000791xfs_ioc_fsgetxattr(
792 xfs_inode_t *ip,
793 int attr,
794 void __user *arg)
795{
796 struct fsxattr fa;
797
Dan Rosenberga122eb22010-09-06 18:24:57 -0400798 memset(&fa, 0, sizeof(struct fsxattr));
799
Christoph Hellwigc83bfab2007-10-11 17:47:00 +1000800 xfs_ilock(ip, XFS_ILOCK_SHARED);
801 fa.fsx_xflags = xfs_ip2xflags(ip);
802 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000803 fa.fsx_projid = xfs_get_projid(ip);
Christoph Hellwigc83bfab2007-10-11 17:47:00 +1000804
805 if (attr) {
806 if (ip->i_afp) {
807 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
808 fa.fsx_nextents = ip->i_afp->if_bytes /
809 sizeof(xfs_bmbt_rec_t);
810 else
811 fa.fsx_nextents = ip->i_d.di_anextents;
812 } else
813 fa.fsx_nextents = 0;
814 } else {
815 if (ip->i_df.if_flags & XFS_IFEXTENTS)
816 fa.fsx_nextents = ip->i_df.if_bytes /
817 sizeof(xfs_bmbt_rec_t);
818 else
819 fa.fsx_nextents = ip->i_d.di_nextents;
820 }
821 xfs_iunlock(ip, XFS_ILOCK_SHARED);
822
823 if (copy_to_user(arg, &fa, sizeof(fa)))
824 return -EFAULT;
825 return 0;
826}
827
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000828STATIC void
829xfs_set_diflags(
830 struct xfs_inode *ip,
831 unsigned int xflags)
832{
833 unsigned int di_flags;
834
835 /* can't set PREALLOC this way, just preserve it */
836 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
837 if (xflags & XFS_XFLAG_IMMUTABLE)
838 di_flags |= XFS_DIFLAG_IMMUTABLE;
839 if (xflags & XFS_XFLAG_APPEND)
840 di_flags |= XFS_DIFLAG_APPEND;
841 if (xflags & XFS_XFLAG_SYNC)
842 di_flags |= XFS_DIFLAG_SYNC;
843 if (xflags & XFS_XFLAG_NOATIME)
844 di_flags |= XFS_DIFLAG_NOATIME;
845 if (xflags & XFS_XFLAG_NODUMP)
846 di_flags |= XFS_DIFLAG_NODUMP;
847 if (xflags & XFS_XFLAG_PROJINHERIT)
848 di_flags |= XFS_DIFLAG_PROJINHERIT;
849 if (xflags & XFS_XFLAG_NODEFRAG)
850 di_flags |= XFS_DIFLAG_NODEFRAG;
851 if (xflags & XFS_XFLAG_FILESTREAM)
852 di_flags |= XFS_DIFLAG_FILESTREAM;
Al Viroabbede12011-07-26 02:31:30 -0400853 if (S_ISDIR(ip->i_d.di_mode)) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000854 if (xflags & XFS_XFLAG_RTINHERIT)
855 di_flags |= XFS_DIFLAG_RTINHERIT;
856 if (xflags & XFS_XFLAG_NOSYMLINKS)
857 di_flags |= XFS_DIFLAG_NOSYMLINKS;
858 if (xflags & XFS_XFLAG_EXTSZINHERIT)
859 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
Al Viroabbede12011-07-26 02:31:30 -0400860 } else if (S_ISREG(ip->i_d.di_mode)) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000861 if (xflags & XFS_XFLAG_REALTIME)
862 di_flags |= XFS_DIFLAG_REALTIME;
863 if (xflags & XFS_XFLAG_EXTSIZE)
864 di_flags |= XFS_DIFLAG_EXTSIZE;
865 }
866
867 ip->i_d.di_flags = di_flags;
868}
869
Christoph Hellwigf13fae22008-07-21 16:16:15 +1000870STATIC void
871xfs_diflags_to_linux(
872 struct xfs_inode *ip)
873{
David Chinnere4f75292008-08-13 16:00:45 +1000874 struct inode *inode = VFS_I(ip);
Christoph Hellwigf13fae22008-07-21 16:16:15 +1000875 unsigned int xflags = xfs_ip2xflags(ip);
876
877 if (xflags & XFS_XFLAG_IMMUTABLE)
878 inode->i_flags |= S_IMMUTABLE;
879 else
880 inode->i_flags &= ~S_IMMUTABLE;
881 if (xflags & XFS_XFLAG_APPEND)
882 inode->i_flags |= S_APPEND;
883 else
884 inode->i_flags &= ~S_APPEND;
885 if (xflags & XFS_XFLAG_SYNC)
886 inode->i_flags |= S_SYNC;
887 else
888 inode->i_flags &= ~S_SYNC;
889 if (xflags & XFS_XFLAG_NOATIME)
890 inode->i_flags |= S_NOATIME;
891 else
892 inode->i_flags &= ~S_NOATIME;
893}
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000894
895#define FSX_PROJID 1
896#define FSX_EXTSIZE 2
897#define FSX_XFLAGS 4
898#define FSX_NONBLOCK 8
899
900STATIC int
901xfs_ioctl_setattr(
902 xfs_inode_t *ip,
903 struct fsxattr *fa,
904 int mask)
905{
906 struct xfs_mount *mp = ip->i_mount;
907 struct xfs_trans *tp;
908 unsigned int lock_flags = 0;
Christoph Hellwig7d095252009-06-08 15:33:32 +0200909 struct xfs_dquot *udqp = NULL;
910 struct xfs_dquot *gdqp = NULL;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000911 struct xfs_dquot *olddquot = NULL;
912 int code;
913
Christoph Hellwigcca28fb2010-06-24 11:57:09 +1000914 trace_xfs_ioctl_setattr(ip);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000915
916 if (mp->m_flags & XFS_MOUNT_RDONLY)
917 return XFS_ERROR(EROFS);
918 if (XFS_FORCED_SHUTDOWN(mp))
919 return XFS_ERROR(EIO);
920
921 /*
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000922 * Disallow 32bit project ids when projid32bit feature is not enabled.
Arkadiusz Mi?kiewicz23963e52010-08-26 10:19:43 +0000923 */
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000924 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
925 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
Arkadiusz Mi?kiewicz23963e52010-08-26 10:19:43 +0000926 return XFS_ERROR(EINVAL);
927
928 /*
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000929 * If disk quotas is on, we make sure that the dquots do exist on disk,
930 * before we start any other transactions. Trying to do this later
931 * is messy. We don't care to take a readlock to look at the ids
932 * in inode here, because we can't hold it across the trans_reserve.
933 * If the IDs do change before we take the ilock, we're covered
934 * because the i_*dquot fields will get updated anyway.
935 */
936 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
Christoph Hellwig7d095252009-06-08 15:33:32 +0200937 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000938 ip->i_d.di_gid, fa->fsx_projid,
939 XFS_QMOPT_PQUOTA, &udqp, &gdqp);
940 if (code)
941 return code;
942 }
943
944 /*
945 * For the other attributes, we acquire the inode lock and
946 * first do an error checking pass.
947 */
948 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
949 code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
950 if (code)
951 goto error_return;
952
953 lock_flags = XFS_ILOCK_EXCL;
954 xfs_ilock(ip, lock_flags);
955
956 /*
957 * CAP_FOWNER overrides the following restrictions:
958 *
959 * The user ID of the calling process must be equal
960 * to the file owner ID, except in cases where the
961 * CAP_FSETID capability is applicable.
962 */
David Howells91b7771252008-10-31 15:50:04 +1100963 if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000964 code = XFS_ERROR(EPERM);
965 goto error_return;
966 }
967
968 /*
969 * Do a quota reservation only if projid is actually going to change.
970 */
971 if (mask & FSX_PROJID) {
Christoph Hellwig7d095252009-06-08 15:33:32 +0200972 if (XFS_IS_QUOTA_RUNNING(mp) &&
973 XFS_IS_PQUOTA_ON(mp) &&
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000974 xfs_get_projid(ip) != fa->fsx_projid) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000975 ASSERT(tp);
Christoph Hellwig7d095252009-06-08 15:33:32 +0200976 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000977 capable(CAP_FOWNER) ?
978 XFS_QMOPT_FORCE_RES : 0);
979 if (code) /* out of quota */
980 goto error_return;
981 }
982 }
983
984 if (mask & FSX_EXTSIZE) {
985 /*
986 * Can't change extent size if any extents are allocated.
987 */
988 if (ip->i_d.di_nextents &&
989 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
990 fa->fsx_extsize)) {
991 code = XFS_ERROR(EINVAL); /* EFBIG? */
992 goto error_return;
993 }
994
995 /*
996 * Extent size must be a multiple of the appropriate block
Dave Chinner53158372011-01-27 12:18:18 +1100997 * size, if set at all. It must also be smaller than the
998 * maximum extent size supported by the filesystem.
999 *
1000 * Also, for non-realtime files, limit the extent size hint to
1001 * half the size of the AGs in the filesystem so alignment
1002 * doesn't result in extents larger than an AG.
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001003 */
1004 if (fa->fsx_extsize != 0) {
Dave Chinner53158372011-01-27 12:18:18 +11001005 xfs_extlen_t size;
1006 xfs_fsblock_t extsize_fsb;
1007
1008 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1009 if (extsize_fsb > MAXEXTLEN) {
1010 code = XFS_ERROR(EINVAL);
1011 goto error_return;
1012 }
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001013
1014 if (XFS_IS_REALTIME_INODE(ip) ||
1015 ((mask & FSX_XFLAGS) &&
1016 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1017 size = mp->m_sb.sb_rextsize <<
1018 mp->m_sb.sb_blocklog;
1019 } else {
1020 size = mp->m_sb.sb_blocksize;
Dave Chinner53158372011-01-27 12:18:18 +11001021 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1022 code = XFS_ERROR(EINVAL);
1023 goto error_return;
1024 }
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001025 }
1026
1027 if (fa->fsx_extsize % size) {
1028 code = XFS_ERROR(EINVAL);
1029 goto error_return;
1030 }
1031 }
1032 }
1033
1034
1035 if (mask & FSX_XFLAGS) {
1036 /*
1037 * Can't change realtime flag if any extents are allocated.
1038 */
1039 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1040 (XFS_IS_REALTIME_INODE(ip)) !=
1041 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1042 code = XFS_ERROR(EINVAL); /* EFBIG? */
1043 goto error_return;
1044 }
1045
1046 /*
1047 * If realtime flag is set then must have realtime data.
1048 */
1049 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1050 if ((mp->m_sb.sb_rblocks == 0) ||
1051 (mp->m_sb.sb_rextsize == 0) ||
1052 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1053 code = XFS_ERROR(EINVAL);
1054 goto error_return;
1055 }
1056 }
1057
1058 /*
1059 * Can't modify an immutable/append-only file unless
1060 * we have appropriate permission.
1061 */
1062 if ((ip->i_d.di_flags &
1063 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1064 (fa->fsx_xflags &
1065 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1066 !capable(CAP_LINUX_IMMUTABLE)) {
1067 code = XFS_ERROR(EPERM);
1068 goto error_return;
1069 }
1070 }
1071
Christoph Hellwigddc34152011-09-19 15:00:54 +00001072 xfs_trans_ijoin(tp, ip, 0);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001073
1074 /*
1075 * Change file ownership. Must be the owner or privileged.
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001076 */
1077 if (mask & FSX_PROJID) {
1078 /*
1079 * CAP_FSETID overrides the following restrictions:
1080 *
1081 * The set-user-ID and set-group-ID bits of a file will be
1082 * cleared upon successful return from chown()
1083 */
1084 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
1085 !capable(CAP_FSETID))
1086 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1087
1088 /*
1089 * Change the ownerships and register quota modifications
1090 * in the transaction.
1091 */
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001092 if (xfs_get_projid(ip) != fa->fsx_projid) {
Christoph Hellwig7d095252009-06-08 15:33:32 +02001093 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1094 olddquot = xfs_qm_vop_chown(tp, ip,
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001095 &ip->i_gdquot, gdqp);
1096 }
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001097 xfs_set_projid(ip, fa->fsx_projid);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001098
1099 /*
1100 * We may have to rev the inode as well as
1101 * the superblock version number since projids didn't
1102 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1103 */
Christoph Hellwig51ce16d2008-11-28 14:23:39 +11001104 if (ip->i_d.di_version == 1)
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001105 xfs_bump_ino_vers2(tp, ip);
1106 }
1107
1108 }
1109
1110 if (mask & FSX_EXTSIZE)
1111 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
Christoph Hellwigf13fae22008-07-21 16:16:15 +10001112 if (mask & FSX_XFLAGS) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001113 xfs_set_diflags(ip, fa->fsx_xflags);
Christoph Hellwigf13fae22008-07-21 16:16:15 +10001114 xfs_diflags_to_linux(ip);
1115 }
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001116
Dave Chinnerdcd79a12010-09-28 12:27:25 +10001117 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001118 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001119
1120 XFS_STATS_INC(xs_ig_attrchg);
1121
1122 /*
1123 * If this is a synchronous mount, make sure that the
1124 * transaction goes to disk before returning to the user.
1125 * This is slightly sub-optimal in that truncates require
1126 * two sync transactions instead of one for wsync filesystems.
1127 * One for the truncate and one for the timestamps since we
1128 * don't want to change the timestamps unless we're sure the
1129 * truncate worked. Truncates are less than 1% of the laddis
1130 * mix so this probably isn't worth the trouble to optimize.
1131 */
1132 if (mp->m_flags & XFS_MOUNT_WSYNC)
1133 xfs_trans_set_sync(tp);
1134 code = xfs_trans_commit(tp, 0);
1135 xfs_iunlock(ip, lock_flags);
1136
1137 /*
1138 * Release any dquot(s) the inode had kept before chown.
1139 */
Christoph Hellwig7d095252009-06-08 15:33:32 +02001140 xfs_qm_dqrele(olddquot);
1141 xfs_qm_dqrele(udqp);
1142 xfs_qm_dqrele(gdqp);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001143
Christoph Hellwig288699f2010-06-23 18:11:15 +10001144 return code;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001145
1146 error_return:
Christoph Hellwig7d095252009-06-08 15:33:32 +02001147 xfs_qm_dqrele(udqp);
1148 xfs_qm_dqrele(gdqp);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001149 xfs_trans_cancel(tp, 0);
1150 if (lock_flags)
1151 xfs_iunlock(ip, lock_flags);
1152 return code;
1153}
1154
Christoph Hellwigc83bfab2007-10-11 17:47:00 +10001155STATIC int
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001156xfs_ioc_fssetxattr(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157 xfs_inode_t *ip,
1158 struct file *filp,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159 void __user *arg)
1160{
1161 struct fsxattr fa;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001162 unsigned int mask;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001163
1164 if (copy_from_user(&fa, arg, sizeof(fa)))
1165 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001167 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001168 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001169 mask |= FSX_NONBLOCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001171 return -xfs_ioctl_setattr(ip, &fa, mask);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001172}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001174STATIC int
1175xfs_ioc_getxflags(
1176 xfs_inode_t *ip,
1177 void __user *arg)
1178{
1179 unsigned int flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001181 flags = xfs_di2lxflags(ip->i_d.di_flags);
1182 if (copy_to_user(arg, &flags, sizeof(flags)))
1183 return -EFAULT;
1184 return 0;
1185}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001187STATIC int
1188xfs_ioc_setxflags(
1189 xfs_inode_t *ip,
1190 struct file *filp,
1191 void __user *arg)
1192{
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001193 struct fsxattr fa;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001194 unsigned int flags;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001195 unsigned int mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001197 if (copy_from_user(&flags, arg, sizeof(flags)))
1198 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001200 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1201 FS_NOATIME_FL | FS_NODUMP_FL | \
1202 FS_SYNC_FL))
1203 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001205 mask = FSX_XFLAGS;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001206 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001207 mask |= FSX_NONBLOCK;
1208 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001210 return -xfs_ioctl_setattr(ip, &fa, mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211}
1212
1213STATIC int
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001214xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1215{
1216 struct getbmap __user *base = *ap;
1217
1218 /* copy only getbmap portion (not getbmapx) */
1219 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1220 return XFS_ERROR(EFAULT);
1221
1222 *ap += sizeof(struct getbmap);
1223 return 0;
1224}
1225
1226STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227xfs_ioc_getbmap(
Christoph Hellwig993386c2007-08-28 16:12:30 +10001228 struct xfs_inode *ip,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229 int ioflags,
1230 unsigned int cmd,
1231 void __user *arg)
1232{
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001233 struct getbmapx bmx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 int error;
1235
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001236 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237 return -XFS_ERROR(EFAULT);
1238
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001239 if (bmx.bmv_count < 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 return -XFS_ERROR(EINVAL);
1241
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001242 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 if (ioflags & IO_INVIS)
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001244 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001246 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1247 (struct getbmap *)arg+1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248 if (error)
1249 return -error;
1250
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001251 /* copy back header - only size of getbmap */
1252 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253 return -XFS_ERROR(EFAULT);
1254 return 0;
1255}
1256
1257STATIC int
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001258xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1259{
1260 struct getbmapx __user *base = *ap;
1261
1262 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1263 return XFS_ERROR(EFAULT);
1264
1265 *ap += sizeof(struct getbmapx);
1266 return 0;
1267}
1268
1269STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270xfs_ioc_getbmapx(
Christoph Hellwig993386c2007-08-28 16:12:30 +10001271 struct xfs_inode *ip,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272 void __user *arg)
1273{
1274 struct getbmapx bmx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 int error;
1276
1277 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1278 return -XFS_ERROR(EFAULT);
1279
1280 if (bmx.bmv_count < 2)
1281 return -XFS_ERROR(EINVAL);
1282
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001283 if (bmx.bmv_iflags & (~BMV_IF_VALID))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284 return -XFS_ERROR(EINVAL);
1285
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001286 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1287 (struct getbmapx *)arg+1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288 if (error)
1289 return -error;
1290
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001291 /* copy back header */
1292 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293 return -XFS_ERROR(EFAULT);
1294
1295 return 0;
1296}
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001297
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001298/*
1299 * Note: some of the ioctl's return positive numbers as a
1300 * byte count indicating success, such as readlink_by_handle.
1301 * So we don't "sign flip" like most other routines. This means
1302 * true errors need to be returned as a negative value.
1303 */
1304long
1305xfs_file_ioctl(
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001306 struct file *filp,
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001307 unsigned int cmd,
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001308 unsigned long p)
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001309{
1310 struct inode *inode = filp->f_path.dentry->d_inode;
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001311 struct xfs_inode *ip = XFS_I(inode);
1312 struct xfs_mount *mp = ip->i_mount;
1313 void __user *arg = (void __user *)p;
1314 int ioflags = 0;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001315 int error;
1316
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001317 if (filp->f_mode & FMODE_NOCMTIME)
1318 ioflags |= IO_INVIS;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001319
Christoph Hellwigcca28fb2010-06-24 11:57:09 +10001320 trace_xfs_file_ioctl(ip);
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001321
1322 switch (cmd) {
Christoph Hellwiga46db602011-01-07 13:02:04 +00001323 case FITRIM:
1324 return xfs_ioc_trim(mp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001325 case XFS_IOC_ALLOCSP:
1326 case XFS_IOC_FREESP:
1327 case XFS_IOC_RESVSP:
1328 case XFS_IOC_UNRESVSP:
1329 case XFS_IOC_ALLOCSP64:
1330 case XFS_IOC_FREESP64:
1331 case XFS_IOC_RESVSP64:
Dave Chinner44722352010-08-24 12:02:11 +10001332 case XFS_IOC_UNRESVSP64:
1333 case XFS_IOC_ZERO_RANGE: {
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001334 xfs_flock64_t bf;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001335
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001336 if (copy_from_user(&bf, arg, sizeof(bf)))
1337 return -XFS_ERROR(EFAULT);
1338 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1339 }
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001340 case XFS_IOC_DIOINFO: {
1341 struct dioattr da;
1342 xfs_buftarg_t *target =
1343 XFS_IS_REALTIME_INODE(ip) ?
1344 mp->m_rtdev_targp : mp->m_ddev_targp;
1345
1346 da.d_mem = da.d_miniosz = 1 << target->bt_sshift;
1347 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1348
1349 if (copy_to_user(arg, &da, sizeof(da)))
1350 return -XFS_ERROR(EFAULT);
1351 return 0;
1352 }
1353
1354 case XFS_IOC_FSBULKSTAT_SINGLE:
1355 case XFS_IOC_FSBULKSTAT:
1356 case XFS_IOC_FSINUMBERS:
1357 return xfs_ioc_bulkstat(mp, cmd, arg);
1358
1359 case XFS_IOC_FSGEOMETRY_V1:
1360 return xfs_ioc_fsgeometry_v1(mp, arg);
1361
1362 case XFS_IOC_FSGEOMETRY:
1363 return xfs_ioc_fsgeometry(mp, arg);
1364
1365 case XFS_IOC_GETVERSION:
1366 return put_user(inode->i_generation, (int __user *)arg);
1367
1368 case XFS_IOC_FSGETXATTR:
1369 return xfs_ioc_fsgetxattr(ip, 0, arg);
1370 case XFS_IOC_FSGETXATTRA:
1371 return xfs_ioc_fsgetxattr(ip, 1, arg);
Lachlan McIlroy3b2816b2008-04-18 12:43:35 +10001372 case XFS_IOC_FSSETXATTR:
Lachlan McIlroy65e67f52008-04-18 12:59:45 +10001373 return xfs_ioc_fssetxattr(ip, filp, arg);
1374 case XFS_IOC_GETXFLAGS:
1375 return xfs_ioc_getxflags(ip, arg);
1376 case XFS_IOC_SETXFLAGS:
1377 return xfs_ioc_setxflags(ip, filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001378
1379 case XFS_IOC_FSSETDM: {
1380 struct fsdmidata dmi;
1381
1382 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1383 return -XFS_ERROR(EFAULT);
1384
1385 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1386 dmi.fsd_dmstate);
1387 return -error;
1388 }
1389
1390 case XFS_IOC_GETBMAP:
1391 case XFS_IOC_GETBMAPA:
1392 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1393
1394 case XFS_IOC_GETBMAPX:
1395 return xfs_ioc_getbmapx(ip, arg);
1396
1397 case XFS_IOC_FD_TO_HANDLE:
1398 case XFS_IOC_PATH_TO_HANDLE:
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001399 case XFS_IOC_PATH_TO_FSHANDLE: {
1400 xfs_fsop_handlereq_t hreq;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001401
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001402 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1403 return -XFS_ERROR(EFAULT);
1404 return xfs_find_handle(cmd, &hreq);
1405 }
1406 case XFS_IOC_OPEN_BY_HANDLE: {
1407 xfs_fsop_handlereq_t hreq;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001408
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001409 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1410 return -XFS_ERROR(EFAULT);
Christoph Hellwigd296d302009-01-19 02:02:57 +01001411 return xfs_open_by_handle(filp, &hreq);
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001412 }
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001413 case XFS_IOC_FSSETDM_BY_HANDLE:
Christoph Hellwigd296d302009-01-19 02:02:57 +01001414 return xfs_fssetdm_by_handle(filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001415
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001416 case XFS_IOC_READLINK_BY_HANDLE: {
1417 xfs_fsop_handlereq_t hreq;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001418
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001419 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1420 return -XFS_ERROR(EFAULT);
Christoph Hellwigd296d302009-01-19 02:02:57 +01001421 return xfs_readlink_by_handle(filp, &hreq);
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001422 }
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001423 case XFS_IOC_ATTRLIST_BY_HANDLE:
Christoph Hellwigd296d302009-01-19 02:02:57 +01001424 return xfs_attrlist_by_handle(filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001425
1426 case XFS_IOC_ATTRMULTI_BY_HANDLE:
Christoph Hellwigd296d302009-01-19 02:02:57 +01001427 return xfs_attrmulti_by_handle(filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001428
1429 case XFS_IOC_SWAPEXT: {
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001430 struct xfs_swapext sxp;
1431
1432 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1433 return -XFS_ERROR(EFAULT);
1434 error = xfs_swapext(&sxp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001435 return -error;
1436 }
1437
1438 case XFS_IOC_FSCOUNTS: {
1439 xfs_fsop_counts_t out;
1440
1441 error = xfs_fs_counts(mp, &out);
1442 if (error)
1443 return -error;
1444
1445 if (copy_to_user(arg, &out, sizeof(out)))
1446 return -XFS_ERROR(EFAULT);
1447 return 0;
1448 }
1449
1450 case XFS_IOC_SET_RESBLKS: {
1451 xfs_fsop_resblks_t inout;
1452 __uint64_t in;
1453
1454 if (!capable(CAP_SYS_ADMIN))
1455 return -EPERM;
1456
Eric Sandeend5db0f92010-02-05 22:59:53 +00001457 if (mp->m_flags & XFS_MOUNT_RDONLY)
1458 return -XFS_ERROR(EROFS);
1459
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001460 if (copy_from_user(&inout, arg, sizeof(inout)))
1461 return -XFS_ERROR(EFAULT);
1462
1463 /* input parameter is passed in resblks field of structure */
1464 in = inout.resblks;
1465 error = xfs_reserve_blocks(mp, &in, &inout);
1466 if (error)
1467 return -error;
1468
1469 if (copy_to_user(arg, &inout, sizeof(inout)))
1470 return -XFS_ERROR(EFAULT);
1471 return 0;
1472 }
1473
1474 case XFS_IOC_GET_RESBLKS: {
1475 xfs_fsop_resblks_t out;
1476
1477 if (!capable(CAP_SYS_ADMIN))
1478 return -EPERM;
1479
1480 error = xfs_reserve_blocks(mp, NULL, &out);
1481 if (error)
1482 return -error;
1483
1484 if (copy_to_user(arg, &out, sizeof(out)))
1485 return -XFS_ERROR(EFAULT);
1486
1487 return 0;
1488 }
1489
1490 case XFS_IOC_FSGROWFSDATA: {
1491 xfs_growfs_data_t in;
1492
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001493 if (copy_from_user(&in, arg, sizeof(in)))
1494 return -XFS_ERROR(EFAULT);
1495
1496 error = xfs_growfs_data(mp, &in);
1497 return -error;
1498 }
1499
1500 case XFS_IOC_FSGROWFSLOG: {
1501 xfs_growfs_log_t in;
1502
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001503 if (copy_from_user(&in, arg, sizeof(in)))
1504 return -XFS_ERROR(EFAULT);
1505
1506 error = xfs_growfs_log(mp, &in);
1507 return -error;
1508 }
1509
1510 case XFS_IOC_FSGROWFSRT: {
1511 xfs_growfs_rt_t in;
1512
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001513 if (copy_from_user(&in, arg, sizeof(in)))
1514 return -XFS_ERROR(EFAULT);
1515
1516 error = xfs_growfs_rt(mp, &in);
1517 return -error;
1518 }
1519
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001520 case XFS_IOC_GOINGDOWN: {
1521 __uint32_t in;
1522
1523 if (!capable(CAP_SYS_ADMIN))
1524 return -EPERM;
1525
1526 if (get_user(in, (__uint32_t __user *)arg))
1527 return -XFS_ERROR(EFAULT);
1528
1529 error = xfs_fs_goingdown(mp, in);
1530 return -error;
1531 }
1532
1533 case XFS_IOC_ERROR_INJECTION: {
1534 xfs_error_injection_t in;
1535
1536 if (!capable(CAP_SYS_ADMIN))
1537 return -EPERM;
1538
1539 if (copy_from_user(&in, arg, sizeof(in)))
1540 return -XFS_ERROR(EFAULT);
1541
1542 error = xfs_errortag_add(in.errtag, mp);
1543 return -error;
1544 }
1545
1546 case XFS_IOC_ERROR_CLEARALL:
1547 if (!capable(CAP_SYS_ADMIN))
1548 return -EPERM;
1549
1550 error = xfs_errortag_clearall(mp, 1);
1551 return -error;
1552
1553 default:
1554 return -ENOTTY;
1555 }
1556}