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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"
Dave Chinner70a9883c2013-10-23 10:36:05 +110020#include "xfs_shared.h"
Dave Chinner239880e2013-10-23 10:50:10 +110021#include "xfs_format.h"
22#include "xfs_log_format.h"
23#include "xfs_trans_resv.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#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_mount.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "xfs_inode.h"
Hannes Eder7bf446f2009-03-05 15:20:25 +010028#include "xfs_ioctl.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110029#include "xfs_alloc.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include "xfs_rtalloc.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include "xfs_itable.h"
Nathan Scotta844f452005-11-02 14:38:42 +110032#include "xfs_error.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include "xfs_attr.h"
Nathan Scotta844f452005-11-02 14:38:42 +110034#include "xfs_bmap.h"
Dave Chinner68988112013-08-12 20:49:42 +100035#include "xfs_bmap_util.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include "xfs_fsops.h"
Christoph Hellwiga46db602011-01-07 13:02:04 +000037#include "xfs_discard.h"
Christoph Hellwig25fe55e2008-07-18 17:13:20 +100038#include "xfs_quota.h"
Christoph Hellwigd296d302009-01-19 02:02:57 +010039#include "xfs_export.h"
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000040#include "xfs_trace.h"
Brian Foster8ca149d2012-11-07 12:21:12 -050041#include "xfs_icache.h"
Dave Chinnerc24b5df2013-08-12 20:49:45 +100042#include "xfs_symlink.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110043#include "xfs_dinode.h"
44#include "xfs_trans.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
Randy Dunlap16f7e0f2006-01-11 12:17:46 -080046#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#include <linux/dcache.h>
48#include <linux/mount.h>
49#include <linux/namei.h>
50#include <linux/pagemap.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090051#include <linux/slab.h>
Christoph Hellwigd296d302009-01-19 02:02:57 +010052#include <linux/exportfs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
54/*
55 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
56 * a file or fs handle.
57 *
58 * XFS_IOC_PATH_TO_FSHANDLE
59 * returns fs handle for a mount point or path within that mount point
60 * XFS_IOC_FD_TO_HANDLE
61 * returns full handle for a FD opened in user space
62 * XFS_IOC_PATH_TO_HANDLE
63 * returns full handle for a path
64 */
sandeen@sandeen.netd5547f92008-11-25 21:20:08 -060065int
Linus Torvalds1da177e2005-04-16 15:20:36 -070066xfs_find_handle(
67 unsigned int cmd,
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -060068 xfs_fsop_handlereq_t *hreq)
Linus Torvalds1da177e2005-04-16 15:20:36 -070069{
70 int hsize;
71 xfs_handle_t handle;
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 struct inode *inode;
Dave Chinnera30b0362013-09-02 20:49:36 +100073 struct fd f = {NULL};
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010074 struct path path;
Al Viro2903ff02012-08-28 12:52:22 -040075 int error;
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010076 struct xfs_inode *ip;
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010078 if (cmd == XFS_IOC_FD_TO_HANDLE) {
Al Viro2903ff02012-08-28 12:52:22 -040079 f = fdget(hreq->fd);
80 if (!f.file)
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010081 return -EBADF;
Al Viro496ad9a2013-01-23 17:07:38 -050082 inode = file_inode(f.file);
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010083 } else {
84 error = user_lpath((const char __user *)hreq->path, &path);
85 if (error)
86 return error;
87 inode = path.dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 }
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010089 ip = XFS_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010091 /*
92 * We can only generate handles for inodes residing on a XFS filesystem,
93 * and only for regular files, directories or symbolic links.
94 */
95 error = -EINVAL;
96 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
97 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010099 error = -EBADF;
100 if (!S_ISREG(inode->i_mode) &&
101 !S_ISDIR(inode->i_mode) &&
102 !S_ISLNK(inode->i_mode))
103 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100106 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100108 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
109 /*
110 * This handle only contains an fsid, zero the rest.
111 */
112 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
113 hsize = sizeof(xfs_fsid_t);
114 } else {
Christoph Hellwigc6143912007-09-14 15:22:37 +1000115 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
116 sizeof(handle.ha_fid.fid_len);
117 handle.ha_fid.fid_pad = 0;
118 handle.ha_fid.fid_gen = ip->i_d.di_gen;
119 handle.ha_fid.fid_ino = ip->i_ino;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
121 hsize = XFS_HSIZE(handle);
122 }
123
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100124 error = -EFAULT;
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600125 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100126 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
127 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100129 error = 0;
130
131 out_put:
132 if (cmd == XFS_IOC_FD_TO_HANDLE)
Al Viro2903ff02012-08-28 12:52:22 -0400133 fdput(f);
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100134 else
135 path_put(&path);
136 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137}
138
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139/*
Christoph Hellwigd296d302009-01-19 02:02:57 +0100140 * No need to do permission checks on the various pathname components
141 * as the handle operations are privileged.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 */
143STATIC int
Christoph Hellwigd296d302009-01-19 02:02:57 +0100144xfs_handle_acceptable(
145 void *context,
146 struct dentry *dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147{
Christoph Hellwigd296d302009-01-19 02:02:57 +0100148 return 1;
149}
150
151/*
152 * Convert userspace handle data into a dentry.
153 */
154struct dentry *
155xfs_handle_to_dentry(
156 struct file *parfilp,
157 void __user *uhandle,
158 u32 hlen)
159{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 xfs_handle_t handle;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100161 struct xfs_fid64 fid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
163 /*
164 * Only allow handle opens under a directory.
165 */
Al Viro496ad9a2013-01-23 17:07:38 -0500166 if (!S_ISDIR(file_inode(parfilp)->i_mode))
Christoph Hellwigd296d302009-01-19 02:02:57 +0100167 return ERR_PTR(-ENOTDIR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
Christoph Hellwigd296d302009-01-19 02:02:57 +0100169 if (hlen != sizeof(xfs_handle_t))
170 return ERR_PTR(-EINVAL);
171 if (copy_from_user(&handle, uhandle, hlen))
172 return ERR_PTR(-EFAULT);
173 if (handle.ha_fid.fid_len !=
174 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
175 return ERR_PTR(-EINVAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176
Christoph Hellwigd296d302009-01-19 02:02:57 +0100177 memset(&fid, 0, sizeof(struct fid));
178 fid.ino = handle.ha_fid.fid_ino;
179 fid.gen = handle.ha_fid.fid_gen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180
Christoph Hellwigd296d302009-01-19 02:02:57 +0100181 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
182 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
183 xfs_handle_acceptable, NULL);
184}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185
Christoph Hellwigd296d302009-01-19 02:02:57 +0100186STATIC struct dentry *
187xfs_handlereq_to_dentry(
188 struct file *parfilp,
189 xfs_fsop_handlereq_t *hreq)
190{
191 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192}
193
sandeen@sandeen.netd5547f92008-11-25 21:20:08 -0600194int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195xfs_open_by_handle(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 struct file *parfilp,
Christoph Hellwigd296d302009-01-19 02:02:57 +0100197 xfs_fsop_handlereq_t *hreq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198{
David Howells745ca242008-11-14 10:39:22 +1100199 const struct cred *cred = current_cred();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 int error;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100201 int fd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 int permflag;
203 struct file *filp;
204 struct inode *inode;
205 struct dentry *dentry;
Dave Chinner1a1d7722012-03-22 05:15:06 +0000206 fmode_t fmode;
Al Viro765927b2012-06-26 21:58:53 +0400207 struct path path;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
209 if (!capable(CAP_SYS_ADMIN))
210 return -XFS_ERROR(EPERM);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211
Christoph Hellwigd296d302009-01-19 02:02:57 +0100212 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
213 if (IS_ERR(dentry))
214 return PTR_ERR(dentry);
215 inode = dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216
217 /* Restrict xfs_open_by_handle to directories & regular files. */
218 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
Christoph Hellwigd296d302009-01-19 02:02:57 +0100219 error = -XFS_ERROR(EPERM);
220 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 }
222
223#if BITS_PER_LONG != 32
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600224 hreq->oflags |= O_LARGEFILE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225#endif
Christoph Hellwigd296d302009-01-19 02:02:57 +0100226
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600227 permflag = hreq->oflags;
Dave Chinner1a1d7722012-03-22 05:15:06 +0000228 fmode = OPEN_FMODE(permflag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
Dave Chinner1a1d7722012-03-22 05:15:06 +0000230 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
Christoph Hellwigd296d302009-01-19 02:02:57 +0100231 error = -XFS_ERROR(EPERM);
232 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 }
234
Dave Chinner1a1d7722012-03-22 05:15:06 +0000235 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
Christoph Hellwigd296d302009-01-19 02:02:57 +0100236 error = -XFS_ERROR(EACCES);
237 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 }
239
240 /* Can't write directories. */
Dave Chinner1a1d7722012-03-22 05:15:06 +0000241 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
Christoph Hellwigd296d302009-01-19 02:02:57 +0100242 error = -XFS_ERROR(EISDIR);
243 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 }
245
Yann Droneaud862a6292013-07-02 18:39:34 +0200246 fd = get_unused_fd_flags(0);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100247 if (fd < 0) {
248 error = fd;
249 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 }
251
Al Viro765927b2012-06-26 21:58:53 +0400252 path.mnt = parfilp->f_path.mnt;
253 path.dentry = dentry;
254 filp = dentry_open(&path, hreq->oflags, cred);
255 dput(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 if (IS_ERR(filp)) {
Christoph Hellwigd296d302009-01-19 02:02:57 +0100257 put_unused_fd(fd);
258 return PTR_ERR(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 }
Christoph Hellwig4d4be482008-12-09 04:47:33 -0500260
Al Viro03209372011-07-25 20:54:24 -0400261 if (S_ISREG(inode->i_mode)) {
Vlad Apostolov2e2e7bb2006-11-11 18:04:47 +1100262 filp->f_flags |= O_NOATIME;
Christoph Hellwig4d4be482008-12-09 04:47:33 -0500263 filp->f_mode |= FMODE_NOCMTIME;
Vlad Apostolov2e2e7bb2006-11-11 18:04:47 +1100264 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265
Christoph Hellwigd296d302009-01-19 02:02:57 +0100266 fd_install(fd, filp);
267 return fd;
268
269 out_dput:
270 dput(dentry);
271 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272}
273
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000274/*
275 * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's
276 * unused first argument.
277 */
278STATIC int
279do_readlink(
280 char __user *buffer,
281 int buflen,
282 const char *link)
283{
284 int len;
285
286 len = PTR_ERR(link);
287 if (IS_ERR(link))
288 goto out;
289
290 len = strlen(link);
291 if (len > (unsigned) buflen)
292 len = buflen;
293 if (copy_to_user(buffer, link, len))
294 len = -EFAULT;
295 out:
296 return len;
297}
298
299
sandeen@sandeen.netd5547f92008-11-25 21:20:08 -0600300int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301xfs_readlink_by_handle(
Christoph Hellwigd296d302009-01-19 02:02:57 +0100302 struct file *parfilp,
303 xfs_fsop_handlereq_t *hreq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304{
Christoph Hellwigd296d302009-01-19 02:02:57 +0100305 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 __u32 olen;
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000307 void *link;
308 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309
310 if (!capable(CAP_SYS_ADMIN))
311 return -XFS_ERROR(EPERM);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
Christoph Hellwigd296d302009-01-19 02:02:57 +0100313 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
314 if (IS_ERR(dentry))
315 return PTR_ERR(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316
317 /* Restrict this handle operation to symlinks only. */
Christoph Hellwigd296d302009-01-19 02:02:57 +0100318 if (!S_ISLNK(dentry->d_inode->i_mode)) {
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000319 error = -XFS_ERROR(EINVAL);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100320 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 }
322
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600323 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000324 error = -XFS_ERROR(EFAULT);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100325 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000328 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100329 if (!link) {
330 error = -XFS_ERROR(ENOMEM);
331 goto out_dput;
332 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333
Christoph Hellwigd296d302009-01-19 02:02:57 +0100334 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
Nathan Scott67fcaa72006-06-09 17:00:52 +1000335 if (error)
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000336 goto out_kfree;
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600337 error = do_readlink(hreq->ohandle, olen, link);
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000338 if (error)
339 goto out_kfree;
Nathan Scott67fcaa72006-06-09 17:00:52 +1000340
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000341 out_kfree:
342 kfree(link);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100343 out_dput:
344 dput(dentry);
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000345 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346}
347
Dave Chinnerc24b5df2013-08-12 20:49:45 +1000348int
349xfs_set_dmattrs(
350 xfs_inode_t *ip,
351 u_int evmask,
352 u_int16_t state)
353{
354 xfs_mount_t *mp = ip->i_mount;
355 xfs_trans_t *tp;
356 int error;
357
358 if (!capable(CAP_SYS_ADMIN))
359 return XFS_ERROR(EPERM);
360
361 if (XFS_FORCED_SHUTDOWN(mp))
362 return XFS_ERROR(EIO);
363
364 tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS);
Jie Liu3d3c8b52013-08-12 20:49:59 +1000365 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
Dave Chinnerc24b5df2013-08-12 20:49:45 +1000366 if (error) {
367 xfs_trans_cancel(tp, 0);
368 return error;
369 }
370 xfs_ilock(ip, XFS_ILOCK_EXCL);
371 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
372
373 ip->i_d.di_dmevmask = evmask;
374 ip->i_d.di_dmstate = state;
375
376 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
377 error = xfs_trans_commit(tp, 0);
378
379 return error;
380}
381
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382STATIC int
383xfs_fssetdm_by_handle(
Christoph Hellwigd296d302009-01-19 02:02:57 +0100384 struct file *parfilp,
385 void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386{
387 int error;
388 struct fsdmidata fsd;
389 xfs_fsop_setdm_handlereq_t dmhreq;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100390 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391
392 if (!capable(CAP_MKNOD))
393 return -XFS_ERROR(EPERM);
394 if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t)))
395 return -XFS_ERROR(EFAULT);
396
Jan Karad9457dc2012-06-12 16:20:39 +0200397 error = mnt_want_write_file(parfilp);
398 if (error)
399 return error;
400
Christoph Hellwigd296d302009-01-19 02:02:57 +0100401 dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq);
Jan Karad9457dc2012-06-12 16:20:39 +0200402 if (IS_ERR(dentry)) {
403 mnt_drop_write_file(parfilp);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100404 return PTR_ERR(dentry);
Jan Karad9457dc2012-06-12 16:20:39 +0200405 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
Christoph Hellwigd296d302009-01-19 02:02:57 +0100407 if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000408 error = -XFS_ERROR(EPERM);
409 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 }
411
412 if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) {
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000413 error = -XFS_ERROR(EFAULT);
414 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 }
416
Christoph Hellwigd296d302009-01-19 02:02:57 +0100417 error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000418 fsd.fsd_dmstate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000420 out:
Jan Karad9457dc2012-06-12 16:20:39 +0200421 mnt_drop_write_file(parfilp);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100422 dput(dentry);
Christoph Hellwig6e7f75e2007-10-11 18:09:50 +1000423 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424}
425
426STATIC int
427xfs_attrlist_by_handle(
Christoph Hellwigd296d302009-01-19 02:02:57 +0100428 struct file *parfilp,
429 void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430{
Christoph Hellwigd296d302009-01-19 02:02:57 +0100431 int error = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 attrlist_cursor_kern_t *cursor;
433 xfs_fsop_attrlist_handlereq_t al_hreq;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100434 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 char *kbuf;
436
437 if (!capable(CAP_SYS_ADMIN))
438 return -XFS_ERROR(EPERM);
439 if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t)))
440 return -XFS_ERROR(EFAULT);
Dan Carpenter071c5292013-10-31 21:00:10 +0300441 if (al_hreq.buflen < sizeof(struct attrlist) ||
442 al_hreq.buflen > XATTR_LIST_MAX)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 return -XFS_ERROR(EINVAL);
444
Christoph Hellwig90ad58a2008-06-27 13:32:19 +1000445 /*
446 * Reject flags, only allow namespaces.
447 */
448 if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
449 return -XFS_ERROR(EINVAL);
450
Christoph Hellwigd296d302009-01-19 02:02:57 +0100451 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
452 if (IS_ERR(dentry))
453 return PTR_ERR(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454
Dave Chinnerfdd3cce2013-09-02 20:53:00 +1000455 kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
456 if (!kbuf)
457 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458
459 cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100460 error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000461 al_hreq.flags, cursor);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 if (error)
463 goto out_kfree;
464
465 if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen))
466 error = -EFAULT;
467
Dave Chinnerfdd3cce2013-09-02 20:53:00 +1000468out_kfree:
469 kmem_free(kbuf);
470out_dput:
Christoph Hellwigd296d302009-01-19 02:02:57 +0100471 dput(dentry);
472 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473}
474
sandeen@sandeen.net28750972008-11-25 21:20:15 -0600475int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476xfs_attrmulti_attr_get(
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000477 struct inode *inode,
Dave Chinnera9273ca2010-01-20 10:47:48 +1100478 unsigned char *name,
479 unsigned char __user *ubuf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 __uint32_t *len,
481 __uint32_t flags)
482{
Dave Chinnera9273ca2010-01-20 10:47:48 +1100483 unsigned char *kbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 int error = EFAULT;
Barry Naujoke8b0eba2008-04-22 17:34:31 +1000485
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 if (*len > XATTR_SIZE_MAX)
487 return EINVAL;
Dave Chinnerfdd3cce2013-09-02 20:53:00 +1000488 kbuf = kmem_zalloc_large(*len, KM_SLEEP);
489 if (!kbuf)
490 return ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491
Barry Naujoke8b0eba2008-04-22 17:34:31 +1000492 error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 if (error)
494 goto out_kfree;
495
496 if (copy_to_user(ubuf, kbuf, *len))
497 error = EFAULT;
498
Dave Chinnerfdd3cce2013-09-02 20:53:00 +1000499out_kfree:
500 kmem_free(kbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 return error;
502}
503
sandeen@sandeen.net28750972008-11-25 21:20:15 -0600504int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505xfs_attrmulti_attr_set(
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000506 struct inode *inode,
Dave Chinnera9273ca2010-01-20 10:47:48 +1100507 unsigned char *name,
508 const unsigned char __user *ubuf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 __uint32_t len,
510 __uint32_t flags)
511{
Dave Chinnera9273ca2010-01-20 10:47:48 +1100512 unsigned char *kbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 int error = EFAULT;
514
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000515 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 return EPERM;
517 if (len > XATTR_SIZE_MAX)
518 return EINVAL;
519
Li Zefan0e639bd2009-04-08 15:08:04 +0800520 kbuf = memdup_user(ubuf, len);
521 if (IS_ERR(kbuf))
522 return PTR_ERR(kbuf);
Barry Naujoke8b0eba2008-04-22 17:34:31 +1000523
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000524 error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 return error;
527}
528
sandeen@sandeen.net28750972008-11-25 21:20:15 -0600529int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530xfs_attrmulti_attr_remove(
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000531 struct inode *inode,
Dave Chinnera9273ca2010-01-20 10:47:48 +1100532 unsigned char *name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 __uint32_t flags)
534{
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000535 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 return EPERM;
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000537 return xfs_attr_remove(XFS_I(inode), name, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538}
539
540STATIC int
541xfs_attrmulti_by_handle(
Dave Hansen42a74f22008-02-15 14:37:46 -0800542 struct file *parfilp,
Christoph Hellwigd296d302009-01-19 02:02:57 +0100543 void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544{
545 int error;
546 xfs_attr_multiop_t *ops;
547 xfs_fsop_attrmulti_handlereq_t am_hreq;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100548 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 unsigned int i, size;
Dave Chinnera9273ca2010-01-20 10:47:48 +1100550 unsigned char *attr_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551
552 if (!capable(CAP_SYS_ADMIN))
553 return -XFS_ERROR(EPERM);
554 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
555 return -XFS_ERROR(EFAULT);
556
Zhitong Wangfda168c2010-03-23 09:51:22 +1100557 /* overflow check */
558 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
559 return -E2BIG;
560
Christoph Hellwigd296d302009-01-19 02:02:57 +0100561 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
562 if (IS_ERR(dentry))
563 return PTR_ERR(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564
565 error = E2BIG;
Christoph Hellwige182f572008-06-27 13:32:31 +1000566 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 if (!size || size > 16 * PAGE_SIZE)
Christoph Hellwigd296d302009-01-19 02:02:57 +0100568 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569
Li Zefan0e639bd2009-04-08 15:08:04 +0800570 ops = memdup_user(am_hreq.ops, size);
571 if (IS_ERR(ops)) {
572 error = PTR_ERR(ops);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100573 goto out_dput;
Li Zefan0e639bd2009-04-08 15:08:04 +0800574 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575
576 attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
577 if (!attr_name)
578 goto out_kfree_ops;
579
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 error = 0;
581 for (i = 0; i < am_hreq.opcount; i++) {
Dave Chinnera9273ca2010-01-20 10:47:48 +1100582 ops[i].am_error = strncpy_from_user((char *)attr_name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 ops[i].am_attrname, MAXNAMELEN);
584 if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
585 error = -ERANGE;
586 if (ops[i].am_error < 0)
587 break;
588
589 switch (ops[i].am_opcode) {
590 case ATTR_OP_GET:
Christoph Hellwigd296d302009-01-19 02:02:57 +0100591 ops[i].am_error = xfs_attrmulti_attr_get(
592 dentry->d_inode, attr_name,
593 ops[i].am_attrvalue, &ops[i].am_length,
594 ops[i].am_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 break;
596 case ATTR_OP_SET:
Al Viroa561be72011-11-23 11:57:51 -0500597 ops[i].am_error = mnt_want_write_file(parfilp);
Dave Hansen42a74f22008-02-15 14:37:46 -0800598 if (ops[i].am_error)
599 break;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100600 ops[i].am_error = xfs_attrmulti_attr_set(
601 dentry->d_inode, attr_name,
602 ops[i].am_attrvalue, ops[i].am_length,
603 ops[i].am_flags);
Al Viro2a79f172011-12-09 08:06:57 -0500604 mnt_drop_write_file(parfilp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 break;
606 case ATTR_OP_REMOVE:
Al Viroa561be72011-11-23 11:57:51 -0500607 ops[i].am_error = mnt_want_write_file(parfilp);
Dave Hansen42a74f22008-02-15 14:37:46 -0800608 if (ops[i].am_error)
609 break;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100610 ops[i].am_error = xfs_attrmulti_attr_remove(
611 dentry->d_inode, attr_name,
612 ops[i].am_flags);
Al Viro2a79f172011-12-09 08:06:57 -0500613 mnt_drop_write_file(parfilp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 break;
615 default:
616 ops[i].am_error = EINVAL;
617 }
618 }
619
620 if (copy_to_user(am_hreq.ops, ops, size))
621 error = XFS_ERROR(EFAULT);
622
623 kfree(attr_name);
624 out_kfree_ops:
625 kfree(ops);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100626 out_dput:
627 dput(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 return -error;
629}
630
sandeen@sandeen.netd5547f92008-11-25 21:20:08 -0600631int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632xfs_ioc_space(
Christoph Hellwig993386c2007-08-28 16:12:30 +1000633 struct xfs_inode *ip,
Alexey Dobriyanf37ea142006-09-28 10:52:04 +1000634 struct inode *inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 struct file *filp,
636 int ioflags,
637 unsigned int cmd,
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600638 xfs_flock64_t *bf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639{
Christoph Hellwig865e9442013-10-12 00:55:08 -0700640 struct xfs_mount *mp = ip->i_mount;
641 struct xfs_trans *tp;
642 struct iattr iattr;
643 bool setprealloc = false;
644 bool clrprealloc = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 int error;
646
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600647 /*
648 * Only allow the sys admin to reserve space unless
649 * unwritten extents are enabled.
650 */
651 if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) &&
652 !capable(CAP_SYS_ADMIN))
653 return -XFS_ERROR(EPERM);
654
Alexey Dobriyanf37ea142006-09-28 10:52:04 +1000655 if (inode->i_flags & (S_IMMUTABLE|S_APPEND))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 return -XFS_ERROR(EPERM);
657
Eric Sandeenad4a8ac2005-09-02 16:41:16 +1000658 if (!(filp->f_mode & FMODE_WRITE))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 return -XFS_ERROR(EBADF);
660
Alexey Dobriyanf37ea142006-09-28 10:52:04 +1000661 if (!S_ISREG(inode->i_mode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 return -XFS_ERROR(EINVAL);
663
Jan Karad9457dc2012-06-12 16:20:39 +0200664 error = mnt_want_write_file(filp);
665 if (error)
666 return error;
Christoph Hellwig865e9442013-10-12 00:55:08 -0700667
Christoph Hellwig5f8aca82013-10-12 00:55:06 -0700668 xfs_ilock(ip, XFS_IOLOCK_EXCL);
Christoph Hellwig865e9442013-10-12 00:55:08 -0700669
670 switch (bf->l_whence) {
671 case 0: /*SEEK_SET*/
672 break;
673 case 1: /*SEEK_CUR*/
674 bf->l_start += filp->f_pos;
675 break;
676 case 2: /*SEEK_END*/
677 bf->l_start += XFS_ISIZE(ip);
678 break;
679 default:
680 error = XFS_ERROR(EINVAL);
681 goto out_unlock;
682 }
683
684 /*
685 * length of <= 0 for resv/unresv/zero is invalid. length for
686 * alloc/free is ignored completely and we have no idea what userspace
687 * might have set it to, so set it to zero to allow range
688 * checks to pass.
689 */
690 switch (cmd) {
691 case XFS_IOC_ZERO_RANGE:
692 case XFS_IOC_RESVSP:
693 case XFS_IOC_RESVSP64:
694 case XFS_IOC_UNRESVSP:
695 case XFS_IOC_UNRESVSP64:
696 if (bf->l_len <= 0) {
697 error = XFS_ERROR(EINVAL);
698 goto out_unlock;
699 }
700 break;
701 default:
702 bf->l_len = 0;
703 break;
704 }
705
706 if (bf->l_start < 0 ||
707 bf->l_start > mp->m_super->s_maxbytes ||
708 bf->l_start + bf->l_len < 0 ||
709 bf->l_start + bf->l_len >= mp->m_super->s_maxbytes) {
710 error = XFS_ERROR(EINVAL);
711 goto out_unlock;
712 }
713
714 switch (cmd) {
715 case XFS_IOC_ZERO_RANGE:
716 error = xfs_zero_file_space(ip, bf->l_start, bf->l_len);
717 if (!error)
718 setprealloc = true;
719 break;
720 case XFS_IOC_RESVSP:
721 case XFS_IOC_RESVSP64:
722 error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len,
723 XFS_BMAPI_PREALLOC);
724 if (!error)
725 setprealloc = true;
726 break;
727 case XFS_IOC_UNRESVSP:
728 case XFS_IOC_UNRESVSP64:
729 error = xfs_free_file_space(ip, bf->l_start, bf->l_len);
730 break;
731 case XFS_IOC_ALLOCSP:
732 case XFS_IOC_ALLOCSP64:
733 case XFS_IOC_FREESP:
734 case XFS_IOC_FREESP64:
735 if (bf->l_start > XFS_ISIZE(ip)) {
736 error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
737 bf->l_start - XFS_ISIZE(ip), 0);
738 if (error)
739 goto out_unlock;
740 }
741
742 iattr.ia_valid = ATTR_SIZE;
743 iattr.ia_size = bf->l_start;
744
745 error = xfs_setattr_size(ip, &iattr);
746 if (!error)
747 clrprealloc = true;
748 break;
749 default:
750 ASSERT(0);
751 error = XFS_ERROR(EINVAL);
752 }
753
754 if (error)
755 goto out_unlock;
756
757 tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID);
758 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_writeid, 0, 0);
759 if (error) {
760 xfs_trans_cancel(tp, 0);
761 goto out_unlock;
762 }
763
764 xfs_ilock(ip, XFS_ILOCK_EXCL);
765 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
766
767 if (!(ioflags & IO_INVIS)) {
768 ip->i_d.di_mode &= ~S_ISUID;
769 if (ip->i_d.di_mode & S_IXGRP)
770 ip->i_d.di_mode &= ~S_ISGID;
771 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
772 }
773
774 if (setprealloc)
775 ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC;
776 else if (clrprealloc)
777 ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC;
778
779 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
780 if (filp->f_flags & O_DSYNC)
781 xfs_trans_set_sync(tp);
782 error = xfs_trans_commit(tp, 0);
783
784out_unlock:
Christoph Hellwig5f8aca82013-10-12 00:55:06 -0700785 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
Jan Karad9457dc2012-06-12 16:20:39 +0200786 mnt_drop_write_file(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 return -error;
788}
789
790STATIC int
791xfs_ioc_bulkstat(
792 xfs_mount_t *mp,
793 unsigned int cmd,
794 void __user *arg)
795{
796 xfs_fsop_bulkreq_t bulkreq;
797 int count; /* # of records returned */
798 xfs_ino_t inlast; /* last inode number */
799 int done;
800 int error;
801
802 /* done = 1 if there are more stats to get and if bulkstat */
803 /* should be called again (unused here, but used in dmapi) */
804
805 if (!capable(CAP_SYS_ADMIN))
806 return -EPERM;
807
808 if (XFS_FORCED_SHUTDOWN(mp))
809 return -XFS_ERROR(EIO);
810
811 if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
812 return -XFS_ERROR(EFAULT);
813
814 if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
815 return -XFS_ERROR(EFAULT);
816
817 if ((count = bulkreq.icount) <= 0)
818 return -XFS_ERROR(EINVAL);
819
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100820 if (bulkreq.ubuffer == NULL)
821 return -XFS_ERROR(EINVAL);
822
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 if (cmd == XFS_IOC_FSINUMBERS)
824 error = xfs_inumbers(mp, &inlast, &count,
Michal Marekfaa63e92007-07-11 11:10:19 +1000825 bulkreq.ubuffer, xfs_inumbers_fmt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
827 error = xfs_bulkstat_single(mp, &inlast,
828 bulkreq.ubuffer, &done);
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100829 else /* XFS_IOC_FSBULKSTAT */
Christoph Hellwig7dce11d2010-06-23 18:11:11 +1000830 error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
831 sizeof(xfs_bstat_t), bulkreq.ubuffer,
832 &done);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833
834 if (error)
835 return -error;
836
837 if (bulkreq.ocount != NULL) {
838 if (copy_to_user(bulkreq.lastip, &inlast,
839 sizeof(xfs_ino_t)))
840 return -XFS_ERROR(EFAULT);
841
842 if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
843 return -XFS_ERROR(EFAULT);
844 }
845
846 return 0;
847}
848
849STATIC int
850xfs_ioc_fsgeometry_v1(
851 xfs_mount_t *mp,
852 void __user *arg)
853{
Alex Eldereeb20362011-03-01 17:50:00 +0000854 xfs_fsop_geom_t fsgeo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855 int error;
856
Alex Eldereeb20362011-03-01 17:50:00 +0000857 error = xfs_fs_geometry(mp, &fsgeo, 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858 if (error)
859 return -error;
860
Alex Eldereeb20362011-03-01 17:50:00 +0000861 /*
862 * Caller should have passed an argument of type
863 * xfs_fsop_geom_v1_t. This is a proper subset of the
864 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
865 */
866 if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 return -XFS_ERROR(EFAULT);
868 return 0;
869}
870
871STATIC int
872xfs_ioc_fsgeometry(
873 xfs_mount_t *mp,
874 void __user *arg)
875{
876 xfs_fsop_geom_t fsgeo;
877 int error;
878
879 error = xfs_fs_geometry(mp, &fsgeo, 4);
880 if (error)
881 return -error;
882
883 if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
884 return -XFS_ERROR(EFAULT);
885 return 0;
886}
887
888/*
889 * Linux extended inode flags interface.
890 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891
892STATIC unsigned int
893xfs_merge_ioc_xflags(
894 unsigned int flags,
895 unsigned int start)
896{
897 unsigned int xflags = start;
898
Eric Sandeen39058a02007-02-10 18:37:10 +1100899 if (flags & FS_IMMUTABLE_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 xflags |= XFS_XFLAG_IMMUTABLE;
901 else
902 xflags &= ~XFS_XFLAG_IMMUTABLE;
Eric Sandeen39058a02007-02-10 18:37:10 +1100903 if (flags & FS_APPEND_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904 xflags |= XFS_XFLAG_APPEND;
905 else
906 xflags &= ~XFS_XFLAG_APPEND;
Eric Sandeen39058a02007-02-10 18:37:10 +1100907 if (flags & FS_SYNC_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 xflags |= XFS_XFLAG_SYNC;
909 else
910 xflags &= ~XFS_XFLAG_SYNC;
Eric Sandeen39058a02007-02-10 18:37:10 +1100911 if (flags & FS_NOATIME_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912 xflags |= XFS_XFLAG_NOATIME;
913 else
914 xflags &= ~XFS_XFLAG_NOATIME;
Eric Sandeen39058a02007-02-10 18:37:10 +1100915 if (flags & FS_NODUMP_FL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916 xflags |= XFS_XFLAG_NODUMP;
917 else
918 xflags &= ~XFS_XFLAG_NODUMP;
919
920 return xflags;
921}
922
923STATIC unsigned int
924xfs_di2lxflags(
925 __uint16_t di_flags)
926{
927 unsigned int flags = 0;
928
929 if (di_flags & XFS_DIFLAG_IMMUTABLE)
Eric Sandeen39058a02007-02-10 18:37:10 +1100930 flags |= FS_IMMUTABLE_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 if (di_flags & XFS_DIFLAG_APPEND)
Eric Sandeen39058a02007-02-10 18:37:10 +1100932 flags |= FS_APPEND_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933 if (di_flags & XFS_DIFLAG_SYNC)
Eric Sandeen39058a02007-02-10 18:37:10 +1100934 flags |= FS_SYNC_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935 if (di_flags & XFS_DIFLAG_NOATIME)
Eric Sandeen39058a02007-02-10 18:37:10 +1100936 flags |= FS_NOATIME_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 if (di_flags & XFS_DIFLAG_NODUMP)
Eric Sandeen39058a02007-02-10 18:37:10 +1100938 flags |= FS_NODUMP_FL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 return flags;
940}
941
942STATIC int
Christoph Hellwigc83bfab2007-10-11 17:47:00 +1000943xfs_ioc_fsgetxattr(
944 xfs_inode_t *ip,
945 int attr,
946 void __user *arg)
947{
948 struct fsxattr fa;
949
Dan Rosenberga122eb22010-09-06 18:24:57 -0400950 memset(&fa, 0, sizeof(struct fsxattr));
951
Christoph Hellwigc83bfab2007-10-11 17:47:00 +1000952 xfs_ilock(ip, XFS_ILOCK_SHARED);
953 fa.fsx_xflags = xfs_ip2xflags(ip);
954 fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000955 fa.fsx_projid = xfs_get_projid(ip);
Christoph Hellwigc83bfab2007-10-11 17:47:00 +1000956
957 if (attr) {
958 if (ip->i_afp) {
959 if (ip->i_afp->if_flags & XFS_IFEXTENTS)
960 fa.fsx_nextents = ip->i_afp->if_bytes /
961 sizeof(xfs_bmbt_rec_t);
962 else
963 fa.fsx_nextents = ip->i_d.di_anextents;
964 } else
965 fa.fsx_nextents = 0;
966 } else {
967 if (ip->i_df.if_flags & XFS_IFEXTENTS)
968 fa.fsx_nextents = ip->i_df.if_bytes /
969 sizeof(xfs_bmbt_rec_t);
970 else
971 fa.fsx_nextents = ip->i_d.di_nextents;
972 }
973 xfs_iunlock(ip, XFS_ILOCK_SHARED);
974
975 if (copy_to_user(arg, &fa, sizeof(fa)))
976 return -EFAULT;
977 return 0;
978}
979
Christoph Hellwig25fe55e2008-07-18 17:13:20 +1000980STATIC void
981xfs_set_diflags(
982 struct xfs_inode *ip,
983 unsigned int xflags)
984{
985 unsigned int di_flags;
986
987 /* can't set PREALLOC this way, just preserve it */
988 di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
989 if (xflags & XFS_XFLAG_IMMUTABLE)
990 di_flags |= XFS_DIFLAG_IMMUTABLE;
991 if (xflags & XFS_XFLAG_APPEND)
992 di_flags |= XFS_DIFLAG_APPEND;
993 if (xflags & XFS_XFLAG_SYNC)
994 di_flags |= XFS_DIFLAG_SYNC;
995 if (xflags & XFS_XFLAG_NOATIME)
996 di_flags |= XFS_DIFLAG_NOATIME;
997 if (xflags & XFS_XFLAG_NODUMP)
998 di_flags |= XFS_DIFLAG_NODUMP;
999 if (xflags & XFS_XFLAG_PROJINHERIT)
1000 di_flags |= XFS_DIFLAG_PROJINHERIT;
1001 if (xflags & XFS_XFLAG_NODEFRAG)
1002 di_flags |= XFS_DIFLAG_NODEFRAG;
1003 if (xflags & XFS_XFLAG_FILESTREAM)
1004 di_flags |= XFS_DIFLAG_FILESTREAM;
Al Viroabbede12011-07-26 02:31:30 -04001005 if (S_ISDIR(ip->i_d.di_mode)) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001006 if (xflags & XFS_XFLAG_RTINHERIT)
1007 di_flags |= XFS_DIFLAG_RTINHERIT;
1008 if (xflags & XFS_XFLAG_NOSYMLINKS)
1009 di_flags |= XFS_DIFLAG_NOSYMLINKS;
1010 if (xflags & XFS_XFLAG_EXTSZINHERIT)
1011 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
Al Viroabbede12011-07-26 02:31:30 -04001012 } else if (S_ISREG(ip->i_d.di_mode)) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001013 if (xflags & XFS_XFLAG_REALTIME)
1014 di_flags |= XFS_DIFLAG_REALTIME;
1015 if (xflags & XFS_XFLAG_EXTSIZE)
1016 di_flags |= XFS_DIFLAG_EXTSIZE;
1017 }
1018
1019 ip->i_d.di_flags = di_flags;
1020}
1021
Christoph Hellwigf13fae22008-07-21 16:16:15 +10001022STATIC void
1023xfs_diflags_to_linux(
1024 struct xfs_inode *ip)
1025{
David Chinnere4f75292008-08-13 16:00:45 +10001026 struct inode *inode = VFS_I(ip);
Christoph Hellwigf13fae22008-07-21 16:16:15 +10001027 unsigned int xflags = xfs_ip2xflags(ip);
1028
1029 if (xflags & XFS_XFLAG_IMMUTABLE)
1030 inode->i_flags |= S_IMMUTABLE;
1031 else
1032 inode->i_flags &= ~S_IMMUTABLE;
1033 if (xflags & XFS_XFLAG_APPEND)
1034 inode->i_flags |= S_APPEND;
1035 else
1036 inode->i_flags &= ~S_APPEND;
1037 if (xflags & XFS_XFLAG_SYNC)
1038 inode->i_flags |= S_SYNC;
1039 else
1040 inode->i_flags &= ~S_SYNC;
1041 if (xflags & XFS_XFLAG_NOATIME)
1042 inode->i_flags |= S_NOATIME;
1043 else
1044 inode->i_flags &= ~S_NOATIME;
1045}
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001046
1047#define FSX_PROJID 1
1048#define FSX_EXTSIZE 2
1049#define FSX_XFLAGS 4
1050#define FSX_NONBLOCK 8
1051
1052STATIC int
1053xfs_ioctl_setattr(
1054 xfs_inode_t *ip,
1055 struct fsxattr *fa,
1056 int mask)
1057{
1058 struct xfs_mount *mp = ip->i_mount;
1059 struct xfs_trans *tp;
1060 unsigned int lock_flags = 0;
Christoph Hellwig7d095252009-06-08 15:33:32 +02001061 struct xfs_dquot *udqp = NULL;
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001062 struct xfs_dquot *pdqp = NULL;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001063 struct xfs_dquot *olddquot = NULL;
1064 int code;
1065
Christoph Hellwigcca28fb2010-06-24 11:57:09 +10001066 trace_xfs_ioctl_setattr(ip);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001067
1068 if (mp->m_flags & XFS_MOUNT_RDONLY)
1069 return XFS_ERROR(EROFS);
1070 if (XFS_FORCED_SHUTDOWN(mp))
1071 return XFS_ERROR(EIO);
1072
1073 /*
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001074 * Disallow 32bit project ids when projid32bit feature is not enabled.
Arkadiusz Mi?kiewicz23963e52010-08-26 10:19:43 +00001075 */
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001076 if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) &&
1077 !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
Arkadiusz Mi?kiewicz23963e52010-08-26 10:19:43 +00001078 return XFS_ERROR(EINVAL);
1079
1080 /*
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001081 * If disk quotas is on, we make sure that the dquots do exist on disk,
1082 * before we start any other transactions. Trying to do this later
1083 * is messy. We don't care to take a readlock to look at the ids
1084 * in inode here, because we can't hold it across the trans_reserve.
1085 * If the IDs do change before we take the ilock, we're covered
1086 * because the i_*dquot fields will get updated anyway.
1087 */
1088 if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) {
Christoph Hellwig7d095252009-06-08 15:33:32 +02001089 code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid,
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001090 ip->i_d.di_gid, fa->fsx_projid,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001091 XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001092 if (code)
1093 return code;
1094 }
1095
1096 /*
1097 * For the other attributes, we acquire the inode lock and
1098 * first do an error checking pass.
1099 */
1100 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
Jie Liu3d3c8b52013-08-12 20:49:59 +10001101 code = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001102 if (code)
1103 goto error_return;
1104
1105 lock_flags = XFS_ILOCK_EXCL;
1106 xfs_ilock(ip, lock_flags);
1107
1108 /*
1109 * CAP_FOWNER overrides the following restrictions:
1110 *
1111 * The user ID of the calling process must be equal
1112 * to the file owner ID, except in cases where the
1113 * CAP_FSETID capability is applicable.
1114 */
Dwight Engenfd5e2aa2013-08-15 14:08:00 -04001115 if (!inode_owner_or_capable(VFS_I(ip))) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001116 code = XFS_ERROR(EPERM);
1117 goto error_return;
1118 }
1119
1120 /*
1121 * Do a quota reservation only if projid is actually going to change.
Dwight Engenfd5e2aa2013-08-15 14:08:00 -04001122 * Only allow changing of projid from init_user_ns since it is a
1123 * non user namespace aware identifier.
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001124 */
1125 if (mask & FSX_PROJID) {
Dwight Engenfd5e2aa2013-08-15 14:08:00 -04001126 if (current_user_ns() != &init_user_ns) {
1127 code = XFS_ERROR(EINVAL);
1128 goto error_return;
1129 }
1130
Christoph Hellwig7d095252009-06-08 15:33:32 +02001131 if (XFS_IS_QUOTA_RUNNING(mp) &&
1132 XFS_IS_PQUOTA_ON(mp) &&
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001133 xfs_get_projid(ip) != fa->fsx_projid) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001134 ASSERT(tp);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001135 code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL,
1136 pdqp, capable(CAP_FOWNER) ?
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001137 XFS_QMOPT_FORCE_RES : 0);
1138 if (code) /* out of quota */
1139 goto error_return;
1140 }
1141 }
1142
1143 if (mask & FSX_EXTSIZE) {
1144 /*
1145 * Can't change extent size if any extents are allocated.
1146 */
1147 if (ip->i_d.di_nextents &&
1148 ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) !=
1149 fa->fsx_extsize)) {
1150 code = XFS_ERROR(EINVAL); /* EFBIG? */
1151 goto error_return;
1152 }
1153
1154 /*
1155 * Extent size must be a multiple of the appropriate block
Dave Chinner53158372011-01-27 12:18:18 +11001156 * size, if set at all. It must also be smaller than the
1157 * maximum extent size supported by the filesystem.
1158 *
1159 * Also, for non-realtime files, limit the extent size hint to
1160 * half the size of the AGs in the filesystem so alignment
1161 * doesn't result in extents larger than an AG.
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001162 */
1163 if (fa->fsx_extsize != 0) {
Dave Chinner53158372011-01-27 12:18:18 +11001164 xfs_extlen_t size;
1165 xfs_fsblock_t extsize_fsb;
1166
1167 extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
1168 if (extsize_fsb > MAXEXTLEN) {
1169 code = XFS_ERROR(EINVAL);
1170 goto error_return;
1171 }
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001172
1173 if (XFS_IS_REALTIME_INODE(ip) ||
1174 ((mask & FSX_XFLAGS) &&
1175 (fa->fsx_xflags & XFS_XFLAG_REALTIME))) {
1176 size = mp->m_sb.sb_rextsize <<
1177 mp->m_sb.sb_blocklog;
1178 } else {
1179 size = mp->m_sb.sb_blocksize;
Dave Chinner53158372011-01-27 12:18:18 +11001180 if (extsize_fsb > mp->m_sb.sb_agblocks / 2) {
1181 code = XFS_ERROR(EINVAL);
1182 goto error_return;
1183 }
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001184 }
1185
1186 if (fa->fsx_extsize % size) {
1187 code = XFS_ERROR(EINVAL);
1188 goto error_return;
1189 }
1190 }
1191 }
1192
1193
1194 if (mask & FSX_XFLAGS) {
1195 /*
1196 * Can't change realtime flag if any extents are allocated.
1197 */
1198 if ((ip->i_d.di_nextents || ip->i_delayed_blks) &&
1199 (XFS_IS_REALTIME_INODE(ip)) !=
1200 (fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1201 code = XFS_ERROR(EINVAL); /* EFBIG? */
1202 goto error_return;
1203 }
1204
1205 /*
1206 * If realtime flag is set then must have realtime data.
1207 */
1208 if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) {
1209 if ((mp->m_sb.sb_rblocks == 0) ||
1210 (mp->m_sb.sb_rextsize == 0) ||
1211 (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) {
1212 code = XFS_ERROR(EINVAL);
1213 goto error_return;
1214 }
1215 }
1216
1217 /*
1218 * Can't modify an immutable/append-only file unless
1219 * we have appropriate permission.
1220 */
1221 if ((ip->i_d.di_flags &
1222 (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) ||
1223 (fa->fsx_xflags &
1224 (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) &&
1225 !capable(CAP_LINUX_IMMUTABLE)) {
1226 code = XFS_ERROR(EPERM);
1227 goto error_return;
1228 }
1229 }
1230
Christoph Hellwigddc34152011-09-19 15:00:54 +00001231 xfs_trans_ijoin(tp, ip, 0);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001232
1233 /*
1234 * Change file ownership. Must be the owner or privileged.
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001235 */
1236 if (mask & FSX_PROJID) {
1237 /*
1238 * CAP_FSETID overrides the following restrictions:
1239 *
1240 * The set-user-ID and set-group-ID bits of a file will be
1241 * cleared upon successful return from chown()
1242 */
1243 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
Dwight Engenfd5e2aa2013-08-15 14:08:00 -04001244 !inode_capable(VFS_I(ip), CAP_FSETID))
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001245 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
1246
1247 /*
1248 * Change the ownerships and register quota modifications
1249 * in the transaction.
1250 */
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001251 if (xfs_get_projid(ip) != fa->fsx_projid) {
Christoph Hellwig7d095252009-06-08 15:33:32 +02001252 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) {
1253 olddquot = xfs_qm_vop_chown(tp, ip,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001254 &ip->i_pdquot, pdqp);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001255 }
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +00001256 xfs_set_projid(ip, fa->fsx_projid);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001257
1258 /*
1259 * We may have to rev the inode as well as
1260 * the superblock version number since projids didn't
1261 * exist before DINODE_VERSION_2 and SB_VERSION_NLINK.
1262 */
Christoph Hellwig51ce16d2008-11-28 14:23:39 +11001263 if (ip->i_d.di_version == 1)
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001264 xfs_bump_ino_vers2(tp, ip);
1265 }
1266
1267 }
1268
1269 if (mask & FSX_EXTSIZE)
1270 ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog;
Christoph Hellwigf13fae22008-07-21 16:16:15 +10001271 if (mask & FSX_XFLAGS) {
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001272 xfs_set_diflags(ip, fa->fsx_xflags);
Christoph Hellwigf13fae22008-07-21 16:16:15 +10001273 xfs_diflags_to_linux(ip);
1274 }
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001275
Dave Chinnerdcd79a12010-09-28 12:27:25 +10001276 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001277 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001278
1279 XFS_STATS_INC(xs_ig_attrchg);
1280
1281 /*
1282 * If this is a synchronous mount, make sure that the
1283 * transaction goes to disk before returning to the user.
1284 * This is slightly sub-optimal in that truncates require
1285 * two sync transactions instead of one for wsync filesystems.
1286 * One for the truncate and one for the timestamps since we
1287 * don't want to change the timestamps unless we're sure the
1288 * truncate worked. Truncates are less than 1% of the laddis
1289 * mix so this probably isn't worth the trouble to optimize.
1290 */
1291 if (mp->m_flags & XFS_MOUNT_WSYNC)
1292 xfs_trans_set_sync(tp);
1293 code = xfs_trans_commit(tp, 0);
1294 xfs_iunlock(ip, lock_flags);
1295
1296 /*
1297 * Release any dquot(s) the inode had kept before chown.
1298 */
Christoph Hellwig7d095252009-06-08 15:33:32 +02001299 xfs_qm_dqrele(olddquot);
1300 xfs_qm_dqrele(udqp);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001301 xfs_qm_dqrele(pdqp);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001302
Christoph Hellwig288699f2010-06-23 18:11:15 +10001303 return code;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001304
1305 error_return:
Christoph Hellwig7d095252009-06-08 15:33:32 +02001306 xfs_qm_dqrele(udqp);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001307 xfs_qm_dqrele(pdqp);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001308 xfs_trans_cancel(tp, 0);
1309 if (lock_flags)
1310 xfs_iunlock(ip, lock_flags);
1311 return code;
1312}
1313
Christoph Hellwigc83bfab2007-10-11 17:47:00 +10001314STATIC int
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001315xfs_ioc_fssetxattr(
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316 xfs_inode_t *ip,
1317 struct file *filp,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 void __user *arg)
1319{
1320 struct fsxattr fa;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001321 unsigned int mask;
Jan Karad9457dc2012-06-12 16:20:39 +02001322 int error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001323
1324 if (copy_from_user(&fa, arg, sizeof(fa)))
1325 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001327 mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001328 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001329 mask |= FSX_NONBLOCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330
Jan Karad9457dc2012-06-12 16:20:39 +02001331 error = mnt_want_write_file(filp);
1332 if (error)
1333 return error;
1334 error = xfs_ioctl_setattr(ip, &fa, mask);
1335 mnt_drop_write_file(filp);
1336 return -error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001337}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001339STATIC int
1340xfs_ioc_getxflags(
1341 xfs_inode_t *ip,
1342 void __user *arg)
1343{
1344 unsigned int flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001346 flags = xfs_di2lxflags(ip->i_d.di_flags);
1347 if (copy_to_user(arg, &flags, sizeof(flags)))
1348 return -EFAULT;
1349 return 0;
1350}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001352STATIC int
1353xfs_ioc_setxflags(
1354 xfs_inode_t *ip,
1355 struct file *filp,
1356 void __user *arg)
1357{
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001358 struct fsxattr fa;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001359 unsigned int flags;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001360 unsigned int mask;
Jan Karad9457dc2012-06-12 16:20:39 +02001361 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001363 if (copy_from_user(&flags, arg, sizeof(flags)))
1364 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001366 if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \
1367 FS_NOATIME_FL | FS_NODUMP_FL | \
1368 FS_SYNC_FL))
1369 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001371 mask = FSX_XFLAGS;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001372 if (filp->f_flags & (O_NDELAY|O_NONBLOCK))
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001373 mask |= FSX_NONBLOCK;
1374 fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375
Jan Karad9457dc2012-06-12 16:20:39 +02001376 error = mnt_want_write_file(filp);
1377 if (error)
1378 return error;
1379 error = xfs_ioctl_setattr(ip, &fa, mask);
1380 mnt_drop_write_file(filp);
1381 return -error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382}
1383
1384STATIC int
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001385xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full)
1386{
1387 struct getbmap __user *base = *ap;
1388
1389 /* copy only getbmap portion (not getbmapx) */
1390 if (copy_to_user(base, bmv, sizeof(struct getbmap)))
1391 return XFS_ERROR(EFAULT);
1392
1393 *ap += sizeof(struct getbmap);
1394 return 0;
1395}
1396
1397STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398xfs_ioc_getbmap(
Christoph Hellwig993386c2007-08-28 16:12:30 +10001399 struct xfs_inode *ip,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400 int ioflags,
1401 unsigned int cmd,
1402 void __user *arg)
1403{
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001404 struct getbmapx bmx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405 int error;
1406
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001407 if (copy_from_user(&bmx, arg, sizeof(struct getbmapx)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408 return -XFS_ERROR(EFAULT);
1409
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001410 if (bmx.bmv_count < 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411 return -XFS_ERROR(EINVAL);
1412
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001413 bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414 if (ioflags & IO_INVIS)
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001415 bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001417 error = xfs_getbmap(ip, &bmx, xfs_getbmap_format,
1418 (struct getbmap *)arg+1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419 if (error)
1420 return -error;
1421
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001422 /* copy back header - only size of getbmap */
1423 if (copy_to_user(arg, &bmx, sizeof(struct getbmap)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424 return -XFS_ERROR(EFAULT);
1425 return 0;
1426}
1427
1428STATIC int
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001429xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full)
1430{
1431 struct getbmapx __user *base = *ap;
1432
1433 if (copy_to_user(base, bmv, sizeof(struct getbmapx)))
1434 return XFS_ERROR(EFAULT);
1435
1436 *ap += sizeof(struct getbmapx);
1437 return 0;
1438}
1439
1440STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441xfs_ioc_getbmapx(
Christoph Hellwig993386c2007-08-28 16:12:30 +10001442 struct xfs_inode *ip,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443 void __user *arg)
1444{
1445 struct getbmapx bmx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446 int error;
1447
1448 if (copy_from_user(&bmx, arg, sizeof(bmx)))
1449 return -XFS_ERROR(EFAULT);
1450
1451 if (bmx.bmv_count < 2)
1452 return -XFS_ERROR(EINVAL);
1453
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001454 if (bmx.bmv_iflags & (~BMV_IF_VALID))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001455 return -XFS_ERROR(EINVAL);
1456
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001457 error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format,
1458 (struct getbmapx *)arg+1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001459 if (error)
1460 return -error;
1461
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001462 /* copy back header */
1463 if (copy_to_user(arg, &bmx, sizeof(struct getbmapx)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464 return -XFS_ERROR(EFAULT);
1465
1466 return 0;
1467}
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001468
Dave Chinnera133d952013-08-12 20:49:48 +10001469int
1470xfs_ioc_swapext(
1471 xfs_swapext_t *sxp)
1472{
1473 xfs_inode_t *ip, *tip;
1474 struct fd f, tmp;
1475 int error = 0;
1476
1477 /* Pull information for the target fd */
1478 f = fdget((int)sxp->sx_fdtarget);
1479 if (!f.file) {
1480 error = XFS_ERROR(EINVAL);
1481 goto out;
1482 }
1483
1484 if (!(f.file->f_mode & FMODE_WRITE) ||
1485 !(f.file->f_mode & FMODE_READ) ||
1486 (f.file->f_flags & O_APPEND)) {
1487 error = XFS_ERROR(EBADF);
1488 goto out_put_file;
1489 }
1490
1491 tmp = fdget((int)sxp->sx_fdtmp);
1492 if (!tmp.file) {
1493 error = XFS_ERROR(EINVAL);
1494 goto out_put_file;
1495 }
1496
1497 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1498 !(tmp.file->f_mode & FMODE_READ) ||
1499 (tmp.file->f_flags & O_APPEND)) {
1500 error = XFS_ERROR(EBADF);
1501 goto out_put_tmp_file;
1502 }
1503
1504 if (IS_SWAPFILE(file_inode(f.file)) ||
1505 IS_SWAPFILE(file_inode(tmp.file))) {
1506 error = XFS_ERROR(EINVAL);
1507 goto out_put_tmp_file;
1508 }
1509
1510 ip = XFS_I(file_inode(f.file));
1511 tip = XFS_I(file_inode(tmp.file));
1512
1513 if (ip->i_mount != tip->i_mount) {
1514 error = XFS_ERROR(EINVAL);
1515 goto out_put_tmp_file;
1516 }
1517
1518 if (ip->i_ino == tip->i_ino) {
1519 error = XFS_ERROR(EINVAL);
1520 goto out_put_tmp_file;
1521 }
1522
1523 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
1524 error = XFS_ERROR(EIO);
1525 goto out_put_tmp_file;
1526 }
1527
1528 error = xfs_swap_extents(ip, tip, sxp);
1529
1530 out_put_tmp_file:
1531 fdput(tmp);
1532 out_put_file:
1533 fdput(f);
1534 out:
1535 return error;
1536}
1537
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001538/*
1539 * Note: some of the ioctl's return positive numbers as a
1540 * byte count indicating success, such as readlink_by_handle.
1541 * So we don't "sign flip" like most other routines. This means
1542 * true errors need to be returned as a negative value.
1543 */
1544long
1545xfs_file_ioctl(
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001546 struct file *filp,
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001547 unsigned int cmd,
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001548 unsigned long p)
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001549{
Al Viro496ad9a2013-01-23 17:07:38 -05001550 struct inode *inode = file_inode(filp);
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001551 struct xfs_inode *ip = XFS_I(inode);
1552 struct xfs_mount *mp = ip->i_mount;
1553 void __user *arg = (void __user *)p;
1554 int ioflags = 0;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001555 int error;
1556
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001557 if (filp->f_mode & FMODE_NOCMTIME)
1558 ioflags |= IO_INVIS;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001559
Christoph Hellwigcca28fb2010-06-24 11:57:09 +10001560 trace_xfs_file_ioctl(ip);
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001561
1562 switch (cmd) {
Christoph Hellwiga46db602011-01-07 13:02:04 +00001563 case FITRIM:
1564 return xfs_ioc_trim(mp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001565 case XFS_IOC_ALLOCSP:
1566 case XFS_IOC_FREESP:
1567 case XFS_IOC_RESVSP:
1568 case XFS_IOC_UNRESVSP:
1569 case XFS_IOC_ALLOCSP64:
1570 case XFS_IOC_FREESP64:
1571 case XFS_IOC_RESVSP64:
Dave Chinner44722352010-08-24 12:02:11 +10001572 case XFS_IOC_UNRESVSP64:
1573 case XFS_IOC_ZERO_RANGE: {
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001574 xfs_flock64_t bf;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001575
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001576 if (copy_from_user(&bf, arg, sizeof(bf)))
1577 return -XFS_ERROR(EFAULT);
1578 return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
1579 }
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001580 case XFS_IOC_DIOINFO: {
1581 struct dioattr da;
1582 xfs_buftarg_t *target =
1583 XFS_IS_REALTIME_INODE(ip) ?
1584 mp->m_rtdev_targp : mp->m_ddev_targp;
1585
Eric Sandeen7c71ee72014-01-21 16:46:23 -06001586 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001587 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1588
1589 if (copy_to_user(arg, &da, sizeof(da)))
1590 return -XFS_ERROR(EFAULT);
1591 return 0;
1592 }
1593
1594 case XFS_IOC_FSBULKSTAT_SINGLE:
1595 case XFS_IOC_FSBULKSTAT:
1596 case XFS_IOC_FSINUMBERS:
1597 return xfs_ioc_bulkstat(mp, cmd, arg);
1598
1599 case XFS_IOC_FSGEOMETRY_V1:
1600 return xfs_ioc_fsgeometry_v1(mp, arg);
1601
1602 case XFS_IOC_FSGEOMETRY:
1603 return xfs_ioc_fsgeometry(mp, arg);
1604
1605 case XFS_IOC_GETVERSION:
1606 return put_user(inode->i_generation, (int __user *)arg);
1607
1608 case XFS_IOC_FSGETXATTR:
1609 return xfs_ioc_fsgetxattr(ip, 0, arg);
1610 case XFS_IOC_FSGETXATTRA:
1611 return xfs_ioc_fsgetxattr(ip, 1, arg);
Lachlan McIlroy3b2816b2008-04-18 12:43:35 +10001612 case XFS_IOC_FSSETXATTR:
Lachlan McIlroy65e67f52008-04-18 12:59:45 +10001613 return xfs_ioc_fssetxattr(ip, filp, arg);
1614 case XFS_IOC_GETXFLAGS:
1615 return xfs_ioc_getxflags(ip, arg);
1616 case XFS_IOC_SETXFLAGS:
1617 return xfs_ioc_setxflags(ip, filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001618
1619 case XFS_IOC_FSSETDM: {
1620 struct fsdmidata dmi;
1621
1622 if (copy_from_user(&dmi, arg, sizeof(dmi)))
1623 return -XFS_ERROR(EFAULT);
1624
Jan Karad9457dc2012-06-12 16:20:39 +02001625 error = mnt_want_write_file(filp);
1626 if (error)
1627 return error;
1628
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001629 error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask,
1630 dmi.fsd_dmstate);
Jan Karad9457dc2012-06-12 16:20:39 +02001631 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001632 return -error;
1633 }
1634
1635 case XFS_IOC_GETBMAP:
1636 case XFS_IOC_GETBMAPA:
1637 return xfs_ioc_getbmap(ip, ioflags, cmd, arg);
1638
1639 case XFS_IOC_GETBMAPX:
1640 return xfs_ioc_getbmapx(ip, arg);
1641
1642 case XFS_IOC_FD_TO_HANDLE:
1643 case XFS_IOC_PATH_TO_HANDLE:
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001644 case XFS_IOC_PATH_TO_FSHANDLE: {
1645 xfs_fsop_handlereq_t hreq;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001646
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001647 if (copy_from_user(&hreq, arg, sizeof(hreq)))
1648 return -XFS_ERROR(EFAULT);
1649 return xfs_find_handle(cmd, &hreq);
1650 }
1651 case XFS_IOC_OPEN_BY_HANDLE: {
1652 xfs_fsop_handlereq_t hreq;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001653
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001654 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1655 return -XFS_ERROR(EFAULT);
Christoph Hellwigd296d302009-01-19 02:02:57 +01001656 return xfs_open_by_handle(filp, &hreq);
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001657 }
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001658 case XFS_IOC_FSSETDM_BY_HANDLE:
Christoph Hellwigd296d302009-01-19 02:02:57 +01001659 return xfs_fssetdm_by_handle(filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001660
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001661 case XFS_IOC_READLINK_BY_HANDLE: {
1662 xfs_fsop_handlereq_t hreq;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001663
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001664 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
1665 return -XFS_ERROR(EFAULT);
Christoph Hellwigd296d302009-01-19 02:02:57 +01001666 return xfs_readlink_by_handle(filp, &hreq);
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001667 }
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001668 case XFS_IOC_ATTRLIST_BY_HANDLE:
Christoph Hellwigd296d302009-01-19 02:02:57 +01001669 return xfs_attrlist_by_handle(filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001670
1671 case XFS_IOC_ATTRMULTI_BY_HANDLE:
Christoph Hellwigd296d302009-01-19 02:02:57 +01001672 return xfs_attrmulti_by_handle(filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001673
1674 case XFS_IOC_SWAPEXT: {
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001675 struct xfs_swapext sxp;
1676
1677 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
1678 return -XFS_ERROR(EFAULT);
Jan Karad9457dc2012-06-12 16:20:39 +02001679 error = mnt_want_write_file(filp);
1680 if (error)
1681 return error;
Dave Chinnera133d952013-08-12 20:49:48 +10001682 error = xfs_ioc_swapext(&sxp);
Jan Karad9457dc2012-06-12 16:20:39 +02001683 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001684 return -error;
1685 }
1686
1687 case XFS_IOC_FSCOUNTS: {
1688 xfs_fsop_counts_t out;
1689
1690 error = xfs_fs_counts(mp, &out);
1691 if (error)
1692 return -error;
1693
1694 if (copy_to_user(arg, &out, sizeof(out)))
1695 return -XFS_ERROR(EFAULT);
1696 return 0;
1697 }
1698
1699 case XFS_IOC_SET_RESBLKS: {
1700 xfs_fsop_resblks_t inout;
1701 __uint64_t in;
1702
1703 if (!capable(CAP_SYS_ADMIN))
1704 return -EPERM;
1705
Eric Sandeend5db0f92010-02-05 22:59:53 +00001706 if (mp->m_flags & XFS_MOUNT_RDONLY)
1707 return -XFS_ERROR(EROFS);
1708
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001709 if (copy_from_user(&inout, arg, sizeof(inout)))
1710 return -XFS_ERROR(EFAULT);
1711
Jan Karad9457dc2012-06-12 16:20:39 +02001712 error = mnt_want_write_file(filp);
1713 if (error)
1714 return error;
1715
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001716 /* input parameter is passed in resblks field of structure */
1717 in = inout.resblks;
1718 error = xfs_reserve_blocks(mp, &in, &inout);
Jan Karad9457dc2012-06-12 16:20:39 +02001719 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001720 if (error)
1721 return -error;
1722
1723 if (copy_to_user(arg, &inout, sizeof(inout)))
1724 return -XFS_ERROR(EFAULT);
1725 return 0;
1726 }
1727
1728 case XFS_IOC_GET_RESBLKS: {
1729 xfs_fsop_resblks_t out;
1730
1731 if (!capable(CAP_SYS_ADMIN))
1732 return -EPERM;
1733
1734 error = xfs_reserve_blocks(mp, NULL, &out);
1735 if (error)
1736 return -error;
1737
1738 if (copy_to_user(arg, &out, sizeof(out)))
1739 return -XFS_ERROR(EFAULT);
1740
1741 return 0;
1742 }
1743
1744 case XFS_IOC_FSGROWFSDATA: {
1745 xfs_growfs_data_t in;
1746
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001747 if (copy_from_user(&in, arg, sizeof(in)))
1748 return -XFS_ERROR(EFAULT);
1749
Jan Karad9457dc2012-06-12 16:20:39 +02001750 error = mnt_want_write_file(filp);
1751 if (error)
1752 return error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001753 error = xfs_growfs_data(mp, &in);
Jan Karad9457dc2012-06-12 16:20:39 +02001754 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001755 return -error;
1756 }
1757
1758 case XFS_IOC_FSGROWFSLOG: {
1759 xfs_growfs_log_t in;
1760
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001761 if (copy_from_user(&in, arg, sizeof(in)))
1762 return -XFS_ERROR(EFAULT);
1763
Jan Karad9457dc2012-06-12 16:20:39 +02001764 error = mnt_want_write_file(filp);
1765 if (error)
1766 return error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001767 error = xfs_growfs_log(mp, &in);
Jan Karad9457dc2012-06-12 16:20:39 +02001768 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001769 return -error;
1770 }
1771
1772 case XFS_IOC_FSGROWFSRT: {
1773 xfs_growfs_rt_t in;
1774
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001775 if (copy_from_user(&in, arg, sizeof(in)))
1776 return -XFS_ERROR(EFAULT);
1777
Jan Karad9457dc2012-06-12 16:20:39 +02001778 error = mnt_want_write_file(filp);
1779 if (error)
1780 return error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001781 error = xfs_growfs_rt(mp, &in);
Jan Karad9457dc2012-06-12 16:20:39 +02001782 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001783 return -error;
1784 }
1785
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001786 case XFS_IOC_GOINGDOWN: {
1787 __uint32_t in;
1788
1789 if (!capable(CAP_SYS_ADMIN))
1790 return -EPERM;
1791
1792 if (get_user(in, (__uint32_t __user *)arg))
1793 return -XFS_ERROR(EFAULT);
1794
1795 error = xfs_fs_goingdown(mp, in);
1796 return -error;
1797 }
1798
1799 case XFS_IOC_ERROR_INJECTION: {
1800 xfs_error_injection_t in;
1801
1802 if (!capable(CAP_SYS_ADMIN))
1803 return -EPERM;
1804
1805 if (copy_from_user(&in, arg, sizeof(in)))
1806 return -XFS_ERROR(EFAULT);
1807
1808 error = xfs_errortag_add(in.errtag, mp);
1809 return -error;
1810 }
1811
1812 case XFS_IOC_ERROR_CLEARALL:
1813 if (!capable(CAP_SYS_ADMIN))
1814 return -EPERM;
1815
1816 error = xfs_errortag_clearall(mp, 1);
1817 return -error;
1818
Brian Foster8ca149d2012-11-07 12:21:12 -05001819 case XFS_IOC_FREE_EOFBLOCKS: {
Dwight Engenb9fe5052013-08-15 14:08:02 -04001820 struct xfs_fs_eofblocks eofb;
1821 struct xfs_eofblocks keofb;
Brian Foster8ca149d2012-11-07 12:21:12 -05001822
Dwight Engen8c567a72013-08-15 14:08:03 -04001823 if (!capable(CAP_SYS_ADMIN))
1824 return -EPERM;
1825
1826 if (mp->m_flags & XFS_MOUNT_RDONLY)
1827 return -XFS_ERROR(EROFS);
1828
Brian Foster8ca149d2012-11-07 12:21:12 -05001829 if (copy_from_user(&eofb, arg, sizeof(eofb)))
1830 return -XFS_ERROR(EFAULT);
1831
Dwight Engenb9fe5052013-08-15 14:08:02 -04001832 error = xfs_fs_eofblocks_from_user(&eofb, &keofb);
1833 if (error)
1834 return -error;
Brian Foster8ca149d2012-11-07 12:21:12 -05001835
Dwight Engenb9fe5052013-08-15 14:08:02 -04001836 return -xfs_icache_free_eofblocks(mp, &keofb);
Brian Foster8ca149d2012-11-07 12:21:12 -05001837 }
1838
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001839 default:
1840 return -ENOTTY;
1841 }
1842}