[linux.git] / fs / cifs / ioctl.c

/*
 *   fs/cifs/ioctl.c
 *
 *   vfs operations that deal with io control
 *
 *   Copyright (C) International Business Machines  Corp., 2005,2013
 *   Author(s): Steve French ([email protected])
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published
 *   by the Free Software Foundation; either version 2.1 of the License, or
 *   (at your option) any later version.
 *
 *   This library is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include <linux/fs.h>
#include <linux/file.h>
#include <linux/mount.h>
#include <linux/mm.h>
#include <linux/pagemap.h>
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifsproto.h"
#include "cifs_debug.h"
#include "cifsfs.h"
#include "cifs_ioctl.h"
#include "smb2proto.h"
#include <linux/btrfs.h>

static long cifs_ioctl_query_info(unsigned int xid, struct file *filep,
				  unsigned long p)
{
	struct inode *inode = file_inode(filep);
	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
	struct dentry *dentry = filep->f_path.dentry;
	unsigned char *path;
	__le16 *utf16_path = NULL, root_path;
	int rc = 0;

	path = build_path_from_dentry(dentry);
	if (path == NULL)
		return -ENOMEM;

	cifs_dbg(FYI, "%s %s\n", __func__, path);

	if (!path[0]) {
		root_path = 0;
		utf16_path = &root_path;
	} else {
		utf16_path = cifs_convert_path_to_utf16(path + 1, cifs_sb);
		if (!utf16_path) {
			rc = -ENOMEM;
			goto ici_exit;
		}
	}

	if (tcon->ses->server->ops->ioctl_query_info)
		rc = tcon->ses->server->ops->ioctl_query_info(
				xid, tcon, utf16_path,
				filep->private_data ? 0 : 1, p);
	else
		rc = -EOPNOTSUPP;

 ici_exit:
	if (utf16_path != &root_path)
		kfree(utf16_path);
	kfree(path);
	return rc;
}

static long cifs_ioctl_copychunk(unsigned int xid, struct file *dst_file,
			unsigned long srcfd)
{
	int rc;
	struct fd src_file;
	struct inode *src_inode;

	cifs_dbg(FYI, "ioctl copychunk range\n");
	/* the destination must be opened for writing */
	if (!(dst_file->f_mode & FMODE_WRITE)) {
		cifs_dbg(FYI, "file target not open for write\n");
		return -EINVAL;
	}

	/* check if target volume is readonly and take reference */
	rc = mnt_want_write_file(dst_file);
	if (rc) {
		cifs_dbg(FYI, "mnt_want_write failed with rc %d\n", rc);
		return rc;
	}

	src_file = fdget(srcfd);
	if (!src_file.file) {
		rc = -EBADF;
		goto out_drop_write;
	}

	if (src_file.file->f_op->unlocked_ioctl != cifs_ioctl) {
		rc = -EBADF;
		cifs_dbg(VFS, "src file seems to be from a different filesystem type\n");
		goto out_fput;
	}

	src_inode = file_inode(src_file.file);
	rc = -EINVAL;
	if (S_ISDIR(src_inode->i_mode))
		goto out_fput;

	rc = cifs_file_copychunk_range(xid, src_file.file, 0, dst_file, 0,
					src_inode->i_size, 0);
	if (rc > 0)
		rc = 0;
out_fput:
	fdput(src_file);
out_drop_write:
	mnt_drop_write_file(dst_file);
	return rc;
}

static long smb_mnt_get_fsinfo(unsigned int xid, struct cifs_tcon *tcon,
				void __user *arg)
{
	int rc = 0;
	struct smb_mnt_fs_info *fsinf;

	fsinf = kzalloc(sizeof(struct smb_mnt_fs_info), GFP_KERNEL);
	if (fsinf == NULL)
		return -ENOMEM;

	fsinf->version = 1;
	fsinf->protocol_id = tcon->ses->server->vals->protocol_id;
	fsinf->device_characteristics =
			le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics);
	fsinf->device_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
	fsinf->fs_attributes = le32_to_cpu(tcon->fsAttrInfo.Attributes);
	fsinf->max_path_component =
		le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength);
	fsinf->vol_serial_number = tcon->vol_serial_number;
	fsinf->vol_create_time = le64_to_cpu(tcon->vol_create_time);
	fsinf->share_flags = tcon->share_flags;
	fsinf->share_caps = le32_to_cpu(tcon->capabilities);
	fsinf->sector_flags = tcon->ss_flags;
	fsinf->optimal_sector_size = tcon->perf_sector_size;
	fsinf->max_bytes_chunk = tcon->max_bytes_chunk;
	fsinf->maximal_access = tcon->maximal_access;
	fsinf->cifs_posix_caps = le64_to_cpu(tcon->fsUnixInfo.Capability);

	if (copy_to_user(arg, fsinf, sizeof(struct smb_mnt_fs_info)))
		rc = -EFAULT;

	kfree(fsinf);
	return rc;
}

long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
{
	struct inode *inode = file_inode(filep);
	int rc = -ENOTTY; /* strange error - but the precedent */
	unsigned int xid;
	struct cifsFileInfo *pSMBFile = filep->private_data;
	struct cifs_tcon *tcon;
	__u64	ExtAttrBits = 0;
	__u64   caps;

	xid = get_xid();

	cifs_dbg(FYI, "cifs ioctl 0x%x\n", command);
	switch (command) {
		case FS_IOC_GETFLAGS:
			if (pSMBFile == NULL)
				break;
			tcon = tlink_tcon(pSMBFile->tlink);
			caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
#ifdef CONFIG_CIFS_POSIX
			if (CIFS_UNIX_EXTATTR_CAP & caps) {
				__u64	ExtAttrMask = 0;
				rc = CIFSGetExtAttr(xid, tcon,
						    pSMBFile->fid.netfid,
						    &ExtAttrBits, &ExtAttrMask);
				if (rc == 0)
					rc = put_user(ExtAttrBits &
						FS_FL_USER_VISIBLE,
						(int __user *)arg);
				if (rc != EOPNOTSUPP)
					break;
			}
#endif /* CONFIG_CIFS_POSIX */
			rc = 0;
			if (CIFS_I(inode)->cifsAttrs & ATTR_COMPRESSED) {
				/* add in the compressed bit */
				ExtAttrBits = FS_COMPR_FL;
				rc = put_user(ExtAttrBits & FS_FL_USER_VISIBLE,
					      (int __user *)arg);
			}
			break;
		case FS_IOC_SETFLAGS:
			if (pSMBFile == NULL)
				break;
			tcon = tlink_tcon(pSMBFile->tlink);
			caps = le64_to_cpu(tcon->fsUnixInfo.Capability);

			if (get_user(ExtAttrBits, (int __user *)arg)) {
				rc = -EFAULT;
				break;
			}

			/*
			 * if (CIFS_UNIX_EXTATTR_CAP & caps)
			 *	rc = CIFSSetExtAttr(xid, tcon,
			 *		       pSMBFile->fid.netfid,
			 *		       extAttrBits,
			 *		       &ExtAttrMask);
			 * if (rc != EOPNOTSUPP)
			 *	break;
			 */

			/* Currently only flag we can set is compressed flag */
			if ((ExtAttrBits & FS_COMPR_FL) == 0)
				break;

			/* Try to set compress flag */
			if (tcon->ses->server->ops->set_compression) {
				rc = tcon->ses->server->ops->set_compression(
							xid, tcon, pSMBFile);
				cifs_dbg(FYI, "set compress flag rc %d\n", rc);
			}
			break;
		case CIFS_IOC_COPYCHUNK_FILE:
			rc = cifs_ioctl_copychunk(xid, filep, arg);
			break;
		case CIFS_QUERY_INFO:
			rc = cifs_ioctl_query_info(xid, filep, arg);
			break;
		case CIFS_IOC_SET_INTEGRITY:
			if (pSMBFile == NULL)
				break;
			tcon = tlink_tcon(pSMBFile->tlink);
			if (tcon->ses->server->ops->set_integrity)
				rc = tcon->ses->server->ops->set_integrity(xid,
						tcon, pSMBFile);
			else
				rc = -EOPNOTSUPP;
			break;
		case CIFS_IOC_GET_MNT_INFO:
			if (pSMBFile == NULL)
				break;
			tcon = tlink_tcon(pSMBFile->tlink);
			rc = smb_mnt_get_fsinfo(xid, tcon, (void __user *)arg);
			break;
		case CIFS_ENUMERATE_SNAPSHOTS:
			if (pSMBFile == NULL)
				break;
			if (arg == 0) {
				rc = -EINVAL;
				goto cifs_ioc_exit;
			}
			tcon = tlink_tcon(pSMBFile->tlink);
			if (tcon->ses->server->ops->enum_snapshots)
				rc = tcon->ses->server->ops->enum_snapshots(xid, tcon,
						pSMBFile, (void __user *)arg);
			else
				rc = -EOPNOTSUPP;
			break;
		default:
			cifs_dbg(FYI, "unsupported ioctl\n");
			break;
	}
cifs_ioc_exit:
	free_xid(xid);
	return rc;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* fs/cifs/ioctl.c
	3	*
	4	* vfs operations that deal with io control
	5	*
64a5cfa6	6	* Copyright (C) International Business Machines Corp., 2005,2013
1da177e4 LT	7	* Author(s): Steve French ([email protected])
	8	*
	9	* This library is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU Lesser General Public License as published
	11	* by the Free Software Foundation; either version 2.1 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This library is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
	17	* the GNU Lesser General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU Lesser General Public License
	20	* along with this library; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	22	*/
f654bac2	23
1da177e4	24	#include <linux/fs.h>
41c1358e SF	25	#include <linux/file.h>
	26	#include <linux/mount.h>
	27	#include <linux/mm.h>
	28	#include <linux/pagemap.h>
1da177e4 LT	29	#include "cifspdu.h"
	30	#include "cifsglob.h"
	31	#include "cifsproto.h"
	32	#include "cifs_debug.h"
c67593a0	33	#include "cifsfs.h"
0de1f4c6	34	#include "cifs_ioctl.h"
8d8b26e5	35	#include "smb2proto.h"
02b16665	36	#include <linux/btrfs.h>
1da177e4	37
f5b05d62 RS	38	static long cifs_ioctl_query_info(unsigned int xid, struct file *filep,
	39	unsigned long p)
	40	{
8d8b26e5 RS	41	struct inode *inode = file_inode(filep);
	42	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
	43	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
	44	struct dentry *dentry = filep->f_path.dentry;
	45	unsigned char *path;
	46	__le16 *utf16_path = NULL, root_path;
	47	int rc = 0;
f5b05d62	48
8d8b26e5 RS	49	path = build_path_from_dentry(dentry);
	50	if (path == NULL)
	51	return -ENOMEM;
	52
	53	cifs_dbg(FYI, "%s %s\n", __func__, path);
	54
	55	if (!path[0]) {
	56	root_path = 0;
	57	utf16_path = &root_path;
	58	} else {
	59	utf16_path = cifs_convert_path_to_utf16(path + 1, cifs_sb);
	60	if (!utf16_path) {
	61	rc = -ENOMEM;
	62	goto ici_exit;
	63	}
	64	}
f5b05d62 RS	65
f5b05d62 RS	66	if (tcon->ses->server->ops->ioctl_query_info)
8d8b26e5 RS	67	rc = tcon->ses->server->ops->ioctl_query_info(
	68	xid, tcon, utf16_path,
	69	filep->private_data ? 0 : 1, p);
f5b05d62	70	else
8d8b26e5 RS	71	rc = -EOPNOTSUPP;
	72
	73	ici_exit:
	74	if (utf16_path != &root_path)
	75	kfree(utf16_path);
	76	kfree(path);
	77	return rc;
f5b05d62 RS	78	}
f5b05d62 RS	79
312bbc59	80	static long cifs_ioctl_copychunk(unsigned int xid, struct file *dst_file,
04b38d60 CH	81	unsigned long srcfd)
	82	{
	83	int rc;
	84	struct fd src_file;
	85	struct inode *src_inode;
	86
312bbc59	87	cifs_dbg(FYI, "ioctl copychunk range\n");
04b38d60 CH	88	/* the destination must be opened for writing */
	89	if (!(dst_file->f_mode & FMODE_WRITE)) {
	90	cifs_dbg(FYI, "file target not open for write\n");
	91	return -EINVAL;
	92	}
	93
	94	/* check if target volume is readonly and take reference */
	95	rc = mnt_want_write_file(dst_file);
	96	if (rc) {
	97	cifs_dbg(FYI, "mnt_want_write failed with rc %d\n", rc);
	98	return rc;
	99	}
	100
	101	src_file = fdget(srcfd);
	102	if (!src_file.file) {
	103	rc = -EBADF;
	104	goto out_drop_write;
	105	}
	106
	107	if (src_file.file->f_op->unlocked_ioctl != cifs_ioctl) {
	108	rc = -EBADF;
	109	cifs_dbg(VFS, "src file seems to be from a different filesystem type\n");
	110	goto out_fput;
	111	}
	112
	113	src_inode = file_inode(src_file.file);
	114	rc = -EINVAL;
	115	if (S_ISDIR(src_inode->i_mode))
	116	goto out_fput;
	117
620d8745 SP	118	rc = cifs_file_copychunk_range(xid, src_file.file, 0, dst_file, 0,
620d8745 SP	119	src_inode->i_size, 0);
7d0c234f SP	120	if (rc > 0)
7d0c234f SP	121	rc = 0;
41c1358e SF	122	out_fput:
	123	fdput(src_file);
	124	out_drop_write:
	125	mnt_drop_write_file(dst_file);
	126	return rc;
	127	}
	128
0de1f4c6 SF	129	static long smb_mnt_get_fsinfo(unsigned int xid, struct cifs_tcon *tcon,
	130	void __user *arg)
	131	{
	132	int rc = 0;
	133	struct smb_mnt_fs_info *fsinf;
	134
	135	fsinf = kzalloc(sizeof(struct smb_mnt_fs_info), GFP_KERNEL);
	136	if (fsinf == NULL)
	137	return -ENOMEM;
	138
	139	fsinf->version = 1;
	140	fsinf->protocol_id = tcon->ses->server->vals->protocol_id;
	141	fsinf->device_characteristics =
	142	le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics);
	143	fsinf->device_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
	144	fsinf->fs_attributes = le32_to_cpu(tcon->fsAttrInfo.Attributes);
	145	fsinf->max_path_component =
	146	le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength);
0de1f4c6 SF	147	fsinf->vol_serial_number = tcon->vol_serial_number;
	148	fsinf->vol_create_time = le64_to_cpu(tcon->vol_create_time);
	149	fsinf->share_flags = tcon->share_flags;
	150	fsinf->share_caps = le32_to_cpu(tcon->capabilities);
	151	fsinf->sector_flags = tcon->ss_flags;
	152	fsinf->optimal_sector_size = tcon->perf_sector_size;
	153	fsinf->max_bytes_chunk = tcon->max_bytes_chunk;
	154	fsinf->maximal_access = tcon->maximal_access;
0de1f4c6 SF	155	fsinf->cifs_posix_caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
	156
	157	if (copy_to_user(arg, fsinf, sizeof(struct smb_mnt_fs_info)))
	158	rc = -EFAULT;
	159
	160	kfree(fsinf);
	161	return rc;
	162	}
	163
f9ddcca4	164	long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg)
1da177e4	165	{
496ad9aa	166	struct inode *inode = file_inode(filep);
1da177e4	167	int rc = -ENOTTY; /* strange error - but the precedent */
6d5786a3	168	unsigned int xid;
ba00ba64	169	struct cifsFileInfo *pSMBFile = filep->private_data;
96daf2b0	170	struct cifs_tcon *tcon;
f654bac2	171	__u64 ExtAttrBits = 0;
61876395	172	__u64 caps;
f654bac2	173
6d5786a3	174	xid = get_xid();
f654bac2	175
b0a752b5	176	cifs_dbg(FYI, "cifs ioctl 0x%x\n", command);
5fdae1f6	177	switch (command) {
36695673	178	case FS_IOC_GETFLAGS:
61876395 JL	179	if (pSMBFile == NULL)
	180	break;
	181	tcon = tlink_tcon(pSMBFile->tlink);
	182	caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
64a5cfa6	183	#ifdef CONFIG_CIFS_POSIX
5fdae1f6	184	if (CIFS_UNIX_EXTATTR_CAP & caps) {
f10d9ba4	185	__u64 ExtAttrMask = 0;
4b4de76e PS	186	rc = CIFSGetExtAttr(xid, tcon,
	187	pSMBFile->fid.netfid,
	188	&ExtAttrBits, &ExtAttrMask);
5fdae1f6	189	if (rc == 0)
f654bac2	190	rc = put_user(ExtAttrBits &
36695673	191	FS_FL_USER_VISIBLE,
f654bac2	192	(int __user *)arg);
64a5cfa6 SF	193	if (rc != EOPNOTSUPP)
	194	break;
	195	}
	196	#endif /* CONFIG_CIFS_POSIX */
	197	rc = 0;
	198	if (CIFS_I(inode)->cifsAttrs & ATTR_COMPRESSED) {
	199	/* add in the compressed bit */
	200	ExtAttrBits = FS_COMPR_FL;
	201	rc = put_user(ExtAttrBits & FS_FL_USER_VISIBLE,
	202	(int __user *)arg);
f654bac2 SF	203	}
f654bac2 SF	204	break;
36695673	205	case FS_IOC_SETFLAGS:
61876395 JL	206	if (pSMBFile == NULL)
	207	break;
	208	tcon = tlink_tcon(pSMBFile->tlink);
	209	caps = le64_to_cpu(tcon->fsUnixInfo.Capability);
64a5cfa6 SF	210
	211	if (get_user(ExtAttrBits, (int __user *)arg)) {
	212	rc = -EFAULT;
	213	break;
	214	}
	215
	216	/*
	217	* if (CIFS_UNIX_EXTATTR_CAP & caps)
	218	* rc = CIFSSetExtAttr(xid, tcon,
	219	* pSMBFile->fid.netfid,
	220	* extAttrBits,
	221	* &ExtAttrMask);
	222	* if (rc != EOPNOTSUPP)
	223	* break;
	224	*/
	225
	226	/* Currently only flag we can set is compressed flag */
	227	if ((ExtAttrBits & FS_COMPR_FL) == 0)
	228	break;
	229
	230	/* Try to set compress flag */
	231	if (tcon->ses->server->ops->set_compression) {
	232	rc = tcon->ses->server->ops->set_compression(
	233	xid, tcon, pSMBFile);
	234	cifs_dbg(FYI, "set compress flag rc %d\n", rc);
f654bac2	235	}
f654bac2	236	break;
f19e84df	237	case CIFS_IOC_COPYCHUNK_FILE:
312bbc59	238	rc = cifs_ioctl_copychunk(xid, filep, arg);
41c1358e	239	break;
f5b05d62 RS	240	case CIFS_QUERY_INFO:
	241	rc = cifs_ioctl_query_info(xid, filep, arg);
	242	break;
b3152e2c SF	243	case CIFS_IOC_SET_INTEGRITY:
	244	if (pSMBFile == NULL)
	245	break;
	246	tcon = tlink_tcon(pSMBFile->tlink);
	247	if (tcon->ses->server->ops->set_integrity)
	248	rc = tcon->ses->server->ops->set_integrity(xid,
	249	tcon, pSMBFile);
	250	else
	251	rc = -EOPNOTSUPP;
	252	break;
0de1f4c6	253	case CIFS_IOC_GET_MNT_INFO:
d8a6e505 DD	254	if (pSMBFile == NULL)
d8a6e505 DD	255	break;
0de1f4c6 SF	256	tcon = tlink_tcon(pSMBFile->tlink);
	257	rc = smb_mnt_get_fsinfo(xid, tcon, (void __user *)arg);
	258	break;
834170c8	259	case CIFS_ENUMERATE_SNAPSHOTS:
6026685d DD	260	if (pSMBFile == NULL)
6026685d DD	261	break;
834170c8 SF	262	if (arg == 0) {
	263	rc = -EINVAL;
	264	goto cifs_ioc_exit;
	265	}
	266	tcon = tlink_tcon(pSMBFile->tlink);
	267	if (tcon->ses->server->ops->enum_snapshots)
	268	rc = tcon->ses->server->ops->enum_snapshots(xid, tcon,
	269	pSMBFile, (void __user *)arg);
	270	else
	271	rc = -EOPNOTSUPP;
	272	break;
1da177e4	273	default:
f96637be	274	cifs_dbg(FYI, "unsupported ioctl\n");
f28ac91b	275	break;
1da177e4	276	}
834170c8	277	cifs_ioc_exit:
6d5786a3	278	free_xid(xid);
1da177e4	279	return rc;
5fdae1f6	280	}