Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 236 insertions, 0 deletions

diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c
new file mode 100644
index 000000000..54f32f914
--- /dev/null
+++ b/fs/cifs/ioctl.c
@@ -0,0 +1,236 @@
+/*
+ *   fs/cifs/ioctl.c
+ *
+ *   vfs operations that deal with io control
+ *
+ *   Copyright (C) International Business Machines  Corp., 2005,2013
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   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 <linux/btrfs.h>
+
+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 cifs_sb_info *cifs_sb;
+	struct cifsFileInfo *pSMBFile = filep->private_data;
+	struct cifs_tcon *tcon;
+	__u64	ExtAttrBits = 0;
+	__u64   caps;
+
+	xid = get_xid();
+
+	cifs_sb = CIFS_SB(inode->i_sb);
+	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_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;
+}