#include "cifs_ioctl.h"
#include <linux/btrfs.h>
-static long cifs_ioctl_clone(unsigned int xid, struct file *dst_file,
- unsigned long srcfd, u64 off, u64 len, u64 destoff,
- bool dup_extents)
+static int cifs_file_clone_range(unsigned int xid, struct file *src_file,
+ struct file *dst_file)
{
- int rc;
- struct cifsFileInfo *smb_file_target = dst_file->private_data;
+ struct inode *src_inode = file_inode(src_file);
struct inode *target_inode = file_inode(dst_file);
- struct cifs_tcon *target_tcon;
- struct fd src_file;
struct cifsFileInfo *smb_file_src;
- struct inode *src_inode;
+ struct cifsFileInfo *smb_file_target;
struct cifs_tcon *src_tcon;
+ struct cifs_tcon *target_tcon;
+ int rc;
cifs_dbg(FYI, "ioctl clone 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;
- }
-
- if ((!src_file.file->private_data) || (!dst_file->private_data)) {
+ if (!src_file->private_data || !dst_file->private_data) {
rc = -EBADF;
cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
- goto out_fput;
+ goto out;
}
rc = -EXDEV;
smb_file_target = dst_file->private_data;
- smb_file_src = src_file.file->private_data;
+ smb_file_src = src_file->private_data;
src_tcon = tlink_tcon(smb_file_src->tlink);
target_tcon = tlink_tcon(smb_file_target->tlink);
- /* check source and target on same server (or volume if dup_extents) */
- if (dup_extents && (src_tcon != target_tcon)) {
- cifs_dbg(VFS, "source and target of copy not on same share\n");
- goto out_fput;
- }
-
- if (!dup_extents && (src_tcon->ses != target_tcon->ses)) {
+ if (src_tcon->ses != target_tcon->ses) {
cifs_dbg(VFS, "source and target of copy not on same server\n");
- goto out_fput;
+ goto out;
}
- src_inode = file_inode(src_file.file);
- rc = -EINVAL;
- if (S_ISDIR(src_inode->i_mode))
- goto out_fput;
-
/*
* Note: cifs case is easier than btrfs since server responsible for
* checks for proper open modes and file type and if it wants
*/
lock_two_nondirectories(target_inode, src_inode);
- /* determine range to clone */
- rc = -EINVAL;
- if (off + len > src_inode->i_size || off + len < off)
- goto out_unlock;
- if (len == 0)
- len = src_inode->i_size - off;
-
cifs_dbg(FYI, "about to flush pages\n");
/* should we flush first and last page first */
- truncate_inode_pages_range(&target_inode->i_data, destoff,
- PAGE_CACHE_ALIGN(destoff + len)-1);
+ truncate_inode_pages(&target_inode->i_data, 0);
- if (dup_extents && target_tcon->ses->server->ops->duplicate_extents)
- rc = target_tcon->ses->server->ops->duplicate_extents(xid,
- smb_file_src, smb_file_target, off, len, destoff);
- else if (!dup_extents && target_tcon->ses->server->ops->clone_range)
+ if (target_tcon->ses->server->ops->clone_range)
rc = target_tcon->ses->server->ops->clone_range(xid,
- smb_file_src, smb_file_target, off, len, destoff);
+ smb_file_src, smb_file_target, 0, src_inode->i_size, 0);
else
rc = -EOPNOTSUPP;
/* force revalidate of size and timestamps of target file now
that target is updated on the server */
CIFS_I(target_inode)->time = 0;
-out_unlock:
/* although unlocking in the reverse order from locking is not
strictly necessary here it is a little cleaner to be consistent */
unlock_two_nondirectories(src_inode, target_inode);
+out:
+ return rc;
+}
+
+static long cifs_ioctl_clone(unsigned int xid, struct file *dst_file,
+ unsigned long srcfd)
+{
+ int rc;
+ struct fd src_file;
+ struct inode *src_inode;
+
+ cifs_dbg(FYI, "ioctl clone 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_clone_range(xid, src_file.file, dst_file);
+
out_fput:
fdput(src_file);
out_drop_write:
}
break;
case CIFS_IOC_COPYCHUNK_FILE:
- rc = cifs_ioctl_clone(xid, filep, arg, 0, 0, 0, false);
- break;
- case BTRFS_IOC_CLONE:
- rc = cifs_ioctl_clone(xid, filep, arg, 0, 0, 0, true);
+ rc = cifs_ioctl_clone(xid, filep, arg);
break;
case CIFS_IOC_SET_INTEGRITY:
if (pSMBFile == NULL)
projects / karo-tx-linux.git / blobdiff