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ocfs2: Implement ocfs2_reflink. 

Implement ocfs2_reflink.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
This commit is contained in:
Tao Ma 2009-09-21 10:38:17 +08:00 committed by Joel Becker
parent 0fe9b66c65
commit 09bf27a000
1 changed files with 123 additions and 0 deletions
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123
fs/ocfs2/refcounttree.c
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@ -33,6 +33,7 @@
#include "extent_map.h"
#include "aops.h"
#include "xattr.h"
#include "namei.h"
#include <linux/bio.h>
#include <linux/blkdev.h>
@ -4022,3 +4023,125 @@ out:
return ret;
}
static int __ocfs2_reflink(struct dentry *old_dentry,
struct buffer_head *old_bh,
struct inode *new_inode,
bool preserve)
{
int ret;
struct inode *inode = old_dentry->d_inode;
struct buffer_head *new_bh = NULL;
ret = filemap_fdatawrite(inode->i_mapping);
if (ret) {
mlog_errno(ret);
goto out;
}
ret = ocfs2_attach_refcount_tree(inode, old_bh);
if (ret) {
mlog_errno(ret);
goto out;
}
mutex_lock(&new_inode->i_mutex);
ret = ocfs2_inode_lock(new_inode, &new_bh, 1);
if (ret) {
mlog_errno(ret);
goto out_unlock;
}
ret = ocfs2_create_reflink_node(inode, old_bh,
new_inode, new_bh, preserve);
if (ret) {
mlog_errno(ret);
goto inode_unlock;
}
if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_XATTR_FL) {
ret = ocfs2_reflink_xattrs(inode, old_bh,
new_inode, new_bh,
preserve);
if (ret)
mlog_errno(ret);
}
inode_unlock:
ocfs2_inode_unlock(new_inode, 1);
brelse(new_bh);
out_unlock:
mutex_unlock(&new_inode->i_mutex);
out:
if (!ret) {
ret = filemap_fdatawait(inode->i_mapping);
if (ret)
mlog_errno(ret);
}
return ret;
}
static int ocfs2_reflink(struct dentry *old_dentry, struct inode *dir,
struct dentry *new_dentry, bool preserve)
{
int error;
struct inode *inode = old_dentry->d_inode;
struct buffer_head *old_bh = NULL;
struct inode *new_orphan_inode = NULL;
if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)))
return -EOPNOTSUPP;
error = ocfs2_create_inode_in_orphan(dir, inode->i_mode,
&new_orphan_inode);
if (error) {
mlog_errno(error);
goto out;
}
error = ocfs2_inode_lock(inode, &old_bh, 1);
if (error) {
mlog_errno(error);
goto out;
}
down_write(&OCFS2_I(inode)->ip_xattr_sem);
down_write(&OCFS2_I(inode)->ip_alloc_sem);
error = __ocfs2_reflink(old_dentry, old_bh,
new_orphan_inode, preserve);
up_write(&OCFS2_I(inode)->ip_alloc_sem);
up_write(&OCFS2_I(inode)->ip_xattr_sem);
ocfs2_inode_unlock(inode, 1);
brelse(old_bh);
if (error) {
mlog_errno(error);
goto out;
}
/* If the security isn't preserved, we need to re-initialize them. */
if (!preserve) {
error = ocfs2_init_security_and_acl(dir, new_orphan_inode);
if (error)
mlog_errno(error);
}
out:
if (!error) {
error = ocfs2_mv_orphaned_inode_to_new(dir, new_orphan_inode,
new_dentry);
if (error)
mlog_errno(error);
}
if (new_orphan_inode) {
/*
* We need to open_unlock the inode no matter whether we
* succeed or not, so that other nodes can delete it later.
*/
ocfs2_open_unlock(new_orphan_inode);
if (error)
iput(new_orphan_inode);
}
return error;
}