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Diffstat (limited to 'fs/ocfs2/refcounttree.c')
-rw-r--r--fs/ocfs2/refcounttree.c113
1 files changed, 18 insertions, 95 deletions
diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index c7409578657b..dc66b80585ec 100644
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -4468,9 +4468,9 @@ out:
}
/* Update destination inode size, if necessary. */
-static int ocfs2_reflink_update_dest(struct inode *dest,
- struct buffer_head *d_bh,
- loff_t newlen)
+int ocfs2_reflink_update_dest(struct inode *dest,
+ struct buffer_head *d_bh,
+ loff_t newlen)
{
handle_t *handle;
int ret;
@@ -4621,13 +4621,13 @@ out:
}
/* Set up refcount tree and remap s_inode to t_inode. */
-static loff_t ocfs2_reflink_remap_blocks(struct inode *s_inode,
- struct buffer_head *s_bh,
- loff_t pos_in,
- struct inode *t_inode,
- struct buffer_head *t_bh,
- loff_t pos_out,
- loff_t len)
+loff_t ocfs2_reflink_remap_blocks(struct inode *s_inode,
+ struct buffer_head *s_bh,
+ loff_t pos_in,
+ struct inode *t_inode,
+ struct buffer_head *t_bh,
+ loff_t pos_out,
+ loff_t len)
{
struct ocfs2_cached_dealloc_ctxt dealloc;
struct ocfs2_super *osb;
@@ -4720,10 +4720,10 @@ out:
}
/* Lock an inode and grab a bh pointing to the inode. */
-static int ocfs2_reflink_inodes_lock(struct inode *s_inode,
- struct buffer_head **bh1,
- struct inode *t_inode,
- struct buffer_head **bh2)
+int ocfs2_reflink_inodes_lock(struct inode *s_inode,
+ struct buffer_head **bh1,
+ struct inode *t_inode,
+ struct buffer_head **bh2)
{
struct inode *inode1;
struct inode *inode2;
@@ -4808,10 +4808,10 @@ out_i1:
}
/* Unlock both inodes and release buffers. */
-static void ocfs2_reflink_inodes_unlock(struct inode *s_inode,
- struct buffer_head *s_bh,
- struct inode *t_inode,
- struct buffer_head *t_bh)
+void ocfs2_reflink_inodes_unlock(struct inode *s_inode,
+ struct buffer_head *s_bh,
+ struct inode *t_inode,
+ struct buffer_head *t_bh)
{
ocfs2_inode_unlock(s_inode, 1);
ocfs2_rw_unlock(s_inode, 1);
@@ -4823,80 +4823,3 @@ static void ocfs2_reflink_inodes_unlock(struct inode *s_inode,
}
unlock_two_nondirectories(s_inode, t_inode);
}
-
-/* Link a range of blocks from one file to another. */
-loff_t ocfs2_reflink_remap_range(struct file *file_in,
- loff_t pos_in,
- struct file *file_out,
- loff_t pos_out,
- loff_t len,
- unsigned int remap_flags)
-{
- struct inode *inode_in = file_inode(file_in);
- struct inode *inode_out = file_inode(file_out);
- struct ocfs2_super *osb = OCFS2_SB(inode_in->i_sb);
- struct buffer_head *in_bh = NULL, *out_bh = NULL;
- bool same_inode = (inode_in == inode_out);
- loff_t remapped = 0;
- ssize_t ret;
-
- if (!ocfs2_refcount_tree(osb))
- return -EOPNOTSUPP;
- if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
- return -EROFS;
-
- /* Lock both files against IO */
- ret = ocfs2_reflink_inodes_lock(inode_in, &in_bh, inode_out, &out_bh);
- if (ret)
- return ret;
-
- /* Check file eligibility and prepare for block sharing. */
- ret = -EINVAL;
- if ((OCFS2_I(inode_in)->ip_flags & OCFS2_INODE_SYSTEM_FILE) ||
- (OCFS2_I(inode_out)->ip_flags & OCFS2_INODE_SYSTEM_FILE))
- goto out_unlock;
-
- ret = generic_remap_file_range_prep(file_in, pos_in, file_out, pos_out,
- &len, remap_flags);
- if (ret < 0 || len == 0)
- goto out_unlock;
-
- /* Lock out changes to the allocation maps and remap. */
- down_write(&OCFS2_I(inode_in)->ip_alloc_sem);
- if (!same_inode)
- down_write_nested(&OCFS2_I(inode_out)->ip_alloc_sem,
- SINGLE_DEPTH_NESTING);
-
- /* Zap any page cache for the destination file's range. */
- truncate_inode_pages_range(&inode_out->i_data,
- round_down(pos_out, PAGE_SIZE),
- round_up(pos_out + len, PAGE_SIZE) - 1);
-
- remapped = ocfs2_reflink_remap_blocks(inode_in, in_bh, pos_in,
- inode_out, out_bh, pos_out, len);
- up_write(&OCFS2_I(inode_in)->ip_alloc_sem);
- if (!same_inode)
- up_write(&OCFS2_I(inode_out)->ip_alloc_sem);
- if (remapped < 0) {
- ret = remapped;
- mlog_errno(ret);
- goto out_unlock;
- }
-
- /*
- * Empty the extent map so that we may get the right extent
- * record from the disk.
- */
- ocfs2_extent_map_trunc(inode_in, 0);
- ocfs2_extent_map_trunc(inode_out, 0);
-
- ret = ocfs2_reflink_update_dest(inode_out, out_bh, pos_out + len);
- if (ret) {
- mlog_errno(ret);
- goto out_unlock;
- }
-
-out_unlock:
- ocfs2_reflink_inodes_unlock(inode_in, in_bh, inode_out, out_bh);
- return remapped > 0 ? remapped : ret;
-}