ocfs2: remove ocfs2_reflink_remap_range
Since ocfs2_remap_file_range is a thin shell around ocfs2_remap_remap_range, move everything from the latter into the former. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Darrick J. Wong
Dave Chinner
Родитель
900611a1bd
Коммит
65f098e91f
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@ -2531,11 +2531,75 @@ static loff_t ocfs2_remap_file_range(struct file *file_in, loff_t pos_in,
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struct file *file_out, loff_t pos_out,
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loff_t len, unsigned int remap_flags)
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{
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struct inode *inode_in = file_inode(file_in);
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struct inode *inode_out = file_inode(file_out);
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struct ocfs2_super *osb = OCFS2_SB(inode_in->i_sb);
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struct buffer_head *in_bh = NULL, *out_bh = NULL;
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bool same_inode = (inode_in == inode_out);
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loff_t remapped = 0;
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ssize_t ret;
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if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY))
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return -EINVAL;
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if (!ocfs2_refcount_tree(osb))
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return -EOPNOTSUPP;
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if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
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return -EROFS;
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return ocfs2_reflink_remap_range(file_in, pos_in, file_out, pos_out,
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len, remap_flags);
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/* Lock both files against IO */
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ret = ocfs2_reflink_inodes_lock(inode_in, &in_bh, inode_out, &out_bh);
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if (ret)
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return ret;
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/* Check file eligibility and prepare for block sharing. */
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ret = -EINVAL;
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if ((OCFS2_I(inode_in)->ip_flags & OCFS2_INODE_SYSTEM_FILE) ||
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(OCFS2_I(inode_out)->ip_flags & OCFS2_INODE_SYSTEM_FILE))
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goto out_unlock;
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ret = generic_remap_file_range_prep(file_in, pos_in, file_out, pos_out,
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&len, remap_flags);
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if (ret < 0 || len == 0)
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goto out_unlock;
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/* Lock out changes to the allocation maps and remap. */
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down_write(&OCFS2_I(inode_in)->ip_alloc_sem);
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if (!same_inode)
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down_write_nested(&OCFS2_I(inode_out)->ip_alloc_sem,
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SINGLE_DEPTH_NESTING);
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/* Zap any page cache for the destination file's range. */
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truncate_inode_pages_range(&inode_out->i_data,
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round_down(pos_out, PAGE_SIZE),
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round_up(pos_out + len, PAGE_SIZE) - 1);
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remapped = ocfs2_reflink_remap_blocks(inode_in, in_bh, pos_in,
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inode_out, out_bh, pos_out, len);
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up_write(&OCFS2_I(inode_in)->ip_alloc_sem);
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if (!same_inode)
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up_write(&OCFS2_I(inode_out)->ip_alloc_sem);
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if (remapped < 0) {
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ret = remapped;
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mlog_errno(ret);
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goto out_unlock;
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}
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/*
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* Empty the extent map so that we may get the right extent
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* record from the disk.
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*/
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ocfs2_extent_map_trunc(inode_in, 0);
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ocfs2_extent_map_trunc(inode_out, 0);
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ret = ocfs2_reflink_update_dest(inode_out, out_bh, pos_out + len);
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if (ret) {
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mlog_errno(ret);
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goto out_unlock;
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}
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out_unlock:
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ocfs2_reflink_inodes_unlock(inode_in, in_bh, inode_out, out_bh);
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return remapped > 0 ? remapped : ret;
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}
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const struct inode_operations ocfs2_file_iops = {
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@ -4468,9 +4468,9 @@ out:
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}
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/* Update destination inode size, if necessary. */
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static int ocfs2_reflink_update_dest(struct inode *dest,
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struct buffer_head *d_bh,
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loff_t newlen)
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int ocfs2_reflink_update_dest(struct inode *dest,
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struct buffer_head *d_bh,
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loff_t newlen)
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{
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handle_t *handle;
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int ret;
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@ -4621,13 +4621,13 @@ out:
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}
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/* Set up refcount tree and remap s_inode to t_inode. */
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static loff_t ocfs2_reflink_remap_blocks(struct inode *s_inode,
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struct buffer_head *s_bh,
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loff_t pos_in,
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struct inode *t_inode,
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struct buffer_head *t_bh,
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loff_t pos_out,
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loff_t len)
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loff_t ocfs2_reflink_remap_blocks(struct inode *s_inode,
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struct buffer_head *s_bh,
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loff_t pos_in,
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struct inode *t_inode,
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struct buffer_head *t_bh,
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loff_t pos_out,
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loff_t len)
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{
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struct ocfs2_cached_dealloc_ctxt dealloc;
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struct ocfs2_super *osb;
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@ -4720,10 +4720,10 @@ out:
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}
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/* Lock an inode and grab a bh pointing to the inode. */
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static int ocfs2_reflink_inodes_lock(struct inode *s_inode,
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struct buffer_head **bh1,
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struct inode *t_inode,
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struct buffer_head **bh2)
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int ocfs2_reflink_inodes_lock(struct inode *s_inode,
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struct buffer_head **bh1,
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struct inode *t_inode,
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struct buffer_head **bh2)
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{
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struct inode *inode1;
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struct inode *inode2;
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@ -4808,10 +4808,10 @@ out_i1:
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}
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/* Unlock both inodes and release buffers. */
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static void ocfs2_reflink_inodes_unlock(struct inode *s_inode,
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struct buffer_head *s_bh,
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struct inode *t_inode,
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struct buffer_head *t_bh)
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void ocfs2_reflink_inodes_unlock(struct inode *s_inode,
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struct buffer_head *s_bh,
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struct inode *t_inode,
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struct buffer_head *t_bh)
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{
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ocfs2_inode_unlock(s_inode, 1);
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ocfs2_rw_unlock(s_inode, 1);
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@ -4823,80 +4823,3 @@ static void ocfs2_reflink_inodes_unlock(struct inode *s_inode,
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}
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unlock_two_nondirectories(s_inode, t_inode);
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}
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/* Link a range of blocks from one file to another. */
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loff_t ocfs2_reflink_remap_range(struct file *file_in,
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loff_t pos_in,
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struct file *file_out,
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loff_t pos_out,
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loff_t len,
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unsigned int remap_flags)
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{
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struct inode *inode_in = file_inode(file_in);
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struct inode *inode_out = file_inode(file_out);
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struct ocfs2_super *osb = OCFS2_SB(inode_in->i_sb);
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struct buffer_head *in_bh = NULL, *out_bh = NULL;
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bool same_inode = (inode_in == inode_out);
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loff_t remapped = 0;
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ssize_t ret;
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if (!ocfs2_refcount_tree(osb))
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return -EOPNOTSUPP;
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if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
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return -EROFS;
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/* Lock both files against IO */
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ret = ocfs2_reflink_inodes_lock(inode_in, &in_bh, inode_out, &out_bh);
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if (ret)
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return ret;
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/* Check file eligibility and prepare for block sharing. */
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ret = -EINVAL;
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if ((OCFS2_I(inode_in)->ip_flags & OCFS2_INODE_SYSTEM_FILE) ||
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(OCFS2_I(inode_out)->ip_flags & OCFS2_INODE_SYSTEM_FILE))
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goto out_unlock;
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ret = generic_remap_file_range_prep(file_in, pos_in, file_out, pos_out,
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&len, remap_flags);
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if (ret < 0 || len == 0)
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goto out_unlock;
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/* Lock out changes to the allocation maps and remap. */
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down_write(&OCFS2_I(inode_in)->ip_alloc_sem);
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if (!same_inode)
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down_write_nested(&OCFS2_I(inode_out)->ip_alloc_sem,
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SINGLE_DEPTH_NESTING);
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/* Zap any page cache for the destination file's range. */
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truncate_inode_pages_range(&inode_out->i_data,
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round_down(pos_out, PAGE_SIZE),
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round_up(pos_out + len, PAGE_SIZE) - 1);
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remapped = ocfs2_reflink_remap_blocks(inode_in, in_bh, pos_in,
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inode_out, out_bh, pos_out, len);
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up_write(&OCFS2_I(inode_in)->ip_alloc_sem);
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if (!same_inode)
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up_write(&OCFS2_I(inode_out)->ip_alloc_sem);
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if (remapped < 0) {
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ret = remapped;
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mlog_errno(ret);
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goto out_unlock;
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}
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/*
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* Empty the extent map so that we may get the right extent
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* record from the disk.
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*/
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ocfs2_extent_map_trunc(inode_in, 0);
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ocfs2_extent_map_trunc(inode_out, 0);
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ret = ocfs2_reflink_update_dest(inode_out, out_bh, pos_out + len);
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if (ret) {
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mlog_errno(ret);
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goto out_unlock;
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}
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out_unlock:
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ocfs2_reflink_inodes_unlock(inode_in, in_bh, inode_out, out_bh);
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return remapped > 0 ? remapped : ret;
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}
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@ -115,11 +115,23 @@ int ocfs2_reflink_ioctl(struct inode *inode,
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const char __user *oldname,
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const char __user *newname,
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bool preserve);
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loff_t ocfs2_reflink_remap_range(struct file *file_in,
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loff_t pos_in,
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struct file *file_out,
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loff_t pos_out,
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loff_t len,
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unsigned int remap_flags);
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loff_t ocfs2_reflink_remap_blocks(struct inode *s_inode,
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struct buffer_head *s_bh,
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loff_t pos_in,
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struct inode *t_inode,
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struct buffer_head *t_bh,
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loff_t pos_out,
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loff_t len);
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int ocfs2_reflink_inodes_lock(struct inode *s_inode,
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struct buffer_head **bh1,
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struct inode *t_inode,
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struct buffer_head **bh2);
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void ocfs2_reflink_inodes_unlock(struct inode *s_inode,
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struct buffer_head *s_bh,
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struct inode *t_inode,
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struct buffer_head *t_bh);
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int ocfs2_reflink_update_dest(struct inode *dest,
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struct buffer_head *d_bh,
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loff_t newlen);
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#endif /* OCFS2_REFCOUNTTREE_H */
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