errcode_t ocfs2_get_clusters(ocfs2_cached_inode *cinode,
uint32_t v_cluster,
uint32_t *p_cluster,
uint32_t *num_clusters,
uint16_t *extent_flags)
{
int i;
uint16_t flags = 0;
errcode_t ret = 0;
ocfs2_filesys *fs = cinode->ci_fs;
struct ocfs2_dinode *di;
struct ocfs2_extent_block *eb;
struct ocfs2_extent_list *el;
struct ocfs2_extent_rec *rec;
char *eb_buf = NULL;
uint32_t coff;
di = cinode->ci_inode;
el = &di->id2.i_list;
if (el->l_tree_depth) {
ret = ocfs2_find_leaf(fs, di, v_cluster, &eb_buf);
if (ret)
goto out;
eb = (struct ocfs2_extent_block *) eb_buf;
el = &eb->h_list;
if (el->l_tree_depth) {
ret = OCFS2_ET_CORRUPT_EXTENT_BLOCK;
goto out;
}
}
i = ocfs2_search_extent_list(el, v_cluster);
if (i == -1) {
/*
* A hole was found. Return some canned values that
* callers can key on. If asked for, num_clusters will
* be populated with the size of the hole.
*/
*p_cluster = 0;
if (num_clusters) {
ret = ocfs2_figure_hole_clusters(cinode, el, eb_buf,
v_cluster,
num_clusters);
if (ret)
goto out;
}
} else {
rec = &el->l_recs[i];
assert(v_cluster >= rec->e_cpos);
if (!rec->e_blkno) {
ret = OCFS2_ET_BAD_BLKNO;
goto out;
}
coff = v_cluster - rec->e_cpos;
*p_cluster = ocfs2_blocks_to_clusters(fs, rec->e_blkno);
*p_cluster = *p_cluster + coff;
if (num_clusters)
*num_clusters = ocfs2_rec_clusters(el->l_tree_depth,
rec) - coff;
flags = rec->e_flags;
}
if (extent_flags)
*extent_flags = flags;
out:
if (eb_buf)
ocfs2_free(&eb_buf);
return ret;
}
static int __ocfs2_move_extent(handle_t *handle,
struct ocfs2_move_extents_context *context,
u32 cpos, u32 len, u32 p_cpos, u32 new_p_cpos,
int ext_flags)
{
int ret = 0, index;
struct inode *inode = context->inode;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
struct ocfs2_extent_rec *rec, replace_rec;
struct ocfs2_path *path = NULL;
struct ocfs2_extent_list *el;
u64 ino = ocfs2_metadata_cache_owner(context->et.et_ci);
u64 old_blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cpos);
ret = ocfs2_duplicate_clusters_by_page(handle, inode, cpos,
p_cpos, new_p_cpos, len);
if (ret) {
mlog_errno(ret);
goto out;
}
memset(&replace_rec, 0, sizeof(replace_rec));
replace_rec.e_cpos = cpu_to_le32(cpos);
replace_rec.e_leaf_clusters = cpu_to_le16(len);
replace_rec.e_blkno = cpu_to_le64(ocfs2_clusters_to_blocks(inode->i_sb,
new_p_cpos));
path = ocfs2_new_path_from_et(&context->et);
if (!path) {
ret = -ENOMEM;
mlog_errno(ret);
goto out;
}
ret = ocfs2_find_path(INODE_CACHE(inode), path, cpos);
if (ret) {
mlog_errno(ret);
goto out;
}
el = path_leaf_el(path);
index = ocfs2_search_extent_list(el, cpos);
if (index == -1) {
ret = ocfs2_error(inode->i_sb,
"Inode %llu has an extent at cpos %u which can no longer be found\n",
(unsigned long long)ino, cpos);
goto out;
}
rec = &el->l_recs[index];
BUG_ON(ext_flags != rec->e_flags);
/*
* after moving/defraging to new location, the extent is not going
* to be refcounted anymore.
*/
replace_rec.e_flags = ext_flags & ~OCFS2_EXT_REFCOUNTED;
ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
context->et.et_root_bh,
OCFS2_JOURNAL_ACCESS_WRITE);
if (ret) {
mlog_errno(ret);
goto out;
}
ret = ocfs2_split_extent(handle, &context->et, path, index,
&replace_rec, context->meta_ac,
&context->dealloc);
if (ret) {
mlog_errno(ret);
goto out;
}
ocfs2_journal_dirty(handle, context->et.et_root_bh);
context->new_phys_cpos = new_p_cpos;
/*
* need I to append truncate log for old clusters?
*/
if (old_blkno) {
if (ext_flags & OCFS2_EXT_REFCOUNTED)
ret = ocfs2_decrease_refcount(inode, handle,
ocfs2_blocks_to_clusters(osb->sb,
old_blkno),
len, context->meta_ac,
&context->dealloc, 1);
else
ret = ocfs2_truncate_log_append(osb, handle,
old_blkno, len);
}
ocfs2_update_inode_fsync_trans(handle, inode, 0);
out:
ocfs2_free_path(path);
return ret;
}
errcode_t ocfs2_xattr_get_clusters(ocfs2_filesys *fs,
struct ocfs2_extent_list *el,
uint64_t el_blkno,
char *el_blk,
uint32_t v_cluster,
uint32_t *p_cluster,
uint32_t *num_clusters,
uint16_t *extent_flags)
{
int i;
errcode_t ret = 0;
struct ocfs2_extent_block *eb;
struct ocfs2_extent_rec *rec;
char *eb_buf = NULL;
uint32_t coff;
if (el->l_tree_depth) {
ret = ocfs2_tree_find_leaf(fs, el, el_blkno, el_blk,
v_cluster, &eb_buf);
if (ret)
goto out;
eb = (struct ocfs2_extent_block *)eb_buf;
el = &eb->h_list;
if (el->l_tree_depth) {
ret = OCFS2_ET_CORRUPT_EXTENT_BLOCK;
goto out;
}
}
i = ocfs2_search_extent_list(el, v_cluster);
if (i == -1) {
ret = -1;
goto out;
} else {
rec = &el->l_recs[i];
assert(v_cluster >= rec->e_cpos);
if (!rec->e_blkno) {
ret = OCFS2_ET_BAD_BLKNO;
goto out;
}
coff = v_cluster - rec->e_cpos;
*p_cluster = ocfs2_blocks_to_clusters(fs, rec->e_blkno);
*p_cluster = *p_cluster + coff;
if (num_clusters)
*num_clusters = ocfs2_rec_clusters(el->l_tree_depth,
rec) - coff;
if (extent_flags)
*extent_flags = rec->e_flags;
}
out:
if (eb_buf)
ocfs2_free(&eb_buf);
return ret;
}
