mirror of https://gitee.com/openkylin/linux.git
ocfs2: Add reflink support for xattr.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
This commit is contained in:
Tao Ma
Joel Becker
parent
a7fe7a3a1a
commit
2999d12f4d
|
|
@ -1894,7 +1894,7 @@ static int ocfs2_split_refcount_rec(handle_t *handle,
|
|||
return ret;
|
||||
}
|
||||
|
||||
static int __ocfs2_increase_refcount(handle_t *handle,
|
||||
int ocfs2_increase_refcount(handle_t *handle,
|
||||
struct ocfs2_caching_info *ci,
|
||||
struct buffer_head *ref_root_bh,
|
||||
u64 cpos, u32 len,
|
||||
|
|
@ -3631,7 +3631,7 @@ int ocfs2_add_refcount_flag(struct inode *inode,
|
|||
goto out_commit;
|
||||
}
|
||||
|
||||
ret = __ocfs2_increase_refcount(handle, ref_ci, ref_root_bh,
|
||||
ret = ocfs2_increase_refcount(handle, ref_ci, ref_root_bh,
|
||||
p_cluster, num_clusters,
|
||||
meta_ac, dealloc);
|
||||
if (ret) {
|
||||
|
|
@ -3822,7 +3822,7 @@ static int ocfs2_add_refcounted_extent(struct inode *inode,
|
|||
goto out_commit;
|
||||
}
|
||||
|
||||
ret = __ocfs2_increase_refcount(handle, ref_ci, ref_root_bh,
|
||||
ret = ocfs2_increase_refcount(handle, ref_ci, ref_root_bh,
|
||||
p_cluster, num_clusters,
|
||||
meta_ac, dealloc);
|
||||
if (ret)
|
||||
|
|
|
|||
|
|
@ -93,4 +93,10 @@ int ocfs2_add_refcount_flag(struct inode *inode,
|
|||
int ocfs2_remove_refcount_tree(struct inode *inode, struct buffer_head *di_bh);
|
||||
int ocfs2_try_remove_refcount_tree(struct inode *inode,
|
||||
struct buffer_head *di_bh);
|
||||
int ocfs2_increase_refcount(handle_t *handle,
|
||||
struct ocfs2_caching_info *ci,
|
||||
struct buffer_head *ref_root_bh,
|
||||
u64 cpos, u32 len,
|
||||
struct ocfs2_alloc_context *meta_ac,
|
||||
struct ocfs2_cached_dealloc_ctxt *dealloc);
|
||||
#endif /* OCFS2_REFCOUNTTREE_H */
|
||||
|
|
|
|||
923
fs/ocfs2/xattr.c
923
fs/ocfs2/xattr.c
|
|
@ -5876,6 +5876,929 @@ int ocfs2_xattr_attach_refcount_tree(struct inode *inode,
|
|||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* Store the information we need in xattr reflink.
|
||||
* old_bh and new_bh are inode bh for the old and new inode.
|
||||
*/
|
||||
struct ocfs2_xattr_reflink {
|
||||
struct inode *old_inode;
|
||||
struct inode *new_inode;
|
||||
struct buffer_head *old_bh;
|
||||
struct buffer_head *new_bh;
|
||||
struct ocfs2_caching_info *ref_ci;
|
||||
struct buffer_head *ref_root_bh;
|
||||
struct ocfs2_cached_dealloc_ctxt *dealloc;
|
||||
};
|
||||
|
||||
/*
|
||||
* Given a xattr header and xe offset,
|
||||
* return the proper xv and the corresponding bh.
|
||||
* xattr in inode, block and xattr tree have different implementaions.
|
||||
*/
|
||||
typedef int (get_xattr_value_root)(struct super_block *sb,
|
||||
struct buffer_head *bh,
|
||||
struct ocfs2_xattr_header *xh,
|
||||
int offset,
|
||||
struct ocfs2_xattr_value_root **xv,
|
||||
struct buffer_head **ret_bh,
|
||||
void *para);
|
||||
|
||||
/*
|
||||
* Calculate all the xattr value root metadata stored in this xattr header and
|
||||
* credits we need if we create them from the scratch.
|
||||
* We use get_xattr_value_root so that all types of xattr container can use it.
|
||||
*/
|
||||
static int ocfs2_value_metas_in_xattr_header(struct super_block *sb,
|
||||
struct buffer_head *bh,
|
||||
struct ocfs2_xattr_header *xh,
|
||||
int *metas, int *credits,
|
||||
int *num_recs,
|
||||
get_xattr_value_root *func,
|
||||
void *para)
|
||||
{
|
||||
int i, ret = 0;
|
||||
struct ocfs2_xattr_value_root *xv;
|
||||
struct ocfs2_xattr_entry *xe;
|
||||
|
||||
for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
|
||||
xe = &xh->xh_entries[i];
|
||||
if (ocfs2_xattr_is_local(xe))
|
||||
continue;
|
||||
|
||||
ret = func(sb, bh, xh, i, &xv, NULL, para);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
break;
|
||||
}
|
||||
|
||||
*metas += le16_to_cpu(xv->xr_list.l_tree_depth) *
|
||||
le16_to_cpu(xv->xr_list.l_next_free_rec);
|
||||
|
||||
*credits += ocfs2_calc_extend_credits(sb,
|
||||
&def_xv.xv.xr_list,
|
||||
le32_to_cpu(xv->xr_clusters));
|
||||
|
||||
/*
|
||||
* If the value is a tree with depth > 1, We don't go deep
|
||||
* to the extent block, so just calculate a maximum record num.
|
||||
*/
|
||||
if (!xv->xr_list.l_tree_depth)
|
||||
*num_recs += xv->xr_list.l_next_free_rec;
|
||||
else
|
||||
*num_recs += ocfs2_clusters_for_bytes(sb,
|
||||
XATTR_SIZE_MAX);
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Used by xattr inode and block to return the right xv and buffer_head. */
|
||||
static int ocfs2_get_xattr_value_root(struct super_block *sb,
|
||||
struct buffer_head *bh,
|
||||
struct ocfs2_xattr_header *xh,
|
||||
int offset,
|
||||
struct ocfs2_xattr_value_root **xv,
|
||||
struct buffer_head **ret_bh,
|
||||
void *para)
|
||||
{
|
||||
struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset];
|
||||
|
||||
*xv = (struct ocfs2_xattr_value_root *)((void *)xh +
|
||||
le16_to_cpu(xe->xe_name_offset) +
|
||||
OCFS2_XATTR_SIZE(xe->xe_name_len));
|
||||
|
||||
if (ret_bh)
|
||||
*ret_bh = bh;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Lock the meta_ac and caculate how much credits we need for reflink xattrs.
|
||||
* It is only used for inline xattr and xattr block.
|
||||
*/
|
||||
static int ocfs2_reflink_lock_xattr_allocators(struct ocfs2_super *osb,
|
||||
struct ocfs2_xattr_header *xh,
|
||||
struct buffer_head *ref_root_bh,
|
||||
int *credits,
|
||||
struct ocfs2_alloc_context **meta_ac)
|
||||
{
|
||||
int ret, meta_add = 0, num_recs = 0;
|
||||
struct ocfs2_refcount_block *rb =
|
||||
(struct ocfs2_refcount_block *)ref_root_bh->b_data;
|
||||
|
||||
*credits = 0;
|
||||
|
||||
ret = ocfs2_value_metas_in_xattr_header(osb->sb, NULL, xh,
|
||||
&meta_add, credits, &num_recs,
|
||||
ocfs2_get_xattr_value_root,
|
||||
NULL);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
/*
|
||||
* We need to add/modify num_recs in refcount tree, so just calculate
|
||||
* an approximate number we need for refcount tree change.
|
||||
* Sometimes we need to split the tree, and after split, half recs
|
||||
* will be moved to the new block, and a new block can only provide
|
||||
* half number of recs. So we multiple new blocks by 2.
|
||||
*/
|
||||
num_recs = num_recs / ocfs2_refcount_recs_per_rb(osb->sb) * 2;
|
||||
meta_add += num_recs;
|
||||
*credits += num_recs + num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS;
|
||||
if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL)
|
||||
*credits += le16_to_cpu(rb->rf_list.l_tree_depth) *
|
||||
le16_to_cpu(rb->rf_list.l_next_free_rec) + 1;
|
||||
else
|
||||
*credits += 1;
|
||||
|
||||
ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, meta_ac);
|
||||
if (ret)
|
||||
mlog_errno(ret);
|
||||
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* Given a xattr header, reflink all the xattrs in this container.
|
||||
* It can be used for inode, block and bucket.
|
||||
*
|
||||
* NOTE:
|
||||
* Before we call this function, the caller has memcpy the xattr in
|
||||
* old_xh to the new_xh.
|
||||
*/
|
||||
static int ocfs2_reflink_xattr_header(handle_t *handle,
|
||||
struct ocfs2_xattr_reflink *args,
|
||||
struct buffer_head *old_bh,
|
||||
struct ocfs2_xattr_header *xh,
|
||||
struct buffer_head *new_bh,
|
||||
struct ocfs2_xattr_header *new_xh,
|
||||
struct ocfs2_xattr_value_buf *vb,
|
||||
struct ocfs2_alloc_context *meta_ac,
|
||||
get_xattr_value_root *func,
|
||||
void *para)
|
||||
{
|
||||
int ret = 0, i;
|
||||
struct super_block *sb = args->old_inode->i_sb;
|
||||
struct buffer_head *value_bh;
|
||||
struct ocfs2_xattr_entry *xe;
|
||||
struct ocfs2_xattr_value_root *xv, *new_xv;
|
||||
struct ocfs2_extent_tree data_et;
|
||||
u32 clusters, cpos, p_cluster, num_clusters;
|
||||
unsigned int ext_flags = 0;
|
||||
|
||||
mlog(0, "reflink xattr in container %llu, count = %u\n",
|
||||
(unsigned long long)old_bh->b_blocknr, le16_to_cpu(xh->xh_count));
|
||||
for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
|
||||
xe = &xh->xh_entries[i];
|
||||
|
||||
if (ocfs2_xattr_is_local(xe))
|
||||
continue;
|
||||
|
||||
ret = func(sb, old_bh, xh, i, &xv, NULL, para);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
break;
|
||||
}
|
||||
|
||||
ret = func(sb, new_bh, new_xh, i, &new_xv, &value_bh, para);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* For the xattr which has l_tree_depth = 0, all the extent
|
||||
* recs have already be copied to the new xh with the
|
||||
* propriate OCFS2_EXT_REFCOUNTED flag we just need to
|
||||
* increase the refount count int the refcount tree.
|
||||
*
|
||||
* For the xattr which has l_tree_depth > 0, we need
|
||||
* to initialize it to the empty default value root,
|
||||
* and then insert the extents one by one.
|
||||
*/
|
||||
if (xv->xr_list.l_tree_depth) {
|
||||
memcpy(new_xv, &def_xv, sizeof(def_xv));
|
||||
vb->vb_xv = new_xv;
|
||||
vb->vb_bh = value_bh;
|
||||
ocfs2_init_xattr_value_extent_tree(&data_et,
|
||||
INODE_CACHE(args->new_inode), vb);
|
||||
}
|
||||
|
||||
clusters = le32_to_cpu(xv->xr_clusters);
|
||||
cpos = 0;
|
||||
while (cpos < clusters) {
|
||||
ret = ocfs2_xattr_get_clusters(args->old_inode,
|
||||
cpos,
|
||||
&p_cluster,
|
||||
&num_clusters,
|
||||
&xv->xr_list,
|
||||
&ext_flags);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
BUG_ON(!p_cluster);
|
||||
|
||||
if (xv->xr_list.l_tree_depth) {
|
||||
ret = ocfs2_insert_extent(handle,
|
||||
&data_et, cpos,
|
||||
ocfs2_clusters_to_blocks(
|
||||
args->old_inode->i_sb,
|
||||
p_cluster),
|
||||
num_clusters, ext_flags,
|
||||
meta_ac);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
ret = ocfs2_increase_refcount(handle, args->ref_ci,
|
||||
args->ref_root_bh,
|
||||
p_cluster, num_clusters,
|
||||
meta_ac, args->dealloc);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
cpos += num_clusters;
|
||||
}
|
||||
}
|
||||
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int ocfs2_reflink_xattr_inline(struct ocfs2_xattr_reflink *args)
|
||||
{
|
||||
int ret = 0, credits = 0;
|
||||
handle_t *handle;
|
||||
struct ocfs2_super *osb = OCFS2_SB(args->old_inode->i_sb);
|
||||
struct ocfs2_dinode *di = (struct ocfs2_dinode *)args->old_bh->b_data;
|
||||
int inline_size = le16_to_cpu(di->i_xattr_inline_size);
|
||||
int header_off = osb->sb->s_blocksize - inline_size;
|
||||
struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)
|
||||
(args->old_bh->b_data + header_off);
|
||||
struct ocfs2_xattr_header *new_xh = (struct ocfs2_xattr_header *)
|
||||
(args->new_bh->b_data + header_off);
|
||||
struct ocfs2_alloc_context *meta_ac = NULL;
|
||||
struct ocfs2_inode_info *new_oi;
|
||||
struct ocfs2_dinode *new_di;
|
||||
struct ocfs2_xattr_value_buf vb = {
|
||||
.vb_bh = args->new_bh,
|
||||
.vb_access = ocfs2_journal_access_di,
|
||||
};
|
||||
|
||||
ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh,
|
||||
&credits, &meta_ac);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
handle = ocfs2_start_trans(osb, credits);
|
||||
if (IS_ERR(handle)) {
|
||||
ret = PTR_ERR(handle);
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
ret = ocfs2_journal_access_di(handle, INODE_CACHE(args->new_inode),
|
||||
args->new_bh, OCFS2_JOURNAL_ACCESS_WRITE);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
goto out_commit;
|
||||
}
|
||||
|
||||
memcpy(args->new_bh->b_data + header_off,
|
||||
args->old_bh->b_data + header_off, inline_size);
|
||||
|
||||
new_di = (struct ocfs2_dinode *)args->new_bh->b_data;
|
||||
new_di->i_xattr_inline_size = cpu_to_le16(inline_size);
|
||||
|
||||
ret = ocfs2_reflink_xattr_header(handle, args, args->old_bh, xh,
|
||||
args->new_bh, new_xh, &vb, meta_ac,
|
||||
ocfs2_get_xattr_value_root, NULL);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
goto out_commit;
|
||||
}
|
||||
|
||||
new_oi = OCFS2_I(args->new_inode);
|
||||
spin_lock(&new_oi->ip_lock);
|
||||
new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL | OCFS2_INLINE_XATTR_FL;
|
||||
new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features);
|
||||
spin_unlock(&new_oi->ip_lock);
|
||||
|
||||
ocfs2_journal_dirty(handle, args->new_bh);
|
||||
|
||||
out_commit:
|
||||
ocfs2_commit_trans(osb, handle);
|
||||
|
||||
out:
|
||||
if (meta_ac)
|
||||
ocfs2_free_alloc_context(meta_ac);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int ocfs2_create_empty_xattr_block(struct inode *inode,
|
||||
struct buffer_head *fe_bh,
|
||||
struct buffer_head **ret_bh,
|
||||
int indexed)
|
||||
{
|
||||
int ret;
|
||||
handle_t *handle;
|
||||
struct ocfs2_alloc_context *meta_ac;
|
||||
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
||||
|
||||
ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac);
|
||||
if (ret < 0) {
|
||||
mlog_errno(ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
handle = ocfs2_start_trans(osb, OCFS2_XATTR_BLOCK_CREATE_CREDITS);
|
||||
if (IS_ERR(handle)) {
|
||||
ret = PTR_ERR(handle);
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
mlog(0, "create new xattr block for inode %llu, index = %d\n",
|
||||
(unsigned long long)fe_bh->b_blocknr, indexed);
|
||||
ret = ocfs2_create_xattr_block(handle, inode, fe_bh,
|
||||
meta_ac, ret_bh, indexed);
|
||||
if (ret)
|
||||
mlog_errno(ret);
|
||||
|
||||
ocfs2_commit_trans(osb, handle);
|
||||
out:
|
||||
ocfs2_free_alloc_context(meta_ac);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int ocfs2_reflink_xattr_block(struct ocfs2_xattr_reflink *args,
|
||||
struct buffer_head *blk_bh,
|
||||
struct buffer_head *new_blk_bh)
|
||||
{
|
||||
int ret = 0, credits = 0;
|
||||
handle_t *handle;
|
||||
struct ocfs2_inode_info *new_oi = OCFS2_I(args->new_inode);
|
||||
struct ocfs2_dinode *new_di;
|
||||
struct ocfs2_super *osb = OCFS2_SB(args->new_inode->i_sb);
|
||||
int header_off = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
|
||||
struct ocfs2_xattr_block *xb =
|
||||
(struct ocfs2_xattr_block *)blk_bh->b_data;
|
||||
struct ocfs2_xattr_header *xh = &xb->xb_attrs.xb_header;
|
||||
struct ocfs2_xattr_block *new_xb =
|
||||
(struct ocfs2_xattr_block *)new_blk_bh->b_data;
|
||||
struct ocfs2_xattr_header *new_xh = &new_xb->xb_attrs.xb_header;
|
||||
struct ocfs2_alloc_context *meta_ac;
|
||||
struct ocfs2_xattr_value_buf vb = {
|
||||
.vb_bh = new_blk_bh,
|
||||
.vb_access = ocfs2_journal_access_xb,
|
||||
};
|
||||
|
||||
ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh,
|
||||
&credits, &meta_ac);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* One more credits in case we need to add xattr flags in new inode. */
|
||||
handle = ocfs2_start_trans(osb, credits + 1);
|
||||
if (IS_ERR(handle)) {
|
||||
ret = PTR_ERR(handle);
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) {
|
||||
ret = ocfs2_journal_access_di(handle,
|
||||
INODE_CACHE(args->new_inode),
|
||||
args->new_bh,
|
||||
OCFS2_JOURNAL_ACCESS_WRITE);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
goto out_commit;
|
||||
}
|
||||
}
|
||||
|
||||
ret = ocfs2_journal_access_xb(handle, INODE_CACHE(args->new_inode),
|
||||
new_blk_bh, OCFS2_JOURNAL_ACCESS_WRITE);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
goto out_commit;
|
||||
}
|
||||
|
||||
memcpy(new_blk_bh->b_data + header_off, blk_bh->b_data + header_off,
|
||||
osb->sb->s_blocksize - header_off);
|
||||
|
||||
ret = ocfs2_reflink_xattr_header(handle, args, blk_bh, xh,
|
||||
new_blk_bh, new_xh, &vb, meta_ac,
|
||||
ocfs2_get_xattr_value_root, NULL);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
goto out_commit;
|
||||
}
|
||||
|
||||
ocfs2_journal_dirty(handle, new_blk_bh);
|
||||
|
||||
if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) {
|
||||
new_di = (struct ocfs2_dinode *)args->new_bh->b_data;
|
||||
spin_lock(&new_oi->ip_lock);
|
||||
new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL;
|
||||
new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features);
|
||||
spin_unlock(&new_oi->ip_lock);
|
||||
|
||||
ocfs2_journal_dirty(handle, args->new_bh);
|
||||
}
|
||||
|
||||
out_commit:
|
||||
ocfs2_commit_trans(osb, handle);
|
||||
|
||||
out:
|
||||
ocfs2_free_alloc_context(meta_ac);
|
||||
return ret;
|
||||
}
|
||||
|
||||
struct ocfs2_reflink_xattr_tree_args {
|
||||
struct ocfs2_xattr_reflink *reflink;
|
||||
struct buffer_head *old_blk_bh;
|
||||
struct buffer_head *new_blk_bh;
|
||||
struct ocfs2_xattr_bucket *old_bucket;
|
||||
struct ocfs2_xattr_bucket *new_bucket;
|
||||
};
|
||||
|
||||
/*
|
||||
* NOTE:
|
||||
* We have to handle the case that both old bucket and new bucket
|
||||
* will call this function to get the right ret_bh.
|
||||
* So The caller must give us the right bh.
|
||||
*/
|
||||
static int ocfs2_get_reflink_xattr_value_root(struct super_block *sb,
|
||||
struct buffer_head *bh,
|
||||
struct ocfs2_xattr_header *xh,
|
||||
int offset,
|
||||
struct ocfs2_xattr_value_root **xv,
|
||||
struct buffer_head **ret_bh,
|
||||
void *para)
|
||||
{
|
||||
struct ocfs2_reflink_xattr_tree_args *args =
|
||||
(struct ocfs2_reflink_xattr_tree_args *)para;
|
||||
struct ocfs2_xattr_bucket *bucket;
|
||||
|
||||
if (bh == args->old_bucket->bu_bhs[0])
|
||||
bucket = args->old_bucket;
|
||||
else
|
||||
bucket = args->new_bucket;
|
||||
|
||||
return ocfs2_get_xattr_tree_value_root(sb, bucket, offset,
|
||||
xv, ret_bh);
|
||||
}
|
||||
|
||||
struct ocfs2_value_tree_metas {
|
||||
int num_metas;
|
||||
int credits;
|
||||
int num_recs;
|
||||
};
|
||||
|
||||
static int ocfs2_value_tree_metas_in_bucket(struct super_block *sb,
|
||||
struct buffer_head *bh,
|
||||
struct ocfs2_xattr_header *xh,
|
||||
int offset,
|
||||
struct ocfs2_xattr_value_root **xv,
|
||||
struct buffer_head **ret_bh,
|
||||
void *para)
|
||||
{
|
||||
struct ocfs2_xattr_bucket *bucket =
|
||||
(struct ocfs2_xattr_bucket *)para;
|
||||
|
||||
return ocfs2_get_xattr_tree_value_root(sb, bucket, offset,
|
||||
xv, ret_bh);
|
||||
}
|
||||
|
||||
static int ocfs2_calc_value_tree_metas(struct inode *inode,
|
||||
struct ocfs2_xattr_bucket *bucket,
|
||||
void *para)
|
||||
{
|
||||
struct ocfs2_value_tree_metas *metas =
|
||||
(struct ocfs2_value_tree_metas *)para;
|
||||
struct ocfs2_xattr_header *xh =
|
||||
(struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data;
|
||||
|
||||
/* Add the credits for this bucket first. */
|
||||
metas->credits += bucket->bu_blocks;
|
||||
return ocfs2_value_metas_in_xattr_header(inode->i_sb, bucket->bu_bhs[0],
|
||||
xh, &metas->num_metas,
|
||||
&metas->credits, &metas->num_recs,
|
||||
ocfs2_value_tree_metas_in_bucket,
|
||||
bucket);
|
||||
}
|
||||
|
||||
/*
|
||||
* Given a xattr extent rec starting from blkno and having len clusters,
|
||||
* iterate all the buckets calculate how much metadata we need for reflinking
|
||||
* all the ocfs2_xattr_value_root and lock the allocators accordingly.
|
||||
*/
|
||||
static int ocfs2_lock_reflink_xattr_rec_allocators(
|
||||
struct ocfs2_reflink_xattr_tree_args *args,
|
||||
struct ocfs2_extent_tree *xt_et,
|
||||
u64 blkno, u32 len, int *credits,
|
||||
struct ocfs2_alloc_context **meta_ac,
|
||||
struct ocfs2_alloc_context **data_ac)
|
||||
{
|
||||
int ret, num_free_extents;
|
||||
struct ocfs2_value_tree_metas metas;
|
||||
struct ocfs2_super *osb = OCFS2_SB(args->reflink->old_inode->i_sb);
|
||||
struct ocfs2_refcount_block *rb;
|
||||
|
||||
memset(&metas, 0, sizeof(metas));
|
||||
|
||||
ret = ocfs2_iterate_xattr_buckets(args->reflink->old_inode, blkno, len,
|
||||
ocfs2_calc_value_tree_metas, &metas);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
*credits = metas.credits;
|
||||
|
||||
/*
|
||||
* Calculate we need for refcount tree change.
|
||||
*
|
||||
* We need to add/modify num_recs in refcount tree, so just calculate
|
||||
* an approximate number we need for refcount tree change.
|
||||
* Sometimes we need to split the tree, and after split, half recs
|
||||
* will be moved to the new block, and a new block can only provide
|
||||
* half number of recs. So we multiple new blocks by 2.
|
||||
* In the end, we have to add credits for modifying the already
|
||||
* existed refcount block.
|
||||
*/
|
||||
rb = (struct ocfs2_refcount_block *)args->reflink->ref_root_bh->b_data;
|
||||
metas.num_recs =
|
||||
(metas.num_recs + ocfs2_refcount_recs_per_rb(osb->sb) - 1) /
|
||||
ocfs2_refcount_recs_per_rb(osb->sb) * 2;
|
||||
metas.num_metas += metas.num_recs;
|
||||
*credits += metas.num_recs +
|
||||
metas.num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS;
|
||||
if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL)
|
||||
*credits += le16_to_cpu(rb->rf_list.l_tree_depth) *
|
||||
le16_to_cpu(rb->rf_list.l_next_free_rec) + 1;
|
||||
else
|
||||
*credits += 1;
|
||||
|
||||
/* count in the xattr tree change. */
|
||||
num_free_extents = ocfs2_num_free_extents(osb, xt_et);
|
||||
if (num_free_extents < 0) {
|
||||
ret = num_free_extents;
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (num_free_extents < len)
|
||||
metas.num_metas += ocfs2_extend_meta_needed(xt_et->et_root_el);
|
||||
|
||||
*credits += ocfs2_calc_extend_credits(osb->sb,
|
||||
xt_et->et_root_el, len);
|
||||
|
||||
if (metas.num_metas) {
|
||||
ret = ocfs2_reserve_new_metadata_blocks(osb, metas.num_metas,
|
||||
meta_ac);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
if (len) {
|
||||
ret = ocfs2_reserve_clusters(osb, len, data_ac);
|
||||
if (ret)
|
||||
mlog_errno(ret);
|
||||
}
|
||||
out:
|
||||
if (ret) {
|
||||
if (*meta_ac) {
|
||||
ocfs2_free_alloc_context(*meta_ac);
|
||||
meta_ac = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int ocfs2_reflink_xattr_buckets(handle_t *handle,
|
||||
u64 blkno, u64 new_blkno, u32 clusters,
|
||||
struct ocfs2_alloc_context *meta_ac,
|
||||
struct ocfs2_alloc_context *data_ac,
|
||||
struct ocfs2_reflink_xattr_tree_args *args)
|
||||
{
|
||||
int i, j, ret = 0;
|
||||
struct super_block *sb = args->reflink->old_inode->i_sb;
|
||||
u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb));
|
||||
u32 num_buckets = clusters * bpc;
|
||||
int bpb = args->old_bucket->bu_blocks;
|
||||
struct ocfs2_xattr_value_buf vb = {
|
||||
.vb_access = ocfs2_journal_access,
|
||||
};
|
||||
|
||||
for (i = 0; i < num_buckets; i++, blkno += bpb, new_blkno += bpb) {
|
||||
ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
break;
|
||||
}
|
||||
|
||||
ret = ocfs2_init_xattr_bucket(args->new_bucket, new_blkno);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* The real bucket num in this series of blocks is stored
|
||||
* in the 1st bucket.
|
||||
*/
|
||||
if (i == 0)
|
||||
num_buckets = le16_to_cpu(
|
||||
bucket_xh(args->old_bucket)->xh_num_buckets);
|
||||
|
||||
ret = ocfs2_xattr_bucket_journal_access(handle,
|
||||
args->new_bucket,
|
||||
OCFS2_JOURNAL_ACCESS_CREATE);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
break;
|
||||
}
|
||||
|
||||
for (j = 0; j < bpb; j++)
|
||||
memcpy(bucket_block(args->new_bucket, j),
|
||||
bucket_block(args->old_bucket, j),
|
||||
sb->s_blocksize);
|
||||
|
||||
ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket);
|
||||
|
||||
ret = ocfs2_reflink_xattr_header(handle, args->reflink,
|
||||
args->old_bucket->bu_bhs[0],
|
||||
bucket_xh(args->old_bucket),
|
||||
args->new_bucket->bu_bhs[0],
|
||||
bucket_xh(args->new_bucket),
|
||||
&vb, meta_ac,
|
||||
ocfs2_get_reflink_xattr_value_root,
|
||||
args);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* Re-access and dirty the bucket to calculate metaecc.
|
||||
* Because we may extend the transaction in reflink_xattr_header
|
||||
* which will let the already accessed block gone.
|
||||
*/
|
||||
ret = ocfs2_xattr_bucket_journal_access(handle,
|
||||
args->new_bucket,
|
||||
OCFS2_JOURNAL_ACCESS_WRITE);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
break;
|
||||
}
|
||||
|
||||
ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket);
|
||||
ocfs2_xattr_bucket_relse(args->old_bucket);
|
||||
ocfs2_xattr_bucket_relse(args->new_bucket);
|
||||
}
|
||||
|
||||
ocfs2_xattr_bucket_relse(args->old_bucket);
|
||||
ocfs2_xattr_bucket_relse(args->new_bucket);
|
||||
return ret;
|
||||
}
|
||||
/*
|
||||
* Create the same xattr extent record in the new inode's xattr tree.
|
||||
*/
|
||||
static int ocfs2_reflink_xattr_rec(struct inode *inode,
|
||||
struct buffer_head *root_bh,
|
||||
u64 blkno,
|
||||
u32 cpos,
|
||||
u32 len,
|
||||
void *para)
|
||||
{
|
||||
int ret, credits = 0;
|
||||
u32 p_cluster, num_clusters;
|
||||
u64 new_blkno;
|
||||
handle_t *handle;
|
||||
struct ocfs2_reflink_xattr_tree_args *args =
|
||||
(struct ocfs2_reflink_xattr_tree_args *)para;
|
||||
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
||||
struct ocfs2_alloc_context *meta_ac = NULL;
|
||||
struct ocfs2_alloc_context *data_ac = NULL;
|
||||
struct ocfs2_extent_tree et;
|
||||
|
||||
ocfs2_init_xattr_tree_extent_tree(&et,
|
||||
INODE_CACHE(args->reflink->new_inode),
|
||||
args->new_blk_bh);
|
||||
|
||||
ret = ocfs2_lock_reflink_xattr_rec_allocators(args, &et, blkno,
|
||||
len, &credits,
|
||||
&meta_ac, &data_ac);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
handle = ocfs2_start_trans(osb, credits);
|
||||
if (IS_ERR(handle)) {
|
||||
ret = PTR_ERR(handle);
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
ret = ocfs2_claim_clusters(osb, handle, data_ac,
|
||||
len, &p_cluster, &num_clusters);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
goto out_commit;
|
||||
}
|
||||
|
||||
new_blkno = ocfs2_clusters_to_blocks(osb->sb, p_cluster);
|
||||
|
||||
mlog(0, "reflink xattr buckets %llu to %llu, len %u\n",
|
||||
(unsigned long long)blkno, (unsigned long long)new_blkno, len);
|
||||
ret = ocfs2_reflink_xattr_buckets(handle, blkno, new_blkno, len,
|
||||
meta_ac, data_ac, args);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
goto out_commit;
|
||||
}
|
||||
|
||||
mlog(0, "insert new xattr extent rec start %llu len %u to %u\n",
|
||||
(unsigned long long)new_blkno, len, cpos);
|
||||
ret = ocfs2_insert_extent(handle, &et, cpos, new_blkno,
|
||||
len, 0, meta_ac);
|
||||
if (ret)
|
||||
mlog_errno(ret);
|
||||
|
||||
out_commit:
|
||||
ocfs2_commit_trans(osb, handle);
|
||||
|
||||
out:
|
||||
if (meta_ac)
|
||||
ocfs2_free_alloc_context(meta_ac);
|
||||
if (data_ac)
|
||||
ocfs2_free_alloc_context(data_ac);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* Create reflinked xattr buckets.
|
||||
* We will add bucket one by one, and refcount all the xattrs in the bucket
|
||||
* if they are stored outside.
|
||||
*/
|
||||
static int ocfs2_reflink_xattr_tree(struct ocfs2_xattr_reflink *args,
|
||||
struct buffer_head *blk_bh,
|
||||
struct buffer_head *new_blk_bh)
|
||||
{
|
||||
int ret;
|
||||
struct ocfs2_reflink_xattr_tree_args para;
|
||||
|
||||
memset(¶, 0, sizeof(para));
|
||||
para.reflink = args;
|
||||
para.old_blk_bh = blk_bh;
|
||||
para.new_blk_bh = new_blk_bh;
|
||||
|
||||
para.old_bucket = ocfs2_xattr_bucket_new(args->old_inode);
|
||||
if (!para.old_bucket) {
|
||||
mlog_errno(-ENOMEM);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
para.new_bucket = ocfs2_xattr_bucket_new(args->new_inode);
|
||||
if (!para.new_bucket) {
|
||||
ret = -ENOMEM;
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
ret = ocfs2_iterate_xattr_index_block(args->old_inode, blk_bh,
|
||||
ocfs2_reflink_xattr_rec,
|
||||
¶);
|
||||
if (ret)
|
||||
mlog_errno(ret);
|
||||
|
||||
out:
|
||||
ocfs2_xattr_bucket_free(para.old_bucket);
|
||||
ocfs2_xattr_bucket_free(para.new_bucket);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int ocfs2_reflink_xattr_in_block(struct ocfs2_xattr_reflink *args,
|
||||
struct buffer_head *blk_bh)
|
||||
{
|
||||
int ret, indexed = 0;
|
||||
struct buffer_head *new_blk_bh = NULL;
|
||||
struct ocfs2_xattr_block *xb =
|
||||
(struct ocfs2_xattr_block *)blk_bh->b_data;
|
||||
|
||||
|
||||
if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)
|
||||
indexed = 1;
|
||||
|
||||
ret = ocfs2_create_empty_xattr_block(args->new_inode, args->new_bh,
|
||||
&new_blk_bh, indexed);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED))
|
||||
ret = ocfs2_reflink_xattr_block(args, blk_bh, new_blk_bh);
|
||||
else
|
||||
ret = ocfs2_reflink_xattr_tree(args, blk_bh, new_blk_bh);
|
||||
if (ret)
|
||||
mlog_errno(ret);
|
||||
|
||||
out:
|
||||
brelse(new_blk_bh);
|
||||
return ret;
|
||||
}
|
||||
|
||||
int ocfs2_reflink_xattrs(struct inode *old_inode,
|
||||
struct buffer_head *old_bh,
|
||||
struct inode *new_inode,
|
||||
struct buffer_head *new_bh)
|
||||
{
|
||||
int ret;
|
||||
struct ocfs2_xattr_reflink args;
|
||||
struct ocfs2_inode_info *oi = OCFS2_I(old_inode);
|
||||
struct ocfs2_dinode *di = (struct ocfs2_dinode *)old_bh->b_data;
|
||||
struct buffer_head *blk_bh = NULL;
|
||||
struct ocfs2_cached_dealloc_ctxt dealloc;
|
||||
struct ocfs2_refcount_tree *ref_tree;
|
||||
struct buffer_head *ref_root_bh = NULL;
|
||||
|
||||
ret = ocfs2_lock_refcount_tree(OCFS2_SB(old_inode->i_sb),
|
||||
le64_to_cpu(di->i_refcount_loc),
|
||||
1, &ref_tree, &ref_root_bh);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
ocfs2_init_dealloc_ctxt(&dealloc);
|
||||
|
||||
args.old_inode = old_inode;
|
||||
args.new_inode = new_inode;
|
||||
args.old_bh = old_bh;
|
||||
args.new_bh = new_bh;
|
||||
args.ref_ci = &ref_tree->rf_ci;
|
||||
args.ref_root_bh = ref_root_bh;
|
||||
args.dealloc = &dealloc;
|
||||
|
||||
if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
|
||||
ret = ocfs2_reflink_xattr_inline(&args);
|
||||
if (ret) {
|
||||
mlog_errno(ret);
|
||||
goto out_unlock;
|
||||
}
|
||||
}
|
||||
|
||||
if (!di->i_xattr_loc)
|
||||
goto out_unlock;
|
||||
|
||||
ret = ocfs2_read_xattr_block(old_inode, le64_to_cpu(di->i_xattr_loc),
|
||||
&blk_bh);
|
||||
if (ret < 0) {
|
||||
mlog_errno(ret);
|
||||
goto out_unlock;
|
||||
}
|
||||
|
||||
ret = ocfs2_reflink_xattr_in_block(&args, blk_bh);
|
||||
if (ret)
|
||||
mlog_errno(ret);
|
||||
|
||||
brelse(blk_bh);
|
||||
|
||||
out_unlock:
|
||||
ocfs2_unlock_refcount_tree(OCFS2_SB(old_inode->i_sb),
|
||||
ref_tree, 1);
|
||||
brelse(ref_root_bh);
|
||||
|
||||
if (ocfs2_dealloc_has_cluster(&dealloc)) {
|
||||
ocfs2_schedule_truncate_log_flush(OCFS2_SB(old_inode->i_sb), 1);
|
||||
ocfs2_run_deallocs(OCFS2_SB(old_inode->i_sb), &dealloc);
|
||||
}
|
||||
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* 'security' attributes support
|
||||
*/
|
||||
|
|
|
|||
|
|
@ -90,4 +90,8 @@ int ocfs2_xattr_attach_refcount_tree(struct inode *inode,
|
|||
struct ocfs2_caching_info *ref_ci,
|
||||
struct buffer_head *ref_root_bh,
|
||||
struct ocfs2_cached_dealloc_ctxt *dealloc);
|
||||
int ocfs2_reflink_xattrs(struct inode *old_inode,
|
||||
struct buffer_head *old_bh,
|
||||
struct inode *new_inode,
|
||||
struct buffer_head *new_bh);
|
||||
#endif /* OCFS2_XATTR_H */
|
||||
|
|
|
|||
Loading…
Reference in New Issue