#include "alloc.h"
#include "dat.h"
-/**
- * struct nilfs_btree_path - A path on which B-tree operations are executed
- * @bp_bh: buffer head of node block
- * @bp_sib_bh: buffer head of sibling node block
- * @bp_index: index of child node
- * @bp_oldreq: ptr end request for old ptr
- * @bp_newreq: ptr alloc request for new ptr
- * @bp_op: rebalance operation
- */
-struct nilfs_btree_path {
- struct buffer_head *bp_bh;
- struct buffer_head *bp_sib_bh;
- int bp_index;
- union nilfs_bmap_ptr_req bp_oldreq;
- union nilfs_bmap_ptr_req bp_newreq;
- struct nilfs_btnode_chkey_ctxt bp_ctxt;
- void (*bp_op)(struct nilfs_btree *, struct nilfs_btree_path *,
- int, __u64 *, __u64 *);
-};
-
-/*
- * B-tree path operations
- */
-
-static struct kmem_cache *nilfs_btree_path_cache;
-
-int __init nilfs_btree_path_cache_init(void)
+static struct nilfs_btree_path *nilfs_btree_alloc_path(void)
{
- nilfs_btree_path_cache =
- kmem_cache_create("nilfs2_btree_path_cache",
- sizeof(struct nilfs_btree_path) *
- NILFS_BTREE_LEVEL_MAX, 0, 0, NULL);
- return (nilfs_btree_path_cache != NULL) ? 0 : -ENOMEM;
-}
-
-void nilfs_btree_path_cache_destroy(void)
-{
- kmem_cache_destroy(nilfs_btree_path_cache);
-}
-
-static inline struct nilfs_btree_path *nilfs_btree_alloc_path(void)
-{
- return kmem_cache_alloc(nilfs_btree_path_cache, GFP_NOFS);
-}
-
-static inline void nilfs_btree_free_path(struct nilfs_btree_path *path)
-{
- kmem_cache_free(nilfs_btree_path_cache, path);
-}
+ struct nilfs_btree_path *path;
+ int level = NILFS_BTREE_LEVEL_DATA;
-static void nilfs_btree_init_path(struct nilfs_btree_path *path)
-{
- int level;
+ path = kmem_cache_alloc(nilfs_btree_path_cache, GFP_NOFS);
+ if (path == NULL)
+ goto out;
- for (level = NILFS_BTREE_LEVEL_DATA;
- level < NILFS_BTREE_LEVEL_MAX;
- level++) {
+ for (; level < NILFS_BTREE_LEVEL_MAX; level++) {
path[level].bp_bh = NULL;
path[level].bp_sib_bh = NULL;
path[level].bp_index = 0;
path[level].bp_newreq.bpr_ptr = NILFS_BMAP_INVALID_PTR;
path[level].bp_op = NULL;
}
+
+out:
+ return path;
}
-static void nilfs_btree_release_path(struct nilfs_btree_path *path)
+static void nilfs_btree_free_path(struct nilfs_btree_path *path)
{
- int level;
+ int level = NILFS_BTREE_LEVEL_DATA;
- for (level = NILFS_BTREE_LEVEL_DATA; level < NILFS_BTREE_LEVEL_MAX;
- level++)
+ for (; level < NILFS_BTREE_LEVEL_MAX; level++)
brelse(path[level].bp_bh);
+
+ kmem_cache_free(nilfs_btree_path_cache, path);
}
/*
{
struct address_space *btnc =
&NILFS_BMAP_I((struct nilfs_bmap *)btree)->i_btnode_cache;
- return nilfs_btnode_get(btnc, ptr, 0, bhp, 0);
+ int err;
+
+ err = nilfs_btnode_submit_block(btnc, ptr, 0, bhp);
+ if (err)
+ return err == -EEXIST ? 0 : err;
+
+ wait_on_buffer(*bhp);
+ if (!buffer_uptodate(*bhp)) {
+ brelse(*bhp);
+ return -EIO;
+ }
+ return 0;
}
static int nilfs_btree_get_new_block(const struct nilfs_btree *btree,
path = nilfs_btree_alloc_path();
if (path == NULL)
return -ENOMEM;
- nilfs_btree_init_path(path);
ret = nilfs_btree_do_lookup(btree, path, key, &ptr, level);
if (ptrp != NULL)
*ptrp = ptr;
- nilfs_btree_release_path(path);
nilfs_btree_free_path(path);
return ret;
path = nilfs_btree_alloc_path();
if (path == NULL)
return -ENOMEM;
- nilfs_btree_init_path(path);
+
ret = nilfs_btree_do_lookup(btree, path, key, &ptr, level);
if (ret < 0)
goto out;
*ptrp = ptr;
ret = cnt;
out:
- nilfs_btree_release_path(path);
nilfs_btree_free_path(path);
return ret;
}
path = nilfs_btree_alloc_path();
if (path == NULL)
return -ENOMEM;
- nilfs_btree_init_path(path);
ret = nilfs_btree_do_lookup(btree, path, key, NULL,
NILFS_BTREE_LEVEL_NODE_MIN);
nilfs_bmap_add_blocks(bmap, stats.bs_nblocks);
out:
- nilfs_btree_release_path(path);
nilfs_btree_free_path(path);
return ret;
}
path = nilfs_btree_alloc_path();
if (path == NULL)
return -ENOMEM;
- nilfs_btree_init_path(path);
+
ret = nilfs_btree_do_lookup(btree, path, key, NULL,
NILFS_BTREE_LEVEL_NODE_MIN);
if (ret < 0)
nilfs_bmap_sub_blocks(bmap, stats.bs_nblocks);
out:
- nilfs_btree_release_path(path);
nilfs_btree_free_path(path);
return ret;
}
path = nilfs_btree_alloc_path();
if (path == NULL)
return -ENOMEM;
- nilfs_btree_init_path(path);
ret = nilfs_btree_do_lookup_last(btree, path, keyp, NULL);
- nilfs_btree_release_path(path);
nilfs_btree_free_path(path);
return ret;
struct nilfs_btree_path *path,
int level, struct buffer_head *bh)
{
- int maxlevel, ret;
+ int maxlevel = 0, ret;
struct nilfs_btree_node *parent;
struct inode *dat = nilfs_bmap_get_dat(&btree->bt_bmap);
__u64 ptr;
path = nilfs_btree_alloc_path();
if (path == NULL)
return -ENOMEM;
- nilfs_btree_init_path(path);
if (buffer_nilfs_node(bh)) {
node = (struct nilfs_btree_node *)bh->b_data;
nilfs_btree_propagate_p(btree, path, level, bh);
out:
- nilfs_btree_release_path(path);
nilfs_btree_free_path(path);
return ret;
for (level = NILFS_BTREE_LEVEL_NODE_MIN;
level < NILFS_BTREE_LEVEL_MAX;
level++)
- list_splice(&lists[level], listp->prev);
+ list_splice_tail(&lists[level], listp);
}
static int nilfs_btree_assign_p(struct nilfs_btree *btree,
path = nilfs_btree_alloc_path();
if (path == NULL)
return -ENOMEM;
- nilfs_btree_init_path(path);
if (buffer_nilfs_node(*bh)) {
node = (struct nilfs_btree_node *)(*bh)->b_data;
nilfs_btree_assign_p(btree, path, level, bh, blocknr, binfo);
out:
- nilfs_btree_release_path(path);
nilfs_btree_free_path(path);
return ret;
path = nilfs_btree_alloc_path();
if (path == NULL)
return -ENOMEM;
- nilfs_btree_init_path(path);
ret = nilfs_btree_do_lookup(btree, path, key, &ptr, level + 1);
if (ret < 0) {
nilfs_bmap_set_dirty(&btree->bt_bmap);
out:
- nilfs_btree_release_path(path);
nilfs_btree_free_path(path);
return ret;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff