#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);
}
/*
* B-tree node operations
*/
-static int nilfs_btree_get_block(const struct nilfs_btree *btree, __u64 ptr,
- struct buffer_head **bhp)
-{
- struct address_space *btnc =
- &NILFS_BMAP_I((struct nilfs_bmap *)btree)->i_btnode_cache;
- return nilfs_btnode_get(btnc, ptr, 0, bhp, 0);
-}
-
-static int nilfs_btree_get_new_block(const struct nilfs_btree *btree,
+static int nilfs_btree_get_new_block(const struct nilfs_bmap *btree,
__u64 ptr, struct buffer_head **bhp)
{
- struct address_space *btnc =
- &NILFS_BMAP_I((struct nilfs_bmap *)btree)->i_btnode_cache;
- int ret;
+ struct address_space *btnc = &NILFS_BMAP_I(btree)->i_btnode_cache;
+ struct buffer_head *bh;
- ret = nilfs_btnode_get(btnc, ptr, 0, bhp, 1);
- if (!ret)
- set_buffer_nilfs_volatile(*bhp);
- return ret;
+ bh = nilfs_btnode_create_block(btnc, ptr);
+ if (!bh)
+ return -ENOMEM;
+
+ set_buffer_nilfs_volatile(bh);
+ *bhp = bh;
+ return 0;
}
-static inline int
-nilfs_btree_node_get_flags(const struct nilfs_btree_node *node)
+static int nilfs_btree_node_get_flags(const struct nilfs_btree_node *node)
{
return node->bn_flags;
}
-static inline void
+static void
nilfs_btree_node_set_flags(struct nilfs_btree_node *node, int flags)
{
node->bn_flags = flags;
}
-static inline int nilfs_btree_node_root(const struct nilfs_btree_node *node)
+static int nilfs_btree_node_root(const struct nilfs_btree_node *node)
{
return nilfs_btree_node_get_flags(node) & NILFS_BTREE_NODE_ROOT;
}
-static inline int
-nilfs_btree_node_get_level(const struct nilfs_btree_node *node)
+static int nilfs_btree_node_get_level(const struct nilfs_btree_node *node)
{
return node->bn_level;
}
-static inline void
+static void
nilfs_btree_node_set_level(struct nilfs_btree_node *node, int level)
{
node->bn_level = level;
}
-static inline int
-nilfs_btree_node_get_nchildren(const struct nilfs_btree_node *node)
+static int nilfs_btree_node_get_nchildren(const struct nilfs_btree_node *node)
{
return le16_to_cpu(node->bn_nchildren);
}
-static inline void
+static void
nilfs_btree_node_set_nchildren(struct nilfs_btree_node *node, int nchildren)
{
node->bn_nchildren = cpu_to_le16(nchildren);
}
-static inline int nilfs_btree_node_size(const struct nilfs_btree *btree)
+static int nilfs_btree_node_size(const struct nilfs_bmap *btree)
{
- return 1 << btree->bt_bmap.b_inode->i_blkbits;
+ return 1 << btree->b_inode->i_blkbits;
}
-static inline int
-nilfs_btree_node_nchildren_min(const struct nilfs_btree_node *node,
- const struct nilfs_btree *btree)
+static int nilfs_btree_nchildren_per_block(const struct nilfs_bmap *btree)
{
- return nilfs_btree_node_root(node) ?
- NILFS_BTREE_ROOT_NCHILDREN_MIN :
- NILFS_BTREE_NODE_NCHILDREN_MIN(nilfs_btree_node_size(btree));
+ return btree->b_nchildren_per_block;
}
-static inline int
-nilfs_btree_node_nchildren_max(const struct nilfs_btree_node *node,
- const struct nilfs_btree *btree)
-{
- return nilfs_btree_node_root(node) ?
- NILFS_BTREE_ROOT_NCHILDREN_MAX :
- NILFS_BTREE_NODE_NCHILDREN_MAX(nilfs_btree_node_size(btree));
-}
-
-static inline __le64 *
+static __le64 *
nilfs_btree_node_dkeys(const struct nilfs_btree_node *node)
{
return (__le64 *)((char *)(node + 1) +
0 : NILFS_BTREE_NODE_EXTRA_PAD_SIZE));
}
-static inline __le64 *
-nilfs_btree_node_dptrs(const struct nilfs_btree_node *node,
- const struct nilfs_btree *btree)
+static __le64 *
+nilfs_btree_node_dptrs(const struct nilfs_btree_node *node, int ncmax)
{
- return (__le64 *)(nilfs_btree_node_dkeys(node) +
- nilfs_btree_node_nchildren_max(node, btree));
+ return (__le64 *)(nilfs_btree_node_dkeys(node) + ncmax);
}
-static inline __u64
+static __u64
nilfs_btree_node_get_key(const struct nilfs_btree_node *node, int index)
{
- return nilfs_bmap_dkey_to_key(*(nilfs_btree_node_dkeys(node) + index));
+ return le64_to_cpu(*(nilfs_btree_node_dkeys(node) + index));
}
-static inline void
+static void
nilfs_btree_node_set_key(struct nilfs_btree_node *node, int index, __u64 key)
{
- *(nilfs_btree_node_dkeys(node) + index) = nilfs_bmap_key_to_dkey(key);
+ *(nilfs_btree_node_dkeys(node) + index) = cpu_to_le64(key);
}
-static inline __u64
-nilfs_btree_node_get_ptr(const struct nilfs_btree *btree,
- const struct nilfs_btree_node *node, int index)
+static __u64
+nilfs_btree_node_get_ptr(const struct nilfs_btree_node *node, int index,
+ int ncmax)
{
- return nilfs_bmap_dptr_to_ptr(*(nilfs_btree_node_dptrs(node, btree) +
- index));
+ return le64_to_cpu(*(nilfs_btree_node_dptrs(node, ncmax) + index));
}
-static inline void
-nilfs_btree_node_set_ptr(struct nilfs_btree *btree,
- struct nilfs_btree_node *node, int index, __u64 ptr)
+static void
+nilfs_btree_node_set_ptr(struct nilfs_btree_node *node, int index, __u64 ptr,
+ int ncmax)
{
- *(nilfs_btree_node_dptrs(node, btree) + index) =
- nilfs_bmap_ptr_to_dptr(ptr);
+ *(nilfs_btree_node_dptrs(node, ncmax) + index) = cpu_to_le64(ptr);
}
-static void nilfs_btree_node_init(struct nilfs_btree *btree,
- struct nilfs_btree_node *node,
- int flags, int level, int nchildren,
+static void nilfs_btree_node_init(struct nilfs_btree_node *node, int flags,
+ int level, int nchildren, int ncmax,
const __u64 *keys, const __u64 *ptrs)
{
__le64 *dkeys;
nilfs_btree_node_set_nchildren(node, nchildren);
dkeys = nilfs_btree_node_dkeys(node);
- dptrs = nilfs_btree_node_dptrs(node, btree);
+ dptrs = nilfs_btree_node_dptrs(node, ncmax);
for (i = 0; i < nchildren; i++) {
- dkeys[i] = nilfs_bmap_key_to_dkey(keys[i]);
- dptrs[i] = nilfs_bmap_ptr_to_dptr(ptrs[i]);
+ dkeys[i] = cpu_to_le64(keys[i]);
+ dptrs[i] = cpu_to_le64(ptrs[i]);
}
}
/* Assume the buffer heads corresponding to left and right are locked. */
-static void nilfs_btree_node_move_left(struct nilfs_btree *btree,
- struct nilfs_btree_node *left,
+static void nilfs_btree_node_move_left(struct nilfs_btree_node *left,
struct nilfs_btree_node *right,
- int n)
+ int n, int lncmax, int rncmax)
{
__le64 *ldkeys, *rdkeys;
__le64 *ldptrs, *rdptrs;
int lnchildren, rnchildren;
ldkeys = nilfs_btree_node_dkeys(left);
- ldptrs = nilfs_btree_node_dptrs(left, btree);
+ ldptrs = nilfs_btree_node_dptrs(left, lncmax);
lnchildren = nilfs_btree_node_get_nchildren(left);
rdkeys = nilfs_btree_node_dkeys(right);
- rdptrs = nilfs_btree_node_dptrs(right, btree);
+ rdptrs = nilfs_btree_node_dptrs(right, rncmax);
rnchildren = nilfs_btree_node_get_nchildren(right);
memcpy(ldkeys + lnchildren, rdkeys, n * sizeof(*rdkeys));
}
/* Assume that the buffer heads corresponding to left and right are locked. */
-static void nilfs_btree_node_move_right(struct nilfs_btree *btree,
- struct nilfs_btree_node *left,
+static void nilfs_btree_node_move_right(struct nilfs_btree_node *left,
struct nilfs_btree_node *right,
- int n)
+ int n, int lncmax, int rncmax)
{
__le64 *ldkeys, *rdkeys;
__le64 *ldptrs, *rdptrs;
int lnchildren, rnchildren;
ldkeys = nilfs_btree_node_dkeys(left);
- ldptrs = nilfs_btree_node_dptrs(left, btree);
+ ldptrs = nilfs_btree_node_dptrs(left, lncmax);
lnchildren = nilfs_btree_node_get_nchildren(left);
rdkeys = nilfs_btree_node_dkeys(right);
- rdptrs = nilfs_btree_node_dptrs(right, btree);
+ rdptrs = nilfs_btree_node_dptrs(right, rncmax);
rnchildren = nilfs_btree_node_get_nchildren(right);
memmove(rdkeys + n, rdkeys, rnchildren * sizeof(*rdkeys));
}
/* Assume that the buffer head corresponding to node is locked. */
-static void nilfs_btree_node_insert(struct nilfs_btree *btree,
- struct nilfs_btree_node *node,
- __u64 key, __u64 ptr, int index)
+static void nilfs_btree_node_insert(struct nilfs_btree_node *node, int index,
+ __u64 key, __u64 ptr, int ncmax)
{
__le64 *dkeys;
__le64 *dptrs;
int nchildren;
dkeys = nilfs_btree_node_dkeys(node);
- dptrs = nilfs_btree_node_dptrs(node, btree);
+ dptrs = nilfs_btree_node_dptrs(node, ncmax);
nchildren = nilfs_btree_node_get_nchildren(node);
if (index < nchildren) {
memmove(dkeys + index + 1, dkeys + index,
memmove(dptrs + index + 1, dptrs + index,
(nchildren - index) * sizeof(*dptrs));
}
- dkeys[index] = nilfs_bmap_key_to_dkey(key);
- dptrs[index] = nilfs_bmap_ptr_to_dptr(ptr);
+ dkeys[index] = cpu_to_le64(key);
+ dptrs[index] = cpu_to_le64(ptr);
nchildren++;
nilfs_btree_node_set_nchildren(node, nchildren);
}
/* Assume that the buffer head corresponding to node is locked. */
-static void nilfs_btree_node_delete(struct nilfs_btree *btree,
- struct nilfs_btree_node *node,
- __u64 *keyp, __u64 *ptrp, int index)
+static void nilfs_btree_node_delete(struct nilfs_btree_node *node, int index,
+ __u64 *keyp, __u64 *ptrp, int ncmax)
{
__u64 key;
__u64 ptr;
int nchildren;
dkeys = nilfs_btree_node_dkeys(node);
- dptrs = nilfs_btree_node_dptrs(node, btree);
- key = nilfs_bmap_dkey_to_key(dkeys[index]);
- ptr = nilfs_bmap_dptr_to_ptr(dptrs[index]);
+ dptrs = nilfs_btree_node_dptrs(node, ncmax);
+ key = le64_to_cpu(dkeys[index]);
+ ptr = le64_to_cpu(dptrs[index]);
nchildren = nilfs_btree_node_get_nchildren(node);
if (keyp != NULL)
*keyp = key;
return s == 0;
}
-static inline struct nilfs_btree_node *
-nilfs_btree_get_root(const struct nilfs_btree *btree)
+/**
+ * nilfs_btree_node_broken - verify consistency of btree node
+ * @node: btree node block to be examined
+ * @size: node size (in bytes)
+ * @blocknr: block number
+ *
+ * Return Value: If node is broken, 1 is returned. Otherwise, 0 is returned.
+ */
+static int nilfs_btree_node_broken(const struct nilfs_btree_node *node,
+ size_t size, sector_t blocknr)
{
- return (struct nilfs_btree_node *)btree->bt_bmap.b_u.u_data;
+ int level, flags, nchildren;
+ int ret = 0;
+
+ level = nilfs_btree_node_get_level(node);
+ flags = nilfs_btree_node_get_flags(node);
+ nchildren = nilfs_btree_node_get_nchildren(node);
+
+ if (unlikely(level < NILFS_BTREE_LEVEL_NODE_MIN ||
+ level >= NILFS_BTREE_LEVEL_MAX ||
+ (flags & NILFS_BTREE_NODE_ROOT) ||
+ nchildren < 0 ||
+ nchildren > NILFS_BTREE_NODE_NCHILDREN_MAX(size))) {
+ printk(KERN_CRIT "NILFS: bad btree node (blocknr=%llu): "
+ "level = %d, flags = 0x%x, nchildren = %d\n",
+ (unsigned long long)blocknr, level, flags, nchildren);
+ ret = 1;
+ }
+ return ret;
+}
+
+int nilfs_btree_broken_node_block(struct buffer_head *bh)
+{
+ int ret;
+
+ if (buffer_nilfs_checked(bh))
+ return 0;
+
+ ret = nilfs_btree_node_broken((struct nilfs_btree_node *)bh->b_data,
+ bh->b_size, bh->b_blocknr);
+ if (likely(!ret))
+ set_buffer_nilfs_checked(bh);
+ return ret;
}
-static inline struct nilfs_btree_node *
+static struct nilfs_btree_node *
+nilfs_btree_get_root(const struct nilfs_bmap *btree)
+{
+ return (struct nilfs_btree_node *)btree->b_u.u_data;
+}
+
+static struct nilfs_btree_node *
nilfs_btree_get_nonroot_node(const struct nilfs_btree_path *path, int level)
{
return (struct nilfs_btree_node *)path[level].bp_bh->b_data;
}
-static inline struct nilfs_btree_node *
+static struct nilfs_btree_node *
nilfs_btree_get_sib_node(const struct nilfs_btree_path *path, int level)
{
return (struct nilfs_btree_node *)path[level].bp_sib_bh->b_data;
}
-static inline int nilfs_btree_height(const struct nilfs_btree *btree)
+static int nilfs_btree_height(const struct nilfs_bmap *btree)
{
return nilfs_btree_node_get_level(nilfs_btree_get_root(btree)) + 1;
}
-static inline struct nilfs_btree_node *
-nilfs_btree_get_node(const struct nilfs_btree *btree,
+static struct nilfs_btree_node *
+nilfs_btree_get_node(const struct nilfs_bmap *btree,
const struct nilfs_btree_path *path,
- int level)
+ int level, int *ncmaxp)
+{
+ struct nilfs_btree_node *node;
+
+ if (level == nilfs_btree_height(btree) - 1) {
+ node = nilfs_btree_get_root(btree);
+ *ncmaxp = NILFS_BTREE_ROOT_NCHILDREN_MAX;
+ } else {
+ node = nilfs_btree_get_nonroot_node(path, level);
+ *ncmaxp = nilfs_btree_nchildren_per_block(btree);
+ }
+ return node;
+}
+
+static int
+nilfs_btree_bad_node(struct nilfs_btree_node *node, int level)
+{
+ if (unlikely(nilfs_btree_node_get_level(node) != level)) {
+ dump_stack();
+ printk(KERN_CRIT "NILFS: btree level mismatch: %d != %d\n",
+ nilfs_btree_node_get_level(node), level);
+ return 1;
+ }
+ return 0;
+}
+
+struct nilfs_btree_readahead_info {
+ struct nilfs_btree_node *node; /* parent node */
+ int max_ra_blocks; /* max nof blocks to read ahead */
+ int index; /* current index on the parent node */
+ int ncmax; /* nof children in the parent node */
+};
+
+static int __nilfs_btree_get_block(const struct nilfs_bmap *btree, __u64 ptr,
+ struct buffer_head **bhp,
+ const struct nilfs_btree_readahead_info *ra)
+{
+ struct address_space *btnc = &NILFS_BMAP_I(btree)->i_btnode_cache;
+ struct buffer_head *bh, *ra_bh;
+ sector_t submit_ptr = 0;
+ int ret;
+
+ ret = nilfs_btnode_submit_block(btnc, ptr, 0, READ, &bh, &submit_ptr);
+ if (ret) {
+ if (ret != -EEXIST)
+ return ret;
+ goto out_check;
+ }
+
+ if (ra) {
+ int i, n;
+ __u64 ptr2;
+
+ /* read ahead sibling nodes */
+ for (n = ra->max_ra_blocks, i = ra->index + 1;
+ n > 0 && i < ra->ncmax; n--, i++) {
+ ptr2 = nilfs_btree_node_get_ptr(ra->node, i, ra->ncmax);
+
+ ret = nilfs_btnode_submit_block(btnc, ptr2, 0, READA,
+ &ra_bh, &submit_ptr);
+ if (likely(!ret || ret == -EEXIST))
+ brelse(ra_bh);
+ else if (ret != -EBUSY)
+ break;
+ if (!buffer_locked(bh))
+ goto out_no_wait;
+ }
+ }
+
+ wait_on_buffer(bh);
+
+ out_no_wait:
+ if (!buffer_uptodate(bh)) {
+ brelse(bh);
+ return -EIO;
+ }
+
+ out_check:
+ if (nilfs_btree_broken_node_block(bh)) {
+ clear_buffer_uptodate(bh);
+ brelse(bh);
+ return -EINVAL;
+ }
+
+ *bhp = bh;
+ return 0;
+}
+
+static int nilfs_btree_get_block(const struct nilfs_bmap *btree, __u64 ptr,
+ struct buffer_head **bhp)
{
- return (level == nilfs_btree_height(btree) - 1) ?
- nilfs_btree_get_root(btree) :
- nilfs_btree_get_nonroot_node(path, level);
+ return __nilfs_btree_get_block(btree, ptr, bhp, NULL);
}
-static int nilfs_btree_do_lookup(const struct nilfs_btree *btree,
+static int nilfs_btree_do_lookup(const struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
- __u64 key, __u64 *ptrp, int minlevel)
+ __u64 key, __u64 *ptrp, int minlevel,
+ int readahead)
{
struct nilfs_btree_node *node;
+ struct nilfs_btree_readahead_info p, *ra;
__u64 ptr;
- int level, index, found, ret;
+ int level, index, found, ncmax, ret;
node = nilfs_btree_get_root(btree);
level = nilfs_btree_node_get_level(node);
return -ENOENT;
found = nilfs_btree_node_lookup(node, key, &index);
- ptr = nilfs_btree_node_get_ptr(btree, node, index);
+ ptr = nilfs_btree_node_get_ptr(node, index,
+ NILFS_BTREE_ROOT_NCHILDREN_MAX);
path[level].bp_bh = NULL;
path[level].bp_index = index;
- for (level--; level >= minlevel; level--) {
- ret = nilfs_btree_get_block(btree, ptr, &path[level].bp_bh);
+ ncmax = nilfs_btree_nchildren_per_block(btree);
+
+ while (--level >= minlevel) {
+ ra = NULL;
+ if (level == NILFS_BTREE_LEVEL_NODE_MIN && readahead) {
+ p.node = nilfs_btree_get_node(btree, path, level + 1,
+ &p.ncmax);
+ p.index = index;
+ p.max_ra_blocks = 7;
+ ra = &p;
+ }
+ ret = __nilfs_btree_get_block(btree, ptr, &path[level].bp_bh,
+ ra);
if (ret < 0)
return ret;
+
node = nilfs_btree_get_nonroot_node(path, level);
- BUG_ON(level != nilfs_btree_node_get_level(node));
+ if (nilfs_btree_bad_node(node, level))
+ return -EINVAL;
if (!found)
found = nilfs_btree_node_lookup(node, key, &index);
else
index = 0;
- if (index < nilfs_btree_node_nchildren_max(node, btree))
- ptr = nilfs_btree_node_get_ptr(btree, node, index);
- else {
+ if (index < ncmax) {
+ ptr = nilfs_btree_node_get_ptr(node, index, ncmax);
+ } else {
WARN_ON(found || level != NILFS_BTREE_LEVEL_NODE_MIN);
/* insert */
ptr = NILFS_BMAP_INVALID_PTR;
return 0;
}
-static int nilfs_btree_do_lookup_last(const struct nilfs_btree *btree,
+static int nilfs_btree_do_lookup_last(const struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
__u64 *keyp, __u64 *ptrp)
{
struct nilfs_btree_node *node;
__u64 ptr;
- int index, level, ret;
+ int index, level, ncmax, ret;
node = nilfs_btree_get_root(btree);
index = nilfs_btree_node_get_nchildren(node) - 1;
if (index < 0)
return -ENOENT;
level = nilfs_btree_node_get_level(node);
- ptr = nilfs_btree_node_get_ptr(btree, node, index);
+ ptr = nilfs_btree_node_get_ptr(node, index,
+ NILFS_BTREE_ROOT_NCHILDREN_MAX);
path[level].bp_bh = NULL;
path[level].bp_index = index;
+ ncmax = nilfs_btree_nchildren_per_block(btree);
for (level--; level > 0; level--) {
ret = nilfs_btree_get_block(btree, ptr, &path[level].bp_bh);
if (ret < 0)
return ret;
node = nilfs_btree_get_nonroot_node(path, level);
- BUG_ON(level != nilfs_btree_node_get_level(node));
+ if (nilfs_btree_bad_node(node, level))
+ return -EINVAL;
index = nilfs_btree_node_get_nchildren(node) - 1;
- ptr = nilfs_btree_node_get_ptr(btree, node, index);
+ ptr = nilfs_btree_node_get_ptr(node, index, ncmax);
path[level].bp_index = index;
}
return 0;
}
-static int nilfs_btree_lookup(const struct nilfs_bmap *bmap,
+static int nilfs_btree_lookup(const struct nilfs_bmap *btree,
__u64 key, int level, __u64 *ptrp)
{
- struct nilfs_btree *btree;
struct nilfs_btree_path *path;
- __u64 ptr;
int ret;
- btree = (struct nilfs_btree *)bmap;
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);
+ ret = nilfs_btree_do_lookup(btree, path, key, ptrp, level, 0);
- if (ptrp != NULL)
- *ptrp = ptr;
-
- nilfs_btree_release_path(path);
nilfs_btree_free_path(path);
return ret;
}
-static int nilfs_btree_lookup_contig(const struct nilfs_bmap *bmap,
+static int nilfs_btree_lookup_contig(const struct nilfs_bmap *btree,
__u64 key, __u64 *ptrp, unsigned maxblocks)
{
- struct nilfs_btree *btree = (struct nilfs_btree *)bmap;
struct nilfs_btree_path *path;
struct nilfs_btree_node *node;
struct inode *dat = NULL;
__u64 ptr, ptr2;
sector_t blocknr;
int level = NILFS_BTREE_LEVEL_NODE_MIN;
- int ret, cnt, index, maxlevel;
+ int ret, cnt, index, maxlevel, ncmax;
+ struct nilfs_btree_readahead_info p;
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);
+
+ ret = nilfs_btree_do_lookup(btree, path, key, &ptr, level, 1);
if (ret < 0)
goto out;
- if (NILFS_BMAP_USE_VBN(bmap)) {
- dat = nilfs_bmap_get_dat(bmap);
+ if (NILFS_BMAP_USE_VBN(btree)) {
+ dat = nilfs_bmap_get_dat(btree);
ret = nilfs_dat_translate(dat, ptr, &blocknr);
if (ret < 0)
goto out;
goto end;
maxlevel = nilfs_btree_height(btree) - 1;
- node = nilfs_btree_get_node(btree, path, level);
+ node = nilfs_btree_get_node(btree, path, level, &ncmax);
index = path[level].bp_index + 1;
for (;;) {
while (index < nilfs_btree_node_get_nchildren(node)) {
if (nilfs_btree_node_get_key(node, index) !=
key + cnt)
goto end;
- ptr2 = nilfs_btree_node_get_ptr(btree, node, index);
+ ptr2 = nilfs_btree_node_get_ptr(node, index, ncmax);
if (dat) {
ret = nilfs_dat_translate(dat, ptr2, &blocknr);
if (ret < 0)
break;
/* look-up right sibling node */
- node = nilfs_btree_get_node(btree, path, level + 1);
- index = path[level + 1].bp_index + 1;
- if (index >= nilfs_btree_node_get_nchildren(node) ||
- nilfs_btree_node_get_key(node, index) != key + cnt)
+ p.node = nilfs_btree_get_node(btree, path, level + 1, &p.ncmax);
+ p.index = path[level + 1].bp_index + 1;
+ p.max_ra_blocks = 7;
+ if (p.index >= nilfs_btree_node_get_nchildren(p.node) ||
+ nilfs_btree_node_get_key(p.node, p.index) != key + cnt)
break;
- ptr2 = nilfs_btree_node_get_ptr(btree, node, index);
- path[level + 1].bp_index = index;
+ ptr2 = nilfs_btree_node_get_ptr(p.node, p.index, p.ncmax);
+ path[level + 1].bp_index = p.index;
brelse(path[level].bp_bh);
path[level].bp_bh = NULL;
- ret = nilfs_btree_get_block(btree, ptr2, &path[level].bp_bh);
+
+ ret = __nilfs_btree_get_block(btree, ptr2, &path[level].bp_bh,
+ &p);
if (ret < 0)
goto out;
node = nilfs_btree_get_nonroot_node(path, level);
+ ncmax = nilfs_btree_nchildren_per_block(btree);
index = 0;
path[level].bp_index = index;
}
*ptrp = ptr;
ret = cnt;
out:
- nilfs_btree_release_path(path);
nilfs_btree_free_path(path);
return ret;
}
-static void nilfs_btree_promote_key(struct nilfs_btree *btree,
+static void nilfs_btree_promote_key(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int level, __u64 key)
{
if (level < nilfs_btree_height(btree) - 1) {
do {
- lock_buffer(path[level].bp_bh);
nilfs_btree_node_set_key(
nilfs_btree_get_nonroot_node(path, level),
path[level].bp_index, key);
if (!buffer_dirty(path[level].bp_bh))
nilfs_btnode_mark_dirty(path[level].bp_bh);
- unlock_buffer(path[level].bp_bh);
} while ((path[level].bp_index == 0) &&
(++level < nilfs_btree_height(btree) - 1));
}
}
}
-static void nilfs_btree_do_insert(struct nilfs_btree *btree,
+static void nilfs_btree_do_insert(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int level, __u64 *keyp, __u64 *ptrp)
{
struct nilfs_btree_node *node;
+ int ncblk;
if (level < nilfs_btree_height(btree) - 1) {
- lock_buffer(path[level].bp_bh);
node = nilfs_btree_get_nonroot_node(path, level);
- nilfs_btree_node_insert(btree, node, *keyp, *ptrp,
- path[level].bp_index);
+ ncblk = nilfs_btree_nchildren_per_block(btree);
+ nilfs_btree_node_insert(node, path[level].bp_index,
+ *keyp, *ptrp, ncblk);
if (!buffer_dirty(path[level].bp_bh))
nilfs_btnode_mark_dirty(path[level].bp_bh);
- unlock_buffer(path[level].bp_bh);
if (path[level].bp_index == 0)
nilfs_btree_promote_key(btree, path, level + 1,
0));
} else {
node = nilfs_btree_get_root(btree);
- nilfs_btree_node_insert(btree, node, *keyp, *ptrp,
- path[level].bp_index);
+ nilfs_btree_node_insert(node, path[level].bp_index,
+ *keyp, *ptrp,
+ NILFS_BTREE_ROOT_NCHILDREN_MAX);
}
}
-static void nilfs_btree_carry_left(struct nilfs_btree *btree,
+static void nilfs_btree_carry_left(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int level, __u64 *keyp, __u64 *ptrp)
{
struct nilfs_btree_node *node, *left;
- int nchildren, lnchildren, n, move;
-
- lock_buffer(path[level].bp_bh);
- lock_buffer(path[level].bp_sib_bh);
+ int nchildren, lnchildren, n, move, ncblk;
node = nilfs_btree_get_nonroot_node(path, level);
left = nilfs_btree_get_sib_node(path, level);
nchildren = nilfs_btree_node_get_nchildren(node);
lnchildren = nilfs_btree_node_get_nchildren(left);
+ ncblk = nilfs_btree_nchildren_per_block(btree);
move = 0;
n = (nchildren + lnchildren + 1) / 2 - lnchildren;
move = 1;
}
- nilfs_btree_node_move_left(btree, left, node, n);
+ nilfs_btree_node_move_left(left, node, n, ncblk, ncblk);
if (!buffer_dirty(path[level].bp_bh))
nilfs_btnode_mark_dirty(path[level].bp_bh);
if (!buffer_dirty(path[level].bp_sib_bh))
nilfs_btnode_mark_dirty(path[level].bp_sib_bh);
- unlock_buffer(path[level].bp_bh);
- unlock_buffer(path[level].bp_sib_bh);
-
nilfs_btree_promote_key(btree, path, level + 1,
nilfs_btree_node_get_key(node, 0));
nilfs_btree_do_insert(btree, path, level, keyp, ptrp);
}
-static void nilfs_btree_carry_right(struct nilfs_btree *btree,
+static void nilfs_btree_carry_right(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int level, __u64 *keyp, __u64 *ptrp)
{
struct nilfs_btree_node *node, *right;
- int nchildren, rnchildren, n, move;
-
- lock_buffer(path[level].bp_bh);
- lock_buffer(path[level].bp_sib_bh);
+ int nchildren, rnchildren, n, move, ncblk;
node = nilfs_btree_get_nonroot_node(path, level);
right = nilfs_btree_get_sib_node(path, level);
nchildren = nilfs_btree_node_get_nchildren(node);
rnchildren = nilfs_btree_node_get_nchildren(right);
+ ncblk = nilfs_btree_nchildren_per_block(btree);
move = 0;
n = (nchildren + rnchildren + 1) / 2 - rnchildren;
move = 1;
}
- nilfs_btree_node_move_right(btree, node, right, n);
+ nilfs_btree_node_move_right(node, right, n, ncblk, ncblk);
if (!buffer_dirty(path[level].bp_bh))
nilfs_btnode_mark_dirty(path[level].bp_bh);
if (!buffer_dirty(path[level].bp_sib_bh))
nilfs_btnode_mark_dirty(path[level].bp_sib_bh);
- unlock_buffer(path[level].bp_bh);
- unlock_buffer(path[level].bp_sib_bh);
-
path[level + 1].bp_index++;
nilfs_btree_promote_key(btree, path, level + 1,
nilfs_btree_node_get_key(right, 0));
nilfs_btree_do_insert(btree, path, level, keyp, ptrp);
}
-static void nilfs_btree_split(struct nilfs_btree *btree,
+static void nilfs_btree_split(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int level, __u64 *keyp, __u64 *ptrp)
{
struct nilfs_btree_node *node, *right;
__u64 newkey;
__u64 newptr;
- int nchildren, n, move;
-
- lock_buffer(path[level].bp_bh);
- lock_buffer(path[level].bp_sib_bh);
+ int nchildren, n, move, ncblk;
node = nilfs_btree_get_nonroot_node(path, level);
right = nilfs_btree_get_sib_node(path, level);
nchildren = nilfs_btree_node_get_nchildren(node);
+ ncblk = nilfs_btree_nchildren_per_block(btree);
move = 0;
n = (nchildren + 1) / 2;
move = 1;
}
- nilfs_btree_node_move_right(btree, node, right, n);
+ nilfs_btree_node_move_right(node, right, n, ncblk, ncblk);
if (!buffer_dirty(path[level].bp_bh))
nilfs_btnode_mark_dirty(path[level].bp_bh);
if (!buffer_dirty(path[level].bp_sib_bh))
nilfs_btnode_mark_dirty(path[level].bp_sib_bh);
- unlock_buffer(path[level].bp_bh);
- unlock_buffer(path[level].bp_sib_bh);
-
newkey = nilfs_btree_node_get_key(right, 0);
newptr = path[level].bp_newreq.bpr_ptr;
if (move) {
path[level].bp_index -= nilfs_btree_node_get_nchildren(node);
- nilfs_btree_node_insert(btree, right, *keyp, *ptrp,
- path[level].bp_index);
+ nilfs_btree_node_insert(right, path[level].bp_index,
+ *keyp, *ptrp, ncblk);
*keyp = nilfs_btree_node_get_key(right, 0);
*ptrp = path[level].bp_newreq.bpr_ptr;
path[level + 1].bp_index++;
}
-static void nilfs_btree_grow(struct nilfs_btree *btree,
+static void nilfs_btree_grow(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int level, __u64 *keyp, __u64 *ptrp)
{
struct nilfs_btree_node *root, *child;
- int n;
-
- lock_buffer(path[level].bp_sib_bh);
+ int n, ncblk;
root = nilfs_btree_get_root(btree);
child = nilfs_btree_get_sib_node(path, level);
+ ncblk = nilfs_btree_nchildren_per_block(btree);
n = nilfs_btree_node_get_nchildren(root);
- nilfs_btree_node_move_right(btree, root, child, n);
+ nilfs_btree_node_move_right(root, child, n,
+ NILFS_BTREE_ROOT_NCHILDREN_MAX, ncblk);
nilfs_btree_node_set_level(root, level + 1);
if (!buffer_dirty(path[level].bp_sib_bh))
nilfs_btnode_mark_dirty(path[level].bp_sib_bh);
- unlock_buffer(path[level].bp_sib_bh);
-
path[level].bp_bh = path[level].bp_sib_bh;
path[level].bp_sib_bh = NULL;
*ptrp = path[level].bp_newreq.bpr_ptr;
}
-static __u64 nilfs_btree_find_near(const struct nilfs_btree *btree,
+static __u64 nilfs_btree_find_near(const struct nilfs_bmap *btree,
const struct nilfs_btree_path *path)
{
struct nilfs_btree_node *node;
- int level;
+ int level, ncmax;
if (path == NULL)
return NILFS_BMAP_INVALID_PTR;
/* left sibling */
level = NILFS_BTREE_LEVEL_NODE_MIN;
if (path[level].bp_index > 0) {
- node = nilfs_btree_get_node(btree, path, level);
- return nilfs_btree_node_get_ptr(btree, node,
- path[level].bp_index - 1);
+ node = nilfs_btree_get_node(btree, path, level, &ncmax);
+ return nilfs_btree_node_get_ptr(node,
+ path[level].bp_index - 1,
+ ncmax);
}
/* parent */
level = NILFS_BTREE_LEVEL_NODE_MIN + 1;
if (level <= nilfs_btree_height(btree) - 1) {
- node = nilfs_btree_get_node(btree, path, level);
- return nilfs_btree_node_get_ptr(btree, node,
- path[level].bp_index);
+ node = nilfs_btree_get_node(btree, path, level, &ncmax);
+ return nilfs_btree_node_get_ptr(node, path[level].bp_index,
+ ncmax);
}
return NILFS_BMAP_INVALID_PTR;
}
-static __u64 nilfs_btree_find_target_v(const struct nilfs_btree *btree,
+static __u64 nilfs_btree_find_target_v(const struct nilfs_bmap *btree,
const struct nilfs_btree_path *path,
__u64 key)
{
__u64 ptr;
- ptr = nilfs_bmap_find_target_seq(&btree->bt_bmap, key);
+ ptr = nilfs_bmap_find_target_seq(btree, key);
if (ptr != NILFS_BMAP_INVALID_PTR)
/* sequential access */
return ptr;
return ptr;
}
/* block group */
- return nilfs_bmap_find_target_in_group(&btree->bt_bmap);
+ return nilfs_bmap_find_target_in_group(btree);
}
-static void nilfs_btree_set_target_v(struct nilfs_btree *btree, __u64 key,
- __u64 ptr)
-{
- btree->bt_bmap.b_last_allocated_key = key;
- btree->bt_bmap.b_last_allocated_ptr = ptr;
-}
-
-static int nilfs_btree_prepare_insert(struct nilfs_btree *btree,
+static int nilfs_btree_prepare_insert(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int *levelp, __u64 key, __u64 ptr,
struct nilfs_bmap_stats *stats)
struct buffer_head *bh;
struct nilfs_btree_node *node, *parent, *sib;
__u64 sibptr;
- int pindex, level, ret;
+ int pindex, level, ncmax, ncblk, ret;
struct inode *dat = NULL;
stats->bs_nblocks = 0;
level = NILFS_BTREE_LEVEL_DATA;
/* allocate a new ptr for data block */
- if (NILFS_BMAP_USE_VBN(&btree->bt_bmap)) {
+ if (NILFS_BMAP_USE_VBN(btree)) {
path[level].bp_newreq.bpr_ptr =
nilfs_btree_find_target_v(btree, path, key);
- dat = nilfs_bmap_get_dat(&btree->bt_bmap);
+ dat = nilfs_bmap_get_dat(btree);
}
- ret = nilfs_bmap_prepare_alloc_ptr(&btree->bt_bmap,
- &path[level].bp_newreq, dat);
+ ret = nilfs_bmap_prepare_alloc_ptr(btree, &path[level].bp_newreq, dat);
if (ret < 0)
goto err_out_data;
+ ncblk = nilfs_btree_nchildren_per_block(btree);
+
for (level = NILFS_BTREE_LEVEL_NODE_MIN;
level < nilfs_btree_height(btree) - 1;
level++) {
node = nilfs_btree_get_nonroot_node(path, level);
- if (nilfs_btree_node_get_nchildren(node) <
- nilfs_btree_node_nchildren_max(node, btree)) {
+ if (nilfs_btree_node_get_nchildren(node) < ncblk) {
path[level].bp_op = nilfs_btree_do_insert;
stats->bs_nblocks++;
goto out;
}
- parent = nilfs_btree_get_node(btree, path, level + 1);
+ parent = nilfs_btree_get_node(btree, path, level + 1, &ncmax);
pindex = path[level + 1].bp_index;
/* left sibling */
if (pindex > 0) {
- sibptr = nilfs_btree_node_get_ptr(btree, parent,
- pindex - 1);
+ sibptr = nilfs_btree_node_get_ptr(parent, pindex - 1,
+ ncmax);
ret = nilfs_btree_get_block(btree, sibptr, &bh);
if (ret < 0)
goto err_out_child_node;
sib = (struct nilfs_btree_node *)bh->b_data;
- if (nilfs_btree_node_get_nchildren(sib) <
- nilfs_btree_node_nchildren_max(sib, btree)) {
+ if (nilfs_btree_node_get_nchildren(sib) < ncblk) {
path[level].bp_sib_bh = bh;
path[level].bp_op = nilfs_btree_carry_left;
stats->bs_nblocks++;
goto out;
- } else
+ } else {
brelse(bh);
+ }
}
/* right sibling */
- if (pindex <
- nilfs_btree_node_get_nchildren(parent) - 1) {
- sibptr = nilfs_btree_node_get_ptr(btree, parent,
- pindex + 1);
+ if (pindex < nilfs_btree_node_get_nchildren(parent) - 1) {
+ sibptr = nilfs_btree_node_get_ptr(parent, pindex + 1,
+ ncmax);
ret = nilfs_btree_get_block(btree, sibptr, &bh);
if (ret < 0)
goto err_out_child_node;
sib = (struct nilfs_btree_node *)bh->b_data;
- if (nilfs_btree_node_get_nchildren(sib) <
- nilfs_btree_node_nchildren_max(sib, btree)) {
+ if (nilfs_btree_node_get_nchildren(sib) < ncblk) {
path[level].bp_sib_bh = bh;
path[level].bp_op = nilfs_btree_carry_right;
stats->bs_nblocks++;
goto out;
- } else
+ } else {
brelse(bh);
+ }
}
/* split */
path[level].bp_newreq.bpr_ptr =
path[level - 1].bp_newreq.bpr_ptr + 1;
- ret = nilfs_bmap_prepare_alloc_ptr(&btree->bt_bmap,
+ ret = nilfs_bmap_prepare_alloc_ptr(btree,
&path[level].bp_newreq, dat);
if (ret < 0)
goto err_out_child_node;
stats->bs_nblocks++;
- lock_buffer(bh);
- nilfs_btree_node_init(btree,
- (struct nilfs_btree_node *)bh->b_data,
- 0, level, 0, NULL, NULL);
- unlock_buffer(bh);
+ sib = (struct nilfs_btree_node *)bh->b_data;
+ nilfs_btree_node_init(sib, 0, level, 0, ncblk, NULL, NULL);
path[level].bp_sib_bh = bh;
path[level].bp_op = nilfs_btree_split;
}
/* root */
node = nilfs_btree_get_root(btree);
if (nilfs_btree_node_get_nchildren(node) <
- nilfs_btree_node_nchildren_max(node, btree)) {
+ NILFS_BTREE_ROOT_NCHILDREN_MAX) {
path[level].bp_op = nilfs_btree_do_insert;
stats->bs_nblocks++;
goto out;
/* grow */
path[level].bp_newreq.bpr_ptr = path[level - 1].bp_newreq.bpr_ptr + 1;
- ret = nilfs_bmap_prepare_alloc_ptr(&btree->bt_bmap,
- &path[level].bp_newreq, dat);
+ ret = nilfs_bmap_prepare_alloc_ptr(btree, &path[level].bp_newreq, dat);
if (ret < 0)
goto err_out_child_node;
ret = nilfs_btree_get_new_block(btree, path[level].bp_newreq.bpr_ptr,
if (ret < 0)
goto err_out_curr_node;
- lock_buffer(bh);
- nilfs_btree_node_init(btree, (struct nilfs_btree_node *)bh->b_data,
- 0, level, 0, NULL, NULL);
- unlock_buffer(bh);
+ nilfs_btree_node_init((struct nilfs_btree_node *)bh->b_data,
+ 0, level, 0, ncblk, NULL, NULL);
path[level].bp_sib_bh = bh;
path[level].bp_op = nilfs_btree_grow;
/* error */
err_out_curr_node:
- nilfs_bmap_abort_alloc_ptr(&btree->bt_bmap, &path[level].bp_newreq,
- dat);
+ nilfs_bmap_abort_alloc_ptr(btree, &path[level].bp_newreq, dat);
err_out_child_node:
for (level--; level > NILFS_BTREE_LEVEL_DATA; level--) {
nilfs_btnode_delete(path[level].bp_sib_bh);
- nilfs_bmap_abort_alloc_ptr(&btree->bt_bmap,
- &path[level].bp_newreq, dat);
+ nilfs_bmap_abort_alloc_ptr(btree, &path[level].bp_newreq, dat);
}
- nilfs_bmap_abort_alloc_ptr(&btree->bt_bmap, &path[level].bp_newreq,
- dat);
+ nilfs_bmap_abort_alloc_ptr(btree, &path[level].bp_newreq, dat);
err_out_data:
*levelp = level;
stats->bs_nblocks = 0;
return ret;
}
-static void nilfs_btree_commit_insert(struct nilfs_btree *btree,
+static void nilfs_btree_commit_insert(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int maxlevel, __u64 key, __u64 ptr)
{
set_buffer_nilfs_volatile((struct buffer_head *)((unsigned long)ptr));
ptr = path[NILFS_BTREE_LEVEL_DATA].bp_newreq.bpr_ptr;
- if (NILFS_BMAP_USE_VBN(&btree->bt_bmap)) {
- nilfs_btree_set_target_v(btree, key, ptr);
- dat = nilfs_bmap_get_dat(&btree->bt_bmap);
+ if (NILFS_BMAP_USE_VBN(btree)) {
+ nilfs_bmap_set_target_v(btree, key, ptr);
+ dat = nilfs_bmap_get_dat(btree);
}
for (level = NILFS_BTREE_LEVEL_NODE_MIN; level <= maxlevel; level++) {
- nilfs_bmap_commit_alloc_ptr(&btree->bt_bmap,
+ nilfs_bmap_commit_alloc_ptr(btree,
&path[level - 1].bp_newreq, dat);
path[level].bp_op(btree, path, level, &key, &ptr);
}
- if (!nilfs_bmap_dirty(&btree->bt_bmap))
- nilfs_bmap_set_dirty(&btree->bt_bmap);
+ if (!nilfs_bmap_dirty(btree))
+ nilfs_bmap_set_dirty(btree);
}
-static int nilfs_btree_insert(struct nilfs_bmap *bmap, __u64 key, __u64 ptr)
+static int nilfs_btree_insert(struct nilfs_bmap *btree, __u64 key, __u64 ptr)
{
- struct nilfs_btree *btree;
struct nilfs_btree_path *path;
struct nilfs_bmap_stats stats;
int level, ret;
- btree = (struct nilfs_btree *)bmap;
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_BTREE_LEVEL_NODE_MIN, 0);
if (ret != -ENOENT) {
if (ret == 0)
ret = -EEXIST;
if (ret < 0)
goto out;
nilfs_btree_commit_insert(btree, path, level, key, ptr);
- nilfs_bmap_add_blocks(bmap, stats.bs_nblocks);
+ nilfs_bmap_add_blocks(btree, stats.bs_nblocks);
out:
- nilfs_btree_release_path(path);
nilfs_btree_free_path(path);
return ret;
}
-static void nilfs_btree_do_delete(struct nilfs_btree *btree,
+static void nilfs_btree_do_delete(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int level, __u64 *keyp, __u64 *ptrp)
{
struct nilfs_btree_node *node;
+ int ncblk;
if (level < nilfs_btree_height(btree) - 1) {
- lock_buffer(path[level].bp_bh);
node = nilfs_btree_get_nonroot_node(path, level);
- nilfs_btree_node_delete(btree, node, keyp, ptrp,
- path[level].bp_index);
+ ncblk = nilfs_btree_nchildren_per_block(btree);
+ nilfs_btree_node_delete(node, path[level].bp_index,
+ keyp, ptrp, ncblk);
if (!buffer_dirty(path[level].bp_bh))
nilfs_btnode_mark_dirty(path[level].bp_bh);
- unlock_buffer(path[level].bp_bh);
if (path[level].bp_index == 0)
nilfs_btree_promote_key(btree, path, level + 1,
nilfs_btree_node_get_key(node, 0));
} else {
node = nilfs_btree_get_root(btree);
- nilfs_btree_node_delete(btree, node, keyp, ptrp,
- path[level].bp_index);
+ nilfs_btree_node_delete(node, path[level].bp_index,
+ keyp, ptrp,
+ NILFS_BTREE_ROOT_NCHILDREN_MAX);
}
}
-static void nilfs_btree_borrow_left(struct nilfs_btree *btree,
+static void nilfs_btree_borrow_left(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int level, __u64 *keyp, __u64 *ptrp)
{
struct nilfs_btree_node *node, *left;
- int nchildren, lnchildren, n;
+ int nchildren, lnchildren, n, ncblk;
nilfs_btree_do_delete(btree, path, level, keyp, ptrp);
- lock_buffer(path[level].bp_bh);
- lock_buffer(path[level].bp_sib_bh);
-
node = nilfs_btree_get_nonroot_node(path, level);
left = nilfs_btree_get_sib_node(path, level);
nchildren = nilfs_btree_node_get_nchildren(node);
lnchildren = nilfs_btree_node_get_nchildren(left);
+ ncblk = nilfs_btree_nchildren_per_block(btree);
n = (nchildren + lnchildren) / 2 - nchildren;
- nilfs_btree_node_move_right(btree, left, node, n);
+ nilfs_btree_node_move_right(left, node, n, ncblk, ncblk);
if (!buffer_dirty(path[level].bp_bh))
nilfs_btnode_mark_dirty(path[level].bp_bh);
if (!buffer_dirty(path[level].bp_sib_bh))
nilfs_btnode_mark_dirty(path[level].bp_sib_bh);
- unlock_buffer(path[level].bp_bh);
- unlock_buffer(path[level].bp_sib_bh);
-
nilfs_btree_promote_key(btree, path, level + 1,
nilfs_btree_node_get_key(node, 0));
path[level].bp_index += n;
}
-static void nilfs_btree_borrow_right(struct nilfs_btree *btree,
+static void nilfs_btree_borrow_right(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int level, __u64 *keyp, __u64 *ptrp)
{
struct nilfs_btree_node *node, *right;
- int nchildren, rnchildren, n;
+ int nchildren, rnchildren, n, ncblk;
nilfs_btree_do_delete(btree, path, level, keyp, ptrp);
- lock_buffer(path[level].bp_bh);
- lock_buffer(path[level].bp_sib_bh);
-
node = nilfs_btree_get_nonroot_node(path, level);
right = nilfs_btree_get_sib_node(path, level);
nchildren = nilfs_btree_node_get_nchildren(node);
rnchildren = nilfs_btree_node_get_nchildren(right);
+ ncblk = nilfs_btree_nchildren_per_block(btree);
n = (nchildren + rnchildren) / 2 - nchildren;
- nilfs_btree_node_move_left(btree, node, right, n);
+ nilfs_btree_node_move_left(node, right, n, ncblk, ncblk);
if (!buffer_dirty(path[level].bp_bh))
nilfs_btnode_mark_dirty(path[level].bp_bh);
if (!buffer_dirty(path[level].bp_sib_bh))
nilfs_btnode_mark_dirty(path[level].bp_sib_bh);
- unlock_buffer(path[level].bp_bh);
- unlock_buffer(path[level].bp_sib_bh);
-
path[level + 1].bp_index++;
nilfs_btree_promote_key(btree, path, level + 1,
nilfs_btree_node_get_key(right, 0));
path[level].bp_sib_bh = NULL;
}
-static void nilfs_btree_concat_left(struct nilfs_btree *btree,
+static void nilfs_btree_concat_left(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int level, __u64 *keyp, __u64 *ptrp)
{
struct nilfs_btree_node *node, *left;
- int n;
+ int n, ncblk;
nilfs_btree_do_delete(btree, path, level, keyp, ptrp);
- lock_buffer(path[level].bp_bh);
- lock_buffer(path[level].bp_sib_bh);
-
node = nilfs_btree_get_nonroot_node(path, level);
left = nilfs_btree_get_sib_node(path, level);
+ ncblk = nilfs_btree_nchildren_per_block(btree);
n = nilfs_btree_node_get_nchildren(node);
- nilfs_btree_node_move_left(btree, left, node, n);
+ nilfs_btree_node_move_left(left, node, n, ncblk, ncblk);
if (!buffer_dirty(path[level].bp_sib_bh))
nilfs_btnode_mark_dirty(path[level].bp_sib_bh);
- unlock_buffer(path[level].bp_bh);
- unlock_buffer(path[level].bp_sib_bh);
-
nilfs_btnode_delete(path[level].bp_bh);
path[level].bp_bh = path[level].bp_sib_bh;
path[level].bp_sib_bh = NULL;
path[level].bp_index += nilfs_btree_node_get_nchildren(left);
}
-static void nilfs_btree_concat_right(struct nilfs_btree *btree,
+static void nilfs_btree_concat_right(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int level, __u64 *keyp, __u64 *ptrp)
{
struct nilfs_btree_node *node, *right;
- int n;
+ int n, ncblk;
nilfs_btree_do_delete(btree, path, level, keyp, ptrp);
- lock_buffer(path[level].bp_bh);
- lock_buffer(path[level].bp_sib_bh);
-
node = nilfs_btree_get_nonroot_node(path, level);
right = nilfs_btree_get_sib_node(path, level);
+ ncblk = nilfs_btree_nchildren_per_block(btree);
n = nilfs_btree_node_get_nchildren(right);
- nilfs_btree_node_move_left(btree, node, right, n);
+ nilfs_btree_node_move_left(node, right, n, ncblk, ncblk);
if (!buffer_dirty(path[level].bp_bh))
nilfs_btnode_mark_dirty(path[level].bp_bh);
- unlock_buffer(path[level].bp_bh);
- unlock_buffer(path[level].bp_sib_bh);
-
nilfs_btnode_delete(path[level].bp_sib_bh);
path[level].bp_sib_bh = NULL;
path[level + 1].bp_index++;
}
-static void nilfs_btree_shrink(struct nilfs_btree *btree,
+static void nilfs_btree_shrink(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int level, __u64 *keyp, __u64 *ptrp)
{
struct nilfs_btree_node *root, *child;
- int n;
+ int n, ncblk;
nilfs_btree_do_delete(btree, path, level, keyp, ptrp);
- lock_buffer(path[level].bp_bh);
root = nilfs_btree_get_root(btree);
child = nilfs_btree_get_nonroot_node(path, level);
+ ncblk = nilfs_btree_nchildren_per_block(btree);
- nilfs_btree_node_delete(btree, root, NULL, NULL, 0);
+ nilfs_btree_node_delete(root, 0, NULL, NULL,
+ NILFS_BTREE_ROOT_NCHILDREN_MAX);
nilfs_btree_node_set_level(root, level);
n = nilfs_btree_node_get_nchildren(child);
- nilfs_btree_node_move_left(btree, root, child, n);
- unlock_buffer(path[level].bp_bh);
+ nilfs_btree_node_move_left(root, child, n,
+ NILFS_BTREE_ROOT_NCHILDREN_MAX, ncblk);
nilfs_btnode_delete(path[level].bp_bh);
path[level].bp_bh = NULL;
}
-static int nilfs_btree_prepare_delete(struct nilfs_btree *btree,
+static int nilfs_btree_prepare_delete(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int *levelp,
struct nilfs_bmap_stats *stats,
struct buffer_head *bh;
struct nilfs_btree_node *node, *parent, *sib;
__u64 sibptr;
- int pindex, level, ret;
+ int pindex, level, ncmin, ncmax, ncblk, ret;
ret = 0;
stats->bs_nblocks = 0;
+ ncmin = NILFS_BTREE_NODE_NCHILDREN_MIN(nilfs_btree_node_size(btree));
+ ncblk = nilfs_btree_nchildren_per_block(btree);
+
for (level = NILFS_BTREE_LEVEL_NODE_MIN;
level < nilfs_btree_height(btree) - 1;
level++) {
node = nilfs_btree_get_nonroot_node(path, level);
path[level].bp_oldreq.bpr_ptr =
- nilfs_btree_node_get_ptr(btree, node,
- path[level].bp_index);
- ret = nilfs_bmap_prepare_end_ptr(&btree->bt_bmap,
+ nilfs_btree_node_get_ptr(node, path[level].bp_index,
+ ncblk);
+ ret = nilfs_bmap_prepare_end_ptr(btree,
&path[level].bp_oldreq, dat);
if (ret < 0)
goto err_out_child_node;
- if (nilfs_btree_node_get_nchildren(node) >
- nilfs_btree_node_nchildren_min(node, btree)) {
+ if (nilfs_btree_node_get_nchildren(node) > ncmin) {
path[level].bp_op = nilfs_btree_do_delete;
stats->bs_nblocks++;
goto out;
}
- parent = nilfs_btree_get_node(btree, path, level + 1);
+ parent = nilfs_btree_get_node(btree, path, level + 1, &ncmax);
pindex = path[level + 1].bp_index;
if (pindex > 0) {
/* left sibling */
- sibptr = nilfs_btree_node_get_ptr(btree, parent,
- pindex - 1);
+ sibptr = nilfs_btree_node_get_ptr(parent, pindex - 1,
+ ncmax);
ret = nilfs_btree_get_block(btree, sibptr, &bh);
if (ret < 0)
goto err_out_curr_node;
sib = (struct nilfs_btree_node *)bh->b_data;
- if (nilfs_btree_node_get_nchildren(sib) >
- nilfs_btree_node_nchildren_min(sib, btree)) {
+ if (nilfs_btree_node_get_nchildren(sib) > ncmin) {
path[level].bp_sib_bh = bh;
path[level].bp_op = nilfs_btree_borrow_left;
stats->bs_nblocks++;
} else if (pindex <
nilfs_btree_node_get_nchildren(parent) - 1) {
/* right sibling */
- sibptr = nilfs_btree_node_get_ptr(btree, parent,
- pindex + 1);
+ sibptr = nilfs_btree_node_get_ptr(parent, pindex + 1,
+ ncmax);
ret = nilfs_btree_get_block(btree, sibptr, &bh);
if (ret < 0)
goto err_out_curr_node;
sib = (struct nilfs_btree_node *)bh->b_data;
- if (nilfs_btree_node_get_nchildren(sib) >
- nilfs_btree_node_nchildren_min(sib, btree)) {
+ if (nilfs_btree_node_get_nchildren(sib) > ncmin) {
path[level].bp_sib_bh = bh;
path[level].bp_op = nilfs_btree_borrow_right;
stats->bs_nblocks++;
node = nilfs_btree_get_root(btree);
path[level].bp_oldreq.bpr_ptr =
- nilfs_btree_node_get_ptr(btree, node, path[level].bp_index);
+ nilfs_btree_node_get_ptr(node, path[level].bp_index,
+ NILFS_BTREE_ROOT_NCHILDREN_MAX);
- ret = nilfs_bmap_prepare_end_ptr(&btree->bt_bmap,
- &path[level].bp_oldreq, dat);
+ ret = nilfs_bmap_prepare_end_ptr(btree, &path[level].bp_oldreq, dat);
if (ret < 0)
goto err_out_child_node;
/* error */
err_out_curr_node:
- nilfs_bmap_abort_end_ptr(&btree->bt_bmap, &path[level].bp_oldreq, dat);
+ nilfs_bmap_abort_end_ptr(btree, &path[level].bp_oldreq, dat);
err_out_child_node:
for (level--; level >= NILFS_BTREE_LEVEL_NODE_MIN; level--) {
brelse(path[level].bp_sib_bh);
- nilfs_bmap_abort_end_ptr(&btree->bt_bmap,
- &path[level].bp_oldreq, dat);
+ nilfs_bmap_abort_end_ptr(btree, &path[level].bp_oldreq, dat);
}
*levelp = level;
stats->bs_nblocks = 0;
return ret;
}
-static void nilfs_btree_commit_delete(struct nilfs_btree *btree,
+static void nilfs_btree_commit_delete(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int maxlevel, struct inode *dat)
{
int level;
for (level = NILFS_BTREE_LEVEL_NODE_MIN; level <= maxlevel; level++) {
- nilfs_bmap_commit_end_ptr(&btree->bt_bmap,
- &path[level].bp_oldreq, dat);
+ nilfs_bmap_commit_end_ptr(btree, &path[level].bp_oldreq, dat);
path[level].bp_op(btree, path, level, NULL, NULL);
}
- if (!nilfs_bmap_dirty(&btree->bt_bmap))
- nilfs_bmap_set_dirty(&btree->bt_bmap);
+ if (!nilfs_bmap_dirty(btree))
+ nilfs_bmap_set_dirty(btree);
}
-static int nilfs_btree_delete(struct nilfs_bmap *bmap, __u64 key)
+static int nilfs_btree_delete(struct nilfs_bmap *btree, __u64 key)
{
- struct nilfs_btree *btree;
struct nilfs_btree_path *path;
struct nilfs_bmap_stats stats;
struct inode *dat;
int level, ret;
- btree = (struct nilfs_btree *)bmap;
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_BTREE_LEVEL_NODE_MIN, 0);
if (ret < 0)
goto out;
- dat = NILFS_BMAP_USE_VBN(&btree->bt_bmap) ?
- nilfs_bmap_get_dat(&btree->bt_bmap) : NULL;
+ dat = NILFS_BMAP_USE_VBN(btree) ? nilfs_bmap_get_dat(btree) : NULL;
ret = nilfs_btree_prepare_delete(btree, path, &level, &stats, dat);
if (ret < 0)
goto out;
nilfs_btree_commit_delete(btree, path, level, dat);
- nilfs_bmap_sub_blocks(bmap, stats.bs_nblocks);
+ nilfs_bmap_sub_blocks(btree, stats.bs_nblocks);
out:
- nilfs_btree_release_path(path);
nilfs_btree_free_path(path);
return ret;
}
-static int nilfs_btree_last_key(const struct nilfs_bmap *bmap, __u64 *keyp)
+static int nilfs_btree_last_key(const struct nilfs_bmap *btree, __u64 *keyp)
{
- struct nilfs_btree *btree;
struct nilfs_btree_path *path;
int ret;
- btree = (struct nilfs_btree *)bmap;
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;
}
-static int nilfs_btree_check_delete(struct nilfs_bmap *bmap, __u64 key)
+static int nilfs_btree_check_delete(struct nilfs_bmap *btree, __u64 key)
{
struct buffer_head *bh;
- struct nilfs_btree *btree;
struct nilfs_btree_node *root, *node;
__u64 maxkey, nextmaxkey;
__u64 ptr;
int nchildren, ret;
- btree = (struct nilfs_btree *)bmap;
root = nilfs_btree_get_root(btree);
switch (nilfs_btree_height(btree)) {
case 2:
nchildren = nilfs_btree_node_get_nchildren(root);
if (nchildren > 1)
return 0;
- ptr = nilfs_btree_node_get_ptr(btree, root, nchildren - 1);
+ ptr = nilfs_btree_node_get_ptr(root, nchildren - 1,
+ NILFS_BTREE_ROOT_NCHILDREN_MAX);
ret = nilfs_btree_get_block(btree, ptr, &bh);
if (ret < 0)
return ret;
return (maxkey == key) && (nextmaxkey < NILFS_BMAP_LARGE_LOW);
}
-static int nilfs_btree_gather_data(struct nilfs_bmap *bmap,
+static int nilfs_btree_gather_data(struct nilfs_bmap *btree,
__u64 *keys, __u64 *ptrs, int nitems)
{
struct buffer_head *bh;
- struct nilfs_btree *btree;
struct nilfs_btree_node *node, *root;
__le64 *dkeys;
__le64 *dptrs;
__u64 ptr;
- int nchildren, i, ret;
+ int nchildren, ncmax, i, ret;
- btree = (struct nilfs_btree *)bmap;
root = nilfs_btree_get_root(btree);
switch (nilfs_btree_height(btree)) {
case 2:
bh = NULL;
node = root;
+ ncmax = NILFS_BTREE_ROOT_NCHILDREN_MAX;
break;
case 3:
nchildren = nilfs_btree_node_get_nchildren(root);
WARN_ON(nchildren > 1);
- ptr = nilfs_btree_node_get_ptr(btree, root, nchildren - 1);
+ ptr = nilfs_btree_node_get_ptr(root, nchildren - 1,
+ NILFS_BTREE_ROOT_NCHILDREN_MAX);
ret = nilfs_btree_get_block(btree, ptr, &bh);
if (ret < 0)
return ret;
node = (struct nilfs_btree_node *)bh->b_data;
+ ncmax = nilfs_btree_nchildren_per_block(btree);
break;
default:
node = NULL;
if (nchildren < nitems)
nitems = nchildren;
dkeys = nilfs_btree_node_dkeys(node);
- dptrs = nilfs_btree_node_dptrs(node, btree);
+ dptrs = nilfs_btree_node_dptrs(node, ncmax);
for (i = 0; i < nitems; i++) {
- keys[i] = nilfs_bmap_dkey_to_key(dkeys[i]);
- ptrs[i] = nilfs_bmap_dptr_to_ptr(dptrs[i]);
+ keys[i] = le64_to_cpu(dkeys[i]);
+ ptrs[i] = le64_to_cpu(dptrs[i]);
}
if (bh != NULL)
}
static int
-nilfs_btree_prepare_convert_and_insert(struct nilfs_bmap *bmap, __u64 key,
+nilfs_btree_prepare_convert_and_insert(struct nilfs_bmap *btree, __u64 key,
union nilfs_bmap_ptr_req *dreq,
union nilfs_bmap_ptr_req *nreq,
struct buffer_head **bhp,
struct nilfs_bmap_stats *stats)
{
struct buffer_head *bh;
- struct nilfs_btree *btree = (struct nilfs_btree *)bmap;
struct inode *dat = NULL;
int ret;
/* for data */
/* cannot find near ptr */
- if (NILFS_BMAP_USE_VBN(bmap)) {
+ if (NILFS_BMAP_USE_VBN(btree)) {
dreq->bpr_ptr = nilfs_btree_find_target_v(btree, NULL, key);
- dat = nilfs_bmap_get_dat(bmap);
+ dat = nilfs_bmap_get_dat(btree);
}
- ret = nilfs_bmap_prepare_alloc_ptr(bmap, dreq, dat);
+ ret = nilfs_bmap_prepare_alloc_ptr(btree, dreq, dat);
if (ret < 0)
return ret;
stats->bs_nblocks++;
if (nreq != NULL) {
nreq->bpr_ptr = dreq->bpr_ptr + 1;
- ret = nilfs_bmap_prepare_alloc_ptr(bmap, nreq, dat);
+ ret = nilfs_bmap_prepare_alloc_ptr(btree, nreq, dat);
if (ret < 0)
goto err_out_dreq;
/* error */
err_out_nreq:
- nilfs_bmap_abort_alloc_ptr(bmap, nreq, dat);
+ nilfs_bmap_abort_alloc_ptr(btree, nreq, dat);
err_out_dreq:
- nilfs_bmap_abort_alloc_ptr(bmap, dreq, dat);
+ nilfs_bmap_abort_alloc_ptr(btree, dreq, dat);
stats->bs_nblocks = 0;
return ret;
}
static void
-nilfs_btree_commit_convert_and_insert(struct nilfs_bmap *bmap,
+nilfs_btree_commit_convert_and_insert(struct nilfs_bmap *btree,
__u64 key, __u64 ptr,
const __u64 *keys, const __u64 *ptrs,
int n,
union nilfs_bmap_ptr_req *nreq,
struct buffer_head *bh)
{
- struct nilfs_btree *btree = (struct nilfs_btree *)bmap;
struct nilfs_btree_node *node;
struct inode *dat;
__u64 tmpptr;
+ int ncblk;
/* free resources */
- if (bmap->b_ops->bop_clear != NULL)
- bmap->b_ops->bop_clear(bmap);
+ if (btree->b_ops->bop_clear != NULL)
+ btree->b_ops->bop_clear(btree);
/* ptr must be a pointer to a buffer head. */
set_buffer_nilfs_volatile((struct buffer_head *)((unsigned long)ptr));
/* convert and insert */
- dat = NILFS_BMAP_USE_VBN(bmap) ? nilfs_bmap_get_dat(bmap) : NULL;
- nilfs_btree_init(bmap);
+ dat = NILFS_BMAP_USE_VBN(btree) ? nilfs_bmap_get_dat(btree) : NULL;
+ nilfs_btree_init(btree);
if (nreq != NULL) {
- nilfs_bmap_commit_alloc_ptr(bmap, dreq, dat);
- nilfs_bmap_commit_alloc_ptr(bmap, nreq, dat);
+ nilfs_bmap_commit_alloc_ptr(btree, dreq, dat);
+ nilfs_bmap_commit_alloc_ptr(btree, nreq, dat);
/* create child node at level 1 */
- lock_buffer(bh);
node = (struct nilfs_btree_node *)bh->b_data;
- nilfs_btree_node_init(btree, node, 0, 1, n, keys, ptrs);
- nilfs_btree_node_insert(btree, node,
- key, dreq->bpr_ptr, n);
+ ncblk = nilfs_btree_nchildren_per_block(btree);
+ nilfs_btree_node_init(node, 0, 1, n, ncblk, keys, ptrs);
+ nilfs_btree_node_insert(node, n, key, dreq->bpr_ptr, ncblk);
if (!buffer_dirty(bh))
nilfs_btnode_mark_dirty(bh);
- if (!nilfs_bmap_dirty(bmap))
- nilfs_bmap_set_dirty(bmap);
+ if (!nilfs_bmap_dirty(btree))
+ nilfs_bmap_set_dirty(btree);
- unlock_buffer(bh);
brelse(bh);
/* create root node at level 2 */
node = nilfs_btree_get_root(btree);
tmpptr = nreq->bpr_ptr;
- nilfs_btree_node_init(btree, node, NILFS_BTREE_NODE_ROOT,
- 2, 1, &keys[0], &tmpptr);
+ nilfs_btree_node_init(node, NILFS_BTREE_NODE_ROOT, 2, 1,
+ NILFS_BTREE_ROOT_NCHILDREN_MAX,
+ &keys[0], &tmpptr);
} else {
- nilfs_bmap_commit_alloc_ptr(bmap, dreq, dat);
+ nilfs_bmap_commit_alloc_ptr(btree, dreq, dat);
/* create root node at level 1 */
node = nilfs_btree_get_root(btree);
- nilfs_btree_node_init(btree, node, NILFS_BTREE_NODE_ROOT,
- 1, n, keys, ptrs);
- nilfs_btree_node_insert(btree, node,
- key, dreq->bpr_ptr, n);
- if (!nilfs_bmap_dirty(bmap))
- nilfs_bmap_set_dirty(bmap);
+ nilfs_btree_node_init(node, NILFS_BTREE_NODE_ROOT, 1, n,
+ NILFS_BTREE_ROOT_NCHILDREN_MAX,
+ keys, ptrs);
+ nilfs_btree_node_insert(node, n, key, dreq->bpr_ptr,
+ NILFS_BTREE_ROOT_NCHILDREN_MAX);
+ if (!nilfs_bmap_dirty(btree))
+ nilfs_bmap_set_dirty(btree);
}
- if (NILFS_BMAP_USE_VBN(bmap))
- nilfs_btree_set_target_v(btree, key, dreq->bpr_ptr);
+ if (NILFS_BMAP_USE_VBN(btree))
+ nilfs_bmap_set_target_v(btree, key, dreq->bpr_ptr);
}
/**
* @ptrs:
* @n:
*/
-int nilfs_btree_convert_and_insert(struct nilfs_bmap *bmap,
+int nilfs_btree_convert_and_insert(struct nilfs_bmap *btree,
__u64 key, __u64 ptr,
const __u64 *keys, const __u64 *ptrs, int n)
{
di = &dreq;
ni = NULL;
} else if ((n + 1) <= NILFS_BTREE_NODE_NCHILDREN_MAX(
- 1 << bmap->b_inode->i_blkbits)) {
+ 1 << btree->b_inode->i_blkbits)) {
di = &dreq;
ni = &nreq;
} else {
BUG();
}
- ret = nilfs_btree_prepare_convert_and_insert(bmap, key, di, ni, &bh,
+ ret = nilfs_btree_prepare_convert_and_insert(btree, key, di, ni, &bh,
&stats);
if (ret < 0)
return ret;
- nilfs_btree_commit_convert_and_insert(bmap, key, ptr, keys, ptrs, n,
+ nilfs_btree_commit_convert_and_insert(btree, key, ptr, keys, ptrs, n,
di, ni, bh);
- nilfs_bmap_add_blocks(bmap, stats.bs_nblocks);
+ nilfs_bmap_add_blocks(btree, stats.bs_nblocks);
return 0;
}
-static int nilfs_btree_propagate_p(struct nilfs_btree *btree,
+static int nilfs_btree_propagate_p(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int level,
struct buffer_head *bh)
return 0;
}
-static int nilfs_btree_prepare_update_v(struct nilfs_btree *btree,
+static int nilfs_btree_prepare_update_v(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int level, struct inode *dat)
{
struct nilfs_btree_node *parent;
- int ret;
+ int ncmax, ret;
- parent = nilfs_btree_get_node(btree, path, level + 1);
+ parent = nilfs_btree_get_node(btree, path, level + 1, &ncmax);
path[level].bp_oldreq.bpr_ptr =
- nilfs_btree_node_get_ptr(btree, parent,
- path[level + 1].bp_index);
+ nilfs_btree_node_get_ptr(parent, path[level + 1].bp_index,
+ ncmax);
path[level].bp_newreq.bpr_ptr = path[level].bp_oldreq.bpr_ptr + 1;
ret = nilfs_dat_prepare_update(dat, &path[level].bp_oldreq.bpr_req,
&path[level].bp_newreq.bpr_req);
path[level].bp_ctxt.newkey = path[level].bp_newreq.bpr_ptr;
path[level].bp_ctxt.bh = path[level].bp_bh;
ret = nilfs_btnode_prepare_change_key(
- &NILFS_BMAP_I(&btree->bt_bmap)->i_btnode_cache,
+ &NILFS_BMAP_I(btree)->i_btnode_cache,
&path[level].bp_ctxt);
if (ret < 0) {
nilfs_dat_abort_update(dat,
return 0;
}
-static void nilfs_btree_commit_update_v(struct nilfs_btree *btree,
+static void nilfs_btree_commit_update_v(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int level, struct inode *dat)
{
struct nilfs_btree_node *parent;
+ int ncmax;
nilfs_dat_commit_update(dat, &path[level].bp_oldreq.bpr_req,
&path[level].bp_newreq.bpr_req,
- btree->bt_bmap.b_ptr_type == NILFS_BMAP_PTR_VS);
+ btree->b_ptr_type == NILFS_BMAP_PTR_VS);
if (buffer_nilfs_node(path[level].bp_bh)) {
nilfs_btnode_commit_change_key(
- &NILFS_BMAP_I(&btree->bt_bmap)->i_btnode_cache,
+ &NILFS_BMAP_I(btree)->i_btnode_cache,
&path[level].bp_ctxt);
path[level].bp_bh = path[level].bp_ctxt.bh;
}
set_buffer_nilfs_volatile(path[level].bp_bh);
- parent = nilfs_btree_get_node(btree, path, level + 1);
- nilfs_btree_node_set_ptr(btree, parent, path[level + 1].bp_index,
- path[level].bp_newreq.bpr_ptr);
+ parent = nilfs_btree_get_node(btree, path, level + 1, &ncmax);
+ nilfs_btree_node_set_ptr(parent, path[level + 1].bp_index,
+ path[level].bp_newreq.bpr_ptr, ncmax);
}
-static void nilfs_btree_abort_update_v(struct nilfs_btree *btree,
+static void nilfs_btree_abort_update_v(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int level, struct inode *dat)
{
&path[level].bp_newreq.bpr_req);
if (buffer_nilfs_node(path[level].bp_bh))
nilfs_btnode_abort_change_key(
- &NILFS_BMAP_I(&btree->bt_bmap)->i_btnode_cache,
+ &NILFS_BMAP_I(btree)->i_btnode_cache,
&path[level].bp_ctxt);
}
-static int nilfs_btree_prepare_propagate_v(struct nilfs_btree *btree,
+static int nilfs_btree_prepare_propagate_v(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int minlevel, int *maxlevelp,
struct inode *dat)
return ret;
}
-static void nilfs_btree_commit_propagate_v(struct nilfs_btree *btree,
+static void nilfs_btree_commit_propagate_v(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int minlevel, int maxlevel,
struct buffer_head *bh,
nilfs_btree_commit_update_v(btree, path, level, dat);
}
-static int nilfs_btree_propagate_v(struct nilfs_btree *btree,
+static int nilfs_btree_propagate_v(struct nilfs_bmap *btree,
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);
+ struct inode *dat = nilfs_bmap_get_dat(btree);
__u64 ptr;
+ int ncmax;
get_bh(bh);
path[level].bp_bh = bh;
goto out;
if (buffer_nilfs_volatile(path[level].bp_bh)) {
- parent = nilfs_btree_get_node(btree, path, level + 1);
- ptr = nilfs_btree_node_get_ptr(btree, parent,
- path[level + 1].bp_index);
+ parent = nilfs_btree_get_node(btree, path, level + 1, &ncmax);
+ ptr = nilfs_btree_node_get_ptr(parent,
+ path[level + 1].bp_index,
+ ncmax);
ret = nilfs_dat_mark_dirty(dat, ptr);
if (ret < 0)
goto out;
return ret;
}
-static int nilfs_btree_propagate(const struct nilfs_bmap *bmap,
+static int nilfs_btree_propagate(struct nilfs_bmap *btree,
struct buffer_head *bh)
{
- struct nilfs_btree *btree;
struct nilfs_btree_path *path;
struct nilfs_btree_node *node;
__u64 key;
WARN_ON(!buffer_dirty(bh));
- btree = (struct nilfs_btree *)bmap;
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;
key = nilfs_btree_node_get_key(node, 0);
level = nilfs_btree_node_get_level(node);
} else {
- key = nilfs_bmap_data_get_key(bmap, bh);
+ key = nilfs_bmap_data_get_key(btree, bh);
level = NILFS_BTREE_LEVEL_DATA;
}
- ret = nilfs_btree_do_lookup(btree, path, key, NULL, level + 1);
+ ret = nilfs_btree_do_lookup(btree, path, key, NULL, level + 1, 0);
if (ret < 0) {
if (unlikely(ret == -ENOENT))
printk(KERN_CRIT "%s: key = %llu, level == %d\n",
goto out;
}
- ret = NILFS_BMAP_USE_VBN(bmap) ?
+ ret = NILFS_BMAP_USE_VBN(btree) ?
nilfs_btree_propagate_v(btree, path, level, bh) :
nilfs_btree_propagate_p(btree, path, level, bh);
out:
- nilfs_btree_release_path(path);
nilfs_btree_free_path(path);
return ret;
}
-static int nilfs_btree_propagate_gc(const struct nilfs_bmap *bmap,
+static int nilfs_btree_propagate_gc(struct nilfs_bmap *btree,
struct buffer_head *bh)
{
- return nilfs_dat_mark_dirty(nilfs_bmap_get_dat(bmap), bh->b_blocknr);
+ return nilfs_dat_mark_dirty(nilfs_bmap_get_dat(btree), bh->b_blocknr);
}
-static void nilfs_btree_add_dirty_buffer(struct nilfs_btree *btree,
+static void nilfs_btree_add_dirty_buffer(struct nilfs_bmap *btree,
struct list_head *lists,
struct buffer_head *bh)
{
node = (struct nilfs_btree_node *)bh->b_data;
key = nilfs_btree_node_get_key(node, 0);
level = nilfs_btree_node_get_level(node);
+ if (level < NILFS_BTREE_LEVEL_NODE_MIN ||
+ level >= NILFS_BTREE_LEVEL_MAX) {
+ dump_stack();
+ printk(KERN_WARNING
+ "%s: invalid btree level: %d (key=%llu, ino=%lu, "
+ "blocknr=%llu)\n",
+ __func__, level, (unsigned long long)key,
+ NILFS_BMAP_I(btree)->vfs_inode.i_ino,
+ (unsigned long long)bh->b_blocknr);
+ return;
+ }
+
list_for_each(head, &lists[level]) {
cbh = list_entry(head, struct buffer_head, b_assoc_buffers);
cnode = (struct nilfs_btree_node *)cbh->b_data;
list_add_tail(&bh->b_assoc_buffers, head);
}
-static void nilfs_btree_lookup_dirty_buffers(struct nilfs_bmap *bmap,
+static void nilfs_btree_lookup_dirty_buffers(struct nilfs_bmap *btree,
struct list_head *listp)
{
- struct nilfs_btree *btree = (struct nilfs_btree *)bmap;
- struct address_space *btcache = &NILFS_BMAP_I(bmap)->i_btnode_cache;
+ struct address_space *btcache = &NILFS_BMAP_I(btree)->i_btnode_cache;
struct list_head lists[NILFS_BTREE_LEVEL_MAX];
struct pagevec pvec;
struct buffer_head *bh, *head;
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,
+static int nilfs_btree_assign_p(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int level,
struct buffer_head **bh,
struct nilfs_btree_node *parent;
__u64 key;
__u64 ptr;
- int ret;
+ int ncmax, ret;
- parent = nilfs_btree_get_node(btree, path, level + 1);
- ptr = nilfs_btree_node_get_ptr(btree, parent,
- path[level + 1].bp_index);
+ parent = nilfs_btree_get_node(btree, path, level + 1, &ncmax);
+ ptr = nilfs_btree_node_get_ptr(parent, path[level + 1].bp_index,
+ ncmax);
if (buffer_nilfs_node(*bh)) {
path[level].bp_ctxt.oldkey = ptr;
path[level].bp_ctxt.newkey = blocknr;
path[level].bp_ctxt.bh = *bh;
ret = nilfs_btnode_prepare_change_key(
- &NILFS_BMAP_I(&btree->bt_bmap)->i_btnode_cache,
+ &NILFS_BMAP_I(btree)->i_btnode_cache,
&path[level].bp_ctxt);
if (ret < 0)
return ret;
nilfs_btnode_commit_change_key(
- &NILFS_BMAP_I(&btree->bt_bmap)->i_btnode_cache,
+ &NILFS_BMAP_I(btree)->i_btnode_cache,
&path[level].bp_ctxt);
*bh = path[level].bp_ctxt.bh;
}
- nilfs_btree_node_set_ptr(btree, parent,
- path[level + 1].bp_index, blocknr);
+ nilfs_btree_node_set_ptr(parent, path[level + 1].bp_index, blocknr,
+ ncmax);
key = nilfs_btree_node_get_key(parent, path[level + 1].bp_index);
/* on-disk format */
- binfo->bi_dat.bi_blkoff = nilfs_bmap_key_to_dkey(key);
+ binfo->bi_dat.bi_blkoff = cpu_to_le64(key);
binfo->bi_dat.bi_level = level;
return 0;
}
-static int nilfs_btree_assign_v(struct nilfs_btree *btree,
+static int nilfs_btree_assign_v(struct nilfs_bmap *btree,
struct nilfs_btree_path *path,
int level,
struct buffer_head **bh,
union nilfs_binfo *binfo)
{
struct nilfs_btree_node *parent;
- struct inode *dat = nilfs_bmap_get_dat(&btree->bt_bmap);
+ struct inode *dat = nilfs_bmap_get_dat(btree);
__u64 key;
__u64 ptr;
union nilfs_bmap_ptr_req req;
- int ret;
+ int ncmax, ret;
- parent = nilfs_btree_get_node(btree, path, level + 1);
- ptr = nilfs_btree_node_get_ptr(btree, parent,
- path[level + 1].bp_index);
+ parent = nilfs_btree_get_node(btree, path, level + 1, &ncmax);
+ ptr = nilfs_btree_node_get_ptr(parent, path[level + 1].bp_index,
+ ncmax);
req.bpr_ptr = ptr;
ret = nilfs_dat_prepare_start(dat, &req.bpr_req);
if (ret < 0)
key = nilfs_btree_node_get_key(parent, path[level + 1].bp_index);
/* on-disk format */
- binfo->bi_v.bi_vblocknr = nilfs_bmap_ptr_to_dptr(ptr);
- binfo->bi_v.bi_blkoff = nilfs_bmap_key_to_dkey(key);
+ binfo->bi_v.bi_vblocknr = cpu_to_le64(ptr);
+ binfo->bi_v.bi_blkoff = cpu_to_le64(key);
return 0;
}
-static int nilfs_btree_assign(struct nilfs_bmap *bmap,
+static int nilfs_btree_assign(struct nilfs_bmap *btree,
struct buffer_head **bh,
sector_t blocknr,
union nilfs_binfo *binfo)
{
- struct nilfs_btree *btree;
struct nilfs_btree_path *path;
struct nilfs_btree_node *node;
__u64 key;
int level, ret;
- btree = (struct nilfs_btree *)bmap;
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;
key = nilfs_btree_node_get_key(node, 0);
level = nilfs_btree_node_get_level(node);
} else {
- key = nilfs_bmap_data_get_key(bmap, *bh);
+ key = nilfs_bmap_data_get_key(btree, *bh);
level = NILFS_BTREE_LEVEL_DATA;
}
- ret = nilfs_btree_do_lookup(btree, path, key, NULL, level + 1);
+ ret = nilfs_btree_do_lookup(btree, path, key, NULL, level + 1, 0);
if (ret < 0) {
WARN_ON(ret == -ENOENT);
goto out;
}
- ret = NILFS_BMAP_USE_VBN(bmap) ?
+ ret = NILFS_BMAP_USE_VBN(btree) ?
nilfs_btree_assign_v(btree, path, level, bh, blocknr, binfo) :
nilfs_btree_assign_p(btree, path, level, bh, blocknr, binfo);
out:
- nilfs_btree_release_path(path);
nilfs_btree_free_path(path);
return ret;
}
-static int nilfs_btree_assign_gc(struct nilfs_bmap *bmap,
+static int nilfs_btree_assign_gc(struct nilfs_bmap *btree,
struct buffer_head **bh,
sector_t blocknr,
union nilfs_binfo *binfo)
__u64 key;
int ret;
- ret = nilfs_dat_move(nilfs_bmap_get_dat(bmap), (*bh)->b_blocknr,
+ ret = nilfs_dat_move(nilfs_bmap_get_dat(btree), (*bh)->b_blocknr,
blocknr);
if (ret < 0)
return ret;
node = (struct nilfs_btree_node *)(*bh)->b_data;
key = nilfs_btree_node_get_key(node, 0);
} else
- key = nilfs_bmap_data_get_key(bmap, *bh);
+ key = nilfs_bmap_data_get_key(btree, *bh);
/* on-disk format */
binfo->bi_v.bi_vblocknr = cpu_to_le64((*bh)->b_blocknr);
- binfo->bi_v.bi_blkoff = nilfs_bmap_key_to_dkey(key);
+ binfo->bi_v.bi_blkoff = cpu_to_le64(key);
return 0;
}
-static int nilfs_btree_mark(struct nilfs_bmap *bmap, __u64 key, int level)
+static int nilfs_btree_mark(struct nilfs_bmap *btree, __u64 key, int level)
{
struct buffer_head *bh;
- struct nilfs_btree *btree;
struct nilfs_btree_path *path;
__u64 ptr;
int ret;
- btree = (struct nilfs_btree *)bmap;
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);
+ ret = nilfs_btree_do_lookup(btree, path, key, &ptr, level + 1, 0);
if (ret < 0) {
WARN_ON(ret == -ENOENT);
goto out;
if (!buffer_dirty(bh))
nilfs_btnode_mark_dirty(bh);
brelse(bh);
- if (!nilfs_bmap_dirty(&btree->bt_bmap))
- nilfs_bmap_set_dirty(&btree->bt_bmap);
+ if (!nilfs_bmap_dirty(btree))
+ nilfs_bmap_set_dirty(btree);
out:
- nilfs_btree_release_path(path);
nilfs_btree_free_path(path);
return ret;
}
int nilfs_btree_init(struct nilfs_bmap *bmap)
{
bmap->b_ops = &nilfs_btree_ops;
+ bmap->b_nchildren_per_block =
+ NILFS_BTREE_NODE_NCHILDREN_MAX(nilfs_btree_node_size(bmap));
return 0;
}
void nilfs_btree_init_gc(struct nilfs_bmap *bmap)
{
bmap->b_ops = &nilfs_btree_ops_gc;
+ bmap->b_nchildren_per_block =
+ NILFS_BTREE_NODE_NCHILDREN_MAX(nilfs_btree_node_size(bmap));
}
Code Review / linux-2.6.git / blobdiff