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Add generation number to btrfs_header, readdir fixes, hash collision fixes

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2007-03-23 15:56:19 -04:00
committed by David Woodhouse
parent df2ce34c88
commit 7f5c15160e
5 changed files with 32 additions and 14 deletions
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8
fs/btrfs/ctree.c
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@@ -1,6 +1,7 @@
#include <linux/module.h>
#include "ctree.h"
#include "disk-io.h"
#include "transaction.h"
static int split_node(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_path *path, int level);
@@ -39,7 +40,8 @@ static int btrfs_cow_block(struct btrfs_trans_handle *trans, struct btrfs_root
struct buffer_head *cow;
struct btrfs_node *cow_node;
if (buffer_dirty(buf)) {
if (btrfs_header_generation(btrfs_buffer_header(buf)) ==
trans->transid) {
*cow_ret = buf;
return 0;
}
@@ -47,6 +49,7 @@ static int btrfs_cow_block(struct btrfs_trans_handle *trans, struct btrfs_root
cow_node = btrfs_buffer_node(cow);
memcpy(cow_node, btrfs_buffer_node(buf), root->blocksize);
btrfs_set_header_blocknr(&cow_node->header, cow->b_blocknr);
btrfs_set_header_generation(&cow_node->header, trans->transid);
*cow_ret = cow;
mark_buffer_dirty(cow);
btrfs_inc_ref(trans, root, buf);
@@ -661,6 +664,7 @@ static int insert_new_root(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_set_header_nritems(&c->header, 1);
btrfs_set_header_level(&c->header, level);
btrfs_set_header_blocknr(&c->header, t->b_blocknr);
btrfs_set_header_generation(&c->header, trans->transid);
btrfs_set_header_parentid(&c->header,
btrfs_header_parentid(btrfs_buffer_header(root->node)));
lower = btrfs_buffer_node(path->nodes[level-1]);
@@ -750,6 +754,7 @@ static int split_node(struct btrfs_trans_handle *trans, struct btrfs_root
split = btrfs_buffer_node(split_buffer);
btrfs_set_header_flags(&split->header, btrfs_header_flags(&c->header));
btrfs_set_header_blocknr(&split->header, split_buffer->b_blocknr);
btrfs_set_header_generation(&split->header, trans->transid);
btrfs_set_header_parentid(&split->header,
btrfs_header_parentid(btrfs_buffer_header(root->node)));
mid = (c_nritems + 1) / 2;
@@ -1096,6 +1101,7 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root
}
btrfs_set_header_nritems(&right->header, nritems - mid);
btrfs_set_header_blocknr(&right->header, right_buffer->b_blocknr);
btrfs_set_header_generation(&right->header, trans->transid);
btrfs_set_header_level(&right->header, 0);
btrfs_set_header_parentid(&right->header,
btrfs_header_parentid(btrfs_buffer_header(root->node)));