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Date: Thu, 31 Jan 2013 13:17:56 +0800
From: Zheng Liu <gnehzuil.liu@...il.com>
To: linux-ext4@...r.kernel.org
Cc: Zheng Liu <wenqing.lz@...bao.com>, "Theodore Ts'o" <tytso@....edu>
Subject: [PATCH 8/9 v4] ext4: adjust some functions for reclaiming extents from extent status tree
From: Zheng Liu <wenqing.lz@...bao.com>
This commit changes some interfaces in extent status tree because we
need to use inode to count the cached objects in a extent status tree.
Signed-off-by: Zheng Liu <wenqing.lz@...bao.com>
Cc: "Theodore Ts'o" <tytso@....edu>
---
fs/ext4/extents_status.c | 49 +++++++++++++++++++++++-------------------------
1 file changed, 23 insertions(+), 26 deletions(-)
diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c
index e792d34..01fb000 100644
--- a/fs/ext4/extents_status.c
+++ b/fs/ext4/extents_status.c
@@ -142,9 +142,8 @@
static struct kmem_cache *ext4_es_cachep;
-static int __es_insert_extent(struct ext4_es_tree *tree,
- struct extent_status *newes);
-static int __es_remove_extent(struct ext4_es_tree *tree, ext4_lblk_t lblk,
+static int __es_insert_extent(struct inode *inode, struct extent_status *newes);
+static int __es_remove_extent(struct inode *inode, ext4_lblk_t lblk,
ext4_lblk_t end);
int __init ext4_init_es(void)
@@ -286,7 +285,7 @@ out:
}
static struct extent_status *
-ext4_es_alloc_extent(ext4_lblk_t lblk, ext4_lblk_t len,
+ext4_es_alloc_extent(struct inode *inode, ext4_lblk_t lblk, ext4_lblk_t len,
ext4_fsblk_t pblk, int status)
{
struct extent_status *es;
@@ -300,7 +299,7 @@ ext4_es_alloc_extent(ext4_lblk_t lblk, ext4_lblk_t len,
return es;
}
-static void ext4_es_free_extent(struct extent_status *es)
+static void ext4_es_free_extent(struct inode *inode, struct extent_status *es)
{
kmem_cache_free(ext4_es_cachep, es);
}
@@ -329,8 +328,9 @@ static int ext4_es_can_be_merged(struct extent_status *es1,
}
static struct extent_status *
-ext4_es_try_to_merge_left(struct ext4_es_tree *tree, struct extent_status *es)
+ext4_es_try_to_merge_left(struct inode *inode, struct extent_status *es)
{
+ struct ext4_es_tree *tree = &EXT4_I(inode)->i_es_tree;
struct extent_status *es1;
struct rb_node *node;
@@ -342,7 +342,7 @@ ext4_es_try_to_merge_left(struct ext4_es_tree *tree, struct extent_status *es)
if (ext4_es_can_be_merged(es1, es)) {
es1->es_len += es->es_len;
rb_erase(&es->rb_node, &tree->root);
- ext4_es_free_extent(es);
+ ext4_es_free_extent(inode, es);
es = es1;
}
@@ -350,8 +350,9 @@ ext4_es_try_to_merge_left(struct ext4_es_tree *tree, struct extent_status *es)
}
static struct extent_status *
-ext4_es_try_to_merge_right(struct ext4_es_tree *tree, struct extent_status *es)
+ext4_es_try_to_merge_right(struct inode *inode, struct extent_status *es)
{
+ struct ext4_es_tree *tree = &EXT4_I(inode)->i_es_tree;
struct extent_status *es1;
struct rb_node *node;
@@ -363,15 +364,15 @@ ext4_es_try_to_merge_right(struct ext4_es_tree *tree, struct extent_status *es)
if (ext4_es_can_be_merged(es, es1)) {
es->es_len += es1->es_len;
rb_erase(node, &tree->root);
- ext4_es_free_extent(es1);
+ ext4_es_free_extent(inode, es1);
}
return es;
}
-static int __es_insert_extent(struct ext4_es_tree *tree,
- struct extent_status *newes)
+static int __es_insert_extent(struct inode *inode, struct extent_status *newes)
{
+ struct ext4_es_tree *tree = &EXT4_I(inode)->i_es_tree;
struct rb_node **p = &tree->root.rb_node;
struct rb_node *parent = NULL;
struct extent_status *es;
@@ -386,14 +387,14 @@ static int __es_insert_extent(struct ext4_es_tree *tree,
es->es_len += newes->es_len;
es->es_pblk = ext4_es_get_pblock(es,
newes->es_pblk);
- es = ext4_es_try_to_merge_left(tree, es);
+ es = ext4_es_try_to_merge_left(inode, es);
goto out;
}
p = &(*p)->rb_left;
} else if (newes->es_lblk > ext4_es_end(es)) {
if (ext4_es_can_be_merged(es, newes)) {
es->es_len += newes->es_len;
- es = ext4_es_try_to_merge_right(tree, es);
+ es = ext4_es_try_to_merge_right(inode, es);
goto out;
}
p = &(*p)->rb_right;
@@ -403,7 +404,7 @@ static int __es_insert_extent(struct ext4_es_tree *tree,
}
}
- es = ext4_es_alloc_extent(newes->es_lblk, newes->es_len,
+ es = ext4_es_alloc_extent(inode, newes->es_lblk, newes->es_len,
newes->es_pblk, newes->es_status);
if (!es)
return -ENOMEM;
@@ -426,7 +427,6 @@ out:
int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t lblk,
ext4_lblk_t len, ext4_fsblk_t pblk, int status)
{
- struct ext4_es_tree *tree;
struct extent_status newes;
ext4_lblk_t end = lblk + len - 1;
int err = 0;
@@ -443,11 +443,10 @@ int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t lblk,
trace_ext4_es_insert_extent(inode, &newes);
write_lock(&EXT4_I(inode)->i_es_lock);
- tree = &EXT4_I(inode)->i_es_tree;
- err = __es_remove_extent(tree, lblk, end);
+ err = __es_remove_extent(inode, lblk, end);
if (err != 0)
goto error;
- err = __es_insert_extent(tree, &newes);
+ err = __es_insert_extent(inode, &newes);
error:
write_unlock(&EXT4_I(inode)->i_es_lock);
@@ -516,9 +515,10 @@ out:
return found;
}
-static int __es_remove_extent(struct ext4_es_tree *tree, ext4_lblk_t lblk,
- ext4_lblk_t end)
+static int __es_remove_extent(struct inode *inode, ext4_lblk_t lblk,
+ ext4_lblk_t end)
{
+ struct ext4_es_tree *tree = &EXT4_I(inode)->i_es_tree;
struct rb_node *node;
struct extent_status *es;
struct extent_status orig_es;
@@ -552,7 +552,7 @@ static int __es_remove_extent(struct ext4_es_tree *tree, ext4_lblk_t lblk,
newes.es_pblk = ext4_es_get_pblock(&orig_es,
orig_es.es_pblk + orig_es.es_len - len2);
newes.es_status = orig_es.es_status;
- err = __es_insert_extent(tree, &newes);
+ err = __es_insert_extent(inode, &newes);
if (err) {
es->es_lblk = orig_es.es_lblk;
es->es_len = orig_es.es_len;
@@ -578,7 +578,7 @@ static int __es_remove_extent(struct ext4_es_tree *tree, ext4_lblk_t lblk,
while (es && ext4_es_end(es) <= end) {
node = rb_next(&es->rb_node);
rb_erase(&es->rb_node, &tree->root);
- ext4_es_free_extent(es);
+ ext4_es_free_extent(inode, es);
if (!node) {
es = NULL;
break;
@@ -608,7 +608,6 @@ out:
int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t lblk,
ext4_lblk_t len)
{
- struct ext4_es_tree *tree;
ext4_lblk_t end;
int err = 0;
@@ -619,10 +618,8 @@ int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t lblk,
end = lblk + len - 1;
BUG_ON(end < lblk);
- tree = &EXT4_I(inode)->i_es_tree;
-
write_lock(&EXT4_I(inode)->i_es_lock);
- err = __es_remove_extent(tree, lblk, end);
+ err = __es_remove_extent(inode, lblk, end);
write_unlock(&EXT4_I(inode)->i_es_lock);
ext4_es_print_tree(inode);
return err;
--
1.7.12.rc2.18.g61b472e
--
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