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Date: Thu, 29 Sep 2011 13:08:45 +0800
From: Yongqiang Yang <xiaoqiangnk@...il.com>
To: linux-ext4@...r.kernel.org
Cc: jack@...e.cz, jeff.liu@...cle.com, achender@...ux.vnet.ibm.com,
adityakali@...gle.com, Yongqiang Yang <xiaoqiangnk@...il.com>
Subject: [RFC PATCH V2 5/6] ext4: let ext4 maintian delayed extent trees
This patch let ext4 maintain delayed extent trees.
Signed-off-by: Yongqiang Yang <xiaoqiangnk@...il.com>
---
fs/ext4/ext4.h | 1 +
fs/ext4/extents.c | 2 ++
fs/ext4/indirect.c | 3 +++
fs/ext4/inode.c | 28 ++++++++++++++++++++++++++--
fs/ext4/super.c | 12 +++++++++++-
5 files changed, 43 insertions(+), 3 deletions(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index d3c6b97..177ec0a 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -519,6 +519,7 @@ struct ext4_new_group_data {
#define EXT4_GET_BLOCKS_PUNCH_OUT_EXT 0x0020
/* Don't normalize allocation size (used for fallocate) */
#define EXT4_GET_BLOCKS_NO_NORMALIZE 0x0040
+#define EXT4_GET_BLOCKS_DEALLOC 0x0080
/*
* Flags used by ext4_free_blocks
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 9124cd2..bdbb984 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -3688,6 +3688,8 @@ void ext4_ext_truncate(struct inode *inode)
last_block = (inode->i_size + sb->s_blocksize - 1)
>> EXT4_BLOCK_SIZE_BITS(sb);
+ err = ext4_de_remove_space(inode, last_block,
+ EXT_MAX_BLOCKS - last_block);
err = ext4_ext_remove_space(inode, last_block);
/* In a multi-transaction truncate, we only make the final
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index 0962642..25cdb5b 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -22,6 +22,7 @@
#include <linux/module.h>
#include "ext4_jbd2.h"
+#include "ext4_extents.h"
#include "truncate.h"
#include <trace/events/ext4.h>
@@ -1383,6 +1384,8 @@ void ext4_ind_truncate(struct inode *inode)
down_write(&ei->i_data_sem);
ext4_discard_preallocations(inode);
+ ext4_de_remove_space(inode, last_block,
+ EXT_MAX_BLOCKS - last_block);
/*
* The orphan list entry will now protect us from any crash which
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index f86b149..0f9f108 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -442,7 +442,15 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
up_read((&EXT4_I(inode)->i_data_sem));
if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) {
- int ret = check_block_validity(inode, map);
+ int ret;
+ if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) {
+ /* delayed alloc may be allocated by fallocate,
+ * we need to handle delayed extent here.
+ */
+ down_write((&EXT4_I(inode)->i_data_sem));
+ goto delayed_mapped;
+ }
+ ret = check_block_validity(inode, map);
if (ret != 0)
return ret;
}
@@ -517,8 +525,18 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
(flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE))
ext4_da_update_reserve_space(inode, retval, 1);
}
- if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE)
+ if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) {
ext4_clear_inode_state(inode, EXT4_STATE_DELALLOC_RESERVED);
+delayed_mapped:
+ if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) {
+ int ret;
+ /* delayed allocation blocks has been allocated */
+ ret = ext4_de_remove_space(inode, map->m_lblk,
+ map->m_len);
+ if (ret < 0)
+ retval = ret;
+ }
+ }
up_write((&EXT4_I(inode)->i_data_sem));
if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) {
@@ -1630,6 +1648,12 @@ static int ext4_da_get_block_prep(struct inode *inode, sector_t iblock,
/* not enough space to reserve */
return ret;
+ down_write((&EXT4_I(inode)->i_data_sem));
+ ret = ext4_de_add_space(inode, map.m_lblk, map.m_len);
+ up_write((&EXT4_I(inode)->i_data_sem));
+ if (ret)
+ return ret;
+
map_bh(bh, inode->i_sb, invalid_block);
set_buffer_new(bh);
set_buffer_delay(bh);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 247fcdd..a248551 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -49,6 +49,7 @@
#include "xattr.h"
#include "acl.h"
#include "mballoc.h"
+#include "ext4_extents.h"
#define CREATE_TRACE_POINTS
#include <trace/events/ext4.h>
@@ -967,6 +968,7 @@ void ext4_clear_inode(struct inode *inode)
end_writeback(inode);
dquot_drop(inode);
ext4_discard_preallocations(inode);
+ ext4_de_remove_space(inode, 0, EXT_MAX_BLOCKS);
if (EXT4_I(inode)->jinode) {
jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode),
EXT4_I(inode)->jinode);
@@ -4976,9 +4978,14 @@ static int __init ext4_init_fs(void)
init_waitqueue_head(&ext4__ioend_wq[i]);
}
- err = ext4_init_pageio();
+ err = ext4_init_de();
if (err)
return err;
+
+ err = ext4_init_pageio();
+ if (err)
+ goto out8;
+
err = ext4_init_system_zone();
if (err)
goto out7;
@@ -5030,6 +5037,9 @@ out6:
ext4_exit_system_zone();
out7:
ext4_exit_pageio();
+out8:
+ ext4_exit_de();
+
return err;
}
--
1.7.5.1
--
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