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Message-Id: <1329721316-4955-6-git-send-email-tm@tao.ma>
Date: Mon, 20 Feb 2012 15:01:40 +0800
From: Tao Ma <tm@....ma>
To: linux-ext4@...r.kernel.org
Cc: linux-fsdevel@...r.kernel.org
Subject: [PATCH V4 06/22] ext4: Add journalled write support for inline data.
From: Tao Ma <boyu.mt@...bao.com>
Signed-off-by: Tao Ma <boyu.mt@...bao.com>
---
fs/ext4/inline.c | 24 ++++++++++++++++++++++
fs/ext4/inode.c | 59 +++++++++++++++++++++++++++++++++++++----------------
fs/ext4/xattr.h | 12 +++++++++++
3 files changed, 77 insertions(+), 18 deletions(-)
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index 4946a24..94359f0 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -736,6 +736,30 @@ out:
return copied;
}
+struct buffer_head *
+ext4_journalled_write_inline_data(struct inode *inode,
+ unsigned len,
+ struct page *page)
+{
+ int ret;
+ void *kaddr;
+ struct ext4_iloc iloc;
+
+ ret = ext4_get_inode_loc(inode, &iloc);
+ if (ret) {
+ ext4_std_error(inode->i_sb, ret);
+ return NULL;
+ }
+
+ down_write(&EXT4_I(inode)->xattr_sem);
+ kaddr = kmap_atomic(page, KM_USER0);
+ ext4_write_inline_data(inode, &iloc, kaddr, 0, len);
+ kunmap_atomic(kaddr, KM_USER0);
+ up_write(&EXT4_I(inode)->xattr_sem);
+
+ return iloc.bh;
+}
+
int ext4_destroy_inline_data(handle_t *handle, struct inode *inode)
{
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index bae79b4..e4bcae5 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1064,16 +1064,21 @@ static int ext4_journalled_write_end(struct file *file,
BUG_ON(!ext4_handle_valid(handle));
- if (copied < len) {
- if (!PageUptodate(page))
- copied = 0;
- page_zero_new_buffers(page, from+copied, to);
- }
+ if (ext4_has_inline_data(inode))
+ copied = ext4_write_inline_data_end(inode, pos, len,
+ copied, page);
+ else {
+ if (copied < len) {
+ if (!PageUptodate(page))
+ copied = 0;
+ page_zero_new_buffers(page, from+copied, to);
+ }
- ret = walk_page_buffers(handle, page_buffers(page), from,
- to, &partial, write_end_fn);
- if (!partial)
- SetPageUptodate(page);
+ ret = walk_page_buffers(handle, page_buffers(page), from,
+ to, &partial, write_end_fn);
+ if (!partial)
+ SetPageUptodate(page);
+ }
new_i_size = pos + copied;
if (new_i_size > inode->i_size)
i_size_write(inode, pos+copied);
@@ -1835,15 +1840,23 @@ static int __ext4_journalled_writepage(struct page *page,
{
struct address_space *mapping = page->mapping;
struct inode *inode = mapping->host;
- struct buffer_head *page_bufs;
+ struct buffer_head *page_bufs = NULL;
handle_t *handle = NULL;
int ret = 0;
int err;
+ struct buffer_head *inode_bh = NULL;
ClearPageChecked(page);
- page_bufs = page_buffers(page);
- BUG_ON(!page_bufs);
- walk_page_buffers(handle, page_bufs, 0, len, NULL, bget_one);
+
+ if (ext4_has_inline_data(inode)) {
+ BUG_ON(page->index != 0);
+ BUG_ON(len > ext4_get_max_inline_size(inode));
+ inode_bh = ext4_journalled_write_inline_data(inode, len, page);
+ } else {
+ page_bufs = page_buffers(page);
+ BUG_ON(!page_bufs);
+ walk_page_buffers(handle, page_bufs, 0, len, NULL, bget_one);
+ }
/* As soon as we unlock the page, it can go away, but we have
* references to buffers so we are safe */
unlock_page(page);
@@ -1856,11 +1869,19 @@ static int __ext4_journalled_writepage(struct page *page,
BUG_ON(!ext4_handle_valid(handle));
- ret = walk_page_buffers(handle, page_bufs, 0, len, NULL,
- do_journal_get_write_access);
+ if (ext4_has_inline_data(inode) && inode_bh) {
+ ret = ext4_journal_get_write_access(handle, inode_bh);
+
+ err = ext4_handle_dirty_metadata(handle, inode, inode_bh);
+
+ } else {
+ ret = walk_page_buffers(handle, page_bufs, 0, len, NULL,
+ do_journal_get_write_access);
+
+ err = walk_page_buffers(handle, page_bufs, 0, len, NULL,
+ write_end_fn);
+ }
- err = walk_page_buffers(handle, page_bufs, 0, len, NULL,
- write_end_fn);
if (ret == 0)
ret = err;
EXT4_I(inode)->i_datasync_tid = handle->h_transaction->t_tid;
@@ -1868,9 +1889,11 @@ static int __ext4_journalled_writepage(struct page *page,
if (!ret)
ret = err;
- walk_page_buffers(handle, page_bufs, 0, len, NULL, bput_one);
+ if (!ext4_has_inline_data(inode))
+ walk_page_buffers(handle, page_bufs, 0, len, NULL, bput_one);
ext4_set_inode_state(inode, EXT4_STATE_JDATA);
out:
+ brelse(inode_bh);
return ret;
}
diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h
index b9e5cec..9eb42c6 100644
--- a/fs/ext4/xattr.h
+++ b/fs/ext4/xattr.h
@@ -148,6 +148,10 @@ extern int ext4_write_inline_data_end(struct inode *inode,
loff_t pos, unsigned len,
unsigned copied,
struct page *page);
+extern struct buffer_head *
+ext4_journalled_write_inline_data(struct inode *inode,
+ unsigned len,
+ struct page *page);
# else /* CONFIG_EXT4_FS_XATTR */
static inline int
@@ -285,6 +289,14 @@ static inline int ext4_write_inline_data_end(struct inode *inode,
{
return 0;
}
+
+static inline struct buffer_head *
+ext4_journalled_write_inline_data(struct inode *inode,
+ unsigned len,
+ struct page *page)
+{
+ return NULL;
+}
# endif /* CONFIG_EXT4_FS_XATTR */
#ifdef CONFIG_EXT4_FS_SECURITY
--
1.7.0.4
--
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