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authorChao Yu <yuchao0@huawei.com>2017-03-23 13:38:26 +0800
committerJaegeuk Kim <jaegeuk@kernel.org>2017-03-24 15:10:53 -0400
commit22588f8773f687449ce6e97dce9f102553440d30 (patch)
tree4b3fe264daaf5151bf5d3b6dd509f155ff73a4a1
parent89e9eabd7ded4680f3b0f8ddc7398a3909de57c8 (diff)
f2fs: don't reserve additional space in xattr block
In this patch, we change xattr block disk layout as below: Before: xattr node block layout +---------------------------------------------+---------------+-------------+ | node block xattr entries | reserved | node footer | | 4068 Bytes | 4 Bytes | 24 Bytes | In memory layout +--------------------+---------------------------------+--------------------+ | inline xattr | node block xattr entries | reserved | | 200 Bytes | 4068 Bytes | 4 Bytes | After: xattr node block layout +-------------------------------------------------------------+-------------+ | node block xattr entries | node footer | | 4072 Bytes | 24 Bytes | In memory layout +--------------------+---------------------------------+--------------------+ | inline xattr | node block xattr entries | reserved | | 200 Bytes | 4072 Bytes | 4 Bytes | With this change, we don't need to reserve additional space in node block, just keep reserved space in logical in-memory layout. So that it would help to enlarge valid free space of xattr node block. As tested, generic/026 shows max stored xattr entires number increases from 531 to 532 when inline_xattr option is enabled. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
-rw-r--r--fs/f2fs/xattr.c6
-rw-r--r--fs/f2fs/xattr.h5
2 files changed, 5 insertions, 6 deletions
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
index 528aed399814..832c5110abab 100644
--- a/fs/f2fs/xattr.c
+++ b/fs/f2fs/xattr.c
@@ -256,7 +256,7 @@ static int lookup_all_xattrs(struct inode *inode, struct page *ipage,
if (!size && !inline_size)
return -ENODATA;
- txattr_addr = kzalloc(inline_size + size + RESERVED_XATTR_SIZE,
+ txattr_addr = kzalloc(inline_size + size + XATTR_PADDING_SIZE,
GFP_F2FS_ZERO);
if (!txattr_addr)
return -ENOMEM;
@@ -332,7 +332,7 @@ static int read_all_xattrs(struct inode *inode, struct page *ipage,
void *txattr_addr;
int err;
- txattr_addr = kzalloc(inline_size + size + RESERVED_XATTR_SIZE,
+ txattr_addr = kzalloc(inline_size + size + XATTR_PADDING_SIZE,
GFP_F2FS_ZERO);
if (!txattr_addr)
return -ENOMEM;
@@ -451,7 +451,7 @@ static inline int write_all_xattrs(struct inode *inode, __u32 hsize,
}
xattr_addr = page_address(xpage);
- memcpy(xattr_addr, txattr_addr + inline_size, MAX_XATTR_BLOCK_SIZE);
+ memcpy(xattr_addr, txattr_addr + inline_size, VALID_XATTR_BLOCK_SIZE);
set_page_dirty(xpage);
f2fs_put_page(xpage, 1);
diff --git a/fs/f2fs/xattr.h b/fs/f2fs/xattr.h
index 1e7db8d0806e..6afcee35ebeb 100644
--- a/fs/f2fs/xattr.h
+++ b/fs/f2fs/xattr.h
@@ -72,9 +72,8 @@ struct f2fs_xattr_entry {
for (entry = XATTR_FIRST_ENTRY(addr);\
!IS_XATTR_LAST_ENTRY(entry);\
entry = XATTR_NEXT_ENTRY(entry))
-#define MAX_XATTR_BLOCK_SIZE (PAGE_SIZE - sizeof(struct node_footer))
-#define RESERVED_XATTR_SIZE (sizeof(__u32))
-#define VALID_XATTR_BLOCK_SIZE (MAX_XATTR_BLOCK_SIZE - RESERVED_XATTR_SIZE)
+#define VALID_XATTR_BLOCK_SIZE (PAGE_SIZE - sizeof(struct node_footer))
+#define XATTR_PADDING_SIZE (sizeof(__u32))
#define MIN_OFFSET(i) XATTR_ALIGN(inline_xattr_size(i) + \
VALID_XATTR_BLOCK_SIZE)