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Date: Mon, 12 Jan 2015 15:12:13 +0800
From: Chao Yu <chao2.yu@...sung.com>
To: Jaegeuk Kim <jaegeuk@...nel.org>,
Changman Lee <cm224.lee@...sung.com>
Cc: linux-f2fs-devel@...ts.sourceforge.net,
linux-kernel@...r.kernel.org
Subject: [f2fs-dev][RFC PATCH 04/10] f2fs: introduce universal lookup/update
interface for extent cache
In this patch, we do these jobs:
1. rename {check,update}_extent_cache to f2fs_{lookup,update}_extent_info;
2. introduce universal lookup/update interface of extent cache:
f2fs_{lookup,update}_extent_cache including above two real functions, then
export them to function callers.
So after above cleanup, we can add new rb-tree based extent cache into exported
interfaces.
Signed-off-by: Chao Yu <chao2.yu@...sung.com>
---
fs/f2fs/data.c | 66 +++++++++++++++++++++++++++++++++---------------------
fs/f2fs/f2fs.h | 2 +-
fs/f2fs/file.c | 2 +-
fs/f2fs/inline.c | 2 +-
fs/f2fs/recovery.c | 2 +-
5 files changed, 44 insertions(+), 30 deletions(-)
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 5a3e489..4f5b871e 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -270,20 +270,20 @@ static void f2fs_map_bh(struct inode *inode, pgoff_t pgofs,
bh_result->b_size = UINT_MAX;
}
-static int check_extent_cache(struct inode *inode, pgoff_t pgofs,
- struct extent_info *ei)
+static bool f2fs_lookup_extent_info(struct inode *inode, pgoff_t pgofs,
+ struct extent_info *ei)
{
struct f2fs_inode_info *fi = F2FS_I(inode);
pgoff_t start_fofs, end_fofs;
block_t start_blkaddr;
if (is_inode_flag_set(fi, FI_NO_EXTENT))
- return 0;
+ return false;
read_lock(&fi->ext_lock);
if (fi->ext.len == 0) {
read_unlock(&fi->ext_lock);
- return 0;
+ return false;
}
stat_inc_total_hit(inode->i_sb);
@@ -296,29 +296,22 @@ static int check_extent_cache(struct inode *inode, pgoff_t pgofs,
*ei = fi->ext;
stat_inc_read_hit(inode->i_sb);
read_unlock(&fi->ext_lock);
- return 1;
+ return true;
}
read_unlock(&fi->ext_lock);
- return 0;
+ return false;
}
-void update_extent_cache(struct dnode_of_data *dn)
+static bool f2fs_update_extent_info(struct inode *inode, pgoff_t fofs,
+ block_t blkaddr)
{
- struct f2fs_inode_info *fi = F2FS_I(dn->inode);
- pgoff_t fofs, start_fofs, end_fofs;
+ struct f2fs_inode_info *fi = F2FS_I(inode);
+ pgoff_t start_fofs, end_fofs;
block_t start_blkaddr, end_blkaddr;
int need_update = true;
- f2fs_bug_on(F2FS_I_SB(dn->inode), dn->data_blkaddr == NEW_ADDR);
-
- /* Update the page address in the parent node */
- __set_data_blkaddr(dn);
-
if (is_inode_flag_set(fi, FI_NO_EXTENT))
- return;
-
- fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) +
- dn->ofs_in_node;
+ return false;
write_lock(&fi->ext_lock);
@@ -333,16 +326,16 @@ void update_extent_cache(struct dnode_of_data *dn)
/* Initial extent */
if (fi->ext.len == 0) {
- if (dn->data_blkaddr != NULL_ADDR) {
+ if (blkaddr != NULL_ADDR) {
fi->ext.fofs = fofs;
- fi->ext.blk = dn->data_blkaddr;
+ fi->ext.blk = blkaddr;
fi->ext.len = 1;
}
goto end_update;
}
/* Front merge */
- if (fofs == start_fofs - 1 && dn->data_blkaddr == start_blkaddr - 1) {
+ if (fofs == start_fofs - 1 && blkaddr == start_blkaddr - 1) {
fi->ext.fofs--;
fi->ext.blk--;
fi->ext.len++;
@@ -350,7 +343,7 @@ void update_extent_cache(struct dnode_of_data *dn)
}
/* Back merge */
- if (fofs == end_fofs + 1 && dn->data_blkaddr == end_blkaddr + 1) {
+ if (fofs == end_fofs + 1 && blkaddr == end_blkaddr + 1) {
fi->ext.len++;
goto end_update;
}
@@ -377,9 +370,30 @@ void update_extent_cache(struct dnode_of_data *dn)
}
end_update:
write_unlock(&fi->ext_lock);
- if (need_update)
+ return need_update;
+}
+
+static bool f2fs_lookup_extent_cache(struct inode *inode, pgoff_t pgofs,
+ struct extent_info *ei)
+{
+ return f2fs_lookup_extent_info(inode, pgofs, ei);
+}
+
+void f2fs_update_extent_cache(struct dnode_of_data *dn)
+{
+ struct f2fs_inode_info *fi = F2FS_I(dn->inode);
+ pgoff_t fofs;
+
+ f2fs_bug_on(F2FS_I_SB(dn->inode), dn->data_blkaddr == NEW_ADDR);
+
+ /* Update the page address in the parent node */
+ __set_data_blkaddr(dn);
+
+ fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) +
+ dn->ofs_in_node;
+
+ if (f2fs_update_extent_info(dn->inode, fofs, dn->data_blkaddr))
sync_inode_page(dn);
- return;
}
struct page *find_data_page(struct inode *inode, pgoff_t index, bool sync)
@@ -625,7 +639,7 @@ static int __get_data_block(struct inode *inode, sector_t iblock,
/* Get the page offset from the block offset(iblock) */
pgofs = (pgoff_t)(iblock >> (PAGE_CACHE_SHIFT - blkbits));
- if (check_extent_cache(inode, pgofs, &ei)) {
+ if (f2fs_lookup_extent_cache(inode, pgofs, &ei)) {
f2fs_map_bh(inode, pgofs, &ei, bh_result);
goto out;
}
@@ -792,7 +806,7 @@ int do_write_data_page(struct page *page, struct f2fs_io_info *fio)
set_inode_flag(F2FS_I(inode), FI_UPDATE_WRITE);
} else {
write_data_page(page, &dn, fio);
- update_extent_cache(&dn);
+ f2fs_update_extent_cache(&dn);
set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE);
}
out_writepage:
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index a74ad85..eb9ffae 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1475,7 +1475,7 @@ void f2fs_submit_page_mbio(struct f2fs_sb_info *, struct page *,
struct f2fs_io_info *);
int reserve_new_block(struct dnode_of_data *);
int f2fs_reserve_block(struct dnode_of_data *, pgoff_t);
-void update_extent_cache(struct dnode_of_data *);
+void f2fs_update_extent_cache(struct dnode_of_data *);
struct page *find_data_page(struct inode *, pgoff_t, bool);
struct page *get_lock_data_page(struct inode *, pgoff_t);
struct page *get_new_data_page(struct inode *, struct page *, pgoff_t, bool);
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 5df3367..0dcd9fb 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -430,7 +430,7 @@ int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
continue;
dn->data_blkaddr = NULL_ADDR;
- update_extent_cache(dn);
+ f2fs_update_extent_cache(dn);
invalidate_blocks(sbi, blkaddr);
nr_free++;
}
diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
index fa2aa2f..9f6c745 100644
--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -116,7 +116,7 @@ no_update:
set_page_writeback(page);
fio.blk_addr = dn->data_blkaddr;
write_data_page(page, dn, &fio);
- update_extent_cache(dn);
+ f2fs_update_extent_cache(dn);
f2fs_wait_on_page_writeback(page, DATA);
if (dirty)
inode_dec_dirty_pages(dn->inode);
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index c4211a5..a7adbdb 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -397,7 +397,7 @@ static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,
/* write dummy data page */
recover_data_page(sbi, NULL, &sum, src, dest);
dn.data_blkaddr = dest;
- update_extent_cache(&dn);
+ f2fs_update_extent_cache(&dn);
recovered++;
}
dn.ofs_in_node++;
--
2.2.1
--
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