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authorChangman Lee <cm224.lee@samsung.com>2014-12-08 15:29:41 +0900
committerJaegeuk Kim <jaegeuk@kernel.org>2014-12-08 10:40:22 -0800
commit51455b19384d26afac4f214fab2ad0a4f1964e30 (patch)
tree170d57186dbd2f4461eb3f50a18a280345c13c34 /fs/f2fs/file.c
parent9c7bb702122fdf7c391f7d02c7d27a61a2c0c4b7 (diff)
downloadop-kernel-dev-51455b19384d26afac4f214fab2ad0a4f1964e30.zip
op-kernel-dev-51455b19384d26afac4f214fab2ad0a4f1964e30.tar.gz
f2fs: cleanup path to need cp at fsync
Added some commentaries for code readability and cleaned up if-statement clearly. Signed-off-by: Changman Lee <cm224.lee@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/file.c')
-rw-r--r--fs/f2fs/file.c79
1 files changed, 43 insertions, 36 deletions
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 0b97002..3c27e0e 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -149,6 +149,26 @@ static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino)
return ret;
}
+static void try_to_fix_pino(struct inode *inode)
+{
+ struct f2fs_inode_info *fi = F2FS_I(inode);
+ nid_t pino;
+
+ down_write(&fi->i_sem);
+ fi->xattr_ver = 0;
+ if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
+ get_parent_ino(inode, &pino)) {
+ fi->i_pino = pino;
+ file_got_pino(inode);
+ up_write(&fi->i_sem);
+
+ mark_inode_dirty_sync(inode);
+ f2fs_write_inode(inode, NULL);
+ } else {
+ up_write(&fi->i_sem);
+ }
+}
+
int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
{
struct inode *inode = file->f_mapping->host;
@@ -213,49 +233,36 @@ go_write:
up_read(&fi->i_sem);
if (need_cp) {
- nid_t pino;
-
/* all the dirty node pages should be flushed for POR */
ret = f2fs_sync_fs(inode->i_sb, 1);
- down_write(&fi->i_sem);
- fi->xattr_ver = 0;
- if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
- get_parent_ino(inode, &pino)) {
- fi->i_pino = pino;
- file_got_pino(inode);
- up_write(&fi->i_sem);
- mark_inode_dirty_sync(inode);
- ret = f2fs_write_inode(inode, NULL);
- if (ret)
- goto out;
- } else {
- up_write(&fi->i_sem);
- }
- } else {
+ /*
+ * We've secured consistency through sync_fs. Following pino
+ * will be used only for fsynced inodes after checkpoint.
+ */
+ try_to_fix_pino(inode);
+ goto out;
+ }
sync_nodes:
- sync_node_pages(sbi, ino, &wbc);
-
- if (need_inode_block_update(sbi, ino)) {
- mark_inode_dirty_sync(inode);
- ret = f2fs_write_inode(inode, NULL);
- if (ret)
- goto out;
- goto sync_nodes;
- }
+ sync_node_pages(sbi, ino, &wbc);
- ret = wait_on_node_pages_writeback(sbi, ino);
- if (ret)
- goto out;
+ if (need_inode_block_update(sbi, ino)) {
+ mark_inode_dirty_sync(inode);
+ f2fs_write_inode(inode, NULL);
+ goto sync_nodes;
+ }
- /* once recovery info is written, don't need to tack this */
- remove_dirty_inode(sbi, ino, APPEND_INO);
- clear_inode_flag(fi, FI_APPEND_WRITE);
+ ret = wait_on_node_pages_writeback(sbi, ino);
+ if (ret)
+ goto out;
+
+ /* once recovery info is written, don't need to tack this */
+ remove_dirty_inode(sbi, ino, APPEND_INO);
+ clear_inode_flag(fi, FI_APPEND_WRITE);
flush_out:
- remove_dirty_inode(sbi, ino, UPDATE_INO);
- clear_inode_flag(fi, FI_UPDATE_WRITE);
- ret = f2fs_issue_flush(sbi);
- }
+ remove_dirty_inode(sbi, ino, UPDATE_INO);
+ clear_inode_flag(fi, FI_UPDATE_WRITE);
+ ret = f2fs_issue_flush(sbi);
out:
trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
return ret;
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