f2fs: avoid redundant time update for parent directory in f2fs_delete_entry

[firefly-linux-kernel-4.4.55.git] / fs / f2fs / file.c

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index f9e085dfb1f088fbc3e94c7ea7fead9e9093cf9e..819de7f39f265a2700bc10c4321cc0d2aa3feed4 100644 (file)
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -137,6 +137,9 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
        if (ret)
                return ret;
 
+       /* guarantee free sections for fsync */
+       f2fs_balance_fs(sbi);
+
        mutex_lock(&inode->i_mutex);
 
        if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
@@ -160,15 +163,17 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
        if (need_to_sync_dir(sbi, inode))
                need_cp = true;
 
-       f2fs_write_inode(inode, NULL);
-
        if (need_cp) {
                /* all the dirty node pages should be flushed for POR */
                ret = f2fs_sync_fs(inode->i_sb, 1);
                clear_inode_flag(F2FS_I(inode), FI_NEED_CP);
        } else {
-               while (sync_node_pages(sbi, inode->i_ino, &wbc) == 0)
-                       f2fs_write_inode(inode, NULL);
+               /* if there is no written node page, write its inode page */
+               while (!sync_node_pages(sbi, inode->i_ino, &wbc)) {
+                       ret = f2fs_write_inode(inode, NULL);
+                       if (ret)
+                               goto out;
+               }
                filemap_fdatawait_range(sbi->node_inode->i_mapping,
                                                        0, LONG_MAX);
        }
@@ -405,6 +410,8 @@ int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
                struct dnode_of_data dn;
                struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
 
+               f2fs_balance_fs(sbi);
+
                mutex_lock_op(sbi, DATA_TRUNC);
                set_new_dnode(&dn, inode, NULL, NULL, 0);
                err = get_dnode_of_data(&dn, index, RDONLY_NODE);
@@ -532,7 +539,6 @@ static long f2fs_fallocate(struct file *file, int mode,
                                loff_t offset, loff_t len)
 {
        struct inode *inode = file->f_path.dentry->d_inode;
-       struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
        long ret;
 
        if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
@@ -543,7 +549,10 @@ static long f2fs_fallocate(struct file *file, int mode,
        else
                ret = expand_inode_data(inode, offset, len, mode);
 
-       f2fs_balance_fs(sbi);
+       if (!ret) {
+               inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+               mark_inode_dirty(inode);
+       }
        return ret;
 }