nilfs2: add helper to get if volume is in a valid state

This adds a helper function, nilfs_valid_fs() which returns if nilfs
is in a valid state or not.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c
index aea2b58..890a8d3 100644 (file)
--- a/fs/nilfs2/the_nilfs.c
+++ b/fs/nilfs2/the_nilfs.c
@@ -261,16 +261,12 @@ int load_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi)
        struct nilfs_recovery_info ri;
        unsigned int s_flags = sbi->s_super->s_flags;
        int really_read_only = bdev_read_only(nilfs->ns_bdev);
-       unsigned valid_fs;
+       int valid_fs = nilfs_valid_fs(nilfs);
        int err;
 
        if (nilfs_loaded(nilfs))
                return 0;
 
-       down_write(&nilfs->ns_sem);
-       valid_fs = (nilfs->ns_mount_state & NILFS_VALID_FS);
-       up_write(&nilfs->ns_sem);
-
        if (!valid_fs) {
                printk(KERN_WARNING "NILFS warning: mounting unchecked fs\n");
                if (s_flags & MS_RDONLY) {

diff --git a/fs/nilfs2/the_nilfs.h b/fs/nilfs2/the_nilfs.h
index 20abd55..589786e 100644 (file)
--- a/fs/nilfs2/the_nilfs.h
+++ b/fs/nilfs2/the_nilfs.h
@@ -258,6 +258,16 @@ static inline void nilfs_put_sbinfo(struct nilfs_sb_info *sbi)
                kfree(sbi);
 }
 
+static inline int nilfs_valid_fs(struct the_nilfs *nilfs)
+{
+       unsigned valid_fs;
+
+       down_read(&nilfs->ns_sem);
+       valid_fs = (nilfs->ns_mount_state & NILFS_VALID_FS);
+       up_read(&nilfs->ns_sem);
+       return valid_fs;
+}
+
 static inline void
 nilfs_get_segment_range(struct the_nilfs *nilfs, __u64 segnum,
                        sector_t *seg_start, sector_t *seg_end)