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| author | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2010-08-14 14:44:51 +0200 |
|---|---|---|
| committer | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2010-10-23 02:24:35 +0200 |
| commit | fd52202930b7e8db48bee5a6fc6b1f438e822a23 (patch) | |
| tree | 1ecb7ce60634b5575dd463417447555ef9f1576a /fs | |
| parent | nilfs2: move inode count and block count into root object (diff) | |
| download | linux-fd52202930b7e8db48bee5a6fc6b1f438e822a23.tar.xz linux-fd52202930b7e8db48bee5a6fc6b1f438e822a23.zip | |
nilfs2: use checkpoint tree for mount check of snapshots
This rewrites nilfs_checkpoint_is_mounted() function so that it
decides whether a checkpoint is mounted by whether the corresponding
root object is found in checkpoint tree.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/nilfs2/the_nilfs.c | 28 |
1 files changed, 11 insertions, 17 deletions
diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c index f1d599273d9e..89c78562d0e9 100644 --- a/fs/nilfs2/the_nilfs.c +++ b/fs/nilfs2/the_nilfs.c @@ -954,26 +954,20 @@ struct nilfs_sb_info *nilfs_find_sbinfo(struct the_nilfs *nilfs, int nilfs_checkpoint_is_mounted(struct the_nilfs *nilfs, __u64 cno, int snapshot_mount) { - struct nilfs_sb_info *sbi; - int ret = 0; + struct nilfs_root *root; + int ret; - down_read(&nilfs->ns_super_sem); - if (cno == 0 || cno > nilfs->ns_cno) - goto out_unlock; + if (cno < 0 || cno > nilfs->ns_cno) + return false; - list_for_each_entry(sbi, &nilfs->ns_supers, s_list) { - if (sbi->s_snapshot_cno == cno && - (!snapshot_mount || nilfs_test_opt(sbi, SNAPSHOT))) { - /* exclude read-only mounts */ - ret++; - break; - } - } - /* for protecting recent checkpoints */ if (cno >= nilfs_last_cno(nilfs)) - ret++; + return true; /* protect recent checkpoints */ - out_unlock: - up_read(&nilfs->ns_super_sem); + ret = false; + root = nilfs_lookup_root(nilfs, cno); + if (root) { + ret = true; + nilfs_put_root(root); + } return ret; } |