nilfs2: add norecovery mount option

[net-next-2.6.git] / fs / nilfs2 / the_nilfs.c

diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c
index 890a8d3886cf6ac1c3e7590b702dc9e7bfec33d2..6241e1722efc570f3bb62c81f30a4b4e8f7092e3 100644 (file)
--- a/fs/nilfs2/the_nilfs.c
+++ b/fs/nilfs2/the_nilfs.c
@@ -264,8 +264,14 @@ int load_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi)
        int valid_fs = nilfs_valid_fs(nilfs);
        int err;
 
-       if (nilfs_loaded(nilfs))
-               return 0;
+       if (nilfs_loaded(nilfs)) {
+               if (valid_fs ||
+                   ((s_flags & MS_RDONLY) && nilfs_test_opt(sbi, NORECOVERY)))
+                       return 0;
+               printk(KERN_ERR "NILFS: the filesystem is in an incomplete "
+                      "recovery state.\n");
+               return -EINVAL;
+       }
 
        if (!valid_fs) {
                printk(KERN_WARNING "NILFS warning: mounting unchecked fs\n");
@@ -295,6 +301,11 @@ int load_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi)
                goto skip_recovery;
 
        if (s_flags & MS_RDONLY) {
+               if (nilfs_test_opt(sbi, NORECOVERY)) {
+                       printk(KERN_INFO "NILFS: norecovery option specified. "
+                              "skipping roll-forward recovery\n");
+                       goto skip_recovery;
+               }
                if (really_read_only) {
                        printk(KERN_ERR "NILFS: write access "
                               "unavailable, cannot proceed.\n");
@@ -302,6 +313,11 @@ int load_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi)
                        goto failed_unload;
                }
                sbi->s_super->s_flags &= ~MS_RDONLY;
+       } else if (nilfs_test_opt(sbi, NORECOVERY)) {
+               printk(KERN_ERR "NILFS: recovery cancelled because norecovery "
+                      "option was specified for a read/write mount\n");
+               err = -EINVAL;
+               goto failed_unload;
        }
 
        err = nilfs_recover_logical_segments(nilfs, sbi, &ri);