NFS: Maintain a common server record for NFS2/3 as well as for NFS4

[linux.git] / fs / ntfs / super.c

diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index 0e14acea3f8b831d13dabc6256e10b82d0fe622f..74e0ee8fce721ec8326a090b62a4ad79cb5d0156 100644 (file)
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -1724,6 +1724,14 @@ upcase_failed:
        return FALSE;
 }
 
+/*
+ * The lcn and mft bitmap inodes are NTFS-internal inodes with
+ * their own special locking rules:
+ */
+static struct lock_class_key
+       lcnbmp_runlist_lock_key, lcnbmp_mrec_lock_key,
+       mftbmp_runlist_lock_key, mftbmp_mrec_lock_key;
+
 /**
  * load_system_files - open the system files using normal functions
  * @vol:       ntfs super block describing device whose system files to load
@@ -1780,6 +1788,10 @@ static BOOL load_system_files(ntfs_volume *vol)
                ntfs_error(sb, "Failed to load $MFT/$BITMAP attribute.");
                goto iput_mirr_err_out;
        }
+       lockdep_set_class(&NTFS_I(vol->mftbmp_ino)->runlist.lock,
+                          &mftbmp_runlist_lock_key);
+       lockdep_set_class(&NTFS_I(vol->mftbmp_ino)->mrec_lock,
+                          &mftbmp_mrec_lock_key);
        /* Read upcase table and setup @vol->upcase and @vol->upcase_len. */
        if (!load_and_init_upcase(vol))
                goto iput_mftbmp_err_out;
@@ -1802,6 +1814,11 @@ static BOOL load_system_files(ntfs_volume *vol)
                        iput(vol->lcnbmp_ino);
                goto bitmap_failed;
        }
+       lockdep_set_class(&NTFS_I(vol->lcnbmp_ino)->runlist.lock,
+                          &lcnbmp_runlist_lock_key);
+       lockdep_set_class(&NTFS_I(vol->lcnbmp_ino)->mrec_lock,
+                          &lcnbmp_mrec_lock_key);
+
        NInoSetSparseDisabled(NTFS_I(vol->lcnbmp_ino));
        if ((vol->nr_clusters + 7) >> 3 > i_size_read(vol->lcnbmp_ino)) {
                iput(vol->lcnbmp_ino);
@@ -2743,6 +2760,17 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
        struct inode *tmp_ino;
        int blocksize, result;
 
+       /*
+        * We do a pretty difficult piece of bootstrap by reading the
+        * MFT (and other metadata) from disk into memory. We'll only
+        * release this metadata during umount, so the locking patterns
+        * observed during bootstrap do not count. So turn off the
+        * observation of locking patterns (strictly for this context
+        * only) while mounting NTFS. [The validator is still active
+        * otherwise, even for this context: it will for example record
+        * lock class registrations.]
+        */
+       lockdep_off();
        ntfs_debug("Entering.");
 #ifndef NTFS_RW
        sb->s_flags |= MS_RDONLY;
@@ -2754,6 +2782,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
                if (!silent)
                        ntfs_error(sb, "Allocation of NTFS volume structure "
                                        "failed. Aborting mount...");
+               lockdep_on();
                return -ENOMEM;
        }
        /* Initialize ntfs_volume structure. */
@@ -2940,6 +2969,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
                mutex_unlock(&ntfs_lock);
                sb->s_export_op = &ntfs_export_ops;
                lock_kernel();
+               lockdep_on();
                return 0;
        }
        ntfs_error(sb, "Failed to allocate root directory.");
@@ -3059,6 +3089,7 @@ err_out_now:
        sb->s_fs_info = NULL;
        kfree(vol);
        ntfs_debug("Failed, returning -EINVAL.");
+       lockdep_on();
        return -EINVAL;
 }