Merge to Fedora kernel-2.6.18-1.2224_FC5 patched with stable patch-2.6.18.1-vs2.0...

[linux-2.6.git] / fs / ntfs / inode.c

diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c
index 4c86b7e..6d44cea 100644 (file)
--- a/fs/ntfs/inode.c
+++ b/fs/ntfs/inode.c
@@ -367,6 +367,12 @@ static void ntfs_destroy_extent_inode(ntfs_inode *ni)
        kmem_cache_free(ntfs_inode_cache, ni);
 }
 
+/*
+ * The attribute runlist lock has separate locking rules from the
+ * normal runlist lock, so split the two lock-classes:
+ */
+static struct lock_class_key attr_list_rl_lock_class;
+
 /**
  * __ntfs_init_inode - initialize ntfs specific part of an inode
  * @sb:                super block of mounted volume
@@ -394,6 +400,8 @@ void __ntfs_init_inode(struct super_block *sb, ntfs_inode *ni)
        ni->attr_list_size = 0;
        ni->attr_list = NULL;
        ntfs_init_runlist(&ni->attr_list_rl);
+       lockdep_set_class(&ni->attr_list_rl.lock,
+                               &attr_list_rl_lock_class);
        ni->itype.index.bmp_ino = NULL;
        ni->itype.index.block_size = 0;
        ni->itype.index.vcn_size = 0;
@@ -405,6 +413,13 @@ void __ntfs_init_inode(struct super_block *sb, ntfs_inode *ni)
        ni->ext.base_ntfs_ino = NULL;
 }
 
+/*
+ * Extent inodes get MFT-mapped in a nested way, while the base inode
+ * is still mapped. Teach this nesting to the lock validator by creating
+ * a separate class for nested inode's mrec_lock's:
+ */
+static struct lock_class_key extent_inode_mrec_lock_key;
+
 inline ntfs_inode *ntfs_new_extent_inode(struct super_block *sb,
                unsigned long mft_no)
 {
@@ -413,6 +428,7 @@ inline ntfs_inode *ntfs_new_extent_inode(struct super_block *sb,
        ntfs_debug("Entering.");
        if (likely(ni != NULL)) {
                __ntfs_init_inode(sb, ni);
+               lockdep_set_class(&ni->mrec_lock, &extent_inode_mrec_lock_key);
                ni->mft_no = mft_no;
                ni->type = AT_UNUSED;
                ni->name = NULL;
@@ -540,8 +556,6 @@ static int ntfs_read_locked_inode(struct inode *vi)
 
        /* Setup the generic vfs inode parts now. */
 
-       /* This is the optimal IO size (for stat), not the fs block size. */
-       vi->i_blksize = PAGE_CACHE_SIZE;
        /*
         * This is for checking whether an inode has changed w.r.t. a file so
         * that the file can be updated if necessary (compare with f_version).
@@ -1218,7 +1232,6 @@ static int ntfs_read_locked_attr_inode(struct inode *base_vi, struct inode *vi)
        base_ni = NTFS_I(base_vi);
 
        /* Just mirror the values from the base inode. */
-       vi->i_blksize   = base_vi->i_blksize;
        vi->i_version   = base_vi->i_version;
        vi->i_uid       = base_vi->i_uid;
        vi->i_gid       = base_vi->i_gid;
@@ -1488,7 +1501,6 @@ static int ntfs_read_locked_index_inode(struct inode *base_vi, struct inode *vi)
        ni      = NTFS_I(vi);
        base_ni = NTFS_I(base_vi);
        /* Just mirror the values from the base inode. */
-       vi->i_blksize   = base_vi->i_blksize;
        vi->i_version   = base_vi->i_version;
        vi->i_uid       = base_vi->i_uid;
        vi->i_gid       = base_vi->i_gid;
@@ -1722,6 +1734,15 @@ err_out:
        return err;
 }
 
+/*
+ * The MFT inode has special locking, so teach the lock validator
+ * about this by splitting off the locking rules of the MFT from
+ * the locking rules of other inodes. The MFT inode can never be
+ * accessed from the VFS side (or even internally), only by the
+ * map_mft functions.
+ */
+static struct lock_class_key mft_ni_runlist_lock_key, mft_ni_mrec_lock_key;
+
 /**
  * ntfs_read_inode_mount - special read_inode for mount time use only
  * @vi:                inode to read
@@ -2148,6 +2169,14 @@ int ntfs_read_inode_mount(struct inode *vi)
        ntfs_attr_put_search_ctx(ctx);
        ntfs_debug("Done.");
        ntfs_free(m);
+
+       /*
+        * Split the locking rules of the MFT inode from the
+        * locking rules of other inodes:
+        */
+       lockdep_set_class(&ni->runlist.lock, &mft_ni_runlist_lock_key);
+       lockdep_set_class(&ni->mrec_lock, &mft_ni_mrec_lock_key);
+
        return 0;
 
 em_put_err_out: