Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 2148 insertions, 0 deletions

diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
new file mode 100644
index 000000000000..bcdf2438d152
--- /dev/null
+++ b/fs/reiserfs/super.c
@@ -0,0 +1,2148 @@
+/*
+ * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
+ *
+ * Trivial changes by Alan Cox to add the LFS fixes
+ *
+ * Trivial Changes:
+ * Rights granted to Hans Reiser to redistribute under other terms providing
+ * he accepts all liability including but not limited to patent, fitness
+ * for purpose, and direct or indirect claims arising from failure to perform.
+ *
+ * NO WARRANTY
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/vmalloc.h>
+#include <linux/time.h>
+#include <asm/uaccess.h>
+#include <linux/reiserfs_fs.h>
+#include <linux/reiserfs_acl.h>
+#include <linux/reiserfs_xattr.h>
+#include <linux/smp_lock.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/buffer_head.h>
+#include <linux/vfs.h>
+#include <linux/namespace.h>
+#include <linux/mount.h>
+#include <linux/namei.h>
+#include <linux/quotaops.h>
+
+struct file_system_type reiserfs_fs_type;
+
+static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
+static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
+static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
+
+int is_reiserfs_3_5 (struct reiserfs_super_block * rs)
+{
+  return !strncmp (rs->s_v1.s_magic, reiserfs_3_5_magic_string,
+		   strlen (reiserfs_3_5_magic_string));
+}
+
+
+int is_reiserfs_3_6 (struct reiserfs_super_block * rs)
+{
+  return !strncmp (rs->s_v1.s_magic, reiserfs_3_6_magic_string,
+ 		   strlen (reiserfs_3_6_magic_string));
+}
+
+
+int is_reiserfs_jr (struct reiserfs_super_block * rs)
+{
+  return !strncmp (rs->s_v1.s_magic, reiserfs_jr_magic_string,
+ 		   strlen (reiserfs_jr_magic_string));
+}
+
+
+static int is_any_reiserfs_magic_string (struct reiserfs_super_block * rs)
+{
+  return (is_reiserfs_3_5 (rs) || is_reiserfs_3_6 (rs) ||
+	  is_reiserfs_jr (rs));
+}
+
+static int reiserfs_remount (struct super_block * s, int * flags, char * data);
+static int reiserfs_statfs (struct super_block * s, struct kstatfs * buf);
+
+static int reiserfs_sync_fs (struct super_block * s, int wait)
+{
+    if (!(s->s_flags & MS_RDONLY)) {
+        struct reiserfs_transaction_handle th;
+	reiserfs_write_lock(s);
+	if (!journal_begin(&th, s, 1))
+            if (!journal_end_sync(&th, s, 1))
+                reiserfs_flush_old_commits(s);
+	s->s_dirt = 0; /* Even if it's not true.
+                        * We'll loop forever in sync_supers otherwise */
+	reiserfs_write_unlock(s);
+    } else {
+        s->s_dirt = 0;
+    }
+    return 0;
+}
+
+static void reiserfs_write_super(struct super_block *s)
+{
+    reiserfs_sync_fs(s, 1);
+}
+
+static void reiserfs_write_super_lockfs (struct super_block * s)
+{
+  struct reiserfs_transaction_handle th ;
+  reiserfs_write_lock(s);
+  if (!(s->s_flags & MS_RDONLY)) {
+    int err = journal_begin(&th, s, 1) ;
+    if (err) {
+        reiserfs_block_writes(&th) ;
+    } else {
+        reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
+        journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
+        reiserfs_block_writes(&th) ;
+        journal_end_sync(&th, s, 1) ;
+    }
+  }
+  s->s_dirt = 0;
+  reiserfs_write_unlock(s);
+}
+
+static void reiserfs_unlockfs(struct super_block *s) {
+  reiserfs_allow_writes(s) ;
+}
+
+extern const struct reiserfs_key  MAX_KEY;
+
+
+/* this is used to delete "save link" when there are no items of a
+   file it points to. It can either happen if unlink is completed but
+   "save unlink" removal, or if file has both unlink and truncate
+   pending and as unlink completes first (because key of "save link"
+   protecting unlink is bigger that a key lf "save link" which
+   protects truncate), so there left no items to make truncate
+   completion on */
+static int remove_save_link_only (struct super_block * s, struct reiserfs_key * key, int oid_free)
+{
+    struct reiserfs_transaction_handle th;
+    int err;
+
+     /* we are going to do one balancing */
+     err = journal_begin (&th, s, JOURNAL_PER_BALANCE_CNT);
+     if (err)
+        return err;
+ 
+     reiserfs_delete_solid_item (&th, NULL, key);
+     if (oid_free)
+        /* removals are protected by direct items */
+        reiserfs_release_objectid (&th, le32_to_cpu (key->k_objectid));
+
+     return journal_end (&th, s, JOURNAL_PER_BALANCE_CNT);
+}
+ 
+#ifdef CONFIG_QUOTA
+static int reiserfs_quota_on_mount(struct super_block *, int);
+#endif
+ 
+/* look for uncompleted unlinks and truncates and complete them */
+static int finish_unfinished (struct super_block * s)
+{
+    INITIALIZE_PATH (path);
+    struct cpu_key max_cpu_key, obj_key;
+    struct reiserfs_key save_link_key;
+    int retval = 0;
+    struct item_head * ih;
+    struct buffer_head * bh;
+    int item_pos;
+    char * item;
+    int done;
+    struct inode * inode;
+    int truncate;
+#ifdef CONFIG_QUOTA
+    int i;
+    int ms_active_set;
+#endif
+ 
+ 
+    /* compose key to look for "save" links */
+    max_cpu_key.version = KEY_FORMAT_3_5;
+    max_cpu_key.on_disk_key = MAX_KEY;
+    max_cpu_key.key_length = 3;
+
+#ifdef CONFIG_QUOTA
+    /* Needed for iput() to work correctly and not trash data */
+    if (s->s_flags & MS_ACTIVE) {
+	    ms_active_set = 0;
+    } else {
+	    ms_active_set = 1;
+	    s->s_flags |= MS_ACTIVE;
+    }
+    /* Turn on quotas so that they are updated correctly */
+    for (i = 0; i < MAXQUOTAS; i++) {
+	if (REISERFS_SB(s)->s_qf_names[i]) {
+	    int ret = reiserfs_quota_on_mount(s, i);
+	    if (ret < 0)
+		reiserfs_warning(s, "reiserfs: cannot turn on journalled quota: error %d", ret);
+	}
+    }
+#endif
+ 
+    done = 0;
+    REISERFS_SB(s)->s_is_unlinked_ok = 1;
+    while (!retval) {
+        retval = search_item (s, &max_cpu_key, &path);
+        if (retval != ITEM_NOT_FOUND) {
+            reiserfs_warning (s, "vs-2140: finish_unfinished: search_by_key returned %d",
+                              retval);
+            break;
+        }
+        
+        bh = get_last_bh (&path);
+        item_pos = get_item_pos (&path);
+        if (item_pos != B_NR_ITEMS (bh)) {
+            reiserfs_warning (s, "vs-2060: finish_unfinished: wrong position found");
+            break;
+        }
+        item_pos --;
+        ih = B_N_PITEM_HEAD (bh, item_pos);
+ 
+        if (le32_to_cpu (ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
+            /* there are no "save" links anymore */
+            break;
+ 
+        save_link_key = ih->ih_key;
+        if (is_indirect_le_ih (ih))
+            truncate = 1;
+        else
+            truncate = 0;
+ 
+        /* reiserfs_iget needs k_dirid and k_objectid only */
+        item = B_I_PITEM (bh, ih);
+        obj_key.on_disk_key.k_dir_id = le32_to_cpu (*(__u32 *)item);
+        obj_key.on_disk_key.k_objectid = le32_to_cpu (ih->ih_key.k_objectid);
+	obj_key.on_disk_key.u.k_offset_v1.k_offset = 0;
+	obj_key.on_disk_key.u.k_offset_v1.k_uniqueness = 0;
+	
+        pathrelse (&path);
+ 
+        inode = reiserfs_iget (s, &obj_key);
+        if (!inode) {
+            /* the unlink almost completed, it just did not manage to remove
+	       "save" link and release objectid */
+            reiserfs_warning (s, "vs-2180: finish_unfinished: iget failed for %K",
+                              &obj_key);
+            retval = remove_save_link_only (s, &save_link_key, 1);
+            continue;
+        }
+
+	if (!truncate && inode->i_nlink) {
+	    /* file is not unlinked */
+            reiserfs_warning (s, "vs-2185: finish_unfinished: file %K is not unlinked",
+                              &obj_key);
+            retval = remove_save_link_only (s, &save_link_key, 0);
+            continue;
+	}
+	DQUOT_INIT(inode);
+
+	if (truncate && S_ISDIR (inode->i_mode) ) {
+	    /* We got a truncate request for a dir which is impossible.
+	       The only imaginable way is to execute unfinished truncate request
+	       then boot into old kernel, remove the file and create dir with
+	       the same key. */
+	    reiserfs_warning(s, "green-2101: impossible truncate on a directory %k. Please report", INODE_PKEY (inode));
+	    retval = remove_save_link_only (s, &save_link_key, 0);
+	    truncate = 0;
+	    iput (inode); 
+	    continue;
+	}
+ 
+        if (truncate) {
+            REISERFS_I(inode) -> i_flags |= i_link_saved_truncate_mask;
+            /* not completed truncate found. New size was committed together
+	       with "save" link */
+            reiserfs_info (s, "Truncating %k to %Ld ..",
+                              INODE_PKEY (inode), inode->i_size);
+            reiserfs_truncate_file (inode, 0/*don't update modification time*/);
+            retval = remove_save_link (inode, truncate);
+        } else {
+            REISERFS_I(inode) -> i_flags |= i_link_saved_unlink_mask;
+            /* not completed unlink (rmdir) found */
+            reiserfs_info (s, "Removing %k..", INODE_PKEY (inode));
+            /* removal gets completed in iput */
+            retval = 0;
+        }
+ 
+        iput (inode);
+        printk ("done\n");
+        done ++;
+    }
+    REISERFS_SB(s)->s_is_unlinked_ok = 0;
+     
+#ifdef CONFIG_QUOTA
+    /* Turn quotas off */
+    for (i = 0; i < MAXQUOTAS; i++) {
+            if (sb_dqopt(s)->files[i])
+                    vfs_quota_off_mount(s, i);
+    }
+    if (ms_active_set)
+	    /* Restore the flag back */
+	    s->s_flags &= ~MS_ACTIVE;
+#endif
+    pathrelse (&path);
+    if (done)
+        reiserfs_info (s, "There were %d uncompleted unlinks/truncates. "
+                          "Completed\n", done);
+    return retval;
+}
+ 
+/* to protect file being unlinked from getting lost we "safe" link files
+   being unlinked. This link will be deleted in the same transaction with last
+   item of file. mounting the filesytem we scan all these links and remove
+   files which almost got lost */
+void add_save_link (struct reiserfs_transaction_handle * th,
+		    struct inode * inode, int truncate)
+{
+    INITIALIZE_PATH (path);
+    int retval;
+    struct cpu_key key;
+    struct item_head ih;
+    __u32 link;
+
+    BUG_ON (!th->t_trans_id);
+
+    /* file can only get one "save link" of each kind */
+    RFALSE( truncate && 
+	    ( REISERFS_I(inode) -> i_flags & i_link_saved_truncate_mask ),
+	    "saved link already exists for truncated inode %lx",
+	    ( long ) inode -> i_ino );
+    RFALSE( !truncate && 
+	    ( REISERFS_I(inode) -> i_flags & i_link_saved_unlink_mask ),
+	    "saved link already exists for unlinked inode %lx",
+	    ( long ) inode -> i_ino );
+
+    /* setup key of "save" link */
+    key.version = KEY_FORMAT_3_5;
+    key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
+    key.on_disk_key.k_objectid = inode->i_ino;
+    if (!truncate) {
+	/* unlink, rmdir, rename */
+	set_cpu_key_k_offset (&key, 1 + inode->i_sb->s_blocksize);
+	set_cpu_key_k_type (&key, TYPE_DIRECT);
+
+	/* item head of "safe" link */
+	make_le_item_head (&ih, &key, key.version, 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
+			   4/*length*/, 0xffff/*free space*/);
+    } else {
+	/* truncate */
+	if (S_ISDIR (inode->i_mode))
+	    reiserfs_warning(inode->i_sb, "green-2102: Adding a truncate savelink for a directory %k! Please report", INODE_PKEY(inode));
+	set_cpu_key_k_offset (&key, 1);
+	set_cpu_key_k_type (&key, TYPE_INDIRECT);
+
+	/* item head of "safe" link */
+	make_le_item_head (&ih, &key, key.version, 1, TYPE_INDIRECT,
+			   4/*length*/, 0/*free space*/);
+    }
+    key.key_length = 3;
+
+    /* look for its place in the tree */
+    retval = search_item (inode->i_sb, &key, &path);
+    if (retval != ITEM_NOT_FOUND) {
+	if ( retval != -ENOSPC )
+	    reiserfs_warning (inode->i_sb, "vs-2100: add_save_link:"
+			  "search_by_key (%K) returned %d", &key, retval);
+	pathrelse (&path);
+	return;
+    }
+
+    /* body of "save" link */
+    link = INODE_PKEY (inode)->k_dir_id;
+
+    /* put "save" link inot tree, don't charge quota to anyone */
+    retval = reiserfs_insert_item (th, &path, &key, &ih, NULL, (char *)&link);
+    if (retval) {
+	if (retval != -ENOSPC)
+	    reiserfs_warning (inode->i_sb, "vs-2120: add_save_link: insert_item returned %d",
+			  retval);
+    } else {
+	if( truncate )
+	    REISERFS_I(inode) -> i_flags |= i_link_saved_truncate_mask;
+	else
+	    REISERFS_I(inode) -> i_flags |= i_link_saved_unlink_mask;
+    }
+}
+
+
+/* this opens transaction unlike add_save_link */
+int remove_save_link (struct inode * inode, int truncate)
+{
+    struct reiserfs_transaction_handle th;
+    struct reiserfs_key key;
+    int err;
+ 
+    /* we are going to do one balancing only */
+    err = journal_begin (&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
+    if (err)
+        return err;
+ 
+    /* setup key of "save" link */
+    key.k_dir_id = cpu_to_le32 (MAX_KEY_OBJECTID);
+    key.k_objectid = INODE_PKEY (inode)->k_objectid;
+    if (!truncate) {
+        /* unlink, rmdir, rename */
+        set_le_key_k_offset (KEY_FORMAT_3_5, &key,
+			     1 + inode->i_sb->s_blocksize);
+        set_le_key_k_type (KEY_FORMAT_3_5, &key, TYPE_DIRECT);
+    } else {
+        /* truncate */
+        set_le_key_k_offset (KEY_FORMAT_3_5, &key, 1);
+        set_le_key_k_type (KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
+    }
+ 
+    if( ( truncate && 
+          ( REISERFS_I(inode) -> i_flags & i_link_saved_truncate_mask ) ) ||
+        ( !truncate && 
+          ( REISERFS_I(inode) -> i_flags & i_link_saved_unlink_mask ) ) )
+	/* don't take quota bytes from anywhere */
+	reiserfs_delete_solid_item (&th, NULL, &key);
+    if (!truncate) {
+	reiserfs_release_objectid (&th, inode->i_ino);
+	REISERFS_I(inode) -> i_flags &= ~i_link_saved_unlink_mask;
+    } else
+	REISERFS_I(inode) -> i_flags &= ~i_link_saved_truncate_mask;
+ 
+    return journal_end (&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
+}
+
+
+static void reiserfs_put_super (struct super_block * s)
+{
+  int i;
+  struct reiserfs_transaction_handle th ;
+  th.t_trans_id = 0;
+
+  if (REISERFS_SB(s)->xattr_root) {
+    d_invalidate (REISERFS_SB(s)->xattr_root);
+    dput (REISERFS_SB(s)->xattr_root);
+  }
+  
+  if (REISERFS_SB(s)->priv_root) {
+    d_invalidate (REISERFS_SB(s)->priv_root);
+    dput (REISERFS_SB(s)->priv_root);
+  }
+
+  /* change file system state to current state if it was mounted with read-write permissions */
+  if (!(s->s_flags & MS_RDONLY)) {
+    if (!journal_begin(&th, s, 10)) {
+        reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ;
+        set_sb_umount_state( SB_DISK_SUPER_BLOCK(s), REISERFS_SB(s)->s_mount_state );
+        journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
+    }
+  }
+
+  /* note, journal_release checks for readonly mount, and can decide not
+  ** to do a journal_end
+  */
+  journal_release(&th, s) ;
+
+  for (i = 0; i < SB_BMAP_NR (s); i ++)
+    brelse (SB_AP_BITMAP (s)[i].bh);
+
+  vfree (SB_AP_BITMAP (s));
+
+  brelse (SB_BUFFER_WITH_SB (s));
+
+  print_statistics (s);
+
+  if (REISERFS_SB(s)->s_kmallocs != 0) {
+    reiserfs_warning (s, "vs-2004: reiserfs_put_super: allocated memory left %d",
+		      REISERFS_SB(s)->s_kmallocs);
+  }
+
+  if (REISERFS_SB(s)->reserved_blocks != 0) {
+    reiserfs_warning (s, "green-2005: reiserfs_put_super: reserved blocks left %d",
+		      REISERFS_SB(s)->reserved_blocks);
+  }
+
+  reiserfs_proc_info_done( s );
+
+  kfree(s->s_fs_info);
+  s->s_fs_info = NULL;
+
+  return;
+}
+
+static kmem_cache_t * reiserfs_inode_cachep;
+
+static struct inode *reiserfs_alloc_inode(struct super_block *sb)
+{
+	struct reiserfs_inode_info *ei;
+	ei = (struct reiserfs_inode_info *)kmem_cache_alloc(reiserfs_inode_cachep, SLAB_KERNEL);
+	if (!ei)
+		return NULL;
+	return &ei->vfs_inode;
+}
+
+static void reiserfs_destroy_inode(struct inode *inode)
+{
+	kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
+}
+
+static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
+{
+	struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *) foo;
+
+	if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
+	    SLAB_CTOR_CONSTRUCTOR) {
+		INIT_LIST_HEAD(&ei->i_prealloc_list) ;
+		inode_init_once(&ei->vfs_inode);
+		ei->i_acl_access = NULL;
+		ei->i_acl_default = NULL;
+	}
+}
+ 
+static int init_inodecache(void)
+{
+	reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
+					     sizeof(struct reiserfs_inode_info),
+					     0, SLAB_RECLAIM_ACCOUNT,
+					     init_once, NULL);
+	if (reiserfs_inode_cachep == NULL)
+		return -ENOMEM;
+	return 0;
+}
+
+static void destroy_inodecache(void)
+{
+	if (kmem_cache_destroy(reiserfs_inode_cachep))
+		reiserfs_warning (NULL, "reiserfs_inode_cache: not all structures were freed");
+}
+
+/* we don't mark inodes dirty, we just log them */
+static void reiserfs_dirty_inode (struct inode * inode) {
+    struct reiserfs_transaction_handle th ;
+
+    int err = 0;
+    if (inode->i_sb->s_flags & MS_RDONLY) {
+        reiserfs_warning(inode->i_sb, "clm-6006: writing inode %lu on readonly FS",
+	                  inode->i_ino) ;
+        return ;
+    }
+    reiserfs_write_lock(inode->i_sb);
+
+    /* this is really only used for atime updates, so they don't have
+    ** to be included in O_SYNC or fsync
+    */
+    err = journal_begin(&th, inode->i_sb, 1) ;
+    if (err) {
+        reiserfs_write_unlock (inode->i_sb);
+        return;
+    }
+    reiserfs_update_sd (&th, inode);
+    journal_end(&th, inode->i_sb, 1) ;
+    reiserfs_write_unlock(inode->i_sb);
+}
+
+static void reiserfs_clear_inode (struct inode *inode)
+{
+    struct posix_acl *acl;
+
+    acl = REISERFS_I(inode)->i_acl_access;
+    if (acl && !IS_ERR (acl))
+        posix_acl_release (acl);
+    REISERFS_I(inode)->i_acl_access = NULL;
+
+    acl = REISERFS_I(inode)->i_acl_default;
+    if (acl && !IS_ERR (acl))
+        posix_acl_release (acl);
+    REISERFS_I(inode)->i_acl_default = NULL;
+}
+
+#ifdef CONFIG_QUOTA
+static ssize_t reiserfs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
+static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t, loff_t);
+#endif
+
+static struct super_operations reiserfs_sops =
+{
+  .alloc_inode = reiserfs_alloc_inode,
+  .destroy_inode = reiserfs_destroy_inode,
+  .write_inode = reiserfs_write_inode,
+  .dirty_inode = reiserfs_dirty_inode,
+  .delete_inode = reiserfs_delete_inode,
+  .clear_inode  = reiserfs_clear_inode,
+  .put_super = reiserfs_put_super,
+  .write_super = reiserfs_write_super,
+  .sync_fs = reiserfs_sync_fs,
+  .write_super_lockfs = reiserfs_write_super_lockfs,
+  .unlockfs = reiserfs_unlockfs,
+  .statfs = reiserfs_statfs,
+  .remount_fs = reiserfs_remount,
+#ifdef CONFIG_QUOTA
+  .quota_read = reiserfs_quota_read,
+  .quota_write = reiserfs_quota_write,
+#endif
+};
+
+#ifdef CONFIG_QUOTA
+#define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
+
+static int reiserfs_dquot_initialize(struct inode *, int);
+static int reiserfs_dquot_drop(struct inode *);
+static int reiserfs_write_dquot(struct dquot *);
+static int reiserfs_acquire_dquot(struct dquot *);
+static int reiserfs_release_dquot(struct dquot *);
+static int reiserfs_mark_dquot_dirty(struct dquot *);
+static int reiserfs_write_info(struct super_block *, int);
+static int reiserfs_quota_on(struct super_block *, int, int, char *);
+
+static struct dquot_operations reiserfs_quota_operations =
+{
+  .initialize = reiserfs_dquot_initialize,
+  .drop = reiserfs_dquot_drop,
+  .alloc_space = dquot_alloc_space,
+  .alloc_inode = dquot_alloc_inode,
+  .free_space = dquot_free_space,
+  .free_inode = dquot_free_inode,
+  .transfer = dquot_transfer,
+  .write_dquot = reiserfs_write_dquot,
+  .acquire_dquot = reiserfs_acquire_dquot,
+  .release_dquot = reiserfs_release_dquot,
+  .mark_dirty = reiserfs_mark_dquot_dirty,
+  .write_info = reiserfs_write_info,
+};
+
+static struct quotactl_ops reiserfs_qctl_operations =
+{
+  .quota_on = reiserfs_quota_on,
+  .quota_off = vfs_quota_off,
+  .quota_sync = vfs_quota_sync,
+  .get_info = vfs_get_dqinfo,
+  .set_info = vfs_set_dqinfo,
+  .get_dqblk = vfs_get_dqblk,
+  .set_dqblk = vfs_set_dqblk,
+};
+#endif
+
+static struct export_operations reiserfs_export_ops = {
+  .encode_fh = reiserfs_encode_fh,
+  .decode_fh = reiserfs_decode_fh,
+  .get_parent = reiserfs_get_parent,
+  .get_dentry = reiserfs_get_dentry,
+} ;
+
+/* this struct is used in reiserfs_getopt () for containing the value for those
+   mount options that have values rather than being toggles. */
+typedef struct {
+    char * value;
+    int setmask; /* bitmask which is to set on mount_options bitmask when this
+                    value is found, 0 is no bits are to be changed. */
+    int clrmask; /* bitmask which is to clear on mount_options bitmask when  this
+		    value is found, 0 is no bits are to be changed. This is
+		    applied BEFORE setmask */
+} arg_desc_t;
+
+/* Set this bit in arg_required to allow empty arguments */
+#define REISERFS_OPT_ALLOWEMPTY 31
+
+/* this struct is used in reiserfs_getopt() for describing the set of reiserfs
+   mount options */
+typedef struct {
+    char * option_name;
+    int arg_required; /* 0 if argument is not required, not 0 otherwise */
+    const arg_desc_t * values; /* list of values accepted by an option */
+    int setmask; /* bitmask which is to set on mount_options bitmask when this
+                    value is found, 0 is no bits are to be changed. */
+    int clrmask; /* bitmask which is to clear on mount_options bitmask when  this
+		    value is found, 0 is no bits are to be changed. This is
+		    applied BEFORE setmask */
+} opt_desc_t;
+
+/* possible values for -o data= */
+static const arg_desc_t logging_mode[] = {
+    {"ordered", 1<<REISERFS_DATA_ORDERED, (1<<REISERFS_DATA_LOG|1<<REISERFS_DATA_WRITEBACK)},
+    {"journal", 1<<REISERFS_DATA_LOG, (1<<REISERFS_DATA_ORDERED|1<<REISERFS_DATA_WRITEBACK)},
+    {"writeback", 1<<REISERFS_DATA_WRITEBACK, (1<<REISERFS_DATA_ORDERED|1<<REISERFS_DATA_LOG)},
+    {NULL, 0}
+};
+
+/* possible values for -o barrier= */
+static const arg_desc_t barrier_mode[] = {
+    {"none", 1<<REISERFS_BARRIER_NONE, 1<<REISERFS_BARRIER_FLUSH},
+    {"flush", 1<<REISERFS_BARRIER_FLUSH, 1<<REISERFS_BARRIER_NONE},
+    {NULL, 0}
+};
+
+/* possible values for "-o block-allocator=" and bits which are to be set in
+   s_mount_opt of reiserfs specific part of in-core super block */
+static const arg_desc_t balloc[] = {
+    {"noborder", 1<<REISERFS_NO_BORDER, 0},
+    {"border", 0, 1<<REISERFS_NO_BORDER},
+    {"no_unhashed_relocation", 1<<REISERFS_NO_UNHASHED_RELOCATION, 0},
+    {"hashed_relocation", 1<<REISERFS_HASHED_RELOCATION, 0},
+    {"test4", 1<<REISERFS_TEST4, 0},
+    {"notest4", 0, 1<<REISERFS_TEST4},
+    {NULL, 0, 0}
+};
+
+static const arg_desc_t tails[] = {
+    {"on", 1<<REISERFS_LARGETAIL, 1<<REISERFS_SMALLTAIL},
+    {"off", 0, (1<<REISERFS_LARGETAIL)|(1<<REISERFS_SMALLTAIL)},
+    {"small", 1<<REISERFS_SMALLTAIL, 1<<REISERFS_LARGETAIL},
+    {NULL, 0, 0}
+};
+
+static const arg_desc_t error_actions[] = {
+    {"panic", 1 << REISERFS_ERROR_PANIC,
+              (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
+    {"ro-remount", 1 << REISERFS_ERROR_RO,
+              (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
+#ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
+    {"continue", 1 << REISERFS_ERROR_CONTINUE,
+              (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
+#endif
+    {NULL, 0, 0},
+};
+
+int reiserfs_default_io_size = 128 * 1024; /* Default recommended I/O size is 128k.
+					      There might be broken applications that are
+					      confused by this. Use nolargeio mount option
+					      to get usual i/o size = PAGE_SIZE.
+					    */
+
+/* proceed only one option from a list *cur - string containing of mount options
+   opts - array of options which are accepted
+   opt_arg - if option is found and requires an argument and if it is specifed
+   in the input - pointer to the argument is stored here
+   bit_flags - if option requires to set a certain bit - it is set here
+   return -1 if unknown option is found, opt->arg_required otherwise */
+static int reiserfs_getopt ( struct super_block * s, char ** cur, opt_desc_t * opts, char ** opt_arg,
+			    unsigned long * bit_flags)
+{
+    char * p;
+    /* foo=bar, 
+       ^   ^  ^
+       |   |  +-- option_end
+       |   +-- arg_start
+       +-- option_start
+    */
+    const opt_desc_t * opt;
+    const arg_desc_t * arg;
+    
+    
+    p = *cur;
+    
+    /* assume argument cannot contain commas */
+    *cur = strchr (p, ',');
+    if (*cur) {
+	*(*cur) = '\0';
+	(*cur) ++;
+    }
+
+    if ( !strncmp (p, "alloc=", 6) ) {
+	/* Ugly special case, probably we should redo options parser so that
+	   it can understand several arguments for some options, also so that
+	   it can fill several bitfields with option values. */
+	if ( reiserfs_parse_alloc_options( s, p + 6) ) {
+	    return -1;
+	} else {
+	    return 0;
+	}
+    }
+
+ 
+    /* for every option in the list */
+    for (opt = opts; opt->option_name; opt ++) {
+	if (!strncmp (p, opt->option_name, strlen (opt->option_name))) {
+	    if (bit_flags) {
+                if (opt->clrmask == (1 << REISERFS_UNSUPPORTED_OPT))
+                    reiserfs_warning (s, "%s not supported.", p);
+                else
+                    *bit_flags &= ~opt->clrmask;
+                if (opt->setmask == (1 << REISERFS_UNSUPPORTED_OPT))
+                    reiserfs_warning (s, "%s not supported.", p);
+                else
+                    *bit_flags |= opt->setmask;
+	    }
+	    break;
+	}
+    }
+    if (!opt->option_name) {
+	reiserfs_warning (s, "unknown mount option \"%s\"", p);
+	return -1;
+    }
+    
+    p += strlen (opt->option_name);
+    switch (*p) {
+    case '=':
+	if (!opt->arg_required) {
+	    reiserfs_warning (s, "the option \"%s\" does not require an argument",
+		    opt->option_name);
+	    return -1;
+	}
+	break;
+	
+    case 0:
+	if (opt->arg_required) {
+	    reiserfs_warning (s, "the option \"%s\" requires an argument", opt->option_name);
+	    return -1;
+	}
+	break;
+    default:
+	reiserfs_warning (s, "head of option \"%s\" is only correct", opt->option_name);
+	return -1;
+    }
+
+    /* move to the argument, or to next option if argument is not required */
+    p ++;
+    
+    if ( opt->arg_required && !(opt->arg_required & (1<<REISERFS_OPT_ALLOWEMPTY)) && !strlen (p) ) {
+	/* this catches "option=," if not allowed */
+	reiserfs_warning (s, "empty argument for \"%s\"", opt->option_name);
+	return -1;
+    }
+    
+    if (!opt->values) {
+	/* *=NULLopt_arg contains pointer to argument */
+	*opt_arg = p;
+	return opt->arg_required & ~(1<<REISERFS_OPT_ALLOWEMPTY);
+    }
+    
+    /* values possible for this option are listed in opt->values */
+    for (arg = opt->values; arg->value; arg ++) {
+	if (!strcmp (p, arg->value)) {
+	    if (bit_flags) {
+		*bit_flags &= ~arg->clrmask;
+		*bit_flags |= arg->setmask;
+	    }
+	    return opt->arg_required;
+	}
+    }
+    
+    reiserfs_warning (s, "bad value \"%s\" for option \"%s\"", p, opt->option_name);
+    return -1;
+}
+
+/* returns 0 if something is wrong in option string, 1 - otherwise */
+static int reiserfs_parse_options (struct super_block * s, char * options, /* string given via mount's -o */
+				   unsigned long * mount_options,
+				   /* after the parsing phase, contains the
+				      collection of bitflags defining what
+				      mount options were selected. */
+				   unsigned long * blocks, /* strtol-ed from NNN of resize=NNN */
+				   char ** jdev_name,
+				   unsigned int * commit_max_age)
+{
+    int c;
+    char * arg = NULL;
+    char * pos;
+    opt_desc_t opts[] = {
+	/* Compatibility stuff, so that -o notail for old setups still work */
+	{"tails",	.arg_required = 't', .values = tails},
+	{"notail",	.clrmask = (1<<REISERFS_LARGETAIL)|(1<<REISERFS_SMALLTAIL)},
+	{"conv",	.setmask = 1<<REISERFS_CONVERT},
+	{"attrs",	.setmask = 1<<REISERFS_ATTRS},
+	{"noattrs",	.clrmask = 1<<REISERFS_ATTRS},
+#ifdef CONFIG_REISERFS_FS_XATTR
+	{"user_xattr",	.setmask = 1<<REISERFS_XATTRS_USER},
+	{"nouser_xattr",.clrmask = 1<<REISERFS_XATTRS_USER},
+#else
+	{"user_xattr",	.setmask = 1<<REISERFS_UNSUPPORTED_OPT},
+	{"nouser_xattr",.clrmask = 1<<REISERFS_UNSUPPORTED_OPT},
+#endif
+#ifdef CONFIG_REISERFS_FS_POSIX_ACL
+	{"acl",		.setmask = 1<<REISERFS_POSIXACL},
+	{"noacl",	.clrmask = 1<<REISERFS_POSIXACL},
+#else
+	{"acl",		.setmask = 1<<REISERFS_UNSUPPORTED_OPT},
+	{"noacl",	.clrmask = 1<<REISERFS_UNSUPPORTED_OPT},
+#endif
+	{"nolog",},	 /* This is unsupported */
+	{"replayonly",	.setmask = 1<<REPLAYONLY},
+	{"block-allocator", .arg_required = 'a', .values = balloc},
+	{"data",	.arg_required = 'd', .values = logging_mode},
+	{"barrier",	.arg_required = 'b', .values = barrier_mode},
+	{"resize",	.arg_required = 'r', .values = NULL},
+	{"jdev",	.arg_required = 'j', .values = NULL},
+	{"nolargeio",	.arg_required = 'w', .values = NULL},
+	{"commit",	.arg_required = 'c', .values = NULL},
+	{"usrquota",},
+	{"grpquota",},
+	{"errors", 	.arg_required = 'e', .values = error_actions},
+	{"usrjquota",	.arg_required = 'u'|(1<<REISERFS_OPT_ALLOWEMPTY), .values = NULL},
+	{"grpjquota",	.arg_required = 'g'|(1<<REISERFS_OPT_ALLOWEMPTY), .values = NULL},
+	{"jqfmt",	.arg_required = 'f', .values = NULL},
+	{NULL,}
+    };
+	
+    *blocks = 0;
+    if (!options || !*options)
+	/* use default configuration: create tails, journaling on, no
+	   conversion to newest format */
+	return 1;
+    
+    for (pos = options; pos; ) {
+	c = reiserfs_getopt (s, &pos, opts, &arg, mount_options);
+	if (c == -1)
+	    /* wrong option is given */
+	    return 0;
+	
+	if (c == 'r') {
+	    char * p;
+	    
+	    p = NULL;
+	    /* "resize=NNN" */
+	    *blocks = simple_strtoul (arg, &p, 0);
+	    if (*p != '\0') {
+		/* NNN does not look like a number */
+		reiserfs_warning (s, "reiserfs_parse_options: bad value %s", arg);
+		return 0;
+	    }
+	}
+
+	if ( c == 'c' ) {
+		char *p = NULL;
+		unsigned long val = simple_strtoul (arg, &p, 0);
+		/* commit=NNN (time in seconds) */
+		if ( *p != '\0' || val >= (unsigned int)-1) {
+			reiserfs_warning (s, "reiserfs_parse_options: bad value %s", arg);			return 0;
+		}
+		*commit_max_age = (unsigned int)val;
+	}
+
+	if ( c == 'w' ) {
+		char *p=NULL;
+		int val = simple_strtoul (arg, &p, 0);
+
+		if ( *p != '\0') {
+		    reiserfs_warning (s, "reiserfs_parse_options: non-numeric value %s for nolargeio option", arg);
+		    return 0;
+		}
+		if ( val ) 
+		    reiserfs_default_io_size = PAGE_SIZE;
+		else
+		    reiserfs_default_io_size = 128 * 1024;
+	}
+
+	if (c == 'j') {
+	    if (arg && *arg && jdev_name) {
+		if ( *jdev_name ) { //Hm, already assigned?
+		    reiserfs_warning (s, "reiserfs_parse_options: journal device was already  specified to be %s", *jdev_name);
+		    return 0;
+		}
+		*jdev_name = arg;
+	    }
+	}
+
+#ifdef CONFIG_QUOTA
+	if (c == 'u' || c == 'g') {
+	    int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
+
+	    if (sb_any_quota_enabled(s)) {
+		reiserfs_warning(s, "reiserfs_parse_options: cannot change journalled quota options when quota turned on.");
+		return 0;
+	    }
+	    if (*arg) {	/* Some filename specified? */
+	        if (REISERFS_SB(s)->s_qf_names[qtype] && strcmp(REISERFS_SB(s)->s_qf_names[qtype], arg)) {
+		    reiserfs_warning(s, "reiserfs_parse_options: %s quota file already specified.", QTYPE2NAME(qtype));
+		    return 0;
+		}
+		if (strchr(arg, '/')) {
+		    reiserfs_warning(s, "reiserfs_parse_options: quotafile must be on filesystem root.");
+		    return 0;
+		}
+	    	REISERFS_SB(s)->s_qf_names[qtype] = kmalloc(strlen(arg)+1, GFP_KERNEL);
+		if (!REISERFS_SB(s)->s_qf_names[qtype]) {
+		    reiserfs_warning(s, "reiserfs_parse_options: not enough memory for storing quotafile name.");
+		    return 0;
+		}
+		strcpy(REISERFS_SB(s)->s_qf_names[qtype], arg);
+	    }
+	    else {
+		if (REISERFS_SB(s)->s_qf_names[qtype]) {
+		    kfree(REISERFS_SB(s)->s_qf_names[qtype]);
+		    REISERFS_SB(s)->s_qf_names[qtype] = NULL;
+		}
+	    }
+	}
+	if (c == 'f') {
+	    if (!strcmp(arg, "vfsold"))
+		REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_OLD;
+	    else if (!strcmp(arg, "vfsv0"))
+		REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_V0;
+	    else {
+		reiserfs_warning(s, "reiserfs_parse_options: unknown quota format specified.");
+		return 0;
+	    }
+	}
+#else
+	if (c == 'u' || c == 'g' || c == 'f') {
+	    reiserfs_warning(s, "reiserfs_parse_options: journalled quota options not supported.");
+	    return 0;
+	}
+#endif
+    }
+    
+#ifdef CONFIG_QUOTA
+    if (!REISERFS_SB(s)->s_jquota_fmt && (REISERFS_SB(s)->s_qf_names[USRQUOTA] || REISERFS_SB(s)->s_qf_names[GRPQUOTA])) {
+	reiserfs_warning(s, "reiserfs_parse_options: journalled quota format not specified.");
+	return 0;
+    }
+#endif
+    return 1;
+}
+
+static void switch_data_mode(struct super_block *s, unsigned long mode) {
+    REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
+                                       (1 << REISERFS_DATA_ORDERED) |
+				       (1 << REISERFS_DATA_WRITEBACK));
+    REISERFS_SB(s)->s_mount_opt |= (1 << mode);
+}
+
+static void handle_data_mode(struct super_block *s, unsigned long mount_options)
+{
+    if (mount_options & (1 << REISERFS_DATA_LOG)) {
+        if (!reiserfs_data_log(s)) {
+	    switch_data_mode(s, REISERFS_DATA_LOG);
+	    reiserfs_info (s, "switching to journaled data mode\n");
+	}
+    } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
+        if (!reiserfs_data_ordered(s)) {
+	    switch_data_mode(s, REISERFS_DATA_ORDERED);
+	    reiserfs_info (s, "switching to ordered data mode\n");
+	}
+    } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
+        if (!reiserfs_data_writeback(s)) {
+	    switch_data_mode(s, REISERFS_DATA_WRITEBACK);
+	    reiserfs_info (s, "switching to writeback data mode\n");
+	}
+    }
+}
+
+static void handle_barrier_mode(struct super_block *s, unsigned long bits) {
+    int flush = (1 << REISERFS_BARRIER_FLUSH);
+    int none = (1 << REISERFS_BARRIER_NONE);
+    int all_barrier = flush | none;
+
+    if (bits & all_barrier) {
+        REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
+	if (bits & flush) {
+	    REISERFS_SB(s)->s_mount_opt |= flush;
+	    printk("reiserfs: enabling write barrier flush mode\n");
+	} else if (bits & none) {
+	    REISERFS_SB(s)->s_mount_opt |= none;
+	    printk("reiserfs: write barriers turned off\n");
+	}
+   }
+}
+
+static void handle_attrs( struct super_block *s )
+{
+	struct reiserfs_super_block * rs;
+
+	if( reiserfs_attrs( s ) ) {
+		rs = SB_DISK_SUPER_BLOCK (s);
+		if( old_format_only(s) ) {
+			reiserfs_warning(s, "reiserfs: cannot support attributes on 3.5.x disk format" );
+			REISERFS_SB(s) -> s_mount_opt &= ~ ( 1 << REISERFS_ATTRS );
+			return;
+		}
+		if( !( le32_to_cpu( rs -> s_flags ) & reiserfs_attrs_cleared ) ) {
+				reiserfs_warning(s, "reiserfs: cannot support attributes until flag is set in super-block" );
+				REISERFS_SB(s) -> s_mount_opt &= ~ ( 1 << REISERFS_ATTRS );
+		}
+	}
+}
+
+static int reiserfs_remount (struct super_block * s, int * mount_flags, char * arg)
+{
+  struct reiserfs_super_block * rs;
+  struct reiserfs_transaction_handle th ;
+  unsigned long blocks;
+  unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
+  unsigned long safe_mask = 0;
+  unsigned int commit_max_age = (unsigned int)-1;
+  struct reiserfs_journal *journal = SB_JOURNAL(s);
+  int err;
+#ifdef CONFIG_QUOTA
+  int i;
+#endif
+
+  rs = SB_DISK_SUPER_BLOCK (s);
+
+  if (!reiserfs_parse_options(s, arg, &mount_options, &blocks, NULL, &commit_max_age)) {
+#ifdef CONFIG_QUOTA
+    for (i = 0; i < MAXQUOTAS; i++)
+	if (REISERFS_SB(s)->s_qf_names[i]) {
+	    kfree(REISERFS_SB(s)->s_qf_names[i]);
+	    REISERFS_SB(s)->s_qf_names[i] = NULL;
+	}
+#endif
+    return -EINVAL;
+  }
+  
+  handle_attrs(s);
+
+  /* Add options that are safe here */
+  safe_mask |= 1 << REISERFS_SMALLTAIL;
+  safe_mask |= 1 << REISERFS_LARGETAIL;
+  safe_mask |= 1 << REISERFS_NO_BORDER;
+  safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
+  safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
+  safe_mask |= 1 << REISERFS_TEST4;
+  safe_mask |= 1 << REISERFS_ATTRS;
+  safe_mask |= 1 << REISERFS_XATTRS_USER;
+  safe_mask |= 1 << REISERFS_POSIXACL;
+  safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
+  safe_mask |= 1 << REISERFS_BARRIER_NONE;
+  safe_mask |= 1 << REISERFS_ERROR_RO;
+  safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
+  safe_mask |= 1 << REISERFS_ERROR_PANIC;
+
+  /* Update the bitmask, taking care to keep
+   * the bits we're not allowed to change here */
+  REISERFS_SB(s)->s_mount_opt = (REISERFS_SB(s)->s_mount_opt & ~safe_mask) |  (mount_options & safe_mask);
+
+  if(commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
+    journal->j_max_commit_age = commit_max_age;
+    journal->j_max_trans_age = commit_max_age;
+  }
+  else if(commit_max_age == 0)
+  {
+    /* 0 means restore defaults. */
+    journal->j_max_commit_age = journal->j_default_max_commit_age;
+    journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
+  }
+
+  if(blocks) {
+    int rc = reiserfs_resize(s, blocks);
+    if (rc != 0)
+      return rc;
+  }
+
+  if (*mount_flags & MS_RDONLY) {
+    reiserfs_xattr_init (s, *mount_flags);
+    /* remount read-only */
+    if (s->s_flags & MS_RDONLY)
+      /* it is read-only already */
+      return 0;
+    /* try to remount file system with read-only permissions */
+    if (sb_umount_state(rs) == REISERFS_VALID_FS || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
+      return 0;
+    }
+
+    err = journal_begin(&th, s, 10) ;
+    if (err)
+        return err;
+
+    /* Mounting a rw partition read-only. */
+    reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ;
+    set_sb_umount_state( rs, REISERFS_SB(s)->s_mount_state );
+    journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
+  } else {
+    /* remount read-write */
+    if (!(s->s_flags & MS_RDONLY)) {
+	reiserfs_xattr_init (s, *mount_flags);
+	return 0; /* We are read-write already */
+    }
+
+    if (reiserfs_is_journal_aborted (journal))
+	return journal->j_errno;
+
+    handle_data_mode(s, mount_options);
+    handle_barrier_mode(s, mount_options);
+    REISERFS_SB(s)->s_mount_state = sb_umount_state(rs) ;
+    s->s_flags &= ~MS_RDONLY ; /* now it is safe to call journal_begin */
+    err = journal_begin(&th, s, 10) ;
+    if (err)
+	return err;
+    
+    /* Mount a partition which is read-only, read-write */
+    reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ;
+    REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
+    s->s_flags &= ~MS_RDONLY;
+    set_sb_umount_state( rs, REISERFS_ERROR_FS );
+    /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
+    journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
+    REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS ;
+  }
+  /* this will force a full flush of all journal lists */
+  SB_JOURNAL(s)->j_must_wait = 1 ;
+  err = journal_end(&th, s, 10) ;
+  if (err)
+    return err;
+  s->s_dirt = 0;
+
+  if (!( *mount_flags & MS_RDONLY ) ) {
+    finish_unfinished( s );
+    reiserfs_xattr_init (s, *mount_flags);
+  }
+
+  return 0;
+}
+
+/* load_bitmap_info_data - Sets up the reiserfs_bitmap_info structure from disk.
+ * @sb - superblock for this filesystem
+ * @bi - the bitmap info to be loaded. Requires that bi->bh is valid.
+ *
+ * This routine counts how many free bits there are, finding the first zero
+ * as a side effect. Could also be implemented as a loop of test_bit() calls, or
+ * a loop of find_first_zero_bit() calls. This implementation is similar to
+ * find_first_zero_bit(), but doesn't return after it finds the first bit.
+ * Should only be called on fs mount, but should be fairly efficient anyways.
+ *
+ * bi->first_zero_hint is considered unset if it == 0, since the bitmap itself
+ * will * invariably occupt block 0 represented in the bitmap. The only
+ * exception to this is when free_count also == 0, since there will be no
+ * free blocks at all.
+ */
+
+static void load_bitmap_info_data (struct super_block *sb,
+                                   struct reiserfs_bitmap_info *bi)
+{
+    unsigned long *cur = (unsigned long *)bi->bh->b_data;
+
+    while ((char *)cur < (bi->bh->b_data + sb->s_blocksize)) {
+
+	/* No need to scan if all 0's or all 1's.
+	 * Since we're only counting 0's, we can simply ignore all 1's */
+	if (*cur == 0) {
+	    if (bi->first_zero_hint == 0) {
+		bi->first_zero_hint = ((char *)cur - bi->bh->b_data) << 3;
+	    }
+	    bi->free_count += sizeof(unsigned long)*8;
+	} else if (*cur != ~0L) {
+	    int b;
+	    for (b = 0; b < sizeof(unsigned long)*8; b++) {
+		if (!reiserfs_test_le_bit (b, cur)) {
+		    bi->free_count ++;
+		    if (bi->first_zero_hint == 0)
+			bi->first_zero_hint =
+					(((char *)cur - bi->bh->b_data) << 3) + b;
+		    }
+		}
+	    }
+	cur ++;
+    }
+
+#ifdef CONFIG_REISERFS_CHECK
+// This outputs a lot of unneded info on big FSes
+//    reiserfs_warning ("bitmap loaded from block %d: %d free blocks",
+//		      bi->bh->b_blocknr, bi->free_count);
+#endif
+}
+  
+static int read_bitmaps (struct super_block * s)
+{
+    int i, bmap_nr;
+
+    SB_AP_BITMAP (s) = vmalloc (sizeof (struct reiserfs_bitmap_info) * SB_BMAP_NR(s));
+    if (SB_AP_BITMAP (s) == 0)
+	return 1;
+    memset (SB_AP_BITMAP (s), 0, sizeof (struct reiserfs_bitmap_info) * SB_BMAP_NR(s));
+    for (i = 0, bmap_nr = REISERFS_DISK_OFFSET_IN_BYTES / s->s_blocksize + 1;
+	 i < SB_BMAP_NR(s); i++, bmap_nr = s->s_blocksize * 8 * i) {
+	SB_AP_BITMAP (s)[i].bh = sb_getblk(s, bmap_nr);
+	if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh))
+	    ll_rw_block(READ, 1, &SB_AP_BITMAP(s)[i].bh);
+    }
+    for (i = 0; i < SB_BMAP_NR(s); i++) {
+	wait_on_buffer(SB_AP_BITMAP (s)[i].bh);
+	if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) {
+	    reiserfs_warning(s,"sh-2029: reiserfs read_bitmaps: "
+			 "bitmap block (#%lu) reading failed",
+			 SB_AP_BITMAP(s)[i].bh->b_blocknr);
+	    for (i = 0; i < SB_BMAP_NR(s); i++)
+		brelse(SB_AP_BITMAP(s)[i].bh);
+	    vfree(SB_AP_BITMAP(s));
+	    SB_AP_BITMAP(s) = NULL;
+	    return 1;
+	}
+	load_bitmap_info_data (s, SB_AP_BITMAP (s) + i);
+    }
+    return 0;
+}
+
+static int read_old_bitmaps (struct super_block * s)
+{
+  int i ;
+  struct reiserfs_super_block * rs = SB_DISK_SUPER_BLOCK(s);
+  int bmp1 = (REISERFS_OLD_DISK_OFFSET_IN_BYTES / s->s_blocksize) + 1;  /* first of bitmap blocks */
+
+  /* read true bitmap */
+  SB_AP_BITMAP (s) = vmalloc (sizeof (struct reiserfs_buffer_info *) * sb_bmap_nr(rs));
+  if (SB_AP_BITMAP (s) == 0)
+    return 1;
+
+  memset (SB_AP_BITMAP (s), 0, sizeof (struct reiserfs_buffer_info *) * sb_bmap_nr(rs));
+
+  for (i = 0; i < sb_bmap_nr(rs); i ++) {
+    SB_AP_BITMAP (s)[i].bh = sb_bread (s, bmp1 + i);
+    if (!SB_AP_BITMAP (s)[i].bh)
+      return 1;
+    load_bitmap_info_data (s, SB_AP_BITMAP (s) + i);
+  }
+
+  return 0;
+}
+
+static int read_super_block (struct super_block * s, int offset)
+{
+    struct buffer_head * bh;
+    struct reiserfs_super_block * rs;
+    int fs_blocksize;
+ 
+
+    bh = sb_bread (s, offset / s->s_blocksize);
+    if (!bh) {
+      reiserfs_warning (s, "sh-2006: read_super_block: "
+              "bread failed (dev %s, block %lu, size %lu)",
+              reiserfs_bdevname (s), offset / s->s_blocksize, s->s_blocksize);
+      return 1;
+    }
+ 
+    rs = (struct reiserfs_super_block *)bh->b_data;
+    if (!is_any_reiserfs_magic_string (rs)) {
+      brelse (bh);
+      return 1;
+    }
+ 
+    //
+    // ok, reiserfs signature (old or new) found in at the given offset
+    //    
+    fs_blocksize = sb_blocksize(rs);
+    brelse (bh);
+    sb_set_blocksize (s, fs_blocksize);
+    
+    bh = sb_bread (s, offset / s->s_blocksize);
+    if (!bh) {
+	reiserfs_warning (s, "sh-2007: read_super_block: "
+                "bread failed (dev %s, block %lu, size %lu)\n",
+                reiserfs_bdevname (s), offset / s->s_blocksize, s->s_blocksize);
+	return 1;
+    }
+    
+    rs = (struct reiserfs_super_block *)bh->b_data;
+    if (sb_blocksize(rs) != s->s_blocksize) {
+	reiserfs_warning (s, "sh-2011: read_super_block: "
+		"can't find a reiserfs filesystem on (dev %s, block %Lu, size %lu)\n",
+		reiserfs_bdevname (s), (unsigned long long)bh->b_blocknr, s->s_blocksize);
+	brelse (bh);
+	return 1;
+    }
+
+    if ( rs->s_v1.s_root_block == -1 ) {
+       brelse(bh) ;
+       reiserfs_warning (s, "Unfinished reiserfsck --rebuild-tree run detected. Please run\n"
+              "reiserfsck --rebuild-tree and wait for a completion. If that fails\n"
+              "get newer reiserfsprogs package");
+       return 1;
+    }
+
+    SB_BUFFER_WITH_SB (s) = bh;
+    SB_DISK_SUPER_BLOCK (s) = rs;
+
+    if (is_reiserfs_jr (rs)) {
+	/* magic is of non-standard journal filesystem, look at s_version to
+	   find which format is in use */
+	if (sb_version(rs) == REISERFS_VERSION_2)
+	  reiserfs_warning (s, "read_super_block: found reiserfs format \"3.6\""
+		  " with non-standard journal");
+	else if (sb_version(rs) == REISERFS_VERSION_1)
+	  reiserfs_warning (s, "read_super_block: found reiserfs format \"3.5\""
+		  " with non-standard journal");
+	else {
+	  reiserfs_warning (s, "sh-2012: read_super_block: found unknown "
+			    "format \"%u\" of reiserfs with non-standard magic",
+			    sb_version(rs));
+	return 1;
+	}
+    }
+    else
+      /* s_version of standard format may contain incorrect information,
+	 so we just look at the magic string */
+      reiserfs_info (s, "found reiserfs format \"%s\" with standard journal\n",
+	      is_reiserfs_3_5 (rs) ? "3.5" : "3.6");
+
+    s->s_op = &reiserfs_sops;
+    s->s_export_op = &reiserfs_export_ops;
+#ifdef CONFIG_QUOTA
+    s->s_qcop = &reiserfs_qctl_operations;
+    s->dq_op = &reiserfs_quota_operations;
+#endif
+
+    /* new format is limited by the 32 bit wide i_blocks field, want to
+    ** be one full block below that.
+    */
+    s->s_maxbytes = (512LL << 32) - s->s_blocksize ;
+    return 0;
+}
+
+
+
+/* after journal replay, reread all bitmap and super blocks */
+static int reread_meta_blocks(struct super_block *s) {
+  int i ;
+  ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s))) ;
+  wait_on_buffer(SB_BUFFER_WITH_SB(s)) ;
+  if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
+    reiserfs_warning (s, "reread_meta_blocks, error reading the super") ;
+    return 1 ;
+  }
+
+  for (i = 0; i < SB_BMAP_NR(s) ; i++) {
+    ll_rw_block(READ, 1, &(SB_AP_BITMAP(s)[i].bh)) ;
+    wait_on_buffer(SB_AP_BITMAP(s)[i].bh) ;
+    if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) {
+      reiserfs_warning (s, "reread_meta_blocks, error reading bitmap block number %d at %llu",
+        i, (unsigned long long)SB_AP_BITMAP(s)[i].bh->b_blocknr) ;
+      return 1 ;
+    }
+  }
+  return 0 ;
+
+}
+
+
+/////////////////////////////////////////////////////
+// hash detection stuff
+
+
+// if root directory is empty - we set default - Yura's - hash and
+// warn about it
+// FIXME: we look for only one name in a directory. If tea and yura
+// bith have the same value - we ask user to send report to the
+// mailing list
+static __u32 find_hash_out (struct super_block * s)
+{
+    int retval;
+    struct inode * inode;
+    struct cpu_key key;
+    INITIALIZE_PATH (path);
+    struct reiserfs_dir_entry de;
+    __u32 hash = DEFAULT_HASH;
+
+    inode = s->s_root->d_inode;
+
+    do { // Some serious "goto"-hater was there ;)
+	u32 teahash, r5hash, yurahash;
+
+	make_cpu_key (&key, inode, ~0, TYPE_DIRENTRY, 3);
+	retval = search_by_entry_key (s, &key, &path, &de);
+	if (retval == IO_ERROR) {
+	    pathrelse (&path);
+	    return UNSET_HASH ;
+	}
+	if (retval == NAME_NOT_FOUND)
+	    de.de_entry_num --;
+	set_de_name_and_namelen (&de);
+	if (deh_offset( &(de.de_deh[de.de_entry_num]) ) == DOT_DOT_OFFSET) {
+	    /* allow override in this case */
+	    if (reiserfs_rupasov_hash(s)) {
+		hash = YURA_HASH ;
+	    }
+	    reiserfs_warning(s,"FS seems to be empty, autodetect "
+	                     "is using the default hash");
+	    break;
+	}
+	r5hash=GET_HASH_VALUE (r5_hash (de.de_name, de.de_namelen));
+	teahash=GET_HASH_VALUE (keyed_hash (de.de_name, de.de_namelen));
+	yurahash=GET_HASH_VALUE (yura_hash (de.de_name, de.de_namelen));
+	if ( ( (teahash == r5hash) && (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash) ) ||
+	     ( (teahash == yurahash) && (yurahash == GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])))) ) ||
+	     ( (r5hash == yurahash) && (yurahash == GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])))) ) ) {
+	    reiserfs_warning(s,"Unable to automatically detect hash function. "
+			     "Please mount with -o hash={tea,rupasov,r5}",
+			     reiserfs_bdevname (s));
+	    hash = UNSET_HASH;
+	    break;
+	}
+	if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == yurahash)
+	    hash = YURA_HASH;
+	else if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == teahash)
+	    hash = TEA_HASH;
+	else if (GET_HASH_VALUE( deh_offset(&(de.de_deh[de.de_entry_num])) ) == r5hash)
+	    hash = R5_HASH;
+	else {
+	    reiserfs_warning (s,"Unrecognised hash function");
+	    hash = UNSET_HASH;
+	}
+    } while (0);
+
+    pathrelse (&path);
+    return hash;
+}
+
+// finds out which hash names are sorted with
+static int what_hash (struct super_block * s)
+{
+    __u32 code;
+
+    code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
+
+    /* reiserfs_hash_detect() == true if any of the hash mount options
+    ** were used.  We must check them to make sure the user isn't
+    ** using a bad hash value
+    */
+    if (code == UNSET_HASH || reiserfs_hash_detect(s))
+	code = find_hash_out (s);
+
+    if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
+	/* detection has found the hash, and we must check against the 
+	** mount options 
+	*/
+	if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
+	    reiserfs_warning (s, "Error, %s hash detected, "
+		   "unable to force rupasov hash", reiserfs_hashname(code)) ;
+	    code = UNSET_HASH ;
+	} else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
+	    reiserfs_warning (s, "Error, %s hash detected, "
+		   "unable to force tea hash", reiserfs_hashname(code)) ;
+	    code = UNSET_HASH ;
+	} else if (reiserfs_r5_hash(s) && code != R5_HASH) {
+	    reiserfs_warning (s, "Error, %s hash detected, "
+		   "unable to force r5 hash", reiserfs_hashname(code)) ;
+	    code = UNSET_HASH ;
+	} 
+    } else { 
+        /* find_hash_out was not called or could not determine the hash */
+	if (reiserfs_rupasov_hash(s)) {
+	    code = YURA_HASH ;
+	} else if (reiserfs_tea_hash(s)) {
+	    code = TEA_HASH ;
+	} else if (reiserfs_r5_hash(s)) {
+	    code = R5_HASH ;
+	} 
+    }
+
+    /* if we are mounted RW, and we have a new valid hash code, update 
+    ** the super
+    */
+    if (code != UNSET_HASH && 
+	!(s->s_flags & MS_RDONLY) && 
+        code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
+        set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
+    }
+    return code;
+}
+
+// return pointer to appropriate function
+static hashf_t hash_function (struct super_block * s)
+{
+    switch (what_hash (s)) {
+    case TEA_HASH:
+	reiserfs_info (s, "Using tea hash to sort names\n");
+	return keyed_hash;
+    case YURA_HASH:
+	reiserfs_info (s, "Using rupasov hash to sort names\n");
+	return yura_hash;
+    case R5_HASH:
+	reiserfs_info (s, "Using r5 hash to sort names\n");
+	return r5_hash;
+    }
+    return NULL;
+}
+
+// this is used to set up correct value for old partitions
+static int function2code (hashf_t func)
+{
+    if (func == keyed_hash)
+	return TEA_HASH;
+    if (func == yura_hash)
+	return YURA_HASH;
+    if (func == r5_hash)
+	return R5_HASH;
+
+    BUG() ; // should never happen
+
+    return 0;
+}
+
+#define SWARN(silent, s, ...)			\
+	if (!(silent))				\
+		reiserfs_warning (s, __VA_ARGS__)
+
+static int reiserfs_fill_super (struct super_block * s, void * data, int silent)
+{
+    struct inode *root_inode;
+    int j;
+    struct reiserfs_transaction_handle th ;
+    int old_format = 0;
+    unsigned long blocks;
+    unsigned int commit_max_age = 0;
+    int jinit_done = 0 ;
+    struct reiserfs_iget_args args ;
+    struct reiserfs_super_block * rs;
+    char *jdev_name;
+    struct reiserfs_sb_info *sbi;
+    int errval = -EINVAL;
+
+    sbi = kmalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
+    if (!sbi) {
+	errval = -ENOMEM;
+	goto error;
+    }
+    s->s_fs_info = sbi;
+    memset (sbi, 0, sizeof (struct reiserfs_sb_info));
+    /* Set default values for options: non-aggressive tails, RO on errors */
+    REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
+    REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
+    /* no preallocation minimum, be smart in
+       reiserfs_file_write instead */
+    REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
+    /* Preallocate by 16 blocks (17-1) at once */
+    REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
+    /* Initialize the rwsem for xattr dir */
+    init_rwsem(&REISERFS_SB(s)->xattr_dir_sem);
+
+    /* setup default block allocator options */
+    reiserfs_init_alloc_options(s);
+
+    jdev_name = NULL;
+    if (reiserfs_parse_options (s, (char *) data, &(sbi->s_mount_opt), &blocks, &jdev_name, &commit_max_age) == 0) {
+	goto error;
+    }
+
+    if (blocks) {
+	SWARN (silent, s, "jmacd-7: reiserfs_fill_super: resize option "
+	       "for remount only");
+	goto error;
+    }	
+
+    /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
+    if (!read_super_block (s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
+      old_format = 1;
+    /* try new format (64-th 1k block), which can contain reiserfs super block */
+    else if (read_super_block (s, REISERFS_DISK_OFFSET_IN_BYTES)) {
+      SWARN(silent, s, "sh-2021: reiserfs_fill_super: can not find reiserfs on %s", reiserfs_bdevname (s));
+      goto error;
+    }
+
+    rs = SB_DISK_SUPER_BLOCK (s);
+    /* Let's do basic sanity check to verify that underlying device is not
+       smaller than the filesystem. If the check fails then abort and scream,
+       because bad stuff will happen otherwise. */
+    if ( s->s_bdev && s->s_bdev->bd_inode && i_size_read(s->s_bdev->bd_inode) < sb_block_count(rs)*sb_blocksize(rs)) {
+	SWARN (silent, s, "Filesystem on %s cannot be mounted because it is bigger than the device", reiserfs_bdevname(s));
+	SWARN(silent, s, "You may need to run fsck or increase size of your LVM partition");
+	SWARN(silent, s, "Or may be you forgot to reboot after fdisk when it told you to");
+	goto error;
+    }
+
+    sbi->s_mount_state = SB_REISERFS_STATE(s);
+    sbi->s_mount_state = REISERFS_VALID_FS ;
+
+    if (old_format ? read_old_bitmaps(s) : read_bitmaps(s)) {
+	SWARN(silent, s, "jmacd-8: reiserfs_fill_super: unable to read bitmap");
+	goto error;
+    }
+#ifdef CONFIG_REISERFS_CHECK
+    SWARN (silent, s, "CONFIG_REISERFS_CHECK is set ON");
+    SWARN (silent, s, "- it is slow mode for debugging.");
+#endif
+
+    /* make data=ordered the default */
+    if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
+        !reiserfs_data_writeback(s))
+    {
+         REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
+    }
+
+    if (reiserfs_data_log(s)) {
+        reiserfs_info (s, "using journaled data mode\n");
+    } else if (reiserfs_data_ordered(s)) {
+        reiserfs_info (s, "using ordered data mode\n");
+    } else {
+        reiserfs_info (s, "using writeback data mode\n");
+    }
+    if (reiserfs_barrier_flush(s)) {
+    	printk("reiserfs: using flush barriers\n");
+    }
+
+    // set_device_ro(s->s_dev, 1) ;
+    if( journal_init(s, jdev_name, old_format, commit_max_age) ) {
+	SWARN(silent, s, "sh-2022: reiserfs_fill_super: unable to initialize journal space") ;
+	goto error ;
+    } else {
+	jinit_done = 1 ; /* once this is set, journal_release must be called
+			 ** if we error out of the mount
+			 */
+    }
+    if (reread_meta_blocks(s)) {
+	SWARN(silent, s, "jmacd-9: reiserfs_fill_super: unable to reread meta blocks after journal init") ;
+	goto error ;
+    }
+
+    if (replay_only (s))
+	goto error;
+
+    if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
+        SWARN(silent, s, "clm-7000: Detected readonly device, marking FS readonly") ;
+	s->s_flags |= MS_RDONLY ;
+    }
+    args.objectid = REISERFS_ROOT_OBJECTID ;
+    args.dirid = REISERFS_ROOT_PARENT_OBJECTID ;
+    root_inode = iget5_locked (s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor, reiserfs_init_locked_inode, (void *)(&args));
+    if (!root_inode) {
+	SWARN(silent, s, "jmacd-10: reiserfs_fill_super: get root inode failed");
+	goto error;
+    }
+
+    if (root_inode->i_state & I_NEW) {
+	reiserfs_read_locked_inode(root_inode, &args);
+	unlock_new_inode(root_inode);
+    }
+
+    s->s_root = d_alloc_root(root_inode);  
+    if (!s->s_root) {
+	iput(root_inode);
+	goto error;
+    }
+
+    // define and initialize hash function
+    sbi->s_hash_function = hash_function (s);
+    if (sbi->s_hash_function == NULL) {
+      dput(s->s_root) ;
+      s->s_root = NULL ;
+      goto error ;
+    }
+
+    if (is_reiserfs_3_5 (rs) || (is_reiserfs_jr (rs) && SB_VERSION (s) == REISERFS_VERSION_1))
+	set_bit(REISERFS_3_5, &(sbi->s_properties));
+    else
+	set_bit(REISERFS_3_6, &(sbi->s_properties));
+    
+    if (!(s->s_flags & MS_RDONLY)) {
+
+	errval = journal_begin(&th, s, 1) ;
+        if (errval) {
+	    dput (s->s_root);
+	    s->s_root = NULL;
+	    goto error;
+        }
+	reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1) ;
+
+        set_sb_umount_state( rs, REISERFS_ERROR_FS );
+	set_sb_fs_state (rs, 0);
+	
+	if (old_format_only(s)) {
+	  /* filesystem of format 3.5 either with standard or non-standard
+	     journal */
+	  if (convert_reiserfs (s)) {
+	    /* and -o conv is given */
+	    if(!silent)
+	      reiserfs_info (s,"converting 3.5 filesystem to the 3.6 format") ;
+
+	    if (is_reiserfs_3_5 (rs))
+	      /* put magic string of 3.6 format. 2.2 will not be able to
+		 mount this filesystem anymore */
+	      memcpy (rs->s_v1.s_magic, reiserfs_3_6_magic_string,
+		      sizeof (reiserfs_3_6_magic_string));
+
+	    set_sb_version(rs,REISERFS_VERSION_2);
+	    reiserfs_convert_objectid_map_v1(s) ;
+	    set_bit(REISERFS_3_6, &(sbi->s_properties));
+	    clear_bit(REISERFS_3_5, &(sbi->s_properties));
+	  } else if (!silent){
+	    reiserfs_info (s, "using 3.5.x disk format\n") ;
+	  }
+	}
+
+	journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
+	errval = journal_end(&th, s, 1) ;
+	if (errval) {
+	    dput (s->s_root);
+	    s->s_root = NULL;
+	    goto error;
+	}
+
+	if ((errval = reiserfs_xattr_init (s, s->s_flags))) {
+	    dput (s->s_root);
+	    s->s_root = NULL;
+	    goto error;
+	}
+
+	/* look for files which were to be removed in previous session */
+	finish_unfinished (s);
+    } else {
+	if ( old_format_only(s) && !silent) {
+	    reiserfs_info (s, "using 3.5.x disk format\n") ;
+	}
+
+	if ((errval = reiserfs_xattr_init (s, s->s_flags))) {
+	    dput (s->s_root);
+	    s->s_root = NULL;
+	    goto error;
+	}
+    }
+    // mark hash in super block: it could be unset. overwrite should be ok
+    set_sb_hash_function_code( rs, function2code(sbi->s_hash_function ) );
+
+    handle_attrs( s );
+
+    reiserfs_proc_info_init( s );
+
+    init_waitqueue_head (&(sbi->s_wait));
+    spin_lock_init(&sbi->bitmap_lock);
+
+    return (0);
+
+ error:
+    if (jinit_done) { /* kill the commit thread, free journal ram */
+	journal_release_error(NULL, s) ;
+    }
+    if (SB_DISK_SUPER_BLOCK (s)) {
+	for (j = 0; j < SB_BMAP_NR (s); j ++) {
+	    if (SB_AP_BITMAP (s))
+		brelse (SB_AP_BITMAP (s)[j].bh);
+	}
+	if (SB_AP_BITMAP (s))
+	    vfree (SB_AP_BITMAP (s));
+    }
+    if (SB_BUFFER_WITH_SB (s))
+	brelse(SB_BUFFER_WITH_SB (s));
+#ifdef CONFIG_QUOTA
+    for (j = 0; j < MAXQUOTAS; j++) {
+	if (sbi->s_qf_names[j])
+	    kfree(sbi->s_qf_names[j]);
+    }
+#endif
+    if (sbi != NULL) {
+	kfree(sbi);
+    }
+
+    s->s_fs_info = NULL;
+    return errval;
+}
+
+
+static int reiserfs_statfs (struct super_block * s, struct kstatfs * buf)
+{
+  struct reiserfs_super_block * rs = SB_DISK_SUPER_BLOCK (s);
+  
+  buf->f_namelen = (REISERFS_MAX_NAME (s->s_blocksize));
+  buf->f_bfree   = sb_free_blocks(rs);
+  buf->f_bavail  = buf->f_bfree;
+  buf->f_blocks  = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
+  buf->f_bsize   = s->s_blocksize;
+  /* changed to accommodate gcc folks.*/
+  buf->f_type    =  REISERFS_SUPER_MAGIC;
+  return 0;
+}
+
+#ifdef CONFIG_QUOTA
+static int reiserfs_dquot_initialize(struct inode *inode, int type)
+{
+    struct reiserfs_transaction_handle th;
+    int ret;
+
+    /* We may create quota structure so we need to reserve enough blocks */
+    reiserfs_write_lock(inode->i_sb);
+    journal_begin(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS);
+    ret = dquot_initialize(inode, type);
+    journal_end(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS);
+    reiserfs_write_unlock(inode->i_sb);
+    return ret;
+}
+
+static int reiserfs_dquot_drop(struct inode *inode)
+{
+    struct reiserfs_transaction_handle th;
+    int ret;
+
+    /* We may delete quota structure so we need to reserve enough blocks */
+    reiserfs_write_lock(inode->i_sb);
+    journal_begin(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS);
+    ret = dquot_drop(inode);
+    journal_end(&th, inode->i_sb, 2*REISERFS_QUOTA_INIT_BLOCKS);
+    reiserfs_write_unlock(inode->i_sb);
+    return ret;
+}
+
+static int reiserfs_write_dquot(struct dquot *dquot)
+{
+    struct reiserfs_transaction_handle th;
+    int ret;
+
+    reiserfs_write_lock(dquot->dq_sb);
+    journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_TRANS_BLOCKS);
+    ret = dquot_commit(dquot);
+    journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_TRANS_BLOCKS);
+    reiserfs_write_unlock(dquot->dq_sb);
+    return ret;
+}
+
+static int reiserfs_acquire_dquot(struct dquot *dquot)
+{
+    struct reiserfs_transaction_handle th;
+    int ret;
+
+    reiserfs_write_lock(dquot->dq_sb);
+    journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS);
+    ret = dquot_acquire(dquot);
+    journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS);
+    reiserfs_write_unlock(dquot->dq_sb);
+    return ret;
+}
+
+static int reiserfs_release_dquot(struct dquot *dquot)
+{
+    struct reiserfs_transaction_handle th;
+    int ret;
+
+    reiserfs_write_lock(dquot->dq_sb);
+    journal_begin(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS);
+    ret = dquot_release(dquot);
+    journal_end(&th, dquot->dq_sb, REISERFS_QUOTA_INIT_BLOCKS);
+    reiserfs_write_unlock(dquot->dq_sb);
+    return ret;
+}
+
+static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
+{
+    /* Are we journalling quotas? */
+    if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
+        REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
+	dquot_mark_dquot_dirty(dquot);
+	return reiserfs_write_dquot(dquot);
+    }
+    else
+	return dquot_mark_dquot_dirty(dquot);
+}
+
+static int reiserfs_write_info(struct super_block *sb, int type)
+{
+    struct reiserfs_transaction_handle th;
+    int ret;
+
+    /* Data block + inode block */
+    reiserfs_write_lock(sb);
+    journal_begin(&th, sb, 2);
+    ret = dquot_commit_info(sb, type);
+    journal_end(&th, sb, 2);
+    reiserfs_write_unlock(sb);
+    return ret;
+}
+
+/*
+ * Turn on quotas during mount time - we need to find
+ * the quota file and such...
+ */
+static int reiserfs_quota_on_mount(struct super_block *sb, int type)
+{
+    int err;
+    struct dentry *dentry;
+    struct qstr name = { .name = REISERFS_SB(sb)->s_qf_names[type],
+                         .hash = 0,
+                         .len = strlen(REISERFS_SB(sb)->s_qf_names[type])};
+
+    dentry = lookup_hash(&name, sb->s_root);
+    if (IS_ERR(dentry))
+            return PTR_ERR(dentry);
+    err = vfs_quota_on_mount(type, REISERFS_SB(sb)->s_jquota_fmt, dentry);
+    /* Now invalidate and put the dentry - quota got its own reference
+     * to inode and dentry has at least wrong hash so we had better
+     * throw it away */
+    d_invalidate(dentry);
+    dput(dentry);
+    return err;
+}
+
+/*
+ * Standard function to be called on quota_on
+ */
+static int reiserfs_quota_on(struct super_block *sb, int type, int format_id, char *path)
+{
+    int err;
+    struct nameidata nd;
+
+    err = path_lookup(path, LOOKUP_FOLLOW, &nd);
+    if (err)
+        return err;
+    /* Quotafile not on the same filesystem? */
+    if (nd.mnt->mnt_sb != sb) {
+	path_release(&nd);
+        return -EXDEV;
+    }
+    /* We must not pack tails for quota files on reiserfs for quota IO to work */
+    if (!REISERFS_I(nd.dentry->d_inode)->i_flags & i_nopack_mask) {
+	reiserfs_warning(sb, "reiserfs: Quota file must have tail packing disabled.");
+	path_release(&nd);
+	return -EINVAL;
+    }
+    /* Not journalling quota? No more tests needed... */
+    if (!REISERFS_SB(sb)->s_qf_names[USRQUOTA] &&
+        !REISERFS_SB(sb)->s_qf_names[GRPQUOTA]) {
+	path_release(&nd);
+        return vfs_quota_on(sb, type, format_id, path);
+    }
+    /* Quotafile not of fs root? */
+    if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode)
+	reiserfs_warning(sb, "reiserfs: Quota file not on filesystem root. "
+                             "Journalled quota will not work.");
+    path_release(&nd);
+    return vfs_quota_on(sb, type, format_id, path);
+}
+
+/* Read data from quotafile - avoid pagecache and such because we cannot afford
+ * acquiring the locks... As quota files are never truncated and quota code
+ * itself serializes the operations (and noone else should touch the files)
+ * we don't have to be afraid of races */
+static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
+				   size_t len, loff_t off)
+{
+    struct inode *inode = sb_dqopt(sb)->files[type];
+    unsigned long blk = off >> sb->s_blocksize_bits;
+    int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
+    size_t toread;
+    struct buffer_head tmp_bh, *bh;
+    loff_t i_size = i_size_read(inode);
+
+    if (off > i_size)
+	return 0;
+    if (off+len > i_size)
+	len = i_size-off;
+    toread = len;
+    while (toread > 0) {
+	tocopy = sb->s_blocksize - offset < toread ? sb->s_blocksize - offset : toread;
+	tmp_bh.b_state = 0;
+	/* Quota files are without tails so we can safely use this function */
+	reiserfs_write_lock(sb);
+	err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
+	reiserfs_write_unlock(sb);
+	if (err)
+	    return err;
+	if (!buffer_mapped(&tmp_bh))    /* A hole? */
+	    memset(data, 0, tocopy);
+	else {
+	    bh = sb_bread(sb, tmp_bh.b_blocknr);
+	    if (!bh)
+		return -EIO;
+	    memcpy(data, bh->b_data+offset, tocopy);
+	    brelse(bh);
+	}
+	offset = 0;
+	toread -= tocopy;
+	data += tocopy;
+	blk++;
+    }
+    return len;
+}
+
+/* Write to quotafile (we know the transaction is already started and has
+ * enough credits) */
+static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
+				    const char *data, size_t len, loff_t off)
+{
+    struct inode *inode = sb_dqopt(sb)->files[type];
+    unsigned long blk = off >> sb->s_blocksize_bits;
+    int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
+    int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
+    size_t towrite = len;
+    struct buffer_head tmp_bh, *bh;
+
+    down(&inode->i_sem);
+    while (towrite > 0) {
+	tocopy = sb->s_blocksize - offset < towrite ?
+	         sb->s_blocksize - offset : towrite;
+	tmp_bh.b_state = 0;
+	err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
+	if (err)
+	    goto out;
+	if (offset || tocopy != sb->s_blocksize)
+	    bh = sb_bread(sb, tmp_bh.b_blocknr);
+	else
+	    bh = sb_getblk(sb, tmp_bh.b_blocknr);
+	if (!bh) {
+	    err = -EIO;
+	    goto out;
+	}
+	lock_buffer(bh);
+	memcpy(bh->b_data+offset, data, tocopy);
+	flush_dcache_page(bh->b_page);
+	set_buffer_uptodate(bh);
+	unlock_buffer(bh);
+	reiserfs_prepare_for_journal(sb, bh, 1);
+	journal_mark_dirty(current->journal_info, sb, bh);
+	if (!journal_quota)
+		reiserfs_add_ordered_list(inode, bh);
+	brelse(bh);
+	offset = 0;
+	towrite -= tocopy;
+	data += tocopy;
+	blk++;
+    }
+out:
+    if (len == towrite)
+	return err;
+    if (inode->i_size < off+len-towrite)
+	i_size_write(inode, off+len-towrite);
+    inode->i_version++;
+    inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+    mark_inode_dirty(inode);
+    up(&inode->i_sem);
+    return len - towrite;
+}
+
+#endif
+
+static struct super_block*
+get_super_block (struct file_system_type *fs_type, int flags,
+		 const char *dev_name, void *data)
+{
+	return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super);
+}
+
+static int __init
+init_reiserfs_fs ( void )
+{
+	int ret;
+
+	if ((ret = init_inodecache ())) {
+		return ret;
+	}
+
+        if ((ret = reiserfs_xattr_register_handlers ()))
+            goto failed_reiserfs_xattr_register_handlers;
+
+	reiserfs_proc_info_global_init ();
+	reiserfs_proc_register_global ("version", reiserfs_global_version_in_proc);
+
+        ret = register_filesystem (& reiserfs_fs_type);
+
+	if (ret == 0) {
+		return 0;
+	}
+
+        reiserfs_xattr_unregister_handlers ();
+
+failed_reiserfs_xattr_register_handlers:
+	reiserfs_proc_unregister_global ("version");
+	reiserfs_proc_info_global_done ();
+	destroy_inodecache ();
+
+	return ret;
+}
+
+static void __exit
+exit_reiserfs_fs ( void )
+{
+        reiserfs_xattr_unregister_handlers ();
+	reiserfs_proc_unregister_global ("version");
+	reiserfs_proc_info_global_done ();
+        unregister_filesystem (& reiserfs_fs_type);
+	destroy_inodecache ();
+}
+
+struct file_system_type reiserfs_fs_type = {
+	.owner		= THIS_MODULE,
+	.name		= "reiserfs",
+	.get_sb		= get_super_block,
+	.kill_sb	= kill_block_super,
+	.fs_flags	= FS_REQUIRES_DEV,
+};
+
+MODULE_DESCRIPTION ("ReiserFS journaled filesystem");
+MODULE_AUTHOR      ("Hans Reiser <reiser@namesys.com>");
+MODULE_LICENSE     ("GPL");
+
+module_init (init_reiserfs_fs);
+module_exit (exit_reiserfs_fs);