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, 2539 insertions, 0 deletions

diff --git a/fs/ext3/super.c b/fs/ext3/super.c
new file mode 100644
index 00000000000..545b440a2d2
--- /dev/null
+++ b/fs/ext3/super.c
@@ -0,0 +1,2539 @@
+/*
+ *  linux/fs/ext3/super.c
+ *
+ * Copyright (C) 1992, 1993, 1994, 1995
+ * Remy Card (card@masi.ibp.fr)
+ * Laboratoire MASI - Institut Blaise Pascal
+ * Universite Pierre et Marie Curie (Paris VI)
+ *
+ *  from
+ *
+ *  linux/fs/minix/inode.c
+ *
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ *
+ *  Big-endian to little-endian byte-swapping/bitmaps by
+ *        David S. Miller (davem@caip.rutgers.edu), 1995
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/fs.h>
+#include <linux/time.h>
+#include <linux/jbd.h>
+#include <linux/ext3_fs.h>
+#include <linux/ext3_jbd.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/parser.h>
+#include <linux/smp_lock.h>
+#include <linux/buffer_head.h>
+#include <linux/vfs.h>
+#include <linux/random.h>
+#include <linux/mount.h>
+#include <linux/namei.h>
+#include <linux/quotaops.h>
+#include <asm/uaccess.h>
+#include "xattr.h"
+#include "acl.h"
+
+static int ext3_load_journal(struct super_block *, struct ext3_super_block *);
+static int ext3_create_journal(struct super_block *, struct ext3_super_block *,
+			       int);
+static void ext3_commit_super (struct super_block * sb,
+			       struct ext3_super_block * es,
+			       int sync);
+static void ext3_mark_recovery_complete(struct super_block * sb,
+					struct ext3_super_block * es);
+static void ext3_clear_journal_err(struct super_block * sb,
+				   struct ext3_super_block * es);
+static int ext3_sync_fs(struct super_block *sb, int wait);
+static const char *ext3_decode_error(struct super_block * sb, int errno,
+				     char nbuf[16]);
+static int ext3_remount (struct super_block * sb, int * flags, char * data);
+static int ext3_statfs (struct super_block * sb, struct kstatfs * buf);
+static void ext3_unlockfs(struct super_block *sb);
+static void ext3_write_super (struct super_block * sb);
+static void ext3_write_super_lockfs(struct super_block *sb);
+
+/* 
+ * Wrappers for journal_start/end.
+ *
+ * The only special thing we need to do here is to make sure that all
+ * journal_end calls result in the superblock being marked dirty, so
+ * that sync() will call the filesystem's write_super callback if
+ * appropriate. 
+ */
+handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks)
+{
+	journal_t *journal;
+
+	if (sb->s_flags & MS_RDONLY)
+		return ERR_PTR(-EROFS);
+
+	/* Special case here: if the journal has aborted behind our
+	 * backs (eg. EIO in the commit thread), then we still need to
+	 * take the FS itself readonly cleanly. */
+	journal = EXT3_SB(sb)->s_journal;
+	if (is_journal_aborted(journal)) {
+		ext3_abort(sb, __FUNCTION__,
+			   "Detected aborted journal");
+		return ERR_PTR(-EROFS);
+	}
+
+	return journal_start(journal, nblocks);
+}
+
+/* 
+ * The only special thing we need to do here is to make sure that all
+ * journal_stop calls result in the superblock being marked dirty, so
+ * that sync() will call the filesystem's write_super callback if
+ * appropriate. 
+ */
+int __ext3_journal_stop(const char *where, handle_t *handle)
+{
+	struct super_block *sb;
+	int err;
+	int rc;
+
+	sb = handle->h_transaction->t_journal->j_private;
+	err = handle->h_err;
+	rc = journal_stop(handle);
+
+	if (!err)
+		err = rc;
+	if (err)
+		__ext3_std_error(sb, where, err);
+	return err;
+}
+
+void ext3_journal_abort_handle(const char *caller, const char *err_fn,
+		struct buffer_head *bh, handle_t *handle, int err)
+{
+	char nbuf[16];
+	const char *errstr = ext3_decode_error(NULL, err, nbuf);
+
+	if (bh)
+		BUFFER_TRACE(bh, "abort");
+
+	if (!handle->h_err)
+		handle->h_err = err;
+
+	if (is_handle_aborted(handle))
+		return;
+
+	printk(KERN_ERR "%s: aborting transaction: %s in %s\n",
+	       caller, errstr, err_fn);
+
+	journal_abort_handle(handle);
+}
+
+/* Deal with the reporting of failure conditions on a filesystem such as
+ * inconsistencies detected or read IO failures.
+ *
+ * On ext2, we can store the error state of the filesystem in the
+ * superblock.  That is not possible on ext3, because we may have other
+ * write ordering constraints on the superblock which prevent us from
+ * writing it out straight away; and given that the journal is about to
+ * be aborted, we can't rely on the current, or future, transactions to
+ * write out the superblock safely.
+ *
+ * We'll just use the journal_abort() error code to record an error in
+ * the journal instead.  On recovery, the journal will compain about
+ * that error until we've noted it down and cleared it.
+ */
+
+static void ext3_handle_error(struct super_block *sb)
+{
+	struct ext3_super_block *es = EXT3_SB(sb)->s_es;
+
+	EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
+	es->s_state |= cpu_to_le16(EXT3_ERROR_FS);
+
+	if (sb->s_flags & MS_RDONLY)
+		return;
+
+	if (test_opt (sb, ERRORS_RO)) {
+		printk (KERN_CRIT "Remounting filesystem read-only\n");
+		sb->s_flags |= MS_RDONLY;
+	} else {
+		journal_t *journal = EXT3_SB(sb)->s_journal;
+
+		EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT;
+		if (journal)
+			journal_abort(journal, -EIO);
+	}
+	if (test_opt(sb, ERRORS_PANIC))
+		panic("EXT3-fs (device %s): panic forced after error\n",
+			sb->s_id);
+	ext3_commit_super(sb, es, 1);
+}
+
+void ext3_error (struct super_block * sb, const char * function,
+		 const char * fmt, ...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+	printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function);
+	vprintk(fmt, args);
+	printk("\n");
+	va_end(args);
+
+	ext3_handle_error(sb);
+}
+
+static const char *ext3_decode_error(struct super_block * sb, int errno,
+				     char nbuf[16])
+{
+	char *errstr = NULL;
+
+	switch (errno) {
+	case -EIO:
+		errstr = "IO failure";
+		break;
+	case -ENOMEM:
+		errstr = "Out of memory";
+		break;
+	case -EROFS:
+		if (!sb || EXT3_SB(sb)->s_journal->j_flags & JFS_ABORT)
+			errstr = "Journal has aborted";
+		else
+			errstr = "Readonly filesystem";
+		break;
+	default:
+		/* If the caller passed in an extra buffer for unknown
+		 * errors, textualise them now.  Else we just return
+		 * NULL. */
+		if (nbuf) {
+			/* Check for truncated error codes... */
+			if (snprintf(nbuf, 16, "error %d", -errno) >= 0)
+				errstr = nbuf;
+		}
+		break;
+	}
+
+	return errstr;
+}
+
+/* __ext3_std_error decodes expected errors from journaling functions
+ * automatically and invokes the appropriate error response.  */
+
+void __ext3_std_error (struct super_block * sb, const char * function,
+		       int errno)
+{
+	char nbuf[16];
+	const char *errstr = ext3_decode_error(sb, errno, nbuf);
+
+	printk (KERN_CRIT "EXT3-fs error (device %s) in %s: %s\n",
+		sb->s_id, function, errstr);
+
+	ext3_handle_error(sb);
+}
+
+/*
+ * ext3_abort is a much stronger failure handler than ext3_error.  The
+ * abort function may be used to deal with unrecoverable failures such
+ * as journal IO errors or ENOMEM at a critical moment in log management.
+ *
+ * We unconditionally force the filesystem into an ABORT|READONLY state,
+ * unless the error response on the fs has been set to panic in which
+ * case we take the easy way out and panic immediately.
+ */
+
+void ext3_abort (struct super_block * sb, const char * function,
+		 const char * fmt, ...)
+{
+	va_list args;
+
+	printk (KERN_CRIT "ext3_abort called.\n");
+
+	va_start(args, fmt);
+	printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function);
+	vprintk(fmt, args);
+	printk("\n");
+	va_end(args);
+
+	if (test_opt(sb, ERRORS_PANIC))
+		panic("EXT3-fs panic from previous error\n");
+
+	if (sb->s_flags & MS_RDONLY)
+		return;
+
+	printk(KERN_CRIT "Remounting filesystem read-only\n");
+	EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
+	sb->s_flags |= MS_RDONLY;
+	EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT;
+	journal_abort(EXT3_SB(sb)->s_journal, -EIO);
+}
+
+void ext3_warning (struct super_block * sb, const char * function,
+		   const char * fmt, ...)
+{
+	va_list args;
+
+	va_start(args, fmt);
+	printk(KERN_WARNING "EXT3-fs warning (device %s): %s: ",
+	       sb->s_id, function);
+	vprintk(fmt, args);
+	printk("\n");
+	va_end(args);
+}
+
+void ext3_update_dynamic_rev(struct super_block *sb)
+{
+	struct ext3_super_block *es = EXT3_SB(sb)->s_es;
+
+	if (le32_to_cpu(es->s_rev_level) > EXT3_GOOD_OLD_REV)
+		return;
+
+	ext3_warning(sb, __FUNCTION__,
+		     "updating to rev %d because of new feature flag, "
+		     "running e2fsck is recommended",
+		     EXT3_DYNAMIC_REV);
+
+	es->s_first_ino = cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO);
+	es->s_inode_size = cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE);
+	es->s_rev_level = cpu_to_le32(EXT3_DYNAMIC_REV);
+	/* leave es->s_feature_*compat flags alone */
+	/* es->s_uuid will be set by e2fsck if empty */
+
+	/*
+	 * The rest of the superblock fields should be zero, and if not it
+	 * means they are likely already in use, so leave them alone.  We
+	 * can leave it up to e2fsck to clean up any inconsistencies there.
+	 */
+}
+
+/*
+ * Open the external journal device
+ */
+static struct block_device *ext3_blkdev_get(dev_t dev)
+{
+	struct block_device *bdev;
+	char b[BDEVNAME_SIZE];
+
+	bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE);
+	if (IS_ERR(bdev))
+		goto fail;
+	return bdev;
+
+fail:
+	printk(KERN_ERR "EXT3: failed to open journal device %s: %ld\n",
+			__bdevname(dev, b), PTR_ERR(bdev));
+	return NULL;
+}
+
+/*
+ * Release the journal device
+ */
+static int ext3_blkdev_put(struct block_device *bdev)
+{
+	bd_release(bdev);
+	return blkdev_put(bdev);
+}
+
+static int ext3_blkdev_remove(struct ext3_sb_info *sbi)
+{
+	struct block_device *bdev;
+	int ret = -ENODEV;
+
+	bdev = sbi->journal_bdev;
+	if (bdev) {
+		ret = ext3_blkdev_put(bdev);
+		sbi->journal_bdev = NULL;
+	}
+	return ret;
+}
+
+static inline struct inode *orphan_list_entry(struct list_head *l)
+{
+	return &list_entry(l, struct ext3_inode_info, i_orphan)->vfs_inode;
+}
+
+static void dump_orphan_list(struct super_block *sb, struct ext3_sb_info *sbi)
+{
+	struct list_head *l;
+
+	printk(KERN_ERR "sb orphan head is %d\n", 
+	       le32_to_cpu(sbi->s_es->s_last_orphan));
+
+	printk(KERN_ERR "sb_info orphan list:\n");
+	list_for_each(l, &sbi->s_orphan) {
+		struct inode *inode = orphan_list_entry(l);
+		printk(KERN_ERR "  "
+		       "inode %s:%ld at %p: mode %o, nlink %d, next %d\n",
+		       inode->i_sb->s_id, inode->i_ino, inode,
+		       inode->i_mode, inode->i_nlink, 
+		       NEXT_ORPHAN(inode));
+	}
+}
+
+static void ext3_put_super (struct super_block * sb)
+{
+	struct ext3_sb_info *sbi = EXT3_SB(sb);
+	struct ext3_super_block *es = sbi->s_es;
+	int i;
+
+	ext3_xattr_put_super(sb);
+	journal_destroy(sbi->s_journal);
+	if (!(sb->s_flags & MS_RDONLY)) {
+		EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
+		es->s_state = cpu_to_le16(sbi->s_mount_state);
+		BUFFER_TRACE(sbi->s_sbh, "marking dirty");
+		mark_buffer_dirty(sbi->s_sbh);
+		ext3_commit_super(sb, es, 1);
+	}
+
+	for (i = 0; i < sbi->s_gdb_count; i++)
+		brelse(sbi->s_group_desc[i]);
+	kfree(sbi->s_group_desc);
+	percpu_counter_destroy(&sbi->s_freeblocks_counter);
+	percpu_counter_destroy(&sbi->s_freeinodes_counter);
+	percpu_counter_destroy(&sbi->s_dirs_counter);
+	brelse(sbi->s_sbh);
+#ifdef CONFIG_QUOTA
+	for (i = 0; i < MAXQUOTAS; i++)
+		kfree(sbi->s_qf_names[i]);
+#endif
+
+	/* Debugging code just in case the in-memory inode orphan list
+	 * isn't empty.  The on-disk one can be non-empty if we've
+	 * detected an error and taken the fs readonly, but the
+	 * in-memory list had better be clean by this point. */
+	if (!list_empty(&sbi->s_orphan))
+		dump_orphan_list(sb, sbi);
+	J_ASSERT(list_empty(&sbi->s_orphan));
+
+	invalidate_bdev(sb->s_bdev, 0);
+	if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) {
+		/*
+		 * Invalidate the journal device's buffers.  We don't want them
+		 * floating about in memory - the physical journal device may
+		 * hotswapped, and it breaks the `ro-after' testing code.
+		 */
+		sync_blockdev(sbi->journal_bdev);
+		invalidate_bdev(sbi->journal_bdev, 0);
+		ext3_blkdev_remove(sbi);
+	}
+	sb->s_fs_info = NULL;
+	kfree(sbi);
+	return;
+}
+
+static kmem_cache_t *ext3_inode_cachep;
+
+/*
+ * Called inside transaction, so use GFP_NOFS
+ */
+static struct inode *ext3_alloc_inode(struct super_block *sb)
+{
+	struct ext3_inode_info *ei;
+
+	ei = kmem_cache_alloc(ext3_inode_cachep, SLAB_NOFS);
+	if (!ei)
+		return NULL;
+#ifdef CONFIG_EXT3_FS_POSIX_ACL
+	ei->i_acl = EXT3_ACL_NOT_CACHED;
+	ei->i_default_acl = EXT3_ACL_NOT_CACHED;
+#endif
+	ei->i_block_alloc_info = NULL;
+	ei->vfs_inode.i_version = 1;
+	return &ei->vfs_inode;
+}
+
+static void ext3_destroy_inode(struct inode *inode)
+{
+	kmem_cache_free(ext3_inode_cachep, EXT3_I(inode));
+}
+
+static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
+{
+	struct ext3_inode_info *ei = (struct ext3_inode_info *) foo;
+
+	if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
+	    SLAB_CTOR_CONSTRUCTOR) {
+		INIT_LIST_HEAD(&ei->i_orphan);
+#ifdef CONFIG_EXT3_FS_XATTR
+		init_rwsem(&ei->xattr_sem);
+#endif
+		init_MUTEX(&ei->truncate_sem);
+		inode_init_once(&ei->vfs_inode);
+	}
+}
+ 
+static int init_inodecache(void)
+{
+	ext3_inode_cachep = kmem_cache_create("ext3_inode_cache",
+					     sizeof(struct ext3_inode_info),
+					     0, SLAB_RECLAIM_ACCOUNT,
+					     init_once, NULL);
+	if (ext3_inode_cachep == NULL)
+		return -ENOMEM;
+	return 0;
+}
+
+static void destroy_inodecache(void)
+{
+	if (kmem_cache_destroy(ext3_inode_cachep))
+		printk(KERN_INFO "ext3_inode_cache: not all structures were freed\n");
+}
+
+static void ext3_clear_inode(struct inode *inode)
+{
+	struct ext3_block_alloc_info *rsv = EXT3_I(inode)->i_block_alloc_info;
+#ifdef CONFIG_EXT3_FS_POSIX_ACL
+       if (EXT3_I(inode)->i_acl &&
+           EXT3_I(inode)->i_acl != EXT3_ACL_NOT_CACHED) {
+               posix_acl_release(EXT3_I(inode)->i_acl);
+               EXT3_I(inode)->i_acl = EXT3_ACL_NOT_CACHED;
+       }
+       if (EXT3_I(inode)->i_default_acl &&
+           EXT3_I(inode)->i_default_acl != EXT3_ACL_NOT_CACHED) {
+               posix_acl_release(EXT3_I(inode)->i_default_acl);
+               EXT3_I(inode)->i_default_acl = EXT3_ACL_NOT_CACHED;
+       }
+#endif
+	ext3_discard_reservation(inode);
+	EXT3_I(inode)->i_block_alloc_info = NULL;
+	kfree(rsv);
+}
+
+#ifdef CONFIG_QUOTA
+
+#define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
+#define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
+
+static int ext3_dquot_initialize(struct inode *inode, int type);
+static int ext3_dquot_drop(struct inode *inode);
+static int ext3_write_dquot(struct dquot *dquot);
+static int ext3_acquire_dquot(struct dquot *dquot);
+static int ext3_release_dquot(struct dquot *dquot);
+static int ext3_mark_dquot_dirty(struct dquot *dquot);
+static int ext3_write_info(struct super_block *sb, int type);
+static int ext3_quota_on(struct super_block *sb, int type, int format_id, char *path);
+static int ext3_quota_on_mount(struct super_block *sb, int type);
+static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data,
+			       size_t len, loff_t off);
+static ssize_t ext3_quota_write(struct super_block *sb, int type,
+				const char *data, size_t len, loff_t off);
+
+static struct dquot_operations ext3_quota_operations = {
+	.initialize	= ext3_dquot_initialize,
+	.drop		= ext3_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	= ext3_write_dquot,
+	.acquire_dquot	= ext3_acquire_dquot,
+	.release_dquot	= ext3_release_dquot,
+	.mark_dirty	= ext3_mark_dquot_dirty,
+	.write_info	= ext3_write_info
+};
+
+static struct quotactl_ops ext3_qctl_operations = {
+	.quota_on	= ext3_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 super_operations ext3_sops = {
+	.alloc_inode	= ext3_alloc_inode,
+	.destroy_inode	= ext3_destroy_inode,
+	.read_inode	= ext3_read_inode,
+	.write_inode	= ext3_write_inode,
+	.dirty_inode	= ext3_dirty_inode,
+	.delete_inode	= ext3_delete_inode,
+	.put_super	= ext3_put_super,
+	.write_super	= ext3_write_super,
+	.sync_fs	= ext3_sync_fs,
+	.write_super_lockfs = ext3_write_super_lockfs,
+	.unlockfs	= ext3_unlockfs,
+	.statfs		= ext3_statfs,
+	.remount_fs	= ext3_remount,
+	.clear_inode	= ext3_clear_inode,
+#ifdef CONFIG_QUOTA
+	.quota_read	= ext3_quota_read,
+	.quota_write	= ext3_quota_write,
+#endif
+};
+
+struct dentry *ext3_get_parent(struct dentry *child);
+static struct export_operations ext3_export_ops = {
+	.get_parent = ext3_get_parent,
+};
+
+enum {
+	Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid,
+	Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro,
+	Opt_nouid32, Opt_check, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov,
+	Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl,
+	Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh,
+	Opt_commit, Opt_journal_update, Opt_journal_inum,
+	Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback,
+	Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
+	Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0,
+	Opt_ignore, Opt_barrier, Opt_err, Opt_resize,
+};
+
+static match_table_t tokens = {
+	{Opt_bsd_df, "bsddf"},
+	{Opt_minix_df, "minixdf"},
+	{Opt_grpid, "grpid"},
+	{Opt_grpid, "bsdgroups"},
+	{Opt_nogrpid, "nogrpid"},
+	{Opt_nogrpid, "sysvgroups"},
+	{Opt_resgid, "resgid=%u"},
+	{Opt_resuid, "resuid=%u"},
+	{Opt_sb, "sb=%u"},
+	{Opt_err_cont, "errors=continue"},
+	{Opt_err_panic, "errors=panic"},
+	{Opt_err_ro, "errors=remount-ro"},
+	{Opt_nouid32, "nouid32"},
+	{Opt_nocheck, "nocheck"},
+	{Opt_nocheck, "check=none"},
+	{Opt_check, "check"},
+	{Opt_debug, "debug"},
+	{Opt_oldalloc, "oldalloc"},
+	{Opt_orlov, "orlov"},
+	{Opt_user_xattr, "user_xattr"},
+	{Opt_nouser_xattr, "nouser_xattr"},
+	{Opt_acl, "acl"},
+	{Opt_noacl, "noacl"},
+	{Opt_reservation, "reservation"},
+	{Opt_noreservation, "noreservation"},
+	{Opt_noload, "noload"},
+	{Opt_nobh, "nobh"},
+	{Opt_commit, "commit=%u"},
+	{Opt_journal_update, "journal=update"},
+	{Opt_journal_inum, "journal=%u"},
+	{Opt_abort, "abort"},
+	{Opt_data_journal, "data=journal"},
+	{Opt_data_ordered, "data=ordered"},
+	{Opt_data_writeback, "data=writeback"},
+	{Opt_offusrjquota, "usrjquota="},
+	{Opt_usrjquota, "usrjquota=%s"},
+	{Opt_offgrpjquota, "grpjquota="},
+	{Opt_grpjquota, "grpjquota=%s"},
+	{Opt_jqfmt_vfsold, "jqfmt=vfsold"},
+	{Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
+	{Opt_ignore, "grpquota"},
+	{Opt_ignore, "noquota"},
+	{Opt_ignore, "quota"},
+	{Opt_ignore, "usrquota"},
+	{Opt_barrier, "barrier=%u"},
+	{Opt_err, NULL},
+	{Opt_resize, "resize"},
+};
+
+static unsigned long get_sb_block(void **data)
+{
+	unsigned long 	sb_block;
+	char 		*options = (char *) *data;
+
+	if (!options || strncmp(options, "sb=", 3) != 0)
+		return 1;	/* Default location */
+	options += 3;
+	sb_block = simple_strtoul(options, &options, 0);
+	if (*options && *options != ',') {
+		printk("EXT3-fs: Invalid sb specification: %s\n",
+		       (char *) *data);
+		return 1;
+	}
+	if (*options == ',')
+		options++;
+	*data = (void *) options;
+	return sb_block;
+}
+
+static int parse_options (char * options, struct super_block *sb,
+			  unsigned long * inum, unsigned long *n_blocks_count, int is_remount)
+{
+	struct ext3_sb_info *sbi = EXT3_SB(sb);
+	char * p;
+	substring_t args[MAX_OPT_ARGS];
+	int data_opt = 0;
+	int option;
+#ifdef CONFIG_QUOTA
+	int qtype;
+	char *qname;
+#endif
+
+	if (!options)
+		return 1;
+
+	while ((p = strsep (&options, ",")) != NULL) {
+		int token;
+		if (!*p)
+			continue;
+
+		token = match_token(p, tokens, args);
+		switch (token) {
+		case Opt_bsd_df:
+			clear_opt (sbi->s_mount_opt, MINIX_DF);
+			break;
+		case Opt_minix_df:
+			set_opt (sbi->s_mount_opt, MINIX_DF);
+			break;
+		case Opt_grpid:
+			set_opt (sbi->s_mount_opt, GRPID);
+			break;
+		case Opt_nogrpid:
+			clear_opt (sbi->s_mount_opt, GRPID);
+			break;
+		case Opt_resuid:
+			if (match_int(&args[0], &option))
+				return 0;
+			sbi->s_resuid = option;
+			break;
+		case Opt_resgid:
+			if (match_int(&args[0], &option))
+				return 0;
+			sbi->s_resgid = option;
+			break;
+		case Opt_sb:
+			/* handled by get_sb_block() instead of here */
+			/* *sb_block = match_int(&args[0]); */
+			break;
+		case Opt_err_panic:
+			clear_opt (sbi->s_mount_opt, ERRORS_CONT);
+			clear_opt (sbi->s_mount_opt, ERRORS_RO);
+			set_opt (sbi->s_mount_opt, ERRORS_PANIC);
+			break;
+		case Opt_err_ro:
+			clear_opt (sbi->s_mount_opt, ERRORS_CONT);
+			clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
+			set_opt (sbi->s_mount_opt, ERRORS_RO);
+			break;
+		case Opt_err_cont:
+			clear_opt (sbi->s_mount_opt, ERRORS_RO);
+			clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
+			set_opt (sbi->s_mount_opt, ERRORS_CONT);
+			break;
+		case Opt_nouid32:
+			set_opt (sbi->s_mount_opt, NO_UID32);
+			break;
+		case Opt_check:
+#ifdef CONFIG_EXT3_CHECK
+			set_opt (sbi->s_mount_opt, CHECK);
+#else
+			printk(KERN_ERR
+			       "EXT3 Check option not supported\n");
+#endif
+			break;
+		case Opt_nocheck:
+			clear_opt (sbi->s_mount_opt, CHECK);
+			break;
+		case Opt_debug:
+			set_opt (sbi->s_mount_opt, DEBUG);
+			break;
+		case Opt_oldalloc:
+			set_opt (sbi->s_mount_opt, OLDALLOC);
+			break;
+		case Opt_orlov:
+			clear_opt (sbi->s_mount_opt, OLDALLOC);
+			break;
+#ifdef CONFIG_EXT3_FS_XATTR
+		case Opt_user_xattr:
+			set_opt (sbi->s_mount_opt, XATTR_USER);
+			break;
+		case Opt_nouser_xattr:
+			clear_opt (sbi->s_mount_opt, XATTR_USER);
+			break;
+#else
+		case Opt_user_xattr:
+		case Opt_nouser_xattr:
+			printk("EXT3 (no)user_xattr options not supported\n");
+			break;
+#endif
+#ifdef CONFIG_EXT3_FS_POSIX_ACL
+		case Opt_acl:
+			set_opt(sbi->s_mount_opt, POSIX_ACL);
+			break;
+		case Opt_noacl:
+			clear_opt(sbi->s_mount_opt, POSIX_ACL);
+			break;
+#else
+		case Opt_acl:
+		case Opt_noacl:
+			printk("EXT3 (no)acl options not supported\n");
+			break;
+#endif
+		case Opt_reservation:
+			set_opt(sbi->s_mount_opt, RESERVATION);
+			break;
+		case Opt_noreservation:
+			clear_opt(sbi->s_mount_opt, RESERVATION);
+			break;
+		case Opt_journal_update:
+			/* @@@ FIXME */
+			/* Eventually we will want to be able to create
+			   a journal file here.  For now, only allow the
+			   user to specify an existing inode to be the
+			   journal file. */
+			if (is_remount) {
+				printk(KERN_ERR "EXT3-fs: cannot specify "
+				       "journal on remount\n");
+				return 0;
+			}
+			set_opt (sbi->s_mount_opt, UPDATE_JOURNAL);
+			break;
+		case Opt_journal_inum:
+			if (is_remount) {
+				printk(KERN_ERR "EXT3-fs: cannot specify "
+				       "journal on remount\n");
+				return 0;
+			}
+			if (match_int(&args[0], &option))
+				return 0;
+			*inum = option;
+			break;
+		case Opt_noload:
+			set_opt (sbi->s_mount_opt, NOLOAD);
+			break;
+		case Opt_commit:
+			if (match_int(&args[0], &option))
+				return 0;
+			if (option < 0)
+				return 0;
+			if (option == 0)
+				option = JBD_DEFAULT_MAX_COMMIT_AGE;
+			sbi->s_commit_interval = HZ * option;
+			break;
+		case Opt_data_journal:
+			data_opt = EXT3_MOUNT_JOURNAL_DATA;
+			goto datacheck;
+		case Opt_data_ordered:
+			data_opt = EXT3_MOUNT_ORDERED_DATA;
+			goto datacheck;
+		case Opt_data_writeback:
+			data_opt = EXT3_MOUNT_WRITEBACK_DATA;
+		datacheck:
+			if (is_remount) {
+				if ((sbi->s_mount_opt & EXT3_MOUNT_DATA_FLAGS)
+						!= data_opt) {
+					printk(KERN_ERR
+						"EXT3-fs: cannot change data "
+						"mode on remount\n");
+					return 0;
+				}
+			} else {
+				sbi->s_mount_opt &= ~EXT3_MOUNT_DATA_FLAGS;
+				sbi->s_mount_opt |= data_opt;
+			}
+			break;
+#ifdef CONFIG_QUOTA
+		case Opt_usrjquota:
+			qtype = USRQUOTA;
+			goto set_qf_name;
+		case Opt_grpjquota:
+			qtype = GRPQUOTA;
+set_qf_name:
+			if (sb_any_quota_enabled(sb)) {
+				printk(KERN_ERR
+					"EXT3-fs: Cannot change journalled "
+					"quota options when quota turned on.\n");
+				return 0;
+			}
+			qname = match_strdup(&args[0]);
+			if (!qname) {
+				printk(KERN_ERR
+					"EXT3-fs: not enough memory for "
+					"storing quotafile name.\n");
+				return 0;
+			}
+			if (sbi->s_qf_names[qtype] &&
+			    strcmp(sbi->s_qf_names[qtype], qname)) {
+				printk(KERN_ERR
+					"EXT3-fs: %s quota file already "
+					"specified.\n", QTYPE2NAME(qtype));
+				kfree(qname);
+				return 0;
+			}
+			sbi->s_qf_names[qtype] = qname;
+			if (strchr(sbi->s_qf_names[qtype], '/')) {
+				printk(KERN_ERR
+					"EXT3-fs: quotafile must be on "
+					"filesystem root.\n");
+				kfree(sbi->s_qf_names[qtype]);
+				sbi->s_qf_names[qtype] = NULL;
+				return 0;
+			}
+			break;
+		case Opt_offusrjquota:
+			qtype = USRQUOTA;
+			goto clear_qf_name;
+		case Opt_offgrpjquota:
+			qtype = GRPQUOTA;
+clear_qf_name:
+			if (sb_any_quota_enabled(sb)) {
+				printk(KERN_ERR "EXT3-fs: Cannot change "
+					"journalled quota options when "
+					"quota turned on.\n");
+				return 0;
+			}
+			kfree(sbi->s_qf_names[qtype]);
+			sbi->s_qf_names[qtype] = NULL;
+			break;
+		case Opt_jqfmt_vfsold:
+			sbi->s_jquota_fmt = QFMT_VFS_OLD;
+			break;
+		case Opt_jqfmt_vfsv0:
+			sbi->s_jquota_fmt = QFMT_VFS_V0;
+			break;
+#else
+		case Opt_usrjquota:
+		case Opt_grpjquota:
+		case Opt_offusrjquota:
+		case Opt_offgrpjquota:
+		case Opt_jqfmt_vfsold:
+		case Opt_jqfmt_vfsv0:
+			printk(KERN_ERR
+				"EXT3-fs: journalled quota options not "
+				"supported.\n");
+			break;
+#endif
+		case Opt_abort:
+			set_opt(sbi->s_mount_opt, ABORT);
+			break;
+		case Opt_barrier:
+			if (match_int(&args[0], &option))
+				return 0;
+			if (option)
+				set_opt(sbi->s_mount_opt, BARRIER);
+			else
+				clear_opt(sbi->s_mount_opt, BARRIER);
+			break;
+		case Opt_ignore:
+			break;
+		case Opt_resize:
+			if (!n_blocks_count) {
+				printk("EXT3-fs: resize option only available "
+					"for remount\n");
+				return 0;
+			}
+			match_int(&args[0], &option);
+			*n_blocks_count = option;
+			break;
+		case Opt_nobh:
+			set_opt(sbi->s_mount_opt, NOBH);
+			break;
+		default:
+			printk (KERN_ERR
+				"EXT3-fs: Unrecognized mount option \"%s\" "
+				"or missing value\n", p);
+			return 0;
+		}
+	}
+#ifdef CONFIG_QUOTA
+	if (!sbi->s_jquota_fmt && (sbi->s_qf_names[USRQUOTA] ||
+	    sbi->s_qf_names[GRPQUOTA])) {
+		printk(KERN_ERR
+			"EXT3-fs: journalled quota format not specified.\n");
+		return 0;
+	}
+#endif
+
+	return 1;
+}
+
+static int ext3_setup_super(struct super_block *sb, struct ext3_super_block *es,
+			    int read_only)
+{
+	struct ext3_sb_info *sbi = EXT3_SB(sb);
+	int res = 0;
+
+	if (le32_to_cpu(es->s_rev_level) > EXT3_MAX_SUPP_REV) {
+		printk (KERN_ERR "EXT3-fs warning: revision level too high, "
+			"forcing read-only mode\n");
+		res = MS_RDONLY;
+	}
+	if (read_only)
+		return res;
+	if (!(sbi->s_mount_state & EXT3_VALID_FS))
+		printk (KERN_WARNING "EXT3-fs warning: mounting unchecked fs, "
+			"running e2fsck is recommended\n");
+	else if ((sbi->s_mount_state & EXT3_ERROR_FS))
+		printk (KERN_WARNING
+			"EXT3-fs warning: mounting fs with errors, "
+			"running e2fsck is recommended\n");
+	else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 &&
+		 le16_to_cpu(es->s_mnt_count) >=
+		 (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count))
+		printk (KERN_WARNING
+			"EXT3-fs warning: maximal mount count reached, "
+			"running e2fsck is recommended\n");
+	else if (le32_to_cpu(es->s_checkinterval) &&
+		(le32_to_cpu(es->s_lastcheck) +
+			le32_to_cpu(es->s_checkinterval) <= get_seconds()))
+		printk (KERN_WARNING
+			"EXT3-fs warning: checktime reached, "
+			"running e2fsck is recommended\n");
+#if 0
+		/* @@@ We _will_ want to clear the valid bit if we find
+                   inconsistencies, to force a fsck at reboot.  But for
+                   a plain journaled filesystem we can keep it set as
+                   valid forever! :) */
+	es->s_state = cpu_to_le16(le16_to_cpu(es->s_state) & ~EXT3_VALID_FS);
+#endif
+	if (!(__s16) le16_to_cpu(es->s_max_mnt_count))
+		es->s_max_mnt_count = cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT);
+	es->s_mnt_count=cpu_to_le16(le16_to_cpu(es->s_mnt_count) + 1);
+	es->s_mtime = cpu_to_le32(get_seconds());
+	ext3_update_dynamic_rev(sb);
+	EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
+
+	ext3_commit_super(sb, es, 1);
+	if (test_opt(sb, DEBUG))
+		printk(KERN_INFO "[EXT3 FS bs=%lu, gc=%lu, "
+				"bpg=%lu, ipg=%lu, mo=%04lx]\n",
+			sb->s_blocksize,
+			sbi->s_groups_count,
+			EXT3_BLOCKS_PER_GROUP(sb),
+			EXT3_INODES_PER_GROUP(sb),
+			sbi->s_mount_opt);
+
+	printk(KERN_INFO "EXT3 FS on %s, ", sb->s_id);
+	if (EXT3_SB(sb)->s_journal->j_inode == NULL) {
+		char b[BDEVNAME_SIZE];
+
+		printk("external journal on %s\n",
+			bdevname(EXT3_SB(sb)->s_journal->j_dev, b));
+	} else {
+		printk("internal journal\n");
+	}
+#ifdef CONFIG_EXT3_CHECK
+	if (test_opt (sb, CHECK)) {
+		ext3_check_blocks_bitmap (sb);
+		ext3_check_inodes_bitmap (sb);
+	}
+#endif
+	return res;
+}
+
+/* Called at mount-time, super-block is locked */
+static int ext3_check_descriptors (struct super_block * sb)
+{
+	struct ext3_sb_info *sbi = EXT3_SB(sb);
+	unsigned long block = le32_to_cpu(sbi->s_es->s_first_data_block);
+	struct ext3_group_desc * gdp = NULL;
+	int desc_block = 0;
+	int i;
+
+	ext3_debug ("Checking group descriptors");
+
+	for (i = 0; i < sbi->s_groups_count; i++)
+	{
+		if ((i % EXT3_DESC_PER_BLOCK(sb)) == 0)
+			gdp = (struct ext3_group_desc *)
+					sbi->s_group_desc[desc_block++]->b_data;
+		if (le32_to_cpu(gdp->bg_block_bitmap) < block ||
+		    le32_to_cpu(gdp->bg_block_bitmap) >=
+				block + EXT3_BLOCKS_PER_GROUP(sb))
+		{
+			ext3_error (sb, "ext3_check_descriptors",
+				    "Block bitmap for group %d"
+				    " not in group (block %lu)!",
+				    i, (unsigned long)
+					le32_to_cpu(gdp->bg_block_bitmap));
+			return 0;
+		}
+		if (le32_to_cpu(gdp->bg_inode_bitmap) < block ||
+		    le32_to_cpu(gdp->bg_inode_bitmap) >=
+				block + EXT3_BLOCKS_PER_GROUP(sb))
+		{
+			ext3_error (sb, "ext3_check_descriptors",
+				    "Inode bitmap for group %d"
+				    " not in group (block %lu)!",
+				    i, (unsigned long)
+					le32_to_cpu(gdp->bg_inode_bitmap));
+			return 0;
+		}
+		if (le32_to_cpu(gdp->bg_inode_table) < block ||
+		    le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group >=
+		    block + EXT3_BLOCKS_PER_GROUP(sb))
+		{
+			ext3_error (sb, "ext3_check_descriptors",
+				    "Inode table for group %d"
+				    " not in group (block %lu)!",
+				    i, (unsigned long)
+					le32_to_cpu(gdp->bg_inode_table));
+			return 0;
+		}
+		block += EXT3_BLOCKS_PER_GROUP(sb);
+		gdp++;
+	}
+
+	sbi->s_es->s_free_blocks_count=cpu_to_le32(ext3_count_free_blocks(sb));
+	sbi->s_es->s_free_inodes_count=cpu_to_le32(ext3_count_free_inodes(sb));
+	return 1;
+}
+
+
+/* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at
+ * the superblock) which were deleted from all directories, but held open by
+ * a process at the time of a crash.  We walk the list and try to delete these
+ * inodes at recovery time (only with a read-write filesystem).
+ *
+ * In order to keep the orphan inode chain consistent during traversal (in
+ * case of crash during recovery), we link each inode into the superblock
+ * orphan list_head and handle it the same way as an inode deletion during
+ * normal operation (which journals the operations for us).
+ *
+ * We only do an iget() and an iput() on each inode, which is very safe if we
+ * accidentally point at an in-use or already deleted inode.  The worst that
+ * can happen in this case is that we get a "bit already cleared" message from
+ * ext3_free_inode().  The only reason we would point at a wrong inode is if
+ * e2fsck was run on this filesystem, and it must have already done the orphan
+ * inode cleanup for us, so we can safely abort without any further action.
+ */
+static void ext3_orphan_cleanup (struct super_block * sb,
+				 struct ext3_super_block * es)
+{
+	unsigned int s_flags = sb->s_flags;
+	int nr_orphans = 0, nr_truncates = 0;
+#ifdef CONFIG_QUOTA
+	int i;
+#endif
+	if (!es->s_last_orphan) {
+		jbd_debug(4, "no orphan inodes to clean up\n");
+		return;
+	}
+
+	if (EXT3_SB(sb)->s_mount_state & EXT3_ERROR_FS) {
+		if (es->s_last_orphan)
+			jbd_debug(1, "Errors on filesystem, "
+				  "clearing orphan list.\n");
+		es->s_last_orphan = 0;
+		jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
+		return;
+	}
+
+	if (s_flags & MS_RDONLY) {
+		printk(KERN_INFO "EXT3-fs: %s: orphan cleanup on readonly fs\n",
+		       sb->s_id);
+		sb->s_flags &= ~MS_RDONLY;
+	}
+#ifdef CONFIG_QUOTA
+	/* Needed for iput() to work correctly and not trash data */