On Wed, Dec 26, 2007 at 04:31:01PM +0100, Christoph Hellwig wrote:
> Use the proper helper to open a blockdevice by name for filesystem
> use, this makes sure it's properly claimed (also added for open-by-number)
> and gets rid of the struct file abuse.
>
> Tested by mounting a reiserfs filesystem with external journal.
Folks, what do we do with this patch? It's been out for more than a
month but didn't actually get picked up in any tree. I'd really like
to see this going in soon.
> Signed-off-by: Christoph Hellwig <[EMAIL PROTECTED]>
>
> Index: linux-2.6-xfs/fs/reiserfs/journal.c
> ===================================================================
> --- linux-2.6-xfs.orig/fs/reiserfs/journal.c 2007-12-13 18:55:40.000000000
> +0100
> +++ linux-2.6-xfs/fs/reiserfs/journal.c 2007-12-26 15:13:22.000000000
> +0100
> @@ -2574,11 +2574,9 @@ static int release_journal_dev(struct su
>
> result = 0;
>
> - if (journal->j_dev_file != NULL) {
> - result = filp_close(journal->j_dev_file, NULL);
> - journal->j_dev_file = NULL;
> - journal->j_dev_bd = NULL;
> - } else if (journal->j_dev_bd != NULL) {
> + if (journal->j_dev_bd != NULL) {
> + if (journal->j_dev_bd->bd_dev != super->s_dev)
> + bd_release(journal->j_dev_bd);
> result = blkdev_put(journal->j_dev_bd);
> journal->j_dev_bd = NULL;
> }
> @@ -2603,7 +2601,6 @@ static int journal_init_dev(struct super
> result = 0;
>
> journal->j_dev_bd = NULL;
> - journal->j_dev_file = NULL;
> jdev = SB_ONDISK_JOURNAL_DEVICE(super) ?
> new_decode_dev(SB_ONDISK_JOURNAL_DEVICE(super)) : super->s_dev;
>
> @@ -2620,35 +2617,34 @@ static int journal_init_dev(struct super
> "cannot init journal device '%s': %i",
> __bdevname(jdev, b), result);
> return result;
> - } else if (jdev != super->s_dev)
> + } else if (jdev != super->s_dev) {
> + result = bd_claim(journal->j_dev_bd, journal);
> + if (result) {
> + blkdev_put(journal->j_dev_bd);
> + return result;
> + }
> +
> set_blocksize(journal->j_dev_bd, super->s_blocksize);
> + }
> +
> return 0;
> }
>
> - journal->j_dev_file = filp_open(jdev_name, 0, 0);
> - if (!IS_ERR(journal->j_dev_file)) {
> - struct inode *jdev_inode = journal->j_dev_file->f_mapping->host;
> - if (!S_ISBLK(jdev_inode->i_mode)) {
> - reiserfs_warning(super, "journal_init_dev: '%s' is "
> - "not a block device", jdev_name);
> - result = -ENOTBLK;
> - release_journal_dev(super, journal);
> - } else {
> - /* ok */
> - journal->j_dev_bd = I_BDEV(jdev_inode);
> - set_blocksize(journal->j_dev_bd, super->s_blocksize);
> - reiserfs_info(super,
> - "journal_init_dev: journal device: %s\n",
> - bdevname(journal->j_dev_bd, b));
> - }
> - } else {
> - result = PTR_ERR(journal->j_dev_file);
> - journal->j_dev_file = NULL;
> + journal->j_dev_bd = open_bdev_excl(jdev_name, 0, journal);
> + if (IS_ERR(journal->j_dev_bd)) {
> + result = PTR_ERR(journal->j_dev_bd);
> + journal->j_dev_bd = NULL;
> reiserfs_warning(super,
> "journal_init_dev: Cannot open '%s': %i",
> jdev_name, result);
> + return result;
> }
> - return result;
> +
> + set_blocksize(journal->j_dev_bd, super->s_blocksize);
> + reiserfs_info(super,
> + "journal_init_dev: journal device: %s\n",
> + bdevname(journal->j_dev_bd, b));
> + return 0;
> }
>
> /**
> Index: linux-2.6-xfs/include/linux/reiserfs_fs_sb.h
> ===================================================================
> --- linux-2.6-xfs.orig/include/linux/reiserfs_fs_sb.h 2007-12-13
> 19:06:58.000000000 +0100
> +++ linux-2.6-xfs/include/linux/reiserfs_fs_sb.h 2007-12-26
> 15:13:22.000000000 +0100
> @@ -177,7 +177,6 @@ struct reiserfs_journal {
> struct reiserfs_journal_cnode *j_last; /* newest journal block */
> struct reiserfs_journal_cnode *j_first; /* oldest journal block.
> start here for traverse */
>
> - struct file *j_dev_file;
> struct block_device *j_dev_bd;
> int j_1st_reserved_block; /* first block on s_dev of reserved
> area journal */
>
---end quoted text---
-
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