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Date: Sun, 4 Jan 2009 15:32:45 -0500
From: Theodore Ts'o <tytso@....edu>
To: Ext4 Developers List <linux-ext4@...r.kernel.org>
Cc: Theodore Ts'o <tytso@....edu>
Subject: [PATCH] ext4: Remove code to create the journal inode
This code has been obsolete in quite some time, since the supported
method for adding a journal inode is to use tune2fs (or to creating
new filesystem with a journal via mke2fs or mkfs.ext4).
Signed-off-by: "Theodore Ts'o" <tytso@....edu>
---
Documentation/filesystems/ext4.txt | 4 --
fs/ext4/super.c | 68 ++--------------------------------
fs/jbd2/journal.c | 72 ------------------------------------
include/linux/jbd2.h | 1 -
4 files changed, 4 insertions(+), 141 deletions(-)
diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt
index 8066e6e..3024f74 100644
--- a/Documentation/filesystems/ext4.txt
+++ b/Documentation/filesystems/ext4.txt
@@ -143,10 +143,6 @@ journal_async_commit Commit block can be written to disk without waiting
journal=update Update the ext4 file system's journal to the current
format.
-journal=inum When a journal already exists, this option is ignored.
- Otherwise, it specifies the number of the inode which
- will represent the ext4 file system's journal file.
-
journal_dev=devnum When the external journal device's major/minor numbers
have changed, this option allows the user to specify
the new journal location. The journal device is
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 356ad34..70c27ad 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -51,8 +51,6 @@ struct proc_dir_entry *ext4_proc_root;
static int ext4_load_journal(struct super_block *, struct ext4_super_block *,
unsigned long journal_devnum);
-static int ext4_create_journal(struct super_block *, struct ext4_super_block *,
- unsigned int);
static void ext4_commit_super(struct super_block *sb,
struct ext4_super_block *es, int sync);
static void ext4_mark_recovery_complete(struct super_block *sb,
@@ -1006,7 +1004,7 @@ enum {
Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl,
Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh,
Opt_commit, Opt_min_batch_time, Opt_max_batch_time,
- Opt_journal_update, Opt_journal_inum, Opt_journal_dev,
+ Opt_journal_update, Opt_journal_dev,
Opt_journal_checksum, Opt_journal_async_commit,
Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback,
Opt_data_err_abort, Opt_data_err_ignore,
@@ -1048,7 +1046,6 @@ static const match_table_t tokens = {
{Opt_min_batch_time, "min_batch_time=%u"},
{Opt_max_batch_time, "max_batch_time=%u"},
{Opt_journal_update, "journal=update"},
- {Opt_journal_inum, "journal=%u"},
{Opt_journal_dev, "journal_dev=%u"},
{Opt_journal_checksum, "journal_checksum"},
{Opt_journal_async_commit, "journal_async_commit"},
@@ -1102,7 +1099,7 @@ static ext4_fsblk_t get_sb_block(void **data)
}
static int parse_options(char *options, struct super_block *sb,
- unsigned int *inum, unsigned long *journal_devnum,
+ unsigned long *journal_devnum,
ext4_fsblk_t *n_blocks_count, int is_remount)
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
@@ -1226,16 +1223,6 @@ static int parse_options(char *options, struct super_block *sb,
}
set_opt(sbi->s_mount_opt, UPDATE_JOURNAL);
break;
- case Opt_journal_inum:
- if (is_remount) {
- printk(KERN_ERR "EXT4-fs: cannot specify "
- "journal on remount\n");
- return 0;
- }
- if (match_int(&args[0], &option))
- return 0;
- *inum = option;
- break;
case Opt_journal_dev:
if (is_remount) {
printk(KERN_ERR "EXT4-fs: cannot specify "
@@ -2041,7 +2028,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
ext4_fsblk_t sb_block = get_sb_block(&data);
ext4_fsblk_t logical_sb_block;
unsigned long offset = 0;
- unsigned int journal_inum = 0;
unsigned long journal_devnum = 0;
unsigned long def_mount_opts;
struct inode *root;
@@ -2161,8 +2147,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
set_opt(sbi->s_mount_opt, DELALLOC);
- if (!parse_options((char *) data, sb, &journal_inum, &journal_devnum,
- NULL, 0))
+ if (!parse_options((char *) data, sb, &journal_devnum, NULL, 0))
goto failed_mount;
sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
@@ -2469,9 +2454,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
goto failed_mount4;
}
}
- } else if (journal_inum) {
- if (ext4_create_journal(sb, es, journal_inum))
- goto failed_mount3;
} else {
clear_opt(sbi->s_mount_opt, DATA_FLAGS);
set_opt(sbi->s_mount_opt, WRITEBACK_DATA);
@@ -2929,48 +2911,6 @@ static int ext4_load_journal(struct super_block *sb,
return 0;
}
-static int ext4_create_journal(struct super_block *sb,
- struct ext4_super_block *es,
- unsigned int journal_inum)
-{
- journal_t *journal;
- int err;
-
- if (sb->s_flags & MS_RDONLY) {
- printk(KERN_ERR "EXT4-fs: readonly filesystem when trying to "
- "create journal.\n");
- return -EROFS;
- }
-
- journal = ext4_get_journal(sb, journal_inum);
- if (!journal)
- return -EINVAL;
-
- printk(KERN_INFO "EXT4-fs: creating new journal on inode %u\n",
- journal_inum);
-
- err = jbd2_journal_create(journal);
- if (err) {
- printk(KERN_ERR "EXT4-fs: error creating journal.\n");
- jbd2_journal_destroy(journal);
- return -EIO;
- }
-
- EXT4_SB(sb)->s_journal = journal;
-
- ext4_update_dynamic_rev(sb);
- EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
- EXT4_SET_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL);
-
- es->s_journal_inum = cpu_to_le32(journal_inum);
- sb->s_dirt = 1;
-
- /* Make sure we flush the recovery flag to disk. */
- ext4_commit_super(sb, es, 1);
-
- return 0;
-}
-
static void ext4_commit_super(struct super_block *sb,
struct ext4_super_block *es, int sync)
{
@@ -3209,7 +3149,7 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
/*
* Allow the "check" option to be passed as a remount option.
*/
- if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) {
+ if (!parse_options(data, sb, NULL, &n_blocks_count, 1)) {
err = -EINVAL;
goto restore_opts;
}
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 34ef980..b10d728 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -66,7 +66,6 @@ EXPORT_SYMBOL(jbd2_journal_update_format);
EXPORT_SYMBOL(jbd2_journal_check_used_features);
EXPORT_SYMBOL(jbd2_journal_check_available_features);
EXPORT_SYMBOL(jbd2_journal_set_features);
-EXPORT_SYMBOL(jbd2_journal_create);
EXPORT_SYMBOL(jbd2_journal_load);
EXPORT_SYMBOL(jbd2_journal_destroy);
EXPORT_SYMBOL(jbd2_journal_abort);
@@ -1163,77 +1162,6 @@ static int journal_reset(journal_t *journal)
}
/**
- * int jbd2_journal_create() - Initialise the new journal file
- * @journal: Journal to create. This structure must have been initialised
- *
- * Given a journal_t structure which tells us which disk blocks we can
- * use, create a new journal superblock and initialise all of the
- * journal fields from scratch.
- **/
-int jbd2_journal_create(journal_t *journal)
-{
- unsigned long long blocknr;
- struct buffer_head *bh;
- journal_superblock_t *sb;
- int i, err;
-
- if (journal->j_maxlen < JBD2_MIN_JOURNAL_BLOCKS) {
- printk (KERN_ERR "Journal length (%d blocks) too short.\n",
- journal->j_maxlen);
- journal_fail_superblock(journal);
- return -EINVAL;
- }
-
- if (journal->j_inode == NULL) {
- /*
- * We don't know what block to start at!
- */
- printk(KERN_EMERG
- "%s: creation of journal on external device!\n",
- __func__);
- BUG();
- }
-
- /* Zero out the entire journal on disk. We cannot afford to
- have any blocks on disk beginning with JBD2_MAGIC_NUMBER. */
- jbd_debug(1, "JBD: Zeroing out journal blocks...\n");
- for (i = 0; i < journal->j_maxlen; i++) {
- err = jbd2_journal_bmap(journal, i, &blocknr);
- if (err)
- return err;
- bh = __getblk(journal->j_dev, blocknr, journal->j_blocksize);
- lock_buffer(bh);
- memset (bh->b_data, 0, journal->j_blocksize);
- BUFFER_TRACE(bh, "marking dirty");
- mark_buffer_dirty(bh);
- BUFFER_TRACE(bh, "marking uptodate");
- set_buffer_uptodate(bh);
- unlock_buffer(bh);
- __brelse(bh);
- }
-
- sync_blockdev(journal->j_dev);
- jbd_debug(1, "JBD: journal cleared.\n");
-
- /* OK, fill in the initial static fields in the new superblock */
- sb = journal->j_superblock;
-
- sb->s_header.h_magic = cpu_to_be32(JBD2_MAGIC_NUMBER);
- sb->s_header.h_blocktype = cpu_to_be32(JBD2_SUPERBLOCK_V2);
-
- sb->s_blocksize = cpu_to_be32(journal->j_blocksize);
- sb->s_maxlen = cpu_to_be32(journal->j_maxlen);
- sb->s_first = cpu_to_be32(1);
-
- journal->j_transaction_sequence = 1;
-
- journal->j_flags &= ~JBD2_ABORT;
- journal->j_format_version = 2;
-
- return journal_reset(journal);
-}
-
-/**
* void jbd2_journal_update_superblock() - Update journal sb on disk.
* @journal: The journal to update.
* @wait: Set to '0' if you don't want to wait for IO completion.
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index 9d82084..adef1c9 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -1104,7 +1104,6 @@ extern int jbd2_journal_set_features
(journal_t *, unsigned long, unsigned long, unsigned long);
extern void jbd2_journal_clear_features
(journal_t *, unsigned long, unsigned long, unsigned long);
-extern int jbd2_journal_create (journal_t *);
extern int jbd2_journal_load (journal_t *journal);
extern int jbd2_journal_destroy (journal_t *);
extern int jbd2_journal_recover (journal_t *journal);
--
1.6.0.4.8.g36f27.dirty
--
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