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-rw-r--r--fs/ext4/fast_commit.c14
-rw-r--r--fs/ext4/fast_commit.h3
-rw-r--r--fs/ext4/super.c8
-rw-r--r--fs/jbd2/journal.c96
4 files changed, 64 insertions, 57 deletions
diff --git a/fs/ext4/fast_commit.c b/fs/ext4/fast_commit.c
index 9399e9cccb7e..bab60c5d5095 100644
--- a/fs/ext4/fast_commit.c
+++ b/fs/ext4/fast_commit.c
@@ -2091,8 +2091,6 @@ static int ext4_fc_replay(journal_t *journal, struct buffer_head *bh,
void ext4_fc_init(struct super_block *sb, journal_t *journal)
{
- int num_fc_blocks;
-
/*
* We set replay callback even if fast commit disabled because we may
* could still have fast commit blocks that need to be replayed even if
@@ -2102,18 +2100,6 @@ void ext4_fc_init(struct super_block *sb, journal_t *journal)
if (!test_opt2(sb, JOURNAL_FAST_COMMIT))
return;
journal->j_fc_cleanup_callback = ext4_fc_cleanup;
- if (!buffer_uptodate(journal->j_sb_buffer)
- && ext4_read_bh_lock(journal->j_sb_buffer, REQ_META | REQ_PRIO,
- true)) {
- ext4_msg(sb, KERN_ERR, "I/O error on journal");
- return;
- }
- num_fc_blocks = be32_to_cpu(journal->j_superblock->s_num_fc_blks);
- if (jbd2_fc_init(journal, num_fc_blocks ? num_fc_blocks :
- EXT4_NUM_FC_BLKS)) {
- pr_warn("Error while enabling fast commits, turning off.");
- ext4_clear_feature_fast_commit(sb);
- }
}
const char *fc_ineligible_reasons[] = {
diff --git a/fs/ext4/fast_commit.h b/fs/ext4/fast_commit.h
index 140fbb6af19e..1d96e0ac8138 100644
--- a/fs/ext4/fast_commit.h
+++ b/fs/ext4/fast_commit.h
@@ -3,9 +3,6 @@
#ifndef __FAST_COMMIT_H__
#define __FAST_COMMIT_H__
-/* Number of blocks in journal area to allocate for fast commits */
-#define EXT4_NUM_FC_BLKS 256
-
/* Fast commit tags */
#define EXT4_FC_TAG_ADD_RANGE 0x0001
#define EXT4_FC_TAG_DEL_RANGE 0x0002
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 8a6dd433bb70..ba02d7c86fb3 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4857,6 +4857,14 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
goto failed_mount_wq;
}
+ if (test_opt2(sb, JOURNAL_FAST_COMMIT) &&
+ !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0,
+ JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) {
+ ext4_msg(sb, KERN_ERR,
+ "Failed to set fast commit journal feature");
+ goto failed_mount_wq;
+ }
+
/* We have now updated the journal if required, so we can
* validate the data journaling mode. */
switch (test_opt(sb, DATA_FLAGS)) {
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index c3c768248527..500152f0421a 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1352,19 +1352,12 @@ static journal_t *journal_init_common(struct block_device *bdev,
/* We need enough buffers to write out full descriptor block. */
n = journal->j_blocksize / jbd2_min_tag_size();
journal->j_wbufsize = n;
+ journal->j_fc_wbuf = NULL;
journal->j_wbuf = kmalloc_array(n, sizeof(struct buffer_head *),
GFP_KERNEL);
if (!journal->j_wbuf)
goto err_cleanup;
- if (journal->j_fc_wbufsize > 0) {
- journal->j_fc_wbuf = kmalloc_array(journal->j_fc_wbufsize,
- sizeof(struct buffer_head *),
- GFP_KERNEL);
- if (!journal->j_fc_wbuf)
- goto err_cleanup;
- }
-
bh = getblk_unmovable(journal->j_dev, start, journal->j_blocksize);
if (!bh) {
pr_err("%s: Cannot get buffer for journal superblock\n",
@@ -1378,23 +1371,11 @@ static journal_t *journal_init_common(struct block_device *bdev,
err_cleanup:
kfree(journal->j_wbuf);
- kfree(journal->j_fc_wbuf);
jbd2_journal_destroy_revoke(journal);
kfree(journal);
return NULL;
}
-int jbd2_fc_init(journal_t *journal, int num_fc_blks)
-{
- journal->j_fc_wbufsize = num_fc_blks;
- journal->j_fc_wbuf = kmalloc_array(journal->j_fc_wbufsize,
- sizeof(struct buffer_head *), GFP_KERNEL);
- if (!journal->j_fc_wbuf)
- return -ENOMEM;
- return 0;
-}
-EXPORT_SYMBOL(jbd2_fc_init);
-
/* jbd2_journal_init_dev and jbd2_journal_init_inode:
*
* Create a journal structure assigned some fixed set of disk blocks to
@@ -1512,16 +1493,7 @@ static int journal_reset(journal_t *journal)
}
journal->j_first = first;
-
- if (jbd2_has_feature_fast_commit(journal) &&
- journal->j_fc_wbufsize > 0) {
- journal->j_fc_last = last;
- journal->j_last = last - journal->j_fc_wbufsize;
- journal->j_fc_first = journal->j_last + 1;
- journal->j_fc_off = 0;
- } else {
- journal->j_last = last;
- }
+ journal->j_last = last;
journal->j_head = journal->j_first;
journal->j_tail = journal->j_first;
@@ -1534,6 +1506,13 @@ static int journal_reset(journal_t *journal)
journal->j_max_transaction_buffers = jbd2_journal_get_max_txn_bufs(journal);
/*
+ * Now that journal recovery is done, turn fast commits off here. This
+ * way, if fast commit was enabled before the crash but if now FS has
+ * disabled it, we don't enable fast commits.
+ */
+ jbd2_clear_feature_fast_commit(journal);
+
+ /*
* As a special case, if the on-disk copy is already marked as needing
* no recovery (s_start == 0), then we can safely defer the superblock
* update until the next commit by setting JBD2_FLUSHED. This avoids
@@ -1872,6 +1851,7 @@ static int load_superblock(journal_t *journal)
{
int err;
journal_superblock_t *sb;
+ int num_fc_blocks;
err = journal_get_superblock(journal);
if (err)
@@ -1883,15 +1863,17 @@ static int load_superblock(journal_t *journal)
journal->j_tail = be32_to_cpu(sb->s_start);
journal->j_first = be32_to_cpu(sb->s_first);
journal->j_errno = be32_to_cpu(sb->s_errno);
+ journal->j_last = be32_to_cpu(sb->s_maxlen);
- if (jbd2_has_feature_fast_commit(journal) &&
- journal->j_fc_wbufsize > 0) {
+ if (jbd2_has_feature_fast_commit(journal)) {
journal->j_fc_last = be32_to_cpu(sb->s_maxlen);
- journal->j_last = journal->j_fc_last - journal->j_fc_wbufsize;
+ num_fc_blocks = be32_to_cpu(sb->s_num_fc_blks);
+ if (!num_fc_blocks)
+ num_fc_blocks = JBD2_MIN_FC_BLOCKS;
+ if (journal->j_last - num_fc_blocks >= JBD2_MIN_JOURNAL_BLOCKS)
+ journal->j_last = journal->j_fc_last - num_fc_blocks;
journal->j_fc_first = journal->j_last + 1;
journal->j_fc_off = 0;
- } else {
- journal->j_last = be32_to_cpu(sb->s_maxlen);
}
return 0;
@@ -1954,9 +1936,6 @@ int jbd2_journal_load(journal_t *journal)
*/
journal->j_flags &= ~JBD2_ABORT;
- if (journal->j_fc_wbufsize > 0)
- jbd2_journal_set_features(journal, 0, 0,
- JBD2_FEATURE_INCOMPAT_FAST_COMMIT);
/* OK, we've finished with the dynamic journal bits:
* reinitialise the dynamic contents of the superblock in memory
* and reset them on disk. */
@@ -2040,8 +2019,7 @@ int jbd2_journal_destroy(journal_t *journal)
jbd2_journal_destroy_revoke(journal);
if (journal->j_chksum_driver)
crypto_free_shash(journal->j_chksum_driver);
- if (journal->j_fc_wbufsize > 0)
- kfree(journal->j_fc_wbuf);
+ kfree(journal->j_fc_wbuf);
kfree(journal->j_wbuf);
kfree(journal);
@@ -2116,6 +2094,37 @@ int jbd2_journal_check_available_features(journal_t *journal, unsigned long comp
return 0;
}
+static int
+jbd2_journal_initialize_fast_commit(journal_t *journal)
+{
+ journal_superblock_t *sb = journal->j_superblock;
+ unsigned long long num_fc_blks;
+
+ num_fc_blks = be32_to_cpu(sb->s_num_fc_blks);
+ if (num_fc_blks == 0)
+ num_fc_blks = JBD2_MIN_FC_BLOCKS;
+ if (journal->j_last - num_fc_blks < JBD2_MIN_JOURNAL_BLOCKS)
+ return -ENOSPC;
+
+ /* Are we called twice? */
+ WARN_ON(journal->j_fc_wbuf != NULL);
+ journal->j_fc_wbuf = kmalloc_array(num_fc_blks,
+ sizeof(struct buffer_head *), GFP_KERNEL);
+ if (!journal->j_fc_wbuf)
+ return -ENOMEM;
+
+ journal->j_fc_wbufsize = num_fc_blks;
+ journal->j_fc_last = journal->j_last;
+ journal->j_last = journal->j_fc_last - num_fc_blks;
+ journal->j_fc_first = journal->j_last + 1;
+ journal->j_fc_off = 0;
+ journal->j_free = journal->j_last - journal->j_first;
+ journal->j_max_transaction_buffers =
+ jbd2_journal_get_max_txn_bufs(journal);
+
+ return 0;
+}
+
/**
* int jbd2_journal_set_features() - Mark a given journal feature in the superblock
* @journal: Journal to act on.
@@ -2159,6 +2168,13 @@ int jbd2_journal_set_features(journal_t *journal, unsigned long compat,
sb = journal->j_superblock;
+ if (incompat & JBD2_FEATURE_INCOMPAT_FAST_COMMIT) {
+ if (jbd2_journal_initialize_fast_commit(journal)) {
+ pr_err("JBD2: Cannot enable fast commits.\n");
+ return 0;
+ }
+ }
+
/* Load the checksum driver if necessary */
if ((journal->j_chksum_driver == NULL) &&
INCOMPAT_FEATURE_ON(JBD2_FEATURE_INCOMPAT_CSUM_V3)) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-03 11:31:50 +0000