summaryrefslogtreecommitdiffstats
path: root/fs/jbd2
diff options
context:
space:
mode:
Diffstat (limited to 'fs/jbd2')
-rw-r--r--fs/jbd2/checkpoint.c2
-rw-r--r--fs/jbd2/commit.c26
-rw-r--r--fs/jbd2/journal.c65
-rw-r--r--fs/jbd2/revoke.c6
-rw-r--r--fs/jbd2/transaction.c400
5 files changed, 294 insertions, 205 deletions
diff --git a/fs/jbd2/checkpoint.c b/fs/jbd2/checkpoint.c
index a1909066bde6..8fff6677a5da 100644
--- a/fs/jbd2/checkpoint.c
+++ b/fs/jbd2/checkpoint.c
@@ -110,7 +110,7 @@ void __jbd2_log_wait_for_space(journal_t *journal)
int nblocks, space_left;
/* assert_spin_locked(&journal->j_state_lock); */
- nblocks = jbd2_space_needed(journal);
+ nblocks = journal->j_max_transaction_buffers;
while (jbd2_log_space_left(journal) < nblocks) {
write_unlock(&journal->j_state_lock);
mutex_lock_io(&journal->j_checkpoint_mutex);
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index 132fb92098c7..7f0b362b3842 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -482,10 +482,10 @@ void jbd2_journal_commit_transaction(journal_t *journal)
if (jh->b_committed_data) {
struct buffer_head *bh = jh2bh(jh);
- jbd_lock_bh_state(bh);
+ spin_lock(&jh->b_state_lock);
jbd2_free(jh->b_committed_data, bh->b_size);
jh->b_committed_data = NULL;
- jbd_unlock_bh_state(bh);
+ spin_unlock(&jh->b_state_lock);
}
jbd2_journal_refile_buffer(journal, jh);
}
@@ -560,8 +560,7 @@ void jbd2_journal_commit_transaction(journal_t *journal)
stats.run.rs_logging = jiffies;
stats.run.rs_flushing = jbd2_time_diff(stats.run.rs_flushing,
stats.run.rs_logging);
- stats.run.rs_blocks =
- atomic_read(&commit_transaction->t_outstanding_credits);
+ stats.run.rs_blocks = commit_transaction->t_nr_buffers;
stats.run.rs_blocks_logged = 0;
J_ASSERT(commit_transaction->t_nr_buffers <=
@@ -642,8 +641,7 @@ void jbd2_journal_commit_transaction(journal_t *journal)
/*
* start_this_handle() uses t_outstanding_credits to determine
- * the free space in the log, but this counter is changed
- * by jbd2_journal_next_log_block() also.
+ * the free space in the log.
*/
atomic_dec(&commit_transaction->t_outstanding_credits);
@@ -727,7 +725,6 @@ start_journal_io:
submit_bh(REQ_OP_WRITE, REQ_SYNC, bh);
}
cond_resched();
- stats.run.rs_blocks_logged += bufs;
/* Force a new descriptor to be generated next
time round the loop. */
@@ -814,6 +811,7 @@ start_journal_io:
if (unlikely(!buffer_uptodate(bh)))
err = -EIO;
jbd2_unfile_log_bh(bh);
+ stats.run.rs_blocks_logged++;
/*
* The list contains temporary buffer heads created by
@@ -859,6 +857,7 @@ start_journal_io:
BUFFER_TRACE(bh, "ph5: control buffer writeout done: unfile");
clear_buffer_jwrite(bh);
jbd2_unfile_log_bh(bh);
+ stats.run.rs_blocks_logged++;
__brelse(bh); /* One for getblk */
/* AKPM: bforget here */
}
@@ -880,6 +879,7 @@ start_journal_io:
}
if (cbh)
err = journal_wait_on_commit_record(journal, cbh);
+ stats.run.rs_blocks_logged++;
if (jbd2_has_feature_async_commit(journal) &&
journal->j_flags & JBD2_BARRIER) {
blkdev_issue_flush(journal->j_dev, GFP_NOFS, NULL);
@@ -888,6 +888,9 @@ start_journal_io:
if (err)
jbd2_journal_abort(journal, err);
+ WARN_ON_ONCE(
+ atomic_read(&commit_transaction->t_outstanding_credits) < 0);
+
/*
* Now disk caches for filesystem device are flushed so we are safe to
* erase checkpointed transactions from the log by updating journal
@@ -918,6 +921,7 @@ restart_loop:
transaction_t *cp_transaction;
struct buffer_head *bh;
int try_to_free = 0;
+ bool drop_ref;
jh = commit_transaction->t_forget;
spin_unlock(&journal->j_list_lock);
@@ -927,7 +931,7 @@ restart_loop:
* done with it.
*/
get_bh(bh);
- jbd_lock_bh_state(bh);
+ spin_lock(&jh->b_state_lock);
J_ASSERT_JH(jh, jh->b_transaction == commit_transaction);
/*
@@ -1022,8 +1026,10 @@ restart_loop:
try_to_free = 1;
}
JBUFFER_TRACE(jh, "refile or unfile buffer");
- __jbd2_journal_refile_buffer(jh);
- jbd_unlock_bh_state(bh);
+ drop_ref = __jbd2_journal_refile_buffer(jh);
+ spin_unlock(&jh->b_state_lock);
+ if (drop_ref)
+ jbd2_journal_put_journal_head(jh);
if (try_to_free)
release_buffer_page(bh); /* Drops bh reference */
else
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 1c58859aa592..5e408ee24a1a 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -363,7 +363,7 @@ int jbd2_journal_write_metadata_buffer(transaction_t *transaction,
/* keep subsequent assertions sane */
atomic_set(&new_bh->b_count, 1);
- jbd_lock_bh_state(bh_in);
+ spin_lock(&jh_in->b_state_lock);
repeat:
/*
* If a new transaction has already done a buffer copy-out, then
@@ -405,13 +405,13 @@ repeat:
if (need_copy_out && !done_copy_out) {
char *tmp;
- jbd_unlock_bh_state(bh_in);
+ spin_unlock(&jh_in->b_state_lock);
tmp = jbd2_alloc(bh_in->b_size, GFP_NOFS);
if (!tmp) {
brelse(new_bh);
return -ENOMEM;
}
- jbd_lock_bh_state(bh_in);
+ spin_lock(&jh_in->b_state_lock);
if (jh_in->b_frozen_data) {
jbd2_free(tmp, bh_in->b_size);
goto repeat;
@@ -464,7 +464,7 @@ repeat:
__jbd2_journal_file_buffer(jh_in, transaction, BJ_Shadow);
spin_unlock(&journal->j_list_lock);
set_buffer_shadow(bh_in);
- jbd_unlock_bh_state(bh_in);
+ spin_unlock(&jh_in->b_state_lock);
return do_escape | (done_copy_out << 1);
}
@@ -840,6 +840,7 @@ jbd2_journal_get_descriptor_buffer(transaction_t *transaction, int type)
bh = __getblk(journal->j_dev, blocknr, journal->j_blocksize);
if (!bh)
return NULL;
+ atomic_dec(&transaction->t_outstanding_credits);
lock_buffer(bh);
memset(bh->b_data, 0, journal->j_blocksize);
header = (journal_header_t *)bh->b_data;
@@ -1098,6 +1099,16 @@ static void jbd2_stats_proc_exit(journal_t *journal)
remove_proc_entry(journal->j_devname, proc_jbd2_stats);
}
+/* Minimum size of descriptor tag */
+static int jbd2_min_tag_size(void)
+{
+ /*
+ * Tag with 32-bit block numbers does not use last four bytes of the
+ * structure
+ */
+ return sizeof(journal_block_tag_t) - 4;
+}
+
/*
* Management for journal control blocks: functions to create and
* destroy journal_t structures, and to initialise and read existing
@@ -1156,7 +1167,8 @@ static journal_t *journal_init_common(struct block_device *bdev,
journal->j_fs_dev = fs_dev;
journal->j_blk_offset = start;
journal->j_maxlen = len;
- n = journal->j_blocksize / sizeof(journal_block_tag_t);
+ /* We need enough buffers to write out full descriptor block. */
+ n = journal->j_blocksize / jbd2_min_tag_size();
journal->j_wbufsize = n;
journal->j_wbuf = kmalloc_array(n, sizeof(struct buffer_head *),
GFP_KERNEL);
@@ -1488,6 +1500,21 @@ void jbd2_journal_update_sb_errno(journal_t *journal)
}
EXPORT_SYMBOL(jbd2_journal_update_sb_errno);
+static int journal_revoke_records_per_block(journal_t *journal)
+{
+ int record_size;
+ int space = journal->j_blocksize - sizeof(jbd2_journal_revoke_header_t);
+
+ if (jbd2_has_feature_64bit(journal))
+ record_size = 8;
+ else
+ record_size = 4;
+
+ if (jbd2_journal_has_csum_v2or3(journal))
+ space -= sizeof(struct jbd2_journal_block_tail);
+ return space / record_size;
+}
+
/*
* Read the superblock for a given journal, performing initial
* validation of the format.
@@ -1596,6 +1623,8 @@ static int journal_get_superblock(journal_t *journal)
sizeof(sb->s_uuid));
}
+ journal->j_revoke_records_per_block =
+ journal_revoke_records_per_block(journal);
set_buffer_verified(bh);
return 0;
@@ -1916,6 +1945,8 @@ int jbd2_journal_set_features (journal_t *journal, unsigned long compat,
sb->s_feature_ro_compat |= cpu_to_be32(ro);
sb->s_feature_incompat |= cpu_to_be32(incompat);
unlock_buffer(journal->j_sb_buffer);
+ journal->j_revoke_records_per_block =
+ journal_revoke_records_per_block(journal);
return 1;
#undef COMPAT_FEATURE_ON
@@ -1946,6 +1977,8 @@ void jbd2_journal_clear_features(journal_t *journal, unsigned long compat,
sb->s_feature_compat &= ~cpu_to_be32(compat);
sb->s_feature_ro_compat &= ~cpu_to_be32(ro);
sb->s_feature_incompat &= ~cpu_to_be32(incompat);
+ journal->j_revoke_records_per_block =
+ journal_revoke_records_per_block(journal);
}
EXPORT_SYMBOL(jbd2_journal_clear_features);
@@ -2410,6 +2443,8 @@ static struct journal_head *journal_alloc_journal_head(void)
ret = kmem_cache_zalloc(jbd2_journal_head_cache,
GFP_NOFS | __GFP_NOFAIL);
}
+ if (ret)
+ spin_lock_init(&ret->b_state_lock);
return ret;
}
@@ -2529,17 +2564,23 @@ static void __journal_remove_journal_head(struct buffer_head *bh)
J_ASSERT_BH(bh, buffer_jbd(bh));
J_ASSERT_BH(bh, jh2bh(jh) == bh);
BUFFER_TRACE(bh, "remove journal_head");
+
+ /* Unlink before dropping the lock */
+ bh->b_private = NULL;
+ jh->b_bh = NULL; /* debug, really */
+ clear_buffer_jbd(bh);
+}
+
+static void journal_release_journal_head(struct journal_head *jh, size_t b_size)
+{
if (jh->b_frozen_data) {
printk(KERN_WARNING "%s: freeing b_frozen_data\n", __func__);
- jbd2_free(jh->b_frozen_data, bh->b_size);
+ jbd2_free(jh->b_frozen_data, b_size);
}
if (jh->b_committed_data) {
printk(KERN_WARNING "%s: freeing b_committed_data\n", __func__);
- jbd2_free(jh->b_committed_data, bh->b_size);
+ jbd2_free(jh->b_committed_data, b_size);
}
- bh->b_private = NULL;
- jh->b_bh = NULL; /* debug, really */
- clear_buffer_jbd(bh);
journal_free_journal_head(jh);
}
@@ -2557,9 +2598,11 @@ void jbd2_journal_put_journal_head(struct journal_head *jh)
if (!jh->b_jcount) {
__journal_remove_journal_head(bh);
jbd_unlock_bh_journal_head(bh);
+ journal_release_journal_head(jh, bh->b_size);
__brelse(bh);
- } else
+ } else {
jbd_unlock_bh_journal_head(bh);
+ }
}
/*
diff --git a/fs/jbd2/revoke.c b/fs/jbd2/revoke.c
index f08073d7bbf5..fa608788b93d 100644
--- a/fs/jbd2/revoke.c
+++ b/fs/jbd2/revoke.c
@@ -371,6 +371,11 @@ int jbd2_journal_revoke(handle_t *handle, unsigned long long blocknr,
}
#endif
+ if (WARN_ON_ONCE(handle->h_revoke_credits <= 0)) {
+ if (!bh_in)
+ brelse(bh);
+ return -EIO;
+ }
/* We really ought not ever to revoke twice in a row without
first having the revoke cancelled: it's illegal to free a
block twice without allocating it in between! */
@@ -391,6 +396,7 @@ int jbd2_journal_revoke(handle_t *handle, unsigned long long blocknr,
__brelse(bh);
}
}
+ handle->h_revoke_credits--;
jbd_debug(2, "insert revoke for block %llu, bh_in=%p\n",blocknr, bh_in);
err = insert_revoke_hash(journal, blocknr,
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index b25ebdcabfa3..27b9f9dee434 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -63,6 +63,28 @@ void jbd2_journal_free_transaction(transaction_t *transaction)
}
/*
+ * Base amount of descriptor blocks we reserve for each transaction.
+ */
+static int jbd2_descriptor_blocks_per_trans(journal_t *journal)
+{
+ int tag_space = journal->j_blocksize - sizeof(journal_header_t);
+ int tags_per_block;
+
+ /* Subtract UUID */
+ tag_space -= 16;
+ if (jbd2_journal_has_csum_v2or3(journal))
+ tag_space -= sizeof(struct jbd2_journal_block_tail);
+ /* Commit code leaves a slack space of 16 bytes at the end of block */
+ tags_per_block = (tag_space - 16) / journal_tag_bytes(journal);
+ /*
+ * Revoke descriptors are accounted separately so we need to reserve
+ * space for commit block and normal transaction descriptor blocks.
+ */
+ return 1 + DIV_ROUND_UP(journal->j_max_transaction_buffers,
+ tags_per_block);
+}
+
+/*
* jbd2_get_transaction: obtain a new transaction_t object.
*
* Simply initialise a new transaction. Initialize it in
@@ -88,7 +110,9 @@ static void jbd2_get_transaction(journal_t *journal,
spin_lock_init(&transaction->t_handle_lock);
atomic_set(&transaction->t_updates, 0);
atomic_set(&transaction->t_outstanding_credits,
+ jbd2_descriptor_blocks_per_trans(journal) +
atomic_read(&journal->j_reserved_credits));
+ atomic_set(&transaction->t_outstanding_revokes, 0);
atomic_set(&transaction->t_handle_count, 0);
INIT_LIST_HEAD(&transaction->t_inode_list);
INIT_LIST_HEAD(&transaction->t_private_list);
@@ -258,12 +282,13 @@ static int add_transaction_credits(journal_t *journal, int blocks,
* *before* starting to dirty potentially checkpointed buffers
* in the new transaction.
*/
- if (jbd2_log_space_left(journal) < jbd2_space_needed(journal)) {
+ if (jbd2_log_space_left(journal) < journal->j_max_transaction_buffers) {
atomic_sub(total, &t->t_outstanding_credits);
read_unlock(&journal->j_state_lock);
jbd2_might_wait_for_commit(journal);
write_lock(&journal->j_state_lock);
- if (jbd2_log_space_left(journal) < jbd2_space_needed(journal))
+ if (jbd2_log_space_left(journal) <
+ journal->j_max_transaction_buffers)
__jbd2_log_wait_for_space(journal);
write_unlock(&journal->j_state_lock);
return 1;
@@ -299,12 +324,12 @@ static int start_this_handle(journal_t *journal, handle_t *handle,
gfp_t gfp_mask)
{
transaction_t *transaction, *new_transaction = NULL;
- int blocks = handle->h_buffer_credits;
+ int blocks = handle->h_total_credits;
int rsv_blocks = 0;
unsigned long ts = jiffies;
if (handle->h_rsv_handle)
- rsv_blocks = handle->h_rsv_handle->h_buffer_credits;
+ rsv_blocks = handle->h_rsv_handle->h_total_credits;
/*
* Limit the number of reserved credits to 1/2 of maximum transaction
@@ -405,6 +430,7 @@ repeat:
update_t_max_wait(transaction, ts);
handle->h_transaction = transaction;
handle->h_requested_credits = blocks;
+ handle->h_revoke_credits_requested = handle->h_revoke_credits;
handle->h_start_jiffies = jiffies;
atomic_inc(&transaction->t_updates);
atomic_inc(&transaction->t_handle_count);
@@ -431,15 +457,15 @@ static handle_t *new_handle(int nblocks)
handle_t *handle = jbd2_alloc_handle(GFP_NOFS);
if (!handle)
return NULL;
- handle->h_buffer_credits = nblocks;
+ handle->h_total_credits = nblocks;
handle->h_ref = 1;
return handle;
}
handle_t *jbd2__journal_start(journal_t *journal, int nblocks, int rsv_blocks,
- gfp_t gfp_mask, unsigned int type,
- unsigned int line_no)
+ int revoke_records, gfp_t gfp_mask,
+ unsigned int type, unsigned int line_no)
{
handle_t *handle = journal_current_handle();
int err;
@@ -453,6 +479,8 @@ handle_t *jbd2__journal_start(journal_t *journal, int nblocks, int rsv_blocks,
return handle;
}
+ nblocks += DIV_ROUND_UP(revoke_records,
+ journal->j_revoke_records_per_block);
handle = new_handle(nblocks);
if (!handle)
return ERR_PTR(-ENOMEM);
@@ -468,6 +496,7 @@ handle_t *jbd2__journal_start(journal_t *journal, int nblocks, int rsv_blocks,
rsv_handle->h_journal = journal;
handle->h_rsv_handle = rsv_handle;
}
+ handle->h_revoke_credits = revoke_records;
err = start_this_handle(journal, handle, gfp_mask);
if (err < 0) {
@@ -508,16 +537,21 @@ EXPORT_SYMBOL(jbd2__journal_start);
*/
handle_t *jbd2_journal_start(journal_t *journal, int nblocks)
{
- return jbd2__journal_start(journal, nblocks, 0, GFP_NOFS, 0, 0);
+ return jbd2__journal_start(journal, nblocks, 0, 0, GFP_NOFS, 0, 0);
}
EXPORT_SYMBOL(jbd2_journal_start);
-void jbd2_journal_free_reserved(handle_t *handle)
+static void __jbd2_journal_unreserve_handle(handle_t *handle)
{
journal_t *journal = handle->h_journal;
WARN_ON(!handle->h_reserved);
- sub_reserved_credits(journal, handle->h_buffer_credits);
+ sub_reserved_credits(journal, handle->h_total_credits);
+}
+
+void jbd2_journal_free_reserved(handle_t *handle)
+{
+ __jbd2_journal_unreserve_handle(handle);
jbd2_free_handle(handle);
}
EXPORT_SYMBOL(jbd2_journal_free_reserved);
@@ -571,7 +605,7 @@ int jbd2_journal_start_reserved(handle_t *handle, unsigned int type,
handle->h_line_no = line_no;
trace_jbd2_handle_start(journal->j_fs_dev->bd_dev,
handle->h_transaction->t_tid, type,
- line_no, handle->h_buffer_credits);
+ line_no, handle->h_total_credits);
return 0;
}
EXPORT_SYMBOL(jbd2_journal_start_reserved);
@@ -580,6 +614,7 @@ EXPORT_SYMBOL(jbd2_journal_start_reserved);
* int jbd2_journal_extend() - extend buffer credits.
* @handle: handle to 'extend'
* @nblocks: nr blocks to try to extend by.
+ * @revoke_records: number of revoke records to try to extend by.
*
* Some transactions, such as large extends and truncates, can be done
* atomically all at once or in several stages. The operation requests
@@ -596,7 +631,7 @@ EXPORT_SYMBOL(jbd2_journal_start_reserved);
* return code < 0 implies an error
* return code > 0 implies normal transaction-full status.
*/
-int jbd2_journal_extend(handle_t *handle, int nblocks)
+int jbd2_journal_extend(handle_t *handle, int nblocks, int revoke_records)
{
transaction_t *transaction = handle->h_transaction;
journal_t *journal;
@@ -618,6 +653,12 @@ int jbd2_journal_extend(handle_t *handle, int nblocks)
goto error_out;
}
+ nblocks += DIV_ROUND_UP(
+ handle->h_revoke_credits_requested + revoke_records,
+ journal->j_revoke_records_per_block) -
+ DIV_ROUND_UP(
+ handle->h_revoke_credits_requested,
+ journal->j_revoke_records_per_block);
spin_lock(&transaction->t_handle_lock);
wanted = atomic_add_return(nblocks,
&transaction->t_outstanding_credits);
@@ -629,22 +670,16 @@ int jbd2_journal_extend(handle_t *handle, int nblocks)
goto unlock;
}
- if (wanted + (wanted >> JBD2_CONTROL_BLOCKS_SHIFT) >
- jbd2_log_space_left(journal)) {
- jbd_debug(3, "denied handle %p %d blocks: "
- "insufficient log space\n", handle, nblocks);
- atomic_sub(nblocks, &transaction->t_outstanding_credits);
- goto unlock;
- }
-
trace_jbd2_handle_extend(journal->j_fs_dev->bd_dev,
transaction->t_tid,
handle->h_type, handle->h_line_no,
- handle->h_buffer_credits,
+ handle->h_total_credits,
nblocks);
- handle->h_buffer_credits += nblocks;
+ handle->h_total_credits += nblocks;
handle->h_requested_credits += nblocks;
+ handle->h_revoke_credits += revoke_records;
+ handle->h_revoke_credits_requested += revoke_records;
result = 0;
jbd_debug(3, "extended handle %p by %d\n", handle, nblocks);
@@ -655,11 +690,55 @@ error_out:
return result;
}
+static void stop_this_handle(handle_t *handle)
+{
+ transaction_t *transaction = handle->h_transaction;
+ journal_t *journal = transaction->t_journal;
+ int revokes;
+
+ J_ASSERT(journal_current_handle() == handle);
+ J_ASSERT(atomic_read(&transaction->t_updates) > 0);
+ current->journal_info = NULL;
+ /*
+ * Subtract necessary revoke descriptor blocks from handle credits. We
+ * take care to account only for revoke descriptor blocks the
+ * transaction will really need as large sequences of transactions with
+ * small numbers of revokes are relatively common.
+ */
+ revokes = handle->h_revoke_credits_requested - handle->h_revoke_credits;
+ if (revokes) {
+ int t_revokes, revoke_descriptors;
+ int rr_per_blk = journal->j_revoke_records_per_block;
+
+ WARN_ON_ONCE(DIV_ROUND_UP(revokes, rr_per_blk)
+ > handle->h_total_credits);
+ t_revokes = atomic_add_return(revokes,
+ &transaction->t_outstanding_revokes);
+ revoke_descriptors =
+ DIV_ROUND_UP(t_revokes, rr_per_blk) -
+ DIV_ROUND_UP(t_revokes - revokes, rr_per_blk);
+ handle->h_total_credits -= revoke_descriptors;
+ }
+ atomic_sub(handle->h_total_credits,
+ &transaction->t_outstanding_credits);
+ if (handle->h_rsv_handle)
+ __jbd2_journal_unreserve_handle(handle->h_rsv_handle);
+ if (atomic_dec_and_test(&transaction->t_updates))
+ wake_up(&journal->j_wait_updates);
+
+ rwsem_release(&journal->j_trans_commit_map, _THIS_IP_);
+ /*
+ * Scope of the GFP_NOFS context is over here and so we can restore the
+ * original alloc context.
+ */
+ memalloc_nofs_restore(handle->saved_alloc_context);
+}
/**
* int jbd2_journal_restart() - restart a handle .
* @handle: handle to restart
* @nblocks: nr credits requested
+ * @revoke_records: number of revoke record credits requested
* @gfp_mask: memory allocation flags (for start_this_handle)
*
* Restart a handle for a multi-transaction filesystem
@@ -672,56 +751,48 @@ error_out:
* credits. We preserve reserved handle if there's any attached to the
* passed in handle.
*/
-int jbd2__journal_restart(handle_t *handle, int nblocks, gfp_t gfp_mask)
+int jbd2__journal_restart(handle_t *handle, int nblocks, int revoke_records,
+ gfp_t gfp_mask)
{
transaction_t *transaction = handle->h_transaction;
journal_t *journal;
tid_t tid;
- int need_to_start, ret;
+ int need_to_start;
+ int ret;
/* If we've had an abort of any type, don't even think about
* actually doing the restart! */
if (is_handle_aborted(handle))
return 0;
journal = transaction->t_journal;
+ tid = transaction->t_tid;
/*
* First unlink the handle from its current transaction, and start the
* commit on that.
*/
- J_ASSERT(atomic_read(&transaction->t_updates) > 0);
- J_ASSERT(journal_current_handle() == handle);
-
- read_lock(&journal->j_state_lock);
- spin_lock(&transaction->t_handle_lock);
- atomic_sub(handle->h_buffer_credits,
- &transaction->t_outstanding_credits);
- if (handle->h_rsv_handle) {
- sub_reserved_credits(journal,
- handle->h_rsv_handle->h_buffer_credits);
- }
- if (atomic_dec_and_test(&transaction->t_updates))
- wake_up(&journal->j_wait_updates);
- tid = transaction->t_tid;
- spin_unlock(&transaction->t_handle_lock);
+ jbd_debug(2, "restarting handle %p\n", handle);
+ stop_this_handle(handle);
handle->h_transaction = NULL;
- current->journal_info = NULL;
- jbd_debug(2, "restarting handle %p\n", handle);
+ /*
+ * TODO: If we use READ_ONCE / WRITE_ONCE for j_commit_request we can
+ * get rid of pointless j_state_lock traffic like this.
+ */
+ read_lock(&journal->j_state_lock);
need_to_start = !tid_geq(journal->j_commit_request, tid);
read_unlock(&journal->j_state_lock);
if (need_to_start)
jbd2_log_start_commit(journal, tid);
-
- rwsem_release(&journal->j_trans_commit_map, _THIS_IP_);
- handle->h_buffer_credits = nblocks;
- /*
- * Restore the original nofs context because the journal restart
- * is basically the same thing as journal stop and start.
- * start_this_handle will start a new nofs context.
- */
- memalloc_nofs_restore(handle->saved_alloc_context);
+ handle->h_total_credits = nblocks +
+ DIV_ROUND_UP(revoke_records,
+ journal->j_revoke_records_per_block);
+ handle->h_revoke_credits = revoke_records;
ret = start_this_handle(journal, handle, gfp_mask);
+ trace_jbd2_handle_restart(journal->j_fs_dev->bd_dev,
+ ret ? 0 : handle->h_transaction->t_tid,
+ handle->h_type, handle->h_line_no,
+ handle->h_total_credits);
return ret;
}
EXPORT_SYMBOL(jbd2__journal_restart);
@@ -729,7 +800,7 @@ EXPORT_SYMBOL(jbd2__journal_restart);
int jbd2_journal_restart(handle_t *handle, int nblocks)
{
- return jbd2__journal_restart(handle, nblocks, GFP_NOFS);
+ return jbd2__journal_restart(handle, nblocks, 0, GFP_NOFS);
}
EXPORT_SYMBOL(jbd2_journal_restart);
@@ -879,7 +950,7 @@ repeat:
start_lock = jiffies;
lock_buffer(bh);
- jbd_lock_bh_state(bh);
+ spin_lock(&jh->b_state_lock);
/* If it takes too long to lock the buffer, trace it */
time_lock = jbd2_time_diff(start_lock, jiffies);
@@ -929,7 +1000,7 @@ repeat:
error = -EROFS;
if (is_handle_aborted(handle)) {
- jbd_unlock_bh_state(bh);
+ spin_unlock(&jh->b_state_lock);
goto out;
}
error = 0;
@@ -993,7 +1064,7 @@ repeat:
*/
if (buffer_shadow(bh)) {
JBUFFER_TRACE(jh, "on shadow: sleep");
- jbd_unlock_bh_state(bh);
+ spin_unlock(&jh->b_state_lock);
wait_on_bit_io(&bh->b_state, BH_Shadow, TASK_UNINTERRUPTIBLE);
goto repeat;
}
@@ -1014,7 +1085,7 @@ repeat:
JBUFFER_TRACE(jh, "generate frozen data");
if (!frozen_buffer) {
JBUFFER_TRACE(jh, "allocate memory for buffer");
- jbd_unlock_bh_state(bh);
+ spin_unlock(&jh->b_state_lock);
frozen_buffer = jbd2_alloc(jh2bh(jh)->b_size,
GFP_NOFS | __GFP_NOFAIL);
goto repeat;
@@ -1033,7 +1104,7 @@ attach_next:
jh->b_next_transaction = transaction;
done:
- jbd_unlock_bh_state(bh);
+ spin_unlock(&jh->b_state_lock);
/*
* If we are about to journal a buffer, then any revoke pending on it is
@@ -1172,7 +1243,7 @@ int jbd2_journal_get_create_access(handle_t *handle, struct buffer_head *bh)
* that case: the transaction must have deleted the buffer for it to be
* reused here.
*/
- jbd_lock_bh_state(bh);
+ spin_lock(&jh->b_state_lock);
J_ASSERT_JH(jh, (jh->b_transaction == transaction ||
jh->b_transaction == NULL ||
(jh->b_transaction == journal->j_committing_transaction &&
@@ -1207,7 +1278,7 @@ int jbd2_journal_get_create_access(handle_t *handle, struct buffer_head *bh)
jh->b_next_transaction = transaction;
spin_unlock(&journal->j_list_lock);
}
- jbd_unlock_bh_state(bh);
+ spin_unlock(&jh->b_state_lock);
/*
* akpm: I added this. ext3_alloc_branch can pick up new indirect
@@ -1275,13 +1346,13 @@ repeat:
committed_data = jbd2_alloc(jh2bh(jh)->b_size,
GFP_NOFS|__GFP_NOFAIL);
- jbd_lock_bh_state(bh);
+ spin_lock(&jh->b_state_lock);
if (!jh->b_committed_data) {
/* Copy out the current buffer contents into the
* preserved, committed copy. */
JBUFFER_TRACE(jh, "generate b_committed data");
if (!committed_data) {
- jbd_unlock_bh_state(bh);
+ spin_unlock(&jh->b_state_lock);
goto repeat;
}
@@ -1289,7 +1360,7 @@ repeat:
committed_data = NULL;
memcpy(jh->b_committed_data, bh->b_data, bh->b_size);
}
- jbd_unlock_bh_state(bh);
+ spin_unlock(&jh->b_state_lock);
out:
jbd2_journal_put_journal_head(jh);
if (unlikely(committed_data))
@@ -1390,16 +1461,16 @@ int jbd2_journal_dirty_metadata(handle_t *handle, struct buffer_head *bh)
*/
if (jh->b_transaction != transaction &&
jh->b_next_transaction != transaction) {
- jbd_lock_bh_state(bh);
+ spin_lock(&jh->b_state_lock);
J_ASSERT_JH(jh, jh->b_transaction == transaction ||
jh->b_next_transaction == transaction);
- jbd_unlock_bh_state(bh);
+ spin_unlock(&jh->b_state_lock);
}
if (jh->b_modified == 1) {
/* If it's in our transaction it must be in BJ_Metadata list. */
if (jh->b_transaction == transaction &&
jh->b_jlist != BJ_Metadata) {
- jbd_lock_bh_state(bh);
+ spin_lock(&jh->b_state_lock);
if (jh->b_transaction == transaction &&
jh->b_jlist != BJ_Metadata)
pr_err("JBD2: assertion failure: h_type=%u "
@@ -1409,13 +1480,13 @@ int jbd2_journal_dirty_metadata(handle_t *handle, struct buffer_head *bh)
jh->b_jlist);
J_ASSERT_JH(jh, jh->b_transaction != transaction ||
jh->b_jlist == BJ_Metadata);
- jbd_unlock_bh_state(bh);
+ spin_unlock(&jh->b_state_lock);
}
goto out;
}
journal = transaction->t_journal;
- jbd_lock_bh_state(bh);
+ spin_lock(&jh->b_state_lock);
if (jh->b_modified == 0) {
/*
@@ -1423,12 +1494,12 @@ int jbd2_journal_dirty_metadata(handle_t *handle, struct buffer_head *bh)
* of the transaction. This needs to be done
* once a transaction -bzzz
*/
- if (handle->h_buffer_credits <= 0) {
+ if (WARN_ON_ONCE(jbd2_handle_buffer_credits(handle) <= 0)) {
ret = -ENOSPC;
goto out_unlock_bh;
}
jh->b_modified = 1;
- handle->h_buffer_credits--;
+ handle->h_total_credits--;
}
/*
@@ -1501,7 +1572,7 @@ int jbd2_journal_dirty_metadata(handle_t *handle, struct buffer_head *bh)
__jbd2_journal_file_buffer(jh, transaction, BJ_Metadata);
spin_unlock(&journal->j_list_lock);
out_unlock_bh:
- jbd_unlock_bh_state(bh);
+ spin_unlock(&jh->b_state_lock);
out:
JBUFFER_TRACE(jh, "exit");
return ret;
@@ -1539,18 +1610,20 @@ int jbd2_journal_forget (handle_t *handle, struct buffer_head *bh)
BUFFER_TRACE(bh, "entry");
- jbd_lock_bh_state(bh);
+ jh = jbd2_journal_grab_journal_head(bh);
+ if (!jh) {
+ __bforget(bh);
+ return 0;
+ }
- if (!buffer_jbd(bh))
- goto not_jbd;
- jh = bh2jh(bh);
+ spin_lock(&jh->b_state_lock);
/* Critical error: attempting to delete a bitmap buffer, maybe?
* Don't do any jbd operations, and return an error. */
if (!J_EXPECT_JH(jh, !jh->b_committed_data,
"inconsistent data on disk")) {
err = -EIO;
- goto not_jbd;
+ goto drop;
}
/* keep track of whether or not this transaction modified us */
@@ -1598,10 +1671,7 @@ int jbd2_journal_forget (handle_t *handle, struct buffer_head *bh)
__jbd2_journal_file_buffer(jh, transaction, BJ_Forget);
} else {
__jbd2_journal_unfile_buffer(jh);
- if (!buffer_jbd(bh)) {
- spin_unlock(&journal->j_list_lock);
- goto not_jbd;
- }
+ jbd2_journal_put_journal_head(jh);
}
spin_unlock(&journal->j_list_lock);
} else if (jh->b_transaction) {
@@ -1643,7 +1713,7 @@ int jbd2_journal_forget (handle_t *handle, struct buffer_head *bh)
if (!jh->b_cp_transaction) {
JBUFFER_TRACE(jh, "belongs to none transaction");
spin_unlock(&journal->j_list_lock);
- goto not_jbd;
+ goto drop;
}
/*
@@ -1653,7 +1723,7 @@ int jbd2_journal_forget (handle_t *handle, struct buffer_head *bh)
if (!buffer_dirty(bh)) {
__jbd2_journal_remove_checkpoint(jh);
spin_unlock(&journal->j_list_lock);
- goto not_jbd;
+ goto drop;
}
/*
@@ -1666,20 +1736,15 @@ int jbd2_journal_forget (handle_t *handle, struct buffer_head *bh)
__jbd2_journal_file_buffer(jh, transaction, BJ_Forget);
spin_unlock(&journal->j_list_lock);
}
-
- jbd_unlock_bh_state(bh);
- __brelse(bh);
drop:
+ __brelse(bh);
+ spin_unlock(&jh->b_state_lock);
+ jbd2_journal_put_journal_head(jh);
if (drop_reserve) {
/* no need to reserve log space for this block -bzzz */
- handle->h_buffer_credits++;
+ handle->h_total_credits++;
}
return err;
-
-not_jbd:
- jbd_unlock_bh_state(bh);
- __bforget(bh);
- goto drop;
}
/**
@@ -1706,45 +1771,34 @@ int jbd2_journal_stop(handle_t *handle)
tid_t tid;
pid_t pid;
+ if (--handle->h_ref > 0) {
+ jbd_debug(4, "h_ref %d -> %d\n", handle->h_ref + 1,
+ handle->h_ref);
+ if (is_handle_aborted(handle))
+ return -EIO;
+ return 0;
+ }
if (!transaction) {
/*
- * Handle is already detached from the transaction so
- * there is nothing to do other than decrease a refcount,
- * or free the handle if refcount drops to zero
+ * Handle is already detached from the transaction so there is
+ * nothing to do other than free the handle.
*/
- if (--handle->h_ref > 0) {
- jbd_debug(4, "h_ref %d -> %d\n", handle->h_ref + 1,
- handle->h_ref);
- return err;
- } else {
- if (handle->h_rsv_handle)
- jbd2_free_handle(handle->h_rsv_handle);
- goto free_and_exit;
- }
+ memalloc_nofs_restore(handle->saved_alloc_context);
+ goto free_and_exit;
}
journal = transaction->t_journal;
-
- J_ASSERT(journal_current_handle() == handle);
+ tid = transaction->t_tid;
if (is_handle_aborted(handle))
err = -EIO;
- else
- J_ASSERT(atomic_read(&transaction->t_updates) > 0);
-
- if (--handle->h_ref > 0) {
- jbd_debug(4, "h_ref %d -> %d\n", handle->h_ref + 1,
- handle->h_ref);
- return err;
- }
jbd_debug(4, "Handle %p going down\n", handle);
trace_jbd2_handle_stats(journal->j_fs_dev->bd_dev,
- transaction->t_tid,
- handle->h_type, handle->h_line_no,
+ tid, handle->h_type, handle->h_line_no,
jiffies - handle->h_start_jiffies,
handle->h_sync, handle->h_requested_credits,
(handle->h_requested_credits -
- handle->h_buffer_credits));
+ handle->h_total_credits));
/*
* Implement synchronous transaction batching. If the handle
@@ -1804,19 +1858,13 @@ int jbd2_journal_stop(handle_t *handle)
if (handle->h_sync)
transaction->t_synchronous_commit = 1;
- current->journal_info = NULL;
- atomic_sub(handle->h_buffer_credits,
- &transaction->t_outstanding_credits);
/*
* If the handle is marked SYNC, we need to set another commit
- * going! We also want to force a commit if the current
- * transaction is occupying too much of the log, or if the
- * transaction is too old now.
+ * going! We also want to force a commit if the transaction is too
+ * old now.
*/
if (handle->h_sync ||
- (atomic_read(&transaction->t_outstanding_credits) >
- journal->j_max_transaction_buffers) ||
time_after_eq(jiffies, transaction->t_expires)) {
/* Do this even for aborted journals: an abort still
* completes the commit thread, it just doesn't write
@@ -1825,7 +1873,7 @@ int jbd2_journal_stop(handle_t *handle)
jbd_debug(2, "transaction too old, requesting commit for "
"handle %p\n", handle);
/* This is non-blocking */
- jbd2_log_start_commit(journal, transaction->t_tid);
+ jbd2_log_start_commit(journal, tid);
/*
* Special case: JBD2_SYNC synchronous updates require us
@@ -1836,31 +1884,19 @@ int jbd2_journal_stop(handle_t *handle)
}
/*
- * Once we drop t_updates, if it goes to zero the transaction
- * could start committing on us and eventually disappear. So
- * once we do this, we must not dereference transaction
- * pointer again.
+ * Once stop_this_handle() drops t_updates, the transaction could start
+ * committing on us and eventually disappear. So we must not
+ * dereference transaction pointer again after calling
+ * stop_this_handle().
*/
- tid = transaction->t_tid;
- if (atomic_dec_and_test(&transaction->t_updates)) {
- wake_up(&journal->j_wait_updates);
- if (journal->j_barrier_count)
- wake_up(&journal->j_wait_transaction_locked);
- }
-
- rwsem_release(&journal->j_trans_commit_map, _THIS_IP_);
+ stop_this_handle(handle);
if (wait_for_commit)
err = jbd2_log_wait_commit(journal, tid);
- if (handle->h_rsv_handle)
- jbd2_journal_free_reserved(handle->h_rsv_handle);
free_and_exit:
- /*
- * Scope of the GFP_NOFS context is over here and so we can restore the
- * original alloc context.
- */
- memalloc_nofs_restore(handle->saved_alloc_context);
+ if (handle->h_rsv_handle)
+ jbd2_free_handle(handle->h_rsv_handle);
jbd2_free_handle(handle);
return err;
}
@@ -1878,7 +1914,7 @@ free_and_exit:
*
* j_list_lock is held.
*
- * jbd_lock_bh_state(jh2bh(jh)) is held.
+ * jh->b_state_lock is held.
*/
static inline void
@@ -1902,7 +1938,7 @@ __blist_add_buffer(struct journal_head **list, struct journal_head *jh)
*
* Called with j_list_lock held, and the journal may not be locked.
*
- * jbd_lock_bh_state(jh2bh(jh)) is held.
+ * jh->b_state_lock is held.
*/
static inline void
@@ -1934,7 +1970,7 @@ static void __jbd2_journal_temp_unlink_buffer(struct journal_head *jh)
transaction_t *transaction;
struct buffer_head *bh = jh2bh(jh);
- J_ASSERT_JH(jh, jbd_is_locked_bh_state(bh));
+ lockdep_assert_held(&jh->b_state_lock);
transaction = jh->b_transaction;
if (transaction)
assert_spin_locked(&transaction->t_journal->j_list_lock);
@@ -1971,17 +2007,15 @@ static void __jbd2_journal_temp_unlink_buffer(struct journal_head *jh)
}
/*
- * Remove buffer from all transactions.
+ * Remove buffer from all transactions. The caller is responsible for dropping
+ * the jh reference that belonged to the transaction.
*
* Called with bh_state lock and j_list_lock
- *
- * jh and bh may be already freed when this function returns.
*/
static void __jbd2_journal_unfile_buffer(struct journal_head *jh)
{
__jbd2_journal_temp_unlink_buffer(jh);
jh->b_transaction = NULL;
- jbd2_journal_put_journal_head(jh);
}
void jbd2_journal_unfile_buffer(journal_t *journal, struct journal_head *jh)
@@ -1990,18 +2024,19 @@ void jbd2_journal_unfile_buffer(journal_t *journal, struct journal_head *jh)
/* Get reference so that buffer cannot be freed before we unlock it */
get_bh(bh);
- jbd_lock_bh_state(bh);
+ spin_lock(&jh->b_state_lock);
spin_lock(&journal->j_list_lock);
__jbd2_journal_unfile_buffer(jh);
spin_unlock(&journal->j_list_lock);
- jbd_unlock_bh_state(bh);
+ spin_unlock(&jh->b_state_lock);
+ jbd2_journal_put_journal_head(jh);
__brelse(bh);
}
/*
* Called from jbd2_journal_try_to_free_buffers().
*
- * Called under jbd_lock_bh_state(bh)
+ * Called under jh->b_state_lock
*/
static void
__journal_try_to_free_buffer(journal_t *journal, struct buffer_head *bh)
@@ -2088,10 +2123,10 @@ int jbd2_journal_try_to_free_buffers(journal_t *journal,
if (!jh)
continue;
- jbd_lock_bh_state(bh);
+ spin_lock(&jh->b_state_lock);
__journal_try_to_free_buffer(journal, bh);
+ spin_unlock(&jh->b_state_lock);
jbd2_journal_put_journal_head(jh);
- jbd_unlock_bh_state(bh);
if (buffer_jbd(bh))
goto busy;
} while ((bh = bh->b_this_page) != head);
@@ -2112,7 +2147,7 @@ busy:
*
* Called under j_list_lock.
*
- * Called under jbd_lock_bh_state(bh).
+ * Called under jh->b_state_lock.
*/
static int __dispose_buffer(struct journal_head *jh, transaction_t *transaction)
{
@@ -2133,6 +2168,7 @@ static int __dispose_buffer(struct journal_head *jh, transaction_t *transaction)
} else {
JBUFFER_TRACE(jh, "on running transaction");
__jbd2_journal_unfile_buffer(jh);
+ jbd2_journal_put_journal_head(jh);
}
return may_free;
}
@@ -2199,18 +2235,15 @@ static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh,
* holding the page lock. --sct
*/
- if (!buffer_jbd(bh))
+ jh = jbd2_journal_grab_journal_head(bh);
+ if (!jh)
goto zap_buffer_unlocked;
/* OK, we have data buffer in journaled mode */
write_lock(&journal->j_state_lock);
- jbd_lock_bh_state(bh);
+ spin_lock(&jh->b_state_lock);
spin_lock(&journal->j_list_lock);
- jh = jbd2_journal_grab_journal_head(bh);
- if (!jh)
- goto zap_buffer_no_jh;
-
/*
* We cannot remove the buffer from checkpoint lists until the
* transaction adding inode to orphan list (let's call it T)
@@ -2289,10 +2322,10 @@ static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh,
* for commit and try again.
*/
if (partial_page) {
- jbd2_journal_put_journal_head(jh);
spin_unlock(&journal->j_list_lock);
- jbd_unlock_bh_state(bh);
+ spin_unlock(&jh->b_state_lock);
write_unlock(&journal->j_state_lock);
+ jbd2_journal_put_journal_head(jh);
return -EBUSY;
}
/*
@@ -2304,10 +2337,10 @@ static int journal_unmap_buffer(journal_t *journal, struct buffer_head *bh,
set_buffer_freed(bh);
if (journal->j_running_transaction && buffer_jbddirty(bh))
jh->b_next_transaction = journal->j_running_transaction;
- jbd2_journal_put_journal_head(jh);
spin_unlock(&journal->j_list_lock);
- jbd_unlock_bh_state(bh);
+ spin_unlock(&jh->b_state_lock);
write_unlock(&journal->j_state_lock);
+ jbd2_journal_put_journal_head(jh);
return 0;
} else {
/* Good, the buffer belongs to the running transaction.
@@ -2331,11 +2364,10 @@ zap_buffer:
* here.
*/
jh->b_modified = 0;
- jbd2_journal_put_journal_head(jh);
-zap_buffer_no_jh:
spin_unlock(&journal->j_list_lock);
- jbd_unlock_bh_state(bh);
+ spin_unlock(&jh->b_state_lock);
write_unlock(&journal->j_state_lock);
+ jbd2_journal_put_journal_head(jh);
zap_buffer_unlocked:
clear_buffer_dirty(bh);
J_ASSERT_BH(bh, !buffer_jbddirty(bh));
@@ -2422,7 +2454,7 @@ void __jbd2_journal_file_buffer(struct journal_head *jh,
int was_dirty = 0;
struct buffer_head *bh = jh2bh(jh);
- J_ASSERT_JH(jh, jbd_is_locked_bh_state(bh));
+ lockdep_assert_held(&jh->b_state_lock);
assert_spin_locked(&transaction->t_journal->j_list_lock);
J_ASSERT_JH(jh, jh->b_jlist < BJ_Types);
@@ -2484,11 +2516,11 @@ void __jbd2_journal_file_buffer(struct journal_head *jh,
void jbd2_journal_file_buffer(struct journal_head *jh,
transaction_t *transaction, int jlist)
{
- jbd_lock_bh_state(jh2bh(jh));
+ spin_lock(&jh->b_state_lock);
spin_lock(&transaction->t_journal->j_list_lock);
__jbd2_journal_file_buffer(jh, transaction, jlist);
spin_unlock(&transaction->t_journal->j_list_lock);
- jbd_unlock_bh_state(jh2bh(jh));
+ spin_unlock(&jh->b_state_lock);
}
/*
@@ -2498,23 +2530,25 @@ void jbd2_journal_file_buffer(struct journal_head *jh,
* buffer on that transaction's metadata list.
*
* Called under j_list_lock
- * Called under jbd_lock_bh_state(jh2bh(jh))
+ * Called under jh->b_state_lock
*
- * jh and bh may be already free when this function returns
+ * When this function returns true, there's no next transaction to refile to
+ * and the caller has to drop jh reference through
+ * jbd2_journal_put_journal_head().
*/
-void __jbd2_journal_refile_buffer(struct journal_head *jh)
+bool __jbd2_journal_refile_buffer(struct journal_head *jh)
{
int was_dirty, jlist;
struct buffer_head *bh = jh2bh(jh);
- J_ASSERT_JH(jh, jbd_is_locked_bh_state(bh));
+ lockdep_assert_held(&jh->b_state_lock);
if (jh->b_transaction)
assert_spin_locked(&jh->b_transaction->t_journal->j_list_lock);
/* If the buffer is now unused, just drop it. */
if (jh->b_next_transaction == NULL) {
__jbd2_journal_unfile_buffer(jh);
- return;
+ return true;
}
/*
@@ -2542,6 +2576,7 @@ void __jbd2_journal_refile_buffer(struct journal_head *jh)
if (was_dirty)
set_buffer_jbddirty(bh);
+ return false;
}
/*
@@ -2552,16 +2587,15 @@ void __jbd2_journal_refile_buffer(struct journal_head *jh)
*/
void jbd2_journal_refile_buffer(journal_t *journal, struct journal_head *jh)
{
- struct buffer_head *bh = jh2bh(jh);
+ bool drop;
- /* Get reference so that buffer cannot be freed before we unlock it */
- get_bh(bh);
- jbd_lock_bh_state(bh);
+ spin_lock(&jh->b_state_lock);
spin_lock(&journal->j_list_lock);
- __jbd2_journal_refile_buffer(jh);
- jbd_unlock_bh_state(bh);
+ drop = __jbd2_journal_refile_buffer(jh);
+ spin_unlock(&jh->b_state_lock);
spin_unlock(&journal->j_list_lock);
- __brelse(bh);
+ if (drop)
+ jbd2_journal_put_journal_head(jh);
}
/*
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-12 03:47:03 +0000