This will clean up nilfs_segctor_req struct and the obscure request
argument passed among private methods of segment constructor.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxxxxxx>
---
fs/nilfs2/segment.c | 79 ++++++++++++++++++++++++--------------------------
fs/nilfs2/segment.h | 2 +
2 files changed, 40 insertions(+), 41 deletions(-)
diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index ab439a7..fa4abfc 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -2425,43 +2425,43 @@ int nilfs_construct_dsync_segment(struct super_block *sb, struct inode *inode,
return err;
}
-struct nilfs_segctor_req {
- int mode;
- __u32 seq_accepted;
- int sc_err; /* construction failure */
- int sb_err; /* super block writeback failure */
-};
-
#define FLUSH_FILE_BIT (0x1) /* data file only */
#define FLUSH_DAT_BIT (1 << NILFS_DAT_INO) /* DAT only */
-static void nilfs_segctor_accept(struct nilfs_sc_info *sci,
- struct nilfs_segctor_req *req)
+/**
+ * nilfs_segctor_accept - record accepted sequence count of log-write requests
+ * @sci: segment constructor object
+ */
+static void nilfs_segctor_accept(struct nilfs_sc_info *sci)
{
- req->sc_err = req->sb_err = 0;
spin_lock(&sci->sc_state_lock);
- req->seq_accepted = sci->sc_seq_request;
+ sci->sc_seq_accepted = sci->sc_seq_request;
spin_unlock(&sci->sc_state_lock);
if (sci->sc_timer)
del_timer_sync(sci->sc_timer);
}
-static void nilfs_segctor_notify(struct nilfs_sc_info *sci,
- struct nilfs_segctor_req *req)
+/**
+ * nilfs_segctor_notify - notify the result of request to caller threads
+ * @sci: segment constructor object
+ * @mode: mode of log forming
+ * @err: error code to be notified
+ */
+static void nilfs_segctor_notify(struct nilfs_sc_info *sci, int mode, int err)
{
/* Clear requests (even when the construction failed) */
spin_lock(&sci->sc_state_lock);
- if (req->mode == SC_LSEG_SR) {
+ if (mode == SC_LSEG_SR) {
sci->sc_state &= ~NILFS_SEGCTOR_COMMIT;
- sci->sc_seq_done = req->seq_accepted;
- nilfs_segctor_wakeup(sci, req->sc_err ? : req->sb_err);
+ sci->sc_seq_done = sci->sc_seq_accepted;
+ nilfs_segctor_wakeup(sci, err);
sci->sc_flush_request = 0;
} else {
- if (req->mode == SC_FLUSH_FILE)
+ if (mode == SC_FLUSH_FILE)
sci->sc_flush_request &= ~FLUSH_FILE_BIT;
- else if (req->mode == SC_FLUSH_DAT)
+ else if (mode == SC_FLUSH_DAT)
sci->sc_flush_request &= ~FLUSH_DAT_BIT;
/* re-enable timer if checkpoint creation was not done */
@@ -2472,30 +2472,37 @@ static void nilfs_segctor_notify(struct nilfs_sc_info *sci,
spin_unlock(&sci->sc_state_lock);
}
-static int nilfs_segctor_construct(struct nilfs_sc_info *sci,
- struct nilfs_segctor_req *req)
+/**
+ * nilfs_segctor_construct - form logs and write them to disk
+ * @sci: segment constructor object
+ * @mode: mode of log forming
+ */
+static int nilfs_segctor_construct(struct nilfs_sc_info *sci, int mode)
{
struct nilfs_sb_info *sbi = sci->sc_sbi;
struct the_nilfs *nilfs = sbi->s_nilfs;
int err = 0;
+ nilfs_segctor_accept(sci);
+
if (nilfs_discontinued(nilfs))
- req->mode = SC_LSEG_SR;
- if (!nilfs_segctor_confirm(sci)) {
- err = nilfs_segctor_do_construct(sci, req->mode);
- req->sc_err = err;
- }
+ mode = SC_LSEG_SR;
+ if (!nilfs_segctor_confirm(sci))
+ err = nilfs_segctor_do_construct(sci, mode);
+
if (likely(!err)) {
- if (req->mode != SC_FLUSH_DAT)
+ if (mode != SC_FLUSH_DAT)
atomic_set(&nilfs->ns_ndirtyblks, 0);
if (test_bit(NILFS_SC_SUPER_ROOT, &sci->sc_flags) &&
nilfs_discontinued(nilfs)) {
down_write(&nilfs->ns_sem);
- req->sb_err = nilfs_commit_super(sbi,
- nilfs_altsb_need_update(nilfs));
+ err = nilfs_commit_super(
+ sbi, nilfs_altsb_need_update(nilfs));
up_write(&nilfs->ns_sem);
}
}
+
+ nilfs_segctor_notify(sci, mode, err);
return err;
}
@@ -2526,7 +2533,6 @@ int nilfs_clean_segments(struct super_block *sb, struct nilfs_argv *argv,
struct nilfs_sc_info *sci = NILFS_SC(sbi);
struct the_nilfs *nilfs = sbi->s_nilfs;
struct nilfs_transaction_info ti;
- struct nilfs_segctor_req req = { .mode = SC_LSEG_SR };
int err;
if (unlikely(!sci))
@@ -2547,10 +2553,8 @@ int nilfs_clean_segments(struct super_block *sb, struct nilfs_argv *argv,
list_splice_tail_init(&nilfs->ns_gc_inodes, &sci->sc_gc_inodes);
for (;;) {
- nilfs_segctor_accept(sci, &req);
- err = nilfs_segctor_construct(sci, &req);
+ err = nilfs_segctor_construct(sci, SC_LSEG_SR);
nilfs_remove_written_gcinodes(nilfs, &sci->sc_gc_inodes);
- nilfs_segctor_notify(sci, &req);
if (likely(!err))
break;
@@ -2583,13 +2587,9 @@ static void nilfs_segctor_thread_construct(struct nilfs_sc_info *sci, int mode)
{
struct nilfs_sb_info *sbi = sci->sc_sbi;
struct nilfs_transaction_info ti;
- struct nilfs_segctor_req req = { .mode = mode };
nilfs_transaction_lock(sbi, &ti, 0);
-
- nilfs_segctor_accept(sci, &req);
- nilfs_segctor_construct(sci, &req);
- nilfs_segctor_notify(sci, &req);
+ nilfs_segctor_construct(sci, mode);
/*
* Unclosed segment should be retried. We do this using sc_timer.
@@ -2807,12 +2807,9 @@ static void nilfs_segctor_write_out(struct nilfs_sc_info *sci)
do {
struct nilfs_sb_info *sbi = sci->sc_sbi;
struct nilfs_transaction_info ti;
- struct nilfs_segctor_req req = { .mode = SC_LSEG_SR };
nilfs_transaction_lock(sbi, &ti, 0);
- nilfs_segctor_accept(sci, &req);
- ret = nilfs_segctor_construct(sci, &req);
- nilfs_segctor_notify(sci, &req);
+ ret = nilfs_segctor_construct(sci, SC_LSEG_SR);
nilfs_transaction_unlock(sbi);
} while (ret && retrycount-- > 0);
diff --git a/fs/nilfs2/segment.h b/fs/nilfs2/segment.h
index 3d3ab2f..3155e0c 100644
--- a/fs/nilfs2/segment.h
+++ b/fs/nilfs2/segment.h
@@ -116,6 +116,7 @@ struct nilfs_segsum_pointer {
* @sc_wait_daemon: Daemon wait queue
* @sc_wait_task: Start/end wait queue to control segctord task
* @sc_seq_request: Request counter
+ * @sc_seq_accept: Accepted request count
* @sc_seq_done: Completion counter
* @sc_sync: Request of explicit sync operation
* @sc_interval: Timeout value of background construction
@@ -169,6 +170,7 @@ struct nilfs_sc_info {
wait_queue_head_t sc_wait_task;
__u32 sc_seq_request;
+ __u32 sc_seq_accepted;
__u32 sc_seq_done;
int sc_sync;
--
1.6.3.4
--
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