[PATCH 1/6] f2fs: clean up flush/discard command namings
From: Jaegeuk Kim
Date: Thu Jan 12 2017 - 17:44:17 EST
This patch simply cleans up the names for flush/discard commands.
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
---
fs/f2fs/debug.c | 2 +-
fs/f2fs/f2fs.h | 20 +++++-------
fs/f2fs/segment.c | 98 +++++++++++++++++++++++++++----------------------------
3 files changed, 59 insertions(+), 61 deletions(-)
diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index 29cdf0c1da1d..883f1ea9e0b6 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -194,7 +194,7 @@ static void update_mem_info(struct f2fs_sb_info *sbi)
si->cache_mem += sizeof(struct f2fs_gc_kthread);
/* build merge flush thread */
- if (SM_I(sbi)->cmd_control_info)
+ if (SM_I(sbi)->fcc_info)
si->cache_mem += sizeof(struct flush_cmd_control);
/* free nids */
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 4a84b3fbbfd1..548e75d18ec1 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -181,13 +181,12 @@ struct discard_entry {
int len; /* # of consecutive blocks of the discard */
};
-struct bio_entry {
- struct list_head list;
- block_t lstart;
- block_t len;
- struct bio *bio;
- struct completion event;
- int error;
+struct discard_cmd {
+ struct list_head list; /* command list */
+ struct completion wait; /* compleation */
+ block_t lstart; /* logical start address */
+ block_t len; /* length */
+ struct bio *bio; /* bio */
};
/* for the list of fsync inodes, used only during recovery */
@@ -634,8 +633,8 @@ struct f2fs_sm_info {
unsigned int rec_prefree_segments;
/* for small discard management */
- struct list_head discard_list; /* 4KB discard list */
- struct list_head wait_list; /* linked with issued discard bio */
+ struct list_head discard_entry_list; /* 4KB discard entry list */
+ struct list_head discard_cmd_list; /* discard cmd list */
int nr_discards; /* # of discards in the list */
int max_discards; /* max. discards to be issued */
@@ -649,8 +648,7 @@ struct f2fs_sm_info {
unsigned int min_fsync_blocks; /* threshold for fsync */
/* for flush command control */
- struct flush_cmd_control *cmd_control_info;
-
+ struct flush_cmd_control *fcc_info;
};
/*
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 40fd04e1e23d..73282108fa33 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -26,7 +26,7 @@
#define __reverse_ffz(x) __reverse_ffs(~(x))
static struct kmem_cache *discard_entry_slab;
-static struct kmem_cache *bio_entry_slab;
+static struct kmem_cache *discard_cmd_slab;
static struct kmem_cache *sit_entry_set_slab;
static struct kmem_cache *inmem_entry_slab;
@@ -439,7 +439,7 @@ static int submit_flush_wait(struct f2fs_sb_info *sbi)
static int issue_flush_thread(void *data)
{
struct f2fs_sb_info *sbi = data;
- struct flush_cmd_control *fcc = SM_I(sbi)->cmd_control_info;
+ struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info;
wait_queue_head_t *q = &fcc->flush_wait_queue;
repeat:
if (kthread_should_stop())
@@ -468,7 +468,7 @@ static int issue_flush_thread(void *data)
int f2fs_issue_flush(struct f2fs_sb_info *sbi)
{
- struct flush_cmd_control *fcc = SM_I(sbi)->cmd_control_info;
+ struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info;
struct flush_cmd cmd;
trace_f2fs_issue_flush(sbi->sb, test_opt(sbi, NOBARRIER),
@@ -511,8 +511,8 @@ int create_flush_cmd_control(struct f2fs_sb_info *sbi)
struct flush_cmd_control *fcc;
int err = 0;
- if (SM_I(sbi)->cmd_control_info) {
- fcc = SM_I(sbi)->cmd_control_info;
+ if (SM_I(sbi)->fcc_info) {
+ fcc = SM_I(sbi)->fcc_info;
goto init_thread;
}
@@ -522,14 +522,14 @@ int create_flush_cmd_control(struct f2fs_sb_info *sbi)
atomic_set(&fcc->submit_flush, 0);
init_waitqueue_head(&fcc->flush_wait_queue);
init_llist_head(&fcc->issue_list);
- SM_I(sbi)->cmd_control_info = fcc;
+ SM_I(sbi)->fcc_info = fcc;
init_thread:
fcc->f2fs_issue_flush = kthread_run(issue_flush_thread, sbi,
"f2fs_flush-%u:%u", MAJOR(dev), MINOR(dev));
if (IS_ERR(fcc->f2fs_issue_flush)) {
err = PTR_ERR(fcc->f2fs_issue_flush);
kfree(fcc);
- SM_I(sbi)->cmd_control_info = NULL;
+ SM_I(sbi)->fcc_info = NULL;
return err;
}
@@ -538,7 +538,7 @@ int create_flush_cmd_control(struct f2fs_sb_info *sbi)
void destroy_flush_cmd_control(struct f2fs_sb_info *sbi, bool free)
{
- struct flush_cmd_control *fcc = SM_I(sbi)->cmd_control_info;
+ struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info;
if (fcc && fcc->f2fs_issue_flush) {
struct task_struct *flush_thread = fcc->f2fs_issue_flush;
@@ -548,7 +548,7 @@ void destroy_flush_cmd_control(struct f2fs_sb_info *sbi, bool free)
}
if (free) {
kfree(fcc);
- SM_I(sbi)->cmd_control_info = NULL;
+ SM_I(sbi)->fcc_info = NULL;
}
}
@@ -628,42 +628,43 @@ static void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno)
mutex_unlock(&dirty_i->seglist_lock);
}
-static struct bio_entry *__add_bio_entry(struct f2fs_sb_info *sbi,
+static struct discard_cmd *__add_discard_cmd(struct f2fs_sb_info *sbi,
struct bio *bio, block_t lstart, block_t len)
{
- struct list_head *wait_list = &(SM_I(sbi)->wait_list);
- struct bio_entry *be = f2fs_kmem_cache_alloc(bio_entry_slab, GFP_NOFS);
+ struct list_head *wait_list = &(SM_I(sbi)->discard_cmd_list);
+ struct discard_cmd *dc;
- INIT_LIST_HEAD(&be->list);
- be->bio = bio;
- be->lstart = lstart;
- be->len = len;
- init_completion(&be->event);
- list_add_tail(&be->list, wait_list);
+ dc = f2fs_kmem_cache_alloc(discard_cmd_slab, GFP_NOFS);
+ INIT_LIST_HEAD(&dc->list);
+ dc->bio = bio;
+ dc->lstart = lstart;
+ dc->len = len;
+ init_completion(&dc->wait);
+ list_add_tail(&dc->list, wait_list);
- return be;
+ return dc;
}
/* This should be covered by global mutex, &sit_i->sentry_lock */
void f2fs_wait_discard_bio(struct f2fs_sb_info *sbi, block_t blkaddr)
{
- struct list_head *wait_list = &(SM_I(sbi)->wait_list);
- struct bio_entry *be, *tmp;
+ struct list_head *wait_list = &(SM_I(sbi)->discard_cmd_list);
+ struct discard_cmd *dc, *tmp;
- list_for_each_entry_safe(be, tmp, wait_list, list) {
- struct bio *bio = be->bio;
+ list_for_each_entry_safe(dc, tmp, wait_list, list) {
+ struct bio *bio = dc->bio;
int err;
- if (!completion_done(&be->event)) {
- if ((be->lstart <= blkaddr &&
- blkaddr < be->lstart + be->len) ||
+ if (!completion_done(&dc->wait)) {
+ if ((dc->lstart <= blkaddr &&
+ blkaddr < dc->lstart + dc->len) ||
blkaddr == NULL_ADDR)
- wait_for_completion_io(&be->event);
+ wait_for_completion_io(&dc->wait);
else
continue;
}
- err = be->error;
+ err = bio->bi_error;
if (err == -EOPNOTSUPP)
err = 0;
@@ -672,17 +673,16 @@ void f2fs_wait_discard_bio(struct f2fs_sb_info *sbi, block_t blkaddr)
"Issue discard failed, ret: %d", err);
bio_put(bio);
- list_del(&be->list);
- kmem_cache_free(bio_entry_slab, be);
+ list_del(&dc->list);
+ kmem_cache_free(discard_cmd_slab, dc);
}
}
-static void f2fs_submit_bio_wait_endio(struct bio *bio)
+static void f2fs_submit_discard_endio(struct bio *bio)
{
- struct bio_entry *be = (struct bio_entry *)bio->bi_private;
+ struct discard_cmd *dc = (struct discard_cmd *)bio->bi_private;
- be->error = bio->bi_error;
- complete(&be->event);
+ complete(&dc->wait);
}
/* this function is copied from blkdev_issue_discard from block/blk-lib.c */
@@ -705,11 +705,11 @@ static int __f2fs_issue_discard_async(struct f2fs_sb_info *sbi,
SECTOR_FROM_BLOCK(blklen),
GFP_NOFS, 0, &bio);
if (!err && bio) {
- struct bio_entry *be = __add_bio_entry(sbi, bio,
+ struct discard_cmd *dc = __add_discard_cmd(sbi, bio,
lblkstart, blklen);
- bio->bi_private = be;
- bio->bi_end_io = f2fs_submit_bio_wait_endio;
+ bio->bi_private = dc;
+ bio->bi_end_io = f2fs_submit_discard_endio;
bio->bi_opf |= REQ_SYNC;
submit_bio(bio);
}
@@ -817,7 +817,7 @@ static void __add_discard_entry(struct f2fs_sb_info *sbi,
struct cp_control *cpc, struct seg_entry *se,
unsigned int start, unsigned int end)
{
- struct list_head *head = &SM_I(sbi)->discard_list;
+ struct list_head *head = &SM_I(sbi)->discard_entry_list;
struct discard_entry *new, *last;
if (!list_empty(head)) {
@@ -886,7 +886,7 @@ static bool add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc,
void release_discard_addrs(struct f2fs_sb_info *sbi)
{
- struct list_head *head = &(SM_I(sbi)->discard_list);
+ struct list_head *head = &(SM_I(sbi)->discard_entry_list);
struct discard_entry *entry, *this;
/* drop caches */
@@ -912,7 +912,7 @@ static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi)
void clear_prefree_segments(struct f2fs_sb_info *sbi, struct cp_control *cpc)
{
- struct list_head *head = &(SM_I(sbi)->discard_list);
+ struct list_head *head = &(SM_I(sbi)->discard_entry_list);
struct discard_entry *entry, *this;
struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
struct blk_plug plug;
@@ -2703,8 +2703,8 @@ int build_segment_manager(struct f2fs_sb_info *sbi)
sm_info->min_ipu_util = DEF_MIN_IPU_UTIL;
sm_info->min_fsync_blocks = DEF_MIN_FSYNC_BLOCKS;
- INIT_LIST_HEAD(&sm_info->discard_list);
- INIT_LIST_HEAD(&sm_info->wait_list);
+ INIT_LIST_HEAD(&sm_info->discard_entry_list);
+ INIT_LIST_HEAD(&sm_info->discard_cmd_list);
sm_info->nr_discards = 0;
sm_info->max_discards = 0;
@@ -2854,15 +2854,15 @@ int __init create_segment_manager_caches(void)
if (!discard_entry_slab)
goto fail;
- bio_entry_slab = f2fs_kmem_cache_create("bio_entry",
- sizeof(struct bio_entry));
- if (!bio_entry_slab)
+ discard_cmd_slab = f2fs_kmem_cache_create("discard_cmd",
+ sizeof(struct discard_cmd));
+ if (!discard_cmd_slab)
goto destroy_discard_entry;
sit_entry_set_slab = f2fs_kmem_cache_create("sit_entry_set",
sizeof(struct sit_entry_set));
if (!sit_entry_set_slab)
- goto destroy_bio_entry;
+ goto destroy_discard_cmd;
inmem_entry_slab = f2fs_kmem_cache_create("inmem_page_entry",
sizeof(struct inmem_pages));
@@ -2872,8 +2872,8 @@ int __init create_segment_manager_caches(void)
destroy_sit_entry_set:
kmem_cache_destroy(sit_entry_set_slab);
-destroy_bio_entry:
- kmem_cache_destroy(bio_entry_slab);
+destroy_discard_cmd:
+ kmem_cache_destroy(discard_cmd_slab);
destroy_discard_entry:
kmem_cache_destroy(discard_entry_slab);
fail:
@@ -2883,7 +2883,7 @@ int __init create_segment_manager_caches(void)
void destroy_segment_manager_caches(void)
{
kmem_cache_destroy(sit_entry_set_slab);
- kmem_cache_destroy(bio_entry_slab);
+ kmem_cache_destroy(discard_cmd_slab);
kmem_cache_destroy(discard_entry_slab);
kmem_cache_destroy(inmem_entry_slab);
}
--
2.11.0