nilfs2: move log writer onto nilfs object
Log writer is held by the nilfs_sb_info structure. This moves it into
nilfs object and replaces all uses of NILFS_SC() accessor.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
diff --git a/fs/nilfs2/sb.h b/fs/nilfs2/sb.h
index 6f190df..44553f4 100644
--- a/fs/nilfs2/sb.h
+++ b/fs/nilfs2/sb.h
@@ -28,7 +28,6 @@
#include <linux/fs.h>
struct the_nilfs;
-struct nilfs_sc_info;
/*
* NILFS super-block data in memory
@@ -37,9 +36,6 @@
/* Fundamental members */
struct super_block *s_super; /* reverse pointer to super_block */
struct the_nilfs *s_nilfs;
-
- /* Segment constructor */
- struct nilfs_sc_info *s_sc_info; /* segment constructor info */
};
static inline struct nilfs_sb_info *NILFS_SB(struct super_block *sb)
@@ -47,9 +43,4 @@
return sb->s_fs_info;
}
-static inline struct nilfs_sc_info *NILFS_SC(struct nilfs_sb_info *sbi)
-{
- return sbi->s_sc_info;
-}
-
#endif /* _NILFS_SB */
diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index 6ac50d8..e3d1785 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -224,8 +224,7 @@
int nilfs_transaction_commit(struct super_block *sb)
{
struct nilfs_transaction_info *ti = current->journal_info;
- struct nilfs_sb_info *sbi;
- struct nilfs_sc_info *sci;
+ struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
int err = 0;
BUG_ON(ti == NULL || ti->ti_magic != NILFS_TI_MAGIC);
@@ -234,16 +233,15 @@
ti->ti_count--;
return 0;
}
- sbi = NILFS_SB(sb);
- sci = NILFS_SC(sbi);
- if (sci != NULL) {
+ if (nilfs->ns_writer) {
+ struct nilfs_sc_info *sci = nilfs->ns_writer;
+
if (ti->ti_flags & NILFS_TI_COMMIT)
nilfs_segctor_start_timer(sci);
- if (atomic_read(&sbi->s_nilfs->ns_ndirtyblks) >
- sci->sc_watermark)
+ if (atomic_read(&nilfs->ns_ndirtyblks) > sci->sc_watermark)
nilfs_segctor_do_flush(sci, 0);
}
- up_read(&sbi->s_nilfs->ns_segctor_sem);
+ up_read(&nilfs->ns_segctor_sem);
current->journal_info = ti->ti_save;
if (ti->ti_flags & NILFS_TI_SYNC)
@@ -271,9 +269,8 @@
void nilfs_relax_pressure_in_lock(struct super_block *sb)
{
- struct nilfs_sb_info *sbi = NILFS_SB(sb);
- struct nilfs_sc_info *sci = NILFS_SC(sbi);
- struct the_nilfs *nilfs = sbi->s_nilfs;
+ struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
+ struct nilfs_sc_info *sci = nilfs->ns_writer;
if (!sci || !sci->sc_flush_request)
return;
@@ -298,6 +295,8 @@
int gcflag)
{
struct nilfs_transaction_info *cur_ti = current->journal_info;
+ struct the_nilfs *nilfs = sbi->s_nilfs;
+ struct nilfs_sc_info *sci = nilfs->ns_writer;
WARN_ON(cur_ti);
ti->ti_flags = NILFS_TI_WRITER;
@@ -308,11 +307,11 @@
current->journal_info = ti;
for (;;) {
- down_write(&sbi->s_nilfs->ns_segctor_sem);
- if (!test_bit(NILFS_SC_PRIOR_FLUSH, &NILFS_SC(sbi)->sc_flags))
+ down_write(&nilfs->ns_segctor_sem);
+ if (!test_bit(NILFS_SC_PRIOR_FLUSH, &sci->sc_flags))
break;
- nilfs_segctor_do_immediate_flush(NILFS_SC(sbi));
+ nilfs_segctor_do_immediate_flush(sci);
up_write(&sbi->s_nilfs->ns_segctor_sem);
yield();
@@ -2169,8 +2168,8 @@
*/
void nilfs_flush_segment(struct super_block *sb, ino_t ino)
{
- struct nilfs_sb_info *sbi = NILFS_SB(sb);
- struct nilfs_sc_info *sci = NILFS_SC(sbi);
+ struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
+ struct nilfs_sc_info *sci = nilfs->ns_writer;
if (!sci || nilfs_doing_construction())
return;
@@ -2259,8 +2258,8 @@
*/
int nilfs_construct_segment(struct super_block *sb)
{
- struct nilfs_sb_info *sbi = NILFS_SB(sb);
- struct nilfs_sc_info *sci = NILFS_SC(sbi);
+ struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs;
+ struct nilfs_sc_info *sci = nilfs->ns_writer;
struct nilfs_transaction_info *ti;
int err;
@@ -2299,7 +2298,7 @@
{
struct nilfs_sb_info *sbi = NILFS_SB(sb);
struct the_nilfs *nilfs = sbi->s_nilfs;
- struct nilfs_sc_info *sci = NILFS_SC(sbi);
+ struct nilfs_sc_info *sci = nilfs->ns_writer;
struct nilfs_inode_info *ii;
struct nilfs_transaction_info ti;
int err = 0;
@@ -2445,8 +2444,8 @@
void **kbufs)
{
struct nilfs_sb_info *sbi = NILFS_SB(sb);
- struct nilfs_sc_info *sci = NILFS_SC(sbi);
struct the_nilfs *nilfs = sbi->s_nilfs;
+ struct nilfs_sc_info *sci = nilfs->ns_writer;
struct nilfs_transaction_info ti;
int err;
@@ -2787,9 +2786,10 @@
int nilfs_attach_segment_constructor(struct nilfs_sb_info *sbi,
struct nilfs_root *root)
{
+ struct the_nilfs *nilfs = sbi->s_nilfs;
int err;
- if (NILFS_SC(sbi)) {
+ if (nilfs->ns_writer) {
/*
* This happens if the filesystem was remounted
* read/write after nilfs_error degenerated it into a
@@ -2798,14 +2798,14 @@
nilfs_detach_segment_constructor(sbi);
}
- sbi->s_sc_info = nilfs_segctor_new(sbi, root);
- if (!sbi->s_sc_info)
+ nilfs->ns_writer = nilfs_segctor_new(sbi, root);
+ if (!nilfs->ns_writer)
return -ENOMEM;
- err = nilfs_segctor_start_thread(NILFS_SC(sbi));
+ err = nilfs_segctor_start_thread(nilfs->ns_writer);
if (err) {
- kfree(sbi->s_sc_info);
- sbi->s_sc_info = NULL;
+ kfree(nilfs->ns_writer);
+ nilfs->ns_writer = NULL;
}
return err;
}
@@ -2823,9 +2823,9 @@
LIST_HEAD(garbage_list);
down_write(&nilfs->ns_segctor_sem);
- if (NILFS_SC(sbi)) {
- nilfs_segctor_destroy(NILFS_SC(sbi));
- sbi->s_sc_info = NULL;
+ if (nilfs->ns_writer) {
+ nilfs_segctor_destroy(nilfs->ns_writer);
+ nilfs->ns_writer = NULL;
}
/* Force to free the list of dirty files */
diff --git a/fs/nilfs2/the_nilfs.h b/fs/nilfs2/the_nilfs.h
index 3ecc968f..10521b9 100644
--- a/fs/nilfs2/the_nilfs.h
+++ b/fs/nilfs2/the_nilfs.h
@@ -33,6 +33,8 @@
#include <linux/slab.h>
#include "sb.h"
+struct nilfs_sc_info;
+
/* the_nilfs struct */
enum {
THE_NILFS_INIT = 0, /* Information from super_block is set */
@@ -65,7 +67,8 @@
* @ns_last_cno: checkpoint number of the latest segment
* @ns_prot_seq: least sequence number of segments which must not be reclaimed
* @ns_prev_seq: base sequence number used to decide if advance log cursor
- * @ns_segctor_sem: segment constructor semaphore
+ * @ns_writer: log writer
+ * @ns_segctor_sem: semaphore protecting log write
* @ns_dat: DAT file inode
* @ns_cpfile: checkpoint file inode
* @ns_sufile: segusage file inode
@@ -140,6 +143,7 @@
u64 ns_prot_seq;
u64 ns_prev_seq;
+ struct nilfs_sc_info *ns_writer;
struct rw_semaphore ns_segctor_sem;
/*
