[PATCH 1/6] f2fs: use f2fs_io_info to clean up messy parameters during IO path

From: Jaegeuk Kim
Date: Sun Dec 21 2014 - 11:35:38 EST

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This patch cleans up parameters on IO paths.
The key idea is to use f2fs_io_info adding a parameter, block address, and then
use this structure as parameters.

Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
---
fs/f2fs/checkpoint.c | 24 ++++++++++---------
fs/f2fs/data.c | 66 +++++++++++++++++++++++++++++++---------------------
fs/f2fs/f2fs.h | 14 ++++++-----
fs/f2fs/inline.c | 7 +++---
fs/f2fs/node.c | 14 +++++++----
fs/f2fs/segment.c | 28 +++++++++++-----------
6 files changed, 87 insertions(+), 66 deletions(-)

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 825158e..0ac7c39 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -50,6 +50,11 @@ struct page *get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
{
struct address_space *mapping = META_MAPPING(sbi);
struct page *page;
+ struct f2fs_io_info fio = {
+ .type = META,
+ .rw = READ_SYNC | REQ_META | REQ_PRIO,
+ .blk_addr = index,
+ };
repeat:
page = grab_cache_page(mapping, index);
if (!page) {
@@ -59,8 +64,7 @@ repeat:
if (PageUptodate(page))
goto out;

- if (f2fs_submit_page_bio(sbi, page, index,
- READ_SYNC | REQ_META | REQ_PRIO))
+ if (f2fs_submit_page_bio(sbi, page, &fio))
goto repeat;

lock_page(page);
@@ -112,14 +116,12 @@ int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages, int type
block_t prev_blk_addr = 0;
struct page *page;
block_t blkno = start;
-
struct f2fs_io_info fio = {
.type = META,
.rw = READ_SYNC | REQ_META | REQ_PRIO
};

for (; nrpages-- > 0; blkno++) {
- block_t blk_addr;

if (!is_valid_blkaddr(sbi, blkno, type))
goto out;
@@ -130,27 +132,27 @@ int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages, int type
NAT_BLOCK_OFFSET(NM_I(sbi)->max_nid)))
blkno = 0;
/* get nat block addr */
- blk_addr = current_nat_addr(sbi,
+ fio.blk_addr = current_nat_addr(sbi,
blkno * NAT_ENTRY_PER_BLOCK);
break;
case META_SIT:
/* get sit block addr */
- blk_addr = current_sit_addr(sbi,
+ fio.blk_addr = current_sit_addr(sbi,
blkno * SIT_ENTRY_PER_BLOCK);
- if (blkno != start && prev_blk_addr + 1 != blk_addr)
+ if (blkno != start && prev_blk_addr + 1 != fio.blk_addr)
goto out;
- prev_blk_addr = blk_addr;
+ prev_blk_addr = fio.blk_addr;
break;
case META_SSA:
case META_CP:
case META_POR:
- blk_addr = blkno;
+ fio.blk_addr = blkno;
break;
default:
BUG();
}

- page = grab_cache_page(META_MAPPING(sbi), blk_addr);
+ page = grab_cache_page(META_MAPPING(sbi), fio.blk_addr);
if (!page)
continue;
if (PageUptodate(page)) {
@@ -158,7 +160,7 @@ int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages, int type
continue;
}

- f2fs_submit_page_mbio(sbi, page, blk_addr, &fio);
+ f2fs_submit_page_mbio(sbi, page, &fio);
f2fs_put_page(page, 0);
}
out:
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index caa08e4..d86f8b1 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -132,14 +132,14 @@ void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi,
* Return unlocked page.
*/
int f2fs_submit_page_bio(struct f2fs_sb_info *sbi, struct page *page,
- block_t blk_addr, int rw)
+ struct f2fs_io_info *fio)
{
struct bio *bio;

- trace_f2fs_submit_page_bio(page, blk_addr, rw);
+ trace_f2fs_submit_page_bio(page, fio->blk_addr, fio->rw);

/* Allocate a new bio */
- bio = __bio_alloc(sbi, blk_addr, 1, is_read_io(rw));
+ bio = __bio_alloc(sbi, fio->blk_addr, 1, is_read_io(fio->rw));

if (bio_add_page(bio, page, PAGE_CACHE_SIZE, 0) < PAGE_CACHE_SIZE) {
bio_put(bio);
@@ -147,12 +147,12 @@ int f2fs_submit_page_bio(struct f2fs_sb_info *sbi, struct page *page,
return -EFAULT;
}

- submit_bio(rw, bio);
+ submit_bio(fio->rw, bio);
return 0;
}

void f2fs_submit_page_mbio(struct f2fs_sb_info *sbi, struct page *page,
- block_t blk_addr, struct f2fs_io_info *fio)
+ struct f2fs_io_info *fio)
{
enum page_type btype = PAGE_TYPE_OF_BIO(fio->type);
struct f2fs_bio_info *io;
@@ -160,21 +160,21 @@ void f2fs_submit_page_mbio(struct f2fs_sb_info *sbi, struct page *page,

io = is_read ? &sbi->read_io : &sbi->write_io[btype];

- verify_block_addr(sbi, blk_addr);
+ verify_block_addr(sbi, fio->blk_addr);

down_write(&io->io_rwsem);

if (!is_read)
inc_page_count(sbi, F2FS_WRITEBACK);

- if (io->bio && (io->last_block_in_bio != blk_addr - 1 ||
+ if (io->bio && (io->last_block_in_bio != fio->blk_addr - 1 ||
io->fio.rw != fio->rw))
__submit_merged_bio(io);
alloc_new:
if (io->bio == NULL) {
int bio_blocks = MAX_BIO_BLOCKS(sbi);

- io->bio = __bio_alloc(sbi, blk_addr, bio_blocks, is_read);
+ io->bio = __bio_alloc(sbi, fio->blk_addr, bio_blocks, is_read);
io->fio = *fio;
}

@@ -184,10 +184,10 @@ alloc_new:
goto alloc_new;
}

- io->last_block_in_bio = blk_addr;
+ io->last_block_in_bio = fio->blk_addr;

up_write(&io->io_rwsem);
- trace_f2fs_submit_page_mbio(page, fio->rw, fio->type, blk_addr);
+ trace_f2fs_submit_page_mbio(page, fio->rw, fio->type, fio->blk_addr);
}

/*
@@ -376,6 +376,10 @@ struct page *find_data_page(struct inode *inode, pgoff_t index, bool sync)
struct dnode_of_data dn;
struct page *page;
int err;
+ struct f2fs_io_info fio = {
+ .type = DATA,
+ .rw = sync ? READ_SYNC : READA,
+ };

page = find_get_page(mapping, index);
if (page && PageUptodate(page))
@@ -404,8 +408,8 @@ struct page *find_data_page(struct inode *inode, pgoff_t index, bool sync)
return page;
}

- err = f2fs_submit_page_bio(F2FS_I_SB(inode), page, dn.data_blkaddr,
- sync ? READ_SYNC : READA);
+ fio.blk_addr = dn.data_blkaddr;
+ err = f2fs_submit_page_bio(F2FS_I_SB(inode), page, &fio);
if (err)
return ERR_PTR(err);

@@ -430,7 +434,10 @@ struct page *get_lock_data_page(struct inode *inode, pgoff_t index)
struct dnode_of_data dn;
struct page *page;
int err;
-
+ struct f2fs_io_info fio = {
+ .type = DATA,
+ .rw = READ_SYNC,
+ };
repeat:
page = grab_cache_page(mapping, index);
if (!page)
@@ -464,8 +471,8 @@ repeat:
return page;
}

- err = f2fs_submit_page_bio(F2FS_I_SB(inode), page,
- dn.data_blkaddr, READ_SYNC);
+ fio.blk_addr = dn.data_blkaddr;
+ err = f2fs_submit_page_bio(F2FS_I_SB(inode), page, &fio);
if (err)
return ERR_PTR(err);

@@ -515,8 +522,12 @@ repeat:
zero_user_segment(page, 0, PAGE_CACHE_SIZE);
SetPageUptodate(page);
} else {
- err = f2fs_submit_page_bio(F2FS_I_SB(inode), page,
- dn.data_blkaddr, READ_SYNC);
+ struct f2fs_io_info fio = {
+ .type = DATA,
+ .rw = READ_SYNC,
+ .blk_addr = dn.data_blkaddr,
+ };
+ err = f2fs_submit_page_bio(F2FS_I_SB(inode), page, &fio);
if (err)
goto put_err;

@@ -745,7 +756,6 @@ static int f2fs_read_data_pages(struct file *file,
int do_write_data_page(struct page *page, struct f2fs_io_info *fio)
{
struct inode *inode = page->mapping->host;
- block_t old_blkaddr, new_blkaddr;
struct dnode_of_data dn;
int err = 0;

@@ -754,10 +764,10 @@ int do_write_data_page(struct page *page, struct f2fs_io_info *fio)
if (err)
return err;

- old_blkaddr = dn.data_blkaddr;
+ fio->blk_addr = dn.data_blkaddr;

/* This page is already truncated */
- if (old_blkaddr == NULL_ADDR)
+ if (fio->blk_addr == NULL_ADDR)
goto out_writepage;

set_page_writeback(page);
@@ -766,14 +776,14 @@ int do_write_data_page(struct page *page, struct f2fs_io_info *fio)
* If current allocation needs SSR,
* it had better in-place writes for updated data.
*/
- if (unlikely(old_blkaddr != NEW_ADDR &&
+ if (unlikely(fio->blk_addr != NEW_ADDR &&
!is_cold_data(page) &&
need_inplace_update(inode))) {
- rewrite_data_page(page, old_blkaddr, fio);
+ rewrite_data_page(page, fio);
set_inode_flag(F2FS_I(inode), FI_UPDATE_WRITE);
} else {
- write_data_page(page, &dn, &new_blkaddr, fio);
- update_extent_cache(new_blkaddr, &dn);
+ write_data_page(page, &dn, fio);
+ update_extent_cache(fio->blk_addr, &dn);
set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE);
}
out_writepage:
@@ -1007,8 +1017,12 @@ put_next:
if (dn.data_blkaddr == NEW_ADDR) {
zero_user_segment(page, 0, PAGE_CACHE_SIZE);
} else {
- err = f2fs_submit_page_bio(sbi, page, dn.data_blkaddr,
- READ_SYNC);
+ struct f2fs_io_info fio = {
+ .type = DATA,
+ .rw = READ_SYNC,
+ .blk_addr = dn.data_blkaddr,
+ };
+ err = f2fs_submit_page_bio(sbi, page, &fio);
if (err)
goto fail;

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index a8ccbce..3f07b50 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -491,6 +491,7 @@ enum page_type {
struct f2fs_io_info {
enum page_type type; /* contains DATA/NODE/META/META_FLUSH */
int rw; /* contains R/RS/W/WS with REQ_META/REQ_PRIO */
+ block_t blk_addr; /* block address to be written */
};

#define is_read_io(rw) (((rw) & 1) == READ)
@@ -1414,10 +1415,10 @@ int f2fs_trim_fs(struct f2fs_sb_info *, struct fstrim_range *);
struct page *get_sum_page(struct f2fs_sb_info *, unsigned int);
void write_meta_page(struct f2fs_sb_info *, struct page *);
void write_node_page(struct f2fs_sb_info *, struct page *,
- struct f2fs_io_info *, unsigned int, block_t, block_t *);
-void write_data_page(struct page *, struct dnode_of_data *, block_t *,
- struct f2fs_io_info *);
-void rewrite_data_page(struct page *, block_t, struct f2fs_io_info *);
+ unsigned int, struct f2fs_io_info *);
+void write_data_page(struct page *, struct dnode_of_data *,
+ struct f2fs_io_info *);
+void rewrite_data_page(struct page *, struct f2fs_io_info *);
void recover_data_page(struct f2fs_sb_info *, struct page *,
struct f2fs_summary *, block_t, block_t);
void allocate_data_block(struct f2fs_sb_info *, struct page *,
@@ -1464,8 +1465,9 @@ void destroy_checkpoint_caches(void);
* data.c
*/
void f2fs_submit_merged_bio(struct f2fs_sb_info *, enum page_type, int);
-int f2fs_submit_page_bio(struct f2fs_sb_info *, struct page *, block_t, int);
-void f2fs_submit_page_mbio(struct f2fs_sb_info *, struct page *, block_t,
+int f2fs_submit_page_bio(struct f2fs_sb_info *, struct page *,
+ struct f2fs_io_info *);
+void f2fs_submit_page_mbio(struct f2fs_sb_info *, struct page *,
struct f2fs_io_info *);
int reserve_new_block(struct dnode_of_data *);
int f2fs_reserve_block(struct dnode_of_data *, pgoff_t);
diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
index f2d3c58..0c3f3f9 100644
--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -79,7 +79,6 @@ int f2fs_read_inline_data(struct inode *inode, struct page *page)
int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page)
{
void *src_addr, *dst_addr;
- block_t new_blk_addr;
struct f2fs_io_info fio = {
.type = DATA,
.rw = WRITE_SYNC | REQ_PRIO,
@@ -115,9 +114,9 @@ no_update:

/* write data page to try to make data consistent */
set_page_writeback(page);
-
- write_data_page(page, dn, &new_blk_addr, &fio);
- update_extent_cache(new_blk_addr, dn);
+ fio.blk_addr = dn->data_blkaddr;
+ write_data_page(page, dn, &fio);
+ update_extent_cache(fio.blk_addr, dn);
f2fs_wait_on_page_writeback(page, DATA);
if (dirty)
inode_dec_dirty_pages(dn->inode);
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index bcfd67c..adc35c9 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -977,6 +977,10 @@ static int read_node_page(struct page *page, int rw)
{
struct f2fs_sb_info *sbi = F2FS_P_SB(page);
struct node_info ni;
+ struct f2fs_io_info fio = {
+ .type = NODE,
+ .rw = rw,
+ };

get_node_info(sbi, page->index, &ni);

@@ -988,7 +992,8 @@ static int read_node_page(struct page *page, int rw)
if (PageUptodate(page))
return LOCKED_PAGE;

- return f2fs_submit_page_bio(sbi, page, ni.blk_addr, rw);
+ fio.blk_addr = ni.blk_addr;
+ return f2fs_submit_page_bio(sbi, page, &fio);
}

/*
@@ -1269,7 +1274,6 @@ static int f2fs_write_node_page(struct page *page,
{
struct f2fs_sb_info *sbi = F2FS_P_SB(page);
nid_t nid;
- block_t new_addr;
struct node_info ni;
struct f2fs_io_info fio = {
.type = NODE,
@@ -1304,9 +1308,11 @@ static int f2fs_write_node_page(struct page *page,
} else {
down_read(&sbi->node_write);
}
+
set_page_writeback(page);
- write_node_page(sbi, page, &fio, nid, ni.blk_addr, &new_addr);
- set_node_addr(sbi, &ni, new_addr, is_fsync_dnode(page));
+ fio.blk_addr = ni.blk_addr;
+ write_node_page(sbi, page, nid, &fio);
+ set_node_addr(sbi, &ni, fio.blk_addr, is_fsync_dnode(page));
dec_page_count(sbi, F2FS_DIRTY_NODES);
up_read(&sbi->node_write);
unlock_page(page);
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index c950c93..c726f86 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1182,39 +1182,39 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
}

static void do_write_page(struct f2fs_sb_info *sbi, struct page *page,
- block_t old_blkaddr, block_t *new_blkaddr,
- struct f2fs_summary *sum, struct f2fs_io_info *fio)
+ struct f2fs_summary *sum,
+ struct f2fs_io_info *fio)
{
int type = __get_segment_type(page, fio->type);

- allocate_data_block(sbi, page, old_blkaddr, new_blkaddr, sum, type);
+ allocate_data_block(sbi, page, fio->blk_addr, &fio->blk_addr, sum, type);

/* writeout dirty page into bdev */
- f2fs_submit_page_mbio(sbi, page, *new_blkaddr, fio);
+ f2fs_submit_page_mbio(sbi, page, fio);
}

void write_meta_page(struct f2fs_sb_info *sbi, struct page *page)
{
struct f2fs_io_info fio = {
.type = META,
- .rw = WRITE_SYNC | REQ_META | REQ_PRIO
+ .rw = WRITE_SYNC | REQ_META | REQ_PRIO,
+ .blk_addr = page->index,
};

set_page_writeback(page);
- f2fs_submit_page_mbio(sbi, page, page->index, &fio);
+ f2fs_submit_page_mbio(sbi, page, &fio);
}

void write_node_page(struct f2fs_sb_info *sbi, struct page *page,
- struct f2fs_io_info *fio,
- unsigned int nid, block_t old_blkaddr, block_t *new_blkaddr)
+ unsigned int nid, struct f2fs_io_info *fio)
{
struct f2fs_summary sum;
set_summary(&sum, nid, 0, 0);
- do_write_page(sbi, page, old_blkaddr, new_blkaddr, &sum, fio);
+ do_write_page(sbi, page, &sum, fio);
}

void write_data_page(struct page *page, struct dnode_of_data *dn,
- block_t *new_blkaddr, struct f2fs_io_info *fio)
+ struct f2fs_io_info *fio)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
struct f2fs_summary sum;
@@ -1223,14 +1223,12 @@ void write_data_page(struct page *page, struct dnode_of_data *dn,
f2fs_bug_on(sbi, dn->data_blkaddr == NULL_ADDR);
get_node_info(sbi, dn->nid, &ni);
set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
-
- do_write_page(sbi, page, dn->data_blkaddr, new_blkaddr, &sum, fio);
+ do_write_page(sbi, page, &sum, fio);
}

-void rewrite_data_page(struct page *page, block_t old_blkaddr,
- struct f2fs_io_info *fio)
+void rewrite_data_page(struct page *page, struct f2fs_io_info *fio)
{
- f2fs_submit_page_mbio(F2FS_P_SB(page), page, old_blkaddr, fio);
+ f2fs_submit_page_mbio(F2FS_P_SB(page), page, fio);
}

void recover_data_page(struct f2fs_sb_info *sbi,
--
2.1.1

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Next message: Jaegeuk Kim: "[PATCH 3/6] f2fs: add key functions for f2fs_io_tracer"
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