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author | Chao Yu <chao2.yu@samsung.com> | 2016-01-05 16:52:46 +0800 |
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committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-01-08 11:45:20 -0800 |
commit | 0e022ea8fc49ed9c72ab9dcd9ca96414dc026184 (patch) | |
tree | ff499ae34af010d18034fb57101f764d920faa04 /fs/f2fs | |
parent | e84587250ab7e38b7d85e93a8c317e065e5c0a1f (diff) | |
download | linux-0e022ea8fc49ed9c72ab9dcd9ca96414dc026184.tar.gz linux-0e022ea8fc49ed9c72ab9dcd9ca96414dc026184.tar.bz2 linux-0e022ea8fc49ed9c72ab9dcd9ca96414dc026184.zip |
f2fs: introduce __get_node_page to reuse common code
There are duplicated code in between get_node_page and get_node_page_ra,
introduce __get_node_page to includes common parts of these two, and
export get_node_page and get_node_page_ra by reusing __get_node_page.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
-rw-r--r-- | fs/f2fs/node.c | 88 |
1 files changed, 35 insertions, 53 deletions
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index c1ddf3d88dd9..5a2d800f4abc 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -1060,56 +1060,35 @@ void ra_node_page(struct f2fs_sb_info *sbi, nid_t nid) f2fs_put_page(apage, err ? 1 : 0); } -struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid) +/* + * readahead MAX_RA_NODE number of node pages. + */ +void ra_node_pages(struct page *parent, int start) { - struct page *page; - int err; + struct f2fs_sb_info *sbi = F2FS_P_SB(parent); + struct blk_plug plug; + int i, end; + nid_t nid; - if (!nid) - return ERR_PTR(-ENOENT); - f2fs_bug_on(sbi, check_nid_range(sbi, nid)); -repeat: - page = grab_cache_page(NODE_MAPPING(sbi), nid); - if (!page) - return ERR_PTR(-ENOMEM); + blk_start_plug(&plug); - err = read_node_page(page, READ_SYNC); - if (err < 0) { - f2fs_put_page(page, 1); - return ERR_PTR(err); - } else if (err == LOCKED_PAGE) { - goto page_hit; + /* Then, try readahead for siblings of the desired node */ + end = start + MAX_RA_NODE; + end = min(end, NIDS_PER_BLOCK); + for (i = start; i < end; i++) { + nid = get_nid(parent, i, false); + ra_node_page(sbi, nid); } - lock_page(page); - - if (unlikely(!PageUptodate(page))) { - f2fs_put_page(page, 1); - return ERR_PTR(-EIO); - } - if (unlikely(page->mapping != NODE_MAPPING(sbi))) { - f2fs_put_page(page, 1); - goto repeat; - } -page_hit: - f2fs_bug_on(sbi, nid != nid_of_node(page)); - return page; + blk_finish_plug(&plug); } -/* - * Return a locked page for the desired node page. - * And, readahead MAX_RA_NODE number of node pages. - */ -struct page *get_node_page_ra(struct page *parent, int start) +struct page *__get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid, + struct page *parent, int start) { - struct f2fs_sb_info *sbi = F2FS_P_SB(parent); - struct blk_plug plug; struct page *page; - int err, i, end; - nid_t nid; + int err; - /* First, try getting the desired direct node. */ - nid = get_nid(parent, start, false); if (!nid) return ERR_PTR(-ENOENT); f2fs_bug_on(sbi, check_nid_range(sbi, nid)); @@ -1126,21 +1105,11 @@ repeat: goto page_hit; } - blk_start_plug(&plug); - - /* Then, try readahead for siblings of the desired node */ - end = start + MAX_RA_NODE; - end = min(end, NIDS_PER_BLOCK); - for (i = start + 1; i < end; i++) { - nid_t tnid; - - tnid = get_nid(parent, i, false); - ra_node_page(sbi, tnid); - } - - blk_finish_plug(&plug); + if (parent) + ra_node_pages(parent, start + 1); lock_page(page); + if (unlikely(!PageUptodate(page))) { f2fs_put_page(page, 1); return ERR_PTR(-EIO); @@ -1154,6 +1123,19 @@ page_hit: return page; } +struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid) +{ + return __get_node_page(sbi, nid, NULL, 0); +} + +struct page *get_node_page_ra(struct page *parent, int start) +{ + struct f2fs_sb_info *sbi = F2FS_P_SB(parent); + nid_t nid = get_nid(parent, start, false); + + return __get_node_page(sbi, nid, parent, start); +} + void sync_inode_page(struct dnode_of_data *dn) { if (IS_INODE(dn->node_page) || dn->inode_page == dn->node_page) { |