diff options
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/node.c | 40 | ||||
| -rw-r--r-- | fs/f2fs/node.h | 3 |
2 files changed, 28 insertions, 15 deletions
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 10cbee9dc3d1..8510c5ed402e 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -847,6 +847,12 @@ fail: return ERR_PTR(err); } +/* + * Caller should do after getting the following values. + * 0: f2fs_put_page(page, 0) + * LOCKED_PAGE: f2fs_put_page(page, 1) + * error: nothing + */ static int read_node_page(struct page *page, int type) { struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); @@ -859,10 +865,8 @@ static int read_node_page(struct page *page, int type) return -ENOENT; } - if (PageUptodate(page)) { - unlock_page(page); - return 0; - } + if (PageUptodate(page)) + return LOCKED_PAGE; return f2fs_readpage(sbi, page, ni.blk_addr, type); } @@ -874,6 +878,7 @@ void ra_node_page(struct f2fs_sb_info *sbi, nid_t nid) { struct address_space *mapping = sbi->node_inode->i_mapping; struct page *apage; + int err; apage = find_get_page(mapping, nid); if (apage && PageUptodate(apage)) { @@ -886,30 +891,36 @@ void ra_node_page(struct f2fs_sb_info *sbi, nid_t nid) if (!apage) return; - if (read_node_page(apage, READA) == 0) + err = read_node_page(apage, READA); + if (err == 0) f2fs_put_page(apage, 0); + else if (err == LOCKED_PAGE) + f2fs_put_page(apage, 1); return; } struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid) { - int err; - struct page *page; struct address_space *mapping = sbi->node_inode->i_mapping; + struct page *page; + int err; page = grab_cache_page(mapping, nid); if (!page) return ERR_PTR(-ENOMEM); err = read_node_page(page, READ_SYNC); - if (err) + if (err < 0) return ERR_PTR(err); + else if (err == LOCKED_PAGE) + goto got_it; lock_page(page); if (!PageUptodate(page)) { f2fs_put_page(page, 1); return ERR_PTR(-EIO); } +got_it: BUG_ON(nid != nid_of_node(page)); mark_page_accessed(page); return page; @@ -923,10 +934,9 @@ struct page *get_node_page_ra(struct page *parent, int start) { struct f2fs_sb_info *sbi = F2FS_SB(parent->mapping->host->i_sb); struct address_space *mapping = sbi->node_inode->i_mapping; - int i, end; - int err = 0; - nid_t nid; struct page *page; + int err, i, end; + nid_t nid; /* First, try getting the desired direct node. */ nid = get_nid(parent, start, false); @@ -936,12 +946,12 @@ struct page *get_node_page_ra(struct page *parent, int start) page = grab_cache_page(mapping, nid); if (!page) return ERR_PTR(-ENOMEM); - else if (PageUptodate(page)) - goto page_hit; err = read_node_page(page, READ_SYNC); - if (err) + if (err < 0) 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; @@ -956,7 +966,7 @@ struct page *get_node_page_ra(struct page *parent, int start) lock_page(page); page_hit: - if (PageError(page)) { + if (!PageUptodate(page)) { f2fs_put_page(page, 1); return ERR_PTR(-EIO); } diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h index d009cdfd2679..271a61c25601 100644 --- a/fs/f2fs/node.h +++ b/fs/f2fs/node.h @@ -29,6 +29,9 @@ /* vector size for gang look-up from nat cache that consists of radix tree */ #define NATVEC_SIZE 64 +/* return value for read_node_page */ +#define LOCKED_PAGE 1 + /* * For node information */ |