From ed3d12561a731b99b58c6c95151291cebf0b3feb Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Mon, 28 Dec 2015 11:39:06 -0800 Subject: [PATCH] f2fs: load largest extent all the time Otherwise, we can get mismatched largest extent information. One example is: 1. mount f2fs w/ extent_cache 2. make a small extent 3. umount 4. mount f2fs w/o extent_cache 5. update the largest extent 6. umount 7. mount f2fs w/ extent_cache 8. get the old extent made by #2 Signed-off-by: Jaegeuk Kim --- fs/f2fs/extent_cache.c | 18 +++++++++++++----- fs/f2fs/f2fs.h | 2 +- fs/f2fs/inode.c | 3 ++- 3 files changed, 16 insertions(+), 7 deletions(-) diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c index 5305a29f91a3..b37184f720e8 100644 --- a/fs/f2fs/extent_cache.c +++ b/fs/f2fs/extent_cache.c @@ -166,20 +166,27 @@ static void __drop_largest_extent(struct inode *inode, largest->len = 0; } -void f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext) +/* return true, if inode page is changed */ +bool f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext) { struct f2fs_sb_info *sbi = F2FS_I_SB(inode); struct extent_tree *et; struct extent_node *en; struct extent_info ei; - if (!f2fs_may_extent_tree(inode)) - return; + if (!f2fs_may_extent_tree(inode)) { + /* drop largest extent */ + if (i_ext && i_ext->len) { + i_ext->len = 0; + return true; + } + return false; + } et = __grab_extent_tree(inode); - if (!i_ext || le32_to_cpu(i_ext->len) < F2FS_MIN_EXTENT_LEN) - return; + if (!i_ext || !i_ext->len) + return false; set_extent_info(&ei, le32_to_cpu(i_ext->fofs), le32_to_cpu(i_ext->blk), le32_to_cpu(i_ext->len)); @@ -196,6 +203,7 @@ void f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext) } out: write_unlock(&et->lock); + return false; } static bool f2fs_lookup_extent_tree(struct inode *inode, pgoff_t pgofs, diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index e04b2be6cd64..a3395088e0f0 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -2083,7 +2083,7 @@ void f2fs_leave_shrinker(struct f2fs_sb_info *); * extent_cache.c */ unsigned int f2fs_shrink_extent_tree(struct f2fs_sb_info *, int); -void f2fs_init_extent_tree(struct inode *, struct f2fs_extent *); +bool f2fs_init_extent_tree(struct inode *, struct f2fs_extent *); unsigned int f2fs_destroy_extent_node(struct inode *); void f2fs_destroy_extent_tree(struct inode *); bool f2fs_lookup_extent_cache(struct inode *, pgoff_t, struct extent_info *); diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c index ec3fb32c4726..e95500802daa 100644 --- a/fs/f2fs/inode.c +++ b/fs/f2fs/inode.c @@ -138,7 +138,8 @@ static int do_read_inode(struct inode *inode) fi->i_pino = le32_to_cpu(ri->i_pino); fi->i_dir_level = ri->i_dir_level; - f2fs_init_extent_tree(inode, &ri->i_ext); + if (f2fs_init_extent_tree(inode, &ri->i_ext)) + set_page_dirty(node_page); get_inline_info(fi, ri); -- 2.20.1