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| author | Yunlei He <heyunlei@huawei.com> | 2017-05-19 09:06:12 +0200 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-05-24 06:07:18 +0200 |
| commit | dad48e73127ba10279ea33e6dbc8d3905c4d31c0 (patch) | |
| tree | 7594af62186ba7a56da3f25e2e442137a0183ce5 /fs/f2fs | |
| parent | f2fs: try to freeze in gc and discard threads (diff) | |
| download | linux-dad48e73127ba10279ea33e6dbc8d3905c4d31c0.tar.xz linux-dad48e73127ba10279ea33e6dbc8d3905c4d31c0.zip | |
f2fs: fix a bug caused by NULL extent tree
Thread A: Thread B:
-f2fs_remount
-sbi->mount_opt.opt = 0;
<--- -f2fs_iget
-do_read_inode
-f2fs_init_extent_tree
-F2FS_I(inode)->extent_tree is NULL
-default_options && parse_options
-remount return
<--- -f2fs_map_blocks
-f2fs_lookup_extent_tree
-f2fs_bug_on(sbi, !et);
The same problem with f2fs_new_inode.
Signed-off-by: Yunlei He <heyunlei@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/extent_cache.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c index 2f98d7039701..ff2352a0ed15 100644 --- a/fs/f2fs/extent_cache.c +++ b/fs/f2fs/extent_cache.c @@ -320,7 +320,7 @@ static void __drop_largest_extent(struct inode *inode, } /* return true, if inode page is changed */ -bool f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext) +static 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; @@ -358,6 +358,16 @@ out: return false; } +bool f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext) +{ + bool ret = __f2fs_init_extent_tree(inode, i_ext); + + if (!F2FS_I(inode)->extent_tree) + set_inode_flag(inode, FI_NO_EXTENT); + + return ret; +} + static bool f2fs_lookup_extent_tree(struct inode *inode, pgoff_t pgofs, struct extent_info *ei) { |