On 09/03, Chao Yu wrote: > On 2019-9-3 6:54, Jaegeuk Kim wrote: > > On 08/31, Chao Yu wrote: > >> There are very similar codes in inc_valid_block_count() and > >> inc_valid_node_count() which is used for available user block > >> count calculation. > >> > >> This patch introduces a new helper get_available_block_count() > >> to include those common codes, and used it instead for cleanup. > >> > >> Signed-off-by: Chao Yu <yuch...@huawei.com> > >> --- > >> v2: > >> - fix panic during recovery > >> fs/f2fs/f2fs.h | 47 +++++++++++++++++++++++++++-------------------- > >> 1 file changed, 27 insertions(+), 20 deletions(-) > >> > >> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h > >> index a89ad8cab821..9c010e6cba5c 100644 > >> --- a/fs/f2fs/f2fs.h > >> +++ b/fs/f2fs/f2fs.h > >> @@ -1756,6 +1756,27 @@ static inline bool __allow_reserved_blocks(struct > >> f2fs_sb_info *sbi, > >> return false; > >> } > >> > >> +static inline unsigned int get_available_block_count(struct f2fs_sb_info > >> *sbi, > >> + struct inode *inode, bool cap) > >> +{ > >> + block_t avail_user_block_count; > >> + > >> + avail_user_block_count = sbi->user_block_count - > >> + sbi->current_reserved_blocks; > >> + > >> + if (!__allow_reserved_blocks(sbi, inode, cap)) > >> + avail_user_block_count -= F2FS_OPTION(sbi).root_reserved_blocks; > >> + > >> + if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) { > >> + if (avail_user_block_count > sbi->unusable_block_count) > >> + avail_user_block_count -= sbi->unusable_block_count; > >> + else > >> + avail_user_block_count = 0; > >> + } > >> + > >> + return avail_user_block_count; > >> +} > >> + > >> static inline void f2fs_i_blocks_write(struct inode *, block_t, bool, > >> bool); > >> static inline int inc_valid_block_count(struct f2fs_sb_info *sbi, > >> struct inode *inode, blkcnt_t *count) > >> @@ -1782,17 +1803,8 @@ static inline int inc_valid_block_count(struct > >> f2fs_sb_info *sbi, > >> > >> spin_lock(&sbi->stat_lock); > >> sbi->total_valid_block_count += (block_t)(*count); > >> - avail_user_block_count = sbi->user_block_count - > >> - sbi->current_reserved_blocks; > >> + avail_user_block_count = get_available_block_count(sbi, inode, true); > >> > >> - if (!__allow_reserved_blocks(sbi, inode, true)) > >> - avail_user_block_count -= F2FS_OPTION(sbi).root_reserved_blocks; > >> - if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) { > >> - if (avail_user_block_count > sbi->unusable_block_count) > >> - avail_user_block_count -= sbi->unusable_block_count; > >> - else > >> - avail_user_block_count = 0; > >> - } > >> if (unlikely(sbi->total_valid_block_count > avail_user_block_count)) { > >> diff = sbi->total_valid_block_count - avail_user_block_count; > >> if (diff > *count) > >> @@ -2005,7 +2017,8 @@ static inline int inc_valid_node_count(struct > >> f2fs_sb_info *sbi, > >> struct inode *inode, bool is_inode) > >> { > >> block_t valid_block_count; > >> - unsigned int valid_node_count, user_block_count; > >> + unsigned int valid_node_count; > >> + unsigned int avail_user_block_count; > >> int err; > >> > >> if (is_inode) { > >> @@ -2027,16 +2040,10 @@ static inline int inc_valid_node_count(struct > >> f2fs_sb_info *sbi, > >> > >> spin_lock(&sbi->stat_lock); > >> > >> - valid_block_count = sbi->total_valid_block_count + > >> - sbi->current_reserved_blocks + 1; > >> - > >> - if (!__allow_reserved_blocks(sbi, inode, false)) > >> - valid_block_count += F2FS_OPTION(sbi).root_reserved_blocks; > >> - user_block_count = sbi->user_block_count; > >> - if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) > >> - user_block_count -= sbi->unusable_block_count; > >> + valid_block_count = sbi->total_valid_block_count + 1; > >> + avail_user_block_count = get_available_block_count(sbi, inode, false); > > > > This doesn't look like same? > > Actually, calculations of block count in inc_valid_node_count() and > inc_valid_block_count() should be the same, I've no idea why we use different > policy for reserved block for root user.
Hmm, for now, let's defer to discuss this. > > Thanks, > > > > >> > >> - if (unlikely(valid_block_count > user_block_count)) { > >> + if (unlikely(valid_block_count > avail_user_block_count)) { > >> spin_unlock(&sbi->stat_lock); > >> goto enospc; > >> } > >> -- > >> 2.18.0.rc1