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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-11-11 16:46:40 -0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-11-25 10:15:50 -0800 |
| commit | c040ff9d69fd1d782fe577ba9e35c1f5798158ae (patch) | |
| tree | b833c477d306b768d88be6203a4cf0ecc55dbb61 /fs/f2fs | |
| parent | a7de608691f766cd148971a71d4f13aa1692d4c8 (diff) | |
| download | linux-c040ff9d69fd1d782fe577ba9e35c1f5798158ae.tar.bz2 | |
f2fs: fix redundant block allocation
In direct_IO path of f2fs_file_write_iter(),
1. f2fs_preallocate_blocks(F2FS_GET_BLOCK_PRE_DIO)
-> allocate LBA X
2. f2fs_direct_IO()
-> return 0;
Then,
f2fs_write_data_page() will allocate another LBA X+1.
This makes EIO triggered by HM-SMR.
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/data.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 2938311c97bf..59203a3c143e 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -658,6 +658,13 @@ alloc: return 0; } +static inline bool __force_buffered_io(struct inode *inode, int rw) +{ + return ((f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) || + (rw == WRITE && test_opt(F2FS_I_SB(inode), LFS)) || + F2FS_I_SB(inode)->s_ndevs); +} + int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from) { struct inode *inode = file_inode(iocb->ki_filp); @@ -677,7 +684,10 @@ int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from) err = f2fs_convert_inline_inode(inode); if (err) return err; - return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_DIO); + return f2fs_map_blocks(inode, &map, 1, + __force_buffered_io(inode, WRITE) ? + F2FS_GET_BLOCK_PRE_AIO : + F2FS_GET_BLOCK_PRE_DIO); } if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA) { err = f2fs_convert_inline_inode(inode); @@ -1769,11 +1779,7 @@ static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) if (err) return err; - if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) - return 0; - if (rw == WRITE && test_opt(F2FS_I_SB(inode), LFS)) - return 0; - if (F2FS_I_SB(inode)->s_ndevs) + if (__force_buffered_io(inode, rw)) return 0; trace_f2fs_direct_IO_enter(inode, offset, count, rw); |