diff options
Diffstat (limited to 'fs/f2fs/file.c')
| -rw-r--r-- | fs/f2fs/file.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index ce4905a073b3..8a9455bf956f 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -808,6 +808,46 @@ int f2fs_truncate(struct inode *inode) return 0; } +static int block_unaligned_IO(struct inode *inode, struct kiocb *iocb, + struct iov_iter *iter) +{ + unsigned int i_blkbits = READ_ONCE(inode->i_blkbits); + unsigned int blocksize_mask = (1 << i_blkbits) - 1; + loff_t offset = iocb->ki_pos; + unsigned long align = offset | iov_iter_alignment(iter); + + return align & blocksize_mask; +} + +static bool f2fs_force_buffered_io(struct inode *inode, + struct kiocb *iocb, struct iov_iter *iter) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + int rw = iov_iter_rw(iter); + + if (!fscrypt_dio_supported(inode)) + return true; + if (fsverity_active(inode)) + return true; + if (f2fs_compressed_file(inode)) + return true; + + /* disallow direct IO if any of devices has unaligned blksize */ + if (f2fs_is_multi_device(sbi) && !sbi->aligned_blksize) + return true; + + if (f2fs_lfs_mode(sbi) && (rw == WRITE)) { + if (block_unaligned_IO(inode, iocb, iter)) + return true; + if (F2FS_IO_ALIGNED(sbi)) + return true; + } + if (is_sbi_flag_set(F2FS_I_SB(inode), SBI_CP_DISABLED)) + return true; + + return false; +} + int f2fs_getattr(struct user_namespace *mnt_userns, const struct path *path, struct kstat *stat, u32 request_mask, unsigned int query_flags) { |