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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2021-11-13 01:31:16 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2021-12-04 21:53:33 +0300 |
| commit | d4dd19ec1ea0cf6532d65709325c42b1398614a8 (patch) | |
| tree | 399db103c398219451cf13c22ff3bf6639dd439d /fs/f2fs/f2fs.h | |
| parent | b31bf0f96e71a2c81d2122c3fecdb91f8e215c20 (diff) | |
| download | linux-d4dd19ec1ea0cf6532d65709325c42b1398614a8.tar.xz | |
f2fs: do not expose unwritten blocks to user by DIO
DIO preallocates physical blocks before writing data, but if an error occurrs
or power-cut happens, we can see block contents from the disk. This patch tries
to fix it by 1) turning to buffered writes for DIO into holes, 2) truncating
unwritten blocks from error or power-cut.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/f2fs.h')
| -rw-r--r-- | fs/f2fs/f2fs.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 6f196621f772..d7435fcb9658 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -654,6 +654,7 @@ enum { #define FADVISE_KEEP_SIZE_BIT 0x10 #define FADVISE_HOT_BIT 0x20 #define FADVISE_VERITY_BIT 0x40 +#define FADVISE_TRUNC_BIT 0x80 #define FADVISE_MODIFIABLE_BITS (FADVISE_COLD_BIT | FADVISE_HOT_BIT) @@ -681,6 +682,10 @@ enum { #define file_is_verity(inode) is_file(inode, FADVISE_VERITY_BIT) #define file_set_verity(inode) set_file(inode, FADVISE_VERITY_BIT) +#define file_should_truncate(inode) is_file(inode, FADVISE_TRUNC_BIT) +#define file_need_truncate(inode) set_file(inode, FADVISE_TRUNC_BIT) +#define file_dont_truncate(inode) clear_file(inode, FADVISE_TRUNC_BIT) + #define DEF_DIR_LEVEL 0 enum { |