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f2fs: introduce sysfs/data_io_flag to attach REQ_META/FUA 

This patch introduces a way to attach REQ_META/FUA explicitly
to all the data writes given temperature.

-> attach REQ_FUA to Hot Data writes

-> attach REQ_FUA to Hot|Warm Data writes

-> attach REQ_FUA to Hot|Warm|Cold Data writes

-> attach REQ_FUA to Hot|Warm|Cold Data writes as well as
          REQ_META to Hot Data writes

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2020-04-02 09:32:35 -07:00
parent 63bef48fd6
commit da9953b729
4 changed files with 37 additions and 1 deletions
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9
Documentation/ABI/testing/sysfs-fs-f2fs
View File

@ -323,3 +323,12 @@ What: /sys/fs/f2fs/<disk>/mounted_time_sec
Date: February 2020
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description: Show the mounted time in secs of this partition.
What: /sys/fs/f2fs/<disk>/data_io_flag
Date: April 2020
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description: Give a way to attach REQ_META|FUA to data writes
given temperature-based bits. Now the bits indicate:
* REQ_META | REQ_FUA |
* 5 | 4 | 3 | 2 | 1 | 0 |
* Cold | Warm | Hot | Cold | Warm | Hot |

23
fs/f2fs/data.c
View File

@ -513,6 +513,28 @@ void f2fs_submit_bio(struct f2fs_sb_info *sbi,
__submit_bio(sbi, bio, type);
}
static void __attach_data_io_flag(struct f2fs_io_info *fio)
{
struct f2fs_sb_info *sbi = fio->sbi;
unsigned int temp_mask = (1 << NR_TEMP_TYPE) - 1;
unsigned int fua_flag = sbi->data_io_flag & temp_mask;
unsigned int meta_flag = (sbi->data_io_flag >> NR_TEMP_TYPE) &
temp_mask;
/*
* data io flag bits per temp:
* REQ_META | REQ_FUA |
* 5 | 4 | 3 | 2 | 1 | 0 |
* Cold | Warm | Hot | Cold | Warm | Hot |
*/
if (fio->type != DATA)
return;
if ((1 << fio->temp) & meta_flag)
fio->op_flags |= REQ_META;
if ((1 << fio->temp) & fua_flag)
fio->op_flags |= REQ_FUA;
}
static void __submit_merged_bio(struct f2fs_bio_info *io)
{
struct f2fs_io_info *fio = &io->fio;
@ -520,6 +542,7 @@ static void __submit_merged_bio(struct f2fs_bio_info *io)
if (!io->bio)
return;
__attach_data_io_flag(fio);
bio_set_op_attrs(io->bio, fio->op, fio->op_flags);
if (is_read_io(fio->op))

3
fs/f2fs/f2fs.h
View File

@ -1507,6 +1507,9 @@ struct f2fs_sb_info {
unsigned long long write_iostat[NR_IO_TYPE];
bool iostat_enable;
/* to attach REQ_META|REQ_FUA flags */
unsigned int data_io_flag;
/* For sysfs suppport */
struct kobject s_kobj;
struct completion s_kobj_unregister;

3
fs/f2fs/sysfs.c
View File

@ -372,7 +372,6 @@ out:
return count;
}
if (!strcmp(a->attr.name, "iostat_enable")) {
sbi->iostat_enable = !!t;
if (!sbi->iostat_enable)
@ -543,6 +542,7 @@ F2FS_RW_ATTR(F2FS_SBI, f2fs_super_block, extension_list, extension_list);
F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
#endif
F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, data_io_flag, data_io_flag);
F2FS_GENERAL_RO_ATTR(dirty_segments);
F2FS_GENERAL_RO_ATTR(free_segments);
F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
@ -622,6 +622,7 @@ static struct attribute *f2fs_attrs[] = {
ATTR_LIST(inject_rate),
ATTR_LIST(inject_type),
#endif
ATTR_LIST(data_io_flag),
ATTR_LIST(dirty_segments),
ATTR_LIST(free_segments),
ATTR_LIST(unusable),