On 2024/2/3 23:24, Wenjie Qi wrote:
> If the max open zones of zoned devices are less than
> the active logs of F2FS, the device may error due to
> insufficient zone resources when multiple active logs are
> being written at the same time. If this value is 0,
> there is no limit.
>
> Signed-off-by: Wenjie Qi <[email protected]>
> ---
> fs/f2fs/f2fs.h | 1 +
> fs/f2fs/super.c | 21 +++++++++++++++++++++
> 2 files changed, 22 insertions(+)
>
> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> index 543898482f8b..161107f2d3bd 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -1558,6 +1558,7 @@ struct f2fs_sb_info {
>
> #ifdef CONFIG_BLK_DEV_ZONED
> unsigned int blocks_per_blkz; /* F2FS blocks per zone */
> + unsigned int max_open_zones; /* max open zone resources of the zoned device */
> #endif
>
> /* for node-related operations */
> diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
> index 1b718bebfaa1..45e82d6016fc 100644
> --- a/fs/f2fs/super.c
> +++ b/fs/f2fs/super.c
> @@ -2388,6 +2388,16 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data)
> if (err)
> goto restore_opts;
>
> +#ifdef CONFIG_BLK_DEV_ZONED
> + if (sbi->max_open_zones && sbi->max_open_zones < F2FS_OPTION(sbi).active_logs) {
> + f2fs_err(sbi,
> + "zoned: max open zones %u is too small, need at least %u open zones",
> + sbi->max_open_zones, F2FS_OPTION(sbi).active_logs);
> + err = -EINVAL;
> + goto restore_opts;
> + }
> +#endif
> +
> /* flush outstanding errors before changing fs state */
> flush_work(&sbi->s_error_work);
>
> @@ -3930,11 +3940,22 @@ static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
> sector_t nr_sectors = bdev_nr_sectors(bdev);
> struct f2fs_report_zones_args rep_zone_arg;
> u64 zone_sectors;
> + unsigned int max_open_zones;
> int ret;
>
> if (!f2fs_sb_has_blkzoned(sbi))
> return 0;
>
> + max_open_zones = bdev_max_open_zones(bdev);
Wenjie,
max_open_zones can always be zero? then sbi->max_open_zones will be zero,
is this a valid case?
Thanks,
> + if (max_open_zones && (max_open_zones < sbi->max_open_zones || !sbi->max_open_zones))
> + sbi->max_open_zones = max_open_zones;
> + if (sbi->max_open_zones && sbi->max_open_zones < F2FS_OPTION(sbi).active_logs) {
> + f2fs_err(sbi,
> + "zoned: max open zones %u is too small, need at least %u open zones",
> + sbi->max_open_zones, F2FS_OPTION(sbi).active_logs);
> + return -EINVAL;
> + }
> +
> zone_sectors = bdev_zone_sectors(bdev);
> if (!is_power_of_2(zone_sectors)) {
> f2fs_err(sbi, "F2FS does not support non power of 2 zone sizes\n");