Re: [PATCH v8 06/11] zonefs: allow non power of 2 zoned devices
From: Damien Le Moal
Date: Wed Jul 27 2022 - 23:16:24 EST
On 7/28/22 01:22, Pankaj Raghav wrote:
> The zone size shift variable is useful only if the zone sizes are known
> to be power of 2. Remove that variable and use generic helpers from
> block layer to calculate zone index in zonefs.
>
> Reviewed-by: Luis Chamberlain <mcgrof@xxxxxxxxxx>
> Signed-off-by: Pankaj Raghav <p.raghav@xxxxxxxxxxx>
Acked-by: Damien Le Moal <damien.lemoal@xxxxxxxxxxxxxxxxxx>
> ---
> fs/zonefs/super.c | 6 ++----
> fs/zonefs/zonefs.h | 1 -
> 2 files changed, 2 insertions(+), 5 deletions(-)
>
> diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c
> index 860f0b1032c6..e549ef16738c 100644
> --- a/fs/zonefs/super.c
> +++ b/fs/zonefs/super.c
> @@ -476,10 +476,9 @@ static void __zonefs_io_error(struct inode *inode, bool write)
> {
> struct zonefs_inode_info *zi = ZONEFS_I(inode);
> struct super_block *sb = inode->i_sb;
> - struct zonefs_sb_info *sbi = ZONEFS_SB(sb);
> unsigned int noio_flag;
> unsigned int nr_zones =
> - zi->i_zone_size >> (sbi->s_zone_sectors_shift + SECTOR_SHIFT);
> + bdev_zone_no(sb->s_bdev, zi->i_zone_size >> SECTOR_SHIFT);
> struct zonefs_ioerr_data err = {
> .inode = inode,
> .write = write,
> @@ -1401,7 +1400,7 @@ static int zonefs_init_file_inode(struct inode *inode, struct blk_zone *zone,
> struct zonefs_inode_info *zi = ZONEFS_I(inode);
> int ret = 0;
>
> - inode->i_ino = zone->start >> sbi->s_zone_sectors_shift;
> + inode->i_ino = bdev_zone_no(sb->s_bdev, zone->start);
> inode->i_mode = S_IFREG | sbi->s_perm;
>
> zi->i_ztype = type;
> @@ -1776,7 +1775,6 @@ static int zonefs_fill_super(struct super_block *sb, void *data, int silent)
> * interface constraints.
> */
> sb_set_blocksize(sb, bdev_zone_write_granularity(sb->s_bdev));
> - sbi->s_zone_sectors_shift = ilog2(bdev_zone_sectors(sb->s_bdev));
> sbi->s_uid = GLOBAL_ROOT_UID;
> sbi->s_gid = GLOBAL_ROOT_GID;
> sbi->s_perm = 0640;
> diff --git a/fs/zonefs/zonefs.h b/fs/zonefs/zonefs.h
> index 4b3de66c3233..39895195cda6 100644
> --- a/fs/zonefs/zonefs.h
> +++ b/fs/zonefs/zonefs.h
> @@ -177,7 +177,6 @@ struct zonefs_sb_info {
> kgid_t s_gid;
> umode_t s_perm;
> uuid_t s_uuid;
> - unsigned int s_zone_sectors_shift;
>
> unsigned int s_nr_files[ZONEFS_ZTYPE_MAX];
>
--
Damien Le Moal
Western Digital Research