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zonefs: add zone-capacity support 

In the zoned storage model, the sectors within a zone are typically all
writeable. With the introduction of the Zoned Namespace (ZNS) Command
Set in the NVM Express organization, the model was extended to have a
specific writeable capacity.

This zone capacity can be less than the overall zone size for a NVMe ZNS
device or null_blk in zoned-mode. For other ZBC/ZAC devices the zone
capacity is always equal to the zone size.

Use the zone capacity field instead from blk_zone for determining the
maximum inode size and inode blocks in zonefs.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
This commit is contained in:
Johannes Thumshirn 2020-07-21 21:10:26 +09:00 committed by Damien Le Moal
parent 00e4db5125
commit e3c3155bc9
2 changed files with 15 additions and 4 deletions
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16
fs/zonefs/super.c
View File

@ -335,7 +335,7 @@ static void zonefs_io_error(struct inode *inode, bool write)
struct zonefs_sb_info *sbi = ZONEFS_SB(sb);
unsigned int noio_flag;
unsigned int nr_zones =
zi->i_max_size >> (sbi->s_zone_sectors_shift + SECTOR_SHIFT);
zi->i_zone_size >> (sbi->s_zone_sectors_shift + SECTOR_SHIFT);
struct zonefs_ioerr_data err = {
.inode = inode,
.write = write,
@ -398,7 +398,7 @@ static int zonefs_file_truncate(struct inode *inode, loff_t isize)
goto unlock;
ret = blkdev_zone_mgmt(inode->i_sb->s_bdev, op, zi->i_zsector,
zi->i_max_size >> SECTOR_SHIFT, GFP_NOFS);
zi->i_zone_size >> SECTOR_SHIFT, GFP_NOFS);
if (ret) {
zonefs_err(inode->i_sb,
"Zone management operation at %llu failed %d",
@ -1053,14 +1053,16 @@ static void zonefs_init_file_inode(struct inode *inode, struct blk_zone *zone,
zi->i_ztype = type;
zi->i_zsector = zone->start;
zi->i_zone_size = zone->len << SECTOR_SHIFT;
zi->i_max_size = min_t(loff_t, MAX_LFS_FILESIZE,
zone->len << SECTOR_SHIFT);
zone->capacity << SECTOR_SHIFT);
zi->i_wpoffset = zonefs_check_zone_condition(inode, zone, true, true);
inode->i_uid = sbi->s_uid;
inode->i_gid = sbi->s_gid;
inode->i_size = zi->i_wpoffset;
inode->i_blocks = zone->len;
inode->i_blocks = zi->i_max_size >> SECTOR_SHIFT;
inode->i_op = &zonefs_file_inode_operations;
inode->i_fop = &zonefs_file_operations;
@ -1167,12 +1169,18 @@ static int zonefs_create_zgroup(struct zonefs_zone_data *zd,
if (zonefs_zone_type(next) != type)
break;
zone->len += next->len;
zone->capacity += next->capacity;
if (next->cond == BLK_ZONE_COND_READONLY &&
zone->cond != BLK_ZONE_COND_OFFLINE)
zone->cond = BLK_ZONE_COND_READONLY;
else if (next->cond == BLK_ZONE_COND_OFFLINE)
zone->cond = BLK_ZONE_COND_OFFLINE;
}
if (zone->capacity != zone->len) {
zonefs_err(sb, "Invalid conventional zone capacity\n");
ret = -EINVAL;
goto free;
}
}
/*

3
fs/zonefs/zonefs.h
View File

@ -56,6 +56,9 @@ struct zonefs_inode_info {
/* File maximum size */
loff_t i_max_size;
/* File zone size */
loff_t i_zone_size;
/*
* To serialise fully against both syscall and mmap based IO and
* sequential file truncation, two locks are used. For serializing