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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2023-2025 Christoph Hellwig.
* Copyright (c) 2024-2025, Western Digital Corporation or its affiliates.
*/
#include <linux/blkzoned.h>
#include "libxfs_priv.h"
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_inode.h"
#include "xfs_rtgroup.h"
#include "xfs_zones.h"
static bool
xfs_zone_validate_empty(
struct blk_zone *zone,
struct xfs_rtgroup *rtg,
xfs_rgblock_t *write_pointer)
{
struct xfs_mount *mp = rtg_mount(rtg);
if (rtg_rmap(rtg)->i_used_blocks > 0) {
xfs_warn(mp, "empty zone %u has non-zero used counter (0x%x).",
rtg_rgno(rtg), rtg_rmap(rtg)->i_used_blocks);
return false;
}
*write_pointer = 0;
return true;
}
static bool
xfs_zone_validate_wp(
struct blk_zone *zone,
struct xfs_rtgroup *rtg,
xfs_rgblock_t *write_pointer)
{
struct xfs_mount *mp = rtg_mount(rtg);
xfs_rtblock_t wp_fsb = xfs_daddr_to_rtb(mp, zone->wp);
if (rtg_rmap(rtg)->i_used_blocks > rtg->rtg_extents) {
xfs_warn(mp, "zone %u has too large used counter (0x%x).",
rtg_rgno(rtg), rtg_rmap(rtg)->i_used_blocks);
return false;
}
if (xfs_rtb_to_rgno(mp, wp_fsb) != rtg_rgno(rtg)) {
xfs_warn(mp, "zone %u write pointer (0x%llx) outside of zone.",
rtg_rgno(rtg), wp_fsb);
return false;
}
*write_pointer = xfs_rtb_to_rgbno(mp, wp_fsb);
if (*write_pointer >= rtg->rtg_extents) {
xfs_warn(mp, "zone %u has invalid write pointer (0x%x).",
rtg_rgno(rtg), *write_pointer);
return false;
}
return true;
}
static bool
xfs_zone_validate_full(
struct blk_zone *zone,
struct xfs_rtgroup *rtg,
xfs_rgblock_t *write_pointer)
{
struct xfs_mount *mp = rtg_mount(rtg);
if (rtg_rmap(rtg)->i_used_blocks > rtg->rtg_extents) {
xfs_warn(mp, "zone %u has too large used counter (0x%x).",
rtg_rgno(rtg), rtg_rmap(rtg)->i_used_blocks);
return false;
}
*write_pointer = rtg->rtg_extents;
return true;
}
static bool
xfs_zone_validate_seq(
struct blk_zone *zone,
struct xfs_rtgroup *rtg,
xfs_rgblock_t *write_pointer)
{
struct xfs_mount *mp = rtg_mount(rtg);
switch (zone->cond) {
case BLK_ZONE_COND_EMPTY:
return xfs_zone_validate_empty(zone, rtg, write_pointer);
case BLK_ZONE_COND_IMP_OPEN:
case BLK_ZONE_COND_EXP_OPEN:
case BLK_ZONE_COND_CLOSED:
return xfs_zone_validate_wp(zone, rtg, write_pointer);
case BLK_ZONE_COND_FULL:
return xfs_zone_validate_full(zone, rtg, write_pointer);
case BLK_ZONE_COND_NOT_WP:
case BLK_ZONE_COND_OFFLINE:
case BLK_ZONE_COND_READONLY:
xfs_warn(mp, "zone %u has unsupported zone condition 0x%x.",
rtg_rgno(rtg), zone->cond);
return false;
default:
xfs_warn(mp, "zone %u has unknown zone condition 0x%x.",
rtg_rgno(rtg), zone->cond);
return false;
}
}
static bool
xfs_zone_validate_conv(
struct blk_zone *zone,
struct xfs_rtgroup *rtg)
{
struct xfs_mount *mp = rtg_mount(rtg);
switch (zone->cond) {
case BLK_ZONE_COND_NOT_WP:
return true;
default:
xfs_warn(mp,
"conventional zone %u has unsupported zone condition 0x%x.",
rtg_rgno(rtg), zone->cond);
return false;
}
}
bool
xfs_zone_validate(
struct blk_zone *zone,
struct xfs_rtgroup *rtg,
xfs_rgblock_t *write_pointer)
{
struct xfs_mount *mp = rtg_mount(rtg);
struct xfs_groups *g = &mp->m_groups[XG_TYPE_RTG];
uint32_t expected_size;
/*
* Check that the zone capacity matches the rtgroup size stored in the
* superblock. Note that all zones including the last one must have a
* uniform capacity.
*/
if (XFS_BB_TO_FSB(mp, zone->capacity) != g->blocks) {
xfs_warn(mp,
"zone %u capacity (0x%llx) does not match RT group size (0x%x).",
rtg_rgno(rtg), XFS_BB_TO_FSB(mp, zone->capacity),
g->blocks);
return false;
}
if (g->has_daddr_gaps) {
expected_size = 1 << g->blklog;
} else {
if (zone->len != zone->capacity) {
xfs_warn(mp,
"zone %u has capacity != size ((0x%llx vs 0x%llx)",
rtg_rgno(rtg),
XFS_BB_TO_FSB(mp, zone->len),
XFS_BB_TO_FSB(mp, zone->capacity));
return false;
}
expected_size = g->blocks;
}
if (XFS_BB_TO_FSB(mp, zone->len) != expected_size) {
xfs_warn(mp,
"zone %u length (0x%llx) does match geometry (0x%x).",
rtg_rgno(rtg), XFS_BB_TO_FSB(mp, zone->len),
expected_size);
}
switch (zone->type) {
case BLK_ZONE_TYPE_CONVENTIONAL:
return xfs_zone_validate_conv(zone, rtg);
case BLK_ZONE_TYPE_SEQWRITE_REQ:
return xfs_zone_validate_seq(zone, rtg, write_pointer);
default:
xfs_warn(mp, "zoned %u has unsupported type 0x%x.",
rtg_rgno(rtg), zone->type);
return false;
}
}
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