From 530fe6ad7e4d7ff6254596c1219d25ed929e3867 Mon Sep 17 00:00:00 2001
From: Lianbo Jiang <lijiang@redhat.com>
Date: Mon, 23 May 2022 18:04:15 +0800
Subject: [PATCH 04/18] sbitmapq: fix invalid offset for
"sbitmap_queue_round_robin" on Linux v5.13-rc1
Kernel commit efe1f3a1d583 ("scsi: sbitmap: Maintain allocation
round_robin in sbitmap") moved the round_robin member from struct
sbitmap_queue to struct sbitmap. Without the patch, the sbitmapq
will fail:
crash> sbitmapq 0xffff8e99d0dc8010
sbitmapq: invalid structure member offset: sbitmap_queue_round_robin
FILE: sbitmap.c LINE: 378 FUNCTION: sbitmap_queue_context_load()
Signed-off-by: Lianbo Jiang <lijiang@redhat.com>
---
defs.h | 2 ++
sbitmap.c | 12 ++++++++++--
symbols.c | 2 ++
3 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/defs.h b/defs.h
index 0aeb98c4f654..ecbced24d2e3 100644
--- a/defs.h
+++ b/defs.h
@@ -2169,6 +2169,7 @@ struct offset_table { /* stash of commonly-used offsets */
long sbq_wait_state_wait_cnt;
long sbq_wait_state_wait;
long sbitmap_alloc_hint;
+ long sbitmap_round_robin;
};
struct size_table { /* stash of commonly-used sizes */
@@ -5909,6 +5910,7 @@ struct sbitmap_context {
unsigned map_nr;
ulong map_addr;
ulong alloc_hint;
+ bool round_robin;
};
typedef bool (*sbitmap_for_each_fn)(unsigned int idx, void *p);
diff --git a/sbitmap.c b/sbitmap.c
index 2921d5447c65..7b318b533702 100644
--- a/sbitmap.c
+++ b/sbitmap.c
@@ -352,7 +352,11 @@ static void sbitmap_queue_show(const struct sbitmap_queue_context *sqc,
FREEBUF(sbq_wait_state_buf);
- fprintf(fp, "round_robin = %d\n", sqc->round_robin);
+ if (VALID_MEMBER(sbitmap_queue_round_robin))
+ fprintf(fp, "round_robin = %d\n", sqc->round_robin);
+ else if (VALID_MEMBER(sbitmap_round_robin)) /* 5.13 and later */
+ fprintf(fp, "round_robin = %d\n", sc->round_robin);
+
fprintf(fp, "min_shallow_depth = %u\n", sqc->min_shallow_depth);
}
@@ -374,7 +378,8 @@ static void sbitmap_queue_context_load(ulong addr, struct sbitmap_queue_context
sqc->wake_index = INT(sbitmap_queue_buf + OFFSET(sbitmap_queue_wake_index));
sqc->ws_addr = ULONG(sbitmap_queue_buf + OFFSET(sbitmap_queue_ws));
sqc->ws_active = INT(sbitmap_queue_buf + OFFSET(sbitmap_queue_ws_active));
- sqc->round_robin = BOOL(sbitmap_queue_buf + OFFSET(sbitmap_queue_round_robin));
+ if (VALID_MEMBER(sbitmap_queue_round_robin))
+ sqc->round_robin = BOOL(sbitmap_queue_buf + OFFSET(sbitmap_queue_round_robin));
sqc->min_shallow_depth = UINT(sbitmap_queue_buf + OFFSET(sbitmap_queue_min_shallow_depth));
FREEBUF(sbitmap_queue_buf);
@@ -396,6 +401,8 @@ void sbitmap_context_load(ulong addr, struct sbitmap_context *sc)
sc->map_addr = ULONG(sbitmap_buf + OFFSET(sbitmap_map));
if (VALID_MEMBER(sbitmap_alloc_hint))
sc->alloc_hint = ULONG(sbitmap_buf + OFFSET(sbitmap_alloc_hint));
+ if (VALID_MEMBER(sbitmap_round_robin))
+ sc->round_robin = BOOL(sbitmap_buf + OFFSET(sbitmap_round_robin));
FREEBUF(sbitmap_buf);
}
@@ -522,6 +529,7 @@ void sbitmapq_init(void)
MEMBER_OFFSET_INIT(sbitmap_map_nr, "sbitmap", "map_nr");
MEMBER_OFFSET_INIT(sbitmap_map, "sbitmap", "map");
MEMBER_OFFSET_INIT(sbitmap_alloc_hint, "sbitmap", "alloc_hint");
+ MEMBER_OFFSET_INIT(sbitmap_round_robin, "sbitmap", "round_robin");
MEMBER_OFFSET_INIT(sbitmap_queue_sb, "sbitmap_queue", "sb");
MEMBER_OFFSET_INIT(sbitmap_queue_alloc_hint, "sbitmap_queue", "alloc_hint");
diff --git a/symbols.c b/symbols.c
index fd0eb06899f0..5d12a021c769 100644
--- a/symbols.c
+++ b/symbols.c
@@ -10710,6 +10710,8 @@ dump_offset_table(char *spec, ulong makestruct)
OFFSET(sbitmap_map));
fprintf(fp, " sbitmap_alloc_hint: %ld\n",
OFFSET(sbitmap_alloc_hint));
+ fprintf(fp, " sbitmap_round_robin: %ld\n",
+ OFFSET(sbitmap_round_robin));
fprintf(fp, " sbitmap_queue_sb: %ld\n",
OFFSET(sbitmap_queue_sb));
fprintf(fp, " sbitmap_queue_alloc_hint: %ld\n",
--
2.30.2