From 530fe6ad7e4d7ff6254596c1219d25ed929e3867 Mon Sep 17 00:00:00 2001 From: Lianbo Jiang Date: Mon, 23 May 2022 18:04:15 +0800 Subject: [PATCH 03/15] 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 --- 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