43 lines
1.7 KiB
Diff
43 lines
1.7 KiB
Diff
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From 8032bb4053ff8803371b038fc696b9fa682027f2 Mon Sep 17 00:00:00 2001
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From: Jerome Marchand <jmarchan@redhat.com>
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Date: Thu, 7 Oct 2021 17:31:53 +0200
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Subject: [PATCH] Fix mdflush on RHEL9
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Since kernel commit 309dca309fc ("block: store a block_device pointer
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in struct bio") struct bio points again to a block_device and not to a
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gendisk directly. However mdflush is looking at the presence or not of
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the bio_dev macro to check whether to get the gendisk directly from
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the bio or not, which doesn't work anymore since the bio_dev macro
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still exists. Since we don't have to deal other ekrnel kernel version
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but our own, just use the definition that we use in our kernels.
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---
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tools/mdflush.py | 11 -----------
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1 file changed, 11 deletions(-)
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diff --git a/tools/mdflush.py b/tools/mdflush.py
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index 2abe15cf..df0f13c1 100755
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--- a/tools/mdflush.py
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+++ b/tools/mdflush.py
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@@ -35,18 +35,7 @@ int kprobe__md_flush_request(struct pt_regs *ctx, void *mddev, struct bio *bio)
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u32 pid = bpf_get_current_pid_tgid();
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data.pid = pid;
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bpf_get_current_comm(&data.comm, sizeof(data.comm));
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-/*
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- * The following deals with a kernel version change (in mainline 4.14, although
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- * it may be backported to earlier kernels) with how the disk name is accessed.
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- * We handle both pre- and post-change versions here. Please avoid kernel
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- * version tests like this as much as possible: they inflate the code, test,
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- * and maintenance burden.
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- */
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-#ifdef bio_dev
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- struct gendisk *bi_disk = bio->bi_disk;
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-#else
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struct gendisk *bi_disk = bio->bi_bdev->bd_disk;
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-#endif
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bpf_probe_read_kernel(&data.disk, sizeof(data.disk), bi_disk->disk_name);
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events.perf_submit(ctx, &data, sizeof(data));
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return 0;
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--
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2.31.1
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