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76 lines
2.4 KiB
76 lines
2.4 KiB
From 6af520a5b4d91cd0fd32ab6361ff4519505c7f47 Mon Sep 17 00:00:00 2001
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From: Xiao Ni <xni@redhat.com>
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Date: Tue, 17 Oct 2023 20:35:46 +0800
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Subject: [PATCH 163/165] mdadm/super1: Add MD_FEATURE_RAID0_LAYOUT if
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kernel>=5.4
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After and include kernel v5.4, it adds one feature bit MD_FEATURE_RAID0_LAYOUT.
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It must need to specify a layout for raid0 with more than one zone. But for
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raid0 with one zone, in fact it also has a defalut layout.
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Now for raid0 with one zone, *unknown* layout can be seen when running mdadm -D
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command. It's the reason that mdadm doesn't set MD_FEATURE_RAID0_LAYOUT for
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raid0 with one zone. Then in kernel space, super_1_validate sets mddev->layout
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to -1 because of no MD_FEATURE_RAID0_LAYOUT. In fact, in raid0 io path, it
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uses the default layout. Set raid0_need_layout to true if kernel_version<=v5.4.
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Fixes: 329dfc28debb ('Create: add support for RAID0 layouts.')
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Signed-off-by: Xiao Ni <xni@redhat.com>
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Reviewed-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
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Signed-off-by: Jes Sorensen <jes@trained-monkey.org>
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---
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super1.c | 19 ++++++++++++++++---
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1 file changed, 16 insertions(+), 3 deletions(-)
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diff --git a/super1.c b/super1.c
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index 856b0208..1da71b98 100644
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--- a/super1.c
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+++ b/super1.c
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@@ -1967,6 +1967,14 @@ fail_to_write:
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return 1;
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}
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+static bool has_raid0_layout(struct mdp_superblock_1 *sb)
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+{
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+ if (sb->level == 0 && sb->layout != 0)
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+ return true;
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+ else
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+ return false;
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+}
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+
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static int write_init_super1(struct supertype *st)
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{
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struct mdp_superblock_1 *sb = st->sb;
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@@ -1978,12 +1986,17 @@ static int write_init_super1(struct supertype *st)
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unsigned long long sb_offset;
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unsigned long long data_offset;
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long bm_offset;
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- int raid0_need_layout = 0;
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+ bool raid0_need_layout = false;
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+
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+ /* Since linux kernel v5.4, raid0 always has a layout */
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+ if (has_raid0_layout(sb) && get_linux_version() >= 5004000)
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+ raid0_need_layout = true;
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for (di = st->info; di; di = di->next) {
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if (di->disk.state & (1 << MD_DISK_JOURNAL))
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sb->feature_map |= __cpu_to_le32(MD_FEATURE_JOURNAL);
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- if (sb->level == 0 && sb->layout != 0) {
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+ if (has_raid0_layout(sb) && !raid0_need_layout) {
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+
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struct devinfo *di2 = st->info;
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unsigned long long s1, s2;
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s1 = di->dev_size;
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@@ -1995,7 +2008,7 @@ static int write_init_super1(struct supertype *st)
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s2 -= di2->data_offset;
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s2 /= __le32_to_cpu(sb->chunksize);
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if (s1 != s2)
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- raid0_need_layout = 1;
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+ raid0_need_layout = true;
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}
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}
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--
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2.40.1
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