forked from pool/bcache-tools
51 lines
1.7 KiB
Diff
51 lines
1.7 KiB
Diff
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From 33b90323056f65225c5b557d7f578b7f37abee3c Mon Sep 17 00:00:00 2001
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From: Coly Li <colyli@suse.de>
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Date: Sat, 16 May 2020 21:57:17 +0800
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Subject: [PATCH 03/17] bcache-tools: convert writeback to writethrough mode
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for zoned backing device
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Git-commit: 33b90323056f65225c5b557d7f578b7f37abee3c
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Patch-mainline: bcache-tools-1.1
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References: jsc#SLE-9807
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Currently bcache does not support writeback cache mode for zoned device
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as backing device.
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If the backing device is zoned device, and cache mode is explicitly set
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to writeback mode, a information will be print to terminal,
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"Zoned device <device name> detected: convert to writethrough mode."
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Then the cache mode will be automatically converted to writethrough,
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which is the default cache mode of bcache-tools.
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Signed-off-by: Coly Li <colyli@suse.de>
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---
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make.c | 13 +++++++++++++
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1 file changed, 13 insertions(+)
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diff --git a/make.c b/make.c
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index c1090a6..cc76863 100644
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--- a/make.c
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+++ b/make.c
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@@ -378,6 +378,19 @@ static void write_sb(char *dev, unsigned int block_size,
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SET_BDEV_CACHE_MODE(&sb, writeback ?
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CACHE_MODE_WRITEBACK : CACHE_MODE_WRITETHROUGH);
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+ /*
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+ * Currently bcache does not support writeback mode for
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+ * zoned device as backing device. If the cache mode is
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+ * explicitly set to writeback, automatically convert to
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+ * writethough mode.
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+ */
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+ if (is_zoned_device(dev) &&
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+ BDEV_CACHE_MODE(&sb) == CACHE_MODE_WRITEBACK) {
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+ printf("Zoned device %s detected: convert to writethrough mode.\n\n",
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+ dev);
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+ SET_BDEV_CACHE_MODE(&sb, CACHE_MODE_WRITETHROUGH);
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+ }
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+
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if (data_offset != BDEV_DATA_START_DEFAULT) {
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sb.version = BCACHE_SB_VERSION_BDEV_WITH_OFFSET;
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sb.data_offset = data_offset;
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--
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2.26.2
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