forked from pool/bcache-tools
Jan Engelhardt
fe813a0354
- bcache-tools: improve is_zoned_device() (bsc#1208425) 0029-bcache-tools-improve-is_zoned_device.patch OBS-URL: https://build.opensuse.org/request/show/1068623 OBS-URL: https://build.opensuse.org/package/show/filesystems/bcache-tools?expand=0&rev=35
57 lines
1.6 KiB
Diff
57 lines
1.6 KiB
Diff
From a5e3753516bd39c431def86c8dfec8a9cea1ddd4 Mon Sep 17 00:00:00 2001
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From: Coly Li <colyli@suse.de>
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Date: Fri, 17 Feb 2023 21:08:10 +0800
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Subject: [PATCH] bcache-tools: improve is_zoned_device()
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Git-commit: a5e3753516bd39c431def86c8dfec8a9cea1ddd4
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References: bsc#1208425
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To check whether a block device is zoned or not, is_zoned_device()
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returns true when /sys/block/<device>/queue/chunk_sectors is not zero.
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Now there are devices which are not zoned devices but has non-zero
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chunk-sectors values. For such situation, the more accurate method is
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to read file /sys/block/<device>/queue/zoned. If the content is not
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string "none", this device is not a zoned device. Otherwise (e.g.
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"host-aware" or "host- managed"), it is a zoned device.
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For elder kernel if the above sysfs file doesn't exist, get_zone_size()
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is still called by is_zoned_device() for compatibility.
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Signed-off-by: Coly Li <colyli@suse.de>
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---
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zoned.c | 19 +++++++++++++++++++
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1 file changed, 19 insertions(+)
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diff --git a/zoned.c b/zoned.c
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index d078286..f214787 100644
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--- a/zoned.c
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+++ b/zoned.c
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@@ -90,5 +90,24 @@ void check_data_offset_for_zoned_device(char *devname,
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int is_zoned_device(char *devname)
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{
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+ char str[128];
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+ FILE *file;
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+ int res;
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+
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+ snprintf(str, sizeof(str),
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+ "/sys/block/%s/queue/zoned",
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+ basename(devname));
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+ file = fopen(str, "r");
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+ if (file) {
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+ memset(str, 0, sizeof(str));
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+ res = fscanf(file, "%s", str);
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+ fclose(file);
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+
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+ /* "none" indicates non-zoned device */
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+ if (res == 1)
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+ return !(strcmp(str, "none") == 0);
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+ }
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+
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+ /* Only used when "zoned" file doesn't exist */
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return (get_zone_size(devname) != 0);
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}
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--
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2.39.2
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