grub2/grub2-getroot-support-nvdimm.patch

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From 889c0894d358e48c02f8225426893094f20004e5 Mon Sep 17 00:00:00 2001
From: Gary Lin <glin@suse.com>
Date: Thu, 4 Oct 2018 10:32:07 +0800
Subject: [PATCH] linux/getroot: Support NVDIMM device names
There are two types of NVDIMM block devices in linux: fsdax and blk.
For fsdax, the device name would be /dev/pmemXpY, /dev/pmemXsY,
/dev/pmemX.YpZ, or /dev/pmemX.YsZ.
For blk, the name would be /dev/ndblkX.YpZ or /dev/ndblkX.YsZ
---
grub-core/osdep/linux/getroot.c | 44 +++++++++++++++++++++++++++++++++
1 file changed, 44 insertions(+)
diff --git a/grub-core/osdep/linux/getroot.c b/grub-core/osdep/linux/getroot.c
index 8776009..d2ab60f 100644
--- a/grub-core/osdep/linux/getroot.c
+++ b/grub-core/osdep/linux/getroot.c
@@ -1082,6 +1082,50 @@ grub_util_part_to_disk (const char *os_dev, struct stat *st,
*pp = '\0';
return path;
}
+
+ /* If this is a NVDIMM device in fsdax mode */
+ if (strncmp ("pmem", p, 4) == 0 && p[4] >= '0' && p[4] <= '9')
+ {
+ /* /dev/pmem[0-9]+(\.[0-9]+)?((p[0-9]+)?|s[0-9]*) */
+ char *pp = strchr (p + 4, 'p');
+ if (pp)
+ {
+ *is_part = 1;
+ *pp = '\0';
+ }
+ else
+ {
+ pp = strchr (p + 4, 's');
+ if (pp && pp[1] >= '0' && pp[1] <= '9')
+ {
+ *is_part = 1;
+ pp[1] = '\0';
+ }
+ }
+ return path;
+ }
+
+ /* If this is a NVDIMM device in block mode */
+ if (strncmp ("ndblk", p, 5) == 0 && p[5] >= '0' && p[5] <= '9')
+ {
+ /* /dev/ndblk[0-9]+\.[0-9]+((p[0-9]+)?|s[0-9]*) */
+ char *pp = strchr (p + 5, 'p');
+ if (pp)
+ {
+ *is_part = 1;
+ *pp = '\0';
+ }
+ else
+ {
+ pp = strchr (p + 5, 's');
+ if (pp && pp[1] >= '0' && pp[1] <= '9')
+ {
+ *is_part = 1;
+ pp[1] = '\0';
+ }
+ }
+ return path;
+ }
}
return path;
--
2.19.0