grub: fix error stating the root device
grub-mkconfig (and possibly other commands) complains: error: cannot stat /dev/root Backport an upstream patch to fix the error. [YOCTO #2777] (From OE-Core rev: 5b7da937cd298abd6f8f0eecfede2810b157179f) Signed-off-by: Jesse Zhang <sen.zhang@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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@ -0,0 +1,64 @@
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Upstream-Status: Backport
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Patch is a slightly edited version from debian. Upstream link is:
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http://bzr.savannah.gnu.org/lh/grub/trunk/grub/revision/3318
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Description: Don't stat devices unless we have to
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Author: Vladimir Serbinenko <phcoder@gmail.com>
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Author: Colin Watson <cjwatson@ubuntu.com>
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Bug-Debian: http://bugs.debian.org/627587
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Forwarded: yes
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Applied-Upstream: http://bazaar.launchpad.net/~vcs-imports/grub/grub2-bzr/revision/3318
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Last-Update: 2011-05-31
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Index: b/grub-core/kern/emu/getroot.c
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===================================================================
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--- a/grub-core/kern/emu/getroot.c
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+++ b/grub-core/kern/emu/getroot.c
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@@ -358,7 +358,7 @@
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if (S_ISLNK (st.st_mode)) {
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#ifdef __linux__
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- if (strcmp (dir, "mapper") == 0) {
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+ if (strcmp (dir, "mapper") == 0 || strcmp (dir, "/dev/mapper") == 0) {
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/* Follow symbolic links under /dev/mapper/; the canonical name
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may be something like /dev/dm-0, but the names under
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/dev/mapper/ are more human-readable and so we prefer them if
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@@ -609,20 +609,27 @@
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if (os_dev)
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{
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- if (stat (os_dev, &st) >= 0)
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- dev = st.st_rdev;
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- else
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- grub_util_error ("cannot stat `%s'", os_dev);
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- free (os_dev);
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+ char *tmp = os_dev;
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+ os_dev = canonicalize_file_name (os_dev);
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+ free (tmp);
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}
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- else
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+
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+ if (os_dev)
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{
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- if (stat (dir, &st) >= 0)
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- dev = st.st_dev;
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- else
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- grub_util_error ("cannot stat `%s'", dir);
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+ if (strncmp (os_dev, "/dev/dm-", sizeof ("/dev/dm-") - 1) != 0)
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+ return os_dev;
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+ if (stat (os_dev, &st) < 0)
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+ grub_util_error ("cannot stat `%s'", os_dev);
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+ free (os_dev);
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+ dev = st.st_rdev;
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+ return grub_find_device ("/dev/mapper", dev);
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}
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+ if (stat (dir, &st) < 0)
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+ grub_util_error ("cannot stat `%s'", dir);
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+
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+ dev = st.st_dev;
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+
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#ifdef __CYGWIN__
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/* Cygwin specific function. */
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os_dev = grub_find_device (dir, dev);
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@ -13,7 +13,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=d32239bcb673463ab874e80d47fae504"
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DEPENDS = "autogen-native"
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RDEPENDS_${PN} = "diffutils freetype"
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PR = "r10"
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PR = "r11"
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SRC_URI = "ftp://ftp.gnu.org/gnu/grub/grub-${PV}.tar.gz \
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file://grub-install.in.patch \
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@ -24,6 +24,7 @@ SRC_URI = "ftp://ftp.gnu.org/gnu/grub/grub-${PV}.tar.gz \
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file://grub-1.99-gcc-4.7.0-strict-aliasing-errors.patch \
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file://grub-1.99-fix-enable_execute_stack-check.patch \
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file://remove-gets.patch \
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file://grub-1.99-lazy_stat.patch \
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file://40_custom"
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SRC_URI[md5sum] = "ca9f2a2d571b57fc5c53212d1d22e2b5"
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