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[autoboot] Introduce "skip-san-boot" option

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For some install-to-SAN scenarios, the OS needs to be able to reboot
to reread the partition table.  On this second boot attempt, the SAN
disk will not be empty and so iPXE will attempt to boot from it,
rather than falling back to the OS' installation media.

Work around this problem by introducing the "skip-san-boot" option,
similar in spirit to "keep-san".

Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Dave Hansen
2010-10-21 15:03:42 -07:00
committed by Michael Brown
parent 246624cdb8
commit 053d28688c
2 changed files with 27 additions and 6 deletions
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21
src/usr/autoboot.c
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@@ -136,6 +136,14 @@ struct setting keep_san_setting __setting = {
.type = &setting_type_int8,
};
/** The "skip-san-boot" setting */
struct setting skip_san_boot_setting __setting = {
.name = "skip-san-boot",
.description = "Do not boot the SAN drive after connecting",
.tag = DHCP_EB_SKIP_SAN_BOOT,
.type = &setting_type_int8,
};
/**
* Boot using root path
*
@@ -171,10 +179,15 @@ int boot_root_path ( const char *root_path ) {
goto err_describe;
}
printf ( "Booting from SAN device %#02x\n", drive );
rc = san_boot ( drive );
printf ( "Boot from SAN device %#02x failed: %s\n",
drive, strerror ( rc ) );
/* Boot from SAN device */
if ( fetch_intz_setting ( NULL, &skip_san_boot_setting) != 0 ) {
printf ( "Skipping boot from SAN device %#02x\n", drive );
} else {
printf ( "Booting from SAN device %#02x\n", drive );
rc = san_boot ( drive );
printf ( "Boot from SAN device %#02x failed: %s\n",
drive, strerror ( rc ) );
}
/* Leave drive registered, if instructed to do so */
if ( fetch_intz_setting ( NULL, &keep_san_setting ) != 0 ) {