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[sanboot] Add "sanhook" and "sanunhook" commands

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Expose the multiple-SAN-drive capability of the iPXE core via the iPXE
command line by adding commands to hook and unhook additional drives.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2011-04-23 09:50:38 +01:00
parent 3ca5656208
commit 5d2802e403
10 changed files with 230 additions and 92 deletions
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3
src/arch/i386/include/int13.h
View File

@@ -261,7 +261,4 @@ struct master_boot_record {
uint16_t magic;
} __attribute__ (( packed ));
/** Use natural BIOS drive number */
#define INT13_USE_NATURAL_DRIVE 0xff
#endif /* INT13_H */

11
src/arch/i386/include/ipxe/bios_sanboot.h
View File

@@ -15,4 +15,15 @@ FILE_LICENCE ( GPL2_OR_LATER );
#define SANBOOT_PREFIX_pcbios __pcbios_
#endif
/**
* Get default SAN drive number
*
* @ret drive Default drive number
*/
static inline __always_inline unsigned int
SANBOOT_INLINE ( pcbios, san_default_drive ) ( void ) {
/* Default to booting from first hard disk */
return 0x80;
}
#endif /* _IPXE_BIOS_SANBOOT_H */

12
src/arch/i386/interface/pcbios/int13.c
View File

@@ -1164,8 +1164,8 @@ static void int13_free ( struct refcnt *refcnt ) {
* Hook INT 13 emulated drive
*
* @v uri URI
* @v drive Requested drive number
* @ret drive Assigned drive number, or negative error
* @v drive Drive number
* @ret rc Return status code
*
* Registers the drive with the INT 13 emulation subsystem, and hooks
* the INT 13 interrupt vector (if not already hooked).
@@ -1176,12 +1176,9 @@ static int int13_hook ( struct uri *uri, unsigned int drive ) {
unsigned int natural_drive;
int rc;
/* Calculate drive number */
/* Calculate natural drive number */
get_real ( num_drives, BDA_SEG, BDA_NUM_DRIVES );
natural_drive = ( num_drives | 0x80 );
if ( drive == INT13_USE_NATURAL_DRIVE )
drive = natural_drive;
drive |= 0x80;
/* Check that drive number is not in use */
list_for_each_entry ( int13, &int13s, list ) {
@@ -1231,7 +1228,7 @@ static int int13_hook ( struct uri *uri, unsigned int drive ) {
/* Update BIOS drive count */
int13_set_num_drives();
return int13->drive;
return 0;
err_guess_geometry:
err_reopen_block:
@@ -1428,6 +1425,7 @@ static int int13_describe ( unsigned int drive ) {
return 0;
}
PROVIDE_SANBOOT_INLINE ( pcbios, san_default_drive );
PROVIDE_SANBOOT ( pcbios, san_hook, int13_hook );
PROVIDE_SANBOOT ( pcbios, san_unhook, int13_unhook );
PROVIDE_SANBOOT ( pcbios, san_boot, int13_boot );