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

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>
pull/5/head
Michael Brown 2011-04-23 09:50:38 +01:00
parent 3ca5656208
commit 5d2802e403
10 changed files with 230 additions and 92 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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 );

1
src/core/null_sanboot.c
View File

@ -38,6 +38,7 @@ static int null_san_describe ( unsigned int drive __unused ) {
return -EOPNOTSUPP;
}
PROVIDE_SANBOOT_INLINE ( null, san_default_drive );
PROVIDE_SANBOOT ( null, san_hook, null_san_hook );
PROVIDE_SANBOOT ( null, san_unhook, null_san_unhook );
PROVIDE_SANBOOT ( null, san_boot, null_san_boot );

164
src/hci/commands/sanboot_cmd.c
View File

@ -23,6 +23,7 @@
#include <ipxe/command.h>
#include <ipxe/parseopt.h>
#include <ipxe/uri.h>
#include <ipxe/sanboot.h>
#include <usr/autoboot.h>
FILE_LICENCE ( GPL2_OR_LATER );
@ -34,15 +35,112 @@ FILE_LICENCE ( GPL2_OR_LATER );
*/
/** "sanboot" options */
struct sanboot_options {};
struct sanboot_options {
/** Drive number */
unsigned int drive;
/** Do not describe SAN device */
int no_describe;
/** Keep SAN device */
int keep;
};
/** "sanboot" option list */
static struct option_descriptor sanboot_opts[] = {};
static struct option_descriptor sanboot_opts[] = {
OPTION_DESC ( "drive", 'd', required_argument,
struct sanboot_options, drive, parse_integer ),
OPTION_DESC ( "no-describe", 'n', no_argument,
struct sanboot_options, no_describe, parse_flag ),
OPTION_DESC ( "keep", 'k', no_argument,
struct sanboot_options, keep, parse_flag ),
};
/** "sanhook" command descriptor */
static struct command_descriptor sanhook_cmd =
COMMAND_DESC ( struct sanboot_options, sanboot_opts, 1, 1,
"[--drive <drive>] [--no-describe] <root-path>" );
/** "sanboot" command descriptor */
static struct command_descriptor sanboot_cmd =
COMMAND_DESC ( struct sanboot_options, sanboot_opts, 1, 1,
"<root-path>" );
COMMAND_DESC ( struct sanboot_options, sanboot_opts, 0, 1,
"[--drive <drive>] [--no-describe] [--keep] "
"[<root-path>]" );
/** "sanunhook" command descriptor */
static struct command_descriptor sanunhook_cmd =
COMMAND_DESC ( struct sanboot_options, sanboot_opts, 0, 0,
"[--drive <drive>]" );
/**
* The "sanboot", "sanhook" and "sanunhook" commands
*
* @v argc Argument count
* @v argv Argument list
* @v default_flags Default set of flags for uriboot()
* @v no_root_path_flags Additional flags to apply if no root path is present
* @ret rc Return status code
*/
static int sanboot_core_exec ( int argc, char **argv,
struct command_descriptor *cmd,
int default_flags, int no_root_path_flags ) {
struct sanboot_options opts;
const char *root_path;
struct uri *uri;
int flags;
int rc;
/* Initialise options */
memset ( &opts, 0, sizeof ( opts ) );
opts.drive = san_default_drive();
/* Parse options */
if ( ( rc = reparse_options ( argc, argv, cmd, &opts ) ) != 0 )
goto err_parse_options;
/* Parse root path, if present */
if ( argc > optind ) {
root_path = argv[optind];
uri = parse_uri ( root_path );
if ( ! uri ) {
rc = -ENOMEM;
goto err_parse_uri;
}
} else {
root_path = NULL;
uri = NULL;
}
/* Construct flags */
flags = default_flags;
if ( opts.no_describe )
flags |= URIBOOT_NO_SAN_DESCRIBE;
if ( opts.keep )
flags |= URIBOOT_NO_SAN_UNHOOK;
if ( ! root_path )
flags |= no_root_path_flags;
/* Boot from root path */
if ( ( rc = uriboot ( NULL, uri, opts.drive, flags ) ) != 0 )
goto err_uriboot;
err_uriboot:
uri_put ( uri );
err_parse_uri:
err_parse_options:
return rc;
}
/**
* The "sanhook" command
*
* @v argc Argument count
* @v argv Argument list
* @ret rc Return status code
*/
static int sanhook_exec ( int argc, char **argv ) {
return sanboot_core_exec ( argc, argv, &sanhook_cmd,
( URIBOOT_NO_SAN_BOOT |
URIBOOT_NO_SAN_UNHOOK ), 0 );
}
/**
* The "sanboot" command
@ -52,39 +150,35 @@ static struct command_descriptor sanboot_cmd =
* @ret rc Return status code
*/
static int sanboot_exec ( int argc, char **argv ) {
struct sanboot_options opts;
const char *root_path;
struct uri *uri;
int rc;
return sanboot_core_exec ( argc, argv, &sanboot_cmd,
0, URIBOOT_NO_SAN_UNHOOK );
}
/* Parse options */
if ( ( rc = parse_options ( argc, argv, &sanboot_cmd, &opts ) ) != 0 )
goto err_parse_options;
/* Parse root path */
root_path = argv[optind];
uri = parse_uri ( root_path );
if ( ! uri ) {
rc = -ENOMEM;
goto err_parse_uri;
}
/* Boot from root path */
if ( ( rc = uriboot ( NULL, uri ) ) != 0 ) {
printf ( "Could not boot from %s: %s\n",
root_path, strerror ( rc ) );
goto err_uriboot;
}
err_uriboot:
uri_put ( uri );
err_parse_uri:
err_parse_options:
return rc;
/**
* The "sanunhook" command
*
* @v argc Argument count
* @v argv Argument list
* @ret rc Return status code
*/
static int sanunhook_exec ( int argc, char **argv ) {
return sanboot_core_exec ( argc, argv, &sanunhook_cmd,
( URIBOOT_NO_SAN_DESCRIBE |
URIBOOT_NO_SAN_BOOT ), 0 );
}
/** SAN commands */
struct command sanboot_command __command = {
.name = "sanboot",
.exec = sanboot_exec,
struct command sanboot_commands[] __command = {
{
.name = "sanhook",
.exec = sanhook_exec,
},
{
.name = "sanboot",
.exec = sanboot_exec,
},
{
.name = "sanunhook",
.exec = sanunhook_exec,
},
};

5
src/include/ipxe/null_sanboot.h
View File

@ -15,4 +15,9 @@ FILE_LICENCE ( GPL2_OR_LATER );
#define SANBOOT_PREFIX_null __null_
#endif
static inline __always_inline unsigned int
SANBOOT_INLINE ( null, san_default_drive ) ( void ) {
return 0;
}
#endif /* _IPXE_NULL_SANBOOT_H */

11
src/include/ipxe/sanboot.h
View File

@ -58,12 +58,19 @@ struct uri;
/* Include all architecture-dependent sanboot API headers */
#include <bits/sanboot.h>
/**
* Get default SAN drive number
*
* @ret drive Default drive number
*/
unsigned int san_default_drive ( void );
/**
* Hook SAN device
*
* @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
*/
int san_hook ( struct uri *uri, unsigned int drive );

14
src/include/usr/autoboot.h
View File

@ -14,7 +14,19 @@ struct net_device;
struct uri;
struct settings;
extern int uriboot ( struct uri *filename, struct uri *root_path );
/** uriboot() flags */
enum uriboot_flags {
URIBOOT_NO_SAN_DESCRIBE = 0x0001,
URIBOOT_NO_SAN_BOOT = 0x0002,
URIBOOT_NO_SAN_UNHOOK = 0x0004,
};
#define URIBOOT_NO_SAN ( URIBOOT_NO_SAN_DESCRIBE | \
URIBOOT_NO_SAN_BOOT | \
URIBOOT_NO_SAN_UNHOOK )
extern int uriboot ( struct uri *filename, struct uri *root_path, int drive,
unsigned int flags );
extern struct uri *
fetch_next_server_and_filename ( struct settings *settings );
extern int netboot ( struct net_device *netdev );

99
src/usr/autoboot.c
View File

@ -119,54 +119,37 @@ struct setting skip_san_boot_setting __setting ( SETTING_SANBOOT_EXTRA ) = {
*
* @v filename Filename
* @v root_path Root path
* @v drive SAN drive (if applicable)
* @v flags Boot action flags
* @ret rc Return status code
*
* The somewhat tortuous flow of control in this function exists in
* order to ensure that the "sanboot" command remains identical in
* function to a SAN boot via a DHCP-specified root path, and to
* provide backwards compatibility for the "keep-san" and
* "skip-san-boot" options.
*/
int uriboot ( struct uri *filename, struct uri *root_path ) {
int drive;
int uriboot ( struct uri *filename, struct uri *root_path, int drive,
unsigned int flags ) {
int rc;
/* Treat empty URIs as absent */
if ( filename && ( ! uri_has_path ( filename ) ) )
filename = NULL;
if ( root_path && ( ! uri_is_absolute ( root_path ) ) )
root_path = NULL;
/* If we have both a filename and a root path, ignore an
* unsupported URI scheme in the root path, since it may
* represent an NFS root.
*/
if ( filename && root_path &&
( xfer_uri_opener ( root_path->scheme ) == NULL ) ) {
printf ( "Ignoring unsupported root path\n" );
root_path = NULL;
}
/* Check that we have something to boot */
if ( ! ( filename || root_path ) ) {
rc = -ENOENT_BOOT;
printf ( "Nothing to boot: %s\n", strerror ( rc ) );
goto err_no_boot;
}
/* Hook SAN device, if applicable */
if ( root_path ) {
drive = san_hook ( root_path, 0 );
if ( drive < 0 ) {
rc = drive;
if ( ( rc = san_hook ( root_path, drive ) ) != 0 ) {
printf ( "Could not open SAN device: %s\n",
strerror ( rc ) );
goto err_san_hook;
}
printf ( "Registered as SAN device %#02x\n", drive );
} else {
drive = -ENODEV;
printf ( "Registered SAN device %#02x\n", drive );
}
/* Describe SAN device, if applicable */
if ( ( drive >= 0 ) && ( ( rc = san_describe ( drive ) ) != 0 ) ) {
printf ( "Could not describe SAN device %#02x: %s\n",
drive, strerror ( rc ) );
goto err_san_describe;
if ( ( drive >= 0 ) && ! ( flags & URIBOOT_NO_SAN_DESCRIBE ) ) {
if ( ( rc = san_describe ( drive ) ) != 0 ) {
printf ( "Could not describe SAN device %#02x: %s\n",
drive, strerror ( rc ) );
goto err_san_describe;
}
}
/* Allow a root-path-only boot with skip-san enabled to succeed */
@ -192,7 +175,7 @@ int uriboot ( struct uri *filename, struct uri *root_path ) {
}
/* Attempt SAN boot if applicable */
if ( root_path ) {
if ( ( drive >= 0 ) && ! ( flags & URIBOOT_NO_SAN_BOOT ) ) {
if ( fetch_intz_setting ( NULL, &skip_san_boot_setting) == 0 ) {
printf ( "Booting from SAN device %#02x\n", drive );
rc = san_boot ( drive );
@ -209,17 +192,15 @@ int uriboot ( struct uri *filename, struct uri *root_path ) {
err_san_describe:
/* Unhook SAN device, if applicable */
if ( drive >= 0 ) {
if ( ( drive >= 0 ) && ! ( flags & URIBOOT_NO_SAN_UNHOOK ) ) {
if ( fetch_intz_setting ( NULL, &keep_san_setting ) == 0 ) {
printf ( "Unregistering SAN device %#02x\n", drive );
san_unhook ( drive );
printf ( "Unregistered SAN device %#02x\n", drive );
} else {
printf ( "Preserving connection to SAN device %#02x\n",
drive );
printf ( "Preserving SAN device %#02x\n", drive );
}
}
err_san_hook:
err_no_boot:
return rc;
}
@ -360,19 +341,51 @@ int netboot ( struct net_device *netdev ) {
goto err_pxe_menu_boot;
}
/* Fetch next server, filename and root path */
/* Fetch next server and filename */
filename = fetch_next_server_and_filename ( NULL );
if ( ! filename )
goto err_filename;
if ( ! uri_has_path ( filename ) ) {
/* Ignore empty filename */
uri_put ( filename );
filename = NULL;
}
/* Fetch root path */
root_path = fetch_root_path ( NULL );
if ( ! root_path )
goto err_root_path;
if ( ! uri_is_absolute ( root_path ) ) {
/* Ignore empty root path */
uri_put ( root_path );
root_path = NULL;
}
/* If we have both a filename and a root path, ignore an
* unsupported URI scheme in the root path, since it may
* represent an NFS root.
*/
if ( filename && root_path &&
( xfer_uri_opener ( root_path->scheme ) == NULL ) ) {
printf ( "Ignoring unsupported root path\n" );
uri_put ( root_path );
root_path = NULL;
}
/* Check that we have something to boot */
if ( ! ( filename || root_path ) ) {
rc = -ENOENT_BOOT;
printf ( "Nothing to boot: %s\n", strerror ( rc ) );
goto err_no_boot;
}
/* Boot using next server, filename and root path */
if ( ( rc = uriboot ( filename, root_path ) ) != 0 )
if ( ( rc = uriboot ( filename, root_path, san_default_drive(),
( root_path ? 0 : URIBOOT_NO_SAN ) ) ) != 0 )
goto err_uriboot;
err_uriboot:
err_no_boot:
uri_put ( root_path );
err_root_path:
uri_put ( filename );

2
src/usr/pxemenu.c
View File

@ -377,7 +377,7 @@ int pxe_menu_boot ( struct net_device *netdev ) {
return -ENOMEM;
/* Attempt boot */
rc = uriboot ( uri, NULL );
rc = uriboot ( uri, NULL, 0, URIBOOT_NO_SAN );
uri_put ( uri );
return rc;
}