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-rw-r--r--src/core/sanboot.c10
-rw-r--r--src/include/ipxe/sanboot.h10
-rw-r--r--src/interface/efi/efi_block.c177
3 files changed, 166 insertions, 31 deletions
diff --git a/src/core/sanboot.c b/src/core/sanboot.c
index 5b7a2165..e49a3f92 100644
--- a/src/core/sanboot.c
+++ b/src/core/sanboot.c
@@ -45,16 +45,6 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <ipxe/sanboot.h>
/**
- * Default SAN drive number
- *
- * The drive number is a meaningful concept only in a BIOS
- * environment, where it represents the INT13 drive number (0x80 for
- * the first hard disk). We retain it in other environments to allow
- * for a simple way for iPXE commands to refer to SAN drives.
- */
-#define SAN_DEFAULT_DRIVE 0x80
-
-/**
* Timeout for block device commands (in ticks)
*
* Underlying devices should ideally never become totally stuck.
diff --git a/src/include/ipxe/sanboot.h b/src/include/ipxe/sanboot.h
index a1b6d7f3..b11197f9 100644
--- a/src/include/ipxe/sanboot.h
+++ b/src/include/ipxe/sanboot.h
@@ -21,6 +21,16 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <ipxe/acpi.h>
#include <config/sanboot.h>
+/**
+ * Default SAN drive number
+ *
+ * The drive number is an externally defined concept only in a BIOS
+ * environment, where it represents the INT13 drive number (0x80 for
+ * the first hard disk). We retain it in other environments to allow
+ * for a simple way for iPXE commands to refer to SAN drives.
+ */
+#define SAN_DEFAULT_DRIVE 0x80
+
/** A SAN path */
struct san_path {
/** Containing SAN device */
diff --git a/src/interface/efi/efi_block.c b/src/interface/efi/efi_block.c
index 79ef7455..11d11156 100644
--- a/src/interface/efi/efi_block.c
+++ b/src/interface/efi/efi_block.c
@@ -299,8 +299,8 @@ static int efi_block_hook ( unsigned int drive, struct uri **uris,
DBGC ( drive, "EFIBLK %#02x has no device path\n", drive );
goto err_describe;
}
- DBGC ( drive, "EFIBLK %#02x has device path %s\n",
- drive, efi_devpath_text ( block->path ) );
+ DBGC2 ( drive, "EFIBLK %#02x has device path %s\n",
+ drive, efi_devpath_text ( block->path ) );
/* Install protocols */
if ( ( efirc = bs->InstallMultipleProtocolInterfaces (
@@ -313,6 +313,8 @@ static int efi_block_hook ( unsigned int drive, struct uri **uris,
drive, strerror ( rc ) );
goto err_install;
}
+ DBGC ( drive, "EFIBLK %#02x installed as SAN drive %s\n",
+ drive, efi_handle_name ( block->handle ) );
/* Connect all possible protocols */
efi_block_connect ( drive, block->handle );
@@ -783,6 +785,65 @@ static int efi_block_exec ( unsigned int drive,
}
/**
+ * Check that EFI block device is eligible for a local virtual drive number
+ *
+ * @v handle Block device handle
+ * @ret rc Return status code
+ *
+ * We assign virtual drive numbers for local (non-SAN) EFI block
+ * devices that represent complete disks, to provide roughly
+ * equivalent functionality to BIOS drive numbers.
+ */
+static int efi_block_local ( EFI_HANDLE handle ) {
+ EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
+ EFI_GUID *protocol = &efi_block_io_protocol_guid;
+ struct san_device *sandev;
+ struct efi_block_data *block;
+ union {
+ EFI_BLOCK_IO_PROTOCOL *blockio;
+ void *interface;
+ } u;
+ EFI_STATUS efirc;
+ int rc;
+
+ /* Check if handle belongs to a SAN device */
+ for_each_sandev ( sandev ) {
+ block = sandev->priv;
+ if ( handle == block->handle ) {
+ rc = -ENOTTY;
+ goto err_sandev;
+ }
+ }
+
+ /* Open block I/O protocol */
+ if ( ( efirc = bs->OpenProtocol ( handle, protocol, &u.interface,
+ efi_image_handle, handle,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL ))!=0){
+ rc = -EEFI ( efirc );
+ DBGC ( handle, "EFIBLK %s could not open block I/O: %s\n",
+ efi_handle_name ( handle ), strerror ( rc ) );
+ goto err_open;
+ }
+
+ /* Do not assign drive numbers for partitions */
+ if ( u.blockio->Media->LogicalPartition ) {
+ rc = -ENOTTY;
+ DBGC2 ( handle, "EFLBLK %s is a partition\n",
+ efi_handle_name ( handle ) );
+ goto err_partition;
+ }
+
+ /* Success */
+ rc = 0;
+
+ err_partition:
+ bs->CloseProtocol ( handle, protocol, efi_image_handle, handle );
+ err_open:
+ err_sandev:
+ return rc;
+}
+
+/**
* Boot from EFI block device
*
* @v drive Drive number
@@ -790,37 +851,111 @@ static int efi_block_exec ( unsigned int drive,
* @ret rc Return status code
*/
static int efi_block_boot ( unsigned int drive, const char *filename ) {
+ EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
EFI_DEVICE_PATH_PROTOCOL *fspath = NULL;
+ EFI_HANDLE *handles;
+ EFI_HANDLE handle;
+ UINTN count;
struct san_device *sandev;
struct efi_block_data *block;
+ unsigned int vdrive;
+ unsigned int index;
+ EFI_STATUS efirc;
int rc;
- /* Find SAN device */
- sandev = sandev_find ( drive );
- if ( ! sandev ) {
- DBGC ( drive, "EFIBLK %#02x is not a SAN drive\n", drive );
- rc = -ENODEV;
- goto err_sandev_find;
- }
- block = sandev->priv;
-
/* Release SNP devices */
efi_snp_release();
- /* Scan for a matching filesystem within this block device */
- if ( ( rc = efi_block_scan ( drive, block->handle, filename,
- &fspath ) ) != 0 ) {
- goto err_scan;
+ /* Locate all block I/O protocol handles */
+ if ( ( efirc = bs->LocateHandleBuffer ( ByProtocol,
+ &efi_block_io_protocol_guid,
+ NULL, &count,
+ &handles ) ) != 0 ) {
+ rc = -EEFI ( efirc );
+ DBGC ( drive, "EFIBLK %#02x cannot locate block I/O: %s\n",
+ drive, strerror ( rc ) );
+ goto err_locate_block_io;
}
- /* Attempt to boot from this filesystem */
- if ( ( rc = efi_block_exec ( drive, fspath, filename ) ) != 0 )
- goto err_exec;
+ /* Try booting from the first matching block device, if any */
+ rc = -ENOENT;
+ for ( vdrive = 0, index = 0 ; ; vdrive++ ) {
+
+ /* Identify next drive number and block I/O handle */
+ if ( ( sandev = sandev_next ( vdrive ) ) &&
+ ( ( sandev->drive == vdrive ) ||
+ ( sandev->drive <= SAN_DEFAULT_DRIVE ) ||
+ ( index >= count ) ) ) {
+
+ /* There is a SAN drive that either:
+ *
+ * a) has the current virtual drive number, or
+ * b) has a drive number below SAN_DEFAULT_DRIVE, or
+ * c) has a drive number higher than any local drive
+ *
+ * Use this SAN drive, since the explicit SAN
+ * drive numbering takes precedence over the
+ * implicit local drive numbering.
+ */
+ block = sandev->priv;
+ handle = block->handle;
+
+ /* Use SAN drive's explicit drive number */
+ vdrive = sandev->drive;
+ DBGC ( vdrive, "EFIBLK %#02x is SAN drive %s\n",
+ vdrive, efi_handle_name ( handle ) );
+
+ } else if ( index < count ) {
+
+ /* There is no SAN drive meeting any of the
+ * above criteria. Try the next block I/O
+ * handle.
+ */
+ handle = handles[index++];
+
+ /* Check if this handle is eligible to be
+ * given a local virtual drive number.
+ */
+ if ( ( rc = efi_block_local ( handle ) ) != 0 ) {
+ /* Do not consume virtual drive number */
+ vdrive--;
+ continue;
+ }
+
+ /* Use the current virtual drive number, with
+ * a minimum of SAN_DEFAULT_DRIVE to match
+ * typical BIOS drive numbering.
+ */
+ if ( vdrive < SAN_DEFAULT_DRIVE )
+ vdrive = SAN_DEFAULT_DRIVE;
+ DBGC ( vdrive, "EFIBLK %#02x is local drive %s\n",
+ vdrive, efi_handle_name ( handle ) );
+
+ } else {
+
+ /* No more SAN or local drives */
+ break;
+ }
+
+ /* Skip non-matching drives */
+ if ( drive && ( drive != vdrive ) )
+ continue;
+ DBGC ( vdrive, "EFIBLK %#02x attempting to boot\n", vdrive );
+
+ /* Scan for a matching filesystem within this drive */
+ if ( ( rc = efi_block_scan ( vdrive, handle, filename,
+ &fspath ) ) != 0 ) {
+ continue;
+ }
- err_exec:
- err_scan:
+ /* Attempt to boot from the matched filesystem */
+ rc = efi_block_exec ( vdrive, fspath, filename );
+ break;
+ }
+
+ bs->FreePool ( handles );
+ err_locate_block_io:
efi_snp_claim();
- err_sandev_find:
return rc;
}
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-05-18 02:25:52 +0200