experimental support for chromium os (fydeos/cloudready)

GRUB2/MOD_SRC/grub-2.04/grub-core/partmap/gpt.c

@@ -0,0 +1,232 @@
+/* gpt.c - Read GUID Partition Tables (GPT).  */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2002,2005,2006,2007,2008  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/disk.h>
+#include <grub/misc.h>
+#include <grub/mm.h>
+#include <grub/partition.h>
+#include <grub/dl.h>
+#include <grub/msdos_partition.h>
+#include <grub/gpt_partition.h>
+#include <grub/i18n.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+static grub_uint8_t grub_gpt_magic[8] =
+  {
+    0x45, 0x46, 0x49, 0x20, 0x50, 0x41, 0x52, 0x54
+  };
+
+static const grub_gpt_part_guid_t grub_gpt_partition_type_empty = GRUB_GPT_PARTITION_TYPE_EMPTY;
+
+#ifdef GRUB_UTIL
+static const grub_gpt_part_guid_t grub_gpt_partition_type_bios_boot = GRUB_GPT_PARTITION_TYPE_BIOS_BOOT;
+#endif
+
+/* 512 << 7 = 65536 byte sectors.  */
+#define MAX_SECTOR_LOG 7
+
+static struct grub_partition_map grub_gpt_partition_map;
+
+
+
+grub_err_t
+grub_gpt_partition_map_iterate (grub_disk_t disk,
+				grub_partition_iterate_hook_t hook,
+				void *hook_data)
+{
+  struct grub_partition part;
+  struct grub_gpt_header gpt;
+  struct grub_gpt_partentry entry;
+  struct grub_msdos_partition_mbr mbr;
+  grub_uint64_t entries;
+  unsigned int i;
+  int last_offset = 0;
+  int sector_log = 0;
+
+  /* Read the protective MBR.  */
+  if (grub_disk_read (disk, 0, 0, sizeof (mbr), &mbr))
+    return grub_errno;
+
+  /* Check if it is valid.  */
+  if (mbr.signature != grub_cpu_to_le16_compile_time (GRUB_PC_PARTITION_SIGNATURE))
+    return grub_error (GRUB_ERR_BAD_PART_TABLE, "no signature");
+
+  /* Make sure the MBR is a protective MBR and not a normal MBR.  */
+  for (i = 0; i < 4; i++)
+    if (mbr.entries[i].type == GRUB_PC_PARTITION_TYPE_GPT_DISK)
+      break;
+  if (i == 4)
+    return grub_error (GRUB_ERR_BAD_PART_TABLE, "no GPT partition map found");
+
+  /* Read the GPT header.  */
+  for (sector_log = 0; sector_log < MAX_SECTOR_LOG; sector_log++)
+    {
+      if (grub_disk_read (disk, 1 << sector_log, 0, sizeof (gpt), &gpt))
+	return grub_errno;
+
+      if (grub_memcmp (gpt.magic, grub_gpt_magic, sizeof (grub_gpt_magic)) == 0)
+	break;
+    }
+  if (sector_log == MAX_SECTOR_LOG)
+    return grub_error (GRUB_ERR_BAD_PART_TABLE, "no valid GPT header");
+
+  grub_dprintf ("gpt", "Read a valid GPT header\n");
+
+  entries = grub_le_to_cpu64 (gpt.partitions) << sector_log;
+  for (i = 0; i < grub_le_to_cpu32 (gpt.maxpart); i++)
+    {
+      if (grub_disk_read (disk, entries, last_offset,
+			  sizeof (entry), &entry))
+	return grub_errno;
+
+      if (grub_memcmp (&grub_gpt_partition_type_empty, &entry.type,
+		       sizeof (grub_gpt_partition_type_empty)))
+	{
+	  /* Calculate the first block and the size of the partition.  */
+	  part.start = grub_le_to_cpu64 (entry.start) << sector_log;
+	  part.len = (grub_le_to_cpu64 (entry.end)
+		      - grub_le_to_cpu64 (entry.start) + 1)  << sector_log;
+	  part.offset = entries;
+	  part.number = i;
+	  part.index = last_offset;
+	  part.partmap = &grub_gpt_partition_map;
+	  part.parent = disk->partition;
+      part.gpt_attrib = entry.attrib;
+
+	  grub_dprintf ("gpt", "GPT entry %d: start=%lld, length=%lld\n", i,
+			(unsigned long long) part.start,
+			(unsigned long long) part.len);
+
+	  if (hook (disk, &part, hook_data))
+	    return grub_errno;
+	}
+
+      last_offset += grub_le_to_cpu32 (gpt.partentry_size);
+      if (last_offset == GRUB_DISK_SECTOR_SIZE)
+	{
+	  last_offset = 0;
+	  entries++;
+	}
+    }
+
+  return GRUB_ERR_NONE;
+}
+
+#ifdef GRUB_UTIL
+/* Context for gpt_partition_map_embed.  */
+struct gpt_partition_map_embed_ctx
+{
+  grub_disk_addr_t start, len;
+};
+
+/* Helper for gpt_partition_map_embed.  */
+static int
+find_usable_region (grub_disk_t disk __attribute__ ((unused)),
+		    const grub_partition_t p, void *data)
+{
+  struct gpt_partition_map_embed_ctx *ctx = data;
+  struct grub_gpt_partentry gptdata;
+  grub_partition_t p2;
+
+  p2 = disk->partition;
+  disk->partition = p->parent;
+  if (grub_disk_read (disk, p->offset, p->index,
+		      sizeof (gptdata), &gptdata))
+    {
+      disk->partition = p2;
+      return 0;
+    }
+  disk->partition = p2;
+
+  /* If there's an embed region, it is in a dedicated partition.  */
+  if (! grub_memcmp (&gptdata.type, &grub_gpt_partition_type_bios_boot, 16))
+    {
+      ctx->start = p->start;
+      ctx->len = p->len;
+      return 1;
+    }
+
+  return 0;
+}
+
+static grub_err_t
+gpt_partition_map_embed (struct grub_disk *disk, unsigned int *nsectors,
+			 unsigned int max_nsectors,
+			 grub_embed_type_t embed_type,
+			 grub_disk_addr_t **sectors)
+{
+  struct gpt_partition_map_embed_ctx ctx = {
+    .start = 0,
+    .len = 0
+  };
+  unsigned i;
+  grub_err_t err;
+
+  if (embed_type != GRUB_EMBED_PCBIOS)
+    return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
+		       "GPT currently supports only PC-BIOS embedding");
+
+  err = grub_gpt_partition_map_iterate (disk, find_usable_region, &ctx);
+  if (err)
+    return err;
+
+  if (ctx.len == 0)
+    return grub_error (GRUB_ERR_FILE_NOT_FOUND,
+		       N_("this GPT partition label contains no BIOS Boot Partition;"
+			  " embedding won't be possible"));
+
+  if (ctx.len < *nsectors)
+    return grub_error (GRUB_ERR_OUT_OF_RANGE,
+		       N_("your BIOS Boot Partition is too small;"
+			  " embedding won't be possible"));
+
+  *nsectors = ctx.len;
+  if (*nsectors > max_nsectors)
+    *nsectors = max_nsectors;
+  *sectors = grub_malloc (*nsectors * sizeof (**sectors));
+  if (!*sectors)
+    return grub_errno;
+  for (i = 0; i < *nsectors; i++)
+    (*sectors)[i] = ctx.start + i;
+
+  return GRUB_ERR_NONE;
+}
+#endif
+
+
+/* Partition map type.  */
+static struct grub_partition_map grub_gpt_partition_map =
+  {
+    .name = "gpt",
+    .iterate = grub_gpt_partition_map_iterate,
+#ifdef GRUB_UTIL
+    .embed = gpt_partition_map_embed
+#endif
+  };
+
+GRUB_MOD_INIT(part_gpt)
+{
+  grub_partition_map_register (&grub_gpt_partition_map);
+}
+
+GRUB_MOD_FINI(part_gpt)
+{
+  grub_partition_map_unregister (&grub_gpt_partition_map);
+}

GRUB2/MOD_SRC/grub-2.04/grub-core/ventoy/ventoy_cmd.c

@@ -3491,9 +3491,11 @@ end:
 
 static int ventoy_img_partition_callback (struct grub_disk *disk, const grub_partition_t partition, void *data)
 {
+    int *pCnt = (int *)data;
+    
     (void)disk;
-    (void)data;
 
+    (*pCnt)++;
     g_part_list_pos += grub_snprintf(g_part_list_buf + g_part_list_pos, VTOY_MAX_SCRIPT_BUF - g_part_list_pos,
         "0 %llu linear /dev/ventoy %llu\n",
         (ulonglong)partition->len, (ulonglong)partition->start);
@@ -3503,6 +3505,7 @@ static int ventoy_img_partition_callback (struct grub_disk *disk, const grub_par
 
 static grub_err_t ventoy_cmd_img_part_info(grub_extcmd_context_t ctxt, int argc, char **args)
 {
+    int cnt = 0;
     char *device_name = NULL;
     grub_device_t dev = NULL;
     char buf[64];
@@ -3531,11 +3534,14 @@ static grub_err_t ventoy_cmd_img_part_info(grub_extcmd_context_t ctxt, int argc,
         goto end;        
     }
 
-    grub_partition_iterate(dev->disk, ventoy_img_partition_callback, NULL);
+    grub_partition_iterate(dev->disk, ventoy_img_partition_callback, &cnt);
 
     grub_snprintf(buf, sizeof(buf), "newc:vtoy_dm_table:mem:0x%llx:size:%d", (ulonglong)(ulong)g_part_list_buf, g_part_list_pos);
     grub_env_set("vtoy_img_part_file", buf);
 
+    grub_snprintf(buf, sizeof(buf), "%d", cnt);
+    grub_env_set("vtoy_img_part_cnt", buf);
+
 end:
 
     check_free(device_name, grub_free);
@@ -4792,6 +4798,59 @@ out:
     VENTOY_CMD_RETURN(GRUB_ERR_NONE);
 }
 
+static grub_err_t grub_cmd_gptpriority(grub_extcmd_context_t ctxt, int argc, char **args)
+{
+  grub_disk_t disk;
+  grub_partition_t part;
+  char priority_str[3]; /* Maximum value 15 */
+
+  (void)ctxt;
+
+  if (argc < 2 || argc > 3)
+    return grub_error (GRUB_ERR_BAD_ARGUMENT,
+                       "gptpriority DISKNAME PARTITIONNUM [VARNAME]");
+
+  /* Open the disk if it exists */
+  disk = grub_disk_open (args[0]);
+  if (!disk)
+    {
+      return grub_error (GRUB_ERR_BAD_ARGUMENT,
+                         "Not a disk");
+    }
+
+  part = grub_partition_probe (disk, args[1]);
+  if (!part)
+    {
+      grub_disk_close (disk);
+      return grub_error (GRUB_ERR_BAD_ARGUMENT,
+                         "No such partition");
+    }
+
+  if (grub_strcmp (part->partmap->name, "gpt"))
+    {
+      grub_disk_close (disk);
+      return grub_error (GRUB_ERR_BAD_PART_TABLE,
+                         "Not a GPT partition");
+    }
+
+  grub_snprintf (priority_str, sizeof(priority_str), "%u",
+                 (grub_uint32_t)((part->gpt_attrib >> 48) & 0xfULL));
+
+  if (argc == 3)
+    {
+      grub_env_set (args[2], priority_str);
+      grub_env_export (args[2]);
+    }
+  else
+    {
+      grub_printf ("Priority is %s\n", priority_str);
+    }
+
+  grub_disk_close (disk);
+  return GRUB_ERR_NONE;
+}
+
+
 int ventoy_env_init(void)
 {
     char buf[64];
@@ -4839,6 +4898,8 @@ int ventoy_env_init(void)
     return 0;
 }
 
+
+
 static cmd_para ventoy_cmds[] = 
 {
     { "vt_incr",  ventoy_cmd_incr,  0, NULL, "{Var} {INT}",   "Increase integer variable",    NULL },
@@ -4971,6 +5032,7 @@ static cmd_para ventoy_cmds[] =
     { "vt_pop_pager", ventoy_cmd_pop_pager, 0, NULL, "", "", NULL },
     { "vt_check_json_path_case", ventoy_cmd_chk_json_pathcase, 0, NULL, "", "", NULL },
     { "vt_append_extra_sector", ventoy_cmd_append_ext_sector, 0, NULL, "", "", NULL },
+    { "gptpriority", grub_cmd_gptpriority, 0, NULL, "", "", NULL },
 };
 
 int ventoy_register_all_cmd(void)

GRUB2/MOD_SRC/grub-2.04/include/grub/partition.h

@@ -0,0 +1,141 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 1999,2000,2001,2002,2004,2006,2007  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GRUB_PART_HEADER
+#define GRUB_PART_HEADER	1
+
+#include <grub/dl.h>
+#include <grub/list.h>
+
+struct grub_disk;
+
+typedef struct grub_partition *grub_partition_t;
+
+#ifdef GRUB_UTIL
+typedef enum
+{
+  GRUB_EMBED_PCBIOS
+} grub_embed_type_t;
+#endif
+
+typedef int (*grub_partition_iterate_hook_t) (struct grub_disk *disk,
+					      const grub_partition_t partition,
+					      void *data);
+
+/* Partition map type.  */
+struct grub_partition_map
+{
+  /* The next partition map type.  */
+  struct grub_partition_map *next;
+  struct grub_partition_map **prev;
+
+  /* The name of the partition map type.  */
+  const char *name;
+
+  /* Call HOOK with each partition, until HOOK returns non-zero.  */
+  grub_err_t (*iterate) (struct grub_disk *disk,
+			 grub_partition_iterate_hook_t hook, void *hook_data);
+#ifdef GRUB_UTIL
+  /* Determine sectors available for embedding.  */
+  grub_err_t (*embed) (struct grub_disk *disk, unsigned int *nsectors,
+		       unsigned int max_nsectors,
+		       grub_embed_type_t embed_type,
+		       grub_disk_addr_t **sectors);
+#endif
+};
+typedef struct grub_partition_map *grub_partition_map_t;
+
+/* Partition description.  */
+struct grub_partition
+{
+  /* The partition number.  */
+  int number;
+
+  /* The start sector (relative to parent).  */
+  grub_disk_addr_t start;
+
+  /* The length in sector units.  */
+  grub_uint64_t len;
+
+  /* The offset of the partition table.  */
+  grub_disk_addr_t offset;
+
+  /* The index of this partition in the partition table.  */
+  int index;
+
+  /* Parent partition (physically contains this partition).  */
+  struct grub_partition *parent;
+
+  /* The type partition map.  */
+  grub_partition_map_t partmap;
+
+  /* The type of partition whne it's on MSDOS.
+     Used for embedding detection.  */
+  grub_uint8_t msdostype;
+
+  /* The attrib field for GPT. Needed for priority detection. */
+  grub_uint64_t gpt_attrib;
+};
+
+grub_partition_t EXPORT_FUNC(grub_partition_probe) (struct grub_disk *disk,
+						    const char *str);
+int EXPORT_FUNC(grub_partition_iterate) (struct grub_disk *disk,
+					 grub_partition_iterate_hook_t hook,
+					 void *hook_data);
+char *EXPORT_FUNC(grub_partition_get_name) (const grub_partition_t partition);
+
+
+extern grub_partition_map_t EXPORT_VAR(grub_partition_map_list);
+
+#ifndef GRUB_LST_GENERATOR
+static inline void
+grub_partition_map_register (grub_partition_map_t partmap)
+{
+  grub_list_push (GRUB_AS_LIST_P (&grub_partition_map_list),
+		  GRUB_AS_LIST (partmap));
+}
+#endif
+
+static inline void
+grub_partition_map_unregister (grub_partition_map_t partmap)
+{
+  grub_list_remove (GRUB_AS_LIST (partmap));
+}
+
+#define FOR_PARTITION_MAPS(var) FOR_LIST_ELEMENTS((var), (grub_partition_map_list))
+
+
+static inline grub_disk_addr_t
+grub_partition_get_start (const grub_partition_t p)
+{
+  grub_partition_t part;
+  grub_uint64_t part_start = 0;
+
+  for (part = p; part; part = part->parent)
+    part_start += part->start;
+
+  return part_start;
+}
+
+static inline grub_uint64_t
+grub_partition_get_len (const grub_partition_t p)
+{
+  return p->len;
+}
+
+#endif /* ! GRUB_PART_HEADER */