disk: introduce partition name
so we can register partion with name as present in EFI GPT Cc: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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263bb23ed2
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86b3577a72
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@ -44,15 +44,43 @@ static LIST_HEAD(partition_parser_list);
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static int register_one_partition(struct block_device *blk,
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struct partition *part, int no)
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{
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char partition_name[19];
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char *partition_name;
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int ret;
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uint64_t start = part->first_sec * SECTOR_SIZE;
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uint64_t size = part->size * SECTOR_SIZE;
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sprintf(partition_name, "%s.%d", blk->cdev.name, no);
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partition_name = asprintf("%s.%d", blk->cdev.name, no);
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if (!partition_name)
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return -ENOMEM;
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dev_dbg(blk->dev, "Registering partition %s on drive %s\n",
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partition_name, blk->cdev.name);
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return devfs_add_partition(blk->cdev.name,
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part->first_sec * SECTOR_SIZE,
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part->size * SECTOR_SIZE,
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0, partition_name);
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ret = devfs_add_partition(blk->cdev.name,
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start, size, 0, partition_name);
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if (ret)
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goto out;
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free(partition_name);
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if (!part->name[0])
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return 0;
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partition_name = asprintf("%s.%s", blk->cdev.name, part->name);
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if (!partition_name)
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return -ENOMEM;
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dev_dbg(blk->dev, "Registering partition %s on drive %s\n",
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partition_name, blk->cdev.name);
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ret = devfs_add_partition(blk->cdev.name,
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start, size, 0, partition_name);
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if (ret)
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dev_warn(blk->dev, "Registering partition %s on drive %s failed\n",
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partition_name, blk->cdev.name);
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ret = 0;
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out:
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free(partition_name);
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return 0;
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}
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static struct partition_parser *partition_parser_get_by_filetype(uint8_t *buf)
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@ -91,12 +119,13 @@ static struct partition_parser *partition_parser_get_by_filetype(uint8_t *buf)
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*/
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int parse_partition_table(struct block_device *blk)
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{
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struct partition_desc pdesc = { .used_entries = 0, };
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struct partition_desc *pdesc;
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int i;
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int rc = 0;
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struct partition_parser *parser;
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uint8_t *buf;
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pdesc = xzalloc(sizeof(*pdesc));
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buf = dma_alloc(SECTOR_SIZE * 2);
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rc = blk->ops->read(blk, buf, 0, 2);
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@ -109,14 +138,14 @@ int parse_partition_table(struct block_device *blk)
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if (!parser)
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goto on_error;
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parser->parse(buf, blk, &pdesc);
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parser->parse(buf, blk, pdesc);
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if (!pdesc.used_entries)
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return 0;
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if (!pdesc->used_entries)
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goto on_error;
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/* at least one partition description found */
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for (i = 0; i < pdesc.used_entries; i++) {
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rc = register_one_partition(blk, &pdesc.parts[i], i);
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for (i = 0; i < pdesc->used_entries; i++) {
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rc = register_one_partition(blk, &pdesc->parts[i], i);
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if (rc != 0)
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dev_err(blk->dev,
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"Failed to register partition %d on %s (%d)\n",
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@ -127,6 +156,7 @@ int parse_partition_table(struct block_device *blk)
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on_error:
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dma_free(buf);
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free(pdesc);
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return rc;
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}
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@ -76,7 +76,7 @@ static void dos_partition(void *buf, struct block_device *blk,
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}
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}
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struct partition_parser dos = {
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static struct partition_parser dos = {
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.parse = dos_partition,
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.type = filetype_mbr,
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};
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@ -12,8 +12,10 @@
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#include <linux/list.h>
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#define MAX_PARTITION 8
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#define MAX_PARTITION_NAME 38
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struct partition {
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char name[MAX_PARTITION_NAME];
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uint64_t first_sec;
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uint64_t size;
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};
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