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- From 02cff0ccaa6d364f5c1eeea83f47ac80ccc967d4 Mon Sep 17 00:00:00 2001
- From: Gabor Juhos <juhosg@openwrt.org>
- Date: Tue, 3 Sep 2013 18:11:50 +0200
- Subject: [PATCH] mtd: add support for different partition parser types
- Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
- ---
- drivers/mtd/mtdpart.c | 56 ++++++++++++++++++++++++++++++++++++++++
- include/linux/mtd/partitions.h | 11 ++++++++
- 2 files changed, 67 insertions(+)
- --- a/drivers/mtd/mtdpart.c
- +++ b/drivers/mtd/mtdpart.c
- @@ -740,6 +740,30 @@ static struct mtd_part_parser *get_parti
-
- #define put_partition_parser(p) do { module_put((p)->owner); } while (0)
-
- +static struct mtd_part_parser *
- +get_partition_parser_by_type(enum mtd_parser_type type,
- + struct mtd_part_parser *start)
- +{
- + struct mtd_part_parser *p, *ret = NULL;
- +
- + spin_lock(&part_parser_lock);
- +
- + p = list_prepare_entry(start, &part_parsers, list);
- + if (start)
- + put_partition_parser(start);
- +
- + list_for_each_entry_continue(p, &part_parsers, list) {
- + if (p->type == type && try_module_get(p->owner)) {
- + ret = p;
- + break;
- + }
- + }
- +
- + spin_unlock(&part_parser_lock);
- +
- + return ret;
- +}
- +
- void register_mtd_parser(struct mtd_part_parser *p)
- {
- spin_lock(&part_parser_lock);
- @@ -868,6 +892,38 @@ int parse_mtd_partitions(struct mtd_info
- return err;
- }
-
- +int parse_mtd_partitions_by_type(struct mtd_info *master,
- + enum mtd_parser_type type,
- + struct mtd_partition **pparts,
- + struct mtd_part_parser_data *data)
- +{
- + struct mtd_part_parser *prev = NULL;
- + int ret = 0;
- +
- + while (1) {
- + struct mtd_part_parser *parser;
- +
- + parser = get_partition_parser_by_type(type, prev);
- + if (!parser)
- + break;
- +
- + ret = (*parser->parse_fn)(master, pparts, data);
- +
- + if (ret > 0) {
- + put_partition_parser(parser);
- + printk(KERN_NOTICE
- + "%d %s partitions found on MTD device %s\n",
- + ret, parser->name, master->name);
- + break;
- + }
- +
- + prev = parser;
- + }
- +
- + return ret;
- +}
- +EXPORT_SYMBOL_GPL(parse_mtd_partitions_by_type);
- +
- int mtd_is_partition(const struct mtd_info *mtd)
- {
- struct mtd_part *part;
- --- a/include/linux/mtd/partitions.h
- +++ b/include/linux/mtd/partitions.h
- @@ -68,12 +68,17 @@ struct mtd_part_parser_data {
- * Functions dealing with the various ways of partitioning the space
- */
-
- +enum mtd_parser_type {
- + MTD_PARSER_TYPE_DEVICE = 0,
- +};
- +
- struct mtd_part_parser {
- struct list_head list;
- struct module *owner;
- const char *name;
- int (*parse_fn)(struct mtd_info *, struct mtd_partition **,
- struct mtd_part_parser_data *);
- + enum mtd_parser_type type;
- };
-
- extern void register_mtd_parser(struct mtd_part_parser *parser);
- @@ -87,4 +92,9 @@ uint64_t mtd_get_device_size(const struc
- extern void __weak arch_split_mtd_part(struct mtd_info *master,
- const char *name, int offset, int size);
-
- +int parse_mtd_partitions_by_type(struct mtd_info *master,
- + enum mtd_parser_type type,
- + struct mtd_partition **pparts,
- + struct mtd_part_parser_data *data);
- +
- #endif
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