111 lines
2.7 KiB
Diff
111 lines
2.7 KiB
Diff
From: Gabor Juhos <juhosg@openwrt.org>
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Subject: mtd: add support for different partition parser types
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Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
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---
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drivers/mtd/mtdpart.c | 56 ++++++++++++++++++++++++++++++++++++++++
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include/linux/mtd/partitions.h | 11 ++++++++
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2 files changed, 67 insertions(+)
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--- a/drivers/mtd/mtdpart.c
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+++ b/drivers/mtd/mtdpart.c
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@@ -1138,6 +1138,62 @@ void mtd_part_parser_cleanup(struct mtd_
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}
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}
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+static struct mtd_part_parser *
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+get_partition_parser_by_type(enum mtd_parser_type type,
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+ struct mtd_part_parser *start)
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+{
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+ struct mtd_part_parser *p, *ret = NULL;
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+
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+ spin_lock(&part_parser_lock);
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+
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+ p = list_prepare_entry(start, &part_parsers, list);
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+ if (start)
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+ mtd_part_parser_put(start);
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+
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+ list_for_each_entry_continue(p, &part_parsers, list) {
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+ if (p->type == type && try_module_get(p->owner)) {
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+ ret = p;
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+ break;
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+ }
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+ }
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+
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+ spin_unlock(&part_parser_lock);
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+
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+ return ret;
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+}
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+
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+int parse_mtd_partitions_by_type(struct mtd_info *master,
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+ enum mtd_parser_type type,
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+ const struct mtd_partition **pparts,
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+ struct mtd_part_parser_data *data)
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+{
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+ struct mtd_part_parser *prev = NULL;
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+ int ret = 0;
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+
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+ while (1) {
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+ struct mtd_part_parser *parser;
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+
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+ parser = get_partition_parser_by_type(type, prev);
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+ if (!parser)
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+ break;
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+
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+ ret = (*parser->parse_fn)(master, pparts, data);
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+
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+ if (ret > 0) {
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+ mtd_part_parser_put(parser);
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+ printk(KERN_NOTICE
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+ "%d %s partitions found on MTD device %s\n",
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+ ret, parser->name, master->name);
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+ break;
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+ }
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+
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+ prev = parser;
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+ }
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+
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+ return ret;
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+}
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+EXPORT_SYMBOL_GPL(parse_mtd_partitions_by_type);
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+
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int mtd_is_partition(const struct mtd_info *mtd)
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{
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struct mtd_part *part;
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--- a/include/linux/mtd/partitions.h
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+++ b/include/linux/mtd/partitions.h
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@@ -68,11 +68,14 @@ struct mtd_part_parser_data {
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unsigned long origin;
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};
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-
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/*
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* Functions dealing with the various ways of partitioning the space
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*/
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+enum mtd_parser_type {
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+ MTD_PARSER_TYPE_DEVICE = 0,
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+};
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+
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struct mtd_part_parser {
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struct list_head list;
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struct module *owner;
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@@ -81,6 +84,7 @@ struct mtd_part_parser {
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int (*parse_fn)(struct mtd_info *, const struct mtd_partition **,
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struct mtd_part_parser_data *);
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void (*cleanup)(const struct mtd_partition *pparts, int nr_parts);
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+ enum mtd_parser_type type;
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};
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/* Container for passing around a set of parsed partitions */
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@@ -113,4 +117,9 @@ uint64_t mtd_get_device_size(const struc
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extern void __weak arch_split_mtd_part(struct mtd_info *master,
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const char *name, int offset, int size);
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+int parse_mtd_partitions_by_type(struct mtd_info *master,
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+ enum mtd_parser_type type,
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+ const struct mtd_partition **pparts,
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+ struct mtd_part_parser_data *data);
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+
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#endif
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