mirror of https://gitee.com/openkylin/linux.git
50 lines
1.0 KiB
C
50 lines
1.0 KiB
C
#include <linux/pagemap.h>
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#include <linux/blkdev.h>
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#include <linux/genhd.h>
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/*
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* add_gd_partition adds a partitions details to the devices partition
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* description.
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*/
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struct parsed_partitions {
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struct block_device *bdev;
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char name[BDEVNAME_SIZE];
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struct {
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sector_t from;
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sector_t size;
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int flags;
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bool has_info;
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struct partition_meta_info info;
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} parts[DISK_MAX_PARTS];
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int next;
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int limit;
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bool access_beyond_eod;
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char *pp_buf;
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};
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static inline void *read_part_sector(struct parsed_partitions *state,
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sector_t n, Sector *p)
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{
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if (n >= get_capacity(state->bdev->bd_disk)) {
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state->access_beyond_eod = true;
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return NULL;
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}
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return read_dev_sector(state->bdev, n, p);
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}
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static inline void
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put_partition(struct parsed_partitions *p, int n, sector_t from, sector_t size)
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{
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if (n < p->limit) {
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char tmp[1 + BDEVNAME_SIZE + 10 + 1];
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p->parts[n].from = from;
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p->parts[n].size = size;
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snprintf(tmp, sizeof(tmp), " %s%d", p->name, n);
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strlcat(p->pp_buf, tmp, PAGE_SIZE);
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}
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}
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extern int warn_no_part;
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