kboot: Disks should be at least 16MB
Linux pre-boot environments will often have a number of psuedo disks that are small, all smaller than a few MB. 16MB is a good cutoff since it's big enough to filter these devices, yet small enough to allow a super-minimal partition through (the smallest I've been able to make that's useful lately is around 20MB). Sponsored by: Netflix
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@ -60,6 +60,8 @@ struct devsw hostdisk = {
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*/
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#define SYSBLK "/sys/block"
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#define HOSTDISK_MIN_SIZE (16ul << 20) /* 16MB */
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typedef STAILQ_HEAD(, hdinfo) hdinfo_list_t;
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typedef struct hdinfo {
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STAILQ_ENTRY(hdinfo) hd_link; /* link in device list */
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@ -162,6 +164,8 @@ hostdisk_add_drive(const char *drv, uint64_t secs)
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if (!file2u64(fn, &hd->hd_sectorsize))
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goto err;
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hd->hd_size = hd->hd_sectors * hd->hd_sectorsize;
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if (hd->hd_size < HOSTDISK_MIN_SIZE)
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goto err;
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hd->hd_flags = 0;
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STAILQ_INIT(&hd->hd_children);
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printf("/dev/%s: %ju %ju %ju\n",
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