search for: lba_alt

Previous version had some issues in case of error situations, among those: - backup gpt header was not read if reading of primary failed - alternating nature of lba_cur and lba_alt was ignored This patch fixes this and extends the gpt handling. The current behavior is: - try primary header; if unreadable or checksum fails (or sanity checks fail unless relax flag is set) - try secondary header - try main partition table referenced in the header that was read; if it'...

This small set fixes few bugs, improves gpt handling (under buggy conditions) and implements strict flag with more fine grained control which should fix issues with sanity checks against disk sizes. If this set is allright I'd want to do what I mentioned in older discussion with Ady - backport missing patches from 6.x to 5.x and 4.x so all versions have up to date chain version. Michal

...tatic inline int valid_crc(uint32_t crc, const uint8_t *buf, unsigned int siz) -{ - return crc == crc32(crc32(0, NULL, 0), buf, siz); -} - -static int gpt_check_hdr_crc(const struct disk_info * const diskinfo, struct disk_gpt_header **_gh) -{ - struct disk_gpt_header *gh = *_gh; - uint64_t lba_alt; - uint32_t hold_crc32; - - hold_crc32 = gh->chksum; - gh->chksum = 0; - if (!valid_crc(hold_crc32, (const uint8_t *)gh, gh->hdr_size)) { - warn("Primary GPT header checksum invalid."); - /* retry with backup */ - lba_alt = gh->lba_alt; - free(gh); - if (!(gh = *_g...

...et to GPT partition list in sectors */ - uint64_t gpt_lsiz; /* size of GPT partition list in bytes */ - uint64_t gpt_lcnt; /* size of GPT partition in sectors */ - uint64_t gpt_sec; /* secondary gpt header */ - - if (!(flags & PIF_STRICT)) - return 0; - - if (gpth->lba_alt < gpth->lba_cur) - gpt_sec = gpth->lba_cur; - else - gpt_sec = gpth->lba_alt; - gpt_loff = gpth->lba_table; - gpt_lsiz = (uint64_t)gpth->part_size * gpth->part_count; - gpt_lcnt = (gpt_lsiz + di->bps - 1) / di->bps; - - /* - * disk_read_sectors allows r...

This is a bit updated set of chain.c32 changes that simplifies a few things (and in partiter part), fixes few minor issues and adds a few new features. Details are in the following commits, below is the summary and pull details at the end. Shao - any chance to peek over them ? Most of those are relatively simple changes and well tested, though of course something might have slipped my attention.

1) code split and move Iterator related functionality is yanked from chain.c and moved to iterator.{c,h}. Both are moved to com32/chain and this way chain.c is ready for further splitting. Alternatively, partiter could be moved to com32/lib at any time in the future. It's potentially useful for other modules (e.g. if someone wanted to code partition dumper or editor). 2) Iterator updates

So last week I was wondering if XFS was still working -- even with its last on-disk structure changes -- and it _suprisingly_ worked as expected. Right, now I can finally get rid of GRUB and use Syslinux to boot my Linux on EFI from a rootfs with xfs. Shit, I have two partitions (the first one being the required ESP) so there is no way to access the other partitions since because Syslinux does not

Hello, the following patches should get multidisk access working. The syntax accepted is the following: (hdx,y)/path/to/file where x is the disk number and start at 0 and the y is the partition number starting at 1. So (hd0,1) is the first partition of the first disk. the other accepted syntax is using MBR's 32 bits disk signature so for example: (mbr:0x12345678,2)/foo/bar would address

...x%.8x\n" - "GPT partition size ___ : 0x%.8x\n" - "GPT part. table chksum : 0x%.8x\n", - gpt->sig, - gpt->rev.fields.major, - gpt->rev.fields.minor, - gpt->hdr_size, - gpt->chksum, - gpt->reserved1, - gpt->lba_cur, - gpt->lba_alt, - gpt->lba_first_usable, - gpt->lba_last_usable, - gpt->lba_table, gpt->part_count, gpt->part_size, gpt->table_chksum); - guid_to_str(guid_text, &gpt->disk_guid); - printf("GPT disk GUID ________ : {%s}\n", guid_text); -} diff --git a/com32/lib/sys...