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| author | Dmitry Osipenko <digetx@gmail.com> | 2021-08-20 03:45:34 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-08-24 10:09:06 -0600 |
| commit | 466d9c4904deb25e2e8dcd29d3a998f4e3fa7c17 (patch) | |
| tree | 5037a2454bcee99d0562783046850dc53c5340a8 | |
| parent | 0bdfbca8a623e262e0f343b143151000a300cbaf (diff) | |
| download | lwn-466d9c4904deb25e2e8dcd29d3a998f4e3fa7c17.tar.gz lwn-466d9c4904deb25e2e8dcd29d3a998f4e3fa7c17.zip | |
partitions/efi: Support non-standard GPT location
Support looking up GPT at a non-standard location specified by a block
device driver.
Acked-by: Davidlohr Bueso <dbueso@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20210820004536.15791-3-digetx@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | block/partitions/efi.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/block/partitions/efi.c b/block/partitions/efi.c index aaa3dc487cb5..7ca5c4c374d4 100644 --- a/block/partitions/efi.c +++ b/block/partitions/efi.c @@ -585,6 +585,8 @@ static int find_valid_gpt(struct parsed_partitions *state, gpt_header **gpt, gpt_header *pgpt = NULL, *agpt = NULL; gpt_entry *pptes = NULL, *aptes = NULL; legacy_mbr *legacymbr; + struct gendisk *disk = state->disk; + const struct block_device_operations *fops = disk->fops; sector_t total_sectors = get_capacity(state->disk); u64 lastlba; @@ -619,6 +621,16 @@ static int find_valid_gpt(struct parsed_partitions *state, gpt_header **gpt, if (!good_agpt && force_gpt) good_agpt = is_gpt_valid(state, lastlba, &agpt, &aptes); + if (!good_agpt && force_gpt && fops->alternative_gpt_sector) { + sector_t agpt_sector; + int err; + + err = fops->alternative_gpt_sector(disk, &agpt_sector); + if (!err) + good_agpt = is_gpt_valid(state, agpt_sector, + &agpt, &aptes); + } + /* The obviously unsuccessful case */ if (!good_pgpt && !good_agpt) goto fail; |