From: Christoph Hellwig <hch@infradead.org>
To: Qu Wenruo <wqu@suse.com>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: [PATCH 01/13] btrfs: introduce a pure data checksum checking helper
Date: Tue, 3 May 2022 08:03:16 -0700 [thread overview]
Message-ID: <YnFENPsSt4owgvx2@infradead.org> (raw)
In-Reply-To: <c46edf2e09f5924d00174bed98ad1d8a78c80d81.1651559986.git.wqu@suse.com>
> +/*
> + * Verify the checksum for a single sector without any extra action that
> + * depend on the type of I/O.
> + */
> +int btrfs_check_data_sector(struct btrfs_fs_info *fs_info, struct page *page,
> + u32 pgoff, u8 *csum_expected)
> +{
> + SHASH_DESC_ON_STACK(shash, fs_info->csum_shash);
> + char *kaddr;
> + const u32 len = fs_info->sectorsize;
> + const u32 csum_size = fs_info->csum_size;
> + u8 csum[BTRFS_CSUM_SIZE];
> +
> + ASSERT(pgoff + len <= PAGE_SIZE);
> +
> + kaddr = kmap_local_page(page) + pgoff;
> + shash->tfm = fs_info->csum_shash;
> +
> + crypto_shash_digest(shash, kaddr, len, csum);
> + kunmap_local(kaddr);
Nit: the ->tfm assignment can move out of the kmap section. Otherwise
this looks good:
Reviewed-by: Christoph Hellwig <hch@lst.de>
next prev parent reply other threads:[~2022-05-03 15:03 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-03 6:49 [PATCH 00/13] btrfs: make read repair work in synchronous mode Qu Wenruo
2022-05-03 6:49 ` [PATCH 01/13] btrfs: introduce a pure data checksum checking helper Qu Wenruo
2022-05-03 15:03 ` Christoph Hellwig [this message]
2022-05-03 6:49 ` [PATCH 02/13] btrfs: quit early if the fs has no RAID56 support for raid56 related checks Qu Wenruo
2022-05-03 6:49 ` [PATCH 03/13] btrfs: save the original bi_iter into btrfs_bio for buffered read Qu Wenruo
2022-05-03 6:49 ` [PATCH 04/13] btrfs: remove duplicated parameters from submit_data_read_repair() Qu Wenruo
2022-05-03 6:49 ` [PATCH 05/13] btrfs: add btrfs_read_repair_ctrl to record corrupted sectors Qu Wenruo
2022-05-03 15:06 ` Christoph Hellwig
2022-05-04 1:12 ` Qu Wenruo
2022-05-04 14:05 ` Christoph Hellwig
2022-05-04 22:40 ` Qu Wenruo
2022-05-12 17:16 ` David Sterba
2022-05-13 10:33 ` Christoph Hellwig
2022-05-13 10:53 ` Qu Wenruo
2022-05-13 10:57 ` Christoph Hellwig
2022-05-13 11:21 ` Qu Wenruo
2022-05-13 11:23 ` Christoph Hellwig
2022-05-17 13:32 ` Qu Wenruo
2022-05-03 6:49 ` [PATCH 06/13] btrfs: add a helper to queue a corrupted sector for read repair Qu Wenruo
2022-05-03 15:07 ` Christoph Hellwig
2022-05-04 1:13 ` Qu Wenruo
2022-05-04 14:06 ` Christoph Hellwig
2022-05-12 17:20 ` David Sterba
2022-05-03 6:49 ` [PATCH 07/13] btrfs: introduce a helper to repair from one mirror Qu Wenruo
2022-05-03 6:49 ` [PATCH 08/13] btrfs: allow btrfs read repair to submit writes in asynchronous mode Qu Wenruo
2022-05-03 6:49 ` [PATCH 09/13] btrfs: handle RAID56 read repair differently Qu Wenruo
2022-05-03 6:49 ` [PATCH 10/13] btrfs: switch buffered read to the new read repair routine Qu Wenruo
2022-05-03 6:49 ` [PATCH 11/13] btrfs: switch direct IO routine to use btrfs_read_repair_ctrl Qu Wenruo
2022-05-03 6:49 ` [PATCH 12/13] btrfs: remove io_failure_record infrastructure completely Qu Wenruo
2022-05-03 6:49 ` [PATCH 13/13] btrfs: remove btrfs_inode::io_failure_tree Qu Wenruo
2022-05-03 15:07 ` Christoph Hellwig
2022-05-12 17:08 ` [PATCH 00/13] btrfs: make read repair work in synchronous mode David Sterba
2022-05-12 23:01 ` Qu Wenruo
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