Date: Sat, 2 Mar 2013 05:03:36 +0000 (UTC) From: Marcel Moolenaar <marcel@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r247611 - head/lib/libstand Message-ID: <201303020503.r2253anY043158@svn.freebsd.org>
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Author: marcel Date: Sat Mar 2 05:03:36 2013 New Revision: 247611 URL: http://svnweb.freebsd.org/changeset/base/247611 Log: Fix nandfs support by providing the same crc32 function as is used in newfs_nandfs. In libstand we get crc32 from libz. The polynomial is not the same as used for nandfs, which is the crc32 used in the kernel. Modified: head/lib/libstand/nandfs.c Modified: head/lib/libstand/nandfs.c ============================================================================== --- head/lib/libstand/nandfs.c Sat Mar 2 05:02:29 2013 (r247610) +++ head/lib/libstand/nandfs.c Sat Mar 2 05:03:36 2013 (r247611) @@ -125,6 +125,27 @@ struct fs_ops nandfs_fsops = { #define NINDIR(fs) ((fs)->nf_blocksize / sizeof(nandfs_daddr_t)) +/* from NetBSD's src/sys/net/if_ethersubr.c */ +static uint32_t +nandfs_crc32(uint32_t crc, const uint8_t *buf, size_t len) +{ + static const uint32_t crctab[] = { + 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, + 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, + 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, + 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c + }; + size_t i; + + crc = crc ^ ~0U; + for (i = 0; i < len; i++) { + crc ^= buf[i]; + crc = (crc >> 4) ^ crctab[crc & 0xf]; + crc = (crc >> 4) ^ crctab[crc & 0xf]; + } + return (crc ^ ~0U); +} + static int nandfs_check_fsdata_crc(struct nandfs_fsdata *fsdata) { @@ -138,7 +159,7 @@ nandfs_check_fsdata_crc(struct nandfs_fs /* Calculate */ fsdata->f_sum = (0); - comp_crc = crc32(0, (uint8_t *)fsdata, fsdata->f_bytes); + comp_crc = nandfs_crc32(0, (uint8_t *)fsdata, fsdata->f_bytes); /* Restore */ fsdata->f_sum = fsdata_crc; @@ -162,7 +183,7 @@ nandfs_check_superblock_crc(struct nandf /* Calculate */ super->s_sum = (0); - comp_crc = crc32(0, (uint8_t *)super, fsdata->f_sbbytes); + comp_crc = nandfs_crc32(0, (uint8_t *)super, fsdata->f_sbbytes); /* Restore */ super->s_sum = super_crc;
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