From e60683a0d553b6488c564863f4e48954944fb0f8 Mon Sep 17 00:00:00 2001 From: bigbiff bigbiff Date: Fri, 22 Feb 2013 20:55:50 -0500 Subject: use libblkid to get filesystem type we can now use libblkid to detect exfat --- libblkid/jfs.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 libblkid/jfs.c (limited to 'libblkid/jfs.c') diff --git a/libblkid/jfs.c b/libblkid/jfs.c new file mode 100644 index 000000000..78c018c15 --- /dev/null +++ b/libblkid/jfs.c @@ -0,0 +1,71 @@ +/* + * Copyright (C) 1999 by Andries Brouwer + * Copyright (C) 1999, 2000, 2003 by Theodore Ts'o + * Copyright (C) 2001 by Andreas Dilger + * Copyright (C) 2004 Kay Sievers + * Copyright (C) 2008 Karel Zak + * + * This file may be redistributed under the terms of the + * GNU Lesser General Public License. + */ +#include +#include +#include +#include +#include +#include +#include + +#include "superblocks.h" + +struct jfs_super_block { + unsigned char js_magic[4]; + uint32_t js_version; + uint64_t js_size; + uint32_t js_bsize; /* 4: aggregate block size in bytes */ + uint16_t js_l2bsize; /* 2: log2 of s_bsize */ + uint16_t js_l2bfactor; /* 2: log2(s_bsize/hardware block size) */ + uint32_t js_pbsize; /* 4: hardware/LVM block size in bytes */ + uint16_t js_l2pbsize; /* 2: log2 of s_pbsize */ + uint16_t js_pad; /* 2: padding necessary for alignment */ + uint32_t js_dummy2[26]; + unsigned char js_uuid[16]; + unsigned char js_label[16]; + unsigned char js_loguuid[16]; +}; + +static int probe_jfs(blkid_probe pr, const struct blkid_idmag *mag) +{ + struct jfs_super_block *js; + + js = blkid_probe_get_sb(pr, mag, struct jfs_super_block); + if (!js) + return -1; + if (le32_to_cpu(js->js_bsize) != (1U << le16_to_cpu(js->js_l2bsize))) + return 1; + if (le32_to_cpu(js->js_pbsize) != (1U << le16_to_cpu(js->js_l2pbsize))) + return 1; + if ((le16_to_cpu(js->js_l2bsize) - le16_to_cpu(js->js_l2pbsize)) != + le16_to_cpu(js->js_l2bfactor)) + return 1; + + if (strlen((char *) js->js_label)) + blkid_probe_set_label(pr, js->js_label, sizeof(js->js_label)); + blkid_probe_set_uuid(pr, js->js_uuid); + return 0; +} + + +const struct blkid_idinfo jfs_idinfo = +{ + .name = "jfs", + .usage = BLKID_USAGE_FILESYSTEM, + .probefunc = probe_jfs, + .minsz = 16 * 1024 * 1024, + .magics = + { + { .magic = "JFS1", .len = 4, .kboff = 32 }, + { NULL } + } +}; + -- cgit v1.2.3