110 lines
3.4 KiB
Diff
110 lines
3.4 KiB
Diff
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--- util-linux-2.11y/mount/linux_fs.h.skipraid2 2002-10-07 09:08:22.000000000 -0400
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+++ util-linux-2.11y/mount/linux_fs.h 2003-01-13 14:42:57.000000000 -0500
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@@ -13,6 +13,12 @@
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#endif
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#endif
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+#include <inttypes.h>
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+#ifndef BLKGETSIZE64
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+#include <sys/ioctl.h>
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+#define BLKGETSIZE64 _IOR(0x12,114,sizeof(uint64_t))
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+#endif
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+
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#define MINIX_SUPER_MAGIC 0x137F /* minix v1, 14 char names */
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#define MINIX_SUPER_MAGIC2 0x138F /* minix v1, 30 char names */
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#define MINIX2_SUPER_MAGIC 0x2468 /* minix v2, 14 char names */
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--- util-linux-2.11y/mount/get_label_uuid.c.skipraid2 2003-01-13 14:44:04.000000000 -0500
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+++ util-linux-2.11y/mount/get_label_uuid.c 2003-01-13 14:46:34.000000000 -0500
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@@ -6,6 +6,8 @@
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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+#include <endian.h>
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+#include <sys/stat.h>
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#include "linux_fs.h"
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#include "get_label_uuid.h"
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@@ -19,28 +21,62 @@
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* not on the disks that form the raid array. This test causes a lot of
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* problems when run on my striped promise fasttrak 100 array."
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*/
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-static inline int
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-is_raid_partition(int fd) {
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-#if 0
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- struct mdp_super_block mdsb;
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- int n;
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-
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- /* hardcode 4096 here in various places, because that's
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- what it's defined to be. Note that even if we used
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- the actual kernel headers, sizeof(mdp_super_t) is
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- slightly larger in the 2.2 kernel on 64-bit archs,
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- so using that wouldn't work. */
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- lseek(fd, -4096, SEEK_END); /* Ignore possible error
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- about return value overflow */
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- n = 4096;
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- if (sizeof(mdsb) < n)
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- n = sizeof(mdsb);
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- if (read(fd, &mdsb, n) != n)
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- return 1; /* error */
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- return (mdsbmagic(mdsb) == MD_SB_MAGIC);
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+
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+#if BYTE_ORDER == BIG_ENDIAN
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+#define INT32_FROM_LE(val) ((unsigned int) ( \
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+ (((unsigned int) (val) & (unsigned int) 0x000000ffU) << 24) | \
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+ (((unsigned int) (val) & (unsigned int) 0x0000ff00U) << 8) | \
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+ (((unsigned int) (val) & (unsigned int) 0x00ff0000U) >> 8) | \
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+ (((unsigned int) (val) & (unsigned int) 0xff000000U) >> 24)))
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#else
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- return 0;
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+#define INT32_FROM_LE(val) (val)
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+#endif
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+
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+typedef struct {
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+ unsigned int md_magic;
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+} mdp_super_t;
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+#ifndef MD_SB_MAGIC
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+#define MD_SB_MAGIC 0xa92b4efc
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+#endif
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+#ifndef MD_RESERVED_BYTES
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+#define MD_RESERVED_BYTES 65536L
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#endif
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+#ifndef MD_NEW_SIZE_BYTES
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+#define MD_NEW_SIZE_BYTES(x) ((x & ~(MD_RESERVED_BYTES - 1L)) - MD_RESERVED_BYTES)
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+#endif
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+
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+static int
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+is_raid_partition(int fd)
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+{
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+ mdp_super_t mdsb;
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+ int n;
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+ struct stat sbuf;
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+ if(fstat(fd, &sbuf))
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+ return 2;
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+ if(!sbuf.st_size) {
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+ uint64_t bsize64;
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+ unsigned int bsize32;
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+ if(!ioctl(fd, BLKGETSIZE64, &bsize64))
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+ sbuf.st_size = bsize64;
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+ else if(!ioctl(fd, BLKGETSIZE, &bsize32))
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+ sbuf.st_size = bsize32;
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+ }
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+ if(!sbuf.st_size) return 3;
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+ /* hardcode 4096 here in various places,
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+ because that's what it's defined to be.
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+ Note that even if we used the actual kernel headers,
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+ sizeof(mdp_super_t) is slightly larger in the 2.2 kernel on 64-bit
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+ archs, so using that wouldn't work. */
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+ lseek(fd, MD_NEW_SIZE_BYTES(sbuf.st_size), SEEK_SET);
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+ n = 4096; if(sizeof(mdsb) < n) n = sizeof(mdsb);
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+ if(read(fd, &mdsb, n) != n)
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+ return 4; /* error */
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+ mdsb.md_magic = INT32_FROM_LE(mdsb.md_magic);
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+ return (mdsb.md_magic == MD_SB_MAGIC); /* If this device has a
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+ RAID superblock at
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+ the end, it must be
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+ part of a RAID
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+ array. */
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}
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/* for now, only ext2, ext3, xfs, ocfs are supported */
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