#include "mdadm.h"
-#define min(a,b) (((a) < (b)) ? (a) : (b))
-
inline void sb_le_to_cpu(bitmap_super_t *sb)
{
sb->magic = __le32_to_cpu(sb->magic);
return (array_size * 512 + chunksize - 1) / chunksize;
}
+unsigned long bitmap_sectors(struct bitmap_super_s *bsb)
+{
+ unsigned long long bits = bitmap_bits(__le64_to_cpu(bsb->sync_size),
+ __le32_to_cpu(bsb->chunksize));
+ int bits_per_sector = 8*512;
+ return (bits + bits_per_sector - 1) / bits_per_sector;
+}
+
+
bitmap_info_t *bitmap_fd_read(int fd, int brief)
{
/* Note: fd might be open O_DIRECT, so we must be
*/
unsigned long long total_bits = 0, read_bits = 0, dirty_bits = 0;
bitmap_info_t *info;
- char *buf, *unaligned;
- int n, skip;
+ void *buf;
+ unsigned int n, skip;
- unaligned = malloc(8192*2);
- buf = (char*) ((unsigned long)unaligned | 8191)+1;
+ if (posix_memalign(&buf, 512, 8192) != 0) {
+ fprintf(stderr, Name ": failed to allocate 8192 bytes\n");
+ return NULL;
+ }
n = read(fd, buf, 8192);
info = malloc(sizeof(*info));
fprintf(stderr, Name ": failed to read superblock of bitmap "
"file: %s\n", strerror(errno));
free(info);
- free(unaligned);
return NULL;
}
memcpy(&info->sb, buf, sizeof(info->sb));
sb_le_to_cpu(&info->sb); /* convert superblock to CPU byte ordering */
- if (brief || info->sb.sync_size == 0)
+ if (brief || info->sb.sync_size == 0 || info->sb.chunksize == 0)
goto out;
/* read the rest of the file counting total bits and dirty bits --
if (!st) {
/* just look at device... */
lseek(fd, 0, 0);
- } else {
+ } else if (!st->ss->locate_bitmap) {
+ fprintf(stderr, Name ": No bitmap possible with %s metadata\n",
+ st->ss->name);
+ return NULL;
+ } else
st->ss->locate_bitmap(st, fd);
- }
+
ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */
*stp = st;
} else {
int rv = 1;
char buf[64];
int swap;
+ __u32 uuid32[4];
info = bitmap_file_read(filename, brief, &st);
if (!info)
#else
swap = 1;
#endif
- if (swap) {
- printf(" UUID : %08x:%08x:%08x:%08x\n",
- swapl(*(__u32 *)(sb->uuid+0)),
- swapl(*(__u32 *)(sb->uuid+4)),
- swapl(*(__u32 *)(sb->uuid+8)),
- swapl(*(__u32 *)(sb->uuid+12)));
- } else {
- printf(" UUID : %08x:%08x:%08x:%08x\n",
- *(__u32 *)(sb->uuid+0),
- *(__u32 *)(sb->uuid+4),
- *(__u32 *)(sb->uuid+8),
- *(__u32 *)(sb->uuid+12));
- }
+ memcpy(uuid32, sb->uuid, 16);
+ if (swap)
+ printf(" UUID : %08x:%08x:%08x:%08x\n",
+ swapl(uuid32[0]),
+ swapl(uuid32[1]),
+ swapl(uuid32[2]),
+ swapl(uuid32[3]));
+ else
+ printf(" UUID : %08x:%08x:%08x:%08x\n",
+ uuid32[0],
+ uuid32[1],
+ uuid32[2],
+ uuid32[3]);
+
printf(" Events : %llu\n", (unsigned long long)sb->events);
printf(" Events Cleared : %llu\n", (unsigned long long)sb->events_cleared);
printf(" State : %s\n", bitmap_state(sb->state));
*/
chunksize = DEFAULT_BITMAP_CHUNK;
/* <<20 for 2^20 chunks, >>9 to convert bytes to sectors */
- while (array_size > (chunksize << (20-9)))
+ while (array_size > ((unsigned long long)chunksize << (20-9)))
chunksize <<= 1;
}