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Ian Campbell
a4f86af3e4
The former is a userspace sanitised header which contains the definitions we need. In some distros linux/fs.h defines WRITE which conflicts with blktaps own use of that name. Also there is no reason to use <linux/errno.h> over the more normal <errno.h>. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
44 lines
832 B
C
44 lines
832 B
C
#include <inttypes.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <sys/mount.h>
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#include "tapdisk.h"
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#include "blk.h"
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int blk_getimagesize(int fd, uint64_t *size)
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{
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int rc;
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*size = 0;
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rc = ioctl(fd, BLKGETSIZE, size);
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if (rc) {
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DPRINTF("ERR: BLKGETSIZE failed, couldn't stat image");
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return -EINVAL;
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}
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return 0;
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}
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int blk_getsectorsize(int fd, uint64_t *sector_size)
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{
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#if defined(BLKSSZGET)
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int rc;
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*sector_size = DEFAULT_SECTOR_SIZE;
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rc = ioctl(fd, BLKSSZGET, sector_size);
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if (rc) {
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DPRINTF("ERR: BLKSSZGET failed. Falling back to use default sector size");
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*sector_size = DEFAULT_SECTOR_SIZE;
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}
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if (*sector_size != DEFAULT_SECTOR_SIZE)
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DPRINTF("Note: sector size is %"PRIu64" (not %u)\n",
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*sector_size, DEFAULT_SECTOR_SIZE);
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#else
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*sector_size = DEFAULT_SECTOR_SIZE;
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#endif
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return 0;
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}
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