X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lib%2Fext2fs%2Fgetsectsize.c;h=d6bc3767dbfc7cc4da7667e61d4e8a290422470f;hb=9db53e3fec3413572a2240bd374e76353fab9cbe;hp=e749d39696ca0fe2112d7759c05bc6b590f3411c;hpb=e37fbf1c19ca255cb5349b159ff7d5288e8cf9a3;p=tools%2Fe2fsprogs.git

diff --git a/lib/ext2fs/getsectsize.c b/lib/ext2fs/getsectsize.c
index e749d39..d6bc376 100644
--- a/lib/ext2fs/getsectsize.c
+++ b/lib/ext2fs/getsectsize.c
@@ -1,18 +1,23 @@
 /*
  * getsectsize.c --- get the sector size of a device.
- * 
+ *
  * Copyright (C) 1995, 1995 Theodore Ts'o.
  * Copyright (C) 2003 VMware, Inc.
  *
  * %Begin-Header%
- * This file may be redistributed under the terms of the GNU Public
- * License.
+ * This file may be redistributed under the terms of the GNU Library
+ * General Public License, version 2.
  * %End-Header%
  */
 
+#ifndef _LARGEFILE_SOURCE
 #define _LARGEFILE_SOURCE
+#endif
+#ifndef _LARGEFILE64_SOURCE
 #define _LARGEFILE64_SOURCE
+#endif
 
+#include "config.h"
 #include <stdio.h>
 #if HAVE_UNISTD_H
 #include <unistd.h>
@@ -21,30 +26,34 @@
 #include <errno.h>
 #endif
 #include <fcntl.h>
+#ifdef HAVE_SYS_DISK_H
+#include <sys/disk.h>
+#endif
 #ifdef HAVE_LINUX_FD_H
 #include <sys/ioctl.h>
 #include <linux/fd.h>
 #endif
 
-#if defined(__linux__) && defined(_IO) && !defined(BLKSSZGET)
+#if defined(__linux__) && defined(_IO)
+#if !defined(BLKSSZGET)
 #define BLKSSZGET  _IO(0x12,104)/* get block device sector size */
 #endif
+#if !defined(BLKPBSZGET)
+#define BLKPBSZGET _IO(0x12,123)/* get block physical sector size */
+#endif
+#endif
 
 #include "ext2_fs.h"
 #include "ext2fs.h"
 
 /*
- * Returns the number of blocks in a partition
+ * Returns the logical sector size of a device
  */
 errcode_t ext2fs_get_device_sectsize(const char *file, int *sectsize)
 {
 	int	fd;
 
-#ifdef HAVE_OPEN64
-	fd = open64(file, O_RDONLY);
-#else
-	fd = open(file, O_RDONLY);
-#endif
+	fd = ext2fs_open_file(file, O_RDONLY, 0);
 	if (fd < 0)
 		return errno;
 
@@ -54,6 +63,73 @@ errcode_t ext2fs_get_device_sectsize(const char *file, int *sectsize)
 		return 0;
 	}
 #endif
+#ifdef DIOCGSECTORSIZE
+	if (ioctl(fd, DIOCGSECTORSIZE, sectsize) >= 0) {
+		close(fd);
+		return 0;
+	}
+#endif
+	*sectsize = 0;
+	close(fd);
+	return 0;
+}
+
+/*
+ * Return desired alignment for direct I/O
+ */
+int ext2fs_get_dio_alignment(int fd)
+{
+	int align = 0;
+
+#ifdef BLKSSZGET
+	if (ioctl(fd, BLKSSZGET, &align) < 0)
+		align = 0;
+#endif
+#ifdef DIOCGSECTORSIZE
+	if (align <= 0 &&
+	    ioctl(fd, DIOCGSECTORSIZE, &align) < 0)
+		align = 0;
+#endif
+
+#ifdef _SC_PAGESIZE
+	if (align <= 0)
+		align = sysconf(_SC_PAGESIZE);
+#endif
+#ifdef HAVE_GETPAGESIZE
+	if (align <= 0)
+		align = getpagesize();
+#endif
+	if (align <= 0)
+		align = 4096;
+
+	return align;
+}
+
+/*
+ * Returns the physical sector size of a device
+ */
+errcode_t ext2fs_get_device_phys_sectsize(const char *file, int *sectsize)
+{
+	int	fd;
+
+	fd = ext2fs_open_file(file, O_RDONLY, 0);
+	if (fd < 0)
+		return errno;
+
+#ifdef BLKPBSZGET
+	if (ioctl(fd, BLKPBSZGET, sectsize) >= 0) {
+		close(fd);
+		return 0;
+	}
+#endif
+#ifdef DIOCGSECTORSIZE
+	/* This isn't really the physical sector size, but FreeBSD
+	 * doesn't seem to have this concept. */
+	if (ioctl(fd, DIOCGSECTORSIZE, sectsize) >= 0) {
+		close(fd);
+		return 0;
+	}
+#endif
 	*sectsize = 0;
 	close(fd);
 	return 0;