/*
* getsize.c --- get the size of a partition.
- *
+ *
* Copyright (C) 1995, 1995 Theodore Ts'o.
* Copyright (C) 2003 VMware, Inc.
*
* Windows version of ext2fs_get_device_size by Chris Li, VMware.
- *
+ *
* %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>
#include <errno.h>
#endif
#include <fcntl.h>
-#ifdef HAVE_LINUX_FD_H
+#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
+#endif
+#ifdef HAVE_LINUX_FD_H
#include <linux/fd.h>
#endif
#ifdef HAVE_SYS_DISKLABEL_H
-#include <sys/ioctl.h>
#include <sys/disklabel.h>
-#endif /* HAVE_SYS_DISKLABEL_H */
+#endif
+#ifdef HAVE_SYS_DISK_H
+#include <sys/disk.h>
+#endif
+#ifdef __linux__
+#include <sys/utsname.h>
+#endif
+#if HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#include <ctype.h>
#if defined(__linux__) && defined(_IO) && !defined(BLKGETSIZE)
#define BLKGETSIZE _IO(0x12,96) /* return device size */
#endif
-#ifdef APPLE_DARWIN
-#include <sys/ioctl.h>
-#include <sys/disk.h>
+#if defined(__linux__) && defined(_IOR) && !defined(BLKGETSIZE64)
+#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
+#endif
+#ifdef APPLE_DARWIN
#define BLKGETSIZE DKIOCGETBLOCKCOUNT32
#endif /* APPLE_DARWIN */
#include "windows.h"
#include "winioctl.h"
-errcode_t ext2fs_get_device_size(const char *file, int blocksize,
- blk_t *retblocks)
+#if (_WIN32_WINNT >= 0x0500)
+#define HAVE_GET_FILE_SIZE_EX 1
+#endif
+
+errcode_t ext2fs_get_device_size2(const char *file, int blocksize,
+ blk64_t *retblocks)
{
HANDLE dev;
PARTITION_INFORMATION pi;
DISK_GEOMETRY gi;
DWORD retbytes;
+#ifdef HAVE_GET_FILE_SIZE_EX
+ LARGE_INTEGER filesize;
+#else
+ DWORD filesize;
+#endif /* HAVE_GET_FILE_SIZE_EX */
- dev = CreateFile(file, GENERIC_READ,
+ dev = CreateFile(file, GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE ,
- NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
-
+ NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
+
if (dev == INVALID_HANDLE_VALUE)
return EBADF;
if (DeviceIoControl(dev, IOCTL_DISK_GET_PARTITION_INFO,
&retbytes, NULL)) {
*retblocks = pi.PartitionLength.QuadPart / blocksize;
-
+
} else if (DeviceIoControl(dev, IOCTL_DISK_GET_DRIVE_GEOMETRY,
&gi, sizeof(DISK_GEOMETRY),
&gi, sizeof(DISK_GEOMETRY),
gi.SectorsPerTrack *
gi.TracksPerCylinder *
gi.Cylinders.QuadPart / blocksize;
+
+#ifdef HAVE_GET_FILE_SIZE_EX
+ } else if (GetFileSizeEx(dev, &filesize)) {
+ *retblocks = filesize.QuadPart / blocksize;
}
+#else
+ } else {
+ filesize = GetFileSize(dev, NULL);
+ if (INVALID_FILE_SIZE != filesize) {
+ *retblocks = filesize / blocksize;
+ }
+ }
+#endif /* HAVE_GET_FILE_SIZE_EX */
CloseHandle(dev);
return 0;
/*
* Returns the number of blocks in a partition
*/
-errcode_t ext2fs_get_device_size(const char *file, int blocksize,
- blk_t *retblocks)
+errcode_t ext2fs_get_device_size2(const char *file, int blocksize,
+ blk64_t *retblocks)
{
- int fd;
-#ifdef BLKGETSIZE
- unsigned long size;
-#endif
+ int fd, rc = 0;
+ unsigned long long size64;
ext2_loff_t high, low;
-#ifdef FDGETPRM
- struct floppy_struct this_floppy;
-#endif
-#ifdef HAVE_SYS_DISKLABEL_H
- int part;
- struct disklabel lab;
- struct partition *pp;
- char ch;
-#endif /* HAVE_SYS_DISKLABEL_H */
-#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;
+#if defined DKIOCGETBLOCKCOUNT && defined DKIOCGETBLOCKSIZE /* For Apple Darwin */
+ unsigned int size;
+
+ if (ioctl(fd, DKIOCGETBLOCKCOUNT, &size64) >= 0 &&
+ ioctl(fd, DKIOCGETBLOCKSIZE, &size) >= 0) {
+ *retblocks = size64 * size / blocksize;
+ goto out;
+ }
+#endif
+
+#ifdef BLKGETSIZE64
+ {
+ int valid_blkgetsize64 = 1;
+#ifdef __linux__
+ struct utsname ut;
+
+ if ((uname(&ut) == 0) &&
+ ((ut.release[0] == '2') && (ut.release[1] == '.') &&
+ (ut.release[2] < '6') && (ut.release[3] == '.')))
+ valid_blkgetsize64 = 0;
+#endif
+ if (valid_blkgetsize64 &&
+ ioctl(fd, BLKGETSIZE64, &size64) >= 0) {
+ *retblocks = size64 / blocksize;
+ goto out;
+ }
+ }
+#endif /* BLKGETSIZE64 */
+
#ifdef BLKGETSIZE
- if (ioctl(fd, BLKGETSIZE, &size) >= 0) {
- close(fd);
- *retblocks = size / (blocksize / 512);
- return 0;
+ {
+ unsigned long size;
+
+ if (ioctl(fd, BLKGETSIZE, &size) >= 0) {
+ *retblocks = size / (blocksize / 512);
+ goto out;
+ }
}
#endif
+
#ifdef FDGETPRM
- if (ioctl(fd, FDGETPRM, &this_floppy) >= 0) {
- close(fd);
- *retblocks = this_floppy.size / (blocksize / 512);
- return 0;
+ {
+ struct floppy_struct this_floppy;
+
+ if (ioctl(fd, FDGETPRM, &this_floppy) >= 0) {
+ *retblocks = this_floppy.size / (blocksize / 512);
+ goto out;
+ }
}
#endif
+
#ifdef HAVE_SYS_DISKLABEL_H
- part = strlen(file) - 1;
- if (part >= 0) {
- ch = file[part];
- if (isdigit(ch))
- part = 0;
- else if (ch >= 'a' && ch <= 'h')
- part = ch - 'a';
- else
- part = -1;
- }
- if (part >= 0 && (ioctl(fd, DIOCGDINFO, (char *)&lab) >= 0)) {
- pp = &lab.d_partitions[part];
- if (pp->p_size) {
- close(fd);
- *retblocks = pp->p_size / (blocksize / 512);
- return 0;
+ {
+ int part;
+ struct disklabel lab;
+ struct partition *pp;
+ char ch;
+
+#if defined(DIOCGMEDIASIZE)
+ {
+ off_t ms;
+ u_int bs;
+ if (ioctl(fd, DIOCGMEDIASIZE, &ms) >= 0) {
+ *retblocks = ms / blocksize;
+ goto out;
+ }
+ }
+#elif defined(DIOCGDINFO)
+ /* old disklabel interface */
+ part = strlen(file) - 1;
+ if (part >= 0) {
+ ch = file[part];
+ if (isdigit(ch))
+ part = 0;
+ else if (ch >= 'a' && ch <= 'h')
+ part = ch - 'a';
+ else
+ part = -1;
}
+ if (part >= 0 && (ioctl(fd, DIOCGDINFO, (char *)&lab) >= 0)) {
+ pp = &lab.d_partitions[part];
+ if (pp->p_size) {
+ *retblocks = pp->p_size / (blocksize / 512);
+ goto out;
+ }
+ }
+#endif /* defined(DIOCG*) */
}
#endif /* HAVE_SYS_DISKLABEL_H */
+ {
+ ext2fs_struct_stat st;
+
+ if (ext2fs_fstat(fd, &st) == 0)
+ if (S_ISREG(st.st_mode)) {
+ *retblocks = st.st_size / blocksize;
+ goto out;
+ }
+ }
+
/*
* OK, we couldn't figure it out by using a specialized ioctl,
* which is generally the best way. So do binary search to
* find the size of the partition.
*/
low = 0;
- for (high = 1024; valid_offset (fd, high); high *= 2)
+ for (high = 1024; valid_offset(fd, high); high *= 2)
low = high;
- while (low < high - 1)
- {
+ while (low < high - 1) {
const ext2_loff_t mid = (low + high) / 2;
if (valid_offset (fd, mid))
else
high = mid;
}
- valid_offset (fd, 0);
+ valid_offset(fd, 0);
+ size64 = low + 1;
+ *retblocks = size64 / blocksize;
+out:
close(fd);
- *retblocks = (low + 1) / blocksize;
- return 0;
+ return rc;
}
#endif /* WIN32 */
+errcode_t ext2fs_get_device_size(const char *file, int blocksize,
+ blk_t *retblocks)
+{
+ errcode_t retval;
+ blk64_t blocks;
+
+ retval = ext2fs_get_device_size2(file, blocksize, &blocks);
+ if (retval)
+ return retval;
+ if (blocks >= (1ULL << 32))
+ return EFBIG;
+ *retblocks = (blk_t) blocks;
+ return 0;
+}
+
#ifdef DEBUG
int main(int argc, char **argv)
{
blk_t blocks;
int retval;
-
+
if (argc < 2) {
fprintf(stderr, "Usage: %s device\n", argv[0]);
exit(1);
"while calling ext2fs_get_device_size");
exit(1);
}
- printf("Device %s has %d 1k blocks.\n", argv[1], blocks);
+ printf("Device %s has %u 1k blocks.\n", argv[1], blocks);
exit(0);
}
#endif
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff