libext2fs: create the inode bitmap checksum

[tools/e2fsprogs.git] / lib / blkid / getsize.c

diff --git a/lib/blkid/getsize.c b/lib/blkid/getsize.c
index da809dc..f670e1b 100644 (file)
--- a/lib/blkid/getsize.c
+++ b/lib/blkid/getsize.c
@@ -12,6 +12,10 @@
 #define _LARGEFILE_SOURCE
 #define _LARGEFILE64_SOURCE
 
+/* include this before sys/queues.h! */
+#include "config.h"
+#include "blkidP.h"
+
 #include <stdio.h>
 #if HAVE_UNISTD_H
 #include <unistd.h>
@@ -20,21 +24,41 @@
 #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 /* HAVE_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
+#ifdef HAVE_SYS_QUEUE_H
+#include <sys/queue.h> /* for LIST_HEAD */
+#endif
+#include <sys/disk.h>
+#endif
+#ifdef __linux__
+#include <sys/utsname.h>
+#endif
+#if HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
 
-#include "blkidP.h"
 
 #if defined(__linux__) && defined(_IO) && !defined(BLKGETSIZE)
 #define BLKGETSIZE _IO(0x12,96)        /* return device size */
 #endif
 
+#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 */
+
 static int valid_offset(int fd, blkid_loff_t offset)
 {
        char ch;
@@ -47,49 +71,98 @@ static int valid_offset(int fd, blkid_loff_t offset)
 }
 
 /*
- * Returns the number of blocks in a partition
+ * Returns the number of bytes in a partition
  */
 blkid_loff_t blkid_get_dev_size(int fd)
 {
-#ifdef BLKGETSIZE
-       unsigned long size;
+       int valid_blkgetsize64 = 1;
+#ifdef __linux__
+       struct          utsname ut;
 #endif
+       unsigned long long size64;
+       unsigned long size;
        blkid_loff_t high, low;
 #ifdef FDGETPRM
        struct floppy_struct this_floppy;
 #endif
 #ifdef HAVE_SYS_DISKLABEL_H
-       int part;
+       int part = -1;
        struct disklabel lab;
        struct partition *pp;
        char ch;
+       struct stat st;
 #endif /* HAVE_SYS_DISKLABEL_H */
 
+#ifdef DKIOCGETBLOCKCOUNT      /* For Apple Darwin */
+       if (ioctl(fd, DKIOCGETBLOCKCOUNT, &size64) >= 0) {
+               if ((sizeof(blkid_loff_t) < sizeof(unsigned long long))
+                   && (size64 << 9 > 0xFFFFFFFF))
+                       return 0; /* EFBIG */
+               return (blkid_loff_t) size64 << 9;
+       }
+#endif
+
+#ifdef BLKGETSIZE64
+#ifdef __linux__
+       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) {
+               if ((sizeof(blkid_loff_t) < sizeof(unsigned long long))
+                   && ((size64) > 0xFFFFFFFF))
+                       return 0; /* EFBIG */
+               return size64;
+       }
+#endif /* BLKGETSIZE64 */
+
 #ifdef BLKGETSIZE
        if (ioctl(fd, BLKGETSIZE, &size) >= 0)
                return (blkid_loff_t)size << 9;
 #endif
+
+/* tested on FreeBSD 6.1-RELEASE i386 */
+#ifdef DIOCGMEDIASIZE
+       if (ioctl(fd, DIOCGMEDIASIZE, &size64) >= 0)
+               return (off_t)size64;
+#endif /* DIOCGMEDIASIZE */
+
 #ifdef FDGETPRM
        if (ioctl(fd, FDGETPRM, &this_floppy) >= 0)
                return (blkid_loff_t)this_floppy.size << 9;
 #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;
-       }
+       /*
+        * This code works for FreeBSD 4.11 i386, except for the full device
+        * (such as /dev/ad0). It doesn't work properly for newer FreeBSD
+        * though. FreeBSD >= 5.0 should be covered by the DIOCGMEDIASIZE
+        * above however.
+        *
+        * Note that FreeBSD >= 4.0 has disk devices as unbuffered (raw,
+        * character) devices, so we need to check for S_ISCHR, too.
+        */
+       if (fstat(fd, &st) >= 0 && (S_ISBLK(st.st_mode) || S_ISCHR(st.st_mode)))
+               part = st.st_rdev & 7;
+
        if (part >= 0 && (ioctl(fd, DIOCGDINFO, (char *)&lab) >= 0)) {
                pp = &lab.d_partitions[part];
                if (pp->p_size)
                        return pp->p_size << 9;
        }
 #endif /* HAVE_SYS_DISKLABEL_H */
+       {
+#if defined(HAVE_FSTAT64) && !defined(__OSX_AVAILABLE_BUT_DEPRECATED)
+               struct stat64   st;
+               if (fstat64(fd, &st) == 0)
+#else
+               struct stat     st;
+               if (fstat(fd, &st) == 0)
+#endif
+                       if (S_ISREG(st.st_mode))
+                               return st.st_size;
+       }
 
        /*
         * OK, we couldn't figure it out by using a specialized ioctl,
@@ -99,8 +172,7 @@ blkid_loff_t blkid_get_dev_size(int fd)
        low = 0;
        for (high = 1024; valid_offset(fd, high); high *= 2)
                low = high;
-       while (low < high - 1)
-       {
+       while (low < high - 1) {
                const blkid_loff_t mid = (low + high) / 2;
 
                if (valid_offset(fd, mid))
@@ -114,7 +186,7 @@ blkid_loff_t blkid_get_dev_size(int fd)
 #ifdef TEST_PROGRAM
 int main(int argc, char **argv)
 {
-       blkid_loff_t bytes;
+       long long bytes;
        int     fd;
 
        if (argc < 2) {
@@ -127,7 +199,8 @@ int main(int argc, char **argv)
                perror(argv[0]);
 
        bytes = blkid_get_dev_size(fd);
-       printf("Device %s has %Ld 1k blocks.\n", argv[1], bytes >> 10);
+       printf("Device %s has %Ld 1k blocks.\n", argv[1],
+              (unsigned long long) bytes >> 10);
 
        return 0;
 }