[PATCH] qemu-xen-trad/block: add support for NetBSD phy interfaces

[Roger Pau Monne <roger.pau@citrix.com>]

Add support for NetBSD to get the correct size for phy block devices,
and use character devices instead of block devices.

This has been in pkgsrc tree for a long time, and is present in upstream qemu.
It is not pretty, but I'm fairly confident that it doesn't break anything on
the Linux side.

Signed-off-by: Roger Pau Monne <roger.pau@citrix.com>
---
 block-raw-posix.c |   51 +++++++++++++++++++++++++++++++++++++++++++++++++--
 1 files changed, 49 insertions(+), 2 deletions(-)

diff --git a/block-raw-posix.c b/block-raw-posix.c
index 9a02d4f..7429c7b 100644
--- a/block-raw-posix.c
+++ b/block-raw-posix.c
@@ -66,6 +66,13 @@
 #include <sys/disklabel.h>
 #include <sys/dkio.h>
 #endif
+#if defined(__NetBSD__)
+#include <sys/ioctl.h>
+#include <sys/disklabel.h>
+#include <sys/dkio.h>
+#define SLIST_ENTRY(x) int /*XXXX !*/
+#include <sys/disk.h>
+#endif
 
 //#define DEBUG_FLOPPY
 
@@ -120,6 +127,33 @@ static int raw_open(BlockDriverState *bs, const char *filename, int flags)
 {
     BDRVRawState *s = bs->opaque;
     int fd, open_flags, ret;
+#ifdef __NetBSD__
+    struct stat sb;
+    static char namebuf[MAXPATHLEN];
+    const char *dp;
+
+    if (lstat(filename, &sb) < 0) {
+        fprintf(stderr, "%s: stat failed: %s\n", filename, strerror(errno));
+        return -errno;
+    }
+    if (S_ISLNK(sb.st_mode)) {
+        fprintf(stderr, "%s: symolink links not supported by qemu-dm\n",
+                        filename);
+        return -EINVAL;
+    }
+    if (S_ISBLK(sb.st_mode)) {
+        dp = strrchr(filename, '/');
+        if (dp == NULL) {
+            snprintf(namebuf, MAXPATHLEN, "r%s", filename);
+        } else {
+            snprintf(namebuf, MAXPATHLEN, "%.*s/r%s",
+                     (int)(dp - filename), filename, dp + 1);
+        }
+        fprintf(stderr, "%s is a block device", filename);
+        filename = namebuf;
+        fprintf(stderr, ", using %s\n", filename);
+    }
+#endif
 
     posix_aio_init();
 
@@ -749,7 +783,7 @@ static int raw_truncate(BlockDriverState *bs, int64_t offset)
     return 0;
 }
 
-#ifdef __OpenBSD__
+#if defined(__OpenBSD__) || defined(__NetBSD__)
 static int64_t raw_getlength(BlockDriverState *bs)
 {
     BDRVRawState *s = bs->opaque;
@@ -759,16 +793,29 @@ static int64_t raw_getlength(BlockDriverState *bs)
     if (fstat(fd, &st))
         return -1;
     if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
+#if defined(__OpenBSD__)
         struct disklabel dl;
 
         if (ioctl(fd, DIOCGDINFO, &dl))
             return -1;
         return (uint64_t)dl.d_secsize *
             dl.d_partitions[DISKPART(st.st_rdev)].p_size;
+#else
+        struct dkwedge_info dkw;
+        if (ioctl(fd, DIOCGWEDGEINFO, &dkw) != -1) {
+            return dkw.dkw_size * 512;
+        }  else {
+            struct disklabel dl;
+            if(ioctl(fd, DIOCGDINFO, &dl))
+                return -1;
+            return (uint64_t)dl.d_secsize *
+                   dl.d_partitions[DISKPART(st.st_rdev)].p_size;
+        }
+#endif
     } else
         return st.st_size;
 }
-#else /* !__OpenBSD__ */
+#else /* !__OpenBSD__ && ! __NetBSD__  */
 static int64_t  raw_getlength(BlockDriverState *bs)
 {
     BDRVRawState *s = bs->opaque;
-- 
1.7.7.5 (Apple Git-26)