remove rules to tidy up tmp libtool files - we use the installed version now.

[thirdparty/xfsprogs-dev.git] / libdisk / xvm.c

diff --git a/libdisk/xvm.c b/libdisk/xvm.c
index 6891811f4f49e2c251434428344ace77991fd2b4..f53df83e0f055b67fb70197ec329a2b1ab79e0ca 100644 (file)
--- a/libdisk/xvm.c
+++ b/libdisk/xvm.c
@@ -38,10 +38,11 @@
 #include <volume.h>
 #include "xvm.h"
 
-static int
+int
 mnt_is_xvm_subvol(dev_t dev)
 {
-       /* TODO - DeanJ? - for now, always return false */
+       if (major(dev) == get_driver_block_major("xvm"))
+               return 1;
        return 0;
 }
 
@@ -62,10 +63,43 @@ xvm_get_subvol_stripe(
        int             *swidth,
        struct stat64   *sb)
 {
-       if (!mnt_is_xvm_subvol(sb->st_dev))
+       int fd;
+       xvm_getdev_t getdev;
+       xvm_subvol_stripe_t subvol_stripe;
+
+       if (!mnt_is_xvm_subvol(sb->st_rdev))
                return 0;
 
-       /* TODO - DeanJ? - for now, always return false */
+       /*
+        * This will actually open the data subvolume.
+        */
+       if ((fd = open(dev, O_RDONLY)) < 0)
+               return 0;
 
-       return 0;
+       /*
+        * Go and get the the information for the correct
+        * subvolume.
+        */
+       if (ioctl(fd, DIOCGETVOLDEV, &getdev) < 0) {
+               close(fd);
+               return 0;
+       }
+       if ( (type == SVTYPE_RT) && (getdev.rt_subvol_dev) )
+               subvol_stripe.dev = getdev.rt_subvol_dev;
+       else if ( (type == SVTYPE_DATA) && (getdev.data_subvol_dev) )
+               subvol_stripe.dev = getdev.data_subvol_dev;
+       else {
+               close(fd);
+               return 0;
+       }
+
+       if (ioctl(fd, DIOCGETVOLSTRIPE, &subvol_stripe) < 0) {
+               close(fd);
+               return 0;
+       }
+
+       *sunit = subvol_stripe.unit_size;
+       *swidth = *sunit * subvol_stripe.width_size;
+       close(fd);
+       return 1;
 }