minios: get VBD CD/removable/RO info

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

diff --git a/blkfront.c b/blkfront.c
index f5cf19cbe59667d03e58151cc47e9cd752215ae2..3a6c22acebd7f42335a4c9695cbe34f86b4a4f89 100644 (file)
--- a/blkfront.c
+++ b/blkfront.c
@@ -70,7 +70,7 @@ void blkfront_handler(evtchn_port_t port, struct pt_regs *regs, void *data)
     wake_up(&blkfront_queue);
 }
 
-struct blkfront_dev *init_blkfront(char *nodename, uint64_t *sectors, unsigned *sector_size, int *mode)
+struct blkfront_dev *init_blkfront(char *nodename, uint64_t *sectors, unsigned *sector_size, int *mode, int *info)
 {
     xenbus_transaction_t xbt;
     char* err;
@@ -176,6 +176,9 @@ done:
 
         xenbus_unwatch_path(XBT_NIL, path);
 
+        snprintf(path, sizeof(path), "%s/info", dev->backend);
+        *info = xenbus_read_integer(path);
+
         snprintf(path, sizeof(path), "%s/sectors", dev->backend);
         // FIXME: read_integer returns an int, so disk size limited to 1TB for now
         *sectors = dev->sectors = xenbus_read_integer(path);

diff --git a/include/blkfront.h b/include/blkfront.h
index 034c793ff679278013223775e2696b8f6f682fc2..687f8434dcfba06f19a0607cefc22b41897b62aa 100644 (file)
--- a/include/blkfront.h
+++ b/include/blkfront.h
@@ -15,7 +15,7 @@ struct blkfront_aiocb
 
     void (*aio_cb)(struct blkfront_aiocb *aiocb, int ret);
 };
-struct blkfront_dev *init_blkfront(char *nodename, uint64_t *sectors, unsigned *sector_size, int *mode);
+struct blkfront_dev *init_blkfront(char *nodename, uint64_t *sectors, unsigned *sector_size, int *mode, int *info);
 #ifdef HAVE_LIBC
 int blkfront_open(struct blkfront_dev *dev);
 #endif

diff --git a/kernel.c b/kernel.c
index a9074fdcf68eee9c0d2586d5cf7cccbb4fab6983..96535e5ec7a491a5cef99a28dfc1ce9c764d498d 100644 (file)
--- a/kernel.c
+++ b/kernel.c
@@ -207,10 +207,19 @@ static void blk_write_sector(uint64_t sector)
 static void blkfront_thread(void *p)
 {
     time_t lasttime = 0;
-    blk_dev = init_blkfront(NULL, &blk_sectors, &blk_sector_size, &blk_mode);
+    int blk_info;
+
+    blk_dev = init_blkfront(NULL, &blk_sectors, &blk_sector_size, &blk_mode, &blk_info);
     if (!blk_dev)
         return;
 
+    if (blk_info & VDISK_CDROM)
+        printk("Block device is a CDROM\n");
+    if (blk_info & VDISK_REMOVABLE)
+        printk("Block device is removable\n");
+    if (blk_info & VDISK_READONLY)
+        printk("Block device is read-only\n");
+
 #ifdef BLKTEST_WRITE
     if (blk_mode == O_RDWR) {
         blk_write_sector(0);