[tip:tools/kvm] kvm tools: Introduce struct disk_image_params

[tip-bot for Asias He <asias.hejun@xxxxxxxxx>]

Commit-ID:  d04dddfb6b4397939bbfe7b80e16d0d253324ce1
Gitweb:     http://git.kernel.org/tip/d04dddfb6b4397939bbfe7b80e16d0d253324ce1
Author:     Asias He <asias.hejun@xxxxxxxxx>
AuthorDate: Thu, 12 Jul 2012 01:16:50 +0800
Committer:  Pekka Enberg <penberg@xxxxxxxxxx>
CommitDate: Thu, 12 Jul 2012 10:09:36 +0300

kvm tools: Introduce struct disk_image_params

Introduce struct disk_image_params to contain all the disk image parameters.
This is useful for adding more disk image parameters, e.g. disk image
cache mode.

Signed-off-by: Asias He <asias.hejun@xxxxxxxxx>
Signed-off-by: Pekka Enberg <penberg@xxxxxxxxxx>
---
 tools/kvm/builtin-run.c            |   11 +++++------
 tools/kvm/disk/core.c              |   15 +++++++++------
 tools/kvm/include/kvm/disk-image.h |    7 ++++++-
 3 files changed, 20 insertions(+), 13 deletions(-)

diff --git a/tools/kvm/builtin-run.c b/tools/kvm/builtin-run.c
index 4f6ea15..a120fe2 100644
--- a/tools/kvm/builtin-run.c
+++ b/tools/kvm/builtin-run.c
@@ -68,6 +68,7 @@ struct kvm *kvm;
 struct kvm_cpu **kvm_cpus;
 __thread struct kvm_cpu *current_kvm_cpu;
 
+static struct disk_image_params disk_image[MAX_DISK_IMAGES];
 static u64 ram_size;
 static u8  image_count;
 static u8 num_net_devices;
@@ -77,7 +78,6 @@ static const char *kernel_filename;
 static const char *vmlinux_filename;
 static const char *initrd_filename;
 static const char *firmware_filename;
-static const char *image_filename[MAX_DISK_IMAGES];
 static const char *console;
 static const char *dev;
 static const char *network;
@@ -92,7 +92,6 @@ static const char *hugetlbfs_path;
 static const char *custom_rootfs_name = "default";
 static struct virtio_net_params *net_params;
 static bool single_step;
-static bool readonly_image[MAX_DISK_IMAGES];
 static bool vnc;
 static bool sdl;
 static bool balloon;
@@ -169,11 +168,11 @@ static int img_name_parser(const struct option *opt, const char *arg, int unset)
 	if (image_count >= MAX_DISK_IMAGES)
 		die("Currently only 4 images are supported");
 
-	image_filename[image_count] = arg;
+	disk_image[image_count].filename = arg;
 	sep = strstr(arg, ",");
 	if (sep) {
 		if (strcmp(sep + 1, "ro") == 0)
-			readonly_image[image_count] = 1;
+			disk_image[image_count].readonly = true;
 		*sep = 0;
 	}
 
@@ -1099,7 +1098,7 @@ static int kvm_cmd_run_init(int argc, const char **argv)
 	if (kernel_cmdline)
 		strlcat(real_cmdline, kernel_cmdline, sizeof(real_cmdline));
 
-	if (!using_rootfs && !image_filename[0] && !initrd_filename) {
+	if (!using_rootfs && !disk_image[0].filename && !initrd_filename) {
 		char tmp[PATH_MAX];
 
 		kvm_setup_create_new(custom_rootfs_name);
@@ -1131,7 +1130,7 @@ static int kvm_cmd_run_init(int argc, const char **argv)
 
 	if (image_count) {
 		kvm->nr_disks = image_count;
-		kvm->disks = disk_image__open_all(image_filename, readonly_image, image_count);
+		kvm->disks = disk_image__open_all((struct disk_image_params *)&disk_image, image_count);
 		if (IS_ERR(kvm->disks)) {
 			r = PTR_ERR(kvm->disks);
 			pr_err("disk_image__open_all() failed with error %ld\n",
diff --git a/tools/kvm/disk/core.c b/tools/kvm/disk/core.c
index 2739dcd..5542d42 100644
--- a/tools/kvm/disk/core.c
+++ b/tools/kvm/disk/core.c
@@ -111,12 +111,13 @@ struct disk_image *disk_image__open(const char *filename, bool readonly)
 	return ERR_PTR(-ENOSYS);
 }
 
-struct disk_image **disk_image__open_all(const char **filenames,
-					 bool *readonly, int count)
+struct disk_image **disk_image__open_all(struct disk_image_params *params, int count)
 {
 	struct disk_image **disks;
-	int i;
+	const char *filename;
+	bool readonly;
 	void *err;
+	int i;
 
 	if (!count)
 		return ERR_PTR(-EINVAL);
@@ -128,12 +129,14 @@ struct disk_image **disk_image__open_all(const char **filenames,
 		return ERR_PTR(-ENOMEM);
 
 	for (i = 0; i < count; i++) {
-		if (!filenames[i])
+		filename = params[i].filename;
+		readonly = params[i].readonly;
+		if (!filename)
 			continue;
 
-		disks[i] = disk_image__open(filenames[i], readonly[i]);
+		disks[i] = disk_image__open(filename, readonly);
 		if (IS_ERR_OR_NULL(disks[i])) {
-			pr_err("Loading disk image '%s' failed", filenames[i]);
+			pr_err("Loading disk image '%s' failed", filename);
 			err = disks[i];
 			goto error;
 		}
diff --git a/tools/kvm/include/kvm/disk-image.h b/tools/kvm/include/kvm/disk-image.h
index 9671438..5d09875 100644
--- a/tools/kvm/include/kvm/disk-image.h
+++ b/tools/kvm/include/kvm/disk-image.h
@@ -39,6 +39,11 @@ struct disk_image_operations {
 	int (*close)(struct disk_image *disk);
 };
 
+struct disk_image_params {
+	const char *filename;
+	bool readonly;
+};
+
 struct disk_image {
 	int				fd;
 	u64				size;
@@ -54,7 +59,7 @@ struct disk_image {
 };
 
 struct disk_image *disk_image__open(const char *filename, bool readonly);
-struct disk_image **disk_image__open_all(const char **filenames, bool *readonly, int count);
+struct disk_image **disk_image__open_all(struct disk_image_params *params, int count);
 struct disk_image *disk_image__new(int fd, u64 size, struct disk_image_operations *ops, int mmap);
 int disk_image__close(struct disk_image *disk);
 int disk_image__close_all(struct disk_image **disks, int count);
--
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