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Introduce image names and metadata storage in etcd

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Each inode has: image name, parent inode number & pool, size and readonly flag

Snapshots are created by switching image name to a different inode number
while using the older inode as parent.
This commit is contained in:
Vitaliy Filippov
2021-04-10 17:44:12 +03:00
parent ab39ce2bbb
commit 2612d3198a
9 changed files with 301 additions and 70 deletions
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src/qemu_proxy.h
+6 -1
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@@ -15,12 +15,17 @@ extern "C" {
#endif
// Our exports
typedef void VitastorIOHandler(int retval, void *opaque);
typedef void VitastorIOHandler(long retval, void *opaque);
void* vitastor_proxy_create(AioContext *ctx, const char *etcd_host, const char *etcd_prefix);
void vitastor_proxy_destroy(void *client);
void vitastor_proxy_rw(int write, void *client, uint64_t inode, uint64_t offset, uint64_t len,
struct iovec *iov, int iovcnt, VitastorIOHandler cb, void *opaque);
void vitastor_proxy_sync(void *client, VitastorIOHandler cb, void *opaque);
void vitastor_proxy_watch_metadata(void *client, char *image, VitastorIOHandler cb, void *opaque);
void vitastor_proxy_close_watch(void *client, void *watch);
uint64_t vitastor_proxy_get_size(void *watch);
uint64_t vitastor_proxy_get_inode_num(void *watch);
int vitastor_proxy_get_readonly(void *watch);
#ifdef __cplusplus
}