Link kvstore into main build system.

[bluesky.git] / bluesky / store-s3.c

diff --git a/bluesky/store-s3.c b/bluesky/store-s3.c
new file mode 100644 (file)
index 0000000..ccf0878
--- /dev/null
+++ b/bluesky/store-s3.c
@@ -0,0 +1,209 @@
+/* Blue Sky: File Systems in the Cloud
+ *
+ * Copyright (C) 2009  The Regents of the University of California
+ * Written by Michael Vrable <mvrable@cs.ucsd.edu>
+ *
+ * TODO: Licensing
+ */
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <glib.h>
+#include <string.h>
+
+#include "bluesky-private.h"
+#include "libs3.h"
+
+/* Interface to Amazon S3 storage. */
+
+typedef struct {
+    GThreadPool *thread_pool;
+    S3BucketContext bucket;
+    uint8_t encryption_key[CRYPTO_KEY_SIZE];
+} S3Store;
+
+typedef struct {
+    enum { S3_GET, S3_PUT } op;
+    gchar *key;
+    BlueSkyRCStr *data;
+} S3Op;
+
+struct get_info {
+    int success;
+    GString *buf;
+};
+
+struct put_info {
+    BlueSkyRCStr *val;
+    gint offset;
+};
+
+static S3Status s3store_get_handler(int bufferSize, const char *buffer,
+                                    void *callbackData)
+{
+    struct get_info *info = (struct get_info *)callbackData;
+    g_string_append_len(info->buf, buffer, bufferSize);
+    return S3StatusOK;
+}
+
+static int s3store_put_handler(int bufferSize, char *buffer,
+                               void *callbackData)
+{
+    struct put_info *info = (struct put_info *)callbackData;
+    gint bytes = MIN(bufferSize, (int)(info->val->len - info->offset));
+    memcpy(buffer, (char *)info->val->data + info->offset, bytes);
+    info->offset += bytes;
+    return bytes;
+}
+
+static S3Status s3store_properties_callback(const S3ResponseProperties *properties,
+                                     void *callbackData)
+{
+    return S3StatusOK;
+}
+
+static void s3store_response_callback(S3Status status,
+                               const S3ErrorDetails *errorDetails,
+                               void *callbackData)
+{
+    struct get_info *info = (struct get_info *)callbackData;
+
+    if (status == 0) {
+        info->success = 1;
+    }
+
+    if (errorDetails != NULL && errorDetails->message != NULL) {
+        g_print("  Error message: %s\n", errorDetails->message);
+    }
+}
+
+static void s3store_task(gpointer a, gpointer s)
+{
+    BlueSkyStoreAsync *async = (BlueSkyStoreAsync *)a;
+    S3Store *store = (S3Store *)s;
+
+    async->status = ASYNC_RUNNING;
+
+    if (async->op == STORE_OP_GET) {
+        struct get_info info;
+        info.buf = g_string_new("");
+        info.success = 0;
+
+        struct S3GetObjectHandler handler;
+        handler.responseHandler.propertiesCallback = s3store_properties_callback;
+        handler.responseHandler.completeCallback = s3store_response_callback;
+        handler.getObjectDataCallback = s3store_get_handler;
+
+        S3_get_object(&store->bucket, async->key, NULL, 0, 0, NULL,
+                      &handler, &info);
+
+        if (info.success) {
+            BlueSkyRCStr *raw, *decrypted;
+            raw = bluesky_string_new_from_gstring(info.buf);
+            decrypted = bluesky_crypt_decrypt(raw, store->encryption_key);
+            bluesky_string_unref(raw);
+            async->data = decrypted;
+            async->result = 0;
+        } else {
+            g_string_free(info.buf, TRUE);
+        }
+
+    } else if (async->op == STORE_OP_PUT) {
+        BlueSkyRCStr *encrypted = bluesky_crypt_encrypt(async->data,
+                                                        store->encryption_key);
+
+        struct put_info info;
+        info.val = encrypted;
+        info.offset = 0;
+
+        struct S3PutObjectHandler handler;
+        handler.responseHandler.propertiesCallback
+            = s3store_properties_callback;
+        handler.responseHandler.completeCallback = s3store_response_callback;
+        handler.putObjectDataCallback = s3store_put_handler;
+
+        S3_put_object(&store->bucket, async->key, encrypted->len, NULL, NULL,
+                      &handler, &info);
+
+        bluesky_string_unref(encrypted);
+
+        async->result = 0;
+    }
+
+    bluesky_store_async_mark_complete(async);
+    bluesky_store_async_unref(async);
+}
+
+static gpointer s3store_new()
+{
+    S3Store *store = g_new(S3Store, 1);
+    store->thread_pool = g_thread_pool_new(s3store_task, store, -1, FALSE,
+                                           NULL);
+    store->bucket.bucketName = "mvrable-bluesky";
+    store->bucket.protocol = S3ProtocolHTTP;
+    store->bucket.uriStyle = S3UriStylePath;
+    store->bucket.accessKeyId = getenv("AWS_ACCESS_KEY_ID");
+    store->bucket.secretAccessKey = getenv("AWS_SECRET_ACCESS_KEY");
+
+    const char *key = getenv("BLUESKY_KEY");
+    if (key == NULL) {
+        g_error("Encryption key not defined; please set BLUESKY_KEY environment variable");
+        exit(1);
+    }
+
+    bluesky_crypt_hash_key(key, store->encryption_key);
+
+    g_print("Initializing S3 with bucket %s, access key %s, encryption key %s\n",
+            store->bucket.bucketName, store->bucket.accessKeyId, key);
+
+    return store;
+}
+
+static void s3store_destroy(gpointer store)
+{
+    g_free(store);
+}
+
+static void s3store_submit(gpointer s, BlueSkyStoreAsync *async)
+{
+    S3Store *store = (S3Store *)s;
+    g_return_if_fail(async->status == ASYNC_NEW);
+    g_return_if_fail(async->op != STORE_OP_NONE);
+
+    switch (async->op) {
+    case STORE_OP_GET:
+    case STORE_OP_PUT:
+        async->status = ASYNC_PENDING;
+        bluesky_store_async_ref(async);
+        g_thread_pool_push(store->thread_pool, async, NULL);
+        break;
+
+    default:
+        g_warning("Uknown operation type for S3Store: %d\n", async->op);
+        bluesky_store_async_mark_complete(async);
+        break;
+    }
+}
+
+static void s3store_cleanup(gpointer store, BlueSkyStoreAsync *async)
+{
+    GString *buf = (GString *)async->store_private;
+
+    if (buf != NULL) {
+        g_string_free(buf, TRUE);
+        async->store_private = NULL;
+    }
+}
+
+static BlueSkyStoreImplementation store_impl = {
+    .create = s3store_new,
+    .destroy = s3store_destroy,
+    .submit = s3store_submit,
+    .cleanup = s3store_cleanup,
+};
+
+void bluesky_store_init_s3(void)
+{
+    S3_initialize(NULL, S3_INIT_ALL);
+    bluesky_store_register(&store_impl, "s3");
+}