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authorK. Y. Srinivasan <kys@microsoft.com>2012-03-16 08:02:27 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-03-16 13:36:04 -0700
commitadc80ae60eae24a43a357bf5b30fb496f34aa605 (patch)
treeb7d870f69c8deefe14da8e6cf38c8d1122bd4f1d /tools/hv
parentdb425334e5bb7fa65bbbd7bea9d79842f65bcf45 (diff)
Tools: hv: Support enumeration from all the pools
We have only supported enumeration only from the AUTO pool. Now support enumeration from all the available pools. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/hv')
-rw-r--r--tools/hv/hv_kvp_daemon.c124
1 files changed, 117 insertions, 7 deletions
diff --git a/tools/hv/hv_kvp_daemon.c b/tools/hv/hv_kvp_daemon.c
index 2fb9c3d09d7f..146fd6147e84 100644
--- a/tools/hv/hv_kvp_daemon.c
+++ b/tools/hv/hv_kvp_daemon.c
@@ -148,6 +148,51 @@ static void kvp_update_file(int pool)
kvp_release_lock(pool);
}
+static void kvp_update_mem_state(int pool)
+{
+ FILE *filep;
+ size_t records_read = 0;
+ struct kvp_record *record = kvp_file_info[pool].records;
+ struct kvp_record *readp;
+ int num_blocks = kvp_file_info[pool].num_blocks;
+ int alloc_unit = sizeof(struct kvp_record) * ENTRIES_PER_BLOCK;
+
+ kvp_acquire_lock(pool);
+
+ filep = fopen(kvp_file_info[pool].fname, "r");
+ if (!filep) {
+ kvp_release_lock(pool);
+ syslog(LOG_ERR, "Failed to open file, pool: %d", pool);
+ exit(-1);
+ }
+ while (!feof(filep)) {
+ readp = &record[records_read];
+ records_read += fread(readp, sizeof(struct kvp_record),
+ ENTRIES_PER_BLOCK * num_blocks,
+ filep);
+
+ if (!feof(filep)) {
+ /*
+ * We have more data to read.
+ */
+ num_blocks++;
+ record = realloc(record, alloc_unit * num_blocks);
+
+ if (record == NULL) {
+ syslog(LOG_ERR, "malloc failed");
+ exit(-1);
+ }
+ continue;
+ }
+ break;
+ }
+
+ kvp_file_info[pool].num_blocks = num_blocks;
+ kvp_file_info[pool].records = record;
+ kvp_file_info[pool].num_records = records_read;
+
+ kvp_release_lock(pool);
+}
static int kvp_file_init(void)
{
int ret, fd;
@@ -223,8 +268,16 @@ static int kvp_key_delete(int pool, __u8 *key, int key_size)
{
int i;
int j, k;
- int num_records = kvp_file_info[pool].num_records;
- struct kvp_record *record = kvp_file_info[pool].records;
+ int num_records;
+ struct kvp_record *record;
+
+ /*
+ * First update the in-memory state.
+ */
+ kvp_update_mem_state(pool);
+
+ num_records = kvp_file_info[pool].num_records;
+ record = kvp_file_info[pool].records;
for (i = 0; i < num_records; i++) {
if (memcmp(key, record[i].key, key_size))
@@ -259,14 +312,23 @@ static int kvp_key_add_or_modify(int pool, __u8 *key, int key_size, __u8 *value,
{
int i;
int j, k;
- int num_records = kvp_file_info[pool].num_records;
- struct kvp_record *record = kvp_file_info[pool].records;
- int num_blocks = kvp_file_info[pool].num_blocks;
+ int num_records;
+ struct kvp_record *record;
+ int num_blocks;
if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
(value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
return 1;
+ /*
+ * First update the in-memory state.
+ */
+ kvp_update_mem_state(pool);
+
+ num_records = kvp_file_info[pool].num_records;
+ record = kvp_file_info[pool].records;
+ num_blocks = kvp_file_info[pool].num_blocks;
+
for (i = 0; i < num_records; i++) {
if (memcmp(key, record[i].key, key_size))
continue;
@@ -304,13 +366,21 @@ static int kvp_get_value(int pool, __u8 *key, int key_size, __u8 *value,
int value_size)
{
int i;
- int num_records = kvp_file_info[pool].num_records;
- struct kvp_record *record = kvp_file_info[pool].records;
+ int num_records;
+ struct kvp_record *record;
if ((key_size > HV_KVP_EXCHANGE_MAX_KEY_SIZE) ||
(value_size > HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
return 1;
+ /*
+ * First update the in-memory state.
+ */
+ kvp_update_mem_state(pool);
+
+ num_records = kvp_file_info[pool].num_records;
+ record = kvp_file_info[pool].records;
+
for (i = 0; i < num_records; i++) {
if (memcmp(key, record[i].key, key_size))
continue;
@@ -324,6 +394,31 @@ static int kvp_get_value(int pool, __u8 *key, int key_size, __u8 *value,
return 1;
}
+static void kvp_pool_enumerate(int pool, int index, __u8 *key, int key_size,
+ __u8 *value, int value_size)
+{
+ struct kvp_record *record;
+
+ /*
+ * First update our in-memory database.
+ */
+ kvp_update_mem_state(pool);
+ record = kvp_file_info[pool].records;
+
+ if (index >= kvp_file_info[pool].num_records) {
+ /*
+ * This is an invalid index; terminate enumeration;
+ * - a NULL value will do the trick.
+ */
+ strcpy(value, "");
+ return;
+ }
+
+ memcpy(key, record[index].key, key_size);
+ memcpy(value, record[index].value, value_size);
+}
+
+
void kvp_get_os_info(void)
{
FILE *file;
@@ -678,6 +773,21 @@ int main(void)
if (hv_msg->kvp_hdr.operation != KVP_OP_ENUMERATE)
goto kvp_done;
+ /*
+ * If the pool is KVP_POOL_AUTO, dynamically generate
+ * both the key and the value; if not read from the
+ * appropriate pool.
+ */
+ if (hv_msg->kvp_hdr.pool != KVP_POOL_AUTO) {
+ kvp_pool_enumerate(hv_msg->kvp_hdr.pool,
+ hv_msg->body.kvp_enum_data.index,
+ hv_msg->body.kvp_enum_data.data.key,
+ HV_KVP_EXCHANGE_MAX_KEY_SIZE,
+ hv_msg->body.kvp_enum_data.data.value,
+ HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
+ goto kvp_done;
+ }
+
hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data;
key_name = (char *)hv_msg->body.kvp_enum_data.data.key;
key_value = (char *)hv_msg->body.kvp_enum_data.data.value;

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