You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
216 lines
6.5 KiB
216 lines
6.5 KiB
#pragma 78once
|
|
|
|
#include <string.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/types.h>
|
|
#include <netdb.h>
|
|
|
|
#include "admissions_control.h"
|
|
#include "admissions_info.h"
|
|
#include "http.h"
|
|
#include "panic.h"
|
|
#include "types.h"
|
|
|
|
/* Wasm initialization functions generated by the compiler */
|
|
#define MODULE_INITIALIZE_GLOBALS "populate_globals"
|
|
#define MODULE_INITIALIZE_MEMORY "populate_memory"
|
|
#define MODULE_INITIALIZE_TABLE "populate_table"
|
|
#define MODULE_INITIALIZE_LIBC "wasmf___init_libc"
|
|
#define MODULE_MAIN "wasmf_main"
|
|
|
|
#define MODULE_DEFAULT_REQUEST_RESPONSE_SIZE (PAGE_SIZE)
|
|
|
|
|
|
#define MODULE_MAX_ARGUMENT_COUNT 16
|
|
#define MODULE_MAX_ARGUMENT_SIZE 64
|
|
#define MODULE_MAX_NAME_LENGTH 32
|
|
#define MODULE_MAX_PATH_LENGTH 256
|
|
|
|
/*
|
|
* Defines the listen backlog, the queue length for completely established socketeds waiting to be accepted
|
|
* If this value is greater than the value in /proc/sys/net/core/somaxconn (typically 128), then it is silently
|
|
* truncated to this value. See man listen(2) for info
|
|
*
|
|
* When configuring the number of sockets to handle, the queue length of incomplete sockets defined in
|
|
* /proc/sys/net/ipv4/tcp_max_syn_backlog should also be considered. Optionally, enabling syncookies removes this
|
|
* maximum logical length. See tcp(7) for more info.
|
|
*/
|
|
#define MODULE_MAX_PENDING_CLIENT_REQUESTS 128
|
|
#if MODULE_MAX_PENDING_CLIENT_REQUESTS > 128
|
|
#warning \
|
|
"MODULE_MAX_PENDING_CLIENT_REQUESTS likely exceeds the value in /proc/sys/net/core/somaxconn and thus may be silently truncated";
|
|
#endif
|
|
|
|
struct module {
|
|
char name[MODULE_MAX_NAME_LENGTH];
|
|
char path[MODULE_MAX_PATH_LENGTH];
|
|
void * dynamic_library_handle; /* Handle to the *.so of the serverless function */
|
|
int32_t argument_count;
|
|
uint32_t stack_size; /* a specification? */
|
|
uint64_t max_memory; /* perhaps a specification of the module. (max 4GB) */
|
|
uint32_t relative_deadline_us;
|
|
uint64_t relative_deadline; /* cycles */
|
|
_Atomic uint32_t reference_count; /* ref count how many instances exist here. */
|
|
struct indirect_table_entry indirect_table[INDIRECT_TABLE_SIZE];
|
|
struct sockaddr_in socket_address;
|
|
int socket_descriptor;
|
|
struct admissions_info admissions_info;
|
|
int port;
|
|
|
|
unsigned long max_request_size;
|
|
char request_headers[HTTP_MAX_HEADER_COUNT][HTTP_MAX_HEADER_LENGTH];
|
|
int request_header_count;
|
|
char request_content_type[HTTP_MAX_HEADER_VALUE_LENGTH];
|
|
|
|
/* resp size including headers! */
|
|
unsigned long max_response_size;
|
|
int response_header_count;
|
|
char response_content_type[HTTP_MAX_HEADER_VALUE_LENGTH];
|
|
char response_headers[HTTP_MAX_HEADER_COUNT][HTTP_MAX_HEADER_LENGTH];
|
|
|
|
/* Equals the largest of either max_request_size or max_response_size */
|
|
unsigned long max_request_or_response_size;
|
|
|
|
/* Functions to initialize aspects of sandbox */
|
|
mod_glb_fn_t initialize_globals;
|
|
mod_mem_fn_t initialize_memory;
|
|
mod_tbl_fn_t initialize_tables;
|
|
mod_libc_fn_t initialize_libc;
|
|
|
|
/* Entry Function to invoke serverless function */
|
|
mod_main_fn_t main;
|
|
|
|
//struct module *next_module; /* the next module in the chain */
|
|
|
|
/* the left and right children module in the tree */
|
|
struct module *left_module;
|
|
struct module *right_module;
|
|
/* parent moudle or not?*/
|
|
bool *is_parent;
|
|
|
|
};
|
|
|
|
/*************************
|
|
* Public Static Inlines *
|
|
************************/
|
|
|
|
/**
|
|
* Increment a modules reference count
|
|
* @param module
|
|
*/
|
|
static inline void
|
|
module_acquire(struct module *module)
|
|
{
|
|
assert(module->reference_count < UINT32_MAX);
|
|
atomic_fetch_add(&module->reference_count, 1);
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Get a module's argument count
|
|
* @param module
|
|
* @returns the number of arguments
|
|
*/
|
|
static inline int32_t
|
|
module_get_argument_count(struct module *module)
|
|
{
|
|
return module->argument_count;
|
|
}
|
|
|
|
/**
|
|
* Invoke a module's initialize_globals
|
|
* @param module
|
|
*/
|
|
static inline void
|
|
module_initialize_globals(struct module *module)
|
|
{
|
|
/* called in a sandbox. */
|
|
module->initialize_globals();
|
|
}
|
|
|
|
/**
|
|
* Invoke a module's initialize_tables
|
|
* @param module
|
|
*/
|
|
static inline void
|
|
module_initialize_table(struct module *module)
|
|
{
|
|
/* called at module creation time (once only per module). */
|
|
module->initialize_tables();
|
|
}
|
|
|
|
/**
|
|
* Invoke a module's initialize_libc
|
|
* @param module - module whose libc we are initializing
|
|
* @param env - address?
|
|
* @param arguments - address?
|
|
*/
|
|
static inline void
|
|
module_initialize_libc(struct module *module, int32_t env, int32_t arguments)
|
|
{
|
|
/* called in a sandbox. */
|
|
module->initialize_libc(env, arguments);
|
|
}
|
|
|
|
/**
|
|
* Invoke a module's initialize_memory
|
|
* @param module - the module whose memory we are initializing
|
|
*/
|
|
static inline void
|
|
module_initialize_memory(struct module *module)
|
|
{
|
|
// called in a sandbox.
|
|
module->initialize_memory();
|
|
}
|
|
|
|
/**
|
|
* Validate module, defined as having a non-NULL dynamical library handle and entry function pointer
|
|
* @param module - module to validate
|
|
*/
|
|
static inline void
|
|
module_validate(struct module *module)
|
|
{
|
|
if (!module) {
|
|
panic("module %p | module is unexpectedly NULL\n", module);
|
|
} else if (!module->dynamic_library_handle) {
|
|
panic("module %p | module->dynamic_library_handle is unexpectedly NULL\n", module);
|
|
} else if (!module->main) {
|
|
panic("module %p | module->main is unexpectedly NULL\n", module);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Invoke a module's entry function, forwarding on argc and argv
|
|
* @param module
|
|
* @param argc standard UNIX count of arguments
|
|
* @param argv standard UNIX vector of arguments
|
|
* @return return code of module's main function
|
|
*/
|
|
static inline int32_t
|
|
module_main(struct module *module, int32_t argc, int32_t argv)
|
|
{
|
|
return module->main(argc, argv);
|
|
}
|
|
|
|
/**
|
|
* Decrement a modules reference count
|
|
* @param module
|
|
*/
|
|
static inline void
|
|
module_release(struct module *module)
|
|
{
|
|
assert(module->reference_count > 0);
|
|
atomic_fetch_sub(&module->reference_count, 1);
|
|
return;
|
|
}
|
|
|
|
/********************************
|
|
* Public Methods from module.c *
|
|
*******************************/
|
|
|
|
void module_free(struct module *module);
|
|
struct module *module_new(char *mod_name, char *mod_path, int32_t argument_count, uint32_t stack_sz, uint32_t max_heap,
|
|
uint32_t relative_deadline_us, int port, int req_sz, int resp_sz, int admissions_percentile,
|
|
uint32_t expected_execution_us);
|
|
int module_new_from_json(char *filename);
|