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castle_ioctl.c
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castle_ioctl.c
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#include <sys/ioctl.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <inttypes.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <linux/fs.h>
#include "castle.h"
#include "castle_public.h"
#include "castle_private.h"
/* Define string array for userspace error-codes. */
#undef CASTLE_ERROR_CODE
#define CASTLE_ERROR_CODE(err_no, err_code, err_str) [err_no] = err_str,
const char *castle_error_strings[CASTLE_ERROR_MAX+1] =
{
CASTLE_ERRORS
};
const char * castle_error_code_to_str(int error_code)
{
if ((error_code < 0) || (error_code >= CASTLE_ERROR_MAX))
error_code = CASTLE_ERROR_MAX;
return castle_error_strings[error_code];
}
int castle_protocol_version(struct castle_front_connection *conn) {
struct castle_control_ioctl ctl;
int ret;
ctl.cmd = CASTLE_CTRL_PROTOCOL_VERSION;
ret = ioctl(conn->fd, CASTLE_CTRL_PROTOCOL_VERSION_IOCTL, &ctl);
if (__builtin_expect(conn->debug_log != NULL, 0)) {
fprintf(conn->debug_log, "protocol_version() = %d, %d\n", ret, ctl.protocol_version.version);
fflush(conn->debug_log);
}
if (ret)
return -1;
return ctl.protocol_version.version;
}
int castle_merge_start(struct castle_front_connection *conn, c_merge_cfg_t merge_cfg,
c_merge_id_t *merge_id)
{
struct castle_control_ioctl ctl;
int ret;
ctl.cmd = CASTLE_CTRL_MERGE_START;
ctl.merge_start.merge_cfg = merge_cfg;
ret = ioctl(conn->fd, CASTLE_CTRL_MERGE_START_IOCTL, &ctl);
if (__builtin_expect(conn->debug_log != NULL, 0))
{
unsigned int i;
fprintf(conn->debug_log, "merge_start(nr_arrays = %u, arrays = ",
merge_cfg.nr_arrays);
for (i=0; i<merge_cfg.nr_arrays; i++)
fprintf(conn->debug_log, "[0x%lx]", merge_cfg.arrays[i]);
for (i=0; i<merge_cfg.nr_data_exts; i++)
fprintf(conn->debug_log, "[0x%lx]", merge_cfg.data_exts[i]);
fprintf(conn->debug_log, ", metadata_ext_type = %u, met_ext_type = %u\n",
merge_cfg.metadata_ext_type,
merge_cfg.data_ext_type);
fflush(conn->debug_log);
}
if (ret) return ret;
*merge_id = ctl.merge_start.merge_id;
return ctl.merge_start.ret;
}
#define C_PRINTF_uint8 "%u"
#define C_PRINTF_uint32 "%u"
#define C_PRINTF_uint64 "%lu"
#define C_PRINTF_slave_uuid "%u"
#define C_PRINTF_version "%u"
#define C_PRINTF_size "%zu"
#define C_PRINTF_string "%s"
#define C_PRINTF_collection_id "%u"
#define C_PRINTF_env_var "%u"
#define C_PRINTF_int "%d"
#define C_PRINTF_int32 "%d"
#define C_PRINTF_da_id_t "%d"
#define C_PRINTF_merge_id_t "%d"
#define C_PRINTF_thread_id_t "%d"
#define C_PRINTF_work_id_t "%d"
#define C_PRINTF_work_size_t "%lu"
#define C_PRINTF_pid "%u"
#define C_PRINTF_c_da_opts_t "%lu"
#define C_PRINTF_c_state_t "%d"
#define CASTLE_IOCTL_0IN_0OUT(_id, _name) \
int castle_##_id (struct castle_front_connection *conn) \
{ \
struct castle_control_ioctl ctl; \
int ret; \
ctl.cmd = _name; \
\
ret = ioctl(conn->fd, _name##_IOCTL, &ctl); \
if (__builtin_expect(conn->debug_log != NULL, 0)) { \
fprintf(conn->debug_log, #_id "() = %d\n", ret); \
fflush(conn->debug_log); \
} \
if (ret) \
return errno; \
\
return ctl._id.ret; \
}
#define CASTLE_IOCTL_1IN_0OUT(_id, _name, _arg_1_t, _arg_1) \
int castle_##_id (struct castle_front_connection *conn, \
C_TYPE_##_arg_1_t _arg_1) \
{ \
struct castle_control_ioctl ctl; \
int ret; \
ctl.cmd = _name; \
ctl._id._arg_1 = _arg_1; \
\
ret = ioctl(conn->fd, _name##_IOCTL, &ctl); \
if (__builtin_expect(conn->debug_log != NULL, 0)) { \
fprintf(conn->debug_log, \
#_id "(" #_arg_1 " = " C_PRINTF_##_arg_1_t ") = %d\n", \
_arg_1, ret); \
fflush(conn->debug_log); \
} \
if (ret) \
return errno; \
\
return ctl._id.ret; \
}
#define CASTLE_IOCTL_0IN_1OUT(_id, _name, _ret_1_t, _ret) \
int castle_##_id (struct castle_front_connection *conn, \
C_TYPE_##_ret_1_t * _ret##_out) \
{ \
struct castle_control_ioctl ctl; \
int ret; \
ctl.cmd = _name; \
\
ret = ioctl(conn->fd, _name##_IOCTL, &ctl); \
if (__builtin_expect(conn->debug_log != NULL, 0)) { \
fprintf(conn->debug_log, #_id "(" #_ret " = " C_PRINTF_##_ret_1_t ") = %d\n", \
ctl._id.ret, ret); \
fflush(conn->debug_log); \
} \
if (ret) \
return errno; \
\
* _ret##_out = ctl._id._ret; \
\
return ctl._id.ret; \
} \
#define CASTLE_IOCTL_1IN_1OUT(_id, _name, _arg_1_t, _arg_1, _ret_1_t, _ret) \
int castle_##_id (struct castle_front_connection *conn, \
C_TYPE_##_arg_1_t _arg_1, \
C_TYPE_##_ret_1_t * _ret##_out) \
{ \
struct castle_control_ioctl ctl; \
int ret; \
ctl.cmd = _name; \
ctl._id._arg_1 = _arg_1; \
\
ret = ioctl(conn->fd, _name##_IOCTL, &ctl); \
if (__builtin_expect(conn->debug_log != NULL, 0)) { \
fprintf(conn->debug_log, #_id "(" #_arg_1 " = " C_PRINTF_##_arg_1_t \
", " #_ret " = " C_PRINTF_##_ret_1_t ") = %d\n", _arg_1, ctl._id.ret, ret); \
fflush(conn->debug_log); \
} \
if (ret) \
return errno; \
\
* _ret##_out = ctl._id._ret; \
\
return ctl._id.ret; \
} \
#define CASTLE_IOCTL_2IN_0OUT(_id, _name, _arg_1_t, _arg_1, _arg_2_t, _arg_2) \
int castle_##_id (struct castle_front_connection *conn, \
C_TYPE_##_arg_1_t _arg_1, C_TYPE_##_arg_2_t _arg_2) \
{ \
struct castle_control_ioctl ctl; \
int ret; \
ctl.cmd = _name; \
ctl._id._arg_1 = _arg_1; \
ctl._id._arg_2 = _arg_2; \
\
ret = ioctl(conn->fd, _name##_IOCTL, &ctl); \
if (__builtin_expect(conn->debug_log != NULL, 0)) { \
fprintf(conn->debug_log, \
#_id "(" #_arg_1 " = " C_PRINTF_##_arg_1_t \
", " #_arg_2 " = " C_PRINTF_##_arg_2_t ") = %d\n", \
_arg_1, _arg_2, ret); \
fflush(conn->debug_log); \
} \
if (ret) \
return errno; \
\
return ctl._id.ret; \
}
#define CASTLE_IOCTL_2IN_1OUT(_id, _name, _arg_1_t, _arg_1, _arg_2_t, _arg_2, \
_ret_1_t, _ret) \
int castle_##_id (struct castle_front_connection *conn, \
C_TYPE_##_arg_1_t _arg_1, C_TYPE_##_arg_2_t _arg_2, C_TYPE_##_ret_1_t * _ret##_out) \
{ \
struct castle_control_ioctl ctl; \
int ret; \
ctl.cmd = _name; \
ctl._id._arg_1 = _arg_1; \
ctl._id._arg_2 = _arg_2; \
\
ret = ioctl(conn->fd, _name##_IOCTL, &ctl); \
if (__builtin_expect(conn->debug_log != NULL, 0)) { \
fprintf(conn->debug_log, \
#_id "(" #_arg_1 " = " C_PRINTF_##_arg_1_t \
", " #_arg_2 " = " C_PRINTF_##_arg_2_t \
", " #_ret " = " C_PRINTF_##_ret_1_t ") = %d\n", \
_arg_1, _arg_2, ctl._id.ret, ret); \
fflush(conn->debug_log); \
} \
if (ret) \
return errno; \
\
* _ret##_out = ctl._id._ret; \
\
return ctl._id.ret; \
}
#define CASTLE_IOCTL_3IN_1OUT(_id, _name, _arg_1_t, _arg_1, _arg_2_t, _arg_2, \
_arg_3_t, _arg_3, _ret_1_t, _ret) \
int castle_##_id (struct castle_front_connection *conn, \
C_TYPE_##_arg_1_t _arg_1, \
C_TYPE_##_arg_2_t _arg_2, \
C_TYPE_##_arg_3_t _arg_3, \
C_TYPE_##_ret_1_t * _ret##_out) \
{ \
struct castle_control_ioctl ctl; \
int ret; \
\
ctl.cmd = _name; \
ctl._id._arg_1 = _arg_1; \
ctl._id._arg_2 = _arg_2; \
ctl._id._arg_3 = _arg_3; \
\
ret = ioctl(conn->fd, _name##_IOCTL, &ctl); \
if (__builtin_expect(conn->debug_log != NULL, 0)) { \
fprintf(conn->debug_log, #_id "(" #_arg_1 " = " C_PRINTF_##_arg_1_t \
", " #_arg_2 " = " C_PRINTF_##_arg_2_t \
", " #_arg_3 " = " C_PRINTF_##_arg_3_t \
", " #_ret " = " C_PRINTF_##_ret_1_t ") = %d\n", \
_arg_1, _arg_2, _arg_3, ctl._id.ret, ret); \
fflush(conn->debug_log); \
} \
if (ret) \
return errno; \
\
* _ret##_out = ctl._id._ret; \
\
return ctl._id.ret; \
}
CASTLE_IOCTLS
PRIVATE_CASTLE_IOCTLS
/*************************************************************************************************/
/* A thin wrapper executable to issue Castle ioctls. */
#define CASTLE_IOCTLS_EXE_DEBUG
#define STR_TO_CTYPE_version(_v) atol(_v)
#define STR_TO_CTYPE_string(_v) (_v)
#define STR_TO_CTYPE_size(_v) atol(_v)
//#define RET_STR_FMT ("%lld")
//#define RET_STR_FMT ("0x%x")
#define RET_STR_FMT ("0x%x\n")
static int parse_args(int argc, char *argv[], char **cmd, char **str_args[])
{
int i;
*cmd = argv[1]; //TODO append a castle_ prefix so the user does not have to specify it?
for (i=2; i<argc; i++)
(*str_args)[i-2]=argv[i];
if (argc>2)
return argc-2;
return 0;
}
int main(int argc, char *argv[])
{
int i;
int arg_count;
char *cmd = NULL;
char **str_args = NULL;
castle_connection *conn;
int err = 0;
if ((err = castle_connect(&conn)))
{
fprintf(stderr, "castle_connect failed with error code %d (is Castle running?)\n", err);
return err; /* After this there can be no returns until the out label! */
}
if (argc < 2)
{
fprintf(stderr, "Insufficient number of arguments (%d).\n", argc);
err = -EINVAL;
goto out;
}
if (argc > 2)
{
str_args = malloc(sizeof(char *) * (argc-2));
if (!str_args)
{
fprintf(stderr, "Failed to malloc for argument parseing.\n");
err = -ENOMEM;
goto out;
}
}
arg_count = parse_args(argc, argv, &cmd, &str_args);
#ifdef CASTLE_IOCTLS_EXE_DEBUG
fprintf(stderr, "argc: %d\n", argc);
for(i=0; i<argc; i++)
fprintf(stderr, "argv[%d]=%s\n", i, argv[i]);
fprintf(stderr, "cmd: %s, arg_count: %d\n", cmd, arg_count);
for(i=0; i<arg_count; i++)
fprintf(stderr, "arg %d: %s\n", i, str_args[i]);
fprintf(stderr, "Preparing to issue ioctl...\n");
#endif
// TODO: FUNKY MACRO MAGIC HERE? Mileage may vary...
if (0) {}
else if (!strcmp(cmd, "collection_attach"))
{
int _i = 0;
int req_arg_count = 2;
C_TYPE_version arg1;
C_TYPE_string arg2;
//C_TYPE_size arg3 = STR_TO_CTYPE_size(str_args[_i++]);
C_TYPE_collection_id ret;
if (arg_count != req_arg_count)
{
fprintf(stderr, "Command %s requires %d arguments (got %d).\n", cmd, req_arg_count, arg_count);
err = -EINVAL;
goto out;
}
arg1 = STR_TO_CTYPE_version(str_args[_i++]);
arg2 = STR_TO_CTYPE_string(str_args[_i++]);
//C_TYPE_size arg3 = STR_TO_CTYPE_size(str_args[_i++]);
#ifdef CASTLE_IOCTLS_EXE_DEBUG
fprintf(stderr, "running %s\n", cmd);
#endif
if ((err = castle_collection_attach(conn, arg1, arg2, strlen(arg2)+1, &ret)))
{
fprintf(stderr, "Command %s failed with error code %d.\n", cmd, err);
goto out;
}
printf(RET_STR_FMT, ret);
goto out;
}
fprintf(stderr, "Command %s not recognized.\n", cmd);
err = -EINVAL;
out:
castle_disconnect(conn);
return err;
}