/*
* NOTES:
* - val_len is ignored for everything other than PT_BYTEBUF.
* - fromuser is ignored for numeric types
*/
inline int val_to_ring(struct event_filler_arguments *args, uint64_t val, u16 val_len, bool fromuser)
{
int len = -1;
u16 *psize = (u16 *)(args->buffer + args->curarg * sizeof(u16));
if (unlikely(args->curarg >= args->nargs)) {
pr_info("(%u)val_to_ring: too many arguments for event #%u, type=%u, curarg=%u, nargs=%u tid:%u\n",
smp_processor_id(),
args->nevents,
(u32)args->event_type,
args->curarg,
args->nargs,
current->pid);
memory_dump(args->buffer - sizeof(struct ppm_evt_hdr), 32);
ASSERT(0);
return PPM_FAILURE_BUG;
}
switch (g_event_info[args->event_type].params[args->curarg].type) {
case PT_CHARBUF:
case PT_FSPATH:
if (likely(val != 0)) {
if (fromuser) {
len = ppm_strncpy_from_user(args->buffer + args->arg_data_offset,
(const char __user *)(unsigned long)val, args->arg_data_size);
if (unlikely(len < 0))
return PPM_FAILURE_INVALID_USER_MEMORY;
} else {
char *dest = strncpy(args->buffer + args->arg_data_offset,
(const char *)(unsigned long)val,
args->arg_data_size);
dest[args->arg_data_size - 1] = 0;
len = strlen(dest) + 1;
}
/*
* Make sure the string is null-terminated
*/
*(char *)(args->buffer + args->arg_data_offset + len) = 0;
} else {
/*
* Handle NULL pointers
*/
char *dest = strncpy(args->buffer + args->arg_data_offset,
"(NULL)",
args->arg_data_size);
dest[args->arg_data_size - 1] = 0;
len = strlen(dest) + 1;
}
break;
case PT_BYTEBUF:
case PT_SOCKADDR:
case PT_SOCKTUPLE:
case PT_FDLIST:
if (likely(val != 0)) {
if (unlikely(val_len >= args->arg_data_size)) {
return PPM_FAILURE_BUFFER_FULL;
} else {
if (fromuser) {
len = (int)ppm_copy_from_user(args->buffer + args->arg_data_offset,
(const void __user *)(unsigned long)val,
val_len);
if (unlikely(len != 0))
return PPM_FAILURE_INVALID_USER_MEMORY;
len = val_len;
} else {
memcpy(args->buffer + args->arg_data_offset,
(void *)(unsigned long)val, val_len);
len = val_len;
}
}
} else {
/*
* Handle NULL pointers
*/
len = 0;
}
break;
case PT_FLAGS8:
case PT_UINT8:
case PT_SIGTYPE:
if (likely(args->arg_data_size >= sizeof(u8))) {
*(u8 *)(args->buffer + args->arg_data_offset) = (u8)val;
len = sizeof(u8);
} else {
return PPM_FAILURE_BUFFER_FULL;
}
break;
case PT_FLAGS16:
case PT_UINT16:
case PT_SYSCALLID:
if (likely(args->arg_data_size >= sizeof(u16))) {
*(u16 *)(args->buffer + args->arg_data_offset) = (u16)val;
len = sizeof(u16);
} else {
return PPM_FAILURE_BUFFER_FULL;
}
break;
case PT_FLAGS32:
case PT_UINT32:
if (likely(args->arg_data_size >= sizeof(u32))) {
*(u32 *)(args->buffer + args->arg_data_offset) = (u32)val;
len = sizeof(u32);
} else {
return PPM_FAILURE_BUFFER_FULL;
}
break;
case PT_RELTIME:
case PT_ABSTIME:
case PT_UINT64:
if (likely(args->arg_data_size >= sizeof(u64))) {
*(u64 *)(args->buffer + args->arg_data_offset) = (u64)val;
len = sizeof(u64);
} else {
return PPM_FAILURE_BUFFER_FULL;
}
break;
case PT_INT8:
if (likely(args->arg_data_size >= sizeof(s8))) {
*(s8 *)(args->buffer + args->arg_data_offset) = (s8)(long)val;
len = sizeof(s8);
} else {
return PPM_FAILURE_BUFFER_FULL;
}
break;
case PT_INT16:
if (likely(args->arg_data_size >= sizeof(s16))) {
*(s16 *)(args->buffer + args->arg_data_offset) = (s16)(long)val;
len = sizeof(s16);
} else {
return PPM_FAILURE_BUFFER_FULL;
}
break;
case PT_INT32:
if (likely(args->arg_data_size >= sizeof(s32))) {
*(s32 *)(args->buffer + args->arg_data_offset) = (s32)(long)val;
len = sizeof(s32);
} else {
return PPM_FAILURE_BUFFER_FULL;
}
break;
case PT_INT64:
case PT_ERRNO:
case PT_FD:
case PT_PID:
if (likely(args->arg_data_size >= sizeof(s64))) {
*(s64 *)(args->buffer + args->arg_data_offset) = (s64)(long)val;
len = sizeof(s64);
} else {
return PPM_FAILURE_BUFFER_FULL;
}
break;
default:
ASSERT(0);
pr_info("val_to_ring: invalid argument type %d. Event %u (%s) might have less parameters than what has been declared in nparams\n",
(int)g_event_info[args->event_type].params[args->curarg].type,
(u32)args->event_type,
g_event_info[args->event_type].name);
return PPM_FAILURE_BUG;
}
ASSERT(len <= 65535);
ASSERT(len <= args->arg_data_size);
*psize = (u16)len;
args->curarg++;
args->arg_data_offset += len;
args->arg_data_size -= len;
return PPM_SUCCESS;
}
/*
* NOTES:
* - val_len is ignored for everything other than PT_BYTEBUF.
* - fromuser is ignored for numeric types
* - dyn_idx is ignored for everything other than PT_DYN
*/
int val_to_ring(struct event_filler_arguments *args, uint64_t val, u16 val_len, bool fromuser, u8 dyn_idx)
{
const struct ppm_param_info *param_info;
int len = -1;
u16 *psize = (u16 *)(args->buffer + args->curarg * sizeof(u16));
if (unlikely(args->curarg >= args->nargs)) {
pr_err("(%u)val_to_ring: too many arguments for event #%u, type=%u, curarg=%u, nargs=%u tid:%u\n",
smp_processor_id(),
args->nevents,
(u32)args->event_type,
args->curarg,
args->nargs,
current->pid);
memory_dump(args->buffer - sizeof(struct ppm_evt_hdr), 32);
ASSERT(0);
return PPM_FAILURE_BUG;
}
if (unlikely(args->arg_data_size == 0))
return PPM_FAILURE_BUFFER_FULL;
param_info = &(g_event_info[args->event_type].params[args->curarg]);
if (param_info->type == PT_DYN && param_info->info != NULL) {
const struct ppm_param_info *dyn_params;
if (unlikely(dyn_idx >= param_info->ninfo)) {
ASSERT(0);
return PPM_FAILURE_BUG;
}
dyn_params = (const struct ppm_param_info *)param_info->info;
param_info = &dyn_params[dyn_idx];
if (likely(args->arg_data_size >= sizeof(u8))) {
*(u8 *)(args->buffer + args->arg_data_offset) = dyn_idx;
len = sizeof(u8);
} else {
return PPM_FAILURE_BUFFER_FULL;
}
args->arg_data_offset += len;
args->arg_data_size -= len;
*psize = (u16)len;
} else {
*psize = 0;
}
switch (param_info->type) {
case PT_CHARBUF:
case PT_FSPATH:
if (likely(val != 0)) {
if (fromuser) {
len = ppm_strncpy_from_user(args->buffer + args->arg_data_offset,
(const char __user *)(unsigned long)val, args->arg_data_size);
if (unlikely(len < 0))
return PPM_FAILURE_INVALID_USER_MEMORY;
} else {
len = strlcpy(args->buffer + args->arg_data_offset,
(const char *)(unsigned long)val,
args->arg_data_size);
if (++len > args->arg_data_size)
len = args->arg_data_size;
}
/*
* Make sure the string is null-terminated
*/
*(char *)(args->buffer + args->arg_data_offset + len) = 0;
} else {
/*
* Handle NULL pointers
*/
len = strlcpy(args->buffer + args->arg_data_offset,
"(NULL)",
args->arg_data_size);
if (++len > args->arg_data_size)
len = args->arg_data_size;
}
break;
case PT_BYTEBUF:
if (likely(val != 0)) {
if (fromuser) {
/*
* Copy the lookahead portion of the buffer that we will use DPI-based
* snaplen calculation
*/
u32 dpi_lookahead_size = DPI_LOOKAHED_SIZE;
if (dpi_lookahead_size > val_len)
dpi_lookahead_size = val_len;
if (unlikely(dpi_lookahead_size >= args->arg_data_size))
return PPM_FAILURE_BUFFER_FULL;
len = (int)ppm_copy_from_user(args->buffer + args->arg_data_offset,
(const void __user *)(unsigned long)val,
dpi_lookahead_size);
if (unlikely(len != 0))
return PPM_FAILURE_INVALID_USER_MEMORY;
/*
* Check if there's more to copy
*/
if (likely((dpi_lookahead_size != val_len))) {
/*
* Calculate the snaplen
*/
if (likely(args->enforce_snaplen)) {
u32 sl = args->consumer->snaplen;
sl = compute_snaplen(args, args->buffer + args->arg_data_offset, dpi_lookahead_size);
if (val_len > sl)
val_len = sl;
}
if (unlikely((val_len) >= args->arg_data_size))
val_len = args->arg_data_size;
if (val_len > dpi_lookahead_size) {
len = (int)ppm_copy_from_user(args->buffer + args->arg_data_offset + dpi_lookahead_size,
(const void __user *)(unsigned long)val + dpi_lookahead_size,
val_len - dpi_lookahead_size);
if (unlikely(len != 0))
return PPM_FAILURE_INVALID_USER_MEMORY;
}
}
len = val_len;
} else {
if (likely(args->enforce_snaplen)) {
u32 sl = compute_snaplen(args, (char *)(unsigned long)val, val_len);
if (val_len > sl)
val_len = sl;
}
if (unlikely(val_len >= args->arg_data_size))
return PPM_FAILURE_BUFFER_FULL;
memcpy(args->buffer + args->arg_data_offset,
(void *)(unsigned long)val, val_len);
len = val_len;
}
} else {
/*
* Handle NULL pointers
*/
len = 0;
}
break;
case PT_SOCKADDR:
case PT_SOCKTUPLE:
case PT_FDLIST:
if (likely(val != 0)) {
if (unlikely(val_len >= args->arg_data_size))
return PPM_FAILURE_BUFFER_FULL;
if (fromuser) {
len = (int)ppm_copy_from_user(args->buffer + args->arg_data_offset,
(const void __user *)(unsigned long)val,
val_len);
if (unlikely(len != 0))
return PPM_FAILURE_INVALID_USER_MEMORY;
len = val_len;
} else {
memcpy(args->buffer + args->arg_data_offset,
(void *)(unsigned long)val, val_len);
len = val_len;
}
} else {
/*
* Handle NULL pointers
*/
len = 0;
}
break;
case PT_FLAGS8:
case PT_UINT8:
case PT_SIGTYPE:
if (likely(args->arg_data_size >= sizeof(u8))) {
*(u8 *)(args->buffer + args->arg_data_offset) = (u8)val;
len = sizeof(u8);
} else {
return PPM_FAILURE_BUFFER_FULL;
}
break;
case PT_FLAGS16:
case PT_UINT16:
case PT_SYSCALLID:
if (likely(args->arg_data_size >= sizeof(u16))) {
*(u16 *)(args->buffer + args->arg_data_offset) = (u16)val;
len = sizeof(u16);
} else {
return PPM_FAILURE_BUFFER_FULL;
}
break;
case PT_FLAGS32:
case PT_UINT32:
case PT_UID:
case PT_GID:
case PT_SIGSET:
if (likely(args->arg_data_size >= sizeof(u32))) {
*(u32 *)(args->buffer + args->arg_data_offset) = (u32)val;
len = sizeof(u32);
} else {
return PPM_FAILURE_BUFFER_FULL;
}
break;
case PT_RELTIME:
case PT_ABSTIME:
case PT_UINT64:
if (likely(args->arg_data_size >= sizeof(u64))) {
*(u64 *)(args->buffer + args->arg_data_offset) = (u64)val;
len = sizeof(u64);
} else {
return PPM_FAILURE_BUFFER_FULL;
}
break;
case PT_INT8:
if (likely(args->arg_data_size >= sizeof(s8))) {
*(s8 *)(args->buffer + args->arg_data_offset) = (s8)(long)val;
len = sizeof(s8);
} else {
return PPM_FAILURE_BUFFER_FULL;
}
break;
case PT_INT16:
if (likely(args->arg_data_size >= sizeof(s16))) {
*(s16 *)(args->buffer + args->arg_data_offset) = (s16)(long)val;
len = sizeof(s16);
} else {
return PPM_FAILURE_BUFFER_FULL;
}
break;
case PT_INT32:
if (likely(args->arg_data_size >= sizeof(s32))) {
*(s32 *)(args->buffer + args->arg_data_offset) = (s32)(long)val;
len = sizeof(s32);
} else {
return PPM_FAILURE_BUFFER_FULL;
}
break;
case PT_INT64:
case PT_ERRNO:
case PT_FD:
case PT_PID:
if (likely(args->arg_data_size >= sizeof(s64))) {
*(s64 *)(args->buffer + args->arg_data_offset) = (s64)(long)val;
len = sizeof(s64);
} else {
return PPM_FAILURE_BUFFER_FULL;
}
break;
default:
ASSERT(0);
pr_err("val_to_ring: invalid argument type %d. Event %u (%s) might have less parameters than what has been declared in nparams\n",
(int)g_event_info[args->event_type].params[args->curarg].type,
(u32)args->event_type,
g_event_info[args->event_type].name);
return PPM_FAILURE_BUG;
}
ASSERT(len <= 65535);
ASSERT(len <= args->arg_data_size);
*psize += (u16)len;
args->curarg++;
args->arg_data_offset += len;
args->arg_data_size -= len;
return PPM_SUCCESS;
}
