static int _memlock_maps(struct cmd_context *cmd, lvmlock_t lock, size_t *mstats)
{
const struct dm_config_node *cn;
char *line, *line_end;
size_t len;
ssize_t n;
int ret = 1;
if (_use_mlockall) {
#ifdef MCL_CURRENT
if (lock == LVM_MLOCK) {
if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
log_sys_error("mlockall", "");
return 0;
}
} else {
if (munlockall()) {
log_sys_error("munlockall", "");
return 0;
}
}
return 1;
#else
return 0;
#endif
}
/* Reset statistic counters */
*mstats = 0;
/* read mapping into a single memory chunk without reallocation
* in the middle of reading maps file */
for (len = 0;;) {
if (!_maps_buffer || len >= _maps_len) {
if (_maps_buffer)
_maps_len *= 2;
if (!(line = dm_realloc(_maps_buffer, _maps_len))) {
log_error("Allocation of maps buffer failed.");
return 0;
}
_maps_buffer = line;
}
if (lseek(_maps_fd, 0, SEEK_SET))
log_sys_error("lseek", _procselfmaps);
for (len = 0 ; len < _maps_len; len += n) {
if (!(n = read(_maps_fd, _maps_buffer + len, _maps_len - len)))
break; /* EOF */
if (n == -1) {
log_sys_error("read", _procselfmaps);
return 0;
}
}
if (len < _maps_len) { /* fits in buffer */
_maps_buffer[len] = '\0';
break;
}
}
line = _maps_buffer;
cn = find_config_tree_array(cmd, activation_mlock_filter_CFG, NULL);
while ((line_end = strchr(line, '\n'))) {
*line_end = '\0'; /* remove \n */
if (!_maps_line(cn, lock, line, mstats))
ret = 0;
line = line_end + 1;
}
log_debug_mem("%socked %ld bytes",
(lock == LVM_MLOCK) ? "L" : "Unl", (long)*mstats);
return ret;
}
/*
* Formats data LV for a use as a VDO pool LV.
*
* Calls tool 'vdoformat' on the already active volume.
*/
static int _format_vdo_pool_data_lv(struct logical_volume *data_lv,
const struct dm_vdo_target_params *vtp,
uint64_t *logical_size)
{
char *dpath;
const struct dm_config_node *cn;
const struct dm_config_value *cv;
struct pipe_data pdata;
FILE *f;
uint64_t lb;
unsigned slabbits;
int args = 1;
char buf_args[5][128];
char buf[256]; /* buffer for short disk header (64B) */
const char *argv[19] = { /* Max supported args */
find_config_tree_str_allow_empty(data_lv->vg->cmd, global_vdo_format_executable_CFG, NULL)
};
if (!(dpath = lv_path_dup(data_lv->vg->cmd->mem, data_lv))) {
log_error("Failed to build device path for VDO formating of data volume %s.",
display_lvname(data_lv));
return 0;
}
if (*logical_size) {
if (dm_snprintf(buf_args[args], sizeof(buf_args[0]), "--logical-size=" FMTu64 "K",
(*logical_size / 2)) < 0)
return_0;
argv[args] = buf_args[args];
args++;
}
slabbits = 31 - clz(vtp->slab_size_mb / DM_VDO_BLOCK_SIZE * 512);
log_debug("Slab size %s converted to %u bits.",
display_size(data_lv->vg->cmd, vtp->slab_size_mb * UINT64_C(2 * 1024)), slabbits);
if (dm_snprintf(buf_args[args], sizeof(buf_args[0]), "--slab-bits=%u", slabbits) < 0)
return_0;
argv[args] = buf_args[args];
args++;
if (vtp->check_point_frequency) {
if (dm_snprintf(buf_args[args], sizeof(buf_args[0]), "--uds-checkpoint-frequency=%u",
vtp->check_point_frequency) < 0)
return_0;
argv[args] = buf_args[args];
args++;
}
/* Convert size to GiB units or one of these strings: 0.25, 0.50, 0.75 */
if (vtp->index_memory_size_mb >= 1024) {
if (dm_snprintf(buf_args[args], sizeof(buf_args[0]), "--uds-memory-size=%u",
vtp->index_memory_size_mb / 1024) < 0)
return_0;
} else if (dm_snprintf(buf_args[args], sizeof(buf_args[0]), "--uds-memory-size=0.%u",
(vtp->index_memory_size_mb < 512) ? 25 :
(vtp->index_memory_size_mb < 768) ? 50 : 75) < 0)
return_0;
argv[args] = buf_args[args];
args++;
if (vtp->use_sparse_index) {
if (dm_snprintf(buf_args[args], sizeof(buf_args[0]), "--uds-sparse") < 0)
return_0;
argv[args] = buf_args[args];
args++;
}
/* Any other user opts add here */
if (!(cn = find_config_tree_array(data_lv->vg->cmd, global_vdo_format_options_CFG, NULL))) {
log_error(INTERNAL_ERROR "Unable to find configuration for vdoformat command options.");
return 0;
}
for (cv = cn->v; cv && args < 16; cv = cv->next) {
if (cv->type != DM_CFG_STRING) {
log_error("Invalid string in config file: "
"global/vdoformat_options.");
return 0;
}
if (cv->v.str[0])
argv[++args] = cv->v.str;
}
/* Only unused VDO data LV could be activated and wiped */
if (!dm_list_empty(&data_lv->segs_using_this_lv)) {
log_error(INTERNAL_ERROR "Failed to wipe logical VDO data for volume %s.",
display_lvname(data_lv));
return 0;
}
argv[args] = dpath;
if (!(f = pipe_open(data_lv->vg->cmd, argv, 0, &pdata))) {
log_error("WARNING: Cannot read output from %s.", argv[0]);
return 0;
}
if (!*logical_size)
while (fgets(buf, sizeof(buf), f)) {
/* TODO: Watch out for locales */
if (sscanf(buf, "Logical blocks defaulted to " FMTu64 " blocks", &lb) == 1) {
*logical_size = lb * DM_VDO_BLOCK_SIZE;
log_verbose("Available VDO logical blocks " FMTu64 " (%s).",
lb, display_size(data_lv->vg->cmd, *logical_size));
break;
} else
log_warn("WARNING: Cannot parse output '%s' from %s.", buf, argv[0]);
}
if (!pipe_close(&pdata)) {
log_error("Command %s failed.", argv[0]);
return 0;
}
return 1;
}
