mirror of
git://sourceware.org/git/lvm2.git
synced 2024-12-21 13:34:40 +03:00
writecache: handle options from lvm.conf
User can place default settings into lvm.conf i.e.:
allocation {
cache_settings {
writecache {
block_size = 4096
}
}
}
This commit is contained in:
Zdenek Kabelac
parent
8f50c5e79b
commit
c6639056e0
@ -1,5 +1,6 @@
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Version 2.03.15 -
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===================================
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Improve support for metadata profiles for --type writecache.
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Use cache or active DM device when available with new kernels.
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Introduce function to utilize UUIDs from DM_DEVICE_LIST.
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Increase some hash table size to better support large device sets.
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314
tools/toollib.c
314
tools/toollib.c
@ -1196,159 +1196,123 @@ out:
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return ok;
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}
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static int _get_one_writecache_setting(struct cmd_context *cmd, struct writecache_settings *settings,
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char *key, char *val, uint32_t *block_size_sectors)
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static int _get_writecache_setting(struct cmd_context *cmd,
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struct dm_config_node *cn,
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struct writecache_settings *settings,
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uint32_t *block_size_sectors)
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{
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/* special case: block_size is not a setting but is set with the --cachesettings option */
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if (!strncmp(key, "block_size", strlen("block_size"))) {
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uint32_t block_size = 0;
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if (sscanf(val, "%u", &block_size) != 1)
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goto_bad;
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if (block_size == 512)
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*block_size_sectors = 1;
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else if (block_size == 4096)
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*block_size_sectors = 8;
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else
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goto_bad;
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return 1;
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}
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char val[32];
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if (!strncmp(key, "high_watermark", strlen("high_watermark"))) {
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if (sscanf(val, "%llu", (unsigned long long *)&settings->high_watermark) != 1)
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goto_bad;
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if (settings->high_watermark > 100)
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goto_bad;
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settings->high_watermark_set = 1;
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return 1;
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}
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/* Try to find our section for given policy */
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for (; cn; cn = cn->sib) {
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/* special case: block_size is not a setting but is set with the --cachesettings option */
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if (!strcmp(cn->key, "block_size")) {
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if (cn->v->type != DM_CFG_INT)
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goto_bad;
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if (cn->v->v.i == 512)
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*block_size_sectors = 1;
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else if (cn->v->v.i == 4096)
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*block_size_sectors = 8;
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else
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goto_bad;
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if (!strncmp(key, "low_watermark", strlen("low_watermark"))) {
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if (sscanf(val, "%llu", (unsigned long long *)&settings->low_watermark) != 1)
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goto_bad;
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if (settings->low_watermark > 100)
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goto_bad;
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settings->low_watermark_set = 1;
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return 1;
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}
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} else if (!strcmp(cn->key, "high_watermark")) {
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if (cn->v->type != DM_CFG_INT)
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goto_bad;
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settings->high_watermark = (uint64_t)cn->v->v.i;
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if (settings->high_watermark > 100)
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goto_bad;
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settings->high_watermark_set = 1;
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if (!strncmp(key, "writeback_jobs", strlen("writeback_jobs"))) {
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if (sscanf(val, "%llu", (unsigned long long *)&settings->writeback_jobs) != 1)
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goto_bad;
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settings->writeback_jobs_set = 1;
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return 1;
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}
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} else if (!strcmp(cn->key, "low_watermark")) {
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if (cn->v->type != DM_CFG_INT)
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goto_bad;
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settings->low_watermark = (uint64_t)cn->v->v.i;
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if (settings->low_watermark > 100)
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goto_bad;
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settings->low_watermark_set = 1;
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if (!strncmp(key, "autocommit_blocks", strlen("autocommit_blocks"))) {
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if (sscanf(val, "%llu", (unsigned long long *)&settings->autocommit_blocks) != 1)
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goto_bad;
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settings->autocommit_blocks_set = 1;
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return 1;
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}
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} else if (!strcmp(cn->key, "writeback_jobs")) {
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if (cn->v->type != DM_CFG_INT)
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goto_bad;
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settings->writeback_jobs = (uint64_t)cn->v->v.i;
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settings->writeback_jobs_set = 1;
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if (!strncmp(key, "autocommit_time", strlen("autocommit_time"))) {
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if (sscanf(val, "%llu", (unsigned long long *)&settings->autocommit_time) != 1)
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goto_bad;
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settings->autocommit_time_set = 1;
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return 1;
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}
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} else if (!strcmp(cn->key, "autocommit_blocks")) {
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if (cn->v->type != DM_CFG_INT)
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goto_bad;
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settings->autocommit_blocks = (uint64_t)cn->v->v.i;
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settings->autocommit_blocks_set = 1;
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if (!strncmp(key, "fua", strlen("fua"))) {
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if (settings->nofua_set) {
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log_error("Setting fua and nofua cannot both be set.");
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} else if (!strcmp(cn->key, "autocommit_time")) {
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if (cn->v->type != DM_CFG_INT)
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goto_bad;
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settings->autocommit_time = (uint64_t)cn->v->v.i;
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settings->autocommit_time_set = 1;
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} else if (!strcmp(cn->key, "fua")) {
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if (settings->nofua_set) {
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log_error("Setting fua and nofua cannot both be set.");
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return 0;
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}
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if (cn->v->type != DM_CFG_INT)
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goto_bad;
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settings->fua = (unsigned)cn->v->v.i;
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settings->fua_set = 1;
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} else if (!strcmp(cn->key, "nofua")) {
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if (settings->fua_set) {
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log_error("Setting fua and nofua cannot both be set.");
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return 0;
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}
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if (cn->v->type != DM_CFG_INT)
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goto_bad;
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settings->nofua = (unsigned)cn->v->v.i;
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settings->nofua_set = 1;
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} else if (!strcmp(cn->key, "cleaner")) {
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if (cn->v->type != DM_CFG_INT)
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goto_bad;
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settings->cleaner = (unsigned) cn->v->v.i;
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settings->cleaner_set = 1;
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} else if (!strcmp(cn->key, "max_age")) {
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if (cn->v->type != DM_CFG_INT)
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goto_bad;
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settings->max_age = (unsigned) cn->v->v.i;
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settings->max_age_set = 1;
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} else if (settings->new_key) {
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log_error("Setting %s is not recognized. Only one unrecognized setting is allowed.", cn->key);
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return 0;
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}
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if (sscanf(val, "%u", &settings->fua) != 1)
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goto_bad;
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settings->fua_set = 1;
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return 1;
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}
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if (!strncmp(key, "nofua", strlen("nofua"))) {
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if (settings->fua_set) {
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log_error("Setting fua and nofua cannot both be set.");
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return 0;
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}
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if (sscanf(val, "%u", &settings->nofua) != 1)
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goto_bad;
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settings->nofua_set = 1;
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return 1;
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}
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if (!strncmp(key, "cleaner", strlen("cleaner"))) {
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if (sscanf(val, "%u", &settings->cleaner) != 1)
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goto_bad;
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settings->cleaner_set = 1;
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return 1;
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}
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if (!strncmp(key, "max_age", strlen("max_age"))) {
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if (sscanf(val, "%u", &settings->max_age) != 1)
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goto_bad;
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settings->max_age_set = 1;
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return 1;
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}
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if (settings->new_key) {
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log_error("Setting %s is not recognized. Only one unrecognized setting is allowed.", key);
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return 0;
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}
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log_warn("Unrecognized writecache setting \"%s\" may cause activation failure.", key);
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if (yes_no_prompt("Use unrecognized writecache setting? [y/n]: ") == 'n') {
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log_error("Aborting writecache conversion.");
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return 0;
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}
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log_warn("Using unrecognized writecache setting: %s = %s.", key, val);
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settings->new_key = dm_pool_strdup(cmd->mem, key);
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settings->new_val = dm_pool_strdup(cmd->mem, val);
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return 1;
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bad:
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log_error("Invalid setting: %s", key);
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return 0;
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}
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int get_writecache_settings(struct cmd_context *cmd, struct writecache_settings *settings,
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uint32_t *block_size_sectors)
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{
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struct arg_value_group_list *group;
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const char *str;
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char key[64];
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char val[64];
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int num;
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int pos;
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/*
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* "grouped" means that multiple --cachesettings options can be used.
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* Each option is also allowed to contain multiple key = val pairs.
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*/
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dm_list_iterate_items(group, &cmd->arg_value_groups) {
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if (!grouped_arg_is_set(group->arg_values, cachesettings_ARG))
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continue;
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if (!(str = grouped_arg_str_value(group->arg_values, cachesettings_ARG, NULL)))
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break;
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pos = 0;
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while (pos < strlen(str)) {
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/* scan for "key1=val1 key2 = val2 key3= val3" */
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memset(key, 0, sizeof(key));
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memset(val, 0, sizeof(val));
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if (sscanf(str + pos, " %63[^=]=%63s %n", key, val, &num) != 2) {
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log_error("Invalid setting at: %s", str+pos);
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} else {
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log_warn("Unrecognized writecache setting \"%s\" may cause activation failure.", cn->key);
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if (yes_no_prompt("Use unrecognized writecache setting? [y/n]: ") == 'n') {
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log_error("Aborting writecache conversion.");
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return 0;
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}
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pos += num;
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settings->new_key = dm_pool_strdup(cmd->mem, cn->key);
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switch (cn->v->type) {
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case DM_CFG_INT:
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snprintf(val, sizeof(val), FMTd64, cn->v->v.i);
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settings->new_val = dm_pool_strdup(cmd->mem, val);
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break;
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case DM_CFG_STRING:
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settings->new_val = dm_pool_strdup(cmd->mem, cn->v->v.str);
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break;
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default:
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log_error("Unsupported unrecognized setting %s value.", cn->key);
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return 0;
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}
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if (!settings->new_key || !settings->new_val) {
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log_error("Failed to copy unrecognized setting %s.", cn->key);
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return 0;
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}
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if (!_get_one_writecache_setting(cmd, settings, key, val, block_size_sectors))
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return_0;
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log_warn("Using unrecognized writecache setting: %s = %s.",
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settings->new_key, settings->new_val);
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}
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}
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@ -1359,6 +1323,76 @@ int get_writecache_settings(struct cmd_context *cmd, struct writecache_settings
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}
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return 1;
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bad:
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log_error("Invalid setting: %s", cn->key);
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return 0;
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}
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int get_writecache_settings(struct cmd_context *cmd, struct writecache_settings *settings,
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uint32_t *block_size_sectors)
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{
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struct arg_value_group_list *group;
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struct dm_config_tree *result = NULL, *prev = NULL, *current = NULL;
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const struct dm_config_node *cns, *cn;
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int ok = 0;
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const char *str;
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/*
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* "grouped" means that multiple --cachesettings options can be used.
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* Each option is also allowed to contain multiple key = val pairs.
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*/
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dm_list_iterate_items(group, &cmd->arg_value_groups) {
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if (!grouped_arg_is_set(group->arg_values, cachesettings_ARG))
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continue;
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if (!(current = dm_config_create()))
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goto_out;
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if (prev)
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current->cascade = prev;
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prev = current;
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if (!(str = grouped_arg_str_value(group->arg_values, cachesettings_ARG, NULL)))
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break;
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if (!dm_config_parse_without_dup_node_check(current, str, str + strlen(str)))
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goto_out;
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}
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if (current) {
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if (!(result = dm_config_flatten(current)))
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goto_out;
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if (!_get_writecache_setting(cmd, result->root, settings, block_size_sectors))
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goto_out;
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} else if ((cns = find_config_tree_node(cmd, allocation_cache_settings_CFG_SECTION, NULL))) {
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/* Fallback to lvm.conf cache settings for 'writecache{}' */
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/* TODO: support profiles */
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for (cn = cns->child; cn; cn = cn->sib) {
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if (!cn->child)
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continue; /* Ignore section without settings */
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if (cn->v || strcmp(cn->key, "writecache") != 0)
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continue; /* Ignore non-matching settings */
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if (!_get_writecache_setting(cmd, cn->child, settings, block_size_sectors))
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goto_out;
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}
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}
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ok = 1;
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out:
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if (result)
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dm_config_destroy(result);
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while (prev) {
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current = prev->cascade;
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dm_config_destroy(prev);
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prev = current;
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}
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return ok;
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}
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/* FIXME move to lib */
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