/*
* pool_btt_lseek -- (internal) perform lseek in BTT file mode
*/
static inline off_t
pool_btt_lseek(struct pool_data *pool, off_t offset, int whence)
{
off_t result;
if ((result = util_lseek(pool->set_file->fd, offset, whence)) == -1)
ERR("!lseek");
return result;
}
/*
* util_poolset_parse -- (internal) parse pool set config file
*
* Returns 1 if the file is a valid pool set config file, 0 if the file
* is not a pool set header, and -1 in case of any error.
*
* XXX: use memory mapped file
*/
int
util_poolset_parse(const char *path, int fd, struct pool_set **setp)
{
LOG(3, "path %s fd %d setp %p", path, fd, setp);
struct pool_set *set;
enum parser_codes result;
char line[PARSER_MAX_LINE];
char *s;
char *ppath;
char *pool_desc;
char *node_addr;
char *cp;
size_t psize;
FILE *fs;
if (util_lseek(fd, 0, SEEK_SET) != 0) {
ERR("!lseek %d", fd);
return -1;
}
fd = dup(fd);
if (fd < 0) {
ERR("!dup");
return -1;
}
/* associate a stream with the file descriptor */
if ((fs = fdopen(fd, "r")) == NULL) {
ERR("!fdopen %d", fd);
close(fd);
return -1;
}
unsigned nlines = 0;
unsigned nparts = 0; /* number of parts in current replica */
/* read the first line */
s = fgets(line, PARSER_MAX_LINE, fs);
nlines++;
set = Zalloc(sizeof(struct pool_set));
if (set == NULL) {
ERR("!Malloc for pool set");
goto err;
}
/* check also if the last character is '\n' */
if (s && strncmp(line, POOLSET_HDR_SIG, POOLSET_HDR_SIG_LEN) == 0 &&
line[POOLSET_HDR_SIG_LEN] == '\n') {
/* 'PMEMPOOLSET' signature detected */
LOG(10, "PMEMPOOLSET");
int ret = util_parse_add_replica(&set);
if (ret != 0)
goto err;
nparts = 0;
result = PARSER_CONTINUE;
} else {
result = PARSER_PMEMPOOLSET;
}
while (result == PARSER_CONTINUE) {
/* read next line */
s = fgets(line, PARSER_MAX_LINE, fs);
nlines++;
if (s) {
/* chop off newline and comments */
if ((cp = strchr(line, '\n')) != NULL)
*cp = '\0';
if (cp != s && (cp = strchr(line, '#')) != NULL)
*cp = '\0';
/* skip comments and blank lines */
if (cp == s)
continue;
}
if (!s) {
if (nparts >= 1) {
result = PARSER_FORMAT_OK;
} else {
if (set->nreplicas == 1)
result = PARSER_SET_NO_PARTS;
else
result = PARSER_REP_NO_PARTS;
}
} else if (strncmp(line, POOLSET_REPLICA_SIG,
POOLSET_REPLICA_SIG_LEN) == 0) {
if (line[POOLSET_REPLICA_SIG_LEN] != '\0') {
/* something more than 'REPLICA' */
if (!isblank(line[POOLSET_REPLICA_SIG_LEN])) {
result = PARSER_REPLICA;
continue;
}
/* check if it is a remote replica */
result = parser_read_replica(
line + POOLSET_REPLICA_SIG_LEN,
&node_addr, &pool_desc);
if (result == PARSER_CONTINUE) {
/* remote REPLICA */
LOG(10, "REMOTE REPLICA "
"node address '%s' "
"pool set descriptor '%s'",
node_addr, pool_desc);
if (util_parse_add_remote_replica(&set,
node_addr, pool_desc))
goto err;
}
} else if (nparts >= 1) {
/* 'REPLICA' signature detected */
LOG(10, "REPLICA");
int ret = util_parse_add_replica(&set);
if (ret != 0)
goto err;
nparts = 0;
result = PARSER_CONTINUE;
} else {
if (set->nreplicas == 1)
result = PARSER_SET_NO_PARTS;
else
result = PARSER_REP_NO_PARTS;
}
} else {
/* read size and path */
result = parser_read_line(line, &psize, &ppath);
if (result == PARSER_CONTINUE) {
/* add a new pool's part to the list */
int ret = util_parse_add_part(set,
ppath, psize);
if (ret != 0)
goto err;
nparts++;
}
}
}
if (result == PARSER_FORMAT_OK) {
LOG(4, "set file format correct (%s)", path);
(void) fclose(fs);
util_poolset_set_size(set);
*setp = set;
return 0;
} else {
ERR("%s [%s:%d]", path, parser_errstr[result], nlines);
errno = EINVAL;
}
err:
(void) fclose(fs);
if (set)
util_poolset_free(set);
return -1;
}
