diff options
Diffstat (limited to 'libglusterfs/src/common-utils.c')
| -rw-r--r-- | libglusterfs/src/common-utils.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/libglusterfs/src/common-utils.c b/libglusterfs/src/common-utils.c index 8c18b91a7b4..7a654314ee5 100644 --- a/libglusterfs/src/common-utils.c +++ b/libglusterfs/src/common-utils.c @@ -2166,3 +2166,143 @@ generate_glusterfs_ctx_id (void) return gf_strdup (tmp_str); } +char * +gf_get_reserved_ports () +{ + int proc_fd = -1; + char *proc_file = "/proc/sys/net/ipv4/ip_local_reserved_ports"; + char buffer[4096] = {0,}; + char *ports_info = NULL; + int32_t ret = -1; + + proc_fd = open (proc_file, O_RDONLY); + if (proc_fd == -1) { + /* What should be done in this case? error out from here + * and thus stop the glusterfs process from starting or + * continue with older method of using any of the available + * port? For now 2nd option is considered. + */ + gf_log ("glusterfs", GF_LOG_WARNING, "could not open " + "the file /proc/sys/net/ipv4/ip_local_reserved_ports " + "for getting reserved ports info (%s)", + strerror (errno)); + goto out; + } + + ret = read (proc_fd, buffer, sizeof (buffer)); + if (ret < 0) { + gf_log ("glusterfs", GF_LOG_WARNING, "could not " + "read the file %s for getting reserved ports " + "info (%s)", proc_file, strerror (errno)); + goto out; + } + ports_info = gf_strdup (buffer); + +out: + if (proc_fd != -1) + close (proc_fd); + return ports_info; +} + +int +gf_process_reserved_ports (gf_boolean_t *ports) +{ + int ret = -1; + char *ports_info = NULL; + char *tmp = NULL; + char *blocked_port = NULL; + gf_boolean_t result = _gf_false; + + ports_info = gf_get_reserved_ports (); + if (!ports_info) { + gf_log ("glusterfs", GF_LOG_WARNING, "Not able to get reserved " + "ports, hence there is a possibility that glusterfs " + "may consume reserved port"); + goto out; + } + + blocked_port = strtok_r (ports_info, ",",&tmp); + if (!blocked_port || !strcmp (blocked_port, ports_info)) { + if (!blocked_port) + blocked_port = ports_info; + result = gf_ports_reserved (blocked_port, ports); + blocked_port = strtok_r (NULL, ",", &tmp); + } + + while (blocked_port) { + result = gf_ports_reserved (blocked_port, ports); + blocked_port = strtok_r (NULL, ",", &tmp); + } + + ret = 0; + +out: + GF_FREE (ports_info); + return ret; +} + +gf_boolean_t +gf_ports_reserved (char *blocked_port, gf_boolean_t *ports) +{ + gf_boolean_t result = _gf_false; + char *range_port = NULL; + int16_t tmp_port1, tmp_port2 = -1; + + if (strstr (blocked_port, "-") == NULL) { + /* get rid of the new line character*/ + if (blocked_port[strlen(blocked_port) -1] == '\n') + blocked_port[strlen(blocked_port) -1] = '\0'; + if (gf_string2int16 (blocked_port, &tmp_port1) == 0) { + if (tmp_port1 > (GF_CLIENT_PORT_CEILING - 1) + || tmp_port1 < 0) { + gf_log ("glusterfs-socket", GF_LOG_WARNING, + "invalid port %d", tmp_port1); + result = _gf_true; + goto out; + } else { + gf_log ("glusterfs", GF_LOG_DEBUG, + "blocking port %d", tmp_port1); + ports[tmp_port1] = _gf_true; + } + } else { + gf_log ("glusterfs-socket", GF_LOG_WARNING, "%s is " + "not a valid port identifier", blocked_port); + result = _gf_true; + goto out; + } + } else { + range_port = strtok (blocked_port, "-"); + if (!range_port){ + result = _gf_true; + goto out; + } + if (gf_string2int16 (range_port, &tmp_port1) == 0) { + if (tmp_port1 > (GF_CLIENT_PORT_CEILING - 1)) + tmp_port1 = GF_CLIENT_PORT_CEILING - 1; + if (tmp_port1 < 0) + tmp_port1 = 0; + } + range_port = strtok (NULL, "-"); + if (!range_port) { + result = _gf_true; + goto out; + } + /* get rid of the new line character*/ + if (range_port[strlen(range_port) -1] == '\n') + range_port[strlen(range_port) - 1] = '\0'; + if (gf_string2int16 (range_port, &tmp_port2) == 0) { + if (tmp_port2 > + (GF_CLIENT_PORT_CEILING - 1)) + tmp_port2 = GF_CLIENT_PORT_CEILING - 1; + if (tmp_port2 < 0) + tmp_port2 = 0; + } + gf_log ("glusterfs", GF_LOG_DEBUG, "lower: %d, higher: %d", + tmp_port1, tmp_port2); + for (; tmp_port1 <= tmp_port2; tmp_port1++) + ports[tmp_port1] = _gf_true; + } + +out: + return result; +} |