#include <sys/types.h>
#include <wchar.h>
#include <libsmartcols.h>
+#include <libmount.h>
+
+#ifdef HAVE_LINUX_NET_NAMESPACE_H
+#include <stdbool.h>
+#include <sys/socket.h>
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
+#include <linux/net_namespace.h>
+#endif
#include "pathnames.h"
#include "nls.h"
#include "procutils.h"
#include "strutils.h"
#include "namespace.h"
-#include "path.h"
#include "idcache.h"
#include "debug.h"
-UL_DEBUG_DEFINE_MASK(lsns);
+static UL_DEBUG_DEFINE_MASK(lsns);
UL_DEBUG_DEFINE_MASKNAMES(lsns) = UL_DEBUG_EMPTY_MASKNAMES;
#define LSNS_DEBUG_INIT (1 << 1)
#define LSNS_DEBUG_NS (1 << 3)
#define LSNS_DEBUG_ALL 0xFFFF
+#define LSNS_NETNS_UNUSABLE -2
+
#define DBG(m, x) __UL_DBG(lsns, LSNS_DEBUG_, m, x)
#define ON_DBG(m, x) __UL_DBG_CALL(lsns, LSNS_DEBUG_, m, x)
-struct idcache *uid_cache = NULL;
+#define UL_DEBUG_CURRENT_MASK UL_DEBUG_MASK(lsns)
+#include "debugobj.h"
+
+static struct idcache *uid_cache = NULL;
/* column IDs */
enum {
COL_PPID,
COL_COMMAND,
COL_UID,
- COL_USER
+ COL_USER,
+ COL_NETNSID,
+ COL_NSFS,
};
/* column names */
double whint; /* width hint (N < 1 is in percent of termwidth) */
int flags; /* SCOLS_FL_* */
const char *help;
+ int json_type;
};
/* columns descriptions */
static const struct colinfo infos[] = {
- [COL_NS] = { "NS", 10, SCOLS_FL_RIGHT, N_("command of the process holding the lock") },
+ [COL_NS] = { "NS", 10, SCOLS_FL_RIGHT, N_("namespace identifier (inode number)"), SCOLS_JSON_NUMBER },
[COL_TYPE] = { "TYPE", 5, 0, N_("kind of namespace") },
[COL_PATH] = { "PATH", 0, 0, N_("path to the namespace")},
- [COL_NPROCS] = { "NPROCS", 5, SCOLS_FL_RIGHT, N_("number of processes in the namespace") },
- [COL_PID] = { "PID", 5, SCOLS_FL_RIGHT, N_("lowers PID in the namespace") },
- [COL_PPID] = { "PPID", 5, SCOLS_FL_RIGHT, N_("PPID of the PID") },
+ [COL_NPROCS] = { "NPROCS", 5, SCOLS_FL_RIGHT, N_("number of processes in the namespace"), SCOLS_JSON_NUMBER },
+ [COL_PID] = { "PID", 5, SCOLS_FL_RIGHT, N_("lowest PID in the namespace"), SCOLS_JSON_NUMBER },
+ [COL_PPID] = { "PPID", 5, SCOLS_FL_RIGHT, N_("PPID of the PID"), SCOLS_JSON_NUMBER },
[COL_COMMAND] = { "COMMAND", 0, SCOLS_FL_TRUNC, N_("command line of the PID")},
- [COL_UID] = { "UID", 0, SCOLS_FL_RIGHT, N_("user ID of the PID")},
- [COL_USER] = { "USER", 0, 0, N_("username of the PID")}
+ [COL_UID] = { "UID", 0, SCOLS_FL_RIGHT, N_("UID of the PID"), SCOLS_JSON_NUMBER},
+ [COL_USER] = { "USER", 0, 0, N_("username of the PID")},
+ [COL_NETNSID] = { "NETNSID", 0, SCOLS_FL_RIGHT, N_("namespace ID as used by network subsystem")},
+ [COL_NSFS] = { "NSFS", 0, SCOLS_FL_WRAP, N_("nsfs mountpoint (usually used network subsystem)")}
};
static int columns[ARRAY_SIZE(infos) * 2];
LSNS_ID_PID,
LSNS_ID_UTS,
LSNS_ID_IPC,
- LSNS_ID_USER
+ LSNS_ID_USER,
+ LSNS_ID_CGROUP
};
static char *ns_names[] = {
[LSNS_ID_PID] = "pid",
[LSNS_ID_UTS] = "uts",
[LSNS_ID_IPC] = "ipc",
- [LSNS_ID_USER] = "user"
+ [LSNS_ID_USER] = "user",
+ [LSNS_ID_CGROUP] = "cgroup"
};
struct lsns_namespace {
ino_t id;
int type; /* LSNS_* */
int nprocs;
+ int netnsid;
struct lsns_process *proc;
struct libscols_line *outline;
struct lsns_process *parent;
+
+ int netnsid;
};
struct lsns {
json : 1,
tree : 1,
list : 1,
- notrunc : 1,
- no_headings: 1;
+ no_trunc : 1,
+ no_headings: 1,
+ no_wrap : 1;
+
+ struct libmnt_table *tab;
+};
+
+struct netnsid_cache {
+ ino_t ino;
+ int id;
+ struct list_head netnsids;
};
+static struct list_head netnsids_cache;
+
+static int netlink_fd = -1;
+
static void lsns_init_debug(void)
{
- __UL_INIT_DEBUG(lsns, LSNS_DEBUG_, 0, LSNS_DEBUG);
+ __UL_INIT_DEBUG_FROM_ENV(lsns, LSNS_DEBUG_, 0, LSNS_DEBUG);
}
static int ns_name2type(const char *name)
return -1;
}
+static int has_column(int id)
+{
+ size_t i;
+
+ for (i = 0; i < ncolumns; i++) {
+ if (columns[i] == id)
+ return 1;
+ }
+ return 0;
+}
+
static inline int get_column_id(int num)
{
assert(num >= 0);
return &infos[ get_column_id(num) ];
}
-static ino_t get_ns_ino(int dir, const char *nsname, ino_t *ino)
+static int get_ns_ino(int dir, const char *nsname, ino_t *ino)
{
struct stat st;
char path[16];
return 0;
}
+static int parse_proc_stat(FILE *fp, pid_t *pid, char *state, pid_t *ppid)
+{
+ char *line = NULL, *p;
+ size_t len = 0;
+ int rc;
+
+ if (getline(&line, &len, fp) < 0) {
+ rc = -errno;
+ goto error;
+ }
+
+ p = strrchr(line, ')');
+ if (p == NULL ||
+ sscanf(line, "%d (", pid) != 1 ||
+ sscanf(p, ") %c %d*[^\n]", state, ppid) != 2) {
+ rc = -EINVAL;
+ goto error;
+ }
+ rc = 0;
+
+error:
+ free(line);
+ return rc;
+}
+
+#ifdef HAVE_LINUX_NET_NAMESPACE_H
+static int netnsid_cache_find(ino_t netino, int *netnsid)
+{
+ struct list_head *p;
+
+ list_for_each(p, &netnsids_cache) {
+ struct netnsid_cache *e = list_entry(p,
+ struct netnsid_cache,
+ netnsids);
+ if (e->ino == netino) {
+ *netnsid = e->id;
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static void netnsid_cache_add(ino_t netino, int netnsid)
+{
+ struct netnsid_cache *e;
+
+ e = xcalloc(1, sizeof(*e));
+ e->ino = netino;
+ e->id = netnsid;
+ INIT_LIST_HEAD(&e->netnsids);
+ list_add(&e->netnsids, &netnsids_cache);
+}
+
+static int get_netnsid_via_netlink_send_request(int target_fd)
+{
+ unsigned char req[NLMSG_SPACE(sizeof(struct rtgenmsg))
+ + RTA_SPACE(sizeof(int32_t))];
+
+ struct nlmsghdr *nlh = (struct nlmsghdr *)req;
+ struct rtgenmsg *rt = NLMSG_DATA(req);
+ struct rtattr *rta = (struct rtattr *)
+ (req + NLMSG_SPACE(sizeof(struct rtgenmsg)));
+ int32_t *fd = RTA_DATA(rta);
+
+ nlh->nlmsg_len = sizeof(req);
+ nlh->nlmsg_flags = NLM_F_REQUEST;
+ nlh->nlmsg_type = RTM_GETNSID;
+ rt->rtgen_family = AF_UNSPEC;
+ rta->rta_type = NETNSA_FD;
+ rta->rta_len = RTA_SPACE(sizeof(int32_t));
+ *fd = target_fd;
+
+ if (send(netlink_fd, req, sizeof(req), 0) < 0)
+ return -1;
+ return 0;
+}
+
+static int get_netnsid_via_netlink_recv_response(int *netnsid)
+{
+ unsigned char res[NLMSG_SPACE(sizeof(struct rtgenmsg))
+ + ((RTA_SPACE(sizeof(int32_t))
+ < RTA_SPACE(sizeof(struct nlmsgerr)))
+ ? RTA_SPACE(sizeof(struct nlmsgerr))
+ : RTA_SPACE(sizeof(int32_t)))];
+ int rtalen;
+ ssize_t reslen;
+
+ struct nlmsghdr *nlh;
+ struct rtattr *rta;
+
+ reslen = recv(netlink_fd, res, sizeof(res), 0);
+ if (reslen < 0)
+ return -1;
+
+ nlh = (struct nlmsghdr *)res;
+ if (!(NLMSG_OK(nlh, (size_t)reslen)
+ && nlh->nlmsg_type == RTM_NEWNSID))
+ return -1;
+
+ rtalen = NLMSG_PAYLOAD(nlh, sizeof(struct rtgenmsg));
+ rta = (struct rtattr *)(res + NLMSG_SPACE(sizeof(struct rtgenmsg)));
+ if (!(RTA_OK(rta, rtalen)
+ && rta->rta_type == NETNSA_NSID))
+ return -1;
+
+ *netnsid = *(int *)RTA_DATA(rta);
+
+ return 0;
+}
+
+static int get_netnsid_via_netlink(int dir, const char *path)
+{
+ int netnsid;
+ int target_fd;
+
+ if (netlink_fd < 0)
+ return LSNS_NETNS_UNUSABLE;
+
+ target_fd = openat(dir, path, O_RDONLY);
+ if (target_fd < 0)
+ return LSNS_NETNS_UNUSABLE;
+
+ if (get_netnsid_via_netlink_send_request(target_fd) < 0) {
+ netnsid = LSNS_NETNS_UNUSABLE;
+ goto out;
+ }
+
+ if (get_netnsid_via_netlink_recv_response(&netnsid) < 0) {
+ netnsid = LSNS_NETNS_UNUSABLE;
+ goto out;
+ }
+
+ out:
+ close(target_fd);
+ return netnsid;
+}
+
+static int get_netnsid(int dir, ino_t netino)
+{
+ int netnsid;
+
+ if (!netnsid_cache_find(netino, &netnsid)) {
+ netnsid = get_netnsid_via_netlink(dir, "ns/net");
+ netnsid_cache_add(netino, netnsid);
+ }
+
+ return netnsid;
+}
+#else
+static int get_netnsid(int dir __attribute__((__unused__)),
+ ino_t netino __attribute__((__unused__)))
+{
+ return LSNS_NETNS_UNUSABLE;
+}
+#endif /* HAVE_LINUX_NET_NAMESPACE_H */
static int read_process(struct lsns *ls, pid_t pid)
{
if (!dir)
return -errno;
- p = calloc(1, sizeof(*p));
- if (!p) {
- rc = -ENOMEM;
- goto done;
- }
+ p = xcalloc(1, sizeof(*p));
+ p->netnsid = LSNS_NETNS_UNUSABLE;
if (fstat(dirfd(dir), &st) == 0) {
p->uid = st.st_uid;
rc = -errno;
goto done;
}
- rc = fscanf(f, "%d %*s %c %d*[^\n]", &p->pid, &p->state, &p->ppid);
- if (rc != 3) {
- rc = -errno;
+ rc = parse_proc_stat(f, &p->pid, &p->state, &p->ppid);
+ if (rc < 0)
goto done;
- }
rc = 0;
for (i = 0; i < ARRAY_SIZE(p->ns_ids); i++) {
continue;
rc = get_ns_ino(dirfd(dir), ns_names[i], &p->ns_ids[i]);
- if (rc && rc != -EACCES)
+ if (rc && rc != -EACCES && rc != -ENOENT)
goto done;
+ if (i == LSNS_ID_NET)
+ p->netnsid = get_netnsid(dirfd(dir), p->ns_ids[i]);
rc = 0;
}
while (proc_next_pid(proc, &pid) == 0) {
rc = read_process(ls, pid);
- if (rc && rc != -EACCES)
+ if (rc && rc != -EACCES && rc != -ENOENT)
break;
rc = 0;
}
static struct lsns_namespace *add_namespace(struct lsns *ls, int type, ino_t ino)
{
- struct lsns_namespace *ns = calloc(1, sizeof(*ns));
+ struct lsns_namespace *ns = xcalloc(1, sizeof(*ns));
if (!ns)
return NULL;
- DBG(NS, ul_debugobj(ns, "new %s[%lu]", ns_names[type], ino));
+ DBG(NS, ul_debugobj(ns, "new %s[%ju]", ns_names[type], (uintmax_t)ino));
INIT_LIST_HEAD(&ns->processes);
INIT_LIST_HEAD(&ns->namespaces);
{
struct list_head *p;
- DBG(NS, ul_debugobj(ns, "add process [%p] pid=%d to %s[%lu]", proc, proc->pid, ns_names[ns->type], ns->id));
+ DBG(NS, ul_debugobj(ns, "add process [%p] pid=%d to %s[%ju]",
+ proc, proc->pid, ns_names[ns->type], (uintmax_t)ns->id));
list_for_each(p, &ls->processes) {
struct lsns_process *xproc = list_entry(p, struct lsns_process, processes);
return cmp_numbers(xa->id, xb->id);
}
+static int netnsid_xasputs(char **str, int netnsid)
+{
+ if (netnsid >= 0)
+ return xasprintf(str, "%d", netnsid);
+#ifdef NETNSA_NSID_NOT_ASSIGNED
+ else if (netnsid == NETNSA_NSID_NOT_ASSIGNED)
+ return xasprintf(str, "%s", "unassigned");
+#endif
+ else
+ return 0;
+}
+
static int read_namespaces(struct lsns *ls)
{
struct list_head *p;
return 0;
}
+static int is_nsfs_root(struct libmnt_fs *fs, void *data)
+{
+ if (!mnt_fs_match_fstype(fs, "nsfs") || !mnt_fs_get_root(fs))
+ return 0;
+
+ return (strcmp(mnt_fs_get_root(fs), (char *)data) == 0);
+}
+
+static int is_path_included(const char *path_set, const char *elt,
+ const char sep)
+{
+ size_t elt_len;
+ size_t path_set_len;
+ char *tmp;
+
+
+ tmp = strstr(path_set, elt);
+ if (!tmp)
+ return 0;
+
+ elt_len = strlen(elt);
+ path_set_len = strlen(path_set);
+
+ /* path_set includes only elt or
+ * path_set includes elt as the first element.
+ */
+ if (tmp == path_set
+ && ((path_set_len == elt_len)
+ || (path_set[elt_len] == sep)))
+ return 1;
+
+ /* path_set includes elt at the middle
+ * or as the last element.
+ */
+ if ((*(tmp - 1) == sep)
+ && ((*(tmp + elt_len) == sep)
+ || (*(tmp + elt_len) == '\0')))
+ return 1;
+
+ return 0;
+}
+
+static int nsfs_xasputs(char **str,
+ struct lsns_namespace *ns,
+ struct libmnt_table *tab,
+ char sep)
+{
+ struct libmnt_iter *itr = mnt_new_iter(MNT_ITER_FORWARD);
+ char *expected_root;
+ struct libmnt_fs *fs = NULL;
+
+ xasprintf(&expected_root, "%s:[%ju]", ns_names[ns->type], (uintmax_t)ns->id);
+ *str = NULL;
+
+ while (mnt_table_find_next_fs(tab, itr, is_nsfs_root,
+ expected_root, &fs) == 0) {
+
+ const char *tgt = mnt_fs_get_target(fs);
+
+ if (!*str)
+ xasprintf(str, "%s", tgt);
+
+ else if (!is_path_included(*str, tgt, sep)) {
+ char *tmp = NULL;
+
+ xasprintf(&tmp, "%s%c%s", *str, sep, tgt);
+ free(*str);
+ *str = tmp;
+ }
+ }
+ free(expected_root);
+ mnt_free_iter(itr);
+
+ return 1;
+}
static void add_scols_line(struct lsns *ls, struct libscols_table *table,
struct lsns_namespace *ns, struct lsns_process *proc)
{
switch (get_column_id(i)) {
case COL_NS:
- xasprintf(&str, "%lu", ns->id);
+ xasprintf(&str, "%ju", (uintmax_t)ns->id);
break;
case COL_PID:
xasprintf(&str, "%d", (int) proc->pid);
case COL_USER:
xasprintf(&str, "%s", get_id(uid_cache, proc->uid)->name);
break;
+ case COL_NETNSID:
+ if (ns->type == LSNS_ID_NET)
+ netnsid_xasputs(&str, proc->netnsid);
+ break;
+ case COL_NSFS:
+ nsfs_xasputs(&str, ns, ls->tab, ls->no_wrap ? ',' : '\n');
+ break;
default:
break;
}
- if (str)
- scols_line_set_data(line, i, str);
+ if (str && scols_line_refer_data(line, i, str) != 0)
+ err_oom();
}
proc->outline = line;
for (i = 0; i < ncolumns; i++) {
const struct colinfo *col = get_column_info(i);
int flags = col->flags;
+ struct libscols_column *cl;
- if (ls->notrunc)
+ if (ls->no_trunc)
flags &= ~SCOLS_FL_TRUNC;
if (ls->tree && get_column_id(i) == COL_COMMAND)
flags |= SCOLS_FL_TREE;
+ if (ls->no_wrap)
+ flags &= ~SCOLS_FL_WRAP;
- if (!scols_table_new_column(tab, col->name, col->whint, flags)) {
+ cl = scols_table_new_column(tab, col->name, col->whint, flags);
+ if (cl == NULL) {
warnx(_("failed to initialize output column"));
goto err;
}
+ if (ls->json)
+ scols_column_set_json_type(cl, col->json_type);
+
+ if (!ls->no_wrap && get_column_id(i) == COL_NSFS) {
+ scols_column_set_wrapfunc(cl,
+ scols_wrapnl_chunksize,
+ scols_wrapnl_nextchunk,
+ NULL);
+ scols_column_set_safechars(cl, "\n");
+ }
}
return tab;
return 0;
}
-static void __attribute__ ((__noreturn__)) usage(FILE * out)
+static void __attribute__((__noreturn__)) usage(void)
{
+ FILE *out = stdout;
size_t i;
fputs(USAGE_HEADER, out);
fputs(_(" -l, --list use list format output\n"), out);
fputs(_(" -n, --noheadings don't print headings\n"), out);
fputs(_(" -o, --output <list> define which output columns to use\n"), out);
+ fputs(_(" --output-all output all columns\n"), out);
fputs(_(" -p, --task <pid> print process namespaces\n"), out);
fputs(_(" -r, --raw use the raw output format\n"), out);
fputs(_(" -u, --notruncate don't truncate text in columns\n"), out);
- fputs(_(" -t, --type <name> namespace type (mnt, net, ipc, user, pid, uts)\n"), out);
+ fputs(_(" -W, --nowrap don't use multi-line representation\n"), out);
+ fputs(_(" -t, --type <name> namespace type (mnt, net, ipc, user, pid, uts, cgroup)\n"), out);
fputs(USAGE_SEPARATOR, out);
- fputs(USAGE_HELP, out);
- fputs(USAGE_VERSION, out);
-
- fputs(_("\nAvailable columns (for --output):\n"), out);
+ printf(USAGE_HELP_OPTIONS(24));
+ fputs(USAGE_COLUMNS, out);
for (i = 0; i < ARRAY_SIZE(infos); i++)
fprintf(out, " %11s %s\n", infos[i].name, _(infos[i].help));
- fprintf(out, USAGE_MAN_TAIL("lsns(8)"));
+ printf(USAGE_MAN_TAIL("lsns(8)"));
- exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
+ exit(EXIT_SUCCESS);
}
int c;
int r = 0;
char *outarg = NULL;
+ enum {
+ OPT_OUTPUT_ALL = CHAR_MAX + 1
+ };
static const struct option long_opts[] = {
{ "json", no_argument, NULL, 'J' },
{ "task", required_argument, NULL, 'p' },
{ "help", no_argument, NULL, 'h' },
{ "output", required_argument, NULL, 'o' },
+ { "output-all", no_argument, NULL, OPT_OUTPUT_ALL },
{ "notruncate", no_argument, NULL, 'u' },
{ "version", no_argument, NULL, 'V' },
{ "noheadings", no_argument, NULL, 'n' },
+ { "nowrap", no_argument, NULL, 'W' },
{ "list", no_argument, NULL, 'l' },
{ "raw", no_argument, NULL, 'r' },
{ "type", required_argument, NULL, 't' },
{ 0 }
};
int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
+ int is_net = 0;
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
INIT_LIST_HEAD(&ls.processes);
INIT_LIST_HEAD(&ls.namespaces);
+ INIT_LIST_HEAD(&netnsids_cache);
while ((c = getopt_long(argc, argv,
- "Jlp:o:nruhVt:", long_opts, NULL)) != -1) {
+ "Jlp:o:nruhVt:W", long_opts, NULL)) != -1) {
err_exclusive_options(c, long_opts, excl, excl_st);
case 'o':
outarg = optarg;
break;
+ case OPT_OUTPUT_ALL:
+ for (ncolumns = 0; ncolumns < ARRAY_SIZE(infos); ncolumns++)
+ columns[ncolumns] = ncolumns;
+ break;
case 'V':
printf(UTIL_LINUX_VERSION);
return EXIT_SUCCESS;
ls.fltr_pid = strtos32_or_err(optarg, _("invalid PID argument"));
break;
case 'h':
- usage(stdout);
+ usage();
case 'n':
ls.no_headings = 1;
break;
case 'r':
- ls.raw = 1;
+ ls.no_wrap = ls.raw = 1;
break;
case 'u':
- ls.notrunc = 1;
+ ls.no_trunc = 1;
break;
case 't':
{
errx(EXIT_FAILURE, _("unknown namespace type: %s"), optarg);
ls.fltr_types[type] = 1;
ls.fltr_ntypes++;
+ if (type == LSNS_ID_NET)
+ is_net = 1;
break;
}
- case '?':
+ case 'W':
+ ls.no_wrap = 1;
+ break;
default:
- usage(stderr);
+ errtryhelp(EXIT_FAILURE);
}
}
if (!ls.fltr_ntypes) {
size_t i;
+
for (i = 0; i < ARRAY_SIZE(ns_names); i++)
ls.fltr_types[i] = 1;
}
columns[ncolumns++] = COL_NPROCS;
columns[ncolumns++] = COL_PID;
columns[ncolumns++] = COL_USER;
+ if (is_net) {
+ columns[ncolumns++] = COL_NETNSID;
+ columns[ncolumns++] = COL_NSFS;
+ }
columns[ncolumns++] = COL_COMMAND;
}
if (outarg && string_add_to_idarray(outarg, columns, ARRAY_SIZE(columns),
- &ncolumns, column_name_to_id) < 0)
+ &ncolumns, column_name_to_id) < 0)
return EXIT_FAILURE;
scols_init_debug(0);
if (!uid_cache)
err(EXIT_FAILURE, _("failed to allocate UID cache"));
+#ifdef HAVE_LINUX_NET_NAMESPACE_H
+ if (has_column(COL_NETNSID))
+ netlink_fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+#endif
+ if (has_column(COL_NSFS)) {
+ ls.tab = mnt_new_table_from_file(_PATH_PROC_MOUNTINFO);
+ if (!ls.tab)
+ err(MNT_EX_FAIL, _("failed to parse %s"), _PATH_PROC_MOUNTINFO);
+ }
+
r = read_processes(&ls);
if (!r)
r = read_namespaces(&ls);
r = show_namespaces(&ls);
}
+ mnt_free_table(ls.tab);
+ if (netlink_fd >= 0)
+ close(netlink_fd);
free_idcache(uid_cache);
return r == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
}
projects / thirdparty / util-linux.git / blobdiff