From bcaf0a97858de7ab21e2bb877e5ac25a7e050525 Mon Sep 17 00:00:00 2001 From: Ian Rogers Date: Fri, 11 Feb 2022 02:34:06 -0800 Subject: perf namespaces: Add functions to access nsinfo MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Having functions to access nsinfo reduces the places where reference counting checking needs to be added. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Alexey Bayduraev Cc: Andi Kleen Cc: Andrew Morton Cc: André Almeida Cc: Andy Shevchenko Cc: Darren Hart Cc: Davidlohr Bueso Cc: Dmitriy Vyukov Cc: Eric Dumazet Cc: German Gomez Cc: Hao Luo Cc: James Clark Cc: Jin Yao Cc: Jiri Olsa Cc: John Garry Cc: Kajol Jain Cc: Kan Liang Cc: Leo Yan Cc: Madhavan Srinivasan Cc: Mark Rutland Cc: Masami Hiramatsu Cc: Miaoqian Lin Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Riccardo Mancini Cc: Shunsuke Nakamura Cc: Song Liu Cc: Stephane Eranian Cc: Stephen Brennan Cc: Steven Rostedt (VMware) Cc: Thomas Gleixner Cc: Thomas Richter Cc: Yury Norov Link: http://lore.kernel.org/lkml/20220211103415.2737789-14-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/namespaces.c | 50 +++++++++++++++++++++++++++++++++++--------- 1 file changed, 40 insertions(+), 10 deletions(-) (limited to 'tools/perf/util/namespaces.c') diff --git a/tools/perf/util/namespaces.c b/tools/perf/util/namespaces.c index 48aa3217300b..dd536220cdb9 100644 --- a/tools/perf/util/namespaces.c +++ b/tools/perf/util/namespaces.c @@ -76,7 +76,7 @@ static int nsinfo__get_nspid(struct nsinfo *nsi, const char *path) if (strstr(statln, "Tgid:") != NULL) { nsi->tgid = (pid_t)strtol(strrchr(statln, '\t'), NULL, 10); - nsi->nstgid = nsi->tgid; + nsi->nstgid = nsinfo__tgid(nsi); } if (strstr(statln, "NStgid:") != NULL) { @@ -108,7 +108,7 @@ int nsinfo__init(struct nsinfo *nsi) if (snprintf(oldns, PATH_MAX, "/proc/self/ns/mnt") >= PATH_MAX) return rv; - if (asprintf(&newns, "/proc/%d/ns/mnt", nsi->pid) == -1) + if (asprintf(&newns, "/proc/%d/ns/mnt", nsinfo__pid(nsi)) == -1) return rv; if (stat(oldns, &old_stat) < 0) @@ -129,7 +129,7 @@ int nsinfo__init(struct nsinfo *nsi) /* If we're dealing with a process that is in a different PID namespace, * attempt to work out the innermost tgid for the process. */ - if (snprintf(spath, PATH_MAX, "/proc/%d/status", nsi->pid) >= PATH_MAX) + if (snprintf(spath, PATH_MAX, "/proc/%d/status", nsinfo__pid(nsi)) >= PATH_MAX) goto out; rv = nsinfo__get_nspid(nsi, spath); @@ -166,7 +166,7 @@ struct nsinfo *nsinfo__new(pid_t pid) return nsi; } -struct nsinfo *nsinfo__copy(struct nsinfo *nsi) +struct nsinfo *nsinfo__copy(const struct nsinfo *nsi) { struct nsinfo *nnsi; @@ -175,11 +175,11 @@ struct nsinfo *nsinfo__copy(struct nsinfo *nsi) nnsi = calloc(1, sizeof(*nnsi)); if (nnsi != NULL) { - nnsi->pid = nsi->pid; - nnsi->tgid = nsi->tgid; - nnsi->nstgid = nsi->nstgid; - nnsi->need_setns = nsi->need_setns; - nnsi->in_pidns = nsi->in_pidns; + nnsi->pid = nsinfo__pid(nsi); + nnsi->tgid = nsinfo__tgid(nsi); + nnsi->nstgid = nsinfo__nstgid(nsi); + nnsi->need_setns = nsinfo__need_setns(nsi); + nnsi->in_pidns = nsinfo__in_pidns(nsi); if (nsi->mntns_path) { nnsi->mntns_path = strdup(nsi->mntns_path); if (!nnsi->mntns_path) { @@ -193,7 +193,7 @@ struct nsinfo *nsinfo__copy(struct nsinfo *nsi) return nnsi; } -void nsinfo__delete(struct nsinfo *nsi) +static void nsinfo__delete(struct nsinfo *nsi) { zfree(&nsi->mntns_path); free(nsi); @@ -212,6 +212,36 @@ void nsinfo__put(struct nsinfo *nsi) nsinfo__delete(nsi); } +bool nsinfo__need_setns(const struct nsinfo *nsi) +{ + return nsi->need_setns; +} + +void nsinfo__clear_need_setns(struct nsinfo *nsi) +{ + nsi->need_setns = false; +} + +pid_t nsinfo__tgid(const struct nsinfo *nsi) +{ + return nsi->tgid; +} + +pid_t nsinfo__nstgid(const struct nsinfo *nsi) +{ + return nsi->nstgid; +} + +pid_t nsinfo__pid(const struct nsinfo *nsi) +{ + return nsi->pid; +} + +pid_t nsinfo__in_pidns(const struct nsinfo *nsi) +{ + return nsi->in_pidns; +} + void nsinfo__mountns_enter(struct nsinfo *nsi, struct nscookie *nc) { -- cgit v1.2.3