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Thu, 13 Mar 2025 16:10:09 GMT (envelope-from git) Date: Thu, 13 Mar 2025 16:10:09 GMT Message-Id: <202503131610.52DGA9gk054812@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Konstantin Belousov Subject: git: bf46aec4b29a - main - libprocstat: add helper to query knotes for specific kqueue List-Id: Commit messages for all branches of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-all List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-all@freebsd.org Sender: owner-dev-commits-src-all@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: kib X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: bf46aec4b29a72bcaaa9f1b2fc446ee299f5a6fd Auto-Submitted: auto-generated The branch main has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=bf46aec4b29a72bcaaa9f1b2fc446ee299f5a6fd commit bf46aec4b29a72bcaaa9f1b2fc446ee299f5a6fd Author: Konstantin Belousov AuthorDate: 2025-02-24 23:44:10 +0000 Commit: Konstantin Belousov CommitDate: 2025-03-13 16:09:35 +0000 libprocstat: add helper to query knotes for specific kqueue Reviewed by: markj Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D49163 --- lib/libprocstat/Symbol.map | 2 ++ lib/libprocstat/libprocstat.c | 66 +++++++++++++++++++++++++++++++++++++++++++ lib/libprocstat/libprocstat.h | 4 +++ 3 files changed, 72 insertions(+) diff --git a/lib/libprocstat/Symbol.map b/lib/libprocstat/Symbol.map index c2ea7e95312c..3d71c3eaae4a 100644 --- a/lib/libprocstat/Symbol.map +++ b/lib/libprocstat/Symbol.map @@ -50,6 +50,8 @@ FBSD_1.7 { }; FBSD_1.8 { + procstat_get_kqueue_info; procstat_getrlimitusage; + procstat_freekqinfo; procstat_freerlimitusage; }; \ No newline at end of file diff --git a/lib/libprocstat/libprocstat.c b/lib/libprocstat/libprocstat.c index 90e4879ca05b..3c70c939ff7e 100644 --- a/lib/libprocstat/libprocstat.c +++ b/lib/libprocstat/libprocstat.c @@ -2817,3 +2817,69 @@ procstat_freerlimitusage(struct procstat *procstat __unused, rlim_t *resusage) { free(resusage); } + +static struct kinfo_knote * +procstat_get_kqueue_info_sysctl(pid_t pid, int kqfd, unsigned int *cntp, + char *errbuf) +{ + int error, name[5]; + struct kinfo_knote *val; + size_t len; + + name[0] = CTL_KERN; + name[1] = KERN_PROC; + name[2] = KERN_PROC_KQUEUE; + name[3] = pid; + name[4] = kqfd; + + len = 0; + error = sysctl(name, nitems(name), NULL, &len, NULL, 0); + if (error == -1) { + snprintf(errbuf, _POSIX2_LINE_MAX, + "KERN_PROC_KQUEUE.pid<%d>.kq<%d> (size q) failed: %s", + pid, kqfd, strerror(errno)); + return (NULL); + } + val = malloc(len); + if (val == NULL) { + snprintf(errbuf, _POSIX2_LINE_MAX, "no memory"); + return (NULL); + } + + error = sysctl(name, nitems(name), val, &len, NULL, 0); + if (error == -1) { + snprintf(errbuf, _POSIX2_LINE_MAX, + "KERN_PROC_KQUEUE.pid<%d>.kq<%d> failed: %s", + pid, kqfd, strerror(errno)); + free(val); + return (NULL); + } + *cntp = len / sizeof(*val); + return (val); +} + +struct kinfo_knote * +procstat_get_kqueue_info(struct procstat *procstat, + struct kinfo_proc *kp, int kqfd, unsigned int *count, char *errbuf) +{ + switch (procstat->type) { + case PROCSTAT_KVM: + warnx("kvm method is not supported"); + return (NULL); + case PROCSTAT_SYSCTL: + return (procstat_get_kqueue_info_sysctl(kp->ki_pid, kqfd, + count, errbuf)); + case PROCSTAT_CORE: + warnx("core method is not supported"); + return (NULL); + default: + warnx("unknown access method: %d", procstat->type); + return (NULL); + } +} + +void +procstat_freekqinfo(struct procstat *procstat __unused, struct kinfo_knote *v) +{ + free(v); +} diff --git a/lib/libprocstat/libprocstat.h b/lib/libprocstat/libprocstat.h index 81a3ac05393d..0e9a4214414c 100644 --- a/lib/libprocstat/libprocstat.h +++ b/lib/libprocstat/libprocstat.h @@ -110,6 +110,7 @@ struct kinfo_kstack; struct kinfo_proc; struct kinfo_vmentry; +struct kinfo_knote; struct procstat; struct ptrace_lwpinfo; struct rlimit; @@ -204,6 +205,7 @@ void procstat_freeauxv(struct procstat *procstat, Elf_Auxinfo *auxv); #endif void procstat_freeenvv(struct procstat *procstat); void procstat_freegroups(struct procstat *procstat, gid_t *groups); +void procstat_freekqinfo(struct procstat *procstat, struct kinfo_knote *kni); void procstat_freekstack(struct procstat *procstat, struct kinfo_kstack *kkstp); void procstat_freeprocs(struct procstat *procstat, struct kinfo_proc *p); @@ -219,6 +221,8 @@ struct filestat_list *procstat_getfiles(struct procstat *procstat, struct kinfo_proc *kp, int mmapped); struct kinfo_proc *procstat_getprocs(struct procstat *procstat, int what, int arg, unsigned int *count); +struct kinfo_knote *procstat_get_kqueue_info(struct procstat *procstat, + struct kinfo_proc *kp, int kqfd, unsigned int *count, char *errbuf); int procstat_get_pipe_info(struct procstat *procstat, struct filestat *fst, struct pipestat *pipe, char *errbuf); int procstat_get_pts_info(struct procstat *procstat, struct filestat *fst,