KVM method support for procstat_getgroups, procstat_getumask,
procstat_getrlimit, and procstat_getosrel. MFC after: 3 weeks
This commit is contained in:
Mikolaj Golub
parent
1b8388cde9
commit
1f84c47e42
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=250146
@ -39,6 +39,9 @@ __FBSDID("$FreeBSD$");
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#include <sys/elf.h>
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#include <sys/time.h>
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#include <sys/resourcevar.h>
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#define _WANT_UCRED
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#include <sys/ucred.h>
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#undef _WANT_UCRED
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/stat.h>
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@ -141,19 +144,30 @@ static int procstat_get_vnode_info_sysctl(struct filestat *fst,
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struct vnstat *vn, char *errbuf);
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static gid_t *procstat_getgroups_core(struct procstat_core *core,
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unsigned int *count);
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static gid_t * procstat_getgroups_kvm(kvm_t *kd, struct kinfo_proc *kp,
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unsigned int *count);
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static gid_t *procstat_getgroups_sysctl(pid_t pid, unsigned int *count);
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static struct kinfo_kstack *procstat_getkstack_sysctl(pid_t pid,
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int *cntp);
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static int procstat_getosrel_core(struct procstat_core *core,
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int *osrelp);
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static int procstat_getosrel_kvm(kvm_t *kd, struct kinfo_proc *kp,
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int *osrelp);
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static int procstat_getosrel_sysctl(pid_t pid, int *osrelp);
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static int procstat_getpathname_core(struct procstat_core *core,
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char *pathname, size_t maxlen);
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static int procstat_getpathname_sysctl(pid_t pid, char *pathname,
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size_t maxlen);
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static int procstat_getrlimit_core(struct procstat_core *core, int which,
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struct rlimit* rlimit);
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static int procstat_getrlimit_kvm(kvm_t *kd, struct kinfo_proc *kp,
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int which, struct rlimit* rlimit);
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static int procstat_getrlimit_sysctl(pid_t pid, int which,
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struct rlimit* rlimit);
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static int procstat_getumask_core(struct procstat_core *core,
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unsigned short *maskp);
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static int procstat_getumask_kvm(kvm_t *kd, struct kinfo_proc *kp,
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unsigned short *maskp);
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static int procstat_getumask_sysctl(pid_t pid, unsigned short *maskp);
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static int vntype2psfsttype(int type);
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@ -1789,6 +1803,46 @@ procstat_freevmmap(struct procstat *procstat __unused,
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free(vmmap);
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}
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static gid_t *
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procstat_getgroups_kvm(kvm_t *kd, struct kinfo_proc *kp, unsigned int *cntp)
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{
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struct proc proc;
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struct ucred ucred;
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gid_t *groups;
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size_t len;
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assert(kd != NULL);
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assert(kp != NULL);
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if (!kvm_read_all(kd, (unsigned long)kp->ki_paddr, &proc,
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sizeof(proc))) {
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warnx("can't read proc struct at %p for pid %d",
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kp->ki_paddr, kp->ki_pid);
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return (NULL);
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}
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if (proc.p_ucred == NOCRED)
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return (NULL);
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if (!kvm_read_all(kd, (unsigned long)proc.p_ucred, &ucred,
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sizeof(ucred))) {
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warnx("can't read ucred struct at %p for pid %d",
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proc.p_ucred, kp->ki_pid);
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return (NULL);
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}
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len = ucred.cr_ngroups * sizeof(gid_t);
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groups = malloc(len);
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if (groups == NULL) {
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warn("malloc(%zu)", len);
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return (NULL);
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}
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if (!kvm_read_all(kd, (unsigned long)ucred.cr_groups, groups, len)) {
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warnx("can't read groups at %p for pid %d",
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ucred.cr_groups, kp->ki_pid);
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free(groups);
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return (NULL);
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}
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*cntp = ucred.cr_ngroups;
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return (groups);
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}
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static gid_t *
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procstat_getgroups_sysctl(pid_t pid, unsigned int *cntp)
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{
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@ -1834,8 +1888,7 @@ procstat_getgroups(struct procstat *procstat, struct kinfo_proc *kp,
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{
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switch(procstat->type) {
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case PROCSTAT_KVM:
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warnx("kvm method is not supported");
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return (NULL);
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return (procstat_getgroups_kvm(procstat->kd, kp, cntp));
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case PROCSTAT_SYSCTL:
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return (procstat_getgroups_sysctl(kp->ki_pid, cntp));
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case PROCSTAT_CORE:
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@ -1853,6 +1906,24 @@ procstat_freegroups(struct procstat *procstat __unused, gid_t *groups)
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free(groups);
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}
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static int
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procstat_getumask_kvm(kvm_t *kd, struct kinfo_proc *kp, unsigned short *maskp)
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{
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struct filedesc fd;
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assert(kd != NULL);
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assert(kp != NULL);
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if (kp->ki_fd == NULL)
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return (-1);
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if (!kvm_read_all(kd, (unsigned long)kp->ki_fd, &fd, sizeof(fd))) {
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warnx("can't read filedesc at %p for pid %d", kp->ki_fd,
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kp->ki_pid);
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return (-1);
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}
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*maskp = fd.fd_cmask;
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return (0);
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}
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static int
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procstat_getumask_sysctl(pid_t pid, unsigned short *maskp)
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{
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@ -1895,8 +1966,7 @@ procstat_getumask(struct procstat *procstat, struct kinfo_proc *kp,
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{
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switch(procstat->type) {
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case PROCSTAT_KVM:
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warnx("kvm method is not supported");
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return (-1);
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return (procstat_getumask_kvm(procstat->kd, kp, maskp));
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case PROCSTAT_SYSCTL:
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return (procstat_getumask_sysctl(kp->ki_pid, maskp));
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case PROCSTAT_CORE:
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@ -1907,6 +1977,33 @@ procstat_getumask(struct procstat *procstat, struct kinfo_proc *kp,
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}
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}
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static int
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procstat_getrlimit_kvm(kvm_t *kd, struct kinfo_proc *kp, int which,
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struct rlimit* rlimit)
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{
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struct proc proc;
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unsigned long offset;
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assert(kd != NULL);
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assert(kp != NULL);
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assert(which >= 0 && which < RLIM_NLIMITS);
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if (!kvm_read_all(kd, (unsigned long)kp->ki_paddr, &proc,
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sizeof(proc))) {
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warnx("can't read proc struct at %p for pid %d",
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kp->ki_paddr, kp->ki_pid);
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return (-1);
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}
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if (proc.p_limit == NULL)
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return (-1);
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offset = (unsigned long)proc.p_limit + sizeof(struct rlimit) * which;
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if (!kvm_read_all(kd, offset, rlimit, sizeof(*rlimit))) {
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warnx("can't read rlimit struct at %p for pid %d",
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(void *)offset, kp->ki_pid);
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return (-1);
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}
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return (0);
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}
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static int
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procstat_getrlimit_sysctl(pid_t pid, int which, struct rlimit* rlimit)
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{
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@ -1958,8 +2055,8 @@ procstat_getrlimit(struct procstat *procstat, struct kinfo_proc *kp, int which,
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{
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switch(procstat->type) {
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case PROCSTAT_KVM:
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warnx("kvm method is not supported");
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return (-1);
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return (procstat_getrlimit_kvm(procstat->kd, kp, which,
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rlimit));
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case PROCSTAT_SYSCTL:
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return (procstat_getrlimit_sysctl(kp->ki_pid, which, rlimit));
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case PROCSTAT_CORE:
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@ -2031,6 +2128,23 @@ procstat_getpathname(struct procstat *procstat, struct kinfo_proc *kp,
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}
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}
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static int
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procstat_getosrel_kvm(kvm_t *kd, struct kinfo_proc *kp, int *osrelp)
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{
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struct proc proc;
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assert(kd != NULL);
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assert(kp != NULL);
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if (!kvm_read_all(kd, (unsigned long)kp->ki_paddr, &proc,
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sizeof(proc))) {
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warnx("can't read proc struct at %p for pid %d",
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kp->ki_paddr, kp->ki_pid);
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return (-1);
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}
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*osrelp = proc.p_osrel;
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return (0);
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}
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static int
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procstat_getosrel_sysctl(pid_t pid, int *osrelp)
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{
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@ -2071,8 +2185,7 @@ procstat_getosrel(struct procstat *procstat, struct kinfo_proc *kp, int *osrelp)
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{
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switch(procstat->type) {
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case PROCSTAT_KVM:
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warnx("kvm method is not supported");
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return (-1);
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return (procstat_getosrel_kvm(procstat->kd, kp, osrelp));
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case PROCSTAT_SYSCTL:
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return (procstat_getosrel_sysctl(kp->ki_pid, osrelp));
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case PROCSTAT_CORE:
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