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procps: add support for linux namespaces

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Each process in Linux has a /proc/<pid>/ns directory which contains
symbolic links to pipes that identify which namespaces that process
belongs to. This patch adds support for ps to display that information
optionally.

Signed-off-by: Aristeu Rozanski <arozansk@redhat.com>
This commit is contained in:
Aristeu Rozanski
2013-04-08 15:03:13 -04:00
parent fc503b442d
commit a01ee3c0b3
5 changed files with 136 additions and 0 deletions
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37
ps/output.c
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@@ -135,6 +135,13 @@ static int sr_ ## NAME (const proc_t* P, const proc_t* Q) { \
return 0; \
}
#define CMP_NS(NAME, ID) \
static int sr_ ## NAME (const proc_t* P, const proc_t* Q) { \
if (P->ns[ID] < Q->ns[ID]) return -1; \
if (P->ns[ID] > Q->ns[ID]) return 1; \
return 0; \
}
CMP_INT(rtprio)
CMP_SMALL(sched)
CMP_INT(cutime)
@@ -212,6 +219,13 @@ CMP_SMALL(state)
CMP_COOKED_TIME(time)
CMP_COOKED_TIME(etime)
CMP_NS(ipcns, IPCNS);
CMP_NS(mntns, MNTNS);
CMP_NS(netns, NETNS);
CMP_NS(pidns, PIDNS);
CMP_NS(userns, USERNS);
CMP_NS(utsns, UTSNS);
/* approximation to: kB of address space that could end up in swap */
static int sr_swapable(const proc_t* P, const proc_t* Q) {
unsigned long p_swapable = P->vm_data + P->vm_stack;
@@ -1170,6 +1184,22 @@ static int pr_sgi_p(char *restrict const outbuf, const proc_t *restrict const pp
}
/************************ Linux namespaces ******************************/
#define _pr_ns(NAME, ID)\
static int pr_##NAME(char *restrict const outbuf, const proc_t *restrict const pp) {\
if (pp->ns[ID])\
return snprintf(outbuf, COLWID, "%li", pp->ns[ID]);\
else\
return snprintf(outbuf, COLWID, "-");\
}
_pr_ns(ipcns, IPCNS);
_pr_ns(mntns, MNTNS);
_pr_ns(netns, NETNS);
_pr_ns(pidns, PIDNS);
_pr_ns(userns, USERNS);
_pr_ns(utsns, UTSNS);
/****************** FLASK & seLinux security stuff **********************/
// move the bulk of this to libproc sometime
@@ -1326,6 +1356,7 @@ static int pr_t_left2(char *restrict const outbuf, const proc_t *restrict const
#define USR PROC_FILLUSR /* uid_t -> user names */
#define GRP PROC_FILLGRP /* gid_t -> group names */
#define WCH PROC_FILLWCHAN /* do WCHAN lookup */
#define NS PROC_FILLNS /* read namespace information */
#define SGRP PROC_FILLSTATUS | PROC_FILLSUPGRP /* supgid -> supgrp (names) */
#define CGRP PROC_FILLCGROUP | PROC_EDITCGRPCVT /* read cgroup */
@@ -1414,6 +1445,7 @@ static const format_struct format_array[] = {
{"inblk", "INBLK", pr_nop, sr_nop, 5, 0, BSD, AN|RIGHT}, /*inblock*/
{"inblock", "INBLK", pr_nop, sr_nop, 5, 0, DEC, AN|RIGHT}, /*inblk*/
{"intpri", "PRI", pr_opri, sr_priority, 3, 0, HPU, TO|RIGHT},
{"ipcns", "IPCNS", pr_ipcns, sr_ipcns, 10, NS, LNX, ET|RIGHT},
{"jid", "JID", pr_nop, sr_nop, 1, 0, SGI, PO|RIGHT},
{"jobc", "JOBC", pr_nop, sr_nop, 4, 0, XXX, AN|RIGHT},
{"ktrace", "KTRACE", pr_nop, sr_nop, 8, 0, BSD, AN|RIGHT},
@@ -1440,9 +1472,11 @@ static const format_struct format_array[] = {
{"majflt", "MAJFLT", pr_majflt, sr_maj_flt, 6, 0, XXX, AN|RIGHT},
{"min_flt", "MINFL", pr_minflt, sr_min_flt, 6, 0, LNX, AN|RIGHT},
{"minflt", "MINFLT", pr_minflt, sr_min_flt, 6, 0, XXX, AN|RIGHT},
{"mntns", "MNTNS", pr_mntns, sr_mntns, 10, NS, LNX, ET|RIGHT},
{"msgrcv", "MSGRCV", pr_nop, sr_nop, 6, 0, XXX, AN|RIGHT},
{"msgsnd", "MSGSND", pr_nop, sr_nop, 6, 0, XXX, AN|RIGHT},
{"mwchan", "MWCHAN", pr_nop, sr_nop, 6, WCH, BSD, TO|WCHAN}, /* mutex (FreeBSD) */
{"netns", "NETNS", pr_netns, sr_netns, 10, NS, LNX, ET|RIGHT},
{"ni", "NI", pr_nice, sr_nice, 3, 0, BSD, TO|RIGHT}, /*nice*/
{"nice", "NI", pr_nice, sr_nice, 3, 0, U98, TO|RIGHT}, /*ni*/
{"nivcsw", "IVCSW", pr_nop, sr_nop, 5, 0, XXX, AN|RIGHT},
@@ -1464,6 +1498,7 @@ static const format_struct format_array[] = {
{"pgid", "PGID", pr_pgid, sr_pgrp, 5, 0, U98, PO|PIDMAX|RIGHT},
{"pgrp", "PGRP", pr_pgid, sr_pgrp, 5, 0, LNX, PO|PIDMAX|RIGHT},
{"pid", "PID", pr_procs, sr_procs, 5, 0, U98, PO|PIDMAX|RIGHT},
{"pidns", "PIDNS", pr_pidns, sr_pidns, 10, NS, LNX, ET|RIGHT},
{"pmem", "%MEM", pr_pmem, sr_rss, 4, 0, XXX, PO|RIGHT}, /*%mem*/
{"poip", "-", pr_nop, sr_nop, 1, 0, BSD, AN|RIGHT},
{"policy", "POL", pr_class, sr_sched, 3, 0, DEC, TO|LEFT},
@@ -1565,10 +1600,12 @@ static const format_struct format_array[] = {
{"upr", "UPR", pr_nop, sr_nop, 3, 0, BSD, TO|RIGHT}, /*usrpri*/
{"uprocp", "UPROCP", pr_nop, sr_nop, 8, 0, BSD, AN|RIGHT},
{"user", "USER", pr_euser, sr_euser, 8, USR, U98, ET|USER}, /* BSD n forces this to UID */
{"userns", "USERNS", pr_userns, sr_userns, 10, NS, LNX, ET|RIGHT},
{"usertime", "USER", pr_nop, sr_nop, 4, 0, DEC, ET|RIGHT},
{"usrpri", "UPR", pr_nop, sr_nop, 3, 0, DEC, TO|RIGHT}, /*upr*/
{"util", "C", pr_c, sr_pcpu, 2, 0, SGI, ET|RIGHT}, // not sure about "C"
{"utime", "UTIME", pr_nop, sr_utime, 6, 0, LNx, ET|RIGHT},
{"utsns", "UTSNS", pr_utsns, sr_utsns, 10, NS, LNX, ET|RIGHT},
{"vm_data", "DATA", pr_nop, sr_vm_data, 5, 0, LNx, PO|RIGHT},
{"vm_exe", "EXE", pr_nop, sr_vm_exe, 5, 0, LNx, PO|RIGHT},
{"vm_lib", "LIB", pr_nop, sr_vm_lib, 5, 0, LNx, PO|RIGHT},