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freebsd-dev/sys/compat/linprocfs/linprocfs.c
John Baldwin 65c9b4303b - Change fill_kinfo_proc() to require that the process is locked when it 
is called.
- Change sysctl_out_proc() to require that the process is locked when it
  is called and to drop the lock before it returns.  If this proves too
  complex we can change sysctl_out_proc() to simply acquire the lock at
  the very end and have the calling code drop the lock right after it
  returns.
- Lock the process we are going to export before the p_cansee() in the
  loop in sysctl_kern_proc() and hold the lock until we call
  sysctl_out_proc().
- Don't call p_cansee() on the process about to be exported twice in
  the aforementioned loop.
2002-04-09 20:10:46 +00:00

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/*
* Copyright (c) 2000 Dag-Erling Coïdan Smørgrav
* Copyright (c) 1999 Pierre Beyssac
* Copyright (c) 1993 Jan-Simon Pendry
* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)procfs_status.c 8.4 (Berkeley) 6/15/94
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/blist.h>
#include <sys/conf.h>
#include <sys/dkstat.h>
#include <sys/exec.h>
#include <sys/jail.h>
#include <sys/kernel.h>
#include <sys/linker.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/mutex.h>
#include <sys/namei.h>
#include <sys/proc.h>
#include <sys/resourcevar.h>
#include <sys/sbuf.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <sys/tty.h>
#include <sys/user.h>
#include <sys/vmmeter.h>
#include <sys/vnode.h>
#include <net/if.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_map.h>
#include <vm/vm_param.h>
#include <vm/vm_object.h>
#include <vm/swap_pager.h>
#include <machine/clock.h>
#ifdef __alpha__
#include <machine/alpha_cpu.h>
#include <machine/cpuconf.h>
#include <machine/rpb.h>
extern int ncpus;
#endif /* __alpha__ */
#ifdef __i386__
#include <machine/cputypes.h>
#include <machine/md_var.h>
#endif /* __i386__ */
#include <machine/../linux/linux.h>
#include <compat/linux/linux_ioctl.h>
#include <compat/linux/linux_mib.h>
#include <compat/linux/linux_util.h>
#include <fs/pseudofs/pseudofs.h>
#include <fs/procfs/procfs.h>
/*
* Various conversion macros
*/
#define T2J(x) (((x) * 100UL) / (stathz ? stathz : hz)) /* ticks to jiffies */
#define T2S(x) ((x) / (stathz ? stathz : hz)) /* ticks to seconds */
#define B2K(x) ((x) >> 10) /* bytes to kbytes */
#define B2P(x) ((x) >> PAGE_SHIFT) /* bytes to pages */
#define P2B(x) ((x) << PAGE_SHIFT) /* pages to bytes */
#define P2K(x) ((x) << (PAGE_SHIFT - 10)) /* pages to kbytes */
/*
* Filler function for proc/meminfo
*/
static int
linprocfs_domeminfo(PFS_FILL_ARGS)
{
unsigned long memtotal; /* total memory in bytes */
unsigned long memused; /* used memory in bytes */
unsigned long memfree; /* free memory in bytes */
unsigned long memshared; /* shared memory ??? */
unsigned long buffers, cached; /* buffer / cache memory ??? */
u_quad_t swaptotal; /* total swap space in bytes */
u_quad_t swapused; /* used swap space in bytes */
u_quad_t swapfree; /* free swap space in bytes */
vm_object_t object;
memtotal = physmem * PAGE_SIZE;
/*
* The correct thing here would be:
*
memfree = cnt.v_free_count * PAGE_SIZE;
memused = memtotal - memfree;
*
* but it might mislead linux binaries into thinking there
* is very little memory left, so we cheat and tell them that
* all memory that isn't wired down is free.
*/
memused = cnt.v_wire_count * PAGE_SIZE;
memfree = memtotal - memused;
if (swapblist == NULL) {
swaptotal = 0;
swapfree = 0;
} else {
swaptotal = (u_quad_t)swapblist->bl_blocks * 1024; /* XXX why 1024? */
swapfree = (u_quad_t)swapblist->bl_root->u.bmu_avail * PAGE_SIZE;
}
swapused = swaptotal - swapfree;
memshared = 0;
TAILQ_FOREACH(object, &vm_object_list, object_list)
if (object->shadow_count > 1)
memshared += object->resident_page_count;
memshared *= PAGE_SIZE;
/*
* We'd love to be able to write:
*
buffers = bufspace;
*
* but bufspace is internal to vfs_bio.c and we don't feel
* like unstaticizing it just for linprocfs's sake.
*/
buffers = 0;
cached = cnt.v_cache_count * PAGE_SIZE;
sbuf_printf(sb,
" total: used: free: shared: buffers: cached:\n"
"Mem: %lu %lu %lu %lu %lu %lu\n"
"Swap: %llu %llu %llu\n"
"MemTotal: %9lu kB\n"
"MemFree: %9lu kB\n"
"MemShared:%9lu kB\n"
"Buffers: %9lu kB\n"
"Cached: %9lu kB\n"
"SwapTotal:%9llu kB\n"
"SwapFree: %9llu kB\n",
memtotal, memused, memfree, memshared, buffers, cached,
swaptotal, swapused, swapfree,
B2K(memtotal), B2K(memfree),
B2K(memshared), B2K(buffers), B2K(cached),
B2K(swaptotal), B2K(swapfree));
return (0);
}
#ifdef __alpha__
/*
* Filler function for proc/cpuinfo (Alpha version)
*/
static int
linprocfs_docpuinfo(PFS_FILL_ARGS)
{
u_int64_t type, major;
struct pcs *pcsp;
const char *model, *sysname;
static const char *cpuname[] = {
"EV3", "EV4", "Simulate", "LCA4", "EV5", "EV45", "EV56",
"EV6", "PCA56", "PCA57", "EV67", "EV68CB", "EV68AL"
};
pcsp = LOCATE_PCS(hwrpb, hwrpb->rpb_primary_cpu_id);
type = pcsp->pcs_proc_type;
major = (type & PCS_PROC_MAJOR) >> PCS_PROC_MAJORSHIFT;
if (major < sizeof(cpuname)/sizeof(char *)) {
model = cpuname[major - 1];
} else {
model = "unknown";
}
sysname = alpha_dsr_sysname();
sbuf_printf(sb,
"cpu\t\t\t: Alpha\n"
"cpu model\t\t: %s\n"
"cpu variation\t\t: %ld\n"
"cpu revision\t\t: %ld\n"
"cpu serial number\t: %s\n"
"system type\t\t: %s\n"
"system variation\t: %s\n"
"system revision\t\t: %ld\n"
"system serial number\t: %s\n"
"cycle frequency [Hz]\t: %lu\n"
"timer frequency [Hz]\t: %lu\n"
"page size [bytes]\t: %ld\n"
"phys. address bits\t: %ld\n"
"max. addr. space #\t: %ld\n"
"BogoMIPS\t\t: %lu.%02lu\n"
"kernel unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
"user unaligned acc\t: %ld (pc=%lx,va=%lx)\n"
"platform string\t\t: %s\n"
"cpus detected\t\t: %d\n"
,
model,
pcsp->pcs_proc_var,
*(int *)hwrpb->rpb_revision,
" ",
" ",
"0",
0,
" ",
hwrpb->rpb_cc_freq,
hz,
hwrpb->rpb_page_size,
hwrpb->rpb_phys_addr_size,
hwrpb->rpb_max_asn,
0, 0,
0, 0, 0,
0, 0, 0,
sysname,
ncpus);
return (0);
}
#endif /* __alpha__ */
#ifdef __i386__
/*
* Filler function for proc/cpuinfo (i386 version)
*/
static int
linprocfs_docpuinfo(PFS_FILL_ARGS)
{
int class, i, fqmhz, fqkhz;
/*
* We default the flags to include all non-conflicting flags,
* and the Intel versions of conflicting flags.
*/
static char *flags[] = {
"fpu", "vme", "de", "pse", "tsc",
"msr", "pae", "mce", "cx8", "apic",
"sep", "sep", "mtrr", "pge", "mca",
"cmov", "pat", "pse36", "pn", "b19",
"b20", "b21", "mmxext", "mmx", "fxsr",
"xmm", "b26", "b27", "b28", "b29",
"3dnowext", "3dnow"
};
switch (cpu_class) {
case CPUCLASS_286:
class = 2;
break;
case CPUCLASS_386:
class = 3;
break;
case CPUCLASS_486:
class = 4;
break;
case CPUCLASS_586:
class = 5;
break;
case CPUCLASS_686:
class = 6;
break;
default:
class = 0;
break;
}
sbuf_printf(sb,
"processor\t: %d\n"
"vendor_id\t: %.20s\n"
"cpu family\t: %d\n"
"model\t\t: %d\n"
"stepping\t: %d\n",
0, cpu_vendor, class, cpu, cpu_id & 0xf);
sbuf_cat(sb,
"flags\t\t:");
if (!strcmp(cpu_vendor, "AuthenticAMD") && (class < 6)) {
flags[16] = "fcmov";
} else if (!strcmp(cpu_vendor, "CyrixInstead")) {
flags[24] = "cxmmx";
}
for (i = 0; i < 32; i++)
if (cpu_feature & (1 << i))
sbuf_printf(sb, " %s", flags[i]);
sbuf_cat(sb, "\n");
if (class >= 5) {
fqmhz = (tsc_freq + 4999) / 1000000;
fqkhz = ((tsc_freq + 4999) / 10000) % 100;
sbuf_printf(sb,
"cpu MHz\t\t: %d.%02d\n"
"bogomips\t: %d.%02d\n",
fqmhz, fqkhz, fqmhz, fqkhz);
}
return (0);
}
#endif /* __i386__ */
/*
* Filler function for proc/mtab
*
* This file doesn't exist in Linux' procfs, but is included here so
* users can symlink /compat/linux/etc/mtab to /proc/mtab
*/
static int
linprocfs_domtab(PFS_FILL_ARGS)
{
struct nameidata nd;
struct mount *mp;
const char *lep;
char *dlep, *flep, *mntto, *mntfrom, *fstype;
size_t lep_len;
int error;
/* resolve symlinks etc. in the emulation tree prefix */
NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, linux_emul_path, td);
flep = NULL;
if (namei(&nd) != 0 || vn_fullpath(td, nd.ni_vp, &dlep, &flep) == -1)
lep = linux_emul_path;
else
lep = dlep;
lep_len = strlen(lep);
mtx_lock(&mountlist_mtx);
error = 0;
TAILQ_FOREACH(mp, &mountlist, mnt_list) {
error = VFS_STATFS(mp, &mp->mnt_stat, td);
if (error)
break;
/* determine device name */
mntfrom = mp->mnt_stat.f_mntfromname;
/* determine mount point */
mntto = mp->mnt_stat.f_mntonname;
if (strncmp(mntto, lep, lep_len) == 0 &&
mntto[lep_len] == '/')
mntto += lep_len;
/* determine fs type */
fstype = mp->mnt_stat.f_fstypename;
if (strcmp(fstype, pn->pn_info->pi_name) == 0)
mntfrom = fstype = "proc";
else if (strcmp(fstype, "procfs") == 0)
continue;
sbuf_printf(sb, "%s %s %s %s", mntfrom, mntto, fstype,
mp->mnt_stat.f_flags & MNT_RDONLY ? "ro" : "rw");
#define ADD_OPTION(opt, name) \
if (mp->mnt_stat.f_flags & (opt)) sbuf_printf(sb, "," name);
ADD_OPTION(MNT_SYNCHRONOUS, "sync");
ADD_OPTION(MNT_NOEXEC, "noexec");
ADD_OPTION(MNT_NOSUID, "nosuid");
ADD_OPTION(MNT_NODEV, "nodev");
ADD_OPTION(MNT_UNION, "union");
ADD_OPTION(MNT_ASYNC, "async");
ADD_OPTION(MNT_SUIDDIR, "suiddir");
ADD_OPTION(MNT_NOSYMFOLLOW, "nosymfollow");
ADD_OPTION(MNT_NOATIME, "noatime");
#undef ADD_OPTION
/* a real Linux mtab will also show NFS options */
sbuf_printf(sb, " 0 0\n");
}
mtx_unlock(&mountlist_mtx);
if (flep != NULL)
free(flep, M_TEMP);
return (error);
}
/*
* Filler function for proc/stat
*/
static int
linprocfs_dostat(PFS_FILL_ARGS)
{
sbuf_printf(sb,
"cpu %ld %ld %ld %ld\n"
"disk 0 0 0 0\n"
"page %u %u\n"
"swap %u %u\n"
"intr %u\n"
"ctxt %u\n"
"btime %lld\n",
T2J(cp_time[CP_USER]),
T2J(cp_time[CP_NICE]),
T2J(cp_time[CP_SYS] /*+ cp_time[CP_INTR]*/),
T2J(cp_time[CP_IDLE]),
cnt.v_vnodepgsin,
cnt.v_vnodepgsout,
cnt.v_swappgsin,
cnt.v_swappgsout,
cnt.v_intr,
cnt.v_swtch,
(quad_t)boottime.tv_sec);
return (0);
}
/*
* Filler function for proc/uptime
*/
static int
linprocfs_douptime(PFS_FILL_ARGS)
{
struct timeval tv;
getmicrouptime(&tv);
sbuf_printf(sb, "%lld.%02ld %ld.%02ld\n",
(quad_t)tv.tv_sec, tv.tv_usec / 10000,
T2S(cp_time[CP_IDLE]), T2J(cp_time[CP_IDLE]) % 100);
return (0);
}
/*
* Filler function for proc/version
*/
static int
linprocfs_doversion(PFS_FILL_ARGS)
{
char osname[LINUX_MAX_UTSNAME];
char osrelease[LINUX_MAX_UTSNAME];
linux_get_osname(td->td_proc, osname);
linux_get_osrelease(td->td_proc, osrelease);
sbuf_printf(sb,
"%s version %s (des@freebsd.org) (gcc version " __VERSION__ ")"
" #4 Sun Dec 18 04:30:00 CET 1977\n", osname, osrelease);
return (0);
}
/*
* Filler function for proc/loadavg
*/
static int
linprocfs_doloadavg(PFS_FILL_ARGS)
{
sbuf_printf(sb,
"%d.%02d %d.%02d %d.%02d %d/%d %d\n",
(int)(averunnable.ldavg[0] / averunnable.fscale),
(int)(averunnable.ldavg[0] * 100 / averunnable.fscale % 100),
(int)(averunnable.ldavg[1] / averunnable.fscale),
(int)(averunnable.ldavg[1] * 100 / averunnable.fscale % 100),
(int)(averunnable.ldavg[2] / averunnable.fscale),
(int)(averunnable.ldavg[2] * 100 / averunnable.fscale % 100),
1, /* number of running tasks */
nprocs, /* number of tasks */
lastpid /* the last pid */
);
return (0);
}
/*
* Filler function for proc/pid/stat
*/
static int
linprocfs_doprocstat(PFS_FILL_ARGS)
{
struct kinfo_proc kp;
PROC_LOCK(p);
fill_kinfo_proc(p, &kp);
sbuf_printf(sb, "%d", p->p_pid);
#define PS_ADD(name, fmt, arg) sbuf_printf(sb, " " fmt, arg)
PS_ADD("comm", "(%s)", p->p_comm);
PS_ADD("statr", "%c", '0'); /* XXX */
PS_ADD("ppid", "%d", p->p_pptr ? p->p_pptr->p_pid : 0);
PS_ADD("pgrp", "%d", p->p_pgid);
PS_ADD("session", "%d", p->p_session->s_sid);
PROC_UNLOCK(p);
PS_ADD("tty", "%d", 0); /* XXX */
PS_ADD("tpgid", "%d", 0); /* XXX */
PS_ADD("flags", "%u", 0); /* XXX */
PS_ADD("minflt", "%u", 0); /* XXX */
PS_ADD("cminflt", "%u", 0); /* XXX */
PS_ADD("majflt", "%u", 0); /* XXX */
PS_ADD("cminflt", "%u", 0); /* XXX */
PS_ADD("utime", "%d", 0); /* XXX */
PS_ADD("stime", "%d", 0); /* XXX */
PS_ADD("cutime", "%d", 0); /* XXX */
PS_ADD("cstime", "%d", 0); /* XXX */
PS_ADD("counter", "%d", 0); /* XXX */
PS_ADD("priority", "%d", 0); /* XXX */
PS_ADD("timeout", "%u", 0); /* XXX */
PS_ADD("itrealvalue", "%u", 0); /* XXX */
PS_ADD("starttime", "%d", 0); /* XXX */
PS_ADD("vsize", "%u", kp.ki_size);
PS_ADD("rss", "%u", P2K(kp.ki_rssize));
PS_ADD("rlim", "%u", 0); /* XXX */
PS_ADD("startcode", "%u", (unsigned)0);
PS_ADD("endcode", "%u", 0); /* XXX */
PS_ADD("startstack", "%u", 0); /* XXX */
PS_ADD("esp", "%u", 0); /* XXX */
PS_ADD("eip", "%u", 0); /* XXX */
PS_ADD("signal", "%d", 0); /* XXX */
PS_ADD("blocked", "%d", 0); /* XXX */
PS_ADD("sigignore", "%d", 0); /* XXX */
PS_ADD("sigcatch", "%d", 0); /* XXX */
PS_ADD("wchan", "%u", 0); /* XXX */
PS_ADD("nswap", "%lu", (long unsigned)0); /* XXX */
PS_ADD("cnswap", "%lu", (long unsigned)0); /* XXX */
PS_ADD("exitsignal", "%d", 0); /* XXX */
PS_ADD("processor", "%d", 0); /* XXX */
#undef PS_ADD
sbuf_putc(sb, '\n');
return (0);
}
/*
* Map process state to descriptive letter. Note that this does not
* quite correspond to what Linux outputs, but it's close enough.
*/
static char *state_str[] = {
"? (unknown)",
"I (idle)",
"R (running)",
"S (sleeping)",
"T (stopped)",
"Z (zombie)",
"W (waiting)",
"M (mutex)"
};
/*
* Filler function for proc/pid/status
*/
static int
linprocfs_doprocstatus(PFS_FILL_ARGS)
{
struct kinfo_proc kp;
char *state;
segsz_t lsize;
int i;
mtx_lock_spin(&sched_lock);
if (p->p_stat > sizeof state_str / sizeof *state_str)
state = state_str[0];
else
state = state_str[(int)p->p_stat];
mtx_unlock_spin(&sched_lock);
PROC_LOCK(p);
fill_kinfo_proc(p, &kp);
sbuf_printf(sb, "Name:\t%s\n", p->p_comm); /* XXX escape */
sbuf_printf(sb, "State:\t%s\n", state);
/*
* Credentials
*/
sbuf_printf(sb, "Pid:\t%d\n", p->p_pid);
sbuf_printf(sb, "PPid:\t%d\n", p->p_pptr ?
p->p_pptr->p_pid : 0);
sbuf_printf(sb, "Uid:\t%d %d %d %d\n", p->p_ucred->cr_ruid,
p->p_ucred->cr_uid,
p->p_ucred->cr_svuid,
/* FreeBSD doesn't have fsuid */
p->p_ucred->cr_uid);
sbuf_printf(sb, "Gid:\t%d %d %d %d\n", p->p_ucred->cr_rgid,
p->p_ucred->cr_gid,
p->p_ucred->cr_svgid,
/* FreeBSD doesn't have fsgid */
p->p_ucred->cr_gid);
sbuf_cat(sb, "Groups:\t");
for (i = 0; i < p->p_ucred->cr_ngroups; i++)
sbuf_printf(sb, "%d ", p->p_ucred->cr_groups[i]);
PROC_UNLOCK(p);
sbuf_putc(sb, '\n');
/*
* Memory
*
* While our approximation of VmLib may not be accurate (I
* don't know of a simple way to verify it, and I'm not sure
* it has much meaning anyway), I believe it's good enough.
*
* The same code that could (I think) accurately compute VmLib
* could also compute VmLck, but I don't really care enough to
* implement it. Submissions are welcome.
*/
sbuf_printf(sb, "VmSize:\t%8u kB\n", B2K(kp.ki_size));
sbuf_printf(sb, "VmLck:\t%8u kB\n", P2K(0)); /* XXX */
sbuf_printf(sb, "VmRss:\t%8u kB\n", P2K(kp.ki_rssize));
sbuf_printf(sb, "VmData:\t%8u kB\n", P2K(kp.ki_dsize));
sbuf_printf(sb, "VmStk:\t%8u kB\n", P2K(kp.ki_ssize));
sbuf_printf(sb, "VmExe:\t%8u kB\n", P2K(kp.ki_tsize));
lsize = B2P(kp.ki_size) - kp.ki_dsize -
kp.ki_ssize - kp.ki_tsize - 1;
sbuf_printf(sb, "VmLib:\t%8u kB\n", P2K(lsize));
/*
* Signal masks
*
* We support up to 128 signals, while Linux supports 32,
* but we only define 32 (the same 32 as Linux, to boot), so
* just show the lower 32 bits of each mask. XXX hack.
*
* NB: on certain platforms (Sparc at least) Linux actually
* supports 64 signals, but this code is a long way from
* running on anything but i386, so ignore that for now.
*/
PROC_LOCK(p);
sbuf_printf(sb, "SigPnd:\t%08x\n", p->p_siglist.__bits[0]);
/*
* I can't seem to find out where the signal mask is in
* relation to struct proc, so SigBlk is left unimplemented.
*/
sbuf_printf(sb, "SigBlk:\t%08x\n", 0); /* XXX */
sbuf_printf(sb, "SigIgn:\t%08x\n", p->p_sigignore.__bits[0]);
sbuf_printf(sb, "SigCgt:\t%08x\n", p->p_sigcatch.__bits[0]);
PROC_UNLOCK(p);
/*
* Linux also prints the capability masks, but we don't have
* capabilities yet, and when we do get them they're likely to
* be meaningless to Linux programs, so we lie. XXX
*/
sbuf_printf(sb, "CapInh:\t%016x\n", 0);
sbuf_printf(sb, "CapPrm:\t%016x\n", 0);
sbuf_printf(sb, "CapEff:\t%016x\n", 0);
return (0);
}
/*
* Filler function for proc/pid/cmdline
*/
static int
linprocfs_doproccmdline(PFS_FILL_ARGS)
{
struct ps_strings pstr;
int error, i;
/*
* If we are using the ps/cmdline caching, use that. Otherwise
* revert back to the old way which only implements full cmdline
* for the currept process and just p->p_comm for all other
* processes.
* Note that if the argv is no longer available, we deliberately
* don't fall back on p->p_comm or return an error: the authentic
* Linux behaviour is to return zero-length in this case.
*/
if (ps_argsopen || !p_cansee(td->td_proc, p)) {
PROC_LOCK(p);
if (p->p_args) {
sbuf_bcpy(sb, p->p_args->ar_args, p->p_args->ar_length);
PROC_UNLOCK(p);
} else if (p != td->td_proc) {
sbuf_printf(sb, "%.*s", MAXCOMLEN, p->p_comm);
PROC_UNLOCK(p);
} else {
PROC_UNLOCK(p);
error = copyin((void*)PS_STRINGS, &pstr, sizeof(pstr));
if (error)
return (error);
for (i = 0; i < pstr.ps_nargvstr; i++) {
sbuf_copyin(sb, pstr.ps_argvstr[i], 0);
sbuf_printf(sb, "%c", '\0');
}
}
}
return (0);
}
/*
* Filler function for proc/net/dev
*/
static int
linprocfs_donetdev(PFS_FILL_ARGS)
{
char ifname[16]; /* XXX LINUX_IFNAMSIZ */
struct ifnet *ifp;
sbuf_printf(sb, "%6s|%58s|%s\n%6s|%58s|%58s\n",
"Inter-", " Receive", " Transmit", " face",
"bytes packets errs drop fifo frame compressed",
"bytes packets errs drop fifo frame compressed");
TAILQ_FOREACH(ifp, &ifnet, if_link) {
linux_ifname(ifp, ifname, sizeof ifname);
sbuf_printf(sb, "%6.6s:", ifname);
sbuf_printf(sb, "%8lu %7lu %4lu %4lu %4lu %5lu %10lu %9lu ",
0UL, 0UL, 0UL, 0UL, 0UL, 0UL, 0UL, 0UL);
sbuf_printf(sb, "%8lu %7lu %4lu %4lu %4lu %5lu %7lu %10lu\n",
0UL, 0UL, 0UL, 0UL, 0UL, 0UL, 0UL, 0UL);
}
return (0);
}
#if 0
extern struct cdevsw *cdevsw[];
/*
* Filler function for proc/devices
*/
static int
linprocfs_dodevices(PFS_FILL_ARGS)
{
int i;
sbuf_printf(sb, "Character devices:\n");
for (i = 0; i < NUMCDEVSW; i++)
if (cdevsw[i] != NULL)
sbuf_printf(sb, "%3d %s\n", i, cdevsw[i]->d_name);
sbuf_printf(sb, "\nBlock devices:\n");
return (0);
}
#endif
/*
* Filler function for proc/cmdline
*/
static int
linprocfs_docmdline(PFS_FILL_ARGS)
{
sbuf_printf(sb, "BOOT_IMAGE=%s", kernelname);
sbuf_printf(sb, " ro root=302\n");
return (0);
}
#if 0
/*
* Filler function for proc/modules
*/
static int
linprocfs_domodules(PFS_FILL_ARGS)
{
struct linker_file *lf;
TAILQ_FOREACH(lf, &linker_files, link) {
sbuf_printf(sb, "%-20s%8lu%4d\n", lf->filename,
(unsigned long)lf->size, lf->refs);
}
return (0);
}
#endif
/*
* Constructor
*/
static int
linprocfs_init(PFS_INIT_ARGS)
{
struct pfs_node *root;
struct pfs_node *dir;
root = pi->pi_root;
#define PFS_CREATE_FILE(name) \
pfs_create_file(root, #name, &linprocfs_do##name, NULL, NULL, PFS_RD)
PFS_CREATE_FILE(cmdline);
PFS_CREATE_FILE(cpuinfo);
#if 0
PFS_CREATE_FILE(devices);
#endif
PFS_CREATE_FILE(loadavg);
PFS_CREATE_FILE(meminfo);
#if 0
PFS_CREATE_FILE(modules);
#endif
PFS_CREATE_FILE(mtab);
PFS_CREATE_FILE(stat);
PFS_CREATE_FILE(uptime);
PFS_CREATE_FILE(version);
#undef PFS_CREATE_FILE
pfs_create_link(root, "self", &procfs_docurproc,
NULL, NULL, 0);
dir = pfs_create_dir(root, "net", NULL, NULL, 0);
pfs_create_file(dir, "dev", &linprocfs_donetdev,
NULL, NULL, PFS_RD);
dir = pfs_create_dir(root, "pid", NULL, NULL, PFS_PROCDEP);
pfs_create_file(dir, "cmdline", &linprocfs_doproccmdline,
NULL, NULL, PFS_RD);
pfs_create_link(dir, "exe", &procfs_doprocfile,
NULL, &procfs_notsystem, 0);
pfs_create_file(dir, "mem", &procfs_doprocmem,
&procfs_attr, &procfs_candebug, PFS_RDWR|PFS_RAW);
pfs_create_file(dir, "stat", &linprocfs_doprocstat,
NULL, NULL, PFS_RD);
pfs_create_file(dir, "status", &linprocfs_doprocstatus,
NULL, NULL, PFS_RD);
return (0);
}
/*
* Destructor
*/
static int
linprocfs_uninit(PFS_INIT_ARGS)
{
/* nothing to do, pseudofs will GC */
return (0);
}
PSEUDOFS(linprocfs, 1);
MODULE_DEPEND(linprocfs, linux, 1, 1, 1);
MODULE_DEPEND(linprocfs, procfs, 1, 1, 1);
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