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d5aafca1ae10aa17f927400cf6b2a7260374f8cb
mckernel/kernel/procfs.c
Balazs Gerofi d5aafca1ae VM: use RW spinlock for vm_range_lock 
Change-Id: Id4654084207d55bf77cc9f8b42795e0f9873cfa0
2020-06-12 03:07:33 +00:00

901 lines
21 KiB
C
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/**
* \file procfs.c
* License details are found in the file LICENSE.
* \brief
* McKernel procfs
* \author Naoki Hamada <nao@axe.bz> \par
* Copyright (C) 2014 AXE, Inc.
*/
/*
* HISTORY:
*/
/* procfs.c COPYRIGHT FUJITSU LIMITED 2015-2017 */
#include <types.h>
#include <kmsg.h>
#include <ihk/cpu.h>
#include <ihk/mm.h>
#include <ihk/debug.h>
#include <ihk/ikc.h>
#include <ikc/master.h>
#include <cls.h>
#include <syscall.h>
#include <kmalloc.h>
#include <process.h>
#include <page.h>
#include <mman.h>
#include <bitmap.h>
#include <init.h>
#include <rusage_private.h>
//#define DEBUG_PRINT_PROCFS
#ifdef DEBUG_PRINT_PROCFS
#define dprintf(...) kprintf(__VA_ARGS__)
#else
#define dprintf(...)
#endif
extern int snprintf(char *buf, size_t size, const char *fmt, ...);
extern int sscanf(const char * buf, const char * fmt, ...);
extern int scnprintf(char * buf, size_t size, const char *fmt, ...);
static int do_procfs_backlog(void *arg);
struct mckernel_procfs_buffer {
unsigned long next_pa;
unsigned long pos;
unsigned long size;
char buf[0];
};
#define PA_NULL (-1L)
static struct mckernel_procfs_buffer *buf_alloc(unsigned long *phys, long pos)
{
struct mckernel_procfs_buffer *buf;
buf = ihk_mc_alloc_pages(1, IHK_MC_AP_NOWAIT);
if (!buf)
return NULL;
buf->next_pa = PA_NULL;
buf->pos = pos;
buf->size = 0;
if (phys)
*phys = virt_to_phys(buf);
return buf;
}
static void buf_free(unsigned long phys)
{
struct mckernel_procfs_buffer *pbuf;
unsigned long next;
while (phys != PA_NULL) {
pbuf = phys_to_virt(phys);
next = pbuf->next_pa;
ihk_mc_free_pages(pbuf, 1);
phys = next;
}
}
static int buf_add(struct mckernel_procfs_buffer **top,
struct mckernel_procfs_buffer **cur,
const void *buf, int l)
{
int pos = 0;
int r;
int bufmax = PAGE_SIZE - sizeof(struct mckernel_procfs_buffer);
const char *chr = buf;
if (!*top) {
*top = *cur = buf_alloc(NULL, 0);
if (!*top)
return -ENOMEM;
}
while (l) {
r = bufmax - (*cur)->size;
if (!r) {
*cur = buf_alloc(&(*cur)->next_pa, (*cur)->pos +
bufmax);
if (!*cur) {
buf_free(virt_to_phys(*top));
return -ENOMEM;
}
r = bufmax;
}
if (r > l) {
r = l;
}
memcpy((*cur)->buf + (*cur)->size, chr + pos, r);
l -= r;
pos += r;
(*cur)->size += r;
}
return 0;
}
static void
procfs_thread_ctl(struct thread *thread, int msg)
{
struct ihk_ikc_channel_desc *syscall_channel;
struct ikc_scd_packet packet;
int done = 0;
syscall_channel = cpu_local_var(ikc2linux);
memset(&packet, '\0', sizeof packet);
packet.arg = thread->tid;
packet.msg = msg;
packet.osnum = ihk_mc_get_osnum();
packet.ref = thread->cpu_id;
packet.pid = thread->proc->pid;
packet.resp_pa = virt_to_phys(&done);
packet.err = 0;
ihk_ikc_send(syscall_channel, &packet, 0);
if (msg == SCD_MSG_PROCFS_TID_CREATE) {
while (!done)
cpu_pause();
}
}
void
procfs_create_thread(struct thread *thread)
{
procfs_thread_ctl(thread, SCD_MSG_PROCFS_TID_CREATE);
}
void
procfs_delete_thread(struct thread *thread)
{
procfs_thread_ctl(thread, SCD_MSG_PROCFS_TID_DELETE);
}
static int procfs_backlog(struct process_vm *vm, struct ikc_scd_packet *rpacket)
{
void *arg;
int err;
if (!(arg = kmalloc(sizeof(struct ikc_scd_packet), IHK_MC_AP_NOWAIT))) {
return -ENOMEM;
}
memcpy(arg, rpacket, sizeof(struct ikc_scd_packet));
if ((err = add_backlog(do_procfs_backlog, arg))) {
kfree(arg);
return err;
}
return 0;
}
/**
* \brief The callback function for mckernel procfs files.
*
* \param rarg returned argument
*/
static int _process_procfs_request(struct ikc_scd_packet *rpacket, int *result)
{
unsigned long rarg = rpacket->arg;
unsigned long parg, pbuf;
struct thread *thread = NULL;
struct process *proc = NULL;
struct process_vm *vm = NULL;
struct procfs_read *r;
int osnum = ihk_mc_get_osnum();
int rosnum, ret, pid, tid, ans = -EIO, eof = 0;
char *buf, *p = NULL;
char *vbuf = NULL;
char *tmp = NULL;
struct mcs_rwlock_node_irqsave lock;
unsigned long offset;
int count;
int npages;
int readwrite = 0;
int err = -EIO;
struct mckernel_procfs_buffer *buf_top = NULL;
struct mckernel_procfs_buffer *buf_cur = NULL;
dprintf("process_procfs_request: invoked.\n");
dprintf("rarg: %x\n", rarg);
parg = ihk_mc_map_memory(NULL, rarg, sizeof(struct procfs_read));
dprintf("parg: %x\n", parg);
r = ihk_mc_map_virtual(parg, 1, PTATTR_WRITABLE | PTATTR_ACTIVE);
if (r == NULL) {
ihk_mc_unmap_memory(NULL, parg, sizeof(struct procfs_read));
kprintf("ERROR: process_procfs_request: got a null procfs_read structure.\n");
goto err;
}
dprintf("r: %p\n", r);
if (rpacket->msg == SCD_MSG_PROCFS_RELEASE) {
struct mckernel_procfs_buffer *pbuf;
unsigned long phys;
unsigned long next;
for (phys = r->pbuf; phys != PA_NULL; phys = next) {
pbuf = phys_to_virt(phys);
next = pbuf->next_pa;
ihk_mc_free_pages(pbuf, 1);
}
r->ret = 0;
err = 0;
goto err;
}
if (r->pbuf == PA_NULL) {
tmp = ihk_mc_alloc_pages(1, IHK_MC_AP_NOWAIT);
if (!tmp)
goto err;
buf = tmp;
count = PAGE_SIZE;
}
else {
dprintf("remote pbuf: %x\n", r->pbuf);
pbuf = ihk_mc_map_memory(NULL, r->pbuf, r->count);
dprintf("pbuf: %x\n", pbuf);
count = r->count + ((uintptr_t)pbuf & (PAGE_SIZE - 1));
npages = (count + (PAGE_SIZE - 1)) / PAGE_SIZE;
vbuf = ihk_mc_map_virtual(pbuf, npages,
PTATTR_WRITABLE|PTATTR_ACTIVE);
dprintf("buf: %p\n", vbuf);
if (vbuf == NULL) {
ihk_mc_unmap_memory(NULL, pbuf, r->count);
kprintf("ERROR: %s: got a null buffer.\n", __func__);
goto err;
}
buf = vbuf;
readwrite = r->readwrite;
count = r->count;
dprintf("fname: %s, offset: %lx, count:%d.\n", r->fname,
r->offset, r->count);
}
offset = r->offset;
/*
* check for "mcos%d/"
*/
ret = sscanf(r->fname, "mcos%d/", &rosnum);
if (ret == 1) {
if (osnum != rosnum) {
kprintf("ERROR: process_procfs_request osnum mismatch "
"(we are %d != requested %d)\n",
osnum, rosnum);
goto end;
}
dprintf("matched mcos%d.\n", osnum);
} else {
goto end;
}
p = strchr(r->fname, '/') + 1;
/* Processing for pattern "mcos%d/xxx" files should be here.
Its template is something like what follows:
if (pattern matches) {
get the data (at 'r->offset')
and write it to 'buf'
up to 'r->count' bytes.
ans = written bytes;
goto end;
}
*/
/*
* check for "mcos%d/PID/"
*/
ret = sscanf(p, "%d/", &pid);
if (ret == 1) {
struct mcs_rwlock_node_irqsave tlock;
int tids;
struct thread *thread1 = NULL;
proc = find_process(pid, &lock);
if(proc == NULL){
kprintf("process_procfs_request: no such pid %d\n", pid);
goto end;
}
p = strchr(p, '/') + 1;
if((tids = sscanf(p, "task/%d/", &tid)) == 1){
p = strchr(p, '/') + 1;
p = strchr(p, '/') + 1;
}
else
tid = pid;
mcs_rwlock_reader_lock(&proc->threads_lock, &tlock);
list_for_each_entry(thread, &proc->threads_list, siblings_list){
if(thread->tid == tid)
break;
if(!thread1)
thread1 = thread;
}
if(thread == NULL){
kprintf("process_procfs_request: no such tid %d-%d\n", pid, tid);
if(tids){
mcs_rwlock_reader_unlock(&proc->threads_lock, &tlock);
process_unlock(proc, &lock);
goto end;
}
thread = thread1;
}
if(thread)
hold_thread(thread);
mcs_rwlock_reader_unlock(&proc->threads_lock, &tlock);
hold_process(proc);
vm = proc->vm;
if(vm)
hold_process_vm(vm);
process_unlock(proc, &lock);
}
else if (!strcmp(p, "mckernel")) {
ans = snprintf(buf, count, "%s-%s\n",
MCKERNEL_VERSION, BUILDID);
if (buf_add(&buf_top, &buf_cur, buf, ans) < 0)
goto err;
ans = 0;
goto end;
}
else if (!strcmp(p, "stat")) { /* "/proc/stat" */
extern int num_processors; /* kernel/ap.c */
int cpu;
for (cpu = 0; cpu < num_processors; ++cpu) {
ans = snprintf(buf, count, "cpu%d\n", cpu);
if (ans < 0 || ans > count)
goto err;
if (buf_add(&buf_top, &buf_cur, buf, ans) < 0)
goto err;
}
ans = 0;
goto end;
}
#ifdef POSTK_DEBUG_ARCH_DEP_42 /* /proc/cpuinfo support added. */
else if (!strcmp(p, "cpuinfo")) { /* "/proc/cpuinfo" */
ans = ihk_mc_show_cpuinfo(buf, count, 0, &eof);
if (ans < 0 || ans > count)
goto err;
if (buf_add(&buf_top, &buf_cur, buf, ans) < 0)
goto err;
ans = 0;
goto end;
}
#endif /* POSTK_DEBUG_ARCH_DEP_42 */
else if (!strcmp(p, "meminfo")) {
ans = snprintf(buf, count,
"MemTotal: %10d kB\n"
"MemFree: %10d kB\n"
"SwapTotal: %10d kB\n"
"SwapFree: %10d kB\n"
"CommitLimit: %10d kB\n"
"Committed_AS: %10d kB\n",
rusage_get_total_memory() >> 10,
rusage_get_free_memory() >> 10,
0, 0,
rusage_get_free_memory() >> 10,
rusage_get_usage_memory() >> 10);
if (ans < 0 || ans > count ||
buf_add(&buf_top, &buf_cur, buf, ans) < 0) {
goto err;
}
ans = 0;
goto end;
}
else {
kprintf("unsupported procfs entry: %s\n", p);
goto end;
}
/*
* mcos%d/PID/mem
*
* The offset is treated as the beginning of the virtual address area
* of the process. The count is the length of the area.
*/
if (strcmp(p, "mem") == 0) {
uint64_t reason = PF_POPULATE | PF_WRITE | PF_USER;
unsigned long offset = r->offset;
unsigned long left = r->count;
int ret;
struct page_table *pt = vm->address_space->page_table;
ans = 0;
if(left == 0)
goto end;
#if 0
if(!(proc->ptrace & PT_TRACED) ||
!(proc->status & (PS_STOPPED | PS_TRACED))){
ans = -EIO;
goto end;
}
#endif
if(readwrite == 0)
reason = PF_POPULATE | PF_USER;
while(left){
unsigned long pa;
char *va;
int pos = offset & (PAGE_SIZE - 1);
int size = PAGE_SIZE - pos;
if(size > left)
size = left;
ret = page_fault_process_vm(vm, (void *)offset, reason);
if(ret){
if(ans == 0)
ans = -EIO;
goto end;
}
ret = ihk_mc_pt_virt_to_phys(pt, (void *)offset, &pa);
if(ret){
if(ans == 0)
ans = -EIO;
goto end;
}
if (!is_mckernel_memory(pa, pa + size)) {
ans = -EIO;
goto end;
}
va = phys_to_virt(pa);
if(readwrite)
memcpy(va, buf + ans, size);
else
memcpy(buf + ans, va, size);
offset += size;
left -= size;
ans += size;
}
goto end;
}
/*
* mcos%d/PID/maps
*/
if (strcmp(p, "maps") == 0) {
struct vm_range *range;
if (!ihk_rwspinlock_read_trylock_noirq(&vm->memory_range_lock)) {
if (!result) {
if ((err = procfs_backlog(vm, rpacket))) {
goto err;
}
}
else {
*result = -EAGAIN;
}
goto out;
}
range = lookup_process_memory_range(vm, 0, -1);
while (range) {
/* format is (from man proc):
* address perms offset dev inode pathname
* 08048000-08056000 r-xp 00000000 03:0c 64593 /usr/sbin/gpm
*/
ans = snprintf(buf, count,
"%012lx-%012lx %s%s%s%s %lx %lx:%lx %d\t\t\t%s\n",
range->start, range->end,
range->flag & VR_PROT_READ ? "r" : "-",
range->flag & VR_PROT_WRITE ? "w" : "-",
range->flag & VR_PROT_EXEC ? "x" : "-",
range->flag & VR_PRIVATE ? "p" : "s",
/* TODO: fill in file details! */
0UL,
0UL,
0UL,
0,
range->memobj && range->memobj->path ?
range->memobj->path :
range->start == (unsigned long)vm->vdso_addr ?
"[vdso]" :
range->start == (unsigned long)vm->vvar_addr ?
"[vsyscall]" :
range->flag & VR_STACK ?
"[stack]" :
range->start >= vm->region.brk_start &&
range->end <= vm->region.brk_end_allocated ?
"[heap]" :
""
);
if (ans < 0 || ans > count ||
buf_add(&buf_top, &buf_cur, buf, ans) < 0) {
ihk_rwspinlock_read_unlock_noirq(
&vm->memory_range_lock);
goto err;
}
range = next_process_memory_range(vm, range);
}
ihk_rwspinlock_read_unlock_noirq(&vm->memory_range_lock);
ans = 0;
goto end;
}
/*
* mcos%d/PID/pagemap
*/
if (strcmp(p, "pagemap") == 0) {
uint64_t *_buf = (uint64_t *)buf;
uint64_t start, end;
/* Check alignment */
if ((offset % sizeof(uint64_t) != 0) ||
(count % sizeof(uint64_t) != 0)) {
ans = -EINVAL;
goto end;
}
start = (offset / sizeof(uint64_t)) << PAGE_SHIFT;
end = start + ((count / sizeof(uint64_t)) << PAGE_SHIFT);
if (!ihk_rwspinlock_read_trylock_noirq(&vm->memory_range_lock)) {
if (!result) {
if ((err = procfs_backlog(vm, rpacket))) {
goto err;
}
}
else {
*result = -EAGAIN;
}
goto out;
}
while (start < end) {
*_buf = ihk_mc_pt_virt_to_pagemap(proc->vm->address_space->page_table, start);
dprintf("PID: %d, /proc/pagemap: 0x%lx -> %lx\n", proc->proc->pid,
start, *_buf);
start += PAGE_SIZE;
++_buf;
}
ihk_rwspinlock_read_unlock_noirq(&vm->memory_range_lock);
dprintf("/proc/pagemap: 0x%lx - 0x%lx, count: %d\n",
start, end, count);
ans = count;
goto end;
}
/*
* mcos%d/PID/status
*/
#define BITMASKS_BUF_SIZE 2048
if (strcmp(p, "status") == 0) {
extern int num_processors; /* kernel/ap.c */
struct vm_range *range;
unsigned long lockedsize = 0;
char *bitmasks;
int bitmasks_offset = 0;
char *cpu_bitmask, *cpu_list, *numa_bitmask, *numa_list;
char *state;
struct mcs_rwlock_node_irqsave lock;
struct thread *thread_iter;
int nr_threads = 0;
bitmasks = kmalloc(BITMASKS_BUF_SIZE, IHK_MC_AP_CRITICAL);
if (!bitmasks) {
kprintf("%s: error allocating /proc/self/status bitmaks buffer\n",
__FUNCTION__);
goto err;
}
if (!ihk_rwspinlock_read_trylock_noirq(&vm->memory_range_lock)) {
if (!result) {
if ((err = procfs_backlog(vm, rpacket))) {
goto err;
}
}
else {
*result = -EAGAIN;
}
goto out;
}
range = lookup_process_memory_range(vm, 0, -1);
while (range) {
if(range->flag & VR_LOCKED)
lockedsize += range->end - range->start;
range = next_process_memory_range(vm, range);
}
ihk_rwspinlock_read_unlock_noirq(&vm->memory_range_lock);
cpu_bitmask = &bitmasks[bitmasks_offset];
bitmasks_offset += bitmap_scnprintf(cpu_bitmask,
BITMASKS_BUF_SIZE - bitmasks_offset,
thread->cpu_set.__bits, num_processors);
bitmasks_offset++;
cpu_list = &bitmasks[bitmasks_offset];
bitmasks_offset += bitmap_scnlistprintf(cpu_list,
BITMASKS_BUF_SIZE - bitmasks_offset,
thread->cpu_set.__bits, __CPU_SETSIZE);
bitmasks_offset++;
numa_bitmask = &bitmasks[bitmasks_offset];
bitmasks_offset += bitmap_scnprintf(numa_bitmask,
BITMASKS_BUF_SIZE - bitmasks_offset,
proc->vm->numa_mask, PROCESS_NUMA_MASK_BITS);
bitmasks_offset++;
numa_list = &bitmasks[bitmasks_offset];
bitmasks_offset += bitmap_scnlistprintf(numa_list,
BITMASKS_BUF_SIZE - bitmasks_offset,
proc->vm->numa_mask, PROCESS_NUMA_MASK_BITS);
bitmasks_offset++;
mcs_rwlock_reader_lock(&proc->threads_lock, &lock);
list_for_each_entry(thread_iter, &proc->threads_list,
siblings_list) {
++nr_threads;
}
mcs_rwlock_reader_unlock(&proc->threads_lock, &lock);
state = "R (running)";
if (proc->status == PS_STOPPED)
state = "T (stopped)";
else if (proc->status == PS_TRACED)
state = "T (tracing stop)";
else if (proc->status == PS_EXITED)
state = "Z (zombie)";
ans = snprintf(buf, count,
"Pid:\t%d\n"
"Uid:\t%d\t%d\t%d\t%d\n"
"Gid:\t%d\t%d\t%d\t%d\n"
"State:\t%s\n"
"VmLck:\t%9lu kB\n"
"Threads: %d\n",
proc->pid,
proc->ruid, proc->euid, proc->suid, proc->fsuid,
proc->rgid, proc->egid, proc->sgid, proc->fsgid,
state,
(lockedsize + 1023) >> 10,
nr_threads);
if (ans < 0 || ans > count ||
buf_add(&buf_top, &buf_cur, buf, ans) < 0) {
goto err;
}
ans = snprintf(buf, count, "Cpus_allowed:\t%s\n", cpu_bitmask);
if (ans < 0 || ans > count ||
buf_add(&buf_top, &buf_cur, buf, ans) < 0) {
kfree(bitmasks);
goto err;
}
ans = snprintf(buf, count, "Cpus_allowed_list:\t%s\n",
cpu_list);
if (ans < 0 || ans > count ||
buf_add(&buf_top, &buf_cur, buf, ans) < 0) {
kfree(bitmasks);
goto err;
}
ans = snprintf(buf, count, "Mems_allowed:\t%s\n",
numa_bitmask);
if (ans < 0 || ans > count ||
buf_add(&buf_top, &buf_cur, buf, ans) < 0) {
kfree(bitmasks);
goto err;
}
ans = snprintf(buf, count, "Mems_allowed_list:\t%s\n",
numa_list);
if (ans < 0 || ans > count ||
buf_add(&buf_top, &buf_cur, buf, ans) < 0) {
kfree(bitmasks);
goto err;
}
kfree(bitmasks);
ans = 0;
goto end;
}
/*
* mcos%d/PID/auxv
*/
if (strcmp(p, "auxv") == 0) {
unsigned int limit = AUXV_LEN * sizeof(unsigned long);
if (buf_add(&buf_top, &buf_cur, proc->saved_auxv, limit) < 0)
goto err;
ans = 0;
goto end;
}
/*
* mcos%d/PID/cmdline
*/
if (strcmp(p, "cmdline") == 0) {
unsigned int limit = proc->saved_cmdline_len;
if(!proc->saved_cmdline){
if (buf_add(&buf_top, &buf_cur, "", 0) < 0)
goto err;
ans = 0;
goto end;
}
if (buf_add(&buf_top, &buf_cur, proc->saved_cmdline, limit) < 0)
goto err;
ans = 0;
goto end;
}
/*
* mcos%d/PID/taks/PID/mem
*
* The offset is treated as the beginning of the virtual address area
* of the process. The count is the length of the area.
*/
if (!strcmp(p, "comm")) {
const char *comm = "exe";
if (proc->saved_cmdline) {
comm = strrchr(proc->saved_cmdline, '/');
if (comm)
comm++;
else
comm = proc->saved_cmdline;
}
ans = snprintf(buf, count, "%s\n", comm);
if (buf_add(&buf_top, &buf_cur, buf, ans) < 0)
goto err;
ans = 0;
goto end;
}
if (!strcmp(p, "stat")) {
const char *comm = "exe";
char state;
struct mcs_rwlock_node_irqsave lock;
struct thread *thread_iter;
int nr_threads = 0;
if (proc->saved_cmdline) {
comm = strrchr(proc->saved_cmdline, '/');
if (comm)
comm++;
else
comm = proc->saved_cmdline;
}
switch (thread->status & (0x3f)) {
case PS_INTERRUPTIBLE:
state = 'S';
break;
case PS_UNINTERRUPTIBLE:
state = 'D';
break;
case PS_ZOMBIE:
state = 'Z';
break;
case PS_EXITED:
state = 'X';
break;
case PS_STOPPED:
state = 'T';
break;
case PS_RUNNING:
default:
if (thread->in_syscall_offload > 0) {
state = 'S';
}
else {
state = 'R';
}
}
mcs_rwlock_reader_lock(&proc->threads_lock, &lock);
list_for_each_entry(thread_iter, &proc->threads_list,
siblings_list) {
++nr_threads;
}
mcs_rwlock_reader_unlock(&proc->threads_lock, &lock);
/*
* pid (comm) state ppid
* pgrp session tty_nr tpgid
* flags minflt cminflt majflt
* cmajflt utime stime cutime
* cstime priority nice num_threads
* itrealvalue starttime vsize rss
* rsslim startcode endcode startstack
* kstkesp kstkeip signal blocked
* sigignore sigcatch wchan nswap
* cnswap exit_signal processor rt_priority
* policy delayacct_blkio_ticks guest_time cguest_time
*/
ans = snprintf(buf, count,
"%d (%s) %c %d " // pid...
"%d %d %d %d " // pgrp...
"%u %lu %lu %lu " // flags...
"%lu %lu %lu %ld " // cmajflt...
"%ld %ld %ld %ld " // cstime...
"%ld %llu %lu %ld " // itrealvalue...
"%lu %lu %lu %lu " // rsslim...
"%lu %lu %lu %lu " // kstkesp...
"%lu %lu %lu %lu " // sigignore...
"%lu %d %d %u " // cnswap...
"%u %llu %lu %ld\n", // policy...
thread->tid, comm, state,
thread->proc->ppid_parent->pid, // pid...
thread->proc->pid, 0, 0, 0, // pgrp...
0, 0L, 0L, 0L, // flags...
0L, 0L, 0L, 0L, // cmajflt...
0L, 0L, 0L, (long int)nr_threads, // cstime...
0L, 0LL, 0L, 0L, // itrealvalue...
0L, 0L, 0L, 0L, // rsslim...
0L, 0L, 0L, 0L, // kstkesp...
0L, 0L, 0L, 0L, // sigignore...
0L, 0, thread->cpu_id, 0, // cnswap...
0, 0LL, 0L, 0L // policy...
);
if (ans < 0 || ans > count ||
buf_add(&buf_top, &buf_cur, buf, ans) < 0)
goto err;
ans = 0;
goto end;
}
if(thread)
kprintf("unsupported procfs entry: %d/task/%d/%s\n", pid, tid, p);
else
kprintf("unsupported procfs entry: %d/%s\n", pid, p);
end:
dprintf("ret: %d, eof: %d\n", ans, eof);
r->ret = ans;
r->eof = eof;
err = 0;
if (r->pbuf == PA_NULL && buf_top)
r->pbuf = virt_to_phys(buf_top);
err:
send_procfs_answer(rpacket, err);
out:
if (vbuf) {
ihk_mc_unmap_virtual(vbuf, npages);
ihk_mc_unmap_memory(NULL, pbuf, r->count);
}
if (r) {
ihk_mc_unmap_virtual(r, 1);
ihk_mc_unmap_memory(NULL, parg, sizeof(struct procfs_read));
}
if (tmp) {
ihk_mc_free_pages(tmp, 1);
}
if(proc)
release_process(proc);
if(thread)
release_thread(thread);
if(vm)
release_process_vm(vm);
return err;
}
int process_procfs_request(struct ikc_scd_packet *rpacket)
{
return _process_procfs_request(rpacket, NULL);
}
static int do_procfs_backlog(void *arg)
{
struct ikc_scd_packet *rpacket = arg;
int result = 0;
_process_procfs_request(rpacket, &result);
if (!result) {
kfree(arg);
}
return result;
}
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