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ipc_ns.c
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ipc_ns.c
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#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/wait.h>
#include <sys/msg.h>
#include <sys/sem.h>
#include <sys/shm.h>
#include "util.h"
#include "crtools.h"
#include "syscall.h"
#include "namespaces.h"
#include "sysctl.h"
#include "ipc_ns.h"
#include "protobuf.h"
#include "protobuf/ipc-var.pb-c.h"
#include "protobuf/ipc-shm.pb-c.h"
#include "protobuf/ipc-sem.pb-c.h"
#include "protobuf/ipc-msg.pb-c.h"
#if defined (__GLIBC__) && __GLIBC__ >= 2
#define KEY __key
#else
#define KEY key
#endif
#ifndef MSGMAX
#define MSGMAX 8192
#endif
#ifndef MSG_COPY
#define MSG_COPY 040000
#endif
static void pr_ipc_desc_entry(unsigned int loglevel, const IpcDescEntry *desc)
{
print_on_level(loglevel, "id: %-10d key: 0x%08x ", desc->id, desc->key);
print_on_level(loglevel, "uid: %-10d gid: %-10d ", desc->uid, desc->gid);
print_on_level(loglevel, "cuid: %-10d cgid: %-10d ", desc->cuid, desc->cgid);
print_on_level(loglevel, "mode: %-10o ", desc->mode);
}
static void fill_ipc_desc(int id, IpcDescEntry *desc, const struct ipc_perm *ipcp)
{
desc->id = id;
desc->key = ipcp->KEY;
desc->uid = ipcp->uid;
desc->gid = ipcp->gid;
desc->cuid = ipcp->cuid;
desc->cgid = ipcp->cgid;
desc->mode = ipcp->mode;
}
static void pr_ipc_sem_array(unsigned int loglevel, int nr, u16 *values)
{
while (nr--)
print_on_level(loglevel, " %-5d", values[nr]);
print_on_level(loglevel, "\n");
}
#define pr_info_ipc_sem_array(nr, values) pr_ipc_sem_array(LOG_INFO, nr, values)
#define pr_msg_ipc_sem_array(nr, values) pr_ipc_sem_array(LOG_MSG, nr, values)
static void pr_info_ipc_sem_entry(const IpcSemEntry *sem)
{
pr_ipc_desc_entry(LOG_INFO, sem->desc);
print_on_level(LOG_INFO, "nsems: %-10d\n", sem->nsems);
}
static int dump_ipc_sem_set(int fd, const IpcSemEntry *sem)
{
int ret, size;
u16 *values;
size = sizeof(u16) * sem->nsems;
values = xmalloc(size);
if (values == NULL) {
pr_err("Failed to allocate memory for semaphore set values\n");
ret = -ENOMEM;
goto out;
}
ret = semctl(sem->desc->id, 0, GETALL, values);
if (ret < 0) {
pr_perror("Failed to get semaphore set values");
ret = -errno;
goto out;
}
pr_info_ipc_sem_array(sem->nsems, values);
ret = write_img_buf(fd, values, round_up(size, sizeof(u64)));
if (ret < 0) {
pr_err("Failed to write IPC message data\n");
goto out;
}
out:
xfree(values);
return ret;
}
static int dump_ipc_sem_desc(int fd, int id, const struct semid_ds *ds)
{
IpcSemEntry sem = IPC_SEM_ENTRY__INIT;
IpcDescEntry desc = IPC_DESC_ENTRY__INIT;
int ret;
sem.desc = &desc;
sem.nsems = ds->sem_nsems;
fill_ipc_desc(id, sem.desc, &ds->sem_perm);
pr_info_ipc_sem_entry(&sem);
ret = pb_write_one(fd, &sem, PB_IPCNS_SEM);
if (ret < 0) {
pr_err("Failed to write IPC semaphores set\n");
return ret;
}
return dump_ipc_sem_set(fd, &sem);
}
static int dump_ipc_sem(int fd)
{
int i, maxid;
struct seminfo info;
int slot;
maxid = semctl(0, 0, SEM_INFO, &info);
if (maxid < 0) {
pr_perror("semctl failed");
return -errno;
}
pr_info("IPC semaphore sets: %d\n", info.semusz);
for (i = 0, slot = 0; i <= maxid; i++) {
struct semid_ds ds;
int id, ret;
id = semctl(i, 0, SEM_STAT, &ds);
if (id < 0) {
if (errno == EINVAL)
continue;
pr_perror("Failed to get stats for IPC semaphore set");
break;
}
ret = dump_ipc_sem_desc(fd, id, &ds);
if (!ret)
slot++;
}
if (slot != info.semusz) {
pr_err("Failed to collect %d (only %d succeeded)\n", info.semusz, slot);
return -EFAULT;
}
return info.semusz;
}
static void pr_info_ipc_msg(int nr, const IpcMsg *msg)
{
print_on_level(LOG_INFO, " %-5d: type: %-20"PRId64" size: %-10d\n",
nr++, msg->mtype, msg->msize);
}
static void pr_info_ipc_msg_entry(const IpcMsgEntry *msg)
{
pr_ipc_desc_entry(LOG_INFO, msg->desc);
print_on_level(LOG_INFO, "qbytes: %-10d qnum: %-10d\n",
msg->qbytes, msg->qnum);
}
static int dump_ipc_msg_queue_messages(int fd, const IpcMsgEntry *msq,
unsigned int msg_nr)
{
struct msgbuf *message = NULL;
unsigned int msgmax;
int ret, msg_cnt = 0;
struct sysctl_req req[] = {
{ "kernel/msgmax", &msgmax, CTL_U32 },
{ },
};
ret = sysctl_op(req, CTL_READ);
if (ret < 0) {
pr_err("Failed to read max IPC message size\n");
goto err;
}
msgmax += sizeof(struct msgbuf);
message = xmalloc(msgmax);
if (message == NULL) {
pr_err("Failed to allocate memory for IPC message\n");
return -ENOMEM;
}
for (msg_cnt = 0; msg_cnt < msg_nr; msg_cnt++) {
IpcMsg msg = IPC_MSG__INIT;
ret = msgrcv(msq->desc->id, message, msgmax, msg_cnt, IPC_NOWAIT | MSG_COPY);
if (ret < 0) {
pr_perror("Failed to copy IPC message");
goto err;
}
msg.msize = ret;
msg.mtype = message->mtype;
pr_info_ipc_msg(msg_cnt, &msg);
ret = pb_write_one(fd, &msg, PB_IPCNS_MSG);
if (ret < 0) {
pr_err("Failed to write IPC message header\n");
break;
}
ret = write_img_buf(fd, message->mtext, round_up(msg.msize, sizeof(u64)));
if (ret < 0) {
pr_err("Failed to write IPC message data\n");
break;
}
}
ret = 0;
err:
xfree(message);
return ret;
}
static int dump_ipc_msg_queue(int fd, int id, const struct msqid_ds *ds)
{
IpcMsgEntry msg = IPC_MSG_ENTRY__INIT;
IpcDescEntry desc = IPC_DESC_ENTRY__INIT;
int ret;
msg.desc = &desc;
fill_ipc_desc(id, msg.desc, &ds->msg_perm);
msg.qbytes = ds->msg_qbytes;
msg.qnum = ds->msg_qnum;
pr_info_ipc_msg_entry(&msg);
ret = pb_write_one(fd, &msg, PB_IPCNS_MSG_ENT);
if (ret < 0) {
pr_err("Failed to write IPC message queue\n");
return ret;
}
return dump_ipc_msg_queue_messages(fd, &msg, ds->msg_qnum);
}
static int dump_ipc_msg(int fd)
{
int i, maxid;
struct msginfo info;
int slot;
maxid = msgctl(0, MSG_INFO, (struct msqid_ds *)&info);
if (maxid < 0) {
pr_perror("msgctl failed");
return -errno;
}
pr_info("IPC message queues: %d\n", info.msgpool);
for (i = 0, slot = 0; i <= maxid; i++) {
struct msqid_ds ds;
int id, ret;
id = msgctl(i, MSG_STAT, &ds);
if (id < 0) {
if (errno == EINVAL)
continue;
pr_perror("Failed to get stats for IPC message queue");
break;
}
ret = dump_ipc_msg_queue(fd, id, &ds);
if (!ret)
slot++;
}
if (slot != info.msgpool) {
pr_err("Failed to collect %d message queues (only %d succeeded)\n", info.msgpool, slot);
return -EFAULT;
}
return info.msgpool;
}
static void pr_info_ipc_shm(const IpcShmEntry *shm)
{
pr_ipc_desc_entry(LOG_INFO, shm->desc);
print_on_level(LOG_INFO, "size: %-10"PRIu64"\n", shm->size);
}
static int ipc_sysctl_req(IpcVarEntry *e, int op)
{
struct sysctl_req req[] = {
{ "kernel/sem", e->sem_ctls, CTL_U32A(e->n_sem_ctls) },
{ "kernel/msgmax", &e->msg_ctlmax, CTL_U32 },
{ "kernel/msgmnb", &e->msg_ctlmnb, CTL_U32 },
{ "kernel/msgmni", &e->msg_ctlmni, CTL_U32 },
{ "kernel/auto_msgmni", &e->auto_msgmni, CTL_U32 },
{ "kernel/shmmax", &e->shm_ctlmax, CTL_U64 },
{ "kernel/shmall", &e->shm_ctlall, CTL_U64 },
{ "kernel/shmmni", &e->shm_ctlmni, CTL_U32 },
{ "kernel/shm_rmid_forced", &e->shm_rmid_forced, CTL_U32 },
{ },
};
struct sysctl_req req_mq[] = {
{ "fs/mqueue/queues_max", &e->mq_queues_max, CTL_U32 },
{ "fs/mqueue/msg_max", &e->mq_msg_max, CTL_U32 },
{ "fs/mqueue/msgsize_max", &e->mq_msgsize_max, CTL_U32 },
{ },
};
int ret;
ret = sysctl_op(req, op);
if (ret)
return ret;
if (access("/proc/sys/fs/mqueue", X_OK)) {
pr_info("Mqueue sysctls are missing\n");
return 0;
}
return sysctl_op(req_mq, op);
}
/*
* TODO: Function below should be later improved to locate and dump only dirty
* pages via updated sys_mincore().
*/
static int dump_ipc_shm_pages(int fd, const IpcShmEntry *shm)
{
void *data;
int ret;
data = shmat(shm->desc->id, NULL, SHM_RDONLY);
if (data == (void *)-1) {
pr_perror("Failed to attach IPC shared memory");
return -errno;
}
ret = write_img_buf(fd, data, round_up(shm->size, sizeof(u32)));
if (ret < 0) {
pr_err("Failed to write IPC shared memory data\n");
return ret;
}
if (shmdt(data)) {
pr_perror("Failed to detach IPC shared memory");
return -errno;
}
return 0;
}
static int dump_ipc_shm_seg(int fd, int id, const struct shmid_ds *ds)
{
IpcShmEntry shm = IPC_SHM_ENTRY__INIT;
IpcDescEntry desc = IPC_DESC_ENTRY__INIT;
int ret;
shm.desc = &desc;
shm.size = ds->shm_segsz;
fill_ipc_desc(id, shm.desc, &ds->shm_perm);
pr_info_ipc_shm(&shm);
ret = pb_write_one(fd, &shm, PB_IPCNS_SHM);
if (ret < 0) {
pr_err("Failed to write IPC shared memory segment\n");
return ret;
}
return dump_ipc_shm_pages(fd, &shm);
}
static int dump_ipc_shm(int fd)
{
int i, maxid, slot;
struct shm_info info;
maxid = shmctl(0, SHM_INFO, (void *)&info);
if (maxid < 0) {
pr_perror("shmctl(SHM_INFO) failed");
return -errno;
}
pr_info("IPC shared memory segments: %d\n", info.used_ids);
for (i = 0, slot = 0; i <= maxid; i++) {
struct shmid_ds ds;
int id, ret;
id = shmctl(i, SHM_STAT, &ds);
if (id < 0) {
if (errno == EINVAL)
continue;
pr_perror("Failed to get stats for IPC shared memory");
break;
}
ret = dump_ipc_shm_seg(fd, id, &ds);
if (ret < 0)
return ret;
slot++;
}
if (slot != info.used_ids) {
pr_err("Failed to collect %d (only %d succeeded)\n",
info.used_ids, slot);
return -EFAULT;
}
return 0;
}
static int dump_ipc_var(int fd)
{
IpcVarEntry var = IPC_VAR_ENTRY__INIT;
int ret = -1;
var.n_sem_ctls = 4;
var.sem_ctls = xmalloc(pb_repeated_size(&var, sem_ctls));
if (!var.sem_ctls)
goto err;
ret = ipc_sysctl_req(&var, CTL_READ);
if (ret < 0) {
pr_err("Failed to read IPC variables\n");
goto err;
}
ret = pb_write_one(fd, &var, PB_IPCNS_VAR);
if (ret < 0) {
pr_err("Failed to write IPC variables\n");
goto err;
}
err:
xfree(var.sem_ctls);
return ret;
}
static int dump_ipc_data(const struct cr_fdset *fdset)
{
int ret;
ret = dump_ipc_var(fdset_fd(fdset, CR_FD_IPCNS_VAR));
if (ret < 0)
return ret;
ret = dump_ipc_shm(fdset_fd(fdset, CR_FD_IPCNS_SHM));
if (ret < 0)
return ret;
ret = dump_ipc_msg(fdset_fd(fdset, CR_FD_IPCNS_MSG));
if (ret < 0)
return ret;
ret = dump_ipc_sem(fdset_fd(fdset, CR_FD_IPCNS_SEM));
if (ret < 0)
return ret;
return 0;
}
int dump_ipc_ns(int ns_pid, const struct cr_fdset *fdset)
{
int ret;
ret = switch_ns(ns_pid, &ipc_ns_desc, NULL);
if (ret < 0)
return ret;
ret = dump_ipc_data(fdset);
if (ret < 0) {
pr_err("Failed to write IPC namespace data\n");
return ret;
}
return 0;
}
static void ipc_sem_handler(int fd, void *obj)
{
IpcSemEntry *e = obj;
u16 *values;
int size;
pr_msg("\n");
size = sizeof(u16) * e->nsems;
values = xmalloc(size);
if (values == NULL)
return;
if (read_img_buf(fd, values, round_up(size, sizeof(u64))) <= 0) {
xfree(values);
return;
}
pr_msg_ipc_sem_array(e->nsems, values);
}
void show_ipc_sem(int fd)
{
pb_show_plain_payload(fd, PB_IPCNS_SEM, ipc_sem_handler);
}
static void ipc_msg_data_handler(int fd, void *obj)
{
IpcMsg *e = obj;
print_image_data(fd, round_up(e->msize, sizeof(u64)), opts.show_pages_content);
}
static void ipc_msg_handler(int fd, void *obj)
{
IpcMsgEntry *e = obj;
int msg_nr = 0;
pr_msg("\n");
while (msg_nr++ < e->qnum)
pb_show_plain_payload(fd, PB_IPCNS_MSG, ipc_msg_data_handler);
}
void show_ipc_msg(int fd)
{
pb_show_plain_payload(fd, PB_IPCNS_MSG_ENT, ipc_msg_handler);
}
static void ipc_shm_handler(int fd, void *obj)
{
IpcShmEntry *e = obj;
print_image_data(fd, round_up(e->size, sizeof(u32)), opts.show_pages_content);
}
void show_ipc_shm(int fd)
{
pb_show_plain_payload(fd, PB_IPCNS_SHM, ipc_shm_handler);
}
void show_ipc_var(int fd)
{
pb_show_vertical(fd, PB_IPCNS_VAR);
}
static int prepare_ipc_sem_values(int fd, const IpcSemEntry *sem)
{
int ret, size;
u16 *values;
size = sizeof(u16) * sem->nsems;
values = xmalloc(size);
if (values == NULL) {
pr_err("Failed to allocate memory for semaphores set values\n");
ret = -ENOMEM;
goto out;
}
ret = read_img_buf(fd, values, round_up(size, sizeof(u64)));
if (ret < 0) {
pr_err("Failed to allocate memory for semaphores set values\n");
ret = -ENOMEM;
goto out;
}
pr_info_ipc_sem_array(sem->nsems, values);
ret = semctl(sem->desc->id, 0, SETALL, values);
if (ret < 0) {
pr_perror("Failed to set semaphores set values");
ret = -errno;
}
out:
xfree(values);
return ret;
}
static int prepare_ipc_sem_desc(int fd, const IpcSemEntry *sem)
{
int ret, id;
struct sysctl_req req[] = {
{ "kernel/sem_next_id", &sem->desc->id, CTL_U32 },
{ },
};
struct semid_ds semid;
ret = sysctl_op(req, CTL_WRITE);
if (ret < 0) {
pr_err("Failed to set desired IPC sem ID\n");
return ret;
}
id = semget(sem->desc->key, sem->nsems,
sem->desc->mode | IPC_CREAT | IPC_EXCL);
if (id == -1) {
pr_perror("Failed to create sem set");
return -errno;
}
if (id != sem->desc->id) {
pr_err("Failed to restore sem id (%d instead of %d)\n",
id, sem->desc->id);
return -EFAULT;
}
ret = semctl(id, sem->nsems, IPC_STAT, &semid);
if (ret == -1) {
pr_err("Failed to get sem stat structure\n");
return -EFAULT;
}
semid.sem_perm.uid = sem->desc->uid;
semid.sem_perm.gid = sem->desc->gid;
ret = semctl(id, sem->nsems, IPC_SET, &semid);
if (ret == -1) {
pr_err("Failed to set sem uid and gid\n");
return -EFAULT;
}
ret = prepare_ipc_sem_values(fd, sem);
if (ret < 0) {
pr_err("Failed to update sem pages\n");
return ret;
}
return 0;
}
static int prepare_ipc_sem(int pid)
{
int fd, ret;
pr_info("Restoring IPC semaphores sets\n");
fd = open_image(CR_FD_IPCNS_SEM, O_RSTR, pid);
if (fd < 0)
return -1;
while (1) {
IpcSemEntry *sem;
ret = pb_read_one_eof(fd, &sem, PB_IPCNS_SEM);
if (ret < 0) {
ret = -EIO;
goto err;
}
if (ret == 0)
break;
pr_info_ipc_sem_entry(sem);
ret = prepare_ipc_sem_desc(fd, sem);
ipc_sem_entry__free_unpacked(sem, NULL);
if (ret < 0) {
pr_err("Failed to prepare semaphores set\n");
goto err;
}
}
return close_safe(&fd);
err:
close_safe(&fd);
return ret;
}
static int prepare_ipc_msg_queue_messages(int fd, const IpcMsgEntry *msq)
{
IpcMsg *msg = NULL;
int msg_nr = 0;
int ret = 0;
while (msg_nr < msq->qnum) {
struct msgbuf {
long mtype;
char mtext[MSGMAX];
} data;
ret = pb_read_one(fd, &msg, PB_IPCNS_MSG);
if (ret <= 0)
return -EIO;
pr_info_ipc_msg(msg_nr, msg);
if (msg->msize > MSGMAX) {
ret = -1;
pr_err("Unsupported message size: %d (MAX: %d)\n",
msg->msize, MSGMAX);
break;
}
ret = read_img_buf(fd, data.mtext, round_up(msg->msize, sizeof(u64)));
if (ret < 0) {
pr_err("Failed to read IPC message data\n");
break;
}
data.mtype = msg->mtype;
ret = msgsnd(msq->desc->id, &data, msg->msize, IPC_NOWAIT);
if (ret < 0) {
pr_perror("Failed to send IPC message");
ret = -errno;
break;
}
msg_nr++;
}
if (msg)
ipc_msg__free_unpacked(msg, NULL);
return ret;
}
static int prepare_ipc_msg_queue(int fd, const IpcMsgEntry *msq)
{
int ret, id;
struct sysctl_req req[] = {
{ "kernel/msg_next_id", &msq->desc->id, CTL_U32 },
{ },
};
struct msqid_ds msqid;
ret = sysctl_op(req, CTL_WRITE);
if (ret < 0) {
pr_err("Failed to set desired IPC msg ID\n");
return ret;
}
id = msgget(msq->desc->key, msq->desc->mode | IPC_CREAT | IPC_EXCL);
if (id == -1) {
pr_perror("Failed to create msg set");
return -errno;
}
if (id != msq->desc->id) {
pr_err("Failed to restore msg id (%d instead of %d)\n",
id, msq->desc->id);
return -EFAULT;
}
ret = msgctl(id, IPC_STAT, &msqid);
if (ret == -1) {
pr_err("Failed to get msq stat structure\n");
return -EFAULT;
}
msqid.msg_perm.uid = msq->desc->uid;
msqid.msg_perm.gid = msq->desc->gid;
ret = msgctl(id, IPC_SET, &msqid);
if (ret == -1) {
pr_err("Failed to set msq queue uid and gid\n");
return -EFAULT;
}
ret = prepare_ipc_msg_queue_messages(fd, msq);
if (ret < 0) {
pr_err("Failed to update message queue messages\n");
return ret;
}
return 0;
}
static int prepare_ipc_msg(int pid)
{
int fd, ret;
pr_info("Restoring IPC message queues\n");
fd = open_image(CR_FD_IPCNS_MSG, O_RSTR, pid);
if (fd < 0)
return -1;
while (1) {
IpcMsgEntry *msq;
ret = pb_read_one_eof(fd, &msq, PB_IPCNS_MSG_ENT);
if (ret < 0) {
pr_err("Failed to read IPC messages queue\n");
ret = -EIO;
goto err;
}
if (ret == 0)
break;
pr_info_ipc_msg_entry(msq);
ret = prepare_ipc_msg_queue(fd, msq);
ipc_msg_entry__free_unpacked(msq, NULL);
if (ret < 0) {
pr_err("Failed to prepare messages queue\n");
goto err;
}
}
return close_safe(&fd);
err:
close_safe(&fd);
return ret;
}
static int prepare_ipc_shm_pages(int fd, const IpcShmEntry *shm)
{
int ret;
void *data;
data = shmat(shm->desc->id, NULL, 0);
if (data == (void *)-1) {
pr_perror("Failed to attach IPC shared memory");
return -errno;
}
ret = read_img_buf(fd, data, round_up(shm->size, sizeof(u32)));
if (ret < 0) {
pr_err("Failed to read IPC shared memory data\n");
return ret;
}
if (shmdt(data)) {
pr_perror("Failed to detach IPC shared memory");
return -errno;
}
return 0;
}
static int prepare_ipc_shm_seg(int fd, const IpcShmEntry *shm)
{
int ret, id;
struct sysctl_req req[] = {
{ "kernel/shm_next_id", &shm->desc->id, CTL_U32 },
{ },
};
struct shmid_ds shmid;
ret = sysctl_op(req, CTL_WRITE);
if (ret < 0) {
pr_err("Failed to set desired IPC shm ID\n");
return ret;
}
id = shmget(shm->desc->key, shm->size,
shm->desc->mode | IPC_CREAT | IPC_EXCL);
if (id == -1) {
pr_perror("Failed to create shm set");
return -errno;
}
if (id != shm->desc->id) {
pr_err("Failed to restore shm id (%d instead of %d)\n",
id, shm->desc->id);
return -EFAULT;
}
ret = shmctl(id, IPC_STAT, &shmid);
if (ret == -1) {
pr_err("Failed to get shm stat structure\n");
return -EFAULT;
}
shmid.shm_perm.uid = shm->desc->uid;
shmid.shm_perm.gid = shm->desc->gid;
ret = shmctl(id, IPC_SET, &shmid);
if (ret == -1) {
pr_err("Failed to set shm uid and gid\n");
return -EFAULT;
}
ret = prepare_ipc_shm_pages(fd, shm);
if (ret < 0) {
pr_err("Failed to update shm pages\n");
return ret;
}
return 0;
}
static int prepare_ipc_shm(int pid)
{
int fd, ret;
pr_info("Restoring IPC shared memory\n");
fd = open_image(CR_FD_IPCNS_SHM, O_RSTR, pid);
if (fd < 0)
return -1;
while (1) {
IpcShmEntry *shm;
ret = pb_read_one_eof(fd, &shm, PB_IPCNS_SHM);
if (ret < 0) {
pr_err("Failed to read IPC shared memory segment\n");
ret = -EIO;
goto err;
}
if (ret == 0)
break;
pr_info_ipc_shm(shm);
ret = prepare_ipc_shm_seg(fd, shm);
ipc_shm_entry__free_unpacked(shm, NULL);
if (ret < 0) {
pr_err("Failed to prepare shm segment\n");
goto err;
}
}
return close_safe(&fd);
err:
close_safe(&fd);
return ret;
}
static int prepare_ipc_var(int pid)
{
int fd, ret;
IpcVarEntry *var;
pr_info("Restoring IPC variables\n");
fd = open_image(CR_FD_IPCNS_VAR, O_RSTR, pid);
if (fd < 0)
return -1;
ret = pb_read_one(fd, &var, PB_IPCNS_VAR);
close_safe(&fd);
if (ret <= 0) {
pr_err("Failed to read IPC namespace variables\n");
return -EFAULT;
}
ipc_sysctl_req(var, CTL_PRINT);
ret = ipc_sysctl_req(var, CTL_WRITE);
ipc_var_entry__free_unpacked(var, NULL);
if (ret < 0) {
pr_err("Failed to prepare IPC namespace variables\n");
return -EFAULT;
}
return 0;
}
int prepare_ipc_ns(int pid)
{
int ret;
pr_info("Restoring IPC namespace\n");
ret = prepare_ipc_var(pid);
if (ret < 0)
return ret;
ret = prepare_ipc_shm(pid);
if (ret < 0)
return ret;
ret = prepare_ipc_msg(pid);
if (ret < 0)
return ret;
ret = prepare_ipc_sem(pid);
if (ret < 0)
return ret;
return 0;
}
struct ns_desc ipc_ns_desc = NS_DESC_ENTRY(CLONE_NEWIPC, "ipc");