[CRIU] [PATCH v4 01/41] pstree: Implement vpgid(), vsid() and vtid()
Kirill Tkhai
ktkhai at virtuozzo.com
Thu May 4 09:05:05 PDT 2017
We already vpid() function. Make it #define instead of that,
and this will allow to use it in assignments:
vpid(item) = pid;
Also, introduce vsid(), vpgid() and vtid() like it's shown below:
#define vpid(item) (item->pid->ns[0].virt)
#define vsid(item) (item->sid->ns[0].virt)
#define vpgid(item) (item->pgid->ns[0].virt)
#define vtid(item, i) (item->threads[i]->ns[0].virt)
Signed-off-by: Kirill Tkhai <ktkhai at virtuozzo.com>
---
criu/cr-dump.c | 24 ++++++++----------
criu/cr-restore.c | 10 ++++---
criu/files-reg.c | 8 +++---
criu/include/pstree.h | 8 +++---
criu/pstree.c | 66 +++++++++++++++++++++++++------------------------
criu/tty.c | 2 +
6 files changed, 58 insertions(+), 60 deletions(-)
diff --git a/criu/cr-dump.c b/criu/cr-dump.c
index 4562eeeaa..365f360f4 100644
--- a/criu/cr-dump.c
+++ b/criu/cr-dump.c
@@ -1005,7 +1005,7 @@ static int dump_task_threads(struct parasite_ctl *parasite_ctl,
for (i = 0; i < item->nr_threads; i++) {
/* Leader is already dumped */
if (item->pid->real == item->threads[i]->real) {
- item->threads[i]->ns[0].virt = vpid(item);
+ vtid(item, i) = vpid(item);
continue;
}
if (dump_task_thread(parasite_ctl, item, i))
@@ -1065,7 +1065,7 @@ static int fill_zombies_pids(struct pstree_item *item)
for (; i < nr; i++) {
if (ch[i] < 0)
continue;
- child->pid->ns[0].virt = ch[i];
+ vpid(child) = ch[i];
ch[i] = -1;
break;
}
@@ -1098,7 +1098,7 @@ static int dump_zombies(void)
if (vpid(item) < 0) {
if (!pidns)
- item->pid->ns[0].virt = item->pid->real;
+ vpid(item) = item->pid->real;
else if (root_item == item) {
pr_err("A root task is dead\n");
goto err;
@@ -1110,8 +1110,8 @@ static int dump_zombies(void)
if (parse_pid_stat(vpid(item), &pps_buf) < 0)
goto err;
- item->sid->ns[0].virt = pps_buf.sid;
- item->pgid->ns[0].virt = pps_buf.pgid;
+ vsid(item) = pps_buf.sid;
+ vpgid(item) = pps_buf.pgid;
BUG_ON(!list_empty(&item->children));
if (dump_one_zombie(item, &pps_buf) < 0)
@@ -1181,7 +1181,7 @@ static int pre_dump_one_task(struct pstree_item *item)
goto err_cure;
}
- item->pid->ns[0].virt = misc.pid;
+ vpid(item) = misc.pid;
mdc.pre_dump = true;
mdc.lazy = false;
@@ -1311,16 +1311,14 @@ static int dump_one_task(struct pstree_item *item)
goto err_cure_imgset;
}
- item->pid->ns[0].virt = misc.pid;
- item->sid->ns[0].virt = misc.sid;
- item->pgid->ns[0].virt = misc.pgid;
+ vpid(item) = misc.pid;
+ vsid(item) = misc.sid;
+ vpgid(item) = misc.pgid;
pstree_insert_pid(item->pid, item->ids->pid_ns_id);
- pr_info("sid=%d pgid=%d pid=%d\n",
- item->sid->ns[0].virt, item->pgid->ns[0].virt, vpid(item));
+ pr_info("sid=%d pgid=%d pid=%d\n", vsid(item), vpgid(item), vpid(item));
-
- if (item->sid->ns[0].virt == 0) {
+ if (vsid(item) == 0) {
pr_err("A session leader of %d(%d) is outside of its pid namespace\n",
item->pid->real, vpid(item));
goto err_cure;
diff --git a/criu/cr-restore.c b/criu/cr-restore.c
index bcc00fa12..1a99797dc 100644
--- a/criu/cr-restore.c
+++ b/criu/cr-restore.c
@@ -723,7 +723,7 @@ static int open_cores(int pid, CoreEntry *leader_core)
goto err;
for (i = 0; i < current->nr_threads; i++) {
- tpid = current->threads[i]->ns[0].virt;
+ tpid = vtid(current, i);
if (tpid == pid)
cores[i] = leader_core;
@@ -1338,7 +1338,7 @@ static void restore_sid(void)
*/
if (equal_pid(current->pid, current->sid)) {
- pr_info("Restoring %d to %d sid\n", vpid(current), current->sid->ns[0].virt);
+ pr_info("Restoring %d to %d sid\n", vpid(current), vsid(current));
sid = setsid();
if (sid != last_level_pid(current->sid)) {
pr_perror("Can't restore sid (%d)", sid);
@@ -1395,7 +1395,7 @@ static void restore_pgid(void)
pr_info("\twill call setpgid, mine pgid is %d\n", pgid);
if (setpgid(0, my_pgid) != 0) {
- pr_perror("Can't restore pgid (%d/%d->%d)", vpid(current), pgid, current->pgid->ns[0].virt);
+ pr_perror("Can't restore pgid (%d/%d->%d)", vpid(current), pgid, vpgid(current));
exit(1);
}
@@ -2800,7 +2800,7 @@ static int prepare_signals(int pid, struct task_restore_args *ta, CoreEntry *lea
for (i = 0; i < current->nr_threads; i++) {
if (!current->core[i]->thread_core->signals_p)/*backward compatibility*/
ret = open_signal_image(CR_FD_PSIGNAL,
- current->threads[i]->ns[0].virt, &siginfo_priv_nr[i]);
+ vtid(current, i), &siginfo_priv_nr[i]);
else
ret = prepare_one_signal_queue(current->core[i]->thread_core->signals_p,
&siginfo_priv_nr[i]);
@@ -3265,7 +3265,7 @@ static int sigreturn_restore(pid_t pid, struct task_restore_args *task_args, uns
struct rt_sigframe *sigframe;
k_rtsigset_t *blkset = NULL;
- thread_args[i].pid = current->threads[i]->ns[0].virt;
+ thread_args[i].pid = vtid(current, i);
thread_args[i].siginfo_n = siginfo_priv_nr[i];
thread_args[i].siginfo = task_args->siginfo;
thread_args[i].siginfo += siginfo_n;
diff --git a/criu/files-reg.c b/criu/files-reg.c
index 7c81d182a..cd30bd0d8 100644
--- a/criu/files-reg.c
+++ b/criu/files-reg.c
@@ -390,9 +390,9 @@ static int open_remap_dead_process(struct reg_file_info *rfi,
init_pstree_helper(helper);
- helper->sid->ns[0].virt = root_item->sid->ns[0].virt;
- helper->pgid->ns[0].virt = root_item->pgid->ns[0].virt;
- helper->pid->ns[0].virt = rfe->remap_id;
+ vsid(helper) = vsid(root_item);
+ vpgid(helper) = vpgid(root_item);
+ vpid(helper) = rfe->remap_id;
helper->parent = root_item;
helper->ids = root_item->ids;
list_add_tail(&helper->sibling, &root_item->children);
@@ -825,7 +825,7 @@ int dead_pid_conflict(void)
*/
item = node->item;
if (item->pid->real == item->threads[i]->real ||
- item->threads[i]->ns[0].virt != pid)
+ vtid(item, i) != pid)
continue;
}
diff --git a/criu/include/pstree.h b/criu/include/pstree.h
index 438ef939a..4035c6bbb 100644
--- a/criu/include/pstree.h
+++ b/criu/include/pstree.h
@@ -32,10 +32,10 @@ struct pstree_item {
struct ns_id *user_ns;
};
-static inline pid_t vpid(const struct pstree_item *i)
-{
- return i->pid->ns[0].virt;
-}
+#define vpid(item) (item->pid->ns[0].virt)
+#define vsid(item) (item->sid->ns[0].virt)
+#define vpgid(item) (item->pgid->ns[0].virt)
+#define vtid(item, i) (item->threads[i]->ns[0].virt)
enum {
FDS_EVENT_BIT = 0,
diff --git a/criu/pstree.c b/criu/pstree.c
index 39772e4be..b512e43b2 100644
--- a/criu/pstree.c
+++ b/criu/pstree.c
@@ -240,7 +240,7 @@ struct pstree_item *__alloc_pstree_item(bool rst, int level)
INIT_LIST_HEAD(&item->children);
INIT_LIST_HEAD(&item->sibling);
- item->pid->ns[0].virt = -1;
+ vpid(item) = -1;
item->pid->real = -1;
item->pid->state = TASK_UNDEF;
item->born_sid = -1;
@@ -326,8 +326,8 @@ int dump_pstree(struct pstree_item *root_item)
e.pid = vpid(item);
e.ppid = item->parent ? vpid(item->parent) : 0;
- e.pgid = item->pgid->ns[0].virt;
- e.sid = item->sid->ns[0].virt;
+ e.pgid = vpgid(item);
+ e.sid = vsid(item);
e.n_threads = item->nr_threads;
e.threads = xmalloc(sizeof(e.threads[0]) * e.n_threads);
@@ -335,7 +335,7 @@ int dump_pstree(struct pstree_item *root_item)
goto err;
for (i = 0; i < item->nr_threads; i++)
- e.threads[i] = item->threads[i]->ns[0].virt;
+ e.threads[i] = vtid(item, i);
ret = pb_write_one(img, &e, PB_PSTREE);
xfree(e.threads);
@@ -384,17 +384,17 @@ static int prepare_pstree_for_shell_job(void)
* Not that clever solution but at least it works.
*/
- old_sid = root_item->sid->ns[0].virt;
- old_gid = root_item->pgid->ns[0].virt;
+ old_sid = vsid(root_item);
+ old_gid = vpgid(root_item);
pr_info("Migrating process tree (GID %d->%d SID %d->%d)\n",
old_gid, current_gid, old_sid, current_sid);
for_each_pstree_item(pi) {
- if (pi->pgid->ns[0].virt == old_gid)
- pi->pgid->ns[0].virt = current_gid;
- if (pi->sid->ns[0].virt == old_sid)
- pi->sid->ns[0].virt = current_sid;
+ if (vpgid(pi) == old_gid)
+ vpgid(pi) = current_gid;
+ if (vsid(pi) == old_sid)
+ vsid(pi) = current_sid;
}
if (lookup_create_item(¤t_sid, 1, root_item->ids->pid_ns_id) == NULL)
@@ -657,13 +657,13 @@ static int read_pstree_image(pid_t *pid_max)
if (lookup_create_item((pid_t *)&e->sid, 1, ids->pid_ns_id) == NULL)
break;
- pi->pid->ns[0].virt = e->pid;
+ vpid(pi) = e->pid;
if (e->pid > *pid_max)
*pid_max = e->pid;
- pi->pgid->ns[0].virt = e->pgid;
+ vpgid(pi) = e->pgid;
if (e->pgid > *pid_max)
*pid_max = e->pgid;
- pi->sid->ns[0].virt = e->sid;
+ vsid(pi) = e->sid;
if (e->sid > *pid_max)
*pid_max = e->sid;
pi->pid->state = TASK_ALIVE;
@@ -693,7 +693,7 @@ static int read_pstree_image(pid_t *pid_max)
goto err;
pi->threads[i]->real = -1;
pi->threads[i]->level = pi->pid->level;
- pi->threads[i]->ns[0].virt = e->threads[i];
+ vtid(pi, i) = e->threads[i];
pi->threads[i]->state = TASK_THREAD;
pi->threads[i]->item = NULL;
if (i == 0)
@@ -771,7 +771,7 @@ static int prepare_pstree_ids(void)
if (equal_pid(item->sid, root_item->sid) || equal_pid(item->sid, item->pid))
continue;
- leader = pstree_item_by_virt(item->sid->ns[0].virt);
+ leader = pstree_item_by_virt(vsid(item));
BUG_ON(leader == NULL);
if (leader->pid->state != TASK_UNDEF) {
pid_t pid;
@@ -783,10 +783,10 @@ static int prepare_pstree_ids(void)
if (helper == NULL)
return -1;
- pr_info("Session leader %d\n", item->sid->ns[0].virt);
+ pr_info("Session leader %d\n", vsid(item));
- helper->sid->ns[0].virt = item->sid->ns[0].virt;
- helper->pgid->ns[0].virt = leader->pgid->ns[0].virt;
+ vsid(helper) = vsid(item);
+ vpgid(helper) = vpgid(leader);
helper->ids = leader->ids;
helper->parent = leader;
list_add(&helper->sibling, &leader->children);
@@ -795,8 +795,8 @@ static int prepare_pstree_ids(void)
vpid(helper), vpid(leader));
} else {
helper = leader;
- helper->sid->ns[0].virt = item->sid->ns[0].virt;
- helper->pgid->ns[0].virt = item->sid->ns[0].virt;
+ vsid(helper) = vsid(item);
+ vpgid(helper) = vsid(item);
helper->parent = root_item;
helper->ids = root_item->ids;
list_add_tail(&helper->sibling, &helpers);
@@ -804,7 +804,7 @@ static int prepare_pstree_ids(void)
init_pstree_helper(helper);
pr_info("Add a helper %d for restoring SID %d\n",
- vpid(helper), helper->sid->ns[0].virt);
+ vpid(helper), vsid(helper));
child = list_entry(item->sibling.prev, struct pstree_item, sibling);
item = child;
@@ -843,19 +843,19 @@ static int prepare_pstree_ids(void)
/* the task could fork a child before and after setsid() */
parent = item->parent;
while (parent && !equal_pid(parent->pid, item->sid)) {
- if (parent->born_sid != -1 && parent->born_sid != item->sid->ns[0].virt) {
+ if (parent->born_sid != -1 && parent->born_sid != vsid(item)) {
pr_err("Can't figure out which sid (%d or %d)"
"the process %d was born with\n",
- parent->born_sid, item->sid->ns[0].virt, vpid(parent));
+ parent->born_sid, vsid(item), vpid(parent));
return -1;
}
- parent->born_sid = item->sid->ns[0].virt;
- pr_info("%d was born with sid %d\n", vpid(parent), item->sid->ns[0].virt);
+ parent->born_sid = vsid(item);
+ pr_info("%d was born with sid %d\n", vpid(parent), vsid(item));
parent = parent->parent;
}
if (parent == NULL) {
- pr_err("Can't find a session leader for %d\n", item->sid->ns[0].virt);
+ pr_err("Can't find a session leader for %d\n", vsid(item));
return -1;
}
@@ -873,7 +873,7 @@ static int prepare_pstree_ids(void)
if (!item->pgid || equal_pid(item->pid, item->pgid))
continue;
- pid = pstree_pid_by_virt(item->pgid->ns[0].virt);
+ pid = pstree_pid_by_virt(vpgid(item));
if (pid->state != TASK_UNDEF) {
BUG_ON(pid->state == TASK_THREAD);
rsti(item)->pgrp_leader = pid->item;
@@ -885,22 +885,22 @@ static int prepare_pstree_ids(void)
* means we're inheriting group from the current
* task so we need to escape creating a helper here.
*/
- if (current_pgid == item->pgid->ns[0].virt)
+ if (current_pgid == vpgid(item))
continue;
helper = pid->item;
init_pstree_helper(helper);
- helper->sid->ns[0].virt = item->sid->ns[0].virt;
- helper->pgid->ns[0].virt = item->pgid->ns[0].virt;
- helper->pid->ns[0].virt = item->pgid->ns[0].virt;
+ vsid(helper) = vsid(item);
+ vpgid(helper) = vpgid(item);
+ vpid(helper) = vpgid(item);
helper->parent = item;
helper->ids = item->ids;
list_add(&helper->sibling, &item->children);
rsti(item)->pgrp_leader = helper;
pr_info("Add a helper %d for restoring PGID %d\n",
- vpid(helper), helper->pgid->ns[0].virt);
+ vpid(helper), vpgid(helper));
}
return 0;
@@ -1107,7 +1107,7 @@ int prepare_dummy_pstree(void)
bool restore_before_setsid(struct pstree_item *child)
{
- int csid = child->born_sid == -1 ? child->sid->ns[0].virt : child->born_sid;
+ int csid = child->born_sid == -1 ? vsid(child) : child->born_sid;
if (child->parent->born_sid == csid)
return true;
diff --git a/criu/tty.c b/criu/tty.c
index ade559ce0..d425c2e95 100644
--- a/criu/tty.c
+++ b/criu/tty.c
@@ -1208,7 +1208,7 @@ static struct pstree_item *find_first_sid(int sid)
struct pstree_item *item;
for_each_pstree_item(item) {
- if (item->sid->ns[0].virt == sid)
+ if (vsid(item) == sid)
return item;
}
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