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fd: Indirect fd opening states engine

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Put the states into in one place.

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Pavel Emelyanov 2012-09-13 00:34:37 +04:00
parent 1ea03bf80c
commit 845f3ee973
2 changed files with 13 additions and 36 deletions
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40
files.c
View File

@ -469,37 +469,23 @@ static int receive_fd(int pid, struct fdinfo_list_entry *fle)
return 0;
}
static char *fdinfo_states[FD_STATE_MAX] = {
[FD_STATE_PREP] = "prepare",
[FD_STATE_CREATE] = "create",
[FD_STATE_POST_CREATE] = "post_create",
[FD_STATE_RECV] = "receive",
struct fd_open_state {
char *name;
int (*cb)(int, struct fdinfo_list_entry *);
};
static struct fd_open_state states[] = {
{ "prepare", open_transport_fd, },
{ "create", open_fd, },
{ "receive", receive_fd, },
{ "post_create", post_open_fd, },
};
static int open_fdinfo(int pid, struct fdinfo_list_entry *fle, int state)
{
int ret = 0;
BUG_ON(state >= FD_STATE_MAX);
pr_info("\tRestoring fd %d (state -> %s)\n",
fle->fe->fd, fdinfo_states[state]);
switch (state) {
case FD_STATE_PREP:
ret = open_transport_fd(pid, fle);
break;
case FD_STATE_CREATE:
ret = open_fd(pid, fle);
break;
case FD_STATE_RECV:
ret = receive_fd(pid, fle);
break;
case FD_STATE_POST_CREATE:
ret = post_open_fd(pid, fle);
break;
}
return ret;
fle->fe->fd, states[state].name);
return states[state].cb(pid, fle);
}
static int open_fdinfos(int pid, struct list_head *list, int state)
@ -544,7 +530,7 @@ int prepare_fds(struct pstree_item *me)
pr_info("Opening fdinfo-s\n");
for (state = 0; state < FD_STATE_MAX; state++) {
for (state = 0; state < ARRAY_SIZE(states); state++) {
ret = open_fdinfos(me->pid.virt, &me->rst->fds, state);
if (ret)
break;

9
include/files.h
View File

@ -32,15 +32,6 @@ struct fd_parms {
.fown = FOWN_ENTRY__INIT, \
}
enum fdinfo_states {
FD_STATE_PREP, /* Create unix sockets */
FD_STATE_CREATE, /* Create and send fd */
FD_STATE_RECV, /* Receive fd */
FD_STATE_POST_CREATE, /* Execute actions, when everyone was created */
FD_STATE_MAX
};
struct file_desc;
struct fdinfo_list_entry {