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https://github.com/checkpoint-restore/criu
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a434e7f075
crtools.h is too heavy to be included in many sources Signed-off-by: Andrey Vagin <avagin@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
125 lines
2.6 KiB
C
125 lines
2.6 KiB
C
#include <unistd.h>
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#include <signal.h>
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#include <sys/signalfd.h>
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#include "compiler.h"
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#include "asm/types.h"
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#include "signalfd.h"
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#include "proc_parse.h"
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#include "fdset.h"
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#include "image.h"
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#include "util.h"
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#include "log.h"
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#include "files.h"
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#include "protobuf.h"
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#include "protobuf/signalfd.pb-c.h"
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struct signalfd_info {
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SignalfdEntry *sfe;
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struct file_desc d;
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};
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int is_signalfd_link(int lfd)
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{
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return is_anon_link_type(lfd, "[signalfd]");
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}
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struct signalfd_dump_arg {
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u32 id;
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const struct fd_parms *p;
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bool dumped;
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};
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static int dump_signalfd_entry(union fdinfo_entries *e, void *arg)
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{
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struct signalfd_dump_arg *da = arg;
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if (da->dumped) {
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pr_err("Several counters in a file?\n");
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return -1;
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}
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da->dumped = true;
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e->sfd.id = da->id;
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e->sfd.flags = da->p->flags;
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e->sfd.fown = (FownEntry *)&da->p->fown;
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return pb_write_one(fdset_fd(glob_fdset, CR_FD_SIGNALFD),
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&e->sfd, PB_SIGNALFD);
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}
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static int dump_one_signalfd(int lfd, u32 id, const struct fd_parms *p)
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{
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struct signalfd_dump_arg da = { .id = id, .p = p, };
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return parse_fdinfo(lfd, FD_TYPES__SIGNALFD, dump_signalfd_entry, &da);
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}
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const struct fdtype_ops signalfd_dump_ops = {
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.type = FD_TYPES__SIGNALFD,
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.dump = dump_one_signalfd,
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};
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static void sigset_fill(sigset_t *to, unsigned long long from)
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{
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int sig;
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pr_info("\tCalculating sigmask for %Lx\n", from);
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sigemptyset(to);
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for (sig = 1; sig < NSIG; sig++)
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if (from & (1ULL << (sig - 1))) {
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pr_debug("\t\tAdd %d signal to mask\n", sig);
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sigaddset(to, sig);
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}
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}
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static int signalfd_open(struct file_desc *d)
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{
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struct signalfd_info *info;
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int tmp;
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sigset_t mask;
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info = container_of(d, struct signalfd_info, d);
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pr_info("Restoring signalfd %#x\n", info->sfe->id);
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sigset_fill(&mask, info->sfe->sigmask);
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tmp = signalfd(-1, &mask, 0);
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if (tmp < 0) {
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pr_perror("Can't create signalfd %#08x", info->sfe->id);
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return -1;
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}
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if (rst_file_params(tmp, info->sfe->fown, info->sfe->flags)) {
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pr_perror("Can't restore params on signalfd %#08x",
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info->sfe->id);
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goto err_close;
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}
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return tmp;
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err_close:
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close(tmp);
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return -1;
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}
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static struct file_desc_ops signalfd_desc_ops = {
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.type = FD_TYPES__SIGNALFD,
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.open = signalfd_open,
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};
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static int collect_one_sigfd(void *o, ProtobufCMessage *msg)
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{
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struct signalfd_info *info = o;
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info->sfe = pb_msg(msg, SignalfdEntry);
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return file_desc_add(&info->d, info->sfe->id, &signalfd_desc_ops);
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}
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struct collect_image_info signalfd_cinfo = {
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.fd_type = CR_FD_SIGNALFD,
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.pb_type = PB_SIGNALFD,
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.priv_size = sizeof(struct signalfd_info),
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.collect = collect_one_sigfd,
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.flags = COLLECT_OPTIONAL,
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};
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