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Cyrill Gorcunov 3146f58317 plugin: Rework plugins API, v2 
Here we define new api to be used in plugins.

 - Plugin should provide a descriptor with help of
   CR_PLUGIN_REGISTER macro, or in case if plugin require
   no init/exit functions -- with CR_PLUGIN_REGISTER_DUMMY.

 - Plugin should define a plugin hook with help of
   CR_PLUGIN_REGISTER_HOOK macro.

 - Now init/exit functions of plugins takes @stage
   argument which tells plugin which stage of criu
   it's been called on dump/restore. For exit it
   also takes @ret which allows plugin to know if
   something went wrong and it needs to cleanup
   own resources.

The idea behind is to not limit plugins authors with names
of functions they might need to use for particular hook.

Such new API deprecates olds plugins structure but to keep
backward compatibility we will provide a tiny layer of
additional code to support old plugins for at least a couple
of release cycles.

For example a trivial plugin might look like

 | #include <sys/types.h>
 | #include <sys/stat.h>
 | #include <fcntl.h>
 | #include <libgen.h>
 | #include <errno.h>
 |
 | #include <sys/socket.h>
 | #include <linux/un.h>
 |
 | #include <stdio.h>
 | #include <stdlib.h>
 | #include <string.h>
 | #include <unistd.h>
 |
 | #include "criu-plugin.h"
 | #include "criu-log.h"
 |
 | static int dump_ext_file(int fd, int id)
 | {
 |	pr_info("dump_ext_file: fd %d id %d\n", fd, id);
 |	return 0;
 | }
 |
 | CR_PLUGIN_REGISTER_DUMMY("trivial")
 | CR_PLUGIN_REGISTER_HOOK(CR_PLUGIN_HOOK__DUMP_EXT_FILE, dump_ext_file)

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Andrew Vagin <avagin@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2014-09-03 20:48:36 +04:00
..
asm-generic cr: collect short integer aliases in the single place 2014-04-08 15:35:46 +04:00
bug.h bug: Include <stdbool.h> 2014-02-21 16:27:16 +04:00
cgroup.h cg: add --cgroup-root option 2014-08-19 12:58:36 +04:00
compiler.h include/compiler.h: Cleanup 2013-02-15 17:34:38 +04:00
config-base.h config-base: Add F_SETPIPE_SZ/F_GETPIPE_SZ 2014-02-18 12:53:09 +04:00
cpu.h cpu: Make cpu routines being per-acrh 2013-02-18 18:42:08 +04:00
cr-service-const.h service: move constants to cr-service-const.h 2013-12-18 14:26:10 +04:00
cr-service.h crtools: Add internal "swrk" action 2014-06-27 14:24:33 +04:00
cr-show.h headers: Add \Newline-s for readability sake 2013-11-15 17:00:14 +04:00
cr_options.h Use --root instead of --aufs-root 2014-08-27 14:31:40 +04:00
criu-log.h log: Add pr_warn_once helper 2014-02-28 13:34:29 +04:00
criu-plugin.h plugin: Rework plugins API, v2 2014-09-03 20:48:36 +04:00
crtools.h security: check additional groups,v5 2014-08-06 10:20:27 +04:00
err.h headers: Add err.h header 2013-04-02 20:27:51 +04:00
errno.h headers: Move ERESTART codes to errno.h 2013-11-14 22:22:21 +04:00
eventfd.h anon-inode: Don't readlink fd/fd multiple times 2014-02-02 22:14:29 +04:00
eventpoll.h anon-inode: Don't readlink fd/fd multiple times 2014-02-02 22:14:29 +04:00
fcntl.h fsnotify: Open handle with O_PATH, v2 2014-02-25 23:38:35 +04:00
fdset.h headers: Add extern specificator to functions 2013-11-15 17:00:58 +04:00
fifo.h collect: Shorten common images collecting code 2013-08-21 03:52:18 +04:00
file-ids.h files-ids: generate id-s accoding with mnt_id, st->st_dev and st->st_ino 2014-04-21 22:39:28 +04:00
file-lock.h locks: Don't dump locks in per-task manner (v3) 2014-09-02 17:44:46 +04:00
files-reg.h link-remap: open link-remap files from correct mountpoints (v3) 2014-08-06 19:14:16 +04:00
files.h files: Split fs restore into prepare and restore 2014-07-04 15:09:03 +04:00
fs-magic.h Added AUFS support. 2014-08-21 18:35:22 +04:00
fsnotify.h fsnotify: parse_fdinfo_pid_s() returns allocated object for inotify wd (v2) 2014-09-02 16:07:43 +04:00
image-desc.h image: mark CR_FD_SIGNAL and CR_FD_PSIGNAL as obsoleted and don't create signal-s*.img, v2 2014-08-19 13:09:49 +04:00
image.h vdso: image -- Add VMA_AREA_VVAR flag 2014-06-24 22:48:40 +04:00
inet_diag.h headers: Unify include guards (in comments) and a few fixes 2012-12-25 22:40:24 +04:00
ipc_ns.h crtools: don't include crtools.h in other headers 2013-11-06 18:17:38 +04:00
irmap.h irmap: Introduce irmap on-disk cache 2014-01-30 16:20:16 +04:00
kcmp-ids.h headers: Add extern specificator to functions 2013-11-15 17:00:58 +04:00
kcmp.h headers: Move kcmp_type to kcmp.h 2013-11-14 22:13:59 +04:00
kerndat.h mount: detect the newinstance option for devpts (v2) 2014-04-08 15:32:35 +04:00
libnetlink.h headers: Unify include guards (in comments) and a few fixes 2012-12-25 22:40:24 +04:00
list.h criu: Several formatting fixes 2014-01-14 09:33:19 +04:00
lock.h atomic: Use atomic_read instead of atomic_get 2013-08-16 19:37:06 +04:00
log.h log: Include inttypes.h for PRI helpers 2014-04-25 13:23:55 +04:00
magic.h timerfd: Add protobuf entries into the image 2014-08-06 19:18:34 +04:00
mem.h mem: Move shmem preparation routine and rename 2014-02-03 23:34:12 +04:00
mman.h headers: Move MADV definitions to own mman.h 2013-11-14 22:48:30 +04:00
mount.h stat: Pass namespace into phys_stat_resolve_dev, not mnt tree 2014-08-06 10:57:27 +04:00
namespaces.h mnt: Factor out mntns nsid creation on restore 2014-04-23 13:22:12 +04:00
net.h rpc: Add ability to specify veth pairs (--veth-pair option) 2014-02-12 00:33:02 +04:00
netfilter.h headers: Add extern specificator to functions 2013-11-15 17:00:58 +04:00
netlink_diag.h headers: Add missing __CR_ at last endif 2013-11-15 16:59:57 +04:00
packet_diag.h headers: Unify include guards (in comments) and a few fixes 2012-12-25 22:40:24 +04:00
page-pipe.h page-pipe: split dumping memory on chunks (v3) 2014-02-10 15:06:39 +04:00
page-read.h iov: Add iovec2pagemap() helper 2014-06-20 16:35:52 +04:00
page-xfer.h v3 deduplication: add auto-dedup local 2013-12-18 14:52:04 +04:00
pagemap-cache.h pagemap-cache: Use page.h helpers 2014-02-21 16:29:41 +04:00
parasite-syscall.h vdso: Put CONFIG_VDSO where needed 2014-05-27 23:40:07 +04:00
parasite.h Dump capabilities from the parasite 2014-08-15 23:10:44 +04:00
pid.h headers: Add missing __CR_ at last endif 2013-11-15 16:59:57 +04:00
pipes.h collect: Shorten common images collecting code 2013-08-21 03:52:18 +04:00
plugin.h plugin: Rework plugins API, v2 2014-09-03 20:48:36 +04:00
posix-timer.h posix-timers: Helper for freeing proc parsed data 2014-04-17 12:01:02 +04:00
prctl.h Dump capabilities from the parasite 2014-08-15 23:10:44 +04:00
proc_parse.h eventpoll: parse_fdinfo_pid_s() returns allocated object for eventpol tfd 2014-09-02 16:08:17 +04:00
protobuf-desc.h timerfd: Add protobuf entries into the image 2014-08-06 19:18:34 +04:00
protobuf.h img: Add ability to check whether optional image collection happened 2014-08-12 14:38:22 +04:00
pstree.h dump: clean up shared_fdtable 2014-09-02 16:10:14 +04:00
ptrace.h ptrace: include config.h in ptrace.h 2014-02-07 15:32:17 +04:00
rbtree.h x86: moved x86-specific files into the directory arch/x86. 2013-01-09 17:02:47 +04:00
restorer.h rst: Rework task_entries to use rst_mem engine 2014-08-19 13:00:10 +04:00
rst-malloc.h whitespace-at-eol cleanup 2013-12-12 10:00:45 +04:00
rst_info.h files: Fix restoration of ghost cwd (and root) 2014-07-04 15:09:06 +04:00
servicefd.h cg: Restore tasks into proper cgroups 2014-05-27 23:48:06 +04:00
setproctitle.h crtools: check for setproctitle_init 2014-09-02 16:14:39 +04:00
shmem.h shmem: Explicitly initialize rst_shmems 2014-08-19 13:00:07 +04:00
sigframe.h parasite: don't include restorer.h in parasite-syscall.c 2013-11-06 12:39:36 +04:00
signalfd.h anon-inode: Don't readlink fd/fd multiple times 2014-02-02 22:14:29 +04:00
sk-inet.h headers: Add extern specificator to functions 2013-11-15 17:00:58 +04:00
sk-packet.h Make tpacket_req3 definition conditional 2014-02-10 14:31:02 +04:00
sk-queue.h crtools: move all stuff about vma together 2013-11-06 12:43:49 +04:00
sockets.h space-before-tab whitespace cleanup 2013-12-12 10:00:53 +04:00
stats.h stats: Fix restore pages stats 2014-02-04 14:03:10 +04:00
string.h make: config -- Add testing if we have libbsd installed 2014-03-26 01:44:23 +04:00
syscall-types.h mount: allow to dump and restore nested mount namespaces (v3) 2014-04-21 22:38:23 +04:00
sysctl.h headers: Unify include guards (in comments) and a few fixes 2012-12-25 22:40:24 +04:00
sysfs_parse.h Added AUFS support. 2014-08-21 18:35:22 +04:00
timerfd.h timerfd: Implement check routine 2014-08-07 10:18:09 +04:00
tty.h crtools: don't include crtools.h in other headers 2013-11-06 18:17:38 +04:00
tun.h headers: Add extern specificator to functions 2013-11-15 17:00:58 +04:00
unix_diag.h x86: moved x86-specific files into the directory arch/x86. 2013-01-09 17:02:47 +04:00
util-pie.h headers: Drop uintX_t usage 2013-12-12 10:03:07 +04:00
util.h util: add a function to check output data in a file descriptor 2014-09-02 16:25:50 +04:00
uts_ns.h headers: Add extern specificator to functions 2013-11-15 17:00:58 +04:00
vdso.h vdso: Implement vDSO proxification of any vvar/vdso order 2014-08-04 15:35:03 +04:00
vma.h Added AUFS support. 2014-08-21 18:35:22 +04:00
xmalloc.h core: Allocate CoreEntry (except arch) with single xmalloc 2014-03-14 13:39:28 +04:00