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Pavel Emelyanov 8ce37e676a img: Don't create empty images 
Currently on dump we generate too many image files, effectively
all the stuff from the GLOB set is created. The thing is that
sometimes some of created images can be empty (just contain the
magic number at the head). Thos images are useless and just
waste the space.

When applied after the "empty images" set, this introduces the
lazy images -- when we call open_image() the actual file is
only created (and the magic number is written into it) when the
very first object goes into it.

For example for the simplest test we have, then static/env00
one, the created image files are

   core-7290.img
   creds-7290.img
   fdinfo-2.img
   fs-7290.img
   ids-7290.img
   inventory.img
   mm-7290.img
   pagemap-7290.img
   pages-1.img
   pstree.img
   reg-files.img
   sigacts-7290.img

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
2015-03-16 15:58:32 +03:00
..
asm-generic cr: collect short integer aliases in the single place 2014-04-08 15:35:46 +04:00
action-scripts.h scripts: Add ACT_MAX limit and make @action_names being const 2014-10-27 21:30:37 +04:00
aio.h aio: Restore AIO contexts 2014-12-26 18:13:40 +03:00
bfd.h bfd: Don't leak image-open flags into bfdopen 2015-03-16 15:58:14 +03:00
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 cpuinfo: Add "cpuinfo [dump|check]" commands, v2 2014-10-03 13:26:58 +04:00
cr-errno.h cr_errno: move cr_err helpers into cr_errno.h 2014-12-22 13:50:45 +03:00
cr-service-const.h service: move constants to cr-service-const.h 2013-12-18 14:26:10 +04:00
cr-service.h scripts: Use numeric action val in RPC notifications 2014-09-05 13:48:27 +04:00
cr-show.h img: Introduce the struct cr_img 2014-09-30 21:48:13 +04:00
cr_options.h cpu: Add 'ins' mode to --cpu-cap option 2014-12-26 18:15:46 +03:00
criu-log.h criu: print correct errno messages from pr_perror() 2015-02-13 15:14:44 +03:00
criu-plugin.h plugin: Explicit assign plugin hooks 2014-09-19 17:39:06 +04:00
crtools.h security: create separate security.h header 2015-02-10 16:53:54 +03:00
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
fifo.h img: Rename fdset -> imgset 2014-09-30 21:48:10 +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 reg-files: Do not try to linkat with wrong user 2015-02-13 16:11:38 +04:00
files.h fd: Factor out inheriting FDs code 2015-01-12 14:46:51 +03:00
fs-magic.h remap: add a dead pid /proc remap 2014-09-19 17:42:48 +04:00
fsnotify.h fsnotify: merge fanotify mark image into fanotify image (v3) 2014-09-03 20:51:39 +04:00
image-desc.h criu: add constants about user namespaces 2014-11-07 17:00:32 +04:00
image.h img: Don't create empty images 2015-03-16 15:58:32 +03:00
imgset.h img: Introduce the struct cr_img 2014-09-30 21:48:13 +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 ns: Factor out namespace switching call 2014-09-30 21:54:11 +04:00
irmap.h irmap: Get root mntfd before releasing tasks on predump 2014-10-01 09:37:04 +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 tcp: don't split packets for restoring a send queue 2014-12-08 15:46:44 +03:00
libnetlink.h nlk: Add error callback to do_rtnl_req 2015-01-22 18:54:37 +03:00
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 img: Introduce the struct cr_img 2014-09-30 21:48:13 +04:00
magic.h criu: add constants about user namespaces 2014-11-07 17:00:32 +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 img: Rename fdset -> imgset 2014-09-30 21:48:10 +04:00
namespaces.h usernsd: The way to restore priviledged stuff in userns 2015-02-13 16:11:38 +04:00
net.h Allow the veth-pair option to specify a bridge 2015-01-12 14:54:18 +03:00
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 page-read: Explicitly mark ENOENT with return code 2015-03-13 14:42:11 +03:00
page-xfer.h mem: check existence of parent images before dumping pages (v2) 2014-11-29 19:32:40 +03:00
pagemap-cache.h pagemap-cache: Use page.h helpers 2014-02-21 16:29:41 +04:00
parasite-syscall.h parasite: Cleanup args size fetching 2014-11-11 20:11:34 +04:00
parasite.h aio: Dump AIO rings 2014-12-26 18:13:36 +03:00
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 prctl: Add new interface constants 2014-10-27 21:25:25 +04:00
proc_parse.h proc: Drop always true last argument of parse_smaps() 2014-12-22 13:52:03 +03:00
protobuf-desc.h criu: add constants about user namespaces 2014-11-07 17:00:32 +04:00
protobuf.h img: Remove O_OPT and COLLECT_OPTIONAL 2015-03-13 14:42:01 +03:00
pstree.h pstree: Add helper for adding helpers to pstree 2014-10-14 18:02:36 +04:00
ptrace.h dump: remove useless arguments from seize_task() 2014-11-07 17:14:54 +04:00
rbtree.h x86: moved x86-specific files into the directory arch/x86. 2013-01-09 17:02:47 +04:00
restorer.h shmem: Turn shmem-info into shared objects from shremap ones 2015-01-12 14:47:24 +03:00
rst-malloc.h whitespace-at-eol cleanup 2013-12-12 10:00:45 +04:00
rst_info.h usernsd: The way to restore priviledged stuff in userns 2015-02-13 16:11:38 +04:00
security.h security: add cr_fchown 2015-02-10 16:54:31 +03:00
servicefd.h usernsd: The way to restore priviledged stuff in userns 2015-02-13 16:11:38 +04:00
setproctitle.h crtools: check for setproctitle_init 2014-09-02 16:14:39 +04:00
shmem.h shmem: Turn shmem-info into shared objects from shremap ones 2015-01-12 14:47:24 +03:00
sigframe.h parasite: don't include restorer.h in parasite-syscall.c 2013-11-06 12:39:36 +04:00
signalfd.h img: Rename fdset -> imgset 2014-09-30 21:48:10 +04:00
sk-inet.h Do not call listen() when SO_REUSEADDR is off 2015-02-16 13:18:32 +03:00
sk-packet.h img: Rename fdset -> imgset 2014-09-30 21:48:10 +04:00
sk-queue.h crtools: move all stuff about vma together 2013-11-06 12:43:49 +04:00
sockets.h sockets: define NETLINK_SOCK_DIAG in sockets.h 2015-01-23 15:40:02 +03:00
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 x86: Add io syscalls 2014-12-26 18:13:33 +03:00
sysctl.h sysctl: Remove dead CTL_PRINT|_SHOW code 2015-01-27 16:18:27 +03:00
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 tty: Rename tty_type to tty_driver 2015-03-10 21:16:22 +03:00
tun.h check/zdtm: Introduce fine-grained feature testing 2015-01-22 18:55:34 +03:00
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: Fix the ispathsub corner case 2014-11-09 23:26:56 +04:00
uts_ns.h ns: Factor out namespace switching call 2014-09-30 21:54:11 +04:00
vdso.h vdso: Implement vDSO proxification of any vvar/vdso order 2014-08-04 15:35:03 +04:00
vma.h aio: Dump AIO rings 2014-12-26 18:13:36 +03:00
xmalloc.h core: Allocate CoreEntry (except arch) with single xmalloc 2014-03-14 13:39:28 +04:00