qemu/migration
Li Zhijian 44bcfd45e9 migration/rdma: destination: create the return patch after the first accept
destination side:
$ build/qemu-system-x86_64 -enable-kvm -netdev tap,id=hn0,script=/etc/qemu-ifup,downscript=/etc/qemu-ifdown -device e1000,netdev=hn0,mac=50:52:54:00:11:22 -boot c -drive if=none,file=./Fedora-rdma-server-migration.qcow2,id=drive-virtio-disk0 -device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0 -m 2048 -smp 2 -device piix3-usb-uhci -device usb-tablet -monitor stdio -vga qxl -spice streaming-video=filter,port=5902,disable-ticketing -incoming rdma:192.168.1.10:8888
(qemu) migrate_set_capability postcopy-ram on
(qemu)
dest_init RDMA Device opened: kernel name rocep1s0f0 uverbs device name uverbs0, infiniband_verbs class device path /sys/class/infiniband_verbs/uverbs0, infiniband class device path /sys/class/infiniband/rocep1s0f0, transport: (2) Ethernet
Segmentation fault (core dumped)

 (gdb) bt
 #0  qemu_rdma_accept (rdma=0x0) at ../migration/rdma.c:3272
 #1  rdma_accept_incoming_migration (opaque=0x0) at     ../migration/rdma.c:3986
 #2  0x0000563c9e51f02a in aio_dispatch_handler
     (ctx=ctx@entry=0x563ca0606010, node=0x563ca12b2150) at ../util/aio-posix.c:329
 #3  0x0000563c9e51f752 in aio_dispatch_handlers (ctx=0x563ca0606010) at      ../util/aio-posix.c:372
 #4  aio_dispatch (ctx=0x563ca0606010) at ../util/aio-posix.c:382
 #5  0x0000563c9e4f4d9e in aio_ctx_dispatch (source=<optimized out>,      callback=<optimized out>, user_data=<optimized out>)    at ../util/async.c:306
 #6  0x00007fe96ef3fa9f in g_main_context_dispatch () at      /lib64/libglib-2.0.so.0
 #7  0x0000563c9e4ffeb8 in glib_pollfds_poll () at     ../util/main-loop.c:231
 #8  os_host_main_loop_wait (timeout=12188789) at     ../util/main-loop.c:254
 #9  main_loop_wait (nonblocking=nonblocking@entry=0) at     ../util/main-loop.c:530
 #10 0x0000563c9e3c7211 in qemu_main_loop () at     ../softmmu/runstate.c:725
 #11 0x0000563c9dfd46fe in main (argc=<optimized out>, argv=<optimized     out>, envp=<optimized out>) at ../softmmu/main.c:50

The rdma return path will not be created when qemu incoming is starting
since migrate_copy() is false at that moment, then a  NULL return path
rdma was referenced if the user enabled postcopy later.

Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Message-Id: <20210525080552.28259-3-lizhijian@cn.fujitsu.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2021-05-26 18:39:32 +01:00
..
block-dirty-bitmap.c migration/block-dirty-bitmap: make incoming disabled bitmaps busy 2021-03-24 13:41:19 +00:00
block.c migration: using trace_ to replace DPRINTF 2020-10-26 16:15:04 +00:00
block.h migration: disable auto-converge during bulk block migration 2017-09-27 11:27:14 +01:00
channel.c yank: Remove dependency on qiochannel 2021-04-01 15:27:44 +04:00
channel.h migration: Route errors down through migration_channel_connect 2018-02-06 10:55:12 +00:00
colo-failover.c qemu/atomic.h: rename atomic_ to qatomic_ 2020-09-23 16:07:44 +01:00
colo.c Remove superfluous timer_del() calls 2021-01-08 15:13:38 +00:00
dirtyrate.c migration/dirtyrate: simplify includes in dirtyrate.c 2020-11-12 15:52:14 +00:00
dirtyrate.h migration/dirtyrate: Implement set_sample_page_period() and is_sample_period_valid() 2020-09-25 12:45:58 +01:00
exec.c migration: unify incoming processing 2018-07-10 12:48:53 +01:00
exec.h migration: Export exec.c functions in its own file 2017-06-01 18:49:22 +02:00
fd.c monitor: Use getter/setter functions for cur_mon 2020-10-09 07:08:19 +02:00
fd.h migration: Fix fd protocol for incoming defer 2019-06-05 12:43:55 +02:00
global_state.c migration: Silence compiler warning in global_state_store_running() 2020-10-02 12:28:48 +01:00
meson.build migration: Move populate_vfio_info() into a separate file 2021-05-14 12:31:51 +02:00
migration.c * Replace YAML anchors by extends in the gitlab-CI yaml files 2021-05-14 19:33:23 +01:00
migration.h * Replace YAML anchors by extends in the gitlab-CI yaml files 2021-05-14 19:33:23 +01:00
multifd-zlib.c multifd: Add zlib compression multifd support 2020-02-28 09:24:43 +01:00
multifd-zstd.c multifd: Add zstd compression multifd support 2020-02-28 09:25:49 +01:00
multifd.c migration/multifd: Print used_length of memory block 2021-05-13 18:21:14 +01:00
multifd.h migration/tls: add tls_hostname into MultiFDSendParams 2020-09-25 12:45:58 +01:00
page_cache.c migration: Fix cache_init()'s "Failed to allocate" error messages 2021-02-08 11:19:51 +00:00
page_cache.h migration: Clean up signed vs. unsigned XBZRLE cache-size 2021-02-08 11:19:51 +00:00
postcopy-ram.c migration/ram: Handle RAM block resizes during postcopy 2021-05-13 18:21:14 +01:00
postcopy-ram.h migration/: fix some comment spelling errors 2020-09-17 20:36:32 +02:00
qemu-file-channel.c yank: Remove dependency on qiochannel 2021-04-01 15:27:44 +04:00
qemu-file-channel.h migration: Export qemu-file-channel.c functions in its own file 2017-05-18 19:20:50 +02:00
qemu-file.c migration/qemu-file: Fix maybe uninitialized on qemu_get_buffer_in_place() 2021-02-08 11:19:51 +00:00
qemu-file.h Header cleanup patches for 2019-08-13 2019-08-16 14:53:43 +01:00
ram.c migration/ram: Use offset_in_ramblock() in range checks 2021-05-13 18:21:14 +01:00
ram.h migration: Pre-fault memory before starting background snasphot 2021-04-07 18:37:28 +01:00
rdma.c migration/rdma: destination: create the return patch after the first accept 2021-05-26 18:39:32 +01:00
rdma.h migration: Export rdma.c functions in its own file 2017-06-01 18:49:23 +02:00
savevm.c migration: introduce snapshot-{save, load, delete} QMP commands 2021-02-08 11:19:52 +00:00
savevm.h migration: Add blocker information 2021-02-08 11:19:51 +00:00
socket.c migration: unify the framework of socket-type channel 2020-08-28 13:34:52 +01:00
socket.h migration: unify the framework of socket-type channel 2020-08-28 13:34:52 +01:00
target.c migration: Move populate_vfio_info() into a separate file 2021-05-14 12:31:51 +02:00
tls.c migration: Fix Lesser GPL version number 2020-11-15 16:43:28 +01:00
tls.h migration: Fix Lesser GPL version number 2020-11-15 16:43:28 +01:00
trace-events migration: support UFFD write fault processing in ram_save_iterate() 2021-02-08 11:19:51 +00:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
vmstate-types.c migration: Replace migration's JSON writer by the general one 2020-12-19 10:39:16 +01:00
vmstate.c migration: Replace migration's JSON writer by the general one 2020-12-19 10:39:16 +01:00
xbzrle.c migration: Create migration/xbzrle.h 2017-05-18 18:04:54 +02:00
xbzrle.h migration: Create migration/xbzrle.h 2017-05-18 18:04:54 +02:00
yank_functions.c yank: Remove dependency on qiochannel 2021-04-01 15:27:44 +04:00
yank_functions.h yank: Remove dependency on qiochannel 2021-04-01 15:27:44 +04:00