Note: Silently drops MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED as it's
not currently detectable. This is still better than silently dropping
all membarrier() registrations.
Signed-off-by: Michał Mirosław <emmir@google.com>
Will use this for cross mount namespace bindmounts.
Note: don't need separate kdat for mount-v2, as MOVE_MOUNT_SET_GROUP
were added much later than open_tree and all related fixups.
Signed-off-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>
Mounts-v2 requires new kernel feature MOVE_MOUNT_SET_GROUP to be able to
restore propagation between mounts right.
Cherry-picked from Virtuozzo criu:
https://src.openvz.org/projects/OVZ/repos/criu/commits/7da7f9a17
Changes: define move_mount syscall, check mainstream kernel
MOVE_MOUNT_SET_GROUP feature, use our "linux/mount.h" to overcome
possible problems of non-existing header on older kernels.
v3: coverity CID 389201: check ret of umount2 and rmdir at cleanup stage
Signed-off-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>
pidfd_getfd syscall will be needed later to send pidfds between
pre-dump/dump iterations for pid reuse detection.
v2:
- check size written/read of val_a/val_b is correct
- return with error when val_a != val_b
Signed-off-by: Zeyad Yasser <zeyady98@gmail.com>
pidfd_open syscall will be needed later to send pidfds between
pre-dump/dump iterations for pid reuse detection.
v2:
- make kerndat_has_pidfd_open void since 0 is always returned
- fix missing tabs in syscall tables
Signed-off-by: Zeyad Yasser <zeyady98@gmail.com>
CRIU follows Linux kernel coding style. This patch updates the
architecture-specific code for MIPS to use tab indentation,
add whitespace between closing parenthesis and open bracket,
and changes the mode of source files from 755 to 644.
Signed-off-by: Radostin Stoyanov <rstoyanov@fedoraproject.org>
Previously, __export_parasite_cmd was located in parasite-head.S, and
__export_parasite_args located exactly at the end of the parasite blob.
This is not ideal for various reasons:
1) These two variables work together. It would be preferrable to have
them in the same location
2) This prevent us from allocating another section betweeen the parasite
blob and the args area. We'll need this to allocate a GOT table
This commit changes the allocation of these symbols from assembly/linker
script to a C file.
Moreover, the assembly entry points that invoke parasite_service()
prepares arguments with hand crafted assembly. This is unecessary.
This commit rewrite this logic with regular C code.
Note: if it wasn't for the x86 compat mode, we could remove all
parasite-head.S files and directly jump to parasite_service() via
ptrace. An int3 architecture specific equivalent could be called at the
end of parasite_service() with an inline asm statement.
Signed-off-by: Nicolas Viennot <Nicolas.Viennot@twosigma.com>
