mirror of
https://github.com/checkpoint-restore/criu.git
synced 2026-07-22 17:49:13 +00:00
2acc741a3a
We switch generic-object-id concept with sys_kcmp approach, which implies changes of image format a bit (and since it's early time for project overall, we're allowed to). In short -- previously every file descriptor had an ID generated by a kernel and exported via procfs. If the appropriate file descriptors were the same objects in kernel memory -- the IDs did match up to bit. It allows us to figure out which files were actually the identical ones and should be restored in a special way. Once sys_kcmp system call was merged into the kernel, we've got a new opprotunity -- to use this syscall instead. The syscall basically compares kernel objects and returns ordered results suitable for objects sorting in a userspace. For us it means -- we treat every file descriptor as a combination of 'genid' and 'subid'. While 'genid' serves for fast comparison between fds, the 'subid' is kind of a second key, which guarantees uniqueness of genid+subid tuple over all file descritors found in a process (or group of processes). To be able to find and dump file descriptors in a single pass we collect every fd into a global rbtree, where (!) each node might become a root for a subtree as well. The main tree carries only non-equal genid. If we find genid which is already in tree, we need to make sure that it's either indeed a duplicate or not. For this we use sys_kcmp syscall and if we find that file descriptors are different -- we simply put new fd into a subtree. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Acked-by: Pavel Emelyanov <xemul@parallels.com>
213 lines
4.7 KiB
Makefile
213 lines
4.7 KiB
Makefile
-include Makefile.inc
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CFLAGS += -I./include
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CFLAGS += -O0 -ggdb3
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LIBS += -lrt -lpthread
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DEFINES += -D_FILE_OFFSET_BITS=64
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DEFINES += -D_GNU_SOURCE
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ifneq ($(WERROR),0)
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WARNINGS += -Werror
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endif
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ifeq ($(DEBUG),1)
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DEFINES += -DCR_DEBUG
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endif
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WARNINGS += -Wall -Wno-unused
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CFLAGS += $(WARNINGS) $(DEFINES)
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PROGRAM := crtools
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export CC ECHO MAKE CFLAGS LIBS ARCH DEFINES
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OBJS_GEN_DEP += parasite-syscall.o
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OBJS_GEN_DEP += cr-restore.o
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DEPS_GEN := $(patsubst %.o,%.d,$(OBJS_GEN_DEP))
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OBJS += $(OBJS_GEN_DEP)
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OBJS += crtools.o
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OBJS += proc_parse.o
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OBJS += cr-dump.o
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OBJS += cr-show.o
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OBJS += util.o
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OBJS += util-net.o
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OBJS += sysctl.o
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OBJS += ptrace.o
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OBJS += rbtree.o
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OBJS += log.o
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OBJS += libnetlink.o
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OBJS += sockets.o
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OBJS += files.o
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OBJS += file-ids.o
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OBJS += namespaces.o
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OBJS += uts_ns.o
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OBJS += ipc_ns.o
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OBJS-BLOB += parasite.o
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SRCS-BLOB += $(patsubst %.o,%.c,$(OBJS-BLOB))
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HEAD-BLOB-GEN := $(patsubst %.o,%-blob.h,$(OBJS-BLOB))
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HEAD-BIN := $(patsubst %.o,%.bin,$(OBJS-BLOB))
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HEAD-LDS := $(patsubst %.o,%.lds.S,$(OBJS-BLOB))
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ROBJS-BLOB := restorer.o
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#
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# Everything embedded into restorer as a separate
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# object file should go here.
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ROBJS := $(ROBJS-BLOB)
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ROBJS += restorer-log.o
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RDEPS-BLOB += $(patsubst %.o,%.d,$(ROBJS))
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RSRCS-BLOB += $(patsubst %.o,%.c,$(ROBJS))
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RSRCS-BLOB += $(patsubst %.o,%.c,$(ROBJS-BLOB))
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RHEAD-BLOB-GEN := $(patsubst %.o,%-blob.h,$(ROBJS-BLOB))
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RHEAD-BIN := $(patsubst %.o,%.bin,$(ROBJS-BLOB))
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RHEAD-LDS := $(patsubst %.o,%.lds.S,$(ROBJS-BLOB))
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DEPS := $(patsubst %.o,%.d,$(OBJS)) \
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$(patsubst %.o,%.d,$(OBJS-BLOB)) \
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$(patsubst %.o,%.d,$(ROBJS-BLOB))
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all: $(PROGRAM)
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$(OBJS-BLOB): $(SRCS-BLOB)
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$(E) " CC " $@
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$(Q) $(CC) -c $(CFLAGS) -fpic $< -o $@
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parasite-util-net.o: util-net.c
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$(E) " CC " $@
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$(Q) $(CC) -c $(CFLAGS) -fpic $< -o $@
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$(HEAD-BIN): $(HEAD-LDS) $(OBJS-BLOB) parasite-util-net.o
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$(E) " GEN " $@
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$(Q) $(LD) -T $^ -o $@
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$(HEAD-BLOB-GEN): $(HEAD-BIN)
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$(E) " GEN " $@
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$(Q) $(SH) gen-offsets.sh \
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parasite_h__ \
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parasite_blob_offset__ \
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parasite_blob \
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$(OBJS-BLOB) \
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$(HEAD-BIN) > parasite-blob.h
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$(Q) sync
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$(ROBJS): $(RSRCS-BLOB)
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$(E) " CC " $@
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$(Q) $(CC) -c $(CFLAGS) -fpic $(patsubst %.o,%.c,$@) -o $@
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$(RHEAD-BIN): $(ROBJS) $(RHEAD-LDS)
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$(E) " GEN " $@
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$(Q) $(LD) -T $(patsubst %.bin,%.lds.S,$@) -o $@ $(ROBJS)
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$(RHEAD-BLOB-GEN): $(RHEAD-BIN) $(RDEPS-BLOB)
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$(E) " GEN " $@
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$(Q) $(SH) gen-offsets.sh \
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restorer_h__ \
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restorer_blob_offset__ \
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restorer_blob \
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$(ROBJS-BLOB) \
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$(RHEAD-BIN) > restorer-blob.h
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$(Q) sync
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%.o: %.c
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$(E) " CC " $@
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$(Q) $(CC) -c $(CFLAGS) $< -o $@
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%.i: %.c
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$(E) " CC " $@
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$(Q) $(CC) -E $(CFLAGS) $< -o $@
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%.s: %.c
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$(E) " CC " $@
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$(Q) $(CC) -S $(CFLAGS) -fverbose-asm $< -o $@
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$(PROGRAM): $(OBJS)
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$(E) " LINK " $@
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$(Q) $(CC) $(CFLAGS) $(OBJS) $(LIBS) -o $@
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$(DEPS_GEN): $(HEAD-BLOB-GEN) $(RHEAD-BLOB-GEN)
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%.d: %.c
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$(Q) $(CC) -M -MT $(patsubst %.d,%.o,$@) $(CFLAGS) $< -o $@
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test-legacy: $(PROGRAM)
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$(Q) $(MAKE) -C test/legacy all
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.PHONY: test-legacy
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zdtm: $(PROGRAM)
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$(Q) $(MAKE) -C test/zdtm all
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.PHONY: zdtm
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test: zdtm
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$(Q) $(SH) test/zdtm.sh
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.PHONY: test
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rebuild:
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$(E) " FORCE-REBUILD"
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$(Q) $(RM) -f ./*.o
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$(Q) $(RM) -f ./*.d
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$(Q) $(MAKE)
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.PHONY: rebuild
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clean:
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$(E) " CLEAN"
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$(Q) $(RM) -f ./*.o
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$(Q) $(RM) -f ./*.d
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$(Q) $(RM) -f ./*.i
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$(Q) $(RM) -f ./*.img
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$(Q) $(RM) -f ./*.out
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$(Q) $(RM) -f ./*.bin
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$(Q) $(RM) -f ./$(PROGRAM)
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$(Q) $(RM) -f ./$(HEAD-BLOB-GEN)
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$(Q) $(RM) -f ./$(RHEAD-BLOB-GEN)
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$(Q) $(RM) -rf ./test/dump/
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$(Q) $(MAKE) -C test/legacy clean
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$(Q) $(MAKE) -C test/zdtm cleandep
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$(Q) $(MAKE) -C test/zdtm clean
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$(Q) $(MAKE) -C test/zdtm cleanout
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$(Q) $(MAKE) -C Documentation clean
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.PHONY: clean
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distclean: clean
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$(E) " DISTCLEAN"
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$(Q) $(RM) -f ./tags
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$(Q) $(RM) -f ./cscope*
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.PHONY: distclean
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tags:
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$(E) " GEN" $@
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$(Q) $(RM) -f tags
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$(Q) $(FIND) . -name '*.[hcS]' ! -path './.*' -print | xargs ctags -a
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.PHONY: tags
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cscope:
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$(E) " GEN" $@
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$(Q) $(FIND) . -name '*.[hcS]' ! -path './.*' -print > cscope.files
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$(Q) $(CSCOPE) -bkqu
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.PHONY: cscope
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docs:
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$(Q) $(MAKE) -s -C Documentation all
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.PHONY: docs
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help:
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$(E) ' Targets:'
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$(E) ' all - Build all [*] targets'
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$(E) ' * crtools - Build crtools'
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$(E) ' zdtm - Build zdtm test-suite'
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$(E) ' docs - Build documentation'
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$(E) ' clean - Clean everything'
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$(E) ' tags - Generate tags file (ctags)'
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$(E) ' cscope - Generate cscope database'
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$(E) ' rebuild - Force-rebuild of [*] targets'
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$(E) ' test - Run zdtm test-suite'
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.PHONY: help
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ifeq ($(filter-out no-deps-targets, $(MAKECMDGOALS)),)
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-include $(DEPS)
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endif
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