mirror of
https://github.com/kdave/btrfs-progs
synced 2024-12-18 12:25:12 +00:00
95d3f20b51
This commit introduces a new kind of back reference for btrfs metadata. Once a filesystem has been mounted with this commit, IT WILL NO LONGER BE MOUNTABLE BY OLDER KERNELS. The new back ref provides information about pointer's key, level and in which tree the pointer lives. This information allow us to find the pointer by searching the tree. The shortcoming of the new back ref is that it only works for pointers in tree blocks referenced by their owner trees. This is mostly a problem for snapshots, where resolving one of these fuzzy back references would be O(number_of_snapshots) and quite slow. The solution used here is to use the fuzzy back references in the common case where a given tree block is only referenced by one root, and use the full back references when multiple roots have a reference
87 lines
2.3 KiB
Makefile
87 lines
2.3 KiB
Makefile
CC=gcc
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AM_CFLAGS = -Wall -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=2
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CFLAGS = -g -Werror -Os
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objects = ctree.o disk-io.o radix-tree.o extent-tree.o print-tree.o \
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root-tree.o dir-item.o file-item.o inode-item.o \
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inode-map.o crc32c.o rbtree.o extent-cache.o extent_io.o \
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volumes.o utils.o
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#
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CHECKFLAGS=-D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise \
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-Wuninitialized -Wshadow -Wundef
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DEPFLAGS = -Wp,-MMD,$(@D)/.$(@F).d,-MT,$@
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INSTALL= install
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prefix ?= /usr/local
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bindir = $(prefix)/bin
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LIBS=-luuid
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progs = btrfsctl mkfs.btrfs btrfs-debug-tree btrfs-show btrfs-vol btrfsck
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# make C=1 to enable sparse
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ifdef C
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check=sparse $(CHECKFLAGS)
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else
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check=ls
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endif
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.c.o:
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$(check) $<
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$(CC) $(DEPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c $<
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all: version $(progs) manpages
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version:
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bash version.sh
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btrfsctl: $(objects) btrfsctl.o
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gcc $(CFLAGS) -o btrfsctl btrfsctl.o $(objects) $(LDFLAGS) $(LIBS)
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btrfs-vol: $(objects) btrfs-vol.o
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gcc $(CFLAGS) -o btrfs-vol btrfs-vol.o $(objects) $(LDFLAGS) $(LIBS)
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btrfs-show: $(objects) btrfs-show.o
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gcc $(CFLAGS) -o btrfs-show btrfs-show.o $(objects) $(LDFLAGS) $(LIBS)
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btrfsck: $(objects) btrfsck.o
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gcc $(CFLAGS) -o btrfsck btrfsck.o $(objects) $(LDFLAGS) $(LIBS)
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mkfs.btrfs: $(objects) mkfs.o
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gcc $(CFLAGS) -o mkfs.btrfs $(objects) mkfs.o $(LDFLAGS) $(LIBS)
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btrfs-debug-tree: $(objects) debug-tree.o
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gcc $(CFLAGS) -o btrfs-debug-tree $(objects) debug-tree.o $(LDFLAGS) $(LIBS)
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btrfstune: $(objects) btrfstune.o
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gcc $(CFLAGS) -o btrfstune $(objects) btrfstune.o $(LDFLAGS) $(LIBS)
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btrfs-image: $(objects) btrfs-image.o
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gcc $(CFLAGS) -o btrfs-image $(objects) btrfs-image.o -lpthread -lz $(LDFLAGS) $(LIBS)
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dir-test: $(objects) dir-test.o
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gcc $(CFLAGS) -o dir-test $(objects) dir-test.o $(LDFLAGS) $(LIBS)
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quick-test: $(objects) quick-test.o
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gcc $(CFLAGS) -o quick-test $(objects) quick-test.o $(LDFLAGS) $(LIBS)
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convert: $(objects) convert.o
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gcc $(CFLAGS) -o btrfs-convert $(objects) convert.o -lext2fs $(LDFLAGS) $(LIBS)
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manpages:
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cd man; make
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install-man:
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cd man; make install
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clean :
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rm -f $(progs) cscope.out *.o .*.d btrfs-convert
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cd man; make clean
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install: $(progs) install-man
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$(INSTALL) -m755 -d $(DESTDIR)$(bindir)
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$(INSTALL) $(progs) $(DESTDIR)$(bindir)
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if [ -e btrfs-convert ]; then $(INSTALL) btrfs-convert $(DESTDIR)$(bindir); fi
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-include .*.d
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