f5f4199c10
These patches extend FUSE to be able to act as a stacked filesystem. This allows pure passthrough, where the fuse file system simply reflects the lower filesystem, and also allows optional pre and post filtering in BPF and/or the userspace daemon as needed. This can dramatically reduce or even eliminate transitions to and from userspace. See https://lwn.net/Articles/915717/ Note that this patch set has been extensively tested in common-android13-5.10 This is a squash of these changes cherry-picked from common-android13-5.10 ANDROID: fuse-bpf: Make compile and pass test ANDROID: fuse-bpf: set error_in to ENOENT in negative lookup ANDROID: fuse-bpf: Add ability to run ranges of tests to fuse_test ANDROID: fuse-bpf: Add test for lookup postfilter ANDROID: fuse-bpf: readddir postfilter fixes ANDROID: fix kernelci error in fs/fuse/dir.c ANDROID: fuse-bpf: Fix RCU/reference issue ANDROID: fuse-bpf: Always call revalidate for backing ANDROID: fuse-bpf: Adjust backing handle funcs ANDROID: fuse-bpf: Fix revalidate error path and backing handling ANDROID: fuse-bpf: Fix use of get_fuse_inode ANDROID: fuse: Don't use readdirplus w/ nodeid 0 ANDROID: fuse-bpf: Introduce readdirplus test case for fuse bpf ANDROID: fuse-bpf: Make sure force_again flag is false by default ANDROID: fuse-bpf: Make inodes with backing_fd reachable for regular FUSE fuse_iget Revert "ANDROID: fuse-bpf: use target instead of parent inode to execute backing revalidate" ANDROID: fuse-bpf: use target instead of parent inode to execute backing revalidate ANDROID: fuse-bpf: Fix misuse of args.out_args ANDROID: fuse-bpf: Fix non-fusebpf build ANDROID: fuse-bpf: Use fuse_bpf_args in uapi ANDROID: fuse-bpf: Fix read_iter ANDROID: fuse-bpf: Use cache and refcount ANDROID: fuse-bpf: Rename iocb_fuse to iocb_orig ANDROID: fuse-bpf: Fix fixattr in rename ANDROID: fuse-bpf: Fix readdir ANDROID: fuse-bpf: Fix lseek return value for offset 0 ANDROID: fuse-bpf: fix read_iter and write_iter ANDROID: fuse-bpf: fix special devices ANDROID: fuse-bpf: support FUSE_LSEEK ANDROID: fuse-bpf: Add support for FUSE_COPY_FILE_RANGE ANDROID: fuse-bpf: Report errors to finalize ANDROID: fuse-bpf: Avoid reusing uint64_t for file ANDROID: fuse-bpf: Fix CONFIG_FUSE_BPF typo in FUSE_FSYNCDIR ANDROID: fuse-bpf: Move fd operations to be synchronous ANDROID: fuse-bpf: Invalidate if lower is unhashed ANDROID: fuse-bpf: Move bpf earlier in fuse_permission ANDROID: fuse-bpf: Update attributes on file write ANDROID: fuse: allow mounting with no userspace daemon ANDROID: fuse-bpf: Support FUSE_STATFS ANDROID: fuse-bpf: Fix filldir ANDROID: fuse-bpf: fix fuse_create_open_finalize ANDROID: fuse: add bpf support for removexattr ANDROID: fuse-bpf: Fix truncate ANDROID: fuse-bpf: Support inotify ANDROID: fuse-bpf: Make compile with CONFIG_FUSE but no CONFIG_FUSE_BPF ANDROID: fuse-bpf: Fix perms on readdir ANDROID: fuse: Fix umasking in backing ANDROID: fs/fuse: Backing move returns EXDEV if TO not backed ANDROID: bpf-fuse: Fix Setattr ANDROID: fuse-bpf: Check if mkdir dentry setup ANDROID: fuse-bpf: Close backing fds in fuse_dentry_revalidate ANDROID: fuse-bpf: Close backing-fd on both paths ANDROID: fuse-bpf: Partial fix for mmap'd files ANDROID: fuse-bpf: Restore a missing const ANDROID: Add fuse-bpf self tests ANDROID: Add FUSE_BPF to gki_defconfig ANDROID: fuse-bpf v1 ANDROID: fuse: Move functions in preparation for fuse-bpf Bug: 202785178 Test: test_fuse passes on linux. On cuttlefish, atest android.scopedstorage.cts.host.ScopedStorageHostTest passes with fuse-bpf enabled and disabled Change-Id: Idb099c281f9b39ff2c46fa3ebc63e508758416ee Signed-off-by: Paul Lawrence <paullawrence@google.com> Signed-off-by: Daniel Rosenberg <drosen@google.com>
35 lines
945 B
Makefile
35 lines
945 B
Makefile
# SPDX-License-Identifier: GPL-2.0
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CFLAGS += -D_FILE_OFFSET_BITS=64 -Wall -Werror -I../.. -I../../../../.. -I../../../../include
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LDLIBS := -lpthread -lelf
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TEST_GEN_PROGS := fuse_test fuse_daemon
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TEST_GEN_FILES := \
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test_bpf.bpf \
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fd_bpf.bpf \
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fd.sh \
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EXTRA_CLEAN := *.bpf
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BPF_FLAGS = -Wall -Werror -O2 -g -emit-llvm \
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-I ../../../../../include \
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-idirafter /usr/lib/gcc/x86_64-linux-gnu/10/include \
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-idirafter /usr/local/include \
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-idirafter /usr/include/x86_64-linux-gnu \
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-idirafter /usr/include \
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include ../../lib.mk
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# Put after include ../../lib.mk since that changes $(TEST_GEN_PROGS)
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# Otherwise you get multiple targets, this becomes the default, and it's a mess
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EXTRA_SOURCES := bpf_loader.c
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$(TEST_GEN_PROGS) : $(EXTRA_SOURCES)
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$(OUTPUT)/%.ir: %.c
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clang $(BPF_FLAGS) -c $< -o $@
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$(OUTPUT)/%.bpf: $(OUTPUT)/%.ir
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llc -march=bpf -filetype=obj -o $@ $<
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$(OUTPUT)/fd.sh: fd.txt
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cp $< $@
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chmod 755 $@
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