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79 lines
2.2 KiB
79 lines
2.2 KiB
#!/usr/bin/env python3
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import os
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import sys
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import tempfile
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from posix_parity import fail
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from posix_parity import join
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from posix_parity import touch
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def main():
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if len(sys.argv) != 2:
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print("usage: TEST_posix_release <mountpoint>", file=sys.stderr)
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return 1
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mount = sys.argv[1]
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with tempfile.TemporaryDirectory() as native:
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merge_file = join(mount, "posix-release/file")
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native_file = join(native, "posix-release/file")
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touch(merge_file, b"abc")
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touch(native_file, b"abc")
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# Open + dup so one close does not release the underlying open-file state.
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mfd1 = os.open(merge_file, os.O_RDWR)
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nfd1 = os.open(native_file, os.O_RDWR)
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mfd2 = os.dup(mfd1)
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nfd2 = os.dup(nfd1)
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try:
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os.close(mfd1)
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os.close(nfd1)
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mw = os.write(mfd2, b"X")
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nw = os.write(nfd2, b"X")
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if mw != nw:
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return fail(f"release dup write mismatch mergerfs={mw} native={nw}")
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os.lseek(mfd2, 0, os.SEEK_SET)
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os.lseek(nfd2, 0, os.SEEK_SET)
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mr = os.read(mfd2, 4)
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nr = os.read(nfd2, 4)
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if mr != nr:
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return fail(f"release dup read mismatch mergerfs={mr!r} native={nr!r}")
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finally:
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os.close(mfd2)
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os.close(nfd2)
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with open(merge_file, "rb") as mf, open(native_file, "rb") as nf:
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md = mf.read()
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nd = nf.read()
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if md != nd:
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return fail(f"release final data mismatch mergerfs={md!r} native={nd!r}")
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# Closing same fd twice should map to EBADF on both.
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mfd = os.open(merge_file, os.O_RDONLY)
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nfd = os.open(native_file, os.O_RDONLY)
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os.close(mfd)
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os.close(nfd)
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try:
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os.close(mfd)
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m_err = 0
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except OSError as exc:
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m_err = exc.errno
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try:
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os.close(nfd)
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n_err = 0
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except OSError as exc:
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n_err = exc.errno
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if m_err != n_err:
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return fail(f"release EBADF mismatch mergerfs_errno={m_err} native_errno={n_err}")
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return 0
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if __name__ == "__main__":
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raise SystemExit(main())
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