Previously we have CHECK in WriteInternal function to observe short
writing. However it turns out short write can happen according to the
bug report.
To prevent app from crashing due to CHECK failure, the CL removes the
CHECK and let WriteInternal return a failure value.
Bug: 37561460
Test: libappfuse_tests, manually re-wrote the return value of write()
and checked logcat.
Change-Id: I6a1e233c3ddb8eb68f59e7c606ad0459b5ca2c6e
When /proc/sys/net/core/wmem_max is smaller than kMaxMessageSize, we
need to override the limitation.
Bug: 37561460
Test: libappfuse_tests
Change-Id: Ibaac8db61290d661459fdc46f0ae8416f7db1d9e
Previously libappfuse set SO_SNDBUF to the maximum message size. However
it does not prevent ENOBUF and it made AppFusePerfTest#testReadWriteFile
flaky.
The CL let FuseBuffer retry write operation when getting ENOBUFS.
Bug: 34903085
Test: libappfuse
Change-Id: I1602474d852e1599f6e69103bcf6f18277a5644b
The funciton is going to be used to write FUSE header with external
body.
Bug: 35229514
Test: libappfuse_tests
Change-Id: I303022b555deca960b8e08f26140a5ef10133efe
These methods return kAgain if operation cannot be done without blocking
the current thread.
The CL also introduecs new helper function SetupMessageSockets so that
FuseMessages are always transfered via sockets that save message
boundaries.
Bug: 34903085
Test: libappfuse_test
Change-Id: I34544372cc1b0c7bc9622e581ae16c018a123fa9
Previously AppFuse use SOCK_SEQPACKET for sockets communicating system
and app. However SOCK_SEQPACKET requires the buffer of message size in
the kernel and sometimes failed to write with ENOBUF.
The CL updates libappfuse so that it can use SOCK_STREAM instead of
SOCK_SEQPACKET.
Bug: 33279206
Test: libappfuse_test
Change-Id: I622ada9ac1d71d0c57b6cfff0904c7829cea7995
Previously FuseMessage were checking result of read/write operation
after checking header.len value is valid. This was wrong because
header.len does not contain correct value when read function does not
read any bytes and returns zero.
Bug: 33278098
Test: libappfuse_test
Change-Id: Icf998ca6c3eeee20cbc4aa2f65195a87e59ffc27
We return the minor version number 15 to FUSE_INIT since we don't handle
BATCH_FORGET. Thus the kernel does not accept the latest size of
fuse_init_out. Instead we need to use FUSE_COMPAT_22_INIT_OUT_SIZE.
Bug: 32779923
Test: libappfuse_test
Change-Id: I5c979d0e45344ca8adfe3ad3f4a9561442abcb3a
The class is used at the app side (StorageManager) to parse FUSE
commands.
Bug: 32260320
Test: libappfuse_test
Change-Id: I1ae2904d3290a041f1efbf8fc10ba032eda5449c
The CL adds FuseBridgeLoop class to libappfuse, which is used in the
system service to proxy fuse commands to applications.
Bug: 29970149
Test: libappfuse_test
Change-Id: I0708f608b3868721ab16ba4028fd2c17a6735af7
