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2021-03-11fusefs: Implement default_permissions and allow_other mount options.Rahat Mahmood
By default, fusefs defers node permission checks to the server. The default_permissions mount option enables the usual unix permission checks based on the node owner and mode bits. Previously fusefs was incorrectly checking permissions unconditionally. Additionally, fusefs should restrict filesystem access to processes started by the mount owner to prevent the fuse daemon from gaining priviledge over other processes. The allow_other mount option overrides this behaviour. Previously fusefs was incorrectly skipping this check. Updates #3229 PiperOrigin-RevId: 362419092
2021-01-05fs/fuse: check that a task has a specified file descriptorAndrei Vagin
Reported-by: syzbot+814105309d2ae8651084@syzkaller.appspotmail.com PiperOrigin-RevId: 350159452
2020-12-07Fix error handling on fusefs mount.Rahat Mahmood
Don't propagate arbitrary golang errors up from fusefs because errors that don't map to an errno result in a sentry panic. Reported-by: syzbot+697cb635346e456fddfc@syzkaller.appspotmail.com PiperOrigin-RevId: 346220306
2020-11-03ARM64:fuse:alian stat struct order on multiarchHoward Zhang
fields order in stat struct is different from x86 to arm64. Please refer to x86_64-linux-gnu/bits/stat.h aarch64-linux-gnu/bits/stat.h Signed-off-by: Howard Zhang <howard.zhang@arm.com>
2020-09-17Fix kernfs unlinkat and rmdirat incorrect resolved path nameJinmou Li
2020-09-16Merge pull request #3934 from avagin:feature/fusegVisor bot
PiperOrigin-RevId: 332122081
2020-09-16FUSE readdir test fix ino initializationJinmou Li
2020-09-16test/fuse: use the getdents syscall instead of opendir/readdirAndrei Vagin
opendir() is a libc wrapper. Different libc-s can implement it differently.
2020-09-16test/fuse: clean upAndrei Vagin
2020-09-16fuse: fix a compile time errorAndrei Vagin
readdir_test.cc:134:24: error: variable length arrays are a C99 feature [-Werror,-Wvla-extension] char readdir_payload[readdir_payload_size];
2020-09-16Implement FUSE_UNLINKBoyuan He
Fixes #3696
2020-09-16Implement FUSE_SETATTRCraig Chi
This commit implements FUSE_SETATTR command. When a system call modifies the metadata of a regular file or a folder by chown(2), chmod(2), truncate(2), utime(2), or utimes(2), they should be translated to corresponding FUSE_SETATTR command and sent to the FUSE server. Fixes #3332
2020-09-16Add fh support for revise attr and fstat(2) testCraig Chi
According to Linux 4.4's FUSE behavior, the flags and fh attributes in FUSE_GETATTR are only used in read, write, and lseek. fstat(2) doesn't use them either. Add tests to ensure the requests sent from FUSE module are consistent with Linux's. Updates #3655
2020-09-16Add fuse_fd_util library to include common fuse fd test functionsCraig Chi
2020-09-16Add default attr in fuse_utilCraig Chi
fuse_util provides utilities for fuse testing. Add a function to return a stub fuse_attr struct with specified mode and nodeid.
2020-09-16Implement FUSE_WRITEJinmou Li
This commit adds basic write(2) support for FUSE.
2020-09-16Implement FUSE_CREATECraig Chi
FUSE_CREATE is called when issuing creat(2) or open(2) with O_CREAT. It creates a new file on the FUSE filesystem. Fixes #3825
2020-09-16fuse: Implement IterDirents for directory file descriptionRidwan Sharif
Fixes #3255. This change adds support for IterDirents. You can now use `ls` in the FUSE sandbox. Co-authored-by: Craig Chi <craigchi@google.com>
2020-09-16Implement FUSE_RMDIRRidwan Sharif
Fixes #3587 Co-authored-by: Craig Chi <craigchi@google.com>
2020-09-16Implement FUSE_READJinmou Li
Fixes #3206
2020-09-16Implement FUSE_MKDIRBoyuan He
Fixes #3392
2020-09-16Implement FUSE_READLINKBoyuan He
Fixes #3316
2020-09-16Implement FUSE_SYMLINKBoyuan He
Fixes #3452
2020-09-16Implement FUSE_MKNODBoyuan He
Fixes #3492
2020-09-16Implement FUSE_RELEASE/RELEASEDIRBoyuan He
Fixes #3314
2020-09-16Implement FUSE_OPEN/OPENDIRBoyuan He
Fixes #3174
2020-09-16Add function to create a fake inode in FUSE integration testCraig Chi
Adds a function for the testing thread to set up a fake inode with a specific path under mount point. After this function is called, each subsequent FUSE_LOOKUP request with the same path will be served with the fixed stub response. Fixes #3539
2020-09-16Add function generating array of iovec with different FUSE structsCraig Chi
This commit adds a function in the newly created fuse_util library, which accepts a variable number of arguments and data structures. Fixes #3609
2020-09-16Add functions in FUSE integration test to get metrics from FUSE serverCraig Chi
This commit adds 3 utility functions to ensure all received requests and preset responses are consumed. 1. Get number of unconsumed requests (received by the FUSE server but not consumed by the testing thread). 2. Get number of unsent responses (set by the testing thread but not processed by the FUSE server). 3. Get total bytes of the received requests (to ensure some operations don't trigger FUSE requests). Fixes #3607
2020-09-16Extend integration test to test sequence of FUSE operationCraig Chi
Original FUSE integration test has limited capabilities. To test more situations, the new integration test framework introduces a protocol to communicate between testing thread and the FUSE server. In summary, this change includes: 1. Remove CompareResult() and break SetExpected() into SetServerResponse() and GetServerActualRequest(). We no longer set up an expected request because we want to retrieve the actual FUSE request made to the FUSE server and check in the testing thread. 2. Declare a serial buffer data structure to save the received requests and expected responses sequentially. The data structure contains a cursor to indicate the progress of accessing. This change makes sequential SetServerResponse() and GetServerActualRequest() possible. 3. Replace 2 single directional pipes with 1 bi-directional socketpair. A protocol which starts with FuseTestCmd is used between the testing thread and the FUSE server to provide various functionality. Fixes #3405
2020-08-12Merge pull request #3250 from craig08:fuse-getattrgVisor bot
PiperOrigin-RevId: 326313858
2020-08-10Implement FUSE_GETATTRCraig Chi
FUSE_GETATTR is called when a stat(2), fstat(2), or lstat(2) is issued from VFS2 layer to a FUSE filesystem. Fixes #3175
2020-08-05Merge pull request #3502 from ↵gVisor bot
craig08:fuse-integration-test-fix-connection-refused PiperOrigin-RevId: 325080329
2020-08-04Fix FUSE integration test failed with ECONNREFUSEDCraig Chi
The newer version of FUSE_INIT checks the response from the FUSE server if its major number is equal to 7. If it's not, then FUSE_INIT fails and further filesystem operations will get ECONNREFUSED. To mitigate this issue, we can send back a response with major version equals to 7 when consuming the first FUSE_INIT request. Fixes #3500
2020-08-04Merge pull request #3320 from craig08:fuse-integration-testgVisor bot
PiperOrigin-RevId: 324877577
2020-08-04Add FUSE integration testCraig Chi
This commit adds an integration test framework for FUSE support. Please refer to the test example and test/fuse/README.md for further details. Fixes #3098