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5b9707cb5c
fcntl(F_GETLK/F_SETLK/F_SETLKW) is handled by VFS and reaches file
systems as private FIOC_* ioctl commands. hostfs previously forwarded
those private ioctl command numbers to the host ioctl backend, which is
not the POSIX file-locking interface and cannot be interpreted by the
host OS.
Keep hostfs on the generic host_ioctl() path and define the FIOC_* lock
command values in the hostfs host ABI. The POSIX sim backend recognizes
those commands in host_ioctl() and translates struct flock fields to the
host ABI before calling host fcntl(). Other hostfs backends keep their
existing unsupported-host-ioctl behavior.
F_SETLKW is implemented in the POSIX sim backend by retrying
non-blocking host F_SETLK with a short sleep. This preserves the
blocking NuttX API without forwarding host F_SETLKW directly.
Testing:
- Host: Ubuntu 22.04 x86_64.
- Board/config: sim:nsh with CONFIG_FS_HOSTFS=y,
CONFIG_SIM_HOSTFS=y and CONFIG_EXAMPLES_SIM_POSIX=y.
- make -j16.
- Ran examples/sim_posix from nuttx-apps. The test mounted a long
/tmp hostfs path, opened a host-backed file, and verified
fcntl(F_SETLK), fcntl(F_GETLK), fcntl(F_SETLKW), and unlocking with
F_UNLCK. The app printed "sim_posix: hostfs locks ok" and
"sim_posix: PASS".
Assisted-by: Claude:Claude-Fable-5
Signed-off-by: Lingao Meng <menglingao@xiaomi.com>
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| .. | ||
| aio | ||
| binfs | ||
| cromfs | ||
| driver | ||
| event | ||
| fat | ||
| hostfs | ||
| inode | ||
| littlefs | ||
| mmap | ||
| mnemofs | ||
| mount | ||
| mqueue | ||
| nfs | ||
| nxffs | ||
| partition | ||
| procfs | ||
| romfs | ||
| rpmsgfs | ||
| semaphore | ||
| shm | ||
| smartfs | ||
| socket | ||
| spiffs | ||
| tmpfs | ||
| unionfs | ||
| userfs | ||
| v9fs | ||
| vfs | ||
| zipfs | ||
| CMakeLists.txt | ||
| fs_heap.c | ||
| fs_heap.h | ||
| fs_initialize.c | ||
| Kconfig | ||
| Makefile | ||