Revert "net: sockets: move poll implementation to zvfs"

This reverts commit 93973e2.

PR zephyrproject-rtos#73978 introduced a regression.
Unfortunately this PR cannot be reverted without reverting also
Let's revert both PRs to stabilize main again towards the 3.7 release.

For more details on the issue see
zephyrproject-rtos#75205

Signed-off-by: Alberto Escolar Piedras <[email protected]>

Author: aescolar

include/zephyr/net/socket.h

@@ -625,10 +625,7 @@ static inline int zsock_ioctl_wrapper(int sock, unsigned long request, ...)
  * it may conflict with generic POSIX ``poll()`` function).
  * @endrst
  */
-static inline int zsock_poll(struct zsock_pollfd *fds, int nfds, int timeout)
-{
-	return zvfs_poll(fds, nfds, timeout);
-}
+__syscall int zsock_poll(struct zsock_pollfd *fds, int nfds, int timeout);
 
 /**
  * @brief Get various socket options

include/zephyr/net/socket_poll.h

@@ -7,8 +7,6 @@
 #ifndef ZEPHYR_INCLUDE_NET_SOCKET_POLL_H_
 #define ZEPHYR_INCLUDE_NET_SOCKET_POLL_H_
 
-#include <zephyr/sys/fdtable.h>
-
 /* Setting for pollfd to avoid circular inclusion */
 
 /**
@@ -27,7 +25,11 @@ extern "C" {
  *
  * An array of these descriptors is passed as an argument to poll().
  */
-#define zsock_pollfd zvfs_pollfd
+struct zsock_pollfd {
+	int fd;        /**< Socket descriptor */
+	short events;  /**< Requested events */
+	short revents; /**< Returned events */
+};
 
 #ifdef __cplusplus
 }

include/zephyr/sys/fdtable.h

@@ -27,13 +27,6 @@
 #define ZVFS_MODE_IFLNK  0120000
 #define ZVFS_MODE_IFSOCK 0140000
 
-#define ZVFS_POLLIN   BIT(0)
-#define ZVFS_POLLPRI  BIT(1)
-#define ZVFS_POLLOUT  BIT(2)
-#define ZVFS_POLLERR  BIT(3)
-#define ZVFS_POLLHUP  BIT(4)
-#define ZVFS_POLLNVAL BIT(5)
-
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -199,17 +192,6 @@ static inline int zvfs_fdtable_call_ioctl(const struct fd_op_vtable *vtable, voi
 	return res;
 }
 
-struct zvfs_pollfd {
-	int fd;
-	short events;
-	short revents;
-};
-
-__syscall int zvfs_poll(struct zvfs_pollfd *fds, int nfds, int poll_timeout);
-
-struct zsock_fd_set {
-	uint32_t bitset[(CONFIG_ZVFS_OPEN_MAX + 31) / 32];
-};
 /**
  * Request codes for fd_op_vtable.ioctl().
  *

lib/os/CMakeLists.txt

@@ -12,9 +12,6 @@ zephyr_sources(
   )
 
 zephyr_sources_ifdef(CONFIG_FDTABLE fdtable.c)
-zephyr_syscall_header_ifdef(CONFIG_FDTABLE
-  ${ZEPHYR_BASE}/include/zephyr/sys/fdtable.h
-)
 
 zephyr_sources_ifdef(CONFIG_CBPRINTF_COMPLETE cbprintf_complete.c)
 zephyr_sources_ifdef(CONFIG_CBPRINTF_NANO cbprintf_nano.c)

lib/os/zvfs/CMakeLists.txt

@@ -2,4 +2,3 @@
 
 zephyr_library()
 zephyr_library_sources_ifdef(CONFIG_ZVFS_EVENTFD zvfs_eventfd.c)
-zephyr_library_sources_ifdef(CONFIG_ZVFS_POLL zvfs_poll.c)

lib/os/zvfs/Kconfig

@@ -16,7 +16,7 @@ if ZVFS
 
 config ZVFS_EVENTFD
 	bool "ZVFS event file descriptor support"
-	imply ZVFS_POLL
+	select POLL
 	help
 	  Enable support for ZVFS event file descriptors. An eventfd can
 	  be used as an event wait/notify mechanism together with POSIX calls
@@ -33,22 +33,4 @@ config ZVFS_EVENTFD_MAX
 
 endif # ZVFS_EVENTFD
 
-config ZVFS_POLL
-	bool "ZVFS poll"
-	select POLL
-	help
-	  Enable support for zvfs_poll().
-
-if ZVFS_POLL
-
-config ZVFS_POLL_MAX
-	int "Max number of supported zvfs_poll() entries"
-	default 6 if WIFI_NM_WPA_SUPPLICANT
-	default 4 if SHELL_BACKEND_TELNET
-	default 3
-	help
-	  Maximum number of entries supported for poll() call.
-
-endif # ZVFS_POLL
-
 endif # ZVFS

lib/os/zvfs/zvfs_poll.c

@@ -6,10 +6,9 @@ menu "POSIX device I/O"
 
 config POSIX_DEVICE_IO
 	bool "POSIX device I/O [EXPERIMENTAL]"
+	select FDTABLE
 	select EXPERIMENTAL
 	select REQUIRES_FULL_LIBC
-	select ZVFS
-	select ZVFS_POLL
 	help
 	  Select 'y' here and Zephyr will provide an implementation of the POSIX_DEVICE_IO Option
 	  Group such as FD_CLR(), FD_ISSET(), FD_SET(), FD_ZERO(), close(), fdopen(), fileno(), open(),

lib/posix/options/Kconfig.device_io

@@ -37,7 +37,8 @@ FUNC_ALIAS(open, _open, int);
 
 int poll(struct pollfd *fds, int nfds, int timeout)
 {
-	return zvfs_poll(fds, nfds, timeout);
+	/* TODO: create  zvfs_poll() and dispatch to subsystems based on file type */
+	return zsock_poll(fds, nfds, timeout);
 }
 
 ssize_t pread(int fd, void *buf, size_t count, off_t offset)

lib/posix/options/device_io.c

@@ -5,8 +5,7 @@
 
 menuconfig NET_SOCKETS
 	bool "BSD Sockets compatible API"
-	select ZVFS
-	select ZVFS_POLL
+	select FDTABLE
 	help
 	  Provide BSD Sockets like API on top of native Zephyr networking API.
 
@@ -48,7 +47,9 @@ config NET_SOCKETS_POSIX_NAMES
 
 config NET_SOCKETS_POLL_MAX
 	int "Max number of supported poll() entries"
-	default ZVFS_POLL_MAX
+	default 6 if WIFI_NM_WPA_SUPPLICANT
+	default 4 if SHELL_BACKEND_TELNET
+	default 3
 	help
 	  Maximum number of entries supported for poll() call.