include/wrapper/fdtable.h

   1 /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
   2  *
   3  * wrapper/fdtable.h
   4  *
   5  * Copyright (C) 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   6  */
   7
   8 #ifndef _LTTNG_WRAPPER_FDTABLE_H
   9 #define _LTTNG_WRAPPER_FDTABLE_H
  10
  11 #include <linux/version.h>
  12 #include <linux/fdtable.h>
  13
  14 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,11,0))
  15 static inline
  16 struct file *lttng_lookup_fd_rcu(unsigned int fd)
  17 {
  18         return lookup_fd_rcu(fd);
  19 }
  20 #else
  21 static inline
  22 struct file *lttng_lookup_fd_rcu(unsigned int fd)
  23 {
  24         return fcheck(fd);
  25 }
  26 #endif
  27
  28 #if (LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0))
  29
  30 int lttng_iterate_fd(struct files_struct *files,
  31                 unsigned int first,
  32                 int (*cb)(const void *, struct file *, unsigned int),
  33                 const void *ctx);
  34
  35 #else
  36
  37 /*
  38  * iterate_fd() appeared at commit
  39  * c3c073f808b22dfae15ef8412b6f7b998644139a in the Linux kernel (first
  40  * released kernel: v3.7).
  41  */
  42 #define lttng_iterate_fd        iterate_fd
  43
  44 #endif
  45
  46 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
  47
  48 static inline bool lttng_close_on_exec(int fd, const struct fdtable *fdt)
  49 {
  50         return close_on_exec(fd, fdt);
  51 }
  52
  53 #else
  54
  55 static inline bool lttng_close_on_exec(int fd, const struct fdtable *fdt)
  56 {
  57         return FD_ISSET(fd, fdt->close_on_exec);
  58 }
  59
  60 #endif
  61
  62 #endif /* _LTTNG_WRAPPER_FDTABLE_H */