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 #include <linux/sched.h>
  14
  15 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,11,0))
  16 static inline
  17 struct file *lttng_lookup_fd_rcu(unsigned int fd)
  18 {
  19         return lookup_fd_rcu(fd);
  20 }
  21 #else
  22 static inline
  23 struct file *lttng_lookup_fd_rcu(unsigned int fd)
  24 {
  25         return fcheck(fd);
  26 }
  27 #endif
  28
  29 #if (LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0))
  30
  31 int lttng_iterate_fd(struct files_struct *files,
  32                 unsigned int first,
  33                 int (*cb)(const void *, struct file *, unsigned int),
  34                 const void *ctx);
  35
  36 #else
  37
  38 /*
  39  * iterate_fd() appeared at commit
  40  * c3c073f808b22dfae15ef8412b6f7b998644139a in the Linux kernel (first
  41  * released kernel: v3.7).
  42  */
  43 #define lttng_iterate_fd        iterate_fd
  44
  45 #endif
  46
  47 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
  48
  49 static inline bool lttng_close_on_exec(int fd, const struct fdtable *fdt)
  50 {
  51         return close_on_exec(fd, fdt);
  52 }
  53
  54 #else
  55
  56 static inline bool lttng_close_on_exec(int fd, const struct fdtable *fdt)
  57 {
  58         return FD_ISSET(fd, fdt->close_on_exec);
  59 }
  60
  61 #endif
  62
  63 #endif /* _LTTNG_WRAPPER_FDTABLE_H */