wrapper/fdtable.h

   1 /* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
   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 <lttng-kernel-version.h>
  12 #include <linux/fdtable.h>
  13 #include <linux/sched.h>
  14
  15 #if ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,11,0)) || \
  16         LTTNG_KERNEL_RANGE(5,10,220, 5,11,0))
  17 static inline
  18 struct file *lttng_lookup_fd_rcu(unsigned int fd)
  19 {
  20         return lookup_fd_rcu(fd);
  21 }
  22 #else
  23 static inline
  24 struct file *lttng_lookup_fd_rcu(unsigned int fd)
  25 {
  26         return fcheck(fd);
  27 }
  28 #endif
  29
  30 #if (LTTNG_LINUX_VERSION_CODE < LTTNG_KERNEL_VERSION(3,7,0))
  31
  32 int lttng_iterate_fd(struct files_struct *files,
  33                 unsigned int first,
  34                 int (*cb)(const void *, struct file *, unsigned int),
  35                 const void *ctx);
  36
  37 #else
  38
  39 /*
  40  * iterate_fd() appeared at commit
  41  * c3c073f808b22dfae15ef8412b6f7b998644139a in the Linux kernel (first
  42  * released kernel: v3.7).
  43  */
  44 #define lttng_iterate_fd        iterate_fd
  45
  46 #endif
  47
  48 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,4,0))
  49
  50 static inline bool lttng_close_on_exec(int fd, const struct fdtable *fdt)
  51 {
  52         return close_on_exec(fd, fdt);
  53 }
  54
  55 #else
  56
  57 static inline bool lttng_close_on_exec(int fd, const struct fdtable *fdt)
  58 {
  59         return FD_ISSET(fd, fdt->close_on_exec);
  60 }
  61
  62 #endif
  63
  64 #endif /* _LTTNG_WRAPPER_FDTABLE_H */