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 <lttng/kernel-version.h>
  12 #include <linux/fdtable.h>
  13 #include <linux/sched.h>
  14
  15 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(6,7,0))
  16 static inline
  17 struct file *lttng_lookup_fdget_rcu(unsigned int fd)
  18 {
  19         return lookup_fdget_rcu(fd);
  20 }
  21
  22 #elif ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,11,0)) || \
  23         LTTNG_KERNEL_RANGE(5,10,220, 5,11,0))
  24 static inline
  25 struct file *lttng_lookup_fdget_rcu(unsigned int fd)
  26 {
  27         struct file* file = lookup_fd_rcu(fd);
  28
  29         if (unlikely(!file || !get_file_rcu(file)))
  30                 return NULL;
  31         return file;
  32 }
  33 #else
  34 static inline
  35 struct file *lttng_lookup_fdget_rcu(unsigned int fd)
  36 {
  37         struct file* file = fcheck(fd);
  38
  39         if (unlikely(!file || !get_file_rcu(file)))
  40                 return NULL;
  41         return file;
  42 }
  43 #endif
  44
  45 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(6,10,0))
  46 static inline
  47 bool lttng_close_on_exec(unsigned int fd, const struct files_struct *files)
  48 {
  49         return close_on_exec(fd, files);
  50 }
  51 #else
  52 static inline
  53 bool lttng_close_on_exec(unsigned int fd, const struct files_struct *files)
  54 {
  55         return close_on_exec(fd, files_fdtable(files));
  56 }
  57 #endif
  58
  59 #endif /* _LTTNG_WRAPPER_FDTABLE_H */