projects / lttng-modules.git / blame
| Commit | Line | Data |
|---|---|---|
| b7cdc182 | 1 | /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only) |
| 9f36eaed | 2 | * |
| 83f9bb7f MD |
3 | * wrapper/fdtable.h |
| 4 | * | |
| 5 | * Copyright (C) 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
| 83f9bb7f MD |
6 | */ |
| 7 | ||
| 9f36eaed MJ |
8 | #ifndef _LTTNG_WRAPPER_FDTABLE_H |
| 9 | #define _LTTNG_WRAPPER_FDTABLE_H | |
| 10 | ||
| 5f4c791e | 11 | #include <lttng/kernel-version.h> |
| 83f9bb7f | 12 | #include <linux/fdtable.h> |
| cf41b81e | 13 | #include <linux/sched.h> |
| 83f9bb7f | 14 | |
| 9f945e81 | 15 | #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(6,7,0)) |
| 0aebcd68 | 16 | static inline |
| 9f945e81 | 17 | struct file *lttng_lookup_fdget_rcu(unsigned int fd) |
| 0aebcd68 | 18 | { |
| 9f945e81 KS |
19 | return lookup_fdget_rcu(fd); |
| 20 | } | |
| 21 | ||
| 22 | #elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,11,0)) | |
| 23 | static inline | |
| 24 | struct file *lttng_lookup_fdget_rcu(unsigned int fd) | |
| 25 | { | |
| 26 | struct file* file = lookup_fd_rcu(fd); | |
| 27 | ||
| 28 | if (unlikely(!file || !get_file_rcu(file))) | |
| 29 | return NULL; | |
| 30 | return file; | |
| 0aebcd68 | 31 | } |
| 451e0627 | 32 | #elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,1,0)) |
| 0aebcd68 | 33 | static inline |
| 9f945e81 | 34 | struct file *lttng_lookup_fdget_rcu(unsigned int fd) |
| 0aebcd68 | 35 | { |
| 9f945e81 KS |
36 | struct file* file = fcheck(fd); |
| 37 | ||
| 38 | if (unlikely(!file || !get_file_rcu(file))) | |
| 39 | return NULL; | |
| 40 | return file; | |
| 0aebcd68 | 41 | } |
| 451e0627 MD |
42 | #else |
| 43 | static inline | |
| 44 | struct file *lttng_lookup_fdget_rcu(unsigned int fd) | |
| 45 | { | |
| 46 | struct file* file = fcheck(fd); | |
| 47 | ||
| 48 | if (unlikely(!file || !atomic_long_inc_not_zero(&file->f_count))) | |
| 49 | return NULL; | |
| 50 | return file; | |
| 51 | } | |
| 0aebcd68 MJ |
52 | #endif |
| 53 | ||
| 5f4c791e | 54 | #if (LTTNG_LINUX_VERSION_CODE < LTTNG_KERNEL_VERSION(3,7,0)) |
| 83f9bb7f MD |
55 | |
| 56 | int lttng_iterate_fd(struct files_struct *files, | |
| 57 | unsigned int first, | |
| 58 | int (*cb)(const void *, struct file *, unsigned int), | |
| 59 | const void *ctx); | |
| 60 | ||
| 61 | #else | |
| 62 | ||
| 63 | /* | |
| 64 | * iterate_fd() appeared at commit | |
| 65 | * c3c073f808b22dfae15ef8412b6f7b998644139a in the Linux kernel (first | |
| 66 | * released kernel: v3.7). | |
| 67 | */ | |
| 68 | #define lttng_iterate_fd iterate_fd | |
| 69 | ||
| 70 | #endif | |
| c07dca48 | 71 | |
| 5f4c791e | 72 | #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,4,0)) |
| c07dca48 MJ |
73 | |
| 74 | static inline bool lttng_close_on_exec(int fd, const struct fdtable *fdt) | |
| 75 | { | |
| 76 | return close_on_exec(fd, fdt); | |
| 77 | } | |
| 78 | ||
| 79 | #else | |
| 80 | ||
| 81 | static inline bool lttng_close_on_exec(int fd, const struct fdtable *fdt) | |
| 82 | { | |
| 83 | return FD_ISSET(fd, fdt->close_on_exec); | |
| 84 | } | |
| 85 | ||
| 86 | #endif | |
| 87 | ||
| 83f9bb7f | 88 | #endif /* _LTTNG_WRAPPER_FDTABLE_H */ |