Commit | Line | Data |
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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 */ |