projects / lttng-modules.git / blame
| Commit | Line | Data |
|---|---|---|
| 62d0a59c MJ |
1 | /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only) |
| 2 | * | |
| 3 | * wrapper/fs.h | |
| 4 | * | |
| 5 | * Copyright (C) 2020 Michael Jeanson <mjeanson@efficios.com> | |
| 6 | */ | |
| 7 | ||
| 8 | #ifndef _LTTNG_WRAPPER_FS_H | |
| 9 | #define _LTTNG_WRAPPER_FS_H | |
| 10 | ||
| 11 | #include <linux/fs.h> | |
| 12 | #include <lttng/kernel-version.h> | |
| 13 | ||
| 14 | #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0)) | |
| 15 | ||
| 16 | static inline | |
| 17 | ssize_t lttng_kernel_read(struct file *file, void *buf, size_t count, loff_t *pos) | |
| 18 | { | |
| 19 | return kernel_read(file, buf, count, pos); | |
| 20 | } | |
| 21 | ||
| 22 | #else /* LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0) */ | |
| 23 | ||
| 24 | static inline | |
| 25 | ssize_t lttng_kernel_read(struct file *file, void *buf, size_t count, loff_t *pos) | |
| 26 | { | |
| 27 | ssize_t len; | |
| 28 | ||
| 29 | len = kernel_read(file, *pos, buf, count); | |
| 30 | ||
| 31 | /* | |
| 32 | * Move 'pos' forward since it's passed by value in this | |
| 33 | * implementation of 'kernel_read'. | |
| 34 | */ | |
| 35 | if (len > 0) | |
| 36 | (*pos) += len; | |
| 37 | ||
| 38 | return len; | |
| 39 | } | |
| 40 | ||
| 41 | #endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0) */ | |
| 42 | ||
| 43 | #endif /* _LTTNG_WRAPPER_FS_H */ |