projects / lttng-modules.git / blame
| Commit | Line | Data |
|---|---|---|
| 83f9bb7f MD |
1 | /* |
| 2 | * wrapper/fdtable.c | |
| 3 | * | |
| 4 | * Copyright (C) 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
| 5 | * | |
| 6 | * This library is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU Lesser General Public | |
| 8 | * License as published by the Free Software Foundation; only | |
| 9 | * version 2.1 of the License. | |
| 10 | * | |
| 11 | * This library is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | * Lesser General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU Lesser General Public | |
| 17 | * License along with this library; if not, write to the Free Software | |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 19 | */ | |
| 20 | ||
| 21 | #include <linux/version.h> | |
| 22 | #include <linux/spinlock.h> | |
| 5a2f5e92 | 23 | #include <wrapper/fdtable.h> |
| 83f9bb7f MD |
24 | |
| 25 | #if (LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0)) | |
| 26 | ||
| 27 | /* | |
| 28 | * Reimplementation of iterate_fd() for kernels between 2.6.32 and 3.6 | |
| 29 | * (inclusive). | |
| 30 | */ | |
| 31 | int lttng_iterate_fd(struct files_struct *files, | |
| 32 | unsigned int first, | |
| 33 | int (*cb)(const void *, struct file *, unsigned int), | |
| 34 | const void *ctx) | |
| 35 | { | |
| 36 | struct fdtable *fdt; | |
| 37 | struct file *filp; | |
| 38 | unsigned int i; | |
| 39 | int res = 0; | |
| 40 | ||
| 41 | if (!files) | |
| 42 | return 0; | |
| 43 | spin_lock(&files->file_lock); | |
| 44 | fdt = files_fdtable(files); | |
| 45 | for (i = 0; i < fdt->max_fds; i++) { | |
| 46 | filp = fcheck_files(files, i); | |
| 47 | if (!filp) | |
| 48 | continue; | |
| 49 | res = cb(ctx, filp, i); | |
| 50 | if (res) | |
| 51 | break; | |
| 52 | } | |
| 53 | spin_unlock(&files->file_lock); | |
| 54 | return res; | |
| 55 | } | |
| 56 | ||
| 57 | #endif |