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author | Al Viro <viro@zeniv.linux.org.uk> | 2012-08-16 01:56:12 +0200 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-09-27 03:08:54 +0200 |
commit | 7cf4dc3c8dbfdfde163d4636f621cf99a1f63bfb (patch) | |
tree | 66ae2653acb5c5325cc4fc921bba53b6e6760983 /kernel/exit.c | |
parent | new helper: __alloc_fd() (diff) | |
download | linux-7cf4dc3c8dbfdfde163d4636f621cf99a1f63bfb.tar.xz linux-7cf4dc3c8dbfdfde163d4636f621cf99a1f63bfb.zip |
move files_struct-related bits from kernel/exit.c to fs/file.c
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/exit.c')
-rw-r--r-- | kernel/exit.c | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/kernel/exit.c b/kernel/exit.c index f65345f9e5bb..20dfc7617c2e 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -466,99 +466,6 @@ void daemonize(const char *name, ...) EXPORT_SYMBOL(daemonize); -static void close_files(struct files_struct * files) -{ - int i, j; - struct fdtable *fdt; - - j = 0; - - /* - * It is safe to dereference the fd table without RCU or - * ->file_lock because this is the last reference to the - * files structure. But use RCU to shut RCU-lockdep up. - */ - rcu_read_lock(); - fdt = files_fdtable(files); - rcu_read_unlock(); - for (;;) { - unsigned long set; - i = j * BITS_PER_LONG; - if (i >= fdt->max_fds) - break; - set = fdt->open_fds[j++]; - while (set) { - if (set & 1) { - struct file * file = xchg(&fdt->fd[i], NULL); - if (file) { - filp_close(file, files); - cond_resched(); - } - } - i++; - set >>= 1; - } - } -} - -struct files_struct *get_files_struct(struct task_struct *task) -{ - struct files_struct *files; - - task_lock(task); - files = task->files; - if (files) - atomic_inc(&files->count); - task_unlock(task); - - return files; -} - -void put_files_struct(struct files_struct *files) -{ - struct fdtable *fdt; - - if (atomic_dec_and_test(&files->count)) { - close_files(files); - /* - * Free the fd and fdset arrays if we expanded them. - * If the fdtable was embedded, pass files for freeing - * at the end of the RCU grace period. Otherwise, - * you can free files immediately. - */ - rcu_read_lock(); - fdt = files_fdtable(files); - if (fdt != &files->fdtab) - kmem_cache_free(files_cachep, files); - free_fdtable(fdt); - rcu_read_unlock(); - } -} - -void reset_files_struct(struct files_struct *files) -{ - struct task_struct *tsk = current; - struct files_struct *old; - - old = tsk->files; - task_lock(tsk); - tsk->files = files; - task_unlock(tsk); - put_files_struct(old); -} - -void exit_files(struct task_struct *tsk) -{ - struct files_struct * files = tsk->files; - - if (files) { - task_lock(tsk); - tsk->files = NULL; - task_unlock(tsk); - put_files_struct(files); - } -} - #ifdef CONFIG_MM_OWNER /* * A task is exiting. If it owned this mm, find a new owner for the mm. |