author: Linus Torvalds <torvalds@linux-foundation.org> 2020-01-29 19:38:34 -0800
committer: Linus Torvalds <torvalds@linux-foundation.org> 2020-01-29 19:38:34 -0800
commit: 83fa805bcbfc53ae82eedd65132794ae324798e5
parent: 896f8d23d0cb5889021d66eab6107e97109c5459
Commit Summary:
Diffstat:
1 file changed, 18 insertions, 2 deletions
diff --git a/fs/file.c b/fs/file.c
index fb7081bfac2b..a364e1a9b7e8 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -708,9 +708,9 @@ void do_close_on_exec(struct files_struct *files)
spin_unlock(&files->file_lock);
}
-static struct file *__fget(unsigned int fd, fmode_t mask, unsigned int refs)
+static struct file *__fget_files(struct files_struct *files, unsigned int fd,
+ fmode_t mask, unsigned int refs)
{
- struct files_struct *files = current->files;
struct file *file;
rcu_read_lock();
@@ -731,6 +731,12 @@ loop:
return file;
}
+static inline struct file *__fget(unsigned int fd, fmode_t mask,
+ unsigned int refs)
+{
+ return __fget_files(current->files, fd, mask, refs);
+}
+
struct file *fget_many(unsigned int fd, unsigned int refs)
{
return __fget(fd, FMODE_PATH, refs);
@@ -748,6 +754,18 @@ struct file *fget_raw(unsigned int fd)
}
EXPORT_SYMBOL(fget_raw);
+struct file *fget_task(struct task_struct *task, unsigned int fd)
+{
+ struct file *file = NULL;
+
+ task_lock(task);
+ if (task->files)
+ file = __fget_files(task->files, fd, 0, 1);
+ task_unlock(task);
+
+ return file;
+}
+
/*
* Lightweight file lookup - no refcnt increment if fd table isn't shared.
*