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authorAl Viro <viro@zeniv.linux.org.uk>2012-08-15 21:12:10 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2012-09-26 21:08:56 -0400
commit0ee8cdfe6af052deb56dccd54838a1eb32fb4ca2 (patch)
tree3671169a822f5ed43482ab4db68d518906385e3d /fs/file_table.c
parentf869e8a7f753e3fd43d6483e796774776f645edb (diff)
downloadop-kernel-dev-0ee8cdfe6af052deb56dccd54838a1eb32fb4ca2.zip
op-kernel-dev-0ee8cdfe6af052deb56dccd54838a1eb32fb4ca2.tar.gz
take fget() and friends to fs/file.c
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/file_table.c')
-rw-r--r--fs/file_table.c106
1 files changed, 0 insertions, 106 deletions
diff --git a/fs/file_table.c b/fs/file_table.c
index 701985e..c678016 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -339,112 +339,6 @@ void __fput_sync(struct file *file)
EXPORT_SYMBOL(fput);
-struct file *fget(unsigned int fd)
-{
- struct file *file;
- struct files_struct *files = current->files;
-
- rcu_read_lock();
- file = fcheck_files(files, fd);
- if (file) {
- /* File object ref couldn't be taken */
- if (file->f_mode & FMODE_PATH ||
- !atomic_long_inc_not_zero(&file->f_count))
- file = NULL;
- }
- rcu_read_unlock();
-
- return file;
-}
-
-EXPORT_SYMBOL(fget);
-
-struct file *fget_raw(unsigned int fd)
-{
- struct file *file;
- struct files_struct *files = current->files;
-
- rcu_read_lock();
- file = fcheck_files(files, fd);
- if (file) {
- /* File object ref couldn't be taken */
- if (!atomic_long_inc_not_zero(&file->f_count))
- file = NULL;
- }
- rcu_read_unlock();
-
- return file;
-}
-
-EXPORT_SYMBOL(fget_raw);
-
-/*
- * Lightweight file lookup - no refcnt increment if fd table isn't shared.
- *
- * You can use this instead of fget if you satisfy all of the following
- * conditions:
- * 1) You must call fput_light before exiting the syscall and returning control
- * to userspace (i.e. you cannot remember the returned struct file * after
- * returning to userspace).
- * 2) You must not call filp_close on the returned struct file * in between
- * calls to fget_light and fput_light.
- * 3) You must not clone the current task in between the calls to fget_light
- * and fput_light.
- *
- * The fput_needed flag returned by fget_light should be passed to the
- * corresponding fput_light.
- */
-struct file *fget_light(unsigned int fd, int *fput_needed)
-{
- struct file *file;
- struct files_struct *files = current->files;
-
- *fput_needed = 0;
- if (atomic_read(&files->count) == 1) {
- file = fcheck_files(files, fd);
- if (file && (file->f_mode & FMODE_PATH))
- file = NULL;
- } else {
- rcu_read_lock();
- file = fcheck_files(files, fd);
- if (file) {
- if (!(file->f_mode & FMODE_PATH) &&
- atomic_long_inc_not_zero(&file->f_count))
- *fput_needed = 1;
- else
- /* Didn't get the reference, someone's freed */
- file = NULL;
- }
- rcu_read_unlock();
- }
-
- return file;
-}
-
-struct file *fget_raw_light(unsigned int fd, int *fput_needed)
-{
- struct file *file;
- struct files_struct *files = current->files;
-
- *fput_needed = 0;
- if (atomic_read(&files->count) == 1) {
- file = fcheck_files(files, fd);
- } else {
- rcu_read_lock();
- file = fcheck_files(files, fd);
- if (file) {
- if (atomic_long_inc_not_zero(&file->f_count))
- *fput_needed = 1;
- else
- /* Didn't get the reference, someone's freed */
- file = NULL;
- }
- rcu_read_unlock();
- }
-
- return file;
-}
-
void put_filp(struct file *file)
{
if (atomic_long_dec_and_test(&file->f_count)) {
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