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take descriptor-related part of close() to file.c

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Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Al Viro 2012-08-19 12:04:24 -04:00
commit 483ce1d4b8
4 changed files with 31 additions and 53 deletions
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26
fs/file.c
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@ -626,6 +626,32 @@ void fd_install(unsigned int fd, struct file *file)
EXPORT_SYMBOL(fd_install);
/*
* The same warnings as for __alloc_fd()/__fd_install() apply here...
*/
int __close_fd(struct files_struct *files, unsigned fd)
{
struct file *file;
struct fdtable *fdt;
spin_lock(&files->file_lock);
fdt = files_fdtable(files);
if (fd >= fdt->max_fds)
goto out_unlock;
file = fdt->fd[fd];
if (!file)
goto out_unlock;
rcu_assign_pointer(fdt->fd[fd], NULL);
__clear_close_on_exec(fd, fdt);
__put_unused_fd(files, fd);
spin_unlock(&files->file_lock);
return filp_close(file, files);
out_unlock:
spin_unlock(&files->file_lock);
return -EBADF;
}
struct file *fget(unsigned int fd)
{
struct file *file;