user/sven/linux.git/include/linux/fdtable.h, branch v4.0

get rid of files_defer_init()

2014-04-02T03:19:14Z

the only thing it's doing these days is calculation of upper limit for fs.nr_open sysctl and that can be done statically Signed-off-by: Al Viro

introduce __fcheck_files() to fix rcu_dereference_check_fdtable(), kill rcu_my_thread_group_empty()

2014-01-25T08:14:36Z

rcu_dereference_check_fdtable() looks very wrong, 1. rcu_my_thread_group_empty() was added by 844b9a8707f1 "vfs: fix RCU-lockdep false positive due to /proc" but it doesn't really fix the problem. A CLONE_THREAD (without CLONE_FILES) task can hit the same race with get_files_struct(). And otoh rcu_my_thread_group_empty() can suppress the correct warning if the caller is the CLONE_FILES (without CLONE_THREAD) task. 2. files->count == 1 check is not really right too. Even if this files_struct is not shared it is not safe to access it lockless unless the caller is the owner. Otoh, this check is sub-optimal. files->count == 0 always means it is safe to use it lockless even if files != current->files, but put_files_struct() has to take rcu_read_lock(). See the next patch. This patch removes the buggy checks and turns fcheck_files() into __fcheck_files() which uses rcu_dereference_raw(), the "unshared" callers, fget_light() and fget_raw_light(), can use it to avoid the warning from RCU-lockdep. fcheck_files() is trivially reimplemented as rcu_lockdep_assert() plus __fcheck_files(). Signed-off-by: Oleg Nesterov Signed-off-by: Al Viro

don't bother with deferred freeing of fdtables

2013-05-01T21:31:42Z

Signed-off-by: Al Viro

kill daemonize()

2012-11-29T02:49:02Z

Signed-off-by: Al Viro

new helper: daemonize_descriptors()

2012-09-27T01:10:00Z

descriptor-related parts of daemonize, done right. As the result we simplify the locking rules for ->files - we hold task_lock in *all* cases when we modify ->files. Signed-off-by: Al Viro

new helper: iterate_fd()

2012-09-27T01:09:59Z

iterates through the opened files in given descriptor table, calling a supplied function; we stop once non-zero is returned. Callback gets struct file *, descriptor number and const void * argument passed to iterator. It is called with files->file_lock held, so it is not allowed to block. tty_io, netprio_cgroup and selinux flush_unauthorized_files() converted to its use. Signed-off-by: Al Viro

make expand_files() and alloc_fd() static

2012-09-27T01:09:58Z

no callers outside of fs/file.c left Signed-off-by: Al Viro

take __{set,clear}_{open_fd,close_on_exec}() into fs/file.c

2012-09-27T01:09:58Z

nobody uses those outside anymore. Signed-off-by: Al Viro

take close-on-exec logics to fs/file.c, clean it up a bit

2012-09-27T01:09:56Z

... and add cond_resched() there, while we are at it. We can get large latencies as is... Signed-off-by: Al Viro

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

2012-09-27T01:08:56Z

Signed-off-by: Al Viro