linux/fs/fs_struct.c, branch v2.6.35.9

Get rid of indirect include of fs_struct.h

2009-04-01T03:00:27Z

Don't pull it in sched.h; very few files actually need it and those can include directly. sched.h itself only needs forward declaration of struct fs_struct; Signed-off-by: Al Viro

New helper - current_umask()

2009-04-01T03:00:26Z

current->fs->umask is what most of fs_struct users are doing. Put that into a helper function. Signed-off-by: Al Viro

New locking/refcounting for fs_struct

2009-04-01T03:00:26Z

* all changes of current->fs are done under task_lock and write_lock of old fs->lock * refcount is not atomic anymore (same protection) * its decrements are done when removing reference from current; at the same time we decide whether to free it. * put_fs_struct() is gone * new field - ->in_exec. Set by check_unsafe_exec() if we are trying to do execve() and only subthreads share fs_struct. Cleared when finishing exec (success and failure alike). Makes CLONE_FS fail with -EAGAIN if set. * check_unsafe_exec() may fail with -EAGAIN if another execve() from subthread is in progress. Signed-off-by: Al Viro

Take fs_struct handling to new file (fs/fs_struct.c)

2009-04-01T03:00:26Z

Pure code move; two new helper functions for nfsd and daemonize (unshare_fs_struct() and daemonize_fs_struct() resp.; for now - the same code as used to be in callers). unshare_fs_struct() exported (for nfsd, as copy_fs_struct()/exit_fs() used to be), copy_fs_struct() and exit_fs() don't need exports anymore. Signed-off-by: Al Viro