32 static int setfl(int fd, struct file * filp, unsigned long arg)  in setfl()  argument
34 	struct inode * inode = file_inode(filp);  in setfl()
41 	if (((arg ^ filp->f_flags) & O_APPEND) && IS_APPEND(inode))  in setfl()
45 	if ((arg & O_NOATIME) && !(filp->f_flags & O_NOATIME))  in setfl()
55 		if (!filp->f_mapping || !filp->f_mapping->a_ops ||  in setfl()
56 			!filp->f_mapping->a_ops->direct_IO)  in setfl()
60 	if (filp->f_op->check_flags)  in setfl()
61 		error = filp->f_op->check_flags(arg);  in setfl()
68 	if (((arg ^ filp->f_flags) & FASYNC) && filp->f_op->fasync) {  in setfl()
69 		error = filp->f_op->fasync(fd, filp, (arg & FASYNC) != 0);  in setfl()
75 	spin_lock(&filp->f_lock);  in setfl()
76 	filp->f_flags = (arg & SETFL_MASK) | (filp->f_flags & ~SETFL_MASK);  in setfl()
77 	spin_unlock(&filp->f_lock);  in setfl()
83 static void f_modown(struct file *filp, struct pid *pid, enum pid_type type,  in f_modown()  argument
86 	write_lock_irq(&filp->f_owner.lock);  in f_modown()
87 	if (force || !filp->f_owner.pid) {  in f_modown()
88 		put_pid(filp->f_owner.pid);  in f_modown()
89 		filp->f_owner.pid = get_pid(pid);  in f_modown()
90 		filp->f_owner.pid_type = type;  in f_modown()
94 			filp->f_owner.uid = cred->uid;  in f_modown()
95 			filp->f_owner.euid = cred->euid;  in f_modown()
98 	write_unlock_irq(&filp->f_owner.lock);  in f_modown()
101 void __f_setown(struct file *filp, struct pid *pid, enum pid_type type,  in __f_setown()  argument
104 	security_file_set_fowner(filp);  in __f_setown()
105 	f_modown(filp, pid, type, force);  in __f_setown()
109 void f_setown(struct file *filp, unsigned long arg, int force)  in f_setown()  argument
121 	__f_setown(filp, pid, type, force);  in f_setown()
126 void f_delown(struct file *filp)  in f_delown()  argument
128 	f_modown(filp, NULL, PIDTYPE_PID, 1);  in f_delown()
131 pid_t f_getown(struct file *filp)  in f_getown()  argument
134 	read_lock(&filp->f_owner.lock);  in f_getown()
135 	pid = pid_vnr(filp->f_owner.pid);  in f_getown()
136 	if (filp->f_owner.pid_type == PIDTYPE_PGID)  in f_getown()
138 	read_unlock(&filp->f_owner.lock);  in f_getown()
142 static int f_setown_ex(struct file *filp, unsigned long arg)  in f_setown_ex()  argument
176 		 __f_setown(filp, pid, type, 1);  in f_setown_ex()
182 static int f_getown_ex(struct file *filp, unsigned long arg)  in f_getown_ex()  argument
188 	read_lock(&filp->f_owner.lock);  in f_getown_ex()
189 	owner.pid = pid_vnr(filp->f_owner.pid);  in f_getown_ex()
190 	switch (filp->f_owner.pid_type) {  in f_getown_ex()
208 	read_unlock(&filp->f_owner.lock);  in f_getown_ex()
219 static int f_getowner_uids(struct file *filp, unsigned long arg)  in f_getowner_uids()  argument
226 	read_lock(&filp->f_owner.lock);  in f_getowner_uids()
227 	src[0] = from_kuid(user_ns, filp->f_owner.uid);  in f_getowner_uids()
228 	src[1] = from_kuid(user_ns, filp->f_owner.euid);  in f_getowner_uids()
229 	read_unlock(&filp->f_owner.lock);  in f_getowner_uids()
237 static int f_getowner_uids(struct file *filp, unsigned long arg)  in f_getowner_uids()  argument
244 		struct file *filp)  in do_fcntl()  argument
250 		err = f_dupfd(arg, filp, 0);  in do_fcntl()
253 		err = f_dupfd(arg, filp, O_CLOEXEC);  in do_fcntl()
263 		err = filp->f_flags;  in do_fcntl()
266 		err = setfl(fd, filp, arg);  in do_fcntl()
273 		err = fcntl_getlk(filp, cmd, (struct flock __user *) arg);  in do_fcntl()
283 		err = fcntl_setlk(fd, filp, cmd, (struct flock __user *) arg);  in do_fcntl()
293 		err = f_getown(filp);  in do_fcntl()
297 		f_setown(filp, arg, 1);  in do_fcntl()
301 		err = f_getown_ex(filp, arg);  in do_fcntl()
304 		err = f_setown_ex(filp, arg);  in do_fcntl()
307 		err = f_getowner_uids(filp, arg);  in do_fcntl()
310 		err = filp->f_owner.signum;  in do_fcntl()
318 		filp->f_owner.signum = arg;  in do_fcntl()
321 		err = fcntl_getlease(filp);  in do_fcntl()
324 		err = fcntl_setlease(fd, filp, arg);  in do_fcntl()
327 		err = fcntl_dirnotify(fd, filp, arg);  in do_fcntl()
331 		err = pipe_fcntl(filp, cmd, arg);  in do_fcntl()
335 		err = shmem_fcntl(filp, cmd, arg);  in do_fcntl()
575 int fasync_remove_entry(struct file *filp, struct fasync_struct **fapp)  in fasync_remove_entry()  argument
580 	spin_lock(&filp->f_lock);  in fasync_remove_entry()
583 		if (fa->fa_file != filp)  in fasync_remove_entry()
592 		filp->f_flags &= ~FASYNC;  in fasync_remove_entry()
597 	spin_unlock(&filp->f_lock);  in fasync_remove_entry()
623 struct fasync_struct *fasync_insert_entry(int fd, struct file *filp, struct fasync_struct **fapp, s…  in fasync_insert_entry()  argument
627 	spin_lock(&filp->f_lock);  in fasync_insert_entry()
630 		if (fa->fa_file != filp)  in fasync_insert_entry()
641 	new->fa_file = filp;  in fasync_insert_entry()
645 	filp->f_flags |= FASYNC;  in fasync_insert_entry()
649 	spin_unlock(&filp->f_lock);  in fasync_insert_entry()
657 static int fasync_add_entry(int fd, struct file *filp, struct fasync_struct **fapp)  in fasync_add_entry()  argument
672 	if (fasync_insert_entry(fd, filp, fapp, new)) {  in fasync_add_entry()
686 int fasync_helper(int fd, struct file * filp, int on, struct fasync_struct **fapp)  in fasync_helper()  argument
689 		return fasync_remove_entry(filp, fapp);  in fasync_helper()
690 	return fasync_add_entry(fd, filp, fapp);  in fasync_helper()