35 static int setfl(int fd, struct file * filp, unsigned long arg)  in setfl()  argument
37 	struct inode * inode = file_inode(filp);  in setfl()
44 	if (((arg ^ filp->f_flags) & O_APPEND) && IS_APPEND(inode))  in setfl()
48 	if ((arg & O_NOATIME) && !(filp->f_flags & O_NOATIME))  in setfl()
59 		if (!filp->f_mapping || !filp->f_mapping->a_ops ||  in setfl()
60 			!filp->f_mapping->a_ops->direct_IO)  in setfl()
64 	if (filp->f_op->check_flags)  in setfl()
65 		error = filp->f_op->check_flags(arg);  in setfl()
72 	if (((arg ^ filp->f_flags) & FASYNC) && filp->f_op->fasync) {  in setfl()
73 		error = filp->f_op->fasync(fd, filp, (arg & FASYNC) != 0);  in setfl()
79 	spin_lock(&filp->f_lock);  in setfl()
80 	filp->f_flags = (arg & SETFL_MASK) | (filp->f_flags & ~SETFL_MASK);  in setfl()
81 	spin_unlock(&filp->f_lock);  in setfl()
87 static void f_modown(struct file *filp, struct pid *pid, enum pid_type type,  in f_modown()  argument
90 	write_lock_irq(&filp->f_owner.lock);  in f_modown()
91 	if (force || !filp->f_owner.pid) {  in f_modown()
92 		put_pid(filp->f_owner.pid);  in f_modown()
93 		filp->f_owner.pid = get_pid(pid);  in f_modown()
94 		filp->f_owner.pid_type = type;  in f_modown()
98 			filp->f_owner.uid = cred->uid;  in f_modown()
99 			filp->f_owner.euid = cred->euid;  in f_modown()
102 	write_unlock_irq(&filp->f_owner.lock);  in f_modown()
105 void __f_setown(struct file *filp, struct pid *pid, enum pid_type type,  in __f_setown()  argument
108 	security_file_set_fowner(filp);  in __f_setown()
109 	f_modown(filp, pid, type, force);  in __f_setown()
113 int f_setown(struct file *filp, unsigned long arg, int force)  in f_setown()  argument
137 		__f_setown(filp, pid, type, force);  in f_setown()
144 void f_delown(struct file *filp)  in f_delown()  argument
146 	f_modown(filp, NULL, PIDTYPE_TGID, 1);  in f_delown()
149 pid_t f_getown(struct file *filp)  in f_getown()  argument
152 	read_lock(&filp->f_owner.lock);  in f_getown()
153 	pid = pid_vnr(filp->f_owner.pid);  in f_getown()
154 	if (filp->f_owner.pid_type == PIDTYPE_PGID)  in f_getown()
156 	read_unlock(&filp->f_owner.lock);  in f_getown()
160 static int f_setown_ex(struct file *filp, unsigned long arg)  in f_setown_ex()  argument
194 		 __f_setown(filp, pid, type, 1);  in f_setown_ex()
200 static int f_getown_ex(struct file *filp, unsigned long arg)  in f_getown_ex()  argument
206 	read_lock(&filp->f_owner.lock);  in f_getown_ex()
207 	owner.pid = pid_vnr(filp->f_owner.pid);  in f_getown_ex()
208 	switch (filp->f_owner.pid_type) {  in f_getown_ex()
226 	read_unlock(&filp->f_owner.lock);  in f_getown_ex()
237 static int f_getowner_uids(struct file *filp, unsigned long arg)  in f_getowner_uids()  argument
244 	read_lock(&filp->f_owner.lock);  in f_getowner_uids()
245 	src[0] = from_kuid(user_ns, filp->f_owner.uid);  in f_getowner_uids()
246 	src[1] = from_kuid(user_ns, filp->f_owner.euid);  in f_getowner_uids()
247 	read_unlock(&filp->f_owner.lock);  in f_getowner_uids()
255 static int f_getowner_uids(struct file *filp, unsigned long arg)  in f_getowner_uids()  argument
323 		struct file *filp)  in do_fcntl()  argument
331 		err = f_dupfd(arg, filp, 0);  in do_fcntl()
334 		err = f_dupfd(arg, filp, O_CLOEXEC);  in do_fcntl()
344 		err = filp->f_flags;  in do_fcntl()
347 		err = setfl(fd, filp, arg);  in do_fcntl()
356 		err = fcntl_getlk(filp, cmd, &flock);  in do_fcntl()
370 		err = fcntl_setlk(fd, filp, cmd, &flock);  in do_fcntl()
380 		err = f_getown(filp);  in do_fcntl()
384 		err = f_setown(filp, arg, 1);  in do_fcntl()
387 		err = f_getown_ex(filp, arg);  in do_fcntl()
390 		err = f_setown_ex(filp, arg);  in do_fcntl()
393 		err = f_getowner_uids(filp, arg);  in do_fcntl()
396 		err = filp->f_owner.signum;  in do_fcntl()
404 		filp->f_owner.signum = arg;  in do_fcntl()
407 		err = fcntl_getlease(filp);  in do_fcntl()
410 		err = fcntl_setlease(fd, filp, arg);  in do_fcntl()
413 		err = fcntl_dirnotify(fd, filp, arg);  in do_fcntl()
417 		err = pipe_fcntl(filp, cmd, arg);  in do_fcntl()
421 		err = memfd_fcntl(filp, cmd, arg);  in do_fcntl()
427 		err = fcntl_rw_hint(filp, cmd, arg);  in do_fcntl()
867 int fasync_remove_entry(struct file *filp, struct fasync_struct **fapp)  in fasync_remove_entry()  argument
872 	spin_lock(&filp->f_lock);  in fasync_remove_entry()
875 		if (fa->fa_file != filp)  in fasync_remove_entry()
884 		filp->f_flags &= ~FASYNC;  in fasync_remove_entry()
889 	spin_unlock(&filp->f_lock);  in fasync_remove_entry()
915 struct fasync_struct *fasync_insert_entry(int fd, struct file *filp, struct fasync_struct **fapp, s…  in fasync_insert_entry()  argument
919 	spin_lock(&filp->f_lock);  in fasync_insert_entry()
922 		if (fa->fa_file != filp)  in fasync_insert_entry()
933 	new->fa_file = filp;  in fasync_insert_entry()
937 	filp->f_flags |= FASYNC;  in fasync_insert_entry()
941 	spin_unlock(&filp->f_lock);  in fasync_insert_entry()
949 static int fasync_add_entry(int fd, struct file *filp, struct fasync_struct **fapp)  in fasync_add_entry()  argument
964 	if (fasync_insert_entry(fd, filp, fapp, new)) {  in fasync_add_entry()
978 int fasync_helper(int fd, struct file * filp, int on, struct fasync_struct **fapp)  in fasync_helper()  argument
981 		return fasync_remove_entry(filp, fapp);  in fasync_helper()
982 	return fasync_add_entry(fd, filp, fapp);  in fasync_helper()