1 // SPDX-License-Identifier: GPL-2.0
30 	if (S_ISSOCK(inode->i_mode) && !(filp->f_mode & FMODE_PATH)) {  in unix_get_socket()
32 		const struct proto_ops *ops = READ_ONCE(sock->ops);  in unix_get_socket()
33 		struct sock *s = sock->sk;  in unix_get_socket()
36 		if (s && ops && ops->family == PF_UNIX)  in unix_get_socket()
56 		if (atomic_long_inc_return(&u->inflight) == 1) {  in unix_inflight()
57 			BUG_ON(!list_empty(&u->link));  in unix_inflight()
58 			list_add_tail(&u->link, &gc_inflight_list);  in unix_inflight()
60 			BUG_ON(list_empty(&u->link));  in unix_inflight()
65 	WRITE_ONCE(user->unix_inflight, user->unix_inflight + 1);  in unix_inflight()
78 		BUG_ON(!atomic_long_read(&u->inflight));  in unix_notinflight()
79 		BUG_ON(list_empty(&u->link));  in unix_notinflight()
81 		if (atomic_long_dec_and_test(&u->inflight))  in unix_notinflight()
82 			list_del_init(&u->link);  in unix_notinflight()
84 		WRITE_ONCE(unix_tot_inflight, unix_tot_inflight - 1);  in unix_notinflight()
86 	WRITE_ONCE(user->unix_inflight, user->unix_inflight - 1);  in unix_notinflight()
91  * The "user->unix_inflight" variable is protected by the garbage
100 	if (unlikely(READ_ONCE(user->unix_inflight) > task_rlimit(p, RLIMIT_NOFILE)))  in too_many_unix_fds()
101 		return !capable(CAP_SYS_RESOURCE) && !capable(CAP_SYS_ADMIN);  in too_many_unix_fds()
110 		return -ETOOMANYREFS;  in unix_attach_fds()
117 	UNIXCB(skb).fp = scm_fp_dup(scm->fp);  in unix_attach_fds()
119 		return -ENOMEM;  in unix_attach_fds()
121 	for (i = scm->fp->count - 1; i >= 0; i--)  in unix_attach_fds()
122 		unix_inflight(scm->fp->user, scm->fp->fp[i]);  in unix_attach_fds()
131 	scm->fp = UNIXCB(skb).fp;  in unix_detach_fds()
134 	for (i = scm->fp->count-1; i >= 0; i--)  in unix_detach_fds()
135 		unix_notinflight(scm->fp->user, scm->fp->fp[i]);  in unix_detach_fds()
149 	/* So fscking what? fput() had been SMP-safe since the last Summer */  in unix_destruct_scm()