sys/kern/uipc_shm.c

114 static void	shm_insert(char *path, Fnv32_t fnv, struct shmfd *shmfd);
115 static struct shmfd *shm_lookup(char *path, Fnv32_t fnv);
116 static int	shm_remove(char *path, Fnv32_t fnv, struct ucred *ucred);
607  * paths to shmfd objects.  We use the FNV hash on the path to store
625 shm_lookup(char *path, Fnv32_t fnv)
632 		if (strcmp(map->sm_path, path) == 0)
640 shm_insert(char *path, Fnv32_t fnv, struct shmfd *shmfd)
645 	map->sm_path = path;
648 	shmfd->shm_path = path;
653 shm_remove(char *path, Fnv32_t fnv, struct ucred *ucred)
661 		if (strcmp(map->sm_path, path) == 0) {
690 	char *path;
718 	/* A SHM_ANON path pointer creates an anonymous object. */
728 		path = malloc(MAXPATHLEN, M_SHMFD, M_WAITOK);
733 		    : strlcpy(path, pr_path, MAXPATHLEN);
734 		error = copyinstr(userpath, path + pr_pathlen,
738 			ktrnamei(path);
741 		if (error == 0 && path[pr_pathlen] != '/')
746 			free(path, M_SHMFD);
750 		fnv = fnv_32_str(path, FNV1_32_INIT);
752 		shmfd = shm_lookup(path, fnv);
758 				    path);
762 					shm_insert(path, fnv, shmfd);
767 				free(path, M_SHMFD);
775 			free(path, M_SHMFD);
828 	return (kern_shm_open(td, uap->path, uap->flags, uap->mode, NULL));
834 	char *path;
840 	path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
843 	    : strlcpy(path, pr_path, MAXPATHLEN);
844 	error = copyinstr(uap->path, path + pr_pathlen, MAXPATHLEN - pr_pathlen,
847 		free(path, M_TEMP);
852 		ktrnamei(path);
854 	fnv = fnv_32_str(path, FNV1_32_INIT);
856 	error = shm_remove(path, fnv, td->td_ucred);
858 	free(path, M_TEMP);
1078 	const char *path, *pr_path;
1092 			path = shmfd->shm_path;
1097 				if (strncmp(path, pr_path, pr_pathlen) == 0 &&
1098 				    path[pr_pathlen] == '/')
1099 					path += pr_pathlen;
1101 			strlcpy(kif->kf_path, path, sizeof(kif->kf_path));