91 struct fs {  struct
103 static void fs__init_once(struct fs *fs);  argument
104 static const char *fs__mountpoint(const struct fs *fs);
105 static const char *fs__mount(struct fs *fs);
108 static struct fs fs__##lower_name = {			\
117 	struct fs *fs = &fs__##lower_name;		\
119 	fs__init_once(fs);				\
125 	struct fs *fs = &fs__##lower_name;		\
128 	return fs__mountpoint(fs);			\
134 	struct fs *fs = &fs__##lower_name;		\
139 	return fs__mount(fs);				\
154 static bool fs__read_mounts(struct fs *fs)  in fs__read_mounts()  argument
167 		if (strcmp(type, fs->name) == 0) {  in fs__read_mounts()
168 			fs->path = strdup(path);  in fs__read_mounts()
170 			return fs->path != NULL;  in fs__read_mounts()
177 static int fs__valid_mount(const char *fs, long magic)  in fs__valid_mount()  argument
181 	if (statfs(fs, &st_fs) < 0)  in fs__valid_mount()
189 static bool fs__check_mounts(struct fs *fs)  in fs__check_mounts()  argument
193 	ptr = fs->mounts;  in fs__check_mounts()
195 		if (fs__valid_mount(*ptr, fs->magic) == 0) {  in fs__check_mounts()
196 			fs->path = strdup(*ptr);  in fs__check_mounts()
197 			if (!fs->path)  in fs__check_mounts()
221 static bool fs__env_override(struct fs *fs)  in fs__env_override()  argument
224 	size_t name_len = strlen(fs->name);  in fs__env_override()
228 	memcpy(upper_name, fs->name, name_len);  in fs__env_override()
236 	fs->path = strdup(override_path);  in fs__env_override()
237 	if (!fs->path)  in fs__env_override()
242 static void fs__init_once(struct fs *fs)  in fs__init_once()  argument
244 	if (!fs__env_override(fs) &&  in fs__init_once()
245 	    !fs__check_mounts(fs) &&  in fs__init_once()
246 	    !fs__read_mounts(fs)) {  in fs__init_once()
247 		assert(!fs->path);  in fs__init_once()
249 		assert(fs->path);  in fs__init_once()
253 static const char *fs__mountpoint(const struct fs *fs)  in fs__mountpoint()  argument
255 	return fs->path;  in fs__mountpoint()
258 static const char *mount_overload(struct fs *fs)  in mount_overload()  argument
260 	size_t name_len = strlen(fs->name);  in mount_overload()
264 	snprintf(upper_name, name_len, "PERF_%s_ENVIRONMENT", fs->name);  in mount_overload()
267 	return getenv(upper_name) ?: *fs->mounts;  in mount_overload()
270 static const char *fs__mount(struct fs *fs)  in fs__mount()  argument
274 	pthread_mutex_lock(&fs->mount_mutex);  in fs__mount()
277 	mountpoint = fs__mountpoint(fs);  in fs__mount()
281 	mountpoint = mount_overload(fs);  in fs__mount()
283 	if (mount(NULL, mountpoint, fs->name, 0, NULL) == 0 &&  in fs__mount()
284 	    fs__valid_mount(mountpoint, fs->magic) == 0) {  in fs__mount()
285 		fs->path = strdup(mountpoint);  in fs__mount()
286 		mountpoint = fs->path;  in fs__mount()
289 	pthread_mutex_unlock(&fs->mount_mutex);  in fs__mount()