90 struct fs {  struct
102 static void fs__init_once(struct fs *fs);  argument
103 static const char *fs__mountpoint(const struct fs *fs);
104 static const char *fs__mount(struct fs *fs);
107 static struct fs fs__##lower_name = {			\
116 	struct fs *fs = &fs__##lower_name;		\
118 	fs__init_once(fs);				\
124 	struct fs *fs = &fs__##lower_name;		\
127 	return fs__mountpoint(fs);			\
133 	struct fs *fs = &fs__##lower_name;		\
138 	return fs__mount(fs);				\
153 static bool fs__read_mounts(struct fs *fs)  in fs__read_mounts()  argument
166 		if (strcmp(type, fs->name) == 0) {  in fs__read_mounts()
167 			fs->path = strdup(path);  in fs__read_mounts()
169 			return fs->path != NULL;  in fs__read_mounts()
176 static int fs__valid_mount(const char *fs, long magic)  in fs__valid_mount()  argument
180 	if (statfs(fs, &st_fs) < 0)  in fs__valid_mount()
188 static bool fs__check_mounts(struct fs *fs)  in fs__check_mounts()  argument
192 	ptr = fs->mounts;  in fs__check_mounts()
194 		if (fs__valid_mount(*ptr, fs->magic) == 0) {  in fs__check_mounts()
195 			fs->path = strdup(*ptr);  in fs__check_mounts()
196 			if (!fs->path)  in fs__check_mounts()
220 static bool fs__env_override(struct fs *fs)  in fs__env_override()  argument
223 	size_t name_len = strlen(fs->name);  in fs__env_override()
227 	memcpy(upper_name, fs->name, name_len);  in fs__env_override()
235 	fs->path = strdup(override_path);  in fs__env_override()
236 	if (!fs->path)  in fs__env_override()
241 static void fs__init_once(struct fs *fs)  in fs__init_once()  argument
243 	if (!fs__env_override(fs) &&  in fs__init_once()
244 	    !fs__check_mounts(fs) &&  in fs__init_once()
245 	    !fs__read_mounts(fs)) {  in fs__init_once()
246 		assert(!fs->path);  in fs__init_once()
248 		assert(fs->path);  in fs__init_once()
252 static const char *fs__mountpoint(const struct fs *fs)  in fs__mountpoint()  argument
254 	return fs->path;  in fs__mountpoint()
257 static const char *mount_overload(struct fs *fs)  in mount_overload()  argument
259 	size_t name_len = strlen(fs->name);  in mount_overload()
263 	snprintf(upper_name, name_len, "PERF_%s_ENVIRONMENT", fs->name);  in mount_overload()
266 	return getenv(upper_name) ?: *fs->mounts;  in mount_overload()
269 static const char *fs__mount(struct fs *fs)  in fs__mount()  argument
273 	pthread_mutex_lock(&fs->mount_mutex);  in fs__mount()
276 	mountpoint = fs__mountpoint(fs);  in fs__mount()
280 	mountpoint = mount_overload(fs);  in fs__mount()
282 	if (mount(NULL, mountpoint, fs->name, 0, NULL) == 0 &&  in fs__mount()
283 	    fs__valid_mount(mountpoint, fs->magic) == 0) {  in fs__mount()
284 		fs->path = strdup(mountpoint);  in fs__mount()
285 		mountpoint = fs->path;  in fs__mount()
288 	pthread_mutex_unlock(&fs->mount_mutex);  in fs__mount()