27 	struct fs_context *fc = file->private_data;  in fscontext_read()  local
28 	struct fc_log *log = fc->log.log;  in fscontext_read()
35 	ret = mutex_lock_interruptible(&fc->uapi_mutex);  in fscontext_read()
40 		mutex_unlock(&fc->uapi_mutex);  in fscontext_read()
50 	mutex_unlock(&fc->uapi_mutex);  in fscontext_read()
69 	struct fs_context *fc = file->private_data;  in fscontext_release()  local
71 	if (fc) {  in fscontext_release()
73 		put_fs_context(fc);  in fscontext_release()
86 static int fscontext_create_fd(struct fs_context *fc, unsigned int o_flags)  in fscontext_create_fd()  argument
90 	fd = anon_inode_getfd("[fscontext]", &fscontext_fops, fc,  in fscontext_create_fd()
93 		put_fs_context(fc);  in fscontext_create_fd()
97 static int fscontext_alloc_log(struct fs_context *fc)  in fscontext_alloc_log()  argument
99 	fc->log.log = kzalloc(sizeof(*fc->log.log), GFP_KERNEL);  in fscontext_alloc_log()
100 	if (!fc->log.log)  in fscontext_alloc_log()
102 	refcount_set(&fc->log.log->usage, 1);  in fscontext_alloc_log()
103 	fc->log.log->owner = fc->fs_type->owner;  in fscontext_alloc_log()
117 	struct fs_context *fc;  in SYSCALL_DEFINE2()  local
136 	fc = fs_context_for_mount(fs_type, 0);  in SYSCALL_DEFINE2()
138 	if (IS_ERR(fc))  in SYSCALL_DEFINE2()
139 		return PTR_ERR(fc);  in SYSCALL_DEFINE2()
141 	fc->phase = FS_CONTEXT_CREATE_PARAMS;  in SYSCALL_DEFINE2()
143 	ret = fscontext_alloc_log(fc);  in SYSCALL_DEFINE2()
147 	return fscontext_create_fd(fc, flags & FSOPEN_CLOEXEC ? O_CLOEXEC : 0);  in SYSCALL_DEFINE2()
150 	put_fs_context(fc);  in SYSCALL_DEFINE2()
159 	struct fs_context *fc;  in SYSCALL_DEFINE3()  local
188 	fc = fs_context_for_reconfigure(target.dentry, 0, 0);  in SYSCALL_DEFINE3()
189 	if (IS_ERR(fc)) {  in SYSCALL_DEFINE3()
190 		ret = PTR_ERR(fc);  in SYSCALL_DEFINE3()
194 	fc->phase = FS_CONTEXT_RECONF_PARAMS;  in SYSCALL_DEFINE3()
196 	ret = fscontext_alloc_log(fc);  in SYSCALL_DEFINE3()
201 	return fscontext_create_fd(fc, flags & FSPICK_CLOEXEC ? O_CLOEXEC : 0);  in SYSCALL_DEFINE3()
204 	put_fs_context(fc);  in SYSCALL_DEFINE3()
211 static int vfs_cmd_create(struct fs_context *fc, bool exclusive)  in vfs_cmd_create()  argument
216 	if (fc->phase != FS_CONTEXT_CREATE_PARAMS)  in vfs_cmd_create()
219 	if (!mount_capable(fc))  in vfs_cmd_create()
222 	fc->phase = FS_CONTEXT_CREATING;  in vfs_cmd_create()
223 	fc->exclusive = exclusive;  in vfs_cmd_create()
225 	ret = vfs_get_tree(fc);  in vfs_cmd_create()
227 		fc->phase = FS_CONTEXT_FAILED;  in vfs_cmd_create()
231 	sb = fc->root->d_sb;  in vfs_cmd_create()
234 		fc_drop_locked(fc);  in vfs_cmd_create()
235 		fc->phase = FS_CONTEXT_FAILED;  in vfs_cmd_create()
241 	fc->phase = FS_CONTEXT_AWAITING_MOUNT;  in vfs_cmd_create()
245 static int vfs_cmd_reconfigure(struct fs_context *fc)  in vfs_cmd_reconfigure()  argument
250 	if (fc->phase != FS_CONTEXT_RECONF_PARAMS)  in vfs_cmd_reconfigure()
253 	fc->phase = FS_CONTEXT_RECONFIGURING;  in vfs_cmd_reconfigure()
255 	sb = fc->root->d_sb;  in vfs_cmd_reconfigure()
257 		fc->phase = FS_CONTEXT_FAILED;  in vfs_cmd_reconfigure()
262 	ret = reconfigure_super(fc);  in vfs_cmd_reconfigure()
265 		fc->phase = FS_CONTEXT_FAILED;  in vfs_cmd_reconfigure()
269 	vfs_clean_context(fc);  in vfs_cmd_reconfigure()
277 static int vfs_fsconfig_locked(struct fs_context *fc, int cmd,  in vfs_fsconfig_locked()  argument
282 	ret = finish_clean_context(fc);  in vfs_fsconfig_locked()
287 		return vfs_cmd_create(fc, false);  in vfs_fsconfig_locked()
289 		return vfs_cmd_create(fc, true);  in vfs_fsconfig_locked()
291 		return vfs_cmd_reconfigure(fc);  in vfs_fsconfig_locked()
293 		if (fc->phase != FS_CONTEXT_CREATE_PARAMS &&  in vfs_fsconfig_locked()
294 		    fc->phase != FS_CONTEXT_RECONF_PARAMS)  in vfs_fsconfig_locked()
297 		return vfs_parse_fs_param(fc, param);  in vfs_fsconfig_locked()
351 	struct fs_context *fc;  in SYSCALL_DEFINE5()  local
402 	fc = fd_file(f)->private_data;  in SYSCALL_DEFINE5()
403 	if (fc->ops == &legacy_fs_context_ops) {  in SYSCALL_DEFINE5()
470 	ret = mutex_lock_interruptible(&fc->uapi_mutex);  in SYSCALL_DEFINE5()
472 		ret = vfs_fsconfig_locked(fc, cmd, &param);  in SYSCALL_DEFINE5()
473 		mutex_unlock(&fc->uapi_mutex);  in SYSCALL_DEFINE5()