Merge branch 'merge.nfs-fs_parse.1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull vfs file system parameter updates from Al Viro:
 "Saner fs_parser.c guts and data structures. The system-wide registry
  of syntax types (string/enum/int32/oct32/.../etc.) is gone and so is
  the horror switch() in fs_parse() that would have to grow another case
  every time something got added to that system-wide registry.

  New syntax types can be added by filesystems easily now, and their
  namespace is that of functions - not of system-wide enum members. IOW,
  they can be shared or kept private and if some turn out to be widely
  useful, we can make them common library helpers, etc., without having
  to do anything whatsoever to fs_parse() itself.

  And we already get that kind of requests - the thing that finally
  pushed me into doing that was "oh, and let's add one for timeouts -
  things like 15s or 2h". If some filesystem really wants that, let them
  do it. Without somebody having to play gatekeeper for the variants
  blessed by direct support in fs_parse(), TYVM.

  Quite a bit of boilerplate is gone. And IMO the data structures make a
  lot more sense now. -200LoC, while we are at it"

* 'merge.nfs-fs_parse.1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (25 commits)
  tmpfs: switch to use of invalfc()
  cgroup1: switch to use of errorfc() et.al.
  procfs: switch to use of invalfc()
  hugetlbfs: switch to use of invalfc()
  cramfs: switch to use of errofc() et.al.
  gfs2: switch to use of errorfc() et.al.
  fuse: switch to use errorfc() et.al.
  ceph: use errorfc() and friends instead of spelling the prefix out
  prefix-handling analogues of errorf() and friends
  turn fs_param_is_... into functions
  fs_parse: handle optional arguments sanely
  fs_parse: fold fs_parameter_desc/fs_parameter_spec
  fs_parser: remove fs_parameter_description name field
  add prefix to fs_context->log
  ceph_parse_param(), ceph_parse_mon_ips(): switch to passing fc_log
  new primitive: __fs_parse()
  switch rbd and libceph to p_log-based primitives
  struct p_log, variants of warnf() et.al. taking that one instead
  teach logfc() to handle prefices, give it saner calling conventions
  get rid of cg_invalf()
  ...

37 files changed, 562 insertions, 782 deletions

diff --git a/Documentation/filesystems/mount_api.txt b/Documentation/filesystems/mount_api.txt
index 00ff0cfccfa7..87c14bbb2b35 100644
--- a/Documentation/filesystems/mount_api.txt
+++ b/Documentation/filesystems/mount_api.txt
@@ -427,7 +427,6 @@ returned.
 	fs_value_is_string,		Value is a string
 	fs_value_is_blob,		Value is a binary blob
 	fs_value_is_filename,		Value is a filename* + dirfd
-	fs_value_is_filename_empty,	Value is a filename* + dirfd + AT_EMPTY_PATH
 	fs_value_is_file,		Value is an open file (file*)
 
      If there is a value, that value is stored in a union in the struct in one
@@ -519,7 +518,6 @@ Parameters are described using structures defined in linux/fs_parser.h.
 There's a core description struct that links everything together:
 
 	struct fs_parameter_description {
-		const char	name[16];
 		const struct fs_parameter_spec *specs;
 		const struct fs_parameter_enum *enums;
 	};
@@ -535,19 +533,13 @@ For example:
 	};
 
 	static const struct fs_parameter_description afs_fs_parameters = {
-		.name		= "kAFS",
 		.specs		= afs_param_specs,
 		.enums		= afs_param_enums,
 	};
 
 The members are as follows:
 
- (1) const char name[16];
-
-     The name to be used in error messages generated by the parse helper
-     functions.
-
- (2) const struct fs_parameter_specification *specs;
+ (1) const struct fs_parameter_specification *specs;
 
      Table of parameter specifications, terminated with a null entry, where the
      entries are of type:
@@ -626,7 +618,7 @@ The members are as follows:
      of arguments to specify the type and the flags for anything that doesn't
      match one of the above macros.
 
- (6) const struct fs_parameter_enum *enums;
+ (2) const struct fs_parameter_enum *enums;
 
      Table of enum value names to integer mappings, terminated with a null
      entry.  This is of type:
diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
index 9b1586b85152..25390569e24c 100644
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -583,7 +583,7 @@ enum {
 	Opt_uid, Opt_gid, Opt_mode, Opt_debug,
 };
 
-static const struct fs_parameter_spec spufs_param_specs[] = {
+static const struct fs_parameter_spec spufs_fs_parameters[] = {
 	fsparam_u32	("gid",				Opt_gid),
 	fsparam_u32oct	("mode",			Opt_mode),
 	fsparam_u32	("uid",				Opt_uid),
@@ -591,11 +591,6 @@ static const struct fs_parameter_spec spufs_param_specs[] = {
 	{}
 };
 
-static const struct fs_parameter_description spufs_fs_parameters = {
-	.name		= "spufs",
-	.specs		= spufs_param_specs,
-};
-
 static int spufs_show_options(struct seq_file *m, struct dentry *root)
 {
 	struct spufs_sb_info *sbi = spufs_get_sb_info(root->d_sb);
@@ -623,7 +618,7 @@ static int spufs_parse_param(struct fs_context *fc, struct fs_parameter *param)
 	kgid_t gid;
 	int opt;
 
-	opt = fs_parse(fc, &spufs_fs_parameters, param, &result);
+	opt = fs_parse(fc, spufs_fs_parameters, param, &result);
 	if (opt < 0)
 		return opt;
 
@@ -774,7 +769,7 @@ static struct file_system_type spufs_type = {
 	.owner = THIS_MODULE,
 	.name = "spufs",
 	.init_fs_context = spufs_init_fs_context,
-	.parameters	= &spufs_fs_parameters,
+	.parameters	= spufs_fs_parameters,
 	.kill_sb = kill_litter_super,
 };
 MODULE_ALIAS_FS("spufs");
diff --git a/arch/s390/hypfs/inode.c b/arch/s390/hypfs/inode.c
index 70139d0791b6..5c97f48cea91 100644
--- a/arch/s390/hypfs/inode.c
+++ b/arch/s390/hypfs/inode.c
@@ -209,17 +209,12 @@ static int hypfs_release(struct inode *inode, struct file *filp)
 
 enum { Opt_uid, Opt_gid, };
 
-static const struct fs_parameter_spec hypfs_param_specs[] = {
+static const struct fs_parameter_spec hypfs_fs_parameters[] = {
 	fsparam_u32("gid", Opt_gid),
 	fsparam_u32("uid", Opt_uid),
 	{}
 };
 
-static const struct fs_parameter_description hypfs_fs_parameters = {
-	.name		= "hypfs",
-	.specs		= hypfs_param_specs,
-};
-
 static int hypfs_parse_param(struct fs_context *fc, struct fs_parameter *param)
 {
 	struct hypfs_sb_info *hypfs_info = fc->s_fs_info;
@@ -228,7 +223,7 @@ static int hypfs_parse_param(struct fs_context *fc, struct fs_parameter *param)
 	kgid_t gid;
 	int opt;
 
-	opt = fs_parse(fc, &hypfs_fs_parameters, param, &result);
+	opt = fs_parse(fc, hypfs_fs_parameters, param, &result);
 	if (opt < 0)
 		return opt;
 
@@ -455,7 +450,7 @@ static struct file_system_type hypfs_type = {
 	.owner		= THIS_MODULE,
 	.name		= "s390_hypfs",
 	.init_fs_context = hypfs_init_fs_context,
-	.parameters	= &hypfs_fs_parameters,
+	.parameters	= hypfs_fs_parameters,
 	.kill_sb	= hypfs_kill_super
 };
 
diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
index 8ca5e510f3ce..064e9ef44cd6 100644
--- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
+++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
@@ -2127,25 +2127,20 @@ enum rdt_param {
 	nr__rdt_params
 };
 
-static const struct fs_parameter_spec rdt_param_specs[] = {
+static const struct fs_parameter_spec rdt_fs_parameters[] = {
 	fsparam_flag("cdp",		Opt_cdp),
 	fsparam_flag("cdpl2",		Opt_cdpl2),
 	fsparam_flag("mba_MBps",	Opt_mba_mbps),
 	{}
 };
 
-static const struct fs_parameter_description rdt_fs_parameters = {
-	.name		= "rdt",
-	.specs		= rdt_param_specs,
-};
-
 static int rdt_parse_param(struct fs_context *fc, struct fs_parameter *param)
 {
 	struct rdt_fs_context *ctx = rdt_fc2context(fc);
 	struct fs_parse_result result;
 	int opt;
 
-	opt = fs_parse(fc, &rdt_fs_parameters, param, &result);
+	opt = fs_parse(fc, rdt_fs_parameters, param, &result);
 	if (opt < 0)
 		return opt;
 
@@ -2378,7 +2373,7 @@ static void rdt_kill_sb(struct super_block *sb)
 static struct file_system_type rdt_fs_type = {
 	.name			= "resctrl",
 	.init_fs_context	= rdt_init_fs_context,
-	.parameters		= &rdt_fs_parameters,
+	.parameters		= rdt_fs_parameters,
 	.kill_sb		= rdt_kill_sb,
 };
 
diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c
index 5995c437cbdf..c9017e0584c0 100644
--- a/drivers/base/devtmpfs.c
+++ b/drivers/base/devtmpfs.c
@@ -67,10 +67,10 @@ static struct file_system_type internal_fs_type = {
 	.name = "devtmpfs",
 #ifdef CONFIG_TMPFS
 	.init_fs_context = shmem_init_fs_context,
-	.parameters	= &shmem_fs_parameters,
+	.parameters	= shmem_fs_parameters,
 #else
 	.init_fs_context = ramfs_init_fs_context,
-	.parameters	= &ramfs_fs_parameters,
+	.parameters	= ramfs_fs_parameters,
 #endif
 	.kill_sb = kill_litter_super,
 };
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 405b66e09040..6343402c09e6 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -848,7 +848,7 @@ enum {
 	Opt_notrim,
 };
 
-static const struct fs_parameter_spec rbd_param_specs[] = {
+static const struct fs_parameter_spec rbd_parameters[] = {
 	fsparam_u32	("alloc_size",			Opt_alloc_size),
 	fsparam_flag	("exclusive",			Opt_exclusive),
 	fsparam_flag	("lock_on_read",		Opt_lock_on_read),
@@ -863,11 +863,6 @@ static const struct fs_parameter_spec rbd_param_specs[] = {
 	{}
 };
 
-static const struct fs_parameter_description rbd_parameters = {
-	.name		= "rbd",
-	.specs		= rbd_param_specs,
-};
-
 struct rbd_options {
 	int	queue_depth;
 	int	alloc_size;
@@ -6353,19 +6348,19 @@ static int rbd_parse_param(struct fs_parameter *param,
 {
 	struct rbd_options *opt = pctx->opts;
 	struct fs_parse_result result;
+	struct p_log log = {.prefix = "rbd"};
 	int token, ret;
 
 	ret = ceph_parse_param(param, pctx->copts, NULL);
 	if (ret != -ENOPARAM)
 		return ret;
 
-	token = fs_parse(NULL, &rbd_parameters, param, &result);
+	token = __fs_parse(&log, rbd_parameters, param, &result);
 	dout("%s fs_parse '%s' token %d\n", __func__, param->key, token);
 	if (token < 0) {
-		if (token == -ENOPARAM) {
-			return invalf(NULL, "rbd: Unknown parameter '%s'",
-				      param->key);
-		}
+		if (token == -ENOPARAM)
+			return inval_plog(&log, "Unknown parameter '%s'",
+					  param->key);
 		return token;
 	}
 
@@ -6378,9 +6373,8 @@ static int rbd_parse_param(struct fs_parameter *param,
 	case Opt_alloc_size:
 		if (result.uint_32 < SECTOR_SIZE)
 			goto out_of_range;
-		if (!is_power_of_2(result.uint_32)) {
-			return invalf(NULL, "rbd: alloc_size must be a power of 2");
-		}
+		if (!is_power_of_2(result.uint_32))
+			return inval_plog(&log, "alloc_size must be a power of 2");
 		opt->alloc_size = result.uint_32;
 		break;
 	case Opt_lock_timeout:
@@ -6416,7 +6410,7 @@ static int rbd_parse_param(struct fs_parameter *param,
 	return 0;
 
 out_of_range:
-	return invalf(NULL, "rbd: %s out of range", param->key);
+	return inval_plog(&log, "%s out of range", param->key);
 }
 
 /*
@@ -6433,7 +6427,7 @@ static int rbd_parse_options(char *options, struct rbd_parse_opts_ctx *pctx)
 		if (*key) {
 			struct fs_parameter param = {
 				.key	= key,
-				.type	= fs_value_is_string,
+				.type	= fs_value_is_flag,
 			};
 			char *value = strchr(key, '=');
 			size_t v_len = 0;
@@ -6443,14 +6437,11 @@ static int rbd_parse_options(char *options, struct rbd_parse_opts_ctx *pctx)
 					continue;
 				*value++ = 0;
 				v_len = strlen(value);
-			}
-
-
-			if (v_len > 0) {
 				param.string = kmemdup_nul(value, v_len,
 							   GFP_KERNEL);
 				if (!param.string)
 					return -ENOMEM;
+				param.type = fs_value_is_string;
 			}
 			param.size = v_len;
 
diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index 6f8b67e61771..6171d28331e6 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -1488,7 +1488,7 @@ enum {
 	Opt_gid,
 };
 
-static const struct fs_parameter_spec ffs_fs_param_specs[] = {
+static const struct fs_parameter_spec ffs_fs_fs_parameters[] = {
 	fsparam_bool	("no_disconnect",	Opt_no_disconnect),
 	fsparam_u32	("rmode",		Opt_rmode),
 	fsparam_u32	("fmode",		Opt_fmode),
@@ -1498,11 +1498,6 @@ static const struct fs_parameter_spec ffs_fs_param_specs[] = {
 	{}
 };
 
-static const struct fs_parameter_description ffs_fs_fs_parameters = {
-	.name		= "kAFS",
-	.specs		= ffs_fs_param_specs,
-};
-
 static int ffs_fs_parse_param(struct fs_context *fc, struct fs_parameter *param)
 {
 	struct ffs_sb_fill_data *data = fc->fs_private;
@@ -1511,7 +1506,7 @@ static int ffs_fs_parse_param(struct fs_context *fc, struct fs_parameter *param)
 
 	ENTER();
 
-	opt = fs_parse(fc, &ffs_fs_fs_parameters, param, &result);
+	opt = fs_parse(fc, ffs_fs_fs_parameters, param, &result);
 	if (opt < 0)
 		return opt;
 
@@ -1643,7 +1638,7 @@ static struct file_system_type ffs_fs_type = {
 	.owner		= THIS_MODULE,
 	.name		= "functionfs",
 	.init_fs_context = ffs_fs_init_fs_context,
-	.parameters	= &ffs_fs_fs_parameters,
+	.parameters	= ffs_fs_fs_parameters,
 	.kill_sb	= ffs_fs_kill_sb,
 };
 MODULE_ALIAS_FS("functionfs");
diff --git a/fs/afs/super.c b/fs/afs/super.c
index 7f8a9b3137bf..dda7a9a66848 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -38,13 +38,13 @@ static int afs_statfs(struct dentry *dentry, struct kstatfs *buf);
 static int afs_show_devname(struct seq_file *m, struct dentry *root);
 static int afs_show_options(struct seq_file *m, struct dentry *root);
 static int afs_init_fs_context(struct fs_context *fc);
-static const struct fs_parameter_description afs_fs_parameters;
+static const struct fs_parameter_spec afs_fs_parameters[];
 
 struct file_system_type afs_fs_type = {
 	.owner			= THIS_MODULE,
 	.name			= "afs",
 	.init_fs_context	= afs_init_fs_context,
-	.parameters		= &afs_fs_parameters,
+	.parameters		= afs_fs_parameters,
 	.kill_sb		= afs_kill_super,
 	.fs_flags		= FS_RENAME_DOES_D_MOVE,
 };
@@ -73,28 +73,22 @@ enum afs_param {
 	Opt_source,
 };
 
-static const struct fs_parameter_spec afs_param_specs[] = {
-	fsparam_flag  ("autocell",	Opt_autocell),
-	fsparam_flag  ("dyn",		Opt_dyn),
-	fsparam_enum  ("flock",		Opt_flock),
-	fsparam_string("source",	Opt_source),
+static const struct constant_table afs_param_flock[] = {
+	{"local",	afs_flock_mode_local },
+	{"openafs",	afs_flock_mode_openafs },
+	{"strict",	afs_flock_mode_strict },
+	{"write",	afs_flock_mode_write },
 	{}
 };
 
-static const struct fs_parameter_enum afs_param_enums[] = {
-	{ Opt_flock,	"local",	afs_flock_mode_local },
-	{ Opt_flock,	"openafs",	afs_flock_mode_openafs },
-	{ Opt_flock,	"strict",	afs_flock_mode_strict },
-	{ Opt_flock,	"write",	afs_flock_mode_write },
+static const struct fs_parameter_spec afs_fs_parameters[] = {
+	fsparam_flag  ("autocell",	Opt_autocell),
+	fsparam_flag  ("dyn",		Opt_dyn),
+	fsparam_enum  ("flock",		Opt_flock, afs_param_flock),
+	fsparam_string("source",	Opt_source),
 	{}
 };
 
-static const struct fs_parameter_description afs_fs_parameters = {
-	.name		= "kAFS",
-	.specs		= afs_param_specs,
-	.enums		= afs_param_enums,
-};
-
 /*
  * initialise the filesystem
  */
@@ -323,7 +317,7 @@ static int afs_parse_param(struct fs_context *fc, struct fs_parameter *param)
 	struct afs_fs_context *ctx = fc->fs_private;
 	int opt;
 
-	opt = fs_parse(fc, &afs_fs_parameters, param, &result);
+	opt = fs_parse(fc, afs_fs_parameters, param, &result);
 	if (opt < 0)
 		return opt;
 
diff --git a/fs/ceph/cache.c b/fs/ceph/cache.c
index 73f24f307a4a..270b769607a2 100644
--- a/fs/ceph/cache.c
+++ b/fs/ceph/cache.c
@@ -67,7 +67,7 @@ int ceph_fscache_register_fs(struct ceph_fs_client* fsc, struct fs_context *fc)
 		if (uniq_len && memcmp(ent->uniquifier, fscache_uniq, uniq_len))
 			continue;
 
-		errorf(fc, "ceph: fscache cookie already registered for fsid %pU, use fsc=<uniquifier> option",
+		errorfc(fc, "fscache cookie already registered for fsid %pU, use fsc=<uniquifier> option",
 		       fsid);
 		err = -EBUSY;
 		goto out_unlock;
@@ -96,7 +96,7 @@ int ceph_fscache_register_fs(struct ceph_fs_client* fsc, struct fs_context *fc)
 		list_add_tail(&ent->list, &ceph_fscache_list);
 	} else {
 		kfree(ent);
-		errorf(fc, "ceph: unable to register fscache cookie for fsid %pU",
+		errorfc(fc, "unable to register fscache cookie for fsid %pU",
 		       fsid);
 		/* all other fs ignore this error */
 	}
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index bfb8aead0555..1d9f083b8a11 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -162,13 +162,13 @@ enum ceph_recover_session_mode {
 	ceph_recover_session_clean
 };
 
-static const struct fs_parameter_enum ceph_mount_param_enums[] = {
-	{ Opt_recover_session,	"no",		ceph_recover_session_no },
-	{ Opt_recover_session,	"clean",	ceph_recover_session_clean },
+static const struct constant_table ceph_param_recover[] = {
+	{ "no",		ceph_recover_session_no },
+	{ "clean",	ceph_recover_session_clean },
 	{}
 };
 
-static const struct fs_parameter_spec ceph_mount_param_specs[] = {
+static const struct fs_parameter_spec ceph_mount_parameters[] = {
 	fsparam_flag_no ("acl",				Opt_acl),
 	fsparam_flag_no ("asyncreaddir",		Opt_asyncreaddir),
 	fsparam_s32	("caps_max",			Opt_caps_max),
@@ -178,8 +178,8 @@ static const struct fs_parameter_spec ceph_mount_param_specs[] = {
 	fsparam_flag_no ("copyfrom",			Opt_copyfrom),
 	fsparam_flag_no ("dcache",			Opt_dcache),
 	fsparam_flag_no ("dirstat",			Opt_dirstat),
-	__fsparam	(fs_param_is_string, "fsc",	Opt_fscache,
-			 fs_param_neg_with_no | fs_param_v_optional),
+	fsparam_flag_no	("fsc",				Opt_fscache), // fsc|nofsc
+	fsparam_string	("fsc",				Opt_fscache), // fsc=...
 	fsparam_flag_no ("ino32",			Opt_ino32),
 	fsparam_string	("mds_namespace",		Opt_mds_namespace),
 	fsparam_flag_no ("poolperm",			Opt_poolperm),
@@ -188,7 +188,7 @@ static const struct fs_parameter_spec ceph_mount_param_specs[] = {
 	fsparam_flag_no ("rbytes",			Opt_rbytes),
 	fsparam_u32	("readdir_max_bytes",		Opt_readdir_max_bytes),
 	fsparam_u32	("readdir_max_entries",		Opt_readdir_max_entries),
-	fsparam_enum	("recover_session",		Opt_recover_session),
+	fsparam_enum	("recover_session",		Opt_recover_session, ceph_param_recover),
 	fsparam_flag_no ("require_active_mds",		Opt_require_active_mds),
 	fsparam_u32	("rsize",			Opt_rsize),
 	fsparam_string	("snapdirname",			Opt_snapdirname),
@@ -197,12 +197,6 @@ static const struct fs_parameter_spec ceph_mount_param_specs[] = {
 	{}
 };
 
-static const struct fs_parameter_description ceph_mount_parameters = {
-	.name           = "ceph",
-	.specs          = ceph_mount_param_specs,
-	.enums		= ceph_mount_param_enums,
-};
-
 struct ceph_parse_opts_ctx {
 	struct ceph_options		*copts;
 	struct ceph_mount_options	*opts;
@@ -226,7 +220,7 @@ static int ceph_parse_source(struct fs_parameter *param, struct fs_context *fc)
 
 	dout("%s '%s'\n", __func__, dev_name);
 	if (!dev_name || !*dev_name)
-		return invalf(fc, "ceph: Empty source");
+		return invalfc(fc, "Empty source");
 
 	dev_name_end = strchr(dev_name, '/');
 	if (dev_name_end) {
@@ -245,14 +239,14 @@ static int ceph_parse_source(struct fs_parameter *param, struct fs_context *fc)
 
 	dev_name_end--;		/* back up to ':' separator */
 	if (dev_name_end < dev_name || *dev_name_end != ':')
-		return invalf(fc, "ceph: No path or : separator in source");
+		return invalfc(fc, "No path or : separator in source");
 
 	dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name);
 	if (fsopt->server_path)
 		dout("server path '%s'\n", fsopt->server_path);
 
 	ret = ceph_parse_mon_ips(param->string, dev_name_end - dev_name,
-				 pctx->copts, fc);
+				 pctx->copts, fc->log.log);
 	if (ret)
 		return ret;
 
@@ -270,11 +264,11 @@ static int ceph_parse_mount_param(struct fs_context *fc,
 	unsigned int mode;
 	int token, ret;
 
-	ret = ceph_parse_param(param, pctx->copts, fc);
+	ret = ceph_parse_param(param, pctx->copts, fc->log.log);
 	if (ret != -ENOPARAM)
 		return ret;
 
-	token = fs_parse(fc, &ceph_mount_parameters, param, &result);
+	token = fs_parse(fc, ceph_mount_parameters, param, &result);
 	dout("%s fs_parse '%s' token %d\n", __func__, param->key, token);
 	if (token < 0)
 		return token;
@@ -301,7 +295,7 @@ static int ceph_parse_mount_param(struct fs_context *fc,
 		break;
 	case Opt_source:
 		if (fc->source)
-			return invalf(fc, "ceph: Multiple sources specified");
+			return invalfc(fc, "Multiple sources specified");
 		return ceph_parse_source(param, fc);
 	case Opt_wsize:
 		if (result.uint_32 < PAGE_SIZE ||
@@ -392,7 +386,7 @@ static int ceph_parse_mount_param(struct fs_context *fc,
 		}
 		break;
 #else
-		return invalf(fc, "ceph: fscache support is disabled");
+		return invalfc(fc, "fscache support is disabled");
 #endif
 	case Opt_poolperm:
 		if (!result.negated)
@@ -423,7 +417,7 @@ static int ceph_parse_mount_param(struct fs_context *fc,
 #ifdef CONFIG_CEPH_FS_POSIX_ACL
 			fc->sb_flags |= SB_POSIXACL;
 #else
-			return invalf(fc, "ceph: POSIX ACL support is disabled");
+			return invalfc(fc, "POSIX ACL support is disabled");
 #endif
 		} else {
 			fc->sb_flags &= ~SB_POSIXACL;
@@ -435,7 +429,7 @@ static int ceph_parse_mount_param(struct fs_context *fc,
 	return 0;
 
 out_of_range:
-	return invalf(fc, "ceph: %s out of range", param->key);
+	return invalfc(fc, "%s out of range", param->key);
 }
 
 static void destroy_mount_options(struct ceph_mount_options *args)
@@ -1101,7 +1095,7 @@ static int ceph_get_tree(struct fs_context *fc)
 	dout("ceph_get_tree\n");
 
 	if (!fc->source)
-		return invalf(fc, "ceph: No source");
+		return invalfc(fc, "No source");
 
 #ifdef CONFIG_CEPH_FS_POSIX_ACL
 	fc->sb_flags |= SB_POSIXACL;
diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index 2f04024c3588..912308600d39 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -534,7 +534,7 @@ static int cramfs_read_super(struct super_block *sb, struct fs_context *fc,
 		/* check for wrong endianness */
 		if (super->magic == CRAMFS_MAGIC_WEND) {
 			if (!silent)
-				errorf(fc, "cramfs: wrong endianness");
+				errorfc(fc, "wrong endianness");
 			return -EINVAL;
 		}
 
@@ -546,22 +546,22 @@ static int cramfs_read_super(struct super_block *sb, struct fs_context *fc,
 		mutex_unlock(&read_mutex);
 		if (super->magic != CRAMFS_MAGIC) {
 			if (super->magic == CRAMFS_MAGIC_WEND && !silent)
-				errorf(fc, "cramfs: wrong endianness");
+				errorfc(fc, "wrong endianness");
 			else if (!silent)
-				errorf(fc, "cramfs: wrong magic");
+				errorfc(fc, "wrong magic");
 			return -EINVAL;
 		}
 	}
 
 	/* get feature flags first */
 	if (super->flags & ~CRAMFS_SUPPORTED_FLAGS) {
-		errorf(fc, "cramfs: unsupported filesystem features");
+		errorfc(fc, "unsupported filesystem features");
 		return -EINVAL;
 	}
 
 	/* Check that the root inode is in a sane state */
 	if (!S_ISDIR(super->root.mode)) {
-		errorf(fc, "cramfs: root is not a directory");
+		errorfc(fc, "root is not a directory");
 		return -EINVAL;
 	}
 	/* correct strange, hard-coded permissions of mkcramfs */
@@ -580,12 +580,12 @@ static int cramfs_read_super(struct super_block *sb, struct fs_context *fc,
 	sbi->magic = super->magic;
 	sbi->flags = super->flags;
 	if (root_offset == 0)
-		infof(fc, "cramfs: empty filesystem");
+		infofc(fc, "empty filesystem");
 	else if (!(super->flags & CRAMFS_FLAG_SHIFTED_ROOT_OFFSET) &&
 		 ((root_offset != sizeof(struct cramfs_super)) &&
 		  (root_offset != 512 + sizeof(struct cramfs_super))))
 	{
-		errorf(fc, "cramfs: bad root offset %lu", root_offset);
+		errorfc(fc, "bad root offset %lu", root_offset);
 		return -EINVAL;
 	}
 
diff --git a/fs/filesystems.c b/fs/filesystems.c
index 9135646e41ac..77bf5f95362d 100644
--- a/fs/filesystems.c
+++ b/fs/filesystems.c
@@ -74,7 +74,8 @@ int register_filesystem(struct file_system_type * fs)
 	int res = 0;
 	struct file_system_type ** p;
 
-	if (fs->parameters && !fs_validate_description(fs->parameters))
+	if (fs->parameters &&
+	    !fs_validate_description(fs->name, fs->parameters))
 		return -EINVAL;
 
 	BUG_ON(strchr(fs->name, '.'));
diff --git a/fs/fs_context.c b/fs/fs_context.c
index 138b5b4d621d..fc9f6ef93b55 100644
--- a/fs/fs_context.c
+++ b/fs/fs_context.c
@@ -45,6 +45,7 @@ static const struct constant_table common_set_sb_flag[] = {
 	{ "posixacl",	SB_POSIXACL },
 	{ "ro",		SB_RDONLY },
 	{ "sync",	SB_SYNCHRONOUS },
+	{ },
 };
 
 static const struct constant_table common_clear_sb_flag[] = {
@@ -53,6 +54,7 @@ static const struct constant_table common_clear_sb_flag[] = {
 	{ "nomand",	SB_MANDLOCK },
 	{ "rw",		SB_RDONLY },
 	{ "silent",	SB_SILENT },
+	{ },
 };
 
 static const char *const forbidden_sb_flag[] = {
@@ -175,14 +177,15 @@ int vfs_parse_fs_string(struct fs_context *fc, const char *key,
 
 	struct fs_parameter param = {
 		.key	= key,
-		.type	= fs_value_is_string,
+		.type	= fs_value_is_flag,
 		.size	= v_size,
 	};
 
-	if (v_size > 0) {
+	if (value) {
 		param.string = kmemdup_nul(value, v_size, GFP_KERNEL);
 		if (!param.string)
 			return -ENOMEM;
+		param.type = fs_value_is_string;
 	}
 
 	ret = vfs_parse_fs_param(fc, &param);
@@ -268,6 +271,7 @@ static struct fs_context *alloc_fs_context(struct file_system_type *fs_type,
 	fc->fs_type	= get_filesystem(fs_type);
 	fc->cred	= get_current_cred();
 	fc->net_ns	= get_net(current->nsproxy->net_ns);
+	fc->log.prefix	= fs_type->name;
 
 	mutex_init(&fc->uapi_mutex);
 
@@ -361,8 +365,8 @@ struct fs_context *vfs_dup_fs_context(struct fs_context *src_fc)
 	get_net(fc->net_ns);
 	get_user_ns(fc->user_ns);
 	get_cred(fc->cred);
-	if (fc->log)
-		refcount_inc(&fc->log->usage);
+	if (fc->log.log)
+		refcount_inc(&fc->log.log->usage);
 
 	/* Can't call put until we've called ->dup */
 	ret = fc->ops->dup(fc, src_fc);
@@ -385,64 +389,33 @@ EXPORT_SYMBOL(vfs_dup_fs_context);
  * @fc: The filesystem context to log to.
  * @fmt: The format of the buffer.
  */
-void logfc(struct fs_context *fc, const char *fmt, ...)
+void logfc(struct fc_log *log, const char *prefix, char level, const char *fmt, ...)
 {
-	static const char store_failure[] = "OOM: Can't store error string";
-	struct fc_log *log = fc ? fc->log : NULL;
-	const char *p;
 	va_list va;
-	char *q;
-	u8 freeable;
+	struct va_format vaf = {.fmt = fmt, .va = &va};
 
 	va_start(va, fmt);
-	if (!strchr(fmt, '%')) {
-		p = fmt;
-		goto unformatted_string;
-	}
-	if (strcmp(fmt, "%s") == 0) {
-		p = va_arg(va, const char *);
-		goto unformatted_string;
-	}
-
-	q = kvasprintf(GFP_KERNEL, fmt, va);
-copied_string:
-	if (!q)
-		goto store_failure;
-	freeable = 1;
-	goto store_string;
-
-unformatted_string:
-	if ((unsigned long)p >= (unsigned long)__start_rodata &&
-	    (unsigned long)p <  (unsigned long)__end_rodata)
-		goto const_string;
-	if (log && within_module_core((unsigned long)p, log->owner))
-		goto const_string;
-	q = kstrdup(p, GFP_KERNEL);
-	goto copied_string;
-
-store_failure:
-	p = store_failure;
-const_string:
-	q = (char *)p;
-	freeable = 0;
-store_string:
 	if (!log) {
-		switch (fmt[0]) {
+		switch (level) {
 		case 'w':
-			printk(KERN_WARNING "%s\n", q + 2);
+			printk(KERN_WARNING "%s%s%pV\n", prefix ? prefix : "",
+						prefix ? ": " : "", &vaf);
 			break;
 		case 'e':
-			printk(KERN_ERR "%s\n", q + 2);
+			printk(KERN_ERR "%s%s%pV\n", prefix ? prefix : "",
+						prefix ? ": " : "", &vaf);
 			break;
 		default:
-			printk(KERN_NOTICE "%s\n", q + 2);
+			printk(KERN_NOTICE "%s%s%pV\n", prefix ? prefix : "",
+						prefix ? ": " : "", &vaf);
 			break;
 		}
-		if (freeable)
-			kfree(q);
 	} else {
 		unsigned int logsize = ARRAY_SIZE(log->buffer);
 		u8 index;
+		char *q = kasprintf(GFP_KERNEL, "%c %s%s%pV\n", level,
+						prefix ? prefix : "",
+						prefix ? ": " : "", &vaf);
 
 		index = log->head & (logsize - 1);
 		BUILD_BUG_ON(sizeof(log->head) != sizeof(u8) ||
@@ -454,9 +427,11 @@ store_string:
 			log->tail++;
 		}
 
-		log->buffer[index] = q;
-		log->need_free &= ~(1 << index);
-		log->need_free |= freeable << index;
+		log->buffer[index] = q ? q : "OOM: Can't store error string";
+		if (q)
+			log->need_free |= 1 << index;
+		else
+			log->need_free &= ~(1 << index);
 		log->head++;
 	}
 	va_end(va);
@@ -468,12 +443,12 @@ EXPORT_SYMBOL(logfc);
  */
 static void put_fc_log(struct fs_context *fc)
 {
-	struct fc_log *log = fc->log;
+	struct fc_log *log = fc->log.log;
 	int i;
 
 	if (log) {
 		if (refcount_dec_and_test(&log->usage)) {
-			fc->log = NULL;
+			fc->log.log = NULL;
 			for (i = 0; i <= 7; i++)
 				if (log->need_free & (1 << i))
 					kfree(log->buffer[i]);
diff --git a/fs/fs_parser.c b/fs/fs_parser.c
index d1930adce68d..7e6fb43f9541 100644
--- a/fs/fs_parser.c
+++ b/fs/fs_parser.c
@@ -20,42 +20,66 @@ static const struct constant_table bool_names[] = {
 	{ "no",		false },
 	{ "true",	true },
 	{ "yes",	true },
+	{ },
 };
 
+static const struct constant_table *
+__lookup_constant(const struct constant_table *tbl, const char *name)
+{
+	for ( ; tbl->name; tbl++)
+		if (strcmp(name, tbl->name) == 0)
+			return tbl;
+	return NULL;
+}
+
 /**
  * lookup_constant - Look up a constant by name in an ordered table
  * @tbl: The table of constants to search.
- * @tbl_size: The size of the table.
  * @name: The name to look up.
  * @not_found: The value to return if the name is not found.
  */
-int __lookup_constant(const struct constant_table *tbl, size_t tbl_size,
-		      const char *name, int not_found)
+int lookup_constant(const struct constant_table *tbl, const char *name, int not_found)
 {
-	unsigned int i;
+	const struct constant_table *p = __lookup_constant(tbl, name);
 
-	for (i = 0; i < tbl_size; i++)
-		if (strcmp(name, tbl[i].name) == 0)
-			return tbl[i].value;
+	return p ? p->value : not_found;
+}
+EXPORT_SYMBOL(lookup_constant);
 
-	return not_found;
+static inline bool is_flag(const struct fs_parameter_spec *p)
+{
+	return p->type == NULL;
 }
-EXPORT_SYMBOL(__lookup_constant);
 
 static const struct fs_parameter_spec *fs_lookup_key(
-	const struct fs_parameter_description *desc,
-	const char *name)
+	const struct fs_parameter_spec *desc,
+	struct fs_parameter *param, bool *negated)
 {
-	const struct fs_parameter_spec *p;
-
-	if (!desc->specs)
-		return NULL;
-
-	for (p = desc->specs; p->name; p++)
-		if (strcmp(p->name, name) == 0)
+	const struct fs_parameter_spec *p, *other = NULL;
+	const char *name = param->key;
+	bool want_flag = param->type == fs_value_is_flag;
+
+	*negated = false;
+	for (p = desc; p->name; p++) {
+		if (strcmp(p->name, name) != 0)
+			continue;
+		if (likely(is_flag(p) == want_flag))
 			return p;
-
-	return NULL;
+		other = p;
+	}
+	if (want_flag) {
+		if (name[0] == 'n' && name[1] == 'o' && name[2]) {
+			for (p = desc; p->name; p++) {
+				if (strcmp(p->name, name + 2) != 0)
+					continue;
+				if (!(p->flags & fs_param_neg_with_no))
+					continue;
+				*negated = true;
+				return p;
+			}
+		}
+	}
+	return other;
 }
 
 /*
@@ -76,172 +100,38 @@ static const struct fs_parameter_spec *fs_lookup_key(
  * unknown parameters are okay and -EINVAL if there was a conversion issue or
  * the parameter wasn't recognised and unknowns aren't okay.
  */
-int fs_parse(struct fs_context *fc,
-	     const struct fs_parameter_description *desc,
+int __fs_parse(struct p_log *log,
+	     const struct fs_parameter_spec *desc,
 	     struct fs_parameter *param,
 	     struct fs_parse_result *result)
 {
 	const struct fs_parameter_spec *p;
-	const struct fs_parameter_enum *e;
-	int ret = -ENOPARAM, b;
 
-	result->has_value = !!param->string;
-	result->negated = false;
 	result->uint_64 = 0;
 
-	p = fs_lookup_key(desc, param->key);
-	if (!p) {
-		/* If we didn't find something that looks like "noxxx", see if
-		 * "xxx" takes the "no"-form negative - but only if there
-		 * wasn't an value.
-		 */
-		if (result->has_value)
-			goto unknown_parameter;
-		if (param->key[0] != 'n' || param->key[1] != 'o' || !param->key[2])
-			goto unknown_parameter;
-
-		p = fs_lookup_key(desc, param->key + 2);
-		if (!p)
-			goto unknown_parameter;
-		if (!(p->flags & fs_param_neg_with_no))
-			goto unknown_parameter;
-		result->boolean = false;
-		result->negated = true;
-	}
+	p = fs_lookup_key(desc, param, &result->negated);
+	if (!p)
+		return -ENOPARAM;
 
 	if (p->flags & fs_param_deprecated)
-		warnf(fc, "%s: Deprecated parameter '%s'",
-		      desc->name, param->key);
-
-	if (result->negated)
-		goto okay;
-
-	/* Certain parameter types only take a string and convert it. */
-	switch (p->type) {
-	case __fs_param_wasnt_defined:
-		return -EINVAL;
-	case fs_param_is_u32:
-	case fs_param_is_u32_octal:
-	case fs_param_is_u32_hex:
-	case fs_param_is_s32:
-	case fs_param_is_u64:
-	case fs_param_is_enum:
-	case fs_param_is_string:
-		if (param->type != fs_value_is_string)
-			goto bad_value;
-		if (!result->has_value) {
-			if (p->flags & fs_param_v_optional)
-				goto okay;
-			goto bad_value;
-		}
-		/* Fall through */
-	default:
-		break;
-	}
+		warn_plog(log, "Deprecated parameter '%s'", param->key);
 
 	/* Try to turn the type we were given into the type desired by the
 	 * parameter and give an error if we can't.
 	 */
-	switch (p->type) {
-	case fs_param_is_flag:
-		if (param->type != fs_value_is_flag &&
-		    (param->type != fs_value_is_string || result->has_value))
-			return invalf(fc, "%s: Unexpected value for '%s'",
-				      desc->name, param->key);
-		result->boolean = true;
-		goto okay;
-
-	case fs_param_is_bool:
-		switch (param->type) {
-		case fs_value_is_flag:
-			result->boolean = true;
-			goto okay;
-		case fs_value_is_string:
-			if (param->size == 0) {
-				result->boolean = true;
-				goto okay;
-			}
-			b = lookup_constant(bool_names, param->string, -1);
-			if (b == -1)
-				goto bad_value;
-			result->boolean = b;
-			goto okay;
-		default:
-			goto bad_value;
-		}
-
-	case fs_param_is_u32:
-		ret = kstrtouint(param->string, 0, &result->uint_32);
-		goto maybe_okay;
-	case fs_param_is_u32_octal:
-		ret = kstrtouint(param->string, 8, &result->uint_32);
-		goto maybe_okay;
-	case fs_param_is_u32_hex:
-		ret = kstrtouint(param->string, 16, &result->uint_32);
-		goto maybe_okay;
-	case fs_param_is_s32:
-		ret = kstrtoint(param->string, 0, &result->int_32);
-		goto maybe_okay;
-	case fs_param_is_u64:
-		ret = kstrtoull(param->string, 0, &result->uint_64);
-		goto maybe_okay;
-
-	case fs_param_is_enum:
-		for (e = desc->enums; e->name[0]; e++) {
-			if (e->opt == p->opt &&
-			    strcmp(e->name, param->string) == 0) {
-				result->uint_32 = e->value;
-				goto okay;
-			}
-		}
-		goto bad_value;
-
-	case fs_param_is_string:
-		goto okay;
-	case fs_param_is_blob:
-		if (param->type != fs_value_is_blob)
-			goto bad_value;
-		goto okay;
-
-	case fs_param_is_fd: {
-		switch (param->type) {
-		case fs_value_is_string:
-			if (!result->has_value)
-				goto bad_value;
-
-			ret = kstrtouint(param->string, 0, &result->uint_32);
-			break;
-		case fs_value_is_file:
-			result->uint_32 = param->dirfd;
-			ret = 0;
-		default:
-			goto bad_value;
-		}
-
-		if (result->uint_32 > INT_MAX)
-			goto bad_value;
-		goto maybe_okay;
-	}
-
-	case fs_param_is_blockdev:
-	case fs_param_is_path:
-		goto okay;
-	default:
-		BUG();
+	if (is_flag(p)) {
+		if (param->type != fs_value_is_flag)
+			return inval_plog(log, "Unexpected value for '%s'",
+				      param->key);
+		result->boolean = !result->negated;
+	} else  {
+		int ret = p->type(log, p, param, result);
+		if (ret)
+			return ret;
 	}
-
-maybe_okay:
-	if (ret < 0)
-		goto bad_value;
-okay:
 	return p->opt;
-
-bad_value:
-	return invalf(fc, "%s: Bad value for '%s'", desc->name, param->key);
-unknown_parameter:
-	return -ENOPARAM;
 }
-EXPORT_SYMBOL(fs_parse);
+EXPORT_SYMBOL(__fs_parse);
 
 /**
  * fs_lookup_param - Look up a path referred to by a parameter
@@ -267,9 +157,6 @@ int fs_lookup_param(struct fs_context *fc,
 			return PTR_ERR(f);
 		put_f = true;
 		break;
-	case fs_value_is_filename_empty:
-		flags = LOOKUP_EMPTY;
-		/* Fall through */
 	case fs_value_is_filename:
 		f = param->name;
 		put_f = false;
@@ -302,6 +189,124 @@ out:
 }
 EXPORT_SYMBOL(fs_lookup_param);
 
+int fs_param_bad_value(struct p_log *log, struct fs_parameter *param)
+{
+	return inval_plog(log, "Bad value for '%s'", param->key);
+}
+
+int fs_param_is_bool(struct p_log *log, const struct fs_parameter_spec *p,
+		     struct fs_parameter *param, struct fs_parse_result *result)
+{
+	int b;
+	if (param->type != fs_value_is_string)
+		return fs_param_bad_value(log, param);
+	b = lookup_constant(bool_names, param->string, -1);
+	if (b == -1)
+		return fs_param_bad_value(log, param);
+	result->boolean = b;
+	return 0;
+}
+EXPORT_SYMBOL(fs_param_is_bool);
+
+int fs_param_is_u32(struct p_log *log, const struct fs_parameter_spec *p,
+		    struct fs_parameter *param, struct fs_parse_result *result)
+{
+	int base = (unsigned long)p->data;
+	if (param->type != fs_value_is_string ||
+	    kstrtouint(param->string, base, &result->uint_32) < 0)
+		return fs_param_bad_value(log, param);
+	return 0;
+}
+EXPORT_SYMBOL(fs_param_is_u32);
+
+int fs_param_is_s32(struct p_log *log, const struct fs_parameter_spec *p,
+		    struct fs_parameter *param, struct fs_parse_result *result)
+{
+	if (param->type != fs_value_is_string ||
+	    kstrtoint(param->string, 0, &result->int_32) < 0)
+		return fs_param_bad_value(log, param);
+	return 0;
+}
+EXPORT_SYMBOL(fs_param_is_s32);
+
+int fs_param_is_u64(struct p_log *log, const struct fs_parameter_spec *p,
+		    struct fs_parameter *param, struct fs_parse_result *result)
+{
+	if (param->type != fs_value_is_string ||
+	    kstrtoull(param->string, 0, &result->uint_64) < 0)
+		return fs_param_bad_value(log, param);
+	return 0;
+}
+EXPORT_SYMBOL(fs_param_is_u64);
+
+int fs_param_is_enum(struct p_log *log, const struct fs_parameter_spec *p,
+		     struct fs_parameter *param, struct fs_parse_result *result)
+{
+	const struct constant_table *c;
+	if (param->type != fs_value_is_string)
+		return fs_param_bad_value(log, param);
+	c = __lookup_constant(p->data, param->string);
+	if (!c)
+		return fs_param_bad_value(log, param);
+	result->uint_32 = c->value;
+	return 0;
+}
+EXPORT_SYMBOL(fs_param_is_enum);
+
+int fs_param_is_string(struct p_log *log, const struct fs_parameter_spec *p,
+		       struct fs_parameter *param, struct fs_parse_result *result)
+{
+	if (param->type != fs_value_is_string || !*param->string)
+		return fs_param_bad_value(log, param);
+	return 0;
+}
+EXPORT_SYMBOL(fs_param_is_string);
+
+int fs_param_is_blob(struct p_log *log, const struct fs_parameter_spec *p,
+		     struct fs_parameter *param, struct fs_parse_result *result)
+{
+	if (param->type != fs_value_is_blob)
+		return fs_param_bad_value(log, param);
+	return 0;
+}
+EXPORT_SYMBOL(fs_param_is_blob);
+
+int fs_param_is_fd(struct p_log *log, const struct fs_parameter_spec *p,
+		  struct fs_parameter *param, struct fs_parse_result *result)
+{
+	switch (param->type) {
+	case fs_value_is_string:
+		if (kstrtouint(param->string, 0, &result->uint_32) < 0)
+			break;
+		if (result->uint_32 <= INT_MAX)
+			return 0;
+		break;
+	case fs_value_is_file:
+		result->uint_32 = param->dirfd;
+		if (result->uint_32 <= INT_MAX)
+			return 0;
+		break;
+	default:
+		break;
+	}
+	return fs_param_bad_value(log, param);
+}
+EXPORT_SYMBOL(fs_param_is_fd);
+
+int fs_param_is_blockdev(struct p_log *log, const struct fs_parameter_spec *p,
+		  struct fs_parameter *param, struct fs_parse_result *result)
+{
+	return 0;
+}
+EXPORT_SYMBOL(fs_param_is_blockdev);
+
+int fs_param_is_path(struct p_log *log, const struct fs_parameter_spec *p,
+		     struct fs_parameter *param, struct fs_parse_result *result)
+{
+	return 0;
+}
+EXPORT_SYMBOL(fs_param_is_path);
+
 #ifdef CONFIG_VALIDATE_FS_PARSER
 /**
  * validate_constant_table - Validate a constant table
@@ -357,102 +362,26 @@ bool validate_constant_table(const struct constant_table *tbl, size_t tbl_size,
  * fs_validate_description - Validate a parameter description
  * @desc: The parameter description to validate.
  */
-bool fs_validate_description(const struct fs_parameter_description *desc)
+bool fs_validate_description(const char *name,
+	const struct fs_parameter_spec *desc)
 {
 	const struct fs_parameter_spec *param, *p2;
-	const struct fs_parameter_enum *e;
-	const char *name = desc->name;
-	unsigned int nr_params = 0;
-	bool good = true, enums = false;
+	bool good = true;
 
 	pr_notice("*** VALIDATE %s ***\n", name);
 
-	if (!name[0]) {
-		pr_err("VALIDATE Parser: No name\n");
-		name = "Unknown";
-		good = false;
-	}
-
-	if (desc->specs) {
-		for (param = desc->specs; param->name; param++) {
-			enum fs_parameter_type t = param->type;
-
-			/* Check that the type is in range */
-			if (t == __fs_param_wasnt_defined ||
-			    t >= nr__fs_parameter_type) {
-				pr_err("VALIDATE %s: PARAM[%s] Bad type %u\n",
-				       name, param->name, t);
-				good = false;
-			} else if (t == fs_param_is_enum) {
-				enums = true;
-			}
-
-			/* Check for duplicate parameter names */
-			for (p2 = desc->specs; p2 < param; p2++) {
-				if (strcmp(param->name, p2->name) == 0) {
-					pr_err("VALIDATE %s: PARAM[%s]: Duplicate\n",
-					       name, param->name);
-					good = false;
-				}
-			}
-		}
-
-		nr_params = param - desc->specs;
-	}
-
-	if (desc->enums) {
-		if (!nr_params) {
-			pr_err("VALIDATE %s: Enum table but no parameters\n",
-			       name);
-			good = false;
-			goto no_enums;
-		}
-		if (!enums) {
-			pr_err("VALIDATE %s: Enum table but no enum-type values\n",
-			       name);
-			good = false;
-			goto no_enums;
-		}
-
-		for (e = desc->enums; e->name[0]; e++) {
-			/* Check that all entries in the enum table have at
-			 * least one parameter that uses them.
-			 */
-			for (param = desc->specs; param->name; param++) {
-				if (param->opt == e->opt &&
-				    param->type != fs_param_is_enum) {
-					pr_err("VALIDATE %s: e[%tu] enum val for %s\n",
-					       name, e - desc->enums, param->name);
-					good = false;
-				}
-			}
-		}
-
-		/* Check that all enum-type parameters have at least one enum
-		 * value in the enum table.
-		 */
-		for (param = desc->specs; param->name; param++) {
-			if (param->type != fs_param_is_enum)
-				continue;
-			for (e = desc->enums; e->name[0]; e++)
-				if (e->opt == param->opt)
-					break;
-			if (!e->name[0]) {
-				pr_err("VALIDATE %s: PARAM[%s] enum with no values\n",
+	for (param = desc; param->name; param++) {
+		/* Check for duplicate parameter names */
+		for (p2 = desc; p2 < param; p2++) {
+			if (strcmp(param->name, p2->name) == 0) {
+				if (is_flag(param) != is_flag(p2))
+					continue;
+				pr_err("VALIDATE %s: PARAM[%s]: Duplicate\n",
 				       name, param->name);
 				good = false;
 			}
 		}
-	} else {
-		if (enums) {
-			pr_err("VALIDATE %s: enum-type values, but no enum table\n",
-			       name);
-			good = false;
-			goto no_enums;
-		}
 	}
-
-no_enums:
 	return good;
 }
 #endif /* CONFIG_VALIDATE_FS_PARSER */
diff --git a/fs/fsopen.c b/fs/fsopen.c
index 043ffa8dc263..2fa3f241b762 100644
--- a/fs/fsopen.c
+++ b/fs/fsopen.c
@@ -25,7 +25,7 @@ static ssize_t fscontext_read(struct file *file,
 			      char __user *_buf, size_t len, loff_t *pos)
 {
 	struct fs_context *fc = file->private_data;
-	struct fc_log *log = fc->log;
+	struct fc_log *log = fc->log.log;
 	unsigned int logsize = ARRAY_SIZE(log->buffer);
 	ssize_t ret;
 	char *p;
@@ -97,11 +97,11 @@ static int fscontext_create_fd(struct fs_context *fc, unsigned int o_flags)
 
 static int fscontext_alloc_log(struct fs_context *fc)
 {
-	fc->log = kzalloc(sizeof(*fc->log), GFP_KERNEL);
-	if (!fc->log)
+	fc->log.log = kzalloc(sizeof(*fc->log.log), GFP_KERNEL);
+	if (!fc->log.log)
 		return -ENOMEM;
-	refcount_set(&fc->log->usage, 1);
-	fc->log->owner = fc->fs_type->owner;
+	refcount_set(&fc->log.log->usage, 1);
+	fc->log.log->owner = fc->fs_type->owner;
 	return 0;
 }
 
@@ -321,6 +321,7 @@ SYSCALL_DEFINE5(fsconfig,
 	struct fs_context *fc;
 	struct fd f;
 	int ret;
+	int lookup_flags = 0;
 
 	struct fs_parameter param = {
 		.type	= fs_value_is_undefined,
@@ -409,19 +410,12 @@ SYSCALL_DEFINE5(fsconfig,
 			goto out_key;
 		}
 		break;
+	case FSCONFIG_SET_PATH_EMPTY:
+		lookup_flags = LOOKUP_EMPTY;
+		/* fallthru */
 	case FSCONFIG_SET_PATH:
 		param.type = fs_value_is_filename;
-		param.name = getname_flags(_value, 0, NULL);
-		if (IS_ERR(param.name)) {
-			ret = PTR_ERR(param.name);
-			goto out_key;
-		}
-		param.dirfd = aux;
-		param.size = strlen(param.name->name);
-		break;
-	case FSCONFIG_SET_PATH_EMPTY:
-		param.type = fs_value_is_filename_empty;
-		param.name = getname_flags(_value, LOOKUP_EMPTY, NULL);
+		param.name = getname_flags(_value, lookup_flags, NULL);
 		if (IS_ERR(param.name)) {
 			ret = PTR_ERR(param.name);
 			goto out_key;
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 77fef29ebe4f..95d712d44ca1 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -448,7 +448,7 @@ enum {
 	OPT_ERR
 };
 
-static const struct fs_parameter_spec fuse_param_specs[] = {
+static const struct fs_parameter_spec fuse_fs_parameters[] = {
 	fsparam_string	("source",		OPT_SOURCE),
 	fsparam_u32	("fd",			OPT_FD),
 	fsparam_u32oct	("rootmode",		OPT_ROOTMODE),
@@ -462,32 +462,27 @@ static const struct fs_parameter_spec fuse_param_specs[] = {
 	{}
 };
 
-static const struct fs_parameter_description fuse_fs_parameters = {
-	.name		= "fuse",
-	.specs		= fuse_param_specs,
-};
-
 static int fuse_parse_param(struct fs_context *fc, struct fs_parameter *param)
 {
 	struct fs_parse_result result;
 	struct fuse_fs_context *ctx = fc->fs_private;
 	int opt;
 
-	opt = fs_parse(fc, &fuse_fs_parameters, param, &result);
+	opt = fs_parse(fc, fuse_fs_parameters, param, &result);
 	if (opt < 0)
 		return opt;
 
 	switch (opt) {
 	case OPT_SOURCE:
 		if (fc->source)
-			return invalf(fc, "fuse: Multiple sources specified");
+			return invalfc(fc, "Multiple sources specified");
 		fc->source = param->string;
 		param->string = NULL;
 		break;
 
 	case OPT_SUBTYPE:
 		if (ctx->subtype)
-			return invalf(fc, "fuse: Multiple subtypes specified");
+			return invalfc(fc, "Multiple subtypes specified");
 		ctx->subtype = param->string;
 		param->string = NULL;
 		return 0;
@@ -499,7 +494,7 @@ static int fuse_parse_param(struct fs_context *fc, struct fs_parameter *param)
 
 	case OPT_ROOTMODE:
 		if (!fuse_valid_type(result.uint_32))
-			return invalf(fc, "fuse: Invalid rootmode");
+			return invalfc(fc, "Invalid rootmode");
 		ctx->rootmode = result.uint_32;
 		ctx->rootmode_present = true;
 		break;
@@ -507,14 +502,14 @@ static int fuse_parse_param(struct fs_context *fc, struct fs_parameter *param)
 	case OPT_USER_ID:
 		ctx->user_id = make_kuid(fc->user_ns, result.uint_32);
 		if (!uid_valid(ctx->user_id))
-			return invalf(fc, "fuse: Invalid user_id");
+			return invalfc(fc, "Invalid user_id");
 		ctx->user_id_present = true;
 		break;
 
 	case OPT_GROUP_ID:
 		ctx->group_id = make_kgid(fc->user_ns, result.uint_32);
 		if (!gid_valid(ctx->group_id))
-			return invalf(fc, "fuse: Invalid group_id");
+			return invalfc(fc, "Invalid group_id");
 		ctx->group_id_present = true;
 		break;
 
@@ -532,7 +527,7 @@ static int fuse_parse_param(struct fs_context *fc, struct fs_parameter *param)
 
 	case OPT_BLKSIZE:
 		if (!ctx->is_bdev)
-			return invalf(fc, "fuse: blksize only supported for fuseblk");
+			return invalfc(fc, "blksize only supported for fuseblk");
 		ctx->blksize = result.uint_32;
 		break;
 
@@ -1347,7 +1342,7 @@ static struct file_system_type fuse_fs_type = {
 	.name		= "fuse",
 	.fs_flags	= FS_HAS_SUBTYPE | FS_USERNS_MOUNT,
 	.init_fs_context = fuse_init_fs_context,
-	.parameters	= &fuse_fs_parameters,
+	.parameters	= fuse_fs_parameters,
 	.kill_sb	= fuse_kill_sb_anon,
 };
 MODULE_ALIAS_FS("fuse");
@@ -1363,7 +1358,7 @@ static struct file_system_type fuseblk_fs_type = {
 	.owner		= THIS_MODULE,
 	.name		= "fuseblk",
 	.init_fs_context = fuse_init_fs_context,
-	.parameters	= &fuse_fs_parameters,
+	.parameters	= fuse_fs_parameters,
 	.kill_sb	= fuse_kill_sb_blk,
 	.fs_flags	= FS_REQUIRES_DEV | FS_HAS_SUBTYPE,
 };
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index b3e904bcc02c..a1a8ef7ed3fd 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -1252,6 +1252,7 @@ enum gfs2_param {
 	Opt_upgrade,
 	Opt_acl,
 	Opt_quota,
+	Opt_quota_flag,
 	Opt_suiddir,
 	Opt_data,
 	Opt_meta,
@@ -1266,17 +1267,11 @@ enum gfs2_param {
 	Opt_loccookie,
 };
 
-enum opt_quota {
-	Opt_quota_unset = 0,
-	Opt_quota_off,
-	Opt_quota_account,
-	Opt_quota_on,
-};
-
-static const unsigned int opt_quota_values[] = {
-	[Opt_quota_off]     = GFS2_QUOTA_OFF,
-	[Opt_quota_account] = GFS2_QUOTA_ACCOUNT,
-	[Opt_quota_on]      = GFS2_QUOTA_ON,
+static const struct constant_table gfs2_param_quota[] = {
+	{"off",        GFS2_QUOTA_OFF},
+	{"account",    GFS2_QUOTA_ACCOUNT},
+	{"on",         GFS2_QUOTA_ON},
+	{}
 };
 
 enum opt_data {
@@ -1284,12 +1279,24 @@ enum opt_data {
 	Opt_data_ordered   = GFS2_DATA_ORDERED,
 };
 
+static const struct constant_table gfs2_param_data[] = {
+	{"writeback",  Opt_data_writeback },
+	{"ordered",    Opt_data_ordered },
+	{}
+};
+
 enum opt_errors {
 	Opt_errors_withdraw = GFS2_ERRORS_WITHDRAW,
 	Opt_errors_panic    = GFS2_ERRORS_PANIC,
 };
 
-static const struct fs_parameter_spec gfs2_param_specs[] = {
+static const struct constant_table gfs2_param_errors[] = {
+	{"withdraw",   Opt_errors_withdraw },
+	{"panic",      Opt_errors_panic },
+	{}
+};
+
+static const struct fs_parameter_spec gfs2_fs_parameters[] = {
 	fsparam_string ("lockproto",          Opt_lockproto),
 	fsparam_string ("locktable",          Opt_locktable),
 	fsparam_string ("hostdata",           Opt_hostdata),
@@ -1302,11 +1309,11 @@ static const struct fs_parameter_spec gfs2_param_specs[] = {
 	fsparam_flag   ("upgrade",            Opt_upgrade),
 	fsparam_flag_no("acl",                Opt_acl),
 	fsparam_flag_no("suiddir",            Opt_suiddir),
-	fsparam_enum   ("data",               Opt_data),
+	fsparam_enum   ("data",               Opt_data, gfs2_param_data),
 	fsparam_flag   ("meta",               Opt_meta),
 	fsparam_flag_no("discard",            Opt_discard),
 	fsparam_s32    ("commit",             Opt_commit),
-	fsparam_enum   ("errors",             Opt_errors),
+	fsparam_enum   ("errors",             Opt_errors, gfs2_param_errors),
 	fsparam_s32    ("statfs_quantum",     Opt_statfs_quantum),
 	fsparam_s32    ("statfs_percent",     Opt_statfs_percent),
 	fsparam_s32    ("quota_quantum",      Opt_quota_quantum),
@@ -1314,27 +1321,11 @@ static const struct fs_parameter_spec gfs2_param_specs[] = {
 	fsparam_flag_no("rgrplvb",            Opt_rgrplvb),
 	fsparam_flag_no("loccookie",          Opt_loccookie),
 	/* quota can be a flag or an enum so it gets special treatment */
-	__fsparam(fs_param_is_enum, "quota", Opt_quota, fs_param_neg_with_no|fs_param_v_optional),
-	{}
-};
-
-static const struct fs_parameter_enum gfs2_param_enums[] = {
-	{ Opt_quota,    "off",        Opt_quota_off },
-	{ Opt_quota,    "account",    Opt_quota_account },
-	{ Opt_quota,    "on",         Opt_quota_on },
-	{ Opt_data,     "writeback",  Opt_data_writeback },
-	{ Opt_data,     "ordered",    Opt_data_ordered },
-	{ Opt_errors,   "withdraw",   Opt_errors_withdraw },
-	{ Opt_errors,   "panic",      Opt_errors_panic },
+	fsparam_flag_no("quota",	      Opt_quota_flag),
+	fsparam_enum("quota",		      Opt_quota, gfs2_param_quota),
 	{}
 };
 
-static const struct fs_parameter_description gfs2_fs_parameters = {
-	.name = "gfs2",
-	.specs = gfs2_param_specs,
-	.enums = gfs2_param_enums,
-};
-
 /* Parse a single mount parameter */
 static int gfs2_parse_param(struct fs_context *fc, struct fs_parameter *param)
 {
@@ -1342,7 +1333,7 @@ static int gfs2_parse_param(struct fs_context *fc, struct fs_parameter *param)
 	struct fs_parse_result result;
 	int o;
 
-	o = fs_parse(fc, &gfs2_fs_parameters, param, &result);
+	o = fs_parse(fc, gfs2_fs_parameters, param, &result);
 	if (o < 0)
 		return o;
 
@@ -1370,7 +1361,7 @@ static int gfs2_parse_param(struct fs_context *fc, struct fs_parameter *param)
 		break;
 	case Opt_debug:
 		if (result.boolean && args->ar_errors == GFS2_ERRORS_PANIC)
-			return invalf(fc, "gfs2: -o debug and -o errors=panic are mutually exclusive");
+			return invalfc(fc, "-o debug and -o errors=panic are mutually exclusive");
 		args->ar_debug = result.boolean;
 		break;
 	case Opt_upgrade:
@@ -1379,17 +1370,11 @@ static int gfs2_parse_param(struct fs_context *fc, struct fs_parameter *param)
 	case Opt_acl:
 		args->ar_posix_acl = result.boolean;
 		break;
+	case Opt_quota_flag:
+		args->ar_quota = result.negated ? GFS2_QUOTA_OFF : GFS2_QUOTA_ON;
+		break;
 	case Opt_quota:
-		/* The quota option can be a flag or an enum. A non-zero int_32
-		   result means that we have an enum index. Otherwise we have
-		   to rely on the 'negated' flag to tell us whether 'quota' or
-		   'noquota' was specified. */
-		if (result.negated)
-			args->ar_quota = GFS2_QUOTA_OFF;
-		else if (result.int_32 > 0)
-			args->ar_quota = opt_quota_values[result.int_32];
-		else
-			args->ar_quota = GFS2_QUOTA_ON;
+		args->ar_quota = result.int_32;
 		break;
 	case Opt_suiddir:
 		args->ar_suiddir = result.boolean;
@@ -1406,27 +1391,27 @@ static int gfs2_parse_param(struct fs_context *fc, struct fs_parameter *param)
 		break;
 	case Opt_commit:
 		if (result.int_32 <= 0)
-			return invalf(fc, "gfs2: commit mount option requires a positive numeric argument");
+			return invalfc(fc, "commit mount option requires a positive numeric argument");
 		args->ar_commit = result.int_32;
 		break;
 	case Opt_statfs_quantum:
 		if (result.int_32 < 0)
-			return invalf(fc, "gfs2: statfs_quantum mount option requires a non-negative numeric argument");
+			return invalfc(fc, "statfs_quantum mount option requires a non-negative numeric argument");
 		args->ar_statfs_quantum = result.int_32;
 		break;
 	case Opt_quota_quantum:
 		if (result.int_32 <= 0)
-			return invalf(fc, "gfs2: quota_quantum mount option requires a positive numeric argument");
+			return invalfc(fc, "quota_quantum mount option requires a positive numeric argument");
 		args->ar_quota_quantum = result.int_32;
 		break;
 	case Opt_statfs_percent:
 		if (result.int_32 < 0 || result.int_32 > 100)
-			return invalf(fc, "gfs2: statfs_percent mount option requires a numeric argument between 0 and 100");
+			return invalfc(fc, "statfs_percent mount option requires a numeric argument between 0 and 100");
 		args->ar_statfs_percent = result.int_32;
 		break;
 	case Opt_errors:
 		if (args->ar_debug && result.uint_32 == GFS2_ERRORS_PANIC)
-			return invalf(fc, "gfs2: -o debug and -o errors=panic are mutually exclusive");
+			return invalfc(fc, "-o debug and -o errors=panic are mutually exclusive");
 		args->ar_errors = result.uint_32;
 		break;
 	case Opt_barrier:
@@ -1439,7 +1424,7 @@ static int gfs2_parse_param(struct fs_context *fc, struct fs_parameter *param)
 		args->ar_loccookie = result.boolean;
 		break;
 	default:
-		return invalf(fc, "gfs2: invalid mount option: %s", param->key);
+		return invalfc(fc, "invalid mount option: %s", param->key);
 	}
 	return 0;
 }
@@ -1465,27 +1450,27 @@ static int gfs2_reconfigure(struct fs_context *fc)
 	spin_unlock(&gt->gt_spin);
 
 	if (strcmp(newargs->ar_lockproto, oldargs->ar_lockproto)) {
-		errorf(fc, "gfs2: reconfiguration of locking protocol not allowed");
+		errorfc(fc, "reconfiguration of locking protocol not allowed");
 		return -EINVAL;
 	}
 	if (strcmp(newargs->ar_locktable, oldargs->ar_locktable)) {
-		errorf(fc, "gfs2: reconfiguration of lock table not allowed");
+		errorfc(fc, "reconfiguration of lock table not allowed");
 		return -EINVAL;
 	}
 	if (strcmp(newargs->ar_hostdata, oldargs->ar_hostdata)) {
-		errorf(fc, "gfs2: reconfiguration of host data not allowed");
+		errorfc(fc, "reconfiguration of host data not allowed");
 		return -EINVAL;
 	}
 	if (newargs->ar_spectator != oldargs->ar_spectator) {
-		errorf(fc, "gfs2: reconfiguration of spectator mode not allowed");
+		errorfc(fc, "reconfiguration of spectator mode not allowed");
 		return -EINVAL;
 	}
 	if (newargs->ar_localflocks != oldargs->ar_localflocks) {
-		errorf(fc, "gfs2: reconfiguration of localflocks not allowed");
+		errorfc(fc, "reconfiguration of localflocks not allowed");
 		return -EINVAL;
 	}
 	if (newargs->ar_meta != oldargs->ar_meta) {
-		errorf(fc, "gfs2: switching between gfs2 and gfs2meta not allowed");
+		errorfc(fc, "switching between gfs2 and gfs2meta not allowed");
 		return -EINVAL;
 	}
 	if (oldargs->ar_spectator)
@@ -1495,11 +1480,11 @@ static int gfs2_reconfigure(struct fs_context *fc)
 		if (fc->sb_flags & SB_RDONLY) {
 			error = gfs2_make_fs_ro(sdp);
 			if (error)
-				errorf(fc, "gfs2: unable to remount read-only");
+				errorfc(fc, "unable to remount read-only");
 		} else {
 			error = gfs2_make_fs_rw(sdp);
 			if (error)
-				errorf(fc, "gfs2: unable to remount read-write");
+				errorfc(fc, "unable to remount read-write");
 		}
 	}
 	sdp->sd_args = *newargs;
@@ -1644,7 +1629,7 @@ struct file_system_type gfs2_fs_type = {
 	.name = "gfs2",
 	.fs_flags = FS_REQUIRES_DEV,
 	.init_fs_context = gfs2_init_fs_context,
-	.parameters = &gfs2_fs_parameters,
+	.parameters = gfs2_fs_parameters,
 	.kill_sb = gfs2_kill_sb,
 	.owner = THIS_MODULE,
 };
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index a66e425884d1..aff8642f0c2e 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -73,7 +73,7 @@ enum hugetlb_param {
 	Opt_uid,
 };
 
-static const struct fs_parameter_spec hugetlb_param_specs[] = {
+static const struct fs_parameter_spec hugetlb_fs_parameters[] = {
 	fsparam_u32   ("gid",		Opt_gid),
 	fsparam_string("min_size",	Opt_min_size),
 	fsparam_u32   ("mode",		Opt_mode),
@@ -84,11 +84,6 @@ static const struct fs_parameter_spec hugetlb_param_specs[] = {
 	{}
 };
 
-static const struct fs_parameter_description hugetlb_fs_parameters = {
-	.name		= "hugetlbfs",
-	.specs		= hugetlb_param_specs,
-};
-
 #ifdef CONFIG_NUMA
 static inline void hugetlb_set_vma_policy(struct vm_area_struct *vma,
 					struct inode *inode, pgoff_t index)
@@ -1171,7 +1166,7 @@ static int hugetlbfs_parse_param(struct fs_context *fc, struct fs_parameter *par
 	unsigned long ps;
 	int opt;
 
-	opt = fs_parse(fc, &hugetlb_fs_parameters, param, &result);
+	opt = fs_parse(fc, hugetlb_fs_parameters, param, &result);
 	if (opt < 0)
 		return opt;
 
@@ -1233,7 +1228,7 @@ static int hugetlbfs_parse_param(struct fs_context *fc, struct fs_parameter *par
 	}
 
 bad_val:
-	return invalf(fc, "hugetlbfs: Bad value '%s' for mount option '%s'\n",
+	return invalfc(fc, "Bad value '%s' for mount option '%s'\n",
 		      param->string, param->key);
 }
 
@@ -1358,7 +1353,7 @@ static int hugetlbfs_init_fs_context(struct fs_context *fc)
 static struct file_system_type hugetlbfs_fs_type = {
 	.name			= "hugetlbfs",
 	.init_fs_context	= hugetlbfs_init_fs_context,
-	.parameters		= &hugetlb_fs_parameters,
+	.parameters		= hugetlb_fs_parameters,
 	.kill_sb		= kill_litter_super,
 };
 
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index 0e6406c4f362..05d7878dfad1 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -167,27 +167,21 @@ enum {
 	Opt_rp_size,
 };
 
-static const struct fs_parameter_spec jffs2_param_specs[] = {
-	fsparam_enum	("compr",	Opt_override_compr),
-	fsparam_u32	("rp_size",	Opt_rp_size),
-	{}
-};
-
-static const struct fs_parameter_enum jffs2_param_enums[] = {
-	{ Opt_override_compr,	"none",	JFFS2_COMPR_MODE_NONE },
+static const struct constant_table jffs2_param_compr[] = {
+	{"none",	JFFS2_COMPR_MODE_NONE },
 #ifdef CONFIG_JFFS2_LZO
-	{ Opt_override_compr,	"lzo",	JFFS2_COMPR_MODE_FORCELZO },
+	{"lzo",		JFFS2_COMPR_MODE_FORCELZO },
 #endif
 #ifdef CONFIG_JFFS2_ZLIB
-	{ Opt_override_compr,	"zlib",	JFFS2_COMPR_MODE_FORCEZLIB },
+	{"zlib",	JFFS2_COMPR_MODE_FORCEZLIB },
 #endif
 	{}
 };
 
-const struct fs_parameter_description jffs2_fs_parameters = {
-	.name		= "jffs2",
-	.specs		= jffs2_param_specs,
-	.enums		= jffs2_param_enums,
+static const struct fs_parameter_spec jffs2_fs_parameters[] = {
+	fsparam_enum	("compr",	Opt_override_compr, jffs2_param_compr),
+	fsparam_u32	("rp_size",	Opt_rp_size),
+	{}
 };
 
 static int jffs2_parse_param(struct fs_context *fc, struct fs_parameter *param)
@@ -196,7 +190,7 @@ static int jffs2_parse_param(struct fs_context *fc, struct fs_parameter *param)
 	struct jffs2_sb_info *c = fc->s_fs_info;
 	int opt;
 
-	opt = fs_parse(fc, &jffs2_fs_parameters, param, &result);
+	opt = fs_parse(fc, jffs2_fs_parameters, param, &result);
 	if (opt < 0)
 		return opt;
 
@@ -339,7 +333,7 @@ static struct file_system_type jffs2_fs_type = {
 	.owner =	THIS_MODULE,
 	.name =		"jffs2",
 	.init_fs_context = jffs2_init_fs_context,
-	.parameters =	&jffs2_fs_parameters,
+	.parameters =	jffs2_fs_parameters,
 	.kill_sb =	jffs2_kill_sb,
 };
 MODULE_ALIAS_FS("jffs2");
diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c
index 2c6dc1b6cc92..e1b938457ab9 100644
--- a/fs/nfs/fs_context.c
+++ b/fs/nfs/fs_context.c
@@ -45,6 +45,7 @@ enum nfs_param {
 	Opt_cto,
 	Opt_fg,
 	Opt_fscache,
+	Opt_fscache_flag,
 	Opt_hard,
 	Opt_intr,
 	Opt_local_lock,
@@ -83,7 +84,35 @@ enum nfs_param {
 	Opt_wsize,
 };
 
-static const struct fs_parameter_spec nfs_param_specs[] = {
+enum {
+	Opt_local_lock_all,
+	Opt_local_lock_flock,
+	Opt_local_lock_none,
+	Opt_local_lock_posix,
+};
+
+static const struct constant_table nfs_param_enums_local_lock[] = {
+	{ "all",		Opt_local_lock_all },
+	{ "flock",	Opt_local_lock_flock },
+	{ "none",		Opt_local_lock_none },
+	{}
+};
+
+enum {
+	Opt_lookupcache_all,
+	Opt_lookupcache_none,
+	Opt_lookupcache_positive,
+};
+
+static const struct constant_table nfs_param_enums_lookupcache[] = {
+	{ "all",		Opt_lookupcache_all },
+	{ "none",		Opt_lookupcache_none },
+	{ "pos",		Opt_lookupcache_positive },
+	{ "positive",		Opt_lookupcache_positive },
+	{}
+};
+
+static const struct fs_parameter_spec nfs_fs_parameters[] = {
 	fsparam_flag_no("ac",		Opt_ac),
 	fsparam_u32   ("acdirmax",	Opt_acdirmax),
 	fsparam_u32   ("acdirmin",	Opt_acdirmin),
@@ -97,14 +126,14 @@ static const struct fs_parameter_spec nfs_param_specs[] = {
 	fsparam_string("clientaddr",	Opt_clientaddr),
 	fsparam_flag_no("cto",		Opt_cto),
 	fsparam_flag  ("fg",		Opt_fg),
-	__fsparam(fs_param_is_string, "fsc",		Opt_fscache,
-		  fs_param_neg_with_no|fs_param_v_optional),
+	fsparam_flag_no("fsc",		Opt_fscache_flag),
+	fsparam_string("fsc",		Opt_fscache),
 	fsparam_flag  ("hard",		Opt_hard),
-	__fsparam(fs_param_is_flag, "intr",		Opt_intr,
-		  fs_param_neg_with_no|fs_param_deprecated),
-	fsparam_enum  ("local_lock",	Opt_local_lock),
+	__fsparam(NULL, "intr",		Opt_intr,
+		  fs_param_neg_with_no|fs_param_deprecated, NULL),
+	fsparam_enum  ("local_lock",	Opt_local_lock, nfs_param_enums_local_lock),
 	fsparam_flag_no("lock",		Opt_lock),
-	fsparam_enum  ("lookupcache",	Opt_lookupcache),
+	fsparam_enum  ("lookupcache",	Opt_lookupcache, nfs_param_enums_lookupcache),
 	fsparam_flag_no("migration",	Opt_migration),
 	fsparam_u32   ("minorversion",	Opt_minorversion),
 	fsparam_string("mountaddr",	Opt_mountaddr),
@@ -146,37 +175,6 @@ static const struct fs_parameter_spec nfs_param_specs[] = {
 };
 
 enum {
-	Opt_local_lock_all,
-	Opt_local_lock_flock,
-	Opt_local_lock_none,
-	Opt_local_lock_posix,
-};
-
-enum {
-	Opt_lookupcache_all,
-	Opt_lookupcache_none,
-	Opt_lookupcache_positive,
-};
-
-static const struct fs_parameter_enum nfs_param_enums[] = {
-	{ Opt_local_lock,	"all",		Opt_local_lock_all },
-	{ Opt_local_lock,	"flock",	Opt_local_lock_flock },
-	{ Opt_local_lock,	"none",		Opt_local_lock_none },
-	{ Opt_local_lock,	"posix",	Opt_local_lock_posix },
-	{ Opt_lookupcache,	"all",		Opt_lookupcache_all },
-	{ Opt_lookupcache,	"none",		Opt_lookupcache_none },
-	{ Opt_lookupcache,	"pos",		Opt_lookupcache_positive },
-	{ Opt_lookupcache,	"positive",	Opt_lookupcache_positive },
-	{}
-};
-
-static const struct fs_parameter_description nfs_fs_parameters = {
-	.name		= "nfs",
-	.specs		= nfs_param_specs,
-	.enums		= nfs_param_enums,
-};
-
-enum {
 	Opt_vers_2,
 	Opt_vers_3,
 	Opt_vers_4,
@@ -442,7 +440,7 @@ static int nfs_fs_context_parse_param(struct fs_context *fc,
 
 	dfprintk(MOUNT, "NFS:   parsing nfs mount option '%s'\n", param->key);
 
-	opt = fs_parse(fc, &nfs_fs_parameters, param, &result);
+	opt = fs_parse(fc, nfs_fs_parameters, param, &result);
 	if (opt < 0)
 		return ctx->sloppy ? 1 : opt;
 
@@ -540,14 +538,19 @@ static int nfs_fs_context_parse_param(struct fs_context *fc,
 		else
 			ctx->flags &= ~NFS_MOUNT_NORESVPORT;
 		break;
-	case Opt_fscache:
-		kfree(ctx->fscache_uniq);
-		ctx->fscache_uniq = param->string;
-		param->string = NULL;
+	case Opt_fscache_flag:
 		if (result.negated)
 			ctx->options &= ~NFS_OPTION_FSCACHE;
 		else
 			ctx->options |= NFS_OPTION_FSCACHE;
+		kfree(ctx->fscache_uniq);
+		ctx->fscache_uniq = NULL;
+		break;
+	case Opt_fscache:
+		ctx->options |= NFS_OPTION_FSCACHE;
+		kfree(ctx->fscache_uniq);
+		ctx->fscache_uniq = param->string;
+		param->string = NULL;
 		break;
 	case Opt_migration:
 		if (result.negated)
@@ -1415,7 +1418,7 @@ struct file_system_type nfs_fs_type = {
 	.owner			= THIS_MODULE,
 	.name			= "nfs",
 	.init_fs_context	= nfs_init_fs_context,
-	.parameters		= &nfs_fs_parameters,
+	.parameters		= nfs_fs_parameters,
 	.kill_sb		= nfs_kill_super,
 	.fs_flags		= FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA,
 };
@@ -1427,7 +1430,7 @@ struct file_system_type nfs4_fs_type = {
 	.owner			= THIS_MODULE,
 	.name			= "nfs4",
 	.init_fs_context	= nfs_init_fs_context,
-	.parameters		= &nfs_fs_parameters,
+	.parameters		= nfs_fs_parameters,
 	.kill_sb		= nfs_kill_super,
 	.fs_flags		= FS_RENAME_DOES_D_MOVE|FS_BINARY_MOUNTDATA,
 };
diff --git a/fs/proc/root.c b/fs/proc/root.c
index 72c07a34cff0..608233dfd29c 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -41,24 +41,19 @@ enum proc_param {
 	Opt_hidepid,
 };
 
-static const struct fs_parameter_spec proc_param_specs[] = {
+static const struct fs_parameter_spec proc_fs_parameters[] = {
 	fsparam_u32("gid",	Opt_gid),
 	fsparam_u32("hidepid",	Opt_hidepid),
 	{}
 };
 
-static const struct fs_parameter_description proc_fs_parameters = {
-	.name		= "proc",
-	.specs		= proc_param_specs,
-};
-
 static int proc_parse_param(struct fs_context *fc, struct fs_parameter *param)
 {
 	struct proc_fs_context *ctx = fc->fs_private;
 	struct fs_parse_result result;
 	int opt;
 
-	opt = fs_parse(fc, &proc_fs_parameters, param, &result);
+	opt = fs_parse(fc, proc_fs_parameters, param, &result);
 	if (opt < 0)
 		return opt;
 
@@ -71,7 +66,7 @@ static int proc_parse_param(struct fs_context *fc, struct fs_parameter *param)
 		ctx->hidepid = result.uint_32;
 		if (ctx->hidepid < HIDEPID_OFF ||
 		    ctx->hidepid > HIDEPID_INVISIBLE)
-			return invalf(fc, "proc: hidepid value must be between 0 and 2.\n");
+			return invalfc(fc, "hidepid value must be between 0 and 2.\n");
 		break;
 
 	default:
@@ -207,7 +202,7 @@ static void proc_kill_sb(struct super_block *sb)
 static struct file_system_type proc_fs_type = {
 	.name			= "proc",
 	.init_fs_context	= proc_init_fs_context,
-	.parameters		= &proc_fs_parameters,
+	.parameters		= proc_fs_parameters,
 	.kill_sb		= proc_kill_sb,
 	.fs_flags		= FS_USERNS_MOUNT | FS_DISALLOW_NOTIFY_PERM,
 };
diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index d82636e8eb65..ee179a81b3da 100644
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -181,23 +181,18 @@ enum ramfs_param {
 	Opt_mode,
 };
 
-static const struct fs_parameter_spec ramfs_param_specs[] = {
+const struct fs_parameter_spec ramfs_fs_parameters[] = {
 	fsparam_u32oct("mode",	Opt_mode),
 	{}
 };
 
-const struct fs_parameter_description ramfs_fs_parameters = {
-	.name		= "ramfs",
-	.specs		= ramfs_param_specs,
-};
-
 static int ramfs_parse_param(struct fs_context *fc, struct fs_parameter *param)
 {
 	struct fs_parse_result result;
 	struct ramfs_fs_info *fsi = fc->s_fs_info;
 	int opt;
 
-	opt = fs_parse(fc, &ramfs_fs_parameters, param, &result);
+	opt = fs_parse(fc, ramfs_fs_parameters, param, &result);
 	if (opt < 0) {
 		/*
 		 * We might like to report bad mount options here;
@@ -278,7 +273,7 @@ static void ramfs_kill_sb(struct super_block *sb)
 static struct file_system_type ramfs_fs_type = {
 	.name		= "ramfs",
 	.init_fs_context = ramfs_init_fs_context,
-	.parameters	= &ramfs_fs_parameters,
+	.parameters	= ramfs_fs_parameters,
 	.kill_sb	= ramfs_kill_sb,
 	.fs_flags	= FS_USERNS_MOUNT,
 };
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 760901783944..2094386af8ac 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -62,7 +62,7 @@ enum {
 	Opt_discard, Opt_nodiscard, Opt_dax,
 };
 
-static const struct fs_parameter_spec xfs_param_specs[] = {
+static const struct fs_parameter_spec xfs_fs_parameters[] = {
 	fsparam_u32("logbufs",		Opt_logbufs),
 	fsparam_string("logbsize",	Opt_logbsize),
 	fsparam_string("logdev",	Opt_logdev),
@@ -106,11 +106,6 @@ static const struct fs_parameter_spec xfs_param_specs[] = {
 	{}
 };
 
-static const struct fs_parameter_description xfs_fs_parameters = {
-	.name		= "xfs",
-	.specs		= xfs_param_specs,
-};
-
 struct proc_xfs_info {
 	uint64_t	flag;
 	char		*str;
@@ -1120,7 +1115,7 @@ xfs_fc_parse_param(
 	int			size = 0;
 	int			opt;
 
-	opt = fs_parse(fc, &xfs_fs_parameters, param, &result);
+	opt = fs_parse(fc, xfs_fs_parameters, param, &result);
 	if (opt < 0)
 		return opt;
 
@@ -1782,7 +1777,7 @@ static struct file_system_type xfs_fs_type = {
 	.owner			= THIS_MODULE,
 	.name			= "xfs",
 	.init_fs_context	= xfs_init_fs_context,
-	.parameters		= &xfs_fs_parameters,
+	.parameters		= xfs_fs_parameters,
 	.kill_sb		= kill_block_super,
 	.fs_flags		= FS_REQUIRES_DEV,
 };
diff --git a/include/linux/ceph/libceph.h b/include/linux/ceph/libceph.h
index 8fe9b80e80a5..ec73ebc4827d 100644
--- a/include/linux/ceph/libceph.h
+++ b/include/linux/ceph/libceph.h
@@ -281,11 +281,12 @@ extern int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid);
 extern void *ceph_kvmalloc(size_t size, gfp_t flags);
 
 struct fs_parameter;
+struct fc_log;
 struct ceph_options *ceph_alloc_options(void);
 int ceph_parse_mon_ips(const char *buf, size_t len, struct ceph_options *opt,
-		       struct fs_context *fc);
+		       struct fc_log *l);
 int ceph_parse_param(struct fs_parameter *param, struct ceph_options *opt,
-		     struct fs_context *fc);
+		     struct fc_log *l);
 int ceph_print_client_options(struct seq_file *m, struct ceph_client *client,
 			      bool show_all);
 extern void ceph_destroy_options(struct ceph_options *opt);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 320d51b24325..3cd4fe6b845e 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -67,7 +67,7 @@ struct fscrypt_operations;
 struct fsverity_info;
 struct fsverity_operations;
 struct fs_context;
-struct fs_parameter_description;
+struct fs_parameter_spec;
 
 extern void __init inode_init(void);
 extern void __init inode_init_early(void);
@@ -2235,7 +2235,7 @@ struct file_system_type {
 #define FS_DISALLOW_NOTIFY_PERM	16	/* Disable fanotify permission events */
 #define FS_RENAME_DOES_D_MOVE	32768	/* FS will handle d_move() during rename() internally. */
 	int (*init_fs_context)(struct fs_context *);
-	const struct fs_parameter_description *parameters;
+	const struct fs_parameter_spec *parameters;
 	struct dentry *(*mount) (struct file_system_type *, int,
 		       const char *, void *);
 	void (*kill_sb) (struct super_block *);
diff --git a/include/linux/fs_context.h b/include/linux/fs_context.h
index e5c14e2c53d3..e6c3e4c61dad 100644
--- a/include/linux/fs_context.h
+++ b/include/linux/fs_context.h
@@ -54,7 +54,6 @@ enum fs_value_type {
 	fs_value_is_string,		/* Value is a string */
 	fs_value_is_blob,		/* Value is a binary blob */
 	fs_value_is_filename,		/* Value is a filename* + dirfd */
-	fs_value_is_filename_empty,	/* Value is a filename* + dirfd + AT_EMPTY_PATH */
 	fs_value_is_file,		/* Value is a file* */
 };
 
@@ -74,6 +73,11 @@ struct fs_parameter {
 	int	dirfd;
 };
 
+struct p_log {
+	const char *prefix;
+	struct fc_log *log;
+};
+
 /*
  * Filesystem context for holding the parameters used in the creation or
  * reconfiguration of a superblock.
@@ -93,7 +97,7 @@ struct fs_context {
 	struct user_namespace	*user_ns;	/* The user namespace for this mount */
 	struct net		*net_ns;	/* The network namespace for this mount */
 	const struct cred	*cred;		/* The mounter's credentials */
-	struct fc_log		*log;		/* Logging buffer */
+	struct p_log		log;		/* Logging buffer */
 	const char		*source;	/* The source name (eg. dev path) */
 	void			*security;	/* Linux S&M options */
 	void			*s_fs_info;	/* Proposed s_fs_info */
@@ -182,9 +186,13 @@ struct fc_log {
 	char		*buffer[8];
 };
 
-extern __attribute__((format(printf, 2, 3)))
-void logfc(struct fs_context *fc, const char *fmt, ...);
+extern __attribute__((format(printf, 4, 5)))
+void logfc(struct fc_log *log, const char *prefix, char level, const char *fmt, ...);
 
+#define __logfc(fc, l, fmt, ...) logfc((fc)->log.log, NULL, \
+					l, fmt, ## __VA_ARGS__)
+#define __plog(p, l, fmt, ...) logfc((p)->log, (p)->prefix, \
+					l, fmt, ## __VA_ARGS__)
 /**
  * infof - Store supplementary informational message
  * @fc: The context in which to log the informational message
@@ -193,7 +201,9 @@ void logfc(struct fs_context *fc, const char *fmt, ...);
  * Store the supplementary informational message for the process if the process
  * has enabled the facility.
  */
-#define infof(fc, fmt, ...) ({ logfc(fc, "i "fmt, ## __VA_ARGS__); })
+#define infof(fc, fmt, ...) __logfc(fc, 'i', fmt, ## __VA_ARGS__)
+#define info_plog(p, fmt, ...) __plog(p, 'i', fmt, ## __VA_ARGS__)
+#define infofc(p, fmt, ...) __plog((&(fc)->log), 'i', fmt, ## __VA_ARGS__)
 
 /**
  * warnf - Store supplementary warning message
@@ -203,7 +213,9 @@ void logfc(struct fs_context *fc, const char *fmt, ...);
  * Store the supplementary warning message for the process if the process has
  * enabled the facility.
  */
-#define warnf(fc, fmt, ...) ({ logfc(fc, "w "fmt, ## __VA_ARGS__); })
+#define warnf(fc, fmt, ...) __logfc(fc, 'w', fmt, ## __VA_ARGS__)
+#define warn_plog(p, fmt, ...) __plog(p, 'w', fmt, ## __VA_ARGS__)
+#define warnfc(fc, fmt, ...) __plog((&(fc)->log), 'w', fmt, ## __VA_ARGS__)
 
 /**
  * errorf - Store supplementary error message
@@ -213,7 +225,9 @@ void logfc(struct fs_context *fc, const char *fmt, ...);
  * Store the supplementary error message for the process if the process has
  * enabled the facility.
  */
-#define errorf(fc, fmt, ...) ({ logfc(fc, "e "fmt, ## __VA_ARGS__); })
+#define errorf(fc, fmt, ...) __logfc(fc, 'e', fmt, ## __VA_ARGS__)
+#define error_plog(p, fmt, ...) __plog(p, 'e', fmt, ## __VA_ARGS__)
+#define errorfc(fc, fmt, ...) __plog((&(fc)->log), 'e', fmt, ## __VA_ARGS__)
 
 /**
  * invalf - Store supplementary invalid argument error message
@@ -223,6 +237,8 @@ void logfc(struct fs_context *fc, const char *fmt, ...);
  * Store the supplementary error message for the process if the process has
  * enabled the facility and return -EINVAL.
  */
-#define invalf(fc, fmt, ...) ({	errorf(fc, fmt, ## __VA_ARGS__); -EINVAL; })
+#define invalf(fc, fmt, ...) (errorf(fc, fmt, ## __VA_ARGS__), -EINVAL)
+#define inval_plog(p, fmt, ...) (error_plog(p, fmt, ## __VA_ARGS__), -EINVAL)
+#define invalfc(fc, fmt, ...) (errorfc(fc, fmt, ## __VA_ARGS__), -EINVAL)
 
 #endif /* _LINUX_FS_CONTEXT_H */
diff --git a/include/linux/fs_parser.h b/include/linux/fs_parser.h
index dee140db6240..2eab6d5f6736 100644
--- a/include/linux/fs_parser.h
+++ b/include/linux/fs_parser.h
@@ -17,26 +17,18 @@ struct constant_table {
 	int		value;
 };
 
+struct fs_parameter_spec;
+struct fs_parse_result;
+typedef int fs_param_type(struct p_log *,
+			  const struct fs_parameter_spec *,
+			  struct fs_parameter *,
+			  struct fs_parse_result *);
 /*
  * The type of parameter expected.
  */
-enum fs_parameter_type {
-	__fs_param_wasnt_defined,
-	fs_param_is_flag,
-	fs_param_is_bool,
-	fs_param_is_u32,
-	fs_param_is_u32_octal,
-	fs_param_is_u32_hex,
-	fs_param_is_s32,
-	fs_param_is_u64,
-	fs_param_is_enum,
-	fs_param_is_string,
-	fs_param_is_blob,
-	fs_param_is_blockdev,
-	fs_param_is_path,
-	fs_param_is_fd,
-	nr__fs_parameter_type,
-};
+fs_param_type fs_param_is_bool, fs_param_is_u32, fs_param_is_s32, fs_param_is_u64,
+	fs_param_is_enum, fs_param_is_string, fs_param_is_blob, fs_param_is_blockdev,
+	fs_param_is_path, fs_param_is_fd;
 
 /*
  * Specification of the type of value a parameter wants.
@@ -46,25 +38,13 @@ enum fs_parameter_type {
  */
 struct fs_parameter_spec {
 	const char		*name;
+	fs_param_type		*type;	/* The desired parameter type */
 	u8			opt;	/* Option number (returned by fs_parse()) */
-	enum fs_parameter_type	type:8;	/* The desired parameter type */
 	unsigned short		flags;
-#define fs_param_v_optional	0x0001	/* The value is optional */
 #define fs_param_neg_with_no	0x0002	/* "noxxx" is negative param */
 #define fs_param_neg_with_empty	0x0004	/* "xxx=" is negative param */
 #define fs_param_deprecated	0x0008	/* The param is deprecated */
-};
-
-struct fs_parameter_enum {
-	u8		opt;		/* Option number (as fs_parameter_spec::opt) */
-	char		name[14];
-	u8		value;
-};
-
-struct fs_parameter_description {
-	const char	name[16];		/* Name for logging purposes */
-	const struct fs_parameter_spec *specs;	/* List of param specifications */
-	const struct fs_parameter_enum *enums;	/* Enum values */
+	const void		*data;
 };
 
 /*
@@ -72,7 +52,6 @@ struct fs_parameter_description {
  */
 struct fs_parse_result {
 	bool			negated;	/* T if param was "noxxx" */
-	bool			has_value;	/* T if value supplied to param */
 	union {
 		bool		boolean;	/* For spec_bool */
 		int		int_32;		/* For spec_s32/spec_enum */
@@ -81,28 +60,37 @@ struct fs_parse_result {
 	};
 };
 
-extern int fs_parse(struct fs_context *fc,
-		    const struct fs_parameter_description *desc,
+extern int __fs_parse(struct p_log *log,
+		    const struct fs_parameter_spec *desc,
 		    struct fs_parameter *value,
 		    struct fs_parse_result *result);
+
+static inline int fs_parse(struct fs_context *fc,
+	     const struct fs_parameter_spec *desc,
+	     struct fs_parameter *param,
+	     struct fs_parse_result *result)
+{
+	return __fs_parse(&fc->log, desc, param, result);
+}
+
 extern int fs_lookup_param(struct fs_context *fc,
 			   struct fs_parameter *param,
 			   bool want_bdev,
 			   struct path *_path);
 
-extern int __lookup_constant(const struct constant_table tbl[], size_t tbl_size,
-			     const char *name, int not_found);
-#define lookup_constant(t, n, nf) __lookup_constant(t, ARRAY_SIZE(t), (n), (nf))
+extern int lookup_constant(const struct constant_table tbl[], const char *name, int not_found);
 
 #ifdef CONFIG_VALIDATE_FS_PARSER
 extern bool validate_constant_table(const struct constant_table *tbl, size_t tbl_size,
 				    int low, int high, int special);
-extern bool fs_validate_description(const struct fs_parameter_description *desc);
+extern bool fs_validate_description(const char *name,
+				    const struct fs_parameter_spec *desc);
 #else
 static inline bool validate_constant_table(const struct constant_table *tbl, size_t tbl_size,
 					   int low, int high, int special)
 { return true; }
-static inline bool fs_validate_description(const struct fs_parameter_description *desc)
+static inline bool fs_validate_description(const char *name,
+					   const struct fs_parameter_spec *desc)
 { return true; }
 #endif
 
@@ -115,33 +103,32 @@ static inline bool fs_validate_description(const struct fs_parameter_description
  * work, but any such case is probably a sign that new helper is needed.
  * Helpers will remain stable; low-level implementation may change.
  */
-#define __fsparam(TYPE, NAME, OPT, FLAGS) \
+#define __fsparam(TYPE, NAME, OPT, FLAGS, DATA) \
 	{ \
 		.name = NAME, \
 		.opt = OPT, \
 		.type = TYPE, \
-		.flags = FLAGS \
+		.flags = FLAGS, \
+		.data = DATA \
 	}
 
-#define fsparam_flag(NAME, OPT)	__fsparam(fs_param_is_flag, NAME, OPT, 0)
+#define fsparam_flag(NAME, OPT)	__fsparam(NULL, NAME, OPT, 0, NULL)
 #define fsparam_flag_no(NAME, OPT) \
-				__fsparam(fs_param_is_flag, NAME, OPT, \
-					    fs_param_neg_with_no)
-#define fsparam_bool(NAME, OPT)	__fsparam(fs_param_is_bool, NAME, OPT, 0)
-#define fsparam_u32(NAME, OPT)	__fsparam(fs_param_is_u32, NAME, OPT, 0)
+			__fsparam(NULL, NAME, OPT, fs_param_neg_with_no, NULL)
+#define fsparam_bool(NAME, OPT)	__fsparam(fs_param_is_bool, NAME, OPT, 0, NULL)
+#define fsparam_u32(NAME, OPT)	__fsparam(fs_param_is_u32, NAME, OPT, 0, NULL)
 #define fsparam_u32oct(NAME, OPT) \
-				__fsparam(fs_param_is_u32_octal, NAME, OPT, 0)
+			__fsparam(fs_param_is_u32, NAME, OPT, 0, (void *)8)
 #define fsparam_u32hex(NAME, OPT) \
-				__fsparam(fs_param_is_u32_hex, NAME, OPT, 0)
-#define fsparam_s32(NAME, OPT)	__fsparam(fs_param_is_s32, NAME, OPT, 0)
-#define fsparam_u64(NAME, OPT)	__fsparam(fs_param_is_u64, NAME, OPT, 0)
-#define fsparam_enum(NAME, OPT)	__fsparam(fs_param_is_enum, NAME, OPT, 0)
+			__fsparam(fs_param_is_u32_hex, NAME, OPT, 0, (void *16))
+#define fsparam_s32(NAME, OPT)	__fsparam(fs_param_is_s32, NAME, OPT, 0, NULL)
+#define fsparam_u64(NAME, OPT)	__fsparam(fs_param_is_u64, NAME, OPT, 0, NULL)
+#define fsparam_enum(NAME, OPT, array)	__fsparam(fs_param_is_enum, NAME, OPT, 0, array)
 #define fsparam_string(NAME, OPT) \
-				__fsparam(fs_param_is_string, NAME, OPT, 0)
-#define fsparam_blob(NAME, OPT)	__fsparam(fs_param_is_blob, NAME, OPT, 0)
-#define fsparam_bdev(NAME, OPT)	__fsparam(fs_param_is_blockdev, NAME, OPT, 0)
-#define fsparam_path(NAME, OPT)	__fsparam(fs_param_is_path, NAME, OPT, 0)
-#define fsparam_fd(NAME, OPT)	__fsparam(fs_param_is_fd, NAME, OPT, 0)
-
+				__fsparam(fs_param_is_string, NAME, OPT, 0, NULL)
+#define fsparam_blob(NAME, OPT)	__fsparam(fs_param_is_blob, NAME, OPT, 0, NULL)
+#define fsparam_bdev(NAME, OPT)	__fsparam(fs_param_is_blockdev, NAME, OPT, 0, NULL)
+#define fsparam_path(NAME, OPT)	__fsparam(fs_param_is_path, NAME, OPT, 0, NULL)
+#define fsparam_fd(NAME, OPT)	__fsparam(fs_param_is_fd, NAME, OPT, 0, NULL)
 
 #endif /* _LINUX_FS_PARSER_H */
diff --git a/include/linux/ramfs.h b/include/linux/ramfs.h
index b806a0ff6554..917528d102c4 100644
--- a/include/linux/ramfs.h
+++ b/include/linux/ramfs.h
@@ -2,6 +2,8 @@
 #ifndef _LINUX_RAMFS_H
 #define _LINUX_RAMFS_H
 
+#include <linux/fs_parser.h> // bleh...
+
 struct inode *ramfs_get_inode(struct super_block *sb, const struct inode *dir,
 	 umode_t mode, dev_t dev);
 extern int ramfs_init_fs_context(struct fs_context *fc);
@@ -16,7 +18,7 @@ ramfs_nommu_expand_for_mapping(struct inode *inode, size_t newsize)
 extern int ramfs_nommu_expand_for_mapping(struct inode *inode, size_t newsize);
 #endif
 
-extern const struct fs_parameter_description ramfs_fs_parameters;
+extern const struct fs_parameter_spec ramfs_fs_parameters[];
 extern const struct file_operations ramfs_file_operations;
 extern const struct vm_operations_struct generic_file_vm_ops;
 
diff --git a/include/linux/shmem_fs.h b/include/linux/shmem_fs.h
index de8e4b71e3ba..d56fefef8905 100644
--- a/include/linux/shmem_fs.h
+++ b/include/linux/shmem_fs.h
@@ -8,6 +8,7 @@
 #include <linux/pagemap.h>
 #include <linux/percpu_counter.h>
 #include <linux/xattr.h>
+#include <linux/fs_parser.h>
 
 /* inode in-kernel data */
 
@@ -49,7 +50,7 @@ static inline struct shmem_inode_info *SHMEM_I(struct inode *inode)
 /*
  * Functions in mm/shmem.c called directly from elsewhere:
  */
-extern const struct fs_parameter_description shmem_fs_parameters;
+extern const struct fs_parameter_spec shmem_fs_parameters[];
 extern int shmem_init(void);
 extern int shmem_init_fs_context(struct fs_context *fc);
 extern struct file *shmem_file_setup(const char *name,
diff --git a/kernel/bpf/inode.c b/kernel/bpf/inode.c
index bd2fd8eab470..5e40e7fccc21 100644
--- a/kernel/bpf/inode.c
+++ b/kernel/bpf/inode.c
@@ -569,16 +569,11 @@ enum {
 	OPT_MODE,
 };
 
-static const struct fs_parameter_spec bpf_param_specs[] = {
+static const struct fs_parameter_spec bpf_fs_parameters[] = {
 	fsparam_u32oct	("mode",			OPT_MODE),
 	{}
 };
 
-static const struct fs_parameter_description bpf_fs_parameters = {
-	.name		= "bpf",
-	.specs		= bpf_param_specs,
-};
-
 struct bpf_mount_opts {
 	umode_t mode;
 };
@@ -589,7 +584,7 @@ static int bpf_parse_param(struct fs_context *fc, struct fs_parameter *param)
 	struct fs_parse_result result;
 	int opt;
 
-	opt = fs_parse(fc, &bpf_fs_parameters, param, &result);
+	opt = fs_parse(fc, bpf_fs_parameters, param, &result);
 	if (opt < 0)
 		/* We might like to report bad mount options here, but
 		 * traditionally we've ignored all mount options, so we'd
@@ -665,7 +660,7 @@ static struct file_system_type bpf_fs_type = {
 	.owner		= THIS_MODULE,
 	.name		= "bpf",
 	.init_fs_context = bpf_init_fs_context,
-	.parameters	= &bpf_fs_parameters,
+	.parameters	= bpf_fs_parameters,
 	.kill_sb	= kill_litter_super,
 };
 
diff --git a/kernel/cgroup/cgroup-internal.h b/kernel/cgroup/cgroup-internal.h
index 90d1710fef6c..bfbeabc17a9d 100644
--- a/kernel/cgroup/cgroup-internal.h
+++ b/kernel/cgroup/cgroup-internal.h
@@ -7,7 +7,7 @@
 #include <linux/workqueue.h>
 #include <linux/list.h>
 #include <linux/refcount.h>
-#include <linux/fs_context.h>
+#include <linux/fs_parser.h>
 
 #define TRACE_CGROUP_PATH_LEN 1024
 extern spinlock_t trace_cgroup_path_lock;
@@ -265,7 +265,7 @@ extern const struct proc_ns_operations cgroupns_operations;
  */
 extern struct cftype cgroup1_base_files[];
 extern struct kernfs_syscall_ops cgroup1_kf_syscall_ops;
-extern const struct fs_parameter_description cgroup1_fs_parameters;
+extern const struct fs_parameter_spec cgroup1_fs_parameters[];
 
 int proc_cgroupstats_show(struct seq_file *m, void *v);
 bool cgroup1_ssid_disabled(int ssid);
diff --git a/kernel/cgroup/cgroup-v1.c b/kernel/cgroup/cgroup-v1.c
index 09f3a413f6f8..be1a1c83cdd1 100644
--- a/kernel/cgroup/cgroup-v1.c
+++ b/kernel/cgroup/cgroup-v1.c
@@ -18,8 +18,6 @@
 
 #include <trace/events/cgroup.h>
 
-#define cg_invalf(fc, fmt, ...) invalf(fc, fmt, ## __VA_ARGS__)
-
 /*
  * pidlists linger the following amount before being destroyed.  The goal
  * is avoiding frequent destruction in the middle of consecutive read calls
@@ -887,7 +885,7 @@ enum cgroup1_param {
 	Opt_xattr,
 };
 
-static const struct fs_parameter_spec cgroup1_param_specs[] = {
+const struct fs_parameter_spec cgroup1_fs_parameters[] = {
 	fsparam_flag  ("all",		Opt_all),
 	fsparam_flag  ("clone_children", Opt_clone_children),
 	fsparam_flag  ("cpuset_v2_mode", Opt_cpuset_v2_mode),
@@ -899,11 +897,6 @@ static const struct fs_parameter_spec cgroup1_param_specs[] = {
 	{}
 };
 
-const struct fs_parameter_description cgroup1_fs_parameters = {
-	.name		= "cgroup1",
-	.specs		= cgroup1_param_specs,
-};
-
 int cgroup1_parse_param(struct fs_context *fc, struct fs_parameter *param)
 {
 	struct cgroup_fs_context *ctx = cgroup_fc2context(fc);
@@ -911,7 +904,7 @@ int cgroup1_parse_param(struct fs_context *fc, struct fs_parameter *param)
 	struct fs_parse_result result;
 	int opt, i;
 
-	opt = fs_parse(fc, &cgroup1_fs_parameters, param, &result);
+	opt = fs_parse(fc, cgroup1_fs_parameters, param, &result);
 	if (opt == -ENOPARAM) {
 		if (strcmp(param->key, "source") == 0) {
 			fc->source = param->string;
@@ -924,7 +917,7 @@ int cgroup1_parse_param(struct fs_context *fc, struct fs_parameter *param)
 			ctx->subsys_mask |= (1 << i);
 			return 0;
 		}
-		return cg_invalf(fc, "cgroup1: Unknown subsys name '%s'", param->key);
+		return invalfc(fc, "Unknown subsys name '%s'", param->key);
 	}
 	if (opt < 0)
 		return opt;
@@ -952,7 +945,7 @@ int cgroup1_parse_param(struct fs_context *fc, struct fs_parameter *param)
 	case Opt_release_agent:
 		/* Specifying two release agents is forbidden */
 		if (ctx->release_agent)
-			return cg_invalf(fc, "cgroup1: release_agent respecified");
+			return invalfc(fc, "release_agent respecified");
 		ctx->release_agent = param->string;
 		param->string = NULL;
 		break;
@@ -962,9 +955,9 @@ int cgroup1_parse_param(struct fs_context *fc, struct fs_parameter *param)
 			return -ENOENT;
 		/* Can't specify an empty name */
 		if (!param->size)
-			return cg_invalf(fc, "cgroup1: Empty name");
+			return invalfc(fc, "Empty name");
 		if (param->size > MAX_CGROUP_ROOT_NAMELEN - 1)
-			return cg_invalf(fc, "cgroup1: Name too long");
+			return invalfc(fc, "Name too long");
 		/* Must match [\w.-]+ */
 		for (i = 0; i < param->size; i++) {
 			char c = param->string[i];
@@ -972,11 +965,11 @@ int cgroup1_parse_param(struct fs_context *fc, struct fs_parameter *param)
 				continue;
 			if ((c == '.') || (c == '-') || (c == '_'))
 				continue;
-			return cg_invalf(fc, "cgroup1: Invalid name");
+			return invalfc(fc, "Invalid name");
 		}
 		/* Specifying two names is forbidden */
 		if (ctx->name)
-			return cg_invalf(fc, "cgroup1: name respecified");
+			return invalfc(fc, "name respecified");
 		ctx->name = param->string;
 		param->string = NULL;
 		break;
@@ -1011,7 +1004,7 @@ static int check_cgroupfs_options(struct fs_context *fc)
 	if (ctx->all_ss) {
 		/* Mutually exclusive option 'all' + subsystem name */
 		if (ctx->subsys_mask)
-			return cg_invalf(fc, "cgroup1: subsys name conflicts with all");
+			return invalfc(fc, "subsys name conflicts with all");
 		/* 'all' => select all the subsystems */
 		ctx->subsys_mask = enabled;
 	}
@@ -1021,7 +1014,7 @@ static int check_cgroupfs_options(struct fs_context *fc)
 	 * empty hierarchies must have a name).
 	 */
 	if (!ctx->subsys_mask && !ctx->name)
-		return cg_invalf(fc, "cgroup1: Need name or subsystem set");
+		return invalfc(fc, "Need name or subsystem set");
 
 	/*
 	 * Option noprefix was introduced just for backward compatibility
@@ -1029,11 +1022,11 @@ static int check_cgroupfs_options(struct fs_context *fc)
 	 * the cpuset subsystem.
 	 */
 	if ((ctx->flags & CGRP_ROOT_NOPREFIX) && (ctx->subsys_mask & mask))
-		return cg_invalf(fc, "cgroup1: noprefix used incorrectly");
+		return invalfc(fc, "noprefix used incorrectly");
 
 	/* Can't specify "none" and some subsystems */
 	if (ctx->subsys_mask && ctx->none)
-		return cg_invalf(fc, "cgroup1: none used incorrectly");
+		return invalfc(fc, "none used incorrectly");
 
 	return 0;
 }
@@ -1063,7 +1056,7 @@ int cgroup1_reconfigure(struct fs_context *fc)
 	/* Don't allow flags or name to change at remount */
 	if ((ctx->flags ^ root->flags) ||
 	    (ctx->name && strcmp(ctx->name, root->name))) {
-		cg_invalf(fc, "option or name mismatch, new: 0x%x \"%s\", old: 0x%x \"%s\"",
+		errorfc(fc, "option or name mismatch, new: 0x%x \"%s\", old: 0x%x \"%s\"",
 		       ctx->flags, ctx->name ?: "", root->flags, root->name);
 		ret = -EINVAL;
 		goto out_unlock;
@@ -1180,7 +1173,7 @@ static int cgroup1_root_to_use(struct fs_context *fc)
 	 * can't create new one without subsys specification.
 	 */
 	if (!ctx->subsys_mask && !ctx->none)
-		return cg_invalf(fc, "cgroup1: No subsys list or none specified");
+		return invalfc(fc, "No subsys list or none specified");
 
 	/* Hierarchies may only be created in the initial cgroup namespace. */
 	if (ctx->ns != &init_cgroup_ns)
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index b3744872263e..db552b9f9377 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -1816,24 +1816,19 @@ enum cgroup2_param {
 	nr__cgroup2_params
 };
 
-static const struct fs_parameter_spec cgroup2_param_specs[] = {
+static const struct fs_parameter_spec cgroup2_fs_parameters[] = {
 	fsparam_flag("nsdelegate",		Opt_nsdelegate),
 	fsparam_flag("memory_localevents",	Opt_memory_localevents),
 	{}
 };
 
-static const struct fs_parameter_description cgroup2_fs_parameters = {
-	.name		= "cgroup2",
-	.specs		= cgroup2_param_specs,
-};
-
 static int cgroup2_parse_param(struct fs_context *fc, struct fs_parameter *param)
 {
 	struct cgroup_fs_context *ctx = cgroup_fc2context(fc);
 	struct fs_parse_result result;
 	int opt;
 
-	opt = fs_parse(fc, &cgroup2_fs_parameters, param, &result);
+	opt = fs_parse(fc, cgroup2_fs_parameters, param, &result);
 	if (opt < 0)
 		return opt;
 
@@ -2156,7 +2151,7 @@ static void cgroup_kill_sb(struct super_block *sb)
 struct file_system_type cgroup_fs_type = {
 	.name			= "cgroup",
 	.init_fs_context	= cgroup_init_fs_context,
-	.parameters		= &cgroup1_fs_parameters,
+	.parameters		= cgroup1_fs_parameters,
 	.kill_sb		= cgroup_kill_sb,
 	.fs_flags		= FS_USERNS_MOUNT,
 };
@@ -2164,7 +2159,7 @@ struct file_system_type cgroup_fs_type = {
 static struct file_system_type cgroup2_fs_type = {
 	.name			= "cgroup2",
 	.init_fs_context	= cgroup_init_fs_context,
-	.parameters		= &cgroup2_fs_parameters,
+	.parameters		= cgroup2_fs_parameters,
 	.kill_sb		= cgroup_kill_sb,
 	.fs_flags		= FS_USERNS_MOUNT,
 };
diff --git a/mm/shmem.c b/mm/shmem.c
index 8793e8cc1a48..c8f7540ef048 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -3381,9 +3381,19 @@ enum shmem_param {
 	Opt_uid,
 };
 
-static const struct fs_parameter_spec shmem_param_specs[] = {
+static const struct constant_table shmem_param_enums_huge[] = {
+	{"never",	SHMEM_HUGE_NEVER },
+	{"always",	SHMEM_HUGE_ALWAYS },
+	{"within_size",	SHMEM_HUGE_WITHIN_SIZE },
+	{"advise",	SHMEM_HUGE_ADVISE },
+	{"deny",	SHMEM_HUGE_DENY },
+	{"force",	SHMEM_HUGE_FORCE },
+	{}
+};
+
+const struct fs_parameter_spec shmem_fs_parameters[] = {
 	fsparam_u32   ("gid",		Opt_gid),
-	fsparam_enum  ("huge",		Opt_huge),
+	fsparam_enum  ("huge",		Opt_huge,  shmem_param_enums_huge),
 	fsparam_u32oct("mode",		Opt_mode),
 	fsparam_string("mpol",		Opt_mpol),
 	fsparam_string("nr_blocks",	Opt_nr_blocks),
@@ -3393,20 +3403,6 @@ static const struct fs_parameter_spec shmem_param_specs[] = {
 	{}
 };
 
-static const struct fs_parameter_enum shmem_param_enums[] = {
-	{ Opt_huge,	"never",	SHMEM_HUGE_NEVER },
-	{ Opt_huge,	"always",	SHMEM_HUGE_ALWAYS },
-	{ Opt_huge,	"within_size",	SHMEM_HUGE_WITHIN_SIZE },
-	{ Opt_huge,	"advise",	SHMEM_HUGE_ADVISE },
-	{}
-};
-
-const struct fs_parameter_description shmem_fs_parameters = {
-	.name		= "tmpfs",
-	.specs		= shmem_param_specs,
-	.enums		= shmem_param_enums,
-};
-
 static int shmem_parse_one(struct fs_context *fc, struct fs_parameter *param)
 {
 	struct shmem_options *ctx = fc->fs_private;
@@ -3415,7 +3411,7 @@ static int shmem_parse_one(struct fs_context *fc, struct fs_parameter *param)
 	char *rest;
 	int opt;
 
-	opt = fs_parse(fc, &shmem_fs_parameters, param, &result);
+	opt = fs_parse(fc, shmem_fs_parameters, param, &result);
 	if (opt < 0)
 		return opt;
 
@@ -3479,9 +3475,9 @@ static int shmem_parse_one(struct fs_context *fc, struct fs_parameter *param)
 	return 0;
 
 unsupported_parameter:
-	return invalf(fc, "tmpfs: Unsupported parameter '%s'", param->key);
+	return invalfc(fc, "Unsupported parameter '%s'", param->key);
 bad_value:
-	return invalf(fc, "tmpfs: Bad value for '%s'", param->key);
+	return invalfc(fc, "Bad value for '%s'", param->key);
 }
 
 static int shmem_parse_options(struct fs_context *fc, void *data)
@@ -3587,7 +3583,7 @@ static int shmem_reconfigure(struct fs_context *fc)
 	return 0;
 out:
 	spin_unlock(&sbinfo->stat_lock);
-	return invalf(fc, "tmpfs: %s", err);
+	return invalfc(fc, "%s", err);
 }
 
 static int shmem_show_options(struct seq_file *seq, struct dentry *root)
@@ -3889,7 +3885,7 @@ static struct file_system_type shmem_fs_type = {
 	.name		= "tmpfs",
 	.init_fs_context = shmem_init_fs_context,
 #ifdef CONFIG_TMPFS
-	.parameters	= &shmem_fs_parameters,
+	.parameters	= shmem_fs_parameters,
 #endif
 	.kill_sb	= kill_litter_super,
 	.fs_flags	= FS_USERNS_MOUNT,
@@ -4035,7 +4031,7 @@ bool shmem_huge_enabled(struct vm_area_struct *vma)
 static struct file_system_type shmem_fs_type = {
 	.name		= "tmpfs",
 	.init_fs_context = ramfs_init_fs_context,
-	.parameters	= &ramfs_fs_parameters,
+	.parameters	= ramfs_fs_parameters,
 	.kill_sb	= kill_litter_super,
 	.fs_flags	= FS_USERNS_MOUNT,
 };
diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c
index a9d6c97b5b0d..a0e97f6c1072 100644
--- a/net/ceph/ceph_common.c
+++ b/net/ceph/ceph_common.c
@@ -269,7 +269,7 @@ enum {
 	Opt_abort_on_full,
 };
 
-static const struct fs_parameter_spec ceph_param_specs[] = {
+static const struct fs_parameter_spec ceph_parameters[] = {
 	fsparam_flag	("abort_on_full",		Opt_abort_on_full),
 	fsparam_flag_no ("cephx_require_signatures",	Opt_cephx_require_signatures),
 	fsparam_flag_no ("cephx_sign_messages",		Opt_cephx_sign_messages),
@@ -283,18 +283,13 @@ static const struct fs_parameter_spec ceph_param_specs[] = {
 	fsparam_u32	("osd_request_timeout",		Opt_osd_request_timeout),
 	fsparam_u32	("osdkeepalive",		Opt_osdkeepalivetimeout),
 	__fsparam	(fs_param_is_s32, "osdtimeout", Opt_osdtimeout,
-			 fs_param_deprecated),
+			 fs_param_deprecated, NULL),
 	fsparam_string	("secret",			Opt_secret),
 	fsparam_flag_no ("share",			Opt_share),
 	fsparam_flag_no ("tcp_nodelay",			Opt_tcp_nodelay),
 	{}
 };
 
-static const struct fs_parameter_description ceph_parameters = {
-        .name           = "libceph",
-        .specs          = ceph_param_specs,
-};
-
 struct ceph_options *ceph_alloc_options(void)
 {
 	struct ceph_options *opt;
@@ -337,7 +332,7 @@ EXPORT_SYMBOL(ceph_destroy_options);
 
 /* get secret from key store */
 static int get_secret(struct ceph_crypto_key *dst, const char *name,
-		      struct fs_context *fc)
+		      struct p_log *log)
 {
 	struct key *ukey;
 	int key_err;
@@ -351,19 +346,19 @@ static int get_secret(struct ceph_crypto_key *dst, const char *name,
 		key_err = PTR_ERR(ukey);
 		switch (key_err) {
 		case -ENOKEY:
-			errorf(fc, "libceph: Failed due to key not found: %s",
+			error_plog(log, "Failed due to key not found: %s",
 			       name);
 			break;
 		case -EKEYEXPIRED:
-			errorf(fc, "libceph: Failed due to expired key: %s",
+			error_plog(log, "Failed due to expired key: %s",
 			       name);
 			break;
 		case -EKEYREVOKED:
-			errorf(fc, "libceph: Failed due to revoked key: %s",
+			error_plog(log, "Failed due to revoked key: %s",
 			       name);
 			break;
 		default:
-			errorf(fc, "libceph: Failed due to key error %d: %s",
+			error_plog(log, "Failed due to key error %d: %s",
 			       key_err, name);
 		}
 		err = -EPERM;
@@ -383,15 +378,16 @@ out:
 }
 
 int ceph_parse_mon_ips(const char *buf, size_t len, struct ceph_options *opt,
-		       struct fs_context *fc)
+		       struct fc_log *l)
 {
+	struct p_log log = {.prefix = "libceph", .log = l};
 	int ret;
 
 	/* ip1[:port1][,ip2[:port2]...] */
 	ret = ceph_parse_ips(buf, buf + len, opt->mon_addr, CEPH_MAX_MON,
 			     &opt->num_mon);
 	if (ret) {
-		errorf(fc, "libceph: Failed to parse monitor IPs: %d", ret);
+		error_plog(&log, "Failed to parse monitor IPs: %d", ret);
 		return ret;
 	}
 
@@ -400,12 +396,13 @@ int ceph_parse_mon_ips(const char *buf, size_t len, struct ceph_options *opt,
 EXPORT_SYMBOL(ceph_parse_mon_ips);
 
 int ceph_parse_param(struct fs_parameter *param, struct ceph_options *opt,
-		     struct fs_context *fc)
+		     struct fc_log *l)
 {
 	struct fs_parse_result result;
 	int token, err;
+	struct p_log log = {.prefix = "libceph", .log = l};
 
-	token = fs_parse(fc, &ceph_parameters, param, &result);
+	token = __fs_parse(&log, ceph_parameters, param, &result);
 	dout("%s fs_parse '%s' token %d\n", __func__, param->key, token);
 	if (token < 0)
 		return token;
@@ -417,7 +414,7 @@ int ceph_parse_param(struct fs_parameter *param, struct ceph_options *opt,
 				     &opt->my_addr,
 				     1, NULL);
 		if (err) {
-			errorf(fc, "libceph: Failed to parse ip: %d", err);
+			error_plog(&log, "Failed to parse ip: %d", err);
 			return err;
 		}
 		opt->flags |= CEPH_OPT_MYIP;
@@ -426,7 +423,7 @@ int ceph_parse_param(struct fs_parameter *param, struct ceph_options *opt,
 	case Opt_fsid:
 		err = parse_fsid(param->string, &opt->fsid);
 		if (err) {
-			errorf(fc, "libceph: Failed to parse fsid: %d", err);
+			error_plog(&log, "Failed to parse fsid: %d", err);
 			return err;
 		}
 		opt->flags |= CEPH_OPT_FSID;
@@ -445,7 +442,7 @@ int ceph_parse_param(struct fs_parameter *param, struct ceph_options *opt,
 			return -ENOMEM;
 		err = ceph_crypto_key_unarmor(opt->key, param->string);
 		if (err) {
-			errorf(fc, "libceph: Failed to parse secret: %d", err);
+			error_plog(&log, "Failed to parse secret: %d", err);
 			return err;
 		}
 		break;
@@ -456,10 +453,10 @@ int ceph_parse_param(struct fs_parameter *param, struct ceph_options *opt,
 		opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
 		if (!opt->key)
 			return -ENOMEM;
-		return get_secret(opt->key, param->string, fc);
+		return get_secret(opt->key, param->string, &log);
 
 	case Opt_osdtimeout:
-		warnf(fc, "libceph: Ignoring osdtimeout");
+		warn_plog(&log, "Ignoring osdtimeout");
 		break;
 	case Opt_osdkeepalivetimeout:
 		/* 0 isn't well defined right now, reject it */
@@ -530,7 +527,7 @@ int ceph_parse_param(struct fs_parameter *param, struct ceph_options *opt,
 	return 0;
 
 out_of_range:
-	return invalf(fc, "libceph: %s out of range", param->key);
+	return inval_plog(&log, "%s out of range", param->key);
 }
 EXPORT_SYMBOL(ceph_parse_param);
 
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index d9e8b2131a65..4b6991e178d3 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2778,7 +2778,7 @@ static int selinux_fs_context_dup(struct fs_context *fc,
 	return 0;
 }
 
-static const struct fs_parameter_spec selinux_param_specs[] = {
+static const struct fs_parameter_spec selinux_fs_parameters[] = {
 	fsparam_string(CONTEXT_STR,	Opt_context),
 	fsparam_string(DEFCONTEXT_STR,	Opt_defcontext),
 	fsparam_string(FSCONTEXT_STR,	Opt_fscontext),
@@ -2787,18 +2787,13 @@ static const struct fs_parameter_spec selinux_param_specs[] = {
 	{}
 };
 
-static const struct fs_parameter_description selinux_fs_parameters = {
-	.name		= "SELinux",
-	.specs		= selinux_param_specs,
-};
-
 static int selinux_fs_context_parse_param(struct fs_context *fc,
 					  struct fs_parameter *param)
 {
 	struct fs_parse_result result;
 	int opt, rc;
 
-	opt = fs_parse(fc, &selinux_fs_parameters, param, &result);
+	opt = fs_parse(fc, selinux_fs_parameters, param, &result);
 	if (opt < 0)
 		return opt;
 
@@ -7193,7 +7188,7 @@ static __init int selinux_init(void)
 	else
 		pr_debug("SELinux:  Starting in permissive mode\n");
 
-	fs_validate_description(&selinux_fs_parameters);
+	fs_validate_description("selinux", selinux_fs_parameters);
 
 	return 0;
 }
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 8bc7b04769a8..8c61d175e195 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -678,7 +678,7 @@ static int smack_fs_context_dup(struct fs_context *fc,
 	return 0;
 }
 
-static const struct fs_parameter_spec smack_param_specs[] = {
+static const struct fs_parameter_spec smack_fs_parameters[] = {
 	fsparam_string("smackfsdef",		Opt_fsdefault),
 	fsparam_string("smackfsdefault",	Opt_fsdefault),
 	fsparam_string("smackfsfloor",		Opt_fsfloor),
@@ -688,11 +688,6 @@ static const struct fs_parameter_spec smack_param_specs[] = {
 	{}
 };
 
-static const struct fs_parameter_description smack_fs_parameters = {
-	.name		= "smack",
-	.specs		= smack_param_specs,
-};
-
 /**
  * smack_fs_context_parse_param - Parse a single mount parameter
  * @fc: The new filesystem context being constructed.
@@ -707,7 +702,7 @@ static int smack_fs_context_parse_param(struct fs_context *fc,
 	struct fs_parse_result result;
 	int opt, rc;
 
-	opt = fs_parse(fc, &smack_fs_parameters, param, &result);
+	opt = fs_parse(fc, smack_fs_parameters, param, &result);
 	if (opt < 0)
 		return opt;