nfs: disintegrate UAPI for nfs

This is to complete part of the Userspace API (UAPI) disintegration for which
the preparatory patches were pulled recently.  After these patches, userspace
headers will be segregated into:

        include/uapi/linux/.../foo.h

for the userspace interface stuff, and:

        include/linux/.../foo.h

for the strictly kernel internal stuff.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 60 insertions, 41 deletions

diff --git a/fs/fat/fat.h b/fs/fat/fat.h
index 2deeeb8..ca7e8f8 100644
--- a/fs/fat/fat.h
+++ b/fs/fat/fat.h
@@ -5,6 +5,7 @@
 #include <linux/string.h>
 #include <linux/nls.h>
 #include <linux/fs.h>
+#include <linux/hash.h>
 #include <linux/mutex.h>
 #include <linux/ratelimit.h>
 #include <linux/msdos_fs.h>
@@ -23,30 +24,31 @@
 #define FAT_ERRORS_RO		3      /* remount r/o on error */
 
 struct fat_mount_options {
-	uid_t fs_uid;
-	gid_t fs_gid;
+	kuid_t fs_uid;
+	kgid_t fs_gid;
 	unsigned short fs_fmask;
 	unsigned short fs_dmask;
-	unsigned short codepage;  /* Codepage for shortname conversions */
-	char *iocharset;          /* Charset used for filename input/display */
-	unsigned short shortname; /* flags for shortname display/create rule */
-	unsigned char name_check; /* r = relaxed, n = normal, s = strict */
-	unsigned char errors;	  /* On error: continue, panic, remount-ro */
+	unsigned short codepage;   /* Codepage for shortname conversions */
+	char *iocharset;           /* Charset used for filename input/display */
+	unsigned short shortname;  /* flags for shortname display/create rule */
+	unsigned char name_check;  /* r = relaxed, n = normal, s = strict */
+	unsigned char errors;	   /* On error: continue, panic, remount-ro */
 	unsigned short allow_utime;/* permission for setting the [am]time */
-	unsigned quiet:1,         /* set = fake successful chmods and chowns */
-		 showexec:1,      /* set = only set x bit for com/exe/bat */
-		 sys_immutable:1, /* set = system files are immutable */
-		 dotsOK:1,        /* set = hidden and system files are named '.filename' */
-		 isvfat:1,        /* 0=no vfat long filename support, 1=vfat support */
-		 utf8:1,	  /* Use of UTF-8 character set (Default) */
-		 unicode_xlate:1, /* create escape sequences for unhandled Unicode */
-		 numtail:1,       /* Does first alias have a numeric '~1' type tail? */
-		 flush:1,	  /* write things quickly */
-		 nocase:1,	  /* Does this need case conversion? 0=need case conversion*/
-		 usefree:1,	  /* Use free_clusters for FAT32 */
-		 tz_utc:1,	  /* Filesystem timestamps are in UTC */
-		 rodir:1,	  /* allow ATTR_RO for directory */
-		 discard:1;	  /* Issue discard requests on deletions */
+	unsigned quiet:1,          /* set = fake successful chmods and chowns */
+		 showexec:1,       /* set = only set x bit for com/exe/bat */
+		 sys_immutable:1,  /* set = system files are immutable */
+		 dotsOK:1,         /* set = hidden and system files are named '.filename' */
+		 isvfat:1,         /* 0=no vfat long filename support, 1=vfat support */
+		 utf8:1,	   /* Use of UTF-8 character set (Default) */
+		 unicode_xlate:1,  /* create escape sequences for unhandled Unicode */
+		 numtail:1,        /* Does first alias have a numeric '~1' type tail? */
+		 flush:1,	   /* write things quickly */
+		 nocase:1,	   /* Does this need case conversion? 0=need case conversion*/
+		 usefree:1,	   /* Use free_clusters for FAT32 */
+		 tz_utc:1,	   /* Filesystem timestamps are in UTC */
+		 rodir:1,	   /* allow ATTR_RO for directory */
+		 discard:1,	   /* Issue discard requests on deletions */
+		 nfs:1;		   /* Do extra work needed for NFS export */
 };
 
 #define FAT_HASH_BITS	8
@@ -56,28 +58,28 @@ struct fat_mount_options {
  * MS-DOS file system in-core superblock data
  */
 struct msdos_sb_info {
-	unsigned short sec_per_clus; /* sectors/cluster */
-	unsigned short cluster_bits; /* log2(cluster_size) */
-	unsigned int cluster_size;   /* cluster size */
-	unsigned char fats,fat_bits; /* number of FATs, FAT bits (12 or 16) */
+	unsigned short sec_per_clus;  /* sectors/cluster */
+	unsigned short cluster_bits;  /* log2(cluster_size) */
+	unsigned int cluster_size;    /* cluster size */
+	unsigned char fats, fat_bits; /* number of FATs, FAT bits (12 or 16) */
 	unsigned short fat_start;
-	unsigned long fat_length;    /* FAT start & length (sec.) */
+	unsigned long fat_length;     /* FAT start & length (sec.) */
 	unsigned long dir_start;
-	unsigned short dir_entries;  /* root dir start & entries */
-	unsigned long data_start;    /* first data sector */
-	unsigned long max_cluster;   /* maximum cluster number */
-	unsigned long root_cluster;  /* first cluster of the root directory */
-	unsigned long fsinfo_sector; /* sector number of FAT32 fsinfo */
+	unsigned short dir_entries;   /* root dir start & entries */
+	unsigned long data_start;     /* first data sector */
+	unsigned long max_cluster;    /* maximum cluster number */
+	unsigned long root_cluster;   /* first cluster of the root directory */
+	unsigned long fsinfo_sector;  /* sector number of FAT32 fsinfo */
 	struct mutex fat_lock;
-	unsigned int prev_free;      /* previously allocated cluster number */
-	unsigned int free_clusters;  /* -1 if undefined */
+	unsigned int prev_free;       /* previously allocated cluster number */
+	unsigned int free_clusters;   /* -1 if undefined */
 	unsigned int free_clus_valid; /* is free_clusters valid? */
 	struct fat_mount_options options;
-	struct nls_table *nls_disk;  /* Codepage used on disk */
-	struct nls_table *nls_io;    /* Charset used for input and display */
-	const void *dir_ops;		     /* Opaque; default directory operations */
-	int dir_per_block;	     /* dir entries per block */
-	int dir_per_block_bits;	     /* log2(dir_per_block) */
+	struct nls_table *nls_disk;   /* Codepage used on disk */
+	struct nls_table *nls_io;     /* Charset used for input and display */
+	const void *dir_ops;	      /* Opaque; default directory operations */
+	int dir_per_block;	      /* dir entries per block */
+	int dir_per_block_bits;	      /* log2(dir_per_block) */
 
 	int fatent_shift;
 	struct fatent_operations *fatent_ops;
@@ -88,6 +90,9 @@ struct msdos_sb_info {
 
 	spinlock_t inode_hash_lock;
 	struct hlist_head inode_hashtable[FAT_HASH_SIZE];
+
+	spinlock_t dir_hash_lock;
+	struct hlist_head dir_hashtable[FAT_HASH_SIZE];
 };
 
 #define FAT_CACHE_VALID	0	/* special case for valid cache */
@@ -110,6 +115,7 @@ struct msdos_inode_info {
 	int i_attrs;		/* unused attribute bits */
 	loff_t i_pos;		/* on-disk position of directory entry or 0 */
 	struct hlist_node i_fat_hash;	/* hash by i_location */
+	struct hlist_node i_dir_hash;	/* hash by i_logstart */
 	struct rw_semaphore truncate_lock; /* protect bmap against truncate */
 	struct inode vfs_inode;
 };
@@ -262,7 +268,7 @@ extern int fat_subdirs(struct inode *dir);
 extern int fat_scan(struct inode *dir, const unsigned char *name,
 		    struct fat_slot_info *sinfo);
 extern int fat_get_dotdot_entry(struct inode *dir, struct buffer_head **bh,
-				struct msdos_dir_entry **de, loff_t *i_pos);
+				struct msdos_dir_entry **de);
 extern int fat_alloc_new_dir(struct inode *dir, struct timespec *ts);
 extern int fat_add_entries(struct inode *dir, void *slots, int nr_slots,
 			   struct fat_slot_info *sinfo);
@@ -322,7 +328,7 @@ extern long fat_generic_ioctl(struct file *filp, unsigned int cmd,
 			      unsigned long arg);
 extern const struct file_operations fat_file_operations;
 extern const struct inode_operations fat_file_inode_operations;
-extern int fat_setattr(struct dentry * dentry, struct iattr * attr);
+extern int fat_setattr(struct dentry *dentry, struct iattr *attr);
 extern void fat_truncate_blocks(struct inode *inode, loff_t offset);
 extern int fat_getattr(struct vfsmount *mnt, struct dentry *dentry,
 		       struct kstat *stat);
@@ -340,7 +346,12 @@ extern int fat_fill_super(struct super_block *sb, void *data, int silent,
 			  int isvfat, void (*setup)(struct super_block *));
 
 extern int fat_flush_inodes(struct super_block *sb, struct inode *i1,
-		            struct inode *i2);
+			    struct inode *i2);
+static inline unsigned long fat_dir_hash(int logstart)
+{
+	return hash_32(logstart, FAT_HASH_BITS);
+}
+
 /* fat/misc.c */
 extern __printf(3, 4) __cold
 void __fat_fs_error(struct super_block *sb, int report, const char *fmt, ...);
@@ -366,6 +377,14 @@ extern int fat_sync_bhs(struct buffer_head **bhs, int nr_bhs);
 int fat_cache_init(void);
 void fat_cache_destroy(void);
 
+/* fat/nfs.c */
+struct fid;
+extern struct dentry *fat_fh_to_dentry(struct super_block *sb, struct fid *fid,
+				       int fh_len, int fh_type);
+extern struct dentry *fat_fh_to_parent(struct super_block *sb, struct fid *fid,
+				       int fh_len, int fh_type);
+extern struct dentry *fat_get_parent(struct dentry *child_dir);
+
 /* helper for printk */
 typedef unsigned long long	llu;