Merge tag 'vfs-7.1-rc1.kino' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull vfs i_ino updates from Christian Brauner:
 "For historical reasons, the inode->i_ino field is an unsigned long,
  which means that it's 32 bits on 32 bit architectures. This has caused
  a number of filesystems to implement hacks to hash a 64-bit identifier
  into a 32-bit field, and deprives us of a universal identifier field
  for an inode.

  This changes the inode->i_ino field from an unsigned long to a u64.
  This shouldn't make any material difference on 64-bit hosts, but
  32-bit hosts will see struct inode grow by at least 4 bytes. This
  could have effects on slabcache sizes and field alignment.

  The bulk of the changes are to format strings and tracepoints, since
  the kernel itself doesn't care that much about the i_ino field. The
  first patch changes some vfs function arguments, so check that one out
  carefully.

  With this change, we may be able to shrink some inode structures. For
  instance, struct nfs_inode has a fileid field that holds the 64-bit
  inode number. With this set of changes, that field could be
  eliminated. I'd rather leave that sort of cleanups for later just to
  keep this simple"

* tag 'vfs-7.1-rc1.kino' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  nilfs2: fix 64-bit division operations in nilfs_bmap_find_target_in_group()
  EVM: add comment describing why ino field is still unsigned long
  vfs: remove externs from fs.h on functions modified by i_ino widening
  treewide: fix missed i_ino format specifier conversions
  ext4: fix signed format specifier in ext4_load_inode trace event
  treewide: change inode->i_ino from unsigned long to u64
  nilfs2: widen trace event i_ino fields to u64
  f2fs: widen trace event i_ino fields to u64
  ext4: widen trace event i_ino fields to u64
  zonefs: widen trace event i_ino fields to u64
  hugetlbfs: widen trace event i_ino fields to u64
  ext2: widen trace event i_ino fields to u64
  cachefiles: widen trace event i_ino fields to u64
  vfs: widen trace event i_ino fields to u64
  net: change sock.sk_ino and sock_i_ino() to u64
  audit: widen ino fields to u64
  vfs: widen inode hash/lookup functions to u64

2 files changed, 44 insertions, 46 deletions

diff --git a/include/linux/audit.h b/include/linux/audit.h
index b642b5faca65..b915aaa7ed73 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -15,7 +15,7 @@
 #include <uapi/linux/audit.h>
 #include <uapi/linux/fanotify.h>
 
-#define AUDIT_INO_UNSET ((unsigned long)-1)
+#define AUDIT_INO_UNSET ((u64)-1)
 #define AUDIT_DEV_UNSET ((dev_t)-1)
 
 struct audit_sig_info {
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 8b3dd145b25e..23f36a2613a3 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -783,7 +783,7 @@ struct inode {
 #endif
 
 	/* Stat data, not accessed from path walking */
-	unsigned long		i_ino;
+	u64			i_ino;
 	/*
 	 * Filesystems may only read i_nlink directly.  They shall use the
 	 * following functions for modification:
@@ -2912,65 +2912,63 @@ static inline bool name_contains_dotdot(const char *name)
 #include <linux/err.h>
 
 /* needed for stackable file system support */
-extern loff_t default_llseek(struct file *file, loff_t offset, int whence);
+loff_t default_llseek(struct file *file, loff_t offset, int whence);
 
-extern loff_t vfs_llseek(struct file *file, loff_t offset, int whence);
+loff_t vfs_llseek(struct file *file, loff_t offset, int whence);
 
-extern int inode_init_always_gfp(struct super_block *, struct inode *, gfp_t);
+int inode_init_always_gfp(struct super_block *sb, struct inode *inode, gfp_t gfp);
 static inline int inode_init_always(struct super_block *sb, struct inode *inode)
 {
 	return inode_init_always_gfp(sb, inode, GFP_NOFS);
 }
 
-extern void inode_init_once(struct inode *);
-extern void address_space_init_once(struct address_space *mapping);
-extern struct inode * igrab(struct inode *);
-extern ino_t iunique(struct super_block *, ino_t);
-extern int inode_needs_sync(struct inode *inode);
-extern int inode_just_drop(struct inode *inode);
+void inode_init_once(struct inode *inode);
+void address_space_init_once(struct address_space *mapping);
+struct inode *igrab(struct inode *inode);
+ino_t iunique(struct super_block *sb, ino_t max_reserved);
+int inode_needs_sync(struct inode *inode);
+int inode_just_drop(struct inode *inode);
 static inline int inode_generic_drop(struct inode *inode)
 {
 	return !inode->i_nlink || inode_unhashed(inode);
 }
-extern void d_mark_dontcache(struct inode *inode);
+void d_mark_dontcache(struct inode *inode);
 
-extern struct inode *ilookup5_nowait(struct super_block *sb,
-		unsigned long hashval, int (*test)(struct inode *, void *),
-		void *data, bool *isnew);
-extern struct inode *ilookup5(struct super_block *sb, unsigned long hashval,
-		int (*test)(struct inode *, void *), void *data);
-extern struct inode *ilookup(struct super_block *sb, unsigned long ino);
+struct inode *ilookup5_nowait(struct super_block *sb, u64 hashval,
+			      int (*test)(struct inode *, void *), void *data,
+			      bool *isnew);
+struct inode *ilookup5(struct super_block *sb, u64 hashval,
+		       int (*test)(struct inode *, void *), void *data);
+struct inode *ilookup(struct super_block *sb, u64 ino);
 
-extern struct inode *inode_insert5(struct inode *inode, unsigned long hashval,
-		int (*test)(struct inode *, void *),
-		int (*set)(struct inode *, void *),
-		void *data);
-struct inode *iget5_locked(struct super_block *, unsigned long,
+struct inode *inode_insert5(struct inode *inode, u64 hashval,
+			    int (*test)(struct inode *, void *),
+			    int (*set)(struct inode *, void *), void *data);
+struct inode *iget5_locked(struct super_block *sb, u64 hashval,
 			   int (*test)(struct inode *, void *),
-			   int (*set)(struct inode *, void *), void *);
-struct inode *iget5_locked_rcu(struct super_block *, unsigned long,
+			   int (*set)(struct inode *, void *), void *data);
+struct inode *iget5_locked_rcu(struct super_block *sb, u64 hashval,
 			       int (*test)(struct inode *, void *),
-			       int (*set)(struct inode *, void *), void *);
-extern struct inode * iget_locked(struct super_block *, unsigned long);
-extern struct inode *find_inode_nowait(struct super_block *,
-				       unsigned long,
-				       int (*match)(struct inode *,
-						    unsigned long, void *),
-				       void *data);
-extern struct inode *find_inode_rcu(struct super_block *, unsigned long,
-				    int (*)(struct inode *, void *), void *);
-extern struct inode *find_inode_by_ino_rcu(struct super_block *, unsigned long);
-extern int insert_inode_locked4(struct inode *, unsigned long, int (*test)(struct inode *, void *), void *);
-extern int insert_inode_locked(struct inode *);
+			       int (*set)(struct inode *, void *), void *data);
+struct inode *iget_locked(struct super_block *sb, u64 ino);
+struct inode *find_inode_nowait(struct super_block *sb, u64 hashval,
+				int (*match)(struct inode *, u64, void *),
+				void *data);
+struct inode *find_inode_rcu(struct super_block *sb, u64 hashval,
+			     int (*test)(struct inode *, void *), void *data);
+struct inode *find_inode_by_ino_rcu(struct super_block *sb, u64 ino);
+int insert_inode_locked4(struct inode *inode, u64 hashval,
+			 int (*test)(struct inode *, void *), void *data);
+int insert_inode_locked(struct inode *inode);
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
-extern void lockdep_annotate_inode_mutex_key(struct inode *inode);
+void lockdep_annotate_inode_mutex_key(struct inode *inode);
 #else
 static inline void lockdep_annotate_inode_mutex_key(struct inode *inode) { };
 #endif
-extern void unlock_new_inode(struct inode *);
-extern void discard_new_inode(struct inode *);
-extern unsigned int get_next_ino(void);
-extern void evict_inodes(struct super_block *sb);
+void unlock_new_inode(struct inode *inode);
+void discard_new_inode(struct inode *inode);
+unsigned int get_next_ino(void);
+void evict_inodes(struct super_block *sb);
 void dump_mapping(const struct address_space *);
 
 /*
@@ -3015,21 +3013,21 @@ int setattr_should_drop_sgid(struct mnt_idmap *idmap,
  */
 #define alloc_inode_sb(_sb, _cache, _gfp) kmem_cache_alloc_lru(_cache, &_sb->s_inode_lru, _gfp)
 
-extern void __insert_inode_hash(struct inode *, unsigned long hashval);
+void __insert_inode_hash(struct inode *inode, u64 hashval);
 static inline void insert_inode_hash(struct inode *inode)
 {
 	__insert_inode_hash(inode, inode->i_ino);
 }
 
-extern void __remove_inode_hash(struct inode *);
+void __remove_inode_hash(struct inode *inode);
 static inline void remove_inode_hash(struct inode *inode)
 {
 	if (!inode_unhashed(inode) && !hlist_fake(&inode->i_hash))
 		__remove_inode_hash(inode);
 }
 
-extern void inode_sb_list_add(struct inode *inode);
-extern void inode_lru_list_add(struct inode *inode);
+void inode_sb_list_add(struct inode *inode);
+void inode_lru_list_add(struct inode *inode);
 
 int generic_file_mmap(struct file *, struct vm_area_struct *);
 int generic_file_mmap_prepare(struct vm_area_desc *desc);