vfs: widen inode hash/lookup functions to u64

Change the inode hash/lookup VFS API functions to accept u64 parameters
instead of unsigned long for inode numbers and hash values. This is
preparation for widening i_ino itself to u64, which will allow
filesystems to store full 64-bit inode numbers on 32-bit architectures.

Since unsigned long implicitly widens to u64 on all architectures, this
change is backward-compatible with all existing callers.

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Link: https://patch.msgid.link/20260304-iino-u64-v3-1-2257ad83d372@kernel.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>

1 files changed, 22 insertions, 24 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 8b3dd145b25e..b4f5e5fdbe4b 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2934,33 +2934,31 @@ static inline int inode_generic_drop(struct inode *inode)
 }
 extern 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);
-
-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 *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);
+
+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 *, u64,
 			   int (*test)(struct inode *, void *),
 			   int (*set)(struct inode *, void *), void *);
-struct inode *iget5_locked_rcu(struct super_block *, unsigned long,
+struct inode *iget5_locked_rcu(struct super_block *, u64,
 			       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 *);
+struct inode *iget_locked(struct super_block *, u64);
+struct inode *find_inode_nowait(struct super_block *, u64,
+				int (*match)(struct inode *, u64, void *),
+				void *data);
+struct inode *find_inode_rcu(struct super_block *, u64,
+			     int (*)(struct inode *, void *), void *);
+struct inode *find_inode_by_ino_rcu(struct super_block *, u64);
+int insert_inode_locked4(struct inode *, u64,
+			 int (*test)(struct inode *, void *), void *);
 extern int insert_inode_locked(struct inode *);
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 extern void lockdep_annotate_inode_mutex_key(struct inode *inode);
@@ -3015,7 +3013,7 @@ 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 *, u64 hashval);
 static inline void insert_inode_hash(struct inode *inode)
 {
 	__insert_inode_hash(inode, inode->i_ino);