treewide: change inode->i_ino from unsigned long to u64

On 32-bit architectures, unsigned long is only 32 bits wide, which
causes 64-bit inode numbers to be silently truncated. Several
filesystems (NFS, XFS, BTRFS, etc.) can generate inode numbers that
exceed 32 bits, and this truncation can lead to inode number collisions
and other subtle bugs on 32-bit systems.

Change the type of inode->i_ino from unsigned long to u64 to ensure that
inode numbers are always represented as 64-bit values regardless of
architecture. Update all format specifiers treewide from %lu/%lx to
%llu/%llx to match the new type, along with corresponding local variable
types.

This is the bulk treewide conversion. Earlier patches in this series
handled trace events separately to allow trace field reordering for
better struct packing on 32-bit.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Link: https://patch.msgid.link/20260304-iino-u64-v3-12-2257ad83d372@kernel.org
Acked-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>

1 files changed, 6 insertions, 7 deletions

diff --git a/fs/inode.c b/fs/inode.c
index 62df5dda0589..5ad169d51728 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -726,7 +726,7 @@ void dump_mapping(const struct address_space *mapping)
 	struct dentry *dentry_ptr;
 	struct dentry dentry;
 	char fname[64] = {};
-	unsigned long ino;
+	u64 ino;
 
 	/*
 	 * If mapping is an invalid pointer, we don't want to crash
@@ -750,14 +750,14 @@ void dump_mapping(const struct address_space *mapping)
 	}
 
 	if (!dentry_first) {
-		pr_warn("aops:%ps ino:%lx\n", a_ops, ino);
+		pr_warn("aops:%ps ino:%llx\n", a_ops, ino);
 		return;
 	}
 
 	dentry_ptr = container_of(dentry_first, struct dentry, d_u.d_alias);
 	if (get_kernel_nofault(dentry, dentry_ptr) ||
 	    !dentry.d_parent || !dentry.d_name.name) {
-		pr_warn("aops:%ps ino:%lx invalid dentry:%px\n",
+		pr_warn("aops:%ps ino:%llx invalid dentry:%px\n",
 				a_ops, ino, dentry_ptr);
 		return;
 	}
@@ -768,7 +768,7 @@ void dump_mapping(const struct address_space *mapping)
 	 * Even if strncpy_from_kernel_nofault() succeeded,
 	 * the fname could be unreliable
 	 */
-	pr_warn("aops:%ps ino:%lx dentry name(?):\"%s\"\n",
+	pr_warn("aops:%ps ino:%llx dentry name(?):\"%s\"\n",
 		a_ops, ino, fname);
 }
 
@@ -2641,9 +2641,8 @@ void init_special_inode(struct inode *inode, umode_t mode, dev_t rdev)
 		/* leave it no_open_fops */
 		break;
 	default:
-		printk(KERN_DEBUG "init_special_inode: bogus i_mode (%o) for"
-				  " inode %s:%lu\n", mode, inode->i_sb->s_id,
-				  inode->i_ino);
+		pr_debug("init_special_inode: bogus i_mode (%o) for inode %s:%llu\n",
+			 mode, inode->i_sb->s_id, inode->i_ino);
 		break;
 	}
 }