Re: [PATCH v2 007/110] ext4: use PRIino format for i_ino

Jan Kara <[email protected]> Tue, 3 Mar 2026 12:20:54 +0100
Newsgroups gmane.linux.file-systems.f2fs,gmane.comp.video.dri.devel,gmane.linux.hams,gmane.comp.file-systems.ceph.devel,gmane.linux.kernel,gmane.linux.kernel.perf.user,gmane.linux.drivers.video-input-infrastructure,gmane.linux.kernel.cifs,gmane.comp.file-systems.nilfs.user,gmane.comp.file-systems.coda.general,gmane.linux.can,gmane.linux.drivers.mtd,gmane.comp.freedesktop.amd-gfx,gmane.linux.kernel.autofs,gmane.linux.nfs,gmane.comp.file-systems.ext4,gmane.linux.kernel.mm,gmane.network.samba.internals,gmane.linux.network,gmane.linux.file-systems,gmane.linux.kernel.bpf,gmane.comp.file-systems.ecryptfs.general,gmane.linux.file-systems.union,gmane.linux.x25,gmane.linux.bluez.kernel,gmane.comp.security.apparmor,gmane.linux.kernel.lsm
Message-ID <eb56qw5rblcnlqupj5lftynq2vts2idha54xpegrfgx45znfuz@mdjzriuawmfn> 
On Mon 02-03-26 15:23:51, Jeff Layton wrote:
> Convert ext4 i_ino format strings to use the PRIino format
> macro in preparation for the widening of i_ino via kino_t.
> 
> In trace events, change __field(ino_t, ...) to __field(u64, ...)
> and update TP_printk format strings to %llu/%llx to match the
> widened field type.
> 
> Update local variables and function parameters that hold i_ino
> values from unsigned long to kino_t.
> 
> Signed-off-by: Jeff Layton <[email protected]>

Two small comments. Otherwise feel free to add:

Reviewed-by: Jan Kara <[email protected]>

> diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
> index 96ab95167bd6e10ba86e61a60cb0be9fbafe157f..43103816b80ef4901858bcd789acb0ffb2612317 100644
> --- a/fs/ext4/migrate.c
> +++ b/fs/ext4/migrate.c
> @@ -455,7 +455,7 @@ int ext4_ext_migrate(struct inode *inode)
>  	 * log, so disable fast commits for this transaction.
>  	 */
>  	ext4_fc_mark_ineligible(inode->i_sb, EXT4_FC_REASON_MIGRATE, handle);
> -	goal = (((inode->i_ino - 1) / EXT4_INODES_PER_GROUP(inode->i_sb)) *
> +	goal = (div_u64(inode->i_ino - 1, EXT4_INODES_PER_GROUP(inode->i_sb)) *

Ext4 doesn't support more than 2^32 inodes (due to on-disk format). Thus
i_ino is always guaranteed to be a number that fits in 32-bits. Thus I'd
here just type i_ino to (unsigned int) and be done with it like you've done
it at other places.

...

> @@ -1823,7 +1823,7 @@ TRACE_EVENT(ext4_journal_start_inode,
>  	TP_ARGS(inode, blocks, rsv_blocks, revoke_creds, type, IP),
>  
>  	TP_STRUCT__entry(
> -		__field(	unsigned long,	ino		)
> +		__field(	u64,		ino		)
>  		__field(	dev_t,		dev		)
>  		__field(	unsigned long,	ip		)
>  		__field(	int,		blocks		)
> @@ -1843,9 +1843,10 @@ TRACE_EVENT(ext4_journal_start_inode,
>  	),
>  
>  	TP_printk("dev %d,%d blocks %d, rsv_blocks %d, revoke_creds %d,"
> -		  " type %d, ino %lu, caller %pS", MAJOR(__entry->dev),
> +		  " type %d, ino %llu, caller %pS", MAJOR(__entry->dev),
>  		  MINOR(__entry->dev), __entry->blocks, __entry->rsv_blocks,
> -		  __entry->revoke_creds, __entry->type, __entry->ino,
> +		  __entry->revoke_creds, __entry->type,
> +		  (unsigned long long) __entry->ino,

Not point in the type cast?

								Honza
-- 
Jan Kara <[email protected]>
SUSE Labs, CR