On Thu, Jun 27, 2024 at 01:05:38PM GMT, John Garry wrote: > On 20/06/2024 14:00, John Garry wrote: Hi John, > Hi Alex, > > Is there anything else required to get this picked up? > > I have some more dependent changes waiting. No; I'll try to review it tonight or tomorrow. Thanks for the ping! I'm doing many things these days, and forgot about this patch. Have a lovely day! Alex > > Thanks > > > From: Kent Overstreet <kent.overstreet@xxxxxxxxx> > > > > Document the new statx.stx_subvol field. > > > > This would be clearer if we had a proper API for walking subvolumes that > > we could refer to, but that's still coming. > > > > Link: https://lore.kernel.org/linux-fsdevel/20240308022914.196982-1-kent.overstreet@xxxxxxxxx/ > > Signed-off-by: Kent Overstreet <kent.overstreet@xxxxxxxxx> > > [jpg: mention supported FSes and formatting improvements] > > Signed-off-by: John Garry <john.g.garry@xxxxxxxxxx> > > --- > > I am just sending a new version as I want to post more statx updates > > which are newer than stx_subvol. > > diff --git a/man/man2/statx.2 b/man/man2/statx.2 > > index 0dcf7e20b..5b17d9afe 100644 > > --- a/man/man2/statx.2 > > +++ b/man/man2/statx.2 > > @@ -68,6 +68,8 @@ struct statx { > > /* Direct I/O alignment restrictions */ > > __u32 stx_dio_mem_align; > > __u32 stx_dio_offset_align; > > +\& > > + __u64 stx_subvol; /* Subvolume identifier */ > > }; > > .EE > > .in > > @@ -255,6 +257,8 @@ STATX_ALL The same as STATX_BASIC_STATS | STATX_BTIME. > > STATX_MNT_ID Want stx_mnt_id (since Linux 5.8) > > STATX_DIOALIGN Want stx_dio_mem_align and stx_dio_offset_align > > (since Linux 6.1; support varies by filesystem) > > +STATX_SUBVOL Want stx_subvol > > + (since Linux 6.10; support varies by filesystem) > > .TE > > .in > > .P > > @@ -439,6 +443,14 @@ or 0 if direct I/O is not supported on this file. > > This will only be nonzero if > > .I stx_dio_mem_align > > is nonzero, and vice versa. > > +.TP > > +.I stx_subvol > > +Subvolume number of the current file. > > +.IP > > +Subvolumes are fancy directories, > > +i.e. they form a tree structure that may be walked recursively. > > +Support varies by filesystem; > > +it is supported by bcachefs and btrfs since Linux 6.10. > > .P > > For further information on the above fields, see > > .BR inode (7). > -- <https://www.alejandro-colomar.es/>
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