Linux 6.3 compat: idmapped mount API changes

Linux kernel 6.3 changed a bunch of APIs to use the dedicated idmap
type for mounts (struct mnt_idmap), we need to detect these changes
and make zfs work with the new APIs.

NOTE: This backport only includes the configure checks to detect
the 6.3 idmap API changes.  It does not include support for idmap.
When provided the idmap variable is ignored in most case in the
same way the user_ns argument was ignored.  This change is solely
to provide compatibility with the new interfaces.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Youzhong Yang <yyang@mathworks.com>
Closes #14682
This commit is contained in:
youzhongyang
2023-04-10 17:15:36 -04:00
committed by Tony Hutter
parent 04305bbd18
commit f0aca5f7bb
28 changed files with 708 additions and 166 deletions
+12
View File
@@ -145,6 +145,18 @@ crgetgid(const cred_t *cr)
return (KGID_TO_SGID(cr->fsgid));
}
/* Return the initial user ns or nop_mnt_idmap */
zidmap_t *
zfs_get_init_idmap(void)
{
#ifdef HAVE_IOPS_CREATE_IDMAP
return ((zidmap_t *)&nop_mnt_idmap);
#else
return ((zidmap_t *)&init_user_ns);
#endif
}
EXPORT_SYMBOL(zfs_get_init_idmap);
EXPORT_SYMBOL(crhold);
EXPORT_SYMBOL(crfree);
EXPORT_SYMBOL(crgetuid);