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Linux 6.3 compat: idmapped mount API changes

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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
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include/os/linux/spl/sys/cred.h
+2
View File
@@ -45,6 +45,8 @@ typedef struct cred cred_t;
#define SGID_TO_KGID(x) (KGIDT_INIT(x))
#define KGIDP_TO_SGIDP(x) (&(x)->val)
extern zidmap_t *zfs_get_init_idmap(void);
extern void crhold(cred_t *cr);
extern void crfree(cred_t *cr);
extern uid_t crgetuid(const cred_t *cr);
include/os/linux/spl/sys/types.h
+14
View File
@@ -54,4 +54,18 @@ typedef ulong_t pgcnt_t;
typedef int major_t;
typedef int minor_t;
struct user_namespace;
#ifdef HAVE_IOPS_CREATE_IDMAP
#include <linux/refcount.h>
struct mnt_idmap {
struct user_namespace *owner;
refcount_t count;
};
typedef struct mnt_idmap zidmap_t;
#else
typedef struct user_namespace zidmap_t;
#endif
extern zidmap_t *zfs_init_idmap;
#endif /* _SPL_TYPES_H */