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NFSD: Add POSIX ACL file attributes to SUPPATTR bitmasks

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Now that infrastructure for NFSv4 POSIX draft ACL has been added
to NFSD, it should be safe to advertise support to NFS clients.

NFSD_SUPPATTR_EXCLCREAT_WORD2 includes NFSv4.2-only attributes,
but version filtering occurs via nfsd_suppattrs[] before this
mask is applied, ensuring pre-4.2 clients never see unsupported
attributes.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2026-01-09 11:21:42 -05:00
parent 318579c093
commit e939bd6756
1 changed files with 23 additions and 1 deletions
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24
fs/nfsd/nfsd.h
View file

@ -454,6 +454,16 @@ enum {
#define NFSD4_2_SECURITY_ATTRS 0
#endif
#ifdef CONFIG_NFSD_V4_POSIX_ACLS
#define NFSD4_2_POSIX_ACL_ATTRS \
(FATTR4_WORD2_ACL_TRUEFORM | \
FATTR4_WORD2_ACL_TRUEFORM_SCOPE | \
FATTR4_WORD2_POSIX_DEFAULT_ACL | \
FATTR4_WORD2_POSIX_ACCESS_ACL)
#else
#define NFSD4_2_POSIX_ACL_ATTRS 0
#endif
#define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
(NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
FATTR4_WORD2_MODE_UMASK | \
@ -462,7 +472,8 @@ enum {
FATTR4_WORD2_XATTR_SUPPORT | \
FATTR4_WORD2_TIME_DELEG_ACCESS | \
FATTR4_WORD2_TIME_DELEG_MODIFY | \
FATTR4_WORD2_OPEN_ARGUMENTS)
FATTR4_WORD2_OPEN_ARGUMENTS | \
NFSD4_2_POSIX_ACL_ATTRS)
extern const u32 nfsd_suppattrs[3][3];
@ -530,11 +541,18 @@ static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
#else
#define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
#endif
#ifdef CONFIG_NFSD_V4_POSIX_ACLS
#define MAYBE_FATTR4_WORD2_POSIX_ACL_ATTRS \
FATTR4_WORD2_POSIX_DEFAULT_ACL | FATTR4_WORD2_POSIX_ACCESS_ACL
#else
#define MAYBE_FATTR4_WORD2_POSIX_ACL_ATTRS 0
#endif
#define NFSD_WRITEABLE_ATTRS_WORD2 \
(FATTR4_WORD2_MODE_UMASK \
| MAYBE_FATTR4_WORD2_SECURITY_LABEL \
| FATTR4_WORD2_TIME_DELEG_ACCESS \
| FATTR4_WORD2_TIME_DELEG_MODIFY \
| MAYBE_FATTR4_WORD2_POSIX_ACL_ATTRS \
)
#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
@ -550,6 +568,10 @@ static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
* The FATTR4_WORD2_TIME_DELEG attributes are not to be allowed for
* OPEN(create) with EXCLUSIVE4_1. It doesn't make sense to set a
* delegated timestamp on a new file.
*
* This mask includes NFSv4.2-only attributes (e.g., POSIX ACLs).
* Version filtering occurs via nfsd_suppattrs[] before this mask
* is applied, so pre-4.2 clients never see unsupported attributes.
*/
#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
(NFSD_WRITEABLE_ATTRS_WORD2 & \