[PATCH v11 39/48] nfsd: Add support for unmapped richace identifiers
From: Andreas Gruenbacher <agruenba@redhat.com>
Date: 2015-10-16 15:18:17
Also in:
linux-api, linux-cifs, linux-fsdevel, linux-nfs, linux-xfs, lkml
Subsystem:
filesystems (vfs and infrastructure), kernel nfsd, sunrpc, and lockd servers, the rest · Maintainers:
Alexander Viro, Christian Brauner, Chuck Lever, Jeff Layton, Linus Torvalds
Add support for encoding unmapped identifiers in richacl entries: local filesystems are not usually supposed to store unmapped identifiers, but allowing that for debugging purposes can be useful; for that, nfsd must also be able to encode them. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> --- fs/nfsd/acl.h | 2 +- fs/nfsd/nfs4acl.c | 17 +++++++++++------ fs/nfsd/nfs4xdr.c | 4 ++-- 3 files changed, 14 insertions(+), 9 deletions(-)
diff --git a/fs/nfsd/acl.h b/fs/nfsd/acl.h
index d73c664..4935144 100644
--- a/fs/nfsd/acl.h
+++ b/fs/nfsd/acl.h@@ -51,7 +51,7 @@ struct svc_rqst; __be32 nfsd4_decode_ace_who(struct richace *ace, struct svc_rqst *rqstp, char *who, u32 len); __be32 nfsd4_encode_ace_who(struct xdr_stream *xdr, struct svc_rqst *rqstp, - struct richace *ace); + struct richace *ace, struct richacl *acl); struct richacl *nfsd4_get_acl(struct svc_rqst *rqstp, struct dentry *dentry); __be32 nfsd4_set_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
diff --git a/fs/nfsd/nfs4acl.c b/fs/nfsd/nfs4acl.c
index f017a76..3cc83fd 100644
--- a/fs/nfsd/nfs4acl.c
+++ b/fs/nfsd/nfs4acl.c@@ -885,17 +885,22 @@ __be32 nfsd4_decode_ace_who(struct richace *ace, struct svc_rqst *rqstp, } __be32 nfsd4_encode_ace_who(struct xdr_stream *xdr, struct svc_rqst *rqstp, - struct richace *ace) + struct richace *ace, struct richacl *acl) { - if (ace->e_flags & RICHACE_SPECIAL_WHO) { - unsigned int special_id = ace->e_id.special; + if (ace->e_flags & (RICHACE_SPECIAL_WHO | RICHACE_UNMAPPED_WHO)) { const char *who; unsigned int len; __be32 *p; - if (!nfs4acl_special_id_to_who(special_id, &who, &len)) { - WARN_ON_ONCE(1); - return nfserr_serverfault; + if (ace->e_flags & RICHACE_SPECIAL_WHO) { + if (!nfs4acl_special_id_to_who(ace->e_id.special, + &who, &len)) { + WARN_ON_ONCE(1); + return nfserr_serverfault; + } + } else { + who = richace_unmapped_identifier(ace, acl); + len = strlen(who); } p = xdr_reserve_space(xdr, len + 4); if (!p)
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 33d028c..8728d0e 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c@@ -2325,7 +2325,7 @@ static __be32 nfsd4_encode_acl_entries(struct xdr_stream *xdr, { __be32 *p; - flags_mask &= ~RICHACE_SPECIAL_WHO; + flags_mask &= ~(RICHACE_SPECIAL_WHO | RICHACE_UNMAPPED_WHO); p = xdr_reserve_space(xdr, 4); if (!p)
@@ -2347,7 +2347,7 @@ static __be32 nfsd4_encode_acl_entries(struct xdr_stream *xdr, *p++ = cpu_to_be32(ace->e_type); *p++ = cpu_to_be32(ace->e_flags & flags_mask); *p++ = cpu_to_be32(ace->e_mask & ace_mask); - status = nfsd4_encode_ace_who(xdr, rqstp, ace); + status = nfsd4_encode_ace_who(xdr, rqstp, ace, acl); if (status) return status; }
--
2.5.0