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Date: Fri, 23 Oct 2015 20:41:53 +0200
From: Andreas Gruenbacher <agruenba@...hat.com>
To: Alexander Viro <viro@...iv.linux.org.uk>,
"Theodore Ts'o" <tytso@....edu>,
Andreas Dilger <adilger.kernel@...ger.ca>,
"J. Bruce Fields" <bfields@...ldses.org>,
Jeff Layton <jlayton@...chiereds.net>,
Trond Myklebust <trond.myklebust@...marydata.com>,
Anna Schumaker <anna.schumaker@...app.com>,
Dave Chinner <david@...morbit.com>, linux-ext4@...r.kernel.org,
xfs@....sgi.com, linux-kernel@...r.kernel.org,
linux-fsdevel@...r.kernel.org, linux-nfs@...r.kernel.org,
linux-cifs@...r.kernel.org, linux-api@...r.kernel.org
Cc: Andreas Gruenbacher <agruenba@...hat.com>
Subject: [PATCH v12 40/49] nfsd: Add support for unmapped richace identifiers
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@...hat.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
--
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