Refactor for clarity and to move infrequently-used code out of line.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
fs/nfsd/nfs4xdr.c | 107 +++++++++++++++++++++++++++++++++--------------------
1 file changed, 67 insertions(+), 40 deletions(-)
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 9f121698aa92..54c553ef35bf 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -243,6 +243,70 @@ nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
DECODE_TAIL;
}
+static __be32
+nfsd4_decode_nfsace4(struct nfsd4_compoundargs *argp, struct nfs4_ace *ace)
+{
+ __be32 *p, status;
+ u32 length;
+
+ if (xdr_stream_decode_u32(argp->xdr, &ace->type) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &ace->flag) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &ace->access_mask) < 0)
+ return nfserr_bad_xdr;
+
+ if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
+ return nfserr_bad_xdr;
+ p = xdr_inline_decode(argp->xdr, length);
+ if (!p)
+ return nfserr_bad_xdr;
+ ace->whotype = nfs4_acl_get_whotype((char *)p, length);
+ if (ace->whotype != NFS4_ACL_WHO_NAMED)
+ status = nfs_ok;
+ else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
+ status = nfsd_map_name_to_gid(argp->rqstp,
+ (char *)p, length, &ace->who_gid);
+ else
+ status = nfsd_map_name_to_uid(argp->rqstp,
+ (char *)p, length, &ace->who_uid);
+
+ return status;
+}
+
+/* A counted array of nfsace4's */
+static noinline __be32
+nfsd4_decode_acl(struct nfsd4_compoundargs *argp, struct nfs4_acl **acl)
+{
+ struct nfs4_ace *ace;
+ __be32 status;
+ u32 count;
+
+ if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
+ return nfserr_bad_xdr;
+
+ if (count > xdr_stream_remaining(argp->xdr) / sizeof(struct nfs4_ace))
+ /*
+ * Even with 4-byte names there wouldn't be
+ * space for that many aces; something fishy is
+ * going on:
+ */
+ return nfserr_fbig;
+
+ *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(count));
+ if (*acl == NULL)
+ return nfserr_jukebox;
+
+ (*acl)->naces = count;
+ for (ace = (*acl)->aces; ace < (*acl)->aces + count; ace++) {
+ status = nfsd4_decode_nfsace4(argp, ace);
+ if (status)
+ return status;
+ }
+
+ return nfs_ok;
+}
+
static __be32
nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
struct iattr *iattr, struct nfs4_acl **acl,
@@ -279,46 +343,9 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
iattr->ia_valid |= ATTR_SIZE;
}
if (bmval[0] & FATTR4_WORD0_ACL) {
- u32 nace;
- struct nfs4_ace *ace;
-
- READ_BUF(4);
- nace = be32_to_cpup(p++);
-
- if (nace > xdr_stream_remaining(argp->xdr) / sizeof(struct nfs4_ace))
- /*
- * Even with 4-byte names there wouldn't be
- * space for that many aces; something fishy is
- * going on:
- */
- return nfserr_fbig;
-
- *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
- if (*acl == NULL)
- return nfserr_jukebox;
-
- (*acl)->naces = nace;
- for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
- READ_BUF(16);
- ace->type = be32_to_cpup(p++);
- ace->flag = be32_to_cpup(p++);
- ace->access_mask = be32_to_cpup(p++);
- dummy32 = be32_to_cpup(p++);
- READ_BUF(dummy32);
- READMEM(buf, dummy32);
- ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
- status = nfs_ok;
- if (ace->whotype != NFS4_ACL_WHO_NAMED)
- ;
- else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
- status = nfsd_map_name_to_gid(argp->rqstp,
- buf, dummy32, &ace->who_gid);
- else
- status = nfsd_map_name_to_uid(argp->rqstp,
- buf, dummy32, &ace->who_uid);
- if (status)
- return status;
- }
+ status = nfsd4_decode_acl(argp, acl);
+ if (status)
+ return status;
} else
*acl = NULL;
if (bmval[1] & FATTR4_WORD1_MODE) {
