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Diffstat (limited to 'fs/nfsd/nfs4xdr.c')
-rw-r--r--fs/nfsd/nfs4xdr.c178
1 files changed, 62 insertions, 116 deletions
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index ee7237f99f54..63f2395c57ed 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -103,11 +103,6 @@ xdr_error: \
(x) = (u64)ntohl(*p++) << 32; \
(x) |= ntohl(*p++); \
} while (0)
-#define READTIME(x) do { \
- p++; \
- (x) = ntohl(*p++); \
- p++; \
-} while (0)
#define READMEM(x,nbytes) do { \
x = (char *)p; \
p += XDR_QUADLEN(nbytes); \
@@ -190,6 +185,15 @@ static int zero_clientid(clientid_t *clid)
return (clid->cl_boot == 0) && (clid->cl_id == 0);
}
+/**
+ * defer_free - mark an allocation as deferred freed
+ * @argp: NFSv4 compound argument structure to be freed with
+ * @release: release callback to free @p, typically kfree()
+ * @p: pointer to be freed
+ *
+ * Marks @p to be freed when processing the compound operation
+ * described in @argp finishes.
+ */
static int
defer_free(struct nfsd4_compoundargs *argp,
void (*release)(const void *), void *p)
@@ -206,6 +210,16 @@ defer_free(struct nfsd4_compoundargs *argp,
return 0;
}
+/**
+ * savemem - duplicate a chunk of memory for later processing
+ * @argp: NFSv4 compound argument structure to be freed with
+ * @p: pointer to be duplicated
+ * @nbytes: length to be duplicated
+ *
+ * Returns a pointer to a copy of @nbytes bytes of memory at @p
+ * that are preserved until processing of the NFSv4 compound
+ * operation described by @argp finishes.
+ */
static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
{
if (p == argp->tmp) {
@@ -257,7 +271,6 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
int expected_len, len = 0;
u32 dummy32;
char *buf;
- int host_err;
DECODE_HEAD;
iattr->ia_valid = 0;
@@ -284,10 +297,9 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
return nfserr_resource;
*acl = nfs4_acl_new(nace);
- if (*acl == NULL) {
- host_err = -ENOMEM;
- goto out_nfserr;
- }
+ if (*acl == NULL)
+ return nfserr_jukebox;
+
defer_free(argp, kfree, *acl);
(*acl)->naces = nace;
@@ -425,10 +437,6 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
goto xdr_error;
DECODE_TAIL;
-
-out_nfserr:
- status = nfserrno(host_err);
- goto out;
}
static __be32
@@ -1957,56 +1965,16 @@ static u32 nfs4_file_type(umode_t mode)
};
}
-static __be32
-nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, kuid_t uid, kgid_t gid,
- __be32 **p, int *buflen)
-{
- int status;
-
- if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
- return nfserr_resource;
- if (whotype != NFS4_ACL_WHO_NAMED)
- status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
- else if (gid_valid(gid))
- status = nfsd_map_gid_to_name(rqstp, gid, (u8 *)(*p + 1));
- else
- status = nfsd_map_uid_to_name(rqstp, uid, (u8 *)(*p + 1));
- if (status < 0)
- return nfserrno(status);
- *p = xdr_encode_opaque(*p, NULL, status);
- *buflen -= (XDR_QUADLEN(status) << 2) + 4;
- BUG_ON(*buflen < 0);
- return 0;
-}
-
-static inline __be32
-nfsd4_encode_user(struct svc_rqst *rqstp, kuid_t user, __be32 **p, int *buflen)
-{
- return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, user, INVALID_GID,
- p, buflen);
-}
-
-static inline __be32
-nfsd4_encode_group(struct svc_rqst *rqstp, kgid_t group, __be32 **p, int *buflen)
-{
- return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, INVALID_UID, group,
- p, buflen);
-}
-
static inline __be32
nfsd4_encode_aclname(struct svc_rqst *rqstp, struct nfs4_ace *ace,
__be32 **p, int *buflen)
{
- kuid_t uid = INVALID_UID;
- kgid_t gid = INVALID_GID;
-
- if (ace->whotype == NFS4_ACL_WHO_NAMED) {
- if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
- gid = ace->who_gid;
- else
- uid = ace->who_uid;
- }
- return nfsd4_encode_name(rqstp, ace->whotype, uid, gid, p, buflen);
+ if (ace->whotype != NFS4_ACL_WHO_NAMED)
+ return nfs4_acl_write_who(ace->whotype, p, buflen);
+ else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
+ return nfsd4_encode_group(rqstp, ace->who_gid, p, buflen);
+ else
+ return nfsd4_encode_user(rqstp, ace->who_uid, p, buflen);
}
#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
@@ -2090,7 +2058,7 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
u32 bmval1 = bmval[1];
u32 bmval2 = bmval[2];
struct kstat stat;
- struct svc_fh tempfh;
+ struct svc_fh *tempfh = NULL;
struct kstatfs statfs;
int buflen = count << 2;
__be32 *attrlenp;
@@ -2137,11 +2105,15 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
goto out_nfserr;
}
if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
- fh_init(&tempfh, NFS4_FHSIZE);
- status = fh_compose(&tempfh, exp, dentry, NULL);
+ tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
+ status = nfserr_jukebox;
+ if (!tempfh)
+ goto out;
+ fh_init(tempfh, NFS4_FHSIZE);
+ status = fh_compose(tempfh, exp, dentry, NULL);
if (status)
goto out;
- fhp = &tempfh;
+ fhp = tempfh;
}
if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
| FATTR4_WORD0_SUPPORTED_ATTRS)) {
@@ -2222,8 +2194,10 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
if ((buflen -= 4) < 0)
goto out_resource;
dummy = nfs4_file_type(stat.mode);
- if (dummy == NF4BAD)
- goto out_serverfault;
+ if (dummy == NF4BAD) {
+ status = nfserr_serverfault;
+ goto out;
+ }
WRITE32(dummy);
}
if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
@@ -2317,8 +2291,6 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
WRITE32(ace->flag);
WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
status = nfsd4_encode_aclname(rqstp, ace, &p, &buflen);
- if (status == nfserr_resource)
- goto out_resource;
if (status)
goto out;
}
@@ -2379,8 +2351,6 @@ out_acl:
}
if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
- if (status == nfserr_resource)
- goto out_resource;
if (status)
goto out;
}
@@ -2431,15 +2401,11 @@ out_acl:
}
if (bmval1 & FATTR4_WORD1_OWNER) {
status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
- if (status == nfserr_resource)
- goto out_resource;
if (status)
goto out;
}
if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
- if (status == nfserr_resource)
- goto out_resource;
if (status)
goto out;
}
@@ -2533,8 +2499,8 @@ out:
security_release_secctx(context, contextlen);
#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
kfree(acl);
- if (fhp == &tempfh)
- fh_put(&tempfh);
+ if (tempfh)
+ fh_put(tempfh);
return status;
out_nfserr:
status = nfserrno(err);
@@ -2542,9 +2508,6 @@ out_nfserr:
out_resource:
status = nfserr_resource;
goto out;
-out_serverfault:
- status = nfserr_serverfault;
- goto out;
}
static inline int attributes_need_mount(u32 *bmval)
@@ -2621,17 +2584,14 @@ out_put:
static __be32 *
nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
{
- __be32 *attrlenp;
-
if (buflen < 6)
return NULL;
*p++ = htonl(2);
*p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
*p++ = htonl(0); /* bmval1 */
- attrlenp = p++;
+ *p++ = htonl(4); /* attribute length */
*p++ = nfserr; /* no htonl */
- *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
return p;
}
@@ -3244,7 +3204,7 @@ nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
if (rpcauth_get_gssinfo(pf, &info) == 0) {
supported++;
- RESERVE_SPACE(4 + 4 + info.oid.len + 4 + 4);
+ RESERVE_SPACE(4 + 4 + XDR_LEN(info.oid.len) + 4 + 4);
WRITE32(RPC_AUTH_GSS);
WRITE32(info.oid.len);
WRITEMEM(info.oid.data, info.oid.len);
@@ -3379,35 +3339,43 @@ nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
8 /* eir_clientid */ +
4 /* eir_sequenceid */ +
4 /* eir_flags */ +
- 4 /* spr_how */ +
- 8 /* spo_must_enforce, spo_must_allow */ +
- 8 /* so_minor_id */ +
- 4 /* so_major_id.len */ +
- (XDR_QUADLEN(major_id_sz) * 4) +
- 4 /* eir_server_scope.len */ +
- (XDR_QUADLEN(server_scope_sz) * 4) +
- 4 /* eir_server_impl_id.count (0) */);
+ 4 /* spr_how */);
WRITEMEM(&exid->clientid, 8);
WRITE32(exid->seqid);
WRITE32(exid->flags);
WRITE32(exid->spa_how);
+ ADJUST_ARGS();
+
switch (exid->spa_how) {
case SP4_NONE:
break;
case SP4_MACH_CRED:
+ /* spo_must_enforce, spo_must_allow */
+ RESERVE_SPACE(16);
+
/* spo_must_enforce bitmap: */
WRITE32(2);
WRITE32(nfs4_minimal_spo_must_enforce[0]);
WRITE32(nfs4_minimal_spo_must_enforce[1]);
/* empty spo_must_allow bitmap: */
WRITE32(0);
+
+ ADJUST_ARGS();
break;
default:
WARN_ON_ONCE(1);
}
+ RESERVE_SPACE(
+ 8 /* so_minor_id */ +
+ 4 /* so_major_id.len */ +
+ (XDR_QUADLEN(major_id_sz) * 4) +
+ 4 /* eir_server_scope.len */ +
+ (XDR_QUADLEN(server_scope_sz) * 4) +
+ 4 /* eir_server_impl_id.count (0) */);
+
/* The server_owner struct */
WRITE64(minor_id); /* Minor id */
/* major id */
@@ -3474,28 +3442,6 @@ nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
}
static __be32
-nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_destroy_session *destroy_session)
-{
- return nfserr;
-}
-
-static __be32
-nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_free_stateid *free_stateid)
-{
- __be32 *p;
-
- if (nfserr)
- return nfserr;
-
- RESERVE_SPACE(4);
- *p++ = nfserr;
- ADJUST_ARGS();
- return nfserr;
-}
-
-static __be32
nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
struct nfsd4_sequence *seq)
{
@@ -3593,8 +3539,8 @@ static nfsd4_enc nfsd4_enc_ops[] = {
[OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
[OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
[OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
- [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
- [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid,
+ [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
[OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
[OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
[OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.