nfs: return negative error value from nfs{,4}_stat_to_errno

All use sites for nfs{,4}_stat_to_errno negate their return value.
It's more efficient to return a negative error from the stat_to_errno convertors
rather than negating its return value everywhere. This also produces slightly
smaller code.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

3 files changed, 95 insertions, 95 deletions

diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c
index 86a80b33ec82..28bab67d1519 100644
--- a/fs/nfs/nfs2xdr.c
+++ b/fs/nfs/nfs2xdr.c
@@ -267,7 +267,7 @@ nfs_xdr_readres(struct rpc_rqst *req, __be32 *p, struct nfs_readres *res)
         int status;
 
         if ((status = ntohl(*p++)))
-                return -nfs_stat_to_errno(status);
+                return nfs_stat_to_errno(status);
         p = xdr_decode_fattr(p, res->fattr);
 
         count = ntohl(*p++);
@@ -432,7 +432,7 @@ nfs_xdr_readdirres(struct rpc_rqst *req, __be32 *p, void *dummy)
         __be32 *end, *entry, *kaddr;
 
         if ((status = ntohl(*p++)))
-                return -nfs_stat_to_errno(status);
+                return nfs_stat_to_errno(status);
 
         hdrlen = (u8 *) p - (u8 *) iov->iov_base;
         if (iov->iov_len < hdrlen) {
@@ -537,7 +537,7 @@ nfs_xdr_stat(struct rpc_rqst *req, __be32 *p, void *dummy)
         int     status;
 
         if ((status = ntohl(*p++)) != 0)
-                status = -nfs_stat_to_errno(status);
+                status = nfs_stat_to_errno(status);
         return status;
 }
 
@@ -551,7 +551,7 @@ nfs_xdr_attrstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
         int     status;
 
         if ((status = ntohl(*p++)))
-                return -nfs_stat_to_errno(status);
+                return nfs_stat_to_errno(status);
         xdr_decode_fattr(p, fattr);
         return 0;
 }
@@ -566,7 +566,7 @@ nfs_xdr_diropres(struct rpc_rqst *req, __be32 *p, struct nfs_diropok *res)
         int     status;
 
         if ((status = ntohl(*p++)))
-                return -nfs_stat_to_errno(status);
+                return nfs_stat_to_errno(status);
         p = xdr_decode_fhandle(p, res->fh);
         xdr_decode_fattr(p, res->fattr);
         return 0;
@@ -604,7 +604,7 @@ nfs_xdr_readlinkres(struct rpc_rqst *req, __be32 *p, void *dummy)
         int     status;
 
         if ((status = ntohl(*p++)))
-                return -nfs_stat_to_errno(status);
+                return nfs_stat_to_errno(status);
         /* Convert length of symlink */
         len = ntohl(*p++);
         if (len >= rcvbuf->page_len) {
@@ -653,7 +653,7 @@ nfs_xdr_statfsres(struct rpc_rqst *req, __be32 *p, struct nfs2_fsstat *res)
         int     status;
 
         if ((status = ntohl(*p++)))
-                return -nfs_stat_to_errno(status);
+                return nfs_stat_to_errno(status);
 
         res->tsize  = ntohl(*p++);
         res->bsize  = ntohl(*p++);
@@ -672,39 +672,39 @@ static struct {
         int errno;
 } nfs_errtbl[] = {
         { NFS_OK,               0               },
-        { NFSERR_PERM,          EPERM           },
-        { NFSERR_NOENT,         ENOENT          },
-        { NFSERR_IO,            errno_NFSERR_IO },
-        { NFSERR_NXIO,          ENXIO           },
-/*      { NFSERR_EAGAIN,        EAGAIN          }, */
-        { NFSERR_ACCES,         EACCES          },
-        { NFSERR_EXIST,         EEXIST          },
-        { NFSERR_XDEV,          EXDEV           },
-        { NFSERR_NODEV,         ENODEV          },
-        { NFSERR_NOTDIR,        ENOTDIR         },
-        { NFSERR_ISDIR,         EISDIR          },
-        { NFSERR_INVAL,         EINVAL          },
-        { NFSERR_FBIG,          EFBIG           },
-        { NFSERR_NOSPC,         ENOSPC          },
-        { NFSERR_ROFS,          EROFS           },
-        { NFSERR_MLINK,         EMLINK          },
-        { NFSERR_NAMETOOLONG,   ENAMETOOLONG    },
-        { NFSERR_NOTEMPTY,      ENOTEMPTY       },
-        { NFSERR_DQUOT,         EDQUOT          },
-        { NFSERR_STALE,         ESTALE          },
-        { NFSERR_REMOTE,        EREMOTE         },
+        { NFSERR_PERM,          -EPERM          },
+        { NFSERR_NOENT,         -ENOENT         },
+        { NFSERR_IO,            -errno_NFSERR_IO},
+        { NFSERR_NXIO,          -ENXIO          },
+/*      { NFSERR_EAGAIN,        -EAGAIN         }, */
+        { NFSERR_ACCES,         -EACCES         },
+        { NFSERR_EXIST,         -EEXIST         },
+        { NFSERR_XDEV,          -EXDEV          },
+        { NFSERR_NODEV,         -ENODEV         },
+        { NFSERR_NOTDIR,        -ENOTDIR        },
+        { NFSERR_ISDIR,         -EISDIR         },
+        { NFSERR_INVAL,         -EINVAL         },
+        { NFSERR_FBIG,          -EFBIG          },
+        { NFSERR_NOSPC,         -ENOSPC         },
+        { NFSERR_ROFS,          -EROFS          },
+        { NFSERR_MLINK,         -EMLINK         },
+        { NFSERR_NAMETOOLONG,   -ENAMETOOLONG   },
+        { NFSERR_NOTEMPTY,      -ENOTEMPTY      },
+        { NFSERR_DQUOT,         -EDQUOT         },
+        { NFSERR_STALE,         -ESTALE         },
+        { NFSERR_REMOTE,        -EREMOTE        },
 #ifdef EWFLUSH
-        { NFSERR_WFLUSH,        EWFLUSH         },
+        { NFSERR_WFLUSH,        -EWFLUSH        },
 #endif
-        { NFSERR_BADHANDLE,     EBADHANDLE      },
-        { NFSERR_NOT_SYNC,      ENOTSYNC        },
-        { NFSERR_BAD_COOKIE,    EBADCOOKIE      },
-        { NFSERR_NOTSUPP,       ENOTSUPP        },
-        { NFSERR_TOOSMALL,      ETOOSMALL       },
-        { NFSERR_SERVERFAULT,   ESERVERFAULT    },
-        { NFSERR_BADTYPE,       EBADTYPE        },
-        { NFSERR_JUKEBOX,       EJUKEBOX        },
-        { -1,                   EIO             }
+        { NFSERR_BADHANDLE,     -EBADHANDLE     },
+        { NFSERR_NOT_SYNC,      -ENOTSYNC       },
+        { NFSERR_BAD_COOKIE,    -EBADCOOKIE     },
+        { NFSERR_NOTSUPP,       -ENOTSUPP       },
+        { NFSERR_TOOSMALL,      -ETOOSMALL      },
+        { NFSERR_SERVERFAULT,   -ESERVERFAULT   },
+        { NFSERR_BADTYPE,       -EBADTYPE       },
+        { NFSERR_JUKEBOX,       -EJUKEBOX       },
+        { -1,                   -EIO            }
 };
 
 /*
diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c
index fb03048ac650..11cdddec1432 100644
--- a/fs/nfs/nfs3xdr.c
+++ b/fs/nfs/nfs3xdr.c
@@ -515,7 +515,7 @@ nfs3_xdr_readdirres(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirres *res
         /* Decode post_op_attrs */
         p = xdr_decode_post_op_attr(p, res->dir_attr);
         if (status)
-                return -nfs_stat_to_errno(status);
+                return nfs_stat_to_errno(status);
         /* Decode verifier cookie */
         if (res->verf) {
                 res->verf[0] = *p++;
@@ -751,7 +751,7 @@ nfs3_xdr_attrstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
         int     status;
 
         if ((status = ntohl(*p++)))
-                return -nfs_stat_to_errno(status);
+                return nfs_stat_to_errno(status);
         xdr_decode_fattr(p, fattr);
         return 0;
 }
@@ -766,7 +766,7 @@ nfs3_xdr_wccstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
         int     status;
 
         if ((status = ntohl(*p++)))
-                status = -nfs_stat_to_errno(status);
+                status = nfs_stat_to_errno(status);
         xdr_decode_wcc_data(p, fattr);
         return status;
 }
@@ -786,7 +786,7 @@ nfs3_xdr_lookupres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res)
         int     status;
 
         if ((status = ntohl(*p++))) {
-                status = -nfs_stat_to_errno(status);
+                status = nfs_stat_to_errno(status);
         } else {
                 if (!(p = xdr_decode_fhandle(p, res->fh)))
                         return -errno_NFSERR_IO;
@@ -806,7 +806,7 @@ nfs3_xdr_accessres(struct rpc_rqst *req, __be32 *p, struct nfs3_accessres *res)
 
         p = xdr_decode_post_op_attr(p, res->fattr);
         if (status)
-                return -nfs_stat_to_errno(status);
+                return nfs_stat_to_errno(status);
         res->access = ntohl(*p++);
         return 0;
 }
@@ -843,7 +843,7 @@ nfs3_xdr_readlinkres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
         p = xdr_decode_post_op_attr(p, fattr);
 
         if (status != 0)
-                return -nfs_stat_to_errno(status);
+                return nfs_stat_to_errno(status);
 
         /* Convert length of symlink */
         len = ntohl(*p++);
@@ -891,7 +891,7 @@ nfs3_xdr_readres(struct rpc_rqst *req, __be32 *p, struct nfs_readres *res)
         p = xdr_decode_post_op_attr(p, res->fattr);
 
         if (status != 0)
-                return -nfs_stat_to_errno(status);
+                return nfs_stat_to_errno(status);
 
         /* Decode reply count and EOF flag. NFSv3 is somewhat redundant
          * in that it puts the count both in the res struct and in the
@@ -941,7 +941,7 @@ nfs3_xdr_writeres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res)
         p = xdr_decode_wcc_data(p, res->fattr);
 
         if (status != 0)
-                return -nfs_stat_to_errno(status);
+                return nfs_stat_to_errno(status);
 
         res->count = ntohl(*p++);
         res->verf->committed = (enum nfs3_stable_how)ntohl(*p++);
@@ -972,7 +972,7 @@ nfs3_xdr_createres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res)
                         res->fattr->valid = 0;
                 }
         } else {
-                status = -nfs_stat_to_errno(status);
+                status = nfs_stat_to_errno(status);
         }
         p = xdr_decode_wcc_data(p, res->dir_attr);
         return status;
@@ -987,7 +987,7 @@ nfs3_xdr_renameres(struct rpc_rqst *req, __be32 *p, struct nfs3_renameres *res)
         int     status;
 
         if ((status = ntohl(*p++)) != 0)
-                status = -nfs_stat_to_errno(status);
+                status = nfs_stat_to_errno(status);
         p = xdr_decode_wcc_data(p, res->fromattr);
         p = xdr_decode_wcc_data(p, res->toattr);
         return status;
@@ -1002,7 +1002,7 @@ nfs3_xdr_linkres(struct rpc_rqst *req, __be32 *p, struct nfs3_linkres *res)
         int     status;
 
         if ((status = ntohl(*p++)) != 0)
-                status = -nfs_stat_to_errno(status);
+                status = nfs_stat_to_errno(status);
         p = xdr_decode_post_op_attr(p, res->fattr);
         p = xdr_decode_wcc_data(p, res->dir_attr);
         return status;
@@ -1020,7 +1020,7 @@ nfs3_xdr_fsstatres(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *res)
 
         p = xdr_decode_post_op_attr(p, res->fattr);
         if (status != 0)
-                return -nfs_stat_to_errno(status);
+                return nfs_stat_to_errno(status);
 
         p = xdr_decode_hyper(p, &res->tbytes);
         p = xdr_decode_hyper(p, &res->fbytes);
@@ -1045,7 +1045,7 @@ nfs3_xdr_fsinfores(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *res)
 
         p = xdr_decode_post_op_attr(p, res->fattr);
         if (status != 0)
-                return -nfs_stat_to_errno(status);
+                return nfs_stat_to_errno(status);
 
         res->rtmax  = ntohl(*p++);
         res->rtpref = ntohl(*p++);
@@ -1073,7 +1073,7 @@ nfs3_xdr_pathconfres(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *res)
 
         p = xdr_decode_post_op_attr(p, res->fattr);
         if (status != 0)
-                return -nfs_stat_to_errno(status);
+                return nfs_stat_to_errno(status);
         res->max_link = ntohl(*p++);
         res->max_namelen = ntohl(*p++);
 
@@ -1092,7 +1092,7 @@ nfs3_xdr_commitres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res)
         status = ntohl(*p++);
         p = xdr_decode_wcc_data(p, res->fattr);
         if (status != 0)
-                return -nfs_stat_to_errno(status);
+                return nfs_stat_to_errno(status);
 
         res->verf->verifier[0] = *p++;
         res->verf->verifier[1] = *p++;
@@ -1114,7 +1114,7 @@ nfs3_xdr_getaclres(struct rpc_rqst *req, __be32 *p,
         int err, base;
 
         if (status != 0)
-                return -nfs_stat_to_errno(status);
+                return nfs_stat_to_errno(status);
         p = xdr_decode_post_op_attr(p, res->fattr);
         res->mask = ntohl(*p++);
         if (res->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
@@ -1141,7 +1141,7 @@ nfs3_xdr_setaclres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
         int status = ntohl(*p++);
 
         if (status)
-                return -nfs_stat_to_errno(status);
+                return nfs_stat_to_errno(status);
         xdr_decode_post_op_attr(p, fattr);
         return 0;
 }
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index b8b2e391d183..809ef0d787e3 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -2241,7 +2241,7 @@ static int decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected)
         }
         READ32(nfserr);
         if (nfserr != NFS_OK)
-                return -nfs4_stat_to_errno(nfserr);
+                return nfs4_stat_to_errno(nfserr);
         return 0;
 }
 
@@ -3760,7 +3760,7 @@ static int decode_setclientid(struct xdr_stream *xdr, struct nfs_client *clp)
                 READ_BUF(len);
                 return -NFSERR_CLID_INUSE;
         } else
-                return -nfs4_stat_to_errno(nfserr);
+                return nfs4_stat_to_errno(nfserr);
 
         return 0;
 }
@@ -4422,7 +4422,7 @@ static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs_fsinf
         if (!status)
                 status = decode_fsinfo(&xdr, fsinfo);
         if (!status)
-                status = -nfs4_stat_to_errno(hdr.status);
+                status = nfs4_stat_to_errno(hdr.status);
         return status;
 }
 
@@ -4512,7 +4512,7 @@ static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p,
         if (!status)
                 status = decode_setclientid(&xdr, clp);
         if (!status)
-                status = -nfs4_stat_to_errno(hdr.status);
+                status = nfs4_stat_to_errno(hdr.status);
         return status;
 }
 
@@ -4534,7 +4534,7 @@ static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, str
         if (!status)
                 status = decode_fsinfo(&xdr, fsinfo);
         if (!status)
-                status = -nfs4_stat_to_errno(hdr.status);
+                status = nfs4_stat_to_errno(hdr.status);
         return status;
 }
 
@@ -4644,42 +4644,42 @@ static struct {
         int errno;
 } nfs_errtbl[] = {
         { NFS4_OK,              0               },
-        { NFS4ERR_PERM,         EPERM           },
-        { NFS4ERR_NOENT,        ENOENT          },
-        { NFS4ERR_IO,           errno_NFSERR_IO },
-        { NFS4ERR_NXIO,         ENXIO           },
-        { NFS4ERR_ACCESS,       EACCES          },
-        { NFS4ERR_EXIST,        EEXIST          },
-        { NFS4ERR_XDEV,         EXDEV           },
-        { NFS4ERR_NOTDIR,       ENOTDIR         },
-        { NFS4ERR_ISDIR,        EISDIR          },
-        { NFS4ERR_INVAL,        EINVAL          },
-        { NFS4ERR_FBIG,         EFBIG           },
-        { NFS4ERR_NOSPC,        ENOSPC          },
-        { NFS4ERR_ROFS,         EROFS           },
-        { NFS4ERR_MLINK,        EMLINK          },
-        { NFS4ERR_NAMETOOLONG,  ENAMETOOLONG    },
-        { NFS4ERR_NOTEMPTY,     ENOTEMPTY       },
-        { NFS4ERR_DQUOT,        EDQUOT          },
-        { NFS4ERR_STALE,        ESTALE          },
-        { NFS4ERR_BADHANDLE,    EBADHANDLE      },
-        { NFS4ERR_BADOWNER,     EINVAL          },
-        { NFS4ERR_BADNAME,      EINVAL          },
-        { NFS4ERR_BAD_COOKIE,   EBADCOOKIE      },
-        { NFS4ERR_NOTSUPP,      ENOTSUPP        },
-        { NFS4ERR_TOOSMALL,     ETOOSMALL       },
-        { NFS4ERR_SERVERFAULT,  ESERVERFAULT    },
-        { NFS4ERR_BADTYPE,      EBADTYPE        },
-        { NFS4ERR_LOCKED,       EAGAIN          },
-        { NFS4ERR_RESOURCE,     EREMOTEIO       },
-        { NFS4ERR_SYMLINK,      ELOOP           },
-        { NFS4ERR_OP_ILLEGAL,   EOPNOTSUPP      },
-        { NFS4ERR_DEADLOCK,     EDEADLK         },
-        { NFS4ERR_WRONGSEC,     EPERM           }, /* FIXME: this needs
+        { NFS4ERR_PERM,         -EPERM          },
+        { NFS4ERR_NOENT,        -ENOENT         },
+        { NFS4ERR_IO,           -errno_NFSERR_IO},
+        { NFS4ERR_NXIO,         -ENXIO          },
+        { NFS4ERR_ACCESS,       -EACCES         },
+        { NFS4ERR_EXIST,        -EEXIST         },
+        { NFS4ERR_XDEV,         -EXDEV          },
+        { NFS4ERR_NOTDIR,       -ENOTDIR        },
+        { NFS4ERR_ISDIR,        -EISDIR         },
+        { NFS4ERR_INVAL,        -EINVAL         },
+        { NFS4ERR_FBIG,         -EFBIG          },
+        { NFS4ERR_NOSPC,        -ENOSPC         },
+        { NFS4ERR_ROFS,         -EROFS          },
+        { NFS4ERR_MLINK,        -EMLINK         },
+        { NFS4ERR_NAMETOOLONG,  -ENAMETOOLONG   },
+        { NFS4ERR_NOTEMPTY,     -ENOTEMPTY      },
+        { NFS4ERR_DQUOT,        -EDQUOT         },
+        { NFS4ERR_STALE,        -ESTALE         },
+        { NFS4ERR_BADHANDLE,    -EBADHANDLE     },
+        { NFS4ERR_BADOWNER,     -EINVAL         },
+        { NFS4ERR_BADNAME,      -EINVAL         },
+        { NFS4ERR_BAD_COOKIE,   -EBADCOOKIE     },
+        { NFS4ERR_NOTSUPP,      -ENOTSUPP       },
+        { NFS4ERR_TOOSMALL,     -ETOOSMALL      },
+        { NFS4ERR_SERVERFAULT,  -ESERVERFAULT   },
+        { NFS4ERR_BADTYPE,      -EBADTYPE       },
+        { NFS4ERR_LOCKED,       -EAGAIN         },
+        { NFS4ERR_RESOURCE,     -EREMOTEIO      },
+        { NFS4ERR_SYMLINK,      -ELOOP          },
+        { NFS4ERR_OP_ILLEGAL,   -EOPNOTSUPP     },
+        { NFS4ERR_DEADLOCK,     -EDEADLK        },
+        { NFS4ERR_WRONGSEC,     -EPERM          }, /* FIXME: this needs
                                                     * to be handled by a
                                                     * middle-layer.
                                                     */
-        { -1,                   EIO             }
+        { -1,                   -EIO            }
 };
 
 /*
@@ -4696,14 +4696,14 @@ nfs4_stat_to_errno(int stat)
         }
         if (stat <= 10000 || stat > 10100) {
                 /* The server is looney tunes. */
-                return ESERVERFAULT;
+                return -ESERVERFAULT;
         }
         /* If we cannot translate the error, the recovery routines should
          * handle it.
          * Note: remaining NFSv4 error codes have values > 10000, so should
          * not conflict with native Linux error codes.
          */
-        return stat;
+        return -stat;
 }
 
 #define PROC(proc, argtype, restype)                            \