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Commit abd795e9 authored by Trond Myklebust's avatar Trond Myklebust
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NFSv4: Remove unnecessary post-op attributes from read/write/... calls. The 

new attribute revalidation scheme doesn't rely on them.
parent 85ac427f
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Showing with 8 additions and 223 deletions
fs/nfs/nfs4xdr.c
View file @ abd795e9
......@@ -90,12 +90,6 @@ static int nfs_stat_to_errno(int);
#define decode_savefh_maxsz (op_decode_hdr_maxsz)
#define encode_restorefh_maxsz (op_encode_hdr_maxsz)
#define decode_restorefh_maxsz (op_decode_hdr_maxsz)
#define encode_read_getattr_maxsz (op_encode_hdr_maxsz + 2)
#define decode_read_getattr_maxsz (op_decode_hdr_maxsz + 8)
#define encode_pre_write_getattr_maxsz (op_encode_hdr_maxsz + 2)
#define decode_pre_write_getattr_maxsz (op_decode_hdr_maxsz + 5)
#define encode_post_write_getattr_maxsz (op_encode_hdr_maxsz + 2)
#define decode_post_write_getattr_maxsz (op_decode_hdr_maxsz + 13)
#define encode_fsinfo_maxsz (op_encode_hdr_maxsz + 2)
#define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 11)
#define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
......@@ -120,32 +114,22 @@ static int nfs_stat_to_errno(int);
#define NFS4_dec_compound_sz (1024) /* XXX: large enough? */
#define NFS4_enc_read_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_read_getattr_maxsz + \
op_encode_hdr_maxsz + 7)
#define NFS4_dec_read_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
decode_read_getattr_maxsz + \
op_decode_hdr_maxsz + 2)
#define NFS4_enc_write_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_pre_write_getattr_maxsz + \
op_encode_hdr_maxsz + 8 + \
encode_post_write_getattr_maxsz)
op_encode_hdr_maxsz + 8)
#define NFS4_dec_write_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
decode_pre_write_getattr_maxsz + \
op_decode_hdr_maxsz + 4 + \
decode_post_write_getattr_maxsz)
op_decode_hdr_maxsz + 4)
#define NFS4_enc_commit_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_pre_write_getattr_maxsz + \
op_encode_hdr_maxsz + 3 + \
encode_post_write_getattr_maxsz)
op_encode_hdr_maxsz + 3)
#define NFS4_dec_commit_sz (compound_decode_hdr_maxsz + \
decode_putfh_maxsz + \
decode_pre_write_getattr_maxsz + \
op_decode_hdr_maxsz + 2 + \
decode_post_write_getattr_maxsz)
op_decode_hdr_maxsz + 2)
#define NFS4_enc_open_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_savefh_maxsz + \
......@@ -574,38 +558,6 @@ encode_getattr(struct xdr_stream *xdr, struct nfs4_getattr *getattr)
getattr->gt_bmval[1]);
}
/*
* Request the change attribute in order to check attribute+cache consistency
*/
static inline int
encode_read_getattr(struct xdr_stream *xdr)
{
return encode_getattr_two(xdr, FATTR4_WORD0_CHANGE,
FATTR4_WORD1_TIME_ACCESS);
}
/*
* Request the change attribute prior to doing a write operation
*/
static inline int
encode_pre_write_getattr(struct xdr_stream *xdr)
{
/* Request the change attribute */
return encode_getattr_one(xdr, FATTR4_WORD0_CHANGE);
}
/*
* Request the change attribute, size, and [cm]time after a write operation
*/
static inline int
encode_post_write_getattr(struct xdr_stream *xdr)
{
return encode_getattr_two(xdr, FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE,
FATTR4_WORD1_SPACE_USED |
FATTR4_WORD1_TIME_METADATA |
FATTR4_WORD1_TIME_MODIFY);
}
static int
encode_fsinfo(struct xdr_stream *xdr)
{
......@@ -1421,7 +1373,7 @@ nfs4_xdr_enc_read(struct rpc_rqst *req, uint32_t *p, struct nfs_readargs *args)
struct rpc_auth *auth = req->rq_task->tk_auth;
struct xdr_stream xdr;
struct compound_hdr hdr = {
.nops = 3,
.nops = 2,
};
int replen, status;
......@@ -1433,14 +1385,12 @@ nfs4_xdr_enc_read(struct rpc_rqst *req, uint32_t *p, struct nfs_readargs *args)
status = encode_read(&xdr, args);
if (status)
goto out;
status = encode_read_getattr(&xdr);
/* set up reply iovec
* toplevel status + taglen=0 + rescount + OP_PUTFH + status
* + OP_READ + status + eof + datalen = 9
*/
replen = (RPC_REPHDRSIZE + auth->au_rslack +
NFS4_dec_read_sz - decode_read_getattr_maxsz) << 2;
replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
xdr_inline_pages(&req->rq_rcv_buf, replen,
args->pages, args->pgbase, args->count);
out:
......@@ -1481,22 +1431,16 @@ nfs4_xdr_enc_write(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *args
{
struct xdr_stream xdr;
struct compound_hdr hdr = {
.nops = 4,
.nops = 2,
};
int status;
xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_compound_hdr(&xdr, &hdr);
status = encode_putfh(&xdr, args->fh);
if (status)
goto out;
status = encode_pre_write_getattr(&xdr);
if (status)
goto out;
status = encode_write(&xdr, args);
if (status)
goto out;
status = encode_post_write_getattr(&xdr);
out:
return status;
}
......@@ -1509,22 +1453,16 @@ nfs4_xdr_enc_commit(struct rpc_rqst *req, uint32_t *p, struct nfs_writeargs *arg
{
struct xdr_stream xdr;
struct compound_hdr hdr = {
.nops = 4,
.nops = 2,
};
int status;
xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_compound_hdr(&xdr, &hdr);
status = encode_putfh(&xdr, args->fh);
if (status)
goto out;
status = encode_pre_write_getattr(&xdr);
if (status)
goto out;
status = encode_commit(&xdr, args);
if (status)
goto out;
status = encode_post_write_getattr(&xdr);
out:
return status;
}
......@@ -2307,138 +2245,6 @@ decode_getattr(struct xdr_stream *xdr, struct nfs4_getattr *getattr,
DECODE_TAIL;
}
static int
decode_change_attr(struct xdr_stream *xdr, uint64_t *change_attr)
{
uint32_t *p;
uint32_t attrlen, bmlen, bmval = 0;
int status;
status = decode_op_hdr(xdr, OP_GETATTR);
if (status)
return status;
READ_BUF(4);
READ32(bmlen);
if (bmlen < 1)
return -EIO;
READ_BUF(bmlen << 2);
READ32(bmval);
if (bmval != FATTR4_WORD0_CHANGE) {
printk(KERN_NOTICE "decode_change_attr: server returned bad attribute bitmap 0x%x\n",
(unsigned int)bmval);
return -EIO;
}
READ_BUF(4);
READ32(attrlen);
READ_BUF(attrlen);
if (attrlen < 8) {
printk(KERN_NOTICE "decode_change_attr: server returned bad attribute length %u\n",
(unsigned int)attrlen);
return -EIO;
}
READ64(*change_attr);
return 0;
}
static int
decode_read_getattr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
{
uint32_t *p;
uint32_t attrlen, bmlen, bmval0 = 0, bmval1 = 0;
int status;
status = decode_op_hdr(xdr, OP_GETATTR);
if (status)
return status;
READ_BUF(4);
READ32(bmlen);
if (bmlen < 1)
return -EIO;
READ_BUF(bmlen << 2);
READ32(bmval0);
if (bmval0 != FATTR4_WORD0_CHANGE)
goto out_bad_bitmap;
if (bmlen > 1) {
READ32(bmval1);
if (bmval1 & ~(FATTR4_WORD1_TIME_ACCESS))
goto out_bad_bitmap;
}
READ_BUF(4);
READ32(attrlen);
READ_BUF(attrlen);
if (attrlen < 16) {
printk(KERN_NOTICE "decode_post_write_getattr: server returned bad attribute length %u\n",
(unsigned int)attrlen);
return -EIO;
}
READ64(fattr->change_attr);
if (bmval1 & FATTR4_WORD1_TIME_ACCESS)
READTIME(fattr->atime);
fattr->bitmap[0] = bmval0;
fattr->bitmap[1] = bmval1;
return 0;
out_bad_bitmap:
printk(KERN_NOTICE "decode_read_getattr: server returned bad attribute bitmap 0x%x/0x%x\n",
(unsigned int)bmval0, (unsigned int)bmval1);
return -EIO;
}
static int
decode_pre_write_getattr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
{
return decode_change_attr(xdr, &fattr->pre_change_attr);
}
static int
decode_post_write_getattr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
{
uint32_t *p;
uint32_t attrlen, bmlen, bmval0 = 0, bmval1 = 0;
int status;
status = decode_op_hdr(xdr, OP_GETATTR);
if (status)
return status;
READ_BUF(4);
READ32(bmlen);
if (bmlen < 1)
return -EIO;
READ_BUF(bmlen << 2);
READ32(bmval0);
if (bmval0 != (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE))
goto out_bad_bitmap;
if (bmlen > 1) {
READ32(bmval1);
if (bmval1 & ~(FATTR4_WORD1_SPACE_USED |
FATTR4_WORD1_TIME_METADATA |
FATTR4_WORD1_TIME_MODIFY))
goto out_bad_bitmap;
}
READ_BUF(4);
READ32(attrlen);
READ_BUF(attrlen);
if (attrlen < 16) {
printk(KERN_NOTICE "decode_post_write_getattr: server returned bad attribute length %u\n",
(unsigned int)attrlen);
return -EIO;
}
READ64(fattr->change_attr);
READ64(fattr->size);
if (bmval1 & FATTR4_WORD1_SPACE_USED)
READ64(fattr->du.nfs3.used);
if (bmval1 & FATTR4_WORD1_TIME_METADATA)
READTIME(fattr->ctime);
if (bmval1 & FATTR4_WORD1_TIME_MODIFY)
READTIME(fattr->mtime);
fattr->bitmap[0] = bmval0;
fattr->bitmap[1] = bmval1;
return 0;
out_bad_bitmap:
printk(KERN_NOTICE "decode_post_write_getattr: server returned bad attribute bitmap 0x%x/0x%x\n",
(unsigned int)bmval0, (unsigned int)bmval1);
return -EIO;
}
static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server)
{
uint32_t *savep;
......@@ -3410,11 +3216,6 @@ nfs4_xdr_dec_read(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_readres *res)
if (status)
goto out;
status = decode_read(&xdr, rqstp, res);
if (status)
goto out;
status = decode_read_getattr(&xdr, res->fattr);
if (!status)
status = -nfs_stat_to_errno(hdr.status);
if (!status)
status = res->count;
out:
......@@ -3436,17 +3237,9 @@ nfs4_xdr_dec_write(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *res
if (status)
goto out;
status = decode_putfh(&xdr);
if (status)
goto out;
status = decode_pre_write_getattr(&xdr, res->fattr);
if (status)
goto out;
status = decode_write(&xdr, res);
if (status)
goto out;
status = decode_post_write_getattr(&xdr, res->fattr);
if (!status)
status = -nfs_stat_to_errno(hdr.status);
if (!status)
status = res->count;
out:
......@@ -3468,17 +3261,9 @@ nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, uint32_t *p, struct nfs_writeres *re
if (status)
goto out;
status = decode_putfh(&xdr);
if (status)
goto out;
status = decode_pre_write_getattr(&xdr, res->fattr);
if (status)
goto out;
status = decode_commit(&xdr, res);
if (status)
goto out;
status = decode_post_write_getattr(&xdr, res->fattr);
if (!status)
status = -nfs_stat_to_errno(hdr.status);
out:
return status;
}
......
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