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nfsd4: it's OK to return nfserr_symlink 

The nfsd4 code has a bunch of special exceptions for error returns which
map nfserr_symlink to other errors.

In fact, the spec makes it clear that nfserr_symlink is to be preferred
over less specific errors where possible.

The patch that introduced it back in 2.6.4 is "kNFSd: correct symlink
related error returns.", which claims that these special exceptions are
represent an NFSv4 break from v2/v3 tradition--when in fact the symlink
error was introduced with v4.

I suspect what happened was pynfs tests were written that were overly
faithful to the (known-incomplete) rfc3530 error return lists, and then
code was fixed up mindlessly to make the tests pass.

Delete these unnecessary exceptions.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
wifi-calibration
J. Bruce Fields 2011-08-15 18:39:32 -04:00
parent e281d81009
commit 75c096f753
3 changed files with 2 additions and 23 deletions
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15
fs/nfsd/nfs4proc.c
View File

@ -488,17 +488,12 @@ static __be32
nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_commit *commit)
{
__be32 status;
u32 *p = (u32 *)commit->co_verf.data;
*p++ = nfssvc_boot.tv_sec;
*p++ = nfssvc_boot.tv_usec;
status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
commit->co_count);
if (status == nfserr_symlink)
status = nfserr_inval;
return status;
}
static __be32
@ -513,8 +508,6 @@ nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
NFSD_MAY_CREATE);
if (status == nfserr_symlink)
status = nfserr_notdir;
if (status)
return status;
@ -740,8 +733,6 @@ nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
return nfserr_grace;
status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
remove->rm_name, remove->rm_namelen);
if (status == nfserr_symlink)
return nfserr_notdir;
if (!status) {
fh_unlock(&cstate->current_fh);
set_change_info(&remove->rm_cinfo, &cstate->current_fh);
@ -772,8 +763,6 @@ nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
(S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
status = nfserr_exist;
else if (status == nfserr_symlink)
status = nfserr_notdir;
if (!status) {
set_change_info(&rename->rn_sinfo, &cstate->current_fh);
@ -913,8 +902,6 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
write->wr_bytes_written = cnt;
if (status == nfserr_symlink)
status = nfserr_inval;
return status;
}

6
fs/nfsd/nfs4state.c
View File

@ -4179,12 +4179,8 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid))
goto out;
if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) {
dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n");
if (status == nfserr_symlink)
status = nfserr_inval;
if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0)))
goto out;
}
inode = cstate->current_fh.fh_dentry->d_inode;
locks_init_lock(&file_lock);

4
fs/nfsd/nfs4xdr.c
View File

@ -2778,8 +2778,6 @@ nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
&maxcount);
if (nfserr == nfserr_symlink)
nfserr = nfserr_inval;
if (nfserr)
return nfserr;
eof = (read->rd_offset + maxcount >=
@ -2905,8 +2903,6 @@ nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4
readdir->common.err == nfserr_toosmall &&
readdir->buffer == page)
nfserr = nfserr_toosmall;
if (nfserr == nfserr_symlink)
nfserr = nfserr_notdir;
if (nfserr)
goto err_no_verf;