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The NFS client generated directory block(s) with d_fileno == 0

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so that it would not return less data than requested.
Since returning less directory data than requested is not a problem
for FreeBSD and even UFS no longer returns directory structures
with d_fileno == 0, this patch stops the client from doing this.
Although entries with d_fileno == 0 should not be a problem,
the man pages no longer document that these entries should be
ignored, so there was a concern that these entries might be an
issue in the future.

Suggested by:	trasz
Tested by:	trasz
MFC after:	2 weeks
This commit is contained in:
Rick Macklem 2015-05-23 21:58:41 +00:00
parent 7440be2dcb
commit 262a84286d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=283330
1 changed files with 0 additions and 38 deletions
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38
sys/fs/nfsclient/nfs_clrpcops.c
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@ -3072,25 +3072,6 @@ nfsrpc_readdir(vnode_t vp, struct uio *uiop, nfsuint64 *cookiep,
*eofp = eof; *eofp = eof;
} }
/*
* Add extra empty records to any remaining DIRBLKSIZ chunks.
*/
while (uio_uio_resid(uiop) > 0 && ((size_t)(uio_uio_resid(uiop))) != tresid) {
dp = (struct dirent *) CAST_DOWN(caddr_t, uio_iov_base(uiop));
dp->d_type = DT_UNKNOWN;
dp->d_fileno = 0;
dp->d_namlen = 0;
dp->d_name[0] = '\0';
tl = (u_int32_t *)&dp->d_name[4];
*tl++ = cookie.lval[0];
*tl = cookie.lval[1];
dp->d_reclen = DIRBLKSIZ;
uio_iov_base_add(uiop, DIRBLKSIZ);
uio_iov_len_add(uiop, -(DIRBLKSIZ));
uio_uio_resid_add(uiop, -(DIRBLKSIZ));
uiop->uio_offset += DIRBLKSIZ;
}
nfsmout: nfsmout:
if (nd->nd_mrep != NULL) if (nd->nd_mrep != NULL)
mbuf_freem(nd->nd_mrep); mbuf_freem(nd->nd_mrep);
@ -3565,25 +3546,6 @@ nfsrpc_readdirplus(vnode_t vp, struct uio *uiop, nfsuint64 *cookiep,
*eofp = eof; *eofp = eof;
} }
/*
* Add extra empty records to any remaining DIRBLKSIZ chunks.
*/
while (uio_uio_resid(uiop) > 0 && uio_uio_resid(uiop) != tresid) {
dp = (struct dirent *)uio_iov_base(uiop);
dp->d_type = DT_UNKNOWN;
dp->d_fileno = 0;
dp->d_namlen = 0;
dp->d_name[0] = '\0';
tl = (u_int32_t *)&dp->d_name[4];
*tl++ = cookie.lval[0];
*tl = cookie.lval[1];
dp->d_reclen = DIRBLKSIZ;
uio_iov_base_add(uiop, DIRBLKSIZ);
uio_iov_len_add(uiop, -(DIRBLKSIZ));
uio_uio_resid_add(uiop, -(DIRBLKSIZ));
uiop->uio_offset += DIRBLKSIZ;
}
nfsmout: nfsmout:
if (nd->nd_mrep != NULL) if (nd->nd_mrep != NULL)
mbuf_freem(nd->nd_mrep); mbuf_freem(nd->nd_mrep);