From: "J. Bruce Fields" <bfields@redhat.com>
To: linux-nfs@vger.kernel.org
Cc: "J. Bruce Fields" <bfields@redhat.com>
Subject: [PATCH 22/50] nfsd4: use xdr_truncate_encode
Date: Sat, 22 Mar 2014 21:11:53 -0400 [thread overview]
Message-ID: <1395537141-10389-23-git-send-email-bfields@redhat.com> (raw)
In-Reply-To: <1395537141-10389-1-git-send-email-bfields@redhat.com>
From: "J. Bruce Fields" <bfields@redhat.com>
Now that lengths are reliable, we can use xdr_truncate instead of
open-coding it everywhere.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
---
fs/nfsd/nfs4xdr.c | 28 +++++++++++-----------------
1 file changed, 11 insertions(+), 17 deletions(-)
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index a3dce3c..e5cc354 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -2043,7 +2043,7 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, struct svc_export
struct svc_fh *tempfh = NULL;
struct kstatfs statfs;
__be32 *p;
- __be32 *start = xdr->p;
+ int starting_len = xdr->buf->len;
__be32 *attrlenp;
u32 dummy;
u64 dummy64;
@@ -2534,13 +2534,8 @@ out:
kfree(acl);
if (tempfh)
fh_put(tempfh);
- if (status) {
- int nbytes = (char *)xdr->p - (char *)start;
- /* open code what *should* be xdr_truncate(xdr, len); */
- xdr->iov->iov_len -= nbytes;
- xdr->buf->len -= nbytes;
- xdr->p = start;
- }
+ if (status)
+ xdr_truncate_encode(xdr, starting_len);
return status;
out_nfserr:
status = nfserrno(err);
@@ -3005,6 +3000,7 @@ nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
struct page *page;
unsigned long maxcount;
struct xdr_stream *xdr = &resp->xdr;
+ int starting_len = xdr->buf->len;
long len;
__be32 *p;
@@ -3041,8 +3037,8 @@ nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
&maxcount);
if (nfserr) {
- xdr->p -= 2;
- xdr->iov->iov_len -= 8;
+ xdr->buf->page_len = 0;
+ xdr_truncate_encode(xdr, starting_len);
return nfserr;
}
eof = (read->rd_offset + maxcount >=
@@ -3077,6 +3073,7 @@ nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd
int maxcount;
struct xdr_stream *xdr = &resp->xdr;
char *page;
+ int length_offset = xdr->buf->len;
__be32 *p;
if (nfserr)
@@ -3101,8 +3098,7 @@ nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd
if (nfserr == nfserr_isdir)
nfserr = nfserr_inval;
if (nfserr) {
- xdr->p--;
- xdr->iov->iov_len -= 4;
+ xdr_truncate_encode(xdr, length_offset);
return nfserr;
}
@@ -3133,7 +3129,8 @@ nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4
int maxcount;
loff_t offset;
struct xdr_stream *xdr = &resp->xdr;
- __be32 *page, *savep, *tailbase;
+ int starting_len = xdr->buf->len;
+ __be32 *page, *tailbase;
__be32 *p;
if (nfserr)
@@ -3144,7 +3141,6 @@ nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4
return nfserr_resource;
RESERVE_SPACE(NFS4_VERIFIER_SIZE);
- savep = p;
/* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
WRITE32(0);
@@ -3206,9 +3202,7 @@ nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4
return 0;
err_no_verf:
- xdr->p = savep;
- xdr->iov->iov_len = ((char *)resp->xdr.p)
- - (char *)resp->xdr.buf->head[0].iov_base;
+ xdr_truncate_encode(xdr, starting_len);
return nfserr;
}
--
1.8.5.3
next prev parent reply other threads:[~2014-03-23 1:12 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-23 1:11 nfsd4 xdr encoding fixes J. Bruce Fields
2014-03-23 1:11 ` [PATCH 01/50] rpc: Allow xdr_buf_subsegment to operate in-place J. Bruce Fields
2014-03-23 1:11 ` [PATCH 02/50] nfsd4: update comments with obsolete function name J. Bruce Fields
2014-03-23 1:11 ` [PATCH 03/50] nfsd4: nfsd4_replay_cache_entry should be static J. Bruce Fields
2014-03-23 1:11 ` [PATCH 04/50] nfsd4: minor nfsd4_replay_cache_entry cleanup J. Bruce Fields
2014-03-23 1:11 ` [PATCH 05/50] nfsd4: use more generous NFS4_ACL_MAX J. Bruce Fields
2014-03-23 1:11 ` [PATCH 06/50] nfsd4: remove redundant check from nfsd4_check_resp_size J. Bruce Fields
2014-03-23 1:11 ` [PATCH 07/50] nfsd4: fix setclientid encode size J. Bruce Fields
2014-03-23 1:11 ` [PATCH 08/50] nfsd4: fix nfs4err_resource in 4.1 case J. Bruce Fields
2014-03-29 19:18 ` J. Bruce Fields
2014-03-23 1:11 ` [PATCH 09/50] nfsd4: embed xdr_stream in nfsd4_compoundres J. Bruce Fields
2014-03-23 1:11 ` [PATCH 10/50] nfsd4: tweak nfsd4_encode_getattr to take xdr_stream J. Bruce Fields
2014-03-23 1:11 ` [PATCH 11/50] nfsd4: move proc_compound xdr encode init to helper J. Bruce Fields
2014-03-23 1:11 ` [PATCH 12/50] nfsd4: reserve head space for krb5 integ/priv info J. Bruce Fields
2014-03-23 1:11 ` [PATCH 13/50] nfsd4: move nfsd4_operation to xdr4.h J. Bruce Fields
2014-03-23 1:11 ` [PATCH 14/50] nfsd4: fix encoding of out-of-space replies J. Bruce Fields
2014-03-23 1:11 ` [PATCH 15/50] nfsd4: allow space for final error return J. Bruce Fields
2014-03-23 1:11 ` [PATCH 16/50] nfsd4: READ, READDIR, etc., are idempotent J. Bruce Fields
2014-03-23 1:11 ` [PATCH 17/50] nfsd4: use xdr_reserve_space in attribute encoding J. Bruce Fields
2014-03-23 1:11 ` [PATCH 18/50] nfsd4: use xdr_stream throughout compound encoding J. Bruce Fields
2014-03-23 6:43 ` Christoph Hellwig
2014-03-23 15:11 ` J. Bruce Fields
2014-03-25 15:38 ` Christoph Hellwig
2014-03-23 1:11 ` [PATCH 19/50] nfsd4: no need for encode_compoundres to adjust lengths J. Bruce Fields
2014-03-23 1:11 ` [PATCH 20/50] nfsd4: keep xdr buf length updated J. Bruce Fields
2014-03-23 6:47 ` Christoph Hellwig
2014-03-23 1:11 ` [PATCH 21/50] rpc: xdr_truncate_encode J. Bruce Fields
2014-03-23 1:11 ` J. Bruce Fields [this message]
2014-03-23 6:50 ` [PATCH 22/50] nfsd4: use xdr_truncate_encode Christoph Hellwig
2014-03-23 15:07 ` J. Bruce Fields
2014-03-25 15:36 ` Christoph Hellwig
2014-04-05 0:20 ` J. Bruce Fields
2014-03-23 1:11 ` [PATCH 23/50] nfsd4: "backfill" using write_bytes_to_xdr_buf J. Bruce Fields
2014-03-23 6:51 ` Christoph Hellwig
2014-03-23 14:43 ` J. Bruce Fields
2014-03-23 14:52 ` Christoph Hellwig
2014-03-23 1:11 ` [PATCH 24/50] nfsd4: remove ADJUST_ARGS J. Bruce Fields
2014-03-23 1:11 ` [PATCH 25/50] nfsd4: teach encoders to handle reserve_space failures J. Bruce Fields
2014-03-23 1:11 ` [PATCH 26/50] nfsd4: reserve space before inlining 0-copy pages J. Bruce Fields
2014-03-23 1:11 ` [PATCH 27/50] nfsd4: nfsd4_check_resp_size needn't recalculate length J. Bruce Fields
2014-03-23 1:11 ` [PATCH 28/50] nfsd4: remove redundant encode buffer size checking J. Bruce Fields
2014-03-23 1:12 ` [PATCH 29/50] nfsd4: size-checking cleanup J. Bruce Fields
2014-03-23 1:12 ` [PATCH 30/50] nfsd4: allow encoding across page boundaries J. Bruce Fields
2014-03-23 1:12 ` [PATCH 31/50] nfsd4: convert 4.1 replay encoding J. Bruce Fields
2014-03-23 1:12 ` [PATCH 32/50] nfsd4: don't try to encode conflicting owner if low on space J. Bruce Fields
2014-03-23 1:12 ` [PATCH 33/50] nfsd4: more precise nfsd4_max_reply J. Bruce Fields
2014-03-23 1:12 ` [PATCH 34/50] nfsd4: minor encode_read cleanup J. Bruce Fields
2014-03-23 1:12 ` [PATCH 35/50] nfsd4: nfsd4_check_resp_size should check against whole buffer J. Bruce Fields
2014-03-23 1:12 ` [PATCH 36/50] nfsd4: allow larger 4.1 session drc slots J. Bruce Fields
2014-03-23 1:12 ` [PATCH 37/50] rpc: define xdr_restrict_buflen J. Bruce Fields
2014-03-23 1:12 ` [PATCH 38/50] nfsd4: adjust buflen to session channel limit J. Bruce Fields
2014-03-23 1:12 ` [PATCH 39/50] nfsd4: use session limits to release send buffer reservation J. Bruce Fields
2014-03-23 1:12 ` [PATCH 40/50] nfsd4: allow large readdirs J. Bruce Fields
2014-03-23 1:12 ` [PATCH 41/50] nfsd4: enforce rd_dircount J. Bruce Fields
2014-03-23 1:12 ` [PATCH 42/50] nfsd4: don't treat readlink like a zero-copy operation J. Bruce Fields
2014-03-23 1:12 ` [PATCH 43/50] nfsd4: turn off zero-copy-read in exotic cases J. Bruce Fields
2014-03-23 1:12 ` [PATCH 44/50] nfsd4: nfsd_vfs_read doesn't use file handle parameter J. Bruce Fields
2014-03-23 1:12 ` [PATCH 45/50] nfsd4: separate splice and readv cases J. Bruce Fields
2014-03-23 1:12 ` [PATCH 46/50] nfsd4: allow exotic read compounds J. Bruce Fields
2014-03-23 1:12 ` [PATCH 47/50] nfsd4: kill WRITE32 J. Bruce Fields
2014-03-23 1:12 ` [PATCH 48/50] nfsd4: kill WRITE64 J. Bruce Fields
2014-03-23 1:12 ` [PATCH 49/50] nfsd4: kill WRITEMEM J. Bruce Fields
2014-03-23 1:12 ` [PATCH 50/50] nfsd4: kill write32, write64 J. Bruce Fields
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