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nfsd4: cleanup: replace rq_resused count by rq_next_page pointer

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It may be a matter of personal taste, but I find this makes the code
clearer.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
J. Bruce Fields
2012-12-10 18:01:37 -05:00
parent 79f77bf9a4
commit afc59400d6
12 changed files with 61 additions and 59 deletions
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33
fs/nfsd/nfs3xdr.c
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@@ -325,7 +325,7 @@ nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p,
struct nfsd3_readargs *args)
{
unsigned int len;
int v,pn;
int v;
u32 max_blocksize = svc_max_payload(rqstp);
if (!(p = decode_fh(p, &args->fh)))
@@ -340,8 +340,9 @@ nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p,
/* set up the kvec */
v=0;
while (len > 0) {
pn = rqstp->rq_resused++;
rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_respages[pn]);
struct page *p = *(rqstp->rq_next_page++);
rqstp->rq_vec[v].iov_base = page_address(p);
rqstp->rq_vec[v].iov_len = len < PAGE_SIZE? len : PAGE_SIZE;
len -= rqstp->rq_vec[v].iov_len;
v++;
@@ -463,8 +464,7 @@ nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p,
len = ntohl(*p++);
if (len == 0 || len > NFS3_MAXPATHLEN || len >= PAGE_SIZE)
return 0;
args->tname = new =
page_address(rqstp->rq_respages[rqstp->rq_resused++]);
args->tname = new = page_address(*(rqstp->rq_next_page++));
args->tlen = len;
/* first copy and check from the first page */
old = (char*)p;
@@ -535,8 +535,7 @@ nfs3svc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p,
{
if (!(p = decode_fh(p, &args->fh)))
return 0;
args->buffer =
page_address(rqstp->rq_respages[rqstp->rq_resused++]);
args->buffer = page_address(*(rqstp->rq_next_page++));
return xdr_argsize_check(rqstp, p);
}
@@ -567,8 +566,7 @@ nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p,
if (args->count > PAGE_SIZE)
args->count = PAGE_SIZE;
args->buffer =
page_address(rqstp->rq_respages[rqstp->rq_resused++]);
args->buffer = page_address(*(rqstp->rq_next_page++));
return xdr_argsize_check(rqstp, p);
}
@@ -577,7 +575,7 @@ int
nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p,
struct nfsd3_readdirargs *args)
{
int len, pn;
int len;
u32 max_blocksize = svc_max_payload(rqstp);
if (!(p = decode_fh(p, &args->fh)))
@@ -592,9 +590,9 @@ nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p,
args->count = len;
while (len > 0) {
pn = rqstp->rq_resused++;
struct page *p = *(rqstp->rq_next_page++);
if (!args->buffer)
args->buffer = page_address(rqstp->rq_respages[pn]);
args->buffer = page_address(p);
len -= PAGE_SIZE;
}
@@ -880,7 +878,7 @@ encode_entry(struct readdir_cd *ccd, const char *name, int namlen,
common);
__be32 *p = cd->buffer;
caddr_t curr_page_addr = NULL;
int pn; /* current page number */
struct page ** page;
int slen; /* string (name) length */
int elen; /* estimated entry length in words */
int num_entry_words = 0; /* actual number of words */
@@ -917,8 +915,9 @@ encode_entry(struct readdir_cd *ccd, const char *name, int namlen,
}
/* determine which page in rq_respages[] we are currently filling */
for (pn=1; pn < cd->rqstp->rq_resused; pn++) {
curr_page_addr = page_address(cd->rqstp->rq_respages[pn]);
for (page = cd->rqstp->rq_respages + 1;
page < cd->rqstp->rq_next_page; page++) {
curr_page_addr = page_address(*page);
if (((caddr_t)cd->buffer >= curr_page_addr) &&
((caddr_t)cd->buffer < curr_page_addr + PAGE_SIZE))
@@ -933,14 +932,14 @@ encode_entry(struct readdir_cd *ccd, const char *name, int namlen,
if (plus)
p = encode_entryplus_baggage(cd, p, name, namlen);
num_entry_words = p - cd->buffer;
} else if (cd->rqstp->rq_respages[pn+1] != NULL) {
} else if (*(page+1) != NULL) {
/* temporarily encode entry into next page, then move back to
* current and next page in rq_respages[] */
__be32 *p1, *tmp;
int len1, len2;
/* grab next page for temporary storage of entry */
p1 = tmp = page_address(cd->rqstp->rq_respages[pn+1]);
p1 = tmp = page_address(*(page+1));
p1 = encode_entry_baggage(cd, p1, name, namlen, ino);