@@ -157,11 +157,7 @@ nfsd3_proc_read(struct svc_rqst *rqstp, struct nfsd3_readargs *argp,
* 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof)
* + 1 (xdr opaque byte count) = 26
*/
-
- resp->count = argp->count;
- if (max_blocksize < resp->count)
- resp->count = max_blocksize;
-
+ resp->count = min(argp->count, max_blocksize);
svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4);
fh_copy(&resp->fh, &argp->fh);
@@ -120,10 +120,7 @@ decode_sattr3(__be32 *p, struct iattr *iap)
iap->ia_valid |= ATTR_SIZE;
p = xdr_decode_hyper(p, &newsize);
- if (newsize <= NFS_OFFSET_MAX)
- iap->ia_size = newsize;
- else
- iap->ia_size = NFS_OFFSET_MAX;
+ iap->ia_size = min_t(u64, newsize, NFS_OFFSET_MAX);
}
if ((tmp = ntohl(*p++)) == 1) { /* set to server time */
iap->ia_valid |= ATTR_ATIME;
@@ -338,10 +335,8 @@ nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p,
return 0;
p = xdr_decode_hyper(p, &args->offset);
- len = args->count = ntohl(*p++);
-
- if (len > max_blocksize)
- len = max_blocksize;
+ args->count = ntohl(*p++);
+ len = min(args->count, max_blocksize);
/* set up the kvec */
v=0;
@@ -349,7 +344,7 @@ nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p,
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;
+ rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE);
len -= rqstp->rq_vec[v].iov_len;
v++;
}
@@ -484,9 +479,7 @@ nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p,
}
/* now copy next page if there is one */
if (len && !avail && rqstp->rq_arg.page_len) {
- avail = rqstp->rq_arg.page_len;
- if (avail > PAGE_SIZE)
- avail = PAGE_SIZE;
+ avail = min_t(unsigned int, rqstp->rq_arg.page_len, PAGE_SIZE);
old = page_address(rqstp->rq_arg.pages[0]);
}
while (len && avail && *old) {
@@ -571,10 +564,7 @@ nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p,
args->verf = p; p += 2;
args->dircount = ~0;
args->count = ntohl(*p++);
-
- if (args->count > PAGE_SIZE)
- args->count = PAGE_SIZE;
-
+ args->count = min_t(u32, args->count, PAGE_SIZE);
args->buffer = page_address(*(rqstp->rq_next_page++));
return xdr_argsize_check(rqstp, p);
@@ -595,10 +585,7 @@ nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p,
args->dircount = ntohl(*p++);
args->count = ntohl(*p++);
- len = (args->count > max_blocksize) ? max_blocksize :
- args->count;
- args->count = len;
-
+ len = args->count = min(args->count, max_blocksize);
while (len > 0) {
struct page *p = *(rqstp->rq_next_page++);
if (!args->buffer)
@@ -913,8 +900,7 @@ encode_entry(struct readdir_cd *ccd, const char *name, int namlen,
*/
/* truncate filename if too long */
- if (namlen > NFS3_MAXNAMLEN)
- namlen = NFS3_MAXNAMLEN;
+ namlen = min(namlen, NFS3_MAXNAMLEN);
slen = XDR_QUADLEN(namlen);
elen = slen + NFS3_ENTRY_BAGGAGE
@@ -1529,21 +1529,17 @@ static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
u32 maxcount = 0, rlen = 0;
maxcount = svc_max_payload(rqstp);
- rlen = op->u.read.rd_length;
-
- if (rlen > maxcount)
- rlen = maxcount;
+ rlen = min(op->u.read.rd_length, maxcount);
return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
}
static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
{
- u32 maxcount = svc_max_payload(rqstp);
- u32 rlen = op->u.readdir.rd_maxcount;
+ u32 maxcount = 0, rlen = 0;
- if (rlen > maxcount)
- rlen = maxcount;
+ maxcount = svc_max_payload(rqstp);
+ rlen = min(op->u.readdir.rd_maxcount, maxcount);
return (op_encode_hdr_size + op_encode_verifier_maxsz +
XDR_QUADLEN(rlen)) * sizeof(__be32);
@@ -3133,9 +3133,7 @@ static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
len = maxcount;
v = 0;
- thislen = (void *)xdr->end - (void *)xdr->p;
- if (len < thislen)
- thislen = len;
+ thislen = min(len, ((void *)xdr->end - (void *)xdr->p));
p = xdr_reserve_space(xdr, (thislen+3)&~3);
WARN_ON_ONCE(!p);
resp->rqstp->rq_vec[v].iov_base = p;
@@ -3202,10 +3200,8 @@ nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
xdr_commit_encode(xdr);
maxcount = svc_max_payload(resp->rqstp);
- if (maxcount > xdr->buf->buflen - xdr->buf->len)
- maxcount = xdr->buf->buflen - xdr->buf->len;
- if (maxcount > read->rd_length)
- maxcount = read->rd_length;
+ maxcount = min_t(unsigned long, maxcount, (xdr->buf->buflen - xdr->buf->len));
+ maxcount = min_t(unsigned long, maxcount, read->rd_length);
if (!read->rd_filp) {
err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp,
@@ -369,8 +369,7 @@ static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
if (maxsize < NFS_FHSIZE)
return -EINVAL;
- if (maxsize > NFS3_FHSIZE)
- maxsize = NFS3_FHSIZE;
+ maxsize = min(maxsize, NFS3_FHSIZE);
if (qword_get(&mesg, mesg, size)>0)
return -EINVAL;
@@ -871,10 +870,8 @@ static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
/* force bsize into allowed range and
* required alignment.
*/
- if (bsize < 1024)
- bsize = 1024;
- if (bsize > NFSSVC_MAXBLKSIZE)
- bsize = NFSSVC_MAXBLKSIZE;
+ bsize = max_t(int, bsize, 1024);
+ bsize = min_t(int, bsize, NFSSVC_MAXBLKSIZE);
bsize &= ~(1024-1);
mutex_lock(&nfsd_mutex);
if (nn->nfsd_serv) {
@@ -469,8 +469,7 @@ int nfsd_set_nrthreads(int n, int *nthreads, struct net *net)
/* enforce a global maximum number of threads */
tot = 0;
for (i = 0; i < n; i++) {
- if (nthreads[i] > NFSD_MAXSERVS)
- nthreads[i] = NFSD_MAXSERVS;
+ nthreads[i] = min(nthreads[i], NFSD_MAXSERVS);
tot += nthreads[i];
}
if (tot > NFSD_MAXSERVS) {
@@ -519,11 +518,11 @@ nfsd_svc(int nrservs, struct net *net)
mutex_lock(&nfsd_mutex);
dprintk("nfsd: creating service\n");
- if (nrservs <= 0)
- nrservs = 0;
- if (nrservs > NFSD_MAXSERVS)
- nrservs = NFSD_MAXSERVS;
+
+ nrservs = max(nrservs, 0);
+ nrservs = min(nrservs, NFSD_MAXSERVS);
error = 0;
+
if (nrservs == 0 && nn->nfsd_serv == NULL)
goto out;
@@ -257,8 +257,7 @@ nfssvc_decode_readargs(struct svc_rqst *rqstp, __be32 *p,
len = args->count = ntohl(*p++);
p++; /* totalcount - unused */
- if (len > NFSSVC_MAXBLKSIZE_V2)
- len = NFSSVC_MAXBLKSIZE_V2;
+ len = min_t(unsigned int, len, NFSSVC_MAXBLKSIZE_V2);
/* set up somewhere to store response.
* We take pages, put them on reslist and include in iovec
@@ -268,7 +267,7 @@ nfssvc_decode_readargs(struct svc_rqst *rqstp, __be32 *p,
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;
+ rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE);
len -= rqstp->rq_vec[v].iov_len;
v++;
}
@@ -400,9 +399,7 @@ nfssvc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p,
return 0;
args->cookie = ntohl(*p++);
args->count = ntohl(*p++);
- if (args->count > PAGE_SIZE)
- args->count = PAGE_SIZE;
-
+ args->count = min_t(u32, args->count, PAGE_SIZE);
args->buffer = page_address(*(rqstp->rq_next_page++));
return xdr_argsize_check(rqstp, p);
@@ -516,10 +513,11 @@ nfssvc_encode_entry(void *ccdv, const char *name,
}
if (cd->offset)
*cd->offset = htonl(offset);
- if (namlen > NFS2_MAXNAMLEN)
- namlen = NFS2_MAXNAMLEN;/* truncate filename */
+ /* truncate filename */
+ namlen = min(namlen, NFS2_MAXNAMLEN);
slen = XDR_QUADLEN(namlen);
+
if ((buflen = cd->buflen - slen - 4) < 0) {
cd->common.err = nfserr_toosmall;
return -EINVAL;
@@ -2093,8 +2093,7 @@ nfsd_racache_init(int cache_size)
if (raparm_hash[0].pb_head)
return 0;
nperbucket = DIV_ROUND_UP(cache_size, RAPARM_HASH_SIZE);
- if (nperbucket < 2)
- nperbucket = 2;
+ nperbucket = max(2, nperbucket);
cache_size = nperbucket * RAPARM_HASH_SIZE;
dprintk("nfsd: allocating %d readahead buffers.\n", cache_size);
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com> --- fs/nfsd/nfs3proc.c | 6 +----- fs/nfsd/nfs3xdr.c | 30 ++++++++---------------------- fs/nfsd/nfs4proc.c | 12 ++++-------- fs/nfsd/nfs4xdr.c | 10 +++------- fs/nfsd/nfsctl.c | 9 +++------ fs/nfsd/nfssvc.c | 11 +++++------ fs/nfsd/nfsxdr.c | 14 ++++++-------- fs/nfsd/vfs.c | 3 +-- 8 files changed, 31 insertions(+), 64 deletions(-)