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sunrpc: add a generic rq_flags field to svc_rqst and move rq_secure to it

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In a later patch, we're going to need some atomic bit flags. Since that
field will need to be an unsigned long, we mitigate that space
consumption by migrating some other bitflags to the new field. Start
with the rq_secure flag.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Jeff Layton 2014-11-19 07:51:14 -05:00 committed by J. Bruce Fields
parent 2941b0e91b
commit 4d152e2c9a
5 changed files with 22 additions and 10 deletions
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4
fs/nfsd/nfscache.c
View File

@ -490,7 +490,7 @@ found_entry:
/* From the hall of fame of impractical attacks:
* Is this a user who tries to snoop on the cache? */
rtn = RC_DOIT;
if (!rqstp->rq_secure && rp->c_secure)
if (!test_bit(RQ_SECURE, &rqstp->rq_flags) && rp->c_secure)
goto out;
/* Compose RPC reply header */
@ -579,7 +579,7 @@ nfsd_cache_update(struct svc_rqst *rqstp, int cachetype, __be32 *statp)
spin_lock(&b->cache_lock);
drc_mem_usage += bufsize;
lru_put_end(b, rp);
rp->c_secure = rqstp->rq_secure;
rp->c_secure = test_bit(RQ_SECURE, &rqstp->rq_flags);
rp->c_type = cachetype;
rp->c_state = RC_DONE;
spin_unlock(&b->cache_lock);

2
fs/nfsd/nfsfh.c
View File

@ -86,7 +86,7 @@ static __be32 nfsd_setuser_and_check_port(struct svc_rqst *rqstp,
int flags = nfsexp_flags(rqstp, exp);
/* Check if the request originated from a secure port. */
if (!rqstp->rq_secure && !(flags & NFSEXP_INSECURE_PORT)) {
if (!test_bit(RQ_SECURE, &rqstp->rq_flags) && !(flags & NFSEXP_INSECURE_PORT)) {
RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
dprintk("nfsd: request from insecure port %s!\n",
svc_print_addr(rqstp, buf, sizeof(buf)));

4
include/linux/sunrpc/svc.h
View File

@ -253,8 +253,8 @@ struct svc_rqst {
u32 rq_vers; /* program version */
u32 rq_proc; /* procedure number */
u32 rq_prot; /* IP protocol */
unsigned short
rq_secure : 1; /* secure port */
#define RQ_SECURE (0) /* secure port */
unsigned long rq_flags; /* flags field */
unsigned short rq_local : 1; /* local request */
void * rq_argp; /* decoded arguments */

17
include/trace/events/sunrpc.h
View File

@ -412,6 +412,10 @@ TRACE_EVENT(xs_tcp_data_recv,
__entry->copied, __entry->reclen, __entry->offset)
);
#define show_rqstp_flags(flags) \
__print_flags(flags, "|", \
{ (1UL << RQ_SECURE), "RQ_SECURE"})
TRACE_EVENT(svc_recv,
TP_PROTO(struct svc_rqst *rqst, int status),
@ -421,16 +425,19 @@ TRACE_EVENT(svc_recv,
__field(struct sockaddr *, addr)
__field(__be32, xid)
__field(int, status)
__field(unsigned long, flags)
),
TP_fast_assign(
__entry->addr = (struct sockaddr *)&rqst->rq_addr;
__entry->xid = status > 0 ? rqst->rq_xid : 0;
__entry->status = status;
__entry->flags = rqst->rq_flags;
),
TP_printk("addr=%pIScp xid=0x%x status=%d", __entry->addr,
be32_to_cpu(__entry->xid), __entry->status)
TP_printk("addr=%pIScp xid=0x%x status=%d flags=%s", __entry->addr,
be32_to_cpu(__entry->xid), __entry->status,
show_rqstp_flags(__entry->flags))
);
DECLARE_EVENT_CLASS(svc_rqst_status,
@ -444,6 +451,7 @@ DECLARE_EVENT_CLASS(svc_rqst_status,
__field(__be32, xid)
__field(int, dropme)
__field(int, status)
__field(unsigned long, flags)
),
TP_fast_assign(
@ -451,11 +459,12 @@ DECLARE_EVENT_CLASS(svc_rqst_status,
__entry->xid = rqst->rq_xid;
__entry->dropme = (int)rqst->rq_dropme;
__entry->status = status;
__entry->flags = rqst->rq_flags;
),
TP_printk("addr=%pIScp rq_xid=0x%x dropme=%d status=%d",
TP_printk("addr=%pIScp rq_xid=0x%x dropme=%d status=%d flags=%s",
__entry->addr, be32_to_cpu(__entry->xid), __entry->dropme,
__entry->status)
__entry->status, show_rqstp_flags(__entry->flags))
);
DEFINE_EVENT(svc_rqst_status, svc_process,

5
net/sunrpc/svc_xprt.c
View File

@ -797,7 +797,10 @@ int svc_recv(struct svc_rqst *rqstp, long timeout)
clear_bit(XPT_OLD, &xprt->xpt_flags);
rqstp->rq_secure = xprt->xpt_ops->xpo_secure_port(rqstp);
if (xprt->xpt_ops->xpo_secure_port(rqstp))
set_bit(RQ_SECURE, &rqstp->rq_flags);
else
clear_bit(RQ_SECURE, &rqstp->rq_flags);
rqstp->rq_chandle.defer = svc_defer;
rqstp->rq_xid = svc_getu32(&rqstp->rq_arg.head[0]);