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Thanks to Vasily Averin for fixing a use-after-free in the containerized

Browse source 
NFSv4.2 client, and cleaning up some convoluted backchannel server code
 in the process.  Otherwise, miscellaneous smaller bugfixes and cleanup.
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Merge tag 'nfsd-4.21' of git://linux-nfs.org/~bfields/linux

Pull nfsd updates from Bruce Fields:
 "Thanks to Vasily Averin for fixing a use-after-free in the
  containerized NFSv4.2 client, and cleaning up some convoluted
  backchannel server code in the process.

  Otherwise, miscellaneous smaller bugfixes and cleanup"

* tag 'nfsd-4.21' of git://linux-nfs.org/~bfields/linux: (25 commits)
  nfs: fixed broken compilation in nfs_callback_up_net()
  nfs: minor typo in nfs4_callback_up_net()
  sunrpc: fix debug message in svc_create_xprt()
  sunrpc: make visible processing error in bc_svc_process()
  sunrpc: remove unused xpo_prep_reply_hdr callback
  sunrpc: remove svc_rdma_bc_class
  sunrpc: remove svc_tcp_bc_class
  sunrpc: remove unused bc_up operation from rpc_xprt_ops
  sunrpc: replace svc_serv->sv_bc_xprt by boolean flag
  sunrpc: use-after-free in svc_process_common()
  sunrpc: use SVC_NET() in svcauth_gss_* functions
  nfsd: drop useless LIST_HEAD
  lockd: Show pid of lockd for remote locks
  NFSD remove OP_CACHEME from 4.2 op_flags
  nfsd: Return EPERM, not EACCES, in some SETATTR cases
  sunrpc: fix cache_head leak due to queued request
  nfsd: clean up indentation, increase indentation in switch statement
  svcrdma: Optimize the logic that selects the R_key to invalidate
  nfsd: fix a warning in __cld_pipe_upcall()
  nfsd4: fix crash on writing v4_end_grace before nfsd startup
  ...
This commit is contained in:
Linus Torvalds 2019-01-02 16:21:50 -08:00
commit e45428a436
31 changed files with 192 additions and 360 deletions
Download patch file Download diff file Expand all files Collapse all files

19
include/linux/sunrpc/bc_xprt.h
View file

@ -47,11 +47,14 @@ void xprt_free_bc_rqst(struct rpc_rqst *req);
/*
* Determine if a shared backchannel is in use
*/
static inline int svc_is_backchannel(const struct svc_rqst *rqstp)
static inline bool svc_is_backchannel(const struct svc_rqst *rqstp)
{
if (rqstp->rq_server->sv_bc_xprt)
return 1;
return 0;
return rqstp->rq_server->sv_bc_enabled;
}
static inline void set_bc_enabled(struct svc_serv *serv)
{
serv->sv_bc_enabled = true;
}
#else /* CONFIG_SUNRPC_BACKCHANNEL */
static inline int xprt_setup_backchannel(struct rpc_xprt *xprt,
@ -60,9 +63,13 @@ static inline int xprt_setup_backchannel(struct rpc_xprt *xprt,
return 0;
}
static inline int svc_is_backchannel(const struct svc_rqst *rqstp)
static inline bool svc_is_backchannel(const struct svc_rqst *rqstp)
{
return false;
}
static inline void set_bc_enabled(struct svc_serv *serv)
{
return 0;
}
static inline void xprt_free_bc_request(struct rpc_rqst *req)

7
include/linux/sunrpc/svc.h
View file

@ -109,7 +109,7 @@ struct svc_serv {
spinlock_t sv_cb_lock; /* protects the svc_cb_list */
wait_queue_head_t sv_cb_waitq; /* sleep here if there are no
* entries in the svc_cb_list */
struct svc_xprt *sv_bc_xprt; /* callback on fore channel */
bool sv_bc_enabled; /* service uses backchannel */
#endif /* CONFIG_SUNRPC_BACKCHANNEL */
};
@ -295,9 +295,12 @@ struct svc_rqst {
struct svc_cacherep * rq_cacherep; /* cache info */
struct task_struct *rq_task; /* service thread */
spinlock_t rq_lock; /* per-request lock */
struct net *rq_bc_net; /* pointer to backchannel's
* net namespace
*/
};
#define SVC_NET(svc_rqst) (svc_rqst->rq_xprt->xpt_net)
#define SVC_NET(rqst) (rqst->rq_xprt ? rqst->rq_xprt->xpt_net : rqst->rq_bc_net)
/*
* Rigorous type checking on sockaddr type conversions

2
include/linux/sunrpc/svc_rdma.h
View file

@ -135,6 +135,7 @@ struct svc_rdma_recv_ctxt {
u32 rc_byte_len;
unsigned int rc_page_count;
unsigned int rc_hdr_count;
u32 rc_inv_rkey;
struct page *rc_pages[RPCSVC_MAXPAGES];
};
@ -192,7 +193,6 @@ extern int svc_rdma_sendto(struct svc_rqst *);
extern int svc_rdma_create_listen(struct svc_serv *, int, struct sockaddr *);
extern void svc_sq_reap(struct svcxprt_rdma *);
extern void svc_rq_reap(struct svcxprt_rdma *);
extern void svc_rdma_prep_reply_hdr(struct svc_rqst *);
extern struct svc_xprt_class svc_rdma_class;
#ifdef CONFIG_SUNRPC_BACKCHANNEL

1
include/linux/sunrpc/svc_xprt.h
View file

@ -20,7 +20,6 @@ struct svc_xprt_ops {
struct svc_xprt *(*xpo_accept)(struct svc_xprt *);
int (*xpo_has_wspace)(struct svc_xprt *);
int (*xpo_recvfrom)(struct svc_rqst *);
void (*xpo_prep_reply_hdr)(struct svc_rqst *);
int (*xpo_sendto)(struct svc_rqst *);
void (*xpo_release_rqst)(struct svc_rqst *);
void (*xpo_detach)(struct svc_xprt *);

1
include/linux/sunrpc/xprt.h
View file

@ -157,7 +157,6 @@ struct rpc_xprt_ops {
void (*inject_disconnect)(struct rpc_xprt *xprt);
int (*bc_setup)(struct rpc_xprt *xprt,
unsigned int min_reqs);
int (*bc_up)(struct svc_serv *serv, struct net *net);
size_t (*bc_maxpayload)(struct rpc_xprt *xprt);
void (*bc_free_rqst)(struct rpc_rqst *rqst);
void (*bc_destroy)(struct rpc_xprt *xprt,