diff options
| -rw-r--r-- | net/sunrpc/backchannel_rqst.c | 95 |
1 files changed, 55 insertions, 40 deletions
diff --git a/net/sunrpc/backchannel_rqst.c b/net/sunrpc/backchannel_rqst.c index 28504dfd3dad..1baa41099469 100644 --- a/net/sunrpc/backchannel_rqst.c +++ b/net/sunrpc/backchannel_rqst.c @@ -67,6 +67,55 @@ static void xprt_free_allocation(struct rpc_rqst *req) kfree(req); } +static int xprt_alloc_xdr_buf(struct xdr_buf *buf, gfp_t gfp_flags) +{ + struct page *page; + /* Preallocate one XDR receive buffer */ + page = alloc_page(gfp_flags); + if (page == NULL) + return -ENOMEM; + buf->head[0].iov_base = page_address(page); + buf->head[0].iov_len = PAGE_SIZE; + buf->tail[0].iov_base = NULL; + buf->tail[0].iov_len = 0; + buf->page_len = 0; + buf->len = 0; + buf->buflen = PAGE_SIZE; + return 0; +} + +static +struct rpc_rqst *xprt_alloc_bc_req(struct rpc_xprt *xprt, gfp_t gfp_flags) +{ + struct rpc_rqst *req; + + /* Pre-allocate one backchannel rpc_rqst */ + req = kzalloc(sizeof(*req), gfp_flags); + if (req == NULL) + return NULL; + + req->rq_xprt = xprt; + INIT_LIST_HEAD(&req->rq_list); + INIT_LIST_HEAD(&req->rq_bc_list); + + /* Preallocate one XDR receive buffer */ + if (xprt_alloc_xdr_buf(&req->rq_rcv_buf, gfp_flags) < 0) { + printk(KERN_ERR "Failed to create bc receive xbuf\n"); + goto out_free; + } + req->rq_rcv_buf.len = PAGE_SIZE; + + /* Preallocate one XDR send buffer */ + if (xprt_alloc_xdr_buf(&req->rq_snd_buf, gfp_flags) < 0) { + printk(KERN_ERR "Failed to create bc snd xbuf\n"); + goto out_free; + } + return req; +out_free: + xprt_free_allocation(req); + return NULL; +} + /* * Preallocate up to min_reqs structures and related buffers for use * by the backchannel. This function can be called multiple times @@ -87,9 +136,7 @@ static void xprt_free_allocation(struct rpc_rqst *req) */ int xprt_setup_backchannel(struct rpc_xprt *xprt, unsigned int min_reqs) { - struct page *page_rcv = NULL, *page_snd = NULL; - struct xdr_buf *xbufp = NULL; - struct rpc_rqst *req, *tmp; + struct rpc_rqst *req; struct list_head tmp_list; int i; @@ -106,7 +153,7 @@ int xprt_setup_backchannel(struct rpc_xprt *xprt, unsigned int min_reqs) INIT_LIST_HEAD(&tmp_list); for (i = 0; i < min_reqs; i++) { /* Pre-allocate one backchannel rpc_rqst */ - req = kzalloc(sizeof(struct rpc_rqst), GFP_KERNEL); + req = xprt_alloc_bc_req(xprt, GFP_KERNEL); if (req == NULL) { printk(KERN_ERR "Failed to create bc rpc_rqst\n"); goto out_free; @@ -115,41 +162,6 @@ int xprt_setup_backchannel(struct rpc_xprt *xprt, unsigned int min_reqs) /* Add the allocated buffer to the tmp list */ dprintk("RPC: adding req= %p\n", req); list_add(&req->rq_bc_pa_list, &tmp_list); - - req->rq_xprt = xprt; - INIT_LIST_HEAD(&req->rq_list); - INIT_LIST_HEAD(&req->rq_bc_list); - - /* Preallocate one XDR receive buffer */ - page_rcv = alloc_page(GFP_KERNEL); - if (page_rcv == NULL) { - printk(KERN_ERR "Failed to create bc receive xbuf\n"); - goto out_free; - } - xbufp = &req->rq_rcv_buf; - xbufp->head[0].iov_base = page_address(page_rcv); - xbufp->head[0].iov_len = PAGE_SIZE; - xbufp->tail[0].iov_base = NULL; - xbufp->tail[0].iov_len = 0; - xbufp->page_len = 0; - xbufp->len = PAGE_SIZE; - xbufp->buflen = PAGE_SIZE; - - /* Preallocate one XDR send buffer */ - page_snd = alloc_page(GFP_KERNEL); - if (page_snd == NULL) { - printk(KERN_ERR "Failed to create bc snd xbuf\n"); - goto out_free; - } - - xbufp = &req->rq_snd_buf; - xbufp->head[0].iov_base = page_address(page_snd); - xbufp->head[0].iov_len = 0; - xbufp->tail[0].iov_base = NULL; - xbufp->tail[0].iov_len = 0; - xbufp->page_len = 0; - xbufp->len = 0; - xbufp->buflen = PAGE_SIZE; } /* @@ -167,7 +179,10 @@ out_free: /* * Memory allocation failed, free the temporary list */ - list_for_each_entry_safe(req, tmp, &tmp_list, rq_bc_pa_list) { + while (!list_empty(&tmp_list)) { + req = list_first_entry(&tmp_list, + struct rpc_rqst, + rq_bc_pa_list); list_del(&req->rq_bc_pa_list); xprt_free_allocation(req); } |