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Diffstat (limited to 'fs/nfs/read.c')
-rw-r--r--fs/nfs/read.c94
1 files changed, 55 insertions, 39 deletions
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index 5a70be589bbe..16f57e0af999 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -58,22 +58,19 @@ struct nfs_read_data *nfs_readdata_alloc(unsigned int pagecount)
return p;
}
-static void nfs_readdata_rcu_free(struct rcu_head *head)
+static void nfs_readdata_free(struct nfs_read_data *p)
{
- struct nfs_read_data *p = container_of(head, struct nfs_read_data, task.u.tk_rcu);
if (p && (p->pagevec != &p->page_array[0]))
kfree(p->pagevec);
mempool_free(p, nfs_rdata_mempool);
}
-static void nfs_readdata_free(struct nfs_read_data *rdata)
-{
- call_rcu_bh(&rdata->task.u.tk_rcu, nfs_readdata_rcu_free);
-}
-
void nfs_readdata_release(void *data)
{
- nfs_readdata_free(data);
+ struct nfs_read_data *rdata = data;
+
+ put_nfs_open_context(rdata->args.context);
+ nfs_readdata_free(rdata);
}
static
@@ -156,7 +153,7 @@ static void nfs_readpage_release(struct nfs_page *req)
/*
* Set up the NFS read request struct
*/
-static void nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
+static int nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
const struct rpc_call_ops *call_ops,
unsigned int count, unsigned int offset)
{
@@ -174,6 +171,7 @@ static void nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
.rpc_message = &msg,
.callback_ops = call_ops,
.callback_data = data,
+ .workqueue = nfsiod_workqueue,
.flags = RPC_TASK_ASYNC | swap_flags,
};
@@ -186,7 +184,7 @@ static void nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
data->args.pgbase = req->wb_pgbase + offset;
data->args.pages = data->pagevec;
data->args.count = count;
- data->args.context = req->wb_context;
+ data->args.context = get_nfs_open_context(req->wb_context);
data->res.fattr = &data->fattr;
data->res.count = count;
@@ -204,8 +202,10 @@ static void nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
(unsigned long long)data->args.offset);
task = rpc_run_task(&task_setup_data);
- if (!IS_ERR(task))
- rpc_put_task(task);
+ if (IS_ERR(task))
+ return PTR_ERR(task);
+ rpc_put_task(task);
+ return 0;
}
static void
@@ -242,6 +242,7 @@ static int nfs_pagein_multi(struct inode *inode, struct list_head *head, unsigne
size_t rsize = NFS_SERVER(inode)->rsize, nbytes;
unsigned int offset;
int requests = 0;
+ int ret = 0;
LIST_HEAD(list);
nfs_list_remove_request(req);
@@ -253,7 +254,6 @@ static int nfs_pagein_multi(struct inode *inode, struct list_head *head, unsigne
data = nfs_readdata_alloc(1);
if (!data)
goto out_bad;
- INIT_LIST_HEAD(&data->pages);
list_add(&data->pages, &list);
requests++;
nbytes -= len;
@@ -264,6 +264,8 @@ static int nfs_pagein_multi(struct inode *inode, struct list_head *head, unsigne
offset = 0;
nbytes = count;
do {
+ int ret2;
+
data = list_entry(list.next, struct nfs_read_data, pages);
list_del_init(&data->pages);
@@ -271,13 +273,15 @@ static int nfs_pagein_multi(struct inode *inode, struct list_head *head, unsigne
if (nbytes < rsize)
rsize = nbytes;
- nfs_read_rpcsetup(req, data, &nfs_read_partial_ops,
+ ret2 = nfs_read_rpcsetup(req, data, &nfs_read_partial_ops,
rsize, offset);
+ if (ret == 0)
+ ret = ret2;
offset += rsize;
nbytes -= rsize;
} while (nbytes != 0);
- return 0;
+ return ret;
out_bad:
while (!list_empty(&list)) {
@@ -295,12 +299,12 @@ static int nfs_pagein_one(struct inode *inode, struct list_head *head, unsigned
struct nfs_page *req;
struct page **pages;
struct nfs_read_data *data;
+ int ret = -ENOMEM;
data = nfs_readdata_alloc(npages);
if (!data)
goto out_bad;
- INIT_LIST_HEAD(&data->pages);
pages = data->pagevec;
while (!list_empty(head)) {
req = nfs_list_entry(head->next);
@@ -311,11 +315,10 @@ static int nfs_pagein_one(struct inode *inode, struct list_head *head, unsigned
}
req = nfs_list_entry(data->pages.next);
- nfs_read_rpcsetup(req, data, &nfs_read_full_ops, count, 0);
- return 0;
+ return nfs_read_rpcsetup(req, data, &nfs_read_full_ops, count, 0);
out_bad:
nfs_async_read_error(head);
- return -ENOMEM;
+ return ret;
}
/*
@@ -342,26 +345,25 @@ int nfs_readpage_result(struct rpc_task *task, struct nfs_read_data *data)
return 0;
}
-static int nfs_readpage_retry(struct rpc_task *task, struct nfs_read_data *data)
+static void nfs_readpage_retry(struct rpc_task *task, struct nfs_read_data *data)
{
struct nfs_readargs *argp = &data->args;
struct nfs_readres *resp = &data->res;
if (resp->eof || resp->count == argp->count)
- return 0;
+ return;
/* This is a short read! */
nfs_inc_stats(data->inode, NFSIOS_SHORTREAD);
/* Has the server at least made some progress? */
if (resp->count == 0)
- return 0;
+ return;
/* Yes, so retry the read at the end of the data */
argp->offset += resp->count;
argp->pgbase += resp->count;
argp->count -= resp->count;
rpc_restart_call(task);
- return -EAGAIN;
}
/*
@@ -370,29 +372,37 @@ static int nfs_readpage_retry(struct rpc_task *task, struct nfs_read_data *data)
static void nfs_readpage_result_partial(struct rpc_task *task, void *calldata)
{
struct nfs_read_data *data = calldata;
- struct nfs_page *req = data->req;
- struct page *page = req->wb_page;
if (nfs_readpage_result(task, data) != 0)
return;
+ if (task->tk_status < 0)
+ return;
- if (likely(task->tk_status >= 0)) {
- nfs_readpage_truncate_uninitialised_page(data);
- if (nfs_readpage_retry(task, data) != 0)
- return;
- }
- if (unlikely(task->tk_status < 0))
+ nfs_readpage_truncate_uninitialised_page(data);
+ nfs_readpage_retry(task, data);
+}
+
+static void nfs_readpage_release_partial(void *calldata)
+{
+ struct nfs_read_data *data = calldata;
+ struct nfs_page *req = data->req;
+ struct page *page = req->wb_page;
+ int status = data->task.tk_status;
+
+ if (status < 0)
SetPageError(page);
+
if (atomic_dec_and_test(&req->wb_complete)) {
if (!PageError(page))
SetPageUptodate(page);
nfs_readpage_release(req);
}
+ nfs_readdata_release(calldata);
}
static const struct rpc_call_ops nfs_read_partial_ops = {
.rpc_call_done = nfs_readpage_result_partial,
- .rpc_release = nfs_readdata_release,
+ .rpc_release = nfs_readpage_release_partial,
};
static void nfs_readpage_set_pages_uptodate(struct nfs_read_data *data)
@@ -427,29 +437,35 @@ static void nfs_readpage_result_full(struct rpc_task *task, void *calldata)
if (nfs_readpage_result(task, data) != 0)
return;
+ if (task->tk_status < 0)
+ return;
/*
* Note: nfs_readpage_retry may change the values of
* data->args. In the multi-page case, we therefore need
* to ensure that we call nfs_readpage_set_pages_uptodate()
* first.
*/
- if (likely(task->tk_status >= 0)) {
- nfs_readpage_truncate_uninitialised_page(data);
- nfs_readpage_set_pages_uptodate(data);
- if (nfs_readpage_retry(task, data) != 0)
- return;
- }
+ nfs_readpage_truncate_uninitialised_page(data);
+ nfs_readpage_set_pages_uptodate(data);
+ nfs_readpage_retry(task, data);
+}
+
+static void nfs_readpage_release_full(void *calldata)
+{
+ struct nfs_read_data *data = calldata;
+
while (!list_empty(&data->pages)) {
struct nfs_page *req = nfs_list_entry(data->pages.next);
nfs_list_remove_request(req);
nfs_readpage_release(req);
}
+ nfs_readdata_release(calldata);
}
static const struct rpc_call_ops nfs_read_full_ops = {
.rpc_call_done = nfs_readpage_result_full,
- .rpc_release = nfs_readdata_release,
+ .rpc_release = nfs_readpage_release_full,
};
/*
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-14 23:12:57 +0000