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NFS: Create a common nfs_pgio_result_common function 

Combining these functions will let me make a single nfs_rw_common_ops
struct (see the next patch).

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Anna Schumaker 2014-05-06 09:12:32 -04:00 committed by Trond Myklebust
parent a4cdda5911
commit 0eecb2145c
6 changed files with 54 additions and 50 deletions
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1
fs/nfs/internal.h
View File

@ -243,6 +243,7 @@ struct nfs_pgio_data *nfs_pgio_data_alloc(struct nfs_pgio_header *, unsigned int
void nfs_pgio_data_release(struct nfs_pgio_data *);
void nfs_pgio_prepare(struct rpc_task *, void *);
void nfs_pgio_release(void *);
void nfs_pgio_result(struct rpc_task *, void *);
static inline void nfs_iocounter_init(struct nfs_io_counter *c)
{

23
fs/nfs/pagelist.c
View File

@ -24,6 +24,8 @@
#include "internal.h"
#include "pnfs.h"
#define NFSDBG_FACILITY NFSDBG_PAGECACHE
static struct kmem_cache *nfs_page_cachep;
static bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount)
@ -447,6 +449,27 @@ void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
}
EXPORT_SYMBOL_GPL(nfs_pageio_init);
/**
* nfs_pgio_result - Basic pageio error handling
* @task: The task that ran
* @calldata: Pageio data to check
*/
void nfs_pgio_result(struct rpc_task *task, void *calldata)
{
struct nfs_pgio_data *data = calldata;
struct inode *inode = data->header->inode;
dprintk("NFS: %s: %5u, (status %d)\n", __func__,
task->tk_pid, task->tk_status);
if (data->header->rw_ops->rw_done(task, data, inode) != 0)
return;
if (task->tk_status < 0)
nfs_set_pgio_error(data->header, task->tk_status, data->args.offset);
else
data->header->rw_ops->rw_result(task, data);
}
static bool nfs_match_open_context(const struct nfs_open_context *ctx1,
const struct nfs_open_context *ctx2)
{

25
fs/nfs/read.c
View File

@ -388,15 +388,10 @@ static const struct nfs_pageio_ops nfs_pageio_read_ops = {
* This is the callback from RPC telling us whether a reply was
* received or some error occurred (timeout or socket shutdown).
*/
int nfs_readpage_result(struct rpc_task *task, struct nfs_pgio_data *data)
static int nfs_readpage_done(struct rpc_task *task, struct nfs_pgio_data *data,
struct inode *inode)
{
struct inode *inode = data->header->inode;
int status;
dprintk("NFS: %s: %5u, (status %d)\n", __func__, task->tk_pid,
task->tk_status);
status = NFS_PROTO(inode)->read_done(task, data);
int status = NFS_PROTO(inode)->read_done(task, data);
if (status != 0)
return status;
@ -429,17 +424,11 @@ static void nfs_readpage_retry(struct rpc_task *task, struct nfs_pgio_data *data
rpc_restart_call_prepare(task);
}
static void nfs_readpage_result_common(struct rpc_task *task, void *calldata)
static void nfs_readpage_result(struct rpc_task *task, struct nfs_pgio_data *data)
{
struct nfs_pgio_data *data = calldata;
struct nfs_pgio_header *hdr = data->header;
/* Note the only returns of nfs_readpage_result are 0 and -EAGAIN */
if (nfs_readpage_result(task, data) != 0)
return;
if (task->tk_status < 0)
nfs_set_pgio_error(hdr, task->tk_status, data->args.offset);
else if (data->res.eof) {
if (data->res.eof) {
loff_t bound;
bound = data->args.offset + data->res.count;
@ -456,7 +445,7 @@ static void nfs_readpage_result_common(struct rpc_task *task, void *calldata)
static const struct rpc_call_ops nfs_read_common_ops = {
.rpc_call_prepare = nfs_pgio_prepare,
.rpc_call_done = nfs_readpage_result_common,
.rpc_call_done = nfs_pgio_result,
.rpc_release = nfs_pgio_release,
};
@ -625,4 +614,6 @@ static const struct nfs_rw_ops nfs_rw_read_ops = {
.rw_mode = FMODE_READ,
.rw_alloc_header = nfs_readhdr_alloc,
.rw_free_header = nfs_readhdr_free,
.rw_done = nfs_readpage_done,
.rw_result = nfs_readpage_result,
};

51
fs/nfs/write.c
View File

@ -1255,20 +1255,6 @@ void nfs_commit_prepare(struct rpc_task *task, void *calldata)
NFS_PROTO(data->inode)->commit_rpc_prepare(task, data);
}
/*
* Handle a write reply that flushes a whole page.
*
* FIXME: There is an inherent race with invalidate_inode_pages and
* writebacks since the page->count is kept > 1 for as long
* as the page has a write request pending.
*/
static void nfs_writeback_done_common(struct rpc_task *task, void *calldata)
{
struct nfs_pgio_data *data = calldata;
nfs_writeback_done(task, data);
}
static void nfs_writeback_release_common(struct nfs_pgio_data *data)
{
struct nfs_pgio_header *hdr = data->header;
@ -1288,7 +1274,7 @@ static void nfs_writeback_release_common(struct nfs_pgio_data *data)
static const struct rpc_call_ops nfs_write_common_ops = {
.rpc_call_prepare = nfs_pgio_prepare,
.rpc_call_done = nfs_writeback_done_common,
.rpc_call_done = nfs_pgio_result,
.rpc_release = nfs_pgio_release,
};
@ -1320,16 +1306,11 @@ static int nfs_should_remove_suid(const struct inode *inode)
/*
* This function is called when the WRITE call is complete.
*/
void nfs_writeback_done(struct rpc_task *task, struct nfs_pgio_data *data)
static int nfs_writeback_done(struct rpc_task *task, struct nfs_pgio_data *data,
struct inode *inode)
{
struct nfs_pgio_args *argp = &data->args;
struct nfs_pgio_res *resp = &data->res;
struct inode *inode = data->header->inode;
int status;
dprintk("NFS: %5u nfs_writeback_done (status %d)\n",
task->tk_pid, task->tk_status);
/*
* ->write_done will attempt to use post-op attributes to detect
* conflicting writes by other clients. A strict interpretation
@ -1339,11 +1320,11 @@ void nfs_writeback_done(struct rpc_task *task, struct nfs_pgio_data *data)
*/
status = NFS_PROTO(inode)->write_done(task, data);
if (status != 0)
return;
nfs_add_stats(inode, NFSIOS_SERVERWRITTENBYTES, resp->count);
return status;
nfs_add_stats(inode, NFSIOS_SERVERWRITTENBYTES, data->res.count);
#if IS_ENABLED(CONFIG_NFS_V3) || IS_ENABLED(CONFIG_NFS_V4)
if (resp->verf->committed < argp->stable && task->tk_status >= 0) {
if (data->res.verf->committed < data->args.stable && task->tk_status >= 0) {
/* We tried a write call, but the server did not
* commit data to stable storage even though we
* requested it.
@ -1359,25 +1340,31 @@ void nfs_writeback_done(struct rpc_task *task, struct nfs_pgio_data *data)
dprintk("NFS: faulty NFS server %s:"
" (committed = %d) != (stable = %d)\n",
NFS_SERVER(inode)->nfs_client->cl_hostname,
resp->verf->committed, argp->stable);
data->res.verf->committed, data->args.stable);
complain = jiffies + 300 * HZ;
}
}
#endif
if (task->tk_status < 0) {
nfs_set_pgio_error(data->header, task->tk_status, argp->offset);
return;
}
/* Deal with the suid/sgid bit corner case */
if (nfs_should_remove_suid(inode))
nfs_mark_for_revalidate(inode);
return 0;
}
/*
* This function is called when the WRITE call is complete.
*/
static void nfs_writeback_result(struct rpc_task *task, struct nfs_pgio_data *data)
{
struct nfs_pgio_args *argp = &data->args;
struct nfs_pgio_res *resp = &data->res;
if (resp->count < argp->count) {
static unsigned long complain;
/* This a short write! */
nfs_inc_stats(inode, NFSIOS_SHORTWRITE);
nfs_inc_stats(data->header->inode, NFSIOS_SHORTWRITE);
/* Has the server at least made some progress? */
if (resp->count == 0) {
@ -1911,4 +1898,6 @@ static const struct nfs_rw_ops nfs_rw_write_ops = {
.rw_alloc_header = nfs_writehdr_alloc,
.rw_free_header = nfs_writehdr_free,
.rw_release = nfs_writeback_release_common,
.rw_done = nfs_writeback_done,
.rw_result = nfs_writeback_result,
};

2
include/linux/nfs_fs.h
View File

@ -520,7 +520,6 @@ extern int nfs_writepage(struct page *page, struct writeback_control *wbc);
extern int nfs_writepages(struct address_space *, struct writeback_control *);
extern int nfs_flush_incompatible(struct file *file, struct page *page);
extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int);
extern void nfs_writeback_done(struct rpc_task *, struct nfs_pgio_data *);
/*
* Try to write back everything synchronously (but check the
@ -553,7 +552,6 @@ nfs_have_writebacks(struct inode *inode)
extern int nfs_readpage(struct file *, struct page *);
extern int nfs_readpages(struct file *, struct address_space *,
struct list_head *, unsigned);
extern int nfs_readpage_result(struct rpc_task *, struct nfs_pgio_data *);
extern int nfs_readpage_async(struct nfs_open_context *, struct inode *,
struct page *);

2
include/linux/nfs_page.h
View File

@ -57,6 +57,8 @@ struct nfs_rw_ops {
struct nfs_rw_header *(*rw_alloc_header)(void);
void (*rw_free_header)(struct nfs_rw_header *);
void (*rw_release)(struct nfs_pgio_data *);
int (*rw_done)(struct rpc_task *, struct nfs_pgio_data *, struct inode *);
void (*rw_result)(struct rpc_task *, struct nfs_pgio_data *);
};
struct nfs_pageio_descriptor {