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NFSv4.1: shift pnfs_update_layout locations

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Move the pnfs_update_layout call location to nfs_pageio_do_add_request().
Grab the lseg sent in the doio function to nfs_read_rpcsetup and attach
it to each nfs_read_data so it can be sent to the layout driver.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Andy Adamson <andros@citi.umich.edu>
Signed-off-by: Dean Hildebrand <dhildeb@us.ibm.com>
Signed-off-by: Fred Isaman <iisaman@citi.umich.edu>
Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Tao Guo <guotao@nrchpc.ac.cn>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Fred Isaman 2011-03-01 01:34:15 +00:00 committed by Trond Myklebust
parent 94ad1c80e2
commit bae724ef95
8 changed files with 52 additions and 38 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
fs/nfs/file.c
View File

@ -387,10 +387,6 @@ static int nfs_write_begin(struct file *file, struct address_space *mapping,
file->f_path.dentry->d_name.name,
mapping->host->i_ino, len, (long long) pos);
pnfs_update_layout(mapping->host,
nfs_file_open_context(file),
IOMODE_RW);
start:
/*
* Prevent starvation issues if someone is doing a consistency

7
fs/nfs/pagelist.c
View File

@ -20,6 +20,7 @@
#include <linux/nfs_mount.h>
#include "internal.h"
#include "pnfs.h"
static struct kmem_cache *nfs_page_cachep;
@ -213,7 +214,7 @@ nfs_wait_on_request(struct nfs_page *req)
*/
void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
struct inode *inode,
int (*doio)(struct inode *, struct list_head *, unsigned int, size_t, int),
int (*doio)(struct inode *, struct list_head *, unsigned int, size_t, int, struct pnfs_layout_segment *),
size_t bsize,
int io_flags)
{
@ -315,7 +316,9 @@ static void nfs_pageio_doio(struct nfs_pageio_descriptor *desc)
nfs_page_array_len(desc->pg_base,
desc->pg_count),
desc->pg_count,
desc->pg_ioflags);
desc->pg_ioflags,
desc->pg_lseg);
desc->pg_lseg = NULL;
if (error < 0)
desc->pg_error = error;
else

29
fs/nfs/pnfs.c
View File

@ -245,7 +245,7 @@ put_lseg_common(struct pnfs_layout_segment *lseg)
rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq);
}
static void
void
put_lseg(struct pnfs_layout_segment *lseg)
{
struct inode *inode;
@ -784,7 +784,6 @@ pnfs_update_layout(struct inode *ino,
out:
dprintk("%s end, state 0x%lx lseg %p\n", __func__,
nfsi->layout ? nfsi->layout->plh_flags : -1, lseg);
put_lseg(lseg); /* STUB - callers currently ignore return value */
return lseg;
out_unlock:
spin_unlock(&ino->i_lock);
@ -858,20 +857,26 @@ out_forget_reply:
goto out;
}
static void
pnfs_set_pg_test(struct inode *inode, struct nfs_pageio_descriptor *pgio)
static int pnfs_read_pg_test(struct nfs_pageio_descriptor *pgio,
struct nfs_page *prev,
struct nfs_page *req)
{
if (pgio->pg_count == prev->wb_bytes) {
/* This is first coelesce call for a series of nfs_pages */
pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
prev->wb_context,
IOMODE_READ);
}
return NFS_SERVER(pgio->pg_inode)->pnfs_curr_ld->pg_test(pgio, prev, req);
}
void
pnfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, struct inode *inode)
{
struct pnfs_layoutdriver_type *ld;
ld = NFS_SERVER(inode)->pnfs_curr_ld;
pgio->pg_test = (ld ? ld->pg_test : NULL);
}
void
pnfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
struct inode *inode)
{
pnfs_set_pg_test(inode, pgio);
pgio->pg_test = (ld && ld->pg_test) ? pnfs_read_pg_test : NULL;
}
/*

1
fs/nfs/pnfs.h
View File

@ -151,6 +151,7 @@ extern int nfs4_proc_layoutget(struct nfs4_layoutget *lgp);
/* pnfs.c */
void get_layout_hdr(struct pnfs_layout_hdr *lo);
void put_lseg(struct pnfs_layout_segment *lseg);
struct pnfs_layout_segment *
pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx,
enum pnfs_iomode access_type);

40
fs/nfs/read.c
View File

@ -20,17 +20,17 @@
#include <linux/nfs_page.h>
#include <asm/system.h>
#include "pnfs.h"
#include "nfs4_fs.h"
#include "internal.h"
#include "iostat.h"
#include "fscache.h"
#include "pnfs.h"
#define NFSDBG_FACILITY NFSDBG_PAGECACHE
static int nfs_pagein_multi(struct inode *, struct list_head *, unsigned int, size_t, int);
static int nfs_pagein_one(struct inode *, struct list_head *, unsigned int, size_t, int);
static int nfs_pagein_multi(struct inode *, struct list_head *, unsigned int, size_t, int, struct pnfs_layout_segment *);
static int nfs_pagein_one(struct inode *, struct list_head *, unsigned int, size_t, int, struct pnfs_layout_segment *);
static const struct rpc_call_ops nfs_read_partial_ops;
static const struct rpc_call_ops nfs_read_full_ops;
@ -69,6 +69,7 @@ void nfs_readdata_free(struct nfs_read_data *p)
static void nfs_readdata_release(struct nfs_read_data *rdata)
{
put_lseg(rdata->lseg);
put_nfs_open_context(rdata->args.context);
nfs_readdata_free(rdata);
}
@ -121,7 +122,6 @@ int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode,
len = nfs_page_length(page);
if (len == 0)
return nfs_return_empty_page(page);
pnfs_update_layout(inode, ctx, IOMODE_READ);
new = nfs_create_request(ctx, inode, page, 0, len);
if (IS_ERR(new)) {
unlock_page(page);
@ -132,9 +132,9 @@ int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode,
nfs_list_add_request(new, &one_request);
if (NFS_SERVER(inode)->rsize < PAGE_CACHE_SIZE)
nfs_pagein_multi(inode, &one_request, 1, len, 0);
nfs_pagein_multi(inode, &one_request, 1, len, 0, NULL);
else
nfs_pagein_one(inode, &one_request, 1, len, 0);
nfs_pagein_one(inode, &one_request, 1, len, 0, NULL);
return 0;
}
@ -160,7 +160,8 @@ static void nfs_readpage_release(struct nfs_page *req)
*/
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)
unsigned int count, unsigned int offset,
struct pnfs_layout_segment *lseg)
{
struct inode *inode = req->wb_context->path.dentry->d_inode;
int swap_flags = IS_SWAPFILE(inode) ? NFS_RPC_SWAPFLAGS : 0;
@ -183,6 +184,7 @@ static int nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
data->req = req;
data->inode = inode;
data->cred = msg.rpc_cred;
data->lseg = get_lseg(lseg);
data->args.fh = NFS_FH(inode);
data->args.offset = req_offset(req) + offset;
@ -240,7 +242,7 @@ nfs_async_read_error(struct list_head *head)
* won't see the new data until our attribute cache is updated. This is more
* or less conventional NFS client behavior.
*/
static int nfs_pagein_multi(struct inode *inode, struct list_head *head, unsigned int npages, size_t count, int flags)
static int nfs_pagein_multi(struct inode *inode, struct list_head *head, unsigned int npages, size_t count, int flags, struct pnfs_layout_segment *lseg)
{
struct nfs_page *req = nfs_list_entry(head->next);
struct page *page = req->wb_page;
@ -266,6 +268,8 @@ static int nfs_pagein_multi(struct inode *inode, struct list_head *head, unsigne
} while(nbytes != 0);
atomic_set(&req->wb_complete, requests);
/* We know lseg==NULL */
lseg = pnfs_update_layout(inode, req->wb_context, IOMODE_READ);
ClearPageError(page);
offset = 0;
nbytes = count;
@ -280,12 +284,13 @@ static int nfs_pagein_multi(struct inode *inode, struct list_head *head, unsigne
if (nbytes < rsize)
rsize = nbytes;
ret2 = nfs_read_rpcsetup(req, data, &nfs_read_partial_ops,
rsize, offset);
rsize, offset, lseg);
if (ret == 0)
ret = ret2;
offset += rsize;
nbytes -= rsize;
} while (nbytes != 0);
put_lseg(lseg);
return ret;
@ -300,7 +305,7 @@ out_bad:
return -ENOMEM;
}
static int nfs_pagein_one(struct inode *inode, struct list_head *head, unsigned int npages, size_t count, int flags)
static int nfs_pagein_one(struct inode *inode, struct list_head *head, unsigned int npages, size_t count, int flags, struct pnfs_layout_segment *lseg)
{
struct nfs_page *req;
struct page **pages;
@ -308,8 +313,10 @@ static int nfs_pagein_one(struct inode *inode, struct list_head *head, unsigned
int ret = -ENOMEM;
data = nfs_readdata_alloc(npages);
if (!data)
goto out_bad;
if (!data) {
nfs_async_read_error(head);
goto out;
}
pages = data->pagevec;
while (!list_empty(head)) {
@ -320,10 +327,12 @@ static int nfs_pagein_one(struct inode *inode, struct list_head *head, unsigned
*pages++ = req->wb_page;
}
req = nfs_list_entry(data->pages.next);
if ((!lseg) && list_is_singular(&data->pages))
lseg = pnfs_update_layout(inode, req->wb_context, IOMODE_READ);
return nfs_read_rpcsetup(req, data, &nfs_read_full_ops, count, 0);
out_bad:
nfs_async_read_error(head);
ret = nfs_read_rpcsetup(req, data, &nfs_read_full_ops, count, 0, lseg);
out:
put_lseg(lseg);
return ret;
}
@ -625,7 +634,6 @@ int nfs_readpages(struct file *filp, struct address_space *mapping,
if (ret == 0)
goto read_complete; /* all pages were read */
pnfs_update_layout(inode, desc.ctx, IOMODE_READ);
pnfs_pageio_init_read(&pgio, inode);
if (rsize < PAGE_CACHE_SIZE)
nfs_pageio_init(&pgio, inode, nfs_pagein_multi, rsize, 0);

4
fs/nfs/write.c
View File

@ -880,7 +880,7 @@ static void nfs_redirty_request(struct nfs_page *req)
* Generate multiple small requests to write out a single
* contiguous dirty area on one page.
*/
static int nfs_flush_multi(struct inode *inode, struct list_head *head, unsigned int npages, size_t count, int how)
static int nfs_flush_multi(struct inode *inode, struct list_head *head, unsigned int npages, size_t count, int how, struct pnfs_layout_segment *lseg)
{
struct nfs_page *req = nfs_list_entry(head->next);
struct page *page = req->wb_page;
@ -947,7 +947,7 @@ out_bad:
* This is the case if nfs_updatepage detects a conflicting request
* that has been written but not committed.
*/
static int nfs_flush_one(struct inode *inode, struct list_head *head, unsigned int npages, size_t count, int how)
static int nfs_flush_one(struct inode *inode, struct list_head *head, unsigned int npages, size_t count, int how, struct pnfs_layout_segment *lseg)
{
struct nfs_page *req;
struct page **pages;

4
include/linux/nfs_page.h
View File

@ -59,7 +59,7 @@ struct nfs_pageio_descriptor {
unsigned int pg_base;
struct inode *pg_inode;
int (*pg_doio)(struct inode *, struct list_head *, unsigned int, size_t, int);
int (*pg_doio)(struct inode *, struct list_head *, unsigned int, size_t, int, struct pnfs_layout_segment *);
int pg_ioflags;
int pg_error;
struct pnfs_layout_segment *pg_lseg;
@ -81,7 +81,7 @@ extern int nfs_scan_list(struct nfs_inode *nfsi, struct list_head *dst,
pgoff_t idx_start, unsigned int npages, int tag);
extern void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
struct inode *inode,
int (*doio)(struct inode *, struct list_head *, unsigned int, size_t, int),
int (*doio)(struct inode *, struct list_head *, unsigned int, size_t, int, struct pnfs_layout_segment *),
size_t bsize,
int how);
extern int nfs_pageio_add_request(struct nfs_pageio_descriptor *,

1
include/linux/nfs_xdr.h
View File

@ -1017,6 +1017,7 @@ struct nfs_read_data {
struct nfs_readargs args;
struct nfs_readres res;
unsigned long timestamp; /* For lease renewal */
struct pnfs_layout_segment *lseg;
struct page *page_array[NFS_PAGEVEC_SIZE];
};