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NFS: Move the pnfs write code into pnfs.c

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...and ensure that we recoalese to take into account differences in
differences in block sizes when falling back to write through the MDS.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2011-07-13 15:59:19 -04:00
parent 493292ddc7
commit dce81290ee
7 changed files with 80 additions and 37 deletions
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4
fs/nfs/internal.h
View File

@ -305,8 +305,12 @@ extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
extern void nfs_readdata_release(struct nfs_read_data *rdata);
/* write.c */
extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc,
struct list_head *head);
extern void nfs_pageio_init_write_mds(struct nfs_pageio_descriptor *pgio,
struct inode *inode, int ioflags);
extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
extern void nfs_writedata_release(struct nfs_write_data *wdata);
extern void nfs_commit_free(struct nfs_write_data *p);
extern int nfs_initiate_write(struct nfs_write_data *data,
struct rpc_clnt *clnt,

2
fs/nfs/nfs4filelayout.c
View File

@ -741,7 +741,7 @@ static const struct nfs_pageio_ops filelayout_pg_read_ops = {
static const struct nfs_pageio_ops filelayout_pg_write_ops = {
.pg_init = filelayout_pg_init_write,
.pg_test = filelayout_pg_test,
.pg_doio = nfs_generic_pg_writepages,
.pg_doio = pnfs_generic_pg_writepages,
};
static bool filelayout_mark_pnfs_commit(struct pnfs_layout_segment *lseg)

2
fs/nfs/objlayout/objio_osd.c
View File

@ -1013,7 +1013,7 @@ static const struct nfs_pageio_ops objio_pg_read_ops = {
static const struct nfs_pageio_ops objio_pg_write_ops = {
.pg_init = pnfs_generic_pg_init_write,
.pg_test = objio_pg_test,
.pg_doio = nfs_generic_pg_writepages,
.pg_doio = pnfs_generic_pg_writepages,
};
static struct pnfs_layoutdriver_type objlayout_type = {

57
fs/nfs/pnfs.c
View File

@ -1170,15 +1170,30 @@ pnfs_ld_write_done(struct nfs_write_data *data)
}
EXPORT_SYMBOL_GPL(pnfs_ld_write_done);
enum pnfs_try_status
static void
pnfs_write_through_mds(struct nfs_pageio_descriptor *desc,
struct nfs_write_data *data)
{
list_splice_tail_init(&data->pages, &desc->pg_list);
if (data->req && list_empty(&data->req->wb_list))
nfs_list_add_request(data->req, &desc->pg_list);
nfs_pageio_reset_write_mds(desc);
desc->pg_recoalesce = 1;
nfs_writedata_release(data);
}
static enum pnfs_try_status
pnfs_try_to_write_data(struct nfs_write_data *wdata,
const struct rpc_call_ops *call_ops, int how)
const struct rpc_call_ops *call_ops,
struct pnfs_layout_segment *lseg,
int how)
{
struct inode *inode = wdata->inode;
enum pnfs_try_status trypnfs;
struct nfs_server *nfss = NFS_SERVER(inode);
wdata->mds_ops = call_ops;
wdata->lseg = get_lseg(lseg);
dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__,
inode->i_ino, wdata->args.count, wdata->args.offset, how);
@ -1194,6 +1209,44 @@ pnfs_try_to_write_data(struct nfs_write_data *wdata,
return trypnfs;
}
static void
pnfs_do_multiple_writes(struct nfs_pageio_descriptor *desc, struct list_head *head, int how)
{
struct nfs_write_data *data;
const struct rpc_call_ops *call_ops = desc->pg_rpc_callops;
struct pnfs_layout_segment *lseg = desc->pg_lseg;
desc->pg_lseg = NULL;
while (!list_empty(head)) {
enum pnfs_try_status trypnfs;
data = list_entry(head->next, struct nfs_write_data, list);
list_del_init(&data->list);
trypnfs = pnfs_try_to_write_data(data, call_ops, lseg, how);
if (trypnfs == PNFS_NOT_ATTEMPTED)
pnfs_write_through_mds(desc, data);
}
put_lseg(lseg);
}
int
pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc)
{
LIST_HEAD(head);
int ret;
ret = nfs_generic_flush(desc, &head);
if (ret != 0) {
put_lseg(desc->pg_lseg);
desc->pg_lseg = NULL;
return ret;
}
pnfs_do_multiple_writes(desc, &head, desc->pg_ioflags);
return 0;
}
EXPORT_SYMBOL_GPL(pnfs_generic_pg_writepages);
/*
* Called by non rpc-based layout drivers
*/

10
fs/nfs/pnfs.h
View File

@ -155,11 +155,10 @@ bool pnfs_pageio_init_write(struct nfs_pageio_descriptor *, struct inode *, int)
void set_pnfs_layoutdriver(struct nfs_server *, u32 id);
void unset_pnfs_layoutdriver(struct nfs_server *);
enum pnfs_try_status pnfs_try_to_write_data(struct nfs_write_data *,
const struct rpc_call_ops *, int);
void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *, struct nfs_page *);
int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc);
bool pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, struct nfs_page *req);
int pnfs_layout_process(struct nfs4_layoutget *lgp);
void pnfs_free_lseg_list(struct list_head *tmp_list);
@ -328,13 +327,6 @@ static inline void put_lseg(struct pnfs_layout_segment *lseg)
{
}
static inline enum pnfs_try_status
pnfs_try_to_write_data(struct nfs_write_data *data,
const struct rpc_call_ops *call_ops, int how)
{
return PNFS_NOT_ATTEMPTED;
}
static inline int pnfs_return_layout(struct inode *ino)
{
return 0;

39
fs/nfs/write.c
View File

@ -97,7 +97,7 @@ void nfs_writedata_free(struct nfs_write_data *p)
mempool_free(p, nfs_wdata_mempool);
}
static void nfs_writedata_release(struct nfs_write_data *wdata)
void nfs_writedata_release(struct nfs_write_data *wdata)
{
put_lseg(wdata->lseg);
put_nfs_open_context(wdata->args.context);
@ -887,25 +887,15 @@ static void nfs_write_rpcsetup(struct nfs_page *req,
static int nfs_do_write(struct nfs_write_data *data,
const struct rpc_call_ops *call_ops,
struct pnfs_layout_segment *lseg,
int how)
{
struct inode *inode = data->args.context->path.dentry->d_inode;
if (lseg != NULL) {
data->lseg = get_lseg(lseg);
if (pnfs_try_to_write_data(data, call_ops, how) == PNFS_ATTEMPTED)
return 0;
put_lseg(data->lseg);
data->lseg = NULL;
}
return nfs_initiate_write(data, NFS_CLIENT(inode), call_ops, how);
}
static int nfs_do_multiple_writes(struct list_head *head,
const struct rpc_call_ops *call_ops,
struct pnfs_layout_segment *lseg,
int how)
{
struct nfs_write_data *data;
@ -917,7 +907,7 @@ static int nfs_do_multiple_writes(struct list_head *head,
data = list_entry(head->next, struct nfs_write_data, list);
list_del_init(&data->list);
ret2 = nfs_do_write(data, call_ops, lseg, how);
ret2 = nfs_do_write(data, call_ops, how);
if (ret == 0)
ret = ret2;
}
@ -1037,23 +1027,24 @@ static int nfs_flush_one(struct nfs_pageio_descriptor *desc, struct list_head *r
return ret;
}
int nfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc)
int nfs_generic_flush(struct nfs_pageio_descriptor *desc, struct list_head *head)
{
if (desc->pg_bsize < PAGE_CACHE_SIZE)
return nfs_flush_multi(desc, head);
return nfs_flush_one(desc, head);
}
static int nfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc)
{
LIST_HEAD(head);
int ret;
if (desc->pg_bsize < PAGE_CACHE_SIZE)
ret = nfs_flush_multi(desc, &head);
else
ret = nfs_flush_one(desc, &head);
ret = nfs_generic_flush(desc, &head);
if (ret == 0)
ret = nfs_do_multiple_writes(&head, desc->pg_rpc_callops,
desc->pg_lseg, desc->pg_ioflags);
put_lseg(desc->pg_lseg);
desc->pg_lseg = NULL;
desc->pg_ioflags);
return ret;
}
EXPORT_SYMBOL_GPL(nfs_generic_pg_writepages);
static const struct nfs_pageio_ops nfs_pageio_write_ops = {
.pg_test = nfs_generic_pg_test,
@ -1068,6 +1059,12 @@ void nfs_pageio_init_write_mds(struct nfs_pageio_descriptor *pgio,
}
EXPORT_SYMBOL_GPL(nfs_pageio_init_write_mds);
void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio)
{
pgio->pg_ops = &nfs_pageio_write_ops;
pgio->pg_bsize = NFS_SERVER(pgio->pg_inode)->wsize;
}
static void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
struct inode *inode, int ioflags)
{

3
include/linux/nfs_page.h
View File

@ -108,9 +108,6 @@ extern void nfs_unlock_request(struct nfs_page *req);
extern int nfs_set_page_tag_locked(struct nfs_page *req);
extern void nfs_clear_page_tag_locked(struct nfs_page *req);
extern int nfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc);
/*
* Lock the page of an asynchronous request without getting a new reference
*/