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nfs: move nfs_pgio_data and remove nfs_rw_header 

nfs_rw_header was used to allocate an nfs_pgio_header along with an
nfs_pgio_data, because a _header would need at least one _data.

Now there is only ever one nfs_pgio_data for each nfs_pgio_header -- move
it to nfs_pgio_header and get rid of nfs_rw_header.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Weston Andros Adamson 2014-06-09 11:48:33 -04:00 committed by Trond Myklebust
parent 66b0686049
commit 1e7f3a4859
8 changed files with 71 additions and 119 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
fs/nfs/direct.c
View File

@ -148,8 +148,8 @@ static void nfs_direct_set_hdr_verf(struct nfs_direct_req *dreq,
{
struct nfs_writeverf *verfp;
verfp = nfs_direct_select_verf(dreq, hdr->data->ds_clp,
hdr->data->ds_idx);
verfp = nfs_direct_select_verf(dreq, hdr->data.ds_clp,
hdr->data.ds_idx);
WARN_ON_ONCE(verfp->committed >= 0);
memcpy(verfp, &hdr->verf, sizeof(struct nfs_writeverf));
WARN_ON_ONCE(verfp->committed < 0);
@ -169,8 +169,8 @@ static int nfs_direct_set_or_cmp_hdr_verf(struct nfs_direct_req *dreq,
{
struct nfs_writeverf *verfp;
verfp = nfs_direct_select_verf(dreq, hdr->data->ds_clp,
hdr->data->ds_idx);
verfp = nfs_direct_select_verf(dreq, hdr->data.ds_clp,
hdr->data.ds_idx);
if (verfp->committed < 0) {
nfs_direct_set_hdr_verf(dreq, hdr);
return 0;

6
fs/nfs/internal.h
View File

@ -238,9 +238,9 @@ void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
int nfs_iocounter_wait(struct nfs_io_counter *c);
extern const struct nfs_pageio_ops nfs_pgio_rw_ops;
struct nfs_rw_header *nfs_rw_header_alloc(const struct nfs_rw_ops *);
void nfs_rw_header_free(struct nfs_pgio_header *);
void nfs_pgio_data_release(struct nfs_pgio_data *);
struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *);
void nfs_pgio_header_free(struct nfs_pgio_header *);
void nfs_pgio_data_destroy(struct nfs_pgio_data *);
int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *);
int nfs_initiate_pgio(struct rpc_clnt *, struct nfs_pgio_data *,
const struct rpc_call_ops *, int, int);

94
fs/nfs/pagelist.c
View File

@ -452,95 +452,61 @@ size_t nfs_generic_pg_test(struct nfs_pageio_descriptor *desc,
}
EXPORT_SYMBOL_GPL(nfs_generic_pg_test);
static inline struct nfs_rw_header *NFS_RW_HEADER(struct nfs_pgio_header *hdr)
struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *ops)
{
return container_of(hdr, struct nfs_rw_header, header);
}
/**
* nfs_rw_header_alloc - Allocate a header for a read or write
* @ops: Read or write function vector
*/
struct nfs_rw_header *nfs_rw_header_alloc(const struct nfs_rw_ops *ops)
{
struct nfs_rw_header *header = ops->rw_alloc_header();
if (header) {
struct nfs_pgio_header *hdr = &header->header;
struct nfs_pgio_header *hdr = ops->rw_alloc_header();
if (hdr) {
INIT_LIST_HEAD(&hdr->pages);
spin_lock_init(&hdr->lock);
atomic_set(&hdr->refcnt, 0);
hdr->rw_ops = ops;
}
return header;
return hdr;
}
EXPORT_SYMBOL_GPL(nfs_rw_header_alloc);
EXPORT_SYMBOL_GPL(nfs_pgio_header_alloc);
/*
* nfs_rw_header_free - Free a read or write header
* nfs_pgio_header_free - Free a read or write header
* @hdr: The header to free
*/
void nfs_rw_header_free(struct nfs_pgio_header *hdr)
void nfs_pgio_header_free(struct nfs_pgio_header *hdr)
{
hdr->rw_ops->rw_free_header(NFS_RW_HEADER(hdr));
hdr->rw_ops->rw_free_header(hdr);
}
EXPORT_SYMBOL_GPL(nfs_rw_header_free);
EXPORT_SYMBOL_GPL(nfs_pgio_header_free);
/**
* nfs_pgio_data_alloc - Allocate pageio data
* @hdr: The header making a request
* @pagecount: Number of pages to create
*/
static struct nfs_pgio_data *nfs_pgio_data_alloc(struct nfs_pgio_header *hdr,
unsigned int pagecount)
static bool nfs_pgio_data_init(struct nfs_pgio_header *hdr,
unsigned int pagecount)
{
struct nfs_pgio_data *data, *prealloc;
prealloc = &NFS_RW_HEADER(hdr)->rpc_data;
if (prealloc->header == NULL)
data = prealloc;
else
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
goto out;
if (nfs_pgarray_set(&data->pages, pagecount)) {
data->header = hdr;
if (nfs_pgarray_set(&hdr->data.pages, pagecount)) {
hdr->data.header = hdr;
atomic_inc(&hdr->refcnt);
} else {
if (data != prealloc)
kfree(data);
data = NULL;
return true;
}
out:
return data;
return false;
}
/**
* nfs_pgio_data_release - Properly free pageio data
* @data: The data to release
* nfs_pgio_data_destroy - Properly free pageio data
* @data: The data to destroy
*/
void nfs_pgio_data_release(struct nfs_pgio_data *data)
void nfs_pgio_data_destroy(struct nfs_pgio_data *data)
{
struct nfs_pgio_header *hdr = data->header;
struct nfs_rw_header *pageio_header = NFS_RW_HEADER(hdr);
put_nfs_open_context(data->args.context);
if (data->pages.pagevec != data->pages.page_array)
kfree(data->pages.pagevec);
if (data == &pageio_header->rpc_data) {
data->header = NULL;
data = NULL;
}
if (atomic_dec_and_test(&hdr->refcnt))
hdr->completion_ops->completion(hdr);
/* Note: we only free the rpc_task after callbacks are done.
* See the comment in rpc_free_task() for why
*/
kfree(data);
}
EXPORT_SYMBOL_GPL(nfs_pgio_data_release);
EXPORT_SYMBOL_GPL(nfs_pgio_data_destroy);
/**
* nfs_pgio_rpcsetup - Set up arguments for a pageio call
@ -655,8 +621,7 @@ static int nfs_pgio_error(struct nfs_pageio_descriptor *desc,
struct nfs_pgio_header *hdr)
{
set_bit(NFS_IOHDR_REDO, &hdr->flags);
nfs_pgio_data_release(hdr->data);
hdr->data = NULL;
nfs_pgio_data_destroy(&hdr->data);
desc->pg_completion_ops->error_cleanup(&desc->pg_list);
return -ENOMEM;
}
@ -670,7 +635,7 @@ static void nfs_pgio_release(void *calldata)
struct nfs_pgio_data *data = calldata;
if (data->header->rw_ops->rw_release)
data->header->rw_ops->rw_release(data);
nfs_pgio_data_release(data);
nfs_pgio_data_destroy(data);
}
/**
@ -746,11 +711,11 @@ int nfs_generic_pgio(struct nfs_pageio_descriptor *desc,
struct list_head *head = &desc->pg_list;
struct nfs_commit_info cinfo;
data = nfs_pgio_data_alloc(hdr, nfs_page_array_len(desc->pg_base,
desc->pg_count));
if (!data)
if (!nfs_pgio_data_init(hdr, nfs_page_array_len(desc->pg_base,
desc->pg_count)))
return nfs_pgio_error(desc, hdr);
data = &hdr->data;
nfs_init_cinfo(&cinfo, desc->pg_inode, desc->pg_dreq);
pages = data->pages.pagevec;
while (!list_empty(head)) {
@ -766,7 +731,6 @@ int nfs_generic_pgio(struct nfs_pageio_descriptor *desc,
/* Set up the argument struct */
nfs_pgio_rpcsetup(data, desc->pg_count, 0, desc->pg_ioflags, &cinfo);
hdr->data = data;
desc->pg_rpc_callops = &nfs_pgio_common_ops;
return 0;
}
@ -774,22 +738,20 @@ EXPORT_SYMBOL_GPL(nfs_generic_pgio);
static int nfs_generic_pg_pgios(struct nfs_pageio_descriptor *desc)
{
struct nfs_rw_header *rw_hdr;
struct nfs_pgio_header *hdr;
int ret;
rw_hdr = nfs_rw_header_alloc(desc->pg_rw_ops);
if (!rw_hdr) {
hdr = nfs_pgio_header_alloc(desc->pg_rw_ops);
if (!hdr) {
desc->pg_completion_ops->error_cleanup(&desc->pg_list);
return -ENOMEM;
}
hdr = &rw_hdr->header;
nfs_pgheader_init(desc, hdr, nfs_rw_header_free);
nfs_pgheader_init(desc, hdr, nfs_pgio_header_free);
atomic_inc(&hdr->refcnt);
ret = nfs_generic_pgio(desc, hdr);
if (ret == 0)
ret = nfs_initiate_pgio(NFS_CLIENT(hdr->inode),
hdr->data, desc->pg_rpc_callops,
&hdr->data, desc->pg_rpc_callops,
desc->pg_ioflags, 0);
if (atomic_dec_and_test(&hdr->refcnt))
hdr->completion_ops->completion(hdr);

24
fs/nfs/pnfs.c
View File

@ -1546,7 +1546,7 @@ pnfs_write_through_mds(struct nfs_pageio_descriptor *desc,
nfs_pageio_reset_write_mds(desc);
desc->pg_recoalesce = 1;
}
nfs_pgio_data_release(data);
nfs_pgio_data_destroy(data);
}
static enum pnfs_try_status
@ -1575,7 +1575,7 @@ static void
pnfs_do_write(struct nfs_pageio_descriptor *desc,
struct nfs_pgio_header *hdr, int how)
{
struct nfs_pgio_data *data = hdr->data;
struct nfs_pgio_data *data = &hdr->data;
const struct rpc_call_ops *call_ops = desc->pg_rpc_callops;
struct pnfs_layout_segment *lseg = desc->pg_lseg;
enum pnfs_try_status trypnfs;
@ -1590,25 +1590,23 @@ pnfs_do_write(struct nfs_pageio_descriptor *desc,
static void pnfs_writehdr_free(struct nfs_pgio_header *hdr)
{
pnfs_put_lseg(hdr->lseg);
nfs_rw_header_free(hdr);
nfs_pgio_header_free(hdr);
}
EXPORT_SYMBOL_GPL(pnfs_writehdr_free);
int
pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc)
{
struct nfs_rw_header *whdr;
struct nfs_pgio_header *hdr;
int ret;
whdr = nfs_rw_header_alloc(desc->pg_rw_ops);
if (!whdr) {
hdr = nfs_pgio_header_alloc(desc->pg_rw_ops);
if (!hdr) {
desc->pg_completion_ops->error_cleanup(&desc->pg_list);
pnfs_put_lseg(desc->pg_lseg);
desc->pg_lseg = NULL;
return -ENOMEM;
}
hdr = &whdr->header;
nfs_pgheader_init(desc, hdr, pnfs_writehdr_free);
hdr->lseg = pnfs_get_lseg(desc->pg_lseg);
atomic_inc(&hdr->refcnt);
@ -1696,7 +1694,7 @@ pnfs_read_through_mds(struct nfs_pageio_descriptor *desc,
nfs_pageio_reset_read_mds(desc);
desc->pg_recoalesce = 1;
}
nfs_pgio_data_release(data);
nfs_pgio_data_destroy(data);
}
/*
@ -1727,7 +1725,7 @@ pnfs_try_to_read_data(struct nfs_pgio_data *rdata,
static void
pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr)
{
struct nfs_pgio_data *data = hdr->data;
struct nfs_pgio_data *data = &hdr->data;
const struct rpc_call_ops *call_ops = desc->pg_rpc_callops;
struct pnfs_layout_segment *lseg = desc->pg_lseg;
enum pnfs_try_status trypnfs;
@ -1742,26 +1740,24 @@ pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr)
static void pnfs_readhdr_free(struct nfs_pgio_header *hdr)
{
pnfs_put_lseg(hdr->lseg);
nfs_rw_header_free(hdr);
nfs_pgio_header_free(hdr);
}
EXPORT_SYMBOL_GPL(pnfs_readhdr_free);
int
pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc)
{
struct nfs_rw_header *rhdr;
struct nfs_pgio_header *hdr;
int ret;
rhdr = nfs_rw_header_alloc(desc->pg_rw_ops);
if (!rhdr) {
hdr = nfs_pgio_header_alloc(desc->pg_rw_ops);
if (!hdr) {
desc->pg_completion_ops->error_cleanup(&desc->pg_list);
ret = -ENOMEM;
pnfs_put_lseg(desc->pg_lseg);
desc->pg_lseg = NULL;
return ret;
}
hdr = &rhdr->header;
nfs_pgheader_init(desc, hdr, pnfs_readhdr_free);
hdr->lseg = pnfs_get_lseg(desc->pg_lseg);
atomic_inc(&hdr->refcnt);

6
fs/nfs/read.c
View File

@ -33,12 +33,12 @@ static const struct nfs_rw_ops nfs_rw_read_ops;
static struct kmem_cache *nfs_rdata_cachep;
static struct nfs_rw_header *nfs_readhdr_alloc(void)
static struct nfs_pgio_header *nfs_readhdr_alloc(void)
{
return kmem_cache_zalloc(nfs_rdata_cachep, GFP_KERNEL);
}
static void nfs_readhdr_free(struct nfs_rw_header *rhdr)
static void nfs_readhdr_free(struct nfs_pgio_header *rhdr)
{
kmem_cache_free(nfs_rdata_cachep, rhdr);
}
@ -404,7 +404,7 @@ out:
int __init nfs_init_readpagecache(void)
{
nfs_rdata_cachep = kmem_cache_create("nfs_read_data",
sizeof(struct nfs_rw_header),
sizeof(struct nfs_pgio_header),
0, SLAB_HWCACHE_ALIGN,
NULL);
if (nfs_rdata_cachep == NULL)

10
fs/nfs/write.c
View File

@ -70,18 +70,18 @@ void nfs_commit_free(struct nfs_commit_data *p)
}
EXPORT_SYMBOL_GPL(nfs_commit_free);
static struct nfs_rw_header *nfs_writehdr_alloc(void)
static struct nfs_pgio_header *nfs_writehdr_alloc(void)
{
struct nfs_rw_header *p = mempool_alloc(nfs_wdata_mempool, GFP_NOIO);
struct nfs_pgio_header *p = mempool_alloc(nfs_wdata_mempool, GFP_NOIO);
if (p)
memset(p, 0, sizeof(*p));
return p;
}
static void nfs_writehdr_free(struct nfs_rw_header *whdr)
static void nfs_writehdr_free(struct nfs_pgio_header *hdr)
{
mempool_free(whdr, nfs_wdata_mempool);
mempool_free(hdr, nfs_wdata_mempool);
}
static void nfs_context_set_write_error(struct nfs_open_context *ctx, int error)
@ -1655,7 +1655,7 @@ int nfs_migrate_page(struct address_space *mapping, struct page *newpage,
int __init nfs_init_writepagecache(void)
{
nfs_wdata_cachep = kmem_cache_create("nfs_write_data",
sizeof(struct nfs_rw_header),
sizeof(struct nfs_pgio_header),
0, SLAB_HWCACHE_ALIGN,
NULL);
if (nfs_wdata_cachep == NULL)

4
include/linux/nfs_page.h
View File

@ -62,8 +62,8 @@ struct nfs_pageio_ops {
struct nfs_rw_ops {
const fmode_t rw_mode;
struct nfs_rw_header *(*rw_alloc_header)(void);
void (*rw_free_header)(struct nfs_rw_header *);
struct nfs_pgio_header *(*rw_alloc_header)(void);
void (*rw_free_header)(struct nfs_pgio_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 *);

38
include/linux/nfs_xdr.h
View File

@ -1257,13 +1257,27 @@ enum {
NFS_IOHDR_NEED_RESCHED,
};
struct nfs_pgio_data;
struct nfs_pgio_data {
struct nfs_pgio_header *header;
struct list_head list;
struct rpc_task task;
struct nfs_fattr fattr;
struct nfs_writeverf verf; /* Used for writes */
struct nfs_pgio_args args; /* argument struct */
struct nfs_pgio_res res; /* result struct */
unsigned long timestamp; /* For lease renewal */
int (*pgio_done_cb)(struct rpc_task *task, struct nfs_pgio_data *data);
__u64 mds_offset; /* Filelayout dense stripe */
struct nfs_page_array pages;
struct nfs_client *ds_clp; /* pNFS data server */
int ds_idx; /* ds index if ds_clp is set */
};
struct nfs_pgio_header {
struct inode *inode;
struct rpc_cred *cred;
struct list_head pages;
struct nfs_pgio_data *data;
struct nfs_pgio_data data;
atomic_t refcnt;
struct nfs_page *req;
struct nfs_writeverf verf; /* Used for writes */
@ -1283,26 +1297,6 @@ struct nfs_pgio_header {
unsigned long flags;
};
struct nfs_pgio_data {
struct nfs_pgio_header *header;
struct rpc_task task;
struct nfs_fattr fattr;
struct nfs_writeverf verf; /* Used for writes */
struct nfs_pgio_args args; /* argument struct */
struct nfs_pgio_res res; /* result struct */
unsigned long timestamp; /* For lease renewal */
int (*pgio_done_cb) (struct rpc_task *task, struct nfs_pgio_data *data);
__u64 mds_offset; /* Filelayout dense stripe */
struct nfs_page_array pages;
struct nfs_client *ds_clp; /* pNFS data server */
int ds_idx; /* ds index if ds_clp is set */
};
struct nfs_rw_header {
struct nfs_pgio_header header;
struct nfs_pgio_data rpc_data;
};
struct nfs_mds_commit_info {
atomic_t rpcs_out;
unsigned long ncommit;