From: Anna Schumaker <Anna.Schumaker@xxxxxxxxxx>
These functions are identical for the read and write paths, so combine
them in a shared file.
Signed-off-by: Anna Schumaker <Anna.Schumaker@xxxxxxxxxx>
---
fs/nfs/Makefile | 2 +-
fs/nfs/internal.h | 7 +++++--
fs/nfs/pageio.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
fs/nfs/pnfs.c | 4 ++--
fs/nfs/read.c | 54 ++++-------------------------------------------
fs/nfs/write.c | 54 ++++-------------------------------------------
6 files changed, 79 insertions(+), 105 deletions(-)
create mode 100644 fs/nfs/pageio.c
diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile
index 03192a6..551d82a 100644
--- a/fs/nfs/Makefile
+++ b/fs/nfs/Makefile
@@ -7,7 +7,7 @@ obj-$(CONFIG_NFS_FS) += nfs.o
CFLAGS_nfstrace.o += -I$(src)
nfs-y := client.o dir.o file.o getroot.o inode.o super.o \
direct.o pagelist.o read.o symlink.o unlink.o \
- write.o namespace.o mount_clnt.o nfstrace.o
+ write.o namespace.o mount_clnt.o nfstrace.o pageio.o
nfs-$(CONFIG_ROOT_NFS) += nfsroot.o
nfs-$(CONFIG_SYSCTL) += sysctl.o
nfs-$(CONFIG_NFS_FSCACHE) += fscache.o fscache-index.o
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index b0e7a41..7f9d3c4 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -394,6 +394,11 @@ extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool
#endif
struct nfs_pgio_completion_ops;
+
+/* pageio.c */
+extern struct nfs_pgio_data *nfs_pgio_data_alloc(struct nfs_pgio_header *, unsigned int);
+extern void nfs_pgio_data_release(struct nfs_pgio_data *);
+
/* read.c */
extern struct nfs_rw_header *nfs_readhdr_alloc(void);
extern void nfs_readhdr_free(struct nfs_pgio_header *hdr);
@@ -407,7 +412,6 @@ extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc,
struct nfs_pgio_header *hdr);
extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
-extern void nfs_readdata_release(struct nfs_pgio_data *rdata);
/* super.c */
void nfs_clone_super(struct super_block *, struct nfs_mount_info *);
@@ -429,7 +433,6 @@ extern void nfs_writehdr_free(struct nfs_pgio_header *hdr);
extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc,
struct nfs_pgio_header *hdr);
extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
-extern void nfs_writedata_release(struct nfs_pgio_data *wdata);
extern void nfs_commit_free(struct nfs_commit_data *p);
extern int nfs_initiate_write(struct rpc_clnt *clnt,
struct nfs_pgio_data *data,
diff --git a/fs/nfs/pageio.c b/fs/nfs/pageio.c
new file mode 100644
index 0000000..895bb37
--- /dev/null
+++ b/fs/nfs/pageio.c
@@ -0,0 +1,63 @@
+/*
+ * linux/fs/nfs/pageio.c
+ *
+ * Generic pageio functions shared by read and write paths.
+ *
+ * Copyright (c) 2014 Anna Schumaker <anna.schumaker@xxxxxxxxxx>
+ */
+#include <linux/nfs_fs.h>
+#include <linux/nfs_xdr.h>
+
+#include "internal.h"
+
+
+static inline struct nfs_rw_header *NFS_RW_HEADER(struct nfs_pgio_header *hdr)
+{
+ return container_of(hdr, struct nfs_rw_header, header);
+}
+
+struct nfs_pgio_data *nfs_pgio_data_alloc(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;
+ atomic_inc(&hdr->refcnt);
+ } else {
+ if (data != prealloc)
+ kfree(data);
+ data = NULL;
+ }
+out:
+ return data;
+}
+
+void nfs_pgio_data_release(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);
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 43cfe11..e192ba6 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1536,7 +1536,7 @@ pnfs_write_through_mds(struct nfs_pageio_descriptor *desc,
nfs_pageio_reset_write_mds(desc);
desc->pg_recoalesce = 1;
}
- nfs_writedata_release(data);
+ nfs_pgio_data_release(data);
}
static enum pnfs_try_status
@@ -1691,7 +1691,7 @@ pnfs_read_through_mds(struct nfs_pageio_descriptor *desc,
nfs_pageio_reset_read_mds(desc);
desc->pg_recoalesce = 1;
}
- nfs_readdata_release(data);
+ nfs_pgio_data_release(data);
}
/*
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index d29ca36..ab4c1a5 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -51,31 +51,6 @@ struct nfs_rw_header *nfs_readhdr_alloc(void)
}
EXPORT_SYMBOL_GPL(nfs_readhdr_alloc);
-static struct nfs_pgio_data *nfs_readdata_alloc(struct nfs_pgio_header *hdr,
- unsigned int pagecount)
-{
- struct nfs_pgio_data *data, *prealloc;
-
- prealloc = &container_of(hdr, struct nfs_rw_header, header)->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;
- atomic_inc(&hdr->refcnt);
- } else {
- if (data != prealloc)
- kfree(data);
- data = NULL;
- }
-out:
- return data;
-}
-
void nfs_readhdr_free(struct nfs_pgio_header *hdr)
{
struct nfs_rw_header *rhdr = container_of(hdr, struct nfs_rw_header, header);
@@ -84,27 +59,6 @@ void nfs_readhdr_free(struct nfs_pgio_header *hdr)
}
EXPORT_SYMBOL_GPL(nfs_readhdr_free);
-void nfs_readdata_release(struct nfs_pgio_data *rdata)
-{
- struct nfs_pgio_header *hdr = rdata->header;
- struct nfs_rw_header *read_header = container_of(hdr, struct nfs_rw_header, header);
-
- put_nfs_open_context(rdata->args.context);
- if (rdata->pages.pagevec != rdata->pages.page_array)
- kfree(rdata->pages.pagevec);
- if (rdata == &read_header->rpc_data) {
- rdata->header = NULL;
- rdata = 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(rdata);
-}
-EXPORT_SYMBOL_GPL(nfs_readdata_release);
-
static
int nfs_return_empty_page(struct page *page)
{
@@ -327,7 +281,7 @@ static void nfs_pagein_error(struct nfs_pageio_descriptor *desc,
struct nfs_pgio_data *data = list_first_entry(&hdr->rpc_list,
struct nfs_pgio_data, list);
list_del(&data->list);
- nfs_readdata_release(data);
+ nfs_pgio_data_release(data);
}
desc->pg_completion_ops->error_cleanup(&desc->pg_list);
}
@@ -359,7 +313,7 @@ static int nfs_pagein_multi(struct nfs_pageio_descriptor *desc,
do {
size_t len = min(nbytes,rsize);
- data = nfs_readdata_alloc(hdr, 1);
+ data = nfs_pgio_data_alloc(hdr, 1);
if (!data) {
nfs_pagein_error(desc, hdr);
return -ENOMEM;
@@ -385,7 +339,7 @@ static int nfs_pagein_one(struct nfs_pageio_descriptor *desc,
struct nfs_pgio_data *data;
struct list_head *head = &desc->pg_list;
- data = nfs_readdata_alloc(hdr, nfs_page_array_len(desc->pg_base,
+ data = nfs_pgio_data_alloc(hdr, nfs_page_array_len(desc->pg_base,
desc->pg_count));
if (!data) {
nfs_pagein_error(desc, hdr);
@@ -515,7 +469,7 @@ static void nfs_readpage_result_common(struct rpc_task *task, void *calldata)
static void nfs_readpage_release_common(void *calldata)
{
- nfs_readdata_release(calldata);
+ nfs_pgio_data_release(calldata);
}
void nfs_read_prepare(struct rpc_task *task, void *calldata)
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 321a791..0dc4d6a 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -87,31 +87,6 @@ struct nfs_rw_header *nfs_writehdr_alloc(void)
}
EXPORT_SYMBOL_GPL(nfs_writehdr_alloc);
-static struct nfs_pgio_data *nfs_writedata_alloc(struct nfs_pgio_header *hdr,
- unsigned int pagecount)
-{
- struct nfs_pgio_data *data, *prealloc;
-
- prealloc = &container_of(hdr, struct nfs_rw_header, header)->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;
- atomic_inc(&hdr->refcnt);
- } else {
- if (data != prealloc)
- kfree(data);
- data = NULL;
- }
-out:
- return data;
-}
-
void nfs_writehdr_free(struct nfs_pgio_header *hdr)
{
struct nfs_rw_header *whdr = container_of(hdr, struct nfs_rw_header, header);
@@ -119,27 +94,6 @@ void nfs_writehdr_free(struct nfs_pgio_header *hdr)
}
EXPORT_SYMBOL_GPL(nfs_writehdr_free);
-void nfs_writedata_release(struct nfs_pgio_data *wdata)
-{
- struct nfs_pgio_header *hdr = wdata->header;
- struct nfs_rw_header *write_header = container_of(hdr, struct nfs_rw_header, header);
-
- put_nfs_open_context(wdata->args.context);
- if (wdata->pages.pagevec != wdata->pages.page_array)
- kfree(wdata->pages.pagevec);
- if (wdata == &write_header->rpc_data) {
- wdata->header = NULL;
- wdata = 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(wdata);
-}
-EXPORT_SYMBOL_GPL(nfs_writedata_release);
-
static void nfs_context_set_write_error(struct nfs_open_context *ctx, int error)
{
ctx->error = error;
@@ -1146,7 +1100,7 @@ static void nfs_flush_error(struct nfs_pageio_descriptor *desc,
struct nfs_pgio_data *data = list_first_entry(&hdr->rpc_list,
struct nfs_pgio_data, list);
list_del(&data->list);
- nfs_writedata_release(data);
+ nfs_pgio_data_release(data);
}
desc->pg_completion_ops->error_cleanup(&desc->pg_list);
}
@@ -1179,7 +1133,7 @@ static int nfs_flush_multi(struct nfs_pageio_descriptor *desc,
do {
size_t len = min(nbytes, wsize);
- data = nfs_writedata_alloc(hdr, 1);
+ data = nfs_pgio_data_alloc(hdr, 1);
if (!data) {
nfs_flush_error(desc, hdr);
return -ENOMEM;
@@ -1214,7 +1168,7 @@ static int nfs_flush_one(struct nfs_pageio_descriptor *desc,
struct list_head *head = &desc->pg_list;
struct nfs_commit_info cinfo;
- data = nfs_writedata_alloc(hdr, nfs_page_array_len(desc->pg_base,
+ data = nfs_pgio_data_alloc(hdr, nfs_page_array_len(desc->pg_base,
desc->pg_count));
if (!data) {
nfs_flush_error(desc, hdr);
@@ -1348,7 +1302,7 @@ static void nfs_writeback_release_common(void *calldata)
set_bit(NFS_IOHDR_NEED_RESCHED, &hdr->flags);
spin_unlock(&hdr->lock);
}
- nfs_writedata_release(data);
+ nfs_pgio_data_release(data);
}
static const struct rpc_call_ops nfs_write_common_ops = {
--
1.9.2
--
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