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Diffstat (limited to 'include/linux/nfs_page.h')
-rw-r--r--include/linux/nfs_page.h22
1 files changed, 19 insertions, 3 deletions
diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h
index 6c3e06ee2fb7..3eb072dbce83 100644
--- a/include/linux/nfs_page.h
+++ b/include/linux/nfs_page.h
@@ -58,6 +58,9 @@ struct nfs_pageio_ops {
size_t (*pg_test)(struct nfs_pageio_descriptor *, struct nfs_page *,
struct nfs_page *);
int (*pg_doio)(struct nfs_pageio_descriptor *);
+ unsigned int (*pg_get_mirror_count)(struct nfs_pageio_descriptor *,
+ struct nfs_page *);
+ void (*pg_cleanup)(struct nfs_pageio_descriptor *);
};
struct nfs_rw_ops {
@@ -69,18 +72,21 @@ struct nfs_rw_ops {
struct inode *);
void (*rw_result)(struct rpc_task *, struct nfs_pgio_header *);
void (*rw_initiate)(struct nfs_pgio_header *, struct rpc_message *,
+ const struct nfs_rpc_ops *,
struct rpc_task_setup *, int);
};
-struct nfs_pageio_descriptor {
+struct nfs_pgio_mirror {
struct list_head pg_list;
unsigned long pg_bytes_written;
size_t pg_count;
size_t pg_bsize;
unsigned int pg_base;
- unsigned char pg_moreio : 1,
- pg_recoalesce : 1;
+ unsigned char pg_recoalesce : 1;
+};
+struct nfs_pageio_descriptor {
+ unsigned char pg_moreio : 1;
struct inode *pg_inode;
const struct nfs_pageio_ops *pg_ops;
const struct nfs_rw_ops *pg_rw_ops;
@@ -91,8 +97,18 @@ struct nfs_pageio_descriptor {
struct pnfs_layout_segment *pg_lseg;
struct nfs_direct_req *pg_dreq;
void *pg_layout_private;
+ unsigned int pg_bsize; /* default bsize for mirrors */
+
+ u32 pg_mirror_count;
+ struct nfs_pgio_mirror *pg_mirrors;
+ struct nfs_pgio_mirror pg_mirrors_static[1];
+ struct nfs_pgio_mirror *pg_mirrors_dynamic;
+ u32 pg_mirror_idx; /* current mirror */
};
+/* arbitrarily selected limit to number of mirrors */
+#define NFS_PAGEIO_DESCRIPTOR_MIRROR_MAX 16
+
#define NFS_WBACK_BUSY(req) (test_bit(PG_BUSY,&(req)->wb_flags))
extern struct nfs_page *nfs_create_request(struct nfs_open_context *ctx,