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-rw-r--r--fs/nfs/internal.h51
1 files changed, 51 insertions, 0 deletions
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 437ebe544aaf..27c720d71b4e 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -707,6 +707,24 @@ unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
}
/*
+ * Compute and set NFS server rsize / wsize
+ */
+static inline
+unsigned long nfs_io_size(unsigned long iosize, enum xprt_transports proto)
+{
+ if (iosize < NFS_MIN_FILE_IO_SIZE)
+ iosize = NFS_DEF_FILE_IO_SIZE;
+ else if (iosize >= NFS_MAX_FILE_IO_SIZE)
+ iosize = NFS_MAX_FILE_IO_SIZE;
+ else
+ iosize = iosize & PAGE_MASK;
+
+ if (proto == XPRT_TRANSPORT_UDP)
+ return nfs_block_bits(iosize, NULL);
+ return iosize;
+}
+
+/*
* Determine the maximum file size for a superblock
*/
static inline
@@ -861,3 +879,36 @@ static inline void nfs_set_port(struct sockaddr *sap, int *port,
rpc_set_port(sap, *port);
}
+
+struct nfs_direct_req {
+ struct kref kref; /* release manager */
+
+ /* I/O parameters */
+ struct nfs_open_context *ctx; /* file open context info */
+ struct nfs_lock_context *l_ctx; /* Lock context info */
+ struct kiocb * iocb; /* controlling i/o request */
+ struct inode * inode; /* target file of i/o */
+
+ /* completion state */
+ atomic_t io_count; /* i/os we're waiting for */
+ spinlock_t lock; /* protect completion state */
+
+ loff_t io_start; /* Start offset for I/O */
+ ssize_t count, /* bytes actually processed */
+ max_count, /* max expected count */
+ bytes_left, /* bytes left to be sent */
+ error; /* any reported error */
+ struct completion completion; /* wait for i/o completion */
+
+ /* commit state */
+ struct nfs_mds_commit_info mds_cinfo; /* Storage for cinfo */
+ struct pnfs_ds_commit_info ds_cinfo; /* Storage for cinfo */
+ struct work_struct work;
+ int flags;
+ /* for write */
+#define NFS_ODIRECT_DO_COMMIT (1) /* an unstable reply was received */
+#define NFS_ODIRECT_RESCHED_WRITES (2) /* write verification failed */
+ /* for read */
+#define NFS_ODIRECT_SHOULD_DIRTY (3) /* dirty user-space page after read */
+#define NFS_ODIRECT_DONE INT_MAX /* write verification failed */
+};