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pnfsblock: add device operations

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Signed-off-by: Jim Rees <rees@umich.edu>
Signed-off-by: Fred Isaman <iisaman@citi.umich.edu>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Benny Halevy <bhalevy@tonian.com>
[upcall bugfixes]
Signed-off-by: Peng Tao <peng_tao@emc.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Jim Rees
2011-07-30 20:52:42 -04:00
committed by Trond Myklebust
parent 9e69296999
commit fe0a9b7408
6 changed files with 277 additions and 2 deletions
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40
fs/nfs/blocklayout/blocklayout.h
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@@ -34,8 +34,16 @@
#include <linux/device-mapper.h>
#include <linux/nfs_fs.h>
#include <linux/sunrpc/rpc_pipe_fs.h>
#include "../pnfs.h"
struct pnfs_block_dev {
struct list_head bm_node;
struct nfs4_deviceid bm_mdevid; /* associated devid */
struct block_device *bm_mdev; /* meta device itself */
};
enum exstate4 {
PNFS_BLOCK_READWRITE_DATA = 0,
PNFS_BLOCK_READ_DATA = 1,
@@ -88,5 +96,37 @@ static inline struct pnfs_block_layout *BLK_LO2EXT(struct pnfs_layout_hdr *lo)
return container_of(lo, struct pnfs_block_layout, bl_layout);
}
struct bl_dev_msg {
int status;
uint32_t major, minor;
};
struct bl_msg_hdr {
u8 type;
u16 totallen; /* length of entire message, including hdr itself */
};
extern struct dentry *bl_device_pipe;
extern wait_queue_head_t bl_wq;
#define BL_DEVICE_UMOUNT 0x0 /* Umount--delete devices */
#define BL_DEVICE_MOUNT 0x1 /* Mount--create devices*/
#define BL_DEVICE_REQUEST_INIT 0x0 /* Start request */
#define BL_DEVICE_REQUEST_PROC 0x1 /* User level process succeeds */
#define BL_DEVICE_REQUEST_ERR 0x2 /* User level process fails */
/* blocklayoutdev.c */
ssize_t bl_pipe_upcall(struct file *, struct rpc_pipe_msg *,
char __user *, size_t);
ssize_t bl_pipe_downcall(struct file *, const char __user *, size_t);
void bl_pipe_destroy_msg(struct rpc_pipe_msg *);
struct block_device *nfs4_blkdev_get(dev_t dev);
int nfs4_blkdev_put(struct block_device *bdev);
struct pnfs_block_dev *nfs4_blk_decode_device(struct nfs_server *server,
struct pnfs_device *dev,
struct list_head *sdlist);
int nfs4_blk_process_layoutget(struct pnfs_layout_hdr *lo,
struct nfs4_layoutget_res *lgr, gfp_t gfp_flags);
void bl_put_extent(struct pnfs_block_extent *be);
#endif /* FS_NFS_NFS4BLOCKLAYOUT_H */