#ifndef FS_NFS_PNFS_H
#define FS_NFS_PNFS_H
+enum {
+ NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */
+};
+
struct pnfs_layout_segment {
- struct list_head fi_list;
- struct pnfs_layout_range range;
- struct kref kref;
- struct pnfs_layout_hdr *layout;
+ struct list_head pls_list;
+ struct pnfs_layout_range pls_range;
+ atomic_t pls_refcount;
+ unsigned long pls_flags;
+ struct pnfs_layout_hdr *pls_layout;
};
#ifdef CONFIG_NFS_V4_1
enum {
NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */
NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */
- NFS_LAYOUT_STATEID_SET, /* have a valid layout stateid */
+ NFS_LAYOUT_DESTROYED, /* no new use of layout allowed */
};
/* Per-layout driver specific registration structure */
};
struct pnfs_layout_hdr {
- unsigned long refcount;
- struct list_head layouts; /* other client layouts */
- struct list_head segs; /* layout segments list */
- seqlock_t seqlock; /* Protects the stateid */
- nfs4_stateid stateid;
- unsigned long state;
- struct inode *inode;
+ unsigned long plh_refcount;
+ struct list_head plh_layouts; /* other client layouts */
+ struct list_head plh_segs; /* layout segments list */
+ nfs4_stateid plh_stateid;
+ unsigned long plh_flags;
+ struct inode *plh_inode;
};
struct pnfs_device {
void pnfs_destroy_layout(struct nfs_inode *);
void pnfs_destroy_all_layouts(struct nfs_client *);
void put_layout_hdr(struct inode *inode);
-void pnfs_get_layout_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo,
- struct nfs4_state *open_state);
+int pnfs_choose_layoutget_stateid(nfs4_stateid *dst,
+ struct pnfs_layout_hdr *lo,
+ struct nfs4_state *open_state);
static inline int lo_fail_bit(u32 iomode)