diff options
Diffstat (limited to 'fs/nfs/pnfs.h')
| -rw-r--r-- | fs/nfs/pnfs.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index 61531f338576..4ed1b48c71b1 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -34,6 +34,11 @@ #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4" +enum { + NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */ + NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */ +}; + /* Per-layout driver specific registration structure */ struct pnfs_layoutdriver_type { struct list_head pnfs_tblid; @@ -44,14 +49,48 @@ struct pnfs_layoutdriver_type { int (*uninitialize_mountpoint) (struct nfs_server *); }; +struct pnfs_layout_hdr { + unsigned long refcount; + unsigned long state; + struct inode *inode; +}; + extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); +struct pnfs_layout_segment * +pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx, + enum pnfs_iomode access_type); void set_pnfs_layoutdriver(struct nfs_server *, u32 id); void unset_pnfs_layoutdriver(struct nfs_server *); +void pnfs_destroy_layout(struct nfs_inode *); + + +static inline int lo_fail_bit(u32 iomode) +{ + return iomode == IOMODE_RW ? + NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; +} + +/* Return true if a layout driver is being used for this mountpoint */ +static inline int pnfs_enabled_sb(struct nfs_server *nfss) +{ + return nfss->pnfs_curr_ld != NULL; +} #else /* CONFIG_NFS_V4_1 */ +static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) +{ +} + +static inline struct pnfs_layout_segment * +pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx, + enum pnfs_iomode access_type) +{ + return NULL; +} + static inline void set_pnfs_layoutdriver(struct nfs_server *s, u32 id) { } |