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pnfs: add set-clear layoutdriver interface

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To allow layout driver to issue getdevicelist at mount time, and clean up
at umount time.

[fixup non NFS_V4_1 set_pnfs_layoutdriver definition]
[pnfs: pass mntfh down the init_pnfs path]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Benny Halevy <bhalevy@tonian.com>
Signed-off-by: Jim Rees <rees@umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Benny Halevy
2011-07-30 20:52:36 -04:00
committed by Trond Myklebust
parent 7f11d8d38d
commit 738fd0f360
3 changed files with 24 additions and 7 deletions
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8
fs/nfs/pnfs.h
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@@ -80,6 +80,9 @@ struct pnfs_layoutdriver_type {
struct module *owner;
unsigned flags;
int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *);
int (*clear_layoutdriver) (struct nfs_server *);
struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags);
void (*free_layout_hdr) (struct pnfs_layout_hdr *);
@@ -167,7 +170,7 @@ void put_lseg(struct pnfs_layout_segment *lseg);
bool pnfs_pageio_init_read(struct nfs_pageio_descriptor *, struct inode *);
bool pnfs_pageio_init_write(struct nfs_pageio_descriptor *, struct inode *, int);
void set_pnfs_layoutdriver(struct nfs_server *, u32 id);
void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32);
void unset_pnfs_layoutdriver(struct nfs_server *);
void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
@@ -374,7 +377,8 @@ pnfs_roc_drain(struct inode *ino, u32 *barrier)
return false;
}
static inline void set_pnfs_layoutdriver(struct nfs_server *s, u32 id)
static inline void set_pnfs_layoutdriver(struct nfs_server *s,
const struct nfs_fh *mntfh, u32 id);
{
}