diff options
Diffstat (limited to 'fs/nfs/objlayout/objlayout.h')
| -rw-r--r-- | fs/nfs/objlayout/objlayout.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/fs/nfs/objlayout/objlayout.h b/fs/nfs/objlayout/objlayout.h index fa0262149f5..9a405e8069f 100644 --- a/fs/nfs/objlayout/objlayout.h +++ b/fs/nfs/objlayout/objlayout.h @@ -59,6 +59,26 @@ OBJLAYOUT(struct pnfs_layout_hdr *lo) } /* + * per-I/O operation state + * embedded in objects provider io_state data structure + */ +struct objlayout_io_state { + struct pnfs_layout_segment *lseg; + + struct page **pages; + unsigned pgbase; + unsigned nr_pages; + unsigned long count; + loff_t offset; + bool sync; + + void *rpcdata; + int status; /* res */ + int eof; /* res */ + int committed; /* res */ +}; + +/* * Raid engine I/O API */ extern int objio_alloc_lseg(struct pnfs_layout_segment **outp, @@ -68,9 +88,24 @@ extern int objio_alloc_lseg(struct pnfs_layout_segment **outp, gfp_t gfp_flags); extern void objio_free_lseg(struct pnfs_layout_segment *lseg); +extern int objio_alloc_io_state( + struct pnfs_layout_segment *lseg, + struct objlayout_io_state **outp, + gfp_t gfp_flags); +extern void objio_free_io_state(struct objlayout_io_state *state); + +extern ssize_t objio_read_pagelist(struct objlayout_io_state *ol_state); +extern ssize_t objio_write_pagelist(struct objlayout_io_state *ol_state, + bool stable); + /* * callback API */ +extern void objlayout_read_done(struct objlayout_io_state *state, + ssize_t status, bool sync); +extern void objlayout_write_done(struct objlayout_io_state *state, + ssize_t status, bool sync); + extern int objlayout_get_deviceinfo(struct pnfs_layout_hdr *pnfslay, struct nfs4_deviceid *d_id, struct pnfs_osd_deviceaddr **deviceaddr, gfp_t gfp_flags); @@ -89,4 +124,11 @@ extern struct pnfs_layout_segment *objlayout_alloc_lseg( gfp_t gfp_flags); extern void objlayout_free_lseg(struct pnfs_layout_segment *); +extern enum pnfs_try_status objlayout_read_pagelist( + struct nfs_read_data *); + +extern enum pnfs_try_status objlayout_write_pagelist( + struct nfs_write_data *, + int how); + #endif /* _OBJLAYOUT_H */ |