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authorBenny Halevy <bhalevy@panasas.com>2011-05-22 19:47:26 +0300
committerBoaz Harrosh <bharrosh@panasas.com>2011-05-29 20:52:32 +0300
commitfb3296eb4636763918edef2d22e45b85b15d4518 (patch)
tree31c85255ccfa03cbca2d1e4e52028e489276a73b /fs/nfs/pnfs.h
parentf7da7a129d57bfe0f74573dc03531c63e1360fae (diff)
downloadlinux-stericsson-fb3296eb4636763918edef2d22e45b85b15d4518.tar.gz
pnfs: Use byte-range for layoutget
Add offset and count parameters to pnfs_update_layout and use them to get the layout in the pageio path. Order cache layout segments in the following order: * offset (ascending) * length (descending) * iomode (RW before READ) Test byte range against the layout segment in use in pnfs_{read,write}_pg_test so not to coalesce pages not using the same layout segment. [fix lseg ordering] [clean up pnfs_find_lseg lseg arg] [remove unnecessary FIXME] [fix ordering in pnfs_insert_layout] [clean up pnfs_insert_layout] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Diffstat (limited to 'fs/nfs/pnfs.h')
-rw-r--r--fs/nfs/pnfs.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 5b083d295334..78f8a4a171b3 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -131,7 +131,8 @@ void get_layout_hdr(struct pnfs_layout_hdr *lo);
void put_lseg(struct pnfs_layout_segment *lseg);
struct pnfs_layout_segment *
pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx,
- enum pnfs_iomode access_type, gfp_t gfp_flags);
+ loff_t pos, u64 count, enum pnfs_iomode access_type,
+ gfp_t gfp_flags);
void set_pnfs_layoutdriver(struct nfs_server *, u32 id);
void unset_pnfs_layoutdriver(struct nfs_server *);
enum pnfs_try_status pnfs_try_to_write_data(struct nfs_write_data *,
@@ -271,7 +272,8 @@ static inline void put_lseg(struct pnfs_layout_segment *lseg)
static inline struct pnfs_layout_segment *
pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx,
- enum pnfs_iomode access_type, gfp_t gfp_flags)
+ loff_t pos, u64 count, enum pnfs_iomode access_type,
+ gfp_t gfp_flags)
{
return NULL;
}