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| author | Benny Halevy <bhalevy@panasas.com> | 2011-05-22 19:47:26 +0300 |
|---|---|---|
| committer | Boaz Harrosh <bharrosh@panasas.com> | 2011-05-29 20:52:32 +0300 |
| commit | fb3296eb4636763918edef2d22e45b85b15d4518 (patch) | |
| tree | 31c85255ccfa03cbca2d1e4e52028e489276a73b /fs/nfs/pnfs.h | |
| parent | f7da7a129d57bfe0f74573dc03531c63e1360fae (diff) | |
| download | linux-fb3296eb4636763918edef2d22e45b85b15d4518.tar.gz linux-fb3296eb4636763918edef2d22e45b85b15d4518.tar.bz2 linux-fb3296eb4636763918edef2d22e45b85b15d4518.zip | |
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.h | 6 |
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; } |