diff options
| author |   Andy Adamson <andros@netapp.com> | 2010-10-20 00:18:02 -0400 |
|---|---|---|
| committer |   Trond Myklebust <Trond.Myklebust@netapp.com> | 2010-10-24 18:07:10 -0400 |
| commit | 974cec8ca0352eb5d281535b714cf194a606e98f (patch) | |
| tree | 0e71706c3091fc785bab0be8edc5de36816685ff /fs/nfs/pnfs.h | |
| parent | NFS: create and destroy inode's layout cache (diff) | |
| download | linux-dev-974cec8ca0352eb5d281535b714cf194a606e98f.tar.xz linux-dev-974cec8ca0352eb5d281535b714cf194a606e98f.zip | |
NFS: client needs to maintain list of inodes with active layouts
In particular, server reboot will invalidate all layouts.
Note that in order to have an active layout, we must get a successful response
from the server. To avoid adding that machinery, this patch just includes a
stub that fakes up a successful return. Since the layout is never referenced
for io, this is not a problem.
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Dean Hildebrand <dhildebz@umich.edu>
Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/pnfs.h')
| -rw-r--r-- | fs/nfs/pnfs.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index 4ed1b48c71b1..1c3eb02f4944 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -30,6 +30,13 @@ #ifndef FS_NFS_PNFS_H #define FS_NFS_PNFS_H +struct pnfs_layout_segment { + struct list_head fi_list; + u32 iomode; + struct kref kref; + struct pnfs_layout_hdr *layout; +}; + #ifdef CONFIG_NFS_V4_1 #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4" @@ -51,6 +58,8 @@ struct pnfs_layoutdriver_type { struct pnfs_layout_hdr { unsigned long refcount; + struct list_head layouts; /* other client layouts */ + struct list_head segs; /* layout segments list */ unsigned long state; struct inode *inode; }; @@ -64,6 +73,7 @@ pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx, void set_pnfs_layoutdriver(struct nfs_server *, u32 id); void unset_pnfs_layoutdriver(struct nfs_server *); void pnfs_destroy_layout(struct nfs_inode *); +void pnfs_destroy_all_layouts(struct nfs_client *); static inline int lo_fail_bit(u32 iomode) @@ -80,6 +90,10 @@ static inline int pnfs_enabled_sb(struct nfs_server *nfss) #else /* CONFIG_NFS_V4_1 */ +static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) +{ +} + static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) { } |