Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / fs / nfs / pnfs.h

diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index e12367d504894ae15e9066d66446487fd69fa81e..e2612ea0cbed0162d9fcfb74e2824d1617dfd054 100644 (file)
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -30,11 +30,17 @@
 #ifndef FS_NFS_PNFS_H
 #define FS_NFS_PNFS_H
 
+enum {
+       NFS_LSEG_VALID = 0,     /* cleared when lseg is recalled/returned */
+       NFS_LSEG_ROC,           /* roc bit received from server */
+};
+
 struct pnfs_layout_segment {
-       struct list_head fi_list;
-       struct pnfs_layout_range range;
-       struct kref kref;
-       struct pnfs_layout_hdr *layout;
+       struct list_head pls_list;
+       struct pnfs_layout_range pls_range;
+       atomic_t pls_refcount;
+       unsigned long pls_flags;
+       struct pnfs_layout_hdr *pls_layout;
 };
 
 #ifdef CONFIG_NFS_V4_1
@@ -44,7 +50,9 @@ struct pnfs_layout_segment {
 enum {
        NFS_LAYOUT_RO_FAILED = 0,       /* get ro layout failed stop trying */
        NFS_LAYOUT_RW_FAILED,           /* get rw layout failed stop trying */
-       NFS_LAYOUT_STATEID_SET,         /* have a valid layout stateid */
+       NFS_LAYOUT_BULK_RECALL,         /* bulk recall affecting layout */
+       NFS_LAYOUT_ROC,                 /* some lseg had roc bit set */
+       NFS_LAYOUT_DESTROYED,           /* no new use of layout allowed */
 };
 
 /* Per-layout driver specific registration structure */
@@ -60,13 +68,16 @@ 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 */
-       seqlock_t               seqlock;   /* Protects the stateid */
-       nfs4_stateid            stateid;
-       unsigned long           state;
-       struct inode            *inode;
+       atomic_t                plh_refcount;
+       struct list_head        plh_layouts;   /* other client layouts */
+       struct list_head        plh_bulk_recall; /* clnt list of bulk recalls */
+       struct list_head        plh_segs;      /* layout segments list */
+       nfs4_stateid            plh_stateid;
+       atomic_t                plh_outstanding; /* number of RPCs out */
+       unsigned long           plh_block_lgets; /* block LAYOUTGET if >0 */
+       u32                     plh_barrier; /* ignore lower seqids */
+       unsigned long           plh_flags;
+       struct inode            *plh_inode;
 };
 
 struct pnfs_device {
@@ -134,17 +145,30 @@ extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
 extern int nfs4_proc_layoutget(struct nfs4_layoutget *lgp);
 
 /* pnfs.c */
+void get_layout_hdr(struct pnfs_layout_hdr *lo);
 struct pnfs_layout_segment *
 pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx,
                   enum pnfs_iomode access_type);
 void set_pnfs_layoutdriver(struct nfs_server *, u32 id);
 void unset_pnfs_layoutdriver(struct nfs_server *);
 int pnfs_layout_process(struct nfs4_layoutget *lgp);
+void pnfs_free_lseg_list(struct list_head *tmp_list);
 void pnfs_destroy_layout(struct nfs_inode *);
 void pnfs_destroy_all_layouts(struct nfs_client *);
-void put_layout_hdr(struct inode *inode);
-void pnfs_get_layout_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo,
-                            struct nfs4_state *open_state);
+void put_layout_hdr(struct pnfs_layout_hdr *lo);
+void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo,
+                            const nfs4_stateid *new,
+                            bool update_barrier);
+int pnfs_choose_layoutget_stateid(nfs4_stateid *dst,
+                                 struct pnfs_layout_hdr *lo,
+                                 struct nfs4_state *open_state);
+int mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
+                               struct list_head *tmp_list,
+                               u32 iomode);
+bool pnfs_roc(struct inode *ino);
+void pnfs_roc_release(struct inode *ino);
+void pnfs_roc_set_barrier(struct inode *ino, u32 barrier);
+bool pnfs_roc_drain(struct inode *ino, u32 *barrier);
 
 
 static inline int lo_fail_bit(u32 iomode)
@@ -176,6 +200,28 @@ pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx,
        return NULL;
 }
 
+static inline bool
+pnfs_roc(struct inode *ino)
+{
+       return false;
+}
+
+static inline void
+pnfs_roc_release(struct inode *ino)
+{
+}
+
+static inline void
+pnfs_roc_set_barrier(struct inode *ino, u32 barrier)
+{
+}
+
+static inline bool
+pnfs_roc_drain(struct inode *ino, u32 *barrier)
+{
+       return false;
+}
+
 static inline void set_pnfs_layoutdriver(struct nfs_server *s, u32 id)
 {
 }