lockd: stop abusing file_lock_list
Currently lockd directly access the file_lock_list from fs/locks.c.
It does so to mark locks granted or reclaimable. This is very
suboptimal, because a) lockd needs to poke into locks.c internals, and
b) it needs to iterate over all locks in the system for marking locks
granted or reclaimable.
This patch adds lists for granted and reclaimable locks to the nlm_host
structure instead, and adds locks to those.
nlmclnt_lock:
now adds the lock to h_granted instead of setting the
NFS_LCK_GRANTED, still O(1)
nlmclnt_mark_reclaim:
goes away completely, replaced by a list_splice_init.
Complexity reduced from O(locks in the system) to O(1)
reclaimer:
iterates over h_reclaim now, complexity reduced from
O(locks in the system) to O(locks per nlm_host)
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/include/linux/fs.h b/include/linux/fs.h
index d2cffee..5dc0fa2 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -730,8 +730,6 @@
#define OFFT_OFFSET_MAX INT_LIMIT(off_t)
#endif
-extern struct list_head file_lock_list;
-
#include <linux/fcntl.h>
extern int fcntl_getlk(struct file *, struct flock __user *);
diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h
index 860a93f..b0f63b6 100644
--- a/include/linux/lockd/lockd.h
+++ b/include/linux/lockd/lockd.h
@@ -59,6 +59,8 @@
unsigned long h_expires; /* eligible for GC */
struct list_head h_lockowners; /* Lockowners for the client */
spinlock_t h_lock;
+ struct list_head h_granted; /* Locks in GRANTED state */
+ struct list_head h_reclaim; /* Locks in RECLAIM state */
};
/*
diff --git a/include/linux/nfs_fs_i.h b/include/linux/nfs_fs_i.h
index e2c18dab..8617302 100644
--- a/include/linux/nfs_fs_i.h
+++ b/include/linux/nfs_fs_i.h
@@ -12,8 +12,8 @@
*/
struct nfs_lock_info {
u32 state;
- u32 flags;
struct nlm_lockowner *owner;
+ struct list_head list;
};
struct nfs4_lock_state;
@@ -21,10 +21,4 @@
struct nfs4_lock_state *owner;
};
-/*
- * Lock flag values
- */
-#define NFS_LCK_GRANTED 0x0001 /* lock has been granted */
-#define NFS_LCK_RECLAIM 0x0002 /* lock marked for reclaiming */
-
#endif