performance/stat-prefetch: introduce sp_fd_ctx_t to hold context of fds

- we need following extra members along with cache
    1. basename of path on which fd is opened. This is necessary to search
       for cached entry in fd based fops.
    2. inode corresponding to dirname of path on which fd is opened. This
       is necessary to get cache where entry corresponding to file on which
       fd is opened.

Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 221 (stat prefetch implementation)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=221

1 files changed, 13 insertions, 0 deletions

diff --git a/xlators/performance/stat-prefetch/src/stat-prefetch.h b/xlators/performance/stat-prefetch/src/stat-prefetch.h
index 4a45261a4..05c5d4361 100644
--- a/xlators/performance/stat-prefetch/src/stat-prefetch.h
+++ b/xlators/performance/stat-prefetch/src/stat-prefetch.h
@@ -38,6 +38,19 @@ struct sp_cache {
 };
 typedef struct sp_cache sp_cache_t;
 
+struct sp_fd_ctx {
+        sp_cache_t *cache;
+        inode_t    *parent_inode;       /* 
+                                         * inode corresponding to dirname (path)
+                                         */
+        char       *name;               /*
+                                         * basename of path on which this fd is 
+                                         * opened
+                                         */
+        gf_lock_t    lock;
+};
+typedef struct sp_fd_ctx sp_fd_ctx_t;
+
 struct sp_local {
         loc_t  loc;
         fd_t  *fd;