booster: Add new booster-specific fd-table

The reason we need a booster specific fd-table is because
the libglusterfs fd-table has come to a point where it is
optimized for libglusterfs-style of fd allocations.
This conflicts with the way booster requires fds to be allocated
so this commit brings in a re-based version of a booster-specific
fd-table written by Raghu.

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

1 files changed, 72 insertions, 0 deletions

diff --git a/booster/src/booster-fd.h b/booster/src/booster-fd.h
new file mode 100644
index 00000000000..43592e8255a
--- /dev/null
+++ b/booster/src/booster-fd.h
@@ -0,0 +1,72 @@
+/*
+  Copyright (c) 2009 Z RESEARCH, Inc. <http://www.zresearch.com>
+  This file is part of GlusterFS.
+
+  GlusterFS is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published
+  by the Free Software Foundation; either version 3 of the License,
+  or (at your option) any later version.
+
+  GlusterFS is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see
+  <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _BOOSTER_FD_H
+#define _BOOSTER_FD_H
+
+#include <libglusterfsclient.h>
+#include <locking.h>
+#include <list.h>
+
+/* This struct must be updated if the fd_t in fd.h changes.
+ * We cannot include those headers here because unistd.h, included
+ * by glusterfs headers, conflicts with the syscall prototypes we
+ * define for booster.
+ */
+struct _fd {
+        pid_t             pid;
+	int32_t           flags;
+        int32_t           refcount;
+        struct list_head  inode_list;
+        struct _inode    *inode;
+        struct _dict     *ctx;
+        gf_lock_t         lock; /* used ONLY for manipulating
+                                   'struct _fd_ctx' array (_ctx).*/
+	struct _fd_ctx   *_ctx;
+};
+typedef struct _fd fd_t;
+
+
+struct _booster_fdtable {
+        int             refcount;
+        unsigned int    max_fds;
+        gf_lock_t       lock;
+        fd_t            **fds;
+};
+typedef struct _booster_fdtable booster_fdtable_t;
+
+extern int
+booster_fd_unused_get (booster_fdtable_t *fdtable, fd_t *fdptr, int fd);
+
+extern void
+booster_fd_put (booster_fdtable_t *fdtable, int fd);
+
+extern fd_t *
+booster_fdptr_get (booster_fdtable_t *fdtable, int fd);
+
+extern void
+booster_fdptr_put (fd_t *fdptr);
+
+extern void
+booster_fdtable_destroy (booster_fdtable_t *fdtable);
+
+booster_fdtable_t *
+booster_fdtable_alloc (void);
+
+#endif /* #ifndef _BOOSTER_FD_H */