1 files changed, 167 insertions, 0 deletions
diff --git a/libglusterfs/src/glusterfs/fd.h b/libglusterfs/src/glusterfs/fd.h
new file mode 100644
index 00000000000..cdbe2894bc3
--- /dev/null
+++ b/libglusterfs/src/glusterfs/fd.h
@@ -0,0 +1,167 @@
+/*
+  Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
+  This file is part of GlusterFS.
+
+  This file is licensed to you under your choice of the GNU Lesser
+  General Public License, version 3 or any later version (LGPLv3 or
+  later), or the GNU General Public License, version 2 (GPLv2), in all
+  cases as published by the Free Software Foundation.
+*/
+
+#ifndef _FD_H
+#define _FD_H
+
+#include "glusterfs/list.h"
+#include <sys/types.h>
+#include <unistd.h>
+#include "glusterfs/glusterfs.h"
+#include "glusterfs/locking.h"
+#include "glusterfs/fd-lk.h"
+#include "glusterfs/common-utils.h"
+
+#define GF_ANON_FD_NO -2
+#define GF_ANON_FD_FLAGS (O_RDWR | O_LARGEFILE)
+
+struct _inode;
+struct _dict;
+struct fd_lk_ctx;
+
+struct _fd_ctx {
+    union {
+        uint64_t key;
+        void *xl_key;
+    };
+    union {
+        uint64_t value1;
+        void *ptr1;
+    };
+};
+
+struct _fd {
+    uint64_t pid;
+    int32_t flags;
+    gf_atomic_t refcount;
+    struct list_head inode_list;
+    struct _inode *inode;
+    gf_lock_t lock; /* used ONLY for manipulating
+                       'struct _fd_ctx' array (_ctx).*/
+    struct _fd_ctx *_ctx;
+    int xl_count; /* Number of xl referred in this fd */
+    struct fd_lk_ctx *lk_ctx;
+    gf_boolean_t anonymous; /* fd which does not have counterpart open
+                               fd on backend (server for client, posix
+                               for server). */
+};
+typedef struct _fd fd_t;
+
+struct fd_table_entry {
+    fd_t *fd;
+    int next_free;
+};
+typedef struct fd_table_entry fdentry_t;
+
+struct _fdtable {
+    int refcount;
+    uint32_t max_fds;
+    pthread_rwlock_t lock;
+    fdentry_t *fdentries;
+    int first_free;
+};
+typedef struct _fdtable fdtable_t;
+
+/* Signifies no more entries in the fd table. */
+#define GF_FDTABLE_END -1
+
+/* This is used to invalidated
+ * the next_free value in an fdentry that has been allocated
+ */
+#define GF_FDENTRY_ALLOCATED -2
+
+#include "glusterfs/logging.h"
+#include "glusterfs/xlator.h"
+
+void
+gf_fd_put(fdtable_t *fdtable, int32_t fd);
+
+fd_t *
+gf_fd_fdptr_get(fdtable_t *fdtable, int64_t fd);
+
+fdtable_t *
+gf_fd_fdtable_alloc(void);
+
+int
+gf_fd_unused_get(fdtable_t *fdtable, fd_t *fdptr);
+
+fdentry_t *
+gf_fd_fdtable_get_all_fds(fdtable_t *fdtable, uint32_t *count);
+
+void
+gf_fd_fdtable_destroy(fdtable_t *fdtable);
+
+fd_t *
+__fd_ref(fd_t *fd);
+
+fd_t *
+fd_ref(fd_t *fd);
+
+void
+fd_unref(fd_t *fd);
+
+fd_t *
+fd_create(struct _inode *inode, pid_t pid);
+
+fd_t *
+fd_create_uint64(struct _inode *inode, uint64_t pid);
+
+fd_t *
+fd_lookup(struct _inode *inode, pid_t pid);
+
+fd_t *
+fd_lookup_uint64(struct _inode *inode, uint64_t pid);
+
+fd_t *
+fd_lookup_anonymous(inode_t *inode, int32_t flags);
+
+fd_t *
+fd_anonymous(inode_t *inode);
+
+fd_t *
+fd_anonymous_with_flags(inode_t *inode, int32_t flags);
+
+gf_boolean_t
+fd_is_anonymous(fd_t *fd);
+
+uint8_t
+fd_list_empty(struct _inode *inode);
+
+fd_t *
+fd_bind(fd_t *fd);
+
+int
+fd_ctx_set(fd_t *fd, xlator_t *xlator, uint64_t value);
+
+int
+fd_ctx_get(fd_t *fd, xlator_t *xlator, uint64_t *value);
+
+int
+fd_ctx_del(fd_t *fd, xlator_t *xlator, uint64_t *value);
+
+int
+__fd_ctx_del(fd_t *fd, xlator_t *xlator, uint64_t *value);
+
+int
+__fd_ctx_set(fd_t *fd, xlator_t *xlator, uint64_t value);
+
+int
+__fd_ctx_get(fd_t *fd, xlator_t *xlator, uint64_t *value);
+
+void
+fd_ctx_dump(fd_t *fd, char *prefix);
+
+fdentry_t *
+gf_fd_fdtable_copy_all_fds(fdtable_t *fdtable, uint32_t *count);
+
+void
+gf_fdptr_put(fdtable_t *fdtable, fd_t *fd);
+
+#endif /* _FD_H */