Added all files

3 files changed, 938 insertions, 0 deletions

diff --git a/booster/Makefile.am b/booster/Makefile.am
new file mode 100644
index 00000000000..e1c45f3051c
--- /dev/null
+++ b/booster/Makefile.am
@@ -0,0 +1 @@
+SUBDIRS=src
\ No newline at end of file
diff --git a/booster/src/Makefile.am b/booster/src/Makefile.am
new file mode 100644
index 00000000000..9b6e77f957d
--- /dev/null
+++ b/booster/src/Makefile.am
@@ -0,0 +1,17 @@
+xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/performance
+
+ldpreload_PROGRAMS = glusterfs-booster.so
+ldpreloaddir = $(libdir)/glusterfs/
+glusterfs_booster_so_SOURCES = booster.c 
+glusterfs_booster_so_CFLAGS = -I$(top_srcdir)/libglusterfsclient/src/ -D_GNU_SOURCE -D$(GF_HOST_OS) -fPIC -Wall \
+	-pthread $(GF_BOOSTER_CFLAGS)
+glusterfs_booster_so_CPPFLAGS = -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE  \
+	-I$(top_srcdir)/libglusterfsclient/src \
+	-I$(top_srcdir)/libglusterfs/src -DDATADIR=\"$(localstatedir)\" \
+	-DCONFDIR=\"$(sysconfdir)/glusterfs\"
+glusterfs_booster_so_LDFLAGS = -shared -nostartfiles
+glusterfs_booster_so_LDADD = -L$(top_builddir)/libglusterfs/src -lglusterfs \
+	-L$(top_builddir)/libglusterfsclient/src -lglusterfsclient  
+
+CLEANFILES = 
+
diff --git a/booster/src/booster.c b/booster/src/booster.c
new file mode 100644
index 00000000000..cf5f7883cb9
--- /dev/null
+++ b/booster/src/booster.c
@@ -0,0 +1,920 @@
+/*
+   Copyright (c) 2007, 2008 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 _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include <dlfcn.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/uio.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <libglusterfsclient.h>
+#include <list.h>
+#include <pthread.h>
+#include <fcntl.h>
+#include <sys/xattr.h>
+#include <string.h>
+#include <assert.h>
+
+#ifndef GF_UNIT_KB
+#define GF_UNIT_KB 1024
+#endif
+
+#ifndef UNIX_PATH_MAX
+#define UNIX_PATH_MAX 108
+#endif
+
+struct _inode;
+struct _dict;
+struct _fd {
+        pid_t pid;
+        struct list_head inode_list;
+        struct _inode *inode;
+        struct _dict *ctx;
+        int32_t refcount;
+};
+
+typedef struct _fdtable fdtable_t;
+typedef struct _fd fd_t;
+
+
+inline void 
+gf_fd_put (struct _fdtable *fdtable, int64_t fd);
+
+struct _fd *
+gf_fd_fdptr_get (struct _fdtable *fdtable, int64_t fd);
+
+struct _fdtable *
+gf_fd_fdtable_alloc (void);
+
+void
+gf_fd_fdtable_destroy (struct _fdtable *);
+
+int32_t 
+gf_fd_unused_get (struct _fdtable *fdtable, struct _fd *fdptr);
+
+int32_t 
+gf_fd_unused_get2 (struct _fdtable *fdtable, struct _fd *fdptr, int64_t fd);
+
+void
+fd_unref (struct _fd *fd);
+
+fd_t *
+fd_ref (struct _fd *fd);
+
+pid_t
+getpid (void);
+
+ssize_t
+write (int fd, const void *buf, size_t count);
+
+/* open, open64, creat */
+static int (*real_open) (const char *pathname, int flags, ...);
+static int (*real_open64) (const char *pathname, int flags, ...);
+static int (*real_creat) (const char *pathname, mode_t mode);
+
+/* read, readv, pread, pread64 */
+static ssize_t (*real_read) (int fd, void *buf, size_t count);
+static ssize_t (*real_readv) (int fd, const struct iovec *vector, int count);
+static ssize_t (*real_pread) (int fd, void *buf, size_t count, unsigned long offset);
+static ssize_t (*real_pread64) (int fd, void *buf, size_t count, uint64_t offset);
+
+/* write, writev, pwrite, pwrite64 */
+static ssize_t (*real_write) (int fd, const void *buf, size_t count);
+static ssize_t (*real_writev) (int fd, const struct iovec *vector, int count);
+static ssize_t (*real_pwrite) (int fd, const void *buf, size_t count, unsigned long offset);
+static ssize_t (*real_pwrite64) (int fd, const void *buf, size_t count, uint64_t offset);
+
+/* lseek, llseek, lseek64 */
+static off_t (*real_lseek) (int fildes, unsigned long offset, int whence);
+static off_t (*real_lseek64) (int fildes, uint64_t offset, int whence);
+
+/* close */
+static int (*real_close) (int fd);
+
+/* dup dup2 */
+static int (*real_dup) (int fd);
+static int (*real_dup2) (int oldfd, int newfd);
+
+static pid_t (*real_fork) (void);
+
+#define RESOLVE(sym) do {                                       \
+                if (!real_##sym)                                \
+                        real_##sym = dlsym (RTLD_NEXT, #sym);   \
+        } while (0)
+
+/*TODO: set proper value */
+#define MOUNT_HASH_SIZE 256
+
+struct booster_mount {
+        dev_t st_dev;
+        libglusterfs_handle_t handle;
+        struct list_head device_list;
+};
+typedef struct booster_mount booster_mount_t;
+
+struct booster_mount_table {
+        pthread_mutex_t lock;
+        struct list_head *mounts;
+        int32_t hash_size;
+};
+typedef struct booster_mount_table booster_mount_table_t;
+
+static fdtable_t *booster_glfs_fdtable = NULL;
+static booster_mount_table_t *booster_mount_table = NULL;
+
+static int32_t 
+booster_put_handle (booster_mount_table_t *table,
+                    dev_t st_dev,
+                    libglusterfs_handle_t handle)
+{
+        int32_t hash = 0;
+        booster_mount_t *mount = NULL, *tmp = NULL;
+	int32_t ret = 0;
+
+        mount = calloc (1, sizeof (*mount));
+	if (!mount) {
+		return -1;
+	}
+
+        // ERR_ABORT (mount);
+        INIT_LIST_HEAD (&mount->device_list);
+        mount->st_dev = st_dev;
+        mount->handle = handle;
+
+        hash = st_dev % table->hash_size;
+
+        pthread_mutex_lock (&table->lock);
+        {
+                list_for_each_entry (tmp, &table->mounts[hash], device_list) {
+                        if (tmp->st_dev == st_dev) {
+				ret = -1;
+				errno = EEXIST;
+				goto unlock;
+                        }
+                }
+
+                list_add (&mount->device_list, &table->mounts[hash]);
+        }
+unlock:
+        pthread_mutex_unlock (&table->lock);
+  
+        return ret;
+}
+
+
+static inline long
+booster_get_glfs_fd (fdtable_t *fdtable, int fd)
+{
+        fd_t *glfs_fd = NULL;
+
+        glfs_fd = gf_fd_fdptr_get (fdtable, fd);
+        return (long) glfs_fd;
+}
+
+
+static inline void
+booster_put_glfs_fd (long glfs_fd)
+{
+        fd_unref ((fd_t *)glfs_fd);
+}
+
+
+static inline int32_t
+booster_get_unused_fd (fdtable_t *fdtable, long glfs_fd, int fd)
+{
+        int32_t ret = -1;
+        ret = gf_fd_unused_get2 (fdtable, (fd_t *)glfs_fd, fd);
+        return ret;
+}
+
+
+static inline void
+booster_put_fd (fdtable_t *fdtable, int fd)
+{
+        gf_fd_put (fdtable, fd);
+}
+
+
+static libglusterfs_handle_t 
+booster_get_handle (booster_mount_table_t *table, dev_t st_dev)
+{
+        int32_t hash = 0;
+        booster_mount_t *mount = NULL;
+        libglusterfs_handle_t handle = NULL;
+
+        hash = st_dev % table->hash_size; 
+
+        pthread_mutex_lock (&table->lock);
+        {
+                list_for_each_entry (mount, &table->mounts[hash], device_list) {
+                        if (mount->st_dev == st_dev) {
+                                handle = mount->handle;
+                                break;
+                        }
+                }
+        }
+        pthread_mutex_unlock (&table->lock);
+  
+        return handle;
+}
+
+
+void
+do_open (int fd, int flags, mode_t mode)
+{
+        char *specfile = NULL;
+        libglusterfs_handle_t handle;
+        int32_t file_size;
+        struct stat st = {0,};
+        int32_t ret = -1;
+
+        ret = fstat (fd, &st);
+        if (ret == -1) {
+                return;
+        }
+
+        if (!booster_mount_table) {
+                return;
+        }
+
+	handle = booster_get_handle (booster_mount_table, st.st_dev);
+	if (!handle) {
+		FILE *specfp = NULL;
+		
+		glusterfs_init_ctx_t ctx = {
+			.loglevel = "critical",
+			.lookup_timeout = 600,
+			.stat_timeout = 600,
+		};
+      
+		file_size = fgetxattr (fd, "user.glusterfs-booster-volfile", NULL, 0);
+		if (file_size == -1) {
+			return;
+		}
+		
+		specfile = calloc (1, file_size);
+		if (!specfile) {
+			fprintf (stderr, "cannot allocate memory: %s\n", strerror (errno));
+			return;
+		}
+
+		ret = fgetxattr (fd, "user.glusterfs-booster-volfile", specfile, file_size);
+		if (ret == -1) {
+			free (specfile);
+			return ;
+		}
+    
+		specfp = tmpfile ();
+		if (!specfp) {
+			free (specfile);
+			return;
+		}
+
+		ret = fwrite (specfile, file_size, 1, specfp);
+		if (ret != 1) {
+			fclose (specfp);
+			free (specfile);
+		}
+		
+		fseek (specfp, 0L, SEEK_SET);
+		
+		ctx.logfile = getenv ("GLFS_BOOSTER_LOGFILE");
+		ctx.specfp = specfp;
+
+		handle = glusterfs_init (&ctx);
+		
+		free (specfile);
+		fclose (specfp);
+		
+		if (!handle) {
+			return;
+		}
+
+		ret = booster_put_handle (booster_mount_table, st.st_dev, handle);
+		if (ret == -1) {
+			glusterfs_fini (handle);
+			if (errno != EEXIST) {
+				return;
+			}
+		}
+	}
+  
+        if (handle) {
+                long glfs_fd;
+                char path [UNIX_PATH_MAX];
+                ret = fgetxattr (fd, "user.glusterfs-booster-path", path, UNIX_PATH_MAX);
+                if (ret == -1) {
+                        return;
+                }
+
+                glfs_fd = glusterfs_open (handle, path, flags, mode);
+                if (glfs_fd) {
+                        ret = booster_get_unused_fd (booster_glfs_fdtable, glfs_fd, fd);
+                        if (ret == -1) {
+                                glusterfs_close (glfs_fd);
+                                return;
+                        } 
+                }
+        } 
+
+        return;
+}
+
+#ifndef __USE_FILE_OFFSET64
+int
+open (const char *pathname, int flags, ...)
+{
+        int ret;
+	mode_t mode = 0;
+	va_list ap;
+
+	if (flags & O_CREAT) {
+		va_start (ap, flags);
+		mode = va_arg (ap, mode_t);
+		va_end (ap);
+
+		ret = real_open (pathname, flags, mode);
+	} else {
+		ret = real_open (pathname, flags);
+	}
+
+        if (ret != -1) {
+                flags &= ~ O_CREAT;
+                do_open (ret, flags, mode);
+        }
+
+        return ret;
+}
+#endif
+
+#if defined (__USE_LARGEFILE64) || !defined (__USE_FILE_OFFSET64)
+int
+open64 (const char *pathname, int flags, ...)
+{
+        int ret;
+	mode_t mode = 0;
+	va_list ap;
+
+	if (flags & O_CREAT) {
+		va_start (ap, flags);
+		mode = va_arg (ap, mode_t);
+		va_end (ap);
+
+		ret = real_open64 (pathname, flags, mode);
+	} else {
+		ret = real_open64 (pathname, flags);
+	}
+
+        if (ret != -1) {
+                flags &= ~O_CREAT;
+                do_open (ret, flags, mode);
+        }
+
+        return ret;
+}
+#endif
+
+int
+creat (const char *pathname, mode_t mode)
+{
+        int ret;
+
+        ret = real_creat (pathname, mode);
+
+        if (ret != -1) {
+                do_open (ret, O_WRONLY | O_TRUNC, mode);
+        }
+
+        return ret;
+}
+
+
+/* pread */
+
+ssize_t
+pread (int fd, void *buf, size_t count, unsigned long offset)
+{
+        ssize_t ret;
+        long glfs_fd = 0;
+
+        glfs_fd = booster_get_glfs_fd (booster_glfs_fdtable, fd);
+        if (!glfs_fd) { 
+                ret = real_pread (fd, buf, count, offset);
+        } else {
+                ret = glusterfs_pread (glfs_fd, buf, count, offset);
+                if (ret == -1) {
+                        ret = real_pread (fd, buf, count, offset);
+                }
+                booster_put_glfs_fd (glfs_fd);
+        }
+
+        return ret;
+}
+
+
+ssize_t
+pread64 (int fd, void *buf, size_t count, uint64_t offset)
+{
+        ssize_t ret;
+        long glfs_fd = 0;
+
+        glfs_fd = booster_get_glfs_fd (booster_glfs_fdtable, fd);
+        if (!glfs_fd) { 
+                ret = real_pread (fd, buf, count, offset);
+        } else {
+                ret = glusterfs_pread (glfs_fd, buf, count, offset);
+                if (ret == -1) {
+                        ret = real_pread (fd, buf, count, offset);
+                }
+        }
+
+        return ret;
+}
+
+
+ssize_t
+read (int fd, void *buf, size_t count)
+{
+        int ret;
+        long glfs_fd;
+
+        glfs_fd = booster_get_glfs_fd (booster_glfs_fdtable, fd);
+        if (!glfs_fd) {
+                ret = real_read (fd, buf, count);
+        } else {
+                uint64_t offset = 0;
+                offset = real_lseek64 (fd, 0L, SEEK_CUR);
+                if ((int64_t)offset != -1) {
+                        ret = glusterfs_lseek (glfs_fd, offset, SEEK_SET);
+                        if (ret != -1) {
+                                ret = glusterfs_read (glfs_fd, buf, count);
+                        }
+                } else {
+                        ret = -1;
+                }
+
+                if (ret == -1) {
+                        ret = real_read (fd, buf, count);
+                }
+
+                if (ret > 0 && ((int64_t) offset) >= 0) {
+                        real_lseek64 (fd, ret + offset, SEEK_SET);
+		}
+
+                booster_put_glfs_fd (glfs_fd);
+        }
+
+        return ret;
+}
+
+
+ssize_t
+readv (int fd, const struct iovec *vector, int count)
+{
+        int ret;
+        long glfs_fd = 0;
+
+        glfs_fd = booster_get_glfs_fd (booster_glfs_fdtable, fd);
+        if (!glfs_fd) {
+                ret = real_readv (fd, vector, count);
+        } else {
+		uint64_t  offset = 0;
+                offset = real_lseek64 (fd, 0L, SEEK_CUR);
+                if ((int64_t)offset != -1) {
+                        ret = glusterfs_lseek (glfs_fd, offset, SEEK_SET);
+                        if (ret != -1) {
+                                ret = glusterfs_readv (glfs_fd, vector, count);
+                        }
+                } else {
+                        ret = -1;
+		} 
+
+		ret = glusterfs_readv (glfs_fd, vector, count);
+                if (ret > 0) {
+                        real_lseek64 (fd, offset + ret, SEEK_SET);
+		} 
+
+                booster_put_glfs_fd (glfs_fd);
+        }
+
+        return ret;
+}
+
+
+ssize_t
+write (int fd, const void *buf, size_t count)
+{
+        int ret;
+        long glfs_fd = 0;
+
+        glfs_fd = booster_get_glfs_fd (booster_glfs_fdtable, fd);
+
+        if (!glfs_fd) {
+                ret = real_write (fd, buf, count);
+        } else {
+		uint64_t offset = 0;
+                offset = real_lseek64 (fd, 0L, SEEK_CUR);
+                if (((int64_t) offset) != -1) {
+                        ret = glusterfs_lseek (glfs_fd, offset, SEEK_SET);
+                        if (ret != -1) {  
+                                ret = glusterfs_write (glfs_fd, buf, count);
+                        }
+                } else {
+                        ret = -1;
+		}
+
+                if (ret == -1) {
+                        ret = real_write (fd, buf, count);
+                }
+
+                if (ret > 0 && ((int64_t) offset) >= 0) {
+                        real_lseek64 (fd, offset + ret, SEEK_SET);
+		}
+                booster_put_glfs_fd (glfs_fd);
+        }
+ 
+        return ret;
+}
+
+ssize_t
+writev (int fd, const struct iovec *vector, int count)
+{
+        int ret = 0;
+        long glfs_fd = 0; 
+
+        glfs_fd = booster_get_glfs_fd (booster_glfs_fdtable, fd);
+
+        if (!glfs_fd) {
+                ret = real_writev (fd, vector, count);
+        } else {
+                uint64_t offset = 0;
+                offset = real_lseek64 (fd, 0L, SEEK_CUR);
+
+                if (((int64_t) offset) != -1) {
+                        ret = glusterfs_lseek (glfs_fd, offset, SEEK_SET);
+                        if (ret != -1) {
+                                ret = glusterfs_writev (glfs_fd, vector, count);
+                        }
+                } else {
+                        ret = -1;
+			} 
+
+/*		ret = glusterfs_writev (glfs_fd, vector, count); */
+                if (ret == -1) {
+                        ret = real_writev (fd, vector, count);
+                }
+
+                if (ret > 0 && ((int64_t)offset) >= 0) {
+                        real_lseek64 (fd, offset + ret, SEEK_SET);
+                }
+
+                booster_put_glfs_fd (glfs_fd);
+        }
+
+        return ret;
+}
+
+
+ssize_t
+pwrite (int fd, const void *buf, size_t count, unsigned long offset)
+{
+        int ret;
+        long glfs_fd = 0;
+
+        assert (real_pwrite != NULL);
+
+        glfs_fd = booster_get_glfs_fd (booster_glfs_fdtable, fd);
+
+        if (!glfs_fd) {
+                ret = real_pwrite (fd, buf, count, offset);
+        } else {
+                ret = glusterfs_pwrite (glfs_fd, buf, count, offset);
+                if (ret == -1) {
+                        ret = real_pwrite (fd, buf, count, offset);
+                }
+                booster_put_glfs_fd (glfs_fd);
+        }
+
+        return ret;
+}
+
+
+ssize_t
+pwrite64 (int fd, const void *buf, size_t count, uint64_t offset)
+{
+        int ret;
+        long glfs_fd = 0;
+
+        glfs_fd = booster_get_glfs_fd (booster_glfs_fdtable, fd);
+  
+        if (!glfs_fd) {
+                ret = real_pwrite64 (fd, buf, count, offset);
+        } else {
+                ret = glusterfs_pwrite (glfs_fd, buf, count, offset);
+                if (ret == -1) {
+                        ret = real_pwrite64 (fd, buf, count, offset);
+                }
+        }
+
+        return ret;
+}
+
+
+int
+close (int fd)
+{
+        int ret = -1;
+        long glfs_fd = 0;
+/*        struct stat st = {0,}; */
+
+/*        ret = fstat (fd, &st); 
+        if (ret != -1) { 
+                libglusterfs_handle_t handle = 0;
+                handle = booster_get_handle (booster_mount_table, st.st_dev);
+                if (handle) { */
+	glfs_fd = booster_get_glfs_fd (booster_glfs_fdtable, fd);
+    
+	if (glfs_fd) {
+		booster_put_fd (booster_glfs_fdtable, fd);
+		ret = glusterfs_close (glfs_fd);
+		booster_put_glfs_fd (glfs_fd);
+	}
+/*}
+  }*/
+
+        ret = real_close (fd);
+
+        return ret;
+}
+
+#ifndef _LSEEK_DECLARED
+#define _LSEEK_DECLARED
+off_t
+lseek (int filedes, unsigned long offset, int whence)
+{
+        int ret;
+        long glfs_fd = 0;
+
+        ret = real_lseek (filedes, offset, whence);
+
+        glfs_fd = booster_get_glfs_fd (booster_glfs_fdtable, filedes);
+        if (glfs_fd) {
+                ret = glusterfs_lseek (glfs_fd, offset, whence);
+                booster_put_glfs_fd (glfs_fd);
+        }
+
+        return ret;
+}
+#endif
+
+off_t
+lseek64 (int filedes, uint64_t offset, int whence)
+{
+        int ret;
+        long glfs_fd = 0;
+
+        ret = real_lseek64 (filedes, offset, whence);
+
+        glfs_fd = booster_get_glfs_fd (booster_glfs_fdtable, filedes);
+        if (glfs_fd) {
+                ret = glusterfs_lseek (glfs_fd, offset, whence);
+                booster_put_glfs_fd (glfs_fd);
+        }
+
+        return ret;
+}
+
+int 
+dup (int oldfd)
+{
+        int ret = -1, new_fd = -1;
+        long glfs_fd = 0;
+
+        glfs_fd = booster_get_glfs_fd (booster_glfs_fdtable, oldfd);
+        new_fd = real_dup (oldfd);
+
+        if (new_fd >=0 && glfs_fd) {
+                ret = booster_get_unused_fd (booster_glfs_fdtable, glfs_fd, new_fd);
+                fd_ref ((fd_t *)glfs_fd);
+                if (ret == -1) {
+                        real_close (new_fd);
+                } 
+        }
+
+        if (glfs_fd) {
+                booster_put_glfs_fd (glfs_fd);
+        }
+
+        return new_fd;
+}
+
+
+int 
+dup2 (int oldfd, int newfd)
+{
+        int ret = -1;
+        long old_glfs_fd = 0, new_glfs_fd = 0;
+
+        if (oldfd == newfd) {
+                return newfd;
+        }
+
+        old_glfs_fd = booster_get_glfs_fd (booster_glfs_fdtable, oldfd);
+        new_glfs_fd = booster_get_glfs_fd (booster_glfs_fdtable, newfd);
+ 
+        ret = real_dup2 (oldfd, newfd); 
+        if (ret >= 0) {
+                if (new_glfs_fd) {
+                        glusterfs_close (new_glfs_fd);
+                        booster_put_glfs_fd (new_glfs_fd);
+                        booster_put_fd (booster_glfs_fdtable, newfd);
+                        new_glfs_fd = 0;
+                }
+
+                if (old_glfs_fd) {
+                        ret = booster_get_unused_fd (booster_glfs_fdtable, old_glfs_fd, newfd);
+                        fd_ref ((fd_t *)old_glfs_fd);
+                        if (ret == -1) {
+                                real_close (newfd);
+                        }
+                }
+        } 
+
+        if (old_glfs_fd) {
+                booster_put_glfs_fd (old_glfs_fd);
+        }
+
+        if (new_glfs_fd) {
+                booster_put_glfs_fd (new_glfs_fd);
+        }
+
+        return ret;
+}
+
+
+#define MOUNT_TABLE_HASH_SIZE 256
+
+
+static int 
+booster_init (void)
+{
+        int i = 0;
+        booster_glfs_fdtable = gf_fd_fdtable_alloc ();
+        if (!booster_glfs_fdtable) {
+                fprintf (stderr, "cannot allocate fdtable: %s\n", strerror (errno));
+		goto err;
+        }
+ 
+        booster_mount_table = calloc (1, sizeof (*booster_mount_table));
+        if (!booster_mount_table) {
+                fprintf (stderr, "cannot allocate memory: %s\n", strerror (errno));
+		goto err;
+        }
+
+        pthread_mutex_init (&booster_mount_table->lock, NULL);
+        booster_mount_table->hash_size = MOUNT_TABLE_HASH_SIZE;
+        booster_mount_table->mounts = calloc (booster_mount_table->hash_size, sizeof (*booster_mount_table->mounts));
+        if (!booster_mount_table->mounts) {
+                fprintf (stderr, "cannot allocate memory: %s\n", strerror (errno));
+		goto err;
+        }
+ 
+        for (i = 0; i < booster_mount_table->hash_size; i++) 
+        {
+                INIT_LIST_HEAD (&booster_mount_table->mounts[i]);
+        }
+
+	return 0;
+
+err:
+	if (booster_glfs_fdtable) {
+		gf_fd_fdtable_destroy (booster_glfs_fdtable);
+		booster_glfs_fdtable = NULL;
+	}
+
+	if (booster_mount_table) {
+		if (booster_mount_table->mounts) {
+			free (booster_mount_table->mounts);
+		}
+
+		free (booster_mount_table);
+		booster_mount_table = NULL;
+	}
+	return -1; 
+}
+
+
+static void
+booster_cleanup (void)
+{
+	int i;
+	booster_mount_t *mount = NULL, *tmp = NULL;
+	
+	/* gf_fd_fdtable_destroy (booster_glfs_fdtable);*/
+	/*for (i=0; i < booster_glfs_fdtable->max_fds; i++) {
+		if (booster_glfs_fdtable->fds[i]) {
+			fd_t *fd = booster_glfs_fdtable->fds[i];
+			free (fd);			  
+		}
+		}*/
+
+	free (booster_glfs_fdtable);
+	booster_glfs_fdtable = NULL;
+
+        pthread_mutex_lock (&booster_mount_table->lock);
+        {
+		for (i = 0; i < booster_mount_table->hash_size; i++) 
+		{
+			list_for_each_entry_safe (mount, tmp, 
+						  &booster_mount_table->mounts[i], device_list) {
+				list_del (&mount->device_list);
+				glusterfs_fini (mount->handle);
+				free (mount);
+			}
+                }
+		free (booster_mount_table->mounts);
+        }
+        pthread_mutex_unlock (&booster_mount_table->lock);
+
+	glusterfs_reset ();
+	free (booster_mount_table);
+	booster_mount_table = NULL;
+}
+
+
+
+pid_t 
+fork (void)
+{
+	pid_t pid = 0;
+	char child = 0;
+
+	glusterfs_log_lock ();
+	{
+		pid = real_fork ();
+	}
+	glusterfs_log_unlock ();
+
+	child = (pid == 0);
+	if (child) {
+		booster_cleanup ();
+		booster_init ();
+	}
+
+	return pid;
+}
+
+
+void
+_init (void)
+{
+	booster_init ();
+
+        RESOLVE (open);
+        RESOLVE (open64);
+        RESOLVE (creat);
+
+        RESOLVE (read);
+        RESOLVE (readv);
+        RESOLVE (pread);
+        RESOLVE (pread64);
+
+        RESOLVE (write);
+        RESOLVE (writev);
+        RESOLVE (pwrite);
+        RESOLVE (pwrite64);
+
+        RESOLVE (lseek);
+        RESOLVE (lseek64);
+
+        RESOLVE (close);
+
+        RESOLVE (dup);
+        RESOLVE (dup2);
+
+	RESOLVE (fork); 
+}
+