Add system call abstraction layer

- syscall.c provides platform-independent system calls
- previous code for this from compat.c removed
- posix xlator uses new functions from syscall.c
- solaris_flistxattr added to compat.c

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

5 files changed, 637 insertions, 23 deletions

diff --git a/libglusterfs/src/Makefile.am b/libglusterfs/src/Makefile.am
index 16e6717de9e..982c4d69de9 100644
--- a/libglusterfs/src/Makefile.am
+++ b/libglusterfs/src/Makefile.am
@@ -6,9 +6,9 @@ libglusterfs_la_LIBADD = @LEXLIB@
 
 lib_LTLIBRARIES = libglusterfs.la
 
-libglusterfs_la_SOURCES = dict.c spec.lex.c y.tab.c xlator.c logging.c  hashfn.c defaults.c scheduler.c common-utils.c transport.c timer.c inode.c call-stub.c compat.c authenticate.c fd.c compat-errno.c event.c mem-pool.c gf-dirent.c
+libglusterfs_la_SOURCES = dict.c spec.lex.c y.tab.c xlator.c logging.c  hashfn.c defaults.c scheduler.c common-utils.c transport.c timer.c inode.c call-stub.c compat.c authenticate.c fd.c compat-errno.c event.c mem-pool.c gf-dirent.c syscall.c
 
-noinst_HEADERS = common-utils.h defaults.h dict.h glusterfs.h hashfn.h logging.h protocol.h scheduler.h xlator.h transport.h stack.h timer.h list.h inode.h call-stub.h compat.h authenticate.h fd.h revision.h compat-errno.h event.h mem-pool.h byte-order.h gf-dirent.h locking.h
+noinst_HEADERS = common-utils.h defaults.h dict.h glusterfs.h hashfn.h logging.h protocol.h scheduler.h xlator.h transport.h stack.h timer.h list.h inode.h call-stub.h compat.h authenticate.h fd.h revision.h compat-errno.h event.h mem-pool.h byte-order.h gf-dirent.h locking.h syscall.h
 
 EXTRA_DIST = spec.l spec.y
 
diff --git a/libglusterfs/src/compat.c b/libglusterfs/src/compat.c
index f0bd9119c7c..bad62b563d5 100644
--- a/libglusterfs/src/compat.c
+++ b/libglusterfs/src/compat.c
@@ -264,6 +264,61 @@ solaris_listxattr(const char *path,
 	return len;
 }
 
+
+int
+solaris_flistxattr(int fd,
+                   char *list, 
+                   size_t size)
+{
+	int attrdirfd = -1;
+	ssize_t len = 0;
+	DIR *dirptr = NULL;
+	struct dirent *dent = NULL;
+	int newfd = -1;
+	
+	attrdirfd = openat (fd, ".", O_RDONLY, 0);
+	if (attrdirfd >= 0) {
+		newfd = dup(attrdirfd);
+		dirptr = fdopendir(newfd);
+		if (dirptr) {
+			while ((dent = readdir(dirptr))) {
+				size_t listlen = strlen(dent->d_name);
+				if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, "..")) {
+					/* we don't want "." and ".." here */
+					continue;
+				}
+				if (size == 0) {
+					/* return the current size of the list of extended attribute names*/
+					len += listlen + 1;
+				} else {
+					/* check size and copy entrie + nul into list. */
+					if ((len + listlen + 1) > size) {
+						errno = ERANGE;
+						len = -1;
+						break;
+					} else {
+						strncpy(list + len, dent->d_name, listlen);
+						len += listlen;
+						list[len] = '\0';
+						++len;
+					}
+				}
+			}
+			
+			if (closedir(dirptr) == -1) {
+				close (attrdirfd);
+				return -1;
+			}
+		} else {
+			close (attrdirfd);
+			return -1;
+		}
+		close (attrdirfd);
+	}
+	return len;
+}
+
+
 int 
 solaris_removexattr(const char *path, 
 		    const char* key)
diff --git a/libglusterfs/src/compat.h b/libglusterfs/src/compat.h
index 67f8138b1df..42d2fa1419e 100644
--- a/libglusterfs/src/compat.h
+++ b/libglusterfs/src/compat.h
@@ -107,14 +107,6 @@ enum {
 #  endif
 # endif
         
-#define lremovexattr(path,key)               extattr_delete_link(path, EXTATTR_NAMESPACE_USER, key)
-#define llistxattr(path,key,size)            extattr_list_link(path, EXTATTR_NAMESPACE_USER, key, size)
-#define lgetxattr(path, key, value, size)    extattr_get_link(path, EXTATTR_NAMESPACE_USER, key, value, size)
-#define lsetxattr(path,key,value,size,flags) extattr_set_link(path, EXTATTR_NAMESPACE_USER, key, value, size)
-#define fgetxattr(fd,key,value,size)         extattr_get_fd(fd, EXTATTR_NAMESPACE_USER, key, value, size)
-#define fsetxattr(fd,key,value,size,flag)    extattr_set_fd(fd, EXTATTR_NAMESPACE_USER, key, value, size)
-
-
 #define F_GETLK64       F_GETLK
 #define F_SETLK64       F_SETLK
 #define F_SETLKW64      F_SETLKW
@@ -168,13 +160,6 @@ enum {
 #  endif
 # endif
 
-#define llistxattr(path,key,size)               listxattr(path,key,size,XATTR_NOFOLLOW)
-#define lgetxattr(path,key,value,size)          getxattr(path,key,value,size,0,XATTR_NOFOLLOW)
-#define lsetxattr(path,key,value,size,flags)    setxattr(path,key,value,size,0,flags|XATTR_NOFOLLOW)
-#define lremovexattr(path,key)                  removexattr(path,key,XATTR_NOFOLLOW)
-#define fgetxattr(path,key,value,size)          fgetxattr(path,key,value,size,0,0)
-#define fsetxattr(path,key,value,size,flag)     fsetxattr(path,key,value,size,0,flag)
-
 #define F_GETLK64       F_GETLK
 #define F_SETLK64       F_SETLK
 #define F_SETLKW64      F_SETLKW
@@ -231,12 +216,6 @@ enum {
 #define s6_addr32       _S6_un._S6_u32
 #endif
 
-#define lremovexattr(path,key)               solaris_removexattr(path,key)
-#define llistxattr(path,key,size)            solaris_listxattr(path,key,size)
-#define lgetxattr(path,key,value,size)       solaris_getxattr(path,key,value,size)
-#define lsetxattr(path,key,value,size,flags) solaris_setxattr(path,key,value,size,flags)
-#define fgetxattr(fd,key,value,size)         solaris_fgetxattr(fd,key,value,size)
-#define fsetxattr(fd,key,value,size,flags)   solaris_fsetxattr(fd,key,value,size,flags)
 #define lutimes(filename,times)              utimes(filename,times)
 
 int asprintf(char **string_ptr, const char *format, ...); 
diff --git a/libglusterfs/src/syscall.c b/libglusterfs/src/syscall.c
new file mode 100644
index 00000000000..f8e8c939a77
--- /dev/null
+++ b/libglusterfs/src/syscall.c
@@ -0,0 +1,432 @@
+/*
+  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 _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "compat.h"
+#include "syscall.h"
+
+#include <sys/types.h>
+#include <utime.h>
+#include <sys/time.h>
+
+int
+sys_lstat (const char *path, struct stat *buf)
+{
+        return lstat (path, buf);
+}
+
+
+int
+sys_stat (const char *path, struct stat *buf)
+{
+        return stat (path, buf);
+}
+
+
+int 
+sys_fstat (int fd, struct stat *buf)
+{
+        return fstat (fd, buf);
+}
+
+
+DIR *
+sys_opendir (const char *name)
+{
+        return opendir (name);
+}
+
+
+struct dirent *
+sys_readdir (DIR *dir)
+{
+        return readdir (dir);
+}
+
+
+ssize_t 
+sys_readlink (const char *path, char *buf, size_t bufsiz)
+{
+        return readlink (path, buf, bufsiz);
+}
+
+
+int 
+sys_closedir (DIR *dir)
+{
+        return closedir (dir);
+}
+
+
+int
+sys_mknod (const char *pathname, mode_t mode, dev_t dev)
+{
+        return mknod (pathname, mode, dev);
+}
+
+
+int 
+sys_mkdir (const char *pathname, mode_t mode)
+{
+        return mkdir (pathname, mode);
+}
+
+
+int 
+sys_unlink (const char *pathname)
+{
+        return unlink (pathname);
+}
+
+
+int 
+sys_rmdir (const char *pathname)
+{
+        return rmdir (pathname);
+}
+
+
+int 
+sys_symlink (const char *oldpath, const char *newpath)
+{
+        return symlink (oldpath, newpath);
+}
+
+
+int
+sys_rename (const char *oldpath, const char *newpath)
+{
+        return rename (oldpath, newpath);
+}
+
+
+int 
+sys_link (const char *oldpath, const char *newpath)
+{
+        return link (oldpath, newpath);
+}
+
+
+int
+sys_chmod (const char *path, mode_t mode)
+{
+        return chmod (path, mode);
+}
+
+
+int
+sys_fchmod (int fd, mode_t mode)
+{
+        return fchmod (fd, mode);
+}
+
+
+int 
+sys_chown (const char *path, uid_t owner, gid_t group)
+{
+        return chown (path, owner, group);
+}
+
+
+int
+sys_fchown (int fd, uid_t owner, gid_t group)
+{
+        return fchown (fd, owner, group);
+}
+
+
+int
+sys_lchown (const char *path, uid_t owner, gid_t group)
+{
+        return lchown (path, owner, group);
+}
+
+
+int 
+sys_truncate (const char *path, off_t length)
+{
+        return truncate (path, length);
+}
+
+
+int 
+sys_ftruncate (int fd, off_t length)
+{
+        return ftruncate (fd, length);
+}
+
+
+int 
+sys_utimes (const char *filename, const struct timeval times[2])
+{
+        return utimes (filename, times);
+}
+
+
+int
+sys_creat (const char *pathname, mode_t mode)
+{
+        return creat (pathname, mode);
+}
+
+
+ssize_t
+sys_readv (int fd, const struct iovec *iov, int iovcnt)
+{
+        return readv (fd, iov, iovcnt);
+}
+
+
+ssize_t
+sys_writev (int fd, const struct iovec *iov, int iovcnt)
+{
+        return writev (fd, iov, iovcnt);
+}
+
+
+ssize_t
+sys_read (int fd, void *buf, size_t count)
+{
+        return read (fd, buf, count);
+}
+
+
+ssize_t 
+sys_write (int fd, const void *buf, size_t count)
+{
+        return write (fd, buf, count);
+}
+
+
+off_t
+sys_lseek (int fd, off_t offset, int whence)
+{
+        return lseek (fd, offset, whence);
+}
+
+
+int
+sys_statvfs (const char *path, struct statvfs *buf)
+{
+        return statvfs (path, buf);
+}
+
+
+int 
+sys_close (int fd)
+{
+        return close (fd);
+}
+
+
+int 
+sys_fsync (int fd)
+{
+        return fsync (fd);
+}
+
+
+int 
+sys_fdatasync (int fd)
+{
+#ifdef HAVE_FDATASYNC
+        return fdatasync (fd);
+#else
+        return 0;
+#endif
+}
+
+
+int 
+sys_lsetxattr (const char *path, const char *name, const void *value, 
+               size_t size, int flags) 
+{
+        
+#ifdef GF_LINUX_HOST_OS
+        return lsetxattr (path, name, value, size, flags);
+#endif
+
+#ifdef GF_BSD_HOST_OS
+        return extattr_set_link (path, EXTATTR_NAMESPACE_USER, 
+                                 name, value, size);
+#endif
+        
+#ifdef GF_SOLARIS_HOST_OS
+        return solaris_setxattr (path, name, value, size, flags);
+#endif
+
+#ifdef GF_DARWIN_HOST_OS
+        return setxattr (path, name, value, size, 0, 
+                         flags|XATTR_NOFOLLOW);
+#endif
+        
+}
+
+
+ssize_t
+sys_llistxattr (const char *path, char *list, size_t size) 
+{
+        
+#ifdef GF_LINUX_HOST_OS
+        return llistxattr (path, list, size);
+#endif
+
+#ifdef GF_BSD_HOST_OS
+        return extattr_list_link (path, EXTATTR_NAMESPACE_USER, list, size);
+#endif
+        
+#ifdef GF_SOLARIS_HOST_OS
+        return solaris_listxattr (path, list, size);
+#endif
+
+#ifdef GF_DARWIN_HOST_OS
+        return listxattr (path, list, size, XATTR_NOFOLLOW);
+#endif
+        
+}
+
+
+ssize_t
+sys_lgetxattr (const char *path, const char *name, void *value, size_t size) 
+{
+        
+#ifdef GF_LINUX_HOST_OS
+        return lgetxattr (path, name, value, size);
+#endif
+
+#ifdef GF_BSD_HOST_OS
+        return extattr_get_link (path, EXTATTR_NAMESPACE_USER, name, value, 
+                                 size);
+#endif
+        
+#ifdef GF_SOLARIS_HOST_OS
+        return solaris_getxattr (path, name, value, size);
+#endif
+
+#ifdef GF_DARWIN_HOST_OS
+        return getxattr (path, name, value, size, 0, XATTR_NOFOLLOW);
+#endif
+
+}
+
+
+ssize_t 
+sys_fgetxattr (int filedes, const char *name, void *value, size_t size) 
+{
+        
+#ifdef GF_LINUX_HOST_OS
+        return fgetxattr (filedes, name, value, size);
+#endif
+
+#ifdef GF_BSD_HOST_OS
+        return extattr_get_fd (filedes, EXTATTR_NAMESPACE_USER, name, 
+                               value, size);
+#endif
+        
+#ifdef GF_SOLARIS_HOST_OS
+        return solaris_fgetxattr (filedes, name, value, size);
+#endif
+
+#ifdef GF_DARWIN_HOST_OS
+        return fgetxattr (filedes, name, value, size, 0, 0);
+#endif
+
+}
+
+
+int 
+sys_fsetxattr (int filedes, const char *name, const void *value, 
+               size_t size, int flags)
+{
+
+#ifdef GF_LINUX_HOST_OS
+        return fsetxattr (filedes, name, value, size, flags);
+#endif
+
+#ifdef GF_BSD_HOST_OS
+        return extattr_set_fd (filedes, EXTATTR_NAMESPACE_USER, name, 
+                               value, size);
+#endif
+        
+#ifdef GF_SOLARIS_HOST_OS
+        solaris_fsetxattr (filedes, name, value, size, flags);
+#endif
+
+#ifdef GF_DARWIN_HOST_OS
+        return fsetxattr (filedes, name, value, size, 0, flags);
+#endif
+
+}
+
+
+ssize_t 
+sys_flistxattr (int filedes, char *list, size_t size) 
+{
+        
+#ifdef GF_LINUX_HOST_OS
+        return flistxattr (filedes, list, size);
+#endif
+
+#ifdef GF_BSD_HOST_OS
+        return extattr_list_fd (filedes, EXTATTR_NAMESPACE_USER, list, size);
+#endif
+
+#ifdef GF_SOLARIS_HOST_OS
+        return solaris_flistxattr (filedes, list, size);
+#endif
+
+#ifdef GF_DARWIN_HOST_OS
+        return flistxattr (filedes, list, size, XATTR_NOFOLLOW);
+#endif
+
+}
+
+
+int 
+sys_lremovexattr (const char *path, const char *name)
+{
+        
+#ifdef GF_LINUX_HOST_OS
+        return lremovexattr (path, name);
+#endif
+
+#ifdef GF_BSD_HOST_OS
+        return extattr_delete_link (path, EXTATTR_NAMESPACE_USER, name);
+#endif
+        
+#ifdef GF_SOLARIS_HOST_OS
+        return solaris_removexattr (path, name);
+#endif
+
+#ifdef GF_DARWIN_HOST_OS
+        return removexattr (path, name, XATTR_NOFOLLOW);
+#endif
+
+}
+
+
+int 
+sys_access (const char *pathname, int mode)
+{
+        return access (pathname, mode);
+}
diff --git a/libglusterfs/src/syscall.h b/libglusterfs/src/syscall.h
new file mode 100644
index 00000000000..d9cbb8fd41a
--- /dev/null
+++ b/libglusterfs/src/syscall.h
@@ -0,0 +1,148 @@
+/*
+  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 __SYSCALL_H__
+#define __SYSCALL_H__
+
+int
+sys_lstat (const char *path, struct stat *buf);
+
+int
+sys_stat (const char *path, struct stat *buf);
+
+int 
+sys_fstat (int fd, struct stat *buf);
+
+DIR *
+sys_opendir (const char *name);
+
+struct dirent *
+sys_readdir (DIR *dir);
+
+ssize_t 
+sys_readlink (const char *path, char *buf, size_t bufsiz);
+
+int 
+sys_closedir (DIR *dir);
+
+int
+sys_mknod (const char *pathname, mode_t mode, dev_t dev);
+
+int 
+sys_mkdir (const char *pathname, mode_t mode);
+
+int 
+sys_unlink (const char *pathname);
+
+int 
+sys_rmdir (const char *pathname);
+
+int 
+sys_symlink (const char *oldpath, const char *newpath);
+
+int
+sys_rename (const char *oldpath, const char *newpath);
+
+int 
+sys_link (const char *oldpath, const char *newpath);
+
+int
+sys_chmod (const char *path, mode_t mode);
+
+int
+sys_fchmod (int fd, mode_t mode);
+
+int 
+sys_chown (const char *path, uid_t owner, gid_t group);
+
+int
+sys_fchown (int fd, uid_t owner, gid_t group);
+
+int
+sys_lchown (const char *path, uid_t owner, gid_t group);
+
+int 
+sys_truncate (const char *path, off_t length);
+
+int 
+sys_ftruncate (int fd, off_t length);
+
+int 
+sys_utimes (const char *filename, const struct timeval times[2]);
+
+int
+sys_creat (const char *pathname, mode_t mode);
+
+ssize_t
+sys_readv (int fd, const struct iovec *iov, int iovcnt);
+
+ssize_t
+sys_writev (int fd, const struct iovec *iov, int iovcnt);
+
+ssize_t
+sys_read (int fd, void *buf, size_t count);
+
+ssize_t 
+sys_write (int fd, const void *buf, size_t count);
+
+off_t
+sys_lseek (int fd, off_t offset, int whence);
+
+int
+sys_statvfs (const char *path, struct statvfs *buf);
+
+int 
+sys_close (int fd);
+
+int 
+sys_fsync (int fd);
+
+int 
+sys_fdatasync (int fd);
+
+int 
+sys_lsetxattr (const char *path, const char *name, const void *value, 
+               size_t size, int flags); 
+
+ssize_t
+sys_llistxattr (const char *path, char *list, size_t size); 
+
+ssize_t
+sys_lgetxattr (const char *path, const char *name, void *value, size_t size); 
+
+ssize_t 
+sys_fgetxattr (int filedes, const char *name, void *value, size_t size); 
+
+int 
+sys_fsetxattr (int filedes, const char *name, const void *value, 
+               size_t size, int flags);
+
+ssize_t 
+sys_flistxattr (int filedes, char *list, size_t size); 
+
+int 
+sys_lremovexattr (const char *path, const char *name);
+
+int 
+sys_access (const char *pathname, int mode);
+
+int 
+sys_ftruncate (int fd, off_t length);
+
+#endif /* __SYSCALL_H__ */