vfs-wrap.c

samba-3.0.22.tar.gz 编译smb服务器的源码

	{
		int saved_errno = errno; /* We might get ENOSYS */
		if ((result = SMB_VFS_FCHMOD_ACL(fsp, fd, mode)) == 0) {
			END_PROFILE(syscall_chmod);
			return result;
		}
		/* Error - return the old errno. */
		errno = saved_errno;
	}

#if defined(HAVE_FCHMOD)
	result = fchmod(fd, mode);
#else
	result = -1;
	errno = ENOSYS;
#endif

	END_PROFILE(syscall_fchmod);
	return result;
}

int vfswrap_chown(vfs_handle_struct *handle, connection_struct *conn, const char *path, uid_t uid, gid_t gid)
{
	int result;

	START_PROFILE(syscall_chown);
	result = sys_chown(path, uid, gid);
	END_PROFILE(syscall_chown);
	return result;
}

int vfswrap_fchown(vfs_handle_struct *handle, files_struct *fsp, int fd, uid_t uid, gid_t gid)
{
#ifdef HAVE_FCHOWN
	int result;

	START_PROFILE(syscall_fchown);
	result = fchown(fd, uid, gid);
	END_PROFILE(syscall_fchown);
	return result;
#else
	errno = ENOSYS;
	return -1;
#endif
}

int vfswrap_chdir(vfs_handle_struct *handle, connection_struct *conn, const char *path)
{
	int result;

	START_PROFILE(syscall_chdir);
	result = chdir(path);
	END_PROFILE(syscall_chdir);
	return result;
}

char *vfswrap_getwd(vfs_handle_struct *handle, connection_struct *conn, char *path)
{
	char *result;

	START_PROFILE(syscall_getwd);
	result = sys_getwd(path);
	END_PROFILE(syscall_getwd);
	return result;
}

int vfswrap_utime(vfs_handle_struct *handle, connection_struct *conn, const char *path, struct utimbuf *times)
{
	int result;

	START_PROFILE(syscall_utime);
	result = utime(path, times);
	END_PROFILE(syscall_utime);
	return result;
}

/*********************************************************************
 A version of ftruncate that will write the space on disk if strict
 allocate is set.
**********************************************************************/

static int strict_allocate_ftruncate(vfs_handle_struct *handle, files_struct *fsp, int fd, SMB_OFF_T len)
{
	SMB_STRUCT_STAT st;
	SMB_OFF_T currpos = SMB_VFS_LSEEK(fsp, fd, 0, SEEK_CUR);
	unsigned char zero_space[4096];
	SMB_OFF_T space_to_write;

	if (currpos == -1)
		return -1;

	if (SMB_VFS_FSTAT(fsp, fd, &st) == -1)
		return -1;

	space_to_write = len - st.st_size;

#ifdef S_ISFIFO
	if (S_ISFIFO(st.st_mode))
		return 0;
#endif

	if (st.st_size == len)
		return 0;

	/* Shrink - just ftruncate. */
	if (st.st_size > len)
		return sys_ftruncate(fd, len);

	/* Write out the real space on disk. */
	if (SMB_VFS_LSEEK(fsp, fd, st.st_size, SEEK_SET) != st.st_size)
		return -1;

	space_to_write = len - st.st_size;

	memset(zero_space, '\0', sizeof(zero_space));
	while ( space_to_write > 0) {
		SMB_OFF_T retlen;
		SMB_OFF_T current_len_to_write = MIN(sizeof(zero_space),space_to_write);

		retlen = SMB_VFS_WRITE(fsp,fsp->fh->fd,(char *)zero_space,current_len_to_write);
		if (retlen <= 0)
			return -1;

		space_to_write -= retlen;
	}

	/* Seek to where we were */
	if (SMB_VFS_LSEEK(fsp, fd, currpos, SEEK_SET) != currpos)
		return -1;

	return 0;
}

int vfswrap_ftruncate(vfs_handle_struct *handle, files_struct *fsp, int fd, SMB_OFF_T len)
{
	int result = -1;
	SMB_STRUCT_STAT st;
	char c = 0;
	SMB_OFF_T currpos;

	START_PROFILE(syscall_ftruncate);

	if (lp_strict_allocate(SNUM(fsp->conn))) {
		result = strict_allocate_ftruncate(handle, fsp, fd, len);
		END_PROFILE(syscall_ftruncate);
		return result;
	}

	/* we used to just check HAVE_FTRUNCATE_EXTEND and only use
	   sys_ftruncate if the system supports it. Then I discovered that
	   you can have some filesystems that support ftruncate
	   expansion and some that don't! On Linux fat can't do
	   ftruncate extend but ext2 can. */

	result = sys_ftruncate(fd, len);
	if (result == 0)
		goto done;

	/* According to W. R. Stevens advanced UNIX prog. Pure 4.3 BSD cannot
	   extend a file with ftruncate. Provide alternate implementation
	   for this */
	currpos = SMB_VFS_LSEEK(fsp, fd, 0, SEEK_CUR);
	if (currpos == -1) {
		goto done;
	}

	/* Do an fstat to see if the file is longer than the requested
	   size in which case the ftruncate above should have
	   succeeded or shorter, in which case seek to len - 1 and
	   write 1 byte of zero */
	if (SMB_VFS_FSTAT(fsp, fd, &st) == -1) {
		goto done;
	}

#ifdef S_ISFIFO
	if (S_ISFIFO(st.st_mode)) {
		result = 0;
		goto done;
	}
#endif

	if (st.st_size == len) {
		result = 0;
		goto done;
	}

	if (st.st_size > len) {
		/* the sys_ftruncate should have worked */
		goto done;
	}

	if (SMB_VFS_LSEEK(fsp, fd, len-1, SEEK_SET) != len -1)
		goto done;

	if (SMB_VFS_WRITE(fsp, fd, &c, 1)!=1)
		goto done;

	/* Seek to where we were */
	if (SMB_VFS_LSEEK(fsp, fd, currpos, SEEK_SET) != currpos)
		goto done;
	result = 0;

  done:

	END_PROFILE(syscall_ftruncate);
	return result;
}

BOOL vfswrap_lock(vfs_handle_struct *handle, files_struct *fsp, int fd, int op, SMB_OFF_T offset, SMB_OFF_T count, int type)
{
	BOOL result;

	START_PROFILE(syscall_fcntl_lock);
	result =  fcntl_lock(fd, op, offset, count,type);
	END_PROFILE(syscall_fcntl_lock);
	return result;
}

int vfswrap_symlink(vfs_handle_struct *handle, connection_struct *conn, const char *oldpath, const char *newpath)
{
	int result;

	START_PROFILE(syscall_symlink);
	result = sys_symlink(oldpath, newpath);
	END_PROFILE(syscall_symlink);
	return result;
}

int vfswrap_readlink(vfs_handle_struct *handle, connection_struct *conn, const char *path, char *buf, size_t bufsiz)
{
	int result;

	START_PROFILE(syscall_readlink);
	result = sys_readlink(path, buf, bufsiz);
	END_PROFILE(syscall_readlink);
	return result;
}

int vfswrap_link(vfs_handle_struct *handle, connection_struct *conn, const char *oldpath, const char *newpath)
{
	int result;

	START_PROFILE(syscall_link);
	result = sys_link(oldpath, newpath);
	END_PROFILE(syscall_link);
	return result;
}

int vfswrap_mknod(vfs_handle_struct *handle, connection_struct *conn, const char *pathname, mode_t mode, SMB_DEV_T dev)
{
	int result;

	START_PROFILE(syscall_mknod);
	result = sys_mknod(pathname, mode, dev);
	END_PROFILE(syscall_mknod);
	return result;
}

char *vfswrap_realpath(vfs_handle_struct *handle, connection_struct *conn, const char *path, char *resolved_path)
{
	char *result;

	START_PROFILE(syscall_realpath);
	result = sys_realpath(path, resolved_path);
	END_PROFILE(syscall_realpath);
	return result;
}

size_t vfswrap_fget_nt_acl(vfs_handle_struct *handle, files_struct *fsp, int fd, uint32 security_info, SEC_DESC **ppdesc)
{
	size_t result;

	START_PROFILE(fget_nt_acl);
	result = get_nt_acl(fsp, security_info, ppdesc);
	END_PROFILE(fget_nt_acl);
	return result;
}

size_t vfswrap_get_nt_acl(vfs_handle_struct *handle, files_struct *fsp, const char *name, uint32 security_info, SEC_DESC **ppdesc)
{
	size_t result;

	START_PROFILE(get_nt_acl);
	result = get_nt_acl(fsp, security_info, ppdesc);
	END_PROFILE(get_nt_acl);
	return result;
}

BOOL vfswrap_fset_nt_acl(vfs_handle_struct *handle, files_struct *fsp, int fd, uint32 security_info_sent, SEC_DESC *psd)
{
	BOOL result;

	START_PROFILE(fset_nt_acl);
	result = set_nt_acl(fsp, security_info_sent, psd);
	END_PROFILE(fset_nt_acl);
	return result;
}

BOOL vfswrap_set_nt_acl(vfs_handle_struct *handle, files_struct *fsp, const char *name, uint32 security_info_sent, SEC_DESC *psd)
{
	BOOL result;

	START_PROFILE(set_nt_acl);
	result = set_nt_acl(fsp, security_info_sent, psd);
	END_PROFILE(set_nt_acl);
	return result;
}

int vfswrap_chmod_acl(vfs_handle_struct *handle, connection_struct *conn, const char *name, mode_t mode)
{
#ifdef HAVE_NO_ACL
	errno = ENOSYS;
	return -1;
#else
	int result;

	START_PROFILE(chmod_acl);
	result = chmod_acl(conn, name, mode);
	END_PROFILE(chmod_acl);
	return result;
#endif
}

int vfswrap_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, int fd, mode_t mode)
{
#ifdef HAVE_NO_ACL
	errno = ENOSYS;
	return -1;
#else
	int result;

	START_PROFILE(fchmod_acl);
	result = fchmod_acl(fsp, fd, mode);
	END_PROFILE(fchmod_acl);
	return result;
#endif
}

int vfswrap_sys_acl_get_entry(vfs_handle_struct *handle, connection_struct *conn, SMB_ACL_T theacl, int entry_id, SMB_ACL_ENTRY_T *entry_p)
{
	return sys_acl_get_entry(theacl, entry_id, entry_p);
}

int vfswrap_sys_acl_get_tag_type(vfs_handle_struct *handle, connection_struct *conn, SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *tag_type_p)
{
	return sys_acl_get_tag_type(entry_d, tag_type_p);
}

int vfswrap_sys_acl_get_permset(vfs_handle_struct *handle, connection_struct *conn, SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p)
{
	return sys_acl_get_permset(entry_d, permset_p);
}

void * vfswrap_sys_acl_get_qualifier(vfs_handle_struct *handle, connection_struct *conn, SMB_ACL_ENTRY_T entry_d)
{
	return sys_acl_get_qualifier(entry_d);
}

SMB_ACL_T vfswrap_sys_acl_get_file(vfs_handle_struct *handle, connection_struct *conn, const char *path_p, SMB_ACL_TYPE_T type)
{
	return sys_acl_get_file(path_p, type);
}

SMB_ACL_T vfswrap_sys_acl_get_fd(vfs_handle_struct *handle, files_struct *fsp, int fd)
{
	return sys_acl_get_fd(fd);
}

int vfswrap_sys_acl_clear_perms(vfs_handle_struct *handle, connection_struct *conn, SMB_ACL_PERMSET_T permset)
{
	return sys_acl_clear_perms(permset);
}

int vfswrap_sys_acl_add_perm(vfs_handle_struct *handle, connection_struct *conn, SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)
{
	return sys_acl_add_perm(permset, perm);
}

char * vfswrap_sys_acl_to_text(vfs_handle_struct *handle, connection_struct *conn, SMB_ACL_T theacl, ssize_t *plen)
{
	return sys_acl_to_text(theacl, plen);
}

SMB_ACL_T vfswrap_sys_acl_init(vfs_handle_struct *handle, connection_struct *conn, int count)
{
	return sys_acl_init(count);
}

int vfswrap_sys_acl_create_entry(vfs_handle_struct *handle, connection_struct *conn, SMB_ACL_T *pacl, SMB_ACL_ENTRY_T *pentry)
{
	return sys_acl_create_entry(pacl, pentry);
}

int vfswrap_sys_acl_set_tag_type(vfs_handle_struct *handle, connection_struct *conn, SMB_ACL_ENTRY_T entry, SMB_ACL_TAG_T tagtype)
{
	return sys_acl_set_tag_type(entry, tagtype);
}

int vfswrap_sys_acl_set_qualifier(vfs_handle_struct *handle, connection_struct *conn, SMB_ACL_ENTRY_T entry, void *qual)
{
	return sys_acl_set_qualifier(entry, qual);
}

int vfswrap_sys_acl_set_permset(vfs_handle_struct *handle, connection_struct *conn, SMB_ACL_ENTRY_T entry, SMB_ACL_PERMSET_T permset)
{
	return sys_acl_set_permset(entry, permset);
}

int vfswrap_sys_acl_valid(vfs_handle_struct *handle, connection_struct *conn, SMB_ACL_T theacl )
{
	return sys_acl_valid(theacl );
}

int vfswrap_sys_acl_set_file(vfs_handle_struct *handle, connection_struct *conn, const char *name, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl)
{
	return sys_acl_set_file(name, acltype, theacl);
}

int vfswrap_sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp, int fd, SMB_ACL_T theacl)
{
	return sys_acl_set_fd(fd, theacl);
}

int vfswrap_sys_acl_delete_def_file(vfs_handle_struct *handle, connection_struct *conn, const char *path)
{
	return sys_acl_delete_def_file(path);
}

int vfswrap_sys_acl_get_perm(vfs_handle_struct *handle, connection_struct *conn, SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)
{
	return sys_acl_get_perm(permset, perm);
}

int vfswrap_sys_acl_free_text(vfs_handle_struct *handle, connection_struct *conn, char *text)
{
	return sys_acl_free_text(text);
}

int vfswrap_sys_acl_free_acl(vfs_handle_struct *handle, connection_struct *conn, SMB_ACL_T posix_acl)
{
	return sys_acl_free_acl(posix_acl);
}

int vfswrap_sys_acl_free_qualifier(vfs_handle_struct *handle, connection_struct *conn, void *qualifier, SMB_ACL_TAG_T tagtype)
{
	return sys_acl_free_qualifier(qualifier, tagtype);
}

/****************************************************************
 Extended attribute operations.
*****************************************************************/

ssize_t vfswrap_getxattr(struct vfs_handle_struct *handle,struct connection_struct *conn,const char *path, const char *name, void *value, size_t size)
{
	return sys_getxattr(path, name, value, size);
}

ssize_t vfswrap_lgetxattr(struct vfs_handle_struct *handle,struct connection_struct *conn,const char *path, const char *name, void *value, size_t size)
{
	return sys_lgetxattr(path, name, value, size);
}

ssize_t vfswrap_fgetxattr(struct vfs_handle_struct *handle, struct files_struct *fsp,int fd, const char *name, void *value, size_t size)
{
	return sys_fgetxattr(fd, name, value, size);
}

ssize_t vfswrap_listxattr(struct vfs_handle_struct *handle, struct connection_struct *conn,const char *path, char *list, size_t size)
{
	return sys_listxattr(path, list, size);
}

ssize_t vfswrap_llistxattr(struct vfs_handle_struct *handle, struct connection_struct *conn,const char *path, char *list, size_t size)
{
	return sys_llistxattr(path, list, size);
}

ssize_t vfswrap_flistxattr(struct vfs_handle_struct *handle, struct files_struct *fsp,int fd, char *list, size_t size)
{
	return sys_flistxattr(fd, list, size);
}

int vfswrap_removexattr(struct vfs_handle_struct *handle, struct connection_struct *conn,const char *path, const char *name)
{
	return sys_removexattr(path, name);
}

int vfswrap_lremovexattr(struct vfs_handle_struct *handle, struct connection_struct *conn,const char *path, const char *name)
{
	return sys_lremovexattr(path, name);
}

int vfswrap_fremovexattr(struct vfs_handle_struct *handle, struct files_struct *fsp,int fd, const char *name)
{
	return sys_fremovexattr(fd, name);
}

int vfswrap_setxattr(struct vfs_handle_struct *handle, struct connection_struct *conn,const char *path, const char *name, const void *value, size_t size, int flags)
{
	return sys_setxattr(path, name, value, size, flags);
}

int vfswrap_lsetxattr(struct vfs_handle_struct *handle, struct connection_struct *conn,const char *path, const char *name, const void *value, size_t size, int flags)
{
	return sys_lsetxattr(path, name, value, size, flags);
}

int vfswrap_fsetxattr(struct vfs_handle_struct *handle, struct files_struct *fsp,int fd, const char *name, const void *value, size_t size, int flags)
{
	return sys_fsetxattr(fd, name, value, size, flags);
}

int vfswrap_aio_read(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb)
{
	return sys_aio_read(aiocb);
}

int vfswrap_aio_write(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb)
{
	return sys_aio_write(aiocb);
}

ssize_t vfswrap_aio_return(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb)
{
	return sys_aio_return(aiocb);
}

int vfswrap_aio_cancel(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_STRUCT_AIOCB *aiocb)
{
	return sys_aio_cancel(fd, aiocb);
}

int vfswrap_aio_error(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb)
{
	return sys_aio_error(aiocb);
}

int vfswrap_aio_fsync(struct vfs_handle_struct *handle, struct files_struct *fsp, int op, SMB_STRUCT_AIOCB *aiocb)
{
	return sys_aio_fsync(op, aiocb);
}

int vfswrap_aio_suspend(struct vfs_handle_struct *handle, struct files_struct *fsp, const SMB_STRUCT_AIOCB * const aiocb[], int n, const struct timespec *timeout)
{
	return sys_aio_suspend(aiocb, n, timeout);
}