Revert "Add a gpfs_prefetch module"

This reverts commit fc9b30bed2d774dca6660b497cb50f982b23b885.

Sorry, this got pushed by accident:

"This can not go upstream yet because it uses the non-GPL libgpfs."

Michael
(This used to be commit 26a3cf0be918fe577a979f3e358d58359e42b2f1)

1 files changed, 0 insertions, 308 deletions

diff --git a/source3/modules/vfs_gpfs_prefetch.c b/source3/modules/vfs_gpfs_prefetch.c
deleted file mode 100644
index 77f265fc24..0000000000
--- a/source3/modules/vfs_gpfs_prefetch.c
+++ /dev/null
@@ -1,308 +0,0 @@
-/*
-   Unix SMB/CIFS implementation.
-   Make use of gpfs prefetch functionality
-
-   Copyright (C) Volker Lendecke 2008
-
-   This program 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.
-
-   This program 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/>.
-
-*/
-
-#include "includes.h"
-
-#undef DBGC_CLASS
-#define DBGC_CLASS DBGC_VFS
-
-#include <gpfs.h>
-#include <gpfs_fcntl.h>
-
-static int (*gpfs_fcntl_fn)(int fd, void *arg);
-
-static int smbd_gpfs_fcntl(int fd, void *arg)
-{
-	static void *libgpfs_handle = NULL;
-
-	DEBUG(10, ("smbd_gpfs_fcntl called for %d\n", fd));
-
-	if (gpfs_fcntl_fn == NULL) {
-		libgpfs_handle = sys_dlopen("libgpfs.so", RTLD_LAZY);
-
-		if (libgpfs_handle == NULL) {
-			DEBUG(10, ("sys_dlopen for libgpfs failed: %s\n",
-				   strerror(errno)));
-			return;
-		}
-
-		gpfs_fcntl_fn = sys_dlsym(libgpfs_handle, "gpfs_fcntl");
-		if (gpfs_fcntl_fn == NULL) {
-			DEBUG(3, ("libgpfs.so does not contain the symbol "
-				  "'gpfs_fcntl'\n"));
-			errno = ENOSYS;
-			return -1;
-		}
-	}
-
-	return gpfs_fcntl_fn(fd, arg);
-}
-
-struct gpfs_prefetch_config {
-	name_compare_entry *namelist;
-	size_t size;
-};
-
-struct gpfs_prefetch_hints {
-	blksize_t st_blksize;
-	/*
-	 * The current center around which config->size bytes are
-	 * prefetched
-	 */
-	SMB_OFF_T center;
-};
-
-static void gpfs_prefetch_recenter(vfs_handle_struct *handle,
-				   files_struct *fsp,
-				   SMB_OFF_T offset, size_t size,
-				   struct gpfs_prefetch_hints *hints)
-{
-	int ret;
-	SMB_OFF_T new_center;
-
-	struct {
-		gpfsFcntlHeader_t hdr;
-		gpfsMultipleAccessRange_t acc;
-	} arg;
-
-
-	if (hints->st_blksize == 0) {
-		SMB_STRUCT_STAT sbuf;
-
-		if (SMB_VFS_NEXT_FSTAT(handle, fsp, &sbuf) == -1) {
-			return;
-		}
-		DEBUG(10, ("gpfs_prefetch_recenter: st_blksize = %d\n",
-			   (int)sbuf.st_blksize));
-		hints->st_blksize = sbuf.st_blksize;
-	}
-
-	new_center = (offset > size) ? offset : 0;
-
-	DEBUG(10, ("gpfs_prefetch_recenter: size=%d, offset=%d, "
-		   "old_center=%d, new_center=%d\n", (int)size, (int)offset,
-		   (int)hints->center, (int)new_center));
-
-	ZERO_STRUCT(arg);
-
-	arg.hdr.totalLength = sizeof(arg);
-	arg.hdr.fcntlVersion = GPFS_FCNTL_CURRENT_VERSION;
-	arg.hdr.fcntlReserved = 0;
-	arg.acc.structLen = sizeof(arg.acc);
-	arg.acc.structType = GPFS_MULTIPLE_ACCESS_RANGE;
-	arg.acc.accRangeCnt = 1;
-	arg.acc.relRangeCnt = 1;
-
-	arg.acc.accRangeArray[0].blockNumber = new_center/hints->st_blksize;
-	arg.acc.accRangeArray[0].start = 0;
-	arg.acc.accRangeArray[0].length = size;
-	arg.acc.accRangeArray[0].isWrite = 0;
-
-	arg.acc.relRangeArray[0].blockNumber = hints->center/hints->st_blksize;
-	arg.acc.relRangeArray[0].start = 0;
-	arg.acc.relRangeArray[0].length = size;
-	arg.acc.relRangeArray[0].isWrite = 0;
-
-	ret = smbd_gpfs_fcntl(fsp->fh->fd, &arg);
-	if (ret == -1) {
-		DEBUG(5, ("gpfs_fcntl returned %s\n", strerror(errno)));
-	}
-
-	hints->center = new_center;
-}
-
-static ssize_t gpfs_prefetch_pread(vfs_handle_struct *handle,
-				   files_struct *fsp, void *data,
-				   size_t n, SMB_OFF_T offset)
-{
-	struct gpfs_prefetch_config *config =
-		(struct gpfs_prefetch_config *)handle->data;
-	struct gpfs_prefetch_hints *hints = (struct gpfs_prefetch_hints *)
-		VFS_FETCH_FSP_EXTENSION(handle, fsp);
-	SMB_OFF_T out_of_center;
-
-	/*
-	 * How far away from the center of the prefetch region is the
-	 * request?
-	 */
-
-	out_of_center = (offset > hints->center)
-		? (offset - hints->center) : (hints->center - offset);
-
-	DEBUG(10, ("gpfs_prefetch_pread: n=%d, offset=%d, center=%d, "
-		   "out_of_center=%d, size=%d\n", (int)n, (int)offset,
-		   (int)hints->center, (int)out_of_center,
-		   (int)config->size));
-	/*
-	 * Are we completely out of the prefetch range or less than
-	 * 10% at its borders?
-	 */
-
-	if ((out_of_center > config->size)
-	    || ((config->size - out_of_center) * 10 < config->size)) {
-		/*
-		 * Re-center the prefetch area
-		 */
-		gpfs_prefetch_recenter(handle, fsp, offset, config->size,
-				       hints);
-	}
-
-	return SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
-}
-
-static int gpfs_prefetch_open(vfs_handle_struct *handle,  const char *fname,
-			      files_struct *fsp, int flags, mode_t mode)
-{
-	int fd, ret;
-	struct gpfs_prefetch_hints *hints;
-	struct gpfs_prefetch_config *config =
-		(struct gpfs_prefetch_config *)handle->data;
-
-	struct {
-		gpfsFcntlHeader_t hdr;
-		gpfsAccessRange_t acc;
-	} arg;
-
-	DEBUG(10, ("gpfs_prefetch_open called for %s, config=%p, "
-		   "config->namelist = %p, config->size=%d\n", fname,
-		   config, config->namelist, (int)config->size));
-
-	if (!is_in_path(fname, config->namelist,
-			handle->conn->case_sensitive)) {
-		DEBUG(10, ("gpfs_prefetch_open not in list: %s\n", fname));
-		return SMB_VFS_NEXT_OPEN(handle, fname, fsp, flags, mode);
-	}
-
-	hints = (struct gpfs_prefetch_hints *)VFS_ADD_FSP_EXTENSION(
-		handle, fsp, struct gpfs_prefetch_hints);
-	if (hints == NULL) {
-		errno = ENOMEM;
-		return -1;
-	}
-
-	fd = SMB_VFS_NEXT_OPEN(handle, fname, fsp, flags, mode);
-	if (fd == -1) {
-		VFS_REMOVE_FSP_EXTENSION(handle, fsp);
-		return -1;
-	}
-
-	arg.hdr.totalLength = sizeof(arg);
-	arg.hdr.fcntlVersion = GPFS_FCNTL_CURRENT_VERSION;
-	arg.hdr.fcntlReserved = 0;
-	arg.acc.structLen = sizeof(arg.acc);
-	arg.acc.structType = GPFS_ACCESS_RANGE;
-	arg.acc.start = 0;
-	arg.acc.length = 1;
-	arg.acc.isWrite = 0;
-
-	ret = smbd_gpfs_fcntl(fd, &arg);
-	if (ret == -1) {
-		DEBUG(5, ("gpfs_fcntl returned %s\n", strerror(errno)));
-	}
-
-	hints->st_blksize = 0;
-	hints->center = 0;
-
-	return fd;
-}
-
-static void gpfs_prefetch_config_free(void **data)
-{
-	struct gpfs_prefetch_config **config =
-		(struct gpfs_prefetch_config **)data;
-
-	free_namearray((*config)->namelist);
-	TALLOC_FREE(*config);
-}
-
-static int gpfs_prefetch_connect(struct vfs_handle_struct *handle,
-				 const char *service,
-				 const char *user)
-{
-	struct gpfs_prefetch_config *config;
-	const char *mask;
-
-	config = talloc(handle, struct gpfs_prefetch_config);
-	if (config == NULL) {
-		DEBUG(0, ("talloc failed\n"));
-		errno = ENOMEM;
-		return -1;
-	}
-
-	mask = lp_parm_const_string(SNUM(handle->conn), "gpfs_prefetch",
-				    "mask", "");
-
-	set_namearray(&config->namelist, mask);
-	config->size = lp_parm_int(SNUM(handle->conn), "gpfs_prefetch",
-				   "size", 1024);
-
-	/*
-	 * The size calculations in the core routines assume that
-	 * config->size is the size from the center to the border of
-	 * the prefetched area. So we need to multiply by 1024/2 here
-	 * to get the whole prefetch area in kilobytes.
-	 */
-	config->size *= 1024/2;
-
-	SMB_VFS_HANDLE_SET_DATA(handle, config, gpfs_prefetch_config_free,
-				struct gpfs_prefetch_config, goto fail);
-
-	return SMB_VFS_NEXT_CONNECT(handle, service, user);
-
-fail:
-	free_namearray(config->namelist);
-	TALLOC_FREE(config);
-	return -1;
-}
-
-/* VFS operations structure */
-
-static vfs_op_tuple gpfs_prefetch_op_tuples[] = {
-
-	{SMB_VFS_OP(gpfs_prefetch_open),	SMB_VFS_OP_OPEN,
-	 SMB_VFS_LAYER_TRANSPARENT },
-	{SMB_VFS_OP(gpfs_prefetch_pread),	SMB_VFS_OP_PREAD,
-	 SMB_VFS_LAYER_TRANSPARENT },
-	{SMB_VFS_OP(gpfs_prefetch_connect),	SMB_VFS_OP_CONNECT,
-	 SMB_VFS_LAYER_TRANSPARENT },
-
-        { SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP }
-};
-
-/*
- * When done properly upstream (GPL issue resolved), change this
- * routine name to vfs_gpfs_prefetch_init!!
- */
-
-NTSTATUS init_samba_module(void);
-NTSTATUS init_samba_module(void)
-{
-	NTSTATUS status;
-
-	DEBUG(10, ("vfs_gpfs_prefetch_init called\n"));
-
-	status = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "gpfs_prefetch",
-				  gpfs_prefetch_op_tuples);
-	DEBUG(10, ("smb_register_vfs returned %s\n",
-		   nt_errstr(status)));
-
-	return status;
-}