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authorVolker Lendecke <vl@samba.org>2011-05-04 15:48:27 +0200
committerVolker Lendecke <vl@samba.org>2011-05-04 16:11:30 +0200
commit3f68b43dd56b8f338a18074741162bf6437ae78d (patch)
tree8ef23222cbba1a7f49fba1933c081ca9ae01dc72 /source3/modules
parent41bde55821a6c18ace24330aede8d4928215e658 (diff)
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vfs_gpfs: Properly notify the offline->online changes
This needs to be a separate module that cooperates with vfs_gpfs. If aio_fork is used early in the module chain it (correctly) does not propagate the aio ops down, so vfs_gpfs does not see them. This slim module must come early in the chain for notifies to work properly.
Diffstat (limited to 'source3/modules')
-rw-r--r--source3/modules/vfs_gpfs_hsm_notify.c110
1 files changed, 110 insertions, 0 deletions
diff --git a/source3/modules/vfs_gpfs_hsm_notify.c b/source3/modules/vfs_gpfs_hsm_notify.c
new file mode 100644
index 0000000000..fa24db9983
--- /dev/null
+++ b/source3/modules/vfs_gpfs_hsm_notify.c
@@ -0,0 +1,110 @@
+/*
+ Unix SMB/CIFS implementation.
+ Make sure offline->online changes are propagated by notifies
+
+ This module must come before aio_fork in the chain, because
+ aio_fork (correcly!) does not propagate the aio calls further
+
+ Copyright (C) Volker Lendecke 2011
+
+ 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"
+#include "smbd/smbd.h"
+#include "librpc/gen_ndr/ndr_xattr.h"
+#include "include/smbprofile.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_VFS
+
+#include <gpfs_gpl.h>
+#include "nfs4_acls.h"
+#include "vfs_gpfs.h"
+
+static ssize_t vfs_gpfs_hsm_notify_pread(vfs_handle_struct *handle, files_struct *fsp,
+ void *data, size_t n, SMB_OFF_T offset)
+{
+ ssize_t ret;
+
+ ret = SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
+
+ DEBUG(10, ("vfs_private = %x\n",
+ (unsigned int)fsp->fsp_name->st.vfs_private));
+
+ if ((ret != -1) &&
+ ((fsp->fsp_name->st.vfs_private & GPFS_WINATTR_OFFLINE) != 0)) {
+ fsp->fsp_name->st.vfs_private &= ~GPFS_WINATTR_OFFLINE;
+ notify_fname(handle->conn, NOTIFY_ACTION_MODIFIED,
+ FILE_NOTIFY_CHANGE_ATTRIBUTES,
+ fsp->fsp_name->base_name);
+ }
+
+ return ret;
+}
+
+static ssize_t vfs_gpfs_hsm_notify_pwrite(struct vfs_handle_struct *handle,
+ struct files_struct *fsp,
+ const void *data, size_t n, SMB_OFF_T offset)
+{
+ ssize_t ret;
+
+ ret = SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
+
+ if ((ret != -1) &&
+ ((fsp->fsp_name->st.vfs_private & GPFS_WINATTR_OFFLINE) != 0)) {
+ fsp->fsp_name->st.vfs_private &= ~GPFS_WINATTR_OFFLINE;
+ notify_fname(handle->conn, NOTIFY_ACTION_MODIFIED,
+ FILE_NOTIFY_CHANGE_ATTRIBUTES,
+ fsp->fsp_name->base_name);
+ }
+
+ return ret;
+}
+
+static ssize_t vfs_gpfs_hsm_notify_aio_return(struct vfs_handle_struct *handle,
+ struct files_struct *fsp,
+ SMB_STRUCT_AIOCB *aiocb)
+{
+ ssize_t ret;
+
+ ret = SMB_VFS_NEXT_AIO_RETURN(handle, fsp, aiocb);
+
+ DEBUG(10, ("vfs_gpfs_hsm_notify_aio_return: vfs_private = %x\n",
+ (unsigned int)fsp->fsp_name->st.vfs_private));
+
+ if ((ret != -1) &&
+ ((fsp->fsp_name->st.vfs_private & GPFS_WINATTR_OFFLINE) != 0)) {
+ fsp->fsp_name->st.vfs_private &= ~GPFS_WINATTR_OFFLINE;
+ DEBUG(10, ("sending notify\n"));
+ notify_fname(handle->conn, NOTIFY_ACTION_MODIFIED,
+ FILE_NOTIFY_CHANGE_ATTRIBUTES,
+ fsp->fsp_name->base_name);
+ }
+
+ return ret;
+}
+
+static struct vfs_fn_pointers vfs_gpfs_hsm_notify_fns = {
+ .pread = vfs_gpfs_hsm_notify_pread,
+ .pwrite = vfs_gpfs_hsm_notify_pwrite,
+ .aio_return_fn = vfs_gpfs_hsm_notify_aio_return
+};
+
+NTSTATUS vfs_gpfs_hsm_notify_init(void);
+NTSTATUS vfs_gpfs_hsm_notify_init(void)
+{
+ return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "gpfs_hsm_notify",
+ &vfs_gpfs_hsm_notify_fns);
+}