source3/modules/vfs_gpfs_hsm_notify.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Make sure offline->online changes are propagated by notifies
   4
   5    This module must come before aio_fork in the chain, because
   6    aio_fork (correcly!) does not propagate the aio calls further
   7
   8    Copyright (C) Volker Lendecke 2011
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "smbd/smbd.h"
  26 #include "librpc/gen_ndr/ndr_xattr.h"
  27 #include "include/smbprofile.h"
  28
  29 #undef DBGC_CLASS
  30 #define DBGC_CLASS DBGC_VFS
  31
  32 #include <gpfs_gpl.h>
  33 #include "nfs4_acls.h"
  34 #include "vfs_gpfs.h"
  35
  36 static ssize_t vfs_gpfs_hsm_notify_pread(vfs_handle_struct *handle, files_struct *fsp,
  37                               void *data, size_t n, off_t offset)
  38 {
  39         ssize_t ret;
  40
  41         ret = SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
  42
  43         DEBUG(10, ("vfs_private = %x\n",
  44                    (unsigned int)fsp->fsp_name->st.vfs_private));
  45
  46         if ((ret != -1) &&
  47             ((fsp->fsp_name->st.vfs_private & GPFS_WINATTR_OFFLINE) != 0)) {
  48                 fsp->fsp_name->st.vfs_private &= ~GPFS_WINATTR_OFFLINE;
  49                 notify_fname(handle->conn, NOTIFY_ACTION_MODIFIED,
  50                              FILE_NOTIFY_CHANGE_ATTRIBUTES,
  51                              fsp->fsp_name->base_name);
  52         }
  53
  54         return ret;
  55 }
  56
  57 static ssize_t vfs_gpfs_hsm_notify_pwrite(struct vfs_handle_struct *handle,
  58                                struct files_struct *fsp,
  59                                const void *data, size_t n, off_t offset)
  60 {
  61         ssize_t ret;
  62
  63         ret = SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
  64
  65         if ((ret != -1) &&
  66             ((fsp->fsp_name->st.vfs_private & GPFS_WINATTR_OFFLINE) != 0)) {
  67                 fsp->fsp_name->st.vfs_private &= ~GPFS_WINATTR_OFFLINE;
  68                 notify_fname(handle->conn, NOTIFY_ACTION_MODIFIED,
  69                              FILE_NOTIFY_CHANGE_ATTRIBUTES,
  70                              fsp->fsp_name->base_name);
  71         }
  72
  73         return ret;
  74 }
  75
  76 static ssize_t vfs_gpfs_hsm_notify_aio_return(struct vfs_handle_struct *handle,
  77                                    struct files_struct *fsp,
  78                                    SMB_STRUCT_AIOCB *aiocb)
  79 {
  80         ssize_t ret;
  81
  82         ret = SMB_VFS_NEXT_AIO_RETURN(handle, fsp, aiocb);
  83
  84         DEBUG(10, ("vfs_gpfs_hsm_notify_aio_return: vfs_private = %x\n",
  85                    (unsigned int)fsp->fsp_name->st.vfs_private));
  86
  87         if ((ret != -1) &&
  88             ((fsp->fsp_name->st.vfs_private & GPFS_WINATTR_OFFLINE) != 0)) {
  89                 fsp->fsp_name->st.vfs_private &= ~GPFS_WINATTR_OFFLINE;
  90                 DEBUG(10, ("sending notify\n"));
  91                 notify_fname(handle->conn, NOTIFY_ACTION_MODIFIED,
  92                              FILE_NOTIFY_CHANGE_ATTRIBUTES,
  93                              fsp->fsp_name->base_name);
  94         }
  95
  96         return ret;
  97 }
  98
  99 static struct vfs_fn_pointers vfs_gpfs_hsm_notify_fns = {
 100         .pread_fn = vfs_gpfs_hsm_notify_pread,
 101         .pwrite_fn = vfs_gpfs_hsm_notify_pwrite,
 102         .aio_return_fn = vfs_gpfs_hsm_notify_aio_return
 103 };
 104
 105 NTSTATUS vfs_gpfs_hsm_notify_init(void);
 106 NTSTATUS vfs_gpfs_hsm_notify_init(void)
 107 {
 108         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "gpfs_hsm_notify",
 109                                 &vfs_gpfs_hsm_notify_fns);
 110 }