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vfs: add snapshot create/delete hooks

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This change adds three new VFS hooks covering snapshot manipulation:
- snap_check_path
  Check whether a path supports snapshots.
- snap_create
  Request the creation of a snapshot of the provided path.
- snap_delete
  Request the deletion of a snapshot.

These VFS call-outs will be used in future by Samba's File Server Remote
VSS Protocol (FSRVP) server.

MS-FSVRP states:
  At any given time, Windows servers allow only one shadow copy set to
  be going through the creation process.
Therefore, only provide synchronous hooks for now, which can be
converted to asynchronous _send/_recv functions when the corresponding
DCE/RPC server infrastructure is in place.

Signed-off-by: David Disseldorp <ddiss@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This commit is contained in:
David Disseldorp
2012-04-10 03:16:57 +02:00
committed by Jeremy Allison
parent 13fa1b8776
commit 67ee428467
9 changed files with 303 additions and 3 deletions
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76
source3/modules/vfs_time_audit.c
View File

@ -277,9 +277,78 @@ static uint32_t smb_time_audit_fs_capabilities(struct vfs_handle_struct *handle,
return result;
}
static NTSTATUS smb_time_audit_snap_check_path(struct vfs_handle_struct *handle,
TALLOC_CTX *mem_ctx,
const char *service_path,
char **base_volume)
{
NTSTATUS status;
struct timespec ts1,ts2;
double timediff;
clock_gettime_mono(&ts1);
status = SMB_VFS_NEXT_SNAP_CHECK_PATH(handle, mem_ctx, service_path,
base_volume);
clock_gettime_mono(&ts2);
timediff = nsec_time_diff(&ts2, &ts1) * 1.0e-9;
if (timediff > audit_timeout) {
smb_time_audit_log("snap_check_path", timediff);
}
return status;
}
static NTSTATUS smb_time_audit_snap_create(struct vfs_handle_struct *handle,
TALLOC_CTX *mem_ctx,
const char *base_volume,
time_t *tstamp,
bool rw,
char **base_path,
char **snap_path)
{
NTSTATUS status;
struct timespec ts1,ts2;
double timediff;
clock_gettime_mono(&ts1);
status = SMB_VFS_NEXT_SNAP_CREATE(handle, mem_ctx, base_volume, tstamp,
rw, base_path, snap_path);
clock_gettime_mono(&ts2);
timediff = nsec_time_diff(&ts2 ,&ts1) * 1.0e-9;
if (timediff > audit_timeout) {
smb_time_audit_log("snap_create", timediff);
}
return status;
}
static NTSTATUS smb_time_audit_snap_delete(struct vfs_handle_struct *handle,
TALLOC_CTX *mem_ctx,
char *base_path,
char *snap_path)
{
NTSTATUS status;
struct timespec ts1,ts2;
double timediff;
clock_gettime_mono(&ts1);
status = SMB_VFS_NEXT_SNAP_DELETE(handle, mem_ctx, base_path,
snap_path);
clock_gettime_mono(&ts2);
timediff = nsec_time_diff(&ts2, &ts1) * 1.0e-9;
if (timediff > audit_timeout) {
smb_time_audit_log("snap_delete", timediff);
}
return status;
}
static DIR *smb_time_audit_opendir(vfs_handle_struct *handle,
const char *fname,
const char *mask, uint32 attr)
const char *fname,
const char *mask, uint32 attr)
{
DIR *result;
struct timespec ts1,ts2;
@ -2383,6 +2452,9 @@ static struct vfs_fn_pointers vfs_time_audit_fns = {
.get_shadow_copy_data_fn = smb_time_audit_get_shadow_copy_data,
.statvfs_fn = smb_time_audit_statvfs,
.fs_capabilities_fn = smb_time_audit_fs_capabilities,
.snap_check_path_fn = smb_time_audit_snap_check_path,
.snap_create_fn = smb_time_audit_snap_create,
.snap_delete_fn = smb_time_audit_snap_delete,
.opendir_fn = smb_time_audit_opendir,
.fdopendir_fn = smb_time_audit_fdopendir,
.readdir_fn = smb_time_audit_readdir,