vfs_ceph_snapshots: implement SMB_VFS_OPENAT()

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

diff --git a/source3/modules/vfs_ceph_snapshots.c b/source3/modules/vfs_ceph_snapshots.c
index 5729c06df0e1aa1fe68d01e6d3b996aa4edf3adc..d529009552543d025060958b2bef0d4686757754 100644 (file)
--- a/source3/modules/vfs_ceph_snapshots.c
+++ b/source3/modules/vfs_ceph_snapshots.c
@@ -885,6 +885,69 @@ static int ceph_snap_gmt_open(vfs_handle_struct *handle,
        return ret;
 }
 
+static int ceph_snap_gmt_openat(vfs_handle_struct *handle,
+                               const struct files_struct *dirfsp,
+                               const struct smb_filename *smb_fname_in,
+                               files_struct *fsp,
+                               int flags,
+                               mode_t mode)
+{
+       time_t timestamp = 0;
+       struct smb_filename *smb_fname = NULL;
+       char stripped[PATH_MAX + 1];
+       char conv[PATH_MAX + 1];
+       int ret;
+       int saved_errno = 0;
+
+       ret = ceph_snap_gmt_strip_snapshot(handle,
+                                          smb_fname_in,
+                                          &timestamp,
+                                          stripped,
+                                          sizeof(stripped));
+       if (ret < 0) {
+               errno = -ret;
+               return -1;
+       }
+       if (timestamp == 0) {
+               return SMB_VFS_NEXT_OPENAT(handle,
+                                          dirfsp,
+                                          smb_fname_in,
+                                          fsp,
+                                          flags,
+                                          mode);
+       }
+
+       ret = ceph_snap_gmt_convert(handle,
+                                   stripped,
+                                   timestamp,
+                                   conv,
+                                   sizeof(conv));
+       if (ret < 0) {
+               errno = -ret;
+               return -1;
+       }
+       smb_fname = cp_smb_filename(talloc_tos(), smb_fname_in);
+       if (smb_fname == NULL) {
+               return -1;
+       }
+       smb_fname->base_name = conv;
+
+       ret = SMB_VFS_NEXT_OPENAT(handle,
+                                 dirfsp,
+                                 smb_fname,
+                                 fsp,
+                                 flags,
+                                 mode);
+       if (ret == -1) {
+               saved_errno = errno;
+       }
+       TALLOC_FREE(smb_fname);
+       if (saved_errno != 0) {
+               errno = saved_errno;
+       }
+       return ret;
+}
+
 static int ceph_snap_gmt_unlinkat(vfs_handle_struct *handle,
                        struct files_struct *dirfsp,
                        const struct smb_filename *csmb_fname,
@@ -1478,6 +1541,7 @@ static struct vfs_fn_pointers ceph_snap_fns = {
        .stat_fn = ceph_snap_gmt_stat,
        .lstat_fn = ceph_snap_gmt_lstat,
        .open_fn = ceph_snap_gmt_open,
+       .openat_fn = ceph_snap_gmt_openat,
        .unlinkat_fn = ceph_snap_gmt_unlinkat,
        .chmod_fn = ceph_snap_gmt_chmod,
        .chdir_fn = ceph_snap_gmt_chdir,