summaryrefslogtreecommitdiffstats
path: root/xlators/features/read-only/src/worm.c
blob: 790bc3234dda9572cc4b4445858d748c68284f71 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
/*
  Copyright (c) 2008-2011 Gluster, Inc. <http://www.gluster.com>
  This file is part of GlusterFS.

  GlusterFS 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.

  GlusterFS 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/>.
*/

#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif

#include "xlator.h"
#include "defaults.h"
#include "read-only-common.h"

static int32_t
worm_open_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret,
             int32_t op_errno, fd_t *fd)
{
        STACK_UNWIND_STRICT (open, frame, op_ret, op_errno, fd);
        return 0;
}

int32_t
worm_open (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags,
         fd_t *fd, int32_t wbflags)
{
        if ((((flags & O_ACCMODE) == O_WRONLY) ||
              ((flags & O_ACCMODE) == O_RDWR)) &&
              !(flags & O_APPEND)) {
                STACK_UNWIND_STRICT (open, frame, -1, EROFS, NULL);
                return 0;
        }

        STACK_WIND (frame, worm_open_cbk, FIRST_CHILD(this),
                    FIRST_CHILD(this)->fops->open, loc, flags, fd, wbflags);
        return 0;
}

int32_t
init (xlator_t *this)
{
        if (!this->children || this->children->next) {
                gf_log (this->name, GF_LOG_ERROR,
                        "translator not configured with exactly one child");
                return -1;
        }

        if (!this->parents) {
                gf_log (this->name, GF_LOG_WARNING,
                        "dangling volume. check volfile ");
        }

        return 0;
}


void
fini (xlator_t *this)
{
        return;
}

struct xlator_fops fops = {
        
        .open        = worm_open,

        .unlink      = ro_unlink,
        .rmdir       = ro_rmdir,
        .rename      = ro_rename,
        .truncate    = ro_truncate,
        .removexattr = ro_removexattr,
        .fsyncdir    = ro_fsyncdir,
        .xattrop     = ro_xattrop,
        .inodelk     = ro_inodelk,
        .finodelk    = ro_finodelk,
        .entrylk     = ro_entrylk,
        .fentrylk    = ro_fentrylk,
        .lk          = ro_lk,
};

struct xlator_cbks cbks = {
};

struct volume_options options[] = {
        { .key = {NULL} },
};