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authorshishir <shishirng@gluster.com>2011-07-19 16:02:12 +0530
committerAnand Avati <avati@gluster.com>2011-08-10 22:51:56 -0700
commit86999525240983dcbd3fe66eb40a0947730c695c (patch)
tree47ca5e1e42634de69280525f7032848cdcf6661f /xlators/features/read-only
parent5ce1b5c357d490f68ae89bfd3ce31326a81a1183 (diff)
WORM: Write Once Read Many times xlator support
This xlator will allow files to be opened for write in append mode only. Mount with --worm(glusterfs) or -o worm (mount) option to enable worm xlator Change-Id: I1be02fcf2aee2182ea2c66b514357918136fabeb BUG: 3166 Reviewed-on: http://review.gluster.com/23 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Anand Avati <avati@gluster.com>
Diffstat (limited to 'xlators/features/read-only')
-rw-r--r--xlators/features/read-only/src/Makefile.am10
-rw-r--r--xlators/features/read-only/src/read-only-common.c246
-rw-r--r--xlators/features/read-only/src/read-only-common.h123
-rw-r--r--xlators/features/read-only/src/read-only.c221
-rw-r--r--xlators/features/read-only/src/worm.c101
5 files changed, 480 insertions, 221 deletions
diff --git a/xlators/features/read-only/src/Makefile.am b/xlators/features/read-only/src/Makefile.am
index 15f4996..588d00c 100644
--- a/xlators/features/read-only/src/Makefile.am
+++ b/xlators/features/read-only/src/Makefile.am
@@ -1,11 +1,19 @@
-xlator_LTLIBRARIES = read-only.la
+xlator_LTLIBRARIES = read-only.la worm.la
+
xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/features
+noinst_HEADERS = read-only-common.h
+
read_only_la_LDFLAGS = -module -avoidversion
read_only_la_SOURCES = read-only.c
read_only_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la
+worm_la_LDFLAGS = -module -avoidversion
+
+worm_la_SOURCES = read-only-common.c worm.c
+worm_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la
+
AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall -D$(GF_HOST_OS) \
-I$(top_srcdir)/libglusterfs/src -shared -nostartfiles $(GF_CFLAGS)
diff --git a/xlators/features/read-only/src/read-only-common.c b/xlators/features/read-only/src/read-only-common.c
new file mode 100644
index 0000000..5e4949e
--- /dev/null
+++ b/xlators/features/read-only/src/read-only-common.c
@@ -0,0 +1,246 @@
+/*
+ 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"
+
+int32_t
+ro_xattrop (call_frame_t *frame, xlator_t *this, loc_t *loc,
+ gf_xattrop_flags_t flags, dict_t *dict)
+{
+ STACK_UNWIND_STRICT (xattrop, frame, -1, EROFS, NULL);
+ return 0;
+}
+
+int32_t
+ro_fxattrop (call_frame_t *frame, xlator_t *this,
+ fd_t *fd, gf_xattrop_flags_t flags, dict_t *dict)
+{
+ STACK_UNWIND_STRICT (fxattrop, frame, -1, EROFS, NULL);
+ return 0;
+}
+
+int32_t
+ro_entrylk (call_frame_t *frame, xlator_t *this, const char *volume,
+ loc_t *loc, const char *basename, entrylk_cmd cmd,
+ entrylk_type type)
+{
+ STACK_UNWIND_STRICT (entrylk, frame, -1, EROFS);
+ return 0;
+}
+
+int32_t
+ro_fentrylk (call_frame_t *frame, xlator_t *this, const char *volume,
+ fd_t *fd, const char *basename, entrylk_cmd cmd, entrylk_type type)
+{
+ STACK_UNWIND_STRICT (fentrylk, frame, -1, EROFS);
+ return 0;
+}
+
+int32_t
+ro_inodelk (call_frame_t *frame, xlator_t *this, const char *volume,
+ loc_t *loc, int32_t cmd, struct gf_flock *lock)
+{
+ STACK_UNWIND_STRICT (inodelk, frame, -1, EROFS);
+ return 0;
+}
+
+int32_t
+ro_finodelk (call_frame_t *frame, xlator_t *this, const char *volume,
+ fd_t *fd, int32_t cmd, struct gf_flock *lock)
+{
+ STACK_UNWIND_STRICT (finodelk, frame, -1, EROFS);
+ return 0;
+}
+
+int32_t
+ro_lk (call_frame_t *frame, xlator_t *this, fd_t *fd, int cmd,
+ struct gf_flock *flock)
+{
+ STACK_UNWIND_STRICT (lk, frame, -1, EROFS, NULL);
+ return 0;
+}
+
+int32_t
+ro_setattr (call_frame_t *frame, xlator_t *this, loc_t *loc,
+ struct iatt *stbuf, int32_t valid)
+{
+ STACK_UNWIND_STRICT (setattr, frame, -1, EROFS, NULL, NULL);
+ return 0;
+}
+
+int32_t
+ro_fsetattr (call_frame_t *frame, xlator_t *this, fd_t *fd,
+ struct iatt *stbuf, int32_t valid)
+{
+ STACK_UNWIND_STRICT (fsetattr, frame, -1, EROFS, NULL, NULL);
+ return 0;
+}
+
+
+int32_t
+ro_truncate (call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset)
+{
+ STACK_UNWIND_STRICT (truncate, frame, -1, EROFS, NULL, NULL);
+ return 0;
+}
+
+int32_t
+ro_ftruncate (call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset)
+{
+ STACK_UNWIND_STRICT (ftruncate, frame, -1, EROFS, NULL, NULL);
+ return 0;
+}
+
+int
+ro_mknod (call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
+ dev_t rdev, dict_t *params)
+{
+ STACK_UNWIND_STRICT (mknod, frame, -1, EROFS, NULL, NULL, NULL, NULL);
+ return 0;
+}
+
+
+int
+ro_mkdir (call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
+ dict_t *params)
+{
+ STACK_UNWIND_STRICT (mkdir, frame, -1, EROFS, NULL, NULL, NULL, NULL);
+ return 0;
+}
+
+int32_t
+ro_unlink (call_frame_t *frame, xlator_t *this, loc_t *loc)
+{
+ STACK_UNWIND_STRICT (unlink, frame, -1, EROFS, NULL, NULL);
+ return 0;
+}
+
+
+int
+ro_rmdir (call_frame_t *frame, xlator_t *this, loc_t *loc, int flags)
+{
+ STACK_UNWIND_STRICT (rmdir, frame, -1, EROFS, NULL, NULL);
+ return 0;
+}
+
+
+int
+ro_symlink (call_frame_t *frame, xlator_t *this, const char *linkpath,
+ loc_t *loc, dict_t *params)
+{
+ STACK_UNWIND_STRICT (symlink, frame, -1, EROFS, NULL, NULL, NULL, NULL);
+ return 0;
+}
+
+
+
+int32_t
+ro_rename (call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc)
+{
+ STACK_UNWIND_STRICT (rename, frame, -1, EROFS, NULL, NULL, NULL, NULL,
+ NULL);
+ return 0;
+}
+
+
+int32_t
+ro_link (call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc)
+{
+ STACK_UNWIND_STRICT (link, frame, -1, EROFS, NULL, NULL, NULL, NULL);
+ return 0;
+}
+
+int32_t
+ro_create (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags,
+ mode_t mode, fd_t *fd, dict_t *params)
+{
+ STACK_UNWIND_STRICT (create, frame, -1, EROFS, NULL, NULL, NULL,
+ NULL, NULL);
+ return 0;
+}
+
+
+static int32_t
+ro_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
+ro_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)) {
+ STACK_UNWIND_STRICT (open, frame, -1, EROFS, NULL);
+ return 0;
+ }
+
+ STACK_WIND (frame, ro_open_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->open, loc, flags, fd, wbflags);
+ return 0;
+}
+
+int32_t
+ro_fsetxattr (call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *dict,
+ int32_t flags)
+{
+ STACK_UNWIND_STRICT (fsetxattr, frame, -1, EROFS);
+ return 0;
+}
+
+int32_t
+ro_fsyncdir (call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t flags)
+{
+ STACK_UNWIND_STRICT (fsyncdir, frame, -1, EROFS);
+ return 0;
+}
+
+int32_t
+ro_writev (call_frame_t *frame, xlator_t *this, fd_t *fd, struct iovec *vector,
+ int32_t count, off_t off, struct iobref *iobref)
+{
+ STACK_UNWIND_STRICT (writev, frame, -1, EROFS, NULL, NULL);
+ return 0;
+}
+
+
+int32_t
+ro_setxattr (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *dict,
+ int32_t flags)
+{
+ STACK_UNWIND_STRICT (setxattr, frame, -1, EROFS);
+ return 0;
+}
+
+int32_t
+ro_removexattr (call_frame_t *frame, xlator_t *this, loc_t *loc,
+ const char *name)
+{
+ STACK_UNWIND_STRICT (removexattr, frame, -1, EROFS);
+ return 0;
+}
diff --git a/xlators/features/read-only/src/read-only-common.h b/xlators/features/read-only/src/read-only-common.h
new file mode 100644
index 0000000..3bc008e
--- /dev/null
+++ b/xlators/features/read-only/src/read-only-common.h
@@ -0,0 +1,123 @@
+/*
+ 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"
+
+int32_t
+ro_xattrop (call_frame_t *frame, xlator_t *this, loc_t *loc,
+ gf_xattrop_flags_t flags, dict_t *dict);
+
+int32_t
+ro_fxattrop (call_frame_t *frame, xlator_t *this,
+ fd_t *fd, gf_xattrop_flags_t flags, dict_t *dict);
+
+int32_t
+ro_entrylk (call_frame_t *frame, xlator_t *this, const char *volume,
+ loc_t *loc, const char *basename, entrylk_cmd cmd,
+ entrylk_type type);
+
+int32_t
+ro_fentrylk (call_frame_t *frame, xlator_t *this, const char *volume,
+ fd_t *fd, const char *basename, entrylk_cmd cmd, entrylk_type
+ type);
+
+int32_t
+ro_inodelk (call_frame_t *frame, xlator_t *this, const char *volume,
+ loc_t *loc, int32_t cmd, struct gf_flock *lock);
+
+int32_t
+ro_finodelk (call_frame_t *frame, xlator_t *this, const char *volume,
+ fd_t *fd, int32_t cmd, struct gf_flock *lock);
+
+int32_t
+ro_lk (call_frame_t *frame, xlator_t *this, fd_t *fd, int cmd,
+ struct gf_flock *flock);
+
+int32_t
+ro_setattr (call_frame_t *frame, xlator_t *this, loc_t *loc,
+ struct iatt *stbuf, int32_t valid);
+
+int32_t
+ro_fsetattr (call_frame_t *frame, xlator_t *this, fd_t *fd,
+ struct iatt *stbuf, int32_t valid);
+
+
+int32_t
+ro_truncate (call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset);
+
+int32_t
+ro_ftruncate (call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset);
+
+int
+ro_mknod (call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
+ dev_t rdev, dict_t *params);
+
+int
+ro_mkdir (call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
+ dict_t *params);
+
+int32_t
+ro_unlink (call_frame_t *frame, xlator_t *this, loc_t *loc);
+
+int
+ro_rmdir (call_frame_t *frame, xlator_t *this, loc_t *loc, int flags);
+
+
+int
+ro_symlink (call_frame_t *frame, xlator_t *this, const char *linkpath,
+ loc_t *loc, dict_t *params);
+
+int32_t
+ro_rename (call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc);
+
+int32_t
+ro_link (call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc);
+
+int32_t
+ro_create (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags,
+ mode_t mode, fd_t *fd, dict_t *params);
+
+int32_t
+ro_open (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags,
+ fd_t *fd, int32_t wbflags);
+
+int32_t
+ro_fsetxattr (call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *dict,
+ int32_t flags);
+
+int32_t
+ro_fsyncdir (call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t flags);
+
+int32_t
+ro_writev (call_frame_t *frame, xlator_t *this, fd_t *fd, struct iovec *vector,
+ int32_t count, off_t off, struct iobref *iobref);
+
+int32_t
+ro_setxattr (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *dict,
+ int32_t flags);
+
+int32_t
+ro_removexattr (call_frame_t *frame, xlator_t *this, loc_t *loc,
+ const char *name);
diff --git a/xlators/features/read-only/src/read-only.c b/xlators/features/read-only/src/read-only.c
index 54def69..b11e84f 100644
--- a/xlators/features/read-only/src/read-only.c
+++ b/xlators/features/read-only/src/read-only.c
@@ -24,226 +24,7 @@
#include "xlator.h"
#include "defaults.h"
-
-int32_t
-ro_xattrop (call_frame_t *frame, xlator_t *this, loc_t *loc,
- gf_xattrop_flags_t flags, dict_t *dict)
-{
- STACK_UNWIND_STRICT (xattrop, frame, -1, EROFS, NULL);
- return 0;
-}
-
-int32_t
-ro_fxattrop (call_frame_t *frame, xlator_t *this,
- fd_t *fd, gf_xattrop_flags_t flags, dict_t *dict)
-{
- STACK_UNWIND_STRICT (fxattrop, frame, -1, EROFS, NULL);
- return 0;
-}
-
-int32_t
-ro_entrylk (call_frame_t *frame, xlator_t *this, const char *volume,
- loc_t *loc, const char *basename, entrylk_cmd cmd,
- entrylk_type type)
-{
- STACK_UNWIND_STRICT (entrylk, frame, -1, EROFS);
- return 0;
-}
-
-int32_t
-ro_fentrylk (call_frame_t *frame, xlator_t *this, const char *volume,
- fd_t *fd, const char *basename, entrylk_cmd cmd, entrylk_type type)
-{
- STACK_UNWIND_STRICT (fentrylk, frame, -1, EROFS);
- return 0;
-}
-
-int32_t
-ro_inodelk (call_frame_t *frame, xlator_t *this, const char *volume,
- loc_t *loc, int32_t cmd, struct gf_flock *lock)
-{
- STACK_UNWIND_STRICT (inodelk, frame, -1, EROFS);
- return 0;
-}
-
-int32_t
-ro_finodelk (call_frame_t *frame, xlator_t *this, const char *volume,
- fd_t *fd, int32_t cmd, struct gf_flock *lock)
-{
- STACK_UNWIND_STRICT (finodelk, frame, -1, EROFS);
- return 0;
-}
-
-int32_t
-ro_lk (call_frame_t *frame, xlator_t *this, fd_t *fd, int cmd,
- struct gf_flock *flock)
-{
- STACK_UNWIND_STRICT (lk, frame, -1, EROFS, NULL);
- return 0;
-}
-
-int32_t
-ro_setattr (call_frame_t *frame, xlator_t *this, loc_t *loc,
- struct iatt *stbuf, int32_t valid)
-{
- STACK_UNWIND_STRICT (setattr, frame, -1, EROFS, NULL, NULL);
- return 0;
-}
-
-int32_t
-ro_fsetattr (call_frame_t *frame, xlator_t *this, fd_t *fd,
- struct iatt *stbuf, int32_t valid)
-{
- STACK_UNWIND_STRICT (fsetattr, frame, -1, EROFS, NULL, NULL);
- return 0;
-}
-
-
-int32_t
-ro_truncate (call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset)
-{
- STACK_UNWIND_STRICT (truncate, frame, -1, EROFS, NULL, NULL);
- return 0;
-}
-
-int32_t
-ro_ftruncate (call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset)
-{
- STACK_UNWIND_STRICT (ftruncate, frame, -1, EROFS, NULL, NULL);
- return 0;
-}
-
-int
-ro_mknod (call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
- dev_t rdev, dict_t *params)
-{
- STACK_UNWIND_STRICT (mknod, frame, -1, EROFS, NULL, NULL, NULL, NULL);
- return 0;
-}
-
-
-int
-ro_mkdir (call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
- dict_t *params)
-{
- STACK_UNWIND_STRICT (mkdir, frame, -1, EROFS, NULL, NULL, NULL, NULL);
- return 0;
-}
-
-int32_t
-ro_unlink (call_frame_t *frame, xlator_t *this, loc_t *loc)
-{
- STACK_UNWIND_STRICT (unlink, frame, -1, EROFS, NULL, NULL);
- return 0;
-}
-
-
-int
-ro_rmdir (call_frame_t *frame, xlator_t *this, loc_t *loc, int flags)
-{
- STACK_UNWIND_STRICT (rmdir, frame, -1, EROFS, NULL, NULL);
- return 0;
-}
-
-
-int
-ro_symlink (call_frame_t *frame, xlator_t *this, const char *linkpath,
- loc_t *loc, dict_t *params)
-{
- STACK_UNWIND_STRICT (symlink, frame, -1, EROFS, NULL, NULL, NULL, NULL);
- return 0;
-}
-
-
-
-int32_t
-ro_rename (call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc)
-{
- STACK_UNWIND_STRICT (rename, frame, -1, EROFS, NULL, NULL, NULL, NULL,
- NULL);
- return 0;
-}
-
-
-int32_t
-ro_link (call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc)
-{
- STACK_UNWIND_STRICT (link, frame, -1, EROFS, NULL, NULL, NULL, NULL);
- return 0;
-}
-
-int32_t
-ro_create (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags,
- mode_t mode, fd_t *fd, dict_t *params)
-{
- STACK_UNWIND_STRICT (create, frame, -1, EROFS, NULL, NULL, NULL,
- NULL, NULL);
- return 0;
-}
-
-
-static int32_t
-ro_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
-ro_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)) {
- STACK_UNWIND_STRICT (open, frame, -1, EROFS, NULL);
- return 0;
- }
-
- STACK_WIND (frame, ro_open_cbk, FIRST_CHILD(this),
- FIRST_CHILD(this)->fops->open, loc, flags, fd, wbflags);
- return 0;
-}
-
-int32_t
-ro_fsetxattr (call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *dict,
- int32_t flags)
-{
- STACK_UNWIND_STRICT (fsetxattr, frame, -1, EROFS);
- return 0;
-}
-
-int32_t
-ro_fsyncdir (call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t flags)
-{
- STACK_UNWIND_STRICT (fsyncdir, frame, -1, EROFS);
- return 0;
-}
-
-int32_t
-ro_writev (call_frame_t *frame, xlator_t *this, fd_t *fd, struct iovec *vector,
- int32_t count, off_t off, struct iobref *iobref)
-{
- STACK_UNWIND_STRICT (writev, frame, -1, EROFS, NULL, NULL);
- return 0;
-}
-
-
-int32_t
-ro_setxattr (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *dict,
- int32_t flags)
-{
- STACK_UNWIND_STRICT (setxattr, frame, -1, EROFS);
- return 0;
-}
-
-int32_t
-ro_removexattr (call_frame_t *frame, xlator_t *this, loc_t *loc,
- const char *name)
-{
- STACK_UNWIND_STRICT (removexattr, frame, -1, EROFS);
- return 0;
-}
+#include "read-only-common.h"
int32_t
init (xlator_t *this)
diff --git a/xlators/features/read-only/src/worm.c b/xlators/features/read-only/src/worm.c
new file mode 100644
index 0000000..790bc32
--- /dev/null
+++ b/xlators/features/read-only/src/worm.c
@@ -0,0 +1,101 @@
+/*
+ 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} },
+};
+