1 files changed, 296 insertions, 136 deletions

diff --git a/xlators/features/read-only/src/read-only-common.c b/xlators/features/read-only/src/read-only-common.c
index 5e4949ee0c2..9640e7e3eee 100644
--- a/xlators/features/read-only/src/read-only-common.c
+++ b/xlators/features/read-only/src/read-only-common.c
@@ -1,246 +1,406 @@
 /*
-  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/>.
+   Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
+   This file is part of GlusterFS.
+
+   This file is licensed to you under your choice of the GNU Lesser
+   General Public License, version 3 or any later version (LGPLv3 or
+   later), or the GNU General Public License, version 2 (GPLv2), in all
+   cases as published by the Free Software Foundation.
 */
+#include "read-only.h"
+#include "read-only-mem-types.h"
+#include <glusterfs/defaults.h>
+
+gf_boolean_t
+is_readonly_or_worm_enabled(call_frame_t *frame, xlator_t *this)
+{
+    read_only_priv_t *priv = NULL;
+    gf_boolean_t readonly_or_worm_enabled = _gf_false;
+
+    priv = this->private;
+    GF_ASSERT(priv);
 
-#ifndef _CONFIG_H
-#define _CONFIG_H
-#include "config.h"
-#endif
+    readonly_or_worm_enabled = priv->readonly_or_worm_enabled;
+
+    if (frame->root->pid < GF_CLIENT_PID_MAX)
+        readonly_or_worm_enabled = _gf_false;
+
+    return readonly_or_worm_enabled;
+}
 
-#include "xlator.h"
-#include "defaults.h"
+static int
+_check_key_is_zero_filled(dict_t *d, char *k, data_t *v, void *tmp)
+{
+    if (mem_0filled((const char *)v->data, v->len)) {
+        /* -1 means, no more iterations, treat as 'break' */
+        return -1;
+    }
+    return 0;
+}
 
 int32_t
-ro_xattrop (call_frame_t *frame, xlator_t *this, loc_t *loc,
-            gf_xattrop_flags_t flags, dict_t *dict)
+ro_xattrop(call_frame_t *frame, xlator_t *this, loc_t *loc,
+           gf_xattrop_flags_t flags, dict_t *dict, dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (xattrop, frame, -1, EROFS, NULL);
-        return 0;
+    gf_boolean_t allzero = _gf_false;
+    int ret = 0;
+
+    ret = dict_foreach(dict, _check_key_is_zero_filled, NULL);
+    if (ret == 0)
+        allzero = _gf_true;
+
+    if (is_readonly_or_worm_enabled(frame, this) && !allzero)
+        STACK_UNWIND_STRICT(xattrop, frame, -1, EROFS, NULL, xdata);
+    else
+        STACK_WIND_TAIL(frame, FIRST_CHILD(this),
+                        FIRST_CHILD(this)->fops->xattrop, loc, flags, dict,
+                        xdata);
+    return 0;
 }
 
 int32_t
-ro_fxattrop (call_frame_t *frame, xlator_t *this,
-             fd_t *fd, gf_xattrop_flags_t flags, dict_t *dict)
+ro_fxattrop(call_frame_t *frame, xlator_t *this, fd_t *fd,
+            gf_xattrop_flags_t flags, dict_t *dict, dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (fxattrop, frame, -1, EROFS, NULL);
-        return 0;
+    gf_boolean_t allzero = _gf_false;
+    int ret = 0;
+
+    ret = dict_foreach(dict, _check_key_is_zero_filled, NULL);
+    if (ret == 0)
+        allzero = _gf_true;
+
+    if (is_readonly_or_worm_enabled(frame, this) && !allzero)
+        STACK_UNWIND_STRICT(fxattrop, frame, -1, EROFS, NULL, xdata);
+    else
+        STACK_WIND_TAIL(frame, FIRST_CHILD(this),
+                        FIRST_CHILD(this)->fops->fxattrop, fd, flags, dict,
+                        xdata);
+
+    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)
+ro_entrylk(call_frame_t *frame, xlator_t *this, const char *volume, loc_t *loc,
+           const char *basename, entrylk_cmd cmd, entrylk_type type,
+           dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (entrylk, frame, -1, EROFS);
-        return 0;
+    STACK_WIND_TAIL(frame, FIRST_CHILD(this), FIRST_CHILD(this)->fops->entrylk,
+                    volume, loc, basename, cmd, type, xdata);
+
+    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)
+ro_fentrylk(call_frame_t *frame, xlator_t *this, const char *volume, fd_t *fd,
+            const char *basename, entrylk_cmd cmd, entrylk_type type,
+            dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (fentrylk, frame, -1, EROFS);
-        return 0;
+    STACK_WIND_TAIL(frame, FIRST_CHILD(this), FIRST_CHILD(this)->fops->fentrylk,
+                    volume, fd, basename, cmd, type, xdata);
+
+    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)
+ro_inodelk(call_frame_t *frame, xlator_t *this, const char *volume, loc_t *loc,
+           int32_t cmd, struct gf_flock *lock, dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (inodelk, frame, -1, EROFS);
-        return 0;
+    STACK_WIND_TAIL(frame, FIRST_CHILD(this), FIRST_CHILD(this)->fops->inodelk,
+                    volume, loc, cmd, lock, xdata);
+
+    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)
+ro_finodelk(call_frame_t *frame, xlator_t *this, const char *volume, fd_t *fd,
+            int32_t cmd, struct gf_flock *lock, dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (finodelk, frame, -1, EROFS);
-        return 0;
+    STACK_WIND_TAIL(frame, FIRST_CHILD(this), FIRST_CHILD(this)->fops->finodelk,
+                    volume, fd, cmd, lock, xdata);
+
+    return 0;
 }
 
 int32_t
-ro_lk (call_frame_t *frame, xlator_t *this, fd_t *fd, int cmd,
-       struct gf_flock *flock)
+ro_lk(call_frame_t *frame, xlator_t *this, fd_t *fd, int cmd,
+      struct gf_flock *flock, dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (lk, frame, -1, EROFS, NULL);
-        return 0;
+    STACK_WIND_TAIL(frame, FIRST_CHILD(this), FIRST_CHILD(this)->fops->lk, fd,
+                    cmd, flock, xdata);
+
+    return 0;
 }
 
 int32_t
-ro_setattr (call_frame_t *frame, xlator_t *this, loc_t *loc,
-            struct iatt *stbuf, int32_t valid)
+ro_setattr(call_frame_t *frame, xlator_t *this, loc_t *loc, struct iatt *stbuf,
+           int32_t valid, dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (setattr, frame, -1, EROFS, NULL, NULL);
-	return 0;
+    if (is_readonly_or_worm_enabled(frame, this))
+        STACK_UNWIND_STRICT(setattr, frame, -1, EROFS, NULL, NULL, xdata);
+    else
+        STACK_WIND_TAIL(frame, FIRST_CHILD(this),
+                        FIRST_CHILD(this)->fops->setattr, loc, stbuf, valid,
+                        xdata);
+
+    return 0;
 }
 
 int32_t
-ro_fsetattr (call_frame_t *frame, xlator_t *this, fd_t *fd,
-             struct iatt *stbuf, int32_t valid)
+ro_fsetattr(call_frame_t *frame, xlator_t *this, fd_t *fd, struct iatt *stbuf,
+            int32_t valid, dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (fsetattr, frame, -1, EROFS, NULL, NULL);
-        return 0;
+    if (is_readonly_or_worm_enabled(frame, this))
+        STACK_UNWIND_STRICT(fsetattr, frame, -1, EROFS, NULL, NULL, xdata);
+    else
+        STACK_WIND_TAIL(frame, FIRST_CHILD(this),
+                        FIRST_CHILD(this)->fops->fsetattr, fd, stbuf, valid,
+                        xdata);
+
+    return 0;
 }
 
+int32_t
+ro_truncate(call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset,
+            dict_t *xdata)
+{
+    if (is_readonly_or_worm_enabled(frame, this))
+        STACK_UNWIND_STRICT(truncate, frame, -1, EROFS, NULL, NULL, xdata);
+    else
+        STACK_WIND_TAIL(frame, FIRST_CHILD(this),
+                        FIRST_CHILD(this)->fops->truncate, loc, offset, xdata);
+
+    return 0;
+}
 
 int32_t
-ro_truncate (call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset)
+ro_ftruncate(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset,
+             dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (truncate, frame, -1, EROFS, NULL, NULL);
-	return 0;
+    if (is_readonly_or_worm_enabled(frame, this))
+        STACK_UNWIND_STRICT(ftruncate, frame, -1, EROFS, NULL, NULL, xdata);
+    else
+        STACK_WIND_TAIL(frame, FIRST_CHILD(this),
+                        FIRST_CHILD(this)->fops->ftruncate, fd, offset, xdata);
+
+    return 0;
 }
 
 int32_t
-ro_ftruncate (call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset)
+ro_fallocate(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t mode,
+             off_t offset, size_t len, dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (ftruncate, frame, -1, EROFS, NULL, NULL);
-	return 0;
+    if (is_readonly_or_worm_enabled(frame, this))
+        STACK_UNWIND_STRICT(fallocate, frame, -1, EROFS, NULL, NULL, xdata);
+    else
+        STACK_WIND_TAIL(frame, FIRST_CHILD(this),
+                        FIRST_CHILD(this)->fops->fallocate, fd, mode, offset,
+                        len, xdata);
+    return 0;
 }
 
 int
-ro_mknod (call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
-          dev_t rdev, dict_t *params)
+ro_mknod(call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
+         dev_t rdev, mode_t umask, dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (mknod, frame, -1, EROFS, NULL, NULL, NULL, NULL);
-        return 0;
+    if (is_readonly_or_worm_enabled(frame, this))
+        STACK_UNWIND_STRICT(mknod, frame, -1, EROFS, NULL, NULL, NULL, NULL,
+                            xdata);
+    else
+        STACK_WIND_TAIL(frame, FIRST_CHILD(this),
+                        FIRST_CHILD(this)->fops->mknod, loc, mode, rdev, umask,
+                        xdata);
+
+    return 0;
 }
 
-
 int
-ro_mkdir (call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
-          dict_t *params)
+ro_mkdir(call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
+         mode_t umask, dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (mkdir, frame, -1, EROFS, NULL, NULL, NULL, NULL);
-        return 0;
+    if (is_readonly_or_worm_enabled(frame, this))
+        STACK_UNWIND_STRICT(mkdir, frame, -1, EROFS, NULL, NULL, NULL, NULL,
+                            xdata);
+    else
+        STACK_WIND_TAIL(frame, FIRST_CHILD(this),
+                        FIRST_CHILD(this)->fops->mkdir, loc, mode, umask,
+                        xdata);
+
+    return 0;
 }
 
 int32_t
-ro_unlink (call_frame_t *frame, xlator_t *this, loc_t *loc)
+ro_unlink(call_frame_t *frame, xlator_t *this, loc_t *loc, int xflag,
+          dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (unlink, frame, -1, EROFS, NULL, NULL);
-        return 0;
-}
+    if (is_readonly_or_worm_enabled(frame, this))
+        STACK_UNWIND_STRICT(unlink, frame, -1, EROFS, NULL, NULL, xdata);
+    else
+        STACK_WIND_TAIL(frame, FIRST_CHILD(this),
+                        FIRST_CHILD(this)->fops->unlink, loc, xflag, xdata);
 
+    return 0;
+}
 
 int
-ro_rmdir (call_frame_t *frame, xlator_t *this, loc_t *loc, int flags)
+ro_rmdir(call_frame_t *frame, xlator_t *this, loc_t *loc, int flags,
+         dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (rmdir, frame, -1, EROFS, NULL, NULL);
-        return 0;
-}
+    if (is_readonly_or_worm_enabled(frame, this))
+        STACK_UNWIND_STRICT(rmdir, frame, -1, EROFS, NULL, NULL, xdata);
+    else
+        STACK_WIND_TAIL(frame, FIRST_CHILD(this),
+                        FIRST_CHILD(this)->fops->rmdir, loc, flags, xdata);
 
+    return 0;
+}
 
 int
-ro_symlink (call_frame_t *frame, xlator_t *this, const char *linkpath,
-            loc_t *loc, dict_t *params)
+ro_symlink(call_frame_t *frame, xlator_t *this, const char *linkpath,
+           loc_t *loc, mode_t umask, dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (symlink, frame, -1, EROFS, NULL, NULL, NULL, NULL);
-        return 0;
+    if (is_readonly_or_worm_enabled(frame, this))
+        STACK_UNWIND_STRICT(symlink, frame, -1, EROFS, NULL, NULL, NULL, NULL,
+                            xdata);
+    else
+        STACK_WIND_TAIL(frame, FIRST_CHILD(this),
+                        FIRST_CHILD(this)->fops->symlink, linkpath, loc, umask,
+                        xdata);
+
+    return 0;
 }
 
-
-
 int32_t
-ro_rename (call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc)
+ro_rename(call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc,
+          dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (rename, frame, -1, EROFS, NULL, NULL, NULL, NULL,
-                             NULL);
-        return 0;
+    if (is_readonly_or_worm_enabled(frame, this))
+        STACK_UNWIND_STRICT(rename, frame, -1, EROFS, NULL, NULL, NULL, NULL,
+                            NULL, xdata);
+    else
+        STACK_WIND_TAIL(frame, FIRST_CHILD(this),
+                        FIRST_CHILD(this)->fops->rename, oldloc, newloc, xdata);
+
+    return 0;
 }
 
-
 int32_t
-ro_link (call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc)
+ro_link(call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc,
+        dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (link, frame, -1, EROFS, NULL, NULL, NULL, NULL);
-        return 0;
+    if (is_readonly_or_worm_enabled(frame, this))
+        STACK_UNWIND_STRICT(link, frame, -1, EROFS, NULL, NULL, NULL, NULL,
+                            xdata);
+    else
+        STACK_WIND_TAIL(frame, FIRST_CHILD(this), FIRST_CHILD(this)->fops->link,
+                        oldloc, newloc, xdata);
+
+    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)
+ro_create(call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags,
+          mode_t mode, mode_t umask, fd_t *fd, dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (create, frame, -1, EROFS, NULL, NULL, NULL,
-                             NULL, NULL);
-        return 0;
+    if (is_readonly_or_worm_enabled(frame, this))
+        STACK_UNWIND_STRICT(create, frame, -1, EROFS, NULL, NULL, NULL, NULL,
+                            NULL, xdata);
+    else
+        STACK_WIND_TAIL(frame, FIRST_CHILD(this),
+                        FIRST_CHILD(this)->fops->create, loc, flags, mode,
+                        umask, fd, xdata);
+
+    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)
+ro_open_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret,
+            int32_t op_errno, fd_t *fd, dict_t *xdata)
 {
-	STACK_UNWIND_STRICT (open, frame, op_ret, op_errno, fd);
-	return 0;
+    STACK_UNWIND_STRICT(open, frame, op_ret, op_errno, fd, xdata);
+    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)
+ro_open(call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags,
+        fd_t *fd, dict_t *xdata)
 {
-        if (((flags & O_ACCMODE) == O_WRONLY) ||
-              ((flags & O_ACCMODE) == O_RDWR)) {
-                STACK_UNWIND_STRICT (open, frame, -1, EROFS, NULL);
-                return 0;
-	}
+    if (is_readonly_or_worm_enabled(frame, this) &&
+        (((flags & O_ACCMODE) == O_WRONLY) ||
+         ((flags & O_ACCMODE) == O_RDWR))) {
+        STACK_UNWIND_STRICT(open, frame, -1, EROFS, NULL, xdata);
+        return 0;
+    }
 
-	STACK_WIND (frame, ro_open_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->open, loc, flags, fd, wbflags);
-	return 0;
+    STACK_WIND(frame, ro_open_cbk, FIRST_CHILD(this),
+               FIRST_CHILD(this)->fops->open, loc, flags, fd, xdata);
+    return 0;
 }
 
 int32_t
-ro_fsetxattr (call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *dict,
-              int32_t flags)
+ro_fsetxattr(call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *dict,
+             int32_t flags, dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (fsetxattr, frame, -1, EROFS);
-	return 0;
+    if (is_readonly_or_worm_enabled(frame, this))
+        STACK_UNWIND_STRICT(fsetxattr, frame, -1, EROFS, xdata);
+    else
+        STACK_WIND_TAIL(frame, FIRST_CHILD(this),
+                        FIRST_CHILD(this)->fops->fsetxattr, fd, dict, flags,
+                        xdata);
+
+    return 0;
 }
 
 int32_t
-ro_fsyncdir (call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t flags)
+ro_fsyncdir(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t flags,
+            dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (fsyncdir, frame, -1, EROFS);
-	return 0;
+    if (is_readonly_or_worm_enabled(frame, this))
+        STACK_UNWIND_STRICT(fsyncdir, frame, -1, EROFS, xdata);
+    else
+        STACK_WIND_TAIL(frame, FIRST_CHILD(this),
+                        FIRST_CHILD(this)->fops->fsyncdir, fd, flags, xdata);
+
+    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)
+ro_writev(call_frame_t *frame, xlator_t *this, fd_t *fd, struct iovec *vector,
+          int32_t count, off_t off, uint32_t flags, struct iobref *iobref,
+          dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (writev, frame, -1, EROFS, NULL, NULL);
-        return 0;
+    if (is_readonly_or_worm_enabled(frame, this))
+        STACK_UNWIND_STRICT(writev, frame, -1, EROFS, NULL, NULL, xdata);
+    else
+        STACK_WIND_TAIL(frame, FIRST_CHILD(this),
+                        FIRST_CHILD(this)->fops->writev, fd, vector, count, off,
+                        flags, iobref, xdata);
+
+    return 0;
 }
 
-
 int32_t
-ro_setxattr (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *dict,
-             int32_t flags)
+ro_setxattr(call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *dict,
+            int32_t flags, dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (setxattr, frame, -1, EROFS);
-        return 0;
+    if (is_readonly_or_worm_enabled(frame, this))
+        STACK_UNWIND_STRICT(setxattr, frame, -1, EROFS, xdata);
+    else
+        STACK_WIND_TAIL(frame, FIRST_CHILD(this),
+                        FIRST_CHILD(this)->fops->setxattr, loc, dict, flags,
+                        xdata);
+
+    return 0;
 }
 
 int32_t
-ro_removexattr (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                const char *name)
+ro_removexattr(call_frame_t *frame, xlator_t *this, loc_t *loc,
+               const char *name, dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (removexattr, frame, -1, EROFS);
-        return 0;
+    if (is_readonly_or_worm_enabled(frame, this))
+        STACK_UNWIND_STRICT(removexattr, frame, -1, EROFS, xdata);
+    else
+        STACK_WIND_TAIL(frame, FIRST_CHILD(this),
+                        FIRST_CHILD(this)->fops->removexattr, loc, name, xdata);
+
+    return 0;
 }