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Unix SMB/CIFS implementation.
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Copyright (C) Stefan Metzmacher 2008
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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abstract the various kernel interfaces to leases (oplocks) into a
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single Samba friendly interface
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#include "system/filesys.h"
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#include "ntvfs/sysdep/sys_lease.h"
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#include "../lib/util/dlinklist.h"
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#include "param/param.h"
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/* list of registered backends */
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static struct sys_lease_ops *backends;
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static uint32_t num_backends;
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#define LEASE_BACKEND "lease:backend"
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initialise a system change notify backend
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_PUBLIC_ struct sys_lease_context *sys_lease_context_create(struct share_config *scfg,
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struct tevent_context *ev,
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struct messaging_context *msg,
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sys_lease_send_break_fn break_send)
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struct sys_lease_context *ctx;
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if (num_backends == 0) {
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ctx = talloc_zero(mem_ctx, struct sys_lease_context);
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ctx->break_send = break_send;
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bname = share_string_option(scfg, LEASE_BACKEND, NULL);
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for (i=0;i<num_backends;i++) {
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if (strcasecmp(backends[i].name, bname) == 0) {
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ctx->ops = &backends[i];
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status = ctx->ops->init(ctx);
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if (!NT_STATUS_IS_OK(status)) {
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register a lease backend
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_PUBLIC_ NTSTATUS sys_lease_register(const struct sys_lease_ops *backend)
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struct sys_lease_ops *b;
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b = talloc_realloc(talloc_autofree_context(), backends,
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struct sys_lease_ops, num_backends+1);
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NT_STATUS_HAVE_NO_MEMORY(b);
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backends[num_backends] = *backend;
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#ifndef STATIC_sys_lease_MODULES
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#define STATIC_sys_lease_MODULES NULL
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_PUBLIC_ NTSTATUS sys_lease_init(void)
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static bool initialized = false;
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extern NTSTATUS sys_lease_linux_init(void);
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init_module_fn static_init[] = { STATIC_sys_lease_MODULES };
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if (initialized) return NT_STATUS_OK;
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run_init_functions(static_init);
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NTSTATUS sys_lease_setup(struct sys_lease_context *ctx,
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struct opendb_entry *e)
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return ctx->ops->setup(ctx, e);
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NTSTATUS sys_lease_update(struct sys_lease_context *ctx,
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struct opendb_entry *e)
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return ctx->ops->update(ctx, e);
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NTSTATUS sys_lease_remove(struct sys_lease_context *ctx,
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struct opendb_entry *e)
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return ctx->ops->remove(ctx, e);