/* Unix SMB/CIFS implementation. Copyright (C) Stefan Metzmacher 2008 This program 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. This program 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/>. */ /* abstract the various kernel interfaces to leases (oplocks) into a single Samba friendly interface */ #include "includes.h" #include "system/filesys.h" #include "ntvfs/sysdep/sys_lease.h" #include "../lib/util/dlinklist.h" #include "param/param.h" /* list of registered backends */ static struct sys_lease_ops *backends; static uint32_t num_backends; #define LEASE_BACKEND "lease:backend" /* initialise a system change notify backend */ _PUBLIC_ struct sys_lease_context *sys_lease_context_create(struct share_config *scfg, TALLOC_CTX *mem_ctx, struct tevent_context *ev, struct messaging_context *msg, sys_lease_send_break_fn break_send) { struct sys_lease_context *ctx; const char *bname; int i; NTSTATUS status; if (num_backends == 0) { return NULL; } if (ev == NULL) { return NULL; } ctx = talloc_zero(mem_ctx, struct sys_lease_context); if (ctx == NULL) { return NULL; } ctx->event_ctx = ev; ctx->msg_ctx = msg; ctx->break_send = break_send; bname = share_string_option(scfg, LEASE_BACKEND, NULL); if (!bname) { talloc_free(ctx); return NULL; } for (i=0;i<num_backends;i++) { if (strcasecmp(backends[i].name, bname) == 0) { ctx->ops = &backends[i]; break; } } if (!ctx->ops) { talloc_free(ctx); return NULL; } status = ctx->ops->init(ctx); if (!NT_STATUS_IS_OK(status)) { talloc_free(ctx); return NULL; } return ctx; } /* register a lease backend */ _PUBLIC_ NTSTATUS sys_lease_register(const struct sys_lease_ops *backend) { struct sys_lease_ops *b; b = talloc_realloc(talloc_autofree_context(), backends, struct sys_lease_ops, num_backends+1); NT_STATUS_HAVE_NO_MEMORY(b); backends = b; backends[num_backends] = *backend; num_backends++; return NT_STATUS_OK; } #ifndef STATIC_sys_lease_MODULES #define STATIC_sys_lease_MODULES NULL #endif _PUBLIC_ NTSTATUS sys_lease_init(void) { static bool initialized = false; extern NTSTATUS sys_lease_linux_init(void); init_module_fn static_init[] = { STATIC_sys_lease_MODULES }; if (initialized) return NT_STATUS_OK; initialized = true; run_init_functions(static_init); return NT_STATUS_OK; } NTSTATUS sys_lease_setup(struct sys_lease_context *ctx, struct opendb_entry *e) { return ctx->ops->setup(ctx, e); } NTSTATUS sys_lease_update(struct sys_lease_context *ctx, struct opendb_entry *e) { return ctx->ops->update(ctx, e); } NTSTATUS sys_lease_remove(struct sys_lease_context *ctx, struct opendb_entry *e) { return ctx->ops->remove(ctx, e); }