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LU-13525 sec: better struct sepol_downcall_data
[fs/lustre-release.git] / lustre / ptlrpc / sec_lproc.c
index 51bace7..41ef7e0 100644 (file)
@@ -1,6 +1,4 @@
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
  * GPL HEADER START
  *
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * You should have received a copy of the GNU General Public License
  * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
  *
  * GPL HEADER END
  */
 /*
- * Copyright  2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
+ *
+ * Copyright (c) 2014, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
  * Author: Eric Mei <ericm@clusterfs.com>
  */
 
-#ifndef EXPORT_SYMTAB
-#define EXPORT_SYMTAB
-#endif
 #define DEBUG_SUBSYSTEM S_SEC
 
 #include <libcfs/libcfs.h>
-#ifndef __KERNEL__
-#include <liblustre.h>
-#include <libcfs/list.h>
-#else
 #include <linux/crypto.h>
-#endif
 
 #include <obd.h>
 #include <obd_class.h>
 
 #include "ptlrpc_internal.h"
 
-#ifdef __KERNEL__
-
-struct proc_dir_entry *sptlrpc_proc_root = NULL;
-EXPORT_SYMBOL(sptlrpc_proc_root);
-
-void sec_flags2str(unsigned long flags, char *buf, int bufsize)
+static char *sec_flags2str(unsigned long flags, char *buf, int bufsize)
 {
-        buf[0] = '\0';
-
-        if (flags & PTLRPC_SEC_FL_REVERSE)
-                strncat(buf, "reverse,", bufsize);
-        if (flags & PTLRPC_SEC_FL_ROOTONLY)
-                strncat(buf, "rootonly,", bufsize);
-        if (flags & PTLRPC_SEC_FL_UDESC)
-                strncat(buf, "udesc,", bufsize);
-        if (flags & PTLRPC_SEC_FL_BULK)
-                strncat(buf, "bulk,", bufsize);
-        if (buf[0] == '\0')
-                strncat(buf, "-,", bufsize);
-
-        buf[strlen(buf) - 1] = '\0';
-
+       buf[0] = '\0';
+
+       if (flags & PTLRPC_SEC_FL_REVERSE)
+               strlcat(buf, "reverse,", bufsize);
+       if (flags & PTLRPC_SEC_FL_ROOTONLY)
+               strlcat(buf, "rootonly,", bufsize);
+       if (flags & PTLRPC_SEC_FL_UDESC)
+               strlcat(buf, "udesc,", bufsize);
+       if (flags & PTLRPC_SEC_FL_BULK)
+               strlcat(buf, "bulk,", bufsize);
+       if (buf[0] == '\0')
+               strlcat(buf, "-,", bufsize);
+
+       return buf;
 }
 
 static int sptlrpc_info_lprocfs_seq_show(struct seq_file *seq, void *v)
 {
-        struct obd_device *dev = seq->private;
-        struct client_obd *cli = &dev->u.cli;
-        struct ptlrpc_sec *sec = NULL;
-        char               flags_str[32];
+       struct obd_device *obd = seq->private;
+       struct client_obd *cli = &obd->u.cli;
+       struct ptlrpc_sec *sec = NULL;
+       char               str[32];
 
-        LASSERT(strcmp(dev->obd_type->typ_name, LUSTRE_OSC_NAME) == 0 ||
-                strcmp(dev->obd_type->typ_name, LUSTRE_MDC_NAME) == 0 ||
-                strcmp(dev->obd_type->typ_name, LUSTRE_MGC_NAME) == 0);
+       LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) == 0 ||
+               strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0 ||
+               strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME) == 0 ||
+               strcmp(obd->obd_type->typ_name, LUSTRE_LWP_NAME) == 0 ||
+               strcmp(obd->obd_type->typ_name, LUSTRE_OSP_NAME) == 0);
 
         if (cli->cl_import)
                 sec = sptlrpc_import_sec_ref(cli->cl_import);
         if (sec == NULL)
                 goto out;
 
-        sec_flags2str(sec->ps_flvr.sf_flags, flags_str, sizeof(flags_str));
-
-        seq_printf(seq, "rpc flavor:    %s\n",
-                   sptlrpc_rpcflavor2name(sec->ps_flvr.sf_rpc));
-        seq_printf(seq, "bulk flavor:   %s/%s\n",
-                   sptlrpc_get_hash_name(sec->ps_flvr.sf_bulk_hash),
-                   sptlrpc_get_ciph_name(sec->ps_flvr.sf_bulk_ciph));
-        seq_printf(seq, "flags:         %s\n", flags_str);
-        seq_printf(seq, "id:            %d\n", sec->ps_id);
-        seq_printf(seq, "refcount:      %d\n", atomic_read(&sec->ps_refcount));
-        seq_printf(seq, "nctx:          %d\n", atomic_read(&sec->ps_nctx));
-        seq_printf(seq, "gc internal    %ld\n", sec->ps_gc_interval);
-        seq_printf(seq, "gc next        %ld\n",
-                   sec->ps_gc_interval ?
-                   sec->ps_gc_next - cfs_time_current_sec() : 0);
-
-        sptlrpc_sec_put(sec);
+        sec_flags2str(sec->ps_flvr.sf_flags, str, sizeof(str));
+
+       seq_printf(seq, "rpc flavor:    %s\n",
+                  sptlrpc_flavor2name_base(sec->ps_flvr.sf_rpc));
+       seq_printf(seq, "bulk flavor:   %s\n",
+                  sptlrpc_flavor2name_bulk(&sec->ps_flvr, str, sizeof(str)));
+       seq_printf(seq, "flags:         %s\n",
+                  sec_flags2str(sec->ps_flvr.sf_flags, str, sizeof(str)));
+       seq_printf(seq, "id:            %d\n", sec->ps_id);
+       seq_printf(seq, "refcount:      %d\n",
+                  atomic_read(&sec->ps_refcount));
+       seq_printf(seq, "nctx:  %d\n", atomic_read(&sec->ps_nctx));
+       seq_printf(seq, "gc internal    %lld\n", sec->ps_gc_interval);
+       seq_printf(seq, "gc next        %lld\n",
+                  sec->ps_gc_interval ?
+                  (s64)(sec->ps_gc_next - ktime_get_real_seconds()) : 0ll);
+
+       sptlrpc_sec_put(sec);
 out:
         return 0;
 }
+
 LPROC_SEQ_FOPS_RO(sptlrpc_info_lprocfs);
 
 static int sptlrpc_ctxs_lprocfs_seq_show(struct seq_file *seq, void *v)
 {
-        struct obd_device *dev = seq->private;
-        struct client_obd *cli = &dev->u.cli;
-        struct ptlrpc_sec *sec = NULL;
+       struct obd_device *obd = seq->private;
+       struct client_obd *cli = &obd->u.cli;
+       struct ptlrpc_sec *sec = NULL;
 
-        LASSERT(strcmp(dev->obd_type->typ_name, LUSTRE_OSC_NAME) == 0 ||
-                strcmp(dev->obd_type->typ_name, LUSTRE_MDC_NAME) == 0 ||
-                strcmp(dev->obd_type->typ_name, LUSTRE_MGC_NAME) == 0);
+       LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) == 0 ||
+               strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0 ||
+               strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME) == 0 ||
+               strcmp(obd->obd_type->typ_name, LUSTRE_LWP_NAME) == 0 ||
+               strcmp(obd->obd_type->typ_name, LUSTRE_OSP_NAME) == 0);
 
         if (cli->cl_import)
                 sec = sptlrpc_import_sec_ref(cli->cl_import);
@@ -145,83 +133,250 @@ static int sptlrpc_ctxs_lprocfs_seq_show(struct seq_file *seq, void *v)
 out:
         return 0;
 }
+
 LPROC_SEQ_FOPS_RO(sptlrpc_ctxs_lprocfs);
 
-int sptlrpc_lprocfs_cliobd_attach(struct obd_device *dev)
+#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 16, 53, 0)
+static ssize_t sepol_seq_write_old(struct obd_device *obd,
+                                  const char __user *buffer,
+                                  size_t count)
 {
-        int     rc;
-
-        if (strcmp(dev->obd_type->typ_name, LUSTRE_OSC_NAME) != 0 &&
-            strcmp(dev->obd_type->typ_name, LUSTRE_MDC_NAME) != 0 &&
-            strcmp(dev->obd_type->typ_name, LUSTRE_MGC_NAME) != 0) {
-                CERROR("can't register lproc for obd type %s\n",
-                       dev->obd_type->typ_name);
-                return -EINVAL;
-        }
-
-        rc = lprocfs_obd_seq_create(dev, "srpc_info", 0444,
-                                    &sptlrpc_info_lprocfs_fops, dev);
-        if (rc) {
-                CERROR("create proc entry srpc_info for %s: %d\n",
-                       dev->obd_name, rc);
-                return rc;
-        }
-
-        rc = lprocfs_obd_seq_create(dev, "srpc_contexts", 0444,
-                                    &sptlrpc_ctxs_lprocfs_fops, dev);
-        if (rc) {
-                CERROR("create proc entry srpc_contexts for %s: %d\n",
-                       dev->obd_name, rc);
-                return rc;
-        }
+       struct client_obd *cli = &obd->u.cli;
+       struct obd_import *imp = cli->cl_import;
+       struct sepol_downcall_data_old *param;
+       int size = sizeof(*param);
+       __u16 len;
+       int rc = 0;
+
+       if (count < size) {
+               rc = -EINVAL;
+               CERROR("%s: invalid data count = %lu, size = %d: rc = %d\n",
+                      obd->obd_name, (unsigned long) count, size, rc);
+               return rc;
+       }
+
+       OBD_ALLOC(param, size);
+       if (param == NULL)
+               return -ENOMEM;
+
+       if (copy_from_user(param, buffer, size)) {
+               rc = -EFAULT;
+               CERROR("%s: bad sepol data: rc = %d\n", obd->obd_name, rc);
+               GOTO(out, rc);
+       }
+
+       if (param->sdd_magic != SEPOL_DOWNCALL_MAGIC_OLD) {
+               rc = -EINVAL;
+               CERROR("%s: sepol downcall bad params: rc = %d\n",
+                      obd->obd_name, rc);
+               GOTO(out, rc);
+       }
+
+       if (param->sdd_sepol_len == 0 ||
+           param->sdd_sepol_len >= sizeof(imp->imp_sec->ps_sepol)) {
+               rc = -EINVAL;
+               CERROR("%s: invalid sepol data returned: rc = %d\n",
+                      obd->obd_name, rc);
+               GOTO(out, rc);
+       }
+       len = param->sdd_sepol_len; /* save sdd_sepol_len */
+       OBD_FREE(param, size);
+       size = offsetof(struct sepol_downcall_data_old,
+                       sdd_sepol[len]);
+
+       if (count < size) {
+               rc = -EINVAL;
+               CERROR("%s: invalid sepol count = %lu, size = %d: rc = %d\n",
+                      obd->obd_name, (unsigned long) count, size, rc);
+               return rc;
+       }
+
+       /* alloc again with real size */
+       OBD_ALLOC(param, size);
+       if (param == NULL)
+               return -ENOMEM;
+
+       if (copy_from_user(param, buffer, size)) {
+               rc = -EFAULT;
+               CERROR("%s: cannot copy sepol data: rc = %d\n",
+                      obd->obd_name, rc);
+               GOTO(out, rc);
+       }
+
+       spin_lock(&imp->imp_sec->ps_lock);
+       snprintf(imp->imp_sec->ps_sepol, param->sdd_sepol_len + 1, "%s",
+                param->sdd_sepol);
+       imp->imp_sec->ps_sepol_mtime = ktime_set(param->sdd_sepol_mtime, 0);
+       spin_unlock(&imp->imp_sec->ps_lock);
 
-        return 0;
-}
-EXPORT_SYMBOL(sptlrpc_lprocfs_cliobd_attach);
+out:
+       if (param != NULL)
+               OBD_FREE(param, size);
 
-static struct lprocfs_vars sptlrpc_lprocfs_vars[] = {
-        { "encrypt_page_pools", sptlrpc_proc_read_enc_pool, NULL, NULL },
-        { NULL }
-};
+       return rc ? rc : count;
+}
+#endif
 
-int sptlrpc_lproc_init(void)
+static ssize_t
+lprocfs_sptlrpc_sepol_seq_write(struct file *file, const char __user *buffer,
+                               size_t count, void *data)
 {
-        int     rc;
+       struct seq_file *seq = file->private_data;
+       struct obd_device *obd = seq->private;
+       struct client_obd *cli = &obd->u.cli;
+       struct obd_import *imp = cli->cl_import;
+       struct sepol_downcall_data *param;
+       __u32 magic;
+       int size = sizeof(magic);
+       __u16 len;
+       int rc = 0;
+
+       if (count < size) {
+               rc = -EINVAL;
+               CERROR("%s: invalid buffer count = %lu, size = %d: rc = %d\n",
+                      obd->obd_name, (unsigned long) count, size, rc);
+               return rc;
+       }
+
+       if (copy_from_user(&magic, buffer, size)) {
+               rc = -EFAULT;
+               CERROR("%s: bad sepol magic: rc = %d\n", obd->obd_name, rc);
+               return rc;
+       }
+
+       if (magic != SEPOL_DOWNCALL_MAGIC) {
+#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 16, 53, 0)
+               if (magic == SEPOL_DOWNCALL_MAGIC_OLD) {
+                       return sepol_seq_write_old(obd, buffer, count);
+               }
+#endif
+               rc = -EINVAL;
+               CERROR("%s: sepol downcall bad magic '%#08x': rc = %d\n",
+                      obd->obd_name, magic, rc);
+               return rc;
+       }
+
+       size = sizeof(*param);
+       if (count < size) {
+               rc = -EINVAL;
+               CERROR("%s: invalid data count = %lu, size = %d: rc = %d\n",
+                      obd->obd_name, (unsigned long) count, size, rc);
+               return rc;
+       }
+
+       OBD_ALLOC(param, size);
+       if (param == NULL)
+               return -ENOMEM;
+
+       if (copy_from_user(param, buffer, size)) {
+               rc = -EFAULT;
+               CERROR("%s: bad sepol data: rc = %d\n", obd->obd_name, rc);
+               GOTO(out, rc);
+       }
+
+       if (param->sdd_sepol_len == 0 ||
+           param->sdd_sepol_len >= sizeof(imp->imp_sec->ps_sepol)) {
+               rc = -EINVAL;
+               CERROR("%s: invalid sepol data returned: rc = %d\n",
+                      obd->obd_name, rc);
+               GOTO(out, rc);
+       }
+       len = param->sdd_sepol_len; /* save sdd_sepol_len */
+       OBD_FREE(param, size);
+       size = offsetof(struct sepol_downcall_data,
+                       sdd_sepol[len]);
+
+       /* alloc again with real size */
+       OBD_ALLOC(param, size);
+       if (param == NULL)
+               return -ENOMEM;
+
+       if (copy_from_user(param, buffer, size)) {
+               rc = -EFAULT;
+               CERROR("%s: cannot copy sepol data: rc = %d\n",
+                      obd->obd_name, rc);
+               GOTO(out, rc);
+       }
+
+       spin_lock(&imp->imp_sec->ps_lock);
+       snprintf(imp->imp_sec->ps_sepol, param->sdd_sepol_len + 1, "%s",
+                param->sdd_sepol);
+       imp->imp_sec->ps_sepol_mtime = ktime_set(param->sdd_sepol_mtime, 0);
+       spin_unlock(&imp->imp_sec->ps_lock);
 
-        LASSERT(sptlrpc_proc_root == NULL);
+out:
+       if (param != NULL)
+               OBD_FREE(param, size);
 
-        sptlrpc_proc_root = lprocfs_register("sptlrpc", proc_lustre_root,
-                                             sptlrpc_lprocfs_vars, NULL);
-        if (IS_ERR(sptlrpc_proc_root)) {
-                rc = PTR_ERR(sptlrpc_proc_root);
-                sptlrpc_proc_root = NULL;
-                return rc;
-        }
-        return 0;
+       return rc ? rc : count;
 }
+LPROC_SEQ_FOPS_WR_ONLY(srpc, sptlrpc_sepol);
 
-void sptlrpc_lproc_fini(void)
+int sptlrpc_lprocfs_cliobd_attach(struct obd_device *obd)
 {
-        if (sptlrpc_proc_root) {
-                lprocfs_remove(&sptlrpc_proc_root);
-                sptlrpc_proc_root = NULL;
-        }
+       if (strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) != 0 &&
+           strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) != 0 &&
+           strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME) != 0 &&
+           strcmp(obd->obd_type->typ_name, LUSTRE_LWP_NAME) != 0 &&
+           strcmp(obd->obd_type->typ_name, LUSTRE_OSP_NAME) != 0) {
+               CERROR("can't register lproc for obd type %s\n",
+                      obd->obd_type->typ_name);
+               return -EINVAL;
+       }
+
+       debugfs_create_file("srpc_info", 0444, obd->obd_debugfs_entry, obd,
+                           &sptlrpc_info_lprocfs_fops);
+
+       debugfs_create_file("srpc_contexts", 0444, obd->obd_debugfs_entry, obd,
+                           &sptlrpc_ctxs_lprocfs_fops);
+
+       debugfs_create_file("srpc_sepol", 0200, obd->obd_debugfs_entry, obd,
+                           &srpc_sptlrpc_sepol_fops);
+
+       return 0;
 }
+EXPORT_SYMBOL(sptlrpc_lprocfs_cliobd_attach);
 
-#else /* !__KERNEL__ */
+LDEBUGFS_SEQ_FOPS_RO(sptlrpc_proc_enc_pool);
 
-int sptlrpc_lprocfs_cliobd_attach(struct obd_device *dev)
-{
-        return 0;
-}
+static struct lprocfs_vars sptlrpc_lprocfs_vars[] = {
+       { .name =       "encrypt_page_pools",
+         .fops =       &sptlrpc_proc_enc_pool_fops     },
+       { NULL }
+};
+
+struct dentry *sptlrpc_debugfs_dir;
+EXPORT_SYMBOL(sptlrpc_debugfs_dir);
+
+struct proc_dir_entry *sptlrpc_lprocfs_dir;
+EXPORT_SYMBOL(sptlrpc_lprocfs_dir);
 
 int sptlrpc_lproc_init(void)
 {
-        return 0;
+       int rc;
+
+       LASSERT(sptlrpc_debugfs_dir == NULL);
+
+       sptlrpc_debugfs_dir = debugfs_create_dir("sptlrpc",
+                                                debugfs_lustre_root);
+       ldebugfs_add_vars(sptlrpc_debugfs_dir, sptlrpc_lprocfs_vars, NULL);
+
+       sptlrpc_lprocfs_dir = lprocfs_register("sptlrpc", proc_lustre_root,
+                                              NULL, NULL);
+       if (IS_ERR_OR_NULL(sptlrpc_lprocfs_dir)) {
+               rc = PTR_ERR(sptlrpc_lprocfs_dir);
+               rc = sptlrpc_lprocfs_dir ? PTR_ERR(sptlrpc_lprocfs_dir)
+                       : -ENOMEM;
+               sptlrpc_lprocfs_dir = NULL;
+       }
+       return 0;
 }
 
 void sptlrpc_lproc_fini(void)
 {
-}
+       debugfs_remove_recursive(sptlrpc_debugfs_dir);
+       sptlrpc_debugfs_dir = NULL;
 
-#endif
+       if (!IS_ERR_OR_NULL(sptlrpc_lprocfs_dir))
+               lprocfs_remove(&sptlrpc_lprocfs_dir);
+}