*/
/*
* This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
*/
#define DEBUG_SUBSYSTEM S_LLITE
+#define D_MOUNT (D_SUPER | D_CONFIG/*|D_WARNING */)
+
#include <linux/module.h>
#include <linux/types.h>
#include <linux/version.h>
static int ll_drop_inode(struct inode *inode)
{
- int drop = generic_drop_inode(inode);
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ int drop;
+
+ if (!sbi->ll_inode_cache_enabled)
+ return 1;
+ drop = generic_drop_inode(inode);
if (!drop)
drop = llcrypt_drop_inode(inode);
.show_options = ll_show_options,
};
+/**
+ * This is the entry point for the mount call into Lustre.
+ * This is called when a client is mounted, and this is
+ * where we start setting things up.
+ *
+ * @lmd2data data Mount options (e.g. -o flock,abort_recov)
+ */
+static int lustre_fill_super(struct super_block *sb, void *lmd2_data,
+ int silent)
+{
+ struct lustre_mount_data *lmd;
+ struct lustre_sb_info *lsi;
+ int rc;
+
+ ENTRY;
+
+ CDEBUG(D_MOUNT|D_VFSTRACE, "VFS Op: sb %p\n", sb);
+
+ lsi = lustre_init_lsi(sb);
+ if (!lsi)
+ RETURN(-ENOMEM);
+ lmd = lsi->lsi_lmd;
+
+ /*
+ * Disable lockdep during mount, because mount locking patterns are
+ * 'special'.
+ */
+ lockdep_off();
+
+ /*
+ * LU-639: the OBD cleanup of last mount may not finish yet, wait here.
+ */
+ obd_zombie_barrier();
+
+ /* Figure out the lmd from the mount options */
+ if (lmd_parse(lmd2_data, lmd)) {
+ lustre_put_lsi(sb);
+ GOTO(out, rc = -EINVAL);
+ }
+
+ if (!lmd_is_client(lmd)) {
+#ifdef HAVE_SERVER_SUPPORT
+#if LUSTRE_VERSION_CODE > OBD_OCD_VERSION(2, 15, 51, 0)
+ static bool printed;
+
+ if (!printed) {
+ LCONSOLE_WARN("%s: mounting server target with '-t lustre' deprecated, use '-t lustre_tgt'\n",
+ lmd->lmd_profile);
+ printed = true;
+ }
+#endif
+ rc = server_fill_super(sb);
+#else
+ rc = -ENODEV;
+ CERROR("%s: This is client-side-only module, cannot handle server mount: rc = %d\n",
+ lmd->lmd_profile, rc);
+ lustre_put_lsi(sb);
+#endif
+ GOTO(out, rc);
+ }
+
+ CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile);
+ /* filename encryption is disabled by default */
+ lsi->lsi_flags &= ~LSI_FILENAME_ENC;
+ rc = lustre_start_mgc(sb);
+ if (rc) {
+ lustre_common_put_super(sb);
+ GOTO(out, rc);
+ }
+ /* Connect and start */
+ rc = ll_fill_super(sb);
+ /* ll_file_super will call lustre_common_put_super on failure,
+ * which takes care of the module reference.
+ *
+ * If error happens in fill_super() call, @lsi will be killed there.
+ * This is why we do not put it here.
+ */
+out:
+ if (rc) {
+ CERROR("llite: Unable to mount %s: rc = %d\n",
+ s2lsi(sb) ? lmd->lmd_dev : "<unknown>", rc);
+ } else {
+ CDEBUG(D_SUPER, "%s: Mount complete\n",
+ lmd->lmd_dev);
+ }
+ lockdep_on();
+ return rc;
+}
+
+/***************** FS registration ******************/
+static struct dentry *lustre_mount(struct file_system_type *fs_type, int flags,
+ const char *devname, void *data)
+{
+ return mount_nodev(fs_type, flags, data, lustre_fill_super);
+}
+
+static void lustre_kill_super(struct super_block *sb)
+{
+ struct lustre_sb_info *lsi = s2lsi(sb);
+
+ if (lsi && !IS_SERVER(lsi))
+ ll_kill_super(sb);
+
+ kill_anon_super(sb);
+}
+
+/** Register the "lustre" fs type
+ */
+static struct file_system_type lustre_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "lustre",
+ .mount = lustre_mount,
+ .kill_sb = lustre_kill_super,
+ .fs_flags = FS_RENAME_DOES_D_MOVE,
+};
+MODULE_ALIAS_FS("lustre");
+
static int __init lustre_init(void)
{
- struct lnet_process_id lnet_id;
- int i, rc;
+ int rc;
unsigned long lustre_inode_cache_flags;
BUILD_BUG_ON(sizeof(LUSTRE_VOLATILE_HDR) !=
if (rc)
GOTO(out_cache, rc);
- /* Nodes with small feet have little entropy. The NID for this
- * node gives the most entropy in the low bits. */
- for (i = 0;; i++) {
- if (LNetGetId(i, &lnet_id) == -ENOENT)
- break;
-
- add_device_randomness(&lnet_id.nid, sizeof(lnet_id.nid));
- }
-
rc = vvp_global_init();
if (rc != 0)
GOTO(out_tunables, rc);
if (rc != 0)
GOTO(out_inode_fini_env, rc);
- lustre_register_super_ops(THIS_MODULE, ll_fill_super, ll_kill_super);
+ rc = register_filesystem(&lustre_fs_type);
+ if (rc)
+ GOTO(out_xattr, rc);
RETURN(0);
+out_xattr:
+ ll_xattr_fini();
out_inode_fini_env:
cl_env_put(cl_inode_fini_env, &cl_inode_fini_refcheck);
out_vvp:
static void __exit lustre_exit(void)
{
- lustre_register_super_ops(NULL, NULL, NULL);
+ unregister_filesystem(&lustre_fs_type);
llite_tunables_unregister();
git://git.whamcloud.com / fs / lustre-release.git / blobdiff