From 5b828dd656cc9f59ac34bacec6fcab5d92850a8c Mon Sep 17 00:00:00 2001
From: fanyong <fanyong>
Date: Thu, 12 Oct 2006 16:08:22 +0000
Subject: [PATCH] Roll back for the change of server_put_mount. Use
 server_get_mount_2 instead of server_get_mount.

---
 lustre/include/lustre_disk.h |  2 ++
 lustre/mdt/mdt_handler.c     | 18 +++++++++++-------
 lustre/obdclass/obd_mount.c  | 33 ++++++++++++++++++++++++++++++---
 3 files changed, 43 insertions(+), 10 deletions(-)

diff --git a/lustre/include/lustre_disk.h b/lustre/include/lustre_disk.h
index 9e71c09..55cf2a4 100644
--- a/lustre/include/lustre_disk.h
+++ b/lustre/include/lustre_disk.h
@@ -274,7 +274,9 @@ int lustre_process_log(struct super_block *sb, char *logname,
 int lustre_end_log(struct super_block *sb, char *logname, 
                        struct config_llog_instance *cfg);
 struct lustre_mount_info *server_get_mount(const char *name);
+struct lustre_mount_info *server_get_mount_2(const char *name);
 int server_put_mount(const char *name, struct vfsmount *mnt);
+int server_put_mount_2(const char *name, struct vfsmount *mnt);
 int server_register_target(struct super_block *sb);
 struct mgs_target_info;
 int server_mti_print(char *title, struct mgs_target_info *mti);
diff --git a/lustre/mdt/mdt_handler.c b/lustre/mdt/mdt_handler.c
index 659e397..8c92795 100644
--- a/lustre/mdt/mdt_handler.c
+++ b/lustre/mdt/mdt_handler.c
@@ -3251,7 +3251,9 @@ static void fsoptions_to_mdt_flags(struct mdt_device *m, char *options)
                         m->mdt_opts.mo_acl = 1;
                         LCONSOLE_INFO("Enabling ACL\n");
 #else
+                        m->mdt_opts.mo_acl = 0;
                         CWARN("ignoring unsupported acl mount option\n");
+                        LCONSOLE_INFO("Disabling ACL\n");
 #endif
                 } else if ((len == sizeof("noacl") - 1) &&
                            (memcmp(options, "noacl", len) == 0)) {
@@ -3292,16 +3294,18 @@ static int mdt_init0(const struct lu_env *env, struct mdt_device *m,
         m->mdt_max_mdsize = MAX_MD_SIZE;
         m->mdt_max_cookiesize = sizeof(struct llog_cookie);
 
-        lmi = server_get_mount(dev);
+        m->mdt_opts.mo_user_xattr = 0;
+        m->mdt_opts.mo_acl = 0;
+        lmi = server_get_mount_2(dev);
         if (lmi == NULL) {
-                CERROR("Cannot get mount info for %s!\n", dev);
-                RETURN(-EFAULT);
+                CERROR("Cannot get mount info for %s! "
+                       "set mdt_opts by default!\n", dev);
+        } else {
+                lsi = s2lsi(lmi->lmi_sb);
+                fsoptions_to_mdt_flags(m, lsi->lsi_lmd->lmd_opts);
+                server_put_mount_2(dev, lmi->lmi_mnt);
         }
 
-        lsi = s2lsi(lmi->lmi_sb);
-        fsoptions_to_mdt_flags(m, lsi->lsi_lmd->lmd_opts);
-        server_put_mount(dev, lmi->lmi_mnt);
-
         spin_lock_init(&m->mdt_ioepoch_lock);
         m->mdt_opts.mo_compat_resname = 0;
         m->mdt_capa_timeout = 320; // CAPA_TIMEOUT;
diff --git a/lustre/obdclass/obd_mount.c b/lustre/obdclass/obd_mount.c
index 8fd5f84..d4f8781 100644
--- a/lustre/obdclass/obd_mount.c
+++ b/lustre/obdclass/obd_mount.c
@@ -158,6 +158,25 @@ struct lustre_mount_info *server_get_mount(const char *name)
         RETURN(lmi);
 }
 
+/*
+ * Used by mdt to get mount_info from obdname.
+ * There are no blocking when using the mount_info.
+ * Do not use server_get_mount for this purpose.
+ */
+struct lustre_mount_info *server_get_mount_2(const char *name)
+{
+        struct lustre_mount_info *lmi;
+        ENTRY;
+
+        down(&lustre_mount_info_lock);
+        lmi = server_find_mount(name);
+        up(&lustre_mount_info_lock);
+        if (!lmi)
+                CERROR("Can't find mount for %s\n", name);
+
+        RETURN(lmi);
+}
+
 static void unlock_mntput(struct vfsmount *mnt)
 {
         if (kernel_locked()) {
@@ -201,14 +220,20 @@ int server_put_mount(const char *name, struct vfsmount *mnt)
                 if (atomic_read(&lmi->lmi_mnt->mnt_count) > 1)
                         CERROR("%s: mount busy, vfscount=%d!\n", name,
                                atomic_read(&lmi->lmi_mnt->mnt_count));
-
-                /* this obd should never need the mount again */
-                server_deregister_mount(name);
         }
 
+        /* this obd should never need the mount again */
+        server_deregister_mount(name);
+
         RETURN(0);
 }
 
+/* Corresponding to server_get_mount_2 */
+int server_put_mount_2(const char *name, struct vfsmount *mnt)
+{
+        ENTRY;
+        RETURN(0);
+}
 
 /******* mount helper utilities *********/
 
@@ -2112,7 +2137,9 @@ EXPORT_SYMBOL(lustre_common_put_super);
 EXPORT_SYMBOL(lustre_process_log);
 EXPORT_SYMBOL(lustre_end_log);
 EXPORT_SYMBOL(server_get_mount);
+EXPORT_SYMBOL(server_get_mount_2);
 EXPORT_SYMBOL(server_put_mount);
+EXPORT_SYMBOL(server_put_mount_2);
 EXPORT_SYMBOL(server_register_target);
 EXPORT_SYMBOL(server_name2index);
 EXPORT_SYMBOL(server_mti_print);
-- 
1.8.3.1