[RFC PATCH 07/20] x86/intel_rdt: Connect pseudo-locking directory to operations

[Reinette Chatre]

As a dependent of RDT/CAT we hook up the pseudo-locking files
initialization to that of RDT/CAT. The initial operations of mkdir/rmdir
used to create pseudo-locked regions are now hooked up also.

Signed-off-by: Reinette Chatre <reinette.cha...@intel.com>
---
 arch/x86/kernel/cpu/intel_rdt_rdtgroup.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c 
b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
index c711df201e57..afa3795a124e 100644
--- a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
+++ b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
@@ -1179,13 +1179,19 @@ static struct dentry *rdt_mount(struct file_system_type 
*fs_type,
                goto out_cdp;
        }
 
+       ret = rdt_pseudo_lock_fs_init(rdtgroup_default.kn);
+       if (ret) {
+               dentry = ERR_PTR(ret);
+               goto out_info;
+       }
+
        if (rdt_mon_capable) {
                ret = mongroup_create_dir(rdtgroup_default.kn,
                                          NULL, "mon_groups",
                                          &kn_mongrp);
                if (ret) {
                        dentry = ERR_PTR(ret);
-                       goto out_info;
+                       goto out_psl;
                }
                kernfs_get(kn_mongrp);
 
@@ -1226,6 +1232,8 @@ static struct dentry *rdt_mount(struct file_system_type 
*fs_type,
 out_mongrp:
        if (rdt_mon_capable)
                kernfs_remove(kn_mongrp);
+out_psl:
+       rdt_pseudo_lock_fs_remove();
 out_info:
        kernfs_remove(kn_info);
 out_cdp:
@@ -1374,6 +1382,7 @@ static void rmdir_all_sub(void)
        /* Notify online CPUs to update per cpu storage and PQR_ASSOC MSR */
        update_closid_rmid(cpu_online_mask, &rdtgroup_default);
 
+       rdt_pseudo_lock_fs_remove();
        kernfs_remove(kn_info);
        kernfs_remove(kn_mongrp);
        kernfs_remove(kn_mondata);
@@ -1796,6 +1805,9 @@ static int rdtgroup_mkdir(struct kernfs_node *parent_kn, 
const char *name,
        if (strchr(name, '\n'))
                return -EINVAL;
 
+       if (parent_kn == pseudo_lock_kn)
+               return rdt_pseudo_lock_mkdir(name, mode);
+
        /*
         * If the parent directory is the root directory and RDT
         * allocation is supported, add a control and monitoring
@@ -1905,6 +1917,9 @@ static int rdtgroup_rmdir(struct kernfs_node *kn)
        cpumask_var_t tmpmask;
        int ret = 0;
 
+       if (parent_kn == pseudo_lock_kn)
+               return rdt_pseudo_lock_rmdir(kn);
+
        if (!zalloc_cpumask_var(&tmpmask, GFP_KERNEL))
                return -ENOMEM;
 
-- 
2.13.5