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Subject[RFC PATCH V2 07/22] x86/intel_rdt: Connect pseudo-locking directory to operations
Date
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.chatre@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 5698d66b6892..24d2def37797 100644
--- a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
+++ b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
@@ -1244,13 +1244,19 @@ 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);

@@ -1291,6 +1297,8 @@ 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:
@@ -1439,6 +1447,7 @@ 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);
@@ -1861,6 +1870,9 @@ 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
@@ -1970,6 +1982,9 @@ 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;

--
2.13.6
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