Very simple ones, just to make the further patching simpler.
Signed-off-by: Pavel Emelyanov <xemul@xxxxxxxxxx>
---
fs/dcache.c | 30 ++++++++++++++++++++++++++++++
include/linux/dcache.h | 7 +++++++
2 files changed, 37 insertions(+), 0 deletions(-)
diff --git a/fs/dcache.c b/fs/dcache.c
index 51fb998..bdacea3 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -3006,6 +3006,36 @@ int dcache_new_mob(struct dentry *root)
return 0;
}
+int dcache_set_mob_size(struct dentry *de, unsigned long size)
+{
+ struct dentry_mob *mob = de->d_mob;
+ unsigned long usage;
+
+ if (mob == &init_dentry_mob) /* for safety */
+ return 0;
+
+ mob->nr_dentry_max = size;
+ usage = percpu_counter_sum_positive(&mob->nr_dentry);
+ if (usage > mob->nr_dentry_max)
+ prune_dcache(mob, usage - mob->nr_dentry_max);
+
+ return 0;
+}
+
+int dcache_get_mob_stat(struct dentry *de, struct dentry_mob_stat __user *stat)
+{
+ struct dentry_mob *mob = de->d_mob;
+ struct dentry_mob_stat kstat;
+
+ kstat.nr_dentry = percpu_counter_sum_positive(&mob->nr_dentry);
+ kstat.nr_dentry_max = mob->nr_dentry_max;
+
+ if (copy_to_user(stat, &kstat, sizeof(kstat)))
+ return -EFAULT;
+
+ return 0;
+}
+
static __initdata unsigned long dhash_entries;
static int __init set_dhash_entries(char *str)
{
diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 3681307..0d13966 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -55,7 +55,14 @@ struct dentry_mob {
};
struct dentry;
+struct dentry_mob_stat {
+ unsigned long nr_dentry;
+ unsigned long nr_dentry_max;
+};
+
int dcache_new_mob(struct dentry *root);
+int dcache_set_mob_size(struct dentry *de, unsigned long size);
+int dcache_get_mob_stat(struct dentry *de, struct dentry_mob_stat __user *stat);
/*
* Compare 2 name strings, return 0 if they match, otherwise non-zero.
--
1.5.5.6
--
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