LU-7795 quota: tuneable soft least qunit

[fs/lustre-release.git] / lustre / quota / qmt_pool.c

diff --git a/lustre/quota/qmt_pool.c b/lustre/quota/qmt_pool.c
index 78e1acb..47f5b12 100644 (file)
--- a/lustre/quota/qmt_pool.c
+++ b/lustre/quota/qmt_pool.c
@@ -171,9 +171,52 @@ static int qpi_state_seq_show(struct seq_file *m, void *data)
 }
 LPROC_SEQ_FOPS_RO(qpi_state);
 
+static int qpi_soft_least_qunit_seq_show(struct seq_file *m, void *data)
+{
+       struct qmt_pool_info    *pool = m->private;
+       LASSERT(pool != NULL);
+
+       return seq_printf(m, "%lu\n", pool->qpi_soft_least_qunit);
+}
+
+static ssize_t
+qpi_soft_least_qunit_seq_write(struct file *file, const char __user *buffer,
+                              size_t count, loff_t *off)
+{
+       struct qmt_pool_info    *pool;
+       int     qunit, rc;
+       s64     least_qunit;
+
+       pool = ((struct seq_file *)file->private_data)->private;
+       LASSERT(pool != NULL);
+
+       /* Not tuneable for inode limit */
+       if (pool->qpi_key >> 16 != LQUOTA_RES_DT)
+               return -EINVAL;
+
+       rc = lprocfs_str_to_s64(buffer, count, &least_qunit);
+       if (rc)
+               return rc;
+
+       /* Miminal qpi_soft_least_qunit */
+       qunit = pool->qpi_least_qunit << 2;
+       /* The value must be power of miminal qpi_soft_least_qunit, see
+        * how the qunit is adjusted in qmt_adjust_qunit(). */
+       while (qunit > 0 && qunit < least_qunit)
+               qunit <<= 2;
+       if (qunit <= 0)
+               qunit = INT_MAX & ~3;
+
+       pool->qpi_soft_least_qunit = qunit;
+       return count;
+}
+LPROC_SEQ_FOPS(qpi_soft_least_qunit);
+
 static struct lprocfs_vars lprocfs_quota_qpi_vars[] = {
        { .name =       "info",
          .fops =       &qpi_state_fops },
+       { .name =       "soft_least_qunit",
+         .fops =       &qpi_soft_least_qunit_fops },
        { NULL }
 };
 
@@ -211,6 +254,10 @@ static int qmt_pool_alloc(const struct lu_env *env, struct qmt_device *qmt,
 
        /* set up least qunit size to use for this pool */
        pool->qpi_least_qunit = LQUOTA_LEAST_QUNIT(pool_type);
+       if (pool_type == LQUOTA_RES_DT)
+               pool->qpi_soft_least_qunit = pool->qpi_least_qunit << 2;
+       else
+               pool->qpi_soft_least_qunit = pool->qpi_least_qunit;
 
        /* create pool proc directory */
        sprintf(qti->qti_buf, "%s-0x%x", RES_NAME(pool_type), pool_id);