LU-1778 llite: fix inconsistencies of root squash feature

[fs/lustre-release.git] / lustre / llite / lproc_llite.c

diff --git a/lustre/llite/lproc_llite.c b/lustre/llite/lproc_llite.c
index 97cfc09..8595822 100644 (file)
--- a/lustre/llite/lproc_llite.c
+++ b/lustre/llite/lproc_llite.c
@@ -831,6 +831,71 @@ static int ll_unstable_stats_seq_show(struct seq_file *m, void *v)
 }
 LPROC_SEQ_FOPS_RO(ll_unstable_stats);
 
+static int ll_root_squash_seq_show(struct seq_file *m, void *v)
+{
+       struct super_block *sb = m->private;
+       struct ll_sb_info *sbi = ll_s2sbi(sb);
+       struct root_squash_info *squash = &sbi->ll_squash;
+
+       return seq_printf(m, "%u:%u\n", squash->rsi_uid, squash->rsi_gid);
+}
+
+static ssize_t ll_root_squash_seq_write(struct file *file,
+                                       const char __user *buffer,
+                                       size_t count, loff_t *off)
+{
+       struct seq_file *m = file->private_data;
+       struct super_block *sb = m->private;
+       struct ll_sb_info *sbi = ll_s2sbi(sb);
+       struct root_squash_info *squash = &sbi->ll_squash;
+
+       return lprocfs_wr_root_squash(buffer, count, squash,
+                                     ll_get_fsname(sb, NULL, 0));
+}
+LPROC_SEQ_FOPS(ll_root_squash);
+
+static int ll_nosquash_nids_seq_show(struct seq_file *m, void *v)
+{
+       struct super_block *sb = m->private;
+       struct ll_sb_info *sbi = ll_s2sbi(sb);
+       struct root_squash_info *squash = &sbi->ll_squash;
+       int len, rc;
+
+       down_read(&squash->rsi_sem);
+       if (!list_empty(&squash->rsi_nosquash_nids)) {
+               len = cfs_print_nidlist(m->buf + m->count, m->size - m->count,
+                                       &squash->rsi_nosquash_nids);
+               m->count += len;
+               rc = seq_printf(m, "\n");
+       } else {
+               rc = seq_printf(m, "NONE\n");
+       }
+       up_read(&squash->rsi_sem);
+
+       return rc;
+}
+
+static ssize_t ll_nosquash_nids_seq_write(struct file *file,
+                                         const char __user *buffer,
+                                         size_t count, loff_t *off)
+{
+       struct seq_file *m = file->private_data;
+       struct super_block *sb = m->private;
+       struct ll_sb_info *sbi = ll_s2sbi(sb);
+       struct root_squash_info *squash = &sbi->ll_squash;
+       int rc;
+
+       rc = lprocfs_wr_nosquash_nids(buffer, count, squash,
+                                     ll_get_fsname(sb, NULL, 0));
+       if (rc < 0)
+               return rc;
+
+       ll_compute_rootsquash_state(sbi);
+
+       return rc;
+}
+LPROC_SEQ_FOPS(ll_nosquash_nids);
+
 struct lprocfs_seq_vars lprocfs_llite_obd_vars[] = {
        { .name =       "uuid",
          .fops =       &ll_sb_uuid_fops                        },
@@ -892,6 +957,10 @@ struct lprocfs_seq_vars lprocfs_llite_obd_vars[] = {
          .fops =       &ll_xattr_cache_fops                    },
        { .name =       "unstable_stats",
          .fops =       &ll_unstable_stats_fops                 },
+       { .name =       "root_squash",
+         .fops =       &ll_root_squash_fops                    },
+       { .name =       "nosquash_nids",
+         .fops =       &ll_nosquash_nids_fops                  },
        { 0 }
 };