1 files changed, 122 insertions, 0 deletions

diff --git a/fs/xfs/xfs_stats.c b/fs/xfs/xfs_stats.c
new file mode 100644
index 000000000000..76fdc5861932
--- /dev/null
+++ b/fs/xfs/xfs_stats.c
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+#include "xfs.h"
+#include <linux/proc_fs.h>
+
+DEFINE_PER_CPU(struct xfsstats, xfsstats);
+
+static int xfs_stat_proc_show(struct seq_file *m, void *v)
+{
+        int             c, i, j, val;
+        __uint64_t      xs_xstrat_bytes = 0;
+        __uint64_t      xs_write_bytes = 0;
+        __uint64_t      xs_read_bytes = 0;
+
+        static const struct xstats_entry {
+                char    *desc;
+                int     endpoint;
+        } xstats[] = {
+                { "extent_alloc",       XFSSTAT_END_EXTENT_ALLOC        },
+                { "abt",                XFSSTAT_END_ALLOC_BTREE         },
+                { "blk_map",            XFSSTAT_END_BLOCK_MAPPING       },
+                { "bmbt",               XFSSTAT_END_BLOCK_MAP_BTREE     },
+                { "dir",                XFSSTAT_END_DIRECTORY_OPS       },
+                { "trans",              XFSSTAT_END_TRANSACTIONS        },
+                { "ig",                 XFSSTAT_END_INODE_OPS           },
+                { "log",                XFSSTAT_END_LOG_OPS             },
+                { "push_ail",           XFSSTAT_END_TAIL_PUSHING        },
+                { "xstrat",             XFSSTAT_END_WRITE_CONVERT       },
+                { "rw",                 XFSSTAT_END_READ_WRITE_OPS      },
+                { "attr",               XFSSTAT_END_ATTRIBUTE_OPS       },
+                { "icluster",           XFSSTAT_END_INODE_CLUSTER       },
+                { "vnodes",             XFSSTAT_END_VNODE_OPS           },
+                { "buf",                XFSSTAT_END_BUF                 },
+                { "abtb2",              XFSSTAT_END_ABTB_V2             },
+                { "abtc2",              XFSSTAT_END_ABTC_V2             },
+                { "bmbt2",              XFSSTAT_END_BMBT_V2             },
+                { "ibt2",               XFSSTAT_END_IBT_V2              },
+        };
+
+        /* Loop over all stats groups */
+        for (i=j = 0; i < ARRAY_SIZE(xstats); i++) {
+                seq_printf(m, "%s", xstats[i].desc);
+                /* inner loop does each group */
+                while (j < xstats[i].endpoint) {
+                        val = 0;
+                        /* sum over all cpus */
+                        for_each_possible_cpu(c)
+                                val += *(((__u32*)&per_cpu(xfsstats, c) + j));
+                        seq_printf(m, " %u", val);
+                        j++;
+                }
+                seq_putc(m, '\n');
+        }
+        /* extra precision counters */
+        for_each_possible_cpu(i) {
+                xs_xstrat_bytes += per_cpu(xfsstats, i).xs_xstrat_bytes;
+                xs_write_bytes += per_cpu(xfsstats, i).xs_write_bytes;
+                xs_read_bytes += per_cpu(xfsstats, i).xs_read_bytes;
+        }
+
+        seq_printf(m, "xpc %Lu %Lu %Lu\n",
+                        xs_xstrat_bytes, xs_write_bytes, xs_read_bytes);
+        seq_printf(m, "debug %u\n",
+#if defined(DEBUG)
+                1);
+#else
+                0);
+#endif
+        return 0;
+}
+
+static int xfs_stat_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, xfs_stat_proc_show, NULL);
+}
+
+static const struct file_operations xfs_stat_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = xfs_stat_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
+int
+xfs_init_procfs(void)
+{
+        if (!proc_mkdir("fs/xfs", NULL))
+                goto out;
+
+        if (!proc_create("fs/xfs/stat", 0, NULL,
+                         &xfs_stat_proc_fops))
+                goto out_remove_entry;
+        return 0;
+
+ out_remove_entry:
+        remove_proc_entry("fs/xfs", NULL);
+ out:
+        return -ENOMEM;
+}
+
+void
+xfs_cleanup_procfs(void)
+{
+        remove_proc_entry("fs/xfs/stat", NULL);
+        remove_proc_entry("fs/xfs", NULL);
+}