1 files changed, 132 insertions, 0 deletions

diff --git a/fs/xfs/linux-2.6/xfs_stats.c b/fs/xfs/linux-2.6/xfs_stats.c
new file mode 100644
index 000000000000..aaf5ddba47f3
--- /dev/null
+++ b/fs/xfs/linux-2.6/xfs_stats.c
@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 2000-2003 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 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.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+
+#include "xfs.h"
+#include <linux/proc_fs.h>
+
+DEFINE_PER_CPU(struct xfsstats, xfsstats);
+
+STATIC int
+xfs_read_xfsstats(
+        char            *buffer,
+        char            **start,
+        off_t           offset,
+        int             count,
+        int             *eof,
+        void            *data)
+{
+        int             c, i, j, len, val;
+        __uint64_t      xs_xstrat_bytes = 0;
+        __uint64_t      xs_write_bytes = 0;
+        __uint64_t      xs_read_bytes = 0;
+
+        static 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                 },
+        };
+
+        /* Loop over all stats groups */
+        for (i=j=len = 0; i < sizeof(xstats)/sizeof(struct xstats_entry); i++) {
+                len += sprintf(buffer + len, xstats[i].desc);
+                /* inner loop does each group */
+                while (j < xstats[i].endpoint) {
+                        val = 0;
+                        /* sum over all cpus */
+                        for (c = 0; c < NR_CPUS; c++) {
+                                if (!cpu_possible(c)) continue;
+                                val += *(((__u32*)&per_cpu(xfsstats, c) + j));
+                        }
+                        len += sprintf(buffer + len, " %u", val);
+                        j++;
+                }
+                buffer[len++] = '\n';
+        }
+        /* extra precision counters */
+        for (i = 0; i < NR_CPUS; i++) {
+                if (!cpu_possible(i)) continue;
+                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;
+        }
+
+        len += sprintf(buffer + len, "xpc %Lu %Lu %Lu\n",
+                        xs_xstrat_bytes, xs_write_bytes, xs_read_bytes);
+        len += sprintf(buffer + len, "debug %u\n",
+#if defined(DEBUG)
+                1);
+#else
+                0);
+#endif
+
+        if (offset >= len) {
+                *start = buffer;
+                *eof = 1;
+                return 0;
+        }
+        *start = buffer + offset;
+        if ((len -= offset) > count)
+                return count;
+        *eof = 1;
+
+        return len;
+}
+
+void
+xfs_init_procfs(void)
+{
+        if (!proc_mkdir("fs/xfs", NULL))
+                return;
+        create_proc_read_entry("fs/xfs/stat", 0, NULL, xfs_read_xfsstats, NULL);
+}
+
+void
+xfs_cleanup_procfs(void)
+{
+        remove_proc_entry("fs/xfs/stat", NULL);
+        remove_proc_entry("fs/xfs", NULL);
+}