gfs2: Dump nrpages for inodes and their glocks

This patch is based on an idea from Steve Whitehouse. The idea is
to dump the number of pages for inodes in the glock dumps.
The additional locking required me to drop const from quite a few
places.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

1 files changed, 12 insertions, 4 deletions

diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
index f79ef9525e33..f15b4c57c4bd 100644
--- a/fs/gfs2/glops.c
+++ b/fs/gfs2/glops.c
@@ -467,17 +467,25 @@ static int inode_go_lock(struct gfs2_holder *gh)
  *
  */
 
-static void inode_go_dump(struct seq_file *seq, const struct gfs2_glock *gl)
+static void inode_go_dump(struct seq_file *seq, struct gfs2_glock *gl)
 {
-        const struct gfs2_inode *ip = gl->gl_object;
+        struct gfs2_inode *ip = gl->gl_object;
+        struct inode *inode = &ip->i_inode;
+        unsigned long nrpages;
+
         if (ip == NULL)
                 return;
-        gfs2_print_dbg(seq, " I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu\n",
+
+        xa_lock_irq(&inode->i_data.i_pages);
+        nrpages = inode->i_data.nrpages;
+        xa_unlock_irq(&inode->i_data.i_pages);
+
+        gfs2_print_dbg(seq, " I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu p:%lu\n",
                   (unsigned long long)ip->i_no_formal_ino,
                   (unsigned long long)ip->i_no_addr,
                   IF2DT(ip->i_inode.i_mode), ip->i_flags,
                   (unsigned int)ip->i_diskflags,
-                  (unsigned long long)i_size_read(&ip->i_inode));
+                  (unsigned long long)i_size_read(inode), nrpages);
 }
 
 /**