ocfs2: Call refcount tree remove process properly.

Now with xattr refcount support, we need to check whether
we have xattr refcounted before we remove the refcount tree.

Now the mechanism is:
1) Check whether i_clusters == 0, if no, exit.
2) check whether we have i_xattr_loc in dinode. if yes, exit.
2) Check whether we have inline xattr stored outside, if yes, exit.
4) Remove the tree.

Signed-off-by: Tao Ma <tao.ma@oracle.com>

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 75f5b81..2effac5 100644 (file)
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -531,6 +531,8 @@ bail_unlock_sem:
        up_write(&OCFS2_I(inode)->ip_alloc_sem);
 
 bail:
+       if (!status && OCFS2_I(inode)->ip_clusters == 0)
+               status = ocfs2_try_remove_refcount_tree(inode, di_bh);
 
        mlog_exit(status);
        return status;

diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index e82ceb3..0297fb8 100644 (file)
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -53,6 +53,7 @@
 #include "sysfile.h"
 #include "uptodate.h"
 #include "xattr.h"
+#include "refcounttree.h"
 
 #include "buffer_head_io.h"
 
@@ -782,6 +783,12 @@ static int ocfs2_wipe_inode(struct inode *inode,
                goto bail_unlock_dir;
        }
 
+       status = ocfs2_remove_refcount_tree(inode, di_bh);
+       if (status < 0) {
+               mlog_errno(status);
+               goto bail_unlock_dir;
+       }
+
        status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
                                    orphan_dir_bh);
        if (status < 0)

diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index a85c01c..5656c68 100644 (file)
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -926,6 +926,42 @@ out:
        *index = i;
 }
 
+/*
+ * Try to remove refcount tree. The mechanism is:
+ * 1) Check whether i_clusters == 0, if no, exit.
+ * 2) check whether we have i_xattr_loc in dinode. if yes, exit.
+ * 3) Check whether we have inline xattr stored outside, if yes, exit.
+ * 4) Remove the tree.
+ */
+int ocfs2_try_remove_refcount_tree(struct inode *inode,
+                                  struct buffer_head *di_bh)
+{
+       int ret;
+       struct ocfs2_inode_info *oi = OCFS2_I(inode);
+       struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
+
+       down_write(&oi->ip_xattr_sem);
+       down_write(&oi->ip_alloc_sem);
+
+       if (oi->ip_clusters)
+               goto out;
+
+       if ((oi->ip_dyn_features & OCFS2_HAS_XATTR_FL) && di->i_xattr_loc)
+               goto out;
+
+       if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL &&
+           ocfs2_has_inline_xattr_value_outside(inode, di))
+               goto out;
+
+       ret = ocfs2_remove_refcount_tree(inode, di_bh);
+       if (ret)
+               mlog_errno(ret);
+out:
+       up_write(&oi->ip_alloc_sem);
+       up_write(&oi->ip_xattr_sem);
+       return 0;
+}
+
 /*
  * Given a cpos and len, try to find the refcount record which contains cpos.
  * 1. If cpos can be found in one refcount record, return the record.

diff --git a/fs/ocfs2/refcounttree.h b/fs/ocfs2/refcounttree.h
index 7d6900c..1e3446a 100644 (file)
--- a/fs/ocfs2/refcounttree.h
+++ b/fs/ocfs2/refcounttree.h
@@ -90,4 +90,7 @@ int ocfs2_add_refcount_flag(struct inode *inode,
                            u32 cpos, u32 p_cluster, u32 num_clusters,
                            struct ocfs2_cached_dealloc_ctxt *dealloc,
                            struct ocfs2_post_refcount *post);
+int ocfs2_remove_refcount_tree(struct inode *inode, struct buffer_head *di_bh);
+int ocfs2_try_remove_refcount_tree(struct inode *inode,
+                                  struct buffer_head *di_bh);
 #endif /* OCFS2_REFCOUNTTREE_H */

diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index 501539a..6660f1c 100644 (file)
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -840,6 +840,23 @@ static int ocfs2_xattr_list_entries(struct inode *inode,
        return result;
 }
 
+int ocfs2_has_inline_xattr_value_outside(struct inode *inode,
+                                        struct ocfs2_dinode *di)
+{
+       struct ocfs2_xattr_header *xh;
+       int i;
+
+       xh = (struct ocfs2_xattr_header *)
+                ((void *)di + inode->i_sb->s_blocksize -
+                le16_to_cpu(di->i_xattr_inline_size));
+
+       for (i = 0; i < le16_to_cpu(xh->xh_count); i++)
+               if (!ocfs2_xattr_is_local(&xh->xh_entries[i]))
+                       return 1;
+
+       return 0;
+}
+
 static int ocfs2_xattr_ibody_list(struct inode *inode,
                                  struct ocfs2_dinode *di,
                                  char *buffer,
@@ -2898,10 +2915,16 @@ int ocfs2_xattr_set(struct inode *inode,
        if (ocfs2_dealloc_has_cluster(&ctxt.dealloc))
                ocfs2_schedule_truncate_log_flush(osb, 1);
        ocfs2_run_deallocs(osb, &ctxt.dealloc);
+
 cleanup:
        if (ref_tree)
                ocfs2_unlock_refcount_tree(osb, ref_tree, 1);
        up_write(&OCFS2_I(inode)->ip_xattr_sem);
+       if (!value && !ret) {
+               ret = ocfs2_try_remove_refcount_tree(inode, di_bh);
+               if (ret)
+                       mlog_errno(ret);
+       }
        ocfs2_inode_unlock(inode, 1);
 cleanup_nolock:
        brelse(di_bh);

diff --git a/fs/ocfs2/xattr.h b/fs/ocfs2/xattr.h
index a3295d7..e74703f 100644 (file)
--- a/fs/ocfs2/xattr.h
+++ b/fs/ocfs2/xattr.h
@@ -55,6 +55,8 @@ int ocfs2_xattr_set_handle(handle_t *, struct inode *, struct buffer_head *,
                           int, const char *, const void *, size_t, int,
                           struct ocfs2_alloc_context *,
                           struct ocfs2_alloc_context *);
+int ocfs2_has_inline_xattr_value_outside(struct inode *inode,
+                                        struct ocfs2_dinode *di);
 int ocfs2_xattr_remove(struct inode *, struct buffer_head *);
 int ocfs2_init_security_get(struct inode *, struct inode *,
                            struct ocfs2_security_xattr_info *);