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LU-921 llite: warning in case of discarding dirty pages
[fs/lustre-release.git] / lustre / llite / llite_lib.c
index 0566ab2..f1aa2af 100644 (file)
@@ -2407,3 +2407,48 @@ char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
 
        return buf;
 }
+
+static char* ll_d_path(struct dentry *dentry, char *buf, int bufsize)
+{
+       char *path = NULL;
+
+#ifdef HAVE_FS_STRUCT_USE_PATH
+       struct path p;
+
+       p.dentry = dentry;
+       p.mnt = current->fs->root.mnt;
+       path_get(&p);
+       path = d_path(&p, buf, bufsize);
+       path_put(&p);
+#else
+       path = d_path(dentry, current->fs->rootmnt, buf, bufsize);
+#endif
+
+       return path;
+}
+
+void ll_dirty_page_discard_warn(cfs_page_t *page, int ioret)
+{
+       char *buf, *path = NULL;
+       struct dentry *dentry = NULL;
+       struct ccc_object *obj = cl_inode2ccc(page->mapping->host);
+
+       buf = (char *)__get_free_page(GFP_KERNEL);
+       if (buf != NULL) {
+               dentry = d_find_alias(page->mapping->host);
+               if (dentry != NULL)
+                       path = ll_d_path(dentry, buf, PAGE_SIZE);
+       }
+
+       CWARN("%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
+             "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
+             s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
+             PFID(&obj->cob_header.coh_lu.loh_fid),
+             (path && !IS_ERR(path)) ? path : "", ioret);
+
+       if (dentry != NULL)
+               dput(dentry);
+
+       if (buf != NULL)
+               free_page((unsigned long)buf);
+}