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authorTrond Myklebust <Trond.Myklebust@netapp.com>2013-08-21 13:54:44 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2013-08-22 08:58:20 -0400
commit1fd1085b49f8cafbd0ce4e4682c209a31f7b287f (patch)
tree82bc8631aedfc1e5d633c4357c7a378e93f11505
parent70ded2017072ae16aeaa7fb2a15a879a475161a6 (diff)
downloadop-kernel-dev-1fd1085b49f8cafbd0ce4e4682c209a31f7b287f.zip
op-kernel-dev-1fd1085b49f8cafbd0ce4e4682c209a31f7b287f.tar.gz
NFS: Add tracepoints for debugging NFS hard links
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
-rw-r--r--fs/nfs/dir.c2
-rw-r--r--fs/nfs/nfstrace.h70
2 files changed, 72 insertions, 0 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index dca7deb..4ce7f76 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1860,6 +1860,7 @@ nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
old_dentry->d_parent->d_name.name, old_dentry->d_name.name,
dentry->d_parent->d_name.name, dentry->d_name.name);
+ trace_nfs_link_enter(inode, dir, dentry);
NFS_PROTO(inode)->return_delegation(inode);
d_drop(dentry);
@@ -1868,6 +1869,7 @@ nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
ihold(inode);
d_add(dentry, inode);
}
+ trace_nfs_link_exit(inode, dir, dentry, error);
return error;
}
EXPORT_SYMBOL_GPL(nfs_link);
diff --git a/fs/nfs/nfstrace.h b/fs/nfs/nfstrace.h
index a20f0d1..89fe741 100644
--- a/fs/nfs/nfstrace.h
+++ b/fs/nfs/nfstrace.h
@@ -512,6 +512,76 @@ DEFINE_NFS_DIRECTORY_EVENT_DONE(nfs_unlink_exit);
DEFINE_NFS_DIRECTORY_EVENT(nfs_symlink_enter);
DEFINE_NFS_DIRECTORY_EVENT_DONE(nfs_symlink_exit);
+TRACE_EVENT(nfs_link_enter,
+ TP_PROTO(
+ const struct inode *inode,
+ const struct inode *dir,
+ const struct dentry *dentry
+ ),
+
+ TP_ARGS(inode, dir, dentry),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(u64, fileid)
+ __field(u64, dir)
+ __string(name, dentry->d_name.name)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->fileid = NFS_FILEID(inode);
+ __entry->dir = NFS_FILEID(dir);
+ __assign_str(name, dentry->d_name.name);
+ ),
+
+ TP_printk(
+ "fileid=%02x:%02x:%llu name=%02x:%02x:%llu/%s",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ __entry->fileid,
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ (unsigned long long)__entry->dir,
+ __get_str(name)
+ )
+);
+
+TRACE_EVENT(nfs_link_exit,
+ TP_PROTO(
+ const struct inode *inode,
+ const struct inode *dir,
+ const struct dentry *dentry,
+ int error
+ ),
+
+ TP_ARGS(inode, dir, dentry, error),
+
+ TP_STRUCT__entry(
+ __field(int, error)
+ __field(dev_t, dev)
+ __field(u64, fileid)
+ __field(u64, dir)
+ __string(name, dentry->d_name.name)
+ ),
+
+ TP_fast_assign(
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->fileid = NFS_FILEID(inode);
+ __entry->dir = NFS_FILEID(dir);
+ __entry->error = error;
+ __assign_str(name, dentry->d_name.name);
+ ),
+
+ TP_printk(
+ "error=%d fileid=%02x:%02x:%llu name=%02x:%02x:%llu/%s",
+ __entry->error,
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ __entry->fileid,
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ (unsigned long long)__entry->dir,
+ __get_str(name)
+ )
+);
+
DECLARE_EVENT_CLASS(nfs_rename_event,
TP_PROTO(
const struct inode *old_dir,
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