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NFS: Add tracepoints for debugging NFS hard links 

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2013-08-21 13:54:44 -04:00
parent 70ded20170
commit 1fd1085b49
2 changed files with 72 additions and 0 deletions
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2
fs/nfs/dir.c
View File

@ -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, old_dentry->d_parent->d_name.name, old_dentry->d_name.name,
dentry->d_parent->d_name.name, 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); NFS_PROTO(inode)->return_delegation(inode);
d_drop(dentry); d_drop(dentry);
@ -1868,6 +1869,7 @@ nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
ihold(inode); ihold(inode);
d_add(dentry, inode); d_add(dentry, inode);
} }
trace_nfs_link_exit(inode, dir, dentry, error);
return error; return error;
} }
EXPORT_SYMBOL_GPL(nfs_link); EXPORT_SYMBOL_GPL(nfs_link);

70
fs/nfs/nfstrace.h
View File

@ -512,6 +512,76 @@ DEFINE_NFS_DIRECTORY_EVENT_DONE(nfs_unlink_exit);
DEFINE_NFS_DIRECTORY_EVENT(nfs_symlink_enter); DEFINE_NFS_DIRECTORY_EVENT(nfs_symlink_enter);
DEFINE_NFS_DIRECTORY_EVENT_DONE(nfs_symlink_exit); 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, DECLARE_EVENT_CLASS(nfs_rename_event,
TP_PROTO( TP_PROTO(
const struct inode *old_dir, const struct inode *old_dir,