NFSv4: Add tracepoints for debugging file open
Set up basic tracepoints for debugging NFSv4 file open/close
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h
index 9653feb..a558dc9 100644
--- a/fs/nfs/nfs4trace.h
+++ b/fs/nfs/nfs4trace.h
@@ -161,6 +161,19 @@
{ -NFS4ERR_WRONG_TYPE, "WRONG_TYPE" }, \
{ -NFS4ERR_XDEV, "XDEV" })
+#define show_open_flags(flags) \
+ __print_flags(flags, "|", \
+ { O_CREAT, "O_CREAT" }, \
+ { O_EXCL, "O_EXCL" }, \
+ { O_TRUNC, "O_TRUNC" }, \
+ { O_DIRECT, "O_DIRECT" })
+
+#define show_fmode_flags(mode) \
+ __print_flags(mode, "|", \
+ { ((__force unsigned long)FMODE_READ), "READ" }, \
+ { ((__force unsigned long)FMODE_WRITE), "WRITE" }, \
+ { ((__force unsigned long)FMODE_EXEC), "EXEC" })
+
DECLARE_EVENT_CLASS(nfs4_clientid_event,
TP_PROTO(
const struct nfs_client *clp,
@@ -211,6 +224,118 @@
DEFINE_NFS4_CLIENTID_EVENT(nfs4_reclaim_complete);
#endif /* CONFIG_NFS_V4_1 */
+DECLARE_EVENT_CLASS(nfs4_open_event,
+ TP_PROTO(
+ const struct nfs_open_context *ctx,
+ int flags,
+ int error
+ ),
+
+ TP_ARGS(ctx, flags, error),
+
+ TP_STRUCT__entry(
+ __field(int, error)
+ __field(unsigned int, flags)
+ __field(unsigned int, fmode)
+ __field(dev_t, dev)
+ __field(u32, fhandle)
+ __field(u64, fileid)
+ __field(u64, dir)
+ __string(name, ctx->dentry->d_name.name)
+ ),
+
+ TP_fast_assign(
+ const struct nfs4_state *state = ctx->state;
+ const struct inode *inode = NULL;
+
+ __entry->error = error;
+ __entry->flags = flags;
+ __entry->fmode = (__force unsigned int)ctx->mode;
+ __entry->dev = ctx->dentry->d_sb->s_dev;
+ if (!IS_ERR(state))
+ inode = state->inode;
+ if (inode != NULL) {
+ __entry->fileid = NFS_FILEID(inode);
+ __entry->fhandle = nfs_fhandle_hash(NFS_FH(inode));
+ } else {
+ __entry->fileid = 0;
+ __entry->fhandle = 0;
+ }
+ __entry->dir = NFS_FILEID(ctx->dentry->d_parent->d_inode);
+ __assign_str(name, ctx->dentry->d_name.name);
+ ),
+
+ TP_printk(
+ "error=%d (%s) flags=%d (%s) fmode=%s "
+ "fileid=%02x:%02x:%llu fhandle=0x%08x "
+ "name=%02x:%02x:%llu/%s",
+ __entry->error,
+ show_nfsv4_errors(__entry->error),
+ __entry->flags,
+ show_open_flags(__entry->flags),
+ show_fmode_flags(__entry->fmode),
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ (unsigned long long)__entry->fileid,
+ __entry->fhandle,
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ (unsigned long long)__entry->dir,
+ __get_str(name)
+ )
+);
+
+#define DEFINE_NFS4_OPEN_EVENT(name) \
+ DEFINE_EVENT(nfs4_open_event, name, \
+ TP_PROTO( \
+ const struct nfs_open_context *ctx, \
+ int flags, \
+ int error \
+ ), \
+ TP_ARGS(ctx, flags, error))
+DEFINE_NFS4_OPEN_EVENT(nfs4_open_reclaim);
+DEFINE_NFS4_OPEN_EVENT(nfs4_open_expired);
+DEFINE_NFS4_OPEN_EVENT(nfs4_open_file);
+
+TRACE_EVENT(nfs4_close,
+ TP_PROTO(
+ const struct nfs4_state *state,
+ const struct nfs_closeargs *args,
+ const struct nfs_closeres *res,
+ int error
+ ),
+
+ TP_ARGS(state, args, res, error),
+
+ TP_STRUCT__entry(
+ __field(dev_t, dev)
+ __field(u32, fhandle)
+ __field(u64, fileid)
+ __field(unsigned int, fmode)
+ __field(int, error)
+ ),
+
+ TP_fast_assign(
+ const struct inode *inode = state->inode;
+
+ __entry->dev = inode->i_sb->s_dev;
+ __entry->fileid = NFS_FILEID(inode);
+ __entry->fhandle = nfs_fhandle_hash(NFS_FH(inode));
+ __entry->fmode = (__force unsigned int)state->state;
+ __entry->error = error;
+ ),
+
+ TP_printk(
+ "error=%d (%s) fmode=%s fileid=%02x:%02x:%llu "
+ "fhandle=0x%08x",
+ __entry->error,
+ show_nfsv4_errors(__entry->error),
+ __entry->fmode ? show_fmode_flags(__entry->fmode) :
+ "closed",
+ MAJOR(__entry->dev), MINOR(__entry->dev),
+ (unsigned long long)__entry->fileid,
+ __entry->fhandle
+ )
+);
+
#endif /* _TRACE_NFS4_H */
#undef TRACE_INCLUDE_PATH