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b4b9d2ccf0
It's possible to get a dump of the RPC task queue by writing a value to
/proc/sys/sunrpc/rpc_debug. If you write any value to that file, you get
a dump of the RPC client task list into the log buffer. This is a rather
inconvenient interface however, and makes it hard to get immediate info
about the task queue.
Add a new directory hierarchy under debugfs:
sunrpc/
rpc_clnt/
<clientid>/
Within each clientid directory we create a new "tasks" file that will
dump info similar to what shows up in the log buffer, but with a few
small differences -- we avoid printing raw kernel addresses in favor of
symbolic names and the XID is also displayed.
Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
93 lines
1.8 KiB
C
93 lines
1.8 KiB
C
/*
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* linux/include/linux/sunrpc/debug.h
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*
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* Debugging support for sunrpc module
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*
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* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
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*/
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#ifndef _LINUX_SUNRPC_DEBUG_H_
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#define _LINUX_SUNRPC_DEBUG_H_
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#include <uapi/linux/sunrpc/debug.h>
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/*
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* Debugging macros etc
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*/
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#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
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extern unsigned int rpc_debug;
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extern unsigned int nfs_debug;
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extern unsigned int nfsd_debug;
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extern unsigned int nlm_debug;
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#endif
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#define dprintk(args...) dfprintk(FACILITY, ## args)
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#define dprintk_rcu(args...) dfprintk_rcu(FACILITY, ## args)
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#undef ifdebug
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#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
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# define ifdebug(fac) if (unlikely(rpc_debug & RPCDBG_##fac))
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# define dfprintk(fac, args...) \
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do { \
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ifdebug(fac) \
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printk(KERN_DEFAULT args); \
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} while (0)
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# define dfprintk_rcu(fac, args...) \
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do { \
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ifdebug(fac) { \
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rcu_read_lock(); \
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printk(KERN_DEFAULT args); \
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rcu_read_unlock(); \
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} \
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} while (0)
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# define RPC_IFDEBUG(x) x
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#else
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# define ifdebug(fac) if (0)
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# define dfprintk(fac, args...) do {} while (0)
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# define dfprintk_rcu(fac, args...) do {} while (0)
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# define RPC_IFDEBUG(x)
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#endif
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/*
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* Sysctl interface for RPC debugging
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*/
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struct rpc_clnt;
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#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
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void rpc_register_sysctl(void);
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void rpc_unregister_sysctl(void);
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int sunrpc_debugfs_init(void);
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void sunrpc_debugfs_exit(void);
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int rpc_clnt_debugfs_register(struct rpc_clnt *);
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void rpc_clnt_debugfs_unregister(struct rpc_clnt *);
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#else
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static inline int
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sunrpc_debugfs_init(void)
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{
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return 0;
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}
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static inline void
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sunrpc_debugfs_exit(void)
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{
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return;
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}
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static inline int
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rpc_clnt_debugfs_register(struct rpc_clnt *clnt)
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{
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return 0;
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}
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static inline void
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rpc_clnt_debugfs_unregister(struct rpc_clnt *clnt)
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{
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return;
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}
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#endif
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#endif /* _LINUX_SUNRPC_DEBUG_H_ */
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