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Commit 20d27e92 authored by Chuck Lever's avatar Chuck Lever Committed by Trond Myklebust
Browse files

NFS: Add a client-side function to display NFS file handles 



For debugging, introduce a simplistic function to print NFS file
handles on the system console.  The main function is hooked into the
dprintk debugging facility, but you can directly call the helper,
_nfs_display_fhandle(), if you want to print a handle unconditionally.

Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 31b8e2ae

fs/nfs/inode.c

+45 −0
Original line number Original line Diff line number Diff line
@@ -1045,6 +1045,51 @@ struct nfs_fh *nfs_alloc_fhandle(void) 
	return fh;

	return fh;

}

}





/**

 * _nfs_display_fhandle - display an NFS file handle on the console

 *

 * @fh: file handle to display

 * @caption: display caption

 *

 * For debugging only.

 */

#ifdef RPC_DEBUG

void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption)

{

	unsigned short i;



	if (fh->size == 0 || fh == NULL) {

		printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh);

		return;

	}



	printk(KERN_DEFAULT "%s at %p is %u bytes:\n", caption, fh, fh->size);

	for (i = 0; i < fh->size; i += 16) {

		__be32 *pos = (__be32 *)&fh->data[i];



		switch ((fh->size - i - 1) >> 2) {

		case 0:

			printk(KERN_DEFAULT " %08x\n",

				be32_to_cpup(pos));

			break;

		case 1:

			printk(KERN_DEFAULT " %08x %08x\n",

				be32_to_cpup(pos), be32_to_cpup(pos + 1));

			break;

		case 2:

			printk(KERN_DEFAULT " %08x %08x %08x\n",

				be32_to_cpup(pos), be32_to_cpup(pos + 1),

				be32_to_cpup(pos + 2));

			break;

		default:

			printk(KERN_DEFAULT " %08x %08x %08x %08x\n",

				be32_to_cpup(pos), be32_to_cpup(pos + 1),

				be32_to_cpup(pos + 2), be32_to_cpup(pos + 3));

		}

	}

}

#endif



/**

/**

 * nfs_inode_attrs_need_update - check if the inode attributes need updating

 * nfs_inode_attrs_need_update - check if the inode attributes need updating

 * @inode - pointer to inode

 * @inode - pointer to inode

include/linux/nfs_fs.h

+14 −0
Original line number Original line Diff line number Diff line
@@ -395,6 +395,20 @@ static inline void nfs_free_fhandle(const struct nfs_fh *fh) 
	kfree(fh);

	kfree(fh);

}

}





#ifdef RPC_DEBUG

extern void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption);

#define nfs_display_fhandle(fh, caption)			\

	do {							\

		if (unlikely(nfs_debug & NFSDBG_FACILITY))	\

			_nfs_display_fhandle(fh, caption);	\

	} while (0)

#else

static inline void nfs_display_fhandle(const struct nfs_fh *fh,

				       const char *caption)

{

}

#endif



/*

/*

 * linux/fs/nfs/nfsroot.c

 * linux/fs/nfs/nfsroot.c

 */

 */