nfs_display_fhandle() is a lame client-side function to display
file handles on the console. It is for debugging only.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
fs/nfs/inode.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
include/linux/nfs_fs.h | 13 +++++++++++++
2 files changed, 57 insertions(+), 0 deletions(-)
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 1cc600e..1325160 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1033,6 +1033,50 @@ struct nfs_fh *nfs_alloc_fhandle(void)
}
/**
+ * _nfs_display_fhandle - display an NFS file handle on the console
+ *
+ * @fh: file handle to display
+ *
+ * For debugging only.
+ */
+#ifdef RPC_DEBUG
+void _nfs_display_fhandle(const struct nfs_fh *fh)
+{
+ unsigned short i;
+
+ if (fh->size == 0 || fh == NULL) {
+ printk(KERN_NOTICE "Empty NFS file handle at %p\n", fh);
+ return;
+ }
+
+ printk(KERN_NOTICE "NFS file handle at %p (size %u):\n", 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_NOTICE " %08x",
+ be32_to_cpup(pos));
+ break;
+ case 1:
+ printk(KERN_NOTICE " %08x %08x\n",
+ be32_to_cpup(pos), be32_to_cpup(pos + 1));
+ break;
+ case 2:
+ printk(KERN_NOTICE " %08x %08x %08x\n",
+ be32_to_cpup(pos), be32_to_cpup(pos + 1),
+ be32_to_cpup(pos + 2));
+ break;
+ default:
+ printk(KERN_NOTICE " %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
* @inode - pointer to inode
* @fattr - attributes
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 6023efa..511e22a 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -384,6 +384,19 @@ static inline void nfs_free_fhandle(const struct nfs_fh *fh)
kfree(fh);
}
+#ifdef RPC_DEBUG
+extern void _nfs_display_fhandle(const struct nfs_fh *fh);
+#define nfs_display_fhandle(fh) \
+ do { \
+ if (unlikely(nfs_debug & NFSDBG_FACILITY)) \
+ _nfs_display_fhandle(fh); \
+ } while(0)
+#else
+static inline void nfs_display_fhandle(const struct nfs_fh *fh)
+{
+}
+#endif
+
/*
* linux/fs/nfs/nfsroot.c
*/
--
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