diff options
| author | Chuck Lever <chuck.lever@oracle.com> | 2012-03-01 17:01:31 -0500 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-03-02 17:18:08 -0500 |
| commit | 20d27e929fb4790a339a4ddcc9a27f14db06055b (patch) | |
| tree | e62d752180c2c7342d801f903c7f2ce2dd952075 | |
| parent | 31b8e2aec099f22d40277c424d8c24b2a4c95fce (diff) | |
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: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| -rw-r--r-- | fs/nfs/inode.c | 45 | ||||
| -rw-r--r-- | include/linux/nfs_fs.h | 14 |
2 files changed, 59 insertions, 0 deletions
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 6c662598f88..99a4f52c14b 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -1046,6 +1046,51 @@ struct nfs_fh *nfs_alloc_fhandle(void) } /** + * _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 * @inode - pointer to inode * @fattr - attributes diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h index 8c29950d2fa..c07a757649d 100644 --- a/include/linux/nfs_fs.h +++ b/include/linux/nfs_fs.h @@ -395,6 +395,20 @@ 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, 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 */ |