• David Howells's avatar
    afs: Fix checker warnings · fe342cf7
    David Howells authored
    Fix warnings raised by checker, including:
    
     (*) Warnings raised by unequal comparison for the purposes of sorting,
         where the endianness doesn't matter:
    
    fs/afs/addr_list.c:246:21: warning: restricted __be16 degrades to integer
    fs/afs/addr_list.c:246:30: warning: restricted __be16 degrades to integer
    fs/afs/addr_list.c:248:21: warning: restricted __be32 degrades to integer
    fs/afs/addr_list.c:248:49: warning: restricted __be32 degrades to integer
    fs/afs/addr_list.c:283:21: warning: restricted __be16 degrades to integer
    fs/afs/addr_list.c:283:30: warning: restricted __be16 degrades to integer
    
     (*) afs_set_cb_interest() is not actually used and can be removed.
    
     (*) afs_cell_gc_delay() should be provided with a sysctl.
    
     (*) afs_cell_destroy() needs to use rcu_access_pointer() to read
         cell->vl_addrs.
    
     (*) afs_init_fs_cursor() should be static.
    
     (*) struct afs_vnode::permit_cache needs to be marked __rcu.
    
     (*) afs_server_rcu() needs to use rcu_access_pointer().
    
     (*) afs_destroy_server() should use rcu_access_pointer() on
         server->addresses as the server object is no longer accessible.
    
     (*) afs_find_server() casts __be16/__be32 values to int in order to
         directly compare them for the purpose of finding a match in a list,
         but is should also annotate the cast with __force to avoid checker
         warnings.
    
     (*) afs_check_permit() accesses vnode->permit_cache outside of the RCU
         readlock, though it doesn't then access the value; the extraneous
         access is deleted.
    
    False positives:
    
     (*) Conditional locking around the code in xdr_decode_AFSFetchStatus.  This
         can be dealt with in a separate patch.
    
    fs/afs/fsclient.c:148:9: warning: context imbalance in 'xdr_decode_AFSFetchStatus' - different lock contexts for basic block
    
     (*) Incorrect handling of seq-retry lock context balance:
    
    fs/afs/inode.c:455:38: warning: context imbalance in 'afs_getattr' - different
    lock contexts for basic block
    fs/afs/server.c:52:17: warning: context imbalance in 'afs_find_server' - different lock contexts for basic block
    fs/afs/server.c:128:17: warning: context imbalance in 'afs_find_server_by_uuid' - different lock contexts for basic block
    
    Errors:
    
     (*) afs_lookup_cell_rcu() needs to break out of the seq-retry loop, not go
         round again if it successfully found the workstation cell.
    
     (*) Fix UUID decode in afs_deliver_cb_probe_uuid().
    
     (*) afs_cache_permit() has a missing rcu_read_unlock() before one of the
         jumps to the someone_else_changed_it label.  Move the unlock to after
         the label.
    
     (*) afs_vl_get_addrs_u() is using ntohl() rather than htonl() when
         encoding to XDR.
    
     (*) afs_deliver_yfsvl_get_endpoints() is using htonl() rather than ntohl()
         when decoding from XDR.
    Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
    fe342cf7
callback.c 5.25 KB