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Merge tag 'nfs-for-3.10-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Browse Source 
Pull NFS client bugfixes and cleanups from Trond Myklebust:

 - NLM: stable fix for NFSv2/v3 blocking locks

 - NFSv4.x: stable fixes for the delegation recall error handling code

 - NFSv4.x: Security flavour negotiation fixes and cleanups by Chuck
   Lever

 - SUNRPC: A number of RPCSEC_GSS fixes and cleanups also from Chuck

 - NFSv4.x assorted state management and reboot recovery bugfixes

 - NFSv4.1: In cases where we have already looked up a file, and hold a
   valid filehandle, use the new open-by-filehandle operation instead of
   opening by name.

 - Allow the NFSv4.1 callback thread to freeze

 - NFSv4.x: ensure that file unlock waits for readahead to complete

 - NFSv4.1: ensure that the RPC layer doesn't override the NFS session
   table size negotiation by limiting the number of slots.

 - NFSv4.x: Fix SETATTR spec compatibility issues

* tag 'nfs-for-3.10-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (67 commits)
  NFSv4: Warn once about servers that incorrectly apply open mode to setattr
  NFSv4: Servers should only check SETATTR stateid open mode on size change
  NFSv4: Don't recheck permissions on open in case of recovery cached open
  NFSv4.1: Don't do a delegated open for NFS4_OPEN_CLAIM_DELEG_CUR_FH modes
  NFSv4.1: Use the more efficient open_noattr call for open-by-filehandle
  NFS: Retry SETCLIENTID with AUTH_SYS instead of AUTH_NONE
  NFSv4: Ensure that we clear the NFS_OPEN_STATE flag when appropriate
  LOCKD: Ensure that nlmclnt_block resets block->b_status after a server reboot
  NFSv4: Ensure the LOCK call cannot use the delegation stateid
  NFSv4: Use the open stateid if the delegation has the wrong mode
  nfs: Send atime and mtime as a 64bit value
  NFSv4: Record the OPEN create mode used in the nfs4_opendata structure
  NFSv4.1: Set the RPC_CLNT_CREATE_INFINITE_SLOTS flag for NFSv4.1 transports
  SUNRPC: Allow rpc_create() to request that TCP slots be unlimited
  SUNRPC: Fix a livelock problem in the xprt->backlog queue
  NFSv4: Fix handling of revoked delegations by setattr
  NFSv4 release the sequence id in the return on close case
  nfs: remove unnecessary check for NULL inode->i_flock from nfs_delegation_claim_locks
  NFS: Ensure that NFS file unlock waits for readahead to complete
  NFS: Add functionality to allow waiting on all outstanding reads to complete
  ...
This commit is contained in:
Linus Torvalds
2013-04-30 11:28:08 -07:00
parent e72859b87f 721ccfb79b
commit 8728f986fe
41 changed files with 1174 additions and 563 deletions
Download Patch File Download Diff File Expand all files Collapse all files

80
fs/nfs/super.c
View File

@@ -920,7 +920,7 @@ static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void)
data->mount_server.port = NFS_UNSPEC_PORT;
data->nfs_server.port = NFS_UNSPEC_PORT;
data->nfs_server.protocol = XPRT_TRANSPORT_TCP;
data->auth_flavors[0] = RPC_AUTH_UNIX;
data->auth_flavors[0] = RPC_AUTH_MAXFLAVOR;
data->auth_flavor_len = 1;
data->minorversion = 0;
data->need_mount = true;
@@ -1608,49 +1608,57 @@ out_security_failure:
}
/*
* Match the requested auth flavors with the list returned by
* the server. Returns zero and sets the mount's authentication
* flavor on success; returns -EACCES if server does not support
* the requested flavor.
* Select a security flavor for this mount. The selected flavor
* is planted in args->auth_flavors[0].
*/
static int nfs_walk_authlist(struct nfs_parsed_mount_data *args,
struct nfs_mount_request *request)
static void nfs_select_flavor(struct nfs_parsed_mount_data *args,
struct nfs_mount_request *request)
{
unsigned int i, j, server_authlist_len = *(request->auth_flav_len);
unsigned int i, count = *(request->auth_flav_len);
rpc_authflavor_t flavor;
if (args->auth_flavors[0] != RPC_AUTH_MAXFLAVOR)
goto out;
/*
* The NFSv2 MNT operation does not return a flavor list.
*/
if (args->mount_server.version != NFS_MNT3_VERSION)
goto out_default;
/*
* Certain releases of Linux's mountd return an empty
* flavor list. To prevent behavioral regression with
* these servers (ie. rejecting mounts that used to
* succeed), revert to pre-2.6.32 behavior (no checking)
* if the returned flavor list is empty.
* flavor list in some cases.
*/
if (server_authlist_len == 0)
return 0;
if (count == 0)
goto out_default;
/*
* We avoid sophisticated negotiating here, as there are
* plenty of cases where we can get it wrong, providing
* either too little or too much security.
*
* RFC 2623, section 2.7 suggests we SHOULD prefer the
* flavor listed first. However, some servers list
* AUTH_NULL first. Our caller plants AUTH_SYS, the
* preferred default, in args->auth_flavors[0] if user
* didn't specify sec= mount option.
* AUTH_NULL first. Avoid ever choosing AUTH_NULL.
*/
for (i = 0; i < args->auth_flavor_len; i++)
for (j = 0; j < server_authlist_len; j++)
if (args->auth_flavors[i] == request->auth_flavs[j]) {
dfprintk(MOUNT, "NFS: using auth flavor %d\n",
request->auth_flavs[j]);
args->auth_flavors[0] = request->auth_flavs[j];
return 0;
}
for (i = 0; i < count; i++) {
struct rpcsec_gss_info info;
dfprintk(MOUNT, "NFS: server does not support requested auth flavor\n");
nfs_umount(request);
return -EACCES;
flavor = request->auth_flavs[i];
switch (flavor) {
case RPC_AUTH_UNIX:
goto out_set;
case RPC_AUTH_NULL:
continue;
default:
if (rpcauth_get_gssinfo(flavor, &info) == 0)
goto out_set;
}
}
out_default:
flavor = RPC_AUTH_UNIX;
out_set:
args->auth_flavors[0] = flavor;
out:
dfprintk(MOUNT, "NFS: using auth flavor %d\n", args->auth_flavors[0]);
}
/*
@@ -1713,12 +1721,8 @@ static int nfs_request_mount(struct nfs_parsed_mount_data *args,
return status;
}
/*
* MNTv1 (NFSv2) does not support auth flavor negotiation.
*/
if (args->mount_server.version != NFS_MNT3_VERSION)
return 0;
return nfs_walk_authlist(args, &request);
nfs_select_flavor(args, &request);
return 0;
}
struct dentry *nfs_try_mount(int flags, const char *dev_name,