Merge branch 'for-3.7' of git://linux-nfs.org/~bfields/linux

Pull nfsd update from J Bruce Fields:
 "Another relatively quiet cycle.  There was some progress on my
  remaining 4.1 todo's, but a couple of them were just of the form
  "check that we do X correctly", so didn't have much affect on the
  code.

  Other than that, a bunch of cleanup and some bugfixes (including an
  annoying NFSv4.0 state leak and a busy-loop in the server that could
  cause it to peg the CPU without making progress)."

* 'for-3.7' of git://linux-nfs.org/~bfields/linux: (46 commits)
  UAPI: (Scripted) Disintegrate include/linux/sunrpc
  UAPI: (Scripted) Disintegrate include/linux/nfsd
  nfsd4: don't allow reclaims of expired clients
  nfsd4: remove redundant callback probe
  nfsd4: expire old client earlier
  nfsd4: separate session allocation and initialization
  nfsd4: clean up session allocation
  nfsd4: minor free_session cleanup
  nfsd4: new_conn_from_crses should only allocate
  nfsd4: separate connection allocation and initialization
  nfsd4: reject bad forechannel attrs earlier
  nfsd4: enforce per-client sessions/no-sessions distinction
  nfsd4: set cl_minorversion at create time
  nfsd4: don't pin clientids to pseudoflavors
  nfsd4: fix bind_conn_to_session xdr comment
  nfsd4: cast readlink() bug argument
  NFSD: pass null terminated buf to kstrtouint()
  nfsd: remove duplicate init in nfsd4_cb_recall
  nfsd4: eliminate redundant nfs4_free_stateid
  fs/nfsd/nfs4idmap.c: adjust inconsistent IS_ERR and PTR_ERR
  ...

8 files changed, 347 insertions, 0 deletions

diff --git a/include/uapi/linux/nfsd/Kbuild b/include/uapi/linux/nfsd/Kbuild
index aafaa5aa54d4..c11bc404053c 100644
--- a/include/uapi/linux/nfsd/Kbuild
+++ b/include/uapi/linux/nfsd/Kbuild
@@ -1 +1,6 @@
 # UAPI Header export list
+header-y += cld.h
+header-y += debug.h
+header-y += export.h
+header-y += nfsfh.h
+header-y += stats.h
diff --git a/include/uapi/linux/nfsd/cld.h b/include/uapi/linux/nfsd/cld.h
new file mode 100644
index 000000000000..f14a9ab06f1f
--- /dev/null
+++ b/include/uapi/linux/nfsd/cld.h
@@ -0,0 +1,56 @@
+/*
+ * Upcall description for nfsdcld communication
+ *
+ * Copyright (c) 2012 Red Hat, Inc.
+ * Author(s): Jeff Layton <jlayton@redhat.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef _NFSD_CLD_H
+#define _NFSD_CLD_H
+
+/* latest upcall version available */
+#define CLD_UPCALL_VERSION 1
+
+/* defined by RFC3530 */
+#define NFS4_OPAQUE_LIMIT 1024
+
+enum cld_command {
+        Cld_Create,             /* create a record for this cm_id */
+        Cld_Remove,             /* remove record of this cm_id */
+        Cld_Check,              /* is this cm_id allowed? */
+        Cld_GraceDone,          /* grace period is complete */
+};
+
+/* representation of long-form NFSv4 client ID */
+struct cld_name {
+        uint16_t        cn_len;                         /* length of cm_id */
+        unsigned char   cn_id[NFS4_OPAQUE_LIMIT];       /* client-provided */
+} __attribute__((packed));
+
+/* message struct for communication with userspace */
+struct cld_msg {
+        uint8_t         cm_vers;                /* upcall version */
+        uint8_t         cm_cmd;                 /* upcall command */
+        int16_t         cm_status;              /* return code */
+        uint32_t        cm_xid;                 /* transaction id */
+        union {
+                int64_t         cm_gracetime;   /* grace period start time */
+                struct cld_name cm_name;
+        } __attribute__((packed)) cm_u;
+} __attribute__((packed));
+
+#endif /* !_NFSD_CLD_H */
diff --git a/include/uapi/linux/nfsd/debug.h b/include/uapi/linux/nfsd/debug.h
new file mode 100644
index 000000000000..a6f453c740b8
--- /dev/null
+++ b/include/uapi/linux/nfsd/debug.h
@@ -0,0 +1,40 @@
+/*
+ * linux/include/linux/nfsd/debug.h
+ *
+ * Debugging-related stuff for nfsd
+ *
+ * Copyright (C) 1995 Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifndef _UAPILINUX_NFSD_DEBUG_H
+#define _UAPILINUX_NFSD_DEBUG_H
+
+#include <linux/sunrpc/debug.h>
+
+/*
+ * Enable debugging for nfsd.
+ * Requires RPC_DEBUG.
+ */
+#ifdef RPC_DEBUG
+# define NFSD_DEBUG             1
+#endif
+
+/*
+ * knfsd debug flags
+ */
+#define NFSDDBG_SOCK            0x0001
+#define NFSDDBG_FH              0x0002
+#define NFSDDBG_EXPORT          0x0004
+#define NFSDDBG_SVC             0x0008
+#define NFSDDBG_PROC            0x0010
+#define NFSDDBG_FILEOP          0x0020
+#define NFSDDBG_AUTH            0x0040
+#define NFSDDBG_REPCACHE        0x0080
+#define NFSDDBG_XDR             0x0100
+#define NFSDDBG_LOCKD           0x0200
+#define NFSDDBG_ALL             0x7FFF
+#define NFSDDBG_NOCHANGE        0xFFFF
+
+
+
+#endif /* _UAPILINUX_NFSD_DEBUG_H */
diff --git a/include/uapi/linux/nfsd/export.h b/include/uapi/linux/nfsd/export.h
new file mode 100644
index 000000000000..cf47c313794e
--- /dev/null
+++ b/include/uapi/linux/nfsd/export.h
@@ -0,0 +1,58 @@
+/*
+ * include/linux/nfsd/export.h
+ * 
+ * Public declarations for NFS exports. The definitions for the
+ * syscall interface are in nfsctl.h
+ *
+ * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifndef _UAPINFSD_EXPORT_H
+#define _UAPINFSD_EXPORT_H
+
+# include <linux/types.h>
+
+/*
+ * Important limits for the exports stuff.
+ */
+#define NFSCLNT_IDMAX           1024
+#define NFSCLNT_ADDRMAX         16
+#define NFSCLNT_KEYMAX          32
+
+/*
+ * Export flags.
+ */
+#define NFSEXP_READONLY         0x0001
+#define NFSEXP_INSECURE_PORT    0x0002
+#define NFSEXP_ROOTSQUASH       0x0004
+#define NFSEXP_ALLSQUASH        0x0008
+#define NFSEXP_ASYNC            0x0010
+#define NFSEXP_GATHERED_WRITES  0x0020
+/* 40 80 100 currently unused */
+#define NFSEXP_NOHIDE           0x0200
+#define NFSEXP_NOSUBTREECHECK   0x0400
+#define NFSEXP_NOAUTHNLM        0x0800          /* Don't authenticate NLM requests - just trust */
+#define NFSEXP_MSNFS            0x1000  /* do silly things that MS clients expect; no longer supported */
+#define NFSEXP_FSID             0x2000
+#define NFSEXP_CROSSMOUNT       0x4000
+#define NFSEXP_NOACL            0x8000  /* reserved for possible ACL related use */
+/*
+ * The NFSEXP_V4ROOT flag causes the kernel to give access only to NFSv4
+ * clients, and only to the single directory that is the root of the
+ * export; further lookup and readdir operations are treated as if every
+ * subdirectory was a mountpoint, and ignored if they are not themselves
+ * exported.  This is used by nfsd and mountd to construct the NFSv4
+ * pseudofilesystem, which provides access only to paths leading to each
+ * exported filesystem.
+ */
+#define NFSEXP_V4ROOT           0x10000
+/* All flags that we claim to support.  (Note we don't support NOACL.) */
+#define NFSEXP_ALLFLAGS         0x17E3F
+
+/* The flags that may vary depending on security flavor: */
+#define NFSEXP_SECINFO_FLAGS    (NFSEXP_READONLY | NFSEXP_ROOTSQUASH \
+                                        | NFSEXP_ALLSQUASH \
+                                        | NFSEXP_INSECURE_PORT)
+
+
+#endif /* _UAPINFSD_EXPORT_H */
diff --git a/include/uapi/linux/nfsd/nfsfh.h b/include/uapi/linux/nfsd/nfsfh.h
new file mode 100644
index 000000000000..616e3b396476
--- /dev/null
+++ b/include/uapi/linux/nfsd/nfsfh.h
@@ -0,0 +1,122 @@
+/*
+ * include/linux/nfsd/nfsfh.h
+ *
+ * This file describes the layout of the file handles as passed
+ * over the wire.
+ *
+ * Earlier versions of knfsd used to sign file handles using keyed MD5
+ * or SHA. I've removed this code, because it doesn't give you more
+ * security than blocking external access to port 2049 on your firewall.
+ *
+ * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifndef _UAPI_LINUX_NFSD_FH_H
+#define _UAPI_LINUX_NFSD_FH_H
+
+#include <linux/types.h>
+#include <linux/nfs.h>
+#include <linux/nfs2.h>
+#include <linux/nfs3.h>
+#include <linux/nfs4.h>
+
+/*
+ * This is the old "dentry style" Linux NFSv2 file handle.
+ *
+ * The xino and xdev fields are currently used to transport the
+ * ino/dev of the exported inode.
+ */
+struct nfs_fhbase_old {
+        __u32           fb_dcookie;     /* dentry cookie - always 0xfeebbaca */
+        __u32           fb_ino;         /* our inode number */
+        __u32           fb_dirino;      /* dir inode number, 0 for directories */
+        __u32           fb_dev;         /* our device */
+        __u32           fb_xdev;
+        __u32           fb_xino;
+        __u32           fb_generation;
+};
+
+/*
+ * This is the new flexible, extensible style NFSv2/v3 file handle.
+ * by Neil Brown <neilb@cse.unsw.edu.au> - March 2000
+ *
+ * The file handle starts with a sequence of four-byte words.
+ * The first word contains a version number (1) and three descriptor bytes
+ * that tell how the remaining 3 variable length fields should be handled.
+ * These three bytes are auth_type, fsid_type and fileid_type.
+ *
+ * All four-byte values are in host-byte-order.
+ *
+ * The auth_type field specifies how the filehandle can be authenticated
+ * This might allow a file to be confirmed to be in a writable part of a
+ * filetree without checking the path from it up to the root.
+ * Current values:
+ *     0  - No authentication.  fb_auth is 0 bytes long
+ * Possible future values:
+ *     1  - 4 bytes taken from MD5 hash of the remainer of the file handle
+ *          prefixed by a secret and with the important export flags.
+ *
+ * The fsid_type identifies how the filesystem (or export point) is
+ *    encoded.
+ *  Current values:
+ *     0  - 4 byte device id (ms-2-bytes major, ls-2-bytes minor), 4byte inode number
+ *        NOTE: we cannot use the kdev_t device id value, because kdev_t.h
+ *              says we mustn't.  We must break it up and reassemble.
+ *     1  - 4 byte user specified identifier
+ *     2  - 4 byte major, 4 byte minor, 4 byte inode number - DEPRECATED
+ *     3  - 4 byte device id, encoded for user-space, 4 byte inode number
+ *     4  - 4 byte inode number and 4 byte uuid
+ *     5  - 8 byte uuid
+ *     6  - 16 byte uuid
+ *     7  - 8 byte inode number and 16 byte uuid
+ *
+ * The fileid_type identified how the file within the filesystem is encoded.
+ * This is (will be) passed to, and set by, the underlying filesystem if it supports
+ * filehandle operations.  The filesystem must not use the value '0' or '0xff' and may
+ * only use the values 1 and 2 as defined below:
+ *  Current values:
+ *    0   - The root, or export point, of the filesystem.  fb_fileid is 0 bytes.
+ *    1   - 32bit inode number, 32 bit generation number.
+ *    2   - 32bit inode number, 32 bit generation number, 32 bit parent directory inode number.
+ *
+ */
+struct nfs_fhbase_new {
+        __u8            fb_version;     /* == 1, even => nfs_fhbase_old */
+        __u8            fb_auth_type;
+        __u8            fb_fsid_type;
+        __u8            fb_fileid_type;
+        __u32           fb_auth[1];
+/*      __u32           fb_fsid[0]; floating */
+/*      __u32           fb_fileid[0]; floating */
+};
+
+struct knfsd_fh {
+        unsigned int    fh_size;        /* significant for NFSv3.
+                                         * Points to the current size while building
+                                         * a new file handle
+                                         */
+        union {
+                struct nfs_fhbase_old   fh_old;
+                __u32                   fh_pad[NFS4_FHSIZE/4];
+                struct nfs_fhbase_new   fh_new;
+        } fh_base;
+};
+
+#define ofh_dcookie             fh_base.fh_old.fb_dcookie
+#define ofh_ino                 fh_base.fh_old.fb_ino
+#define ofh_dirino              fh_base.fh_old.fb_dirino
+#define ofh_dev                 fh_base.fh_old.fb_dev
+#define ofh_xdev                fh_base.fh_old.fb_xdev
+#define ofh_xino                fh_base.fh_old.fb_xino
+#define ofh_generation          fh_base.fh_old.fb_generation
+
+#define fh_version              fh_base.fh_new.fb_version
+#define fh_fsid_type            fh_base.fh_new.fb_fsid_type
+#define fh_auth_type            fh_base.fh_new.fb_auth_type
+#define fh_fileid_type          fh_base.fh_new.fb_fileid_type
+#define fh_auth                 fh_base.fh_new.fb_auth
+#define fh_fsid                 fh_base.fh_new.fb_auth
+
+
+
+#endif /* _UAPI_LINUX_NFSD_FH_H */
diff --git a/include/uapi/linux/nfsd/stats.h b/include/uapi/linux/nfsd/stats.h
new file mode 100644
index 000000000000..9fb7a0644263
--- /dev/null
+++ b/include/uapi/linux/nfsd/stats.h
@@ -0,0 +1,17 @@
+/*
+ * linux/include/linux/nfsd/stats.h
+ *
+ * Statistics for NFS server.
+ *
+ * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifndef _UAPILINUX_NFSD_STATS_H
+#define _UAPILINUX_NFSD_STATS_H
+
+#include <linux/nfs4.h>
+
+/* thread usage wraps very million seconds (approx one fortnight) */
+#define NFSD_USAGE_WRAP (HZ*1000000)
+
+#endif /* _UAPILINUX_NFSD_STATS_H */
diff --git a/include/uapi/linux/sunrpc/Kbuild b/include/uapi/linux/sunrpc/Kbuild
index aafaa5aa54d4..8e02e47c20fb 100644
--- a/include/uapi/linux/sunrpc/Kbuild
+++ b/include/uapi/linux/sunrpc/Kbuild
@@ -1 +1,2 @@
 # UAPI Header export list
+header-y += debug.h
diff --git a/include/uapi/linux/sunrpc/debug.h b/include/uapi/linux/sunrpc/debug.h
new file mode 100644
index 000000000000..830e34493a8c
--- /dev/null
+++ b/include/uapi/linux/sunrpc/debug.h
@@ -0,0 +1,48 @@
+/*
+ * linux/include/linux/sunrpc/debug.h
+ *
+ * Debugging support for sunrpc module
+ *
+ * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifndef _UAPI_LINUX_SUNRPC_DEBUG_H_
+#define _UAPI_LINUX_SUNRPC_DEBUG_H_
+
+/*
+ * RPC debug facilities
+ */
+#define RPCDBG_XPRT             0x0001
+#define RPCDBG_CALL             0x0002
+#define RPCDBG_DEBUG            0x0004
+#define RPCDBG_NFS              0x0008
+#define RPCDBG_AUTH             0x0010
+#define RPCDBG_BIND             0x0020
+#define RPCDBG_SCHED            0x0040
+#define RPCDBG_TRANS            0x0080
+#define RPCDBG_SVCXPRT          0x0100
+#define RPCDBG_SVCDSP           0x0200
+#define RPCDBG_MISC             0x0400
+#define RPCDBG_CACHE            0x0800
+#define RPCDBG_ALL              0x7fff
+
+
+/*
+ * Declarations for the sysctl debug interface, which allows to read or
+ * change the debug flags for rpc, nfs, nfsd, and lockd. Since the sunrpc
+ * module currently registers its sysctl table dynamically, the sysctl path
+ * for module FOO is <CTL_SUNRPC, CTL_FOODEBUG>.
+ */
+
+enum {
+        CTL_RPCDEBUG = 1,
+        CTL_NFSDEBUG,
+        CTL_NFSDDEBUG,
+        CTL_NLMDEBUG,
+        CTL_SLOTTABLE_UDP,
+        CTL_SLOTTABLE_TCP,
+        CTL_MIN_RESVPORT,
+        CTL_MAX_RESVPORT,
+};
+
+#endif /* _UAPI_LINUX_SUNRPC_DEBUG_H_ */