1 files changed, 0 insertions, 569 deletions

diff --git a/ANDROID_3.4.5/fs/nfs/callback_proc.c b/ANDROID_3.4.5/fs/nfs/callback_proc.c
deleted file mode 100644
index 1b5d809a..00000000
--- a/ANDROID_3.4.5/fs/nfs/callback_proc.c
+++ /dev/null
@@ -1,569 +0,0 @@
-/*
- * linux/fs/nfs/callback_proc.c
- *
- * Copyright (C) 2004 Trond Myklebust
- *
- * NFSv4 callback procedures
- */
-#include <linux/nfs4.h>
-#include <linux/nfs_fs.h>
-#include <linux/slab.h>
-#include <linux/rcupdate.h>
-#include "nfs4_fs.h"
-#include "callback.h"
-#include "delegation.h"
-#include "internal.h"
-#include "pnfs.h"
-
-#ifdef NFS_DEBUG
-#define NFSDBG_FACILITY NFSDBG_CALLBACK
-#endif
-
-__be32 nfs4_callback_getattr(struct cb_getattrargs *args,
-			     struct cb_getattrres *res,
-			     struct cb_process_state *cps)
-{
-	struct nfs_delegation *delegation;
-	struct nfs_inode *nfsi;
-	struct inode *inode;
-
-	res->status = htonl(NFS4ERR_OP_NOT_IN_SESSION);
-	if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */
-		goto out;
-
-	res->bitmap[0] = res->bitmap[1] = 0;
-	res->status = htonl(NFS4ERR_BADHANDLE);
-
-	dprintk_rcu("NFS: GETATTR callback request from %s\n",
-		rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
-
-	inode = nfs_delegation_find_inode(cps->clp, &args->fh);
-	if (inode == NULL)
-		goto out;
-	nfsi = NFS_I(inode);
-	rcu_read_lock();
-	delegation = rcu_dereference(nfsi->delegation);
-	if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0)
-		goto out_iput;
-	res->size = i_size_read(inode);
-	res->change_attr = delegation->change_attr;
-	if (nfsi->npages != 0)
-		res->change_attr++;
-	res->ctime = inode->i_ctime;
-	res->mtime = inode->i_mtime;
-	res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) &
-		args->bitmap[0];
-	res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) &
-		args->bitmap[1];
-	res->status = 0;
-out_iput:
-	rcu_read_unlock();
-	iput(inode);
-out:
-	dprintk("%s: exit with status = %d\n", __func__, ntohl(res->status));
-	return res->status;
-}
-
-__be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy,
-			    struct cb_process_state *cps)
-{
-	struct inode *inode;
-	__be32 res;
-	
-	res = htonl(NFS4ERR_OP_NOT_IN_SESSION);
-	if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */
-		goto out;
-
-	dprintk_rcu("NFS: RECALL callback request from %s\n",
-		rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
-
-	res = htonl(NFS4ERR_BADHANDLE);
-	inode = nfs_delegation_find_inode(cps->clp, &args->fh);
-	if (inode == NULL)
-		goto out;
-	/* Set up a helper thread to actually return the delegation */
-	switch (nfs_async_inode_return_delegation(inode, &args->stateid)) {
-	case 0:
-		res = 0;
-		break;
-	case -ENOENT:
-		res = htonl(NFS4ERR_BAD_STATEID);
-		break;
-	default:
-		res = htonl(NFS4ERR_RESOURCE);
-	}
-	iput(inode);
-out:
-	dprintk("%s: exit with status = %d\n", __func__, ntohl(res));
-	return res;
-}
-
-#if defined(CONFIG_NFS_V4_1)
-
-/*
- * Lookup a layout by filehandle.
- *
- * Note: gets a refcount on the layout hdr and on its respective inode.
- * Caller must put the layout hdr and the inode.
- *
- * TODO: keep track of all layouts (and delegations) in a hash table
- * hashed by filehandle.
- */
-static struct pnfs_layout_hdr * get_layout_by_fh_locked(struct nfs_client *clp, struct nfs_fh *fh)
-{
-	struct nfs_server *server;
-	struct inode *ino;
-	struct pnfs_layout_hdr *lo;
-
-	list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
-		list_for_each_entry(lo, &server->layouts, plh_layouts) {
-			if (nfs_compare_fh(fh, &NFS_I(lo->plh_inode)->fh))
-				continue;
-			ino = igrab(lo->plh_inode);
-			if (!ino)
-				continue;
-			get_layout_hdr(lo);
-			return lo;
-		}
-	}
-
-	return NULL;
-}
-
-static struct pnfs_layout_hdr * get_layout_by_fh(struct nfs_client *clp, struct nfs_fh *fh)
-{
-	struct pnfs_layout_hdr *lo;
-
-	spin_lock(&clp->cl_lock);
-	rcu_read_lock();
-	lo = get_layout_by_fh_locked(clp, fh);
-	rcu_read_unlock();
-	spin_unlock(&clp->cl_lock);
-
-	return lo;
-}
-
-static u32 initiate_file_draining(struct nfs_client *clp,
-				  struct cb_layoutrecallargs *args)
-{
-	struct inode *ino;
-	struct pnfs_layout_hdr *lo;
-	u32 rv = NFS4ERR_NOMATCHING_LAYOUT;
-	LIST_HEAD(free_me_list);
-
-	lo = get_layout_by_fh(clp, &args->cbl_fh);
-	if (!lo)
-		return NFS4ERR_NOMATCHING_LAYOUT;
-
-	ino = lo->plh_inode;
-	spin_lock(&ino->i_lock);
-	if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) ||
-	    mark_matching_lsegs_invalid(lo, &free_me_list,
-					&args->cbl_range))
-		rv = NFS4ERR_DELAY;
-	else
-		rv = NFS4ERR_NOMATCHING_LAYOUT;
-	pnfs_set_layout_stateid(lo, &args->cbl_stateid, true);
-	spin_unlock(&ino->i_lock);
-	pnfs_free_lseg_list(&free_me_list);
-	put_layout_hdr(lo);
-	iput(ino);
-	return rv;
-}
-
-static u32 initiate_bulk_draining(struct nfs_client *clp,
-				  struct cb_layoutrecallargs *args)
-{
-	struct nfs_server *server;
-	struct pnfs_layout_hdr *lo;
-	struct inode *ino;
-	u32 rv = NFS4ERR_NOMATCHING_LAYOUT;
-	struct pnfs_layout_hdr *tmp;
-	LIST_HEAD(recall_list);
-	LIST_HEAD(free_me_list);
-	struct pnfs_layout_range range = {
-		.iomode = IOMODE_ANY,
-		.offset = 0,
-		.length = NFS4_MAX_UINT64,
-	};
-
-	spin_lock(&clp->cl_lock);
-	rcu_read_lock();
-	list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
-		if ((args->cbl_recall_type == RETURN_FSID) &&
-		    memcmp(&server->fsid, &args->cbl_fsid,
-			   sizeof(struct nfs_fsid)))
-			continue;
-
-		list_for_each_entry(lo, &server->layouts, plh_layouts) {
-			if (!igrab(lo->plh_inode))
-				continue;
-			get_layout_hdr(lo);
-			BUG_ON(!list_empty(&lo->plh_bulk_recall));
-			list_add(&lo->plh_bulk_recall, &recall_list);
-		}
-	}
-	rcu_read_unlock();
-	spin_unlock(&clp->cl_lock);
-
-	list_for_each_entry_safe(lo, tmp,
-				 &recall_list, plh_bulk_recall) {
-		ino = lo->plh_inode;
-		spin_lock(&ino->i_lock);
-		set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags);
-		if (mark_matching_lsegs_invalid(lo, &free_me_list, &range))
-			rv = NFS4ERR_DELAY;
-		list_del_init(&lo->plh_bulk_recall);
-		spin_unlock(&ino->i_lock);
-		pnfs_free_lseg_list(&free_me_list);
-		put_layout_hdr(lo);
-		iput(ino);
-	}
-	return rv;
-}
-
-static u32 do_callback_layoutrecall(struct nfs_client *clp,
-				    struct cb_layoutrecallargs *args)
-{
-	u32 res;
-
-	dprintk("%s enter, type=%i\n", __func__, args->cbl_recall_type);
-	if (args->cbl_recall_type == RETURN_FILE)
-		res = initiate_file_draining(clp, args);
-	else
-		res = initiate_bulk_draining(clp, args);
-	dprintk("%s returning %i\n", __func__, res);
-	return res;
-
-}
-
-__be32 nfs4_callback_layoutrecall(struct cb_layoutrecallargs *args,
-				  void *dummy, struct cb_process_state *cps)
-{
-	u32 res;
-
-	dprintk("%s: -->\n", __func__);
-
-	if (cps->clp)
-		res = do_callback_layoutrecall(cps->clp, args);
-	else
-		res = NFS4ERR_OP_NOT_IN_SESSION;
-
-	dprintk("%s: exit with status = %d\n", __func__, res);
-	return cpu_to_be32(res);
-}
-
-static void pnfs_recall_all_layouts(struct nfs_client *clp)
-{
-	struct cb_layoutrecallargs args;
-
-	/* Pretend we got a CB_LAYOUTRECALL(ALL) */
-	memset(&args, 0, sizeof(args));
-	args.cbl_recall_type = RETURN_ALL;
-	/* FIXME we ignore errors, what should we do? */
-	do_callback_layoutrecall(clp, &args);
-}
-
-__be32 nfs4_callback_devicenotify(struct cb_devicenotifyargs *args,
-				  void *dummy, struct cb_process_state *cps)
-{
-	int i;
-	__be32 res = 0;
-	struct nfs_client *clp = cps->clp;
-	struct nfs_server *server = NULL;
-
-	dprintk("%s: -->\n", __func__);
-
-	if (!clp) {
-		res = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION);
-		goto out;
-	}
-
-	for (i = 0; i < args->ndevs; i++) {
-		struct cb_devicenotifyitem *dev = &args->devs[i];
-
-		if (!server ||
-		    server->pnfs_curr_ld->id != dev->cbd_layout_type) {
-			rcu_read_lock();
-			list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link)
-				if (server->pnfs_curr_ld &&
-				    server->pnfs_curr_ld->id == dev->cbd_layout_type) {
-					rcu_read_unlock();
-					goto found;
-				}
-			rcu_read_unlock();
-			dprintk("%s: layout type %u not found\n",
-				__func__, dev->cbd_layout_type);
-			continue;
-		}
-
-	found:
-		if (dev->cbd_notify_type == NOTIFY_DEVICEID4_CHANGE)
-			dprintk("%s: NOTIFY_DEVICEID4_CHANGE not supported, "
-				"deleting instead\n", __func__);
-		nfs4_delete_deviceid(server->pnfs_curr_ld, clp, &dev->cbd_dev_id);
-	}
-
-out:
-	kfree(args->devs);
-	dprintk("%s: exit with status = %u\n",
-		__func__, be32_to_cpu(res));
-	return res;
-}
-
-/*
- * Validate the sequenceID sent by the server.
- * Return success if the sequenceID is one more than what we last saw on
- * this slot, accounting for wraparound.  Increments the slot's sequence.
- *
- * We don't yet implement a duplicate request cache, instead we set the
- * back channel ca_maxresponsesize_cached to zero. This is OK for now
- * since we only currently implement idempotent callbacks anyway.
- *
- * We have a single slot backchannel at this time, so we don't bother
- * checking the used_slots bit array on the table.  The lower layer guarantees
- * a single outstanding callback request at a time.
- */
-static __be32
-validate_seqid(struct nfs4_slot_table *tbl, struct cb_sequenceargs * args)
-{
-	struct nfs4_slot *slot;
-
-	dprintk("%s enter. slotid %d seqid %d\n",
-		__func__, args->csa_slotid, args->csa_sequenceid);
-
-	if (args->csa_slotid >= NFS41_BC_MAX_CALLBACKS)
-		return htonl(NFS4ERR_BADSLOT);
-
-	slot = tbl->slots + args->csa_slotid;
-	dprintk("%s slot table seqid: %d\n", __func__, slot->seq_nr);
-
-	/* Normal */
-	if (likely(args->csa_sequenceid == slot->seq_nr + 1)) {
-		slot->seq_nr++;
-		goto out_ok;
-	}
-
-	/* Replay */
-	if (args->csa_sequenceid == slot->seq_nr) {
-		dprintk("%s seqid %d is a replay\n",
-			__func__, args->csa_sequenceid);
-		/* Signal process_op to set this error on next op */
-		if (args->csa_cachethis == 0)
-			return htonl(NFS4ERR_RETRY_UNCACHED_REP);
-
-		/* The ca_maxresponsesize_cached is 0 with no DRC */
-		else if (args->csa_cachethis == 1)
-			return htonl(NFS4ERR_REP_TOO_BIG_TO_CACHE);
-	}
-
-	/* Wraparound */
-	if (args->csa_sequenceid == 1 && (slot->seq_nr + 1) == 0) {
-		slot->seq_nr = 1;
-		goto out_ok;
-	}
-
-	/* Misordered request */
-	return htonl(NFS4ERR_SEQ_MISORDERED);
-out_ok:
-	tbl->highest_used_slotid = args->csa_slotid;
-	return htonl(NFS4_OK);
-}
-
-/*
- * For each referring call triple, check the session's slot table for
- * a match.  If the slot is in use and the sequence numbers match, the
- * client is still waiting for a response to the original request.
- */
-static bool referring_call_exists(struct nfs_client *clp,
-				  uint32_t nrclists,
-				  struct referring_call_list *rclists)
-{
-	bool status = 0;
-	int i, j;
-	struct nfs4_session *session;
-	struct nfs4_slot_table *tbl;
-	struct referring_call_list *rclist;
-	struct referring_call *ref;
-
-	/*
-	 * XXX When client trunking is implemented, this becomes
-	 * a session lookup from within the loop
-	 */
-	session = clp->cl_session;
-	tbl = &session->fc_slot_table;
-
-	for (i = 0; i < nrclists; i++) {
-		rclist = &rclists[i];
-		if (memcmp(session->sess_id.data,
-			   rclist->rcl_sessionid.data,
-			   NFS4_MAX_SESSIONID_LEN) != 0)
-			continue;
-
-		for (j = 0; j < rclist->rcl_nrefcalls; j++) {
-			ref = &rclist->rcl_refcalls[j];
-
-			dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u "
-				"slotid %u\n", __func__,
-				((u32 *)&rclist->rcl_sessionid.data)[0],
-				((u32 *)&rclist->rcl_sessionid.data)[1],
-				((u32 *)&rclist->rcl_sessionid.data)[2],
-				((u32 *)&rclist->rcl_sessionid.data)[3],
-				ref->rc_sequenceid, ref->rc_slotid);
-
-			spin_lock(&tbl->slot_tbl_lock);
-			status = (test_bit(ref->rc_slotid, tbl->used_slots) &&
-				  tbl->slots[ref->rc_slotid].seq_nr ==
-					ref->rc_sequenceid);
-			spin_unlock(&tbl->slot_tbl_lock);
-			if (status)
-				goto out;
-		}
-	}
-
-out:
-	return status;
-}
-
-__be32 nfs4_callback_sequence(struct cb_sequenceargs *args,
-			      struct cb_sequenceres *res,
-			      struct cb_process_state *cps)
-{
-	struct nfs4_slot_table *tbl;
-	struct nfs_client *clp;
-	int i;
-	__be32 status = htonl(NFS4ERR_BADSESSION);
-
-	clp = nfs4_find_client_sessionid(cps->net, args->csa_addr, &args->csa_sessionid);
-	if (clp == NULL)
-		goto out;
-
-	tbl = &clp->cl_session->bc_slot_table;
-
-	spin_lock(&tbl->slot_tbl_lock);
-	/* state manager is resetting the session */
-	if (test_bit(NFS4_SESSION_DRAINING, &clp->cl_session->session_state)) {
-		spin_unlock(&tbl->slot_tbl_lock);
-		status = htonl(NFS4ERR_DELAY);
-		/* Return NFS4ERR_BADSESSION if we're draining the session
-		 * in order to reset it.
-		 */
-		if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state))
-			status = htonl(NFS4ERR_BADSESSION);
-		goto out;
-	}
-
-	status = validate_seqid(&clp->cl_session->bc_slot_table, args);
-	spin_unlock(&tbl->slot_tbl_lock);
-	if (status)
-		goto out;
-
-	cps->slotid = args->csa_slotid;
-
-	/*
-	 * Check for pending referring calls.  If a match is found, a
-	 * related callback was received before the response to the original
-	 * call.
-	 */
-	if (referring_call_exists(clp, args->csa_nrclists, args->csa_rclists)) {
-		status = htonl(NFS4ERR_DELAY);
-		goto out;
-	}
-
-	memcpy(&res->csr_sessionid, &args->csa_sessionid,
-	       sizeof(res->csr_sessionid));
-	res->csr_sequenceid = args->csa_sequenceid;
-	res->csr_slotid = args->csa_slotid;
-	res->csr_highestslotid = NFS41_BC_MAX_CALLBACKS - 1;
-	res->csr_target_highestslotid = NFS41_BC_MAX_CALLBACKS - 1;
-
-out:
-	cps->clp = clp; /* put in nfs4_callback_compound */
-	for (i = 0; i < args->csa_nrclists; i++)
-		kfree(args->csa_rclists[i].rcl_refcalls);
-	kfree(args->csa_rclists);
-
-	if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) {
-		cps->drc_status = status;
-		status = 0;
-	} else
-		res->csr_status = status;
-
-	dprintk("%s: exit with status = %d res->csr_status %d\n", __func__,
-		ntohl(status), ntohl(res->csr_status));
-	return status;
-}
-
-static bool
-validate_bitmap_values(unsigned long mask)
-{
-	return (mask & ~RCA4_TYPE_MASK_ALL) == 0;
-}
-
-__be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy,
-			       struct cb_process_state *cps)
-{
-	__be32 status;
-	fmode_t flags = 0;
-
-	status = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION);
-	if (!cps->clp) /* set in cb_sequence */
-		goto out;
-
-	dprintk_rcu("NFS: RECALL_ANY callback request from %s\n",
-		rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
-
-	status = cpu_to_be32(NFS4ERR_INVAL);
-	if (!validate_bitmap_values(args->craa_type_mask))
-		goto out;
-
-	status = cpu_to_be32(NFS4_OK);
-	if (test_bit(RCA4_TYPE_MASK_RDATA_DLG, (const unsigned long *)
-		     &args->craa_type_mask))
-		flags = FMODE_READ;
-	if (test_bit(RCA4_TYPE_MASK_WDATA_DLG, (const unsigned long *)
-		     &args->craa_type_mask))
-		flags |= FMODE_WRITE;
-	if (test_bit(RCA4_TYPE_MASK_FILE_LAYOUT, (const unsigned long *)
-		     &args->craa_type_mask))
-		pnfs_recall_all_layouts(cps->clp);
-	if (flags)
-		nfs_expire_all_delegation_types(cps->clp, flags);
-out:
-	dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
-	return status;
-}
-
-/* Reduce the fore channel's max_slots to the target value */
-__be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy,
-				struct cb_process_state *cps)
-{
-	struct nfs4_slot_table *fc_tbl;
-	__be32 status;
-
-	status = htonl(NFS4ERR_OP_NOT_IN_SESSION);
-	if (!cps->clp) /* set in cb_sequence */
-		goto out;
-
-	dprintk_rcu("NFS: CB_RECALL_SLOT request from %s target max slots %d\n",
-		rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR),
-		args->crsa_target_max_slots);
-
-	fc_tbl = &cps->clp->cl_session->fc_slot_table;
-
-	status = htonl(NFS4ERR_BAD_HIGH_SLOT);
-	if (args->crsa_target_max_slots > fc_tbl->max_slots ||
-	    args->crsa_target_max_slots < 1)
-		goto out;
-
-	status = htonl(NFS4_OK);
-	if (args->crsa_target_max_slots == fc_tbl->max_slots)
-		goto out;
-
-	fc_tbl->target_max_slots = args->crsa_target_max_slots;
-	nfs41_handle_recall_slot(cps->clp);
-out:
-	dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
-	return status;
-}
-#endif /* CONFIG_NFS_V4_1 */