Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 0 insertions, 705 deletions

diff --git a/ANDROID_3.4.5/fs/nfs/delegation.c b/ANDROID_3.4.5/fs/nfs/delegation.c
deleted file mode 100644
index 89af1d26..00000000
--- a/ANDROID_3.4.5/fs/nfs/delegation.c
+++ /dev/null
@@ -1,705 +0,0 @@
-/*
- * linux/fs/nfs/delegation.c
- *
- * Copyright (C) 2004 Trond Myklebust
- *
- * NFS file delegation management
- *
- */
-#include <linux/completion.h>
-#include <linux/kthread.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-
-#include <linux/nfs4.h>
-#include <linux/nfs_fs.h>
-#include <linux/nfs_xdr.h>
-
-#include "nfs4_fs.h"
-#include "delegation.h"
-#include "internal.h"
-
-static void nfs_free_delegation(struct nfs_delegation *delegation)
-{
-	if (delegation->cred) {
-		put_rpccred(delegation->cred);
-		delegation->cred = NULL;
-	}
-	kfree_rcu(delegation, rcu);
-}
-
-/**
- * nfs_mark_delegation_referenced - set delegation's REFERENCED flag
- * @delegation: delegation to process
- *
- */
-void nfs_mark_delegation_referenced(struct nfs_delegation *delegation)
-{
-	set_bit(NFS_DELEGATION_REFERENCED, &delegation->flags);
-}
-
-/**
- * nfs_have_delegation - check if inode has a delegation
- * @inode: inode to check
- * @flags: delegation types to check for
- *
- * Returns one if inode has the indicated delegation, otherwise zero.
- */
-int nfs_have_delegation(struct inode *inode, fmode_t flags)
-{
-	struct nfs_delegation *delegation;
-	int ret = 0;
-
-	flags &= FMODE_READ|FMODE_WRITE;
-	rcu_read_lock();
-	delegation = rcu_dereference(NFS_I(inode)->delegation);
-	if (delegation != NULL && (delegation->type & flags) == flags) {
-		nfs_mark_delegation_referenced(delegation);
-		ret = 1;
-	}
-	rcu_read_unlock();
-	return ret;
-}
-
-static int nfs_delegation_claim_locks(struct nfs_open_context *ctx, struct nfs4_state *state)
-{
-	struct inode *inode = state->inode;
-	struct file_lock *fl;
-	int status = 0;
-
-	if (inode->i_flock == NULL)
-		goto out;
-
-	/* Protect inode->i_flock using the file locks lock */
-	lock_flocks();
-	for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) {
-		if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK)))
-			continue;
-		if (nfs_file_open_context(fl->fl_file) != ctx)
-			continue;
-		unlock_flocks();
-		status = nfs4_lock_delegation_recall(state, fl);
-		if (status < 0)
-			goto out;
-		lock_flocks();
-	}
-	unlock_flocks();
-out:
-	return status;
-}
-
-static int nfs_delegation_claim_opens(struct inode *inode, const nfs4_stateid *stateid)
-{
-	struct nfs_inode *nfsi = NFS_I(inode);
-	struct nfs_open_context *ctx;
-	struct nfs4_state *state;
-	int err;
-
-again:
-	spin_lock(&inode->i_lock);
-	list_for_each_entry(ctx, &nfsi->open_files, list) {
-		state = ctx->state;
-		if (state == NULL)
-			continue;
-		if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
-			continue;
-		if (!nfs4_stateid_match(&state->stateid, stateid))
-			continue;
-		get_nfs_open_context(ctx);
-		spin_unlock(&inode->i_lock);
-		err = nfs4_open_delegation_recall(ctx, state, stateid);
-		if (err >= 0)
-			err = nfs_delegation_claim_locks(ctx, state);
-		put_nfs_open_context(ctx);
-		if (err != 0)
-			return err;
-		goto again;
-	}
-	spin_unlock(&inode->i_lock);
-	return 0;
-}
-
-/**
- * nfs_inode_reclaim_delegation - process a delegation reclaim request
- * @inode: inode to process
- * @cred: credential to use for request
- * @res: new delegation state from server
- *
- */
-void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred,
-				  struct nfs_openres *res)
-{
-	struct nfs_delegation *delegation;
-	struct rpc_cred *oldcred = NULL;
-
-	rcu_read_lock();
-	delegation = rcu_dereference(NFS_I(inode)->delegation);
-	if (delegation != NULL) {
-		spin_lock(&delegation->lock);
-		if (delegation->inode != NULL) {
-			nfs4_stateid_copy(&delegation->stateid, &res->delegation);
-			delegation->type = res->delegation_type;
-			delegation->maxsize = res->maxsize;
-			oldcred = delegation->cred;
-			delegation->cred = get_rpccred(cred);
-			clear_bit(NFS_DELEGATION_NEED_RECLAIM,
-				  &delegation->flags);
-			NFS_I(inode)->delegation_state = delegation->type;
-			spin_unlock(&delegation->lock);
-			put_rpccred(oldcred);
-			rcu_read_unlock();
-		} else {
-			/* We appear to have raced with a delegation return. */
-			spin_unlock(&delegation->lock);
-			rcu_read_unlock();
-			nfs_inode_set_delegation(inode, cred, res);
-		}
-	} else {
-		rcu_read_unlock();
-	}
-}
-
-static int nfs_do_return_delegation(struct inode *inode, struct nfs_delegation *delegation, int issync)
-{
-	int res = 0;
-
-	res = nfs4_proc_delegreturn(inode, delegation->cred, &delegation->stateid, issync);
-	nfs_free_delegation(delegation);
-	return res;
-}
-
-static struct inode *nfs_delegation_grab_inode(struct nfs_delegation *delegation)
-{
-	struct inode *inode = NULL;
-
-	spin_lock(&delegation->lock);
-	if (delegation->inode != NULL)
-		inode = igrab(delegation->inode);
-	spin_unlock(&delegation->lock);
-	return inode;
-}
-
-static struct nfs_delegation *
-nfs_detach_delegation_locked(struct nfs_inode *nfsi,
-			     struct nfs_server *server)
-{
-	struct nfs_delegation *delegation =
-		rcu_dereference_protected(nfsi->delegation,
-				lockdep_is_held(&server->nfs_client->cl_lock));
-
-	if (delegation == NULL)
-		goto nomatch;
-
-	spin_lock(&delegation->lock);
-	list_del_rcu(&delegation->super_list);
-	delegation->inode = NULL;
-	nfsi->delegation_state = 0;
-	rcu_assign_pointer(nfsi->delegation, NULL);
-	spin_unlock(&delegation->lock);
-	return delegation;
-nomatch:
-	return NULL;
-}
-
-static struct nfs_delegation *nfs_detach_delegation(struct nfs_inode *nfsi,
-						    struct nfs_server *server)
-{
-	struct nfs_client *clp = server->nfs_client;
-	struct nfs_delegation *delegation;
-
-	spin_lock(&clp->cl_lock);
-	delegation = nfs_detach_delegation_locked(nfsi, server);
-	spin_unlock(&clp->cl_lock);
-	return delegation;
-}
-
-/**
- * nfs_inode_set_delegation - set up a delegation on an inode
- * @inode: inode to which delegation applies
- * @cred: cred to use for subsequent delegation processing
- * @res: new delegation state from server
- *
- * Returns zero on success, or a negative errno value.
- */
-int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res)
-{
-	struct nfs_server *server = NFS_SERVER(inode);
-	struct nfs_client *clp = server->nfs_client;
-	struct nfs_inode *nfsi = NFS_I(inode);
-	struct nfs_delegation *delegation, *old_delegation;
-	struct nfs_delegation *freeme = NULL;
-	int status = 0;
-
-	delegation = kmalloc(sizeof(*delegation), GFP_NOFS);
-	if (delegation == NULL)
-		return -ENOMEM;
-	nfs4_stateid_copy(&delegation->stateid, &res->delegation);
-	delegation->type = res->delegation_type;
-	delegation->maxsize = res->maxsize;
-	delegation->change_attr = inode->i_version;
-	delegation->cred = get_rpccred(cred);
-	delegation->inode = inode;
-	delegation->flags = 1<<NFS_DELEGATION_REFERENCED;
-	spin_lock_init(&delegation->lock);
-
-	spin_lock(&clp->cl_lock);
-	old_delegation = rcu_dereference_protected(nfsi->delegation,
-					lockdep_is_held(&clp->cl_lock));
-	if (old_delegation != NULL) {
-		if (nfs4_stateid_match(&delegation->stateid,
-					&old_delegation->stateid) &&
-				delegation->type == old_delegation->type) {
-			goto out;
-		}
-		/*
-		 * Deal with broken servers that hand out two
-		 * delegations for the same file.
-		 * Allow for upgrades to a WRITE delegation, but
-		 * nothing else.
-		 */
-		dfprintk(FILE, "%s: server %s handed out "
-				"a duplicate delegation!\n",
-				__func__, clp->cl_hostname);
-		if (delegation->type == old_delegation->type ||
-		    !(delegation->type & FMODE_WRITE)) {
-			freeme = delegation;
-			delegation = NULL;
-			goto out;
-		}
-		freeme = nfs_detach_delegation_locked(nfsi, server);
-	}
-	list_add_rcu(&delegation->super_list, &server->delegations);
-	nfsi->delegation_state = delegation->type;
-	rcu_assign_pointer(nfsi->delegation, delegation);
-	delegation = NULL;
-
-	/* Ensure we revalidate the attributes and page cache! */
-	spin_lock(&inode->i_lock);
-	nfsi->cache_validity |= NFS_INO_REVAL_FORCED;
-	spin_unlock(&inode->i_lock);
-
-out:
-	spin_unlock(&clp->cl_lock);
-	if (delegation != NULL)
-		nfs_free_delegation(delegation);
-	if (freeme != NULL)
-		nfs_do_return_delegation(inode, freeme, 0);
-	return status;
-}
-
-/*
- * Basic procedure for returning a delegation to the server
- */
-static int __nfs_inode_return_delegation(struct inode *inode, struct nfs_delegation *delegation, int issync)
-{
-	struct nfs_inode *nfsi = NFS_I(inode);
-	int err;
-
-	/*
-	 * Guard against new delegated open/lock/unlock calls and against
-	 * state recovery
-	 */
-	down_write(&nfsi->rwsem);
-	err = nfs_delegation_claim_opens(inode, &delegation->stateid);
-	up_write(&nfsi->rwsem);
-	if (err)
-		goto out;
-
-	err = nfs_do_return_delegation(inode, delegation, issync);
-out:
-	return err;
-}
-
-/**
- * nfs_client_return_marked_delegations - return previously marked delegations
- * @clp: nfs_client to process
- *
- * Returns zero on success, or a negative errno value.
- */
-int nfs_client_return_marked_delegations(struct nfs_client *clp)
-{
-	struct nfs_delegation *delegation;
-	struct nfs_server *server;
-	struct inode *inode;
-	int err = 0;
-
-restart:
-	rcu_read_lock();
-	list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
-		list_for_each_entry_rcu(delegation, &server->delegations,
-								super_list) {
-			if (!test_and_clear_bit(NFS_DELEGATION_RETURN,
-							&delegation->flags))
-				continue;
-			inode = nfs_delegation_grab_inode(delegation);
-			if (inode == NULL)
-				continue;
-			delegation = nfs_detach_delegation(NFS_I(inode),
-								server);
-			rcu_read_unlock();
-
-			if (delegation != NULL) {
-				filemap_flush(inode->i_mapping);
-				err = __nfs_inode_return_delegation(inode,
-								delegation, 0);
-			}
-			iput(inode);
-			if (!err)
-				goto restart;
-			set_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state);
-			return err;
-		}
-	}
-	rcu_read_unlock();
-	return 0;
-}
-
-/**
- * nfs_inode_return_delegation_noreclaim - return delegation, don't reclaim opens
- * @inode: inode to process
- *
- * Does not protect against delegation reclaims, therefore really only safe
- * to be called from nfs4_clear_inode().
- */
-void nfs_inode_return_delegation_noreclaim(struct inode *inode)
-{
-	struct nfs_server *server = NFS_SERVER(inode);
-	struct nfs_inode *nfsi = NFS_I(inode);
-	struct nfs_delegation *delegation;
-
-	if (rcu_access_pointer(nfsi->delegation) != NULL) {
-		delegation = nfs_detach_delegation(nfsi, server);
-		if (delegation != NULL)
-			nfs_do_return_delegation(inode, delegation, 0);
-	}
-}
-
-/**
- * nfs_inode_return_delegation - synchronously return a delegation
- * @inode: inode to process
- *
- * Returns zero on success, or a negative errno value.
- */
-int nfs_inode_return_delegation(struct inode *inode)
-{
-	struct nfs_server *server = NFS_SERVER(inode);
-	struct nfs_inode *nfsi = NFS_I(inode);
-	struct nfs_delegation *delegation;
-	int err = 0;
-
-	if (rcu_access_pointer(nfsi->delegation) != NULL) {
-		delegation = nfs_detach_delegation(nfsi, server);
-		if (delegation != NULL) {
-			nfs_wb_all(inode);
-			err = __nfs_inode_return_delegation(inode, delegation, 1);
-		}
-	}
-	return err;
-}
-
-static void nfs_mark_return_delegation(struct nfs_server *server,
-		struct nfs_delegation *delegation)
-{
-	set_bit(NFS_DELEGATION_RETURN, &delegation->flags);
-	set_bit(NFS4CLNT_DELEGRETURN, &server->nfs_client->cl_state);
-}
-
-/**
- * nfs_super_return_all_delegations - return delegations for one superblock
- * @sb: sb to process
- *
- */
-void nfs_super_return_all_delegations(struct super_block *sb)
-{
-	struct nfs_server *server = NFS_SB(sb);
-	struct nfs_client *clp = server->nfs_client;
-	struct nfs_delegation *delegation;
-
-	if (clp == NULL)
-		return;
-
-	rcu_read_lock();
-	list_for_each_entry_rcu(delegation, &server->delegations, super_list) {
-		spin_lock(&delegation->lock);
-		set_bit(NFS_DELEGATION_RETURN, &delegation->flags);
-		spin_unlock(&delegation->lock);
-	}
-	rcu_read_unlock();
-
-	if (nfs_client_return_marked_delegations(clp) != 0)
-		nfs4_schedule_state_manager(clp);
-}
-
-static void nfs_mark_return_all_delegation_types(struct nfs_server *server,
-						 fmode_t flags)
-{
-	struct nfs_delegation *delegation;
-
-	list_for_each_entry_rcu(delegation, &server->delegations, super_list) {
-		if ((delegation->type == (FMODE_READ|FMODE_WRITE)) && !(flags & FMODE_WRITE))
-			continue;
-		if (delegation->type & flags)
-			nfs_mark_return_delegation(server, delegation);
-	}
-}
-
-static void nfs_client_mark_return_all_delegation_types(struct nfs_client *clp,
-							fmode_t flags)
-{
-	struct nfs_server *server;
-
-	rcu_read_lock();
-	list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link)
-		nfs_mark_return_all_delegation_types(server, flags);
-	rcu_read_unlock();
-}
-
-static void nfs_delegation_run_state_manager(struct nfs_client *clp)
-{
-	if (test_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state))
-		nfs4_schedule_state_manager(clp);
-}
-
-void nfs_remove_bad_delegation(struct inode *inode)
-{
-	struct nfs_delegation *delegation;
-
-	delegation = nfs_detach_delegation(NFS_I(inode), NFS_SERVER(inode));
-	if (delegation) {
-		nfs_inode_find_state_and_recover(inode, &delegation->stateid);
-		nfs_free_delegation(delegation);
-	}
-}
-EXPORT_SYMBOL_GPL(nfs_remove_bad_delegation);
-
-/**
- * nfs_expire_all_delegation_types
- * @clp: client to process
- * @flags: delegation types to expire
- *
- */
-void nfs_expire_all_delegation_types(struct nfs_client *clp, fmode_t flags)
-{
-	nfs_client_mark_return_all_delegation_types(clp, flags);
-	nfs_delegation_run_state_manager(clp);
-}
-
-/**
- * nfs_expire_all_delegations
- * @clp: client to process
- *
- */
-void nfs_expire_all_delegations(struct nfs_client *clp)
-{
-	nfs_expire_all_delegation_types(clp, FMODE_READ|FMODE_WRITE);
-}
-
-static void nfs_mark_return_unreferenced_delegations(struct nfs_server *server)
-{
-	struct nfs_delegation *delegation;
-
-	list_for_each_entry_rcu(delegation, &server->delegations, super_list) {
-		if (test_and_clear_bit(NFS_DELEGATION_REFERENCED, &delegation->flags))
-			continue;
-		nfs_mark_return_delegation(server, delegation);
-	}
-}
-
-/**
- * nfs_expire_unreferenced_delegations - Eliminate unused delegations
- * @clp: nfs_client to process
- *
- */
-void nfs_expire_unreferenced_delegations(struct nfs_client *clp)
-{
-	struct nfs_server *server;
-
-	rcu_read_lock();
-	list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link)
-		nfs_mark_return_unreferenced_delegations(server);
-	rcu_read_unlock();
-
-	nfs_delegation_run_state_manager(clp);
-}
-
-/**
- * nfs_async_inode_return_delegation - asynchronously return a delegation
- * @inode: inode to process
- * @stateid: state ID information
- *
- * Returns zero on success, or a negative errno value.
- */
-int nfs_async_inode_return_delegation(struct inode *inode,
-				      const nfs4_stateid *stateid)
-{
-	struct nfs_server *server = NFS_SERVER(inode);
-	struct nfs_client *clp = server->nfs_client;
-	struct nfs_delegation *delegation;
-
-	rcu_read_lock();
-	delegation = rcu_dereference(NFS_I(inode)->delegation);
-
-	if (!clp->cl_mvops->match_stateid(&delegation->stateid, stateid)) {
-		rcu_read_unlock();
-		return -ENOENT;
-	}
-	nfs_mark_return_delegation(server, delegation);
-	rcu_read_unlock();
-
-	nfs_delegation_run_state_manager(clp);
-	return 0;
-}
-
-static struct inode *
-nfs_delegation_find_inode_server(struct nfs_server *server,
-				 const struct nfs_fh *fhandle)
-{
-	struct nfs_delegation *delegation;
-	struct inode *res = NULL;
-
-	list_for_each_entry_rcu(delegation, &server->delegations, super_list) {
-		spin_lock(&delegation->lock);
-		if (delegation->inode != NULL &&
-		    nfs_compare_fh(fhandle, &NFS_I(delegation->inode)->fh) == 0) {
-			res = igrab(delegation->inode);
-		}
-		spin_unlock(&delegation->lock);
-		if (res != NULL)
-			break;
-	}
-	return res;
-}
-
-/**
- * nfs_delegation_find_inode - retrieve the inode associated with a delegation
- * @clp: client state handle
- * @fhandle: filehandle from a delegation recall
- *
- * Returns pointer to inode matching "fhandle," or NULL if a matching inode
- * cannot be found.
- */
-struct inode *nfs_delegation_find_inode(struct nfs_client *clp,
-					const struct nfs_fh *fhandle)
-{
-	struct nfs_server *server;
-	struct inode *res = NULL;
-
-	rcu_read_lock();
-	list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
-		res = nfs_delegation_find_inode_server(server, fhandle);
-		if (res != NULL)
-			break;
-	}
-	rcu_read_unlock();
-	return res;
-}
-
-static void nfs_delegation_mark_reclaim_server(struct nfs_server *server)
-{
-	struct nfs_delegation *delegation;
-
-	list_for_each_entry_rcu(delegation, &server->delegations, super_list)
-		set_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags);
-}
-
-/**
- * nfs_delegation_mark_reclaim - mark all delegations as needing to be reclaimed
- * @clp: nfs_client to process
- *
- */
-void nfs_delegation_mark_reclaim(struct nfs_client *clp)
-{
-	struct nfs_server *server;
-
-	rcu_read_lock();
-	list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link)
-		nfs_delegation_mark_reclaim_server(server);
-	rcu_read_unlock();
-}
-
-/**
- * nfs_delegation_reap_unclaimed - reap unclaimed delegations after reboot recovery is done
- * @clp: nfs_client to process
- *
- */
-void nfs_delegation_reap_unclaimed(struct nfs_client *clp)
-{
-	struct nfs_delegation *delegation;
-	struct nfs_server *server;
-	struct inode *inode;
-
-restart:
-	rcu_read_lock();
-	list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
-		list_for_each_entry_rcu(delegation, &server->delegations,
-								super_list) {
-			if (test_bit(NFS_DELEGATION_NEED_RECLAIM,
-						&delegation->flags) == 0)
-				continue;
-			inode = nfs_delegation_grab_inode(delegation);
-			if (inode == NULL)
-				continue;
-			delegation = nfs_detach_delegation(NFS_I(inode),
-								server);
-			rcu_read_unlock();
-
-			if (delegation != NULL)
-				nfs_free_delegation(delegation);
-			iput(inode);
-			goto restart;
-		}
-	}
-	rcu_read_unlock();
-}
-
-/**
- * nfs_delegations_present - check for existence of delegations
- * @clp: client state handle
- *
- * Returns one if there are any nfs_delegation structures attached
- * to this nfs_client.
- */
-int nfs_delegations_present(struct nfs_client *clp)
-{
-	struct nfs_server *server;
-	int ret = 0;
-
-	rcu_read_lock();
-	list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link)
-		if (!list_empty(&server->delegations)) {
-			ret = 1;
-			break;
-		}
-	rcu_read_unlock();
-	return ret;
-}
-
-/**
- * nfs4_copy_delegation_stateid - Copy inode's state ID information
- * @dst: stateid data structure to fill in
- * @inode: inode to check
- * @flags: delegation type requirement
- *
- * Returns "true" and fills in "dst->data" * if inode had a delegation,
- * otherwise "false" is returned.
- */
-bool nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode,
-		fmode_t flags)
-{
-	struct nfs_inode *nfsi = NFS_I(inode);
-	struct nfs_delegation *delegation;
-	bool ret;
-
-	flags &= FMODE_READ|FMODE_WRITE;
-	rcu_read_lock();
-	delegation = rcu_dereference(nfsi->delegation);
-	ret = (delegation != NULL && (delegation->type & flags) == flags);
-	if (ret) {
-		nfs4_stateid_copy(dst, &delegation->stateid);
-		nfs_mark_delegation_referenced(delegation);
-	}
-	rcu_read_unlock();
-	return ret;
-}