/* -*- mode: c; c-basic-offset: 8; -*- * vim: noexpandtab sw=8 ts=8 sts=0: * * dir.h * * Function prototypes * * Copyright (C) 2002, 2004 Oracle. All rights reserved. * * 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., 59 Temple Place - Suite 330, * Boston, MA 021110-1307, USA. */ #ifndef OCFS2_DIR_H #define OCFS2_DIR_H struct ocfs2_dx_hinfo { u32 major_hash; u32 minor_hash; }; struct ocfs2_dir_lookup_result { struct buffer_head *dl_leaf_bh; /* Unindexed leaf * block */ struct ocfs2_dir_entry *dl_entry; /* Target dirent in * unindexed leaf */ struct buffer_head *dl_dx_root_bh; /* Root of indexed * tree */ struct buffer_head *dl_dx_leaf_bh; /* Indexed leaf block */ struct ocfs2_dx_entry *dl_dx_entry; /* Target dx_entry in * indexed leaf */ struct ocfs2_dx_hinfo dl_hinfo; /* Name hash results */ struct buffer_head *dl_prev_leaf_bh;/* Previous entry in * dir free space * list. NULL if * previous entry is * dx root block. */ }; void ocfs2_free_dir_lookup_result(struct ocfs2_dir_lookup_result *res); int ocfs2_find_entry(const char *name, int namelen, struct inode *dir, struct ocfs2_dir_lookup_result *lookup); int ocfs2_delete_entry(handle_t *handle, struct inode *dir, struct ocfs2_dir_lookup_result *res); int __ocfs2_add_entry(handle_t *handle, struct inode *dir, const char *name, int namelen, struct inode *inode, u64 blkno, struct buffer_head *parent_fe_bh, struct ocfs2_dir_lookup_result *lookup); static inline int ocfs2_add_entry(handle_t *handle, struct dentry *dentry, struct inode *inode, u64 blkno, struct buffer_head *parent_fe_bh, struct ocfs2_dir_lookup_result *lookup) { return __ocfs2_add_entry(handle, d_inode(dentry->d_parent), dentry->d_name.name, dentry->d_name.len, inode, blkno, parent_fe_bh, lookup); } int ocfs2_update_entry(struct inode *dir, handle_t *handle, struct ocfs2_dir_lookup_result *res, struct inode *new_entry_inode); int ocfs2_check_dir_for_entry(struct inode *dir, const char *name, int namelen); int ocfs2_empty_dir(struct inode *inode); int ocfs2_find_files_on_disk(const char *name, int namelen, u64 *blkno, struct inode *inode, struct ocfs2_dir_lookup_result *res); int ocfs2_lookup_ino_from_name(struct inode *dir, const char *name, int namelen, u64 *blkno); int ocfs2_readdir(struct file *file, struct dir_context *ctx); int ocfs2_dir_foreach(struct inode *inode, struct dir_context *ctx); int ocfs2_prepare_dir_for_insert(struct ocfs2_super *osb, struct inode *dir, struct buffer_head *parent_fe_bh, const char *name, int namelen, struct ocfs2_dir_lookup_result *lookup); struct ocfs2_alloc_context; int ocfs2_fill_new_dir(struct ocfs2_super *osb, handle_t *handle, struct inode *parent, struct inode *inode, struct buffer_head *fe_bh, struct ocfs2_alloc_context *data_ac, struct ocfs2_alloc_context *meta_ac); int ocfs2_dx_dir_truncate(struct inode *dir, struct buffer_head *di_bh); struct ocfs2_dir_block_trailer *ocfs2_dir_trailer_from_size(int blocksize, void *data); #endif /* OCFS2_DIR_H */ on value='7'>7space:mode:
authorDexuan Cui <decui@microsoft.com>2017-01-28 11:46:02 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-31 10:59:48 +0100
commit433e19cf33d34bb6751c874a9c00980552fe508c (patch)
treece6547ef2987fbb289fa28f03536328a42781651 /net/ipv4/fou.c
parent191e885a2e130e639bb0c8ee350d7047294f2ce6 (diff)
Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()
Commit a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") added the proper mb(), but removed the test "prev_write_sz < pending_sz" when making the signal decision. As a result, the guest can signal the host unnecessarily, and then the host can throttle the guest because the host thinks the guest is buggy or malicious; finally the user running stress test can perceive intermittent freeze of the guest. This patch brings back the test, and properly handles the in-place consumption APIs used by NetVSC (see get_next_pkt_raw(), put_pkt_raw() and commit_rd_index()). Fixes: a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") Signed-off-by: Dexuan Cui <decui@microsoft.com> Reported-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Tested-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: <stable@vger.kernel.org> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/ipv4/fou.c')