/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* inode.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_INODE_H
#define OCFS2_INODE_H
#include "extent_map.h"
/* OCFS2 Inode Private Data */
struct ocfs2_inode_info
{
u64 ip_blkno;
struct ocfs2_lock_res ip_rw_lockres;
struct ocfs2_lock_res ip_inode_lockres;
struct ocfs2_lock_res ip_open_lockres;
/* protects allocation changes on this inode. */
struct rw_semaphore ip_alloc_sem;
/* protects extended attribute changes on this inode */
struct rw_semaphore ip_xattr_sem;
/* These fields are protected by ip_lock */
spinlock_t ip_lock;
u32 ip_open_count;
struct list_head ip_io_markers;
u32 ip_clusters;
u16 ip_dyn_features;
struct mutex ip_io_mutex;
u32 ip_flags; /* see below */
u32 ip_attr; /* inode attributes */
/* Record unwritten extents during direct io. */
struct list_head ip_unwritten_list;
/* protected by recovery_lock. */
struct inode *ip_next_orphan;
struct ocfs2_caching_info ip_metadata_cache;
struct ocfs2_extent_map ip_extent_map;
struct inode vfs_inode;
struct jbd2_inode ip_jinode;
u32 ip_dir_start_lookup;
/* Only valid if the inode is the dir. */
u32 ip_last_used_slot;
u64 ip_last_used_group;
u32 ip_dir_lock_gen;
struct ocfs2_alloc_reservation ip_la_data_resv;
/*
* Transactions that contain inode's metadata needed to complete
* fsync and fdatasync, respectively.
*/
tid_t i_sync_tid;
tid_t i_datasync_tid;
struct dquot *i_dquot[MAXQUOTAS];
};
/*
* Flags for the ip_flags field
*/
/* System file inodes */
#define OCFS2_INODE_SYSTEM_FILE 0x00000001
#define OCFS2_INODE_JOURNAL 0x00000002
#define OCFS2_INODE_BITMAP 0x00000004
/* This inode has been wiped from disk */
#define OCFS2_INODE_DELETED 0x00000008
/* Has the inode been orphaned on another node?
*
* This hints to ocfs2_drop_inode that it should clear i_nlink before
* continuing.
*
* We *only* set this on unlink vote from another node. If the inode
* was locally orphaned, then we're sure of the state and don't need
* to twiddle i_nlink later - it's either zero or not depending on
* whether our unlink succeeded. Otherwise we got this from a node
* whose intention was to orphan the inode, however he may have
* crashed, failed etc, so we let ocfs2_drop_inode zero the value and
* rely on ocfs2_delete_inode to sort things out under the proper
* cluster locks.
*/
#define OCFS2_INODE_MAYBE_ORPHANED 0x00000010
/* Does someone have the file open O_DIRECT */
#define OCFS2_INODE_OPEN_DIRECT 0x00000020
/* Tell the inode wipe code it's not in orphan dir */
#define OCFS2_INODE_SKIP_ORPHAN_DIR 0x00000040
/* Entry in orphan dir with 'dio-' prefix */
#define OCFS2_INODE_DIO_ORPHAN_ENTRY 0x00000080
static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode)
{
return container_of(inode, struct ocfs2_inode_info, vfs_inode);
}
#define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL)
#define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags |= OCFS2_INODE_JOURNAL)
extern const struct address_space_operations ocfs2_aops;
extern const struct ocfs2_caching_operations ocfs2_inode_caching_ops;
static inline struct ocfs2_caching_info *INODE_CACHE(struct inode *inode)
{
return &OCFS2_I(inode)->ip_metadata_cache;
}
void ocfs2_evict_inode(struct inode *inode);
int ocfs2_drop_inode(struct inode *inode);
/* Flags for ocfs2_iget() */
#define OCFS2_FI_FLAG_SYSFILE 0x1
#define OCFS2_FI_FLAG_ORPHAN_RECOVERY 0x2
#define OCFS2_FI_FLAG_FILECHECK_CHK 0x4
#define OCFS2_FI_FLAG_FILECHECK_FIX 0x8
struct inode *ocfs2_ilookup(struct super_block *sb, u64 feoff);
struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, unsigned flags,
int sysfile_type);
int ocfs2_inode_revalidate(struct dentry *dentry);
void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
int create_ino);
void ocfs2_sync_blockdev(struct super_block *sb);
void ocfs2_refresh_inode(struct inode *inode,
struct ocfs2_dinode *fe);
int ocfs2_mark_inode_dirty(handle_t *handle,
struct inode *inode,
struct buffer_head *bh);
void ocfs2_set_inode_flags(struct inode *inode);
void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi);
static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode)
{
int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9;
return (blkcnt_t)OCFS2_I(inode)->ip_clusters << c_to_s_bits;
}
/* Validate that a bh contains a valid inode */
int ocfs2_validate_inode_block(struct super_block *sb,
struct buffer_head *bh);
/*
* Read an inode block into *bh. If *bh is NULL, a bh will be allocated.
* This is a cached read. The inode will be validated with
* ocfs2_validate_inode_block().
*/
int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh);
/* The same, but can be passed OCFS2_BH_* flags */
int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
int flags);
static inline struct ocfs2_inode_info *cache_info_to_inode(struct ocfs2_caching_info *ci)
{
return container_of(ci, struct ocfs2_inode_info, ip_metadata_cache);
}
/* Does this inode have the reflink flag set? */
static inline bool ocfs2_is_refcount_inode(struct inode *inode)
{
return (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL);
}
#endif /* OCFS2_INODE_H */
private-remove&id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7&id2=0c744ea4f77d72b3dcebb7a8f2684633ec79be88'>diff)
tracing: Fix hwlat kthread migration
The hwlat tracer creates a kernel thread at start of the tracer. It is
pinned to a single CPU and will move to the next CPU after each period of
running. If the user modifies the migration thread's affinity, it will not
change after that happens.
The original code created the thread at the first instance it was called,
but later was changed to destroy the thread after the tracer was finished,
and would not be created until the next instance of the tracer was
established. The code that initialized the affinity was only called on the
initial instantiation of the tracer. After that, it was not initialized, and
the previous affinity did not match the current newly created one, making
it appear that the user modified the thread's affinity when it did not, and
the thread failed to migrate again.
Cc: stable@vger.kernel.org
Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>