fs/ocfs2/inode.h

Source file repositories/reference/linux-study-clean/fs/ocfs2/inode.h

File Facts

System
Linux kernel
Corpus path
fs/ocfs2/inode.h
Extension
.h
Size
5354 bytes
Lines
174
Domain
Core OS
Bucket
VFS And Filesystem Core
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

#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 __rcu *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 */

Annotation

Implementation Notes