cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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inode.h (5391B)


      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 * inode.h
      4 *
      5 * Function prototypes
      6 *
      7 * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
      8 */
      9
     10#ifndef OCFS2_INODE_H
     11#define OCFS2_INODE_H
     12
     13#include "extent_map.h"
     14
     15/* OCFS2 Inode Private Data */
     16struct ocfs2_inode_info
     17{
     18	u64			ip_blkno;
     19
     20	struct ocfs2_lock_res		ip_rw_lockres;
     21	struct ocfs2_lock_res		ip_inode_lockres;
     22	struct ocfs2_lock_res		ip_open_lockres;
     23
     24	/* protects allocation changes on this inode. */
     25	struct rw_semaphore		ip_alloc_sem;
     26
     27	/* protects extended attribute changes on this inode */
     28	struct rw_semaphore		ip_xattr_sem;
     29
     30	/* These fields are protected by ip_lock */
     31	spinlock_t			ip_lock;
     32	u32				ip_open_count;
     33	struct list_head		ip_io_markers;
     34	u32				ip_clusters;
     35
     36	u16				ip_dyn_features;
     37	struct mutex			ip_io_mutex;
     38	u32				ip_flags; /* see below */
     39	u32				ip_attr; /* inode attributes */
     40
     41	/* Record unwritten extents during direct io. */
     42	struct list_head		ip_unwritten_list;
     43
     44	/* protected by recovery_lock. */
     45	struct inode			*ip_next_orphan;
     46
     47	struct ocfs2_caching_info	ip_metadata_cache;
     48	struct ocfs2_extent_map		ip_extent_map;
     49	struct inode			vfs_inode;
     50	struct jbd2_inode		ip_jinode;
     51
     52	u32				ip_dir_start_lookup;
     53
     54	/* Only valid if the inode is the dir. */
     55	u32				ip_last_used_slot;
     56	u64				ip_last_used_group;
     57	u32				ip_dir_lock_gen;
     58
     59	struct ocfs2_alloc_reservation	ip_la_data_resv;
     60
     61	/*
     62	 * Transactions that contain inode's metadata needed to complete
     63	 * fsync and fdatasync, respectively.
     64	 */
     65	tid_t i_sync_tid;
     66	tid_t i_datasync_tid;
     67
     68	struct dquot *i_dquot[MAXQUOTAS];
     69};
     70
     71/*
     72 * Flags for the ip_flags field
     73 */
     74/* System file inodes  */
     75#define OCFS2_INODE_SYSTEM_FILE		0x00000001
     76#define OCFS2_INODE_JOURNAL		0x00000002
     77#define OCFS2_INODE_BITMAP		0x00000004
     78/* This inode has been wiped from disk */
     79#define OCFS2_INODE_DELETED		0x00000008
     80/* Has the inode been orphaned on another node?
     81 *
     82 * This hints to ocfs2_drop_inode that it should clear i_nlink before
     83 * continuing.
     84 *
     85 * We *only* set this on unlink vote from another node. If the inode
     86 * was locally orphaned, then we're sure of the state and don't need
     87 * to twiddle i_nlink later - it's either zero or not depending on
     88 * whether our unlink succeeded. Otherwise we got this from a node
     89 * whose intention was to orphan the inode, however he may have
     90 * crashed, failed etc, so we let ocfs2_drop_inode zero the value and
     91 * rely on ocfs2_delete_inode to sort things out under the proper
     92 * cluster locks.
     93 */
     94#define OCFS2_INODE_MAYBE_ORPHANED	0x00000010
     95/* Does someone have the file open O_DIRECT */
     96#define OCFS2_INODE_OPEN_DIRECT		0x00000020
     97/* Tell the inode wipe code it's not in orphan dir */
     98#define OCFS2_INODE_SKIP_ORPHAN_DIR     0x00000040
     99/* Entry in orphan dir with 'dio-' prefix */
    100#define OCFS2_INODE_DIO_ORPHAN_ENTRY	0x00000080
    101
    102static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode)
    103{
    104	return container_of(inode, struct ocfs2_inode_info, vfs_inode);
    105}
    106
    107#define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL)
    108#define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags |= OCFS2_INODE_JOURNAL)
    109
    110extern const struct address_space_operations ocfs2_aops;
    111extern const struct ocfs2_caching_operations ocfs2_inode_caching_ops;
    112
    113static inline struct ocfs2_caching_info *INODE_CACHE(struct inode *inode)
    114{
    115	return &OCFS2_I(inode)->ip_metadata_cache;
    116}
    117
    118void ocfs2_evict_inode(struct inode *inode);
    119int ocfs2_drop_inode(struct inode *inode);
    120
    121/* Flags for ocfs2_iget() */
    122#define OCFS2_FI_FLAG_SYSFILE		0x1
    123#define OCFS2_FI_FLAG_ORPHAN_RECOVERY	0x2
    124#define OCFS2_FI_FLAG_FILECHECK_CHK	0x4
    125#define OCFS2_FI_FLAG_FILECHECK_FIX	0x8
    126
    127struct inode *ocfs2_ilookup(struct super_block *sb, u64 feoff);
    128struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, unsigned flags,
    129			 int sysfile_type);
    130int ocfs2_inode_revalidate(struct dentry *dentry);
    131void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
    132			  int create_ino);
    133void ocfs2_sync_blockdev(struct super_block *sb);
    134void ocfs2_refresh_inode(struct inode *inode,
    135			 struct ocfs2_dinode *fe);
    136int ocfs2_mark_inode_dirty(handle_t *handle,
    137			   struct inode *inode,
    138			   struct buffer_head *bh);
    139
    140void ocfs2_set_inode_flags(struct inode *inode);
    141void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi);
    142
    143static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode)
    144{
    145	int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9;
    146
    147	return (blkcnt_t)OCFS2_I(inode)->ip_clusters << c_to_s_bits;
    148}
    149
    150/* Validate that a bh contains a valid inode */
    151int ocfs2_validate_inode_block(struct super_block *sb,
    152			       struct buffer_head *bh);
    153/*
    154 * Read an inode block into *bh.  If *bh is NULL, a bh will be allocated.
    155 * This is a cached read.  The inode will be validated with
    156 * ocfs2_validate_inode_block().
    157 */
    158int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh);
    159/* The same, but can be passed OCFS2_BH_* flags */
    160int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
    161				int flags);
    162
    163static inline struct ocfs2_inode_info *cache_info_to_inode(struct ocfs2_caching_info *ci)
    164{
    165	return container_of(ci, struct ocfs2_inode_info, ip_metadata_cache);
    166}
    167
    168/* Does this inode have the reflink flag set? */
    169static inline bool ocfs2_is_refcount_inode(struct inode *inode)
    170{
    171	return (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL);
    172}
    173
    174#endif /* OCFS2_INODE_H */