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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dqblk_qtree.h (2238B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 *	Definitions of structures and functions for quota formats using trie
      4 */
      5
      6#ifndef _LINUX_DQBLK_QTREE_H
      7#define _LINUX_DQBLK_QTREE_H
      8
      9#include <linux/types.h>
     10
     11/* Numbers of blocks needed for updates - we count with the smallest
     12 * possible block size (1024) */
     13#define QTREE_INIT_ALLOC 4
     14#define QTREE_INIT_REWRITE 2
     15#define QTREE_DEL_ALLOC 0
     16#define QTREE_DEL_REWRITE 6
     17
     18struct dquot;
     19struct kqid;
     20
     21/* Operations */
     22struct qtree_fmt_operations {
     23	void (*mem2disk_dqblk)(void *disk, struct dquot *dquot);	/* Convert given entry from in memory format to disk one */
     24	void (*disk2mem_dqblk)(struct dquot *dquot, void *disk);	/* Convert given entry from disk format to in memory one */
     25	int (*is_id)(void *disk, struct dquot *dquot);	/* Is this structure for given id? */
     26};
     27
     28/* Inmemory copy of version specific information */
     29struct qtree_mem_dqinfo {
     30	struct super_block *dqi_sb;	/* Sb quota is on */
     31	int dqi_type;			/* Quota type */
     32	unsigned int dqi_blocks;	/* # of blocks in quota file */
     33	unsigned int dqi_free_blk;	/* First block in list of free blocks */
     34	unsigned int dqi_free_entry;	/* First block with free entry */
     35	unsigned int dqi_blocksize_bits;	/* Block size of quota file */
     36	unsigned int dqi_entry_size;	/* Size of quota entry in quota file */
     37	unsigned int dqi_usable_bs;	/* Space usable in block for quota data */
     38	unsigned int dqi_qtree_depth;	/* Precomputed depth of quota tree */
     39	const struct qtree_fmt_operations *dqi_ops; /* Operations for entry manipulation */
     40};
     41
     42int qtree_write_dquot(struct qtree_mem_dqinfo *info, struct dquot *dquot);
     43int qtree_read_dquot(struct qtree_mem_dqinfo *info, struct dquot *dquot);
     44int qtree_delete_dquot(struct qtree_mem_dqinfo *info, struct dquot *dquot);
     45int qtree_release_dquot(struct qtree_mem_dqinfo *info, struct dquot *dquot);
     46int qtree_entry_unused(struct qtree_mem_dqinfo *info, char *disk);
     47static inline int qtree_depth(struct qtree_mem_dqinfo *info)
     48{
     49	unsigned int epb = info->dqi_usable_bs >> 2;
     50	unsigned long long entries = epb;
     51	int i;
     52
     53	for (i = 1; entries < (1ULL << 32); i++)
     54		entries *= epb;
     55	return i;
     56}
     57int qtree_get_next_id(struct qtree_mem_dqinfo *info, struct kqid *qid);
     58
     59#endif /* _LINUX_DQBLK_QTREE_H */