/*
 *  linux/fs/sysv/balloc.c
 *
 *  minix/bitmap.c
 *  Copyright (C) 1991, 1992  Linus Torvalds
 *
 *  ext/freelists.c
 *  Copyright (C) 1992  Remy Card (card@masi.ibp.fr)
 *
 *  xenix/alloc.c
 *  Copyright (C) 1992  Doug Evans
 *
 *  coh/alloc.c
 *  Copyright (C) 1993  Pascal Haible, Bruno Haible
 *
 *  sysv/balloc.c
 *  Copyright (C) 1993  Bruno Haible
 *
 *  This file contains code for allocating/freeing blocks.
 */

#include <linux/buffer_head.h>
#include <linux/string.h>
#include "sysv.h"

/* We don't trust the value of
   sb->sv_sbd2->s_tfree = *sb->sv_free_blocks
   but we nevertheless keep it up to date. */

static inline sysv_zone_t *get_chunk(struct super_block *sb, struct buffer_head *bh)
{
	char *bh_data = bh->b_data;

	if (SYSV_SB(sb)->s_type == FSTYPE_SYSV4)
		return (sysv_zone_t*)(bh_data+4);
	else
		return (sysv_zone_t*)(bh_data+2);
}

/* NOTE NOTE NOTE: nr is a block number _as_ _stored_ _on_ _disk_ */

void sysv_free_block(struct super_block * sb, sysv_zone_t nr)
{
	struct sysv_sb_info * sbi = SYSV_SB(sb);
	struct buffer_head * bh;
	sysv_zone_t *blocks = sbi->s_bcache;
	unsigned count;
	unsigned block = fs32_to_cpu(sbi, nr);

	/*
	 * This code does not work at all for AFS (it has a bitmap
	 * free list).  As AFS is supposed to be read-only no one
	 * should call this for an AFS filesystem anyway...
	 */
	if (sbi->s_type == FSTYPE_AFS)
		return;

	if (block < sbi->s_firstdatazone || block >= sbi->s_nzones) {
		printk("sysv_free_block: trying to free block not in datazone\n");
		return;
	}

	mutex_lock(&sbi->s_lock);
	count = fs16_to_cpu(sbi, *sbi->s_bcache_count);

	if (count > sbi->s_flc_size) {
		printk("sysv_free_block: flc_count > flc_size\n");
		mutex_unlock(&sbi->s_lock);
		return;
	}
	/* If the free list head in super-block is full, it is copied
	 * into this block being freed, ditto if it's completely empty
	 * (applies only on Coherent).
	 */
	if (count == sbi->s_flc_size || count == 0) {
		block += sbi->s_block_base;
		bh = sb_getblk(sb, block);
		if (!bh) {
			printk("sysv_free_block: getblk() failed\n");
			mutex_unlock(&sbi->s_lock);
			return;
		}
		memset(bh->b_data, 0, sb->s_blocksize);
		*(__fs16*)bh->b_data = cpu_to_fs16(sbi, count);
		memcpy(get_chunk(sb,bh), blocks, count * sizeof(sysv_zone_t));
		mark_buffer_dirty(bh);
		set_buffer_uptodate(bh);
		brelse(bh);
		count = 0;
	}
	sbi->s_bcache[count++] = nr;

	*sbi->s_bcache_count = cpu_to_fs16(sbi, count);
	fs32_add(sbi, sbi->s_free_blocks, 1);
	dirty_sb(sb);
	mutex_unlock(&sbi->s_lock);
}

sysv_zone_t sysv_new_block(struct super_block * sb)
{
	struct sysv_sb_info *sbi = SYSV_SB(sb);
	unsigned int block;
	sysv_zone_t nr;
	struct buffer_head * bh;
	unsigned count;

	mutex_lock(&sbi->s_lock);
	count = fs16_to_cpu(sbi, *sbi->s_bcache_count);

	if (count == 0) /* Applies only to Coherent FS */
		goto Enospc;
	nr = sbi->s_bcache[--count];
	if (nr == 0)  /* Applies only to Xenix FS, SystemV FS */
		goto Enospc;

	block = fs32_to_cpu(sbi, nr);

	*sbi->s_bcache_count = cpu_to_fs16(sbi, count);

	if (block < sbi->s_firstdatazone || block >= sbi->s_nzones) {
		printk("sysv_new_block: new block %d is not in data zone\n",
			block);
		goto Enospc;
	}

	if (count == 0) { /* the last block continues the free list */
		unsigned count;

		block += sbi->s_block_base;
		if (!(bh = sb_bread(sb, block))) {
			printk("sysv_new_block: cannot read free-list block\n");
			/* retry this same block next time */
			*sbi->s_bcache_count = cpu_to_fs16(sbi, 1);
			goto Enospc;
		}
		count = fs16_to_cpu(sbi, *(__fs16*)bh->b_data);
		if (count > sbi->s_flc_size) {
			printk("sysv_new_block: free-list block with >flc_size entries\n");
			brelse(bh);
			goto Enospc;
		}
		*sbi->s_bcache_count = cpu_to_fs16(sbi, count);
		memcpy(sbi->s_bcache, get_chunk(sb, bh),
				count * sizeof(sysv_zone_t));
		brelse(bh);
	}
	/* Now the free list head in the superblock is valid again. */
	fs32_add(sbi, sbi->s_free_blocks, -1);
	dirty_sb(sb);
	mutex_unlock(&sbi->s_lock);
	return nr;

Enospc:
	mutex_unlock(&sbi->s_lock);
	return 0;
}

unsigned long sysv_count_free_blocks(struct super_block * sb)
{
	struct sysv_sb_info * sbi = SYSV_SB(sb);
	int sb_count;
	int count;
	struct buffer_head * bh = NULL;
	sysv_zone_t *blocks;
	unsigned block;
	int n;

	/*
	 * This code does not work at all for AFS (it has a bitmap
	 * free list).  As AFS is supposed to be read-only we just
	 * lie and say it has no free block at all.
	 */
	if (sbi->s_type == FSTYPE_AFS)
		return 0;

	mutex_lock(&sbi->s_lock);
	sb_count = fs32_to_cpu(sbi, *sbi->s_free_blocks);

	if (0)
		goto trust_sb;

	/* this causes a lot of disk traffic ... */
	count = 0;
	n = fs16_to_cpu(sbi, *sbi->s_bcache_count);
	blocks = sbi->s_bcache;
	while (1) {
		sysv_zone_t zone;
		if (n > sbi->s_flc_size)
			goto E2big;
		zone = 0;
		while (n && (zone = blocks[--n]) != 0)
			count++;
		if (zone == 0)
			break;

		block = fs32_to_cpu(sbi, zone);
		if (bh)
			brelse(bh);

		if (block < sbi->s_firstdatazone || block >= sbi->s_nzones)
			goto Einval;
		block += sbi->s_block_base;
		bh = sb_bread(sb, block);
		if (!bh)
			goto Eio;
		n = fs16_to_cpu(sbi, *(__fs16*)bh->b_data);
		blocks = get_chunk(sb, bh);
	}
	if (bh)
		brelse(bh);
	if (count != sb_count)
		goto Ecount;
done:
	mutex_unlock(&sbi->s_lock);
	return count;

Einval:
	printk("sysv_count_free_blocks: new block %d is not in data zone\n",
		block);
	goto trust_sb;
Eio:
	printk("sysv_count_free_blocks: cannot read free-list block\n");
	goto trust_sb;
E2big:
	printk("sysv_count_free_blocks: >flc_size entries in free-list block\n");
	if (bh)
		brelse(bh);
trust_sb:
	count = sb_count;
	goto done;
Ecount:
	printk("sysv_count_free_blocks: free block count was %d, "
		"correcting to %d\n", sb_count, count);
	if (!(sb->s_flags & MS_RDONLY)) {
		*sbi->s_free_blocks = cpu_to_fs32(sbi, count);
		dirty_sb(sb);
	}
	goto done;
}
?h=nds-private-remove&amp;id=11e3b725cfc282efe9d4a354153e99d86a16af08'>8b5b9e0e1bcae1ab98ee652ffb7b13b05c209bd6</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/soc/samsung/spdif.h?h=nds-private-remove&amp;id=11e3b725cfc282efe9d4a354153e99d86a16af08'>sound/soc/samsung/spdif.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/samsung/spdif.h?h=nds-private-remove&amp;id=d6040764adcb5cb6de1489422411d701c158bb69'>d6040764adcb5cb6de1489422411d701c158bb69</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/soc/samsung/spdif.h?h=nds-private-remove&amp;id=11e3b725cfc282efe9d4a354153e99d86a16af08&amp;id2=d6040764adcb5cb6de1489422411d701c158bb69'>diff</a>)</td></tr></table>
<div class='commit-subject'>crypto: arm64/aes-blk - honour iv_out requirement in CBC and CTR modes</div><div class='commit-msg'>Update the ARMv8 Crypto Extensions and the plain NEON AES implementations
in CBC and CTR modes to return the next IV back to the skcipher API client.
This is necessary for chaining to work correctly.

Note that for CTR, this is only done if the request is a round multiple of
the block size, since otherwise, chaining is impossible anyway.

Cc: &lt;stable@vger.kernel.org&gt; # v3.16+
Signed-off-by: Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;
Signed-off-by: Herbert Xu &lt;herbert@gondor.apana.org.au&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=11e3b725cfc282efe9d4a354153e99d86a16af08'>Diffstat</a> (limited to 'sound/soc/samsung/spdif.h')</div><table summary='diffstat' class='diffstat'>