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945ffe54bb
qnx4 wrte support has never been fully implement, is broken since the dawn of time and hasn't been actively developed since before git history started. Instead of letting it further bitrot and complicate API transition (like the new truncate code) remove it. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Anders Larsen <al@alarsen.net> Cc: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
80 lines
1.5 KiB
C
80 lines
1.5 KiB
C
/*
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* QNX4 file system, Linux implementation.
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*
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* Version : 0.2.1
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*
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* Using parts of the xiafs filesystem.
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*
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* History :
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*
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* 28-05-1998 by Richard Frowijn : first release.
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* 20-06-1998 by Frank Denis : basic optimisations.
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* 25-06-1998 by Frank Denis : qnx4_is_free, qnx4_set_bitmap, qnx4_bmap .
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* 28-06-1998 by Frank Denis : qnx4_free_inode (to be fixed) .
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*/
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#include <linux/buffer_head.h>
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#include <linux/bitops.h>
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#include "qnx4.h"
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#if 0
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int qnx4_new_block(struct super_block *sb)
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{
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return 0;
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}
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#endif /* 0 */
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static void count_bits(register const char *bmPart, register int size,
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int *const tf)
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{
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char b;
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int tot = *tf;
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if (size > QNX4_BLOCK_SIZE) {
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size = QNX4_BLOCK_SIZE;
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}
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do {
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b = *bmPart++;
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if ((b & 1) == 0)
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tot++;
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if ((b & 2) == 0)
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tot++;
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if ((b & 4) == 0)
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tot++;
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if ((b & 8) == 0)
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tot++;
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if ((b & 16) == 0)
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tot++;
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if ((b & 32) == 0)
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tot++;
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if ((b & 64) == 0)
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tot++;
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if ((b & 128) == 0)
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tot++;
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size--;
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} while (size != 0);
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*tf = tot;
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}
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unsigned long qnx4_count_free_blocks(struct super_block *sb)
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{
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int start = le32_to_cpu(qnx4_sb(sb)->BitMap->di_first_xtnt.xtnt_blk) - 1;
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int total = 0;
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int total_free = 0;
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int offset = 0;
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int size = le32_to_cpu(qnx4_sb(sb)->BitMap->di_size);
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struct buffer_head *bh;
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while (total < size) {
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if ((bh = sb_bread(sb, start + offset)) == NULL) {
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printk("qnx4: I/O error in counting free blocks\n");
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break;
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}
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count_bits(bh->b_data, size - total, &total_free);
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brelse(bh);
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total += QNX4_BLOCK_SIZE;
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offset++;
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}
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return total_free;
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}
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