函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:block\badblocks.c Create Date:2022-07-27 18:59:53
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：adblocks_clear() - Remove a range of bad blocks to the table

函数原型：int badblocks_clear(struct badblocks *bb, sector_t s, int sectors)

返回类型：int

参数：

类型参数名称
struct badblocks *bb
sector_ts
intsectors
335  target等于s加sectors
336  rv等于0
338  如果 shift from sectors to block size * a -ve shift means badblocks are * disabled.大于0则
345  s加等于1左移 shift from sectors to block size * a -ve shift means badblocks are * disabled.位的值减1
346  s右移等于 shift from sectors to block size * a -ve shift means badblocks are * disabled.位
347  target右移等于 shift from sectors to block size * a -ve shift means badblocks are * disabled.位
348  sectors等于target减s
351  write_seqlock_irq( & lock)
353  p等于 badblock list
354  lo等于0
355  hi等于 count of bad blocks
357  当hi减lo大于1循环
358  mid等于lo加hi的和除2
359  a等于BB_OFFSET(p[mid])
361  如果a小于target则lo等于mid
363  否则hi等于mid
366  如果hi大于lo则
371  如果BB_OFFSET(p[lo])加BB_LEN(p[lo])大于target且BB_OFFSET(p[lo])小于target则
374  ack等于BB_ACK(p[lo])
375  a等于BB_OFFSET(p[lo])
376  end等于a加BB_LEN(p[lo])
378  如果a小于s则
389  p[lo]等于BB_MAKE(target, end - target, ack)
391  hi等于lo
392  lo自减
394  当lo大于等于0且BB_OFFSET(p[lo])加BB_LEN(p[lo])大于s且BB_OFFSET(p[lo])小于target循环
398  如果BB_OFFSET(p[lo])小于s则
400  ack等于BB_ACK(p[lo])
401  start等于BB_OFFSET(p[lo])
403  p[lo]等于BB_MAKE(start, s - start, ack)
405  退出
407  lo自减
412  如果hi减lo大于1则
413  memmove(p + lo + 1, p + hi, ( count of bad blocks - hi) * 8)
414  count of bad blocks 减等于hi减lo减1
418  badblocks_update_acked(bb)
419  changed等于1
420  out :
421  write_sequnlock_irq( & lock)
422  返回:rv