函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:block\blk-zoned.c Create Date:2022-07-27 19:41:36
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Helper function to check the validity of zones of a zoned block device.

函数原型：static int blk_revalidate_zone_cb(struct blk_zone *zone, unsigned int idx, void *data)

返回类型：int

参数：

类型参数名称
struct blk_zone *zone
unsigned intidx
void *data
356  args等于data
357  disk等于disk
358  q等于queue
359  capacity等于get_capacity(disk)
365  如果Zone start sector 恒等于0则
366  如果Zone length in number of sectors 恒等于0或非s_power_of_2() - check if a value is a power of two*@n: the value to check* Determine whether some value is a power of two, where zero is* *not* considered a power of two.* Return: true if @n is a power of 2, otherwise false.则
367  打印警告信息("%s: Invalid zoned device with non power of two zone size (%llu)\n", name of major driver , Zone length in number of sectors )
369  返回:负ENODEV
372  zone_sectors等于Zone length in number of sectors
373  nr_zones等于capacity加Zone length in number of sectors 减1右移log2 - log base 2 of 32-bit or a 64-bit unsigned value*@n: parameter* constant-capable log of base 2 calculation* - this can be used to initialise global variables from constant data, hence* the massive ternary operator construction* selects the (Zone length in number of sectors )位
374  否则如果Zone start sector 加zone_sectors小于capacity则
375  如果Zone length in number of sectors 不等于zone_sectors则
376  打印警告信息("%s: Invalid zoned device with non constant zone size\n", name of major driver )
378  返回:负ENODEV
380  否则
381  如果Zone length in number of sectors 大于zone_sectors则
382  打印警告信息("%s: Invalid zoned device with larger last zone size\n", name of major driver )
384  返回:负ENODEV
389  如果Zone start sector 不等于sector则
390  打印警告信息("%s: Zone gap at sectors %llu..%llu\n", name of major driver , sector, Zone start sector )
392  返回:负ENODEV
397  当:Zone type 恒等于BLK_ZONE_TYPE_CONVENTIONAL
398  如果非conv_zones_bitmap则
404  设置内存位
405  退出
406  当:Zone type 恒等于BLK_ZONE_TYPE_SEQWRITE_REQ
407  当:Zone type 恒等于BLK_ZONE_TYPE_SEQWRITE_PREF
408  如果非seq_zones_wlock则
409  seq_zones_wlock等于blk_alloc_zone_bitmap(node, nr_zones)
411  如果非seq_zones_wlock则返回:负ENOMEM
414  退出
415  默认
416  打印警告信息("%s: Invalid zone type 0x%x at sectors %llu\n", name of major driver , (int)Zone type , Zone start sector )
418  返回:负ENODEV
421  sector加等于Zone length in number of sectors
422  返回:0