函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:block\partitions\efi.c Create Date:2022-07-27 19:06:44
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：last_lba(): return number of last logical block of device*@bdev: block device* Description: Returns last LBA value on success, 0 on error.* This is stored (by sd and ide-geometry) in* the part[0] entry for this disk, and is the number of

函数原型：static u64 last_lba(struct block_device *bdev)

返回类型：u64

参数：

类型参数名称
struct block_device *bdev
136  如果非bdev或非 will die 则返回:0
138  返回:div_u64 - unsigned 64bit divide with 32bit divisor*@dividend: unsigned 64bit dividend*@divisor: unsigned 32bit divisor* This is the most common 64bit divide and should be used if possible,* as many 32bit archs can optimize this variant better than a full 减1ULL
调用者
名称描述
read_lbaad_lba(): Read bytes from disk, starting at given LBA*@state: disk parsed partitions*@lba: the Logical Block Address of the partition table*@buffer: destination buffer*@count: bytes to read* Description: Reads @count bytes from @state->bdev into @buffer.
is_gpt_valids_gpt_valid() - tests one GPT header and PTEs for validity*@state: disk parsed partitions*@lba: logical block address of the GPT header to test*@gpt: GPT header ptr, filled on return.*@ptes: PTEs ptr, filled on return.
find_valid_gptd_valid_gpt() - Search disk for valid GPT headers and PTEs*@state: disk parsed partitions*@gpt: GPT header ptr, filled on return.*@ptes: PTEs ptr, filled on return.* Description: Returns 1 if valid, 0 on error.
efi_partition_partition(struct parsed_partitions *state)*@state: disk parsed partitions* Description: called from check.c, if the disk contains GPT* partitions, sets up partition entries in the kernel.* If the first block on the disk is a legacy MBR,