read_lba

函数名称：ad_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.

函数原型：static size_t read_lba(struct parsed_partitions *state, u64 lba, u8 *buffer, size_t count)

返回类型：size_t

参数：

类型	参数	名称
struct parsed_partitions *	state
u64	lba
u8 *	buffer
size_t	count

**调用者**
名称	描述
alloc_read_gpt_entries	alloc_read_gpt_entries(): reads partition entries from disk@state: disk parsed partitions@gpt: GPT header* Description: Returns ptes on success, NULL on error
alloc_read_gpt_header	alloc_read_gpt_header(): Allocates GPT header, reads into it from disk@state: disk parsed partitions@lba: the Logical Block Address of the partition table* Description: returns GPT header on success, NULL on error. Allocates
find_valid_gpt	d_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.
alloc_pvd	alloc_pvd(): reads physical volume descriptor@state@lba* Description: Returns pvd on success, NULL on error.* Allocates space for pvd and fill it with disk blocks at @lba* Notes: remember to free pvd when you're done!
alloc_lvn	alloc_lvn(): reads logical volume names@state@lba* Description: Returns lvn on success, NULL on error.* Allocates space for lvn and fill it with disk blocks at @lba* Notes: remember to free lvn when you're done!

函数逻辑报告