函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:include\linux\xarray.h Create Date:2022-07-27 06:43:51
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：xas_error() - Return an errno stored in the xa_state.*@xas: XArray operation state.* Return: 0 if no error has been noted. A negative errno if one has.

函数原型：static inline int xas_error(const struct xa_state *xas)

返回类型：int

参数：

类型参数名称
const struct xa_state *xas
1387  返回:xa_err() - Turn an XArray result into an errno
调用者
名称描述
xas_startStarts a walk. If the @xas is already valid, we assume that it's on* the right path and just return where we've got to. If we're in an* error state, return NULL. If the index is outside the current scope
xas_createxas_create() - Create a slot to store an entry in.*@xas: XArray operation state.*@allow_root: %true if we can store the entry in the root directly* Most users will not need to call this function directly, as it is called* by xas_store()
xas_create_rangexas_create_range() - Ensure that stores to this range will succeed*@xas: XArray operation state.* Creates all of the slots in the range covered by @xas. Sets @xas to* create single-index entries and positions it at the beginning of the* range
xas_findxas_find() - Find the next present entry in the XArray
xas_find_markedxas_find_marked() - Find the next marked entry in the XArray.*@xas: XArray operation state.*@max: Highest index to return.*@mark: Mark number to search for.* If the @xas has not yet been walked to an entry, return the marked entry
xas_find_conflictxas_find_conflict() - Find the next present entry in a range.*@xas: XArray operation state.* The @xas describes both a range and a position within that range.* Context: Any context. Expects xa_lock to be held.
xas_result
__xa_insert__xa_insert() - Store this entry in the XArray if no entry is present.*@xa: XArray.*@index: Index into array.*@entry: New entry.*@gfp: Memory allocation flags.* Inserting a NULL entry will store a reserved entry (like xa_reserve())* if no entry is present
xa_store_rangexa_store_range() - Store this entry at a range of indices in the XArray
__xa_alloc
ida_alloc_rangeda_alloc_range() - Allocate an unused ID.*@ida: IDA handle.*@min: Lowest ID to allocate.*@max: Highest ID to allocate.*@gfp: Memory allocation flags.* Allocate an ID between @min and @max, inclusive. The allocated ID will
__check_store_iter
xa_store_many_order
check_create_range_3
check_create_range_4
__add_to_page_cache_locked
add_to_swap_cacheadd_to_swap_cache resembles add_to_page_cache_locked on swapper_space,* but sets SwapCache flag and private instead of mapping and index.
grab_mapping_entryFind page cache entry at given index. If it is a DAX entry, return it* with the entry locked. If the page cache doesn't contain an entry at* that index, add a locked empty entry.* When requesting an entry with size DAX_PMD, grab_mapping_entry() will
__xa_alloc__xa_alloc() - Find somewhere to store this entry in the XArray