d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

stand: Update comment about devdesc

Browse Source 
How devdesc is used is opaque until much code is read. Give a more
useful description of the theory behind it here.

Sponsored by:		Netflix
This commit is contained in:
Warner Losh 2022-11-04 19:45:27 -06:00
parent 9c231325e7
commit 269865a8ee
1 changed files with 8 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
stand/libsa/stand.h
View File

@ -170,9 +170,14 @@ extern struct devsw netdev;
extern int errno;
/*
* Generic device specifier; architecture-dependent
* versions may be larger, but should be allowed to
* overlap.
* Generic device specifier; architecture-dependent versions may be larger, but
* should be allowed to overlap. The larger device specifiers store more data
* than can fit in the generic one that's gleaned after parsing the device
* string, or used in some cases to indicate wildcards that match a variety of
* situations based on what's on the drive itself rather than what the progammer
* might know in advance. Information about open files is stored in d_opendata,
* though what's passed into the open routine may differ from what's present
* after the open on some configurations.
*/
struct devdesc {
struct devsw *d_dev;