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stand: Add dv_devfmt to return a string represenation of the device

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Add a new pointer, dv_devfmt, to allow devices to format themselves. We
will use this to simplify many of the fmtdev functions in the tree as
they are all almost the same, or all are isomorphic to each other.

Sponsored by:		Netflix
Reviewed by:		tsoome (prior version)
Differential Revision:	https://reviews.freebsd.org/D35915
This commit is contained in:
Warner Losh 2022-08-11 09:05:34 -06:00
parent d2d4e1271b
commit 4d4b1a298c
1 changed files with 5 additions and 0 deletions
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5
stand/libsa/stand.h
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@ -140,6 +140,8 @@ extern struct fs_ops efihttp_fsops;
* Device switch
*/
#define DEV_NAMLEN 8 /* Length of name of device class */
#define DEV_DEVLEN 128 /* Length of longest device instance name */
struct devdesc;
struct devsw {
const char dv_name[DEV_NAMLEN];
int dv_type; /* opaque type constant */
@ -157,6 +159,7 @@ struct devsw {
int (*dv_ioctl)(struct open_file *f, u_long cmd, void *data);
int (*dv_print)(int verbose); /* print device information */
void (*dv_cleanup)(void);
char * (*dv_fmtdev)(struct devdesc *);
};
/*
@ -177,6 +180,8 @@ struct devdesc {
void *d_opendata;
};
char *devformat(struct devdesc *d);
struct open_file {
int f_flags; /* see F_* below */
struct devsw *f_dev; /* pointer to device operations */