vdev_root.c File Reference

Virtual device vector for the pool's root vdev. More...

#include <sys/zfs_context.h>
#include <sys/spa.h>
#include <sys/vdev_impl.h>
#include <sys/zio.h>
#include <sys/fs/zfs.h>

Include dependency graph for vdev_root.c:

Go to the source code of this file.

Functions
static int	too_many_errors (vdev_t *vd, int numerrors)
	We should be able to tolerate one failure with absolutely no damage to our metadata.
static int	vdev_root_open (vdev_t *vd, uint64_t *asize, uint64_t *max_asize, uint64_t *ashift)
static void	vdev_root_close (vdev_t *vd)
static void	vdev_root_state_change (vdev_t *vd, int faulted, int degraded)
Variables
vdev_ops_t	vdev_root_ops

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Detailed Description

Virtual device vector for the pool's root vdev.

Definition in file vdev_root.c.

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Function Documentation

static int too_many_errors	(	vdev_t *	vd,
		int	numerrors
	)		[static]

We should be able to tolerate one failure with absolutely no damage to our metadata.

Two failures will take out space maps, a bunch of indirect block trees, meta dnodes, dnodes, etc. Probably not a happy place to live. When we get smarter, we can liberalize this policy. e.g. If we haven't lost two consecutive top-level vdevs, then we are probably fine. Adding bean counters during alloc/free can make this future guesswork more accurate.

Definition at line 51 of file vdev_root.c.

static void vdev_root_close

(

vdev_t *

vd

)

[static]

Definition at line 93 of file vdev_root.c.

static int vdev_root_open	(	vdev_t *	vd,
		uint64_t *	asize,
		uint64_t *	max_asize,
		uint64_t *	ashift
	)		[static]

Definition at line 58 of file vdev_root.c.

static void vdev_root_state_change	(	vdev_t *	vd,
		int	faulted,
		int	degraded
	)		[static]

Definition at line 100 of file vdev_root.c.

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Variable Documentation

vdev_ops_t vdev_root_ops

Initial value:

 {
        vdev_root_open,
        vdev_root_close,
        vdev_default_asize,
        NULL,                   
        NULL,                   
        vdev_root_state_change,
        NULL,
        NULL,
        VDEV_TYPE_ROOT,         
        B_FALSE                 
}

Definition at line 112 of file vdev_root.c.