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8720e9e748
This patch adds a command (-c) option to zpool status and zpool iostat. The
-c option allows you to run an arbitrary command on each vdev and display
the first line of output in zpool status/iostat. The environment vars
VDEV_PATH and VDEV_UPATH are set to the vdev's path and "underlying path"
before running the command. For device mapper, multipath, or partitioned
vdevs, VDEV_UPATH is the actual underlying /dev/sd* disk. This can be useful
if the command you're running requires a /dev/sd* device.
The patch also uses /sys/block/<dev>/slaves/ to lookup the underlying device
instead of using libdevmapper. This not only removes the libdevmapper
requirement at build time, but also allows you to resolve device mapper
devices without being root. This means that UDEV_UPATH get set correctly
when running zpool status/iostat as an unprivileged user.
Example:
$ zpool status -c 'echo I am $VDEV_PATH, $VDEV_UPATH'
NAME STATE READ WRITE CKSUM
mypool ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
mpatha ONLINE 0 0 0 I am /dev/mapper/mpatha, /dev/sdc
sdb ONLINE 0 0 0 I am /dev/sdb1, /dev/sdb
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Closes #5368
101 lines
2.8 KiB
C
101 lines
2.8 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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*/
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#ifndef ZPOOL_UTIL_H
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#define ZPOOL_UTIL_H
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#include <libnvpair.h>
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#include <libzfs.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Basic utility functions
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*/
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void *safe_malloc(size_t);
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void zpool_no_memory(void);
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uint_t num_logs(nvlist_t *nv);
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uint64_t array64_max(uint64_t array[], unsigned int len);
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int isnumber(char *str);
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/*
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* Virtual device functions
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*/
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nvlist_t *make_root_vdev(zpool_handle_t *zhp, nvlist_t *props, int force,
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int check_rep, boolean_t replacing, boolean_t dryrun, int argc,
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char **argv);
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nvlist_t *split_mirror_vdev(zpool_handle_t *zhp, char *newname,
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nvlist_t *props, splitflags_t flags, int argc, char **argv);
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/*
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* Pool list functions
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*/
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int for_each_pool(int, char **, boolean_t unavail, zprop_list_t **,
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zpool_iter_f, void *);
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/* Vdev list functions */
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typedef int (*pool_vdev_iter_f)(zpool_handle_t *, nvlist_t *, void *);
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int for_each_vdev(zpool_handle_t *zhp, pool_vdev_iter_f func, void *data);
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typedef struct zpool_list zpool_list_t;
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zpool_list_t *pool_list_get(int, char **, zprop_list_t **, int *);
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void pool_list_update(zpool_list_t *);
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int pool_list_iter(zpool_list_t *, int unavail, zpool_iter_f, void *);
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void pool_list_free(zpool_list_t *);
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int pool_list_count(zpool_list_t *);
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void pool_list_remove(zpool_list_t *, zpool_handle_t *);
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libzfs_handle_t *g_zfs;
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typedef struct vdev_cmd_data
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{
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char *line; /* cmd output */
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char *path; /* vdev path */
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char *upath; /* vdev underlying path */
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char *pool; /* Pool name */
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char *cmd; /* backpointer to cmd */
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} vdev_cmd_data_t;
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typedef struct vdev_cmd_data_list
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{
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char *cmd; /* Command to run */
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unsigned int count; /* Number of vdev_cmd_data items (vdevs) */
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vdev_cmd_data_t *data; /* Array of vdevs */
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} vdev_cmd_data_list_t;
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vdev_cmd_data_list_t * all_pools_for_each_vdev_run(int argc, char **argv,
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char *cmd);
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void free_vdev_cmd_data_list(vdev_cmd_data_list_t *vcdl);
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#ifdef __cplusplus
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}
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#endif
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#endif /* ZPOOL_UTIL_H */
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