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Updates to linux-user-disk 

The major change is removing the thread pool when importing devices.
This may be reintroduced at some point if needed, but it is added
complexity which has already been handled by blkid on modern Linux
systems.  We only need to fallback to probing everything is /dev/
if you config file is toast and even then it only takes a few seconds.
This commit is contained in:
Brian Behlendorf 2010-06-14 15:59:11 -07:00
parent 0c0ea412b3
commit 1b55fad32f
2 changed files with 23 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
cmd/zpool/zpool_main.c
View File

@ -1590,7 +1590,7 @@ do_import(nvlist_t *config, const char *newname, const char *mntopts,
* -c Read pool information from a cachefile instead of searching
* devices.
*
* -d Scan in a specific directory, other than /dev/dsk. More than
* -d Scan in a specific directory, other than /dev/. More than
* one directory can be specified using multiple '-d' options.
*
* -D Scan for previously destroyed pools or import all or only
@ -1749,12 +1749,6 @@ zpool_do_import(int argc, char **argv)
nvlist_add_uint32(policy, ZPOOL_REWIND_REQUEST, rewind_policy) != 0)
goto error;
if (searchdirs == NULL) {
searchdirs = safe_malloc(sizeof (char *));
searchdirs[0] = "/dev/dsk";
nsearch = 1;
}
/* check argument count */
if (do_all) {
if (argc != 0) {

42
lib/libzfs/libzfs_import.c
View File

@ -53,7 +53,6 @@
#include <sys/vtoc.h>
#include <sys/dktp/fdisk.h>
#include <sys/efi_partition.h>
#include <thread_pool.h>
#include <sys/vdev_impl.h>
#ifdef HAVE_LIBBLKID
@ -1004,13 +1003,10 @@ zpool_find_import_impl(libzfs_handle_t *hdl, importargs_t *iarg)
vdev_entry_t *ve, *venext;
config_entry_t *ce, *cenext;
name_entry_t *ne, *nenext;
avl_tree_t slice_cache;
rdsk_node_t *slice;
void *cookie;
verify(poolname == NULL || guid == 0);
verify(iarg->poolname == NULL || iarg->guid == 0);
if (argc == 0) {
if (dirs == 0) {
#ifdef HAVE_LIBBLKID
/* Use libblkid to scan all device for their type */
if (zpool_find_import_blkid(hdl, &pools) == 0)
@ -1020,8 +1016,8 @@ zpool_find_import_impl(libzfs_handle_t *hdl, importargs_t *iarg)
dgettext(TEXT_DOMAIN, "blkid failure falling back "
"to manual probing"));
#endif /* HAVE_LIBBLKID */
argc = 1;
argv = &default_dir;
dirs = 1;
dir = &default_dir;
}
/*
@ -1030,7 +1026,6 @@ zpool_find_import_impl(libzfs_handle_t *hdl, importargs_t *iarg)
* and toplevel GUID.
*/
for (i = 0; i < dirs; i++) {
tpool_t *t;
char *rdsk;
int dfd;
@ -1064,8 +1059,6 @@ zpool_find_import_impl(libzfs_handle_t *hdl, importargs_t *iarg)
goto error;
}
avl_create(&slice_cache, slice_cache_compare,
sizeof (rdsk_node_t), offsetof(rdsk_node_t, rn_node));
/*
* This is not MT-safe, but we have no MT consumers of libzfs
*/
@ -1076,11 +1069,23 @@ zpool_find_import_impl(libzfs_handle_t *hdl, importargs_t *iarg)
continue;
/*
* Do not open /dev/watchdog to stat it because
* it requires a special close or the watchdog
* with be triggered and the system reset.
* Skip checking devices with well known prefixes:
* watchdog - A special close is required to avoid
* triggering it and resetting the system.
* fuse - Fuse control device.
* ppp - Generic PPP driver.
* tty* - Generic serial interface.
* vcs* - Virtual console memory.
* parport* - Parallel port interface.
* lp* - Printer interface.
*/
if (strcmp(name, "watchdog") == 0)
if ((strncmp(name, "watchdog", 8) == 0) ||
(strncmp(name, "fuse", 4) == 0) ||
(strncmp(name, "ppp", 3) == 0) ||
(strncmp(name, "tty", 3) == 0) ||
(strncmp(name, "vcs", 3) == 0) ||
(strncmp(name, "parport", 7) == 0) ||
(strncmp(name, "lp", 2) == 0))
continue;
if ((fd = openat64(dfd, name, O_RDONLY)) < 0)
@ -1129,14 +1134,11 @@ zpool_find_import_impl(libzfs_handle_t *hdl, importargs_t *iarg)
continue;
}
/* use the non-raw path for the config */
(void) strlcpy(end, slice->rn_name, pathleft);
(void) strlcpy(end, name, pathleft);
if (add_config(hdl, &pools, path, config) != 0)
goto error;
}
free(slice->rn_name);
free(slice);
}
avl_destroy(&slice_cache);
(void) closedir(dirp);
dirp = NULL;
@ -1145,7 +1147,7 @@ zpool_find_import_impl(libzfs_handle_t *hdl, importargs_t *iarg)
#ifdef HAVE_LIBBLKID
skip_scanning:
#endif
ret = get_configs(hdl, &pools, active_ok);
ret = get_configs(hdl, &pools, iarg->can_be_active);
error:
for (pe = pools.pools; pe != NULL; pe = penext) {