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activation: support proper /dev names for component LVs

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When LV is activated AS componet LV - ensure there will
be /dev/vgname/lvname  link present for such LV.
This commit is contained in:
Zdenek Kabelac 2018-02-28 17:22:09 +01:00
parent 112846ce0b
commit eb3597acb3
3 changed files with 14 additions and 6 deletions
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1
lib/activate/activate.c
View File

@ -2677,6 +2677,7 @@ static int _lv_activate(struct cmd_context *cmd, const char *lvid_s,
/* TODO: should not apply for LVs in maintenance mode */
if (!lv_is_visible(lv) && lv_is_component(lv)) {
laopts->read_only = 1;
laopts->component_lv = lv;
} else if (filter)
laopts->read_only = _passes_readonly_filter(cmd, lv);

1
lib/activate/activate.h
View File

@ -83,6 +83,7 @@ struct lv_activate_opts {
* flags are persistent in udev db for any spurious event
* that follows. */
unsigned resuming; /* Set when resuming after a suspend. */
const struct logical_volume *component_lv;
};
void set_activation(int activation, int silent);

18
lib/activate/dev_manager.c
View File

@ -72,6 +72,7 @@ struct dev_manager {
struct lv_layer {
const struct logical_volume *lv;
const char *old_name;
int visible_component;
};
int read_only_lv(const struct logical_volume *lv, const struct lv_activate_opts *laopts)
@ -1590,7 +1591,8 @@ int dev_manager_mknodes(const struct logical_volume *lv)
return_0;
if (dminfo.exists) {
if (_lv_has_mknode(lv))
/* read-only component LV is also made visible */
if (_lv_has_mknode(lv) || (dminfo.read_only && lv_is_component(lv)))
r = _dev_manager_lv_mknodes(lv);
} else
r = _dev_manager_lv_rmnodes(lv);
@ -1652,7 +1654,8 @@ static int _check_udev_fallback(struct cmd_context *cmd)
#endif /* UDEV_SYNC_SUPPORT */
static uint16_t _get_udev_flags(struct dev_manager *dm, const struct logical_volume *lv,
const char *layer, int noscan, int temporary)
const char *layer, int noscan, int temporary,
int visible_component)
{
uint16_t udev_flags = 0;
@ -1668,7 +1671,7 @@ static uint16_t _get_udev_flags(struct dev_manager *dm, const struct logical_vol
* If not, create just the /dev/mapper content.
*/
/* FIXME: add target's method for this */
if (lv_is_new_thin_pool(lv))
if (lv_is_new_thin_pool(lv) || visible_component)
/* New thin-pool is regular LV with -tpool UUID suffix. */
udev_flags |= DM_UDEV_DISABLE_DISK_RULES_FLAG |
DM_UDEV_DISABLE_OTHER_RULES_FLAG;
@ -1866,7 +1869,8 @@ static int _add_dev_to_dtree(struct dev_manager *dm, struct dm_tree *dtree,
}
if (info.exists && !dm_tree_add_dev_with_udev_flags(dtree, info.major, info.minor,
_get_udev_flags(dm, lv, layer, 0, 0))) {
_get_udev_flags(dm, lv, layer,
0, 0, 0))) {
log_error("Failed to add device (%" PRIu32 ":%" PRIu32") to dtree.",
info.major, info.minor);
return 0;
@ -2806,6 +2810,7 @@ static int _add_new_lv_to_dtree(struct dev_manager *dm, struct dm_tree *dtree,
}
lvlayer->lv = lv;
lvlayer->visible_component = (laopts->component_lv == lv) ? 1 : 0;
/*
* Add LV to dtree.
@ -2822,7 +2827,8 @@ static int _add_new_lv_to_dtree(struct dev_manager *dm, struct dm_tree *dtree,
read_only_lv(lv, laopts),
((lv->vg->status & PRECOMMITTED) | laopts->revert) ? 1 : 0,
lvlayer,
_get_udev_flags(dm, lv, layer, laopts->noscan, laopts->temporary))))
_get_udev_flags(dm, lv, layer, laopts->noscan, laopts->temporary,
lvlayer->visible_component))))
return_0;
/* Store existing name so we can do rename later */
@ -2966,7 +2972,7 @@ static int _create_lv_symlinks(struct dev_manager *dm, struct dm_tree_node *root
r = 0;
continue;
}
if (_lv_has_mknode(lvlayer->lv)) {
if (_lv_has_mknode(lvlayer->lv) || lvlayer->visible_component) {
if (!_dev_manager_lv_mknodes(lvlayer->lv))
r = 0;
continue;