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Ignore activation/verify_udev_operations if dm kernel driver vsn < 4.18.

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This commit is contained in:
Alasdair Kergon 2011-07-08 16:49:04 +00:00
parent d8ff1b1efb
commit 1485b6fc93
2 changed files with 23 additions and 0 deletions
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1
WHATS_NEW
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@ -15,6 +15,7 @@ Version 2.02.86 -
Fix to preserve exclusive activation of mirror while up-converting. Fix to preserve exclusive activation of mirror while up-converting.
Reject allocation if number of extents is not divisible by area count. Reject allocation if number of extents is not divisible by area count.
Fix issue preventing cluster mirror creation. Fix issue preventing cluster mirror creation.
Ignore activation/verify_udev_operations if dm kernel driver vsn < 4.18.
Add activation/verify_udev_operations to lvm.conf, disabled by default. Add activation/verify_udev_operations to lvm.conf, disabled by default.
Call vg_mark_partial_lvs() before VG structure is returned from the cache. Call vg_mark_partial_lvs() before VG structure is returned from the cache.
Remove unused internal flag ACTIVATE_EXCL from the code. Remove unused internal flag ACTIVATE_EXCL from the code.

22
lib/commands/toolcontext.c
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@ -200,6 +200,21 @@ static void _init_logging(struct cmd_context *cmd)
reset_lvm_errno(1); reset_lvm_errno(1);
} }
/*
* Until the DM_UEVENT_GENERATED_FLAG was introduced in kernel patch
* 856a6f1dbd8940e72755af145ebcd806408ecedd
* some operations could not be performed by udev, requiring our fallback code.
*/
static int _dm_driver_has_stable_udev_support()
{
char vsn[80];
unsigned maj, min, patchlevel;
return driver_version(vsn, sizeof(vsn)) &&
(sscanf(vsn, "%u.%u.%u", &maj, &min, &patchlevel) == 3) &&
(maj == 4 ? min >= 18 : maj > 4);
}
static int _process_config(struct cmd_context *cmd) static int _process_config(struct cmd_context *cmd)
{ {
mode_t old_umask; mode_t old_umask;
@ -299,6 +314,13 @@ static int _process_config(struct cmd_context *cmd)
find_config_tree_int(cmd, "activation/verify_udev_operations", find_config_tree_int(cmd, "activation/verify_udev_operations",
DEFAULT_VERIFY_UDEV_OPERATIONS) : 1; DEFAULT_VERIFY_UDEV_OPERATIONS) : 1;
/* Do not rely fully on udev if the udev support is known to be incomplete. */
if (!cmd->default_settings.udev_fallback && !_dm_driver_has_stable_udev_support()) {
log_very_verbose("Kernel driver has incomplete udev support so "
"LVM will check and perform some operations itself.");
cmd->default_settings.udev_fallback = 1;
}
#else #else
/* We must use old node/symlink creation code if not compiled with udev support at all! */ /* We must use old node/symlink creation code if not compiled with udev support at all! */
cmd->default_settings.udev_fallback = 1; cmd->default_settings.udev_fallback = 1;