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Add missing dsl pool configuration lock

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The semantics introduced by the restructured sync task of illumos
3464 require this lock when calling dmu_snapshot_list_next().
The pool is locked/unlocked for each iteration to reduce the
chance of long-running locks.

This was accidentally missed when doing the original port because
ZoL's control directory code is Linux-specific and is in a
different file than in illumos.

Signed-off-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #1785
This commit is contained in:
Tim Chase 2013-10-12 17:33:28 -05:00 committed by Brian Behlendorf
parent 7a61440761
commit fbcb768c8f
1 changed files with 3 additions and 1 deletions
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4
module/zfs/zpl_ctldir.c
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@ -261,8 +261,10 @@ zpl_snapdir_iterate(struct file *filp, struct dir_context *ctx)
goto out;
while (error == 0) {
dsl_pool_config_enter(dmu_objset_pool(zsb->z_os), FTAG);
error = -dmu_snapshot_list_next(zsb->z_os, MAXNAMELEN,
snapname, &id, &(ctx->pos), &case_conflict);
snapname, &id, &ctx->pos, &case_conflict);
dsl_pool_config_exit(dmu_objset_pool(zsb->z_os), FTAG);
if (error)
goto out;