mirror/freebsd
1
0
Fork 0
mirror of https://git.FreeBSD.org/src.git synced 2025-01-26 16:18:31 +00:00
Code Issues Releases Activity

Avoid deadlock which is caused by locking VDIR of parent and VREG of

Browse Source 
snapshot itself in wrong order.
We can skip unlink check of that directory because it must have
snapshot in it.

Reviewed by:	mckusick and current@
This commit is contained in:
Jun Kuriyama 2004-06-18 14:35:17 +00:00
parent bf4f8992cd
commit 86030e4a00
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=130690
1 changed files with 9 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
sys/ufs/ffs/ffs_snapshot.c
View File

@ -424,6 +424,15 @@ ffs_snapshot(mp, snapfile)
MNT_ILOCK(mp);
continue;
}
/*
* We can skip parent directory vnode because it must have
* this snapshot file in it.
*/
if (xvp == nd.ni_dvp) {
VI_UNLOCK(xvp);
MNT_ILOCK(mp);
continue;
}
if (vn_lock(xvp, LK_EXCLUSIVE | LK_INTERLOCK, td) != 0) {
MNT_ILOCK(mp);
goto loop;