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When performing a VOP_LOOKUP() as part of UFS1 extended attribute

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auto-start, set cnp.cn_lkflags to LK_EXCLUSIVE.  This flag must now
be set so that lockmgr knows what kind of lock to acquire, and it
will panic if not specified.  This resulted in a panic when using
extended attributes on UFS1 as of locking work present in the 6.x
branch.

This is a RELENG_6_0 merge candidate.

Reported by:	lofi
MFC after:	3 days
This commit is contained in:
Robert Watson 2005-10-12 14:18:58 +00:00
parent d528ad8566
commit 606dcf085f
1 changed files with 1 additions and 0 deletions
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1
sys/ufs/ufs/ufs_extattr.c
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@ -251,6 +251,7 @@ ufs_extattr_lookup(struct vnode *start_dvp, int lockparent, char *dirname,
cnp.cn_flags = ISLASTCN;
if (lockparent == UE_GETDIR_LOCKPARENT)
cnp.cn_flags |= LOCKPARENT;
cnp.cn_lkflags = LK_EXCLUSIVE;
cnp.cn_thread = td;
cnp.cn_cred = td->td_ucred;
cnp.cn_pnbuf = uma_zalloc(namei_zone, M_WAITOK);