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Simplify FreeBSD's locking requirements in zfs_replay.c 

Now that the FreeBSD zfs_vnops code avoids asserting that
a vnode lock is held when z_replay is true we can limit
the FreeBSD specific changes to the couple of changes
where it is necessary to drop the vnode locks because
a function returns with it held.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Matt Macy <mmacy@FreeBSD.org>
Closes #9865
This commit is contained in:
Matthew Macy 2020-01-22 17:55:56 -08:00 committed by Brian Behlendorf
parent e2ef1cbf04
commit 3d91490f7c
1 changed files with 13 additions and 25 deletions
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38
module/zfs/zfs_replay.c
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@ -71,6 +71,9 @@ zfs_init_vattr(vattr_t *vap, uint64_t mask, uint64_t mode,
bzero(vap, sizeof (*vap));
vap->va_mask = (uint_t)mask;
vap->va_mode = mode;
#ifdef __FreeBSD__
vap->va_type = IFTOVT(mode);
#endif
vap->va_uid = (uid_t)(IS_EPHEMERAL(uid)) ? -1 : uid;
vap->va_gid = (gid_t)(IS_EPHEMERAL(gid)) ? -1 : gid;
vap->va_rdev = zfs_cmpldev(rdev);
@ -419,9 +422,12 @@ zfs_replay_create_acl(void *arg1, void *arg2, boolean_t byteswap)
}
bail:
if (error == 0 && zp != NULL)
if (error == 0 && zp != NULL) {
#ifdef __FreeBSD__
VOP_UNLOCK1(ZTOV(zp));
#endif
zrele(zp);
}
zrele(dzp);
if (zfsvfs->z_fuid_replay)
@ -503,9 +509,6 @@ zfs_replay_create(void *arg1, void *arg2, boolean_t byteswap)
lr->lr_uid, lr->lr_gid);
}
#ifdef __FreeBSD__
vn_lock(ZTOV(dzp), LK_EXCLUSIVE | LK_RETRY);
#endif
switch (txtype) {
case TX_CREATE_ATTR:
lrattr = (lr_attr_t *)(caddr_t)(lr + 1);
@ -556,13 +559,13 @@ zfs_replay_create(void *arg1, void *arg2, boolean_t byteswap)
error = SET_ERROR(ENOTSUP);
}
#ifdef __FreeBSD__
VOP_UNLOCK(ZTOV(dzp), 0);
#endif
out:
if (error == 0 && zp != NULL)
if (error == 0 && zp != NULL) {
#ifdef __FreeBSD__
VOP_UNLOCK1(ZTOV(zp));
#endif
zrele(zp);
}
zrele(dzp);
if (zfsvfs->z_fuid_replay)
@ -590,9 +593,6 @@ zfs_replay_remove(void *arg1, void *arg2, boolean_t byteswap)
if (lr->lr_common.lrc_txtype & TX_CI)
vflg |= FIGNORECASE;
#ifdef __FreeBSD__
vn_lock(ZTOV(dzp), LK_EXCLUSIVE | LK_RETRY);
#endif
switch ((int)lr->lr_common.lrc_txtype) {
case TX_REMOVE:
error = zfs_remove(dzp, name, kcred, vflg);
@ -604,9 +604,6 @@ zfs_replay_remove(void *arg1, void *arg2, boolean_t byteswap)
error = SET_ERROR(ENOTSUP);
}
#ifdef __FreeBSD__
VOP_UNLOCK(ZTOV(dzp), 0);
#endif
zrele(dzp);
return (error);
@ -636,15 +633,7 @@ zfs_replay_link(void *arg1, void *arg2, boolean_t byteswap)
if (lr->lr_common.lrc_txtype & TX_CI)
vflg |= FIGNORECASE;
#ifdef __FreeBSD__
vn_lock(ZTOV(dzp), LK_EXCLUSIVE | LK_RETRY);
vn_lock(ZTOV(zp), LK_EXCLUSIVE | LK_RETRY);
#endif
error = zfs_link(dzp, zp, name, kcred, vflg);
#ifdef __FreeBSD__
VOP_UNLOCK(ZTOV(zp), 0);
VOP_UNLOCK(ZTOV(dzp), 0);
#endif
zrele(zp);
zrele(dzp);
@ -680,7 +669,6 @@ zfs_replay_rename(void *arg1, void *arg2, boolean_t byteswap)
zrele(tdzp);
zrele(sdzp);
return (error);
}