Date: Thu, 2 Feb 2017 15:58:30 +0000 From: Steven Hartland <killing@multiplay.co.uk> To: Slawa Olhovchenkov <slw@zxy.spb.ru>, freebsd-fs@freebsd.org Subject: Re: ZFS: mkdir: File too large Message-ID: <dc16880e-17e6-3eb7-b11c-0170bace688c@multiplay.co.uk> In-Reply-To: <20170202142455.GB26493@zxy.spb.ru> References: <20170202115304.GA26493@zxy.spb.ru> <20170202142455.GB26493@zxy.spb.ru>
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On 02/02/2017 14:24, Slawa Olhovchenkov wrote:
>> Try tracing SET_ERROR for EFBIG with dtrace to determine underlying
>> cause.
> 0 37281 none:set-error set-error 27
> zfs.ko`zfs_freebsd_mkdir+0x3a3
> kernel`VOP_MKDIR_APV+0x8a
> kernel`kern_mkdirat+0x1e1
> kernel`amd64_syscall+0x50e
> kernel`0xffffffff8079499b
>
> (kgdb) x zfs_freebsd_mkdir+0x3a3
> 0xffffffff81171813 <zfs_freebsd_mkdir+931>: 0xb4b78b45
> Current language: auto; currently minimal
> (kgdb) info line *0xffffffff81171813
> Line 2145 of "/usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c" starts at address 0xffffffff81171813 <zfs_freebsd_mkdir+931> and ends at 0xffffffff8117181a <zfs_freebsd_mkdir+938>.
>
> 2138 /*
> 2139 * Add a new entry to the directory.
> 2140 */
> 2141 getnewvnode_reserve(1);
> 2142 tx = dmu_tx_create(zfsvfs->z_os);
> 2143 dmu_tx_hold_zap(tx, dzp->z_id, TRUE, dirname);
> 2144 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
> 2145 fuid_dirtied = zfsvfs->z_fuid_dirty;
> 2146 if (fuid_dirtied)
> 2147 zfs_fuid_txhold(zfsvfs, tx);
> 2148 if (!zfsvfs->z_use_sa && acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) {
> 2149 dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0,
> 2150 acl_ids.z_aclp->z_acl_bytes);
> 2151 }
>
> PS: Please, CC me
Having a cursory look I'm going to guess ->
zfs_freebsd_mkdir
dmu_tx_assign
dmu_tx_try_assign
dmu_tx_count_write
if (txh->txh_space_towrite + txh->txh_space_tooverwrite >
2 * DMU_MAX_ACCESS)
err = SET_ERROR(EFBIG);
Regards
Steve
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