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Raw receive functions must not decrypt data 

This patch fixes a small bug found where receive_spill() sometimes
attempted to decrypt spill blocks when doing a raw receive. In
addition, this patch fixes another small issue in arc_buf_fill()'s
error handling where a decryption failure (which could be caused by
the first bug) would attempt to set the arc header's IO_ERROR flag
without holding the header's lock.

Reviewed-by: Matthew Thode <prometheanfire@gentoo.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Signed-off-by: Tom Caputi <tcaputi@datto.com>
Closes #7564 
Closes #7584 
Closes #7592
This commit is contained in:
Tom Caputi 2018-06-06 13:16:41 -04:00 committed by Brian Behlendorf
parent 6969afcefd
commit e7504d7a18
5 changed files with 23 additions and 6 deletions
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3
include/sys/dmu.h
View File

@ -514,7 +514,8 @@ int dmu_rm_spill(objset_t *, uint64_t, dmu_tx_t *);
* Special spill buffer support used by "SA" framework
*/
int dmu_spill_hold_by_bonus(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp);
int dmu_spill_hold_by_bonus(dmu_buf_t *bonus, uint32_t flags, void *tag,
dmu_buf_t **dbp);
int dmu_spill_hold_by_dnode(dnode_t *dn, uint32_t flags,
void *tag, dmu_buf_t **dbp);
int dmu_spill_hold_existing(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp);

8
module/zfs/arc.c
View File

@ -2144,7 +2144,11 @@ arc_buf_fill(arc_buf_t *buf, spa_t *spa, const zbookmark_phys_t *zb,
error = arc_fill_hdr_crypt(hdr, hash_lock, spa,
zb, !!(flags & ARC_FILL_NOAUTH));
if (error != 0) {
if (hash_lock != NULL)
mutex_enter(hash_lock);
arc_hdr_set_flags(hdr, ARC_FLAG_IO_ERROR);
if (hash_lock != NULL)
mutex_exit(hash_lock);
return (error);
}
}
@ -2247,7 +2251,11 @@ arc_buf_fill(arc_buf_t *buf, spa_t *spa, const zbookmark_phys_t *zb,
"hdr %p, compress %d, psize %d, lsize %d",
hdr, arc_hdr_get_compress(hdr),
HDR_GET_PSIZE(hdr), HDR_GET_LSIZE(hdr));
if (hash_lock != NULL)
mutex_enter(hash_lock);
arc_hdr_set_flags(hdr, ARC_FLAG_IO_ERROR);
if (hash_lock != NULL)
mutex_exit(hash_lock);
return (SET_ERROR(EIO));
}
}

9
module/zfs/dmu.c
View File

@ -459,15 +459,20 @@ dmu_spill_hold_existing(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp)
}
int
dmu_spill_hold_by_bonus(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp)
dmu_spill_hold_by_bonus(dmu_buf_t *bonus, uint32_t flags, void *tag,
dmu_buf_t **dbp)
{
dmu_buf_impl_t *db = (dmu_buf_impl_t *)bonus;
dnode_t *dn;
int err;
uint32_t db_flags = DB_RF_CANFAIL;
if (flags & DMU_READ_NO_DECRYPT)
db_flags |= DB_RF_NO_DECRYPT;
DB_DNODE_ENTER(db);
dn = DB_DNODE(db);
err = dmu_spill_hold_by_dnode(dn, DB_RF_CANFAIL, tag, dbp);
err = dmu_spill_hold_by_dnode(dn, db_flags, tag, dbp);
DB_DNODE_EXIT(db);
return (err);

7
module/zfs/dmu_send.c
View File

@ -2936,6 +2936,7 @@ receive_spill(struct receive_writer_arg *rwa, struct drr_spill *drrs,
dmu_tx_t *tx;
dmu_buf_t *db, *db_spill;
int err;
uint32_t flags = 0;
if (drrs->drr_length < SPA_MINBLOCKSIZE ||
drrs->drr_length > spa_maxblocksize(dmu_objset_spa(rwa->os)))
@ -2946,6 +2947,8 @@ receive_spill(struct receive_writer_arg *rwa, struct drr_spill *drrs,
drrs->drr_compressiontype >= ZIO_COMPRESS_FUNCTIONS ||
drrs->drr_compressed_size == 0)
return (SET_ERROR(EINVAL));
flags |= DMU_READ_NO_DECRYPT;
}
if (dmu_object_info(rwa->os, drrs->drr_object, NULL) != 0)
@ -2955,7 +2958,8 @@ receive_spill(struct receive_writer_arg *rwa, struct drr_spill *drrs,
rwa->max_object = drrs->drr_object;
VERIFY0(dmu_bonus_hold(rwa->os, drrs->drr_object, FTAG, &db));
if ((err = dmu_spill_hold_by_bonus(db, FTAG, &db_spill)) != 0) {
if ((err = dmu_spill_hold_by_bonus(db, DMU_READ_NO_DECRYPT, FTAG,
&db_spill)) != 0) {
dmu_buf_rele(db, FTAG);
return (err);
}
@ -2971,7 +2975,6 @@ receive_spill(struct receive_writer_arg *rwa, struct drr_spill *drrs,
dmu_tx_abort(tx);
return (err);
}
dmu_buf_will_dirty(db_spill, tx);
if (db_spill->db_size < drrs->drr_length)
VERIFY(0 == dbuf_spill_set_blksz(db_spill,

2
module/zfs/sa.c
View File

@ -698,7 +698,7 @@ sa_build_layouts(sa_handle_t *hdl, sa_bulk_attr_t *attr_desc, int attr_count,
boolean_t dummy;
if (hdl->sa_spill == NULL) {
VERIFY(dmu_spill_hold_by_bonus(hdl->sa_bonus, NULL,
VERIFY(dmu_spill_hold_by_bonus(hdl->sa_bonus, 0, NULL,
&hdl->sa_spill) == 0);
}
dmu_buf_will_dirty(hdl->sa_spill, tx);