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Send / Recv Fixes following b52563 

This patch fixes several issues discovered after
the encryption patch was merged:

* Fixed a bug where encrypted datasets could attempt
  to receive embedded data records.

* Fixed a bug where dirty records created by the recv
  code wasn't properly setting the dr_raw flag.

* Fixed a typo where a dmu_tx_commit() was changed to
  dmu_tx_abort()

* Fixed a few error handling bugs unrelated to the
  encryption patch in dmu_recv_stream()

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tom Caputi <tcaputi@datto.com>
Closes #6512 
Closes #6524 
Closes #6545
This commit is contained in:
Tom Caputi 2017-08-23 19:54:24 -04:00 committed by Brian Behlendorf
parent db4c1adaf8
commit 9b8407638d
6 changed files with 88 additions and 48 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
include/sys/dmu.h
View File

@ -448,8 +448,9 @@ void dmu_object_set_checksum(objset_t *os, uint64_t object, uint8_t checksum,
void dmu_object_set_compress(objset_t *os, uint64_t object, uint8_t compress,
dmu_tx_t *tx);
void
dmu_write_embedded(objset_t *os, uint64_t object, uint64_t offset,
int dmu_object_dirty_raw(objset_t *os, uint64_t object, dmu_tx_t *tx);
void dmu_write_embedded(objset_t *os, uint64_t object, uint64_t offset,
void *data, uint8_t etype, uint8_t comp, int uncompressed_size,
int compressed_size, int byteorder, dmu_tx_t *tx);

16
include/sys/zfs_ioctl.h
View File

@ -164,11 +164,9 @@ typedef enum dmu_send_resume_token_version {
* DRR_WRITE_BYREF, and DRR_OBJECT_RANGE blocks
*/
#define DRR_CHECKSUM_DEDUP (1<<0) /* not used for DRR_SPILL blocks */
#define DRR_RAW_ENCRYPTED (1<<1)
#define DRR_RAW_BYTESWAP (1<<2)
#define DRR_RAW_BYTESWAP (1<<1)
#define DRR_IS_DEDUP_CAPABLE(flags) ((flags) & DRR_CHECKSUM_DEDUP)
#define DRR_IS_RAW_ENCRYPTED(flags) ((flags) & DRR_RAW_ENCRYPTED)
#define DRR_IS_RAW_BYTESWAPPED(flags) ((flags) & DRR_RAW_BYTESWAP)
/* deal with compressed drr_write replay records */
@ -177,11 +175,11 @@ typedef enum dmu_send_resume_token_version {
(DRR_WRITE_COMPRESSED(drrw) ? (drrw)->drr_compressed_size : \
(drrw)->drr_logical_size)
#define DRR_SPILL_PAYLOAD_SIZE(drrs) \
(DRR_IS_RAW_ENCRYPTED(drrs->drr_flags) ? \
((drrs)->drr_compressed_size ? \
(drrs)->drr_compressed_size : (drrs)->drr_length)
#define DRR_OBJECT_PAYLOAD_SIZE(drro) \
(DRR_IS_RAW_ENCRYPTED(drro->drr_flags) ? \
drro->drr_raw_bonuslen : P2ROUNDUP(drro->drr_bonuslen, 8))
((drro)->drr_raw_bonuslen != 0 ? \
(drro)->drr_raw_bonuslen : P2ROUNDUP((drro)->drr_bonuslen, 8))
/*
* zfs ioctl command structure
@ -221,7 +219,7 @@ typedef struct dmu_replay_record {
uint8_t drr_flags;
uint32_t drr_raw_bonuslen;
uint64_t drr_toguid;
/* only nonzero if DRR_RAW_ENCRYPTED flag is set */
/* only nonzero for raw streams */
uint8_t drr_indblkshift;
uint8_t drr_nlevels;
uint8_t drr_nblkptr;
@ -247,7 +245,7 @@ typedef struct dmu_replay_record {
ddt_key_t drr_key;
/* only nonzero if drr_compressiontype is not 0 */
uint64_t drr_compressed_size;
/* only nonzero if DRR_RAW_ENCRYPTED flag is set */
/* only nonzero for raw streams */
uint8_t drr_salt[ZIO_DATA_SALT_LEN];
uint8_t drr_iv[ZIO_DATA_IV_LEN];
uint8_t drr_mac[ZIO_DATA_MAC_LEN];
@ -282,7 +280,7 @@ typedef struct dmu_replay_record {
uint8_t drr_flags;
uint8_t drr_compressiontype;
uint8_t drr_pad[6];
/* only nonzero if DRR_RAW_ENCRYPTED flag is set */
/* only nonzero for raw streams */
uint64_t drr_compressed_size;
uint8_t drr_salt[ZIO_DATA_SALT_LEN];
uint8_t drr_iv[ZIO_DATA_IV_LEN];

6
lib/libzfs/libzfs_sendrecv.c
View File

@ -3735,6 +3735,8 @@ zfs_receive_one(libzfs_handle_t *hdl, int infd, const char *tosnap,
DMU_BACKUP_FEATURE_RESUMING;
boolean_t raw = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo) &
DMU_BACKUP_FEATURE_RAW;
boolean_t embedded = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo) &
DMU_BACKUP_FEATURE_EMBED_DATA;
stream_wantsnewfs = (drrb->drr_fromguid == 0 ||
(drrb->drr_flags & DRR_FLAG_CLONE) || originsnap) && !resuming;
@ -4132,6 +4134,10 @@ zfs_receive_one(libzfs_handle_t *hdl, int infd, const char *tosnap,
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"kernel modules must be upgraded to "
"receive this stream."));
if (embedded && !raw)
zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
"incompatible embedded data stream "
"feature with encrypted receive."));
(void) zfs_error(hdl, EZFS_BADSTREAM, errbuf);
break;
case ECKSUM:

3
man/man8/zfs.8
View File

@ -3338,7 +3338,8 @@ feature enabled.
If the
.Sy lz4_compress
feature is active on the sending system, then the receiving system must have
that feature enabled as well.
that feature enabled as well. Note that streams generated using this flag are
unable to be received into an encrypted dataset.
See
.Xr zpool-features 5
for details on ZFS feature flags and the

19
module/zfs/dmu.c
View File

@ -2016,6 +2016,25 @@ dmu_object_set_compress(objset_t *os, uint64_t object, uint8_t compress,
dnode_rele(dn, FTAG);
}
/*
* Dirty an object and set the dirty record's raw flag. This is used
* when writing raw data to an object that will not effect the
* encryption parameters, specifically during raw receives.
*/
int
dmu_object_dirty_raw(objset_t *os, uint64_t object, dmu_tx_t *tx)
{
dnode_t *dn;
int err;
err = dnode_hold(os, object, FTAG, &dn);
if (err)
return (err);
dmu_buf_will_change_crypt_params((dmu_buf_t *)dn->dn_dbuf, tx);
dnode_rele(dn, FTAG);
return (err);
}
int zfs_mdcomp_disable = 0;
/*

87
module/zfs/dmu_send.c
View File

@ -327,12 +327,11 @@ dump_write(dmu_sendarg_t *dsp, dmu_object_type_t type, uint64_t object,
ASSERT(BP_IS_PROTECTED(bp));
/*
* This is a raw protected block so we set the encrypted
* flag. We need to pass along everything the receiving
* side will need to interpret this block, including the
* byteswap, salt, IV, and MAC.
* This is a raw protected block so we need to pass
* along everything the receiving side will need to
* interpret this block, including the byteswap, salt,
* IV, and MAC.
*/
drrw->drr_flags |= DRR_RAW_ENCRYPTED;
if (BP_SHOULD_BYTESWAP(bp))
drrw->drr_flags |= DRR_RAW_BYTESWAP;
zio_crypt_decode_params_bp(bp, drrw->drr_salt,
@ -435,9 +434,9 @@ dump_spill(dmu_sendarg_t *dsp, const blkptr_t *bp, uint64_t object, void *data)
drrs->drr_toguid = dsp->dsa_toguid;
/* handle raw send fields */
if ((dsp->dsa_featureflags & DMU_BACKUP_FEATURE_RAW) != 0 &&
BP_IS_PROTECTED(bp)) {
drrs->drr_flags |= DRR_RAW_ENCRYPTED;
if (dsp->dsa_featureflags & DMU_BACKUP_FEATURE_RAW) {
ASSERT(BP_IS_PROTECTED(bp));
if (BP_SHOULD_BYTESWAP(bp))
drrs->drr_flags |= DRR_RAW_BYTESWAP;
drrs->drr_compressiontype = BP_GET_COMPRESS(bp);
@ -543,9 +542,9 @@ dump_dnode(dmu_sendarg_t *dsp, const blkptr_t *bp, uint64_t object,
drro->drr_blksz > SPA_OLD_MAXBLOCKSIZE)
drro->drr_blksz = SPA_OLD_MAXBLOCKSIZE;
if ((dsp->dsa_featureflags & DMU_BACKUP_FEATURE_RAW) &&
BP_IS_PROTECTED(bp)) {
drro->drr_flags |= DRR_RAW_ENCRYPTED;
if ((dsp->dsa_featureflags & DMU_BACKUP_FEATURE_RAW)) {
ASSERT(BP_IS_ENCRYPTED(bp));
if (BP_SHOULD_BYTESWAP(bp))
drro->drr_flags |= DRR_RAW_BYTESWAP;
@ -602,7 +601,6 @@ dump_object_range(dmu_sendarg_t *dsp, const blkptr_t *bp, uint64_t firstobj,
drror->drr_firstobj = firstobj;
drror->drr_numslots = numslots;
drror->drr_toguid = dsp->dsa_toguid;
drror->drr_flags |= DRR_RAW_ENCRYPTED;
if (BP_SHOULD_BYTESWAP(bp))
drror->drr_flags |= DRR_RAW_BYTESWAP;
zio_crypt_decode_params_bp(bp, drror->drr_salt, drror->drr_iv);
@ -1725,15 +1723,13 @@ dmu_recv_begin_check(void *arg, dmu_tx_t *tx)
return (error);
}
if (!origin->ds_is_snapshot) {
dsl_dataset_rele_flags(origin,
DS_HOLD_FLAG_DECRYPT, FTAG);
dsl_dataset_rele_flags(origin, dsflags, FTAG);
dsl_dataset_rele_flags(ds, dsflags, FTAG);
return (SET_ERROR(EINVAL));
}
if (dsl_dataset_phys(origin)->ds_guid != fromguid &&
fromguid != 0) {
dsl_dataset_rele_flags(origin,
DS_HOLD_FLAG_DECRYPT, FTAG);
dsl_dataset_rele_flags(origin, dsflags, FTAG);
dsl_dataset_rele_flags(ds, dsflags, FTAG);
return (SET_ERROR(ENODEV));
}
@ -2136,6 +2132,7 @@ struct receive_writer_arg {
/* A map from guid to dataset to help handle dedup'd streams. */
avl_tree_t *guid_to_ds_map;
boolean_t resumable;
boolean_t raw;
uint64_t last_object, last_offset;
uint64_t bytes_read; /* bytes read when current record created */
};
@ -2170,6 +2167,7 @@ struct receive_arg {
zio_cksum_t prev_cksum;
int err;
boolean_t byteswap;
boolean_t raw;
uint64_t featureflags;
/* Sorted list of objects not to issue prefetches for. */
struct objlist ignore_objlist;
@ -2416,7 +2414,7 @@ receive_object(struct receive_writer_arg *rwa, struct drr_object *drro,
return (SET_ERROR(EINVAL));
}
if (DRR_IS_RAW_ENCRYPTED(drro->drr_flags)) {
if (rwa->raw) {
if (drro->drr_raw_bonuslen < drro->drr_bonuslen ||
drro->drr_indblkshift > SPA_MAXBLOCKSHIFT ||
drro->drr_nlevels > DN_MAX_LEVELS ||
@ -2451,13 +2449,12 @@ receive_object(struct receive_writer_arg *rwa, struct drr_object *drro,
drro->drr_bonuslen);
/* nblkptr will be bounded by the bonus size and type */
if (DRR_IS_RAW_ENCRYPTED(drro->drr_flags) &&
nblkptr != drro->drr_nblkptr)
if (rwa->raw && nblkptr != drro->drr_nblkptr)
return (SET_ERROR(EINVAL));
if (drro->drr_blksz != doi.doi_data_block_size ||
nblkptr < doi.doi_nblkptr ||
(DRR_IS_RAW_ENCRYPTED(drro->drr_flags) &&
(rwa->raw &&
(indblksz != doi.doi_metadata_block_size ||
drro->drr_nlevels < doi.doi_indirection))) {
err = dmu_free_long_range(rwa->os, drro->drr_object,
@ -2492,17 +2489,20 @@ receive_object(struct receive_writer_arg *rwa, struct drr_object *drro,
drro->drr_bonustype, drro->drr_bonuslen, tx);
}
if (err != 0) {
dmu_tx_abort(tx);
dmu_tx_commit(tx);
return (SET_ERROR(EINVAL));
}
if (rwa->raw)
VERIFY0(dmu_object_dirty_raw(rwa->os, drro->drr_object, tx));
dmu_object_set_checksum(rwa->os, drro->drr_object,
drro->drr_checksumtype, tx);
dmu_object_set_compress(rwa->os, drro->drr_object,
drro->drr_compress, tx);
/* handle more restrictive dnode structuring for raw recvs */
if (DRR_IS_RAW_ENCRYPTED(drro->drr_flags)) {
if (rwa->raw) {
/*
* Set the indirect block shift and nlevels. This will not fail
* because we ensured all of the blocks were free earlier if
@ -2518,7 +2518,7 @@ receive_object(struct receive_writer_arg *rwa, struct drr_object *drro,
dmu_buf_t *db;
uint32_t flags = DMU_READ_NO_PREFETCH;
if (DRR_IS_RAW_ENCRYPTED(drro->drr_flags))
if (rwa->raw)
flags |= DMU_READ_NO_DECRYPT;
VERIFY0(dmu_bonus_hold_impl(rwa->os, drro->drr_object,
@ -2532,7 +2532,7 @@ receive_object(struct receive_writer_arg *rwa, struct drr_object *drro,
* Raw bonus buffers have their byteorder determined by the
* DRR_OBJECT_RANGE record.
*/
if (rwa->byteswap && !DRR_IS_RAW_ENCRYPTED(drro->drr_flags)) {
if (rwa->byteswap && !rwa->raw) {
dmu_object_byteswap_t byteswap =
DMU_OT_BYTESWAP(drro->drr_bonustype);
dmu_ot_byteswap[byteswap].ob_func(db->db_data,
@ -2615,6 +2615,10 @@ receive_write(struct receive_writer_arg *rwa, struct drr_write *drrw,
dmu_tx_abort(tx);
return (err);
}
if (rwa->raw)
VERIFY0(dmu_object_dirty_raw(rwa->os, drrw->drr_object, tx));
if (rwa->byteswap && !arc_is_encrypted(abuf) &&
arc_get_compression(abuf) == ZIO_COMPRESS_OFF) {
dmu_object_byteswap_t byteswap =
@ -2680,9 +2684,8 @@ receive_write_byref(struct receive_writer_arg *rwa,
ref_os = rwa->os;
}
if (DRR_IS_RAW_ENCRYPTED(drrwbr->drr_flags)) {
if (rwa->raw)
flags |= DMU_READ_NO_DECRYPT;
}
/* may return either a regular db or an encrypted one */
err = dmu_buf_hold(ref_os, drrwbr->drr_refobject,
@ -2700,7 +2703,8 @@ receive_write_byref(struct receive_writer_arg *rwa,
return (err);
}
if (DRR_IS_RAW_ENCRYPTED(drrwbr->drr_flags)) {
if (rwa->raw) {
VERIFY0(dmu_object_dirty_raw(rwa->os, drrwbr->drr_object, tx));
dmu_copy_from_buf(rwa->os, drrwbr->drr_object,
drrwbr->drr_offset, dbp, tx);
} else {
@ -2766,7 +2770,7 @@ receive_spill(struct receive_writer_arg *rwa, struct drr_spill *drrs,
drrs->drr_length > spa_maxblocksize(dmu_objset_spa(rwa->os)))
return (SET_ERROR(EINVAL));
if (DRR_IS_RAW_ENCRYPTED(drrs->drr_flags)) {
if (rwa->raw) {
if (!DMU_OT_IS_VALID(drrs->drr_type) ||
drrs->drr_compressiontype >= ZIO_COMPRESS_FUNCTIONS ||
drrs->drr_compressed_size == 0)
@ -2794,6 +2798,8 @@ receive_spill(struct receive_writer_arg *rwa, struct drr_spill *drrs,
return (err);
}
dmu_buf_will_dirty(db_spill, tx);
if (rwa->raw)
VERIFY0(dmu_object_dirty_raw(rwa->os, drrs->drr_object, tx));
if (db_spill->db_size < drrs->drr_length)
VERIFY(0 == dbuf_spill_set_blksz(db_spill,
@ -2859,7 +2865,7 @@ receive_object_range(struct receive_writer_arg *rwa,
*/
if (drror->drr_numslots != DNODES_PER_BLOCK ||
P2PHASE(drror->drr_firstobj, DNODES_PER_BLOCK) != 0 ||
!DRR_IS_RAW_ENCRYPTED(drror->drr_flags))
!rwa->raw)
return (SET_ERROR(EINVAL));
offset = drror->drr_firstobj * sizeof (dnode_phys_t);
@ -3143,7 +3149,7 @@ receive_read_record(struct receive_arg *ra)
arc_buf_t *abuf;
boolean_t is_meta = DMU_OT_IS_METADATA(drrw->drr_type);
if (DRR_IS_RAW_ENCRYPTED(drrw->drr_flags)) {
if (ra->raw) {
boolean_t byteorder = ZFS_HOST_BYTEORDER ^
!!DRR_IS_RAW_BYTESWAPPED(drrw->drr_flags) ^
ra->byteswap;
@ -3227,7 +3233,7 @@ receive_read_record(struct receive_arg *ra)
int len = DRR_SPILL_PAYLOAD_SIZE(drrs);
/* DRR_SPILL records are either raw or uncompressed */
if (DRR_IS_RAW_ENCRYPTED(drrs->drr_flags)) {
if (ra->raw) {
boolean_t byteorder = ZFS_HOST_BYTEORDER ^
!!DRR_IS_RAW_BYTESWAPPED(drrs->drr_flags) ^
ra->byteswap;
@ -3529,6 +3535,7 @@ dmu_recv_stream(dmu_recv_cookie_t *drc, vnode_t *vp, offset_t *voffp,
rwa = kmem_zalloc(sizeof (*rwa), KM_SLEEP);
ra->byteswap = drc->drc_byteswap;
ra->raw = drc->drc_raw;
ra->cksum = drc->drc_cksum;
ra->vp = vp;
ra->voff = *voffp;
@ -3556,16 +3563,23 @@ dmu_recv_stream(dmu_recv_cookie_t *drc, vnode_t *vp, offset_t *voffp,
featureflags = DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo);
ra->featureflags = featureflags;
/* embedded data is incompatible with encrypted datasets */
if (ra->os->os_encrypted &&
(featureflags & DMU_BACKUP_FEATURE_EMBED_DATA)) {
err = SET_ERROR(EINVAL);
goto out;
}
/* if this stream is dedup'ed, set up the avl tree for guid mapping */
if (featureflags & DMU_BACKUP_FEATURE_DEDUP) {
minor_t minor;
if (cleanup_fd == -1) {
ra->err = SET_ERROR(EBADF);
err = SET_ERROR(EBADF);
goto out;
}
ra->err = zfs_onexit_fd_hold(cleanup_fd, &minor);
if (ra->err != 0) {
err = zfs_onexit_fd_hold(cleanup_fd, &minor);
if (err != 0) {
cleanup_fd = -1;
goto out;
}
@ -3579,12 +3593,12 @@ dmu_recv_stream(dmu_recv_cookie_t *drc, vnode_t *vp, offset_t *voffp,
err = zfs_onexit_add_cb(minor,
free_guid_map_onexit, rwa->guid_to_ds_map,
action_handlep);
if (ra->err != 0)
if (err != 0)
goto out;
} else {
err = zfs_onexit_cb_data(minor, *action_handlep,
(void **)&rwa->guid_to_ds_map);
if (ra->err != 0)
if (err != 0)
goto out;
}
@ -3640,6 +3654,7 @@ dmu_recv_stream(dmu_recv_cookie_t *drc, vnode_t *vp, offset_t *voffp,
rwa->os = ra->os;
rwa->byteswap = drc->drc_byteswap;
rwa->resumable = drc->drc_resumable;
rwa->raw = drc->drc_raw;
(void) thread_create(NULL, 0, receive_writer_thread, rwa, 0, curproc,
TS_RUN, minclsyspri);