diff options
author | Ravishankar N <ravishankar@redhat.com> | 2016-12-30 14:57:17 +0530 |
---|---|---|
committer | Jeff Darcy <jdarcy@redhat.com> | 2017-01-12 18:54:02 -0800 |
commit | 522640be476a3f97dac932f7046f0643ec0ec2f2 (patch) | |
tree | 546c9c1c9d7143041c185c99b84fb2504d341c3c /xlators/cluster | |
parent | 79b3fb6e8d3c9d681917be6e6c9f6ba04eb73f82 (diff) |
afr: Avoid resetting event_gen when brick is always down
Problem:
__afr_set_in_flight_sb_status(), which resets event_gen to zero, is
called if failed_subvols[i] is non-zero for any brick. But failed_subvols[i]
is true even if the brick was down *before* the transaction started.
Hence say if 1 brick is down in a replica-3, every writev that comes
will trigger an inode refresh because of this resetting, as seen from
the no. of FSTATs in the profile info in the BZ.
Fix:
Reset event gen only if the brick was previously a valid read child and
the FOP failed on it the first time.
Also `s/afr_inode_read_subvol_reset/afr_inode_event_gen_reset` because
the function only resets event gen and not the data/metadata readable.
Change-Id: I603ae646cbde96995c35db77916e2ed80b602a91
BUG: 1409206
Signed-off-by: Ravishankar N <ravishankar@redhat.com>
Reviewed-on: http://review.gluster.org/16309
Smoke: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
Tested-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Diffstat (limited to 'xlators/cluster')
-rw-r--r-- | xlators/cluster/afr/src/afr-common.c | 24 | ||||
-rw-r--r-- | xlators/cluster/afr/src/afr-dir-write.c | 6 | ||||
-rw-r--r-- | xlators/cluster/afr/src/afr.h | 6 |
3 files changed, 17 insertions, 19 deletions
diff --git a/xlators/cluster/afr/src/afr-common.c b/xlators/cluster/afr/src/afr-common.c index a400031b404..7f4db5c3778 100644 --- a/xlators/cluster/afr/src/afr-common.c +++ b/xlators/cluster/afr/src/afr-common.c @@ -155,6 +155,7 @@ __afr_inode_ctx_get (xlator_t *this, inode_t *inode, afr_inode_ctx_t **ctx) out: return ret; } + /* * INODE CTX 64-bit VALUE FORMAT FOR SMALL (<= 16) SUBVOL COUNTS: * @@ -216,10 +217,7 @@ __afr_set_in_flight_sb_status (xlator_t *this, afr_local_t *local, metadatamap_old = metadatamap = (val & 0x000000000000ffff); datamap_old = datamap = (val & 0x00000000ffff0000) >> 16; - /* Hard-code event to 0 since there is a failure and the inode - * needs to be refreshed anyway. - */ - event = 0; + event = (val & 0xffffffff00000000) >> 32; if (txn_type == AFR_DATA_TRANSACTION) tmp_map = datamap; @@ -252,6 +250,8 @@ __afr_set_in_flight_sb_status (xlator_t *this, afr_local_t *local, local->transaction.in_flight_sb = _gf_true; metadatamap |= (1 << index); } + if (metadatamap_old != metadatamap) + event = 0; break; case AFR_DATA_TRANSACTION: @@ -261,10 +261,12 @@ __afr_set_in_flight_sb_status (xlator_t *this, afr_local_t *local, local->transaction.in_flight_sb = _gf_true; datamap |= (1 << index); } + if (datamap_old != datamap) + event = 0; break; default: - break; + break; } val = ((uint64_t) metadatamap) | @@ -375,7 +377,7 @@ out: } int -__afr_inode_read_subvol_reset_small (inode_t *inode, xlator_t *this) +__afr_inode_event_gen_reset_small (inode_t *inode, xlator_t *this) { int ret = -1; uint16_t datamap = 0; @@ -476,7 +478,7 @@ out: } int -__afr_inode_read_subvol_reset (inode_t *inode, xlator_t *this) +__afr_inode_event_gen_reset (inode_t *inode, xlator_t *this) { afr_private_t *priv = NULL; int ret = -1; @@ -484,7 +486,7 @@ __afr_inode_read_subvol_reset (inode_t *inode, xlator_t *this) priv = this->private; if (priv->child_count <= 16) - ret = __afr_inode_read_subvol_reset_small (inode, this); + ret = __afr_inode_event_gen_reset_small (inode, this); else ret = -1; @@ -673,7 +675,7 @@ out: } int -afr_inode_read_subvol_reset (inode_t *inode, xlator_t *this) +afr_inode_event_gen_reset (inode_t *inode, xlator_t *this) { int ret = -1; @@ -681,7 +683,7 @@ afr_inode_read_subvol_reset (inode_t *inode, xlator_t *this) LOCK(&inode->lock); { - ret = __afr_inode_read_subvol_reset (inode, this); + ret = __afr_inode_event_gen_reset (inode, this); } UNLOCK(&inode->lock); out: @@ -2209,7 +2211,7 @@ afr_lookup_done (call_frame_t *frame, xlator_t *this) if (afr_replies_interpret (frame, this, local->inode, NULL)) { read_subvol = afr_read_subvol_decide (local->inode, this, &args); - afr_inode_read_subvol_reset (local->inode, this); + afr_inode_event_gen_reset (local->inode, this); goto cant_interpret; } else { read_subvol = afr_data_subvol_get (local->inode, this, diff --git a/xlators/cluster/afr/src/afr-dir-write.c b/xlators/cluster/afr/src/afr-dir-write.c index 286a5392da6..8e483c382c4 100644 --- a/xlators/cluster/afr/src/afr-dir-write.c +++ b/xlators/cluster/afr/src/afr-dir-write.c @@ -122,12 +122,12 @@ __afr_dir_write_finalize (call_frame_t *frame, xlator_t *this) continue; if (local->replies[i].op_ret < 0) { if (local->inode) - afr_inode_read_subvol_reset (local->inode, this); + afr_inode_event_gen_reset (local->inode, this); if (local->parent) - afr_inode_read_subvol_reset (local->parent, + afr_inode_event_gen_reset (local->parent, this); if (local->parent2) - afr_inode_read_subvol_reset (local->parent2, + afr_inode_event_gen_reset (local->parent2, this); continue; } diff --git a/xlators/cluster/afr/src/afr.h b/xlators/cluster/afr/src/afr.h index b38d4d92b58..0535e7c7271 100644 --- a/xlators/cluster/afr/src/afr.h +++ b/xlators/cluster/afr/src/afr.h @@ -894,7 +894,7 @@ afr_inode_read_subvol_set (inode_t *inode, xlator_t *this, int event_generation); int -afr_inode_read_subvol_reset (inode_t *inode, xlator_t *this); +afr_inode_event_gen_reset (inode_t *inode, xlator_t *this); int afr_read_subvol_select_by_policy (inode_t *inode, xlator_t *this, @@ -918,10 +918,6 @@ afr_read_subvol_get (inode_t *inode, xlator_t *this, int *subvol_p, afr_read_subvol_get(i, t, s, r, e, AFR_METADATA_TRANSACTION, a) int -afr_inode_ctx_reset_unreadable_subvol (inode_t *inode, xlator_t *this, - int subvol_idx, int txn_type); - -int afr_inode_refresh (call_frame_t *frame, xlator_t *this, inode_t *inode, uuid_t gfid, afr_inode_refresh_cbk_t cbk); |