From ccaad48f51d4e8d3de001dc3907df68c69f8792b Mon Sep 17 00:00:00 2001 From: Pranith Kumar K Date: Mon, 27 Aug 2018 11:46:33 +0530 Subject: cluster/afr: Delegate metadata heal with pending xattrs to SHD Problem: When metadata-self-heal is triggered on the mount, it blocks lookup until metadata-self-heal completes. But that can lead to hangs when lot of clients are accessing a directory which needs metadata heal and all of them trigger heals waiting for other clients to complete heal. Fix: Only when the heal is needed but the pending xattrs are not set, trigger metadata heal that could block lookup. This is the only case where different clients may give different metadata to the clients without heals, which should be avoided. Updates bz#1622821 Change-Id: I6089e9fda0770a83fb287941b229c882711f4e66 Signed-off-by: Pranith Kumar K --- tests/basic/afr/client-side-heal.t | 28 ++++++++++------ tests/bugs/glusterfs/bug-906646.t | 10 ++++-- xlators/cluster/afr/src/afr-common.c | 44 ++++++++++++++++++++++++++ xlators/cluster/afr/src/afr-self-heal-common.c | 38 ---------------------- xlators/cluster/afr/src/afr.h | 3 ++ 5 files changed, 72 insertions(+), 51 deletions(-) diff --git a/tests/basic/afr/client-side-heal.t b/tests/basic/afr/client-side-heal.t index eba7dc2b3c4..1e9336184b5 100755 --- a/tests/basic/afr/client-side-heal.t +++ b/tests/basic/afr/client-side-heal.t @@ -17,6 +17,7 @@ TEST $GFS --volfile-id=$V0 --volfile-server=$H0 $M0; echo "some data" > $M0/datafile EXPECT 0 echo $? TEST touch $M0/mdatafile +TEST touch $M0/mdatafile-backend-direct-modify TEST mkdir $M0/dir #Kill a brick and perform I/O to have pending heals. @@ -29,6 +30,7 @@ EXPECT 0 echo $? #pending metadata heal TEST chmod +x $M0/mdatafile +TEST chmod +x $B0/${V0}0/mdatafile-backend-direct-modify #pending entry heal. Also causes pending metadata/data heals on file{1..5} TEST touch $M0/dir/file{1..5} @@ -40,9 +42,12 @@ TEST $CLI volume start $V0 force EXPECT_WITHIN $PROCESS_UP_TIMEOUT "1" afr_child_up_status $V0 0 #Medatada heal via explicit lookup must not happen -TEST ls $M0/mdatafile +TEST getfattr -d -m. -e hex $M0/mdatafile +TEST ls $M0/mdatafile-backend-direct-modify -#Inode refresh must not trigger data and entry heals. +TEST [[ "$(stat -c %A $B0/${V0}0/mdatafile-backend-direct-modify)" != "$(stat -c %A $B0/${V0}1/mdatafile-backend-direct-modify)" ]] + +#Inode refresh must not trigger data metadata and entry heals. #To trigger inode refresh for sure, the volume is unmounted and mounted each time. #Check that data heal does not happen. EXPECT_WITHIN $UMOUNT_TIMEOUT "Y" force_umount $M0 @@ -52,7 +57,6 @@ TEST cat $M0/datafile EXPECT_WITHIN $UMOUNT_TIMEOUT "Y" force_umount $M0 TEST $GFS --volfile-id=$V0 --volfile-server=$H0 $M0; TEST ls $M0/dir - #No heal must have happened EXPECT 8 get_pending_heal_count $V0 @@ -61,21 +65,25 @@ TEST $CLI volume set $V0 cluster.data-self-heal on TEST $CLI volume set $V0 cluster.metadata-self-heal on TEST $CLI volume set $V0 cluster.entry-self-heal on -#Metadata heal is triggered by lookup without need for inode refresh. -TEST ls $M0/mdatafile -EXPECT 7 get_pending_heal_count $V0 - -#Inode refresh must trigger data and entry heals. +#Inode refresh must trigger data metadata and entry heals. #To trigger inode refresh for sure, the volume is unmounted and mounted each time. EXPECT_WITHIN $UMOUNT_TIMEOUT "Y" force_umount $M0 TEST $GFS --volfile-id=$V0 --volfile-server=$H0 $M0; +TEST ls $M0/mdatafile-backend-direct-modify + +TEST [[ "$(stat -c %A $B0/${V0}0/mdatafile-backend-direct-modify)" == "$(stat -c %A $B0/${V0}1/mdatafile-backend-direct-modify)" ]] + + +TEST getfattr -d -m. -e hex $M0/mdatafile +EXPECT_WITHIN $HEAL_TIMEOUT 7 get_pending_heal_count $V0 + TEST cat $M0/datafile EXPECT_WITHIN $HEAL_TIMEOUT 6 get_pending_heal_count $V0 EXPECT_WITHIN $UMOUNT_TIMEOUT "Y" force_umount $M0 TEST $GFS --volfile-id=$V0 --volfile-server=$H0 $M0; TEST ls $M0/dir -EXPECT 5 get_pending_heal_count $V0 +EXPECT_WITHIN $HEAL_TIMEOUT 5 get_pending_heal_count $V0 TEST cat $M0/dir/file1 TEST cat $M0/dir/file2 @@ -83,5 +91,5 @@ TEST cat $M0/dir/file3 TEST cat $M0/dir/file4 TEST cat $M0/dir/file5 -EXPECT 0 get_pending_heal_count $V0 +EXPECT_WITHIN $HEAL_TIMEOUT 0 get_pending_heal_count $V0 cleanup; diff --git a/tests/bugs/glusterfs/bug-906646.t b/tests/bugs/glusterfs/bug-906646.t index 45c85d9f67c..37b8fe5c8eb 100644 --- a/tests/bugs/glusterfs/bug-906646.t +++ b/tests/bugs/glusterfs/bug-906646.t @@ -13,7 +13,6 @@ TEST pidof glusterd TEST $CLI volume create $V0 replica $REPLICA $H0:$B0/${V0}-00 $H0:$B0/${V0}-01 $H0:$B0/${V0}-10 $H0:$B0/${V0}-11 TEST $CLI volume start $V0 -TEST $CLI volume set $V0 cluster.self-heal-daemon off TEST $CLI volume set $V0 cluster.background-self-heal-count 0 ## Mount FUSE with caching disabled @@ -82,10 +81,15 @@ EXPECT 1 xattr_query_check ${backend_paths_array[1]} "trusted.name" # restart the brick process TEST $CLI volume start $V0 force -EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" afr_child_up_status $V0 `expr $brick_id - 1` +EXPECT_WITHIN $PROCESS_UP_TIMEOUT "Y" glustershd_up_status +EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" afr_child_up_status_in_shd $V0 0 +EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" afr_child_up_status_in_shd $V0 1 +EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" afr_child_up_status_in_shd $V0 2 +EXPECT_WITHIN $CHILD_UP_TIMEOUT "1" afr_child_up_status_in_shd $V0 3 -cat $pth >/dev/null +TEST $CLI volume heal $V0 +EXPECT_WITHIN $HEAL_TIMEOUT "0" get_pending_heal_count $V0 # check backends - xattr should not be present anywhere EXPECT 1 xattr_query_check ${backend_paths_array[0]} "trusted.name" EXPECT 1 xattr_query_check ${backend_paths_array[1]} "trusted.name" diff --git a/xlators/cluster/afr/src/afr-common.c b/xlators/cluster/afr/src/afr-common.c index 8b10e263974..cf55ebe1a63 100644 --- a/xlators/cluster/afr/src/afr-common.c +++ b/xlators/cluster/afr/src/afr-common.c @@ -2692,6 +2692,42 @@ out: return 0; } +gf_boolean_t +afr_is_pending_set (xlator_t *this, dict_t *xdata, int type) +{ + int idx = -1; + afr_private_t *priv = NULL; + void *pending_raw = NULL; + int *pending_int = NULL; + int i = 0; + + priv = this->private; + idx = afr_index_for_transaction_type (type); + + if (dict_get_ptr (xdata, AFR_DIRTY, &pending_raw) == 0) { + if (pending_raw) { + pending_int = pending_raw; + + if (ntoh32 (pending_int[idx])) + return _gf_true; + } + } + + for (i = 0; i < priv->child_count; i++) { + if (dict_get_ptr (xdata, priv->pending_key[i], + &pending_raw)) + continue; + if (!pending_raw) + continue; + pending_int = pending_raw; + + if (ntoh32 (pending_int[idx])) + return _gf_true; + } + + return _gf_false; +} + static gf_boolean_t afr_can_start_metadata_self_heal(call_frame_t *frame, xlator_t *this) { @@ -2718,6 +2754,14 @@ afr_can_start_metadata_self_heal(call_frame_t *frame, xlator_t *this) continue; } + if (afr_is_pending_set (this, replies[i].xdata, + AFR_METADATA_TRANSACTION)) { + /* Let shd do the heal so that lookup is not blocked + * on getting metadata lock/doing the heal */ + start = _gf_false; + break; + } + if (gf_uuid_compare (stbuf.ia_gfid, replies[i].poststat.ia_gfid)) { start = _gf_false; break; diff --git a/xlators/cluster/afr/src/afr-self-heal-common.c b/xlators/cluster/afr/src/afr-self-heal-common.c index 3cb69beabff..a1aad6315ac 100644 --- a/xlators/cluster/afr/src/afr-self-heal-common.c +++ b/xlators/cluster/afr/src/afr-self-heal-common.c @@ -2180,44 +2180,6 @@ afr_selfheal_unentrylk (call_frame_t *frame, xlator_t *this, inode_t *inode, return 0; } - -gf_boolean_t -afr_is_pending_set (xlator_t *this, dict_t *xdata, int type) -{ - int idx = -1; - afr_private_t *priv = NULL; - void *pending_raw = NULL; - int *pending_int = NULL; - int i = 0; - - priv = this->private; - idx = afr_index_for_transaction_type (type); - - if (dict_get_ptr (xdata, AFR_DIRTY, &pending_raw) == 0) { - if (pending_raw) { - pending_int = pending_raw; - - if (ntoh32 (pending_int[idx])) - return _gf_true; - } - } - - for (i = 0; i < priv->child_count; i++) { - if (dict_get_ptr (xdata, priv->pending_key[i], - &pending_raw)) - continue; - if (!pending_raw) - continue; - pending_int = pending_raw; - - if (ntoh32 (pending_int[idx])) - return _gf_true; - } - - return _gf_false; -} - - gf_boolean_t afr_is_data_set (xlator_t *this, dict_t *xdata) { diff --git a/xlators/cluster/afr/src/afr.h b/xlators/cluster/afr/src/afr.h index d32ff5f8d85..155dc1d96af 100644 --- a/xlators/cluster/afr/src/afr.h +++ b/xlators/cluster/afr/src/afr.h @@ -1249,4 +1249,7 @@ afr_ta_post_op_lock (xlator_t *this, loc_t *loc); int afr_ta_post_op_unlock (xlator_t *this, loc_t *loc); + +gf_boolean_t +afr_is_pending_set (xlator_t *this, dict_t *xdata, int type); #endif /* __AFR_H__ */ -- cgit