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authorXavier Hernandez <xhernandez@datalab.es>2014-10-08 09:20:11 +0200
committerVijay Bellur <vbellur@redhat.com>2014-10-21 11:38:45 -0700
commit56caf4349c8824fde70783fe404cc6f646dce149 (patch)
tree02bef10cd75c1422c3ed272d5ecd01edcb404033 /tests/basic/ec
parentd57ecca6322a451242f4a2b7b5978de7c8f9088e (diff)
ec: Fix self-heal issues
Problem: Doing an 'ls' of a directory that has been modified while one of the bricks was down, sometimes returns the old directory contents. Cause: Directories are not marked when they are modified as files are. The ec xlator balances requests amongst available and healthy bricks. Since there is no way to detect that a directory is out of date in one of the bricks, it is used from time to time to return the directory contents. Solution: Basically the solution consists in use versioning information also for directories, however some additional changes have been necessary. Changes: * Use directory versioning: This required to lock full directory instead of a single entry for all requests that add or remove entries from it. This is needed to allow atomic version update. This affects the following fops: create, mkdir, mknod, link, symlink, rename, unlink, rmdir Another side effect is that opendir requires to do a previous lookup to get versioning information and discard out of date bricks for subsequent readdir(p) calls. * Restrict directory self-heal: Till now, when one discrepancy was found in lookup, a self-heal was automatically started. This caused the versioning information of a bad directory to be healed instantly, making the original problem to reapear again. To solve this, when a missing directory is detected in one or more bricks on lookup or opendir fops, only a partial self-heal is performed on it. A partial self-heal basically creates the directory but does not restore any additional information. This avoids that an 'ls' could repair the directory and cause the problem to happen again. With this change, output of 'ls' is always consistent. However, since the directory has been created in the brick, this allows any other operation on it (create new files, for example) to succeed on all bricks and not add additional work to the self-heal process. To force a self-heal of a directory, any other operation must be done on it. For example a getxattr. With these changes, the correct healing procedure that would avoid inconsistent directory browsing consists on a post-order traversal of directoriesi being healed. This way, the directory contents will be healed before healing the directory itslef. * Additional changes to fix self-heal errors - Don't use fop->fd to decide between fd/loc. open, opendir and create have an fd, but the correct data is in loc. - Fix incorrect management of bad bricks per inode/fd. - Fix incorrect selection of fop's target bricks when there are bad bricks involved. - Improved ec_loc_parent() to always return a parent loc as complete as possible. Change-Id: Iaf3df174d7857da57d4a87b4a8740a7048b366ad BUG: 1149726 Signed-off-by: Xavier Hernandez <xhernandez@datalab.es> Reviewed-on: http://review.gluster.org/8916 Reviewed-by: Dan Lambright <dlambrig@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com>
Diffstat (limited to 'tests/basic/ec')
-rw-r--r--tests/basic/ec/ec.t59
-rw-r--r--tests/basic/ec/self-heal.t151
2 files changed, 166 insertions, 44 deletions
diff --git a/tests/basic/ec/ec.t b/tests/basic/ec/ec.t
index c12aba3afe6..7b8a8568129 100644
--- a/tests/basic/ec/ec.t
+++ b/tests/basic/ec/ec.t
@@ -45,66 +45,97 @@ function check_truncate {
}
function check_hard_link {
+ stat $M0/hard-link-1
+ stat $M0/hard-link-2
for b in $*; do
inum1=$(ls -i $b/hard-link-1 | cut -d' ' -f1)
inum2=$(ls -i $b/hard-link-2 | cut -d' ' -f1)
- [ "$inum1" = "$inum2" ] || return 1
+ if [ "$inum1" != "$inum2" ]; then
+ echo "N"
+ return 0
+ fi
done
echo "Y"
return 0
}
function check_soft_link {
+ stat $M0/soft-link
for b in $*; do
- [ "$(readlink $b/soft-link)" = "soft-link-tgt" ] || return 1
+ if [ "$(readlink $b/soft-link)" != "soft-link-tgt" ]; then
+ echo "N"
+ return 0
+ fi
done
echo "Y"
return 0
}
function check_unlink {
+ stat $M0/unlink
for b in $*; do
- [ ! -e $b/unlink ] || return 1
+ if [ -e $b/unlink ]; then
+ echo "N"
+ return 0
+ fi
done
echo "Y"
return 0
}
function check_mkdir {
+ getfattr -m. -d $M0/mkdir
for b in $*; do
- [ -d $b/mkdir ] || return 1
+ if [ ! -d $b/mkdir ]; then
+ echo "N"
+ return 0
+ fi
done
echo "Y"
return 0
}
function check_rmdir {
+ getfattr -m. -d $M0/rmdir
for b in $*; do
- [ ! -e $b/rmdir ] || return 1
+ if [ -e $b/rmdir ]; then
+ echo "N"
+ return 0
+ fi
done
echo "Y"
return 0
}
function check_setxattr {
+ stat $M0/setxattr
for b in $*; do
v=$(my_getfattr -n user.foo $b/setxattr)
- [ "$v" = "ash_nazg_durbatuluk" ] || return 1
+ if [ "$v" != "ash_nazg_durbatuluk" ]; then
+ echo "N"
+ return 0
+ fi
done
echo "Y"
return 0
}
function check_removexattr {
+ stat $M0/removexattr
for b in $*; do
my_getfattr -n user.bar $b/removexattr 2> /dev/null
- [ $? = 0 ] && return 1
+ if [ $? -eq 0 ]; then
+ echo "N"
+ return 0
+ fi
done
echo "Y"
return 0
}
function check_perm_file {
+ stat $M0/perm_dir/perm_file
+ getfattr -m. -d $M0/perm_dir
b1=$1
shift 1
ftext=$(stat -c "%u %g %a" $b1/perm_dir/perm_file)
@@ -113,7 +144,8 @@ function check_perm_file {
btext=$(stat -c "%u %g %a" $b/perm_dir/perm_file)
#echo " next u/a/a = $btext" > /dev/tty
if [ x"$btext" != x"$ftext" ]; then
- return 1
+ echo "N"
+ return 0
fi
done
echo "Y"
@@ -210,17 +242,6 @@ EXPECT_WITHIN $CHILD_UP_TIMEOUT "10" ec_child_up_count $V0 0
TEST check_create_write $M0
TEST check_truncate $M0
-TEST stat $M0/hard-link-1
-TEST stat $M0/hard-link-2
-TEST stat $M0/soft-link
-TEST ! stat $M0/unlink
-TEST ! stat $M0/rmdir
-TEST stat $M0/mkdir
-TEST stat $M0/setxattr
-TEST stat $M0/removexattr
-TEST stat $M0/perm_dir
-TEST stat $M0/perm_dir/perm_file
-
EXPECT_WITHIN $HEAL_TIMEOUT "Y" check_hard_link $B0/${V0}{0..9}
EXPECT_WITHIN $HEAL_TIMEOUT "Y" check_soft_link $B0/${V0}{0..9}
EXPECT_WITHIN $HEAL_TIMEOUT "Y" check_unlink $B0/${V0}{0..9}
diff --git a/tests/basic/ec/self-heal.t b/tests/basic/ec/self-heal.t
index d8a2f7988a0..ae7e4fe495a 100644
--- a/tests/basic/ec/self-heal.t
+++ b/tests/basic/ec/self-heal.t
@@ -7,12 +7,119 @@
cleanup
+function check_mount_dir
+{
+ for i in {1..20}; do
+ ls | grep "dir1"
+ if [ $? -ne 0 ]; then
+ return 1
+ fi
+ done
+
+ return 0
+}
+
+function check_size
+{
+ stat $1
+ for i in "${brick[@]}"; do
+ res=`stat -c "%s" $i/$1`
+ if [ "$res" != "$2" ]; then
+ echo "N"
+ return 0
+ fi
+ done
+ echo "Y"
+ return 0
+}
+
+function check_mode
+{
+ stat $1
+ for i in "${brick[@]}"; do
+ res=`stat -c "%A" $i/$1`
+ if [ "$res" != "$2" ]; then
+ echo "N"
+ return 0
+ fi
+ done
+ echo "Y"
+ return 0
+}
+
+function check_date
+{
+ stat $1
+ for i in "${brick[@]}"; do
+ res=`stat -c "%Y" $i/$1`
+ if [ "$res" != "$2" ]; then
+ echo "N"
+ return 0
+ fi
+ done
+ echo "Y"
+ return 0
+}
+
+function check_xattr
+{
+ stat $1
+ for i in "${brick[@]}"; do
+ getfattr -n $2 $i/$1 2>/dev/null
+ if [ $? -eq 0 ]; then
+ echo "N"
+ return 0
+ fi
+ done
+ echo "Y"
+ return 0
+}
+
+function check_dir
+{
+ getfattr -m. -d dir1
+ for i in "${brick[@]}"; do
+ if [ ! -d $i/dir1 ]; then
+ echo "N"
+ return 0
+ fi
+ done
+ echo "Y"
+ return 0
+}
+
+function check_soft_link
+{
+ stat test3
+ for i in "${brick[@]}"; do
+ if [ ! -h $i/test3 ]; then
+ echo "N"
+ return 0
+ fi
+ done
+ echo "Y"
+ return 0
+}
+
+function check_hard_link
+{
+ stat test4
+ for i in "${brick[@]}"; do
+ if [ `stat -c "%h" $i/test4` -ne 3 ]; then
+ echo "N"
+ return 0
+ fi
+ done
+ echo "Y"
+ return 0
+}
+
tmp=`mktemp -d -t ${0##*/}.XXXXXX`
if [ ! -d $tmp ]; then
exit 1
fi
-TESTS_EXPECTED_IN_LOOP=250
+TESTS_EXPECTED_IN_LOOP=194
TEST glusterd
TEST pidof glusterd
@@ -21,6 +128,7 @@ EXPECT "Created" volinfo_field $V0 'Status'
TEST $CLI volume start $V0
EXPECT_WITHIN $PROCESS_UP_TIMEOUT "Started" volinfo_field $V0 'Status'
TEST $GFS --volfile-id=/$V0 --volfile-server=$H0 $M0;
+# Wait until all 6 childs have been recognized by the ec xlator
EXPECT_WITHIN $CHILD_UP_TIMEOUT "6" ec_child_up_count $V0 0
TEST dd if=/dev/urandom of=$tmp/test bs=1024 count=1024
@@ -46,12 +154,11 @@ for idx1 in {0..5}; do
TEST chmod 666 ${brick[$idx1]}/test
TEST truncate -s 0 ${brick[$idx1]}/test
TEST setfattr -n user.test -v "test1" ${brick[$idx1]}/test
- sleep 1
EXPECT "-rw-r--r--" stat -c "%A" test
- EXPECT_WITHIN $HEAL_TIMEOUT "262144" stat -c "%s" ${brick[$idx1]}/test
- EXPECT_WITHIN $HEAL_TIMEOUT "-rw-r--r--" stat -c "%A" ${brick[$idx1]}/test
- EXPECT_WITHIN $HEAL_TIMEOUT "946681200" stat -c "%Y" ${brick[$idx1]}/test
- TEST ! getfattr -n user.test ${brick[$idx1]}/test
+ EXPECT_WITHIN $HEAL_TIMEOUT "Y" check_size test "262144"
+ EXPECT_WITHIN $HEAL_TIMEOUT "Y" check_mode test "-rw-r--r--"
+ EXPECT_WITHIN $HEAL_TIMEOUT "Y" check_date test "946681200"
+ EXPECT_WITHIN $HEAL_TIMEOUT "Y" check_xattr test "user.test"
done
for idx1 in {0..4}; do
@@ -63,16 +170,11 @@ for idx1 in {0..4}; do
TEST truncate -s 2097152 ${brick[$idx2]}/test
TEST setfattr -n user.test -v "test1" ${brick[$idx1]}/test
TEST setfattr -n user.test -v "test2" ${brick[$idx2]}/test
- sleep 1
EXPECT "-rw-r--r--" stat -c "%A" test
- EXPECT_WITHIN $HEAL_TIMEOUT "262144" stat -c "%s" ${brick[$idx1]}/test
- EXPECT_WITHIN $HEAL_TIMEOUT "262144" stat -c "%s" ${brick[$idx2]}/test
- EXPECT_WITHIN $HEAL_TIMEOUT "-rw-r--r--" stat -c "%A" ${brick[$idx1]}/test
- EXPECT_WITHIN $HEAL_TIMEOUT "-rw-r--r--" stat -c "%A" ${brick[$idx2]}/test
- EXPECT_WITHIN $HEAL_TIMEOUT "946681200" stat -c "%Y" ${brick[$idx1]}/test
- EXPECT_WITHIN $HEAL_TIMEOUT "946681200" stat -c "%Y" ${brick[$idx2]}/test
- TEST ! getfattr -n user.test ${brick[$idx1]}/test
- TEST ! getfattr -n user.test ${brick[$idx2]}/test
+ EXPECT_WITHIN $HEAL_TIMEOUT "Y" check_size test "262144"
+ EXPECT_WITHIN $HEAL_TIMEOUT "Y" check_mode test "-rw-r--r--"
+ EXPECT_WITHIN $HEAL_TIMEOUT "Y" check_date test "946681200"
+ EXPECT_WITHIN $HEAL_TIMEOUT "Y" check_xattr test "user.test"
fi
done
done
@@ -96,26 +198,25 @@ EXPECT "2" stat -c "%h" test2
EXPECT "2" stat -c "%h" test4
TEST $CLI volume start $V0 force
+# Wait until the killed bricks have been started and recognized by the ec
+# xlator
EXPECT_WITHIN $CHILD_UP_TIMEOUT "6" ec_child_up_count $V0 0
+TEST check_mount_dir
+
EXPECT "1048576" stat -c "%s" test2
EXPECT "-rwxrwxrwx" stat -c "%A" test2
-EXPECT_WITHIN $HEAL_TIMEOUT "262144" stat -c "%s" ${brick[0]}/test2
-EXPECT_WITHIN $HEAL_TIMEOUT "262144" stat -c "%s" ${brick[1]}/test2
-EXPECT "-rwxrwxrwx" stat -c "%A" ${brick[0]}/test2
-EXPECT "-rwxrwxrwx" stat -c "%A" ${brick[1]}/test2
+EXPECT_WITHIN $HEAL_TIMEOUT "Y" check_size test2 "262144"
+EXPECT_WITHIN $HEAL_TIMEOUT "Y" check_mode test2 "-rwxrwxrwx"
TEST ls -al dir1
-EXPECT_WITHIN $HEAL_TIMEOUT "1" eval "if [ -d ${brick[0]}/dir1 ]; then echo 1; fi"
-EXPECT_WITHIN $HEAL_TIMEOUT "1" eval "if [ -d ${brick[1]}/dir1 ]; then echo 1; fi"
+EXPECT_WITHIN $HEAL_TIMEOUT "Y" check_dir
TEST [ -h test3 ]
-EXPECT_WITHIN $HEAL_TIMEOUT "1" eval "if [ -h ${brick[0]}/test3 ]; then echo 1; fi"
-EXPECT_WITHIN $HEAL_TIMEOUT "1" eval "if [ -h ${brick[1]}/test3 ]; then echo 1; fi"
+EXPECT_WITHIN $HEAL_TIMEOUT "Y" check_soft_link
EXPECT "2" stat -c "%h" test4
-EXPECT_WITHIN $HEAL_TIMEOUT "3" stat -c "%h" ${brick[0]}/test4
-EXPECT_WITHIN $HEAL_TIMEOUT "3" stat -c "%h" ${brick[1]}/test4
+EXPECT_WITHIN $HEAL_TIMEOUT "Y" check_hard_link
TEST rm -rf $tmp