updates #220

Change-Id: I6e25dbb69b2c7021e00073e8f025d212db7de0be
Signed-off-by: Amar Tumballi <amarts@redhat.com>

md5sum is not fips compliant. Using xxhash64 instead of
md5sum for socket file generation in glusterd and
changelog to enable fips support.

NOTE: md5sum is 128 bit hash. xxhash used is 64 bit.

Updates: #230
Change-Id: I1bf2ea05905b9151cd29fa951f903685ab0dc84c
Signed-off-by: Kotresh HR <khiremat@redhat.com>

This patch creates a new way of defining message id's that is easier
and less error prone because it doesn't require so many manual changes
each time a new component is defined or a new message created.

Change-Id: I71ba8af9ac068f5add7e74f316a2478bc991c67b
Signed-off-by: Xavier Hernandez <jahernan@redhat.com>

Problem: changelog threads are not cleaned properly after receive
         GF_EVENT_CLEANUP while brick mux is enabled

Solution: change changelog notify code path to cleanup threads
          properly

BUG: 1524816
Change-Id: I007f4e14e3d557707df738faf222b78c793d5ab5
Signed-off-by: Mohit Agrawal <moagrawa@redhat.com>

Problem: In glusterfs code base we call mutex_lock/unlock to take
         reference/dereference for a object.Sometime it could be
         reason for lock contention also.

Solution: There is no need to use mutex to increase/decrease ref
          counter, instead of using mutex use gcc builtin ATOMIC
          operation.

Test:   I have not observed yet how much performance gain after apply
        this patch specific to glusterfs but i have tested same
        with below small program(mutex and atomic both) and
        get good difference.

static int numOuterLoops;
static void *
threadFunc(void *arg)
{
    int j;

    for (j = 0; j < numOuterLoops; j++) {
            __atomic_add_fetch (&glob, 1,__ATOMIC_ACQ_REL);
    }
    return NULL;
}

int
main(int argc, char *argv[])
{
    int opt, s, j;
    int numThreads;
    pthread_t *thread;
    int verbose;
    int64_t n = 0;

    if (argc < 2 ) {
     printf(" Please provide 2 args Num of threads && Outer Loop\n");
     exit (-1);
    }
    numThreads = atoi(argv[1]);
    numOuterLoops = atoi (argv[2]);

    if (1) {
        printf("\tthreads: %d; outer loops: %d;\n",
                numThreads, numOuterLoops);
    }

    thread = calloc(numThreads, sizeof(pthread_t));
    if (thread == NULL) {
        printf ("calloc error so exit\n");
        exit (-1);
    }

    __atomic_store (&glob, &n, __ATOMIC_RELEASE);
    for (j = 0; j < numThreads; j++) {
        s = pthread_create(&thread[j], NULL, threadFunc, NULL);
        if (s != 0) {
            printf ("pthread_create failed so exit\n");
            exit (-1);
        }
    }

    for (j = 0; j < numThreads; j++) {
        s = pthread_join(thread[j], NULL);
        if (s != 0) {
            printf ("pthread_join failed so exit\n");
            exit (-1);
        }
    }
    printf("glob value is %ld\n",__atomic_load_n (&glob,__ATOMIC_RELAXED));

    exit(0);
}

   time ./thr_count 800 800000
   threads: 800; outer loops: 800000;
   glob value is 640000000

real	1m10.288s
user	0m57.269s
sys	3m31.565s

time ./thr_count_atomic 800 800000
     threads: 800; outer loops: 800000;
glob value is 640000000

real	0m20.313s
user	1m20.558s
sys	0m0.028

Change-Id: Ie5030a52ea264875e002e108dd4b207b15ab7cc7
Signed-off-by: Mohit Agrawal <moagrawa@redhat.com>

specify ctx in gf_log_set_loglevel, instead of getting it from a thread
specific variable.

Change-Id: I498f826e8e32231235a6b0005026a27c327727fd
BUG: 1521213
Signed-off-by: Zhang Huan <zhanghuan@open-fs.com>

Updates #302

Change-Id: I806e42b658114b242b787491400332299dbdbf77
Signed-off-by: Amar Tumballi <amarts@redhat.com>

Updates: #302

Change-Id: Ibbf0f99d4b81a5e9a5ccee1889214b74f083a7db
Signed-off-by: Aravinda VK <avishwan@redhat.com>

Structured logging infra is available in logging library with
issue #240. Log messages with dynamic content are identified and
converted to structured logging format(`gf_msg` to `gf_smsg` and
`gf_log` to `gf_slog`)

BUG: 1501054
Change-Id: I5fccc354730c07cb9ae444d0b959d1d72bd9be49
Signed-off-by: Aravinda VK <avishwan@redhat.com>

Error: DEADCODE:
xlators/features/changelog/lib/src/gf-changelog-journal-handler.c:524:
dead_error_begin: Execution cannot reach this statement: "default:".

Error: DEADCODE:
xlators/features/changelog/lib/src/gf-history-changelog.c:984:
dead_error_line: Execution cannot reach the expression "to" inside
this statement: "if (!from || !to)
  ret = -1;".

Error: REVERSE_INULL:
xlators/features/changelog/lib/src/gf-changelog-journal-handler.c:678:
check_after_deref: Null-checking "entry" suggests that it may be null,
but it has already been dereferenced on all paths leading to the
check.

Error: STACK_USE:
xlators/features/changelog/lib/src/gf-changelog-journal-handler.c:275:
stack_use_local_overflow: Local variable "ascii" uses 12288 bytes of
stack space, which exceeds the maximum single use of 10000 bytes.

Error: STACK_USE:
xlators/features/changelog/lib/src/gf-changelog-journal-handler.c:167:
stack_use_local_overflow: Local variable "ascii" uses 12288 bytes of
stack space, which exceeds the maximum single use of 10000 bytes.

Error: STRING_NULL:
xlators/features/changelog/lib/src/gf-changelog-journal-handler.c:589:9:
string_null_sink_parm_call: Passing parameter "from_path" to "open"
which expects a null-terminated string.

Error: UNUSED_VALUE:
xlators/features/changelog/lib/src/gf-history-changelog.c:628:
assigned_value: Assigning value "-1" to "ret" here, but that stored
value is overwritten before it can be used.

Error: STRING_NULL:
xlators/features/changelog/lib/src/gf-history-changelog.c:518:
string_null_argument: Function "sys_pread" does not terminate string
"*ccd->changelog".

BUG: 789278
Change-Id: I1414ec6d4a118ce0c14df4dbe50995c85fe3ecf7
Signed-off-by: Aravinda VK <avishwan@redhat.com>