diff options
Diffstat (limited to 'xlators/cluster/afr/src/afr-self-heal-algorithm.c')
| -rw-r--r-- | xlators/cluster/afr/src/afr-self-heal-algorithm.c | 202 |
1 files changed, 158 insertions, 44 deletions
diff --git a/xlators/cluster/afr/src/afr-self-heal-algorithm.c b/xlators/cluster/afr/src/afr-self-heal-algorithm.c index 2ef81b7e0ab..eefd1ff7bb4 100644 --- a/xlators/cluster/afr/src/afr-self-heal-algorithm.c +++ b/xlators/cluster/afr/src/afr-self-heal-algorithm.c @@ -411,18 +411,68 @@ sh_diff_private_cleanup (call_frame_t *frame, xlator_t *this) afr_self_heal_t * sh = NULL; afr_sh_algo_diff_private_t *sh_priv = NULL; + int i; + priv = this->private; local = frame->local; sh = &local->self_heal; sh_priv = sh->private; + for (i = 0; i < priv->data_self_heal_window_size; i++) { + if (sh_priv->loops[i]) { + if (sh_priv->loops[i]->write_needed) + FREE (sh_priv->loops[i]->write_needed); + + if (sh_priv->loops[i]->checksum) + FREE (sh_priv->loops[i]->checksum); + } + } + if (sh_priv) { - if (sh_priv->checksum) - FREE (sh_priv->checksum); + if (sh_priv->loops) + FREE (sh_priv->loops); FREE (sh_priv); } + + +} + + +static uint32_t +__make_cookie (int loop_index, int child_index) +{ + uint32_t ret = (loop_index << 16) | child_index; + return ret; +} + + +static int +__loop_index (uint32_t cookie) +{ + return (cookie & 0xFFFF0000) >> 16; +} + + +static int +__child_index (uint32_t cookie) +{ + return (cookie & 0x0000FFFF); +} + + +static void +sh_diff_loop_state_reset (struct sh_diff_loop_state *loop_state, int child_count) +{ + loop_state->active = _gf_false; +// loop_state->offset = 0; + + memset (loop_state->write_needed, + 0, sizeof (*loop_state->write_needed) * child_count); + + memset (loop_state->checksum, + 0, MD5_DIGEST_LEN * child_count); } @@ -441,13 +491,6 @@ sh_diff_number_of_writes_needed (unsigned char *write_needed, int child_count) } -struct sh_diff_loop_state { - off_t offset; - int32_t child_index; - unsigned char *write_needed; -}; - - static int sh_diff_loop_driver (call_frame_t *frame, xlator_t *this); @@ -475,24 +518,18 @@ sh_diff_loop_return (call_frame_t *rw_frame, xlator_t *this, sh = &sh_local->self_heal; sh_priv = sh->private; + gf_log (this->name, GF_LOG_TRACE, + "loop for offset %"PRId64" returned", loop_state->offset); + LOCK (&sh_priv->lock); { sh_priv->loops_running--; + sh_diff_loop_state_reset (loop_state, priv->child_count); } UNLOCK (&sh_priv->lock); - gf_log (this->name, GF_LOG_TRACE, - "loop for offset %"PRId64" returned", loop_state->offset); - AFR_STACK_DESTROY (rw_frame); - if (loop_state) { - if (loop_state->write_needed) - FREE (loop_state->write_needed); - - FREE (loop_state); - } - sh_diff_loop_driver (sh_frame, this); return 0; @@ -512,9 +549,12 @@ sh_diff_write_cbk (call_frame_t *rw_frame, void *cookie, xlator_t *this, afr_local_t * sh_local = NULL; afr_self_heal_t *sh = NULL; - struct sh_diff_loop_state *loop_state = (struct sh_diff_loop_state *) cookie; + afr_sh_algo_diff_private_t *sh_priv; + struct sh_diff_loop_state *loop_state; - int call_count = 0; + int call_count = 0; + int child_index = 0; + int loop_index = 0; priv = this->private; rw_local = rw_frame->local; @@ -523,10 +563,15 @@ sh_diff_write_cbk (call_frame_t *rw_frame, void *cookie, xlator_t *this, sh_frame = rw_sh->sh_frame; sh_local = sh_frame->local; sh = &sh_local->self_heal; + sh_priv = sh->private; + + child_index = __child_index ((uint32_t) (long) cookie); + loop_index = __loop_index ((uint32_t) (long) cookie); + loop_state = sh_priv->loops[loop_index]; gf_log (this->name, GF_LOG_TRACE, "wrote %d bytes of data from %s to child %d, offset %"PRId64"", - op_ret, sh_local->loc.path, loop_state->child_index, + op_ret, sh_local->loc.path, child_index, loop_state->offset); LOCK (&sh_frame->lock); @@ -535,7 +580,7 @@ sh_diff_write_cbk (call_frame_t *rw_frame, void *cookie, xlator_t *this, gf_log (this->name, GF_LOG_DEBUG, "write to %s failed on subvolume %s (%s)", sh_local->loc.path, - priv->children[loop_state->child_index]->name, + priv->children[child_index]->name, strerror (op_errno)); sh->op_failed = 1; @@ -569,7 +614,10 @@ sh_diff_read_cbk (call_frame_t *rw_frame, void *cookie, afr_local_t * sh_local = NULL; afr_self_heal_t *sh = NULL; - struct sh_diff_loop_state *loop_state = (struct sh_diff_loop_state *) cookie; + int loop_index; + struct sh_diff_loop_state *loop_state; + + uint32_t wcookie; int i = 0; int call_count = 0; @@ -583,6 +631,9 @@ sh_diff_read_cbk (call_frame_t *rw_frame, void *cookie, sh = &sh_local->self_heal; sh_priv = sh->private; + loop_index = __loop_index ((uint32_t) (long) cookie); + loop_state = sh_priv->loops[loop_index]; + call_count = sh_diff_number_of_writes_needed (loop_state->write_needed, priv->child_count); @@ -592,7 +643,8 @@ sh_diff_read_cbk (call_frame_t *rw_frame, void *cookie, "read %d bytes of data from %s, offset %"PRId64"", op_ret, sh_local->loc.path, sh->offset); - if (op_ret <= 0) { + if ((op_ret <= 0) || + (call_count == 0)) { sh_diff_loop_return (rw_frame, this, loop_state); return 0; @@ -608,8 +660,10 @@ sh_diff_read_cbk (call_frame_t *rw_frame, void *cookie, for (i = 0; i < priv->child_count; i++) { if (loop_state->write_needed[i]) { + wcookie = __make_cookie (loop_index, i); + STACK_WIND_COOKIE (rw_frame, sh_diff_write_cbk, - (void *) (long) loop_state, + (void *) (long) wcookie, priv->children[i], priv->children[i]->fops->writev, sh->healing_fd, vector, count, @@ -627,18 +681,21 @@ out: static int sh_diff_read (call_frame_t *rw_frame, xlator_t *this, - struct sh_diff_loop_state *loop_state) + int loop_index) { afr_private_t * priv = NULL; afr_local_t * rw_local = NULL; afr_self_heal_t * rw_sh = NULL; afr_sh_algo_diff_private_t * sh_priv = NULL; + struct sh_diff_loop_state *loop_state; call_frame_t *sh_frame = NULL; afr_local_t * sh_local = NULL; afr_self_heal_t *sh = NULL; + uint32_t cookie; + priv = this->private; rw_local = rw_frame->local; rw_sh = &rw_local->self_heal; @@ -648,8 +705,12 @@ sh_diff_read (call_frame_t *rw_frame, xlator_t *this, sh = &sh_local->self_heal; sh_priv = sh->private; + loop_state = sh_priv->loops[loop_index]; + + cookie = __make_cookie (loop_index, sh->source); + STACK_WIND_COOKIE (rw_frame, sh_diff_read_cbk, - (void *) (long) loop_state, + (void *) (long) cookie, priv->children[sh->source], priv->children[sh->source]->fops->readv, sh->healing_fd, sh_priv->block_size, @@ -674,7 +735,9 @@ sh_diff_checksum_cbk (call_frame_t *rw_frame, void *cookie, xlator_t *this, afr_sh_algo_diff_private_t * sh_priv = NULL; - struct sh_diff_loop_state *loop_state = (struct sh_diff_loop_state *) cookie; + int loop_index = 0; + int child_index = 0; + struct sh_diff_loop_state *loop_state; int call_count = 0; int i = 0; @@ -691,15 +754,20 @@ sh_diff_checksum_cbk (call_frame_t *rw_frame, void *cookie, xlator_t *this, sh_priv = sh->private; + child_index = __child_index ((uint32_t) (long) cookie); + loop_index = __loop_index ((uint32_t) (long) cookie); + + loop_state = sh_priv->loops[loop_index]; + if (op_ret < 0) { gf_log (this->name, GF_LOG_ERROR, "checksum on %s failed on subvolume %s (%s)", - sh_local->loc.path, priv->children[loop_state->child_index]->name, + sh_local->loc.path, priv->children[child_index]->name, strerror (op_errno)); sh->op_failed = 1; } else { - memcpy ((void *) sh_priv->checksum + loop_state->child_index * MD5_DIGEST_LEN, + memcpy (loop_state->checksum + child_index * MD5_DIGEST_LEN, strong_checksum, MD5_DIGEST_LEN); } @@ -711,8 +779,8 @@ sh_diff_checksum_cbk (call_frame_t *rw_frame, void *cookie, xlator_t *this, if (sh->sources[i] || !sh_local->child_up[i]) continue; - if (memcmp ((const void *) sh_priv->checksum + (i * MD5_DIGEST_LEN), - (const void *) sh_priv->checksum + (sh->source * MD5_DIGEST_LEN), + if (memcmp (loop_state->checksum + (i * MD5_DIGEST_LEN), + loop_state->checksum + (sh->source * MD5_DIGEST_LEN), MD5_DIGEST_LEN)) { /* Checksums differ, so this block @@ -737,7 +805,7 @@ sh_diff_checksum_cbk (call_frame_t *rw_frame, void *cookie, xlator_t *this, UNLOCK (&sh_priv->lock); if (write_needed && !sh->op_failed) { - sh_diff_read (rw_frame, this, loop_state); + sh_diff_read (rw_frame, this, loop_index); } else { sh->offset += sh_priv->block_size; @@ -750,6 +818,32 @@ sh_diff_checksum_cbk (call_frame_t *rw_frame, void *cookie, xlator_t *this, static int +sh_diff_find_unused_loop (afr_sh_algo_diff_private_t *sh_priv, int max) +{ + int i; + + LOCK (&sh_priv->lock); + { + for (i = 0; i < max; i++) { + if (sh_priv->loops[i]->active == _gf_false) { + sh_priv->loops[i]->active = _gf_true; + break; + } + } + } + UNLOCK (&sh_priv->lock); + + if (i == max) { + gf_log ("[sh-diff]", GF_LOG_ERROR, + "no free loops found! This shouldn't happen. Please" + " report this to gluster-devel@nongnu.org"); + } + + return i; +} + + +static int sh_diff_checksum (call_frame_t *frame, xlator_t *this, off_t offset) { afr_private_t * priv = NULL; @@ -762,6 +856,8 @@ sh_diff_checksum (call_frame_t *frame, xlator_t *this, off_t offset) call_frame_t *rw_frame = NULL; + uint32_t cookie; + int loop_index = 0; struct sh_diff_loop_state *loop_state = NULL; int32_t op_errno = 0; @@ -791,29 +887,35 @@ sh_diff_checksum (call_frame_t *frame, xlator_t *this, off_t offset) rw_local->call_count = call_count; - loop_state = CALLOC (1, sizeof (*loop_state)); - loop_state->child_index = sh->source; + loop_index = sh_diff_find_unused_loop (sh_priv, priv->data_self_heal_window_size); + + loop_state = sh_priv->loops[loop_index]; loop_state->offset = offset; - loop_state->write_needed = CALLOC (priv->child_count, - sizeof (*loop_state->write_needed)); + + /* we need to send both the loop index and child index, + so squeeze them both into a 32-bit number */ + + cookie = __make_cookie (loop_index, sh->source); STACK_WIND_COOKIE (rw_frame, sh_diff_checksum_cbk, - (void *) (long) loop_state, + (void *) (long) cookie, priv->children[sh->source], priv->children[sh->source]->fops->rchecksum, sh->healing_fd, - sh->offset, sh_priv->block_size); + offset, sh_priv->block_size); for (i = 0; i < priv->child_count; i++) { if (sh->sources[i] || !local->child_up[i]) continue; + cookie = __make_cookie (loop_index, i); + STACK_WIND_COOKIE (rw_frame, sh_diff_checksum_cbk, - (void *) (long) loop_state, + (void *) (long) cookie, priv->children[i], priv->children[i]->fops->rchecksum, sh->healing_fd, - sh->offset, sh_priv->block_size); + offset, sh_priv->block_size); if (!--call_count) break; @@ -926,14 +1028,14 @@ afr_sh_algo_diff (call_frame_t *frame, xlator_t *this) afr_self_heal_t * sh = NULL; afr_sh_algo_diff_private_t *sh_priv = NULL; + int i; + priv = this->private; local = frame->local; sh = &local->self_heal; sh_priv = CALLOC (1, sizeof (*sh_priv)); - sh_priv->checksum = CALLOC (priv->child_count, MD5_DIGEST_LEN); - sh_priv->block_size = this->ctx->page_size; sh->private = sh_priv; @@ -942,6 +1044,18 @@ afr_sh_algo_diff (call_frame_t *frame, xlator_t *this) local->call_count = 0; + sh_priv->loops = CALLOC (priv->data_self_heal_window_size, + sizeof (*sh_priv->loops)); + + for (i = 0; i < priv->data_self_heal_window_size; i++) { + sh_priv->loops[i] = CALLOC (1, sizeof (*sh_priv->loops[i])); + + sh_priv->loops[i]->checksum = CALLOC (priv->child_count, + MD5_DIGEST_LEN); + sh_priv->loops[i]->write_needed = CALLOC (priv->child_count, + sizeof (*sh_priv->loops[i]->write_needed)); + } + sh_diff_loop_driver (frame, this); return 0; |