version 1.1, 2013/10/14 10:32:47
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version 1.1.1.2, 2016/11/02 10:35:00
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#include "first.h" |
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/** |
/** |
* the network chunk-API |
* the network chunk-API |
* |
* |
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*/ |
*/ |
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#include "chunk.h" |
#include "chunk.h" |
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#include "base.h" |
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#include "log.h" |
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#include <sys/types.h> |
#include <sys/types.h> |
#include <sys/stat.h> |
#include <sys/stat.h> |
#include <sys/mman.h> | #include "sys-mmap.h" |
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#include <stdlib.h> |
#include <stdlib.h> |
#include <fcntl.h> |
#include <fcntl.h> |
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#include <errno.h> |
#include <errno.h> |
#include <string.h> |
#include <string.h> |
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/* default 1MB, upper limit 128MB */ |
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#define DEFAULT_TEMPFILE_SIZE (1 * 1024 * 1024) |
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#define MAX_TEMPFILE_SIZE (128 * 1024 * 1024) |
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static array *chunkqueue_default_tempdirs = NULL; |
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static unsigned int chunkqueue_default_tempfile_size = DEFAULT_TEMPFILE_SIZE; |
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chunkqueue *chunkqueue_init(void) { |
chunkqueue *chunkqueue_init(void) { |
chunkqueue *cq; |
chunkqueue *cq; |
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cq = calloc(1, sizeof(*cq)); |
cq = calloc(1, sizeof(*cq)); |
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force_assert(NULL != cq); |
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cq->first = NULL; |
cq->first = NULL; |
cq->last = NULL; |
cq->last = NULL; |
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cq->unused = NULL; |
cq->unused = NULL; |
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cq->tempdirs = chunkqueue_default_tempdirs; |
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cq->upload_temp_file_size = chunkqueue_default_tempfile_size; |
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return cq; |
return cq; |
} |
} |
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Line 35 static chunk *chunk_init(void) {
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Line 50 static chunk *chunk_init(void) {
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chunk *c; |
chunk *c; |
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c = calloc(1, sizeof(*c)); |
c = calloc(1, sizeof(*c)); |
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force_assert(NULL != c); |
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c->type = MEM_CHUNK; |
c->mem = buffer_init(); |
c->mem = buffer_init(); |
c->file.name = buffer_init(); |
c->file.name = buffer_init(); |
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c->file.start = c->file.length = c->file.mmap.offset = 0; |
c->file.fd = -1; |
c->file.fd = -1; |
c->file.mmap.start = MAP_FAILED; |
c->file.mmap.start = MAP_FAILED; |
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c->file.mmap.length = 0; |
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c->file.is_temp = 0; |
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c->offset = 0; |
c->next = NULL; |
c->next = NULL; |
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return c; |
return c; |
} |
} |
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static void chunk_free(chunk *c) { |
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if (!c) return; |
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buffer_free(c->mem); |
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buffer_free(c->file.name); |
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free(c); |
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} |
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static void chunk_reset(chunk *c) { |
static void chunk_reset(chunk *c) { |
if (!c) return; | if (NULL == c) return; |
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c->type = MEM_CHUNK; |
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buffer_reset(c->mem); |
buffer_reset(c->mem); |
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if (c->file.is_temp && !buffer_is_empty(c->file.name)) { | if (c->file.is_temp && !buffer_string_is_empty(c->file.name)) { |
unlink(c->file.name->ptr); |
unlink(c->file.name->ptr); |
} |
} |
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Line 73 static void chunk_reset(chunk *c) {
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Line 87 static void chunk_reset(chunk *c) {
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munmap(c->file.mmap.start, c->file.mmap.length); |
munmap(c->file.mmap.start, c->file.mmap.length); |
c->file.mmap.start = MAP_FAILED; |
c->file.mmap.start = MAP_FAILED; |
} |
} |
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c->file.start = c->file.length = c->file.mmap.offset = 0; |
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c->file.mmap.length = 0; |
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c->file.is_temp = 0; |
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c->offset = 0; |
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c->next = NULL; |
} |
} |
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static void chunk_free(chunk *c) { |
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if (NULL == c) return; |
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chunk_reset(c); |
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buffer_free(c->mem); |
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buffer_free(c->file.name); |
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free(c); |
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} |
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static off_t chunk_remaining_length(const chunk *c) { |
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off_t len = 0; |
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switch (c->type) { |
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case MEM_CHUNK: |
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len = buffer_string_length(c->mem); |
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break; |
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case FILE_CHUNK: |
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len = c->file.length; |
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break; |
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default: |
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force_assert(c->type == MEM_CHUNK || c->type == FILE_CHUNK); |
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break; |
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} |
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force_assert(c->offset <= len); |
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return len - c->offset; |
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} |
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void chunkqueue_free(chunkqueue *cq) { |
void chunkqueue_free(chunkqueue *cq) { |
chunk *c, *pc; |
chunk *c, *pc; |
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if (!cq) return; | if (NULL == cq) return; |
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for (c = cq->first; c; ) { |
for (c = cq->first; c; ) { |
pc = c; |
pc = c; |
Line 96 void chunkqueue_free(chunkqueue *cq) {
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Line 142 void chunkqueue_free(chunkqueue *cq) {
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free(cq); |
free(cq); |
} |
} |
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static void chunkqueue_push_unused_chunk(chunkqueue *cq, chunk *c) { |
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force_assert(NULL != cq && NULL != c); |
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/* keep at max 4 chunks in the 'unused'-cache */ |
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if (cq->unused_chunks > 4) { |
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chunk_free(c); |
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} else { |
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chunk_reset(c); |
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c->next = cq->unused; |
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cq->unused = c; |
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cq->unused_chunks++; |
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} |
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} |
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static chunk *chunkqueue_get_unused_chunk(chunkqueue *cq) { |
static chunk *chunkqueue_get_unused_chunk(chunkqueue *cq) { |
chunk *c; |
chunk *c; |
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force_assert(NULL != cq); |
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/* check if we have a unused chunk */ |
/* check if we have a unused chunk */ |
if (!cq->unused) { | if (0 == cq->unused) { |
c = chunk_init(); |
c = chunk_init(); |
} else { |
} else { |
/* take the first element from the list (a stack) */ |
/* take the first element from the list (a stack) */ |
Line 113 static chunk *chunkqueue_get_unused_chunk(chunkqueue *
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Line 175 static chunk *chunkqueue_get_unused_chunk(chunkqueue *
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return c; |
return c; |
} |
} |
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static int chunkqueue_prepend_chunk(chunkqueue *cq, chunk *c) { | static void chunkqueue_prepend_chunk(chunkqueue *cq, chunk *c) { |
c->next = cq->first; |
c->next = cq->first; |
cq->first = c; |
cq->first = c; |
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if (cq->last == NULL) { | if (NULL == cq->last) { |
cq->last = c; |
cq->last = c; |
} |
} |
| cq->bytes_in += chunk_remaining_length(c); |
return 0; | |
} |
} |
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static int chunkqueue_append_chunk(chunkqueue *cq, chunk *c) { | static void chunkqueue_append_chunk(chunkqueue *cq, chunk *c) { |
| c->next = NULL; |
if (cq->last) { |
if (cq->last) { |
cq->last->next = c; |
cq->last->next = c; |
} |
} |
cq->last = c; |
cq->last = c; |
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if (cq->first == NULL) { | if (NULL == cq->first) { |
cq->first = c; |
cq->first = c; |
} |
} |
| cq->bytes_in += chunk_remaining_length(c); |
return 0; | |
} |
} |
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void chunkqueue_reset(chunkqueue *cq) { |
void chunkqueue_reset(chunkqueue *cq) { |
chunk *c; | chunk *cur = cq->first; |
/* move everything to the unused queue */ | |
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/* mark all read written */ | cq->first = cq->last = NULL; |
for (c = cq->first; c; c = c->next) { | |
switch(c->type) { | while (NULL != cur) { |
case MEM_CHUNK: | chunk *next = cur->next; |
c->offset = c->mem->used - 1; | chunkqueue_push_unused_chunk(cq, cur); |
break; | cur = next; |
case FILE_CHUNK: | |
c->offset = c->file.length; | |
break; | |
default: | |
break; | |
} | |
} |
} |
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chunkqueue_remove_finished_chunks(cq); |
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cq->bytes_in = 0; |
cq->bytes_in = 0; |
cq->bytes_out = 0; |
cq->bytes_out = 0; |
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cq->tempdir_idx = 0; |
} |
} |
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int chunkqueue_append_file(chunkqueue *cq, buffer *fn, off_t offset, off_t len) { | void chunkqueue_append_file_fd(chunkqueue *cq, buffer *fn, int fd, off_t offset, off_t len) { |
chunk *c; |
chunk *c; |
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if (len == 0) return 0; | if (0 == len) { |
| close(fd); |
| return; |
| } |
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c = chunkqueue_get_unused_chunk(cq); |
c = chunkqueue_get_unused_chunk(cq); |
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c->type = FILE_CHUNK; |
c->type = FILE_CHUNK; |
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buffer_copy_string_buffer(c->file.name, fn); | buffer_copy_buffer(c->file.name, fn); |
c->file.start = offset; |
c->file.start = offset; |
c->file.length = len; |
c->file.length = len; |
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c->file.fd = fd; |
c->offset = 0; |
c->offset = 0; |
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chunkqueue_append_chunk(cq, c); |
chunkqueue_append_chunk(cq, c); |
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return 0; |
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} |
} |
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int chunkqueue_append_buffer(chunkqueue *cq, buffer *mem) { | void chunkqueue_append_file(chunkqueue *cq, buffer *fn, off_t offset, off_t len) { |
chunk *c; |
chunk *c; |
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if (mem->used == 0) return 0; | if (0 == len) return; |
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c = chunkqueue_get_unused_chunk(cq); |
c = chunkqueue_get_unused_chunk(cq); |
c->type = MEM_CHUNK; | |
| c->type = FILE_CHUNK; |
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| buffer_copy_buffer(c->file.name, fn); |
| c->file.start = offset; |
| c->file.length = len; |
c->offset = 0; |
c->offset = 0; |
buffer_copy_string_buffer(c->mem, mem); |
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chunkqueue_append_chunk(cq, c); |
chunkqueue_append_chunk(cq, c); |
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return 0; |
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} |
} |
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int chunkqueue_append_buffer_weak(chunkqueue *cq, buffer *mem) { | void chunkqueue_append_buffer(chunkqueue *cq, buffer *mem) { |
chunk *c; |
chunk *c; |
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if (buffer_string_is_empty(mem)) return; |
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c = chunkqueue_get_unused_chunk(cq); |
c = chunkqueue_get_unused_chunk(cq); |
c->type = MEM_CHUNK; |
c->type = MEM_CHUNK; |
c->offset = 0; | force_assert(NULL != c->mem); |
if (c->mem) buffer_free(c->mem); | buffer_move(c->mem, mem); |
c->mem = mem; | |
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chunkqueue_append_chunk(cq, c); |
chunkqueue_append_chunk(cq, c); |
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return 0; |
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} |
} |
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int chunkqueue_prepend_buffer(chunkqueue *cq, buffer *mem) { | void chunkqueue_prepend_buffer(chunkqueue *cq, buffer *mem) { |
chunk *c; |
chunk *c; |
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if (mem->used == 0) return 0; | if (buffer_string_is_empty(mem)) return; |
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c = chunkqueue_get_unused_chunk(cq); |
c = chunkqueue_get_unused_chunk(cq); |
c->type = MEM_CHUNK; |
c->type = MEM_CHUNK; |
c->offset = 0; | force_assert(NULL != c->mem); |
buffer_copy_string_buffer(c->mem, mem); | buffer_move(c->mem, mem); |
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chunkqueue_prepend_chunk(cq, c); |
chunkqueue_prepend_chunk(cq, c); |
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return 0; |
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} |
} |
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int chunkqueue_append_mem(chunkqueue *cq, const char * mem, size_t len) { | void chunkqueue_append_mem(chunkqueue *cq, const char * mem, size_t len) { |
chunk *c; |
chunk *c; |
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if (len == 0) return 0; | if (0 == len) return; |
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c = chunkqueue_get_unused_chunk(cq); |
c = chunkqueue_get_unused_chunk(cq); |
c->type = MEM_CHUNK; |
c->type = MEM_CHUNK; |
c->offset = 0; | buffer_copy_string_len(c->mem, mem, len); |
buffer_copy_string_len(c->mem, mem, len - 1); | |
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chunkqueue_append_chunk(cq, c); |
chunkqueue_append_chunk(cq, c); |
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} |
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return 0; | |
| void chunkqueue_append_chunkqueue(chunkqueue *cq, chunkqueue *src) { |
| if (src == NULL || NULL == src->first) return; |
| |
| if (NULL == cq->first) { |
| cq->first = src->first; |
| } else { |
| cq->last->next = src->first; |
| } |
| cq->last = src->last; |
| cq->bytes_in += (src->bytes_in - src->bytes_out); |
| |
| src->first = NULL; |
| src->last = NULL; |
| src->bytes_out = src->bytes_in; |
} |
} |
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buffer * chunkqueue_get_prepend_buffer(chunkqueue *cq) { | |
| void chunkqueue_get_memory(chunkqueue *cq, char **mem, size_t *len, size_t min_size, size_t alloc_size) { |
| static const size_t REALLOC_MAX_SIZE = 256; |
chunk *c; |
chunk *c; |
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buffer *b; |
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char *dummy_mem; |
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size_t dummy_len; |
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c = chunkqueue_get_unused_chunk(cq); | force_assert(NULL != cq); |
| if (NULL == mem) mem = &dummy_mem; |
| if (NULL == len) len = &dummy_len; |
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c->type = MEM_CHUNK; | /* default values: */ |
c->offset = 0; | if (0 == min_size) min_size = 1024; |
buffer_reset(c->mem); | if (0 == alloc_size) alloc_size = 4096; |
| if (alloc_size < min_size) alloc_size = min_size; |
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chunkqueue_prepend_chunk(cq, c); | if (NULL != cq->last && MEM_CHUNK == cq->last->type) { |
| size_t have; |
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return c->mem; | b = cq->last->mem; |
} | have = buffer_string_space(b); |
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buffer *chunkqueue_get_append_buffer(chunkqueue *cq) { | /* unused buffer: allocate space */ |
chunk *c; | if (buffer_string_is_empty(b)) { |
| buffer_string_prepare_copy(b, alloc_size); |
| have = buffer_string_space(b); |
| } |
| /* if buffer is really small just make it bigger */ |
| else if (have < min_size && b->size <= REALLOC_MAX_SIZE) { |
| size_t cur_len = buffer_string_length(b); |
| size_t new_size = cur_len + min_size, append; |
| if (new_size < alloc_size) new_size = alloc_size; |
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c = chunkqueue_get_unused_chunk(cq); | append = new_size - cur_len; |
| if (append >= min_size) { |
| buffer_string_prepare_append(b, append); |
| have = buffer_string_space(b); |
| } |
| } |
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c->type = MEM_CHUNK; | /* return pointer into existing buffer if large enough */ |
c->offset = 0; | if (have >= min_size) { |
buffer_reset(c->mem); | *mem = b->ptr + buffer_string_length(b); |
| *len = have; |
| return; |
| } |
| } |
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/* allocate new chunk */ |
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c = chunkqueue_get_unused_chunk(cq); |
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c->type = MEM_CHUNK; |
chunkqueue_append_chunk(cq, c); |
chunkqueue_append_chunk(cq, c); |
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return c->mem; | b = c->mem; |
| buffer_string_prepare_append(b, alloc_size); |
| |
| *mem = b->ptr + buffer_string_length(b); |
| *len = buffer_string_space(b); |
} |
} |
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int chunkqueue_set_tempdirs(chunkqueue *cq, array *tempdirs) { | void chunkqueue_use_memory(chunkqueue *cq, size_t len) { |
if (!cq) return -1; | buffer *b; |
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force_assert(NULL != cq); |
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force_assert(NULL != cq->last && MEM_CHUNK == cq->last->type); |
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b = cq->last->mem; |
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if (len > 0) { |
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buffer_commit(b, len); |
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cq->bytes_in += len; |
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} else if (buffer_string_is_empty(b)) { |
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/* unused buffer: can't remove chunk easily from |
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* end of list, so just reset the buffer |
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*/ |
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buffer_reset(b); |
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} |
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} |
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void chunkqueue_set_tempdirs_default (array *tempdirs, unsigned int upload_temp_file_size) { |
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chunkqueue_default_tempdirs = tempdirs; |
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chunkqueue_default_tempfile_size |
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= (0 == upload_temp_file_size) ? DEFAULT_TEMPFILE_SIZE |
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: (upload_temp_file_size > MAX_TEMPFILE_SIZE) ? MAX_TEMPFILE_SIZE |
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: upload_temp_file_size; |
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} |
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#if 0 |
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void chunkqueue_set_tempdirs(chunkqueue *cq, array *tempdirs, unsigned int upload_temp_file_size) { |
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force_assert(NULL != cq); |
cq->tempdirs = tempdirs; |
cq->tempdirs = tempdirs; |
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cq->upload_temp_file_size |
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= (0 == upload_temp_file_size) ? DEFAULT_TEMPFILE_SIZE |
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: (upload_temp_file_size > MAX_TEMPFILE_SIZE) ? MAX_TEMPFILE_SIZE |
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: upload_temp_file_size; |
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cq->tempdir_idx = 0; |
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} |
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#endif |
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return 0; | void chunkqueue_steal(chunkqueue *dest, chunkqueue *src, off_t len) { |
| while (len > 0) { |
| chunk *c = src->first; |
| off_t clen = 0, use; |
| |
| if (NULL == c) break; |
| |
| clen = chunk_remaining_length(c); |
| if (0 == clen) { |
| /* drop empty chunk */ |
| src->first = c->next; |
| if (c == src->last) src->last = NULL; |
| chunkqueue_push_unused_chunk(src, c); |
| continue; |
| } |
| |
| use = len >= clen ? clen : len; |
| len -= use; |
| |
| if (use == clen) { |
| /* move complete chunk */ |
| src->first = c->next; |
| if (c == src->last) src->last = NULL; |
| |
| chunkqueue_append_chunk(dest, c); |
| } else { |
| /* partial chunk with length "use" */ |
| |
| switch (c->type) { |
| case MEM_CHUNK: |
| chunkqueue_append_mem(dest, c->mem->ptr + c->offset, use); |
| break; |
| case FILE_CHUNK: |
| /* tempfile flag is in "last" chunk after the split */ |
| chunkqueue_append_file(dest, c->file.name, c->file.start + c->offset, use); |
| break; |
| } |
| |
| c->offset += use; |
| force_assert(0 == len); |
| } |
| |
| src->bytes_out += use; |
| } |
} |
} |
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chunk *chunkqueue_get_append_tempfile(chunkqueue *cq) { | static chunk *chunkqueue_get_append_tempfile(chunkqueue *cq) { |
chunk *c; |
chunk *c; |
buffer *template = buffer_init_string("/var/tmp/lighttpd-upload-XXXXXX"); |
buffer *template = buffer_init_string("/var/tmp/lighttpd-upload-XXXXXX"); |
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int fd = -1; |
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c = chunkqueue_get_unused_chunk(cq); |
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c->type = FILE_CHUNK; |
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c->offset = 0; |
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if (cq->tempdirs && cq->tempdirs->used) { |
if (cq->tempdirs && cq->tempdirs->used) { |
size_t i; |
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/* we have several tempdirs, only if all of them fail we jump out */ |
/* we have several tempdirs, only if all of them fail we jump out */ |
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for (i = 0; i < cq->tempdirs->used; i++) { | for (errno = EIO; cq->tempdir_idx < cq->tempdirs->used; ++cq->tempdir_idx) { |
data_string *ds = (data_string *)cq->tempdirs->data[i]; | data_string *ds = (data_string *)cq->tempdirs->data[cq->tempdir_idx]; |
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buffer_copy_string_buffer(template, ds->value); | buffer_copy_buffer(template, ds->value); |
BUFFER_APPEND_SLASH(template); | buffer_append_slash(template); |
buffer_append_string_len(template, CONST_STR_LEN("lighttpd-upload-XXXXXX")); |
buffer_append_string_len(template, CONST_STR_LEN("lighttpd-upload-XXXXXX")); |
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if (-1 != (c->file.fd = mkstemp(template->ptr))) { | if (-1 != (fd = mkstemp(template->ptr))) break; |
/* only trigger the unlink if we created the temp-file successfully */ | |
c->file.is_temp = 1; | |
break; | |
} | |
} |
} |
} else { |
} else { |
if (-1 != (c->file.fd = mkstemp(template->ptr))) { | fd = mkstemp(template->ptr); |
/* only trigger the unlink if we created the temp-file successfully */ | |
c->file.is_temp = 1; | |
} | |
} |
} |
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buffer_copy_string_buffer(c->file.name, template); | if (fd < 0) { |
| buffer_free(template); |
| return NULL; |
| } |
| |
| c = chunkqueue_get_unused_chunk(cq); |
| c->type = FILE_CHUNK; |
| c->file.fd = fd; |
| c->file.is_temp = 1; |
| buffer_copy_buffer(c->file.name, template); |
c->file.length = 0; |
c->file.length = 0; |
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chunkqueue_append_chunk(cq, c); |
chunkqueue_append_chunk(cq, c); |
Line 319 chunk *chunkqueue_get_append_tempfile(chunkqueue *cq)
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Line 493 chunk *chunkqueue_get_append_tempfile(chunkqueue *cq)
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return c; |
return c; |
} |
} |
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static void chunkqueue_remove_empty_chunks(chunkqueue *cq); |
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off_t chunkqueue_length(chunkqueue *cq) { | int chunkqueue_append_mem_to_tempfile(server *srv, chunkqueue *dest, const char *mem, size_t len) { |
off_t len = 0; | chunk *dst_c; |
chunk *c; | ssize_t written; |
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for (c = cq->first; c; c = c->next) { | do { |
| /* |
| * if the last chunk is |
| * - smaller than dest->upload_temp_file_size |
| * - not read yet (offset == 0) |
| * -> append to it (so it might actually become larger than dest->upload_temp_file_size) |
| * otherwise |
| * -> create a new chunk |
| * |
| * */ |
| |
| dst_c = dest->last; |
| if (NULL != dst_c |
| && FILE_CHUNK == dst_c->type |
| && dst_c->file.is_temp |
| && dst_c->file.fd >= 0 |
| && 0 == dst_c->offset) { |
| /* ok, take the last chunk for our job */ |
| |
| if (dst_c->file.length >= (off_t)dest->upload_temp_file_size) { |
| /* the chunk is too large now, close it */ |
| int rc = close(dst_c->file.fd); |
| dst_c->file.fd = -1; |
| if (0 != rc) { |
| log_error_write(srv, __FILE__, __LINE__, "sbss", |
| "close() temp-file", dst_c->file.name, "failed:", |
| strerror(errno)); |
| return -1; |
| } |
| dst_c = NULL; |
| } |
| } else { |
| dst_c = NULL; |
| } |
| |
| if (NULL == dst_c && NULL == (dst_c = chunkqueue_get_append_tempfile(dest))) { |
| /* we don't have file to write to, |
| * EACCES might be one reason. |
| * |
| * Instead of sending 500 we send 413 and say the request is too large |
| */ |
| |
| log_error_write(srv, __FILE__, __LINE__, "ss", |
| "opening temp-file failed:", strerror(errno)); |
| |
| return -1; |
| } |
| |
| written = write(dst_c->file.fd, mem, len); |
| |
| if ((size_t) written == len) { |
| dst_c->file.length += len; |
| dest->bytes_in += len; |
| |
| return 0; |
| } else if (written >= 0) { |
| /*(assume EINTR if partial write and retry write(); |
| * retry write() might fail with ENOSPC if no more space on volume)*/ |
| dest->bytes_in += written; |
| mem += written; |
| len -= (size_t)written; |
| dst_c->file.length += (size_t)written; |
| /* continue; retry */ |
| } else if (errno == EINTR) { |
| /* continue; retry */ |
| } else { |
| int retry = (errno == ENOSPC && dest->tempdirs && ++dest->tempdir_idx < dest->tempdirs->used); |
| if (!retry) { |
| log_error_write(srv, __FILE__, __LINE__, "sbs", |
| "write() temp-file", dst_c->file.name, "failed:", |
| strerror(errno)); |
| } |
| |
| if (0 == chunk_remaining_length(dst_c)) { |
| /*(remove empty chunk and unlink tempfile)*/ |
| chunkqueue_remove_empty_chunks(dest); |
| } else {/*(close tempfile; avoid later attempts to append)*/ |
| int rc = close(dst_c->file.fd); |
| dst_c->file.fd = -1; |
| if (0 != rc) { |
| log_error_write(srv, __FILE__, __LINE__, "sbss", |
| "close() temp-file", dst_c->file.name, "failed:", |
| strerror(errno)); |
| return -1; |
| } |
| } |
| if (!retry) return -1; |
| |
| /* continue; retry */ |
| } |
| |
| } while (dst_c); |
| |
| return -1; /*(not reached)*/ |
| } |
| |
| int chunkqueue_steal_with_tempfiles(server *srv, chunkqueue *dest, chunkqueue *src, off_t len) { |
| while (len > 0) { |
| chunk *c = src->first; |
| off_t clen = 0, use; |
| |
| if (NULL == c) break; |
| |
| clen = chunk_remaining_length(c); |
| if (0 == clen) { |
| /* drop empty chunk */ |
| src->first = c->next; |
| if (c == src->last) src->last = NULL; |
| chunkqueue_push_unused_chunk(src, c); |
| continue; |
| } |
| |
| use = (len >= clen) ? clen : len; |
| len -= use; |
| |
switch (c->type) { |
switch (c->type) { |
case MEM_CHUNK: |
|
len += c->mem->used ? c->mem->used - 1 : 0; |
|
break; |
|
case FILE_CHUNK: |
case FILE_CHUNK: |
len += c->file.length; | if (use == clen) { |
| /* move complete chunk */ |
| src->first = c->next; |
| if (c == src->last) src->last = NULL; |
| chunkqueue_append_chunk(dest, c); |
| } else { |
| /* partial chunk with length "use" */ |
| /* tempfile flag is in "last" chunk after the split */ |
| chunkqueue_append_file(dest, c->file.name, c->file.start + c->offset, use); |
| |
| c->offset += use; |
| force_assert(0 == len); |
| } |
break; |
break; |
default: | |
| case MEM_CHUNK: |
| /* store "use" bytes from memory chunk in tempfile */ |
| if (0 != chunkqueue_append_mem_to_tempfile(srv, dest, c->mem->ptr + c->offset, use)) { |
| return -1; |
| } |
| |
| if (use == clen) { |
| /* finished chunk */ |
| src->first = c->next; |
| if (c == src->last) src->last = NULL; |
| chunkqueue_push_unused_chunk(src, c); |
| } else { |
| /* partial chunk */ |
| c->offset += use; |
| force_assert(0 == len); |
| } |
break; |
break; |
} |
} |
|
|
|
src->bytes_out += use; |
} |
} |
|
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return len; | return 0; |
} |
} |
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off_t chunkqueue_written(chunkqueue *cq) { | off_t chunkqueue_length(chunkqueue *cq) { |
off_t len = 0; |
off_t len = 0; |
chunk *c; |
chunk *c; |
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for (c = cq->first; c; c = c->next) { |
for (c = cq->first; c; c = c->next) { |
switch (c->type) { | len += chunk_remaining_length(c); |
case MEM_CHUNK: | |
case FILE_CHUNK: | |
len += c->offset; | |
break; | |
default: | |
break; | |
} | |
} |
} |
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return len; |
return len; |
} |
} |
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int chunkqueue_is_empty(chunkqueue *cq) { |
int chunkqueue_is_empty(chunkqueue *cq) { |
return cq->first ? 0 : 1; | return NULL == cq->first; |
} |
} |
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int chunkqueue_remove_finished_chunks(chunkqueue *cq) { | void chunkqueue_mark_written(chunkqueue *cq, off_t len) { |
| off_t written = len; |
chunk *c; |
chunk *c; |
|
force_assert(len >= 0); |
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for (c = cq->first; c; c = cq->first) { | for (c = cq->first; NULL != c; c = cq->first) { |
int is_finished = 0; | off_t c_len = chunk_remaining_length(c); |
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switch (c->type) { | if (0 == written && 0 != c_len) break; /* no more finished chunks */ |
case MEM_CHUNK: | |
if (c->mem->used == 0 || (c->offset == (off_t)c->mem->used - 1)) is_finished = 1; | if (written >= c_len) { /* chunk got finished */ |
break; | c->offset += c_len; |
case FILE_CHUNK: | written -= c_len; |
if (c->offset == c->file.length) is_finished = 1; | |
break; | cq->first = c->next; |
default: | if (c == cq->last) cq->last = NULL; |
break; | |
| chunkqueue_push_unused_chunk(cq, c); |
| } else { /* partial chunk */ |
| c->offset += written; |
| written = 0; |
| break; /* chunk not finished */ |
} |
} |
|
} |
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if (!is_finished) break; | force_assert(0 == written); |
| cq->bytes_out += len; |
| } |
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chunk_reset(c); | void chunkqueue_remove_finished_chunks(chunkqueue *cq) { |
| chunk *c; |
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for (c = cq->first; c; c = cq->first) { |
|
if (0 != chunk_remaining_length(c)) break; /* not finished yet */ |
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cq->first = c->next; |
cq->first = c->next; |
if (c == cq->last) cq->last = NULL; |
if (c == cq->last) cq->last = NULL; |
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/* keep at max 4 chunks in the 'unused'-cache */ | chunkqueue_push_unused_chunk(cq, c); |
if (cq->unused_chunks > 4) { | |
chunk_free(c); | |
} else { | |
c->next = cq->unused; | |
cq->unused = c; | |
cq->unused_chunks++; | |
} | |
} |
} |
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} |
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return 0; | static void chunkqueue_remove_empty_chunks(chunkqueue *cq) { |
| chunk *c; |
| chunkqueue_remove_finished_chunks(cq); |
| if (chunkqueue_is_empty(cq)) return; |
| |
| for (c = cq->first; c->next; c = c->next) { |
| if (0 == chunk_remaining_length(c->next)) { |
| chunk *empty = c->next; |
| c->next = empty->next; |
| if (empty == cq->last) cq->last = c; |
| |
| chunkqueue_push_unused_chunk(cq, empty); |
| } |
| } |
} |
} |