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Replaced write system function with wrapper gw_write. It allows for generating failures by using telnet commands, fail backendfd, fail clientfd, which are available in debug build only.

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vraatikka
2013-09-17 00:07:56 +03:00
parent db7004e6ae
commit 8bf73ea154
11 changed files with 197 additions and 42 deletions
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19
server/include/dcb.h
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@ -185,19 +185,26 @@ typedef struct dcb {
#endif
} DCB;
#if defined(SS_DEBUG)
unsigned char dcb_fake_write_errno[1024];
__int32_t dcb_fake_write_ev[1024];
bool fail_next_backend_fd;
bool fail_next_client_fd;
#endif
/* A few useful macros */
#define DCB_SESSION(x) (x)->session
#define DCB_PROTOCOL(x, type) (type *)((x)->protocol)
#define DCB_ISZOMBIE(x) ((x)->state == DCB_STATE_ZOMBIE)
int gw_write(int fd, const void* buf, size_t nbytes);
int dcb_write(DCB *, GWBUF *);
DCB *dcb_alloc(dcb_role_t);
void dcb_free(DCB *); /* Free a DCB */
DCB *dcb_connect(struct server *, struct session *, const char *); /* prepare Backend connection */
int dcb_read(DCB *, GWBUF **); /* Generic read routine */
int dcb_write(DCB *, GWBUF *); /* Generic write routine */
int dcb_drain_writeq(DCB *); /* Generic write routine */
void dcb_close(DCB *); /* Generic close functionality */
void dcb_free(DCB *);
DCB *dcb_connect(struct server *, struct session *, const char *);
int dcb_read(DCB *, GWBUF **);
int dcb_drain_writeq(DCB *);
void dcb_close(DCB *);
void dcb_process_zombies(int); /* Process Zombies */
void printAllDCBs(); /* Debug to print all DCB in the system */
void printDCB(DCB *); /* Debug print routine */

2
server/include/gw.h
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@ -59,3 +59,5 @@ int MySQLWrite(DCB *dcb, GWBUF *queue);
int gw_write_backend_event(DCB *dcb);
int gw_read_backend_event(DCB *dcb);
int setnonblocking(int fd);
int gw_write(int fd, const void* buf, size_t nbytes);
int gw_getsockerrno(int fd);