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set MR bits on newly-created files.

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swap MR bits on file after a R-W-T event (after a read,
the read event is cleared and the write/truncate bits are set; after
a write, the write bit is clear and the read bit is set).
This commit is contained in:
Dean Roehrich
2002-05-06 15:52:40 +00:00
parent f29425d6f7
commit 5dd4638922
1 changed files with 66 additions and 3 deletions
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dmapi/src/suite1/cmd/print_event.c
+66 -3
View File
@@ -57,6 +57,14 @@ int finish_responding(dm_sessid_t);
int establish_handler(void);
void exit_handler (int);
static int
clear_region_event(
dm_sessid_t sid,
u_int event,
void *hanp,
size_t hlen,
char *hans1);
#define MAXNAMELEN 256
/*
@@ -69,13 +77,17 @@ dm_sessid_t sid = 0;
dm_sessid_t oldsid = 0;
char *fsname;
int register_new_mnts = 0;
int rwt_bit_clear = 1; /* Clear read/write/trunc bit before
* responding to event; reset all other
* bits.
*/
void
usage(
char *prog)
{
fprintf(stderr, "Usage: %s ", prog);
fprintf(stderr, " <-S oldsid> <-v> <-s sleep> <-R> ");
fprintf(stderr, " <-S oldsid> <-v> <-s sleep> <-R> <-N> ");
fprintf(stderr, "filesystem \n");
}
@@ -95,7 +107,7 @@ main(
/* Progname = argv[0];*/ Progname = "print_event";
fsname = NULL;
while ((c = getopt(argc, argv, "vs:S:R")) != EOF) {
while ((c = getopt(argc, argv, "vs:S:RN")) != EOF) {
switch (c) {
case 's':
Sleep = atoi(optarg);
@@ -103,6 +115,9 @@ main(
case 'R':
register_new_mnts = 1;
break;
case 'N':
rwt_bit_clear = 0;
break;
case 'S':
oldsid = atoi(optarg);
break;
@@ -445,6 +460,22 @@ handle_message(
hlen1 = DM_GET_LEN (msg_de, de_handle);
if (hanp1 && hlen1) {
hantoa(hanp1, hlen1, hans1);
if (rwt_bit_clear) {
u_int rgflag;
switch(msg->ev_type) {
/* DM_EVENT_* and DM_REGION_* are different values, ug */
case DM_EVENT_READ:
rgflag = DM_REGION_READ;
break;
case DM_EVENT_WRITE:
rgflag = DM_REGION_WRITE;
break;
case DM_EVENT_TRUNCATE:
rgflag = DM_REGION_TRUNCATE;
break;
}
clear_region_event(sid, rgflag, hanp1, hlen1, hans1);
}
} else {
sprintf(hans1, "<BAD HANDLE, hlen %d>", hlen1);
}
@@ -476,7 +507,7 @@ handle_message(
break;
default: break;
}
}
} /* RWT */
/***** DESTROY EVENT *****/
@@ -645,6 +676,7 @@ handle_message(
"mode bits", type,
"retcode", msg_ne->ne_retcode);
respond = 0;
clear_region_event(sid, 0, hanp2, hlen2, hans2);
break;
case DM_EVENT_REMOVE:
@@ -1057,6 +1089,37 @@ clear_events(
}
static int
clear_region_event(
dm_sessid_t sid,
u_int event,
void *hanp,
size_t hlen,
char *hans1)
{
dm_region_t region = { 0, 0, 0 };
u_int nelem = 1;
u_int exactflag;
region.rg_flags = DM_REGION_READ|DM_REGION_WRITE|DM_REGION_TRUNCATE;
region.rg_flags &= ~event;
if (Verbose) {
err_msg("Clearing region mask 0x%x for file %s\n",
(int)event, hans1);
err_msg("Setting region mask 0x%x\n", region.rg_flags);
}
if (dm_set_region(sid, hanp, hlen, DM_NO_TOKEN, nelem, &region,
&exactflag)) {
errno_msg("Can't set region event");
return(1);
}
return(0);
}
/*
* Respond to any events which haven't been handled yet.
* dm_getall_tokens provides a list of tokens for the outstanding events.