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windows-volume-vlgetaddrs-deadlock-20080718

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LICENSE MIT

If during volume location updating, the VL_GetAddrsU call fails for any
of the identified servers, return an error but do so without leaking
memory or deadlocking other threads that might be waiting.
This commit is contained in:
Jeffrey Altman 2008-07-19 06:58:02 +00:00
parent d3900e4f35
commit c797e08443
1 changed files with 15 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
src/WINNT/afsd/cm_volume.c
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@ -338,7 +338,7 @@ long cm_UpdateVolumeLocation(struct cm_cell *cellp, cm_user_t *userp, cm_req_t *
rwID = uvldbEntry.volumeId[0];
roID = uvldbEntry.volumeId[1];
bkID = uvldbEntry.volumeId[2];
for ( i=0, j=0; i<nServers && j<NMAXNSERVERS; i++ ) {
for ( i=0, j=0; code == 0 && i<nServers && j<NMAXNSERVERS; i++ ) {
if ( !(uvldbEntry.serverFlags[i] & VLSERVER_FLAG_UUID) ) {
serverFlags[j] = uvldbEntry.serverFlags[i];
serverNumber[j] = uvldbEntry.serverNumber[i].time_low;
@ -361,13 +361,15 @@ long cm_UpdateVolumeLocation(struct cm_cell *cellp, cm_user_t *userp, cm_req_t *
continue;
code = VL_GetAddrsU(connp->callp, &attrs, &uuid, &unique, &nentries, &addrs);
if (code == 0 && nentries == 0)
code = VL_NOENT;
} while (cm_Analyze(connp, userp, reqp, NULL, NULL, cellp->vlServersp, NULL, code));
if ( code ) {
code = cm_MapVLRPCError(code, reqp);
if (code)
return code;
osi_Log2(afsd_logp, "CALL VL_GetAddrsU serverNumber %u FAILURE, code 0x%x",
i, code);
continue;
}
osi_Log1(afsd_logp, "CALL VL_GetAddrsU serverNumber %u SUCCESS", i);
addrp = addrs.bulkaddrs_val;
for (k = 0; k < nentries && j < NMAXNSERVERS; j++, k++) {
@ -376,6 +378,9 @@ long cm_UpdateVolumeLocation(struct cm_cell *cellp, cm_user_t *userp, cm_req_t *
}
free(addrs.bulkaddrs_val); /* This is wrong */
if (nentries == 0)
code = CM_ERROR_INVAL;
}
}
nServers = j; /* update the server count */
@ -567,6 +572,9 @@ long cm_UpdateVolumeLocation(struct cm_cell *cellp, cm_user_t *userp, cm_req_t *
volp->vol[BACKVOL].state = bkNewstate;
}
if (code == 0)
volp->flags &= ~CM_VOLUMEFLAG_RESET;
volp->flags &= ~CM_VOLUMEFLAG_UPDATING_VL;
osi_Wakeup((LONG_PTR) &volp->flags);
@ -682,8 +690,6 @@ long cm_FindVolumeByID(cm_cell_t *cellp, afs_uint32 volumeID, cm_user_t *userp,
code = 0;
if ((volp->flags & CM_VOLUMEFLAG_RESET) && !(flags & CM_GETVOL_FLAG_NO_RESET)) {
code = cm_UpdateVolumeLocation(cellp, userp, reqp, volp);
if (code == 0)
volp->flags &= ~CM_VOLUMEFLAG_RESET;
}
lock_ReleaseWrite(&volp->rw);
if (code == 0) {
@ -844,8 +850,6 @@ long cm_FindVolumeByName(struct cm_cell *cellp, char *volumeNamep,
/* if we get here we are holding the mutex */
if ((volp->flags & CM_VOLUMEFLAG_RESET) && !(flags & CM_GETVOL_FLAG_NO_RESET)) {
code = cm_UpdateVolumeLocation(cellp, userp, reqp, volp);
if (code == 0)
volp->flags &= ~CM_VOLUMEFLAG_RESET;
}
lock_ReleaseWrite(&volp->rw);
@ -947,8 +951,6 @@ void cm_ForceUpdateVolume(cm_fid_t *fidp, cm_user_t *userp, cm_req_t *reqp)
* occur.
*/
code = cm_UpdateVolumeLocation(cellp, userp, reqp, volp);
if (code == 0)
volp->flags &= ~CM_VOLUMEFLAG_RESET;
#endif
lock_ReleaseWrite(&volp->rw);
@ -1079,8 +1081,6 @@ cm_CheckOfflineVolume(cm_volume_t *volp, afs_uint32 volID)
if (volp->flags & CM_VOLUMEFLAG_RESET) {
cm_InitReq(&req);
code = cm_UpdateVolumeLocation(volp->cellp, cm_rootUserp, &req, volp);
if (code == 0)
volp->flags &= ~CM_VOLUMEFLAG_RESET;
}
if (volp->vol[RWVOL].ID != 0 && (!volID || volID == volp->vol[RWVOL].ID) &&