src/viced/host.h

   1 /*
   2  * Copyright 2000, International Business Machines Corporation and others.
   3  * All Rights Reserved.
   4  *
   5  * This software has been released under the terms of the IBM Public
   6  * License.  For details, see the LICENSE file in the top-level source
   7  * directory or online at http://www.openafs.org/dl/license10.html
   8  *
   9  * Portions Copyright (c) 2006 Sine Nomine Associates
  10  */
  11
  12 #ifndef _AFS_VICED_HOST_H
  13 #define _AFS_VICED_HOST_H
  14
  15 #include "fs_stats.h"           /*File Server stats package */
  16
  17 /*
  18  * There are three locks in the host package.
  19  * the global hash lock protects hash chains.
  20  * the global list lock protects the list of hosts.
  21  * a mutex in each host structure protects the structure.
  22  * precedence is host_listlock_mutex, host->mutex, host_glock_mutex.
  23  */
  24 #include <rx/rx_globals.h>
  25 #include <pthread.h>
  26 extern pthread_mutex_t host_glock_mutex;
  27 #define H_LOCK opr_mutex_enter(&host_glock_mutex)
  28 #define H_UNLOCK opr_mutex_exit(&host_glock_mutex)
  29 extern pthread_key_t viced_uclient_key;
  30
  31 #define h_MAXHOSTTABLEENTRIES 1000
  32 #define h_HASHENTRIES 256       /* Power of 2 */
  33 #define h_MAXHOSTTABLES 200
  34 #define h_HTSPERBLOCK 512       /* Power of 2 */
  35 #define h_HTSHIFT 9             /* log base 2 of HTSPERBLOCK */
  36
  37 struct Identity {
  38     char valid;                 /* zero if UUID is unknown */
  39     afsUUID uuid;
  40 };
  41
  42 struct AddrPort  {
  43     afs_uint32 addr;            /* in network byte order */
  44     afs_uint16 port;            /* in network byte order */
  45     afs_int16  valid;
  46 };
  47
  48 struct Interface {
  49     afsUUID uuid;
  50     int numberOfInterfaces;
  51     struct AddrPort interface[1];/* there are actually more than one here */
  52     /* in network byte order */
  53 };
  54
  55 struct host_to_zero {
  56     struct host *next, *prev;   /* linked list of all hosts */
  57     struct rx_connection *callback_rxcon;       /* rx callback connection */
  58     afs_uint32 refCount;        /* reference count */
  59     afs_uint32 host;            /* IP address of host interface that is
  60                                  * currently being used, in network
  61                                  * byte order */
  62     afs_uint16 port;            /* port address of host */
  63     char Console;               /* XXXX This host is a console */
  64     unsigned short hostFlags;   /*  bit map */
  65     char InSameNetwork;         /* Is host's addr in the same network as
  66                                  * the File Server's? */
  67     char hcpsfailed;            /* Retry the cps call next time */
  68     prlist hcps;                /* cps for hostip acls */
  69     afs_uint32 LastCall;        /* time of last call from host */
  70     afs_uint32 ActiveCall;      /* time of any call but gettime,
  71                                  * getstats and getcaps */
  72     struct client *FirstClient; /* first connection from host */
  73     afs_uint32 cpsCall;         /* time of last cps call from this host */
  74     struct Interface *interface;/* all alternate addr for client */
  75     afs_uint32 cblist;          /* index of a cb in the per-host circular CB
  76                                  * list */
  77
  78     unsigned int n_tmays;       /* how many successful TellMeAboutYourself
  79                                  * calls have we made against this host? */
  80
  81     /* cache of the result of the last successful TMAY call to this host */
  82     struct interfaceAddr tmay_interf;
  83     Capabilities tmay_caps;
  84 };
  85
  86 struct host {
  87     struct host_to_zero z;
  88
  89     afs_uint32 index;           /* Host table index, for vicecb.c */
  90     struct Lock lock;           /* Write lock for synchronization of
  91                                  * VenusDown flag */
  92     pthread_cond_t cond;        /* used to wait on hcpsValid */
  93 };
  94
  95 struct h_AddrHashChain {
  96     struct host *hostPtr;
  97     struct h_AddrHashChain *next;
  98     afs_uint32 addr;
  99     afs_uint16 port;
 100 };
 101
 102 struct h_UuidHashChain {
 103     struct host *hostPtr;
 104     struct h_UuidHashChain *next;
 105 };
 106
 107 struct client_to_zero {
 108     struct client *next;        /* next client entry for host */
 109     struct host *host;          /* ptr to parent host entry */
 110     afs_int32 sid;              /* Connection number from this host */
 111     prlist CPS;                 /* cps for authentication */
 112     int ViceId;                 /* Vice ID of user */
 113     afs_int32 expTime;          /* RX-only: expiration time */
 114     afs_uint32 LastCall;        /* time of last call */
 115     afs_uint32 VenusEpoch;      /* Venus start time--used to identify
 116                                  * venus.  Actually, now an extension of the
 117                                  * sid, which is why it moved.
 118                                  */
 119     afs_int32 refCount;         /* reference count */
 120     char deleted;               /* True if this client should be deleted
 121                                  * when there are no more users of the
 122                                  * structure */
 123     char authClass;             /* auth type, RX-only */
 124     char prfail;                /* True if prserver couldn't be contacted */
 125     char InSameNetwork;         /* Is client's IP address in the same
 126                                  * network as ours? */
 127 };
 128
 129 struct client {
 130     struct client_to_zero z;
 131     struct Lock lock;           /* lock to ensure CPS valid if entry
 132                                  * on host's clients list. */
 133 };
 134
 135
 136 /*
 137  * key for the client structure stored in connection specific data
 138  */
 139 extern int rxcon_client_key;
 140
 141 /* Some additional functions to get at client information.  Client must have
 142    an active connection for this to work.  If a lwp is working on a request
 143    for the client, then the client must have a connection */
 144 /* N.B. h_UserName returns pointer to static data; also relatively expensive */
 145 extern char *h_UserName(struct client *client);
 146 #define h_Lock(host)    ObtainWriteLock(&(host)->lock)
 147 extern int h_Lock_r(struct host *host);
 148 #define h_Unlock(host)  ReleaseWriteLock(&(host)->lock)
 149 #define h_Unlock_r(host)  ReleaseWriteLock(&(host)->lock)
 150
 151 #define AddCallBack(host, fid)  AddCallBack1((host), (fid), (afs_uint32 *)0, 1/*CB_NORMAL*/, 0)
 152 #define AddVolCallBack(host, fid) AddCallBack1((host), (fid), (afs_uint32 *)0, 3/*CB_VOLUME*/, 0)
 153 #define AddBulkCallBack(host, fid) AddCallBack1((host), (fid), (afs_uint32 *)0, 4/*CB_BULK*/, 0)
 154
 155 /* A simple refCount replaces per-thread hold mechanism.  The former
 156  * hold semantics are not different from refcounting, except with respect
 157  * to cross-thread assertions.  In this change, refcount is protected by
 158  * H_LOCK, just like former hold bitmap.  A future change will replace locks
 159  * th lock-free operations.  */
 160
 161 #define h_Hold_r(x) \
 162 do { \
 163         ++((x)->z.refCount); \
 164 } while(0)
 165
 166 #define h_Decrement_r(x) \
 167 do { \
 168         --((x)->z.refCount); \
 169 } while (0)
 170
 171 #define h_Release_r(x) \
 172 do { \
 173         h_Decrement_r(x); \
 174         if (((x)->z.refCount < 1) && \
 175                 (((x)->z.hostFlags & HOSTDELETED) || \
 176                  ((x)->z.hostFlags & CLIENTDELETED))) h_TossStuff_r((x));        \
 177 } while(0)
 178
 179 /* operations on the global linked list of hosts */
 180 #define h_InsertList_r(h)       (h)->z.next =  hostList;                        \
 181                                 (h)->z.prev = 0;                                \
 182                                 hostList ? (hostList->z.prev = (h)):0;  \
 183                                 hostList = (h);                         \
 184                                 hostCount++;
 185 #define h_DeleteList_r(h)       opr_Assert(hostCount>0);                    \
 186                                 hostCount--;                                \
 187                                 (h)->z.next ? ((h)->z.next->z.prev = (h)->z.prev):0;\
 188                                 (h)->z.prev ? ((h)->z.prev->z.next = (h)->z.next):0;\
 189                                 ( h == hostList )? (hostList = h->z.next):0;
 190
 191 extern int DeleteAllCallBacks_r(struct host *host, int deletefe);
 192 extern int DeleteCallBack(struct host *host, AFSFid * fid);
 193 extern int MultiProbeAlternateAddress_r(struct host *host);
 194 extern int BreakDelayedCallBacks_r(struct host *host);
 195 extern int AddCallBack1(struct host *host, AFSFid * fid, afs_uint32 * thead, int type,
 196              int locked);
 197 extern int BreakCallBack(struct host *xhost, AFSFid * fid, int flag);
 198 extern int DeleteFileCallBacks(AFSFid * fid);
 199 extern int CleanupTimedOutCallBacks(void);
 200 extern int CleanupTimedOutCallBacks_r(void);
 201 extern int MultiBreakCallBackAlternateAddress(struct host *host, struct AFSCBFids *afidp);
 202 extern int MultiBreakCallBackAlternateAddress_r(struct host *host,
 203                                      struct AFSCBFids *afidp);
 204 extern int DumpCallBackState(void);
 205 extern int PrintCallBackStats(void);
 206 extern void ShutDownAndCore(int dopanic);
 207
 208 extern int h_Lookup_r(afs_uint32 hostaddr, afs_uint16 hport,
 209                       struct host **hostp);
 210 extern struct host *h_LookupUuid_r(afsUUID * uuidp);
 211 extern void h_Enumerate(int (*proc) (struct host *, void *), void *param);
 212 extern void h_Enumerate_r(int (*proc) (struct host *, void *), struct host *enumstart, void *param);
 213 extern struct host *h_GetHost_r(struct rx_connection *tcon);
 214 extern struct client *h_FindClient_r(struct rx_connection *tcon, afs_int32 *viceid);
 215 extern int h_ReleaseClient_r(struct client *client);
 216 extern void h_TossStuff_r(struct host *host);
 217 extern void h_EnumerateClients(VolumeId vid,
 218                                int (*proc)(struct client *client, void *rock),
 219                                void *arock);
 220 extern int GetClient(struct rx_connection *tcon, struct client **cp);
 221 extern int PutClient(struct client **cp);
 222 extern void h_PrintStats(void);
 223 extern void h_PrintClients(void);
 224 extern void h_GetWorkStats(int *, int *, int *, afs_int32);
 225 extern void h_GetWorkStats64(afs_uint64 *, afs_uint64 *, afs_uint64 *, afs_int32);
 226 extern void h_flushhostcps(afs_uint32 hostaddr,
 227                            afs_uint16 hport);
 228 extern void h_GetHostNetStats(afs_int32 * a_numHostsP, afs_int32 * a_sameNetOrSubnetP,
 229                   afs_int32 * a_diffSubnetP, afs_int32 * a_diffNetworkP);
 230 extern int h_NBLock_r(struct host *host);
 231 extern void h_DumpHosts(void);
 232 extern void h_InitHostPackage(int hquota);
 233 extern void h_CheckHosts(void );
 234 extern void h_AddHostToAddrHashTable_r(afs_uint32 addr, afs_uint16 port, struct host * host);
 235 extern void h_AddHostToUuidHashTable_r(afsUUID * uuid, struct host * host);
 236 extern int h_DeleteHostFromAddrHashTable_r(afs_uint32 addr, afs_uint16 port, struct host *host);
 237 extern int h_DeleteHostFromUuidHashTable_r(struct host *host);
 238 extern int addInterfaceAddr_r(struct host *host, afs_uint32 addr, afs_uint16 port);
 239 extern int removeInterfaceAddr_r(struct host *host, afs_uint32 addr, afs_uint16 port);
 240 extern afs_int32 hpr_Initialize(struct ubik_client **);
 241 extern int hpr_End(struct ubik_client *);
 242 extern int hpr_IdToName(idlist *ids, namelist *names);
 243 extern int hpr_NameToId(namelist *names, idlist *ids);
 244
 245 #ifdef AFS_DEMAND_ATTACH_FS
 246 /*
 247  * demand attach fs
 248  * state serialization
 249  */
 250 extern int h_SaveState(void);
 251 extern int h_RestoreState(void);
 252 #endif
 253
 254 #define H_ENUMERATE_BAIL(flags)        ((flags)|0x80000000)
 255 #define H_ENUMERATE_ISSET_BAIL(flags)  ((flags)&0x80000000)
 256
 257 struct host *(hosttableptrs[h_MAXHOSTTABLES]);  /* Used by h_itoh */
 258 #define h_htoi(host) ((host)->index)    /* index isn't zeroed, no need to lock */
 259 #define h_itoh(hostindex) (hosttableptrs[(hostindex)>>h_HTSHIFT]+((hostindex)&(h_HTSPERBLOCK-1)))
 260
 261 #define rxr_GetEpoch(aconn) (((struct rx_connection *)(aconn))->epoch)
 262
 263 #define rxr_CidOf(aconn) (((struct rx_connection *)(aconn))->cid)
 264
 265 #define rxr_PortOf(aconn) \
 266     rx_PortOf(rx_PeerOf(((struct rx_connection *)(aconn))))
 267
 268 #define rxr_HostOf(aconn) \
 269     rx_HostOf(rx_PeerOf((struct rx_connection *)(aconn)))
 270
 271 #define HCPS_INPROGRESS                 0x01    /*set when CPS is being updated */
 272 #define HCPS_WAITING                    0x02    /*waiting for CPS to get updated */
 273 #define ALTADDR                         0x04    /*InitCallBack is being done */
 274 #define VENUSDOWN                       0x08    /* venus CallBack failed */
 275 #define HOSTDELETED                     0x10    /* host delated */
 276 #define CLIENTDELETED                   0x20    /* client deleted */
 277 #define RESETDONE                       0x40    /* callback reset done */
 278 #define HFE_LATER                       0x80    /* host has FE_LATER callbacks */
 279 #define HERRORTRANS                    0x100    /* do error translation */
 280 #define HWHO_INPROGRESS                0x200    /* set when WhoAreYou running */
 281 #define HCBREAK                        0x400    /* flag for a multi CB break */
 282 #endif /* _AFS_VICED_HOST_H */