#include <afsconfig.h>
#include "afs/param.h"
-RCSID
- ("$Header$");
+#include <linux/module.h> /* early to avoid printf->printk mapping */
#include "afs/sysincludes.h"
#include "afsincludes.h"
-#include "h/unistd.h" /* For syscall numbers. */
-#include "h/mm.h"
+#include <linux/unistd.h> /* For syscall numbers. */
+#include <linux/mm.h>
#ifdef AFS_AMD64_LINUX20_ENV
-#include "../asm/ia32_unistd.h"
+#include <asm/ia32_unistd.h>
#endif
-#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/slab.h>
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
#include <linux/init.h>
#include <linux/sched.h>
-#endif
-#if !defined(EXPORTED_SYS_CALL_TABLE) && defined(HAVE_KERNEL_LINUX_SYSCALL_H)
-#include <linux/syscall.h>
-#endif
-
-#ifdef AFS_SPARC64_LINUX24_ENV
-#define __NR_setgroups32 82 /* This number is not exported for some bizarre reason. */
-#endif
-
-#if !defined(AFS_LINUX24_ENV)
-asmlinkage int (*sys_settimeofdayp) (struct timeval * tv,
- struct timezone * tz);
-#endif
-asmlinkage long (*sys_setgroupsp) (int gidsetsize, gid_t * grouplist);
-#ifdef EXPORTED_SYS_CALL_TABLE
-#if defined(AFS_SPARC64_LINUX20_ENV) || defined(AFS_S390X_LINUX24_ENV)
-extern unsigned int sys_call_table[]; /* changed to uint because SPARC64 and S390X have syscalltable of 32bit items */
-#else
-extern void *sys_call_table[]; /* safer for other linuces */
-#endif
-#else /* EXPORTED_SYS_CALL_TABLE */
-#if defined(AFS_SPARC64_LINUX20_ENV) || defined(AFS_S390X_LINUX24_ENV)
-static unsigned int *sys_call_table; /* changed to uint because SPARC64 and S390X have syscalltable of 32bit items */
-#else
-static void **sys_call_table; /* safer for other linuces */
-#endif
-#endif
+#include <linux/kernel.h>
-#if defined(AFS_S390X_LINUX24_ENV)
-#define _S(x) ((x)<<1)
-#else
-#define _S(x) x
-#endif
+#include "osi_pagecopy.h"
extern struct file_system_type afs_fs_type;
-static long get_page_offset(void);
-
-#if defined(AFS_LINUX24_ENV)
-DECLARE_MUTEX(afs_global_lock);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
+DEFINE_MUTEX(afs_global_lock);
#else
-struct semaphore afs_global_lock = MUTEX;
+DECLARE_MUTEX(afs_global_lock);
#endif
int afs_global_owner = 0;
-#if !defined(AFS_LINUX24_ENV)
-unsigned long afs_linux_page_offset = 0; /* contains the PAGE_OFFSET value */
-#endif
-
-/* Since sys_ni_syscall is not exported, I need to cache it in order to restore
- * it.
- */
-#if defined(AFS_SPARC64_LINUX20_ENV) || defined(AFS_S390X_LINUX24_ENV)
-static unsigned int afs_ni_syscall = 0;
-#else
-static void *afs_ni_syscall = 0;
-#endif
-
-#ifdef AFS_AMD64_LINUX20_ENV
-#ifdef EXPORTED_IA32_SYS_CALL_TABLE
-extern void *ia32_sys_call_table[];
-#else
-static void **ia32_sys_call_table;
-#endif
-
-static void *ia32_ni_syscall = 0;
-asmlinkage long (*sys32_setgroupsp) (int gidsetsize, u16 * grouplist);
-#if defined(__NR_ia32_setgroups32)
-asmlinkage long (*sys32_setgroups32p) (int gidsetsize, gid_t * grouplist);
-#endif /* __NR_ia32_setgroups32 */
-#endif /* AFS_AMD64_LINUX20_ENV */
-
-#ifdef AFS_PPC64_LINUX20_ENV
-asmlinkage long (*sys32_setgroupsp)(int gidsetsize, gid_t *grouplist);
-#endif /* AFS_AMD64_LINUX20_ENV */
-
-#ifdef AFS_SPARC64_LINUX20_ENV
-static unsigned int afs_ni_syscall32 = 0;
-asmlinkage int (*sys32_setgroupsp) (int gidsetsize,
- __kernel_gid_t32 * grouplist);
-#if defined(__NR_setgroups32)
-asmlinkage int (*sys32_setgroups32p) (int gidsetsize,
- __kernel_gid_t32 * grouplist);
-#endif /* __NR_setgroups32 */
-#ifdef EXPORTED_SYS_CALL_TABLE
-extern unsigned int sys_call_table32[];
-#else /* EXPORTED_SYS_CALL_TABLE */
-static unsigned int *sys_call_table32;
-#endif /* EXPORTED_SYS_CALL_TABLE */
-
-asmlinkage int
-afs_syscall32(long syscall, long parm1, long parm2, long parm3, long parm4,
- long parm5)
-{
- __asm__ __volatile__("srl %o4, 0, %o4\n\t" "mov %o7, %i7\n\t"
- "call afs_syscall\n\t" "srl %o5, 0, %o5\n\t"
- "ret\n\t" "nop");
-}
-#endif /* AFS_SPARC64_LINUX20_ENV */
-
-static int afs_ioctl(struct inode *, struct file *, unsigned int,
- unsigned long);
-
-static struct file_operations afs_syscall_fops = {
- .ioctl = afs_ioctl,
-};
-
-int
-csdbproc_read(char *buffer, char **start, off_t offset, int count,
- int *eof, void *data)
-{
- int len, i, j;
- struct afs_q *cq, *tq;
- struct cell *tc;
- void *ret = NULL;
- char tbuffer[16];
- afs_uint32 addr;
-
- len = 0;
- ObtainReadLock(&afs_xcell);
- for (cq = CellLRU.next; cq != &CellLRU; cq = tq) {
- tc = QTOC(cq); tq = QNext(cq);
- len += sprintf(buffer + len, ">%s #(%d/%d)\n", tc->cellName,
- tc->cellNum, tc->cellIndex);
- for (j = 0; j < MAXCELLHOSTS; j++) {
- if (!tc->cellHosts[j]) break;
- addr = ntohl(tc->cellHosts[j]->addr->sa_ip);
- sprintf(tbuffer, "%d.%d.%d.%d",
- (int)((addr>>24) & 0xff), (int)((addr>>16) & 0xff),
- (int)((addr>>8) & 0xff), (int)( addr & 0xff));
- len += sprintf(buffer + len, "%s #%s\n", tbuffer, tbuffer);
- }
- }
- ReleaseReadLock(&afs_xcell);
-
- if (offset >= len) {
- *start = buffer;
- *eof = 1;
- return 0;
- }
- *start = buffer + offset;
- if ((len -= offset) > count)
- return count;
- *eof = 1;
- return len;
-}
-
-int
-peerproc_read(char *buffer, char **start, off_t offset, int count,
- int *eof, void *data)
-{
- int len, i, j;
- struct rx_peer *sep;
- void *ret = NULL;
- char tbuffer[16];
- afs_uint32 addr;
-
- len = 0;
- for (i = 0, j = 0; i < 256; i++) {
- for (sep = rx_peerHashTable[i]; sep; sep = sep->next, j++) {
- len += sprintf(buffer + len, "%lx: next=0x%lx, host=0x%x, ", sep, sep->next,
- sep->host);
- len += sprintf(buffer + len, "ifMTU=%d, natMTU=%d, maxMTU=%d\n", sep->ifMTU,
- sep->natMTU, sep->maxMTU);
- len += sprintf(buffer + len, "\trtt=%d:%d, timeout(%d:%d), nSent=%d, reSends=%d\n",
- sep->rtt, sep->rtt_dev, sep->timeout.sec,
- sep->timeout.usec, sep->nSent, sep->reSends);
- len += sprintf(buffer + len, "\trefCount=%d, port=%d, idleWhen=0x%x\n",
- sep->refCount, sep->port, sep->idleWhen);
- len += sprintf(buffer + len, "\tCongestionQueue (0x%x:0x%x), inPacketSkew=0x%x, outPacketSkew=0x%x\n",
- sep->congestionQueue.prev, sep->congestionQueue.next,
- sep->inPacketSkew, sep->outPacketSkew);
-#ifdef RX_ENABLE_LOCKS
- len += sprintf(buffer + len, "\tpeer_lock=%d\n", sep->peer_lock);
-#endif /* RX_ENABLE_LOCKS */
- }
- }
-
- if (offset >= len) {
- *start = buffer;
- *eof = 1;
- return 0;
- }
- *start = buffer + offset;
- if ((len -= offset) > count)
- return count;
- *eof = 1;
- return len;
-}
-
-int
-rxstatsproc_read(char *buffer, char **start, off_t offset, int count,
- int *eof, void *data)
-{
- int len, i, j;
- void *ret = NULL;
- char tbuffer[16];
- afs_uint32 addr;
-
- len = 0;
- len += sprintf(buffer + len, "packetRequests = %d\n", rx_stats.packetRequests);
- len += sprintf(buffer + len, "noPackets[%d] = %d\n", RX_PACKET_CLASS_RECEIVE,
- rx_stats.receivePktAllocFailures);
- len += sprintf(buffer + len, "noPackets[%d] = %d\n", RX_PACKET_CLASS_SEND,
- rx_stats.sendPktAllocFailures);
- len += sprintf(buffer + len, "noPackets[%d] = %d\n", RX_PACKET_CLASS_SPECIAL,
- rx_stats.specialPktAllocFailures);
- len += sprintf(buffer + len, "noPackets[%d] = %d\n", RX_PACKET_CLASS_RECV_CBUF,
- rx_stats.receiveCbufPktAllocFailures);
- len += sprintf(buffer + len, "noPackets[%d] = %d\n", RX_PACKET_CLASS_SEND_CBUF,
- rx_stats.sendCbufPktAllocFailures);
- len += sprintf(buffer + len, "socketGreedy = %d\n", rx_stats.socketGreedy);
- len += sprintf(buffer + len, "bogusPacketOnRead = %d\n", rx_stats.bogusPacketOnRead);
- len += sprintf(buffer + len, "bogusHost = %d\n", rx_stats.bogusHost);
- len += sprintf(buffer + len, "noPacketOnRead = %d\n", rx_stats.noPacketOnRead);
- len += sprintf(buffer + len, "noPacketBuffersOnRead = %d\n",
- rx_stats.noPacketBuffersOnRead);
- len += sprintf(buffer + len, "selects = %d\n", rx_stats.selects);
- len += sprintf(buffer + len, "sendSelects = %d\n", rx_stats.sendSelects);
- for (i = 0; i < RX_N_PACKET_TYPES; i++)
- len += sprintf(buffer + len, "packetsRead[%d] = %d\n", i, rx_stats.packetsRead[i]);
- len += sprintf(buffer + len, "dataPacketsRead = %d\n", rx_stats.dataPacketsRead);
- len += sprintf(buffer + len, "ackPacketsRead = %d\n", rx_stats.ackPacketsRead);
- len += sprintf(buffer + len, "dupPacketsRead = %d\n", rx_stats.dupPacketsRead);
- len += sprintf(buffer + len, "spuriousPacketsRead = %d\n", rx_stats.spuriousPacketsRead);
- for (i = 0; i < RX_N_PACKET_TYPES; i++)
- len += sprintf(buffer + len, "packetsSent[%d] = %d\n", i, rx_stats.packetsSent[i]);
- len += sprintf(buffer + len, "ackPacketsSent = %d\n", rx_stats.ackPacketsSent);
- len += sprintf(buffer + len, "pingPacketsSent = %d\n", rx_stats.pingPacketsSent);
- len += sprintf(buffer + len, "abortPacketsSent = %d\n", rx_stats.abortPacketsSent);
- len += sprintf(buffer + len, "busyPacketsSent = %d\n", rx_stats.busyPacketsSent);
- len += sprintf(buffer + len, "dataPacketsSent = %d\n", rx_stats.dataPacketsSent);
- len += sprintf(buffer + len, "dataPacketsReSent = %d\n", rx_stats.dataPacketsReSent);
- len += sprintf(buffer + len, "dataPacketsPushed = %d\n", rx_stats.dataPacketsPushed);
- len += sprintf(buffer + len, "ignoreAckedPacket = %d\n", rx_stats.ignoreAckedPacket);
- len += sprintf(buffer + len, "totalRtt = %d sec, %d usec\n", rx_stats.totalRtt.sec,
- rx_stats.totalRtt.usec);
- len += sprintf(buffer + len, "minRtt = %d sec, %d usec\n", rx_stats.minRtt.sec,
- rx_stats.minRtt.usec);
- len += sprintf(buffer + len, "maxRtt = %d sec, %d usec\n", rx_stats.maxRtt.sec,
- rx_stats.maxRtt.usec);
- len += sprintf(buffer + len, "nRttSamples = %d\n", rx_stats.nRttSamples);
- len += sprintf(buffer + len, "nServerConns = %d\n", rx_stats.nServerConns);
- len += sprintf(buffer + len, "nClientConns = %d\n", rx_stats.nClientConns);
- len += sprintf(buffer + len, "nPeerStructs = %d\n", rx_stats.nPeerStructs);
- len += sprintf(buffer + len, "nCallStructs = %d\n", rx_stats.nCallStructs);
- len += sprintf(buffer + len, "nFreeCallStructs = %d\n", rx_stats.nFreeCallStructs);
- len += sprintf(buffer + len, "netSendFailures = %d\n", rx_stats.netSendFailures);
- len += sprintf(buffer + len, "fatalErrors = %d\n", rx_stats.fatalErrors);
-
- if (offset >= len) {
- *start = buffer;
- *eof = 1;
- return 0;
- }
- *start = buffer + offset;
- if ((len -= offset) > count)
- return count;
- *eof = 1;
- return len;
-}
-
-int
-rxproc_read(char *buffer, char **start, off_t offset, int count,
- int *eof, void *data)
-{
- int len, i, j;
- struct rx_peer *sep;
- void *ret = NULL;
- char tbuffer[16];
- afs_uint32 addr;
-
- len = 0;
- len += sprintf(buffer + len, "rx_extraQuota = %d\n", rx_extraQuota);
- len += sprintf(buffer + len, "rx_extraPackets = %d\n", rx_extraPackets);
- len += sprintf(buffer + len, "rx_stackSize = %d\n", rx_stackSize);
- len += sprintf(buffer + len, "rx_connDeadTime = %d\n", rx_connDeadTime);
- len += sprintf(buffer + len, "rx_idleConnectionTime = %d\n", rx_idleConnectionTime);
- len += sprintf(buffer + len, "rx_idlePeerTime = %d\n", rx_idlePeerTime);
- len += sprintf(buffer + len, "rx_initSendWindow = %d\n", rx_initSendWindow);
- len += sprintf(buffer + len, "rxi_nSendFrags = %d\n", rxi_nSendFrags);
- len += sprintf(buffer + len, "rx_nPackets = %d\n", rx_nPackets);
- len += sprintf(buffer + len, "rx_nFreePackets = %d\n", rx_nFreePackets);
- len += sprintf(buffer + len, "rx_socket = 0x%x\n", rx_socket);
- len += sprintf(buffer + len, "rx_Port = %d\n", rx_port);
- for (i = 0; i < RX_N_PACKET_CLASSES; i++)
- len += sprintf(buffer + len, "\trx_packetQuota[%d] = %d\n", i, rx_packetQuota[i]);
-
- len += sprintf(buffer + len, "rx_nextCid = 0x%x\n", rx_nextCid);
- len += sprintf(buffer + len, "rx_epoch = 0u%u\n", rx_epoch);
- len += sprintf(buffer + len, "rx_waitingForPackets = %x\n", rx_waitingForPackets);
- len += sprintf(buffer + len, "rxi_nCalls = %d\n", rxi_nCalls);
- len += sprintf(buffer + len, "rxi_dataQuota = %d\n", rxi_dataQuota);
- len += sprintf(buffer + len, "rxi_availProcs = %d\n", rxi_availProcs);
- len += sprintf(buffer + len, "rxi_totalMin = %d\n", rxi_totalMin);
- len += sprintf(buffer + len, "rxi_minDeficit = %d\n", rxi_minDeficit);
-
- len += sprintf(buffer + len, "rxevent_nFree = %d\nrxevent_nPosted = %d\n", rxevent_nFree, rxevent_nPosted);
-
- if (offset >= len) {
- *start = buffer;
- *eof = 1;
- return 0;
- }
- *start = buffer + offset;
- if ((len -= offset) > count)
- return count;
- *eof = 1;
- return len;
-}
-
-int
-connproc_read(char *buffer, char **start, off_t offset, int count,
- int *eof, void *data)
-{
- int len, i, j;
- struct rx_connection *sep;
- void *ret = NULL;
- char tbuffer[16];
- afs_uint32 addr;
-
- len = 0;
- for (i = 0, j = 0; i < 256; i++) {
- for (sep = rx_connHashTable[i]; sep; sep = sep->next, j++) {
- len += sprintf(buffer + len, "%lx: next=0x%lx, peer=0x%lx, epoch=0x%x, cid=0x%x, ackRate=%d\n",
- sep, sep->next, sep->peer, sep->epoch, sep->cid,
- sep->ackRate);
- len += sprintf(buffer + len, "\tcall[%x=%d, %x=%d, %x=%d, %x=%d]\n",
- sep->call[0], sep->callNumber[0], sep->call[1],
- sep->callNumber[1], sep->call[2],
- sep->callNumber[2], sep->call[3],
- sep->callNumber[3]);
- len += sprintf(buffer + len, "\ttimeout=%d, flags=0x%x, type=0x%x, serviceId=%d, service=0x%lx, refCount=%d\n",
- sep->timeout, sep->flags, sep->type,
- sep->serviceId, sep->service, sep->refCount);
- len += sprintf(buffer + len, "\tserial=%d, lastSerial=%d, secsUntilDead=%d, secsUntilPing=%d, secIndex=%d\n",
- sep->serial, sep->lastSerial, sep->secondsUntilDead,
- sep->secondsUntilPing, sep->securityIndex);
- len += sprintf(buffer + len, "\terror=%d, secObject=0x%lx, secData=0x%lx, secHeaderSize=%d, secmaxTrailerSize=%d\n",
- sep->error, sep->securityObject, sep->securityData,
- sep->securityHeaderSize,
- sep->securityMaxTrailerSize);
- len += sprintf(buffer + len, "\tchallEvent=0x%lx, lastSendTime=0x%x, maxSerial=%d, hardDeadTime=%d\n",
- sep->challengeEvent, sep->lastSendTime,
- sep->maxSerial, sep->hardDeadTime);
- if (sep->flags & RX_CONN_MAKECALL_WAITING)
- len += sprintf(buffer + len, "\t***** Conn in RX_CONN_MAKECALL_WAITING state *****\n");
-#ifdef RX_ENABLE_LOCKS
- len += sprintf(buffer + len, "\tcall_lock=%d, call_cv=%d, data_lock=%d, refCount=%d\n",
- sep->conn_call_lock, sep->conn_call_cv,
- sep->conn_data_lock, sep->refCount);
-#endif /* RX_ENABLE_LOCKS */
- }
- }
-
- if (offset >= len) {
- *start = buffer;
- *eof = 1;
- return 0;
- }
- *start = buffer + offset;
- if ((len -= offset) > count)
- return count;
- *eof = 1;
- return len;
-}
-
-int
-servicesproc_read(char *buffer, char **start, off_t offset, int count,
- int *eof, void *data)
-{
- int len, i, j;
- struct rx_service *sentry;
- void *ret = NULL;
- char tbuffer[16];
- afs_uint32 addr;
-
- len = 0;
- for (i = 0, j = 0; i < RX_MAX_SERVICES; i++) {
- if (sentry = rx_services[i]) {
- j++;
- len += sprintf(buffer + len,
- "\t%lx: serviceId=%d, port=%d, serviceName=%s, socket=0x%x\n",
- sentry, sentry->serviceId, sentry->servicePort,
- sentry->serviceName, sentry->socket);
- len += sprintf(buffer + len,
- "\t\tnSecObj=%d, nReqRunning=%d, maxProcs=%d, minProcs=%d, connDeadTime=%d, idleDeadTime=%d\n",
- sentry->nSecurityObjects, sentry->nRequestsRunning,
- sentry->maxProcs, sentry->minProcs,
- sentry->connDeadTime, sentry->idleDeadTime);
- }
- }
-
- if (offset >= len) {
- *start = buffer;
- *eof = 1;
- return 0;
- }
- *start = buffer + offset;
- if ((len -= offset) > count)
- return count;
- *eof = 1;
- return len;
-}
-
-int
-callproc_read(char *buffer, char **start, off_t offset, int count,
- int *eof, void *data)
-{
- int len, i, j, k;
- struct rx_connection *sep;
- void *ret = NULL;
- char tbuffer[16];
- afs_uint32 addr;
-
- len = 0;
- for (i = 0, j = 0; i < 256; i++) {
- for (sep = rx_connHashTable[i]; sep; sep = sep->next) {
- for (k = 0; k < RX_MAXCALLS; k++) {
- struct rx_call *call = sep->call[k];
- if (call) {
- j++;
- len += sprintf(buffer + len,
- "%lx: conn=0x%lx, qiheader(0x%lx:0x%lx), tq(0x%lx:0x%lx), rq(0x%lx:0x%lx)\n",
- call, call->conn, call->queue_item_header.prev,
- call->queue_item_header.next, call->tq.prev,
- call->tq.next, call->rq.prev, call->rq.next);
- len += sprintf(buffer + len,
- "\t: curvec=%d, curpos=%d, nLeft=%d, nFree=%d, currPacket=0x%lx, callNumber=0x%x\n",
- call->curvec, call->curpos, call->nLeft,
- call->nFree, call->currentPacket,
- call->callNumber);
- len += sprintf(buffer + len,
- "\t: channel=%d, state=0x%x, mode=0x%x, flags=0x%x, localStatus=0x%x, remStatus=0x%x\n",
- call->channel, call->state, call->mode,
- call->flags, call->localStatus,
- call->remoteStatus);
- len += sprintf(buffer + len,
- "\t: error=%d, timeout=0x%x, rnext=0x%x, rprev=0x%x, rwind=0x%x, tfirst=0x%x, tnext=0x%x\n",
- call->error, call->timeout, call->rnext,
- call->rprev, call->rwind, call->tfirst,
- call->tnext);
- len += sprintf(buffer + len,
- "\t: twind=%d, resendEvent=0x%lx, timeoutEvent=0x%lx, keepAliveEvent=0x%lx, delayedAckEvent=0x%lx\n",
- call->twind, call->resendEvent,
- call->timeoutEvent, call->keepAliveEvent,
- call->delayedAckEvent);
- len += sprintf(buffer + len,
- "\t: lastSendTime=0x%x, lastReceiveTime=0x%x, lastAcked=0x%x, startTime=0x%x, startWait=0x%x\n",
- call->lastSendTime, call->lastReceiveTime,
- call->lastAcked, call->startTime,
- call->startWait);
- if (call->flags & RX_CALL_WAIT_PROC)
- len += sprintf(buffer + len,
- "\t******** Call in RX_CALL_WAIT_PROC state **********\n");
- if (call->flags & RX_CALL_WAIT_WINDOW_ALLOC)
- len += sprintf(buffer + len,
- "\t******** Call in RX_CALL_WAIT_WINDOW_ALLOC state **********\n");
- if (call->flags & RX_CALL_READER_WAIT)
- len += sprintf(buffer + len,
- "\t******** Conn in RX_CALL_READER_WAIT state **********\n");
- if (call->flags & RX_CALL_WAIT_PACKETS)
- len += sprintf(buffer + len,
- "\t******** Conn in RX_CALL_WAIT_PACKETS state **********\n");
-#ifdef RX_ENABLE_LOCKS
- len += sprintf(buffer + len,
- "\t: lock=0x%x, cv_twind=0x%x, cv_rq=0x%x, refCount= %d\n",
- call->lock, call->cv_twind, call->cv_rq,
- call->refCount);
-#endif /* RX_ENABLE_LOCKS */
- len += sprintf(buffer + len, "\t: MTU=%d\n", call->MTU);
- }
- }
- }
- }
-
- if (offset >= len) {
- *start = buffer;
- *eof = 1;
- return 0;
- }
- *start = buffer + offset;
- if ((len -= offset) > count)
- return count;
- *eof = 1;
- return len;
-}
-
-static struct proc_dir_entry *openafs_procfs;
-
-static int
-afsproc_init()
-{
- struct proc_dir_entry *entry1;
- struct proc_dir_entry *entry;
-
- openafs_procfs = proc_mkdir(PROC_FSDIRNAME, proc_root_fs);
- entry1 = create_proc_entry(PROC_SYSCALL_NAME, 0666, openafs_procfs);
-
- entry1->proc_fops = &afs_syscall_fops;
-
- entry1->owner = THIS_MODULE;
-
- entry = create_proc_read_entry(PROC_CELLSERVDB_NAME, (S_IFREG|S_IRUGO), openafs_procfs, csdbproc_read, NULL);
-
- entry = create_proc_read_entry(PROC_PEER_NAME, (S_IFREG|S_IRUGO), openafs_procfs, peerproc_read, NULL);
-
- entry = create_proc_read_entry(PROC_CONN_NAME, (S_IFREG|S_IRUGO), openafs_procfs, connproc_read, NULL);
-
- entry = create_proc_read_entry(PROC_CALL_NAME, (S_IFREG|S_IRUGO), openafs_procfs, connproc_read, NULL);
-
- entry = create_proc_read_entry(PROC_RX_NAME, (S_IFREG|S_IRUGO), openafs_procfs, rxproc_read, NULL);
-
- entry = create_proc_read_entry(PROC_SERVICES_NAME, (S_IFREG|S_IRUGO), openafs_procfs, servicesproc_read, NULL);
- entry = create_proc_read_entry(PROC_RXSTATS_NAME, (S_IFREG|S_IRUGO), openafs_procfs, rxstatsproc_read, NULL);
-
- return 0;
-}
-
-static void
-afsproc_exit()
-{
- remove_proc_entry(PROC_RXSTATS_NAME, openafs_procfs);
- remove_proc_entry(PROC_SERVICES_NAME, openafs_procfs);
- remove_proc_entry(PROC_RX_NAME, openafs_procfs);
- remove_proc_entry(PROC_CALL_NAME, openafs_procfs);
- remove_proc_entry(PROC_CONN_NAME, openafs_procfs);
- remove_proc_entry(PROC_PEER_NAME, openafs_procfs);
- remove_proc_entry(PROC_CELLSERVDB_NAME, openafs_procfs);
- remove_proc_entry(PROC_SYSCALL_NAME, openafs_procfs);
- remove_proc_entry(PROC_FSDIRNAME, proc_root_fs);
-}
-
-extern asmlinkage long
-afs_syscall(long syscall, long parm1, long parm2, long parm3, long parm4);
-
-static int
-afs_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
-
- struct afsprocdata sysargs;
-
- if (cmd != VIOC_SYSCALL) return -EINVAL;
-
- if (copy_from_user(&sysargs, (void *)arg, sizeof(struct afsprocdata)))
- return -EFAULT;
-
- return afs_syscall(sysargs.syscall, sysargs.param1,
- sysargs.param2, sysargs.param3, sysargs.param4);
-}
-
-#ifdef AFS_IA64_LINUX20_ENV
-
-asmlinkage long
-afs_syscall_stub(int r0, int r1, long r2, long r3, long r4, long gp)
-{
- __asm__ __volatile__("alloc r42 = ar.pfs, 8, 3, 6, 0\n\t" "mov r41 = b0\n\t" /* save rp */
- "mov out0 = in0\n\t" "mov out1 = in1\n\t" "mov out2 = in2\n\t" "mov out3 = in3\n\t" "mov out4 = in4\n\t" "mov out5 = gp\n\t" /* save gp */
- ";;\n" ".L1: mov r3 = ip\n\t" ";;\n\t" "addl r15=.fptr_afs_syscall-.L1,r3\n\t" ";;\n\t" "ld8 r15=[r15]\n\t" ";;\n\t" "ld8 r16=[r15],8\n\t" ";;\n\t" "ld8 gp=[r15]\n\t" "mov b6=r16\n\t" "br.call.sptk.many b0 = b6\n\t" ";;\n\t" "mov ar.pfs = r42\n\t" "mov b0 = r41\n\t" "mov gp = r48\n\t" /* restore gp */
- "br.ret.sptk.many b0\n" ".fptr_afs_syscall:\n\t"
- "data8 @fptr(afs_syscall)");
-}
-
-asmlinkage long
-afs_xsetgroups_stub(int r0, int r1, long r2, long r3, long r4, long gp)
-{
- __asm__ __volatile__("alloc r42 = ar.pfs, 8, 3, 6, 0\n\t" "mov r41 = b0\n\t" /* save rp */
- "mov out0 = in0\n\t" "mov out1 = in1\n\t" "mov out2 = in2\n\t" "mov out3 = in3\n\t" "mov out4 = in4\n\t" "mov out5 = gp\n\t" /* save gp */
- ";;\n" ".L2: mov r3 = ip\n\t" ";;\n\t" "addl r15=.fptr_afs_xsetgroups - .L2,r3\n\t" ";;\n\t" "ld8 r15=[r15]\n\t" ";;\n\t" "ld8 r16=[r15],8\n\t" ";;\n\t" "ld8 gp=[r15]\n\t" "mov b6=r16\n\t" "br.call.sptk.many b0 = b6\n\t" ";;\n\t" "mov ar.pfs = r42\n\t" "mov b0 = r41\n\t" "mov gp = r48\n\t" /* restore gp */
- "br.ret.sptk.many b0\n" ".fptr_afs_xsetgroups:\n\t"
- "data8 @fptr(afs_xsetgroups)");
-}
-
-struct fptr {
- void *ip;
- unsigned long gp;
-};
-
-#endif /* AFS_IA64_LINUX20_ENV */
-
-#ifdef AFS_LINUX24_ENV
-asmlinkage int (*sys_setgroups32p) (int gidsetsize,
- __kernel_gid32_t * grouplist);
-#endif /* AFS_LINUX24_ENV */
-
-#if defined(AFS_SPARC64_LINUX20_ENV) || defined(AFS_S390X_LINUX24_ENV)
-#define POINTER2SYSCALL (unsigned int)(unsigned long)
-#define SYSCALL2POINTER (void *)(long)
-#else
-#define POINTER2SYSCALL (void *)
-#define SYSCALL2POINTER (void *)
+#ifdef HAVE_LINUX_KUID_T
+struct user_namespace *afs_ns;
#endif
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
int __init
afs_init(void)
-#else
-int
-init_module(void)
-#endif
{
-#if defined(AFS_IA64_LINUX20_ENV)
- unsigned long kernel_gp = 0;
- static struct fptr sys_setgroups;
-#endif /* defined(AFS_IA64_LINUX20_ENV) */
- extern long afs_xsetgroups();
-#if defined(__NR_setgroups32)
- extern int afs_xsetgroups32();
-#endif /* __NR_setgroups32 */
-#if defined(AFS_SPARC64_LINUX20_ENV) || defined (AFS_AMD64_LINUX20_ENV) || defined(AFS_PPC64_LINUX20_ENV)
- extern int afs32_xsetgroups();
-#if (defined(__NR_setgroups32) && defined(AFS_SPARC64_LINUX20_ENV))
- extern int afs32_xsetgroups32();
-#endif /* defined(__NR_setgroups32) && defined(AFS_SPARC64_LINUX20_ENV) */
-#if (defined(__NR_ia32_setgroups32) && defined(AFS_AMD64_LINUX20_ENV))
- extern int afs32_xsetgroups32();
-#endif /* (defined(__NR_ia32_setgroups32) && defined(AFS_AMD64_LINUX20_ENV) */
-#endif /* AFS_SPARC64_LINUX20_ENV || AFS_AMD64_LINUX20_ENV || AFS_PPC64_LINUX20_ENV */
-
-#if !defined(EXPORTED_SYS_CALL_TABLE) || (defined(AFS_AMD64_LINUX20_ENV) && !defined(EXPORTED_IA32_SYS_CALL_TABLE))
- unsigned long *ptr;
- unsigned long offset=0;
- unsigned long datalen=0;
- int ret;
- unsigned long token=0;
- char *mod_name;
- unsigned long mod_start=0;
- unsigned long mod_end=0;
- char *sec_name;
- unsigned long sec_start=0;
- unsigned long sec_end=0;
- char *sym_name;
- unsigned long sym_start=0;
- unsigned long sym_end=0;
-#endif /* EXPORTED_SYS_CALL_TABLE */
-
- RWLOCK_INIT(&afs_xosi, "afs_xosi");
-
-#if !defined(AFS_LINUX24_ENV)
- /* obtain PAGE_OFFSET value */
- afs_linux_page_offset = get_page_offset();
-
-#ifndef AFS_S390_LINUX22_ENV
- if (afs_linux_page_offset == 0) {
- /* couldn't obtain page offset so can't continue */
- printf("afs: Unable to obtain PAGE_OFFSET. Exiting..");
- return -EIO;
- }
-#endif /* AFS_S390_LINUX22_ENV */
-#endif /* !defined(AFS_LINUX24_ENV) */
-
-#ifndef EXPORTED_SYS_CALL_TABLE
- sys_call_table = 0;
-
-#ifdef EXPORTED_KALLSYMS_SYMBOL
- ret = 1;
- token = 0;
- while (ret) {
- sym_start = 0;
- ret =
- kallsyms_symbol_to_address("sys_call_table", &token, &mod_name,
- &mod_start, &mod_end, &sec_name,
- &sec_start, &sec_end, &sym_name,
- &sym_start, &sym_end);
- if (ret && !strcmp(mod_name, "kernel"))
- break;
- }
- if (ret && sym_start) {
- sys_call_table = sym_start;
- }
-#elif defined(EXPORTED_KALLSYMS_ADDRESS)
- ret =
- kallsyms_address_to_symbol((unsigned long)&init_mm, &mod_name,
- &mod_start, &mod_end, &sec_name,
- &sec_start, &sec_end, &sym_name,
- &sym_start, &sym_end);
- ptr = (unsigned long *)sec_start;
- datalen = (sec_end - sec_start) / sizeof(unsigned long);
-#elif defined(AFS_IA64_LINUX20_ENV)
- ptr = (unsigned long *)(&sys_close - 0x180000);
- datalen = 0x180000 / sizeof(ptr);
-#elif defined(AFS_AMD64_LINUX20_ENV)
- ptr = (unsigned long *)&init_mm;
- datalen = 0x360000 / sizeof(ptr);
-#else
- ptr = (unsigned long *)&init_mm;
- datalen = 16384;
-#endif
- for (offset = 0; offset < datalen; ptr++, offset++) {
-#if defined(AFS_IA64_LINUX20_ENV)
- unsigned long close_ip =
- (unsigned long)((struct fptr *)&sys_close)->ip;
- unsigned long chdir_ip =
- (unsigned long)((struct fptr *)&sys_chdir)->ip;
- unsigned long write_ip =
- (unsigned long)((struct fptr *)&sys_write)->ip;
- if (ptr[0] == close_ip && ptr[__NR_chdir - __NR_close] == chdir_ip
- && ptr[__NR_write - __NR_close] == write_ip) {
- sys_call_table = (void *)&(ptr[-1 * (__NR_close - 1024)]);
- break;
- }
-#elif defined(EXPORTED_SYS_WAIT4) && defined(EXPORTED_SYS_CLOSE)
- if (ptr[0] == (unsigned long)&sys_close
- && ptr[__NR_wait4 - __NR_close] == (unsigned long)&sys_wait4) {
- sys_call_table = ptr - __NR_close;
- break;
- }
-#elif defined(EXPORTED_SYS_CHDIR) && defined(EXPORTED_SYS_CLOSE)
- if (ptr[0] == (unsigned long)&sys_close
- && ptr[__NR_chdir - __NR_close] == (unsigned long)&sys_chdir) {
- sys_call_table = ptr - __NR_close;
- break;
- }
-#elif defined(EXPORTED_SYS_OPEN)
- if (ptr[0] == (unsigned long)&sys_exit
- && ptr[__NR_open - __NR_exit] == (unsigned long)&sys_open) {
- sys_call_table = ptr - __NR_exit;
- break;
- }
-#else /* EXPORTED_SYS_OPEN */
- break;
-#endif /* EXPORTED_KALLSYMS_ADDRESS */
- }
-#ifdef EXPORTED_KALLSYMS_ADDRESS
- ret =
- kallsyms_address_to_symbol((unsigned long)sys_call_table, &mod_name,
- &mod_start, &mod_end, &sec_name,
- &sec_start, &sec_end, &sym_name,
- &sym_start, &sym_end);
- if (ret && strcmp(sym_name, "sys_call_table"))
- sys_call_table = 0;
-#endif /* EXPORTED_KALLSYMS_ADDRESS */
- if (!sys_call_table) {
- printf("Failed to find address of sys_call_table\n");
- } else {
- printf("Found sys_call_table at %x\n", sys_call_table);
-#if defined(AFS_SPARC64_LINUX20_ENV) || defined(AFS_S390X_LINUX24_ENV)
- error cant support this yet.;
-#endif /* AFS_SPARC64_LINUX20_ENV */
-#endif /* EXPORTED_SYS_CALL_TABLE */
+ int err;
+ AFS_RWLOCK_INIT(&afs_xosi, "afs_xosi");
-#ifdef AFS_AMD64_LINUX20_ENV
-#ifndef EXPORTED_IA32_SYS_CALL_TABLE
- ia32_sys_call_table = 0;
-#ifdef EXPORTED_KALLSYMS_SYMBOL
- ret = 1;
- token = 0;
- while (ret) {
- sym_start = 0;
- ret = kallsyms_symbol_to_address("ia32_sys_call_table", &token,
- &mod_name, &mod_start, &mod_end,
- &sec_name, &sec_start, &sec_end,
- &sym_name, &sym_start, &sym_end);
- if (ret && !strcmp(mod_name, "kernel"))
- break;
- }
- if (ret && sym_start) {
- ia32_sys_call_table = sym_start;
- }
-#else /* EXPORTED_KALLSYMS_SYMBOL */
-#ifdef EXPORTED_KALLSYMS_ADDRESS
- ret = kallsyms_address_to_symbol((unsigned long)
- &interruptible_sleep_on,
- &mod_name, &mod_start, &mod_end,
- &sec_name, &sec_start, &sec_end,
- &sym_name, &sym_start, &sym_end);
- ptr = (unsigned long *)sec_start;
- datalen = (sec_end - sec_start) / sizeof(unsigned long);
-#else /* EXPORTED_KALLSYMS_ADDRESS */
-#if defined(AFS_AMD64_LINUX20_ENV)
- ptr = (unsigned long *)&interruptible_sleep_on;
- datalen = 0x180000 / sizeof(ptr);
-#else /* AFS_AMD64_LINUX20_ENV */
- ptr = (unsigned long *)&interruptible_sleep_on;
- datalen = 16384;
-#endif /* AFS_AMD64_LINUX20_ENV */
-#endif /* EXPORTED_KALLSYMS_ADDRESS */
- for (offset = 0; offset < datalen; ptr++, offset++) {
- if (ptr[0] == (unsigned long)&sys_exit
- && ptr[__NR_ia32_open - __NR_ia32_exit] ==
- (unsigned long)&sys_open) {
- ia32_sys_call_table = ptr - __NR_ia32_exit;
- break;
- }
- }
-#ifdef EXPORTED_KALLSYMS_ADDRESS
- ret = kallsyms_address_to_symbol((unsigned long)ia32_sys_call_table,
- &mod_name, &mod_start, &mod_end,
- &sec_name, &sec_start, &sec_end,
- &sym_name, &sym_start, &sym_end);
- if (ret && strcmp(sym_name, "ia32_sys_call_table"))
- ia32_sys_call_table = 0;
-#endif /* EXPORTED_KALLSYMS_ADDRESS */
-#endif /* EXPORTED_KALLSYMS_SYMBOL */
- if (!ia32_sys_call_table) {
- printf("Warning: Failed to find address of ia32_sys_call_table\n");
- } else {
- printf("Found ia32_sys_call_table at %x\n", ia32_sys_call_table);
- }
-#else
- printf("Found ia32_sys_call_table at %x\n", ia32_sys_call_table);
-#endif /* IA32_SYS_CALL_TABLE */
+#ifdef HAVE_LINUX_KUID_T
+ afs_ns = afs_current_user_ns();
#endif
- /* Initialize pointers to kernel syscalls. */
-#if !defined(AFS_LINUX24_ENV)
- sys_settimeofdayp = SYSCALL2POINTER sys_call_table[_S(__NR_settimeofday)];
-#endif /* AFS_IA64_LINUX20_ENV */
-
- /* setup AFS entry point. */
- if (
-#if defined(AFS_IA64_LINUX20_ENV)
- SYSCALL2POINTER sys_call_table[__NR_afs_syscall - 1024]
-#else
- SYSCALL2POINTER sys_call_table[_S(__NR_afs_syscall)]
-#endif
- == afs_syscall) {
- printf("AFS syscall entry point already in use!\n");
- return -EBUSY;
- }
-#if defined(AFS_IA64_LINUX20_ENV)
- afs_ni_syscall = sys_call_table[__NR_afs_syscall - 1024];
- sys_call_table[__NR_afs_syscall - 1024] =
- POINTER2SYSCALL((struct fptr *)afs_syscall_stub)->ip;
-#else /* AFS_IA64_LINUX20_ENV */
- afs_ni_syscall = sys_call_table[_S(__NR_afs_syscall)];
- sys_call_table[_S(__NR_afs_syscall)] = POINTER2SYSCALL afs_syscall;
-#ifdef AFS_SPARC64_LINUX20_ENV
- afs_ni_syscall32 = sys_call_table32[__NR_afs_syscall];
- sys_call_table32[__NR_afs_syscall] = POINTER2SYSCALL afs_syscall32;
-#endif
-#endif /* AFS_IA64_LINUX20_ENV */
-#ifdef AFS_AMD64_LINUX20_ENV
- if (ia32_sys_call_table) {
- ia32_ni_syscall = ia32_sys_call_table[__NR_ia32_afs_syscall];
- ia32_sys_call_table[__NR_ia32_afs_syscall] =
- POINTER2SYSCALL afs_syscall;
- }
-#endif /* AFS_S390_LINUX22_ENV */
-#ifndef EXPORTED_SYS_CALL_TABLE
- }
-#endif /* EXPORTED_SYS_CALL_TABLE */
osi_Init();
- register_filesystem(&afs_fs_type);
-
- /* Intercept setgroups calls */
- if (sys_call_table) {
-#if defined(AFS_IA64_LINUX20_ENV)
- sys_setgroupsp = (void *)&sys_setgroups;
-
- ((struct fptr *)sys_setgroupsp)->ip =
- SYSCALL2POINTER sys_call_table[__NR_setgroups - 1024];
- ((struct fptr *)sys_setgroupsp)->gp = kernel_gp;
+#if !defined(AFS_NONFSTRANS)
+ osi_linux_nfssrv_init();
+#endif
- sys_call_table[__NR_setgroups - 1024] =
- POINTER2SYSCALL((struct fptr *)afs_xsetgroups_stub)->ip;
-#else /* AFS_IA64_LINUX20_ENV */
- sys_setgroupsp = SYSCALL2POINTER sys_call_table[_S(__NR_setgroups)];
- sys_call_table[_S(__NR_setgroups)] = POINTER2SYSCALL afs_xsetgroups;
-#ifdef AFS_SPARC64_LINUX20_ENV
- sys32_setgroupsp = SYSCALL2POINTER sys_call_table32[__NR_setgroups];
- sys_call_table32[__NR_setgroups] = POINTER2SYSCALL afs32_xsetgroups;
-#endif /* AFS_SPARC64_LINUX20_ENV */
-#if defined(__NR_setgroups32)
- sys_setgroups32p = SYSCALL2POINTER sys_call_table[__NR_setgroups32];
- sys_call_table[__NR_setgroups32] = POINTER2SYSCALL afs_xsetgroups32;
-#ifdef AFS_SPARC64_LINUX20_ENV
- sys32_setgroups32p =
- SYSCALL2POINTER sys_call_table32[__NR_setgroups32];
- sys_call_table32[__NR_setgroups32] =
- POINTER2SYSCALL afs32_xsetgroups32;
-#endif /* AFS_SPARC64_LINUX20_ENV */
-#endif /* __NR_setgroups32 */
-#ifdef AFS_AMD64_LINUX20_ENV
- if (ia32_sys_call_table) {
- sys32_setgroupsp =
- SYSCALL2POINTER ia32_sys_call_table[__NR_ia32_setgroups];
- ia32_sys_call_table[__NR_ia32_setgroups] =
- POINTER2SYSCALL afs32_xsetgroups;
-#if defined(__NR_ia32_setgroups32)
- sys32_setgroups32p =
- SYSCALL2POINTER ia32_sys_call_table[__NR_ia32_setgroups32];
- ia32_sys_call_table[__NR_ia32_setgroups32] =
- POINTER2SYSCALL afs32_xsetgroups32;
-#endif /* __NR_ia32_setgroups32 */
+ err = osi_syscall_init();
+ if (err)
+ return err;
+ err = afs_init_inodecache();
+ if (err) {
+ osi_syscall_clean();
+ return err;
}
-#endif /* AFS_AMD64_LINUX20_ENV */
-#endif /* AFS_IA64_LINUX20_ENV */
-
+ err = register_filesystem(&afs_fs_type);
+ if (err) {
+ afs_destroy_inodecache();
+ osi_syscall_clean();
+ return err;
}
osi_sysctl_init();
- afsproc_init();
+#ifdef LINUX_KEYRING_SUPPORT
+ osi_keyring_init();
+#endif
+ osi_proc_init();
+ osi_ioctl_init();
+ afs_init_pagecopy();
return 0;
}
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
void __exit
afs_cleanup(void)
-#else
-void
-cleanup_module(void)
-#endif
{
- struct task_struct *t;
+ afs_shutdown_pagecopy();
- osi_sysctl_clean();
- if (sys_call_table) {
-#if defined(AFS_IA64_LINUX20_ENV)
- sys_call_table[__NR_setgroups - 1024] =
- POINTER2SYSCALL((struct fptr *)sys_setgroupsp)->ip;
- sys_call_table[__NR_afs_syscall - 1024] = afs_ni_syscall;
-#else /* AFS_IA64_LINUX20_ENV */
- sys_call_table[_S(__NR_setgroups)] = POINTER2SYSCALL sys_setgroupsp;
- sys_call_table[_S(__NR_afs_syscall)] = afs_ni_syscall;
-# ifdef AFS_SPARC64_LINUX20_ENV
- sys_call_table32[__NR_setgroups] = POINTER2SYSCALL sys32_setgroupsp;
- sys_call_table32[__NR_afs_syscall] = afs_ni_syscall32;
-# endif
-# if defined(__NR_setgroups32)
- sys_call_table[__NR_setgroups32] = POINTER2SYSCALL sys_setgroups32p;
-# ifdef AFS_SPARC64_LINUX20_ENV
- sys_call_table32[__NR_setgroups32] =
- POINTER2SYSCALL sys32_setgroups32p;
-# endif
-# endif
-#endif /* AFS_IA64_LINUX20_ENV */
-#ifdef AFS_AMD64_LINUX20_ENV
- if (ia32_sys_call_table) {
- ia32_sys_call_table[__NR_ia32_setgroups] =
- POINTER2SYSCALL sys32_setgroupsp;
- ia32_sys_call_table[__NR_ia32_afs_syscall] =
- POINTER2SYSCALL ia32_ni_syscall;
-# if defined(__NR_setgroups32)
- ia32_sys_call_table[__NR_ia32_setgroups32] =
- POINTER2SYSCALL sys32_setgroups32p;
-#endif
- }
+#ifdef LINUX_KEYRING_SUPPORT
+ osi_keyring_shutdown();
#endif
- }
+ osi_sysctl_clean();
+ osi_syscall_clean();
unregister_filesystem(&afs_fs_type);
- osi_linux_free_inode_pages(); /* Invalidate all pages using AFS inodes. */
+ afs_destroy_inodecache();
+#if !defined(AFS_NONFSTRANS)
+ osi_linux_nfssrv_shutdown();
+#endif
+ shutdown_osisleep();
osi_linux_free_afs_memory();
- afsproc_exit();
+ osi_ioctl_clean();
+ osi_proc_clean();
+
return;
}
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+MODULE_LICENSE("http://www.openafs.org/dl/license10.html");
module_init(afs_init);
module_exit(afs_cleanup);
-#endif
-
-
-#if !defined(AFS_LINUX24_ENV)
-static long
-get_page_offset(void)
-{
-#if defined(AFS_PPC_LINUX22_ENV) || defined(AFS_SPARC64_LINUX20_ENV) || defined(AFS_SPARC_LINUX20_ENV) || defined(AFS_ALPHA_LINUX20_ENV) || defined(AFS_S390_LINUX22_ENV) || defined(AFS_IA64_LINUX20_ENV) || defined(AFS_PARISC_LINUX24_ENV) || defined(AFS_AMD64_LINUX20_ENV) || defined(AFS_PPC64_LINUX20_ENV)
- return PAGE_OFFSET;
-#else
- struct task_struct *p, *q;
- /* search backward thru the circular list */
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
- read_lock(&tasklist_lock);
-#endif
- /* search backward thru the circular list */
-#ifdef DEFINED_PREV_TASK
- for (q = current; p = q; q = prev_task(p)) {
-#else
- for (p = current; p; p = p->prev_task) {
-#endif
- if (p->pid == 1) {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
- read_unlock(&tasklist_lock);
-#endif
- return p->addr_limit.seg;
- }
- }
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
- read_unlock(&tasklist_lock);
-#endif
- return 0;
-#endif
-}
-#endif /* !AFS_LINUX24_ENV */