2 * Copyright 2000, International Business Machines Corporation and others.
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
10 #include <afsconfig.h>
11 #include "afs/param.h"
18 #include "afs/sysincludes.h" /* Standard vendor system headers */
19 #include "afsincludes.h" /* Afs-based standard headers */
20 #include "afs/afs_stats.h" /* afs statistics */
25 #include "sys/lockl.h"
26 #include "sys/sleep.h"
27 #include "sys/syspest.h"
28 #include "sys/lock_def.h"
29 /*lock_t osi_fsplock = LOCK_AVAIL;*/
32 afs_lock_t osi_fsplock;
36 static struct osi_packet {
37 struct osi_packet *next;
38 } *freePacketList = NULL, *freeSmallList;
39 afs_lock_t osi_flplock;
41 static char memZero; /* address of 0 bytes for kmem_alloc */
49 afs_osi_Alloc(size_t x)
51 #if !defined(AFS_LINUX20_ENV) && !defined(AFS_FBSD_ENV)
52 register struct osimem *tm = NULL;
56 AFS_STATCNT(osi_Alloc);
57 /* 0-length allocs may return NULL ptr from AFS_KALLOC, so we special-case
58 * things so that NULL returned iff an error occurred */
62 AFS_STATS(afs_stats_cmperf.OutStandingAllocs++);
63 AFS_STATS(afs_stats_cmperf.OutStandingMemUsage += x);
64 #ifdef AFS_LINUX20_ENV
65 return osi_linux_alloc(x, 1);
66 #elif defined(AFS_FBSD_ENV)
67 return osi_fbsd_alloc(x, 1);
70 tm = (struct osimem *)AFS_KALLOC(size);
73 osi_Panic("osi_Alloc: Couldn't allocate %d bytes; out of memory!\n",
80 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
83 afs_osi_Alloc_NoSleep(size_t x)
85 register struct osimem *tm;
88 AFS_STATCNT(osi_Alloc);
89 /* 0-length allocs may return NULL ptr from AFS_KALLOC, so we special-case
90 * things so that NULL returned iff an error occurred */
95 AFS_STATS(afs_stats_cmperf.OutStandingAllocs++);
96 AFS_STATS(afs_stats_cmperf.OutStandingMemUsage += x);
97 tm = (struct osimem *)AFS_KALLOC_NOSLEEP(size);
101 #endif /* SUN || SGI */
104 afs_osi_Free(void *x, size_t asize)
106 AFS_STATCNT(osi_Free);
108 return; /* check for putting memZero back */
110 AFS_STATS(afs_stats_cmperf.OutStandingAllocs--);
111 AFS_STATS(afs_stats_cmperf.OutStandingMemUsage -= asize);
112 #if defined(AFS_LINUX20_ENV)
114 #elif defined(AFS_FBSD_ENV)
117 AFS_KFREE((struct osimem *)x, asize);
122 afs_osi_FreeStr(char *x)
124 afs_osi_Free(x, strlen(x) + 1);
129 /* free space allocated by AllocLargeSpace. Also called by mclput when freeing
130 * a packet allocated by osi_NetReceive. */
133 osi_FreeLargeSpace(void *adata)
138 AFS_STATCNT(osi_FreeLargeSpace);
139 afs_stats_cmperf.LargeBlocksActive--;
140 MObtainWriteLock(&osi_flplock, 322);
141 ((struct osi_packet *)adata)->next = freePacketList;
142 freePacketList = adata;
143 MReleaseWriteLock(&osi_flplock);
147 osi_FreeSmallSpace(void *adata)
152 AFS_STATCNT(osi_FreeSmallSpace);
153 afs_stats_cmperf.SmallBlocksActive--;
154 MObtainWriteLock(&osi_fsplock, 323);
155 ((struct osi_packet *)adata)->next = freeSmallList;
156 freeSmallList = adata;
157 MReleaseWriteLock(&osi_fsplock);
161 /* allocate space for sender */
163 osi_AllocLargeSpace(size_t size)
165 register struct osi_packet *tp;
169 AFS_STATCNT(osi_AllocLargeSpace);
170 if (size > AFS_LRALLOCSIZ)
171 osi_Panic("osi_AllocLargeSpace: size=%d\n", size);
172 afs_stats_cmperf.LargeBlocksActive++;
173 if (!freePacketList) {
176 afs_stats_cmperf.LargeBlocksAlloced++;
177 p = (char *)afs_osi_Alloc(AFS_LRALLOCSIZ);
178 #ifdef KERNEL_HAVE_PIN
180 * Need to pin this memory since under heavy conditions this memory
181 * could be swapped out; the problem is that we could inside rx where
182 * interrupts are disabled and thus we would panic if we don't pin it.
184 pin(p, AFS_LRALLOCSIZ);
188 MObtainWriteLock(&osi_flplock, 324);
191 freePacketList = tp->next;
192 MReleaseWriteLock(&osi_flplock);
197 /* allocate space for sender */
199 osi_AllocSmallSpace(size_t size)
201 register struct osi_packet *tp;
203 AFS_STATCNT(osi_AllocSmallSpace);
204 if (size > AFS_SMALLOCSIZ)
205 osi_Panic("osi_AllocSmallS: size=%d\n", size);
207 if (!freeSmallList) {
208 afs_stats_cmperf.SmallBlocksAlloced++;
209 afs_stats_cmperf.SmallBlocksActive++;
210 tp = afs_osi_Alloc(AFS_SMALLOCSIZ);
211 #ifdef KERNEL_HAVE_PIN
212 pin((char *)tp, AFS_SMALLOCSIZ);
216 afs_stats_cmperf.SmallBlocksActive++;
217 MObtainWriteLock(&osi_fsplock, 327);
220 freeSmallList = tp->next;
221 MReleaseWriteLock(&osi_fsplock);
228 shutdown_osinet(void)
230 AFS_STATCNT(shutdown_osinet);
231 if (afs_cold_shutdown) {
232 struct osi_packet *tp;
234 while ((tp = freePacketList)) {
235 freePacketList = tp->next;
236 afs_osi_Free(tp, AFS_LRALLOCSIZ);
237 #ifdef KERNEL_HAVE_PIN
238 unpin(tp, AFS_LRALLOCSIZ);
242 while ((tp = freeSmallList)) {
243 freeSmallList = tp->next;
244 afs_osi_Free(tp, AFS_SMALLOCSIZ);
245 #ifdef KERNEL_HAVE_PIN
246 unpin(tp, AFS_SMALLOCSIZ);
249 LOCK_INIT(&osi_fsplock, "osi_fsplock");
250 LOCK_INIT(&osi_flplock, "osi_flplock");
252 if (afs_stats_cmperf.LargeBlocksActive ||
253 afs_stats_cmperf.SmallBlocksActive)
255 afs_warn("WARNING: not all blocks freed: large %d small %d\n",
256 afs_stats_cmperf.LargeBlocksActive,
257 afs_stats_cmperf.SmallBlocksActive);