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Changeset 11cdbeb in rtems
- Timestamp:
- May 27, 1999, 6:03:50 PM (22 years ago)
- Branches:
- 4.10, 4.11, 4.8, 4.9, 5, master
- Children:
- af84b968
- Parents:
- 1c841bd2
- Files:
-
- 12 edited
-
c/src/exec/libnetworking/kern/uipc_mbuf.c (modified) (2 diffs)
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c/src/exec/libnetworking/rtems/rtems_glue.c (modified) (3 diffs)
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c/src/exec/libnetworking/sys/mbuf.h (modified) (1 diff)
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c/src/lib/libnetworking/kern/uipc_mbuf.c (modified) (2 diffs)
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c/src/lib/libnetworking/rtems/rtems_glue.c (modified) (3 diffs)
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c/src/lib/libnetworking/sys/mbuf.h (modified) (1 diff)
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c/src/libnetworking/kern/uipc_mbuf.c (modified) (2 diffs)
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c/src/libnetworking/rtems/rtems_glue.c (modified) (3 diffs)
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c/src/libnetworking/sys/mbuf.h (modified) (1 diff)
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cpukit/libnetworking/kern/uipc_mbuf.c (modified) (2 diffs)
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cpukit/libnetworking/rtems/rtems_glue.c (modified) (3 diffs)
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cpukit/libnetworking/sys/mbuf.h (modified) (1 diff)
Legend:
- Unmodified
- Added
- Removed
-
c/src/exec/libnetworking/kern/uipc_mbuf.c
r1c841bd2 r11cdbeb 64 64 int max_datalen; 65 65 66 static void m_reclaim __P((void));67 68 66 /* "number of clusters of pages" */ 69 67 #define NCL_INIT 1 70 68 71 69 #define NMB_INIT 16 72 73 /* ARGSUSED*/74 static void75 mbinit(dummy)76 void *dummy;77 {78 int s;79 80 mmbfree = NULL; mclfree = NULL;81 s = splimp();82 if (m_mballoc(NMB_INIT, M_DONTWAIT) == 0)83 goto bad;84 if (m_clalloc(NCL_INIT, M_DONTWAIT) == 0)85 goto bad;86 splx(s);87 return;88 bad:89 panic("mbinit");90 }91 92 /*93 * Allocate at least nmb mbufs and place on mbuf free list.94 * Must be called at splimp.95 */96 /* ARGSUSED */97 int98 m_mballoc(nmb, nowait)99 register int nmb;100 int nowait;101 {102 register caddr_t p;103 register int i;104 int nbytes;105 106 /* Once we run out of map space, it will be impossible to get107 * any more (nothing is ever freed back to the map) (XXX which108 * is dumb). (however you are not dead as m_reclaim might109 * still be able to free a substantial amount of space).110 */111 if (mb_map_full)112 return (0);113 114 nbytes = round_page(nmb * MSIZE);115 p = (caddr_t)kmem_malloc(mb_map, nbytes, nowait ? M_NOWAIT : M_WAITOK);116 /*117 * Either the map is now full, or this is nowait and there118 * are no pages left.119 */120 if (p == NULL)121 return (0);122 123 nmb = nbytes / MSIZE;124 for (i = 0; i < nmb; i++) {125 ((struct mbuf *)p)->m_next = mmbfree;126 mmbfree = (struct mbuf *)p;127 p += MSIZE;128 }129 mbstat.m_mbufs += nmb;130 return (1);131 }132 133 /*134 * Allocate some number of mbuf clusters135 * and place on cluster free list.136 * Must be called at splimp.137 */138 /* ARGSUSED */139 int140 m_clalloc(ncl, nowait)141 register int ncl;142 int nowait;143 {144 register caddr_t p;145 register int i;146 147 /*148 * Once we run out of map space, it will be impossible149 * to get any more (nothing is ever freed back to the150 * map).151 */152 if (mb_map_full)153 return (0);154 155 p = (caddr_t)kmem_malloc(mb_map, ncl*MCLBYTES,156 nowait ? M_NOWAIT : M_WAITOK);157 /*158 * Either the map is now full, or this is nowait and there159 * are no pages left.160 */161 if (p == NULL)162 return (0);163 164 for (i = 0; i < ncl; i++) {165 ((union mcluster *)p)->mcl_next = mclfree;166 mclfree = (union mcluster *)p;167 p += MCLBYTES;168 mbstat.m_clfree++;169 }170 mbstat.m_clusters += ncl;171 return (1);172 }173 70 174 71 /* … … 213 110 } 214 111 215 staticvoid216 m_reclaim( )112 void 113 m_reclaim(void) 217 114 { 218 115 register struct domain *dp; -
c/src/exec/libnetworking/rtems/rtems_glue.c
r1c841bd2 r11cdbeb 127 127 /* 128 128 * Do the initializations required by the BSD code 129 * FIXME: Maybe we should use a different memory allocation scheme that130 * would let us share space between mbufs and mbuf clusters.131 * For now, we'll just take the easy way out!132 129 */ 133 130 static void 134 131 bsd_init () 135 132 { 136 /* 137 * Set up mbuf data strutures 138 * Cluster allocation *must* come first -- see comment on kmem_malloc(). 139 */ 140 m_clalloc (nmbclusters, M_DONTWAIT); 133 int i; 134 char *p; 135 136 /* 137 * Set up mbuf cluster data strutures 138 */ 139 p = malloc ((nmbclusters*MCLBYTES)+MCLBYTES-1); 140 p = (char *)(((unsigned long)p + (MCLBYTES-1)) & ~(MCLBYTES-1)); 141 if (p == NULL) 142 rtems_panic ("Can't get network cluster memory."); 143 mbutl = (struct mbuf *)p; 144 for (i = 0; i < nmbclusters; i++) { 145 ((union mcluster *)p)->mcl_next = mclfree; 146 mclfree = (union mcluster *)p; 147 p += MCLBYTES; 148 mbstat.m_clfree++; 149 } 150 mbstat.m_clusters = nmbclusters; 141 151 mclrefcnt = malloc (nmbclusters); 142 152 if (mclrefcnt == NULL) 143 rtems_panic (" No memory for mbuf cluster reference counts.");153 rtems_panic ("Can't get mbuf cluster reference counts memory."); 144 154 memset (mclrefcnt, '\0', nmbclusters); 145 m_mballoc (nmbuf, M_DONTWAIT); 155 156 /* 157 * Set up mbuf data structures 158 */ 159 160 p = malloc(nmbuf * MSIZE); 161 if (p == NULL) 162 rtems_panic ("Can't get network memory."); 163 for (i = 0; i < nmbuf; i++) { 164 ((struct mbuf *)p)->m_next = mmbfree; 165 mmbfree = (struct mbuf *)p; 166 p += MSIZE; 167 } 168 mbstat.m_mbufs = nmbuf; 146 169 mbstat.m_mtypes[MT_FREE] = nmbuf; 147 148 170 149 171 /* … … 664 686 665 687 /* 666 * Hack alert: kmem_malloc `knows' that its667 * first invocation is to get mbuf clusters!668 */669 int mb_map_full;670 vm_map_t mb_map;671 vm_offset_t672 kmem_malloc (vm_map_t *map, vm_size_t size, boolean_t waitflag)673 {674 void *p;675 676 /*677 * Can't get memory if we're already running.678 */679 if (networkDaemonTid) {680 if (waitflag == M_WAITOK)681 rtems_panic (682 "Network mbuf space can not be enlarged after rtems_bsdnet_initialize() has\n"683 "returned. Enlarge the initial mbuf/cluster size in rtems_bsdnet_config.");684 return 0;685 }686 687 #define ROUNDSIZE 2048688 p = malloc (size+ROUNDSIZE);689 p = (void *)((unsigned long)p & ~(ROUNDSIZE-1));690 if ((p == NULL) && (waitflag == M_WAITOK))691 rtems_panic ("Can't get initial network memory!");692 if (mbutl == NULL)693 mbutl = p;694 return (vm_offset_t)p;695 }696 697 /*698 688 * IP header checksum routine for processors which don't have an inline version 699 689 */ 700 701 690 u_int 702 691 in_cksum_hdr (const void *ip) … … 927 916 return -1; 928 917 } 918 919 /* 920 * Handle requests for more network memory 921 * XXX: Another possibility would be to use a semaphore here with 922 * a release in the mbuf free macro. I have chosen this `polling' 923 * approach because: 924 * 1) It is simpler. 925 * 2) It adds no complexity to the free macro. 926 * 3) Running out of mbufs should be a rare 927 * condition -- predeployment testing of 928 * an application should indicate the 929 * required mbuf pool size. 930 * XXX: Should there be a panic if a task is stuck in the loop for 931 * more than a minute or so? 932 */ 933 int 934 m_mballoc (int nmb, int nowait) 935 { 936 if (nowait) 937 return 0; 938 m_reclaim (); 939 if (mmbfree == NULL) { 940 mbstat.m_wait++; 941 do { 942 rtems_bsdnet_semaphore_release (); 943 rtems_task_wake_after (1); 944 rtems_bsdnet_semaphore_obtain (); 945 } while (mmbfree == NULL); 946 } 947 else { 948 mbstat.m_drops++; 949 } 950 return 1; 951 } 952 953 int 954 m_clalloc(ncl, nowait) 955 { 956 if (nowait) 957 return 0; 958 m_reclaim (); 959 if (mclfree == NULL) { 960 mbstat.m_wait++; 961 do { 962 rtems_bsdnet_semaphore_release (); 963 rtems_task_wake_after (1); 964 rtems_bsdnet_semaphore_obtain (); 965 } while (mclfree == NULL); 966 } 967 else { 968 mbstat.m_drops++; 969 } 970 return 1; 971 } -
c/src/exec/libnetworking/sys/mbuf.h
r1c841bd2 r11cdbeb 411 411 void m_copydata __P((struct mbuf *,int,int,caddr_t)); 412 412 void m_freem __P((struct mbuf *)); 413 void m_reclaim __P((void)); 413 414 414 415 #ifdef MBTYPES -
c/src/lib/libnetworking/kern/uipc_mbuf.c
r1c841bd2 r11cdbeb 64 64 int max_datalen; 65 65 66 static void m_reclaim __P((void));67 68 66 /* "number of clusters of pages" */ 69 67 #define NCL_INIT 1 70 68 71 69 #define NMB_INIT 16 72 73 /* ARGSUSED*/74 static void75 mbinit(dummy)76 void *dummy;77 {78 int s;79 80 mmbfree = NULL; mclfree = NULL;81 s = splimp();82 if (m_mballoc(NMB_INIT, M_DONTWAIT) == 0)83 goto bad;84 if (m_clalloc(NCL_INIT, M_DONTWAIT) == 0)85 goto bad;86 splx(s);87 return;88 bad:89 panic("mbinit");90 }91 92 /*93 * Allocate at least nmb mbufs and place on mbuf free list.94 * Must be called at splimp.95 */96 /* ARGSUSED */97 int98 m_mballoc(nmb, nowait)99 register int nmb;100 int nowait;101 {102 register caddr_t p;103 register int i;104 int nbytes;105 106 /* Once we run out of map space, it will be impossible to get107 * any more (nothing is ever freed back to the map) (XXX which108 * is dumb). (however you are not dead as m_reclaim might109 * still be able to free a substantial amount of space).110 */111 if (mb_map_full)112 return (0);113 114 nbytes = round_page(nmb * MSIZE);115 p = (caddr_t)kmem_malloc(mb_map, nbytes, nowait ? M_NOWAIT : M_WAITOK);116 /*117 * Either the map is now full, or this is nowait and there118 * are no pages left.119 */120 if (p == NULL)121 return (0);122 123 nmb = nbytes / MSIZE;124 for (i = 0; i < nmb; i++) {125 ((struct mbuf *)p)->m_next = mmbfree;126 mmbfree = (struct mbuf *)p;127 p += MSIZE;128 }129 mbstat.m_mbufs += nmb;130 return (1);131 }132 133 /*134 * Allocate some number of mbuf clusters135 * and place on cluster free list.136 * Must be called at splimp.137 */138 /* ARGSUSED */139 int140 m_clalloc(ncl, nowait)141 register int ncl;142 int nowait;143 {144 register caddr_t p;145 register int i;146 147 /*148 * Once we run out of map space, it will be impossible149 * to get any more (nothing is ever freed back to the150 * map).151 */152 if (mb_map_full)153 return (0);154 155 p = (caddr_t)kmem_malloc(mb_map, ncl*MCLBYTES,156 nowait ? M_NOWAIT : M_WAITOK);157 /*158 * Either the map is now full, or this is nowait and there159 * are no pages left.160 */161 if (p == NULL)162 return (0);163 164 for (i = 0; i < ncl; i++) {165 ((union mcluster *)p)->mcl_next = mclfree;166 mclfree = (union mcluster *)p;167 p += MCLBYTES;168 mbstat.m_clfree++;169 }170 mbstat.m_clusters += ncl;171 return (1);172 }173 70 174 71 /* … … 213 110 } 214 111 215 staticvoid216 m_reclaim( )112 void 113 m_reclaim(void) 217 114 { 218 115 register struct domain *dp; -
c/src/lib/libnetworking/rtems/rtems_glue.c
r1c841bd2 r11cdbeb 127 127 /* 128 128 * Do the initializations required by the BSD code 129 * FIXME: Maybe we should use a different memory allocation scheme that130 * would let us share space between mbufs and mbuf clusters.131 * For now, we'll just take the easy way out!132 129 */ 133 130 static void 134 131 bsd_init () 135 132 { 136 /* 137 * Set up mbuf data strutures 138 * Cluster allocation *must* come first -- see comment on kmem_malloc(). 139 */ 140 m_clalloc (nmbclusters, M_DONTWAIT); 133 int i; 134 char *p; 135 136 /* 137 * Set up mbuf cluster data strutures 138 */ 139 p = malloc ((nmbclusters*MCLBYTES)+MCLBYTES-1); 140 p = (char *)(((unsigned long)p + (MCLBYTES-1)) & ~(MCLBYTES-1)); 141 if (p == NULL) 142 rtems_panic ("Can't get network cluster memory."); 143 mbutl = (struct mbuf *)p; 144 for (i = 0; i < nmbclusters; i++) { 145 ((union mcluster *)p)->mcl_next = mclfree; 146 mclfree = (union mcluster *)p; 147 p += MCLBYTES; 148 mbstat.m_clfree++; 149 } 150 mbstat.m_clusters = nmbclusters; 141 151 mclrefcnt = malloc (nmbclusters); 142 152 if (mclrefcnt == NULL) 143 rtems_panic (" No memory for mbuf cluster reference counts.");153 rtems_panic ("Can't get mbuf cluster reference counts memory."); 144 154 memset (mclrefcnt, '\0', nmbclusters); 145 m_mballoc (nmbuf, M_DONTWAIT); 155 156 /* 157 * Set up mbuf data structures 158 */ 159 160 p = malloc(nmbuf * MSIZE); 161 if (p == NULL) 162 rtems_panic ("Can't get network memory."); 163 for (i = 0; i < nmbuf; i++) { 164 ((struct mbuf *)p)->m_next = mmbfree; 165 mmbfree = (struct mbuf *)p; 166 p += MSIZE; 167 } 168 mbstat.m_mbufs = nmbuf; 146 169 mbstat.m_mtypes[MT_FREE] = nmbuf; 147 148 170 149 171 /* … … 664 686 665 687 /* 666 * Hack alert: kmem_malloc `knows' that its667 * first invocation is to get mbuf clusters!668 */669 int mb_map_full;670 vm_map_t mb_map;671 vm_offset_t672 kmem_malloc (vm_map_t *map, vm_size_t size, boolean_t waitflag)673 {674 void *p;675 676 /*677 * Can't get memory if we're already running.678 */679 if (networkDaemonTid) {680 if (waitflag == M_WAITOK)681 rtems_panic (682 "Network mbuf space can not be enlarged after rtems_bsdnet_initialize() has\n"683 "returned. Enlarge the initial mbuf/cluster size in rtems_bsdnet_config.");684 return 0;685 }686 687 #define ROUNDSIZE 2048688 p = malloc (size+ROUNDSIZE);689 p = (void *)((unsigned long)p & ~(ROUNDSIZE-1));690 if ((p == NULL) && (waitflag == M_WAITOK))691 rtems_panic ("Can't get initial network memory!");692 if (mbutl == NULL)693 mbutl = p;694 return (vm_offset_t)p;695 }696 697 /*698 688 * IP header checksum routine for processors which don't have an inline version 699 689 */ 700 701 690 u_int 702 691 in_cksum_hdr (const void *ip) … … 927 916 return -1; 928 917 } 918 919 /* 920 * Handle requests for more network memory 921 * XXX: Another possibility would be to use a semaphore here with 922 * a release in the mbuf free macro. I have chosen this `polling' 923 * approach because: 924 * 1) It is simpler. 925 * 2) It adds no complexity to the free macro. 926 * 3) Running out of mbufs should be a rare 927 * condition -- predeployment testing of 928 * an application should indicate the 929 * required mbuf pool size. 930 * XXX: Should there be a panic if a task is stuck in the loop for 931 * more than a minute or so? 932 */ 933 int 934 m_mballoc (int nmb, int nowait) 935 { 936 if (nowait) 937 return 0; 938 m_reclaim (); 939 if (mmbfree == NULL) { 940 mbstat.m_wait++; 941 do { 942 rtems_bsdnet_semaphore_release (); 943 rtems_task_wake_after (1); 944 rtems_bsdnet_semaphore_obtain (); 945 } while (mmbfree == NULL); 946 } 947 else { 948 mbstat.m_drops++; 949 } 950 return 1; 951 } 952 953 int 954 m_clalloc(ncl, nowait) 955 { 956 if (nowait) 957 return 0; 958 m_reclaim (); 959 if (mclfree == NULL) { 960 mbstat.m_wait++; 961 do { 962 rtems_bsdnet_semaphore_release (); 963 rtems_task_wake_after (1); 964 rtems_bsdnet_semaphore_obtain (); 965 } while (mclfree == NULL); 966 } 967 else { 968 mbstat.m_drops++; 969 } 970 return 1; 971 } -
c/src/lib/libnetworking/sys/mbuf.h
r1c841bd2 r11cdbeb 411 411 void m_copydata __P((struct mbuf *,int,int,caddr_t)); 412 412 void m_freem __P((struct mbuf *)); 413 void m_reclaim __P((void)); 413 414 414 415 #ifdef MBTYPES -
c/src/libnetworking/kern/uipc_mbuf.c
r1c841bd2 r11cdbeb 64 64 int max_datalen; 65 65 66 static void m_reclaim __P((void));67 68 66 /* "number of clusters of pages" */ 69 67 #define NCL_INIT 1 70 68 71 69 #define NMB_INIT 16 72 73 /* ARGSUSED*/74 static void75 mbinit(dummy)76 void *dummy;77 {78 int s;79 80 mmbfree = NULL; mclfree = NULL;81 s = splimp();82 if (m_mballoc(NMB_INIT, M_DONTWAIT) == 0)83 goto bad;84 if (m_clalloc(NCL_INIT, M_DONTWAIT) == 0)85 goto bad;86 splx(s);87 return;88 bad:89 panic("mbinit");90 }91 92 /*93 * Allocate at least nmb mbufs and place on mbuf free list.94 * Must be called at splimp.95 */96 /* ARGSUSED */97 int98 m_mballoc(nmb, nowait)99 register int nmb;100 int nowait;101 {102 register caddr_t p;103 register int i;104 int nbytes;105 106 /* Once we run out of map space, it will be impossible to get107 * any more (nothing is ever freed back to the map) (XXX which108 * is dumb). (however you are not dead as m_reclaim might109 * still be able to free a substantial amount of space).110 */111 if (mb_map_full)112 return (0);113 114 nbytes = round_page(nmb * MSIZE);115 p = (caddr_t)kmem_malloc(mb_map, nbytes, nowait ? M_NOWAIT : M_WAITOK);116 /*117 * Either the map is now full, or this is nowait and there118 * are no pages left.119 */120 if (p == NULL)121 return (0);122 123 nmb = nbytes / MSIZE;124 for (i = 0; i < nmb; i++) {125 ((struct mbuf *)p)->m_next = mmbfree;126 mmbfree = (struct mbuf *)p;127 p += MSIZE;128 }129 mbstat.m_mbufs += nmb;130 return (1);131 }132 133 /*134 * Allocate some number of mbuf clusters135 * and place on cluster free list.136 * Must be called at splimp.137 */138 /* ARGSUSED */139 int140 m_clalloc(ncl, nowait)141 register int ncl;142 int nowait;143 {144 register caddr_t p;145 register int i;146 147 /*148 * Once we run out of map space, it will be impossible149 * to get any more (nothing is ever freed back to the150 * map).151 */152 if (mb_map_full)153 return (0);154 155 p = (caddr_t)kmem_malloc(mb_map, ncl*MCLBYTES,156 nowait ? M_NOWAIT : M_WAITOK);157 /*158 * Either the map is now full, or this is nowait and there159 * are no pages left.160 */161 if (p == NULL)162 return (0);163 164 for (i = 0; i < ncl; i++) {165 ((union mcluster *)p)->mcl_next = mclfree;166 mclfree = (union mcluster *)p;167 p += MCLBYTES;168 mbstat.m_clfree++;169 }170 mbstat.m_clusters += ncl;171 return (1);172 }173 70 174 71 /* … … 213 110 } 214 111 215 staticvoid216 m_reclaim( )112 void 113 m_reclaim(void) 217 114 { 218 115 register struct domain *dp; -
c/src/libnetworking/rtems/rtems_glue.c
r1c841bd2 r11cdbeb 127 127 /* 128 128 * Do the initializations required by the BSD code 129 * FIXME: Maybe we should use a different memory allocation scheme that130 * would let us share space between mbufs and mbuf clusters.131 * For now, we'll just take the easy way out!132 129 */ 133 130 static void 134 131 bsd_init () 135 132 { 136 /* 137 * Set up mbuf data strutures 138 * Cluster allocation *must* come first -- see comment on kmem_malloc(). 139 */ 140 m_clalloc (nmbclusters, M_DONTWAIT); 133 int i; 134 char *p; 135 136 /* 137 * Set up mbuf cluster data strutures 138 */ 139 p = malloc ((nmbclusters*MCLBYTES)+MCLBYTES-1); 140 p = (char *)(((unsigned long)p + (MCLBYTES-1)) & ~(MCLBYTES-1)); 141 if (p == NULL) 142 rtems_panic ("Can't get network cluster memory."); 143 mbutl = (struct mbuf *)p; 144 for (i = 0; i < nmbclusters; i++) { 145 ((union mcluster *)p)->mcl_next = mclfree; 146 mclfree = (union mcluster *)p; 147 p += MCLBYTES; 148 mbstat.m_clfree++; 149 } 150 mbstat.m_clusters = nmbclusters; 141 151 mclrefcnt = malloc (nmbclusters); 142 152 if (mclrefcnt == NULL) 143 rtems_panic (" No memory for mbuf cluster reference counts.");153 rtems_panic ("Can't get mbuf cluster reference counts memory."); 144 154 memset (mclrefcnt, '\0', nmbclusters); 145 m_mballoc (nmbuf, M_DONTWAIT); 155 156 /* 157 * Set up mbuf data structures 158 */ 159 160 p = malloc(nmbuf * MSIZE); 161 if (p == NULL) 162 rtems_panic ("Can't get network memory."); 163 for (i = 0; i < nmbuf; i++) { 164 ((struct mbuf *)p)->m_next = mmbfree; 165 mmbfree = (struct mbuf *)p; 166 p += MSIZE; 167 } 168 mbstat.m_mbufs = nmbuf; 146 169 mbstat.m_mtypes[MT_FREE] = nmbuf; 147 148 170 149 171 /* … … 664 686 665 687 /* 666 * Hack alert: kmem_malloc `knows' that its667 * first invocation is to get mbuf clusters!668 */669 int mb_map_full;670 vm_map_t mb_map;671 vm_offset_t672 kmem_malloc (vm_map_t *map, vm_size_t size, boolean_t waitflag)673 {674 void *p;675 676 /*677 * Can't get memory if we're already running.678 */679 if (networkDaemonTid) {680 if (waitflag == M_WAITOK)681 rtems_panic (682 "Network mbuf space can not be enlarged after rtems_bsdnet_initialize() has\n"683 "returned. Enlarge the initial mbuf/cluster size in rtems_bsdnet_config.");684 return 0;685 }686 687 #define ROUNDSIZE 2048688 p = malloc (size+ROUNDSIZE);689 p = (void *)((unsigned long)p & ~(ROUNDSIZE-1));690 if ((p == NULL) && (waitflag == M_WAITOK))691 rtems_panic ("Can't get initial network memory!");692 if (mbutl == NULL)693 mbutl = p;694 return (vm_offset_t)p;695 }696 697 /*698 688 * IP header checksum routine for processors which don't have an inline version 699 689 */ 700 701 690 u_int 702 691 in_cksum_hdr (const void *ip) … … 927 916 return -1; 928 917 } 918 919 /* 920 * Handle requests for more network memory 921 * XXX: Another possibility would be to use a semaphore here with 922 * a release in the mbuf free macro. I have chosen this `polling' 923 * approach because: 924 * 1) It is simpler. 925 * 2) It adds no complexity to the free macro. 926 * 3) Running out of mbufs should be a rare 927 * condition -- predeployment testing of 928 * an application should indicate the 929 * required mbuf pool size. 930 * XXX: Should there be a panic if a task is stuck in the loop for 931 * more than a minute or so? 932 */ 933 int 934 m_mballoc (int nmb, int nowait) 935 { 936 if (nowait) 937 return 0; 938 m_reclaim (); 939 if (mmbfree == NULL) { 940 mbstat.m_wait++; 941 do { 942 rtems_bsdnet_semaphore_release (); 943 rtems_task_wake_after (1); 944 rtems_bsdnet_semaphore_obtain (); 945 } while (mmbfree == NULL); 946 } 947 else { 948 mbstat.m_drops++; 949 } 950 return 1; 951 } 952 953 int 954 m_clalloc(ncl, nowait) 955 { 956 if (nowait) 957 return 0; 958 m_reclaim (); 959 if (mclfree == NULL) { 960 mbstat.m_wait++; 961 do { 962 rtems_bsdnet_semaphore_release (); 963 rtems_task_wake_after (1); 964 rtems_bsdnet_semaphore_obtain (); 965 } while (mclfree == NULL); 966 } 967 else { 968 mbstat.m_drops++; 969 } 970 return 1; 971 } -
c/src/libnetworking/sys/mbuf.h
r1c841bd2 r11cdbeb 411 411 void m_copydata __P((struct mbuf *,int,int,caddr_t)); 412 412 void m_freem __P((struct mbuf *)); 413 void m_reclaim __P((void)); 413 414 414 415 #ifdef MBTYPES -
cpukit/libnetworking/kern/uipc_mbuf.c
r1c841bd2 r11cdbeb 64 64 int max_datalen; 65 65 66 static void m_reclaim __P((void));67 68 66 /* "number of clusters of pages" */ 69 67 #define NCL_INIT 1 70 68 71 69 #define NMB_INIT 16 72 73 /* ARGSUSED*/74 static void75 mbinit(dummy)76 void *dummy;77 {78 int s;79 80 mmbfree = NULL; mclfree = NULL;81 s = splimp();82 if (m_mballoc(NMB_INIT, M_DONTWAIT) == 0)83 goto bad;84 if (m_clalloc(NCL_INIT, M_DONTWAIT) == 0)85 goto bad;86 splx(s);87 return;88 bad:89 panic("mbinit");90 }91 92 /*93 * Allocate at least nmb mbufs and place on mbuf free list.94 * Must be called at splimp.95 */96 /* ARGSUSED */97 int98 m_mballoc(nmb, nowait)99 register int nmb;100 int nowait;101 {102 register caddr_t p;103 register int i;104 int nbytes;105 106 /* Once we run out of map space, it will be impossible to get107 * any more (nothing is ever freed back to the map) (XXX which108 * is dumb). (however you are not dead as m_reclaim might109 * still be able to free a substantial amount of space).110 */111 if (mb_map_full)112 return (0);113 114 nbytes = round_page(nmb * MSIZE);115 p = (caddr_t)kmem_malloc(mb_map, nbytes, nowait ? M_NOWAIT : M_WAITOK);116 /*117 * Either the map is now full, or this is nowait and there118 * are no pages left.119 */120 if (p == NULL)121 return (0);122 123 nmb = nbytes / MSIZE;124 for (i = 0; i < nmb; i++) {125 ((struct mbuf *)p)->m_next = mmbfree;126 mmbfree = (struct mbuf *)p;127 p += MSIZE;128 }129 mbstat.m_mbufs += nmb;130 return (1);131 }132 133 /*134 * Allocate some number of mbuf clusters135 * and place on cluster free list.136 * Must be called at splimp.137 */138 /* ARGSUSED */139 int140 m_clalloc(ncl, nowait)141 register int ncl;142 int nowait;143 {144 register caddr_t p;145 register int i;146 147 /*148 * Once we run out of map space, it will be impossible149 * to get any more (nothing is ever freed back to the150 * map).151 */152 if (mb_map_full)153 return (0);154 155 p = (caddr_t)kmem_malloc(mb_map, ncl*MCLBYTES,156 nowait ? M_NOWAIT : M_WAITOK);157 /*158 * Either the map is now full, or this is nowait and there159 * are no pages left.160 */161 if (p == NULL)162 return (0);163 164 for (i = 0; i < ncl; i++) {165 ((union mcluster *)p)->mcl_next = mclfree;166 mclfree = (union mcluster *)p;167 p += MCLBYTES;168 mbstat.m_clfree++;169 }170 mbstat.m_clusters += ncl;171 return (1);172 }173 70 174 71 /* … … 213 110 } 214 111 215 staticvoid216 m_reclaim( )112 void 113 m_reclaim(void) 217 114 { 218 115 register struct domain *dp; -
cpukit/libnetworking/rtems/rtems_glue.c
r1c841bd2 r11cdbeb 127 127 /* 128 128 * Do the initializations required by the BSD code 129 * FIXME: Maybe we should use a different memory allocation scheme that130 * would let us share space between mbufs and mbuf clusters.131 * For now, we'll just take the easy way out!132 129 */ 133 130 static void 134 131 bsd_init () 135 132 { 136 /* 137 * Set up mbuf data strutures 138 * Cluster allocation *must* come first -- see comment on kmem_malloc(). 139 */ 140 m_clalloc (nmbclusters, M_DONTWAIT); 133 int i; 134 char *p; 135 136 /* 137 * Set up mbuf cluster data strutures 138 */ 139 p = malloc ((nmbclusters*MCLBYTES)+MCLBYTES-1); 140 p = (char *)(((unsigned long)p + (MCLBYTES-1)) & ~(MCLBYTES-1)); 141 if (p == NULL) 142 rtems_panic ("Can't get network cluster memory."); 143 mbutl = (struct mbuf *)p; 144 for (i = 0; i < nmbclusters; i++) { 145 ((union mcluster *)p)->mcl_next = mclfree; 146 mclfree = (union mcluster *)p; 147 p += MCLBYTES; 148 mbstat.m_clfree++; 149 } 150 mbstat.m_clusters = nmbclusters; 141 151 mclrefcnt = malloc (nmbclusters); 142 152 if (mclrefcnt == NULL) 143 rtems_panic (" No memory for mbuf cluster reference counts.");153 rtems_panic ("Can't get mbuf cluster reference counts memory."); 144 154 memset (mclrefcnt, '\0', nmbclusters); 145 m_mballoc (nmbuf, M_DONTWAIT); 155 156 /* 157 * Set up mbuf data structures 158 */ 159 160 p = malloc(nmbuf * MSIZE); 161 if (p == NULL) 162 rtems_panic ("Can't get network memory."); 163 for (i = 0; i < nmbuf; i++) { 164 ((struct mbuf *)p)->m_next = mmbfree; 165 mmbfree = (struct mbuf *)p; 166 p += MSIZE; 167 } 168 mbstat.m_mbufs = nmbuf; 146 169 mbstat.m_mtypes[MT_FREE] = nmbuf; 147 148 170 149 171 /* … … 664 686 665 687 /* 666 * Hack alert: kmem_malloc `knows' that its667 * first invocation is to get mbuf clusters!668 */669 int mb_map_full;670 vm_map_t mb_map;671 vm_offset_t672 kmem_malloc (vm_map_t *map, vm_size_t size, boolean_t waitflag)673 {674 void *p;675 676 /*677 * Can't get memory if we're already running.678 */679 if (networkDaemonTid) {680 if (waitflag == M_WAITOK)681 rtems_panic (682 "Network mbuf space can not be enlarged after rtems_bsdnet_initialize() has\n"683 "returned. Enlarge the initial mbuf/cluster size in rtems_bsdnet_config.");684 return 0;685 }686 687 #define ROUNDSIZE 2048688 p = malloc (size+ROUNDSIZE);689 p = (void *)((unsigned long)p & ~(ROUNDSIZE-1));690 if ((p == NULL) && (waitflag == M_WAITOK))691 rtems_panic ("Can't get initial network memory!");692 if (mbutl == NULL)693 mbutl = p;694 return (vm_offset_t)p;695 }696 697 /*698 688 * IP header checksum routine for processors which don't have an inline version 699 689 */ 700 701 690 u_int 702 691 in_cksum_hdr (const void *ip) … … 927 916 return -1; 928 917 } 918 919 /* 920 * Handle requests for more network memory 921 * XXX: Another possibility would be to use a semaphore here with 922 * a release in the mbuf free macro. I have chosen this `polling' 923 * approach because: 924 * 1) It is simpler. 925 * 2) It adds no complexity to the free macro. 926 * 3) Running out of mbufs should be a rare 927 * condition -- predeployment testing of 928 * an application should indicate the 929 * required mbuf pool size. 930 * XXX: Should there be a panic if a task is stuck in the loop for 931 * more than a minute or so? 932 */ 933 int 934 m_mballoc (int nmb, int nowait) 935 { 936 if (nowait) 937 return 0; 938 m_reclaim (); 939 if (mmbfree == NULL) { 940 mbstat.m_wait++; 941 do { 942 rtems_bsdnet_semaphore_release (); 943 rtems_task_wake_after (1); 944 rtems_bsdnet_semaphore_obtain (); 945 } while (mmbfree == NULL); 946 } 947 else { 948 mbstat.m_drops++; 949 } 950 return 1; 951 } 952 953 int 954 m_clalloc(ncl, nowait) 955 { 956 if (nowait) 957 return 0; 958 m_reclaim (); 959 if (mclfree == NULL) { 960 mbstat.m_wait++; 961 do { 962 rtems_bsdnet_semaphore_release (); 963 rtems_task_wake_after (1); 964 rtems_bsdnet_semaphore_obtain (); 965 } while (mclfree == NULL); 966 } 967 else { 968 mbstat.m_drops++; 969 } 970 return 1; 971 } -
cpukit/libnetworking/sys/mbuf.h
r1c841bd2 r11cdbeb 411 411 void m_copydata __P((struct mbuf *,int,int,caddr_t)); 412 412 void m_freem __P((struct mbuf *)); 413 void m_reclaim __P((void)); 413 414 414 415 #ifdef MBTYPES
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