1 0faf0f0b 2005-02-13 devnull #include <u.h>
2 0faf0f0b 2005-02-13 devnull #include <libc.h>
3 0faf0f0b 2005-02-13 devnull #include <venti.h>
5 5ddc97fc 2005-02-14 devnull int ventilogging;
6 0faf0f0b 2005-02-13 devnull #define log not_the_log_library_call
8 5ddc97fc 2005-02-14 devnull static char Eremoved[] = "[removed]";
11 0faf0f0b 2005-02-13 devnull { /* defaults */
12 0faf0f0b 2005-02-13 devnull LogChunkSize = 8192,
13 cbeb0b26 2006-04-01 devnull LogSize = 65536
16 0faf0f0b 2005-02-13 devnull static struct {
17 0faf0f0b 2005-02-13 devnull QLock lk;
18 0faf0f0b 2005-02-13 devnull VtLog *hash[1024];
21 0faf0f0b 2005-02-13 devnull static uint
22 0faf0f0b 2005-02-13 devnull hash(char *s)
25 0faf0f0b 2005-02-13 devnull uchar *p;
28 0faf0f0b 2005-02-13 devnull for(p=(uchar*)s; *p; p++)
29 0faf0f0b 2005-02-13 devnull h = h*37 + *p;
30 0faf0f0b 2005-02-13 devnull return h;
34 52006c82 2005-05-12 devnull vtlognames(int *pn)
36 52006c82 2005-05-12 devnull int i, nname, size;
37 52006c82 2005-05-12 devnull VtLog *l;
38 52006c82 2005-05-12 devnull char **s, *a, *e;
40 52006c82 2005-05-12 devnull qlock(&vl.lk);
41 52006c82 2005-05-12 devnull size = 0;
42 52006c82 2005-05-12 devnull nname = 0;
43 52006c82 2005-05-12 devnull for(i=0; i<nelem(vl.hash); i++)
44 52006c82 2005-05-12 devnull for(l=vl.hash[i]; l; l=l->next){
46 52006c82 2005-05-12 devnull size += strlen(l->name)+1;
49 52006c82 2005-05-12 devnull s = vtmalloc(nname*sizeof(char*)+size);
50 52006c82 2005-05-12 devnull a = (char*)(s+nname);
51 52006c82 2005-05-12 devnull e = (char*)s+nname*sizeof(char*)+size;
53 52006c82 2005-05-12 devnull nname = 0;
54 52006c82 2005-05-12 devnull for(i=0; i<nelem(vl.hash); i++)
55 52006c82 2005-05-12 devnull for(l=vl.hash[i]; l; l=l->next){
56 52006c82 2005-05-12 devnull strcpy(a, l->name);
57 52006c82 2005-05-12 devnull s[nname++] = a;
58 52006c82 2005-05-12 devnull a += strlen(a)+1;
60 52006c82 2005-05-12 devnull *pn = nname;
61 52006c82 2005-05-12 devnull assert(a == e);
62 52006c82 2005-05-12 devnull qunlock(&vl.lk);
64 52006c82 2005-05-12 devnull return s;
68 0faf0f0b 2005-02-13 devnull vtlogopen(char *name, uint size)
71 0faf0f0b 2005-02-13 devnull int i, nc;
73 0faf0f0b 2005-02-13 devnull VtLog *l, *last;
75 5ddc97fc 2005-02-14 devnull if(!ventilogging)
76 5ddc97fc 2005-02-14 devnull return nil;
78 0faf0f0b 2005-02-13 devnull h = hash(name)%nelem(vl.hash);
79 0faf0f0b 2005-02-13 devnull qlock(&vl.lk);
80 0faf0f0b 2005-02-13 devnull last = nil;
81 0faf0f0b 2005-02-13 devnull for(l=vl.hash[h]; l; last=l, l=l->next)
82 0faf0f0b 2005-02-13 devnull if(strcmp(l->name, name) == 0){
83 0faf0f0b 2005-02-13 devnull if(last){ /* move to front */
84 0faf0f0b 2005-02-13 devnull last->next = l->next;
85 0faf0f0b 2005-02-13 devnull l->next = vl.hash[h];
86 0faf0f0b 2005-02-13 devnull vl.hash[h] = l;
88 0faf0f0b 2005-02-13 devnull l->ref++;
89 0faf0f0b 2005-02-13 devnull qunlock(&vl.lk);
90 0faf0f0b 2005-02-13 devnull return l;
93 0faf0f0b 2005-02-13 devnull if(size == 0){
94 0faf0f0b 2005-02-13 devnull qunlock(&vl.lk);
95 0faf0f0b 2005-02-13 devnull return nil;
98 0faf0f0b 2005-02-13 devnull /* allocate */
99 0faf0f0b 2005-02-13 devnull nc = (size+LogChunkSize-1)/LogChunkSize;
100 0faf0f0b 2005-02-13 devnull l = vtmalloc(sizeof *l + nc*(sizeof(*l->chunk)+LogChunkSize) + strlen(name)+1);
101 0faf0f0b 2005-02-13 devnull memset(l, 0, sizeof *l);
102 0faf0f0b 2005-02-13 devnull l->chunk = (VtLogChunk*)(l+1);
103 0faf0f0b 2005-02-13 devnull l->nchunk = nc;
104 0faf0f0b 2005-02-13 devnull l->w = l->chunk;
105 0faf0f0b 2005-02-13 devnull p = (char*)(l->chunk+nc);
106 0faf0f0b 2005-02-13 devnull for(i=0; i<nc; i++){
107 0faf0f0b 2005-02-13 devnull l->chunk[i].p = p;
108 5ddc97fc 2005-02-14 devnull l->chunk[i].wp = p;
109 0faf0f0b 2005-02-13 devnull p += LogChunkSize;
110 0faf0f0b 2005-02-13 devnull l->chunk[i].ep = p;
112 0faf0f0b 2005-02-13 devnull strcpy(p, name);
113 0faf0f0b 2005-02-13 devnull l->name = p;
115 0faf0f0b 2005-02-13 devnull /* insert */
116 0faf0f0b 2005-02-13 devnull l->next = vl.hash[h];
117 0faf0f0b 2005-02-13 devnull vl.hash[h] = l;
118 5ddc97fc 2005-02-14 devnull l->ref++;
120 0faf0f0b 2005-02-13 devnull l->ref++;
121 0faf0f0b 2005-02-13 devnull qunlock(&vl.lk);
122 0faf0f0b 2005-02-13 devnull return l;
126 0faf0f0b 2005-02-13 devnull vtlogclose(VtLog *l)
128 0faf0f0b 2005-02-13 devnull if(l == nil)
131 0faf0f0b 2005-02-13 devnull qlock(&vl.lk);
132 5ddc97fc 2005-02-14 devnull if(--l->ref == 0){
133 5ddc97fc 2005-02-14 devnull /* must not be in hash table */
134 5ddc97fc 2005-02-14 devnull assert(l->name == Eremoved);
135 0faf0f0b 2005-02-13 devnull free(l);
137 0faf0f0b 2005-02-13 devnull assert(l->ref > 0);
138 0faf0f0b 2005-02-13 devnull qunlock(&vl.lk);
142 0faf0f0b 2005-02-13 devnull vtlogremove(char *name)
145 0faf0f0b 2005-02-13 devnull VtLog *last, *l;
147 0faf0f0b 2005-02-13 devnull h = hash(name)%nelem(vl.hash);
148 0faf0f0b 2005-02-13 devnull qlock(&vl.lk);
149 0faf0f0b 2005-02-13 devnull last = nil;
150 0faf0f0b 2005-02-13 devnull for(l=vl.hash[h]; l; last=l, l=l->next)
151 0faf0f0b 2005-02-13 devnull if(strcmp(l->name, name) == 0){
152 0faf0f0b 2005-02-13 devnull if(last)
153 0faf0f0b 2005-02-13 devnull last->next = l->next;
155 0faf0f0b 2005-02-13 devnull vl.hash[h] = l->next;
156 5ddc97fc 2005-02-14 devnull l->name = Eremoved;
157 5ddc97fc 2005-02-14 devnull l->next = nil;
158 0faf0f0b 2005-02-13 devnull qunlock(&vl.lk);
159 0faf0f0b 2005-02-13 devnull vtlogclose(l);
162 0faf0f0b 2005-02-13 devnull qunlock(&vl.lk);
165 5ddc97fc 2005-02-14 devnull static int
166 5ddc97fc 2005-02-14 devnull timefmt(Fmt *fmt)
168 5ddc97fc 2005-02-14 devnull static uvlong t0;
169 5ddc97fc 2005-02-14 devnull uvlong t;
171 5ddc97fc 2005-02-14 devnull if(t0 == 0)
172 5ddc97fc 2005-02-14 devnull t0 = nsec();
173 5ddc97fc 2005-02-14 devnull t = nsec()-t0;
174 5ddc97fc 2005-02-14 devnull return fmtprint(fmt, "T+%d.%04d", (uint)(t/1000000000), (uint)(t%1000000000)/100000);
178 0faf0f0b 2005-02-13 devnull vtlogvprint(VtLog *l, char *fmt, va_list arg)
181 0faf0f0b 2005-02-13 devnull char *p;
182 0faf0f0b 2005-02-13 devnull VtLogChunk *c;
183 5ddc97fc 2005-02-14 devnull static int first = 1;
185 0faf0f0b 2005-02-13 devnull if(l == nil)
188 5ddc97fc 2005-02-14 devnull if(first){
189 5ddc97fc 2005-02-14 devnull fmtinstall('T', timefmt);
190 5ddc97fc 2005-02-14 devnull first = 0;
194 0faf0f0b 2005-02-13 devnull qlock(&l->lk);
195 0faf0f0b 2005-02-13 devnull c = l->w;
196 0faf0f0b 2005-02-13 devnull n = c->ep - c->wp;
197 0faf0f0b 2005-02-13 devnull if(n < 512){
199 0faf0f0b 2005-02-13 devnull if(c == l->chunk+l->nchunk)
200 0faf0f0b 2005-02-13 devnull c = l->chunk;
201 0faf0f0b 2005-02-13 devnull c->wp = c->p;
202 0faf0f0b 2005-02-13 devnull l->w = c;
204 0faf0f0b 2005-02-13 devnull p = vseprint(c->wp, c->ep, fmt, arg);
206 0faf0f0b 2005-02-13 devnull c->wp = p;
207 0faf0f0b 2005-02-13 devnull qunlock(&l->lk);
211 0faf0f0b 2005-02-13 devnull vtlogprint(VtLog *l, char *fmt, ...)
213 0faf0f0b 2005-02-13 devnull va_list arg;
215 0faf0f0b 2005-02-13 devnull if(l == nil)
218 0faf0f0b 2005-02-13 devnull va_start(arg, fmt);
219 0faf0f0b 2005-02-13 devnull vtlogvprint(l, fmt, arg);
220 0faf0f0b 2005-02-13 devnull va_end(arg);
224 0faf0f0b 2005-02-13 devnull vtlog(char *name, char *fmt, ...)
226 0faf0f0b 2005-02-13 devnull VtLog *l;
227 0faf0f0b 2005-02-13 devnull va_list arg;
229 0faf0f0b 2005-02-13 devnull l = vtlogopen(name, LogSize);
230 5ddc97fc 2005-02-14 devnull if(l == nil)
232 0faf0f0b 2005-02-13 devnull va_start(arg, fmt);
233 0faf0f0b 2005-02-13 devnull vtlogvprint(l, fmt, arg);
234 0faf0f0b 2005-02-13 devnull va_end(arg);
235 0faf0f0b 2005-02-13 devnull vtlogclose(l);
239 0faf0f0b 2005-02-13 devnull vtlogdump(int fd, VtLog *l)
242 0faf0f0b 2005-02-13 devnull VtLogChunk *c;
244 0faf0f0b 2005-02-13 devnull if(l == nil)
247 0faf0f0b 2005-02-13 devnull c = l->w;
248 0faf0f0b 2005-02-13 devnull for(i=0; i<l->nchunk; i++){
249 0faf0f0b 2005-02-13 devnull if(++c == l->chunk+l->nchunk)
250 0faf0f0b 2005-02-13 devnull c = l->chunk;
251 0faf0f0b 2005-02-13 devnull write(fd, c->p, c->wp-c->p);