1 0c98da8b 2005-07-13 devnull #include <u.h>
2 0c98da8b 2005-07-13 devnull #include <libc.h>
3 0c98da8b 2005-07-13 devnull #include <thread.h>
4 0c98da8b 2005-07-13 devnull #include <sunrpc.h>
5 0c98da8b 2005-07-13 devnull #include <nfs3.h>
6 0c98da8b 2005-07-13 devnull #include <diskfs.h>
7 0c98da8b 2005-07-13 devnull #include "ffs.h"
9 e060bc52 2005-08-11 devnull #define BADBNO ((u64int)~0ULL)
11 0c98da8b 2005-07-13 devnull #define checkcg 0
12 0c98da8b 2005-07-13 devnull #define debug 0
14 0c98da8b 2005-07-13 devnull static int checkfsblk(Fsblk*);
15 0c98da8b 2005-07-13 devnull static int checkcgblk(Cgblk*);
16 0c98da8b 2005-07-13 devnull static Block *ffsblockread(Fsys*, u64int);
17 0c98da8b 2005-07-13 devnull static int ffssync(Fsys*);
18 0c98da8b 2005-07-13 devnull static void ffsclose(Fsys*);
20 9f4a65a0 2005-07-28 devnull static u64int ffsxfileblock(Fsys *fs, Nfs3Handle *h, u64int offset);
21 0c98da8b 2005-07-13 devnull static Nfs3Status ffsroot(Fsys*, Nfs3Handle*);
22 0c98da8b 2005-07-13 devnull static Nfs3Status ffsgetattr(Fsys*, SunAuthUnix *au, Nfs3Handle*, Nfs3Attr*);
23 0c98da8b 2005-07-13 devnull static Nfs3Status ffslookup(Fsys*, SunAuthUnix *au, Nfs3Handle*, char*, Nfs3Handle*);
24 0c98da8b 2005-07-13 devnull static Nfs3Status ffsreadfile(Fsys*, SunAuthUnix *au, Nfs3Handle*, u32int, u64int, uchar**, u32int*, u1int*);
25 0c98da8b 2005-07-13 devnull static Nfs3Status ffsreadlink(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, char **link);
26 0c98da8b 2005-07-13 devnull static Nfs3Status ffsreaddir(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int, u64int, uchar**, u32int*, u1int*);
27 0c98da8b 2005-07-13 devnull static Nfs3Status ffsaccess(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int want, u32int *got, Nfs3Attr *attr);
30 0c98da8b 2005-07-13 devnull fsysopenffs(Disk *disk)
33 0c98da8b 2005-07-13 devnull Fsys *fsys;
35 0c98da8b 2005-07-13 devnull fsys = emalloc(sizeof(Fsys));
36 0c98da8b 2005-07-13 devnull fs = emalloc(sizeof(Ffs));
37 0c98da8b 2005-07-13 devnull fs->disk = disk;
38 0c98da8b 2005-07-13 devnull fsys->priv = fs;
39 0c98da8b 2005-07-13 devnull fsys->type = "ffs";
40 0c98da8b 2005-07-13 devnull fsys->_readblock = ffsblockread;
41 0c98da8b 2005-07-13 devnull fsys->_sync = ffssync;
42 0c98da8b 2005-07-13 devnull fsys->_root = ffsroot;
43 0c98da8b 2005-07-13 devnull fsys->_getattr = ffsgetattr;
44 0c98da8b 2005-07-13 devnull fsys->_access = ffsaccess;
45 0c98da8b 2005-07-13 devnull fsys->_lookup = ffslookup;
46 0c98da8b 2005-07-13 devnull fsys->_readfile = ffsreadfile;
47 0c98da8b 2005-07-13 devnull fsys->_readlink = ffsreadlink;
48 0c98da8b 2005-07-13 devnull fsys->_readdir = ffsreaddir;
49 9f4a65a0 2005-07-28 devnull fsys->fileblock = ffsxfileblock;
51 0c98da8b 2005-07-13 devnull if(ffssync(fsys) < 0)
52 0c98da8b 2005-07-13 devnull goto error;
54 0c98da8b 2005-07-13 devnull return fsys;
57 0c98da8b 2005-07-13 devnull ffsclose(fsys);
58 0c98da8b 2005-07-13 devnull return nil;
61 0c98da8b 2005-07-13 devnull static Cgblk*
62 e060bc52 2005-08-11 devnull ffscylgrp(Ffs *fs, u32int i, Block **pb)
64 0c98da8b 2005-07-13 devnull Block *b;
65 0c98da8b 2005-07-13 devnull Cgblk *cg;
67 0c98da8b 2005-07-13 devnull if(i >= fs->ncg)
68 0c98da8b 2005-07-13 devnull return nil;
70 0c98da8b 2005-07-13 devnull b = diskread(fs->disk, fs->blocksize, (u64int)fs->cg[i].cgblkno*fs->blocksize);
71 0c98da8b 2005-07-13 devnull if(b == nil)
72 0c98da8b 2005-07-13 devnull return nil;
73 0c98da8b 2005-07-13 devnull cg = (Cgblk*)b->data;
74 0c98da8b 2005-07-13 devnull if(checkcgblk(cg) < 0){
75 0c98da8b 2005-07-13 devnull fprint(2, "checkcgblk %d %lud: %r\n", i, (ulong)fs->cg[i].cgblkno);
76 0c98da8b 2005-07-13 devnull blockput(b);
77 0c98da8b 2005-07-13 devnull return nil;
80 0c98da8b 2005-07-13 devnull return cg;
83 0c98da8b 2005-07-13 devnull static int
84 0c98da8b 2005-07-13 devnull ffssync(Fsys *fsys)
87 e060bc52 2005-08-11 devnull int off[] = { SBOFF, SBOFF2, SBOFFPIGGY };
88 0c98da8b 2005-07-13 devnull Block *b, *cgb;
89 0c98da8b 2005-07-13 devnull Cgblk *cgblk;
90 0c98da8b 2005-07-13 devnull Cylgrp *cg;
91 0c98da8b 2005-07-13 devnull Disk *disk;
93 0c98da8b 2005-07-13 devnull Fsblk *fsblk;
95 0c98da8b 2005-07-13 devnull fs = fsys->priv;
96 0c98da8b 2005-07-13 devnull disk = fs->disk;
99 0c98da8b 2005-07-13 devnull * Read super block.
101 e060bc52 2005-08-11 devnull for(i=0; i<nelem(off); i++){
102 e060bc52 2005-08-11 devnull if((b = diskread(disk, SBSIZE, off[i])) == nil)
103 e060bc52 2005-08-11 devnull goto error;
104 e060bc52 2005-08-11 devnull fsblk = (Fsblk*)b->data;
105 e060bc52 2005-08-11 devnull fprint(2, "offset of magic: %d\n", offsetof(Fsblk, magic));
106 e060bc52 2005-08-11 devnull if((fs->ufs = checkfsblk(fsblk)) > 0)
107 e060bc52 2005-08-11 devnull goto okay;
108 e060bc52 2005-08-11 devnull blockput(b);
110 e060bc52 2005-08-11 devnull goto error;
113 0c98da8b 2005-07-13 devnull fs->blocksize = fsblk->blocksize;
114 0c98da8b 2005-07-13 devnull fs->nblock = (fsblk->nfrag+fsblk->fragsperblock-1) / fsblk->fragsperblock;
115 0c98da8b 2005-07-13 devnull fs->fragsize = fsblk->fragsize;
116 0c98da8b 2005-07-13 devnull fs->fragspergroup = fsblk->fragspergroup;
117 0c98da8b 2005-07-13 devnull fs->fragsperblock = fsblk->fragsperblock;
118 0c98da8b 2005-07-13 devnull fs->inosperblock = fsblk->inosperblock;
119 0c98da8b 2005-07-13 devnull fs->inospergroup = fsblk->inospergroup;
121 0c98da8b 2005-07-13 devnull fs->nfrag = fsblk->nfrag;
122 0c98da8b 2005-07-13 devnull fs->ndfrag = fsblk->ndfrag;
124 e060bc52 2005-08-11 devnull * used to use
125 e060bc52 2005-08-11 devnull * fs->blockspergroup = (u64int)fsblk->_cylspergroup *
126 e060bc52 2005-08-11 devnull * fsblk->secspercyl * BYTESPERSEC / fsblk->blocksize;
127 e060bc52 2005-08-11 devnull * for UFS1, but this should work for both UFS1 and UFS2
129 e060bc52 2005-08-11 devnull fs->blockspergroup = (u64int)fsblk->fragspergroup / fsblk->fragsperblock;
130 0c98da8b 2005-07-13 devnull fs->ncg = fsblk->ncg;
132 0c98da8b 2005-07-13 devnull fsys->blocksize = fs->blocksize;
133 0c98da8b 2005-07-13 devnull fsys->nblock = fs->nblock;
135 e060bc52 2005-08-11 devnull if(debug) fprint(2, "ffs %lld %d-byte blocks, %d cylinder groups\n",
136 0c98da8b 2005-07-13 devnull fs->nblock, fs->blocksize, fs->ncg);
137 e060bc52 2005-08-11 devnull if(debug) fprint(2, "\tinospergroup %d perblock %d blockspergroup %lld\n",
138 e060bc52 2005-08-11 devnull fs->inospergroup, fs->inosperblock, fs->blockspergroup);
140 0c98da8b 2005-07-13 devnull if(fs->cg == nil)
141 0c98da8b 2005-07-13 devnull fs->cg = emalloc(fs->ncg*sizeof(Cylgrp));
142 0c98da8b 2005-07-13 devnull for(i=0; i<fs->ncg; i++){
143 0c98da8b 2005-07-13 devnull cg = &fs->cg[i];
144 e060bc52 2005-08-11 devnull if(fs->ufs == 2)
145 e060bc52 2005-08-11 devnull cg->bno = (u64int)fs->blockspergroup*i;
147 e060bc52 2005-08-11 devnull cg->bno = fs->blockspergroup*i + fsblk->_cgoffset * (i & ~fsblk->_cgmask);
148 0c98da8b 2005-07-13 devnull cg->cgblkno = cg->bno + fsblk->cfragno/fs->fragsperblock;
149 0c98da8b 2005-07-13 devnull cg->ibno = cg->bno + fsblk->ifragno/fs->fragsperblock;
150 0c98da8b 2005-07-13 devnull cg->dbno = cg->bno + fsblk->dfragno/fs->fragsperblock;
152 0c98da8b 2005-07-13 devnull if(checkcg){
153 0c98da8b 2005-07-13 devnull if((cgb = diskread(disk, fs->blocksize, (u64int)cg->cgblkno*fs->blocksize)) == nil)
154 0c98da8b 2005-07-13 devnull goto error;
156 0c98da8b 2005-07-13 devnull cgblk = (Cgblk*)cgb->data;
157 0c98da8b 2005-07-13 devnull if(checkcgblk(cgblk) < 0){
158 0c98da8b 2005-07-13 devnull blockput(cgb);
159 0c98da8b 2005-07-13 devnull goto error;
161 0c98da8b 2005-07-13 devnull if(cgblk->nfrag % fs->fragsperblock && i != fs->ncg-1){
162 0c98da8b 2005-07-13 devnull werrstr("fractional number of blocks in non-last cylinder group %d", cgblk->nfrag);
163 0c98da8b 2005-07-13 devnull blockput(cgb);
164 0c98da8b 2005-07-13 devnull goto error;
166 0c98da8b 2005-07-13 devnull // cg->nfrag = cgblk->nfrag;
167 0c98da8b 2005-07-13 devnull // cg->nblock = (cgblk->nfrag+fs->fragsperblock-1) / fs->fragsperblock;
168 0c98da8b 2005-07-13 devnull // fprint(2, "cg #%d: cgblk %lud, %d blocks, %d inodes\n", cgblk->num, (ulong)cg->cgblkno, cg->nblock, cg->nino);
171 0c98da8b 2005-07-13 devnull blockput(b);
172 0c98da8b 2005-07-13 devnull return 0;
175 0c98da8b 2005-07-13 devnull blockput(b);
176 0c98da8b 2005-07-13 devnull return -1;
179 0c98da8b 2005-07-13 devnull static void
180 0c98da8b 2005-07-13 devnull ffsclose(Fsys *fsys)
182 0c98da8b 2005-07-13 devnull Ffs *fs;
184 0c98da8b 2005-07-13 devnull fs = fsys->priv;
185 0c98da8b 2005-07-13 devnull if(fs->cg)
186 0c98da8b 2005-07-13 devnull free(fs->cg);
187 0c98da8b 2005-07-13 devnull free(fs);
188 0c98da8b 2005-07-13 devnull free(fsys);
191 0c98da8b 2005-07-13 devnull static int
192 0c98da8b 2005-07-13 devnull checkfsblk(Fsblk *super)
194 e060bc52 2005-08-11 devnull fprint(2, "ffs magic 0x%ux\n", super->magic);
195 e060bc52 2005-08-11 devnull if(super->magic == FSMAGIC){
196 e060bc52 2005-08-11 devnull super->time = super->_time;
197 e060bc52 2005-08-11 devnull super->nfrag = super->_nfrag;
198 e060bc52 2005-08-11 devnull super->ndfrag = super->_ndfrag;
199 e060bc52 2005-08-11 devnull super->flags = super->_flags;
200 e060bc52 2005-08-11 devnull return 1;
202 e060bc52 2005-08-11 devnull if(super->magic == FSMAGIC2){
203 e060bc52 2005-08-11 devnull return 2;
206 e060bc52 2005-08-11 devnull werrstr("bad super block");
207 e060bc52 2005-08-11 devnull return -1;
210 0c98da8b 2005-07-13 devnull static int
211 0c98da8b 2005-07-13 devnull checkcgblk(Cgblk *cg)
213 0c98da8b 2005-07-13 devnull if(cg->magic != CGMAGIC){
214 0c98da8b 2005-07-13 devnull werrstr("bad cylinder group block");
215 0c98da8b 2005-07-13 devnull return -1;
217 0c98da8b 2005-07-13 devnull return 0;
221 0c98da8b 2005-07-13 devnull * Read block #bno from the disk, zeroing unused data.
222 0c98da8b 2005-07-13 devnull * If there is no data whatsoever, it's okay to return nil.
224 0c98da8b 2005-07-13 devnull int nskipx;
225 0c98da8b 2005-07-13 devnull static Block*
226 0c98da8b 2005-07-13 devnull ffsblockread(Fsys *fsys, u64int bno)
228 e060bc52 2005-08-11 devnull int i, o;
229 0c98da8b 2005-07-13 devnull u8int *fmap;
230 0c98da8b 2005-07-13 devnull int frag, fsize, avail;
231 0c98da8b 2005-07-13 devnull Block *b;
232 0c98da8b 2005-07-13 devnull Cgblk *cgblk;
233 0c98da8b 2005-07-13 devnull Ffs *fs;
235 0c98da8b 2005-07-13 devnull fs = fsys->priv;
236 0c98da8b 2005-07-13 devnull i = bno / fs->blockspergroup;
237 0c98da8b 2005-07-13 devnull o = bno % fs->blockspergroup;
238 0c98da8b 2005-07-13 devnull if(i >= fs->ncg)
239 0c98da8b 2005-07-13 devnull return nil;
241 0c98da8b 2005-07-13 devnull if((cgblk = ffscylgrp(fs, i, &b)) == nil)
242 0c98da8b 2005-07-13 devnull return nil;
244 0c98da8b 2005-07-13 devnull fmap = (u8int*)cgblk+cgblk->fmapoff;
245 0c98da8b 2005-07-13 devnull frag = fs->fragsperblock;
246 0c98da8b 2005-07-13 devnull switch(frag){
247 0c98da8b 2005-07-13 devnull default:
248 0c98da8b 2005-07-13 devnull sysfatal("bad frag");
250 0c98da8b 2005-07-13 devnull avail = fmap[o];
253 0c98da8b 2005-07-13 devnull avail = (fmap[o>>1] >> ((o&1)*4)) & 0xF;
256 0c98da8b 2005-07-13 devnull avail = (fmap[o>>2] >> ((o&3)*2)) & 0x3;
259 0c98da8b 2005-07-13 devnull avail = (fmap[o>>3] >> (o&7)) & 0x1;
262 0c98da8b 2005-07-13 devnull blockput(b);
264 0c98da8b 2005-07-13 devnull if(avail == ((1<<frag)-1))
266 0c98da8b 2005-07-13 devnull nskipx++;
267 0c98da8b 2005-07-13 devnull return nil;
269 0c98da8b 2005-07-13 devnull if((b = diskread(fs->disk, fs->blocksize, bno*fs->blocksize)) == nil){
270 0c98da8b 2005-07-13 devnull fprint(2, "diskread failed!!!\n");
271 0c98da8b 2005-07-13 devnull return nil;
274 0c98da8b 2005-07-13 devnull fsize = fs->fragsize;
275 0c98da8b 2005-07-13 devnull for(i=0; i<frag; i++)
276 0c98da8b 2005-07-13 devnull if(avail & (1<<i))
277 0c98da8b 2005-07-13 devnull memset(b->data + fsize*i, 0, fsize);
278 0c98da8b 2005-07-13 devnull return b;
281 0c98da8b 2005-07-13 devnull static Block*
282 e060bc52 2005-08-11 devnull ffsdatablock(Ffs *fs, u64int bno, int size)
284 0c98da8b 2005-07-13 devnull int fsize;
285 0c98da8b 2005-07-13 devnull u64int diskaddr;
286 0c98da8b 2005-07-13 devnull Block *b;
288 0c98da8b 2005-07-13 devnull if(bno == 0)
289 0c98da8b 2005-07-13 devnull return nil;
291 0c98da8b 2005-07-13 devnull fsize = size;
292 0c98da8b 2005-07-13 devnull if(fsize < fs->fragsize)
293 0c98da8b 2005-07-13 devnull fsize = fs->fragsize;
295 0c98da8b 2005-07-13 devnull if(bno >= fs->nfrag){
296 0c98da8b 2005-07-13 devnull fprint(2, "ffs: request for block %#lux; nfrag %#x\n", (ulong)bno, fs->nfrag);
297 0c98da8b 2005-07-13 devnull return nil;
299 0c98da8b 2005-07-13 devnull diskaddr = (u64int)bno*fs->fragsize;
300 0c98da8b 2005-07-13 devnull b = diskread(fs->disk, fsize, diskaddr);
301 0c98da8b 2005-07-13 devnull if(b == nil){
302 0c98da8b 2005-07-13 devnull fprint(2, "ffs: disk i/o at %#llux for %#ux: %r\n", diskaddr, fsize);
303 0c98da8b 2005-07-13 devnull return nil;
305 0c98da8b 2005-07-13 devnull if(b->len < fsize){
306 0c98da8b 2005-07-13 devnull fprint(2, "ffs: disk i/o at %#llux for %#ux got %#ux\n", diskaddr, fsize,
307 0c98da8b 2005-07-13 devnull b->len);
308 0c98da8b 2005-07-13 devnull blockput(b);
309 0c98da8b 2005-07-13 devnull return nil;
312 0c98da8b 2005-07-13 devnull return b;
315 e060bc52 2005-08-11 devnull static u64int
316 e060bc52 2005-08-11 devnull ifetch(Ffs *fs, u64int bno, u32int off)
318 9f4a65a0 2005-07-28 devnull Block *b;
320 e060bc52 2005-08-11 devnull if(bno == BADBNO)
321 e060bc52 2005-08-11 devnull return BADBNO;
322 9f4a65a0 2005-07-28 devnull b = ffsdatablock(fs, bno, fs->blocksize);
323 9f4a65a0 2005-07-28 devnull if(b == nil)
324 e060bc52 2005-08-11 devnull return BADBNO;
325 e060bc52 2005-08-11 devnull if(fs->ufs == 2)
326 e060bc52 2005-08-11 devnull bno = ((u64int*)b->data)[off];
328 e060bc52 2005-08-11 devnull bno = ((u32int*)b->data)[off];
329 9f4a65a0 2005-07-28 devnull blockput(b);
330 9f4a65a0 2005-07-28 devnull return bno;
333 e060bc52 2005-08-11 devnull static u64int
334 e060bc52 2005-08-11 devnull ffsfileblockno(Ffs *fs, Inode *ino, u64int bno)
336 9f4a65a0 2005-07-28 devnull int ppb;
338 0c98da8b 2005-07-13 devnull if(bno < NDADDR){
339 0c98da8b 2005-07-13 devnull if(debug) fprint(2, "ffsfileblock %lud: direct %#lux\n", (ulong)bno, (ulong)ino->db[bno]);
340 9f4a65a0 2005-07-28 devnull return ino->db[bno];
342 0c98da8b 2005-07-13 devnull bno -= NDADDR;
343 0c98da8b 2005-07-13 devnull ppb = fs->blocksize/4;
345 9f4a65a0 2005-07-28 devnull if(bno < ppb) /* single indirect */
346 9f4a65a0 2005-07-28 devnull return ifetch(fs, ino->ib[0], bno);
347 9f4a65a0 2005-07-28 devnull bno -= ppb;
349 9f4a65a0 2005-07-28 devnull if(bno < ppb*ppb)
350 9f4a65a0 2005-07-28 devnull return ifetch(fs, ifetch(fs, ino->ib[1], bno/ppb), bno%ppb);
351 9f4a65a0 2005-07-28 devnull bno -= ppb*ppb;
353 9f4a65a0 2005-07-28 devnull if(bno/ppb/ppb/ppb == 0) /* bno < ppb*ppb*ppb w/o overflow */
354 9f4a65a0 2005-07-28 devnull return ifetch(fs, ifetch(fs, ifetch(fs, ino->ib[2], bno/ppb/ppb), (bno/ppb)%ppb), bno%ppb);
356 e060bc52 2005-08-11 devnull fprint(2, "ffsfileblock %llud: way too big\n", bno+NDADDR+ppb+ppb*ppb);
357 e060bc52 2005-08-11 devnull return BADBNO;
360 9f4a65a0 2005-07-28 devnull static Block*
361 e060bc52 2005-08-11 devnull ffsfileblock(Ffs *fs, Inode *ino, u64int bno, int size)
363 e060bc52 2005-08-11 devnull u64int b;
365 9f4a65a0 2005-07-28 devnull b = ffsfileblockno(fs, ino, bno);
366 9f4a65a0 2005-07-28 devnull if(b == ~0)
367 9f4a65a0 2005-07-28 devnull return nil;
368 9f4a65a0 2005-07-28 devnull return ffsdatablock(fs, b, size);
372 0c98da8b 2005-07-13 devnull * NFS handles are 4-byte inode number.
374 0c98da8b 2005-07-13 devnull static void
375 0c98da8b 2005-07-13 devnull mkhandle(Nfs3Handle *h, u64int ino)
377 0c98da8b 2005-07-13 devnull h->h[0] = ino >> 24;
378 0c98da8b 2005-07-13 devnull h->h[1] = ino >> 16;
379 0c98da8b 2005-07-13 devnull h->h[2] = ino >> 8;
380 0c98da8b 2005-07-13 devnull h->h[3] = ino;
381 0c98da8b 2005-07-13 devnull h->len = 4;
384 0c98da8b 2005-07-13 devnull static u32int
385 0c98da8b 2005-07-13 devnull byte2u32(uchar *p)
387 0c98da8b 2005-07-13 devnull return (p[0]<<24) | (p[1]<<16) | (p[2]<<8) | p[3];
390 e060bc52 2005-08-11 devnull static u64int lastiaddr; /* debugging */
392 e060bc52 2005-08-11 devnull static void
393 e060bc52 2005-08-11 devnull inode1to2(Inode1 *i1, Inode *i2)
397 e060bc52 2005-08-11 devnull memset(i2, 0, sizeof *i2);
398 e060bc52 2005-08-11 devnull i2->mode = i1->mode;
399 e060bc52 2005-08-11 devnull i2->nlink = i1->nlink;
400 e060bc52 2005-08-11 devnull i2->size = i1->size;
401 e060bc52 2005-08-11 devnull i2->atime = i1->atime;
402 e060bc52 2005-08-11 devnull i2->atimensec = i1->atimensec;
403 e060bc52 2005-08-11 devnull i2->mtime = i1->mtime;
404 e060bc52 2005-08-11 devnull i2->mtimensec = i1->mtimensec;
405 e060bc52 2005-08-11 devnull i2->ctime = i1->ctime;
406 e060bc52 2005-08-11 devnull i2->ctimensec = i1->ctimensec;
407 e060bc52 2005-08-11 devnull for(i=0; i<NDADDR; i++)
408 e060bc52 2005-08-11 devnull i2->db[i] = i1->db[i];
409 e060bc52 2005-08-11 devnull for(i=0; i<NIADDR; i++)
410 e060bc52 2005-08-11 devnull i2->ib[i] = i1->ib[i];
411 e060bc52 2005-08-11 devnull i2->flags = i1->flags;
412 e060bc52 2005-08-11 devnull i2->nblock = i1->nblock;
413 e060bc52 2005-08-11 devnull i2->gen = i1->gen;
414 e060bc52 2005-08-11 devnull i2->uid = i1->uid;
415 e060bc52 2005-08-11 devnull i2->gid = i1->gid;
418 0c98da8b 2005-07-13 devnull static Nfs3Status
419 0c98da8b 2005-07-13 devnull handle2ino(Ffs *fs, Nfs3Handle *h, u32int *pinum, Inode *ino)
422 0c98da8b 2005-07-13 devnull u32int ioff;
423 0c98da8b 2005-07-13 devnull u32int inum;
424 e060bc52 2005-08-11 devnull u64int iaddr;
425 0c98da8b 2005-07-13 devnull Block *b;
426 0c98da8b 2005-07-13 devnull Cylgrp *cg;
427 e060bc52 2005-08-11 devnull Inode1 ino1;
429 0c98da8b 2005-07-13 devnull if(h->len != 4)
430 0c98da8b 2005-07-13 devnull return Nfs3ErrBadHandle;
431 0c98da8b 2005-07-13 devnull inum = byte2u32(h->h);
432 0c98da8b 2005-07-13 devnull if(pinum)
433 0c98da8b 2005-07-13 devnull *pinum = inum;
434 0c98da8b 2005-07-13 devnull if(debug) print("inum %d...", (int)inum);
436 0c98da8b 2005-07-13 devnull /* fetch inode from disk */
437 0c98da8b 2005-07-13 devnull i = inum / fs->inospergroup;
438 0c98da8b 2005-07-13 devnull ioff = inum % fs->inospergroup;
439 0c98da8b 2005-07-13 devnull if(debug)print("cg %d off %d...", i, (int)ioff);
440 0c98da8b 2005-07-13 devnull if(i >= fs->ncg)
441 0c98da8b 2005-07-13 devnull return Nfs3ErrBadHandle;
442 0c98da8b 2005-07-13 devnull cg = &fs->cg[i];
444 e060bc52 2005-08-11 devnull if(debug) print("cg->ibno %lld ufs %d...", cg->ibno, fs->ufs);
445 e060bc52 2005-08-11 devnull iaddr = (cg->ibno+ioff/fs->inosperblock)*(vlong)fs->blocksize;
446 e060bc52 2005-08-11 devnull ioff = ioff%fs->inosperblock;
447 e060bc52 2005-08-11 devnull if((b = diskread(fs->disk, fs->blocksize, iaddr)) == nil)
448 0c98da8b 2005-07-13 devnull return Nfs3ErrIo;
449 e060bc52 2005-08-11 devnull if(fs->ufs == 2){
450 e060bc52 2005-08-11 devnull *ino = ((Inode*)b->data)[ioff];
451 e060bc52 2005-08-11 devnull lastiaddr = iaddr+ioff*sizeof(Inode);
453 e060bc52 2005-08-11 devnull ino1 = ((Inode1*)b->data)[ioff];
454 e060bc52 2005-08-11 devnull inode1to2(&ino1, ino);
455 e060bc52 2005-08-11 devnull lastiaddr = iaddr+ioff*sizeof(Inode1);
457 0c98da8b 2005-07-13 devnull blockput(b);
458 0c98da8b 2005-07-13 devnull return Nfs3Ok;
461 0c98da8b 2005-07-13 devnull static Nfs3Status
462 0c98da8b 2005-07-13 devnull ffsroot(Fsys *fsys, Nfs3Handle *h)
464 0c98da8b 2005-07-13 devnull USED(fsys);
465 0c98da8b 2005-07-13 devnull mkhandle(h, 2);
466 0c98da8b 2005-07-13 devnull return Nfs3Ok;
469 0c98da8b 2005-07-13 devnull static Nfs3Status
470 0c98da8b 2005-07-13 devnull ino2attr(Ffs *fs, Inode *ino, u32int inum, Nfs3Attr *attr)
472 0c98da8b 2005-07-13 devnull u32int rdev;
474 0c98da8b 2005-07-13 devnull attr->type = -1;
475 0c98da8b 2005-07-13 devnull switch(ino->mode&IFMT){
476 0c98da8b 2005-07-13 devnull case IFIFO:
477 0c98da8b 2005-07-13 devnull attr->type = Nfs3FileFifo;
479 0c98da8b 2005-07-13 devnull case IFCHR:
480 0c98da8b 2005-07-13 devnull attr->type = Nfs3FileChar;
482 0c98da8b 2005-07-13 devnull case IFDIR:
483 0c98da8b 2005-07-13 devnull attr->type = Nfs3FileDir;
485 0c98da8b 2005-07-13 devnull case IFBLK:
486 0c98da8b 2005-07-13 devnull attr->type = Nfs3FileBlock;
488 0c98da8b 2005-07-13 devnull case IFREG:
489 0c98da8b 2005-07-13 devnull attr->type = Nfs3FileReg;
491 0c98da8b 2005-07-13 devnull case IFLNK:
492 0c98da8b 2005-07-13 devnull attr->type = Nfs3FileSymlink;
494 0c98da8b 2005-07-13 devnull case IFSOCK:
495 0c98da8b 2005-07-13 devnull attr->type = Nfs3FileSocket;
497 0c98da8b 2005-07-13 devnull case IFWHT:
498 0c98da8b 2005-07-13 devnull default:
499 0c98da8b 2005-07-13 devnull return Nfs3ErrBadHandle;
502 0c98da8b 2005-07-13 devnull attr->mode = ino->mode&07777;
503 0c98da8b 2005-07-13 devnull attr->nlink = ino->nlink;
504 0c98da8b 2005-07-13 devnull attr->uid = ino->uid;
505 0c98da8b 2005-07-13 devnull attr->gid = ino->gid;
506 0c98da8b 2005-07-13 devnull attr->size = ino->size;
507 0c98da8b 2005-07-13 devnull attr->used = ino->nblock*fs->blocksize;
508 0c98da8b 2005-07-13 devnull if(attr->type==Nfs3FileBlock || attr->type==Nfs3FileChar){
509 0c98da8b 2005-07-13 devnull rdev = ino->db[0];
510 0c98da8b 2005-07-13 devnull attr->major = (rdev>>8)&0xFF;
511 0c98da8b 2005-07-13 devnull attr->minor = rdev & 0xFFFF00FF;
513 0c98da8b 2005-07-13 devnull attr->major = 0;
514 0c98da8b 2005-07-13 devnull attr->minor = 0;
516 0c98da8b 2005-07-13 devnull attr->fsid = 0;
517 0c98da8b 2005-07-13 devnull attr->fileid = inum;
518 0c98da8b 2005-07-13 devnull attr->atime.sec = ino->atime;
519 0c98da8b 2005-07-13 devnull attr->atime.nsec = ino->atimensec;
520 0c98da8b 2005-07-13 devnull attr->mtime.sec = ino->mtime;
521 0c98da8b 2005-07-13 devnull attr->mtime.nsec = ino->mtimensec;
522 0c98da8b 2005-07-13 devnull attr->ctime.sec = ino->ctime;
523 0c98da8b 2005-07-13 devnull attr->ctime.nsec = ino->ctimensec;
524 0c98da8b 2005-07-13 devnull return Nfs3Ok;
527 0c98da8b 2005-07-13 devnull static int
528 0c98da8b 2005-07-13 devnull ingroup(SunAuthUnix *au, uint gid)
532 0c98da8b 2005-07-13 devnull for(i=0; i<au->ng; i++)
533 0c98da8b 2005-07-13 devnull if(au->g[i] == gid)
534 0c98da8b 2005-07-13 devnull return 1;
535 0c98da8b 2005-07-13 devnull return 0;
538 0c98da8b 2005-07-13 devnull static Nfs3Status
539 0c98da8b 2005-07-13 devnull inoperm(Inode *ino, SunAuthUnix *au, int need)
541 0c98da8b 2005-07-13 devnull int have;
543 9f4a65a0 2005-07-28 devnull if(au == nil)
544 9f4a65a0 2005-07-28 devnull return Nfs3Ok;
546 0c98da8b 2005-07-13 devnull have = ino->mode&0777;
547 0c98da8b 2005-07-13 devnull if(ino->uid == au->uid)
548 0c98da8b 2005-07-13 devnull have >>= 6;
549 0c98da8b 2005-07-13 devnull else if(ino->gid == au->gid || ingroup(au, ino->gid))
550 0c98da8b 2005-07-13 devnull have >>= 3;
552 0c98da8b 2005-07-13 devnull if((have&need) != need)
553 0c98da8b 2005-07-13 devnull return Nfs3ErrNotOwner; /* really EPERM */
554 0c98da8b 2005-07-13 devnull return Nfs3Ok;
557 0c98da8b 2005-07-13 devnull static Nfs3Status
558 0c98da8b 2005-07-13 devnull ffsgetattr(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, Nfs3Attr *attr)
560 0c98da8b 2005-07-13 devnull Inode ino;
561 0c98da8b 2005-07-13 devnull u32int inum;
562 0c98da8b 2005-07-13 devnull Ffs *fs;
563 0c98da8b 2005-07-13 devnull Nfs3Status ok;
565 0c98da8b 2005-07-13 devnull fs = fsys->priv;
566 0c98da8b 2005-07-13 devnull if((ok = handle2ino(fs, h, &inum, &ino)) != Nfs3Ok)
567 0c98da8b 2005-07-13 devnull return ok;
569 0c98da8b 2005-07-13 devnull USED(au); /* anyone can getattr */
571 0c98da8b 2005-07-13 devnull return ino2attr(fs, &ino, inum, attr);
574 0c98da8b 2005-07-13 devnull static Nfs3Status
575 0c98da8b 2005-07-13 devnull ffsaccess(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int want, u32int *got, Nfs3Attr *attr)
577 0c98da8b 2005-07-13 devnull int have;
578 0c98da8b 2005-07-13 devnull Inode ino;
579 0c98da8b 2005-07-13 devnull u32int inum;
580 0c98da8b 2005-07-13 devnull Ffs *fs;
581 0c98da8b 2005-07-13 devnull Nfs3Status ok;
583 0c98da8b 2005-07-13 devnull fs = fsys->priv;
584 0c98da8b 2005-07-13 devnull if((ok = handle2ino(fs, h, &inum, &ino)) != Nfs3Ok)
585 0c98da8b 2005-07-13 devnull return ok;
587 0c98da8b 2005-07-13 devnull have = ino.mode&0777;
588 0c98da8b 2005-07-13 devnull if(ino.uid == au->uid)
589 0c98da8b 2005-07-13 devnull have >>= 6;
590 0c98da8b 2005-07-13 devnull else if(ino.gid == au->gid || ingroup(au, ino.gid))
591 0c98da8b 2005-07-13 devnull have >>= 3;
593 0c98da8b 2005-07-13 devnull *got = 0;
594 0c98da8b 2005-07-13 devnull if((want&Nfs3AccessRead) && (have&AREAD))
595 0c98da8b 2005-07-13 devnull *got |= Nfs3AccessRead;
596 0c98da8b 2005-07-13 devnull if((want&Nfs3AccessLookup) && (ino.mode&IFMT)==IFDIR && (have&AEXEC))
597 0c98da8b 2005-07-13 devnull *got |= Nfs3AccessLookup;
598 0c98da8b 2005-07-13 devnull if((want&Nfs3AccessExecute) && (ino.mode&IFMT)!=IFDIR && (have&AEXEC))
599 0c98da8b 2005-07-13 devnull *got |= Nfs3AccessExecute;
601 0c98da8b 2005-07-13 devnull return ino2attr(fs, &ino, inum, attr);
604 0c98da8b 2005-07-13 devnull static Nfs3Status
605 0c98da8b 2005-07-13 devnull ffslookup(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, char *name, Nfs3Handle *nh)
607 0c98da8b 2005-07-13 devnull u32int nblock;
608 0c98da8b 2005-07-13 devnull u32int i;
609 0c98da8b 2005-07-13 devnull uchar *p, *ep;
610 0c98da8b 2005-07-13 devnull Dirent *de;
611 0c98da8b 2005-07-13 devnull Inode ino;
612 0c98da8b 2005-07-13 devnull Block *b;
613 0c98da8b 2005-07-13 devnull Ffs *fs;
614 0c98da8b 2005-07-13 devnull Nfs3Status ok;
615 0c98da8b 2005-07-13 devnull int len, want;
617 0c98da8b 2005-07-13 devnull fs = fsys->priv;
618 0c98da8b 2005-07-13 devnull if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok)
619 0c98da8b 2005-07-13 devnull return ok;
621 0c98da8b 2005-07-13 devnull if((ino.mode&IFMT) != IFDIR)
622 0c98da8b 2005-07-13 devnull return Nfs3ErrNotDir;
624 0c98da8b 2005-07-13 devnull if((ok = inoperm(&ino, au, AEXEC)) != Nfs3Ok)
625 0c98da8b 2005-07-13 devnull return ok;
627 0c98da8b 2005-07-13 devnull len = strlen(name);
628 0c98da8b 2005-07-13 devnull nblock = (ino.size+fs->blocksize-1) / fs->blocksize;
629 0c98da8b 2005-07-13 devnull for(i=0; i<nblock; i++){
630 0c98da8b 2005-07-13 devnull if(i==nblock-1)
631 0c98da8b 2005-07-13 devnull want = ino.size % fs->blocksize;
633 0c98da8b 2005-07-13 devnull want = fs->blocksize;
634 0c98da8b 2005-07-13 devnull b = ffsfileblock(fs, &ino, i, want);
635 0c98da8b 2005-07-13 devnull if(b == nil)
636 0c98da8b 2005-07-13 devnull continue;
637 0c98da8b 2005-07-13 devnull p = b->data;
638 0c98da8b 2005-07-13 devnull ep = p+b->len;
639 0c98da8b 2005-07-13 devnull while(p < ep){
640 0c98da8b 2005-07-13 devnull de = (Dirent*)p;
641 0c98da8b 2005-07-13 devnull if(de->reclen == 0){
642 0c98da8b 2005-07-13 devnull if(debug)
643 0c98da8b 2005-07-13 devnull fprint(2, "reclen 0 at offset %d of %d\n", (int)(p-b->data), b->len);
646 0c98da8b 2005-07-13 devnull p += de->reclen;
647 0c98da8b 2005-07-13 devnull if(p > ep){
648 0c98da8b 2005-07-13 devnull if(debug)
649 0c98da8b 2005-07-13 devnull fprint(2, "bad len %d at offset %d of %d\n", de->reclen, (int)(p-b->data), b->len);
652 0c98da8b 2005-07-13 devnull if(de->ino == 0)
653 0c98da8b 2005-07-13 devnull continue;
654 0c98da8b 2005-07-13 devnull if(4+2+2+de->namlen > de->reclen){
655 0c98da8b 2005-07-13 devnull if(debug)
656 0c98da8b 2005-07-13 devnull fprint(2, "bad namelen %d at offset %d of %d\n", de->namlen, (int)(p-b->data), b->len);
659 0c98da8b 2005-07-13 devnull if(de->namlen == len && memcmp(de->name, name, len) == 0){
660 0c98da8b 2005-07-13 devnull mkhandle(nh, de->ino);
661 0c98da8b 2005-07-13 devnull blockput(b);
662 0c98da8b 2005-07-13 devnull return Nfs3Ok;
665 0c98da8b 2005-07-13 devnull blockput(b);
667 0c98da8b 2005-07-13 devnull return Nfs3ErrNoEnt;
670 0c98da8b 2005-07-13 devnull static Nfs3Status
671 0c98da8b 2005-07-13 devnull ffsreaddir(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int count, u64int cookie, uchar **pdata, u32int *pcount, u1int *peof)
673 0c98da8b 2005-07-13 devnull u32int nblock;
674 0c98da8b 2005-07-13 devnull u32int i;
675 0c98da8b 2005-07-13 devnull int off, done;
676 0c98da8b 2005-07-13 devnull uchar *data, *dp, *dep, *p, *ep, *ndp;
677 0c98da8b 2005-07-13 devnull Dirent *de;
678 0c98da8b 2005-07-13 devnull Inode ino;
679 0c98da8b 2005-07-13 devnull Block *b;
680 0c98da8b 2005-07-13 devnull Ffs *fs;
681 0c98da8b 2005-07-13 devnull Nfs3Status ok;
682 0c98da8b 2005-07-13 devnull Nfs3Entry e;
683 0c98da8b 2005-07-13 devnull int want;
685 0c98da8b 2005-07-13 devnull fs = fsys->priv;
686 0c98da8b 2005-07-13 devnull if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok)
687 0c98da8b 2005-07-13 devnull return ok;
689 0c98da8b 2005-07-13 devnull if((ino.mode&IFMT) != IFDIR)
690 0c98da8b 2005-07-13 devnull return Nfs3ErrNotDir;
692 0c98da8b 2005-07-13 devnull if((ok = inoperm(&ino, au, AREAD)) != Nfs3Ok)
693 0c98da8b 2005-07-13 devnull return ok;
695 0c98da8b 2005-07-13 devnull if(cookie >= ino.size){
696 0c98da8b 2005-07-13 devnull *pcount = 0;
697 0c98da8b 2005-07-13 devnull *pdata = 0;
698 0c98da8b 2005-07-13 devnull return Nfs3Ok;
701 0c98da8b 2005-07-13 devnull dp = malloc(count);
702 0c98da8b 2005-07-13 devnull data = dp;
703 0c98da8b 2005-07-13 devnull if(dp == nil)
704 0c98da8b 2005-07-13 devnull return Nfs3ErrNoMem;
705 0c98da8b 2005-07-13 devnull dep = dp+count;
706 0c98da8b 2005-07-13 devnull *peof = 0;
707 0c98da8b 2005-07-13 devnull nblock = (ino.size+fs->blocksize-1) / fs->blocksize;
708 0c98da8b 2005-07-13 devnull i = cookie/fs->blocksize;
709 0c98da8b 2005-07-13 devnull off = cookie%fs->blocksize;
710 0c98da8b 2005-07-13 devnull done = 0;
711 0c98da8b 2005-07-13 devnull for(; i<nblock && !done; i++){
712 0c98da8b 2005-07-13 devnull if(i==nblock-1)
713 0c98da8b 2005-07-13 devnull want = ino.size % fs->blocksize;
715 0c98da8b 2005-07-13 devnull want = fs->blocksize;
716 0c98da8b 2005-07-13 devnull b = ffsfileblock(fs, &ino, i, want);
717 0c98da8b 2005-07-13 devnull if(b == nil)
718 0c98da8b 2005-07-13 devnull continue;
719 0c98da8b 2005-07-13 devnull p = b->data;
720 0c98da8b 2005-07-13 devnull ep = p+b->len;
721 0c98da8b 2005-07-13 devnull memset(&e, 0, sizeof e);
722 0c98da8b 2005-07-13 devnull while(p < ep){
723 0c98da8b 2005-07-13 devnull de = (Dirent*)p;
724 0c98da8b 2005-07-13 devnull if(de->reclen == 0){
725 0c98da8b 2005-07-13 devnull if(debug) fprint(2, "reclen 0 at offset %d of %d\n", (int)(p-b->data), b->len);
728 0c98da8b 2005-07-13 devnull p += de->reclen;
729 0c98da8b 2005-07-13 devnull if(p > ep){
730 0c98da8b 2005-07-13 devnull if(debug) fprint(2, "reclen %d at offset %d of %d\n", de->reclen, (int)(p-b->data), b->len);
733 0c98da8b 2005-07-13 devnull if(de->ino == 0){
734 0c98da8b 2005-07-13 devnull if(debug) fprint(2, "zero inode\n");
735 0c98da8b 2005-07-13 devnull continue;
737 0c98da8b 2005-07-13 devnull if(4+2+2+de->namlen > de->reclen){
738 0c98da8b 2005-07-13 devnull if(debug) fprint(2, "bad namlen %d reclen %d at offset %d of %d\n", de->namlen, de->reclen, (int)(p-b->data), b->len);
741 0c98da8b 2005-07-13 devnull if(de->name[de->namlen] != 0){
742 0c98da8b 2005-07-13 devnull if(debug) fprint(2, "bad name %d %.*s\n", de->namlen, de->namlen, de->name);
743 0c98da8b 2005-07-13 devnull continue;
745 0c98da8b 2005-07-13 devnull if(debug) print("%s/%d ", de->name, (int)de->ino);
746 0c98da8b 2005-07-13 devnull if((uchar*)de - b->data < off)
747 0c98da8b 2005-07-13 devnull continue;
748 0c98da8b 2005-07-13 devnull e.fileid = de->ino;
749 0c98da8b 2005-07-13 devnull e.name = de->name;
750 0c98da8b 2005-07-13 devnull e.cookie = (u64int)i*fs->blocksize + (p - b->data);
751 0c98da8b 2005-07-13 devnull if(nfs3entrypack(dp, dep, &ndp, &e) < 0){
752 0c98da8b 2005-07-13 devnull done = 1;
755 0c98da8b 2005-07-13 devnull dp = ndp;
757 0c98da8b 2005-07-13 devnull off = 0;
758 0c98da8b 2005-07-13 devnull blockput(b);
760 0c98da8b 2005-07-13 devnull if(i==nblock)
761 0c98da8b 2005-07-13 devnull *peof = 1;
763 0c98da8b 2005-07-13 devnull *pcount = dp - data;
764 0c98da8b 2005-07-13 devnull *pdata = data;
765 0c98da8b 2005-07-13 devnull return Nfs3Ok;
768 9f4a65a0 2005-07-28 devnull static u64int
769 9f4a65a0 2005-07-28 devnull ffsxfileblock(Fsys *fsys, Nfs3Handle *h, u64int offset)
771 e060bc52 2005-08-11 devnull u64int bno;
772 9f4a65a0 2005-07-28 devnull Inode ino;
773 9f4a65a0 2005-07-28 devnull Nfs3Status ok;
774 9f4a65a0 2005-07-28 devnull Ffs *fs;
776 9f4a65a0 2005-07-28 devnull fs = fsys->priv;
777 9f4a65a0 2005-07-28 devnull if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok){
778 9f4a65a0 2005-07-28 devnull nfs3errstr(ok);
779 9f4a65a0 2005-07-28 devnull return 0;
781 e060bc52 2005-08-11 devnull if(offset == 1) /* clumsy hack for debugging */
782 e060bc52 2005-08-11 devnull return lastiaddr;
783 9f4a65a0 2005-07-28 devnull if(offset >= ino.size){
784 9f4a65a0 2005-07-28 devnull werrstr("beyond end of file");
785 9f4a65a0 2005-07-28 devnull return 0;
787 9f4a65a0 2005-07-28 devnull bno = offset/fs->blocksize;
788 9f4a65a0 2005-07-28 devnull bno = ffsfileblockno(fs, &ino, bno);
789 9f4a65a0 2005-07-28 devnull if(bno == ~0)
790 9f4a65a0 2005-07-28 devnull return 0;
791 9f4a65a0 2005-07-28 devnull return bno*(u64int)fs->fragsize;
794 0c98da8b 2005-07-13 devnull static Nfs3Status
795 0c98da8b 2005-07-13 devnull ffsreadfile(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int count,
796 0c98da8b 2005-07-13 devnull u64int offset, uchar **pdata, u32int *pcount, u1int *peof)
798 0c98da8b 2005-07-13 devnull uchar *data;
799 0c98da8b 2005-07-13 devnull Block *b;
800 0c98da8b 2005-07-13 devnull Ffs *fs;
801 0c98da8b 2005-07-13 devnull int off, want, fragcount;
802 0c98da8b 2005-07-13 devnull Inode ino;
803 0c98da8b 2005-07-13 devnull Nfs3Status ok;
805 0c98da8b 2005-07-13 devnull fs = fsys->priv;
806 0c98da8b 2005-07-13 devnull if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok)
807 0c98da8b 2005-07-13 devnull return ok;
809 0c98da8b 2005-07-13 devnull if((ok = inoperm(&ino, au, AREAD)) != Nfs3Ok)
810 0c98da8b 2005-07-13 devnull return ok;
812 0c98da8b 2005-07-13 devnull if(offset >= ino.size){
813 0c98da8b 2005-07-13 devnull *pdata = 0;
814 0c98da8b 2005-07-13 devnull *pcount = 0;
815 0c98da8b 2005-07-13 devnull *peof = 1;
816 0c98da8b 2005-07-13 devnull return Nfs3Ok;
818 0c98da8b 2005-07-13 devnull if(offset+count > ino.size)
819 0c98da8b 2005-07-13 devnull count = ino.size-offset;
820 0c98da8b 2005-07-13 devnull if(offset/fs->blocksize != (offset+count-1)/fs->blocksize)
821 0c98da8b 2005-07-13 devnull count = fs->blocksize - offset%fs->blocksize;
823 0c98da8b 2005-07-13 devnull data = malloc(count);
824 0c98da8b 2005-07-13 devnull if(data == nil)
825 0c98da8b 2005-07-13 devnull return Nfs3ErrNoMem;
827 0c98da8b 2005-07-13 devnull want = offset%fs->blocksize+count;
828 0c98da8b 2005-07-13 devnull if(want%fs->fragsize)
829 0c98da8b 2005-07-13 devnull want += fs->fragsize - want%fs->fragsize;
831 0c98da8b 2005-07-13 devnull b = ffsfileblock(fs, &ino, offset/fs->blocksize, want);
832 0c98da8b 2005-07-13 devnull if(b == nil){
833 0c98da8b 2005-07-13 devnull /* BUG: distinguish sparse file from I/O error */
834 0c98da8b 2005-07-13 devnull memset(data, 0, count);
836 0c98da8b 2005-07-13 devnull off = offset%fs->blocksize;
837 0c98da8b 2005-07-13 devnull fragcount = count; /* need signed variable */
838 0c98da8b 2005-07-13 devnull if(off+fragcount > b->len){
839 0c98da8b 2005-07-13 devnull fragcount = b->len - off;
840 0c98da8b 2005-07-13 devnull if(fragcount < 0)
841 0c98da8b 2005-07-13 devnull fragcount = 0;
843 0c98da8b 2005-07-13 devnull if(fragcount > 0)
844 0c98da8b 2005-07-13 devnull memmove(data, b->data+off, fragcount);
845 0c98da8b 2005-07-13 devnull count = fragcount;
846 0c98da8b 2005-07-13 devnull blockput(b);
848 0c98da8b 2005-07-13 devnull *peof = (offset+count == ino.size);
849 0c98da8b 2005-07-13 devnull *pcount = count;
850 0c98da8b 2005-07-13 devnull *pdata = data;
851 0c98da8b 2005-07-13 devnull return Nfs3Ok;
854 0c98da8b 2005-07-13 devnull static Nfs3Status
855 0c98da8b 2005-07-13 devnull ffsreadlink(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, char **link)
857 0c98da8b 2005-07-13 devnull Ffs *fs;
858 0c98da8b 2005-07-13 devnull Nfs3Status ok;
859 0c98da8b 2005-07-13 devnull int len;
860 0c98da8b 2005-07-13 devnull Inode ino;
861 0c98da8b 2005-07-13 devnull Block *b;
863 0c98da8b 2005-07-13 devnull fs = fsys->priv;
864 0c98da8b 2005-07-13 devnull if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok)
865 0c98da8b 2005-07-13 devnull return ok;
866 0c98da8b 2005-07-13 devnull if((ok = inoperm(&ino, au, AREAD)) != Nfs3Ok)
867 0c98da8b 2005-07-13 devnull return ok;
869 0c98da8b 2005-07-13 devnull if(ino.size > 1024)
870 0c98da8b 2005-07-13 devnull return Nfs3ErrIo;
871 0c98da8b 2005-07-13 devnull len = ino.size;
873 0c98da8b 2005-07-13 devnull if(ino.nblock != 0){
874 e060bc52 2005-08-11 devnull /* assumes symlink fits in one block */
875 0c98da8b 2005-07-13 devnull b = ffsfileblock(fs, &ino, 0, len);
876 0c98da8b 2005-07-13 devnull if(b == nil)
877 0c98da8b 2005-07-13 devnull return Nfs3ErrIo;
878 0c98da8b 2005-07-13 devnull if(memchr(b->data, 0, len) != nil){
879 0c98da8b 2005-07-13 devnull blockput(b);
880 0c98da8b 2005-07-13 devnull return Nfs3ErrIo;
882 0c98da8b 2005-07-13 devnull *link = malloc(len+1);
883 0c98da8b 2005-07-13 devnull if(*link == 0){
884 0c98da8b 2005-07-13 devnull blockput(b);
885 0c98da8b 2005-07-13 devnull return Nfs3ErrNoMem;
887 0c98da8b 2005-07-13 devnull memmove(*link, b->data, len);
888 0c98da8b 2005-07-13 devnull (*link)[len] = 0;
889 0c98da8b 2005-07-13 devnull blockput(b);
890 0c98da8b 2005-07-13 devnull return Nfs3Ok;
893 0c98da8b 2005-07-13 devnull if(len > sizeof ino.db + sizeof ino.ib)
894 0c98da8b 2005-07-13 devnull return Nfs3ErrIo;
896 0c98da8b 2005-07-13 devnull *link = malloc(len+1);
897 0c98da8b 2005-07-13 devnull if(*link == 0)
898 0c98da8b 2005-07-13 devnull return Nfs3ErrNoMem;
899 0c98da8b 2005-07-13 devnull memmove(*link, ino.db, ino.size);
900 0c98da8b 2005-07-13 devnull (*link)[len] = 0;
901 0c98da8b 2005-07-13 devnull return Nfs3Ok;