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 "ext2.h"
9 e77222a4 2006-05-04 devnull #define debug 0
11 0c98da8b 2005-07-13 devnull static int ext2sync(Fsys*);
12 0c98da8b 2005-07-13 devnull static void ext2close(Fsys*);
13 0c98da8b 2005-07-13 devnull static Block* ext2blockread(Fsys*, u64int);
15 0c98da8b 2005-07-13 devnull static Nfs3Status ext2root(Fsys*, Nfs3Handle*);
16 0c98da8b 2005-07-13 devnull static Nfs3Status ext2getattr(Fsys*, SunAuthUnix *au, Nfs3Handle*, Nfs3Attr*);
17 0c98da8b 2005-07-13 devnull static Nfs3Status ext2lookup(Fsys*, SunAuthUnix *au, Nfs3Handle*, char*, Nfs3Handle*);
18 0c98da8b 2005-07-13 devnull static Nfs3Status ext2readfile(Fsys*, SunAuthUnix *au, Nfs3Handle*, u32int, u64int, uchar**, u32int*, u1int*);
19 0c98da8b 2005-07-13 devnull static Nfs3Status ext2readlink(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, char **link);
20 0c98da8b 2005-07-13 devnull static Nfs3Status ext2readdir(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int, u64int, uchar**, u32int*, u1int*);
21 0c98da8b 2005-07-13 devnull static Nfs3Status ext2access(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int want, u32int *got, Nfs3Attr *attr);
24 0c98da8b 2005-07-13 devnull fsysopenext2(Disk *disk)
26 0c98da8b 2005-07-13 devnull Ext2 *fs;
27 0c98da8b 2005-07-13 devnull Fsys *fsys;
29 0c98da8b 2005-07-13 devnull fsys = emalloc(sizeof(Fsys));
30 0c98da8b 2005-07-13 devnull fs = emalloc(sizeof(Ext2));
31 0c98da8b 2005-07-13 devnull fs->disk = disk;
32 0c98da8b 2005-07-13 devnull fsys->priv = fs;
33 0c98da8b 2005-07-13 devnull fs->fsys = fsys;
34 0c98da8b 2005-07-13 devnull fsys->type = "ext2";
35 0c98da8b 2005-07-13 devnull fsys->_readblock = ext2blockread;
36 0c98da8b 2005-07-13 devnull fsys->_sync = ext2sync;
37 0c98da8b 2005-07-13 devnull fsys->_root = ext2root;
38 0c98da8b 2005-07-13 devnull fsys->_getattr = ext2getattr;
39 0c98da8b 2005-07-13 devnull fsys->_access = ext2access;
40 0c98da8b 2005-07-13 devnull fsys->_lookup = ext2lookup;
41 0c98da8b 2005-07-13 devnull fsys->_readfile = ext2readfile;
42 0c98da8b 2005-07-13 devnull fsys->_readlink = ext2readlink;
43 0c98da8b 2005-07-13 devnull fsys->_readdir = ext2readdir;
45 0c98da8b 2005-07-13 devnull if(ext2sync(fsys) < 0)
46 0c98da8b 2005-07-13 devnull goto error;
48 0c98da8b 2005-07-13 devnull return fsys;
51 0c98da8b 2005-07-13 devnull ext2close(fsys);
52 0c98da8b 2005-07-13 devnull return nil;
55 0c98da8b 2005-07-13 devnull static void
56 0c98da8b 2005-07-13 devnull ext2close(Fsys *fsys)
58 0c98da8b 2005-07-13 devnull Ext2 *fs;
60 0c98da8b 2005-07-13 devnull fs = fsys->priv;
61 0c98da8b 2005-07-13 devnull free(fs);
62 0c98da8b 2005-07-13 devnull free(fsys);
65 0c98da8b 2005-07-13 devnull static Group*
66 0c98da8b 2005-07-13 devnull ext2group(Ext2 *fs, u32int i, Block **pb)
68 0c98da8b 2005-07-13 devnull Block *b;
69 0c98da8b 2005-07-13 devnull u64int addr;
70 0c98da8b 2005-07-13 devnull Group *g;
72 0c98da8b 2005-07-13 devnull if(i >= fs->ngroup)
73 0c98da8b 2005-07-13 devnull return nil;
75 0c98da8b 2005-07-13 devnull addr = fs->groupaddr + i/fs->descperblock;
76 0c98da8b 2005-07-13 devnull b = diskread(fs->disk, fs->blocksize, addr*fs->blocksize);
77 0c98da8b 2005-07-13 devnull if(b == nil)
78 0c98da8b 2005-07-13 devnull return nil;
79 0c98da8b 2005-07-13 devnull g = (Group*)(b->data+i%fs->descperblock*GroupSize);
81 0c98da8b 2005-07-13 devnull return g;
84 0c98da8b 2005-07-13 devnull static Block*
85 0c98da8b 2005-07-13 devnull ext2blockread(Fsys *fsys, u64int vbno)
87 0c98da8b 2005-07-13 devnull Block *bitb;
88 0c98da8b 2005-07-13 devnull Group *g;
89 0c98da8b 2005-07-13 devnull Block *gb;
90 0c98da8b 2005-07-13 devnull uchar *bits;
91 0c98da8b 2005-07-13 devnull u32int bno, boff;
92 0c98da8b 2005-07-13 devnull Ext2 *fs;
94 0c98da8b 2005-07-13 devnull fs = fsys->priv;
95 0c98da8b 2005-07-13 devnull if(vbno >= fs->nblock)
96 0c98da8b 2005-07-13 devnull return nil;
97 0c98da8b 2005-07-13 devnull bno = vbno;
98 0c98da8b 2005-07-13 devnull if(bno != vbno)
99 0c98da8b 2005-07-13 devnull return nil;
102 0c98da8b 2005-07-13 devnull if(bno < fs->firstblock)
103 0c98da8b 2005-07-13 devnull return diskread(fs->disk, fs->blocksize, (u64int)bno*fs->blocksize);
105 0c98da8b 2005-07-13 devnull if(bno < fs->firstblock)
106 0c98da8b 2005-07-13 devnull return nil;
108 0c98da8b 2005-07-13 devnull bno -= fs->firstblock;
109 0c98da8b 2005-07-13 devnull if((g = ext2group(fs, bno/fs->blockspergroup, &gb)) == nil){
110 0c98da8b 2005-07-13 devnull if(debug)
111 0c98da8b 2005-07-13 devnull fprint(2, "loading group: %r...");
112 0c98da8b 2005-07-13 devnull return nil;
115 e77222a4 2006-05-04 devnull if(debug)
116 e77222a4 2006-05-04 devnull fprint(2, "group %d bitblock=%d...", bno/fs->blockspergroup, g->bitblock);
119 0c98da8b 2005-07-13 devnull if((bitb = diskread(fs->disk, fs->blocksize, (u64int)g->bitblock*fs->blocksize)) == nil){
120 0c98da8b 2005-07-13 devnull if(debug)
121 0c98da8b 2005-07-13 devnull fprint(2, "loading bitblock: %r...");
122 0c98da8b 2005-07-13 devnull blockput(gb);
123 0c98da8b 2005-07-13 devnull return nil;
125 0c98da8b 2005-07-13 devnull bits = bitb->data;
126 0c98da8b 2005-07-13 devnull boff = bno%fs->blockspergroup;
127 0c98da8b 2005-07-13 devnull if((bits[boff>>3] & (1<<(boff&7))) == 0){
128 0c98da8b 2005-07-13 devnull if(debug)
129 0c98da8b 2005-07-13 devnull fprint(2, "block %d not allocated...", bno);
130 0c98da8b 2005-07-13 devnull blockput(bitb);
131 0c98da8b 2005-07-13 devnull blockput(gb);
132 0c98da8b 2005-07-13 devnull return nil;
135 0c98da8b 2005-07-13 devnull bno += fs->firstblock;
136 0c98da8b 2005-07-13 devnull return diskread(fs->disk, fs->blocksize, (u64int)bno*fs->blocksize);
139 0c98da8b 2005-07-13 devnull static Block*
140 0c98da8b 2005-07-13 devnull ext2datablock(Ext2 *fs, u32int bno, int size)
142 3330e5bf 2005-10-29 devnull USED(size);
143 e77222a4 2006-05-04 devnull return ext2blockread(fs->fsys, bno);
146 0c98da8b 2005-07-13 devnull static Block*
147 0c98da8b 2005-07-13 devnull ext2fileblock(Ext2 *fs, Inode *ino, u32int bno, int size)
149 0c98da8b 2005-07-13 devnull int ppb;
150 0c98da8b 2005-07-13 devnull Block *b;
151 0c98da8b 2005-07-13 devnull u32int *a;
152 0c98da8b 2005-07-13 devnull u32int obno;
154 0c98da8b 2005-07-13 devnull obno = bno;
155 0c98da8b 2005-07-13 devnull if(bno < NDIRBLOCKS){
156 0c98da8b 2005-07-13 devnull if(debug)
157 0c98da8b 2005-07-13 devnull fprint(2, "fileblock %d -> %d...",
158 0c98da8b 2005-07-13 devnull bno, ino->block[bno]);
159 0c98da8b 2005-07-13 devnull return ext2datablock(fs, ino->block[bno], size);
161 0c98da8b 2005-07-13 devnull bno -= NDIRBLOCKS;
162 0c98da8b 2005-07-13 devnull ppb = fs->blocksize/4;
164 0c98da8b 2005-07-13 devnull /* one indirect */
165 0c98da8b 2005-07-13 devnull if(bno < ppb){
166 0c98da8b 2005-07-13 devnull b = ext2datablock(fs, ino->block[INDBLOCK], fs->blocksize);
167 0c98da8b 2005-07-13 devnull if(b == nil)
168 0c98da8b 2005-07-13 devnull return nil;
169 0c98da8b 2005-07-13 devnull a = (u32int*)b->data;
170 0c98da8b 2005-07-13 devnull bno = a[bno%ppb];
171 0c98da8b 2005-07-13 devnull blockput(b);
172 0c98da8b 2005-07-13 devnull return ext2datablock(fs, bno, size);
174 0c98da8b 2005-07-13 devnull bno -= ppb;
176 0c98da8b 2005-07-13 devnull /* one double indirect */
177 0c98da8b 2005-07-13 devnull if(bno < ppb*ppb){
178 0c98da8b 2005-07-13 devnull b = ext2datablock(fs, ino->block[DINDBLOCK], fs->blocksize);
179 0c98da8b 2005-07-13 devnull if(b == nil)
180 0c98da8b 2005-07-13 devnull return nil;
181 0c98da8b 2005-07-13 devnull a = (u32int*)b->data;
182 0c98da8b 2005-07-13 devnull bno = a[(bno/ppb)%ppb];
183 0c98da8b 2005-07-13 devnull blockput(b);
184 0c98da8b 2005-07-13 devnull b = ext2datablock(fs, bno, fs->blocksize);
185 0c98da8b 2005-07-13 devnull if(b == nil)
186 0c98da8b 2005-07-13 devnull return nil;
187 0c98da8b 2005-07-13 devnull a = (u32int*)b->data;
188 0c98da8b 2005-07-13 devnull bno = a[bno%ppb];
189 0c98da8b 2005-07-13 devnull blockput(b);
190 0c98da8b 2005-07-13 devnull return ext2datablock(fs, bno, size);
192 0c98da8b 2005-07-13 devnull bno -= ppb*ppb;
194 0c98da8b 2005-07-13 devnull /* one triple indirect */
195 0c98da8b 2005-07-13 devnull if(bno < ppb*ppb*ppb){
196 0c98da8b 2005-07-13 devnull b = ext2datablock(fs, ino->block[TINDBLOCK], fs->blocksize);
197 0c98da8b 2005-07-13 devnull if(b == nil)
198 0c98da8b 2005-07-13 devnull return nil;
199 0c98da8b 2005-07-13 devnull a = (u32int*)b->data;
200 0c98da8b 2005-07-13 devnull bno = a[(bno/(ppb*ppb))%ppb];
201 0c98da8b 2005-07-13 devnull blockput(b);
202 0c98da8b 2005-07-13 devnull b = ext2datablock(fs, bno, fs->blocksize);
203 0c98da8b 2005-07-13 devnull if(b == nil)
204 0c98da8b 2005-07-13 devnull return nil;
205 0c98da8b 2005-07-13 devnull a = (u32int*)b->data;
206 0c98da8b 2005-07-13 devnull bno = a[(bno/ppb)%ppb];
207 0c98da8b 2005-07-13 devnull blockput(b);
208 0c98da8b 2005-07-13 devnull b = ext2datablock(fs, bno, fs->blocksize);
209 0c98da8b 2005-07-13 devnull if(b == nil)
210 0c98da8b 2005-07-13 devnull return nil;
211 0c98da8b 2005-07-13 devnull a = (u32int*)b->data;
212 0c98da8b 2005-07-13 devnull bno = a[bno%ppb];
213 0c98da8b 2005-07-13 devnull blockput(b);
214 0c98da8b 2005-07-13 devnull return ext2datablock(fs, bno, size);
217 3330e5bf 2005-10-29 devnull fprint(2, "ext2fileblock %ud: too big\n", obno);
218 0c98da8b 2005-07-13 devnull return nil;
221 0c98da8b 2005-07-13 devnull static int
222 0c98da8b 2005-07-13 devnull checksuper(Super *super)
224 0c98da8b 2005-07-13 devnull if(super->magic != SUPERMAGIC){
225 0c98da8b 2005-07-13 devnull werrstr("bad magic 0x%ux wanted 0x%ux", super->magic, SUPERMAGIC);
226 0c98da8b 2005-07-13 devnull return -1;
228 0c98da8b 2005-07-13 devnull return 0;
231 0c98da8b 2005-07-13 devnull static int
232 0c98da8b 2005-07-13 devnull ext2sync(Fsys *fsys)
235 0c98da8b 2005-07-13 devnull Group *g;
236 0c98da8b 2005-07-13 devnull Block *b;
237 0c98da8b 2005-07-13 devnull Super *super;
238 0c98da8b 2005-07-13 devnull Ext2 *fs;
239 0c98da8b 2005-07-13 devnull Disk *disk;
241 0c98da8b 2005-07-13 devnull fs = fsys->priv;
242 0c98da8b 2005-07-13 devnull disk = fs->disk;
243 0c98da8b 2005-07-13 devnull if((b = diskread(disk, SBSIZE, SBOFF)) == nil)
244 0c98da8b 2005-07-13 devnull goto error;
245 0c98da8b 2005-07-13 devnull super = (Super*)b->data;
246 0c98da8b 2005-07-13 devnull if(checksuper(super) < 0)
247 0c98da8b 2005-07-13 devnull goto error;
248 0c98da8b 2005-07-13 devnull fs->blocksize = MINBLOCKSIZE<<super->logblocksize;
249 0c98da8b 2005-07-13 devnull fs->nblock = super->nblock;
250 0c98da8b 2005-07-13 devnull fs->ngroup = (super->nblock+super->blockspergroup-1)
251 0c98da8b 2005-07-13 devnull / super->blockspergroup;
252 0c98da8b 2005-07-13 devnull fs->inospergroup = super->inospergroup;
253 0c98da8b 2005-07-13 devnull fs->blockspergroup = super->blockspergroup;
254 0c98da8b 2005-07-13 devnull fs->inosperblock = fs->blocksize / InodeSize;
255 0c98da8b 2005-07-13 devnull if(fs->blocksize == SBOFF)
256 0c98da8b 2005-07-13 devnull fs->groupaddr = 2;
258 0c98da8b 2005-07-13 devnull fs->groupaddr = 1;
259 0c98da8b 2005-07-13 devnull fs->descperblock = fs->blocksize / GroupSize;
260 0c98da8b 2005-07-13 devnull fs->firstblock = super->firstdatablock;
261 0c98da8b 2005-07-13 devnull blockput(b);
263 0c98da8b 2005-07-13 devnull fsys->blocksize = fs->blocksize;
264 0c98da8b 2005-07-13 devnull fsys->nblock = fs->nblock;
265 0c98da8b 2005-07-13 devnull fprint(2, "ext2 %d %d-byte blocks, first data block %d, %d groups of %d\n",
266 0c98da8b 2005-07-13 devnull fs->nblock, fs->blocksize, fs->firstblock, fs->ngroup, fs->blockspergroup);
269 0c98da8b 2005-07-13 devnull for(i=0; i<fs->ngroup; i++)
270 0c98da8b 2005-07-13 devnull if((g = ext2group(fs, i, &b)) != nil){
271 0c98da8b 2005-07-13 devnull fprint(2, "grp %d: bitblock=%d\n", i, g->bitblock);
272 0c98da8b 2005-07-13 devnull blockput(b);
275 0c98da8b 2005-07-13 devnull return 0;
278 0c98da8b 2005-07-13 devnull blockput(b);
279 0c98da8b 2005-07-13 devnull return -1;
282 0c98da8b 2005-07-13 devnull static void
283 0c98da8b 2005-07-13 devnull mkhandle(Nfs3Handle *h, u64int ino)
285 0c98da8b 2005-07-13 devnull h->h[0] = ino>>24;
286 0c98da8b 2005-07-13 devnull h->h[1] = ino>>16;
287 0c98da8b 2005-07-13 devnull h->h[2] = ino>>8;
288 0c98da8b 2005-07-13 devnull h->h[3] = ino;
289 0c98da8b 2005-07-13 devnull h->len = 4;
292 0c98da8b 2005-07-13 devnull static u32int
293 0c98da8b 2005-07-13 devnull byte2u32(uchar *p)
295 0c98da8b 2005-07-13 devnull return (p[0]<<24) | (p[1]<<16) | (p[2]<<8) | p[3];
298 0c98da8b 2005-07-13 devnull static Nfs3Status
299 0c98da8b 2005-07-13 devnull handle2ino(Ext2 *fs, Nfs3Handle *h, u32int *pinum, Inode *ino)
302 0c98da8b 2005-07-13 devnull uint ioff;
303 0c98da8b 2005-07-13 devnull u32int inum;
304 0c98da8b 2005-07-13 devnull u32int addr;
305 0c98da8b 2005-07-13 devnull Block *gb, *b;
306 0c98da8b 2005-07-13 devnull Group *g;
308 0c98da8b 2005-07-13 devnull if(h->len != 4)
309 0c98da8b 2005-07-13 devnull return Nfs3ErrBadHandle;
310 0c98da8b 2005-07-13 devnull inum = byte2u32(h->h);
311 0c98da8b 2005-07-13 devnull if(pinum)
312 0c98da8b 2005-07-13 devnull *pinum = inum;
313 0c98da8b 2005-07-13 devnull i = (inum-1) / fs->inospergroup;
314 0c98da8b 2005-07-13 devnull if(i >= fs->ngroup)
315 0c98da8b 2005-07-13 devnull return Nfs3ErrBadHandle;
316 0c98da8b 2005-07-13 devnull ioff = (inum-1) % fs->inospergroup;
317 0c98da8b 2005-07-13 devnull if((g = ext2group(fs, i, &gb)) == nil)
318 0c98da8b 2005-07-13 devnull return Nfs3ErrIo;
319 0c98da8b 2005-07-13 devnull addr = g->inodeaddr + ioff/fs->inosperblock;
320 0c98da8b 2005-07-13 devnull blockput(gb);
321 0c98da8b 2005-07-13 devnull if((b = diskread(fs->disk, fs->blocksize, (u64int)addr*fs->blocksize)) == nil)
322 0c98da8b 2005-07-13 devnull return Nfs3ErrIo;
323 0c98da8b 2005-07-13 devnull *ino = ((Inode*)b->data)[ioff%fs->inosperblock];
324 0c98da8b 2005-07-13 devnull blockput(b);
325 0c98da8b 2005-07-13 devnull return Nfs3Ok;
328 0c98da8b 2005-07-13 devnull static Nfs3Status
329 0c98da8b 2005-07-13 devnull ext2root(Fsys *fsys, Nfs3Handle *h)
331 3330e5bf 2005-10-29 devnull USED(fsys);
332 0c98da8b 2005-07-13 devnull mkhandle(h, ROOTINODE);
333 0c98da8b 2005-07-13 devnull return Nfs3Ok;
336 0c98da8b 2005-07-13 devnull static Nfs3Status
337 0c98da8b 2005-07-13 devnull ino2attr(Ext2 *fs, Inode *ino, u32int inum, Nfs3Attr *attr)
339 0c98da8b 2005-07-13 devnull u32int rdev;
341 0c98da8b 2005-07-13 devnull attr->type = -1;
342 0c98da8b 2005-07-13 devnull switch(ino->mode&IFMT){
343 0c98da8b 2005-07-13 devnull case IFIFO:
344 0c98da8b 2005-07-13 devnull attr->type = Nfs3FileFifo;
346 0c98da8b 2005-07-13 devnull case IFCHR:
347 0c98da8b 2005-07-13 devnull attr->type = Nfs3FileChar;
349 0c98da8b 2005-07-13 devnull case IFDIR:
350 0c98da8b 2005-07-13 devnull attr->type = Nfs3FileDir;
352 0c98da8b 2005-07-13 devnull case IFBLK:
353 0c98da8b 2005-07-13 devnull attr->type = Nfs3FileBlock;
355 0c98da8b 2005-07-13 devnull case IFREG:
356 0c98da8b 2005-07-13 devnull attr->type = Nfs3FileReg;
358 0c98da8b 2005-07-13 devnull case IFLNK:
359 0c98da8b 2005-07-13 devnull attr->type = Nfs3FileSymlink;
361 0c98da8b 2005-07-13 devnull case IFSOCK:
362 0c98da8b 2005-07-13 devnull attr->type = Nfs3FileSocket;
364 0c98da8b 2005-07-13 devnull case IFWHT:
365 0c98da8b 2005-07-13 devnull default:
366 0c98da8b 2005-07-13 devnull return Nfs3ErrBadHandle;
369 0c98da8b 2005-07-13 devnull attr->mode = ino->mode&07777;
370 0c98da8b 2005-07-13 devnull attr->nlink = ino->nlink;
371 0c98da8b 2005-07-13 devnull attr->uid = ino->uid;
372 0c98da8b 2005-07-13 devnull attr->gid = ino->gid;
373 0c98da8b 2005-07-13 devnull attr->size = ino->size;
374 0c98da8b 2005-07-13 devnull attr->used = ino->nblock*fs->blocksize;
375 0c98da8b 2005-07-13 devnull if(attr->type==Nfs3FileBlock || attr->type==Nfs3FileChar){
376 0c98da8b 2005-07-13 devnull rdev = ino->block[0];
377 0c98da8b 2005-07-13 devnull attr->major = (rdev>>8)&0xFF;
378 0c98da8b 2005-07-13 devnull attr->minor = rdev & 0xFFFF00FF;
380 0c98da8b 2005-07-13 devnull attr->major = 0;
381 0c98da8b 2005-07-13 devnull attr->minor = 0;
383 0c98da8b 2005-07-13 devnull attr->fsid = 0;
384 0c98da8b 2005-07-13 devnull attr->fileid = inum;
385 0c98da8b 2005-07-13 devnull attr->atime.sec = ino->atime;
386 0c98da8b 2005-07-13 devnull attr->atime.nsec = 0;
387 0c98da8b 2005-07-13 devnull attr->mtime.sec = ino->mtime;
388 0c98da8b 2005-07-13 devnull attr->mtime.nsec = 0;
389 0c98da8b 2005-07-13 devnull attr->ctime.sec = ino->ctime;
390 0c98da8b 2005-07-13 devnull attr->ctime.nsec = 0;
391 0c98da8b 2005-07-13 devnull return Nfs3Ok;
394 0c98da8b 2005-07-13 devnull static int
395 0c98da8b 2005-07-13 devnull ingroup(SunAuthUnix *au, uint gid)
399 0c98da8b 2005-07-13 devnull for(i=0; i<au->ng; i++)
400 0c98da8b 2005-07-13 devnull if(au->g[i] == gid)
401 0c98da8b 2005-07-13 devnull return 1;
402 0c98da8b 2005-07-13 devnull return 0;
405 0c98da8b 2005-07-13 devnull static Nfs3Status
406 0c98da8b 2005-07-13 devnull inoperm(Inode *ino, SunAuthUnix *au, int need)
408 0c98da8b 2005-07-13 devnull int have;
410 0c98da8b 2005-07-13 devnull if(allowall)
411 0c98da8b 2005-07-13 devnull return Nfs3Ok;
413 0c98da8b 2005-07-13 devnull have = ino->mode&0777;
414 0c98da8b 2005-07-13 devnull if(ino->uid == au->uid)
415 0c98da8b 2005-07-13 devnull have >>= 6;
416 0c98da8b 2005-07-13 devnull else if(ino->gid == au->gid || ingroup(au, ino->gid))
417 0c98da8b 2005-07-13 devnull have >>= 3;
419 0c98da8b 2005-07-13 devnull if((have&need) != need)
420 0c98da8b 2005-07-13 devnull return Nfs3ErrNotOwner; /* really EPERM */
421 0c98da8b 2005-07-13 devnull return Nfs3Ok;
424 0c98da8b 2005-07-13 devnull static Nfs3Status
425 0c98da8b 2005-07-13 devnull ext2getattr(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, Nfs3Attr *attr)
427 0c98da8b 2005-07-13 devnull Inode ino;
428 0c98da8b 2005-07-13 devnull u32int inum;
429 0c98da8b 2005-07-13 devnull Ext2 *fs;
430 0c98da8b 2005-07-13 devnull Nfs3Status ok;
432 0c98da8b 2005-07-13 devnull fs = fsys->priv;
433 0c98da8b 2005-07-13 devnull if((ok = handle2ino(fs, h, &inum, &ino)) != Nfs3Ok)
434 0c98da8b 2005-07-13 devnull return ok;
436 0c98da8b 2005-07-13 devnull USED(au); /* anyone can getattr */
437 0c98da8b 2005-07-13 devnull return ino2attr(fs, &ino, inum, attr);
440 0c98da8b 2005-07-13 devnull static Nfs3Status
441 0c98da8b 2005-07-13 devnull ext2access(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int want, u32int *got, Nfs3Attr *attr)
443 0c98da8b 2005-07-13 devnull int have;
444 0c98da8b 2005-07-13 devnull Inode ino;
445 0c98da8b 2005-07-13 devnull u32int inum;
446 0c98da8b 2005-07-13 devnull Ext2 *fs;
447 0c98da8b 2005-07-13 devnull Nfs3Status ok;
449 0c98da8b 2005-07-13 devnull fs = fsys->priv;
450 0c98da8b 2005-07-13 devnull if((ok = handle2ino(fs, h, &inum, &ino)) != Nfs3Ok)
451 0c98da8b 2005-07-13 devnull return ok;
453 0c98da8b 2005-07-13 devnull have = ino.mode&0777;
454 0c98da8b 2005-07-13 devnull if(ino.uid == au->uid)
455 0c98da8b 2005-07-13 devnull have >>= 6;
456 0c98da8b 2005-07-13 devnull else if(ino.gid == au->gid || ingroup(au, ino.gid))
457 0c98da8b 2005-07-13 devnull have >>= 3;
459 0c98da8b 2005-07-13 devnull *got = 0;
460 0c98da8b 2005-07-13 devnull if((want&Nfs3AccessRead) && (have&AREAD))
461 0c98da8b 2005-07-13 devnull *got |= Nfs3AccessRead;
462 0c98da8b 2005-07-13 devnull if((want&Nfs3AccessLookup) && (ino.mode&IFMT)==IFDIR && (have&AEXEC))
463 0c98da8b 2005-07-13 devnull *got |= Nfs3AccessLookup;
464 0c98da8b 2005-07-13 devnull if((want&Nfs3AccessExecute) && (ino.mode&IFMT)!=IFDIR && (have&AEXEC))
465 0c98da8b 2005-07-13 devnull *got |= Nfs3AccessExecute;
467 0c98da8b 2005-07-13 devnull return ino2attr(fs, &ino, inum, attr);
470 0c98da8b 2005-07-13 devnull static Nfs3Status
471 0c98da8b 2005-07-13 devnull ext2lookup(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, char *name, Nfs3Handle *nh)
473 0c98da8b 2005-07-13 devnull u32int nblock;
474 0c98da8b 2005-07-13 devnull u32int i;
475 0c98da8b 2005-07-13 devnull uchar *p, *ep;
476 0c98da8b 2005-07-13 devnull Dirent *de;
477 0c98da8b 2005-07-13 devnull Inode ino;
478 0c98da8b 2005-07-13 devnull Block *b;
479 0c98da8b 2005-07-13 devnull Ext2 *fs;
480 0c98da8b 2005-07-13 devnull Nfs3Status ok;
481 0c98da8b 2005-07-13 devnull int len, want;
483 0c98da8b 2005-07-13 devnull fs = fsys->priv;
484 0c98da8b 2005-07-13 devnull if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok)
485 0c98da8b 2005-07-13 devnull return ok;
487 0c98da8b 2005-07-13 devnull if((ino.mode&IFMT) != IFDIR)
488 0c98da8b 2005-07-13 devnull return Nfs3ErrNotDir;
490 0c98da8b 2005-07-13 devnull if((ok = inoperm(&ino, au, AEXEC)) != Nfs3Ok)
491 0c98da8b 2005-07-13 devnull return ok;
493 0c98da8b 2005-07-13 devnull len = strlen(name);
494 0c98da8b 2005-07-13 devnull nblock = (ino.size+fs->blocksize-1) / fs->blocksize;
495 0c98da8b 2005-07-13 devnull if(debug) fprint(2, "%d blocks in dir...", nblock);
496 0c98da8b 2005-07-13 devnull for(i=0; i<nblock; i++){
497 0c98da8b 2005-07-13 devnull if(i==nblock-1)
498 0c98da8b 2005-07-13 devnull want = ino.size % fs->blocksize;
500 0c98da8b 2005-07-13 devnull want = fs->blocksize;
501 0c98da8b 2005-07-13 devnull b = ext2fileblock(fs, &ino, i, want);
502 0c98da8b 2005-07-13 devnull if(b == nil){
503 0c98da8b 2005-07-13 devnull if(debug) fprint(2, "empty block...");
504 0c98da8b 2005-07-13 devnull continue;
506 0c98da8b 2005-07-13 devnull p = b->data;
507 0c98da8b 2005-07-13 devnull ep = p+b->len;
508 0c98da8b 2005-07-13 devnull while(p < ep){
509 0c98da8b 2005-07-13 devnull de = (Dirent*)p;
510 0c98da8b 2005-07-13 devnull if(de->reclen == 0){
511 0c98da8b 2005-07-13 devnull if(debug)
512 0c98da8b 2005-07-13 devnull fprint(2, "reclen 0 at offset %d of %d\n", (int)(p-b->data), b->len);
515 0c98da8b 2005-07-13 devnull p += de->reclen;
516 0c98da8b 2005-07-13 devnull if(p > ep){
517 0c98da8b 2005-07-13 devnull if(debug)
518 0c98da8b 2005-07-13 devnull fprint(2, "bad len %d at offset %d of %d\n", de->reclen, (int)(p-b->data), b->len);
521 0c98da8b 2005-07-13 devnull if(de->ino == 0)
522 0c98da8b 2005-07-13 devnull continue;
523 0c98da8b 2005-07-13 devnull if(4+2+2+de->namlen > de->reclen){
524 0c98da8b 2005-07-13 devnull if(debug)
525 0c98da8b 2005-07-13 devnull fprint(2, "bad namelen %d at offset %d of %d\n", de->namlen, (int)(p-b->data), b->len);
528 0c98da8b 2005-07-13 devnull if(de->namlen == len && memcmp(de->name, name, len) == 0){
529 0c98da8b 2005-07-13 devnull mkhandle(nh, de->ino);
530 0c98da8b 2005-07-13 devnull blockput(b);
531 0c98da8b 2005-07-13 devnull return Nfs3Ok;
534 0c98da8b 2005-07-13 devnull blockput(b);
536 0c98da8b 2005-07-13 devnull return Nfs3ErrNoEnt;
539 0c98da8b 2005-07-13 devnull static Nfs3Status
540 0c98da8b 2005-07-13 devnull ext2readdir(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int count, u64int cookie, uchar **pdata, u32int *pcount, u1int *peof)
542 0c98da8b 2005-07-13 devnull u32int nblock;
543 0c98da8b 2005-07-13 devnull u32int i;
544 0c98da8b 2005-07-13 devnull int off, done;
545 0c98da8b 2005-07-13 devnull uchar *data, *dp, *dep, *p, *ep, *ndp;
546 0c98da8b 2005-07-13 devnull Dirent *de;
547 0c98da8b 2005-07-13 devnull Inode ino;
548 0c98da8b 2005-07-13 devnull Block *b;
549 0c98da8b 2005-07-13 devnull Ext2 *fs;
550 0c98da8b 2005-07-13 devnull Nfs3Status ok;
551 0c98da8b 2005-07-13 devnull Nfs3Entry e;
552 0c98da8b 2005-07-13 devnull int want;
554 0c98da8b 2005-07-13 devnull fs = fsys->priv;
555 0c98da8b 2005-07-13 devnull if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok)
556 0c98da8b 2005-07-13 devnull return ok;
558 0c98da8b 2005-07-13 devnull if((ino.mode&IFMT) != IFDIR)
559 0c98da8b 2005-07-13 devnull return Nfs3ErrNotDir;
561 0c98da8b 2005-07-13 devnull if((ok = inoperm(&ino, au, AREAD)) != Nfs3Ok)
562 0c98da8b 2005-07-13 devnull return ok;
564 0c98da8b 2005-07-13 devnull if(cookie >= ino.size){
565 0c98da8b 2005-07-13 devnull *pcount = 0;
566 0c98da8b 2005-07-13 devnull *pdata = 0;
567 0c98da8b 2005-07-13 devnull return Nfs3Ok;
570 0c98da8b 2005-07-13 devnull dp = malloc(count);
571 0c98da8b 2005-07-13 devnull data = dp;
572 0c98da8b 2005-07-13 devnull if(dp == nil)
573 0c98da8b 2005-07-13 devnull return Nfs3ErrNoMem;
574 0c98da8b 2005-07-13 devnull dep = dp+count;
575 0c98da8b 2005-07-13 devnull *peof = 0;
576 0c98da8b 2005-07-13 devnull nblock = (ino.size+fs->blocksize-1) / fs->blocksize;
577 0c98da8b 2005-07-13 devnull i = cookie/fs->blocksize;
578 0c98da8b 2005-07-13 devnull off = cookie%fs->blocksize;
579 0c98da8b 2005-07-13 devnull done = 0;
580 0c98da8b 2005-07-13 devnull for(; i<nblock && !done; i++){
581 0c98da8b 2005-07-13 devnull if(i==nblock-1)
582 0c98da8b 2005-07-13 devnull want = ino.size % fs->blocksize;
584 0c98da8b 2005-07-13 devnull want = fs->blocksize;
585 0c98da8b 2005-07-13 devnull b = ext2fileblock(fs, &ino, i, want);
586 0c98da8b 2005-07-13 devnull if(b == nil)
587 0c98da8b 2005-07-13 devnull continue;
588 0c98da8b 2005-07-13 devnull p = b->data;
589 0c98da8b 2005-07-13 devnull ep = p+b->len;
590 0c98da8b 2005-07-13 devnull memset(&e, 0, sizeof e);
591 0c98da8b 2005-07-13 devnull while(p < ep){
592 0c98da8b 2005-07-13 devnull de = (Dirent*)p;
593 0c98da8b 2005-07-13 devnull if(de->reclen == 0){
594 0c98da8b 2005-07-13 devnull if(debug) fprint(2, "reclen 0 at offset %d of %d\n", (int)(p-b->data), b->len);
597 0c98da8b 2005-07-13 devnull p += de->reclen;
598 0c98da8b 2005-07-13 devnull if(p > ep){
599 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);
602 0c98da8b 2005-07-13 devnull if(de->ino == 0){
603 0c98da8b 2005-07-13 devnull if(debug) fprint(2, "zero inode\n");
604 0c98da8b 2005-07-13 devnull continue;
606 0c98da8b 2005-07-13 devnull if(4+2+2+de->namlen > de->reclen){
607 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);
610 e77222a4 2006-05-04 devnull if(debug) print("%.*s/%d ", de->namlen, de->name, (int)de->ino);
611 0c98da8b 2005-07-13 devnull if((uchar*)de - b->data < off)
612 0c98da8b 2005-07-13 devnull continue;
613 0c98da8b 2005-07-13 devnull e.fileid = de->ino;
614 0c98da8b 2005-07-13 devnull e.name = de->name;
615 e77222a4 2006-05-04 devnull e.namelen = de->namlen;
616 0c98da8b 2005-07-13 devnull e.cookie = (u64int)i*fs->blocksize + (p - b->data);
617 0c98da8b 2005-07-13 devnull if(nfs3entrypack(dp, dep, &ndp, &e) < 0){
618 0c98da8b 2005-07-13 devnull done = 1;
621 0c98da8b 2005-07-13 devnull dp = ndp;
623 0c98da8b 2005-07-13 devnull off = 0;
624 0c98da8b 2005-07-13 devnull blockput(b);
626 0c98da8b 2005-07-13 devnull if(i==nblock)
627 0c98da8b 2005-07-13 devnull *peof = 1;
629 0c98da8b 2005-07-13 devnull *pcount = dp - data;
630 0c98da8b 2005-07-13 devnull *pdata = data;
631 0c98da8b 2005-07-13 devnull return Nfs3Ok;
634 0c98da8b 2005-07-13 devnull static Nfs3Status
635 0c98da8b 2005-07-13 devnull ext2readfile(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int count,
636 0c98da8b 2005-07-13 devnull u64int offset, uchar **pdata, u32int *pcount, u1int *peof)
638 0c98da8b 2005-07-13 devnull uchar *data;
639 0c98da8b 2005-07-13 devnull Block *b;
640 0c98da8b 2005-07-13 devnull Ext2 *fs;
641 0c98da8b 2005-07-13 devnull int off, want, fragcount;
642 0c98da8b 2005-07-13 devnull Inode ino;
643 0c98da8b 2005-07-13 devnull Nfs3Status ok;
645 0c98da8b 2005-07-13 devnull fs = fsys->priv;
646 0c98da8b 2005-07-13 devnull if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok)
647 0c98da8b 2005-07-13 devnull return ok;
649 0c98da8b 2005-07-13 devnull if((ok = inoperm(&ino, au, AREAD)) != Nfs3Ok)
650 0c98da8b 2005-07-13 devnull return ok;
652 0c98da8b 2005-07-13 devnull if(offset >= ino.size){
653 0c98da8b 2005-07-13 devnull *pdata = 0;
654 0c98da8b 2005-07-13 devnull *pcount = 0;
655 0c98da8b 2005-07-13 devnull *peof = 1;
656 0c98da8b 2005-07-13 devnull return Nfs3Ok;
658 0c98da8b 2005-07-13 devnull if(offset+count > ino.size)
659 0c98da8b 2005-07-13 devnull count = ino.size-offset;
660 0c98da8b 2005-07-13 devnull if(offset/fs->blocksize != (offset+count-1)/fs->blocksize)
661 0c98da8b 2005-07-13 devnull count = fs->blocksize - offset%fs->blocksize;
663 0c98da8b 2005-07-13 devnull data = malloc(count);
664 0c98da8b 2005-07-13 devnull if(data == nil)
665 0c98da8b 2005-07-13 devnull return Nfs3ErrNoMem;
667 0c98da8b 2005-07-13 devnull want = offset%fs->blocksize+count;
668 0c98da8b 2005-07-13 devnull if(want%fs->blocksize)
669 0c98da8b 2005-07-13 devnull want += fs->blocksize - want%fs->blocksize;
671 0c98da8b 2005-07-13 devnull b = ext2fileblock(fs, &ino, offset/fs->blocksize, want);
672 0c98da8b 2005-07-13 devnull if(b == nil){
673 0c98da8b 2005-07-13 devnull /* BUG: distinguish sparse file from I/O error */
674 0c98da8b 2005-07-13 devnull memset(data, 0, count);
676 0c98da8b 2005-07-13 devnull off = offset%fs->blocksize;
677 0c98da8b 2005-07-13 devnull fragcount = count; /* need signed variable */
678 0c98da8b 2005-07-13 devnull if(off+fragcount > b->len){
679 0c98da8b 2005-07-13 devnull fragcount = b->len - off;
680 0c98da8b 2005-07-13 devnull if(fragcount < 0)
681 0c98da8b 2005-07-13 devnull fragcount = 0;
683 0c98da8b 2005-07-13 devnull if(fragcount > 0)
684 0c98da8b 2005-07-13 devnull memmove(data, b->data+off, fragcount);
685 0c98da8b 2005-07-13 devnull count = fragcount;
686 0c98da8b 2005-07-13 devnull blockput(b);
688 0c98da8b 2005-07-13 devnull *peof = (offset+count == ino.size);
689 0c98da8b 2005-07-13 devnull *pcount = count;
690 0c98da8b 2005-07-13 devnull *pdata = data;
691 0c98da8b 2005-07-13 devnull return Nfs3Ok;
694 0c98da8b 2005-07-13 devnull static Nfs3Status
695 0c98da8b 2005-07-13 devnull ext2readlink(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, char **link)
697 0c98da8b 2005-07-13 devnull Ext2 *fs;
698 0c98da8b 2005-07-13 devnull Nfs3Status ok;
699 0c98da8b 2005-07-13 devnull int len;
700 0c98da8b 2005-07-13 devnull Inode ino;
701 0c98da8b 2005-07-13 devnull Block *b;
703 0c98da8b 2005-07-13 devnull fs = fsys->priv;
704 0c98da8b 2005-07-13 devnull if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok)
705 0c98da8b 2005-07-13 devnull return ok;
706 0c98da8b 2005-07-13 devnull if((ok = inoperm(&ino, au, AREAD)) != Nfs3Ok)
707 0c98da8b 2005-07-13 devnull return ok;
709 0c98da8b 2005-07-13 devnull if(ino.size > 1024)
710 0c98da8b 2005-07-13 devnull return Nfs3ErrIo;
711 0c98da8b 2005-07-13 devnull len = ino.size;
713 0c98da8b 2005-07-13 devnull if(ino.nblock != 0){
714 0c98da8b 2005-07-13 devnull /* BUG: assumes symlink fits in one block */
715 0c98da8b 2005-07-13 devnull b = ext2fileblock(fs, &ino, 0, len);
716 0c98da8b 2005-07-13 devnull if(b == nil)
717 0c98da8b 2005-07-13 devnull return Nfs3ErrIo;
718 0c98da8b 2005-07-13 devnull if(memchr(b->data, 0, len) != nil){
719 0c98da8b 2005-07-13 devnull blockput(b);
720 0c98da8b 2005-07-13 devnull return Nfs3ErrIo;
722 0c98da8b 2005-07-13 devnull *link = malloc(len+1);
723 0c98da8b 2005-07-13 devnull if(*link == 0){
724 0c98da8b 2005-07-13 devnull blockput(b);
725 0c98da8b 2005-07-13 devnull return Nfs3ErrNoMem;
727 0c98da8b 2005-07-13 devnull memmove(*link, b->data, len);
728 0c98da8b 2005-07-13 devnull (*link)[len] = 0;
729 0c98da8b 2005-07-13 devnull blockput(b);
730 0c98da8b 2005-07-13 devnull return Nfs3Ok;
733 0c98da8b 2005-07-13 devnull if(len > sizeof ino.block)
734 0c98da8b 2005-07-13 devnull return Nfs3ErrIo;
736 0c98da8b 2005-07-13 devnull *link = malloc(len+1);
737 0c98da8b 2005-07-13 devnull if(*link == 0)
738 0c98da8b 2005-07-13 devnull return Nfs3ErrNoMem;
739 0c98da8b 2005-07-13 devnull memmove(*link, ino.block, ino.size);
740 0c98da8b 2005-07-13 devnull (*link)[len] = 0;
741 0c98da8b 2005-07-13 devnull return Nfs3Ok;