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"
  8 0c98da8b 2005-07-13 devnull 
  9 e77222a4 2006-05-04 devnull #define debug 0
 10 0c98da8b 2005-07-13 devnull 
 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);
 14 0c98da8b 2005-07-13 devnull 
 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);
 22 0c98da8b 2005-07-13 devnull 
 23 0c98da8b 2005-07-13 devnull Fsys*
 24 0c98da8b 2005-07-13 devnull fsysopenext2(Disk *disk)
 25 0c98da8b 2005-07-13 devnull {
 26 0c98da8b 2005-07-13 devnull 	Ext2 *fs;
 27 0c98da8b 2005-07-13 devnull 	Fsys *fsys;
 28 0c98da8b 2005-07-13 devnull 
 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;
 44 a51dffd3 2006-11-20 devnull 	fsys->_close = ext2close;
 45 0c98da8b 2005-07-13 devnull 
 46 0c98da8b 2005-07-13 devnull 	if(ext2sync(fsys) < 0)
 47 0c98da8b 2005-07-13 devnull 		goto error;
 48 0c98da8b 2005-07-13 devnull 
 49 0c98da8b 2005-07-13 devnull 	return fsys;
 50 0c98da8b 2005-07-13 devnull 
 51 0c98da8b 2005-07-13 devnull error:
 52 0c98da8b 2005-07-13 devnull 	ext2close(fsys);
 53 0c98da8b 2005-07-13 devnull 	return nil;
 54 0c98da8b 2005-07-13 devnull }
 55 0c98da8b 2005-07-13 devnull 
 56 0c98da8b 2005-07-13 devnull static void
 57 0c98da8b 2005-07-13 devnull ext2close(Fsys *fsys)
 58 0c98da8b 2005-07-13 devnull {
 59 0c98da8b 2005-07-13 devnull 	Ext2 *fs;
 60 0c98da8b 2005-07-13 devnull 
 61 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
 62 0c98da8b 2005-07-13 devnull 	free(fs);
 63 0c98da8b 2005-07-13 devnull 	free(fsys);
 64 0c98da8b 2005-07-13 devnull }
 65 0c98da8b 2005-07-13 devnull 
 66 0c98da8b 2005-07-13 devnull static Group*
 67 0c98da8b 2005-07-13 devnull ext2group(Ext2 *fs, u32int i, Block **pb)
 68 0c98da8b 2005-07-13 devnull {
 69 0c98da8b 2005-07-13 devnull 	Block *b;
 70 0c98da8b 2005-07-13 devnull 	u64int addr;
 71 0c98da8b 2005-07-13 devnull 	Group *g;
 72 0c98da8b 2005-07-13 devnull 
 73 0c98da8b 2005-07-13 devnull 	if(i >= fs->ngroup)
 74 0c98da8b 2005-07-13 devnull 		return nil;
 75 0c98da8b 2005-07-13 devnull 
 76 0c98da8b 2005-07-13 devnull 	addr = fs->groupaddr + i/fs->descperblock;
 77 0c98da8b 2005-07-13 devnull 	b = diskread(fs->disk, fs->blocksize, addr*fs->blocksize);
 78 0c98da8b 2005-07-13 devnull 	if(b == nil)
 79 0c98da8b 2005-07-13 devnull 		return nil;
 80 0c98da8b 2005-07-13 devnull 	g = (Group*)(b->data+i%fs->descperblock*GroupSize);
 81 0c98da8b 2005-07-13 devnull 	*pb = b;
 82 0c98da8b 2005-07-13 devnull 	return g;
 83 0c98da8b 2005-07-13 devnull }
 84 0c98da8b 2005-07-13 devnull 
 85 0c98da8b 2005-07-13 devnull static Block*
 86 0c98da8b 2005-07-13 devnull ext2blockread(Fsys *fsys, u64int vbno)
 87 0c98da8b 2005-07-13 devnull {
 88 0c98da8b 2005-07-13 devnull 	Block *bitb;
 89 0c98da8b 2005-07-13 devnull 	Group *g;
 90 0c98da8b 2005-07-13 devnull 	Block *gb;
 91 0c98da8b 2005-07-13 devnull 	uchar *bits;
 92 c1a4592d 2006-06-15 devnull 	u32int bno, boff, bitblock;
 93 c1a4592d 2006-06-15 devnull 	u64int bitpos;
 94 0c98da8b 2005-07-13 devnull 	Ext2 *fs;
 95 0c98da8b 2005-07-13 devnull 
 96 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
 97 0c98da8b 2005-07-13 devnull 	if(vbno >= fs->nblock)
 98 0c98da8b 2005-07-13 devnull 		return nil;
 99 0c98da8b 2005-07-13 devnull 	bno = vbno;
100 0c98da8b 2005-07-13 devnull 	if(bno != vbno)
101 0c98da8b 2005-07-13 devnull 		return nil;
102 0c98da8b 2005-07-13 devnull 
103 0c98da8b 2005-07-13 devnull /*	
104 0c98da8b 2005-07-13 devnull 	if(bno < fs->firstblock)
105 0c98da8b 2005-07-13 devnull 		return diskread(fs->disk, fs->blocksize, (u64int)bno*fs->blocksize);
106 0c98da8b 2005-07-13 devnull */
107 0c98da8b 2005-07-13 devnull 	if(bno < fs->firstblock)
108 0c98da8b 2005-07-13 devnull 		return nil;
109 0c98da8b 2005-07-13 devnull 
110 0c98da8b 2005-07-13 devnull 	bno -= fs->firstblock;
111 0c98da8b 2005-07-13 devnull 	if((g = ext2group(fs, bno/fs->blockspergroup, &gb)) == nil){
112 0c98da8b 2005-07-13 devnull 		if(debug)
113 0c98da8b 2005-07-13 devnull 			fprint(2, "loading group: %r...");
114 0c98da8b 2005-07-13 devnull 		return nil;
115 0c98da8b 2005-07-13 devnull 	}
116 e77222a4 2006-05-04 devnull /*
117 c1a4592d 2006-06-15 devnull 	if(debug)
118 c1a4592d 2006-06-15 devnull 		fprint(2, "ext2 group %d: bitblock=%ud inodebitblock=%ud inodeaddr=%ud freeblocks=%ud freeinodes=%ud useddirs=%ud\n",
119 c1a4592d 2006-06-15 devnull 			(int)(bno/fs->blockspergroup),
120 c1a4592d 2006-06-15 devnull 			g->bitblock,
121 c1a4592d 2006-06-15 devnull 			g->inodebitblock,
122 c1a4592d 2006-06-15 devnull 			g->inodeaddr,
123 c1a4592d 2006-06-15 devnull 			g->freeblockscount,
124 c1a4592d 2006-06-15 devnull 			g->freeinodescount,
125 c1a4592d 2006-06-15 devnull 			g->useddirscount);
126 e77222a4 2006-05-04 devnull 	if(debug)
127 e77222a4 2006-05-04 devnull 		fprint(2, "group %d bitblock=%d...", bno/fs->blockspergroup, g->bitblock);
128 e77222a4 2006-05-04 devnull */
129 c1a4592d 2006-06-15 devnull 	bitblock = g->bitblock;
130 c1a4592d 2006-06-15 devnull 	bitpos = (u64int)bitblock*fs->blocksize;
131 9bbcb80d 2006-06-15 devnull 	blockput(gb);
132 0c98da8b 2005-07-13 devnull 
133 9bbcb80d 2006-06-15 devnull 	if((bitb = diskread(fs->disk, fs->blocksize, bitpos)) == nil){
134 0c98da8b 2005-07-13 devnull 		if(debug)
135 0c98da8b 2005-07-13 devnull 			fprint(2, "loading bitblock: %r...");
136 0c98da8b 2005-07-13 devnull 		return nil;
137 0c98da8b 2005-07-13 devnull 	}
138 0c98da8b 2005-07-13 devnull 	bits = bitb->data;
139 0c98da8b 2005-07-13 devnull 	boff = bno%fs->blockspergroup;
140 0c98da8b 2005-07-13 devnull 	if((bits[boff>>3] & (1<<(boff&7))) == 0){
141 0c98da8b 2005-07-13 devnull 		if(debug)
142 c1a4592d 2006-06-15 devnull 			fprint(2, "block %d not allocated in group %d: bitblock %d/%lld bits[%d] = %#x\n",
143 c1a4592d 2006-06-15 devnull 				boff, bno/fs->blockspergroup, 
144 c1a4592d 2006-06-15 devnull 				(int)bitblock,
145 c1a4592d 2006-06-15 devnull 				bitpos,
146 c1a4592d 2006-06-15 devnull 				boff>>3,
147 c1a4592d 2006-06-15 devnull 				bits[boff>>3]);
148 0c98da8b 2005-07-13 devnull 		blockput(bitb);
149 0c98da8b 2005-07-13 devnull 		return nil;
150 0c98da8b 2005-07-13 devnull 	}
151 9bbcb80d 2006-06-15 devnull 	blockput(bitb);
152 0c98da8b 2005-07-13 devnull 
153 0c98da8b 2005-07-13 devnull 	bno += fs->firstblock;
154 0c98da8b 2005-07-13 devnull 	return diskread(fs->disk, fs->blocksize, (u64int)bno*fs->blocksize);
155 0c98da8b 2005-07-13 devnull }
156 0c98da8b 2005-07-13 devnull 
157 0c98da8b 2005-07-13 devnull static Block*
158 0c98da8b 2005-07-13 devnull ext2datablock(Ext2 *fs, u32int bno, int size)
159 0c98da8b 2005-07-13 devnull {
160 3330e5bf 2005-10-29 devnull 	USED(size);
161 e77222a4 2006-05-04 devnull 	return ext2blockread(fs->fsys, bno);
162 0c98da8b 2005-07-13 devnull }
163 0c98da8b 2005-07-13 devnull 
164 0c98da8b 2005-07-13 devnull static Block*
165 0c98da8b 2005-07-13 devnull ext2fileblock(Ext2 *fs, Inode *ino, u32int bno, int size)
166 0c98da8b 2005-07-13 devnull {
167 0c98da8b 2005-07-13 devnull 	int ppb;
168 0c98da8b 2005-07-13 devnull 	Block *b;
169 0c98da8b 2005-07-13 devnull 	u32int *a;
170 0c98da8b 2005-07-13 devnull 	u32int obno;
171 0c98da8b 2005-07-13 devnull 
172 0c98da8b 2005-07-13 devnull 	obno = bno;
173 0c98da8b 2005-07-13 devnull 	if(bno < NDIRBLOCKS){
174 0c98da8b 2005-07-13 devnull 		if(debug)
175 0c98da8b 2005-07-13 devnull 			fprint(2, "fileblock %d -> %d...", 
176 0c98da8b 2005-07-13 devnull 				bno, ino->block[bno]);
177 0c98da8b 2005-07-13 devnull 		return ext2datablock(fs, ino->block[bno], size);
178 0c98da8b 2005-07-13 devnull 	}
179 0c98da8b 2005-07-13 devnull 	bno -= NDIRBLOCKS;
180 0c98da8b 2005-07-13 devnull 	ppb = fs->blocksize/4;
181 0c98da8b 2005-07-13 devnull 
182 0c98da8b 2005-07-13 devnull 	/* one indirect */
183 0c98da8b 2005-07-13 devnull 	if(bno < ppb){
184 0c98da8b 2005-07-13 devnull 		b = ext2datablock(fs, ino->block[INDBLOCK], 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);
191 0c98da8b 2005-07-13 devnull 	}
192 0c98da8b 2005-07-13 devnull 	bno -= ppb;
193 0c98da8b 2005-07-13 devnull 
194 0c98da8b 2005-07-13 devnull 	/* one double indirect */
195 0c98da8b 2005-07-13 devnull 	if(bno < ppb*ppb){
196 0c98da8b 2005-07-13 devnull 		b = ext2datablock(fs, ino->block[DINDBLOCK], 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];
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];
207 0c98da8b 2005-07-13 devnull 		blockput(b);
208 0c98da8b 2005-07-13 devnull 		return ext2datablock(fs, bno, size);
209 0c98da8b 2005-07-13 devnull 	}
210 0c98da8b 2005-07-13 devnull 	bno -= ppb*ppb;
211 0c98da8b 2005-07-13 devnull 
212 0c98da8b 2005-07-13 devnull 	/* one triple indirect */
213 0c98da8b 2005-07-13 devnull 	if(bno < ppb*ppb*ppb){
214 0c98da8b 2005-07-13 devnull 		b = ext2datablock(fs, ino->block[TINDBLOCK], fs->blocksize);
215 0c98da8b 2005-07-13 devnull 		if(b == nil)
216 0c98da8b 2005-07-13 devnull 			return nil;
217 0c98da8b 2005-07-13 devnull 		a = (u32int*)b->data;
218 0c98da8b 2005-07-13 devnull 		bno = a[(bno/(ppb*ppb))%ppb];
219 0c98da8b 2005-07-13 devnull 		blockput(b);
220 0c98da8b 2005-07-13 devnull 		b = ext2datablock(fs, bno, fs->blocksize);
221 0c98da8b 2005-07-13 devnull 		if(b == nil)
222 0c98da8b 2005-07-13 devnull 			return nil;
223 0c98da8b 2005-07-13 devnull 		a = (u32int*)b->data;
224 0c98da8b 2005-07-13 devnull 		bno = a[(bno/ppb)%ppb];
225 0c98da8b 2005-07-13 devnull 		blockput(b);
226 0c98da8b 2005-07-13 devnull 		b = ext2datablock(fs, bno, fs->blocksize);
227 0c98da8b 2005-07-13 devnull 		if(b == nil)
228 0c98da8b 2005-07-13 devnull 			return nil;
229 0c98da8b 2005-07-13 devnull 		a = (u32int*)b->data;
230 0c98da8b 2005-07-13 devnull 		bno = a[bno%ppb];
231 0c98da8b 2005-07-13 devnull 		blockput(b);
232 0c98da8b 2005-07-13 devnull 		return ext2datablock(fs, bno, size);
233 0c98da8b 2005-07-13 devnull 	}
234 0c98da8b 2005-07-13 devnull 
235 3330e5bf 2005-10-29 devnull 	fprint(2, "ext2fileblock %ud: too big\n", obno);
236 0c98da8b 2005-07-13 devnull 	return nil;
237 0c98da8b 2005-07-13 devnull }
238 0c98da8b 2005-07-13 devnull 
239 0c98da8b 2005-07-13 devnull static int
240 0c98da8b 2005-07-13 devnull checksuper(Super *super)
241 0c98da8b 2005-07-13 devnull {
242 0c98da8b 2005-07-13 devnull 	if(super->magic != SUPERMAGIC){
243 0c98da8b 2005-07-13 devnull 		werrstr("bad magic 0x%ux wanted 0x%ux", super->magic, SUPERMAGIC);
244 0c98da8b 2005-07-13 devnull 		return -1;
245 0c98da8b 2005-07-13 devnull 	}
246 0c98da8b 2005-07-13 devnull 	return 0;
247 0c98da8b 2005-07-13 devnull }
248 0c98da8b 2005-07-13 devnull 
249 0c98da8b 2005-07-13 devnull static int
250 0c98da8b 2005-07-13 devnull ext2sync(Fsys *fsys)
251 0c98da8b 2005-07-13 devnull {
252 0c98da8b 2005-07-13 devnull 	int i;
253 0c98da8b 2005-07-13 devnull 	Group *g;
254 0c98da8b 2005-07-13 devnull 	Block *b;
255 0c98da8b 2005-07-13 devnull 	Super *super;
256 0c98da8b 2005-07-13 devnull 	Ext2 *fs;
257 0c98da8b 2005-07-13 devnull 	Disk *disk;
258 0c98da8b 2005-07-13 devnull 
259 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
260 0c98da8b 2005-07-13 devnull 	disk = fs->disk;
261 0c98da8b 2005-07-13 devnull 	if((b = diskread(disk, SBSIZE, SBOFF)) == nil)
262 0c98da8b 2005-07-13 devnull 		goto error;
263 0c98da8b 2005-07-13 devnull 	super = (Super*)b->data;
264 0c98da8b 2005-07-13 devnull 	if(checksuper(super) < 0)
265 0c98da8b 2005-07-13 devnull 		goto error;
266 0c98da8b 2005-07-13 devnull 	fs->blocksize = MINBLOCKSIZE<<super->logblocksize;
267 0c98da8b 2005-07-13 devnull 	fs->nblock = super->nblock;
268 0c98da8b 2005-07-13 devnull 	fs->ngroup = (super->nblock+super->blockspergroup-1)
269 0c98da8b 2005-07-13 devnull 		/ super->blockspergroup;
270 0c98da8b 2005-07-13 devnull 	fs->inospergroup = super->inospergroup;
271 0c98da8b 2005-07-13 devnull 	fs->blockspergroup = super->blockspergroup;
272 0c98da8b 2005-07-13 devnull 	fs->inosperblock = fs->blocksize / InodeSize;
273 0c98da8b 2005-07-13 devnull 	if(fs->blocksize == SBOFF)
274 0c98da8b 2005-07-13 devnull 		fs->groupaddr = 2;
275 0c98da8b 2005-07-13 devnull 	else
276 0c98da8b 2005-07-13 devnull 		fs->groupaddr = 1;
277 0c98da8b 2005-07-13 devnull 	fs->descperblock = fs->blocksize / GroupSize;
278 0c98da8b 2005-07-13 devnull 	fs->firstblock = super->firstdatablock;
279 0c98da8b 2005-07-13 devnull 	blockput(b);
280 0c98da8b 2005-07-13 devnull 
281 0c98da8b 2005-07-13 devnull 	fsys->blocksize = fs->blocksize;
282 0c98da8b 2005-07-13 devnull 	fsys->nblock = fs->nblock;
283 0c98da8b 2005-07-13 devnull 	fprint(2, "ext2 %d %d-byte blocks, first data block %d, %d groups of %d\n",
284 0c98da8b 2005-07-13 devnull 		fs->nblock, fs->blocksize, fs->firstblock, fs->ngroup, fs->blockspergroup);
285 0c98da8b 2005-07-13 devnull 
286 0c98da8b 2005-07-13 devnull 	if(0){
287 0c98da8b 2005-07-13 devnull 		for(i=0; i<fs->ngroup; i++)
288 0c98da8b 2005-07-13 devnull 			if((g = ext2group(fs, i, &b)) != nil){
289 0c98da8b 2005-07-13 devnull 				fprint(2, "grp %d: bitblock=%d\n", i, g->bitblock);
290 0c98da8b 2005-07-13 devnull 				blockput(b);
291 0c98da8b 2005-07-13 devnull 			}
292 0c98da8b 2005-07-13 devnull 	}
293 0c98da8b 2005-07-13 devnull 	return 0;
294 0c98da8b 2005-07-13 devnull 
295 0c98da8b 2005-07-13 devnull error:
296 0c98da8b 2005-07-13 devnull 	blockput(b);
297 0c98da8b 2005-07-13 devnull 	return -1;
298 0c98da8b 2005-07-13 devnull }
299 0c98da8b 2005-07-13 devnull 
300 0c98da8b 2005-07-13 devnull static void
301 0c98da8b 2005-07-13 devnull mkhandle(Nfs3Handle *h, u64int ino)
302 0c98da8b 2005-07-13 devnull {
303 0c98da8b 2005-07-13 devnull 	h->h[0] = ino>>24;
304 0c98da8b 2005-07-13 devnull 	h->h[1] = ino>>16;
305 0c98da8b 2005-07-13 devnull 	h->h[2] = ino>>8;
306 0c98da8b 2005-07-13 devnull 	h->h[3] = ino;
307 0c98da8b 2005-07-13 devnull 	h->len = 4;
308 0c98da8b 2005-07-13 devnull }
309 0c98da8b 2005-07-13 devnull 
310 0c98da8b 2005-07-13 devnull static u32int
311 0c98da8b 2005-07-13 devnull byte2u32(uchar *p)
312 0c98da8b 2005-07-13 devnull {
313 0c98da8b 2005-07-13 devnull 	return (p[0]<<24) | (p[1]<<16) | (p[2]<<8) | p[3];
314 0c98da8b 2005-07-13 devnull }
315 0c98da8b 2005-07-13 devnull 
316 0c98da8b 2005-07-13 devnull static Nfs3Status
317 0c98da8b 2005-07-13 devnull handle2ino(Ext2 *fs, Nfs3Handle *h, u32int *pinum, Inode *ino)
318 0c98da8b 2005-07-13 devnull {
319 0c98da8b 2005-07-13 devnull 	int i;
320 0c98da8b 2005-07-13 devnull 	uint ioff;
321 0c98da8b 2005-07-13 devnull 	u32int inum;
322 0c98da8b 2005-07-13 devnull 	u32int addr;
323 0c98da8b 2005-07-13 devnull 	Block *gb, *b;
324 0c98da8b 2005-07-13 devnull 	Group *g;
325 0c98da8b 2005-07-13 devnull 
326 0c98da8b 2005-07-13 devnull 	if(h->len != 4)
327 0c98da8b 2005-07-13 devnull 		return Nfs3ErrBadHandle;
328 0c98da8b 2005-07-13 devnull 	inum = byte2u32(h->h);
329 0c98da8b 2005-07-13 devnull 	if(pinum)
330 0c98da8b 2005-07-13 devnull 		*pinum = inum;
331 0c98da8b 2005-07-13 devnull 	i = (inum-1) / fs->inospergroup;
332 0c98da8b 2005-07-13 devnull 	if(i >= fs->ngroup)
333 0c98da8b 2005-07-13 devnull 		return Nfs3ErrBadHandle;
334 0c98da8b 2005-07-13 devnull 	ioff = (inum-1) % fs->inospergroup;
335 0c98da8b 2005-07-13 devnull 	if((g = ext2group(fs, i, &gb)) == nil)
336 0c98da8b 2005-07-13 devnull 		return Nfs3ErrIo;
337 0c98da8b 2005-07-13 devnull 	addr = g->inodeaddr + ioff/fs->inosperblock;
338 0c98da8b 2005-07-13 devnull 	blockput(gb);
339 0c98da8b 2005-07-13 devnull 	if((b = diskread(fs->disk, fs->blocksize, (u64int)addr*fs->blocksize)) == nil)
340 0c98da8b 2005-07-13 devnull 		return Nfs3ErrIo;
341 0c98da8b 2005-07-13 devnull 	*ino = ((Inode*)b->data)[ioff%fs->inosperblock];
342 0c98da8b 2005-07-13 devnull 	blockput(b);
343 0c98da8b 2005-07-13 devnull 	return Nfs3Ok;
344 0c98da8b 2005-07-13 devnull }
345 0c98da8b 2005-07-13 devnull 
346 0c98da8b 2005-07-13 devnull static Nfs3Status
347 0c98da8b 2005-07-13 devnull ext2root(Fsys *fsys, Nfs3Handle *h)
348 0c98da8b 2005-07-13 devnull {
349 3330e5bf 2005-10-29 devnull 	USED(fsys);
350 0c98da8b 2005-07-13 devnull 	mkhandle(h, ROOTINODE);
351 0c98da8b 2005-07-13 devnull 	return Nfs3Ok;
352 0c98da8b 2005-07-13 devnull }
353 0c98da8b 2005-07-13 devnull 
354 0c98da8b 2005-07-13 devnull static Nfs3Status
355 0c98da8b 2005-07-13 devnull ino2attr(Ext2 *fs, Inode *ino, u32int inum, Nfs3Attr *attr)
356 0c98da8b 2005-07-13 devnull {
357 0c98da8b 2005-07-13 devnull 	u32int rdev;
358 0c98da8b 2005-07-13 devnull 
359 0c98da8b 2005-07-13 devnull 	attr->type = -1;
360 0c98da8b 2005-07-13 devnull 	switch(ino->mode&IFMT){
361 0c98da8b 2005-07-13 devnull 	case IFIFO:
362 0c98da8b 2005-07-13 devnull 		attr->type = Nfs3FileFifo;
363 0c98da8b 2005-07-13 devnull 		break;
364 0c98da8b 2005-07-13 devnull 	case IFCHR:
365 0c98da8b 2005-07-13 devnull 		attr->type = Nfs3FileChar;
366 0c98da8b 2005-07-13 devnull 		break;
367 0c98da8b 2005-07-13 devnull 	case IFDIR:
368 0c98da8b 2005-07-13 devnull 		attr->type = Nfs3FileDir;
369 0c98da8b 2005-07-13 devnull 		break;
370 0c98da8b 2005-07-13 devnull 	case IFBLK:
371 0c98da8b 2005-07-13 devnull 		attr->type = Nfs3FileBlock;
372 0c98da8b 2005-07-13 devnull 		break;
373 0c98da8b 2005-07-13 devnull 	case IFREG:
374 0c98da8b 2005-07-13 devnull 		attr->type = Nfs3FileReg;
375 0c98da8b 2005-07-13 devnull 		break;
376 0c98da8b 2005-07-13 devnull 	case IFLNK:
377 0c98da8b 2005-07-13 devnull 		attr->type = Nfs3FileSymlink;
378 0c98da8b 2005-07-13 devnull 		break;
379 0c98da8b 2005-07-13 devnull 	case IFSOCK:
380 0c98da8b 2005-07-13 devnull 		attr->type = Nfs3FileSocket;
381 0c98da8b 2005-07-13 devnull 		break;
382 0c98da8b 2005-07-13 devnull 	case IFWHT:
383 0c98da8b 2005-07-13 devnull 	default:
384 0c98da8b 2005-07-13 devnull 		return Nfs3ErrBadHandle;
385 0c98da8b 2005-07-13 devnull 	}
386 0c98da8b 2005-07-13 devnull 
387 0c98da8b 2005-07-13 devnull 	attr->mode = ino->mode&07777;
388 0c98da8b 2005-07-13 devnull 	attr->nlink = ino->nlink;
389 0c98da8b 2005-07-13 devnull 	attr->uid = ino->uid;
390 0c98da8b 2005-07-13 devnull 	attr->gid = ino->gid;
391 0c98da8b 2005-07-13 devnull 	attr->size = ino->size;
392 0c98da8b 2005-07-13 devnull 	attr->used = ino->nblock*fs->blocksize;
393 0c98da8b 2005-07-13 devnull 	if(attr->type==Nfs3FileBlock || attr->type==Nfs3FileChar){
394 0c98da8b 2005-07-13 devnull 		rdev = ino->block[0];
395 0c98da8b 2005-07-13 devnull 		attr->major = (rdev>>8)&0xFF;
396 0c98da8b 2005-07-13 devnull 		attr->minor = rdev & 0xFFFF00FF;
397 0c98da8b 2005-07-13 devnull 	}else{
398 0c98da8b 2005-07-13 devnull 		attr->major = 0;
399 0c98da8b 2005-07-13 devnull 		attr->minor = 0;
400 0c98da8b 2005-07-13 devnull 	}
401 0c98da8b 2005-07-13 devnull 	attr->fsid = 0;
402 0c98da8b 2005-07-13 devnull 	attr->fileid = inum;
403 0c98da8b 2005-07-13 devnull 	attr->atime.sec = ino->atime;
404 0c98da8b 2005-07-13 devnull 	attr->atime.nsec = 0;
405 0c98da8b 2005-07-13 devnull 	attr->mtime.sec = ino->mtime;
406 0c98da8b 2005-07-13 devnull 	attr->mtime.nsec = 0;
407 0c98da8b 2005-07-13 devnull 	attr->ctime.sec = ino->ctime;
408 0c98da8b 2005-07-13 devnull 	attr->ctime.nsec = 0;
409 0c98da8b 2005-07-13 devnull 	return Nfs3Ok;
410 0c98da8b 2005-07-13 devnull }
411 0c98da8b 2005-07-13 devnull 
412 0c98da8b 2005-07-13 devnull static int
413 0c98da8b 2005-07-13 devnull ingroup(SunAuthUnix *au, uint gid)
414 0c98da8b 2005-07-13 devnull {
415 0c98da8b 2005-07-13 devnull 	int i;
416 0c98da8b 2005-07-13 devnull 
417 0c98da8b 2005-07-13 devnull 	for(i=0; i<au->ng; i++)
418 0c98da8b 2005-07-13 devnull 		if(au->g[i] == gid)
419 0c98da8b 2005-07-13 devnull 			return 1;
420 0c98da8b 2005-07-13 devnull 	return 0;
421 0c98da8b 2005-07-13 devnull }
422 0c98da8b 2005-07-13 devnull 
423 0c98da8b 2005-07-13 devnull static Nfs3Status
424 0c98da8b 2005-07-13 devnull inoperm(Inode *ino, SunAuthUnix *au, int need)
425 0c98da8b 2005-07-13 devnull {
426 0c98da8b 2005-07-13 devnull 	int have;
427 0c98da8b 2005-07-13 devnull 
428 0c98da8b 2005-07-13 devnull 	if(allowall)
429 0c98da8b 2005-07-13 devnull 		return Nfs3Ok;
430 0c98da8b 2005-07-13 devnull 
431 0c98da8b 2005-07-13 devnull 	have = ino->mode&0777;
432 0c98da8b 2005-07-13 devnull 	if(ino->uid == au->uid)
433 0c98da8b 2005-07-13 devnull 		have >>= 6;
434 0c98da8b 2005-07-13 devnull 	else if(ino->gid == au->gid || ingroup(au, ino->gid))
435 0c98da8b 2005-07-13 devnull 		have >>= 3;
436 0c98da8b 2005-07-13 devnull 
437 0c98da8b 2005-07-13 devnull 	if((have&need) != need)
438 0c98da8b 2005-07-13 devnull 		return Nfs3ErrNotOwner;	/* really EPERM */
439 0c98da8b 2005-07-13 devnull 	return Nfs3Ok;
440 0c98da8b 2005-07-13 devnull }
441 0c98da8b 2005-07-13 devnull 
442 0c98da8b 2005-07-13 devnull static Nfs3Status
443 0c98da8b 2005-07-13 devnull ext2getattr(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, Nfs3Attr *attr)
444 0c98da8b 2005-07-13 devnull {
445 0c98da8b 2005-07-13 devnull 	Inode ino;
446 0c98da8b 2005-07-13 devnull 	u32int inum;
447 0c98da8b 2005-07-13 devnull 	Ext2 *fs;
448 0c98da8b 2005-07-13 devnull 	Nfs3Status ok;
449 0c98da8b 2005-07-13 devnull 
450 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
451 0c98da8b 2005-07-13 devnull 	if((ok = handle2ino(fs, h, &inum, &ino)) != Nfs3Ok)
452 0c98da8b 2005-07-13 devnull 		return ok;
453 0c98da8b 2005-07-13 devnull 
454 0c98da8b 2005-07-13 devnull 	USED(au);	/* anyone can getattr */
455 0c98da8b 2005-07-13 devnull 	return ino2attr(fs, &ino, inum, attr);
456 0c98da8b 2005-07-13 devnull }
457 0c98da8b 2005-07-13 devnull 
458 0c98da8b 2005-07-13 devnull static Nfs3Status
459 0c98da8b 2005-07-13 devnull ext2access(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int want, u32int *got, Nfs3Attr *attr)
460 0c98da8b 2005-07-13 devnull {
461 0c98da8b 2005-07-13 devnull 	int have;
462 0c98da8b 2005-07-13 devnull 	Inode ino;
463 0c98da8b 2005-07-13 devnull 	u32int inum;
464 0c98da8b 2005-07-13 devnull 	Ext2 *fs;
465 0c98da8b 2005-07-13 devnull 	Nfs3Status ok;
466 0c98da8b 2005-07-13 devnull 
467 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
468 0c98da8b 2005-07-13 devnull 	if((ok = handle2ino(fs, h, &inum, &ino)) != Nfs3Ok)
469 0c98da8b 2005-07-13 devnull 		return ok;
470 0c98da8b 2005-07-13 devnull 
471 0c98da8b 2005-07-13 devnull 	have = ino.mode&0777;
472 0c98da8b 2005-07-13 devnull 	if(ino.uid == au->uid)
473 0c98da8b 2005-07-13 devnull 		have >>= 6;
474 0c98da8b 2005-07-13 devnull 	else if(ino.gid == au->gid || ingroup(au, ino.gid))
475 0c98da8b 2005-07-13 devnull 		have >>= 3;
476 0c98da8b 2005-07-13 devnull 
477 0c98da8b 2005-07-13 devnull 	*got = 0;
478 0c98da8b 2005-07-13 devnull 	if((want&Nfs3AccessRead) && (have&AREAD))
479 0c98da8b 2005-07-13 devnull 		*got |= Nfs3AccessRead;
480 0c98da8b 2005-07-13 devnull 	if((want&Nfs3AccessLookup) && (ino.mode&IFMT)==IFDIR && (have&AEXEC))
481 0c98da8b 2005-07-13 devnull 		*got |= Nfs3AccessLookup;
482 0c98da8b 2005-07-13 devnull 	if((want&Nfs3AccessExecute) && (ino.mode&IFMT)!=IFDIR && (have&AEXEC))
483 0c98da8b 2005-07-13 devnull 		*got |= Nfs3AccessExecute;
484 0c98da8b 2005-07-13 devnull 
485 0c98da8b 2005-07-13 devnull 	return ino2attr(fs, &ino, inum, attr);
486 0c98da8b 2005-07-13 devnull }
487 0c98da8b 2005-07-13 devnull 
488 0c98da8b 2005-07-13 devnull static Nfs3Status
489 0c98da8b 2005-07-13 devnull ext2lookup(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, char *name, Nfs3Handle *nh)
490 0c98da8b 2005-07-13 devnull {
491 0c98da8b 2005-07-13 devnull 	u32int nblock;
492 0c98da8b 2005-07-13 devnull 	u32int i;
493 0c98da8b 2005-07-13 devnull 	uchar *p, *ep;
494 0c98da8b 2005-07-13 devnull 	Dirent *de;
495 0c98da8b 2005-07-13 devnull 	Inode ino;
496 0c98da8b 2005-07-13 devnull 	Block *b;
497 0c98da8b 2005-07-13 devnull 	Ext2 *fs;
498 0c98da8b 2005-07-13 devnull 	Nfs3Status ok;
499 0c98da8b 2005-07-13 devnull 	int len, want;
500 0c98da8b 2005-07-13 devnull 
501 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
502 0c98da8b 2005-07-13 devnull 	if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok)
503 0c98da8b 2005-07-13 devnull 		return ok;
504 0c98da8b 2005-07-13 devnull 
505 0c98da8b 2005-07-13 devnull 	if((ino.mode&IFMT) != IFDIR)
506 0c98da8b 2005-07-13 devnull 		return Nfs3ErrNotDir;
507 0c98da8b 2005-07-13 devnull 
508 0c98da8b 2005-07-13 devnull 	if((ok = inoperm(&ino, au, AEXEC)) != Nfs3Ok)
509 0c98da8b 2005-07-13 devnull 		return ok;
510 0c98da8b 2005-07-13 devnull 
511 0c98da8b 2005-07-13 devnull 	len = strlen(name);
512 0c98da8b 2005-07-13 devnull 	nblock = (ino.size+fs->blocksize-1) / fs->blocksize;
513 0c98da8b 2005-07-13 devnull 	if(debug) fprint(2, "%d blocks in dir...", nblock);
514 0c98da8b 2005-07-13 devnull 	for(i=0; i<nblock; i++){
515 0c98da8b 2005-07-13 devnull 		if(i==nblock-1)
516 0c98da8b 2005-07-13 devnull 			want = ino.size % fs->blocksize;
517 0c98da8b 2005-07-13 devnull 		else
518 0c98da8b 2005-07-13 devnull 			want = fs->blocksize;
519 0c98da8b 2005-07-13 devnull 		b = ext2fileblock(fs, &ino, i, want);
520 0c98da8b 2005-07-13 devnull 		if(b == nil){
521 0c98da8b 2005-07-13 devnull 			if(debug) fprint(2, "empty block...");
522 0c98da8b 2005-07-13 devnull 			continue;
523 0c98da8b 2005-07-13 devnull 		}
524 0c98da8b 2005-07-13 devnull 		p = b->data;
525 0c98da8b 2005-07-13 devnull 		ep = p+b->len;
526 0c98da8b 2005-07-13 devnull 		while(p < ep){
527 0c98da8b 2005-07-13 devnull 			de = (Dirent*)p;
528 0c98da8b 2005-07-13 devnull 			if(de->reclen == 0){
529 0c98da8b 2005-07-13 devnull 				if(debug)
530 0c98da8b 2005-07-13 devnull 					fprint(2, "reclen 0 at offset %d of %d\n", (int)(p-b->data), b->len);
531 0c98da8b 2005-07-13 devnull 				break;
532 0c98da8b 2005-07-13 devnull 			}
533 0c98da8b 2005-07-13 devnull 			p += de->reclen;
534 0c98da8b 2005-07-13 devnull 			if(p > ep){
535 0c98da8b 2005-07-13 devnull 				if(debug)
536 0c98da8b 2005-07-13 devnull 					fprint(2, "bad len %d at offset %d of %d\n", de->reclen, (int)(p-b->data), b->len);
537 0c98da8b 2005-07-13 devnull 				break;
538 0c98da8b 2005-07-13 devnull 			}
539 0c98da8b 2005-07-13 devnull 			if(de->ino == 0)
540 0c98da8b 2005-07-13 devnull 				continue;
541 0c98da8b 2005-07-13 devnull 			if(4+2+2+de->namlen > de->reclen){
542 0c98da8b 2005-07-13 devnull 				if(debug)
543 0c98da8b 2005-07-13 devnull 					fprint(2, "bad namelen %d at offset %d of %d\n", de->namlen, (int)(p-b->data), b->len);
544 0c98da8b 2005-07-13 devnull 				break;
545 0c98da8b 2005-07-13 devnull 			}
546 0c98da8b 2005-07-13 devnull 			if(de->namlen == len && memcmp(de->name, name, len) == 0){
547 0c98da8b 2005-07-13 devnull 				mkhandle(nh, de->ino);
548 0c98da8b 2005-07-13 devnull 				blockput(b);
549 0c98da8b 2005-07-13 devnull 				return Nfs3Ok;
550 0c98da8b 2005-07-13 devnull 			}
551 0c98da8b 2005-07-13 devnull 		}
552 0c98da8b 2005-07-13 devnull 		blockput(b);
553 0c98da8b 2005-07-13 devnull 	}
554 0c98da8b 2005-07-13 devnull 	return Nfs3ErrNoEnt;
555 0c98da8b 2005-07-13 devnull }
556 0c98da8b 2005-07-13 devnull 
557 0c98da8b 2005-07-13 devnull static Nfs3Status
558 0c98da8b 2005-07-13 devnull ext2readdir(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int count, u64int cookie, uchar **pdata, u32int *pcount, u1int *peof)
559 0c98da8b 2005-07-13 devnull {
560 0c98da8b 2005-07-13 devnull 	u32int nblock;
561 0c98da8b 2005-07-13 devnull 	u32int i;
562 0c98da8b 2005-07-13 devnull 	int off, done;
563 0c98da8b 2005-07-13 devnull 	uchar *data, *dp, *dep, *p, *ep, *ndp;
564 0c98da8b 2005-07-13 devnull 	Dirent *de;
565 0c98da8b 2005-07-13 devnull 	Inode ino;
566 0c98da8b 2005-07-13 devnull 	Block *b;
567 0c98da8b 2005-07-13 devnull 	Ext2 *fs;
568 0c98da8b 2005-07-13 devnull 	Nfs3Status ok;
569 0c98da8b 2005-07-13 devnull 	Nfs3Entry e;
570 0c98da8b 2005-07-13 devnull 	int want;
571 0c98da8b 2005-07-13 devnull 
572 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
573 0c98da8b 2005-07-13 devnull 	if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok)
574 0c98da8b 2005-07-13 devnull 		return ok;
575 0c98da8b 2005-07-13 devnull 
576 0c98da8b 2005-07-13 devnull 	if((ino.mode&IFMT) != IFDIR)
577 0c98da8b 2005-07-13 devnull 		return Nfs3ErrNotDir;
578 0c98da8b 2005-07-13 devnull 
579 0c98da8b 2005-07-13 devnull 	if((ok = inoperm(&ino, au, AREAD)) != Nfs3Ok)
580 0c98da8b 2005-07-13 devnull 		return ok;
581 0c98da8b 2005-07-13 devnull 
582 0c98da8b 2005-07-13 devnull 	if(cookie >= ino.size){
583 0c98da8b 2005-07-13 devnull 		*pcount = 0;
584 0c98da8b 2005-07-13 devnull 		*pdata = 0;
585 0c98da8b 2005-07-13 devnull 		return Nfs3Ok;
586 0c98da8b 2005-07-13 devnull 	}
587 0c98da8b 2005-07-13 devnull 
588 0c98da8b 2005-07-13 devnull 	dp = malloc(count);
589 0c98da8b 2005-07-13 devnull 	data = dp;
590 0c98da8b 2005-07-13 devnull 	if(dp == nil)
591 0c98da8b 2005-07-13 devnull 		return Nfs3ErrNoMem;
592 0c98da8b 2005-07-13 devnull 	dep = dp+count;
593 0c98da8b 2005-07-13 devnull 	*peof = 0;
594 0c98da8b 2005-07-13 devnull 	nblock = (ino.size+fs->blocksize-1) / fs->blocksize;
595 0c98da8b 2005-07-13 devnull 	i = cookie/fs->blocksize;
596 0c98da8b 2005-07-13 devnull 	off = cookie%fs->blocksize;
597 0c98da8b 2005-07-13 devnull 	done = 0;
598 0c98da8b 2005-07-13 devnull 	for(; i<nblock && !done; i++){
599 0c98da8b 2005-07-13 devnull 		if(i==nblock-1)
600 0c98da8b 2005-07-13 devnull 			want = ino.size % fs->blocksize;
601 0c98da8b 2005-07-13 devnull 		else
602 0c98da8b 2005-07-13 devnull 			want = fs->blocksize;
603 0c98da8b 2005-07-13 devnull 		b = ext2fileblock(fs, &ino, i, want);
604 0c98da8b 2005-07-13 devnull 		if(b == nil)
605 0c98da8b 2005-07-13 devnull 			continue;
606 0c98da8b 2005-07-13 devnull 		p = b->data;
607 0c98da8b 2005-07-13 devnull 		ep = p+b->len;
608 0c98da8b 2005-07-13 devnull 		memset(&e, 0, sizeof e);
609 0c98da8b 2005-07-13 devnull 		while(p < ep){
610 0c98da8b 2005-07-13 devnull 			de = (Dirent*)p;
611 0c98da8b 2005-07-13 devnull 			if(de->reclen == 0){
612 0c98da8b 2005-07-13 devnull 				if(debug) fprint(2, "reclen 0 at offset %d of %d\n", (int)(p-b->data), b->len);
613 0c98da8b 2005-07-13 devnull 				break;
614 0c98da8b 2005-07-13 devnull 			}
615 0c98da8b 2005-07-13 devnull 			p += de->reclen;
616 0c98da8b 2005-07-13 devnull 			if(p > ep){
617 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);
618 0c98da8b 2005-07-13 devnull 				break;
619 0c98da8b 2005-07-13 devnull 			}
620 0c98da8b 2005-07-13 devnull 			if(de->ino == 0){
621 0c98da8b 2005-07-13 devnull 				if(debug) fprint(2, "zero inode\n");
622 0c98da8b 2005-07-13 devnull 				continue;
623 0c98da8b 2005-07-13 devnull 			}
624 0c98da8b 2005-07-13 devnull 			if(4+2+2+de->namlen > de->reclen){
625 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);
626 0c98da8b 2005-07-13 devnull 				break;
627 0c98da8b 2005-07-13 devnull 			}
628 e77222a4 2006-05-04 devnull 			if(debug) print("%.*s/%d ", de->namlen, de->name, (int)de->ino);
629 0c98da8b 2005-07-13 devnull 			if((uchar*)de - b->data < off)
630 0c98da8b 2005-07-13 devnull 				continue;
631 0c98da8b 2005-07-13 devnull 			e.fileid = de->ino;
632 0c98da8b 2005-07-13 devnull 			e.name = de->name;
633 e77222a4 2006-05-04 devnull 			e.namelen = de->namlen;
634 0c98da8b 2005-07-13 devnull 			e.cookie = (u64int)i*fs->blocksize + (p - b->data);
635 0c98da8b 2005-07-13 devnull 			if(nfs3entrypack(dp, dep, &ndp, &e) < 0){
636 0c98da8b 2005-07-13 devnull 				done = 1;
637 0c98da8b 2005-07-13 devnull 				break;
638 0c98da8b 2005-07-13 devnull 			}
639 0c98da8b 2005-07-13 devnull 			dp = ndp;
640 0c98da8b 2005-07-13 devnull 		}
641 0c98da8b 2005-07-13 devnull 		off = 0;
642 0c98da8b 2005-07-13 devnull 		blockput(b);
643 0c98da8b 2005-07-13 devnull 	}
644 0c98da8b 2005-07-13 devnull 	if(i==nblock)
645 0c98da8b 2005-07-13 devnull 		*peof = 1;
646 0c98da8b 2005-07-13 devnull 
647 0c98da8b 2005-07-13 devnull 	*pcount = dp - data;
648 0c98da8b 2005-07-13 devnull 	*pdata = data;
649 0c98da8b 2005-07-13 devnull 	return Nfs3Ok;
650 0c98da8b 2005-07-13 devnull }
651 0c98da8b 2005-07-13 devnull 
652 0c98da8b 2005-07-13 devnull static Nfs3Status
653 0c98da8b 2005-07-13 devnull ext2readfile(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int count,
654 0c98da8b 2005-07-13 devnull 	u64int offset, uchar **pdata, u32int *pcount, u1int *peof)
655 0c98da8b 2005-07-13 devnull {
656 0c98da8b 2005-07-13 devnull 	uchar *data;
657 0c98da8b 2005-07-13 devnull 	Block *b;
658 0c98da8b 2005-07-13 devnull 	Ext2 *fs;
659 fa5af687 2006-06-15 devnull 	int skip1, tot, want, fragcount;
660 0c98da8b 2005-07-13 devnull 	Inode ino;
661 0c98da8b 2005-07-13 devnull 	Nfs3Status ok;
662 0c98da8b 2005-07-13 devnull 
663 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
664 0c98da8b 2005-07-13 devnull 	if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok)
665 0c98da8b 2005-07-13 devnull 		return ok;
666 0c98da8b 2005-07-13 devnull 
667 0c98da8b 2005-07-13 devnull 	if((ok = inoperm(&ino, au, AREAD)) != Nfs3Ok)
668 0c98da8b 2005-07-13 devnull 		return ok;
669 0c98da8b 2005-07-13 devnull 
670 0c98da8b 2005-07-13 devnull 	if(offset >= ino.size){
671 0c98da8b 2005-07-13 devnull 		*pdata = 0;
672 0c98da8b 2005-07-13 devnull 		*pcount = 0;
673 0c98da8b 2005-07-13 devnull 		*peof = 1;
674 0c98da8b 2005-07-13 devnull 		return Nfs3Ok;
675 0c98da8b 2005-07-13 devnull 	}
676 0c98da8b 2005-07-13 devnull 	if(offset+count > ino.size)
677 0c98da8b 2005-07-13 devnull 		count = ino.size-offset;
678 0c98da8b 2005-07-13 devnull 
679 0c98da8b 2005-07-13 devnull 	data = malloc(count);
680 0c98da8b 2005-07-13 devnull 	if(data == nil)
681 0c98da8b 2005-07-13 devnull 		return Nfs3ErrNoMem;
682 fa5af687 2006-06-15 devnull 	memset(data, 0, count);
683 0c98da8b 2005-07-13 devnull 
684 fa5af687 2006-06-15 devnull 	skip1 = offset%fs->blocksize;
685 fa5af687 2006-06-15 devnull 	offset -= skip1;
686 fa5af687 2006-06-15 devnull 	want = skip1+count;
687 0c98da8b 2005-07-13 devnull 
688 fa5af687 2006-06-15 devnull 	/*
689 fa5af687 2006-06-15 devnull 	 * have to read multiple blocks if we get asked for a big read.
690 fa5af687 2006-06-15 devnull 	 * Linux NFS client assumes that if you ask for 8k and only get 4k
691 fa5af687 2006-06-15 devnull 	 * back, the remaining 4k is zeros.
692 fa5af687 2006-06-15 devnull 	 */
693 fa5af687 2006-06-15 devnull 	for(tot=0; tot<want; tot+=fragcount){
694 fa5af687 2006-06-15 devnull 		b = ext2fileblock(fs, &ino, (offset+tot)/fs->blocksize, fs->blocksize);
695 fa5af687 2006-06-15 devnull 		fragcount = fs->blocksize;
696 fa5af687 2006-06-15 devnull 		if(b == nil)
697 fa5af687 2006-06-15 devnull 			continue;
698 fa5af687 2006-06-15 devnull 		if(tot+fragcount > want)
699 fa5af687 2006-06-15 devnull 			fragcount = want - tot;
700 fa5af687 2006-06-15 devnull 		if(tot == 0)
701 fa5af687 2006-06-15 devnull 			memmove(data, b->data+skip1, fragcount-skip1);
702 fa5af687 2006-06-15 devnull 		else
703 fa5af687 2006-06-15 devnull 			memmove(data+tot-skip1, b->data, fragcount);
704 0c98da8b 2005-07-13 devnull 		blockput(b);
705 0c98da8b 2005-07-13 devnull 	}
706 fa5af687 2006-06-15 devnull 	count = tot - skip1;
707 fa5af687 2006-06-15 devnull 
708 0c98da8b 2005-07-13 devnull 	*peof = (offset+count == ino.size);
709 0c98da8b 2005-07-13 devnull 	*pcount = count;
710 0c98da8b 2005-07-13 devnull 	*pdata = data;
711 0c98da8b 2005-07-13 devnull 	return Nfs3Ok;
712 0c98da8b 2005-07-13 devnull }
713 0c98da8b 2005-07-13 devnull 
714 0c98da8b 2005-07-13 devnull static Nfs3Status
715 0c98da8b 2005-07-13 devnull ext2readlink(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, char **link)
716 0c98da8b 2005-07-13 devnull {
717 0c98da8b 2005-07-13 devnull 	Ext2 *fs;
718 0c98da8b 2005-07-13 devnull 	Nfs3Status ok;
719 0c98da8b 2005-07-13 devnull 	int len;
720 0c98da8b 2005-07-13 devnull 	Inode ino;
721 0c98da8b 2005-07-13 devnull 	Block *b;
722 0c98da8b 2005-07-13 devnull 
723 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
724 0c98da8b 2005-07-13 devnull 	if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok)
725 0c98da8b 2005-07-13 devnull 		return ok;
726 0c98da8b 2005-07-13 devnull 	if((ok = inoperm(&ino, au, AREAD)) != Nfs3Ok)
727 0c98da8b 2005-07-13 devnull 		return ok;
728 0c98da8b 2005-07-13 devnull 
729 0c98da8b 2005-07-13 devnull 	if(ino.size > 1024)
730 0c98da8b 2005-07-13 devnull 		return Nfs3ErrIo;
731 0c98da8b 2005-07-13 devnull 	len = ino.size;
732 0c98da8b 2005-07-13 devnull 
733 0c98da8b 2005-07-13 devnull 	if(ino.nblock != 0){
734 0c98da8b 2005-07-13 devnull 		/* BUG: assumes symlink fits in one block */
735 0c98da8b 2005-07-13 devnull 		b = ext2fileblock(fs, &ino, 0, len);
736 0c98da8b 2005-07-13 devnull 		if(b == nil)
737 0c98da8b 2005-07-13 devnull 			return Nfs3ErrIo;
738 0c98da8b 2005-07-13 devnull 		if(memchr(b->data, 0, len) != nil){
739 0c98da8b 2005-07-13 devnull 			blockput(b);
740 0c98da8b 2005-07-13 devnull 			return Nfs3ErrIo;
741 0c98da8b 2005-07-13 devnull 		}
742 0c98da8b 2005-07-13 devnull 		*link = malloc(len+1);
743 0c98da8b 2005-07-13 devnull 		if(*link == 0){
744 0c98da8b 2005-07-13 devnull 			blockput(b);
745 0c98da8b 2005-07-13 devnull 			return Nfs3ErrNoMem;
746 0c98da8b 2005-07-13 devnull 		}
747 0c98da8b 2005-07-13 devnull 		memmove(*link, b->data, len);
748 0c98da8b 2005-07-13 devnull 		(*link)[len] = 0;
749 0c98da8b 2005-07-13 devnull 		blockput(b);
750 0c98da8b 2005-07-13 devnull 		return Nfs3Ok;
751 0c98da8b 2005-07-13 devnull 	}
752 0c98da8b 2005-07-13 devnull 
753 0c98da8b 2005-07-13 devnull 	if(len > sizeof ino.block)
754 0c98da8b 2005-07-13 devnull 		return Nfs3ErrIo;
755 0c98da8b 2005-07-13 devnull 
756 0c98da8b 2005-07-13 devnull 	*link = malloc(len+1);
757 0c98da8b 2005-07-13 devnull 	if(*link == 0)
758 0c98da8b 2005-07-13 devnull 		return Nfs3ErrNoMem;
759 0c98da8b 2005-07-13 devnull 	memmove(*link, ino.block, ino.size);
760 0c98da8b 2005-07-13 devnull 	(*link)[len] = 0;
761 0c98da8b 2005-07-13 devnull 	return Nfs3Ok;
762 0c98da8b 2005-07-13 devnull }
763 0c98da8b 2005-07-13 devnull