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 0c98da8b 2005-07-13 devnull 
 45 0c98da8b 2005-07-13 devnull 	if(ext2sync(fsys) < 0)
 46 0c98da8b 2005-07-13 devnull 		goto error;
 47 0c98da8b 2005-07-13 devnull 
 48 0c98da8b 2005-07-13 devnull 	return fsys;
 49 0c98da8b 2005-07-13 devnull 
 50 0c98da8b 2005-07-13 devnull error:
 51 0c98da8b 2005-07-13 devnull 	ext2close(fsys);
 52 0c98da8b 2005-07-13 devnull 	return nil;
 53 0c98da8b 2005-07-13 devnull }
 54 0c98da8b 2005-07-13 devnull 
 55 0c98da8b 2005-07-13 devnull static void
 56 0c98da8b 2005-07-13 devnull ext2close(Fsys *fsys)
 57 0c98da8b 2005-07-13 devnull {
 58 0c98da8b 2005-07-13 devnull 	Ext2 *fs;
 59 0c98da8b 2005-07-13 devnull 
 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);
 63 0c98da8b 2005-07-13 devnull }
 64 0c98da8b 2005-07-13 devnull 
 65 0c98da8b 2005-07-13 devnull static Group*
 66 0c98da8b 2005-07-13 devnull ext2group(Ext2 *fs, u32int i, Block **pb)
 67 0c98da8b 2005-07-13 devnull {
 68 0c98da8b 2005-07-13 devnull 	Block *b;
 69 0c98da8b 2005-07-13 devnull 	u64int addr;
 70 0c98da8b 2005-07-13 devnull 	Group *g;
 71 0c98da8b 2005-07-13 devnull 
 72 0c98da8b 2005-07-13 devnull 	if(i >= fs->ngroup)
 73 0c98da8b 2005-07-13 devnull 		return nil;
 74 0c98da8b 2005-07-13 devnull 
 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);
 80 0c98da8b 2005-07-13 devnull 	*pb = b;
 81 0c98da8b 2005-07-13 devnull 	return g;
 82 0c98da8b 2005-07-13 devnull }
 83 0c98da8b 2005-07-13 devnull 
 84 0c98da8b 2005-07-13 devnull static Block*
 85 0c98da8b 2005-07-13 devnull ext2blockread(Fsys *fsys, u64int vbno)
 86 0c98da8b 2005-07-13 devnull {
 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 c1a4592d 2006-06-15 devnull 	u32int bno, boff, bitblock;
 92 c1a4592d 2006-06-15 devnull 	u64int bitpos;
 93 0c98da8b 2005-07-13 devnull 	Ext2 *fs;
 94 0c98da8b 2005-07-13 devnull 
 95 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
 96 0c98da8b 2005-07-13 devnull 	if(vbno >= fs->nblock)
 97 0c98da8b 2005-07-13 devnull 		return nil;
 98 0c98da8b 2005-07-13 devnull 	bno = vbno;
 99 0c98da8b 2005-07-13 devnull 	if(bno != vbno)
100 0c98da8b 2005-07-13 devnull 		return nil;
101 0c98da8b 2005-07-13 devnull 
102 0c98da8b 2005-07-13 devnull /*	
103 0c98da8b 2005-07-13 devnull 	if(bno < fs->firstblock)
104 0c98da8b 2005-07-13 devnull 		return diskread(fs->disk, fs->blocksize, (u64int)bno*fs->blocksize);
105 0c98da8b 2005-07-13 devnull */
106 0c98da8b 2005-07-13 devnull 	if(bno < fs->firstblock)
107 0c98da8b 2005-07-13 devnull 		return nil;
108 0c98da8b 2005-07-13 devnull 
109 0c98da8b 2005-07-13 devnull 	bno -= fs->firstblock;
110 0c98da8b 2005-07-13 devnull 	if((g = ext2group(fs, bno/fs->blockspergroup, &gb)) == nil){
111 0c98da8b 2005-07-13 devnull 		if(debug)
112 0c98da8b 2005-07-13 devnull 			fprint(2, "loading group: %r...");
113 0c98da8b 2005-07-13 devnull 		return nil;
114 0c98da8b 2005-07-13 devnull 	}
115 e77222a4 2006-05-04 devnull /*
116 c1a4592d 2006-06-15 devnull 	if(debug)
117 c1a4592d 2006-06-15 devnull 		fprint(2, "ext2 group %d: bitblock=%ud inodebitblock=%ud inodeaddr=%ud freeblocks=%ud freeinodes=%ud useddirs=%ud\n",
118 c1a4592d 2006-06-15 devnull 			(int)(bno/fs->blockspergroup),
119 c1a4592d 2006-06-15 devnull 			g->bitblock,
120 c1a4592d 2006-06-15 devnull 			g->inodebitblock,
121 c1a4592d 2006-06-15 devnull 			g->inodeaddr,
122 c1a4592d 2006-06-15 devnull 			g->freeblockscount,
123 c1a4592d 2006-06-15 devnull 			g->freeinodescount,
124 c1a4592d 2006-06-15 devnull 			g->useddirscount);
125 e77222a4 2006-05-04 devnull 	if(debug)
126 e77222a4 2006-05-04 devnull 		fprint(2, "group %d bitblock=%d...", bno/fs->blockspergroup, g->bitblock);
127 e77222a4 2006-05-04 devnull */
128 c1a4592d 2006-06-15 devnull 	bitblock = g->bitblock;
129 c1a4592d 2006-06-15 devnull 	bitpos = (u64int)bitblock*fs->blocksize;
130 9bbcb80d 2006-06-15 devnull 	blockput(gb);
131 0c98da8b 2005-07-13 devnull 
132 9bbcb80d 2006-06-15 devnull 	if((bitb = diskread(fs->disk, fs->blocksize, bitpos)) == nil){
133 0c98da8b 2005-07-13 devnull 		if(debug)
134 0c98da8b 2005-07-13 devnull 			fprint(2, "loading bitblock: %r...");
135 0c98da8b 2005-07-13 devnull 		return nil;
136 0c98da8b 2005-07-13 devnull 	}
137 0c98da8b 2005-07-13 devnull 	bits = bitb->data;
138 0c98da8b 2005-07-13 devnull 	boff = bno%fs->blockspergroup;
139 0c98da8b 2005-07-13 devnull 	if((bits[boff>>3] & (1<<(boff&7))) == 0){
140 0c98da8b 2005-07-13 devnull 		if(debug)
141 c1a4592d 2006-06-15 devnull 			fprint(2, "block %d not allocated in group %d: bitblock %d/%lld bits[%d] = %#x\n",
142 c1a4592d 2006-06-15 devnull 				boff, bno/fs->blockspergroup, 
143 c1a4592d 2006-06-15 devnull 				(int)bitblock,
144 c1a4592d 2006-06-15 devnull 				bitpos,
145 c1a4592d 2006-06-15 devnull 				boff>>3,
146 c1a4592d 2006-06-15 devnull 				bits[boff>>3]);
147 0c98da8b 2005-07-13 devnull 		blockput(bitb);
148 0c98da8b 2005-07-13 devnull 		return nil;
149 0c98da8b 2005-07-13 devnull 	}
150 9bbcb80d 2006-06-15 devnull 	blockput(bitb);
151 0c98da8b 2005-07-13 devnull 
152 0c98da8b 2005-07-13 devnull 	bno += fs->firstblock;
153 0c98da8b 2005-07-13 devnull 	return diskread(fs->disk, fs->blocksize, (u64int)bno*fs->blocksize);
154 0c98da8b 2005-07-13 devnull }
155 0c98da8b 2005-07-13 devnull 
156 0c98da8b 2005-07-13 devnull static Block*
157 0c98da8b 2005-07-13 devnull ext2datablock(Ext2 *fs, u32int bno, int size)
158 0c98da8b 2005-07-13 devnull {
159 3330e5bf 2005-10-29 devnull 	USED(size);
160 e77222a4 2006-05-04 devnull 	return ext2blockread(fs->fsys, bno);
161 0c98da8b 2005-07-13 devnull }
162 0c98da8b 2005-07-13 devnull 
163 0c98da8b 2005-07-13 devnull static Block*
164 0c98da8b 2005-07-13 devnull ext2fileblock(Ext2 *fs, Inode *ino, u32int bno, int size)
165 0c98da8b 2005-07-13 devnull {
166 0c98da8b 2005-07-13 devnull 	int ppb;
167 0c98da8b 2005-07-13 devnull 	Block *b;
168 0c98da8b 2005-07-13 devnull 	u32int *a;
169 0c98da8b 2005-07-13 devnull 	u32int obno;
170 0c98da8b 2005-07-13 devnull 
171 0c98da8b 2005-07-13 devnull 	obno = bno;
172 0c98da8b 2005-07-13 devnull 	if(bno < NDIRBLOCKS){
173 0c98da8b 2005-07-13 devnull 		if(debug)
174 0c98da8b 2005-07-13 devnull 			fprint(2, "fileblock %d -> %d...", 
175 0c98da8b 2005-07-13 devnull 				bno, ino->block[bno]);
176 0c98da8b 2005-07-13 devnull 		return ext2datablock(fs, ino->block[bno], size);
177 0c98da8b 2005-07-13 devnull 	}
178 0c98da8b 2005-07-13 devnull 	bno -= NDIRBLOCKS;
179 0c98da8b 2005-07-13 devnull 	ppb = fs->blocksize/4;
180 0c98da8b 2005-07-13 devnull 
181 0c98da8b 2005-07-13 devnull 	/* one indirect */
182 0c98da8b 2005-07-13 devnull 	if(bno < ppb){
183 0c98da8b 2005-07-13 devnull 		b = ext2datablock(fs, ino->block[INDBLOCK], fs->blocksize);
184 0c98da8b 2005-07-13 devnull 		if(b == nil)
185 0c98da8b 2005-07-13 devnull 			return nil;
186 0c98da8b 2005-07-13 devnull 		a = (u32int*)b->data;
187 0c98da8b 2005-07-13 devnull 		bno = a[bno%ppb];
188 0c98da8b 2005-07-13 devnull 		blockput(b);
189 0c98da8b 2005-07-13 devnull 		return ext2datablock(fs, bno, size);
190 0c98da8b 2005-07-13 devnull 	}
191 0c98da8b 2005-07-13 devnull 	bno -= ppb;
192 0c98da8b 2005-07-13 devnull 
193 0c98da8b 2005-07-13 devnull 	/* one double indirect */
194 0c98da8b 2005-07-13 devnull 	if(bno < ppb*ppb){
195 0c98da8b 2005-07-13 devnull 		b = ext2datablock(fs, ino->block[DINDBLOCK], fs->blocksize);
196 0c98da8b 2005-07-13 devnull 		if(b == nil)
197 0c98da8b 2005-07-13 devnull 			return nil;
198 0c98da8b 2005-07-13 devnull 		a = (u32int*)b->data;
199 0c98da8b 2005-07-13 devnull 		bno = a[(bno/ppb)%ppb];
200 0c98da8b 2005-07-13 devnull 		blockput(b);
201 0c98da8b 2005-07-13 devnull 		b = ext2datablock(fs, bno, fs->blocksize);
202 0c98da8b 2005-07-13 devnull 		if(b == nil)
203 0c98da8b 2005-07-13 devnull 			return nil;
204 0c98da8b 2005-07-13 devnull 		a = (u32int*)b->data;
205 0c98da8b 2005-07-13 devnull 		bno = a[bno%ppb];
206 0c98da8b 2005-07-13 devnull 		blockput(b);
207 0c98da8b 2005-07-13 devnull 		return ext2datablock(fs, bno, size);
208 0c98da8b 2005-07-13 devnull 	}
209 0c98da8b 2005-07-13 devnull 	bno -= ppb*ppb;
210 0c98da8b 2005-07-13 devnull 
211 0c98da8b 2005-07-13 devnull 	/* one triple indirect */
212 0c98da8b 2005-07-13 devnull 	if(bno < ppb*ppb*ppb){
213 0c98da8b 2005-07-13 devnull 		b = ext2datablock(fs, ino->block[TINDBLOCK], fs->blocksize);
214 0c98da8b 2005-07-13 devnull 		if(b == nil)
215 0c98da8b 2005-07-13 devnull 			return nil;
216 0c98da8b 2005-07-13 devnull 		a = (u32int*)b->data;
217 0c98da8b 2005-07-13 devnull 		bno = a[(bno/(ppb*ppb))%ppb];
218 0c98da8b 2005-07-13 devnull 		blockput(b);
219 0c98da8b 2005-07-13 devnull 		b = ext2datablock(fs, bno, fs->blocksize);
220 0c98da8b 2005-07-13 devnull 		if(b == nil)
221 0c98da8b 2005-07-13 devnull 			return nil;
222 0c98da8b 2005-07-13 devnull 		a = (u32int*)b->data;
223 0c98da8b 2005-07-13 devnull 		bno = a[(bno/ppb)%ppb];
224 0c98da8b 2005-07-13 devnull 		blockput(b);
225 0c98da8b 2005-07-13 devnull 		b = ext2datablock(fs, bno, fs->blocksize);
226 0c98da8b 2005-07-13 devnull 		if(b == nil)
227 0c98da8b 2005-07-13 devnull 			return nil;
228 0c98da8b 2005-07-13 devnull 		a = (u32int*)b->data;
229 0c98da8b 2005-07-13 devnull 		bno = a[bno%ppb];
230 0c98da8b 2005-07-13 devnull 		blockput(b);
231 0c98da8b 2005-07-13 devnull 		return ext2datablock(fs, bno, size);
232 0c98da8b 2005-07-13 devnull 	}
233 0c98da8b 2005-07-13 devnull 
234 3330e5bf 2005-10-29 devnull 	fprint(2, "ext2fileblock %ud: too big\n", obno);
235 0c98da8b 2005-07-13 devnull 	return nil;
236 0c98da8b 2005-07-13 devnull }
237 0c98da8b 2005-07-13 devnull 
238 0c98da8b 2005-07-13 devnull static int
239 0c98da8b 2005-07-13 devnull checksuper(Super *super)
240 0c98da8b 2005-07-13 devnull {
241 0c98da8b 2005-07-13 devnull 	if(super->magic != SUPERMAGIC){
242 0c98da8b 2005-07-13 devnull 		werrstr("bad magic 0x%ux wanted 0x%ux", super->magic, SUPERMAGIC);
243 0c98da8b 2005-07-13 devnull 		return -1;
244 0c98da8b 2005-07-13 devnull 	}
245 0c98da8b 2005-07-13 devnull 	return 0;
246 0c98da8b 2005-07-13 devnull }
247 0c98da8b 2005-07-13 devnull 
248 0c98da8b 2005-07-13 devnull static int
249 0c98da8b 2005-07-13 devnull ext2sync(Fsys *fsys)
250 0c98da8b 2005-07-13 devnull {
251 0c98da8b 2005-07-13 devnull 	int i;
252 0c98da8b 2005-07-13 devnull 	Group *g;
253 0c98da8b 2005-07-13 devnull 	Block *b;
254 0c98da8b 2005-07-13 devnull 	Super *super;
255 0c98da8b 2005-07-13 devnull 	Ext2 *fs;
256 0c98da8b 2005-07-13 devnull 	Disk *disk;
257 0c98da8b 2005-07-13 devnull 
258 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
259 0c98da8b 2005-07-13 devnull 	disk = fs->disk;
260 0c98da8b 2005-07-13 devnull 	if((b = diskread(disk, SBSIZE, SBOFF)) == nil)
261 0c98da8b 2005-07-13 devnull 		goto error;
262 0c98da8b 2005-07-13 devnull 	super = (Super*)b->data;
263 0c98da8b 2005-07-13 devnull 	if(checksuper(super) < 0)
264 0c98da8b 2005-07-13 devnull 		goto error;
265 0c98da8b 2005-07-13 devnull 	fs->blocksize = MINBLOCKSIZE<<super->logblocksize;
266 0c98da8b 2005-07-13 devnull 	fs->nblock = super->nblock;
267 0c98da8b 2005-07-13 devnull 	fs->ngroup = (super->nblock+super->blockspergroup-1)
268 0c98da8b 2005-07-13 devnull 		/ super->blockspergroup;
269 0c98da8b 2005-07-13 devnull 	fs->inospergroup = super->inospergroup;
270 0c98da8b 2005-07-13 devnull 	fs->blockspergroup = super->blockspergroup;
271 0c98da8b 2005-07-13 devnull 	fs->inosperblock = fs->blocksize / InodeSize;
272 0c98da8b 2005-07-13 devnull 	if(fs->blocksize == SBOFF)
273 0c98da8b 2005-07-13 devnull 		fs->groupaddr = 2;
274 0c98da8b 2005-07-13 devnull 	else
275 0c98da8b 2005-07-13 devnull 		fs->groupaddr = 1;
276 0c98da8b 2005-07-13 devnull 	fs->descperblock = fs->blocksize / GroupSize;
277 0c98da8b 2005-07-13 devnull 	fs->firstblock = super->firstdatablock;
278 0c98da8b 2005-07-13 devnull 	blockput(b);
279 0c98da8b 2005-07-13 devnull 
280 0c98da8b 2005-07-13 devnull 	fsys->blocksize = fs->blocksize;
281 0c98da8b 2005-07-13 devnull 	fsys->nblock = fs->nblock;
282 0c98da8b 2005-07-13 devnull 	fprint(2, "ext2 %d %d-byte blocks, first data block %d, %d groups of %d\n",
283 0c98da8b 2005-07-13 devnull 		fs->nblock, fs->blocksize, fs->firstblock, fs->ngroup, fs->blockspergroup);
284 0c98da8b 2005-07-13 devnull 
285 0c98da8b 2005-07-13 devnull 	if(0){
286 0c98da8b 2005-07-13 devnull 		for(i=0; i<fs->ngroup; i++)
287 0c98da8b 2005-07-13 devnull 			if((g = ext2group(fs, i, &b)) != nil){
288 0c98da8b 2005-07-13 devnull 				fprint(2, "grp %d: bitblock=%d\n", i, g->bitblock);
289 0c98da8b 2005-07-13 devnull 				blockput(b);
290 0c98da8b 2005-07-13 devnull 			}
291 0c98da8b 2005-07-13 devnull 	}
292 0c98da8b 2005-07-13 devnull 	return 0;
293 0c98da8b 2005-07-13 devnull 
294 0c98da8b 2005-07-13 devnull error:
295 0c98da8b 2005-07-13 devnull 	blockput(b);
296 0c98da8b 2005-07-13 devnull 	return -1;
297 0c98da8b 2005-07-13 devnull }
298 0c98da8b 2005-07-13 devnull 
299 0c98da8b 2005-07-13 devnull static void
300 0c98da8b 2005-07-13 devnull mkhandle(Nfs3Handle *h, u64int ino)
301 0c98da8b 2005-07-13 devnull {
302 0c98da8b 2005-07-13 devnull 	h->h[0] = ino>>24;
303 0c98da8b 2005-07-13 devnull 	h->h[1] = ino>>16;
304 0c98da8b 2005-07-13 devnull 	h->h[2] = ino>>8;
305 0c98da8b 2005-07-13 devnull 	h->h[3] = ino;
306 0c98da8b 2005-07-13 devnull 	h->len = 4;
307 0c98da8b 2005-07-13 devnull }
308 0c98da8b 2005-07-13 devnull 
309 0c98da8b 2005-07-13 devnull static u32int
310 0c98da8b 2005-07-13 devnull byte2u32(uchar *p)
311 0c98da8b 2005-07-13 devnull {
312 0c98da8b 2005-07-13 devnull 	return (p[0]<<24) | (p[1]<<16) | (p[2]<<8) | p[3];
313 0c98da8b 2005-07-13 devnull }
314 0c98da8b 2005-07-13 devnull 
315 0c98da8b 2005-07-13 devnull static Nfs3Status
316 0c98da8b 2005-07-13 devnull handle2ino(Ext2 *fs, Nfs3Handle *h, u32int *pinum, Inode *ino)
317 0c98da8b 2005-07-13 devnull {
318 0c98da8b 2005-07-13 devnull 	int i;
319 0c98da8b 2005-07-13 devnull 	uint ioff;
320 0c98da8b 2005-07-13 devnull 	u32int inum;
321 0c98da8b 2005-07-13 devnull 	u32int addr;
322 0c98da8b 2005-07-13 devnull 	Block *gb, *b;
323 0c98da8b 2005-07-13 devnull 	Group *g;
324 0c98da8b 2005-07-13 devnull 
325 0c98da8b 2005-07-13 devnull 	if(h->len != 4)
326 0c98da8b 2005-07-13 devnull 		return Nfs3ErrBadHandle;
327 0c98da8b 2005-07-13 devnull 	inum = byte2u32(h->h);
328 0c98da8b 2005-07-13 devnull 	if(pinum)
329 0c98da8b 2005-07-13 devnull 		*pinum = inum;
330 0c98da8b 2005-07-13 devnull 	i = (inum-1) / fs->inospergroup;
331 0c98da8b 2005-07-13 devnull 	if(i >= fs->ngroup)
332 0c98da8b 2005-07-13 devnull 		return Nfs3ErrBadHandle;
333 0c98da8b 2005-07-13 devnull 	ioff = (inum-1) % fs->inospergroup;
334 0c98da8b 2005-07-13 devnull 	if((g = ext2group(fs, i, &gb)) == nil)
335 0c98da8b 2005-07-13 devnull 		return Nfs3ErrIo;
336 0c98da8b 2005-07-13 devnull 	addr = g->inodeaddr + ioff/fs->inosperblock;
337 0c98da8b 2005-07-13 devnull 	blockput(gb);
338 0c98da8b 2005-07-13 devnull 	if((b = diskread(fs->disk, fs->blocksize, (u64int)addr*fs->blocksize)) == nil)
339 0c98da8b 2005-07-13 devnull 		return Nfs3ErrIo;
340 0c98da8b 2005-07-13 devnull 	*ino = ((Inode*)b->data)[ioff%fs->inosperblock];
341 0c98da8b 2005-07-13 devnull 	blockput(b);
342 0c98da8b 2005-07-13 devnull 	return Nfs3Ok;
343 0c98da8b 2005-07-13 devnull }
344 0c98da8b 2005-07-13 devnull 
345 0c98da8b 2005-07-13 devnull static Nfs3Status
346 0c98da8b 2005-07-13 devnull ext2root(Fsys *fsys, Nfs3Handle *h)
347 0c98da8b 2005-07-13 devnull {
348 3330e5bf 2005-10-29 devnull 	USED(fsys);
349 0c98da8b 2005-07-13 devnull 	mkhandle(h, ROOTINODE);
350 0c98da8b 2005-07-13 devnull 	return Nfs3Ok;
351 0c98da8b 2005-07-13 devnull }
352 0c98da8b 2005-07-13 devnull 
353 0c98da8b 2005-07-13 devnull static Nfs3Status
354 0c98da8b 2005-07-13 devnull ino2attr(Ext2 *fs, Inode *ino, u32int inum, Nfs3Attr *attr)
355 0c98da8b 2005-07-13 devnull {
356 0c98da8b 2005-07-13 devnull 	u32int rdev;
357 0c98da8b 2005-07-13 devnull 
358 0c98da8b 2005-07-13 devnull 	attr->type = -1;
359 0c98da8b 2005-07-13 devnull 	switch(ino->mode&IFMT){
360 0c98da8b 2005-07-13 devnull 	case IFIFO:
361 0c98da8b 2005-07-13 devnull 		attr->type = Nfs3FileFifo;
362 0c98da8b 2005-07-13 devnull 		break;
363 0c98da8b 2005-07-13 devnull 	case IFCHR:
364 0c98da8b 2005-07-13 devnull 		attr->type = Nfs3FileChar;
365 0c98da8b 2005-07-13 devnull 		break;
366 0c98da8b 2005-07-13 devnull 	case IFDIR:
367 0c98da8b 2005-07-13 devnull 		attr->type = Nfs3FileDir;
368 0c98da8b 2005-07-13 devnull 		break;
369 0c98da8b 2005-07-13 devnull 	case IFBLK:
370 0c98da8b 2005-07-13 devnull 		attr->type = Nfs3FileBlock;
371 0c98da8b 2005-07-13 devnull 		break;
372 0c98da8b 2005-07-13 devnull 	case IFREG:
373 0c98da8b 2005-07-13 devnull 		attr->type = Nfs3FileReg;
374 0c98da8b 2005-07-13 devnull 		break;
375 0c98da8b 2005-07-13 devnull 	case IFLNK:
376 0c98da8b 2005-07-13 devnull 		attr->type = Nfs3FileSymlink;
377 0c98da8b 2005-07-13 devnull 		break;
378 0c98da8b 2005-07-13 devnull 	case IFSOCK:
379 0c98da8b 2005-07-13 devnull 		attr->type = Nfs3FileSocket;
380 0c98da8b 2005-07-13 devnull 		break;
381 0c98da8b 2005-07-13 devnull 	case IFWHT:
382 0c98da8b 2005-07-13 devnull 	default:
383 0c98da8b 2005-07-13 devnull 		return Nfs3ErrBadHandle;
384 0c98da8b 2005-07-13 devnull 	}
385 0c98da8b 2005-07-13 devnull 
386 0c98da8b 2005-07-13 devnull 	attr->mode = ino->mode&07777;
387 0c98da8b 2005-07-13 devnull 	attr->nlink = ino->nlink;
388 0c98da8b 2005-07-13 devnull 	attr->uid = ino->uid;
389 0c98da8b 2005-07-13 devnull 	attr->gid = ino->gid;
390 0c98da8b 2005-07-13 devnull 	attr->size = ino->size;
391 0c98da8b 2005-07-13 devnull 	attr->used = ino->nblock*fs->blocksize;
392 0c98da8b 2005-07-13 devnull 	if(attr->type==Nfs3FileBlock || attr->type==Nfs3FileChar){
393 0c98da8b 2005-07-13 devnull 		rdev = ino->block[0];
394 0c98da8b 2005-07-13 devnull 		attr->major = (rdev>>8)&0xFF;
395 0c98da8b 2005-07-13 devnull 		attr->minor = rdev & 0xFFFF00FF;
396 0c98da8b 2005-07-13 devnull 	}else{
397 0c98da8b 2005-07-13 devnull 		attr->major = 0;
398 0c98da8b 2005-07-13 devnull 		attr->minor = 0;
399 0c98da8b 2005-07-13 devnull 	}
400 0c98da8b 2005-07-13 devnull 	attr->fsid = 0;
401 0c98da8b 2005-07-13 devnull 	attr->fileid = inum;
402 0c98da8b 2005-07-13 devnull 	attr->atime.sec = ino->atime;
403 0c98da8b 2005-07-13 devnull 	attr->atime.nsec = 0;
404 0c98da8b 2005-07-13 devnull 	attr->mtime.sec = ino->mtime;
405 0c98da8b 2005-07-13 devnull 	attr->mtime.nsec = 0;
406 0c98da8b 2005-07-13 devnull 	attr->ctime.sec = ino->ctime;
407 0c98da8b 2005-07-13 devnull 	attr->ctime.nsec = 0;
408 0c98da8b 2005-07-13 devnull 	return Nfs3Ok;
409 0c98da8b 2005-07-13 devnull }
410 0c98da8b 2005-07-13 devnull 
411 0c98da8b 2005-07-13 devnull static int
412 0c98da8b 2005-07-13 devnull ingroup(SunAuthUnix *au, uint gid)
413 0c98da8b 2005-07-13 devnull {
414 0c98da8b 2005-07-13 devnull 	int i;
415 0c98da8b 2005-07-13 devnull 
416 0c98da8b 2005-07-13 devnull 	for(i=0; i<au->ng; i++)
417 0c98da8b 2005-07-13 devnull 		if(au->g[i] == gid)
418 0c98da8b 2005-07-13 devnull 			return 1;
419 0c98da8b 2005-07-13 devnull 	return 0;
420 0c98da8b 2005-07-13 devnull }
421 0c98da8b 2005-07-13 devnull 
422 0c98da8b 2005-07-13 devnull static Nfs3Status
423 0c98da8b 2005-07-13 devnull inoperm(Inode *ino, SunAuthUnix *au, int need)
424 0c98da8b 2005-07-13 devnull {
425 0c98da8b 2005-07-13 devnull 	int have;
426 0c98da8b 2005-07-13 devnull 
427 0c98da8b 2005-07-13 devnull 	if(allowall)
428 0c98da8b 2005-07-13 devnull 		return Nfs3Ok;
429 0c98da8b 2005-07-13 devnull 
430 0c98da8b 2005-07-13 devnull 	have = ino->mode&0777;
431 0c98da8b 2005-07-13 devnull 	if(ino->uid == au->uid)
432 0c98da8b 2005-07-13 devnull 		have >>= 6;
433 0c98da8b 2005-07-13 devnull 	else if(ino->gid == au->gid || ingroup(au, ino->gid))
434 0c98da8b 2005-07-13 devnull 		have >>= 3;
435 0c98da8b 2005-07-13 devnull 
436 0c98da8b 2005-07-13 devnull 	if((have&need) != need)
437 0c98da8b 2005-07-13 devnull 		return Nfs3ErrNotOwner;	/* really EPERM */
438 0c98da8b 2005-07-13 devnull 	return Nfs3Ok;
439 0c98da8b 2005-07-13 devnull }
440 0c98da8b 2005-07-13 devnull 
441 0c98da8b 2005-07-13 devnull static Nfs3Status
442 0c98da8b 2005-07-13 devnull ext2getattr(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, Nfs3Attr *attr)
443 0c98da8b 2005-07-13 devnull {
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;
448 0c98da8b 2005-07-13 devnull 
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;
452 0c98da8b 2005-07-13 devnull 
453 0c98da8b 2005-07-13 devnull 	USED(au);	/* anyone can getattr */
454 0c98da8b 2005-07-13 devnull 	return ino2attr(fs, &ino, inum, attr);
455 0c98da8b 2005-07-13 devnull }
456 0c98da8b 2005-07-13 devnull 
457 0c98da8b 2005-07-13 devnull static Nfs3Status
458 0c98da8b 2005-07-13 devnull ext2access(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int want, u32int *got, Nfs3Attr *attr)
459 0c98da8b 2005-07-13 devnull {
460 0c98da8b 2005-07-13 devnull 	int have;
461 0c98da8b 2005-07-13 devnull 	Inode ino;
462 0c98da8b 2005-07-13 devnull 	u32int inum;
463 0c98da8b 2005-07-13 devnull 	Ext2 *fs;
464 0c98da8b 2005-07-13 devnull 	Nfs3Status ok;
465 0c98da8b 2005-07-13 devnull 
466 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
467 0c98da8b 2005-07-13 devnull 	if((ok = handle2ino(fs, h, &inum, &ino)) != Nfs3Ok)
468 0c98da8b 2005-07-13 devnull 		return ok;
469 0c98da8b 2005-07-13 devnull 
470 0c98da8b 2005-07-13 devnull 	have = ino.mode&0777;
471 0c98da8b 2005-07-13 devnull 	if(ino.uid == au->uid)
472 0c98da8b 2005-07-13 devnull 		have >>= 6;
473 0c98da8b 2005-07-13 devnull 	else if(ino.gid == au->gid || ingroup(au, ino.gid))
474 0c98da8b 2005-07-13 devnull 		have >>= 3;
475 0c98da8b 2005-07-13 devnull 
476 0c98da8b 2005-07-13 devnull 	*got = 0;
477 0c98da8b 2005-07-13 devnull 	if((want&Nfs3AccessRead) && (have&AREAD))
478 0c98da8b 2005-07-13 devnull 		*got |= Nfs3AccessRead;
479 0c98da8b 2005-07-13 devnull 	if((want&Nfs3AccessLookup) && (ino.mode&IFMT)==IFDIR && (have&AEXEC))
480 0c98da8b 2005-07-13 devnull 		*got |= Nfs3AccessLookup;
481 0c98da8b 2005-07-13 devnull 	if((want&Nfs3AccessExecute) && (ino.mode&IFMT)!=IFDIR && (have&AEXEC))
482 0c98da8b 2005-07-13 devnull 		*got |= Nfs3AccessExecute;
483 0c98da8b 2005-07-13 devnull 
484 0c98da8b 2005-07-13 devnull 	return ino2attr(fs, &ino, inum, attr);
485 0c98da8b 2005-07-13 devnull }
486 0c98da8b 2005-07-13 devnull 
487 0c98da8b 2005-07-13 devnull static Nfs3Status
488 0c98da8b 2005-07-13 devnull ext2lookup(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, char *name, Nfs3Handle *nh)
489 0c98da8b 2005-07-13 devnull {
490 0c98da8b 2005-07-13 devnull 	u32int nblock;
491 0c98da8b 2005-07-13 devnull 	u32int i;
492 0c98da8b 2005-07-13 devnull 	uchar *p, *ep;
493 0c98da8b 2005-07-13 devnull 	Dirent *de;
494 0c98da8b 2005-07-13 devnull 	Inode ino;
495 0c98da8b 2005-07-13 devnull 	Block *b;
496 0c98da8b 2005-07-13 devnull 	Ext2 *fs;
497 0c98da8b 2005-07-13 devnull 	Nfs3Status ok;
498 0c98da8b 2005-07-13 devnull 	int len, want;
499 0c98da8b 2005-07-13 devnull 
500 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
501 0c98da8b 2005-07-13 devnull 	if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok)
502 0c98da8b 2005-07-13 devnull 		return ok;
503 0c98da8b 2005-07-13 devnull 
504 0c98da8b 2005-07-13 devnull 	if((ino.mode&IFMT) != IFDIR)
505 0c98da8b 2005-07-13 devnull 		return Nfs3ErrNotDir;
506 0c98da8b 2005-07-13 devnull 
507 0c98da8b 2005-07-13 devnull 	if((ok = inoperm(&ino, au, AEXEC)) != Nfs3Ok)
508 0c98da8b 2005-07-13 devnull 		return ok;
509 0c98da8b 2005-07-13 devnull 
510 0c98da8b 2005-07-13 devnull 	len = strlen(name);
511 0c98da8b 2005-07-13 devnull 	nblock = (ino.size+fs->blocksize-1) / fs->blocksize;
512 0c98da8b 2005-07-13 devnull 	if(debug) fprint(2, "%d blocks in dir...", nblock);
513 0c98da8b 2005-07-13 devnull 	for(i=0; i<nblock; i++){
514 0c98da8b 2005-07-13 devnull 		if(i==nblock-1)
515 0c98da8b 2005-07-13 devnull 			want = ino.size % fs->blocksize;
516 0c98da8b 2005-07-13 devnull 		else
517 0c98da8b 2005-07-13 devnull 			want = fs->blocksize;
518 0c98da8b 2005-07-13 devnull 		b = ext2fileblock(fs, &ino, i, want);
519 0c98da8b 2005-07-13 devnull 		if(b == nil){
520 0c98da8b 2005-07-13 devnull 			if(debug) fprint(2, "empty block...");
521 0c98da8b 2005-07-13 devnull 			continue;
522 0c98da8b 2005-07-13 devnull 		}
523 0c98da8b 2005-07-13 devnull 		p = b->data;
524 0c98da8b 2005-07-13 devnull 		ep = p+b->len;
525 0c98da8b 2005-07-13 devnull 		while(p < ep){
526 0c98da8b 2005-07-13 devnull 			de = (Dirent*)p;
527 0c98da8b 2005-07-13 devnull 			if(de->reclen == 0){
528 0c98da8b 2005-07-13 devnull 				if(debug)
529 0c98da8b 2005-07-13 devnull 					fprint(2, "reclen 0 at offset %d of %d\n", (int)(p-b->data), b->len);
530 0c98da8b 2005-07-13 devnull 				break;
531 0c98da8b 2005-07-13 devnull 			}
532 0c98da8b 2005-07-13 devnull 			p += de->reclen;
533 0c98da8b 2005-07-13 devnull 			if(p > ep){
534 0c98da8b 2005-07-13 devnull 				if(debug)
535 0c98da8b 2005-07-13 devnull 					fprint(2, "bad len %d at offset %d of %d\n", de->reclen, (int)(p-b->data), b->len);
536 0c98da8b 2005-07-13 devnull 				break;
537 0c98da8b 2005-07-13 devnull 			}
538 0c98da8b 2005-07-13 devnull 			if(de->ino == 0)
539 0c98da8b 2005-07-13 devnull 				continue;
540 0c98da8b 2005-07-13 devnull 			if(4+2+2+de->namlen > de->reclen){
541 0c98da8b 2005-07-13 devnull 				if(debug)
542 0c98da8b 2005-07-13 devnull 					fprint(2, "bad namelen %d at offset %d of %d\n", de->namlen, (int)(p-b->data), b->len);
543 0c98da8b 2005-07-13 devnull 				break;
544 0c98da8b 2005-07-13 devnull 			}
545 0c98da8b 2005-07-13 devnull 			if(de->namlen == len && memcmp(de->name, name, len) == 0){
546 0c98da8b 2005-07-13 devnull 				mkhandle(nh, de->ino);
547 0c98da8b 2005-07-13 devnull 				blockput(b);
548 0c98da8b 2005-07-13 devnull 				return Nfs3Ok;
549 0c98da8b 2005-07-13 devnull 			}
550 0c98da8b 2005-07-13 devnull 		}
551 0c98da8b 2005-07-13 devnull 		blockput(b);
552 0c98da8b 2005-07-13 devnull 	}
553 0c98da8b 2005-07-13 devnull 	return Nfs3ErrNoEnt;
554 0c98da8b 2005-07-13 devnull }
555 0c98da8b 2005-07-13 devnull 
556 0c98da8b 2005-07-13 devnull static Nfs3Status
557 0c98da8b 2005-07-13 devnull ext2readdir(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int count, u64int cookie, uchar **pdata, u32int *pcount, u1int *peof)
558 0c98da8b 2005-07-13 devnull {
559 0c98da8b 2005-07-13 devnull 	u32int nblock;
560 0c98da8b 2005-07-13 devnull 	u32int i;
561 0c98da8b 2005-07-13 devnull 	int off, done;
562 0c98da8b 2005-07-13 devnull 	uchar *data, *dp, *dep, *p, *ep, *ndp;
563 0c98da8b 2005-07-13 devnull 	Dirent *de;
564 0c98da8b 2005-07-13 devnull 	Inode ino;
565 0c98da8b 2005-07-13 devnull 	Block *b;
566 0c98da8b 2005-07-13 devnull 	Ext2 *fs;
567 0c98da8b 2005-07-13 devnull 	Nfs3Status ok;
568 0c98da8b 2005-07-13 devnull 	Nfs3Entry e;
569 0c98da8b 2005-07-13 devnull 	int want;
570 0c98da8b 2005-07-13 devnull 
571 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
572 0c98da8b 2005-07-13 devnull 	if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok)
573 0c98da8b 2005-07-13 devnull 		return ok;
574 0c98da8b 2005-07-13 devnull 
575 0c98da8b 2005-07-13 devnull 	if((ino.mode&IFMT) != IFDIR)
576 0c98da8b 2005-07-13 devnull 		return Nfs3ErrNotDir;
577 0c98da8b 2005-07-13 devnull 
578 0c98da8b 2005-07-13 devnull 	if((ok = inoperm(&ino, au, AREAD)) != Nfs3Ok)
579 0c98da8b 2005-07-13 devnull 		return ok;
580 0c98da8b 2005-07-13 devnull 
581 0c98da8b 2005-07-13 devnull 	if(cookie >= ino.size){
582 0c98da8b 2005-07-13 devnull 		*pcount = 0;
583 0c98da8b 2005-07-13 devnull 		*pdata = 0;
584 0c98da8b 2005-07-13 devnull 		return Nfs3Ok;
585 0c98da8b 2005-07-13 devnull 	}
586 0c98da8b 2005-07-13 devnull 
587 0c98da8b 2005-07-13 devnull 	dp = malloc(count);
588 0c98da8b 2005-07-13 devnull 	data = dp;
589 0c98da8b 2005-07-13 devnull 	if(dp == nil)
590 0c98da8b 2005-07-13 devnull 		return Nfs3ErrNoMem;
591 0c98da8b 2005-07-13 devnull 	dep = dp+count;
592 0c98da8b 2005-07-13 devnull 	*peof = 0;
593 0c98da8b 2005-07-13 devnull 	nblock = (ino.size+fs->blocksize-1) / fs->blocksize;
594 0c98da8b 2005-07-13 devnull 	i = cookie/fs->blocksize;
595 0c98da8b 2005-07-13 devnull 	off = cookie%fs->blocksize;
596 0c98da8b 2005-07-13 devnull 	done = 0;
597 0c98da8b 2005-07-13 devnull 	for(; i<nblock && !done; i++){
598 0c98da8b 2005-07-13 devnull 		if(i==nblock-1)
599 0c98da8b 2005-07-13 devnull 			want = ino.size % fs->blocksize;
600 0c98da8b 2005-07-13 devnull 		else
601 0c98da8b 2005-07-13 devnull 			want = fs->blocksize;
602 0c98da8b 2005-07-13 devnull 		b = ext2fileblock(fs, &ino, i, want);
603 0c98da8b 2005-07-13 devnull 		if(b == nil)
604 0c98da8b 2005-07-13 devnull 			continue;
605 0c98da8b 2005-07-13 devnull 		p = b->data;
606 0c98da8b 2005-07-13 devnull 		ep = p+b->len;
607 0c98da8b 2005-07-13 devnull 		memset(&e, 0, sizeof e);
608 0c98da8b 2005-07-13 devnull 		while(p < ep){
609 0c98da8b 2005-07-13 devnull 			de = (Dirent*)p;
610 0c98da8b 2005-07-13 devnull 			if(de->reclen == 0){
611 0c98da8b 2005-07-13 devnull 				if(debug) fprint(2, "reclen 0 at offset %d of %d\n", (int)(p-b->data), b->len);
612 0c98da8b 2005-07-13 devnull 				break;
613 0c98da8b 2005-07-13 devnull 			}
614 0c98da8b 2005-07-13 devnull 			p += de->reclen;
615 0c98da8b 2005-07-13 devnull 			if(p > ep){
616 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);
617 0c98da8b 2005-07-13 devnull 				break;
618 0c98da8b 2005-07-13 devnull 			}
619 0c98da8b 2005-07-13 devnull 			if(de->ino == 0){
620 0c98da8b 2005-07-13 devnull 				if(debug) fprint(2, "zero inode\n");
621 0c98da8b 2005-07-13 devnull 				continue;
622 0c98da8b 2005-07-13 devnull 			}
623 0c98da8b 2005-07-13 devnull 			if(4+2+2+de->namlen > de->reclen){
624 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);
625 0c98da8b 2005-07-13 devnull 				break;
626 0c98da8b 2005-07-13 devnull 			}
627 e77222a4 2006-05-04 devnull 			if(debug) print("%.*s/%d ", de->namlen, de->name, (int)de->ino);
628 0c98da8b 2005-07-13 devnull 			if((uchar*)de - b->data < off)
629 0c98da8b 2005-07-13 devnull 				continue;
630 0c98da8b 2005-07-13 devnull 			e.fileid = de->ino;
631 0c98da8b 2005-07-13 devnull 			e.name = de->name;
632 e77222a4 2006-05-04 devnull 			e.namelen = de->namlen;
633 0c98da8b 2005-07-13 devnull 			e.cookie = (u64int)i*fs->blocksize + (p - b->data);
634 0c98da8b 2005-07-13 devnull 			if(nfs3entrypack(dp, dep, &ndp, &e) < 0){
635 0c98da8b 2005-07-13 devnull 				done = 1;
636 0c98da8b 2005-07-13 devnull 				break;
637 0c98da8b 2005-07-13 devnull 			}
638 0c98da8b 2005-07-13 devnull 			dp = ndp;
639 0c98da8b 2005-07-13 devnull 		}
640 0c98da8b 2005-07-13 devnull 		off = 0;
641 0c98da8b 2005-07-13 devnull 		blockput(b);
642 0c98da8b 2005-07-13 devnull 	}
643 0c98da8b 2005-07-13 devnull 	if(i==nblock)
644 0c98da8b 2005-07-13 devnull 		*peof = 1;
645 0c98da8b 2005-07-13 devnull 
646 0c98da8b 2005-07-13 devnull 	*pcount = dp - data;
647 0c98da8b 2005-07-13 devnull 	*pdata = data;
648 0c98da8b 2005-07-13 devnull 	return Nfs3Ok;
649 0c98da8b 2005-07-13 devnull }
650 0c98da8b 2005-07-13 devnull 
651 0c98da8b 2005-07-13 devnull static Nfs3Status
652 0c98da8b 2005-07-13 devnull ext2readfile(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int count,
653 0c98da8b 2005-07-13 devnull 	u64int offset, uchar **pdata, u32int *pcount, u1int *peof)
654 0c98da8b 2005-07-13 devnull {
655 0c98da8b 2005-07-13 devnull 	uchar *data;
656 0c98da8b 2005-07-13 devnull 	Block *b;
657 0c98da8b 2005-07-13 devnull 	Ext2 *fs;
658 fa5af687 2006-06-15 devnull 	int skip1, tot, want, fragcount;
659 0c98da8b 2005-07-13 devnull 	Inode ino;
660 0c98da8b 2005-07-13 devnull 	Nfs3Status ok;
661 0c98da8b 2005-07-13 devnull 
662 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
663 0c98da8b 2005-07-13 devnull 	if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok)
664 0c98da8b 2005-07-13 devnull 		return ok;
665 0c98da8b 2005-07-13 devnull 
666 0c98da8b 2005-07-13 devnull 	if((ok = inoperm(&ino, au, AREAD)) != Nfs3Ok)
667 0c98da8b 2005-07-13 devnull 		return ok;
668 0c98da8b 2005-07-13 devnull 
669 0c98da8b 2005-07-13 devnull 	if(offset >= ino.size){
670 0c98da8b 2005-07-13 devnull 		*pdata = 0;
671 0c98da8b 2005-07-13 devnull 		*pcount = 0;
672 0c98da8b 2005-07-13 devnull 		*peof = 1;
673 0c98da8b 2005-07-13 devnull 		return Nfs3Ok;
674 0c98da8b 2005-07-13 devnull 	}
675 0c98da8b 2005-07-13 devnull 	if(offset+count > ino.size)
676 0c98da8b 2005-07-13 devnull 		count = ino.size-offset;
677 0c98da8b 2005-07-13 devnull 
678 0c98da8b 2005-07-13 devnull 	data = malloc(count);
679 0c98da8b 2005-07-13 devnull 	if(data == nil)
680 0c98da8b 2005-07-13 devnull 		return Nfs3ErrNoMem;
681 fa5af687 2006-06-15 devnull 	memset(data, 0, count);
682 0c98da8b 2005-07-13 devnull 
683 fa5af687 2006-06-15 devnull 	skip1 = offset%fs->blocksize;
684 fa5af687 2006-06-15 devnull 	offset -= skip1;
685 fa5af687 2006-06-15 devnull 	want = skip1+count;
686 0c98da8b 2005-07-13 devnull 
687 fa5af687 2006-06-15 devnull 	/*
688 fa5af687 2006-06-15 devnull 	 * have to read multiple blocks if we get asked for a big read.
689 fa5af687 2006-06-15 devnull 	 * Linux NFS client assumes that if you ask for 8k and only get 4k
690 fa5af687 2006-06-15 devnull 	 * back, the remaining 4k is zeros.
691 fa5af687 2006-06-15 devnull 	 */
692 fa5af687 2006-06-15 devnull 	for(tot=0; tot<want; tot+=fragcount){
693 fa5af687 2006-06-15 devnull 		b = ext2fileblock(fs, &ino, (offset+tot)/fs->blocksize, fs->blocksize);
694 fa5af687 2006-06-15 devnull 		fragcount = fs->blocksize;
695 fa5af687 2006-06-15 devnull 		if(b == nil)
696 fa5af687 2006-06-15 devnull 			continue;
697 fa5af687 2006-06-15 devnull 		if(tot+fragcount > want)
698 fa5af687 2006-06-15 devnull 			fragcount = want - tot;
699 fa5af687 2006-06-15 devnull 		if(tot == 0)
700 fa5af687 2006-06-15 devnull 			memmove(data, b->data+skip1, fragcount-skip1);
701 fa5af687 2006-06-15 devnull 		else
702 fa5af687 2006-06-15 devnull 			memmove(data+tot-skip1, b->data, fragcount);
703 0c98da8b 2005-07-13 devnull 		blockput(b);
704 0c98da8b 2005-07-13 devnull 	}
705 fa5af687 2006-06-15 devnull 	count = tot - skip1;
706 fa5af687 2006-06-15 devnull 
707 0c98da8b 2005-07-13 devnull 	*peof = (offset+count == ino.size);
708 0c98da8b 2005-07-13 devnull 	*pcount = count;
709 0c98da8b 2005-07-13 devnull 	*pdata = data;
710 0c98da8b 2005-07-13 devnull 	return Nfs3Ok;
711 0c98da8b 2005-07-13 devnull }
712 0c98da8b 2005-07-13 devnull 
713 0c98da8b 2005-07-13 devnull static Nfs3Status
714 0c98da8b 2005-07-13 devnull ext2readlink(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, char **link)
715 0c98da8b 2005-07-13 devnull {
716 0c98da8b 2005-07-13 devnull 	Ext2 *fs;
717 0c98da8b 2005-07-13 devnull 	Nfs3Status ok;
718 0c98da8b 2005-07-13 devnull 	int len;
719 0c98da8b 2005-07-13 devnull 	Inode ino;
720 0c98da8b 2005-07-13 devnull 	Block *b;
721 0c98da8b 2005-07-13 devnull 
722 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
723 0c98da8b 2005-07-13 devnull 	if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok)
724 0c98da8b 2005-07-13 devnull 		return ok;
725 0c98da8b 2005-07-13 devnull 	if((ok = inoperm(&ino, au, AREAD)) != Nfs3Ok)
726 0c98da8b 2005-07-13 devnull 		return ok;
727 0c98da8b 2005-07-13 devnull 
728 0c98da8b 2005-07-13 devnull 	if(ino.size > 1024)
729 0c98da8b 2005-07-13 devnull 		return Nfs3ErrIo;
730 0c98da8b 2005-07-13 devnull 	len = ino.size;
731 0c98da8b 2005-07-13 devnull 
732 0c98da8b 2005-07-13 devnull 	if(ino.nblock != 0){
733 0c98da8b 2005-07-13 devnull 		/* BUG: assumes symlink fits in one block */
734 0c98da8b 2005-07-13 devnull 		b = ext2fileblock(fs, &ino, 0, len);
735 0c98da8b 2005-07-13 devnull 		if(b == nil)
736 0c98da8b 2005-07-13 devnull 			return Nfs3ErrIo;
737 0c98da8b 2005-07-13 devnull 		if(memchr(b->data, 0, len) != nil){
738 0c98da8b 2005-07-13 devnull 			blockput(b);
739 0c98da8b 2005-07-13 devnull 			return Nfs3ErrIo;
740 0c98da8b 2005-07-13 devnull 		}
741 0c98da8b 2005-07-13 devnull 		*link = malloc(len+1);
742 0c98da8b 2005-07-13 devnull 		if(*link == 0){
743 0c98da8b 2005-07-13 devnull 			blockput(b);
744 0c98da8b 2005-07-13 devnull 			return Nfs3ErrNoMem;
745 0c98da8b 2005-07-13 devnull 		}
746 0c98da8b 2005-07-13 devnull 		memmove(*link, b->data, len);
747 0c98da8b 2005-07-13 devnull 		(*link)[len] = 0;
748 0c98da8b 2005-07-13 devnull 		blockput(b);
749 0c98da8b 2005-07-13 devnull 		return Nfs3Ok;
750 0c98da8b 2005-07-13 devnull 	}
751 0c98da8b 2005-07-13 devnull 
752 0c98da8b 2005-07-13 devnull 	if(len > sizeof ino.block)
753 0c98da8b 2005-07-13 devnull 		return Nfs3ErrIo;
754 0c98da8b 2005-07-13 devnull 
755 0c98da8b 2005-07-13 devnull 	*link = malloc(len+1);
756 0c98da8b 2005-07-13 devnull 	if(*link == 0)
757 0c98da8b 2005-07-13 devnull 		return Nfs3ErrNoMem;
758 0c98da8b 2005-07-13 devnull 	memmove(*link, ino.block, ino.size);
759 0c98da8b 2005-07-13 devnull 	(*link)[len] = 0;
760 0c98da8b 2005-07-13 devnull 	return Nfs3Ok;
761 0c98da8b 2005-07-13 devnull }
762 0c98da8b 2005-07-13 devnull