1 0c98da8b 2005-07-13 devnull #include <u.h>
  2 0c98da8b 2005-07-13 devnull #include <libc.h>
  3 0c98da8b 2005-07-13 devnull #include <thread.h>
  4 0c98da8b 2005-07-13 devnull #include <sunrpc.h>
  5 0c98da8b 2005-07-13 devnull #include <nfs3.h>
  6 0c98da8b 2005-07-13 devnull #include <diskfs.h>
  7 0c98da8b 2005-07-13 devnull #include "ffs.h"
  8 0c98da8b 2005-07-13 devnull 
  9 e060bc52 2005-08-11 devnull #define BADBNO	((u64int)~0ULL)
 10 e060bc52 2005-08-11 devnull 
 11 0c98da8b 2005-07-13 devnull #define checkcg 0
 12 0c98da8b 2005-07-13 devnull #define debug 0
 13 0c98da8b 2005-07-13 devnull 
 14 0c98da8b 2005-07-13 devnull static int checkfsblk(Fsblk*);
 15 0c98da8b 2005-07-13 devnull static int checkcgblk(Cgblk*);
 16 0c98da8b 2005-07-13 devnull static Block *ffsblockread(Fsys*, u64int);
 17 0c98da8b 2005-07-13 devnull static int ffssync(Fsys*);
 18 0c98da8b 2005-07-13 devnull static void ffsclose(Fsys*);
 19 0c98da8b 2005-07-13 devnull 
 20 9f4a65a0 2005-07-28 devnull static u64int ffsxfileblock(Fsys *fs, Nfs3Handle *h, u64int offset);
 21 0c98da8b 2005-07-13 devnull static Nfs3Status ffsroot(Fsys*, Nfs3Handle*);
 22 0c98da8b 2005-07-13 devnull static Nfs3Status ffsgetattr(Fsys*, SunAuthUnix *au, Nfs3Handle*, Nfs3Attr*);
 23 0c98da8b 2005-07-13 devnull static Nfs3Status ffslookup(Fsys*, SunAuthUnix *au, Nfs3Handle*, char*, Nfs3Handle*);
 24 0c98da8b 2005-07-13 devnull static Nfs3Status ffsreadfile(Fsys*, SunAuthUnix *au, Nfs3Handle*, u32int, u64int, uchar**, u32int*, u1int*);
 25 0c98da8b 2005-07-13 devnull static Nfs3Status ffsreadlink(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, char **link);
 26 0c98da8b 2005-07-13 devnull static Nfs3Status ffsreaddir(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int, u64int, uchar**, u32int*, u1int*);
 27 0c98da8b 2005-07-13 devnull static Nfs3Status ffsaccess(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int want, u32int *got, Nfs3Attr *attr);
 28 0c98da8b 2005-07-13 devnull 
 29 0c98da8b 2005-07-13 devnull Fsys*
 30 0c98da8b 2005-07-13 devnull fsysopenffs(Disk *disk)
 31 0c98da8b 2005-07-13 devnull {
 32 0c98da8b 2005-07-13 devnull 	Ffs *fs;
 33 0c98da8b 2005-07-13 devnull 	Fsys *fsys;
 34 0c98da8b 2005-07-13 devnull 
 35 0c98da8b 2005-07-13 devnull 	fsys = emalloc(sizeof(Fsys));
 36 0c98da8b 2005-07-13 devnull 	fs = emalloc(sizeof(Ffs));
 37 0c98da8b 2005-07-13 devnull 	fs->disk = disk;
 38 0c98da8b 2005-07-13 devnull 	fsys->priv = fs;
 39 0c98da8b 2005-07-13 devnull 	fsys->type = "ffs";
 40 0c98da8b 2005-07-13 devnull 	fsys->_readblock = ffsblockread;
 41 0c98da8b 2005-07-13 devnull 	fsys->_sync = ffssync;
 42 0c98da8b 2005-07-13 devnull 	fsys->_root = ffsroot;
 43 0c98da8b 2005-07-13 devnull 	fsys->_getattr = ffsgetattr;
 44 0c98da8b 2005-07-13 devnull 	fsys->_access = ffsaccess;
 45 0c98da8b 2005-07-13 devnull 	fsys->_lookup = ffslookup;
 46 0c98da8b 2005-07-13 devnull 	fsys->_readfile = ffsreadfile;
 47 0c98da8b 2005-07-13 devnull 	fsys->_readlink = ffsreadlink;
 48 0c98da8b 2005-07-13 devnull 	fsys->_readdir = ffsreaddir;
 49 9f4a65a0 2005-07-28 devnull 	fsys->fileblock = ffsxfileblock;
 50 0c98da8b 2005-07-13 devnull 
 51 0c98da8b 2005-07-13 devnull 	if(ffssync(fsys) < 0)
 52 0c98da8b 2005-07-13 devnull 		goto error;
 53 0c98da8b 2005-07-13 devnull 
 54 0c98da8b 2005-07-13 devnull 	return fsys;
 55 0c98da8b 2005-07-13 devnull 
 56 0c98da8b 2005-07-13 devnull error:
 57 0c98da8b 2005-07-13 devnull 	ffsclose(fsys);
 58 0c98da8b 2005-07-13 devnull 	return nil;
 59 0c98da8b 2005-07-13 devnull }
 60 0c98da8b 2005-07-13 devnull 
 61 0c98da8b 2005-07-13 devnull static Cgblk*
 62 e060bc52 2005-08-11 devnull ffscylgrp(Ffs *fs, u32int i, Block **pb)
 63 0c98da8b 2005-07-13 devnull {
 64 0c98da8b 2005-07-13 devnull 	Block *b;
 65 0c98da8b 2005-07-13 devnull 	Cgblk *cg;
 66 0c98da8b 2005-07-13 devnull 
 67 0c98da8b 2005-07-13 devnull 	if(i >= fs->ncg)
 68 0c98da8b 2005-07-13 devnull 		return nil;
 69 0c98da8b 2005-07-13 devnull 
 70 0c98da8b 2005-07-13 devnull 	b = diskread(fs->disk, fs->blocksize, (u64int)fs->cg[i].cgblkno*fs->blocksize);
 71 0c98da8b 2005-07-13 devnull 	if(b == nil)
 72 0c98da8b 2005-07-13 devnull 		return nil;
 73 0c98da8b 2005-07-13 devnull 	cg = (Cgblk*)b->data;
 74 0c98da8b 2005-07-13 devnull 	if(checkcgblk(cg) < 0){
 75 0c98da8b 2005-07-13 devnull fprint(2, "checkcgblk %d %lud: %r\n", i, (ulong)fs->cg[i].cgblkno);
 76 0c98da8b 2005-07-13 devnull 		blockput(b);
 77 0c98da8b 2005-07-13 devnull 		return nil;
 78 0c98da8b 2005-07-13 devnull 	}
 79 0c98da8b 2005-07-13 devnull 	*pb = b;
 80 0c98da8b 2005-07-13 devnull 	return cg;
 81 0c98da8b 2005-07-13 devnull }
 82 0c98da8b 2005-07-13 devnull 
 83 0c98da8b 2005-07-13 devnull static int
 84 0c98da8b 2005-07-13 devnull ffssync(Fsys *fsys)
 85 0c98da8b 2005-07-13 devnull {
 86 0c98da8b 2005-07-13 devnull 	int i;
 87 e060bc52 2005-08-11 devnull 	int off[] = { SBOFF, SBOFF2, SBOFFPIGGY };
 88 0c98da8b 2005-07-13 devnull 	Block *b, *cgb;
 89 0c98da8b 2005-07-13 devnull 	Cgblk *cgblk;
 90 0c98da8b 2005-07-13 devnull 	Cylgrp *cg;
 91 0c98da8b 2005-07-13 devnull 	Disk *disk;
 92 0c98da8b 2005-07-13 devnull 	Ffs *fs;
 93 0c98da8b 2005-07-13 devnull 	Fsblk *fsblk;
 94 0c98da8b 2005-07-13 devnull 
 95 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
 96 0c98da8b 2005-07-13 devnull 	disk = fs->disk;
 97 0c98da8b 2005-07-13 devnull 
 98 0c98da8b 2005-07-13 devnull 	/*
 99 0c98da8b 2005-07-13 devnull 	 * Read super block.
100 0c98da8b 2005-07-13 devnull 	 */
101 9614b46f 2005-10-29 devnull 	b = nil;
102 e060bc52 2005-08-11 devnull 	for(i=0; i<nelem(off); i++){
103 e060bc52 2005-08-11 devnull 		if((b = diskread(disk, SBSIZE, off[i])) == nil)
104 e060bc52 2005-08-11 devnull 			goto error;
105 e060bc52 2005-08-11 devnull 		fsblk = (Fsblk*)b->data;
106 6802a899 2006-04-28 devnull 	//	fprint(2, "offset of magic: %ld\n", offsetof(Fsblk, magic));
107 e060bc52 2005-08-11 devnull 		if((fs->ufs = checkfsblk(fsblk)) > 0)
108 e060bc52 2005-08-11 devnull 			goto okay;
109 e060bc52 2005-08-11 devnull 		blockput(b);
110 5e084a4a 2006-04-28 devnull 		b = nil;
111 e060bc52 2005-08-11 devnull 	}
112 e060bc52 2005-08-11 devnull 	goto error;
113 0c98da8b 2005-07-13 devnull 
114 e060bc52 2005-08-11 devnull okay:
115 0c98da8b 2005-07-13 devnull 	fs->blocksize = fsblk->blocksize;
116 0c98da8b 2005-07-13 devnull 	fs->nblock = (fsblk->nfrag+fsblk->fragsperblock-1) / fsblk->fragsperblock;
117 0c98da8b 2005-07-13 devnull 	fs->fragsize = fsblk->fragsize;
118 0c98da8b 2005-07-13 devnull 	fs->fragspergroup = fsblk->fragspergroup;
119 0c98da8b 2005-07-13 devnull 	fs->fragsperblock = fsblk->fragsperblock;
120 0c98da8b 2005-07-13 devnull 	fs->inosperblock = fsblk->inosperblock;
121 0c98da8b 2005-07-13 devnull 	fs->inospergroup = fsblk->inospergroup;
122 0c98da8b 2005-07-13 devnull 
123 0c98da8b 2005-07-13 devnull 	fs->nfrag = fsblk->nfrag;
124 0c98da8b 2005-07-13 devnull 	fs->ndfrag = fsblk->ndfrag;
125 e060bc52 2005-08-11 devnull 	/*
126 e060bc52 2005-08-11 devnull 	 * used to use 
127 e060bc52 2005-08-11 devnull 	 *	fs->blockspergroup = (u64int)fsblk->_cylspergroup * 
128 e060bc52 2005-08-11 devnull 	 *		fsblk->secspercyl * BYTESPERSEC / fsblk->blocksize;
129 e060bc52 2005-08-11 devnull 	 * for UFS1, but this should work for both UFS1 and UFS2
130 e060bc52 2005-08-11 devnull 	 */
131 e060bc52 2005-08-11 devnull 	fs->blockspergroup = (u64int)fsblk->fragspergroup / fsblk->fragsperblock;
132 0c98da8b 2005-07-13 devnull 	fs->ncg = fsblk->ncg;
133 0c98da8b 2005-07-13 devnull 
134 0c98da8b 2005-07-13 devnull 	fsys->blocksize = fs->blocksize;
135 0c98da8b 2005-07-13 devnull 	fsys->nblock = fs->nblock;
136 0c98da8b 2005-07-13 devnull 
137 e060bc52 2005-08-11 devnull 	if(debug) fprint(2, "ffs %lld %d-byte blocks, %d cylinder groups\n",
138 0c98da8b 2005-07-13 devnull 		fs->nblock, fs->blocksize, fs->ncg);
139 e060bc52 2005-08-11 devnull 	if(debug) fprint(2, "\tinospergroup %d perblock %d blockspergroup %lld\n",
140 e060bc52 2005-08-11 devnull 		fs->inospergroup, fs->inosperblock, fs->blockspergroup);
141 0c98da8b 2005-07-13 devnull 
142 0c98da8b 2005-07-13 devnull 	if(fs->cg == nil)
143 0c98da8b 2005-07-13 devnull 		fs->cg = emalloc(fs->ncg*sizeof(Cylgrp));
144 0c98da8b 2005-07-13 devnull 	for(i=0; i<fs->ncg; i++){
145 0c98da8b 2005-07-13 devnull 		cg = &fs->cg[i];
146 e060bc52 2005-08-11 devnull 		if(fs->ufs == 2)
147 e060bc52 2005-08-11 devnull 			cg->bno = (u64int)fs->blockspergroup*i;
148 e060bc52 2005-08-11 devnull 		else
149 e060bc52 2005-08-11 devnull 			cg->bno = fs->blockspergroup*i + fsblk->_cgoffset * (i & ~fsblk->_cgmask);
150 0c98da8b 2005-07-13 devnull 		cg->cgblkno = cg->bno + fsblk->cfragno/fs->fragsperblock;
151 0c98da8b 2005-07-13 devnull 		cg->ibno = cg->bno + fsblk->ifragno/fs->fragsperblock;
152 0c98da8b 2005-07-13 devnull 		cg->dbno = cg->bno + fsblk->dfragno/fs->fragsperblock;
153 0c98da8b 2005-07-13 devnull 
154 0c98da8b 2005-07-13 devnull 		if(checkcg){
155 0c98da8b 2005-07-13 devnull 			if((cgb = diskread(disk, fs->blocksize, (u64int)cg->cgblkno*fs->blocksize)) == nil)
156 0c98da8b 2005-07-13 devnull 				goto error;
157 0c98da8b 2005-07-13 devnull 
158 0c98da8b 2005-07-13 devnull 			cgblk = (Cgblk*)cgb->data;
159 0c98da8b 2005-07-13 devnull 			if(checkcgblk(cgblk) < 0){
160 0c98da8b 2005-07-13 devnull 				blockput(cgb);
161 0c98da8b 2005-07-13 devnull 				goto error;
162 0c98da8b 2005-07-13 devnull 			}
163 0c98da8b 2005-07-13 devnull 			if(cgblk->nfrag % fs->fragsperblock && i != fs->ncg-1){
164 0c98da8b 2005-07-13 devnull 				werrstr("fractional number of blocks in non-last cylinder group %d", cgblk->nfrag);
165 0c98da8b 2005-07-13 devnull 				blockput(cgb);
166 0c98da8b 2005-07-13 devnull 				goto error;
167 0c98da8b 2005-07-13 devnull 			}
168 cbeb0b26 2006-04-01 devnull 			/* cg->nfrag = cgblk->nfrag; */
169 cbeb0b26 2006-04-01 devnull 			/* cg->nblock = (cgblk->nfrag+fs->fragsperblock-1) / fs->fragsperblock; */
170 cbeb0b26 2006-04-01 devnull 			/* fprint(2, "cg #%d: cgblk %lud, %d blocks, %d inodes\n", cgblk->num, (ulong)cg->cgblkno, cg->nblock, cg->nino); */
171 0c98da8b 2005-07-13 devnull 		}
172 0c98da8b 2005-07-13 devnull 	}
173 0c98da8b 2005-07-13 devnull 	blockput(b);
174 0c98da8b 2005-07-13 devnull 	return 0;
175 0c98da8b 2005-07-13 devnull 
176 0c98da8b 2005-07-13 devnull error:
177 0c98da8b 2005-07-13 devnull 	blockput(b);
178 0c98da8b 2005-07-13 devnull 	return -1;
179 0c98da8b 2005-07-13 devnull }
180 0c98da8b 2005-07-13 devnull 
181 0c98da8b 2005-07-13 devnull static void
182 0c98da8b 2005-07-13 devnull ffsclose(Fsys *fsys)
183 0c98da8b 2005-07-13 devnull {
184 0c98da8b 2005-07-13 devnull 	Ffs *fs;
185 0c98da8b 2005-07-13 devnull 
186 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
187 0c98da8b 2005-07-13 devnull 	if(fs->cg)
188 0c98da8b 2005-07-13 devnull 		free(fs->cg);
189 0c98da8b 2005-07-13 devnull 	free(fs);
190 0c98da8b 2005-07-13 devnull 	free(fsys);
191 0c98da8b 2005-07-13 devnull }
192 0c98da8b 2005-07-13 devnull 	
193 0c98da8b 2005-07-13 devnull static int
194 0c98da8b 2005-07-13 devnull checkfsblk(Fsblk *super)
195 0c98da8b 2005-07-13 devnull {
196 6802a899 2006-04-28 devnull // fprint(2, "ffs magic 0x%ux\n", super->magic);
197 e060bc52 2005-08-11 devnull 	if(super->magic == FSMAGIC){
198 e060bc52 2005-08-11 devnull 		super->time = super->_time;
199 e060bc52 2005-08-11 devnull 		super->nfrag = super->_nfrag;
200 e060bc52 2005-08-11 devnull 		super->ndfrag = super->_ndfrag;
201 e060bc52 2005-08-11 devnull 		super->flags = super->_flags;
202 e060bc52 2005-08-11 devnull 		return 1;
203 0c98da8b 2005-07-13 devnull 	}
204 e060bc52 2005-08-11 devnull 	if(super->magic == FSMAGIC2){
205 e060bc52 2005-08-11 devnull 		return 2;
206 e060bc52 2005-08-11 devnull 	}
207 0c98da8b 2005-07-13 devnull 
208 e060bc52 2005-08-11 devnull 	werrstr("bad super block");
209 e060bc52 2005-08-11 devnull 	return -1;
210 0c98da8b 2005-07-13 devnull }
211 0c98da8b 2005-07-13 devnull 
212 0c98da8b 2005-07-13 devnull static int
213 0c98da8b 2005-07-13 devnull checkcgblk(Cgblk *cg)
214 0c98da8b 2005-07-13 devnull {
215 0c98da8b 2005-07-13 devnull 	if(cg->magic != CGMAGIC){
216 0c98da8b 2005-07-13 devnull 		werrstr("bad cylinder group block");
217 0c98da8b 2005-07-13 devnull 		return -1;
218 0c98da8b 2005-07-13 devnull 	}
219 0c98da8b 2005-07-13 devnull 	return 0;
220 0c98da8b 2005-07-13 devnull }
221 0c98da8b 2005-07-13 devnull 
222 0c98da8b 2005-07-13 devnull /*
223 0c98da8b 2005-07-13 devnull  * Read block #bno from the disk, zeroing unused data.
224 0c98da8b 2005-07-13 devnull  * If there is no data whatsoever, it's okay to return nil.
225 0c98da8b 2005-07-13 devnull  */
226 0c98da8b 2005-07-13 devnull int nskipx;
227 0c98da8b 2005-07-13 devnull static Block*
228 0c98da8b 2005-07-13 devnull ffsblockread(Fsys *fsys, u64int bno)
229 0c98da8b 2005-07-13 devnull {
230 e060bc52 2005-08-11 devnull 	int i, o;
231 0c98da8b 2005-07-13 devnull 	u8int *fmap;
232 0c98da8b 2005-07-13 devnull 	int frag, fsize, avail;
233 0c98da8b 2005-07-13 devnull 	Block *b;
234 0c98da8b 2005-07-13 devnull 	Cgblk *cgblk;
235 0c98da8b 2005-07-13 devnull 	Ffs *fs;
236 0c98da8b 2005-07-13 devnull 
237 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
238 0c98da8b 2005-07-13 devnull 	i = bno / fs->blockspergroup;
239 0c98da8b 2005-07-13 devnull 	o = bno % fs->blockspergroup;
240 0c98da8b 2005-07-13 devnull 	if(i >= fs->ncg)
241 0c98da8b 2005-07-13 devnull 		return nil;
242 0c98da8b 2005-07-13 devnull 
243 0c98da8b 2005-07-13 devnull 	if((cgblk = ffscylgrp(fs, i, &b)) == nil)
244 0c98da8b 2005-07-13 devnull 		return nil;
245 0c98da8b 2005-07-13 devnull 
246 0c98da8b 2005-07-13 devnull 	fmap = (u8int*)cgblk+cgblk->fmapoff;
247 0c98da8b 2005-07-13 devnull 	frag = fs->fragsperblock;
248 0c98da8b 2005-07-13 devnull 	switch(frag){
249 0c98da8b 2005-07-13 devnull 	default:
250 0c98da8b 2005-07-13 devnull 		sysfatal("bad frag");
251 0c98da8b 2005-07-13 devnull 	case 8:
252 0c98da8b 2005-07-13 devnull 		avail = fmap[o];
253 0c98da8b 2005-07-13 devnull 		break;
254 0c98da8b 2005-07-13 devnull 	case 4:
255 0c98da8b 2005-07-13 devnull 		avail = (fmap[o>>1] >> ((o&1)*4)) & 0xF;
256 0c98da8b 2005-07-13 devnull 		break;
257 0c98da8b 2005-07-13 devnull 	case 2:
258 0c98da8b 2005-07-13 devnull 		avail = (fmap[o>>2] >> ((o&3)*2)) & 0x3;
259 0c98da8b 2005-07-13 devnull 		break;
260 0c98da8b 2005-07-13 devnull 	case 1:
261 0c98da8b 2005-07-13 devnull 		avail = (fmap[o>>3] >> (o&7)) & 0x1;
262 0c98da8b 2005-07-13 devnull 		break;
263 0c98da8b 2005-07-13 devnull 	}
264 0c98da8b 2005-07-13 devnull 	blockput(b);
265 0c98da8b 2005-07-13 devnull 
266 0c98da8b 2005-07-13 devnull 	if(avail == ((1<<frag)-1))
267 0c98da8b 2005-07-13 devnull {
268 0c98da8b 2005-07-13 devnull nskipx++;
269 0c98da8b 2005-07-13 devnull 		return nil;
270 0c98da8b 2005-07-13 devnull }
271 0c98da8b 2005-07-13 devnull 	if((b = diskread(fs->disk, fs->blocksize, bno*fs->blocksize)) == nil){
272 0c98da8b 2005-07-13 devnull 		fprint(2, "diskread failed!!!\n");
273 0c98da8b 2005-07-13 devnull 		return nil;
274 0c98da8b 2005-07-13 devnull 	}
275 0c98da8b 2005-07-13 devnull 
276 0c98da8b 2005-07-13 devnull 	fsize = fs->fragsize;
277 0c98da8b 2005-07-13 devnull 	for(i=0; i<frag; i++)
278 0c98da8b 2005-07-13 devnull 		if(avail & (1<<i))
279 0c98da8b 2005-07-13 devnull 			memset(b->data + fsize*i, 0, fsize);
280 0c98da8b 2005-07-13 devnull 	return b;
281 0c98da8b 2005-07-13 devnull }
282 0c98da8b 2005-07-13 devnull 
283 0c98da8b 2005-07-13 devnull static Block*
284 e060bc52 2005-08-11 devnull ffsdatablock(Ffs *fs, u64int bno, int size)
285 0c98da8b 2005-07-13 devnull {
286 0c98da8b 2005-07-13 devnull 	int fsize;
287 0c98da8b 2005-07-13 devnull 	u64int diskaddr;
288 0c98da8b 2005-07-13 devnull 	Block *b;
289 0c98da8b 2005-07-13 devnull 
290 0c98da8b 2005-07-13 devnull 	if(bno == 0)
291 0c98da8b 2005-07-13 devnull 		return nil;
292 0c98da8b 2005-07-13 devnull 
293 0c98da8b 2005-07-13 devnull 	fsize = size;
294 0c98da8b 2005-07-13 devnull 	if(fsize < fs->fragsize)
295 0c98da8b 2005-07-13 devnull 		fsize = fs->fragsize;
296 0c98da8b 2005-07-13 devnull 
297 0c98da8b 2005-07-13 devnull 	if(bno >= fs->nfrag){
298 9614b46f 2005-10-29 devnull 		fprint(2, "ffs: request for block %#lux; nfrag %#llux\n", (ulong)bno, fs->nfrag);
299 0c98da8b 2005-07-13 devnull 		return nil;
300 0c98da8b 2005-07-13 devnull 	}
301 0c98da8b 2005-07-13 devnull 	diskaddr = (u64int)bno*fs->fragsize;
302 0c98da8b 2005-07-13 devnull 	b = diskread(fs->disk, fsize, diskaddr);
303 0c98da8b 2005-07-13 devnull 	if(b == nil){
304 0c98da8b 2005-07-13 devnull 		fprint(2, "ffs: disk i/o at %#llux for %#ux: %r\n", diskaddr, fsize);
305 0c98da8b 2005-07-13 devnull 		return nil;
306 0c98da8b 2005-07-13 devnull 	}
307 0c98da8b 2005-07-13 devnull 	if(b->len < fsize){
308 0c98da8b 2005-07-13 devnull 		fprint(2, "ffs: disk i/o at %#llux for %#ux got %#ux\n", diskaddr, fsize,
309 0c98da8b 2005-07-13 devnull 			b->len);
310 0c98da8b 2005-07-13 devnull 		blockput(b);
311 0c98da8b 2005-07-13 devnull 		return nil;
312 0c98da8b 2005-07-13 devnull 	}
313 0c98da8b 2005-07-13 devnull 	
314 0c98da8b 2005-07-13 devnull 	return b;
315 0c98da8b 2005-07-13 devnull }
316 0c98da8b 2005-07-13 devnull 
317 e060bc52 2005-08-11 devnull static u64int
318 e060bc52 2005-08-11 devnull ifetch(Ffs *fs, u64int bno, u32int off)
319 9f4a65a0 2005-07-28 devnull {
320 9f4a65a0 2005-07-28 devnull 	Block *b;
321 9f4a65a0 2005-07-28 devnull 	
322 e060bc52 2005-08-11 devnull 	if(bno == BADBNO)
323 e060bc52 2005-08-11 devnull 		return BADBNO;
324 9f4a65a0 2005-07-28 devnull 	b = ffsdatablock(fs, bno, fs->blocksize);
325 9f4a65a0 2005-07-28 devnull 	if(b == nil)
326 e060bc52 2005-08-11 devnull 		return BADBNO;
327 e060bc52 2005-08-11 devnull 	if(fs->ufs == 2)
328 e060bc52 2005-08-11 devnull 		bno = ((u64int*)b->data)[off];
329 e060bc52 2005-08-11 devnull 	else
330 e060bc52 2005-08-11 devnull 		bno = ((u32int*)b->data)[off];
331 9f4a65a0 2005-07-28 devnull 	blockput(b);
332 9f4a65a0 2005-07-28 devnull 	return bno;
333 9f4a65a0 2005-07-28 devnull }
334 0c98da8b 2005-07-13 devnull 
335 e060bc52 2005-08-11 devnull static u64int
336 e060bc52 2005-08-11 devnull ffsfileblockno(Ffs *fs, Inode *ino, u64int bno)
337 9f4a65a0 2005-07-28 devnull {
338 9f4a65a0 2005-07-28 devnull 	int ppb;
339 9f4a65a0 2005-07-28 devnull 
340 0c98da8b 2005-07-13 devnull 	if(bno < NDADDR){
341 0c98da8b 2005-07-13 devnull 		if(debug) fprint(2, "ffsfileblock %lud: direct %#lux\n", (ulong)bno, (ulong)ino->db[bno]);
342 9f4a65a0 2005-07-28 devnull 		return ino->db[bno];
343 0c98da8b 2005-07-13 devnull 	}
344 0c98da8b 2005-07-13 devnull 	bno -= NDADDR;
345 0c98da8b 2005-07-13 devnull 	ppb = fs->blocksize/4;
346 0c98da8b 2005-07-13 devnull 
347 9f4a65a0 2005-07-28 devnull 	if(bno < ppb)	/* single indirect */
348 9f4a65a0 2005-07-28 devnull 		return ifetch(fs, ino->ib[0], bno);
349 9f4a65a0 2005-07-28 devnull 	bno -= ppb;
350 0c98da8b 2005-07-13 devnull 
351 9f4a65a0 2005-07-28 devnull 	if(bno < ppb*ppb)
352 9f4a65a0 2005-07-28 devnull 		return ifetch(fs, ifetch(fs, ino->ib[1], bno/ppb), bno%ppb);
353 9f4a65a0 2005-07-28 devnull 	bno -= ppb*ppb;
354 9f4a65a0 2005-07-28 devnull 	
355 9f4a65a0 2005-07-28 devnull 	if(bno/ppb/ppb/ppb == 0)	/* bno < ppb*ppb*ppb w/o overflow */
356 9f4a65a0 2005-07-28 devnull 		return ifetch(fs, ifetch(fs, ifetch(fs, ino->ib[2], bno/ppb/ppb), (bno/ppb)%ppb), bno%ppb);
357 9f4a65a0 2005-07-28 devnull 	
358 e060bc52 2005-08-11 devnull 	fprint(2, "ffsfileblock %llud: way too big\n", bno+NDADDR+ppb+ppb*ppb);
359 e060bc52 2005-08-11 devnull 	return BADBNO;
360 9f4a65a0 2005-07-28 devnull }
361 9f4a65a0 2005-07-28 devnull 
362 9f4a65a0 2005-07-28 devnull static Block*
363 e060bc52 2005-08-11 devnull ffsfileblock(Ffs *fs, Inode *ino, u64int bno, int size)
364 9f4a65a0 2005-07-28 devnull {
365 e060bc52 2005-08-11 devnull 	u64int b;
366 9f4a65a0 2005-07-28 devnull 	
367 9f4a65a0 2005-07-28 devnull 	b = ffsfileblockno(fs, ino, bno);
368 9f4a65a0 2005-07-28 devnull 	if(b == ~0)
369 9f4a65a0 2005-07-28 devnull 		return nil;
370 9f4a65a0 2005-07-28 devnull 	return ffsdatablock(fs, b, size);
371 0c98da8b 2005-07-13 devnull }
372 0c98da8b 2005-07-13 devnull 
373 0c98da8b 2005-07-13 devnull /*
374 0c98da8b 2005-07-13 devnull  * NFS handles are 4-byte inode number.
375 0c98da8b 2005-07-13 devnull  */
376 0c98da8b 2005-07-13 devnull static void
377 0c98da8b 2005-07-13 devnull mkhandle(Nfs3Handle *h, u64int ino)
378 0c98da8b 2005-07-13 devnull {
379 0c98da8b 2005-07-13 devnull 	h->h[0] = ino >> 24;
380 0c98da8b 2005-07-13 devnull 	h->h[1] = ino >> 16;
381 0c98da8b 2005-07-13 devnull 	h->h[2] = ino >> 8;
382 0c98da8b 2005-07-13 devnull 	h->h[3] = ino;
383 0c98da8b 2005-07-13 devnull 	h->len = 4;
384 0c98da8b 2005-07-13 devnull }
385 0c98da8b 2005-07-13 devnull 
386 0c98da8b 2005-07-13 devnull static u32int
387 0c98da8b 2005-07-13 devnull byte2u32(uchar *p)
388 0c98da8b 2005-07-13 devnull {
389 0c98da8b 2005-07-13 devnull 	return (p[0]<<24) | (p[1]<<16) | (p[2]<<8) | p[3];
390 0c98da8b 2005-07-13 devnull }
391 0c98da8b 2005-07-13 devnull 
392 e060bc52 2005-08-11 devnull static u64int lastiaddr;	/* debugging */
393 9f4a65a0 2005-07-28 devnull 
394 e060bc52 2005-08-11 devnull static void
395 e060bc52 2005-08-11 devnull inode1to2(Inode1 *i1, Inode *i2)
396 e060bc52 2005-08-11 devnull {
397 e060bc52 2005-08-11 devnull 	int i;
398 e060bc52 2005-08-11 devnull 	
399 e060bc52 2005-08-11 devnull 	memset(i2, 0, sizeof *i2);
400 e060bc52 2005-08-11 devnull 	i2->mode = i1->mode;
401 e060bc52 2005-08-11 devnull 	i2->nlink = i1->nlink;
402 e060bc52 2005-08-11 devnull 	i2->size = i1->size;
403 e060bc52 2005-08-11 devnull 	i2->atime = i1->atime;
404 e060bc52 2005-08-11 devnull 	i2->atimensec = i1->atimensec;
405 e060bc52 2005-08-11 devnull 	i2->mtime = i1->mtime;
406 e060bc52 2005-08-11 devnull 	i2->mtimensec = i1->mtimensec;
407 e060bc52 2005-08-11 devnull 	i2->ctime = i1->ctime;
408 e060bc52 2005-08-11 devnull 	i2->ctimensec = i1->ctimensec;
409 e060bc52 2005-08-11 devnull 	for(i=0; i<NDADDR; i++)
410 e060bc52 2005-08-11 devnull 		i2->db[i] = i1->db[i];
411 e060bc52 2005-08-11 devnull 	for(i=0; i<NIADDR; i++)
412 e060bc52 2005-08-11 devnull 		i2->ib[i] = i1->ib[i];
413 e060bc52 2005-08-11 devnull 	i2->flags = i1->flags;
414 e060bc52 2005-08-11 devnull 	i2->nblock = i1->nblock;
415 e060bc52 2005-08-11 devnull 	i2->gen = i1->gen;
416 e060bc52 2005-08-11 devnull 	i2->uid = i1->uid;
417 e060bc52 2005-08-11 devnull 	i2->gid = i1->gid;
418 e060bc52 2005-08-11 devnull }
419 e060bc52 2005-08-11 devnull 
420 0c98da8b 2005-07-13 devnull static Nfs3Status
421 0c98da8b 2005-07-13 devnull handle2ino(Ffs *fs, Nfs3Handle *h, u32int *pinum, Inode *ino)
422 0c98da8b 2005-07-13 devnull {
423 0c98da8b 2005-07-13 devnull 	int i;
424 0c98da8b 2005-07-13 devnull 	u32int ioff;
425 0c98da8b 2005-07-13 devnull 	u32int inum;
426 e060bc52 2005-08-11 devnull 	u64int iaddr;
427 0c98da8b 2005-07-13 devnull 	Block *b;
428 0c98da8b 2005-07-13 devnull 	Cylgrp *cg;
429 e060bc52 2005-08-11 devnull 	Inode1 ino1;
430 0c98da8b 2005-07-13 devnull 
431 0c98da8b 2005-07-13 devnull 	if(h->len != 4)
432 0c98da8b 2005-07-13 devnull 		return Nfs3ErrBadHandle;
433 0c98da8b 2005-07-13 devnull 	inum = byte2u32(h->h);
434 0c98da8b 2005-07-13 devnull 	if(pinum)
435 0c98da8b 2005-07-13 devnull 		*pinum = inum;
436 0c98da8b 2005-07-13 devnull 	if(debug) print("inum %d...", (int)inum);
437 0c98da8b 2005-07-13 devnull 
438 0c98da8b 2005-07-13 devnull 	/* fetch inode from disk */
439 0c98da8b 2005-07-13 devnull 	i = inum / fs->inospergroup;
440 0c98da8b 2005-07-13 devnull 	ioff = inum % fs->inospergroup;
441 0c98da8b 2005-07-13 devnull 	if(debug)print("cg %d off %d...", i, (int)ioff);
442 0c98da8b 2005-07-13 devnull 	if(i >= fs->ncg)
443 0c98da8b 2005-07-13 devnull 		return Nfs3ErrBadHandle;
444 0c98da8b 2005-07-13 devnull 	cg = &fs->cg[i];
445 0c98da8b 2005-07-13 devnull 
446 e060bc52 2005-08-11 devnull 	if(debug) print("cg->ibno %lld ufs %d...", cg->ibno, fs->ufs);
447 e060bc52 2005-08-11 devnull 	iaddr = (cg->ibno+ioff/fs->inosperblock)*(vlong)fs->blocksize;
448 e060bc52 2005-08-11 devnull 	ioff = ioff%fs->inosperblock;
449 e060bc52 2005-08-11 devnull 	if((b = diskread(fs->disk, fs->blocksize, iaddr)) == nil)
450 0c98da8b 2005-07-13 devnull 		return Nfs3ErrIo;
451 e060bc52 2005-08-11 devnull 	if(fs->ufs == 2){
452 e060bc52 2005-08-11 devnull 		*ino = ((Inode*)b->data)[ioff];
453 e060bc52 2005-08-11 devnull 		lastiaddr = iaddr+ioff*sizeof(Inode);
454 e060bc52 2005-08-11 devnull 	}else{
455 e060bc52 2005-08-11 devnull 		ino1 = ((Inode1*)b->data)[ioff];
456 e060bc52 2005-08-11 devnull 		inode1to2(&ino1, ino);
457 e060bc52 2005-08-11 devnull 		lastiaddr = iaddr+ioff*sizeof(Inode1);
458 e060bc52 2005-08-11 devnull 	}
459 0c98da8b 2005-07-13 devnull 	blockput(b);
460 0c98da8b 2005-07-13 devnull 	return Nfs3Ok;
461 0c98da8b 2005-07-13 devnull }
462 0c98da8b 2005-07-13 devnull 
463 0c98da8b 2005-07-13 devnull static Nfs3Status
464 0c98da8b 2005-07-13 devnull ffsroot(Fsys *fsys, Nfs3Handle *h)
465 0c98da8b 2005-07-13 devnull {
466 0c98da8b 2005-07-13 devnull 	USED(fsys);
467 0c98da8b 2005-07-13 devnull 	mkhandle(h, 2);
468 0c98da8b 2005-07-13 devnull 	return Nfs3Ok;
469 0c98da8b 2005-07-13 devnull }
470 0c98da8b 2005-07-13 devnull 
471 0c98da8b 2005-07-13 devnull static Nfs3Status
472 0c98da8b 2005-07-13 devnull ino2attr(Ffs *fs, Inode *ino, u32int inum, Nfs3Attr *attr)
473 0c98da8b 2005-07-13 devnull {
474 0c98da8b 2005-07-13 devnull 	u32int rdev;
475 0c98da8b 2005-07-13 devnull 
476 0c98da8b 2005-07-13 devnull 	attr->type = -1;
477 0c98da8b 2005-07-13 devnull 	switch(ino->mode&IFMT){
478 0c98da8b 2005-07-13 devnull 	case IFIFO:
479 0c98da8b 2005-07-13 devnull 		attr->type = Nfs3FileFifo;
480 0c98da8b 2005-07-13 devnull 		break;
481 0c98da8b 2005-07-13 devnull 	case IFCHR:
482 0c98da8b 2005-07-13 devnull 		attr->type = Nfs3FileChar;
483 0c98da8b 2005-07-13 devnull 		break;
484 0c98da8b 2005-07-13 devnull 	case IFDIR:
485 0c98da8b 2005-07-13 devnull 		attr->type = Nfs3FileDir;
486 0c98da8b 2005-07-13 devnull 		break;
487 0c98da8b 2005-07-13 devnull 	case IFBLK:
488 0c98da8b 2005-07-13 devnull 		attr->type = Nfs3FileBlock;
489 0c98da8b 2005-07-13 devnull 		break;
490 0c98da8b 2005-07-13 devnull 	case IFREG:
491 0c98da8b 2005-07-13 devnull 		attr->type = Nfs3FileReg;
492 0c98da8b 2005-07-13 devnull 		break;
493 0c98da8b 2005-07-13 devnull 	case IFLNK:
494 0c98da8b 2005-07-13 devnull 		attr->type = Nfs3FileSymlink;
495 0c98da8b 2005-07-13 devnull 		break;
496 0c98da8b 2005-07-13 devnull 	case IFSOCK:
497 0c98da8b 2005-07-13 devnull 		attr->type = Nfs3FileSocket;
498 0c98da8b 2005-07-13 devnull 		break;
499 0c98da8b 2005-07-13 devnull 	case IFWHT:
500 0c98da8b 2005-07-13 devnull 	default:
501 0c98da8b 2005-07-13 devnull 		return Nfs3ErrBadHandle;
502 0c98da8b 2005-07-13 devnull 	}
503 0c98da8b 2005-07-13 devnull 
504 0c98da8b 2005-07-13 devnull 	attr->mode = ino->mode&07777;
505 0c98da8b 2005-07-13 devnull 	attr->nlink = ino->nlink;
506 0c98da8b 2005-07-13 devnull 	attr->uid = ino->uid;
507 0c98da8b 2005-07-13 devnull 	attr->gid = ino->gid;
508 0c98da8b 2005-07-13 devnull 	attr->size = ino->size;
509 0c98da8b 2005-07-13 devnull 	attr->used = ino->nblock*fs->blocksize;
510 0c98da8b 2005-07-13 devnull 	if(attr->type==Nfs3FileBlock || attr->type==Nfs3FileChar){
511 0c98da8b 2005-07-13 devnull 		rdev = ino->db[0];
512 0c98da8b 2005-07-13 devnull 		attr->major = (rdev>>8)&0xFF;
513 0c98da8b 2005-07-13 devnull 		attr->minor = rdev & 0xFFFF00FF;
514 0c98da8b 2005-07-13 devnull 	}else{
515 0c98da8b 2005-07-13 devnull 		attr->major = 0;
516 0c98da8b 2005-07-13 devnull 		attr->minor = 0;
517 0c98da8b 2005-07-13 devnull 	}
518 0c98da8b 2005-07-13 devnull 	attr->fsid = 0;
519 0c98da8b 2005-07-13 devnull 	attr->fileid = inum;
520 0c98da8b 2005-07-13 devnull 	attr->atime.sec = ino->atime;
521 0c98da8b 2005-07-13 devnull 	attr->atime.nsec = ino->atimensec;
522 0c98da8b 2005-07-13 devnull 	attr->mtime.sec = ino->mtime;
523 0c98da8b 2005-07-13 devnull 	attr->mtime.nsec = ino->mtimensec;
524 0c98da8b 2005-07-13 devnull 	attr->ctime.sec = ino->ctime;
525 0c98da8b 2005-07-13 devnull 	attr->ctime.nsec = ino->ctimensec;
526 0c98da8b 2005-07-13 devnull 	return Nfs3Ok;
527 0c98da8b 2005-07-13 devnull }
528 0c98da8b 2005-07-13 devnull 
529 0c98da8b 2005-07-13 devnull static int
530 0c98da8b 2005-07-13 devnull ingroup(SunAuthUnix *au, uint gid)
531 0c98da8b 2005-07-13 devnull {
532 0c98da8b 2005-07-13 devnull 	int i;
533 0c98da8b 2005-07-13 devnull 
534 0c98da8b 2005-07-13 devnull 	for(i=0; i<au->ng; i++)
535 0c98da8b 2005-07-13 devnull 		if(au->g[i] == gid)
536 0c98da8b 2005-07-13 devnull 			return 1;
537 0c98da8b 2005-07-13 devnull 	return 0;
538 0c98da8b 2005-07-13 devnull }
539 0c98da8b 2005-07-13 devnull 
540 0c98da8b 2005-07-13 devnull static Nfs3Status
541 0c98da8b 2005-07-13 devnull inoperm(Inode *ino, SunAuthUnix *au, int need)
542 0c98da8b 2005-07-13 devnull {
543 0c98da8b 2005-07-13 devnull 	int have;
544 0c98da8b 2005-07-13 devnull 
545 9f4a65a0 2005-07-28 devnull 	if(au == nil)
546 9f4a65a0 2005-07-28 devnull 		return Nfs3Ok;
547 9f4a65a0 2005-07-28 devnull 
548 0c98da8b 2005-07-13 devnull 	have = ino->mode&0777;
549 0c98da8b 2005-07-13 devnull 	if(ino->uid == au->uid)
550 0c98da8b 2005-07-13 devnull 		have >>= 6;
551 0c98da8b 2005-07-13 devnull 	else if(ino->gid == au->gid || ingroup(au, ino->gid))
552 0c98da8b 2005-07-13 devnull 		have >>= 3;
553 0c98da8b 2005-07-13 devnull 
554 0c98da8b 2005-07-13 devnull 	if((have&need) != need)
555 0c98da8b 2005-07-13 devnull 		return Nfs3ErrNotOwner;	/* really EPERM */
556 0c98da8b 2005-07-13 devnull 	return Nfs3Ok;
557 0c98da8b 2005-07-13 devnull }
558 0c98da8b 2005-07-13 devnull 
559 0c98da8b 2005-07-13 devnull static Nfs3Status
560 0c98da8b 2005-07-13 devnull ffsgetattr(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, Nfs3Attr *attr)
561 0c98da8b 2005-07-13 devnull {
562 0c98da8b 2005-07-13 devnull 	Inode ino;
563 0c98da8b 2005-07-13 devnull 	u32int inum;
564 0c98da8b 2005-07-13 devnull 	Ffs *fs;
565 0c98da8b 2005-07-13 devnull 	Nfs3Status ok;
566 0c98da8b 2005-07-13 devnull 
567 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
568 0c98da8b 2005-07-13 devnull 	if((ok = handle2ino(fs, h, &inum, &ino)) != Nfs3Ok)
569 0c98da8b 2005-07-13 devnull 		return ok;
570 0c98da8b 2005-07-13 devnull 
571 0c98da8b 2005-07-13 devnull 	USED(au);	/* anyone can getattr */
572 0c98da8b 2005-07-13 devnull 
573 0c98da8b 2005-07-13 devnull 	return ino2attr(fs, &ino, inum, attr);
574 0c98da8b 2005-07-13 devnull }
575 0c98da8b 2005-07-13 devnull 
576 0c98da8b 2005-07-13 devnull static Nfs3Status
577 0c98da8b 2005-07-13 devnull ffsaccess(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int want, u32int *got, Nfs3Attr *attr)
578 0c98da8b 2005-07-13 devnull {
579 0c98da8b 2005-07-13 devnull 	int have;
580 0c98da8b 2005-07-13 devnull 	Inode ino;
581 0c98da8b 2005-07-13 devnull 	u32int inum;
582 0c98da8b 2005-07-13 devnull 	Ffs *fs;
583 0c98da8b 2005-07-13 devnull 	Nfs3Status ok;
584 0c98da8b 2005-07-13 devnull 
585 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
586 0c98da8b 2005-07-13 devnull 	if((ok = handle2ino(fs, h, &inum, &ino)) != Nfs3Ok)
587 0c98da8b 2005-07-13 devnull 		return ok;
588 0c98da8b 2005-07-13 devnull 
589 0c98da8b 2005-07-13 devnull 	have = ino.mode&0777;
590 0c98da8b 2005-07-13 devnull 	if(ino.uid == au->uid)
591 0c98da8b 2005-07-13 devnull 		have >>= 6;
592 0c98da8b 2005-07-13 devnull 	else if(ino.gid == au->gid || ingroup(au, ino.gid))
593 0c98da8b 2005-07-13 devnull 		have >>= 3;
594 0c98da8b 2005-07-13 devnull 
595 0c98da8b 2005-07-13 devnull 	*got = 0;
596 0c98da8b 2005-07-13 devnull 	if((want&Nfs3AccessRead) && (have&AREAD))
597 0c98da8b 2005-07-13 devnull 		*got |= Nfs3AccessRead;
598 0c98da8b 2005-07-13 devnull 	if((want&Nfs3AccessLookup) && (ino.mode&IFMT)==IFDIR && (have&AEXEC))
599 0c98da8b 2005-07-13 devnull 		*got |= Nfs3AccessLookup;
600 0c98da8b 2005-07-13 devnull 	if((want&Nfs3AccessExecute) && (ino.mode&IFMT)!=IFDIR && (have&AEXEC))
601 0c98da8b 2005-07-13 devnull 		*got |= Nfs3AccessExecute;
602 0c98da8b 2005-07-13 devnull 
603 0c98da8b 2005-07-13 devnull 	return ino2attr(fs, &ino, inum, attr);
604 0c98da8b 2005-07-13 devnull }
605 0c98da8b 2005-07-13 devnull 
606 0c98da8b 2005-07-13 devnull static Nfs3Status
607 0c98da8b 2005-07-13 devnull ffslookup(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, char *name, Nfs3Handle *nh)
608 0c98da8b 2005-07-13 devnull {
609 0c98da8b 2005-07-13 devnull 	u32int nblock;
610 0c98da8b 2005-07-13 devnull 	u32int i;
611 0c98da8b 2005-07-13 devnull 	uchar *p, *ep;
612 0c98da8b 2005-07-13 devnull 	Dirent *de;
613 0c98da8b 2005-07-13 devnull 	Inode ino;
614 0c98da8b 2005-07-13 devnull 	Block *b;
615 0c98da8b 2005-07-13 devnull 	Ffs *fs;
616 0c98da8b 2005-07-13 devnull 	Nfs3Status ok;
617 0c98da8b 2005-07-13 devnull 	int len, want;
618 0c98da8b 2005-07-13 devnull 
619 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
620 0c98da8b 2005-07-13 devnull 	if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok)
621 0c98da8b 2005-07-13 devnull 		return ok;
622 0c98da8b 2005-07-13 devnull 
623 0c98da8b 2005-07-13 devnull 	if((ino.mode&IFMT) != IFDIR)
624 0c98da8b 2005-07-13 devnull 		return Nfs3ErrNotDir;
625 0c98da8b 2005-07-13 devnull 
626 0c98da8b 2005-07-13 devnull 	if((ok = inoperm(&ino, au, AEXEC)) != Nfs3Ok)
627 0c98da8b 2005-07-13 devnull 		return ok;
628 0c98da8b 2005-07-13 devnull 
629 0c98da8b 2005-07-13 devnull 	len = strlen(name);
630 0c98da8b 2005-07-13 devnull 	nblock = (ino.size+fs->blocksize-1) / fs->blocksize;
631 0c98da8b 2005-07-13 devnull 	for(i=0; i<nblock; i++){
632 0c98da8b 2005-07-13 devnull 		if(i==nblock-1)
633 0c98da8b 2005-07-13 devnull 			want = ino.size % fs->blocksize;
634 0c98da8b 2005-07-13 devnull 		else
635 0c98da8b 2005-07-13 devnull 			want = fs->blocksize;
636 0c98da8b 2005-07-13 devnull 		b = ffsfileblock(fs, &ino, i, want);
637 0c98da8b 2005-07-13 devnull 		if(b == nil)
638 0c98da8b 2005-07-13 devnull 			continue;
639 0c98da8b 2005-07-13 devnull 		p = b->data;
640 0c98da8b 2005-07-13 devnull 		ep = p+b->len;
641 0c98da8b 2005-07-13 devnull 		while(p < ep){
642 0c98da8b 2005-07-13 devnull 			de = (Dirent*)p;
643 0c98da8b 2005-07-13 devnull 			if(de->reclen == 0){
644 0c98da8b 2005-07-13 devnull 				if(debug)
645 0c98da8b 2005-07-13 devnull 					fprint(2, "reclen 0 at offset %d of %d\n", (int)(p-b->data), b->len);
646 0c98da8b 2005-07-13 devnull 				break;
647 0c98da8b 2005-07-13 devnull 			}
648 0c98da8b 2005-07-13 devnull 			p += de->reclen;
649 0c98da8b 2005-07-13 devnull 			if(p > ep){
650 0c98da8b 2005-07-13 devnull 				if(debug)
651 0c98da8b 2005-07-13 devnull 					fprint(2, "bad len %d at offset %d of %d\n", de->reclen, (int)(p-b->data), b->len);
652 0c98da8b 2005-07-13 devnull 				break;
653 0c98da8b 2005-07-13 devnull 			}
654 0c98da8b 2005-07-13 devnull 			if(de->ino == 0)
655 0c98da8b 2005-07-13 devnull 				continue;
656 0c98da8b 2005-07-13 devnull 			if(4+2+2+de->namlen > de->reclen){
657 0c98da8b 2005-07-13 devnull 				if(debug)
658 0c98da8b 2005-07-13 devnull 					fprint(2, "bad namelen %d at offset %d of %d\n", de->namlen, (int)(p-b->data), b->len);
659 0c98da8b 2005-07-13 devnull 				break;
660 0c98da8b 2005-07-13 devnull 			}
661 0c98da8b 2005-07-13 devnull 			if(de->namlen == len && memcmp(de->name, name, len) == 0){
662 0c98da8b 2005-07-13 devnull 				mkhandle(nh, de->ino);
663 0c98da8b 2005-07-13 devnull 				blockput(b);
664 0c98da8b 2005-07-13 devnull 				return Nfs3Ok;
665 0c98da8b 2005-07-13 devnull 			}
666 0c98da8b 2005-07-13 devnull 		}
667 0c98da8b 2005-07-13 devnull 		blockput(b);
668 0c98da8b 2005-07-13 devnull 	}
669 0c98da8b 2005-07-13 devnull 	return Nfs3ErrNoEnt;
670 0c98da8b 2005-07-13 devnull }
671 0c98da8b 2005-07-13 devnull 
672 0c98da8b 2005-07-13 devnull static Nfs3Status
673 0c98da8b 2005-07-13 devnull ffsreaddir(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int count, u64int cookie, uchar **pdata, u32int *pcount, u1int *peof)
674 0c98da8b 2005-07-13 devnull {
675 0c98da8b 2005-07-13 devnull 	u32int nblock;
676 0c98da8b 2005-07-13 devnull 	u32int i;
677 0c98da8b 2005-07-13 devnull 	int off, done;
678 0c98da8b 2005-07-13 devnull 	uchar *data, *dp, *dep, *p, *ep, *ndp;
679 0c98da8b 2005-07-13 devnull 	Dirent *de;
680 0c98da8b 2005-07-13 devnull 	Inode ino;
681 0c98da8b 2005-07-13 devnull 	Block *b;
682 0c98da8b 2005-07-13 devnull 	Ffs *fs;
683 0c98da8b 2005-07-13 devnull 	Nfs3Status ok;
684 0c98da8b 2005-07-13 devnull 	Nfs3Entry e;
685 0c98da8b 2005-07-13 devnull 	int want;
686 0c98da8b 2005-07-13 devnull 
687 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
688 0c98da8b 2005-07-13 devnull 	if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok)
689 0c98da8b 2005-07-13 devnull 		return ok;
690 0c98da8b 2005-07-13 devnull 
691 0c98da8b 2005-07-13 devnull 	if((ino.mode&IFMT) != IFDIR)
692 0c98da8b 2005-07-13 devnull 		return Nfs3ErrNotDir;
693 0c98da8b 2005-07-13 devnull 
694 0c98da8b 2005-07-13 devnull 	if((ok = inoperm(&ino, au, AREAD)) != Nfs3Ok)
695 0c98da8b 2005-07-13 devnull 		return ok;
696 0c98da8b 2005-07-13 devnull 
697 0c98da8b 2005-07-13 devnull 	if(cookie >= ino.size){
698 0c98da8b 2005-07-13 devnull 		*pcount = 0;
699 0c98da8b 2005-07-13 devnull 		*pdata = 0;
700 0c98da8b 2005-07-13 devnull 		return Nfs3Ok;
701 0c98da8b 2005-07-13 devnull 	}
702 0c98da8b 2005-07-13 devnull 
703 0c98da8b 2005-07-13 devnull 	dp = malloc(count);
704 0c98da8b 2005-07-13 devnull 	data = dp;
705 0c98da8b 2005-07-13 devnull 	if(dp == nil)
706 0c98da8b 2005-07-13 devnull 		return Nfs3ErrNoMem;
707 0c98da8b 2005-07-13 devnull 	dep = dp+count;
708 0c98da8b 2005-07-13 devnull 	*peof = 0;
709 0c98da8b 2005-07-13 devnull 	nblock = (ino.size+fs->blocksize-1) / fs->blocksize;
710 0c98da8b 2005-07-13 devnull 	i = cookie/fs->blocksize;
711 0c98da8b 2005-07-13 devnull 	off = cookie%fs->blocksize;
712 0c98da8b 2005-07-13 devnull 	done = 0;
713 0c98da8b 2005-07-13 devnull 	for(; i<nblock && !done; i++){
714 0c98da8b 2005-07-13 devnull 		if(i==nblock-1)
715 0c98da8b 2005-07-13 devnull 			want = ino.size % fs->blocksize;
716 0c98da8b 2005-07-13 devnull 		else
717 0c98da8b 2005-07-13 devnull 			want = fs->blocksize;
718 0c98da8b 2005-07-13 devnull 		b = ffsfileblock(fs, &ino, i, want);
719 0c98da8b 2005-07-13 devnull 		if(b == nil)
720 0c98da8b 2005-07-13 devnull 			continue;
721 0c98da8b 2005-07-13 devnull 		p = b->data;
722 0c98da8b 2005-07-13 devnull 		ep = p+b->len;
723 0c98da8b 2005-07-13 devnull 		memset(&e, 0, sizeof e);
724 0c98da8b 2005-07-13 devnull 		while(p < ep){
725 0c98da8b 2005-07-13 devnull 			de = (Dirent*)p;
726 0c98da8b 2005-07-13 devnull 			if(de->reclen == 0){
727 0c98da8b 2005-07-13 devnull 				if(debug) fprint(2, "reclen 0 at offset %d of %d\n", (int)(p-b->data), b->len);
728 0c98da8b 2005-07-13 devnull 				break;
729 0c98da8b 2005-07-13 devnull 			}
730 0c98da8b 2005-07-13 devnull 			p += de->reclen;
731 0c98da8b 2005-07-13 devnull 			if(p > ep){
732 0c98da8b 2005-07-13 devnull 				if(debug) fprint(2, "reclen %d at offset %d of %d\n", de->reclen, (int)(p-b->data), b->len);
733 0c98da8b 2005-07-13 devnull 				break;
734 0c98da8b 2005-07-13 devnull 			}
735 0c98da8b 2005-07-13 devnull 			if(de->ino == 0){
736 0c98da8b 2005-07-13 devnull 				if(debug) fprint(2, "zero inode\n");
737 0c98da8b 2005-07-13 devnull 				continue;
738 0c98da8b 2005-07-13 devnull 			}
739 0c98da8b 2005-07-13 devnull 			if(4+2+2+de->namlen > de->reclen){
740 0c98da8b 2005-07-13 devnull 				if(debug) fprint(2, "bad namlen %d reclen %d at offset %d of %d\n", de->namlen, de->reclen, (int)(p-b->data), b->len);
741 0c98da8b 2005-07-13 devnull 				break;
742 0c98da8b 2005-07-13 devnull 			}
743 0c98da8b 2005-07-13 devnull 			if(de->name[de->namlen] != 0){
744 0c98da8b 2005-07-13 devnull 				if(debug) fprint(2, "bad name %d %.*s\n", de->namlen, de->namlen, de->name);
745 0c98da8b 2005-07-13 devnull 				continue;
746 0c98da8b 2005-07-13 devnull 			}
747 0c98da8b 2005-07-13 devnull 			if(debug) print("%s/%d ", de->name, (int)de->ino);
748 0c98da8b 2005-07-13 devnull 			if((uchar*)de - b->data < off)
749 0c98da8b 2005-07-13 devnull 				continue;
750 0c98da8b 2005-07-13 devnull 			e.fileid = de->ino;
751 0c98da8b 2005-07-13 devnull 			e.name = de->name;
752 4e81d4f6 2006-05-09 devnull 			e.namelen = de->namlen;
753 0c98da8b 2005-07-13 devnull 			e.cookie = (u64int)i*fs->blocksize + (p - b->data);
754 0c98da8b 2005-07-13 devnull 			if(nfs3entrypack(dp, dep, &ndp, &e) < 0){
755 0c98da8b 2005-07-13 devnull 				done = 1;
756 0c98da8b 2005-07-13 devnull 				break;
757 0c98da8b 2005-07-13 devnull 			}
758 0c98da8b 2005-07-13 devnull 			dp = ndp;
759 0c98da8b 2005-07-13 devnull 		}
760 0c98da8b 2005-07-13 devnull 		off = 0;
761 0c98da8b 2005-07-13 devnull 		blockput(b);
762 0c98da8b 2005-07-13 devnull 	}
763 0c98da8b 2005-07-13 devnull 	if(i==nblock)
764 0c98da8b 2005-07-13 devnull 		*peof = 1;
765 0c98da8b 2005-07-13 devnull 
766 0c98da8b 2005-07-13 devnull 	*pcount = dp - data;
767 0c98da8b 2005-07-13 devnull 	*pdata = data;
768 0c98da8b 2005-07-13 devnull 	return Nfs3Ok;
769 9f4a65a0 2005-07-28 devnull }
770 9f4a65a0 2005-07-28 devnull 
771 9f4a65a0 2005-07-28 devnull static u64int
772 9f4a65a0 2005-07-28 devnull ffsxfileblock(Fsys *fsys, Nfs3Handle *h, u64int offset)
773 9f4a65a0 2005-07-28 devnull {
774 e060bc52 2005-08-11 devnull 	u64int bno;
775 9f4a65a0 2005-07-28 devnull 	Inode ino;
776 9f4a65a0 2005-07-28 devnull 	Nfs3Status ok;
777 9f4a65a0 2005-07-28 devnull 	Ffs *fs;
778 9f4a65a0 2005-07-28 devnull 	
779 9f4a65a0 2005-07-28 devnull 	fs = fsys->priv;
780 9f4a65a0 2005-07-28 devnull 	if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok){
781 9f4a65a0 2005-07-28 devnull 		nfs3errstr(ok);
782 9f4a65a0 2005-07-28 devnull 		return 0;
783 9f4a65a0 2005-07-28 devnull 	}
784 e060bc52 2005-08-11 devnull 	if(offset == 1)	/* clumsy hack for debugging */
785 e060bc52 2005-08-11 devnull 		return lastiaddr;
786 9f4a65a0 2005-07-28 devnull 	if(offset >= ino.size){
787 9f4a65a0 2005-07-28 devnull 		werrstr("beyond end of file");
788 9f4a65a0 2005-07-28 devnull 		return 0;
789 9f4a65a0 2005-07-28 devnull 	}
790 9f4a65a0 2005-07-28 devnull 	bno = offset/fs->blocksize;
791 9f4a65a0 2005-07-28 devnull 	bno = ffsfileblockno(fs, &ino, bno);
792 9f4a65a0 2005-07-28 devnull 	if(bno == ~0)
793 9f4a65a0 2005-07-28 devnull 		return 0;
794 9f4a65a0 2005-07-28 devnull 	return bno*(u64int)fs->fragsize;
795 0c98da8b 2005-07-13 devnull }
796 0c98da8b 2005-07-13 devnull 
797 0c98da8b 2005-07-13 devnull static Nfs3Status
798 0c98da8b 2005-07-13 devnull ffsreadfile(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int count,
799 0c98da8b 2005-07-13 devnull 	u64int offset, uchar **pdata, u32int *pcount, u1int *peof)
800 0c98da8b 2005-07-13 devnull {
801 0c98da8b 2005-07-13 devnull 	uchar *data;
802 0c98da8b 2005-07-13 devnull 	Block *b;
803 0c98da8b 2005-07-13 devnull 	Ffs *fs;
804 0c98da8b 2005-07-13 devnull 	int off, want, fragcount;
805 0c98da8b 2005-07-13 devnull 	Inode ino;
806 0c98da8b 2005-07-13 devnull 	Nfs3Status ok;
807 0c98da8b 2005-07-13 devnull 
808 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
809 0c98da8b 2005-07-13 devnull 	if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok)
810 0c98da8b 2005-07-13 devnull 		return ok;
811 0c98da8b 2005-07-13 devnull 
812 0c98da8b 2005-07-13 devnull 	if((ok = inoperm(&ino, au, AREAD)) != Nfs3Ok)
813 0c98da8b 2005-07-13 devnull 		return ok;
814 0c98da8b 2005-07-13 devnull 
815 0c98da8b 2005-07-13 devnull 	if(offset >= ino.size){
816 0c98da8b 2005-07-13 devnull 		*pdata = 0;
817 0c98da8b 2005-07-13 devnull 		*pcount = 0;
818 0c98da8b 2005-07-13 devnull 		*peof = 1;
819 0c98da8b 2005-07-13 devnull 		return Nfs3Ok;
820 0c98da8b 2005-07-13 devnull 	}
821 0c98da8b 2005-07-13 devnull 	if(offset+count > ino.size)
822 0c98da8b 2005-07-13 devnull 		count = ino.size-offset;
823 0c98da8b 2005-07-13 devnull 	if(offset/fs->blocksize != (offset+count-1)/fs->blocksize)
824 0c98da8b 2005-07-13 devnull 		count = fs->blocksize - offset%fs->blocksize;
825 0c98da8b 2005-07-13 devnull 
826 0c98da8b 2005-07-13 devnull 	data = malloc(count);
827 0c98da8b 2005-07-13 devnull 	if(data == nil)
828 0c98da8b 2005-07-13 devnull 		return Nfs3ErrNoMem;
829 0c98da8b 2005-07-13 devnull 
830 0c98da8b 2005-07-13 devnull 	want = offset%fs->blocksize+count;
831 0c98da8b 2005-07-13 devnull 	if(want%fs->fragsize)
832 0c98da8b 2005-07-13 devnull 		want += fs->fragsize - want%fs->fragsize;
833 0c98da8b 2005-07-13 devnull 
834 0c98da8b 2005-07-13 devnull 	b = ffsfileblock(fs, &ino, offset/fs->blocksize, want);
835 0c98da8b 2005-07-13 devnull 	if(b == nil){
836 0c98da8b 2005-07-13 devnull 		/* BUG: distinguish sparse file from I/O error */
837 0c98da8b 2005-07-13 devnull 		memset(data, 0, count);
838 0c98da8b 2005-07-13 devnull 	}else{
839 0c98da8b 2005-07-13 devnull 		off = offset%fs->blocksize;
840 0c98da8b 2005-07-13 devnull 		fragcount = count;	/* need signed variable */
841 0c98da8b 2005-07-13 devnull 		if(off+fragcount > b->len){
842 0c98da8b 2005-07-13 devnull 			fragcount = b->len - off;
843 0c98da8b 2005-07-13 devnull 			if(fragcount < 0)
844 0c98da8b 2005-07-13 devnull 				fragcount = 0;
845 0c98da8b 2005-07-13 devnull 		}
846 0c98da8b 2005-07-13 devnull 		if(fragcount > 0)
847 0c98da8b 2005-07-13 devnull 			memmove(data, b->data+off, fragcount);
848 0c98da8b 2005-07-13 devnull 		count = fragcount;
849 0c98da8b 2005-07-13 devnull 		blockput(b);
850 0c98da8b 2005-07-13 devnull 	}
851 0c98da8b 2005-07-13 devnull 	*peof = (offset+count == ino.size);
852 0c98da8b 2005-07-13 devnull 	*pcount = count;
853 0c98da8b 2005-07-13 devnull 	*pdata = data;
854 0c98da8b 2005-07-13 devnull 	return Nfs3Ok;
855 0c98da8b 2005-07-13 devnull }
856 0c98da8b 2005-07-13 devnull 
857 0c98da8b 2005-07-13 devnull static Nfs3Status
858 0c98da8b 2005-07-13 devnull ffsreadlink(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, char **link)
859 0c98da8b 2005-07-13 devnull {
860 0c98da8b 2005-07-13 devnull 	Ffs *fs;
861 0c98da8b 2005-07-13 devnull 	Nfs3Status ok;
862 0c98da8b 2005-07-13 devnull 	int len;
863 0c98da8b 2005-07-13 devnull 	Inode ino;
864 0c98da8b 2005-07-13 devnull 	Block *b;
865 0c98da8b 2005-07-13 devnull 
866 0c98da8b 2005-07-13 devnull 	fs = fsys->priv;
867 0c98da8b 2005-07-13 devnull 	if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok)
868 0c98da8b 2005-07-13 devnull 		return ok;
869 0c98da8b 2005-07-13 devnull 	if((ok = inoperm(&ino, au, AREAD)) != Nfs3Ok)
870 0c98da8b 2005-07-13 devnull 		return ok;
871 0c98da8b 2005-07-13 devnull 
872 0c98da8b 2005-07-13 devnull 	if(ino.size > 1024)
873 0c98da8b 2005-07-13 devnull 		return Nfs3ErrIo;
874 0c98da8b 2005-07-13 devnull 	len = ino.size;
875 0c98da8b 2005-07-13 devnull 
876 0c98da8b 2005-07-13 devnull 	if(ino.nblock != 0){
877 e060bc52 2005-08-11 devnull 		/* assumes symlink fits in one block */
878 0c98da8b 2005-07-13 devnull 		b = ffsfileblock(fs, &ino, 0, len);
879 0c98da8b 2005-07-13 devnull 		if(b == nil)
880 0c98da8b 2005-07-13 devnull 			return Nfs3ErrIo;
881 0c98da8b 2005-07-13 devnull 		if(memchr(b->data, 0, len) != nil){
882 0c98da8b 2005-07-13 devnull 			blockput(b);
883 0c98da8b 2005-07-13 devnull 			return Nfs3ErrIo;
884 0c98da8b 2005-07-13 devnull 		}
885 0c98da8b 2005-07-13 devnull 		*link = malloc(len+1);
886 0c98da8b 2005-07-13 devnull 		if(*link == 0){
887 0c98da8b 2005-07-13 devnull 			blockput(b);
888 0c98da8b 2005-07-13 devnull 			return Nfs3ErrNoMem;
889 0c98da8b 2005-07-13 devnull 		}
890 0c98da8b 2005-07-13 devnull 		memmove(*link, b->data, len);
891 0c98da8b 2005-07-13 devnull 		(*link)[len] = 0;
892 0c98da8b 2005-07-13 devnull 		blockput(b);
893 0c98da8b 2005-07-13 devnull 		return Nfs3Ok;
894 0c98da8b 2005-07-13 devnull 	}
895 0c98da8b 2005-07-13 devnull 
896 0c98da8b 2005-07-13 devnull 	if(len > sizeof ino.db + sizeof ino.ib)
897 0c98da8b 2005-07-13 devnull 		return Nfs3ErrIo;
898 0c98da8b 2005-07-13 devnull 
899 0c98da8b 2005-07-13 devnull 	*link = malloc(len+1);
900 0c98da8b 2005-07-13 devnull 	if(*link == 0)
901 0c98da8b 2005-07-13 devnull 		return Nfs3ErrNoMem;
902 0c98da8b 2005-07-13 devnull 	memmove(*link, ino.db, ino.size);
903 0c98da8b 2005-07-13 devnull 	(*link)[len] = 0;
904 0c98da8b 2005-07-13 devnull 	return Nfs3Ok;
905 0c98da8b 2005-07-13 devnull }