Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/i386/linux/linux_stats.c
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1 /*- 2 * Copyright (c) 1994-1995 Søren Schmidt 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software withough specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/dirent.h> 34 #include <sys/file.h> 35 #include <sys/filedesc.h> 36 #include <sys/proc.h> 37 #include <sys/mount.h> 38 #include <sys/namei.h> 39 #include <sys/socketvar.h> 40 #include <sys/stat.h> 41 #include <sys/vnode.h> 42 #include <sys/pipe.h> 43 44 #include <i386/linux/linux.h> 45 #include <i386/linux/linux_proto.h> 46 #include <i386/linux/linux_util.h> 47 48 struct linux_newstat { 49 unsigned short stat_dev; 50 unsigned short __pad1; 51 unsigned long stat_ino; 52 unsigned short stat_mode; 53 unsigned short stat_nlink; 54 unsigned short stat_uid; 55 unsigned short stat_gid; 56 unsigned short stat_rdev; 57 unsigned short __pad2; 58 unsigned long stat_size; 59 unsigned long stat_blksize; 60 unsigned long stat_blocks; 61 unsigned long stat_atime; 62 unsigned long __unused1; 63 unsigned long stat_mtime; 64 unsigned long __unused2; 65 unsigned long stat_ctime; 66 unsigned long __unused3; 67 unsigned long __unused4; 68 unsigned long __unused5; 69 }; 70 71 struct linux_ustat 72 { 73 int f_tfree; 74 u_long f_tinode; 75 char f_fname[6]; 76 char f_fpack[6]; 77 }; 78 79 static int 80 newstat_copyout(struct stat *buf, void *ubuf) 81 { 82 struct linux_newstat tbuf; 83 84 tbuf.stat_dev = minor(buf->st_dev) | (major(buf->st_dev) << 8); 85 tbuf.stat_ino = buf->st_ino; 86 tbuf.stat_mode = buf->st_mode; 87 tbuf.stat_nlink = buf->st_nlink; 88 tbuf.stat_uid = buf->st_uid; 89 tbuf.stat_gid = buf->st_gid; 90 tbuf.stat_rdev = buf->st_rdev; 91 tbuf.stat_size = buf->st_size; 92 tbuf.stat_atime = buf->st_atime; 93 tbuf.stat_mtime = buf->st_mtime; 94 tbuf.stat_ctime = buf->st_ctime; 95 tbuf.stat_blksize = buf->st_blksize; 96 tbuf.stat_blocks = buf->st_blocks; 97 98 return copyout(&tbuf, ubuf, sizeof(tbuf)); 99 } 100 101 int 102 linux_newstat(struct proc *p, struct linux_newstat_args *args) 103 { 104 struct stat buf; 105 struct nameidata nd; 106 int error; 107 caddr_t sg; 108 109 sg = stackgap_init(); 110 CHECKALTEXIST(p, &sg, args->path); 111 112 #ifdef DEBUG 113 printf("Linux-emul(%ld): newstat(%s, *)\n", (long)p->p_pid, 114 args->path); 115 #endif 116 117 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE, 118 args->path, p); 119 error = namei(&nd); 120 if (error) 121 return (error); 122 123 error = vn_stat(nd.ni_vp, &buf, p); 124 vput(nd.ni_vp); 125 if (error) 126 return (error); 127 128 return (newstat_copyout(&buf, args->buf)); 129 } 130 131 /* 132 * Get file status; this version does not follow links. 133 */ 134 int 135 linux_newlstat(p, uap) 136 struct proc *p; 137 struct linux_newlstat_args *uap; 138 { 139 int error; 140 struct vnode *vp; 141 struct stat sb; 142 struct nameidata nd; 143 caddr_t sg; 144 145 sg = stackgap_init(); 146 CHECKALTEXIST(p, &sg, uap->path); 147 148 #ifdef DEBUG 149 printf("Linux-emul(%ld): newlstat(%s, *)\n", (long)p->p_pid, 150 uap->path); 151 #endif 152 153 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE, 154 uap->path, p); 155 error = namei(&nd); 156 if (error) 157 return (error); 158 159 vp = nd.ni_vp; 160 error = vn_stat(vp, &sb, p); 161 vput(vp); 162 if (error) 163 return (error); 164 165 return (newstat_copyout(&sb, uap->buf)); 166 } 167 168 int 169 linux_newfstat(struct proc *p, struct linux_newfstat_args *args) 170 { 171 struct filedesc *fdp = p->p_fd; 172 struct file *fp; 173 struct stat buf; 174 int error; 175 176 #ifdef DEBUG 177 printf("Linux-emul(%d): newfstat(%d, *)\n", p->p_pid, args->fd); 178 #endif 179 if ((unsigned)args->fd >= fdp->fd_nfiles 180 || (fp = fdp->fd_ofiles[args->fd]) == NULL) 181 return EBADF; 182 switch (fp->f_type) { 183 case DTYPE_FIFO: 184 case DTYPE_VNODE: 185 error = vn_stat((struct vnode *)fp->f_data, &buf, p); 186 break; 187 case DTYPE_SOCKET: 188 error = soo_stat((struct socket *)fp->f_data, &buf); 189 break; 190 case DTYPE_PIPE: 191 error = pipe_stat((struct pipe *)fp->f_data, &buf); 192 break; 193 default: 194 panic("LINUX newfstat"); 195 } 196 if (!error) 197 error = newstat_copyout(&buf, args->buf); 198 return error; 199 } 200 201 struct linux_statfs_buf { 202 long ftype; 203 long fbsize; 204 long fblocks; 205 long fbfree; 206 long fbavail; 207 long ffiles; 208 long fffree; 209 linux_fsid_t ffsid; 210 long fnamelen; 211 long fspare[6]; 212 }; 213 214 int 215 linux_statfs(struct proc *p, struct linux_statfs_args *args) 216 { 217 struct mount *mp; 218 struct nameidata *ndp; 219 struct statfs *bsd_statfs; 220 struct nameidata nd; 221 struct linux_statfs_buf linux_statfs_buf; 222 int error; 223 caddr_t sg; 224 225 sg = stackgap_init(); 226 CHECKALTEXIST(p, &sg, args->path); 227 228 #ifdef DEBUG 229 printf("Linux-emul(%d): statfs(%s, *)\n", p->p_pid, args->path); 230 #endif 231 ndp = &nd; 232 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args->path, curproc); 233 if (error = namei(ndp)) 234 return error; 235 mp = ndp->ni_vp->v_mount; 236 bsd_statfs = &mp->mnt_stat; 237 vrele(ndp->ni_vp); 238 if (error = VFS_STATFS(mp, bsd_statfs, p)) 239 return error; 240 bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; 241 linux_statfs_buf.ftype = bsd_statfs->f_type; 242 linux_statfs_buf.fbsize = bsd_statfs->f_bsize; 243 linux_statfs_buf.fblocks = bsd_statfs->f_blocks; 244 linux_statfs_buf.fbfree = bsd_statfs->f_bfree; 245 linux_statfs_buf.fbavail = bsd_statfs->f_bavail; 246 linux_statfs_buf.fffree = bsd_statfs->f_ffree; 247 linux_statfs_buf.ffiles = bsd_statfs->f_files; 248 linux_statfs_buf.ffsid.val[0] = bsd_statfs->f_fsid.val[0]; 249 linux_statfs_buf.ffsid.val[1] = bsd_statfs->f_fsid.val[1]; 250 linux_statfs_buf.fnamelen = MAXNAMLEN; 251 return copyout((caddr_t)&linux_statfs_buf, (caddr_t)args->buf, 252 sizeof(struct linux_statfs_buf)); 253 } 254 255 int 256 linux_fstatfs(struct proc *p, struct linux_fstatfs_args *args) 257 { 258 struct file *fp; 259 struct mount *mp; 260 struct statfs *bsd_statfs; 261 struct linux_statfs_buf linux_statfs_buf; 262 int error; 263 264 #ifdef DEBUG 265 printf("Linux-emul(%d): fstatfs(%d, *)\n", p->p_pid, args->fd); 266 #endif 267 if (error = getvnode(p->p_fd, args->fd, &fp)) 268 return error; 269 mp = ((struct vnode *)fp->f_data)->v_mount; 270 bsd_statfs = &mp->mnt_stat; 271 if (error = VFS_STATFS(mp, bsd_statfs, p)) 272 return error; 273 bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; 274 linux_statfs_buf.ftype = bsd_statfs->f_type; 275 linux_statfs_buf.fbsize = bsd_statfs->f_bsize; 276 linux_statfs_buf.fblocks = bsd_statfs->f_blocks; 277 linux_statfs_buf.fbfree = bsd_statfs->f_bfree; 278 linux_statfs_buf.fbavail = bsd_statfs->f_bavail; 279 linux_statfs_buf.fffree = bsd_statfs->f_ffree; 280 linux_statfs_buf.ffiles = bsd_statfs->f_files; 281 linux_statfs_buf.ffsid.val[0] = bsd_statfs->f_fsid.val[0]; 282 linux_statfs_buf.ffsid.val[1] = bsd_statfs->f_fsid.val[1]; 283 linux_statfs_buf.fnamelen = MAXNAMLEN; 284 return copyout((caddr_t)&linux_statfs_buf, (caddr_t)args->buf, 285 sizeof(struct linux_statfs_buf)); 286 } 287 288 int 289 linux_ustat(p, uap) 290 struct proc *p; 291 struct linux_ustat_args *uap; 292 { 293 struct linux_ustat lu; 294 dev_t dev; 295 struct vnode *vp; 296 struct statfs *stat; 297 int error; 298 299 #ifdef DEBUG 300 printf("Linux-emul(%ld): ustat(%d, *)\n", (long)p->p_pid, uap->dev); 301 #endif 302 303 /* 304 * lu.f_fname and lu.f_fpack are not used. They are always zeroed. 305 * lu.f_tinode and lu.f_tfree are set from the device's super block. 306 */ 307 bzero(&lu, sizeof(lu)); 308 309 /* 310 * XXX - Don't return an error if we can't find a vnode for the 311 * device. Our dev_t is 32-bits whereas Linux only has a 16-bits 312 * dev_t. The dev_t that is used now may as well be a truncated 313 * dev_t returned from previous syscalls. Just return a bzeroed 314 * ustat in that case. 315 */ 316 dev = makedev(uap->dev >> 8, uap->dev & 0xFF); 317 if (vfinddev(dev, VBLK, &vp)) { 318 if (vp->v_mount == NULL) 319 return (EINVAL); 320 stat = &(vp->v_mount->mnt_stat); 321 error = VFS_STATFS(vp->v_mount, stat, p); 322 if (error) 323 return (error); 324 325 lu.f_tfree = stat->f_bfree; 326 lu.f_tinode = stat->f_ffree; 327 } 328 329 return (copyout(&lu, uap->ubuf, sizeof(lu))); 330 }
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