FreeBSD/Linux Kernel Cross Reference
sys/coda/coda_venus.c

     /*      $NetBSD: coda_venus.c,v 1.30 2013/10/17 20:56:02 christos Exp $ */
     
     /*
      *
      *             Coda: an Experimental Distributed File System
      *                              Release 3.1
      *
      *           Copyright (c) 1987-1998 Carnegie Mellon University
      *                          All Rights Reserved
     *
     * Permission  to  use, copy, modify and distribute this software and its
     * documentation is hereby granted,  provided  that  both  the  copyright
     * notice  and  this  permission  notice  appear  in  all  copies  of the
     * software, derivative works or  modified  versions,  and  any  portions
     * thereof, and that both notices appear in supporting documentation, and
     * that credit is given to Carnegie Mellon University  in  all  documents
     * and publicity pertaining to direct or indirect use of this code or its
     * derivatives.
     *
     * CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS  KNOWN  TO  HAVE  BUGS,
     * SOME  OF  WHICH MAY HAVE SERIOUS CONSEQUENCES.  CARNEGIE MELLON ALLOWS
     * FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION.   CARNEGIE  MELLON
     * DISCLAIMS  ANY  LIABILITY  OF  ANY  KIND  FOR  ANY  DAMAGES WHATSOEVER
     * RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE  OR  OF
     * ANY DERIVATIVE WORK.
     *
     * Carnegie  Mellon  encourages  users  of  this  software  to return any
     * improvements or extensions that  they  make,  and  to  grant  Carnegie
     * Mellon the rights to redistribute these changes without encumbrance.
     *
     *      @(#) coda/coda_venus.c,v 1.1.1.1 1998/08/29 21:26:45 rvb Exp $
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: coda_venus.c,v 1.30 2013/10/17 20:56:02 christos Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/malloc.h>
    #include <sys/proc.h>
    #include <sys/select.h>
    #include <sys/ioctl.h>
    /* for CNV_OFLAGS below */
    #include <sys/fcntl.h>
    #include <sys/kauth.h>
    
    #include <coda/coda.h>
    #include <coda/cnode.h>
    #include <coda/coda_venus.h>
    #include <coda/coda_pioctl.h>
    
    #ifdef _KERNEL_OPT
    #include "opt_coda_compat.h"
    #endif
    
    /*
     * Isize and Osize are the sizes of the input and output arguments.
     * SEMI-INVARIANT: name##_size (e.g. coda_readlink_size) is the max of
     * the input and output.  This invariant is not well maintained, but
     * should be true after ALLOC_*.  Isize is modified after allocation
     * by STRCPY below - this is in general unsafe and needs fixing.
     */
    
    #define DECL_NO_IN(name)                                \
        struct coda_in_hdr *inp;                            \
        struct name ## _out *outp;                          \
        int name ## _size = sizeof (struct coda_in_hdr);    \
        int Isize = sizeof (struct coda_in_hdr);            \
        int Osize = sizeof (struct name ## _out);           \
        int error
    
    #define DECL(name)                                      \
        struct name ## _in *inp;                            \
        struct name ## _out *outp;                          \
        int name ## _size = sizeof (struct name ## _in);    \
        int Isize = sizeof (struct name ## _in);            \
        int Osize = sizeof (struct name ## _out);           \
        int error
    
    #define DECL_NO_OUT(name)                               \
        struct name ## _in *inp;                            \
        int name ## _size = sizeof (struct name ## _in);    \
        int Isize = sizeof (struct name ## _in);            \
        int Osize = sizeof (struct coda_out_hdr);           \
        int error
    
    #define ALLOC_NO_IN(name)                               \
        if (Osize > name ## _size)                          \
            name ## _size = Osize;                          \
        CODA_ALLOC(inp, struct coda_in_hdr *, name ## _size);\
        outp = (struct name ## _out *) inp
    
    #define ALLOC(name)                                     \
        if (Osize > name ## _size)                          \
            name ## _size = Osize;                          \
        CODA_ALLOC(inp, struct name ## _in *, name ## _size);\
        outp = (struct name ## _out *) inp
    
    #define ALLOC_NO_OUT(name)                              \
       if (Osize > name ## _size)                          \
           name ## _size = Osize;                          \
       CODA_ALLOC(inp, struct name ## _in *, name ## _size);\
   
   #define STRCPY(struc, name, len) \
       memcpy((char *)inp + (int)inp->struc, name, len); \
       ((char*)inp + (int)inp->struc)[len++] = 0; \
       Isize += len
   /* XXX verify that Isize has not overrun available storage */
   
   #ifdef CODA_COMPAT_5
   
   #define INIT_IN(in, op, ident, p) \
             (in)->opcode = (op); \
             (in)->pid = p ? p->p_pid : -1; \
             (in)->pgid = p ? p->p_pgid : -1; \
             (in)->sid = (p && p->p_session && p->p_session->s_leader) ? \
                   (p->p_session->s_leader->p_pid) : -1; \
             KASSERT(cred != NULL); \
             KASSERT(cred != FSCRED); \
             if (ident != NOCRED) {                              \
                 (in)->cred.cr_uid = kauth_cred_geteuid(ident);              \
                 (in)->cred.cr_groupid = kauth_cred_getegid(ident);          \
             } else {                                            \
                 memset(&((in)->cred), 0, sizeof(struct coda_cred)); \
                 (in)->cred.cr_uid = -1;                         \
                 (in)->cred.cr_groupid = -1;                     \
             }                                                   \
   
   #else
   
   #define INIT_IN(in, op, ident, p)               \
             (in)->opcode = (op);                  \
             (in)->pid = p ? p->p_pid : -1;        \
             (in)->pgid = p ? p->p_pgid : -1;      \
             KASSERT(cred != NULL); \
             KASSERT(cred != FSCRED); \
             if (ident != NOCRED) {                \
                 (in)->uid = kauth_cred_geteuid(ident);        \
             } else {                              \
                 (in)->uid = -1;                   \
             }                                                   \
   
   #endif
   
   #define INIT_IN_L(in, op, ident, l)             \
           INIT_IN(in, op, ident, (l ? l->l_proc : NULL))
   
   #define CNV_OFLAG(to, from)                             \
       do {                                                \
             to = 0;                                       \
             if (from & FREAD)   to |= C_O_READ;           \
             if (from & FWRITE)  to |= C_O_WRITE;          \
             if (from & O_TRUNC) to |= C_O_TRUNC;          \
             if (from & O_EXCL)  to |= C_O_EXCL;           \
             if (from & O_CREAT) to |= C_O_CREAT;          \
       } while (/*CONSTCOND*/ 0)
   
   #define CNV_VV2V_ATTR(top, fromp) \
           do { \
                   (top)->va_type = (fromp)->va_type; \
                   (top)->va_mode = (fromp)->va_mode; \
                   (top)->va_nlink = (fromp)->va_nlink; \
                   (top)->va_uid = (fromp)->va_uid; \
                   (top)->va_gid = (fromp)->va_gid; \
                   (top)->va_fsid = VNOVAL; \
                   (top)->va_fileid = (fromp)->va_fileid; \
                   (top)->va_size = (fromp)->va_size; \
                   (top)->va_blocksize = (fromp)->va_blocksize; \
                   (top)->va_atime = (fromp)->va_atime; \
                   (top)->va_mtime = (fromp)->va_mtime; \
                   (top)->va_ctime = (fromp)->va_ctime; \
                   (top)->va_gen = (fromp)->va_gen; \
                   (top)->va_flags = (fromp)->va_flags; \
                   (top)->va_rdev = (fromp)->va_rdev; \
                   (top)->va_bytes = (fromp)->va_bytes; \
                   (top)->va_filerev = (fromp)->va_filerev; \
                   (top)->va_vaflags = VNOVAL; \
                   (top)->va_spare = VNOVAL; \
           } while (/*CONSTCOND*/ 0)
   
   #define CNV_V2VV_ATTR(top, fromp) \
           do { \
                   (top)->va_type = (fromp)->va_type; \
                   (top)->va_mode = (fromp)->va_mode; \
                   (top)->va_nlink = (fromp)->va_nlink; \
                   (top)->va_uid = (fromp)->va_uid; \
                   (top)->va_gid = (fromp)->va_gid; \
                   (top)->va_fileid = (fromp)->va_fileid; \
                   (top)->va_size = (fromp)->va_size; \
                   (top)->va_blocksize = (fromp)->va_blocksize; \
                   (top)->va_atime = (fromp)->va_atime; \
                   (top)->va_mtime = (fromp)->va_mtime; \
                   (top)->va_ctime = (fromp)->va_ctime; \
                   (top)->va_gen = (fromp)->va_gen; \
                   (top)->va_flags = (fromp)->va_flags; \
                   (top)->va_rdev = (fromp)->va_rdev; \
                   (top)->va_bytes = (fromp)->va_bytes; \
                   (top)->va_filerev = (fromp)->va_filerev; \
           } while (/*CONSTCOND*/ 0)
   
   
   int
   venus_root(void *mdp,
           kauth_cred_t cred, struct proc *p,
   /*out*/ CodaFid *VFid)
   {
       DECL_NO_IN(coda_root);              /* sets Isize & Osize */
       ALLOC_NO_IN(coda_root);             /* sets inp & outp */
   
       /* send the open to venus. */
       INIT_IN(inp, CODA_ROOT, cred, p);
   
       error = coda_call(mdp, Isize, &Osize, (char *)inp);
       if (!error)
           *VFid = outp->Fid;
   
       CODA_FREE(inp, coda_root_size);
       return error;
   }
   
   int
   venus_open(void *mdp, CodaFid *fid, int flag,
           kauth_cred_t cred, struct lwp *l,
   /*out*/ dev_t *dev, ino_t *inode)
   {
       int cflag;
       DECL(coda_open);                    /* sets Isize & Osize */
       ALLOC(coda_open);                   /* sets inp & outp */
   
       /* send the open to venus. */
       INIT_IN_L(&inp->ih, CODA_OPEN, cred, l);
       inp->Fid = *fid;
       CNV_OFLAG(cflag, flag);
       inp->flags = cflag;
   
       error = coda_call(mdp, Isize, &Osize, (char *)inp);
       KASSERT(outp != NULL);
       if (!error) {
           *dev =  outp->dev;
           *inode = outp->inode;
       }
   
       CODA_FREE(inp, coda_open_size);
       return error;
   }
   
   int
   venus_close(void *mdp, CodaFid *fid, int flag,
           kauth_cred_t cred, struct lwp *l)
   {
       int cflag;
       DECL_NO_OUT(coda_close);            /* sets Isize & Osize */
       ALLOC_NO_OUT(coda_close);           /* sets inp & outp */
   
       INIT_IN_L(&inp->ih, CODA_CLOSE, cred, l);
       inp->Fid = *fid;
       CNV_OFLAG(cflag, flag);
       inp->flags = cflag;
   
       error = coda_call(mdp, Isize, &Osize, (char *)inp);
   
       CODA_FREE(inp, coda_close_size);
       return error;
   }
   
   /*
    * these two calls will not exist!!!  the container file is read/written
    * directly.
    */
   void
   venus_read(void)
   {
   }
   
   void
   venus_write(void)
   {
   }
   
   /*
    * this is a bit sad too.  the ioctl's are for the control file, not for
    * normal files.
    */
   int
   venus_ioctl(void *mdp, CodaFid *fid,
           int com, int flag, void *data,
           kauth_cred_t cred, struct lwp *l)
   {
       DECL(coda_ioctl);                   /* sets Isize & Osize */
       struct PioctlData *iap = (struct PioctlData *)data;
       int tmp;
   
       coda_ioctl_size = VC_MAXMSGSIZE;
       ALLOC(coda_ioctl);                  /* sets inp & outp */
   
       INIT_IN_L(&inp->ih, CODA_IOCTL, cred, l);
       inp->Fid = *fid;
   
       /* command was mutated by increasing its size field to reflect the
        * path and follow args. we need to subtract that out before sending
        * the command to venus.
        */
       inp->cmd = (com & ~(IOCPARM_MASK << 16));
       tmp = ((com >> 16) & IOCPARM_MASK) - sizeof (char *) - sizeof (int);
       inp->cmd |= (tmp & IOCPARM_MASK) << 16;
   
       if (iap->vi.in_size > VC_MAXMSGSIZE || iap->vi.out_size > VC_MAXMSGSIZE) {
           CODA_FREE(inp, coda_ioctl_size);
           return (EINVAL);
       }
   
       inp->rwflag = flag;
       inp->len = iap->vi.in_size;
       inp->data = (char *)(sizeof (struct coda_ioctl_in));
   
       error = copyin(iap->vi.in, (char*)inp + (int)(long)inp->data,
                      iap->vi.in_size);
       if (error) {
           CODA_FREE(inp, coda_ioctl_size);
           return(error);
       }
   
       Osize = VC_MAXMSGSIZE;
       error = coda_call(mdp, Isize + iap->vi.in_size, &Osize, (char *)inp);
   
           /* copy out the out buffer. */
       if (!error) {
           if (outp->len > iap->vi.out_size) {
               error = EINVAL;
           } else {
               error = copyout((char *)outp + (int)(long)outp->data,
                               iap->vi.out, iap->vi.out_size);
           }
       }
   
       CODA_FREE(inp, coda_ioctl_size);
       return error;
   }
   
   int
   venus_getattr(void *mdp, CodaFid *fid,
           kauth_cred_t cred, struct lwp *l,
   /*out*/ struct vattr *vap)
   {
       DECL(coda_getattr);                 /* sets Isize & Osize */
       ALLOC(coda_getattr);                        /* sets inp & outp */
   
       /* send the open to venus. */
       INIT_IN_L(&inp->ih, CODA_GETATTR, cred, l);
       inp->Fid = *fid;
   
       error = coda_call(mdp, Isize, &Osize, (char *)inp);
       if (!error) {
           CNV_VV2V_ATTR(vap, &outp->attr);
       }
   
       CODA_FREE(inp, coda_getattr_size);
       return error;
   }
   
   int
   venus_setattr(void *mdp, CodaFid *fid, struct vattr *vap,
           kauth_cred_t cred, struct lwp *l)
   {
       DECL_NO_OUT(coda_setattr);          /* sets Isize & Osize */
       ALLOC_NO_OUT(coda_setattr);         /* sets inp & outp */
   
       /* send the open to venus. */
       INIT_IN_L(&inp->ih, CODA_SETATTR, cred, l);
       inp->Fid = *fid;
       CNV_V2VV_ATTR(&inp->attr, vap);
   
       error = coda_call(mdp, Isize, &Osize, (char *)inp);
   
       CODA_FREE(inp, coda_setattr_size);
       return error;
   }
   
   int
   venus_access(void *mdp, CodaFid *fid, int mode,
           kauth_cred_t cred, struct lwp *l)
   {
       DECL_NO_OUT(coda_access);           /* sets Isize & Osize */
       ALLOC_NO_OUT(coda_access);          /* sets inp & outp */
   
       /* send the open to venus. */
       INIT_IN_L(&inp->ih, CODA_ACCESS, cred, l);
       inp->Fid = *fid;
       inp->flags = mode;
   
       error = coda_call(mdp, Isize, &Osize, (char *)inp);
   
       CODA_FREE(inp, coda_access_size);
       return error;
   }
   
   int
   venus_readlink(void *mdp, CodaFid *fid,
           kauth_cred_t cred, struct lwp *l,
   /*out*/ char **str, int *len)
   {
       DECL(coda_readlink);                        /* sets Isize & Osize */
       /* XXX coda_readlink_size should not be set here */
       coda_readlink_size += CODA_MAXPATHLEN;
       Osize += CODA_MAXPATHLEN;
       ALLOC(coda_readlink);               /* sets inp & outp */
   
       /* send the open to venus. */
       INIT_IN_L(&inp->ih, CODA_READLINK, cred, l);
       inp->Fid = *fid;
   
       error = coda_call(mdp, Isize, &Osize, (char *)inp);
       KASSERT(outp != NULL);
       if (error != 0)
               goto out;
   
       /* Check count for reasonableness */
       if (outp->count <= 0 || outp->count > CODA_MAXPATHLEN) {
               printf("venus_readlink: bad count %d\n", outp->count);
               error = EINVAL;
               goto out;
       }
   
       /*
        * Check data pointer for reasonableness.  It must point after
        * itself, and within the allocated region.
        */
       if ((intptr_t) outp->data < sizeof(struct coda_readlink_out) ) {
               printf("venus_readlink: data pointer %lld too low\n",
                      (long long)((intptr_t) outp->data));
               error = EINVAL;
               goto out;
       }
       
       if ((intptr_t) outp->data + outp->count >
           sizeof(struct coda_readlink_out) + CODA_MAXPATHLEN) {
               printf("venus_readlink: data pointer %lld too high\n",
                      (long long)((intptr_t) outp->data));
               error = EINVAL;
               goto out;
       }
   
       if (!error) {
               CODA_ALLOC(*str, char *, outp->count);
               *len = outp->count;
               memcpy(*str, (char *)outp + (int)(long)outp->data, *len);
       }
   
   out:
       CODA_FREE(inp, coda_readlink_size);
       return error;
   }
   
   int
   venus_fsync(void *mdp, CodaFid *fid,
           kauth_cred_t cred, struct lwp *l)
   {
       DECL_NO_OUT(coda_fsync);            /* sets Isize & Osize */
       ALLOC_NO_OUT(coda_fsync);           /* sets inp & outp */
   
       /* send the open to venus. */
       INIT_IN_L(&inp->ih, CODA_FSYNC, cred, l);
       inp->Fid = *fid;
   
       error = coda_call(mdp, Isize, &Osize, (char *)inp);
   
       CODA_FREE(inp, coda_fsync_size);
       return error;
   }
   
   int
   venus_lookup(void *mdp, CodaFid *fid,
           const char *nm, int len,
           kauth_cred_t cred, struct lwp *l,
   /*out*/ CodaFid *VFid, int *vtype)
   {
       DECL(coda_lookup);                  /* sets Isize & Osize */
       coda_lookup_size += len + 1;
       ALLOC(coda_lookup);                 /* sets inp & outp */
   
       /* send the open to venus. */
       INIT_IN_L(&inp->ih, CODA_LOOKUP, cred, l);
       inp->Fid = *fid;
   
       /* NOTE:
        * Between version 1 and version 2 we have added an extra flag field
        * to this structure.  But because the string was at the end and because
        * of the weird way we represent strings by having the slot point to
        * where the string characters are in the "heap", we can just slip the
        * flag parameter in after the string slot pointer and veni that don't
        * know better won't see this new flag field ...
        * Otherwise we'd need two different venus_lookup functions.
        */
       inp->name = Isize;
       inp->flags = CLU_CASE_SENSITIVE;    /* doesn't really matter for BSD */
       /* This is safe because we preallocated len+1 extra. */
       STRCPY(name, nm, len);              /* increments Isize */
   
       error = coda_call(mdp, Isize, &Osize, (char *)inp);
       KASSERT(outp != NULL);
       if (!error) {
           *VFid = outp->Fid;
           *vtype = outp->vtype;
       }
   
       CODA_FREE(inp, coda_lookup_size);
       return error;
   }
   
   int
   venus_create(void *mdp, CodaFid *fid,
           const char *nm, int len, int exclusive, int mode, struct vattr *va,
           kauth_cred_t cred, struct lwp *l,
   /*out*/ CodaFid *VFid, struct vattr *attr)
   {
       DECL(coda_create);                  /* sets Isize & Osize */
       coda_create_size += len + 1;
       ALLOC(coda_create);                 /* sets inp & outp */
   
       /* send the open to venus. */
       INIT_IN_L(&inp->ih, CODA_CREATE, cred, l);
       inp->Fid = *fid;
       inp->excl = exclusive ? C_O_EXCL : 0;
       inp->mode = mode<<6;
       CNV_V2VV_ATTR(&inp->attr, va);
   
       inp->name = Isize;
       STRCPY(name, nm, len);              /* increments Isize */
   
       error = coda_call(mdp, Isize, &Osize, (char *)inp);
       KASSERT(outp != NULL);
       if (!error) {
           *VFid = outp->Fid;
           CNV_VV2V_ATTR(attr, &outp->attr);
       }
   
       CODA_FREE(inp, coda_create_size);
       return error;
   }
   
   int
   venus_remove(void *mdp, CodaFid *fid,
           const char *nm, int len,
           kauth_cred_t cred, struct lwp *l)
   {
       DECL_NO_OUT(coda_remove);           /* sets Isize & Osize */
       coda_remove_size += len + 1;
       ALLOC_NO_OUT(coda_remove);          /* sets inp & outp */
   
       /* send the open to venus. */
       INIT_IN_L(&inp->ih, CODA_REMOVE, cred, l);
       inp->Fid = *fid;
   
       inp->name = Isize;
       STRCPY(name, nm, len);              /* increments Isize */
   
       error = coda_call(mdp, Isize, &Osize, (char *)inp);
   
       CODA_FREE(inp, coda_remove_size);
       return error;
   }
   
   int
   venus_link(void *mdp, CodaFid *fid, CodaFid *tfid,
           const char *nm, int len,
           kauth_cred_t cred, struct lwp *l)
   {
       DECL_NO_OUT(coda_link);             /* sets Isize & Osize */
       coda_link_size += len + 1;
       ALLOC_NO_OUT(coda_link);            /* sets inp & outp */
   
       /* send the open to venus. */
       INIT_IN_L(&inp->ih, CODA_LINK, cred, l);
       inp->sourceFid = *fid;
       inp->destFid = *tfid;
   
       inp->tname = Isize;
       STRCPY(tname, nm, len);             /* increments Isize */
   
       error = coda_call(mdp, Isize, &Osize, (char *)inp);
   
       CODA_FREE(inp, coda_link_size);
       return error;
   }
   
   int
   venus_rename(void *mdp, CodaFid *fid, CodaFid *tfid,
           const char *nm, int len, const char *tnm, int tlen,
           kauth_cred_t cred, struct lwp *l)
   {
       DECL_NO_OUT(coda_rename);           /* sets Isize & Osize */
       coda_rename_size += len + 1 + tlen + 1;
       ALLOC_NO_OUT(coda_rename);          /* sets inp & outp */
   
       /* send the open to venus. */
       INIT_IN_L(&inp->ih, CODA_RENAME, cred, l);
       inp->sourceFid = *fid;
       inp->destFid = *tfid;
   
       inp->srcname = Isize;
       STRCPY(srcname, nm, len);           /* increments Isize */
   
       inp->destname = Isize;
       STRCPY(destname, tnm, tlen);        /* increments Isize */
   
       error = coda_call(mdp, Isize, &Osize, (char *)inp);
   
       CODA_FREE(inp, coda_rename_size);
       return error;
   }
   
   int
   venus_mkdir(void *mdp, CodaFid *fid,
           const char *nm, int len, struct vattr *va,
           kauth_cred_t cred, struct lwp *l,
   /*out*/ CodaFid *VFid, struct vattr *ova)
   {
       DECL(coda_mkdir);                   /* sets Isize & Osize */
       coda_mkdir_size += len + 1;
       ALLOC(coda_mkdir);                  /* sets inp & outp */
   
       /* send the open to venus. */
       INIT_IN_L(&inp->ih, CODA_MKDIR, cred, l);
       inp->Fid = *fid;
       CNV_V2VV_ATTR(&inp->attr, va);
   
       inp->name = Isize;
       STRCPY(name, nm, len);              /* increments Isize */
   
       error = coda_call(mdp, Isize, &Osize, (char *)inp);
       KASSERT(outp != NULL);
       if (!error) {
           *VFid = outp->Fid;
           CNV_VV2V_ATTR(ova, &outp->attr);
       }
   
       CODA_FREE(inp, coda_mkdir_size);
       return error;
   }
   
   int
   venus_rmdir(void *mdp, CodaFid *fid,
           const char *nm, int len,
           kauth_cred_t cred, struct lwp *l)
   {
       DECL_NO_OUT(coda_rmdir);            /* sets Isize & Osize */
       coda_rmdir_size += len + 1;
       ALLOC_NO_OUT(coda_rmdir);           /* sets inp & outp */
   
       /* send the open to venus. */
       INIT_IN_L(&inp->ih, CODA_RMDIR, cred, l);
       inp->Fid = *fid;
   
       inp->name = Isize;
       STRCPY(name, nm, len);              /* increments Isize */
   
       error = coda_call(mdp, Isize, &Osize, (char *)inp);
   
       CODA_FREE(inp, coda_rmdir_size);
       return error;
   }
   
   int
   venus_symlink(void *mdp, CodaFid *fid,
           const char *lnm, int llen, const char *nm, int len, struct vattr *va,
           kauth_cred_t cred, struct lwp *l)
   {
       DECL_NO_OUT(coda_symlink);          /* sets Isize & Osize */
       coda_symlink_size += llen + 1 + len + 1;
       ALLOC_NO_OUT(coda_symlink);         /* sets inp & outp */
   
       /* send the open to venus. */
       INIT_IN_L(&inp->ih, CODA_SYMLINK, cred, l);
       inp->Fid = *fid;
       CNV_V2VV_ATTR(&inp->attr, va);
   
       inp->srcname = Isize;
       STRCPY(srcname, lnm, llen);         /* increments Isize */
   
       inp->tname = Isize;
       STRCPY(tname, nm, len);             /* increments Isize */
   
       error = coda_call(mdp, Isize, &Osize, (char *)inp);
   
       CODA_FREE(inp, coda_symlink_size);
       return error;
   }
   
   int
   venus_readdir(void *mdp, CodaFid *fid,
           int count, int offset,
           kauth_cred_t cred, struct lwp *l,
   /*out*/ char *buffer, int *len)
   {
       DECL(coda_readdir);                 /* sets Isize & Osize */
       coda_readdir_size = VC_MAXMSGSIZE;
       ALLOC(coda_readdir);                        /* sets inp & outp */
   
       /* send the open to venus. */
       INIT_IN_L(&inp->ih, CODA_READDIR, cred, l);
       inp->Fid = *fid;
       inp->count = count;
       inp->offset = offset;
   
       Osize = VC_MAXMSGSIZE;
       error = coda_call(mdp, Isize, &Osize, (char *)inp);
       KASSERT(outp != NULL);
       if (!error) {
           memcpy(buffer, (char *)outp + (int)(long)outp->data, outp->size);
           *len = outp->size;
       }
   
       CODA_FREE(inp, coda_readdir_size);
       return error;
   }
   
   int
   venus_statfs(void *mdp, kauth_cred_t cred, struct lwp *l,
      /*out*/   struct coda_statfs *fsp)
   {
       DECL(coda_statfs);                  /* sets Isize & Osize */
       ALLOC(coda_statfs);                 /* sets inp & outp */
   
       /* send the open to venus. */
       INIT_IN_L(&inp->ih, CODA_STATFS, cred, l);
   
       error = coda_call(mdp, Isize, &Osize, (char *)inp);
       KASSERT(outp != NULL);
       if (!error) {
           *fsp = outp->stat;
       }
   
       CODA_FREE(inp, coda_statfs_size);
       return error;
   }
   
   int
   venus_fhtovp(void *mdp, CodaFid *fid,
           kauth_cred_t cred, struct proc *p,
   /*out*/ CodaFid *VFid, int *vtype)
   {
       DECL(coda_vget);                    /* sets Isize & Osize */
       ALLOC(coda_vget);                   /* sets inp & outp */
   
       /* Send the open to Venus. */
       INIT_IN(&inp->ih, CODA_VGET, cred, p);
       inp->Fid = *fid;
   
       error = coda_call(mdp, Isize, &Osize, (char *)inp);
       KASSERT(outp != NULL);
       if (!error) {
           *VFid = outp->Fid;
           *vtype = outp->vtype;
       }
   
       CODA_FREE(inp, coda_vget_size);
       return error;
   }

Cache object: bd9c36c67f49ef49ea2dd684fc40eefd