1 |
1275 |
phoenix |
/*
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* Mostly platform independent upcall operations to Venus:
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* -- upcalls
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* -- upcall routines
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*
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* Linux 2.0 version
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* Copyright (C) 1996 Peter J. Braam <braam@maths.ox.ac.uk>,
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* Michael Callahan <callahan@maths.ox.ac.uk>
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*
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* Redone for Linux 2.1
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* Copyright (C) 1997 Carnegie Mellon University
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*
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* Carnegie Mellon University encourages users of this code to contribute
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* improvements to the Coda project. Contact Peter Braam <coda@cs.cmu.edu>.
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*/
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#include <asm/system.h>
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#include <asm/signal.h>
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#include <linux/signal.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/sched.h>
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#include <linux/fs.h>
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#include <linux/file.h>
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#include <linux/stat.h>
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#include <linux/errno.h>
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#include <linux/locks.h>
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#include <linux/string.h>
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#include <asm/uaccess.h>
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#include <linux/vmalloc.h>
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33 |
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#include <linux/coda.h>
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#include <linux/coda_linux.h>
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#include <linux/coda_psdev.h>
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#include <linux/coda_fs_i.h>
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#include <linux/coda_cache.h>
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#include <linux/coda_proc.h>
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40 |
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#define upc_alloc() kmalloc(sizeof(struct upc_req), GFP_KERNEL)
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#define upc_free(r) kfree(r)
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44 |
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static int coda_upcall(struct coda_sb_info *mntinfo, int inSize, int *outSize,
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union inputArgs *buffer);
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static void *alloc_upcall(int opcode, int size)
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{
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union inputArgs *inp;
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CODA_ALLOC(inp, union inputArgs *, size);
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if (!inp)
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return ERR_PTR(-ENOMEM);
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inp->ih.opcode = opcode;
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inp->ih.pid = current->pid;
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inp->ih.pgid = current->pgrp;
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coda_load_creds(&(inp->ih.cred));
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return (void*)inp;
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}
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#define UPARG(op)\
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do {\
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inp = (union inputArgs *)alloc_upcall(op, insize); \
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if (IS_ERR(inp)) { return PTR_ERR(inp); }\
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outp = (union outputArgs *)(inp); \
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outsize = insize; \
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} while (0)
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#define INSIZE(tag) sizeof(struct coda_ ## tag ## _in)
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#define OUTSIZE(tag) sizeof(struct coda_ ## tag ## _out)
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#define SIZE(tag) max_t(unsigned int, INSIZE(tag), OUTSIZE(tag))
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/* the upcalls */
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int venus_rootfid(struct super_block *sb, ViceFid *fidp)
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{
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union inputArgs *inp;
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union outputArgs *outp;
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int insize, outsize, error;
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insize = SIZE(root);
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UPARG(CODA_ROOT);
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error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
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if (error) {
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printk("coda_get_rootfid: error %d\n", error);
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} else {
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*fidp = (ViceFid) outp->coda_root.VFid;
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CDEBUG(D_SUPER, "VolumeId: %lx, VnodeId: %lx.\n",
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fidp->Volume, fidp->Vnode);
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}
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CODA_FREE(inp, insize);
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return error;
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}
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int venus_getattr(struct super_block *sb, struct ViceFid *fid,
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struct coda_vattr *attr)
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{
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union inputArgs *inp;
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union outputArgs *outp;
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int insize, outsize, error;
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insize = SIZE(getattr);
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UPARG(CODA_GETATTR);
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inp->coda_getattr.VFid = *fid;
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error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
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*attr = outp->coda_getattr.attr;
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CODA_FREE(inp, insize);
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return error;
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}
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int venus_setattr(struct super_block *sb, struct ViceFid *fid,
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struct coda_vattr *vattr)
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{
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union inputArgs *inp;
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union outputArgs *outp;
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int insize, outsize, error;
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insize = SIZE(setattr);
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UPARG(CODA_SETATTR);
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inp->coda_setattr.VFid = *fid;
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inp->coda_setattr.attr = *vattr;
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error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
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CDEBUG(D_SUPER, " result %d\n", error);
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CODA_FREE(inp, insize);
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return error;
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}
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int venus_lookup(struct super_block *sb, struct ViceFid *fid,
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const char *name, int length, int * type,
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struct ViceFid *resfid)
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{
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union inputArgs *inp;
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union outputArgs *outp;
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int insize, outsize, error;
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int offset;
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offset = INSIZE(lookup);
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insize = max_t(unsigned int, offset + length +1, OUTSIZE(lookup));
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UPARG(CODA_LOOKUP);
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inp->coda_lookup.VFid = *fid;
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inp->coda_lookup.name = offset;
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inp->coda_lookup.flags = CLU_CASE_SENSITIVE;
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/* send Venus a null terminated string */
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memcpy((char *)(inp) + offset, name, length);
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*((char *)inp + offset + length) = '\0';
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159 |
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error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
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*resfid = outp->coda_lookup.VFid;
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*type = outp->coda_lookup.vtype;
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CODA_FREE(inp, insize);
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return error;
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}
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168 |
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int venus_store(struct super_block *sb, struct ViceFid *fid, int flags,
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struct coda_cred *cred)
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{
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union inputArgs *inp;
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union outputArgs *outp;
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int insize, outsize, error;
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insize = SIZE(store);
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UPARG(CODA_STORE);
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memcpy(&(inp->ih.cred), cred, sizeof(*cred));
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inp->coda_store.VFid = *fid;
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inp->coda_store.flags = flags;
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error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
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CODA_FREE(inp, insize);
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return error;
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}
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int venus_release(struct super_block *sb, struct ViceFid *fid, int flags)
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{
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union inputArgs *inp;
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union outputArgs *outp;
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int insize, outsize, error;
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insize = SIZE(release);
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UPARG(CODA_RELEASE);
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inp->coda_release.VFid = *fid;
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inp->coda_release.flags = flags;
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error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
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CODA_FREE(inp, insize);
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return error;
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}
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int venus_close(struct super_block *sb, struct ViceFid *fid, int flags,
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struct coda_cred *cred)
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{
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union inputArgs *inp;
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union outputArgs *outp;
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int insize, outsize, error;
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insize = SIZE(release);
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UPARG(CODA_CLOSE);
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217 |
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memcpy(&(inp->ih.cred), cred, sizeof(*cred));
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219 |
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inp->coda_close.VFid = *fid;
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inp->coda_close.flags = flags;
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222 |
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error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
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224 |
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CODA_FREE(inp, insize);
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return error;
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}
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228 |
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int venus_open(struct super_block *sb, struct ViceFid *fid,
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int flags, struct file **fh)
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{
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union inputArgs *inp;
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232 |
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union outputArgs *outp;
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233 |
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int insize, outsize, error;
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insize = SIZE(open_by_fd);
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UPARG(CODA_OPEN_BY_FD);
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238 |
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inp->coda_open.VFid = *fid;
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inp->coda_open.flags = flags;
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241 |
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error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
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*fh = outp->coda_open_by_fd.fh;
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CODA_FREE(inp, insize);
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return error;
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}
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248 |
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249 |
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int venus_mkdir(struct super_block *sb, struct ViceFid *dirfid,
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const char *name, int length,
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struct ViceFid *newfid, struct coda_vattr *attrs)
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252 |
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{
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253 |
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union inputArgs *inp;
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254 |
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union outputArgs *outp;
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255 |
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int insize, outsize, error;
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256 |
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int offset;
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257 |
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258 |
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offset = INSIZE(mkdir);
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259 |
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insize = max_t(unsigned int, offset + length + 1, OUTSIZE(mkdir));
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260 |
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UPARG(CODA_MKDIR);
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261 |
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262 |
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inp->coda_mkdir.VFid = *dirfid;
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263 |
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inp->coda_mkdir.attr = *attrs;
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264 |
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inp->coda_mkdir.name = offset;
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265 |
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/* Venus must get null terminated string */
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266 |
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memcpy((char *)(inp) + offset, name, length);
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267 |
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*((char *)inp + offset + length) = '\0';
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268 |
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269 |
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error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
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270 |
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271 |
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*attrs = outp->coda_mkdir.attr;
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272 |
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*newfid = outp->coda_mkdir.VFid;
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273 |
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|
274 |
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CODA_FREE(inp, insize);
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275 |
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return error;
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276 |
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}
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277 |
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278 |
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279 |
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int venus_rename(struct super_block *sb, struct ViceFid *old_fid,
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280 |
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struct ViceFid *new_fid, size_t old_length,
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281 |
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size_t new_length, const char *old_name,
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282 |
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const char *new_name)
|
283 |
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{
|
284 |
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union inputArgs *inp;
|
285 |
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union outputArgs *outp;
|
286 |
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int insize, outsize, error;
|
287 |
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int offset, s;
|
288 |
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|
289 |
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offset = INSIZE(rename);
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290 |
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insize = max_t(unsigned int, offset + new_length + old_length + 8,
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291 |
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OUTSIZE(rename));
|
292 |
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UPARG(CODA_RENAME);
|
293 |
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|
294 |
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inp->coda_rename.sourceFid = *old_fid;
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295 |
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inp->coda_rename.destFid = *new_fid;
|
296 |
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inp->coda_rename.srcname = offset;
|
297 |
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|
298 |
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/* Venus must receive an null terminated string */
|
299 |
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s = ( old_length & ~0x3) +4; /* round up to word boundary */
|
300 |
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memcpy((char *)(inp) + offset, old_name, old_length);
|
301 |
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*((char *)inp + offset + old_length) = '\0';
|
302 |
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|
303 |
|
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/* another null terminated string for Venus */
|
304 |
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offset += s;
|
305 |
|
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inp->coda_rename.destname = offset;
|
306 |
|
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s = ( new_length & ~0x3) +4; /* round up to word boundary */
|
307 |
|
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memcpy((char *)(inp) + offset, new_name, new_length);
|
308 |
|
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*((char *)inp + offset + new_length) = '\0';
|
309 |
|
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|
310 |
|
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CDEBUG(D_INODE, "destname in packet: %s\n",
|
311 |
|
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(char *)inp + (int) inp->coda_rename.destname);
|
312 |
|
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error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
|
313 |
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|
314 |
|
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CODA_FREE(inp, insize);
|
315 |
|
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return error;
|
316 |
|
|
}
|
317 |
|
|
|
318 |
|
|
int venus_create(struct super_block *sb, struct ViceFid *dirfid,
|
319 |
|
|
const char *name, int length, int excl, int mode, int rdev,
|
320 |
|
|
struct ViceFid *newfid, struct coda_vattr *attrs)
|
321 |
|
|
{
|
322 |
|
|
union inputArgs *inp;
|
323 |
|
|
union outputArgs *outp;
|
324 |
|
|
int insize, outsize, error;
|
325 |
|
|
int offset;
|
326 |
|
|
|
327 |
|
|
offset = INSIZE(create);
|
328 |
|
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insize = max_t(unsigned int, offset + length + 1, OUTSIZE(create));
|
329 |
|
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UPARG(CODA_CREATE);
|
330 |
|
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|
331 |
|
|
inp->coda_create.VFid = *dirfid;
|
332 |
|
|
inp->coda_create.attr.va_mode = mode;
|
333 |
|
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inp->coda_create.attr.va_rdev = rdev;
|
334 |
|
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inp->coda_create.excl = excl;
|
335 |
|
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inp->coda_create.mode = mode;
|
336 |
|
|
inp->coda_create.name = offset;
|
337 |
|
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|
338 |
|
|
/* Venus must get null terminated string */
|
339 |
|
|
memcpy((char *)(inp) + offset, name, length);
|
340 |
|
|
*((char *)inp + offset + length) = '\0';
|
341 |
|
|
|
342 |
|
|
error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
|
343 |
|
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|
344 |
|
|
*attrs = outp->coda_create.attr;
|
345 |
|
|
*newfid = outp->coda_create.VFid;
|
346 |
|
|
|
347 |
|
|
CODA_FREE(inp, insize);
|
348 |
|
|
return error;
|
349 |
|
|
}
|
350 |
|
|
|
351 |
|
|
int venus_rmdir(struct super_block *sb, struct ViceFid *dirfid,
|
352 |
|
|
const char *name, int length)
|
353 |
|
|
{
|
354 |
|
|
union inputArgs *inp;
|
355 |
|
|
union outputArgs *outp;
|
356 |
|
|
int insize, outsize, error;
|
357 |
|
|
int offset;
|
358 |
|
|
|
359 |
|
|
offset = INSIZE(rmdir);
|
360 |
|
|
insize = max_t(unsigned int, offset + length + 1, OUTSIZE(rmdir));
|
361 |
|
|
UPARG(CODA_RMDIR);
|
362 |
|
|
|
363 |
|
|
inp->coda_rmdir.VFid = *dirfid;
|
364 |
|
|
inp->coda_rmdir.name = offset;
|
365 |
|
|
memcpy((char *)(inp) + offset, name, length);
|
366 |
|
|
*((char *)inp + offset + length) = '\0';
|
367 |
|
|
|
368 |
|
|
error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
|
369 |
|
|
|
370 |
|
|
CODA_FREE(inp, insize);
|
371 |
|
|
return error;
|
372 |
|
|
}
|
373 |
|
|
|
374 |
|
|
int venus_remove(struct super_block *sb, struct ViceFid *dirfid,
|
375 |
|
|
const char *name, int length)
|
376 |
|
|
{
|
377 |
|
|
union inputArgs *inp;
|
378 |
|
|
union outputArgs *outp;
|
379 |
|
|
int error=0, insize, outsize, offset;
|
380 |
|
|
|
381 |
|
|
offset = INSIZE(remove);
|
382 |
|
|
insize = max_t(unsigned int, offset + length + 1, OUTSIZE(remove));
|
383 |
|
|
UPARG(CODA_REMOVE);
|
384 |
|
|
|
385 |
|
|
inp->coda_remove.VFid = *dirfid;
|
386 |
|
|
inp->coda_remove.name = offset;
|
387 |
|
|
memcpy((char *)(inp) + offset, name, length);
|
388 |
|
|
*((char *)inp + offset + length) = '\0';
|
389 |
|
|
|
390 |
|
|
error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
|
391 |
|
|
|
392 |
|
|
CODA_FREE(inp, insize);
|
393 |
|
|
return error;
|
394 |
|
|
}
|
395 |
|
|
|
396 |
|
|
int venus_readlink(struct super_block *sb, struct ViceFid *fid,
|
397 |
|
|
char *buffer, int *length)
|
398 |
|
|
{
|
399 |
|
|
union inputArgs *inp;
|
400 |
|
|
union outputArgs *outp;
|
401 |
|
|
int insize, outsize, error;
|
402 |
|
|
int retlen;
|
403 |
|
|
char *result;
|
404 |
|
|
|
405 |
|
|
insize = max_t(unsigned int,
|
406 |
|
|
INSIZE(readlink), OUTSIZE(readlink)+ *length + 1);
|
407 |
|
|
UPARG(CODA_READLINK);
|
408 |
|
|
|
409 |
|
|
inp->coda_readlink.VFid = *fid;
|
410 |
|
|
|
411 |
|
|
error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
|
412 |
|
|
|
413 |
|
|
if (! error) {
|
414 |
|
|
retlen = outp->coda_readlink.count;
|
415 |
|
|
if ( retlen > *length )
|
416 |
|
|
retlen = *length;
|
417 |
|
|
*length = retlen;
|
418 |
|
|
result = (char *)outp + (long)outp->coda_readlink.data;
|
419 |
|
|
memcpy(buffer, result, retlen);
|
420 |
|
|
*(buffer + retlen) = '\0';
|
421 |
|
|
}
|
422 |
|
|
|
423 |
|
|
CDEBUG(D_INODE, " result %d\n",error);
|
424 |
|
|
CODA_FREE(inp, insize);
|
425 |
|
|
return error;
|
426 |
|
|
}
|
427 |
|
|
|
428 |
|
|
|
429 |
|
|
|
430 |
|
|
int venus_link(struct super_block *sb, struct ViceFid *fid,
|
431 |
|
|
struct ViceFid *dirfid, const char *name, int len )
|
432 |
|
|
{
|
433 |
|
|
union inputArgs *inp;
|
434 |
|
|
union outputArgs *outp;
|
435 |
|
|
int insize, outsize, error;
|
436 |
|
|
int offset;
|
437 |
|
|
|
438 |
|
|
offset = INSIZE(link);
|
439 |
|
|
insize = max_t(unsigned int, offset + len + 1, OUTSIZE(link));
|
440 |
|
|
UPARG(CODA_LINK);
|
441 |
|
|
|
442 |
|
|
inp->coda_link.sourceFid = *fid;
|
443 |
|
|
inp->coda_link.destFid = *dirfid;
|
444 |
|
|
inp->coda_link.tname = offset;
|
445 |
|
|
|
446 |
|
|
/* make sure strings are null terminated */
|
447 |
|
|
memcpy((char *)(inp) + offset, name, len);
|
448 |
|
|
*((char *)inp + offset + len) = '\0';
|
449 |
|
|
|
450 |
|
|
error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
|
451 |
|
|
|
452 |
|
|
CDEBUG(D_INODE, " result %d\n",error);
|
453 |
|
|
CODA_FREE(inp, insize);
|
454 |
|
|
return error;
|
455 |
|
|
}
|
456 |
|
|
|
457 |
|
|
int venus_symlink(struct super_block *sb, struct ViceFid *fid,
|
458 |
|
|
const char *name, int len,
|
459 |
|
|
const char *symname, int symlen)
|
460 |
|
|
{
|
461 |
|
|
union inputArgs *inp;
|
462 |
|
|
union outputArgs *outp;
|
463 |
|
|
int insize, outsize, error;
|
464 |
|
|
int offset, s;
|
465 |
|
|
|
466 |
|
|
offset = INSIZE(symlink);
|
467 |
|
|
insize = max_t(unsigned int, offset + len + symlen + 8, OUTSIZE(symlink));
|
468 |
|
|
UPARG(CODA_SYMLINK);
|
469 |
|
|
|
470 |
|
|
/* inp->coda_symlink.attr = *tva; XXXXXX */
|
471 |
|
|
inp->coda_symlink.VFid = *fid;
|
472 |
|
|
|
473 |
|
|
/* Round up to word boundary and null terminate */
|
474 |
|
|
inp->coda_symlink.srcname = offset;
|
475 |
|
|
s = ( symlen & ~0x3 ) + 4;
|
476 |
|
|
memcpy((char *)(inp) + offset, symname, symlen);
|
477 |
|
|
*((char *)inp + offset + symlen) = '\0';
|
478 |
|
|
|
479 |
|
|
/* Round up to word boundary and null terminate */
|
480 |
|
|
offset += s;
|
481 |
|
|
inp->coda_symlink.tname = offset;
|
482 |
|
|
s = (len & ~0x3) + 4;
|
483 |
|
|
memcpy((char *)(inp) + offset, name, len);
|
484 |
|
|
*((char *)inp + offset + len) = '\0';
|
485 |
|
|
|
486 |
|
|
error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
|
487 |
|
|
|
488 |
|
|
CDEBUG(D_INODE, " result %d\n",error);
|
489 |
|
|
CODA_FREE(inp, insize);
|
490 |
|
|
return error;
|
491 |
|
|
}
|
492 |
|
|
|
493 |
|
|
int venus_fsync(struct super_block *sb, struct ViceFid *fid)
|
494 |
|
|
{
|
495 |
|
|
union inputArgs *inp;
|
496 |
|
|
union outputArgs *outp;
|
497 |
|
|
int insize, outsize, error;
|
498 |
|
|
|
499 |
|
|
insize=SIZE(fsync);
|
500 |
|
|
UPARG(CODA_FSYNC);
|
501 |
|
|
|
502 |
|
|
inp->coda_fsync.VFid = *fid;
|
503 |
|
|
error = coda_upcall(coda_sbp(sb), sizeof(union inputArgs),
|
504 |
|
|
&outsize, inp);
|
505 |
|
|
|
506 |
|
|
CODA_FREE(inp, insize);
|
507 |
|
|
return error;
|
508 |
|
|
}
|
509 |
|
|
|
510 |
|
|
int venus_access(struct super_block *sb, struct ViceFid *fid, int mask)
|
511 |
|
|
{
|
512 |
|
|
union inputArgs *inp;
|
513 |
|
|
union outputArgs *outp;
|
514 |
|
|
int insize, outsize, error;
|
515 |
|
|
|
516 |
|
|
insize = SIZE(access);
|
517 |
|
|
UPARG(CODA_ACCESS);
|
518 |
|
|
|
519 |
|
|
inp->coda_access.VFid = *fid;
|
520 |
|
|
inp->coda_access.flags = mask;
|
521 |
|
|
|
522 |
|
|
error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
|
523 |
|
|
|
524 |
|
|
CODA_FREE(inp, insize);
|
525 |
|
|
return error;
|
526 |
|
|
}
|
527 |
|
|
|
528 |
|
|
|
529 |
|
|
int venus_pioctl(struct super_block *sb, struct ViceFid *fid,
|
530 |
|
|
unsigned int cmd, struct PioctlData *data)
|
531 |
|
|
{
|
532 |
|
|
union inputArgs *inp;
|
533 |
|
|
union outputArgs *outp;
|
534 |
|
|
int insize, outsize, error;
|
535 |
|
|
int iocsize;
|
536 |
|
|
|
537 |
|
|
insize = VC_MAXMSGSIZE;
|
538 |
|
|
UPARG(CODA_IOCTL);
|
539 |
|
|
|
540 |
|
|
/* build packet for Venus */
|
541 |
|
|
if (data->vi.in_size > VC_MAXDATASIZE) {
|
542 |
|
|
error = -EINVAL;
|
543 |
|
|
goto exit;
|
544 |
|
|
}
|
545 |
|
|
|
546 |
|
|
inp->coda_ioctl.VFid = *fid;
|
547 |
|
|
|
548 |
|
|
/* the cmd field was mutated by increasing its size field to
|
549 |
|
|
* reflect the path and follow args. We need to subtract that
|
550 |
|
|
* out before sending the command to Venus. */
|
551 |
|
|
inp->coda_ioctl.cmd = (cmd & ~(PIOCPARM_MASK << 16));
|
552 |
|
|
iocsize = ((cmd >> 16) & PIOCPARM_MASK) - sizeof(char *) - sizeof(int);
|
553 |
|
|
inp->coda_ioctl.cmd |= (iocsize & PIOCPARM_MASK) << 16;
|
554 |
|
|
|
555 |
|
|
/* in->coda_ioctl.rwflag = flag; */
|
556 |
|
|
inp->coda_ioctl.len = data->vi.in_size;
|
557 |
|
|
inp->coda_ioctl.data = (char *)(INSIZE(ioctl));
|
558 |
|
|
|
559 |
|
|
/* get the data out of user space */
|
560 |
|
|
if ( copy_from_user((char*)inp + (long)inp->coda_ioctl.data,
|
561 |
|
|
data->vi.in, data->vi.in_size) ) {
|
562 |
|
|
error = -EINVAL;
|
563 |
|
|
goto exit;
|
564 |
|
|
}
|
565 |
|
|
|
566 |
|
|
error = coda_upcall(coda_sbp(sb), SIZE(ioctl) + data->vi.in_size,
|
567 |
|
|
&outsize, inp);
|
568 |
|
|
|
569 |
|
|
if (error) {
|
570 |
|
|
printk("coda_pioctl: Venus returns: %d for %s\n",
|
571 |
|
|
error, coda_f2s(fid));
|
572 |
|
|
goto exit;
|
573 |
|
|
}
|
574 |
|
|
|
575 |
|
|
/* Copy out the OUT buffer. */
|
576 |
|
|
if (outp->coda_ioctl.len > data->vi.out_size) {
|
577 |
|
|
CDEBUG(D_FILE, "return len %d <= request len %d\n",
|
578 |
|
|
outp->coda_ioctl.len,
|
579 |
|
|
data->vi.out_size);
|
580 |
|
|
error = -EINVAL;
|
581 |
|
|
} else {
|
582 |
|
|
error = verify_area(VERIFY_WRITE, data->vi.out,
|
583 |
|
|
data->vi.out_size);
|
584 |
|
|
if ( error ) goto exit;
|
585 |
|
|
|
586 |
|
|
if (copy_to_user(data->vi.out,
|
587 |
|
|
(char *)outp + (long)outp->coda_ioctl.data,
|
588 |
|
|
data->vi.out_size)) {
|
589 |
|
|
error = -EINVAL;
|
590 |
|
|
goto exit;
|
591 |
|
|
}
|
592 |
|
|
}
|
593 |
|
|
|
594 |
|
|
exit:
|
595 |
|
|
CODA_FREE(inp, insize);
|
596 |
|
|
return error;
|
597 |
|
|
}
|
598 |
|
|
|
599 |
|
|
int venus_statfs(struct super_block *sb, struct statfs *sfs)
|
600 |
|
|
{
|
601 |
|
|
union inputArgs *inp;
|
602 |
|
|
union outputArgs *outp;
|
603 |
|
|
int insize, outsize, error;
|
604 |
|
|
|
605 |
|
|
insize = max_t(unsigned int, INSIZE(statfs), OUTSIZE(statfs));
|
606 |
|
|
UPARG(CODA_STATFS);
|
607 |
|
|
|
608 |
|
|
error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
|
609 |
|
|
|
610 |
|
|
if (!error) {
|
611 |
|
|
sfs->f_blocks = outp->coda_statfs.stat.f_blocks;
|
612 |
|
|
sfs->f_bfree = outp->coda_statfs.stat.f_bfree;
|
613 |
|
|
sfs->f_bavail = outp->coda_statfs.stat.f_bavail;
|
614 |
|
|
sfs->f_files = outp->coda_statfs.stat.f_files;
|
615 |
|
|
sfs->f_ffree = outp->coda_statfs.stat.f_ffree;
|
616 |
|
|
} else {
|
617 |
|
|
printk("coda_statfs: Venus returns: %d\n", error);
|
618 |
|
|
}
|
619 |
|
|
|
620 |
|
|
CDEBUG(D_INODE, " result %d\n",error);
|
621 |
|
|
CODA_FREE(inp, insize);
|
622 |
|
|
return error;
|
623 |
|
|
}
|
624 |
|
|
|
625 |
|
|
/*
|
626 |
|
|
* coda_upcall and coda_downcall routines.
|
627 |
|
|
*
|
628 |
|
|
*/
|
629 |
|
|
|
630 |
|
|
static inline unsigned long coda_waitfor_upcall(struct upc_req *vmp,
|
631 |
|
|
struct venus_comm *vcommp)
|
632 |
|
|
{
|
633 |
|
|
DECLARE_WAITQUEUE(wait, current);
|
634 |
|
|
struct timeval begin = { 0, 0 }, end = { 0, 0 };
|
635 |
|
|
|
636 |
|
|
vmp->uc_posttime = jiffies;
|
637 |
|
|
|
638 |
|
|
if (coda_upcall_timestamping)
|
639 |
|
|
do_gettimeofday(&begin);
|
640 |
|
|
|
641 |
|
|
add_wait_queue(&vmp->uc_sleep, &wait);
|
642 |
|
|
for (;;) {
|
643 |
|
|
if ( !coda_hard && vmp->uc_opcode != CODA_CLOSE )
|
644 |
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
645 |
|
|
else
|
646 |
|
|
set_current_state(TASK_UNINTERRUPTIBLE);
|
647 |
|
|
|
648 |
|
|
/* venus died */
|
649 |
|
|
if ( !vcommp->vc_inuse )
|
650 |
|
|
break;
|
651 |
|
|
|
652 |
|
|
/* got a reply */
|
653 |
|
|
if ( vmp->uc_flags & ( REQ_WRITE | REQ_ABORT ) )
|
654 |
|
|
break;
|
655 |
|
|
|
656 |
|
|
if ( !coda_hard && vmp->uc_opcode != CODA_CLOSE && signal_pending(current) ) {
|
657 |
|
|
/* if this process really wants to die, let it go */
|
658 |
|
|
if ( sigismember(&(current->pending.signal), SIGKILL) ||
|
659 |
|
|
sigismember(&(current->pending.signal), SIGINT) )
|
660 |
|
|
break;
|
661 |
|
|
/* signal is present: after timeout always return
|
662 |
|
|
really smart idea, probably useless ... */
|
663 |
|
|
if ( jiffies - vmp->uc_posttime > coda_timeout * HZ )
|
664 |
|
|
break;
|
665 |
|
|
}
|
666 |
|
|
schedule();
|
667 |
|
|
}
|
668 |
|
|
remove_wait_queue(&vmp->uc_sleep, &wait);
|
669 |
|
|
set_current_state(TASK_RUNNING);
|
670 |
|
|
|
671 |
|
|
if (coda_upcall_timestamping && begin.tv_sec != 0) {
|
672 |
|
|
do_gettimeofday(&end);
|
673 |
|
|
|
674 |
|
|
if (end.tv_usec < begin.tv_usec) {
|
675 |
|
|
end.tv_usec += 1000000; end.tv_sec--;
|
676 |
|
|
}
|
677 |
|
|
end.tv_sec -= begin.tv_sec;
|
678 |
|
|
end.tv_usec -= begin.tv_usec;
|
679 |
|
|
}
|
680 |
|
|
|
681 |
|
|
CDEBUG(D_SPECIAL, "begin: %ld.%06ld, elapsed: %ld.%06ld\n",
|
682 |
|
|
begin.tv_sec, (unsigned long)begin.tv_usec,
|
683 |
|
|
end.tv_sec, (unsigned long)end.tv_usec);
|
684 |
|
|
|
685 |
|
|
return ((end.tv_sec * 1000000) + end.tv_usec);
|
686 |
|
|
}
|
687 |
|
|
|
688 |
|
|
|
689 |
|
|
/*
|
690 |
|
|
* coda_upcall will return an error in the case of
|
691 |
|
|
* failed communication with Venus _or_ will peek at Venus
|
692 |
|
|
* reply and return Venus' error.
|
693 |
|
|
*
|
694 |
|
|
* As venus has 2 types of errors, normal errors (positive) and internal
|
695 |
|
|
* errors (negative), normal errors are negated, while internal errors
|
696 |
|
|
* are all mapped to -EINTR, while showing a nice warning message. (jh)
|
697 |
|
|
*
|
698 |
|
|
*/
|
699 |
|
|
static int coda_upcall(struct coda_sb_info *sbi,
|
700 |
|
|
int inSize, int *outSize,
|
701 |
|
|
union inputArgs *buffer)
|
702 |
|
|
{
|
703 |
|
|
unsigned long runtime;
|
704 |
|
|
struct venus_comm *vcommp;
|
705 |
|
|
union outputArgs *out;
|
706 |
|
|
struct upc_req *req;
|
707 |
|
|
int error = 0;
|
708 |
|
|
|
709 |
|
|
vcommp = sbi->sbi_vcomm;
|
710 |
|
|
if ( !vcommp->vc_inuse ) {
|
711 |
|
|
printk("No pseudo device in upcall comms at %p\n", vcommp);
|
712 |
|
|
return -ENXIO;
|
713 |
|
|
}
|
714 |
|
|
|
715 |
|
|
/* Format the request message. */
|
716 |
|
|
req = upc_alloc();
|
717 |
|
|
if (!req) {
|
718 |
|
|
printk("Failed to allocate upc_req structure\n");
|
719 |
|
|
return -ENOMEM;
|
720 |
|
|
}
|
721 |
|
|
req->uc_data = (void *)buffer;
|
722 |
|
|
req->uc_flags = 0;
|
723 |
|
|
req->uc_inSize = inSize;
|
724 |
|
|
req->uc_outSize = *outSize ? *outSize : inSize;
|
725 |
|
|
req->uc_opcode = ((union inputArgs *)buffer)->ih.opcode;
|
726 |
|
|
req->uc_unique = ++vcommp->vc_seq;
|
727 |
|
|
init_waitqueue_head(&req->uc_sleep);
|
728 |
|
|
|
729 |
|
|
/* Fill in the common input args. */
|
730 |
|
|
((union inputArgs *)buffer)->ih.unique = req->uc_unique;
|
731 |
|
|
|
732 |
|
|
/* Append msg to pending queue and poke Venus. */
|
733 |
|
|
list_add(&(req->uc_chain), vcommp->vc_pending.prev);
|
734 |
|
|
|
735 |
|
|
CDEBUG(D_UPCALL,
|
736 |
|
|
"Proc %d wake Venus for(opc,uniq) =(%d,%d) msg at %p.zzz.\n",
|
737 |
|
|
current->pid, req->uc_opcode, req->uc_unique, req);
|
738 |
|
|
|
739 |
|
|
wake_up_interruptible(&vcommp->vc_waitq);
|
740 |
|
|
/* We can be interrupted while we wait for Venus to process
|
741 |
|
|
* our request. If the interrupt occurs before Venus has read
|
742 |
|
|
* the request, we dequeue and return. If it occurs after the
|
743 |
|
|
* read but before the reply, we dequeue, send a signal
|
744 |
|
|
* message, and return. If it occurs after the reply we ignore
|
745 |
|
|
* it. In no case do we want to restart the syscall. If it
|
746 |
|
|
* was interrupted by a venus shutdown (psdev_close), return
|
747 |
|
|
* ENODEV. */
|
748 |
|
|
|
749 |
|
|
/* Go to sleep. Wake up on signals only after the timeout. */
|
750 |
|
|
runtime = coda_waitfor_upcall(req, vcommp);
|
751 |
|
|
coda_upcall_stats(((union inputArgs *)buffer)->ih.opcode, runtime);
|
752 |
|
|
|
753 |
|
|
CDEBUG(D_TIMING, "opc: %d time: %ld uniq: %d size: %d\n",
|
754 |
|
|
req->uc_opcode, jiffies - req->uc_posttime,
|
755 |
|
|
req->uc_unique, req->uc_outSize);
|
756 |
|
|
CDEBUG(D_UPCALL,
|
757 |
|
|
"..process %d woken up by Venus for req at %p, data at %p\n",
|
758 |
|
|
current->pid, req, req->uc_data);
|
759 |
|
|
if (vcommp->vc_inuse) { /* i.e. Venus is still alive */
|
760 |
|
|
/* Op went through, interrupt or not... */
|
761 |
|
|
if (req->uc_flags & REQ_WRITE) {
|
762 |
|
|
out = (union outputArgs *)req->uc_data;
|
763 |
|
|
/* here we map positive Venus errors to kernel errors */
|
764 |
|
|
error = -out->oh.result;
|
765 |
|
|
CDEBUG(D_UPCALL,
|
766 |
|
|
"upcall: (u,o,r) (%ld, %ld, %ld) out at %p\n",
|
767 |
|
|
out->oh.unique, out->oh.opcode, out->oh.result, out);
|
768 |
|
|
*outSize = req->uc_outSize;
|
769 |
|
|
goto exit;
|
770 |
|
|
}
|
771 |
|
|
if ( !(req->uc_flags & REQ_READ) && signal_pending(current)) {
|
772 |
|
|
/* Interrupted before venus read it. */
|
773 |
|
|
CDEBUG(D_UPCALL,
|
774 |
|
|
"Interrupted before read:(op,un) (%d.%d), flags = %x\n",
|
775 |
|
|
req->uc_opcode, req->uc_unique, req->uc_flags);
|
776 |
|
|
list_del(&(req->uc_chain));
|
777 |
|
|
/* perhaps the best way to convince the app to
|
778 |
|
|
give up? */
|
779 |
|
|
error = -EINTR;
|
780 |
|
|
goto exit;
|
781 |
|
|
}
|
782 |
|
|
if ( (req->uc_flags & REQ_READ) && signal_pending(current) ) {
|
783 |
|
|
/* interrupted after Venus did its read, send signal */
|
784 |
|
|
union inputArgs *sig_inputArgs;
|
785 |
|
|
struct upc_req *sig_req;
|
786 |
|
|
|
787 |
|
|
CDEBUG(D_UPCALL,
|
788 |
|
|
"Sending Venus a signal: op = %d.%d, flags = %x\n",
|
789 |
|
|
req->uc_opcode, req->uc_unique, req->uc_flags);
|
790 |
|
|
|
791 |
|
|
list_del(&(req->uc_chain));
|
792 |
|
|
error = -ENOMEM;
|
793 |
|
|
sig_req = upc_alloc();
|
794 |
|
|
if (!sig_req) goto exit;
|
795 |
|
|
|
796 |
|
|
CODA_ALLOC((sig_req->uc_data), char *, sizeof(struct coda_in_hdr));
|
797 |
|
|
if (!sig_req->uc_data) {
|
798 |
|
|
upc_free(sig_req);
|
799 |
|
|
goto exit;
|
800 |
|
|
}
|
801 |
|
|
|
802 |
|
|
error = -EINTR;
|
803 |
|
|
sig_inputArgs = (union inputArgs *)sig_req->uc_data;
|
804 |
|
|
sig_inputArgs->ih.opcode = CODA_SIGNAL;
|
805 |
|
|
sig_inputArgs->ih.unique = req->uc_unique;
|
806 |
|
|
|
807 |
|
|
sig_req->uc_flags = REQ_ASYNC;
|
808 |
|
|
sig_req->uc_opcode = sig_inputArgs->ih.opcode;
|
809 |
|
|
sig_req->uc_unique = sig_inputArgs->ih.unique;
|
810 |
|
|
sig_req->uc_inSize = sizeof(struct coda_in_hdr);
|
811 |
|
|
sig_req->uc_outSize = sizeof(struct coda_in_hdr);
|
812 |
|
|
CDEBUG(D_UPCALL,
|
813 |
|
|
"coda_upcall: enqueing signal msg (%d, %d)\n",
|
814 |
|
|
sig_req->uc_opcode, sig_req->uc_unique);
|
815 |
|
|
|
816 |
|
|
/* insert at head of queue! */
|
817 |
|
|
list_add(&(sig_req->uc_chain), &vcommp->vc_pending);
|
818 |
|
|
wake_up_interruptible(&vcommp->vc_waitq);
|
819 |
|
|
} else {
|
820 |
|
|
printk("Coda: Strange interruption..\n");
|
821 |
|
|
error = -EINTR;
|
822 |
|
|
}
|
823 |
|
|
} else { /* If venus died i.e. !VC_OPEN(vcommp) */
|
824 |
|
|
printk("coda_upcall: Venus dead on (op,un) (%d.%d) flags %d\n",
|
825 |
|
|
req->uc_opcode, req->uc_unique, req->uc_flags);
|
826 |
|
|
error = -ENODEV;
|
827 |
|
|
}
|
828 |
|
|
|
829 |
|
|
exit:
|
830 |
|
|
upc_free(req);
|
831 |
|
|
if (error)
|
832 |
|
|
badclstats();
|
833 |
|
|
return error;
|
834 |
|
|
}
|
835 |
|
|
|
836 |
|
|
/*
|
837 |
|
|
The statements below are part of the Coda opportunistic
|
838 |
|
|
programming -- taken from the Mach/BSD kernel code for Coda.
|
839 |
|
|
You don't get correct semantics by stating what needs to be
|
840 |
|
|
done without guaranteeing the invariants needed for it to happen.
|
841 |
|
|
When will be have time to find out what exactly is going on? (pjb)
|
842 |
|
|
*/
|
843 |
|
|
|
844 |
|
|
|
845 |
|
|
/*
|
846 |
|
|
* There are 7 cases where cache invalidations occur. The semantics
|
847 |
|
|
* of each is listed here:
|
848 |
|
|
*
|
849 |
|
|
* CODA_FLUSH -- flush all entries from the name cache and the cnode cache.
|
850 |
|
|
* CODA_PURGEUSER -- flush all entries from the name cache for a specific user
|
851 |
|
|
* This call is a result of token expiration.
|
852 |
|
|
*
|
853 |
|
|
* The next arise as the result of callbacks on a file or directory.
|
854 |
|
|
* CODA_ZAPFILE -- flush the cached attributes for a file.
|
855 |
|
|
|
856 |
|
|
* CODA_ZAPDIR -- flush the attributes for the dir and
|
857 |
|
|
* force a new lookup for all the children
|
858 |
|
|
of this dir.
|
859 |
|
|
|
860 |
|
|
*
|
861 |
|
|
* The next is a result of Venus detecting an inconsistent file.
|
862 |
|
|
* CODA_PURGEFID -- flush the attribute for the file
|
863 |
|
|
* purge it and its children from the dcache
|
864 |
|
|
*
|
865 |
|
|
* The last allows Venus to replace local fids with global ones
|
866 |
|
|
* during reintegration.
|
867 |
|
|
*
|
868 |
|
|
* CODA_REPLACE -- replace one ViceFid with another throughout the name cache */
|
869 |
|
|
|
870 |
|
|
int coda_downcall(int opcode, union outputArgs * out, struct super_block *sb)
|
871 |
|
|
{
|
872 |
|
|
/* Handle invalidation requests. */
|
873 |
|
|
if ( !sb || !sb->s_root || !sb->s_root->d_inode) {
|
874 |
|
|
CDEBUG(D_DOWNCALL, "coda_downcall: opcode %d, no sb!\n", opcode);
|
875 |
|
|
return 0;
|
876 |
|
|
}
|
877 |
|
|
|
878 |
|
|
switch (opcode) {
|
879 |
|
|
|
880 |
|
|
case CODA_FLUSH : {
|
881 |
|
|
clstats(CODA_FLUSH);
|
882 |
|
|
CDEBUG(D_DOWNCALL, "CODA_FLUSH\n");
|
883 |
|
|
coda_cache_clear_all(sb, NULL);
|
884 |
|
|
shrink_dcache_sb(sb);
|
885 |
|
|
coda_flag_inode(sb->s_root->d_inode, C_FLUSH);
|
886 |
|
|
return(0);
|
887 |
|
|
}
|
888 |
|
|
|
889 |
|
|
case CODA_PURGEUSER : {
|
890 |
|
|
struct coda_cred *cred = &out->coda_purgeuser.cred;
|
891 |
|
|
CDEBUG(D_DOWNCALL, "CODA_PURGEUSER\n");
|
892 |
|
|
if ( !cred ) {
|
893 |
|
|
printk("PURGEUSER: null cred!\n");
|
894 |
|
|
return 0;
|
895 |
|
|
}
|
896 |
|
|
clstats(CODA_PURGEUSER);
|
897 |
|
|
coda_cache_clear_all(sb, cred);
|
898 |
|
|
return(0);
|
899 |
|
|
}
|
900 |
|
|
|
901 |
|
|
case CODA_ZAPDIR : {
|
902 |
|
|
struct inode *inode;
|
903 |
|
|
ViceFid *fid = &out->coda_zapdir.CodaFid;
|
904 |
|
|
CDEBUG(D_DOWNCALL, "zapdir: fid = %s...\n", coda_f2s(fid));
|
905 |
|
|
clstats(CODA_ZAPDIR);
|
906 |
|
|
|
907 |
|
|
inode = coda_fid_to_inode(fid, sb);
|
908 |
|
|
if (inode) {
|
909 |
|
|
CDEBUG(D_DOWNCALL, "zapdir: inode = %ld children flagged\n",
|
910 |
|
|
inode->i_ino);
|
911 |
|
|
coda_flag_inode_children(inode, C_PURGE);
|
912 |
|
|
CDEBUG(D_DOWNCALL, "zapdir: inode = %ld cache cleared\n", inode->i_ino);
|
913 |
|
|
coda_flag_inode(inode, C_VATTR);
|
914 |
|
|
iput(inode);
|
915 |
|
|
} else
|
916 |
|
|
CDEBUG(D_DOWNCALL, "zapdir: no inode\n");
|
917 |
|
|
|
918 |
|
|
return(0);
|
919 |
|
|
}
|
920 |
|
|
|
921 |
|
|
case CODA_ZAPFILE : {
|
922 |
|
|
struct inode *inode;
|
923 |
|
|
struct ViceFid *fid = &out->coda_zapfile.CodaFid;
|
924 |
|
|
clstats(CODA_ZAPFILE);
|
925 |
|
|
CDEBUG(D_DOWNCALL, "zapfile: fid = %s\n", coda_f2s(fid));
|
926 |
|
|
inode = coda_fid_to_inode(fid, sb);
|
927 |
|
|
if ( inode ) {
|
928 |
|
|
CDEBUG(D_DOWNCALL, "zapfile: inode = %ld\n",
|
929 |
|
|
inode->i_ino);
|
930 |
|
|
coda_flag_inode(inode, C_VATTR);
|
931 |
|
|
iput(inode);
|
932 |
|
|
} else
|
933 |
|
|
CDEBUG(D_DOWNCALL, "zapfile: no inode\n");
|
934 |
|
|
return 0;
|
935 |
|
|
}
|
936 |
|
|
|
937 |
|
|
case CODA_PURGEFID : {
|
938 |
|
|
struct inode *inode;
|
939 |
|
|
ViceFid *fid = &out->coda_purgefid.CodaFid;
|
940 |
|
|
CDEBUG(D_DOWNCALL, "purgefid: fid = %s\n", coda_f2s(fid));
|
941 |
|
|
clstats(CODA_PURGEFID);
|
942 |
|
|
inode = coda_fid_to_inode(fid, sb);
|
943 |
|
|
if ( inode ) {
|
944 |
|
|
CDEBUG(D_DOWNCALL, "purgefid: inode = %ld\n",
|
945 |
|
|
inode->i_ino);
|
946 |
|
|
coda_flag_inode_children(inode, C_PURGE);
|
947 |
|
|
|
948 |
|
|
/* catch the dentries later if some are still busy */
|
949 |
|
|
coda_flag_inode(inode, C_PURGE);
|
950 |
|
|
d_prune_aliases(inode);
|
951 |
|
|
|
952 |
|
|
iput(inode);
|
953 |
|
|
} else
|
954 |
|
|
CDEBUG(D_DOWNCALL, "purgefid: no inode\n");
|
955 |
|
|
return 0;
|
956 |
|
|
}
|
957 |
|
|
|
958 |
|
|
case CODA_REPLACE : {
|
959 |
|
|
struct inode *inode;
|
960 |
|
|
ViceFid *oldfid = &out->coda_replace.OldFid;
|
961 |
|
|
ViceFid *newfid = &out->coda_replace.NewFid;
|
962 |
|
|
clstats(CODA_REPLACE);
|
963 |
|
|
CDEBUG(D_DOWNCALL, "CODA_REPLACE\n");
|
964 |
|
|
inode = coda_fid_to_inode(oldfid, sb);
|
965 |
|
|
if ( inode ) {
|
966 |
|
|
CDEBUG(D_DOWNCALL, "replacefid: inode = %ld\n",
|
967 |
|
|
inode->i_ino);
|
968 |
|
|
coda_replace_fid(inode, oldfid, newfid);
|
969 |
|
|
iput(inode);
|
970 |
|
|
}else
|
971 |
|
|
CDEBUG(D_DOWNCALL, "purgefid: no inode\n");
|
972 |
|
|
|
973 |
|
|
return 0;
|
974 |
|
|
}
|
975 |
|
|
}
|
976 |
|
|
return 0;
|
977 |
|
|
}
|
978 |
|
|
|