* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
*
* This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
int v9fs_file_open(struct inode *inode, struct file *file)
{
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
- struct v9fs_fid *v9fid, *fid;
+ struct v9fs_fid *vfid;
struct v9fs_fcall *fcall = NULL;
- int open_mode = 0;
- unsigned int iounit = 0;
- int newfid = -1;
- long result = -1;
+ int omode;
+ int fid = V9FS_NOFID;
+ int err;
dprintk(DEBUG_VFS, "inode: %p file: %p \n", inode, file);
- v9fid = v9fs_fid_get_created(file->f_dentry);
- if (!v9fid)
- v9fid = v9fs_fid_lookup(file->f_dentry);
-
- if (!v9fid) {
+ vfid = v9fs_fid_lookup(file->f_dentry);
+ if (!vfid) {
dprintk(DEBUG_ERROR, "Couldn't resolve fid from dentry\n");
return -EBADF;
}
- if (!v9fid->fidcreate) {
- fid = kmalloc(sizeof(struct v9fs_fid), GFP_KERNEL);
- if (fid == NULL) {
- dprintk(DEBUG_ERROR, "Out of Memory\n");
- return -ENOMEM;
- }
-
- fid->fidopen = 0;
- fid->fidcreate = 0;
- fid->fidclunked = 0;
- fid->iounit = 0;
- fid->v9ses = v9ses;
-
- newfid = v9fs_get_idpool(&v9ses->fidpool);
- if (newfid < 0) {
- eprintk(KERN_WARNING, "newfid fails!\n");
- return -ENOSPC;
- }
-
- result =
- v9fs_t_walk(v9ses, v9fid->fid, newfid, NULL, NULL);
+ fid = v9fs_get_idpool(&v9ses->fidpool);
+ if (fid < 0) {
+ eprintk(KERN_WARNING, "newfid fails!\n");
+ return -ENOSPC;
+ }
- if (result < 0) {
- v9fs_put_idpool(newfid, &v9ses->fidpool);
- dprintk(DEBUG_ERROR, "rewalk didn't work\n");
- return -EBADF;
+ err = v9fs_t_walk(v9ses, vfid->fid, fid, NULL, &fcall);
+ if (err < 0) {
+ dprintk(DEBUG_ERROR, "rewalk didn't work\n");
+ if (fcall && fcall->id == RWALK)
+ goto clunk_fid;
+ else {
+ v9fs_put_idpool(fid, &v9ses->fidpool);
+ goto free_fcall;
}
+ }
+ kfree(fcall);
+
+ /* TODO: do special things for O_EXCL, O_NOFOLLOW, O_SYNC */
+ /* translate open mode appropriately */
+ omode = v9fs_uflags2omode(file->f_flags);
+ err = v9fs_t_open(v9ses, fid, omode, &fcall);
+ if (err < 0) {
+ PRINT_FCALL_ERROR("open failed", fcall);
+ goto clunk_fid;
+ }
- fid->fid = newfid;
- v9fid = fid;
- /* TODO: do special things for O_EXCL, O_NOFOLLOW, O_SYNC */
- /* translate open mode appropriately */
- open_mode = file->f_flags & 0x3;
-
- if (file->f_flags & O_EXCL)
- open_mode |= V9FS_OEXCL;
-
- if (v9ses->extended) {
- if (file->f_flags & O_TRUNC)
- open_mode |= V9FS_OTRUNC;
-
- if (file->f_flags & O_APPEND)
- open_mode |= V9FS_OAPPEND;
- }
+ vfid = kmalloc(sizeof(struct v9fs_fid), GFP_KERNEL);
+ if (vfid == NULL) {
+ dprintk(DEBUG_ERROR, "out of memory\n");
+ err = -ENOMEM;
+ goto clunk_fid;
+ }
- result = v9fs_t_open(v9ses, newfid, open_mode, &fcall);
- if (result < 0) {
- dprintk(DEBUG_ERROR,
- "open failed, open_mode 0x%x: %s\n", open_mode,
- FCALL_ERROR(fcall));
- kfree(fcall);
- return result;
- }
+ file->private_data = vfid;
+ vfid->fid = fid;
+ vfid->fidopen = 1;
+ vfid->fidclunked = 0;
+ vfid->iounit = fcall->params.ropen.iounit;
+ vfid->rdir_pos = 0;
+ vfid->rdir_fcall = NULL;
+ vfid->filp = file;
+ kfree(fcall);
- iounit = fcall->params.ropen.iounit;
- kfree(fcall);
- } else {
- /* create case */
- newfid = v9fid->fid;
- iounit = v9fid->iounit;
- v9fid->fidcreate = 0;
- }
+ return 0;
- file->private_data = v9fid;
+clunk_fid:
+ v9fs_t_clunk(v9ses, fid);
- v9fid->rdir_pos = 0;
- v9fid->rdir_fcall = NULL;
- v9fid->fidopen = 1;
- v9fid->filp = file;
- v9fid->iounit = iounit;
+free_fcall:
+ kfree(fcall);
- return 0;
+ return err;
}
/**
int result = -EIO;
int rsize = 0;
int total = 0;
- char *buf;
dprintk(DEBUG_VFS, "data %p count %d offset %x\n", data, (int)count,
(int)*offset);
if (v9fid->iounit != 0 && rsize > v9fid->iounit)
rsize = v9fid->iounit;
- buf = kmalloc(v9ses->maxdata - V9FS_IOHDRSZ, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
-
do {
if (count < rsize)
rsize = count;
- result = copy_from_user(buf, data, rsize);
- if (result) {
- dprintk(DEBUG_ERROR, "Problem copying from user\n");
- kfree(buf);
- return -EFAULT;
- }
-
- dump_data(buf, rsize);
- result = v9fs_t_write(v9ses, fid, *offset, rsize, buf, &fcall);
+ result = v9fs_t_write(v9ses, fid, *offset, rsize, data, &fcall);
if (result < 0) {
- eprintk(KERN_ERR, "error while writing: %s(%d)\n",
- FCALL_ERROR(fcall), result);
+ PRINT_FCALL_ERROR("error while writing", fcall);
kfree(fcall);
- kfree(buf);
return result;
} else
*offset += result;
total += result;
} while (count);
- kfree(buf);
+ invalidate_inode_pages2(inode->i_mapping);
return total;
}
-struct file_operations v9fs_file_operations = {
+const struct file_operations v9fs_file_operations = {
.llseek = generic_file_llseek,
.read = v9fs_file_read,
.write = v9fs_file_write,
.open = v9fs_file_open,
.release = v9fs_dir_release,
.lock = v9fs_file_lock,
+ .mmap = generic_file_mmap,
};
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff