int v9fs_file_open(struct inode *inode, struct file *file)
{
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
- struct v9fs_fid *v9fid = v9fs_fid_lookup(file->f_dentry, FID_WALK);
- struct v9fs_fid *v9newfid = NULL;
+ struct v9fs_fid *v9fid, *fid;
struct v9fs_fcall *fcall = NULL;
int open_mode = 0;
unsigned int iounit = 0;
int newfid = -1;
long result = -1;
- dprintk(DEBUG_VFS, "inode: %p file: %p v9fid= %p\n", inode, file,
- v9fid);
+ 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) {
- struct dentry *dentry = file->f_dentry;
dprintk(DEBUG_ERROR, "Couldn't resolve fid from dentry\n");
+ return -EBADF;
+ }
- /* XXX - some duplication from lookup, generalize later */
- /* basically vfs_lookup is too heavy weight */
- v9fid = v9fs_fid_lookup(file->f_dentry, FID_OP);
- if (!v9fid)
- 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;
+ }
- v9fid = v9fs_fid_lookup(dentry->d_parent, FID_WALK);
- if (!v9fid)
- return -EBADF;
+ fid->fidopen = 0;
+ fid->fidcreate = 0;
+ fid->fidclunked = 0;
+ fid->iounit = 0;
+ fid->v9ses = v9ses;
newfid = v9fs_get_idpool(&v9ses->fidpool);
if (newfid < 0) {
}
result =
- v9fs_t_walk(v9ses, v9fid->fid, newfid,
- (char *)file->f_dentry->d_name.name, NULL);
+ v9fs_t_walk(v9ses, v9fid->fid, newfid, NULL, NULL);
+
if (result < 0) {
v9fs_put_idpool(newfid, &v9ses->fidpool);
dprintk(DEBUG_ERROR, "rewalk didn't work\n");
return -EBADF;
}
- v9fid = v9fs_fid_create(dentry);
- if (v9fid == NULL) {
- dprintk(DEBUG_ERROR, "couldn't insert\n");
- return -ENOMEM;
- }
- v9fid->fid = newfid;
- }
-
- if (v9fid->fidcreate) {
- /* create case */
- newfid = v9fid->fid;
- iounit = v9fid->iounit;
- v9fid->fidcreate = 0;
- } else {
- if (!S_ISDIR(inode->i_mode))
- newfid = v9fid->fid;
- else {
- newfid = v9fs_get_idpool(&v9ses->fidpool);
- if (newfid < 0) {
- eprintk(KERN_WARNING, "allocation failed\n");
- return -ENOSPC;
- }
- /* This would be a somewhat critical clone */
- result =
- v9fs_t_walk(v9ses, v9fid->fid, newfid, NULL,
- &fcall);
- if (result < 0) {
- dprintk(DEBUG_ERROR, "clone error: %s\n",
- FCALL_ERROR(fcall));
- kfree(fcall);
- return result;
- }
-
- v9newfid = v9fs_fid_create(file->f_dentry);
- v9newfid->fid = newfid;
- v9newfid->qid = v9fid->qid;
- v9newfid->iounit = v9fid->iounit;
- v9newfid->fidopen = 0;
- v9newfid->fidclunked = 0;
- v9newfid->v9ses = v9ses;
- v9fid = v9newfid;
- kfree(fcall);
- }
-
+ 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;
iounit = fcall->params.ropen.iounit;
kfree(fcall);
+ } else {
+ /* create case */
+ newfid = v9fid->fid;
+ iounit = v9fid->iounit;
+ v9fid->fidcreate = 0;
}
-
file->private_data = v9fid;
v9fid->rdir_pos = 0;
}
/**
- * v9fs_read - read from a file (internal)
+ * v9fs_file_read - read from a file
* @filep: file pointer to read
* @data: data buffer to read data into
* @count: size of buffer
* @offset: offset at which to read data
*
*/
-
static ssize_t
-v9fs_read(struct file *filp, char *buffer, size_t count, loff_t * offset)
+v9fs_file_read(struct file *filp, char __user * data, size_t count,
+ loff_t * offset)
{
struct inode *inode = filp->f_dentry->d_inode;
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
int rsize = 0;
int result = 0;
int total = 0;
+ int n;
dprintk(DEBUG_VFS, "\n");
} else
*offset += result;
- /* XXX - extra copy */
- memcpy(buffer, fcall->params.rread.data, result);
+ n = copy_to_user(data, fcall->params.rread.data, result);
+ if (n) {
+ dprintk(DEBUG_ERROR, "Problem copying to user %d\n", n);
+ kfree(fcall);
+ return -EFAULT;
+ }
+
count -= result;
- buffer += result;
+ data += result;
total += result;
kfree(fcall);
}
/**
- * v9fs_file_read - read from a file
- * @filep: file pointer to read
- * @data: data buffer to read data into
- * @count: size of buffer
- * @offset: offset at which to read data
- *
- */
-
-static ssize_t
-v9fs_file_read(struct file *filp, char __user * data, size_t count,
- loff_t * offset)
-{
- int retval = -1;
- int ret = 0;
- char *buffer;
-
- buffer = kmalloc(count, GFP_KERNEL);
- if (!buffer)
- return -ENOMEM;
-
- retval = v9fs_read(filp, buffer, count, offset);
- if (retval > 0) {
- if ((ret = copy_to_user(data, buffer, retval)) != 0) {
- dprintk(DEBUG_ERROR, "Problem copying to user %d\n",
- ret);
- retval = ret;
- }
- }
-
- kfree(buffer);
-
- return retval;
-}
-
-/**
- * v9fs_write - write to a file
+ * v9fs_file_write - write to a file
* @filep: file pointer to write
* @data: data buffer to write data from
* @count: size of buffer
*/
static ssize_t
-v9fs_write(struct file *filp, char *buffer, size_t count, loff_t * offset)
+v9fs_file_write(struct file *filp, const char __user * data,
+ size_t count, loff_t * offset)
{
struct inode *inode = filp->f_dentry->d_inode;
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
int result = -EIO;
int rsize = 0;
int total = 0;
+ char *buf;
- dprintk(DEBUG_VFS, "data %p count %d offset %x\n", buffer, (int)count,
+ dprintk(DEBUG_VFS, "data %p count %d offset %x\n", data, (int)count,
(int)*offset);
rsize = v9ses->maxdata - V9FS_IOHDRSZ;
if (v9fid->iounit != 0 && rsize > v9fid->iounit)
rsize = v9fid->iounit;
- dump_data(buffer, count);
+ buf = kmalloc(v9ses->maxdata - V9FS_IOHDRSZ, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
do {
if (count < rsize)
rsize = count;
- result =
- v9fs_t_write(v9ses, fid, *offset, rsize, buffer, &fcall);
+ 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);
if (result < 0) {
eprintk(KERN_ERR, "error while writing: %s(%d)\n",
FCALL_ERROR(fcall), result);
kfree(fcall);
+ kfree(buf);
return result;
} else
*offset += result;
kfree(fcall);
+ fcall = NULL;
if (result != rsize) {
eprintk(KERN_ERR,
}
count -= result;
- buffer += result;
+ data += result;
total += result;
} while (count);
+ kfree(buf);
return total;
}
-/**
- * v9fs_file_write - write to a file
- * @filep: file pointer to write
- * @data: data buffer to write data from
- * @count: size of buffer
- * @offset: offset at which to write data
- *
- */
-
-static ssize_t
-v9fs_file_write(struct file *filp, const char __user * data,
- size_t count, loff_t * offset)
-{
- int ret = -1;
- char *buffer;
-
- buffer = kmalloc(count, GFP_KERNEL);
- if (buffer == NULL)
- return -ENOMEM;
-
- ret = copy_from_user(buffer, data, count);
- if (ret) {
- dprintk(DEBUG_ERROR, "Problem copying from user\n");
- ret = -EFAULT;
- } else {
- ret = v9fs_write(filp, buffer, count, offset);
- }
-
- kfree(buffer);
-
- return ret;
-}
-
struct file_operations v9fs_file_operations = {
.llseek = generic_file_llseek,
.read = v9fs_file_read,
projects / powerpc.git / blobdiff