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#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#define __NO_VERSION__
#include <linux/module.h>
#include <asm/uaccess.h>
#include <linux/intermezzo_fs.h>
#include <linux/intermezzo_upcall.h>
#include <linux/intermezzo_psdev.h>
#include <linux/intermezzo_kml.h>
static struct presto_file_set * kml_getfset (char *path)
{
return presto_path2fileset(path);
}
/* Send the KML buffer and related volume info into kernel */
int begin_kml_reint (struct file *file, unsigned long arg)
{
struct {
char *volname;
int namelen;
char *recbuf;
int reclen; /* int newpos; */
} input;
struct kml_fsdata *kml_fsdata = NULL;
struct presto_file_set *fset = NULL;
char *path;
int error;
ENTRY;
/* allocate buffer & copy it to kernel space */
error = copy_from_user(&input, (char *)arg, sizeof(input));
if ( error ) {
EXIT;
return error;
}
if (input.reclen > kml_fsdata->kml_maxsize)
return -ENOMEM; /* we'll find solution to this in the future */
PRESTO_ALLOC(path, char *, input.namelen + 1);
if ( !path ) {
EXIT;
return -ENOMEM;
}
error = copy_from_user(path, input.volname, input.namelen);
if ( error ) {
PRESTO_FREE(path, input.namelen + 1);
EXIT;
return error;
}
path[input.namelen] = '\0';
fset = kml_getfset (path);
PRESTO_FREE(path, input.namelen + 1);
kml_fsdata = FSET_GET_KMLDATA(fset);
/* read the buf from user memory here */
error = copy_from_user(kml_fsdata->kml_buf, input.recbuf, input.reclen);
if ( error ) {
EXIT;
return error;
}
kml_fsdata->kml_len = input.reclen;
decode_kmlrec (&kml_fsdata->kml_reint_cache,
kml_fsdata->kml_buf, kml_fsdata->kml_len);
kml_fsdata->kml_reint_current = kml_fsdata->kml_reint_cache.next;
kml_fsdata->kml_reintpos = 0;
kml_fsdata->kml_count = 0;
return 0;
}
/* DO_KML_REINT */
int do_kml_reint (struct file *file, unsigned long arg)
{
struct {
char *volname;
int namelen;
char *path;
int pathlen;
int recno;
int offset;
int len;
int generation;
__u64 ino;
} input;
int error;
char *path;
struct kml_rec *close_rec;
struct kml_fsdata *kml_fsdata;
struct presto_file_set *fset;
ENTRY;
error = copy_from_user(&input, (char *)arg, sizeof(input));
if ( error ) {
EXIT;
return error;
}
PRESTO_ALLOC(path, char *, input.namelen + 1);
if ( !path ) {
EXIT;
return -ENOMEM;
}
error = copy_from_user(path, input.volname, input.namelen);
if ( error ) {
PRESTO_FREE(path, input.namelen + 1);
EXIT;
return error;
}
path[input.namelen] = '\0';
fset = kml_getfset (path);
PRESTO_FREE(path, input.namelen + 1);
kml_fsdata = FSET_GET_KMLDATA(fset);
error = kml_reintbuf(kml_fsdata,
fset->fset_mtpt->d_name.name,
&close_rec);
if (error == KML_CLOSE_BACKFETCH && close_rec != NULL) {
struct kml_close *close = &close_rec->rec_kml.close;
input.ino = close->ino;
input.generation = close->generation;
if (strlen (close->path) + 1 < input.pathlen) {
strcpy (input.path, close->path);
input.pathlen = strlen (close->path) + 1;
input.recno = close_rec->rec_tail.recno;
input.offset = close_rec->rec_kml_offset;
input.len = close_rec->rec_size;
input.generation = close->generation;
input.ino = close->ino;
}
else {
CDEBUG(D_KML, "KML_DO_REINT::no space to save:%d < %d",
strlen (close->path) + 1, input.pathlen);
error = -ENOMEM;
}
copy_to_user((char *)arg, &input, sizeof (input));
}
return error;
}
/* END_KML_REINT */
int end_kml_reint (struct file *file, unsigned long arg)
{
/* Free KML buffer and related volume info */
struct {
char *volname;
int namelen;
#if 0
int count;
int newpos;
#endif
} input;
struct presto_file_set *fset = NULL;
struct kml_fsdata *kml_fsdata = NULL;
int error;
char *path;
ENTRY;
error = copy_from_user(&input, (char *)arg, sizeof(input));
if ( error ) {
EXIT;
return error;
}
PRESTO_ALLOC(path, char *, input.namelen + 1);
if ( !path ) {
EXIT;
return -ENOMEM;
}
error = copy_from_user(path, input.volname, input.namelen);
if ( error ) {
PRESTO_FREE(path, input.namelen + 1);
EXIT;
return error;
}
path[input.namelen] = '\0';
fset = kml_getfset (path);
PRESTO_FREE(path, input.namelen + 1);
kml_fsdata = FSET_GET_KMLDATA(fset);
delete_kmlrec (&kml_fsdata->kml_reint_cache);
/* kml reint support */
kml_fsdata->kml_reint_current = NULL;
kml_fsdata->kml_len = 0;
kml_fsdata->kml_reintpos = 0;
kml_fsdata->kml_count = 0;
#if 0
input.newpos = kml_upc->newpos;
input.count = kml_upc->count;
copy_to_user((char *)arg, &input, sizeof (input));
#endif
return error;
}
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