Displaying 5 results from an estimated 5 matches for "init_fileops".
2020 Apr 09
6
[PATCH nbdkit v2 0/3] Implement fileops.
Needs some work still, see in particular the commit message
for patch 3.
Rich.
2020 Apr 09
0
[PATCH nbdkit v2 1/3] file: Move file operators to a new common/fileops mini-library.
...e and use NBDKIT_API_VERSION == 2
+ *
+ * - your plugin per-connection handle must either have type ‘struct
+ * fileops *’, or include ‘struct fileops’ as the first member
+ *
+ * - add FILEOPS_READ_WRITE_CALLBACKS or
+ * FILEOPS_READ_ONLY_CALLBACKS to your ‘struct nbdkit_plugin’
+ *
+ * - call init_fileops from your .open callback, and close_fileops
+ * from your .close callback
+ *
+ * - optionally call fileops_dump_plugin from your .dump_plugin
+ * callback if you have one
+ *
+ * - the fileops mini-library is linked statically into the plugin
+ *
+ * This mini-library is safe to use from any t...
2020 Apr 09
1
[PATCH nbdkit PRELIMINARY] file: Move file operators to a new fileops mini-library
...file callbacks (like file.pread, file.pwrite, file.zero
etc) to a new mini-library. They can then be consumed by other
plugins fairly easily by doing:
static void *
foo_open (int readonly)
{
struct fileops *fops;
int fd, flags;
/* Allocate *fops */
/* Set up fd however you want */
if (init_fileops (fd, fops) == -1) {
free (fops);
return NULL;
}
return fops;
}
static struct nbdkit_plugin plugin = {
.name = "foo",
.open = foo_open,
.close = foo_close,
FILEOPS_CALLBACKS
};
If we did this then it would only work for plugins w...
2020 Apr 09
0
[PATCH nbdkit v2 2/3] iso: Implement this plugin using fileops (read-only).
...+ if (fops == NULL) {
+ nbdkit_error ("malloc: %m");
+ return NULL;
+ }
+
+ /* Copy the fd because fileops needs to have its own file descriptor. */
+ fd = dup (iso_fd);
+ if (fd == -1) {
+ nbdkit_error ("dup: %m");
+ free (fops);
+ return NULL;
+ }
+
+ if (init_fileops (fd, fops) == -1) {
+ free (fops);
+ return NULL;
+ }
+
+ return fops;
+}
+
+/* Free up the per-connection handle. */
+static void
+iso_close (void *handle)
+{
+ struct fileops *fops = handle;
+
+ close_fileops (fops);
+ free (fops);
}
#define THREAD_MODEL NBDKIT_THREAD_MODEL_PARALLE...
2020 Apr 09
0
[PATCH nbdkit v2 3/3] tmpdisk: Implement this plugin using fileops.
...(h->fd);
- if (h->size == -1)
- goto error;
- }
- else /* Regular file. */
- h->size = statbuf.st_size;
- nbdkit_debug ("tmpdisk: requested_size = %" PRIi64 ", size = %" PRIi64,
- requested_size, h->size);
+ if (init_fileops (fd, fops) == -1)
+ goto error3;
/* We don't need the disk to appear in the filesystem since we hold
* a file descriptor and access it through that, so unlink the disk.
@@ -357,139 +290,26 @@ tmpdisk_open (int readonly)
rmdir (dir);
/* Return the handle. */
- return h;
+ r...