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hw/9pfs: Add st_gen support in getattr reply

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This patch use file system specific ioctl for getting i_generation
value. Not all file system support the ioctl. So we add an export
specific extended operation and assign right callback for the
file system that support i_generation ioctl

["M. Mohan Kumar" <mohan@in.ibm.com> we can do ioctl only for
regular files and directories on the server]

Signed-off-by: Harsh Prateek Bora <harsh@linux.vnet.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
This commit is contained in:
Harsh Prateek Bora 2011-10-12 19:11:25 +05:30 • committed by Aneesh Kumar K.V
parent 9844081bca
commit e06a765efb
7 changed files with 116 additions and 1 deletions
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24
hw/9pfs/cofile.c
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@ -17,6 +17,30 @@
#include "qemu-coroutine.h"
#include "virtio-9p-coth.h"
int v9fs_co_st_gen(V9fsPDU *pdu, V9fsPath *path, mode_t st_mode,
V9fsStatDotl *v9stat)
{
int err = 0;
V9fsState *s = pdu->s;
if (v9fs_request_cancelled(pdu)) {
return -EINTR;
}
if (s->ctx.exops.get_st_gen) {
v9fs_path_read_lock(s);
v9fs_co_run_in_worker(
{
err = s->ctx.exops.get_st_gen(&s->ctx, path, st_mode,
&v9stat->st_gen);
if (err < 0) {
err = -errno;
}
});
v9fs_path_unlock(s);
}
return err;
}
int v9fs_co_lstat(V9fsPDU *pdu, V9fsPath *path, struct stat *stbuf)
{
int err;