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virtio-9p: Add P9_TREMOVE support. 

Implement P9_TREMOVE support.
This gets file deletion to work.

[mohan@in.ibm.com: Fix truncate to use the relative path]

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Anthony Liguori 2010-04-29 17:45:01 +05:30
parent 8cf89e007a
commit 5bae190082
3 changed files with 55 additions and 2 deletions
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1
hw/file-op-9p.h
View File

@ -34,6 +34,7 @@ typedef struct FileOperations
int (*mknod)(FsContext *, const char *, mode_t, dev_t);
int (*mksock)(FsContext *, const char *);
int (*utime)(FsContext *, const char *, const struct utimbuf *);
int (*remove)(FsContext *, const char *);
int (*symlink)(FsContext *, const char *, const char *);
int (*link)(FsContext *, const char *, const char *);
int (*setuid)(FsContext *, uid_t);

6
hw/virtio-9p-local.c
View File

@ -252,6 +252,11 @@ static int local_utime(FsContext *ctx, const char *path,
return utime(rpath(ctx, path), buf);
}
static int local_remove(FsContext *ctx, const char *path)
{
return remove(rpath(ctx, path));
}
static int local_fsync(FsContext *ctx, int fd)
{
return fsync(fd);
@ -284,5 +289,6 @@ FileOperations local_ops = {
.rename = local_rename,
.chown = local_chown,
.utime = local_utime,
.remove = local_remove,
.fsync = local_fsync,
};

50
hw/virtio-9p.c
View File

@ -166,6 +166,11 @@ static int v9fs_do_utime(V9fsState *s, V9fsString *path,
return s->ops->utime(&s->ctx, path->data, buf);
}
static int v9fs_do_remove(V9fsState *s, V9fsString *path)
{
return s->ops->remove(&s->ctx, path->data);
}
static int v9fs_do_fsync(V9fsState *s, int fd)
{
return s->ops->fsync(&s->ctx, fd);
@ -1960,11 +1965,52 @@ static void v9fs_flush(V9fsState *s, V9fsPDU *pdu)
}
}
typedef struct V9fsRemoveState {
V9fsPDU *pdu;
size_t offset;
V9fsFidState *fidp;
} V9fsRemoveState;
static void v9fs_remove_post_remove(V9fsState *s, V9fsRemoveState *vs,
int err)
{
/* For TREMOVE we need to clunk the fid even on failed remove */
err = free_fid(s, vs->fidp->fid);
if (err < 0) {
goto out;
}
err = vs->offset;
out:
complete_pdu(s, vs->pdu, err);
qemu_free(vs);
}
static void v9fs_remove(V9fsState *s, V9fsPDU *pdu)
{
if (debug_9p_pdu) {
pprint_pdu(pdu);
int32_t fid;
V9fsRemoveState *vs;
int err = 0;
vs = qemu_malloc(sizeof(*vs));
vs->pdu = pdu;
vs->offset = 7;
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
vs->fidp = lookup_fid(s, fid);
if (vs->fidp == NULL) {
err = -EINVAL;
goto out;
}
err = v9fs_do_remove(s, &vs->fidp->path);
v9fs_remove_post_remove(s, vs, err);
return;
out:
complete_pdu(s, pdu, err);
qemu_free(vs);
}
typedef struct V9fsWstatState