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hw/9pfs: Add new security model mapped-file.

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This enable us to do passthrough equivalent security model on NFS directory.
NFS server mostly do root squashing and don't support xattr. Hence we cannot
use 'passthrough' or 'mapped' security model

Also added "mapped-xattr" security to indicate earlier "mapped" security model
Older name is still supported.

POSIX rules regarding ctime update on chmod are not followed by this security model.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
This commit is contained in:
Aneesh Kumar K.V 2012-01-19 12:21:11 +05:30
parent 8c4ec5c026
commit 2c30dd744a
5 changed files with 378 additions and 25 deletions
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9
hw/9pfs/virtio-9p-device.c
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@ -91,15 +91,6 @@ VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf)
s->ctx.fs_root = NULL;
}
s->ctx.exops.get_st_gen = NULL;
if (fse->export_flags & V9FS_SM_PASSTHROUGH) {
s->ctx.xops = passthrough_xattr_ops;
} else if (fse->export_flags & V9FS_SM_MAPPED) {
s->ctx.xops = mapped_xattr_ops;
} else if (fse->export_flags & V9FS_SM_NONE) {
s->ctx.xops = none_xattr_ops;
}
len = strlen(conf->tag);
if (len > MAX_TAG_LEN - 1) {
fprintf(stderr, "mount tag '%s' (%d bytes) is longer than "