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virtio-9p: Security model for chmod 

Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Venkateswararao Jujjuri (JV) 2010-06-14 13:34:42 -07:00 committed by Anthony Liguori
parent 758e8e38eb
commit e95ead32ef
3 changed files with 12 additions and 6 deletions
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2
hw/file-op-9p.h
View File

@ -49,7 +49,7 @@ typedef struct FileOperations
{
int (*lstat)(FsContext *, const char *, struct stat *);
ssize_t (*readlink)(FsContext *, const char *, char *, size_t);
int (*chmod)(FsContext *, const char *, mode_t);
int (*chmod)(FsContext *, const char *, FsCred *);
int (*chown)(FsContext *, const char *, uid_t, gid_t);
int (*mknod)(FsContext *, const char *, mode_t, dev_t);
int (*mksock)(FsContext *, const char *);

11
hw/virtio-9p-local.c
View File

@ -129,9 +129,14 @@ static ssize_t local_writev(FsContext *ctx, int fd, const struct iovec *iov,
return writev(fd, iov, iovcnt);
}
static int local_chmod(FsContext *ctx, const char *path, mode_t mode)
static int local_chmod(FsContext *fs_ctx, const char *path, FsCred *credp)
{
return chmod(rpath(ctx, path), mode);
if (fs_ctx->fs_sm == SM_MAPPED) {
return local_set_xattr(rpath(fs_ctx, path), credp);
} else if (fs_ctx->fs_sm == SM_PASSTHROUGH) {
return chmod(rpath(fs_ctx, path), credp->fc_mode);
}
return -1;
}
static int local_mknod(FsContext *ctx, const char *path, mode_t mode, dev_t dev)
@ -253,8 +258,6 @@ static int local_remove(FsContext *ctx, const char *path)
static int local_fsync(FsContext *ctx, int fd)
{
if (0) /* Just to supress the warning. Will be removed in next patch. */
(void)local_set_xattr(NULL, NULL);
return fsync(fd);
}

5
hw/virtio-9p.c
View File

@ -154,7 +154,10 @@ static int v9fs_do_writev(V9fsState *s, int fd, const struct iovec *iov,
static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode)
{
return s->ops->chmod(&s->ctx, path->data, mode);
FsCred cred;
cred_init(&cred);
cred.fc_mode = mode;
return s->ops->chmod(&s->ctx, path->data, &cred);
}
static int v9fs_do_mknod(V9fsState *s, V9fsString *path, mode_t mode, dev_t dev)