--- /dev/null
+#ifndef _VX_BASE_H
+#define _VX_BASE_H
+
+
+/* context state changes */
+
+enum {
+ VSC_STARTUP = 1,
+ VSC_SHUTDOWN,
+
+ VSC_NETUP,
+ VSC_NETDOWN,
+};
+
+
+#define MAX_S_CONTEXT 65535 /* Arbitrary limit */
+
+#ifdef CONFIG_VSERVER_DYNAMIC_IDS
+#define MIN_D_CONTEXT 49152 /* dynamic contexts start here */
+#else
+#define MIN_D_CONTEXT 65536
+#endif
+
+/* check conditions */
+
+#define VS_ADMIN 0x0001
+#define VS_WATCH 0x0002
+#define VS_HIDE 0x0004
+#define VS_HOSTID 0x0008
+
+#define VS_IDENT 0x0010
+#define VS_EQUIV 0x0020
+#define VS_PARENT 0x0040
+#define VS_CHILD 0x0080
+
+#define VS_ARG_MASK 0x00F0
+
+#define VS_DYNAMIC 0x0100
+#define VS_STATIC 0x0200
+
+#define VS_ATR_MASK 0x0F00
+
+#ifdef CONFIG_VSERVER_PRIVACY
+#define VS_ADMIN_P (0)
+#define VS_WATCH_P (0)
+#else
+#define VS_ADMIN_P VS_ADMIN
+#define VS_WATCH_P VS_WATCH
+#endif
+
+#define VS_HARDIRQ 0x1000
+#define VS_SOFTIRQ 0x2000
+#define VS_IRQ 0x4000
+
+#define VS_IRQ_MASK 0xF000
+
+#include <linux/hardirq.h>
+
+/*
+ * check current context for ADMIN/WATCH and
+ * optionally against supplied argument
+ */
+static inline int __vs_check(int cid, int id, unsigned int mode)
+{
+ if (mode & VS_ARG_MASK) {
+ if ((mode & VS_IDENT) &&
+ (id == cid))
+ return 1;
+ }
+ if (mode & VS_ATR_MASK) {
+ if ((mode & VS_DYNAMIC) &&
+ (id >= MIN_D_CONTEXT) &&
+ (id <= MAX_S_CONTEXT))
+ return 1;
+ if ((mode & VS_STATIC) &&
+ (id > 1) && (id < MIN_D_CONTEXT))
+ return 1;
+ }
+ if (mode & VS_IRQ_MASK) {
+ if ((mode & VS_IRQ) && unlikely(in_interrupt()))
+ return 1;
+ if ((mode & VS_HARDIRQ) && unlikely(in_irq()))
+ return 1;
+ if ((mode & VS_SOFTIRQ) && unlikely(in_softirq()))
+ return 1;
+ }
+ return (((mode & VS_ADMIN) && (cid == 0)) ||
+ ((mode & VS_WATCH) && (cid == 1)) ||
+ ((mode & VS_HOSTID) && (id == 0)));
+}
+
+#define vx_task_xid(t) ((t)->xid)
+
+#define vx_current_xid() vx_task_xid(current)
+
+#define current_vx_info() (current->vx_info)
+
+
+#define vx_check(c,m) __vs_check(vx_current_xid(),c,(m)|VS_IRQ)
+
+#define vx_weak_check(c,m) ((m) ? vx_check(c,m) : 1)
+
+
+#define nx_task_nid(t) ((t)->nid)
+
+#define nx_current_nid() nx_task_nid(current)
+
+#define current_nx_info() (current->nx_info)
+
+
+#define nx_check(c,m) __vs_check(nx_current_nid(),c,m)
+
+#define nx_weak_check(c,m) ((m) ? nx_check(c,m) : 1)
+
+
+
+/* generic flag merging */
+
+#define vs_check_flags(v,m,f) (((v) & (m)) ^ (f))
+
+#define vs_mask_flags(v,f,m) (((v) & ~(m)) | ((f) & (m)))
+
+#define vs_mask_mask(v,f,m) (((v) & ~(m)) | ((v) & (f) & (m)))
+
+#define vs_check_bit(v,n) ((v) & (1LL << (n)))
+
+
+/* context flags */
+
+#define __vx_flags(v) ((v) ? (v)->vx_flags : 0)
+
+#define vx_current_flags() __vx_flags(current->vx_info)
+
+#define vx_info_flags(v,m,f) \
+ vs_check_flags(__vx_flags(v),(m),(f))
+
+#define task_vx_flags(t,m,f) \
+ ((t) && vx_info_flags((t)->vx_info, (m), (f)))
+
+#define vx_flags(m,f) vx_info_flags(current->vx_info,(m),(f))
+
+
+/* context caps */
+
+#define __vx_ccaps(v) ((v) ? (v)->vx_ccaps : 0)
+
+#define vx_current_ccaps() __vx_ccaps(current->vx_info)
+
+#define vx_info_ccaps(v,c) (__vx_ccaps(v) & (c))
+
+#define vx_ccaps(c) vx_info_ccaps(current->vx_info,(c))
+
+
+
+/* network flags */
+
+#define __nx_flags(v) ((v) ? (v)->nx_flags : 0)
+
+#define nx_current_flags() __nx_flags(current->nx_info)
+
+#define nx_info_flags(v,m,f) \
+ vs_check_flags(__nx_flags(v),(m),(f))
+
+#define task_nx_flags(t,m,f) \
+ ((t) && nx_info_flags((t)->nx_info, (m), (f)))
+
+#define nx_flags(m,f) nx_info_flags(current->nx_info,(m),(f))
+
+
+/* network caps */
+
+#define __nx_ncaps(v) ((v) ? (v)->nx_ncaps : 0)
+
+#define nx_current_ncaps() __nx_ncaps(current->nx_info)
+
+#define nx_info_ncaps(v,c) (__nx_ncaps(v) & (c))
+
+#define nx_ncaps(c) nx_info_ncaps(current->nx_info,(c))
+
+
+/* context mask capabilities */
+
+#define __vx_mcaps(v) ((v) ? (v)->vx_ccaps >> 32UL : ~0 )
+
+#define vx_info_mcaps(v,c) (__vx_mcaps(v) & (c))
+
+#define vx_mcaps(c) vx_info_mcaps(current->vx_info,(c))
+
+
+/* context bcap mask */
+
+#define __vx_bcaps(v) ((v) ? (v)->vx_bcaps : ~0 )
+
+#define vx_current_bcaps() __vx_bcaps(current->vx_info)
+
+#define vx_info_bcaps(v,c) (__vx_bcaps(v) & (c))
+
+#define vx_bcaps(c) vx_info_bcaps(current->vx_info,(c))
+
+
+#define vx_info_cap_bset(v) ((v) ? (v)->vx_cap_bset : cap_bset)
+
+#define vx_current_cap_bset() vx_info_cap_bset(current->vx_info)
+
+
+#define __vx_info_mbcap(v,b) \
+ (!vx_info_flags(v, VXF_STATE_SETUP, 0) ? \
+ vx_info_bcaps(v, b) : (b))
+
+#define vx_info_mbcap(v,b) __vx_info_mbcap(v,cap_t(b))
+
+#define task_vx_mbcap(t,b) \
+ vx_info_mbcap((t)->vx_info, (t)->b)
+
+#define vx_mbcap(b) task_vx_mbcap(current,b)
+
+#define vx_cap_raised(v,c,f) (vx_info_mbcap(v,c) & CAP_TO_MASK(f))
+
+#define vx_capable(b,c) (capable(b) || \
+ (cap_raised(current->cap_effective,b) && vx_ccaps(c)))
+
+
+#define vx_current_initpid(n) \
+ (current->vx_info && \
+ (current->vx_info->vx_initpid == (n)))
+
+
+#define __vx_state(v) ((v) ? ((v)->vx_state) : 0)
+
+#define vx_info_state(v,m) (__vx_state(v) & (m))
+
+
+#define __nx_state(v) ((v) ? ((v)->nx_state) : 0)
+
+#define nx_info_state(v,m) (__nx_state(v) & (m))
+
+#endif
git://git.onelab.eu / linux-2.6.git / blobdiff