-/* $Id: vserver.h 2415 2006-12-08 13:24:49Z dhozac $
+/* $Id: vserver.h 2501 2007-02-20 17:33:35Z dhozac $
* Copyright (C) 2003 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
*
#define VC_VXSM_IDLE_TIME 0x0200
#define VC_VXSM_FORCE 0x0400
+#define VC_VXSM_MSEC 0x4000
#define VC_VXSM_V3_MASK 0x0173
#define VC_VCI_SPACES (1 << 10)
+// the device mapping flags
+#define VC_DATTR_CREATE 0x00000001
+#define VC_DATTR_OPEN 0x00000002
+
+#define VC_DATTR_REMAP 0x00000010
+
+
+// the process context migration flags
+#define VC_VXM_SET_INIT 0x00000001
+#define VC_VXM_SET_REAPER 0x00000002
+
+
#ifndef CLONE_NEWNS
# define CLONE_NEWNS 0x00020000
#endif
extern "C" {
#endif
- struct vc_ip_mask_pair {
- uint32_t ip;
- uint32_t mask;
- };
-
/** \brief The generic vserver syscall
* \ingroup syscalls
*
* \param data additional arguments; depends on \c cmd
* \returns depends on \c cmd; usually, -1 stands for an error
*/
- int vc_syscall(uint32_t cmd, xid_t xid, void *data);
+ int vc_syscall(uint32_t cmd, xid_t xid, void *data);
/** \brief Returns the version of the current kernel API.
* \ingroup syscalls
* \returns The versionnumber of the kernel API
*/
- int vc_get_version();
+ int vc_get_version();
/** \brief Returns the kernel configuration bits
* \ingroup syscalls
* \returns The kernel configuration bits
*/
- int vc_get_vci();
-
+ int vc_get_vci();
+
/** \brief Moves current process into a context
* \ingroup syscalls
*
* will be set appropriately
*
* See http://vserver.13thfloor.at/Stuff/Logic.txt for details */
- xid_t vc_new_s_context(xid_t ctx, unsigned int remove_cap, unsigned int flags);
+ xid_t vc_new_s_context(xid_t ctx, unsigned int remove_cap, unsigned int flags);
+
+ struct vc_ip_mask_pair {
+ uint32_t ip;
+ uint32_t mask;
+ };
/** \brief Sets the ipv4root information.
* \ingroup syscalls
* \pre \a nb < NB_IPV4ROOT && \a ips != 0 */
- int vc_set_ipv4root(uint32_t bcast, size_t nb,
+ int vc_set_ipv4root(uint32_t bcast, size_t nb,
struct vc_ip_mask_pair const *ips) VC_ATTR_NONNULL((3));
/** \brief Returns the value of NB_IPV4ROOT.
* running kernel. */
size_t vc_get_nb_ipv4root() VC_ATTR_CONST VC_ATTR_PURE;
+ /* process context */
+ /** \brief Flags of process-contexts
+ */
+ struct vc_ctx_flags {
+ /** \brief Mask of set context flags */
+ uint_least64_t flagword;
+ /** \brief Mask of set and unset context flags when used by set
+ * operations, or modifiable flags when used by get
+ * operations */
+ uint_least64_t mask;
+ };
+
/** \brief Creates a context without starting it.
* \ingroup syscalls
*
*
* \returns the xid of the created context, or VC_NOCTX on errors. \c errno
* will be set appropriately. */
- xid_t vc_ctx_create(xid_t xid);
+ xid_t vc_ctx_create(xid_t xid);
/** \brief Moves the current process into the specified context.
* \ingroup syscalls
*
- * \param xid The new context
+ * \param xid The new context
+ * \param flags The flags, see VC_VXM_*
* \returns 0 on success, -1 on errors */
- int vc_ctx_migrate(xid_t xid);
+ int vc_ctx_migrate(xid_t xid, uint_least64_t flags);
/** \brief Statistics about a context */
struct vc_ctx_stat {
* \param stat Where to store the result
*
* \returns 0 on success, -1 on errors. */
- int vc_ctx_stat(xid_t xid, struct vc_ctx_stat /*@out@*/ *stat) VC_ATTR_NONNULL((2));
+ int vc_ctx_stat(xid_t xid, struct vc_ctx_stat /*@out@*/ *stat) VC_ATTR_NONNULL((2));
/** \brief Contains further statistics about a context. */
struct vc_virt_stat {
uint_least64_t offset;
- uint_least32_t uptime;
+ uint_least64_t uptime;
uint_least32_t nr_threads;
uint_least32_t nr_running;
uint_least32_t nr_uninterruptible;
* \param stat Where to store the result
*
* \returns 0 on success, -1 on errors. */
- int vc_virt_stat(xid_t xid, struct vc_virt_stat /*@out@*/ *stat) VC_ATTR_NONNULL((2));
+ int vc_virt_stat(xid_t xid, struct vc_virt_stat /*@out@*/ *stat) VC_ATTR_NONNULL((2));
+
+ /** \brief Sends a signal to a context/pid
+ * \ingroup syscalls
+ *
+ * Special values for \a pid are:
+ * - -1 which means every process in ctx except the init-process
+ * - 0 which means every process in ctx inclusive the init-process */
+ int vc_ctx_kill(xid_t ctx, pid_t pid, int sig);
+
+ int vc_get_cflags(xid_t xid, struct vc_ctx_flags /*@out@*/ *) VC_ATTR_NONNULL((2));
+ int vc_set_cflags(xid_t xid, struct vc_ctx_flags /*@in@*/ const *) VC_ATTR_NONNULL((2));
+
+ /** \brief Capabilities of process-contexts */
+ struct vc_ctx_caps {
+ /** \brief Mask of set common system capabilities */
+ uint_least64_t bcaps;
+ /** \brief Mask of set and unset common system capabilities when used by
+ * set operations, or the modifiable capabilities when used by
+ * get operations */
+ uint_least64_t bmask;
+ /** \brief Mask of set process context capabilities */
+ uint_least64_t ccaps;
+ /** \brief Mask of set and unset process context capabilities when used
+ * by set operations, or the modifiable capabilities when used
+ * by get operations */
+ uint_least64_t cmask;
+ };
+
+ int vc_get_ccaps(xid_t xid, struct vc_ctx_caps *);
+ int vc_set_ccaps(xid_t xid, struct vc_ctx_caps const *);
+
+ struct vc_vx_info {
+ xid_t xid;
+ pid_t initpid;
+ };
+
+ int vc_get_vx_info(xid_t xid, struct vc_vx_info *info) VC_ATTR_NONNULL((2));
+
+ /** \brief Returns the context of the given process.
+ * \ingroup syscalls
+ *
+ * \param pid the process-id whose xid shall be determined;
+ * pid==0 means the current process.
+ * \returns the xid of process \c pid or -1 on errors
+ */
+ xid_t vc_get_task_xid(pid_t pid);
+
+ /** \brief Waits for the end of a context
+ * \ingroup syscalls
+ */
+ int vc_wait_exit(xid_t xid);
/* rlimit related functions */
* resource; it might be bytes, pages, seconds or litres of beer. */
typedef uint_least64_t vc_limit_t;
- /** \brief The limits of a resources.
- *
- * This is a triple consisting of a minimum, soft and hardlimit. */
- struct vc_rlimit {
- vc_limit_t min; ///< the guaranted minimum of a resources
- vc_limit_t soft; ///< the softlimit of a resource
- vc_limit_t hard; ///< the absolute hardlimit of a resource
- };
-
/** \brief Masks describing the supported limits. */
struct vc_rlimit_mask {
uint_least32_t min; ///< masks the resources supporting a minimum limit
uint_least32_t hard; ///< masks the resources supporting a hard limit
};
- /** \brief Statistics for a resource limit. */
- struct vc_rlimit_stat {
- uint_least32_t hits; ///< number of hits on the limit
- uint_least64_t value; ///< current value
- uint_least64_t minimum; ///< minimum value observed
- uint_least64_t maximum; ///< maximum value observed
+ /** \brief Returns the limits supported by the kernel */
+ int vc_get_rlimit_mask(xid_t xid,
+ struct vc_rlimit_mask /*@out@*/ *lim) VC_ATTR_NONNULL((2));
+
+ /** \brief The limits of a resources.
+ *
+ * This is a triple consisting of a minimum, soft and hardlimit. */
+ struct vc_rlimit {
+ vc_limit_t min; ///< the guaranted minimum of a resources
+ vc_limit_t soft; ///< the softlimit of a resource
+ vc_limit_t hard; ///< the absolute hardlimit of a resource
};
/** \brief Returns the limits of \a resource.
* \param lim The result which will be filled with the limits
*
* \returns 0 on success, and -1 on errors. */
- int vc_get_rlimit(xid_t xid, int resource,
+ int vc_get_rlimit(xid_t xid, int resource,
struct vc_rlimit /*@out@*/ *lim) VC_ATTR_NONNULL((3));
/** \brief Sets the limits of \a resource.
* \ingroup syscalls
* \param lim The new limits
*
* \returns 0 on success, and -1 on errors. */
- int vc_set_rlimit(xid_t xid, int resource,
+ int vc_set_rlimit(xid_t xid, int resource,
struct vc_rlimit const /*@in@*/ *lim) VC_ATTR_NONNULL((3));
- int vc_get_rlimit_mask(xid_t xid,
- struct vc_rlimit_mask *lim) VC_ATTR_NONNULL((2));
+
+ /** \brief Statistics for a resource limit. */
+ struct vc_rlimit_stat {
+ uint_least32_t hits; ///< number of hits on the limit
+ vc_limit_t value; ///< current value
+ vc_limit_t minimum; ///< minimum value observed
+ vc_limit_t maximum; ///< maximum value observed
+ };
+
/** \brief Returns the current stats of \a resource.
* \ingroup syscalls
*
* \param stat The result which will be filled with the stats
*
* \returns 0 on success, and -1 on errors. */
- int vc_rlimit_stat(xid_t xid, int resource,
+ int vc_rlimit_stat(xid_t xid, int resource,
struct vc_rlimit_stat /*@out@*/ *stat) VC_ATTR_NONNULL((3));
- /** \brief Resets the minimum and maximum observed values for all resources.
+
+ /** \brief Resets the minimum and maximum observed values of all resources.
* \ingroup syscalls
*
- * \param xid The id of the context
+ * \param xid The id of the context
*
* \returns 0 on success, and -1 on errors. */
- int vc_reset_minmax(xid_t xid);
+ int vc_reset_minmax(xid_t xid);
+
/** \brief Parses a string describing a limit
* \ingroup helper
*
*
* \pre \a str!=0 && \a res!=0
*/
- bool vc_parseLimit(char const /*@in@*/ *str, vc_limit_t /*@out@*/ *res) VC_ATTR_NONNULL((1,2));
-
-
- /** \brief Sends a signal to a context/pid
- * \ingroup syscalls
- *
- * Special values for \a pid are:
- * - -1 which means every process in ctx except the init-process
- * - 0 which means every process in ctx inclusive the init-process */
- int vc_ctx_kill(xid_t ctx, pid_t pid, int sig);
+ bool vc_parseLimit(char const /*@in@*/ *str, vc_limit_t /*@out@*/ *res) VC_ATTR_NONNULL((1,2));
+ /* network context */
struct vc_nx_info {
nid_t nid;
};
uint32_t mask[4];
};
+ struct vc_net_flags {
+ uint_least64_t flagword;
+ uint_least64_t mask;
+ };
+
nid_t vc_net_create(nid_t nid);
int vc_net_migrate(nid_t nid);
int vc_net_add(nid_t nid, struct vc_net_nx const *info);
int vc_net_remove(nid_t nid, struct vc_net_nx const *info);
- struct vc_net_flags {
- uint_least64_t flagword;
- uint_least64_t mask;
- };
-
int vc_get_nflags(nid_t, struct vc_net_flags *);
int vc_set_nflags(nid_t, struct vc_net_flags const *);
-
struct vc_net_caps {
uint_least64_t ncaps;
uint_least64_t cmask;
int vc_set_ncaps(nid_t, struct vc_net_caps const *);
-
+ /* iattr related functions */
int vc_set_iattr(char const *filename, xid_t xid,
uint_least32_t flags, uint_least32_t mask) VC_ATTR_NONNULL((1));
int vc_get_iattr(char const *filename, xid_t * /*@null@*/ xid,
uint_least32_t * /*@null@*/ flags,
uint_least32_t * /*@null@*/ mask) VC_ATTR_NONNULL((1));
-
- struct vc_vx_info {
- xid_t xid;
- pid_t initpid;
- };
- /** \brief Returns the context of the given process.
- * \ingroup syscalls
- *
- * \param pid the process-id whose xid shall be determined;
- * pid==0 means the current process.
- * \returns the xid of process \c pid or -1 on errors
- */
- xid_t vc_get_task_xid(pid_t pid);
- int vc_get_vx_info(xid_t xid, struct vc_vx_info *info) VC_ATTR_NONNULL((2));
+ /** \brief Returns the context of \c filename
+ * \ingroup syscalls
+ *
+ * This function calls vc_get_iattr() with appropriate arguments to
+ * determine the context of \c filename. In error-case or when no context
+ * is assigned, \c VC_NOCTX will be returned. To differ between both cases,
+ * \c errno must be examined.
+ *
+ * \b WARNING: this function can modify \c errno although no error happened.
+ *
+ * \param filename The file to check
+ * \returns The assigned context, or VC_NOCTX when an error occured or no
+ * such assignment exists. \c errno will be 0 in the latter case */
+ xid_t vc_getfilecontext(char const *filename) VC_ATTR_NONNULL((1));
+ /* vhi related functions */
typedef enum { vcVHI_CONTEXT, vcVHI_SYSNAME, vcVHI_NODENAME,
vcVHI_RELEASE, vcVHI_VERSION, vcVHI_MACHINE,
vcVHI_DOMAINNAME } vc_uts_type;
int vc_get_vhi_name(xid_t xid, vc_uts_type type,
char *val, size_t len) VC_ATTR_NONNULL((3));
- /** Returns true iff \a xid is a dynamic xid */
- bool vc_is_dynamic_xid(xid_t xid);
-
+ /* namespace related functions */
int vc_enter_namespace(xid_t xid, uint_least64_t mask);
int vc_set_namespace(xid_t xid, uint_least64_t mask);
int vc_cleanup_namespace();
uint_least64_t vc_get_space_mask();
+
+ /* disk limit related things */
+ struct vc_ctx_dlimit {
+ uint_least32_t space_used;
+ uint_least32_t space_total;
+ uint_least32_t inodes_used;
+ uint_least32_t inodes_total;
+ uint_least32_t reserved;
+ };
- /** \brief Flags of process-contexts
- */
- struct vc_ctx_flags {
- /** \brief Mask of set context flags */
- uint_least64_t flagword;
- /** \brief Mask of set and unset context flags when used by set
- * operations, or modifiable flags when used by get
- * operations */
- uint_least64_t mask;
+
+ /** Add a disk limit to a file system. */
+ int vc_add_dlimit(char const *filename, xid_t xid,
+ uint_least32_t flags) VC_ATTR_NONNULL((1));
+ /** Remove a disk limit from a file system. */
+ int vc_rem_dlimit(char const *filename, xid_t xid,
+ uint_least32_t flags) VC_ATTR_NONNULL((1));
+
+ /** Set a disk limit. */
+ int vc_set_dlimit(char const *filename, xid_t xid,
+ uint_least32_t flags,
+ struct vc_ctx_dlimit const *limits) VC_ATTR_NONNULL((1,4));
+ /** Get a disk limit. */
+ int vc_get_dlimit(char const *filename, xid_t xid,
+ uint_least32_t flags,
+ struct vc_ctx_dlimit *limits) VC_ATTR_NONNULL((1));
+
+ /* scheduler related syscalls */
+ struct vc_set_sched {
+ uint_least32_t set_mask;
+ int_least32_t fill_rate;
+ int_least32_t interval;
+ int_least32_t fill_rate2;
+ int_least32_t interval2;
+ int_least32_t tokens;
+ int_least32_t tokens_min;
+ int_least32_t tokens_max;
+ int_least32_t priority_bias;
+ int_least32_t cpu_id;
+ int_least32_t bucket_id;
};
- /** \brief Capabilities of process-contexts */
- struct vc_ctx_caps {
- /** \brief Mask of set common system capabilities */
- uint_least64_t bcaps;
- /** \brief Mask of set and unset common system capabilities when used by
- * set operations, or the modifiable capabilities when used by
- * get operations */
- uint_least64_t bmask;
- /** \brief Mask of set process context capabilities */
- uint_least64_t ccaps;
- /** \brief Mask of set and unset process context capabilities when used
- * by set operations, or the modifiable capabilities when used
- * by get operations */
- uint_least64_t cmask;
+ int vc_set_sched(xid_t xid, struct vc_set_sched const *) VC_ATTR_NONNULL((2));
+
+ struct vc_sched_info {
+ int_least32_t cpu_id;
+ int_least32_t bucket_id;
+ uint_least64_t user_msec;
+ uint_least64_t sys_msec;
+ uint_least64_t hold_msec;
+ uint_least32_t token_usec;
+ int_least32_t vavavoom;
};
+ int vc_sched_info(xid_t xid, struct vc_sched_info *info) VC_ATTR_NONNULL((2));
+
+ /* misc. syscalls */
+ int vc_set_mapping(xid_t xid, const char *device, const char *target, uint32_t flags);
+
+
/** \brief Information about parsing errors
* \ingroup helper
*/
char const *ptr; ///< Pointer to the first character of an erroneous string
size_t len; ///< Length of the erroneous string
};
-
- int vc_get_cflags(xid_t xid, struct vc_ctx_flags *) VC_ATTR_NONNULL((2));
- int vc_set_cflags(xid_t xid, struct vc_ctx_flags const *) VC_ATTR_NONNULL((2));
-
- int vc_get_ccaps(xid_t xid, struct vc_ctx_caps *);
- int vc_set_ccaps(xid_t xid, struct vc_ctx_caps const *);
/** \brief Converts a single string into bcapability
* \ingroup helper
uint_least32_t vc_str2personalitytype(char const /*@in@*/*,
size_t len) VC_ATTR_NONNULL((1));
-
- /** \brief Returns the context of \c filename
- * \ingroup syscalls
- *
- * This function calls vc_get_iattr() with appropriate arguments to
- * determine the context of \c filename. In error-case or when no context
- * is assigned, \c VC_NOCTX will be returned. To differ between both cases,
- * \c errno must be examined.
- *
- * \b WARNING: this function can modify \c errno although no error happened.
- *
- * \param filename The file to check
- * \returns The assigned context, or VC_NOCTX when an error occured or no
- * such assignment exists. \c errno will be 0 in the latter case */
- xid_t vc_getfilecontext(char const *filename) VC_ATTR_NONNULL((1));
-
-
- struct vc_set_sched {
- uint_least32_t set_mask;
- int_least32_t fill_rate;
- int_least32_t interval;
- int_least32_t fill_rate2;
- int_least32_t interval2;
- int_least32_t tokens;
- int_least32_t tokens_min;
- int_least32_t tokens_max;
- int_least32_t priority_bias;
- int_least32_t cpu_id;
- int_least32_t bucket_id;
- };
- int vc_set_sched(xid_t xid, struct vc_set_sched const *);
-
-
- struct vc_ctx_dlimit {
- uint_least32_t space_used;
- uint_least32_t space_total;
- uint_least32_t inodes_used;
- uint_least32_t inodes_total;
- uint_least32_t reserved;
- };
-
-
- /** Add a disk limit to a file system. */
- int vc_add_dlimit(char const *filename, xid_t xid,
- uint_least32_t flags) VC_ATTR_NONNULL((1));
- /** Remove a disk limit from a file system. */
- int vc_rem_dlimit(char const *filename, xid_t xid,
- uint_least32_t flags) VC_ATTR_NONNULL((1));
-
- /** Set a disk limit. */
- int vc_set_dlimit(char const *filename, xid_t xid,
- uint_least32_t flags,
- struct vc_ctx_dlimit const *limits) VC_ATTR_NONNULL((1,4));
- /** Get a disk limit. */
- int vc_get_dlimit(char const *filename, xid_t xid,
- uint_least32_t flags,
- struct vc_ctx_dlimit *limits) VC_ATTR_NONNULL((1));
-
- /** \brief Waits for the end of a context
- * \ingroup syscalls
- */
- int vc_wait_exit(xid_t xid);
typedef enum { vcFEATURE_VKILL, vcFEATURE_IATTR, vcFEATURE_RLIMIT,
vcFEATURE_COMPAT, vcFEATURE_MIGRATE, vcFEATURE_NAMESPACE,
vcFEATURE_SCHED, vcFEATURE_VINFO, vcFEATURE_VHI,
vcFEATURE_VSHELPER0, vcFEATURE_VSHELPER, vcFEATURE_VWAIT,
- vcFEATURE_VNET }
+ vcFEATURE_VNET, vcFEATURE_VSTAT }
vcFeatureSet;
bool vc_isSupported(vcFeatureSet) VC_ATTR_CONST;
vcXidType vc_getXIDType(xid_t xid) VC_ATTR_CONST;
+ /** Returns true iff \a xid is a dynamic xid */
+ bool vc_is_dynamic_xid(xid_t xid);
+
+
/* The management part */
#define VC_LIMIT_VSERVER_NAME_LEN 1024
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