X-Git-Url: http://git.linux-vserver.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fvserver.h;h=a6708a7e06e100fa360669ed2f6ab7e7c66b5faa;hb=0d4cba12770c5b09a3380f456a6a2f6787042ee7;hp=b704b172376dc946143c446b284d4522c2165ab1;hpb=de1587ade0cb90cefe81838fa3e5480a4b90e08e;p=util-vserver.git diff --git a/lib/vserver.h b/lib/vserver.h index b704b17..a6708a7 100644 --- a/lib/vserver.h +++ b/lib/vserver.h @@ -28,6 +28,7 @@ #include #include #include +#include #ifndef IS_DOXYGEN #if defined(__GNUC__) @@ -230,6 +231,11 @@ // the network flags #define VC_NXF_INFO_LOCK 0x00000001ull +#define VC_NXF_INFO_PRIVATE 0x00000008ull + +#define VC_NXF_SINGLE_IP 0x00000100ull + +#define VC_NXF_HIDE_NETIF 0x02000000ull #define VC_NXF_STATE_SETUP (1ULL<<32) #define VC_NXF_STATE_ADMIN (1ULL<<34) @@ -238,6 +244,40 @@ #define VC_NXF_PERSISTENT (1ULL<<38) +// the vserver specific limits +#define VC_VLIMIT_NSOCK 16 +#define VC_VLIMIT_OPENFD 17 +#define VC_VLIMIT_ANON 18 +#define VC_VLIMIT_SHMEM 19 +#define VC_VLIMIT_SEMARY 20 +#define VC_VLIMIT_NSEMS 21 +#define VC_VLIMIT_DENTRY 22 +#define VC_VLIMIT_MAPPED 23 + + +// the VCI bit values +#define VC_VCI_NO_DYNAMIC (1 << 0) +#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 + + +#ifndef CLONE_NEWNS +# define CLONE_NEWNS 0x00020000 +#endif +#ifndef CLONE_NEWUTS +# define CLONE_NEWUTS 0x04000000 +#endif +#ifndef CLONE_NEWIPC +# define CLONE_NEWIPC 0x08000000 +#endif + + #define VC_BAD_PERSONALITY ((uint_least32_t)(-1)) @@ -260,11 +300,6 @@ typedef an_unsigned_integer_type nid_t; extern "C" { #endif - struct vc_ip_mask_pair { - uint32_t ip; - uint32_t mask; - }; - /** \brief The generic vserver syscall * \ingroup syscalls * @@ -277,14 +312,20 @@ extern "C" { * \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(); + /** \brief Moves current process into a context * \ingroup syscalls * @@ -302,12 +343,17 @@ extern "C" { * 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. @@ -318,6 +364,18 @@ extern "C" { * 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 * @@ -329,14 +387,101 @@ extern "C" { * * \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 * \returns 0 on success, -1 on errors */ - int vc_ctx_migrate(xid_t xid); + int vc_ctx_migrate(xid_t xid); + + /** \brief Statistics about a context */ + struct vc_ctx_stat { + uint_least32_t usecnt; ///< number of uses + uint_least32_t tasks; ///< number of tasks + }; + + /** \brief Get some statistics about a context. + * \ingroup syscalls + * + * \param xid The context to get stats about + * \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)); + + /** \brief Contains further statistics about a context. */ + struct vc_virt_stat { + uint_least64_t offset; + uint_least32_t uptime; + uint_least32_t nr_threads; + uint_least32_t nr_running; + uint_least32_t nr_uninterruptible; + uint_least32_t nr_onhold; + uint_least32_t nr_forks; + uint_least32_t load[3]; + }; + + /** \brief Get more statistics about a context. + * \ingroup syscalls + * + * \param xid The context to get stats about + * \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)); + + /** \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 */ @@ -351,6 +496,17 @@ extern "C" { * resource; it might be bytes, pages, seconds or litres of beer. */ typedef uint_least64_t vc_limit_t; + /** \brief Masks describing the supported limits. */ + struct vc_rlimit_mask { + uint_least32_t min; ///< masks the resources supporting a minimum limit + uint_least32_t soft; ///< masks the resources supporting a soft limit + uint_least32_t hard; ///< masks the resources supporting a hard limit + }; + + /** \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. */ @@ -360,13 +516,6 @@ extern "C" { 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 soft; ///< masks the resources supporting a soft limit - uint_least32_t hard; ///< masks the resources supporting a hard limit - }; - /** \brief Returns the limits of \a resource. * \ingroup syscalls * @@ -375,7 +524,7 @@ extern "C" { * \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 @@ -385,10 +534,36 @@ extern "C" { * \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 xid The id of the context + * \param resource The resource which will be queried + * \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, + struct vc_rlimit_stat /*@out@*/ *stat) VC_ATTR_NONNULL((3)); + + /** \brief Resets the minimum and maximum observed values of all resources. + * \ingroup syscalls + * + * \param xid The id of the context + * + * \returns 0 on success, and -1 on errors. */ + int vc_reset_minmax(xid_t xid); + /** \brief Parses a string describing a limit * \ingroup helper * @@ -408,18 +583,10 @@ extern "C" { * * \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; }; @@ -438,21 +605,20 @@ extern "C" { 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; @@ -462,7 +628,7 @@ extern "C" { 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)); @@ -496,23 +662,24 @@ extern "C" { 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; @@ -522,41 +689,59 @@ extern "C" { 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); - - int vc_enter_namespace(xid_t xid); - int vc_set_namespace(); + /* 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(); - - /** \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; + + /* 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 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; + /** 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((1,4)); + + /* misc. 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; }; + int vc_set_sched(xid_t xid, struct vc_set_sched const *) VC_ATTR_NONNULL((2)); + + int vc_set_mapping(xid_t xid, const char *device, const char *target, uint32_t flags); + + /** \brief Information about parsing errors * \ingroup helper */ @@ -564,12 +749,6 @@ extern "C" { 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 @@ -685,67 +864,7 @@ extern "C" { 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 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, @@ -764,6 +883,10 @@ extern "C" { 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 @@ -776,6 +899,8 @@ extern "C" { /** Maps an xid given at '--xid' options to an xid_t */ xid_t vc_xidopt2xid(char const *, bool honor_static, char const **err_info); + /** Maps a nid given at '--nid' options to a nid_t */ + nid_t vc_nidopt2nid(char const *, bool honor_static, char const **err_info); vcCfgStyle vc_getVserverCfgStyle(char const *id);