3 * Copyright (C) 2003 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2, or (at your option)
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 * \brief The public interface of the the libvserver library.
24 #ifndef H_VSERVER_SYSCALL_H
25 #define H_VSERVER_SYSCALL_H
30 #include <sys/types.h>
34 # define VC_ATTR_UNUSED __attribute__((__unused__))
35 # define VC_ATTR_NORETURN __attribute__((__noreturn__))
36 # define VC_ATTR_CONST __attribute__((__const__))
37 # define VC_ATTR_DEPRECATED __attribute__((__deprecated__))
38 # if __GNUC__*0x10000 + __GNUC_MINOR__*0x100 + __GNUC_PATCHLEVEL__ >= 0x30300
39 # define VC_ATTR_NONNULL(ARGS) __attribute__((__nonnull__ ARGS))
40 # define VC_ATTR_ALWAYSINLINE __attribute__((__always_inline__))
42 # define VC_ATTR_NONNULL(ARGS)
43 # define VC_ATTR_ALWAYSINLINE
45 # if __GNUC__*0x10000 + __GNUC_MINOR__*0x100 + __GNUC_PATCHLEVEL__ >= 0x30303
46 # define VC_ATTR_PURE __attribute__((__pure__))
51 # define VC_ATTR_NONNULL(ARGS)
52 # define VC_ATTR_UNUSED
53 # define VC_ATTR_NORETURN
54 # define VC_ATTR_ALWAYSINLINE
55 # define VC_ATTR_DEPRECATED
57 # define VC_ATTR_CONST
61 /** the value which is returned in error-case (no ctx found) */
62 #define VC_NOCTX ((xid_t)(-1))
63 #define VC_NOXID ((xid_t)(-1))
64 /** the value which means a random (the next free) ctx */
65 #define VC_DYNAMIC_XID ((xid_t)(-1))
66 /** the value which means the current ctx */
67 #define VC_SAMECTX ((xid_t)(-2))
69 #define VC_NONID ((nid_t)(-1))
70 #define VC_DYNAMIC_NID ((nid_t)(-1))
72 #define VC_LIM_INFINITY (~0ULL)
73 #define VC_LIM_KEEP (~1ULL)
75 #define VC_CDLIM_UNSET (0U)
76 #define VC_CDLIM_INFINITY (~0U)
77 #define VC_CDLIM_KEEP (~1U)
79 #ifndef S_CTX_INFO_LOCK
80 # define S_CTX_INFO_LOCK 1
83 #ifndef S_CTX_INFO_SCHED
84 # define S_CTX_INFO_SCHED 2
87 #ifndef S_CTX_INFO_NPROC
88 # define S_CTX_INFO_NPROC 4
91 #ifndef S_CTX_INFO_PRIVATE
92 # define S_CTX_INFO_PRIVATE 8
95 #ifndef S_CTX_INFO_INIT
96 # define S_CTX_INFO_INIT 16
99 #ifndef S_CTX_INFO_HIDEINFO
100 # define S_CTX_INFO_HIDEINFO 32
103 #ifndef S_CTX_INFO_ULIMIT
104 # define S_CTX_INFO_ULIMIT 64
107 #ifndef S_CTX_INFO_NAMESPACE
108 # define S_CTX_INFO_NAMESPACE 128
111 #define VC_CAP_CHOWN 0
112 #define VC_CAP_DAC_OVERRIDE 1
113 #define VC_CAP_DAC_READ_SEARCH 2
114 #define VC_CAP_FOWNER 3
115 #define VC_CAP_FSETID 4
116 #define VC_CAP_KILL 5
117 #define VC_CAP_SETGID 6
118 #define VC_CAP_SETUID 7
119 #define VC_CAP_SETPCAP 8
120 #define VC_CAP_LINUX_IMMUTABLE 9
121 #define VC_CAP_NET_BIND_SERVICE 10
122 #define VC_CAP_NET_BROADCAST 11
123 #define VC_CAP_NET_ADMIN 12
124 #define VC_CAP_NET_RAW 13
125 #define VC_CAP_IPC_LOCK 14
126 #define VC_CAP_IPC_OWNER 15
127 #define VC_CAP_SYS_MODULE 16
128 #define VC_CAP_SYS_RAWIO 17
129 #define VC_CAP_SYS_CHROOT 18
130 #define VC_CAP_SYS_PTRACE 19
131 #define VC_CAP_SYS_PACCT 20
132 #define VC_CAP_SYS_ADMIN 21
133 #define VC_CAP_SYS_BOOT 22
134 #define VC_CAP_SYS_NICE 23
135 #define VC_CAP_SYS_RESOURCE 24
136 #define VC_CAP_SYS_TIME 25
137 #define VC_CAP_SYS_TTY_CONFIG 26
138 #define VC_CAP_MKNOD 27
139 #define VC_CAP_LEASE 28
140 #define VC_CAP_AUDIT_WRITE 29
141 #define VC_CAP_AUDIT_CONTROL 30
143 #define VC_IMMUTABLE_FILE_FL 0x0000010lu
144 #define VC_IMMUTABLE_LINK_FL 0x0008000lu
145 #define VC_IMMUTABLE_ALL (VC_IMMUTABLE_LINK_FL|VC_IMMUTABLE_FILE_FL)
147 #define VC_IATTR_XID 0x01000000u
149 #define VC_IATTR_ADMIN 0x00000001u
150 #define VC_IATTR_WATCH 0x00000002u
151 #define VC_IATTR_HIDE 0x00000004u
152 #define VC_IATTR_FLAGS 0x00000007u
154 #define VC_IATTR_BARRIER 0x00010000u
155 #define VC_IATTR_IUNLINK 0x00020000u
156 #define VC_IATTR_IMMUTABLE 0x00040000u
160 #define VC_VXF_INFO_LOCK 0x00000001ull
161 #define VC_VXF_INFO_NPROC 0x00000004ull
162 #define VC_VXF_INFO_PRIVATE 0x00000008ull
163 #define VC_VXF_INFO_INIT 0x00000010ull
165 #define VC_VXF_INFO_HIDEINFO 0x00000020ull
166 #define VC_VXF_INFO_ULIMIT 0x00000040ull
167 #define VC_VXF_INFO_NAMESPACE 0x00000080ull
169 #define VC_VXF_SCHED_HARD 0x00000100ull
170 #define VC_VXF_SCHED_PRIO 0x00000200ull
171 #define VC_VXF_SCHED_PAUSE 0x00000400ull
173 #define VC_VXF_VIRT_MEM 0x00010000ull
174 #define VC_VXF_VIRT_UPTIME 0x00020000ull
175 #define VC_VXF_VIRT_CPU 0x00040000ull
176 #define VC_VXF_VIRT_LOAD 0x00080000ull
177 #define VC_VXF_VIRT_TIME 0x00100000ull
179 #define VC_VXF_HIDE_MOUNT 0x01000000ull
180 #define VC_VXF_HIDE_NETIF 0x02000000ull
181 #define VC_VXF_HIDE_VINFO 0x04000000ull
183 #define VC_VXF_STATE_SETUP (1ULL<<32)
184 #define VC_VXF_STATE_INIT (1ULL<<33)
185 #define VC_VXF_STATE_ADMIN (1ULL<<34)
187 #define VC_VXF_SC_HELPER (1ULL<<36)
188 #define VC_VXF_REBOOT_KILL (1ULL<<37)
189 #define VC_VXF_PERSISTENT (1ULL<<38)
191 #define VC_VXF_FORK_RSS (1ULL<<48)
192 #define VC_VXF_PROLIFIC (1ULL<<49)
194 #define VC_VXF_IGNEG_NICE (1ULL<<52)
198 #define VC_VXC_SET_UTSNAME 0x00000001ull
199 #define VC_VXC_SET_RLIMIT 0x00000002ull
201 #define VC_VXC_RAW_ICMP 0x00000100ull
202 #define VC_VXC_SYSLOG 0x00001000ull
204 #define VC_VXC_SECURE_MOUNT 0x00010000ull
205 #define VC_VXC_SECURE_REMOUNT 0x00020000ull
206 #define VC_VXC_BINARY_MOUNT 0x00040000ull
208 #define VC_VXC_QUOTA_CTL 0x00100000ull
209 #define VC_VXC_ADMIN_MAPPER 0x00200000ull
210 #define VC_VXC_ADMIN_CLOOP 0x00400000ull
213 // the scheduler flags
214 #define VC_VXSM_FILL_RATE 0x0001
215 #define VC_VXSM_INTERVAL 0x0002
216 #define VC_VXSM_FILL_RATE2 0x0004
217 #define VC_VXSM_INTERVAL2 0x0008
218 #define VC_VXSM_TOKENS 0x0010
219 #define VC_VXSM_TOKENS_MIN 0x0020
220 #define VC_VXSM_TOKENS_MAX 0x0040
221 #define VC_VXSM_PRIO_BIAS 0x0100
222 #define VC_VXSM_CPU_ID 0x1000
223 #define VC_VXSM_BUCKET_ID 0x2000
225 #define VC_VXSM_IDLE_TIME 0x0200
226 #define VC_VXSM_FORCE 0x0400
228 #define VC_VXSM_V3_MASK 0x0173
232 #define VC_NXF_INFO_LOCK 0x00000001ull
233 #define VC_NXF_INFO_PRIVATE 0x00000008ull
235 #define VC_NXF_SINGLE_IP 0x00000100ull
237 #define VC_NXF_HIDE_NETIF 0x02000000ull
239 #define VC_NXF_STATE_SETUP (1ULL<<32)
240 #define VC_NXF_STATE_ADMIN (1ULL<<34)
242 #define VC_NXF_SC_HELPER (1ULL<<36)
243 #define VC_NXF_PERSISTENT (1ULL<<38)
246 // the vserver specific limits
247 #define VC_VLIMIT_NSOCK 16
248 #define VC_VLIMIT_OPENFD 17
249 #define VC_VLIMIT_ANON 18
250 #define VC_VLIMIT_SHMEM 19
251 #define VC_VLIMIT_SEMARY 20
252 #define VC_VLIMIT_NSEMS 21
253 #define VC_VLIMIT_DENTRY 22
254 #define VC_VLIMIT_MAPPED 23
258 #define VC_BAD_PERSONALITY ((uint_least32_t)(-1))
261 /** \defgroup syscalls Syscall wrappers
262 * Functions which are calling the vserver syscall directly. */
264 /** \defgroup helper Helper functions
265 * Functions which are doing general helper tasks like parameter parsing. */
267 /** \typedef an_unsigned_integer_type xid_t
268 * The identifier of a context. */
271 typedef an_unsigned_integer_type xid_t;
272 typedef an_unsigned_integer_type nid_t;
279 struct vc_ip_mask_pair {
284 /** \brief The generic vserver syscall
287 * This function executes the generic vserver syscall. It uses the
288 * correct syscallnumber (which may differ between the different
291 * \param cmd the command to be executed
292 * \param xid the xid on which the cmd shall be applied
293 * \param data additional arguments; depends on \c cmd
294 * \returns depends on \c cmd; usually, -1 stands for an error
296 int vc_syscall(uint32_t cmd, xid_t xid, void *data);
298 /** \brief Returns the version of the current kernel API.
300 * \returns The versionnumber of the kernel API
302 int vc_get_version();
304 /** \brief Returns the kernel configuration bits
306 * \returns The kernel configuration bits
310 /** \brief Moves current process into a context
313 * Puts current process into context \a ctx, removes the capabilities
314 * given in \a remove_cap and sets \a flags.
316 * \param ctx The new context; special values for are
317 * - VC_SAMECTX which means the current context (just for changing caps and flags)
318 * - VC_DYNAMIC_XID which means the next free context; this value can be used by
319 * ordinary users also
320 * \param remove_cap The linux capabilities which will be \b removed.
321 * \param flags Special flags which will be set.
323 * \returns The new context-id, or VC_NOCTX on errors; \c errno
324 * will be set appropriately
326 * See http://vserver.13thfloor.at/Stuff/Logic.txt for details */
327 xid_t vc_new_s_context(xid_t ctx, unsigned int remove_cap, unsigned int flags);
329 /** \brief Sets the ipv4root information.
331 * \pre \a nb < NB_IPV4ROOT && \a ips != 0 */
332 int vc_set_ipv4root(uint32_t bcast, size_t nb,
333 struct vc_ip_mask_pair const *ips) VC_ATTR_NONNULL((3));
335 /** \brief Returns the value of NB_IPV4ROOT.
338 * This function returns the value of NB_IPV4ROOT which was used when the
339 * library was built, but \b not the value which is used by the currently
341 size_t vc_get_nb_ipv4root() VC_ATTR_CONST VC_ATTR_PURE;
343 /** \brief Creates a context without starting it.
346 * This functions initializes a new context. When already in a freshly
347 * created context, this old context will be discarded.
349 * \param xid The new context; special values are:
350 * - VC_DYNAMIC_XID which means to create a dynamic context
352 * \returns the xid of the created context, or VC_NOCTX on errors. \c errno
353 * will be set appropriately. */
354 xid_t vc_ctx_create(xid_t xid);
356 /** \brief Moves the current process into the specified context.
359 * \param xid The new context
360 * \returns 0 on success, -1 on errors */
361 int vc_ctx_migrate(xid_t xid);
363 /** \brief Statistics about a context */
365 uint_least32_t usecnt; ///< number of uses
366 uint_least32_t tasks; ///< number of tasks
369 /** \brief Get some statistics about a context.
372 * \param xid The context to get stats about
373 * \param stat Where to store the result
375 * \returns 0 on success, -1 on errors. */
376 int vc_ctx_stat(xid_t xid, struct vc_ctx_stat /*@out@*/ *stat) VC_ATTR_NONNULL((2));
378 /** \brief Contains further statistics about a context. */
379 struct vc_virt_stat {
380 uint_least64_t offset;
381 uint_least32_t uptime;
382 uint_least32_t nr_threads;
383 uint_least32_t nr_running;
384 uint_least32_t nr_uninterruptible;
385 uint_least32_t nr_onhold;
386 uint_least32_t nr_forks;
387 uint_least32_t load[3];
390 /** \brief Get more statistics about a context.
393 * \param xid The context to get stats about
394 * \param stat Where to store the result
396 * \returns 0 on success, -1 on errors. */
397 int vc_virt_stat(xid_t xid, struct vc_virt_stat /*@out@*/ *stat) VC_ATTR_NONNULL((2));
399 /* rlimit related functions */
401 /** \brief The type which is used for a single limit value.
404 * - VC_LIM_INFINITY ... which is the infinite value
405 * - VC_LIM_KEEP ... which is used to mark values which shall not be
406 * modified by the vc_set_rlimit() operation.
408 * Else, the interpretation of the value depends on the corresponding
409 * resource; it might be bytes, pages, seconds or litres of beer. */
410 typedef uint_least64_t vc_limit_t;
412 /** \brief The limits of a resources.
414 * This is a triple consisting of a minimum, soft and hardlimit. */
416 vc_limit_t min; ///< the guaranted minimum of a resources
417 vc_limit_t soft; ///< the softlimit of a resource
418 vc_limit_t hard; ///< the absolute hardlimit of a resource
421 /** \brief Masks describing the supported limits. */
422 struct vc_rlimit_mask {
423 uint_least32_t min; ///< masks the resources supporting a minimum limit
424 uint_least32_t soft; ///< masks the resources supporting a soft limit
425 uint_least32_t hard; ///< masks the resources supporting a hard limit
428 /** \brief Statistics for a resource limit. */
429 struct vc_rlimit_stat {
430 uint_least32_t hits; ///< number of hits on the limit
431 uint_least64_t value; ///< current value
432 uint_least64_t minimum; ///< minimum value observed
433 uint_least64_t maximum; ///< maximum value observed
436 /** \brief Returns the limits of \a resource.
439 * \param xid The id of the context
440 * \param resource The resource which will be queried
441 * \param lim The result which will be filled with the limits
443 * \returns 0 on success, and -1 on errors. */
444 int vc_get_rlimit(xid_t xid, int resource,
445 struct vc_rlimit /*@out@*/ *lim) VC_ATTR_NONNULL((3));
446 /** \brief Sets the limits of \a resource.
449 * \param xid The id of the context
450 * \param resource The resource which will be queried
451 * \param lim The new limits
453 * \returns 0 on success, and -1 on errors. */
454 int vc_set_rlimit(xid_t xid, int resource,
455 struct vc_rlimit const /*@in@*/ *lim) VC_ATTR_NONNULL((3));
456 int vc_get_rlimit_mask(xid_t xid,
457 struct vc_rlimit_mask *lim) VC_ATTR_NONNULL((2));
458 /** \brief Returns the current stats of \a resource.
461 * \param xid The id of the context
462 * \param resource The resource which will be queried
463 * \param stat The result which will be filled with the stats
465 * \returns 0 on success, and -1 on errors. */
466 int vc_rlimit_stat(xid_t xid, int resource,
467 struct vc_rlimit_stat /*@out@*/ *stat) VC_ATTR_NONNULL((3));
468 /** \brief Resets the minimum and maximum observed values for all resources.
471 * \param xid The id of the context
473 * \returns 0 on success, and -1 on errors. */
474 int vc_reset_minmax(xid_t xid);
475 /** \brief Parses a string describing a limit
478 * This function parses \a str and interprets special words like \p "inf"
479 * or suffixes. Valid suffixes are
485 * \param str The string which shall be parsed
486 * \param res Will be filled with the interpreted value; in errorcase,
487 * this value is undefined.
489 * \returns \a true, iff the string \a str could be parsed. \a res will
490 * be filled with the interpreted value in this case.
492 * \pre \a str!=0 && \a res!=0
494 bool vc_parseLimit(char const /*@in@*/ *str, vc_limit_t /*@out@*/ *res) VC_ATTR_NONNULL((1,2));
497 /** \brief Sends a signal to a context/pid
500 * Special values for \a pid are:
501 * - -1 which means every process in ctx except the init-process
502 * - 0 which means every process in ctx inclusive the init-process */
503 int vc_ctx_kill(xid_t ctx, pid_t pid, int sig);
510 nid_t vc_get_task_nid(pid_t pid);
511 int vc_get_nx_info(nid_t nid, struct vc_nx_info *) VC_ATTR_NONNULL((2));
513 typedef enum { vcNET_IPV4=1, vcNET_IPV6=2,
514 vcNET_IPV4B=0x101, vcNET_IPV6B=0x102,
515 vcNET_ANY=~0 } vc_net_nx_type;
524 nid_t vc_net_create(nid_t nid);
525 int vc_net_migrate(nid_t nid);
527 int vc_net_add(nid_t nid, struct vc_net_nx const *info);
528 int vc_net_remove(nid_t nid, struct vc_net_nx const *info);
530 struct vc_net_flags {
531 uint_least64_t flagword;
535 int vc_get_nflags(nid_t, struct vc_net_flags *);
536 int vc_set_nflags(nid_t, struct vc_net_flags const *);
540 uint_least64_t ncaps;
541 uint_least64_t cmask;
544 int vc_get_ncaps(nid_t, struct vc_net_caps *);
545 int vc_set_ncaps(nid_t, struct vc_net_caps const *);
550 int vc_set_iattr(char const *filename, xid_t xid,
551 uint_least32_t flags, uint_least32_t mask) VC_ATTR_NONNULL((1));
553 /** \brief Returns information about attributes and assigned context of a file.
556 * This function returns the VC_IATTR_XXX flags and about the assigned
557 * context of a file. To request an information, the appropriate bit in
558 * \c mask must be set and the corresponding parameter (\a xid or \a
559 * flags) must not be NULL.
561 * E.g. to receive the assigned context, the \c VC_IATTR_XID bit must be
562 * set in \a mask, and \a xid must point to valid memory.
564 * Possible flags are \c VC_IATTR_ADMIN, \c VC_IATTR_WATCH , \c VC_IATTR_HIDE,
565 * \c VC_IATTR_BARRIER, \c VC_IATTR_IUNLINK and \c VC_IATTR_IMMUTABLE.
567 * \param filename The name of the file whose attributes shall be determined.
569 * \param xid When non-zero and the VC_IATTR_XID bit is set in \a mask,
570 * the assigned context of \a filename will be stored there.
571 * \param flags When non-zero, a bitmask of current attributes will be
572 * stored there. These attributes must be requested explicitly
573 * by setting the appropriate bit in \a mask
574 * \param mask Points to a bitmask which tells which attributes shall be
575 * determined. On return, it will masquerade the attributes
576 * which were determined.
578 * \pre mask!=0 && !((*mask&VC_IATTR_XID) && xid==0) && !((*mask&~VC_IATTR_XID) && flags==0) */
579 int vc_get_iattr(char const *filename, xid_t * /*@null@*/ xid,
580 uint_least32_t * /*@null@*/ flags,
581 uint_least32_t * /*@null@*/ mask) VC_ATTR_NONNULL((1));
588 /** \brief Returns the context of the given process.
591 * \param pid the process-id whose xid shall be determined;
592 * pid==0 means the current process.
593 * \returns the xid of process \c pid or -1 on errors
595 xid_t vc_get_task_xid(pid_t pid);
596 int vc_get_vx_info(xid_t xid, struct vc_vx_info *info) VC_ATTR_NONNULL((2));
599 typedef enum { vcVHI_CONTEXT, vcVHI_SYSNAME, vcVHI_NODENAME,
600 vcVHI_RELEASE, vcVHI_VERSION, vcVHI_MACHINE,
601 vcVHI_DOMAINNAME } vc_uts_type;
603 int vc_set_vhi_name(xid_t xid, vc_uts_type type,
604 char const *val, size_t len) VC_ATTR_NONNULL((3));
605 int vc_get_vhi_name(xid_t xid, vc_uts_type type,
606 char *val, size_t len) VC_ATTR_NONNULL((3));
608 /** Returns true iff \a xid is a dynamic xid */
609 bool vc_is_dynamic_xid(xid_t xid);
611 int vc_enter_namespace(xid_t xid);
612 int vc_set_namespace();
613 int vc_cleanup_namespace();
616 /** \brief Flags of process-contexts
618 struct vc_ctx_flags {
619 /** \brief Mask of set context flags */
620 uint_least64_t flagword;
621 /** \brief Mask of set and unset context flags when used by set
622 * operations, or modifiable flags when used by get
627 /** \brief Capabilities of process-contexts */
629 /** \brief Mask of set common system capabilities */
630 uint_least64_t bcaps;
631 /** \brief Mask of set and unset common system capabilities when used by
632 * set operations, or the modifiable capabilities when used by
634 uint_least64_t bmask;
635 /** \brief Mask of set process context capabilities */
636 uint_least64_t ccaps;
637 /** \brief Mask of set and unset process context capabilities when used
638 * by set operations, or the modifiable capabilities when used
639 * by get operations */
640 uint_least64_t cmask;
643 /** \brief Information about parsing errors
646 struct vc_err_listparser {
647 char const *ptr; ///< Pointer to the first character of an erroneous string
648 size_t len; ///< Length of the erroneous string
651 int vc_get_cflags(xid_t xid, struct vc_ctx_flags *) VC_ATTR_NONNULL((2));
652 int vc_set_cflags(xid_t xid, struct vc_ctx_flags const *) VC_ATTR_NONNULL((2));
654 int vc_get_ccaps(xid_t xid, struct vc_ctx_caps *);
655 int vc_set_ccaps(xid_t xid, struct vc_ctx_caps const *);
657 /** \brief Converts a single string into bcapability
660 * \param str The string to be parsed;
661 * both "CAP_xxx" and "xxx" will be accepted
662 * \param len The length of the string, or \c 0 for automatic detection
664 * \returns 0 on error; a bitmask on success
667 uint_least64_t vc_text2bcap(char const *str, size_t len);
669 /** \brief Converts the lowest bit of a bcapability or the entire value
670 * (when possible) to a textual representation
673 * \param val The string to be converted; on success, the detected bit(s)
674 * will be unset, in errorcase only the lowest set bit
676 * \returns A textual representation of \a val resp. of its lowest set bit;
677 * or \c NULL in errorcase.
679 * \post \a *val<sub>old</sub> \c != 0 \c <-->
680 * \a *val<sub>old</sub> > \a *val<sub>new</sub>
681 * \post \a *val<sub>old</sub> \c == 0 \c ---> \a result == 0
683 char const * vc_lobcap2text(uint_least64_t *val) VC_ATTR_NONNULL((1));
685 /** \brief Converts a string into a bcapability-bitmask
688 * Syntax of \a str: \verbinclude list2xxx.syntax
690 * When the \c `~' prefix is used, the bits will be unset and a `~' after
691 * another `~' will cancel both ones. The \c `^' prefix specifies a
692 * bitnumber instead of a bitmask.
694 * "literal name" is everything which will be accepted by the
695 * vc_text2bcap() function. The special values for \c NAME will be
696 * recognized case insensitively
698 * \param str The string to be parsed
699 * \param len The length of the string, or \c 0 for automatic detection
700 * \param err Pointer to a structure for error-information, or \c NULL.
701 * \param cap Pointer to a vc_ctx_caps structure holding the results;
702 * only the \a bcaps and \a bmask fields will be changed and
703 * already set values will not be honored. When an error
704 * occured, \a cap will have the value of all processed valid
707 * \returns 0 on success, -1 on error. In error case, \a err will hold
708 * position and length of the first not understood BCAP part
709 * \pre \a str != 0 && \a cap != 0;
710 * \a cap->bcaps and \a cap->bmask must be initialized
712 int vc_list2bcap(char const *str, size_t len,
713 struct vc_err_listparser *err,
714 struct vc_ctx_caps *cap) VC_ATTR_NONNULL((1,4));
716 uint_least64_t vc_text2ccap(char const *, size_t len);
717 char const * vc_loccap2text(uint_least64_t *);
718 int vc_list2ccap(char const *, size_t len,
719 struct vc_err_listparser *err,
720 struct vc_ctx_caps *);
722 int vc_list2cflag(char const *, size_t len,
723 struct vc_err_listparser *err,
724 struct vc_ctx_flags *flags);
725 uint_least64_t vc_text2cflag(char const *, size_t len);
726 char const * vc_locflag2text(uint_least64_t *);
728 uint_least32_t vc_list2cflag_compat(char const *, size_t len,
729 struct vc_err_listparser *err);
730 uint_least32_t vc_text2cflag_compat(char const *, size_t len);
731 char const * vc_hicflag2text_compat(uint_least32_t);
733 int vc_text2cap(char const *);
734 char const * vc_cap2text(unsigned int);
737 int vc_list2nflag(char const *, size_t len,
738 struct vc_err_listparser *err,
739 struct vc_net_flags *flags);
740 uint_least64_t vc_text2nflag(char const *, size_t len);
741 char const * vc_lonflag2text(uint_least64_t *);
743 uint_least64_t vc_text2ncap(char const *, size_t len);
744 char const * vc_loncap2text(uint_least64_t *);
745 int vc_list2ncap(char const *, size_t len,
746 struct vc_err_listparser *err,
747 struct vc_net_caps *);
749 uint_least64_t vc_get_insecurebcaps() VC_ATTR_CONST;
750 inline static uint_least64_t vc_get_insecureccaps() {
751 return ~(VC_VXC_SET_UTSNAME|VC_VXC_RAW_ICMP);
754 inline static int vc_setfilecontext(char const *filename, xid_t xid) {
755 return vc_set_iattr(filename, xid, 0, VC_IATTR_XID);
759 uint_least32_t vc_text2personalityflag(char const *str,
760 size_t len) VC_ATTR_NONNULL((1));
762 char const * vc_lopersonality2text(uint_least32_t *) VC_ATTR_NONNULL((1));
764 int vc_list2personalityflag(char const /*@in@*/ *,
766 uint_least32_t /*@out@*/ *personality,
767 struct vc_err_listparser /*@out@*/ *err) VC_ATTR_NONNULL((1,3));
769 uint_least32_t vc_str2personalitytype(char const /*@in@*/*,
770 size_t len) VC_ATTR_NONNULL((1));
772 /** \brief Returns the context of \c filename
775 * This function calls vc_get_iattr() with appropriate arguments to
776 * determine the context of \c filename. In error-case or when no context
777 * is assigned, \c VC_NOCTX will be returned. To differ between both cases,
778 * \c errno must be examined.
780 * \b WARNING: this function can modify \c errno although no error happened.
782 * \param filename The file to check
783 * \returns The assigned context, or VC_NOCTX when an error occured or no
784 * such assignment exists. \c errno will be 0 in the latter case */
785 xid_t vc_getfilecontext(char const *filename) VC_ATTR_NONNULL((1));
788 struct vc_set_sched {
789 uint_least32_t set_mask;
790 int_least32_t fill_rate;
791 int_least32_t interval;
792 int_least32_t fill_rate2;
793 int_least32_t interval2;
794 int_least32_t tokens;
795 int_least32_t tokens_min;
796 int_least32_t tokens_max;
797 int_least32_t priority_bias;
798 int_least32_t cpu_id;
799 int_least32_t bucket_id;
802 int vc_set_sched(xid_t xid, struct vc_set_sched const *);
805 struct vc_ctx_dlimit {
806 uint_least32_t space_used;
807 uint_least32_t space_total;
808 uint_least32_t inodes_used;
809 uint_least32_t inodes_total;
810 uint_least32_t reserved;
814 /** Add a disk limit to a file system. */
815 int vc_add_dlimit(char const *filename, xid_t xid,
816 uint_least32_t flags) VC_ATTR_NONNULL((1));
817 /** Remove a disk limit from a file system. */
818 int vc_rem_dlimit(char const *filename, xid_t xid,
819 uint_least32_t flags) VC_ATTR_NONNULL((1));
821 /** Set a disk limit. */
822 int vc_set_dlimit(char const *filename, xid_t xid,
823 uint_least32_t flags,
824 struct vc_ctx_dlimit const *limits) VC_ATTR_NONNULL((1,4));
825 /** Get a disk limit. */
826 int vc_get_dlimit(char const *filename, xid_t xid,
827 uint_least32_t flags,
828 struct vc_ctx_dlimit *limits) VC_ATTR_NONNULL((1));
830 /** \brief Waits for the end of a context
833 int vc_wait_exit(xid_t xid);
835 typedef enum { vcFEATURE_VKILL, vcFEATURE_IATTR, vcFEATURE_RLIMIT,
836 vcFEATURE_COMPAT, vcFEATURE_MIGRATE, vcFEATURE_NAMESPACE,
837 vcFEATURE_SCHED, vcFEATURE_VINFO, vcFEATURE_VHI,
838 vcFEATURE_VSHELPER0, vcFEATURE_VSHELPER, vcFEATURE_VWAIT,
842 bool vc_isSupported(vcFeatureSet) VC_ATTR_CONST;
843 bool vc_isSupportedString(char const *);
846 typedef enum { vcTYPE_INVALID, vcTYPE_MAIN, vcTYPE_WATCH,
847 vcTYPE_STATIC, vcTYPE_DYNAMIC }
850 vcXidType vc_getXIDType(xid_t xid) VC_ATTR_CONST;
852 /* The management part */
854 #define VC_LIMIT_VSERVER_NAME_LEN 1024
856 typedef enum { vcCFG_NONE, vcCFG_AUTO,
859 vcCFG_RECENT_FULL } vcCfgStyle;
862 /** Maps an xid given at '--xid' options to an xid_t */
863 xid_t vc_xidopt2xid(char const *, bool honor_static, char const **err_info);
864 /** Maps a nid given at '--nid' options to a nid_t */
865 nid_t vc_nidopt2nid(char const *, bool honor_static, char const **err_info);
867 vcCfgStyle vc_getVserverCfgStyle(char const *id);
869 /** Resolves the name of the vserver. The result will be allocated and must
870 be freed by the caller. */
871 char * vc_getVserverName(char const *id, vcCfgStyle style);
873 /** Returns the path of the vserver configuration directory. When the given
874 * vserver does not exist, or when it does not have such a directory, NULL
875 * will be returned. Else, the result will be allocated and must be freed
877 char * vc_getVserverCfgDir(char const *id, vcCfgStyle style);
879 /** Returns the path of the configuration directory for the given
880 * application. The result will be allocated and must be freed by the
882 char * vc_getVserverAppDir(char const *id, vcCfgStyle style, char const *app);
884 /** Returns the path to the vserver root-directory. The result will be
885 * allocated and must be freed by the caller. */
886 char * vc_getVserverVdir(char const *id, vcCfgStyle style, bool physical);
888 /** Returns the ctx of the given vserver. When vserver is not running and
889 * 'honor_static' is false, VC_NOCTX will be returned. Else, when
890 * 'honor_static' is true and a static assignment exists, those value will
891 * be returned. Else, the result will be VC_NOCTX.
893 * When 'is_running' is not null, the status of the vserver will be
894 * assigned to this variable. */
895 xid_t vc_getVserverCtx(char const *id, vcCfgStyle style,
896 bool honor_static, bool /*@null@*/ *is_running);
898 /** Resolves the cfg-path of the vserver owning the given ctx. 'revdir' will
899 be used as the directory holding the mapping-links; when NULL, the
900 default value will be assumed. The result will be allocated and must be
901 freed by the caller. */
902 char * vc_getVserverByCtx(xid_t ctx, /*@null@*/vcCfgStyle *style,
903 /*@null@*/char const *revdir);
905 int vc_compareVserverById(char const *lhs, vcCfgStyle lhs_style,
906 char const *rhs, vcCfgStyle rhs_style);
908 #define vcSKEL_INTERFACES 1u
909 #define vcSKEL_PKGMGMT 2u
910 #define vcSKEL_FILESYSTEM 4u
912 /** Create a basic configuration skeleton for a vserver plus toplevel
913 * directories for pkgmanagemt and filesystem (when requested). */
914 int vc_createSkeleton(char const *id, vcCfgStyle style, int flags);
922 #undef VC_ATTR_ALWAYSINLINE
923 #undef VC_ATTR_NORETURN
924 #undef VC_ATTR_UNUSED
925 #undef VC_ATTR_NONNULL