Blame view
ipc/shm.c
26.5 KB
1da177e4c
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
/* * linux/ipc/shm.c * Copyright (C) 1992, 1993 Krishna Balasubramanian * Many improvements/fixes by Bruno Haible. * Replaced `struct shm_desc' by `struct vm_area_struct', July 1994. * Fixed the shm swap deallocation (shm_unuse()), August 1998 Andrea Arcangeli. * * /proc/sysvipc/shm support (c) 1999 Dragos Acostachioaie <dragos@iname.com> * BIGMEM support, Andrea Arcangeli <andrea@suse.de> * SMP thread shm, Jean-Luc Boyard <jean-luc.boyard@siemens.fr> * HIGHMEM support, Ingo Molnar <mingo@redhat.com> * Make shmmax, shmall, shmmni sysctl'able, Christoph Rohland <cr@sap.com> * Shared /dev/zero support, Kanoj Sarcar <kanoj@sgi.com> * Move the mm functionality over to mm/shmem.c, Christoph Rohland <cr@sap.com> * |
073115d6b
|
16 17 |
* support for audit of ipc object properties and permission changes * Dustin Kirkland <dustin.kirkland@us.ibm.com> |
4e9823111
|
18 19 20 21 |
* * namespaces support * OpenVZ, SWsoft Inc. * Pavel Emelianov <xemul@openvz.org> |
1da177e4c
|
22 |
*/ |
1da177e4c
|
23 24 25 26 27 28 29 |
#include <linux/slab.h> #include <linux/mm.h> #include <linux/hugetlb.h> #include <linux/shm.h> #include <linux/init.h> #include <linux/file.h> #include <linux/mman.h> |
1da177e4c
|
30 31 32 33 |
#include <linux/shmem_fs.h> #include <linux/security.h> #include <linux/syscalls.h> #include <linux/audit.h> |
c59ede7b7
|
34 |
#include <linux/capability.h> |
7d87e14c2
|
35 |
#include <linux/ptrace.h> |
19b4946ca
|
36 |
#include <linux/seq_file.h> |
3e148c799
|
37 |
#include <linux/rwsem.h> |
4e9823111
|
38 |
#include <linux/nsproxy.h> |
bc56bba8f
|
39 |
#include <linux/mount.h> |
ae5e1b22f
|
40 |
#include <linux/ipc_namespace.h> |
7d87e14c2
|
41 |
|
1da177e4c
|
42 43 44 |
#include <asm/uaccess.h> #include "util.h" |
bc56bba8f
|
45 46 47 48 49 50 51 52 |
struct shm_file_data { int id; struct ipc_namespace *ns; struct file *file; const struct vm_operations_struct *vm_ops; }; #define shm_file_data(file) (*((struct shm_file_data **)&(file)->private_data)) |
9a32144e9
|
53 |
static const struct file_operations shm_file_operations; |
f0f37e2f7
|
54 |
static const struct vm_operations_struct shm_vm_ops; |
1da177e4c
|
55 |
|
ed2ddbf88
|
56 |
#define shm_ids(ns) ((ns)->ids[IPC_SHM_IDS]) |
1da177e4c
|
57 |
|
4e9823111
|
58 59 |
#define shm_unlock(shp) \ ipc_unlock(&(shp)->shm_perm) |
1da177e4c
|
60 |
|
7748dbfaa
|
61 |
static int newseg(struct ipc_namespace *, struct ipc_params *); |
bc56bba8f
|
62 63 |
static void shm_open(struct vm_area_struct *vma); static void shm_close(struct vm_area_struct *vma); |
4e9823111
|
64 |
static void shm_destroy (struct ipc_namespace *ns, struct shmid_kernel *shp); |
1da177e4c
|
65 |
#ifdef CONFIG_PROC_FS |
19b4946ca
|
66 |
static int sysvipc_shm_proc_show(struct seq_file *s, void *it); |
1da177e4c
|
67 |
#endif |
ed2ddbf88
|
68 |
void shm_init_ns(struct ipc_namespace *ns) |
4e9823111
|
69 |
{ |
4e9823111
|
70 71 72 73 |
ns->shm_ctlmax = SHMMAX; ns->shm_ctlall = SHMALL; ns->shm_ctlmni = SHMMNI; ns->shm_tot = 0; |
e8148f758
|
74 |
ipc_init_ids(&shm_ids(ns)); |
4e9823111
|
75 |
} |
f4566f048
|
76 |
/* |
3e148c799
|
77 78 |
* Called with shm_ids.rw_mutex (writer) and the shp structure locked. * Only shm_ids.rw_mutex remains locked on exit. |
f4566f048
|
79 |
*/ |
01b8b07a5
|
80 |
static void do_shm_rmid(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp) |
4e9823111
|
81 |
{ |
01b8b07a5
|
82 83 |
struct shmid_kernel *shp; shp = container_of(ipcp, struct shmid_kernel, shm_perm); |
4e9823111
|
84 85 86 87 88 89 90 91 |
if (shp->shm_nattch){ shp->shm_perm.mode |= SHM_DEST; /* Do not find it any more */ shp->shm_perm.key = IPC_PRIVATE; shm_unlock(shp); } else shm_destroy(ns, shp); } |
ae5e1b22f
|
92 |
#ifdef CONFIG_IPC_NS |
4e9823111
|
93 94 |
void shm_exit_ns(struct ipc_namespace *ns) { |
01b8b07a5
|
95 |
free_ipcs(ns, &shm_ids(ns), do_shm_rmid); |
7d6feeb28
|
96 |
idr_destroy(&ns->ids[IPC_SHM_IDS].ipcs_idr); |
4e9823111
|
97 |
} |
ae5e1b22f
|
98 |
#endif |
1da177e4c
|
99 100 101 |
void __init shm_init (void) { |
ed2ddbf88
|
102 |
shm_init_ns(&init_ipc_ns); |
19b4946ca
|
103 |
ipc_init_proc_interface("sysvipc/shm", |
b79521807
|
104 105 106 107 108 109 110 |
#if BITS_PER_LONG <= 32 " key shmid perms size cpid lpid nattch uid gid cuid cgid atime dtime ctime rss swap ", #else " key shmid perms size cpid lpid nattch uid gid cuid cgid atime dtime ctime rss swap ", #endif |
4e9823111
|
111 |
IPC_SHM_IDS, sysvipc_shm_proc_show); |
1da177e4c
|
112 |
} |
3e148c799
|
113 |
/* |
3e148c799
|
114 |
* shm_lock_(check_) routines are called in the paths where the rw_mutex |
00c2bf85d
|
115 |
* is not necessarily held. |
3e148c799
|
116 |
*/ |
023a53557
|
117 |
static inline struct shmid_kernel *shm_lock(struct ipc_namespace *ns, int id) |
1da177e4c
|
118 |
{ |
03f02c765
|
119 |
struct kern_ipc_perm *ipcp = ipc_lock(&shm_ids(ns), id); |
b1ed88b47
|
120 121 |
if (IS_ERR(ipcp)) return (struct shmid_kernel *)ipcp; |
03f02c765
|
122 |
return container_of(ipcp, struct shmid_kernel, shm_perm); |
023a53557
|
123 124 125 126 127 |
} static inline struct shmid_kernel *shm_lock_check(struct ipc_namespace *ns, int id) { |
03f02c765
|
128 |
struct kern_ipc_perm *ipcp = ipc_lock_check(&shm_ids(ns), id); |
b1ed88b47
|
129 130 |
if (IS_ERR(ipcp)) return (struct shmid_kernel *)ipcp; |
03f02c765
|
131 |
return container_of(ipcp, struct shmid_kernel, shm_perm); |
1da177e4c
|
132 |
} |
7ca7e564e
|
133 |
static inline void shm_rmid(struct ipc_namespace *ns, struct shmid_kernel *s) |
1da177e4c
|
134 |
{ |
7ca7e564e
|
135 |
ipc_rmid(&shm_ids(ns), &s->shm_perm); |
1da177e4c
|
136 |
} |
1da177e4c
|
137 |
|
bc56bba8f
|
138 139 |
/* This is called by fork, once for every shm attach. */ static void shm_open(struct vm_area_struct *vma) |
4e9823111
|
140 |
{ |
bc56bba8f
|
141 142 |
struct file *file = vma->vm_file; struct shm_file_data *sfd = shm_file_data(file); |
1da177e4c
|
143 |
struct shmid_kernel *shp; |
bc56bba8f
|
144 |
shp = shm_lock(sfd->ns, sfd->id); |
023a53557
|
145 |
BUG_ON(IS_ERR(shp)); |
1da177e4c
|
146 |
shp->shm_atim = get_seconds(); |
b488893a3
|
147 |
shp->shm_lprid = task_tgid_vnr(current); |
1da177e4c
|
148 149 150 |
shp->shm_nattch++; shm_unlock(shp); } |
1da177e4c
|
151 152 153 |
/* * shm_destroy - free the struct shmid_kernel * |
f4566f048
|
154 |
* @ns: namespace |
1da177e4c
|
155 156 |
* @shp: struct to free * |
3e148c799
|
157 |
* It has to be called with shp and shm_ids.rw_mutex (writer) locked, |
1da177e4c
|
158 159 |
* but returns with shp unlocked and freed. */ |
4e9823111
|
160 |
static void shm_destroy(struct ipc_namespace *ns, struct shmid_kernel *shp) |
1da177e4c
|
161 |
{ |
4e9823111
|
162 |
ns->shm_tot -= (shp->shm_segsz + PAGE_SIZE - 1) >> PAGE_SHIFT; |
7ca7e564e
|
163 |
shm_rmid(ns, shp); |
1da177e4c
|
164 165 166 |
shm_unlock(shp); if (!is_file_hugepages(shp->shm_file)) shmem_lock(shp->shm_file, 0, shp->mlock_user); |
353d5c30c
|
167 |
else if (shp->mlock_user) |
6d63079ad
|
168 |
user_shm_unlock(shp->shm_file->f_path.dentry->d_inode->i_size, |
1da177e4c
|
169 170 171 172 173 174 175 |
shp->mlock_user); fput (shp->shm_file); security_shm_free(shp); ipc_rcu_putref(shp); } /* |
bc56bba8f
|
176 |
* remove the attach descriptor vma. |
1da177e4c
|
177 178 179 180 |
* free memory for segment if it is marked destroyed. * The descriptor has already been removed from the current->mm->mmap list * and will later be kfree()d. */ |
bc56bba8f
|
181 |
static void shm_close(struct vm_area_struct *vma) |
1da177e4c
|
182 |
{ |
bc56bba8f
|
183 184 |
struct file * file = vma->vm_file; struct shm_file_data *sfd = shm_file_data(file); |
1da177e4c
|
185 |
struct shmid_kernel *shp; |
bc56bba8f
|
186 |
struct ipc_namespace *ns = sfd->ns; |
4e9823111
|
187 |
|
3e148c799
|
188 |
down_write(&shm_ids(ns).rw_mutex); |
1da177e4c
|
189 |
/* remove from the list of attaches of the shm segment */ |
00c2bf85d
|
190 |
shp = shm_lock(ns, sfd->id); |
023a53557
|
191 |
BUG_ON(IS_ERR(shp)); |
b488893a3
|
192 |
shp->shm_lprid = task_tgid_vnr(current); |
1da177e4c
|
193 194 195 |
shp->shm_dtim = get_seconds(); shp->shm_nattch--; if(shp->shm_nattch == 0 && |
b33291c0b
|
196 |
shp->shm_perm.mode & SHM_DEST) |
4e9823111
|
197 |
shm_destroy(ns, shp); |
1da177e4c
|
198 199 |
else shm_unlock(shp); |
3e148c799
|
200 |
up_write(&shm_ids(ns).rw_mutex); |
1da177e4c
|
201 |
} |
d0217ac04
|
202 |
static int shm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
bc56bba8f
|
203 204 205 |
{ struct file *file = vma->vm_file; struct shm_file_data *sfd = shm_file_data(file); |
d0217ac04
|
206 |
return sfd->vm_ops->fault(vma, vmf); |
bc56bba8f
|
207 208 209 |
} #ifdef CONFIG_NUMA |
d823e3e75
|
210 |
static int shm_set_policy(struct vm_area_struct *vma, struct mempolicy *new) |
bc56bba8f
|
211 212 213 214 215 216 217 218 |
{ struct file *file = vma->vm_file; struct shm_file_data *sfd = shm_file_data(file); int err = 0; if (sfd->vm_ops->set_policy) err = sfd->vm_ops->set_policy(vma, new); return err; } |
d823e3e75
|
219 220 |
static struct mempolicy *shm_get_policy(struct vm_area_struct *vma, unsigned long addr) |
bc56bba8f
|
221 222 223 224 225 226 227 |
{ struct file *file = vma->vm_file; struct shm_file_data *sfd = shm_file_data(file); struct mempolicy *pol = NULL; if (sfd->vm_ops->get_policy) pol = sfd->vm_ops->get_policy(vma, addr); |
52cd3b074
|
228 |
else if (vma->vm_policy) |
bc56bba8f
|
229 |
pol = vma->vm_policy; |
52cd3b074
|
230 |
|
bc56bba8f
|
231 232 233 |
return pol; } #endif |
1da177e4c
|
234 235 |
static int shm_mmap(struct file * file, struct vm_area_struct * vma) { |
bc56bba8f
|
236 |
struct shm_file_data *sfd = shm_file_data(file); |
b0e15190e
|
237 |
int ret; |
bc56bba8f
|
238 239 240 241 |
ret = sfd->file->f_op->mmap(sfd->file, vma); if (ret != 0) return ret; sfd->vm_ops = vma->vm_ops; |
2e92a3bae
|
242 |
#ifdef CONFIG_MMU |
54cb8821d
|
243 |
BUG_ON(!sfd->vm_ops->fault); |
2e92a3bae
|
244 |
#endif |
bc56bba8f
|
245 246 |
vma->vm_ops = &shm_vm_ops; shm_open(vma); |
b0e15190e
|
247 248 |
return ret; |
1da177e4c
|
249 |
} |
4e9823111
|
250 251 |
static int shm_release(struct inode *ino, struct file *file) { |
bc56bba8f
|
252 |
struct shm_file_data *sfd = shm_file_data(file); |
4e9823111
|
253 |
|
bc56bba8f
|
254 255 256 |
put_ipc_ns(sfd->ns); shm_file_data(file) = NULL; kfree(sfd); |
4e9823111
|
257 258 |
return 0; } |
7ea808591
|
259 |
static int shm_fsync(struct file *file, int datasync) |
516dffdcd
|
260 |
{ |
516dffdcd
|
261 |
struct shm_file_data *sfd = shm_file_data(file); |
516dffdcd
|
262 |
|
7ea808591
|
263 264 265 |
if (!sfd->file->f_op->fsync) return -EINVAL; return sfd->file->f_op->fsync(sfd->file, datasync); |
516dffdcd
|
266 |
} |
bc56bba8f
|
267 268 269 270 271 |
static unsigned long shm_get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) { struct shm_file_data *sfd = shm_file_data(file); |
c4caa7781
|
272 273 |
return sfd->file->f_op->get_unmapped_area(sfd->file, addr, len, pgoff, flags); |
bc56bba8f
|
274 |
} |
bc56bba8f
|
275 |
|
9a32144e9
|
276 |
static const struct file_operations shm_file_operations = { |
4e9823111
|
277 |
.mmap = shm_mmap, |
516dffdcd
|
278 |
.fsync = shm_fsync, |
4e9823111
|
279 |
.release = shm_release, |
ed5e5894b
|
280 281 282 |
#ifndef CONFIG_MMU .get_unmapped_area = shm_get_unmapped_area, #endif |
6038f373a
|
283 |
.llseek = noop_llseek, |
c4caa7781
|
284 285 286 287 288 289 |
}; static const struct file_operations shm_file_operations_huge = { .mmap = shm_mmap, .fsync = shm_fsync, .release = shm_release, |
bc56bba8f
|
290 |
.get_unmapped_area = shm_get_unmapped_area, |
6038f373a
|
291 |
.llseek = noop_llseek, |
1da177e4c
|
292 |
}; |
c4caa7781
|
293 294 295 296 |
int is_file_shm_hugepages(struct file *file) { return file->f_op == &shm_file_operations_huge; } |
f0f37e2f7
|
297 |
static const struct vm_operations_struct shm_vm_ops = { |
1da177e4c
|
298 299 |
.open = shm_open, /* callback for a new vm-area open */ .close = shm_close, /* callback for when the vm-area is released */ |
54cb8821d
|
300 |
.fault = shm_fault, |
bc56bba8f
|
301 302 303 |
#if defined(CONFIG_NUMA) .set_policy = shm_set_policy, .get_policy = shm_get_policy, |
1da177e4c
|
304 305 |
#endif }; |
f4566f048
|
306 307 308 309 310 |
/** * newseg - Create a new shared memory segment * @ns: namespace * @params: ptr to the structure that contains key, size and shmflg * |
3e148c799
|
311 |
* Called with shm_ids.rw_mutex held as a writer. |
f4566f048
|
312 |
*/ |
7748dbfaa
|
313 |
static int newseg(struct ipc_namespace *ns, struct ipc_params *params) |
1da177e4c
|
314 |
{ |
7748dbfaa
|
315 316 317 |
key_t key = params->key; int shmflg = params->flg; size_t size = params->u.size; |
1da177e4c
|
318 319 320 321 322 323 |
int error; struct shmid_kernel *shp; int numpages = (size + PAGE_SIZE -1) >> PAGE_SHIFT; struct file * file; char name[13]; int id; |
ca16d140a
|
324 |
vm_flags_t acctflag = 0; |
1da177e4c
|
325 |
|
4e9823111
|
326 |
if (size < SHMMIN || size > ns->shm_ctlmax) |
1da177e4c
|
327 |
return -EINVAL; |
f66d45e99
|
328 |
if (ns->shm_tot + numpages > ns->shm_ctlall) |
1da177e4c
|
329 330 331 332 333 334 335 |
return -ENOSPC; shp = ipc_rcu_alloc(sizeof(*shp)); if (!shp) return -ENOMEM; shp->shm_perm.key = key; |
b33291c0b
|
336 |
shp->shm_perm.mode = (shmflg & S_IRWXUGO); |
1da177e4c
|
337 338 339 340 341 342 343 344 |
shp->mlock_user = NULL; shp->shm_perm.security = NULL; error = security_shm_alloc(shp); if (error) { ipc_rcu_putref(shp); return error; } |
9d66586f7
|
345 |
sprintf (name, "SYSV%08x", key); |
1da177e4c
|
346 |
if (shmflg & SHM_HUGETLB) { |
5a6fe1259
|
347 348 349 |
/* hugetlb_file_setup applies strict accounting */ if (shmflg & SHM_NORESERVE) acctflag = VM_NORESERVE; |
353d5c30c
|
350 |
file = hugetlb_file_setup(name, size, acctflag, |
6bfde05bf
|
351 |
&shp->mlock_user, HUGETLB_SHMFS_INODE); |
1da177e4c
|
352 |
} else { |
bf8f972d3
|
353 354 355 356 357 358 |
/* * Do not allow no accounting for OVERCOMMIT_NEVER, even * if it's asked for. */ if ((shmflg & SHM_NORESERVE) && sysctl_overcommit_memory != OVERCOMMIT_NEVER) |
fc8744adc
|
359 |
acctflag = VM_NORESERVE; |
bf8f972d3
|
360 |
file = shmem_file_setup(name, size, acctflag); |
1da177e4c
|
361 362 363 364 |
} error = PTR_ERR(file); if (IS_ERR(file)) goto no_file; |
48dea404e
|
365 |
id = ipc_addid(&shm_ids(ns), &shp->shm_perm, ns->shm_ctlmni); |
283bb7fad
|
366 367 |
if (id < 0) { error = id; |
1da177e4c
|
368 |
goto no_id; |
283bb7fad
|
369 |
} |
1da177e4c
|
370 |
|
b488893a3
|
371 |
shp->shm_cprid = task_tgid_vnr(current); |
1da177e4c
|
372 373 374 375 376 |
shp->shm_lprid = 0; shp->shm_atim = shp->shm_dtim = 0; shp->shm_ctim = get_seconds(); shp->shm_segsz = size; shp->shm_nattch = 0; |
1da177e4c
|
377 |
shp->shm_file = file; |
30475cc12
|
378 379 380 381 |
/* * shmid gets reported as "inode#" in /proc/pid/maps. * proc-ps tools use this. Changing this will break them. */ |
7ca7e564e
|
382 |
file->f_dentry->d_inode->i_ino = shp->shm_perm.id; |
551110a94
|
383 |
|
4e9823111
|
384 |
ns->shm_tot += numpages; |
7ca7e564e
|
385 |
error = shp->shm_perm.id; |
1da177e4c
|
386 |
shm_unlock(shp); |
7ca7e564e
|
387 |
return error; |
1da177e4c
|
388 389 |
no_id: |
2195d2818
|
390 |
if (is_file_hugepages(file) && shp->mlock_user) |
353d5c30c
|
391 |
user_shm_unlock(size, shp->mlock_user); |
1da177e4c
|
392 393 394 395 396 397 |
fput(file); no_file: security_shm_free(shp); ipc_rcu_putref(shp); return error; } |
f4566f048
|
398 |
/* |
3e148c799
|
399 |
* Called with shm_ids.rw_mutex and ipcp locked. |
f4566f048
|
400 |
*/ |
03f02c765
|
401 |
static inline int shm_security(struct kern_ipc_perm *ipcp, int shmflg) |
7748dbfaa
|
402 |
{ |
03f02c765
|
403 404 405 406 |
struct shmid_kernel *shp; shp = container_of(ipcp, struct shmid_kernel, shm_perm); return security_shm_associate(shp, shmflg); |
7748dbfaa
|
407 |
} |
f4566f048
|
408 |
/* |
3e148c799
|
409 |
* Called with shm_ids.rw_mutex and ipcp locked. |
f4566f048
|
410 |
*/ |
03f02c765
|
411 412 |
static inline int shm_more_checks(struct kern_ipc_perm *ipcp, struct ipc_params *params) |
7748dbfaa
|
413 |
{ |
03f02c765
|
414 415 416 417 |
struct shmid_kernel *shp; shp = container_of(ipcp, struct shmid_kernel, shm_perm); if (shp->shm_segsz < params->u.size) |
7748dbfaa
|
418 419 420 421 |
return -EINVAL; return 0; } |
d5460c997
|
422 |
SYSCALL_DEFINE3(shmget, key_t, key, size_t, size, int, shmflg) |
1da177e4c
|
423 |
{ |
4e9823111
|
424 |
struct ipc_namespace *ns; |
7748dbfaa
|
425 426 |
struct ipc_ops shm_ops; struct ipc_params shm_params; |
4e9823111
|
427 428 |
ns = current->nsproxy->ipc_ns; |
1da177e4c
|
429 |
|
7748dbfaa
|
430 431 432 |
shm_ops.getnew = newseg; shm_ops.associate = shm_security; shm_ops.more_checks = shm_more_checks; |
7ca7e564e
|
433 |
|
7748dbfaa
|
434 435 436 |
shm_params.key = key; shm_params.flg = shmflg; shm_params.u.size = size; |
1da177e4c
|
437 |
|
7748dbfaa
|
438 |
return ipcget(ns, &shm_ids(ns), &shm_ops, &shm_params); |
1da177e4c
|
439 440 441 442 443 444 445 446 447 448 |
} static inline unsigned long copy_shmid_to_user(void __user *buf, struct shmid64_ds *in, int version) { switch(version) { case IPC_64: return copy_to_user(buf, in, sizeof(*in)); case IPC_OLD: { struct shmid_ds out; |
3af54c9bd
|
449 |
memset(&out, 0, sizeof(out)); |
1da177e4c
|
450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 |
ipc64_perm_to_ipc_perm(&in->shm_perm, &out.shm_perm); out.shm_segsz = in->shm_segsz; out.shm_atime = in->shm_atime; out.shm_dtime = in->shm_dtime; out.shm_ctime = in->shm_ctime; out.shm_cpid = in->shm_cpid; out.shm_lpid = in->shm_lpid; out.shm_nattch = in->shm_nattch; return copy_to_user(buf, &out, sizeof(out)); } default: return -EINVAL; } } |
016d7132f
|
465 466 |
static inline unsigned long copy_shmid_from_user(struct shmid64_ds *out, void __user *buf, int version) |
1da177e4c
|
467 468 469 |
{ switch(version) { case IPC_64: |
016d7132f
|
470 |
if (copy_from_user(out, buf, sizeof(*out))) |
1da177e4c
|
471 |
return -EFAULT; |
1da177e4c
|
472 |
return 0; |
1da177e4c
|
473 474 475 476 477 478 |
case IPC_OLD: { struct shmid_ds tbuf_old; if (copy_from_user(&tbuf_old, buf, sizeof(tbuf_old))) return -EFAULT; |
016d7132f
|
479 480 481 |
out->shm_perm.uid = tbuf_old.shm_perm.uid; out->shm_perm.gid = tbuf_old.shm_perm.gid; out->shm_perm.mode = tbuf_old.shm_perm.mode; |
1da177e4c
|
482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 |
return 0; } default: return -EINVAL; } } static inline unsigned long copy_shminfo_to_user(void __user *buf, struct shminfo64 *in, int version) { switch(version) { case IPC_64: return copy_to_user(buf, in, sizeof(*in)); case IPC_OLD: { struct shminfo out; if(in->shmmax > INT_MAX) out.shmmax = INT_MAX; else out.shmmax = (int)in->shmmax; out.shmmin = in->shmmin; out.shmmni = in->shmmni; out.shmseg = in->shmseg; out.shmall = in->shmall; return copy_to_user(buf, &out, sizeof(out)); } default: return -EINVAL; } } |
f4566f048
|
515 |
/* |
b79521807
|
516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 |
* Calculate and add used RSS and swap pages of a shm. * Called with shm_ids.rw_mutex held as a reader */ static void shm_add_rss_swap(struct shmid_kernel *shp, unsigned long *rss_add, unsigned long *swp_add) { struct inode *inode; inode = shp->shm_file->f_path.dentry->d_inode; if (is_file_hugepages(shp->shm_file)) { struct address_space *mapping = inode->i_mapping; struct hstate *h = hstate_file(shp->shm_file); *rss_add += pages_per_huge_page(h) * mapping->nrpages; } else { #ifdef CONFIG_SHMEM struct shmem_inode_info *info = SHMEM_I(inode); spin_lock(&info->lock); *rss_add += inode->i_mapping->nrpages; *swp_add += info->swapped; spin_unlock(&info->lock); #else *rss_add += inode->i_mapping->nrpages; #endif } } /* |
3e148c799
|
544 |
* Called with shm_ids.rw_mutex held as a reader |
f4566f048
|
545 |
*/ |
4e9823111
|
546 547 |
static void shm_get_stat(struct ipc_namespace *ns, unsigned long *rss, unsigned long *swp) |
1da177e4c
|
548 |
{ |
7ca7e564e
|
549 550 |
int next_id; int total, in_use; |
1da177e4c
|
551 552 553 |
*rss = 0; *swp = 0; |
7ca7e564e
|
554 555 556 |
in_use = shm_ids(ns).in_use; for (total = 0, next_id = 0; total < in_use; next_id++) { |
e562aebc6
|
557 |
struct kern_ipc_perm *ipc; |
1da177e4c
|
558 |
struct shmid_kernel *shp; |
1da177e4c
|
559 |
|
e562aebc6
|
560 561 |
ipc = idr_find(&shm_ids(ns).ipcs_idr, next_id); if (ipc == NULL) |
1da177e4c
|
562 |
continue; |
e562aebc6
|
563 |
shp = container_of(ipc, struct shmid_kernel, shm_perm); |
1da177e4c
|
564 |
|
b79521807
|
565 |
shm_add_rss_swap(shp, rss, swp); |
7ca7e564e
|
566 567 |
total++; |
1da177e4c
|
568 569 |
} } |
8d4cc8b5c
|
570 571 572 573 574 575 576 |
/* * This function handles some shmctl commands which require the rw_mutex * to be held in write mode. * NOTE: no locks must be held, the rw_mutex is taken inside this function. */ static int shmctl_down(struct ipc_namespace *ns, int shmid, int cmd, struct shmid_ds __user *buf, int version) |
1da177e4c
|
577 |
{ |
8d4cc8b5c
|
578 |
struct kern_ipc_perm *ipcp; |
016d7132f
|
579 |
struct shmid64_ds shmid64; |
1da177e4c
|
580 |
struct shmid_kernel *shp; |
8d4cc8b5c
|
581 582 583 |
int err; if (cmd == IPC_SET) { |
016d7132f
|
584 |
if (copy_shmid_from_user(&shmid64, buf, version)) |
8d4cc8b5c
|
585 586 |
return -EFAULT; } |
b0e77598f
|
587 588 |
ipcp = ipcctl_pre_down(ns, &shm_ids(ns), shmid, cmd, &shmid64.shm_perm, 0); |
a5f75e7f2
|
589 590 |
if (IS_ERR(ipcp)) return PTR_ERR(ipcp); |
8d4cc8b5c
|
591 |
|
a5f75e7f2
|
592 |
shp = container_of(ipcp, struct shmid_kernel, shm_perm); |
8d4cc8b5c
|
593 594 595 596 597 598 599 600 601 |
err = security_shm_shmctl(shp, cmd); if (err) goto out_unlock; switch (cmd) { case IPC_RMID: do_shm_rmid(ns, ipcp); goto out_up; case IPC_SET: |
8f4a3809c
|
602 |
ipc_update_perm(&shmid64.shm_perm, ipcp); |
8d4cc8b5c
|
603 604 605 606 607 608 609 610 611 612 613 |
shp->shm_ctim = get_seconds(); break; default: err = -EINVAL; } out_unlock: shm_unlock(shp); out_up: up_write(&shm_ids(ns).rw_mutex); return err; } |
d5460c997
|
614 |
SYSCALL_DEFINE3(shmctl, int, shmid, int, cmd, struct shmid_ds __user *, buf) |
8d4cc8b5c
|
615 616 |
{ struct shmid_kernel *shp; |
1da177e4c
|
617 |
int err, version; |
4e9823111
|
618 |
struct ipc_namespace *ns; |
1da177e4c
|
619 620 621 622 623 624 625 |
if (cmd < 0 || shmid < 0) { err = -EINVAL; goto out; } version = ipc_parse_version(&cmd); |
4e9823111
|
626 |
ns = current->nsproxy->ipc_ns; |
1da177e4c
|
627 628 629 630 631 632 633 634 635 |
switch (cmd) { /* replace with proc interface ? */ case IPC_INFO: { struct shminfo64 shminfo; err = security_shm_shmctl(NULL, cmd); if (err) return err; |
e8148f758
|
636 |
memset(&shminfo, 0, sizeof(shminfo)); |
4e9823111
|
637 638 639 |
shminfo.shmmni = shminfo.shmseg = ns->shm_ctlmni; shminfo.shmmax = ns->shm_ctlmax; shminfo.shmall = ns->shm_ctlall; |
1da177e4c
|
640 641 642 643 |
shminfo.shmmin = SHMMIN; if(copy_shminfo_to_user (buf, &shminfo, version)) return -EFAULT; |
f4566f048
|
644 |
|
3e148c799
|
645 |
down_read(&shm_ids(ns).rw_mutex); |
7ca7e564e
|
646 |
err = ipc_get_maxid(&shm_ids(ns)); |
3e148c799
|
647 |
up_read(&shm_ids(ns).rw_mutex); |
f4566f048
|
648 |
|
1da177e4c
|
649 650 651 652 653 654 655 656 657 658 659 |
if(err<0) err = 0; goto out; } case SHM_INFO: { struct shm_info shm_info; err = security_shm_shmctl(NULL, cmd); if (err) return err; |
e8148f758
|
660 |
memset(&shm_info, 0, sizeof(shm_info)); |
3e148c799
|
661 |
down_read(&shm_ids(ns).rw_mutex); |
4e9823111
|
662 663 664 |
shm_info.used_ids = shm_ids(ns).in_use; shm_get_stat (ns, &shm_info.shm_rss, &shm_info.shm_swp); shm_info.shm_tot = ns->shm_tot; |
1da177e4c
|
665 666 |
shm_info.swap_attempts = 0; shm_info.swap_successes = 0; |
7ca7e564e
|
667 |
err = ipc_get_maxid(&shm_ids(ns)); |
3e148c799
|
668 |
up_read(&shm_ids(ns).rw_mutex); |
e8148f758
|
669 |
if (copy_to_user(buf, &shm_info, sizeof(shm_info))) { |
1da177e4c
|
670 671 672 673 674 675 676 677 678 679 680 681 |
err = -EFAULT; goto out; } err = err < 0 ? 0 : err; goto out; } case SHM_STAT: case IPC_STAT: { struct shmid64_ds tbuf; int result; |
023a53557
|
682 |
|
023a53557
|
683 684 685 686 687 688 |
if (cmd == SHM_STAT) { shp = shm_lock(ns, shmid); if (IS_ERR(shp)) { err = PTR_ERR(shp); goto out; } |
7ca7e564e
|
689 |
result = shp->shm_perm.id; |
1da177e4c
|
690 |
} else { |
023a53557
|
691 692 693 694 695 |
shp = shm_lock_check(ns, shmid); if (IS_ERR(shp)) { err = PTR_ERR(shp); goto out; } |
1da177e4c
|
696 697 |
result = 0; } |
e8148f758
|
698 |
err = -EACCES; |
b0e77598f
|
699 |
if (ipcperms(ns, &shp->shm_perm, S_IRUGO)) |
1da177e4c
|
700 701 702 703 |
goto out_unlock; err = security_shm_shmctl(shp, cmd); if (err) goto out_unlock; |
023a53557
|
704 |
memset(&tbuf, 0, sizeof(tbuf)); |
1da177e4c
|
705 706 707 708 709 710 711 |
kernel_to_ipc64_perm(&shp->shm_perm, &tbuf.shm_perm); tbuf.shm_segsz = shp->shm_segsz; tbuf.shm_atime = shp->shm_atim; tbuf.shm_dtime = shp->shm_dtim; tbuf.shm_ctime = shp->shm_ctim; tbuf.shm_cpid = shp->shm_cprid; tbuf.shm_lpid = shp->shm_lprid; |
bc56bba8f
|
712 |
tbuf.shm_nattch = shp->shm_nattch; |
1da177e4c
|
713 714 715 716 717 718 719 720 721 722 |
shm_unlock(shp); if(copy_shmid_to_user (buf, &tbuf, version)) err = -EFAULT; else err = result; goto out; } case SHM_LOCK: case SHM_UNLOCK: { |
89e004ea5
|
723 724 725 |
struct file *uninitialized_var(shm_file); lru_add_drain_all(); /* drain pagevecs to lru lists */ |
023a53557
|
726 727 728 |
shp = shm_lock_check(ns, shmid); if (IS_ERR(shp)) { err = PTR_ERR(shp); |
1da177e4c
|
729 730 |
goto out; } |
1da177e4c
|
731 |
|
a33e67510
|
732 |
audit_ipc_obj(&(shp->shm_perm)); |
073115d6b
|
733 |
|
b0e77598f
|
734 |
if (!ns_capable(ns->user_ns, CAP_IPC_LOCK)) { |
414c0708d
|
735 |
uid_t euid = current_euid(); |
1da177e4c
|
736 |
err = -EPERM; |
414c0708d
|
737 738 |
if (euid != shp->shm_perm.uid && euid != shp->shm_perm.cuid) |
1da177e4c
|
739 |
goto out_unlock; |
f1eb1332b
|
740 |
if (cmd == SHM_LOCK && !rlimit(RLIMIT_MEMLOCK)) |
1da177e4c
|
741 742 743 744 745 746 747 748 |
goto out_unlock; } err = security_shm_shmctl(shp, cmd); if (err) goto out_unlock; if(cmd==SHM_LOCK) { |
86a264abe
|
749 |
struct user_struct *user = current_user(); |
1da177e4c
|
750 751 |
if (!is_file_hugepages(shp->shm_file)) { err = shmem_lock(shp->shm_file, 1, user); |
7be77e20d
|
752 |
if (!err && !(shp->shm_perm.mode & SHM_LOCKED)){ |
b33291c0b
|
753 |
shp->shm_perm.mode |= SHM_LOCKED; |
1da177e4c
|
754 755 756 757 758 |
shp->mlock_user = user; } } } else if (!is_file_hugepages(shp->shm_file)) { shmem_lock(shp->shm_file, 0, shp->mlock_user); |
b33291c0b
|
759 |
shp->shm_perm.mode &= ~SHM_LOCKED; |
1da177e4c
|
760 761 762 763 764 765 |
shp->mlock_user = NULL; } shm_unlock(shp); goto out; } case IPC_RMID: |
1da177e4c
|
766 |
case IPC_SET: |
8d4cc8b5c
|
767 768 |
err = shmctl_down(ns, shmid, cmd, buf, version); return err; |
1da177e4c
|
769 |
default: |
8d4cc8b5c
|
770 |
return -EINVAL; |
1da177e4c
|
771 |
} |
1da177e4c
|
772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 |
out_unlock: shm_unlock(shp); out: return err; } /* * Fix shmaddr, allocate descriptor, map shm, add attach descriptor to lists. * * NOTE! Despite the name, this is NOT a direct system call entrypoint. The * "raddr" thing points to kernel space, and there has to be a wrapper around * this. */ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr) { struct shmid_kernel *shp; unsigned long addr; unsigned long size; struct file * file; int err; unsigned long flags; unsigned long prot; |
1da177e4c
|
794 |
int acc_mode; |
bc56bba8f
|
795 |
unsigned long user_addr; |
4e9823111
|
796 |
struct ipc_namespace *ns; |
bc56bba8f
|
797 798 |
struct shm_file_data *sfd; struct path path; |
aeb5d7270
|
799 |
fmode_t f_mode; |
1da177e4c
|
800 |
|
bc56bba8f
|
801 802 |
err = -EINVAL; if (shmid < 0) |
1da177e4c
|
803 |
goto out; |
bc56bba8f
|
804 |
else if ((addr = (ulong)shmaddr)) { |
1da177e4c
|
805 806 807 808 809 810 811 |
if (addr & (SHMLBA-1)) { if (shmflg & SHM_RND) addr &= ~(SHMLBA-1); /* round down */ else #ifndef __ARCH_FORCE_SHMLBA if (addr & ~PAGE_MASK) #endif |
bc56bba8f
|
812 |
goto out; |
1da177e4c
|
813 814 815 816 |
} flags = MAP_SHARED | MAP_FIXED; } else { if ((shmflg & SHM_REMAP)) |
bc56bba8f
|
817 |
goto out; |
1da177e4c
|
818 819 820 821 822 823 |
flags = MAP_SHARED; } if (shmflg & SHM_RDONLY) { prot = PROT_READ; |
1da177e4c
|
824 |
acc_mode = S_IRUGO; |
bc56bba8f
|
825 |
f_mode = FMODE_READ; |
1da177e4c
|
826 827 |
} else { prot = PROT_READ | PROT_WRITE; |
1da177e4c
|
828 |
acc_mode = S_IRUGO | S_IWUGO; |
bc56bba8f
|
829 |
f_mode = FMODE_READ | FMODE_WRITE; |
1da177e4c
|
830 831 832 833 834 835 836 837 838 839 |
} if (shmflg & SHM_EXEC) { prot |= PROT_EXEC; acc_mode |= S_IXUGO; } /* * We cannot rely on the fs check since SYSV IPC does have an * additional creator id... */ |
4e9823111
|
840 |
ns = current->nsproxy->ipc_ns; |
023a53557
|
841 842 843 |
shp = shm_lock_check(ns, shmid); if (IS_ERR(shp)) { err = PTR_ERR(shp); |
1da177e4c
|
844 |
goto out; |
023a53557
|
845 |
} |
bc56bba8f
|
846 847 |
err = -EACCES; |
b0e77598f
|
848 |
if (ipcperms(ns, &shp->shm_perm, acc_mode)) |
bc56bba8f
|
849 |
goto out_unlock; |
1da177e4c
|
850 851 |
err = security_shm_shmat(shp, shmaddr, shmflg); |
bc56bba8f
|
852 853 |
if (err) goto out_unlock; |
2c48b9c45
|
854 855 |
path = shp->shm_file->f_path; path_get(&path); |
1da177e4c
|
856 |
shp->shm_nattch++; |
bc56bba8f
|
857 |
size = i_size_read(path.dentry->d_inode); |
1da177e4c
|
858 |
shm_unlock(shp); |
bc56bba8f
|
859 860 861 |
err = -ENOMEM; sfd = kzalloc(sizeof(*sfd), GFP_KERNEL); if (!sfd) |
ce8d2cdf3
|
862 |
goto out_put_dentry; |
bc56bba8f
|
863 |
|
2c48b9c45
|
864 865 |
file = alloc_file(&path, f_mode, is_file_hugepages(shp->shm_file) ? |
c4caa7781
|
866 867 |
&shm_file_operations_huge : &shm_file_operations); |
bc56bba8f
|
868 869 |
if (!file) goto out_free; |
bc56bba8f
|
870 |
file->private_data = sfd; |
bc56bba8f
|
871 |
file->f_mapping = shp->shm_file->f_mapping; |
7ca7e564e
|
872 |
sfd->id = shp->shm_perm.id; |
bc56bba8f
|
873 874 875 |
sfd->ns = get_ipc_ns(ns); sfd->file = shp->shm_file; sfd->vm_ops = NULL; |
1da177e4c
|
876 877 |
down_write(¤t->mm->mmap_sem); if (addr && !(shmflg & SHM_REMAP)) { |
bc56bba8f
|
878 |
err = -EINVAL; |
1da177e4c
|
879 880 881 882 883 884 885 886 887 888 889 |
if (find_vma_intersection(current->mm, addr, addr + size)) goto invalid; /* * If shm segment goes below stack, make sure there is some * space left for the stack to grow (at least 4 pages). */ if (addr < current->mm->start_stack && addr > current->mm->start_stack - size - PAGE_SIZE * 5) goto invalid; } |
bc56bba8f
|
890 891 892 893 894 |
user_addr = do_mmap (file, addr, size, prot, flags, 0); *raddr = user_addr; err = 0; if (IS_ERR_VALUE(user_addr)) err = (long)user_addr; |
1da177e4c
|
895 896 |
invalid: up_write(¤t->mm->mmap_sem); |
bc56bba8f
|
897 898 899 |
fput(file); out_nattch: |
3e148c799
|
900 |
down_write(&shm_ids(ns).rw_mutex); |
00c2bf85d
|
901 |
shp = shm_lock(ns, shmid); |
023a53557
|
902 |
BUG_ON(IS_ERR(shp)); |
1da177e4c
|
903 904 |
shp->shm_nattch--; if(shp->shm_nattch == 0 && |
b33291c0b
|
905 |
shp->shm_perm.mode & SHM_DEST) |
4e9823111
|
906 |
shm_destroy(ns, shp); |
1da177e4c
|
907 908 |
else shm_unlock(shp); |
3e148c799
|
909 |
up_write(&shm_ids(ns).rw_mutex); |
1da177e4c
|
910 |
|
1da177e4c
|
911 912 |
out: return err; |
bc56bba8f
|
913 914 915 916 917 918 919 |
out_unlock: shm_unlock(shp); goto out; out_free: kfree(sfd); |
ce8d2cdf3
|
920 |
out_put_dentry: |
2c48b9c45
|
921 |
path_put(&path); |
bc56bba8f
|
922 |
goto out_nattch; |
1da177e4c
|
923 |
} |
d5460c997
|
924 |
SYSCALL_DEFINE3(shmat, int, shmid, char __user *, shmaddr, int, shmflg) |
7d87e14c2
|
925 926 927 928 929 930 931 932 933 934 |
{ unsigned long ret; long err; err = do_shmat(shmid, shmaddr, shmflg, &ret); if (err) return err; force_successful_syscall_return(); return (long)ret; } |
1da177e4c
|
935 936 937 938 |
/* * detach and kill segment if marked destroyed. * The work is done in shm_close. */ |
d5460c997
|
939 |
SYSCALL_DEFINE1(shmdt, char __user *, shmaddr) |
1da177e4c
|
940 941 |
{ struct mm_struct *mm = current->mm; |
586c7e6a2
|
942 |
struct vm_area_struct *vma; |
1da177e4c
|
943 |
unsigned long addr = (unsigned long)shmaddr; |
1da177e4c
|
944 |
int retval = -EINVAL; |
586c7e6a2
|
945 946 947 948 |
#ifdef CONFIG_MMU loff_t size = 0; struct vm_area_struct *next; #endif |
1da177e4c
|
949 |
|
df1e2fb54
|
950 951 |
if (addr & ~PAGE_MASK) return retval; |
1da177e4c
|
952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 |
down_write(&mm->mmap_sem); /* * This function tries to be smart and unmap shm segments that * were modified by partial mlock or munmap calls: * - It first determines the size of the shm segment that should be * unmapped: It searches for a vma that is backed by shm and that * started at address shmaddr. It records it's size and then unmaps * it. * - Then it unmaps all shm vmas that started at shmaddr and that * are within the initially determined size. * Errors from do_munmap are ignored: the function only fails if * it's called with invalid parameters or if it's called to unmap * a part of a vma. Both calls in this function are for full vmas, * the parameters are directly copied from the vma itself and always * valid - therefore do_munmap cannot fail. (famous last words?) */ /* * If it had been mremap()'d, the starting address would not * match the usual checks anyway. So assume all vma's are * above the starting address given. */ vma = find_vma(mm, addr); |
8feae1311
|
975 |
#ifdef CONFIG_MMU |
1da177e4c
|
976 977 978 979 980 981 982 983 |
while (vma) { next = vma->vm_next; /* * Check if the starting address would match, i.e. it's * a fragment created by mprotect() and/or munmap(), or it * otherwise it starts at this address with no hassles. */ |
bc56bba8f
|
984 |
if ((vma->vm_ops == &shm_vm_ops) && |
1da177e4c
|
985 |
(vma->vm_start - addr)/PAGE_SIZE == vma->vm_pgoff) { |
6d63079ad
|
986 |
size = vma->vm_file->f_path.dentry->d_inode->i_size; |
1da177e4c
|
987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 |
do_munmap(mm, vma->vm_start, vma->vm_end - vma->vm_start); /* * We discovered the size of the shm segment, so * break out of here and fall through to the next * loop that uses the size information to stop * searching for matching vma's. */ retval = 0; vma = next; break; } vma = next; } /* * We need look no further than the maximum address a fragment * could possibly have landed at. Also cast things to loff_t to |
25985edce
|
1004 |
* prevent overflows and make comparisons vs. equal-width types. |
1da177e4c
|
1005 |
*/ |
8e36709d8
|
1006 |
size = PAGE_ALIGN(size); |
1da177e4c
|
1007 1008 1009 1010 |
while (vma && (loff_t)(vma->vm_end - addr) <= size) { next = vma->vm_next; /* finding a matching vma now does not alter retval */ |
bc56bba8f
|
1011 |
if ((vma->vm_ops == &shm_vm_ops) && |
1da177e4c
|
1012 1013 1014 1015 1016 |
(vma->vm_start - addr)/PAGE_SIZE == vma->vm_pgoff) do_munmap(mm, vma->vm_start, vma->vm_end - vma->vm_start); vma = next; } |
8feae1311
|
1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 |
#else /* CONFIG_MMU */ /* under NOMMU conditions, the exact address to be destroyed must be * given */ retval = -EINVAL; if (vma->vm_start == addr && vma->vm_ops == &shm_vm_ops) { do_munmap(mm, vma->vm_start, vma->vm_end - vma->vm_start); retval = 0; } #endif |
1da177e4c
|
1027 1028 1029 1030 1031 |
up_write(&mm->mmap_sem); return retval; } #ifdef CONFIG_PROC_FS |
19b4946ca
|
1032 |
static int sysvipc_shm_proc_show(struct seq_file *s, void *it) |
1da177e4c
|
1033 |
{ |
19b4946ca
|
1034 |
struct shmid_kernel *shp = it; |
b79521807
|
1035 1036 1037 |
unsigned long rss = 0, swp = 0; shm_add_rss_swap(shp, &rss, &swp); |
1da177e4c
|
1038 |
|
6c826818f
|
1039 1040 1041 1042 1043 |
#if BITS_PER_LONG <= 32 #define SIZE_SPEC "%10lu" #else #define SIZE_SPEC "%21lu" #endif |
1da177e4c
|
1044 |
|
6c826818f
|
1045 1046 |
return seq_printf(s, "%10d %10d %4o " SIZE_SPEC " %5u %5u " |
b79521807
|
1047 1048 1049 |
"%5lu %5u %5u %5u %5u %10lu %10lu %10lu " SIZE_SPEC " " SIZE_SPEC " ", |
19b4946ca
|
1050 |
shp->shm_perm.key, |
7ca7e564e
|
1051 |
shp->shm_perm.id, |
b33291c0b
|
1052 |
shp->shm_perm.mode, |
19b4946ca
|
1053 1054 1055 |
shp->shm_segsz, shp->shm_cprid, shp->shm_lprid, |
bc56bba8f
|
1056 |
shp->shm_nattch, |
19b4946ca
|
1057 1058 1059 1060 1061 1062 |
shp->shm_perm.uid, shp->shm_perm.gid, shp->shm_perm.cuid, shp->shm_perm.cgid, shp->shm_atim, shp->shm_dtim, |
b79521807
|
1063 1064 1065 |
shp->shm_ctim, rss * PAGE_SIZE, swp * PAGE_SIZE); |
1da177e4c
|
1066 1067 |
} #endif |