HCoop / hcoop / debian / openafs.git / blame
| Commit | Line | Data |
|---|---|---|
| 805e021f CE |
1 | /* |
| 2 | * Copyright 2000, International Business Machines Corporation and others. | |
| 3 | * All Rights Reserved. | |
| 4 | * | |
| 5 | * This software has been released under the terms of the IBM Public | |
| 6 | * License. For details, see the LICENSE file in the top-level source | |
| 7 | * directory or online at http://www.openafs.org/dl/license10.html | |
| 8 | */ | |
| 9 | ||
| 10 | #include <afsconfig.h> | |
| 11 | #include "afs/param.h" | |
| 12 | ||
| 13 | ||
| 14 | #include "afs/sysincludes.h" /* Standard vendor system headers */ | |
| 15 | #include "afsincludes.h" /* Afs-based standard headers */ | |
| 16 | #include "afs/afs_stats.h" /* afs statistics */ | |
| 17 | ||
| 18 | #if AFS_GCPAGS | |
| 19 | ||
| 20 | /* afs_osi_TraverseProcTable() - Walk through the systems process | |
| 21 | * table, calling afs_GCPAGs_perproc_func() for each process. | |
| 22 | */ | |
| 23 | ||
| 24 | ||
| 25 | #ifdef EXPORTED_TASKLIST_LOCK | |
| 26 | extern rwlock_t tasklist_lock __attribute__((weak)); | |
| 27 | #endif | |
| 28 | void | |
| 29 | afs_osi_TraverseProcTable(void) | |
| 30 | { | |
| 31 | #if !defined(LINUX_KEYRING_SUPPORT) && (!defined(STRUCT_TASK_STRUCT_HAS_CRED) || defined(HAVE_LINUX_RCU_READ_LOCK)) | |
| 32 | struct task_struct *p; | |
| 33 | ||
| 34 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) && defined(EXPORTED_TASKLIST_LOCK) | |
| 35 | if (&tasklist_lock) | |
| 36 | read_lock(&tasklist_lock); | |
| 37 | #endif /* EXPORTED_TASKLIST_LOCK */ | |
| 38 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16) | |
| 39 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) && defined(EXPORTED_TASKLIST_LOCK) | |
| 40 | else | |
| 41 | #endif /* EXPORTED_TASKLIST_LOCK && LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) */ | |
| 42 | rcu_read_lock(); | |
| 43 | #endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16) */ | |
| 44 | ||
| 45 | #if defined(for_each_process) | |
| 46 | for_each_process(p) if (p->pid) { | |
| 47 | #ifdef STRUCT_TASK_STRUCT_HAS_EXIT_STATE | |
| 48 | if (p->exit_state) | |
| 49 | continue; | |
| 50 | #else | |
| 51 | if (p->state & TASK_ZOMBIE) | |
| 52 | continue; | |
| 53 | #endif | |
| 54 | afs_GCPAGs_perproc_func(p); | |
| 55 | } | |
| 56 | #else | |
| 57 | for_each_task(p) if (p->pid) { | |
| 58 | #ifdef STRUCT_TASK_STRUCT_HAS_EXIT_STATE | |
| 59 | if (p->exit_state) | |
| 60 | continue; | |
| 61 | #else | |
| 62 | if (p->state & TASK_ZOMBIE) | |
| 63 | continue; | |
| 64 | #endif | |
| 65 | afs_GCPAGs_perproc_func(p); | |
| 66 | } | |
| 67 | #endif | |
| 68 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) && defined(EXPORTED_TASKLIST_LOCK) | |
| 69 | if (&tasklist_lock) | |
| 70 | read_unlock(&tasklist_lock); | |
| 71 | #endif /* EXPORTED_TASKLIST_LOCK */ | |
| 72 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16) | |
| 73 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) && defined(EXPORTED_TASKLIST_LOCK) | |
| 74 | else | |
| 75 | #endif /* EXPORTED_TASKLIST_LOCK && LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18) */ | |
| 76 | rcu_read_unlock(); | |
| 77 | #endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16) */ | |
| 78 | #endif | |
| 79 | } | |
| 80 | ||
| 81 | /* return a pointer (sometimes a static copy ) to the cred for a | |
| 82 | * given afs_proc_t. | |
| 83 | * subsequent calls may overwrite the previously returned value. | |
| 84 | */ | |
| 85 | ||
| 86 | #if !defined(LINUX_KEYRING_SUPPORT) && (!defined(STRUCT_TASK_STRUCT_HAS_CRED) || defined(HAVE_LINUX_RCU_READ_LOCK)) | |
| 87 | const afs_ucred_t * | |
| 88 | afs_osi_proc2cred(afs_proc_t * pr) | |
| 89 | { | |
| 90 | afs_ucred_t *rv = NULL; | |
| 91 | static afs_ucred_t cr; | |
| 92 | ||
| 93 | if (pr == NULL) { | |
| 94 | return NULL; | |
| 95 | } | |
| 96 | ||
| 97 | if ((pr->state == TASK_RUNNING) || (pr->state == TASK_INTERRUPTIBLE) | |
| 98 | || (pr->state == TASK_UNINTERRUPTIBLE) | |
| 99 | || (pr->state == TASK_STOPPED)) { | |
| 100 | /* This is dangerous. If anyone ever crfree's the cred that's | |
| 101 | * returned from here, we'll go boom, because it's statically | |
| 102 | * allocated. */ | |
| 103 | atomic_set(&cr.cr_ref, 1); | |
| 104 | afs_set_cr_uid(&cr, task_uid(pr)); | |
| 105 | #if defined(STRUCT_TASK_STRUCT_HAS_CRED) | |
| 106 | get_group_info(pr->cred->group_info); | |
| 107 | afs_set_cr_group_info(&cr, pr->cred->group_info); | |
| 108 | #else | |
| 109 | get_group_info(pr->group_info); | |
| 110 | afs_set_cr_group_info(&cr, pr->group_info); | |
| 111 | #endif | |
| 112 | rv = &cr; | |
| 113 | } | |
| 114 | ||
| 115 | return rv; | |
| 116 | } | |
| 117 | #endif | |
| 118 | ||
| 119 | #endif /* AFS_GCPAGS */ |