| 1 | /* |
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| 2 | * sys_closedir.c - Close an open VFS directory. |
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| 3 | * |
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| 4 | * Author Alain Greiner (2016,2017,2018) |
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| 5 | * |
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| 6 | * Copyright (c) UPMC Sorbonne Universites |
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| 7 | * |
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| 8 | * This file is part of ALMOS-MKH. |
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| 9 | * |
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| 10 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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| 11 | * under the terms of the GNU General Public License as published by |
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| 12 | * the Free Software Foundation; version 2.0 of the License. |
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| 13 | * |
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| 14 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 17 | * General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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| 21 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 22 | */ |
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| 23 | |
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| 24 | #include <kernel_config.h> |
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| 25 | #include <hal_kernel_types.h> |
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| 26 | #include <vfs.h> |
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| 27 | #include <printk.h> |
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| 28 | #include <thread.h> |
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| 29 | #include <process.h> |
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| 30 | #include <remote_dir.h> |
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| 31 | #include <errno.h> |
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| 32 | #include <syscalls.h> |
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| 33 | #include <shared_syscalls.h> |
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| 34 | |
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| 35 | /////////////////////////////// |
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| 36 | int sys_closedir ( DIR * dirp ) |
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| 37 | { |
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| 38 | xptr_t dir_xp; // extended pointer on remote_dir_t structure |
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| 39 | |
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| 40 | thread_t * this = CURRENT_THREAD; // client thread |
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| 41 | process_t * process = this->process; // client process |
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| 42 | |
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| 43 | #if (DEBUG_SYS_CLOSEDIR || CONFIG_INSTRUMENTATION_SYSCALLS) |
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| 44 | uint64_t tm_start = hal_get_cycles(); |
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| 45 | #endif |
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| 46 | |
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| 47 | #if DEBUG_SYS_CLOSEDIR |
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| 48 | if( DEBUG_SYS_CLOSEDIR < tm_start ) |
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| 49 | printk("\n[%s] thread[%x,%x] enter for DIR <%x> / cycle %d\n", |
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| 50 | __FUNCTION__, process->pid, this->trdid, dirp, (uint32_t)tm_start ); |
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| 51 | #endif |
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| 52 | |
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| 53 | // get extended pointer on kernel remote_dir_t structure from dirp |
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| 54 | dir_xp = remote_dir_from_ident( (intptr_t)dirp ); |
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| 55 | |
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| 56 | if( dir_xp == XPTR_NULL ) |
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| 57 | { |
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| 58 | |
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| 59 | #if DEBUG_SYSCALLS_ERROR |
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| 60 | printk("\n[ERROR] in %s / thread[%x,%x] : DIR pointer %x not registered\n", |
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| 61 | __FUNCTION__ , process->pid , this->trdid, dirp ); |
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| 62 | #endif |
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| 63 | this->errno = EINVAL; |
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| 64 | return -1; |
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| 65 | } |
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| 66 | |
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| 67 | // delete kernel remote_dir_t structure |
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| 68 | remote_dir_destroy( dir_xp ); |
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| 69 | |
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| 70 | hal_fence(); |
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| 71 | |
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| 72 | #if (DEBUG_SYS_CLOSEDIR || CONFIG_INSTRUMENTATION_SYSCALLS) |
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| 73 | uint64_t tm_end = hal_get_cycles(); |
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| 74 | #endif |
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| 75 | |
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| 76 | #if DEBUG_SYS_CLOSEDIR |
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| 77 | if( DEBUG_SYS_CLOSEDIR < tm_end ) |
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| 78 | printk("\n[%s] thread[%x,%x] exit for DIR <%x> / cycle %d\n", |
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| 79 | __FUNCTION__, process->pid, this->trdid, dirp, (uint32_t)tm_end ); |
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| 80 | #endif |
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| 81 | |
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| 82 | #if CONFIG_INSTRUMENTATION_SYSCALLS |
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| 83 | hal_atomic_add( &syscalls_cumul_cost[SYS_CLOSEDIR] , tm_end - tm_start ); |
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| 84 | hal_atomic_add( &syscalls_occurences[SYS_CLOSEDIR] , 1 ); |
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| 85 | #endif |
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| 86 | |
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| 87 | return 0; |
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| 88 | |
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| 89 | } // end sys_closedir() |
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