/**************************************************************************** * fs/procfs/fs_procfsmeminfo.c * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. The * ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the * License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef CONFIG_FS_PROCFS_EXCLUDE_MEMINFO /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Determines the size of an intermediate buffer that must be large enough * to handle the longest line generated by this logic. */ #define MEMINFO_LINELEN 80 /**************************************************************************** * Private Types ****************************************************************************/ /* This structure describes one open "file" */ struct meminfo_file_s { struct procfs_file_s base; /* Base open file structure */ unsigned int linesize; /* Number of valid characters in line[] */ char line[MEMINFO_LINELEN]; /* Pre-allocated buffer for formatted lines */ }; #if defined(CONFIG_ARCH_HAVE_PROGMEM) && defined(CONFIG_FS_PROCFS_INCLUDE_PROGMEM) struct progmem_info_s { int arena; /* Total size of available progmem. */ int ordblks; /* This is the number of free chunks */ int aordblks; /* This is the number of allocated chunks */ int mxordblk; /* Size of the largest free chunk */ int uordblks; /* Total size of memory for allocated chunks */ int fordblks; /* Total size of memory for free chunks. */ }; #endif /**************************************************************************** * Private Function Prototypes ****************************************************************************/ #if defined(CONFIG_ARCH_HAVE_PROGMEM) && defined(CONFIG_FS_PROCFS_INCLUDE_PROGMEM) static void meminfo_progmem(FAR struct progmem_info_s *progmem); #endif /* File system methods */ static int meminfo_open(FAR struct file *filep, FAR const char *relpath, int oflags, mode_t mode); static int meminfo_close(FAR struct file *filep); #ifndef CONFIG_FS_PROCFS_EXCLUDE_MEMDUMP static ssize_t memdump_read(FAR struct file *filep, FAR char *buffer, size_t buflen); static ssize_t memdump_write(FAR struct file *filep, FAR const char *buffer, size_t buflen); #endif static ssize_t meminfo_read(FAR struct file *filep, FAR char *buffer, size_t buflen); static int meminfo_dup(FAR const struct file *oldp, FAR struct file *newp); static int meminfo_stat(FAR const char *relpath, FAR struct stat *buf); /**************************************************************************** * Public Data ****************************************************************************/ /* See fs_mount.c -- this structure is explicitly externed there. * We use the old-fashioned kind of initializers so that this will compile * with any compiler. */ const struct procfs_operations meminfo_operations = { meminfo_open, /* open */ meminfo_close, /* close */ meminfo_read, /* read */ NULL, /* write */ meminfo_dup, /* dup */ NULL, /* opendir */ NULL, /* closedir */ NULL, /* readdir */ NULL, /* rewinddir */ meminfo_stat /* stat */ }; #ifndef CONFIG_FS_PROCFS_EXCLUDE_MEMDUMP const struct procfs_operations memdump_operations = { meminfo_open, /* open */ meminfo_close, /* close */ memdump_read, /* read */ memdump_write, /* write */ meminfo_dup, /* dup */ NULL, /* opendir */ NULL, /* closedir */ NULL, /* readdir */ NULL, /* rewinddir */ meminfo_stat /* stat */ }; #endif FAR struct procfs_meminfo_entry_s *g_procfs_meminfo = NULL; /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Name: meminfo_progmem * * Description: * The moral equivalent of mallinfo() for prog mem * * TODO Max block size only works on uniform prog mem * ****************************************************************************/ #if defined(CONFIG_ARCH_HAVE_PROGMEM) && defined(CONFIG_FS_PROCFS_INCLUDE_PROGMEM) static void meminfo_progmem(FAR struct progmem_info_s *progmem) { size_t page = 0; size_t stpage = 0xffff; size_t pagesize = 0; ssize_t status; progmem->arena = 0; progmem->ordblks = 0; progmem->aordblks = 0; progmem->fordblks = 0; progmem->uordblks = 0; progmem->mxordblk = 0; for (status = 0, page = 0; status >= 0; page++) { status = up_progmem_ispageerased(page); pagesize = up_progmem_pagesize(page); progmem->arena += pagesize; /* Is this beginning of new free space section */ if (status == 0) { if (stpage == 0xffff) { stpage = page; } progmem->fordblks += pagesize; progmem->ordblks++; } else if (status != 0) { progmem->aordblks++; progmem->uordblks += pagesize; if (stpage != 0xffff && up_progmem_isuniform()) { stpage = page - stpage; if (stpage > progmem->mxordblk) { progmem->mxordblk = stpage; } stpage = 0xffff; } } } progmem->mxordblk *= pagesize; } #endif /**************************************************************************** * Name: meminfo_open ****************************************************************************/ static int meminfo_open(FAR struct file *filep, FAR const char *relpath, int oflags, mode_t mode) { FAR struct meminfo_file_s *procfile; finfo("Open '%s'\n", relpath); /* Allocate a container to hold the file attributes */ procfile = kmm_zalloc(sizeof(struct meminfo_file_s)); if (!procfile) { ferr("ERROR: Failed to allocate file attributes\n"); return -ENOMEM; } /* Save the attributes as the open-specific state in filep->f_priv */ filep->f_priv = procfile; return OK; } /**************************************************************************** * Name: meminfo_close ****************************************************************************/ static int meminfo_close(FAR struct file *filep) { FAR struct meminfo_file_s *procfile; /* Recover our private data from the struct file instance */ procfile = (FAR struct meminfo_file_s *)filep->f_priv; DEBUGASSERT(procfile); /* Release the file attributes structure */ kmm_free(procfile); filep->f_priv = NULL; return OK; } /**************************************************************************** * Name: meminfo_read ****************************************************************************/ static ssize_t meminfo_read(FAR struct file *filep, FAR char *buffer, size_t buflen) { FAR struct meminfo_file_s *procfile; size_t linesize; size_t copysize; size_t totalsize; off_t offset; finfo("buffer=%p buflen=%d\n", buffer, (int)buflen); DEBUGASSERT(filep != NULL && buffer != NULL && buflen > 0); offset = filep->f_pos; /* Recover our private data from the struct file instance */ procfile = (FAR struct meminfo_file_s *)filep->f_priv; DEBUGASSERT(procfile); /* The first line is the headers */ linesize = procfs_snprintf(procfile->line, MEMINFO_LINELEN, "%13s%11s%11s%11s%11s%7s%7s\n", "", "total", "used", "free", "largest", "nused", "nfree"); copysize = procfs_memcpy(procfile->line, linesize, buffer, buflen, &offset); totalsize = copysize; /* Followed by information about the memory resources */ FAR const struct procfs_meminfo_entry_s *entry; for (entry = g_procfs_meminfo; entry != NULL; entry = entry->next) { if (totalsize < buflen) { struct mallinfo minfo; buffer += copysize; buflen -= copysize; /* Show heap information */ mm_mallinfo(entry->heap, &minfo); linesize = procfs_snprintf(procfile->line, MEMINFO_LINELEN, "%12s:%11lu%11lu%11lu%11lu%7lu%7lu\n", entry->name, (unsigned long)minfo.arena, (unsigned long)minfo.uordblks, (unsigned long)minfo.fordblks, (unsigned long)minfo.mxordblk, (unsigned long)minfo.aordblks, (unsigned long)minfo.ordblks); copysize = procfs_memcpy(procfile->line, linesize, buffer, buflen, &offset); totalsize += copysize; } } #ifdef CONFIG_MM_PGALLOC if (totalsize < buflen) { struct pginfo_s pginfo; unsigned long total; unsigned long available; unsigned long allocated; unsigned long max; buffer += copysize; buflen -= copysize; /* Show page allocator information */ mm_pginfo(&pginfo); total = (unsigned long)pginfo.ntotal << MM_PGSHIFT; available = (unsigned long)pginfo.nfree << MM_PGSHIFT; allocated = total - available; max = (unsigned long)pginfo.mxfree << MM_PGSHIFT; linesize = procfs_snprintf(procfile->line, MEMINFO_LINELEN, "%12s:%11lu%11lu%11lu%11lu\n", "Page", total, allocated, available, max); copysize = procfs_memcpy(procfile->line, linesize, buffer, buflen, &offset); totalsize += copysize; } #endif #if defined(CONFIG_ARCH_HAVE_PROGMEM) && defined(CONFIG_FS_PROCFS_INCLUDE_PROGMEM) if (totalsize < buflen) { struct progmem_info_s progmem; buffer += copysize; buflen -= copysize; /* The second line is the memory data */ meminfo_progmem(&progmem); linesize = procfs_snprintf(procfile->line, MEMINFO_LINELEN, "%12s:%11lu%11lu%11lu%11lu%7lu%7lu\n", "Prog", (unsigned long)progmem.arena, (unsigned long)progmem.uordblks, (unsigned long)progmem.fordblks, (unsigned long)progmem.mxordblk, (unsigned long)progmem.aordblks, (unsigned long)progmem.ordblks); copysize = procfs_memcpy(procfile->line, linesize, buffer, buflen, &offset); totalsize += copysize; } #endif /* Update the file offset */ filep->f_pos += totalsize; return totalsize; } /**************************************************************************** * Name: memdump_read ****************************************************************************/ #ifndef CONFIG_FS_PROCFS_EXCLUDE_MEMDUMP static ssize_t memdump_read(FAR struct file *filep, FAR char *buffer, size_t buflen) { FAR struct meminfo_file_s *procfile; size_t linesize; size_t copysize; size_t totalsize; off_t offset; finfo("buffer=%p buflen=%d\n", buffer, (int)buflen); DEBUGASSERT(filep != NULL && buffer != NULL && buflen > 0); offset = filep->f_pos; /* Recover our private data from the struct file instance */ procfile = (FAR struct meminfo_file_s *)filep->f_priv; DEBUGASSERT(procfile); #if CONFIG_MM_BACKTRACE >= 0 linesize = procfs_snprintf(procfile->line, MEMINFO_LINELEN, "usage: \n" "on/off backtrace\n" "pid: dump pid allocated node\n"); #else linesize = procfs_snprintf(procfile->line, MEMINFO_LINELEN, "usage: \n"); #endif copysize = procfs_memcpy(procfile->line, linesize, buffer, buflen, &offset); totalsize = copysize; buffer += copysize; buflen -= copysize; linesize = procfs_snprintf(procfile->line, MEMINFO_LINELEN, "used: dump all allocated node\n" "free: dump all free node\n"); totalsize += procfs_memcpy(procfile->line, linesize, buffer, buflen, &offset); filep->f_pos += totalsize; return totalsize; } #endif /**************************************************************************** * Name: memdump_write ****************************************************************************/ #ifndef CONFIG_FS_PROCFS_EXCLUDE_MEMDUMP static ssize_t memdump_write(FAR struct file *filep, FAR const char *buffer, size_t buflen) { FAR struct procfs_meminfo_entry_s *entry; FAR struct meminfo_file_s *procfile; pid_t pid = INVALID_PROCESS_ID; DEBUGASSERT(filep != NULL && buffer != NULL && buflen > 0); /* Recover our private data from the struct file instance */ procfile = filep->f_priv; DEBUGASSERT(procfile); #if CONFIG_MM_BACKTRACE > 0 if (strcmp(buffer, "on") == 0) { for (entry = g_procfs_meminfo; entry != NULL; entry = entry->next) { entry->backtrace = true; } return buflen; } else if (strcmp(buffer, "off") == 0) { for (entry = g_procfs_meminfo; entry != NULL; entry = entry->next) { entry->backtrace = false; } return buflen; } #endif switch (buffer[0]) { case 'u': pid = (pid_t)-1; break; case 'f': pid = (pid_t)-2; break; #if CONFIG_MM_BACKTRACE >= 0 default: pid = atoi(buffer); #endif } for (entry = g_procfs_meminfo; entry != NULL; entry = entry->next) { mm_memdump(entry->heap, pid); } return buflen; } #endif /**************************************************************************** * Name: meminfo_dup * * Description: * Duplicate open file data in the new file structure. * ****************************************************************************/ static int meminfo_dup(FAR const struct file *oldp, FAR struct file *newp) { FAR struct meminfo_file_s *oldattr; FAR struct meminfo_file_s *newattr; finfo("Dup %p->%p\n", oldp, newp); /* Recover our private data from the old struct file instance */ oldattr = (FAR struct meminfo_file_s *)oldp->f_priv; DEBUGASSERT(oldattr); /* Allocate a new container to hold the task and attribute selection */ newattr = (FAR struct meminfo_file_s *) kmm_malloc(sizeof(struct meminfo_file_s)); if (!newattr) { ferr("ERROR: Failed to allocate file attributes\n"); return -ENOMEM; } /* The copy the file attributes from the old attributes to the new */ memcpy(newattr, oldattr, sizeof(struct meminfo_file_s)); /* Save the new attributes in the new file structure */ newp->f_priv = (FAR void *)newattr; return OK; } /**************************************************************************** * Name: meminfo_stat * * Description: Return information about a file or directory * ****************************************************************************/ static int meminfo_stat(FAR const char *relpath, FAR struct stat *buf) { /* "meminfo" is the name for a read-only file */ memset(buf, 0, sizeof(struct stat)); buf->st_mode = S_IFREG | S_IROTH | S_IRGRP | S_IRUSR; return OK; } /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: procfs_register_meminfo * * Description: * Add a new meminfo entry to the procfs file system. * * Input Parameters: * entry - Describes the entry to be registered. * ****************************************************************************/ void procfs_register_meminfo(FAR struct procfs_meminfo_entry_s *entry) { if (NULL == entry->name) { return; } entry->next = g_procfs_meminfo; g_procfs_meminfo = entry; } /**************************************************************************** * Name: procfs_unregister_meminfo * * Description: * Remove a meminfo entry from the procfs file system. * * Input Parameters: * entry - Describes the entry to be unregistered. * ****************************************************************************/ void procfs_unregister_meminfo(FAR struct procfs_meminfo_entry_s *entry) { FAR struct procfs_meminfo_entry_s **cur; for (cur = &g_procfs_meminfo; *cur != NULL; cur = &(*cur)->next) { if (*cur == entry) { *cur = entry->next; break; } } } #endif /* !CONFIG_FS_PROCFS_EXCLUDE_MEMINFO */