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incubator-nuttx/fs/procfs/fs_procfsmeminfo.c

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/****************************************************************************
* 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 <nuttx/config.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdint.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/kmalloc.h>
#include <nuttx/pgalloc.h>
#include <nuttx/progmem.h>
#include <nuttx/mm/mm.h>
#include <nuttx/fs/fs.h>
#include <nuttx/fs/procfs.h>
#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);
#ifdef CONFIG_DEBUG_MM
linesize = procfs_snprintf(procfile->line, MEMINFO_LINELEN,
"usage: <pid/used/free/on/off>\n"
"on/off backtrace\n"
"pid: dump pid allocated node\n");
#else
linesize = procfs_snprintf(procfile->line, MEMINFO_LINELEN,
"usage: <used/free>\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);
#ifdef CONFIG_DEBUG_MM
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;
#ifdef CONFIG_DEBUG_MM
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)
{
entry->next = g_procfs_meminfo;
g_procfs_meminfo = entry;
}
#endif /* !CONFIG_FS_PROCFS_EXCLUDE_MEMINFO */
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