123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487 |
- /****************************************************************************
- * fs/procfs/fs_procfsmeminfo.c
- *
- * Copyright (C) 2016-2017 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
- /****************************************************************************
- * 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 54
- /****************************************************************************
- * 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 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);
- 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 */
- };
- /****************************************************************************
- * 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->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;
- }
- else if (status != 0)
- {
- 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);
- /* PROCFS is read-only. Any attempt to open with any kind of write
- * access is not permitted.
- *
- * REVISIT: Write-able proc files could be quite useful.
- */
- if ((oflags & O_WRONLY) != 0 || (oflags & O_RDONLY) == 0)
- {
- ferr("ERROR: Only O_RDONLY supported\n");
- return -EACCES;
- }
- /* "meminfo" is the only acceptable value for the relpath */
- if (strcmp(relpath, "meminfo") != 0)
- {
- ferr("ERROR: relpath is '%s'\n", relpath);
- return -ENOENT;
- }
- /* Allocate a container to hold the file attributes */
- procfile = (FAR struct meminfo_file_s *)
- 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 = (FAR void *)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;
- struct mallinfo mem;
- 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 = snprintf(procfile->line, MEMINFO_LINELEN,
- " total used free largest\n");
- copysize = procfs_memcpy(procfile->line, linesize, buffer, buflen,
- &offset);
- totalsize = copysize;
- /* Followed by information about the memory resources */
- #ifdef CONFIG_MM_KERNEL_HEAP
- if (totalsize < buflen)
- {
- buffer += copysize;
- buflen -= copysize;
- /* Show kernel heap information */
- #ifdef CONFIG_CAN_PASS_STRUCTS
- mem = kmm_mallinfo();
- #else
- (void)kmm_mallinfo(&mem);
- #endif
- linesize = snprintf(procfile->line, MEMINFO_LINELEN,
- "Kmem: %11lu%11lu%11lu%11lu\n",
- (unsigned long)mem.arena,
- (unsigned long)mem.uordblks,
- (unsigned long)mem.fordblks,
- (unsigned long)mem.mxordblk);
- copysize = procfs_memcpy(procfile->line, linesize, buffer, buflen,
- &offset);
- totalsize += copysize;
- }
- #endif
- #if !defined(CONFIG_BUILD_KERNEL)
- if (totalsize < buflen)
- {
- buffer += copysize;
- buflen -= copysize;
- /* Show user heap information */
- #ifdef CONFIG_CAN_PASS_STRUCTS
- mem = kumm_mallinfo();
- #else
- (void)kumm_mallinfo(&mem);
- #endif
- linesize = snprintf(procfile->line, MEMINFO_LINELEN,
- "Umem: %11lu%11lu%11lu%11lu\n",
- (unsigned long)mem.arena,
- (unsigned long)mem.uordblks,
- (unsigned long)mem.fordblks,
- (unsigned long)mem.mxordblk);
- copysize = procfs_memcpy(procfile->line, linesize, buffer, buflen,
- &offset);
- totalsize += copysize;
- }
- #endif
- #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 = snprintf(procfile->line, MEMINFO_LINELEN,
- "Page: %11lu%11lu%11lu%11lu\n",
- 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 = snprintf(procfile->line, MEMINFO_LINELEN,
- "Prog: %11lu%11lu%11lu%11lu\n",
- (unsigned long)progmem.arena,
- (unsigned long)progmem.uordblks,
- (unsigned long)progmem.fordblks,
- (unsigned long)progmem.mxordblk);
- copysize = procfs_memcpy(procfile->line, linesize, buffer, buflen,
- &offset);
- totalsize += copysize;
- }
- #endif
- /* Update the file offset */
- filep->f_pos += totalsize;
- return totalsize;
- }
- /****************************************************************************
- * 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 only acceptable value for the relpath */
- if (strcmp(relpath, "meminfo") != 0)
- {
- ferr("ERROR: relpath is '%s'\n", relpath);
- return -ENOENT;
- }
- /* "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
- ****************************************************************************/
- #endif /* !CONFIG_FS_PROCFS_EXCLUDE_MEMINFO */
|