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procfs: Add procfs_register_meminfo 

This allows subsystems to register their mallinfo-like functions
to be shown in /proc/meminfo.
This commit is contained in:
YAMAMOTO Takashi 2021-02-12 13:50:12 +09:00 committed by David Sidrane
parent f56ff40101
commit f305cefe82
2 changed files with 70 additions and 0 deletions
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46
fs/procfs/fs_procfsmeminfo.c
View File

@ -122,6 +122,8 @@ const struct procfs_operations meminfo_operations =
meminfo_stat /* stat */
};
FAR struct procfs_meminfo_entry_s *g_procfs_meminfo = NULL;
/****************************************************************************
* Private Functions
****************************************************************************/
@ -291,6 +293,33 @@ static ssize_t meminfo_read(FAR struct file *filep, FAR char *buffer,
/* 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 */
entry->mallinfo(entry->user_data, &minfo);
linesize = snprintf(procfile->line, MEMINFO_LINELEN,
"%4s: %11lu%11lu%11lu%11lu\n",
entry->name,
(unsigned long)minfo.arena,
(unsigned long)minfo.uordblks,
(unsigned long)minfo.fordblks,
(unsigned long)minfo.mxordblk);
copysize = procfs_memcpy(procfile->line, linesize, buffer,
buflen, &offset);
totalsize += copysize;
}
}
#ifdef CONFIG_MM_KERNEL_HEAP
if (totalsize < buflen)
{
@ -462,4 +491,21 @@ static int meminfo_stat(FAR const char *relpath, FAR struct stat *buf)
* 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 */

24
include/nuttx/fs/procfs.h
View File

@ -140,6 +140,17 @@ struct procfs_dir_priv_s
FAR const struct procfs_entry_s *procfsentry; /* Pointer to procfs handler entry */
};
/* An entry for procfs_register_meminfo */
struct procfs_meminfo_entry_s
{
FAR const char *name;
CODE void (*mallinfo)(FAR void *user_data, FAR struct mallinfo *);
FAR void *user_data;
struct procfs_meminfo_entry_s *next;
};
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
@ -220,6 +231,19 @@ size_t procfs_memcpy(FAR const char *src, size_t srclen,
int procfs_register(FAR const struct procfs_entry_s *entry);
#endif
/****************************************************************************
* 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);
#undef EXTERN
#ifdef __cplusplus
}