sergiotarxz/nuttx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
5a7a118320
nuttx/fs/smartfs/smartfs_procfs.c
Alin Jerpelea 231b8518b7 NuttX: Ken Pettit: update licenses to Apache 
Ken Pettit has submitted the ICLA and we can migrate the licenses
 to Apache.

Sebastien Lorquet has submitted the ICLA and we can migrate the licenses
 to Apache.

Gregory Nutt has submitted the SGA and we can migrate the licenses
 to Apache.

Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
2021-04-10 06:42:19 -05:00

1037 lines
28 KiB
C
Raw Blame History

/****************************************************************************
* fs/smartfs/smartfs_procfs.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/arch.h>
#include <nuttx/sched.h>
#include <nuttx/kmalloc.h>
#include <nuttx/fs/fs.h>
#include <nuttx/fs/procfs.h>
#include <nuttx/fs/dirent.h>
#include <nuttx/fs/ioctl.h>
#include <nuttx/mtd/smart.h>
#include <arch/irq.h>
#include "smartfs.h"
#if defined(CONFIG_FS_PROCFS) && !defined(CONFIG_FS_EXCLUDE_SMARTFS)
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/* This enumeration identifies all of the thread attributes that can be
* accessed via the procfs file system.
*/
/* Level 1 is the directory of attributes */
struct smartfs_level1_s
{
struct procfs_dir_priv_s base; /* Base directory private data */
/* Add context specific data types here for managing the directory
* open / read / stat, etc.
*/
FAR struct smartfs_mountpt_s *mount;
uint8_t direntry;
};
/* This structure describes one open "file" */
struct smartfs_file_s
{
struct procfs_file_s base; /* Base open file structure */
/* Add context specific data types for managing an open file here */
struct smartfs_level1_s level1; /* Reference to item being accessed */
uint16_t offset;
};
struct smartfs_procfs_entry_s
{
const char *name; /* Name of the directory entry */
size_t (*read)(FAR struct file *filep, FAR char *buffer, size_t buflen);
ssize_t (*write)(FAR struct file *filep,
FAR const char *buffer, size_t buflen);
uint8_t type;
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* File system methods */
static int smartfs_open(FAR struct file *filep, FAR const char *relpath,
int oflags, mode_t mode);
static int smartfs_close(FAR struct file *filep);
static ssize_t smartfs_read(FAR struct file *filep, FAR char *buffer,
size_t buflen);
static ssize_t smartfs_write(FAR struct file *filep, FAR const char *buffer,
size_t buflen);
static int smartfs_dup(FAR const struct file *oldp,
FAR struct file *newp);
static int smartfs_opendir(const char *relpath,
FAR struct fs_dirent_s *dir);
static int smartfs_closedir(FAR struct fs_dirent_s *dir);
static int smartfs_readdir(FAR struct fs_dirent_s *dir);
static int smartfs_rewinddir(FAR struct fs_dirent_s *dir);
static int smartfs_stat(FAR const char *relpath, FAR struct stat *buf);
static ssize_t smartfs_debug_write(FAR struct file *filep,
FAR const char *buffer, size_t buflen);
static size_t smartfs_status_read(FAR struct file *filep, FAR char *buffer,
size_t buflen);
#ifdef CONFIG_MTD_SMART_ALLOC_DEBUG
static size_t smartfs_mem_read(FAR struct file *filep, FAR char *buffer,
size_t buflen);
#endif
#ifdef CONFIG_MTD_SMART_SECTOR_ERASE_DEBUG
static size_t smartfs_erasemap_read(FAR struct file *filep,
FAR char *buffer, size_t buflen);
#endif
#ifdef CONFIG_SMARTFS_FILE_SECTOR_DEBUG
static size_t smartfs_files_read(FAR struct file *filep, FAR char *buffer,
size_t buflen);
#endif
/****************************************************************************
* Private Data
****************************************************************************/
static const struct smartfs_procfs_entry_s g_direntry[] =
{
{ "debuglevel", NULL, smartfs_debug_write, DTYPE_FILE },
#ifdef CONFIG_MTD_SMART_SECTOR_ERASE_DEBUG
{ "erasemap", smartfs_erasemap_read, NULL, DTYPE_FILE },
#endif
#ifdef CONFIG_MTD_SMART_ALLOC_DEBUG
{ "mem", smartfs_mem_read, NULL, DTYPE_FILE },
#endif
{ "status", smartfs_status_read, NULL, DTYPE_FILE }
};
static const uint8_t g_direntrycount = sizeof(g_direntry) /
sizeof(struct smartfs_procfs_entry_s);
/****************************************************************************
* Public Data
****************************************************************************/
/* See include/nutts/fs/procfs.h
* We use the old-fashioned kind of initializers so that this will compile
* with any compiler.
*/
const struct procfs_operations smartfs_procfsoperations =
{
smartfs_open, /* open */
smartfs_close, /* close */
smartfs_read, /* read */
/* No write supported */
smartfs_write, /* write */
smartfs_dup, /* dup */
smartfs_opendir, /* opendir */
smartfs_closedir, /* closedir */
smartfs_readdir, /* readdir */
smartfs_rewinddir, /* rewinddir */
smartfs_stat /* stat */
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: smartfs_find_dirref
*
* Description:
* Analyse relpath to find the directory reference entry it represents,
* if any.
*
****************************************************************************/
static int smartfs_find_dirref(FAR const char *relpath,
FAR struct smartfs_level1_s *level1)
{
int ret = -ENOENT;
FAR struct smartfs_mountpt_s *mount;
uint16_t x;
FAR char * str;
mount = smartfs_get_first_mount();
/* Skip the "fs/smartfs" portion of relpath */
if (strncmp(relpath, "fs/smartfs", 10) == 0)
{
relpath += 10;
}
if (relpath[0] == '/')
{
relpath++;
}
/* Now test if doing a full dir listing of fs/smartfs */
if (relpath[0] == '\0')
{
/* Save the mount as the first one to display */
level1->mount = mount;
level1->base.level = 1;
level1->base.nentries = 0;
while (mount != NULL)
{
level1->base.nentries++;
mount = mount->fs_next;
}
level1->base.index = 0;
ret = OK;
}
else
{
/* Search for the requested entry */
str = strchr(relpath, '/');
if (str)
{
x = str - relpath;
}
else
{
x = strlen(relpath);
}
while (mount)
{
if (strncmp(mount->fs_blkdriver->i_name, relpath, x) == 0)
{
/* Found the mount point. Just break */
break;
}
/* Try the next mount */
mount = mount->fs_next;
}
if (mount)
{
/* Save the mount and skip it in the relpath */
ret = OK;
level1->mount = mount;
relpath += strlen(mount->fs_blkdriver->i_name);
if (relpath[0] == '/')
{
relpath++;
}
/* Test if a level 3 directory entry being requested or not */
if (relpath[0] == '\0')
{
/* Requesting directory listing of a specific SMARTFS mount or
* entry
*/
level1->base.level = 2;
level1->base.nentries = g_direntrycount;
level1->base.index = 0;
}
else
{
/* Find the level 3 directory entry */
level1->base.level = 3;
level1->base.nentries = 1;
level1->base.index = 0;
level1->direntry = 0;
while (level1->direntry < g_direntrycount)
{
/* Test if this entry matches */
if (!strcmp(relpath, g_direntry[level1->direntry].name))
{
break;
}
/* Advance to next entry */
level1->direntry++;
}
/* Test if entry found or not */
if (level1->direntry == g_direntrycount)
{
ret = -ENOENT;
}
}
}
}
return ret;
}
/****************************************************************************
* Name: smartfs_open
****************************************************************************/
static int smartfs_open(FAR struct file *filep, FAR const char *relpath,
int oflags, mode_t mode)
{
FAR struct smartfs_file_s *priv;
int ret;
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) &&
(smartfs_procfsoperations.write == NULL))
{
ferr("ERROR: Only O_RDONLY supported\n");
return -EACCES;
}
/* Allocate a container to hold the task and attribute selection */
priv = kmm_malloc(sizeof(struct smartfs_file_s));
if (!priv)
{
ferr("ERROR: Failed to allocate file attributes\n");
return -ENOMEM;
}
/* Find the directory entry being opened */
ret = smartfs_find_dirref(relpath, &priv->level1);
if (ret == -ENOENT)
{
/* Entry not found */
kmm_free(priv);
return ret;
}
priv->offset = 0;
/* Save the index as the open-specific state in filep->f_priv */
filep->f_priv = (FAR void *)priv;
return OK;
}
/****************************************************************************
* Name: smartfs_close
****************************************************************************/
static int smartfs_close(FAR struct file *filep)
{
FAR struct smartfs_file_s *priv;
/* Recover our private data from the struct file instance */
priv = (FAR struct smartfs_file_s *)filep->f_priv;
DEBUGASSERT(priv);
/* Release the file attributes structure */
kmm_free(priv);
filep->f_priv = NULL;
return OK;
}
/****************************************************************************
* Name: smartfs_read
****************************************************************************/
static ssize_t smartfs_read(FAR struct file *filep, FAR char *buffer,
size_t buflen)
{
FAR struct smartfs_file_s *priv;
ssize_t ret;
finfo("buffer=%p buflen=%d\n", buffer, (int)buflen);
/* Recover our private data from the struct file instance */
priv = (FAR struct smartfs_file_s *)filep->f_priv;
DEBUGASSERT(priv);
/* Perform the read based on the directory entry */
ret = 0;
if (priv->level1.base.level == 3)
{
if (priv->level1.direntry < g_direntrycount)
{
if (g_direntry[priv->level1.direntry].read)
{
ret = g_direntry[priv->level1.direntry].read(filep,
buffer, buflen);
}
}
}
/* Update the file offset */
if (ret > 0)
{
filep->f_pos += ret;
}
return ret;
}
/****************************************************************************
* Name: smartfs_write
****************************************************************************/
static ssize_t smartfs_write(FAR struct file *filep, FAR const char *buffer,
size_t buflen)
{
FAR struct smartfs_file_s *priv;
ssize_t ret;
/* Recover our private data from the struct file instance */
priv = (FAR struct smartfs_file_s *)filep->f_priv;
DEBUGASSERT(priv);
/* Perform the write based on the directory entry */
ret = 0;
if (priv->level1.base.level == 3)
{
if (priv->level1.direntry < g_direntrycount)
{
if (g_direntry[priv->level1.direntry].write)
{
ret = g_direntry[priv->level1.direntry].write(filep,
buffer, buflen);
}
}
}
/* Update the file offset */
if (ret > 0)
{
filep->f_pos += ret;
}
return ret;
}
/****************************************************************************
* Name: smartfs_dup
*
* Description:
* Duplicate open file data in the new file structure.
*
****************************************************************************/
static int smartfs_dup(FAR const struct file *oldp, FAR struct file *newp)
{
FAR struct smartfs_file_s *oldpriv;
FAR struct smartfs_file_s *newpriv;
finfo("Dup %p->%p\n", oldp, newp);
/* Recover our private data from the old struct file instance */
oldpriv = (FAR struct smartfs_file_s *)oldp->f_priv;
DEBUGASSERT(oldpriv);
/* Allocate a new container to hold the task and attribute selection */
newpriv = kmm_malloc(sizeof(struct smartfs_file_s));
if (!newpriv)
{
ferr("ERROR: Failed to allocate file attributes\n");
return -ENOMEM;
}
/* The copy the file attribute from the old attributes to the new */
memcpy(newpriv, oldpriv, sizeof(struct smartfs_file_s));
/* Save the new attributes in the new file structure */
newp->f_priv = (FAR void *)newpriv;
return OK;
}
/****************************************************************************
* Name: smartfs_opendir
*
* Description:
* Open a directory for read access
*
****************************************************************************/
static int smartfs_opendir(FAR const char *relpath,
FAR struct fs_dirent_s *dir)
{
FAR struct smartfs_level1_s *level1;
int ret;
finfo("relpath: \"%s\"\n", relpath ? relpath : "NULL");
DEBUGASSERT(relpath && dir && !dir->u.procfs);
/* The path refers to the 1st level subdirectory. Allocate the level1
* dirent structure.
*/
level1 = (FAR struct smartfs_level1_s *)
kmm_malloc(sizeof(struct smartfs_level1_s));
if (!level1)
{
ferr("ERROR: Failed to allocate the level1 directory structure\n");
return -ENOMEM;
}
/* Initialize base structure components */
ret = smartfs_find_dirref(relpath, level1);
if (ret == OK)
{
dir->u.procfs = (FAR void *) level1;
}
else
{
kmm_free(level1);
}
return ret;
}
/****************************************************************************
* Name: smartfs_closedir
*
* Description: Close the directory listing
*
****************************************************************************/
static int smartfs_closedir(FAR struct fs_dirent_s *dir)
{
FAR struct smartfs_level1_s *priv;
DEBUGASSERT(dir && dir->u.procfs);
priv = dir->u.procfs;
if (priv)
{
kmm_free(priv);
}
dir->u.procfs = NULL;
return OK;
}
/****************************************************************************
* Name: smartfs_readdir
*
* Description: Read the next directory entry
*
****************************************************************************/
static int smartfs_readdir(struct fs_dirent_s *dir)
{
FAR struct smartfs_level1_s *level1;
int ret, index;
DEBUGASSERT(dir && dir->u.procfs);
level1 = dir->u.procfs;
/* Have we reached the end of the directory */
index = level1->base.index;
if (index >= level1->base.nentries)
{
/* We signal the end of the directory by returning the special
* error -ENOENT
*/
finfo("Entry %d: End of directory\n", index);
ret = -ENOENT;
}
/* We are traversing a subdirectory of task attributes */
else
{
DEBUGASSERT(level1->base.level >= 1);
/* Test the type of directory listing */
if (level1->base.level == 1)
{
/* Listing the top level (mounted smartfs volumes) */
if (!level1->mount)
{
return -ENOENT;
}
dir->fd_dir.d_type = DTYPE_DIRECTORY;
strncpy(dir->fd_dir.d_name, level1->mount->fs_blkdriver->i_name,
NAME_MAX);
/* Advance to next entry */
level1->base.index++;
level1->mount = level1->mount->fs_next;
}
else if (level1->base.level == 2)
{
/* Listing the contents of a specific mount */
dir->fd_dir.d_type = g_direntry[level1->base.index].type;
strncpy(dir->fd_dir.d_name, g_direntry[level1->base.index++].name,
NAME_MAX);
}
else if (level1->base.level == 3)
{
/* Listing the contents of a specific entry */
dir->fd_dir.d_type = g_direntry[level1->base.index].type;
strncpy(dir->fd_dir.d_name, g_direntry[level1->direntry].name,
NAME_MAX);
level1->base.index++;
}
/* Set up the next directory entry offset. NOTE that we could use the
* standard f_pos instead of our own private index.
*/
ret = OK;
}
return ret;
}
/****************************************************************************
* Name: smartfs_rewindir
*
* Description: Reset directory read to the first entry
*
****************************************************************************/
static int smartfs_rewinddir(struct fs_dirent_s *dir)
{
FAR struct smartfs_level1_s *priv;
DEBUGASSERT(dir && dir->u.procfs);
priv = dir->u.procfs;
priv->base.index = 0;
return OK;
}
/****************************************************************************
* Name: smartfs_stat
*
* Description: Return information about a file or directory
*
****************************************************************************/
static int smartfs_stat(const char *relpath, struct stat *buf)
{
int ret;
struct smartfs_level1_s level1;
/* Decide if the relpath is valid and if it is a file
* or a directory and set it's permissions.
*/
ret = smartfs_find_dirref(relpath, &level1);
buf->st_mode = S_IROTH | S_IRGRP | S_IRUSR;
if (ret == OK)
{
if (level1.base.level < 3)
{
buf->st_mode |= S_IFDIR;
}
else
{
/* The entry being stat'ed is lowest level */
if (g_direntry[level1.direntry].type == DTYPE_DIRECTORY)
{
buf->st_mode |= S_IFDIR;
}
else
{
buf->st_mode |= S_IFREG;
}
/* Test if the entry is writable */
if (g_direntry[level1.direntry].write != NULL)
{
buf->st_mode |= S_IWOTH | S_IWGRP | S_IWUSR;
}
}
}
/* File/directory size, access block size */
buf->st_size = 0;
buf->st_blksize = 0;
buf->st_blocks = 0;
return ret;
}
/****************************************************************************
* Name: smartfs_debug_write
*
* Description: Performs the write operation for the "debug" file
*
****************************************************************************/
static ssize_t smartfs_debug_write(FAR struct file *filep,
FAR const char *buffer, size_t buflen)
{
struct mtd_smart_debug_data_s debug_data;
FAR struct smartfs_file_s *priv;
priv = (FAR struct smartfs_file_s *) filep->f_priv;
/* Populate the debug_data structure */
debug_data.debugcmd = SMART_DEBUG_CMD_SET_DEBUG_LEVEL;
debug_data.debugdata = atoi(buffer);
priv->level1.mount->fs_blkdriver->u.i_bops->ioctl(
priv->level1.mount->fs_blkdriver, BIOC_DEBUGCMD,
(unsigned long) &debug_data);
return buflen;
}
/****************************************************************************
* Name: smartfs_status_read
*
* Description: Performs the read operation for the "status" dir entry.
*
****************************************************************************/
static size_t smartfs_status_read(FAR struct file *filep, FAR char *buffer,
size_t buflen)
{
struct mtd_smart_procfs_data_s procfs_data;
FAR struct smartfs_file_s *priv;
int ret;
size_t len;
int utilization;
priv = (FAR struct smartfs_file_s *) filep->f_priv;
/* Initialize the read length to zero and test if we are at the
* end of the file (i.e. already read the data.
*/
len = 0;
if (priv->offset == 0)
{
/* Get the ProcFS data from the block driver */
ret = priv->level1.mount->fs_blkdriver->u.i_bops->ioctl(
priv->level1.mount->fs_blkdriver, BIOC_GETPROCFSD,
(unsigned long) &procfs_data);
if (ret == OK)
{
/* Calculate the sector utilization percentage */
if (procfs_data.blockerases == 0)
{
utilization = 100;
}
else
{
utilization = 100 * (procfs_data.blockerases *
procfs_data.sectorsperblk -
procfs_data.unusedsectors) /
(procfs_data.blockerases *
procfs_data.sectorsperblk);
}
/* Format and return data in the buffer */
len = snprintf(buffer, buflen,
"Format version: %d\nName Len: %d\n"
"Total Sectors: %d\nSector Size: %d\n"
"Format Sector: %d\nDir Sector: %d\n"
"Free Sectors: %d\nReleased Sectors: %d\n"
"Unused Sectors: %" PRIu32 "\n"
"Block Erases: %" PRIu32 "\n"
"Sectors Per Block: %d\nSector Utilization:%d%%\n"
#ifdef CONFIG_MTD_SMART_WEAR_LEVEL
"Uneven Wear Count: %" PRIu32 "\n"
#endif
,
procfs_data.formatversion, procfs_data.namelen,
procfs_data.totalsectors, procfs_data.sectorsize,
procfs_data.formatsector, procfs_data.dirsector,
procfs_data.freesectors, procfs_data.releasesectors,
procfs_data.unusedsectors, procfs_data.blockerases,
procfs_data.sectorsperblk, utilization
#ifdef CONFIG_MTD_SMART_WEAR_LEVEL
, procfs_data.uneven_wearcount
#endif
);
}
/* Indicate we have already provided all the data */
priv->offset = 0xff;
}
return len;
}
/****************************************************************************
* Name: smartfs_mem_read
*
* Description: Performs the read operation for the "mem" dir entry.
*
****************************************************************************/
#ifdef CONFIG_MTD_SMART_ALLOC_DEBUG
static size_t smartfs_mem_read(FAR struct file *filep, FAR char *buffer,
size_t buflen)
{
struct mtd_smart_procfs_data_s procfs_data;
FAR struct smartfs_file_s *priv;
int ret;
uint16_t x;
size_t len, total;
priv = (FAR struct smartfs_file_s *) filep->f_priv;
/* Initialize the read length to zero and test if we are at the
* end of the file (i.e. already read the data.
*/
len = 0;
if (priv->offset == 0)
{
/* Get the ProcFS data from the block driver */
ret = priv->level1.mount->fs_blkdriver->u.i_bops->ioctl(
priv->level1.mount->fs_blkdriver, BIOC_GETPROCFSD,
(unsigned long) &procfs_data);
if (ret == OK)
{
/* Print the allocations to the buffer */
total = 0;
len = snprintf(buffer, buflen, "Allocations:\n");
buflen -= len;
for (x = 0; x < procfs_data.alloccount; x++)
{
/* Only print allocations with a non-NULL pointer */
if (procfs_data.allocs[x].ptr != NULL)
{
len += snprintf(&buffer[len], buflen - len, " %s: %d\n",
procfs_data.allocs[x].name, procfs_data.allocs[x].size);
total += procfs_data.allocs[x].size;
}
}
/* Add the total allocation amount to the buffer */
len += snprintf(&buffer[len], buflen - len,
"\nTotal: %d\n", total);
}
/* Indicate we have done the read */
priv->offset = 0xff;
}
return len;
}
#endif
/****************************************************************************
* Name: smartfs_erasemap_read
*
* Description: Performs the read operation for the "erase" dir entry.
*
****************************************************************************/
#ifdef CONFIG_MTD_SMART_SECTOR_ERASE_DEBUG
static size_t smartfs_erasemap_read(FAR struct file *filep,
FAR char *buffer, size_t buflen)
{
struct mtd_smart_procfs_data_s procfs_data;
FAR struct smartfs_file_s *priv;
int ret, rows, cols;
size_t x, y;
size_t len, copylen;
priv = (FAR struct smartfs_file_s *) filep->f_priv;
/* Get the ProcFS data from the block driver */
ret = priv->level1.mount->fs_blkdriver->u.i_bops->ioctl(
priv->level1.mount->fs_blkdriver, BIOC_GETPROCFSD,
(unsigned long) &procfs_data);
if (ret != OK)
{
return 0;
}
/* Initialize the read length to zero and test if we are at the
* end of the file (i.e. already read the data).
*/
len = 0;
rows = 32;
cols = procfs_data.neraseblocks / rows;
while (rows >= 4 && (cols < 64 || cols > 128))
{
rows >>= 1;
cols = procfs_data.neraseblocks / rows;
}
/* Continue sending data until everything sent. We add 'rows' below to
* account for the \n at the end of each line.
*/
if (priv->offset < procfs_data.neraseblocks + rows)
{
/* copylen keeps track of the current length. When it is
* equal to or greater than the offset, we start sending data
* again. Basically we are starting at the beginning each time
* and only sending where we left off and discarding the rest.
*/
copylen = 0;
for (y = 0; y < rows; y++)
{
for (x = 0; x < cols; x++)
{
/* Copy data to the buffer */
if (copylen >= priv->offset)
{
buffer[len++] =
procfs_data.erasecounts[y * cols + x] + 'A';
priv->offset++;
if (len >= buflen)
{
return len;
}
}
copylen++;
}
/* Add a trailing \n */
if (copylen >= priv->offset)
{
buffer[len++] = '\n';
priv->offset++;
if (len >= buflen)
{
return len;
}
}
/* Terminate the string */
if (copylen >= priv->offset)
{
buffer[len++] = '\0';
priv->offset++;
}
copylen++;
}
}
return len;
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
#endif /* CONFIG_FS_PROCFS && !CONFIG_FS_PROCFS_EXCLUDE_SMARTFS */
Reference in New Issue View Git Blame Copy Permalink