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#include <linux/module.h>
#include <linux/slab.h>
#include <linux/debugfs.h>
#include "ged_base.h"
#include "ged_debugFS.h"
#define GED_DEBUGFS_DIR_NAME "ged"
static struct dentry *gpsDebugFSEntryDir = NULL;
typedef struct _GED_DEBUGFS_PRIV_DATA_
{
struct seq_operations* psReadOps;
GED_ENTRY_WRITE_FUNC* pfnWrite;
void* pvData;
} GED_DEBUGFS_PRIV_DATA;
//-----------------------------------------------------------------------------
static GED_ERROR ged_debugFS_open(struct inode *psINode, struct file *psFile)
{
GED_DEBUGFS_PRIV_DATA *psPrivData = (GED_DEBUGFS_PRIV_DATA *)psINode->i_private;
int iResult;
iResult = seq_open(psFile, psPrivData->psReadOps);
if (iResult == 0)
{
struct seq_file *psSeqFile = psFile->private_data;
psSeqFile->private = psPrivData->pvData;
return GED_OK;
}
return GED_ERROR_FAIL;
}
//-----------------------------------------------------------------------------
static ssize_t ged_debugFS_write(
struct file* psFile,
const char __user* pszBuffer,
size_t uiCount,
loff_t* puiPosition)
{
struct inode *psINode = psFile->f_path.dentry->d_inode;
GED_DEBUGFS_PRIV_DATA *psPrivData = (GED_DEBUGFS_PRIV_DATA *)psINode->i_private;
if (psPrivData->pfnWrite == NULL)
{
return -EIO;
}
return psPrivData->pfnWrite(pszBuffer, uiCount, *puiPosition, psPrivData->pvData);
}
//-----------------------------------------------------------------------------
static const struct file_operations gsGEDDebugFSFileOps =
{
.owner = THIS_MODULE,
.open = ged_debugFS_open,
.read = seq_read,
.write = ged_debugFS_write,
.llseek = seq_lseek,
.release = seq_release,
};
//-----------------------------------------------------------------------------
GED_ERROR ged_debugFS_create_entry(
const char* pszName,
void* pvDir,
struct seq_operations* psReadOps,
GED_ENTRY_WRITE_FUNC* pfnWrite,
void* pvData,
struct dentry** ppsEntry)
{
GED_DEBUGFS_PRIV_DATA* psPrivData;
struct dentry* psEntry;
umode_t uiMode;
//assert(gpkDebugFSEntryDir != NULL);
psPrivData = ged_alloc(sizeof(GED_DEBUGFS_PRIV_DATA));
if (psPrivData == NULL)
{
return GED_ERROR_OOM;
}
psPrivData->psReadOps = psReadOps;
psPrivData->pfnWrite = pfnWrite;
psPrivData->pvData = pvData;
uiMode = S_IFREG;
if (psReadOps != NULL)
{
uiMode |= S_IRUGO;
}
if (pfnWrite != NULL)
{
uiMode |= S_IWUSR;
}
psEntry = debugfs_create_file(pszName,
uiMode,
(pvDir != NULL) ? (struct dentry *)pvDir : gpsDebugFSEntryDir,
psPrivData,
&gsGEDDebugFSFileOps);
if (IS_ERR(psEntry))
{
GED_LOGE("Failed to create '%s' debugfs entry\n", pszName);
return GED_ERROR_FAIL;
}
*ppsEntry = psEntry;
return GED_OK;
}
//-----------------------------------------------------------------------------
void ged_debugFS_remove_entry(struct dentry *psEntry)
{
if (psEntry->d_inode->i_private != NULL)
{
ged_free(psEntry->d_inode->i_private, sizeof(GED_DEBUGFS_PRIV_DATA));
}
debugfs_remove(psEntry);
}
//-----------------------------------------------------------------------------
GED_ERROR ged_debugFS_create_entry_dir(
const char* pszName,
struct dentry* psParentDir,
struct dentry** ppsDir)
{
struct dentry *psDir;
if (pszName == NULL || ppsDir == NULL)
{
return GED_ERROR_INVALID_PARAMS;
}
psDir = debugfs_create_dir(pszName, (psParentDir) ? psParentDir : gpsDebugFSEntryDir);
if (psDir == NULL)
{
GED_LOGE("Failed to create '%s' debugfs directory\n", pszName);
return GED_ERROR_OOM;
}
*ppsDir = psDir;
return GED_OK;
}
//-----------------------------------------------------------------------------
void ged_debugFS_remove_entry_dir(struct dentry *psDir)
{
debugfs_remove(psDir);
}
//-----------------------------------------------------------------------------
GED_ERROR ged_debugFS_init(void)
{
//assert(gpkDebugFSEntryDir == NULL);
gpsDebugFSEntryDir = debugfs_create_dir(GED_DEBUGFS_DIR_NAME, NULL);
if (gpsDebugFSEntryDir == NULL)
{
GED_LOGE("Failed to create '%s' debugfs root directory\n", GED_DEBUGFS_DIR_NAME);
return GED_ERROR_OOM;
}
return GED_OK;
}
//-----------------------------------------------------------------------------
void ged_debugFS_exit(void)
{
//assert(gpkDebugFSEntryDir != NULL);
debugfs_remove(gpsDebugFSEntryDir);
gpsDebugFSEntryDir = NULL;
}
//-----------------------------------------------------------------------------
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