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nuttx/fs/spiffs/src/spiffs_vfs.c
yinshengkai 9852428953 fs: procfs add poll support 
Signed-off-by: yinshengkai <yinshengkai@xiaomi.com>
2023-12-26 19:23:13 -08:00

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/****************************************************************************
* fs/spiffs/src/spiffs_vfs.c
* Interface between SPIFFS and the NuttX VFS
*
* Copyright (C) 2018 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Includes logic taken from 0.3.7 of SPIFFS by Peter Andersion. That
* version was originally released under the MIT license.
*
* Copyright (c) 2013-2017 Peter Andersson (pelleplutt1976@gmail.com)
*
* 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/stat.h>
#include <sys/statfs.h>
#include <stdint.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <assert.h>
#include <debug.h>
#include <inttypes.h>
#include <nuttx/kmalloc.h>
#include <nuttx/queue.h>
#include <nuttx/fs/fs.h>
#include <nuttx/fs/ioctl.h>
#include "spiffs.h"
#include "spiffs_core.h"
#include "spiffs_cache.h"
#include "spiffs_gc.h"
#include "spiffs_check.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define spiffs_lock_volume(fs) (nxrmutex_lock(&fs->lock))
#define spiffs_unlock_volume(fs) (nxrmutex_unlock(&fs->lock))
/****************************************************************************
* Private Types
****************************************************************************/
struct spiffs_dir_s
{
struct fs_dirent_s base;
int16_t block;
int entry;
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* File system operations */
static int spiffs_open(FAR struct file *filep, FAR const char *relpath,
int oflags, mode_t mode);
static int spiffs_close(FAR struct file *filep);
static ssize_t spiffs_read(FAR struct file *filep, FAR char *buffer,
size_t buflen);
static ssize_t spiffs_write(FAR struct file *filep, FAR const char *buffer,
size_t buflen);
static off_t spiffs_seek(FAR struct file *filep, off_t offset, int whence);
static int spiffs_ioctl(FAR struct file *filep, int cmd, unsigned long arg);
static int spiffs_sync(FAR struct file *filep);
static int spiffs_dup(FAR const struct file *oldp, FAR struct file *newp);
static int spiffs_fstat(FAR const struct file *filep, FAR struct stat *buf);
static int spiffs_truncate(FAR struct file *filep, off_t length);
static int spiffs_opendir(FAR struct inode *mountpt,
FAR const char *relpath, FAR struct fs_dirent_s **dir);
static int spiffs_closedir(FAR struct inode *mountpt,
FAR struct fs_dirent_s *dir);
static int spiffs_readdir(FAR struct inode *mountpt,
FAR struct fs_dirent_s *dir,
FAR struct dirent *dentry);
static int spiffs_rewinddir(FAR struct inode *mountpt,
FAR struct fs_dirent_s *dir);
static int spiffs_bind(FAR struct inode *mtdinode, FAR const void *data,
FAR void **handle);
static int spiffs_unbind(FAR void *handle, FAR struct inode **mtdinode,
unsigned int flags);
static int spiffs_statfs(FAR struct inode *mountpt, FAR struct statfs *buf);
static int spiffs_unlink(FAR struct inode *mountpt,
FAR const char *relpath);
static int spiffs_mkdir(FAR struct inode *mountpt, FAR const char *relpath,
mode_t mode);
static int spiffs_rmdir(FAR struct inode *mountpt, FAR const char *relpath);
static int spiffs_rename(FAR struct inode *mountpt,
FAR const char *oldrelpath, FAR const char *newrelpath);
static int spiffs_stat(FAR struct inode *mountpt, FAR const char *relpath,
FAR struct stat *buf);
/****************************************************************************
* Public Data
****************************************************************************/
const struct mountpt_operations g_spiffs_operations =
{
spiffs_open, /* open */
spiffs_close, /* close */
spiffs_read, /* read */
spiffs_write, /* write */
spiffs_seek, /* seek */
spiffs_ioctl, /* ioctl */
NULL, /* mmap */
spiffs_truncate, /* truncate */
NULL, /* poll */
spiffs_sync, /* sync */
spiffs_dup, /* dup */
spiffs_fstat, /* fstat */
NULL, /* fchstat */
spiffs_opendir, /* opendir */
spiffs_closedir, /* closedir */
spiffs_readdir, /* readdir */
spiffs_rewinddir, /* rewinddir */
spiffs_bind, /* bind */
spiffs_unbind, /* unbind */
spiffs_statfs, /* statfs */
spiffs_unlink, /* unlink */
spiffs_mkdir, /* mkdir */
spiffs_rmdir, /* rmdir */
spiffs_rename, /* rename */
spiffs_stat, /* stat */
NULL /* chstat */
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: spiffs_map_errno
****************************************************************************/
static inline int spiffs_map_errno(int errcode)
{
/* Don't return any or our internal error codes to the application */
return errcode < SPIFFS_ERR_INTERNAL ? -EFTYPE : errcode;
}
/****************************************************************************
* Name: spiffs_consistency_check
****************************************************************************/
static int spiffs_consistency_check(FAR struct spiffs_s *fs)
{
int status;
int ret = OK;
status = spiffs_check_luconsistency(fs);
if (status < 0)
{
fwarn("WARNING: spiffs_check_luconsistency failed: %d\n", status);
if (ret >= 0)
{
ret = status;
}
}
status = spiffs_check_objidconsistency(fs);
if (status < 0)
{
fwarn("WARNING: spiffs_check_objidconsistency failed: %d\n", status);
if (ret >= 0)
{
ret = status;
}
}
status = spiffs_check_pgconsistency(fs);
if (status < 0)
{
fwarn("WARNING: spiffs_check_pgconsistency failed: %d\n", status);
if (ret >= 0)
{
ret = status;
}
}
status = spiffs_objlu_scan(fs);
if (status < 0)
{
fwarn("WARNING: spiffs_objlu_scan failed: %d\n", status);
if (ret >= 0)
{
ret = status;
}
}
return spiffs_map_errno(ret);
}
/****************************************************************************
* Name: spiffs_readdir_callback
****************************************************************************/
static int spiffs_readdir_callback(FAR struct spiffs_s *fs,
int16_t objid, int16_t blkndx, int entry,
FAR const void *user_const,
FAR void *user_var)
{
struct spiffs_pgobj_ndxheader_s objhdr;
int16_t pgndx;
int ret;
if (objid == SPIFFS_OBJID_FREE || objid == SPIFFS_OBJID_DELETED ||
(objid & SPIFFS_OBJID_NDXFLAG) == 0)
{
return SPIFFS_VIS_COUNTINUE;
}
pgndx = SPIFFS_OBJ_LOOKUP_ENTRY_TO_PGNDX(fs, blkndx, entry);
ret = spiffs_cache_read(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
0, SPIFFS_PAGE_TO_PADDR(fs, pgndx),
sizeof(struct spiffs_pgobj_ndxheader_s),
(FAR uint8_t *) & objhdr);
if (ret < 0)
{
ferr("ERROR: spiffs_cache_read failed: %d\n", ret);
return spiffs_map_errno(ret);
}
if ((objid & SPIFFS_OBJID_NDXFLAG) &&
objhdr.phdr.spndx == 0 &&
(objhdr.phdr.flags & (SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_FINAL |
SPIFFS_PH_FLAG_NDXDELE)) ==
(SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_NDXDELE))
{
FAR struct dirent *entryp = user_var;
#ifdef CONFIG_SPIFFS_LEADING_SLASH
/* Skip the leading '/'. */
if (objhdr.name[0] != '/')
{
return -EINVAL; /* The filesystem is corrupted */
}
#endif
strlcpy(entryp->d_name,
(FAR char *)objhdr.name + SPIFFS_LEADING_SLASH_SIZE,
sizeof(entryp->d_name));
entryp->d_type = objhdr.type;
return OK;
}
return SPIFFS_VIS_COUNTINUE;
}
/****************************************************************************
* Name: spiffs_open
****************************************************************************/
static int spiffs_open(FAR struct file *filep, FAR const char *relpath,
int oflags, mode_t mode)
{
FAR struct inode *inode;
FAR struct spiffs_s *fs;
FAR struct spiffs_file_s *fobj;
off_t offset;
int16_t pgndx;
int ret;
finfo("relpath=%s oflags; %04x\n", relpath, oflags);
DEBUGASSERT(filep->f_priv == NULL);
/* Get the mountpoint inode reference from the file structure and the
* mountpoint private data from the inode structure
*/
inode = filep->f_inode;
fs = inode->i_private;
DEBUGASSERT(fs != NULL);
/* Skip over any leading directory separators (shouldn't be any) */
for (; *relpath == '/'; relpath++)
{
}
/* Check the length of the relative path */
if (strlen(relpath) > CONFIG_SPIFFS_NAME_MAX - 1)
{
return -ENAMETOOLONG;
}
/* Allocate a new file object with a reference count of one. */
fobj = (FAR struct spiffs_file_s *)
kmm_zalloc(sizeof(struct spiffs_file_s));
if (fobj == NULL)
{
ferr("ERROR: Failed to allocate fail object\n");
return -ENOMEM;
}
fobj->crefs = 1;
fobj->oflags = oflags;
/* Get exclusive access to the file system */
ret = spiffs_lock_volume(fs);
if (ret < 0)
{
kmm_free(fobj);
return ret;
}
/* Check of the file object already exists */
ret = spiffs_find_objhdr_pgndx(fs, (FAR const uint8_t *)relpath, &pgndx);
if (ret < 0 && (oflags & O_CREAT) == 0)
{
/* It does not exist and we were not asked to create it */
fwarn("WARNING: File does not exist and O_CREAT not set\n");
goto errout_with_fileobject;
}
else if (ret >= 0 && (oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
{
/* O_CREAT and O_EXCL and file exists - fail */
fwarn("WARNING: File exists and O_CREAT|O_EXCL is selected\n");
ret = -EEXIST;
goto errout_with_fileobject;
}
else if ((oflags & O_CREAT) != 0 && ret == -ENOENT)
{
int16_t objid;
/* The file does not exist. We need to create the it. */
ret = spiffs_objlu_find_free_objid(fs, &objid, 0);
if (ret < 0)
{
ferr("ERROR: spiffs_objlu_find_free_objid() failed: %d\n", ret);
goto errout_with_fileobject;
}
ret = spiffs_fobj_create(fs, objid, (FAR const uint8_t *)relpath,
DTYPE_FILE, &pgndx);
if (ret < 0)
{
ferr("ERROR: spiffs_fobj_create() failed: %d\n", ret);
goto errout_with_fileobject;
}
/* Since we created the file, we don't need to truncate it */
oflags &= ~O_TRUNC;
}
else if (ret < 0)
{
ferr("ERROR: spiffs_find_objhdr_pgndx() failed: %d\n", ret);
goto errout_with_fileobject;
}
/* Open the file */
ret = spiffs_fobj_open_bypage(fs, pgndx, fobj);
if (ret < 0)
{
ferr("ERROR: spiffs_fobj_open_bypage() failed: %d\n", ret);
goto errout_with_fileobject;
}
/* Truncate the file to zero length */
if ((oflags & O_TRUNC) != 0)
{
ret = spiffs_fobj_truncate(fs, fobj, 0, false);
if (ret < 0)
{
ferr("ERROR: spiffs_fobj_truncate() failed: %d\n", ret);
goto errout_with_fileobject;
}
}
/* Save the struct spiffs_file_s instance as the file private data */
filep->f_priv = fobj;
/* In write/append mode, we need to set the file pointer to the end of the
* file.
*/
offset = 0;
if ((oflags & (O_APPEND | O_WROK)) == (O_APPEND | O_WROK))
{
offset = fobj->size == SPIFFS_UNDEFINED_LEN ? 0 : fobj->size;
}
/* Save the file position */
filep->f_pos = offset;
/* Add the new file object to the tail of the open file list */
finfo("Adding fobj for objid=%04x\n", fobj->objid);
dq_addlast((FAR dq_entry_t *)fobj, &fs->objq);
spiffs_unlock_volume(fs);
return OK;
errout_with_fileobject:
kmm_free(fobj);
spiffs_unlock_volume(fs);
return spiffs_map_errno(ret);
}
/****************************************************************************
* Name: spiffs_close
****************************************************************************/
static int spiffs_close(FAR struct file *filep)
{
FAR struct inode *inode;
FAR struct spiffs_s *fs;
FAR struct spiffs_file_s *fobj;
int ret;
finfo("filep=%p\n", filep);
DEBUGASSERT(filep->f_priv != NULL);
/* Get the mountpoint inode reference from the file structure and the
* volume state data from the inode structure
*/
inode = filep->f_inode;
fs = inode->i_private;
DEBUGASSERT(fs != NULL);
/* Recover our private data from the struct file instance */
fobj = filep->f_priv;
/* Get exclusive access to the file system */
ret = spiffs_lock_volume(fs);
if (ret < 0)
{
return ret;
}
/* Decrement the reference count on the file */
DEBUGASSERT(fobj->crefs > 0);
if (fobj->crefs > 0)
{
fobj->crefs--;
}
filep->f_priv = NULL;
/* If the reference count decremented to zero then free resources related
* to the open file.
*/
if (fobj->crefs == 0)
{
ssize_t nflushed;
/* Flush any cached writes for the file object being closed.
* This could result in an ENOSPC error being reported if the
* cache could not flushed to FALSH (and the file will appear to
* to have been truncated).
*/
nflushed = spiffs_fobj_flush(fs, fobj);
if (nflushed < 0)
{
ferr("ERROR: spiffs_fobj_flush() failed: %d\n", ret);
ret = (int)nflushed;
}
/* Free the file object while we hold the lock? Weird but this
* should be safe because the object is does not have any other
* references.
*
* If the file was unlinked while it was opened, then now would be
* the time to perform the unlink operation.
*/
spiffs_fobj_free(fs, fobj, (fobj->flags & SFO_FLAG_UNLINKED) != 0);
}
/* Release the lock on the file system */
spiffs_unlock_volume(fs);
return ret;
}
/****************************************************************************
* Name: spiffs_read
****************************************************************************/
static ssize_t spiffs_read(FAR struct file *filep, FAR char *buffer,
size_t buflen)
{
FAR struct inode *inode;
FAR struct spiffs_s *fs;
FAR struct spiffs_file_s *fobj;
ssize_t nread;
int ret;
finfo("filep=%p buffer=%p buflen=%lu\n",
filep, buffer, (unsigned long)buflen);
DEBUGASSERT(filep->f_priv != NULL);
/* Get the mountpoint inode reference from the file structure and the
* volume state data from the inode structure
*/
inode = filep->f_inode;
fs = inode->i_private;
DEBUGASSERT(fs != NULL);
/* Recover the file object state from the struct file instance */
fobj = filep->f_priv;
/* Get exclusive access to the file system */
ret = spiffs_lock_volume(fs);
if (ret < 0)
{
return (ssize_t)ret;
}
/* Read from FLASH */
nread = spiffs_fobj_read(fs, fobj, buffer, buflen, filep->f_pos);
if (nread > 0)
{
filep->f_pos += nread;
}
/* Release the lock on the file system */
spiffs_unlock_volume(fs);
return nread;
}
/****************************************************************************
* Name: spiffs_write
****************************************************************************/
static ssize_t spiffs_write(FAR struct file *filep, FAR const char *buffer,
size_t buflen)
{
FAR struct inode *inode;
FAR struct spiffs_s *fs;
FAR struct spiffs_file_s *fobj;
ssize_t nwritten;
off_t offset;
int ret;
finfo("filep=%p buffer=%p buflen=%zu\n",
filep, buffer, buflen);
DEBUGASSERT(filep->f_priv != NULL);
/* Get the mountpoint inode reference from the file structure and the
* volume state data from the inode structure
*/
inode = filep->f_inode;
fs = inode->i_private;
DEBUGASSERT(fs != NULL);
/* Recover the file object state from the struct file instance */
fobj = filep->f_priv;
/* Get exclusive access to the file system */
ret = spiffs_lock_volume(fs);
if (ret < 0)
{
return (ssize_t)ret;
}
/* Verify that the file was opened with write access */
if ((fobj->oflags & O_WROK) == 0)
{
ret = -EACCES;
goto errout_with_lock;
}
/* Write to FLASH (or cache) */
offset = filep->f_pos;
if (fobj->cache_page == 0)
{
/* See if object ID is associated with cache already */
fobj->cache_page = spiffs_cache_page_get_byobjid(fs, fobj);
}
if ((fobj->oflags & O_DIRECT) == 0)
{
if (buflen < (size_t)SPIFFS_GEO_PAGE_SIZE(fs))
{
/* Small write, try to cache it */
bool alloc_cpage = true;
if (fobj->cache_page != NULL)
{
/* We have a cached page for this object already, check cache
* page boundaries
*/
if (offset < fobj->cache_page->offset ||
offset > fobj->cache_page->offset +
fobj->cache_page->size ||
offset + buflen > fobj->cache_page->offset +
SPIFFS_GEO_PAGE_SIZE(fs))
{
/* Boundary violation, write back cache first and allocate
* new
*/
spiffs_cacheinfo("Cache page=%d for fobj ID=%d "
"Boundary violation, offset=%" PRIu32 " size=%d\n",
fobj->cache_page->cpndx, fobj->objid,
fobj->cache_page->offset,
fobj->cache_page->size);
nwritten =
spiffs_fobj_write(fs, fobj,
spiffs_get_cache_page(fs,
spiffs_get_cache(fs),
fobj->cache_page->cpndx),
fobj->cache_page->offset,
fobj->cache_page->size);
spiffs_cache_page_release(fs, fobj->cache_page);
if (nwritten < 0)
{
ret = (int)nwritten;
goto errout_with_lock;
}
}
else
{
/* Writing within cache */
alloc_cpage = false;
}
}
if (alloc_cpage)
{
fobj->cache_page =
spiffs_cache_page_allocate_byobjid(fs, fobj);
if (fobj->cache_page)
{
fobj->cache_page->offset = offset;
fobj->cache_page->size = 0;
spiffs_cacheinfo("Allocated cache page %d for fobj %d\n",
fobj->cache_page->cpndx, fobj->objid);
}
}
if (fobj->cache_page)
{
FAR struct spiffs_cache_s *cache;
FAR uint8_t *cpage_data;
off_t offset_in_cpage;
offset_in_cpage = offset - fobj->cache_page->offset;
spiffs_cacheinfo("Storing to cache page %d for fobj %d "
"offset=%jd:%jd buflen=%zu\n",
fobj->cache_page->cpndx, fobj->objid,
(intmax_t)offset,
(intmax_t)offset_in_cpage, buflen);
cache = spiffs_get_cache(fs);
cpage_data = spiffs_get_cache_page(fs, cache,
fobj->cache_page->cpndx);
memcpy(&cpage_data[offset_in_cpage], buffer, buflen);
fobj->cache_page->size = MAX(fobj->cache_page->size,
offset_in_cpage + buflen);
nwritten = buflen;
goto success_with_lock;
}
else
{
nwritten = spiffs_fobj_write(fs, fobj, buffer, offset, buflen);
if (nwritten < 0)
{
ret = (int)nwritten;
goto errout_with_lock;
}
goto success_with_lock;
}
}
else
{
/* Big write, no need to cache it - but first check if there is a
* cached write already
*/
if (fobj->cache_page)
{
/* Write back cache first */
spiffs_cacheinfo("Cache page=%d for fobj ID=%d "
"Boundary violation, offset=%" PRIu32 " size=%d\n",
fobj->cache_page->cpndx, fobj->objid,
fobj->cache_page->offset,
fobj->cache_page->size);
nwritten =
spiffs_fobj_write(fs, fobj,
spiffs_get_cache_page(fs,
spiffs_get_cache(fs),
fobj->cache_page->cpndx),
fobj->cache_page->offset,
fobj->cache_page->size);
spiffs_cache_page_release(fs, fobj->cache_page);
if (nwritten < 0)
{
ret = (int)nwritten;
goto errout_with_lock;
}
/* Data written below */
}
}
}
nwritten = spiffs_fobj_write(fs, fobj, buffer, offset, buflen);
if (nwritten < 0)
{
ret = (int)nwritten;
goto errout_with_lock;
}
success_with_lock:
/* Update the file position */
filep->f_pos += nwritten;
/* Release our access to the volume */
spiffs_unlock_volume(fs);
return nwritten;
errout_with_lock:
spiffs_unlock_volume(fs);
return (ssize_t)ret;
}
/****************************************************************************
* Name: spiffs_seek
****************************************************************************/
static off_t spiffs_seek(FAR struct file *filep, off_t offset, int whence)
{
FAR struct inode *inode;
FAR struct spiffs_s *fs;
FAR struct spiffs_file_s *fobj;
ssize_t nflushed;
int16_t data_spndx;
int16_t objndx_spndx;
off_t fsize;
off_t pos;
int ret;
finfo("filep=%p offset=%ld whence=%d\n", filep, (long)offset, whence);
DEBUGASSERT(filep->f_priv != NULL);
/* Get the mountpoint inode reference from the file structure and the
* volume state data from the inode structure
*/
inode = filep->f_inode;
fs = inode->i_private;
DEBUGASSERT(fs != NULL);
/* Recover the file object state from the struct file instance */
fobj = filep->f_priv;
/* Get exclusive access to the file system */
ret = spiffs_lock_volume(fs);
if (ret < 0)
{
return (off_t)ret;
}
/* Get the new file offset */
nflushed = spiffs_fobj_flush(fs, fobj);
if (nflushed < 0)
{
ferr("ERROR: spiffs_fobj_flush() failed: %d\n", ret);
}
fsize = fobj->size == SPIFFS_UNDEFINED_LEN ? 0 : fobj->size;
/* Map the offset according to the whence option */
switch (whence)
{
case SEEK_SET: /* The offset is set to offset bytes. */
pos = offset;
break;
case SEEK_CUR: /* The offset is set to its current location plus
* offset bytes. */
pos = offset + filep->f_pos;
break;
case SEEK_END: /* The offset is set to the size of the file plus
* offset bytes. */
pos = fsize + offset;
break;
default:
ret = -EINVAL;
goto errout_with_lock;
}
/* Verify the resulting file position */
if (pos < 0)
{
ret = -EINVAL;
goto errout_with_lock;
}
/* Attempts to set the position beyond the end of file should
* work if the file is open for write access.
*
* REVISIT: This simple implementation has no per-open storage that
* would be needed to retain the open flags.
*/
if (pos > fsize)
{
filep->f_pos = fsize;
ret = -ENOSYS;
goto errout_with_lock;
}
/* Set up for the new file position */
data_spndx = (pos > 0 ? (pos - 1) : 0) / SPIFFS_DATA_PAGE_SIZE(fs);
objndx_spndx = SPIFFS_OBJNDX_ENTRY_SPNDX(fs, data_spndx);
if (fobj->objndx_spndx != objndx_spndx)
{
int16_t pgndx;
ret =
spiffs_objlu_find_id_and_span(fs, fobj->objid | SPIFFS_OBJID_NDXFLAG,
objndx_spndx, 0, &pgndx);
if (ret < 0)
{
goto errout_with_lock;
}
fobj->objndx_spndx = objndx_spndx;
fobj->objndx_pgndx = pgndx;
}
filep->f_pos = pos;
spiffs_unlock_volume(fs);
return pos;
errout_with_lock:
spiffs_unlock_volume(fs);
return (off_t)ret;
}
/****************************************************************************
* Name: spiffs_ioctl
****************************************************************************/
static int spiffs_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
{
FAR struct inode *inode;
FAR struct spiffs_s *fs;
int ret;
finfo("filep=%p cmd=%d arg=%ld\n", filep, cmd, (long)arg);
DEBUGASSERT(filep->f_priv != NULL);
/* Get the mountpoint inode reference from the file structure and the
* volume state data from the inode structure
*/
inode = filep->f_inode;
fs = inode->i_private;
DEBUGASSERT(fs != NULL);
/* Get exclusive access to the file system */
ret = spiffs_lock_volume(fs);
if (ret < 0)
{
return ret;
}
/* Handle the IOCTL according to the command */
switch (cmd)
{
/* Run a consistency check on the file system media.
* IN: None
* OUT: None
*/
case FIOC_INTEGRITY:
{
ret = spiffs_consistency_check(fs);
}
break;
/* Force reformatting of media. All data will be lost.
* IN: None
* OUT: None
*/
case FIOC_REFORMAT:
{
/* Check if the MTD driver supports the MTDIOC_BULKERASE command */
ret = MTD_IOCTL(fs->mtd, MTDIOC_BULKERASE, 0);
if (ret < 0)
{
/* No.. we will have to erase a block at a time */
int16_t blkndx = 0;
while (blkndx < SPIFFS_GEO_BLOCK_COUNT(fs))
{
fs->max_erase_count = 0;
ret = spiffs_erase_block(fs, blkndx);
if (ret < 0)
{
ferr("ERROR: spiffs_erase_block() failed: %d\n", ret);
break;
}
blkndx++;
}
}
}
break;
/* Run garbage collection.
* IN: On entry holds the number of bytes to be recovered.
* OUT: None
*/
case FIOC_OPTIMIZE:
{
ret = spiffs_gc_check(fs, (size_t)arg);
}
break;
/* Dump logical content of FLASH.
* IN: None
* OUT: None
*/
#ifdef CONFIG_SPIFFS_DUMP
case FIOC_DUMP:
{
ret = spiffs_dump(fs);
}
break;
#endif
default:
/* Pass through to the contained MTD driver */
ret = MTD_IOCTL(fs->mtd, cmd, arg);
break;
}
spiffs_unlock_volume(fs);
return spiffs_map_errno(ret);
}
/****************************************************************************
* Name: spiffs_sync
*
* Description: Synchronize the file state on disk to match internal, in-
* memory state.
*
****************************************************************************/
static int spiffs_sync(FAR struct file *filep)
{
FAR struct inode *inode;
FAR struct spiffs_s *fs;
FAR struct spiffs_file_s *fobj;
ssize_t nflushed;
int ret;
finfo("filep=%p\n", filep);
DEBUGASSERT(filep->f_priv != NULL);
/* Get the mountpoint inode reference from the file structure and the
* volume state data from the inode structure
*/
inode = filep->f_inode;
fs = inode->i_private;
DEBUGASSERT(fs != NULL);
/* Recover the file object state from the struct file instance */
fobj = filep->f_priv;
/* Get exclusive access to the file system */
ret = spiffs_lock_volume(fs);
if (ret < 0)
{
return ret;
}
/* Flush all cached write data */
nflushed = spiffs_fobj_flush(fs, fobj);
if (nflushed < 0)
{
ferr("ERROR: spiffs_fobj_flush() failed: %d\n", ret);
ret = (int)nflushed;
}
spiffs_unlock_volume(fs);
return spiffs_map_errno(ret);
}
/****************************************************************************
* Name: spiffs_dup
****************************************************************************/
static int spiffs_dup(FAR const struct file *oldp, FAR struct file *newp)
{
FAR struct inode *inode;
FAR struct spiffs_s *fs;
FAR struct spiffs_file_s *fobj;
int ret;
finfo("Dup %p->%p\n", oldp, newp);
DEBUGASSERT(oldp->f_priv != NULL && oldp->f_inode != NULL &&
newp->f_priv == NULL && newp->f_inode != NULL);
/* Get the mountpoint inode reference from the file structure and the
* volume state data from the inode structure
*/
inode = oldp->f_inode;
fs = inode->i_private;
DEBUGASSERT(fs != NULL);
/* Recover our private data from the struct file instance */
fobj = oldp->f_priv;
/* Increment the reference count (atomically) */
ret = spiffs_lock_volume(fs);
if (ret >= 0)
{
fobj->crefs++;
spiffs_unlock_volume(fs);
/* Save a copy of the file object as the dup'ed file. */
newp->f_priv = fobj;
}
return ret;
}
/****************************************************************************
* Name: spiffs_fstat
*
* Description:
* Obtain information about an open file associated with the file
* descriptor 'fobj', and will write it to the area pointed to by 'buf'.
*
****************************************************************************/
static int spiffs_fstat(FAR const struct file *filep, FAR struct stat *buf)
{
FAR struct inode *inode;
FAR struct spiffs_s *fs;
FAR struct spiffs_file_s *fobj;
ssize_t nflushed;
int ret;
finfo("filep=%p buf=%p\n", filep, buf);
DEBUGASSERT(filep->f_priv != NULL &&
buf != NULL);
/* Get the mountpoint inode reference from the file structure and the
* volume state data from the inode structure
*/
inode = filep->f_inode;
fs = inode->i_private;
DEBUGASSERT(fs != NULL);
/* Recover the file object state from the struct file instance */
fobj = filep->f_priv;
/* Get exclusive access to the file system */
spiffs_lock_volume(fs);
/* Flush the cache and perform the common stat() operation */
nflushed = spiffs_fobj_flush(fs, fobj);
if (nflushed < 0)
{
ferr("ERROR: spiffs_fobj_flush() failed: %d\n", ret);
}
ret = spiffs_stat_pgndx(fs, fobj->objhdr_pgndx, fobj->objid, buf);
if (ret < 0)
{
ferr("ERROR: spiffs_stat_pgndx() failed: %d\n", ret);
}
spiffs_unlock_volume(fs);
return spiffs_map_errno(ret);
}
/****************************************************************************
* Name: spiffs_truncate
****************************************************************************/
static int spiffs_truncate(FAR struct file *filep, off_t length)
{
FAR struct inode *inode;
FAR struct spiffs_s *fs;
FAR struct spiffs_file_s *fobj;
off_t fsize;
int ret;
finfo("filep=%p length=%ld\n", filep, (long)length);
DEBUGASSERT(filep->f_priv != NULL &&
length >= 0);
/* Get the mountpoint inode reference from the file structure and the
* volume state data from the inode structure
*/
inode = filep->f_inode;
fs = inode->i_private;
DEBUGASSERT(fs != NULL);
/* Recover the file object state from the struct file instance */
fobj = filep->f_priv;
/* Get exclusive access to the file system */
spiffs_lock_volume(fs);
/* REVISIT: spiffs_fobj_truncate() can only truncate to smaller sizes. */
ret = spiffs_fobj_truncate(fs, fobj, length, false);
if (ret < 0)
{
ferr("ERROR: spiffs_fobj_truncate failed: %d/n", ret);
}
/* Check if we need to reset the file pointer. Probably could use
* 'length', but let's use the authoritative file file size for the
* comparison.
*/
fsize = fobj->size == SPIFFS_UNDEFINED_LEN ? 0 : fobj->size;
if (ret >= 0 && fsize < filep->f_pos)
{
/* Reset the file pointer to the new end-of-file position */
filep->f_pos = fsize;
}
spiffs_unlock_volume(fs);
return spiffs_map_errno(ret);
}
/****************************************************************************
* Name: spiffs_opendir
****************************************************************************/
static int spiffs_opendir(FAR struct inode *mountpt, FAR const char *relpath,
FAR struct fs_dirent_s **dir)
{
FAR struct spiffs_dir_s *sdir;
finfo("mountpt=%p relpath=%s dir=%p\n",
mountpt, relpath, dir);
DEBUGASSERT(mountpt != NULL && relpath != NULL && dir != NULL);
sdir = kmm_zalloc(sizeof(*sdir));
if (sdir == NULL)
{
return -ENOMEM;
}
/* Initialize for traversal of the 'directory' */
sdir->block = 0;
sdir->entry = 0;
*dir = &sdir->base;
return OK;
}
/****************************************************************************
* Name: spiffs_closedir
****************************************************************************/
static int spiffs_closedir(FAR struct inode *mountpt,
FAR struct fs_dirent_s *dir)
{
finfo("mountpt=%p dir=%p\n", mountpt, dir);
DEBUGASSERT(mountpt != NULL && dir != NULL);
kmm_free(dir);
return OK;
}
/****************************************************************************
* Name: spiffs_readdir
****************************************************************************/
static int spiffs_readdir(FAR struct inode *mountpt,
FAR struct fs_dirent_s *dir,
FAR struct dirent *dentry)
{
FAR struct spiffs_dir_s *sdir;
FAR struct spiffs_s *fs;
int16_t blkndx;
int entry;
int ret;
finfo("mountpt=%p dir=%p\n", mountpt, dir);
DEBUGASSERT(mountpt != NULL && dir != NULL);
sdir = (FAR struct spiffs_dir_s *)dir;
/* Get the mountpoint private data from the inode structure */
fs = mountpt->i_private;
DEBUGASSERT(fs != NULL);
/* Lock the SPIFFS volume */
spiffs_lock_volume(fs);
/* And visit the next file object */
ret = spiffs_foreach_objlu(fs, sdir->block, sdir->entry,
SPIFFS_VIS_NO_WRAP, 0, spiffs_readdir_callback,
NULL, dentry, &blkndx, &entry);
if (ret >= 0)
{
sdir->block = blkndx;
sdir->entry = entry + 1;
}
/* Release the lock on the file system */
spiffs_unlock_volume(fs);
return spiffs_map_errno(ret);
}
/****************************************************************************
* Name: spiffs_rewinddir
****************************************************************************/
static int spiffs_rewinddir(FAR struct inode *mountpt,
FAR struct fs_dirent_s *dir)
{
FAR struct spiffs_dir_s *sdir;
finfo("mountpt=%p dir=%p\n", mountpt, dir);
DEBUGASSERT(mountpt != NULL && dir != NULL);
sdir = (FAR struct spiffs_dir_s *)dir;
/* Reset as when opendir() was called. */
sdir->block = 0;
sdir->entry = 0;
return OK;
}
/****************************************************************************
* Name: spiffs_bind
****************************************************************************/
static int spiffs_bind(FAR struct inode *mtdinode, FAR const void *data,
FAR void **handle)
{
FAR struct spiffs_s *fs;
FAR struct mtd_dev_s *mtd;
FAR uint8_t *work;
size_t cache_size;
size_t cache_max;
size_t work_size;
size_t addrmask;
int ret;
finfo("mtdinode=%p data=%p handle=%p\n", mtdinode, data, handle);
DEBUGASSERT(mtdinode != NULL && handle != NULL);
/* Extract the MTD interface reference */
DEBUGASSERT(INODE_IS_MTD(mtdinode) && mtdinode->u.i_mtd != NULL);
mtd = mtdinode->u.i_mtd;
/* Create an instance of the SPIFFS file system */
fs = kmm_zalloc(sizeof(struct spiffs_s));
if (fs == NULL)
{
ferr("ERROR: Failed to allocate volume structure\n");
return -ENOMEM;
}
fs->mtd = mtd;
/* Get the MTD geometry */
ret = MTD_IOCTL(mtd, MTDIOC_GEOMETRY,
(unsigned long)((uintptr_t)&fs->geo));
if (ret < 0)
{
ferr("ERROR: MTD_IOCTL(MTDIOC_GEOMETRY) failed: %d\n", ret);
goto errout_with_volume;
}
fs->media_size = SPIFFS_GEO_EBLOCK_COUNT(fs) *
SPIFFS_GEO_EBLOCK_SIZE(fs);
fs->total_pages = fs->media_size /
SPIFFS_GEO_PAGE_SIZE(fs);
fs->pages_per_block = SPIFFS_GEO_EBLOCK_SIZE(fs) /
SPIFFS_GEO_PAGE_SIZE(fs);
/* Get the aligned cache size */
addrmask = (sizeof(FAR void *) - 1);
cache_size = (CONFIG_SPIFFS_CACHE_SIZE + addrmask) & ~addrmask;
/* Don't let the cache size exceed the maximum that is needed */
cache_max = SPIFFS_GEO_PAGE_SIZE(fs) << 5;
if (cache_size > cache_max)
{
cache_size = cache_max;
}
/* Allocate the cache */
fs->cache_size = cache_size;
fs->cache = kmm_malloc(cache_size);
if (fs->cache == NULL)
{
ferr("ERROR: Failed to allocate volume structure\n");
ret = -ENOMEM;
goto errout_with_volume;
}
spiffs_cache_initialize(fs);
/* Allocate the memory work buffer comprising 3*config->page_size bytes
* used throughout all file system operations.
*
* NOTE: Currently page size is equivalent to block size.
*
* REVISIT: The MTD work buffer was added. With some careful analysis,
* it should, however, be possible to get by with fewer page buffers.
*/
work_size = 3 * SPIFFS_GEO_PAGE_SIZE(fs);
work = kmm_malloc(work_size);
if (work == NULL)
{
ferr("ERROR: Failed to allocate work buffer\n");
ret = -ENOMEM;
goto errout_with_cache;
}
fs->work = &work[0];
fs->lu_work = &work[SPIFFS_GEO_PAGE_SIZE(fs)];
fs->mtd_work = &work[2 * SPIFFS_GEO_PAGE_SIZE(fs)];
nxrmutex_init(&fs->lock);
/* Check the file system */
ret = spiffs_objlu_scan(fs);
if (ret < 0)
{
ferr("ERROR: spiffs_objlu_scan() failed: %d\n", ret);
goto errout_with_work;
}
finfo("page index byte len: %u\n",
(unsigned int)SPIFFS_GEO_PAGE_SIZE(fs));
finfo("object lookup pages: %u\n",
(unsigned int)SPIFFS_OBJ_LOOKUP_PAGES(fs));
finfo("pages per block: %u\n",
(unsigned int)SPIFFS_GEO_PAGES_PER_BLOCK(fs));
finfo("page header length: %u\n",
(unsigned int)sizeof(struct spiffs_page_header_s));
finfo("object header index entries: %u\n",
(unsigned int)SPIFFS_OBJHDR_NDXLEN(fs));
finfo("object index entries: %u\n",
(unsigned int)SPIFFS_OBJNDX_LEN(fs));
finfo("free blocks: %u\n",
(unsigned int)fs->free_blocks);
#ifdef CONFIG_SPIFFS_CHECK_ONMOUNT
/* Perform the full consistency check */
ret = spiffs_consistency_check(fs);
if (ret < 0)
{
fwarn("WARNING: File system is damaged: %d\n", ret);
}
#endif
/* Return the new file system handle */
*handle = (FAR void *)fs;
return OK;
errout_with_work:
kmm_free(fs->work);
errout_with_cache:
kmm_free(fs->cache);
errout_with_volume:
kmm_free(fs);
return spiffs_map_errno(ret);
}
/****************************************************************************
* Name: spiffs_unbind
****************************************************************************/
static int spiffs_unbind(FAR void *handle, FAR struct inode **mtdinode,
unsigned int flags)
{
FAR struct spiffs_s *fs = (FAR struct spiffs_s *)handle;
FAR struct spiffs_file_s *fobj;
finfo("handle=%p mtdinode=%p flags=%02x\n",
handle, mtdinode, flags);
DEBUGASSERT(fs != NULL);
/* Lock the file system */
spiffs_lock_volume(fs);
/* Are there open file system? If so, are we being forced to unmount? */
if (!dq_empty(&fs->objq) && (flags & MNT_FORCE) == 0)
{
fwarn("WARNING: Open files and umount not forced\n");
spiffs_unlock_volume(fs);
return spiffs_map_errno(-EBUSY);
}
/* Release all of the open file objects... Very scary stuff. */
while ((fobj = (FAR struct spiffs_file_s *)dq_peek(&fs->objq)) != NULL)
{
/* Free the file object */
spiffs_fobj_free(fs, fobj, false);
}
/* Free allocated working buffers */
if (fs->work != NULL)
{
kmm_free(fs->work);
}
if (fs->cache != NULL)
{
kmm_free(fs->cache);
}
/* Free the volume memory (note that the mutex is now stale!) */
spiffs_unlock_volume(fs);
nxrmutex_destroy(&fs->lock);
kmm_free(fs);
return spiffs_map_errno(OK);
}
/****************************************************************************
* Name: spiffs_statfs
****************************************************************************/
static int spiffs_statfs(FAR struct inode *mountpt, FAR struct statfs *buf)
{
FAR struct spiffs_s *fs;
FAR struct spiffs_file_s *fobj;
uint32_t pages_per_block;
uint32_t blocks;
uint32_t obj_lupages;
uint32_t data_pgsize;
uint32_t ndata_pages;
uint32_t nfile_objs;
finfo("mountpt=%p buf=%p\n", mountpt, buf);
DEBUGASSERT(mountpt != NULL && buf != NULL);
/* Get the mountpoint private data from the inode structure */
fs = mountpt->i_private;
DEBUGASSERT(fs != NULL);
/* Lock the SPIFFS volume */
spiffs_lock_volume(fs);
/* Collect some statistics */
pages_per_block = SPIFFS_GEO_PAGES_PER_BLOCK(fs);
blocks = SPIFFS_GEO_BLOCK_COUNT(fs);
obj_lupages = SPIFFS_OBJ_LOOKUP_PAGES(fs);
data_pgsize = SPIFFS_DATA_PAGE_SIZE(fs);
/* -2 for spare blocks, +1 for emergency page */
ndata_pages = (blocks - 2) * (pages_per_block - obj_lupages) + 1;
/* Count the number of file objects */
nfile_objs = 0;
for (fobj = (FAR struct spiffs_file_s *)dq_peek(&fs->objq);
fobj != NULL;
fobj = (FAR struct spiffs_file_s *)dq_next((FAR dq_entry_t *)fobj))
{
nfile_objs++;
}
/* Fill in the statfs structure */
buf->f_type = SPIFFS_SUPER_MAGIC;
buf->f_namelen = CONFIG_SPIFFS_NAME_MAX - 1;
buf->f_bsize = data_pgsize;
buf->f_blocks = ndata_pages;
buf->f_bfree = ndata_pages - fs->alloc_pages;
buf->f_bavail = buf->f_bfree;
buf->f_files = nfile_objs;
buf->f_ffree = buf->f_bfree; /* SWAG */
/* Release the lock on the file system */
spiffs_unlock_volume(fs);
return OK;
}
/****************************************************************************
* Name: spiffs_unlink
****************************************************************************/
static int spiffs_unlink(FAR struct inode *mountpt, FAR const char *relpath)
{
FAR struct spiffs_s *fs;
FAR struct spiffs_file_s *fobj;
int16_t pgndx;
int ret;
finfo("mountpt=%p relpath=%s\n", mountpt, relpath);
DEBUGASSERT(mountpt != NULL && relpath != NULL);
if (strlen(relpath) > CONFIG_SPIFFS_NAME_MAX - 1)
{
return -ENAMETOOLONG;
}
/* Get the file system structure from the inode reference. */
fs = mountpt->i_private;
DEBUGASSERT(fs != NULL);
/* Get exclusive access to the file system */
spiffs_lock_volume(fs);
/* Find the page index to the object header associated with this path */
ret = spiffs_find_objhdr_pgndx(fs, (FAR const uint8_t *)relpath, &pgndx);
if (ret == -ENOENT)
{
fwarn("WARNING: No objhdr found for relpath '%s': %d\n", relpath, ret);
goto errout_with_lock;
}
else if (ret < 0)
{
ferr("ERROR: spiffs_find_objhdr_pgndx failed: %d\n", ret);
goto errout_with_lock;
}
/* Check to see if there is an open file reference for the object at this
* page index.
*/
ret = spiffs_find_fobj_bypgndx(fs, pgndx, &fobj);
if (ret >= 0)
{
/* If so, then we cannot unlink the file now. Just mark the file as
* 'unlinked' so that it can be removed when the file object is
* released.
*/
fobj->flags |= SFO_FLAG_UNLINKED;
}
else
{
/* Otherwise, we will need to re-open the file.
* First, allocate new file object.
*/
fobj = (FAR struct spiffs_file_s *)
kmm_zalloc(sizeof(struct spiffs_file_s));
if (fobj == NULL)
{
fwarn("WARNING: Failed to allocate fobj\n");
ret = -ENOMEM;
goto errout_with_lock;
}
/* Use the page index to open the file */
ret = spiffs_fobj_open_bypage(fs, pgndx, fobj);
if (ret < 0)
{
ferr("ERROR: spiffs_fobj_open_bypage failed: %d\n", ret);
kmm_free(fobj);
goto errout_with_lock;
}
/* Now we can remove the file by truncating it to zero length */
ret = spiffs_fobj_truncate(fs, fobj, 0, true);
kmm_free(fobj);
if (ret < 0)
{
ferr("ERROR: spiffs_fobj_truncate failed: %d\n", ret);
goto errout_with_lock;
}
}
/* Release the lock on the volume */
spiffs_unlock_volume(fs);
return OK;
errout_with_lock:
spiffs_unlock_volume(fs);
return spiffs_map_errno(ret);
}
/****************************************************************************
* Name: spiffs_mkdir
****************************************************************************/
static int spiffs_mkdir(FAR struct inode *mountpt, FAR const char *relpath,
mode_t mode)
{
finfo("mountpt=%p relpath=%s mode=%04x\n", mountpt, relpath, mode);
DEBUGASSERT(mountpt != NULL && relpath != NULL);
/* Directories are not supported */
return -ENOSYS;
}
/****************************************************************************
* Name: spiffs_rmdir
****************************************************************************/
static int spiffs_rmdir(FAR struct inode *mountpt, FAR const char *relpath)
{
finfo("mountpt=%p relpath=%s\n", mountpt, relpath);
DEBUGASSERT(mountpt != NULL && relpath != NULL);
/* Directories are not supported */
return -ENOSYS;
}
/****************************************************************************
* Name: spiffs_rename
****************************************************************************/
static int spiffs_rename(FAR struct inode *mountpt,
FAR const char *oldrelpath,
FAR const char *newrelpath)
{
FAR struct spiffs_s *fs;
FAR struct spiffs_file_s *fobj;
int16_t oldpgndx;
int16_t newpgndx;
int ret;
finfo("mountpt=%p oldrelpath=%s newrelpath=%s\n",
mountpt, oldrelpath, newrelpath);
DEBUGASSERT(mountpt != NULL && oldrelpath != NULL && newrelpath != NULL);
/* Get the file system structure from the inode reference. */
fs = mountpt->i_private;
DEBUGASSERT(fs != NULL);
if (strlen(newrelpath) > CONFIG_SPIFFS_NAME_MAX - 1 ||
strlen(oldrelpath) > CONFIG_SPIFFS_NAME_MAX - 1)
{
return -ENAMETOOLONG;
}
/* Get exclusive access to the file system */
spiffs_lock_volume(fs);
/* Get the page index of the object header for the oldrelpath */
ret = spiffs_find_objhdr_pgndx(fs, (FAR const uint8_t *)oldrelpath,
&oldpgndx);
if (ret < 0)
{
fwarn("WARNING: spiffs_find_objhdr_pgndx failed: %d\n", ret);
goto errout_with_lock;
}
/* Check if there is any file object corresponding to the newrelpath */
ret = spiffs_find_objhdr_pgndx(fs, (FAR const uint8_t *)newrelpath,
&newpgndx);
if (ret == -ENOENT)
{
ret = OK;
}
else if (ret >= 0)
{
ret = -EEXIST;
}
if (ret < 0)
{
goto errout_with_lock;
}
/* Allocate new file object. NOTE: The file could already be open. */
fobj = (FAR struct spiffs_file_s *)
kmm_zalloc(sizeof(struct spiffs_file_s));
if (fobj == NULL)
{
ret = -ENOMEM;
goto errout_with_lock;
}
/* Use the page index to open the file */
ret = spiffs_fobj_open_bypage(fs, oldpgndx, fobj);
if (ret < 0)
{
goto errout_with_fobj;
}
/* Then update the file name */
ret = spiffs_fobj_update_ndxhdr(fs, fobj, fobj->objid,
fobj->objhdr_pgndx, 0,
(FAR const uint8_t *)newrelpath, 0,
&newpgndx);
errout_with_fobj:
kmm_free(fobj);
errout_with_lock:
spiffs_unlock_volume(fs);
return spiffs_map_errno(ret);
}
/****************************************************************************
* Name: spiffs_stat
****************************************************************************/
static int spiffs_stat(FAR struct inode *mountpt, FAR const char *relpath,
FAR struct stat *buf)
{
FAR struct spiffs_s *fs;
int16_t pgndx;
int len;
int ret;
finfo("mountpt=%p relpath=%s buf=%p\n", mountpt, relpath, buf);
DEBUGASSERT(mountpt != NULL && relpath != NULL && buf != NULL);
/* Skip over any leading directory separators (shouldn't be any) */
for (; *relpath == '/'; relpath++)
{
}
/* Handle long file names */
len = strlen(relpath);
if (len > CONFIG_SPIFFS_NAME_MAX - 1)
{
return -ENAMETOOLONG;
}
/* Get the file system structure from the inode reference. */
fs = mountpt->i_private;
DEBUGASSERT(fs != NULL);
/* Get exclusive access to the file system */
spiffs_lock_volume(fs);
/* Handle stat of the SPIFFS root directory */
if (len == 0)
{
memset(buf, 0, sizeof(struct stat));
buf->st_mode = S_IFDIR | S_IRWXO | S_IRWXG | S_IRWXU;
buf->st_blksize = fs->geo.blocksize;
buf->st_blocks = fs->media_size / fs->geo.blocksize;
ret = OK;
}
else
{
/* Find the object associated with this relative path */
ret = spiffs_find_objhdr_pgndx(fs, (FAR const uint8_t *)relpath,
&pgndx);
if (ret < 0)
{
goto errout_with_lock;
}
/* And get information about the object */
ret = spiffs_stat_pgndx(fs, pgndx, 0, buf);
if (ret < 0)
{
ferr("ERROR: spiffs_stat_pgndx failed: %d\n", ret);
}
}
errout_with_lock:
spiffs_unlock_volume(fs);
return spiffs_map_errno(ret);
}
/****************************************************************************
* Public Functions
****************************************************************************/
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