*/
-const char *yaffs_fs_c_version = "$Id: yaffs_fs.c,v 1.24 2005-08-01 20:54:45 luc Exp $";
+const char *yaffs_fs_c_version = "$Id: yaffs_fs.c,v 1.28 2005-08-09 03:52:23 charles Exp $";
extern const char *yaffs_guts_c_version;
#endif
{
struct address_space *mapping = page->mapping;
+ loff_t offset = (loff_t)page->index << PAGE_CACHE_SHIFT;
struct inode *inode;
unsigned long end_index;
char *buffer;
if (!inode)
BUG();
+ if (offset > inode->i_size)
+ {
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_writepage at %08x, inode size = %08x!!!\n", (unsigned)(page->index << PAGE_CACHE_SHIFT), (unsigned) inode->i_size));
+ T(YAFFS_TRACE_OS,(KERN_DEBUG" -> don't care!!\n"));
+ unlock_page(page);
+ return 0;
+ }
+
end_index = inode->i_size >> PAGE_CACHE_SHIFT;
/* easy case */
obj = yaffs_InodeToObject(inode);
yaffs_GrossLock(obj->myDev);
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_writepage at %08x, size %08x\n", (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"writepag0: obj = %05x, ino = %05x\n", (int) obj->variant.fileVariant.fileSize, (int) inode->i_size));
nWritten = yaffs_WriteDataToFile(obj,buffer,page->index << PAGE_CACHE_SHIFT,nBytes,0);
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"writepag1: obj = %05x, ino = %05x\n", (int) obj->variant.fileVariant.fileSize, (int) inode->i_size));
+
yaffs_GrossUnlock(obj->myDev);
kunmap(page);
else
{
- // Unlink the target if it exists
- removed = yaffs_Unlink(yaffs_InodeToObject(new_dir),new_dentry->d_name.name);
-
-
+ // Now does unlinking internally using shadowing mechanism
+
retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir),old_dentry->d_name.name,
yaffs_InodeToObject(new_dir),new_dentry->d_name.name);
struct dentry * root;
yaffs_Device *dev = 0;
char devname_buf[BDEVNAME_SIZE+1];
+ struct mtd_info *mtd;
int err;
sb->s_magic = YAFFS_MAGIC;
#endif
+ T(YAFFS_TRACE_ALWAYS,("yaffs: Attempting MTD mount on %u.%u, \"%s\"\n",
+ MAJOR(sb->s_dev),MINOR(sb->s_dev), yaffs_devname(sb, devname_buf)));
+
+ // Check it's an mtd device.....
+ if(MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
+ {
+ return NULL; // This isn't an mtd device
+ }
+ // Get the device
+ mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
+ if (!mtd)
{
- struct mtd_info *mtd;
-
- T(YAFFS_TRACE_ALWAYS,("yaffs: Attempting MTD mount on %u.%u, \"%s\"\n",
- MAJOR(sb->s_dev),MINOR(sb->s_dev), yaffs_devname(sb, devname_buf)));
-
- // Check it's an mtd device.....
- if(MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
- {
- return NULL; // This isn't an mtd device
- }
-
- // Get the device
- mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
- if (!mtd)
+ T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device #%u doesn't appear to exist\n", MINOR(sb->s_dev)));
+ return NULL;
+ }
+
+ // Check it's NAND
+ if(mtd->type != MTD_NANDFLASH)
+ {
+ T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device is not NAND it's type %d\n", mtd->type));
+ return NULL;
+ }
+
+ T(YAFFS_TRACE_OS,(" erase %p\n",mtd->erase));
+ T(YAFFS_TRACE_OS,(" read %p\n",mtd->read));
+ T(YAFFS_TRACE_OS,(" write %p\n",mtd->write));
+ T(YAFFS_TRACE_OS,(" readoob %p\n",mtd->read_oob));
+ T(YAFFS_TRACE_OS,(" writeoob %p\n",mtd->write_oob));
+ T(YAFFS_TRACE_OS,(" block_isbad %p\n",mtd->block_isbad));
+ T(YAFFS_TRACE_OS,(" block_markbad %p\n",mtd->block_markbad));
+ T(YAFFS_TRACE_OS,(" oobblock %d\n",mtd->oobblock));
+ T(YAFFS_TRACE_OS,(" oobsize %d\n",mtd->oobsize));
+ T(YAFFS_TRACE_OS,(" erasesize %d\n",mtd->erasesize));
+ T(YAFFS_TRACE_OS,(" size %d\n",mtd->size));
+
+ if(yaffsVersion == 2)
+ {
+ // Check for version 2 style functions
+ if(!mtd->erase ||
+ !mtd->block_isbad ||
+ !mtd->block_markbad ||
+ !mtd->read ||
+ !mtd->write ||
+ !mtd->write_ecc ||
+ !mtd->read_ecc ||
+ !mtd->read_oob ||
+ !mtd->write_oob )
{
- T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device #%u doesn't appear to exist\n", MINOR(sb->s_dev)));
+ T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support required functions\n"));;
return NULL;
}
-
- // Check it's NAND
- if(mtd->type != MTD_NANDFLASH)
+
+ if(mtd->oobblock < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
+ mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE)
{
- T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device is not NAND it's type %d\n", mtd->type));
+ T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support have the right page sizes\n"));
return NULL;
- }
-
- T(YAFFS_TRACE_OS,(" erase %p\n",mtd->erase));
- T(YAFFS_TRACE_OS,(" read %p\n",mtd->read));
- T(YAFFS_TRACE_OS,(" write %p\n",mtd->write));
- T(YAFFS_TRACE_OS,(" readoob %p\n",mtd->read_oob));
- T(YAFFS_TRACE_OS,(" writeoob %p\n",mtd->write_oob));
- T(YAFFS_TRACE_OS,(" block_isbad %p\n",mtd->block_isbad));
- T(YAFFS_TRACE_OS,(" block_markbad %p\n",mtd->block_markbad));
- T(YAFFS_TRACE_OS,(" oobblock %d\n",mtd->oobblock));
- T(YAFFS_TRACE_OS,(" oobsize %d\n",mtd->oobsize));
- T(YAFFS_TRACE_OS,(" erasesize %d\n",mtd->erasesize));
- T(YAFFS_TRACE_OS,(" size %d\n",mtd->size));
-
- if(yaffsVersion == 2)
+ } }
+ else
+ {
+ // Check for V1 style functions
+ if(!mtd->erase ||
+ !mtd->read ||
+ !mtd->write ||
+ !mtd->write_ecc ||
+ !mtd->read_ecc ||
+ !mtd->read_oob ||
+ !mtd->write_oob )
{
- // Check for version 2 style functions
- if(!mtd->erase ||
- !mtd->block_isbad ||
- !mtd->block_markbad ||
- !mtd->read ||
- !mtd->write ||
- !mtd->write_ecc ||
- !mtd->read_ecc ||
- !mtd->read_oob ||
- !mtd->write_oob )
- {
- T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support required functions\n"));;
- return NULL;
- }
-
- if(mtd->oobblock < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
- mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE)
- {
- T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support have the right page sizes\n"));
- return NULL;
- } }
- else
+ T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support required functions\n"));;
+ return NULL;
+ }
+
+ if(mtd->oobblock != YAFFS_BYTES_PER_CHUNK ||
+ mtd->oobsize != YAFFS_BYTES_PER_SPARE)
{
- // Check for V1 style functions
- if(!mtd->erase ||
- !mtd->read ||
- !mtd->write ||
- !mtd->write_ecc ||
- !mtd->read_ecc ||
- !mtd->read_oob ||
- !mtd->write_oob )
- {
- T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support required functions\n"));;
- return NULL;
- }
-
- if(mtd->oobblock != YAFFS_BYTES_PER_CHUNK ||
- mtd->oobsize != YAFFS_BYTES_PER_SPARE)
- {
- T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support have the right page sizes\n"));
- return NULL;
- }
+ T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support have the right page sizes\n"));
+ return NULL;
}
-
+ }
+
- // OK, so if we got here, we have an MTD that's NAND and looks
- // like it has the right capabilities
- // Set the yaffs_Device up for mtd
+ // OK, so if we got here, we have an MTD that's NAND and looks
+ // like it has the right capabilities
+ // Set the yaffs_Device up for mtd
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
- sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
+ sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
#else
- sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
+ sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
#endif
- if(!dev)
- {
- // Deep shit could not allocate device structure
- T(YAFFS_TRACE_ALWAYS,("yaffs_read_super: Failed trying to allocate yaffs_Device. \n"));
- return NULL;
- }
+ if(!dev)
+ {
+ // Deep shit could not allocate device structure
+ T(YAFFS_TRACE_ALWAYS,("yaffs_read_super: Failed trying to allocate yaffs_Device. \n"));
+ return NULL;
+ }
- memset(dev,0,sizeof(yaffs_Device));
- dev->genericDevice = mtd;
- dev->name = mtd->name;
+ memset(dev,0,sizeof(yaffs_Device));
+ dev->genericDevice = mtd;
+ dev->name = mtd->name;
- // Set up the memory size parameters....
-
- nBlocks = mtd->size / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
+ // Set up the memory size parameters....
+
+ nBlocks = mtd->size / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
+ dev->startBlock = 0;
+ dev->endBlock = nBlocks - 1;
+ dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
+ dev->nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
+ dev->nReservedBlocks = 5;
+ dev->nShortOpCaches = 10; // Enable short op caching
+
+
+ // ... and the functions.
+ if(yaffsVersion == 2)
+ {
+ dev->writeChunkWithTagsToNAND = nandmtd2_WriteChunkWithTagsToNAND;
+ dev->readChunkWithTagsFromNAND = nandmtd2_ReadChunkWithTagsFromNAND;
+ dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
+ dev->queryNANDBlock = nandmtd2_QueryNANDBlock;
+ dev->spareBuffer = YMALLOC(mtd->oobsize);
+ dev->isYaffs2 = 1;
+ dev->nBytesPerChunk = mtd->oobblock;
+ dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
+ nBlocks = mtd->size / mtd->erasesize;
dev->startBlock = 0;
dev->endBlock = nBlocks - 1;
- dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
- dev->nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
- dev->nReservedBlocks = 5;
- dev->nShortOpCaches = 10; // Enable short op caching
-
-
- // ... and the functions.
- if(yaffsVersion == 2)
- {
- dev->writeChunkWithTagsToNAND = nandmtd2_WriteChunkWithTagsToNAND;
- dev->readChunkWithTagsFromNAND = nandmtd2_ReadChunkWithTagsFromNAND;
- dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
- dev->queryNANDBlock = nandmtd2_QueryNANDBlock;
- dev->spareBuffer = YMALLOC(mtd->oobsize);
- dev->isYaffs2 = 1;
- dev->nBytesPerChunk = mtd->oobblock;
- dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
- nBlocks = mtd->size / mtd->erasesize;
- dev->startBlock = 0;
- dev->endBlock = nBlocks - 1;
- }
- else
- {
- dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
- dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
- dev->isYaffs2 = 0;
- }
- // ... and common functions
- dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
- dev->initialiseNAND = nandmtd_InitialiseNAND;
-
- dev->putSuperFunc = yaffs_MTDPutSuper;
-
-#ifdef CONFIG_YAFFS_USE_NANDECC
- dev->useNANDECC = 1;
-#endif
}
+ else
+ {
+ dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
+ dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
+ dev->isYaffs2 = 0;
+ }
+ // ... and common functions
+ dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
+ dev->initialiseNAND = nandmtd_InitialiseNAND;
+
+ dev->putSuperFunc = yaffs_MTDPutSuper;
+
+#ifndef CONFIG_YAFFS_DOES_ECC
+ dev->useNANDECC = 1;
+#endif
/* we assume this is protected by lock_kernel() in mount/umount */
list_add_tail(&dev->devList, &yaffs_dev_list);
projects / yaffs2.git / blobdiff