X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=blobdiff_plain;f=direct%2Fyaffsfs.c;h=3f18f7b002b439a3370c74a76b4daa702a6b5c06;hp=ba7a6a862e45ef39e2142cdca38a01ab50308db9;hb=dff2fb3fa3e86a6a72f120676e98910ab1dfc5aa;hpb=f216bcabdaf791aa93ad2e58c1d747d2d8bd6617 diff --git a/direct/yaffsfs.c b/direct/yaffsfs.c index ba7a6a8..3f18f7b 100644 --- a/direct/yaffsfs.c +++ b/direct/yaffsfs.c @@ -1,22 +1,23 @@ /* - * YAFFS: Yet another FFS. A NAND-flash specific file system. - * yaffsfs.c The interface functions for using YAFFS via a "direct" interface. + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. * - * Copyright (C) 2002 Aleph One Ltd. + * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. - * */ - + #include "yaffsfs.h" #include "yaffs_guts.h" #include "yaffscfg.h" -#include // for memset #include "yportenv.h" +#include "yaffs_trace.h" + +#include /* for memset */ #define YAFFSFS_MAX_SYMLINK_DEREFERENCES 5 @@ -25,1171 +26,2149 @@ #endif -const char *yaffsfs_c_version="$Id: yaffsfs.c,v 1.2 2004-11-22 03:22:25 charles Exp $"; +/* YAFFSFS_RW_SIZE must be a power of 2 */ +#define YAFFSFS_RW_SHIFT (13) +#define YAFFSFS_RW_SIZE (1<= YAFFSFS_N_HANDLES) + return NULL; -// Handle management. -// + return &yaffsfs_handle[h]; +} -typedef struct +yaffsfs_Inode *yaffsfs_GetInodePointer(int handle) { - __u8 inUse:1; // this handle is in use - __u8 readOnly:1; // this handle is read only - __u8 append:1; // append only - __u8 exclusive:1; // exclusive - __u32 position; // current position in file - yaffs_Object *obj; // the object -}yaffsfs_Handle; + yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle); + + if(h && h->useCount > 0 && h->inodeId >= 0 && h->inodeId < YAFFSFS_N_HANDLES) + return &yaffsfs_inode[h->inodeId]; + return NULL; +} -static yaffs_Object *yaffsfs_FindObject(yaffs_Object *relativeDirectory, const char *path, int symDepth); +struct yaffs_obj *yaffsfs_GetHandleObject(int handle) +{ + yaffsfs_Inode *in = yaffsfs_GetInodePointer(handle); + if(in) + return in->iObj; + return NULL; +} -static yaffsfs_Handle yaffsfs_handle[YAFFSFS_N_HANDLES]; +/* + * yaffsfs_FindInodeIdForObject + * Find the inode entry for an object, if it exists. + */ -// yaffsfs_InitHandle -/// Inilitalise handles on start-up. -// -static int yaffsfs_InitHandles(void) +static int yaffsfs_FindInodeIdForObject(struct yaffs_obj *obj) { int i; - for(i = 0; i < YAFFSFS_N_HANDLES; i++) - { - yaffsfs_handle[i].inUse = 0; - yaffsfs_handle[i].obj = NULL; + int ret = -1; + + if(obj) + obj = yaffs_get_equivalent_obj(obj); + + /* Look for it in open inode table*/ + for(i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++){ + if(yaffsfs_inode[i].iObj == obj) + ret = i; } - return 0; + return ret; } -yaffsfs_Handle *yaffsfs_GetHandlePointer(int h) +/* + * yaffsfs_GetInodeIdForObject + * Grab an inode entry when opening a new inode. + */ +static int yaffsfs_GetInodeIdForObject(struct yaffs_obj *obj) { - if(h < 0 || h >= YAFFSFS_N_HANDLES) - { - return NULL; + int i; + int ret; + yaffsfs_Inode *in = NULL; + + if(obj) + obj = yaffs_get_equivalent_obj(obj); + + ret = yaffsfs_FindInodeIdForObject(obj); + + for(i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++){ + if(!yaffsfs_inode[i].iObj) + ret = i; + } + + if(ret>=0){ + in = &yaffsfs_inode[ret]; + if(!in->iObj) + in->count = 0; + in->iObj = obj; + in->count++; } - return &yaffsfs_handle[h]; + + return ret; } -yaffs_Object *yaffsfs_GetHandleObject(int handle) + +static int yaffsfs_CountHandles(struct yaffs_obj *obj) { - yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle); + int i = yaffsfs_FindInodeIdForObject(obj); - if(h && h->inUse) - { - return h->obj; - } + if(i >= 0) + return yaffsfs_inode[i].count; + else + return 0; +} + +static void yaffsfs_ReleaseInode(yaffsfs_Inode *in) +{ + struct yaffs_obj *obj; - return NULL; + obj = in->iObj; + + if(obj->unlinked) + yaffs_del_obj(obj); + + obj->my_inode = NULL; + in->iObj = NULL; + +} + +static void yaffsfs_PutInode(int inodeId) +{ + if(inodeId >= 0 && inodeId < YAFFSFS_N_HANDLES){ + yaffsfs_Inode *in = & yaffsfs_inode[inodeId]; + in->count--; + if(in->count <= 0) + yaffsfs_ReleaseInode(in); + } } -//yaffsfs_GetHandle -// Grab a handle (when opening a file) -// +/* + * yaffsfs_GetHandle + * Grab a handle (when opening a file) + */ -static int yaffsfs_GetHandle(void) +static int yaffsfs_GetNewHandle(void) { int i; yaffsfs_Handle *h; - - for(i = 0; i < YAFFSFS_N_HANDLES; i++) - { + + for(i = 0; i < YAFFSFS_N_HANDLES; i++){ h = yaffsfs_GetHandlePointer(i); - if(!h) - { - // todo bug: should never happen + if(!h){ + /* todo bug: should never happen */ } - if(!h->inUse) - { + if(h->useCount < 1){ memset(h,0,sizeof(yaffsfs_Handle)); - h->inUse=1; + h->inodeId=-1; + h->useCount=1; return i; } } return -1; } -// yaffs_PutHandle -// Let go of a handle (when closing a file) -// +/* + * yaffs_get_handle + * Increase use of handle when reading/writing a file + */ +static int yaffsfs_GetHandle(int handle) +{ + yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle); + + if(h && h->useCount > 0){ + h->useCount++; + } + return 0; +} + +/* + * yaffs_put_handle + * Let go of a handle when closing a file or aborting an open or + * ending a read or write. + */ static int yaffsfs_PutHandle(int handle) { yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle); - - if(h) - { - h->inUse = 0; - h->obj = NULL; + + if(h && h->useCount > 0){ + h->useCount--; + if(h->useCount < 1){ + if(h->inodeId >= 0){ + yaffsfs_PutInode(h->inodeId); + h->inodeId = -1; + } + } } return 0; } -// Stuff to search for a directory from a path + +/* + * Stuff to handle names. + */ -int yaffsfs_Match(char a, char b) +int yaffsfs_Match(YCHAR a, YCHAR b) { - // case sensitive + /* case sensitive */ return (a == b); } -// yaffsfs_FindDevice -// yaffsfs_FindRoot -// Scan the configuration list to find the root. -static yaffs_Device *yaffsfs_FindDevice(const char *path, char **restOfPath) +int yaffsfs_IsPathDivider(YCHAR ch) { - yaffsfs_DeviceConfiguration *cfg = yaffsfs_configurationList; - const char *leftOver; - const char *p; - - while(cfg && cfg->prefix && cfg->dev) - { + const YCHAR *str = YAFFS_PATH_DIVIDERS; + + while(*str){ + if(*str == ch) + return 1; + str++; + } + + return 0; +} + +int yaffsfs_CheckNameLength(const char *name) +{ + int retVal = 0; + + new_nameLength = yaffs_strnlen(newname,YAFFS_MAX_NAME_LENGTH+1); + + if(new_nameLength == 0){ + yaffsfs_SetError(-ENOENT); + retVal = -1; + } else if (new_nameLength > YAFFS_MAX_NAME_LENGTH){ + yaffsfs_SetError(-ENAMETOOLONG); + retVal = -1; + } + + return retVal; +} + +LIST_HEAD(yaffsfs_deviceList); + +/* + * yaffsfs_FindDevice + * yaffsfs_FindRoot + * Scan the configuration list to find the root. + * Curveballs: Should match paths that end in '/' too + * Curveball2 Might have "/x/ and "/x/y". Need to return the longest match + */ +static struct yaffs_dev *yaffsfs_FindDevice(const YCHAR *path, YCHAR **restOfPath) +{ + struct list_head *cfg; + const YCHAR *leftOver; + const YCHAR *p; + struct yaffs_dev *retval = NULL; + struct yaffs_dev *dev = NULL; + int thisMatchLength; + int longestMatch = -1; + int matching; + + /* + * Check all configs, choose the one that: + * 1) Actually matches a prefix (ie /a amd /abc will not match + * 2) Matches the longest. + */ + list_for_each(cfg, &yaffsfs_deviceList){ + dev = list_entry(cfg, struct yaffs_dev, dev_list); leftOver = path; - p = cfg->prefix; - while(*p && *leftOver && yaffsfs_Match(*p,*leftOver)) - { - p++; - leftOver++; + p = dev->param.name; + thisMatchLength = 0; + matching = 1; + + + while(matching && *p && *leftOver){ + /* Skip over any /s */ + while(yaffsfs_IsPathDivider(*p)) + p++; + + /* Skip over any /s */ + while(yaffsfs_IsPathDivider(*leftOver)) + leftOver++; + + /* Now match the text part */ + while(matching && + *p && !yaffsfs_IsPathDivider(*p) && + *leftOver && !yaffsfs_IsPathDivider(*leftOver)){ + if(yaffsfs_Match(*p,*leftOver)){ + p++; + leftOver++; + thisMatchLength++; + } else { + matching = 0; + } + } } - if(!*p && (!*leftOver || *leftOver == '/')) + + /* Skip over any /s in leftOver */ + while(yaffsfs_IsPathDivider(*leftOver)) + leftOver++; + + // Skip over any /s in p + while(yaffsfs_IsPathDivider(*p)) + p++; + + // p should now be at the end of the string (ie. fully matched) + if(*p) + matching = 0; + + if( matching && (thisMatchLength > longestMatch)) { // Matched prefix - *restOfPath = (char *)leftOver; - return cfg->dev; + *restOfPath = (YCHAR *)leftOver; + retval = dev; + longestMatch = thisMatchLength; } - cfg++; + } - return NULL; + return retval; } -static yaffs_Object *yaffsfs_FindRoot(const char *path, char **restOfPath) + +static struct yaffs_obj *yaffsfs_FindRoot(const YCHAR *path, YCHAR **restOfPath) { - yaffs_Device *dev; - + struct yaffs_dev *dev; + dev= yaffsfs_FindDevice(path,restOfPath); - if(dev && dev->isMounted) - { - return dev->rootDir; + if(dev && dev->is_mounted){ + return dev->root_dir; } return NULL; } -static yaffs_Object *yaffsfs_FollowLink(yaffs_Object *obj,int symDepth) +static struct yaffs_obj *yaffsfs_FollowLink(struct yaffs_obj *obj,int symDepth) { - while(obj && obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) - { - char *alias = obj->variant.symLinkVariant.alias; - - if(*alias == '/') - { - // Starts with a /, need to scan from root up - obj = yaffsfs_FindObject(NULL,alias,symDepth++); - } + if(obj) + obj = yaffs_get_equivalent_obj(obj); + + while(obj && obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK){ + YCHAR *alias = obj->variant.symlink_variant.alias; + + if(yaffsfs_IsPathDivider(*alias)) + /* Starts with a /, need to scan from root up */ + obj = yaffsfs_FindObject(NULL,alias,symDepth++,1); else - { - // Relative to here, so use the parent of the symlink as a start - obj = yaffsfs_FindObject(obj->parent,alias,symDepth++); - } + /* Relative to here, so use the parent of the symlink as a start */ + obj = yaffsfs_FindObject(obj->parent,alias,symDepth++,1); } return obj; } -// yaffsfs_FindDirectory -// Parse a path to determine the directory and the name within the directory. -// -// eg. "/data/xx/ff" --> puts name="ff" and returns the directory "/data/xx" -static yaffs_Object *yaffsfs_DoFindDirectory(yaffs_Object *startDir,const char *path,char **name,int symDepth) +/* + * yaffsfs_FindDirectory + * Parse a path to determine the directory and the name within the directory. + * + * eg. "/data/xx/ff" --> puts name="ff" and returns the directory "/data/xx" + */ +static struct yaffs_obj *yaffsfs_DoFindDirectory(struct yaffs_obj *startDir, + const YCHAR *path, YCHAR **name, int symDepth) { - yaffs_Object *dir; - char *restOfPath; - char str[YAFFS_MAX_NAME_LENGTH+1]; + struct yaffs_obj *dir; + YCHAR *restOfPath; + YCHAR str[YAFFS_MAX_NAME_LENGTH+1]; int i; - + if(symDepth > YAFFSFS_MAX_SYMLINK_DEREFERENCES) - { return NULL; - } - - if(startDir) - { + + if(startDir){ dir = startDir; - restOfPath = (char *)path; + restOfPath = (YCHAR *)path; } else - { dir = yaffsfs_FindRoot(path,&restOfPath); - } - - while(dir) - { - // parse off /. - // curve ball: also throw away surplus '/' - // eg. "/ram/x////ff" gets treated the same as "/ram/x/ff" - while(*restOfPath == '/') - { - restOfPath++; // get rid of '/' - } - + + while(dir){ + /* + * parse off /. + * curve ball: also throw away surplus '/' + * eg. "/ram/x////ff" gets treated the same as "/ram/x/ff" + */ + while(yaffsfs_IsPathDivider(*restOfPath)) + restOfPath++; /* get rid of '/' */ + *name = restOfPath; i = 0; - - while(*restOfPath && *restOfPath != '/') - { - if (i < YAFFS_MAX_NAME_LENGTH) - { + + while(*restOfPath && !yaffsfs_IsPathDivider(*restOfPath)){ + if (i < YAFFS_MAX_NAME_LENGTH){ str[i] = *restOfPath; str[i+1] = '\0'; i++; } restOfPath++; } - + if(!*restOfPath) - { - // got to the end of the string + /* got to the end of the string */ return dir; - } - else - { - if(strcmp(str,".") == 0) + else{ + if(yaffs_strcmp(str,_Y(".")) == 0) { - // Do nothing + /* Do nothing */ } - else if(strcmp(str,"..") == 0) - { + else if(yaffs_strcmp(str,_Y("..")) == 0) dir = dir->parent; - } - else - { - dir = yaffs_FindObjectByName(dir,str); - - while(dir && dir->variantType == YAFFS_OBJECT_TYPE_SYMLINK) - { - - dir = yaffsfs_FollowLink(dir,symDepth); - - } - - if(dir && dir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) - { + else{ + dir = yaffs_find_by_name(dir,str); + + dir = yaffsfs_FollowLink(dir,symDepth); + + if(dir && dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) dir = NULL; - } } } } - // directory did not exist. + /* directory did not exist. */ return NULL; } -static yaffs_Object *yaffsfs_FindDirectory(yaffs_Object *relativeDirectory,const char *path,char **name,int symDepth) +static struct yaffs_obj *yaffsfs_FindDirectory(struct yaffs_obj *relativeDirectory, + const YCHAR *path,YCHAR **name,int symDepth) { return yaffsfs_DoFindDirectory(relativeDirectory,path,name,symDepth); } -// yaffsfs_FindObject turns a path for an existing object into the object -// -static yaffs_Object *yaffsfs_FindObject(yaffs_Object *relativeDirectory, const char *path,int symDepth) +/* + * yaffsfs_FindObject turns a path for an existing object into the object + */ +static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relativeDirectory, const YCHAR *path,int symDepth, int getEquiv) { - yaffs_Object *dir; - char *name; - + struct yaffs_obj *dir; + struct yaffs_obj *obj; + YCHAR *name; + dir = yaffsfs_FindDirectory(relativeDirectory,path,&name,symDepth); - + if(dir && *name) - { - return yaffs_FindObjectByName(dir,name); + obj = yaffs_find_by_name(dir,name); + else + obj = dir; + + if(getEquiv) + obj = yaffs_get_equivalent_obj(obj); + + return obj; +} + + +int yaffs_dup(int fd) +{ + int newHandle = -1; + yaffsfs_Handle *oldPtr = NULL; + yaffsfs_Handle *newPtr = NULL; + + yaffsfs_Lock(); + + oldPtr = yaffsfs_GetHandlePointer(fd); + if(oldPtr && oldPtr->useCount > 0) + newHandle = yaffsfs_GetNewHandle(); + if(newHandle >= 0) + newPtr = yaffsfs_GetHandlePointer(newHandle); + + if(newPtr){ + *newPtr = *oldPtr; + return newHandle; } - - return dir; + + if(!oldPtr) + yaffsfs_SetError(-EBADF); + else + yaffsfs_SetError(-ENOMEM); + + return -1; + } -int yaffs_open(const char *path, int oflag, int mode) +int yaffs_open_sharing(const YCHAR *path, int oflag, int mode, int sharing) { - yaffs_Object *obj = NULL; - yaffs_Object *dir = NULL; - char *name; + struct yaffs_obj *obj = NULL; + struct yaffs_obj *dir = NULL; + YCHAR *name; int handle = -1; - yaffsfs_Handle *h = NULL; - int alreadyOpen = 0; - int alreadyExclusive = 0; + yaffsfs_Handle *yh = NULL; int openDenied = 0; int symDepth = 0; int errorReported = 0; - - int i; - - - // todo sanity check oflag (eg. can't have O_TRUNC without WRONLY or RDWR - - + int rwflags = oflag & ( O_RDWR | O_RDONLY | O_WRONLY); + u8 shareRead = (sharing & YAFFS_SHARE_READ) ? 1 : 0; + u8 shareWrite = (sharing & YAFFS_SHARE_WRITE) ? 1 : 0; + u8 sharedReadAllowed; + u8 sharedWriteAllowed; + u8 alreadyReading; + u8 alreadyWriting; + u8 readRequested; + u8 writeRequested; + + /* O_EXCL only has meaning if O_CREAT is specified */ + if(!(oflag & O_CREAT)) + oflag &= ~(O_EXCL); + + /* O_TRUNC has no meaning if (O_CREAT | O_EXCL) is specified */ + if( (oflag & O_CREAT) & (oflag & O_EXCL)) + oflag &= ~(O_TRUNC); + + /* Todo: Are there any more flag combos to sanitise ? */ + + /* Figure out if reading or writing is requested */ + + readRequested = (rwflags == O_RDWR || rwflags == O_RDONLY) ? 1 : 0; + writeRequested = (rwflags == O_RDWR || rwflags == O_WRONLY) ? 1 : 0; + yaffsfs_Lock(); - - handle = yaffsfs_GetHandle(); - - if(handle >= 0) - { - h = yaffsfs_GetHandlePointer(handle); - - - // try to find the exisiting object - obj = yaffsfs_FindObject(NULL,path,0); - - if(obj && obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) - { - - obj = yaffsfs_FollowLink(obj,symDepth++); - } + handle = yaffsfs_GetNewHandle(); - if(obj) - { - // Check if the object is already in use - alreadyOpen = alreadyExclusive = 0; - - for(i = 0; i <= YAFFSFS_N_HANDLES; i++) - { - - if(i != handle && - yaffsfs_handle[i].inUse && - obj == yaffsfs_handle[i].obj) - { - alreadyOpen = 1; - if(yaffsfs_handle[i].exclusive) - { - alreadyExclusive = 1; - } - } - } + if(handle < 0){ + yaffsfs_SetError(-ENFILE); + errorReported = 1; + } else { - if(((oflag & O_EXCL) && alreadyOpen) || alreadyExclusive) - { + yh = yaffsfs_GetHandlePointer(handle); + + /* try to find the exisiting object */ + obj = yaffsfs_FindObject(NULL,path,0,1); + + obj = yaffsfs_FollowLink(obj,symDepth++); + + if(obj && + obj->variant_type != YAFFS_OBJECT_TYPE_FILE && + obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) + obj = NULL; + + + if(obj){ + + /* The file already exists or it might be a directory */ + + /* If it is a directory then we can't open it as a file */ + if(obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY){ openDenied = 1; + yaffsfs_SetError(-EISDIR); + errorReported = 1; } - - // Open should fail if O_CREAT and O_EXCL are specified - if((oflag & O_EXCL) && (oflag & O_CREAT)) - { + + /* Open should fail if O_CREAT and O_EXCL are specified since + * the file exists + */ + if(!errorReported && (oflag & O_EXCL) && (oflag & O_CREAT)){ openDenied = 1; yaffsfs_SetError(-EEXIST); errorReported = 1; } - - // Check file permissions - if( (oflag & (O_RDWR | O_WRONLY)) == 0 && // ie O_RDONLY - !(obj->st_mode & S_IREAD)) - { + + /* Check file permissions */ + if( readRequested && !(obj->yst_mode & S_IREAD)) openDenied = 1; - } - if( (oflag & O_RDWR) && - !(obj->st_mode & S_IREAD)) - { + if( writeRequested && !(obj->yst_mode & S_IWRITE)) openDenied = 1; + + if(openDenied && !errorReported ) { + /* Error if the file exists but permissions are refused. */ + yaffsfs_SetError(-EACCES); + errorReported = 1; } - if( (oflag & (O_RDWR | O_WRONLY)) && - !(obj->st_mode & S_IWRITE)) - { - openDenied = 1; + /* Check sharing of an existing object. */ + if(!openDenied){ + yaffsfs_Handle *hx; + int i; + sharedReadAllowed = 1; + sharedWriteAllowed = 1; + alreadyReading = 0; + alreadyWriting = 0; + for( i = 0; i < YAFFSFS_N_HANDLES; i++){ + hx = &yaffsfs_handle[i]; + if(hx->useCount > 0 && + hx->inodeId >= 0 && + yaffsfs_inode[hx->inodeId].iObj == obj){ + if(!hx->shareRead) + sharedReadAllowed = 0; + if(!hx->shareWrite) + sharedWriteAllowed = 0; + if(hx->reading) + alreadyReading = 1; + if(hx->writing) + alreadyWriting = 1; + } + } + + + + if((!sharedReadAllowed && readRequested)|| + (!shareRead && alreadyReading) || + (!sharedWriteAllowed && writeRequested) || + (!shareWrite && alreadyWriting)){ + openDenied = 1; + yaffsfs_SetError(-EBUSY); + errorReported=1; + } } - + } - - else if((oflag & O_CREAT)) - { - // Let's see if we can create this file + + /* If we could not open an existing object, then let's see if + * the directory exists. If not, error. + */ + if(!obj && !errorReported){ dir = yaffsfs_FindDirectory(NULL,path,&name,0); - if(dir) - { - obj = yaffs_MknodFile(dir,name,mode,0,0); - } - else - { + if(!dir){ yaffsfs_SetError(-ENOTDIR); + errorReported = 1; } } - - if(obj && !openDenied) - { - h->obj = obj; - h->inUse = 1; - h->readOnly = (oflag & (O_WRONLY | O_RDWR)) ? 0 : 1; - h->append = (oflag & O_APPEND) ? 1 : 0; - h->exclusive = (oflag & O_EXCL) ? 1 : 0; - h->position = 0; - - obj->inUse++; - if((oflag & O_TRUNC) && !h->readOnly) - { - //todo truncate - yaffs_ResizeFile(obj,0); + + if(!obj && dir && !errorReported && (oflag & O_CREAT)) { + /* Let's see if we can create this file if it does not exist. */ + if(dir->my_dev->read_only){ + yaffsfs_SetError(-EINVAL); + errorReported = 1; + } else + obj = yaffs_create_file(dir,name,mode,0,0); + + if(!obj && !errorReported){ + yaffsfs_SetError(-ENOSPC); + errorReported = 1; } - } - else - { - yaffsfs_PutHandle(handle); - if(!errorReported) - { - yaffsfs_SetError(-EACCESS); - errorReported = 1; + + if(!obj && dir && !errorReported && !(oflag & O_CREAT)) { + /* Error if the file does not exist and CREAT is not set. */ + yaffsfs_SetError(-ENOENT); + errorReported = 1; + } + + if(obj && !openDenied) { + int inodeId = yaffsfs_GetInodeIdForObject(obj); + + if(inodeId<0) { + /* + * Todo: Fix any problem if inodes run out, though that + * can't happen if the number of inode items >= number of handles. + */ } + + yh->inodeId = inodeId; + yh->reading = readRequested; + yh->writing = writeRequested; + yh->append = (oflag & O_APPEND) ? 1 : 0; + yh->position = 0; + yh->shareRead = shareRead; + yh->shareWrite = shareWrite; + + /* Hook inode to object */ + obj->my_inode = (void*) &yaffsfs_inode[inodeId]; + + if((oflag & O_TRUNC) && yh->writing) + yaffs_resize_file(obj,0); + } else { + yaffsfs_PutHandle(handle); + if(!errorReported) + yaffsfs_SetError(0); /* Problem */ handle = -1; } - } - + yaffsfs_Unlock(); - - return handle; + + return handle; +} + +int yaffs_open(const YCHAR *path, int oflag, int mode) +{ + return yaffs_open_sharing(path, oflag, mode, YAFFS_SHARE_READ | YAFFS_SHARE_WRITE); +} + +int yaffs_Dofsync(int fd,int datasync) +{ + yaffsfs_Handle *h = NULL; + int retVal = 0; + + yaffsfs_Lock(); + + h = yaffsfs_GetHandlePointer(fd); + + if(h && h->useCount > 0) + /* flush the file */ + yaffs_flush_file(yaffsfs_inode[h->inodeId].iObj,1,datasync); + else { + /* bad handle */ + yaffsfs_SetError(-EBADF); + retVal = -1; + } + + yaffsfs_Unlock(); + + return retVal; +} + +int yaffs_fsync(int fd) +{ + return yaffs_Dofsync(fd,0); +} + +int yaffs_flush(int fd) +{ + return yaffs_fsync(fd); +} + +int yaffs_fdatasync(int fd) +{ + return yaffs_Dofsync(fd,1); } int yaffs_close(int fd) { yaffsfs_Handle *h = NULL; int retVal = 0; - + yaffsfs_Lock(); h = yaffsfs_GetHandlePointer(fd); - - if(h && h->inUse) - { - // clean up - yaffs_FlushFile(h->obj,1); - h->obj->inUse--; - if(h->obj->inUse <= 0 && h->obj->unlinked) - { - yaffs_DeleteFile(h->obj); - } + + if(h && h->useCount > 0) { + /* clean up */ + yaffs_flush_file(yaffsfs_inode[h->inodeId].iObj,1,0); yaffsfs_PutHandle(fd); retVal = 0; - } - else - { - // bad handle - yaffsfs_SetError(-EBADF); + } else { + /* bad handle */ + yaffsfs_SetError(-EBADF); retVal = -1; } - + yaffsfs_Unlock(); - + return retVal; } -int yaffs_read(int fd, void *buf, unsigned int nbyte) + + +int yaffsfs_do_read(int fd, void *vbuf, unsigned int nbyte, int isPread, int offset) { yaffsfs_Handle *h = NULL; - yaffs_Object *obj = NULL; + struct yaffs_obj *obj = NULL; int pos = 0; - int nRead = -1; - int maxRead; - + int startPos = 0; + int nRead = 0; + int nToRead = 0; + int totalRead = 0; + unsigned int maxRead; + u8 *buf = (u8 *)vbuf; + yaffsfs_Lock(); h = yaffsfs_GetHandlePointer(fd); obj = yaffsfs_GetHandleObject(fd); - - if(!h || !obj) - { - // bad handle - yaffsfs_SetError(-EBADF); - } - else if( h && obj) - { - pos= h->position; - if(yaffs_GetObjectFileLength(obj) > pos) - { - maxRead = yaffs_GetObjectFileLength(obj) - pos; - } + + if(!h || !obj){ + /* bad handle */ + yaffsfs_SetError(-EBADF); + totalRead = -1; + } else if(!h->reading){ + /* Not a reading handle */ + yaffsfs_SetError(-EINVAL); + totalRead = -1; + } else { + if(isPread) + startPos = offset; + else + startPos = h->position; + + pos = startPos; + + if(yaffs_get_obj_length(obj) > pos) + maxRead = yaffs_get_obj_length(obj) - pos; else - { maxRead = 0; - } if(nbyte > maxRead) - { nbyte = maxRead; - } - - if(nbyte > 0) - { - nRead = yaffs_ReadDataFromFile(obj,buf,pos,nbyte); - if(nRead >= 0) - { - h->position = pos + nRead; + + yaffsfs_GetHandle(fd); + + while(nbyte > 0) { + nToRead = YAFFSFS_RW_SIZE - (pos & (YAFFSFS_RW_SIZE -1)); + if(nToRead > nbyte) + nToRead = nbyte; + nRead = yaffs_file_rd(obj,buf,pos,nToRead); + + if(nRead > 0){ + totalRead += nRead; + pos += nRead; + buf += nRead; } + + if(nRead == nToRead) + nbyte-=nRead; else - { - //todo error + nbyte = 0; /* no more to read */ + + + if(nbyte > 0){ + yaffsfs_Unlock(); + yaffsfs_Lock(); } + } - else - { - nRead = 0; + + yaffsfs_PutHandle(fd); + + if(!isPread) { + if(totalRead >= 0) + h->position = startPos + totalRead; + else { + /* todo error */ + } } - + } - + yaffsfs_Unlock(); - - - return (nRead >= 0) ? nRead : -1; - + + return (totalRead >= 0) ? totalRead : -1; + } -int yaffs_write(int fd, const void *buf, unsigned int nbyte) +int yaffs_read(int fd, void *buf, unsigned int nbyte) +{ + return yaffsfs_do_read(fd, buf, nbyte, 0, 0); +} + +int yaffs_pread(int fd, void *buf, unsigned int nbyte, unsigned int offset) +{ + return yaffsfs_do_read(fd, buf, nbyte, 1, offset); +} + +int yaffsfs_do_write(int fd, const void *vbuf, unsigned int nbyte, int isPwrite, int offset) { yaffsfs_Handle *h = NULL; - yaffs_Object *obj = NULL; + struct yaffs_obj *obj = NULL; int pos = 0; - int nWritten = -1; - + int startPos = 0; + int nWritten = 0; + int totalWritten = 0; + int write_trhrough = 0; + int nToWrite = 0; + const u8 *buf = (const u8 *)vbuf; + yaffsfs_Lock(); h = yaffsfs_GetHandlePointer(fd); obj = yaffsfs_GetHandleObject(fd); - - if(!h || !obj) - { - // bad handle - yaffsfs_SetError(-EBADF); - } - else if( h && obj && h->readOnly) - { - // todo error - } - else if( h && obj) - { + + if(!h || !obj){ + /* bad handle */ + yaffsfs_SetError(-EBADF); + totalWritten = -1; + } else if( h && obj && (!h->writing || obj->my_dev->read_only)){ + yaffsfs_SetError(-EINVAL); + totalWritten=-1; + } else { if(h->append) - { - pos = yaffs_GetObjectFileLength(obj); - } + startPos = yaffs_get_obj_length(obj); + else if(isPwrite) + startPos = offset; else - { - pos = h->position; - } - - nWritten = yaffs_WriteDataToFile(obj,buf,pos,nbyte); - - if(nWritten >= 0) - { - h->position = pos + nWritten; + startPos = h->position; + + yaffsfs_GetHandle(fd); + pos = startPos; + while(nbyte > 0) { + nToWrite = YAFFSFS_RW_SIZE - (pos & (YAFFSFS_RW_SIZE -1)); + if(nToWrite > nbyte) + nToWrite = nbyte; + + nWritten = yaffs_wr_file(obj,buf,pos,nToWrite,write_trhrough); + if(nWritten > 0){ + totalWritten += nWritten; + pos += nWritten; + buf += nWritten; + } + + if(nWritten == nToWrite) + nbyte -= nToWrite; + else + nbyte = 0; + + if(nWritten < 1 && totalWritten < 1){ + yaffsfs_SetError(-ENOSPC); + totalWritten = -1; + } + + if(nbyte > 0){ + yaffsfs_Unlock(); + yaffsfs_Lock(); + } } - else - { - //todo error + + yaffsfs_PutHandle(fd); + + if(!isPwrite){ + if(totalWritten > 0) + h->position = startPos + totalWritten; + else { + /* todo error */ + } } - } - + + yaffsfs_Unlock(); + + return (totalWritten >= 0) ? totalWritten : -1; +} + +int yaffs_write(int fd, const void *buf, unsigned int nbyte) +{ + return yaffsfs_do_write(fd, buf, nbyte, 0, 0); +} + +int yaffs_pwrite(int fd, const void *buf, unsigned int nbyte, unsigned int offset) +{ + return yaffsfs_do_write(fd, buf, nbyte, 1, offset); +} + + +int yaffs_truncate(const YCHAR *path,off_t new_size) +{ + struct yaffs_obj *obj = NULL; + int result = YAFFS_FAIL; + + yaffsfs_Lock(); + + obj = yaffsfs_FindObject(NULL,path,0,1); + + if(!obj) + yaffsfs_SetError(-ENOENT); + else if(obj->variant_type != YAFFS_OBJECT_TYPE_FILE) + yaffsfs_SetError(-EISDIR); + else if(obj->my_dev->read_only) + yaffsfs_SetError(-EINVAL); + else + result = yaffs_resize_file(obj,new_size); + yaffsfs_Unlock(); - - - return (nWritten >= 0) ? nWritten : -1; + + return (result) ? 0 : -1; } -int yaffs_truncate(int fd, unsigned int newSize) +int yaffs_ftruncate(int fd, off_t new_size) { yaffsfs_Handle *h = NULL; - yaffs_Object *obj = NULL; + struct yaffs_obj *obj = NULL; int result = 0; - + yaffsfs_Lock(); h = yaffsfs_GetHandlePointer(fd); obj = yaffsfs_GetHandleObject(fd); - + if(!h || !obj) - { - // bad handle - yaffsfs_SetError(-EBADF); - } + /* bad handle */ + yaffsfs_SetError(-EBADF); + else if(obj->my_dev->read_only) + yaffsfs_SetError(-EINVAL); else - { - // resize the file - result = yaffs_ResizeFile(obj,newSize); - } + /* resize the file */ + result = yaffs_resize_file(obj,new_size); yaffsfs_Unlock(); - - + + return (result) ? 0 : -1; } -off_t yaffs_lseek(int fd, off_t offset, int whence) +off_t yaffs_lseek(int fd, off_t offset, int whence) { yaffsfs_Handle *h = NULL; - yaffs_Object *obj = NULL; + struct yaffs_obj *obj = NULL; int pos = -1; int fSize = -1; - + yaffsfs_Lock(); h = yaffsfs_GetHandlePointer(fd); obj = yaffsfs_GetHandleObject(fd); - - if(!h || !obj) - { - // bad handle - yaffsfs_SetError(-EBADF); - } - else if(whence == SEEK_SET) - { - if(offset >= 0) - { - pos = offset; - } - } - else if(whence == SEEK_CUR) - { - if( (h->position + offset) >= 0) - { - pos = (h->position + offset); - } - } - else if(whence == SEEK_END) - { - fSize = yaffs_GetObjectFileLength(obj); - if(fSize >= 0 && (fSize + offset) >= 0) - { - pos = fSize + offset; - } - } - - if(pos >= 0) - { - h->position = pos; - } - else - { - // todo error + + if(!h || !obj){ + /* bad handle */ + yaffsfs_SetError(-EBADF); + } else { + if(whence == SEEK_SET){ + if(offset >= 0) + pos = offset; + } else if(whence == SEEK_CUR) { + if( (h->position + offset) >= 0) + pos = (h->position + offset); + } else if(whence == SEEK_END) { + fSize = yaffs_get_obj_length(obj); + if(fSize >= 0 && (fSize + offset) >= 0) + pos = fSize + offset; + } + + if(pos >= 0) + h->position = pos; + else + yaffsfs_SetError(-EINVAL); } - yaffsfs_Unlock(); - + return pos; } -int yaffsfs_DoUnlink(const char *path,int isDirectory) +int yaffsfs_DoUnlink(const YCHAR *path,int isDirectory) { - yaffs_Object *dir = NULL; - yaffs_Object *obj = NULL; - char *name; + struct yaffs_obj *dir = NULL; + struct yaffs_obj *obj = NULL; + YCHAR *name; int result = YAFFS_FAIL; - + yaffsfs_Lock(); - obj = yaffsfs_FindObject(NULL,path,0); + obj = yaffsfs_FindObject(NULL,path,0,0); dir = yaffsfs_FindDirectory(NULL,path,&name,0); if(!dir) - { yaffsfs_SetError(-ENOTDIR); - } else if(!obj) - { yaffsfs_SetError(-ENOENT); - } - else if(!isDirectory && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) - { + else if(obj->my_dev->read_only) + yaffsfs_SetError(-EINVAL); + else if(!isDirectory && obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) yaffsfs_SetError(-EISDIR); - } - else if(isDirectory && obj->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) - { - yaffsfs_SetError(-ENOTDIR); - } - else if(isDirectory && obj->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) - { + else if(isDirectory && obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) yaffsfs_SetError(-ENOTDIR); - } - else - { - result = yaffs_Unlink(dir,name); - + else { + result = yaffs_unlinker(dir,name); + if(result == YAFFS_FAIL && isDirectory) - { yaffsfs_SetError(-ENOTEMPTY); - } } - + yaffsfs_Unlock(); - - // todo error - + + /* todo error */ + return (result == YAFFS_FAIL) ? -1 : 0; } -int yaffs_rmdir(const char *path) + + +int yaffs_rmdir(const YCHAR *path) { return yaffsfs_DoUnlink(path,1); } -int yaffs_unlink(const char *path) +int yaffs_unlink(const YCHAR *path) { return yaffsfs_DoUnlink(path,0); } -int yaffs_rename(const char *oldPath, const char *newPath) +int yaffs_rename(const YCHAR *oldPath, const YCHAR *newPath) { - yaffs_Object *olddir = NULL; - yaffs_Object *newdir = NULL; - yaffs_Object *obj = NULL; - char *oldname; - char *newname; + struct yaffs_obj *olddir = NULL; + struct yaffs_obj *newdir = NULL; + struct yaffs_obj *obj = NULL; + YCHAR *oldname; + YCHAR *newname; int result= YAFFS_FAIL; - int renameAllowed = 1; - + int rename_allowed = 1; + yaffsfs_Lock(); - + olddir = yaffsfs_FindDirectory(NULL,oldPath,&oldname,0); newdir = yaffsfs_FindDirectory(NULL,newPath,&newname,0); - obj = yaffsfs_FindObject(NULL,oldPath,0); - - if(!olddir || !newdir || !obj) - { - // bad file - yaffsfs_SetError(-EBADF); - renameAllowed = 0; - } - else if(olddir->myDev != newdir->myDev) - { - // oops must be on same device - // todo error + obj = yaffsfs_FindObject(NULL,oldPath,0,0); + + if(!olddir || !newdir || !obj) { + /* bad file */ + yaffsfs_SetError(-EBADF); + rename_allowed = 0; + } else if(obj->my_dev->read_only){ + yaffsfs_SetError(-EINVAL); + rename_allowed = 0; + } else if(olddir->my_dev != newdir->my_dev) { + /* oops must be on same device */ + /* todo error */ yaffsfs_SetError(-EXDEV); - renameAllowed = 0; - } - else if(obj && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) - { - // It is a directory, check that it is not being renamed to - // being its own decendent. - // Do this by tracing from the new directory back to the root, checking for obj - - yaffs_Object *xx = newdir; - - while( renameAllowed && xx) - { + rename_allowed = 0; + } else if(obj && obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) { + /* + * It is a directory, check that it is not being renamed to + * being its own decendent. + * Do this by tracing from the new directory back to the root, checking for obj + */ + + struct yaffs_obj *xx = newdir; + + while( rename_allowed && xx){ if(xx == obj) - { - renameAllowed = 0; - } + rename_allowed = 0; xx = xx->parent; } - if(!renameAllowed) yaffsfs_SetError(-EACCESS); - } - - if(renameAllowed) - { - result = yaffs_RenameObject(olddir,oldname,newdir,newname); + if(!rename_allowed) + yaffsfs_SetError(-EACCES); } - + + if(rename_allowed) + result = yaffs_rename_obj(olddir,oldname,newdir,newname); + yaffsfs_Unlock(); - - return (result == YAFFS_FAIL) ? -1 : 0; + + return (result == YAFFS_FAIL) ? -1 : 0; } -static int yaffsfs_DoStat(yaffs_Object *obj,struct yaffs_stat *buf) +static int yaffsfs_DoStat(struct yaffs_obj *obj,struct yaffs_stat *buf) { int retVal = -1; - if(obj) - { - obj = yaffs_GetEquivalentObject(obj); - } + obj = yaffs_get_equivalent_obj(obj); - if(obj && buf) - { - buf->st_dev = (int)obj->myDev->genericDevice; - buf->st_ino = obj->objectId; - buf->st_mode = obj->st_mode & ~S_IFMT; // clear out file type bits - - if(obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) - { + if(obj && buf){ + buf->st_dev = (int)obj->my_dev->os_context; + buf->st_ino = obj->obj_id; + buf->st_mode = obj->yst_mode & ~S_IFMT; /* clear out file type bits */ + + if(obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) buf->st_mode |= S_IFDIR; - } - else if(obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) - { + else if(obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) buf->st_mode |= S_IFLNK; - } - else if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) - { + else if(obj->variant_type == YAFFS_OBJECT_TYPE_FILE) buf->st_mode |= S_IFREG; - } - - buf->st_nlink = yaffs_GetObjectLinkCount(obj); - buf->st_uid = 0; - buf->st_gid = 0;; - buf->st_rdev = obj->st_rdev; - buf->st_size = yaffs_GetObjectFileLength(obj); - buf->st_blksize = obj->myDev->nBytesPerChunk; - buf->st_blocks = (buf->st_size + buf->st_blksize -1)/buf->st_blksize; - buf->st_atime = obj->st_atime; - buf->st_ctime = obj->st_ctime; - buf->st_mtime = obj->st_mtime; + + buf->st_nlink = yaffs_get_obj_link_count(obj); + buf->st_uid = 0; + buf->st_gid = 0;; + buf->st_rdev = obj->yst_rdev; + buf->st_size = yaffs_get_obj_length(obj); + buf->st_blksize = obj->my_dev->data_bytes_per_chunk; + buf->st_blocks = (buf->st_size + buf->st_blksize -1)/buf->st_blksize; +#if CONFIG_YAFFS_WINCE + buf->yst_wince_atime[0] = obj->win_atime[0]; + buf->yst_wince_atime[1] = obj->win_atime[1]; + buf->yst_wince_ctime[0] = obj->win_ctime[0]; + buf->yst_wince_ctime[1] = obj->win_ctime[1]; + buf->yst_wince_mtime[0] = obj->win_mtime[0]; + buf->yst_wince_mtime[1] = obj->win_mtime[1]; +#else + buf->yst_atime = obj->yst_atime; + buf->yst_ctime = obj->yst_ctime; + buf->yst_mtime = obj->yst_mtime; +#endif retVal = 0; } return retVal; } -static int yaffsfs_DoStatOrLStat(const char *path, struct yaffs_stat *buf,int doLStat) +static int yaffsfs_DoStatOrLStat(const YCHAR *path, struct yaffs_stat *buf,int doLStat) { - yaffs_Object *obj; - + struct yaffs_obj *obj; + int retVal = -1; - + yaffsfs_Lock(); - obj = yaffsfs_FindObject(NULL,path,0); - + + obj = yaffsfs_FindObject(NULL,path,0,1); + if(!doLStat && obj) - { obj = yaffsfs_FollowLink(obj,0); - } - + if(obj) - { retVal = yaffsfs_DoStat(obj,buf); - } else - { - // todo error not found + /* todo error not found */ yaffsfs_SetError(-ENOENT); - } - + yaffsfs_Unlock(); - + return retVal; - + } -int yaffs_stat(const char *path, struct yaffs_stat *buf) +int yaffs_stat(const YCHAR *path, struct yaffs_stat *buf) { return yaffsfs_DoStatOrLStat(path,buf,0); } -int yaffs_lstat(const char *path, struct yaffs_stat *buf) +int yaffs_lstat(const YCHAR *path, struct yaffs_stat *buf) { return yaffsfs_DoStatOrLStat(path,buf,1); } int yaffs_fstat(int fd, struct yaffs_stat *buf) { - yaffs_Object *obj; - + struct yaffs_obj *obj; + int retVal = -1; - + yaffsfs_Lock(); obj = yaffsfs_GetHandleObject(fd); - + if(obj) - { retVal = yaffsfs_DoStat(obj,buf); - } else - { - // bad handle + /* bad handle */ + yaffsfs_SetError(-EBADF); + + yaffsfs_Unlock(); + + return retVal; +} + +#ifndef CONFIG_YAFFS_WINCE +/* xattrib functions */ + + +static int yaffs_do_setxattr(const YCHAR *path, const char *name, const void *data, int size, int flags, int follow) +{ + struct yaffs_obj *obj; + + int retVal = -1; + + yaffsfs_Lock(); + + obj = yaffsfs_FindObject(NULL,path,0,1); + + if(follow) + obj = yaffsfs_FollowLink(obj,0); + + if(obj) { + retVal = yaffs_set_xattrib(obj,name,data,size,flags); + if(retVal< 0){ + yaffsfs_SetError(retVal); + retVal = -1; + } + } else + /* todo error not found */ + yaffsfs_SetError(-ENOENT); + + yaffsfs_Unlock(); + + return retVal; + +} + +int yaffs_setxattr(const YCHAR *path, const char *name, const void *data, int size, int flags) +{ + return yaffs_do_setxattr(path, name, data, size, flags, 1); +} + +int yaffs_lsetxattr(const YCHAR *path, const char *name, const void *data, int size, int flags) +{ + return yaffs_do_setxattr(path, name, data, size, flags, 0); +} + + + +int yaffs_fsetxattr(int fd, const char *name, const void *data, int size, int flags) +{ + struct yaffs_obj *obj; + + int retVal = -1; + + yaffsfs_Lock(); + obj = yaffsfs_GetHandleObject(fd); + + if(obj) { + retVal = yaffs_set_xattrib(obj,name,data,size,flags); + if(retVal< 0){ + yaffsfs_SetError(retVal); + retVal = -1; + } + } else + /* bad handle */ + yaffsfs_SetError(-EBADF); + + yaffsfs_Unlock(); + + return retVal; +} + +static int yaffs_do_getxattr(const YCHAR *path, const char *name, void *data, int size, int follow) +{ + struct yaffs_obj *obj; + + int retVal = -1; + + yaffsfs_Lock(); + + obj = yaffsfs_FindObject(NULL,path,0,1); + + if(follow) + obj = yaffsfs_FollowLink(obj,0); + + if(obj) { + retVal = yaffs_get_xattrib(obj,name,data,size); + if(retVal< 0){ + yaffsfs_SetError(retVal); + retVal = -1; + } + } else + /* todo error not found */ + yaffsfs_SetError(-ENOENT); + + yaffsfs_Unlock(); + + return retVal; + +} + +int yaffs_getxattr(const YCHAR *path, const char *name, void *data, int size) +{ + return yaffs_do_getxattr( path, name, data, size, 1); +} +int yaffs_lgetxattr(const YCHAR *path, const char *name, void *data, int size) +{ + return yaffs_do_getxattr( path, name, data, size, 0); +} + + + +int yaffs_fgetxattr(int fd, const char *name, void *data, int size) +{ + struct yaffs_obj *obj; + + int retVal = -1; + + yaffsfs_Lock(); + obj = yaffsfs_GetHandleObject(fd); + + if(obj) { + retVal = yaffs_get_xattrib(obj,name,data,size); + if(retVal< 0){ + yaffsfs_SetError(retVal); + retVal = -1; + } + } else + /* bad handle */ + yaffsfs_SetError(-EBADF); + + yaffsfs_Unlock(); + + return retVal; +} + +static int yaffs_do_listxattr(const YCHAR *path, char *data, int size, int follow) +{ + struct yaffs_obj *obj; + + int retVal = -1; + + yaffsfs_Lock(); + + obj = yaffsfs_FindObject(NULL,path,0,1); + + if(follow) + obj = yaffsfs_FollowLink(obj,0); + + if(obj) { + retVal = yaffs_list_xattrib(obj, data,size); + if(retVal< 0){ + yaffsfs_SetError(retVal); + retVal = -1; + } + } else + /* todo error not found */ + yaffsfs_SetError(-ENOENT); + + yaffsfs_Unlock(); + + return retVal; + +} + +int yaffs_listxattr(const YCHAR *path, char *data, int size) +{ + return yaffs_do_listxattr(path, data, size, 1); +} + +int yaffs_llistxattr(const YCHAR *path, char *data, int size) +{ + return yaffs_do_listxattr(path, data, size, 0); +} + +int yaffs_flistxattr(int fd, char *data, int size) +{ + struct yaffs_obj *obj; + + int retVal = -1; + + yaffsfs_Lock(); + obj = yaffsfs_GetHandleObject(fd); + + if(obj) { + retVal = yaffs_list_xattrib(obj,data,size); + if(retVal< 0){ + yaffsfs_SetError(retVal); + retVal = -1; + } + } else + /* bad handle */ + yaffsfs_SetError(-EBADF); + + yaffsfs_Unlock(); + + return retVal; +} + +static int yaffs_do_removexattr(const YCHAR *path, const char *name, int follow) +{ + struct yaffs_obj *obj; + + int retVal = -1; + + yaffsfs_Lock(); + + obj = yaffsfs_FindObject(NULL,path,0,1); + + if(follow) + obj = yaffsfs_FollowLink(obj,0); + + if(obj) { + retVal = yaffs_remove_xattrib(obj,name); + if(retVal< 0){ + yaffsfs_SetError(retVal); + retVal = -1; + } + } else + /* todo error not found */ + yaffsfs_SetError(-ENOENT); + + yaffsfs_Unlock(); + + return retVal; + +} + +int yaffs_removexattr(const YCHAR *path, const char *name) +{ + return yaffs_do_removexattr(path, name, 1); +} + +int yaffs_lremovexattr(const YCHAR *path, const char *name) +{ + return yaffs_do_removexattr(path, name, 0); +} + +int yaffs_fremovexattr(int fd, const char *name) +{ + struct yaffs_obj *obj; + + int retVal = -1; + + yaffsfs_Lock(); + obj = yaffsfs_GetHandleObject(fd); + + if(obj){ + retVal = yaffs_remove_xattrib(obj,name); + if(retVal< 0){ + yaffsfs_SetError(retVal); + retVal = -1; + } + }else + /* bad handle */ + yaffsfs_SetError(-EBADF); + + yaffsfs_Unlock(); + + return retVal; +} +#endif + +#ifdef CONFIG_YAFFS_WINCE +int yaffs_get_wince_times(int fd, unsigned *wctime, unsigned *watime, unsigned *wmtime) +{ + struct yaffs_obj *obj; + + int retVal = -1; + + yaffsfs_Lock(); + obj = yaffsfs_GetHandleObject(fd); + + if(obj){ + + if(wctime){ + wctime[0] = obj->win_ctime[0]; + wctime[1] = obj->win_ctime[1]; + } + if(watime){ + watime[0] = obj->win_atime[0]; + watime[1] = obj->win_atime[1]; + } + if(wmtime){ + wmtime[0] = obj->win_mtime[0]; + wmtime[1] = obj->win_mtime[1]; + } + + + retVal = 0; + } else + /* bad handle */ yaffsfs_SetError(-EBADF); - } yaffsfs_Unlock(); return retVal; } -static int yaffsfs_DoChMod(yaffs_Object *obj,mode_t mode) + +int yaffs_set_wince_times(int fd, + const unsigned *wctime, + const unsigned *watime, + const unsigned *wmtime) { - int result; + struct yaffs_obj *obj; + int result; + int retVal = -1; + + yaffsfs_Lock(); + obj = yaffsfs_GetHandleObject(fd); + + if(obj){ + + if(wctime){ + obj->win_ctime[0] = wctime[0]; + obj->win_ctime[1] = wctime[1]; + } + if(watime){ + obj->win_atime[0] = watime[0]; + obj->win_atime[1] = watime[1]; + } + if(wmtime){ + obj->win_mtime[0] = wmtime[0]; + obj->win_mtime[1] = wmtime[1]; + } + + obj->dirty = 1; + result = yaffs_flush_file(obj,0,0); + retVal = 0; + } else + /* bad handle */ + yaffsfs_SetError(-EBADF); + + yaffsfs_Unlock(); + + return retVal; +} + +#endif + + +static int yaffsfs_DoChMod(struct yaffs_obj *obj,mode_t mode) +{ + int result = -1; if(obj) - { - obj = yaffs_GetEquivalentObject(obj); - } - - if(obj) - { - obj->st_mode = mode; + obj = yaffs_get_equivalent_obj(obj); + + if(obj) { + obj->yst_mode = mode; obj->dirty = 1; - result = yaffs_FlushFile(obj,0); + result = yaffs_flush_file(obj,0,0); } - + return result == YAFFS_OK ? 0 : -1; } -int yaffs_chmod(const char *path, mode_t mode) +int yaffs_access(const YCHAR *path, int amode) { - yaffs_Object *obj; - - int retVal = -1; - + struct yaffs_obj *obj; + + int retval = 0; + yaffsfs_Lock(); - obj = yaffsfs_FindObject(NULL,path,0); - - if(obj) - { - retVal = yaffsfs_DoChMod(obj,mode); - } - else - { - // todo error not found + + obj = yaffsfs_FindObject(NULL,path,0,1); + + if(obj) { + int access_ok = 1; + + if((amode & R_OK) && !(obj->yst_mode & S_IREAD)) + access_ok = 0; + if((amode & W_OK) && !(obj->yst_mode & S_IWRITE)) + access_ok = 0; + if((amode & X_OK) && !(obj->yst_mode & S_IEXEC)) + access_ok = 0; + + if(!access_ok) { + yaffsfs_SetError(-EACCES); + retval = -1; + } + } else { + /* todo error not found */ yaffsfs_SetError(-ENOENT); + retval = -1; } - + yaffsfs_Unlock(); - + + return retval; + +} + + +int yaffs_chmod(const YCHAR *path, mode_t mode) +{ + struct yaffs_obj *obj; + + int retVal = -1; + + yaffsfs_Lock(); + + obj = yaffsfs_FindObject(NULL,path,0,1); + + if(!obj) + yaffsfs_SetError(-ENOENT); + else if(obj->my_dev->read_only) + yaffsfs_SetError(-EINVAL); + else + retVal = yaffsfs_DoChMod(obj,mode); + + yaffsfs_Unlock(); + return retVal; - + } int yaffs_fchmod(int fd, mode_t mode) { - yaffs_Object *obj; - + struct yaffs_obj *obj; + int retVal = -1; - + yaffsfs_Lock(); obj = yaffsfs_GetHandleObject(fd); - - if(obj) - { - retVal = yaffsfs_DoChMod(obj,mode); - } + + if(!obj) + yaffsfs_SetError(-ENOENT); + else if(obj->my_dev->read_only) + yaffsfs_SetError(-EINVAL); else - { - // bad handle - yaffsfs_SetError(-EBADF); - } - + retVal = yaffsfs_DoChMod(obj,mode); + yaffsfs_Unlock(); - + return retVal; } -int yaffs_mkdir(const char *path, mode_t mode) +int yaffs_mkdir(const YCHAR *path, mode_t mode) { - yaffs_Object *parent = NULL; - yaffs_Object *dir; - char *name; + struct yaffs_obj *parent = NULL; + struct yaffs_obj *dir = NULL; + YCHAR *name; + YCHAR *use_path = NULL; + int path_length = 0; int retVal= -1; + int i; + + + /* + * We don't have a definition for max path length. + * We will use 3 * max name length instead. + */ + + path_length = strnlen(path,(YAFFS_MAX_NAME_LENGTH+1)*3 +1); + + /* If the last character is a path divider, then we need to + * trim it back so that the name look-up works properly. + * eg. /foo/new_dir/ -> /foo/newdir + * Curveball: Need to handle multiple path dividers: + * eg. /foof/sdfse///// -> /foo/sdfse + */ + if(path_length > 0 && + yaffsfs_IsPathDivider(path[path_length-1])){ + use_path = YMALLOC(path_length + 1); + if(!use_path){ + yaffsfs_SetError(-ENOMEM); + return -1; + } + strcpy(use_path, path); + for(i = path_length-1; + i >= 0 && yaffsfs_IsPathDivider(use_path[i]); + i--) + use_path[i] = (YCHAR) 0; + path = use_path; + } yaffsfs_Lock(); parent = yaffsfs_FindDirectory(NULL,path,&name,0); - dir = yaffs_MknodDirectory(parent,name,mode,0,0); - if(dir) - { - retVal = 0; - } - else - { - yaffsfs_SetError(-ENOSPC); // just assume no space for now - retVal = -1; + if(parent && yaffs_strnlen(name,5) == 0){ + /* Trying to make the root itself */ + yaffsfs_SetError(-EEXIST); + } else if(parent && parent->my_dev->read_only){ + yaffsfs_SetError(-EINVAL); + } else { + if(parent) + dir = yaffs_create_dir(parent,name,mode,0,0); + if(dir) + retVal = 0; + else { + if(!parent) + yaffsfs_SetError(-ENOENT); /* missing path */ + else if (yaffs_find_by_name(parent,name)) + yaffsfs_SetError(-EEXIST); /* the name already exists */ + else + yaffsfs_SetError(-ENOSPC); /* just assume no space */ + retVal = -1; + } } - + yaffsfs_Unlock(); - + + if(use_path) + YFREE(use_path); + return retVal; } -int yaffs_mount(const char *path) +void * yaffs_getdev(const YCHAR *path) +{ + struct yaffs_dev *dev=NULL; + YCHAR *dummy; + dev = yaffsfs_FindDevice(path,&dummy); + return (void *)dev; +} + +int yaffs_mount2(const YCHAR *path,int read_only) { int retVal=-1; int result=YAFFS_FAIL; - yaffs_Device *dev=NULL; - char *dummy; - - T(YAFFS_TRACE_ALWAYS,("yaffs: Mounting %s\n",path)); - + struct yaffs_dev *dev=NULL; + YCHAR *dummy; + + T(YAFFS_TRACE_MOUNT,(TSTR("yaffs: Mounting %s" TENDSTR),path)); + yaffsfs_Lock(); + + yaffsfs_InitHandles(); + dev = yaffsfs_FindDevice(path,&dummy); - if(dev) - { - if(!dev->isMounted) - { - result = yaffs_GutsInitialise(dev); + if(dev){ + if(!dev->is_mounted){ + dev->read_only = read_only ? 1 : 0; + result = yaffs_guts_initialise(dev); if(result == YAFFS_FAIL) - { - // todo error - mount failed + /* todo error - mount failed */ yaffsfs_SetError(-ENOMEM); - } retVal = result ? 0 : -1; - + } else - { - //todo error - already mounted. + /* todo error - already mounted. */ yaffsfs_SetError(-EBUSY); - } + } else + /* todo error - no device */ + yaffsfs_SetError(-ENODEV); + + yaffsfs_Unlock(); + return retVal; + +} + +int yaffs_mount(const YCHAR *path) +{ + return yaffs_mount2(path,0); +} + +int yaffs_sync(const YCHAR *path) +{ + int retVal=-1; + struct yaffs_dev *dev=NULL; + YCHAR *dummy; + + yaffsfs_Lock(); + dev = yaffsfs_FindDevice(path,&dummy); + if(dev){ + if(dev->is_mounted){ + + yaffs_flush_whole_cache(dev); + yaffs_checkpoint_save(dev); + retVal = 0; + + } else + /* todo error - not mounted. */ + yaffsfs_SetError(-EINVAL); + + }else + /* todo error - no device */ + yaffsfs_SetError(-ENODEV); + + yaffsfs_Unlock(); + return retVal; +} + + +int yaffs_remount(const YCHAR *path, int force, int read_only) +{ + int retVal=-1; + struct yaffs_dev *dev=NULL; + YCHAR *dummy; + + yaffsfs_Lock(); + dev = yaffsfs_FindDevice(path,&dummy); + if(dev){ + if(dev->is_mounted){ + int i; + int inUse; + + yaffs_flush_whole_cache(dev); + + for(i = inUse = 0; i < YAFFSFS_N_HANDLES && !inUse && !force; i++){ + if(yaffsfs_handle[i].useCount>0 && yaffsfs_inode[yaffsfs_handle[i].inodeId].iObj->my_dev == dev) + inUse = 1; /* the device is in use, can't unmount */ + } + + if(!inUse || force){ + if(read_only) + yaffs_checkpoint_save(dev); + dev->read_only = read_only ? 1 : 0; + retVal = 0; + } else + yaffsfs_SetError(-EBUSY); + + } else + yaffsfs_SetError(-EINVAL); + } else - { - // todo error - no device yaffsfs_SetError(-ENODEV); - } + yaffsfs_Unlock(); return retVal; - + } -int yaffs_unmount(const char *path) +int yaffs_unmount2(const YCHAR *path, int force) { - int retVal=-1; - yaffs_Device *dev=NULL; - char *dummy; - + int retVal=-1; + struct yaffs_dev *dev=NULL; + YCHAR *dummy; + yaffsfs_Lock(); dev = yaffsfs_FindDevice(path,&dummy); - if(dev) - { - if(dev->isMounted) - { + if(dev){ + if(dev->is_mounted){ int i; int inUse; - for(i = inUse = 0; i < YAFFSFS_N_HANDLES && !inUse; i++) - { - if(yaffsfs_handle[i].inUse && yaffsfs_handle[i].obj->myDev == dev) - { - inUse = 1; // the device is in use, can't unmount - } + + yaffs_flush_whole_cache(dev); + yaffs_checkpoint_save(dev); + + for(i = inUse = 0; i < YAFFSFS_N_HANDLES && !inUse; i++){ + if(yaffsfs_handle[i].useCount > 0 && yaffsfs_inode[yaffsfs_handle[i].inodeId].iObj->my_dev == dev) + inUse = 1; /* the device is in use, can't unmount */ } - - if(!inUse) - { - yaffs_Deinitialise(dev); - + + if(!inUse || force){ + yaffs_deinitialise(dev); + retVal = 0; - } - else - { - // todo error can't unmount as files are open + } else + /* todo error can't unmount as files are open */ yaffsfs_SetError(-EBUSY); - } - - } - else - { - //todo error - not mounted. + + } else + /* todo error - not mounted. */ yaffsfs_SetError(-EINVAL); - - } + } else - { - // todo error - no device + /* todo error - no device */ yaffsfs_SetError(-ENODEV); - } + yaffsfs_Unlock(); return retVal; - + } -off_t yaffs_freespace(const char *path) +int yaffs_unmount(const YCHAR *path) { - off_t retVal=-1; - yaffs_Device *dev=NULL; - char *dummy; - + return yaffs_unmount2(path,0); +} + +loff_t yaffs_freespace(const YCHAR *path) +{ + loff_t retVal=-1; + struct yaffs_dev *dev=NULL; + YCHAR *dummy; + yaffsfs_Lock(); dev = yaffsfs_FindDevice(path,&dummy); - if(dev) - { - retVal = yaffs_GetNumberOfFreeChunks(dev); - retVal *= dev->nBytesPerChunk; - - } - else - { + if(dev && dev->is_mounted){ + retVal = yaffs_get_n_free_chunks(dev); + retVal *= dev->data_bytes_per_chunk; + + } else + yaffsfs_SetError(-EINVAL); + + yaffsfs_Unlock(); + return retVal; +} + +loff_t yaffs_totalspace(const YCHAR *path) +{ + loff_t retVal=-1; + struct yaffs_dev *dev=NULL; + YCHAR *dummy; + + yaffsfs_Lock(); + dev = yaffsfs_FindDevice(path,&dummy); + if(dev && dev->is_mounted){ + retVal = (dev->param.end_block - dev->param.start_block + 1) - dev->param.n_reserved_blocks; + retVal *= dev->param.chunks_per_block; + retVal *= dev->data_bytes_per_chunk; + + } else yaffsfs_SetError(-EINVAL); + + yaffsfs_Unlock(); + return retVal; +} + +int yaffs_inodecount(const YCHAR *path) +{ + loff_t retVal= -1; + struct yaffs_dev *dev=NULL; + YCHAR *dummy; + + yaffsfs_Lock(); + dev = yaffsfs_FindDevice(path,&dummy); + if(dev && dev->is_mounted) { + int n_obj = dev->n_obj; + if(n_obj > dev->n_hardlinks) + retVal = n_obj - dev->n_hardlinks; } + if(retVal < 0) + yaffsfs_SetError(-EINVAL); + yaffsfs_Unlock(); return retVal; } -void yaffs_initialise(yaffsfs_DeviceConfiguration *cfgList) + +void yaffs_add_device(struct yaffs_dev *dev) +{ + dev->is_mounted = 0; + dev->param.remove_obj_fn = yaffsfs_RemoveObjectCallback; + + if(!dev->dev_list.next) + INIT_LIST_HEAD(&dev->dev_list); + + list_add(&dev->dev_list,&yaffsfs_deviceList); +} + +void yaffs_remove_device(struct yaffs_dev *dev) { - - yaffsfs_DeviceConfiguration *cfg; - - yaffsfs_configurationList = cfgList; - - yaffsfs_InitHandles(); - - cfg = yaffsfs_configurationList; - - while(cfg && cfg->prefix && cfg->dev) - { - cfg->dev->isMounted = 0; - cfg++; + list_del_init(&dev->dev_list); +} + + + + +/* Directory search stuff. */ + +/* + * Directory search context + * + * NB this is an opaque structure. + */ + + +typedef struct +{ + u32 magic; + yaffs_dirent de; /* directory entry being used by this dsc */ + YCHAR name[NAME_MAX+1]; /* name of directory being searched */ + struct yaffs_obj *dirObj; /* ptr to directory being searched */ + struct yaffs_obj *nextReturn; /* obj to be returned by next readddir */ + int offset; + struct list_head others; +} yaffsfs_DirectorySearchContext; + + + +static struct list_head search_contexts; + + +static void yaffsfs_SetDirRewound(yaffsfs_DirectorySearchContext *dsc) +{ + if(dsc && + dsc->dirObj && + dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY){ + + dsc->offset = 0; + + if( list_empty(&dsc->dirObj->variant.dir_variant.children)) + dsc->nextReturn = NULL; + else + dsc->nextReturn = list_entry(dsc->dirObj->variant.dir_variant.children.next, + struct yaffs_obj,siblings); + } else { + /* Hey someone isn't playing nice! */ + } +} + +static void yaffsfs_DirAdvance(yaffsfs_DirectorySearchContext *dsc) +{ + if(dsc && + dsc->dirObj && + dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY){ + + if( dsc->nextReturn == NULL || + list_empty(&dsc->dirObj->variant.dir_variant.children)) + dsc->nextReturn = NULL; + else { + struct list_head *next = dsc->nextReturn->siblings.next; + + if( next == &dsc->dirObj->variant.dir_variant.children) + dsc->nextReturn = NULL; /* end of list */ + else + dsc->nextReturn = list_entry(next,struct yaffs_obj,siblings); + } + } else { + /* Hey someone isn't playing nice! */ } - - } +static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj) +{ + + struct list_head *i; + yaffsfs_DirectorySearchContext *dsc; + + /* if search contexts not initilised then skip */ + if(!search_contexts.next) + return; + + /* Iterate through the directory search contexts. + * If any are the one being removed, then advance the dsc to + * the next one to prevent a hanging ptr. + */ + list_for_each(i, &search_contexts) { + if (i) { + dsc = list_entry(i, yaffsfs_DirectorySearchContext,others); + if(dsc->nextReturn == obj) + yaffsfs_DirAdvance(dsc); + } + } -// -// Directory search stuff. +} -yaffs_DIR *yaffs_opendir(const char *dirname) +yaffs_DIR *yaffs_opendir(const YCHAR *dirname) { yaffs_DIR *dir = NULL; - yaffs_Object *obj = NULL; + struct yaffs_obj *obj = NULL; yaffsfs_DirectorySearchContext *dsc = NULL; - + yaffsfs_Lock(); - - obj = yaffsfs_FindObject(NULL,dirname,0); - - if(obj && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) - { - + + obj = yaffsfs_FindObject(NULL,dirname,0,1); + + if(obj && obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY){ + dsc = YMALLOC(sizeof(yaffsfs_DirectorySearchContext)); dir = (yaffs_DIR *)dsc; - if(dsc) - { - dsc->magic = YAFFS_MAGIC; - dsc->list = NULL; - memset(dsc->name,0,NAME_MAX+1); - strncpy(dsc->name,dirname,NAME_MAX); + + if(dsc){ + memset(dsc,0,sizeof(yaffsfs_DirectorySearchContext)); + dsc->magic = YAFFS_MAGIC; + dsc->dirObj = obj; + yaffs_strncpy(dsc->name,dirname,NAME_MAX); + INIT_LIST_HEAD(&dsc->others); + + if(!search_contexts.next) + INIT_LIST_HEAD(&search_contexts); + + list_add(&dsc->others,&search_contexts); + yaffsfs_SetDirRewound(dsc); } - - } - + + } + yaffsfs_Unlock(); - + return dir; } @@ -1197,110 +2176,44 @@ struct yaffs_dirent *yaffs_readdir(yaffs_DIR *dirp) { yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp; struct yaffs_dirent *retVal = NULL; - struct list_head *i; - yaffs_Object *entry = NULL; - int offset; - yaffs_Object *obj = NULL; - struct yaffsfs_ObjectListEntry *list = NULL; - int inList = 0; - + yaffsfs_Lock(); - - offset = -1; - - if(dsc && dsc->magic == YAFFS_MAGIC) - { + + if(dsc && dsc->magic == YAFFS_MAGIC){ yaffsfs_SetError(0); - - obj = yaffsfs_FindObject(NULL,dsc->name,0); - - if(obj && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) - { - - list_for_each(i,&obj->variant.directoryVariant.children) - { - offset++; - entry = (i) ? list_entry(i, yaffs_Object,siblings) : NULL; - - if(entry) - { - list = dsc->list; - inList = 0; - while(list && !inList) - { - if(list->objectId == entry->objectId) - { - inList = 1; - } - list = list->next; - } - - if(!inList) goto foundNew; - } - - } - - foundNew: - - if(!inList && entry) + if(dsc->nextReturn){ + dsc->de.d_ino = yaffs_get_equivalent_obj(dsc->nextReturn)->obj_id; + dsc->de.d_dont_use = (unsigned)dsc->nextReturn; + dsc->de.d_off = dsc->offset++; + yaffs_get_obj_name(dsc->nextReturn,dsc->de.d_name,NAME_MAX); + if(yaffs_strnlen(dsc->de.d_name,NAME_MAX+1) == 0) { - //This is the entry we're going to return; - struct yaffsfs_ObjectListEntry *le; - - le = YMALLOC(sizeof(struct yaffsfs_ObjectListEntry)); - - if(le) - { - le->next = dsc->list; - le->objectId = entry->objectId; - dsc->list = le; - - dsc->de.d_ino = yaffs_GetEquivalentObject(entry)->objectId; - dsc->de.d_off = offset; - yaffs_GetObjectName(entry,dsc->de.d_name,NAME_MAX+1); - dsc->de.d_reclen = sizeof(struct yaffs_dirent); - - retVal = &dsc->de; - } - + /* this should not happen! */ + yaffs_strcpy(dsc->de.d_name,_Y("zz")); } - } - - } - else - { + dsc->de.d_reclen = sizeof(struct yaffs_dirent); + retVal = &dsc->de; + yaffsfs_DirAdvance(dsc); + } else + retVal = NULL; + } else yaffsfs_SetError(-EBADF); - } - + yaffsfs_Unlock(); - + return retVal; - -} -void yaffsfs_ListClear(yaffsfs_DirectorySearchContext *dsc) -{ - - struct yaffsfs_ObjectListEntry *le; - - if(dsc && dsc->magic == YAFFS_MAGIC) - { - while(dsc->list) - { - le = dsc->list; - dsc->list = dsc->list->next; - YFREE(le); - } - } - } + void yaffs_rewinddir(yaffs_DIR *dirp) { yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp; - + yaffsfs_Lock(); - yaffsfs_ListClear(dsc); + + yaffsfs_SetDirRewound(dsc); + yaffsfs_Unlock(); } @@ -1308,105 +2221,193 @@ void yaffs_rewinddir(yaffs_DIR *dirp) int yaffs_closedir(yaffs_DIR *dirp) { yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp; - - yaffsfs_Lock(); - yaffsfs_ListClear(dsc); - dsc->magic = 0; - YFREE(dsc); - yaffsfs_Unlock(); - return 0; + + yaffsfs_Lock(); + dsc->magic = 0; + list_del(&dsc->others); /* unhook from list */ + YFREE(dsc); + yaffsfs_Unlock(); + return 0; } +/* End of directory stuff */ -int yaffs_symlink(const char *oldpath, const char *newpath) +int yaffs_symlink(const YCHAR *oldpath, const YCHAR *newpath) { - yaffs_Object *parent = NULL; - yaffs_Object *obj; - char *name; + struct yaffs_obj *parent = NULL; + struct yaffs_obj *obj; + YCHAR *name; int retVal= -1; - int mode = 0; // ignore for now - + int mode = 0; /* ignore for now */ + yaffsfs_Lock(); parent = yaffsfs_FindDirectory(NULL,newpath,&name,0); - obj = yaffs_MknodSymLink(parent,name,mode,0,0,oldpath); - if(obj) - { - retVal = 0; - } - else - { - yaffsfs_SetError(-ENOSPC); // just assume no space for now + if(parent && parent->my_dev->read_only) + yaffsfs_SetError(-EINVAL); + else if(parent){ + obj = yaffs_create_symlink(parent,name,mode,0,0,oldpath); + if(obj) + retVal = 0; + else{ + yaffsfs_SetError(-ENOSPC); /* just assume no space for now */ + retVal = -1; + } + } else { + yaffsfs_SetError(-EINVAL); retVal = -1; } - + yaffsfs_Unlock(); - + return retVal; - + } -int yaffs_readlink(const char *path, char *buf, int bufsiz) +int yaffs_readlink(const YCHAR *path, YCHAR *buf, int bufsiz) { - yaffs_Object *obj = NULL; + struct yaffs_obj *obj = NULL; int retVal; - + yaffsfs_Lock(); - - obj = yaffsfs_FindObject(NULL,path,0); - - if(!obj) - { + + obj = yaffsfs_FindObject(NULL,path,0,1); + + if(!obj) { yaffsfs_SetError(-ENOENT); retVal = -1; - } - else if(obj->variantType != YAFFS_OBJECT_TYPE_SYMLINK) - { + } else if(obj->variant_type != YAFFS_OBJECT_TYPE_SYMLINK) { yaffsfs_SetError(-EINVAL); retVal = -1; - } - else - { - char *alias = obj->variant.symLinkVariant.alias; + } else { + YCHAR *alias = obj->variant.symlink_variant.alias; memset(buf,0,bufsiz); - strncpy(buf,alias,bufsiz - 1); + yaffs_strncpy(buf,alias,bufsiz - 1); retVal = 0; } yaffsfs_Unlock(); return retVal; } -int yaffs_link(const char *oldpath, const char *newpath); -int yaffs_mknod(const char *pathname, mode_t mode, dev_t dev); - -int yaffs_DumpDevStruct(const char *path) +int yaffs_link(const YCHAR *oldpath, const YCHAR *newpath) { - char *rest; - - yaffs_Object *obj = yaffsfs_FindRoot(path,&rest); - - if(obj) - { - yaffs_Device *dev = obj->myDev; + /* Creates a link called newpath to existing oldpath */ + struct yaffs_obj *obj = NULL; + struct yaffs_obj *target = NULL; + int retVal = 0; + int new_nameLength = 0; + + + yaffsfs_Lock(); + + obj = yaffsfs_FindObject(NULL,oldpath,0,1); + target = yaffsfs_FindObject(NULL,newpath,0,0); + + if(!obj) { + yaffsfs_SetError(-ENOENT); + retVal = -1; + } else if(obj->my_dev->read_only){ + yaffsfs_SetError(-EINVAL); + retVal= -1; + } else if(target) { + yaffsfs_SetError(-EEXIST); + retVal = -1; + } else { + struct yaffs_obj *newdir = NULL; + struct yaffs_obj *link = NULL; + + YCHAR *newname; + + newdir = yaffsfs_FindDirectory(NULL,newpath,&newname,0); + + if(!newdir){ + yaffsfs_SetError(-ENOTDIR); + retVal = -1; + }else if(newdir->my_dev != obj->my_dev){ + yaffsfs_SetError(-EXDEV); + retVal = -1; + } + + retVal = yaffsfs_CheckNameLength(newname); + if(retVal == 0) { + link = yaffs_link_obj(newdir,newname,obj); + if(link) + retVal = 0; + else{ + yaffsfs_SetError(-ENOSPC); + retVal = -1; + } + + } + } + yaffsfs_Unlock(); + + return retVal; +} + +int yaffs_mknod(const YCHAR *pathname, mode_t mode, dev_t dev) +{ + return -1; +} + + + +/* + * yaffs_n_handles() + * Returns number of handles attached to the object + */ +int yaffs_n_handles(const YCHAR *path) +{ + struct yaffs_obj *obj; + + obj = yaffsfs_FindObject(NULL,path,0,1); + + return yaffsfs_CountHandles(obj); +} + +int yaffs_get_error(void) +{ + return yaffsfs_GetLastError(); +} + +int yaffs_set_error(int error) +{ + /*yaffsfs_SetError does not return. So the program is assumed to have worked. */ + yaffsfs_SetError(error); + return 0; +} + +int yaffs_dump_dev(const YCHAR *path) +{ +#if 0 + YCHAR *rest; + + struct yaffs_obj *obj = yaffsfs_FindRoot(path,&rest); + + if(obj){ + struct yaffs_dev *dev = obj->my_dev; + printf("\n" - "nPageWrites.......... %d\n" - "nPageReads........... %d\n" - "nBlockErasures....... %d\n" - "nGCCopies............ %d\n" + "n_page_writes.......... %d\n" + "n_page_reads........... %d\n" + "n_erasures....... %d\n" + "n_gc_copies............ %d\n" "garbageCollections... %d\n" "passiveGarbageColl'ns %d\n" "\n", - dev->nPageWrites, - dev->nPageReads, - dev->nBlockErasures, - dev->nGCCopies, + dev->n_page_writes, + dev->n_page_reads, + dev->n_erasures, + dev->n_gc_copies, dev->garbageCollections, dev->passiveGarbageCollections ); - + } + +#endif return 0; }