/* * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. * * Copyright (C) 2002-2011 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 "yportenv.h" #include "yaffs_trace.h" #define YAFFSFS_MAX_SYMLINK_DEREFERENCES 5 #ifndef NULL #define NULL ((void *)0) #endif /* YAFFSFS_RW_SIZE must be a power of 2 */ #define YAFFSFS_RW_SHIFT (13) #define YAFFSFS_RW_SIZE (1<= 0 && h < YAFFSFS_N_HANDLES) return &yaffsfs_handle[h]; return NULL; } static struct yaffsfs_FileDes *yaffsfs_HandleToFileDes(int handle) { struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle); if (h && h->useCount > 0 && h->fdId >= 0 && h->fdId < YAFFSFS_N_HANDLES) return &yaffsfs_fd[h->fdId]; return NULL; } static struct yaffsfs_Inode *yaffsfs_HandleToInode(int handle) { struct yaffsfs_FileDes *fd = yaffsfs_HandleToFileDes(handle); if (fd && fd->handleCount > 0 && fd->inodeId >= 0 && fd->inodeId < YAFFSFS_N_HANDLES) return &yaffsfs_inode[fd->inodeId]; return NULL; } static struct yaffs_obj *yaffsfs_HandleToObject(int handle) { struct yaffsfs_Inode *in = yaffsfs_HandleToInode(handle); if (in) return in->iObj; return NULL; } /* * yaffsfs_FindInodeIdForObject * Find the inode entry for an object, if it exists. */ static int yaffsfs_FindInodeIdForObject(struct yaffs_obj *obj) { int i; 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 ret; } /* * yaffsfs_GetInodeIdForObject * Grab an inode entry when opening a new inode. */ static int yaffsfs_GetInodeIdForObject(struct yaffs_obj *obj) { int i; int ret; struct 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 ret; } static int yaffsfs_CountHandles(struct yaffs_obj *obj) { int i = yaffsfs_FindInodeIdForObject(obj); if (i >= 0) return yaffsfs_inode[i].count; else return 0; } static void yaffsfs_ReleaseInode(struct yaffsfs_Inode *in) { struct yaffs_obj *obj; 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) { struct yaffsfs_Inode *in = &yaffsfs_inode[inodeId]; in->count--; if (in->count <= 0) { yaffsfs_ReleaseInode(in); in->count = 0; } } } static int yaffsfs_NewHandle(struct yaffsfs_Handle **hptr) { int i; struct yaffsfs_Handle *h; for (i = 0; i < YAFFSFS_N_HANDLES; i++) { h = &yaffsfs_handle[i]; if (h->useCount < 1) { memset(h, 0, sizeof(struct yaffsfs_Handle)); h->fdId = -1; h->useCount = 1; if (hptr) *hptr = h; return i; } } return -1; } static int yaffsfs_NewHandleAndFileDes(void) { int i; struct yaffsfs_FileDes *fd; struct yaffsfs_Handle *h = NULL; int handle = yaffsfs_NewHandle(&h); if (handle < 0) return -1; for (i = 0; i < YAFFSFS_N_HANDLES; i++) { fd = &yaffsfs_fd[i]; if (fd->handleCount < 1) { memset(fd, 0, sizeof(struct yaffsfs_FileDes)); fd->inodeId = -1; fd->handleCount = 1; h->fdId = i; return handle; } } /* Dump the handle because we could not get a fd */ h->useCount = 0; return -1; } /* * yaffs_get_handle * Increase use of handle when reading/writing a file * Also gets the file descriptor. */ static int yaffsfs_GetHandle(int handle) { struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle); if (h && h->useCount > 0) { h->useCount++; return 0; } return -1; } /* * 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_PutFileDes(int fdId) { struct yaffsfs_FileDes *fd; if (fdId >= 0 && fdId < YAFFSFS_N_HANDLES) { fd = &yaffsfs_fd[fdId]; fd->handleCount--; if (fd->handleCount < 1) { if (fd->inodeId >= 0) { yaffsfs_PutInode(fd->inodeId); fd->inodeId = -1; } } } return 0; } static int yaffsfs_PutHandle(int handle) { struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle); if (h && h->useCount > 0) { h->useCount--; if (h->useCount < 1) { yaffsfs_PutFileDes(h->fdId); h->fdId = -1; } } return 0; } static void yaffsfs_BreakDeviceHandles(struct yaffs_dev *dev) { struct yaffsfs_FileDes *fd; struct yaffsfs_Handle *h; struct yaffs_obj *obj; int i; for (i = 0; i < YAFFSFS_N_HANDLES; i++) { h = yaffsfs_HandleToPointer(i); fd = yaffsfs_HandleToFileDes(i); obj = yaffsfs_HandleToObject(i); if (h && h->useCount > 0) { h->useCount = 0; h->fdId = 0; } if (fd && fd->handleCount > 0 && obj && obj->my_dev == dev) { fd->handleCount = 0; yaffsfs_PutInode(fd->inodeId); fd->inodeId = -1; } } } /* * Stuff to handle names. */ #ifdef CONFIG_YAFFS_CASE_INSENSITIVE static int yaffs_toupper(YCHAR a) { if (a >= 'a' && a <= 'z') return (a - 'a') + 'A'; else return a; } int yaffsfs_Match(YCHAR a, YCHAR b) { return (yaffs_toupper(a) == yaffs_toupper(b)); } #else int yaffsfs_Match(YCHAR a, YCHAR b) { /* case sensitive */ return (a == b); } #endif int yaffsfs_IsPathDivider(YCHAR ch) { 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; int nameLength = yaffs_strnlen(name, YAFFS_MAX_NAME_LENGTH + 1); if (nameLength == 0) { yaffsfs_SetError(-ENOENT); retVal = -1; } else if (nameLength > YAFFS_MAX_NAME_LENGTH) { yaffsfs_SetError(-ENAMETOOLONG); retVal = -1; } return retVal; } static int yaffsfs_alt_dir_path(const YCHAR *path, YCHAR **ret_path) { YCHAR *alt_path = NULL; int path_length; int i; /* * We don't have a definition for max path length. * We will use 3 * max name length instead. */ *ret_path = NULL; path_length = yaffs_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])) { alt_path = kmalloc(path_length + 1, 0); if (!alt_path) return -1; yaffs_strcpy(alt_path, path); for (i = path_length - 1; i >= 0 && yaffsfs_IsPathDivider(alt_path[i]); i--) alt_path[i] = (YCHAR) 0; } *ret_path = alt_path; return 0; } LIST_HEAD(yaffsfs_deviceList); /* * yaffsfs_FindDevice * yaffsfs_FindRoot * Scan the configuration list to find the device * 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 = 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; } } } /* 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 if fully matched */ if (*p) matching = 0; if (matching && (thisMatchLength > longestMatch)) { /* Matched prefix */ *restOfPath = (YCHAR *) leftOver; retval = dev; longestMatch = thisMatchLength; } } return retval; } static int yaffsfs_CheckPath(const YCHAR *path) { int n = 0; int divs = 0; while (*path && n < YAFFS_MAX_NAME_LENGTH && divs < 100) { if (yaffsfs_IsPathDivider(*path)) { n = 0; divs++; } else n++; path++; } return (*path) ? -1 : 0; } /* FindMountPoint only returns a dev entry if the path is a mount point */ static struct yaffs_dev *yaffsfs_FindMountPoint(const YCHAR *path) { struct yaffs_dev *dev; YCHAR *restOfPath = NULL; dev = yaffsfs_FindDevice(path, &restOfPath); if (dev && restOfPath && *restOfPath) dev = NULL; return dev; } static struct yaffs_obj *yaffsfs_FindRoot(const YCHAR *path, YCHAR **restOfPath) { struct yaffs_dev *dev; dev = yaffsfs_FindDevice(path, restOfPath); if (dev && dev->is_mounted) return dev->root_dir; return NULL; } static struct yaffs_obj *yaffsfs_FollowLink(struct yaffs_obj *obj, int symDepth, int *loop) { 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, NULL, NULL, loop); else /* * Relative to here so use the parent of the * symlink as a start */ obj = yaffsfs_FindObject(obj->parent, alias, symDepth++, 1, NULL, NULL, loop); } 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 struct yaffs_obj *yaffsfs_DoFindDirectory(struct yaffs_obj *startDir, const YCHAR *path, YCHAR **name, int symDepth, int *notDir, int *loop) { struct yaffs_obj *dir; YCHAR *restOfPath; YCHAR str[YAFFS_MAX_NAME_LENGTH + 1]; int i; if (symDepth > YAFFSFS_MAX_SYMLINK_DEREFERENCES) { if (loop) *loop = 1; return NULL; } if (startDir) { dir = startDir; 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 (yaffsfs_IsPathDivider(*restOfPath)) restOfPath++; /* get rid of '/' */ *name = restOfPath; i = 0; 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 */ return dir; else { if (yaffs_strcmp(str, _Y(".")) == 0) { /* Do nothing */ } else if (yaffs_strcmp(str, _Y("..")) == 0) { dir = dir->parent; } else { dir = yaffs_find_by_name(dir, str); dir = yaffsfs_FollowLink(dir, symDepth, loop); if (dir && dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { if (notDir) *notDir = 1; dir = NULL; } } } } /* directory did not exist. */ return NULL; } static struct yaffs_obj *yaffsfs_FindDirectory(struct yaffs_obj *relDir, const YCHAR *path, YCHAR **name, int symDepth, int *notDir, int *loop) { return yaffsfs_DoFindDirectory(relDir, path, name, symDepth, notDir, loop); } /* * yaffsfs_FindObject turns a path for an existing object into the object */ static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relDir, const YCHAR *path, int symDepth, int getEquiv, struct yaffs_obj **dirOut, int *notDir, int *loop) { struct yaffs_obj *dir; struct yaffs_obj *obj; YCHAR *name; dir = yaffsfs_FindDirectory(relDir, path, &name, symDepth, notDir, loop); if (dirOut) *dirOut = dir; if (dir && *name) obj = yaffs_find_by_name(dir, name); else obj = dir; if (getEquiv) obj = yaffs_get_equivalent_obj(obj); return obj; } /************************************************************************* * Start of yaffsfs visible functions. *************************************************************************/ int yaffs_dup(int handle) { int newHandleNumber = -1; struct yaffsfs_FileDes *existingFD = NULL; struct yaffsfs_Handle *existingHandle = NULL; struct yaffsfs_Handle *newHandle = NULL; yaffsfs_Lock(); existingHandle = yaffsfs_HandleToPointer(handle); existingFD = yaffsfs_HandleToFileDes(handle); if (existingFD) newHandleNumber = yaffsfs_NewHandle(&newHandle); if (newHandle) { newHandle->fdId = existingHandle->fdId; existingFD->handleCount++; } yaffsfs_Unlock(); if (!existingFD) yaffsfs_SetError(-EBADF); else if (!newHandle) yaffsfs_SetError(-ENOMEM); return newHandleNumber; } static int yaffsfs_TooManyObjects(struct yaffs_dev *dev) { int current_objects = dev->n_obj - dev->n_deleted_files; if (dev->param.max_objects && current_objects > dev->param.max_objects) return 1; else return 0; } int yaffs_open_sharing(const YCHAR *path, int oflag, int mode, int sharing) { struct yaffs_obj *obj = NULL; struct yaffs_obj *dir = NULL; YCHAR *name; int handle = -1; struct yaffsfs_FileDes *fd = NULL; int openDenied = 0; int symDepth = 0; int errorReported = 0; 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; int notDir = 0; int loop = 0; if (!path) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(path) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } /* 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_NewHandleAndFileDes(); if (handle < 0) { yaffsfs_SetError(-ENFILE); errorReported = 1; } else { fd = yaffsfs_HandleToFileDes(handle); /* try to find the exisiting object */ obj = yaffsfs_FindObject(NULL, path, 0, 1, NULL, NULL, NULL); obj = yaffsfs_FollowLink(obj, symDepth++, &loop); 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 */ /* A directory can't be opened 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 * for a file that exists. */ if (!errorReported && (oflag & O_EXCL) && (oflag & O_CREAT)) { openDenied = 1; yaffsfs_SetError(-EEXIST); errorReported = 1; } /* Check file permissions */ if (readRequested && !(obj->yst_mode & S_IREAD)) openDenied = 1; if (writeRequested && !(obj->yst_mode & S_IWRITE)) openDenied = 1; if (!errorReported && writeRequested && obj->my_dev->read_only) { openDenied = 1; yaffsfs_SetError(-EROFS); errorReported = 1; } if (openDenied && !errorReported) { yaffsfs_SetError(-EACCES); errorReported = 1; } /* Check sharing of an existing object. */ if (!openDenied) { struct yaffsfs_FileDes *fdx; int i; sharedReadAllowed = 1; sharedWriteAllowed = 1; alreadyReading = 0; alreadyWriting = 0; for (i = 0; i < YAFFSFS_N_HANDLES; i++) { fdx = &yaffsfs_fd[i]; if (fdx->handleCount > 0 && fdx->inodeId >= 0 && yaffsfs_inode[fdx->inodeId].iObj == obj) { if (!fdx->shareRead) sharedReadAllowed = 0; if (!fdx->shareWrite) sharedWriteAllowed = 0; if (fdx->reading) alreadyReading = 1; if (fdx->writing) alreadyWriting = 1; } } if ((!sharedReadAllowed && readRequested) || (!shareRead && alreadyReading) || (!sharedWriteAllowed && writeRequested) || (!shareWrite && alreadyWriting)) { openDenied = 1; yaffsfs_SetError(-EBUSY); errorReported = 1; } } } /* 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, ¬Dir, &loop); if (!dir && notDir) { yaffsfs_SetError(-ENOTDIR); errorReported = 1; } else if (loop) { yaffsfs_SetError(-ELOOP); errorReported = 1; } else if (!dir) { yaffsfs_SetError(-ENOENT); errorReported = 1; } } if (!obj && dir && !errorReported && (oflag & O_CREAT)) { /* Let's see if we can create this file */ if (dir->my_dev->read_only) { yaffsfs_SetError(-EROFS); errorReported = 1; } else if (yaffsfs_TooManyObjects(dir->my_dev)) { yaffsfs_SetError(-ENFILE); errorReported = 1; } else obj = yaffs_create_file(dir, name, mode, 0, 0); if (!obj && !errorReported) { yaffsfs_SetError(-ENOSPC); errorReported = 1; } } if (!obj && dir && !errorReported && !(oflag & O_CREAT)) { yaffsfs_SetError(-ENOENT); errorReported = 1; } if (obj && !openDenied) { int inodeId = yaffsfs_GetInodeIdForObject(obj); if (inodeId < 0) { /* * Todo: Fix any problem if inodes run out, * That can't happen if the number of inode * items >= number of handles. */ } fd->inodeId = inodeId; fd->reading = readRequested; fd->writing = writeRequested; fd->append = (oflag & O_APPEND) ? 1 : 0; fd->position = 0; fd->shareRead = shareRead; fd->shareWrite = shareWrite; /* Hook inode to object */ obj->my_inode = (void *)&yaffsfs_inode[inodeId]; if ((oflag & O_TRUNC) && fd->writing) yaffs_resize_file(obj, 0); } else { yaffsfs_PutHandle(handle); if (!errorReported) yaffsfs_SetError(0); /* Problem */ handle = -1; } } yaffsfs_Unlock(); 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 handle, int datasync) { int retVal = -1; struct yaffs_obj *obj; yaffsfs_Lock(); obj = yaffsfs_HandleToObject(handle); if (!obj) yaffsfs_SetError(-EBADF); else if (obj->my_dev->read_only) yaffsfs_SetError(-EROFS); else { yaffs_flush_file(obj, 1, datasync); retVal = 0; } yaffsfs_Unlock(); return retVal; } int yaffs_fsync(int handle) { return yaffs_Dofsync(handle, 0); } int yaffs_flush(int handle) { return yaffs_fsync(handle); } int yaffs_fdatasync(int handle) { return yaffs_Dofsync(handle, 1); } int yaffs_close(int handle) { struct yaffsfs_Handle *h = NULL; struct yaffs_obj *obj = NULL; int retVal = -1; yaffsfs_Lock(); h = yaffsfs_HandleToPointer(handle); obj = yaffsfs_HandleToObject(handle); if (!h || !obj) yaffsfs_SetError(-EBADF); else { /* clean up */ yaffs_flush_file(obj, 1, 0); yaffsfs_PutHandle(handle); retVal = 0; } yaffsfs_Unlock(); return retVal; } int yaffsfs_do_read(int handle, void *vbuf, unsigned int nbyte, int isPread, loff_t offset) { struct yaffsfs_FileDes *fd = NULL; struct yaffs_obj *obj = NULL; loff_t pos = 0; loff_t startPos = 0; loff_t endPos = 0; int nRead = 0; int nToRead = 0; int totalRead = 0; loff_t maxRead; u8 *buf = (u8 *) vbuf; if (!vbuf) { yaffsfs_SetError(-EFAULT); return -1; } yaffsfs_Lock(); fd = yaffsfs_HandleToFileDes(handle); obj = yaffsfs_HandleToObject(handle); if (!fd || !obj) { /* bad handle */ yaffsfs_SetError(-EBADF); totalRead = -1; } else if (!fd->reading) { /* Not a reading handle */ yaffsfs_SetError(-EINVAL); totalRead = -1; } else if (nbyte > YAFFS_MAX_FILE_SIZE) { yaffsfs_SetError(-EINVAL); totalRead = -1; } else { if (isPread) startPos = offset; else startPos = fd->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; yaffsfs_GetHandle(handle); endPos = pos + nbyte; if (pos < 0 || pos > YAFFS_MAX_FILE_SIZE || nbyte > YAFFS_MAX_FILE_SIZE || endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE) { totalRead = -1; nbyte = 0; } while (nbyte > 0) { nToRead = YAFFSFS_RW_SIZE - (pos & (YAFFSFS_RW_SIZE - 1)); if (nToRead > nbyte) nToRead = nbyte; /* Tricky bit... * Need to reverify object in case the device was * unmounted in another thread. */ obj = yaffsfs_HandleToObject(handle); if (!obj) nRead = 0; else nRead = yaffs_file_rd(obj, buf, pos, nToRead); if (nRead > 0) { totalRead += nRead; pos += nRead; buf += nRead; } if (nRead == nToRead) nbyte -= nRead; else nbyte = 0; /* no more to read */ if (nbyte > 0) { yaffsfs_Unlock(); yaffsfs_Lock(); } } yaffsfs_PutHandle(handle); if (!isPread) { if (totalRead >= 0) fd->position = startPos + totalRead; else yaffsfs_SetError(-EINVAL); } } yaffsfs_Unlock(); return (totalRead >= 0) ? totalRead : -1; } int yaffs_read(int handle, void *buf, unsigned int nbyte) { return yaffsfs_do_read(handle, buf, nbyte, 0, 0); } int yaffs_pread(int handle, void *buf, unsigned int nbyte, loff_t offset) { return yaffsfs_do_read(handle, buf, nbyte, 1, offset); } int yaffsfs_do_write(int handle, const void *vbuf, unsigned int nbyte, int isPwrite, loff_t offset) { struct yaffsfs_FileDes *fd = NULL; struct yaffs_obj *obj = NULL; loff_t pos = 0; loff_t startPos = 0; loff_t endPos; int nWritten = 0; int totalWritten = 0; int write_trhrough = 0; int nToWrite = 0; const u8 *buf = (const u8 *)vbuf; if (!vbuf) { yaffsfs_SetError(-EFAULT); return -1; } yaffsfs_Lock(); fd = yaffsfs_HandleToFileDes(handle); obj = yaffsfs_HandleToObject(handle); if (!fd || !obj) { /* bad handle */ yaffsfs_SetError(-EBADF); totalWritten = -1; } else if (!fd->writing) { yaffsfs_SetError(-EINVAL); totalWritten = -1; } else if (obj->my_dev->read_only) { yaffsfs_SetError(-EROFS); totalWritten = -1; } else { if (fd->append) startPos = yaffs_get_obj_length(obj); else if (isPwrite) startPos = offset; else startPos = fd->position; yaffsfs_GetHandle(handle); pos = startPos; endPos = pos + nbyte; if (pos < 0 || pos > YAFFS_MAX_FILE_SIZE || nbyte > YAFFS_MAX_FILE_SIZE || endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE) { totalWritten = -1; nbyte = 0; } while (nbyte > 0) { nToWrite = YAFFSFS_RW_SIZE - (pos & (YAFFSFS_RW_SIZE - 1)); if (nToWrite > nbyte) nToWrite = nbyte; /* Tricky bit... * Need to reverify object in case the device was * remounted or unmounted in another thread. */ obj = yaffsfs_HandleToObject(handle); if (!obj || obj->my_dev->read_only) nWritten = 0; else 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(); } } yaffsfs_PutHandle(handle); if (!isPwrite) { if (totalWritten > 0) fd->position = startPos + totalWritten; else yaffsfs_SetError(-EINVAL); } } 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, loff_t offset) { return yaffsfs_do_write(fd, buf, nbyte, 1, offset); } int yaffs_truncate(const YCHAR *path, loff_t new_size) { struct yaffs_obj *obj = NULL; struct yaffs_obj *dir = NULL; int result = YAFFS_FAIL; int notDir = 0; int loop = 0; if (!path) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(path) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } yaffsfs_Lock(); obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop); obj = yaffsfs_FollowLink(obj, 0, &loop); if (!dir && notDir) yaffsfs_SetError(-ENOTDIR); else if (loop) yaffsfs_SetError(-ELOOP); else if (!dir || !obj) yaffsfs_SetError(-ENOENT); else if (obj->my_dev->read_only) yaffsfs_SetError(-EROFS); else if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE) yaffsfs_SetError(-EISDIR); else if (obj->my_dev->read_only) yaffsfs_SetError(-EROFS); else if (new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE) yaffsfs_SetError(-EINVAL); else result = yaffs_resize_file(obj, new_size); yaffsfs_Unlock(); return (result) ? 0 : -1; } int yaffs_ftruncate(int handle, loff_t new_size) { struct yaffsfs_FileDes *fd = NULL; struct yaffs_obj *obj = NULL; int result = 0; yaffsfs_Lock(); fd = yaffsfs_HandleToFileDes(handle); obj = yaffsfs_HandleToObject(handle); if (!fd || !obj) /* bad handle */ yaffsfs_SetError(-EBADF); else if (!fd->writing) yaffsfs_SetError(-EINVAL); else if (obj->my_dev->read_only) yaffsfs_SetError(-EROFS); else if (new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE) yaffsfs_SetError(-EINVAL); else /* resize the file */ result = yaffs_resize_file(obj, new_size); yaffsfs_Unlock(); return (result) ? 0 : -1; } loff_t yaffs_lseek(int handle, loff_t offset, int whence) { struct yaffsfs_FileDes *fd = NULL; struct yaffs_obj *obj = NULL; loff_t pos = -1; loff_t fSize = -1; yaffsfs_Lock(); fd = yaffsfs_HandleToFileDes(handle); obj = yaffsfs_HandleToObject(handle); if (!fd || !obj) yaffsfs_SetError(-EBADF); else if (offset > YAFFS_MAX_FILE_SIZE) yaffsfs_SetError(-EINVAL); else { if (whence == SEEK_SET) { if (offset >= 0) pos = offset; } else if (whence == SEEK_CUR) { if ((fd->position + offset) >= 0) pos = (fd->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 && pos <= YAFFS_MAX_FILE_SIZE) fd->position = pos; else { yaffsfs_SetError(-EINVAL); pos = -1; } } yaffsfs_Unlock(); return pos; } int yaffsfs_DoUnlink(const YCHAR *path, int isDirectory) { struct yaffs_obj *dir = NULL; struct yaffs_obj *obj = NULL; YCHAR *name; int result = YAFFS_FAIL; int notDir = 0; int loop = 0; if (!path) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(path) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } yaffsfs_Lock(); obj = yaffsfs_FindObject(NULL, path, 0, 0, NULL, NULL, NULL); dir = yaffsfs_FindDirectory(NULL, path, &name, 0, ¬Dir, &loop); if (!dir && notDir) yaffsfs_SetError(-ENOTDIR); else if (loop) yaffsfs_SetError(-ELOOP); else if (!dir) yaffsfs_SetError(-ENOENT); else if (yaffs_strncmp(name, _Y("."), 2) == 0) yaffsfs_SetError(-EINVAL); else if (!obj) yaffsfs_SetError(-ENOENT); else if (obj->my_dev->read_only) yaffsfs_SetError(-EROFS); else if (!isDirectory && obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) yaffsfs_SetError(-EISDIR); else if (isDirectory && obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) yaffsfs_SetError(-ENOTDIR); else if (isDirectory && obj == obj->my_dev->root_dir) yaffsfs_SetError(-EBUSY); /* Can't rmdir a root */ else { result = yaffs_unlinker(dir, name); if (result == YAFFS_FAIL && isDirectory) yaffsfs_SetError(-ENOTEMPTY); } yaffsfs_Unlock(); return (result == YAFFS_FAIL) ? -1 : 0; } int yaffs_unlink(const YCHAR *path) { return yaffsfs_DoUnlink(path, 0); } int yaffs_rename(const YCHAR *oldPath, const YCHAR *newPath) { struct yaffs_obj *olddir = NULL; struct yaffs_obj *newdir = NULL; struct yaffs_obj *obj = NULL; struct yaffs_obj *newobj = NULL; YCHAR *oldname; YCHAR *newname; int result = YAFFS_FAIL; int rename_allowed = 1; int notOldDir = 0; int notNewDir = 0; int oldLoop = 0; int newLoop = 0; YCHAR *alt_newpath = NULL; if (!oldPath || !newPath) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(oldPath) < 0 || yaffsfs_CheckPath(newPath) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } if (yaffsfs_alt_dir_path(newPath, &alt_newpath) < 0) { yaffsfs_SetError(-ENOMEM); return -1; } if (alt_newpath) newPath = alt_newpath; yaffsfs_Lock(); olddir = yaffsfs_FindDirectory(NULL, oldPath, &oldname, 0, ¬OldDir, &oldLoop); newdir = yaffsfs_FindDirectory(NULL, newPath, &newname, 0, ¬NewDir, &newLoop); obj = yaffsfs_FindObject(NULL, oldPath, 0, 0, NULL, NULL, NULL); newobj = yaffsfs_FindObject(NULL, newPath, 0, 0, NULL, NULL, NULL); /* If the object being renamed is a directory and the * path ended with a "/" then the olddir == obj. * We pass through NULL for the old name to tell the lower layers * to use olddir as the object. */ if (olddir == obj) oldname = NULL; if ((!olddir && notOldDir) || (!newdir && notNewDir)) { yaffsfs_SetError(-ENOTDIR); rename_allowed = 0; } else if (oldLoop || newLoop) { yaffsfs_SetError(-ELOOP); rename_allowed = 0; } else if (olddir && oldname && yaffs_strncmp(oldname, _Y("."), 2) == 0) { yaffsfs_SetError(-EINVAL); rename_allowed = 0; } else if (!olddir || !newdir || !obj) { yaffsfs_SetError(-ENOENT); rename_allowed = 0; } else if (obj->my_dev->read_only) { yaffsfs_SetError(-EROFS); rename_allowed = 0; } else if (yaffs_is_non_empty_dir(newobj)) { yaffsfs_SetError(-ENOTEMPTY); rename_allowed = 0; } else if (olddir->my_dev != newdir->my_dev) { /* Rename must be on same device */ yaffsfs_SetError(-EXDEV); 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) rename_allowed = 0; xx = xx->parent; } if (!rename_allowed) yaffsfs_SetError(-EINVAL); } if (rename_allowed) result = yaffs_rename_obj(olddir, oldname, newdir, newname); yaffsfs_Unlock(); kfree(alt_newpath); return (result == YAFFS_FAIL) ? -1 : 0; } static int yaffsfs_DoStat(struct yaffs_obj *obj, struct yaffs_stat *buf) { int retVal = -1; obj = yaffs_get_equivalent_obj(obj); 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; if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) buf->st_mode |= S_IFDIR; else if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) buf->st_mode |= S_IFLNK; else if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) buf->st_mode |= S_IFREG; 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 YCHAR *path, struct yaffs_stat *buf, int doLStat) { struct yaffs_obj *obj = NULL; struct yaffs_obj *dir = NULL; int retVal = -1; int notDir = 0; int loop = 0; if (!path || !buf) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(path) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } yaffsfs_Lock(); obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop); if (!doLStat && obj) obj = yaffsfs_FollowLink(obj, 0, &loop); if (!dir && notDir) yaffsfs_SetError(-ENOTDIR); else if (loop) yaffsfs_SetError(-ELOOP); else if (!dir || !obj) yaffsfs_SetError(-ENOENT); else retVal = yaffsfs_DoStat(obj, buf); yaffsfs_Unlock(); return retVal; } int yaffs_stat(const YCHAR *path, struct yaffs_stat *buf) { return yaffsfs_DoStatOrLStat(path, buf, 0); } 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) { struct yaffs_obj *obj; int retVal = -1; if (!buf) { yaffsfs_SetError(-EFAULT); return -1; } yaffsfs_Lock(); obj = yaffsfs_HandleToObject(fd); if (obj) retVal = yaffsfs_DoStat(obj, buf); else /* bad handle */ yaffsfs_SetError(-EBADF); yaffsfs_Unlock(); return retVal; } static int yaffsfs_DoUtime(struct yaffs_obj *obj, const struct yaffs_utimbuf *buf) { int retVal = -1; int result; struct yaffs_utimbuf local; obj = yaffs_get_equivalent_obj(obj); if (obj && obj->my_dev->read_only) { yaffsfs_SetError(-EROFS); return -1; } if (!buf) { local.actime = Y_CURRENT_TIME; local.modtime = local.actime; buf = &local; } if (obj) { obj->yst_atime = buf->actime; obj->yst_mtime = buf->modtime; obj->dirty = 1; result = yaffs_flush_file(obj, 0, 0); retVal = result == YAFFS_OK ? 0 : -1; } return retVal; } int yaffs_utime(const YCHAR *path, const struct yaffs_utimbuf *buf) { struct yaffs_obj *obj = NULL; struct yaffs_obj *dir = NULL; int retVal = -1; int notDir = 0; int loop = 0; if (!path) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(path) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } yaffsfs_Lock(); obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop); if (!dir && notDir) yaffsfs_SetError(-ENOTDIR); else if (loop) yaffsfs_SetError(-ELOOP); else if (!dir || !obj) yaffsfs_SetError(-ENOENT); else retVal = yaffsfs_DoUtime(obj, buf); yaffsfs_Unlock(); return retVal; } int yaffs_futime(int fd, const struct yaffs_utimbuf *buf) { struct yaffs_obj *obj; int retVal = -1; yaffsfs_Lock(); obj = yaffsfs_HandleToObject(fd); if (obj) retVal = yaffsfs_DoUtime(obj, buf); else /* 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; struct yaffs_obj *dir; int notDir = 0; int loop = 0; int retVal = -1; if (!path || !name || !data) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(path) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } yaffsfs_Lock(); obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop); if (follow) obj = yaffsfs_FollowLink(obj, 0, &loop); if (!dir && notDir) yaffsfs_SetError(-ENOTDIR); else if (loop) yaffsfs_SetError(-ELOOP); else if (!dir || !obj) yaffsfs_SetError(-ENOENT); else { retVal = yaffs_set_xattrib(obj, name, data, size, flags); if (retVal < 0) { yaffsfs_SetError(retVal); retVal = -1; } } 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; if (!name || !data) { yaffsfs_SetError(-EFAULT); return -1; } yaffsfs_Lock(); obj = yaffsfs_HandleToObject(fd); if (!obj) yaffsfs_SetError(-EBADF); else { retVal = yaffs_set_xattrib(obj, name, data, size, flags); if (retVal < 0) { yaffsfs_SetError(retVal); retVal = -1; } } 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; struct yaffs_obj *dir; int retVal = -1; int notDir = 0; int loop = 0; if (!path || !name || !data) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(path) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } yaffsfs_Lock(); obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop); if (follow) obj = yaffsfs_FollowLink(obj, 0, &loop); if (!dir && notDir) yaffsfs_SetError(-ENOTDIR); else if (loop) yaffsfs_SetError(-ELOOP); else if (!dir || !obj) yaffsfs_SetError(-ENOENT); else { retVal = yaffs_get_xattrib(obj, name, data, size); if (retVal < 0) { yaffsfs_SetError(retVal); retVal = -1; } } 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; if (!name || !data) { yaffsfs_SetError(-EFAULT); return -1; } yaffsfs_Lock(); obj = yaffsfs_HandleToObject(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 = NULL; struct yaffs_obj *dir = NULL; int retVal = -1; int notDir = 0; int loop = 0; if (!path || !data) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(path) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } yaffsfs_Lock(); obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop); if (follow) obj = yaffsfs_FollowLink(obj, 0, &loop); if (!dir && notDir) yaffsfs_SetError(-ENOTDIR); else if (loop) yaffsfs_SetError(-ELOOP); else if (!dir || !obj) yaffsfs_SetError(-ENOENT); else { retVal = yaffs_list_xattrib(obj, data, size); if (retVal < 0) { yaffsfs_SetError(retVal); retVal = -1; } } 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; if (!data) { yaffsfs_SetError(-EFAULT); return -1; } yaffsfs_Lock(); obj = yaffsfs_HandleToObject(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 = NULL; struct yaffs_obj *dir = NULL; int notDir = 0; int loop = 0; int retVal = -1; if (!path || !name) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(path) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } yaffsfs_Lock(); obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop); if (follow) obj = yaffsfs_FollowLink(obj, 0, &loop); if (!dir && notDir) yaffsfs_SetError(-ENOTDIR); else if (loop) yaffsfs_SetError(-ELOOP); else if (!dir || !obj) yaffsfs_SetError(-ENOENT); else { retVal = yaffs_remove_xattrib(obj, name); if (retVal < 0) { yaffsfs_SetError(retVal); retVal = -1; } } 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; if (!name) { yaffsfs_SetError(-EFAULT); return -1; } yaffsfs_Lock(); obj = yaffsfs_HandleToObject(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_HandleToObject(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; } int yaffs_set_wince_times(int fd, const unsigned *wctime, const unsigned *watime, const unsigned *wmtime) { struct yaffs_obj *obj; int result; int retVal = -1; yaffsfs_Lock(); obj = yaffsfs_HandleToObject(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_get_equivalent_obj(obj); if (obj) { obj->yst_mode = mode; obj->dirty = 1; result = yaffs_flush_file(obj, 0, 0); } return result == YAFFS_OK ? 0 : -1; } int yaffs_access(const YCHAR *path, int amode) { struct yaffs_obj *obj = NULL; struct yaffs_obj *dir = NULL; int notDir = 0; int loop = 0; int retval = -1; if (!path) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(path) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } if (amode & ~(R_OK | W_OK | X_OK)) { yaffsfs_SetError(-EINVAL); return -1; } yaffsfs_Lock(); obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop); obj = yaffsfs_FollowLink(obj, 0, &loop); if (!dir && notDir) yaffsfs_SetError(-ENOTDIR); else if (loop) yaffsfs_SetError(-ELOOP); else if (!dir || !obj) yaffsfs_SetError(-ENOENT); else if ((amode & W_OK) && obj->my_dev->read_only) yaffsfs_SetError(-EROFS); else { 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); else retval = 0; } yaffsfs_Unlock(); return retval; } int yaffs_chmod(const YCHAR *path, mode_t mode) { struct yaffs_obj *obj = NULL; struct yaffs_obj *dir = NULL; int retVal = -1; int notDir = 0; int loop = 0; if (!path) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(path) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } if (mode & ~(0777)) { yaffsfs_SetError(-EINVAL); return -1; } yaffsfs_Lock(); obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop); obj = yaffsfs_FollowLink(obj, 0, &loop); if (!dir && notDir) yaffsfs_SetError(-ENOTDIR); else if (loop) yaffsfs_SetError(-ELOOP); else if (!dir || !obj) yaffsfs_SetError(-ENOENT); else if (obj->my_dev->read_only) yaffsfs_SetError(-EROFS); else retVal = yaffsfs_DoChMod(obj, mode); yaffsfs_Unlock(); return retVal; } int yaffs_fchmod(int fd, mode_t mode) { struct yaffs_obj *obj; int retVal = -1; if (mode & ~(0777)) { yaffsfs_SetError(-EINVAL); return -1; } yaffsfs_Lock(); obj = yaffsfs_HandleToObject(fd); if (!obj) yaffsfs_SetError(-EBADF); else if (obj->my_dev->read_only) yaffsfs_SetError(-EROFS); else retVal = yaffsfs_DoChMod(obj, mode); yaffsfs_Unlock(); return retVal; } int yaffs_mkdir(const YCHAR *path, mode_t mode) { struct yaffs_obj *parent = NULL; struct yaffs_obj *dir = NULL; YCHAR *name; YCHAR *alt_path = NULL; int retVal = -1; int notDir = 0; int loop = 0; if (!path) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(path) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } if (yaffsfs_alt_dir_path(path, &alt_path) < 0) { yaffsfs_SetError(-ENOMEM); return -1; } if (alt_path) path = alt_path; yaffsfs_Lock(); parent = yaffsfs_FindDirectory(NULL, path, &name, 0, ¬Dir, &loop); if (!parent && notDir) yaffsfs_SetError(-ENOTDIR); else if (loop) yaffsfs_SetError(-ELOOP); else if (!parent) yaffsfs_SetError(-ENOENT); else if (yaffsfs_TooManyObjects(parent->my_dev)) yaffsfs_SetError(-ENFILE); else if (yaffs_strnlen(name, 5) == 0) { /* Trying to make the root itself */ yaffsfs_SetError(-EEXIST); } else if (parent->my_dev->read_only) yaffsfs_SetError(-EROFS); else { dir = yaffs_create_dir(parent, name, mode, 0, 0); if (dir) retVal = 0; else if (yaffs_find_by_name(parent, name)) yaffsfs_SetError(-EEXIST); /* name exists */ else yaffsfs_SetError(-ENOSPC); /* assume no space */ } yaffsfs_Unlock(); kfree(alt_path); return retVal; } int yaffs_rmdir(const YCHAR *path) { int result; YCHAR *alt_path; if (!path) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(path) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } if (yaffsfs_alt_dir_path(path, &alt_path) < 0) { yaffsfs_SetError(-ENOMEM); return -1; } if (alt_path) path = alt_path; result = yaffsfs_DoUnlink(path, 1); kfree(alt_path); return result; } void *yaffs_getdev(const YCHAR *path) { struct yaffs_dev *dev = NULL; YCHAR *dummy; dev = yaffsfs_FindDevice(path, &dummy); return (void *)dev; } int yaffs_mount_common(const YCHAR *path, int read_only, int skip_checkpt) { int retVal = -1; int result = YAFFS_FAIL; struct yaffs_dev *dev = NULL; if (!path) { yaffsfs_SetError(-EFAULT); return -1; } yaffs_trace(YAFFS_TRACE_MOUNT, "yaffs: Mounting %s", path); if (yaffsfs_CheckPath(path) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } yaffsfs_Lock(); yaffsfs_InitHandles(); dev = yaffsfs_FindMountPoint(path); if (dev) { if (!dev->is_mounted) { dev->read_only = read_only ? 1 : 0; if (skip_checkpt) { u8 skip = dev->param.skip_checkpt_rd; dev->param.skip_checkpt_rd = 1; result = yaffs_guts_initialise(dev); dev->param.skip_checkpt_rd = skip; } else { result = yaffs_guts_initialise(dev); } if (result == YAFFS_FAIL) yaffsfs_SetError(-ENOMEM); retVal = result ? 0 : -1; } else yaffsfs_SetError(-EBUSY); } else yaffsfs_SetError(-ENODEV); yaffsfs_Unlock(); return retVal; } int yaffs_mount2(const YCHAR *path, int readonly) { return yaffs_mount_common(path, readonly, 0); } int yaffs_mount(const YCHAR *path) { return yaffs_mount_common(path, 0, 0); } int yaffs_sync(const YCHAR *path) { int retVal = -1; struct yaffs_dev *dev = NULL; YCHAR *dummy; if (!path) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(path) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } yaffsfs_Lock(); dev = yaffsfs_FindDevice(path, &dummy); if (dev) { if (!dev->is_mounted) yaffsfs_SetError(-EINVAL); else if (dev->read_only) yaffsfs_SetError(-EROFS); else { yaffs_flush_whole_cache(dev); yaffs_checkpoint_save(dev); retVal = 0; } } else yaffsfs_SetError(-ENODEV); yaffsfs_Unlock(); return retVal; } static int yaffsfs_IsDevBusy(struct yaffs_dev *dev) { int i; struct yaffs_obj *obj; for (i = 0; i < YAFFSFS_N_HANDLES; i++) { obj = yaffsfs_HandleToObject(i); if (obj && obj->my_dev == dev) return 1; } return 0; } int yaffs_remount(const YCHAR *path, int force, int read_only) { int retVal = -1; struct yaffs_dev *dev = NULL; if (!path) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(path) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } yaffsfs_Lock(); dev = yaffsfs_FindMountPoint(path); if (dev) { if (dev->is_mounted) { yaffs_flush_whole_cache(dev); if (force || !yaffsfs_IsDevBusy(dev)) { 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 yaffsfs_SetError(-ENODEV); yaffsfs_Unlock(); return retVal; } int yaffs_unmount2(const YCHAR *path, int force) { int retVal = -1; struct yaffs_dev *dev = NULL; if (!path) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(path) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } yaffsfs_Lock(); dev = yaffsfs_FindMountPoint(path); if (dev) { if (dev->is_mounted) { int inUse; yaffs_flush_whole_cache(dev); yaffs_checkpoint_save(dev); inUse = yaffsfs_IsDevBusy(dev); if (!inUse || force) { if (inUse) yaffsfs_BreakDeviceHandles(dev); yaffs_deinitialise(dev); retVal = 0; } else yaffsfs_SetError(-EBUSY); } else yaffsfs_SetError(-EINVAL); } else yaffsfs_SetError(-ENODEV); yaffsfs_Unlock(); return retVal; } int yaffs_unmount(const YCHAR *path) { return yaffs_unmount2(path, 0); } loff_t yaffs_freespace(const YCHAR *path) { loff_t retVal = -1; struct yaffs_dev *dev = NULL; YCHAR *dummy; if (!path) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(path) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } yaffsfs_Lock(); dev = yaffsfs_FindDevice(path, &dummy); 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; if (!path) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(path) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } 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; if (!path) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(path) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } 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_add_device(struct yaffs_dev *dev) { struct list_head *cfg; /* First check that the device is not in the list. */ list_for_each(cfg, &yaffsfs_deviceList) { if (dev == list_entry(cfg, struct yaffs_dev, dev_list)) return; } 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) { list_del_init(&dev->dev_list); } /* Functions to iterate through devices. NB Use with extreme care! */ static struct list_head *dev_iterator; void yaffs_dev_rewind(void) { dev_iterator = yaffsfs_deviceList.next; } struct yaffs_dev *yaffs_next_dev(void) { struct yaffs_dev *retval; if (!dev_iterator) return NULL; if (dev_iterator == &yaffsfs_deviceList) return NULL; retval = list_entry(dev_iterator, struct yaffs_dev, dev_list); dev_iterator = dev_iterator->next; return retval; } /* Directory search stuff. */ static struct list_head search_contexts; static void yaffsfs_SetDirRewound(struct yaffsfs_DirSearchContxt *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(struct yaffsfs_DirSearchContxt *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; struct yaffsfs_DirSearchContxt *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, struct yaffsfs_DirSearchContxt, others); if (dsc->nextReturn == obj) yaffsfs_DirAdvance(dsc); } } } yaffs_DIR *yaffs_opendir(const YCHAR *dirname) { yaffs_DIR *dir = NULL; struct yaffs_obj *obj = NULL; struct yaffsfs_DirSearchContxt *dsc = NULL; int notDir = 0; int loop = 0; if (!dirname) { yaffsfs_SetError(-EFAULT); return NULL; } if (yaffsfs_CheckPath(dirname) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return NULL; } yaffsfs_Lock(); obj = yaffsfs_FindObject(NULL, dirname, 0, 1, NULL, ¬Dir, &loop); if (!obj && notDir) yaffsfs_SetError(-ENOTDIR); else if (loop) yaffsfs_SetError(-ELOOP); else if (!obj) yaffsfs_SetError(-ENOENT); else if (obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) yaffsfs_SetError(-ENOTDIR); else { int i; for (i = 0, dsc = NULL; i < YAFFSFS_N_DSC && !dsc; i++) { if (!yaffsfs_dsc[i].inUse) dsc = &yaffsfs_dsc[i]; } dir = (yaffs_DIR *) dsc; if (dsc) { memset(dsc, 0, sizeof(struct yaffsfs_DirSearchContxt)); dsc->inUse = 1; 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; } struct yaffs_dirent *yaffs_readdir(yaffs_DIR * dirp) { struct yaffsfs_DirSearchContxt *dsc; struct yaffs_dirent *retVal = NULL; dsc = (struct yaffsfs_DirSearchContxt *) dirp; yaffsfs_Lock(); if (dsc && dsc->inUse) { yaffsfs_SetError(0); 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 should not happen! */ yaffs_strcpy(dsc->de.d_name, _Y("zz")); } 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 yaffs_rewinddir(yaffs_DIR *dirp) { struct yaffsfs_DirSearchContxt *dsc; dsc = (struct yaffsfs_DirSearchContxt *) dirp; yaffsfs_Lock(); yaffsfs_SetDirRewound(dsc); yaffsfs_Unlock(); } int yaffs_closedir(yaffs_DIR *dirp) { struct yaffsfs_DirSearchContxt *dsc; dsc = (struct yaffsfs_DirSearchContxt *) dirp; if (!dsc) { yaffsfs_SetError(-EFAULT); return -1; } yaffsfs_Lock(); dsc->inUse = 0; list_del(&dsc->others); /* unhook from list */ yaffsfs_Unlock(); return 0; } /* End of directory stuff */ int yaffs_symlink(const YCHAR *oldpath, const YCHAR *newpath) { struct yaffs_obj *parent = NULL; struct yaffs_obj *obj; YCHAR *name; int retVal = -1; int mode = 0; /* ignore for now */ int notDir = 0; int loop = 0; if (!oldpath || !newpath) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(newpath) < 0 || yaffsfs_CheckPath(oldpath) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } yaffsfs_Lock(); parent = yaffsfs_FindDirectory(NULL, newpath, &name, 0, ¬Dir, &loop); if (!parent && notDir) yaffsfs_SetError(-ENOTDIR); else if (loop) yaffsfs_SetError(-ELOOP); else if (!parent || yaffs_strnlen(name, 5) < 1) yaffsfs_SetError(-ENOENT); else if (yaffsfs_TooManyObjects(parent->my_dev)) yaffsfs_SetError(-ENFILE); else if (parent->my_dev->read_only) yaffsfs_SetError(-EROFS); else if (parent) { obj = yaffs_create_symlink(parent, name, mode, 0, 0, oldpath); if (obj) retVal = 0; else if (yaffsfs_FindObject (NULL, newpath, 0, 0, NULL, NULL, NULL)) yaffsfs_SetError(-EEXIST); else yaffsfs_SetError(-ENOSPC); } yaffsfs_Unlock(); return retVal; } int yaffs_readlink(const YCHAR *path, YCHAR *buf, int bufsiz) { struct yaffs_obj *obj = NULL; struct yaffs_obj *dir = NULL; int retVal = -1; int notDir = 0; int loop = 0; if (!path || !buf) { yaffsfs_SetError(-EFAULT); return -1; } yaffsfs_Lock(); obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop); if (!dir && notDir) yaffsfs_SetError(-ENOTDIR); else if (loop) yaffsfs_SetError(-ELOOP); else if (!dir || !obj) yaffsfs_SetError(-ENOENT); else if (obj->variant_type != YAFFS_OBJECT_TYPE_SYMLINK) yaffsfs_SetError(-EINVAL); else { YCHAR *alias = obj->variant.symlink_variant.alias; memset(buf, 0, bufsiz); yaffs_strncpy(buf, alias, bufsiz - 1); retVal = 0; } yaffsfs_Unlock(); return retVal; } int yaffs_link(const YCHAR *oldpath, const YCHAR *linkpath) { /* Creates a link called newpath to existing oldpath */ struct yaffs_obj *obj = NULL; struct yaffs_obj *lnk = NULL; struct yaffs_obj *obj_dir = NULL; struct yaffs_obj *lnk_dir = NULL; int retVal = -1; int notDirObj = 0; int notDirLnk = 0; int objLoop = 0; int lnkLoop = 0; YCHAR *newname; if (!oldpath || !linkpath) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(linkpath) < 0 || yaffsfs_CheckPath(oldpath) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } yaffsfs_Lock(); obj = yaffsfs_FindObject(NULL, oldpath, 0, 1, &obj_dir, ¬DirObj, &objLoop); lnk = yaffsfs_FindObject(NULL, linkpath, 0, 0, NULL, NULL, NULL); lnk_dir = yaffsfs_FindDirectory(NULL, linkpath, &newname, 0, ¬DirLnk, &lnkLoop); if ((!obj_dir && notDirObj) || (!lnk_dir && notDirLnk)) yaffsfs_SetError(-ENOTDIR); else if (objLoop || lnkLoop) yaffsfs_SetError(-ELOOP); else if (!obj_dir || !lnk_dir || !obj) yaffsfs_SetError(-ENOENT); else if (obj->my_dev->read_only) yaffsfs_SetError(-EROFS); else if (yaffsfs_TooManyObjects(obj->my_dev)) yaffsfs_SetError(-ENFILE); else if (lnk) yaffsfs_SetError(-EEXIST); else if (lnk_dir->my_dev != obj->my_dev) yaffsfs_SetError(-EXDEV); else { retVal = yaffsfs_CheckNameLength(newname); if (retVal == 0) { lnk = yaffs_link_obj(lnk_dir, newname, obj); if (lnk) retVal = 0; else { yaffsfs_SetError(-ENOSPC); retVal = -1; } } } yaffsfs_Unlock(); return retVal; } int yaffs_mknod(const YCHAR *pathname, mode_t mode, dev_t dev) { pathname = pathname; mode = mode; dev = dev; yaffsfs_SetError(-EINVAL); return -1; } /* * D E B U G F U N C T I O N S */ /* * yaffs_n_handles() * Returns number of handles attached to the object */ int yaffs_n_handles(const YCHAR *path) { struct yaffs_obj *obj; if (!path) { yaffsfs_SetError(-EFAULT); return -1; } if (yaffsfs_CheckPath(path) < 0) { yaffsfs_SetError(-ENAMETOOLONG); return -1; } obj = yaffsfs_FindObject(NULL, path, 0, 1, NULL, NULL, NULL); if (obj) return yaffsfs_CountHandles(obj); else return -1; } int yaffs_get_error(void) { return yaffsfs_GetLastError(); } int yaffs_set_error(int error) { yaffsfs_SetError(error); return 0; } int yaffs_dump_dev(const YCHAR *path) { #if 1 path = path; #else YCHAR *rest; struct yaffs_obj *obj = yaffsfs_FindRoot(path, &rest); if (obj) { struct yaffs_dev *dev = obj->my_dev; printf("\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->n_page_writes, dev->n_page_reads, dev->n_erasures, dev->n_gc_copies, dev->garbageCollections, dev->passiveGarbageCollections); } #endif return 0; }