diff options
Diffstat (limited to 'qemu/roms/u-boot/fs/yaffs2/yaffsfs.c')
| -rw-r--r-- | qemu/roms/u-boot/fs/yaffs2/yaffsfs.c | 3217 |
1 files changed, 0 insertions, 3217 deletions
diff --git a/qemu/roms/u-boot/fs/yaffs2/yaffsfs.c b/qemu/roms/u-boot/fs/yaffs2/yaffsfs.c deleted file mode 100644 index 334598eed..000000000 --- a/qemu/roms/u-boot/fs/yaffs2/yaffsfs.c +++ /dev/null @@ -1,3217 +0,0 @@ -/* - * 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 <charles@aleph1.co.uk> - * - * 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 <div64.h> -#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<<YAFFSFS_RW_SHIFT) - -/* Some forward references */ -static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relativeDirectory, - const YCHAR *path, - int symDepth, int getEquiv, - struct yaffs_obj **dirOut, - int *notDir, int *loop); - -static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj); - -unsigned int yaffs_wr_attempts; - -/* - * Handle management. - * There are open inodes in struct yaffsfs_Inode. - * There are open file descriptors in yaffsfs_FileDes. - * There are open handles in yaffsfs_FileDes. - * - * Things are structured this way to be like the Linux VFS model - * so that interactions with the yaffs guts calls are similar. - * That means more common code paths and less special code. - * That means better testing etc. - * - * We have 3 layers because: - * A handle is different than an fd because you can use dup() - * to create a new handle that accesses the *same* fd. The two - * handles will use the same offset (part of the fd). We only close - * down the fd when there are no more handles accessing it. - * - * More than one fd can currently access one file, but each fd - * has its own permsiions and offset. - */ - -struct yaffsfs_Inode { - int count; /* Number of handles accessing this inode */ - struct yaffs_obj *iObj; -}; - -struct yaffsfs_FileDes { - u8 reading:1; - u8 writing:1; - u8 append:1; - u8 shareRead:1; - u8 shareWrite:1; - int inodeId:12; /* Index to corresponding yaffsfs_Inode */ - int handleCount:10; /* Number of handles for this fd */ - loff_t position; /* current position in file */ -}; - -struct yaffsfs_Handle { - short int fdId; - short int useCount; -}; - - -struct yaffsfs_DirSearchContxt { - struct yaffs_dirent de; /* directory entry */ - YCHAR name[NAME_MAX + 1]; /* name of directory being searched */ - struct yaffs_obj *dirObj; /* ptr to directory being searched */ - struct yaffs_obj *nextReturn; /* obj returned by next readddir */ - struct list_head others; - int offset:20; - unsigned inUse:1; -}; - -static struct yaffsfs_DirSearchContxt yaffsfs_dsc[YAFFSFS_N_DSC]; -static struct yaffsfs_Inode yaffsfs_inode[YAFFSFS_N_HANDLES]; -static struct yaffsfs_FileDes yaffsfs_fd[YAFFSFS_N_HANDLES]; -static struct yaffsfs_Handle yaffsfs_handle[YAFFSFS_N_HANDLES]; - -static int yaffsfs_handlesInitialised; - -unsigned yaffs_set_trace(unsigned tm) -{ - yaffs_trace_mask = tm; - return yaffs_trace_mask; -} - -unsigned yaffs_get_trace(void) -{ - return yaffs_trace_mask; -} - -/* - * yaffsfs_InitHandle - * Inilitalise handle management on start-up. - */ - -static void yaffsfs_InitHandles(void) -{ - int i; - if (yaffsfs_handlesInitialised) - return; - - memset(yaffsfs_inode, 0, sizeof(yaffsfs_inode)); - memset(yaffsfs_fd, 0, sizeof(yaffsfs_fd)); - memset(yaffsfs_handle, 0, sizeof(yaffsfs_handle)); - memset(yaffsfs_dsc, 0, sizeof(yaffsfs_dsc)); - - for (i = 0; i < YAFFSFS_N_HANDLES; i++) - yaffsfs_fd[i].inodeId = -1; - for (i = 0; i < YAFFSFS_N_HANDLES; i++) - yaffsfs_handle[i].fdId = -1; -} - -static struct yaffsfs_Handle *yaffsfs_HandleToPointer(int h) -{ - if (h >= 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 = lldiv(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; -} |