diff options
Diffstat (limited to 'fs/yaffs2/yaffsfs.c')
| -rw-r--r-- | fs/yaffs2/yaffsfs.c | 3432 |
1 files changed, 2570 insertions, 862 deletions
diff --git a/fs/yaffs2/yaffsfs.c b/fs/yaffs2/yaffsfs.c index 111cb348c..9f1397b57 100644 --- a/fs/yaffs2/yaffsfs.c +++ b/fs/yaffs2/yaffsfs.c @@ -1,7 +1,7 @@ /* * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. * - * Copyright (C) 2002-2007 Aleph One Ltd. + * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning <charles@aleph1.co.uk> @@ -11,19 +11,13 @@ * published by the Free Software Foundation. */ -/* XXX U-BOOT XXX */ -#include <common.h> -#include <malloc.h> - #include "yaffsfs.h" #include "yaffs_guts.h" #include "yaffscfg.h" #include "yportenv.h" +#include "yaffs_trace.h" -/* XXX U-BOOT XXX */ -#if 0 -#include <string.h> // for memset -#endif +#include "string.h" #define YAFFSFS_MAX_SYMLINK_DEREFERENCES 5 @@ -31,452 +25,968 @@ #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) -const char *yaffsfs_c_version="$Id: yaffsfs.c,v 1.18 2007/07/18 19:40:38 charles Exp $"; +/* 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); -// configurationList is the list of devices that are supported -static yaffsfs_DeviceConfiguration *yaffsfs_configurationList; +static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj); +unsigned int yaffs_wr_attempts; -/* Some forward references */ -static yaffs_Object *yaffsfs_FindObject(yaffs_Object *relativeDirectory, const char *path, int symDepth); -static void yaffsfs_RemoveObjectCallback(yaffs_Object *obj); +/* + * 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; +}; -// Handle management. -// +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; +}; -unsigned int yaffs_wr_attempts; -typedef struct +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) { - __u8 inUse:1; // this handle is in use - __u8 readOnly:1; // this handle is read only - __u8 append:1; // append only - __u8 exclusive:1; // exclusive - __u32 position; // current position in file - yaffs_Object *obj; // the object -}yaffsfs_Handle; + yaffs_trace_mask = tm; + return yaffs_trace_mask; +} +unsigned yaffs_get_trace(void) +{ + return yaffs_trace_mask; +} -static yaffsfs_Handle yaffsfs_handle[YAFFSFS_N_HANDLES]; +/* + * yaffsfs_InitHandle + * Inilitalise handle management on start-up. + */ -// yaffsfs_InitHandle -/// Inilitalise handles on start-up. -// -static int yaffsfs_InitHandles(void) +static void yaffsfs_InitHandles(void) { int i; - for(i = 0; i < YAFFSFS_N_HANDLES; i++) - { - yaffsfs_handle[i].inUse = 0; - yaffsfs_handle[i].obj = NULL; - } - return 0; + 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; } -yaffsfs_Handle *yaffsfs_GetHandlePointer(int h) +static struct yaffsfs_Handle *yaffsfs_HandleToPointer(int h) { - if(h < 0 || h >= YAFFSFS_N_HANDLES) - { - return NULL; - } + 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 &yaffsfs_handle[h]; + return NULL; } -yaffs_Object *yaffsfs_GetHandleObject(int handle) +static struct yaffsfs_Inode *yaffsfs_HandleToInode(int handle) { - yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle); + struct yaffsfs_FileDes *fd = yaffsfs_HandleToFileDes(handle); - if(h && h->inUse) - { - return h->obj; - } + 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); -//yaffsfs_GetHandle -// Grab a handle (when opening a file) -// + /* 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; +} -static int yaffsfs_GetHandle(void) +/* + * yaffsfs_GetInodeIdForObject + * Grab an inode entry when opening a new inode. + */ +static int yaffsfs_GetInodeIdForObject(struct yaffs_obj *obj) { int i; - yaffsfs_Handle *h; + 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; - for(i = 0; i < YAFFSFS_N_HANDLES; i++) - { - h = yaffsfs_GetHandlePointer(i); - if(!h) - { - // todo bug: should never happen +} + +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; } - if(!h->inUse) - { - memset(h,0,sizeof(yaffsfs_Handle)); - h->inUse=1; + } +} + +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; } -// yaffs_PutHandle -// Let go of a handle (when closing a file) -// -static int yaffsfs_PutHandle(int handle) +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) { - yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle); + struct yaffsfs_FileDes *fd; - if(h) - { - h->inUse = 0; - h->obj = NULL; + 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 search for a directory from a path +/* + * 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(char a, char b) +int yaffsfs_Match(YCHAR a, YCHAR b) +{ + return (yaffs_toupper(a) == yaffs_toupper(b)); +} +#else +int yaffsfs_Match(YCHAR a, YCHAR b) { - // case sensitive + /* case sensitive */ return (a == b); } +#endif -// yaffsfs_FindDevice -// yaffsfs_FindRoot -// Scan the configuration list to find the root. -// Curveballs: Should match paths that end in '/' too -// Curveball2 Might have "/x/ and "/x/y". Need to return the longest match -static yaffs_Device *yaffsfs_FindDevice(const char *path, char **restOfPath) +int yaffsfs_IsPathDivider(YCHAR ch) { - yaffsfs_DeviceConfiguration *cfg = yaffsfs_configurationList; - const char *leftOver; - const char *p; - yaffs_Device *retval = NULL; + 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. - while(cfg && cfg->prefix && cfg->dev) - { + /* + * Check all configs, choose the one that: + * 1) Actually matches a prefix (ie /a amd /abc will not match + * 2) Matches the longest. + */ + list_for_each(cfg, &yaffsfs_deviceList) { + dev = list_entry(cfg, struct yaffs_dev, dev_list); leftOver = path; - p = cfg->prefix; + p = dev->param.name; thisMatchLength = 0; + matching = 1; - while(*p && //unmatched part of prefix - strcmp(p,"/") && // the rest of the prefix is not / (to catch / at end) - *leftOver && - yaffsfs_Match(*p,*leftOver)) - { - p++; - leftOver++; - thisMatchLength++; + while (matching && *p && *leftOver) { + /* Skip over any /s */ + while (yaffsfs_IsPathDivider(*p)) + p++; + + /* Skip over any /s */ + while (yaffsfs_IsPathDivider(*leftOver)) + leftOver++; + + /* Now match the text part */ + while (matching && + *p && !yaffsfs_IsPathDivider(*p) && + *leftOver && !yaffsfs_IsPathDivider(*leftOver)) { + if (yaffsfs_Match(*p, *leftOver)) { + p++; + leftOver++; + thisMatchLength++; + } else { + matching = 0; + } + } } - if((!*p || strcmp(p,"/") == 0) && // end of prefix - (!*leftOver || *leftOver == '/') && // no more in this path name part - (thisMatchLength > longestMatch)) - { - // Matched prefix - *restOfPath = (char *)leftOver; - retval = cfg->dev; + + /* 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; } - cfg++; + } return retval; } -static yaffs_Object *yaffsfs_FindRoot(const char *path, char **restOfPath) +static int yaffsfs_CheckPath(const YCHAR *path) { + int n = 0; + int divs = 0; - yaffs_Device *dev; - - dev= yaffsfs_FindDevice(path,restOfPath); - if(dev && dev->isMounted) - { - return dev->rootDir; + 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 yaffs_Object *yaffsfs_FollowLink(yaffs_Object *obj,int symDepth) +static struct yaffs_obj *yaffsfs_FollowLink(struct yaffs_obj *obj, + int symDepth, int *loop) { - while(obj && obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) - { - char *alias = obj->variant.symLinkVariant.alias; + if (obj) + obj = yaffs_get_equivalent_obj(obj); - if(*alias == '/') - { - // Starts with a /, need to scan from root up - obj = yaffsfs_FindObject(NULL,alias,symDepth++); - } + 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++); - } + /* + * 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 yaffs_Object *yaffsfs_DoFindDirectory(yaffs_Object *startDir,const char *path,char **name,int symDepth) +/* + * yaffsfs_FindDirectory + * Parse a path to determine the directory and the name within the directory. + * + * eg. "/data/xx/ff" --> puts name="ff" and returns the directory "/data/xx" + */ +static struct yaffs_obj *yaffsfs_DoFindDirectory(struct yaffs_obj *startDir, + const YCHAR *path, + YCHAR **name, int symDepth, + int *notDir, int *loop) { - yaffs_Object *dir; - char *restOfPath; - char str[YAFFS_MAX_NAME_LENGTH+1]; + struct yaffs_obj *dir; + YCHAR *restOfPath; + YCHAR str[YAFFS_MAX_NAME_LENGTH + 1]; int i; - if(symDepth > YAFFSFS_MAX_SYMLINK_DEREFERENCES) - { + if (symDepth > YAFFSFS_MAX_SYMLINK_DEREFERENCES) { + if (loop) + *loop = 1; return NULL; } - if(startDir) - { + if (startDir) { dir = startDir; - restOfPath = (char *)path; - } - else - { - dir = yaffsfs_FindRoot(path,&restOfPath); - } + restOfPath = (YCHAR *) path; + } else + dir = yaffsfs_FindRoot(path, &restOfPath); - while(dir) - { - // parse off /. - // curve ball: also throw away surplus '/' - // eg. "/ram/x////ff" gets treated the same as "/ram/x/ff" - while(*restOfPath == '/') - { - restOfPath++; // get rid of '/' - } + while (dir) { + /* + * parse off /. + * curve ball: also throw away surplus '/' + * eg. "/ram/x////ff" gets treated the same as "/ram/x/ff" + */ + while (yaffsfs_IsPathDivider(*restOfPath)) + restOfPath++; /* get rid of '/' */ *name = restOfPath; i = 0; - while(*restOfPath && *restOfPath != '/') - { - if (i < YAFFS_MAX_NAME_LENGTH) - { + while (*restOfPath && !yaffsfs_IsPathDivider(*restOfPath)) { + if (i < YAFFS_MAX_NAME_LENGTH) { str[i] = *restOfPath; - str[i+1] = '\0'; + str[i + 1] = '\0'; i++; } restOfPath++; } - if(!*restOfPath) - { - // got to the end of the string + if (!*restOfPath) + /* got to the end of the string */ return dir; - } - else - { - if(strcmp(str,".") == 0) - { - // Do nothing - } - else if(strcmp(str,"..") == 0) - { + else { + if (yaffs_strcmp(str, _Y(".")) == 0) { + /* Do nothing */ + } else if (yaffs_strcmp(str, _Y("..")) == 0) { dir = dir->parent; - } - else - { - dir = yaffs_FindObjectByName(dir,str); - - while(dir && dir->variantType == YAFFS_OBJECT_TYPE_SYMLINK) - { - - dir = yaffsfs_FollowLink(dir,symDepth); + } else { + dir = yaffs_find_by_name(dir, str); - } + dir = yaffsfs_FollowLink(dir, symDepth, loop); - if(dir && dir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) - { + if (dir && dir->variant_type != + YAFFS_OBJECT_TYPE_DIRECTORY) { + if (notDir) + *notDir = 1; dir = NULL; } + } } } - // directory did not exist. + /* directory did not exist. */ return NULL; } -static yaffs_Object *yaffsfs_FindDirectory(yaffs_Object *relativeDirectory,const char *path,char **name,int symDepth) +static struct yaffs_obj *yaffsfs_FindDirectory(struct yaffs_obj *relDir, + const YCHAR *path, + YCHAR **name, + int symDepth, + int *notDir, int *loop) { - return yaffsfs_DoFindDirectory(relativeDirectory,path,name,symDepth); + return yaffsfs_DoFindDirectory(relDir, path, name, symDepth, notDir, + loop); } -// yaffsfs_FindObject turns a path for an existing object into the object -// -static yaffs_Object *yaffsfs_FindObject(yaffs_Object *relativeDirectory, const char *path,int symDepth) +/* + * yaffsfs_FindObject turns a path for an existing object into the object + */ +static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relDir, + const YCHAR *path, int symDepth, + int getEquiv, + struct yaffs_obj **dirOut, + int *notDir, int *loop) { - yaffs_Object *dir; - char *name; + 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; - dir = yaffsfs_FindDirectory(relativeDirectory,path,&name,symDepth); + if (getEquiv) + obj = yaffs_get_equivalent_obj(obj); - if(dir && *name) - { - return yaffs_FindObjectByName(dir,name); + 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++; } - return dir; + 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(const char *path, int oflag, int mode) +int yaffs_open_sharing(const YCHAR *path, int oflag, int mode, int sharing) { - yaffs_Object *obj = NULL; - yaffs_Object *dir = NULL; - char *name; + struct yaffs_obj *obj = NULL; + struct yaffs_obj *dir = NULL; + YCHAR *name; int handle = -1; - yaffsfs_Handle *h = NULL; - int alreadyOpen = 0; - int alreadyExclusive = 0; + 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; - int i; + if (!path) { + yaffsfs_SetError(-EFAULT); + return -1; + } + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } - // todo sanity check oflag (eg. can't have O_TRUNC without WRONLY or RDWR + /* 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); - yaffsfs_Lock(); + /* Todo: Are there any more flag combos to sanitise ? */ - handle = yaffsfs_GetHandle(); + /* Figure out if reading or writing is requested */ - if(handle >= 0) - { + readRequested = (rwflags == O_RDWR || rwflags == O_RDONLY) ? 1 : 0; + writeRequested = (rwflags == O_RDWR || rwflags == O_WRONLY) ? 1 : 0; - h = yaffsfs_GetHandlePointer(handle); + yaffsfs_Lock(); + handle = yaffsfs_NewHandleAndFileDes(); - // try to find the exisiting object - obj = yaffsfs_FindObject(NULL,path,0); + if (handle < 0) { + yaffsfs_SetError(-ENFILE); + errorReported = 1; + } else { - if(obj && obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) - { + fd = yaffsfs_HandleToFileDes(handle); - obj = yaffsfs_FollowLink(obj,symDepth++); - } + /* try to find the exisiting object */ + obj = yaffsfs_FindObject(NULL, path, 0, 1, NULL, NULL, NULL); - if(obj) - { - // Check if the object is already in use - alreadyOpen = alreadyExclusive = 0; + obj = yaffsfs_FollowLink(obj, symDepth++, &loop); - for(i = 0; i <= YAFFSFS_N_HANDLES; i++) - { + if (obj && + obj->variant_type != YAFFS_OBJECT_TYPE_FILE && + obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) + obj = NULL; - if(i != handle && - yaffsfs_handle[i].inUse && - obj == yaffsfs_handle[i].obj) - { - alreadyOpen = 1; - if(yaffsfs_handle[i].exclusive) - { - alreadyExclusive = 1; - } - } - } + if (obj) { + + /* The file already exists or it might be a directory */ - if(((oflag & O_EXCL) && alreadyOpen) || alreadyExclusive) - { + /* 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 - if((oflag & O_EXCL) && (oflag & O_CREAT)) - { + /* 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( (oflag & (O_RDWR | O_WRONLY)) == 0 && // ie O_RDONLY - !(obj->yst_mode & S_IREAD)) - { + /* Check file permissions */ + if (readRequested && !(obj->yst_mode & S_IREAD)) openDenied = 1; - } - if( (oflag & O_RDWR) && - !(obj->yst_mode & S_IREAD)) - { + if (writeRequested && !(obj->yst_mode & S_IWRITE)) openDenied = 1; - } - if( (oflag & (O_RDWR | O_WRONLY)) && - !(obj->yst_mode & S_IWRITE)) - { + 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; + } + } - else if((oflag & O_CREAT)) - { - // Let's see if we can create this file - dir = yaffsfs_FindDirectory(NULL,path,&name,0); - if(dir) - { - obj = yaffs_MknodFile(dir,name,mode,0,0); + if ((!sharedReadAllowed && readRequested) || + (!shareRead && alreadyReading) || + (!sharedWriteAllowed && writeRequested) || + (!shareWrite && alreadyWriting)) { + openDenied = 1; + yaffsfs_SetError(-EBUSY); + errorReported = 1; + } } - else - { + + } + + /* 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 && !openDenied) - { - h->obj = obj; - h->inUse = 1; - h->readOnly = (oflag & (O_WRONLY | O_RDWR)) ? 0 : 1; - h->append = (oflag & O_APPEND) ? 1 : 0; - h->exclusive = (oflag & O_EXCL) ? 1 : 0; - h->position = 0; + 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); - obj->inUse++; - if((oflag & O_TRUNC) && !h->readOnly) - { - //todo truncate - yaffs_ResizeFile(obj,0); + if (!obj && !errorReported) { + yaffsfs_SetError(-ENOSPC); + errorReported = 1; } + } + if (!obj && dir && !errorReported && !(oflag & O_CREAT)) { + yaffsfs_SetError(-ENOENT); + errorReported = 1; } - else - { - yaffsfs_PutHandle(handle); - if(!errorReported) - { - yaffsfs_SetError(-EACCESS); - 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(); @@ -484,32 +994,68 @@ int yaffs_open(const char *path, int oflag, int mode) return handle; } -int yaffs_close(int fd) +int yaffs_open(const YCHAR *path, int oflag, int mode) { - yaffsfs_Handle *h = NULL; - int retVal = 0; + 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(); - h = yaffsfs_GetHandlePointer(fd); + obj = yaffsfs_HandleToObject(handle); - if(h && h->inUse) - { - // clean up - yaffs_FlushFile(h->obj,1); - h->obj->inUse--; - if(h->obj->inUse <= 0 && h->obj->unlinked) - { - yaffs_DeleteFile(h->obj); - } - yaffsfs_PutHandle(fd); + if (!obj) + yaffsfs_SetError(-EBADF); + else if (obj->my_dev->read_only) + yaffsfs_SetError(-EROFS); + else { + yaffs_flush_file(obj, 1, datasync); retVal = 0; } - else - { - // bad handle + + 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); - retVal = -1; + else { + /* clean up */ + yaffs_flush_file(obj, 1, 0); + yaffsfs_PutHandle(handle); + retVal = 0; } yaffsfs_Unlock(); @@ -517,378 +1063,774 @@ int yaffs_close(int fd) return retVal; } -int yaffs_read(int fd, void *buf, unsigned int nbyte) +int yaffsfs_do_read(int handle, void *vbuf, unsigned int nbyte, + int isPread, loff_t offset) { - yaffsfs_Handle *h = NULL; - yaffs_Object *obj = NULL; - int pos = 0; - int nRead = -1; - int maxRead; + 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(); - h = yaffsfs_GetHandlePointer(fd); - obj = yaffsfs_GetHandleObject(fd); + fd = yaffsfs_HandleToFileDes(handle); + obj = yaffsfs_HandleToObject(handle); - if(!h || !obj) - { - // bad handle + if (!fd || !obj) { + /* bad handle */ yaffsfs_SetError(-EBADF); - } - else if( h && obj) - { - pos= h->position; - if(yaffs_GetObjectFileLength(obj) > pos) - { - maxRead = yaffs_GetObjectFileLength(obj) - pos; - } + 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) - { + 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(nbyte > 0) - { - nRead = yaffs_ReadDataFromFile(obj,buf,pos,nbyte); - if(nRead >= 0) - { - h->position = pos + nRead; + if (nRead > 0) { + totalRead += nRead; + pos += nRead; + buf += nRead; } + + if (nRead == nToRead) + nbyte -= nRead; else - { - //todo error + nbyte = 0; /* no more to read */ + + if (nbyte > 0) { + yaffsfs_Unlock(); + yaffsfs_Lock(); } + } - else - { - nRead = 0; + + yaffsfs_PutHandle(handle); + + if (!isPread) { + if (totalRead >= 0) + fd->position = startPos + totalRead; + else + yaffsfs_SetError(-EINVAL); } } yaffsfs_Unlock(); + return (totalRead >= 0) ? totalRead : -1; - return (nRead >= 0) ? nRead : -1; +} +int yaffs_read(int handle, void *buf, unsigned int nbyte) +{ + return yaffsfs_do_read(handle, buf, nbyte, 0, 0); } -int yaffs_write(int fd, const void *buf, unsigned int nbyte) +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) { - yaffsfs_Handle *h = NULL; - yaffs_Object *obj = NULL; - int pos = 0; - int nWritten = -1; - int writeThrough = 0; + 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(); - h = yaffsfs_GetHandlePointer(fd); - obj = yaffsfs_GetHandleObject(fd); + fd = yaffsfs_HandleToFileDes(handle); + obj = yaffsfs_HandleToObject(handle); - if(!h || !obj) - { - // bad handle + if (!fd || !obj) { + /* bad handle */ yaffsfs_SetError(-EBADF); - } - else if( h && obj && h->readOnly) - { - // todo error - } - else if( h && obj) - { - if(h->append) - { - pos = yaffs_GetObjectFileLength(obj); - } + 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 - { - pos = h->position; - } + startPos = fd->position; - nWritten = yaffs_WriteDataToFile(obj,buf,pos,nbyte,writeThrough); + yaffsfs_GetHandle(handle); + pos = startPos; + endPos = pos + nbyte; - if(nWritten >= 0) - { - h->position = pos + nWritten; + if (pos < 0 || pos > YAFFS_MAX_FILE_SIZE || + nbyte > YAFFS_MAX_FILE_SIZE || + endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE) { + totalWritten = -1; + nbyte = 0; } - else - { - //todo error + + 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); - return (nWritten >= 0) ? nWritten : -1; + yaffsfs_Unlock(); + return (result) ? 0 : -1; } -int yaffs_truncate(int fd, off_t newSize) +int yaffs_ftruncate(int handle, loff_t new_size) { - yaffsfs_Handle *h = NULL; - yaffs_Object *obj = NULL; + struct yaffsfs_FileDes *fd = NULL; + struct yaffs_obj *obj = NULL; int result = 0; yaffsfs_Lock(); - h = yaffsfs_GetHandlePointer(fd); - obj = yaffsfs_GetHandleObject(fd); + fd = yaffsfs_HandleToFileDes(handle); + obj = yaffsfs_HandleToObject(handle); - if(!h || !obj) - { - // bad 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_ResizeFile(obj,newSize); - } + /* resize the file */ + result = yaffs_resize_file(obj, new_size); yaffsfs_Unlock(); - return (result) ? 0 : -1; } -off_t yaffs_lseek(int fd, off_t offset, int whence) +loff_t yaffs_lseek(int handle, loff_t offset, int whence) { - yaffsfs_Handle *h = NULL; - yaffs_Object *obj = NULL; - int pos = -1; - int fSize = -1; + struct yaffsfs_FileDes *fd = NULL; + struct yaffs_obj *obj = NULL; + loff_t pos = -1; + loff_t fSize = -1; yaffsfs_Lock(); - h = yaffsfs_GetHandlePointer(fd); - obj = yaffsfs_GetHandleObject(fd); + fd = yaffsfs_HandleToFileDes(handle); + obj = yaffsfs_HandleToObject(handle); - if(!h || !obj) - { - // bad handle + if (!fd || !obj) yaffsfs_SetError(-EBADF); - } - else if(whence == SEEK_SET) - { - if(offset >= 0) - { - pos = offset; - } - } - else if(whence == SEEK_CUR) - { - if( (h->position + offset) >= 0) - { - pos = (h->position + offset); - } - } - else if(whence == SEEK_END) - { - fSize = yaffs_GetObjectFileLength(obj); - if(fSize >= 0 && (fSize + offset) >= 0) - { - pos = fSize + offset; + 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) - { - h->position = pos; - } - else - { - // todo error + 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 char *path,int isDirectory) +int yaffsfs_DoUnlink(const YCHAR *path, int isDirectory) { - yaffs_Object *dir = NULL; - yaffs_Object *obj = NULL; - char *name; + struct yaffs_obj *dir = NULL; + struct yaffs_obj *obj = NULL; + YCHAR *name; int result = YAFFS_FAIL; + 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); - dir = yaffsfs_FindDirectory(NULL,path,&name,0); - if(!dir) - { + 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(!obj) - { + else if (loop) + yaffsfs_SetError(-ELOOP); + else if (!dir) yaffsfs_SetError(-ENOENT); - } - else if(!isDirectory && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) - { + 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->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) - { + else if (isDirectory && + obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) yaffsfs_SetError(-ENOTDIR); - } - else - { - result = yaffs_Unlink(dir,name); + else 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) - { + if (result == YAFFS_FAIL && isDirectory) yaffsfs_SetError(-ENOTEMPTY); - } } yaffsfs_Unlock(); - // todo error - return (result == YAFFS_FAIL) ? -1 : 0; } -int yaffs_rmdir(const char *path) -{ - return yaffsfs_DoUnlink(path,1); -} -int yaffs_unlink(const char *path) +int yaffs_unlink(const YCHAR *path) { - return yaffsfs_DoUnlink(path,0); + return yaffsfs_DoUnlink(path, 0); } -int yaffs_rename(const char *oldPath, const char *newPath) +int yaffs_rename(const YCHAR *oldPath, const YCHAR *newPath) { - yaffs_Object *olddir = NULL; - yaffs_Object *newdir = NULL; - yaffs_Object *obj = NULL; - char *oldname; - char *newname; - int result= YAFFS_FAIL; - int renameAllowed = 1; + 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; - yaffsfs_Lock(); + YCHAR *alt_newpath = NULL; + + if (!oldPath || !newPath) { + yaffsfs_SetError(-EFAULT); + return -1; + } - olddir = yaffsfs_FindDirectory(NULL,oldPath,&oldname,0); - newdir = yaffsfs_FindDirectory(NULL,newPath,&newname,0); - obj = yaffsfs_FindObject(NULL,oldPath,0); + if (yaffsfs_CheckPath(oldPath) < 0 || yaffsfs_CheckPath(newPath) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } - if(!olddir || !newdir || !obj) - { - // bad file - yaffsfs_SetError(-EBADF); - renameAllowed = 0; + if (yaffsfs_alt_dir_path(newPath, &alt_newpath) < 0) { + yaffsfs_SetError(-ENOMEM); + return -1; } - else if(olddir->myDev != newdir->myDev) - { - // oops must be on same device - // todo error + 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); - renameAllowed = 0; - } - else if(obj && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) - { - // It is a directory, check that it is not being renamed to - // being its own decendent. - // Do this by tracing from the new directory back to the root, checking for obj + 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 + */ - yaffs_Object *xx = newdir; + struct yaffs_obj *xx = newdir; - while( renameAllowed && xx) - { - if(xx == obj) - { - renameAllowed = 0; - } + while (rename_allowed && xx) { + if (xx == obj) + rename_allowed = 0; xx = xx->parent; } - if(!renameAllowed) yaffsfs_SetError(-EACCESS); + if (!rename_allowed) + yaffsfs_SetError(-EINVAL); } - if(renameAllowed) - { - result = yaffs_RenameObject(olddir,oldname,newdir,newname); - } + 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(yaffs_Object *obj,struct yaffs_stat *buf) +static int yaffsfs_DoStat(struct yaffs_obj *obj, struct yaffs_stat *buf) { int retVal = -1; - if(obj) - { - obj = yaffs_GetEquivalentObject(obj); - } + obj = yaffs_get_equivalent_obj(obj); - if(obj && buf) - { - buf->st_dev = (int)obj->myDev->genericDevice; - buf->st_ino = obj->objectId; - buf->st_mode = obj->yst_mode & ~S_IFMT; // clear out file type bits + 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->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) - { + if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) buf->st_mode |= S_IFDIR; - } - else if(obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) - { + else if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) buf->st_mode |= S_IFLNK; - } - else if(obj->variantType == YAFFS_OBJECT_TYPE_FILE) - { + else if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) buf->st_mode |= S_IFREG; - } - buf->st_nlink = yaffs_GetObjectLinkCount(obj); - buf->st_uid = 0; - buf->st_gid = 0;; - buf->st_rdev = obj->yst_rdev; - buf->st_size = yaffs_GetObjectFileLength(obj); - buf->st_blksize = obj->myDev->nDataBytesPerChunk; - buf->st_blocks = (buf->st_size + buf->st_blksize -1)/buf->st_blksize; - buf->yst_atime = obj->yst_atime; - buf->yst_ctime = obj->yst_ctime; - buf->yst_mtime = obj->yst_mtime; + buf->st_nlink = yaffs_get_obj_link_count(obj); + buf->st_uid = 0; + buf->st_gid = 0; + buf->st_rdev = obj->yst_rdev; + buf->st_size = yaffs_get_obj_length(obj); + buf->st_blksize = obj->my_dev->data_bytes_per_chunk; + buf->st_blocks = (buf->st_size + buf->st_blksize - 1) / + buf->st_blksize; +#if CONFIG_YAFFS_WINCE + buf->yst_wince_atime[0] = obj->win_atime[0]; + buf->yst_wince_atime[1] = obj->win_atime[1]; + buf->yst_wince_ctime[0] = obj->win_ctime[0]; + buf->yst_wince_ctime[1] = obj->win_ctime[1]; + buf->yst_wince_mtime[0] = obj->win_mtime[0]; + buf->yst_wince_mtime[1] = obj->win_mtime[1]; +#else + buf->yst_atime = obj->yst_atime; + buf->yst_ctime = obj->yst_ctime; + buf->yst_mtime = obj->yst_mtime; +#endif retVal = 0; } return retVal; } -static int yaffsfs_DoStatOrLStat(const char *path, struct yaffs_stat *buf,int doLStat) +static int yaffsfs_DoStatOrLStat(const YCHAR *path, + struct yaffs_stat *buf, int doLStat) { - yaffs_Object *obj; + struct yaffs_obj *obj = 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_FindObject(NULL,path,0); + obj = yaffsfs_HandleToObject(fd); + + if (obj) + retVal = yaffsfs_DoStat(obj, buf); + else + /* bad handle */ + yaffsfs_SetError(-EBADF); + + yaffsfs_Unlock(); + + return retVal; +} - if(!doLStat && obj) - { - obj = yaffsfs_FollowLink(obj,0); +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(obj) - { - retVal = yaffsfs_DoStat(obj,buf); + 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 - { - // todo error not found + 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(); @@ -897,33 +1839,41 @@ static int yaffsfs_DoStatOrLStat(const char *path, struct yaffs_stat *buf,int do } -int yaffs_stat(const char *path, struct yaffs_stat *buf) +int yaffs_setxattr(const YCHAR *path, const char *name, + const void *data, int size, int flags) { - return yaffsfs_DoStatOrLStat(path,buf,0); + return yaffs_do_setxattr(path, name, data, size, flags, 1); } -int yaffs_lstat(const char *path, struct yaffs_stat *buf) +int yaffs_lsetxattr(const YCHAR *path, const char *name, + const void *data, int size, int flags) { - return yaffsfs_DoStatOrLStat(path,buf,1); + return yaffs_do_setxattr(path, name, data, size, flags, 0); } -int yaffs_fstat(int fd, struct yaffs_stat *buf) +int yaffs_fsetxattr(int fd, const char *name, + const void *data, int size, int flags) { - yaffs_Object *obj; + struct yaffs_obj *obj; int retVal = -1; + if (!name || !data) { + yaffsfs_SetError(-EFAULT); + return -1; + } + yaffsfs_Lock(); - obj = yaffsfs_GetHandleObject(fd); + obj = yaffsfs_HandleToObject(fd); - if(obj) - { - retVal = yaffsfs_DoStat(obj,buf); - } - else - { - // bad handle + 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(); @@ -931,43 +1881,128 @@ int yaffs_fstat(int fd, struct yaffs_stat *buf) return retVal; } -static int yaffsfs_DoChMod(yaffs_Object *obj,mode_t mode) +static int yaffs_do_getxattr(const YCHAR *path, const char *name, + void *data, int size, int follow) { - int result = YAFFS_FAIL; + struct yaffs_obj *obj; + struct yaffs_obj *dir; + int retVal = -1; + int notDir = 0; + int loop = 0; - if(obj) - { - obj = yaffs_GetEquivalentObject(obj); + if (!path || !name || !data) { + yaffsfs_SetError(-EFAULT); + return -1; } - if(obj) - { - obj->yst_mode = mode; - obj->dirty = 1; - result = yaffs_FlushFile(obj,0); + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; } - return result == YAFFS_OK ? 0 : -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_chmod(const char *path, mode_t mode) +int yaffs_fgetxattr(int fd, const char *name, void *data, int size) { - yaffs_Object *obj; + struct yaffs_obj *obj; int retVal = -1; + if (!name || !data) { + yaffsfs_SetError(-EFAULT); + return -1; + } + yaffsfs_Lock(); - obj = yaffsfs_FindObject(NULL,path,0); + 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); - if(obj) - { - retVal = yaffsfs_DoChMod(obj,mode); + 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; } - else - { - // todo error not found + + 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(); @@ -976,317 +2011,906 @@ int yaffs_chmod(const char *path, mode_t mode) } +int yaffs_listxattr(const YCHAR *path, char *data, int size) +{ + return yaffs_do_listxattr(path, data, size, 1); +} -int yaffs_fchmod(int fd, mode_t mode) +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) { - yaffs_Object *obj; + struct yaffs_obj *obj; int retVal = -1; + if (!data) { + yaffsfs_SetError(-EFAULT); + return -1; + } + yaffsfs_Lock(); - obj = yaffsfs_GetHandleObject(fd); + obj = yaffsfs_HandleToObject(fd); - if(obj) - { - retVal = yaffsfs_DoChMod(obj,mode); - } - else - { - // bad handle + 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_mkdir(const char *path, mode_t mode) +int yaffs_fremovexattr(int fd, const char *name) { - yaffs_Object *parent = NULL; - yaffs_Object *dir = NULL; - char *name; - int retVal= -1; + struct yaffs_obj *obj; + + int retVal = -1; + + if (!name) { + yaffsfs_SetError(-EFAULT); + return -1; + } yaffsfs_Lock(); - parent = yaffsfs_FindDirectory(NULL,path,&name,0); - if(parent) - dir = yaffs_MknodDirectory(parent,name,mode,0,0); - if(dir) - { + 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 - { - yaffsfs_SetError(-ENOSPC); // just assume no space for now - retVal = -1; + 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_mount(const char *path) +int yaffs_mkdir(const YCHAR *path, mode_t mode) { - int retVal=-1; - int result=YAFFS_FAIL; - yaffs_Device *dev=NULL; - char *dummy; + 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; - T(YAFFS_TRACE_ALWAYS,("yaffs: Mounting %s\n",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; yaffsfs_Lock(); - dev = yaffsfs_FindDevice(path,&dummy); - if(dev) - { - if(!dev->isMounted) - { - result = yaffs_GutsInitialise(dev); - if(result == YAFFS_FAIL) - { - // todo error - mount failed - yaffsfs_SetError(-ENOMEM); + 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 - { - //todo error - already mounted. + } else yaffsfs_SetError(-EBUSY); - } - } - else - { - // todo error - no device + } else yaffsfs_SetError(-ENODEV); - } + yaffsfs_Unlock(); return retVal; } -int yaffs_unmount(const char *path) +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; - yaffs_Device *dev=NULL; - char *dummy; + 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->isMounted) - { - int i; - int inUse; + dev = yaffsfs_FindDevice(path, &dummy); + if (dev) { + if (!dev->is_mounted) + yaffsfs_SetError(-EINVAL); + else if (dev->read_only) + yaffsfs_SetError(-EROFS); + else { - yaffs_FlushEntireDeviceCache(dev); - yaffs_CheckpointSave(dev); + yaffs_flush_whole_cache(dev); + yaffs_checkpoint_save(dev); + retVal = 0; - for(i = inUse = 0; i < YAFFSFS_N_HANDLES && !inUse; i++) - { - if(yaffsfs_handle[i].inUse && yaffsfs_handle[i].obj->myDev == dev) - { - inUse = 1; // the device is in use, can't unmount - } - } + } + } else + yaffsfs_SetError(-ENODEV); - if(!inUse) - { - yaffs_Deinitialise(dev); + 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 - { - // todo error can't unmount as files are open + } else yaffsfs_SetError(-EBUSY); - } - } - else - { - //todo error - not mounted. + } else yaffsfs_SetError(-EINVAL); - } - } - else - { - // todo error - no device + } else yaffsfs_SetError(-ENODEV); - } + yaffsfs_Unlock(); return retVal; } -loff_t yaffs_freespace(const char *path) +int yaffs_unmount2(const YCHAR *path, int force) { - loff_t retVal=-1; - yaffs_Device *dev=NULL; - char *dummy; + 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_FindDevice(path,&dummy); - if(dev && dev->isMounted) - { - retVal = yaffs_GetNumberOfFreeChunks(dev); - retVal *= dev->nDataBytesPerChunk; + 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; } - else - { - yaffsfs_SetError(-EINVAL); + + 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; + } -void yaffs_initialise(yaffsfs_DeviceConfiguration *cfgList) -{ + 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_DeviceConfiguration *cfg; + yaffsfs_Unlock(); + return retVal; +} - yaffsfs_configurationList = cfgList; +int yaffs_inodecount(const YCHAR *path) +{ + loff_t retVal = -1; + struct yaffs_dev *dev = NULL; + YCHAR *dummy; - yaffsfs_InitHandles(); + if (!path) { + yaffsfs_SetError(-EFAULT); + return -1; + } - cfg = yaffsfs_configurationList; + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } - while(cfg && cfg->prefix && cfg->dev) - { - cfg->dev->isMounted = 0; - cfg->dev->removeObjectCallback = yaffsfs_RemoveObjectCallback; - cfg++; + 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; + } -// -// Directory search stuff. + dev->is_mounted = 0; + dev->param.remove_obj_fn = yaffsfs_RemoveObjectCallback; -// -// Directory search context -// -// NB this is an opaque structure. + if (!dev->dev_list.next) + INIT_LIST_HEAD(&dev->dev_list); + list_add(&dev->dev_list, &yaffsfs_deviceList); +} -typedef struct +void yaffs_remove_device(struct yaffs_dev *dev) { - __u32 magic; - yaffs_dirent de; /* directory entry being used by this dsc */ - char name[NAME_MAX+1]; /* name of directory being searched */ - yaffs_Object *dirObj; /* ptr to directory being searched */ - yaffs_Object *nextReturn; /* obj to be returned by next readddir */ - int offset; - struct list_head others; -} yaffsfs_DirectorySearchContext; + 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; -static struct list_head search_contexts; + retval = list_entry(dev_iterator, struct yaffs_dev, dev_list); + dev_iterator = dev_iterator->next; + return retval; +} +/* Directory search stuff. */ -static void yaffsfs_SetDirRewound(yaffsfs_DirectorySearchContext *dsc) +static struct list_head search_contexts; + +static void yaffsfs_SetDirRewound(struct yaffsfs_DirSearchContxt *dsc) { - if(dsc && - dsc->dirObj && - dsc->dirObj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY){ + if (dsc && + dsc->dirObj && + dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) { - dsc->offset = 0; + dsc->offset = 0; - if( list_empty(&dsc->dirObj->variant.directoryVariant.children)){ - dsc->nextReturn = NULL; - } else { - dsc->nextReturn = list_entry(dsc->dirObj->variant.directoryVariant.children.next, - yaffs_Object,siblings); - } + if (list_empty(&dsc->dirObj->variant.dir_variant.children)) + dsc->nextReturn = NULL; + else + dsc->nextReturn = + list_entry(dsc->dirObj->variant.dir_variant. + children.next, struct yaffs_obj, + siblings); } else { /* Hey someone isn't playing nice! */ } } -static void yaffsfs_DirAdvance(yaffsfs_DirectorySearchContext *dsc) +static void yaffsfs_DirAdvance(struct yaffsfs_DirSearchContxt *dsc) { - if(dsc && - dsc->dirObj && - dsc->dirObj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY){ + if (dsc && + dsc->dirObj && + dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) { - if( dsc->nextReturn == NULL || - list_empty(&dsc->dirObj->variant.directoryVariant.children)){ - dsc->nextReturn = NULL; - } else { - struct list_head *next = dsc->nextReturn->siblings.next; + 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.directoryVariant.children) - dsc->nextReturn = NULL; /* end of list */ - else - dsc->nextReturn = list_entry(next,yaffs_Object,siblings); - } + 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(yaffs_Object *obj) +static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj) { struct list_head *i; - yaffsfs_DirectorySearchContext *dsc; + struct yaffsfs_DirSearchContxt *dsc; /* if search contexts not initilised then skip */ - if(!search_contexts.next) + if (!search_contexts.next) return; - /* Iteratethrough the directory search contexts. + /* 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) { + list_for_each(i, &search_contexts) { if (i) { - dsc = list_entry(i, yaffsfs_DirectorySearchContext,others); - if(dsc->nextReturn == obj) + dsc = list_entry(i, struct yaffsfs_DirSearchContxt, + others); + if (dsc->nextReturn == obj) yaffsfs_DirAdvance(dsc); } } } -yaffs_DIR *yaffs_opendir(const char *dirname) +yaffs_DIR *yaffs_opendir(const YCHAR *dirname) { yaffs_DIR *dir = NULL; - yaffs_Object *obj = NULL; - yaffsfs_DirectorySearchContext *dsc = 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); + 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]; + } - if(obj && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) - { + dir = (yaffs_DIR *) dsc; - dsc = YMALLOC(sizeof(yaffsfs_DirectorySearchContext)); - dir = (yaffs_DIR *)dsc; - if(dsc) - { - memset(dsc,0,sizeof(yaffsfs_DirectorySearchContext)); - dsc->magic = YAFFS_MAGIC; + if (dsc) { + memset(dsc, 0, sizeof(struct yaffsfs_DirSearchContxt)); + dsc->inUse = 1; dsc->dirObj = obj; - strncpy(dsc->name,dirname,NAME_MAX); + yaffs_strncpy(dsc->name, dirname, NAME_MAX); INIT_LIST_HEAD(&dsc->others); - if(!search_contexts.next) + if (!search_contexts.next) INIT_LIST_HEAD(&search_contexts); - list_add(&dsc->others,&search_contexts); - yaffsfs_SetDirRewound(dsc); } + list_add(&dsc->others, &search_contexts); + yaffsfs_SetDirRewound(dsc); + } } @@ -1295,35 +2919,34 @@ yaffs_DIR *yaffs_opendir(const char *dirname) return dir; } -struct yaffs_dirent *yaffs_readdir(yaffs_DIR *dirp) +struct yaffs_dirent *yaffs_readdir(yaffs_DIR * dirp) { - yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp; + struct yaffsfs_DirSearchContxt *dsc; struct yaffs_dirent *retVal = NULL; + dsc = (struct yaffsfs_DirSearchContxt *) dirp; yaffsfs_Lock(); - if(dsc && dsc->magic == YAFFS_MAGIC){ + if (dsc && dsc->inUse) { yaffsfs_SetError(0); - if(dsc->nextReturn){ - dsc->de.d_ino = yaffs_GetEquivalentObject(dsc->nextReturn)->objectId; + 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_GetObjectName(dsc->nextReturn,dsc->de.d_name,NAME_MAX); - if(strlen(dsc->de.d_name) == 0) - { - // this should not happen! - strcpy(dsc->de.d_name,"zz"); + 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 - { + } else yaffsfs_SetError(-EBADF); - } yaffsfs_Unlock(); @@ -1331,10 +2954,11 @@ struct yaffs_dirent *yaffs_readdir(yaffs_DIR *dirp) } - void yaffs_rewinddir(yaffs_DIR *dirp) { - yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp; + struct yaffsfs_DirSearchContxt *dsc; + + dsc = (struct yaffsfs_DirSearchContxt *) dirp; yaffsfs_Lock(); @@ -1343,41 +2967,67 @@ void yaffs_rewinddir(yaffs_DIR *dirp) yaffsfs_Unlock(); } - int yaffs_closedir(yaffs_DIR *dirp) { - yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp; + struct yaffsfs_DirSearchContxt *dsc; + + dsc = (struct yaffsfs_DirSearchContxt *) dirp; + + if (!dsc) { + yaffsfs_SetError(-EFAULT); + return -1; + } yaffsfs_Lock(); - dsc->magic = 0; - list_del(&dsc->others); /* unhook from list */ - YFREE(dsc); + dsc->inUse = 0; + list_del(&dsc->others); /* unhook from list */ yaffsfs_Unlock(); return 0; } -// end of directory stuff - +/* End of directory stuff */ -int yaffs_symlink(const char *oldpath, const char *newpath) +int yaffs_symlink(const YCHAR *oldpath, const YCHAR *newpath) { - yaffs_Object *parent = NULL; - yaffs_Object *obj; - char *name; - int retVal= -1; - int mode = 0; // ignore for now + 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; - yaffsfs_Lock(); - parent = yaffsfs_FindDirectory(NULL,newpath,&name,0); - obj = yaffs_MknodSymLink(parent,name,mode,0,0,oldpath); - if(obj) - { - retVal = 0; + if (!oldpath || !newpath) { + yaffsfs_SetError(-EFAULT); + return -1; } - else - { - yaffsfs_SetError(-ENOSPC); // just assume no space for now - retVal = -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(); @@ -1386,90 +3036,98 @@ int yaffs_symlink(const char *oldpath, const char *newpath) } -int yaffs_readlink(const char *path, char *buf, int bufsiz) +int yaffs_readlink(const YCHAR *path, YCHAR *buf, int bufsiz) { - yaffs_Object *obj = NULL; - int retVal; + 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); + obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop); - if(!obj) - { + if (!dir && notDir) + yaffsfs_SetError(-ENOTDIR); + else if (loop) + yaffsfs_SetError(-ELOOP); + else if (!dir || !obj) yaffsfs_SetError(-ENOENT); - retVal = -1; - } - else if(obj->variantType != YAFFS_OBJECT_TYPE_SYMLINK) - { + else if (obj->variant_type != YAFFS_OBJECT_TYPE_SYMLINK) yaffsfs_SetError(-EINVAL); - retVal = -1; - } - else - { - char *alias = obj->variant.symLinkVariant.alias; - memset(buf,0,bufsiz); - strncpy(buf,alias,bufsiz - 1); + 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 char *oldpath, const char *newpath) +int yaffs_link(const YCHAR *oldpath, const YCHAR *linkpath) { - // Creates a link called newpath to existing oldpath - yaffs_Object *obj = NULL; - yaffs_Object *target = NULL; - int retVal = 0; + /* 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); - target = yaffsfs_FindObject(NULL,newpath,0); + 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) - { + 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); - retVal = -1; - } - else if(target) - { + 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); - retVal = -1; - } - else - { - yaffs_Object *newdir = NULL; - yaffs_Object *link = NULL; - - char *newname; - - newdir = yaffsfs_FindDirectory(NULL,newpath,&newname,0); + else if (lnk_dir->my_dev != obj->my_dev) + yaffsfs_SetError(-EXDEV); + else { + retVal = yaffsfs_CheckNameLength(newname); - if(!newdir) - { - yaffsfs_SetError(-ENOTDIR); - retVal = -1; - } - else if(newdir->myDev != obj->myDev) - { - yaffsfs_SetError(-EXDEV); - retVal = -1; - } - if(newdir && strlen(newname) > 0) - { - link = yaffs_Link(newdir,newname,obj); - if(link) + if (retVal == 0) { + lnk = yaffs_link_obj(lnk_dir, newname, obj); + if (lnk) retVal = 0; - else - { + else { yaffsfs_SetError(-ENOSPC); retVal = -1; } - } } yaffsfs_Unlock(); @@ -1477,34 +3135,84 @@ int yaffs_link(const char *oldpath, const char *newpath) return retVal; } -int yaffs_mknod(const char *pathname, mode_t mode, dev_t dev); +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 + */ -int yaffs_DumpDevStruct(const char *path) +/* + * yaffs_n_handles() + * Returns number of handles attached to the object + */ +int yaffs_n_handles(const YCHAR *path) { - char *rest; + struct yaffs_obj *obj; + + if (!path) { + yaffsfs_SetError(-EFAULT); + return -1; + } - yaffs_Object *obj = yaffsfs_FindRoot(path,&rest); + if (yaffsfs_CheckPath(path) < 0) { + yaffsfs_SetError(-ENAMETOOLONG); + return -1; + } - if(obj) - { - yaffs_Device *dev = obj->myDev; + 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" - "nPageWrites.......... %d\n" - "nPageReads........... %d\n" - "nBlockErasures....... %d\n" - "nGCCopies............ %d\n" - "garbageCollections... %d\n" - "passiveGarbageColl'ns %d\n" - "\n", - dev->nPageWrites, - dev->nPageReads, - dev->nBlockErasures, - dev->nGCCopies, - dev->garbageCollections, - dev->passiveGarbageCollections - ); + "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; } |