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428e60e079
The iterator of list_for_each() is never NULL. Identified with coccinelle. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
3209 lines
65 KiB
C
3209 lines
65 KiB
C
/*
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* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
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*
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* Copyright (C) 2002-2011 Aleph One Ltd.
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* for Toby Churchill Ltd and Brightstar Engineering
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*
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* Created by Charles Manning <charles@aleph1.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <div64.h>
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#include "yaffsfs.h"
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#include "yaffs_guts.h"
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#include "yaffscfg.h"
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#include "yportenv.h"
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#include "yaffs_trace.h"
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#define YAFFSFS_MAX_SYMLINK_DEREFERENCES 5
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#ifndef NULL
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#define NULL ((void *)0)
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#endif
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/* YAFFSFS_RW_SIZE must be a power of 2 */
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#define YAFFSFS_RW_SHIFT (13)
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#define YAFFSFS_RW_SIZE (1<<YAFFSFS_RW_SHIFT)
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/* Some forward references */
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static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relativeDirectory,
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const YCHAR *path,
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int symDepth, int getEquiv,
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struct yaffs_obj **dirOut,
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int *notDir, int *loop);
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static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj);
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unsigned int yaffs_wr_attempts;
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/*
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* Handle management.
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* There are open inodes in struct yaffsfs_Inode.
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* There are open file descriptors in yaffsfs_FileDes.
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* There are open handles in yaffsfs_FileDes.
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*
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* Things are structured this way to be like the Linux VFS model
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* so that interactions with the yaffs guts calls are similar.
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* That means more common code paths and less special code.
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* That means better testing etc.
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*
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* We have 3 layers because:
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* A handle is different than an fd because you can use dup()
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* to create a new handle that accesses the *same* fd. The two
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* handles will use the same offset (part of the fd). We only close
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* down the fd when there are no more handles accessing it.
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*
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* More than one fd can currently access one file, but each fd
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* has its own permsiions and offset.
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*/
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struct yaffsfs_Inode {
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int count; /* Number of handles accessing this inode */
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struct yaffs_obj *iObj;
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};
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struct yaffsfs_FileDes {
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u8 reading:1;
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u8 writing:1;
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u8 append:1;
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u8 shareRead:1;
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u8 shareWrite:1;
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int inodeId:12; /* Index to corresponding yaffsfs_Inode */
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int handleCount:10; /* Number of handles for this fd */
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loff_t position; /* current position in file */
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};
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struct yaffsfs_Handle {
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short int fdId;
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short int useCount;
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};
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struct yaffsfs_DirSearchContxt {
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struct yaffs_dirent de; /* directory entry */
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YCHAR name[NAME_MAX + 1]; /* name of directory being searched */
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struct yaffs_obj *dirObj; /* ptr to directory being searched */
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struct yaffs_obj *nextReturn; /* obj returned by next readddir */
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struct list_head others;
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int offset:20;
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unsigned inUse:1;
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};
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static struct yaffsfs_DirSearchContxt yaffsfs_dsc[YAFFSFS_N_DSC];
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static struct yaffsfs_Inode yaffsfs_inode[YAFFSFS_N_HANDLES];
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static struct yaffsfs_FileDes yaffsfs_fd[YAFFSFS_N_HANDLES];
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static struct yaffsfs_Handle yaffsfs_handle[YAFFSFS_N_HANDLES];
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static int yaffsfs_handlesInitialised;
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unsigned yaffs_set_trace(unsigned tm)
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{
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yaffs_trace_mask = tm;
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return yaffs_trace_mask;
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}
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unsigned yaffs_get_trace(void)
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{
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return yaffs_trace_mask;
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}
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/*
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* yaffsfs_InitHandle
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* Inilitalise handle management on start-up.
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*/
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static void yaffsfs_InitHandles(void)
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{
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int i;
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if (yaffsfs_handlesInitialised)
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return;
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memset(yaffsfs_inode, 0, sizeof(yaffsfs_inode));
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memset(yaffsfs_fd, 0, sizeof(yaffsfs_fd));
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memset(yaffsfs_handle, 0, sizeof(yaffsfs_handle));
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memset(yaffsfs_dsc, 0, sizeof(yaffsfs_dsc));
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for (i = 0; i < YAFFSFS_N_HANDLES; i++)
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yaffsfs_fd[i].inodeId = -1;
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for (i = 0; i < YAFFSFS_N_HANDLES; i++)
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yaffsfs_handle[i].fdId = -1;
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}
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static struct yaffsfs_Handle *yaffsfs_HandleToPointer(int h)
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{
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if (h >= 0 && h < YAFFSFS_N_HANDLES)
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return &yaffsfs_handle[h];
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return NULL;
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}
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static struct yaffsfs_FileDes *yaffsfs_HandleToFileDes(int handle)
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{
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struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle);
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if (h && h->useCount > 0 && h->fdId >= 0 && h->fdId < YAFFSFS_N_HANDLES)
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return &yaffsfs_fd[h->fdId];
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return NULL;
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}
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static struct yaffsfs_Inode *yaffsfs_HandleToInode(int handle)
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{
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struct yaffsfs_FileDes *fd = yaffsfs_HandleToFileDes(handle);
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if (fd && fd->handleCount > 0 &&
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fd->inodeId >= 0 && fd->inodeId < YAFFSFS_N_HANDLES)
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return &yaffsfs_inode[fd->inodeId];
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return NULL;
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}
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static struct yaffs_obj *yaffsfs_HandleToObject(int handle)
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{
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struct yaffsfs_Inode *in = yaffsfs_HandleToInode(handle);
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if (in)
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return in->iObj;
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return NULL;
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}
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/*
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* yaffsfs_FindInodeIdForObject
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* Find the inode entry for an object, if it exists.
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*/
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static int yaffsfs_FindInodeIdForObject(struct yaffs_obj *obj)
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{
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int i;
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int ret = -1;
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if (obj)
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obj = yaffs_get_equivalent_obj(obj);
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/* Look for it in open inode table */
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for (i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++) {
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if (yaffsfs_inode[i].iObj == obj)
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ret = i;
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}
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return ret;
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}
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/*
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* yaffsfs_GetInodeIdForObject
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* Grab an inode entry when opening a new inode.
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*/
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static int yaffsfs_GetInodeIdForObject(struct yaffs_obj *obj)
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{
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int i;
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int ret;
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struct yaffsfs_Inode *in = NULL;
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if (obj)
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obj = yaffs_get_equivalent_obj(obj);
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ret = yaffsfs_FindInodeIdForObject(obj);
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for (i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++) {
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if (!yaffsfs_inode[i].iObj)
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ret = i;
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}
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if (ret >= 0) {
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in = &yaffsfs_inode[ret];
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if (!in->iObj)
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in->count = 0;
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in->iObj = obj;
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in->count++;
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}
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return ret;
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}
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static int yaffsfs_CountHandles(struct yaffs_obj *obj)
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{
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int i = yaffsfs_FindInodeIdForObject(obj);
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if (i >= 0)
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return yaffsfs_inode[i].count;
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else
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return 0;
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}
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static void yaffsfs_ReleaseInode(struct yaffsfs_Inode *in)
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{
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struct yaffs_obj *obj;
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obj = in->iObj;
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if (obj->unlinked)
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yaffs_del_obj(obj);
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obj->my_inode = NULL;
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in->iObj = NULL;
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}
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static void yaffsfs_PutInode(int inodeId)
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{
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if (inodeId >= 0 && inodeId < YAFFSFS_N_HANDLES) {
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struct yaffsfs_Inode *in = &yaffsfs_inode[inodeId];
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in->count--;
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if (in->count <= 0) {
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yaffsfs_ReleaseInode(in);
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in->count = 0;
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}
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}
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}
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static int yaffsfs_NewHandle(struct yaffsfs_Handle **hptr)
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{
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int i;
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struct yaffsfs_Handle *h;
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for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
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h = &yaffsfs_handle[i];
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if (h->useCount < 1) {
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memset(h, 0, sizeof(struct yaffsfs_Handle));
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h->fdId = -1;
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h->useCount = 1;
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if (hptr)
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*hptr = h;
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return i;
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}
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}
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return -1;
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}
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static int yaffsfs_NewHandleAndFileDes(void)
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{
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int i;
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struct yaffsfs_FileDes *fd;
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struct yaffsfs_Handle *h = NULL;
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int handle = yaffsfs_NewHandle(&h);
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if (handle < 0)
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return -1;
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for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
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fd = &yaffsfs_fd[i];
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if (fd->handleCount < 1) {
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memset(fd, 0, sizeof(struct yaffsfs_FileDes));
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fd->inodeId = -1;
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fd->handleCount = 1;
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h->fdId = i;
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return handle;
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}
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}
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/* Dump the handle because we could not get a fd */
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h->useCount = 0;
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return -1;
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}
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/*
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* yaffs_get_handle
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* Increase use of handle when reading/writing a file
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* Also gets the file descriptor.
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*/
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static int yaffsfs_GetHandle(int handle)
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{
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struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle);
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if (h && h->useCount > 0) {
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h->useCount++;
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return 0;
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}
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return -1;
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}
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/*
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* yaffs_put_handle
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* Let go of a handle when closing a file or aborting an open or
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* ending a read or write.
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*/
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static int yaffsfs_PutFileDes(int fdId)
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{
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struct yaffsfs_FileDes *fd;
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if (fdId >= 0 && fdId < YAFFSFS_N_HANDLES) {
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fd = &yaffsfs_fd[fdId];
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fd->handleCount--;
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if (fd->handleCount < 1) {
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if (fd->inodeId >= 0) {
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yaffsfs_PutInode(fd->inodeId);
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fd->inodeId = -1;
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}
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}
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}
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return 0;
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}
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static int yaffsfs_PutHandle(int handle)
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{
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struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle);
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if (h && h->useCount > 0) {
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h->useCount--;
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if (h->useCount < 1) {
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yaffsfs_PutFileDes(h->fdId);
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h->fdId = -1;
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}
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}
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return 0;
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}
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static void yaffsfs_BreakDeviceHandles(struct yaffs_dev *dev)
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{
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struct yaffsfs_FileDes *fd;
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struct yaffsfs_Handle *h;
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struct yaffs_obj *obj;
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int i;
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for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
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h = yaffsfs_HandleToPointer(i);
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fd = yaffsfs_HandleToFileDes(i);
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obj = yaffsfs_HandleToObject(i);
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if (h && h->useCount > 0) {
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h->useCount = 0;
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h->fdId = 0;
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}
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if (fd && fd->handleCount > 0 && obj && obj->my_dev == dev) {
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fd->handleCount = 0;
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yaffsfs_PutInode(fd->inodeId);
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fd->inodeId = -1;
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}
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}
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}
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/*
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* Stuff to handle names.
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*/
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#ifdef CONFIG_YAFFS_CASE_INSENSITIVE
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static int yaffs_toupper(YCHAR a)
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{
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if (a >= 'a' && a <= 'z')
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return (a - 'a') + 'A';
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else
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return a;
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}
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int yaffsfs_Match(YCHAR a, YCHAR b)
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{
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return (yaffs_toupper(a) == yaffs_toupper(b));
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}
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#else
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int yaffsfs_Match(YCHAR a, YCHAR b)
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{
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/* case sensitive */
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return (a == b);
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}
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#endif
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int yaffsfs_IsPathDivider(YCHAR ch)
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{
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const YCHAR *str = YAFFS_PATH_DIVIDERS;
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while (*str) {
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if (*str == ch)
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return 1;
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str++;
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}
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return 0;
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}
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int yaffsfs_CheckNameLength(const char *name)
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{
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int retVal = 0;
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int nameLength = yaffs_strnlen(name, YAFFS_MAX_NAME_LENGTH + 1);
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if (nameLength == 0) {
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yaffsfs_SetError(-ENOENT);
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retVal = -1;
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} else if (nameLength > YAFFS_MAX_NAME_LENGTH) {
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yaffsfs_SetError(-ENAMETOOLONG);
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retVal = -1;
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}
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return retVal;
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}
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static int yaffsfs_alt_dir_path(const YCHAR *path, YCHAR **ret_path)
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{
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YCHAR *alt_path = NULL;
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int path_length;
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int i;
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/*
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* We don't have a definition for max path length.
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* We will use 3 * max name length instead.
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*/
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*ret_path = NULL;
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path_length = yaffs_strnlen(path, (YAFFS_MAX_NAME_LENGTH + 1) * 3 + 1);
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/* If the last character is a path divider, then we need to
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* trim it back so that the name look-up works properly.
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* eg. /foo/new_dir/ -> /foo/newdir
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* Curveball: Need to handle multiple path dividers:
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* eg. /foof/sdfse///// -> /foo/sdfse
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*/
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if (path_length > 0 && yaffsfs_IsPathDivider(path[path_length - 1])) {
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alt_path = kmalloc(path_length + 1, 0);
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if (!alt_path)
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return -1;
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yaffs_strcpy(alt_path, path);
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for (i = path_length - 1;
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i >= 0 && yaffsfs_IsPathDivider(alt_path[i]); i--)
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alt_path[i] = (YCHAR) 0;
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}
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*ret_path = alt_path;
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return 0;
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}
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LIST_HEAD(yaffsfs_deviceList);
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/*
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* yaffsfs_FindDevice
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* yaffsfs_FindRoot
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* Scan the configuration list to find the device
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* Curveballs: Should match paths that end in '/' too
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* Curveball2 Might have "/x/ and "/x/y". Need to return the longest match
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*/
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static struct yaffs_dev *yaffsfs_FindDevice(const YCHAR *path,
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YCHAR **restOfPath)
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{
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struct list_head *cfg;
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const YCHAR *leftOver;
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const YCHAR *p;
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struct yaffs_dev *retval = NULL;
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struct yaffs_dev *dev = NULL;
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int thisMatchLength;
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int longestMatch = -1;
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int matching;
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/*
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* Check all configs, choose the one that:
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* 1) Actually matches a prefix (ie /a amd /abc will not match
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* 2) Matches the longest.
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*/
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list_for_each(cfg, &yaffsfs_deviceList) {
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dev = list_entry(cfg, struct yaffs_dev, dev_list);
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leftOver = path;
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p = dev->param.name;
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thisMatchLength = 0;
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matching = 1;
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while (matching && *p && *leftOver) {
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/* Skip over any /s */
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while (yaffsfs_IsPathDivider(*p))
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p++;
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/* Skip over any /s */
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while (yaffsfs_IsPathDivider(*leftOver))
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leftOver++;
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/* Now match the text part */
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while (matching &&
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*p && !yaffsfs_IsPathDivider(*p) &&
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*leftOver && !yaffsfs_IsPathDivider(*leftOver)) {
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if (yaffsfs_Match(*p, *leftOver)) {
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p++;
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leftOver++;
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thisMatchLength++;
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} else {
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matching = 0;
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}
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}
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}
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/* Skip over any /s in leftOver */
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while (yaffsfs_IsPathDivider(*leftOver))
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leftOver++;
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/*Skip over any /s in p */
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while (yaffsfs_IsPathDivider(*p))
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p++;
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/* p should now be at the end of the string if fully matched */
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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) {
|
|
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 {
|
|
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)
|
|
{
|
|
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 0
|
|
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;
|
|
}
|