Merge branch 'driver-refactoring' into new-driver-refactoring

[yaffs2.git] / direct / yaffsfs.c

diff --git a/direct/yaffsfs.c b/direct/yaffsfs.c
index 61aee74710a92146a35d3b9d911e1adbfafb1c3c..7ee486a8d0d95cb2afa2dcd2eb69dd368db441de 100644 (file)
--- a/direct/yaffsfs.c
+++ b/direct/yaffsfs.c
@@ -74,7 +74,7 @@ struct yaffsfs_FileDes {
        u8 shareWrite:1;
        int inodeId:12;         /* Index to corresponding yaffsfs_Inode */
        int handleCount:10;     /* Number of handles for this fd */
-       loff_t position;        /* current position in file */
+       Y_LOFF_T position;      /* current position in file */
 };
 
 struct yaffsfs_Handle {
@@ -501,6 +501,9 @@ static struct yaffs_dev *yaffsfs_FindDevice(const YCHAR *path,
                thisMatchLength = 0;
                matching = 1;
 
+               if(!p)
+                       continue;
+
                while (matching && *p && *leftOver) {
                        /* Skip over any /s */
                        while (yaffsfs_IsPathDivider(*p))
@@ -793,7 +796,7 @@ int yaffs_open_sharing(const YCHAR *path, int oflag, int mode, int sharing)
        int notDir = 0;
        int loop = 0;
 
-       if (!path) {
+       if (yaffsfs_CheckMemRegion(path, 0, 0)< 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -1064,20 +1067,20 @@ int yaffs_close(int handle)
 }
 
 static int yaffsfs_do_read(int handle, void *vbuf, unsigned int nbyte,
-                   int isPread, loff_t offset)
+                   int isPread, Y_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;
+       Y_LOFF_T pos = 0;
+       Y_LOFF_T startPos = 0;
+       Y_LOFF_T endPos = 0;
        int nRead = 0;
        int nToRead = 0;
        int totalRead = 0;
-       loff_t maxRead;
+       Y_LOFF_T maxRead;
        u8 *buf = (u8 *) vbuf;
 
-       if (!vbuf) {
+       if (yaffsfs_CheckMemRegion(vbuf, nbyte, 1) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -1180,26 +1183,26 @@ 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)
+int yaffs_pread(int handle, void *buf, unsigned int nbyte, Y_LOFF_T offset)
 {
        return yaffsfs_do_read(handle, buf, nbyte, 1, offset);
 }
 
 static int yaffsfs_do_write(int handle, const void *vbuf, unsigned int nbyte,
-                    int isPwrite, loff_t offset)
+                    int isPwrite, Y_LOFF_T offset)
 {
        struct yaffsfs_FileDes *fd = NULL;
        struct yaffs_obj *obj = NULL;
-       loff_t pos = 0;
-       loff_t startPos = 0;
-       loff_t endPos;
+       Y_LOFF_T pos = 0;
+       Y_LOFF_T startPos = 0;
+       Y_LOFF_T endPos;
        int nWritten = 0;
        int totalWritten = 0;
        int write_trhrough = 0;
        int nToWrite = 0;
        const u8 *buf = (const u8 *)vbuf;
 
-       if (!vbuf) {
+       if (yaffsfs_CheckMemRegion(vbuf, nbyte, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -1297,12 +1300,12 @@ 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)
+int yaffs_pwrite(int fd, const void *buf, unsigned int nbyte, Y_LOFF_T offset)
 {
        return yaffsfs_do_write(fd, buf, nbyte, 1, offset);
 }
 
-int yaffs_truncate(const YCHAR *path, loff_t new_size)
+int yaffs_truncate(const YCHAR *path, Y_LOFF_T new_size)
 {
        struct yaffs_obj *obj = NULL;
        struct yaffs_obj *dir = NULL;
@@ -1310,7 +1313,7 @@ int yaffs_truncate(const YCHAR *path, loff_t new_size)
        int notDir = 0;
        int loop = 0;
 
-       if (!path) {
+       if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -1347,7 +1350,7 @@ int yaffs_truncate(const YCHAR *path, loff_t new_size)
        return (result) ? 0 : -1;
 }
 
-int yaffs_ftruncate(int handle, loff_t new_size)
+int yaffs_ftruncate(int handle, Y_LOFF_T new_size)
 {
        struct yaffsfs_FileDes *fd = NULL;
        struct yaffs_obj *obj = NULL;
@@ -1375,12 +1378,12 @@ int yaffs_ftruncate(int handle, loff_t new_size)
 
 }
 
-loff_t yaffs_lseek(int handle, loff_t offset, int whence)
+Y_LOFF_T yaffs_lseek(int handle, Y_LOFF_T offset, int whence)
 {
        struct yaffsfs_FileDes *fd = NULL;
        struct yaffs_obj *obj = NULL;
-       loff_t pos = -1;
-       loff_t fSize = -1;
+       Y_LOFF_T pos = -1;
+       Y_LOFF_T fSize = -1;
 
        yaffsfs_Lock();
        fd = yaffsfs_HandleToFileDes(handle);
@@ -1425,7 +1428,7 @@ static int yaffsfs_DoUnlink(const YCHAR *path, int isDirectory)
        int notDir = 0;
        int loop = 0;
 
-       if (!path) {
+       if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -1494,7 +1497,8 @@ int yaffs_rename(const YCHAR *oldPath, const YCHAR *newPath)
 
        YCHAR *alt_newpath = NULL;
 
-       if (!oldPath || !newPath) {
+       if (yaffsfs_CheckMemRegion(oldPath, 0, 0) < 0 ||
+           yaffsfs_CheckMemRegion(newPath, 0, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -1633,7 +1637,8 @@ static int yaffsfs_DoStatOrLStat(const YCHAR *path,
        int notDir = 0;
        int loop = 0;
 
-       if (!path || !buf) {
+       if (yaffsfs_CheckMemRegion(path, 0, 0) < 0 ||
+           yaffsfs_CheckMemRegion(buf, sizeof(*buf), 1) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -1681,7 +1686,7 @@ int yaffs_fstat(int fd, struct yaffs_stat *buf)
 
        int retVal = -1;
 
-       if (!buf) {
+       if (yaffsfs_CheckMemRegion(buf, sizeof(*buf), 1) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -1802,7 +1807,9 @@ static int yaffs_do_setxattr(const YCHAR *path, const char *name,
 
        int retVal = -1;
 
-       if (!path || !name || !data) {
+       if (yaffsfs_CheckMemRegion(path, 0, 0) < 0 ||
+           yaffsfs_CheckMemRegion(name, 0, 0) < 0 ||
+           yaffsfs_CheckMemRegion(data, size, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -1858,7 +1865,8 @@ int yaffs_fsetxattr(int fd, const char *name,
 
        int retVal = -1;
 
-       if (!name || !data) {
+       if (yaffsfs_CheckMemRegion(name, 0, 0) < 0 ||
+           yaffsfs_CheckMemRegion(data, size, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -1890,7 +1898,9 @@ static int yaffs_do_getxattr(const YCHAR *path, const char *name,
        int notDir = 0;
        int loop = 0;
 
-       if (!path || !name || !data) {
+       if (yaffsfs_CheckMemRegion(path, 0, 0) < 0 ||
+           yaffsfs_CheckMemRegion(name, 0, 0) < 0 ||
+           yaffsfs_CheckMemRegion(data, size, 1) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -1942,7 +1952,8 @@ int yaffs_fgetxattr(int fd, const char *name, void *data, int size)
 
        int retVal = -1;
 
-       if (!name || !data) {
+       if (yaffsfs_CheckMemRegion(name, 0, 0) < 0 ||
+           yaffsfs_CheckMemRegion(data, size, 1) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -1974,7 +1985,8 @@ static int yaffs_do_listxattr(const YCHAR *path, char *data,
        int notDir = 0;
        int loop = 0;
 
-       if (!path || !data) {
+       if (yaffsfs_CheckMemRegion(path, 0, 0) < 0 ||
+           yaffsfs_CheckMemRegion(data, size, 1) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -2027,7 +2039,7 @@ int yaffs_flistxattr(int fd, char *data, int size)
 
        int retVal = -1;
 
-       if (!data) {
+       if (yaffsfs_CheckMemRegion(data, size, 1) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -2059,7 +2071,8 @@ static int yaffs_do_removexattr(const YCHAR *path, const char *name,
        int loop = 0;
        int retVal = -1;
 
-       if (!path || !name) {
+       if (yaffsfs_CheckMemRegion(path, 0, 0) < 0 ||
+           yaffsfs_CheckMemRegion(name, 0, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -2112,7 +2125,7 @@ int yaffs_fremovexattr(int fd, const char *name)
 
        int retVal = -1;
 
-       if (!name) {
+       if (yaffsfs_CheckMemRegion(name, 0, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -2236,7 +2249,7 @@ int yaffs_access(const YCHAR *path, int amode)
        int loop = 0;
        int retval = -1;
 
-       if (!path) {
+       if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -2294,7 +2307,7 @@ int yaffs_chmod(const YCHAR *path, mode_t mode)
        int notDir = 0;
        int loop = 0;
 
-       if (!path) {
+       if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -2366,7 +2379,7 @@ int yaffs_mkdir(const YCHAR *path, mode_t mode)
        int notDir = 0;
        int loop = 0;
 
-       if (!path) {
+       if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -2420,7 +2433,7 @@ int yaffs_rmdir(const YCHAR *path)
        int result;
        YCHAR *alt_path;
 
-       if (!path) {
+       if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -2457,7 +2470,7 @@ int yaffs_mount_common(const YCHAR *path, int read_only, int skip_checkpt)
        int result = YAFFS_FAIL;
        struct yaffs_dev *dev = NULL;
 
-       if (!path) {
+       if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -2516,7 +2529,7 @@ int yaffs_sync(const YCHAR *path)
        struct yaffs_dev *dev = NULL;
        YCHAR *dummy;
 
-       if (!path) {
+       if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -2565,7 +2578,7 @@ int yaffs_remount(const YCHAR *path, int force, int read_only)
        int retVal = -1;
        struct yaffs_dev *dev = NULL;
 
-       if (!path) {
+       if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -2605,7 +2618,7 @@ int yaffs_unmount2(const YCHAR *path, int force)
        int retVal = -1;
        struct yaffs_dev *dev = NULL;
 
-       if (!path) {
+       if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -2648,11 +2661,14 @@ int yaffs_unmount(const YCHAR *path)
        return yaffs_unmount2(path, 0);
 }
 
-loff_t yaffs_freespace(const YCHAR *path)
+int yaffs_format(const YCHAR *path,
+               int unmount_flag,
+               int force_unmount_flag,
+               int remount_flag)
 {
-       loff_t retVal = -1;
+       int retVal = 0;
        struct yaffs_dev *dev = NULL;
-       YCHAR *dummy;
+       int result;
 
        if (!path) {
                yaffsfs_SetError(-EFAULT);
@@ -2664,6 +2680,64 @@ loff_t yaffs_freespace(const YCHAR *path)
                return -1;
        }
 
+       yaffsfs_Lock();
+       dev = yaffsfs_FindMountPoint(path);
+
+       if (dev) {
+               int was_mounted = dev->is_mounted;
+
+               if (dev->is_mounted && unmount_flag) {
+                       int inUse;
+                       yaffs_flush_whole_cache(dev);
+                       yaffs_checkpoint_save(dev);
+                       inUse = yaffsfs_IsDevBusy(dev);
+                       if (!inUse || force_unmount_flag) {
+                               if (inUse)
+                                       yaffsfs_BreakDeviceHandles(dev);
+                               yaffs_deinitialise(dev);
+                       }
+               }
+
+               if(dev->is_mounted) {
+                               yaffsfs_SetError(-EBUSY);
+                               retVal = -1;
+               } else {
+                       yaffs_format_dev(dev);
+                       if(was_mounted && remount_flag) {
+                               result = yaffs_guts_initialise(dev);
+                               if (result == YAFFS_FAIL) {
+                                       yaffsfs_SetError(-ENOMEM);
+                                       retVal = -1;
+                               }
+                       }
+               }
+       } else {
+               yaffsfs_SetError(-ENODEV);
+               retVal = -1;
+       }
+
+       yaffsfs_Unlock();
+       return retVal;
+
+}
+
+
+Y_LOFF_T yaffs_freespace(const YCHAR *path)
+{
+       Y_LOFF_T retVal = -1;
+       struct yaffs_dev *dev = NULL;
+       YCHAR *dummy;
+
+       if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
+               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) {
@@ -2677,13 +2751,13 @@ loff_t yaffs_freespace(const YCHAR *path)
        return retVal;
 }
 
-loff_t yaffs_totalspace(const YCHAR *path)
+Y_LOFF_T yaffs_totalspace(const YCHAR *path)
 {
-       loff_t retVal = -1;
+       Y_LOFF_T retVal = -1;
        struct yaffs_dev *dev = NULL;
        YCHAR *dummy;
 
-       if (!path) {
+       if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -2710,11 +2784,11 @@ loff_t yaffs_totalspace(const YCHAR *path)
 
 int yaffs_inodecount(const YCHAR *path)
 {
-       loff_t retVal = -1;
+       Y_LOFF_T retVal = -1;
        struct yaffs_dev *dev = NULL;
        YCHAR *dummy;
 
-       if (!path) {
+       if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -2866,7 +2940,7 @@ yaffs_DIR *yaffs_opendir(const YCHAR *dirname)
        int notDir = 0;
        int loop = 0;
 
-       if (!dirname) {
+       if (yaffsfs_CheckMemRegion(dirname, 0, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return NULL;
        }
@@ -2960,6 +3034,9 @@ void yaffs_rewinddir(yaffs_DIR *dirp)
 
        dsc = (struct yaffsfs_DirSearchContxt *) dirp;
 
+       if (yaffsfs_CheckMemRegion(dirp, sizeof(*dsc), 0) < 0)
+               return;
+
        yaffsfs_Lock();
 
        yaffsfs_SetDirRewound(dsc);
@@ -2973,7 +3050,7 @@ int yaffs_closedir(yaffs_DIR *dirp)
 
        dsc = (struct yaffsfs_DirSearchContxt *) dirp;
 
-       if (!dsc) {
+       if (yaffsfs_CheckMemRegion(dirp, sizeof(*dsc), 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -2997,7 +3074,8 @@ int yaffs_symlink(const YCHAR *oldpath, const YCHAR *newpath)
        int notDir = 0;
        int loop = 0;
 
-       if (!oldpath || !newpath) {
+       if (yaffsfs_CheckMemRegion(oldpath, 0, 0) < 0 ||
+           yaffsfs_CheckMemRegion(newpath, 0, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -3044,7 +3122,8 @@ int yaffs_readlink(const YCHAR *path, YCHAR *buf, int bufsiz)
        int notDir = 0;
        int loop = 0;
 
-       if (!path || !buf) {
+       if (yaffsfs_CheckMemRegion(path, 0, 0) < 0 ||
+           yaffsfs_CheckMemRegion(buf, bufsiz, 1) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -3085,7 +3164,8 @@ int yaffs_link(const YCHAR *oldpath, const YCHAR *linkpath)
        int lnkLoop = 0;
        YCHAR *newname;
 
-       if (!oldpath || !linkpath) {
+       if (yaffsfs_CheckMemRegion(oldpath, 0, 0) < 0 ||
+           yaffsfs_CheckMemRegion(linkpath, 0, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }
@@ -3157,7 +3237,7 @@ int yaffs_n_handles(const YCHAR *path)
 {
        struct yaffs_obj *obj;
 
-       if (!path) {
+       if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
                yaffsfs_SetError(-EFAULT);
                return -1;
        }