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Revert "[dfs][romfs]支持相对地址模式 (#5768)" (#5786)

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This reverts commit e68f934ff8.
This commit is contained in:
Bernard Xiong
2022-04-08 20:03:43 +08:00
committed by GitHub
parent e1ef28a79b
commit 1aab3607af
3 changed files with 32 additions and 58 deletions
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components/dfs/filesystems/romfs/dfs_romfs.c
+29 -49
View File
@@ -16,37 +16,19 @@
int dfs_romfs_mount(struct dfs_filesystem *fs, unsigned long rwflag, const void *data)
{
struct root_data *root_data;
struct romfs_dirent *root_dirent;
if (data == NULL)
return -EIO;
root_data = (struct root_data *)rt_malloc(sizeof(struct root_data));
if (root_data)
{
long long size = sizeof(struct romfs_dirent);
root_data->dirent = (struct romfs_dirent *)data;
if ((const char *)root_data->dirent->data - root_data->dirent->name != 0x04)
root_data->offset = 0;
else
root_data->offset = (long long)root_data->dirent->name != size ? ((long long)data - (long long)root_data->dirent->name + size) : (long long)data;
fs->data = root_data;
}
else
{
return -RT_ENOMEM;
}
root_dirent = (struct romfs_dirent *)data;
fs->data = root_dirent;
return RT_EOK;
}
int dfs_romfs_unmount(struct dfs_filesystem *fs)
{
if (fs->data)
{
rt_free(fs->data);
}
return RT_EOK;
}
@@ -63,7 +45,7 @@ rt_inline int check_dirent(struct romfs_dirent *dirent)
return 0;
}
struct romfs_dirent *dfs_romfs_lookup(struct root_data *root_data, const char *path, rt_size_t *size)
struct romfs_dirent *dfs_romfs_lookup(struct romfs_dirent *root_dirent, const char *path, rt_size_t *size)
{
rt_size_t index, found;
const char *subpath, *subpath_end;
@@ -71,18 +53,18 @@ struct romfs_dirent *dfs_romfs_lookup(struct root_data *root_data, const char *p
rt_size_t dirent_size;
/* Check the root_dirent. */
if (check_dirent(root_data->dirent) != 0)
if (check_dirent(root_dirent) != 0)
return NULL;
if (path[0] == '/' && path[1] == '\0')
{
*size = root_data->dirent->size;
return root_data->dirent;
*size = root_dirent->size;
return root_dirent;
}
/* goto root directy entries */
dirent = (struct romfs_dirent *)(root_data->dirent->data + root_data->offset);
dirent_size = root_data->dirent->size;
/* goto root directory entries */
dirent = (struct romfs_dirent *)root_dirent->data;
dirent_size = root_dirent->size;
/* get the end position of this subpath */
subpath_end = path;
@@ -102,8 +84,8 @@ struct romfs_dirent *dfs_romfs_lookup(struct root_data *root_data, const char *p
{
if (check_dirent(&dirent[index]) != 0)
return NULL;
if (rt_strlen(dirent[index].name + root_data->offset) == (subpath_end - subpath) &&
rt_strncmp(dirent[index].name + root_data->offset, subpath, (subpath_end - subpath)) == 0)
if (rt_strlen(dirent[index].name) == (subpath_end - subpath) &&
rt_strncmp(dirent[index].name, subpath, (subpath_end - subpath)) == 0)
{
dirent_size = dirent[index].size;
@@ -123,7 +105,7 @@ struct romfs_dirent *dfs_romfs_lookup(struct root_data *root_data, const char *p
if (dirent[index].type == ROMFS_DIRENT_DIR)
{
/* enter directory */
dirent = (struct romfs_dirent *)(dirent[index].data + root_data->offset);
dirent = (struct romfs_dirent *)dirent[index].data;
found = 1;
break;
}
@@ -150,9 +132,7 @@ int dfs_romfs_read(struct dfs_fd *file, void *buf, size_t count)
{
rt_size_t length;
struct romfs_dirent *dirent;
struct root_data *root_data;
root_data = (struct root_data *)file->fs->data;
dirent = (struct romfs_dirent *)file->data;
RT_ASSERT(dirent != NULL);
@@ -167,7 +147,7 @@ int dfs_romfs_read(struct dfs_fd *file, void *buf, size_t count)
length = file->size - file->pos;
if (length > 0)
memcpy(buf, &(dirent->data[file->pos]) + root_data->offset, length);
rt_memcpy(buf, &(dirent->data[file->pos]), length);
/* update file current position */
file->pos += length;
@@ -177,7 +157,7 @@ int dfs_romfs_read(struct dfs_fd *file, void *buf, size_t count)
int dfs_romfs_lseek(struct dfs_fd *file, off_t offset)
{
if (offset <= (off_t)file->size)
if (offset <= file->size)
{
file->pos = offset;
return file->pos;
@@ -196,17 +176,19 @@ int dfs_romfs_open(struct dfs_fd *file)
{
rt_size_t size;
struct romfs_dirent *dirent;
struct root_data *root_data;
struct romfs_dirent *root_dirent;
struct dfs_filesystem *fs;
root_data = (struct root_data *)file->fs->data;
fs = (struct dfs_filesystem *)file->data;
root_dirent = (struct romfs_dirent *)fs->data;
if (check_dirent(root_data->dirent) != 0)
if (check_dirent(root_dirent) != 0)
return -EIO;
if (file->flags & (O_CREAT | O_WRONLY | O_APPEND | O_TRUNC | O_RDWR))
return -EINVAL;
dirent = dfs_romfs_lookup(root_data, file->path, &size);
dirent = dfs_romfs_lookup(root_dirent, file->path, &size);
if (dirent == NULL)
return -ENOENT;
@@ -234,10 +216,10 @@ int dfs_romfs_stat(struct dfs_filesystem *fs, const char *path, struct stat *st)
{
rt_size_t size;
struct romfs_dirent *dirent;
struct root_data *root_data;
struct romfs_dirent *root_dirent;
root_data = (struct root_data *)fs->data;
dirent = dfs_romfs_lookup(root_data, path, &size);
root_dirent = (struct romfs_dirent *)fs->data;
dirent = dfs_romfs_lookup(root_dirent, path, &size);
if (dirent == NULL)
return -ENOENT;
@@ -260,20 +242,18 @@ int dfs_romfs_stat(struct dfs_filesystem *fs, const char *path, struct stat *st)
int dfs_romfs_getdents(struct dfs_fd *file, struct dirent *dirp, uint32_t count)
{
uint32_t index;
rt_size_t index;
const char *name;
struct dirent *d;
struct romfs_dirent *dirent, *sub_dirent;
struct root_data *root_data;
root_data = (struct root_data *)file->fs->data;
dirent = (struct romfs_dirent *)file->data;
if (check_dirent(dirent) != 0)
return -EIO;
RT_ASSERT(dirent->type == ROMFS_DIRENT_DIR);
/* enter directory */
dirent = (struct romfs_dirent *)(dirent->data + root_data->offset);
dirent = (struct romfs_dirent *)dirent->data;
/* make integer count */
count = (count / sizeof(struct dirent));
@@ -281,12 +261,12 @@ int dfs_romfs_getdents(struct dfs_fd *file, struct dirent *dirp, uint32_t count)
return -EINVAL;
index = 0;
for (index = 0; index < count && (size_t)file->pos < file->size; index ++)
for (index = 0; index < count && file->pos < file->size; index ++)
{
d = dirp + index;
sub_dirent = &dirent[file->pos];
name = sub_dirent->name + root_data->offset;
name = sub_dirent->name;
/* fill dirent */
if (sub_dirent->type == ROMFS_DIRENT_DIR)
@@ -296,7 +276,7 @@ int dfs_romfs_getdents(struct dfs_fd *file, struct dirent *dirp, uint32_t count)
d->d_namlen = rt_strlen(name);
d->d_reclen = (rt_uint16_t)sizeof(struct dirent);
rt_strncpy(d->d_name, name, rt_strlen(name) + 1);
rt_strncpy(d->d_name, name, DFS_PATH_MAX);
/* move to next position */
++ file->pos;
components/dfs/filesystems/romfs/dfs_romfs.h
-6
View File
@@ -25,12 +25,6 @@ struct romfs_dirent
rt_size_t size; /* file size */
};
struct root_data
{
struct romfs_dirent *dirent; /* root dirent */
long long offset;
};
int dfs_romfs_init(void);
extern const struct romfs_dirent romfs_root;