From: Yifan Zhao <zhaoyi...@sjtu.edu.cn>
The following new helpers are added to prepare for the upcoming
multi-threaded inter-file compression:
- erofs_mkfs_handle_{non,}directory;
- erofs_write_unencoded_file.
Signed-off-by: Yifan Zhao <zhaoyi...@sjtu.edu.cn>
Signed-off-by: Gao Xiang <hsiang...@linux.alibaba.com>
---
lib/inode.c | 106 +++++++++++++++++++++++++++++-----------------------
1 file changed, 60 insertions(+), 46 deletions(-)
diff --git a/lib/inode.c b/lib/inode.c
index ba0419f..f419f3c 100644
--- a/lib/inode.c
+++ b/lib/inode.c
@@ -477,12 +477,8 @@ static int write_uncompressed_file_from_fd(struct
erofs_inode *inode, int fd)
return 0;
}
-int erofs_write_file(struct erofs_inode *inode, int fd, u64 fpos)
+int erofs_write_unencoded_file(struct erofs_inode *inode, int fd, u64 fpos)
{
- int ret;
-
- DBG_BUGON(!inode->i_size);
-
if (cfg.c_chunkbits) {
inode->u.chunkbits = cfg.c_chunkbits;
/* chunk indexes when explicitly specified */
@@ -492,7 +488,17 @@ int erofs_write_file(struct erofs_inode *inode, int fd,
u64 fpos)
return erofs_blob_write_chunked_file(inode, fd, fpos);
}
+ /* fallback to all data uncompressed */
+ return write_uncompressed_file_from_fd(inode, fd);
+}
+
+int erofs_write_file(struct erofs_inode *inode, int fd, u64 fpos)
+{
+ DBG_BUGON(!inode->i_size);
+
if (cfg.c_compr_opts[0].alg && erofs_file_is_compressible(inode)) {
+ int ret;
+
ret = erofs_write_compressed_file(inode, fd, fpos);
if (!ret || ret != -ENOSPC)
return ret;
@@ -500,9 +506,8 @@ int erofs_write_file(struct erofs_inode *inode, int fd, u64
fpos)
if (lseek(fd, fpos, SEEK_SET) < 0)
return -errno;
}
-
/* fallback to all data uncompressed */
- return write_uncompressed_file_from_fd(inode, fd);
+ return erofs_write_unencoded_file(inode, fd, fpos);
}
static int erofs_bh_flush_write_inode(struct erofs_buffer_head *bh)
@@ -1095,52 +1100,44 @@ static void erofs_fixup_meta_blkaddr(struct erofs_inode
*rootdir)
rootdir->nid = (off - meta_offset) >> EROFS_ISLOTBITS;
}
-static int erofs_mkfs_build_tree(struct erofs_inode *dir, struct list_head
*dirs)
+static int erofs_mkfs_handle_nondirectory(struct erofs_inode *inode)
{
- int ret;
- DIR *_dir;
- struct dirent *dp;
- struct erofs_dentry *d;
- unsigned int nr_subdirs, i_nlink;
+ int ret = 0;
- ret = erofs_scan_file_xattrs(dir);
- if (ret < 0)
- return ret;
+ if (S_ISLNK(inode->i_mode)) {
+ char *const symlink = malloc(inode->i_size);
- ret = erofs_prepare_xattr_ibody(dir);
- if (ret < 0)
- return ret;
-
- if (!S_ISDIR(dir->i_mode)) {
- if (S_ISLNK(dir->i_mode)) {
- char *const symlink = malloc(dir->i_size);
-
- if (!symlink)
- return -ENOMEM;
- ret = readlink(dir->i_srcpath, symlink, dir->i_size);
- if (ret < 0) {
- free(symlink);
- return -errno;
- }
- ret = erofs_write_file_from_buffer(dir, symlink);
+ if (!symlink)
+ return -ENOMEM;
+ ret = readlink(inode->i_srcpath, symlink, inode->i_size);
+ if (ret < 0) {
free(symlink);
- } else if (dir->i_size) {
- int fd = open(dir->i_srcpath, O_RDONLY | O_BINARY);
- if (fd < 0)
- return -errno;
-
- ret = erofs_write_file(dir, fd, 0);
- close(fd);
- } else {
- ret = 0;
+ return -errno;
}
- if (ret)
- return ret;
+ ret = erofs_write_file_from_buffer(inode, symlink);
+ free(symlink);
+ } else if (inode->i_size) {
+ int fd = open(inode->i_srcpath, O_RDONLY | O_BINARY);
- erofs_prepare_inode_buffer(dir);
- erofs_write_tail_end(dir);
- return 0;
+ if (fd < 0)
+ return -errno;
+ ret = erofs_write_file(inode, fd, 0);
+ close(fd);
}
+ if (ret)
+ return ret;
+ erofs_prepare_inode_buffer(inode);
+ erofs_write_tail_end(inode);
+ return 0;
+}
+
+static int erofs_mkfs_handle_directory(struct erofs_inode *dir, struct
list_head *dirs)
+{
+ DIR *_dir;
+ struct dirent *dp;
+ struct erofs_dentry *d;
+ unsigned int nr_subdirs, i_nlink;
+ int ret;
_dir = opendir(dir->i_srcpath);
if (!_dir) {
@@ -1252,6 +1249,23 @@ err_closedir:
return ret;
}
+static int erofs_mkfs_build_tree(struct erofs_inode *inode, struct list_head
*dirs)
+{
+ int ret;
+
+ ret = erofs_scan_file_xattrs(inode);
+ if (ret < 0)
+ return ret;
+
+ ret = erofs_prepare_xattr_ibody(inode);
+ if (ret < 0)
+ return ret;
+
+ if (!S_ISDIR(inode->i_mode))
+ return erofs_mkfs_handle_nondirectory(inode);
+ return erofs_mkfs_handle_directory(inode, dirs);
+}
+
struct erofs_inode *erofs_mkfs_build_tree_from_path(const char *path)
{
LIST_HEAD(dirs);
--
2.39.3
