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fs/squashfs: Add init and clean-up functions to decompression

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Add sqfs_decompressor_init() and sqfs_decompressor_cleanup(). These
functions are called respectively in sqfs_probe() and sqfs_close(). For
now, only ZSTD requires an initialization logic. ZSTD support will be
added in a follow-up commit.

Move squashfs_ctxt definition to sqfs_filesystem.h. This structure is
passed to sqfs_decompressor_init() and sqfs_decompressor_cleanup(), so
it can no longer be local to sqfs.c.

Signed-off-by: Joao Marcos Costa <joaomarcos.costa@bootlin.com>
This commit is contained in:
Joao Marcos Costa
2020-08-18 17:17:21 +02:00
committed by Tom Rini
parent 4a1f0b80ad
commit 10f7cf5f12
4 changed files with 51 additions and 10 deletions
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15
fs/squashfs/sqfs.c
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@@ -23,12 +23,6 @@
#include "sqfs_filesystem.h"
#include "sqfs_utils.h"
struct squashfs_ctxt {
struct disk_partition cur_part_info;
struct blk_desc *cur_dev;
struct squashfs_super_block *sblk;
};
static struct squashfs_ctxt ctxt;
static int sqfs_disk_read(__u32 block, __u32 nr_blocks, void *buf)
@@ -1023,6 +1017,14 @@ int sqfs_probe(struct blk_desc *fs_dev_desc, struct disk_partition *fs_partition
ctxt.sblk = sblk;
ret = sqfs_decompressor_init(&ctxt);
if (ret) {
ctxt.cur_dev = NULL;
free(ctxt.sblk);
return -EINVAL;
}
return 0;
}
@@ -1525,6 +1527,7 @@ void sqfs_close(void)
{
free(ctxt.sblk);
ctxt.cur_dev = NULL;
sqfs_decompressor_cleanup(&ctxt);
}
void sqfs_closedir(struct fs_dir_stream *dirs)