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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-09-25 13:21:07 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-09-25 13:32:42 +0200
commite0e98b7b747f63c1b8fccd035592e3684fdb2691 (patch)
tree31e75a68d40f6947cf09e06928df8f4f013d5a89 /lib/sqfs
parentf64986ac1d95ffb2604cfef0efa8e7d2e0b7f8ce (diff)
Add the ability to hook into the data writer block writing
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'lib/sqfs')
-rw-r--r--lib/sqfs/data_writer/block.c39
-rw-r--r--lib/sqfs/data_writer/common.c7
-rw-r--r--lib/sqfs/data_writer/fragment.c21
-rw-r--r--lib/sqfs/data_writer/internal.h3
4 files changed, 53 insertions, 17 deletions
diff --git a/lib/sqfs/data_writer/block.c b/lib/sqfs/data_writer/block.c
index 9461737..9c40793 100644
--- a/lib/sqfs/data_writer/block.c
+++ b/lib/sqfs/data_writer/block.c
@@ -61,11 +61,15 @@ static int allign_file(sqfs_data_writer_t *proc, sqfs_block_t *blk)
int process_completed_block(sqfs_data_writer_t *proc, sqfs_block_t *blk)
{
+ uint64_t offset, bytes;
size_t start, count;
- uint64_t offset;
uint32_t out;
int err;
+ if (proc->hooks != NULL && proc->hooks->pre_block_write != NULL) {
+ proc->hooks->pre_block_write(proc->user_ptr, blk, proc->file);
+ }
+
if (blk->flags & SQFS_BLK_FIRST_BLOCK) {
proc->start = proc->file->get_size(proc->file);
proc->file_start = proc->num_blocks;
@@ -101,6 +105,10 @@ int process_completed_block(sqfs_data_writer_t *proc, sqfs_block_t *blk)
return err;
}
+ if (proc->hooks != NULL && proc->hooks->post_block_write != NULL) {
+ proc->hooks->post_block_write(proc->user_ptr, blk, proc->file);
+ }
+
if (blk->flags & SQFS_BLK_LAST_BLOCK) {
err = allign_file(proc, blk);
if (err)
@@ -112,19 +120,28 @@ int process_completed_block(sqfs_data_writer_t *proc, sqfs_block_t *blk)
sqfs_inode_set_file_block_start(blk->inode, offset);
- if (start < proc->file_start) {
- offset = start + count;
+ if (start >= proc->file_start)
+ return 0;
+
+ offset = start + count;
+ if (offset >= proc->file_start) {
+ count = proc->num_blocks - offset;
+ proc->num_blocks = offset;
+ } else {
+ proc->num_blocks = proc->file_start;
+ }
- if (offset >= proc->file_start) {
- proc->num_blocks = offset;
- } else {
- proc->num_blocks = proc->file_start;
- }
+ if (proc->hooks != NULL &&
+ proc->hooks->notify_blocks_erased != NULL) {
+ bytes = proc->file->get_size(proc->file) - proc->start;
- err = proc->file->truncate(proc->file, proc->start);
- if (err)
- return err;
+ proc->hooks->notify_blocks_erased(proc->user_ptr,
+ count, bytes);
}
+
+ err = proc->file->truncate(proc->file, proc->start);
+ if (err)
+ return err;
}
return 0;
diff --git a/lib/sqfs/data_writer/common.c b/lib/sqfs/data_writer/common.c
index 51acc1e..c9d5589 100644
--- a/lib/sqfs/data_writer/common.c
+++ b/lib/sqfs/data_writer/common.c
@@ -155,3 +155,10 @@ int sqfs_data_writer_write_fragment_table(sqfs_data_writer_t *proc,
super->fragment_table_start = start;
return 0;
}
+
+void sqfs_data_writer_set_hooks(sqfs_data_writer_t *proc, void *user_ptr,
+ const sqfs_block_hooks_t *hooks)
+{
+ proc->hooks = hooks;
+ proc->user_ptr = user_ptr;
+}
diff --git a/lib/sqfs/data_writer/fragment.c b/lib/sqfs/data_writer/fragment.c
index e4fe9b4..9f169b7 100644
--- a/lib/sqfs/data_writer/fragment.c
+++ b/lib/sqfs/data_writer/fragment.c
@@ -64,6 +64,10 @@ static int store_fragment(sqfs_data_writer_t *proc, sqfs_block_t *frag,
sqfs_inode_set_frag_location(frag->inode, proc->frag_block->index,
proc->frag_block->size);
+ if (proc->hooks != NULL && proc->hooks->pre_fragment_store != NULL) {
+ proc->hooks->pre_fragment_store(proc->user_ptr, frag);
+ }
+
memcpy(proc->frag_block->data + proc->frag_block->size,
frag->data, frag->size);
@@ -82,12 +86,8 @@ int process_completed_fragment(sqfs_data_writer_t *proc, sqfs_block_t *frag,
hash = MK_BLK_HASH(frag->checksum, frag->size);
for (i = 0; i < proc->frag_list_num; ++i) {
- if (proc->frag_list[i].hash == hash) {
- sqfs_inode_set_frag_location(frag->inode,
- proc->frag_list[i].index,
- proc->frag_list[i].offset);
- return 0;
- }
+ if (proc->frag_list[i].hash == hash)
+ goto out_duplicate;
}
if (proc->frag_block != NULL) {
@@ -125,4 +125,13 @@ fail:
free(*blk_out);
*blk_out = NULL;
return err;
+out_duplicate:
+ sqfs_inode_set_frag_location(frag->inode, proc->frag_list[i].index,
+ proc->frag_list[i].offset);
+
+ if (proc->hooks != NULL &&
+ proc->hooks->notify_fragment_discard != NULL) {
+ proc->hooks->notify_fragment_discard(proc->user_ptr, frag);
+ }
+ return 0;
}
diff --git a/lib/sqfs/data_writer/internal.h b/lib/sqfs/data_writer/internal.h
index 69de9ac..53ddc5f 100644
--- a/lib/sqfs/data_writer/internal.h
+++ b/lib/sqfs/data_writer/internal.h
@@ -98,6 +98,9 @@ struct sqfs_data_writer_t {
size_t frag_list_num;
size_t frag_list_max;
+ const sqfs_block_hooks_t *hooks;
+ void *user_ptr;
+
/* used only by workers */
size_t max_block_size;