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blobfs: fix the problem that the return code is not returned correctly

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In spdk_file_read and spdk_file_write, __send_rw_from_file always returns 0 and does not return the correct error code,
because req has been released in __rw_from_file_done.

Signed-off-by: JimboLuCN <lujinbo@didiglobal.com>
Change-Id: I4437cf8f1817dbb98bf71b808ad1c544e7b09853
Signed-off-by: JimboLuCN <lujinbo@didiglobal.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/4311
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
This commit is contained in:
JimboLuCN 2020-09-18 18:35:46 +08:00 committed by Tomasz Zawadzki
parent ed0c3125fb
commit 944a480ea7
1 changed files with 32 additions and 12 deletions
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44
lib/blobfs/blobfs.c
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@ -183,6 +183,7 @@ struct spdk_fs_cb_args {
struct spdk_filesystem *fs;
struct spdk_file *file;
int rc;
int *rwerrno;
struct iovec *iovs;
uint32_t iovcnt;
struct iovec iov;
@ -607,6 +608,9 @@ __wake_caller(void *arg, int fserrno)
{
struct spdk_fs_cb_args *args = arg;
if ((args->rwerrno != NULL) && (*(args->rwerrno) == 0) && fserrno) {
*(args->rwerrno) = fserrno;
}
args->rc = fserrno;
sem_post(args->sem);
}
@ -2435,27 +2439,33 @@ __rw_from_file(void *ctx)
}
}
struct rw_from_file_arg {
struct spdk_fs_channel *channel;
int rwerrno;
};
static int
__send_rw_from_file(struct spdk_file *file, void *payload,
uint64_t offset, uint64_t length, bool is_read,
struct spdk_fs_channel *channel)
struct rw_from_file_arg *arg)
{
struct spdk_fs_request *req;
struct spdk_fs_cb_args *args;
req = alloc_fs_request_with_iov(channel, 1);
req = alloc_fs_request_with_iov(arg->channel, 1);
if (req == NULL) {
sem_post(&channel->sem);
sem_post(&arg->channel->sem);
return -ENOMEM;
}
args = &req->args;
args->file = file;
args->sem = &channel->sem;
args->sem = &arg->channel->sem;
args->iovs[0].iov_base = payload;
args->iovs[0].iov_len = (size_t)length;
args->op.rw.offset = offset;
args->op.rw.is_read = is_read;
args->rwerrno = &arg->rwerrno;
file->fs->send_request(__rw_from_file, req);
return 0;
}
@ -2490,14 +2500,20 @@ spdk_file_write(struct spdk_file *file, struct spdk_fs_thread_ctx *ctx,
}
if (file->last == NULL) {
struct rw_from_file_arg arg = {};
int rc;
arg.channel = channel;
arg.rwerrno = 0;
file->append_pos += length;
pthread_spin_unlock(&file->lock);
rc = __send_rw_from_file(file, payload, offset, length, false, channel);
sem_wait(&channel->sem);
rc = __send_rw_from_file(file, payload, offset, length, false, &arg);
if (rc != 0) {
return rc;
}
sem_wait(&channel->sem);
return arg.rwerrno;
}
blob_size = __file_get_blob_size(file);
@ -2658,7 +2674,7 @@ spdk_file_read(struct spdk_file *file, struct spdk_fs_thread_ctx *ctx,
uint32_t sub_reads = 0;
struct cache_buffer *buf;
uint64_t read_len;
int rc = 0;
struct rw_from_file_arg arg = {};
pthread_spin_lock(&file->lock);
@ -2685,9 +2701,12 @@ spdk_file_read(struct spdk_file *file, struct spdk_fs_thread_ctx *ctx,
check_readahead(file, offset + CACHE_BUFFER_SIZE, channel);
}
arg.channel = channel;
arg.rwerrno = 0;
final_length = 0;
final_offset = offset + length;
while (offset < final_offset) {
int ret = 0;
length = NEXT_CACHE_BUFFER_OFFSET(offset) - offset;
if (length > (final_offset - offset)) {
length = final_offset - offset;
@ -2696,9 +2715,9 @@ spdk_file_read(struct spdk_file *file, struct spdk_fs_thread_ctx *ctx,
buf = tree_find_filled_buffer(file->tree, offset);
if (buf == NULL) {
pthread_spin_unlock(&file->lock);
rc = __send_rw_from_file(file, payload, offset, length, true, channel);
ret = __send_rw_from_file(file, payload, offset, length, true, &arg);
pthread_spin_lock(&file->lock);
if (rc == 0) {
if (ret == 0) {
sub_reads++;
}
} else {
@ -2716,9 +2735,10 @@ spdk_file_read(struct spdk_file *file, struct spdk_fs_thread_ctx *ctx,
}
}
if (rc == 0) {
if (ret == 0) {
final_length += length;
} else {
arg.rwerrno = ret;
break;
}
payload += length;
@ -2729,10 +2749,10 @@ spdk_file_read(struct spdk_file *file, struct spdk_fs_thread_ctx *ctx,
sem_wait(&channel->sem);
sub_reads--;
}
if (rc == 0) {
if (arg.rwerrno == 0) {
return final_length;
} else {
return rc;
return arg.rwerrno;
}
}