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blobfs: add iov data structure to request

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For existing filesystem APIs, SPDK can only support
1 data buffer, we add the iovec data structure here
so that it can support multiple buffer vectors in
following patches.

Change-Id: I26984f3ea985f349a5016060e0801e3989ce2fc6
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/450722
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
This commit is contained in:
Changpeng Liu 2019-04-09 04:50:41 -04:00 committed by Ben Walker
parent 65d9e4594a
commit ceb6ef8958
1 changed files with 43 additions and 16 deletions
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59
lib/blobfs/blobfs.c
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@ -134,6 +134,9 @@ struct spdk_fs_cb_args {
struct spdk_filesystem *fs;
struct spdk_file *file;
int rc;
struct iovec *iovs;
uint32_t iovcnt;
struct iovec iov;
union {
struct {
TAILQ_HEAD(, spdk_deleted_file) deleted_files;
@ -143,7 +146,6 @@ struct spdk_fs_cb_args {
} truncate;
struct {
struct spdk_io_channel *channel;
void *user_buf;
void *pin_buf;
int is_read;
off_t offset;
@ -260,9 +262,17 @@ struct spdk_fs_thread_ctx {
};
static struct spdk_fs_request *
alloc_fs_request(struct spdk_fs_channel *channel)
alloc_fs_request_with_iov(struct spdk_fs_channel *channel, uint32_t iovcnt)
{
struct spdk_fs_request *req;
struct iovec *iovs = NULL;
if (iovcnt > 1) {
iovs = calloc(iovcnt, sizeof(struct iovec));
if (!iovs) {
return NULL;
}
}
if (channel->sync) {
pthread_spin_lock(&channel->lock);
@ -279,19 +289,36 @@ alloc_fs_request(struct spdk_fs_channel *channel)
if (req == NULL) {
SPDK_ERRLOG("Cannot allocate req on spdk_fs_channel =%p\n", channel);
free(iovs);
return NULL;
}
memset(req, 0, sizeof(*req));
req->channel = channel;
if (iovcnt > 1) {
req->args.iovs = iovs;
} else {
req->args.iovs = &req->args.iov;
}
req->args.iovcnt = iovcnt;
return req;
}
static struct spdk_fs_request *
alloc_fs_request(struct spdk_fs_channel *channel)
{
return alloc_fs_request_with_iov(channel, 0);
}
static void
free_fs_request(struct spdk_fs_request *req)
{
struct spdk_fs_channel *channel = req->channel;
if (req->args.iovcnt > 1) {
free(req->args.iovs);
}
if (channel->sync) {
pthread_spin_lock(&channel->lock);
}
@ -1596,14 +1623,14 @@ __read_done(void *ctx, int bserrno)
assert(req != NULL);
if (args->op.rw.is_read) {
memcpy(args->op.rw.user_buf,
memcpy(args->iovs[0].iov_base,
args->op.rw.pin_buf + (args->op.rw.offset & (args->op.rw.blocklen - 1)),
args->op.rw.length);
args->iovs[0].iov_len);
__rw_done(req, 0);
} else {
memcpy(args->op.rw.pin_buf + (args->op.rw.offset & (args->op.rw.blocklen - 1)),
args->op.rw.user_buf,
args->op.rw.length);
args->iovs[0].iov_base,
args->iovs[0].iov_len);
spdk_blob_io_write(args->file->blob, args->op.rw.channel,
args->op.rw.pin_buf,
args->op.rw.start_lba, args->op.rw.num_lba,
@ -1655,7 +1682,7 @@ __readwrite(struct spdk_file *file, struct spdk_io_channel *_channel,
return;
}
req = alloc_fs_request(channel);
req = alloc_fs_request_with_iov(channel, 1);
if (req == NULL) {
cb_fn(cb_arg, -ENOMEM);
return;
@ -1668,10 +1695,10 @@ __readwrite(struct spdk_file *file, struct spdk_io_channel *_channel,
args->arg = cb_arg;
args->file = file;
args->op.rw.channel = channel->bs_channel;
args->op.rw.user_buf = payload;
args->iovs[0].iov_base = payload;
args->iovs[0].iov_len = (size_t)length;
args->op.rw.is_read = is_read;
args->op.rw.offset = offset;
args->op.rw.length = length;
args->op.rw.blocklen = lba_size;
pin_buf_length = num_lba * lba_size;
@ -2092,12 +2119,12 @@ __rw_from_file(void *ctx)
struct spdk_file *file = args->file;
if (args->op.rw.is_read) {
spdk_file_read_async(file, file->fs->sync_target.sync_io_channel, args->op.rw.user_buf,
args->op.rw.offset, args->op.rw.length,
spdk_file_read_async(file, file->fs->sync_target.sync_io_channel, args->iovs[0].iov_base,
args->op.rw.offset, (uint64_t)args->iovs[0].iov_len,
__rw_from_file_done, req);
} else {
spdk_file_write_async(file, file->fs->sync_target.sync_io_channel, args->op.rw.user_buf,
args->op.rw.offset, args->op.rw.length,
spdk_file_write_async(file, file->fs->sync_target.sync_io_channel, args->iovs[0].iov_base,
args->op.rw.offset, (uint64_t)args->iovs[0].iov_len,
__rw_from_file_done, req);
}
}
@ -2110,7 +2137,7 @@ __send_rw_from_file(struct spdk_file *file, void *payload,
struct spdk_fs_request *req;
struct spdk_fs_cb_args *args;
req = alloc_fs_request(channel);
req = alloc_fs_request_with_iov(channel, 1);
if (req == NULL) {
sem_post(&channel->sem);
return -ENOMEM;
@ -2119,9 +2146,9 @@ __send_rw_from_file(struct spdk_file *file, void *payload,
args = &req->args;
args->file = file;
args->sem = &channel->sem;
args->op.rw.user_buf = payload;
args->iovs[0].iov_base = payload;
args->iovs[0].iov_len = (size_t)length;
args->op.rw.offset = offset;
args->op.rw.length = length;
args->op.rw.is_read = is_read;
file->fs->send_request(__rw_from_file, req);
return 0;