char *server;
char *export;
struct nfs_fh3 rootfh;
+ size_t readmax;
+ size_t writemax;
};
struct nfs_cb_data;
int continue_int;
struct nfs_fh3 fh;
+
+ /* for multi-read/write calls. */
+ int error;
+ int cancel;
+ int num_calls;
+ off_t start_offset, max_offset;
+ char *buffer;
+};
+
+struct nfs_mcb_data {
+ struct nfs_cb_data *data;
+ off_t offset;
+ size_t count;
};
static int nfs_lookup_path_async_internal(struct nfs_context *nfs, struct nfs_cb_data *data, struct nfs_fh3 *fh);
data->fh.data.data_val = NULL;
}
+ if (data->buffer != NULL) {
+ free(data->buffer);
+ data->buffer = NULL;
+ }
+
free(data);
}
-static void nfs_mount_9_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+static void nfs_mount_10_cb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
{
struct nfs_cb_data *data = private_data;
struct nfs_context *nfs = data->nfs;
free_nfs_cb_data(data);
}
-static void nfs_mount_8_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
+static void nfs_mount_9_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
{
struct nfs_cb_data *data = private_data;
struct nfs_context *nfs = data->nfs;
+ FSINFO3res *res = command_data;
if (status == RPC_STATUS_ERROR) {
data->cb(-EFAULT, nfs, command_data, data->private_data);
return;
}
+ nfs->readmax = res->FSINFO3res_u.resok.rtmax;
+ nfs->writemax = res->FSINFO3res_u.resok.wtmax;
+
+ if (rpc_nfs_getattr_async(rpc, nfs_mount_10_cb, &nfs->rootfh, data) != 0) {
+ data->cb(-ENOMEM, nfs, command_data, data->private_data);
+ free_nfs_cb_data(data);
+ return;
+ }
+}
+
+static void nfs_mount_8_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
+{
+ struct nfs_cb_data *data = private_data;
+ struct nfs_context *nfs = data->nfs;
+
+ if (status == RPC_STATUS_ERROR) {
+ data->cb(-EFAULT, nfs, command_data, data->private_data);
+ free_nfs_cb_data(data);
+ return;
+ }
+ if (status == RPC_STATUS_CANCEL) {
+ data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
+ free_nfs_cb_data(data);
+ return;
+ }
- if (rpc_nfs_getattr_async(rpc, nfs_mount_9_cb, &nfs->rootfh, data) != 0) {
+ if (rpc_nfs_fsinfo_async(rpc, nfs_mount_9_cb, &nfs->rootfh, data) != 0) {
data->cb(-ENOMEM, nfs, command_data, data->private_data);
free_nfs_cb_data(data);
return;
}
}
+
static void nfs_mount_7_cb(struct rpc_context *rpc, int status, void *command_data, void *private_data)
{
struct nfs_cb_data *data = private_data;
if (data == NULL) {
rpc_set_error(nfs->rpc, "out of memory: failed to allocate nfs_cb_data structure");
printf("failed to allocate memory for nfs cb data\n");
- free_nfs_cb_data(data);
return -2;
}
bzero(data, sizeof(struct nfs_cb_data));
free_nfs_cb_data(data);
}
+static void nfs_pread_mcb(struct rpc_context *rpc _U_, int status, void *command_data, void *private_data)
+{
+ struct nfs_mcb_data *mdata = private_data;
+ struct nfs_cb_data *data = mdata->data;
+ struct nfs_context *nfs = data->nfs;
+ READ3res *res;
+
+ data->num_calls--;
+
+ if (status == RPC_STATUS_ERROR) {
+ /* flag the failure but do not invoke callback until we have received all responses */
+ data->error = 1;
+ }
+ if (status == RPC_STATUS_CANCEL) {
+ /* flag the cancellation but do not invoke callback until we have received all responses */
+ data->cancel = 1;
+ }
+
+ /* reassemble the data into the buffer */
+ if (status == RPC_STATUS_SUCCESS) {
+ res = command_data;
+ if (res->status != NFS3_OK) {
+ rpc_set_error(nfs->rpc, "NFS: Read failed with %s(%d)", nfsstat3_to_str(res->status), nfsstat3_to_errno(res->status));
+ data->error = 1;
+ } else {
+ memcpy(&data->buffer[mdata->offset], res->READ3res_u.resok.data.data_val, res->READ3res_u.resok.count);
+ if (data->max_offset < mdata->offset + res->READ3res_u.resok.count) {
+ data->max_offset = mdata->offset + res->READ3res_u.resok.count;
+ }
+ }
+ }
+
+ if (data->num_calls > 0) {
+ /* still waiting for more replies */
+ free(mdata);
+ return;
+ }
+
+
+ if (data->error != 0) {
+ data->cb(-EFAULT, nfs, command_data, data->private_data);
+ free_nfs_cb_data(data);
+ free(mdata);
+ return;
+ }
+ if (data->cancel != 0) {
+ data->cb(-EINTR, nfs, "Command was cancelled", data->private_data);
+ free_nfs_cb_data(data);
+ free(mdata);
+ return;
+ }
+
+ data->nfsfh->offset = data->max_offset;
+ data->cb(data->max_offset - data->start_offset, nfs, data->buffer, data->private_data);
+ free_nfs_cb_data(data);
+ free(mdata);
+}
+
int nfs_pread_async(struct nfs_context *nfs, struct nfsfh *nfsfh, off_t offset, size_t count, nfs_cb cb, void *private_data)
{
struct nfs_cb_data *data;
if (data == NULL) {
rpc_set_error(nfs->rpc, "out of memory: failed to allocate nfs_cb_data structure");
printf("failed to allocate memory for nfs cb data\n");
- free_nfs_cb_data(data);
return -1;
}
bzero(data, sizeof(struct nfs_cb_data));
data->nfsfh = nfsfh;
nfsfh->offset = offset;
- if (rpc_nfs_read_async(nfs->rpc, nfs_pread_cb, &nfsfh->fh, offset, count, data) != 0) {
- rpc_set_error(nfs->rpc, "RPC error: Failed to send READ call for %s", data->path);
+
+ if (count <= nfs_get_readmax(nfs)) {
+ if (rpc_nfs_read_async(nfs->rpc, nfs_pread_cb, &nfsfh->fh, offset, count, data) != 0) {
+ rpc_set_error(nfs->rpc, "RPC error: Failed to send READ call for %s", data->path);
+ data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
+ free_nfs_cb_data(data);
+ return -1;
+ }
+ return 0;
+ }
+
+ /* trying to read more than maximum server read size, we has to chop it up into smaller
+ * reads and collect into a reassembly buffer.
+ * we send all reads in parallell so that performance is still good.
+ */
+ data->start_offset = offset;
+
+ data->buffer = malloc(count);
+ if (data->buffer == NULL) {
+ rpc_set_error(nfs->rpc, "Out-Of-Memory: Failed to allocate reassembly buffer for %d bytes", (int)count);
data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
free_nfs_cb_data(data);
return -1;
}
- return 0;
+
+ while (count > 0) {
+ size_t readcount = count;
+ struct nfs_mcb_data *mdata;
+
+ if (readcount > nfs_get_readmax(nfs)) {
+ readcount = nfs_get_readmax(nfs);
+ }
+
+ mdata = malloc(sizeof(struct nfs_mcb_data));
+ if (mdata == NULL) {
+ rpc_set_error(nfs->rpc, "out of memory: failed to allocate nfs_mcb_data structure");
+ printf("failed to allocate memory for nfs mcb data\n");
+ return -1;
+ }
+ bzero(mdata, sizeof(struct nfs_mcb_data));
+ mdata->data = data;
+ mdata->offset = offset;
+ mdata->count = readcount;
+
+ if (rpc_nfs_read_async(nfs->rpc, nfs_pread_mcb, &nfsfh->fh, offset, readcount, mdata) != 0) {
+ rpc_set_error(nfs->rpc, "RPC error: Failed to send READ call for %s", data->path);
+ data->cb(-ENOMEM, nfs, rpc_get_error(nfs->rpc), data->private_data);
+ free(mdata);
+ return -1;
+ }
+
+ count -= readcount;
+ offset += readcount;
+ data->num_calls++;
+ }
+
+ return 0;
}
/*
if (data == NULL) {
rpc_set_error(nfs->rpc, "out of memory: failed to allocate nfs_cb_data structure");
printf("failed to allocate memory for nfs cb data\n");
- free_nfs_cb_data(data);
return -1;
}
bzero(data, sizeof(struct nfs_cb_data));
if (data == NULL) {
rpc_set_error(nfs->rpc, "out of memory: failed to allocate nfs_cb_data structure");
printf("failed to allocate memory for nfs cb data\n");
- free_nfs_cb_data(data);
return -1;
}
bzero(data, sizeof(struct nfs_cb_data));
if (data == NULL) {
rpc_set_error(nfs->rpc, "out of memory: failed to allocate nfs_cb_data structure");
printf("failed to allocate memory for nfs cb data\n");
- free_nfs_cb_data(data);
return -1;
}
bzero(data, sizeof(struct nfs_cb_data));
if (data == NULL) {
rpc_set_error(nfs->rpc, "out of memory: failed to allocate nfs_cb_data structure");
printf("failed to allocate memory for nfs cb data\n");
- free_nfs_cb_data(data);
return -1;
}
bzero(data, sizeof(struct nfs_cb_data));
return nfsfh->offset;
}
+
+
+/*
+ * Get the maximum supported READ3 size by the server
+ */
+size_t nfs_get_readmax(struct nfs_context *nfs)
+{
+ return nfs->readmax;
+}
+
+/*
+ * Get the maximum supported WRITE3 size by the server
+ */
+size_t nfs_get_writemax(struct nfs_context *nfs)
+{
+ return nfs->writemax;
+}
repositories / deb_libnfs.git / blobdiff