diff options
Diffstat (limited to 'source4/ntvfs/posix/pvfs_aio.c')
| -rw-r--r-- | source4/ntvfs/posix/pvfs_aio.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/source4/ntvfs/posix/pvfs_aio.c b/source4/ntvfs/posix/pvfs_aio.c new file mode 100644 index 0000000000..2a10b03fda --- /dev/null +++ b/source4/ntvfs/posix/pvfs_aio.c @@ -0,0 +1,166 @@ +/* + Unix SMB/CIFS implementation. + + POSIX NTVFS backend - Linux AIO calls + + Copyright (C) Andrew Tridgell 2006 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "includes.h" +#include "vfs_posix.h" +#include "lib/events/events.h" +#include "system/aio.h" + +struct pvfs_aio_read_state { + struct ntvfs_request *req; + union smb_read *rd; + struct pvfs_file *f; + struct aio_event *ae; +}; + +struct pvfs_aio_write_state { + struct ntvfs_request *req; + union smb_write *wr; + struct pvfs_file *f; + struct aio_event *ae; +}; + +/* + called when an aio read has finished +*/ +static void pvfs_aio_read_handler(struct event_context *ev, struct aio_event *ae, + int ret, void *private) +{ + struct pvfs_aio_read_state *state = talloc_get_type(private, + struct pvfs_aio_read_state); + struct pvfs_file *f = state->f; + union smb_read *rd = state->rd; + + if (ret < 0) { + /* errno is -ret on error */ + state->req->async_states->status = pvfs_map_errno(f->pvfs, -ret); + state->req->async_states->send_fn(state->req); + return; + } + + f->handle->position = f->handle->seek_offset = rd->readx.in.offset + ret; + + rd->readx.out.nread = ret; + rd->readx.out.remaining = 0xFFFF; + rd->readx.out.compaction_mode = 0; + + talloc_steal(ev, state->ae); + + state->req->async_states->status = NT_STATUS_OK; + state->req->async_states->send_fn(state->req); +} + + +/* + read from a file +*/ +NTSTATUS pvfs_aio_pread(struct ntvfs_request *req, union smb_read *rd, + struct pvfs_file *f, uint32_t maxcnt) +{ + struct iocb iocb; + struct pvfs_aio_read_state *state; + + state = talloc(req, struct pvfs_aio_read_state); + NT_STATUS_HAVE_NO_MEMORY(state); + + io_prep_pread(&iocb, f->handle->fd, rd->readx.out.data, + maxcnt, rd->readx.in.offset); + state->ae = event_add_aio(req->ctx->event_ctx, req->ctx->event_ctx, &iocb, + pvfs_aio_read_handler, state); + if (state->ae == NULL) { + DEBUG(0,("Failed event_add_aio\n")); + talloc_free(state); + return NT_STATUS_NOT_IMPLEMENTED; + } + + state->req = req; + state->rd = rd; + state->f = f; + + req->async_states->state |= NTVFS_ASYNC_STATE_ASYNC; + + return NT_STATUS_OK; +} + + + + +/* + called when an aio write has finished +*/ +static void pvfs_aio_write_handler(struct event_context *ev, struct aio_event *ae, + int ret, void *private) +{ + struct pvfs_aio_write_state *state = talloc_get_type(private, + struct pvfs_aio_write_state); + struct pvfs_file *f = state->f; + union smb_write *wr = state->wr; + + if (ret < 0) { + /* errno is -ret on error */ + state->req->async_states->status = pvfs_map_errno(f->pvfs, -ret); + state->req->async_states->send_fn(state->req); + return; + } + + f->handle->seek_offset = wr->writex.in.offset + ret; + + wr->writex.out.nwritten = ret; + wr->writex.out.remaining = 0; + + talloc_steal(ev, state->ae); + + state->req->async_states->status = NT_STATUS_OK; + state->req->async_states->send_fn(state->req); +} + + +/* + write to a file +*/ +NTSTATUS pvfs_aio_pwrite(struct ntvfs_request *req, union smb_write *wr, + struct pvfs_file *f) +{ + struct iocb iocb; + struct pvfs_aio_write_state *state; + + state = talloc(req, struct pvfs_aio_write_state); + NT_STATUS_HAVE_NO_MEMORY(state); + + io_prep_pwrite(&iocb, f->handle->fd, wr->writex.in.data, + wr->writex.in.count, wr->writex.in.offset); + state->ae = event_add_aio(req->ctx->event_ctx, req->ctx->event_ctx, &iocb, + pvfs_aio_write_handler, state); + if (state->ae == NULL) { + DEBUG(0,("Failed event_add_aio\n")); + talloc_free(state); + return NT_STATUS_NOT_IMPLEMENTED; + } + + state->req = req; + state->wr = wr; + state->f = f; + + req->async_states->state |= NTVFS_ASYNC_STATE_ASYNC; + + return NT_STATUS_OK; +} + |