diff options
Diffstat (limited to 'xlators/storage/bd/src/bd-aio.c')
| -rw-r--r-- | xlators/storage/bd/src/bd-aio.c | 527 |
1 files changed, 527 insertions, 0 deletions
diff --git a/xlators/storage/bd/src/bd-aio.c b/xlators/storage/bd/src/bd-aio.c new file mode 100644 index 000000000..62d4590f7 --- /dev/null +++ b/xlators/storage/bd/src/bd-aio.c @@ -0,0 +1,527 @@ +/* + Copyright IBM, Corp. 2013 + + This file is part of GlusterFS. + + Author: M. Mohan Kumar <mohan@in.ibm.com> + + Based on posix-aio.c + + This file is licensed to you under your choice of the GNU Lesser + General Public License, version 3 or any later version (LGPLv3 or + later), or the GNU General Public License, version 2 (GPLv2), in all + cases as published by the Free Software Foundation. +*/ + +#ifndef _CONFIG_H +#define _CONFIG_H +#include "config.h" +#endif + +#include <lvm2app.h> +#include <sys/uio.h> + +#include "xlator.h" +#include "glusterfs.h" +#include "defaults.h" +#include "bd.h" +#include "bd-aio.h" + +#ifdef HAVE_LIBAIO +#include <libaio.h> + +struct bd_aio_cb { + struct iocb iocb; + call_frame_t *frame; + struct iobuf *iobuf; + struct iobref *iobref; + struct iatt prebuf; + int op; + off_t offset; + fd_t *fd; +}; + +void +__bd_fd_set_odirect (fd_t *fd, bd_fd_t *bd_fd, int opflags, + off_t offset, size_t size) +{ + int odirect = 0; + int flags = 0; + int ret = 0; + + odirect = bd_fd->odirect; + + if ((fd->flags|opflags) & O_DIRECT) { + /* if instructed, use O_DIRECT always */ + odirect = 1; + } else { + /* else use O_DIRECT when feasible */ + if ((offset|size) & 0xfff) + odirect = 0; + else + odirect = 1; + } + + if (!odirect && bd_fd->odirect) { + flags = fcntl (bd_fd->fd, F_GETFL); + ret = fcntl (bd_fd->fd, F_SETFL, (flags & (~O_DIRECT))); + bd_fd->odirect = 0; + } + + if (odirect && !bd_fd->odirect) { + flags = fcntl (bd_fd->fd, F_GETFL); + ret = fcntl (bd_fd->fd, F_SETFL, (flags | O_DIRECT)); + bd_fd->odirect = 1; + } + + if (ret) { + gf_log (THIS->name, GF_LOG_WARNING, + "fcntl() failed (%s). fd=%d flags=%d pfd->odirect=%d", + strerror (errno), bd_fd->fd, flags, bd_fd->odirect); + } +} + +int +bd_aio_readv_complete (struct bd_aio_cb *paiocb, int res, int res2) +{ + call_frame_t *frame = NULL; + xlator_t *this = NULL; + struct iobuf *iobuf = NULL; + struct iatt postbuf = {0,}; + int op_ret = -1; + int op_errno = 0; + struct iovec iov; + struct iobref *iobref = NULL; + off_t offset = 0; + bd_attr_t *bdatt = NULL; + + frame = paiocb->frame; + this = frame->this; + iobuf = paiocb->iobuf; + offset = paiocb->offset; + + if (res < 0) { + op_ret = -1; + op_errno = -res; + gf_log (this->name, GF_LOG_ERROR, + "readv(async) failed fd=%p,size=%lu,offset=%llu (%d/%s)", + paiocb->fd, paiocb->iocb.u.c.nbytes, + (unsigned long long) paiocb->offset, + res, strerror (op_errno)); + goto out; + } + + bd_inode_ctx_get (paiocb->fd->inode, this, &bdatt); + memcpy (&postbuf, &bdatt->iatt, sizeof (struct iatt)); + + op_ret = res; + op_errno = 0; + + iobref = iobref_new (); + if (!iobref) { + op_ret = -1; + op_errno = ENOMEM; + goto out; + } + + iobref_add (iobref, iobuf); + + iov.iov_base = iobuf_ptr (iobuf); + iov.iov_len = op_ret; + + /* Hack to notify higher layers of EOF. */ + if (!postbuf.ia_size || (offset + iov.iov_len) >= postbuf.ia_size) + op_errno = ENOENT; + +out: + STACK_UNWIND_STRICT (readv, frame, op_ret, op_errno, &iov, 1, + &postbuf, iobref, NULL); + if (iobuf) + iobuf_unref (iobuf); + if (iobref) + iobref_unref (iobref); + + GF_FREE (paiocb); + + return 0; +} + +int +bd_aio_readv (call_frame_t *frame, xlator_t *this, fd_t *fd, + size_t size, off_t offset, uint32_t flags, dict_t *xdata) +{ + int32_t op_errno = EINVAL; + int _fd = -1; + struct iobuf *iobuf = NULL; + bd_fd_t *bd_fd = NULL; + int ret = -1; + struct bd_aio_cb *paiocb = NULL; + bd_priv_t *priv = NULL; + struct iocb *iocb = NULL; + bd_attr_t *bdatt = NULL; + + VALIDATE_OR_GOTO (frame, err); + VALIDATE_OR_GOTO (this, err); + VALIDATE_OR_GOTO (fd, err); + + priv = this->private; + + ret = bd_fd_ctx_get (this, fd, &bd_fd); + if (ret < 0 || !bd_fd) { + STACK_WIND (frame, default_readv_cbk, FIRST_CHILD (this), + FIRST_CHILD (this)->fops->readv, fd, size, offset, + flags, xdata); + return 0; + } + _fd = bd_fd->fd; + bd_inode_ctx_get (fd->inode, this, &bdatt); + if (!size) { + op_errno = EINVAL; + gf_log (this->name, GF_LOG_WARNING, "size=%"GF_PRI_SIZET, size); + goto err; + } + + iobuf = iobuf_get2 (this->ctx->iobuf_pool, size); + if (!iobuf) { + op_errno = ENOMEM; + goto err; + } + + paiocb = CALLOC (1, sizeof (*paiocb)); + if (!paiocb) { + op_errno = ENOMEM; + goto err; + } + + paiocb->frame = frame; + paiocb->iobuf = iobuf; + paiocb->offset = offset; + paiocb->op = GF_FOP_READ; + paiocb->fd = fd; + + paiocb->iocb.data = paiocb; + paiocb->iocb.aio_fildes = _fd; + paiocb->iocb.aio_lio_opcode = IO_CMD_PREAD; + paiocb->iocb.aio_reqprio = 0; + paiocb->iocb.u.c.buf = iobuf_ptr (iobuf); + paiocb->iocb.u.c.nbytes = size; + paiocb->iocb.u.c.offset = offset; + + iocb = &paiocb->iocb; + + LOCK (&fd->lock); + { + __bd_fd_set_odirect (fd, bd_fd, flags, offset, size); + + ret = io_submit (priv->ctxp, 1, &iocb); + } + UNLOCK (&fd->lock); + + if (ret != 1) { + gf_log (this->name, GF_LOG_ERROR, + "io_submit() returned %d", ret); + op_errno = -ret; + goto err; + } + + return 0; +err: + STACK_UNWIND_STRICT (readv, frame, -1, op_errno, 0, 0, 0, 0, 0); + if (iobuf) + iobuf_unref (iobuf); + + if (paiocb) + GF_FREE (paiocb); + + return 0; +} + +int +bd_aio_writev_complete (struct bd_aio_cb *paiocb, int res, int res2) +{ + call_frame_t *frame = NULL; + xlator_t *this = NULL; + struct iatt prebuf = {0,}; + struct iatt postbuf = {0,}; + int op_ret = -1; + int op_errno = 0; + bd_attr_t *bdatt = NULL; + + frame = paiocb->frame; + prebuf = paiocb->prebuf; + this = frame->this; + + if (res < 0) { + op_ret = -1; + op_errno = -res; + gf_log (this->name, GF_LOG_ERROR, + "writev(async) failed fd=%p,offset=%llu (%d/%s)", + paiocb->fd, (unsigned long long) paiocb->offset, res, + strerror (op_errno)); + + goto out; + } + + bd_inode_ctx_get (paiocb->fd->inode, this, &bdatt); + bd_update_amtime (&bdatt->iatt, GF_SET_ATTR_MTIME); + memcpy (&postbuf, &bdatt->iatt, sizeof (struct iatt)); + + op_ret = res; + op_errno = 0; + +out: + STACK_UNWIND_STRICT (writev, frame, op_ret, op_errno, &prebuf, &postbuf, + NULL); + + if (paiocb) { + if (paiocb->iobref) + iobref_unref (paiocb->iobref); + GF_FREE (paiocb); + } + + return 0; +} + +int +bd_aio_writev (call_frame_t *frame, xlator_t *this, fd_t *fd, + struct iovec *iov, int count, off_t offset, uint32_t flags, + struct iobref *iobref, dict_t *xdata) +{ + int32_t op_errno = EINVAL; + int _fd = -1; + bd_fd_t *bd_fd = NULL; + int ret = -1; + struct bd_aio_cb *paiocb = NULL; + bd_priv_t *priv = NULL; + struct iocb *iocb = NULL; + bd_attr_t *bdatt = NULL; + + VALIDATE_OR_GOTO (frame, err); + VALIDATE_OR_GOTO (this, err); + VALIDATE_OR_GOTO (fd, err); + + priv = this->private; + + ret = bd_fd_ctx_get (this, fd, &bd_fd); + if (ret < 0 || !bd_fd) { + STACK_WIND (frame, default_writev_cbk, + FIRST_CHILD(this), FIRST_CHILD(this)->fops->writev, + fd, iov, count, offset, flags, iobref, xdata); + return 0; + } + + bd_inode_ctx_get (fd->inode, this, &bdatt); + + _fd = bd_fd->fd; + + paiocb = CALLOC (1, sizeof (*paiocb)); + if (!paiocb) { + op_errno = ENOMEM; + goto err; + } + + + paiocb->frame = frame; + paiocb->offset = offset; + paiocb->op = GF_FOP_WRITE; + paiocb->fd = fd; + + paiocb->iocb.data = paiocb; + paiocb->iocb.aio_fildes = _fd; + paiocb->iobref = iobref_ref (iobref); + paiocb->iocb.aio_lio_opcode = IO_CMD_PWRITEV; + paiocb->iocb.aio_reqprio = 0; + paiocb->iocb.u.v.vec = iov; + paiocb->iocb.u.v.nr = count; + paiocb->iocb.u.v.offset = offset; + + iocb = &paiocb->iocb; + + memcpy (&paiocb->prebuf, &bdatt->iatt, sizeof (struct iatt)); + LOCK (&fd->lock); + { + __bd_fd_set_odirect (fd, bd_fd, flags, offset, + iov_length (iov, count)); + + ret = io_submit (priv->ctxp, 1, &iocb); + } + UNLOCK (&fd->lock); + + if (ret != 1) { + gf_log (this->name, GF_LOG_ERROR, + "io_submit() returned %d", ret); + op_errno = -ret; + goto err; + } + + return 0; +err: + STACK_UNWIND_STRICT (writev, frame, -1, op_errno, 0, 0, 0); + + if (paiocb) { + if (paiocb->iobref) + iobref_unref (paiocb->iobref); + GF_FREE (paiocb); + } + + return 0; +} + +void * +bd_aio_thread (void *data) +{ + xlator_t *this = NULL; + bd_priv_t *priv = NULL; + int ret = 0; + int i = 0; + struct io_event *event = NULL; + struct bd_aio_cb *paiocb = NULL; + struct io_event events[BD_AIO_MAX_NR_GETEVENTS]; + struct timespec ts = {0, }; + + this = data; + THIS = this; + priv = this->private; + + ts.tv_sec = 5; + for (;;) { + memset (&events[0], 0, sizeof (events)); + ret = io_getevents (priv->ctxp, 1, BD_AIO_MAX_NR_GETEVENTS, + &events[0], &ts); + if (ret < 0) { + if (ret == -EINTR) + continue; + gf_log (this->name, GF_LOG_ERROR, + "io_getevents() returned %d, exiting", ret); + break; + } + + for (i = 0; i < ret; i++) { + event = &events[i]; + + paiocb = event->data; + + switch (paiocb->op) { + case GF_FOP_READ: + bd_aio_readv_complete (paiocb, event->res, + event->res2); + break; + case GF_FOP_WRITE: + bd_aio_writev_complete (paiocb, event->res, + event->res2); + break; + default: + gf_log (this->name, GF_LOG_ERROR, + "unknown op %d found in piocb", + paiocb->op); + break; + } + } + } + + return NULL; +} + +int +bd_aio_init (xlator_t *this) +{ + bd_priv_t *priv = NULL; + int ret = 0; + + priv = this->private; + + ret = io_setup (BD_AIO_MAX_NR_EVENTS, &priv->ctxp); + if ((ret == -1 && errno == ENOSYS) || ret == -ENOSYS) { + gf_log (this->name, GF_LOG_WARNING, + "Linux AIO not available at run-time." + " Continuing with synchronous IO"); + ret = 0; + goto out; + } + + if (ret < 0) { + gf_log (this->name, GF_LOG_WARNING, + "io_setup() failed. ret=%d, errno=%d", + ret, errno); + goto out; + } + + ret = pthread_create (&priv->aiothread, NULL, + bd_aio_thread, this); + if (ret != 0) { + io_destroy (priv->ctxp); + goto out; + } + + this->fops->readv = bd_aio_readv; + this->fops->writev = bd_aio_writev; +out: + return ret; +} + + +int +bd_aio_on (xlator_t *this) +{ + bd_priv_t *priv = NULL; + int ret = 0; + + priv = this->private; + + if (!priv->aio_init_done) { + ret = bd_aio_init (this); + if (ret == 0) + priv->aio_capable = _gf_true; + else + priv->aio_capable = _gf_false; + priv->aio_init_done = _gf_true; + } + + if (priv->aio_capable) { + this->fops->readv = bd_aio_readv; + this->fops->writev = bd_aio_writev; + } + + return ret; +} + +int +bd_aio_off (xlator_t *this) +{ + this->fops->readv = bd_readv; + this->fops->writev = bd_writev; + + return 0; +} + +#else + +int +bd_aio_on (xlator_t *this) +{ + gf_log (this->name, GF_LOG_INFO, + "Linux AIO not available at build-time." + " Continuing with synchronous IO"); + return 0; +} + +int +bd_aio_off (xlator_t *this) +{ + gf_log (this->name, GF_LOG_INFO, + "Linux AIO not available at build-time." + " Continuing with synchronous IO"); + return 0; +} + +void +__bd_fd_set_odirect (fd_t *fd, struct bd_fd *pfd, int opflags, + off_t offset, size_t size) +{ + xlator_t *this = THIS; + gf_log (this->name, GF_LOG_INFO, + "Linux AIO not available at build-time." + " Continuing with synchronous IO"); + return; +} +#endif |