aboutsummaryrefslogtreecommitdiffstats
path: root/fs/exofs/ios.c
diff options
context:
space:
mode:
authorBoaz Harrosh <bharrosh@panasas.com>2009-11-08 14:54:08 +0200
committerBoaz Harrosh <bharrosh@panasas.com>2009-12-10 09:59:22 +0200
commit06886a5a3dc5a5abe0a4d257c26317bde7047be8 (patch)
tree858ac56e120c0473d764fc64a2660e6d79729c8c /fs/exofs/ios.c
parent8ce9bdd1fbe962933736d7977e972972cd5d754c (diff)
exofs: Move all operations to an io_engine
In anticipation for multi-device operations, we separate osd operations into an abstract I/O API. Currently only one device is used but later when adding more devices, we will drive all devices in parallel according to a "data_map" that describes how data is arranged on multiple devices. The file system level operates, like before, as if there is one object (inode-number) and an i_size. The io engine will split this to the same object-number but on multiple device. At first we introduce Mirror (raid 1) layout. But at the final outcome we intend to fully implement the pNFS-Objects data-map, including raid 0,4,5,6 over mirrored devices, over multiple device-groups. And more. See: http://tools.ietf.org/html/draft-ietf-nfsv4-pnfs-obj-12 * Define an io_state based API for accessing osd storage devices in an abstract way. Usage: First a caller allocates an io state with: exofs_get_io_state(struct exofs_sb_info *sbi, struct exofs_io_state** ios); Then calles one of: exofs_sbi_create(struct exofs_io_state *ios); exofs_sbi_remove(struct exofs_io_state *ios); exofs_sbi_write(struct exofs_io_state *ios); exofs_sbi_read(struct exofs_io_state *ios); exofs_oi_truncate(struct exofs_i_info *oi, u64 new_len); And when done exofs_put_io_state(struct exofs_io_state *ios); * Convert all source files to use this new API * Convert from bio_alloc to bio_kmalloc * In io engine we make use of the now fixed osd_req_decode_sense There are no functional changes or on disk additions after this patch. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Diffstat (limited to 'fs/exofs/ios.c')
-rw-r--r--fs/exofs/ios.c386
1 files changed, 333 insertions, 53 deletions
diff --git a/fs/exofs/ios.c b/fs/exofs/ios.c
index 4372542df28..bb2f9d341fd 100644
--- a/fs/exofs/ios.c
+++ b/fs/exofs/ios.c
@@ -23,88 +23,327 @@
*/
#include <scsi/scsi_device.h>
-#include <scsi/osd_sense.h>
#include "exofs.h"
-int exofs_check_ok_resid(struct osd_request *or, u64 *in_resid, u64 *out_resid)
+void exofs_make_credential(u8 cred_a[OSD_CAP_LEN], const struct osd_obj_id *obj)
{
- struct osd_sense_info osi;
- int ret = osd_req_decode_sense(or, &osi);
-
- if (ret) { /* translate to Linux codes */
- if (osi.additional_code == scsi_invalid_field_in_cdb) {
- if (osi.cdb_field_offset == OSD_CFO_STARTING_BYTE)
- ret = -EFAULT;
- if (osi.cdb_field_offset == OSD_CFO_OBJECT_ID)
- ret = -ENOENT;
- else
- ret = -EINVAL;
- } else if (osi.additional_code == osd_quota_error)
- ret = -ENOSPC;
- else
- ret = -EIO;
+ osd_sec_init_nosec_doall_caps(cred_a, obj, false, true);
+}
+
+int exofs_read_kern(struct osd_dev *od, u8 *cred, struct osd_obj_id *obj,
+ u64 offset, void *p, unsigned length)
+{
+ struct osd_request *or = osd_start_request(od, GFP_KERNEL);
+/* struct osd_sense_info osi = {.key = 0};*/
+ int ret;
+
+ if (unlikely(!or)) {
+ EXOFS_DBGMSG("%s: osd_start_request failed.\n", __func__);
+ return -ENOMEM;
+ }
+ ret = osd_req_read_kern(or, obj, offset, p, length);
+ if (unlikely(ret)) {
+ EXOFS_DBGMSG("%s: osd_req_read_kern failed.\n", __func__);
+ goto out;
}
- /* FIXME: should be include in osd_sense_info */
- if (in_resid)
- *in_resid = or->in.req ? or->in.req->resid_len : 0;
+ ret = osd_finalize_request(or, 0, cred, NULL);
+ if (unlikely(ret)) {
+ EXOFS_DBGMSG("Faild to osd_finalize_request() => %d\n", ret);
+ goto out;
+ }
- if (out_resid)
- *out_resid = or->out.req ? or->out.req->resid_len : 0;
+ ret = osd_execute_request(or);
+ if (unlikely(ret))
+ EXOFS_DBGMSG("osd_execute_request() => %d\n", ret);
+ /* osd_req_decode_sense(or, ret); */
+out:
+ osd_end_request(or);
return ret;
}
-void exofs_make_credential(u8 cred_a[OSD_CAP_LEN], const struct osd_obj_id *obj)
+int exofs_get_io_state(struct exofs_sb_info *sbi, struct exofs_io_state** pios)
{
- osd_sec_init_nosec_doall_caps(cred_a, obj, false, true);
+ struct exofs_io_state *ios;
+
+ /*TODO: Maybe use kmem_cach per sbi of size
+ * exofs_io_state_size(sbi->s_numdevs)
+ */
+ ios = kzalloc(exofs_io_state_size(1), GFP_KERNEL);
+ if (unlikely(!ios)) {
+ *pios = NULL;
+ return -ENOMEM;
+ }
+
+ ios->sbi = sbi;
+ ios->obj.partition = sbi->s_pid;
+ *pios = ios;
+ return 0;
}
-/*
- * Perform a synchronous OSD operation.
- */
-int exofs_sync_op(struct osd_request *or, int timeout, uint8_t *credential)
+void exofs_put_io_state(struct exofs_io_state *ios)
{
- int ret;
+ if (ios) {
+ unsigned i;
- or->timeout = timeout;
- ret = osd_finalize_request(or, 0, credential, NULL);
- if (ret) {
- EXOFS_DBGMSG("Faild to osd_finalize_request() => %d\n", ret);
- return ret;
+ for (i = 0; i < ios->numdevs; i++) {
+ struct exofs_per_dev_state *per_dev = &ios->per_dev[i];
+
+ if (per_dev->or)
+ osd_end_request(per_dev->or);
+ if (per_dev->bio)
+ bio_put(per_dev->bio);
+ }
+
+ kfree(ios);
}
+}
- ret = osd_execute_request(or);
+static void _sync_done(struct exofs_io_state *ios, void *p)
+{
+ struct completion *waiting = p;
- if (ret)
- EXOFS_DBGMSG("osd_execute_request() => %d\n", ret);
- /* osd_req_decode_sense(or, ret); */
+ complete(waiting);
+}
+
+static void _last_io(struct kref *kref)
+{
+ struct exofs_io_state *ios = container_of(
+ kref, struct exofs_io_state, kref);
+
+ ios->done(ios, ios->private);
+}
+
+static void _done_io(struct osd_request *or, void *p)
+{
+ struct exofs_io_state *ios = p;
+
+ kref_put(&ios->kref, _last_io);
+}
+
+static int exofs_io_execute(struct exofs_io_state *ios)
+{
+ DECLARE_COMPLETION_ONSTACK(wait);
+ bool sync = (ios->done == NULL);
+ int i, ret;
+
+ if (sync) {
+ ios->done = _sync_done;
+ ios->private = &wait;
+ }
+
+ for (i = 0; i < ios->numdevs; i++) {
+ struct osd_request *or = ios->per_dev[i].or;
+ if (unlikely(!or))
+ continue;
+
+ ret = osd_finalize_request(or, 0, ios->cred, NULL);
+ if (unlikely(ret)) {
+ EXOFS_DBGMSG("Faild to osd_finalize_request() => %d\n",
+ ret);
+ return ret;
+ }
+ }
+
+ kref_init(&ios->kref);
+
+ for (i = 0; i < ios->numdevs; i++) {
+ struct osd_request *or = ios->per_dev[i].or;
+ if (unlikely(!or))
+ continue;
+
+ kref_get(&ios->kref);
+ osd_execute_request_async(or, _done_io, ios);
+ }
+
+ kref_put(&ios->kref, _last_io);
+ ret = 0;
+
+ if (sync) {
+ wait_for_completion(&wait);
+ ret = exofs_check_io(ios, NULL);
+ }
return ret;
}
-/*
- * Perform an asynchronous OSD operation.
- */
-int exofs_async_op(struct osd_request *or, osd_req_done_fn *async_done,
- void *caller_context, u8 *cred)
+int exofs_check_io(struct exofs_io_state *ios, u64 *resid)
{
- int ret;
+ enum osd_err_priority acumulated_osd_err = 0;
+ int acumulated_lin_err = 0;
+ int i;
- ret = osd_finalize_request(or, 0, cred, NULL);
- if (ret) {
- EXOFS_DBGMSG("Faild to osd_finalize_request() => %d\n", ret);
- return ret;
+ for (i = 0; i < ios->numdevs; i++) {
+ struct osd_sense_info osi;
+ int ret = osd_req_decode_sense(ios->per_dev[i].or, &osi);
+
+ if (likely(!ret))
+ continue;
+
+ if (unlikely(ret == -EFAULT)) {
+ EXOFS_DBGMSG("%s: EFAULT Need page clear\n", __func__);
+ /*FIXME: All the pages in this device range should:
+ * clear_highpage(page);
+ */
+ }
+
+ if (osi.osd_err_pri >= acumulated_osd_err) {
+ acumulated_osd_err = osi.osd_err_pri;
+ acumulated_lin_err = ret;
+ }
+ }
+
+ /* TODO: raid specific residual calculations */
+ if (resid) {
+ if (likely(!acumulated_lin_err))
+ *resid = 0;
+ else
+ *resid = ios->length;
+ }
+
+ return acumulated_lin_err;
+}
+
+int exofs_sbi_create(struct exofs_io_state *ios)
+{
+ int i, ret;
+
+ for (i = 0; i < 1; i++) {
+ struct osd_request *or;
+
+ or = osd_start_request(ios->sbi->s_dev, GFP_KERNEL);
+ if (unlikely(!or)) {
+ EXOFS_ERR("%s: osd_start_request failed\n", __func__);
+ ret = -ENOMEM;
+ goto out;
+ }
+ ios->per_dev[i].or = or;
+ ios->numdevs++;
+
+ osd_req_create_object(or, &ios->obj);
+ }
+ ret = exofs_io_execute(ios);
+
+out:
+ return ret;
+}
+
+int exofs_sbi_remove(struct exofs_io_state *ios)
+{
+ int i, ret;
+
+ for (i = 0; i < 1; i++) {
+ struct osd_request *or;
+
+ or = osd_start_request(ios->sbi->s_dev, GFP_KERNEL);
+ if (unlikely(!or)) {
+ EXOFS_ERR("%s: osd_start_request failed\n", __func__);
+ ret = -ENOMEM;
+ goto out;
+ }
+ ios->per_dev[i].or = or;
+ ios->numdevs++;
+
+ osd_req_remove_object(or, &ios->obj);
+ }
+ ret = exofs_io_execute(ios);
+
+out:
+ return ret;
+}
+
+int exofs_sbi_write(struct exofs_io_state *ios)
+{
+ int i, ret;
+
+ for (i = 0; i < 1; i++) {
+ struct osd_request *or;
+
+ or = osd_start_request(ios->sbi->s_dev, GFP_KERNEL);
+ if (unlikely(!or)) {
+ EXOFS_ERR("%s: osd_start_request failed\n", __func__);
+ ret = -ENOMEM;
+ goto out;
+ }
+ ios->per_dev[i].or = or;
+ ios->numdevs++;
+
+ if (ios->bio) {
+ struct bio *bio;
+
+ bio = ios->bio;
+
+ osd_req_write(or, &ios->obj, ios->offset, bio,
+ ios->length);
+/* EXOFS_DBGMSG("write sync=%d\n", sync);*/
+ } else if (ios->kern_buff) {
+ osd_req_write_kern(or, &ios->obj, ios->offset,
+ ios->kern_buff, ios->length);
+/* EXOFS_DBGMSG("write_kern sync=%d\n", sync);*/
+ } else {
+ osd_req_set_attributes(or, &ios->obj);
+/* EXOFS_DBGMSG("set_attributes sync=%d\n", sync);*/
+ }
+
+ if (ios->out_attr)
+ osd_req_add_set_attr_list(or, ios->out_attr,
+ ios->out_attr_len);
+
+ if (ios->in_attr)
+ osd_req_add_get_attr_list(or, ios->in_attr,
+ ios->in_attr_len);
}
+ ret = exofs_io_execute(ios);
+
+out:
+ return ret;
+}
+
+int exofs_sbi_read(struct exofs_io_state *ios)
+{
+ int i, ret;
+
+ for (i = 0; i < 1; i++) {
+ struct osd_request *or;
+
+ or = osd_start_request(ios->sbi->s_dev, GFP_KERNEL);
+ if (unlikely(!or)) {
+ EXOFS_ERR("%s: osd_start_request failed\n", __func__);
+ ret = -ENOMEM;
+ goto out;
+ }
+ ios->per_dev[i].or = or;
+ ios->numdevs++;
+
+ if (ios->bio) {
+ osd_req_read(or, &ios->obj, ios->offset, ios->bio,
+ ios->length);
+/* EXOFS_DBGMSG("read sync=%d\n", sync);*/
+ } else if (ios->kern_buff) {
+ osd_req_read_kern(or, &ios->obj, ios->offset,
+ ios->kern_buff, ios->length);
+/* EXOFS_DBGMSG("read_kern sync=%d\n", sync);*/
+ } else {
+ osd_req_get_attributes(or, &ios->obj);
+/* EXOFS_DBGMSG("get_attributes sync=%d\n", sync);*/
+ }
+
+ if (ios->out_attr)
+ osd_req_add_set_attr_list(or, ios->out_attr,
+ ios->out_attr_len);
- ret = osd_execute_request_async(or, async_done, caller_context);
+ if (ios->in_attr)
+ osd_req_add_get_attr_list(or, ios->in_attr,
+ ios->in_attr_len);
+ }
+ ret = exofs_io_execute(ios);
- if (ret)
- EXOFS_DBGMSG("osd_execute_request_async() => %d\n", ret);
+out:
return ret;
}
-int extract_attr_from_req(struct osd_request *or, struct osd_attr *attr)
+int extract_attr_from_ios(struct exofs_io_state *ios, struct osd_attr *attr)
{
struct osd_attr cur_attr = {.attr_page = 0}; /* start with zeros */
void *iter = NULL;
@@ -112,7 +351,8 @@ int extract_attr_from_req(struct osd_request *or, struct osd_attr *attr)
do {
nelem = 1;
- osd_req_decode_get_attr_list(or, &cur_attr, &nelem, &iter);
+ osd_req_decode_get_attr_list(ios->per_dev[0].or,
+ &cur_attr, &nelem, &iter);
if ((cur_attr.attr_page == attr->attr_page) &&
(cur_attr.attr_id == attr->attr_id)) {
attr->len = cur_attr.len;
@@ -123,3 +363,43 @@ int extract_attr_from_req(struct osd_request *or, struct osd_attr *attr)
return -EIO;
}
+
+int exofs_oi_truncate(struct exofs_i_info *oi, u64 size)
+{
+ struct exofs_sb_info *sbi = oi->vfs_inode.i_sb->s_fs_info;
+ struct exofs_io_state *ios;
+ struct osd_attr attr;
+ __be64 newsize;
+ int i, ret;
+
+ if (exofs_get_io_state(sbi, &ios))
+ return -ENOMEM;
+
+ ios->obj.id = exofs_oi_objno(oi);
+ ios->cred = oi->i_cred;
+
+ newsize = cpu_to_be64(size);
+ attr = g_attr_logical_length;
+ attr.val_ptr = &newsize;
+
+ for (i = 0; i < 1; i++) {
+ struct osd_request *or;
+
+ or = osd_start_request(sbi->s_dev, GFP_KERNEL);
+ if (unlikely(!or)) {
+ EXOFS_ERR("%s: osd_start_request failed\n", __func__);
+ ret = -ENOMEM;
+ goto out;
+ }
+ ios->per_dev[i].or = or;
+ ios->numdevs++;
+
+ osd_req_set_attributes(or, &ios->obj);
+ osd_req_add_set_attr_list(or, &attr, 1);
+ }
+ ret = exofs_io_execute(ios);
+
+out:
+ exofs_put_io_state(ios);
+ return ret;
+}