NFSv4.1: pnfs: filelayout: add driver's LAYOUTGET and GETDEVICEINFO infrastructure
Implement the driver's io_ops->alloc_lseg and free_lseg functions, which integrate into the deviceid cache and calls out to nfs4_proc_getdeviceinfo when necessary. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Dean Hildebrand <dhildebz@umich.edu> Signed-off-by: Marc Eshel <eshel@almaden.ibm.com> Signed-off-by: Mike Sager <sager@netapp.com> Signed-off-by: Oleg Drokin <green@linuxhacker.ru> Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com> Signed-off-by: Tao Guo <guotao@nrchpc.ac.cn> Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Andy Adamson
Trond Myklebust
parent
b1f69b754e
commit
16b374ca43
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@ -20,4 +20,4 @@ nfs-$(CONFIG_SYSCTL) += sysctl.o
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nfs-$(CONFIG_NFS_FSCACHE) += fscache.o fscache-index.o
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obj-$(CONFIG_PNFS_FILE_LAYOUT) += nfs_layout_nfsv41_files.o
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nfs_layout_nfsv41_files-y := nfs4filelayout.o
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nfs_layout_nfsv41_files-y := nfs4filelayout.o nfs4filelayoutdev.o
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@ -255,6 +255,7 @@ void nfs_put_client(struct nfs_client *clp)
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nfs_free_client(clp);
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}
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}
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EXPORT_SYMBOL_GPL(nfs_put_client);
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#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
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/*
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@ -30,7 +30,9 @@
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*/
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#include <linux/nfs_fs.h>
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#include "pnfs.h"
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#include "internal.h"
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#include "nfs4filelayout.h"
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#define NFSDBG_FACILITY NFSDBG_PNFS_LD
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@ -41,23 +43,223 @@ MODULE_DESCRIPTION("The NFSv4 file layout driver");
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int
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filelayout_initialize_mountpoint(struct nfs_server *nfss)
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{
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int status = pnfs_alloc_init_deviceid_cache(nfss->nfs_client,
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nfs4_fl_free_deviceid_callback);
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if (status) {
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printk(KERN_WARNING "%s: deviceid cache could not be "
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"initialized\n", __func__);
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return status;
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}
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dprintk("%s: deviceid cache has been initialized successfully\n",
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__func__);
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return 0;
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}
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/* Uninitialize a mountpoint by destroying its device list */
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int
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filelayout_uninitialize_mountpoint(struct nfs_server *nfss)
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{
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dprintk("--> %s\n", __func__);
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if (nfss->nfs_client->cl_devid_cache)
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pnfs_put_deviceid_cache(nfss->nfs_client);
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return 0;
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}
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/*
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* filelayout_check_layout()
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*
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* Make sure layout segment parameters are sane WRT the device.
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* At this point no generic layer initialization of the lseg has occurred,
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* and nothing has been added to the layout_hdr cache.
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*
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*/
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static int
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filelayout_check_layout(struct pnfs_layout_hdr *lo,
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struct nfs4_filelayout_segment *fl,
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struct nfs4_layoutget_res *lgr,
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struct nfs4_deviceid *id)
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{
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struct nfs4_file_layout_dsaddr *dsaddr;
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int status = -EINVAL;
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struct nfs_server *nfss = NFS_SERVER(lo->inode);
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dprintk("--> %s\n", __func__);
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if (fl->pattern_offset > lgr->range.offset) {
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dprintk("%s pattern_offset %lld to large\n",
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__func__, fl->pattern_offset);
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goto out;
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}
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if (fl->stripe_unit % PAGE_SIZE) {
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dprintk("%s Stripe unit (%u) not page aligned\n",
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__func__, fl->stripe_unit);
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goto out;
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}
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/* find and reference the deviceid */
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dsaddr = nfs4_fl_find_get_deviceid(nfss->nfs_client, id);
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if (dsaddr == NULL) {
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dsaddr = get_device_info(lo->inode, id);
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if (dsaddr == NULL)
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goto out;
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}
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fl->dsaddr = dsaddr;
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if (fl->first_stripe_index < 0 ||
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fl->first_stripe_index >= dsaddr->stripe_count) {
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dprintk("%s Bad first_stripe_index %d\n",
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__func__, fl->first_stripe_index);
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goto out_put;
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}
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if ((fl->stripe_type == STRIPE_SPARSE &&
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fl->num_fh > 1 && fl->num_fh != dsaddr->ds_num) ||
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(fl->stripe_type == STRIPE_DENSE &&
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fl->num_fh != dsaddr->stripe_count)) {
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dprintk("%s num_fh %u not valid for given packing\n",
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__func__, fl->num_fh);
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goto out_put;
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}
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if (fl->stripe_unit % nfss->rsize || fl->stripe_unit % nfss->wsize) {
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dprintk("%s Stripe unit (%u) not aligned with rsize %u "
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"wsize %u\n", __func__, fl->stripe_unit, nfss->rsize,
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nfss->wsize);
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}
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status = 0;
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out:
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dprintk("--> %s returns %d\n", __func__, status);
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return status;
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out_put:
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pnfs_put_deviceid(nfss->nfs_client->cl_devid_cache, &dsaddr->deviceid);
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goto out;
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}
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static void filelayout_free_fh_array(struct nfs4_filelayout_segment *fl)
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{
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int i;
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for (i = 0; i < fl->num_fh; i++) {
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if (!fl->fh_array[i])
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break;
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kfree(fl->fh_array[i]);
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}
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kfree(fl->fh_array);
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fl->fh_array = NULL;
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}
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static void
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_filelayout_free_lseg(struct nfs4_filelayout_segment *fl)
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{
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filelayout_free_fh_array(fl);
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kfree(fl);
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}
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static int
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filelayout_decode_layout(struct pnfs_layout_hdr *flo,
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struct nfs4_filelayout_segment *fl,
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struct nfs4_layoutget_res *lgr,
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struct nfs4_deviceid *id)
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{
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uint32_t *p = (uint32_t *)lgr->layout.buf;
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uint32_t nfl_util;
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int i;
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dprintk("%s: set_layout_map Begin\n", __func__);
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memcpy(id, p, sizeof(*id));
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p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE);
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print_deviceid(id);
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nfl_util = be32_to_cpup(p++);
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if (nfl_util & NFL4_UFLG_COMMIT_THRU_MDS)
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fl->commit_through_mds = 1;
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if (nfl_util & NFL4_UFLG_DENSE)
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fl->stripe_type = STRIPE_DENSE;
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else
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fl->stripe_type = STRIPE_SPARSE;
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fl->stripe_unit = nfl_util & ~NFL4_UFLG_MASK;
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fl->first_stripe_index = be32_to_cpup(p++);
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p = xdr_decode_hyper(p, &fl->pattern_offset);
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fl->num_fh = be32_to_cpup(p++);
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dprintk("%s: nfl_util 0x%X num_fh %u fsi %u po %llu\n",
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__func__, nfl_util, fl->num_fh, fl->first_stripe_index,
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fl->pattern_offset);
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fl->fh_array = kzalloc(fl->num_fh * sizeof(struct nfs_fh *),
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GFP_KERNEL);
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if (!fl->fh_array)
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return -ENOMEM;
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for (i = 0; i < fl->num_fh; i++) {
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/* Do we want to use a mempool here? */
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fl->fh_array[i] = kmalloc(sizeof(struct nfs_fh), GFP_KERNEL);
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if (!fl->fh_array[i]) {
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filelayout_free_fh_array(fl);
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return -ENOMEM;
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}
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fl->fh_array[i]->size = be32_to_cpup(p++);
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if (sizeof(struct nfs_fh) < fl->fh_array[i]->size) {
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printk(KERN_ERR "Too big fh %d received %d\n",
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i, fl->fh_array[i]->size);
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filelayout_free_fh_array(fl);
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return -EIO;
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}
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memcpy(fl->fh_array[i]->data, p, fl->fh_array[i]->size);
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p += XDR_QUADLEN(fl->fh_array[i]->size);
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dprintk("DEBUG: %s: fh len %d\n", __func__,
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fl->fh_array[i]->size);
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}
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return 0;
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}
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static struct pnfs_layout_segment *
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filelayout_alloc_lseg(struct pnfs_layout_hdr *layoutid,
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struct nfs4_layoutget_res *lgr)
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{
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struct nfs4_filelayout_segment *fl;
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int rc;
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struct nfs4_deviceid id;
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dprintk("--> %s\n", __func__);
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fl = kzalloc(sizeof(*fl), GFP_KERNEL);
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if (!fl)
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return NULL;
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rc = filelayout_decode_layout(layoutid, fl, lgr, &id);
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if (rc != 0 || filelayout_check_layout(layoutid, fl, lgr, &id)) {
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_filelayout_free_lseg(fl);
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return NULL;
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}
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return &fl->generic_hdr;
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}
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static void
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filelayout_free_lseg(struct pnfs_layout_segment *lseg)
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{
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struct nfs_server *nfss = NFS_SERVER(lseg->layout->inode);
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struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg);
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dprintk("--> %s\n", __func__);
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pnfs_put_deviceid(nfss->nfs_client->cl_devid_cache,
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&fl->dsaddr->deviceid);
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_filelayout_free_lseg(fl);
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}
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static struct pnfs_layoutdriver_type filelayout_type = {
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.id = LAYOUT_NFSV4_1_FILES,
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.name = "LAYOUT_NFSV4_1_FILES",
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.owner = THIS_MODULE,
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.initialize_mountpoint = filelayout_initialize_mountpoint,
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.uninitialize_mountpoint = filelayout_uninitialize_mountpoint,
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.alloc_lseg = filelayout_alloc_lseg,
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.free_lseg = filelayout_free_lseg,
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};
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static int __init nfs4filelayout_init(void)
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@ -0,0 +1,94 @@
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/*
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* NFSv4 file layout driver data structures.
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*
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* Copyright (c) 2002
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* The Regents of the University of Michigan
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* All Rights Reserved
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*
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* Dean Hildebrand <dhildebz@umich.edu>
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*
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* Permission is granted to use, copy, create derivative works, and
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* redistribute this software and such derivative works for any purpose,
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* so long as the name of the University of Michigan is not used in
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* any advertising or publicity pertaining to the use or distribution
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* of this software without specific, written prior authorization. If
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* the above copyright notice or any other identification of the
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* University of Michigan is included in any copy of any portion of
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* this software, then the disclaimer below must also be included.
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*
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* This software is provided as is, without representation or warranty
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* of any kind either express or implied, including without limitation
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* the implied warranties of merchantability, fitness for a particular
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* purpose, or noninfringement. The Regents of the University of
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* Michigan shall not be liable for any damages, including special,
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* indirect, incidental, or consequential damages, with respect to any
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* claim arising out of or in connection with the use of the software,
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* even if it has been or is hereafter advised of the possibility of
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* such damages.
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*/
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#ifndef FS_NFS_NFS4FILELAYOUT_H
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#define FS_NFS_NFS4FILELAYOUT_H
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#include "pnfs.h"
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/*
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* Field testing shows we need to support upto 4096 stripe indices.
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* We store each index as a u8 (u32 on the wire) to keep the memory footprint
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* reasonable. This in turn means we support a maximum of 256
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* RFC 5661 multipath_list4 structures.
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*/
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#define NFS4_PNFS_MAX_STRIPE_CNT 4096
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#define NFS4_PNFS_MAX_MULTI_CNT 256 /* 256 fit into a u8 stripe_index */
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enum stripetype4 {
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STRIPE_SPARSE = 1,
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STRIPE_DENSE = 2
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};
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/* Individual ip address */
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struct nfs4_pnfs_ds {
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struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */
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u32 ds_ip_addr;
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u32 ds_port;
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struct nfs_client *ds_clp;
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atomic_t ds_count;
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};
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struct nfs4_file_layout_dsaddr {
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struct pnfs_deviceid_node deviceid;
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u32 stripe_count;
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u8 *stripe_indices;
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u32 ds_num;
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struct nfs4_pnfs_ds *ds_list[1];
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};
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struct nfs4_filelayout_segment {
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struct pnfs_layout_segment generic_hdr;
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u32 stripe_type;
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u32 commit_through_mds;
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u32 stripe_unit;
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u32 first_stripe_index;
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u64 pattern_offset;
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struct nfs4_file_layout_dsaddr *dsaddr; /* Point to GETDEVINFO data */
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unsigned int num_fh;
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struct nfs_fh **fh_array;
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};
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static inline struct nfs4_filelayout_segment *
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FILELAYOUT_LSEG(struct pnfs_layout_segment *lseg)
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{
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return container_of(lseg,
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struct nfs4_filelayout_segment,
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generic_hdr);
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}
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extern void nfs4_fl_free_deviceid_callback(struct pnfs_deviceid_node *);
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extern void print_ds(struct nfs4_pnfs_ds *ds);
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extern void print_deviceid(struct nfs4_deviceid *dev_id);
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extern struct nfs4_file_layout_dsaddr *
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nfs4_fl_find_get_deviceid(struct nfs_client *, struct nfs4_deviceid *dev_id);
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struct nfs4_file_layout_dsaddr *
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get_device_info(struct inode *inode, struct nfs4_deviceid *dev_id);
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#endif /* FS_NFS_NFS4FILELAYOUT_H */
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@ -0,0 +1,448 @@
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/*
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* Device operations for the pnfs nfs4 file layout driver.
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*
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* Copyright (c) 2002
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* The Regents of the University of Michigan
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* All Rights Reserved
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*
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* Dean Hildebrand <dhildebz@umich.edu>
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* Garth Goodson <Garth.Goodson@netapp.com>
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*
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* Permission is granted to use, copy, create derivative works, and
|
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* redistribute this software and such derivative works for any purpose,
|
||||
* so long as the name of the University of Michigan is not used in
|
||||
* any advertising or publicity pertaining to the use or distribution
|
||||
* of this software without specific, written prior authorization. If
|
||||
* the above copyright notice or any other identification of the
|
||||
* University of Michigan is included in any copy of any portion of
|
||||
* this software, then the disclaimer below must also be included.
|
||||
*
|
||||
* This software is provided as is, without representation or warranty
|
||||
* of any kind either express or implied, including without limitation
|
||||
* the implied warranties of merchantability, fitness for a particular
|
||||
* purpose, or noninfringement. The Regents of the University of
|
||||
* Michigan shall not be liable for any damages, including special,
|
||||
* indirect, incidental, or consequential damages, with respect to any
|
||||
* claim arising out of or in connection with the use of the software,
|
||||
* even if it has been or is hereafter advised of the possibility of
|
||||
* such damages.
|
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*/
|
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|
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#include <linux/nfs_fs.h>
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#include <linux/vmalloc.h>
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#include "internal.h"
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#include "nfs4filelayout.h"
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#define NFSDBG_FACILITY NFSDBG_PNFS_LD
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/*
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* Data server cache
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*
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* Data servers can be mapped to different device ids.
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* nfs4_pnfs_ds reference counting
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* - set to 1 on allocation
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* - incremented when a device id maps a data server already in the cache.
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* - decremented when deviceid is removed from the cache.
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*/
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DEFINE_SPINLOCK(nfs4_ds_cache_lock);
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static LIST_HEAD(nfs4_data_server_cache);
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/* Debug routines */
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void
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print_ds(struct nfs4_pnfs_ds *ds)
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{
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if (ds == NULL) {
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printk("%s NULL device\n", __func__);
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return;
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}
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printk(" ip_addr %x port %hu\n"
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" ref count %d\n"
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" client %p\n"
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" cl_exchange_flags %x\n",
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ntohl(ds->ds_ip_addr), ntohs(ds->ds_port),
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atomic_read(&ds->ds_count), ds->ds_clp,
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ds->ds_clp ? ds->ds_clp->cl_exchange_flags : 0);
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}
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void
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print_ds_list(struct nfs4_file_layout_dsaddr *dsaddr)
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{
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int i;
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ifdebug(FACILITY) {
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printk("%s dsaddr->ds_num %d\n", __func__,
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dsaddr->ds_num);
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for (i = 0; i < dsaddr->ds_num; i++)
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print_ds(dsaddr->ds_list[i]);
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}
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}
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void print_deviceid(struct nfs4_deviceid *id)
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{
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u32 *p = (u32 *)id;
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dprintk("%s: device id= [%x%x%x%x]\n", __func__,
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p[0], p[1], p[2], p[3]);
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}
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|
||||
/* nfs4_ds_cache_lock is held */
|
||||
static struct nfs4_pnfs_ds *
|
||||
_data_server_lookup_locked(u32 ip_addr, u32 port)
|
||||
{
|
||||
struct nfs4_pnfs_ds *ds;
|
||||
|
||||
dprintk("_data_server_lookup: ip_addr=%x port=%hu\n",
|
||||
ntohl(ip_addr), ntohs(port));
|
||||
|
||||
list_for_each_entry(ds, &nfs4_data_server_cache, ds_node) {
|
||||
if (ds->ds_ip_addr == ip_addr &&
|
||||
ds->ds_port == port) {
|
||||
return ds;
|
||||
}
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static void
|
||||
destroy_ds(struct nfs4_pnfs_ds *ds)
|
||||
{
|
||||
dprintk("--> %s\n", __func__);
|
||||
ifdebug(FACILITY)
|
||||
print_ds(ds);
|
||||
|
||||
if (ds->ds_clp)
|
||||
nfs_put_client(ds->ds_clp);
|
||||
kfree(ds);
|
||||
}
|
||||
|
||||
static void
|
||||
nfs4_fl_free_deviceid(struct nfs4_file_layout_dsaddr *dsaddr)
|
||||
{
|
||||
struct nfs4_pnfs_ds *ds;
|
||||
int i;
|
||||
|
||||
print_deviceid(&dsaddr->deviceid.de_id);
|
||||
|
||||
for (i = 0; i < dsaddr->ds_num; i++) {
|
||||
ds = dsaddr->ds_list[i];
|
||||
if (ds != NULL) {
|
||||
if (atomic_dec_and_lock(&ds->ds_count,
|
||||
&nfs4_ds_cache_lock)) {
|
||||
list_del_init(&ds->ds_node);
|
||||
spin_unlock(&nfs4_ds_cache_lock);
|
||||
destroy_ds(ds);
|
||||
}
|
||||
}
|
||||
}
|
||||
kfree(dsaddr->stripe_indices);
|
||||
kfree(dsaddr);
|
||||
}
|
||||
|
||||
void
|
||||
nfs4_fl_free_deviceid_callback(struct pnfs_deviceid_node *device)
|
||||
{
|
||||
struct nfs4_file_layout_dsaddr *dsaddr =
|
||||
container_of(device, struct nfs4_file_layout_dsaddr, deviceid);
|
||||
|
||||
nfs4_fl_free_deviceid(dsaddr);
|
||||
}
|
||||
|
||||
static struct nfs4_pnfs_ds *
|
||||
nfs4_pnfs_ds_add(struct inode *inode, u32 ip_addr, u32 port)
|
||||
{
|
||||
struct nfs4_pnfs_ds *tmp_ds, *ds;
|
||||
|
||||
ds = kzalloc(sizeof(*tmp_ds), GFP_KERNEL);
|
||||
if (!ds)
|
||||
goto out;
|
||||
|
||||
spin_lock(&nfs4_ds_cache_lock);
|
||||
tmp_ds = _data_server_lookup_locked(ip_addr, port);
|
||||
if (tmp_ds == NULL) {
|
||||
ds->ds_ip_addr = ip_addr;
|
||||
ds->ds_port = port;
|
||||
atomic_set(&ds->ds_count, 1);
|
||||
INIT_LIST_HEAD(&ds->ds_node);
|
||||
ds->ds_clp = NULL;
|
||||
list_add(&ds->ds_node, &nfs4_data_server_cache);
|
||||
dprintk("%s add new data server ip 0x%x\n", __func__,
|
||||
ds->ds_ip_addr);
|
||||
} else {
|
||||
kfree(ds);
|
||||
atomic_inc(&tmp_ds->ds_count);
|
||||
dprintk("%s data server found ip 0x%x, inc'ed ds_count to %d\n",
|
||||
__func__, tmp_ds->ds_ip_addr,
|
||||
atomic_read(&tmp_ds->ds_count));
|
||||
ds = tmp_ds;
|
||||
}
|
||||
spin_unlock(&nfs4_ds_cache_lock);
|
||||
out:
|
||||
return ds;
|
||||
}
|
||||
|
||||
/*
|
||||
* Currently only support ipv4, and one multi-path address.
|
||||
*/
|
||||
static struct nfs4_pnfs_ds *
|
||||
decode_and_add_ds(__be32 **pp, struct inode *inode)
|
||||
{
|
||||
struct nfs4_pnfs_ds *ds = NULL;
|
||||
char *buf;
|
||||
const char *ipend, *pstr;
|
||||
u32 ip_addr, port;
|
||||
int nlen, rlen, i;
|
||||
int tmp[2];
|
||||
__be32 *r_netid, *r_addr, *p = *pp;
|
||||
|
||||
/* r_netid */
|
||||
nlen = be32_to_cpup(p++);
|
||||
r_netid = p;
|
||||
p += XDR_QUADLEN(nlen);
|
||||
|
||||
/* r_addr */
|
||||
rlen = be32_to_cpup(p++);
|
||||
r_addr = p;
|
||||
p += XDR_QUADLEN(rlen);
|
||||
*pp = p;
|
||||
|
||||
/* Check that netid is "tcp" */
|
||||
if (nlen != 3 || memcmp((char *)r_netid, "tcp", 3)) {
|
||||
dprintk("%s: ERROR: non ipv4 TCP r_netid\n", __func__);
|
||||
goto out_err;
|
||||
}
|
||||
|
||||
/* ipv6 length plus port is legal */
|
||||
if (rlen > INET6_ADDRSTRLEN + 8) {
|
||||
dprintk("%s Invalid address, length %d\n", __func__,
|
||||
rlen);
|
||||
goto out_err;
|
||||
}
|
||||
buf = kmalloc(rlen + 1, GFP_KERNEL);
|
||||
buf[rlen] = '\0';
|
||||
memcpy(buf, r_addr, rlen);
|
||||
|
||||
/* replace the port dots with dashes for the in4_pton() delimiter*/
|
||||
for (i = 0; i < 2; i++) {
|
||||
char *res = strrchr(buf, '.');
|
||||
*res = '-';
|
||||
}
|
||||
|
||||
/* Currently only support ipv4 address */
|
||||
if (in4_pton(buf, rlen, (u8 *)&ip_addr, '-', &ipend) == 0) {
|
||||
dprintk("%s: Only ipv4 addresses supported\n", __func__);
|
||||
goto out_free;
|
||||
}
|
||||
|
||||
/* port */
|
||||
pstr = ipend;
|
||||
sscanf(pstr, "-%d-%d", &tmp[0], &tmp[1]);
|
||||
port = htons((tmp[0] << 8) | (tmp[1]));
|
||||
|
||||
ds = nfs4_pnfs_ds_add(inode, ip_addr, port);
|
||||
dprintk("%s Decoded address and port %s\n", __func__, buf);
|
||||
out_free:
|
||||
kfree(buf);
|
||||
out_err:
|
||||
return ds;
|
||||
}
|
||||
|
||||
/* Decode opaque device data and return the result */
|
||||
static struct nfs4_file_layout_dsaddr*
|
||||
decode_device(struct inode *ino, struct pnfs_device *pdev)
|
||||
{
|
||||
int i, dummy;
|
||||
u32 cnt, num;
|
||||
u8 *indexp;
|
||||
__be32 *p = (__be32 *)pdev->area, *indicesp;
|
||||
struct nfs4_file_layout_dsaddr *dsaddr;
|
||||
|
||||
/* Get the stripe count (number of stripe index) */
|
||||
cnt = be32_to_cpup(p++);
|
||||
dprintk("%s stripe count %d\n", __func__, cnt);
|
||||
if (cnt > NFS4_PNFS_MAX_STRIPE_CNT) {
|
||||
printk(KERN_WARNING "%s: stripe count %d greater than "
|
||||
"supported maximum %d\n", __func__,
|
||||
cnt, NFS4_PNFS_MAX_STRIPE_CNT);
|
||||
goto out_err;
|
||||
}
|
||||
|
||||
/* Check the multipath list count */
|
||||
indicesp = p;
|
||||
p += XDR_QUADLEN(cnt << 2);
|
||||
num = be32_to_cpup(p++);
|
||||
dprintk("%s ds_num %u\n", __func__, num);
|
||||
if (num > NFS4_PNFS_MAX_MULTI_CNT) {
|
||||
printk(KERN_WARNING "%s: multipath count %d greater than "
|
||||
"supported maximum %d\n", __func__,
|
||||
num, NFS4_PNFS_MAX_MULTI_CNT);
|
||||
goto out_err;
|
||||
}
|
||||
dsaddr = kzalloc(sizeof(*dsaddr) +
|
||||
(sizeof(struct nfs4_pnfs_ds *) * (num - 1)),
|
||||
GFP_KERNEL);
|
||||
if (!dsaddr)
|
||||
goto out_err;
|
||||
|
||||
dsaddr->stripe_indices = kzalloc(sizeof(u8) * cnt, GFP_KERNEL);
|
||||
if (!dsaddr->stripe_indices)
|
||||
goto out_err_free;
|
||||
|
||||
dsaddr->stripe_count = cnt;
|
||||
dsaddr->ds_num = num;
|
||||
|
||||
memcpy(&dsaddr->deviceid.de_id, &pdev->dev_id, sizeof(pdev->dev_id));
|
||||
|
||||
/* Go back an read stripe indices */
|
||||
p = indicesp;
|
||||
indexp = &dsaddr->stripe_indices[0];
|
||||
for (i = 0; i < dsaddr->stripe_count; i++) {
|
||||
*indexp = be32_to_cpup(p++);
|
||||
if (*indexp >= num)
|
||||
goto out_err_free;
|
||||
indexp++;
|
||||
}
|
||||
/* Skip already read multipath list count */
|
||||
p++;
|
||||
|
||||
for (i = 0; i < dsaddr->ds_num; i++) {
|
||||
int j;
|
||||
|
||||
dummy = be32_to_cpup(p++); /* multipath count */
|
||||
if (dummy > 1) {
|
||||
printk(KERN_WARNING
|
||||
"%s: Multipath count %d not supported, "
|
||||
"skipping all greater than 1\n", __func__,
|
||||
dummy);
|
||||
}
|
||||
for (j = 0; j < dummy; j++) {
|
||||
if (j == 0) {
|
||||
dsaddr->ds_list[i] = decode_and_add_ds(&p, ino);
|
||||
if (dsaddr->ds_list[i] == NULL)
|
||||
goto out_err_free;
|
||||
} else {
|
||||
u32 len;
|
||||
/* skip extra multipath */
|
||||
len = be32_to_cpup(p++);
|
||||
p += XDR_QUADLEN(len);
|
||||
len = be32_to_cpup(p++);
|
||||
p += XDR_QUADLEN(len);
|
||||
continue;
|
||||
}
|
||||
}
|
||||
}
|
||||
return dsaddr;
|
||||
|
||||
out_err_free:
|
||||
nfs4_fl_free_deviceid(dsaddr);
|
||||
out_err:
|
||||
dprintk("%s ERROR: returning NULL\n", __func__);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/*
|
||||
* Decode the opaque device specified in 'dev'
|
||||
* and add it to the list of available devices.
|
||||
* If the deviceid is already cached, nfs4_add_deviceid will return
|
||||
* a pointer to the cached struct and throw away the new.
|
||||
*/
|
||||
static struct nfs4_file_layout_dsaddr*
|
||||
decode_and_add_device(struct inode *inode, struct pnfs_device *dev)
|
||||
{
|
||||
struct nfs4_file_layout_dsaddr *dsaddr;
|
||||
struct pnfs_deviceid_node *d;
|
||||
|
||||
dsaddr = decode_device(inode, dev);
|
||||
if (!dsaddr) {
|
||||
printk(KERN_WARNING "%s: Could not decode or add device\n",
|
||||
__func__);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
d = pnfs_add_deviceid(NFS_SERVER(inode)->nfs_client->cl_devid_cache,
|
||||
&dsaddr->deviceid);
|
||||
|
||||
return container_of(d, struct nfs4_file_layout_dsaddr, deviceid);
|
||||
}
|
||||
|
||||
/*
|
||||
* Retrieve the information for dev_id, add it to the list
|
||||
* of available devices, and return it.
|
||||
*/
|
||||
struct nfs4_file_layout_dsaddr *
|
||||
get_device_info(struct inode *inode, struct nfs4_deviceid *dev_id)
|
||||
{
|
||||
struct pnfs_device *pdev = NULL;
|
||||
u32 max_resp_sz;
|
||||
int max_pages;
|
||||
struct page **pages = NULL;
|
||||
struct nfs4_file_layout_dsaddr *dsaddr = NULL;
|
||||
int rc, i;
|
||||
struct nfs_server *server = NFS_SERVER(inode);
|
||||
|
||||
/*
|
||||
* Use the session max response size as the basis for setting
|
||||
* GETDEVICEINFO's maxcount
|
||||
*/
|
||||
max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
|
||||
max_pages = max_resp_sz >> PAGE_SHIFT;
|
||||
dprintk("%s inode %p max_resp_sz %u max_pages %d\n",
|
||||
__func__, inode, max_resp_sz, max_pages);
|
||||
|
||||
pdev = kzalloc(sizeof(struct pnfs_device), GFP_KERNEL);
|
||||
if (pdev == NULL)
|
||||
return NULL;
|
||||
|
||||
pages = kzalloc(max_pages * sizeof(struct page *), GFP_KERNEL);
|
||||
if (pages == NULL) {
|
||||
kfree(pdev);
|
||||
return NULL;
|
||||
}
|
||||
for (i = 0; i < max_pages; i++) {
|
||||
pages[i] = alloc_page(GFP_KERNEL);
|
||||
if (!pages[i])
|
||||
goto out_free;
|
||||
}
|
||||
|
||||
/* set pdev->area */
|
||||
pdev->area = vmap(pages, max_pages, VM_MAP, PAGE_KERNEL);
|
||||
if (!pdev->area)
|
||||
goto out_free;
|
||||
|
||||
memcpy(&pdev->dev_id, dev_id, sizeof(*dev_id));
|
||||
pdev->layout_type = LAYOUT_NFSV4_1_FILES;
|
||||
pdev->pages = pages;
|
||||
pdev->pgbase = 0;
|
||||
pdev->pglen = PAGE_SIZE * max_pages;
|
||||
pdev->mincount = 0;
|
||||
|
||||
rc = nfs4_proc_getdeviceinfo(server, pdev);
|
||||
dprintk("%s getdevice info returns %d\n", __func__, rc);
|
||||
if (rc)
|
||||
goto out_free;
|
||||
|
||||
/*
|
||||
* Found new device, need to decode it and then add it to the
|
||||
* list of known devices for this mountpoint.
|
||||
*/
|
||||
dsaddr = decode_and_add_device(inode, pdev);
|
||||
out_free:
|
||||
if (pdev->area != NULL)
|
||||
vunmap(pdev->area);
|
||||
for (i = 0; i < max_pages; i++)
|
||||
__free_page(pages[i]);
|
||||
kfree(pages);
|
||||
kfree(pdev);
|
||||
dprintk("<-- %s dsaddr %p\n", __func__, dsaddr);
|
||||
return dsaddr;
|
||||
}
|
||||
|
||||
struct nfs4_file_layout_dsaddr *
|
||||
nfs4_fl_find_get_deviceid(struct nfs_client *clp, struct nfs4_deviceid *id)
|
||||
{
|
||||
struct pnfs_deviceid_node *d;
|
||||
|
||||
d = pnfs_find_get_deviceid(clp->cl_devid_cache, id);
|
||||
return (d == NULL) ? NULL :
|
||||
container_of(d, struct nfs4_file_layout_dsaddr, deviceid);
|
||||
}
|
||||
Loading…
Reference in New Issue