![Andy Adamson](/assets/img/avatar_default.png)
Mark all deviceids established under an expired MDS clientid as invalid. Stop all new i/o through DS and send through the MDS. Don't use any new LAYOUTGETs that use the invalid deviceid. Purge all layouts established under the expired MDS clientid. Remove the MDS clientid deviceid and data servers reference Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
1353 lines
35 KiB
C
1353 lines
35 KiB
C
/*
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* pNFS functions to call and manage layout drivers.
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*
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* Copyright (c) 2002 [year of first publication]
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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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#include <linux/nfs_fs.h>
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#include "internal.h"
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#include "pnfs.h"
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#include "iostat.h"
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#define NFSDBG_FACILITY NFSDBG_PNFS
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/* Locking:
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*
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* pnfs_spinlock:
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* protects pnfs_modules_tbl.
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*/
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static DEFINE_SPINLOCK(pnfs_spinlock);
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/*
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* pnfs_modules_tbl holds all pnfs modules
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*/
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static LIST_HEAD(pnfs_modules_tbl);
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/* Return the registered pnfs layout driver module matching given id */
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static struct pnfs_layoutdriver_type *
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find_pnfs_driver_locked(u32 id)
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{
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struct pnfs_layoutdriver_type *local;
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list_for_each_entry(local, &pnfs_modules_tbl, pnfs_tblid)
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if (local->id == id)
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goto out;
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local = NULL;
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out:
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dprintk("%s: Searching for id %u, found %p\n", __func__, id, local);
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return local;
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}
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static struct pnfs_layoutdriver_type *
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find_pnfs_driver(u32 id)
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{
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struct pnfs_layoutdriver_type *local;
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spin_lock(&pnfs_spinlock);
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local = find_pnfs_driver_locked(id);
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spin_unlock(&pnfs_spinlock);
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return local;
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}
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void
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unset_pnfs_layoutdriver(struct nfs_server *nfss)
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{
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if (nfss->pnfs_curr_ld)
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module_put(nfss->pnfs_curr_ld->owner);
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nfss->pnfs_curr_ld = NULL;
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}
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/*
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* Try to set the server's pnfs module to the pnfs layout type specified by id.
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* Currently only one pNFS layout driver per filesystem is supported.
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*
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* @id layout type. Zero (illegal layout type) indicates pNFS not in use.
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*/
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void
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set_pnfs_layoutdriver(struct nfs_server *server, u32 id)
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{
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struct pnfs_layoutdriver_type *ld_type = NULL;
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if (id == 0)
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goto out_no_driver;
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if (!(server->nfs_client->cl_exchange_flags &
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(EXCHGID4_FLAG_USE_NON_PNFS | EXCHGID4_FLAG_USE_PNFS_MDS))) {
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printk(KERN_ERR "%s: id %u cl_exchange_flags 0x%x\n", __func__,
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id, server->nfs_client->cl_exchange_flags);
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goto out_no_driver;
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}
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ld_type = find_pnfs_driver(id);
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if (!ld_type) {
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request_module("%s-%u", LAYOUT_NFSV4_1_MODULE_PREFIX, id);
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ld_type = find_pnfs_driver(id);
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if (!ld_type) {
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dprintk("%s: No pNFS module found for %u.\n",
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__func__, id);
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goto out_no_driver;
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}
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}
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if (!try_module_get(ld_type->owner)) {
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dprintk("%s: Could not grab reference on module\n", __func__);
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goto out_no_driver;
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}
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server->pnfs_curr_ld = ld_type;
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dprintk("%s: pNFS module for %u set\n", __func__, id);
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return;
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out_no_driver:
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dprintk("%s: Using NFSv4 I/O\n", __func__);
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server->pnfs_curr_ld = NULL;
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}
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int
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pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *ld_type)
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{
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int status = -EINVAL;
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struct pnfs_layoutdriver_type *tmp;
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if (ld_type->id == 0) {
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printk(KERN_ERR "%s id 0 is reserved\n", __func__);
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return status;
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}
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if (!ld_type->alloc_lseg || !ld_type->free_lseg) {
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printk(KERN_ERR "%s Layout driver must provide "
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"alloc_lseg and free_lseg.\n", __func__);
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return status;
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}
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spin_lock(&pnfs_spinlock);
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tmp = find_pnfs_driver_locked(ld_type->id);
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if (!tmp) {
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list_add(&ld_type->pnfs_tblid, &pnfs_modules_tbl);
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status = 0;
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dprintk("%s Registering id:%u name:%s\n", __func__, ld_type->id,
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ld_type->name);
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} else {
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printk(KERN_ERR "%s Module with id %d already loaded!\n",
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__func__, ld_type->id);
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}
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spin_unlock(&pnfs_spinlock);
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return status;
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}
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EXPORT_SYMBOL_GPL(pnfs_register_layoutdriver);
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void
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pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *ld_type)
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{
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dprintk("%s Deregistering id:%u\n", __func__, ld_type->id);
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spin_lock(&pnfs_spinlock);
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list_del(&ld_type->pnfs_tblid);
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spin_unlock(&pnfs_spinlock);
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}
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EXPORT_SYMBOL_GPL(pnfs_unregister_layoutdriver);
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/*
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* pNFS client layout cache
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*/
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/* Need to hold i_lock if caller does not already hold reference */
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void
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get_layout_hdr(struct pnfs_layout_hdr *lo)
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{
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atomic_inc(&lo->plh_refcount);
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}
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static struct pnfs_layout_hdr *
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pnfs_alloc_layout_hdr(struct inode *ino, gfp_t gfp_flags)
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{
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struct pnfs_layoutdriver_type *ld = NFS_SERVER(ino)->pnfs_curr_ld;
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return ld->alloc_layout_hdr ? ld->alloc_layout_hdr(ino, gfp_flags) :
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kzalloc(sizeof(struct pnfs_layout_hdr), gfp_flags);
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}
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static void
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pnfs_free_layout_hdr(struct pnfs_layout_hdr *lo)
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{
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struct pnfs_layoutdriver_type *ld = NFS_SERVER(lo->plh_inode)->pnfs_curr_ld;
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return ld->alloc_layout_hdr ? ld->free_layout_hdr(lo) : kfree(lo);
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}
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static void
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destroy_layout_hdr(struct pnfs_layout_hdr *lo)
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{
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dprintk("%s: freeing layout cache %p\n", __func__, lo);
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BUG_ON(!list_empty(&lo->plh_layouts));
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NFS_I(lo->plh_inode)->layout = NULL;
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pnfs_free_layout_hdr(lo);
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}
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static void
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put_layout_hdr_locked(struct pnfs_layout_hdr *lo)
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{
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if (atomic_dec_and_test(&lo->plh_refcount))
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destroy_layout_hdr(lo);
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}
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void
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put_layout_hdr(struct pnfs_layout_hdr *lo)
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{
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struct inode *inode = lo->plh_inode;
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if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) {
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destroy_layout_hdr(lo);
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spin_unlock(&inode->i_lock);
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}
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}
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static void
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init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg)
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{
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INIT_LIST_HEAD(&lseg->pls_list);
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atomic_set(&lseg->pls_refcount, 1);
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smp_mb();
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set_bit(NFS_LSEG_VALID, &lseg->pls_flags);
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lseg->pls_layout = lo;
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}
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static void free_lseg(struct pnfs_layout_segment *lseg)
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{
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struct inode *ino = lseg->pls_layout->plh_inode;
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NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg);
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/* Matched by get_layout_hdr in pnfs_insert_layout */
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put_layout_hdr(NFS_I(ino)->layout);
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}
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static void
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put_lseg_common(struct pnfs_layout_segment *lseg)
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{
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struct inode *inode = lseg->pls_layout->plh_inode;
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WARN_ON(test_bit(NFS_LSEG_VALID, &lseg->pls_flags));
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list_del_init(&lseg->pls_list);
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if (list_empty(&lseg->pls_layout->plh_segs)) {
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set_bit(NFS_LAYOUT_DESTROYED, &lseg->pls_layout->plh_flags);
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/* Matched by initial refcount set in alloc_init_layout_hdr */
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put_layout_hdr_locked(lseg->pls_layout);
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}
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rpc_wake_up(&NFS_SERVER(inode)->roc_rpcwaitq);
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}
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void
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put_lseg(struct pnfs_layout_segment *lseg)
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{
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struct inode *inode;
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if (!lseg)
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return;
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dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg,
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atomic_read(&lseg->pls_refcount),
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test_bit(NFS_LSEG_VALID, &lseg->pls_flags));
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inode = lseg->pls_layout->plh_inode;
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if (atomic_dec_and_lock(&lseg->pls_refcount, &inode->i_lock)) {
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LIST_HEAD(free_me);
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put_lseg_common(lseg);
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list_add(&lseg->pls_list, &free_me);
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spin_unlock(&inode->i_lock);
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pnfs_free_lseg_list(&free_me);
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}
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}
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EXPORT_SYMBOL_GPL(put_lseg);
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static inline u64
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end_offset(u64 start, u64 len)
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{
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u64 end;
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end = start + len;
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return end >= start ? end : NFS4_MAX_UINT64;
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}
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/* last octet in a range */
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static inline u64
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last_byte_offset(u64 start, u64 len)
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{
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u64 end;
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BUG_ON(!len);
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end = start + len;
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return end > start ? end - 1 : NFS4_MAX_UINT64;
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}
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/*
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* is l2 fully contained in l1?
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* start1 end1
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* [----------------------------------)
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* start2 end2
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* [----------------)
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*/
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static inline int
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lo_seg_contained(struct pnfs_layout_range *l1,
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struct pnfs_layout_range *l2)
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{
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u64 start1 = l1->offset;
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u64 end1 = end_offset(start1, l1->length);
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u64 start2 = l2->offset;
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u64 end2 = end_offset(start2, l2->length);
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return (start1 <= start2) && (end1 >= end2);
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}
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/*
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* is l1 and l2 intersecting?
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* start1 end1
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* [----------------------------------)
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* start2 end2
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* [----------------)
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*/
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static inline int
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lo_seg_intersecting(struct pnfs_layout_range *l1,
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struct pnfs_layout_range *l2)
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{
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u64 start1 = l1->offset;
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u64 end1 = end_offset(start1, l1->length);
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u64 start2 = l2->offset;
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u64 end2 = end_offset(start2, l2->length);
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return (end1 == NFS4_MAX_UINT64 || end1 > start2) &&
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(end2 == NFS4_MAX_UINT64 || end2 > start1);
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}
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static bool
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should_free_lseg(struct pnfs_layout_range *lseg_range,
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struct pnfs_layout_range *recall_range)
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{
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return (recall_range->iomode == IOMODE_ANY ||
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lseg_range->iomode == recall_range->iomode) &&
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lo_seg_intersecting(lseg_range, recall_range);
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}
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/* Returns 1 if lseg is removed from list, 0 otherwise */
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static int mark_lseg_invalid(struct pnfs_layout_segment *lseg,
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struct list_head *tmp_list)
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{
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int rv = 0;
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if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) {
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/* Remove the reference keeping the lseg in the
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* list. It will now be removed when all
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* outstanding io is finished.
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*/
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dprintk("%s: lseg %p ref %d\n", __func__, lseg,
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atomic_read(&lseg->pls_refcount));
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if (atomic_dec_and_test(&lseg->pls_refcount)) {
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put_lseg_common(lseg);
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list_add(&lseg->pls_list, tmp_list);
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rv = 1;
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}
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}
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return rv;
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}
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/* Returns count of number of matching invalid lsegs remaining in list
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* after call.
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*/
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int
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mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
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struct list_head *tmp_list,
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struct pnfs_layout_range *recall_range)
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{
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struct pnfs_layout_segment *lseg, *next;
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int invalid = 0, removed = 0;
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dprintk("%s:Begin lo %p\n", __func__, lo);
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if (list_empty(&lo->plh_segs)) {
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if (!test_and_set_bit(NFS_LAYOUT_DESTROYED, &lo->plh_flags))
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put_layout_hdr_locked(lo);
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return 0;
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}
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list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list)
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if (!recall_range ||
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should_free_lseg(&lseg->pls_range, recall_range)) {
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dprintk("%s: freeing lseg %p iomode %d "
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"offset %llu length %llu\n", __func__,
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lseg, lseg->pls_range.iomode, lseg->pls_range.offset,
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lseg->pls_range.length);
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invalid++;
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removed += mark_lseg_invalid(lseg, tmp_list);
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}
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dprintk("%s:Return %i\n", __func__, invalid - removed);
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return invalid - removed;
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}
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/* note free_me must contain lsegs from a single layout_hdr */
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void
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pnfs_free_lseg_list(struct list_head *free_me)
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{
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struct pnfs_layout_segment *lseg, *tmp;
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struct pnfs_layout_hdr *lo;
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if (list_empty(free_me))
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return;
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lo = list_first_entry(free_me, struct pnfs_layout_segment,
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pls_list)->pls_layout;
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if (test_bit(NFS_LAYOUT_DESTROYED, &lo->plh_flags)) {
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struct nfs_client *clp;
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clp = NFS_SERVER(lo->plh_inode)->nfs_client;
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spin_lock(&clp->cl_lock);
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list_del_init(&lo->plh_layouts);
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spin_unlock(&clp->cl_lock);
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}
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list_for_each_entry_safe(lseg, tmp, free_me, pls_list) {
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list_del(&lseg->pls_list);
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free_lseg(lseg);
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}
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}
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|
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void
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pnfs_destroy_layout(struct nfs_inode *nfsi)
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{
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struct pnfs_layout_hdr *lo;
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LIST_HEAD(tmp_list);
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spin_lock(&nfsi->vfs_inode.i_lock);
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lo = nfsi->layout;
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if (lo) {
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lo->plh_block_lgets++; /* permanently block new LAYOUTGETs */
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mark_matching_lsegs_invalid(lo, &tmp_list, NULL);
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}
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spin_unlock(&nfsi->vfs_inode.i_lock);
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pnfs_free_lseg_list(&tmp_list);
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}
|
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|
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/*
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* Called by the state manger to remove all layouts established under an
|
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* expired lease.
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*/
|
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void
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pnfs_destroy_all_layouts(struct nfs_client *clp)
|
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{
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struct nfs_server *server;
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struct pnfs_layout_hdr *lo;
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LIST_HEAD(tmp_list);
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nfs4_deviceid_mark_client_invalid(clp);
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nfs4_deviceid_purge_client(clp);
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spin_lock(&clp->cl_lock);
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rcu_read_lock();
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list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
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if (!list_empty(&server->layouts))
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list_splice_init(&server->layouts, &tmp_list);
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}
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rcu_read_unlock();
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spin_unlock(&clp->cl_lock);
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|
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while (!list_empty(&tmp_list)) {
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lo = list_entry(tmp_list.next, struct pnfs_layout_hdr,
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plh_layouts);
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dprintk("%s freeing layout for inode %lu\n", __func__,
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lo->plh_inode->i_ino);
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list_del_init(&lo->plh_layouts);
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pnfs_destroy_layout(NFS_I(lo->plh_inode));
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}
|
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}
|
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|
|
/* update lo->plh_stateid with new if is more recent */
|
|
void
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|
pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new,
|
|
bool update_barrier)
|
|
{
|
|
u32 oldseq, newseq;
|
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|
|
oldseq = be32_to_cpu(lo->plh_stateid.stateid.seqid);
|
|
newseq = be32_to_cpu(new->stateid.seqid);
|
|
if ((int)(newseq - oldseq) > 0) {
|
|
memcpy(&lo->plh_stateid, &new->stateid, sizeof(new->stateid));
|
|
if (update_barrier) {
|
|
u32 new_barrier = be32_to_cpu(new->stateid.seqid);
|
|
|
|
if ((int)(new_barrier - lo->plh_barrier))
|
|
lo->plh_barrier = new_barrier;
|
|
} else {
|
|
/* Because of wraparound, we want to keep the barrier
|
|
* "close" to the current seqids. It needs to be
|
|
* within 2**31 to count as "behind", so if it
|
|
* gets too near that limit, give us a litle leeway
|
|
* and bring it to within 2**30.
|
|
* NOTE - and yes, this is all unsigned arithmetic.
|
|
*/
|
|
if (unlikely((newseq - lo->plh_barrier) > (3 << 29)))
|
|
lo->plh_barrier = newseq - (1 << 30);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* lget is set to 1 if called from inside send_layoutget call chain */
|
|
static bool
|
|
pnfs_layoutgets_blocked(struct pnfs_layout_hdr *lo, nfs4_stateid *stateid,
|
|
int lget)
|
|
{
|
|
if ((stateid) &&
|
|
(int)(lo->plh_barrier - be32_to_cpu(stateid->stateid.seqid)) >= 0)
|
|
return true;
|
|
return lo->plh_block_lgets ||
|
|
test_bit(NFS_LAYOUT_DESTROYED, &lo->plh_flags) ||
|
|
test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) ||
|
|
(list_empty(&lo->plh_segs) &&
|
|
(atomic_read(&lo->plh_outstanding) > lget));
|
|
}
|
|
|
|
int
|
|
pnfs_choose_layoutget_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo,
|
|
struct nfs4_state *open_state)
|
|
{
|
|
int status = 0;
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
spin_lock(&lo->plh_inode->i_lock);
|
|
if (pnfs_layoutgets_blocked(lo, NULL, 1)) {
|
|
status = -EAGAIN;
|
|
} else if (list_empty(&lo->plh_segs)) {
|
|
int seq;
|
|
|
|
do {
|
|
seq = read_seqbegin(&open_state->seqlock);
|
|
memcpy(dst->data, open_state->stateid.data,
|
|
sizeof(open_state->stateid.data));
|
|
} while (read_seqretry(&open_state->seqlock, seq));
|
|
} else
|
|
memcpy(dst->data, lo->plh_stateid.data, sizeof(lo->plh_stateid.data));
|
|
spin_unlock(&lo->plh_inode->i_lock);
|
|
dprintk("<-- %s\n", __func__);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Get layout from server.
|
|
* for now, assume that whole file layouts are requested.
|
|
* arg->offset: 0
|
|
* arg->length: all ones
|
|
*/
|
|
static struct pnfs_layout_segment *
|
|
send_layoutget(struct pnfs_layout_hdr *lo,
|
|
struct nfs_open_context *ctx,
|
|
struct pnfs_layout_range *range,
|
|
gfp_t gfp_flags)
|
|
{
|
|
struct inode *ino = lo->plh_inode;
|
|
struct nfs_server *server = NFS_SERVER(ino);
|
|
struct nfs4_layoutget *lgp;
|
|
struct pnfs_layout_segment *lseg = NULL;
|
|
struct page **pages = NULL;
|
|
int i;
|
|
u32 max_resp_sz, max_pages;
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
|
|
BUG_ON(ctx == NULL);
|
|
lgp = kzalloc(sizeof(*lgp), gfp_flags);
|
|
if (lgp == NULL)
|
|
return NULL;
|
|
|
|
/* allocate pages for xdr post processing */
|
|
max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
|
|
max_pages = max_resp_sz >> PAGE_SHIFT;
|
|
|
|
pages = kzalloc(max_pages * sizeof(struct page *), gfp_flags);
|
|
if (!pages)
|
|
goto out_err_free;
|
|
|
|
for (i = 0; i < max_pages; i++) {
|
|
pages[i] = alloc_page(gfp_flags);
|
|
if (!pages[i])
|
|
goto out_err_free;
|
|
}
|
|
|
|
lgp->args.minlength = PAGE_CACHE_SIZE;
|
|
if (lgp->args.minlength > range->length)
|
|
lgp->args.minlength = range->length;
|
|
lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE;
|
|
lgp->args.range = *range;
|
|
lgp->args.type = server->pnfs_curr_ld->id;
|
|
lgp->args.inode = ino;
|
|
lgp->args.ctx = get_nfs_open_context(ctx);
|
|
lgp->args.layout.pages = pages;
|
|
lgp->args.layout.pglen = max_pages * PAGE_SIZE;
|
|
lgp->lsegpp = &lseg;
|
|
lgp->gfp_flags = gfp_flags;
|
|
|
|
/* Synchronously retrieve layout information from server and
|
|
* store in lseg.
|
|
*/
|
|
nfs4_proc_layoutget(lgp);
|
|
if (!lseg) {
|
|
/* remember that LAYOUTGET failed and suspend trying */
|
|
set_bit(lo_fail_bit(range->iomode), &lo->plh_flags);
|
|
}
|
|
|
|
/* free xdr pages */
|
|
for (i = 0; i < max_pages; i++)
|
|
__free_page(pages[i]);
|
|
kfree(pages);
|
|
|
|
return lseg;
|
|
|
|
out_err_free:
|
|
/* free any allocated xdr pages, lgp as it's not used */
|
|
if (pages) {
|
|
for (i = 0; i < max_pages; i++) {
|
|
if (!pages[i])
|
|
break;
|
|
__free_page(pages[i]);
|
|
}
|
|
kfree(pages);
|
|
}
|
|
kfree(lgp);
|
|
return NULL;
|
|
}
|
|
|
|
/* Initiates a LAYOUTRETURN(FILE) */
|
|
int
|
|
_pnfs_return_layout(struct inode *ino)
|
|
{
|
|
struct pnfs_layout_hdr *lo = NULL;
|
|
struct nfs_inode *nfsi = NFS_I(ino);
|
|
LIST_HEAD(tmp_list);
|
|
struct nfs4_layoutreturn *lrp;
|
|
nfs4_stateid stateid;
|
|
int status = 0;
|
|
|
|
dprintk("--> %s\n", __func__);
|
|
|
|
spin_lock(&ino->i_lock);
|
|
lo = nfsi->layout;
|
|
if (!lo) {
|
|
spin_unlock(&ino->i_lock);
|
|
dprintk("%s: no layout to return\n", __func__);
|
|
return status;
|
|
}
|
|
stateid = nfsi->layout->plh_stateid;
|
|
/* Reference matched in nfs4_layoutreturn_release */
|
|
get_layout_hdr(lo);
|
|
mark_matching_lsegs_invalid(lo, &tmp_list, NULL);
|
|
lo->plh_block_lgets++;
|
|
spin_unlock(&ino->i_lock);
|
|
pnfs_free_lseg_list(&tmp_list);
|
|
|
|
WARN_ON(test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags));
|
|
|
|
lrp = kzalloc(sizeof(*lrp), GFP_KERNEL);
|
|
if (unlikely(lrp == NULL)) {
|
|
status = -ENOMEM;
|
|
set_bit(NFS_LAYOUT_RW_FAILED, &lo->plh_flags);
|
|
set_bit(NFS_LAYOUT_RO_FAILED, &lo->plh_flags);
|
|
put_layout_hdr(lo);
|
|
goto out;
|
|
}
|
|
|
|
lrp->args.stateid = stateid;
|
|
lrp->args.layout_type = NFS_SERVER(ino)->pnfs_curr_ld->id;
|
|
lrp->args.inode = ino;
|
|
lrp->args.layout = lo;
|
|
lrp->clp = NFS_SERVER(ino)->nfs_client;
|
|
|
|
status = nfs4_proc_layoutreturn(lrp);
|
|
out:
|
|
dprintk("<-- %s status: %d\n", __func__, status);
|
|
return status;
|
|
}
|
|
|
|
bool pnfs_roc(struct inode *ino)
|
|
{
|
|
struct pnfs_layout_hdr *lo;
|
|
struct pnfs_layout_segment *lseg, *tmp;
|
|
LIST_HEAD(tmp_list);
|
|
bool found = false;
|
|
|
|
spin_lock(&ino->i_lock);
|
|
lo = NFS_I(ino)->layout;
|
|
if (!lo || !test_and_clear_bit(NFS_LAYOUT_ROC, &lo->plh_flags) ||
|
|
test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags))
|
|
goto out_nolayout;
|
|
list_for_each_entry_safe(lseg, tmp, &lo->plh_segs, pls_list)
|
|
if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) {
|
|
mark_lseg_invalid(lseg, &tmp_list);
|
|
found = true;
|
|
}
|
|
if (!found)
|
|
goto out_nolayout;
|
|
lo->plh_block_lgets++;
|
|
get_layout_hdr(lo); /* matched in pnfs_roc_release */
|
|
spin_unlock(&ino->i_lock);
|
|
pnfs_free_lseg_list(&tmp_list);
|
|
return true;
|
|
|
|
out_nolayout:
|
|
spin_unlock(&ino->i_lock);
|
|
return false;
|
|
}
|
|
|
|
void pnfs_roc_release(struct inode *ino)
|
|
{
|
|
struct pnfs_layout_hdr *lo;
|
|
|
|
spin_lock(&ino->i_lock);
|
|
lo = NFS_I(ino)->layout;
|
|
lo->plh_block_lgets--;
|
|
put_layout_hdr_locked(lo);
|
|
spin_unlock(&ino->i_lock);
|
|
}
|
|
|
|
void pnfs_roc_set_barrier(struct inode *ino, u32 barrier)
|
|
{
|
|
struct pnfs_layout_hdr *lo;
|
|
|
|
spin_lock(&ino->i_lock);
|
|
lo = NFS_I(ino)->layout;
|
|
if ((int)(barrier - lo->plh_barrier) > 0)
|
|
lo->plh_barrier = barrier;
|
|
spin_unlock(&ino->i_lock);
|
|
}
|
|
|
|
bool pnfs_roc_drain(struct inode *ino, u32 *barrier)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(ino);
|
|
struct pnfs_layout_segment *lseg;
|
|
bool found = false;
|
|
|
|
spin_lock(&ino->i_lock);
|
|
list_for_each_entry(lseg, &nfsi->layout->plh_segs, pls_list)
|
|
if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) {
|
|
found = true;
|
|
break;
|
|
}
|
|
if (!found) {
|
|
struct pnfs_layout_hdr *lo = nfsi->layout;
|
|
u32 current_seqid = be32_to_cpu(lo->plh_stateid.stateid.seqid);
|
|
|
|
/* Since close does not return a layout stateid for use as
|
|
* a barrier, we choose the worst-case barrier.
|
|
*/
|
|
*barrier = current_seqid + atomic_read(&lo->plh_outstanding);
|
|
}
|
|
spin_unlock(&ino->i_lock);
|
|
return found;
|
|
}
|
|
|
|
/*
|
|
* Compare two layout segments for sorting into layout cache.
|
|
* We want to preferentially return RW over RO layouts, so ensure those
|
|
* are seen first.
|
|
*/
|
|
static s64
|
|
cmp_layout(struct pnfs_layout_range *l1,
|
|
struct pnfs_layout_range *l2)
|
|
{
|
|
s64 d;
|
|
|
|
/* high offset > low offset */
|
|
d = l1->offset - l2->offset;
|
|
if (d)
|
|
return d;
|
|
|
|
/* short length > long length */
|
|
d = l2->length - l1->length;
|
|
if (d)
|
|
return d;
|
|
|
|
/* read > read/write */
|
|
return (int)(l1->iomode == IOMODE_READ) - (int)(l2->iomode == IOMODE_READ);
|
|
}
|
|
|
|
static void
|
|
pnfs_insert_layout(struct pnfs_layout_hdr *lo,
|
|
struct pnfs_layout_segment *lseg)
|
|
{
|
|
struct pnfs_layout_segment *lp;
|
|
|
|
dprintk("%s:Begin\n", __func__);
|
|
|
|
assert_spin_locked(&lo->plh_inode->i_lock);
|
|
list_for_each_entry(lp, &lo->plh_segs, pls_list) {
|
|
if (cmp_layout(&lseg->pls_range, &lp->pls_range) > 0)
|
|
continue;
|
|
list_add_tail(&lseg->pls_list, &lp->pls_list);
|
|
dprintk("%s: inserted lseg %p "
|
|
"iomode %d offset %llu length %llu before "
|
|
"lp %p iomode %d offset %llu length %llu\n",
|
|
__func__, lseg, lseg->pls_range.iomode,
|
|
lseg->pls_range.offset, lseg->pls_range.length,
|
|
lp, lp->pls_range.iomode, lp->pls_range.offset,
|
|
lp->pls_range.length);
|
|
goto out;
|
|
}
|
|
list_add_tail(&lseg->pls_list, &lo->plh_segs);
|
|
dprintk("%s: inserted lseg %p "
|
|
"iomode %d offset %llu length %llu at tail\n",
|
|
__func__, lseg, lseg->pls_range.iomode,
|
|
lseg->pls_range.offset, lseg->pls_range.length);
|
|
out:
|
|
get_layout_hdr(lo);
|
|
|
|
dprintk("%s:Return\n", __func__);
|
|
}
|
|
|
|
static struct pnfs_layout_hdr *
|
|
alloc_init_layout_hdr(struct inode *ino, gfp_t gfp_flags)
|
|
{
|
|
struct pnfs_layout_hdr *lo;
|
|
|
|
lo = pnfs_alloc_layout_hdr(ino, gfp_flags);
|
|
if (!lo)
|
|
return NULL;
|
|
atomic_set(&lo->plh_refcount, 1);
|
|
INIT_LIST_HEAD(&lo->plh_layouts);
|
|
INIT_LIST_HEAD(&lo->plh_segs);
|
|
INIT_LIST_HEAD(&lo->plh_bulk_recall);
|
|
lo->plh_inode = ino;
|
|
return lo;
|
|
}
|
|
|
|
static struct pnfs_layout_hdr *
|
|
pnfs_find_alloc_layout(struct inode *ino, gfp_t gfp_flags)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(ino);
|
|
struct pnfs_layout_hdr *new = NULL;
|
|
|
|
dprintk("%s Begin ino=%p layout=%p\n", __func__, ino, nfsi->layout);
|
|
|
|
assert_spin_locked(&ino->i_lock);
|
|
if (nfsi->layout) {
|
|
if (test_bit(NFS_LAYOUT_DESTROYED, &nfsi->layout->plh_flags))
|
|
return NULL;
|
|
else
|
|
return nfsi->layout;
|
|
}
|
|
spin_unlock(&ino->i_lock);
|
|
new = alloc_init_layout_hdr(ino, gfp_flags);
|
|
spin_lock(&ino->i_lock);
|
|
|
|
if (likely(nfsi->layout == NULL)) /* Won the race? */
|
|
nfsi->layout = new;
|
|
else
|
|
pnfs_free_layout_hdr(new);
|
|
return nfsi->layout;
|
|
}
|
|
|
|
/*
|
|
* iomode matching rules:
|
|
* iomode lseg match
|
|
* ----- ----- -----
|
|
* ANY READ true
|
|
* ANY RW true
|
|
* RW READ false
|
|
* RW RW true
|
|
* READ READ true
|
|
* READ RW true
|
|
*/
|
|
static int
|
|
is_matching_lseg(struct pnfs_layout_range *ls_range,
|
|
struct pnfs_layout_range *range)
|
|
{
|
|
struct pnfs_layout_range range1;
|
|
|
|
if ((range->iomode == IOMODE_RW &&
|
|
ls_range->iomode != IOMODE_RW) ||
|
|
!lo_seg_intersecting(ls_range, range))
|
|
return 0;
|
|
|
|
/* range1 covers only the first byte in the range */
|
|
range1 = *range;
|
|
range1.length = 1;
|
|
return lo_seg_contained(ls_range, &range1);
|
|
}
|
|
|
|
/*
|
|
* lookup range in layout
|
|
*/
|
|
static struct pnfs_layout_segment *
|
|
pnfs_find_lseg(struct pnfs_layout_hdr *lo,
|
|
struct pnfs_layout_range *range)
|
|
{
|
|
struct pnfs_layout_segment *lseg, *ret = NULL;
|
|
|
|
dprintk("%s:Begin\n", __func__);
|
|
|
|
assert_spin_locked(&lo->plh_inode->i_lock);
|
|
list_for_each_entry(lseg, &lo->plh_segs, pls_list) {
|
|
if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) &&
|
|
is_matching_lseg(&lseg->pls_range, range)) {
|
|
ret = get_lseg(lseg);
|
|
break;
|
|
}
|
|
if (lseg->pls_range.offset > range->offset)
|
|
break;
|
|
}
|
|
|
|
dprintk("%s:Return lseg %p ref %d\n",
|
|
__func__, ret, ret ? atomic_read(&ret->pls_refcount) : 0);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Layout segment is retreived from the server if not cached.
|
|
* The appropriate layout segment is referenced and returned to the caller.
|
|
*/
|
|
struct pnfs_layout_segment *
|
|
pnfs_update_layout(struct inode *ino,
|
|
struct nfs_open_context *ctx,
|
|
loff_t pos,
|
|
u64 count,
|
|
enum pnfs_iomode iomode,
|
|
gfp_t gfp_flags)
|
|
{
|
|
struct pnfs_layout_range arg = {
|
|
.iomode = iomode,
|
|
.offset = pos,
|
|
.length = count,
|
|
};
|
|
unsigned pg_offset;
|
|
struct nfs_inode *nfsi = NFS_I(ino);
|
|
struct nfs_server *server = NFS_SERVER(ino);
|
|
struct nfs_client *clp = server->nfs_client;
|
|
struct pnfs_layout_hdr *lo;
|
|
struct pnfs_layout_segment *lseg = NULL;
|
|
bool first = false;
|
|
|
|
if (!pnfs_enabled_sb(NFS_SERVER(ino)))
|
|
return NULL;
|
|
spin_lock(&ino->i_lock);
|
|
lo = pnfs_find_alloc_layout(ino, gfp_flags);
|
|
if (lo == NULL) {
|
|
dprintk("%s ERROR: can't get pnfs_layout_hdr\n", __func__);
|
|
goto out_unlock;
|
|
}
|
|
|
|
/* Do we even need to bother with this? */
|
|
if (test_bit(NFS4CLNT_LAYOUTRECALL, &clp->cl_state) ||
|
|
test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) {
|
|
dprintk("%s matches recall, use MDS\n", __func__);
|
|
goto out_unlock;
|
|
}
|
|
|
|
/* if LAYOUTGET already failed once we don't try again */
|
|
if (test_bit(lo_fail_bit(iomode), &nfsi->layout->plh_flags))
|
|
goto out_unlock;
|
|
|
|
/* Check to see if the layout for the given range already exists */
|
|
lseg = pnfs_find_lseg(lo, &arg);
|
|
if (lseg)
|
|
goto out_unlock;
|
|
|
|
if (pnfs_layoutgets_blocked(lo, NULL, 0))
|
|
goto out_unlock;
|
|
atomic_inc(&lo->plh_outstanding);
|
|
|
|
get_layout_hdr(lo);
|
|
if (list_empty(&lo->plh_segs))
|
|
first = true;
|
|
spin_unlock(&ino->i_lock);
|
|
if (first) {
|
|
/* The lo must be on the clp list if there is any
|
|
* chance of a CB_LAYOUTRECALL(FILE) coming in.
|
|
*/
|
|
spin_lock(&clp->cl_lock);
|
|
BUG_ON(!list_empty(&lo->plh_layouts));
|
|
list_add_tail(&lo->plh_layouts, &server->layouts);
|
|
spin_unlock(&clp->cl_lock);
|
|
}
|
|
|
|
pg_offset = arg.offset & ~PAGE_CACHE_MASK;
|
|
if (pg_offset) {
|
|
arg.offset -= pg_offset;
|
|
arg.length += pg_offset;
|
|
}
|
|
if (arg.length != NFS4_MAX_UINT64)
|
|
arg.length = PAGE_CACHE_ALIGN(arg.length);
|
|
|
|
lseg = send_layoutget(lo, ctx, &arg, gfp_flags);
|
|
if (!lseg && first) {
|
|
spin_lock(&clp->cl_lock);
|
|
list_del_init(&lo->plh_layouts);
|
|
spin_unlock(&clp->cl_lock);
|
|
}
|
|
atomic_dec(&lo->plh_outstanding);
|
|
put_layout_hdr(lo);
|
|
out:
|
|
dprintk("%s end, state 0x%lx lseg %p\n", __func__,
|
|
nfsi->layout ? nfsi->layout->plh_flags : -1, lseg);
|
|
return lseg;
|
|
out_unlock:
|
|
spin_unlock(&ino->i_lock);
|
|
goto out;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pnfs_update_layout);
|
|
|
|
int
|
|
pnfs_layout_process(struct nfs4_layoutget *lgp)
|
|
{
|
|
struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout;
|
|
struct nfs4_layoutget_res *res = &lgp->res;
|
|
struct pnfs_layout_segment *lseg;
|
|
struct inode *ino = lo->plh_inode;
|
|
struct nfs_client *clp = NFS_SERVER(ino)->nfs_client;
|
|
int status = 0;
|
|
|
|
/* Inject layout blob into I/O device driver */
|
|
lseg = NFS_SERVER(ino)->pnfs_curr_ld->alloc_lseg(lo, res, lgp->gfp_flags);
|
|
if (!lseg || IS_ERR(lseg)) {
|
|
if (!lseg)
|
|
status = -ENOMEM;
|
|
else
|
|
status = PTR_ERR(lseg);
|
|
dprintk("%s: Could not allocate layout: error %d\n",
|
|
__func__, status);
|
|
goto out;
|
|
}
|
|
|
|
spin_lock(&ino->i_lock);
|
|
if (test_bit(NFS4CLNT_LAYOUTRECALL, &clp->cl_state) ||
|
|
test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) {
|
|
dprintk("%s forget reply due to recall\n", __func__);
|
|
goto out_forget_reply;
|
|
}
|
|
|
|
if (pnfs_layoutgets_blocked(lo, &res->stateid, 1)) {
|
|
dprintk("%s forget reply due to state\n", __func__);
|
|
goto out_forget_reply;
|
|
}
|
|
init_lseg(lo, lseg);
|
|
lseg->pls_range = res->range;
|
|
*lgp->lsegpp = get_lseg(lseg);
|
|
pnfs_insert_layout(lo, lseg);
|
|
|
|
if (res->return_on_close) {
|
|
set_bit(NFS_LSEG_ROC, &lseg->pls_flags);
|
|
set_bit(NFS_LAYOUT_ROC, &lo->plh_flags);
|
|
}
|
|
|
|
/* Done processing layoutget. Set the layout stateid */
|
|
pnfs_set_layout_stateid(lo, &res->stateid, false);
|
|
spin_unlock(&ino->i_lock);
|
|
out:
|
|
return status;
|
|
|
|
out_forget_reply:
|
|
spin_unlock(&ino->i_lock);
|
|
lseg->pls_layout = lo;
|
|
NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg);
|
|
goto out;
|
|
}
|
|
|
|
void
|
|
pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req)
|
|
{
|
|
BUG_ON(pgio->pg_lseg != NULL);
|
|
|
|
pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
|
|
req->wb_context,
|
|
req_offset(req),
|
|
req->wb_bytes,
|
|
IOMODE_READ,
|
|
GFP_KERNEL);
|
|
/* If no lseg, fall back to read through mds */
|
|
if (pgio->pg_lseg == NULL)
|
|
nfs_pageio_init_read_mds(pgio, pgio->pg_inode);
|
|
|
|
}
|
|
EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_read);
|
|
|
|
void
|
|
pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, struct nfs_page *req)
|
|
{
|
|
BUG_ON(pgio->pg_lseg != NULL);
|
|
|
|
pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
|
|
req->wb_context,
|
|
req_offset(req),
|
|
req->wb_bytes,
|
|
IOMODE_RW,
|
|
GFP_NOFS);
|
|
/* If no lseg, fall back to write through mds */
|
|
if (pgio->pg_lseg == NULL)
|
|
nfs_pageio_init_write_mds(pgio, pgio->pg_inode, pgio->pg_ioflags);
|
|
}
|
|
EXPORT_SYMBOL_GPL(pnfs_generic_pg_init_write);
|
|
|
|
bool
|
|
pnfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, struct inode *inode)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld;
|
|
|
|
if (ld == NULL)
|
|
return false;
|
|
nfs_pageio_init(pgio, inode, ld->pg_read_ops, server->rsize, 0);
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
pnfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, struct inode *inode, int ioflags)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld;
|
|
|
|
if (ld == NULL)
|
|
return false;
|
|
nfs_pageio_init(pgio, inode, ld->pg_write_ops, server->wsize, ioflags);
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev,
|
|
struct nfs_page *req)
|
|
{
|
|
if (pgio->pg_lseg == NULL)
|
|
return nfs_generic_pg_test(pgio, prev, req);
|
|
|
|
/*
|
|
* Test if a nfs_page is fully contained in the pnfs_layout_range.
|
|
* Note that this test makes several assumptions:
|
|
* - that the previous nfs_page in the struct nfs_pageio_descriptor
|
|
* is known to lie within the range.
|
|
* - that the nfs_page being tested is known to be contiguous with the
|
|
* previous nfs_page.
|
|
* - Layout ranges are page aligned, so we only have to test the
|
|
* start offset of the request.
|
|
*
|
|
* Please also note that 'end_offset' is actually the offset of the
|
|
* first byte that lies outside the pnfs_layout_range. FIXME?
|
|
*
|
|
*/
|
|
return req_offset(req) < end_offset(pgio->pg_lseg->pls_range.offset,
|
|
pgio->pg_lseg->pls_range.length);
|
|
}
|
|
EXPORT_SYMBOL_GPL(pnfs_generic_pg_test);
|
|
|
|
/*
|
|
* Called by non rpc-based layout drivers
|
|
*/
|
|
int
|
|
pnfs_ld_write_done(struct nfs_write_data *data)
|
|
{
|
|
int status;
|
|
|
|
if (!data->pnfs_error) {
|
|
pnfs_set_layoutcommit(data);
|
|
data->mds_ops->rpc_call_done(&data->task, data);
|
|
data->mds_ops->rpc_release(data);
|
|
return 0;
|
|
}
|
|
|
|
dprintk("%s: pnfs_error=%d, retry via MDS\n", __func__,
|
|
data->pnfs_error);
|
|
status = nfs_initiate_write(data, NFS_CLIENT(data->inode),
|
|
data->mds_ops, NFS_FILE_SYNC);
|
|
return status ? : -EAGAIN;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pnfs_ld_write_done);
|
|
|
|
enum pnfs_try_status
|
|
pnfs_try_to_write_data(struct nfs_write_data *wdata,
|
|
const struct rpc_call_ops *call_ops, int how)
|
|
{
|
|
struct inode *inode = wdata->inode;
|
|
enum pnfs_try_status trypnfs;
|
|
struct nfs_server *nfss = NFS_SERVER(inode);
|
|
|
|
wdata->mds_ops = call_ops;
|
|
|
|
dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__,
|
|
inode->i_ino, wdata->args.count, wdata->args.offset, how);
|
|
|
|
trypnfs = nfss->pnfs_curr_ld->write_pagelist(wdata, how);
|
|
if (trypnfs == PNFS_NOT_ATTEMPTED) {
|
|
put_lseg(wdata->lseg);
|
|
wdata->lseg = NULL;
|
|
} else
|
|
nfs_inc_stats(inode, NFSIOS_PNFS_WRITE);
|
|
|
|
dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs);
|
|
return trypnfs;
|
|
}
|
|
|
|
/*
|
|
* Called by non rpc-based layout drivers
|
|
*/
|
|
int
|
|
pnfs_ld_read_done(struct nfs_read_data *data)
|
|
{
|
|
int status;
|
|
|
|
if (!data->pnfs_error) {
|
|
__nfs4_read_done_cb(data);
|
|
data->mds_ops->rpc_call_done(&data->task, data);
|
|
data->mds_ops->rpc_release(data);
|
|
return 0;
|
|
}
|
|
|
|
dprintk("%s: pnfs_error=%d, retry via MDS\n", __func__,
|
|
data->pnfs_error);
|
|
status = nfs_initiate_read(data, NFS_CLIENT(data->inode),
|
|
data->mds_ops);
|
|
return status ? : -EAGAIN;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pnfs_ld_read_done);
|
|
|
|
/*
|
|
* Call the appropriate parallel I/O subsystem read function.
|
|
*/
|
|
enum pnfs_try_status
|
|
pnfs_try_to_read_data(struct nfs_read_data *rdata,
|
|
const struct rpc_call_ops *call_ops)
|
|
{
|
|
struct inode *inode = rdata->inode;
|
|
struct nfs_server *nfss = NFS_SERVER(inode);
|
|
enum pnfs_try_status trypnfs;
|
|
|
|
rdata->mds_ops = call_ops;
|
|
|
|
dprintk("%s: Reading ino:%lu %u@%llu\n",
|
|
__func__, inode->i_ino, rdata->args.count, rdata->args.offset);
|
|
|
|
trypnfs = nfss->pnfs_curr_ld->read_pagelist(rdata);
|
|
if (trypnfs == PNFS_NOT_ATTEMPTED) {
|
|
put_lseg(rdata->lseg);
|
|
rdata->lseg = NULL;
|
|
} else {
|
|
nfs_inc_stats(inode, NFSIOS_PNFS_READ);
|
|
}
|
|
dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs);
|
|
return trypnfs;
|
|
}
|
|
|
|
/*
|
|
* Currently there is only one (whole file) write lseg.
|
|
*/
|
|
static struct pnfs_layout_segment *pnfs_list_write_lseg(struct inode *inode)
|
|
{
|
|
struct pnfs_layout_segment *lseg, *rv = NULL;
|
|
|
|
list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list)
|
|
if (lseg->pls_range.iomode == IOMODE_RW)
|
|
rv = lseg;
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
pnfs_set_layoutcommit(struct nfs_write_data *wdata)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(wdata->inode);
|
|
loff_t end_pos = wdata->mds_offset + wdata->res.count;
|
|
bool mark_as_dirty = false;
|
|
|
|
spin_lock(&nfsi->vfs_inode.i_lock);
|
|
if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) {
|
|
/* references matched in nfs4_layoutcommit_release */
|
|
get_lseg(wdata->lseg);
|
|
wdata->lseg->pls_lc_cred =
|
|
get_rpccred(wdata->args.context->state->owner->so_cred);
|
|
mark_as_dirty = true;
|
|
dprintk("%s: Set layoutcommit for inode %lu ",
|
|
__func__, wdata->inode->i_ino);
|
|
}
|
|
if (end_pos > wdata->lseg->pls_end_pos)
|
|
wdata->lseg->pls_end_pos = end_pos;
|
|
spin_unlock(&nfsi->vfs_inode.i_lock);
|
|
|
|
/* if pnfs_layoutcommit_inode() runs between inode locks, the next one
|
|
* will be a noop because NFS_INO_LAYOUTCOMMIT will not be set */
|
|
if (mark_as_dirty)
|
|
mark_inode_dirty_sync(wdata->inode);
|
|
}
|
|
EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit);
|
|
|
|
/*
|
|
* For the LAYOUT4_NFSV4_1_FILES layout type, NFS_DATA_SYNC WRITEs and
|
|
* NFS_UNSTABLE WRITEs with a COMMIT to data servers must store enough
|
|
* data to disk to allow the server to recover the data if it crashes.
|
|
* LAYOUTCOMMIT is only needed when the NFL4_UFLG_COMMIT_THRU_MDS flag
|
|
* is off, and a COMMIT is sent to a data server, or
|
|
* if WRITEs to a data server return NFS_DATA_SYNC.
|
|
*/
|
|
int
|
|
pnfs_layoutcommit_inode(struct inode *inode, bool sync)
|
|
{
|
|
struct nfs4_layoutcommit_data *data;
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
struct pnfs_layout_segment *lseg;
|
|
struct rpc_cred *cred;
|
|
loff_t end_pos;
|
|
int status = 0;
|
|
|
|
dprintk("--> %s inode %lu\n", __func__, inode->i_ino);
|
|
|
|
if (!test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags))
|
|
return 0;
|
|
|
|
/* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */
|
|
data = kzalloc(sizeof(*data), GFP_NOFS);
|
|
if (!data) {
|
|
mark_inode_dirty_sync(inode);
|
|
status = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
spin_lock(&inode->i_lock);
|
|
if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) {
|
|
spin_unlock(&inode->i_lock);
|
|
kfree(data);
|
|
goto out;
|
|
}
|
|
/*
|
|
* Currently only one (whole file) write lseg which is referenced
|
|
* in pnfs_set_layoutcommit and will be found.
|
|
*/
|
|
lseg = pnfs_list_write_lseg(inode);
|
|
|
|
end_pos = lseg->pls_end_pos;
|
|
cred = lseg->pls_lc_cred;
|
|
lseg->pls_end_pos = 0;
|
|
lseg->pls_lc_cred = NULL;
|
|
|
|
memcpy(&data->args.stateid.data, nfsi->layout->plh_stateid.data,
|
|
sizeof(nfsi->layout->plh_stateid.data));
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
data->args.inode = inode;
|
|
data->lseg = lseg;
|
|
data->cred = cred;
|
|
nfs_fattr_init(&data->fattr);
|
|
data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
|
|
data->res.fattr = &data->fattr;
|
|
data->args.lastbytewritten = end_pos - 1;
|
|
data->res.server = NFS_SERVER(inode);
|
|
|
|
status = nfs4_proc_layoutcommit(data, sync);
|
|
out:
|
|
dprintk("<-- %s status %d\n", __func__, status);
|
|
return status;
|
|
}
|