![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>
429 lines
13 KiB
C
429 lines
13 KiB
C
/*
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* pNFS client 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_PNFS_H
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#define FS_NFS_PNFS_H
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#include <linux/nfs_fs.h>
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#include <linux/nfs_page.h>
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enum {
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NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */
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NFS_LSEG_ROC, /* roc bit received from server */
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};
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struct pnfs_layout_segment {
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struct list_head pls_list;
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struct pnfs_layout_range pls_range;
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atomic_t pls_refcount;
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unsigned long pls_flags;
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struct pnfs_layout_hdr *pls_layout;
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struct rpc_cred *pls_lc_cred; /* LAYOUTCOMMIT credential */
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loff_t pls_end_pos; /* LAYOUTCOMMIT write end */
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};
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enum pnfs_try_status {
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PNFS_ATTEMPTED = 0,
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PNFS_NOT_ATTEMPTED = 1,
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};
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#ifdef CONFIG_NFS_V4_1
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#define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4"
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enum {
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NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */
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NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */
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NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */
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NFS_LAYOUT_ROC, /* some lseg had roc bit set */
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NFS_LAYOUT_DESTROYED, /* no new use of layout allowed */
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};
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enum layoutdriver_policy_flags {
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/* Should the pNFS client commit and return the layout upon a setattr */
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PNFS_LAYOUTRET_ON_SETATTR = 1 << 0,
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};
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struct nfs4_deviceid_node;
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/* Per-layout driver specific registration structure */
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struct pnfs_layoutdriver_type {
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struct list_head pnfs_tblid;
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const u32 id;
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const char *name;
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struct module *owner;
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unsigned flags;
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struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags);
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void (*free_layout_hdr) (struct pnfs_layout_hdr *);
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struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags);
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void (*free_lseg) (struct pnfs_layout_segment *lseg);
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/* test for nfs page cache coalescing */
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const struct nfs_pageio_ops *pg_read_ops;
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const struct nfs_pageio_ops *pg_write_ops;
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/* Returns true if layoutdriver wants to divert this request to
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* driver's commit routine.
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*/
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bool (*mark_pnfs_commit)(struct pnfs_layout_segment *lseg);
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struct list_head * (*choose_commit_list) (struct nfs_page *req);
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int (*commit_pagelist)(struct inode *inode, struct list_head *mds_pages, int how);
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/*
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* Return PNFS_ATTEMPTED to indicate the layout code has attempted
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* I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS
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*/
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enum pnfs_try_status (*read_pagelist) (struct nfs_read_data *nfs_data);
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enum pnfs_try_status (*write_pagelist) (struct nfs_write_data *nfs_data, int how);
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void (*free_deviceid_node) (struct nfs4_deviceid_node *);
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void (*encode_layoutreturn) (struct pnfs_layout_hdr *layoutid,
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struct xdr_stream *xdr,
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const struct nfs4_layoutreturn_args *args);
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void (*encode_layoutcommit) (struct pnfs_layout_hdr *layoutid,
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struct xdr_stream *xdr,
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const struct nfs4_layoutcommit_args *args);
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};
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struct pnfs_layout_hdr {
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atomic_t plh_refcount;
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struct list_head plh_layouts; /* other client layouts */
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struct list_head plh_bulk_recall; /* clnt list of bulk recalls */
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struct list_head plh_segs; /* layout segments list */
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nfs4_stateid plh_stateid;
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atomic_t plh_outstanding; /* number of RPCs out */
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unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */
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u32 plh_barrier; /* ignore lower seqids */
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unsigned long plh_flags;
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struct inode *plh_inode;
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};
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struct pnfs_device {
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struct nfs4_deviceid dev_id;
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unsigned int layout_type;
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unsigned int mincount;
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struct page **pages;
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unsigned int pgbase;
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unsigned int pglen;
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};
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extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *);
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extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *);
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/* nfs4proc.c */
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extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
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struct pnfs_device *dev);
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extern int nfs4_proc_layoutget(struct nfs4_layoutget *lgp);
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extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp);
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/* pnfs.c */
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void get_layout_hdr(struct pnfs_layout_hdr *lo);
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void put_lseg(struct pnfs_layout_segment *lseg);
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bool pnfs_pageio_init_read(struct nfs_pageio_descriptor *, struct inode *);
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bool pnfs_pageio_init_write(struct nfs_pageio_descriptor *, struct inode *, int);
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void set_pnfs_layoutdriver(struct nfs_server *, u32 id);
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void unset_pnfs_layoutdriver(struct nfs_server *);
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enum pnfs_try_status pnfs_try_to_write_data(struct nfs_write_data *,
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const struct rpc_call_ops *, int);
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enum pnfs_try_status pnfs_try_to_read_data(struct nfs_read_data *,
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const struct rpc_call_ops *);
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void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
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void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *, struct nfs_page *);
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bool pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, struct nfs_page *req);
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int pnfs_layout_process(struct nfs4_layoutget *lgp);
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void pnfs_free_lseg_list(struct list_head *tmp_list);
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void pnfs_destroy_layout(struct nfs_inode *);
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void pnfs_destroy_all_layouts(struct nfs_client *);
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void put_layout_hdr(struct pnfs_layout_hdr *lo);
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void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo,
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const nfs4_stateid *new,
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bool update_barrier);
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int pnfs_choose_layoutget_stateid(nfs4_stateid *dst,
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struct pnfs_layout_hdr *lo,
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struct nfs4_state *open_state);
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int 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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bool pnfs_roc(struct inode *ino);
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void pnfs_roc_release(struct inode *ino);
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void pnfs_roc_set_barrier(struct inode *ino, u32 barrier);
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bool pnfs_roc_drain(struct inode *ino, u32 *barrier);
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void pnfs_set_layoutcommit(struct nfs_write_data *wdata);
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int pnfs_layoutcommit_inode(struct inode *inode, bool sync);
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int _pnfs_return_layout(struct inode *);
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int pnfs_ld_write_done(struct nfs_write_data *);
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int pnfs_ld_read_done(struct nfs_read_data *);
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struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
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struct nfs_open_context *ctx,
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loff_t pos,
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u64 count,
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enum pnfs_iomode iomode,
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gfp_t gfp_flags);
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void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp);
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/* nfs4_deviceid_flags */
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enum {
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NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */
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};
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/* pnfs_dev.c */
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struct nfs4_deviceid_node {
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struct hlist_node node;
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struct hlist_node tmpnode;
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const struct pnfs_layoutdriver_type *ld;
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const struct nfs_client *nfs_client;
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unsigned long flags;
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struct nfs4_deviceid deviceid;
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atomic_t ref;
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};
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void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id);
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struct nfs4_deviceid_node *nfs4_find_get_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
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void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
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void nfs4_init_deviceid_node(struct nfs4_deviceid_node *,
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const struct pnfs_layoutdriver_type *,
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const struct nfs_client *,
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const struct nfs4_deviceid *);
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struct nfs4_deviceid_node *nfs4_insert_deviceid_node(struct nfs4_deviceid_node *);
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bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *);
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void nfs4_deviceid_purge_client(const struct nfs_client *);
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static inline int lo_fail_bit(u32 iomode)
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{
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return iomode == IOMODE_RW ?
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NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED;
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}
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static inline struct pnfs_layout_segment *
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get_lseg(struct pnfs_layout_segment *lseg)
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{
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if (lseg) {
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atomic_inc(&lseg->pls_refcount);
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smp_mb__after_atomic_inc();
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}
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return lseg;
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}
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/* Return true if a layout driver is being used for this mountpoint */
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static inline int pnfs_enabled_sb(struct nfs_server *nfss)
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{
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return nfss->pnfs_curr_ld != NULL;
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}
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static inline void
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pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg)
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{
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if (lseg) {
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struct pnfs_layoutdriver_type *ld;
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ld = NFS_SERVER(req->wb_page->mapping->host)->pnfs_curr_ld;
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if (ld->mark_pnfs_commit && ld->mark_pnfs_commit(lseg)) {
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set_bit(PG_PNFS_COMMIT, &req->wb_flags);
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req->wb_commit_lseg = get_lseg(lseg);
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}
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}
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}
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static inline int
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pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how)
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{
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if (!test_and_clear_bit(NFS_INO_PNFS_COMMIT, &NFS_I(inode)->flags))
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return PNFS_NOT_ATTEMPTED;
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return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how);
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}
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static inline struct list_head *
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pnfs_choose_commit_list(struct nfs_page *req, struct list_head *mds)
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{
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struct list_head *rv;
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if (test_and_clear_bit(PG_PNFS_COMMIT, &req->wb_flags)) {
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struct inode *inode = req->wb_commit_lseg->pls_layout->plh_inode;
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set_bit(NFS_INO_PNFS_COMMIT, &NFS_I(inode)->flags);
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rv = NFS_SERVER(inode)->pnfs_curr_ld->choose_commit_list(req);
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/* matched by ref taken when PG_PNFS_COMMIT is set */
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put_lseg(req->wb_commit_lseg);
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} else
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rv = mds;
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return rv;
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}
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static inline void pnfs_clear_request_commit(struct nfs_page *req)
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{
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if (test_and_clear_bit(PG_PNFS_COMMIT, &req->wb_flags))
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put_lseg(req->wb_commit_lseg);
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}
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/* Should the pNFS client commit and return the layout upon a setattr */
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static inline bool
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pnfs_ld_layoutret_on_setattr(struct inode *inode)
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{
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if (!pnfs_enabled_sb(NFS_SERVER(inode)))
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return false;
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return NFS_SERVER(inode)->pnfs_curr_ld->flags &
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PNFS_LAYOUTRET_ON_SETATTR;
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}
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static inline int pnfs_return_layout(struct inode *ino)
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{
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struct nfs_inode *nfsi = NFS_I(ino);
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struct nfs_server *nfss = NFS_SERVER(ino);
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if (pnfs_enabled_sb(nfss) && nfsi->layout)
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return _pnfs_return_layout(ino);
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return 0;
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}
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#else /* CONFIG_NFS_V4_1 */
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static inline void pnfs_destroy_all_layouts(struct nfs_client *clp)
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{
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}
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static inline void pnfs_destroy_layout(struct nfs_inode *nfsi)
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{
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}
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static inline struct pnfs_layout_segment *
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get_lseg(struct pnfs_layout_segment *lseg)
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{
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return NULL;
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}
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static inline void put_lseg(struct pnfs_layout_segment *lseg)
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{
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}
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static inline enum pnfs_try_status
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pnfs_try_to_read_data(struct nfs_read_data *data,
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const struct rpc_call_ops *call_ops)
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{
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return PNFS_NOT_ATTEMPTED;
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}
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static inline enum pnfs_try_status
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pnfs_try_to_write_data(struct nfs_write_data *data,
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const struct rpc_call_ops *call_ops, int how)
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{
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return PNFS_NOT_ATTEMPTED;
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}
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static inline int pnfs_return_layout(struct inode *ino)
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{
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return 0;
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}
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static inline bool
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pnfs_ld_layoutret_on_setattr(struct inode *inode)
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{
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return false;
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}
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static inline bool
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pnfs_roc(struct inode *ino)
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{
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return false;
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}
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static inline void
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pnfs_roc_release(struct inode *ino)
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{
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}
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static inline void
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pnfs_roc_set_barrier(struct inode *ino, u32 barrier)
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{
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}
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static inline bool
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pnfs_roc_drain(struct inode *ino, u32 *barrier)
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{
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return false;
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}
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static inline void set_pnfs_layoutdriver(struct nfs_server *s, u32 id)
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{
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}
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static inline void unset_pnfs_layoutdriver(struct nfs_server *s)
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{
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}
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static inline bool pnfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, struct inode *inode)
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{
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return false;
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}
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static inline bool pnfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, struct inode *inode, int ioflags)
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{
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return false;
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}
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static inline void
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pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg)
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{
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}
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static inline int
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pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how)
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{
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return PNFS_NOT_ATTEMPTED;
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}
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static inline struct list_head *
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pnfs_choose_commit_list(struct nfs_page *req, struct list_head *mds)
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{
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return mds;
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}
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static inline void pnfs_clear_request_commit(struct nfs_page *req)
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{
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}
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static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync)
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{
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return 0;
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}
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static inline void nfs4_deviceid_purge_client(struct nfs_client *ncl)
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{
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}
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#endif /* CONFIG_NFS_V4_1 */
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#endif /* FS_NFS_PNFS_H */
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