mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-06 06:26:40 +07:00
d30c8348a4
Strip out the call to nfs_commit_inode(), and allow that to be done by nfs_write_inode(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
1272 lines
34 KiB
C
1272 lines
34 KiB
C
/*
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* linux/fs/nfs/inode.c
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*
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* Copyright (C) 1992 Rick Sladkey
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*
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* nfs inode and superblock handling functions
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*
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* Modularised by Alan Cox <Alan.Cox@linux.org>, while hacking some
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* experimental NFS changes. Modularisation taken straight from SYS5 fs.
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*
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* Change to nfs_read_super() to permit NFS mounts to multi-homed hosts.
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* J.S.Peatfield@damtp.cam.ac.uk
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*
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/time.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/string.h>
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#include <linux/stat.h>
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#include <linux/errno.h>
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#include <linux/unistd.h>
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#include <linux/sunrpc/clnt.h>
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#include <linux/sunrpc/stats.h>
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#include <linux/sunrpc/metrics.h>
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#include <linux/nfs_fs.h>
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#include <linux/nfs_mount.h>
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#include <linux/nfs4_mount.h>
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#include <linux/lockd/bind.h>
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#include <linux/smp_lock.h>
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#include <linux/seq_file.h>
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#include <linux/mount.h>
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#include <linux/nfs_idmap.h>
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#include <linux/vfs.h>
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#include <linux/inet.h>
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#include <linux/nfs_xdr.h>
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#include <asm/system.h>
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#include <asm/uaccess.h>
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#include "nfs4_fs.h"
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#include "callback.h"
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#include "delegation.h"
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#include "iostat.h"
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#include "internal.h"
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#define NFSDBG_FACILITY NFSDBG_VFS
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#define NFS_PARANOIA 1
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static void nfs_invalidate_inode(struct inode *);
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static int nfs_update_inode(struct inode *, struct nfs_fattr *);
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static void nfs_zap_acl_cache(struct inode *);
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static struct kmem_cache * nfs_inode_cachep;
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static inline unsigned long
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nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
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{
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return nfs_fileid_to_ino_t(fattr->fileid);
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}
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int nfs_write_inode(struct inode *inode, int sync)
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{
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int ret;
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if (sync) {
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ret = filemap_fdatawait(inode->i_mapping);
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if (ret == 0)
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ret = nfs_commit_inode(inode, FLUSH_SYNC);
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} else
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ret = nfs_commit_inode(inode, 0);
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if (ret >= 0)
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return 0;
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__mark_inode_dirty(inode, I_DIRTY_DATASYNC);
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return ret;
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}
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void nfs_clear_inode(struct inode *inode)
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{
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/*
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* The following should never happen...
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*/
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BUG_ON(nfs_have_writebacks(inode));
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BUG_ON(!list_empty(&NFS_I(inode)->open_files));
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BUG_ON(atomic_read(&NFS_I(inode)->data_updates) != 0);
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nfs_zap_acl_cache(inode);
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nfs_access_zap_cache(inode);
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}
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/**
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* nfs_sync_mapping - helper to flush all mmapped dirty data to disk
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*/
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int nfs_sync_mapping(struct address_space *mapping)
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{
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int ret;
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if (mapping->nrpages == 0)
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return 0;
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unmap_mapping_range(mapping, 0, 0, 0);
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ret = filemap_write_and_wait(mapping);
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if (ret != 0)
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goto out;
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ret = nfs_wb_all(mapping->host);
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out:
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return ret;
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}
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/*
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* Invalidate the local caches
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*/
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static void nfs_zap_caches_locked(struct inode *inode)
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{
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struct nfs_inode *nfsi = NFS_I(inode);
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int mode = inode->i_mode;
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nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
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NFS_ATTRTIMEO(inode) = NFS_MINATTRTIMEO(inode);
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NFS_ATTRTIMEO_UPDATE(inode) = jiffies;
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memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
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if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
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nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
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else
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nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
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}
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void nfs_zap_caches(struct inode *inode)
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{
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spin_lock(&inode->i_lock);
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nfs_zap_caches_locked(inode);
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spin_unlock(&inode->i_lock);
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}
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void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
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{
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if (mapping->nrpages != 0) {
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spin_lock(&inode->i_lock);
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NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
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spin_unlock(&inode->i_lock);
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}
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}
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static void nfs_zap_acl_cache(struct inode *inode)
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{
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void (*clear_acl_cache)(struct inode *);
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clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
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if (clear_acl_cache != NULL)
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clear_acl_cache(inode);
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spin_lock(&inode->i_lock);
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NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
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spin_unlock(&inode->i_lock);
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}
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/*
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* Invalidate, but do not unhash, the inode.
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* NB: must be called with inode->i_lock held!
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*/
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static void nfs_invalidate_inode(struct inode *inode)
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{
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set_bit(NFS_INO_STALE, &NFS_FLAGS(inode));
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nfs_zap_caches_locked(inode);
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}
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struct nfs_find_desc {
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struct nfs_fh *fh;
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struct nfs_fattr *fattr;
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};
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/*
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* In NFSv3 we can have 64bit inode numbers. In order to support
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* this, and re-exported directories (also seen in NFSv2)
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* we are forced to allow 2 different inodes to have the same
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* i_ino.
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*/
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static int
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nfs_find_actor(struct inode *inode, void *opaque)
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{
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struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
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struct nfs_fh *fh = desc->fh;
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struct nfs_fattr *fattr = desc->fattr;
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if (NFS_FILEID(inode) != fattr->fileid)
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return 0;
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if (nfs_compare_fh(NFS_FH(inode), fh))
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return 0;
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if (is_bad_inode(inode) || NFS_STALE(inode))
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return 0;
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return 1;
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}
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static int
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nfs_init_locked(struct inode *inode, void *opaque)
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{
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struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
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struct nfs_fattr *fattr = desc->fattr;
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NFS_FILEID(inode) = fattr->fileid;
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nfs_copy_fh(NFS_FH(inode), desc->fh);
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return 0;
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}
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/* Don't use READDIRPLUS on directories that we believe are too large */
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#define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
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/*
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* This is our front-end to iget that looks up inodes by file handle
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* instead of inode number.
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*/
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struct inode *
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nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
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{
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struct nfs_find_desc desc = {
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.fh = fh,
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.fattr = fattr
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};
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struct inode *inode = ERR_PTR(-ENOENT);
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unsigned long hash;
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if ((fattr->valid & NFS_ATTR_FATTR) == 0)
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goto out_no_inode;
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if (!fattr->nlink) {
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printk("NFS: Buggy server - nlink == 0!\n");
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goto out_no_inode;
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}
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hash = nfs_fattr_to_ino_t(fattr);
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inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
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if (inode == NULL) {
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inode = ERR_PTR(-ENOMEM);
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goto out_no_inode;
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}
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if (inode->i_state & I_NEW) {
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struct nfs_inode *nfsi = NFS_I(inode);
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/* We set i_ino for the few things that still rely on it,
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* such as stat(2) */
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inode->i_ino = hash;
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/* We can't support update_atime(), since the server will reset it */
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inode->i_flags |= S_NOATIME|S_NOCMTIME;
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inode->i_mode = fattr->mode;
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/* Why so? Because we want revalidate for devices/FIFOs, and
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* that's precisely what we have in nfs_file_inode_operations.
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*/
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inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
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if (S_ISREG(inode->i_mode)) {
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inode->i_fop = &nfs_file_operations;
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inode->i_data.a_ops = &nfs_file_aops;
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inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
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} else if (S_ISDIR(inode->i_mode)) {
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inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
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inode->i_fop = &nfs_dir_operations;
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if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)
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&& fattr->size <= NFS_LIMIT_READDIRPLUS)
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set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode));
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/* Deal with crossing mountpoints */
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if (!nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) {
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if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
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inode->i_op = &nfs_referral_inode_operations;
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else
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inode->i_op = &nfs_mountpoint_inode_operations;
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inode->i_fop = NULL;
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}
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} else if (S_ISLNK(inode->i_mode))
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inode->i_op = &nfs_symlink_inode_operations;
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else
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init_special_inode(inode, inode->i_mode, fattr->rdev);
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nfsi->read_cache_jiffies = fattr->time_start;
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nfsi->last_updated = jiffies;
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inode->i_atime = fattr->atime;
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inode->i_mtime = fattr->mtime;
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inode->i_ctime = fattr->ctime;
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if (fattr->valid & NFS_ATTR_FATTR_V4)
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nfsi->change_attr = fattr->change_attr;
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inode->i_size = nfs_size_to_loff_t(fattr->size);
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inode->i_nlink = fattr->nlink;
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inode->i_uid = fattr->uid;
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inode->i_gid = fattr->gid;
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if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) {
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/*
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* report the blocks in 512byte units
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*/
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inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
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} else {
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inode->i_blocks = fattr->du.nfs2.blocks;
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}
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nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
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nfsi->attrtimeo_timestamp = jiffies;
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memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
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nfsi->access_cache = RB_ROOT;
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unlock_new_inode(inode);
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} else
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nfs_refresh_inode(inode, fattr);
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dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
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inode->i_sb->s_id,
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(long long)NFS_FILEID(inode),
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atomic_read(&inode->i_count));
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out:
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return inode;
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out_no_inode:
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dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
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goto out;
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}
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#define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET)
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int
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nfs_setattr(struct dentry *dentry, struct iattr *attr)
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{
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struct inode *inode = dentry->d_inode;
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struct nfs_fattr fattr;
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int error;
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nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
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if (attr->ia_valid & ATTR_SIZE) {
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if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode))
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attr->ia_valid &= ~ATTR_SIZE;
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}
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/* Optimization: if the end result is no change, don't RPC */
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attr->ia_valid &= NFS_VALID_ATTRS;
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if (attr->ia_valid == 0)
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return 0;
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lock_kernel();
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nfs_begin_data_update(inode);
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/* Write all dirty data */
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filemap_write_and_wait(inode->i_mapping);
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nfs_wb_all(inode);
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/*
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* Return any delegations if we're going to change ACLs
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*/
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if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
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nfs_inode_return_delegation(inode);
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error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr);
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if (error == 0)
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nfs_refresh_inode(inode, &fattr);
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nfs_end_data_update(inode);
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unlock_kernel();
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return error;
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}
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/**
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* nfs_setattr_update_inode - Update inode metadata after a setattr call.
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* @inode: pointer to struct inode
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* @attr: pointer to struct iattr
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*
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* Note: we do this in the *proc.c in order to ensure that
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* it works for things like exclusive creates too.
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*/
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void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
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{
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if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
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if ((attr->ia_valid & ATTR_MODE) != 0) {
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int mode = attr->ia_mode & S_IALLUGO;
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mode |= inode->i_mode & ~S_IALLUGO;
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inode->i_mode = mode;
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}
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if ((attr->ia_valid & ATTR_UID) != 0)
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inode->i_uid = attr->ia_uid;
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if ((attr->ia_valid & ATTR_GID) != 0)
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inode->i_gid = attr->ia_gid;
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spin_lock(&inode->i_lock);
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NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
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spin_unlock(&inode->i_lock);
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}
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if ((attr->ia_valid & ATTR_SIZE) != 0) {
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nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
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inode->i_size = attr->ia_size;
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vmtruncate(inode, attr->ia_size);
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}
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}
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static int nfs_wait_schedule(void *word)
|
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{
|
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if (signal_pending(current))
|
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return -ERESTARTSYS;
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schedule();
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return 0;
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}
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|
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/*
|
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* Wait for the inode to get unlocked.
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*/
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static int nfs_wait_on_inode(struct inode *inode)
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{
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struct rpc_clnt *clnt = NFS_CLIENT(inode);
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struct nfs_inode *nfsi = NFS_I(inode);
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sigset_t oldmask;
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int error;
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|
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rpc_clnt_sigmask(clnt, &oldmask);
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error = wait_on_bit_lock(&nfsi->flags, NFS_INO_REVALIDATING,
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nfs_wait_schedule, TASK_INTERRUPTIBLE);
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rpc_clnt_sigunmask(clnt, &oldmask);
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return error;
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}
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|
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static void nfs_wake_up_inode(struct inode *inode)
|
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{
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struct nfs_inode *nfsi = NFS_I(inode);
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|
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clear_bit(NFS_INO_REVALIDATING, &nfsi->flags);
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smp_mb__after_clear_bit();
|
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wake_up_bit(&nfsi->flags, NFS_INO_REVALIDATING);
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}
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|
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int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
|
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{
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struct inode *inode = dentry->d_inode;
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int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
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int err;
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|
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/* Flush out writes to the server in order to update c/mtime */
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nfs_sync_mapping_range(inode->i_mapping, 0, 0, FLUSH_NOCOMMIT);
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|
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/*
|
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* We may force a getattr if the user cares about atime.
|
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*
|
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* Note that we only have to check the vfsmount flags here:
|
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* - NFS always sets S_NOATIME by so checking it would give a
|
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* bogus result
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* - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
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* no point in checking those.
|
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*/
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if ((mnt->mnt_flags & MNT_NOATIME) ||
|
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((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
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need_atime = 0;
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|
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if (need_atime)
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err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
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else
|
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err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
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if (!err)
|
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generic_fillattr(inode, stat);
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return err;
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}
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|
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static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, struct dentry *dentry, struct rpc_cred *cred)
|
|
{
|
|
struct nfs_open_context *ctx;
|
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|
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ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
|
|
if (ctx != NULL) {
|
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atomic_set(&ctx->count, 1);
|
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ctx->dentry = dget(dentry);
|
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ctx->vfsmnt = mntget(mnt);
|
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ctx->cred = get_rpccred(cred);
|
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ctx->state = NULL;
|
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ctx->lockowner = current->files;
|
|
ctx->error = 0;
|
|
ctx->dir_cookie = 0;
|
|
}
|
|
return ctx;
|
|
}
|
|
|
|
struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
|
|
{
|
|
if (ctx != NULL)
|
|
atomic_inc(&ctx->count);
|
|
return ctx;
|
|
}
|
|
|
|
void put_nfs_open_context(struct nfs_open_context *ctx)
|
|
{
|
|
if (atomic_dec_and_test(&ctx->count)) {
|
|
if (!list_empty(&ctx->list)) {
|
|
struct inode *inode = ctx->dentry->d_inode;
|
|
spin_lock(&inode->i_lock);
|
|
list_del(&ctx->list);
|
|
spin_unlock(&inode->i_lock);
|
|
}
|
|
if (ctx->state != NULL)
|
|
nfs4_close_state(ctx->state, ctx->mode);
|
|
if (ctx->cred != NULL)
|
|
put_rpccred(ctx->cred);
|
|
dput(ctx->dentry);
|
|
mntput(ctx->vfsmnt);
|
|
kfree(ctx);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Ensure that mmap has a recent RPC credential for use when writing out
|
|
* shared pages
|
|
*/
|
|
static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
|
|
{
|
|
struct inode *inode = filp->f_path.dentry->d_inode;
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
|
|
filp->private_data = get_nfs_open_context(ctx);
|
|
spin_lock(&inode->i_lock);
|
|
list_add(&ctx->list, &nfsi->open_files);
|
|
spin_unlock(&inode->i_lock);
|
|
}
|
|
|
|
/*
|
|
* Given an inode, search for an open context with the desired characteristics
|
|
*/
|
|
struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
struct nfs_open_context *pos, *ctx = NULL;
|
|
|
|
spin_lock(&inode->i_lock);
|
|
list_for_each_entry(pos, &nfsi->open_files, list) {
|
|
if (cred != NULL && pos->cred != cred)
|
|
continue;
|
|
if ((pos->mode & mode) == mode) {
|
|
ctx = get_nfs_open_context(pos);
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock(&inode->i_lock);
|
|
return ctx;
|
|
}
|
|
|
|
static void nfs_file_clear_open_context(struct file *filp)
|
|
{
|
|
struct inode *inode = filp->f_path.dentry->d_inode;
|
|
struct nfs_open_context *ctx = (struct nfs_open_context *)filp->private_data;
|
|
|
|
if (ctx) {
|
|
filp->private_data = NULL;
|
|
spin_lock(&inode->i_lock);
|
|
list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
|
|
spin_unlock(&inode->i_lock);
|
|
put_nfs_open_context(ctx);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* These allocate and release file read/write context information.
|
|
*/
|
|
int nfs_open(struct inode *inode, struct file *filp)
|
|
{
|
|
struct nfs_open_context *ctx;
|
|
struct rpc_cred *cred;
|
|
|
|
cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
|
|
if (IS_ERR(cred))
|
|
return PTR_ERR(cred);
|
|
ctx = alloc_nfs_open_context(filp->f_path.mnt, filp->f_path.dentry, cred);
|
|
put_rpccred(cred);
|
|
if (ctx == NULL)
|
|
return -ENOMEM;
|
|
ctx->mode = filp->f_mode;
|
|
nfs_file_set_open_context(filp, ctx);
|
|
put_nfs_open_context(ctx);
|
|
return 0;
|
|
}
|
|
|
|
int nfs_release(struct inode *inode, struct file *filp)
|
|
{
|
|
nfs_file_clear_open_context(filp);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function is called whenever some part of NFS notices that
|
|
* the cached attributes have to be refreshed.
|
|
*/
|
|
int
|
|
__nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
|
|
{
|
|
int status = -ESTALE;
|
|
struct nfs_fattr fattr;
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
|
|
dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
|
|
inode->i_sb->s_id, (long long)NFS_FILEID(inode));
|
|
|
|
nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
|
|
lock_kernel();
|
|
if (is_bad_inode(inode))
|
|
goto out_nowait;
|
|
if (NFS_STALE(inode))
|
|
goto out_nowait;
|
|
|
|
status = nfs_wait_on_inode(inode);
|
|
if (status < 0)
|
|
goto out;
|
|
if (NFS_STALE(inode)) {
|
|
status = -ESTALE;
|
|
/* Do we trust the cached ESTALE? */
|
|
if (NFS_ATTRTIMEO(inode) != 0) {
|
|
if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME)) {
|
|
/* no */
|
|
} else
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr);
|
|
if (status != 0) {
|
|
dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
|
|
inode->i_sb->s_id,
|
|
(long long)NFS_FILEID(inode), status);
|
|
if (status == -ESTALE) {
|
|
nfs_zap_caches(inode);
|
|
if (!S_ISDIR(inode->i_mode))
|
|
set_bit(NFS_INO_STALE, &NFS_FLAGS(inode));
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
spin_lock(&inode->i_lock);
|
|
status = nfs_update_inode(inode, &fattr);
|
|
if (status) {
|
|
spin_unlock(&inode->i_lock);
|
|
dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
|
|
inode->i_sb->s_id,
|
|
(long long)NFS_FILEID(inode), status);
|
|
goto out;
|
|
}
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
|
|
nfs_zap_acl_cache(inode);
|
|
|
|
dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
|
|
inode->i_sb->s_id,
|
|
(long long)NFS_FILEID(inode));
|
|
|
|
out:
|
|
nfs_wake_up_inode(inode);
|
|
|
|
out_nowait:
|
|
unlock_kernel();
|
|
return status;
|
|
}
|
|
|
|
int nfs_attribute_timeout(struct inode *inode)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
|
|
if (nfs_have_delegation(inode, FMODE_READ))
|
|
return 0;
|
|
return time_after(jiffies, nfsi->read_cache_jiffies+nfsi->attrtimeo);
|
|
}
|
|
|
|
/**
|
|
* nfs_revalidate_inode - Revalidate the inode attributes
|
|
* @server - pointer to nfs_server struct
|
|
* @inode - pointer to inode struct
|
|
*
|
|
* Updates inode attribute information by retrieving the data from the server.
|
|
*/
|
|
int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
|
|
{
|
|
if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
|
|
&& !nfs_attribute_timeout(inode))
|
|
return NFS_STALE(inode) ? -ESTALE : 0;
|
|
return __nfs_revalidate_inode(server, inode);
|
|
}
|
|
|
|
static int nfs_invalidate_mapping_nolock(struct inode *inode, struct address_space *mapping)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
|
|
if (mapping->nrpages != 0) {
|
|
int ret = invalidate_inode_pages2(mapping);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
spin_lock(&inode->i_lock);
|
|
nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
|
|
if (S_ISDIR(inode->i_mode)) {
|
|
memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
|
|
/* This ensures we revalidate child dentries */
|
|
nfsi->cache_change_attribute = jiffies;
|
|
}
|
|
spin_unlock(&inode->i_lock);
|
|
nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
|
|
dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
|
|
inode->i_sb->s_id, (long long)NFS_FILEID(inode));
|
|
return 0;
|
|
}
|
|
|
|
static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
|
|
{
|
|
int ret = 0;
|
|
|
|
mutex_lock(&inode->i_mutex);
|
|
if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_DATA) {
|
|
ret = nfs_sync_mapping(mapping);
|
|
if (ret == 0)
|
|
ret = nfs_invalidate_mapping_nolock(inode, mapping);
|
|
}
|
|
mutex_unlock(&inode->i_mutex);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* nfs_revalidate_mapping_nolock - Revalidate the pagecache
|
|
* @inode - pointer to host inode
|
|
* @mapping - pointer to mapping
|
|
*/
|
|
int nfs_revalidate_mapping_nolock(struct inode *inode, struct address_space *mapping)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
int ret = 0;
|
|
|
|
if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
|
|
|| nfs_attribute_timeout(inode) || NFS_STALE(inode)) {
|
|
ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
|
|
if (ret < 0)
|
|
goto out;
|
|
}
|
|
if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
|
|
ret = nfs_invalidate_mapping_nolock(inode, mapping);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* nfs_revalidate_mapping - Revalidate the pagecache
|
|
* @inode - pointer to host inode
|
|
* @mapping - pointer to mapping
|
|
*
|
|
* This version of the function will take the inode->i_mutex and attempt to
|
|
* flush out all dirty data if it needs to invalidate the page cache.
|
|
*/
|
|
int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
int ret = 0;
|
|
|
|
if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
|
|
|| nfs_attribute_timeout(inode) || NFS_STALE(inode)) {
|
|
ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
|
|
if (ret < 0)
|
|
goto out;
|
|
}
|
|
if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
|
|
ret = nfs_invalidate_mapping(inode, mapping);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* nfs_begin_data_update
|
|
* @inode - pointer to inode
|
|
* Declare that a set of operations will update file data on the server
|
|
*/
|
|
void nfs_begin_data_update(struct inode *inode)
|
|
{
|
|
atomic_inc(&NFS_I(inode)->data_updates);
|
|
}
|
|
|
|
/**
|
|
* nfs_end_data_update
|
|
* @inode - pointer to inode
|
|
* Declare end of the operations that will update file data
|
|
* This will mark the inode as immediately needing revalidation
|
|
* of its attribute cache.
|
|
*/
|
|
void nfs_end_data_update(struct inode *inode)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
|
|
/* Directories: invalidate page cache */
|
|
if (S_ISDIR(inode->i_mode)) {
|
|
spin_lock(&inode->i_lock);
|
|
nfsi->cache_validity |= NFS_INO_INVALID_DATA;
|
|
spin_unlock(&inode->i_lock);
|
|
}
|
|
nfsi->cache_change_attribute = jiffies;
|
|
atomic_dec(&nfsi->data_updates);
|
|
}
|
|
|
|
static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
|
|
/* If we have atomic WCC data, we may update some attributes */
|
|
if ((fattr->valid & NFS_ATTR_WCC) != 0) {
|
|
if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) {
|
|
memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
|
|
nfsi->cache_change_attribute = jiffies;
|
|
}
|
|
if (timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
|
|
memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
|
|
nfsi->cache_change_attribute = jiffies;
|
|
}
|
|
if (inode->i_size == fattr->pre_size && nfsi->npages == 0) {
|
|
inode->i_size = fattr->size;
|
|
nfsi->cache_change_attribute = jiffies;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* nfs_check_inode_attributes - verify consistency of the inode attribute cache
|
|
* @inode - pointer to inode
|
|
* @fattr - updated attributes
|
|
*
|
|
* Verifies the attribute cache. If we have just changed the attributes,
|
|
* so that fattr carries weak cache consistency data, then it may
|
|
* also update the ctime/mtime/change_attribute.
|
|
*/
|
|
static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
loff_t cur_size, new_isize;
|
|
int data_unstable;
|
|
|
|
|
|
/* Has the inode gone and changed behind our back? */
|
|
if (nfsi->fileid != fattr->fileid
|
|
|| (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) {
|
|
return -EIO;
|
|
}
|
|
|
|
/* Are we in the process of updating data on the server? */
|
|
data_unstable = nfs_caches_unstable(inode);
|
|
|
|
/* Do atomic weak cache consistency updates */
|
|
nfs_wcc_update_inode(inode, fattr);
|
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 &&
|
|
nfsi->change_attr != fattr->change_attr)
|
|
nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
|
|
|
|
/* Verify a few of the more important attributes */
|
|
if (!timespec_equal(&inode->i_mtime, &fattr->mtime))
|
|
nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
|
|
|
|
cur_size = i_size_read(inode);
|
|
new_isize = nfs_size_to_loff_t(fattr->size);
|
|
if (cur_size != new_isize && nfsi->npages == 0)
|
|
nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
|
|
|
|
/* Have any file permissions changed? */
|
|
if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)
|
|
|| inode->i_uid != fattr->uid
|
|
|| inode->i_gid != fattr->gid)
|
|
nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
|
|
|
|
/* Has the link count changed? */
|
|
if (inode->i_nlink != fattr->nlink)
|
|
nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
|
|
|
|
if (!timespec_equal(&inode->i_atime, &fattr->atime))
|
|
nfsi->cache_validity |= NFS_INO_INVALID_ATIME;
|
|
|
|
nfsi->read_cache_jiffies = fattr->time_start;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* nfs_refresh_inode - try to update the inode attribute cache
|
|
* @inode - pointer to inode
|
|
* @fattr - updated attributes
|
|
*
|
|
* Check that an RPC call that returned attributes has not overlapped with
|
|
* other recent updates of the inode metadata, then decide whether it is
|
|
* safe to do a full update of the inode attributes, or whether just to
|
|
* call nfs_check_inode_attributes.
|
|
*/
|
|
int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
int status;
|
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR) == 0)
|
|
return 0;
|
|
spin_lock(&inode->i_lock);
|
|
if (time_after(fattr->time_start, nfsi->last_updated))
|
|
status = nfs_update_inode(inode, fattr);
|
|
else
|
|
status = nfs_check_inode_attributes(inode, fattr);
|
|
|
|
spin_unlock(&inode->i_lock);
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* nfs_post_op_update_inode - try to update the inode attribute cache
|
|
* @inode - pointer to inode
|
|
* @fattr - updated attributes
|
|
*
|
|
* After an operation that has changed the inode metadata, mark the
|
|
* attribute cache as being invalid, then try to update it.
|
|
*
|
|
* NB: if the server didn't return any post op attributes, this
|
|
* function will force the retrieval of attributes before the next
|
|
* NFS request. Thus it should be used only for operations that
|
|
* are expected to change one or more attributes, to avoid
|
|
* unnecessary NFS requests and trips through nfs_update_inode().
|
|
*/
|
|
int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
int status = 0;
|
|
|
|
spin_lock(&inode->i_lock);
|
|
if (unlikely((fattr->valid & NFS_ATTR_FATTR) == 0)) {
|
|
nfsi->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
|
|
goto out;
|
|
}
|
|
status = nfs_update_inode(inode, fattr);
|
|
out:
|
|
spin_unlock(&inode->i_lock);
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Many nfs protocol calls return the new file attributes after
|
|
* an operation. Here we update the inode to reflect the state
|
|
* of the server's inode.
|
|
*
|
|
* This is a bit tricky because we have to make sure all dirty pages
|
|
* have been sent off to the server before calling invalidate_inode_pages.
|
|
* To make sure no other process adds more write requests while we try
|
|
* our best to flush them, we make them sleep during the attribute refresh.
|
|
*
|
|
* A very similar scenario holds for the dir cache.
|
|
*/
|
|
static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
|
|
{
|
|
struct nfs_server *server;
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
loff_t cur_isize, new_isize;
|
|
unsigned int invalid = 0;
|
|
int data_stable;
|
|
|
|
dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
|
|
__FUNCTION__, inode->i_sb->s_id, inode->i_ino,
|
|
atomic_read(&inode->i_count), fattr->valid);
|
|
|
|
if (nfsi->fileid != fattr->fileid)
|
|
goto out_fileid;
|
|
|
|
/*
|
|
* Make sure the inode's type hasn't changed.
|
|
*/
|
|
if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
|
|
goto out_changed;
|
|
|
|
server = NFS_SERVER(inode);
|
|
/* Update the fsid if and only if this is the root directory */
|
|
if (inode == inode->i_sb->s_root->d_inode
|
|
&& !nfs_fsid_equal(&server->fsid, &fattr->fsid))
|
|
server->fsid = fattr->fsid;
|
|
|
|
/*
|
|
* Update the read time so we don't revalidate too often.
|
|
*/
|
|
nfsi->read_cache_jiffies = fattr->time_start;
|
|
nfsi->last_updated = jiffies;
|
|
|
|
/* Are we racing with known updates of the metadata on the server? */
|
|
data_stable = nfs_verify_change_attribute(inode, fattr->time_start);
|
|
if (data_stable)
|
|
nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_ATIME);
|
|
|
|
/* Do atomic weak cache consistency updates */
|
|
nfs_wcc_update_inode(inode, fattr);
|
|
|
|
/* Check if our cached file size is stale */
|
|
new_isize = nfs_size_to_loff_t(fattr->size);
|
|
cur_isize = i_size_read(inode);
|
|
if (new_isize != cur_isize) {
|
|
/* Do we perhaps have any outstanding writes? */
|
|
if (nfsi->npages == 0) {
|
|
/* No, but did we race with nfs_end_data_update()? */
|
|
if (data_stable) {
|
|
inode->i_size = new_isize;
|
|
invalid |= NFS_INO_INVALID_DATA;
|
|
}
|
|
invalid |= NFS_INO_INVALID_ATTR;
|
|
} else if (new_isize > cur_isize) {
|
|
inode->i_size = new_isize;
|
|
invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
|
|
}
|
|
nfsi->cache_change_attribute = jiffies;
|
|
dprintk("NFS: isize change on server for file %s/%ld\n",
|
|
inode->i_sb->s_id, inode->i_ino);
|
|
}
|
|
|
|
/* Check if the mtime agrees */
|
|
if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
|
|
memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
|
|
dprintk("NFS: mtime change on server for file %s/%ld\n",
|
|
inode->i_sb->s_id, inode->i_ino);
|
|
invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
|
|
nfsi->cache_change_attribute = jiffies;
|
|
}
|
|
|
|
/* If ctime has changed we should definitely clear access+acl caches */
|
|
if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
|
|
invalid |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
|
|
memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
|
|
nfsi->cache_change_attribute = jiffies;
|
|
}
|
|
memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
|
|
|
|
if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) ||
|
|
inode->i_uid != fattr->uid ||
|
|
inode->i_gid != fattr->gid)
|
|
invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
|
|
|
|
inode->i_mode = fattr->mode;
|
|
inode->i_nlink = fattr->nlink;
|
|
inode->i_uid = fattr->uid;
|
|
inode->i_gid = fattr->gid;
|
|
|
|
if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) {
|
|
/*
|
|
* report the blocks in 512byte units
|
|
*/
|
|
inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
|
|
} else {
|
|
inode->i_blocks = fattr->du.nfs2.blocks;
|
|
}
|
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 &&
|
|
nfsi->change_attr != fattr->change_attr) {
|
|
dprintk("NFS: change_attr change on server for file %s/%ld\n",
|
|
inode->i_sb->s_id, inode->i_ino);
|
|
nfsi->change_attr = fattr->change_attr;
|
|
invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
|
|
nfsi->cache_change_attribute = jiffies;
|
|
}
|
|
|
|
/* Update attrtimeo value if we're out of the unstable period */
|
|
if (invalid & NFS_INO_INVALID_ATTR) {
|
|
nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
|
|
nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
|
|
nfsi->attrtimeo_timestamp = jiffies;
|
|
} else if (time_after(jiffies, nfsi->attrtimeo_timestamp+nfsi->attrtimeo)) {
|
|
if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
|
|
nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
|
|
nfsi->attrtimeo_timestamp = jiffies;
|
|
}
|
|
/* Don't invalidate the data if we were to blame */
|
|
if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
|
|
|| S_ISLNK(inode->i_mode)))
|
|
invalid &= ~NFS_INO_INVALID_DATA;
|
|
if (data_stable)
|
|
invalid &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME|NFS_INO_REVAL_PAGECACHE);
|
|
if (!nfs_have_delegation(inode, FMODE_READ))
|
|
nfsi->cache_validity |= invalid;
|
|
|
|
return 0;
|
|
out_changed:
|
|
/*
|
|
* Big trouble! The inode has become a different object.
|
|
*/
|
|
#ifdef NFS_PARANOIA
|
|
printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n",
|
|
__FUNCTION__, inode->i_ino, inode->i_mode, fattr->mode);
|
|
#endif
|
|
out_err:
|
|
/*
|
|
* No need to worry about unhashing the dentry, as the
|
|
* lookup validation will know that the inode is bad.
|
|
* (But we fall through to invalidate the caches.)
|
|
*/
|
|
nfs_invalidate_inode(inode);
|
|
return -ESTALE;
|
|
|
|
out_fileid:
|
|
printk(KERN_ERR "NFS: server %s error: fileid changed\n"
|
|
"fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
|
|
NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id,
|
|
(long long)nfsi->fileid, (long long)fattr->fileid);
|
|
goto out_err;
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_NFS_V4
|
|
|
|
/*
|
|
* Clean out any remaining NFSv4 state that might be left over due
|
|
* to open() calls that passed nfs_atomic_lookup, but failed to call
|
|
* nfs_open().
|
|
*/
|
|
void nfs4_clear_inode(struct inode *inode)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
|
|
/* If we are holding a delegation, return it! */
|
|
nfs_inode_return_delegation(inode);
|
|
/* First call standard NFS clear_inode() code */
|
|
nfs_clear_inode(inode);
|
|
/* Now clear out any remaining state */
|
|
while (!list_empty(&nfsi->open_states)) {
|
|
struct nfs4_state *state;
|
|
|
|
state = list_entry(nfsi->open_states.next,
|
|
struct nfs4_state,
|
|
inode_states);
|
|
dprintk("%s(%s/%Ld): found unclaimed NFSv4 state %p\n",
|
|
__FUNCTION__,
|
|
inode->i_sb->s_id,
|
|
(long long)NFS_FILEID(inode),
|
|
state);
|
|
BUG_ON(atomic_read(&state->count) != 1);
|
|
nfs4_close_state(state, state->state);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
struct inode *nfs_alloc_inode(struct super_block *sb)
|
|
{
|
|
struct nfs_inode *nfsi;
|
|
nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
|
|
if (!nfsi)
|
|
return NULL;
|
|
nfsi->flags = 0UL;
|
|
nfsi->cache_validity = 0UL;
|
|
nfsi->cache_change_attribute = jiffies;
|
|
#ifdef CONFIG_NFS_V3_ACL
|
|
nfsi->acl_access = ERR_PTR(-EAGAIN);
|
|
nfsi->acl_default = ERR_PTR(-EAGAIN);
|
|
#endif
|
|
#ifdef CONFIG_NFS_V4
|
|
nfsi->nfs4_acl = NULL;
|
|
#endif /* CONFIG_NFS_V4 */
|
|
return &nfsi->vfs_inode;
|
|
}
|
|
|
|
void nfs_destroy_inode(struct inode *inode)
|
|
{
|
|
kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
|
|
}
|
|
|
|
static inline void nfs4_init_once(struct nfs_inode *nfsi)
|
|
{
|
|
#ifdef CONFIG_NFS_V4
|
|
INIT_LIST_HEAD(&nfsi->open_states);
|
|
nfsi->delegation = NULL;
|
|
nfsi->delegation_state = 0;
|
|
init_rwsem(&nfsi->rwsem);
|
|
#endif
|
|
}
|
|
|
|
static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
|
|
{
|
|
struct nfs_inode *nfsi = (struct nfs_inode *) foo;
|
|
|
|
if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
|
|
SLAB_CTOR_CONSTRUCTOR) {
|
|
inode_init_once(&nfsi->vfs_inode);
|
|
spin_lock_init(&nfsi->req_lock);
|
|
INIT_LIST_HEAD(&nfsi->dirty);
|
|
INIT_LIST_HEAD(&nfsi->commit);
|
|
INIT_LIST_HEAD(&nfsi->open_files);
|
|
INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
|
|
INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
|
|
INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
|
|
atomic_set(&nfsi->data_updates, 0);
|
|
nfsi->ndirty = 0;
|
|
nfsi->ncommit = 0;
|
|
nfsi->npages = 0;
|
|
nfs4_init_once(nfsi);
|
|
}
|
|
}
|
|
|
|
static int __init nfs_init_inodecache(void)
|
|
{
|
|
nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
|
|
sizeof(struct nfs_inode),
|
|
0, (SLAB_RECLAIM_ACCOUNT|
|
|
SLAB_MEM_SPREAD),
|
|
init_once, NULL);
|
|
if (nfs_inode_cachep == NULL)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void nfs_destroy_inodecache(void)
|
|
{
|
|
kmem_cache_destroy(nfs_inode_cachep);
|
|
}
|
|
|
|
/*
|
|
* Initialize NFS
|
|
*/
|
|
static int __init init_nfs_fs(void)
|
|
{
|
|
int err;
|
|
|
|
err = nfs_fs_proc_init();
|
|
if (err)
|
|
goto out5;
|
|
|
|
err = nfs_init_nfspagecache();
|
|
if (err)
|
|
goto out4;
|
|
|
|
err = nfs_init_inodecache();
|
|
if (err)
|
|
goto out3;
|
|
|
|
err = nfs_init_readpagecache();
|
|
if (err)
|
|
goto out2;
|
|
|
|
err = nfs_init_writepagecache();
|
|
if (err)
|
|
goto out1;
|
|
|
|
err = nfs_init_directcache();
|
|
if (err)
|
|
goto out0;
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
rpc_proc_register(&nfs_rpcstat);
|
|
#endif
|
|
if ((err = register_nfs_fs()) != 0)
|
|
goto out;
|
|
return 0;
|
|
out:
|
|
#ifdef CONFIG_PROC_FS
|
|
rpc_proc_unregister("nfs");
|
|
#endif
|
|
nfs_destroy_directcache();
|
|
out0:
|
|
nfs_destroy_writepagecache();
|
|
out1:
|
|
nfs_destroy_readpagecache();
|
|
out2:
|
|
nfs_destroy_inodecache();
|
|
out3:
|
|
nfs_destroy_nfspagecache();
|
|
out4:
|
|
nfs_fs_proc_exit();
|
|
out5:
|
|
return err;
|
|
}
|
|
|
|
static void __exit exit_nfs_fs(void)
|
|
{
|
|
nfs_destroy_directcache();
|
|
nfs_destroy_writepagecache();
|
|
nfs_destroy_readpagecache();
|
|
nfs_destroy_inodecache();
|
|
nfs_destroy_nfspagecache();
|
|
#ifdef CONFIG_PROC_FS
|
|
rpc_proc_unregister("nfs");
|
|
#endif
|
|
unregister_nfs_fs();
|
|
nfs_fs_proc_exit();
|
|
}
|
|
|
|
/* Not quite true; I just maintain it */
|
|
MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(init_nfs_fs)
|
|
module_exit(exit_nfs_fs)
|