mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 00:48:50 +00:00
41d581a9fa
Convert to using the new inode timestamp accessor functions. Signed-off-by: Jeff Layton <jlayton@kernel.org> Link: https://lore.kernel.org/r/20231004185347.80880-49-jlayton@kernel.org Signed-off-by: Christian Brauner <brauner@kernel.org>
2540 lines
70 KiB
C
2540 lines
70 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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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@lxorguk.ukuu.org.uk>, 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/sched/signal.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/seq_file.h>
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#include <linux/mount.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 <linux/slab.h>
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#include <linux/compat.h>
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#include <linux/freezer.h>
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#include <linux/uaccess.h>
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#include <linux/iversion.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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#include "fscache.h"
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#include "pnfs.h"
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#include "nfs.h"
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#include "netns.h"
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#include "sysfs.h"
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#include "nfstrace.h"
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#define NFSDBG_FACILITY NFSDBG_VFS
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#define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
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/* Default is to see 64-bit inode numbers */
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static bool enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED;
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static int nfs_update_inode(struct inode *, struct nfs_fattr *);
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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_wait_bit_killable(struct wait_bit_key *key, int mode)
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{
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schedule();
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if (signal_pending_state(mode, current))
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return -ERESTARTSYS;
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return 0;
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}
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EXPORT_SYMBOL_GPL(nfs_wait_bit_killable);
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/**
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* nfs_compat_user_ino64 - returns the user-visible inode number
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* @fileid: 64-bit fileid
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*
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* This function returns a 32-bit inode number if the boot parameter
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* nfs.enable_ino64 is zero.
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*/
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u64 nfs_compat_user_ino64(u64 fileid)
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{
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#ifdef CONFIG_COMPAT
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compat_ulong_t ino;
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#else
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unsigned long ino;
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#endif
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if (enable_ino64)
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return fileid;
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ino = fileid;
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if (sizeof(ino) < sizeof(fileid))
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ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8;
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return ino;
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}
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int nfs_drop_inode(struct inode *inode)
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{
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return NFS_STALE(inode) || generic_drop_inode(inode);
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}
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EXPORT_SYMBOL_GPL(nfs_drop_inode);
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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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WARN_ON_ONCE(nfs_have_writebacks(inode));
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WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files));
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nfs_zap_acl_cache(inode);
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nfs_access_zap_cache(inode);
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nfs_fscache_clear_inode(inode);
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}
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EXPORT_SYMBOL_GPL(nfs_clear_inode);
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void nfs_evict_inode(struct inode *inode)
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{
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truncate_inode_pages_final(&inode->i_data);
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clear_inode(inode);
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nfs_clear_inode(inode);
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}
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int nfs_sync_inode(struct inode *inode)
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{
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inode_dio_wait(inode);
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return nfs_wb_all(inode);
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}
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EXPORT_SYMBOL_GPL(nfs_sync_inode);
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/**
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* nfs_sync_mapping - helper to flush all mmapped dirty data to disk
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* @mapping: pointer to struct address_space
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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 = 0;
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if (mapping->nrpages != 0) {
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unmap_mapping_range(mapping, 0, 0, 0);
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ret = nfs_wb_all(mapping->host);
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}
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return ret;
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}
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static int nfs_attribute_timeout(struct inode *inode)
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{
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struct nfs_inode *nfsi = NFS_I(inode);
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return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
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}
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static bool nfs_check_cache_flags_invalid(struct inode *inode,
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unsigned long flags)
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{
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unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
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return (cache_validity & flags) != 0;
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}
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bool nfs_check_cache_invalid(struct inode *inode, unsigned long flags)
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{
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if (nfs_check_cache_flags_invalid(inode, flags))
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return true;
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return nfs_attribute_cache_expired(inode);
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}
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EXPORT_SYMBOL_GPL(nfs_check_cache_invalid);
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#ifdef CONFIG_NFS_V4_2
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static bool nfs_has_xattr_cache(const struct nfs_inode *nfsi)
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{
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return nfsi->xattr_cache != NULL;
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}
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#else
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static bool nfs_has_xattr_cache(const struct nfs_inode *nfsi)
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{
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return false;
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}
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#endif
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void nfs_set_cache_invalid(struct inode *inode, unsigned long flags)
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{
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struct nfs_inode *nfsi = NFS_I(inode);
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bool have_delegation = NFS_PROTO(inode)->have_delegation(inode, FMODE_READ);
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if (have_delegation) {
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if (!(flags & NFS_INO_REVAL_FORCED))
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flags &= ~(NFS_INO_INVALID_MODE |
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NFS_INO_INVALID_OTHER |
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NFS_INO_INVALID_XATTR);
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flags &= ~(NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_SIZE);
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}
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if (!nfs_has_xattr_cache(nfsi))
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flags &= ~NFS_INO_INVALID_XATTR;
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if (flags & NFS_INO_INVALID_DATA)
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nfs_fscache_invalidate(inode, 0);
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flags &= ~NFS_INO_REVAL_FORCED;
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nfsi->cache_validity |= flags;
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if (inode->i_mapping->nrpages == 0) {
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nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
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nfs_ooo_clear(nfsi);
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} else if (nfsi->cache_validity & NFS_INO_INVALID_DATA) {
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nfs_ooo_clear(nfsi);
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}
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trace_nfs_set_cache_invalid(inode, 0);
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}
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EXPORT_SYMBOL_GPL(nfs_set_cache_invalid);
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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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nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
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nfsi->attrtimeo_timestamp = jiffies;
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if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
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nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
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NFS_INO_INVALID_DATA |
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NFS_INO_INVALID_ACCESS |
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NFS_INO_INVALID_ACL |
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NFS_INO_INVALID_XATTR);
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else
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nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
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NFS_INO_INVALID_ACCESS |
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NFS_INO_INVALID_ACL |
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NFS_INO_INVALID_XATTR);
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nfs_zap_label_cache_locked(nfsi);
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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_set_cache_invalid(inode, 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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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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EXPORT_SYMBOL_GPL(nfs_zap_acl_cache);
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void nfs_invalidate_atime(struct inode *inode)
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{
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spin_lock(&inode->i_lock);
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nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
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spin_unlock(&inode->i_lock);
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}
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EXPORT_SYMBOL_GPL(nfs_invalidate_atime);
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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_set_inode_stale_locked(struct inode *inode)
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{
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set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
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nfs_zap_caches_locked(inode);
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trace_nfs_set_inode_stale(inode);
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}
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void nfs_set_inode_stale(struct inode *inode)
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{
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spin_lock(&inode->i_lock);
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nfs_set_inode_stale_locked(inode);
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spin_unlock(&inode->i_lock);
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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 = 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 (inode_wrong_type(inode, fattr->mode))
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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 = opaque;
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struct nfs_fattr *fattr = desc->fattr;
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set_nfs_fileid(inode, fattr->fileid);
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inode->i_mode = fattr->mode;
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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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#ifdef CONFIG_NFS_V4_SECURITY_LABEL
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static void nfs_clear_label_invalid(struct inode *inode)
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{
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spin_lock(&inode->i_lock);
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NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_LABEL;
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spin_unlock(&inode->i_lock);
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}
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void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr)
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{
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int error;
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if (fattr->label == NULL)
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return;
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if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) {
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error = security_inode_notifysecctx(inode, fattr->label->label,
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fattr->label->len);
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if (error)
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printk(KERN_ERR "%s() %s %d "
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"security_inode_notifysecctx() %d\n",
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__func__,
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(char *)fattr->label->label,
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fattr->label->len, error);
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nfs_clear_label_invalid(inode);
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}
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}
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struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags)
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{
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struct nfs4_label *label;
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if (!(server->caps & NFS_CAP_SECURITY_LABEL))
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return NULL;
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label = kzalloc(sizeof(struct nfs4_label), flags);
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if (label == NULL)
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return ERR_PTR(-ENOMEM);
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label->label = kzalloc(NFS4_MAXLABELLEN, flags);
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if (label->label == NULL) {
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kfree(label);
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return ERR_PTR(-ENOMEM);
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}
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label->len = NFS4_MAXLABELLEN;
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return label;
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}
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EXPORT_SYMBOL_GPL(nfs4_label_alloc);
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#else
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void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr)
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{
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}
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#endif
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EXPORT_SYMBOL_GPL(nfs_setsecurity);
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/* Search for inode identified by fh, fileid and i_mode in inode cache. */
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struct inode *
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nfs_ilookup(struct super_block *sb, struct nfs_fattr *fattr, struct nfs_fh *fh)
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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;
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unsigned long hash;
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if (!(fattr->valid & NFS_ATTR_FATTR_FILEID) ||
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!(fattr->valid & NFS_ATTR_FATTR_TYPE))
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return NULL;
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hash = nfs_fattr_to_ino_t(fattr);
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inode = ilookup5(sb, hash, nfs_find_actor, &desc);
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dprintk("%s: returning %p\n", __func__, inode);
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return inode;
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}
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|
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static void nfs_inode_init_regular(struct nfs_inode *nfsi)
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{
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atomic_long_set(&nfsi->nrequests, 0);
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atomic_long_set(&nfsi->redirtied_pages, 0);
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INIT_LIST_HEAD(&nfsi->commit_info.list);
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atomic_long_set(&nfsi->commit_info.ncommit, 0);
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atomic_set(&nfsi->commit_info.rpcs_out, 0);
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mutex_init(&nfsi->commit_mutex);
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}
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static void nfs_inode_init_dir(struct nfs_inode *nfsi)
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{
|
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nfsi->cache_change_attribute = 0;
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memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
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init_rwsem(&nfsi->rmdir_sem);
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}
|
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|
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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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u64 fattr_supported = NFS_SB(sb)->fattr_valid;
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unsigned long hash;
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|
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nfs_attr_check_mountpoint(sb, fattr);
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|
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if (nfs_attr_use_mounted_on_fileid(fattr))
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fattr->fileid = fattr->mounted_on_fileid;
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else if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
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goto out_no_inode;
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if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
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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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|
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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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|
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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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unsigned long now = jiffies;
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|
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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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|
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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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nfsi->cache_validity = 0;
|
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if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
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&& (fattr_supported & NFS_ATTR_FATTR_MODE))
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nfs_set_cache_invalid(inode, NFS_INO_INVALID_MODE);
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/* Why so? Because we want revalidate for devices/FIFOs, and
|
|
* that's precisely what we have in nfs_file_inode_operations.
|
|
*/
|
|
inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
|
|
if (S_ISREG(inode->i_mode)) {
|
|
inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops;
|
|
inode->i_data.a_ops = &nfs_file_aops;
|
|
nfs_inode_init_regular(nfsi);
|
|
} else if (S_ISDIR(inode->i_mode)) {
|
|
inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
|
|
inode->i_fop = &nfs_dir_operations;
|
|
inode->i_data.a_ops = &nfs_dir_aops;
|
|
nfs_inode_init_dir(nfsi);
|
|
/* Deal with crossing mountpoints */
|
|
if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT ||
|
|
fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) {
|
|
if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
|
|
inode->i_op = &nfs_referral_inode_operations;
|
|
else
|
|
inode->i_op = &nfs_mountpoint_inode_operations;
|
|
inode->i_fop = NULL;
|
|
inode->i_flags |= S_AUTOMOUNT;
|
|
}
|
|
} else if (S_ISLNK(inode->i_mode)) {
|
|
inode->i_op = &nfs_symlink_inode_operations;
|
|
inode_nohighmem(inode);
|
|
} else
|
|
init_special_inode(inode, inode->i_mode, fattr->rdev);
|
|
|
|
inode_set_atime(inode, 0, 0);
|
|
inode_set_mtime(inode, 0, 0);
|
|
inode_set_ctime(inode, 0, 0);
|
|
inode_set_iversion_raw(inode, 0);
|
|
inode->i_size = 0;
|
|
clear_nlink(inode);
|
|
inode->i_uid = make_kuid(&init_user_ns, -2);
|
|
inode->i_gid = make_kgid(&init_user_ns, -2);
|
|
inode->i_blocks = 0;
|
|
nfsi->write_io = 0;
|
|
nfsi->read_io = 0;
|
|
|
|
nfsi->read_cache_jiffies = fattr->time_start;
|
|
nfsi->attr_gencount = fattr->gencount;
|
|
if (fattr->valid & NFS_ATTR_FATTR_ATIME)
|
|
inode_set_atime_to_ts(inode, fattr->atime);
|
|
else if (fattr_supported & NFS_ATTR_FATTR_ATIME)
|
|
nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
|
|
if (fattr->valid & NFS_ATTR_FATTR_MTIME)
|
|
inode_set_mtime_to_ts(inode, fattr->mtime);
|
|
else if (fattr_supported & NFS_ATTR_FATTR_MTIME)
|
|
nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
|
|
if (fattr->valid & NFS_ATTR_FATTR_CTIME)
|
|
inode_set_ctime_to_ts(inode, fattr->ctime);
|
|
else if (fattr_supported & NFS_ATTR_FATTR_CTIME)
|
|
nfs_set_cache_invalid(inode, NFS_INO_INVALID_CTIME);
|
|
if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
|
|
inode_set_iversion_raw(inode, fattr->change_attr);
|
|
else
|
|
nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE);
|
|
if (fattr->valid & NFS_ATTR_FATTR_SIZE)
|
|
inode->i_size = nfs_size_to_loff_t(fattr->size);
|
|
else
|
|
nfs_set_cache_invalid(inode, NFS_INO_INVALID_SIZE);
|
|
if (fattr->valid & NFS_ATTR_FATTR_NLINK)
|
|
set_nlink(inode, fattr->nlink);
|
|
else if (fattr_supported & NFS_ATTR_FATTR_NLINK)
|
|
nfs_set_cache_invalid(inode, NFS_INO_INVALID_NLINK);
|
|
if (fattr->valid & NFS_ATTR_FATTR_OWNER)
|
|
inode->i_uid = fattr->uid;
|
|
else if (fattr_supported & NFS_ATTR_FATTR_OWNER)
|
|
nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
|
|
if (fattr->valid & NFS_ATTR_FATTR_GROUP)
|
|
inode->i_gid = fattr->gid;
|
|
else if (fattr_supported & NFS_ATTR_FATTR_GROUP)
|
|
nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
|
|
if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
|
|
inode->i_blocks = fattr->du.nfs2.blocks;
|
|
else if (fattr_supported & NFS_ATTR_FATTR_BLOCKS_USED &&
|
|
fattr->size != 0)
|
|
nfs_set_cache_invalid(inode, NFS_INO_INVALID_BLOCKS);
|
|
if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
|
|
/*
|
|
* report the blocks in 512byte units
|
|
*/
|
|
inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
|
|
} else if (fattr_supported & NFS_ATTR_FATTR_SPACE_USED &&
|
|
fattr->size != 0)
|
|
nfs_set_cache_invalid(inode, NFS_INO_INVALID_BLOCKS);
|
|
|
|
nfs_setsecurity(inode, fattr);
|
|
|
|
nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
|
|
nfsi->attrtimeo_timestamp = now;
|
|
nfsi->access_cache = RB_ROOT;
|
|
|
|
nfs_fscache_init_inode(inode);
|
|
|
|
unlock_new_inode(inode);
|
|
} else {
|
|
int err = nfs_refresh_inode(inode, fattr);
|
|
if (err < 0) {
|
|
iput(inode);
|
|
inode = ERR_PTR(err);
|
|
goto out_no_inode;
|
|
}
|
|
}
|
|
dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n",
|
|
inode->i_sb->s_id,
|
|
(unsigned long long)NFS_FILEID(inode),
|
|
nfs_display_fhandle_hash(fh),
|
|
atomic_read(&inode->i_count));
|
|
|
|
out:
|
|
return inode;
|
|
|
|
out_no_inode:
|
|
dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
|
|
goto out;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_fhget);
|
|
|
|
#define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE|ATTR_OPEN)
|
|
|
|
int
|
|
nfs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
|
|
struct iattr *attr)
|
|
{
|
|
struct inode *inode = d_inode(dentry);
|
|
struct nfs_fattr *fattr;
|
|
int error = 0;
|
|
|
|
nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
|
|
|
|
/* skip mode change if it's just for clearing setuid/setgid */
|
|
if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
|
|
attr->ia_valid &= ~ATTR_MODE;
|
|
|
|
if (attr->ia_valid & ATTR_SIZE) {
|
|
BUG_ON(!S_ISREG(inode->i_mode));
|
|
|
|
error = inode_newsize_ok(inode, attr->ia_size);
|
|
if (error)
|
|
return error;
|
|
|
|
if (attr->ia_size == i_size_read(inode))
|
|
attr->ia_valid &= ~ATTR_SIZE;
|
|
}
|
|
|
|
/* Optimization: if the end result is no change, don't RPC */
|
|
if (((attr->ia_valid & NFS_VALID_ATTRS) & ~(ATTR_FILE|ATTR_OPEN)) == 0)
|
|
return 0;
|
|
|
|
trace_nfs_setattr_enter(inode);
|
|
|
|
/* Write all dirty data */
|
|
if (S_ISREG(inode->i_mode))
|
|
nfs_sync_inode(inode);
|
|
|
|
fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode));
|
|
if (fattr == NULL) {
|
|
error = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
error = NFS_PROTO(inode)->setattr(dentry, fattr, attr);
|
|
if (error == 0)
|
|
error = nfs_refresh_inode(inode, fattr);
|
|
nfs_free_fattr(fattr);
|
|
out:
|
|
trace_nfs_setattr_exit(inode, error);
|
|
return error;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_setattr);
|
|
|
|
/**
|
|
* nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
|
|
* @inode: inode of the file used
|
|
* @offset: file offset to start truncating
|
|
*
|
|
* This is a copy of the common vmtruncate, but with the locking
|
|
* corrected to take into account the fact that NFS requires
|
|
* inode->i_size to be updated under the inode->i_lock.
|
|
* Note: must be called with inode->i_lock held!
|
|
*/
|
|
static int nfs_vmtruncate(struct inode * inode, loff_t offset)
|
|
{
|
|
int err;
|
|
|
|
err = inode_newsize_ok(inode, offset);
|
|
if (err)
|
|
goto out;
|
|
|
|
trace_nfs_size_truncate(inode, offset);
|
|
i_size_write(inode, offset);
|
|
/* Optimisation */
|
|
if (offset == 0) {
|
|
NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_DATA;
|
|
nfs_ooo_clear(NFS_I(inode));
|
|
}
|
|
NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_SIZE;
|
|
|
|
spin_unlock(&inode->i_lock);
|
|
truncate_pagecache(inode, offset);
|
|
spin_lock(&inode->i_lock);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* nfs_setattr_update_inode - Update inode metadata after a setattr call.
|
|
* @inode: pointer to struct inode
|
|
* @attr: pointer to struct iattr
|
|
* @fattr: pointer to struct nfs_fattr
|
|
*
|
|
* Note: we do this in the *proc.c in order to ensure that
|
|
* it works for things like exclusive creates too.
|
|
*/
|
|
void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr,
|
|
struct nfs_fattr *fattr)
|
|
{
|
|
/* Barrier: bump the attribute generation count. */
|
|
nfs_fattr_set_barrier(fattr);
|
|
|
|
spin_lock(&inode->i_lock);
|
|
NFS_I(inode)->attr_gencount = fattr->gencount;
|
|
if ((attr->ia_valid & ATTR_SIZE) != 0) {
|
|
nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME |
|
|
NFS_INO_INVALID_BLOCKS);
|
|
nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
|
|
nfs_vmtruncate(inode, attr->ia_size);
|
|
}
|
|
if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
|
|
NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_CTIME;
|
|
if ((attr->ia_valid & ATTR_KILL_SUID) != 0 &&
|
|
inode->i_mode & S_ISUID)
|
|
inode->i_mode &= ~S_ISUID;
|
|
if (setattr_should_drop_sgid(&nop_mnt_idmap, inode))
|
|
inode->i_mode &= ~S_ISGID;
|
|
if ((attr->ia_valid & ATTR_MODE) != 0) {
|
|
int mode = attr->ia_mode & S_IALLUGO;
|
|
mode |= inode->i_mode & ~S_IALLUGO;
|
|
inode->i_mode = mode;
|
|
}
|
|
if ((attr->ia_valid & ATTR_UID) != 0)
|
|
inode->i_uid = attr->ia_uid;
|
|
if ((attr->ia_valid & ATTR_GID) != 0)
|
|
inode->i_gid = attr->ia_gid;
|
|
if (fattr->valid & NFS_ATTR_FATTR_CTIME)
|
|
inode_set_ctime_to_ts(inode, fattr->ctime);
|
|
else
|
|
nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
|
|
| NFS_INO_INVALID_CTIME);
|
|
nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS
|
|
| NFS_INO_INVALID_ACL);
|
|
}
|
|
if (attr->ia_valid & (ATTR_ATIME_SET|ATTR_ATIME)) {
|
|
NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_ATIME
|
|
| NFS_INO_INVALID_CTIME);
|
|
if (fattr->valid & NFS_ATTR_FATTR_ATIME)
|
|
inode_set_atime_to_ts(inode, fattr->atime);
|
|
else if (attr->ia_valid & ATTR_ATIME_SET)
|
|
inode_set_atime_to_ts(inode, attr->ia_atime);
|
|
else
|
|
nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
|
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_CTIME)
|
|
inode_set_ctime_to_ts(inode, fattr->ctime);
|
|
else
|
|
nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
|
|
| NFS_INO_INVALID_CTIME);
|
|
}
|
|
if (attr->ia_valid & (ATTR_MTIME_SET|ATTR_MTIME)) {
|
|
NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_MTIME
|
|
| NFS_INO_INVALID_CTIME);
|
|
if (fattr->valid & NFS_ATTR_FATTR_MTIME)
|
|
inode_set_mtime_to_ts(inode, fattr->mtime);
|
|
else if (attr->ia_valid & ATTR_MTIME_SET)
|
|
inode_set_mtime_to_ts(inode, attr->ia_mtime);
|
|
else
|
|
nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
|
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_CTIME)
|
|
inode_set_ctime_to_ts(inode, fattr->ctime);
|
|
else
|
|
nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
|
|
| NFS_INO_INVALID_CTIME);
|
|
}
|
|
if (fattr->valid)
|
|
nfs_update_inode(inode, fattr);
|
|
spin_unlock(&inode->i_lock);
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_setattr_update_inode);
|
|
|
|
/*
|
|
* Don't request help from readdirplus if the file is being written to,
|
|
* or if attribute caching is turned off
|
|
*/
|
|
static bool nfs_getattr_readdirplus_enable(const struct inode *inode)
|
|
{
|
|
return nfs_server_capable(inode, NFS_CAP_READDIRPLUS) &&
|
|
!nfs_have_writebacks(inode) && NFS_MAXATTRTIMEO(inode) > 5 * HZ;
|
|
}
|
|
|
|
static void nfs_readdirplus_parent_cache_miss(struct dentry *dentry)
|
|
{
|
|
if (!IS_ROOT(dentry)) {
|
|
struct dentry *parent = dget_parent(dentry);
|
|
nfs_readdir_record_entry_cache_miss(d_inode(parent));
|
|
dput(parent);
|
|
}
|
|
}
|
|
|
|
static void nfs_readdirplus_parent_cache_hit(struct dentry *dentry)
|
|
{
|
|
if (!IS_ROOT(dentry)) {
|
|
struct dentry *parent = dget_parent(dentry);
|
|
nfs_readdir_record_entry_cache_hit(d_inode(parent));
|
|
dput(parent);
|
|
}
|
|
}
|
|
|
|
static u32 nfs_get_valid_attrmask(struct inode *inode)
|
|
{
|
|
unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
|
|
u32 reply_mask = STATX_INO | STATX_TYPE;
|
|
|
|
if (!(cache_validity & NFS_INO_INVALID_ATIME))
|
|
reply_mask |= STATX_ATIME;
|
|
if (!(cache_validity & NFS_INO_INVALID_CTIME))
|
|
reply_mask |= STATX_CTIME;
|
|
if (!(cache_validity & NFS_INO_INVALID_MTIME))
|
|
reply_mask |= STATX_MTIME;
|
|
if (!(cache_validity & NFS_INO_INVALID_SIZE))
|
|
reply_mask |= STATX_SIZE;
|
|
if (!(cache_validity & NFS_INO_INVALID_NLINK))
|
|
reply_mask |= STATX_NLINK;
|
|
if (!(cache_validity & NFS_INO_INVALID_MODE))
|
|
reply_mask |= STATX_MODE;
|
|
if (!(cache_validity & NFS_INO_INVALID_OTHER))
|
|
reply_mask |= STATX_UID | STATX_GID;
|
|
if (!(cache_validity & NFS_INO_INVALID_BLOCKS))
|
|
reply_mask |= STATX_BLOCKS;
|
|
if (!(cache_validity & NFS_INO_INVALID_CHANGE))
|
|
reply_mask |= STATX_CHANGE_COOKIE;
|
|
return reply_mask;
|
|
}
|
|
|
|
int nfs_getattr(struct mnt_idmap *idmap, const struct path *path,
|
|
struct kstat *stat, u32 request_mask, unsigned int query_flags)
|
|
{
|
|
struct inode *inode = d_inode(path->dentry);
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
unsigned long cache_validity;
|
|
int err = 0;
|
|
bool force_sync = query_flags & AT_STATX_FORCE_SYNC;
|
|
bool do_update = false;
|
|
bool readdirplus_enabled = nfs_getattr_readdirplus_enable(inode);
|
|
|
|
trace_nfs_getattr_enter(inode);
|
|
|
|
request_mask &= STATX_TYPE | STATX_MODE | STATX_NLINK | STATX_UID |
|
|
STATX_GID | STATX_ATIME | STATX_MTIME | STATX_CTIME |
|
|
STATX_INO | STATX_SIZE | STATX_BLOCKS |
|
|
STATX_CHANGE_COOKIE;
|
|
|
|
if ((query_flags & AT_STATX_DONT_SYNC) && !force_sync) {
|
|
if (readdirplus_enabled)
|
|
nfs_readdirplus_parent_cache_hit(path->dentry);
|
|
goto out_no_revalidate;
|
|
}
|
|
|
|
/* Flush out writes to the server in order to update c/mtime/version. */
|
|
if ((request_mask & (STATX_CTIME | STATX_MTIME | STATX_CHANGE_COOKIE)) &&
|
|
S_ISREG(inode->i_mode))
|
|
filemap_write_and_wait(inode->i_mapping);
|
|
|
|
/*
|
|
* We may force a getattr if the user cares about atime.
|
|
*
|
|
* Note that we only have to check the vfsmount flags here:
|
|
* - NFS always sets S_NOATIME by so checking it would give a
|
|
* bogus result
|
|
* - NFS never sets SB_NOATIME or SB_NODIRATIME so there is
|
|
* no point in checking those.
|
|
*/
|
|
if ((path->mnt->mnt_flags & MNT_NOATIME) ||
|
|
((path->mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
|
|
request_mask &= ~STATX_ATIME;
|
|
|
|
/* Is the user requesting attributes that might need revalidation? */
|
|
if (!(request_mask & (STATX_MODE|STATX_NLINK|STATX_ATIME|STATX_CTIME|
|
|
STATX_MTIME|STATX_UID|STATX_GID|
|
|
STATX_SIZE|STATX_BLOCKS|
|
|
STATX_CHANGE_COOKIE)))
|
|
goto out_no_revalidate;
|
|
|
|
/* Check whether the cached attributes are stale */
|
|
do_update |= force_sync || nfs_attribute_cache_expired(inode);
|
|
cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
|
|
do_update |= cache_validity & NFS_INO_INVALID_CHANGE;
|
|
if (request_mask & STATX_ATIME)
|
|
do_update |= cache_validity & NFS_INO_INVALID_ATIME;
|
|
if (request_mask & STATX_CTIME)
|
|
do_update |= cache_validity & NFS_INO_INVALID_CTIME;
|
|
if (request_mask & STATX_MTIME)
|
|
do_update |= cache_validity & NFS_INO_INVALID_MTIME;
|
|
if (request_mask & STATX_SIZE)
|
|
do_update |= cache_validity & NFS_INO_INVALID_SIZE;
|
|
if (request_mask & STATX_NLINK)
|
|
do_update |= cache_validity & NFS_INO_INVALID_NLINK;
|
|
if (request_mask & STATX_MODE)
|
|
do_update |= cache_validity & NFS_INO_INVALID_MODE;
|
|
if (request_mask & (STATX_UID | STATX_GID))
|
|
do_update |= cache_validity & NFS_INO_INVALID_OTHER;
|
|
if (request_mask & STATX_BLOCKS)
|
|
do_update |= cache_validity & NFS_INO_INVALID_BLOCKS;
|
|
|
|
if (do_update) {
|
|
if (readdirplus_enabled)
|
|
nfs_readdirplus_parent_cache_miss(path->dentry);
|
|
err = __nfs_revalidate_inode(server, inode);
|
|
if (err)
|
|
goto out;
|
|
} else if (readdirplus_enabled)
|
|
nfs_readdirplus_parent_cache_hit(path->dentry);
|
|
out_no_revalidate:
|
|
/* Only return attributes that were revalidated. */
|
|
stat->result_mask = nfs_get_valid_attrmask(inode) | request_mask;
|
|
|
|
generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat);
|
|
stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
|
|
stat->change_cookie = inode_peek_iversion_raw(inode);
|
|
stat->attributes_mask |= STATX_ATTR_CHANGE_MONOTONIC;
|
|
if (server->change_attr_type != NFS4_CHANGE_TYPE_IS_UNDEFINED)
|
|
stat->attributes |= STATX_ATTR_CHANGE_MONOTONIC;
|
|
if (S_ISDIR(inode->i_mode))
|
|
stat->blksize = NFS_SERVER(inode)->dtsize;
|
|
out:
|
|
trace_nfs_getattr_exit(inode, err);
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_getattr);
|
|
|
|
static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
|
|
{
|
|
refcount_set(&l_ctx->count, 1);
|
|
l_ctx->lockowner = current->files;
|
|
INIT_LIST_HEAD(&l_ctx->list);
|
|
atomic_set(&l_ctx->io_count, 0);
|
|
}
|
|
|
|
static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx)
|
|
{
|
|
struct nfs_lock_context *pos;
|
|
|
|
list_for_each_entry_rcu(pos, &ctx->lock_context.list, list) {
|
|
if (pos->lockowner != current->files)
|
|
continue;
|
|
if (refcount_inc_not_zero(&pos->count))
|
|
return pos;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
|
|
{
|
|
struct nfs_lock_context *res, *new = NULL;
|
|
struct inode *inode = d_inode(ctx->dentry);
|
|
|
|
rcu_read_lock();
|
|
res = __nfs_find_lock_context(ctx);
|
|
rcu_read_unlock();
|
|
if (res == NULL) {
|
|
new = kmalloc(sizeof(*new), GFP_KERNEL_ACCOUNT);
|
|
if (new == NULL)
|
|
return ERR_PTR(-ENOMEM);
|
|
nfs_init_lock_context(new);
|
|
spin_lock(&inode->i_lock);
|
|
res = __nfs_find_lock_context(ctx);
|
|
if (res == NULL) {
|
|
new->open_context = get_nfs_open_context(ctx);
|
|
if (new->open_context) {
|
|
list_add_tail_rcu(&new->list,
|
|
&ctx->lock_context.list);
|
|
res = new;
|
|
new = NULL;
|
|
} else
|
|
res = ERR_PTR(-EBADF);
|
|
}
|
|
spin_unlock(&inode->i_lock);
|
|
kfree(new);
|
|
}
|
|
return res;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_get_lock_context);
|
|
|
|
void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
|
|
{
|
|
struct nfs_open_context *ctx = l_ctx->open_context;
|
|
struct inode *inode = d_inode(ctx->dentry);
|
|
|
|
if (!refcount_dec_and_lock(&l_ctx->count, &inode->i_lock))
|
|
return;
|
|
list_del_rcu(&l_ctx->list);
|
|
spin_unlock(&inode->i_lock);
|
|
put_nfs_open_context(ctx);
|
|
kfree_rcu(l_ctx, rcu_head);
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_put_lock_context);
|
|
|
|
/**
|
|
* nfs_close_context - Common close_context() routine NFSv2/v3
|
|
* @ctx: pointer to context
|
|
* @is_sync: is this a synchronous close
|
|
*
|
|
* Ensure that the attributes are up to date if we're mounted
|
|
* with close-to-open semantics and we have cached data that will
|
|
* need to be revalidated on open.
|
|
*/
|
|
void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
|
|
{
|
|
struct nfs_inode *nfsi;
|
|
struct inode *inode;
|
|
|
|
if (!(ctx->mode & FMODE_WRITE))
|
|
return;
|
|
if (!is_sync)
|
|
return;
|
|
inode = d_inode(ctx->dentry);
|
|
if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
|
|
return;
|
|
nfsi = NFS_I(inode);
|
|
if (inode->i_mapping->nrpages == 0)
|
|
return;
|
|
if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
|
|
return;
|
|
if (!list_empty(&nfsi->open_files))
|
|
return;
|
|
if (NFS_SERVER(inode)->flags & NFS_MOUNT_NOCTO)
|
|
return;
|
|
nfs_revalidate_inode(inode,
|
|
NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_SIZE);
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_close_context);
|
|
|
|
struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry,
|
|
fmode_t f_mode,
|
|
struct file *filp)
|
|
{
|
|
struct nfs_open_context *ctx;
|
|
|
|
ctx = kmalloc(sizeof(*ctx), GFP_KERNEL_ACCOUNT);
|
|
if (!ctx)
|
|
return ERR_PTR(-ENOMEM);
|
|
nfs_sb_active(dentry->d_sb);
|
|
ctx->dentry = dget(dentry);
|
|
if (filp)
|
|
ctx->cred = get_cred(filp->f_cred);
|
|
else
|
|
ctx->cred = get_current_cred();
|
|
rcu_assign_pointer(ctx->ll_cred, NULL);
|
|
ctx->state = NULL;
|
|
ctx->mode = f_mode;
|
|
ctx->flags = 0;
|
|
ctx->error = 0;
|
|
ctx->flock_owner = (fl_owner_t)filp;
|
|
nfs_init_lock_context(&ctx->lock_context);
|
|
ctx->lock_context.open_context = ctx;
|
|
INIT_LIST_HEAD(&ctx->list);
|
|
ctx->mdsthreshold = NULL;
|
|
return ctx;
|
|
}
|
|
EXPORT_SYMBOL_GPL(alloc_nfs_open_context);
|
|
|
|
struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
|
|
{
|
|
if (ctx != NULL && refcount_inc_not_zero(&ctx->lock_context.count))
|
|
return ctx;
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(get_nfs_open_context);
|
|
|
|
static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
|
|
{
|
|
struct inode *inode = d_inode(ctx->dentry);
|
|
struct super_block *sb = ctx->dentry->d_sb;
|
|
|
|
if (!refcount_dec_and_test(&ctx->lock_context.count))
|
|
return;
|
|
if (!list_empty(&ctx->list)) {
|
|
spin_lock(&inode->i_lock);
|
|
list_del_rcu(&ctx->list);
|
|
spin_unlock(&inode->i_lock);
|
|
}
|
|
if (inode != NULL)
|
|
NFS_PROTO(inode)->close_context(ctx, is_sync);
|
|
put_cred(ctx->cred);
|
|
dput(ctx->dentry);
|
|
nfs_sb_deactive(sb);
|
|
put_rpccred(rcu_dereference_protected(ctx->ll_cred, 1));
|
|
kfree(ctx->mdsthreshold);
|
|
kfree_rcu(ctx, rcu_head);
|
|
}
|
|
|
|
void put_nfs_open_context(struct nfs_open_context *ctx)
|
|
{
|
|
__put_nfs_open_context(ctx, 0);
|
|
}
|
|
EXPORT_SYMBOL_GPL(put_nfs_open_context);
|
|
|
|
static void put_nfs_open_context_sync(struct nfs_open_context *ctx)
|
|
{
|
|
__put_nfs_open_context(ctx, 1);
|
|
}
|
|
|
|
/*
|
|
* Ensure that mmap has a recent RPC credential for use when writing out
|
|
* shared pages
|
|
*/
|
|
void nfs_inode_attach_open_context(struct nfs_open_context *ctx)
|
|
{
|
|
struct inode *inode = d_inode(ctx->dentry);
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
|
|
spin_lock(&inode->i_lock);
|
|
if (list_empty(&nfsi->open_files) &&
|
|
nfs_ooo_test(nfsi))
|
|
nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA |
|
|
NFS_INO_REVAL_FORCED);
|
|
list_add_tail_rcu(&ctx->list, &nfsi->open_files);
|
|
spin_unlock(&inode->i_lock);
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context);
|
|
|
|
void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
|
|
{
|
|
filp->private_data = get_nfs_open_context(ctx);
|
|
set_bit(NFS_CONTEXT_FILE_OPEN, &ctx->flags);
|
|
if (list_empty(&ctx->list))
|
|
nfs_inode_attach_open_context(ctx);
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_file_set_open_context);
|
|
|
|
/*
|
|
* Given an inode, search for an open context with the desired characteristics
|
|
*/
|
|
struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct cred *cred, fmode_t mode)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
struct nfs_open_context *pos, *ctx = NULL;
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(pos, &nfsi->open_files, list) {
|
|
if (cred != NULL && cred_fscmp(pos->cred, cred) != 0)
|
|
continue;
|
|
if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
|
|
continue;
|
|
if (!test_bit(NFS_CONTEXT_FILE_OPEN, &pos->flags))
|
|
continue;
|
|
ctx = get_nfs_open_context(pos);
|
|
if (ctx)
|
|
break;
|
|
}
|
|
rcu_read_unlock();
|
|
return ctx;
|
|
}
|
|
|
|
void nfs_file_clear_open_context(struct file *filp)
|
|
{
|
|
struct nfs_open_context *ctx = nfs_file_open_context(filp);
|
|
|
|
if (ctx) {
|
|
struct inode *inode = d_inode(ctx->dentry);
|
|
|
|
clear_bit(NFS_CONTEXT_FILE_OPEN, &ctx->flags);
|
|
/*
|
|
* We fatal error on write before. Try to writeback
|
|
* every page again.
|
|
*/
|
|
if (ctx->error < 0)
|
|
invalidate_inode_pages2(inode->i_mapping);
|
|
filp->private_data = NULL;
|
|
put_nfs_open_context_sync(ctx);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* These allocate and release file read/write context information.
|
|
*/
|
|
int nfs_open(struct inode *inode, struct file *filp)
|
|
{
|
|
struct nfs_open_context *ctx;
|
|
|
|
ctx = alloc_nfs_open_context(file_dentry(filp),
|
|
flags_to_mode(filp->f_flags), filp);
|
|
if (IS_ERR(ctx))
|
|
return PTR_ERR(ctx);
|
|
nfs_file_set_open_context(filp, ctx);
|
|
put_nfs_open_context(ctx);
|
|
nfs_fscache_open_file(inode, 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 = NULL;
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
|
|
dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n",
|
|
inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode));
|
|
|
|
trace_nfs_revalidate_inode_enter(inode);
|
|
|
|
if (is_bad_inode(inode))
|
|
goto out;
|
|
if (NFS_STALE(inode))
|
|
goto out;
|
|
|
|
/* pNFS: Attributes aren't updated until we layoutcommit */
|
|
if (S_ISREG(inode->i_mode)) {
|
|
status = pnfs_sync_inode(inode, false);
|
|
if (status)
|
|
goto out;
|
|
}
|
|
|
|
status = -ENOMEM;
|
|
fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode));
|
|
if (fattr == NULL)
|
|
goto out;
|
|
|
|
nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
|
|
|
|
status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, inode);
|
|
if (status != 0) {
|
|
dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n",
|
|
inode->i_sb->s_id,
|
|
(unsigned long long)NFS_FILEID(inode), status);
|
|
switch (status) {
|
|
case -ETIMEDOUT:
|
|
/* A soft timeout occurred. Use cached information? */
|
|
if (server->flags & NFS_MOUNT_SOFTREVAL)
|
|
status = 0;
|
|
break;
|
|
case -ESTALE:
|
|
if (!S_ISDIR(inode->i_mode))
|
|
nfs_set_inode_stale(inode);
|
|
else
|
|
nfs_zap_caches(inode);
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
status = nfs_refresh_inode(inode, fattr);
|
|
if (status) {
|
|
dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n",
|
|
inode->i_sb->s_id,
|
|
(unsigned long long)NFS_FILEID(inode), status);
|
|
goto out;
|
|
}
|
|
|
|
if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
|
|
nfs_zap_acl_cache(inode);
|
|
|
|
nfs_setsecurity(inode, fattr);
|
|
|
|
dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n",
|
|
inode->i_sb->s_id,
|
|
(unsigned long long)NFS_FILEID(inode));
|
|
|
|
out:
|
|
nfs_free_fattr(fattr);
|
|
trace_nfs_revalidate_inode_exit(inode, status);
|
|
return status;
|
|
}
|
|
|
|
int nfs_attribute_cache_expired(struct inode *inode)
|
|
{
|
|
if (nfs_have_delegated_attributes(inode))
|
|
return 0;
|
|
return nfs_attribute_timeout(inode);
|
|
}
|
|
|
|
/**
|
|
* nfs_revalidate_inode - Revalidate the inode attributes
|
|
* @inode: pointer to inode struct
|
|
* @flags: cache flags to check
|
|
*
|
|
* Updates inode attribute information by retrieving the data from the server.
|
|
*/
|
|
int nfs_revalidate_inode(struct inode *inode, unsigned long flags)
|
|
{
|
|
if (!nfs_check_cache_invalid(inode, flags))
|
|
return NFS_STALE(inode) ? -ESTALE : 0;
|
|
return __nfs_revalidate_inode(NFS_SERVER(inode), inode);
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_revalidate_inode);
|
|
|
|
static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
|
|
{
|
|
int ret;
|
|
|
|
nfs_fscache_invalidate(inode, 0);
|
|
if (mapping->nrpages != 0) {
|
|
if (S_ISREG(inode->i_mode)) {
|
|
ret = nfs_sync_mapping(mapping);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
ret = invalidate_inode_pages2(mapping);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
|
|
|
|
dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n",
|
|
inode->i_sb->s_id,
|
|
(unsigned long long)NFS_FILEID(inode));
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* nfs_clear_invalid_mapping - Conditionally clear a mapping
|
|
* @mapping: pointer to mapping
|
|
*
|
|
* If the NFS_INO_INVALID_DATA inode flag is set, clear the mapping.
|
|
*/
|
|
int nfs_clear_invalid_mapping(struct address_space *mapping)
|
|
{
|
|
struct inode *inode = mapping->host;
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
unsigned long *bitlock = &nfsi->flags;
|
|
int ret = 0;
|
|
|
|
/*
|
|
* We must clear NFS_INO_INVALID_DATA first to ensure that
|
|
* invalidations that come in while we're shooting down the mappings
|
|
* are respected. But, that leaves a race window where one revalidator
|
|
* can clear the flag, and then another checks it before the mapping
|
|
* gets invalidated. Fix that by serializing access to this part of
|
|
* the function.
|
|
*
|
|
* At the same time, we need to allow other tasks to see whether we
|
|
* might be in the middle of invalidating the pages, so we only set
|
|
* the bit lock here if it looks like we're going to be doing that.
|
|
*/
|
|
for (;;) {
|
|
ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING,
|
|
nfs_wait_bit_killable,
|
|
TASK_KILLABLE|TASK_FREEZABLE_UNSAFE);
|
|
if (ret)
|
|
goto out;
|
|
spin_lock(&inode->i_lock);
|
|
if (test_bit(NFS_INO_INVALIDATING, bitlock)) {
|
|
spin_unlock(&inode->i_lock);
|
|
continue;
|
|
}
|
|
if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
|
|
break;
|
|
spin_unlock(&inode->i_lock);
|
|
goto out;
|
|
}
|
|
|
|
set_bit(NFS_INO_INVALIDATING, bitlock);
|
|
smp_wmb();
|
|
nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
|
|
nfs_ooo_clear(nfsi);
|
|
spin_unlock(&inode->i_lock);
|
|
trace_nfs_invalidate_mapping_enter(inode);
|
|
ret = nfs_invalidate_mapping(inode, mapping);
|
|
trace_nfs_invalidate_mapping_exit(inode, ret);
|
|
|
|
clear_bit_unlock(NFS_INO_INVALIDATING, bitlock);
|
|
smp_mb__after_atomic();
|
|
wake_up_bit(bitlock, NFS_INO_INVALIDATING);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
bool nfs_mapping_need_revalidate_inode(struct inode *inode)
|
|
{
|
|
return nfs_check_cache_invalid(inode, NFS_INO_INVALID_CHANGE) ||
|
|
NFS_STALE(inode);
|
|
}
|
|
|
|
int nfs_revalidate_mapping_rcu(struct inode *inode)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
unsigned long *bitlock = &nfsi->flags;
|
|
int ret = 0;
|
|
|
|
if (IS_SWAPFILE(inode))
|
|
goto out;
|
|
if (nfs_mapping_need_revalidate_inode(inode)) {
|
|
ret = -ECHILD;
|
|
goto out;
|
|
}
|
|
spin_lock(&inode->i_lock);
|
|
if (test_bit(NFS_INO_INVALIDATING, bitlock) ||
|
|
(nfsi->cache_validity & NFS_INO_INVALID_DATA))
|
|
ret = -ECHILD;
|
|
spin_unlock(&inode->i_lock);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* nfs_revalidate_mapping - Revalidate the pagecache
|
|
* @inode: pointer to host inode
|
|
* @mapping: pointer to mapping
|
|
*/
|
|
int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
|
|
{
|
|
/* swapfiles are not supposed to be shared. */
|
|
if (IS_SWAPFILE(inode))
|
|
return 0;
|
|
|
|
if (nfs_mapping_need_revalidate_inode(inode)) {
|
|
int ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return nfs_clear_invalid_mapping(mapping);
|
|
}
|
|
|
|
static bool nfs_file_has_writers(struct nfs_inode *nfsi)
|
|
{
|
|
struct inode *inode = &nfsi->vfs_inode;
|
|
|
|
if (!S_ISREG(inode->i_mode))
|
|
return false;
|
|
if (list_empty(&nfsi->open_files))
|
|
return false;
|
|
return inode_is_open_for_write(inode);
|
|
}
|
|
|
|
static bool nfs_file_has_buffered_writers(struct nfs_inode *nfsi)
|
|
{
|
|
return nfs_file_has_writers(nfsi) && nfs_file_io_is_buffered(nfsi);
|
|
}
|
|
|
|
static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
|
|
{
|
|
struct timespec64 ts;
|
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
|
|
&& (fattr->valid & NFS_ATTR_FATTR_CHANGE)
|
|
&& inode_eq_iversion_raw(inode, fattr->pre_change_attr)) {
|
|
inode_set_iversion_raw(inode, fattr->change_attr);
|
|
if (S_ISDIR(inode->i_mode))
|
|
nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
|
|
else if (nfs_server_capable(inode, NFS_CAP_XATTR))
|
|
nfs_set_cache_invalid(inode, NFS_INO_INVALID_XATTR);
|
|
}
|
|
/* If we have atomic WCC data, we may update some attributes */
|
|
ts = inode_get_ctime(inode);
|
|
if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
|
|
&& (fattr->valid & NFS_ATTR_FATTR_CTIME)
|
|
&& timespec64_equal(&ts, &fattr->pre_ctime)) {
|
|
inode_set_ctime_to_ts(inode, fattr->ctime);
|
|
}
|
|
|
|
ts = inode_get_mtime(inode);
|
|
if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
|
|
&& (fattr->valid & NFS_ATTR_FATTR_MTIME)
|
|
&& timespec64_equal(&ts, &fattr->pre_mtime)) {
|
|
inode_set_mtime_to_ts(inode, fattr->mtime);
|
|
}
|
|
if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
|
|
&& (fattr->valid & NFS_ATTR_FATTR_SIZE)
|
|
&& i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
|
|
&& !nfs_have_writebacks(inode)) {
|
|
trace_nfs_size_wcc(inode, fattr->size);
|
|
i_size_write(inode, nfs_size_to_loff_t(fattr->size));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
unsigned long invalid = 0;
|
|
struct timespec64 ts;
|
|
|
|
if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
|
|
return 0;
|
|
|
|
if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) {
|
|
/* Only a mounted-on-fileid? Just exit */
|
|
if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
|
|
return 0;
|
|
/* Has the inode gone and changed behind our back? */
|
|
} else if (nfsi->fileid != fattr->fileid) {
|
|
/* Is this perhaps the mounted-on fileid? */
|
|
if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) &&
|
|
nfsi->fileid == fattr->mounted_on_fileid)
|
|
return 0;
|
|
return -ESTALE;
|
|
}
|
|
if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && inode_wrong_type(inode, fattr->mode))
|
|
return -ESTALE;
|
|
|
|
|
|
if (!nfs_file_has_buffered_writers(nfsi)) {
|
|
/* Verify a few of the more important attributes */
|
|
if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && !inode_eq_iversion_raw(inode, fattr->change_attr))
|
|
invalid |= NFS_INO_INVALID_CHANGE;
|
|
|
|
ts = inode_get_mtime(inode);
|
|
if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec64_equal(&ts, &fattr->mtime))
|
|
invalid |= NFS_INO_INVALID_MTIME;
|
|
|
|
ts = inode_get_ctime(inode);
|
|
if ((fattr->valid & NFS_ATTR_FATTR_CTIME) && !timespec64_equal(&ts, &fattr->ctime))
|
|
invalid |= NFS_INO_INVALID_CTIME;
|
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
|
|
cur_size = i_size_read(inode);
|
|
new_isize = nfs_size_to_loff_t(fattr->size);
|
|
if (cur_size != new_isize)
|
|
invalid |= NFS_INO_INVALID_SIZE;
|
|
}
|
|
}
|
|
|
|
/* Have any file permissions changed? */
|
|
if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
|
|
invalid |= NFS_INO_INVALID_MODE;
|
|
if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid))
|
|
invalid |= NFS_INO_INVALID_OTHER;
|
|
if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid))
|
|
invalid |= NFS_INO_INVALID_OTHER;
|
|
|
|
/* Has the link count changed? */
|
|
if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
|
|
invalid |= NFS_INO_INVALID_NLINK;
|
|
|
|
ts = inode_get_atime(inode);
|
|
if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec64_equal(&ts, &fattr->atime))
|
|
invalid |= NFS_INO_INVALID_ATIME;
|
|
|
|
if (invalid != 0)
|
|
nfs_set_cache_invalid(inode, invalid);
|
|
|
|
nfsi->read_cache_jiffies = fattr->time_start;
|
|
return 0;
|
|
}
|
|
|
|
static atomic_long_t nfs_attr_generation_counter;
|
|
|
|
static unsigned long nfs_read_attr_generation_counter(void)
|
|
{
|
|
return atomic_long_read(&nfs_attr_generation_counter);
|
|
}
|
|
|
|
unsigned long nfs_inc_attr_generation_counter(void)
|
|
{
|
|
return atomic_long_inc_return(&nfs_attr_generation_counter);
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter);
|
|
|
|
void nfs_fattr_init(struct nfs_fattr *fattr)
|
|
{
|
|
fattr->valid = 0;
|
|
fattr->time_start = jiffies;
|
|
fattr->gencount = nfs_inc_attr_generation_counter();
|
|
fattr->owner_name = NULL;
|
|
fattr->group_name = NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_fattr_init);
|
|
|
|
/**
|
|
* nfs_fattr_set_barrier
|
|
* @fattr: attributes
|
|
*
|
|
* Used to set a barrier after an attribute was updated. This
|
|
* barrier ensures that older attributes from RPC calls that may
|
|
* have raced with our update cannot clobber these new values.
|
|
* Note that you are still responsible for ensuring that other
|
|
* operations which change the attribute on the server do not
|
|
* collide.
|
|
*/
|
|
void nfs_fattr_set_barrier(struct nfs_fattr *fattr)
|
|
{
|
|
fattr->gencount = nfs_inc_attr_generation_counter();
|
|
}
|
|
|
|
struct nfs_fattr *nfs_alloc_fattr(void)
|
|
{
|
|
struct nfs_fattr *fattr;
|
|
|
|
fattr = kmalloc(sizeof(*fattr), GFP_KERNEL);
|
|
if (fattr != NULL) {
|
|
nfs_fattr_init(fattr);
|
|
fattr->label = NULL;
|
|
}
|
|
return fattr;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_alloc_fattr);
|
|
|
|
struct nfs_fattr *nfs_alloc_fattr_with_label(struct nfs_server *server)
|
|
{
|
|
struct nfs_fattr *fattr = nfs_alloc_fattr();
|
|
|
|
if (!fattr)
|
|
return NULL;
|
|
|
|
fattr->label = nfs4_label_alloc(server, GFP_KERNEL);
|
|
if (IS_ERR(fattr->label)) {
|
|
kfree(fattr);
|
|
return NULL;
|
|
}
|
|
|
|
return fattr;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_alloc_fattr_with_label);
|
|
|
|
struct nfs_fh *nfs_alloc_fhandle(void)
|
|
{
|
|
struct nfs_fh *fh;
|
|
|
|
fh = kmalloc(sizeof(struct nfs_fh), GFP_KERNEL);
|
|
if (fh != NULL)
|
|
fh->size = 0;
|
|
return fh;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_alloc_fhandle);
|
|
|
|
#ifdef NFS_DEBUG
|
|
/*
|
|
* _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
|
|
* in the same way that wireshark does
|
|
*
|
|
* @fh: file handle
|
|
*
|
|
* For debugging only.
|
|
*/
|
|
u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh)
|
|
{
|
|
/* wireshark uses 32-bit AUTODIN crc and does a bitwise
|
|
* not on the result */
|
|
return nfs_fhandle_hash(fh);
|
|
}
|
|
EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash);
|
|
|
|
/*
|
|
* _nfs_display_fhandle - display an NFS file handle on the console
|
|
*
|
|
* @fh: file handle to display
|
|
* @caption: display caption
|
|
*
|
|
* For debugging only.
|
|
*/
|
|
void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption)
|
|
{
|
|
unsigned short i;
|
|
|
|
if (fh == NULL || fh->size == 0) {
|
|
printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh);
|
|
return;
|
|
}
|
|
|
|
printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n",
|
|
caption, fh, fh->size, _nfs_display_fhandle_hash(fh));
|
|
for (i = 0; i < fh->size; i += 16) {
|
|
__be32 *pos = (__be32 *)&fh->data[i];
|
|
|
|
switch ((fh->size - i - 1) >> 2) {
|
|
case 0:
|
|
printk(KERN_DEFAULT " %08x\n",
|
|
be32_to_cpup(pos));
|
|
break;
|
|
case 1:
|
|
printk(KERN_DEFAULT " %08x %08x\n",
|
|
be32_to_cpup(pos), be32_to_cpup(pos + 1));
|
|
break;
|
|
case 2:
|
|
printk(KERN_DEFAULT " %08x %08x %08x\n",
|
|
be32_to_cpup(pos), be32_to_cpup(pos + 1),
|
|
be32_to_cpup(pos + 2));
|
|
break;
|
|
default:
|
|
printk(KERN_DEFAULT " %08x %08x %08x %08x\n",
|
|
be32_to_cpup(pos), be32_to_cpup(pos + 1),
|
|
be32_to_cpup(pos + 2), be32_to_cpup(pos + 3));
|
|
}
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(_nfs_display_fhandle);
|
|
#endif
|
|
|
|
/**
|
|
* nfs_inode_attrs_cmp_generic - compare attributes
|
|
* @fattr: attributes
|
|
* @inode: pointer to inode
|
|
*
|
|
* Attempt to divine whether or not an RPC call reply carrying stale
|
|
* attributes got scheduled after another call carrying updated ones.
|
|
* Note also the check for wraparound of 'attr_gencount'
|
|
*
|
|
* The function returns '1' if it thinks the attributes in @fattr are
|
|
* more recent than the ones cached in @inode. Otherwise it returns
|
|
* the value '0'.
|
|
*/
|
|
static int nfs_inode_attrs_cmp_generic(const struct nfs_fattr *fattr,
|
|
const struct inode *inode)
|
|
{
|
|
unsigned long attr_gencount = NFS_I(inode)->attr_gencount;
|
|
|
|
return (long)(fattr->gencount - attr_gencount) > 0 ||
|
|
(long)(attr_gencount - nfs_read_attr_generation_counter()) > 0;
|
|
}
|
|
|
|
/**
|
|
* nfs_inode_attrs_cmp_monotonic - compare attributes
|
|
* @fattr: attributes
|
|
* @inode: pointer to inode
|
|
*
|
|
* Attempt to divine whether or not an RPC call reply carrying stale
|
|
* attributes got scheduled after another call carrying updated ones.
|
|
*
|
|
* We assume that the server observes monotonic semantics for
|
|
* the change attribute, so a larger value means that the attributes in
|
|
* @fattr are more recent, in which case the function returns the
|
|
* value '1'.
|
|
* A return value of '0' indicates no measurable change
|
|
* A return value of '-1' means that the attributes in @inode are
|
|
* more recent.
|
|
*/
|
|
static int nfs_inode_attrs_cmp_monotonic(const struct nfs_fattr *fattr,
|
|
const struct inode *inode)
|
|
{
|
|
s64 diff = fattr->change_attr - inode_peek_iversion_raw(inode);
|
|
if (diff > 0)
|
|
return 1;
|
|
return diff == 0 ? 0 : -1;
|
|
}
|
|
|
|
/**
|
|
* nfs_inode_attrs_cmp_strict_monotonic - compare attributes
|
|
* @fattr: attributes
|
|
* @inode: pointer to inode
|
|
*
|
|
* Attempt to divine whether or not an RPC call reply carrying stale
|
|
* attributes got scheduled after another call carrying updated ones.
|
|
*
|
|
* We assume that the server observes strictly monotonic semantics for
|
|
* the change attribute, so a larger value means that the attributes in
|
|
* @fattr are more recent, in which case the function returns the
|
|
* value '1'.
|
|
* A return value of '-1' means that the attributes in @inode are
|
|
* more recent or unchanged.
|
|
*/
|
|
static int nfs_inode_attrs_cmp_strict_monotonic(const struct nfs_fattr *fattr,
|
|
const struct inode *inode)
|
|
{
|
|
return nfs_inode_attrs_cmp_monotonic(fattr, inode) > 0 ? 1 : -1;
|
|
}
|
|
|
|
/**
|
|
* nfs_inode_attrs_cmp - compare attributes
|
|
* @fattr: attributes
|
|
* @inode: pointer to inode
|
|
*
|
|
* This function returns '1' if it thinks the attributes in @fattr are
|
|
* more recent than the ones cached in @inode. It returns '-1' if
|
|
* the attributes in @inode are more recent than the ones in @fattr,
|
|
* and it returns 0 if not sure.
|
|
*/
|
|
static int nfs_inode_attrs_cmp(const struct nfs_fattr *fattr,
|
|
const struct inode *inode)
|
|
{
|
|
if (nfs_inode_attrs_cmp_generic(fattr, inode) > 0)
|
|
return 1;
|
|
switch (NFS_SERVER(inode)->change_attr_type) {
|
|
case NFS4_CHANGE_TYPE_IS_UNDEFINED:
|
|
break;
|
|
case NFS4_CHANGE_TYPE_IS_TIME_METADATA:
|
|
if (!(fattr->valid & NFS_ATTR_FATTR_CHANGE))
|
|
break;
|
|
return nfs_inode_attrs_cmp_monotonic(fattr, inode);
|
|
default:
|
|
if (!(fattr->valid & NFS_ATTR_FATTR_CHANGE))
|
|
break;
|
|
return nfs_inode_attrs_cmp_strict_monotonic(fattr, inode);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* nfs_inode_finish_partial_attr_update - complete a previous inode update
|
|
* @fattr: attributes
|
|
* @inode: pointer to inode
|
|
*
|
|
* Returns '1' if the last attribute update left the inode cached
|
|
* attributes in a partially unrevalidated state, and @fattr
|
|
* matches the change attribute of that partial update.
|
|
* Otherwise returns '0'.
|
|
*/
|
|
static int nfs_inode_finish_partial_attr_update(const struct nfs_fattr *fattr,
|
|
const struct inode *inode)
|
|
{
|
|
const unsigned long check_valid =
|
|
NFS_INO_INVALID_ATIME | NFS_INO_INVALID_CTIME |
|
|
NFS_INO_INVALID_MTIME | NFS_INO_INVALID_SIZE |
|
|
NFS_INO_INVALID_BLOCKS | NFS_INO_INVALID_OTHER |
|
|
NFS_INO_INVALID_NLINK;
|
|
unsigned long cache_validity = NFS_I(inode)->cache_validity;
|
|
enum nfs4_change_attr_type ctype = NFS_SERVER(inode)->change_attr_type;
|
|
|
|
if (ctype != NFS4_CHANGE_TYPE_IS_UNDEFINED &&
|
|
!(cache_validity & NFS_INO_INVALID_CHANGE) &&
|
|
(cache_validity & check_valid) != 0 &&
|
|
(fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
|
|
nfs_inode_attrs_cmp_monotonic(fattr, inode) == 0)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static void nfs_ooo_merge(struct nfs_inode *nfsi,
|
|
u64 start, u64 end)
|
|
{
|
|
int i, cnt;
|
|
|
|
if (nfsi->cache_validity & NFS_INO_DATA_INVAL_DEFER)
|
|
/* No point merging anything */
|
|
return;
|
|
|
|
if (!nfsi->ooo) {
|
|
nfsi->ooo = kmalloc(sizeof(*nfsi->ooo), GFP_ATOMIC);
|
|
if (!nfsi->ooo) {
|
|
nfsi->cache_validity |= NFS_INO_DATA_INVAL_DEFER;
|
|
return;
|
|
}
|
|
nfsi->ooo->cnt = 0;
|
|
}
|
|
|
|
/* add this range, merging if possible */
|
|
cnt = nfsi->ooo->cnt;
|
|
for (i = 0; i < cnt; i++) {
|
|
if (end == nfsi->ooo->gap[i].start)
|
|
end = nfsi->ooo->gap[i].end;
|
|
else if (start == nfsi->ooo->gap[i].end)
|
|
start = nfsi->ooo->gap[i].start;
|
|
else
|
|
continue;
|
|
/* Remove 'i' from table and loop to insert the new range */
|
|
cnt -= 1;
|
|
nfsi->ooo->gap[i] = nfsi->ooo->gap[cnt];
|
|
i = -1;
|
|
}
|
|
if (start != end) {
|
|
if (cnt >= ARRAY_SIZE(nfsi->ooo->gap)) {
|
|
nfsi->cache_validity |= NFS_INO_DATA_INVAL_DEFER;
|
|
kfree(nfsi->ooo);
|
|
nfsi->ooo = NULL;
|
|
return;
|
|
}
|
|
nfsi->ooo->gap[cnt].start = start;
|
|
nfsi->ooo->gap[cnt].end = end;
|
|
cnt += 1;
|
|
}
|
|
nfsi->ooo->cnt = cnt;
|
|
}
|
|
|
|
static void nfs_ooo_record(struct nfs_inode *nfsi,
|
|
struct nfs_fattr *fattr)
|
|
{
|
|
/* This reply was out-of-order, so record in the
|
|
* pre/post change id, possibly cancelling
|
|
* gaps created when iversion was jumpped forward.
|
|
*/
|
|
if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) &&
|
|
(fattr->valid & NFS_ATTR_FATTR_PRECHANGE))
|
|
nfs_ooo_merge(nfsi,
|
|
fattr->change_attr,
|
|
fattr->pre_change_attr);
|
|
}
|
|
|
|
static int nfs_refresh_inode_locked(struct inode *inode,
|
|
struct nfs_fattr *fattr)
|
|
{
|
|
int attr_cmp = nfs_inode_attrs_cmp(fattr, inode);
|
|
int ret = 0;
|
|
|
|
trace_nfs_refresh_inode_enter(inode);
|
|
|
|
if (attr_cmp > 0 || nfs_inode_finish_partial_attr_update(fattr, inode))
|
|
ret = nfs_update_inode(inode, fattr);
|
|
else {
|
|
nfs_ooo_record(NFS_I(inode), fattr);
|
|
|
|
if (attr_cmp == 0)
|
|
ret = nfs_check_inode_attributes(inode, fattr);
|
|
}
|
|
|
|
trace_nfs_refresh_inode_exit(inode, ret);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
int status;
|
|
|
|
if ((fattr->valid & NFS_ATTR_FATTR) == 0)
|
|
return 0;
|
|
spin_lock(&inode->i_lock);
|
|
status = nfs_refresh_inode_locked(inode, fattr);
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
return status;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_refresh_inode);
|
|
|
|
static int nfs_post_op_update_inode_locked(struct inode *inode,
|
|
struct nfs_fattr *fattr, unsigned int invalid)
|
|
{
|
|
if (S_ISDIR(inode->i_mode))
|
|
invalid |= NFS_INO_INVALID_DATA;
|
|
nfs_set_cache_invalid(inode, invalid);
|
|
if ((fattr->valid & NFS_ATTR_FATTR) == 0)
|
|
return 0;
|
|
return nfs_refresh_inode_locked(inode, fattr);
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
int status;
|
|
|
|
spin_lock(&inode->i_lock);
|
|
nfs_fattr_set_barrier(fattr);
|
|
status = nfs_post_op_update_inode_locked(inode, fattr,
|
|
NFS_INO_INVALID_CHANGE
|
|
| NFS_INO_INVALID_CTIME
|
|
| NFS_INO_REVAL_FORCED);
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
return status;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_post_op_update_inode);
|
|
|
|
/**
|
|
* nfs_post_op_update_inode_force_wcc_locked - 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. Fake up
|
|
* weak cache consistency data, if none exist.
|
|
*
|
|
* This function is mainly designed to be used by the ->write_done() functions.
|
|
*/
|
|
int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr)
|
|
{
|
|
int attr_cmp = nfs_inode_attrs_cmp(fattr, inode);
|
|
int status;
|
|
|
|
/* Don't do a WCC update if these attributes are already stale */
|
|
if (attr_cmp < 0)
|
|
return 0;
|
|
if ((fattr->valid & NFS_ATTR_FATTR) == 0 || !attr_cmp) {
|
|
/* Record the pre/post change info before clearing PRECHANGE */
|
|
nfs_ooo_record(NFS_I(inode), fattr);
|
|
fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
|
|
| NFS_ATTR_FATTR_PRESIZE
|
|
| NFS_ATTR_FATTR_PREMTIME
|
|
| NFS_ATTR_FATTR_PRECTIME);
|
|
goto out_noforce;
|
|
}
|
|
if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
|
|
(fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
|
|
fattr->pre_change_attr = inode_peek_iversion_raw(inode);
|
|
fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
|
|
}
|
|
if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
|
|
(fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
|
|
fattr->pre_ctime = inode_get_ctime(inode);
|
|
fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
|
|
}
|
|
if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
|
|
(fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
|
|
fattr->pre_mtime = inode_get_mtime(inode);
|
|
fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
|
|
}
|
|
if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
|
|
(fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
|
|
fattr->pre_size = i_size_read(inode);
|
|
fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
|
|
}
|
|
out_noforce:
|
|
status = nfs_post_op_update_inode_locked(inode, fattr,
|
|
NFS_INO_INVALID_CHANGE
|
|
| NFS_INO_INVALID_CTIME
|
|
| NFS_INO_INVALID_MTIME
|
|
| NFS_INO_INVALID_BLOCKS);
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* nfs_post_op_update_inode_force_wcc - 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. Fake up
|
|
* weak cache consistency data, if none exist.
|
|
*
|
|
* This function is mainly designed to be used by the ->write_done() functions.
|
|
*/
|
|
int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
|
|
{
|
|
int status;
|
|
|
|
spin_lock(&inode->i_lock);
|
|
nfs_fattr_set_barrier(fattr);
|
|
status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr);
|
|
spin_unlock(&inode->i_lock);
|
|
return status;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc);
|
|
|
|
|
|
/*
|
|
* 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 = NFS_SERVER(inode);
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
loff_t cur_isize, new_isize;
|
|
u64 fattr_supported = server->fattr_valid;
|
|
unsigned long invalid = 0;
|
|
unsigned long now = jiffies;
|
|
unsigned long save_cache_validity;
|
|
bool have_writers = nfs_file_has_buffered_writers(nfsi);
|
|
bool cache_revalidated = true;
|
|
bool attr_changed = false;
|
|
bool have_delegation;
|
|
|
|
dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
|
|
__func__, inode->i_sb->s_id, inode->i_ino,
|
|
nfs_display_fhandle_hash(NFS_FH(inode)),
|
|
atomic_read(&inode->i_count), fattr->valid);
|
|
|
|
if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) {
|
|
/* Only a mounted-on-fileid? Just exit */
|
|
if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
|
|
return 0;
|
|
/* Has the inode gone and changed behind our back? */
|
|
} else if (nfsi->fileid != fattr->fileid) {
|
|
/* Is this perhaps the mounted-on fileid? */
|
|
if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) &&
|
|
nfsi->fileid == fattr->mounted_on_fileid)
|
|
return 0;
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* Make sure the inode's type hasn't changed.
|
|
*/
|
|
if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && inode_wrong_type(inode, fattr->mode)) {
|
|
/*
|
|
* Big trouble! The inode has become a different object.
|
|
*/
|
|
printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n",
|
|
__func__, inode->i_ino, inode->i_mode, fattr->mode);
|
|
goto out_err;
|
|
}
|
|
|
|
/* Update the fsid? */
|
|
if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
|
|
!nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
|
|
!IS_AUTOMOUNT(inode))
|
|
server->fsid = fattr->fsid;
|
|
|
|
/* Save the delegation state before clearing cache_validity */
|
|
have_delegation = nfs_have_delegated_attributes(inode);
|
|
|
|
/*
|
|
* Update the read time so we don't revalidate too often.
|
|
*/
|
|
nfsi->read_cache_jiffies = fattr->time_start;
|
|
|
|
save_cache_validity = nfsi->cache_validity;
|
|
nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
|
|
| NFS_INO_INVALID_ATIME
|
|
| NFS_INO_REVAL_FORCED
|
|
| NFS_INO_INVALID_BLOCKS);
|
|
|
|
/* Do atomic weak cache consistency updates */
|
|
nfs_wcc_update_inode(inode, fattr);
|
|
|
|
if (pnfs_layoutcommit_outstanding(inode)) {
|
|
nfsi->cache_validity |=
|
|
save_cache_validity &
|
|
(NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_CTIME |
|
|
NFS_INO_INVALID_MTIME | NFS_INO_INVALID_SIZE |
|
|
NFS_INO_INVALID_BLOCKS);
|
|
cache_revalidated = false;
|
|
}
|
|
|
|
/* More cache consistency checks */
|
|
if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
|
|
if (!have_writers && nfsi->ooo && nfsi->ooo->cnt == 1 &&
|
|
nfsi->ooo->gap[0].end == inode_peek_iversion_raw(inode)) {
|
|
/* There is one remaining gap that hasn't been
|
|
* merged into iversion - do that now.
|
|
*/
|
|
inode_set_iversion_raw(inode, nfsi->ooo->gap[0].start);
|
|
kfree(nfsi->ooo);
|
|
nfsi->ooo = NULL;
|
|
}
|
|
if (!inode_eq_iversion_raw(inode, fattr->change_attr)) {
|
|
/* Could it be a race with writeback? */
|
|
if (!(have_writers || have_delegation)) {
|
|
invalid |= NFS_INO_INVALID_DATA
|
|
| NFS_INO_INVALID_ACCESS
|
|
| NFS_INO_INVALID_ACL
|
|
| NFS_INO_INVALID_XATTR;
|
|
/* Force revalidate of all attributes */
|
|
save_cache_validity |= NFS_INO_INVALID_CTIME
|
|
| NFS_INO_INVALID_MTIME
|
|
| NFS_INO_INVALID_SIZE
|
|
| NFS_INO_INVALID_BLOCKS
|
|
| NFS_INO_INVALID_NLINK
|
|
| NFS_INO_INVALID_MODE
|
|
| NFS_INO_INVALID_OTHER;
|
|
if (S_ISDIR(inode->i_mode))
|
|
nfs_force_lookup_revalidate(inode);
|
|
attr_changed = true;
|
|
dprintk("NFS: change_attr change on server for file %s/%ld\n",
|
|
inode->i_sb->s_id,
|
|
inode->i_ino);
|
|
} else if (!have_delegation) {
|
|
nfs_ooo_record(nfsi, fattr);
|
|
nfs_ooo_merge(nfsi, inode_peek_iversion_raw(inode),
|
|
fattr->change_attr);
|
|
}
|
|
inode_set_iversion_raw(inode, fattr->change_attr);
|
|
}
|
|
} else {
|
|
nfsi->cache_validity |=
|
|
save_cache_validity & NFS_INO_INVALID_CHANGE;
|
|
if (!have_delegation ||
|
|
(nfsi->cache_validity & NFS_INO_INVALID_CHANGE) != 0)
|
|
cache_revalidated = false;
|
|
}
|
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_MTIME)
|
|
inode_set_mtime_to_ts(inode, fattr->mtime);
|
|
else if (fattr_supported & NFS_ATTR_FATTR_MTIME)
|
|
nfsi->cache_validity |=
|
|
save_cache_validity & NFS_INO_INVALID_MTIME;
|
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_CTIME)
|
|
inode_set_ctime_to_ts(inode, fattr->ctime);
|
|
else if (fattr_supported & NFS_ATTR_FATTR_CTIME)
|
|
nfsi->cache_validity |=
|
|
save_cache_validity & NFS_INO_INVALID_CTIME;
|
|
|
|
/* Check if our cached file size is stale */
|
|
if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
|
|
new_isize = nfs_size_to_loff_t(fattr->size);
|
|
cur_isize = i_size_read(inode);
|
|
if (new_isize != cur_isize && !have_delegation) {
|
|
/* Do we perhaps have any outstanding writes, or has
|
|
* the file grown beyond our last write? */
|
|
if (!nfs_have_writebacks(inode) || new_isize > cur_isize) {
|
|
trace_nfs_size_update(inode, new_isize);
|
|
i_size_write(inode, new_isize);
|
|
if (!have_writers)
|
|
invalid |= NFS_INO_INVALID_DATA;
|
|
}
|
|
}
|
|
if (new_isize == 0 &&
|
|
!(fattr->valid & (NFS_ATTR_FATTR_SPACE_USED |
|
|
NFS_ATTR_FATTR_BLOCKS_USED))) {
|
|
fattr->du.nfs3.used = 0;
|
|
fattr->valid |= NFS_ATTR_FATTR_SPACE_USED;
|
|
}
|
|
} else
|
|
nfsi->cache_validity |=
|
|
save_cache_validity & NFS_INO_INVALID_SIZE;
|
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_ATIME)
|
|
inode_set_atime_to_ts(inode, fattr->atime);
|
|
else if (fattr_supported & NFS_ATTR_FATTR_ATIME)
|
|
nfsi->cache_validity |=
|
|
save_cache_validity & NFS_INO_INVALID_ATIME;
|
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_MODE) {
|
|
if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
|
|
umode_t newmode = inode->i_mode & S_IFMT;
|
|
newmode |= fattr->mode & S_IALLUGO;
|
|
inode->i_mode = newmode;
|
|
invalid |= NFS_INO_INVALID_ACCESS
|
|
| NFS_INO_INVALID_ACL;
|
|
}
|
|
} else if (fattr_supported & NFS_ATTR_FATTR_MODE)
|
|
nfsi->cache_validity |=
|
|
save_cache_validity & NFS_INO_INVALID_MODE;
|
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
|
|
if (!uid_eq(inode->i_uid, fattr->uid)) {
|
|
invalid |= NFS_INO_INVALID_ACCESS
|
|
| NFS_INO_INVALID_ACL;
|
|
inode->i_uid = fattr->uid;
|
|
}
|
|
} else if (fattr_supported & NFS_ATTR_FATTR_OWNER)
|
|
nfsi->cache_validity |=
|
|
save_cache_validity & NFS_INO_INVALID_OTHER;
|
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
|
|
if (!gid_eq(inode->i_gid, fattr->gid)) {
|
|
invalid |= NFS_INO_INVALID_ACCESS
|
|
| NFS_INO_INVALID_ACL;
|
|
inode->i_gid = fattr->gid;
|
|
}
|
|
} else if (fattr_supported & NFS_ATTR_FATTR_GROUP)
|
|
nfsi->cache_validity |=
|
|
save_cache_validity & NFS_INO_INVALID_OTHER;
|
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
|
|
if (inode->i_nlink != fattr->nlink)
|
|
set_nlink(inode, fattr->nlink);
|
|
} else if (fattr_supported & NFS_ATTR_FATTR_NLINK)
|
|
nfsi->cache_validity |=
|
|
save_cache_validity & NFS_INO_INVALID_NLINK;
|
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
|
|
/*
|
|
* report the blocks in 512byte units
|
|
*/
|
|
inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
|
|
} else if (fattr_supported & NFS_ATTR_FATTR_SPACE_USED)
|
|
nfsi->cache_validity |=
|
|
save_cache_validity & NFS_INO_INVALID_BLOCKS;
|
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
|
|
inode->i_blocks = fattr->du.nfs2.blocks;
|
|
else if (fattr_supported & NFS_ATTR_FATTR_BLOCKS_USED)
|
|
nfsi->cache_validity |=
|
|
save_cache_validity & NFS_INO_INVALID_BLOCKS;
|
|
|
|
/* Update attrtimeo value if we're out of the unstable period */
|
|
if (attr_changed) {
|
|
nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
|
|
nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
|
|
nfsi->attrtimeo_timestamp = now;
|
|
/* Set barrier to be more recent than all outstanding updates */
|
|
nfsi->attr_gencount = nfs_inc_attr_generation_counter();
|
|
} else {
|
|
if (cache_revalidated) {
|
|
if (!time_in_range_open(now, nfsi->attrtimeo_timestamp,
|
|
nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
|
|
nfsi->attrtimeo <<= 1;
|
|
if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode))
|
|
nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
|
|
}
|
|
nfsi->attrtimeo_timestamp = now;
|
|
}
|
|
/* Set the barrier to be more recent than this fattr */
|
|
if ((long)(fattr->gencount - nfsi->attr_gencount) > 0)
|
|
nfsi->attr_gencount = fattr->gencount;
|
|
}
|
|
|
|
/* 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;
|
|
nfs_set_cache_invalid(inode, invalid);
|
|
|
|
return 0;
|
|
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_set_inode_stale_locked(inode);
|
|
return -ESTALE;
|
|
}
|
|
|
|
struct inode *nfs_alloc_inode(struct super_block *sb)
|
|
{
|
|
struct nfs_inode *nfsi;
|
|
nfsi = alloc_inode_sb(sb, nfs_inode_cachep, GFP_KERNEL);
|
|
if (!nfsi)
|
|
return NULL;
|
|
nfsi->flags = 0UL;
|
|
nfsi->cache_validity = 0UL;
|
|
nfsi->ooo = NULL;
|
|
#if IS_ENABLED(CONFIG_NFS_V4)
|
|
nfsi->nfs4_acl = NULL;
|
|
#endif /* CONFIG_NFS_V4 */
|
|
#ifdef CONFIG_NFS_V4_2
|
|
nfsi->xattr_cache = NULL;
|
|
#endif
|
|
nfs_netfs_inode_init(nfsi);
|
|
|
|
return &nfsi->vfs_inode;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_alloc_inode);
|
|
|
|
void nfs_free_inode(struct inode *inode)
|
|
{
|
|
kfree(NFS_I(inode)->ooo);
|
|
kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_free_inode);
|
|
|
|
static inline void nfs4_init_once(struct nfs_inode *nfsi)
|
|
{
|
|
#if IS_ENABLED(CONFIG_NFS_V4)
|
|
INIT_LIST_HEAD(&nfsi->open_states);
|
|
nfsi->delegation = NULL;
|
|
init_rwsem(&nfsi->rwsem);
|
|
nfsi->layout = NULL;
|
|
#endif
|
|
}
|
|
|
|
static void init_once(void *foo)
|
|
{
|
|
struct nfs_inode *nfsi = foo;
|
|
|
|
inode_init_once(&nfsi->vfs_inode);
|
|
INIT_LIST_HEAD(&nfsi->open_files);
|
|
INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
|
|
INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
|
|
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|SLAB_ACCOUNT),
|
|
init_once);
|
|
if (nfs_inode_cachep == NULL)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void nfs_destroy_inodecache(void)
|
|
{
|
|
/*
|
|
* Make sure all delayed rcu free inodes are flushed before we
|
|
* destroy cache.
|
|
*/
|
|
rcu_barrier();
|
|
kmem_cache_destroy(nfs_inode_cachep);
|
|
}
|
|
|
|
struct workqueue_struct *nfsiod_workqueue;
|
|
EXPORT_SYMBOL_GPL(nfsiod_workqueue);
|
|
|
|
/*
|
|
* start up the nfsiod workqueue
|
|
*/
|
|
static int nfsiod_start(void)
|
|
{
|
|
struct workqueue_struct *wq;
|
|
dprintk("RPC: creating workqueue nfsiod\n");
|
|
wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM | WQ_UNBOUND, 0);
|
|
if (wq == NULL)
|
|
return -ENOMEM;
|
|
nfsiod_workqueue = wq;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Destroy the nfsiod workqueue
|
|
*/
|
|
static void nfsiod_stop(void)
|
|
{
|
|
struct workqueue_struct *wq;
|
|
|
|
wq = nfsiod_workqueue;
|
|
if (wq == NULL)
|
|
return;
|
|
nfsiod_workqueue = NULL;
|
|
destroy_workqueue(wq);
|
|
}
|
|
|
|
unsigned int nfs_net_id;
|
|
EXPORT_SYMBOL_GPL(nfs_net_id);
|
|
|
|
static int nfs_net_init(struct net *net)
|
|
{
|
|
nfs_clients_init(net);
|
|
return nfs_fs_proc_net_init(net);
|
|
}
|
|
|
|
static void nfs_net_exit(struct net *net)
|
|
{
|
|
nfs_fs_proc_net_exit(net);
|
|
nfs_clients_exit(net);
|
|
}
|
|
|
|
static struct pernet_operations nfs_net_ops = {
|
|
.init = nfs_net_init,
|
|
.exit = nfs_net_exit,
|
|
.id = &nfs_net_id,
|
|
.size = sizeof(struct nfs_net),
|
|
};
|
|
|
|
/*
|
|
* Initialize NFS
|
|
*/
|
|
static int __init init_nfs_fs(void)
|
|
{
|
|
int err;
|
|
|
|
err = nfs_sysfs_init();
|
|
if (err < 0)
|
|
goto out10;
|
|
|
|
err = register_pernet_subsys(&nfs_net_ops);
|
|
if (err < 0)
|
|
goto out9;
|
|
|
|
err = nfsiod_start();
|
|
if (err)
|
|
goto out7;
|
|
|
|
err = nfs_fs_proc_init();
|
|
if (err)
|
|
goto out6;
|
|
|
|
err = nfs_init_nfspagecache();
|
|
if (err)
|
|
goto out5;
|
|
|
|
err = nfs_init_inodecache();
|
|
if (err)
|
|
goto out4;
|
|
|
|
err = nfs_init_readpagecache();
|
|
if (err)
|
|
goto out3;
|
|
|
|
err = nfs_init_writepagecache();
|
|
if (err)
|
|
goto out2;
|
|
|
|
err = nfs_init_directcache();
|
|
if (err)
|
|
goto out1;
|
|
|
|
rpc_proc_register(&init_net, &nfs_rpcstat);
|
|
|
|
err = register_nfs_fs();
|
|
if (err)
|
|
goto out0;
|
|
|
|
return 0;
|
|
out0:
|
|
rpc_proc_unregister(&init_net, "nfs");
|
|
nfs_destroy_directcache();
|
|
out1:
|
|
nfs_destroy_writepagecache();
|
|
out2:
|
|
nfs_destroy_readpagecache();
|
|
out3:
|
|
nfs_destroy_inodecache();
|
|
out4:
|
|
nfs_destroy_nfspagecache();
|
|
out5:
|
|
nfs_fs_proc_exit();
|
|
out6:
|
|
nfsiod_stop();
|
|
out7:
|
|
unregister_pernet_subsys(&nfs_net_ops);
|
|
out9:
|
|
nfs_sysfs_exit();
|
|
out10:
|
|
return err;
|
|
}
|
|
|
|
static void __exit exit_nfs_fs(void)
|
|
{
|
|
nfs_destroy_directcache();
|
|
nfs_destroy_writepagecache();
|
|
nfs_destroy_readpagecache();
|
|
nfs_destroy_inodecache();
|
|
nfs_destroy_nfspagecache();
|
|
unregister_pernet_subsys(&nfs_net_ops);
|
|
rpc_proc_unregister(&init_net, "nfs");
|
|
unregister_nfs_fs();
|
|
nfs_fs_proc_exit();
|
|
nfsiod_stop();
|
|
nfs_sysfs_exit();
|
|
}
|
|
|
|
/* Not quite true; I just maintain it */
|
|
MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
|
|
MODULE_LICENSE("GPL");
|
|
module_param(enable_ino64, bool, 0644);
|
|
|
|
module_init(init_nfs_fs)
|
|
module_exit(exit_nfs_fs)
|