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nfs: convert to new i_version API
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For NFS, we just use the "raw" API since the i_version is mostly
managed by the server. The exception there is when the client
holds a write delegation, but we only need to bump it once
there anyway to handle CB_GETATTR.

Tested-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
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@jtlayton
jtlayton committed Jan 29, 2018
1 parent ee73f9a commit 1eb5d98
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Showing 6 changed files with 26 additions and 23 deletions.
3 changes: 2 additions & 1 deletion fs/nfs/delegation.c
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,7 @@
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/iversion.h>

#include <linux/nfs4.h>
#include <linux/nfs_fs.h>
Expand Down Expand Up @@ -347,7 +348,7 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct
nfs4_stateid_copy(&delegation->stateid, &res->delegation);
delegation->type = res->delegation_type;
delegation->pagemod_limit = res->pagemod_limit;
delegation->change_attr = inode->i_version;
delegation->change_attr = inode_peek_iversion_raw(inode);
delegation->cred = get_rpccred(cred);
delegation->inode = inode;
delegation->flags = 1<<NFS_DELEGATION_REFERENCED;
Expand Down
5 changes: 3 additions & 2 deletions fs/nfs/fscache-index.c
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@
#include <linux/nfs_fs.h>
#include <linux/nfs_fs_sb.h>
#include <linux/in6.h>
#include <linux/iversion.h>

#include "internal.h"
#include "fscache.h"
Expand Down Expand Up @@ -211,7 +212,7 @@ static uint16_t nfs_fscache_inode_get_aux(const void *cookie_netfs_data,
auxdata.ctime = nfsi->vfs_inode.i_ctime;

if (NFS_SERVER(&nfsi->vfs_inode)->nfs_client->rpc_ops->version == 4)
auxdata.change_attr = nfsi->vfs_inode.i_version;
auxdata.change_attr = inode_peek_iversion_raw(&nfsi->vfs_inode);

if (bufmax > sizeof(auxdata))
bufmax = sizeof(auxdata);
Expand Down Expand Up @@ -243,7 +244,7 @@ enum fscache_checkaux nfs_fscache_inode_check_aux(void *cookie_netfs_data,
auxdata.ctime = nfsi->vfs_inode.i_ctime;

if (NFS_SERVER(&nfsi->vfs_inode)->nfs_client->rpc_ops->version == 4)
auxdata.change_attr = nfsi->vfs_inode.i_version;
auxdata.change_attr = inode_peek_iversion_raw(&nfsi->vfs_inode);

if (memcmp(data, &auxdata, datalen) != 0)
return FSCACHE_CHECKAUX_OBSOLETE;
Expand Down
18 changes: 9 additions & 9 deletions fs/nfs/inode.c
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Original file line number Diff line number Diff line change
Expand Up @@ -38,8 +38,8 @@
#include <linux/slab.h>
#include <linux/compat.h>
#include <linux/freezer.h>

#include <linux/uaccess.h>
#include <linux/iversion.h>

#include "nfs4_fs.h"
#include "callback.h"
Expand Down Expand Up @@ -483,7 +483,7 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, st
memset(&inode->i_atime, 0, sizeof(inode->i_atime));
memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
inode->i_version = 0;
inode_set_iversion_raw(inode, 0);
inode->i_size = 0;
clear_nlink(inode);
inode->i_uid = make_kuid(&init_user_ns, -2);
Expand All @@ -508,7 +508,7 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, st
else if (nfs_server_capable(inode, NFS_CAP_CTIME))
nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR);
if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
inode->i_version = fattr->change_attr;
inode_set_iversion_raw(inode, fattr->change_attr);
else
nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR
| NFS_INO_REVAL_PAGECACHE);
Expand Down Expand Up @@ -1289,8 +1289,8 @@ static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr

if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
&& (fattr->valid & NFS_ATTR_FATTR_CHANGE)
&& inode->i_version == fattr->pre_change_attr) {
inode->i_version = fattr->change_attr;
&& !inode_cmp_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);
ret |= NFS_INO_INVALID_ATTR;
Expand Down Expand Up @@ -1348,7 +1348,7 @@ static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fat

if (!nfs_file_has_buffered_writers(nfsi)) {
/* Verify a few of the more important attributes */
if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && inode->i_version != fattr->change_attr)
if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && inode_cmp_iversion_raw(inode, fattr->change_attr))
invalid |= NFS_INO_INVALID_ATTR | NFS_INO_REVAL_PAGECACHE;

if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime))
Expand Down Expand Up @@ -1642,7 +1642,7 @@ int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fa
}
if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
(fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
fattr->pre_change_attr = inode->i_version;
fattr->pre_change_attr = inode_peek_iversion_raw(inode);
fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
}
if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
Expand Down Expand Up @@ -1778,7 +1778,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)

/* More cache consistency checks */
if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
if (inode->i_version != fattr->change_attr) {
if (inode_cmp_iversion_raw(inode, fattr->change_attr)) {
dprintk("NFS: change_attr change on server for file %s/%ld\n",
inode->i_sb->s_id, inode->i_ino);
/* Could it be a race with writeback? */
Expand All @@ -1790,7 +1790,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
if (S_ISDIR(inode->i_mode))
nfs_force_lookup_revalidate(inode);
}
inode->i_version = fattr->change_attr;
inode_set_iversion_raw(inode, fattr->change_attr);
}
} else {
nfsi->cache_validity |= save_cache_validity;
Expand Down
10 changes: 6 additions & 4 deletions fs/nfs/nfs4proc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,7 @@
#include <linux/xattr.h>
#include <linux/utsname.h>
#include <linux/freezer.h>
#include <linux/iversion.h>

#include "nfs4_fs.h"
#include "delegation.h"
Expand Down Expand Up @@ -1045,16 +1046,16 @@ static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,

spin_lock(&dir->i_lock);
nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
if (cinfo->atomic && cinfo->before == dir->i_version) {
if (cinfo->atomic && cinfo->before == inode_peek_iversion_raw(dir)) {
nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
nfsi->attrtimeo_timestamp = jiffies;
} else {
nfs_force_lookup_revalidate(dir);
if (cinfo->before != dir->i_version)
if (cinfo->before != inode_peek_iversion_raw(dir))
nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
NFS_INO_INVALID_ACL;
}
dir->i_version = cinfo->after;
inode_set_iversion_raw(dir, cinfo->after);
nfsi->read_cache_jiffies = timestamp;
nfsi->attr_gencount = nfs_inc_attr_generation_counter();
nfs_fscache_invalidate(dir);
Expand Down Expand Up @@ -2454,7 +2455,8 @@ static int _nfs4_proc_open(struct nfs4_opendata *data)
data->file_created = true;
else if (o_res->cinfo.before != o_res->cinfo.after)
data->file_created = true;
if (data->file_created || dir->i_version != o_res->cinfo.after)
if (data->file_created ||
inode_peek_iversion_raw(dir) != o_res->cinfo.after)
update_changeattr(dir, &o_res->cinfo,
o_res->f_attr->time_start);
}
Expand Down
5 changes: 3 additions & 2 deletions fs/nfs/nfstrace.h
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@
#define _TRACE_NFS_H

#include <linux/tracepoint.h>
#include <linux/iversion.h>

#define nfs_show_file_type(ftype) \
__print_symbolic(ftype, \
Expand Down Expand Up @@ -61,7 +62,7 @@ DECLARE_EVENT_CLASS(nfs_inode_event,
__entry->dev = inode->i_sb->s_dev;
__entry->fileid = nfsi->fileid;
__entry->fhandle = nfs_fhandle_hash(&nfsi->fh);
__entry->version = inode->i_version;
__entry->version = inode_peek_iversion_raw(inode);
),

TP_printk(
Expand Down Expand Up @@ -100,7 +101,7 @@ DECLARE_EVENT_CLASS(nfs_inode_event_done,
__entry->fileid = nfsi->fileid;
__entry->fhandle = nfs_fhandle_hash(&nfsi->fh);
__entry->type = nfs_umode_to_dtype(inode->i_mode);
__entry->version = inode->i_version;
__entry->version = inode_peek_iversion_raw(inode);
__entry->size = i_size_read(inode);
__entry->nfsi_flags = nfsi->flags;
__entry->cache_validity = nfsi->cache_validity;
Expand Down
8 changes: 3 additions & 5 deletions fs/nfs/write.c
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@
#include <linux/export.h>
#include <linux/freezer.h>
#include <linux/wait.h>
#include <linux/iversion.h>

#include <linux/uaccess.h>

Expand Down Expand Up @@ -753,11 +754,8 @@ static void nfs_inode_add_request(struct inode *inode, struct nfs_page *req)
*/
spin_lock(&mapping->private_lock);
if (!nfs_have_writebacks(inode) &&
NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE)) {
spin_lock(&inode->i_lock);
inode->i_version++;
spin_unlock(&inode->i_lock);
}
NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE))
inode_inc_iversion_raw(inode);
if (likely(!PageSwapCache(req->wb_page))) {
set_bit(PG_MAPPED, &req->wb_flags);
SetPagePrivate(req->wb_page);
Expand Down

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