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NFSv4.1 cache mdsthreshold values on OPEN

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Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Andy Adamson 2012-05-23 05:02:35 -04:00 committed by Trond Myklebust
parent 88034c3d88
commit 82be417aa3
5 changed files with 69 additions and 5 deletions
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2
fs/nfs/inode.c
View File

@ -641,6 +641,7 @@ struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f
nfs_init_lock_context(&ctx->lock_context);
ctx->lock_context.open_context = ctx;
INIT_LIST_HEAD(&ctx->list);
ctx->mdsthreshold = NULL;
return ctx;
}
@ -669,6 +670,7 @@ static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
put_rpccred(ctx->cred);
dput(ctx->dentry);
nfs_sb_deactive(sb);
kfree(ctx->mdsthreshold);
kfree(ctx);
}

38
fs/nfs/nfs4proc.c
View File

@ -1782,7 +1782,14 @@ static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct
/*
* Returns a referenced nfs4_state
*/
static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
static int _nfs4_do_open(struct inode *dir,
struct dentry *dentry,
fmode_t fmode,
int flags,
struct iattr *sattr,
struct rpc_cred *cred,
struct nfs4_state **res,
struct nfs4_threshold **ctx_th)
{
struct nfs4_state_owner *sp;
struct nfs4_state *state = NULL;
@ -1807,6 +1814,11 @@ static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode
if (opendata == NULL)
goto err_put_state_owner;
if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
if (!opendata->f_attr.mdsthreshold)
goto err_opendata_put;
}
if (dentry->d_inode != NULL)
opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
@ -1832,11 +1844,19 @@ static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode
nfs_setattr_update_inode(state->inode, sattr);
nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
}
if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
*ctx_th = opendata->f_attr.mdsthreshold;
else
kfree(opendata->f_attr.mdsthreshold);
opendata->f_attr.mdsthreshold = NULL;
nfs4_opendata_put(opendata);
nfs4_put_state_owner(sp);
*res = state;
return 0;
err_opendata_put:
kfree(opendata->f_attr.mdsthreshold);
nfs4_opendata_put(opendata);
err_put_state_owner:
nfs4_put_state_owner(sp);
@ -1846,14 +1866,21 @@ out_err:
}
static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
static struct nfs4_state *nfs4_do_open(struct inode *dir,
struct dentry *dentry,
fmode_t fmode,
int flags,
struct iattr *sattr,
struct rpc_cred *cred,
struct nfs4_threshold **ctx_th)
{
struct nfs4_exception exception = { };
struct nfs4_state *res;
int status;
do {
status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
&res, ctx_th);
if (status == 0)
break;
/* NOTE: BAD_SEQID means the server and client disagree about the
@ -2177,7 +2204,8 @@ nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags
struct nfs4_state *state;
/* Protect against concurrent sillydeletes */
state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
ctx->cred, &ctx->mdsthreshold);
if (IS_ERR(state))
return ERR_CAST(state);
ctx->state = state;
@ -2779,7 +2807,7 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
fmode = ctx->mode;
}
sattr->ia_mode &= ~current_umask();
state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
state = nfs4_do_open(dir, de, fmode, flags, sattr, cred, NULL);
d_drop(dentry);
if (IS_ERR(state)) {
status = PTR_ERR(state);

12
fs/nfs/pnfs.c
View File

@ -1630,3 +1630,15 @@ out_free:
kfree(data);
goto out;
}
struct nfs4_threshold *pnfs_mdsthreshold_alloc(void)
{
struct nfs4_threshold *thp;
thp = kzalloc(sizeof(*thp), GFP_NOFS);
if (!thp) {
dprintk("%s mdsthreshold allocation failed\n", __func__);
return NULL;
}
return thp;
}

21
fs/nfs/pnfs.h
View File

@ -227,6 +227,7 @@ int pnfs_read_done_resend_to_mds(struct inode *inode, struct list_head *head,
const struct nfs_pgio_completion_ops *compl_ops);
int pnfs_write_done_resend_to_mds(struct inode *inode, struct list_head *head,
const struct nfs_pgio_completion_ops *compl_ops);
struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
/* nfs4_deviceid_flags */
enum {
@ -360,6 +361,14 @@ static inline int pnfs_return_layout(struct inode *ino)
return 0;
}
static inline bool
pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
struct nfs_server *nfss)
{
return (dst && src && src->bm != 0 &&
nfss->pnfs_curr_ld->id == src->l_type);
}
#ifdef NFS_DEBUG
void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id);
#else
@ -485,6 +494,18 @@ static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync)
return 0;
}
static inline bool
pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
struct nfs_server *nfss)
{
return false;
}
static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void)
{
return NULL;
}
#endif /* CONFIG_NFS_V4_1 */
#endif /* FS_NFS_PNFS_H */

1
include/linux/nfs_fs.h
View File

@ -102,6 +102,7 @@ struct nfs_open_context {
int error;
struct list_head list;
struct nfs4_threshold *mdsthreshold;
};
struct nfs_open_dir_context {