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Code Issues Releases Wiki Activity

NFSD: Move fill_pre_wcc() and fill_post_wcc()

Browse source 
These functions are related to file handle processing and have
nothing to do with XDR encoding or decoding. Also they are no longer
NFSv3-specific. As a clean-up, move their definitions to a more
appropriate location. WCC is also an NFSv3-specific term, so rename
them as general-purpose helpers.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2021-12-24 14:36:49 -05:00
parent 58f258f652
commit fcb5e3fa01
5 changed files with 96 additions and 75 deletions
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55
fs/nfsd/nfs3xdr.c
View file

@ -487,61 +487,6 @@ svcxdr_encode_wcc_data(struct svc_rqst *rqstp, struct xdr_stream *xdr,
return true;
}
/*
* Fill in the pre_op attr for the wcc data
*/
void fill_pre_wcc(struct svc_fh *fhp)
{
struct inode *inode;
struct kstat stat;
bool v4 = (fhp->fh_maxsize == NFS4_FHSIZE);
__be32 err;
if (fhp->fh_no_wcc || fhp->fh_pre_saved)
return;
inode = d_inode(fhp->fh_dentry);
err = fh_getattr(fhp, &stat);
if (err) {
/* Grab the times from inode anyway */
stat.mtime = inode->i_mtime;
stat.ctime = inode->i_ctime;
stat.size = inode->i_size;
}
if (v4)
fhp->fh_pre_change = nfsd4_change_attribute(&stat, inode);
fhp->fh_pre_mtime = stat.mtime;
fhp->fh_pre_ctime = stat.ctime;
fhp->fh_pre_size = stat.size;
fhp->fh_pre_saved = true;
}
/*
* Fill in the post_op attr for the wcc data
*/
void fill_post_wcc(struct svc_fh *fhp)
{
bool v4 = (fhp->fh_maxsize == NFS4_FHSIZE);
struct inode *inode = d_inode(fhp->fh_dentry);
__be32 err;
if (fhp->fh_no_wcc)
return;
if (fhp->fh_post_saved)
printk("nfsd: inode locked twice during operation.\n");
err = fh_getattr(fhp, &fhp->fh_post_attr);
if (err) {
fhp->fh_post_saved = false;
fhp->fh_post_attr.ctime = inode->i_ctime;
} else
fhp->fh_post_saved = true;
if (v4)
fhp->fh_post_change =
nfsd4_change_attribute(&fhp->fh_post_attr, inode);
}
/*
* XDR decode functions
*/

2
fs/nfsd/nfs4proc.c
View file

@ -2530,7 +2530,7 @@ nfsd4_proc_compound(struct svc_rqst *rqstp)
goto encode_op;
}
fh_clear_wcc(current_fh);
fh_clear_pre_post_attrs(current_fh);
/* If op is non-idempotent */
if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {

66
fs/nfsd/nfsfh.c
View file

@ -611,6 +611,70 @@ fh_update(struct svc_fh *fhp)
return nfserr_serverfault;
}
#ifdef CONFIG_NFSD_V3
/**
* fh_fill_pre_attrs - Fill in pre-op attributes
* @fhp: file handle to be updated
*
*/
void fh_fill_pre_attrs(struct svc_fh *fhp)
{
bool v4 = (fhp->fh_maxsize == NFS4_FHSIZE);
struct inode *inode;
struct kstat stat;
__be32 err;
if (fhp->fh_no_wcc || fhp->fh_pre_saved)
return;
inode = d_inode(fhp->fh_dentry);
err = fh_getattr(fhp, &stat);
if (err) {
/* Grab the times from inode anyway */
stat.mtime = inode->i_mtime;
stat.ctime = inode->i_ctime;
stat.size = inode->i_size;
}
if (v4)
fhp->fh_pre_change = nfsd4_change_attribute(&stat, inode);
fhp->fh_pre_mtime = stat.mtime;
fhp->fh_pre_ctime = stat.ctime;
fhp->fh_pre_size = stat.size;
fhp->fh_pre_saved = true;
}
/**
* fh_fill_post_attrs - Fill in post-op attributes
* @fhp: file handle to be updated
*
*/
void fh_fill_post_attrs(struct svc_fh *fhp)
{
bool v4 = (fhp->fh_maxsize == NFS4_FHSIZE);
struct inode *inode = d_inode(fhp->fh_dentry);
__be32 err;
if (fhp->fh_no_wcc)
return;
if (fhp->fh_post_saved)
printk("nfsd: inode locked twice during operation.\n");
err = fh_getattr(fhp, &fhp->fh_post_attr);
if (err) {
fhp->fh_post_saved = false;
fhp->fh_post_attr.ctime = inode->i_ctime;
} else
fhp->fh_post_saved = true;
if (v4)
fhp->fh_post_change =
nfsd4_change_attribute(&fhp->fh_post_attr, inode);
}
#endif /* CONFIG_NFSD_V3 */
/*
* Release a file handle.
*/
@ -623,7 +687,7 @@ fh_put(struct svc_fh *fhp)
fh_unlock(fhp);
fhp->fh_dentry = NULL;
dput(dentry);
fh_clear_wcc(fhp);
fh_clear_pre_post_attrs(fhp);
}
fh_drop_write(fhp);
if (exp) {

40
fs/nfsd/nfsfh.h
View file

@ -284,12 +284,13 @@ static inline u32 knfsd_fh_hash(const struct knfsd_fh *fh)
#endif
#ifdef CONFIG_NFSD_V3
/*
* The wcc data stored in current_fh should be cleared
* between compound ops.
/**
* fh_clear_pre_post_attrs - Reset pre/post attributes
* @fhp: file handle to be updated
*
*/
static inline void
fh_clear_wcc(struct svc_fh *fhp)
static inline void fh_clear_pre_post_attrs(struct svc_fh *fhp)
{
fhp->fh_post_saved = false;
fhp->fh_pre_saved = false;
@ -323,13 +324,24 @@ static inline u64 nfsd4_change_attribute(struct kstat *stat,
return time_to_chattr(&stat->ctime);
}
extern void fill_pre_wcc(struct svc_fh *fhp);
extern void fill_post_wcc(struct svc_fh *fhp);
#else
#define fh_clear_wcc(ignored)
#define fill_pre_wcc(ignored)
#define fill_post_wcc(notused)
#endif /* CONFIG_NFSD_V3 */
extern void fh_fill_pre_attrs(struct svc_fh *fhp);
extern void fh_fill_post_attrs(struct svc_fh *fhp);
#else /* !CONFIG_NFSD_V3 */
static inline void fh_clear_pre_post_attrs(struct svc_fh *fhp)
{
}
static inline void fh_fill_pre_attrs(struct svc_fh *fhp)
{
}
static inline void fh_fill_post_attrs(struct svc_fh *fhp)
{
}
#endif /* !CONFIG_NFSD_V3 */
/*
@ -355,7 +367,7 @@ fh_lock_nested(struct svc_fh *fhp, unsigned int subclass)
inode = d_inode(dentry);
inode_lock_nested(inode, subclass);
fill_pre_wcc(fhp);
fh_fill_pre_attrs(fhp);
fhp->fh_locked = true;
}
@ -372,7 +384,7 @@ static inline void
fh_unlock(struct svc_fh *fhp)
{
if (fhp->fh_locked) {
fill_post_wcc(fhp);
fh_fill_post_attrs(fhp);
inode_unlock(d_inode(fhp->fh_dentry));
fhp->fh_locked = false;
}

8
fs/nfsd/vfs.c
View file

@ -1755,8 +1755,8 @@ nfsd_rename(struct svc_rqst *rqstp, struct svc_fh *ffhp, char *fname, int flen,
* so do it by hand */
trap = lock_rename(tdentry, fdentry);
ffhp->fh_locked = tfhp->fh_locked = true;
fill_pre_wcc(ffhp);
fill_pre_wcc(tfhp);
fh_fill_pre_attrs(ffhp);
fh_fill_pre_attrs(tfhp);
odentry = lookup_one_len(fname, fdentry, flen);
host_err = PTR_ERR(odentry);
@ -1816,8 +1816,8 @@ nfsd_rename(struct svc_rqst *rqstp, struct svc_fh *ffhp, char *fname, int flen,
* were the same, so again we do it by hand.
*/
if (!close_cached) {
fill_post_wcc(ffhp);
fill_post_wcc(tfhp);
fh_fill_post_attrs(ffhp);
fh_fill_post_attrs(tfhp);
}
unlock_rename(tdentry, fdentry);
ffhp->fh_locked = tfhp->fh_locked = false;