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nfsd: use DEFINE_SHOW_ATTRIBUTE to define nfsd_reply_cache_stats_fops

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Use DEFINE_SHOW_ATTRIBUTE helper macro to simplify the code.

nfsd_net is converted from seq_file->file instead of seq_file->private in
nfsd_reply_cache_stats_show().

Signed-off-by: ChenXiaoSong <chenxiaosong2@huawei.com>
[ cel: reduce line length ]
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
ChenXiaoSong 2022-09-23 00:31:55 +08:00 committed by Chuck Lever
parent 1d7f6b302b
commit 64776611a0
3 changed files with 7 additions and 18 deletions
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2
fs/nfsd/cache.h
View File

@ -84,6 +84,6 @@ int nfsd_reply_cache_init(struct nfsd_net *);
void nfsd_reply_cache_shutdown(struct nfsd_net *);
int nfsd_cache_lookup(struct svc_rqst *);
void nfsd_cache_update(struct svc_rqst *, int, __be32 *);
int nfsd_reply_cache_stats_open(struct inode *, struct file *);
int nfsd_reply_cache_stats_show(struct seq_file *m, void *v);
#endif /* NFSCACHE_H */

13
fs/nfsd/nfscache.c
View File

@ -604,9 +604,10 @@ nfsd_cache_append(struct svc_rqst *rqstp, struct kvec *data)
* scraping this file for info should test the labels to ensure they're
* getting the correct field.
*/
static int nfsd_reply_cache_stats_show(struct seq_file *m, void *v)
int nfsd_reply_cache_stats_show(struct seq_file *m, void *v)
{
struct nfsd_net *nn = m->private;
struct nfsd_net *nn = net_generic(file_inode(m->file)->i_sb->s_fs_info,
nfsd_net_id);
seq_printf(m, "max entries: %u\n", nn->max_drc_entries);
seq_printf(m, "num entries: %u\n",
@ -626,11 +627,3 @@ static int nfsd_reply_cache_stats_show(struct seq_file *m, void *v)
seq_printf(m, "cachesize at longest: %u\n", nn->longest_chain_cachesize);
return 0;
}
int nfsd_reply_cache_stats_open(struct inode *inode, struct file *file)
{
struct nfsd_net *nn = net_generic(file_inode(file)->i_sb->s_fs_info,
nfsd_net_id);
return single_open(file, nfsd_reply_cache_stats_show, nn);
}

10
fs/nfsd/nfsctl.c
View File

@ -204,12 +204,7 @@ static const struct file_operations pool_stats_operations = {
.release = nfsd_pool_stats_release,
};
static const struct file_operations reply_cache_stats_operations = {
.open = nfsd_reply_cache_stats_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
DEFINE_SHOW_ATTRIBUTE(nfsd_reply_cache_stats);
static const struct file_operations filecache_ops = {
.open = nfsd_file_cache_stats_open,
@ -1354,7 +1349,8 @@ static int nfsd_fill_super(struct super_block *sb, struct fs_context *fc)
[NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
[NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
[NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO},
[NFSD_Reply_Cache_Stats] = {"reply_cache_stats", &reply_cache_stats_operations, S_IRUGO},
[NFSD_Reply_Cache_Stats] = {"reply_cache_stats",
&nfsd_reply_cache_stats_fops, S_IRUGO},
[NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
[NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
[NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},