filecache.c (867a448d587e7fa845bceaf4ee1c632448f2a9fa) filecache.c (b8962a9d8cc2d8c93362e2f684091c79f702f6f3)
1/*
2 * Open file cache.
3 *
4 * (c) 2015 - Jeff Layton <jeff.layton@primarydata.com>
5 */
6
7#include <linux/hash.h>
8#include <linux/slab.h>

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114nfsd_file_mark_find_or_create(struct nfsd_file *nf)
115{
116 int err;
117 struct fsnotify_mark *mark;
118 struct nfsd_file_mark *nfm = NULL, *new;
119 struct inode *inode = nf->nf_inode;
120
121 do {
1/*
2 * Open file cache.
3 *
4 * (c) 2015 - Jeff Layton <jeff.layton@primarydata.com>
5 */
6
7#include <linux/hash.h>
8#include <linux/slab.h>

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114nfsd_file_mark_find_or_create(struct nfsd_file *nf)
115{
116 int err;
117 struct fsnotify_mark *mark;
118 struct nfsd_file_mark *nfm = NULL, *new;
119 struct inode *inode = nf->nf_inode;
120
121 do {
122 mutex_lock(&nfsd_file_fsnotify_group->mark_mutex);
122 fsnotify_group_lock(nfsd_file_fsnotify_group);
123 mark = fsnotify_find_mark(&inode->i_fsnotify_marks,
123 mark = fsnotify_find_mark(&inode->i_fsnotify_marks,
124 nfsd_file_fsnotify_group);
124 nfsd_file_fsnotify_group);
125 if (mark) {
126 nfm = nfsd_file_mark_get(container_of(mark,
127 struct nfsd_file_mark,
128 nfm_mark));
125 if (mark) {
126 nfm = nfsd_file_mark_get(container_of(mark,
127 struct nfsd_file_mark,
128 nfm_mark));
129 mutex_unlock(&nfsd_file_fsnotify_group->mark_mutex);
129 fsnotify_group_unlock(nfsd_file_fsnotify_group);
130 if (nfm) {
131 fsnotify_put_mark(mark);
132 break;
133 }
134 /* Avoid soft lockup race with nfsd_file_mark_put() */
135 fsnotify_destroy_mark(mark, nfsd_file_fsnotify_group);
136 fsnotify_put_mark(mark);
130 if (nfm) {
131 fsnotify_put_mark(mark);
132 break;
133 }
134 /* Avoid soft lockup race with nfsd_file_mark_put() */
135 fsnotify_destroy_mark(mark, nfsd_file_fsnotify_group);
136 fsnotify_put_mark(mark);
137 } else
138 mutex_unlock(&nfsd_file_fsnotify_group->mark_mutex);
137 } else {
138 fsnotify_group_unlock(nfsd_file_fsnotify_group);
139 }
139
140 /* allocate a new nfm */
141 new = kmem_cache_alloc(nfsd_file_mark_slab, GFP_KERNEL);
142 if (!new)
143 return NULL;
144 fsnotify_init_mark(&new->nfm_mark, nfsd_file_fsnotify_group);
145 new->nfm_mark.mask = FS_ATTRIB|FS_DELETE_SELF;
146 refcount_set(&new->nfm_ref, 1);

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674
675 ret = lease_register_notifier(&nfsd_file_lease_notifier);
676 if (ret) {
677 pr_err("nfsd: unable to register lease notifier: %d\n", ret);
678 goto out_shrinker;
679 }
680
681 nfsd_file_fsnotify_group = fsnotify_alloc_group(&nfsd_file_fsnotify_ops,
140
141 /* allocate a new nfm */
142 new = kmem_cache_alloc(nfsd_file_mark_slab, GFP_KERNEL);
143 if (!new)
144 return NULL;
145 fsnotify_init_mark(&new->nfm_mark, nfsd_file_fsnotify_group);
146 new->nfm_mark.mask = FS_ATTRIB|FS_DELETE_SELF;
147 refcount_set(&new->nfm_ref, 1);

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675
676 ret = lease_register_notifier(&nfsd_file_lease_notifier);
677 if (ret) {
678 pr_err("nfsd: unable to register lease notifier: %d\n", ret);
679 goto out_shrinker;
680 }
681
682 nfsd_file_fsnotify_group = fsnotify_alloc_group(&nfsd_file_fsnotify_ops,
682 0);
683 FSNOTIFY_GROUP_NOFS);
683 if (IS_ERR(nfsd_file_fsnotify_group)) {
684 pr_err("nfsd: unable to create fsnotify group: %ld\n",
685 PTR_ERR(nfsd_file_fsnotify_group));
686 ret = PTR_ERR(nfsd_file_fsnotify_group);
687 nfsd_file_fsnotify_group = NULL;
688 goto out_notifier;
689 }
690

--- 367 unchanged lines hidden --- 		684 if (IS_ERR(nfsd_file_fsnotify_group)) {
685 pr_err("nfsd: unable to create fsnotify group: %ld\n",
686 PTR_ERR(nfsd_file_fsnotify_group));
687 ret = PTR_ERR(nfsd_file_fsnotify_group);
688 nfsd_file_fsnotify_group = NULL;
689 goto out_notifier;
690 }
691

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