~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/fs/9p/vfs_dentry.c

Version: ~ [ linux-5.6 ] ~ [ linux-5.5.13 ] ~ [ linux-5.4.28 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.113 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.174 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.217 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.217 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.82 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  *  linux/fs/9p/vfs_dentry.c
  3  *
  4  * This file contians vfs dentry ops for the 9P2000 protocol.
  5  *
  6  *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
  7  *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
  8  *
  9  *  This program is free software; you can redistribute it and/or modify
 10  *  it under the terms of the GNU General Public License version 2
 11  *  as published by the Free Software Foundation.
 12  *
 13  *  This program is distributed in the hope that it will be useful,
 14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 16  *  GNU General Public License for more details.
 17  *
 18  *  You should have received a copy of the GNU General Public License
 19  *  along with this program; if not, write to:
 20  *  Free Software Foundation
 21  *  51 Franklin Street, Fifth Floor
 22  *  Boston, MA  02111-1301  USA
 23  *
 24  */
 25 
 26 #include <linux/module.h>
 27 #include <linux/errno.h>
 28 #include <linux/fs.h>
 29 #include <linux/file.h>
 30 #include <linux/pagemap.h>
 31 #include <linux/stat.h>
 32 #include <linux/string.h>
 33 #include <linux/inet.h>
 34 #include <linux/namei.h>
 35 #include <linux/idr.h>
 36 #include <linux/sched.h>
 37 #include <linux/slab.h>
 38 #include <net/9p/9p.h>
 39 #include <net/9p/client.h>
 40 
 41 #include "v9fs.h"
 42 #include "v9fs_vfs.h"
 43 #include "fid.h"
 44 
 45 /**
 46  * v9fs_cached_dentry_delete - called when dentry refcount equals 0
 47  * @dentry:  dentry in question
 48  *
 49  */
 50 static int v9fs_cached_dentry_delete(const struct dentry *dentry)
 51 {
 52         p9_debug(P9_DEBUG_VFS, " dentry: %pd (%p)\n",
 53                  dentry, dentry);
 54 
 55         /* Don't cache negative dentries */
 56         if (d_really_is_negative(dentry))
 57                 return 1;
 58         return 0;
 59 }
 60 
 61 /**
 62  * v9fs_dentry_release - called when dentry is going to be freed
 63  * @dentry:  dentry that is being release
 64  *
 65  */
 66 
 67 static void v9fs_dentry_release(struct dentry *dentry)
 68 {
 69         struct hlist_node *p, *n;
 70         p9_debug(P9_DEBUG_VFS, " dentry: %pd (%p)\n",
 71                  dentry, dentry);
 72         hlist_for_each_safe(p, n, (struct hlist_head *)&dentry->d_fsdata)
 73                 p9_client_clunk(hlist_entry(p, struct p9_fid, dlist));
 74         dentry->d_fsdata = NULL;
 75 }
 76 
 77 static int v9fs_lookup_revalidate(struct dentry *dentry, unsigned int flags)
 78 {
 79         struct p9_fid *fid;
 80         struct inode *inode;
 81         struct v9fs_inode *v9inode;
 82 
 83         if (flags & LOOKUP_RCU)
 84                 return -ECHILD;
 85 
 86         inode = d_inode(dentry);
 87         if (!inode)
 88                 goto out_valid;
 89 
 90         v9inode = V9FS_I(inode);
 91         if (v9inode->cache_validity & V9FS_INO_INVALID_ATTR) {
 92                 int retval;
 93                 struct v9fs_session_info *v9ses;
 94                 fid = v9fs_fid_lookup(dentry);
 95                 if (IS_ERR(fid))
 96                         return PTR_ERR(fid);
 97 
 98                 v9ses = v9fs_inode2v9ses(inode);
 99                 if (v9fs_proto_dotl(v9ses))
100                         retval = v9fs_refresh_inode_dotl(fid, inode);
101                 else
102                         retval = v9fs_refresh_inode(fid, inode);
103                 if (retval == -ENOENT)
104                         return 0;
105                 if (retval < 0)
106                         return retval;
107         }
108 out_valid:
109         return 1;
110 }
111 
112 const struct dentry_operations v9fs_cached_dentry_operations = {
113         .d_revalidate = v9fs_lookup_revalidate,
114         .d_weak_revalidate = v9fs_lookup_revalidate,
115         .d_delete = v9fs_cached_dentry_delete,
116         .d_release = v9fs_dentry_release,
117 };
118 
119 const struct dentry_operations v9fs_dentry_operations = {
120         .d_delete = always_delete_dentry,
121         .d_release = v9fs_dentry_release,
122 };
123 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp