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authorChuck Lever <cel@netapp.com>2006-03-20 13:44:12 -0500
committerTrond Myklebust <Trond.Myklebust@netapp.com>2006-03-20 13:44:12 -0500
commitb4629fe2f094b719847f31be1ee5ab38300038b2 (patch)
tree158b3aabf291ef9462e3e02493fb4c45265f9e8e /include
parent1356b8c28d67cafd74f7e7dcfb39bf53681790a5 (diff)
VFS: New /proc file /proc/self/mountstats
Create a new file under /proc/self, called mountstats, where mounted file systems can export information (configuration options, performance counters, and so on). Use a mechanism similar to /proc/mounts and s_ops->show_options. This mechanism does not violate namespace security, and is safe to use while other processes are unmounting file systems. Thanks to Mike Waychison for his review and comments. Test-plan: Test concurrent mount/unmount operations while cat'ing /proc/self/mountstats. Signed-off-by: Chuck Lever <cel@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/fs.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 128d0082522c..be21e860a9f2 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1086,6 +1086,7 @@ struct super_operations {
1086 void (*umount_begin) (struct super_block *); 1086 void (*umount_begin) (struct super_block *);
1087 1087
1088 int (*show_options)(struct seq_file *, struct vfsmount *); 1088 int (*show_options)(struct seq_file *, struct vfsmount *);
1089 int (*show_stats)(struct seq_file *, struct vfsmount *);
1089 1090
1090 ssize_t (*quota_read)(struct super_block *, int, char *, size_t, loff_t); 1091 ssize_t (*quota_read)(struct super_block *, int, char *, size_t, loff_t);
1091 ssize_t (*quota_write)(struct super_block *, int, const char *, size_t, loff_t); 1092 ssize_t (*quota_write)(struct super_block *, int, const char *, size_t, loff_t);