Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 254 insertions, 0 deletions

diff --git a/fs/coda/sysctl.c b/fs/coda/sysctl.c
new file mode 100644
index 000000000000..f0b10757288f
--- /dev/null
+++ b/fs/coda/sysctl.c
@@ -0,0 +1,254 @@
+/*
+ * Sysctl operations for Coda filesystem
+ * Original version: (C) 1996 P. Braam and M. Callahan
+ * Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University
+ * 
+ * Carnegie Mellon encourages users to contribute improvements to
+ * the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
+ * 
+ * CODA operation statistics
+ * (c) March, 1998 Zhanyong Wan <zhanyong.wan@yale.edu>
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/time.h>
+#include <linux/mm.h>
+#include <linux/sysctl.h>
+#include <linux/proc_fs.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/ctype.h>
+#include <linux/bitops.h>
+#include <asm/uaccess.h>
+#include <linux/utsname.h>
+#include <linux/module.h>
+
+#include <linux/coda.h>
+#include <linux/coda_linux.h>
+#include <linux/coda_fs_i.h>
+#include <linux/coda_psdev.h>
+#include <linux/coda_cache.h>
+#include <linux/coda_proc.h>
+
+static struct ctl_table_header *fs_table_header;
+
+#define FS_CODA         1       /* Coda file system */
+
+#define CODA_TIMEOUT    3       /* timeout on upcalls to become intrble */
+#define CODA_HARD       5       /* mount type "hard" or "soft" */
+#define CODA_VFS 	 6       /* vfs statistics */
+#define CODA_CACHE_INV 	 9       /* cache invalidation statistics */
+#define CODA_FAKE_STATFS 10	 /* don't query venus for actual cache usage */
+
+struct coda_vfs_stats		coda_vfs_stat;
+static struct coda_cache_inv_stats	coda_cache_inv_stat;
+
+static void reset_coda_vfs_stats( void )
+{
+	memset( &coda_vfs_stat, 0, sizeof( coda_vfs_stat ) );
+}
+
+static void reset_coda_cache_inv_stats( void )
+{
+	memset( &coda_cache_inv_stat, 0, sizeof( coda_cache_inv_stat ) );
+}
+
+static int do_reset_coda_vfs_stats( ctl_table * table, int write,
+				    struct file * filp, void __user * buffer,
+				    size_t * lenp, loff_t * ppos )
+{
+	if ( write ) {
+		reset_coda_vfs_stats();
+
+		*ppos += *lenp;
+	} else {
+		*lenp = 0;
+	}
+
+	return 0;
+}
+
+static int do_reset_coda_cache_inv_stats( ctl_table * table, int write,
+					  struct file * filp,
+					  void __user * buffer,
+					  size_t * lenp, loff_t * ppos )
+{
+	if ( write ) {
+		reset_coda_cache_inv_stats();
+
+		*ppos += *lenp;
+	} else {
+		*lenp = 0;
+	}
+  
+	return 0;
+}
+
+static int coda_vfs_stats_get_info( char * buffer, char ** start,
+				    off_t offset, int length)
+{
+	int len=0;
+	off_t begin;
+	struct coda_vfs_stats * ps = & coda_vfs_stat;
+  
+  /* this works as long as we are below 1024 characters! */
+	len += sprintf( buffer,
+			"Coda VFS statistics\n"
+			"===================\n\n"
+			"File Operations:\n"
+			"\topen\t\t%9d\n"
+			"\tflush\t\t%9d\n"
+			"\trelease\t\t%9d\n"
+			"\tfsync\t\t%9d\n\n"
+			"Dir Operations:\n"
+			"\treaddir\t\t%9d\n\n"
+			"Inode Operations\n"
+			"\tcreate\t\t%9d\n"
+			"\tlookup\t\t%9d\n"
+			"\tlink\t\t%9d\n"
+			"\tunlink\t\t%9d\n"
+			"\tsymlink\t\t%9d\n"
+			"\tmkdir\t\t%9d\n"
+			"\trmdir\t\t%9d\n"
+			"\trename\t\t%9d\n"
+			"\tpermission\t%9d\n",
+
+			/* file operations */
+			ps->open,
+			ps->flush,
+			ps->release,
+			ps->fsync,
+
+			/* dir operations */
+			ps->readdir,
+		  
+			/* inode operations */
+			ps->create,
+			ps->lookup,
+			ps->link,
+			ps->unlink,
+			ps->symlink,
+			ps->mkdir,
+			ps->rmdir,
+			ps->rename,
+			ps->permission); 
+
+	begin = offset;
+	*start = buffer + begin;
+	len -= begin;
+
+	if ( len > length )
+		len = length;
+	if ( len < 0 )
+		len = 0;
+
+	return len;
+}
+
+static int coda_cache_inv_stats_get_info( char * buffer, char ** start,
+					  off_t offset, int length)
+{
+	int len=0;
+	off_t begin;
+	struct coda_cache_inv_stats * ps = & coda_cache_inv_stat;
+  
+	/* this works as long as we are below 1024 characters! */
+	len += sprintf( buffer,
+			"Coda cache invalidation statistics\n"
+			"==================================\n\n"
+			"flush\t\t%9d\n"
+			"purge user\t%9d\n"
+			"zap_dir\t\t%9d\n"
+			"zap_file\t%9d\n"
+			"zap_vnode\t%9d\n"
+			"purge_fid\t%9d\n"
+			"replace\t\t%9d\n",
+			ps->flush,
+			ps->purge_user,
+			ps->zap_dir,
+			ps->zap_file,
+			ps->zap_vnode,
+			ps->purge_fid,
+			ps->replace );
+  
+	begin = offset;
+	*start = buffer + begin;
+	len -= begin;
+
+	if ( len > length )
+		len = length;
+	if ( len < 0 )
+		len = 0;
+
+	return len;
+}
+
+static ctl_table coda_table[] = {
+ 	{CODA_TIMEOUT, "timeout", &coda_timeout, sizeof(int), 0644, NULL, &proc_dointvec},
+ 	{CODA_HARD, "hard", &coda_hard, sizeof(int), 0644, NULL, &proc_dointvec},
+ 	{CODA_VFS, "vfs_stats", NULL, 0, 0644, NULL, &do_reset_coda_vfs_stats},
+ 	{CODA_CACHE_INV, "cache_inv_stats", NULL, 0, 0644, NULL, &do_reset_coda_cache_inv_stats},
+ 	{CODA_FAKE_STATFS, "fake_statfs", &coda_fake_statfs, sizeof(int), 0600, NULL, &proc_dointvec},
+	{ 0 }
+};
+
+static ctl_table fs_table[] = {
+       {FS_CODA, "coda",    NULL, 0, 0555, coda_table},
+       {0}
+};
+
+
+#ifdef CONFIG_PROC_FS
+
+/*
+ target directory structure:
+   /proc/fs  (see linux/fs/proc/root.c)
+   /proc/fs/coda
+   /proc/fs/coda/{vfs_stats,
+
+*/
+
+static struct proc_dir_entry* proc_fs_coda;
+
+#endif
+
+#define coda_proc_create(name,get_info) \
+	create_proc_info_entry(name, 0, proc_fs_coda, get_info)
+
+void coda_sysctl_init(void)
+{
+	reset_coda_vfs_stats();
+	reset_coda_cache_inv_stats();
+
+#ifdef CONFIG_PROC_FS
+	proc_fs_coda = proc_mkdir("coda", proc_root_fs);
+	if (proc_fs_coda) {
+		proc_fs_coda->owner = THIS_MODULE;
+		coda_proc_create("vfs_stats", coda_vfs_stats_get_info);
+		coda_proc_create("cache_inv_stats", coda_cache_inv_stats_get_info);
+	}
+#endif
+
+#ifdef CONFIG_SYSCTL
+	if ( !fs_table_header )
+		fs_table_header = register_sysctl_table(fs_table, 0);
+#endif 
+}
+
+void coda_sysctl_clean(void) 
+{
+
+#ifdef CONFIG_SYSCTL
+	if ( fs_table_header ) {
+		unregister_sysctl_table(fs_table_header);
+		fs_table_header = NULL;
+	}
+#endif
+
+#ifdef CONFIG_PROC_FS
+        remove_proc_entry("cache_inv_stats", proc_fs_coda);
+        remove_proc_entry("vfs_stats", proc_fs_coda);
+	remove_proc_entry("coda", proc_root_fs);
+#endif 
+}