diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/oprofile/oprofile_files.c | |
download | kernel_samsung_espresso10-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip kernel_samsung_espresso10-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz kernel_samsung_espresso10-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 |
Linux-2.6.12-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!
Diffstat (limited to 'drivers/oprofile/oprofile_files.c')
-rw-r--r-- | drivers/oprofile/oprofile_files.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/drivers/oprofile/oprofile_files.c b/drivers/oprofile/oprofile_files.c new file mode 100644 index 0000000..9abedea --- /dev/null +++ b/drivers/oprofile/oprofile_files.c @@ -0,0 +1,135 @@ +/** + * @file oprofile_files.c + * + * @remark Copyright 2002 OProfile authors + * @remark Read the file COPYING + * + * @author John Levon <levon@movementarian.org> + */ + +#include <linux/fs.h> +#include <linux/oprofile.h> + +#include "event_buffer.h" +#include "oprofile_stats.h" +#include "oprof.h" + +unsigned long fs_buffer_size = 131072; +unsigned long fs_cpu_buffer_size = 8192; +unsigned long fs_buffer_watershed = 32768; /* FIXME: tune */ + +static ssize_t depth_read(struct file * file, char * buf, size_t count, loff_t * offset) +{ + return oprofilefs_ulong_to_user(backtrace_depth, buf, count, offset); +} + + +static ssize_t depth_write(struct file * file, char const * buf, size_t count, loff_t * offset) +{ + unsigned long val; + int retval; + + if (*offset) + return -EINVAL; + + retval = oprofilefs_ulong_from_user(&val, buf, count); + if (retval) + return retval; + + retval = oprofile_set_backtrace(val); + + if (retval) + return retval; + return count; +} + + +static struct file_operations depth_fops = { + .read = depth_read, + .write = depth_write +}; + + +static ssize_t pointer_size_read(struct file * file, char __user * buf, size_t count, loff_t * offset) +{ + return oprofilefs_ulong_to_user(sizeof(void *), buf, count, offset); +} + + +static struct file_operations pointer_size_fops = { + .read = pointer_size_read, +}; + + +static ssize_t cpu_type_read(struct file * file, char __user * buf, size_t count, loff_t * offset) +{ + return oprofilefs_str_to_user(oprofile_ops.cpu_type, buf, count, offset); +} + + +static struct file_operations cpu_type_fops = { + .read = cpu_type_read, +}; + + +static ssize_t enable_read(struct file * file, char __user * buf, size_t count, loff_t * offset) +{ + return oprofilefs_ulong_to_user(oprofile_started, buf, count, offset); +} + + +static ssize_t enable_write(struct file * file, char const __user * buf, size_t count, loff_t * offset) +{ + unsigned long val; + int retval; + + if (*offset) + return -EINVAL; + + retval = oprofilefs_ulong_from_user(&val, buf, count); + if (retval) + return retval; + + if (val) + retval = oprofile_start(); + else + oprofile_stop(); + + if (retval) + return retval; + return count; +} + + +static struct file_operations enable_fops = { + .read = enable_read, + .write = enable_write, +}; + + +static ssize_t dump_write(struct file * file, char const __user * buf, size_t count, loff_t * offset) +{ + wake_up_buffer_waiter(); + return count; +} + + +static struct file_operations dump_fops = { + .write = dump_write, +}; + +void oprofile_create_files(struct super_block * sb, struct dentry * root) +{ + oprofilefs_create_file(sb, root, "enable", &enable_fops); + oprofilefs_create_file_perm(sb, root, "dump", &dump_fops, 0666); + oprofilefs_create_file(sb, root, "buffer", &event_buffer_fops); + oprofilefs_create_ulong(sb, root, "buffer_size", &fs_buffer_size); + oprofilefs_create_ulong(sb, root, "buffer_watershed", &fs_buffer_watershed); + oprofilefs_create_ulong(sb, root, "cpu_buffer_size", &fs_cpu_buffer_size); + oprofilefs_create_file(sb, root, "cpu_type", &cpu_type_fops); + oprofilefs_create_file(sb, root, "backtrace_depth", &depth_fops); + oprofilefs_create_file(sb, root, "pointer_size", &pointer_size_fops); + oprofile_create_stats_files(sb, root); + if (oprofile_ops.create_files) + oprofile_ops.create_files(sb, root); +} |