diff options
author | Theodore Ts'o <tytso@mit.edu> | 2008-09-23 18:07:35 -0400 |
---|---|---|
committer | Theodore Ts'o <tytso@mit.edu> | 2008-09-23 18:07:35 -0400 |
commit | 5e8814f2f74f53d58aa5679bf32b38a7940033fe (patch) | |
tree | 05f70d1d57d20111a57cd35fb971e36f836d24e8 /fs/ext4/super.c | |
parent | 9f6200bbfc962d8f926278cf5d5ddb90a228c322 (diff) | |
download | kernel_samsung_smdk4412-5e8814f2f74f53d58aa5679bf32b38a7940033fe.zip kernel_samsung_smdk4412-5e8814f2f74f53d58aa5679bf32b38a7940033fe.tar.gz kernel_samsung_smdk4412-5e8814f2f74f53d58aa5679bf32b38a7940033fe.tar.bz2 |
ext4: Combine proc file handling into a single set of functions
Previously mballoc created a separate set of functions for each proc
file. This combines the tunables into a single set of functions which
gets used for all of the per-superblock proc files, saving
approximately 2k of compiled object code.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/super.c')
-rw-r--r-- | fs/ext4/super.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 7feeec6..9f5468f 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -3541,6 +3541,48 @@ static int ext4_get_sb(struct file_system_type *fs_type, return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); } +#ifdef CONFIG_PROC_FS +static int ext4_ui_proc_show(struct seq_file *m, void *v) +{ + unsigned int *p = m->private; + + seq_printf(m, "%u\n", *p); + return 0; +} + +static int ext4_ui_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, ext4_ui_proc_show, PDE(inode)->data); +} + +static ssize_t ext4_ui_proc_write(struct file *file, const char __user *buf, + size_t cnt, loff_t *ppos) +{ + unsigned int *p = PDE(file->f_path.dentry->d_inode)->data; + char str[32]; + unsigned long value; + + if (cnt >= sizeof(str)) + return -EINVAL; + if (copy_from_user(str, buf, cnt)) + return -EFAULT; + value = simple_strtol(str, NULL, 0); + if (value < 0) + return -ERANGE; + *p = value; + return cnt; +} + +const struct file_operations ext4_ui_proc_fops = { + .owner = THIS_MODULE, + .open = ext4_ui_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = ext4_ui_proc_write, +}; +#endif + static struct file_system_type ext4dev_fs_type = { .owner = THIS_MODULE, .name = "ext4dev", |