| 1 | |
| 2 | #include <linux/debugfs.h>
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| 3 | #include <linux/ras.h>
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| 4 | #include "debugfs.h"
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| 5 |
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| 6 | struct dentry *ras_debugfs_dir;
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| 7 |
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| 8 | static atomic_t trace_count = ATOMIC_INIT(0);
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| 9 |
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| 10 | int ras_userspace_consumers(void)
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| 11 | {
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| 12 | return atomic_read(&trace_count);
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| 13 | }
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| 14 | EXPORT_SYMBOL_GPL(ras_userspace_consumers);
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| 15 |
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| 16 | static int trace_show(struct seq_file *m, void *v)
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| 17 | {
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| 18 | return 0;
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| 19 | }
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| 20 |
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| 21 | static int trace_open(struct inode *inode, struct file *file)
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| 22 | {
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| 23 | atomic_inc(&trace_count);
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| 24 | return single_open(file, trace_show, NULL);
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| 25 | }
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| 26 |
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| 27 | static int trace_release(struct inode *inode, struct file *file)
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| 28 | {
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| 29 | atomic_dec(&trace_count);
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| 30 | return single_release(inode, file);
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| 31 | }
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| 32 |
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| 33 | static const struct file_operations trace_fops = {
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| 34 | .open = trace_open,
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| 35 | .read = seq_read,
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| 36 | .llseek = seq_lseek,
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| 37 | .release = trace_release,
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| 38 | };
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| 39 |
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| 40 | int __init ras_add_daemon_trace(void)
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| 41 | {
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| 42 | struct dentry *fentry;
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| 43 |
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| 44 | if (!ras_debugfs_dir)
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| 45 | return -ENOENT;
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| 46 |
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| 47 | fentry = debugfs_create_file("daemon_active", S_IRUSR, ras_debugfs_dir,
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| 48 | NULL, &trace_fops);
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| 49 | if (!fentry)
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| 50 | return -ENODEV;
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| 51 |
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| 52 | return 0;
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| 53 |
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| 54 | }
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| 55 |
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| 56 | void __init ras_debugfs_init(void)
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| 57 | {
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| 58 | ras_debugfs_dir = debugfs_create_dir("ras", NULL);
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| 59 | }
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