d854b68890
Refactor the fs readpage/write tracepoints to move the inode->path lookup outside the tracepoint code, and pass a pointer to the path into the tracepoint code instead. This is necessary because the tracepoint code runs non-preemptible. Thanks to Trilok Soni for catching this in 4.4. Change-Id: I7486c5947918d155a30c61d6b9cd5027cf8fbe15 Signed-off-by: Mohan Srinivasan <srmohan@google.com>
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
#if !defined(_TRACE_ANDROID_FS_TEMPLATE_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_ANDROID_FS_TEMPLATE_H
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#include <linux/tracepoint.h>
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DECLARE_EVENT_CLASS(android_fs_data_start_template,
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TP_PROTO(struct inode *inode, loff_t offset, int bytes,
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pid_t pid, char *pathname, char *command),
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TP_ARGS(inode, offset, bytes, pid, pathname, command),
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TP_STRUCT__entry(
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__string(pathbuf, pathname);
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__field(loff_t, offset);
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__field(int, bytes);
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__field(loff_t, i_size);
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__string(cmdline, command);
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__field(pid_t, pid);
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__field(ino_t, ino);
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),
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TP_fast_assign(
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{
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__assign_str(pathbuf, pathname);
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__entry->offset = offset;
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__entry->bytes = bytes;
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__entry->i_size = i_size_read(inode);
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__assign_str(cmdline, command);
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__entry->pid = pid;
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__entry->ino = inode->i_ino;
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}
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),
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TP_printk("entry_name %s, offset %llu, bytes %d, cmdline %s,"
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" pid %d, i_size %llu, ino %lu",
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__get_str(pathbuf), __entry->offset, __entry->bytes,
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__get_str(cmdline), __entry->pid, __entry->i_size,
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(unsigned long) __entry->ino)
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);
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DECLARE_EVENT_CLASS(android_fs_data_end_template,
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TP_PROTO(struct inode *inode, loff_t offset, int bytes),
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TP_ARGS(inode, offset, bytes),
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TP_STRUCT__entry(
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__field(ino_t, ino);
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__field(loff_t, offset);
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__field(int, bytes);
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),
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TP_fast_assign(
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{
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__entry->ino = inode->i_ino;
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__entry->offset = offset;
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__entry->bytes = bytes;
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}
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),
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TP_printk("ino %lu, offset %llu, bytes %d",
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(unsigned long) __entry->ino,
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__entry->offset, __entry->bytes)
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);
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#endif /* _TRACE_ANDROID_FS_TEMPLATE_H */
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