From: Mathieu Desnoyers Date: Thu, 19 Mar 2015 19:29:01 +0000 (-0400) Subject: Fix: update writeback instrumentation for kernel 4.0+ X-Git-Tag: v2.6.1~27 X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=9a8687aa0cf51f3efd6f9f0aa1352ca9f1aa6816;p=lttng-modules.git Fix: update writeback instrumentation for kernel 4.0+ Introduced by Linux kernel commit: commit 0ae45f63d4ef8d8eeec49c7d8b44a1775fff13e8 Author: Theodore Ts'o Date: Mon Feb 2 00:37:00 2015 -0500 vfs: add support for a lazytime mount option And: commit de1414a654e66b81b5348dbc5259ecf2fb61655e Author: Christoph Hellwig Date: Wed Jan 14 10:42:36 2015 +0100 fs: export inode_to_bdi and use it in favor of mapping->backing_dev_info Signed-off-by: Mathieu Desnoyers --- diff --git a/instrumentation/events/lttng-module/writeback.h b/instrumentation/events/lttng-module/writeback.h index a7657ed0..79f84b76 100644 --- a/instrumentation/events/lttng-module/writeback.h +++ b/instrumentation/events/lttng-module/writeback.h @@ -12,6 +12,8 @@ #ifndef _TRACE_WRITEBACK_DEF_ #define _TRACE_WRITEBACK_DEF_ + +#if (LINUX_VERSION_CODE < KERNEL_VERSION(4,0,0)) static inline struct backing_dev_info *inode_to_bdi(struct inode *inode) { struct super_block *sb = inode->i_sb; @@ -21,8 +23,26 @@ static inline struct backing_dev_info *inode_to_bdi(struct inode *inode) return sb->s_bdi; } +#endif /* #if (LINUX_VERSION_CODE < KERNEL_VERSION(4,0,0)) */ + #endif +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,0,0)) +#define show_inode_state(state) \ + __print_flags(state, "|", \ + {I_DIRTY_SYNC, "I_DIRTY_SYNC"}, \ + {I_DIRTY_DATASYNC, "I_DIRTY_DATASYNC"}, \ + {I_DIRTY_PAGES, "I_DIRTY_PAGES"}, \ + {I_NEW, "I_NEW"}, \ + {I_WILL_FREE, "I_WILL_FREE"}, \ + {I_FREEING, "I_FREEING"}, \ + {I_CLEAR, "I_CLEAR"}, \ + {I_SYNC, "I_SYNC"}, \ + {I_DIRTY_TIME, "I_DIRTY_TIME"}, \ + {I_DIRTY_TIME_EXPIRED, "I_DIRTY_TIME_EXPIRED"}, \ + {I_REFERENCED, "I_REFERENCED"} \ + ) +#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,0,0)) */ #define show_inode_state(state) \ __print_flags(state, "|", \ {I_DIRTY_SYNC, "I_DIRTY_SYNC"}, \ @@ -35,6 +55,7 @@ static inline struct backing_dev_info *inode_to_bdi(struct inode *inode) {I_SYNC, "I_SYNC"}, \ {I_REFERENCED, "I_REFERENCED"} \ ) +#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,0,0)) */ #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,2,0)) #define WB_WORK_REASON \ @@ -48,7 +69,91 @@ static inline struct backing_dev_info *inode_to_bdi(struct inode *inode) {WB_REASON_FORKER_THREAD, "forker_thread"} #endif -#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0)) +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,0,0)) + +LTTNG_TRACEPOINT_EVENT(writeback_dirty_page, + TP_PROTO(struct page *page, struct address_space *mapping), + TP_ARGS(page, mapping), + TP_STRUCT__entry ( + __array_text(char, name, 32) + __field(unsigned long, ino) + __field(pgoff_t, index) + ), + TP_fast_assign( + tp_memcpy(name, + mapping ? dev_name(inode_to_bdi(mapping->host)->dev) : "(unknown)", 32) + tp_assign(ino, mapping ? mapping->host->i_ino : 0) + tp_assign(index, page->index) + ), + TP_printk("bdi %s: ino=%lu index=%lu", + __entry->name, + __entry->ino, + __entry->index + ) +) + +LTTNG_TRACEPOINT_EVENT_CLASS(writeback_dirty_inode_template, + TP_PROTO(struct inode *inode, int flags), + TP_ARGS(inode, flags), + TP_STRUCT__entry ( + __array_text(char, name, 32) + __field(unsigned long, ino) + __field(unsigned long, state) + __field(unsigned long, flags) + ), + TP_fast_assign( + /* may be called for files on pseudo FSes w/ unregistered bdi */ + tp_memcpy(name, + inode_to_bdi(inode)->dev ? + dev_name(inode_to_bdi(inode)->dev) : "(unknown)", 32) + tp_assign(ino, inode->i_ino) + tp_assign(state, inode->i_state) + tp_assign(flags, flags) + ), + TP_printk("bdi %s: ino=%lu flags=%s", + __entry->name, + __entry->ino, + show_inode_state(__entry->flags) + ) +) +#define LTTNG_TRACEPOINT_EVENT_WRITEBACK_DIRTY_INODE_TEMPLATE(name) \ +LTTNG_TRACEPOINT_EVENT_INSTANCE(writeback_dirty_inode_template, name, \ + TP_PROTO(struct inode *inode, int flags), \ + TP_ARGS(inode, flags)) +LTTNG_TRACEPOINT_EVENT_WRITEBACK_DIRTY_INODE_TEMPLATE(writeback_dirty_inode_start) +LTTNG_TRACEPOINT_EVENT_WRITEBACK_DIRTY_INODE_TEMPLATE(writeback_dirty_inode) +LTTNG_TRACEPOINT_EVENT_WRITEBACK_DIRTY_INODE_TEMPLATE(writeback_mark_inode_dirty) + +LTTNG_TRACEPOINT_EVENT_CLASS(writeback_write_inode_template, + TP_PROTO(struct inode *inode, struct writeback_control *wbc), + TP_ARGS(inode, wbc), + TP_STRUCT__entry ( + __array_text(char, name, 32) + __field(unsigned long, ino) + __field(int, sync_mode) + ), + TP_fast_assign( + tp_memcpy(name, + dev_name(inode_to_bdi(inode)->dev), 32) + tp_assign(ino, inode->i_ino) + tp_assign(sync_mode, wbc->sync_mode) + ), + TP_printk("bdi %s: ino=%lu sync_mode=%d", + __entry->name, + __entry->ino, + __entry->sync_mode + ) +) + +#define LTTNG_TRACEPOINT_EVENT_WRITEBACK_WRITE_INODE(name) \ +LTTNG_TRACEPOINT_EVENT_INSTANCE(writeback_write_inode_template, name, \ + TP_PROTO(struct inode *inode, struct writeback_control *wbc), \ + TP_ARGS(inode, wbc)) +LTTNG_TRACEPOINT_EVENT_WRITEBACK_WRITE_INODE(writeback_write_inode_start) +LTTNG_TRACEPOINT_EVENT_WRITEBACK_WRITE_INODE(writeback_write_inode) + +#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0)) + LTTNG_TRACEPOINT_EVENT(writeback_dirty_page, TP_PROTO(struct page *page, struct address_space *mapping), TP_ARGS(page, mapping), @@ -126,8 +231,28 @@ LTTNG_TRACEPOINT_EVENT_INSTANCE(writeback_write_inode_template, name, \ TP_ARGS(inode, wbc)) LTTNG_TRACEPOINT_EVENT_WRITEBACK_WRITE_INODE(writeback_write_inode_start) LTTNG_TRACEPOINT_EVENT_WRITEBACK_WRITE_INODE(writeback_write_inode) + #endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0)) */ +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,0,0)) + +LTTNG_TRACEPOINT_EVENT_CLASS(writeback_work_class, + TP_PROTO(struct backing_dev_info *bdi, struct wb_writeback_work *work), + TP_ARGS(bdi, work), + TP_STRUCT__entry( + __array_text(char, name, 32) + ), + TP_fast_assign( + tp_memcpy(name, bdi->dev ? dev_name(bdi->dev) : + "(unknown)", 32) + ), + TP_printk("bdi %s", + __entry->name + ) +) + +#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,0,0)) */ + LTTNG_TRACEPOINT_EVENT_CLASS(writeback_work_class, TP_PROTO(struct backing_dev_info *bdi, struct wb_writeback_work *work), TP_ARGS(bdi, work), @@ -142,6 +267,9 @@ LTTNG_TRACEPOINT_EVENT_CLASS(writeback_work_class, __entry->name ) ) + +#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,0,0)) */ + #define LTTNG_TRACEPOINT_EVENT_WRITEBACK_WORK_INSTANCE(name) \ LTTNG_TRACEPOINT_EVENT_INSTANCE(writeback_work_class, name, \ TP_PROTO(struct backing_dev_info *bdi, struct wb_writeback_work *work), \