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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?l2j5hCA1ww9oXQiU/kM7TzoGe6GnLB6z9Z8bF7S0rvKbhcWKj8zEzKIaac4g?= =?us-ascii?Q?CbhO4EmhjCqMN33DNC3Rmrf9b4i/3Tm2q5y9JPG3QIp0N01JNvUgXuDjVo8k?= =?us-ascii?Q?Df7DlCRA1lL4/1P4kKbe3VUNpsX2uPy/bUsYsO1D1ZD/ey+XGQJjNIljsnoz?= =?us-ascii?Q?PK/GW/Z9AMtl7Yvc1fLaKLScD2w9RwBMGSjFqj4zT65SvIc7TjnQSYR+H1C0?= =?us-ascii?Q?ai0vzphVY261YJQq5gKAXd6NJrPxyfv27ZNOoa4OLOdO6oN7eUT4GTj9jwCL?= =?us-ascii?Q?Iok/vVD1EGEu57U31gu17zZGtzhhGNCdVicMFHiwZxtNXoIL8ZK/c4oTJrzj?= =?us-ascii?Q?vpOFUsAFOKs4Uq4x2tME07NJ9q4EUpjvoh8UCr+uq74hRV7L4i5yOjQ01i0V?= =?us-ascii?Q?u71YUsYBx1te/ETKmNXc2CEsDrZkcUaew6dnafuls60IrhYb4ndLzpY5r1ue?= =?us-ascii?Q?oJrS9FmzhFD9nmRVUuzGfQwEXtxt8u8QWWp/68r3O2bP2t56sgxNeRcNcZ24?= =?us-ascii?Q?AXFK7tuYuBhJf0ZIExCHXUJQRylgA+63tC/B8AUzqHqEl8pfhx3tKaPaKAhv?= =?us-ascii?Q?ooIsUXEkVKUJKBycukzIly5Wlc6GoDbC0IcPb3ij9YRxik2uVuDsJp3Kojsx?= =?us-ascii?Q?fsZiLzX/x9YJY1lVhBpEduYz/77SPI0Z6tJWA0a5YTsDl5GcRJ+vj5aFPHYo?= =?us-ascii?Q?dE+RMwBI+olfRnhtbifF8wthKC9EeWDHGc6+gqi/liuCvRdHDNwaOqQRD0av?= =?us-ascii?Q?MqHSujjoDVY74JxURQDGAMO7HBOn2n4U3DDpMQzR8UzHMJMmHZztSPKdrIYK?= =?us-ascii?Q?oV+EDKqZ9d6O1UbZGu5go6sh1LT91ciDLQqEg5CeqQ/wpH9rFpKEBAdJPNtJ?= =?us-ascii?Q?8DIyD1cpCaFb/J0WEya8VeKMYwpiqHfOv27DgXSKBPnvSrAz1//Yzme7kx3G?= =?us-ascii?Q?hqZ9aRsqIFFomloNZm2z9SHt0npu0hLyxFvQ7Lbb1YfiYz+a4br9uqk3jQQZ?= =?us-ascii?Q?lSJzd/QMEOjdJycDO2Sx/rB7WMq9AxnAVmygE8rSS8Ktt26a2PwHR0Ec8JrN?= =?us-ascii?Q?afWVOY9z5uxrUpneyJ981xMoV5Kpgj/Y51vvoqaakVm0t1MB+3MnoEhfzwu4?= =?us-ascii?Q?os2z8ByYT8AGj1pENy1M9w+RY/4nGZATiKDlJRHzHBh40UJ2U3xmTCfXxd9o?= =?us-ascii?Q?0YSIQotmyIAILJWaUHWzMBwG2b/bl589puoIKq4Cvo05HvCa0/XL8+VKtbh8?= =?us-ascii?Q?Ew57hDgaGfsDBPBL4BuPRKtf8Dm1r42GUY7P3UpiKx7ZM3Cy24ODBjQb0agt?= =?us-ascii?Q?3vkV+FIfT8YA8j5ok3YxdAlcZb3A5Rr2rzleEa2LR2/WS84IgCUHkiNoaS4r?= =?us-ascii?Q?xN6nZRgSDp3683XpBpXq9/T5iKcfJog5u2C4PZa26AEDTMMBEGzLQXg9ExtU?= =?us-ascii?Q?cEPUkVIEt4wI0RF2io/nj2g2FJj6xMu6Xx0NJp6J8+K9qb2cJkGjIAqkpJDg?= =?us-ascii?Q?QLIb2ImPlfwCGTdwBSKULmt0/CaPgQeidGGgRyMMGiSmYyiS3xVhzeL7nyDV?= =?us-ascii?Q?H1xOjogQxizQB9qE+BYqgvAFGi0CmmEb+/UavIwd?= X-OriginatorOrg: vmware.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0b7aafc8-6cfb-4577-b204-08dafc9b295a X-MS-Exchange-CrossTenant-AuthSource: PH0PR05MB8703.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Jan 2023 17:07:37.2942 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: b39138ca-3cee-4b4a-a4d6-cd83d9dd62f0 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 7fSD3B+sKD52gA7+z37eoJMCQVAtM/x+uvAwhxwRCAjRH+lBaDI4IGgbCed0g1KtdnIVXc54ix7+f3oq6DapNQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR05MB9322 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Till now /sys/kernel/debug/tracing/events is a part of tracefs, with-in this patch creating 'events' and it's sub-dir as eventfs. Basically replacing tracefs calls with eventfs calls for 'events'. Signed-off-by: Ajay Kaher Co-developed-by: Steven Rostedt (VMware) Signed-off-by: Steven Rostedt (VMware) Tested-by: Ching-lin Yu --- fs/tracefs/inode.c | 18 +++++++++++++ include/linux/trace_events.h | 1 + kernel/trace/trace.h | 2 +- kernel/trace/trace_events.c | 64 +++++++++++++++++++++++--------------------- 4 files changed, 54 insertions(+), 31 deletions(-) diff --git a/fs/tracefs/inode.c b/fs/tracefs/inode.c index 8fdbd81..44b4344 100644 --- a/fs/tracefs/inode.c +++ b/fs/tracefs/inode.c @@ -374,6 +374,23 @@ static const struct super_operations tracefs_super_operations = { .show_options = tracefs_show_options, }; +static void tracefs_dentry_iput(struct dentry *dentry, struct inode *inode) +{ + struct tracefs_inode *ti; + + if (!dentry || !inode) + return; + + ti = get_tracefs(inode); + if (ti && ti->flags & TRACEFS_EVENT_INODE) + eventfs_set_ef_status_free(dentry); + iput(inode); +} + +const struct dentry_operations tracefs_dentry_operations = { + .d_iput = tracefs_dentry_iput, +}; + static int trace_fill_super(struct super_block *sb, void *data, int silent) { static const struct tree_descr trace_files[] = {{""}}; @@ -396,6 +413,7 @@ static int trace_fill_super(struct super_block *sb, void *data, int silent) goto fail; sb->s_op = &tracefs_super_operations; + sb->s_d_op = &tracefs_dentry_operations; tracefs_apply_options(sb, false); diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h index 4342e99..0a810ab 100644 --- a/include/linux/trace_events.h +++ b/include/linux/trace_events.h @@ -634,6 +634,7 @@ struct trace_event_file { struct list_head list; struct trace_event_call *event_call; struct event_filter __rcu *filter; + struct eventfs_file *ef; struct dentry *dir; struct trace_array *tr; struct trace_subsystem_dir *system; diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index e46a492..97d2e35 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -1302,7 +1302,7 @@ struct trace_subsystem_dir { struct list_head list; struct event_subsystem *subsystem; struct trace_array *tr; - struct dentry *entry; + struct eventfs_file *ef; int ref_count; int nr_events; }; diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index 33e0b4f..b441f6a 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -973,7 +973,8 @@ static void remove_subsystem(struct trace_subsystem_dir *dir) return; if (!--dir->nr_events) { - tracefs_remove(dir->entry); + if (dir->ef) + eventfs_remove(dir->ef); list_del(&dir->list); __put_system_dir(dir); } @@ -994,7 +995,8 @@ static void remove_event_file_dir(struct trace_event_file *file) tracefs_remove(dir); } - + if (file->ef) + eventfs_remove(file->ef); list_del(&file->list); remove_subsystem(file->system); free_event_filter(file->filter); @@ -2277,13 +2279,13 @@ create_new_subsystem(const char *name) return NULL; } -static struct dentry * +static struct eventfs_file * event_subsystem_dir(struct trace_array *tr, const char *name, struct trace_event_file *file, struct dentry *parent) { struct event_subsystem *system, *iter; struct trace_subsystem_dir *dir; - struct dentry *entry; + int res; /* First see if we did not already create this dir */ list_for_each_entry(dir, &tr->systems, list) { @@ -2291,7 +2293,7 @@ event_subsystem_dir(struct trace_array *tr, const char *name, if (strcmp(system->name, name) == 0) { dir->nr_events++; file->system = dir; - return dir->entry; + return dir->ef; } } @@ -2315,8 +2317,8 @@ event_subsystem_dir(struct trace_array *tr, const char *name, } else __get_system(system); - dir->entry = tracefs_create_dir(name, parent); - if (!dir->entry) { + dir->ef = eventfs_add_subsystem_dir(name, parent); + if (IS_ERR(dir->ef)) { pr_warn("Failed to create system directory %s\n", name); __put_system(system); goto out_free; @@ -2331,22 +2333,22 @@ event_subsystem_dir(struct trace_array *tr, const char *name, /* the ftrace system is special, do not create enable or filter files */ if (strcmp(name, "ftrace") != 0) { - entry = tracefs_create_file("filter", TRACE_MODE_WRITE, - dir->entry, dir, + res = eventfs_add_file("filter", TRACE_MODE_WRITE, + dir->ef, dir, &ftrace_subsystem_filter_fops); - if (!entry) { + if (res) { kfree(system->filter); system->filter = NULL; pr_warn("Could not create tracefs '%s/filter' entry\n", name); } - trace_create_file("enable", TRACE_MODE_WRITE, dir->entry, dir, + eventfs_add_file("enable", TRACE_MODE_WRITE, dir->ef, dir, &ftrace_system_enable_fops); } list_add(&dir->list, &tr->systems); - return dir->entry; + return dir->ef; out_free: kfree(dir); @@ -2399,6 +2401,7 @@ event_create_dir(struct dentry *parent, struct trace_event_file *file) { struct trace_event_call *call = file->event_call; struct trace_array *tr = file->tr; + struct eventfs_file *ef_subsystem = NULL; struct dentry *d_events; const char *name; int ret; @@ -2408,26 +2411,26 @@ event_create_dir(struct dentry *parent, struct trace_event_file *file) * then the system would be called "TRACE_SYSTEM". */ if (strcmp(call->class->system, TRACE_SYSTEM) != 0) { - d_events = event_subsystem_dir(tr, call->class->system, file, parent); - if (!d_events) + ef_subsystem = event_subsystem_dir(tr, call->class->system, file, parent); + if (!ef_subsystem) return -ENOMEM; } else d_events = parent; name = trace_event_name(call); - file->dir = tracefs_create_dir(name, d_events); - if (!file->dir) { + file->ef = eventfs_add_dir(name, ef_subsystem); + if (IS_ERR(file->ef)) { pr_warn("Could not create tracefs '%s' directory\n", name); return -1; } if (call->class->reg && !(call->flags & TRACE_EVENT_FL_IGNORE_ENABLE)) - trace_create_file("enable", TRACE_MODE_WRITE, file->dir, file, + eventfs_add_file("enable", TRACE_MODE_WRITE, file->ef, file, &ftrace_enable_fops); #ifdef CONFIG_PERF_EVENTS if (call->event.type && call->class->reg) - trace_create_file("id", TRACE_MODE_READ, file->dir, + eventfs_add_file("id", TRACE_MODE_READ, file->ef, (void *)(long)call->event.type, &ftrace_event_id_fops); #endif @@ -2443,27 +2446,27 @@ event_create_dir(struct dentry *parent, struct trace_event_file *file) * triggers or filters. */ if (!(call->flags & TRACE_EVENT_FL_IGNORE_ENABLE)) { - trace_create_file("filter", TRACE_MODE_WRITE, file->dir, + eventfs_add_file("filter", TRACE_MODE_WRITE, file->ef, file, &ftrace_event_filter_fops); - trace_create_file("trigger", TRACE_MODE_WRITE, file->dir, + eventfs_add_file("trigger", TRACE_MODE_WRITE, file->ef, file, &event_trigger_fops); } #ifdef CONFIG_HIST_TRIGGERS - trace_create_file("hist", TRACE_MODE_READ, file->dir, file, + eventfs_add_file("hist", TRACE_MODE_READ, file->ef, file, &event_hist_fops); #endif #ifdef CONFIG_HIST_TRIGGERS_DEBUG - trace_create_file("hist_debug", TRACE_MODE_READ, file->dir, file, + eventfs_add_file("hist_debug", TRACE_MODE_READ, file->ef, file, &event_hist_debug_fops); #endif - trace_create_file("format", TRACE_MODE_READ, file->dir, call, + eventfs_add_file("format", TRACE_MODE_READ, file->ef, call, &ftrace_event_format_fops); #ifdef CONFIG_TRACE_EVENT_INJECT if (call->event.type && call->class->reg) - trace_create_file("inject", 0200, file->dir, file, + eventfs_add_file("inject", 0200, file->ef, file, &event_inject_fops); #endif @@ -3616,21 +3619,22 @@ create_event_toplevel_files(struct dentry *parent, struct trace_array *tr) { struct dentry *d_events; struct dentry *entry; + int error = 0; entry = trace_create_file("set_event", TRACE_MODE_WRITE, parent, tr, &ftrace_set_event_fops); if (!entry) return -ENOMEM; - d_events = tracefs_create_dir("events", parent); - if (!d_events) { + d_events = eventfs_create_events_dir("events", parent); + if (IS_ERR(d_events)) { pr_warn("Could not create tracefs 'events' directory\n"); return -ENOMEM; } - entry = trace_create_file("enable", TRACE_MODE_WRITE, d_events, + error = eventfs_add_top_file("enable", TRACE_MODE_WRITE, d_events, tr, &ftrace_tr_enable_fops); - if (!entry) + if (error) return -ENOMEM; /* There are not as crucial, just warn if they are not created */ @@ -3643,11 +3647,11 @@ create_event_toplevel_files(struct dentry *parent, struct trace_array *tr) &ftrace_set_event_notrace_pid_fops); /* ring buffer internal formats */ - trace_create_file("header_page", TRACE_MODE_READ, d_events, + eventfs_add_top_file("header_page", TRACE_MODE_READ, d_events, ring_buffer_print_page_header, &ftrace_show_header_fops); - trace_create_file("header_event", TRACE_MODE_READ, d_events, + eventfs_add_top_file("header_event", TRACE_MODE_READ, d_events, ring_buffer_print_entry_header, &ftrace_show_header_fops); -- 2.7.4