Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758990AbXLSAdE (ORCPT ); Tue, 18 Dec 2007 19:33:04 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758787AbXLSAcv (ORCPT ); Tue, 18 Dec 2007 19:32:51 -0500 Received: from mfe1.polimi.it ([131.175.12.23]:48988 "EHLO polimi.it" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1758740AbXLSAct (ORCPT ); Tue, 18 Dec 2007 19:32:49 -0500 Date: Wed, 19 Dec 2007 01:27:39 +0100 From: Stefano Brivio To: "John W. Linville" , Greg Kroah-Hartman Cc: Johannes Berg , Mattias Nissler , linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, Stefano Brivio Subject: [PATCH v3 7/8] debugfs: allow access to signed values Message-ID: <20071219012739.6dcdd150@morte> In-Reply-To: <20071219001955.055692620@polimi.it> References: <20071219001955.055692620@polimi.it>> X-Mailer: Claws Mail 3.0.2 (GTK+ 2.12.1; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-PMX-Version: 5.3.3.310218, Antispam-Engine: 2.5.2.311128, Antispam-Data: 2007.11.6.30824 X-PerlMx-Spam: Gauge=II, Probability=22%, Report='RELAY_IN_PBL_11 2.5, RDNS_GENERIC_POOLED 0, RDNS_SUSP 0, RDNS_SUSP_GENERIC 0, RELAY_IN_PBL 0, __CT 0, __CTE 0, __CT_TEXT_PLAIN 0, __HAS_MSGID 0, __HAS_X_MAILER 0, __MIME_TEXT_ONLY 0, __MIME_VERSION 0, __SANE_MSGID 0, __STOCK_PHRASE_24 0, __STOCK_PHRASE_7 0' Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 10708 Lines: 277 Add debugfs_create_s{8,16,32,64}. For these to work properly, we need to remove a cast in libfs. Cc: Johannes Berg To: Greg Kroah-Hartman Signed-off-by: Stefano Brivio --- Greg, here comes an implementation of debugfs_create_s{8,16,32,64} which avoids code duplication, suggested by Johannes Berg. We would need this to be merged to 2.6.25, as we need those functions to be available for rc80211-pid, the new mac80211 rate control algorithm. --- fs/debugfs/file.c | 166 ++++++++++++++++++++++++++++++++++++++++++++++++ fs/libfs.c | 4 - include/linux/debugfs.h | 30 ++++++++ 3 files changed, 197 insertions(+), 3 deletions(-) Index: wireless-2.6/fs/debugfs/file.c =================================================================== --- wireless-2.6.orig/fs/debugfs/file.c +++ wireless-2.6/fs/debugfs/file.c @@ -221,6 +221,172 @@ struct dentry *debugfs_create_u64(const } EXPORT_SYMBOL_GPL(debugfs_create_u64); + +static void debugfs_s8_set(void *data, u64 val) +{ + *(s8 *)data = val; +} +static u64 debugfs_s8_get(void *data) +{ + return *(s8 *)data; +} +DEFINE_SIMPLE_ATTRIBUTE(fops_s8, debugfs_s8_get, debugfs_s8_set, "%lld\n"); + +/** + * debugfs_create_s8 - create a debugfs file that is used to read and write a signed 8-bit value + * @name: a pointer to a string containing the name of the file to create. + * @mode: the permission that the file should have + * @parent: a pointer to the parent dentry for this file. This should be a + * directory dentry if set. If this parameter is %NULL, then the + * file will be created in the root of the debugfs filesystem. + * @value: a pointer to the variable that the file should read to and write + * from. + * + * This function creates a file in debugfs with the given name that + * contains the value of the variable @value. If the @mode variable is so + * set, it can be read from, and written to. + * + * This function will return a pointer to a dentry if it succeeds. This + * pointer must be passed to the debugfs_remove() function when the file is + * to be removed (no automatic cleanup happens if your module is unloaded, + * you are responsible here.) If an error occurs, %NULL will be returned. + * + * If debugfs is not enabled in the kernel, the value -%ENODEV will be + * returned. It is not wise to check for this value, but rather, check for + * %NULL or !%NULL instead as to eliminate the need for #ifdef in the calling + * code. + */ +struct dentry *debugfs_create_s8(const char *name, mode_t mode, + struct dentry *parent, s8 *value) +{ + return debugfs_create_file(name, mode, parent, value, &fops_s8); +} +EXPORT_SYMBOL_GPL(debugfs_create_s8); + +static void debugfs_s16_set(void *data, u64 val) +{ + *(s16 *)data = val; +} +static u64 debugfs_s16_get(void *data) +{ + return *(s16 *)data; +} +DEFINE_SIMPLE_ATTRIBUTE(fops_s16, debugfs_s16_get, debugfs_s16_set, "%lld\n"); + +/** + * debugfs_create_s16 - create a debugfs file that is used to read and write a signed 16-bit value + * @name: a pointer to a string containing the name of the file to create. + * @mode: the permission that the file should have + * @parent: a pointer to the parent dentry for this file. This should be a + * directory dentry if set. If this parameter is %NULL, then the + * file will be created in the root of the debugfs filesystem. + * @value: a pointer to the variable that the file should read to and write + * from. + * + * This function creates a file in debugfs with the given name that + * contains the value of the variable @value. If the @mode variable is so + * set, it can be read from, and written to. + * + * This function will return a pointer to a dentry if it succeeds. This + * pointer must be passed to the debugfs_remove() function when the file is + * to be removed (no automatic cleanup happens if your module is unloaded, + * you are responsible here.) If an error occurs, %NULL will be returned. + * + * If debugfs is not enabled in the kernel, the value -%ENODEV will be + * returned. It is not wise to check for this value, but rather, check for + * %NULL or !%NULL instead as to eliminate the need for #ifdef in the calling + * code. + */ +struct dentry *debugfs_create_s16(const char *name, mode_t mode, + struct dentry *parent, s16 *value) +{ + return debugfs_create_file(name, mode, parent, value, &fops_s16); +} +EXPORT_SYMBOL_GPL(debugfs_create_s16); + +static void debugfs_s32_set(void *data, u64 val) +{ + *(s32 *)data = val; +} +static u64 debugfs_s32_get(void *data) +{ + return *(s32 *)data; +} +DEFINE_SIMPLE_ATTRIBUTE(fops_s32, debugfs_s32_get, debugfs_s32_set, "%lld\n"); + +/** + * debugfs_create_s32 - create a debugfs file that is used to read and write a signed 32-bit value + * @name: a pointer to a string containing the name of the file to create. + * @mode: the permission that the file should have + * @parent: a pointer to the parent dentry for this file. This should be a + * directory dentry if set. If this parameter is %NULL, then the + * file will be created in the root of the debugfs filesystem. + * @value: a pointer to the variable that the file should read to and write + * from. + * + * This function creates a file in debugfs with the given name that + * contains the value of the variable @value. If the @mode variable is so + * set, it can be read from, and written to. + * + * This function will return a pointer to a dentry if it succeeds. This + * pointer must be passed to the debugfs_remove() function when the file is + * to be removed (no automatic cleanup happens if your module is unloaded, + * you are responsible here.) If an error occurs, %NULL will be returned. + * + * If debugfs is not enabled in the kernel, the value -%ENODEV will be + * returned. It is not wise to check for this value, but rather, check for + * %NULL or !%NULL instead as to eliminate the need for #ifdef in the calling + * code. + */ +struct dentry *debugfs_create_s32(const char *name, mode_t mode, + struct dentry *parent, s32 *value) +{ + return debugfs_create_file(name, mode, parent, value, &fops_s32); +} +EXPORT_SYMBOL_GPL(debugfs_create_s32); + +static void debugfs_s64_set(void *data, u64 val) +{ + *(s64 *)data = val; +} + +static u64 debugfs_s64_get(void *data) +{ + return *(s64 *)data; +} +DEFINE_SIMPLE_ATTRIBUTE(fops_s64, debugfs_s64_get, debugfs_s64_set, "%lld\n"); + +/** + * debugfs_create_s64 - create a debugfs file that is used to read and write a signed 64-bit value + * @name: a pointer to a string containing the name of the file to create. + * @mode: the permission that the file should have + * @parent: a pointer to the parent dentry for this file. This should be a + * directory dentry if set. If this parameter is %NULL, then the + * file will be created in the root of the debugfs filesystem. + * @value: a pointer to the variable that the file should read to and write + * from. + * + * This function creates a file in debugfs with the given name that + * contains the value of the variable @value. If the @mode variable is so + * set, it can be read from, and written to. + * + * This function will return a pointer to a dentry if it succeeds. This + * pointer must be passed to the debugfs_remove() function when the file is + * to be removed (no automatic cleanup happens if your module is unloaded, + * you are responsible here.) If an error occurs, %NULL will be returned. + * + * If debugfs is not enabled in the kernel, the value -%ENODEV will be + * returned. It is not wise to check for this value, but rather, check for + * %NULL or !%NULL instead as to eliminate the need for #ifdef in the calling + * code. + */ +struct dentry *debugfs_create_s64(const char *name, mode_t mode, + struct dentry *parent, u64 *value) +{ + return debugfs_create_file(name, mode, parent, value, &fops_s64); +} +EXPORT_SYMBOL_GPL(debugfs_create_s64); + DEFINE_SIMPLE_ATTRIBUTE(fops_x8, debugfs_u8_get, debugfs_u8_set, "0x%02llx\n"); DEFINE_SIMPLE_ATTRIBUTE(fops_x16, debugfs_u16_get, debugfs_u16_set, "0x%04llx\n"); Index: wireless-2.6/fs/libfs.c =================================================================== --- wireless-2.6.orig/fs/libfs.c +++ wireless-2.6/fs/libfs.c @@ -586,7 +586,7 @@ int simple_transaction_release(struct in /* Simple attribute files */ struct simple_attr { - u64 (*get)(void *); + unsigned long long (*get)(void *); void (*set)(void *, u64); char get_buf[24]; /* enough to store a u64 and "\n\0" */ char set_buf[24]; @@ -643,7 +643,7 @@ ssize_t simple_attr_read(struct file *fi else /* first read */ size = scnprintf(attr->get_buf, sizeof(attr->get_buf), attr->fmt, - (unsigned long long)attr->get(attr->data)); + attr->get(attr->data)); ret = simple_read_from_buffer(buf, len, ppos, attr->get_buf, size); mutex_unlock(&attr->mutex); Index: wireless-2.6/include/linux/debugfs.h =================================================================== --- wireless-2.6.orig/include/linux/debugfs.h +++ wireless-2.6/include/linux/debugfs.h @@ -65,7 +65,7 @@ struct dentry *debugfs_create_blob(const #include -/* +/* * We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled * so users have a chance to detect if there was a real error or not. We don't * want to duplicate the design decision mistakes of procfs and devfs again. @@ -128,6 +128,34 @@ static inline struct dentry *debugfs_cre return ERR_PTR(-ENODEV); } +static inline struct dentry *debugfs_create_s8(const char *name, mode_t mode, + struct dentry *parent, + u8 *value) +{ + return ERR_PTR(-ENODEV); +} + +static inline struct dentry *debugfs_create_s16(const char *name, mode_t mode, + struct dentry *parent, + s16 *value) +{ + return ERR_PTR(-ENODEV); +} + +static inline struct dentry *debugfs_create_s32(const char *name, mode_t mode, + struct dentry *parent, + s32 *value) +{ + return ERR_PTR(-ENODEV); +} + +static inline struct dentry *debugfs_create_s64(const char *name, mode_t mode, + struct dentry *parent, + s64 *value) +{ + return ERR_PTR(-ENODEV); +} + static inline struct dentry *debugfs_create_x8(const char *name, mode_t mode, struct dentry *parent, u8 *value) -- Ciao Stefano -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/