diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/debugfs/file.c | 43 | ||||
| -rw-r--r-- | fs/gfs2/Kconfig | 5 | ||||
| -rw-r--r-- | fs/sysfs/dir.c | 2 | ||||
| -rw-r--r-- | fs/sysfs/file.c | 10 | ||||
| -rw-r--r-- | fs/sysfs/inode.c | 2 |
5 files changed, 52 insertions, 10 deletions
diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c index c5ca6ae..6314629 100644 --- a/fs/debugfs/file.c +++ b/fs/debugfs/file.c @@ -21,6 +21,7 @@ #include <linux/debugfs.h> #include <linux/io.h> #include <linux/slab.h> +#include <linux/atomic.h> static ssize_t default_read_file(struct file *file, char __user *buf, size_t count, loff_t *ppos) @@ -403,6 +404,47 @@ struct dentry *debugfs_create_size_t(const char *name, umode_t mode, } EXPORT_SYMBOL_GPL(debugfs_create_size_t); +static int debugfs_atomic_t_set(void *data, u64 val) +{ + atomic_set((atomic_t *)data, val); + return 0; +} +static int debugfs_atomic_t_get(void *data, u64 *val) +{ + *val = atomic_read((atomic_t *)data); + return 0; +} +DEFINE_SIMPLE_ATTRIBUTE(fops_atomic_t, debugfs_atomic_t_get, + debugfs_atomic_t_set, "%lld\n"); +DEFINE_SIMPLE_ATTRIBUTE(fops_atomic_t_ro, debugfs_atomic_t_get, NULL, "%lld\n"); +DEFINE_SIMPLE_ATTRIBUTE(fops_atomic_t_wo, NULL, debugfs_atomic_t_set, "%lld\n"); + +/** + * debugfs_create_atomic_t - create a debugfs file that is used to read and + * write an atomic_t 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. + */ +struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode, + struct dentry *parent, atomic_t *value) +{ + /* if there are no write bits set, make read only */ + if (!(mode & S_IWUGO)) + return debugfs_create_file(name, mode, parent, value, + &fops_atomic_t_ro); + /* if there are no read bits set, make write only */ + if (!(mode & S_IRUGO)) + return debugfs_create_file(name, mode, parent, value, + &fops_atomic_t_wo); + + return debugfs_create_file(name, mode, parent, value, &fops_atomic_t); +} +EXPORT_SYMBOL_GPL(debugfs_create_atomic_t); static ssize_t read_file_bool(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) @@ -431,6 +473,7 @@ static ssize_t write_file_bool(struct file *file, const char __user *user_buf, if (copy_from_user(buf, user_buf, buf_size)) return -EFAULT; + buf[buf_size] = '\0'; if (strtobool(buf, &bv) == 0) *val = bv; diff --git a/fs/gfs2/Kconfig b/fs/gfs2/Kconfig index 5a376ab..90c6a8f 100644 --- a/fs/gfs2/Kconfig +++ b/fs/gfs2/Kconfig @@ -20,13 +20,12 @@ config GFS2_FS be found here: http://sources.redhat.com/cluster The "nolock" lock module is now built in to GFS2 by default. If - you want to use the DLM, be sure to enable HOTPLUG and IPv4/6 - networking. + you want to use the DLM, be sure to enable IPv4/6 networking. config GFS2_FS_LOCKING_DLM bool "GFS2 DLM locking" depends on (GFS2_FS!=n) && NET && INET && (IPV6 || IPV6=n) && \ - HOTPLUG && CONFIGFS_FS && SYSFS && (DLM=y || DLM=GFS2_FS) + CONFIGFS_FS && SYSFS && (DLM=y || DLM=GFS2_FS) help Multiple node locking module for GFS2 diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c index 4cfd742..e068e74 100644 --- a/fs/sysfs/dir.c +++ b/fs/sysfs/dir.c @@ -74,7 +74,7 @@ static int sysfs_sd_compare(const struct sysfs_dirent *left, } /** - * sysfs_link_subling - link sysfs_dirent into sibling rbtree + * sysfs_link_sibling - link sysfs_dirent into sibling rbtree * @sd: sysfs_dirent of interest * * Link @sd into its sibling rbtree which starts from diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index 602f56d..d2bb7ed 100644 --- a/fs/sysfs/file.c +++ b/fs/sysfs/file.c @@ -449,10 +449,12 @@ void sysfs_notify_dirent(struct sysfs_dirent *sd) spin_lock_irqsave(&sysfs_open_dirent_lock, flags); - od = sd->s_attr.open; - if (od) { - atomic_inc(&od->event); - wake_up_interruptible(&od->poll); + if (!WARN_ON(sysfs_type(sd) != SYSFS_KOBJ_ATTR)) { + od = sd->s_attr.open; + if (od) { + atomic_inc(&od->event); + wake_up_interruptible(&od->poll); + } } spin_unlock_irqrestore(&sysfs_open_dirent_lock, flags); diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c index 0ce3ccf..3e2837a 100644 --- a/fs/sysfs/inode.c +++ b/fs/sysfs/inode.c @@ -24,8 +24,6 @@ #include <linux/security.h> #include "sysfs.h" -extern struct super_block * sysfs_sb; - static const struct address_space_operations sysfs_aops = { .readpage = simple_readpage, .write_begin = simple_write_begin, |
