diff options
| author | Tejun Heo <tj@kernel.org> | 2013-11-23 17:21:52 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-11-27 13:57:57 -0800 |
| commit | 5d60418e54751c856f5aecc308620fde9572e481 (patch) | |
| tree | 364f8e338ee33fbd0186c53ed962438255746854 /fs/sysfs | |
| parent | 890ece160c6465b49c42975d529c3481d89da8f5 (diff) | |
| download | linux-5d60418e54751c856f5aecc308620fde9572e481.tar.bz2 | |
sysfs, kernfs: introduce kernfs_setattr()
Introduce kernfs setattr interface - kernfs_setattr().
sysfs_sd_setattr() is renamed to __kernfs_setattr() and
kernfs_setattr() is a simple wrapper around it with sysfs_mutex
locking. sysfs_chmod_file() is updated to get an explicit ref on
kobj->sd and then invoke kernfs_setattr() so that it doesn't have to
use internal interface.
This patch doesn't introduce any behavior differences.
v2: Dummy implementation for !CONFIG_SYSFS updated to return -ENOSYS.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/sysfs')
| -rw-r--r-- | fs/sysfs/file.c | 13 | ||||
| -rw-r--r-- | fs/sysfs/inode.c | 21 | ||||
| -rw-r--r-- | fs/sysfs/sysfs.h | 1 |
3 files changed, 24 insertions, 11 deletions
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index 5664410136ba..564abd201afb 100644 --- a/fs/sysfs/file.c +++ b/fs/sysfs/file.c @@ -922,19 +922,16 @@ int sysfs_chmod_file(struct kobject *kobj, const struct attribute *attr, struct iattr newattrs; int rc; - mutex_lock(&sysfs_mutex); - - rc = -ENOENT; - sd = sysfs_find_dirent(kobj->sd, attr->name, NULL); + sd = sysfs_get_dirent(kobj->sd, attr->name); if (!sd) - goto out; + return -ENOENT; newattrs.ia_mode = (mode & S_IALLUGO) | (sd->s_mode & ~S_IALLUGO); newattrs.ia_valid = ATTR_MODE; - rc = sysfs_sd_setattr(sd, &newattrs); - out: - mutex_unlock(&sysfs_mutex); + rc = kernfs_setattr(sd, &newattrs); + + sysfs_put(sd); return rc; } EXPORT_SYMBOL_GPL(sysfs_chmod_file); diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c index 1750f790af3b..5f7e2afb3457 100644 --- a/fs/sysfs/inode.c +++ b/fs/sysfs/inode.c @@ -67,7 +67,7 @@ static struct sysfs_inode_attrs *sysfs_init_inode_attrs(struct sysfs_dirent *sd) return attrs; } -int sysfs_sd_setattr(struct sysfs_dirent *sd, struct iattr *iattr) +static int __kernfs_setattr(struct sysfs_dirent *sd, const struct iattr *iattr) { struct sysfs_inode_attrs *sd_attrs; struct iattr *iattrs; @@ -102,6 +102,23 @@ int sysfs_sd_setattr(struct sysfs_dirent *sd, struct iattr *iattr) return 0; } +/** + * kernfs_setattr - set iattr on a node + * @sd: target node + * @iattr: iattr to set + * + * Returns 0 on success, -errno on failure. + */ +int kernfs_setattr(struct sysfs_dirent *sd, const struct iattr *iattr) +{ + int ret; + + mutex_lock(&sysfs_mutex); + ret = __kernfs_setattr(sd, iattr); + mutex_unlock(&sysfs_mutex); + return ret; +} + int sysfs_setattr(struct dentry *dentry, struct iattr *iattr) { struct inode *inode = dentry->d_inode; @@ -116,7 +133,7 @@ int sysfs_setattr(struct dentry *dentry, struct iattr *iattr) if (error) goto out; - error = sysfs_sd_setattr(sd, iattr); + error = __kernfs_setattr(sd, iattr); if (error) goto out; diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h index 8b3fc210b90d..2abccfdd932e 100644 --- a/fs/sysfs/sysfs.h +++ b/fs/sysfs/sysfs.h @@ -207,7 +207,6 @@ static inline void __sysfs_put(struct sysfs_dirent *sd) */ struct inode *sysfs_get_inode(struct super_block *sb, struct sysfs_dirent *sd); void sysfs_evict_inode(struct inode *inode); -int sysfs_sd_setattr(struct sysfs_dirent *sd, struct iattr *iattr); int sysfs_permission(struct inode *inode, int mask); int sysfs_setattr(struct dentry *dentry, struct iattr *iattr); int sysfs_getattr(struct vfsmount *mnt, struct dentry *dentry, |