From 608e266a2d4e62c1b98c1c573064b6afe8c06a58 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 14 Jun 2007 04:27:22 +0900 Subject: sysfs: make kobj point to sysfs_dirent instead of dentry As kobj sysfs dentries and inodes are gonna be made reclaimable, dentry can't be used as naming token for sysfs file/directory, replace kobj->dentry with kobj->sd. The only external interface change is shadow directory handling. All other changes are contained in kobj and sysfs. Signed-off-by: Tejun Heo Signed-off-by: Greg Kroah-Hartman --- fs/sysfs/dir.c | 119 ++++++++++++++++++++++++++++----------------------------- 1 file changed, 59 insertions(+), 60 deletions(-) (limited to 'fs/sysfs/dir.c') diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c index 4762a9aa0b27..31b6cf30636d 100644 --- a/fs/sysfs/dir.c +++ b/fs/sysfs/dir.c @@ -368,9 +368,10 @@ struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd, return sd; } -static int create_dir(struct kobject *kobj, struct dentry *parent, - const char *name, struct dentry **p_dentry) +static int create_dir(struct kobject *kobj, struct sysfs_dirent *parent_sd, + const char *name, struct sysfs_dirent **p_sd) { + struct dentry *parent = parent_sd->s_dentry; int error; umode_t mode = S_IFDIR| S_IRWXU | S_IRUGO | S_IXUGO; struct dentry *dentry; @@ -409,14 +410,14 @@ static int create_dir(struct kobject *kobj, struct dentry *parent, /* link in */ error = -EEXIST; - if (sysfs_find_dirent(parent->d_fsdata, name)) + if (sysfs_find_dirent(parent_sd, name)) goto out_iput; sysfs_instantiate(dentry, inode); inc_nlink(parent->d_inode); - sysfs_attach_dirent(sd, parent->d_fsdata, dentry); + sysfs_attach_dirent(sd, parent_sd, dentry); - *p_dentry = dentry; + *p_sd = sd; error = 0; goto out_unlock; /* pin directory dentry in core */ @@ -433,38 +434,37 @@ static int create_dir(struct kobject *kobj, struct dentry *parent, return error; } - -int sysfs_create_subdir(struct kobject * k, const char * n, struct dentry ** d) +int sysfs_create_subdir(struct kobject *kobj, const char *name, + struct sysfs_dirent **p_sd) { - return create_dir(k,k->dentry,n,d); + return create_dir(kobj, kobj->sd, name, p_sd); } /** * sysfs_create_dir - create a directory for an object. * @kobj: object we're creating directory for. - * @shadow_parent: parent parent object. + * @shadow_parent: parent object. */ - -int sysfs_create_dir(struct kobject * kobj, struct dentry *shadow_parent) +int sysfs_create_dir(struct kobject *kobj, + struct sysfs_dirent *shadow_parent_sd) { - struct dentry * dentry = NULL; - struct dentry * parent; + struct sysfs_dirent *parent_sd, *sd; int error = 0; BUG_ON(!kobj); - if (shadow_parent) - parent = shadow_parent; + if (shadow_parent_sd) + parent_sd = shadow_parent_sd; else if (kobj->parent) - parent = kobj->parent->dentry; + parent_sd = kobj->parent->sd; else if (sysfs_mount && sysfs_mount->mnt_sb) - parent = sysfs_mount->mnt_sb->s_root; + parent_sd = sysfs_mount->mnt_sb->s_root->d_fsdata; else return -EFAULT; - error = create_dir(kobj,parent,kobject_name(kobj),&dentry); + error = create_dir(kobj, parent_sd, kobject_name(kobj), &sd); if (!error) - kobj->dentry = dentry; + kobj->sd = sd; return error; } @@ -525,18 +525,16 @@ const struct inode_operations sysfs_dir_inode_operations = { .setattr = sysfs_setattr, }; -static void remove_dir(struct dentry * d) +static void remove_dir(struct sysfs_dirent *sd) { - struct dentry *parent = d->d_parent; - struct sysfs_dirent *sd = d->d_fsdata; + struct dentry *parent = sd->s_parent->s_dentry; mutex_lock(&parent->d_inode->i_mutex); sysfs_unlink_sibling(sd); sd->s_flags |= SYSFS_FLAG_REMOVED; - pr_debug(" o %s removing done (%d)\n",d->d_name.name, - atomic_read(&d->d_count)); + pr_debug(" o %s removing done\n", sd->s_name); mutex_unlock(&parent->d_inode->i_mutex); @@ -545,25 +543,26 @@ static void remove_dir(struct dentry * d) sysfs_put(sd); } -void sysfs_remove_subdir(struct dentry * d) +void sysfs_remove_subdir(struct sysfs_dirent *sd) { - remove_dir(d); + remove_dir(sd); } -static void __sysfs_remove_dir(struct dentry *dentry) +static void __sysfs_remove_dir(struct sysfs_dirent *dir_sd) { struct sysfs_dirent *removed = NULL; - struct sysfs_dirent *parent_sd; struct sysfs_dirent **pos; + struct dentry *dir; - if (!dentry) + if (!dir_sd) return; - pr_debug("sysfs %s: removing dir\n",dentry->d_name.name); - mutex_lock(&dentry->d_inode->i_mutex); - parent_sd = dentry->d_fsdata; - pos = &parent_sd->s_children; + dir = dir_sd->s_dentry; + + pr_debug("sysfs %s: removing dir\n", dir_sd->s_name); + mutex_lock(&dir->d_inode->i_mutex); + pos = &dir_sd->s_children; while (*pos) { struct sysfs_dirent *sd = *pos; @@ -575,7 +574,7 @@ static void __sysfs_remove_dir(struct dentry *dentry) } else pos = &(*pos)->s_sibling; } - mutex_unlock(&dentry->d_inode->i_mutex); + mutex_unlock(&dir->d_inode->i_mutex); while (removed) { struct sysfs_dirent *sd = removed; @@ -588,7 +587,7 @@ static void __sysfs_remove_dir(struct dentry *dentry) sysfs_put(sd); } - remove_dir(dentry); + remove_dir(dir_sd); } /** @@ -602,25 +601,25 @@ static void __sysfs_remove_dir(struct dentry *dentry) void sysfs_remove_dir(struct kobject * kobj) { - struct dentry *d = kobj->dentry; + struct sysfs_dirent *sd = kobj->sd; spin_lock(&kobj_sysfs_assoc_lock); - kobj->dentry = NULL; + kobj->sd = NULL; spin_unlock(&kobj_sysfs_assoc_lock); - __sysfs_remove_dir(d); + __sysfs_remove_dir(sd); } -int sysfs_rename_dir(struct kobject * kobj, struct dentry *new_parent, +int sysfs_rename_dir(struct kobject *kobj, struct sysfs_dirent *new_parent_sd, const char *new_name) { - struct sysfs_dirent *sd = kobj->dentry->d_fsdata; - struct sysfs_dirent *parent_sd = new_parent->d_fsdata; + struct sysfs_dirent *sd = kobj->sd; + struct dentry *new_parent = new_parent_sd->s_dentry; struct dentry *new_dentry; char *dup_name; int error; - if (!new_parent) + if (!new_parent_sd) return -EFAULT; down_write(&sysfs_rename_sem); @@ -637,9 +636,9 @@ int sysfs_rename_dir(struct kobject * kobj, struct dentry *new_parent, * shadows of the same directory */ error = -EINVAL; - if (kobj->dentry->d_parent->d_inode != new_parent->d_inode || + if (sd->s_parent->s_dentry->d_inode != new_parent->d_inode || new_dentry->d_parent->d_inode != new_parent->d_inode || - new_dentry == kobj->dentry) + new_dentry == sd->s_dentry) goto out_dput; error = -EEXIST; @@ -661,12 +660,12 @@ int sysfs_rename_dir(struct kobject * kobj, struct dentry *new_parent, /* move under the new parent */ d_add(new_dentry, NULL); - d_move(kobj->dentry, new_dentry); + d_move(sd->s_dentry, new_dentry); sysfs_unlink_sibling(sd); - sysfs_get(parent_sd); + sysfs_get(new_parent_sd); sysfs_put(sd->s_parent); - sd->s_parent = parent_sd; + sd->s_parent = new_parent_sd; sysfs_link_sibling(sd); error = 0; @@ -691,9 +690,9 @@ int sysfs_move_dir(struct kobject *kobj, struct kobject *new_parent) int error; old_parent_dentry = kobj->parent ? - kobj->parent->dentry : sysfs_mount->mnt_sb->s_root; + kobj->parent->sd->s_dentry : sysfs_mount->mnt_sb->s_root; new_parent_dentry = new_parent ? - new_parent->dentry : sysfs_mount->mnt_sb->s_root; + new_parent->sd->s_dentry : sysfs_mount->mnt_sb->s_root; if (old_parent_dentry->d_inode == new_parent_dentry->d_inode) return 0; /* nothing to move */ @@ -705,7 +704,7 @@ again: } new_parent_sd = new_parent_dentry->d_fsdata; - sd = kobj->dentry->d_fsdata; + sd = kobj->sd; new_dentry = lookup_one_len(kobj->name, new_parent_dentry, strlen(kobj->name)); @@ -715,7 +714,7 @@ again: } else error = 0; d_add(new_dentry, NULL); - d_move(kobj->dentry, new_dentry); + d_move(sd->s_dentry, new_dentry); dput(new_dentry); /* Remove from old parent's list and insert into new parent's list. */ @@ -885,7 +884,7 @@ int sysfs_make_shadowed_dir(struct kobject *kobj, struct inode *inode; struct inode_operations *i_op; - inode = kobj->dentry->d_inode; + inode = kobj->sd->s_dentry->d_inode; if (inode->i_op != &sysfs_dir_inode_operations) return -EINVAL; @@ -912,16 +911,16 @@ int sysfs_make_shadowed_dir(struct kobject *kobj, * directory. */ -struct dentry *sysfs_create_shadow_dir(struct kobject *kobj) +struct sysfs_dirent *sysfs_create_shadow_dir(struct kobject *kobj) { - struct dentry *dir = kobj->dentry; + struct dentry *dir = kobj->sd->s_dentry; struct inode *inode = dir->d_inode; struct dentry *parent = dir->d_parent; struct sysfs_dirent *parent_sd = parent->d_fsdata; struct dentry *shadow; struct sysfs_dirent *sd; - shadow = ERR_PTR(-EINVAL); + sd = ERR_PTR(-EINVAL); if (!sysfs_is_shadowed_inode(inode)) goto out; @@ -944,25 +943,25 @@ struct dentry *sysfs_create_shadow_dir(struct kobject *kobj) dget(shadow); /* Extra count - pin the dentry in core */ out: - return shadow; + return sd; nomem: dput(shadow); - shadow = ERR_PTR(-ENOMEM); + sd = ERR_PTR(-ENOMEM); goto out; } /** * sysfs_remove_shadow_dir - remove an object's directory. - * @shadow: dentry of shadow directory + * @shadow_sd: sysfs_dirent of shadow directory * * The only thing special about this is that we remove any files in * the directory before we remove the directory, and we've inlined * what used to be sysfs_rmdir() below, instead of calling separately. */ -void sysfs_remove_shadow_dir(struct dentry *shadow) +void sysfs_remove_shadow_dir(struct sysfs_dirent *shadow_sd) { - __sysfs_remove_dir(shadow); + __sysfs_remove_dir(shadow_sd); } const struct file_operations sysfs_dir_operations = { -- cgit v1.2.3