Messages in this thread Patch in this message | | | Date | Mon, 29 Dec 2003 15:06:30 +0530 | From | Maneesh Soni <> | Subject | [RFC 5/5] sysfs backing store (leaves only) - sysfs-leaves-misc.patch |
| |
o This patch has the changes require for attribute groups and symlinks, and misc. routines.
fs/sysfs/group.c | 2 - fs/sysfs/symlink.c | 2 + fs/sysfs/sysfs.h | 70 ++++++++++++++++++++++++++++++++++++++++++++++++++++- 3 files changed, 72 insertions(+), 2 deletions(-)
diff -puN fs/sysfs/symlink.c~sysfs-leaves-misc fs/sysfs/symlink.c --- linux-2.6.0/fs/sysfs/symlink.c~sysfs-leaves-misc 2003-12-29 14:39:03.000000000 +0530 +++ linux-2.6.0-maneesh/fs/sysfs/symlink.c 2003-12-29 14:39:36.000000000 +0530 @@ -25,6 +25,8 @@ static int sysfs_symlink(struct inode * error = page_symlink(dentry->d_inode, symname, l); if (error) iput(dentry->d_inode); + else + d_rehash(dentry); } return error; } diff -puN fs/sysfs/group.c~sysfs-leaves-misc fs/sysfs/group.c --- linux-2.6.0/fs/sysfs/group.c~sysfs-leaves-misc 2003-12-29 14:39:03.000000000 +0530 +++ linux-2.6.0-maneesh/fs/sysfs/group.c 2003-12-29 14:39:03.000000000 +0530 @@ -31,7 +31,7 @@ static int create_files(struct dentry * int error = 0; for (attr = grp->attrs; *attr && !error; attr++) { - error = sysfs_add_file(dir,*attr); + error = sysfs_add_file(dir, SYSFS_KOBJ_ATTR, * attr); } if (error) remove_files(dir,grp); diff -puN fs/sysfs/sysfs.h~sysfs-leaves-misc fs/sysfs/sysfs.h --- linux-2.6.0/fs/sysfs/sysfs.h~sysfs-leaves-misc 2003-12-29 14:39:03.000000000 +0530 +++ linux-2.6.0-maneesh/fs/sysfs/sysfs.h 2003-12-29 14:39:03.000000000 +0530 @@ -1,4 +1,5 @@ +#include <linux/fs.h> extern struct vfsmount * sysfs_mount; extern struct inode * sysfs_new_inode(mode_t mode); @@ -6,8 +7,75 @@ extern int sysfs_create(struct dentry *, extern struct dentry * sysfs_get_dentry(struct dentry *, const char *); -extern int sysfs_add_file(struct dentry * dir, const struct attribute * attr); +extern int sysfs_add_file(struct dentry *, int, const struct attribute *); extern void sysfs_hash_and_remove(struct dentry * dir, const char * name); extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **); extern void sysfs_remove_subdir(struct dentry *); + +extern loff_t sysfs_dir_lseek(struct file *, loff_t, int); +extern int sysfs_readdir(struct file *, void *, filldir_t); +extern void sysfs_umount_begin(struct super_block *); +extern char * sysfs_get_name(struct sysfs_dirent *); +extern struct dentry * sysfs_lookup(struct inode *, struct dentry *, struct nameidata *); + +extern struct file_operations sysfs_file_operations; +extern struct file_operations bin_fops; +extern struct inode_operations sysfs_dir_inode_operations; +extern struct file_operations sysfs_dir_operations; + + +static inline +struct sysfs_dirent * sysfs_new_dirent(struct sysfs_dirent * p, void * e, int t) +{ + struct sysfs_dirent * sd; + + sd = kmalloc(sizeof(*sd), GFP_KERNEL); + if (!sd) + return NULL; + memset(sd, 0, sizeof(*sd)); + atomic_set(&sd->s_count, 1); + sd->s_element = e; + sd->s_type = t; + sd->s_dentry = NULL; + INIT_LIST_HEAD(&sd->s_children); + list_add(&sd->s_sibling, &p->s_children); + + return sd; +} + +static inline struct sysfs_dirent * sysfs_get(struct sysfs_dirent * sd) +{ + if (sd) { + WARN_ON(!atomic_read(&sd->s_count)); + atomic_inc(&sd->s_count); + } + return sd; +} + +static inline void sysfs_put(struct sysfs_dirent * sd) +{ + if (atomic_dec_and_test(&sd->s_count)) + kfree(sd); +} + +static inline +void sysfs_remove_attr_dirent(struct sysfs_dirent * sd, const char * name) +{ + struct list_head * tmp; + + tmp = sd->s_children.next; + while (tmp != & sd->s_children) { + struct sysfs_dirent * tmp_sd; + tmp_sd = list_entry(tmp, struct sysfs_dirent, s_sibling); + tmp = tmp->next; + if ((tmp_sd->s_type == SYSFS_KOBJ_ATTR) || + (tmp_sd->s_type == SYSFS_KOBJ_BIN_ATTR)) { + if (!strcmp(sysfs_get_name(tmp_sd), name)) { + list_del_init(&tmp_sd->s_sibling); + sysfs_put(tmp_sd); + } + } + } +} + _ -- Maneesh Soni Linux Technology Center, IBM Software Lab, Bangalore, India email: maneesh@in.ibm.com Phone: 91-80-5044999 Fax: 91-80-5268553 T/L : 9243696 - 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/
| |