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author | Al Viro <viro@zeniv.linux.org.uk> | 2013-05-16 18:31:02 (GMT) |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-06-29 08:56:36 (GMT) |
commit | d55fea8ddb9a7eb8ce2f4cb859f402ea9968e61b (patch) | |
tree | b4cf38e2e65c02d262a737ca25cb8cb8e1f201e9 /fs | |
parent | d81a8ef59802d2d8908466d631573a3644c313d5 (diff) | |
download | linux-d55fea8ddb9a7eb8ce2f4cb859f402ea9968e61b.tar.xz |
[readdir] convert sysfs
get rid of the kludges in sysfs_readdir()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/sysfs/dir.c | 66 |
1 files changed, 18 insertions, 48 deletions
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c index e8e0e71..4cfd742 100644 --- a/fs/sysfs/dir.c +++ b/fs/sysfs/dir.c @@ -998,68 +998,38 @@ static struct sysfs_dirent *sysfs_dir_next_pos(const void *ns, return pos; } -static int sysfs_readdir(struct file * filp, void * dirent, filldir_t filldir) +static int sysfs_readdir(struct file *file, struct dir_context *ctx) { - struct dentry *dentry = filp->f_path.dentry; + struct dentry *dentry = file->f_path.dentry; struct sysfs_dirent * parent_sd = dentry->d_fsdata; - struct sysfs_dirent *pos = filp->private_data; + struct sysfs_dirent *pos = file->private_data; enum kobj_ns_type type; const void *ns; - ino_t ino; - loff_t off; type = sysfs_ns_type(parent_sd); ns = sysfs_info(dentry->d_sb)->ns[type]; - if (filp->f_pos == 0) { - ino = parent_sd->s_ino; - if (filldir(dirent, ".", 1, filp->f_pos, ino, DT_DIR) == 0) - filp->f_pos++; - else - return 0; - } - if (filp->f_pos == 1) { - if (parent_sd->s_parent) - ino = parent_sd->s_parent->s_ino; - else - ino = parent_sd->s_ino; - if (filldir(dirent, "..", 2, filp->f_pos, ino, DT_DIR) == 0) - filp->f_pos++; - else - return 0; - } + if (!dir_emit_dots(file, ctx)) + return 0; mutex_lock(&sysfs_mutex); - off = filp->f_pos; - for (pos = sysfs_dir_pos(ns, parent_sd, filp->f_pos, pos); + for (pos = sysfs_dir_pos(ns, parent_sd, ctx->pos, pos); pos; - pos = sysfs_dir_next_pos(ns, parent_sd, filp->f_pos, pos)) { - const char * name; - unsigned int type; - int len, ret; - - name = pos->s_name; - len = strlen(name); - ino = pos->s_ino; - type = dt_type(pos); - off = filp->f_pos = pos->s_hash; - filp->private_data = sysfs_get(pos); + pos = sysfs_dir_next_pos(ns, parent_sd, ctx->pos, pos)) { + const char *name = pos->s_name; + unsigned int type = dt_type(pos); + int len = strlen(name); + ino_t ino = pos->s_ino; + ctx->pos = pos->s_hash; + file->private_data = sysfs_get(pos); mutex_unlock(&sysfs_mutex); - ret = filldir(dirent, name, len, off, ino, type); + if (!dir_emit(ctx, name, len, ino, type)) + return 0; mutex_lock(&sysfs_mutex); - if (ret < 0) - break; } mutex_unlock(&sysfs_mutex); - - /* don't reference last entry if its refcount is dropped */ - if (!pos) { - filp->private_data = NULL; - - /* EOF and not changed as 0 or 1 in read/write path */ - if (off == filp->f_pos && off > 1) - filp->f_pos = INT_MAX; - } + file->private_data = NULL; + ctx->pos = INT_MAX; return 0; } @@ -1077,7 +1047,7 @@ static loff_t sysfs_dir_llseek(struct file *file, loff_t offset, int whence) const struct file_operations sysfs_dir_operations = { .read = generic_read_dir, - .readdir = sysfs_readdir, + .iterate = sysfs_readdir, .release = sysfs_dir_release, .llseek = sysfs_dir_llseek, }; |