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author | Al Viro <viro@zeniv.linux.org.uk> | 2013-05-16 12:07:31 -0400 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-06-29 12:56:32 +0400 |
commit | f0c3b5093addc8bfe9fe3a5b01acb7ec7969eafa (patch) | |
tree | 3bad119186fd14fa95886cfc73c6953a4dd00e74 /fs/proc/namespaces.c | |
parent | 68c61471138402e34489edc5efde4f0fc5beaa25 (diff) | |
download | linux-f0c3b5093addc8bfe9fe3a5b01acb7ec7969eafa.tar.bz2 |
[readdir] convert procfs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/proc/namespaces.c')
-rw-r--r-- | fs/proc/namespaces.c | 74 |
1 files changed, 18 insertions, 56 deletions
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c index 54bdc6701e9f..f6abbbbfad8a 100644 --- a/fs/proc/namespaces.c +++ b/fs/proc/namespaces.c @@ -213,74 +213,36 @@ out: return error; } -static int proc_ns_fill_cache(struct file *filp, void *dirent, - filldir_t filldir, struct task_struct *task, - const struct proc_ns_operations *ops) +static int proc_ns_dir_readdir(struct file *file, struct dir_context *ctx) { - return proc_fill_cache(filp, dirent, filldir, - ops->name, strlen(ops->name), - proc_ns_instantiate, task, ops); -} - -static int proc_ns_dir_readdir(struct file *filp, void *dirent, - filldir_t filldir) -{ - int i; - struct dentry *dentry = filp->f_path.dentry; - struct inode *inode = dentry->d_inode; - struct task_struct *task = get_proc_task(inode); + struct task_struct *task = get_proc_task(file_inode(file)); const struct proc_ns_operations **entry, **last; - ino_t ino; - int ret; - ret = -ENOENT; if (!task) - goto out_no_task; + return -ENOENT; - ret = 0; - i = filp->f_pos; - switch (i) { - case 0: - ino = inode->i_ino; - if (filldir(dirent, ".", 1, i, ino, DT_DIR) < 0) - goto out; - i++; - filp->f_pos++; - /* fall through */ - case 1: - ino = parent_ino(dentry); - if (filldir(dirent, "..", 2, i, ino, DT_DIR) < 0) - goto out; - i++; - filp->f_pos++; - /* fall through */ - default: - i -= 2; - if (i >= ARRAY_SIZE(ns_entries)) { - ret = 1; - goto out; - } - entry = ns_entries + i; - last = &ns_entries[ARRAY_SIZE(ns_entries) - 1]; - while (entry <= last) { - if (proc_ns_fill_cache(filp, dirent, filldir, - task, *entry) < 0) - goto out; - filp->f_pos++; - entry++; - } + if (!dir_emit_dots(file, ctx)) + goto out; + if (ctx->pos >= 2 + ARRAY_SIZE(ns_entries)) + goto out; + entry = ns_entries + (ctx->pos - 2); + last = &ns_entries[ARRAY_SIZE(ns_entries) - 1]; + while (entry <= last) { + const struct proc_ns_operations *ops = *entry; + if (!proc_fill_cache(file, ctx, ops->name, strlen(ops->name), + proc_ns_instantiate, task, ops)) + break; + ctx->pos++; + entry++; } - - ret = 1; out: put_task_struct(task); -out_no_task: - return ret; + return 0; } const struct file_operations proc_ns_dir_operations = { .read = generic_read_dir, - .readdir = proc_ns_dir_readdir, + .iterate = proc_ns_dir_readdir, }; static struct dentry *proc_ns_dir_lookup(struct inode *dir, |