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files: Add file_desc_init helper

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To use it in tty code even when file
descriptor is not added into files chain.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Tycho Andersen <tycho.andersen@canonical.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Cyrill Gorcunov
2014-10-16 14:27:23 +04:00
committed by Pavel Emelyanov
parent 09aa15c7a3
commit 81c598cc05
2 changed files with 11 additions and 5 deletions
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15
files.c
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@@ -60,14 +60,19 @@ int prepare_shared_fdinfo(void)
return 0; return 0;
} }
void file_desc_init(struct file_desc *d, u32 id, struct file_desc_ops *ops)
{
INIT_LIST_HEAD(&d->fd_info_head);
INIT_HLIST_NODE(&d->hash);
d->id = id;
d->ops = ops;
}
int file_desc_add(struct file_desc *d, u32 id, struct file_desc_ops *ops) int file_desc_add(struct file_desc *d, u32 id, struct file_desc_ops *ops)
{ {
d->id = id; file_desc_init(d, id, ops);
d->ops = ops;
INIT_LIST_HEAD(&d->fd_info_head);
hlist_add_head(&d->hash, &file_desc_hash[id % FDESC_HASH_SIZE]); hlist_add_head(&d->hash, &file_desc_hash[id % FDESC_HASH_SIZE]);
return 0; /* this is to make tail-calls in collect_one_foo look nice */ return 0; /* this is to make tail-calls in collect_one_foo look nice */
} }

1
include/files.h
View File

@@ -135,6 +135,7 @@ int dump_task_files_seized(struct parasite_ctl *ctl, struct pstree_item *item,
struct parasite_drain_fd *dfds); struct parasite_drain_fd *dfds);
int predump_task_files(int pid); int predump_task_files(int pid);
extern void file_desc_init(struct file_desc *d, u32 id, struct file_desc_ops *ops);
extern int file_desc_add(struct file_desc *d, u32 id, struct file_desc_ops *ops); extern int file_desc_add(struct file_desc *d, u32 id, struct file_desc_ops *ops);
extern struct fdinfo_list_entry *file_master(struct file_desc *d); extern struct fdinfo_list_entry *file_master(struct file_desc *d);
extern struct file_desc *find_file_desc_raw(int type, u32 id); extern struct file_desc *find_file_desc_raw(int type, u32 id);