mir/criu
2
0
Fork 0
mirror of https://github.com/checkpoint-restore/criu synced 2025-08-31 14:25:49 +00:00
Code Issues Releases Wiki Activity

files-reg: Add a few helpers to access ghost files remaps from inotify

Browse Source 
The remap_put will be needed to defer unlinking of ghost files
if they are referred from inotify system.

The lookup_remap is needed to figure out if the watch
target the inotify has present in ghost files list.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Cyrill Gorcunov
2012-12-06 11:10:14 +04:00
committed by Pavel Emelyanov
parent 746ac3fee5
commit 7bd34c699e
2 changed files with 30 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
files-reg.c
View File

@@ -244,6 +244,33 @@ static int dump_ghost_file(int _fd, u32 id, const struct stat *st)
return 0;
}
void remap_put(struct file_remap *remap)
{
mutex_lock(ghost_file_mutex);
if (--remap->users == 0) {
pr_info("Unlink the ghost %s\n", remap->path);
unlink(remap->path);
}
mutex_unlock(ghost_file_mutex);
}
struct file_remap *lookup_ghost_remap(u32 dev, u32 ino)
{
struct ghost_file *gf;
mutex_lock(ghost_file_mutex);
list_for_each_entry(gf, &ghost_files, list) {
if (gf->dev == dev && gf->ino == ino) {
gf->remap.users++;
mutex_unlock(ghost_file_mutex);
return &gf->remap;
}
}
mutex_unlock(ghost_file_mutex);
return NULL;
}
static int dump_ghost_remap(char *path, const struct stat *st, int lfd, u32 id)
{
struct ghost_file *gf;

3
include/files-reg.h
View File

@@ -33,4 +33,7 @@ extern int prepare_shared_reg_files(void);
extern int dump_reg_file(struct fd_parms *p, int lfd, const struct cr_fdset *cr_fdset);
extern int dump_one_reg_file(int lfd, u32 id, const struct fd_parms *p);
extern struct file_remap *lookup_ghost_remap(u32 dev, u32 ino);
extern void remap_put(struct file_remap *remap);
#endif /* FILES_REG_H__ */