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fsnotify: make allow_dups a property of the group

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Instead of passing the allow_dups argument to fsnotify_add_mark()
as an argument, define the group flag FSNOTIFY_GROUP_DUPS to express
the allow_dups behavior and set this behavior at group creation time
for all calls of fsnotify_add_mark().

Rename the allow_dups argument to generic add_flags argument for future
use.

Link: https://lore.kernel.org/r/20220422120327.3459282-6-amir73il@gmail.com
Suggested-by: Jan Kara <jack@suse.cz>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Amir Goldstein 2022-04-22 15:03:16 +03:00 committed by Jan Kara
parent 867a448d58
commit f3010343d9
3 changed files with 15 additions and 14 deletions
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12
fs/notify/mark.c
View File

@ -574,7 +574,7 @@ out:
static int fsnotify_add_mark_list(struct fsnotify_mark *mark,
fsnotify_connp_t *connp,
unsigned int obj_type,
int allow_dups, __kernel_fsid_t *fsid)
int add_flags, __kernel_fsid_t *fsid)
{
struct fsnotify_mark *lmark, *last = NULL;
struct fsnotify_mark_connector *conn;
@ -633,7 +633,7 @@ restart:
if ((lmark->group == mark->group) &&
(lmark->flags & FSNOTIFY_MARK_FLAG_ATTACHED) &&
!allow_dups) {
!(mark->group->flags & FSNOTIFY_GROUP_DUPS)) {
err = -EEXIST;
goto out_err;
}
@ -668,7 +668,7 @@ out_err:
*/
int fsnotify_add_mark_locked(struct fsnotify_mark *mark,
fsnotify_connp_t *connp, unsigned int obj_type,
int allow_dups, __kernel_fsid_t *fsid)
int add_flags, __kernel_fsid_t *fsid)
{
struct fsnotify_group *group = mark->group;
int ret = 0;
@ -688,7 +688,7 @@ int fsnotify_add_mark_locked(struct fsnotify_mark *mark,
fsnotify_get_mark(mark); /* for g_list */
spin_unlock(&mark->lock);
ret = fsnotify_add_mark_list(mark, connp, obj_type, allow_dups, fsid);
ret = fsnotify_add_mark_list(mark, connp, obj_type, add_flags, fsid);
if (ret)
goto err;
@ -708,14 +708,14 @@ err:
}
int fsnotify_add_mark(struct fsnotify_mark *mark, fsnotify_connp_t *connp,
unsigned int obj_type, int allow_dups,
unsigned int obj_type, int add_flags,
__kernel_fsid_t *fsid)
{
int ret;
struct fsnotify_group *group = mark->group;
mutex_lock(&group->mark_mutex);
ret = fsnotify_add_mark_locked(mark, connp, obj_type, allow_dups, fsid);
ret = fsnotify_add_mark_locked(mark, connp, obj_type, add_flags, fsid);
mutex_unlock(&group->mark_mutex);
return ret;
}

13
include/linux/fsnotify_backend.h
View File

@ -211,6 +211,7 @@ struct fsnotify_group {
bool shutdown; /* group is being shut down, don't queue more events */
#define FSNOTIFY_GROUP_USER 0x01 /* user allocated group */
#define FSNOTIFY_GROUP_DUPS 0x02 /* allow multiple marks per object */
int flags;
/* stores all fastpath marks assoc with this group so they can be cleaned on unregister */
@ -641,26 +642,26 @@ extern int fsnotify_get_conn_fsid(const struct fsnotify_mark_connector *conn,
/* attach the mark to the object */
extern int fsnotify_add_mark(struct fsnotify_mark *mark,
fsnotify_connp_t *connp, unsigned int obj_type,
int allow_dups, __kernel_fsid_t *fsid);
int add_flags, __kernel_fsid_t *fsid);
extern int fsnotify_add_mark_locked(struct fsnotify_mark *mark,
fsnotify_connp_t *connp,
unsigned int obj_type, int allow_dups,
unsigned int obj_type, int add_flags,
__kernel_fsid_t *fsid);
/* attach the mark to the inode */
static inline int fsnotify_add_inode_mark(struct fsnotify_mark *mark,
struct inode *inode,
int allow_dups)
int add_flags)
{
return fsnotify_add_mark(mark, &inode->i_fsnotify_marks,
FSNOTIFY_OBJ_TYPE_INODE, allow_dups, NULL);
FSNOTIFY_OBJ_TYPE_INODE, add_flags, NULL);
}
static inline int fsnotify_add_inode_mark_locked(struct fsnotify_mark *mark,
struct inode *inode,
int allow_dups)
int add_flags)
{
return fsnotify_add_mark_locked(mark, &inode->i_fsnotify_marks,
FSNOTIFY_OBJ_TYPE_INODE, allow_dups,
FSNOTIFY_OBJ_TYPE_INODE, add_flags,
NULL);
}

4
kernel/audit_fsnotify.c
View File

@ -100,7 +100,7 @@ struct audit_fsnotify_mark *audit_alloc_mark(struct audit_krule *krule, char *pa
audit_update_mark(audit_mark, dentry->d_inode);
audit_mark->rule = krule;
ret = fsnotify_add_inode_mark(&audit_mark->mark, inode, true);
ret = fsnotify_add_inode_mark(&audit_mark->mark, inode, 0);
if (ret < 0) {
fsnotify_put_mark(&audit_mark->mark);
audit_mark = ERR_PTR(ret);
@ -182,7 +182,7 @@ static const struct fsnotify_ops audit_mark_fsnotify_ops = {
static int __init audit_fsnotify_init(void)
{
audit_fsnotify_group = fsnotify_alloc_group(&audit_mark_fsnotify_ops,
0);
FSNOTIFY_GROUP_DUPS);
if (IS_ERR(audit_fsnotify_group)) {
audit_fsnotify_group = NULL;
audit_panic("cannot create audit fsnotify group");