Make the inodes the default management vehicle for struct efivar_entry, so they are now all freed automatically if the file is removed and on unmount in kill_litter_super(). Remove the now superfluous iterator to free the entries after kill_litter_super(). Also fixes a bug where some entry freeing was missing causing efivarfs to leak memory. Signed-off-by: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> --- fs/efivarfs/internal.h | 1 - fs/efivarfs/super.c | 15 +++++++-------- fs/efivarfs/vars.c | 39 +++------------------------------------ 3 files changed, 10 insertions(+), 45 deletions(-) diff --git a/fs/efivarfs/internal.h b/fs/efivarfs/internal.h index 84a36e6fb653..d768bfa7f12b 100644 --- a/fs/efivarfs/internal.h +++ b/fs/efivarfs/internal.h @@ -37,7 +37,6 @@ int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *, int efivar_entry_add(struct efivar_entry *entry, struct list_head *head); void __efivar_entry_add(struct efivar_entry *entry, struct list_head *head); -void efivar_entry_remove(struct efivar_entry *entry); int efivar_entry_delete(struct efivar_entry *entry); int efivar_entry_size(struct efivar_entry *entry, unsigned long *size); diff --git a/fs/efivarfs/super.c b/fs/efivarfs/super.c index dc3870ae784b..70b99f58c906 100644 --- a/fs/efivarfs/super.c +++ b/fs/efivarfs/super.c @@ -41,6 +41,12 @@ static int efivarfs_ops_notifier(struct notifier_block *nb, unsigned long event, static void efivarfs_evict_inode(struct inode *inode) { + struct efivar_entry *entry = inode->i_private; + + if (entry) { + list_del(&entry->list); + kfree(entry); + } clear_inode(inode); } @@ -269,13 +275,6 @@ static int efivarfs_callback(efi_char16_t *name16, efi_guid_t vendor, return err; } -static int efivarfs_destroy(struct efivar_entry *entry, void *data) -{ - efivar_entry_remove(entry); - kfree(entry); - return 0; -} - enum { Opt_uid, Opt_gid, }; @@ -398,7 +397,7 @@ static void efivarfs_kill_sb(struct super_block *sb) kill_litter_super(sb); /* Remove all entries and destroy */ - efivar_entry_iter(efivarfs_destroy, &sfi->efivarfs_list, NULL); + WARN_ON(!list_empty(&sfi->efivarfs_list)); kfree(sfi); } diff --git a/fs/efivarfs/vars.c b/fs/efivarfs/vars.c index f6380fdbe173..bda8e8b869e8 100644 --- a/fs/efivarfs/vars.c +++ b/fs/efivarfs/vars.c @@ -485,34 +485,6 @@ void __efivar_entry_add(struct efivar_entry *entry, struct list_head *head) list_add(&entry->list, head); } -/** - * efivar_entry_remove - remove entry from variable list - * @entry: entry to remove from list - * - * Returns 0 on success, or a kernel error code on failure. - */ -void efivar_entry_remove(struct efivar_entry *entry) -{ - list_del(&entry->list); -} - -/* - * efivar_entry_list_del_unlock - remove entry from variable list - * @entry: entry to remove - * - * Remove @entry from the variable list and release the list lock. - * - * NOTE: slightly weird locking semantics here - we expect to be - * called with the efivars lock already held, and we release it before - * returning. This is because this function is usually called after - * set_variable() while the lock is still held. - */ -static void efivar_entry_list_del_unlock(struct efivar_entry *entry) -{ - list_del(&entry->list); - efivar_unlock(); -} - /** * efivar_entry_delete - delete variable and remove entry from list * @entry: entry containing variable to delete @@ -536,12 +508,10 @@ int efivar_entry_delete(struct efivar_entry *entry) status = efivar_set_variable_locked(entry->var.VariableName, &entry->var.VendorGuid, 0, 0, NULL, false); - if (!(status == EFI_SUCCESS || status == EFI_NOT_FOUND)) { - efivar_unlock(); + efivar_unlock(); + if (!(status == EFI_SUCCESS || status == EFI_NOT_FOUND)) return efi_status_to_err(status); - } - efivar_entry_list_del_unlock(entry); return 0; } @@ -679,10 +649,7 @@ int efivar_entry_set_get_size(struct efivar_entry *entry, u32 attributes, &entry->var.VendorGuid, NULL, size, NULL); - if (status == EFI_NOT_FOUND) - efivar_entry_list_del_unlock(entry); - else - efivar_unlock(); + efivar_unlock(); if (status && status != EFI_BUFFER_TOO_SMALL) return efi_status_to_err(status); -- 2.35.3