Subject: Re: [PATCH 04/28] proc: Supply PDE attribute setting accessor functions [RFC]

From: Mauro Carvalho Chehab <[email-masked]>
Date: Tue, 16 Apr 2013 18:37:43 -0300

Em 16-04-2013 15:26, David Howells escreveu:
> Supply accessor functions to set attributes in proc_dir_entry structs.
>
> The following are supplied: proc_set_size() and proc_set_user().
>
> Signed-off-by: David Howells <[email-masked]>
> cc: [email-masked]
> cc: [email-masked]
> cc: [email-masked]
> cc: [email-masked]
> cc: [email-masked]
> cc: [email-masked]
> cc: [email-masked]
> ---
>
>   arch/powerpc/kernel/proc_powerpc.c        |    2 +-
>   arch/powerpc/platforms/pseries/reconfig.c |    2 +-
>   drivers/media/pci/ttpci/av7110_ir.c       |    2 +-

Weird that av7110 IR uses /proc... Well, this is an old, obsolete driver for
hardware that is not sold anymore for a long time... So, be it.

Acked-by: Mauro Carvalho Chehab <[email-masked]>

>   drivers/net/irda/vlsi_ir.c                |    2 +-
>   drivers/net/wireless/airo.c               |   34 +++++++++--------------------
>   drivers/pci/proc.c                        |    2 +-
>   fs/proc/generic.c                         |   13 +++++++++++
>   include/linux/proc_fs.h                   |    5 ++++
>   kernel/configs.c                          |    2 +-
>   kernel/profile.c                          |    2 +-
>   net/netfilter/xt_recent.c                 |    3 +--
>   sound/core/info.c                         |    2 +-
>   12 files changed, 38 insertions(+), 33 deletions(-)
>
> diff --git a/arch/powerpc/kernel/proc_powerpc.c b/arch/powerpc/kernel/proc_powerpc.c
> index 41d8ee9..feb8580 100644
> --- a/arch/powerpc/kernel/proc_powerpc.c
> +++ b/arch/powerpc/kernel/proc_powerpc.c
> @@ -83,7 +83,7 @@ static int __init proc_ppc64_init(void)
>   			       &page_map_fops, vdso_data);
>   	if (!pde)
>   		return 1;
> -	pde->size = PAGE_SIZE;
> +	proc_set_size(pde, PAGE_SIZE);
>
>   	return 0;
>   }
> diff --git a/arch/powerpc/platforms/pseries/reconfig.c b/arch/powerpc/platforms/pseries/reconfig.c
> index d6491bd..f93cdf5 100644
> --- a/arch/powerpc/platforms/pseries/reconfig.c
> +++ b/arch/powerpc/platforms/pseries/reconfig.c
> @@ -452,7 +452,7 @@ static int proc_ppc64_create_ofdt(void)
>
>   	ent = proc_create("powerpc/ofdt", S_IWUSR, NULL, &ofdt_fops);
>   	if (ent)
> -		ent->size = 0;
> +		proc_set_size(ent, 0);
>
>   	return 0;
>   }
> diff --git a/drivers/media/pci/ttpci/av7110_ir.c b/drivers/media/pci/ttpci/av7110_ir.c
> index eb82286..0e763a7 100644
> --- a/drivers/media/pci/ttpci/av7110_ir.c
> +++ b/drivers/media/pci/ttpci/av7110_ir.c
> @@ -375,7 +375,7 @@ int av7110_ir_init(struct av7110 *av7110)
>   	if (av_cnt == 1) {
>   		e = proc_create("av7110_ir", S_IWUSR, NULL, &av7110_ir_proc_fops);
>   		if (e)
> -			e->size = 4 + 256 * sizeof(u16);
> +			proc_set_size(e, 4 + 256 * sizeof(u16));
>   	}
>
>   	tasklet_init(&av7110->ir.ir_tasklet, av7110_emit_key, (unsigned long) &av7110->ir);
> diff --git a/drivers/net/irda/vlsi_ir.c b/drivers/net/irda/vlsi_ir.c
> index e22cd4e..5f47584 100644
> --- a/drivers/net/irda/vlsi_ir.c
> +++ b/drivers/net/irda/vlsi_ir.c
> @@ -1678,7 +1678,7 @@ vlsi_irda_probe(struct pci_dev *pdev, const struct pci_device_id *id)
>   			IRDA_WARNING("%s: failed to create proc entry\n",
>   				     __func__);
>   		} else {
> -			ent->size = 0;
> +			proc_set_size(ent, 0);
>   		}
>   		idev->proc_entry = ent;
>   	}
> diff --git a/drivers/net/wireless/airo.c b/drivers/net/wireless/airo.c
> index 66e398d..21d0233 100644
> --- a/drivers/net/wireless/airo.c
> +++ b/drivers/net/wireless/airo.c
> @@ -4507,73 +4507,63 @@ static int setup_proc_entry( struct net_device *dev,
>   					    airo_entry);
>   	if (!apriv->proc_entry)
>   		goto fail;
> -	apriv->proc_entry->uid = proc_kuid;
> -	apriv->proc_entry->gid = proc_kgid;
> +	proc_set_user(apriv->proc_entry, proc_kuid, proc_kgid);
>
>   	/* Setup the StatsDelta */
>   	entry = proc_create_data("StatsDelta", S_IRUGO & proc_perm,
>   				 apriv->proc_entry, &proc_statsdelta_ops, dev);
>   	if (!entry)
>   		goto fail_stats_delta;
> -	entry->uid = proc_kuid;
> -	entry->gid = proc_kgid;
> +	proc_set_user(entry, proc_kuid, proc_kgid);
>
>   	/* Setup the Stats */
>   	entry = proc_create_data("Stats", S_IRUGO & proc_perm,
>   				 apriv->proc_entry, &proc_stats_ops, dev);
>   	if (!entry)
>   		goto fail_stats;
> -	entry->uid = proc_kuid;
> -	entry->gid = proc_kgid;
> +	proc_set_user(entry, proc_kuid, proc_kgid);
>
>   	/* Setup the Status */
>   	entry = proc_create_data("Status", S_IRUGO & proc_perm,
>   				 apriv->proc_entry, &proc_status_ops, dev);
>   	if (!entry)
>   		goto fail_status;
> -	entry->uid = proc_kuid;
> -	entry->gid = proc_kgid;
> +	proc_set_user(entry, proc_kuid, proc_kgid);
>
>   	/* Setup the Config */
>   	entry = proc_create_data("Config", proc_perm,
>   				 apriv->proc_entry, &proc_config_ops, dev);
>   	if (!entry)
>   		goto fail_config;
> -	entry->uid = proc_kuid;
> -	entry->gid = proc_kgid;
> +	proc_set_user(entry, proc_kuid, proc_kgid);
>
>   	/* Setup the SSID */
>   	entry = proc_create_data("SSID", proc_perm,
>   				 apriv->proc_entry, &proc_SSID_ops, dev);
>   	if (!entry)
>   		goto fail_ssid;
> -	entry->uid = proc_kuid;
> -	entry->gid = proc_kgid;
> +	proc_set_user(entry, proc_kuid, proc_kgid);
>
>   	/* Setup the APList */
>   	entry = proc_create_data("APList", proc_perm,
>   				 apriv->proc_entry, &proc_APList_ops, dev);
>   	if (!entry)
>   		goto fail_aplist;
> -	entry->uid = proc_kuid;
> -	entry->gid = proc_kgid;
> +	proc_set_user(entry, proc_kuid, proc_kgid);
>
>   	/* Setup the BSSList */
>   	entry = proc_create_data("BSSList", proc_perm,
>   				 apriv->proc_entry, &proc_BSSList_ops, dev);
>   	if (!entry)
>   		goto fail_bsslist;
> -	entry->uid = proc_kuid;
> -	entry->gid = proc_kgid;
> +	proc_set_user(entry, proc_kuid, proc_kgid);
>
>   	/* Setup the WepKey */
>   	entry = proc_create_data("WepKey", proc_perm,
>   				 apriv->proc_entry, &proc_wepkey_ops, dev);
>   	if (!entry)
>   		goto fail_wepkey;
> -	entry->uid = proc_kuid;
> -	entry->gid = proc_kgid;
> -
> +	proc_set_user(entry, proc_kuid, proc_kgid);
>   	return 0;
>
>   fail_wepkey:
> @@ -5695,10 +5685,8 @@ static int __init airo_init_module( void )
>
>   	airo_entry = proc_mkdir_mode("driver/aironet", airo_perm, NULL);
>
> -	if (airo_entry) {
> -		airo_entry->uid = proc_kuid;
> -		airo_entry->gid = proc_kgid;
> -	}
> +	if (airo_entry)
> +		proc_set_user(airo_entry, proc_kuid, proc_kgid);
>
>   	for (i = 0; i < 4 && io[i] && irq[i]; i++) {
>   		airo_print_info("", "Trying to configure ISA adapter at irq=%d "
> diff --git a/drivers/pci/proc.c b/drivers/pci/proc.c
> index 12e4fb5..7cde7c1 100644
> --- a/drivers/pci/proc.c
> +++ b/drivers/pci/proc.c
> @@ -419,7 +419,7 @@ int pci_proc_attach_device(struct pci_dev *dev)
>   			     &proc_bus_pci_operations, dev);
>   	if (!e)
>   		return -ENOMEM;
> -	e->size = dev->cfg_size;
> +	proc_set_size(e, dev->cfg_size);
>   	dev->procent = e;
>
>   	return 0;
> diff --git a/fs/proc/generic.c b/fs/proc/generic.c
> index 1c07cad..5f6f6c3 100644
> --- a/fs/proc/generic.c
> +++ b/fs/proc/generic.c
> @@ -498,6 +498,19 @@ out:
>   	return NULL;
>   }
>   EXPORT_SYMBOL(proc_create_data);
> +
> +void proc_set_size(struct proc_dir_entry *de, loff_t size)
> +{
> +	de->size = size;
> +}
> +EXPORT_SYMBOL(proc_set_size);
> +
> +void proc_set_user(struct proc_dir_entry *de, kuid_t uid, kgid_t gid)
> +{
> +	de->uid = uid;
> +	de->gid = gid;
> +}
> +EXPORT_SYMBOL(proc_set_user);
>
>   static void free_proc_entry(struct proc_dir_entry *de)
>   {
> diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
> index 805edac..28a4d7e 100644
> --- a/include/linux/proc_fs.h
> +++ b/include/linux/proc_fs.h
> @@ -130,6 +130,9 @@ static inline struct proc_dir_entry *proc_create(const char *name, umode_t mode,
>   extern struct proc_dir_entry *proc_net_mkdir(struct net *net, const char *name,
>   	struct proc_dir_entry *parent);
>
> +extern void proc_set_size(struct proc_dir_entry *, loff_t);
> +extern void proc_set_user(struct proc_dir_entry *, kuid_t, kgid_t);
> +
>   extern struct file *proc_ns_fget(int fd);
>   extern bool proc_ns_inode(struct inode *inode);
>
> @@ -158,6 +161,8 @@ static inline struct proc_dir_entry *proc_mkdir(const char *name,
>   	struct proc_dir_entry *parent) {return NULL;}
>   static inline struct proc_dir_entry *proc_mkdir_mode(const char *name,
>   	umode_t mode, struct proc_dir_entry *parent) { return NULL; }
> +static inline void proc_set_size(struct proc_dir_entry *de, loff_t size) {}
> +static inline void proc_set_user(struct proc_dir_entry *de, kuid_t uid, kgid_t gid) {}
>
>   struct tty_driver;
>   static inline void proc_tty_register_driver(struct tty_driver *driver) {};
> diff --git a/kernel/configs.c b/kernel/configs.c
> index 42e8fa0..c18b1f1 100644
> --- a/kernel/configs.c
> +++ b/kernel/configs.c
> @@ -79,7 +79,7 @@ static int __init ikconfig_init(void)
>   	if (!entry)
>   		return -ENOMEM;
>
> -	entry->size = kernel_config_data_size;
> +	proc_set_size(entry, kernel_config_data_size);
>
>   	return 0;
>   }
> diff --git a/kernel/profile.c b/kernel/profile.c
> index 524ce5e..0bf4007 100644
> --- a/kernel/profile.c
> +++ b/kernel/profile.c
> @@ -600,7 +600,7 @@ int __ref create_proc_profile(void) /* false positive from hotcpu_notifier */
>   			    NULL, &proc_profile_operations);
>   	if (!entry)
>   		return 0;
> -	entry->size = (1+prof_len) * sizeof(atomic_t);
> +	proc_set_size(entry, (1 + prof_len) * sizeof(atomic_t));
>   	hotcpu_notifier(profile_cpu_callback, 0);
>   	return 0;
>   }
> diff --git a/net/netfilter/xt_recent.c b/net/netfilter/xt_recent.c
> index 3db2d38..1e657cf 100644
> --- a/net/netfilter/xt_recent.c
> +++ b/net/netfilter/xt_recent.c
> @@ -401,8 +401,7 @@ static int recent_mt_check(const struct xt_mtchk_param *par,
>   		ret = -ENOMEM;
>   		goto out;
>   	}
> -	pde->uid = uid;
> -	pde->gid = gid;
> +	proc_set_user(pde, uid, gid);
>   #endif
>   	spin_lock_bh(&recent_lock);
>   	list_add_tail(&t->list, &recent_net->tables);
> diff --git a/sound/core/info.c b/sound/core/info.c
> index 3aa8864..c7f41c3 100644
> --- a/sound/core/info.c
> +++ b/sound/core/info.c
> @@ -970,7 +970,7 @@ int snd_info_register(struct snd_info_entry * entry)
>   			mutex_unlock(&info_mutex);
>   			return -ENOMEM;
>   		}
> -		p->size = entry->size;
> +		proc_set_size(p, entry->size);
>   	}
>   	entry->p = p;
>   	if (entry->parent)
>
> --
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