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Date: Sun, 16 Mar 2014 15:53:30 +0000
From: Anton Altaparmakov <anton@...era.com>
To: Fabian Frederick <fabf@...net.be>
Cc: linux-kernel <linux-kernel@...r.kernel.org>,
akpm <akpm@...ux-foundation.org>, Joe Perches <joe@...ches.com>
Subject: Re: [PATCH 1/1] NTFS: Logging clean-up
Hi,
Looks good, thanks. You can add my Acked-by if you like. Can I assume you have test it builds?
Andrew, can you please merge this via your patch series? Thanks!
Best regards,
Anton
On 16 Mar 2014, at 12:27, Fabian Frederick <fabf@...net.be> wrote:
> -All printk(KERN_foo converted to pr_foo().
> -Add pr_fmt and remove redundant prefixes.
> -Convert spinlock/static array to va_format (inspired by Joe Perches help
> on previous logging patches).
>
> Signed-off-by: Fabian Frederick <fabf@...net.be>
> ---
> fs/ntfs/debug.c | 54 ++++++++++++++++++++++--------------------------------
> fs/ntfs/super.c | 28 ++++++++++++----------------
> 2 files changed, 34 insertions(+), 48 deletions(-)
>
> diff --git a/fs/ntfs/debug.c b/fs/ntfs/debug.c
> index 807150e..607ff92 100644
> --- a/fs/ntfs/debug.c
> +++ b/fs/ntfs/debug.c
> @@ -18,16 +18,9 @@
> * distribution in the file COPYING); if not, write to the Free Software
> * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> */
> -
> +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
> #include "debug.h"
>
> -/*
> - * A static buffer to hold the error string being displayed and a spinlock
> - * to protect concurrent accesses to it.
> - */
> -static char err_buf[1024];
> -static DEFINE_SPINLOCK(err_buf_lock);
> -
> /**
> * __ntfs_warning - output a warning to the syslog
> * @function: name of function outputting the warning
> @@ -50,6 +43,7 @@ static DEFINE_SPINLOCK(err_buf_lock);
> void __ntfs_warning(const char *function, const struct super_block *sb,
> const char *fmt, ...)
> {
> + struct va_format vaf;
> va_list args;
> int flen = 0;
>
> @@ -59,17 +53,15 @@ void __ntfs_warning(const char *function, const struct super_block *sb,
> #endif
> if (function)
> flen = strlen(function);
> - spin_lock(&err_buf_lock);
> va_start(args, fmt);
> - vsnprintf(err_buf, sizeof(err_buf), fmt, args);
> + vaf.fmt = fmt;
> + vaf.va = &args;
> va_end(args);
> if (sb)
> - printk(KERN_ERR "NTFS-fs warning (device %s): %s(): %s\n",
> - sb->s_id, flen ? function : "", err_buf);
> + pr_warn("(device %s): %s(): %pV\n",
> + sb->s_id, flen ? function : "", &vaf);
> else
> - printk(KERN_ERR "NTFS-fs warning: %s(): %s\n",
> - flen ? function : "", err_buf);
> - spin_unlock(&err_buf_lock);
> + pr_warn("%s(): %pV\n", flen ? function : "", &vaf);
> }
>
> /**
> @@ -94,6 +86,7 @@ void __ntfs_warning(const char *function, const struct super_block *sb,
> void __ntfs_error(const char *function, const struct super_block *sb,
> const char *fmt, ...)
> {
> + struct va_format vaf;
> va_list args;
> int flen = 0;
>
> @@ -103,17 +96,15 @@ void __ntfs_error(const char *function, const struct super_block *sb,
> #endif
> if (function)
> flen = strlen(function);
> - spin_lock(&err_buf_lock);
> va_start(args, fmt);
> - vsnprintf(err_buf, sizeof(err_buf), fmt, args);
> + vaf.fmt = fmt;
> + vaf.va = &args;
> va_end(args);
> if (sb)
> - printk(KERN_ERR "NTFS-fs error (device %s): %s(): %s\n",
> - sb->s_id, flen ? function : "", err_buf);
> + pr_err("(device %s): %s(): %pV\n",
> + sb->s_id, flen ? function : "", &vaf);
> else
> - printk(KERN_ERR "NTFS-fs error: %s(): %s\n",
> - flen ? function : "", err_buf);
> - spin_unlock(&err_buf_lock);
> + pr_err("%s(): %pV\n", flen ? function : "", &vaf);
> }
>
> #ifdef DEBUG
> @@ -124,6 +115,7 @@ int debug_msgs = 0;
> void __ntfs_debug (const char *file, int line, const char *function,
> const char *fmt, ...)
> {
> + struct va_format vaf;
> va_list args;
> int flen = 0;
>
> @@ -131,13 +123,11 @@ void __ntfs_debug (const char *file, int line, const char *function,
> return;
> if (function)
> flen = strlen(function);
> - spin_lock(&err_buf_lock);
> va_start(args, fmt);
> - vsnprintf(err_buf, sizeof(err_buf), fmt, args);
> + vaf.fmt = fmt;
> + vaf.va = &args;
> va_end(args);
> - printk(KERN_DEBUG "NTFS-fs DEBUG (%s, %d): %s(): %s\n", file, line,
> - flen ? function : "", err_buf);
> - spin_unlock(&err_buf_lock);
> + pr_debug("(%s, %d): %s(): %pV", file, line, flen ? function : "", &vaf);
> }
>
> /* Dump a runlist. Caller has to provide synchronisation for @rl. */
> @@ -149,12 +139,12 @@ void ntfs_debug_dump_runlist(const runlist_element *rl)
>
> if (!debug_msgs)
> return;
> - printk(KERN_DEBUG "NTFS-fs DEBUG: Dumping runlist (values in hex):\n");
> + pr_debug("Dumping runlist (values in hex):\n");
> if (!rl) {
> - printk(KERN_DEBUG "Run list not present.\n");
> + pr_debug("Run list not present.\n");
> return;
> }
> - printk(KERN_DEBUG "VCN LCN Run length\n");
> + pr_debug("VCN LCN Run length\n");
> for (i = 0; ; i++) {
> LCN lcn = (rl + i)->lcn;
>
> @@ -163,13 +153,13 @@ void ntfs_debug_dump_runlist(const runlist_element *rl)
>
> if (index > -LCN_ENOENT - 1)
> index = 3;
> - printk(KERN_DEBUG "%-16Lx %s %-16Lx%s\n",
> + pr_debug("%-16Lx %s %-16Lx%s\n",
> (long long)(rl + i)->vcn, lcn_str[index],
> (long long)(rl + i)->length,
> (rl + i)->length ? "" :
> " (runlist end)");
> } else
> - printk(KERN_DEBUG "%-16Lx %-16Lx %-16Lx%s\n",
> + pr_debug("%-16Lx %-16Lx %-16Lx%s\n",
> (long long)(rl + i)->vcn,
> (long long)(rl + i)->lcn,
> (long long)(rl + i)->length,
> diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
> index 82650d5..7a3c732 100644
> --- a/fs/ntfs/super.c
> +++ b/fs/ntfs/super.c
> @@ -19,6 +19,7 @@
> * distribution in the file COPYING); if not, write to the Free Software
> * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> */
> +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
>
> #include <linux/stddef.h>
> #include <linux/init.h>
> @@ -1894,7 +1895,7 @@ get_ctx_vol_failed:
> vol->minor_ver = vi->minor_ver;
> ntfs_attr_put_search_ctx(ctx);
> unmap_mft_record(NTFS_I(vol->vol_ino));
> - printk(KERN_INFO "NTFS volume version %i.%i.\n", vol->major_ver,
> + pr_info("volume version %i.%i.\n", vol->major_ver,
> vol->minor_ver);
> if (vol->major_ver < 3 && NVolSparseEnabled(vol)) {
> ntfs_warning(vol->sb, "Disabling sparse support due to NTFS "
> @@ -3093,7 +3094,7 @@ static int __init init_ntfs_fs(void)
> int err = 0;
>
> /* This may be ugly but it results in pretty output so who cares. (-8 */
> - printk(KERN_INFO "NTFS driver " NTFS_VERSION " [Flags: R/"
> + pr_info(NTFS_VERSION " [Flags: R/"
> #ifdef NTFS_RW
> "W"
> #else
> @@ -3113,16 +3114,15 @@ static int __init init_ntfs_fs(void)
> sizeof(ntfs_index_context), 0 /* offset */,
> SLAB_HWCACHE_ALIGN, NULL /* ctor */);
> if (!ntfs_index_ctx_cache) {
> - printk(KERN_CRIT "NTFS: Failed to create %s!\n",
> - ntfs_index_ctx_cache_name);
> + pr_crit("Failed to create %s!\n", ntfs_index_ctx_cache_name);
> goto ictx_err_out;
> }
> ntfs_attr_ctx_cache = kmem_cache_create(ntfs_attr_ctx_cache_name,
> sizeof(ntfs_attr_search_ctx), 0 /* offset */,
> SLAB_HWCACHE_ALIGN, NULL /* ctor */);
> if (!ntfs_attr_ctx_cache) {
> - printk(KERN_CRIT "NTFS: Failed to create %s!\n",
> - ntfs_attr_ctx_cache_name);
> + pr_crit("NTFS: Failed to create %s!\n",
> + ntfs_attr_ctx_cache_name);
> goto actx_err_out;
> }
>
> @@ -3130,8 +3130,7 @@ static int __init init_ntfs_fs(void)
> (NTFS_MAX_NAME_LEN+1) * sizeof(ntfschar), 0,
> SLAB_HWCACHE_ALIGN, NULL);
> if (!ntfs_name_cache) {
> - printk(KERN_CRIT "NTFS: Failed to create %s!\n",
> - ntfs_name_cache_name);
> + pr_crit("Failed to create %s!\n", ntfs_name_cache_name);
> goto name_err_out;
> }
>
> @@ -3139,8 +3138,7 @@ static int __init init_ntfs_fs(void)
> sizeof(ntfs_inode), 0,
> SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, NULL);
> if (!ntfs_inode_cache) {
> - printk(KERN_CRIT "NTFS: Failed to create %s!\n",
> - ntfs_inode_cache_name);
> + pr_crit("Failed to create %s!\n", ntfs_inode_cache_name);
> goto inode_err_out;
> }
>
> @@ -3149,15 +3147,14 @@ static int __init init_ntfs_fs(void)
> SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD,
> ntfs_big_inode_init_once);
> if (!ntfs_big_inode_cache) {
> - printk(KERN_CRIT "NTFS: Failed to create %s!\n",
> - ntfs_big_inode_cache_name);
> + pr_crit("Failed to create %s!\n", ntfs_big_inode_cache_name);
> goto big_inode_err_out;
> }
>
> /* Register the ntfs sysctls. */
> err = ntfs_sysctl(1);
> if (err) {
> - printk(KERN_CRIT "NTFS: Failed to register NTFS sysctls!\n");
> + pr_crit("Failed to register NTFS sysctls!\n");
> goto sysctl_err_out;
> }
>
> @@ -3166,7 +3163,7 @@ static int __init init_ntfs_fs(void)
> ntfs_debug("NTFS driver registered successfully.");
> return 0; /* Success! */
> }
> - printk(KERN_CRIT "NTFS: Failed to register NTFS filesystem driver!\n");
> + pr_crit("Failed to register NTFS filesystem driver!\n");
>
> /* Unregister the ntfs sysctls. */
> ntfs_sysctl(0);
> @@ -3182,8 +3179,7 @@ actx_err_out:
> kmem_cache_destroy(ntfs_index_ctx_cache);
> ictx_err_out:
> if (!err) {
> - printk(KERN_CRIT "NTFS: Aborting NTFS filesystem driver "
> - "registration...\n");
> + pr_crit("Aborting NTFS filesystem driver registration...\n");
> err = -ENOMEM;
> }
> return err;
--
Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @)
Unix Support, Computing Service, University of Cambridge
J.J. Thomson Avenue, Cambridge, CB3 0RB, UK
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