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author | Toshi Kani <toshi.kani@hpe.com> | 2016-05-10 19:23:52 +0300 |
---|---|---|
committer | Vishal Verma <vishal.l.verma@intel.com> | 2016-05-17 09:44:10 +0300 |
commit | 2af3a8159cd204fc8437ed2f75863f0fb930f0d0 (patch) | |
tree | 947322f9b8e31e15c0eada21fec37809e3f47a08 /fs/block_dev.c | |
parent | 7795bec89ebf927ea3ad9ed5f396c227e5c73271 (diff) | |
download | linux-2af3a8159cd204fc8437ed2f75863f0fb930f0d0.tar.xz |
block: Add vfs_msg() interface
In preparation of moving DAX capability checks to the block layer
from filesystem code, add a VFS message interface that aligns with
filesystem's message format.
For instance, a vfs_msg() message followed by XFS messages in case
of a dax mount error may look like:
VFS (pmem0p1): error: unaligned partition for dax
XFS (pmem0p1): DAX unsupported by block device. Turning off DAX.
XFS (pmem0p1): Mounting V5 Filesystem
:
vfs_msg() is largely based on ext4_msg().
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Jens Axboe <axboe@fb.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: Jan Kara <jack@suse.cz>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Boaz Harrosh <boaz@plexistor.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Diffstat (limited to 'fs/block_dev.c')
-rw-r--r-- | fs/block_dev.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c index b25bb230b28a..91e0ec0233c0 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -50,6 +50,18 @@ struct block_device *I_BDEV(struct inode *inode) } EXPORT_SYMBOL(I_BDEV); +void __vfs_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) +{ + struct va_format vaf; + va_list args; + + va_start(args, fmt); + vaf.fmt = fmt; + vaf.va = &args; + printk_ratelimited("%sVFS (%s): %pV\n", prefix, sb->s_id, &vaf); + va_end(args); +} + static void bdev_write_inode(struct block_device *bdev) { struct inode *inode = bdev->bd_inode; |