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jbd2: clean up how the journal device name is printed

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Calculate the journal device name once and stash it away in the
journal_s structure.  This avoids needing to call bdevname()
everywhere and reduces stack usage by not needing to allocate an
on-stack buffer.  In addition, we eliminate the '/' that can appear in
device names (e.g. "cciss/c0d0p9" --- see kernel bugzilla #11321) that
can cause problems when creating proc directory names, and include the
inode number to support ocfs2 which creates multiple journals with
different inode numbers.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o
2008-09-16 14:36:17 -04:00
parent 899fc1a4cf
commit 05496769e5
4 changed files with 24 additions and 50 deletions
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3
include/linux/jbd2.h
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@@ -850,7 +850,8 @@ struct journal_s
*/
struct block_device *j_dev;
int j_blocksize;
unsigned long long j_blk_offset;
unsigned long long j_blk_offset;
char j_devname[BDEVNAME_SIZE+24];
/*
* Device which holds the client fs. For internal journal this will be