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| author | Mark Fasheh <mfasheh@suse.com> | 2010-04-05 18:17:13 -0700 |
|---|---|---|
| committer | Joel Becker <joel.becker@oracle.com> | 2010-05-05 18:18:06 -0700 |
| commit | 73c8a80003d13be54e2309865030404441075182 (patch) | |
| tree | 9b5a47939c22838133f46ea6d207254aa68d177b /fs/ocfs2/localalloc.c | |
| parent | a57c8fd2ad238258cc983049008aea5f985804b2 (diff) | |
| download | linux-73c8a80003d13be54e2309865030404441075182.tar.bz2 | |
ocfs2: clean up localalloc mount option size parsing
This patch pulls the local alloc sizing code into localalloc.c and provides
a callout to it from ocfs2_fill_super(). Behavior is essentially unchanged
except that I correctly calculate the maximum local alloc size. The old code
in ocfs2_parse_options() calculated the max size as:
ocfs2_local_alloc_size(sb) * 8
which is correct, in bits. Unfortunately though the option passed in is in
megabytes. Ultimately, this bug made no real difference - the shrink code
would catch a too-large size and bring it down to something reasonable.
Still, it's less than efficient as-is.
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Diffstat (limited to 'fs/ocfs2/localalloc.c')
| -rw-r--r-- | fs/ocfs2/localalloc.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c index 880e4bc827be..e39a3e7146c9 100644 --- a/fs/ocfs2/localalloc.c +++ b/fs/ocfs2/localalloc.c @@ -75,6 +75,34 @@ static int ocfs2_local_alloc_new_window(struct ocfs2_super *osb, static int ocfs2_local_alloc_slide_window(struct ocfs2_super *osb, struct inode *local_alloc_inode); +void ocfs2_la_set_sizes(struct ocfs2_super *osb, int requested_mb) +{ + struct super_block *sb = osb->sb; + unsigned int la_default_mb = OCFS2_DEFAULT_LOCAL_ALLOC_SIZE; + unsigned int la_max_mb; + + la_max_mb = ocfs2_clusters_to_megabytes(sb, + ocfs2_local_alloc_size(sb) * 8); + + mlog(0, "requested: %dM, max: %uM, default: %uM\n", + requested_mb, la_max_mb, la_default_mb); + + if (requested_mb == -1) { + /* No user request - use defaults */ + osb->local_alloc_default_bits = + ocfs2_megabytes_to_clusters(sb, la_default_mb); + } else if (requested_mb > la_max_mb) { + /* Request is too big, we give the maximum available */ + osb->local_alloc_default_bits = + ocfs2_megabytes_to_clusters(sb, la_max_mb); + } else { + osb->local_alloc_default_bits = + ocfs2_megabytes_to_clusters(sb, requested_mb); + } + + osb->local_alloc_bits = osb->local_alloc_default_bits; +} + static inline int ocfs2_la_state_enabled(struct ocfs2_super *osb) { return (osb->local_alloc_state == OCFS2_LA_THROTTLED || |