Btrfs: introduce common define for max number of mirrors
Readahead already has a define for the max number of mirrors. Scrub needs such a define now, the rest of the code will need something like this soon. Therefore the define was added to ctree.h and removed from the readahead code. Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de> Signed-off-by: Chris Mason <chris.mason@oracle.com>
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@ -48,6 +48,8 @@ struct btrfs_ordered_sum;
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#define BTRFS_MAGIC "_BHRfS_M"
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#define BTRFS_MAX_MIRRORS 2
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#define BTRFS_MAX_LEVEL 8
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#define BTRFS_COMPAT_EXTENT_TREE_V0
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@ -54,7 +54,6 @@
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* than the 2 started one after another.
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*/
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#define MAX_MIRRORS 2
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#define MAX_IN_FLIGHT 6
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struct reada_extctl {
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@ -71,7 +70,7 @@ struct reada_extent {
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struct list_head extctl;
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struct kref refcnt;
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spinlock_t lock;
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struct reada_zone *zones[MAX_MIRRORS];
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struct reada_zone *zones[BTRFS_MAX_MIRRORS];
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int nzones;
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struct btrfs_device *scheduled_for;
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};
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@ -84,7 +83,8 @@ struct reada_zone {
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spinlock_t lock;
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int locked;
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struct btrfs_device *device;
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struct btrfs_device *devs[MAX_MIRRORS]; /* full list, incl self */
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struct btrfs_device *devs[BTRFS_MAX_MIRRORS]; /* full list, incl
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* self */
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int ndevs;
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struct kref refcnt;
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};
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@ -365,9 +365,9 @@ again:
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if (ret || !bbio || length < blocksize)
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goto error;
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if (bbio->num_stripes > MAX_MIRRORS) {
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if (bbio->num_stripes > BTRFS_MAX_MIRRORS) {
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printk(KERN_ERR "btrfs readahead: more than %d copies not "
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"supported", MAX_MIRRORS);
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"supported", BTRFS_MAX_MIRRORS);
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goto error;
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}
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