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| author | Wenwei Tao <ww.tao0320@gmail.com> | 2016-03-03 15:06:38 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-03-18 18:10:38 -0700 |
| commit | da1e284919b0b99c5bf0618b6c98cbaf2c17e62e (patch) | |
| tree | ef1d8fe8821376dd57fbd4d3319a747841df38e6 /drivers/lightnvm/gennvm.c | |
| parent | 4c9dacb82d5aa36aa2568df60d897f2eb3d8819b (diff) | |
| download | linux-da1e284919b0b99c5bf0618b6c98cbaf2c17e62e.tar.bz2 | |
lightnvm: add a bitmap of luns
Add a bitmap of luns to indicate the status
of luns: inuse/available. When create targets
do the necessary check to avoid allocating luns
that are already allocated.
Signed-off-by: Wenwei Tao <ww.tao0320@gmail.com>
Freed dev->lun_map if nvm_core_init later failed in the init process.
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/lightnvm/gennvm.c')
| -rw-r--r-- | drivers/lightnvm/gennvm.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c index d460b37bb016..b97801c00099 100644 --- a/drivers/lightnvm/gennvm.c +++ b/drivers/lightnvm/gennvm.c @@ -192,6 +192,9 @@ static int gennvm_block_map(u64 slba, u32 nlb, __le64 *entries, void *private) lun_id = div_u64(pba, dev->sec_per_lun); lun = &gn->luns[lun_id]; + if (!test_bit(lun_id, dev->lun_map)) + __set_bit(lun_id, dev->lun_map); + /* Calculate block offset into lun */ pba = pba - (dev->sec_per_lun * lun_id); blk = &lun->vlun.blocks[div_u64(pba, dev->sec_per_blk)]; @@ -482,10 +485,23 @@ static int gennvm_erase_blk(struct nvm_dev *dev, struct nvm_block *blk, return nvm_erase_ppa(dev, &addr, 1); } +static int gennvm_reserve_lun(struct nvm_dev *dev, int lunid) +{ + return test_and_set_bit(lunid, dev->lun_map); +} + +static void gennvm_release_lun(struct nvm_dev *dev, int lunid) +{ + WARN_ON(!test_and_clear_bit(lunid, dev->lun_map)); +} + static struct nvm_lun *gennvm_get_lun(struct nvm_dev *dev, int lunid) { struct gen_nvm *gn = dev->mp; + if (unlikely(lunid >= dev->nr_luns)) + return NULL; + return &gn->luns[lunid].vlun; } @@ -527,6 +543,8 @@ static struct nvmm_type gennvm = { .erase_blk = gennvm_erase_blk, .get_lun = gennvm_get_lun, + .reserve_lun = gennvm_reserve_lun, + .release_lun = gennvm_release_lun, .lun_info_print = gennvm_lun_info_print, .get_area = gennvm_get_area, |