From cda95406c8fe491c01b3abc422c25a613e9f36ea Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 27 Feb 2013 17:03:44 -0800 Subject: dlm: use idr_for_each_entry() in recover_idr_clear() error path Convert recover_idr_clear() to use idr_for_each_entry() instead of idr_for_each(). It's somewhat less efficient this way but it shouldn't matter in an error path. This is to help with deprecation of idr_remove_all(). Signed-off-by: Tejun Heo Cc: Christine Caulfield Cc: David Teigland Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/dlm/recover.c | 23 ++++++++++------------- 1 file changed, 10 insertions(+), 13 deletions(-) (limited to 'fs/dlm/recover.c') diff --git a/fs/dlm/recover.c b/fs/dlm/recover.c index aedea28a86a1..b2856e701641 100644 --- a/fs/dlm/recover.c +++ b/fs/dlm/recover.c @@ -351,23 +351,20 @@ static struct dlm_rsb *recover_idr_find(struct dlm_ls *ls, uint64_t id) return r; } -static int recover_idr_clear_rsb(int id, void *p, void *data) +static void recover_idr_clear(struct dlm_ls *ls) { - struct dlm_ls *ls = data; - struct dlm_rsb *r = p; + struct dlm_rsb *r; + int id; - r->res_id = 0; - r->res_recover_locks_count = 0; - ls->ls_recover_list_count--; + spin_lock(&ls->ls_recover_idr_lock); - dlm_put_rsb(r); - return 0; -} + idr_for_each_entry(&ls->ls_recover_idr, r, id) { + r->res_id = 0; + r->res_recover_locks_count = 0; + ls->ls_recover_list_count--; -static void recover_idr_clear(struct dlm_ls *ls) -{ - spin_lock(&ls->ls_recover_idr_lock); - idr_for_each(&ls->ls_recover_idr, recover_idr_clear_rsb, ls); + dlm_put_rsb(r); + } idr_remove_all(&ls->ls_recover_idr); if (ls->ls_recover_list_count != 0) { -- cgit v1.2.3 From a67a380e6f8534b9fed3b3b663d108bf35af0132 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 27 Feb 2013 17:03:45 -0800 Subject: dlm: don't use idr_remove_all() idr_destroy() can destroy idr by itself and idr_remove_all() is being deprecated. The conversion isn't completely trivial for recover_idr_clear() as it's the only place in kernel which makes legitimate use of idr_remove_all() w/o idr_destroy(). Replace it with idr_remove() call inside idr_for_each_entry() loop. It goes on top so that it matches the operation order in recover_idr_del(). Signed-off-by: Tejun Heo Cc: Christine Caulfield Cc: David Teigland Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/dlm/lockspace.c | 1 - fs/dlm/recover.c | 2 +- 2 files changed, 1 insertion(+), 2 deletions(-) (limited to 'fs/dlm/recover.c') diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c index 2e99fb0c9737..3ca79d3253b9 100644 --- a/fs/dlm/lockspace.c +++ b/fs/dlm/lockspace.c @@ -796,7 +796,6 @@ static int release_lockspace(struct dlm_ls *ls, int force) */ idr_for_each(&ls->ls_lkbidr, lkb_idr_free, ls); - idr_remove_all(&ls->ls_lkbidr); idr_destroy(&ls->ls_lkbidr); /* diff --git a/fs/dlm/recover.c b/fs/dlm/recover.c index b2856e701641..236d1085d6a2 100644 --- a/fs/dlm/recover.c +++ b/fs/dlm/recover.c @@ -359,13 +359,13 @@ static void recover_idr_clear(struct dlm_ls *ls) spin_lock(&ls->ls_recover_idr_lock); idr_for_each_entry(&ls->ls_recover_idr, r, id) { + idr_remove(&ls->ls_recover_idr, id); r->res_id = 0; r->res_recover_locks_count = 0; ls->ls_recover_list_count--; dlm_put_rsb(r); } - idr_remove_all(&ls->ls_recover_idr); if (ls->ls_recover_list_count != 0) { log_error(ls, "warning: recover_list_count %d", -- cgit v1.2.3 From 2a86b3e74f12bcdd13ceb1bf333bc2d5f43b3c02 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 27 Feb 2013 17:04:49 -0800 Subject: dlm: convert to idr_alloc() Convert to the much saner new idr interface. Error return values from recover_idr_add() mix -1 and -errno. The conversion doesn't change that but it looks iffy. Signed-off-by: Tejun Heo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/dlm/lock.c | 18 ++++++------------ fs/dlm/recover.c | 27 +++++++++++++-------------- 2 files changed, 19 insertions(+), 26 deletions(-) (limited to 'fs/dlm/recover.c') diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c index f7501651762d..1b1146670c4b 100644 --- a/fs/dlm/lock.c +++ b/fs/dlm/lock.c @@ -1183,7 +1183,7 @@ static void detach_lkb(struct dlm_lkb *lkb) static int create_lkb(struct dlm_ls *ls, struct dlm_lkb **lkb_ret) { struct dlm_lkb *lkb; - int rv, id; + int rv; lkb = dlm_allocate_lkb(ls); if (!lkb) @@ -1199,19 +1199,13 @@ static int create_lkb(struct dlm_ls *ls, struct dlm_lkb **lkb_ret) mutex_init(&lkb->lkb_cb_mutex); INIT_WORK(&lkb->lkb_cb_work, dlm_callback_work); - retry: - rv = idr_pre_get(&ls->ls_lkbidr, GFP_NOFS); - if (!rv) - return -ENOMEM; - + idr_preload(GFP_NOFS); spin_lock(&ls->ls_lkbidr_spin); - rv = idr_get_new_above(&ls->ls_lkbidr, lkb, 1, &id); - if (!rv) - lkb->lkb_id = id; + rv = idr_alloc(&ls->ls_lkbidr, lkb, 1, 0, GFP_NOWAIT); + if (rv >= 0) + lkb->lkb_id = rv; spin_unlock(&ls->ls_lkbidr_spin); - - if (rv == -EAGAIN) - goto retry; + idr_preload_end(); if (rv < 0) { log_error(ls, "create_lkb idr error %d", rv); diff --git a/fs/dlm/recover.c b/fs/dlm/recover.c index 236d1085d6a2..a6bc63f6e31b 100644 --- a/fs/dlm/recover.c +++ b/fs/dlm/recover.c @@ -305,27 +305,26 @@ static int recover_idr_empty(struct dlm_ls *ls) static int recover_idr_add(struct dlm_rsb *r) { struct dlm_ls *ls = r->res_ls; - int rv, id; - - rv = idr_pre_get(&ls->ls_recover_idr, GFP_NOFS); - if (!rv) - return -ENOMEM; + int rv; + idr_preload(GFP_NOFS); spin_lock(&ls->ls_recover_idr_lock); if (r->res_id) { - spin_unlock(&ls->ls_recover_idr_lock); - return -1; - } - rv = idr_get_new_above(&ls->ls_recover_idr, r, 1, &id); - if (rv) { - spin_unlock(&ls->ls_recover_idr_lock); - return rv; + rv = -1; + goto out_unlock; } - r->res_id = id; + rv = idr_alloc(&ls->ls_recover_idr, r, 1, 0, GFP_NOWAIT); + if (rv < 0) + goto out_unlock; + + r->res_id = rv; ls->ls_recover_list_count++; dlm_hold_rsb(r); + rv = 0; +out_unlock: spin_unlock(&ls->ls_recover_idr_lock); - return 0; + idr_preload_end(); + return rv; } static void recover_idr_del(struct dlm_rsb *r) -- cgit v1.2.3