diff options
Diffstat (limited to 'fs/gfs2/glock.c')
| -rw-r--r-- | fs/gfs2/glock.c | 79 |
1 files changed, 28 insertions, 51 deletions
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c index f455a03a09e..454d4b4eb36 100644 --- a/fs/gfs2/glock.c +++ b/fs/gfs2/glock.c @@ -19,7 +19,6 @@ #include <linux/list.h> #include <linux/wait.h> #include <linux/module.h> -#include <linux/rwsem.h> #include <asm/uaccess.h> #include <linux/seq_file.h> #include <linux/debugfs.h> @@ -60,7 +59,6 @@ static int __dump_glock(struct seq_file *seq, const struct gfs2_glock *gl); #define GLOCK_BUG_ON(gl,x) do { if (unlikely(x)) { __dump_glock(NULL, gl); BUG(); } } while(0) static void do_xmote(struct gfs2_glock *gl, struct gfs2_holder *gh, unsigned int target); -static DECLARE_RWSEM(gfs2_umount_flush_sem); static struct dentry *gfs2_root; static struct workqueue_struct *glock_workqueue; struct workqueue_struct *gfs2_delete_workqueue; @@ -154,12 +152,14 @@ static unsigned int gl_hash(const struct gfs2_sbd *sdp, static void glock_free(struct gfs2_glock *gl) { struct gfs2_sbd *sdp = gl->gl_sbd; - struct inode *aspace = gl->gl_aspace; + struct address_space *mapping = gfs2_glock2aspace(gl); + struct kmem_cache *cachep = gfs2_glock_cachep; - if (aspace) - gfs2_aspace_put(aspace); + GLOCK_BUG_ON(gl, mapping && mapping->nrpages); trace_gfs2_glock_put(gl); - sdp->sd_lockstruct.ls_ops->lm_put_lock(gfs2_glock_cachep, gl); + if (mapping) + cachep = gfs2_glock_aspace_cachep; + sdp->sd_lockstruct.ls_ops->lm_put_lock(cachep, gl); } /** @@ -712,7 +712,6 @@ static void glock_work_func(struct work_struct *work) finish_xmote(gl, gl->gl_reply); drop_ref = 1; } - down_read(&gfs2_umount_flush_sem); spin_lock(&gl->gl_spin); if (test_and_clear_bit(GLF_PENDING_DEMOTE, &gl->gl_flags) && gl->gl_state != LM_ST_UNLOCKED && @@ -725,7 +724,6 @@ static void glock_work_func(struct work_struct *work) } run_queue(gl, 0); spin_unlock(&gl->gl_spin); - up_read(&gfs2_umount_flush_sem); if (!delay || queue_delayed_work(glock_workqueue, &gl->gl_work, delay) == 0) gfs2_glock_put(gl); @@ -750,10 +748,11 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number, const struct gfs2_glock_operations *glops, int create, struct gfs2_glock **glp) { + struct super_block *s = sdp->sd_vfs; struct lm_lockname name = { .ln_number = number, .ln_type = glops->go_type }; struct gfs2_glock *gl, *tmp; unsigned int hash = gl_hash(sdp, &name); - int error; + struct address_space *mapping; read_lock(gl_lock_addr(hash)); gl = search_bucket(hash, sdp, &name); @@ -765,10 +764,14 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number, if (!create) return -ENOENT; - gl = kmem_cache_alloc(gfs2_glock_cachep, GFP_KERNEL); + if (glops->go_flags & GLOF_ASPACE) + gl = kmem_cache_alloc(gfs2_glock_aspace_cachep, GFP_KERNEL); + else + gl = kmem_cache_alloc(gfs2_glock_cachep, GFP_KERNEL); if (!gl) return -ENOMEM; + atomic_inc(&sdp->sd_glock_disposal); gl->gl_flags = 0; gl->gl_name = name; atomic_set(&gl->gl_ref, 1); @@ -783,18 +786,18 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number, gl->gl_tchange = jiffies; gl->gl_object = NULL; gl->gl_sbd = sdp; - gl->gl_aspace = NULL; INIT_DELAYED_WORK(&gl->gl_work, glock_work_func); INIT_WORK(&gl->gl_delete, delete_work_func); - /* If this glock protects actual on-disk data or metadata blocks, - create a VFS inode to manage the pages/buffers holding them. */ - if (glops == &gfs2_inode_glops || glops == &gfs2_rgrp_glops) { - gl->gl_aspace = gfs2_aspace_get(sdp); - if (!gl->gl_aspace) { - error = -ENOMEM; - goto fail; - } + mapping = gfs2_glock2aspace(gl); + if (mapping) { + mapping->a_ops = &gfs2_meta_aops; + mapping->host = s->s_bdev->bd_inode; + mapping->flags = 0; + mapping_set_gfp_mask(mapping, GFP_NOFS); + mapping->assoc_mapping = NULL; + mapping->backing_dev_info = s->s_bdi; + mapping->writeback_index = 0; } write_lock(gl_lock_addr(hash)); @@ -811,10 +814,6 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number, *glp = gl; return 0; - -fail: - kmem_cache_free(gfs2_glock_cachep, gl); - return error; } /** @@ -1509,35 +1508,13 @@ void gfs2_glock_thaw(struct gfs2_sbd *sdp) void gfs2_gl_hash_clear(struct gfs2_sbd *sdp) { - unsigned long t; unsigned int x; - int cont; - t = jiffies; - - for (;;) { - cont = 0; - for (x = 0; x < GFS2_GL_HASH_SIZE; x++) { - if (examine_bucket(clear_glock, sdp, x)) - cont = 1; - } - - if (!cont) - break; - - if (time_after_eq(jiffies, - t + gfs2_tune_get(sdp, gt_stall_secs) * HZ)) { - fs_warn(sdp, "Unmount seems to be stalled. " - "Dumping lock state...\n"); - gfs2_dump_lockstate(sdp); - t = jiffies; - } - - down_write(&gfs2_umount_flush_sem); - invalidate_inodes(sdp->sd_vfs); - up_write(&gfs2_umount_flush_sem); - msleep(10); - } + for (x = 0; x < GFS2_GL_HASH_SIZE; x++) + examine_bucket(clear_glock, sdp, x); + flush_workqueue(glock_workqueue); + wait_event(sdp->sd_glock_wait, atomic_read(&sdp->sd_glock_disposal) == 0); + gfs2_dump_lockstate(sdp); } void gfs2_glock_finish_truncate(struct gfs2_inode *ip) @@ -1681,7 +1658,7 @@ static int __dump_glock(struct seq_file *seq, const struct gfs2_glock *gl) dtime *= 1000000/HZ; /* demote time in uSec */ if (!test_bit(GLF_DEMOTE, &gl->gl_flags)) dtime = 0; - gfs2_print_dbg(seq, "G: s:%s n:%u/%llu f:%s t:%s d:%s/%llu a:%d r:%d\n", + gfs2_print_dbg(seq, "G: s:%s n:%u/%llx f:%s t:%s d:%s/%llu a:%d r:%d\n", state2str(gl->gl_state), gl->gl_name.ln_type, (unsigned long long)gl->gl_name.ln_number, |