diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c
index 7118f1a780a9592ac67114f25ca7e9e040f937d4..cbc07155b1a0a0e4a3d10fb47f00c7ed1cdfef8f 100644
--- a/fs/gfs2/acl.c
+++ b/fs/gfs2/acl.c
@@ -80,8 +80,11 @@ int gfs2_check_acl(struct inode *inode, int mask, unsigned int flags)
struct posix_acl *acl;
int error;
- if (flags & IPERM_FLAG_RCU)
- return -ECHILD;
+ if (flags & IPERM_FLAG_RCU) {
+ if (!negative_cached_acl(inode, ACL_TYPE_ACCESS))
+ return -ECHILD;
+ return -EAGAIN;
+ }
acl = gfs2_acl_get(GFS2_I(inode), ACL_TYPE_ACCESS);
if (IS_ERR(acl))
diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
index 4f36f8832b9b1b167321e119260da82d89b4cdf0..aad77e4f61b574a3b29bb253a01e29046c70da55 100644
--- a/fs/gfs2/aops.c
+++ b/fs/gfs2/aops.c
@@ -695,6 +695,7 @@ out:
if (error == 0)
return 0;
+ unlock_page(page);
page_cache_release(page);
gfs2_trans_end(sdp);
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index 3c4039d5eef12d1b35ffd93c3f1861e43cc9b520..ef3dc4b9fae2d64edbc9a9ed99a9613282e7d0f8 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -21,6 +21,7 @@
#include "meta_io.h"
#include "quota.h"
#include "rgrp.h"
+#include "super.h"
#include "trans.h"
#include "dir.h"
#include "util.h"
@@ -757,7 +758,7 @@ static int do_strip(struct gfs2_inode *ip, struct buffer_head *dibh,
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct gfs2_rgrp_list rlist;
u64 bn, bstart;
- u32 blen;
+ u32 blen, btotal;
__be64 *p;
unsigned int rg_blocks = 0;
int metadata;
@@ -839,6 +840,7 @@ static int do_strip(struct gfs2_inode *ip, struct buffer_head *dibh,
bstart = 0;
blen = 0;
+ btotal = 0;
for (p = top; p < bottom; p++) {
if (!*p)
@@ -851,9 +853,11 @@ static int do_strip(struct gfs2_inode *ip, struct buffer_head *dibh,
else {
if (bstart) {
if (metadata)
- gfs2_free_meta(ip, bstart, blen);
+ __gfs2_free_meta(ip, bstart, blen);
else
- gfs2_free_data(ip, bstart, blen);
+ __gfs2_free_data(ip, bstart, blen);
+
+ btotal += blen;
}
bstart = bn;
@@ -865,11 +869,17 @@ static int do_strip(struct gfs2_inode *ip, struct buffer_head *dibh,
}
if (bstart) {
if (metadata)
- gfs2_free_meta(ip, bstart, blen);
+ __gfs2_free_meta(ip, bstart, blen);
else
- gfs2_free_data(ip, bstart, blen);
+ __gfs2_free_data(ip, bstart, blen);
+
+ btotal += blen;
}
+ gfs2_statfs_change(sdp, 0, +btotal, 0);
+ gfs2_quota_change(ip, -(s64)btotal, ip->i_inode.i_uid,
+ ip->i_inode.i_gid);
+
ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;
gfs2_dinode_out(ip, dibh->b_data);
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 7cfdcb9133635978af945d40b2b450d52dbe5de9..4074b952b059fde1e44efe84d27e5ba17a87a25c 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -448,15 +448,20 @@ static int gfs2_mmap(struct file *file, struct vm_area_struct *vma)
{
struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
- if (!(file->f_flags & O_NOATIME)) {
+ if (!(file->f_flags & O_NOATIME) &&
+ !IS_NOATIME(&ip->i_inode)) {
struct gfs2_holder i_gh;
int error;
- gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
+ gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
error = gfs2_glock_nq(&i_gh);
- file_accessed(file);
- if (error == 0)
- gfs2_glock_dq_uninit(&i_gh);
+ if (error == 0) {
+ file_accessed(file);
+ gfs2_glock_dq(&i_gh);
+ }
+ gfs2_holder_uninit(&i_gh);
+ if (error)
+ return error;
}
vma->vm_ops = &gfs2_vm_ops;
vma->vm_flags |= VM_CAN_NONLINEAR;
@@ -617,8 +622,7 @@ static void empty_write_end(struct page *page, unsigned from,
{
struct gfs2_inode *ip = GFS2_I(page->mapping->host);
- page_zero_new_buffers(page, from, to);
- flush_dcache_page(page);
+ zero_user(page, from, to-from);
mark_page_accessed(page);
if (!gfs2_is_writeback(ip))
@@ -627,36 +631,43 @@ static void empty_write_end(struct page *page, unsigned from,
block_commit_write(page, from, to);
}
-static int write_empty_blocks(struct page *page, unsigned from, unsigned to)
+static int needs_empty_write(sector_t block, struct inode *inode)
{
- unsigned start, end, next;
- struct buffer_head *bh, *head;
int error;
+ struct buffer_head bh_map = { .b_state = 0, .b_blocknr = 0 };
- if (!page_has_buffers(page)) {
- error = __block_write_begin(page, from, to - from, gfs2_block_map);
- if (unlikely(error))
- return error;
+ bh_map.b_size = 1 << inode->i_blkbits;
+ error = gfs2_block_map(inode, block, &bh_map, 0);
+ if (unlikely(error))
+ return error;
+ return !buffer_mapped(&bh_map);
+}
- empty_write_end(page, from, to);
- return 0;
- }
+static int write_empty_blocks(struct page *page, unsigned from, unsigned to)
+{
+ struct inode *inode = page->mapping->host;
+ unsigned start, end, next, blksize;
+ sector_t block = page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits);
+ int ret;
- bh = head = page_buffers(page);
+ blksize = 1 << inode->i_blkbits;
next = end = 0;
while (next < from) {
- next += bh->b_size;
- bh = bh->b_this_page;
+ next += blksize;
+ block++;
}
start = next;
do {
- next += bh->b_size;
- if (buffer_mapped(bh)) {
+ next += blksize;
+ ret = needs_empty_write(block, inode);
+ if (unlikely(ret < 0))
+ return ret;
+ if (ret == 0) {
if (end) {
- error = __block_write_begin(page, start, end - start,
- gfs2_block_map);
- if (unlikely(error))
- return error;
+ ret = __block_write_begin(page, start, end - start,
+ gfs2_block_map);
+ if (unlikely(ret))
+ return ret;
empty_write_end(page, start, end);
end = 0;
}
@@ -664,13 +675,13 @@ static int write_empty_blocks(struct page *page, unsigned from, unsigned to)
}
else
end = next;
- bh = bh->b_this_page;
+ block++;
} while (next < to);
if (end) {
- error = __block_write_begin(page, start, end - start, gfs2_block_map);
- if (unlikely(error))
- return error;
+ ret = __block_write_begin(page, start, end - start, gfs2_block_map);
+ if (unlikely(ret))
+ return ret;
empty_write_end(page, start, end);
}
@@ -976,8 +987,10 @@ static void do_unflock(struct file *file, struct file_lock *fl)
mutex_lock(&fp->f_fl_mutex);
flock_lock_file_wait(file, fl);
- if (fl_gh->gh_gl)
- gfs2_glock_dq_uninit(fl_gh);
+ if (fl_gh->gh_gl) {
+ gfs2_glock_dq_wait(fl_gh);
+ gfs2_holder_uninit(fl_gh);
+ }
mutex_unlock(&fp->f_fl_mutex);
}
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index 7cd9a5a68d59d441f4dcf611d604a18a11e2b61f..e2431313491f1e54e136be64dcc3b0c3ba1033bc 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -26,6 +26,9 @@
#include <linux/freezer.h>
#include <linux/workqueue.h>
#include <linux/jiffies.h>
+#include <linux/rcupdate.h>
+#include <linux/rculist_bl.h>
+#include <linux/bit_spinlock.h>
#include "gfs2.h"
#include "incore.h"
@@ -41,10 +44,6 @@
#define CREATE_TRACE_POINTS
#include "trace_gfs2.h"
-struct gfs2_gl_hash_bucket {
- struct hlist_head hb_list;
-};
-
struct gfs2_glock_iter {
int hash; /* hash bucket index */
struct gfs2_sbd *sdp; /* incore superblock */
@@ -54,7 +53,6 @@ struct gfs2_glock_iter {
typedef void (*glock_examiner) (struct gfs2_glock * gl);
-static int gfs2_dump_lockstate(struct gfs2_sbd *sdp);
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);
@@ -70,57 +68,9 @@ static DEFINE_SPINLOCK(lru_lock);
#define GFS2_GL_HASH_SIZE (1 << GFS2_GL_HASH_SHIFT)
#define GFS2_GL_HASH_MASK (GFS2_GL_HASH_SIZE - 1)
-static struct gfs2_gl_hash_bucket gl_hash_table[GFS2_GL_HASH_SIZE];
+static struct hlist_bl_head gl_hash_table[GFS2_GL_HASH_SIZE];
static struct dentry *gfs2_root;
-/*
- * Despite what you might think, the numbers below are not arbitrary :-)
- * They are taken from the ipv4 routing hash code, which is well tested
- * and thus should be nearly optimal. Later on we might tweek the numbers
- * but for now this should be fine.
- *
- * The reason for putting the locks in a separate array from the list heads
- * is that we can have fewer locks than list heads and save memory. We use
- * the same hash function for both, but with a different hash mask.
- */
-#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK) || \
- defined(CONFIG_PROVE_LOCKING)
-
-#ifdef CONFIG_LOCKDEP
-# define GL_HASH_LOCK_SZ 256
-#else
-# if NR_CPUS >= 32
-# define GL_HASH_LOCK_SZ 4096
-# elif NR_CPUS >= 16
-# define GL_HASH_LOCK_SZ 2048
-# elif NR_CPUS >= 8
-# define GL_HASH_LOCK_SZ 1024
-# elif NR_CPUS >= 4
-# define GL_HASH_LOCK_SZ 512
-# else
-# define GL_HASH_LOCK_SZ 256
-# endif
-#endif
-
-/* We never want more locks than chains */
-#if GFS2_GL_HASH_SIZE < GL_HASH_LOCK_SZ
-# undef GL_HASH_LOCK_SZ
-# define GL_HASH_LOCK_SZ GFS2_GL_HASH_SIZE
-#endif
-
-static rwlock_t gl_hash_locks[GL_HASH_LOCK_SZ];
-
-static inline rwlock_t *gl_lock_addr(unsigned int x)
-{
- return &gl_hash_locks[x & (GL_HASH_LOCK_SZ-1)];
-}
-#else /* not SMP, so no spinlocks required */
-static inline rwlock_t *gl_lock_addr(unsigned int x)
-{
- return NULL;
-}
-#endif
-
/**
* gl_hash() - Turn glock number into hash bucket number
* @lock: The glock number
@@ -141,25 +91,35 @@ static unsigned int gl_hash(const struct gfs2_sbd *sdp,
return h;
}
-/**
- * glock_free() - Perform a few checks and then release struct gfs2_glock
- * @gl: The glock to release
- *
- * Also calls lock module to release its internal structure for this glock.
- *
- */
+static inline void spin_lock_bucket(unsigned int hash)
+{
+ struct hlist_bl_head *bl = &gl_hash_table[hash];
+ bit_spin_lock(0, (unsigned long *)bl);
+}
-static void glock_free(struct gfs2_glock *gl)
+static inline void spin_unlock_bucket(unsigned int hash)
+{
+ struct hlist_bl_head *bl = &gl_hash_table[hash];
+ __bit_spin_unlock(0, (unsigned long *)bl);
+}
+
+static void gfs2_glock_dealloc(struct rcu_head *rcu)
+{
+ struct gfs2_glock *gl = container_of(rcu, struct gfs2_glock, gl_rcu);
+
+ if (gl->gl_ops->go_flags & GLOF_ASPACE)
+ kmem_cache_free(gfs2_glock_aspace_cachep, gl);
+ else
+ kmem_cache_free(gfs2_glock_cachep, gl);
+}
+
+void gfs2_glock_free(struct gfs2_glock *gl)
{
struct gfs2_sbd *sdp = gl->gl_sbd;
- struct address_space *mapping = gfs2_glock2aspace(gl);
- struct kmem_cache *cachep = gfs2_glock_cachep;
- GLOCK_BUG_ON(gl, mapping && mapping->nrpages);
- trace_gfs2_glock_put(gl);
- if (mapping)
- cachep = gfs2_glock_aspace_cachep;
- sdp->sd_lockstruct.ls_ops->lm_put_lock(cachep, gl);
+ call_rcu(&gl->gl_rcu, gfs2_glock_dealloc);
+ if (atomic_dec_and_test(&sdp->sd_glock_disposal))
+ wake_up(&sdp->sd_glock_wait);
}
/**
@@ -185,34 +145,49 @@ static int demote_ok(const struct gfs2_glock *gl)
{
const struct gfs2_glock_operations *glops = gl->gl_ops;
+ /* assert_spin_locked(&gl->gl_spin); */
+
if (gl->gl_state == LM_ST_UNLOCKED)
return 0;
- if (!list_empty(&gl->gl_holders))
+ if (test_bit(GLF_LFLUSH, &gl->gl_flags))
+ return 0;
+ if ((gl->gl_name.ln_type != LM_TYPE_INODE) &&
+ !list_empty(&gl->gl_holders))
return 0;
if (glops->go_demote_ok)
return glops->go_demote_ok(gl);
return 1;
}
+
/**
- * gfs2_glock_schedule_for_reclaim - Add a glock to the reclaim list
+ * __gfs2_glock_schedule_for_reclaim - Add a glock to the reclaim list
* @gl: the glock
*
+ * If the glock is demotable, then we add it (or move it) to the end
+ * of the glock LRU list.
*/
-static void gfs2_glock_schedule_for_reclaim(struct gfs2_glock *gl)
+static void __gfs2_glock_schedule_for_reclaim(struct gfs2_glock *gl)
{
- int may_reclaim;
- may_reclaim = (demote_ok(gl) &&
- (atomic_read(&gl->gl_ref) == 1 ||
- (gl->gl_name.ln_type == LM_TYPE_INODE &&
- atomic_read(&gl->gl_ref) <= 2)));
- spin_lock(&lru_lock);
- if (list_empty(&gl->gl_lru) && may_reclaim) {
+ if (demote_ok(gl)) {
+ spin_lock(&lru_lock);
+
+ if (!list_empty(&gl->gl_lru))
+ list_del_init(&gl->gl_lru);
+ else
+ atomic_inc(&lru_count);
+
list_add_tail(&gl->gl_lru, &lru_list);
- atomic_inc(&lru_count);
+ spin_unlock(&lru_lock);
}
- spin_unlock(&lru_lock);
+}
+
+void gfs2_glock_schedule_for_reclaim(struct gfs2_glock *gl)
+{
+ spin_lock(&gl->gl_spin);
+ __gfs2_glock_schedule_for_reclaim(gl);
+ spin_unlock(&gl->gl_spin);
}
/**
@@ -227,7 +202,6 @@ void gfs2_glock_put_nolock(struct gfs2_glock *gl)
{
if (atomic_dec_and_test(&gl->gl_ref))
GLOCK_BUG_ON(gl, 1);
- gfs2_glock_schedule_for_reclaim(gl);
}
/**
@@ -236,30 +210,26 @@ void gfs2_glock_put_nolock(struct gfs2_glock *gl)
*
*/
-int gfs2_glock_put(struct gfs2_glock *gl)
+void gfs2_glock_put(struct gfs2_glock *gl)
{
- int rv = 0;
+ struct gfs2_sbd *sdp = gl->gl_sbd;
+ struct address_space *mapping = gfs2_glock2aspace(gl);
- write_lock(gl_lock_addr(gl->gl_hash));
- if (atomic_dec_and_lock(&gl->gl_ref, &lru_lock)) {
- hlist_del(&gl->gl_list);
+ if (atomic_dec_and_test(&gl->gl_ref)) {
+ spin_lock_bucket(gl->gl_hash);
+ hlist_bl_del_rcu(&gl->gl_list);
+ spin_unlock_bucket(gl->gl_hash);
+ spin_lock(&lru_lock);
if (!list_empty(&gl->gl_lru)) {
list_del_init(&gl->gl_lru);
atomic_dec(&lru_count);
}
spin_unlock(&lru_lock);
- write_unlock(gl_lock_addr(gl->gl_hash));
GLOCK_BUG_ON(gl, !list_empty(&gl->gl_holders));
- glock_free(gl);
- rv = 1;
- goto out;
+ GLOCK_BUG_ON(gl, mapping && mapping->nrpages);
+ trace_gfs2_glock_put(gl);
+ sdp->sd_lockstruct.ls_ops->lm_put_lock(gl);
}
- spin_lock(&gl->gl_spin);
- gfs2_glock_schedule_for_reclaim(gl);
- spin_unlock(&gl->gl_spin);
- write_unlock(gl_lock_addr(gl->gl_hash));
-out:
- return rv;
}
/**
@@ -275,17 +245,15 @@ static struct gfs2_glock *search_bucket(unsigned int hash,
const struct lm_lockname *name)
{
struct gfs2_glock *gl;
- struct hlist_node *h;
+ struct hlist_bl_node *h;
- hlist_for_each_entry(gl, h, &gl_hash_table[hash].hb_list, gl_list) {
+ hlist_bl_for_each_entry_rcu(gl, h, &gl_hash_table[hash], gl_list) {
if (!lm_name_equal(&gl->gl_name, name))
continue;
if (gl->gl_sbd != sdp)
continue;
-
- atomic_inc(&gl->gl_ref);
-
- return gl;
+ if (atomic_inc_not_zero(&gl->gl_ref))
+ return gl;
}
return NULL;
@@ -743,10 +711,11 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
struct gfs2_glock *gl, *tmp;
unsigned int hash = gl_hash(sdp, &name);
struct address_space *mapping;
+ struct kmem_cache *cachep;
- read_lock(gl_lock_addr(hash));
+ rcu_read_lock();
gl = search_bucket(hash, sdp, &name);
- read_unlock(gl_lock_addr(hash));
+ rcu_read_unlock();
*glp = gl;
if (gl)
@@ -755,9 +724,10 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
return -ENOENT;
if (glops->go_flags & GLOF_ASPACE)
- gl = kmem_cache_alloc(gfs2_glock_aspace_cachep, GFP_KERNEL);
+ cachep = gfs2_glock_aspace_cachep;
else
- gl = kmem_cache_alloc(gfs2_glock_cachep, GFP_KERNEL);
+ cachep = gfs2_glock_cachep;
+ gl = kmem_cache_alloc(cachep, GFP_KERNEL);
if (!gl)
return -ENOMEM;
@@ -790,15 +760,16 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
mapping->writeback_index = 0;
}
- write_lock(gl_lock_addr(hash));
+ spin_lock_bucket(hash);
tmp = search_bucket(hash, sdp, &name);
if (tmp) {
- write_unlock(gl_lock_addr(hash));
- glock_free(gl);
+ spin_unlock_bucket(hash);
+ kmem_cache_free(cachep, gl);
+ atomic_dec(&sdp->sd_glock_disposal);
gl = tmp;
} else {
- hlist_add_head(&gl->gl_list, &gl_hash_table[hash].hb_list);
- write_unlock(gl_lock_addr(hash));
+ hlist_bl_add_head_rcu(&gl->gl_list, &gl_hash_table[hash]);
+ spin_unlock_bucket(hash);
}
*glp = gl;
@@ -1007,13 +978,13 @@ fail:
insert_pt = &gh2->gh_list;
}
set_bit(GLF_QUEUED, &gl->gl_flags);
+ trace_gfs2_glock_queue(gh, 1);
if (likely(insert_pt == NULL)) {
list_add_tail(&gh->gh_list, &gl->gl_holders);
if (unlikely(gh->gh_flags & LM_FLAG_PRIORITY))
goto do_cancel;
return;
}
- trace_gfs2_glock_queue(gh, 1);
list_add_tail(&gh->gh_list, insert_pt);
do_cancel:
gh = list_entry(gl->gl_holders.next, struct gfs2_holder, gh_list);
@@ -1113,6 +1084,7 @@ void gfs2_glock_dq(struct gfs2_holder *gh)
!test_bit(GLF_DEMOTE, &gl->gl_flags))
fast_path = 1;
}
+ __gfs2_glock_schedule_for_reclaim(gl);
trace_gfs2_glock_queue(gh, 0);
spin_unlock(&gl->gl_spin);
if (likely(fast_path))
@@ -1276,10 +1248,8 @@ int gfs2_glock_nq_m(unsigned int num_gh, struct gfs2_holder *ghs)
void gfs2_glock_dq_m(unsigned int num_gh, struct gfs2_holder *ghs)
{
- unsigned int x;
-
- for (x = 0; x < num_gh; x++)
- gfs2_glock_dq(&ghs[x]);
+ while (num_gh--)
+ gfs2_glock_dq(&ghs[num_gh]);
}
/**
@@ -1291,10 +1261,8 @@ void gfs2_glock_dq_m(unsigned int num_gh, struct gfs2_holder *ghs)
void gfs2_glock_dq_uninit_m(unsigned int num_gh, struct gfs2_holder *ghs)
{
- unsigned int x;
-
- for (x = 0; x < num_gh; x++)
- gfs2_glock_dq_uninit(&ghs[x]);
+ while (num_gh--)
+ gfs2_glock_dq_uninit(&ghs[num_gh]);
}
void gfs2_glock_cb(struct gfs2_glock *gl, unsigned int state)
@@ -1440,42 +1408,30 @@ static struct shrinker glock_shrinker = {
* @sdp: the filesystem
* @bucket: the bucket
*
- * Returns: 1 if the bucket has entries
*/
-static int examine_bucket(glock_examiner examiner, struct gfs2_sbd *sdp,
+static void examine_bucket(glock_examiner examiner, const struct gfs2_sbd *sdp,
unsigned int hash)
{
- struct gfs2_glock *gl, *prev = NULL;
- int has_entries = 0;
- struct hlist_head *head = &gl_hash_table[hash].hb_list;
+ struct gfs2_glock *gl;
+ struct hlist_bl_head *head = &gl_hash_table[hash];
+ struct hlist_bl_node *pos;
- read_lock(gl_lock_addr(hash));
- /* Can't use hlist_for_each_entry - don't want prefetch here */
- if (hlist_empty(head))
- goto out;
- gl = list_entry(head->first, struct gfs2_glock, gl_list);
- while(1) {
- if (!sdp || gl->gl_sbd == sdp) {
- gfs2_glock_hold(gl);
- read_unlock(gl_lock_addr(hash));
- if (prev)
- gfs2_glock_put(prev);
- prev = gl;
+ rcu_read_lock();
+ hlist_bl_for_each_entry_rcu(gl, pos, head, gl_list) {
+ if ((gl->gl_sbd == sdp) && atomic_read(&gl->gl_ref))
examiner(gl);
- has_entries = 1;
- read_lock(gl_lock_addr(hash));
- }
- if (gl->gl_list.next == NULL)
- break;
- gl = list_entry(gl->gl_list.next, struct gfs2_glock, gl_list);
}
-out:
- read_unlock(gl_lock_addr(hash));
- if (prev)
- gfs2_glock_put(prev);
+ rcu_read_unlock();
cond_resched();
- return has_entries;
+}
+
+static void glock_hash_walk(glock_examiner examiner, const struct gfs2_sbd *sdp)
+{
+ unsigned x;
+
+ for (x = 0; x < GFS2_GL_HASH_SIZE; x++)
+ examine_bucket(examiner, sdp, x);
}
@@ -1529,10 +1485,21 @@ static void clear_glock(struct gfs2_glock *gl)
void gfs2_glock_thaw(struct gfs2_sbd *sdp)
{
- unsigned x;
+ glock_hash_walk(thaw_glock, sdp);
+}
- for (x = 0; x < GFS2_GL_HASH_SIZE; x++)
- examine_bucket(thaw_glock, sdp, x);
+static int dump_glock(struct seq_file *seq, struct gfs2_glock *gl)
+{
+ int ret;
+ spin_lock(&gl->gl_spin);
+ ret = __dump_glock(seq, gl);
+ spin_unlock(&gl->gl_spin);
+ return ret;
+}
+
+static void dump_glock_func(struct gfs2_glock *gl)
+{
+ dump_glock(NULL, gl);
}
/**
@@ -1545,13 +1512,10 @@ void gfs2_glock_thaw(struct gfs2_sbd *sdp)
void gfs2_gl_hash_clear(struct gfs2_sbd *sdp)
{
- unsigned int x;
-
- for (x = 0; x < GFS2_GL_HASH_SIZE; x++)
- examine_bucket(clear_glock, sdp, x);
+ glock_hash_walk(clear_glock, sdp);
flush_workqueue(glock_workqueue);
wait_event(sdp->sd_glock_wait, atomic_read(&sdp->sd_glock_disposal) == 0);
- gfs2_dump_lockstate(sdp);
+ glock_hash_walk(dump_glock_func, sdp);
}
void gfs2_glock_finish_truncate(struct gfs2_inode *ip)
@@ -1717,66 +1681,15 @@ out:
return error;
}
-static int dump_glock(struct seq_file *seq, struct gfs2_glock *gl)
-{
- int ret;
- spin_lock(&gl->gl_spin);
- ret = __dump_glock(seq, gl);
- spin_unlock(&gl->gl_spin);
- return ret;
-}
-/**
- * gfs2_dump_lockstate - print out the current lockstate
- * @sdp: the filesystem
- * @ub: the buffer to copy the information into
- *
- * If @ub is NULL, dump the lockstate to the console.
- *
- */
-
-static int gfs2_dump_lockstate(struct gfs2_sbd *sdp)
-{
- struct gfs2_glock *gl;
- struct hlist_node *h;
- unsigned int x;
- int error = 0;
-
- for (x = 0; x < GFS2_GL_HASH_SIZE; x++) {
-
- read_lock(gl_lock_addr(x));
-
- hlist_for_each_entry(gl, h, &gl_hash_table[x].hb_list, gl_list) {
- if (gl->gl_sbd != sdp)
- continue;
-
- error = dump_glock(NULL, gl);
- if (error)
- break;
- }
-
- read_unlock(gl_lock_addr(x));
-
- if (error)
- break;
- }
-
-
- return error;
-}
int __init gfs2_glock_init(void)
{
unsigned i;
for(i = 0; i < GFS2_GL_HASH_SIZE; i++) {
- INIT_HLIST_HEAD(&gl_hash_table[i].hb_list);
- }
-#ifdef GL_HASH_LOCK_SZ
- for(i = 0; i < GL_HASH_LOCK_SZ; i++) {
- rwlock_init(&gl_hash_locks[i]);
+ INIT_HLIST_BL_HEAD(&gl_hash_table[i]);
}
-#endif
glock_workqueue = alloc_workqueue("glock_workqueue", WQ_MEM_RECLAIM |
WQ_HIGHPRI | WQ_FREEZABLE, 0);
@@ -1802,62 +1715,54 @@ void gfs2_glock_exit(void)
destroy_workqueue(gfs2_delete_workqueue);
}
+static inline struct gfs2_glock *glock_hash_chain(unsigned hash)
+{
+ return hlist_bl_entry(hlist_bl_first_rcu(&gl_hash_table[hash]),
+ struct gfs2_glock, gl_list);
+}
+
+static inline struct gfs2_glock *glock_hash_next(struct gfs2_glock *gl)
+{
+ return hlist_bl_entry(rcu_dereference(gl->gl_list.next),
+ struct gfs2_glock, gl_list);
+}
+
static int gfs2_glock_iter_next(struct gfs2_glock_iter *gi)
{
struct gfs2_glock *gl;
-restart:
- read_lock(gl_lock_addr(gi->hash));
- gl = gi->gl;
- if (gl) {
- gi->gl = hlist_entry(gl->gl_list.next,
- struct gfs2_glock, gl_list);
- } else {
- gi->gl = hlist_entry(gl_hash_table[gi->hash].hb_list.first,
- struct gfs2_glock, gl_list);
- }
- if (gi->gl)
- gfs2_glock_hold(gi->gl);
- read_unlock(gl_lock_addr(gi->hash));
- if (gl)
- gfs2_glock_put(gl);
- while (gi->gl == NULL) {
- gi->hash++;
- if (gi->hash >= GFS2_GL_HASH_SIZE)
- return 1;
- read_lock(gl_lock_addr(gi->hash));
- gi->gl = hlist_entry(gl_hash_table[gi->hash].hb_list.first,
- struct gfs2_glock, gl_list);
- if (gi->gl)
- gfs2_glock_hold(gi->gl);
- read_unlock(gl_lock_addr(gi->hash));
- }
-
- if (gi->sdp != gi->gl->gl_sbd)
- goto restart;
+ do {
+ gl = gi->gl;
+ if (gl) {
+ gi->gl = glock_hash_next(gl);
+ } else {
+ gi->gl = glock_hash_chain(gi->hash);
+ }
+ while (gi->gl == NULL) {
+ gi->hash++;
+ if (gi->hash >= GFS2_GL_HASH_SIZE) {
+ rcu_read_unlock();
+ return 1;
+ }
+ gi->gl = glock_hash_chain(gi->hash);
+ }
+ /* Skip entries for other sb and dead entries */
+ } while (gi->sdp != gi->gl->gl_sbd || atomic_read(&gi->gl->gl_ref) == 0);
return 0;
}
-static void gfs2_glock_iter_free(struct gfs2_glock_iter *gi)
-{
- if (gi->gl)
- gfs2_glock_put(gi->gl);
- gi->gl = NULL;
-}
-
static void *gfs2_glock_seq_start(struct seq_file *seq, loff_t *pos)
{
struct gfs2_glock_iter *gi = seq->private;
loff_t n = *pos;
gi->hash = 0;
+ rcu_read_lock();
do {
- if (gfs2_glock_iter_next(gi)) {
- gfs2_glock_iter_free(gi);
+ if (gfs2_glock_iter_next(gi))
return NULL;
- }
} while (n--);
return gi->gl;
@@ -1870,10 +1775,8 @@ static void *gfs2_glock_seq_next(struct seq_file *seq, void *iter_ptr,
(*pos)++;
- if (gfs2_glock_iter_next(gi)) {
- gfs2_glock_iter_free(gi);
+ if (gfs2_glock_iter_next(gi))
return NULL;
- }
return gi->gl;
}
@@ -1881,7 +1784,10 @@ static void *gfs2_glock_seq_next(struct seq_file *seq, void *iter_ptr,
static void gfs2_glock_seq_stop(struct seq_file *seq, void *iter_ptr)
{
struct gfs2_glock_iter *gi = seq->private;
- gfs2_glock_iter_free(gi);
+
+ if (gi->gl)
+ rcu_read_unlock();
+ gi->gl = NULL;
}
static int gfs2_glock_seq_show(struct seq_file *seq, void *iter_ptr)
diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h
index 691851ceb6153f59b91cd64d1ce0fecea46904e0..aea160690e9446cb32c82709bda3f933e8d3193d 100644
--- a/fs/gfs2/glock.h
+++ b/fs/gfs2/glock.h
@@ -118,7 +118,7 @@ struct lm_lockops {
int (*lm_mount) (struct gfs2_sbd *sdp, const char *fsname);
void (*lm_unmount) (struct gfs2_sbd *sdp);
void (*lm_withdraw) (struct gfs2_sbd *sdp);
- void (*lm_put_lock) (struct kmem_cache *cachep, struct gfs2_glock *gl);
+ void (*lm_put_lock) (struct gfs2_glock *gl);
int (*lm_lock) (struct gfs2_glock *gl, unsigned int req_state,
unsigned int flags);
void (*lm_cancel) (struct gfs2_glock *gl);
@@ -174,7 +174,7 @@ int gfs2_glock_get(struct gfs2_sbd *sdp,
int create, struct gfs2_glock **glp);
void gfs2_glock_hold(struct gfs2_glock *gl);
void gfs2_glock_put_nolock(struct gfs2_glock *gl);
-int gfs2_glock_put(struct gfs2_glock *gl);
+void gfs2_glock_put(struct gfs2_glock *gl);
void gfs2_holder_init(struct gfs2_glock *gl, unsigned int state, unsigned flags,
struct gfs2_holder *gh);
void gfs2_holder_reinit(unsigned int state, unsigned flags,
@@ -223,25 +223,22 @@ static inline int gfs2_glock_nq_init(struct gfs2_glock *gl,
return error;
}
-/* Lock Value Block functions */
-
-int gfs2_lvb_hold(struct gfs2_glock *gl);
-void gfs2_lvb_unhold(struct gfs2_glock *gl);
-
-void gfs2_glock_cb(struct gfs2_glock *gl, unsigned int state);
-void gfs2_glock_complete(struct gfs2_glock *gl, int ret);
-void gfs2_reclaim_glock(struct gfs2_sbd *sdp);
-void gfs2_gl_hash_clear(struct gfs2_sbd *sdp);
-void gfs2_glock_finish_truncate(struct gfs2_inode *ip);
-void gfs2_glock_thaw(struct gfs2_sbd *sdp);
-
-int __init gfs2_glock_init(void);
-void gfs2_glock_exit(void);
-
-int gfs2_create_debugfs_file(struct gfs2_sbd *sdp);
-void gfs2_delete_debugfs_file(struct gfs2_sbd *sdp);
-int gfs2_register_debugfs(void);
-void gfs2_unregister_debugfs(void);
+extern void gfs2_glock_cb(struct gfs2_glock *gl, unsigned int state);
+extern void gfs2_glock_complete(struct gfs2_glock *gl, int ret);
+extern void gfs2_reclaim_glock(struct gfs2_sbd *sdp);
+extern void gfs2_gl_hash_clear(struct gfs2_sbd *sdp);
+extern void gfs2_glock_finish_truncate(struct gfs2_inode *ip);
+extern void gfs2_glock_thaw(struct gfs2_sbd *sdp);
+extern void gfs2_glock_schedule_for_reclaim(struct gfs2_glock *gl);
+extern void gfs2_glock_free(struct gfs2_glock *gl);
+
+extern int __init gfs2_glock_init(void);
+extern void gfs2_glock_exit(void);
+
+extern int gfs2_create_debugfs_file(struct gfs2_sbd *sdp);
+extern void gfs2_delete_debugfs_file(struct gfs2_sbd *sdp);
+extern int gfs2_register_debugfs(void);
+extern void gfs2_unregister_debugfs(void);
extern const struct lm_lockops gfs2_dlm_ops;
diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
index 263561bf1a5059b4bf644340faa6a4435c62d14f..3754e3cbf02bce2bf04b683bc9d36d48ec6a8bbe 100644
--- a/fs/gfs2/glops.c
+++ b/fs/gfs2/glops.c
@@ -56,20 +56,26 @@ static void gfs2_ail_empty_gl(struct gfs2_glock *gl)
BUG_ON(current->journal_info);
current->journal_info = &tr;
- gfs2_log_lock(sdp);
+ spin_lock(&sdp->sd_ail_lock);
while (!list_empty(head)) {
bd = list_entry(head->next, struct gfs2_bufdata,
bd_ail_gl_list);
bh = bd->bd_bh;
gfs2_remove_from_ail(bd);
+ spin_unlock(&sdp->sd_ail_lock);
+
bd->bd_bh = NULL;
bh->b_private = NULL;
bd->bd_blkno = bh->b_blocknr;
+ gfs2_log_lock(sdp);
gfs2_assert_withdraw(sdp, !buffer_busy(bh));
gfs2_trans_add_revoke(sdp, bd);
+ gfs2_log_unlock(sdp);
+
+ spin_lock(&sdp->sd_ail_lock);
}
gfs2_assert_withdraw(sdp, !atomic_read(&gl->gl_ail_count));
- gfs2_log_unlock(sdp);
+ spin_unlock(&sdp->sd_ail_lock);
gfs2_trans_end(sdp);
gfs2_log_flush(sdp, NULL);
@@ -206,8 +212,17 @@ static void inode_go_inval(struct gfs2_glock *gl, int flags)
static int inode_go_demote_ok(const struct gfs2_glock *gl)
{
struct gfs2_sbd *sdp = gl->gl_sbd;
+ struct gfs2_holder *gh;
+
if (sdp->sd_jindex == gl->gl_object || sdp->sd_rindex == gl->gl_object)
return 0;
+
+ if (!list_empty(&gl->gl_holders)) {
+ gh = list_entry(gl->gl_holders.next, struct gfs2_holder, gh_list);
+ if (gh->gh_list.next != &gl->gl_holders)
+ return 0;
+ }
+
return 1;
}
@@ -271,19 +286,6 @@ static int inode_go_dump(struct seq_file *seq, const struct gfs2_glock *gl)
return 0;
}
-/**
- * rgrp_go_demote_ok - Check to see if it's ok to unlock a RG's glock
- * @gl: the glock
- *
- * Returns: 1 if it's ok
- */
-
-static int rgrp_go_demote_ok(const struct gfs2_glock *gl)
-{
- const struct address_space *mapping = (const struct address_space *)(gl + 1);
- return !mapping->nrpages;
-}
-
/**
* rgrp_go_lock - operation done after an rgrp lock is locked by
* a first holder on this node.
@@ -410,7 +412,6 @@ const struct gfs2_glock_operations gfs2_inode_glops = {
const struct gfs2_glock_operations gfs2_rgrp_glops = {
.go_xmote_th = rgrp_go_sync,
.go_inval = rgrp_go_inval,
- .go_demote_ok = rgrp_go_demote_ok,
.go_lock = rgrp_go_lock,
.go_unlock = rgrp_go_unlock,
.go_dump = gfs2_rgrp_dump,
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index a79790c06275fb0e328b85107b39ccfc7a63ce31..870a89d6d4dcb6d74accba494f1393f2df2a6f7f 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -15,6 +15,8 @@
#include <linux/workqueue.h>
#include <linux/dlm.h>
#include <linux/buffer_head.h>
+#include <linux/rcupdate.h>
+#include <linux/rculist_bl.h>
#define DIO_WAIT 0x00000010
#define DIO_METADATA 0x00000020
@@ -201,7 +203,7 @@ enum {
};
struct gfs2_glock {
- struct hlist_node gl_list;
+ struct hlist_bl_node gl_list;
unsigned long gl_flags; /* GLF_... */
struct lm_lockname gl_name;
atomic_t gl_ref;
@@ -234,6 +236,7 @@ struct gfs2_glock {
atomic_t gl_ail_count;
struct delayed_work gl_work;
struct work_struct gl_delete;
+ struct rcu_head gl_rcu;
};
#define GFS2_MIN_LVB_SIZE 32 /* Min size of LVB that gfs2 supports */
@@ -314,6 +317,7 @@ enum {
QDF_USER = 0,
QDF_CHANGE = 1,
QDF_LOCKED = 2,
+ QDF_REFRESH = 3,
};
struct gfs2_quota_data {
@@ -647,6 +651,7 @@ struct gfs2_sbd {
unsigned int sd_log_flush_head;
u64 sd_log_flush_wrapped;
+ spinlock_t sd_ail_lock;
struct list_head sd_ail1_list;
struct list_head sd_ail2_list;
u64 sd_ail_sync_gen;
diff --git a/fs/gfs2/lock_dlm.c b/fs/gfs2/lock_dlm.c
index 6e493aee28f82dfb593574f751ed81025207645c..98c80d8c2a62df79273433cb494a3f05d35ae02c 100644
--- a/fs/gfs2/lock_dlm.c
+++ b/fs/gfs2/lock_dlm.c
@@ -22,7 +22,6 @@ static void gdlm_ast(void *arg)
{
struct gfs2_glock *gl = arg;
unsigned ret = gl->gl_state;
- struct gfs2_sbd *sdp = gl->gl_sbd;
BUG_ON(gl->gl_lksb.sb_flags & DLM_SBF_DEMOTED);
@@ -31,12 +30,7 @@ static void gdlm_ast(void *arg)
switch (gl->gl_lksb.sb_status) {
case -DLM_EUNLOCK: /* Unlocked, so glock can be freed */
- if (gl->gl_ops->go_flags & GLOF_ASPACE)
- kmem_cache_free(gfs2_glock_aspace_cachep, gl);
- else
- kmem_cache_free(gfs2_glock_cachep, gl);
- if (atomic_dec_and_test(&sdp->sd_glock_disposal))
- wake_up(&sdp->sd_glock_wait);
+ gfs2_glock_free(gl);
return;
case -DLM_ECANCEL: /* Cancel while getting lock */
ret |= LM_OUT_CANCELED;
@@ -164,16 +158,14 @@ static int gdlm_lock(struct gfs2_glock *gl, unsigned int req_state,
GDLM_STRNAME_BYTES - 1, 0, gdlm_ast, gl, gdlm_bast);
}
-static void gdlm_put_lock(struct kmem_cache *cachep, struct gfs2_glock *gl)
+static void gdlm_put_lock(struct gfs2_glock *gl)
{
struct gfs2_sbd *sdp = gl->gl_sbd;
struct lm_lockstruct *ls = &sdp->sd_lockstruct;
int error;
if (gl->gl_lksb.sb_lkid == 0) {
- kmem_cache_free(cachep, gl);
- if (atomic_dec_and_test(&sdp->sd_glock_disposal))
- wake_up(&sdp->sd_glock_wait);
+ gfs2_glock_free(gl);
return;
}
diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c
index eb01f3575e102a0216a89d30b041e284e78a560d..e7ed31f858dda0b9219391adb94ab639885b3673 100644
--- a/fs/gfs2/log.c
+++ b/fs/gfs2/log.c
@@ -67,7 +67,7 @@ unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
* @mapping: The associated mapping (maybe NULL)
* @bd: The gfs2_bufdata to remove
*
- * The log lock _must_ be held when calling this function
+ * The ail lock _must_ be held when calling this function
*
*/
@@ -88,8 +88,8 @@ void gfs2_remove_from_ail(struct gfs2_bufdata *bd)
*/
static void gfs2_ail1_start_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
-__releases(&sdp->sd_log_lock)
-__acquires(&sdp->sd_log_lock)
+__releases(&sdp->sd_ail_lock)
+__acquires(&sdp->sd_ail_lock)
{
struct gfs2_bufdata *bd, *s;
struct buffer_head *bh;
@@ -117,7 +117,7 @@ __acquires(&sdp->sd_log_lock)
list_move(&bd->bd_ail_st_list, &ai->ai_ail1_list);
get_bh(bh);
- gfs2_log_unlock(sdp);
+ spin_unlock(&sdp->sd_ail_lock);
lock_buffer(bh);
if (test_clear_buffer_dirty(bh)) {
bh->b_end_io = end_buffer_write_sync;
@@ -126,7 +126,7 @@ __acquires(&sdp->sd_log_lock)
unlock_buffer(bh);
brelse(bh);
}
- gfs2_log_lock(sdp);
+ spin_lock(&sdp->sd_ail_lock);
retry = 1;
break;
@@ -175,10 +175,10 @@ static void gfs2_ail1_start(struct gfs2_sbd *sdp)
struct gfs2_ail *ai;
int done = 0;
- gfs2_log_lock(sdp);
+ spin_lock(&sdp->sd_ail_lock);
head = &sdp->sd_ail1_list;
if (list_empty(head)) {
- gfs2_log_unlock(sdp);
+ spin_unlock(&sdp->sd_ail_lock);
return;
}
sync_gen = sdp->sd_ail_sync_gen++;
@@ -189,13 +189,13 @@ static void gfs2_ail1_start(struct gfs2_sbd *sdp)
if (ai->ai_sync_gen >= sync_gen)
continue;
ai->ai_sync_gen = sync_gen;
- gfs2_ail1_start_one(sdp, ai); /* This may drop log lock */
+ gfs2_ail1_start_one(sdp, ai); /* This may drop ail lock */
done = 0;
break;
}
}
- gfs2_log_unlock(sdp);
+ spin_unlock(&sdp->sd_ail_lock);
}
static int gfs2_ail1_empty(struct gfs2_sbd *sdp, int flags)
@@ -203,7 +203,7 @@ static int gfs2_ail1_empty(struct gfs2_sbd *sdp, int flags)
struct gfs2_ail *ai, *s;
int ret;
- gfs2_log_lock(sdp);
+ spin_lock(&sdp->sd_ail_lock);
list_for_each_entry_safe_reverse(ai, s, &sdp->sd_ail1_list, ai_list) {
if (gfs2_ail1_empty_one(sdp, ai, flags))
@@ -214,7 +214,7 @@ static int gfs2_ail1_empty(struct gfs2_sbd *sdp, int flags)
ret = list_empty(&sdp->sd_ail1_list);
- gfs2_log_unlock(sdp);
+ spin_unlock(&sdp->sd_ail_lock);
return ret;
}
@@ -247,7 +247,7 @@ static void ail2_empty(struct gfs2_sbd *sdp, unsigned int new_tail)
int wrap = (new_tail < old_tail);
int a, b, rm;
- gfs2_log_lock(sdp);
+ spin_lock(&sdp->sd_ail_lock);
list_for_each_entry_safe(ai, safe, &sdp->sd_ail2_list, ai_list) {
a = (old_tail <= ai->ai_first);
@@ -263,7 +263,7 @@ static void ail2_empty(struct gfs2_sbd *sdp, unsigned int new_tail)
kfree(ai);
}
- gfs2_log_unlock(sdp);
+ spin_unlock(&sdp->sd_ail_lock);
}
/**
@@ -421,7 +421,7 @@ static unsigned int current_tail(struct gfs2_sbd *sdp)
struct gfs2_ail *ai;
unsigned int tail;
- gfs2_log_lock(sdp);
+ spin_lock(&sdp->sd_ail_lock);
if (list_empty(&sdp->sd_ail1_list)) {
tail = sdp->sd_log_head;
@@ -430,7 +430,7 @@ static unsigned int current_tail(struct gfs2_sbd *sdp)
tail = ai->ai_first;
}
- gfs2_log_unlock(sdp);
+ spin_unlock(&sdp->sd_ail_lock);
return tail;
}
@@ -743,10 +743,12 @@ void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl)
sdp->sd_log_commited_databuf = 0;
sdp->sd_log_commited_revoke = 0;
+ spin_lock(&sdp->sd_ail_lock);
if (!list_empty(&ai->ai_ail1_list)) {
list_add(&ai->ai_list, &sdp->sd_ail1_list);
ai = NULL;
}
+ spin_unlock(&sdp->sd_ail_lock);
gfs2_log_unlock(sdp);
trace_gfs2_log_flush(sdp, 0);
up_write(&sdp->sd_log_flush_lock);
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
index bf33f822058d352b5d7004f4d833cb714a5c2fef..e919abf25ecde693dcb361412ea7438d5a5f7510 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -51,8 +51,10 @@ static void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh)
/* If this buffer is in the AIL and it has already been written
* to in-place disk block, remove it from the AIL.
*/
+ spin_lock(&sdp->sd_ail_lock);
if (bd->bd_ail)
list_move(&bd->bd_ail_st_list, &bd->bd_ail->ai_ail2_list);
+ spin_unlock(&sdp->sd_ail_lock);
get_bh(bh);
atomic_inc(&sdp->sd_log_pinned);
trace_gfs2_pin(bd, 1);
@@ -80,7 +82,7 @@ static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh,
mark_buffer_dirty(bh);
clear_buffer_pinned(bh);
- gfs2_log_lock(sdp);
+ spin_lock(&sdp->sd_ail_lock);
if (bd->bd_ail) {
list_del(&bd->bd_ail_st_list);
brelse(bh);
@@ -91,9 +93,11 @@ static void gfs2_unpin(struct gfs2_sbd *sdp, struct buffer_head *bh,
}
bd->bd_ail = ai;
list_add(&bd->bd_ail_st_list, &ai->ai_ail1_list);
- clear_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
+ spin_unlock(&sdp->sd_ail_lock);
+
+ if (test_and_clear_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags))
+ gfs2_glock_schedule_for_reclaim(bd->bd_gl);
trace_gfs2_pin(bd, 0);
- gfs2_log_unlock(sdp);
unlock_buffer(bh);
atomic_dec(&sdp->sd_log_pinned);
}
diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c
index 72c31a315d9658e1a03ca830ebbf7a14d06d08f4..888a5f5a1a583104b3b093f3257c84f152b3ce0e 100644
--- a/fs/gfs2/main.c
+++ b/fs/gfs2/main.c
@@ -14,6 +14,8 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/gfs2_ondisk.h>
+#include <linux/rcupdate.h>
+#include <linux/rculist_bl.h>
#include <asm/atomic.h>
#include "gfs2.h"
@@ -45,7 +47,7 @@ static void gfs2_init_glock_once(void *foo)
{
struct gfs2_glock *gl = foo;
- INIT_HLIST_NODE(&gl->gl_list);
+ INIT_HLIST_BL_NODE(&gl->gl_list);
spin_lock_init(&gl->gl_spin);
INIT_LIST_HEAD(&gl->gl_holders);
INIT_LIST_HEAD(&gl->gl_lru);
@@ -191,6 +193,8 @@ static void __exit exit_gfs2_fs(void)
unregister_filesystem(&gfs2meta_fs_type);
destroy_workqueue(gfs_recovery_wq);
+ rcu_barrier();
+
kmem_cache_destroy(gfs2_quotad_cachep);
kmem_cache_destroy(gfs2_rgrpd_cachep);
kmem_cache_destroy(gfs2_bufdata_cachep);
diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
index 939739c7b3f9deb30cf2a2df4ce3c4ba8290b697..01d97f4865535cb11accdd4689dddfa2c5ece66a 100644
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -326,6 +326,7 @@ void gfs2_remove_from_journal(struct buffer_head *bh, struct gfs2_trans *tr, int
brelse(bh);
}
if (bd) {
+ spin_lock(&sdp->sd_ail_lock);
if (bd->bd_ail) {
gfs2_remove_from_ail(bd);
bh->b_private = NULL;
@@ -333,6 +334,7 @@ void gfs2_remove_from_journal(struct buffer_head *bh, struct gfs2_trans *tr, int
bd->bd_blkno = bh->b_blocknr;
gfs2_trans_add_revoke(sdp, bd);
}
+ spin_unlock(&sdp->sd_ail_lock);
}
clear_buffer_dirty(bh);
clear_buffer_uptodate(bh);
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 777927ce6f79041d9bbc8c1383204c51fcbad8ab..42ef24355afbdb112e366269d3835cc40b37cff6 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -99,6 +99,7 @@ static struct gfs2_sbd *init_sbd(struct super_block *sb)
init_waitqueue_head(&sdp->sd_log_waitq);
init_waitqueue_head(&sdp->sd_logd_waitq);
+ spin_lock_init(&sdp->sd_ail_lock);
INIT_LIST_HEAD(&sdp->sd_ail1_list);
INIT_LIST_HEAD(&sdp->sd_ail2_list);
@@ -928,17 +929,9 @@ static const match_table_t nolock_tokens = {
{ Opt_err, NULL },
};
-static void nolock_put_lock(struct kmem_cache *cachep, struct gfs2_glock *gl)
-{
- struct gfs2_sbd *sdp = gl->gl_sbd;
- kmem_cache_free(cachep, gl);
- if (atomic_dec_and_test(&sdp->sd_glock_disposal))
- wake_up(&sdp->sd_glock_wait);
-}
-
static const struct lm_lockops nolock_ops = {
.lm_proto_name = "lock_nolock",
- .lm_put_lock = nolock_put_lock,
+ .lm_put_lock = gfs2_glock_free,
.lm_tokens = &nolock_tokens,
};
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index d8b26ac2e20be7c7fe7b91b136c69e3e319a531b..09e436a507239c6f1ec4852d1b4b7c68dcdcfb59 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -1026,9 +1026,9 @@ static void gfs2_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
/**
* gfs2_permission -
- * @inode:
- * @mask:
- * @nd: passed from Linux VFS, ignored by us
+ * @inode: The inode
+ * @mask: The mask to be tested
+ * @flags: Indicates whether this is an RCU path walk or not
*
* This may be called from the VFS directly, or from within GFS2 with the
* inode locked, so we look to see if the glock is already locked and only
@@ -1044,11 +1044,11 @@ int gfs2_permission(struct inode *inode, int mask, unsigned int flags)
int error;
int unlock = 0;
- if (flags & IPERM_FLAG_RCU)
- return -ECHILD;
ip = GFS2_I(inode);
if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
+ if (flags & IPERM_FLAG_RCU)
+ return -ECHILD;
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
if (error)
return error;
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index a689901963dea43c82b6178a4451c09560061e76..e23d9864c418d69c0abdce5d699a20904baa3779 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -834,6 +834,7 @@ static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
goto out_end_trans;
do_qc(qd, -qd->qd_change_sync);
+ set_bit(QDF_REFRESH, &qd->qd_flags);
}
error = 0;
@@ -929,6 +930,7 @@ int gfs2_quota_lock(struct gfs2_inode *ip, u32 uid, u32 gid)
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct gfs2_alloc *al = ip->i_alloc;
+ struct gfs2_quota_data *qd;
unsigned int x;
int error = 0;
@@ -942,7 +944,11 @@ int gfs2_quota_lock(struct gfs2_inode *ip, u32 uid, u32 gid)
sort_qd, NULL);
for (x = 0; x < al->al_qd_num; x++) {
- error = do_glock(al->al_qd[x], NO_FORCE, &al->al_qd_ghs[x]);
+ int force = NO_FORCE;
+ qd = al->al_qd[x];
+ if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags))
+ force = FORCE;
+ error = do_glock(qd, force, &al->al_qd_ghs[x]);
if (error)
break;
}
@@ -1587,6 +1593,8 @@ static int gfs2_set_dqblk(struct super_block *sb, int type, qid_t id,
offset = qd2offset(qd);
alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota));
+ if (gfs2_is_stuffed(ip))
+ alloc_required = 1;
if (alloc_required) {
al = gfs2_alloc_get(ip);
if (al == NULL)
@@ -1600,7 +1608,9 @@ static int gfs2_set_dqblk(struct super_block *sb, int type, qid_t id,
blocks += gfs2_rg_blocks(al);
}
- error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 1, 0);
+ /* Some quotas span block boundaries and can update two blocks,
+ adding an extra block to the transaction to handle such quotas */
+ error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0);
if (error)
goto out_release;
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 7293ea27020c680307e0145e863ebbb7eb0d6949..cf930cd9664af9ca0c351e08c0d852f52c52417d 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -1602,7 +1602,7 @@ rgrp_error:
*
*/
-void gfs2_free_data(struct gfs2_inode *ip, u64 bstart, u32 blen)
+void __gfs2_free_data(struct gfs2_inode *ip, u64 bstart, u32 blen)
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct gfs2_rgrpd *rgd;
@@ -1617,7 +1617,21 @@ void gfs2_free_data(struct gfs2_inode *ip, u64 bstart, u32 blen)
gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data);
gfs2_trans_add_rg(rgd);
+}
+/**
+ * gfs2_free_data - free a contiguous run of data block(s)
+ * @ip: the inode these blocks are being freed from
+ * @bstart: first block of a run of contiguous blocks
+ * @blen: the length of the block run
+ *
+ */
+
+void gfs2_free_data(struct gfs2_inode *ip, u64 bstart, u32 blen)
+{
+ struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
+
+ __gfs2_free_data(ip, bstart, blen);
gfs2_statfs_change(sdp, 0, +blen, 0);
gfs2_quota_change(ip, -(s64)blen, ip->i_inode.i_uid, ip->i_inode.i_gid);
}
@@ -1630,7 +1644,7 @@ void gfs2_free_data(struct gfs2_inode *ip, u64 bstart, u32 blen)
*
*/
-void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen)
+void __gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen)
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct gfs2_rgrpd *rgd;
@@ -1645,10 +1659,24 @@ void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen)
gfs2_rgrp_out(rgd, rgd->rd_bits[0].bi_bh->b_data);
gfs2_trans_add_rg(rgd);
+ gfs2_meta_wipe(ip, bstart, blen);
+}
+/**
+ * gfs2_free_meta - free a contiguous run of data block(s)
+ * @ip: the inode these blocks are being freed from
+ * @bstart: first block of a run of contiguous blocks
+ * @blen: the length of the block run
+ *
+ */
+
+void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen)
+{
+ struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
+
+ __gfs2_free_meta(ip, bstart, blen);
gfs2_statfs_change(sdp, 0, +blen, 0);
gfs2_quota_change(ip, -(s64)blen, ip->i_inode.i_uid, ip->i_inode.i_gid);
- gfs2_meta_wipe(ip, bstart, blen);
}
void gfs2_unlink_di(struct inode *inode)
diff --git a/fs/gfs2/rgrp.h b/fs/gfs2/rgrp.h
index 50c2bb04369c8dd617fed95513461f6dc3651d0d..a80e3034ac470c44b4d456085909c7e9aef1db77 100644
--- a/fs/gfs2/rgrp.h
+++ b/fs/gfs2/rgrp.h
@@ -52,7 +52,9 @@ extern int gfs2_ri_update(struct gfs2_inode *ip);
extern int gfs2_alloc_block(struct gfs2_inode *ip, u64 *bn, unsigned int *n);
extern int gfs2_alloc_di(struct gfs2_inode *ip, u64 *bn, u64 *generation);
+extern void __gfs2_free_data(struct gfs2_inode *ip, u64 bstart, u32 blen);
extern void gfs2_free_data(struct gfs2_inode *ip, u64 bstart, u32 blen);
+extern void __gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen);
extern void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen);
extern void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip);
extern void gfs2_unlink_di(struct inode *inode);