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-rw-r--r--fs/gfs2/glock.h13
-rw-r--r--fs/gfs2/inode.c2
-rw-r--r--fs/gfs2/ops_address.c27
-rw-r--r--fs/gfs2/ops_dentry.c4
-rw-r--r--fs/gfs2/ops_inode.c4
5 files changed, 26 insertions, 24 deletions
diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h
index ace5770760c..cdad3e6f815 100644
--- a/fs/gfs2/glock.h
+++ b/fs/gfs2/glock.h
@@ -32,24 +32,23 @@
#define GLR_TRYFAILED 13
#define GLR_CANCELED 14
-static inline int gfs2_glock_is_locked_by_me(struct gfs2_glock *gl)
+static inline struct gfs2_holder *gfs2_glock_is_locked_by_me(struct gfs2_glock *gl)
{
struct gfs2_holder *gh;
- int locked = 0;
struct pid *pid;
/* Look in glock's list of holders for one with current task as owner */
spin_lock(&gl->gl_spin);
pid = task_pid(current);
list_for_each_entry(gh, &gl->gl_holders, gh_list) {
- if (gh->gh_owner_pid == pid) {
- locked = 1;
- break;
- }
+ if (gh->gh_owner_pid == pid)
+ goto out;
}
+ gh = NULL;
+out:
spin_unlock(&gl->gl_spin);
- return locked;
+ return gh;
}
static inline int gfs2_glock_is_held_excl(struct gfs2_glock *gl)
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 5f50dd53bf6..810ff023fb1 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -493,7 +493,7 @@ struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
return dir;
}
- if (gfs2_glock_is_locked_by_me(dip->i_gl) == 0) {
+ if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) {
error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
if (error)
return ERR_PTR(error);
diff --git a/fs/gfs2/ops_address.c b/fs/gfs2/ops_address.c
index 7523999afc5..fbb4a6aa158 100644
--- a/fs/gfs2/ops_address.c
+++ b/fs/gfs2/ops_address.c
@@ -508,23 +508,26 @@ static int __gfs2_readpage(void *file, struct page *page)
static int gfs2_readpage(struct file *file, struct page *page)
{
struct gfs2_inode *ip = GFS2_I(page->mapping->host);
- struct gfs2_holder gh;
+ struct gfs2_holder *gh;
int error;
- gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME|LM_FLAG_TRY_1CB, &gh);
- error = gfs2_glock_nq_atime(&gh);
- if (unlikely(error)) {
+ gh = gfs2_glock_is_locked_by_me(ip->i_gl);
+ if (!gh) {
+ gh = kmalloc(sizeof(struct gfs2_holder), GFP_NOFS);
+ if (!gh)
+ return -ENOBUFS;
+ gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, gh);
unlock_page(page);
- goto out;
+ error = gfs2_glock_nq_atime(gh);
+ if (likely(error != 0))
+ goto out;
+ return AOP_TRUNCATED_PAGE;
}
error = __gfs2_readpage(file, page);
- gfs2_glock_dq(&gh);
+ gfs2_glock_dq(gh);
out:
- gfs2_holder_uninit(&gh);
- if (error == GLR_TRYFAILED) {
- yield();
- return AOP_TRUNCATED_PAGE;
- }
+ gfs2_holder_uninit(gh);
+ kfree(gh);
return error;
}
@@ -826,7 +829,7 @@ static int gfs2_write_end(struct file *file, struct address_space *mapping,
unsigned int to = from + len;
int ret;
- BUG_ON(gfs2_glock_is_locked_by_me(ip->i_gl) == 0);
+ BUG_ON(gfs2_glock_is_locked_by_me(ip->i_gl) == NULL);
ret = gfs2_meta_inode_buffer(ip, &dibh);
if (unlikely(ret)) {
diff --git a/fs/gfs2/ops_dentry.c b/fs/gfs2/ops_dentry.c
index 793e334d098..4a5e676b442 100644
--- a/fs/gfs2/ops_dentry.c
+++ b/fs/gfs2/ops_dentry.c
@@ -43,7 +43,7 @@ static int gfs2_drevalidate(struct dentry *dentry, struct nameidata *nd)
struct gfs2_holder d_gh;
struct gfs2_inode *ip = NULL;
int error;
- int had_lock=0;
+ int had_lock = 0;
if (inode) {
if (is_bad_inode(inode))
@@ -54,7 +54,7 @@ static int gfs2_drevalidate(struct dentry *dentry, struct nameidata *nd)
if (sdp->sd_args.ar_localcaching)
goto valid;
- had_lock = gfs2_glock_is_locked_by_me(dip->i_gl);
+ had_lock = (gfs2_glock_is_locked_by_me(dip->i_gl) != NULL);
if (!had_lock) {
error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
if (error)
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index 301c9459667..af7097a514c 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -898,7 +898,7 @@ static int gfs2_permission(struct inode *inode, int mask, struct nameidata *nd)
int error;
int unlock = 0;
- if (gfs2_glock_is_locked_by_me(ip->i_gl) == 0) {
+ if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
if (error)
return error;
@@ -1065,7 +1065,7 @@ static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
int error;
int unlock = 0;
- if (gfs2_glock_is_locked_by_me(ip->i_gl) == 0) {
+ if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
if (error)
return error;