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authorMark Fasheh <mark.fasheh@oracle.com>2007-12-20 16:49:04 -0800
committerMark Fasheh <mark.fasheh@oracle.com>2008-01-25 15:05:43 -0800
commit53fc622b9e829c8e632e45ef8c14f054388759c1 (patch)
tree6b8585ab00312dd798d8087c452393bf6cc0d344 /fs/ocfs2/file.c
parentcf8e06f1a860d8680d6bb4ac8ec7d7724988e46f (diff)
[PATCH 2/2] ocfs2: cluster aware flock()
Hook up ocfs2_flock(), using the new flock lock type in dlmglue.c. A new mount option, "localflocks" is added so that users can revert to old functionality as need be. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Diffstat (limited to 'fs/ocfs2/file.c')
-rw-r--r--fs/ocfs2/file.c60
1 files changed, 59 insertions, 1 deletions
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 432e5f3c478..caefd571782 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -51,6 +51,7 @@
#include "inode.h"
#include "ioctl.h"
#include "journal.h"
+#include "locks.h"
#include "mmap.h"
#include "suballoc.h"
#include "super.h"
@@ -63,6 +64,35 @@ static int ocfs2_sync_inode(struct inode *inode)
return sync_mapping_buffers(inode->i_mapping);
}
+static int ocfs2_init_file_private(struct inode *inode, struct file *file)
+{
+ struct ocfs2_file_private *fp;
+
+ fp = kzalloc(sizeof(struct ocfs2_file_private), GFP_KERNEL);
+ if (!fp)
+ return -ENOMEM;
+
+ fp->fp_file = file;
+ mutex_init(&fp->fp_mutex);
+ ocfs2_file_lock_res_init(&fp->fp_flock, fp);
+ file->private_data = fp;
+
+ return 0;
+}
+
+static void ocfs2_free_file_private(struct inode *inode, struct file *file)
+{
+ struct ocfs2_file_private *fp = file->private_data;
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+
+ if (fp) {
+ ocfs2_simple_drop_lockres(osb, &fp->fp_flock);
+ ocfs2_lock_res_free(&fp->fp_flock);
+ kfree(fp);
+ file->private_data = NULL;
+ }
+}
+
static int ocfs2_file_open(struct inode *inode, struct file *file)
{
int status;
@@ -89,7 +119,18 @@ static int ocfs2_file_open(struct inode *inode, struct file *file)
oi->ip_open_count++;
spin_unlock(&oi->ip_lock);
- status = 0;
+
+ status = ocfs2_init_file_private(inode, file);
+ if (status) {
+ /*
+ * We want to set open count back if we're failing the
+ * open.
+ */
+ spin_lock(&oi->ip_lock);
+ oi->ip_open_count--;
+ spin_unlock(&oi->ip_lock);
+ }
+
leave:
mlog_exit(status);
return status;
@@ -108,11 +149,24 @@ static int ocfs2_file_release(struct inode *inode, struct file *file)
oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT;
spin_unlock(&oi->ip_lock);
+ ocfs2_free_file_private(inode, file);
+
mlog_exit(0);
return 0;
}
+static int ocfs2_dir_open(struct inode *inode, struct file *file)
+{
+ return ocfs2_init_file_private(inode, file);
+}
+
+static int ocfs2_dir_release(struct inode *inode, struct file *file)
+{
+ ocfs2_free_file_private(inode, file);
+ return 0;
+}
+
static int ocfs2_sync_file(struct file *file,
struct dentry *dentry,
int datasync)
@@ -2191,6 +2245,7 @@ const struct file_operations ocfs2_fops = {
#ifdef CONFIG_COMPAT
.compat_ioctl = ocfs2_compat_ioctl,
#endif
+ .flock = ocfs2_flock,
.splice_read = ocfs2_file_splice_read,
.splice_write = ocfs2_file_splice_write,
};
@@ -2199,8 +2254,11 @@ const struct file_operations ocfs2_dops = {
.read = generic_read_dir,
.readdir = ocfs2_readdir,
.fsync = ocfs2_sync_file,
+ .release = ocfs2_dir_release,
+ .open = ocfs2_dir_open,
.ioctl = ocfs2_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = ocfs2_compat_ioctl,
#endif
+ .flock = ocfs2_flock,
};