.. SPDX-License-Identifier: GPL-2.0
-==================
-Global File System
-==================
+====================
+Global File System 2
+====================
-https://fedorahosted.org/cluster/wiki/HomePage
-
-GFS is a cluster file system. It allows a cluster of computers to
+GFS2 is a cluster file system. It allows a cluster of computers to
simultaneously use a block device that is shared between them (with FC,
-iSCSI, NBD, etc). GFS reads and writes to the block device like a local
+iSCSI, NBD, etc). GFS2 reads and writes to the block device like a local
file system, but also uses a lock module to allow the computers coordinate
their I/O so file system consistency is maintained. One of the nifty
-features of GFS is perfect consistency -- changes made to the file system
+features of GFS2 is perfect consistency -- changes made to the file system
on one machine show up immediately on all other machines in the cluster.
-GFS uses interchangeable inter-node locking mechanisms, the currently
+GFS2 uses interchangeable inter-node locking mechanisms, the currently
supported mechanisms are:
lock_nolock
- - allows gfs to be used as a local file system
+ - allows GFS2 to be used as a local file system
lock_dlm
- - uses a distributed lock manager (dlm) for inter-node locking.
+ - uses the distributed lock manager (dlm) for inter-node locking.
The dlm is found at linux/fs/dlm/
-Lock_dlm depends on user space cluster management systems found
+lock_dlm depends on user space cluster management systems found
at the URL above.
-To use gfs as a local file system, no external clustering systems are
+To use GFS2 as a local file system, no external clustering systems are
needed, simply::
$ mkfs -t gfs2 -p lock_nolock -j 1 /dev/block_device
$ mount -t gfs2 /dev/block_device /dir
-If you are using Fedora, you need to install the gfs2-utils package
-and, for lock_dlm, you will also need to install the cman package
-and write a cluster.conf as per the documentation. For F17 and above
-cman has been replaced by the dlm package.
+The gfs2-utils package is required on all cluster nodes and, for lock_dlm, you
+will also need the dlm and corosync user space utilities configured as per the
+documentation.
+
+gfs2-utils can be found at https://pagure.io/gfs2-utils
GFS2 is not on-disk compatible with previous versions of GFS, but it
is pretty close.
-The following man pages can be found at the URL above:
+The following man pages are available from gfs2-utils:
============ =============================================
fsck.gfs2 to repair a filesystem
gfs2_grow to expand a filesystem online
gfs2_jadd to add journals to a filesystem online
tunegfs2 to manipulate, examine and tune a filesystem
- gfs2_convert to convert a gfs filesystem to gfs2 in-place
+ gfs2_convert to convert a gfs filesystem to GFS2 in-place
mkfs.gfs2 to make a filesystem
============ =============================================
M: Andreas Gruenbacher <agruenba@redhat.com>
L: cluster-devel@redhat.com
S: Supported
-W: http://sources.redhat.com/cluster/
+B: https://bugzilla.kernel.org/enter_bug.cgi?product=File%20System&component=gfs2
T: git git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git
F: Documentation/filesystems/gfs2*
F: fs/gfs2/
clear_bit(GLF_PENDING_DELETE, &gl->gl_flags);
spin_unlock(&gl->gl_lockref.lock);
- /* If someone's using this glock to create a new dinode, the block must
- have been freed by another node, then re-used, in which case our
- iopen callback is too late after the fact. Ignore it. */
- if (test_bit(GLF_INODE_CREATING, &gl->gl_flags))
- goto out;
-
if (test_bit(GLF_DEMOTE, &gl->gl_flags)) {
/*
* If we can evict the inode, give the remote node trying to
*p++ = 'o';
if (test_bit(GLF_BLOCKING, gflags))
*p++ = 'b';
- if (test_bit(GLF_INODE_CREATING, gflags))
- *p++ = 'c';
if (test_bit(GLF_PENDING_DELETE, gflags))
*p++ = 'P';
if (test_bit(GLF_FREEING, gflags))
GLF_LRU = 13,
GLF_OBJECT = 14, /* Used only for tracing */
GLF_BLOCKING = 15,
- GLF_INODE_CREATING = 16, /* Inode creation occurring */
GLF_PENDING_DELETE = 17,
GLF_FREEING = 18, /* Wait for glock to be freed */
};
#include "super.h"
#include "glops.h"
+static const struct inode_operations gfs2_file_iops;
+static const struct inode_operations gfs2_dir_iops;
+static const struct inode_operations gfs2_symlink_iops;
+
static int iget_test(struct inode *inode, void *opaque)
{
u64 no_addr = *(u64 *)opaque;
struct inode *inode = NULL;
struct gfs2_inode *dip = GFS2_I(dir), *ip;
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
- struct gfs2_glock *io_gl = NULL;
+ struct gfs2_glock *io_gl;
int error, free_vfs_inode = 1;
u32 aflags = 0;
unsigned blocks = 1;
init_dinode(dip, ip, symname);
gfs2_trans_end(sdp);
- BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags));
-
error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
if (error)
goto fail_gunlock2;
gfs2_glock_dq_uninit(ghs);
gfs2_qa_put(ip);
gfs2_glock_dq_uninit(ghs + 1);
- clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
gfs2_glock_put(io_gl);
gfs2_qa_put(dip);
return error;
glock_clear_object(io_gl, ip);
gfs2_glock_dq_uninit(&ip->i_iopen_gh);
fail_gunlock2:
- clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
glock_clear_object(io_gl, ip);
gfs2_glock_put(io_gl);
fail_free_inode:
return generic_update_time(inode, time, flags);
}
-const struct inode_operations gfs2_file_iops = {
+static const struct inode_operations gfs2_file_iops = {
.permission = gfs2_permission,
.setattr = gfs2_setattr,
.getattr = gfs2_getattr,
.update_time = gfs2_update_time,
};
-const struct inode_operations gfs2_dir_iops = {
+static const struct inode_operations gfs2_dir_iops = {
.create = gfs2_create,
.lookup = gfs2_lookup,
.link = gfs2_link,
.atomic_open = gfs2_atomic_open,
};
-const struct inode_operations gfs2_symlink_iops = {
+static const struct inode_operations gfs2_symlink_iops = {
.get_link = gfs2_get_link,
.permission = gfs2_permission,
.setattr = gfs2_setattr,
extern loff_t gfs2_seek_data(struct file *file, loff_t offset);
extern loff_t gfs2_seek_hole(struct file *file, loff_t offset);
-extern const struct inode_operations gfs2_file_iops;
-extern const struct inode_operations gfs2_dir_iops;
-extern const struct inode_operations gfs2_symlink_iops;
extern const struct file_operations gfs2_file_fops_nolock;
extern const struct file_operations gfs2_dir_fops_nolock;
struct buffer_head *m_bh, *l_bh;
int error;
- sb_start_write(sb);
error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE,
&gh);
if (error)
out_unlock:
gfs2_glock_dq_uninit(&gh);
out:
- sb_end_write(sb);
return error;
}
gfs2_glock_dq(&sdp->sd_jinode_gh);
if (test_bit(SDF_FS_FROZEN, &sdp->sd_flags)) {
/* Make sure gfs2_unfreeze works if partially-frozen */
- flush_workqueue(gfs2_freeze_wq);
+ flush_work(&sdp->sd_freeze_work);
atomic_set(&sdp->sd_freeze_state, SFS_FROZEN);
thaw_super(sdp->sd_vfs);
} else {
bool verbose);
#define gfs2_io_error(sdp) \
-gfs2_io_error_i((sdp), __func__, __FILE__, __LINE__);
+gfs2_io_error_i((sdp), __func__, __FILE__, __LINE__)
void gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
bool withdraw);
#define gfs2_io_error_bh_wd(sdp, bh) \
-gfs2_io_error_bh_i((sdp), (bh), __func__, __FILE__, __LINE__, true);
+gfs2_io_error_bh_i((sdp), (bh), __func__, __FILE__, __LINE__, true)
#define gfs2_io_error_bh(sdp, bh) \
-gfs2_io_error_bh_i((sdp), (bh), __func__, __FILE__, __LINE__, false);
+gfs2_io_error_bh_i((sdp), (bh), __func__, __FILE__, __LINE__, false)
extern struct kmem_cache *gfs2_glock_cachep;
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