nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
/*
|
|
|
|
* Copyright (c) 2014 Christoph Hellwig.
|
|
|
|
*/
|
2014-09-23 10:38:48 +00:00
|
|
|
#include <linux/kmod.h>
|
|
|
|
#include <linux/file.h>
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
#include <linux/jhash.h>
|
|
|
|
#include <linux/sched.h>
|
2014-09-23 10:38:48 +00:00
|
|
|
#include <linux/sunrpc/addr.h>
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
|
|
|
|
#include "pnfs.h"
|
|
|
|
#include "netns.h"
|
2014-08-17 00:02:22 +00:00
|
|
|
#include "trace.h"
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
|
|
|
|
#define NFSDDBG_FACILITY NFSDDBG_PNFS
|
|
|
|
|
|
|
|
struct nfs4_layout {
|
|
|
|
struct list_head lo_perstate;
|
|
|
|
struct nfs4_layout_stateid *lo_state;
|
|
|
|
struct nfsd4_layout_seg lo_seg;
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct kmem_cache *nfs4_layout_cache;
|
|
|
|
static struct kmem_cache *nfs4_layout_stateid_cache;
|
|
|
|
|
2014-09-23 10:38:48 +00:00
|
|
|
static struct nfsd4_callback_ops nfsd4_cb_layout_ops;
|
|
|
|
static const struct lock_manager_operations nfsd4_layouts_lm_ops;
|
|
|
|
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
const struct nfsd4_layout_ops *nfsd4_layout_ops[LAYOUT_TYPE_MAX] = {
|
2015-01-21 10:40:00 +00:00
|
|
|
[LAYOUT_BLOCK_VOLUME] = &bl_layout_ops,
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
/* pNFS device ID to export fsid mapping */
|
|
|
|
#define DEVID_HASH_BITS 8
|
|
|
|
#define DEVID_HASH_SIZE (1 << DEVID_HASH_BITS)
|
|
|
|
#define DEVID_HASH_MASK (DEVID_HASH_SIZE - 1)
|
|
|
|
static u64 nfsd_devid_seq = 1;
|
|
|
|
static struct list_head nfsd_devid_hash[DEVID_HASH_SIZE];
|
|
|
|
static DEFINE_SPINLOCK(nfsd_devid_lock);
|
|
|
|
|
|
|
|
static inline u32 devid_hashfn(u64 idx)
|
|
|
|
{
|
|
|
|
return jhash_2words(idx, idx >> 32, 0) & DEVID_HASH_MASK;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
nfsd4_alloc_devid_map(const struct svc_fh *fhp)
|
|
|
|
{
|
|
|
|
const struct knfsd_fh *fh = &fhp->fh_handle;
|
|
|
|
size_t fsid_len = key_len(fh->fh_fsid_type);
|
|
|
|
struct nfsd4_deviceid_map *map, *old;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
map = kzalloc(sizeof(*map) + fsid_len, GFP_KERNEL);
|
|
|
|
if (!map)
|
|
|
|
return;
|
|
|
|
|
|
|
|
map->fsid_type = fh->fh_fsid_type;
|
|
|
|
memcpy(&map->fsid, fh->fh_fsid, fsid_len);
|
|
|
|
|
|
|
|
spin_lock(&nfsd_devid_lock);
|
|
|
|
if (fhp->fh_export->ex_devid_map)
|
|
|
|
goto out_unlock;
|
|
|
|
|
|
|
|
for (i = 0; i < DEVID_HASH_SIZE; i++) {
|
|
|
|
list_for_each_entry(old, &nfsd_devid_hash[i], hash) {
|
|
|
|
if (old->fsid_type != fh->fh_fsid_type)
|
|
|
|
continue;
|
|
|
|
if (memcmp(old->fsid, fh->fh_fsid,
|
|
|
|
key_len(old->fsid_type)))
|
|
|
|
continue;
|
|
|
|
|
|
|
|
fhp->fh_export->ex_devid_map = old;
|
|
|
|
goto out_unlock;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
map->idx = nfsd_devid_seq++;
|
|
|
|
list_add_tail_rcu(&map->hash, &nfsd_devid_hash[devid_hashfn(map->idx)]);
|
|
|
|
fhp->fh_export->ex_devid_map = map;
|
|
|
|
map = NULL;
|
|
|
|
|
|
|
|
out_unlock:
|
|
|
|
spin_unlock(&nfsd_devid_lock);
|
|
|
|
kfree(map);
|
|
|
|
}
|
|
|
|
|
|
|
|
struct nfsd4_deviceid_map *
|
|
|
|
nfsd4_find_devid_map(int idx)
|
|
|
|
{
|
|
|
|
struct nfsd4_deviceid_map *map, *ret = NULL;
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
list_for_each_entry_rcu(map, &nfsd_devid_hash[devid_hashfn(idx)], hash)
|
|
|
|
if (map->idx == idx)
|
|
|
|
ret = map;
|
|
|
|
rcu_read_unlock();
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
nfsd4_set_deviceid(struct nfsd4_deviceid *id, const struct svc_fh *fhp,
|
|
|
|
u32 device_generation)
|
|
|
|
{
|
|
|
|
if (!fhp->fh_export->ex_devid_map) {
|
|
|
|
nfsd4_alloc_devid_map(fhp);
|
|
|
|
if (!fhp->fh_export->ex_devid_map)
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
id->fsid_idx = fhp->fh_export->ex_devid_map->idx;
|
|
|
|
id->generation = device_generation;
|
|
|
|
id->pad = 0;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
void nfsd4_setup_layout_type(struct svc_export *exp)
|
|
|
|
{
|
2015-01-21 10:40:00 +00:00
|
|
|
struct super_block *sb = exp->ex_path.mnt->mnt_sb;
|
|
|
|
|
2015-03-30 16:46:29 +00:00
|
|
|
if (!(exp->ex_flags & NFSEXP_PNFS))
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
return;
|
2015-01-21 10:40:00 +00:00
|
|
|
|
|
|
|
if (sb->s_export_op->get_uuid &&
|
|
|
|
sb->s_export_op->map_blocks &&
|
|
|
|
sb->s_export_op->commit_blocks)
|
|
|
|
exp->ex_layout_type = LAYOUT_BLOCK_VOLUME;
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
nfsd4_free_layout_stateid(struct nfs4_stid *stid)
|
|
|
|
{
|
|
|
|
struct nfs4_layout_stateid *ls = layoutstateid(stid);
|
|
|
|
struct nfs4_client *clp = ls->ls_stid.sc_client;
|
|
|
|
struct nfs4_file *fp = ls->ls_stid.sc_file;
|
|
|
|
|
2014-08-17 00:02:22 +00:00
|
|
|
trace_layoutstate_free(&ls->ls_stid.sc_stateid);
|
|
|
|
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
spin_lock(&clp->cl_lock);
|
|
|
|
list_del_init(&ls->ls_perclnt);
|
|
|
|
spin_unlock(&clp->cl_lock);
|
|
|
|
|
|
|
|
spin_lock(&fp->fi_lock);
|
|
|
|
list_del_init(&ls->ls_perfile);
|
|
|
|
spin_unlock(&fp->fi_lock);
|
|
|
|
|
2014-09-23 10:38:48 +00:00
|
|
|
vfs_setlease(ls->ls_file, F_UNLCK, NULL, (void **)&ls);
|
|
|
|
fput(ls->ls_file);
|
|
|
|
|
|
|
|
if (ls->ls_recalled)
|
|
|
|
atomic_dec(&ls->ls_stid.sc_file->fi_lo_recalls);
|
|
|
|
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
kmem_cache_free(nfs4_layout_stateid_cache, ls);
|
|
|
|
}
|
|
|
|
|
2014-09-23 10:38:48 +00:00
|
|
|
static int
|
|
|
|
nfsd4_layout_setlease(struct nfs4_layout_stateid *ls)
|
|
|
|
{
|
|
|
|
struct file_lock *fl;
|
|
|
|
int status;
|
|
|
|
|
|
|
|
fl = locks_alloc_lock();
|
|
|
|
if (!fl)
|
|
|
|
return -ENOMEM;
|
|
|
|
locks_init_lock(fl);
|
|
|
|
fl->fl_lmops = &nfsd4_layouts_lm_ops;
|
|
|
|
fl->fl_flags = FL_LAYOUT;
|
|
|
|
fl->fl_type = F_RDLCK;
|
|
|
|
fl->fl_end = OFFSET_MAX;
|
|
|
|
fl->fl_owner = ls;
|
|
|
|
fl->fl_pid = current->tgid;
|
|
|
|
fl->fl_file = ls->ls_file;
|
|
|
|
|
|
|
|
status = vfs_setlease(fl->fl_file, fl->fl_type, &fl, NULL);
|
|
|
|
if (status) {
|
|
|
|
locks_free_lock(fl);
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
BUG_ON(fl != NULL);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
static struct nfs4_layout_stateid *
|
|
|
|
nfsd4_alloc_layout_stateid(struct nfsd4_compound_state *cstate,
|
|
|
|
struct nfs4_stid *parent, u32 layout_type)
|
|
|
|
{
|
|
|
|
struct nfs4_client *clp = cstate->clp;
|
|
|
|
struct nfs4_file *fp = parent->sc_file;
|
|
|
|
struct nfs4_layout_stateid *ls;
|
|
|
|
struct nfs4_stid *stp;
|
|
|
|
|
|
|
|
stp = nfs4_alloc_stid(cstate->clp, nfs4_layout_stateid_cache);
|
|
|
|
if (!stp)
|
|
|
|
return NULL;
|
|
|
|
stp->sc_free = nfsd4_free_layout_stateid;
|
|
|
|
get_nfs4_file(fp);
|
|
|
|
stp->sc_file = fp;
|
|
|
|
|
|
|
|
ls = layoutstateid(stp);
|
|
|
|
INIT_LIST_HEAD(&ls->ls_perclnt);
|
|
|
|
INIT_LIST_HEAD(&ls->ls_perfile);
|
|
|
|
spin_lock_init(&ls->ls_lock);
|
|
|
|
INIT_LIST_HEAD(&ls->ls_layouts);
|
2015-09-17 11:58:24 +00:00
|
|
|
mutex_init(&ls->ls_mutex);
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
ls->ls_layout_type = layout_type;
|
2014-09-23 10:38:48 +00:00
|
|
|
nfsd4_init_cb(&ls->ls_recall, clp, &nfsd4_cb_layout_ops,
|
|
|
|
NFSPROC4_CLNT_CB_LAYOUT);
|
|
|
|
|
|
|
|
if (parent->sc_type == NFS4_DELEG_STID)
|
|
|
|
ls->ls_file = get_file(fp->fi_deleg_file);
|
|
|
|
else
|
|
|
|
ls->ls_file = find_any_file(fp);
|
|
|
|
BUG_ON(!ls->ls_file);
|
|
|
|
|
|
|
|
if (nfsd4_layout_setlease(ls)) {
|
2015-07-09 09:38:26 +00:00
|
|
|
fput(ls->ls_file);
|
2014-09-23 10:38:48 +00:00
|
|
|
put_nfs4_file(fp);
|
|
|
|
kmem_cache_free(nfs4_layout_stateid_cache, ls);
|
|
|
|
return NULL;
|
|
|
|
}
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
|
|
|
|
spin_lock(&clp->cl_lock);
|
|
|
|
stp->sc_type = NFS4_LAYOUT_STID;
|
|
|
|
list_add(&ls->ls_perclnt, &clp->cl_lo_states);
|
|
|
|
spin_unlock(&clp->cl_lock);
|
|
|
|
|
|
|
|
spin_lock(&fp->fi_lock);
|
|
|
|
list_add(&ls->ls_perfile, &fp->fi_lo_states);
|
|
|
|
spin_unlock(&fp->fi_lock);
|
|
|
|
|
2014-08-17 00:02:22 +00:00
|
|
|
trace_layoutstate_alloc(&ls->ls_stid.sc_stateid);
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
return ls;
|
|
|
|
}
|
|
|
|
|
|
|
|
__be32
|
|
|
|
nfsd4_preprocess_layout_stateid(struct svc_rqst *rqstp,
|
|
|
|
struct nfsd4_compound_state *cstate, stateid_t *stateid,
|
|
|
|
bool create, u32 layout_type, struct nfs4_layout_stateid **lsp)
|
|
|
|
{
|
|
|
|
struct nfs4_layout_stateid *ls;
|
|
|
|
struct nfs4_stid *stid;
|
|
|
|
unsigned char typemask = NFS4_LAYOUT_STID;
|
|
|
|
__be32 status;
|
|
|
|
|
|
|
|
if (create)
|
|
|
|
typemask |= (NFS4_OPEN_STID | NFS4_LOCK_STID | NFS4_DELEG_STID);
|
|
|
|
|
|
|
|
status = nfsd4_lookup_stateid(cstate, stateid, typemask, &stid,
|
|
|
|
net_generic(SVC_NET(rqstp), nfsd_net_id));
|
|
|
|
if (status)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
if (!fh_match(&cstate->current_fh.fh_handle,
|
|
|
|
&stid->sc_file->fi_fhandle)) {
|
|
|
|
status = nfserr_bad_stateid;
|
|
|
|
goto out_put_stid;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (stid->sc_type != NFS4_LAYOUT_STID) {
|
|
|
|
ls = nfsd4_alloc_layout_stateid(cstate, stid, layout_type);
|
|
|
|
nfs4_put_stid(stid);
|
|
|
|
|
|
|
|
status = nfserr_jukebox;
|
|
|
|
if (!ls)
|
|
|
|
goto out;
|
2015-09-17 11:58:24 +00:00
|
|
|
mutex_lock(&ls->ls_mutex);
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
} else {
|
|
|
|
ls = container_of(stid, struct nfs4_layout_stateid, ls_stid);
|
|
|
|
|
|
|
|
status = nfserr_bad_stateid;
|
2015-09-17 11:58:24 +00:00
|
|
|
mutex_lock(&ls->ls_mutex);
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
if (stateid->si_generation > stid->sc_stateid.si_generation)
|
2015-09-17 11:58:24 +00:00
|
|
|
goto out_unlock_stid;
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
if (layout_type != ls->ls_layout_type)
|
2015-09-17 11:58:24 +00:00
|
|
|
goto out_unlock_stid;
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
*lsp = ls;
|
|
|
|
return 0;
|
|
|
|
|
2015-09-17 11:58:24 +00:00
|
|
|
out_unlock_stid:
|
|
|
|
mutex_unlock(&ls->ls_mutex);
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
out_put_stid:
|
|
|
|
nfs4_put_stid(stid);
|
|
|
|
out:
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
2014-09-23 10:38:48 +00:00
|
|
|
static void
|
|
|
|
nfsd4_recall_file_layout(struct nfs4_layout_stateid *ls)
|
|
|
|
{
|
|
|
|
spin_lock(&ls->ls_lock);
|
|
|
|
if (ls->ls_recalled)
|
|
|
|
goto out_unlock;
|
|
|
|
|
|
|
|
ls->ls_recalled = true;
|
|
|
|
atomic_inc(&ls->ls_stid.sc_file->fi_lo_recalls);
|
|
|
|
if (list_empty(&ls->ls_layouts))
|
|
|
|
goto out_unlock;
|
|
|
|
|
2014-08-17 00:02:22 +00:00
|
|
|
trace_layout_recall(&ls->ls_stid.sc_stateid);
|
|
|
|
|
2014-09-23 10:38:48 +00:00
|
|
|
atomic_inc(&ls->ls_stid.sc_count);
|
|
|
|
nfsd4_run_cb(&ls->ls_recall);
|
|
|
|
|
|
|
|
out_unlock:
|
|
|
|
spin_unlock(&ls->ls_lock);
|
|
|
|
}
|
|
|
|
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
static inline u64
|
|
|
|
layout_end(struct nfsd4_layout_seg *seg)
|
|
|
|
{
|
|
|
|
u64 end = seg->offset + seg->length;
|
|
|
|
return end >= seg->offset ? end : NFS4_MAX_UINT64;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
layout_update_len(struct nfsd4_layout_seg *lo, u64 end)
|
|
|
|
{
|
|
|
|
if (end == NFS4_MAX_UINT64)
|
|
|
|
lo->length = NFS4_MAX_UINT64;
|
|
|
|
else
|
|
|
|
lo->length = end - lo->offset;
|
|
|
|
}
|
|
|
|
|
|
|
|
static bool
|
|
|
|
layouts_overlapping(struct nfs4_layout *lo, struct nfsd4_layout_seg *s)
|
|
|
|
{
|
|
|
|
if (s->iomode != IOMODE_ANY && s->iomode != lo->lo_seg.iomode)
|
|
|
|
return false;
|
|
|
|
if (layout_end(&lo->lo_seg) <= s->offset)
|
|
|
|
return false;
|
|
|
|
if (layout_end(s) <= lo->lo_seg.offset)
|
|
|
|
return false;
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
static bool
|
|
|
|
layouts_try_merge(struct nfsd4_layout_seg *lo, struct nfsd4_layout_seg *new)
|
|
|
|
{
|
|
|
|
if (lo->iomode != new->iomode)
|
|
|
|
return false;
|
|
|
|
if (layout_end(new) < lo->offset)
|
|
|
|
return false;
|
|
|
|
if (layout_end(lo) < new->offset)
|
|
|
|
return false;
|
|
|
|
|
|
|
|
lo->offset = min(lo->offset, new->offset);
|
|
|
|
layout_update_len(lo, max(layout_end(lo), layout_end(new)));
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
2014-09-23 10:38:48 +00:00
|
|
|
static __be32
|
|
|
|
nfsd4_recall_conflict(struct nfs4_layout_stateid *ls)
|
|
|
|
{
|
|
|
|
struct nfs4_file *fp = ls->ls_stid.sc_file;
|
|
|
|
struct nfs4_layout_stateid *l, *n;
|
|
|
|
__be32 nfserr = nfs_ok;
|
|
|
|
|
|
|
|
assert_spin_locked(&fp->fi_lock);
|
|
|
|
|
|
|
|
list_for_each_entry_safe(l, n, &fp->fi_lo_states, ls_perfile) {
|
|
|
|
if (l != ls) {
|
|
|
|
nfsd4_recall_file_layout(l);
|
|
|
|
nfserr = nfserr_recallconflict;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return nfserr;
|
|
|
|
}
|
|
|
|
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
__be32
|
|
|
|
nfsd4_insert_layout(struct nfsd4_layoutget *lgp, struct nfs4_layout_stateid *ls)
|
|
|
|
{
|
|
|
|
struct nfsd4_layout_seg *seg = &lgp->lg_seg;
|
2014-09-23 10:38:48 +00:00
|
|
|
struct nfs4_file *fp = ls->ls_stid.sc_file;
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
struct nfs4_layout *lp, *new = NULL;
|
2014-09-23 10:38:48 +00:00
|
|
|
__be32 nfserr;
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
|
2014-09-23 10:38:48 +00:00
|
|
|
spin_lock(&fp->fi_lock);
|
|
|
|
nfserr = nfsd4_recall_conflict(ls);
|
|
|
|
if (nfserr)
|
|
|
|
goto out;
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
spin_lock(&ls->ls_lock);
|
|
|
|
list_for_each_entry(lp, &ls->ls_layouts, lo_perstate) {
|
|
|
|
if (layouts_try_merge(&lp->lo_seg, seg))
|
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
spin_unlock(&ls->ls_lock);
|
2014-09-23 10:38:48 +00:00
|
|
|
spin_unlock(&fp->fi_lock);
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
|
|
|
|
new = kmem_cache_alloc(nfs4_layout_cache, GFP_KERNEL);
|
|
|
|
if (!new)
|
|
|
|
return nfserr_jukebox;
|
|
|
|
memcpy(&new->lo_seg, seg, sizeof(lp->lo_seg));
|
|
|
|
new->lo_state = ls;
|
|
|
|
|
2014-09-23 10:38:48 +00:00
|
|
|
spin_lock(&fp->fi_lock);
|
|
|
|
nfserr = nfsd4_recall_conflict(ls);
|
|
|
|
if (nfserr)
|
|
|
|
goto out;
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
spin_lock(&ls->ls_lock);
|
|
|
|
list_for_each_entry(lp, &ls->ls_layouts, lo_perstate) {
|
|
|
|
if (layouts_try_merge(&lp->lo_seg, seg))
|
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
|
|
|
atomic_inc(&ls->ls_stid.sc_count);
|
|
|
|
list_add_tail(&new->lo_perstate, &ls->ls_layouts);
|
|
|
|
new = NULL;
|
|
|
|
done:
|
2015-10-01 13:05:50 +00:00
|
|
|
nfs4_inc_and_copy_stateid(&lgp->lg_sid, &ls->ls_stid);
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
spin_unlock(&ls->ls_lock);
|
2014-09-23 10:38:48 +00:00
|
|
|
out:
|
|
|
|
spin_unlock(&fp->fi_lock);
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
if (new)
|
|
|
|
kmem_cache_free(nfs4_layout_cache, new);
|
2014-09-23 10:38:48 +00:00
|
|
|
return nfserr;
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
nfsd4_free_layouts(struct list_head *reaplist)
|
|
|
|
{
|
|
|
|
while (!list_empty(reaplist)) {
|
|
|
|
struct nfs4_layout *lp = list_first_entry(reaplist,
|
|
|
|
struct nfs4_layout, lo_perstate);
|
|
|
|
|
|
|
|
list_del(&lp->lo_perstate);
|
|
|
|
nfs4_put_stid(&lp->lo_state->ls_stid);
|
|
|
|
kmem_cache_free(nfs4_layout_cache, lp);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
nfsd4_return_file_layout(struct nfs4_layout *lp, struct nfsd4_layout_seg *seg,
|
|
|
|
struct list_head *reaplist)
|
|
|
|
{
|
|
|
|
struct nfsd4_layout_seg *lo = &lp->lo_seg;
|
|
|
|
u64 end = layout_end(lo);
|
|
|
|
|
|
|
|
if (seg->offset <= lo->offset) {
|
|
|
|
if (layout_end(seg) >= end) {
|
|
|
|
list_move_tail(&lp->lo_perstate, reaplist);
|
|
|
|
return;
|
|
|
|
}
|
2015-03-22 14:17:20 +00:00
|
|
|
lo->offset = layout_end(seg);
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
} else {
|
|
|
|
/* retain the whole layout segment on a split. */
|
|
|
|
if (layout_end(seg) < end) {
|
|
|
|
dprintk("%s: split not supported\n", __func__);
|
|
|
|
return;
|
|
|
|
}
|
2015-03-22 14:17:20 +00:00
|
|
|
end = seg->offset;
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
layout_update_len(lo, end);
|
|
|
|
}
|
|
|
|
|
|
|
|
__be32
|
|
|
|
nfsd4_return_file_layouts(struct svc_rqst *rqstp,
|
|
|
|
struct nfsd4_compound_state *cstate,
|
|
|
|
struct nfsd4_layoutreturn *lrp)
|
|
|
|
{
|
|
|
|
struct nfs4_layout_stateid *ls;
|
|
|
|
struct nfs4_layout *lp, *n;
|
|
|
|
LIST_HEAD(reaplist);
|
|
|
|
__be32 nfserr;
|
|
|
|
int found = 0;
|
|
|
|
|
|
|
|
nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lrp->lr_sid,
|
|
|
|
false, lrp->lr_layout_type,
|
|
|
|
&ls);
|
2014-08-17 00:02:22 +00:00
|
|
|
if (nfserr) {
|
|
|
|
trace_layout_return_lookup_fail(&lrp->lr_sid);
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
return nfserr;
|
2014-08-17 00:02:22 +00:00
|
|
|
}
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
|
|
|
|
spin_lock(&ls->ls_lock);
|
|
|
|
list_for_each_entry_safe(lp, n, &ls->ls_layouts, lo_perstate) {
|
|
|
|
if (layouts_overlapping(lp, &lrp->lr_seg)) {
|
|
|
|
nfsd4_return_file_layout(lp, &lrp->lr_seg, &reaplist);
|
|
|
|
found++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (!list_empty(&ls->ls_layouts)) {
|
2015-10-01 13:05:50 +00:00
|
|
|
if (found)
|
|
|
|
nfs4_inc_and_copy_stateid(&lrp->lr_sid, &ls->ls_stid);
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
lrp->lrs_present = 1;
|
|
|
|
} else {
|
2014-08-17 00:02:22 +00:00
|
|
|
trace_layoutstate_unhash(&ls->ls_stid.sc_stateid);
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
nfs4_unhash_stid(&ls->ls_stid);
|
|
|
|
lrp->lrs_present = 0;
|
|
|
|
}
|
|
|
|
spin_unlock(&ls->ls_lock);
|
|
|
|
|
2015-09-17 11:58:24 +00:00
|
|
|
mutex_unlock(&ls->ls_mutex);
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
nfs4_put_stid(&ls->ls_stid);
|
|
|
|
nfsd4_free_layouts(&reaplist);
|
|
|
|
return nfs_ok;
|
|
|
|
}
|
|
|
|
|
|
|
|
__be32
|
|
|
|
nfsd4_return_client_layouts(struct svc_rqst *rqstp,
|
|
|
|
struct nfsd4_compound_state *cstate,
|
|
|
|
struct nfsd4_layoutreturn *lrp)
|
|
|
|
{
|
|
|
|
struct nfs4_layout_stateid *ls, *n;
|
|
|
|
struct nfs4_client *clp = cstate->clp;
|
|
|
|
struct nfs4_layout *lp, *t;
|
|
|
|
LIST_HEAD(reaplist);
|
|
|
|
|
|
|
|
lrp->lrs_present = 0;
|
|
|
|
|
|
|
|
spin_lock(&clp->cl_lock);
|
|
|
|
list_for_each_entry_safe(ls, n, &clp->cl_lo_states, ls_perclnt) {
|
2015-03-19 11:04:14 +00:00
|
|
|
if (ls->ls_layout_type != lrp->lr_layout_type)
|
|
|
|
continue;
|
|
|
|
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
if (lrp->lr_return_type == RETURN_FSID &&
|
|
|
|
!fh_fsid_match(&ls->ls_stid.sc_file->fi_fhandle,
|
|
|
|
&cstate->current_fh.fh_handle))
|
|
|
|
continue;
|
|
|
|
|
|
|
|
spin_lock(&ls->ls_lock);
|
|
|
|
list_for_each_entry_safe(lp, t, &ls->ls_layouts, lo_perstate) {
|
|
|
|
if (lrp->lr_seg.iomode == IOMODE_ANY ||
|
|
|
|
lrp->lr_seg.iomode == lp->lo_seg.iomode)
|
|
|
|
list_move_tail(&lp->lo_perstate, &reaplist);
|
|
|
|
}
|
|
|
|
spin_unlock(&ls->ls_lock);
|
|
|
|
}
|
|
|
|
spin_unlock(&clp->cl_lock);
|
|
|
|
|
|
|
|
nfsd4_free_layouts(&reaplist);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
nfsd4_return_all_layouts(struct nfs4_layout_stateid *ls,
|
|
|
|
struct list_head *reaplist)
|
|
|
|
{
|
|
|
|
spin_lock(&ls->ls_lock);
|
|
|
|
list_splice_init(&ls->ls_layouts, reaplist);
|
|
|
|
spin_unlock(&ls->ls_lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
nfsd4_return_all_client_layouts(struct nfs4_client *clp)
|
|
|
|
{
|
|
|
|
struct nfs4_layout_stateid *ls, *n;
|
|
|
|
LIST_HEAD(reaplist);
|
|
|
|
|
|
|
|
spin_lock(&clp->cl_lock);
|
|
|
|
list_for_each_entry_safe(ls, n, &clp->cl_lo_states, ls_perclnt)
|
|
|
|
nfsd4_return_all_layouts(ls, &reaplist);
|
|
|
|
spin_unlock(&clp->cl_lock);
|
|
|
|
|
|
|
|
nfsd4_free_layouts(&reaplist);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
nfsd4_return_all_file_layouts(struct nfs4_client *clp, struct nfs4_file *fp)
|
|
|
|
{
|
|
|
|
struct nfs4_layout_stateid *ls, *n;
|
|
|
|
LIST_HEAD(reaplist);
|
|
|
|
|
|
|
|
spin_lock(&fp->fi_lock);
|
|
|
|
list_for_each_entry_safe(ls, n, &fp->fi_lo_states, ls_perfile) {
|
|
|
|
if (ls->ls_stid.sc_client == clp)
|
|
|
|
nfsd4_return_all_layouts(ls, &reaplist);
|
|
|
|
}
|
|
|
|
spin_unlock(&fp->fi_lock);
|
|
|
|
|
|
|
|
nfsd4_free_layouts(&reaplist);
|
|
|
|
}
|
|
|
|
|
2014-09-23 10:38:48 +00:00
|
|
|
static void
|
|
|
|
nfsd4_cb_layout_fail(struct nfs4_layout_stateid *ls)
|
|
|
|
{
|
|
|
|
struct nfs4_client *clp = ls->ls_stid.sc_client;
|
|
|
|
char addr_str[INET6_ADDRSTRLEN];
|
|
|
|
static char *envp[] = {
|
|
|
|
"HOME=/",
|
|
|
|
"TERM=linux",
|
|
|
|
"PATH=/sbin:/usr/sbin:/bin:/usr/bin",
|
|
|
|
NULL
|
|
|
|
};
|
|
|
|
char *argv[8];
|
|
|
|
int error;
|
|
|
|
|
|
|
|
rpc_ntop((struct sockaddr *)&clp->cl_addr, addr_str, sizeof(addr_str));
|
|
|
|
|
2015-03-20 07:56:40 +00:00
|
|
|
trace_layout_recall_fail(&ls->ls_stid.sc_stateid);
|
|
|
|
|
2014-09-23 10:38:48 +00:00
|
|
|
printk(KERN_WARNING
|
|
|
|
"nfsd: client %s failed to respond to layout recall. "
|
|
|
|
" Fencing..\n", addr_str);
|
|
|
|
|
|
|
|
argv[0] = "/sbin/nfsd-recall-failed";
|
|
|
|
argv[1] = addr_str;
|
|
|
|
argv[2] = ls->ls_file->f_path.mnt->mnt_sb->s_id;
|
|
|
|
argv[3] = NULL;
|
|
|
|
|
|
|
|
error = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC);
|
|
|
|
if (error) {
|
|
|
|
printk(KERN_ERR "nfsd: fence failed for client %s: %d!\n",
|
|
|
|
addr_str, error);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-09-17 11:58:24 +00:00
|
|
|
static void
|
|
|
|
nfsd4_cb_layout_prepare(struct nfsd4_callback *cb)
|
|
|
|
{
|
|
|
|
struct nfs4_layout_stateid *ls =
|
|
|
|
container_of(cb, struct nfs4_layout_stateid, ls_recall);
|
|
|
|
|
|
|
|
mutex_lock(&ls->ls_mutex);
|
2015-10-01 13:05:50 +00:00
|
|
|
nfs4_inc_and_copy_stateid(&ls->ls_recall_sid, &ls->ls_stid);
|
2015-09-17 11:58:24 +00:00
|
|
|
}
|
|
|
|
|
2014-09-23 10:38:48 +00:00
|
|
|
static int
|
|
|
|
nfsd4_cb_layout_done(struct nfsd4_callback *cb, struct rpc_task *task)
|
|
|
|
{
|
|
|
|
struct nfs4_layout_stateid *ls =
|
|
|
|
container_of(cb, struct nfs4_layout_stateid, ls_recall);
|
|
|
|
LIST_HEAD(reaplist);
|
|
|
|
|
|
|
|
switch (task->tk_status) {
|
|
|
|
case 0:
|
|
|
|
return 1;
|
|
|
|
case -NFS4ERR_NOMATCHING_LAYOUT:
|
2014-08-17 00:02:22 +00:00
|
|
|
trace_layout_recall_done(&ls->ls_stid.sc_stateid);
|
2014-09-23 10:38:48 +00:00
|
|
|
task->tk_status = 0;
|
|
|
|
return 1;
|
|
|
|
case -NFS4ERR_DELAY:
|
|
|
|
/* Poll the client until it's done with the layout */
|
|
|
|
/* FIXME: cap number of retries.
|
|
|
|
* The pnfs standard states that we need to only expire
|
|
|
|
* the client after at-least "lease time" .eg lease-time * 2
|
|
|
|
* when failing to communicate a recall
|
|
|
|
*/
|
|
|
|
rpc_delay(task, HZ/100); /* 10 mili-seconds */
|
|
|
|
return 0;
|
|
|
|
default:
|
|
|
|
/*
|
|
|
|
* Unknown error or non-responding client, we'll need to fence.
|
|
|
|
*/
|
|
|
|
nfsd4_cb_layout_fail(ls);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
nfsd4_cb_layout_release(struct nfsd4_callback *cb)
|
|
|
|
{
|
|
|
|
struct nfs4_layout_stateid *ls =
|
|
|
|
container_of(cb, struct nfs4_layout_stateid, ls_recall);
|
|
|
|
LIST_HEAD(reaplist);
|
|
|
|
|
2014-08-17 00:02:22 +00:00
|
|
|
trace_layout_recall_release(&ls->ls_stid.sc_stateid);
|
|
|
|
|
2015-09-17 11:58:24 +00:00
|
|
|
mutex_unlock(&ls->ls_mutex);
|
2014-09-23 10:38:48 +00:00
|
|
|
nfsd4_return_all_layouts(ls, &reaplist);
|
|
|
|
nfsd4_free_layouts(&reaplist);
|
|
|
|
nfs4_put_stid(&ls->ls_stid);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct nfsd4_callback_ops nfsd4_cb_layout_ops = {
|
2015-09-17 11:58:24 +00:00
|
|
|
.prepare = nfsd4_cb_layout_prepare,
|
2014-09-23 10:38:48 +00:00
|
|
|
.done = nfsd4_cb_layout_done,
|
|
|
|
.release = nfsd4_cb_layout_release,
|
|
|
|
};
|
|
|
|
|
|
|
|
static bool
|
|
|
|
nfsd4_layout_lm_break(struct file_lock *fl)
|
|
|
|
{
|
|
|
|
/*
|
|
|
|
* We don't want the locks code to timeout the lease for us;
|
|
|
|
* we'll remove it ourself if a layout isn't returned
|
|
|
|
* in time:
|
|
|
|
*/
|
|
|
|
fl->fl_break_time = 0;
|
|
|
|
nfsd4_recall_file_layout(fl->fl_owner);
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
nfsd4_layout_lm_change(struct file_lock *onlist, int arg,
|
|
|
|
struct list_head *dispose)
|
|
|
|
{
|
|
|
|
BUG_ON(!(arg & F_UNLCK));
|
|
|
|
return lease_modify(onlist, arg, dispose);
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct lock_manager_operations nfsd4_layouts_lm_ops = {
|
|
|
|
.lm_break = nfsd4_layout_lm_break,
|
|
|
|
.lm_change = nfsd4_layout_lm_change,
|
|
|
|
};
|
|
|
|
|
nfsd: implement pNFS operations
Add support for the GETDEVICEINFO, LAYOUTGET, LAYOUTCOMMIT and
LAYOUTRETURN NFSv4.1 operations, as well as backing code to manage
outstanding layouts and devices.
Layout management is very straight forward, with a nfs4_layout_stateid
structure that extends nfs4_stid to manage layout stateids as the
top-level structure. It is linked into the nfs4_file and nfs4_client
structures like the other stateids, and contains a linked list of
layouts that hang of the stateid. The actual layout operations are
implemented in layout drivers that are not part of this commit, but
will be added later.
The worst part of this commit is the management of the pNFS device IDs,
which suffers from a specification that is not sanely implementable due
to the fact that the device-IDs are global and not bound to an export,
and have a small enough size so that we can't store the fsid portion of
a file handle, and must never be reused. As we still do need perform all
export authentication and validation checks on a device ID passed to
GETDEVICEINFO we are caught between a rock and a hard place. To work
around this issue we add a new hash that maps from a 64-bit integer to a
fsid so that we can look up the export to authenticate against it,
a 32-bit integer as a generation that we can bump when changing the device,
and a currently unused 32-bit integer that could be used in the future
to handle more than a single device per export. Entries in this hash
table are never deleted as we can't reuse the ids anyway, and would have
a severe lifetime problem anyway as Linux export structures are temporary
structures that can go away under load.
Parts of the XDR data, structures and marshaling/unmarshaling code, as
well as many concepts are derived from the old pNFS server implementation
from Andy Adamson, Benny Halevy, Dean Hildebrand, Marc Eshel, Fred Isaman,
Mike Sager, Ricardo Labiaga and many others.
Signed-off-by: Christoph Hellwig <hch@lst.de>
2014-05-05 11:11:59 +00:00
|
|
|
int
|
|
|
|
nfsd4_init_pnfs(void)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < DEVID_HASH_SIZE; i++)
|
|
|
|
INIT_LIST_HEAD(&nfsd_devid_hash[i]);
|
|
|
|
|
|
|
|
nfs4_layout_cache = kmem_cache_create("nfs4_layout",
|
|
|
|
sizeof(struct nfs4_layout), 0, 0, NULL);
|
|
|
|
if (!nfs4_layout_cache)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
nfs4_layout_stateid_cache = kmem_cache_create("nfs4_layout_stateid",
|
|
|
|
sizeof(struct nfs4_layout_stateid), 0, 0, NULL);
|
|
|
|
if (!nfs4_layout_stateid_cache) {
|
|
|
|
kmem_cache_destroy(nfs4_layout_cache);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
nfsd4_exit_pnfs(void)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
kmem_cache_destroy(nfs4_layout_cache);
|
|
|
|
kmem_cache_destroy(nfs4_layout_stateid_cache);
|
|
|
|
|
|
|
|
for (i = 0; i < DEVID_HASH_SIZE; i++) {
|
|
|
|
struct nfsd4_deviceid_map *map, *n;
|
|
|
|
|
|
|
|
list_for_each_entry_safe(map, n, &nfsd_devid_hash[i], hash)
|
|
|
|
kfree(map);
|
|
|
|
}
|
|
|
|
}
|