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-rw-r--r--fs/afs/Makefile4
-rw-r--r--fs/afs/addr_list.c2
-rw-r--r--fs/afs/callback.c110
-rw-r--r--fs/afs/cell.c24
-rw-r--r--fs/afs/cmservice.c2
-rw-r--r--fs/afs/dynroot.c126
-rw-r--r--fs/afs/fsclient.c100
-rw-r--r--fs/afs/internal.h75
-rw-r--r--fs/afs/main.c35
-rw-r--r--fs/afs/netdevices.c6
-rw-r--r--fs/afs/proc.c793
-rw-r--r--fs/afs/rxrpc.c2
-rw-r--r--fs/afs/server.c2
-rw-r--r--fs/afs/super.c68
-rw-r--r--fs/namei.c29
-rw-r--r--fs/proc/generic.c26
-rw-r--r--fs/proc/inode.c5
-rw-r--r--fs/proc/internal.h20
-rw-r--r--fs/proc/proc_net.c92
-rw-r--r--fs/proc/root.c3
-rw-r--r--include/linux/namei.h1
-rw-r--r--include/linux/proc_fs.h12
22 files changed, 892 insertions, 645 deletions
diff --git a/fs/afs/Makefile b/fs/afs/Makefile
index 532acae25453..546874057bd3 100644
--- a/fs/afs/Makefile
+++ b/fs/afs/Makefile
@@ -5,7 +5,7 @@
afs-cache-$(CONFIG_AFS_FSCACHE) := cache.o
-kafs-objs := \
+kafs-y := \
$(afs-cache-y) \
addr_list.o \
callback.o \
@@ -21,7 +21,6 @@ kafs-objs := \
main.o \
misc.o \
mntpt.o \
- proc.o \
rotate.o \
rxrpc.o \
security.o \
@@ -34,4 +33,5 @@ kafs-objs := \
write.o \
xattr.o
+kafs-$(CONFIG_PROC_FS) += proc.o
obj-$(CONFIG_AFS_FS) := kafs.o
diff --git a/fs/afs/addr_list.c b/fs/afs/addr_list.c
index 2c46c46f3a6d..025a9a5e1c32 100644
--- a/fs/afs/addr_list.c
+++ b/fs/afs/addr_list.c
@@ -215,7 +215,7 @@ struct afs_addr_list *afs_dns_query(struct afs_cell *cell, time64_t *_expiry)
_enter("%s", cell->name);
ret = dns_query("afsdb", cell->name, cell->name_len,
- "ipv4", &vllist, _expiry);
+ "", &vllist, _expiry);
if (ret < 0)
return ERR_PTR(ret);
diff --git a/fs/afs/callback.c b/fs/afs/callback.c
index 571437dcb252..5f261fbf2182 100644
--- a/fs/afs/callback.c
+++ b/fs/afs/callback.c
@@ -21,6 +21,66 @@
#include "internal.h"
/*
+ * Create volume and callback interests on a server.
+ */
+static struct afs_cb_interest *afs_create_interest(struct afs_server *server,
+ struct afs_vnode *vnode)
+{
+ struct afs_vol_interest *new_vi, *vi;
+ struct afs_cb_interest *new;
+ struct hlist_node **pp;
+
+ new_vi = kzalloc(sizeof(struct afs_vol_interest), GFP_KERNEL);
+ if (!new_vi)
+ return NULL;
+
+ new = kzalloc(sizeof(struct afs_cb_interest), GFP_KERNEL);
+ if (!new) {
+ kfree(new_vi);
+ return NULL;
+ }
+
+ new_vi->usage = 1;
+ new_vi->vid = vnode->volume->vid;
+ INIT_HLIST_NODE(&new_vi->srv_link);
+ INIT_HLIST_HEAD(&new_vi->cb_interests);
+
+ refcount_set(&new->usage, 1);
+ new->sb = vnode->vfs_inode.i_sb;
+ new->vid = vnode->volume->vid;
+ new->server = afs_get_server(server);
+ INIT_HLIST_NODE(&new->cb_vlink);
+
+ write_lock(&server->cb_break_lock);
+
+ for (pp = &server->cb_volumes.first; *pp; pp = &(*pp)->next) {
+ vi = hlist_entry(*pp, struct afs_vol_interest, srv_link);
+ if (vi->vid < new_vi->vid)
+ continue;
+ if (vi->vid > new_vi->vid)
+ break;
+ vi->usage++;
+ goto found_vi;
+ }
+
+ new_vi->srv_link.pprev = pp;
+ new_vi->srv_link.next = *pp;
+ if (*pp)
+ (*pp)->pprev = &new_vi->srv_link.next;
+ *pp = &new_vi->srv_link;
+ vi = new_vi;
+ new_vi = NULL;
+found_vi:
+
+ new->vol_interest = vi;
+ hlist_add_head(&new->cb_vlink, &vi->cb_interests);
+
+ write_unlock(&server->cb_break_lock);
+ kfree(new_vi);
+ return new;
+}
+
+/*
* Set up an interest-in-callbacks record for a volume on a server and
* register it with the server.
* - Called with vnode->io_lock held.
@@ -77,20 +137,10 @@ again:
}
if (!cbi) {
- new = kzalloc(sizeof(struct afs_cb_interest), GFP_KERNEL);
+ new = afs_create_interest(server, vnode);
if (!new)
return -ENOMEM;
- refcount_set(&new->usage, 1);
- new->sb = vnode->vfs_inode.i_sb;
- new->vid = vnode->volume->vid;
- new->server = afs_get_server(server);
- INIT_LIST_HEAD(&new->cb_link);
-
- write_lock(&server->cb_break_lock);
- list_add_tail(&new->cb_link, &server->cb_interests);
- write_unlock(&server->cb_break_lock);
-
write_lock(&slist->lock);
if (!entry->cb_interest) {
entry->cb_interest = afs_get_cb_interest(new);
@@ -126,11 +176,22 @@ again:
*/
void afs_put_cb_interest(struct afs_net *net, struct afs_cb_interest *cbi)
{
+ struct afs_vol_interest *vi;
+
if (cbi && refcount_dec_and_test(&cbi->usage)) {
- if (!list_empty(&cbi->cb_link)) {
+ if (!hlist_unhashed(&cbi->cb_vlink)) {
write_lock(&cbi->server->cb_break_lock);
- list_del_init(&cbi->cb_link);
+
+ hlist_del_init(&cbi->cb_vlink);
+ vi = cbi->vol_interest;
+ cbi->vol_interest = NULL;
+ if (--vi->usage == 0)
+ hlist_del(&vi->srv_link);
+ else
+ vi = NULL;
+
write_unlock(&cbi->server->cb_break_lock);
+ kfree(vi);
afs_put_server(net, cbi->server);
}
kfree(cbi);
@@ -182,20 +243,34 @@ void afs_break_callback(struct afs_vnode *vnode)
static void afs_break_one_callback(struct afs_server *server,
struct afs_fid *fid)
{
+ struct afs_vol_interest *vi;
struct afs_cb_interest *cbi;
struct afs_iget_data data;
struct afs_vnode *vnode;
struct inode *inode;
read_lock(&server->cb_break_lock);
+ hlist_for_each_entry(vi, &server->cb_volumes, srv_link) {
+ if (vi->vid < fid->vid)
+ continue;
+ if (vi->vid > fid->vid) {
+ vi = NULL;
+ break;
+ }
+ //atomic_inc(&vi->usage);
+ break;
+ }
+
+ /* TODO: Find all matching volumes if we couldn't match the server and
+ * break them anyway.
+ */
+ if (!vi)
+ goto out;
/* Step through all interested superblocks. There may be more than one
* because of cell aliasing.
*/
- list_for_each_entry(cbi, &server->cb_interests, cb_link) {
- if (cbi->vid != fid->vid)
- continue;
-
+ hlist_for_each_entry(cbi, &vi->cb_interests, cb_vlink) {
if (fid->vnode == 0 && fid->unique == 0) {
/* The callback break applies to an entire volume. */
struct afs_super_info *as = AFS_FS_S(cbi->sb);
@@ -217,6 +292,7 @@ static void afs_break_one_callback(struct afs_server *server,
}
}
+out:
read_unlock(&server->cb_break_lock);
}
diff --git a/fs/afs/cell.c b/fs/afs/cell.c
index fdf4c36cff79..f3d0bef16d78 100644
--- a/fs/afs/cell.c
+++ b/fs/afs/cell.c
@@ -15,6 +15,7 @@
#include <linux/dns_resolver.h>
#include <linux/sched.h>
#include <linux/inet.h>
+#include <linux/namei.h>
#include <keys/rxrpc-type.h>
#include "internal.h"
@@ -341,8 +342,8 @@ int afs_cell_init(struct afs_net *net, const char *rootcell)
/* install the new cell */
write_seqlock(&net->cells_lock);
- old_root = net->ws_cell;
- net->ws_cell = new_root;
+ old_root = rcu_access_pointer(net->ws_cell);
+ rcu_assign_pointer(net->ws_cell, new_root);
write_sequnlock(&net->cells_lock);
afs_put_cell(net, old_root);
@@ -528,12 +529,14 @@ static int afs_activate_cell(struct afs_net *net, struct afs_cell *cell)
NULL, 0,
cell, 0, true);
#endif
- ret = afs_proc_cell_setup(net, cell);
+ ret = afs_proc_cell_setup(cell);
if (ret < 0)
return ret;
- spin_lock(&net->proc_cells_lock);
+
+ mutex_lock(&net->proc_cells_lock);
list_add_tail(&cell->proc_link, &net->proc_cells);
- spin_unlock(&net->proc_cells_lock);
+ afs_dynroot_mkdir(net, cell);
+ mutex_unlock(&net->proc_cells_lock);
return 0;
}
@@ -544,11 +547,12 @@ static void afs_deactivate_cell(struct afs_net *net, struct afs_cell *cell)
{
_enter("%s", cell->name);
- afs_proc_cell_remove(net, cell);
+ afs_proc_cell_remove(cell);
- spin_lock(&net->proc_cells_lock);
+ mutex_lock(&net->proc_cells_lock);
list_del_init(&cell->proc_link);
- spin_unlock(&net->proc_cells_lock);
+ afs_dynroot_rmdir(net, cell);
+ mutex_unlock(&net->proc_cells_lock);
#ifdef CONFIG_AFS_FSCACHE
fscache_relinquish_cookie(cell->cache, NULL, false);
@@ -755,8 +759,8 @@ void afs_cell_purge(struct afs_net *net)
_enter("");
write_seqlock(&net->cells_lock);
- ws = net->ws_cell;
- net->ws_cell = NULL;
+ ws = rcu_access_pointer(net->ws_cell);
+ RCU_INIT_POINTER(net->ws_cell, NULL);
write_sequnlock(&net->cells_lock);
afs_put_cell(net, ws);
diff --git a/fs/afs/cmservice.c b/fs/afs/cmservice.c
index 238fd28cfdd2..9e51d6fe7e8f 100644
--- a/fs/afs/cmservice.c
+++ b/fs/afs/cmservice.c
@@ -526,7 +526,7 @@ static void SRXAFSCB_TellMeAboutYourself(struct work_struct *work)
nifs = 0;
ifs = kcalloc(32, sizeof(*ifs), GFP_KERNEL);
if (ifs) {
- nifs = afs_get_ipv4_interfaces(ifs, 32, false);
+ nifs = afs_get_ipv4_interfaces(call->net, ifs, 32, false);
if (nifs < 0) {
kfree(ifs);
ifs = NULL;
diff --git a/fs/afs/dynroot.c b/fs/afs/dynroot.c
index 983f3946ab57..174e843f0633 100644
--- a/fs/afs/dynroot.c
+++ b/fs/afs/dynroot.c
@@ -1,4 +1,4 @@
-/* dir.c: AFS dynamic root handling
+/* AFS dynamic root handling
*
* Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
@@ -46,7 +46,7 @@ static int afs_probe_cell_name(struct dentry *dentry)
return 0;
}
- ret = dns_query("afsdb", name, len, "ipv4", NULL, NULL);
+ ret = dns_query("afsdb", name, len, "", NULL, NULL);
if (ret == -ENODATA)
ret = -EDESTADDRREQ;
return ret;
@@ -207,3 +207,125 @@ const struct dentry_operations afs_dynroot_dentry_operations = {
.d_release = afs_d_release,
.d_automount = afs_d_automount,
};
+
+/*
+ * Create a manually added cell mount directory.
+ * - The caller must hold net->proc_cells_lock
+ */
+int afs_dynroot_mkdir(struct afs_net *net, struct afs_cell *cell)
+{
+ struct super_block *sb = net->dynroot_sb;
+ struct dentry *root, *subdir;
+ int ret;
+
+ if (!sb || atomic_read(&sb->s_active) == 0)
+ return 0;
+
+ /* Let the ->lookup op do the creation */
+ root = sb->s_root;
+ inode_lock(root->d_inode);
+ subdir = lookup_one_len(cell->name, root, cell->name_len);
+ if (IS_ERR(subdir)) {
+ ret = PTR_ERR(subdir);
+ goto unlock;
+ }
+
+ /* Note that we're retaining an extra ref on the dentry */
+ subdir->d_fsdata = (void *)1UL;
+ ret = 0;
+unlock:
+ inode_unlock(root->d_inode);
+ return ret;
+}
+
+/*
+ * Remove a manually added cell mount directory.
+ * - The caller must hold net->proc_cells_lock
+ */
+void afs_dynroot_rmdir(struct afs_net *net, struct afs_cell *cell)
+{
+ struct super_block *sb = net->dynroot_sb;
+ struct dentry *root, *subdir;
+
+ if (!sb || atomic_read(&sb->s_active) == 0)
+ return;
+
+ root = sb->s_root;
+ inode_lock(root->d_inode);
+
+ /* Don't want to trigger a lookup call, which will re-add the cell */
+ subdir = try_lookup_one_len(cell->name, root, cell->name_len);
+ if (IS_ERR_OR_NULL(subdir)) {
+ _debug("lookup %ld", PTR_ERR(subdir));
+ goto no_dentry;
+ }
+
+ _debug("rmdir %pd %u", subdir, d_count(subdir));
+
+ if (subdir->d_fsdata) {
+ _debug("unpin %u", d_count(subdir));
+ subdir->d_fsdata = NULL;
+ dput(subdir);
+ }
+ dput(subdir);
+no_dentry:
+ inode_unlock(root->d_inode);
+ _leave("");
+}
+
+/*
+ * Populate a newly created dynamic root with cell names.
+ */
+int afs_dynroot_populate(struct super_block *sb)
+{
+ struct afs_cell *cell;
+ struct afs_net *net = afs_sb2net(sb);
+ int ret;
+
+ if (mutex_lock_interruptible(&net->proc_cells_lock) < 0)
+ return -ERESTARTSYS;
+
+ net->dynroot_sb = sb;
+ list_for_each_entry(cell, &net->proc_cells, proc_link) {
+ ret = afs_dynroot_mkdir(net, cell);
+ if (ret < 0)
+ goto error;
+ }
+
+ ret = 0;
+out:
+ mutex_unlock(&net->proc_cells_lock);
+ return ret;
+
+error:
+ net->dynroot_sb = NULL;
+ goto out;
+}
+
+/*
+ * When a dynamic root that's in the process of being destroyed, depopulate it
+ * of pinned directories.
+ */
+void afs_dynroot_depopulate(struct super_block *sb)
+{
+ struct afs_net *net = afs_sb2net(sb);
+ struct dentry *root = sb->s_root, *subdir, *tmp;
+
+ /* Prevent more subdirs from being created */
+ mutex_lock(&net->proc_cells_lock);
+ if (net->dynroot_sb == sb)
+ net->dynroot_sb = NULL;
+ mutex_unlock(&net->proc_cells_lock);
+
+ inode_lock(root->d_inode);
+
+ /* Remove all the pins for dirs created for manually added cells */
+ list_for_each_entry_safe(subdir, tmp, &root->d_subdirs, d_child) {
+ if (subdir->d_fsdata) {
+ subdir->d_fsdata = NULL;
+ dput(subdir);
+ }
+ }
+
+ inode_unlock(root->d_inode);
+}
diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c
index 5907601aafd0..50929cb91732 100644
--- a/fs/afs/fsclient.c
+++ b/fs/afs/fsclient.c
@@ -138,10 +138,6 @@ static int xdr_decode_AFSFetchStatus(struct afs_call *call,
u64 data_version, size;
u32 type, abort_code;
u8 flags = 0;
- int ret;
-
- if (vnode)
- write_seqlock(&vnode->cb_lock);
abort_code = ntohl(xdr->abort_code);
@@ -154,8 +150,7 @@ static int xdr_decode_AFSFetchStatus(struct afs_call *call,
* case.
*/
status->abort_code = abort_code;
- ret = 0;
- goto out;
+ return 0;
}
pr_warn("Unknown AFSFetchStatus version %u\n", ntohl(xdr->if_version));
@@ -164,8 +159,7 @@ static int xdr_decode_AFSFetchStatus(struct afs_call *call,
if (abort_code != 0 && inline_error) {
status->abort_code = abort_code;
- ret = 0;
- goto out;
+ return 0;
}
type = ntohl(xdr->type);
@@ -235,17 +229,35 @@ static int xdr_decode_AFSFetchStatus(struct afs_call *call,
flags);
}
- ret = 0;
-
-out:
- if (vnode)
- write_sequnlock(&vnode->cb_lock);
- return ret;
+ return 0;
bad:
xdr_dump_bad(*_bp);
- ret = afs_protocol_error(call, -EBADMSG);
- goto out;
+ return afs_protocol_error(call, -EBADMSG);
+}
+
+/*
+ * Decode the file status. We need to lock the target vnode if we're going to
+ * update its status so that stat() sees the attributes update atomically.
+ */
+static int afs_decode_status(struct afs_call *call,
+ const __be32 **_bp,
+ struct afs_file_status *status,
+ struct afs_vnode *vnode,
+ const afs_dataversion_t *expected_version,
+ struct afs_read *read_req)
+{
+ int ret;
+
+ if (!vnode)
+ return xdr_decode_AFSFetchStatus(call, _bp, status, vnode,
+ expected_version, read_req);
+
+ write_seqlock(&vnode->cb_lock);
+ ret = xdr_decode_AFSFetchStatus(call, _bp, status, vnode,
+ expected_version, read_req);
+ write_sequnlock(&vnode->cb_lock);
+ return ret;
}
/*
@@ -387,8 +399,8 @@ static int afs_deliver_fs_fetch_status_vnode(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
- if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
- &call->expected_version, NULL) < 0)
+ if (afs_decode_status(call, &bp, &vnode->status, vnode,
+ &call->expected_version, NULL) < 0)
return afs_protocol_error(call, -EBADMSG);
xdr_decode_AFSCallBack(call, vnode, &bp);
if (call->reply[1])
@@ -568,8 +580,8 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call)
return ret;
bp = call->buffer;
- if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
- &vnode->status.data_version, req) < 0)
+ if (afs_decode_status(call, &bp, &vnode->status, vnode,
+ &vnode->status.data_version, req) < 0)
return afs_protocol_error(call, -EBADMSG);
xdr_decode_AFSCallBack(call, vnode, &bp);
if (call->reply[1])
@@ -721,9 +733,9 @@ static int afs_deliver_fs_create_vnode(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
xdr_decode_AFSFid(&bp, call->reply[1]);
- if (xdr_decode_AFSFetchStatus(call, &bp, call->reply[2], NULL, NULL, NULL) < 0 ||
- xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
- &call->expected_version, NULL) < 0)
+ if (afs_decode_status(call, &bp, call->reply[2], NULL, NULL, NULL) < 0 ||
+ afs_decode_status(call, &bp, &vnode->status, vnode,
+ &call->expected_version, NULL) < 0)
return afs_protocol_error(call, -EBADMSG);
xdr_decode_AFSCallBack_raw(&bp, call->reply[3]);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
@@ -827,8 +839,8 @@ static int afs_deliver_fs_remove(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
- if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
- &call->expected_version, NULL) < 0)
+ if (afs_decode_status(call, &bp, &vnode->status, vnode,
+ &call->expected_version, NULL) < 0)
return afs_protocol_error(call, -EBADMSG);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
@@ -917,9 +929,9 @@ static int afs_deliver_fs_link(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
- if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode, NULL, NULL) < 0 ||
- xdr_decode_AFSFetchStatus(call, &bp, &dvnode->status, dvnode,
- &call->expected_version, NULL) < 0)
+ if (afs_decode_status(call, &bp, &vnode->status, vnode, NULL, NULL) < 0 ||
+ afs_decode_status(call, &bp, &dvnode->status, dvnode,
+ &call->expected_version, NULL) < 0)
return afs_protocol_error(call, -EBADMSG);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
@@ -1004,9 +1016,9 @@ static int afs_deliver_fs_symlink(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
xdr_decode_AFSFid(&bp, call->reply[1]);
- if (xdr_decode_AFSFetchStatus(call, &bp, call->reply[2], NULL, NULL, NULL) ||
- xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
- &call->expected_version, NULL) < 0)
+ if (afs_decode_status(call, &bp, call->reply[2], NULL, NULL, NULL) ||
+ afs_decode_status(call, &bp, &vnode->status, vnode,
+ &call->expected_version, NULL) < 0)
return afs_protocol_error(call, -EBADMSG);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
@@ -1110,12 +1122,12 @@ static int afs_deliver_fs_rename(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
- if (xdr_decode_AFSFetchStatus(call, &bp, &orig_dvnode->status, orig_dvnode,
- &call->expected_version, NULL) < 0)
+ if (afs_decode_status(call, &bp, &orig_dvnode->status, orig_dvnode,
+ &call->expected_version, NULL) < 0)
return afs_protocol_error(call, -EBADMSG);
if (new_dvnode != orig_dvnode &&
- xdr_decode_AFSFetchStatus(call, &bp, &new_dvnode->status, new_dvnode,
- &call->expected_version_2, NULL) < 0)
+ afs_decode_status(call, &bp, &new_dvnode->status, new_dvnode,
+ &call->expected_version_2, NULL) < 0)
return afs_protocol_error(call, -EBADMSG);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
@@ -1219,8 +1231,8 @@ static int afs_deliver_fs_store_data(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
- if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
- &call->expected_version, NULL) < 0)
+ if (afs_decode_status(call, &bp, &vnode->status, vnode,
+ &call->expected_version, NULL) < 0)
return afs_protocol_error(call, -EBADMSG);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
@@ -1395,8 +1407,8 @@ static int afs_deliver_fs_store_status(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
- if (xdr_decode_AFSFetchStatus(call, &bp, &vnode->status, vnode,
- &call->expected_version, NULL) < 0)
+ if (afs_decode_status(call, &bp, &vnode->status, vnode,
+ &call->expected_version, NULL) < 0)
return afs_protocol_error(call, -EBADMSG);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
@@ -2097,8 +2109,8 @@ static int afs_deliver_fs_fetch_status(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
- xdr_decode_AFSFetchStatus(call, &bp, status, vnode,
- &call->expected_version, NULL);
+ afs_decode_status(call, &bp, status, vnode,
+ &call->expected_version, NULL);
callback[call->count].version = ntohl(bp[0]);
callback[call->count].expiry = ntohl(bp[1]);
callback[call->count].type = ntohl(bp[2]);
@@ -2209,9 +2221,9 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
bp = call->buffer;
statuses = call->reply[1];
- if (xdr_decode_AFSFetchStatus(call, &bp, &statuses[call->count],
- call->count == 0 ? vnode : NULL,
- NULL, NULL) < 0)
+ if (afs_decode_status(call, &bp, &statuses[call->count],
+ call->count == 0 ? vnode : NULL,
+ NULL, NULL) < 0)
return afs_protocol_error(call, -EBADMSG);
call->count++;
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index e3f8a46663db..9778df135717 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -22,6 +22,8 @@
#include <linux/backing-dev.h>
#include <linux/uuid.h>
#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+#include <net/sock.h>
#include <net/af_rxrpc.h>
#include "afs.h"
@@ -40,7 +42,8 @@ struct afs_mount_params {
afs_voltype_t type; /* type of volume requested */
int volnamesz; /* size of volume name */
const char *volname; /* name of volume to mount */
- struct afs_net *net; /* Network namespace in effect */
+ struct net *net_ns; /* Network namespace in effect */
+ struct afs_net *net; /* the AFS net namespace stuff */
struct afs_cell *cell; /* cell in which to find volume */
struct afs_volume *volume; /* volume record */
struct key *key; /* key to use for secure mounting */
@@ -189,7 +192,7 @@ struct afs_read {
* - there's one superblock per volume
*/
struct afs_super_info {
- struct afs_net *net; /* Network namespace */
+ struct net *net_ns; /* Network namespace */
struct afs_cell *cell; /* The cell in which the volume resides */
struct afs_volume *volume; /* volume record */
bool dyn_root; /* True if dynamic root */
@@ -210,7 +213,6 @@ struct afs_sysnames {
char *subs[AFS_NR_SYSNAME];
refcount_t usage;
unsigned short nr;
- short error;
char blank[1];
};
@@ -218,6 +220,7 @@ struct afs_sysnames {
* AFS network namespace record.
*/
struct afs_net {
+ struct net *net; /* Backpointer to the owning net namespace */
struct afs_uuid uuid;
bool live; /* F if this namespace is being removed */
@@ -231,13 +234,13 @@ struct afs_net {
/* Cell database */
struct rb_root cells;
- struct afs_cell *ws_cell;
+ struct afs_cell __rcu *ws_cell;
struct work_struct cells_manager;
struct timer_list cells_timer;
atomic_t cells_outstanding;
seqlock_t cells_lock;
- spinlock_t proc_cells_lock;
+ struct mutex proc_cells_lock;
struct list_head proc_cells;
/* Known servers. Theoretically each fileserver can only be in one
@@ -261,6 +264,7 @@ struct afs_net {
struct mutex lock_manager_mutex;
/* Misc */
+ struct super_block *dynroot_sb; /* Dynamic root mount superblock */
struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */
struct afs_sysnames *sysnames;
rwlock_t sysnames_lock;
@@ -280,7 +284,6 @@ struct afs_net {
};
extern const char afs_init_sysname[];
-extern struct afs_net __afs_net;// Dummy AFS network namespace; TODO: replace with real netns
enum afs_cell_state {
AFS_CELL_UNSET,
@@ -404,16 +407,27 @@ struct afs_server {
rwlock_t fs_lock; /* access lock */
/* callback promise management */
- struct list_head cb_interests; /* List of superblocks using this server */
+ struct hlist_head cb_volumes; /* List of volume interests on this server */
unsigned cb_s_break; /* Break-everything counter. */
rwlock_t cb_break_lock; /* Volume finding lock */
};
/*
+ * Volume collation in the server's callback interest list.
+ */
+struct afs_vol_interest {
+ struct hlist_node srv_link; /* Link in server->cb_volumes */
+ struct hlist_head cb_interests; /* List of callback interests on the server */
+ afs_volid_t vid; /* Volume ID to match */
+ unsigned int usage;
+};
+
+/*
* Interest by a superblock on a server.
*/
struct afs_cb_interest {
- struct list_head cb_link; /* Link in server->cb_interests */
+ struct hlist_node cb_vlink; /* Link in vol_interest->cb_interests */
+ struct afs_vol_interest *vol_interest;
struct afs_server *server; /* Server on which this interest resides */
struct super_block *sb; /* Superblock on which inodes reside */
afs_volid_t vid; /* Volume ID to match */
@@ -720,6 +734,10 @@ extern const struct inode_operations afs_dynroot_inode_operations;
extern const struct dentry_operations afs_dynroot_dentry_operations;
extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *);
+extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *);
+extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *);
+extern int afs_dynroot_populate(struct super_block *);
+extern void afs_dynroot_depopulate(struct super_block *);
/*
* file.c
@@ -806,34 +824,36 @@ extern int afs_drop_inode(struct inode *);
* main.c
*/
extern struct workqueue_struct *afs_wq;
+extern int afs_net_id;
-static inline struct afs_net *afs_d2net(struct dentry *dentry)
+static inline struct afs_net *afs_net(struct net *net)
{
- return &__afs_net;
+ return net_generic(net, afs_net_id);
}
-static inline struct afs_net *afs_i2net(struct inode *inode)
+static inline struct afs_net *afs_sb2net(struct super_block *sb)
{
- return &__afs_net;
+ return afs_net(AFS_FS_S(sb)->net_ns);
}
-static inline struct afs_net *afs_v2net(struct afs_vnode *vnode)
+static inline struct afs_net *afs_d2net(struct dentry *dentry)
{
- return &__afs_net;
+ return afs_sb2net(dentry->d_sb);
}
-static inline struct afs_net *afs_sock2net(struct sock *sk)
+static inline struct afs_net *afs_i2net(struct inode *inode)
{
- return &__afs_net;
+ return afs_sb2net(inode->i_sb);
}
-static inline struct afs_net *afs_get_net(struct afs_net *net)
+static inline struct afs_net *afs_v2net(struct afs_vnode *vnode)
{
- return net;
+ return afs_i2net(&vnode->vfs_inode);
}
-static inline void afs_put_net(struct afs_net *net)
+static inline struct afs_net *afs_sock2net(struct sock *sk)
{
+ return net_generic(sock_net(sk), afs_net_id);
}
static inline void __afs_stat(atomic_t *s)
@@ -861,16 +881,25 @@ extern void afs_mntpt_kill_timer(void);
/*
* netdevices.c
*/
-extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool);
+extern int afs_get_ipv4_interfaces(struct afs_net *, struct afs_interface *,
+ size_t, bool);
/*
* proc.c
*/
+#ifdef CONFIG_PROC_FS
extern int __net_init afs_proc_init(struct afs_net *);
extern void __net_exit afs_proc_cleanup(struct afs_net *);
-extern int afs_proc_cell_setup(struct afs_net *, struct afs_cell *);
-extern void afs_proc_cell_remove(struct afs_net *, struct afs_cell *);
+extern int afs_proc_cell_setup(struct afs_cell *);
+extern void afs_proc_cell_remove(struct afs_cell *);
extern void afs_put_sysnames(struct afs_sysnames *);
+#else
+static inline int afs_proc_init(struct afs_net *net) { return 0; }
+static inline void afs_proc_cleanup(struct afs_net *net) {}
+static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; }
+static inline void afs_proc_cell_remove(struct afs_cell *cell) {}
+static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {}
+#endif
/*
* rotate.c
@@ -1002,7 +1031,7 @@ extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server
* super.c
*/
extern int __init afs_fs_init(void);
-extern void __exit afs_fs_exit(void);
+extern void afs_fs_exit(void);
/*
* vlclient.c
diff --git a/fs/afs/main.c b/fs/afs/main.c
index d7560168b3bf..e84fe822a960 100644
--- a/fs/afs/main.c
+++ b/fs/afs/main.c
@@ -15,6 +15,7 @@
#include <linux/completion.h>
#include <linux/sched.h>
#include <linux/random.h>
+#include <linux/proc_fs.h>
#define CREATE_TRACE_POINTS
#include "internal.h"
@@ -32,7 +33,7 @@ module_param(rootcell, charp, 0);
MODULE_PARM_DESC(rootcell, "root AFS cell name and VL server IP addr list");
struct workqueue_struct *afs_wq;
-struct afs_net __afs_net;
+static struct proc_dir_entry *afs_proc_symlink;
#if defined(CONFIG_ALPHA)
const char afs_init_sysname[] = "alpha_linux26";
@@ -67,11 +68,13 @@ const char afs_init_sysname[] = "unknown_linux26";
/*
* Initialise an AFS network namespace record.
*/
-static int __net_init afs_net_init(struct afs_net *net)
+static int __net_init afs_net_init(struct net *net_ns)
{
struct afs_sysnames *sysnames;
+ struct afs_net *net = afs_net(net_ns);
int ret;
+ net->net = net_ns;
net->live = true;
generate_random_uuid((unsigned char *)&net->uuid);
@@ -83,7 +86,7 @@ static int __net_init afs_net_init(struct afs_net *net)
INIT_WORK(&net->cells_manager, afs_manage_cells);
timer_setup(&net->cells_timer, afs_cells_timer, 0);
- spin_lock_init(&net->proc_cells_lock);
+ mutex_init(&net->proc_cells_lock);
INIT_LIST_HEAD(&net->proc_cells);
seqlock_init(&net->fs_lock);
@@ -142,8 +145,10 @@ error_sysnames:
/*
* Clean up and destroy an AFS network namespace record.
*/
-static void __net_exit afs_net_exit(struct afs_net *net)
+static void __net_exit afs_net_exit(struct net *net_ns)
{
+ struct afs_net *net = afs_net(net_ns);
+
net->live = false;
afs_cell_purge(net);
afs_purge_servers(net);
@@ -152,6 +157,13 @@ static void __net_exit afs_net_exit(struct afs_net *net)
afs_put_sysnames(net->sysnames);
}
+static struct pernet_operations afs_net_ops = {
+ .init = afs_net_init,
+ .exit = afs_net_exit,
+ .id = &afs_net_id,
+ .size = sizeof(struct afs_net),
+};
+
/*
* initialise the AFS client FS module
*/
@@ -178,7 +190,7 @@ static int __init afs_init(void)
goto error_cache;
#endif
- ret = afs_net_init(&__afs_net);
+ ret = register_pernet_subsys(&afs_net_ops);
if (ret < 0)
goto error_net;
@@ -187,10 +199,18 @@ static int __init afs_init(void)
if (ret < 0)
goto error_fs;
+ afs_proc_symlink = proc_symlink("fs/afs", NULL, "../self/net/afs");
+ if (IS_ERR(afs_proc_symlink)) {
+ ret = PTR_ERR(afs_proc_symlink);
+ goto error_proc;
+ }
+
return ret;
+error_proc:
+ afs_fs_exit();
error_fs:
- afs_net_exit(&__afs_net);
+ unregister_pernet_subsys(&afs_net_ops);
error_net:
#ifdef CONFIG_AFS_FSCACHE
fscache_unregister_netfs(&afs_cache_netfs);
@@ -219,8 +239,9 @@ static void __exit afs_exit(void)
{
printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n");
+ proc_remove(afs_proc_symlink);
afs_fs_exit();
- afs_net_exit(&__afs_net);
+ unregister_pernet_subsys(&afs_net_ops);
#ifdef CONFIG_AFS_FSCACHE
fscache_unregister_netfs(&afs_cache_netfs);
#endif
diff --git a/fs/afs/netdevices.c b/fs/afs/netdevices.c
index 50bd5bb1c4fb..2a009d1939d7 100644
--- a/fs/afs/netdevices.c
+++ b/fs/afs/netdevices.c
@@ -17,8 +17,8 @@
* - maxbufs must be at least 1
* - returns the number of interface records in the buffer
*/
-int afs_get_ipv4_interfaces(struct afs_interface *bufs, size_t maxbufs,
- bool wantloopback)
+int afs_get_ipv4_interfaces(struct afs_net *net, struct afs_interface *bufs,
+ size_t maxbufs, bool wantloopback)
{
struct net_device *dev;
struct in_device *idev;
@@ -27,7 +27,7 @@ int afs_get_ipv4_interfaces(struct afs_interface *bufs, size_t maxbufs,
ASSERT(maxbufs > 0);
rtnl_lock();
- for_each_netdev(&init_net, dev) {
+ for_each_netdev(net->net, dev) {
if (dev->type == ARPHRD_LOOPBACK && !wantloopback)
continue;
idev = __in_dev_get_rtnl(dev);
diff --git a/fs/afs/proc.c b/fs/afs/proc.c
index 3aad32762989..0c3285c8db95 100644
--- a/fs/afs/proc.c
+++ b/fs/afs/proc.c
@@ -17,240 +17,78 @@
#include <linux/uaccess.h>
#include "internal.h"
-static inline struct afs_net *afs_proc2net(struct file *f)
+static inline struct afs_net *afs_seq2net(struct seq_file *m)
{
- return &__afs_net;
+ return afs_net(seq_file_net(m));
}
-static inline struct afs_net *afs_seq2net(struct seq_file *m)
+static inline struct afs_net *afs_seq2net_single(struct seq_file *m)
{
- return &__afs_net; // TODO: use seq_file_net(m)
+ return afs_net(seq_file_single_net(m));
}
-static int afs_proc_cells_open(struct inode *inode, struct file *file);
-static void *afs_proc_cells_start(struct seq_file *p, loff_t *pos);
-static void *afs_proc_cells_next(struct seq_file *p, void *v, loff_t *pos);
-static void afs_proc_cells_stop(struct seq_file *p, void *v);
-static int afs_proc_cells_show(struct seq_file *m, void *v);
-static ssize_t afs_proc_cells_write(struct file *file, const char __user *buf,
- size_t size, loff_t *_pos);
-
-static const struct seq_operations afs_proc_cells_ops = {
- .start = afs_proc_cells_start,
- .next = afs_proc_cells_next,
- .stop = afs_proc_cells_stop,
- .show = afs_proc_cells_show,
-};
-
-static const struct file_operations afs_proc_cells_fops = {
- .open = afs_proc_cells_open,
- .read = seq_read,
- .write = afs_proc_cells_write,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-
-static ssize_t afs_proc_rootcell_read(struct file *file, char __user *buf,
- size_t size, loff_t *_pos);
-static ssize_t afs_proc_rootcell_write(struct file *file,
- const char __user *buf,
- size_t size, loff_t *_pos);
-
-static const struct file_operations afs_proc_rootcell_fops = {
- .read = afs_proc_rootcell_read,
- .write = afs_proc_rootcell_write,
- .llseek = no_llseek,
-};
-
-static void *afs_proc_cell_volumes_start(struct seq_file *p, loff_t *pos);
-static void *afs_proc_cell_volumes_next(struct seq_file *p, void *v,
- loff_t *pos);
-static void afs_proc_cell_volumes_stop(struct seq_file *p, void *v);
-static int afs_proc_cell_volumes_show(struct seq_file *m, void *v);
-
-static const struct seq_operations afs_proc_cell_volumes_ops = {
- .start = afs_proc_cell_volumes_start,
- .next = afs_proc_cell_volumes_next,
- .stop = afs_proc_cell_volumes_stop,
- .show = afs_proc_cell_volumes_show,
-};
-
-static void *afs_proc_cell_vlservers_start(struct seq_file *p, loff_t *pos);
-static void *afs_proc_cell_vlservers_next(struct seq_file *p, void *v,
- loff_t *pos);
-static void afs_proc_cell_vlservers_stop(struct seq_file *p, void *v);
-static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v);
-
-static const struct seq_operations afs_proc_cell_vlservers_ops = {
- .start = afs_proc_cell_vlservers_start,
- .next = afs_proc_cell_vlservers_next,
- .stop = afs_proc_cell_vlservers_stop,
- .show = afs_proc_cell_vlservers_show,
-};
-
-static void *afs_proc_servers_start(struct seq_file *p, loff_t *pos);
-static void *afs_proc_servers_next(struct seq_file *p, void *v,
- loff_t *pos);
-static void afs_proc_servers_stop(struct seq_file *p, void *v);
-static int afs_proc_servers_show(struct seq_file *m, void *v);
-
-static const struct seq_operations afs_proc_servers_ops = {
- .start = afs_proc_servers_start,
- .next = afs_proc_servers_next,
- .stop = afs_proc_servers_stop,
- .show = afs_proc_servers_show,
-};
-
-static int afs_proc_sysname_open(struct inode *inode, struct file *file);
-static int afs_proc_sysname_release(struct inode *inode, struct file *file);
-static void *afs_proc_sysname_start(struct seq_file *p, loff_t *pos);
-static void *afs_proc_sysname_next(struct seq_file *p, void *v,
- loff_t *pos);
-static void afs_proc_sysname_stop(struct seq_file *p, void *v);
-static int afs_proc_sysname_show(struct seq_file *m, void *v);
-static ssize_t afs_proc_sysname_write(struct file *file,
- const char __user *buf,
- size_t size, loff_t *_pos);
-
-static const struct seq_operations afs_proc_sysname_ops = {
- .start = afs_proc_sysname_start,
- .next = afs_proc_sysname_next,
- .stop = afs_proc_sysname_stop,
- .show = afs_proc_sysname_show,
-};
-
-static const struct file_operations afs_proc_sysname_fops = {
- .open = afs_proc_sysname_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = afs_proc_sysname_release,
- .write = afs_proc_sysname_write,
-};
-
-static int afs_proc_stats_show(struct seq_file *m, void *v);
-
/*
- * initialise the /proc/fs/afs/ directory
+ * Display the list of cells known to the namespace.
*/
-int afs_proc_init(struct afs_net *net)
+static int afs_proc_cells_show(struct seq_file *m, void *v)
{
- _enter("");
-
- net->proc_afs = proc_mkdir("fs/afs", NULL);
- if (!net->proc_afs)
- goto error_dir;
+ struct afs_cell *cell = list_entry(v, struct afs_cell, proc_link);
+ struct afs_net *net = afs_seq2net(m);
- if (!proc_create("cells", 0644, net->proc_afs, &afs_proc_cells_fops) ||
- !proc_create("rootcell", 0644, net->proc_afs, &afs_proc_rootcell_fops) ||
- !proc_create_seq("servers", 0644, net->proc_afs, &afs_proc_servers_ops) ||
- !proc_create_single("stats", 0644, net->proc_afs, afs_proc_stats_show) ||
- !proc_create("sysname", 0644, net->proc_afs, &afs_proc_sysname_fops))
- goto error_tree;
+ if (v == &net->proc_cells) {
+ /* display header on line 1 */
+ seq_puts(m, "USE NAME\n");
+ return 0;
+ }
- _leave(" = 0");
+ /* display one cell per line on subsequent lines */
+ seq_printf(m, "%3u %s\n", atomic_read(&cell->usage), cell->name);
return 0;
-
-error_tree:
- proc_remove(net->proc_afs);
-error_dir:
- _leave(" = -ENOMEM");
- return -ENOMEM;
-}
-
-/*
- * clean up the /proc/fs/afs/ directory
- */
-void afs_proc_cleanup(struct afs_net *net)
-{
- proc_remove(net->proc_afs);
- net->proc_afs = NULL;
-}
-
-/*
- * open "/proc/fs/afs/cells" which provides a summary of extant cells
- */
-static int afs_proc_cells_open(struct inode *inode, struct file *file)
-{
- return seq_open(file, &afs_proc_cells_ops);
}
-/*
- * set up the iterator to start reading from the cells list and return the
- * first item
- */
static void *afs_proc_cells_start(struct seq_file *m, loff_t *_pos)
__acquires(rcu)
{
- struct afs_net *net = afs_seq2net(m);
-
rcu_read_lock();
- return seq_list_start_head(&net->proc_cells, *_pos);
+ return seq_list_start_head(&afs_seq2net(m)->proc_cells, *_pos);
}
-/*
- * move to next cell in cells list
- */
static void *afs_proc_cells_next(struct seq_file *m, void *v, loff_t *pos)
{
- struct afs_net *net = afs_seq2net(m);
-
- return seq_list_next(v, &net->proc_cells, pos);
+ return seq_list_next(v, &afs_seq2net(m)->proc_cells, pos);
}
-/*
- * clean up after reading from the cells list
- */
static void afs_proc_cells_stop(struct seq_file *m, void *v)
__releases(rcu)
{
rcu_read_unlock();
}
-/*
- * display a header line followed by a load of cell lines
- */
-static int afs_proc_cells_show(struct seq_file *m, void *v)
-{
- struct afs_cell *cell = list_entry(v, struct afs_cell, proc_link);
- struct afs_net *net = afs_seq2net(m);
-
- if (v == &net->proc_cells) {
- /* display header on line 1 */
- seq_puts(m, "USE NAME\n");
- return 0;
- }
-
- /* display one cell per line on subsequent lines */
- seq_printf(m, "%3u %s\n", atomic_read(&cell->usage), cell->name);
- return 0;
-}
+static const struct seq_operations afs_proc_cells_ops = {
+ .start = afs_proc_cells_start,
+ .next = afs_proc_cells_next,
+ .stop = afs_proc_cells_stop,
+ .show = afs_proc_cells_show,
+};
/*
* handle writes to /proc/fs/afs/cells
* - to add cells: echo "add <cellname> <IP>[:<IP>][:<IP>]"
*/
-static ssize_t afs_proc_cells_write(struct file *file, const char __user *buf,
- size_t size, loff_t *_pos)
+static int afs_proc_cells_write(struct file *file, char *buf, size_t size)
{
- struct afs_net *net = afs_proc2net(file);
- char *kbuf, *name, *args;
+ struct seq_file *m = file->private_data;
+ struct afs_net *net = afs_seq2net(m);
+ char *name, *args;
int ret;
- /* start by dragging the command into memory */
- if (size <= 1 || size >= PAGE_SIZE)
- return -EINVAL;
-
- kbuf = memdup_user_nul(buf, size);
- if (IS_ERR(kbuf))
- return PTR_ERR(kbuf);
-
/* trim to first NL */
- name = memchr(kbuf, '\n', size);
+ name = memchr(buf, '\n', size);
if (name)
*name = 0;
/* split into command, name and argslist */
- name = strchr(kbuf, ' ');
+ name = strchr(buf, ' ');
if (!name)
goto inval;
do {
@@ -269,9 +107,9 @@ static ssize_t afs_proc_cells_write(struct file *file, const char __user *buf,
goto inval;
/* determine command to perform */
- _debug("cmd=%s name=%s args=%s", kbuf, name, args);
+ _debug("cmd=%s name=%s args=%s", buf, name, args);
- if (strcmp(kbuf, "add") == 0) {
+ if (strcmp(buf, "add") == 0) {
struct afs_cell *cell;
cell = afs_lookup_cell(net, name, strlen(name), args, true);
@@ -287,10 +125,9 @@ static ssize_t afs_proc_cells_write(struct file *file, const char __user *buf,
goto inval;
}
- ret = size;
+ ret = 0;
done:
- kfree(kbuf);
_leave(" = %d", ret);
return ret;
@@ -300,200 +137,136 @@ inval:
goto done;
}
-static ssize_t afs_proc_rootcell_read(struct file *file, char __user *buf,
- size_t size, loff_t *_pos)
+/*
+ * Display the name of the current workstation cell.
+ */
+static int afs_proc_rootcell_show(struct seq_file *m, void *v)
{
struct afs_cell *cell;
- struct afs_net *net = afs_proc2net(file);
- unsigned int seq = 0;
- char name[AFS_MAXCELLNAME + 1];
- int len;
-
- if (*_pos > 0)
- return 0;
- if (!net->ws_cell)
- return 0;
-
- rcu_read_lock();
- do {
- read_seqbegin_or_lock(&net->cells_lock, &seq);
- len = 0;
- cell = rcu_dereference_raw(net->ws_cell);
- if (cell) {
- len = cell->name_len;
- memcpy(name, cell->name, len);
- }
- } while (need_seqretry(&net->cells_lock, seq));
- done_seqretry(&net->cells_lock, seq);
- rcu_read_unlock();
-
- if (!len)
- return 0;
-
- name[len++] = '\n';
- if (len > size)
- len = size;
- if (copy_to_user(buf, name, len) != 0)
- return -EFAULT;
- *_pos = 1;
- return len;
+ struct afs_net *net;
+
+ net = afs_seq2net_single(m);
+ if (rcu_access_pointer(net->ws_cell)) {
+ rcu_read_lock();
+ cell = rcu_dereference(net->ws_cell);
+ if (cell)
+ seq_printf(m, "%s\n", cell->name);
+ rcu_read_unlock();
+ }
+ return 0;
}
/*
- * handle writes to /proc/fs/afs/rootcell
- * - to initialize rootcell: echo "cell.name:192.168.231.14"
+ * Set the current workstation cell and optionally supply its list of volume
+ * location servers.
+ *
+ * echo "cell.name:192.168.231.14" >/proc/fs/afs/rootcell
*/
-static ssize_t afs_proc_rootcell_write(struct file *file,
- const char __user *buf,
- size_t size, loff_t *_pos)
+static int afs_proc_rootcell_write(struct file *file, char *buf, size_t size)
{
- struct afs_net *net = afs_proc2net(file);
- char *kbuf, *s;
+ struct seq_file *m = file->private_data;
+ struct afs_net *net = afs_seq2net_single(m);
+ char *s;
int ret;
- /* start by dragging the command into memory */
- if (size <= 1 || size >= PAGE_SIZE)
- return -EINVAL;
-
- kbuf = memdup_user_nul(buf, size);
- if (IS_ERR(kbuf))
- return PTR_ERR(kbuf);
-
ret = -EINVAL;
- if (kbuf[0] == '.')
+ if (buf[0] == '.')
goto out;
- if (memchr(kbuf, '/', size))
+ if (memchr(buf, '/', size))
goto out;
/* trim to first NL */
- s = memchr(kbuf, '\n', size);
+ s = memchr(buf, '\n', size);
if (s)
*s = 0;
/* determine command to perform */
- _debug("rootcell=%s", kbuf);
+ _debug("rootcell=%s", buf);
- ret = afs_cell_init(net, kbuf);
- if (ret >= 0)
- ret = size; /* consume everything, always */
+ ret = afs_cell_init(net, buf);
out:
- kfree(kbuf);
_leave(" = %d", ret);
return ret;
}
+static const char afs_vol_types[3][3] = {
+ [AFSVL_RWVOL] = "RW",
+ [AFSVL_ROVOL] = "RO",
+ [AFSVL_BACKVOL] = "BK",
+};
+
/*
- * initialise /proc/fs/afs/<cell>/
+ * Display the list of volumes known to a cell.
*/
-int afs_proc_cell_setup(struct afs_net *net, struct afs_cell *cell)
+static int afs_proc_cell_volumes_show(struct seq_file *m, void *v)
{
- struct proc_dir_entry *dir;
-
- _enter("%p{%s},%p", cell, cell->name, net->proc_afs);
+ struct afs_cell *cell = PDE_DATA(file_inode(m->file));
+ struct afs_volume *vol = list_entry(v, struct afs_volume, proc_link);
- dir = proc_mkdir(cell->name, net->proc_afs);
- if (!dir)
- goto error_dir;
+ /* Display header on line 1 */
+ if (v == &cell->proc_volumes) {
+ seq_puts(m, "USE VID TY\n");
+ return 0;
+ }
- if (!proc_create_seq_data("vlservers", 0, dir,
- &afs_proc_cell_vlservers_ops, cell))
- goto error_tree;
- if (!proc_create_seq_data("volumes", 0, dir, &afs_proc_cell_volumes_ops,
- cell))
- goto error_tree;
+ seq_printf(m, "%3d %08x %s\n",
+ atomic_read(&vol->usage), vol->vid,
+ afs_vol_types[vol->type]);
- _leave(" = 0");
return 0;
-
-error_tree:
- remove_proc_subtree(cell->name, net->proc_afs);
-error_dir:
- _leave(" = -ENOMEM");
- return -ENOMEM;
}
-/*
- * remove /proc/fs/afs/<cell>/
- */
-void afs_proc_cell_remove(struct afs_net *net, struct afs_cell *cell)
-{
- _enter("");
-
- remove_proc_subtree(cell->name, net->proc_afs);
-
- _leave("");
-}
-
-/*
- * set up the iterator to start reading from the cells list and return the
- * first item
- */
static void *afs_proc_cell_volumes_start(struct seq_file *m, loff_t *_pos)
__acquires(cell->proc_lock)
{
struct afs_cell *cell = PDE_DATA(file_inode(m->file));
- _enter("cell=%p pos=%Ld", cell, *_pos);
-
read_lock(&cell->proc_lock);
return seq_list_start_head(&cell->proc_volumes, *_pos);
}
-/*
- * move to next cell in cells list
- */
-static void *afs_proc_cell_volumes_next(struct seq_file *p, void *v,
+static void *afs_proc_cell_volumes_next(struct seq_file *m, void *v,
loff_t *_pos)
{
- struct afs_cell *cell = PDE_DATA(file_inode(p->file));
+ struct afs_cell *cell = PDE_DATA(file_inode(m->file));
- _enter("cell=%p pos=%Ld", cell, *_pos);
return seq_list_next(v, &cell->proc_volumes, _pos);
}
-/*
- * clean up after reading from the cells list
- */
-static void afs_proc_cell_volumes_stop(struct seq_file *p, void *v)
+static void afs_proc_cell_volumes_stop(struct seq_file *m, void *v)
__releases(cell->proc_lock)
{
- struct afs_cell *cell = PDE_DATA(file_inode(p->file));
+ struct afs_cell *cell = PDE_DATA(file_inode(m->file));
read_unlock(&cell->proc_lock);
}
-static const char afs_vol_types[3][3] = {
- [AFSVL_RWVOL] = "RW",
- [AFSVL_ROVOL] = "RO",
- [AFSVL_BACKVOL] = "BK",
+static const struct seq_operations afs_proc_cell_volumes_ops = {
+ .start = afs_proc_cell_volumes_start,
+ .next = afs_proc_cell_volumes_next,
+ .stop = afs_proc_cell_volumes_stop,
+ .show = afs_proc_cell_volumes_show,
};
/*
- * display a header line followed by a load of volume lines
+ * Display the list of Volume Location servers we're using for a cell.
*/
-static int afs_proc_cell_volumes_show(struct seq_file *m, void *v)
+static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v)
{
- struct afs_cell *cell = PDE_DATA(file_inode(m->file));
- struct afs_volume *vol = list_entry(v, struct afs_volume, proc_link);
+ struct sockaddr_rxrpc *addr = v;
- /* Display header on line 1 */
- if (v == &cell->proc_volumes) {
- seq_puts(m, "USE VID TY\n");
+ /* display header on line 1 */
+ if (v == (void *)1) {
+ seq_puts(m, "ADDRESS\n");
return 0;
}
- seq_printf(m, "%3d %08x %s\n",
- atomic_read(&vol->usage), vol->vid,
- afs_vol_types[vol->type]);
-
+ /* display one cell per line on subsequent lines */
+ seq_printf(m, "%pISp\n", &addr->transport);
return 0;
}
-/*
- * set up the iterator to start reading from the cells list and return the
- * first item
- */
static void *afs_proc_cell_vlservers_start(struct seq_file *m, loff_t *_pos)
__acquires(rcu)
{
@@ -516,14 +289,11 @@ static void *afs_proc_cell_vlservers_start(struct seq_file *m, loff_t *_pos)
return alist->addrs + pos;
}
-/*
- * move to next cell in cells list
- */
-static void *afs_proc_cell_vlservers_next(struct seq_file *p, void *v,
+static void *afs_proc_cell_vlservers_next(struct seq_file *m, void *v,
loff_t *_pos)
{
struct afs_addr_list *alist;
- struct afs_cell *cell = PDE_DATA(file_inode(p->file));
+ struct afs_cell *cell = PDE_DATA(file_inode(m->file));
loff_t pos;
alist = rcu_dereference(cell->vl_addrs);
@@ -536,161 +306,145 @@ static void *afs_proc_cell_vlservers_next(struct seq_file *p, void *v,
return alist->addrs + pos;
}
-/*
- * clean up after reading from the cells list
- */
-static void afs_proc_cell_vlservers_stop(struct seq_file *p, void *v)
+static void afs_proc_cell_vlservers_stop(struct seq_file *m, void *v)
__releases(rcu)
{
rcu_read_unlock();
}
+static const struct seq_operations afs_proc_cell_vlservers_ops = {
+ .start = afs_proc_cell_vlservers_start,
+ .next = afs_proc_cell_vlservers_next,
+ .stop = afs_proc_cell_vlservers_stop,
+ .show = afs_proc_cell_vlservers_show,
+};
+
/*
- * display a header line followed by a load of volume lines
+ * Display the list of fileservers we're using within a namespace.
*/
-static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v)
+static int afs_proc_servers_show(struct seq_file *m, void *v)
{
- struct sockaddr_rxrpc *addr = v;
+ struct afs_server *server;
+ struct afs_addr_list *alist;
+ int i;
- /* display header on line 1 */
- if (v == (void *)1) {
- seq_puts(m, "ADDRESS\n");
+ if (v == SEQ_START_TOKEN) {
+ seq_puts(m, "UUID USE ADDR\n");
return 0;
}
- /* display one cell per line on subsequent lines */
- seq_printf(m, "%pISp\n", &addr->transport);
+ server = list_entry(v, struct afs_server, proc_link);
+ alist = rcu_dereference(server->addresses);
+ seq_printf(m, "%pU %3d %pISpc%s\n",
+ &server->uuid,
+ atomic_read(&server->usage),
+ &alist->addrs[0].transport,
+ alist->index == 0 ? "*" : "");
+ for (i = 1; i < alist->nr_addrs; i++)
+ seq_printf(m, " %pISpc%s\n",
+ &alist->addrs[i].transport,
+ alist->index == i ? "*" : "");
return 0;
}
-/*
- * Set up the iterator to start reading from the server list and return the
- * first item.
- */
static void *afs_proc_servers_start(struct seq_file *m, loff_t *_pos)
__acquires(rcu)
{
- struct afs_net *net = afs_seq2net(m);
-
rcu_read_lock();
- return seq_hlist_start_head_rcu(&net->fs_proc, *_pos);
+ return seq_hlist_start_head_rcu(&afs_seq2net(m)->fs_proc, *_pos);
}
-/*
- * move to next cell in cells list
- */
static void *afs_proc_servers_next(struct seq_file *m, void *v, loff_t *_pos)
{
- struct afs_net *net = afs_seq2net(m);
-
- return seq_hlist_next_rcu(v, &net->fs_proc, _pos);
+ return seq_hlist_next_rcu(v, &afs_seq2net(m)->fs_proc, _pos);
}
-/*
- * clean up after reading from the cells list
- */
-static void afs_proc_servers_stop(struct seq_file *p, void *v)
+static void afs_proc_servers_stop(struct seq_file *m, void *v)
__releases(rcu)
{
rcu_read_unlock();
}
+static const struct seq_operations afs_proc_servers_ops = {
+ .start = afs_proc_servers_start,
+ .next = afs_proc_servers_next,
+ .stop = afs_proc_servers_stop,
+ .show = afs_proc_servers_show,
+};
+
/*
- * display a header line followed by a load of volume lines
+ * Display the list of strings that may be substituted for the @sys pathname
+ * macro.
*/
-static int afs_proc_servers_show(struct seq_file *m, void *v)
+static int afs_proc_sysname_show(struct seq_file *m, void *v)
{
- struct afs_server *server;
- struct afs_addr_list *alist;
-
- if (v == SEQ_START_TOKEN) {
- seq_puts(m, "UUID USE ADDR\n");
- return 0;
- }
+ struct afs_net *net = afs_seq2net(m);
+ struct afs_sysnames *sysnames = net->sysnames;
+ unsigned int i = (unsigned long)v - 1;
- server = list_entry(v, struct afs_server, proc_link);
- alist = rcu_dereference(server->addresses);
- seq_printf(m, "%pU %3d %pISp\n",
- &server->uuid,
- atomic_read(&server->usage),
- &alist->addrs[alist->index].transport);
+ if (i < sysnames->nr)
+ seq_printf(m, "%s\n", sysnames->subs[i]);
return 0;
}
-void afs_put_sysnames(struct afs_sysnames *sysnames)
+static void *afs_proc_sysname_start(struct seq_file *m, loff_t *pos)
+ __acquires(&net->sysnames_lock)
{
- int i;
+ struct afs_net *net = afs_seq2net(m);
+ struct afs_sysnames *names;
- if (sysnames && refcount_dec_and_test(&sysnames->usage)) {
- for (i = 0; i < sysnames->nr; i++)
- if (sysnames->subs[i] != afs_init_sysname &&
- sysnames->subs[i] != sysnames->blank)
- kfree(sysnames->subs[i]);
- }
+ read_lock(&net->sysnames_lock);
+
+ names = net->sysnames;
+ if (*pos >= names->nr)
+ return NULL;
+ return (void *)(unsigned long)(*pos + 1);
}
-/*
- * Handle opening of /proc/fs/afs/sysname. If it is opened for writing, we
- * assume the caller wants to change the substitution list and we allocate a
- * buffer to hold the list.
- */
-static int afs_proc_sysname_open(struct inode *inode, struct file *file)
+static void *afs_proc_sysname_next(struct seq_file *m, void *v, loff_t *pos)
{
- struct afs_sysnames *sysnames;
- struct seq_file *m;
- int ret;
-
- ret = seq_open(file, &afs_proc_sysname_ops);
- if (ret < 0)
- return ret;
+ struct afs_net *net = afs_seq2net(m);
+ struct afs_sysnames *names = net->sysnames;
- if (file->f_mode & FMODE_WRITE) {
- sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL);
- if (!sysnames) {
- seq_release(inode, file);
- return -ENOMEM;
- }
+ *pos += 1;
+ if (*pos >= names->nr)
+ return NULL;
+ return (void *)(unsigned long)(*pos + 1);
+}
- refcount_set(&sysnames->usage, 1);
- m = file->private_data;
- m->private = sysnames;
- }
+static void afs_proc_sysname_stop(struct seq_file *m, void *v)
+ __releases(&net->sysnames_lock)
+{
+ struct afs_net *net = afs_seq2net(m);
- return 0;
+ read_unlock(&net->sysnames_lock);
}
+static const struct seq_operations afs_proc_sysname_ops = {
+ .start = afs_proc_sysname_start,
+ .next = afs_proc_sysname_next,
+ .stop = afs_proc_sysname_stop,
+ .show = afs_proc_sysname_show,
+};
+
/*
- * Handle writes to /proc/fs/afs/sysname to set the @sys substitution.
+ * Allow the @sys substitution to be configured.
*/
-static ssize_t afs_proc_sysname_write(struct file *file,
- const char __user *buf,
- size_t size, loff_t *_pos)
+static int afs_proc_sysname_write(struct file *file, char *buf, size_t size)
{
- struct afs_sysnames *sysnames;
+ struct afs_sysnames *sysnames, *kill;
struct seq_file *m = file->private_data;
- char *kbuf = NULL, *s, *p, *sub;
+ struct afs_net *net = afs_seq2net(m);
+ char *s, *p, *sub;
int ret, len;
- sysnames = m->private;
+ sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL);
if (!sysnames)
- return -EINVAL;
- if (sysnames->error)
- return sysnames->error;
-
- if (size >= PAGE_SIZE - 1) {
- sysnames->error = -EINVAL;
- return -EINVAL;
- }
- if (size == 0)
- return 0;
-
- kbuf = memdup_user_nul(buf, size);
- if (IS_ERR(kbuf))
- return PTR_ERR(kbuf);
-
- inode_lock(file_inode(file));
+ return -ENOMEM;
+ refcount_set(&sysnames->usage, 1);
+ kill = sysnames;
- p = kbuf;
+ p = buf;
while ((s = strsep(&p, " \t\n"))) {
len = strlen(s);
if (len == 0)
@@ -731,85 +485,36 @@ static ssize_t afs_proc_sysname_write(struct file *file,
sysnames->nr++;
}
- ret = size; /* consume everything, always */
+ if (sysnames->nr == 0) {
+ sysnames->subs[0] = sysnames->blank;
+ sysnames->nr++;
+ }
+
+ write_lock(&net->sysnames_lock);
+ kill = net->sysnames;
+ net->sysnames = sysnames;
+ write_unlock(&net->sysnames_lock);
+ ret = 0;
out:
- inode_unlock(file_inode(file));
- kfree(kbuf);
+ afs_put_sysnames(kill);
return ret;
invalid:
ret = -EINVAL;
error:
- sysnames->error = ret;
goto out;
}
-static int afs_proc_sysname_release(struct inode *inode, struct file *file)
+void afs_put_sysnames(struct afs_sysnames *sysnames)
{
- struct afs_sysnames *sysnames, *kill = NULL;
- struct seq_file *m = file->private_data;
- struct afs_net *net = afs_seq2net(m);
+ int i;
- sysnames = m->private;
- if (sysnames) {
- if (!sysnames->error) {
- kill = sysnames;
- if (sysnames->nr == 0) {
- sysnames->subs[0] = sysnames->blank;
- sysnames->nr++;
- }
- write_lock(&net->sysnames_lock);
- kill = net->sysnames;
- net->sysnames = sysnames;
- write_unlock(&net->sysnames_lock);
- }
- afs_put_sysnames(kill);
+ if (sysnames && refcount_dec_and_test(&sysnames->usage)) {
+ for (i = 0; i < sysnames->nr; i++)
+ if (sysnames->subs[i] != afs_init_sysname &&
+ sysnames->subs[i] != sysnames->blank)
+ kfree(sysnames->subs[i]);
}
-
- return seq_release(inode, file);
-}
-
-static void *afs_proc_sysname_start(struct seq_file *m, loff_t *pos)
- __acquires(&net->sysnames_lock)
-{
- struct afs_net *net = afs_seq2net(m);
- struct afs_sysnames *names = net->sysnames;
-
- read_lock(&net->sysnames_lock);
-
- if (*pos >= names->nr)
- return NULL;
- return (void *)(unsigned long)(*pos + 1);
-}
-
-static void *afs_proc_sysname_next(struct seq_file *m, void *v, loff_t *pos)
-{
- struct afs_net *net = afs_seq2net(m);
- struct afs_sysnames *names = net->sysnames;
-
- *pos += 1;
- if (*pos >= names->nr)
- return NULL;
- return (void *)(unsigned long)(*pos + 1);
-}
-
-static void afs_proc_sysname_stop(struct seq_file *m, void *v)
- __releases(&net->sysnames_lock)
-{
- struct afs_net *net = afs_seq2net(m);
-
- read_unlock(&net->sysnames_lock);
-}
-
-static int afs_proc_sysname_show(struct seq_file *m, void *v)
-{
- struct afs_net *net = afs_seq2net(m);
- struct afs_sysnames *sysnames = net->sysnames;
- unsigned int i = (unsigned long)v - 1;
-
- if (i < sysnames->nr)
- seq_printf(m, "%s\n", sysnames->subs[i]);
- return 0;
}
/*
@@ -817,7 +522,7 @@ static int afs_proc_sysname_show(struct seq_file *m, void *v)
*/
static int afs_proc_stats_show(struct seq_file *m, void *v)
{
- struct afs_net *net = afs_seq2net(m);
+ struct afs_net *net = afs_seq2net_single(m);
seq_puts(m, "kAFS statistics\n");
@@ -842,3 +547,101 @@ static int afs_proc_stats_show(struct seq_file *m, void *v)
atomic_long_read(&net->n_store_bytes));
return 0;
}
+
+/*
+ * initialise /proc/fs/afs/<cell>/
+ */
+int afs_proc_cell_setup(struct afs_cell *cell)
+{
+ struct proc_dir_entry *dir;
+ struct afs_net *net = cell->net;
+
+ _enter("%p{%s},%p", cell, cell->name, net->proc_afs);
+
+ dir = proc_net_mkdir(net->net, cell->name, net->proc_afs);
+ if (!dir)
+ goto error_dir;
+
+ if (!proc_create_net_data("vlservers", 0444, dir,
+ &afs_proc_cell_vlservers_ops,
+ sizeof(struct seq_net_private),
+ cell) ||
+ !proc_create_net_data("volumes", 0444, dir,
+ &afs_proc_cell_volumes_ops,
+ sizeof(struct seq_net_private),
+ cell))
+ goto error_tree;
+
+ _leave(" = 0");
+ return 0;
+
+error_tree:
+ remove_proc_subtree(cell->name, net->proc_afs);
+error_dir:
+ _leave(" = -ENOMEM");
+ return -ENOMEM;
+}
+
+/*
+ * remove /proc/fs/afs/<cell>/
+ */
+void afs_proc_cell_remove(struct afs_cell *cell)
+{
+ struct afs_net *net = cell->net;
+
+ _enter("");
+ remove_proc_subtree(cell->name, net->proc_afs);
+ _leave("");
+}
+
+/*
+ * initialise the /proc/fs/afs/ directory
+ */
+int afs_proc_init(struct afs_net *net)
+{
+ struct proc_dir_entry *p;
+
+ _enter("");
+
+ p = proc_net_mkdir(net->net, "afs", net->net->proc_net);
+ if (!p)
+ goto error_dir;
+
+ if (!proc_create_net_data_write("cells", 0644, p,
+ &afs_proc_cells_ops,
+ afs_proc_cells_write,
+ sizeof(struct seq_net_private),
+ NULL) ||
+ !proc_create_net_single_write("rootcell", 0644, p,
+ afs_proc_rootcell_show,
+ afs_proc_rootcell_write,
+ NULL) ||
+ !proc_create_net("servers", 0444, p, &afs_proc_servers_ops,
+ sizeof(struct seq_net_private)) ||
+ !proc_create_net_single("stats", 0444, p, afs_proc_stats_show, NULL) ||
+ !proc_create_net_data_write("sysname", 0644, p,
+ &afs_proc_sysname_ops,
+ afs_proc_sysname_write,
+ sizeof(struct seq_net_private),
+ NULL))
+ goto error_tree;
+
+ net->proc_afs = p;
+ _leave(" = 0");
+ return 0;
+
+error_tree:
+ proc_remove(p);
+error_dir:
+ _leave(" = -ENOMEM");
+ return -ENOMEM;
+}
+
+/*
+ * clean up the /proc/fs/afs/ directory
+ */
+void afs_proc_cleanup(struct afs_net *net)
+{
+ proc_remove(net->proc_afs);
+ net->proc_afs = NULL;
+}
diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c
index 08735948f15d..a1b18082991b 100644
--- a/fs/afs/rxrpc.c
+++ b/fs/afs/rxrpc.c
@@ -46,7 +46,7 @@ int afs_open_socket(struct afs_net *net)
_enter("");
- ret = sock_create_kern(&init_net, AF_RXRPC, SOCK_DGRAM, PF_INET6, &socket);
+ ret = sock_create_kern(net->net, AF_RXRPC, SOCK_DGRAM, PF_INET6, &socket);
if (ret < 0)
goto error_1;
diff --git a/fs/afs/server.c b/fs/afs/server.c
index 3af4625e2f8c..1d329e6981d5 100644
--- a/fs/afs/server.c
+++ b/fs/afs/server.c
@@ -228,7 +228,7 @@ static struct afs_server *afs_alloc_server(struct afs_net *net,
server->flags = (1UL << AFS_SERVER_FL_NEW);
server->update_at = ktime_get_real_seconds() + afs_server_update_delay;
rwlock_init(&server->fs_lock);
- INIT_LIST_HEAD(&server->cb_interests);
+ INIT_HLIST_HEAD(&server->cb_volumes);
rwlock_init(&server->cb_break_lock);
afs_inc_servers_outstanding(net);
diff --git a/fs/afs/super.c b/fs/afs/super.c
index 9e5d7966621c..4d3e274207fb 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -48,6 +48,8 @@ struct file_system_type afs_fs_type = {
};
MODULE_ALIAS_FS("afs");
+int afs_net_id;
+
static const struct super_operations afs_super_ops = {
.statfs = afs_statfs,
.alloc_inode = afs_alloc_inode,
@@ -117,7 +119,7 @@ int __init afs_fs_init(void)
/*
* clean up the filesystem
*/
-void __exit afs_fs_exit(void)
+void afs_fs_exit(void)
{
_enter("");
@@ -351,14 +353,19 @@ static int afs_test_super(struct super_block *sb, void *data)
struct afs_super_info *as1 = data;
struct afs_super_info *as = AFS_FS_S(sb);
- return (as->net == as1->net &&
+ return (as->net_ns == as1->net_ns &&
as->volume &&
- as->volume->vid == as1->volume->vid);
+ as->volume->vid == as1->volume->vid &&
+ !as->dyn_root);
}
static int afs_dynroot_test_super(struct super_block *sb, void *data)
{
- return false;
+ struct afs_super_info *as1 = data;
+ struct afs_super_info *as = AFS_FS_S(sb);
+
+ return (as->net_ns == as1->net_ns &&
+ as->dyn_root);
}
static int afs_set_super(struct super_block *sb, void *data)
@@ -418,10 +425,14 @@ static int afs_fill_super(struct super_block *sb,
if (!sb->s_root)
goto error;
- if (params->dyn_root)
+ if (as->dyn_root) {
sb->s_d_op = &afs_dynroot_dentry_operations;
- else
+ ret = afs_dynroot_populate(sb);
+ if (ret < 0)
+ goto error;
+ } else {
sb->s_d_op = &afs_fs_dentry_operations;
+ }
_leave(" = 0");
return 0;
@@ -437,7 +448,7 @@ static struct afs_super_info *afs_alloc_sbi(struct afs_mount_params *params)
as = kzalloc(sizeof(struct afs_super_info), GFP_KERNEL);
if (as) {
- as->net = afs_get_net(params->net);
+ as->net_ns = get_net(params->net_ns);
if (params->dyn_root)
as->dyn_root = true;
else
@@ -450,12 +461,31 @@ static void afs_destroy_sbi(struct afs_super_info *as)
{
if (as) {
afs_put_volume(as->cell, as->volume);
- afs_put_cell(as->net, as->cell);
- afs_put_net(as->net);
+ afs_put_cell(afs_net(as->net_ns), as->cell);
+ put_net(as->net_ns);
kfree(as);
}
}
+static void afs_kill_super(struct super_block *sb)
+{
+ struct afs_super_info *as = AFS_FS_S(sb);
+ struct afs_net *net = afs_net(as->net_ns);
+
+ if (as->dyn_root)
+ afs_dynroot_depopulate(sb);
+
+ /* Clear the callback interests (which will do ilookup5) before
+ * deactivating the superblock.
+ */
+ if (as->volume)
+ afs_clear_callback_interests(net, as->volume->servers);
+ kill_anon_super(sb);
+ if (as->volume)
+ afs_deactivate_volume(as->volume);
+ afs_destroy_sbi(as);
+}
+
/*
* get an AFS superblock
*/
@@ -472,12 +502,13 @@ static struct dentry *afs_mount(struct file_system_type *fs_type,
_enter(",,%s,%p", dev_name, options);
memset(&params, 0, sizeof(params));
- params.net = &__afs_net;
ret = -EINVAL;
if (current->nsproxy->net_ns != &init_net)
goto error;
-
+ params.net_ns = current->nsproxy->net_ns;
+ params.net = afs_net(params.net_ns);
+
/* parse the options and device name */
if (options) {
ret = afs_parse_options(&params, options, &dev_name);
@@ -563,21 +594,6 @@ error:
return ERR_PTR(ret);
}
-static void afs_kill_super(struct super_block *sb)
-{
- struct afs_super_info *as = AFS_FS_S(sb);
-
- /* Clear the callback interests (which will do ilookup5) before
- * deactivating the superblock.
- */
- if (as->volume)
- afs_clear_callback_interests(as->net, as->volume->servers);
- kill_anon_super(sb);
- if (as->volume)
- afs_deactivate_volume(as->volume);
- afs_destroy_sbi(as);
-}
-
/*
* Initialise an inode cache slab element prior to any use. Note that
* afs_alloc_inode() *must* reset anything that could incorrectly leak from one
diff --git a/fs/namei.c b/fs/namei.c
index 2490ddb8bc90..734cef54fdf8 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2464,6 +2464,35 @@ static int lookup_one_len_common(const char *name, struct dentry *base,
}
/**
+ * try_lookup_one_len - filesystem helper to lookup single pathname component
+ * @name: pathname component to lookup
+ * @base: base directory to lookup from
+ * @len: maximum length @len should be interpreted to
+ *
+ * Look up a dentry by name in the dcache, returning NULL if it does not
+ * currently exist. The function does not try to create a dentry.
+ *
+ * Note that this routine is purely a helper for filesystem usage and should
+ * not be called by generic code.
+ *
+ * The caller must hold base->i_mutex.
+ */
+struct dentry *try_lookup_one_len(const char *name, struct dentry *base, int len)
+{
+ struct qstr this;
+ int err;
+
+ WARN_ON_ONCE(!inode_is_locked(base->d_inode));
+
+ err = lookup_one_len_common(name, base, len, &this);
+ if (err)
+ return ERR_PTR(err);
+
+ return lookup_dcache(&this, base, 0);
+}
+EXPORT_SYMBOL(try_lookup_one_len);
+
+/**
* lookup_one_len - filesystem helper to lookup single pathname component
* @name: pathname component to lookup
* @base: base directory to lookup from
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 7b4d9714f248..6ac1c92997ea 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -409,7 +409,7 @@ static struct proc_dir_entry *__proc_create(struct proc_dir_entry **parent,
if (!ent)
goto out;
- if (qstr.len + 1 <= sizeof(ent->inline_name)) {
+ if (qstr.len + 1 <= SIZEOF_PDE_INLINE_NAME) {
ent->name = ent->inline_name;
} else {
ent->name = kmalloc(qstr.len + 1, GFP_KERNEL);
@@ -740,3 +740,27 @@ void *PDE_DATA(const struct inode *inode)
return __PDE_DATA(inode);
}
EXPORT_SYMBOL(PDE_DATA);
+
+/*
+ * Pull a user buffer into memory and pass it to the file's write handler if
+ * one is supplied. The ->write() method is permitted to modify the
+ * kernel-side buffer.
+ */
+ssize_t proc_simple_write(struct file *f, const char __user *ubuf, size_t size,
+ loff_t *_pos)
+{
+ struct proc_dir_entry *pde = PDE(file_inode(f));
+ char *buf;
+ int ret;
+
+ if (!pde->write)
+ return -EACCES;
+ if (size == 0 || size > PAGE_SIZE - 1)
+ return -EINVAL;
+ buf = memdup_user_nul(ubuf, size);
+ if (IS_ERR(buf))
+ return PTR_ERR(buf);
+ ret = pde->write(f, buf, size);
+ kfree(buf);
+ return ret == 0 ? size : ret;
+}
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 2cf3b74391ca..85ffbd27f288 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -105,9 +105,8 @@ void __init proc_init_kmemcache(void)
kmem_cache_create("pde_opener", sizeof(struct pde_opener), 0,
SLAB_ACCOUNT|SLAB_PANIC, NULL);
proc_dir_entry_cache = kmem_cache_create_usercopy(
- "proc_dir_entry", sizeof(struct proc_dir_entry), 0, SLAB_PANIC,
- offsetof(struct proc_dir_entry, inline_name),
- sizeof_field(struct proc_dir_entry, inline_name), NULL);
+ "proc_dir_entry", SIZEOF_PDE_SLOT, 0, SLAB_PANIC,
+ OFFSETOF_PDE_NAME, SIZEOF_PDE_INLINE_NAME, NULL);
}
static int proc_show_options(struct seq_file *seq, struct dentry *root)
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 50cb22a08c2f..da3dbfa09e79 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -48,6 +48,7 @@ struct proc_dir_entry {
const struct seq_operations *seq_ops;
int (*single_show)(struct seq_file *, void *);
};
+ proc_write_t write;
void *data;
unsigned int state_size;
unsigned int low_ino;
@@ -61,14 +62,20 @@ struct proc_dir_entry {
char *name;
umode_t mode;
u8 namelen;
-#ifdef CONFIG_64BIT
-#define SIZEOF_PDE_INLINE_NAME (192-155)
-#else
-#define SIZEOF_PDE_INLINE_NAME (128-95)
-#endif
- char inline_name[SIZEOF_PDE_INLINE_NAME];
+ char inline_name[];
} __randomize_layout;
+#define OFFSETOF_PDE_NAME offsetof(struct proc_dir_entry, inline_name)
+#define SIZEOF_PDE_SLOT \
+ (OFFSETOF_PDE_NAME + 34 <= 64 ? 64 : \
+ OFFSETOF_PDE_NAME + 34 <= 128 ? 128 : \
+ OFFSETOF_PDE_NAME + 34 <= 192 ? 192 : \
+ OFFSETOF_PDE_NAME + 34 <= 256 ? 256 : \
+ OFFSETOF_PDE_NAME + 34 <= 512 ? 512 : \
+ 0)
+
+#define SIZEOF_PDE_INLINE_NAME (SIZEOF_PDE_SLOT - OFFSETOF_PDE_NAME)
+
extern struct kmem_cache *proc_dir_entry_cache;
void pde_free(struct proc_dir_entry *pde);
@@ -189,6 +196,7 @@ static inline bool is_empty_pde(const struct proc_dir_entry *pde)
{
return S_ISDIR(pde->mode) && !pde->proc_iops;
}
+extern ssize_t proc_simple_write(struct file *, const char __user *, size_t, loff_t *);
/*
* inode.c
diff --git a/fs/proc/proc_net.c b/fs/proc/proc_net.c
index 7d94fa005b0d..d5e0fcb3439e 100644
--- a/fs/proc/proc_net.c
+++ b/fs/proc/proc_net.c
@@ -46,6 +46,9 @@ static int seq_open_net(struct inode *inode, struct file *file)
WARN_ON_ONCE(state_size < sizeof(*p));
+ if (file->f_mode & FMODE_WRITE && !PDE(inode)->write)
+ return -EACCES;
+
net = get_proc_net(inode);
if (!net)
return -ENXIO;
@@ -73,6 +76,7 @@ static int seq_release_net(struct inode *ino, struct file *f)
static const struct file_operations proc_net_seq_fops = {
.open = seq_open_net,
.read = seq_read,
+ .write = proc_simple_write,
.llseek = seq_lseek,
.release = seq_release_net,
};
@@ -93,6 +97,50 @@ struct proc_dir_entry *proc_create_net_data(const char *name, umode_t mode,
}
EXPORT_SYMBOL_GPL(proc_create_net_data);
+/**
+ * proc_create_net_data_write - Create a writable net_ns-specific proc file
+ * @name: The name of the file.
+ * @mode: The file's access mode.
+ * @parent: The parent directory in which to create.
+ * @ops: The seq_file ops with which to read the file.
+ * @write: The write method which which to 'modify' the file.
+ * @data: Data for retrieval by PDE_DATA().
+ *
+ * Create a network namespaced proc file in the @parent directory with the
+ * specified @name and @mode that allows reading of a file that displays a
+ * series of elements and also provides for the file accepting writes that have
+ * some arbitrary effect.
+ *
+ * The functions in the @ops table are used to iterate over items to be
+ * presented and extract the readable content using the seq_file interface.
+ *
+ * The @write function is called with the data copied into a kernel space
+ * scratch buffer and has a NUL appended for convenience. The buffer may be
+ * modified by the @write function. @write should return 0 on success.
+ *
+ * The @data value is accessible from the @show and @write functions by calling
+ * PDE_DATA() on the file inode. The network namespace must be accessed by
+ * calling seq_file_net() on the seq_file struct.
+ */
+struct proc_dir_entry *proc_create_net_data_write(const char *name, umode_t mode,
+ struct proc_dir_entry *parent,
+ const struct seq_operations *ops,
+ proc_write_t write,
+ unsigned int state_size, void *data)
+{
+ struct proc_dir_entry *p;
+
+ p = proc_create_reg(name, mode, &parent, data);
+ if (!p)
+ return NULL;
+ p->proc_fops = &proc_net_seq_fops;
+ p->seq_ops = ops;
+ p->state_size = state_size;
+ p->write = write;
+ return proc_register(parent, p);
+}
+EXPORT_SYMBOL_GPL(proc_create_net_data_write);
+
static int single_open_net(struct inode *inode, struct file *file)
{
struct proc_dir_entry *de = PDE(inode);
@@ -119,6 +167,7 @@ static int single_release_net(struct inode *ino, struct file *f)
static const struct file_operations proc_net_single_fops = {
.open = single_open_net,
.read = seq_read,
+ .write = proc_simple_write,
.llseek = seq_lseek,
.release = single_release_net,
};
@@ -138,6 +187,49 @@ struct proc_dir_entry *proc_create_net_single(const char *name, umode_t mode,
}
EXPORT_SYMBOL_GPL(proc_create_net_single);
+/**
+ * proc_create_net_single_write - Create a writable net_ns-specific proc file
+ * @name: The name of the file.
+ * @mode: The file's access mode.
+ * @parent: The parent directory in which to create.
+ * @show: The seqfile show method with which to read the file.
+ * @write: The write method which which to 'modify' the file.
+ * @data: Data for retrieval by PDE_DATA().
+ *
+ * Create a network-namespaced proc file in the @parent directory with the
+ * specified @name and @mode that allows reading of a file that displays a
+ * single element rather than a series and also provides for the file accepting
+ * writes that have some arbitrary effect.
+ *
+ * The @show function is called to extract the readable content via the
+ * seq_file interface.
+ *
+ * The @write function is called with the data copied into a kernel space
+ * scratch buffer and has a NUL appended for convenience. The buffer may be
+ * modified by the @write function. @write should return 0 on success.
+ *
+ * The @data value is accessible from the @show and @write functions by calling
+ * PDE_DATA() on the file inode. The network namespace must be accessed by
+ * calling seq_file_single_net() on the seq_file struct.
+ */
+struct proc_dir_entry *proc_create_net_single_write(const char *name, umode_t mode,
+ struct proc_dir_entry *parent,
+ int (*show)(struct seq_file *, void *),
+ proc_write_t write,
+ void *data)
+{
+ struct proc_dir_entry *p;
+
+ p = proc_create_reg(name, mode, &parent, data);
+ if (!p)
+ return NULL;
+ p->proc_fops = &proc_net_single_fops;
+ p->single_show = show;
+ p->write = write;
+ return proc_register(parent, p);
+}
+EXPORT_SYMBOL_GPL(proc_create_net_single_write);
+
static struct net *get_proc_task_net(struct inode *dir)
{
struct task_struct *task;
diff --git a/fs/proc/root.c b/fs/proc/root.c
index 61b7340b357a..f4b1a9d2eca6 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -204,8 +204,7 @@ struct proc_dir_entry proc_root = {
.proc_fops = &proc_root_operations,
.parent = &proc_root,
.subdir = RB_ROOT,
- .name = proc_root.inline_name,
- .inline_name = "/proc",
+ .name = "/proc",
};
int pid_ns_prepare_proc(struct pid_namespace *ns)
diff --git a/include/linux/namei.h b/include/linux/namei.h
index a982bb7cd480..a78606e8e3df 100644
--- a/include/linux/namei.h
+++ b/include/linux/namei.h
@@ -81,6 +81,7 @@ extern void done_path_create(struct path *, struct dentry *);
extern struct dentry *kern_path_locked(const char *, struct path *);
extern int kern_path_mountpoint(int, const char *, struct path *, unsigned int);
+extern struct dentry *try_lookup_one_len(const char *, struct dentry *, int);
extern struct dentry *lookup_one_len(const char *, struct dentry *, int);
extern struct dentry *lookup_one_len_unlocked(const char *, struct dentry *, int);
diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index e518352137e7..626fc65c4336 100644
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -14,6 +14,8 @@ struct seq_operations;
#ifdef CONFIG_PROC_FS
+typedef int (*proc_write_t)(struct file *, char *, size_t);
+
extern void proc_root_init(void);
extern void proc_flush_task(struct task_struct *);
@@ -61,6 +63,16 @@ struct proc_dir_entry *proc_create_net_data(const char *name, umode_t mode,
struct proc_dir_entry *proc_create_net_single(const char *name, umode_t mode,
struct proc_dir_entry *parent,
int (*show)(struct seq_file *, void *), void *data);
+struct proc_dir_entry *proc_create_net_data_write(const char *name, umode_t mode,
+ struct proc_dir_entry *parent,
+ const struct seq_operations *ops,
+ proc_write_t write,
+ unsigned int state_size, void *data);
+struct proc_dir_entry *proc_create_net_single_write(const char *name, umode_t mode,
+ struct proc_dir_entry *parent,
+ int (*show)(struct seq_file *, void *),
+ proc_write_t write,
+ void *data);
#else /* CONFIG_PROC_FS */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 06:59:39 +0000