aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--fs/afs/afs.h6
-rw-r--r--fs/afs/fsclient.c270
-rw-r--r--fs/afs/inode.c23
-rw-r--r--fs/afs/internal.h6
-rw-r--r--fs/afs/xdr_fs.h40
5 files changed, 216 insertions, 129 deletions
diff --git a/fs/afs/afs.h b/fs/afs/afs.h
index a670bca6d3ba..b4ff1f7ae4ab 100644
--- a/fs/afs/afs.h
+++ b/fs/afs/afs.h
@@ -131,15 +131,13 @@ struct afs_file_status {
afs_dataversion_t data_version; /* current data version */
time_t mtime_client; /* last time client changed data */
time_t mtime_server; /* last time server changed data */
- unsigned if_version; /* interface version */
-#define AFS_FSTATUS_VERSION 1
unsigned abort_code; /* Abort if bulk-fetching this failed */
afs_file_type_t type; /* file type */
unsigned nlink; /* link count */
u32 author; /* author ID */
- kuid_t owner; /* owner ID */
- kgid_t group; /* group ID */
+ u32 owner; /* owner ID */
+ u32 group; /* group ID */
afs_access_t caller_access; /* access rights for authenticated caller */
afs_access_t anon_access; /* access rights for unauthenticated caller */
umode_t mode; /* UNIX mode */
diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c
index 015bbbba0858..ff87fc6bb27f 100644
--- a/fs/afs/fsclient.c
+++ b/fs/afs/fsclient.c
@@ -16,6 +16,7 @@
#include <linux/iversion.h>
#include "internal.h"
#include "afs_fs.h"
+#include "xdr_fs.h"
static const struct afs_fid afs_zero_fid;
@@ -64,120 +65,160 @@ static void xdr_dump_bad(const __be32 *bp)
}
/*
- * decode an AFSFetchStatus block
+ * Update the core inode struct from a returned status record.
*/
-static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
- struct afs_file_status *status,
- struct afs_vnode *vnode,
- const afs_dataversion_t *expected_version,
- afs_dataversion_t *_version)
+void afs_update_inode_from_status(struct afs_vnode *vnode,
+ struct afs_file_status *status,
+ const afs_dataversion_t *expected_version,
+ u8 flags)
{
- const __be32 *bp = *_bp;
+ struct timespec t;
umode_t mode;
+
+ t.tv_sec = status->mtime_client;
+ t.tv_nsec = 0;
+ vnode->vfs_inode.i_ctime = t;
+ vnode->vfs_inode.i_mtime = t;
+ vnode->vfs_inode.i_atime = t;
+
+ if (flags & (AFS_VNODE_META_CHANGED | AFS_VNODE_NOT_YET_SET)) {
+ vnode->vfs_inode.i_uid = make_kuid(&init_user_ns, status->owner);
+ vnode->vfs_inode.i_gid = make_kgid(&init_user_ns, status->group);
+ set_nlink(&vnode->vfs_inode, status->nlink);
+
+ mode = vnode->vfs_inode.i_mode;
+ mode &= ~S_IALLUGO;
+ mode |= status->mode;
+ barrier();
+ vnode->vfs_inode.i_mode = mode;
+ }
+
+ if (!(flags & AFS_VNODE_NOT_YET_SET)) {
+ if (expected_version &&
+ *expected_version != status->data_version) {
+ _debug("vnode modified %llx on {%x:%u} [exp %llx]",
+ (unsigned long long) status->data_version,
+ vnode->fid.vid, vnode->fid.vnode,
+ (unsigned long long) *expected_version);
+ set_bit(AFS_VNODE_DIR_MODIFIED, &vnode->flags);
+ set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags);
+ }
+ }
+
+ if (flags & (AFS_VNODE_DATA_CHANGED | AFS_VNODE_NOT_YET_SET)) {
+ inode_set_iversion_raw(&vnode->vfs_inode, status->data_version);
+ i_size_write(&vnode->vfs_inode, status->size);
+ }
+}
+
+/*
+ * decode an AFSFetchStatus block
+ */
+static int xdr_decode_AFSFetchStatus(const __be32 **_bp,
+ struct afs_file_status *status,
+ struct afs_vnode *vnode,
+ const afs_dataversion_t *expected_version,
+ afs_dataversion_t *_version)
+{
+ const struct afs_xdr_AFSFetchStatus *xdr = (const void *)*_bp;
u64 data_version, size;
- bool changed = false;
- kuid_t owner;
- kgid_t group;
+ u32 type, abort_code;
+ u8 flags = 0;
+ int ret;
if (vnode)
write_seqlock(&vnode->cb_lock);
-#define EXTRACT(DST) \
- do { \
- u32 x = ntohl(*bp++); \
- if (DST != x) \
- changed |= true; \
- DST = x; \
- } while (0)
-
- status->if_version = ntohl(*bp++);
- EXTRACT(status->type);
- EXTRACT(status->nlink);
- size = ntohl(*bp++);
- data_version = ntohl(*bp++);
- EXTRACT(status->author);
- owner = make_kuid(&init_user_ns, ntohl(*bp++));
- changed |= !uid_eq(owner, status->owner);
- status->owner = owner;
- EXTRACT(status->caller_access); /* call ticket dependent */
- EXTRACT(status->anon_access);
- EXTRACT(status->mode);
- bp++; /* parent.vnode */
- bp++; /* parent.unique */
- bp++; /* seg size */
- status->mtime_client = ntohl(*bp++);
- status->mtime_server = ntohl(*bp++);
- group = make_kgid(&init_user_ns, ntohl(*bp++));
- changed |= !gid_eq(group, status->group);
- status->group = group;
- bp++; /* sync counter */
- data_version |= (u64) ntohl(*bp++) << 32;
- EXTRACT(status->lock_count);
- size |= (u64) ntohl(*bp++) << 32;
- EXTRACT(status->abort_code); /* spare 4 */
- *_bp = bp;
+ if (xdr->if_version != htonl(AFS_FSTATUS_VERSION)) {
+ pr_warn("Unknown AFSFetchStatus version %u\n", ntohl(xdr->if_version));
+ goto bad;
+ }
- switch (status->type) {
+ type = ntohl(xdr->type);
+ abort_code = ntohl(xdr->abort_code);
+ switch (type) {
case AFS_FTYPE_FILE:
case AFS_FTYPE_DIR:
case AFS_FTYPE_SYMLINK:
+ if (type != status->type &&
+ vnode &&
+ !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
+ pr_warning("Vnode %x:%x:%x changed type %u to %u\n",
+ vnode->fid.vid,
+ vnode->fid.vnode,
+ vnode->fid.unique,
+ status->type, type);
+ goto bad;
+ }
+ status->type = type;
break;
case AFS_FTYPE_INVALID:
- if (status->abort_code != 0)
+ if (abort_code != 0) {
+ status->abort_code = abort_code;
goto out;
+ }
/* Fall through */
default:
- xdr_dump_bad(bp - 2);
- goto out;
+ goto bad;
}
+#define EXTRACT_M(FIELD) \
+ do { \
+ u32 x = ntohl(xdr->FIELD); \
+ if (status->FIELD != x) { \
+ flags |= AFS_VNODE_META_CHANGED; \
+ status->FIELD = x; \
+ } \
+ } while (0)
+
+ EXTRACT_M(nlink);
+ EXTRACT_M(author);
+ EXTRACT_M(owner);
+ EXTRACT_M(caller_access); /* call ticket dependent */
+ EXTRACT_M(anon_access);
+ EXTRACT_M(mode);
+ EXTRACT_M(group);
+
+ status->mtime_client = ntohl(xdr->mtime_client);
+ status->mtime_server = ntohl(xdr->mtime_server);
+ status->lock_count = ntohl(xdr->lock_count);
+
+ size = (u64)ntohl(xdr->size_lo);
+ size |= (u64)ntohl(xdr->size_hi) << 32;
if (size != status->size) {
status->size = size;
- changed |= true;
+ flags |= AFS_VNODE_DATA_CHANGED;
+ }
+
+ data_version = (u64)ntohl(xdr->data_version_lo);
+ data_version |= (u64)ntohl(xdr->data_version_hi) << 32;
+ if (data_version != status->data_version) {
+ status->data_version = data_version;
+ flags |= AFS_VNODE_DATA_CHANGED;
}
- status->mode &= S_IALLUGO;
if (_version)
*_version = data_version;
- _debug("vnode time %lx, %lx",
- status->mtime_client, status->mtime_server);
+ *_bp = (const void *)*_bp + sizeof(*xdr);
if (vnode) {
- if (changed && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
- _debug("vnode changed");
- i_size_write(&vnode->vfs_inode, size);
- vnode->vfs_inode.i_uid = status->owner;
- vnode->vfs_inode.i_gid = status->group;
- vnode->vfs_inode.i_generation = vnode->fid.unique;
- set_nlink(&vnode->vfs_inode, status->nlink);
-
- mode = vnode->vfs_inode.i_mode;
- mode &= ~S_IALLUGO;
- mode |= status->mode;
- barrier();
- vnode->vfs_inode.i_mode = mode;
- }
-
- vnode->vfs_inode.i_ctime.tv_sec = status->mtime_client;
- vnode->vfs_inode.i_mtime = vnode->vfs_inode.i_ctime;
- vnode->vfs_inode.i_atime = vnode->vfs_inode.i_ctime;
- inode_set_iversion_raw(&vnode->vfs_inode, data_version);
+ if (test_bit(AFS_VNODE_UNSET, &vnode->flags))
+ flags |= AFS_VNODE_NOT_YET_SET;
+ afs_update_inode_from_status(vnode, status, expected_version,
+ flags);
}
- status->data_version = data_version;
- if (expected_version && *expected_version != data_version) {
- if (vnode && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
- _debug("vnode modified %llx on {%x:%u}",
- (unsigned long long) data_version,
- vnode->fid.vid, vnode->fid.vnode);
- set_bit(AFS_VNODE_DIR_MODIFIED, &vnode->flags);
- set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags);
- }
- }
+ ret = 0;
out:
if (vnode)
write_sequnlock(&vnode->cb_lock);
+ return ret;
+
+bad:
+ xdr_dump_bad(*_bp);
+ ret = -EBADMSG;
+ goto out;
}
/*
@@ -319,8 +360,9 @@ 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;
- xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
- &call->expected_version, NULL);
+ if (xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
+ &call->expected_version, NULL) < 0)
+ return -EBADMSG;
xdr_decode_AFSCallBack(call, vnode, &bp);
if (call->reply[1])
xdr_decode_AFSVolSync(&bp, call->reply[1]);
@@ -499,9 +541,10 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call)
return ret;
bp = call->buffer;
- xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
- &vnode->status.data_version,
- &req->new_version);
+ if (xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
+ &vnode->status.data_version,
+ &req->new_version) < 0)
+ return -EBADMSG;
xdr_decode_AFSCallBack(call, vnode, &bp);
if (call->reply[1])
xdr_decode_AFSVolSync(&bp, call->reply[1]);
@@ -652,9 +695,10 @@ 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]);
- xdr_decode_AFSFetchStatus(&bp, call->reply[2], NULL, NULL, NULL);
- xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
- &call->expected_version, NULL);
+ if (xdr_decode_AFSFetchStatus(&bp, call->reply[2], NULL, NULL, NULL) < 0 ||
+ xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
+ &call->expected_version, NULL) < 0)
+ return -EBADMSG;
xdr_decode_AFSCallBack_raw(&bp, call->reply[3]);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
@@ -756,8 +800,9 @@ static int afs_deliver_fs_remove(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
- xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
- &call->expected_version, NULL);
+ if (xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
+ &call->expected_version, NULL) < 0)
+ return -EBADMSG;
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
_leave(" = 0 [done]");
@@ -844,9 +889,10 @@ static int afs_deliver_fs_link(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
- xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL, NULL);
- xdr_decode_AFSFetchStatus(&bp, &dvnode->status, dvnode,
- &call->expected_version, NULL);
+ if (xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL, NULL) < 0 ||
+ xdr_decode_AFSFetchStatus(&bp, &dvnode->status, dvnode,
+ &call->expected_version, NULL) < 0)
+ return -EBADMSG;
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
_leave(" = 0 [done]");
@@ -930,9 +976,10 @@ 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]);
- xdr_decode_AFSFetchStatus(&bp, call->reply[2], NULL, NULL, NULL);
- xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
- &call->expected_version, NULL);
+ if (xdr_decode_AFSFetchStatus(&bp, call->reply[2], NULL, NULL, NULL) ||
+ xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
+ &call->expected_version, NULL) < 0)
+ return -EBADMSG;
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
_leave(" = 0 [done]");
@@ -1034,11 +1081,13 @@ static int afs_deliver_fs_rename(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
- xdr_decode_AFSFetchStatus(&bp, &orig_dvnode->status, orig_dvnode,
- &call->expected_version, NULL);
- if (new_dvnode != orig_dvnode)
- xdr_decode_AFSFetchStatus(&bp, &new_dvnode->status, new_dvnode,
- &call->expected_version_2, NULL);
+ if (xdr_decode_AFSFetchStatus(&bp, &orig_dvnode->status, orig_dvnode,
+ &call->expected_version, NULL) < 0)
+ return -EBADMSG;
+ if (new_dvnode != orig_dvnode &&
+ xdr_decode_AFSFetchStatus(&bp, &new_dvnode->status, new_dvnode,
+ &call->expected_version_2, NULL) < 0)
+ return -EBADMSG;
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
_leave(" = 0 [done]");
@@ -1139,8 +1188,9 @@ static int afs_deliver_fs_store_data(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
- xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
- &call->expected_version, NULL);
+ if (xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
+ &call->expected_version, NULL) < 0)
+ return -EBADMSG;
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
afs_pages_written_back(vnode, call);
@@ -1314,8 +1364,9 @@ static int afs_deliver_fs_store_status(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
- xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
- &call->expected_version, NULL);
+ if (xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
+ &call->expected_version, NULL) < 0)
+ return -EBADMSG;
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
_leave(" = 0 [done]");
@@ -2127,9 +2178,10 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
bp = call->buffer;
statuses = call->reply[1];
- xdr_decode_AFSFetchStatus(&bp, &statuses[call->count],
- call->count == 0 ? vnode : NULL,
- NULL, NULL);
+ if (xdr_decode_AFSFetchStatus(&bp, &statuses[call->count],
+ call->count == 0 ? vnode : NULL,
+ NULL, NULL) < 0)
+ return -EBADMSG;
call->count++;
if (call->count < call->count2)
diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index 488abd78dc26..2e32d475ec11 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -30,12 +30,11 @@ static const struct inode_operations afs_symlink_inode_operations = {
};
/*
- * map the AFS file status to the inode member variables
+ * Initialise an inode from the vnode status.
*/
-static int afs_inode_map_status(struct afs_vnode *vnode, struct key *key)
+static int afs_inode_init_from_status(struct afs_vnode *vnode, struct key *key)
{
struct inode *inode = AFS_VNODE_TO_I(vnode);
- bool changed;
_debug("FS: ft=%d lk=%d sz=%llu ver=%Lu mod=%hu",
vnode->status.type,
@@ -46,6 +45,9 @@ static int afs_inode_map_status(struct afs_vnode *vnode, struct key *key)
read_seqlock_excl(&vnode->cb_lock);
+ afs_update_inode_from_status(vnode, &vnode->status, NULL,
+ AFS_VNODE_NOT_YET_SET);
+
switch (vnode->status.type) {
case AFS_FTYPE_FILE:
inode->i_mode = S_IFREG | vnode->status.mode;
@@ -79,24 +81,13 @@ static int afs_inode_map_status(struct afs_vnode *vnode, struct key *key)
return -EBADMSG;
}
- changed = (vnode->status.size != inode->i_size);
-
- set_nlink(inode, vnode->status.nlink);
- inode->i_uid = vnode->status.owner;
- inode->i_gid = vnode->status.group;
- inode->i_size = vnode->status.size;
- inode->i_ctime.tv_sec = vnode->status.mtime_client;
- inode->i_ctime.tv_nsec = 0;
- inode->i_atime = inode->i_mtime = inode->i_ctime;
inode->i_blocks = 0;
- inode->i_generation = vnode->fid.unique;
- inode_set_iversion_raw(inode, vnode->status.data_version);
inode->i_mapping->a_ops = &afs_fs_aops;
read_sequnlock_excl(&vnode->cb_lock);
#ifdef CONFIG_AFS_FSCACHE
- if (changed)
+ if (vnode->status.size > 0)
fscache_attr_changed(vnode->cache);
#endif
return 0;
@@ -331,7 +322,7 @@ struct inode *afs_iget(struct super_block *sb, struct key *key,
vnode->cb_expires_at += ktime_get_real_seconds();
}
- ret = afs_inode_map_status(vnode, key);
+ ret = afs_inode_init_from_status(vnode, key);
if (ret < 0)
goto bad_inode;
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index 6b72807c40af..ac3076c2a8e8 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -704,6 +704,12 @@ extern int afs_flock(struct file *, int, struct file_lock *);
/*
* fsclient.c
*/
+#define AFS_VNODE_NOT_YET_SET 0x01
+#define AFS_VNODE_META_CHANGED 0x02
+#define AFS_VNODE_DATA_CHANGED 0x04
+extern void afs_update_inode_from_status(struct afs_vnode *, struct afs_file_status *,
+ const afs_dataversion_t *, u8);
+
extern int afs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_volsync *, bool);
extern int afs_fs_give_up_callbacks(struct afs_net *, struct afs_server *);
extern int afs_fs_fetch_data(struct afs_fs_cursor *, struct afs_read *);
diff --git a/fs/afs/xdr_fs.h b/fs/afs/xdr_fs.h
new file mode 100644
index 000000000000..24e23e40c979
--- /dev/null
+++ b/fs/afs/xdr_fs.h
@@ -0,0 +1,40 @@
+/* AFS fileserver XDR types
+ *
+ * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#ifndef XDR_FS_H
+#define XDR_FS_H
+
+struct afs_xdr_AFSFetchStatus {
+ __be32 if_version;
+#define AFS_FSTATUS_VERSION 1
+ __be32 type;
+ __be32 nlink;
+ __be32 size_lo;
+ __be32 data_version_lo;
+ __be32 author;
+ __be32 owner;
+ __be32 caller_access;
+ __be32 anon_access;
+ __be32 mode;
+ __be32 parent_vnode;
+ __be32 parent_unique;
+ __be32 seg_size;
+ __be32 mtime_client;
+ __be32 mtime_server;
+ __be32 group;
+ __be32 sync_counter;
+ __be32 data_version_hi;
+ __be32 lock_count;
+ __be32 size_hi;
+ __be32 abort_code;
+} __packed;
+
+#endif /* XDR_FS_H */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.