korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-11 04:18:39 +08:00
Code Issues Packages Projects Releases Wiki Activity

AFS Development

Browse Source 
-----BEGIN PGP SIGNATURE-----
 
 iQIVAwUAXNGpJPu3V2unywtrAQIVVQ//ZaEhskofcXYCsyO9pXshVKCZmp1pZ9Q3
 ecbTbrF18guwHfM25LURidtjBmEAeuG5NOac/XHxcUbn5NUVzBQ1FircTVmLgtGY
 yjrBmMSqIDYhghslLAv78/HibdHJ+Flqy3RWAMyDMecTvx7VGx4idZQl5QIDbNEb
 GNvGP3WRiHG8tm6dykfm3afQoAS+n5seBBPDFucqPzAYa/Z/mBLgaZRKbmuMwEAe
 Q2mAf7vhYgw55JzeTSZZ4sWGP9Z+9Mi/18Hu8QvJwsrJW+jHlzJHtJp0EphSa3Xs
 YIRx+6AQ7WqAhnBUzzY5nBzMClIfMv1GrCG/6rXTTI/UYX65kVAP5M8EW6BAI8oX
 Fz2hJqCIvF8ZCSxIYLqizlEkxmEvfmwYxueX9km/+dfTma+MIaajMge+n3fDYmls
 S4RONn2LuqVeIw3m8DtKUBr7VRP0J9s1z0O4kubCtZt5PKNekvzSQSMIc17sXSST
 Uuo7aL3W6Lxk4bLMmB8o/Rf2RHBZlhmpPk8rF+I6jd0Q45SDV/TttqygyvKZseDo
 MZbnmBiDElDWXyKE6gxQqdC13tpb3MlCPv1L+xKDPArXe9yjq2XvHY4NtYBMCa5U
 iO1v+6W1JrGh8bkE72YuxKcBVVOStQxhHGU4D8WKZjOI7oeU87U7AD/8kSRhKQni
 VRXY1z87sZk=
 =yiyv
 -----END PGP SIGNATURE-----

Merge tag 'afs-next-20190507' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

Pull AFS updates from David Howells:
 "A set of fix and development patches for AFS for 5.2.

  Summary:

   - Fix the AFS file locking so that sqlite can run on an AFS mount and
     also so that firefox and gnome can use a homedir that's mounted
     through AFS.

     This required emulation of fine-grained locking when the server
     will only support whole-file locks and no upgrade/downgrade. Four
     modes are provided, settable by mount parameter:

       "flock=local"   - No reference to the server

       "flock=openafs" - Fine-grained locks are local-only, whole-file
                         locks require sufficient server locks

       "flock=strict"  - All locks require sufficient server locks

       "flock=write"   - Always get an exclusive server lock

     If the volume is a read-only or backup volume, then flock=local for
     that volume.

   - Log extra information for a couple of cases where the client mucks
     up somehow: AFS vnode with undefined type and dir check failure -
     in both cases we seem to end up with unfilled data, but the issues
     happen infrequently and are difficult to reproduce at will.

   - Implement silly rename for unlink() and rename().

   - Set i_blocks so that du can get some information about usage.

   - Fix xattr handlers to return the right amount of data and to not
     overflow buffers.

   - Implement getting/setting raw AFS and YFS ACLs as xattrs"

* tag 'afs-next-20190507' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
  afs: Implement YFS ACL setting
  afs: Get YFS ACLs and information through xattrs
  afs: implement acl setting
  afs: Get an AFS3 ACL as an xattr
  afs: Fix getting the afs.fid xattr
  afs: Fix the afs.cell and afs.volume xattr handlers
  afs: Calculate i_blocks based on file size
  afs: Log more information for "kAFS: AFS vnode with undefined type\n"
  afs: Provide mount-time configurable byte-range file locking emulation
  afs: Add more tracepoints
  afs: Implement sillyrename for unlink and rename
  afs: Add directory reload tracepoint
  afs: Handle lock rpc ops failing on a file that got deleted
  afs: Improve dir check failure reports
  afs: Add file locking tracepoints
  afs: Further fix file locking
  afs: Fix AFS file locking to allow fine grained locks
  afs: Calculate lock extend timer from set/extend reply reception
  afs: Split wait from afs_make_call()
This commit is contained in:
Linus Torvalds 2019-05-07 20:51:58 -07:00
commit e5fef2a973
18 changed files with 2142 additions and 378 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
fs/afs/Makefile
View File

@ -13,6 +13,7 @@ kafs-y := \
cmservice.o \
dir.o \
dir_edit.o \
dir_silly.o \
dynroot.o \
file.o \
flock.o \

2
fs/afs/afs_fs.h
View File

@ -17,8 +17,10 @@
enum AFS_FS_Operations {
FSFETCHDATA = 130, /* AFS Fetch file data */
FSFETCHACL = 131, /* AFS Fetch file ACL */
FSFETCHSTATUS = 132, /* AFS Fetch file status */
FSSTOREDATA = 133, /* AFS Store file data */
FSSTOREACL = 134, /* AFS Store file ACL */
FSSTORESTATUS = 135, /* AFS Store file status */
FSREMOVEFILE = 136, /* AFS Remove a file */
FSCREATEFILE = 137, /* AFS Create a file */

167
fs/afs/dir.c
View File

@ -26,6 +26,7 @@ static int afs_dir_open(struct inode *inode, struct file *file);
static int afs_readdir(struct file *file, struct dir_context *ctx);
static int afs_d_revalidate(struct dentry *dentry, unsigned int flags);
static int afs_d_delete(const struct dentry *dentry);
static void afs_d_iput(struct dentry *dentry, struct inode *inode);
static int afs_lookup_one_filldir(struct dir_context *ctx, const char *name, int nlen,
loff_t fpos, u64 ino, unsigned dtype);
static int afs_lookup_filldir(struct dir_context *ctx, const char *name, int nlen,
@ -85,6 +86,7 @@ const struct dentry_operations afs_fs_dentry_operations = {
.d_delete = afs_d_delete,
.d_release = afs_d_release,
.d_automount = afs_d_automount,
.d_iput = afs_d_iput,
};
struct afs_lookup_one_cookie {
@ -159,6 +161,38 @@ error:
return false;
}
/*
* Check the contents of a directory that we've just read.
*/
static bool afs_dir_check_pages(struct afs_vnode *dvnode, struct afs_read *req)
{
struct afs_xdr_dir_page *dbuf;
unsigned int i, j, qty = PAGE_SIZE / sizeof(union afs_xdr_dir_block);
for (i = 0; i < req->nr_pages; i++)
if (!afs_dir_check_page(dvnode, req->pages[i], req->actual_len))
goto bad;
return true;
bad:
pr_warn("DIR %llx:%llx f=%llx l=%llx al=%llx r=%llx\n",
dvnode->fid.vid, dvnode->fid.vnode,
req->file_size, req->len, req->actual_len, req->remain);
pr_warn("DIR %llx %x %x %x\n",
req->pos, req->index, req->nr_pages, req->offset);
for (i = 0; i < req->nr_pages; i++) {
dbuf = kmap(req->pages[i]);
for (j = 0; j < qty; j++) {
union afs_xdr_dir_block *block = &dbuf->blocks[j];
pr_warn("[%02x] %32phN\n", i * qty + j, block);
}
kunmap(req->pages[i]);
}
return false;
}
/*
* open an AFS directory file
*/
@ -277,6 +311,7 @@ retry:
goto error;
if (!test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) {
trace_afs_reload_dir(dvnode);
ret = afs_fetch_data(dvnode, key, req);
if (ret < 0)
goto error_unlock;
@ -288,10 +323,8 @@ retry:
/* Validate the data we just read. */
ret = -EIO;
for (i = 0; i < req->nr_pages; i++)
if (!afs_dir_check_page(dvnode, req->pages[i],
req->actual_len))
goto error_unlock;
if (!afs_dir_check_pages(dvnode, req))
goto error_unlock;
// TODO: Trim excess pages
@ -743,7 +776,7 @@ success:
ti = afs_iget(dir->i_sb, key, &cookie->fids[i],
&cookie->statuses[i],
&cookie->callbacks[i],
cbi);
cbi, dvnode);
if (i == 0) {
inode = ti;
} else {
@ -875,8 +908,14 @@ static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
(void *)(unsigned long)dvnode->status.data_version;
}
d = d_splice_alias(inode, dentry);
if (!IS_ERR_OR_NULL(d))
if (!IS_ERR_OR_NULL(d)) {
d->d_fsdata = dentry->d_fsdata;
trace_afs_lookup(dvnode, &d->d_name,
inode ? AFS_FS_I(inode) : NULL);
} else {
trace_afs_lookup(dvnode, &dentry->d_name,
inode ? AFS_FS_I(inode) : NULL);
}
return d;
}
@ -1052,6 +1091,16 @@ zap:
return 1;
}
/*
* Clean up sillyrename files on dentry removal.
*/
static void afs_d_iput(struct dentry *dentry, struct inode *inode)
{
if (dentry->d_flags & DCACHE_NFSFS_RENAMED)
afs_silly_iput(dentry, inode);
iput(inode);
}
/*
* handle dentry release
*/
@ -1076,7 +1125,7 @@ static void afs_vnode_new_inode(struct afs_fs_cursor *fc,
return;
inode = afs_iget(fc->vnode->vfs_inode.i_sb, fc->key,
newfid, newstatus, newcb, fc->cbi);
newfid, newstatus, newcb, fc->cbi, fc->vnode);
if (IS_ERR(inode)) {
/* ENOMEM or EINTR at a really inconvenient time - just abandon
* the new directory on the server.
@ -1194,6 +1243,12 @@ static int afs_rmdir(struct inode *dir, struct dentry *dentry)
goto error_key;
}
if (vnode) {
ret = down_write_killable(&vnode->rmdir_lock);
if (ret < 0)
goto error_key;
}
ret = -ERESTARTSYS;
if (afs_begin_vnode_operation(&fc, dvnode, key)) {
while (afs_select_fileserver(&fc)) {
@ -1212,6 +1267,8 @@ static int afs_rmdir(struct inode *dir, struct dentry *dentry)
}
}
if (vnode)
up_write(&vnode->rmdir_lock);
error_key:
key_put(key);
error:
@ -1228,9 +1285,9 @@ error:
* However, if we didn't have a callback promise outstanding, or it was
* outstanding on a different server, then it won't break it either...
*/
static int afs_dir_remove_link(struct dentry *dentry, struct key *key,
unsigned long d_version_before,
unsigned long d_version_after)
int afs_dir_remove_link(struct dentry *dentry, struct key *key,
unsigned long d_version_before,
unsigned long d_version_after)
{
bool dir_valid;
int ret = 0;
@ -1277,6 +1334,7 @@ static int afs_unlink(struct inode *dir, struct dentry *dentry)
struct afs_vnode *dvnode = AFS_FS_I(dir), *vnode = NULL;
struct key *key;
unsigned long d_version = (unsigned long)dentry->d_fsdata;
bool need_rehash = false;
u64 data_version = dvnode->status.data_version;
int ret;
@ -1300,6 +1358,21 @@ static int afs_unlink(struct inode *dir, struct dentry *dentry)
goto error_key;
}
spin_lock(&dentry->d_lock);
if (vnode && d_count(dentry) > 1) {
spin_unlock(&dentry->d_lock);
/* Start asynchronous writeout of the inode */
write_inode_now(d_inode(dentry), 0);
ret = afs_sillyrename(dvnode, vnode, dentry, key);
goto error_key;
}
if (!d_unhashed(dentry)) {
/* Prevent a race with RCU lookup. */
__d_drop(dentry);
need_rehash = true;
}
spin_unlock(&dentry->d_lock);
ret = -ERESTARTSYS;
if (afs_begin_vnode_operation(&fc, dvnode, key)) {
while (afs_select_fileserver(&fc)) {
@ -1331,6 +1404,9 @@ static int afs_unlink(struct inode *dir, struct dentry *dentry)
afs_edit_dir_for_unlink);
}
if (need_rehash && ret < 0 && ret != -ENOENT)
d_rehash(dentry);
error_key:
key_put(key);
error:
@ -1551,6 +1627,8 @@ static int afs_rename(struct inode *old_dir, struct dentry *old_dentry,
{
struct afs_fs_cursor fc;
struct afs_vnode *orig_dvnode, *new_dvnode, *vnode;
struct dentry *tmp = NULL, *rehash = NULL;
struct inode *new_inode;
struct key *key;
u64 orig_data_version, new_data_version;
bool new_negative = d_is_negative(new_dentry);
@ -1559,6 +1637,10 @@ static int afs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (flags)
return -EINVAL;
/* Don't allow silly-rename files be moved around. */
if (old_dentry->d_flags & DCACHE_NFSFS_RENAMED)
return -EINVAL;
vnode = AFS_FS_I(d_inode(old_dentry));
orig_dvnode = AFS_FS_I(old_dir);
new_dvnode = AFS_FS_I(new_dir);
@ -1577,12 +1659,48 @@ static int afs_rename(struct inode *old_dir, struct dentry *old_dentry,
goto error;
}
/* For non-directories, check whether the target is busy and if so,
* make a copy of the dentry and then do a silly-rename. If the
* silly-rename succeeds, the copied dentry is hashed and becomes the
* new target.
*/
if (d_is_positive(new_dentry) && !d_is_dir(new_dentry)) {
/* To prevent any new references to the target during the
* rename, we unhash the dentry in advance.
*/
if (!d_unhashed(new_dentry)) {
d_drop(new_dentry);
rehash = new_dentry;
}
if (d_count(new_dentry) > 2) {
/* copy the target dentry's name */
ret = -ENOMEM;
tmp = d_alloc(new_dentry->d_parent,
&new_dentry->d_name);
if (!tmp)
goto error_rehash;
ret = afs_sillyrename(new_dvnode,
AFS_FS_I(d_inode(new_dentry)),
new_dentry, key);
if (ret)
goto error_rehash;
new_dentry = tmp;
rehash = NULL;
new_negative = true;
orig_data_version = orig_dvnode->status.data_version;
new_data_version = new_dvnode->status.data_version;
}
}
ret = -ERESTARTSYS;
if (afs_begin_vnode_operation(&fc, orig_dvnode, key)) {
if (orig_dvnode != new_dvnode) {
if (mutex_lock_interruptible_nested(&new_dvnode->io_lock, 1) < 0) {
afs_end_vnode_operation(&fc);
goto error_key;
goto error_rehash;
}
}
while (afs_select_fileserver(&fc)) {
@ -1599,25 +1717,42 @@ static int afs_rename(struct inode *old_dir, struct dentry *old_dentry,
mutex_unlock(&new_dvnode->io_lock);
ret = afs_end_vnode_operation(&fc);
if (ret < 0)
goto error_key;
goto error_rehash;
}
if (ret == 0) {
if (rehash)
d_rehash(rehash);
if (test_bit(AFS_VNODE_DIR_VALID, &orig_dvnode->flags))
afs_edit_dir_remove(orig_dvnode, &old_dentry->d_name,
afs_edit_dir_for_rename);
afs_edit_dir_for_rename_0);
if (!new_negative &&
test_bit(AFS_VNODE_DIR_VALID, &new_dvnode->flags))
afs_edit_dir_remove(new_dvnode, &new_dentry->d_name,
afs_edit_dir_for_rename);
afs_edit_dir_for_rename_1);
if (test_bit(AFS_VNODE_DIR_VALID, &new_dvnode->flags))
afs_edit_dir_add(new_dvnode, &new_dentry->d_name,
&vnode->fid, afs_edit_dir_for_rename);
&vnode->fid, afs_edit_dir_for_rename_2);
new_inode = d_inode(new_dentry);
if (new_inode) {
spin_lock(&new_inode->i_lock);
if (new_inode->i_nlink > 0)
drop_nlink(new_inode);
spin_unlock(&new_inode->i_lock);
}
d_move(old_dentry, new_dentry);
goto error_tmp;
}
error_key:
error_rehash:
if (rehash)
d_rehash(rehash);
error_tmp:
if (tmp)
dput(tmp);
key_put(key);
error:
_leave(" = %d", ret);

239
fs/afs/dir_silly.c Normal file
View File

@ -0,0 +1,239 @@
/* AFS silly rename handling
*
* Copyright (C) 2019 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
* - Derived from NFS's sillyrename.
*
* 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.
*/
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/namei.h>
#include <linux/fsnotify.h>
#include "internal.h"
/*
* Actually perform the silly rename step.
*/
static int afs_do_silly_rename(struct afs_vnode *dvnode, struct afs_vnode *vnode,
struct dentry *old, struct dentry *new,
struct key *key)
{
struct afs_fs_cursor fc;
u64 dir_data_version = dvnode->status.data_version;
int ret = -ERESTARTSYS;
_enter("%pd,%pd", old, new);
trace_afs_silly_rename(vnode, false);
if (afs_begin_vnode_operation(&fc, dvnode, key)) {
while (afs_select_fileserver(&fc)) {
fc.cb_break = afs_calc_vnode_cb_break(dvnode);
afs_fs_rename(&fc, old->d_name.name,
dvnode, new->d_name.name,
dir_data_version, dir_data_version);
}
afs_vnode_commit_status(&fc, dvnode, fc.cb_break);
ret = afs_end_vnode_operation(&fc);
}
if (ret == 0) {
spin_lock(&old->d_lock);
old->d_flags |= DCACHE_NFSFS_RENAMED;
spin_unlock(&old->d_lock);
if (dvnode->silly_key != key) {
key_put(dvnode->silly_key);
dvnode->silly_key = key_get(key);
}
if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags))
afs_edit_dir_remove(dvnode, &old->d_name,
afs_edit_dir_for_silly_0);
if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags))
afs_edit_dir_add(dvnode, &new->d_name,
&vnode->fid, afs_edit_dir_for_silly_1);
/* vfs_unlink and the like do not issue this when a file is
* sillyrenamed, so do it here.
*/
fsnotify_nameremove(old, 0);
}
_leave(" = %d", ret);
return ret;
}
/**
* afs_sillyrename - Perform a silly-rename of a dentry
*
* AFS is stateless and the server doesn't know when the client is holding a
* file open. To prevent application problems when a file is unlinked while
* it's still open, the client performs a "silly-rename". That is, it renames
* the file to a hidden file in the same directory, and only performs the
* unlink once the last reference to it is put.
*
* The final cleanup is done during dentry_iput.
*/
int afs_sillyrename(struct afs_vnode *dvnode, struct afs_vnode *vnode,
struct dentry *dentry, struct key *key)
{
static unsigned int sillycounter;
struct dentry *sdentry = NULL;
unsigned char silly[16];
int ret = -EBUSY;
_enter("");
/* We don't allow a dentry to be silly-renamed twice. */
if (dentry->d_flags & DCACHE_NFSFS_RENAMED)
return -EBUSY;
sdentry = NULL;
do {
int slen;
dput(sdentry);
sillycounter++;
/* Create a silly name. Note that the ".__afs" prefix is
* understood by the salvager and must not be changed.
*/
slen = scnprintf(silly, sizeof(silly), ".__afs%04X", sillycounter);
sdentry = lookup_one_len(silly, dentry->d_parent, slen);
/* N.B. Better to return EBUSY here ... it could be dangerous
* to delete the file while it's in use.
*/
if (IS_ERR(sdentry))
goto out;
} while (!d_is_negative(sdentry));
ihold(&vnode->vfs_inode);
ret = afs_do_silly_rename(dvnode, vnode, dentry, sdentry, key);
switch (ret) {
case 0:
/* The rename succeeded. */
d_move(dentry, sdentry);
break;
case -ERESTARTSYS:
/* The result of the rename is unknown. Play it safe by forcing
* a new lookup.
*/
d_drop(dentry);
d_drop(sdentry);
}
iput(&vnode->vfs_inode);
dput(sdentry);
out:
_leave(" = %d", ret);
return ret;
}
/*
* Tell the server to remove a sillyrename file.
*/
static int afs_do_silly_unlink(struct afs_vnode *dvnode, struct afs_vnode *vnode,
struct dentry *dentry, struct key *key)
{
struct afs_fs_cursor fc;
u64 dir_data_version = dvnode->status.data_version;
int ret = -ERESTARTSYS;
_enter("");
trace_afs_silly_rename(vnode, true);
if (afs_begin_vnode_operation(&fc, dvnode, key)) {
while (afs_select_fileserver(&fc)) {
fc.cb_break = afs_calc_vnode_cb_break(dvnode);
if (test_bit(AFS_SERVER_FL_IS_YFS, &fc.cbi->server->flags) &&
!test_bit(AFS_SERVER_FL_NO_RM2, &fc.cbi->server->flags)) {
yfs_fs_remove_file2(&fc, vnode, dentry->d_name.name,
dir_data_version);
if (fc.ac.error != -ECONNABORTED ||
fc.ac.abort_code != RXGEN_OPCODE)
continue;
set_bit(AFS_SERVER_FL_NO_RM2, &fc.cbi->server->flags);
}
afs_fs_remove(&fc, vnode, dentry->d_name.name, false,
dir_data_version);
}
afs_vnode_commit_status(&fc, dvnode, fc.cb_break);
ret = afs_end_vnode_operation(&fc);
if (ret == 0) {
drop_nlink(&vnode->vfs_inode);
if (vnode->vfs_inode.i_nlink == 0) {
set_bit(AFS_VNODE_DELETED, &vnode->flags);
clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags);
}
}
if (ret == 0 &&
test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags))
afs_edit_dir_remove(dvnode, &dentry->d_name,
afs_edit_dir_for_unlink);
}
_leave(" = %d", ret);
return ret;
}
/*
* Remove sillyrename file on iput.
*/
int afs_silly_iput(struct dentry *dentry, struct inode *inode)
{
struct afs_vnode *dvnode = AFS_FS_I(d_inode(dentry->d_parent));
struct afs_vnode *vnode = AFS_FS_I(inode);
struct dentry *alias;
int ret;
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
_enter("%p{%pd},%llx", dentry, dentry, vnode->fid.vnode);
down_read(&dvnode->rmdir_lock);
alias = d_alloc_parallel(dentry->d_parent, &dentry->d_name, &wq);
if (IS_ERR(alias)) {
up_read(&dvnode->rmdir_lock);
return 0;
}
if (!d_in_lookup(alias)) {
/* We raced with lookup... See if we need to transfer the
* sillyrename information to the aliased dentry.
*/
ret = 0;
spin_lock(&alias->d_lock);
if (d_really_is_positive(alias) &&
!(alias->d_flags & DCACHE_NFSFS_RENAMED)) {
alias->d_flags |= DCACHE_NFSFS_RENAMED;
ret = 1;
}
spin_unlock(&alias->d_lock);
up_read(&dvnode->rmdir_lock);
dput(alias);
return ret;
}
/* Stop lock-release from complaining. */
spin_lock(&vnode->lock);
vnode->lock_state = AFS_VNODE_LOCK_DELETED;
trace_afs_flock_ev(vnode, NULL, afs_flock_silly_delete, 0);
spin_unlock(&vnode->lock);
afs_do_silly_unlink(dvnode, vnode, dentry, dvnode->silly_key);
up_read(&dvnode->rmdir_lock);
d_lookup_done(alias);
dput(alias);
return 1;
}

616
fs/afs/flock.c
View File

@ -13,9 +13,11 @@
#define AFS_LOCK_GRANTED 0
#define AFS_LOCK_PENDING 1
#define AFS_LOCK_YOUR_TRY 2
struct workqueue_struct *afs_lock_manager;
static void afs_next_locker(struct afs_vnode *vnode, int error);
static void afs_fl_copy_lock(struct file_lock *new, struct file_lock *fl);
static void afs_fl_release_private(struct file_lock *fl);
@ -24,6 +26,14 @@ static const struct file_lock_operations afs_lock_ops = {
.fl_release_private = afs_fl_release_private,
};
static inline void afs_set_lock_state(struct afs_vnode *vnode, enum afs_lock_state state)
{
_debug("STATE %u -> %u", vnode->lock_state, state);
vnode->lock_state = state;
}
static atomic_t afs_file_lock_debug_id;
/*
* if the callback is broken on this vnode, then the lock may now be available
*/
@ -31,7 +41,14 @@ void afs_lock_may_be_available(struct afs_vnode *vnode)
{
_enter("{%llx:%llu}", vnode->fid.vid, vnode->fid.vnode);
queue_delayed_work(afs_lock_manager, &vnode->lock_work, 0);
if (vnode->lock_state != AFS_VNODE_LOCK_WAITING_FOR_CB)
return;
spin_lock(&vnode->lock);
if (vnode->lock_state == AFS_VNODE_LOCK_WAITING_FOR_CB)
afs_next_locker(vnode, 0);
trace_afs_flock_ev(vnode, NULL, afs_flock_callback_break, 0);
spin_unlock(&vnode->lock);
}
/*
@ -40,8 +57,35 @@ void afs_lock_may_be_available(struct afs_vnode *vnode)
*/
static void afs_schedule_lock_extension(struct afs_vnode *vnode)
{
queue_delayed_work(afs_lock_manager, &vnode->lock_work,
AFS_LOCKWAIT * HZ / 2);
ktime_t expires_at, now, duration;
u64 duration_j;
expires_at = ktime_add_ms(vnode->locked_at, AFS_LOCKWAIT * 1000 / 2);
now = ktime_get_real();
duration = ktime_sub(expires_at, now);
if (duration <= 0)
duration_j = 0;
else
duration_j = nsecs_to_jiffies(ktime_to_ns(duration));
queue_delayed_work(afs_lock_manager, &vnode->lock_work, duration_j);
}
/*
* In the case of successful completion of a lock operation, record the time
* the reply appeared and start the lock extension timer.
*/
void afs_lock_op_done(struct afs_call *call)
{
struct afs_vnode *vnode = call->reply[0];
if (call->error == 0) {
spin_lock(&vnode->lock);
trace_afs_flock_ev(vnode, NULL, afs_flock_timestamp, 0);
vnode->locked_at = call->reply_time;
afs_schedule_lock_extension(vnode);
spin_unlock(&vnode->lock);
}
}
/*
@ -49,24 +93,92 @@ static void afs_schedule_lock_extension(struct afs_vnode *vnode)
* first lock in the queue is itself a readlock)
* - the caller must hold the vnode lock
*/
static void afs_grant_locks(struct afs_vnode *vnode, struct file_lock *fl)
static void afs_grant_locks(struct afs_vnode *vnode)
{
struct file_lock *p, *_p;
bool exclusive = (vnode->lock_type == AFS_LOCK_WRITE);
list_move_tail(&fl->fl_u.afs.link, &vnode->granted_locks);
if (fl->fl_type == F_RDLCK) {
list_for_each_entry_safe(p, _p, &vnode->pending_locks,
fl_u.afs.link) {
if (p->fl_type == F_RDLCK) {
p->fl_u.afs.state = AFS_LOCK_GRANTED;
list_move_tail(&p->fl_u.afs.link,
&vnode->granted_locks);
wake_up(&p->fl_wait);
}
}
list_for_each_entry_safe(p, _p, &vnode->pending_locks, fl_u.afs.link) {
if (!exclusive && p->fl_type == F_WRLCK)
continue;
list_move_tail(&p->fl_u.afs.link, &vnode->granted_locks);
p->fl_u.afs.state = AFS_LOCK_GRANTED;
trace_afs_flock_op(vnode, p, afs_flock_op_grant);
wake_up(&p->fl_wait);
}
}
/*
* If an error is specified, reject every pending lock that matches the
* authentication and type of the lock we failed to get. If there are any
* remaining lockers, try to wake up one of them to have a go.
*/
static void afs_next_locker(struct afs_vnode *vnode, int error)
{
struct file_lock *p, *_p, *next = NULL;
struct key *key = vnode->lock_key;
unsigned int fl_type = F_RDLCK;
_enter("");
if (vnode->lock_type == AFS_LOCK_WRITE)
fl_type = F_WRLCK;
list_for_each_entry_safe(p, _p, &vnode->pending_locks, fl_u.afs.link) {
if (error &&
p->fl_type == fl_type &&
afs_file_key(p->fl_file) == key) {
list_del_init(&p->fl_u.afs.link);
p->fl_u.afs.state = error;
wake_up(&p->fl_wait);
}
/* Select the next locker to hand off to. */
if (next &&
(next->fl_type == F_WRLCK || p->fl_type == F_RDLCK))
continue;
next = p;
}
vnode->lock_key = NULL;
key_put(key);
if (next) {
afs_set_lock_state(vnode, AFS_VNODE_LOCK_SETTING);
next->fl_u.afs.state = AFS_LOCK_YOUR_TRY;
trace_afs_flock_op(vnode, next, afs_flock_op_wake);
wake_up(&next->fl_wait);
} else {
afs_set_lock_state(vnode, AFS_VNODE_LOCK_NONE);
trace_afs_flock_ev(vnode, NULL, afs_flock_no_lockers, 0);
}
_leave("");
}
/*
* Kill off all waiters in the the pending lock queue due to the vnode being
* deleted.
*/
static void afs_kill_lockers_enoent(struct afs_vnode *vnode)
{
struct file_lock *p;
afs_set_lock_state(vnode, AFS_VNODE_LOCK_DELETED);
while (!list_empty(&vnode->pending_locks)) {
p = list_entry(vnode->pending_locks.next,
struct file_lock, fl_u.afs.link);
list_del_init(&p->fl_u.afs.link);
p->fl_u.afs.state = -ENOENT;
wake_up(&p->fl_wait);
}
key_put(vnode->lock_key);
vnode->lock_key = NULL;
}
/*
* Get a lock on a file
*/
@ -170,8 +282,6 @@ void afs_lock_work(struct work_struct *work)
{
struct afs_vnode *vnode =
container_of(work, struct afs_vnode, lock_work.work);
struct file_lock *fl, *next;
afs_lock_type_t type;
struct key *key;
int ret;
@ -183,35 +293,28 @@ again:
_debug("wstate %u for %p", vnode->lock_state, vnode);
switch (vnode->lock_state) {
case AFS_VNODE_LOCK_NEED_UNLOCK:
_debug("unlock");
vnode->lock_state = AFS_VNODE_LOCK_UNLOCKING;
afs_set_lock_state(vnode, AFS_VNODE_LOCK_UNLOCKING);
trace_afs_flock_ev(vnode, NULL, afs_flock_work_unlocking, 0);
spin_unlock(&vnode->lock);
/* attempt to release the server lock; if it fails, we just
* wait 5 minutes and it'll expire anyway */
ret = afs_release_lock(vnode, vnode->lock_key);
if (ret < 0)
if (ret < 0 && vnode->lock_state != AFS_VNODE_LOCK_DELETED) {
trace_afs_flock_ev(vnode, NULL, afs_flock_release_fail,
ret);
printk(KERN_WARNING "AFS:"
" Failed to release lock on {%llx:%llx} error %d\n",
vnode->fid.vid, vnode->fid.vnode, ret);
spin_lock(&vnode->lock);
key_put(vnode->lock_key);
vnode->lock_key = NULL;
vnode->lock_state = AFS_VNODE_LOCK_NONE;
if (list_empty(&vnode->pending_locks)) {
spin_unlock(&vnode->lock);
return;
}
/* The new front of the queue now owns the state variables. */
next = list_entry(vnode->pending_locks.next,
struct file_lock, fl_u.afs.link);
vnode->lock_key = key_get(afs_file_key(next->fl_file));
vnode->lock_type = (next->fl_type == F_RDLCK) ? AFS_LOCK_READ : AFS_LOCK_WRITE;
vnode->lock_state = AFS_VNODE_LOCK_WAITING_FOR_CB;
goto again;
spin_lock(&vnode->lock);
if (ret == -ENOENT)
afs_kill_lockers_enoent(vnode);
else
afs_next_locker(vnode, 0);
spin_unlock(&vnode->lock);
return;
/* If we've already got a lock, then it must be time to extend that
* lock as AFS locks time out after 5 minutes.
@ -222,86 +325,55 @@ again:
ASSERT(!list_empty(&vnode->granted_locks));
key = key_get(vnode->lock_key);
vnode->lock_state = AFS_VNODE_LOCK_EXTENDING;
afs_set_lock_state(vnode, AFS_VNODE_LOCK_EXTENDING);
trace_afs_flock_ev(vnode, NULL, afs_flock_work_extending, 0);
spin_unlock(&vnode->lock);
ret = afs_extend_lock(vnode, key); /* RPC */
key_put(key);
if (ret < 0)
if (ret < 0) {
trace_afs_flock_ev(vnode, NULL, afs_flock_extend_fail,
ret);
pr_warning("AFS: Failed to extend lock on {%llx:%llx} error %d\n",
vnode->fid.vid, vnode->fid.vnode, ret);
}
spin_lock(&vnode->lock);
if (ret == -ENOENT) {
afs_kill_lockers_enoent(vnode);
spin_unlock(&vnode->lock);
return;
}
if (vnode->lock_state != AFS_VNODE_LOCK_EXTENDING)
goto again;
vnode->lock_state = AFS_VNODE_LOCK_GRANTED;
afs_set_lock_state(vnode, AFS_VNODE_LOCK_GRANTED);
if (ret == 0)
afs_schedule_lock_extension(vnode);
else
if (ret != 0)
queue_delayed_work(afs_lock_manager, &vnode->lock_work,
HZ * 10);
spin_unlock(&vnode->lock);
_leave(" [ext]");
return;
/* If we don't have a granted lock, then we must've been called
* back by the server, and so if might be possible to get a
* lock we're currently waiting for.
*/
/* If we're waiting for a callback to indicate lock release, we can't
* actually rely on this, so need to recheck at regular intervals. The
* problem is that the server might not notify us if the lock just
* expires (say because a client died) rather than being explicitly
* released.
*/
case AFS_VNODE_LOCK_WAITING_FOR_CB:
_debug("get");
key = key_get(vnode->lock_key);
type = vnode->lock_type;
vnode->lock_state = AFS_VNODE_LOCK_SETTING;
_debug("retry");
afs_next_locker(vnode, 0);
spin_unlock(&vnode->lock);
return;
ret = afs_set_lock(vnode, key, type); /* RPC */
key_put(key);
spin_lock(&vnode->lock);
switch (ret) {
case -EWOULDBLOCK:
_debug("blocked");
break;
case 0:
_debug("acquired");
vnode->lock_state = AFS_VNODE_LOCK_GRANTED;
/* Fall through */
default:
/* Pass the lock or the error onto the first locker in
* the list - if they're looking for this type of lock.
* If they're not, we assume that whoever asked for it
* took a signal.
*/
if (list_empty(&vnode->pending_locks)) {
_debug("withdrawn");
vnode->lock_state = AFS_VNODE_LOCK_NEED_UNLOCK;
goto again;
}
fl = list_entry(vnode->pending_locks.next,
struct file_lock, fl_u.afs.link);
type = (fl->fl_type == F_RDLCK) ? AFS_LOCK_READ : AFS_LOCK_WRITE;
if (vnode->lock_type != type) {
_debug("changed");
vnode->lock_state = AFS_VNODE_LOCK_NEED_UNLOCK;
goto again;
}
fl->fl_u.afs.state = ret;
if (ret == 0)
afs_grant_locks(vnode, fl);
else
list_del_init(&fl->fl_u.afs.link);
wake_up(&fl->fl_wait);
spin_unlock(&vnode->lock);
_leave(" [granted]");
return;
}
case AFS_VNODE_LOCK_DELETED:
afs_kill_lockers_enoent(vnode);
spin_unlock(&vnode->lock);
return;
/* Fall through */
default:
@ -320,14 +392,16 @@ again:
*/
static void afs_defer_unlock(struct afs_vnode *vnode)
{
_enter("");
_enter("%u", vnode->lock_state);
if (vnode->lock_state == AFS_VNODE_LOCK_GRANTED ||
vnode->lock_state == AFS_VNODE_LOCK_EXTENDING) {
if (list_empty(&vnode->granted_locks) &&
(vnode->lock_state == AFS_VNODE_LOCK_GRANTED ||
vnode->lock_state == AFS_VNODE_LOCK_EXTENDING)) {
cancel_delayed_work(&vnode->lock_work);
vnode->lock_state = AFS_VNODE_LOCK_NEED_UNLOCK;
afs_lock_may_be_available(vnode);
afs_set_lock_state(vnode, AFS_VNODE_LOCK_NEED_UNLOCK);
trace_afs_flock_ev(vnode, NULL, afs_flock_defer_unlock, 0);
queue_delayed_work(afs_lock_manager, &vnode->lock_work, 0);
}
}
@ -336,7 +410,7 @@ static void afs_defer_unlock(struct afs_vnode *vnode)
* whether we think that we have a locking permit.
*/
static int afs_do_setlk_check(struct afs_vnode *vnode, struct key *key,
afs_lock_type_t type, bool can_sleep)
enum afs_flock_mode mode, afs_lock_type_t type)
{
afs_access_t access;
int ret;
@ -364,62 +438,14 @@ static int afs_do_setlk_check(struct afs_vnode *vnode, struct key *key,
if (type == AFS_LOCK_READ) {
if (!(access & (AFS_ACE_INSERT | AFS_ACE_WRITE | AFS_ACE_LOCK)))
return -EACCES;
if (vnode->status.lock_count == -1 && !can_sleep)
return -EAGAIN; /* Write locked */
} else {
if (!(access & (AFS_ACE_INSERT | AFS_ACE_WRITE)))
return -EACCES;
if (vnode->status.lock_count != 0 && !can_sleep)
return -EAGAIN; /* Locked */
}
return 0;
}
/*
* Remove the front runner from the pending queue.
* - The caller must hold vnode->lock.
*/
static void afs_dequeue_lock(struct afs_vnode *vnode, struct file_lock *fl)
{
struct file_lock *next;
_enter("");
/* ->lock_type, ->lock_key and ->lock_state only belong to this
* file_lock if we're at the front of the pending queue or if we have
* the lock granted or if the lock_state is NEED_UNLOCK or UNLOCKING.
*/
if (vnode->granted_locks.next == &fl->fl_u.afs.link &&
vnode->granted_locks.prev == &fl->fl_u.afs.link) {
list_del_init(&fl->fl_u.afs.link);
afs_defer_unlock(vnode);
return;
}
if (!list_empty(&vnode->granted_locks) ||
vnode->pending_locks.next != &fl->fl_u.afs.link) {
list_del_init(&fl->fl_u.afs.link);
return;
}
list_del_init(&fl->fl_u.afs.link);
key_put(vnode->lock_key);
vnode->lock_key = NULL;
vnode->lock_state = AFS_VNODE_LOCK_NONE;
if (list_empty(&vnode->pending_locks))
return;
/* The new front of the queue now owns the state variables. */
next = list_entry(vnode->pending_locks.next,
struct file_lock, fl_u.afs.link);
vnode->lock_key = key_get(afs_file_key(next->fl_file));
vnode->lock_type = (next->fl_type == F_RDLCK) ? AFS_LOCK_READ : AFS_LOCK_WRITE;
vnode->lock_state = AFS_VNODE_LOCK_WAITING_FOR_CB;
afs_lock_may_be_available(vnode);
}
/*
* request a lock on a file on the server
*/
@ -427,97 +453,162 @@ static int afs_do_setlk(struct file *file, struct file_lock *fl)
{
struct inode *inode = locks_inode(file);
struct afs_vnode *vnode = AFS_FS_I(inode);
enum afs_flock_mode mode = AFS_FS_S(inode->i_sb)->flock_mode;
afs_lock_type_t type;
struct key *key = afs_file_key(file);
bool partial, no_server_lock = false;
int ret;
_enter("{%llx:%llu},%u", vnode->fid.vid, vnode->fid.vnode, fl->fl_type);
if (mode == afs_flock_mode_unset)
mode = afs_flock_mode_openafs;
/* only whole-file locks are supported */
if (fl->fl_start != 0 || fl->fl_end != OFFSET_MAX)
return -EINVAL;
_enter("{%llx:%llu},%llu-%llu,%u,%u",
vnode->fid.vid, vnode->fid.vnode,
fl->fl_start, fl->fl_end, fl->fl_type, mode);
fl->fl_ops = &afs_lock_ops;
INIT_LIST_HEAD(&fl->fl_u.afs.link);
fl->fl_u.afs.state = AFS_LOCK_PENDING;
partial = (fl->fl_start != 0 || fl->fl_end != OFFSET_MAX);
type = (fl->fl_type == F_RDLCK) ? AFS_LOCK_READ : AFS_LOCK_WRITE;
if (mode == afs_flock_mode_write && partial)
type = AFS_LOCK_WRITE;
ret = afs_do_setlk_check(vnode, key, type, fl->fl_flags & FL_SLEEP);
ret = afs_do_setlk_check(vnode, key, mode, type);
if (ret < 0)
return ret;
spin_lock(&vnode->lock);
trace_afs_flock_op(vnode, fl, afs_flock_op_set_lock);
/* If we've already got a readlock on the server then we instantly
* grant another readlock, irrespective of whether there are any
* pending writelocks.
/* AFS3 protocol only supports full-file locks and doesn't provide any
* method of upgrade/downgrade, so we need to emulate for partial-file
* locks.
*
* The OpenAFS client only gets a server lock for a full-file lock and
* keeps partial-file locks local. Allow this behaviour to be emulated
* (as the default).
*/
if (type == AFS_LOCK_READ &&
vnode->lock_state == AFS_VNODE_LOCK_GRANTED &&
vnode->lock_type == AFS_LOCK_READ) {
_debug("instant readlock");
ASSERT(!list_empty(&vnode->granted_locks));
goto share_existing_lock;
if (mode == afs_flock_mode_local ||
(partial && mode == afs_flock_mode_openafs)) {
no_server_lock = true;
goto skip_server_lock;
}
spin_lock(&vnode->lock);
list_add_tail(&fl->fl_u.afs.link, &vnode->pending_locks);
ret = -ENOENT;
if (vnode->lock_state == AFS_VNODE_LOCK_DELETED)
goto error_unlock;
/* If we've already got a lock on the server then try to move to having
* the VFS grant the requested lock. Note that this means that other
* clients may get starved out.
*/
_debug("try %u", vnode->lock_state);
if (vnode->lock_state == AFS_VNODE_LOCK_GRANTED) {
if (type == AFS_LOCK_READ) {
_debug("instant readlock");
list_move_tail(&fl->fl_u.afs.link, &vnode->granted_locks);
fl->fl_u.afs.state = AFS_LOCK_GRANTED;
goto vnode_is_locked_u;
}
if (vnode->lock_type == AFS_LOCK_WRITE) {
_debug("instant writelock");
list_move_tail(&fl->fl_u.afs.link, &vnode->granted_locks);
fl->fl_u.afs.state = AFS_LOCK_GRANTED;
goto vnode_is_locked_u;
}
}
if (vnode->lock_state == AFS_VNODE_LOCK_NONE &&
!(fl->fl_flags & FL_SLEEP)) {
ret = -EAGAIN;
if (type == AFS_LOCK_READ) {
if (vnode->status.lock_count == -1)
goto lock_is_contended; /* Write locked */
} else {
if (vnode->status.lock_count != 0)
goto lock_is_contended; /* Locked */
}
}
if (vnode->lock_state != AFS_VNODE_LOCK_NONE)
goto need_to_wait;
try_to_lock:
/* We don't have a lock on this vnode and we aren't currently waiting
* for one either, so ask the server for a lock.
*
* Note that we need to be careful if we get interrupted by a signal
* after dispatching the request as we may still get the lock, even
* though we don't wait for the reply (it's not too bad a problem - the
* lock will expire in 10 mins anyway).
* lock will expire in 5 mins anyway).
*/
_debug("not locked");
trace_afs_flock_ev(vnode, fl, afs_flock_try_to_lock, 0);
vnode->lock_key = key_get(key);
vnode->lock_type = type;
vnode->lock_state = AFS_VNODE_LOCK_SETTING;
afs_set_lock_state(vnode, AFS_VNODE_LOCK_SETTING);
spin_unlock(&vnode->lock);
ret = afs_set_lock(vnode, key, type); /* RPC */
spin_lock(&vnode->lock);
switch (ret) {
case -EKEYREJECTED:
case -EKEYEXPIRED:
case -EKEYREVOKED:
case -EPERM:
case -EACCES:
fl->fl_u.afs.state = ret;
trace_afs_flock_ev(vnode, fl, afs_flock_fail_perm, ret);
list_del_init(&fl->fl_u.afs.link);
afs_next_locker(vnode, ret);
goto error_unlock;
case -ENOENT:
fl->fl_u.afs.state = ret;
trace_afs_flock_ev(vnode, fl, afs_flock_fail_other, ret);
list_del_init(&fl->fl_u.afs.link);
afs_kill_lockers_enoent(vnode);
goto error_unlock;
default:
goto abort_attempt;
fl->fl_u.afs.state = ret;
trace_afs_flock_ev(vnode, fl, afs_flock_fail_other, ret);
list_del_init(&fl->fl_u.afs.link);
afs_next_locker(vnode, 0);
goto error_unlock;
case -EWOULDBLOCK:
/* The server doesn't have a lock-waiting queue, so the client
* will have to retry. The server will break the outstanding
* callbacks on a file when a lock is released.
*/
_debug("would block");
ASSERT(list_empty(&vnode->granted_locks));
ASSERTCMP(vnode->pending_locks.next, ==, &fl->fl_u.afs.link);
vnode->lock_state = AFS_VNODE_LOCK_WAITING_FOR_CB;
goto need_to_wait;
goto lock_is_contended;
case 0:
_debug("acquired");
break;
afs_set_lock_state(vnode, AFS_VNODE_LOCK_GRANTED);
trace_afs_flock_ev(vnode, fl, afs_flock_acquired, type);
afs_grant_locks(vnode);
goto vnode_is_locked_u;
}
/* we've acquired a server lock, but it needs to be renewed after 5
* mins */
vnode->lock_state = AFS_VNODE_LOCK_GRANTED;
afs_schedule_lock_extension(vnode);
share_existing_lock:
/* the lock has been granted as far as we're concerned... */
fl->fl_u.afs.state = AFS_LOCK_GRANTED;
list_move_tail(&fl->fl_u.afs.link, &vnode->granted_locks);
given_lock:
/* ... but we do still need to get the VFS's blessing */
vnode_is_locked_u:
spin_unlock(&vnode->lock);
vnode_is_locked:
/* the lock has been granted by the server... */
ASSERTCMP(fl->fl_u.afs.state, ==, AFS_LOCK_GRANTED);
ret = posix_lock_file(file, fl, NULL);
skip_server_lock:
/* ... but the VFS still needs to distribute access on this client. */
trace_afs_flock_ev(vnode, fl, afs_flock_vfs_locking, 0);
ret = locks_lock_file_wait(file, fl);
trace_afs_flock_ev(vnode, fl, afs_flock_vfs_lock, ret);
if (ret < 0)
goto vfs_rejected_lock;
@ -529,38 +620,62 @@ given_lock:
_leave(" = 0");
return 0;
lock_is_contended:
if (!(fl->fl_flags & FL_SLEEP)) {
list_del_init(&fl->fl_u.afs.link);
afs_next_locker(vnode, 0);
ret = -EAGAIN;
goto error_unlock;
}
afs_set_lock_state(vnode, AFS_VNODE_LOCK_WAITING_FOR_CB);
trace_afs_flock_ev(vnode, fl, afs_flock_would_block, ret);
queue_delayed_work(afs_lock_manager, &vnode->lock_work, HZ * 5);
need_to_wait:
/* We're going to have to wait. Either this client doesn't have a lock
* on the server yet and we need to wait for a callback to occur, or
* the client does have a lock on the server, but it belongs to some
* other process(es) and is incompatible with the lock we want.
* the client does have a lock on the server, but it's shared and we
* need an exclusive lock.
*/
ret = -EAGAIN;
if (fl->fl_flags & FL_SLEEP) {
spin_unlock(&vnode->lock);
spin_unlock(&vnode->lock);
_debug("sleep");
ret = wait_event_interruptible(fl->fl_wait,
fl->fl_u.afs.state != AFS_LOCK_PENDING);
trace_afs_flock_ev(vnode, fl, afs_flock_waiting, 0);
ret = wait_event_interruptible(fl->fl_wait,
fl->fl_u.afs.state != AFS_LOCK_PENDING);
trace_afs_flock_ev(vnode, fl, afs_flock_waited, ret);
if (fl->fl_u.afs.state >= 0 && fl->fl_u.afs.state != AFS_LOCK_GRANTED) {
spin_lock(&vnode->lock);
switch (fl->fl_u.afs.state) {
case AFS_LOCK_YOUR_TRY:
fl->fl_u.afs.state = AFS_LOCK_PENDING;
goto try_to_lock;
case AFS_LOCK_PENDING:
if (ret > 0) {
/* We need to retry the lock. We may not be
* notified by the server if it just expired
* rather than being released.
*/
ASSERTCMP(vnode->lock_state, ==, AFS_VNODE_LOCK_WAITING_FOR_CB);
afs_set_lock_state(vnode, AFS_VNODE_LOCK_SETTING);
fl->fl_u.afs.state = AFS_LOCK_PENDING;
goto try_to_lock;
}
goto error_unlock;
case AFS_LOCK_GRANTED:
default:
break;
}
spin_unlock(&vnode->lock);
}
if (fl->fl_u.afs.state == AFS_LOCK_GRANTED)
goto given_lock;
if (fl->fl_u.afs.state < 0)
ret = fl->fl_u.afs.state;
abort_attempt:
/* we aren't going to get the lock, either because we're unwilling to
* wait, or because some signal happened */
_debug("abort");
afs_dequeue_lock(vnode, fl);
error_unlock:
spin_unlock(&vnode->lock);
_leave(" = %d", ret);
return ret;
goto vnode_is_locked;
ret = fl->fl_u.afs.state;
goto error;
vfs_rejected_lock:
/* The VFS rejected the lock we just obtained, so we have to discard
@ -568,11 +683,17 @@ vfs_rejected_lock:
* deal with.
*/
_debug("vfs refused %d", ret);
if (no_server_lock)
goto error;
spin_lock(&vnode->lock);
list_del_init(&fl->fl_u.afs.link);
if (list_empty(&vnode->granted_locks))
afs_defer_unlock(vnode);
goto error_unlock;
afs_defer_unlock(vnode);
error_unlock:
spin_unlock(&vnode->lock);
error:
_leave(" = %d", ret);
return ret;
}
/*
@ -585,14 +706,12 @@ static int afs_do_unlk(struct file *file, struct file_lock *fl)
_enter("{%llx:%llu},%u", vnode->fid.vid, vnode->fid.vnode, fl->fl_type);
trace_afs_flock_op(vnode, fl, afs_flock_op_unlock);
/* Flush all pending writes before doing anything with locks. */
vfs_fsync(file, 0);
/* only whole-file unlocks are supported */
if (fl->fl_start != 0 || fl->fl_end != OFFSET_MAX)
return -EINVAL;
ret = posix_lock_file(file, fl, NULL);
ret = locks_lock_file_wait(file, fl);
_leave(" = %d [%u]", ret, vnode->lock_state);
return ret;
}
@ -608,6 +727,9 @@ static int afs_do_getlk(struct file *file, struct file_lock *fl)
_enter("");
if (vnode->lock_state == AFS_VNODE_LOCK_DELETED)
return -ENOENT;
fl->fl_type = F_UNLCK;
/* check local lock records first */
@ -619,12 +741,15 @@ static int afs_do_getlk(struct file *file, struct file_lock *fl)
goto error;
lock_count = READ_ONCE(vnode->status.lock_count);
if (lock_count > 0)
fl->fl_type = F_RDLCK;
else
fl->fl_type = F_WRLCK;
fl->fl_start = 0;
fl->fl_end = OFFSET_MAX;
if (lock_count != 0) {
if (lock_count > 0)
fl->fl_type = F_RDLCK;
else
fl->fl_type = F_WRLCK;
fl->fl_start = 0;
fl->fl_end = OFFSET_MAX;
fl->fl_pid = 0;
}
}
ret = 0;
@ -639,6 +764,8 @@ error:
int afs_lock(struct file *file, int cmd, struct file_lock *fl)
{
struct afs_vnode *vnode = AFS_FS_I(locks_inode(file));
enum afs_flock_operation op;
int ret;
_enter("{%llx:%llu},%d,{t=%x,fl=%x,r=%Ld:%Ld}",
vnode->fid.vid, vnode->fid.vnode, cmd,
@ -651,9 +778,23 @@ int afs_lock(struct file *file, int cmd, struct file_lock *fl)
if (IS_GETLK(cmd))
return afs_do_getlk(file, fl);
fl->fl_u.afs.debug_id = atomic_inc_return(&afs_file_lock_debug_id);
trace_afs_flock_op(vnode, fl, afs_flock_op_lock);
if (fl->fl_type == F_UNLCK)
return afs_do_unlk(file, fl);
return afs_do_setlk(file, fl);
ret = afs_do_unlk(file, fl);
else
ret = afs_do_setlk(file, fl);
switch (ret) {
case 0: op = afs_flock_op_return_ok; break;
case -EAGAIN: op = afs_flock_op_return_eagain; break;
case -EDEADLK: op = afs_flock_op_return_edeadlk; break;
default: op = afs_flock_op_return_error; break;
}
trace_afs_flock_op(vnode, fl, op);
return ret;
}
/*
@ -662,6 +803,8 @@ int afs_lock(struct file *file, int cmd, struct file_lock *fl)
int afs_flock(struct file *file, int cmd, struct file_lock *fl)
{
struct afs_vnode *vnode = AFS_FS_I(locks_inode(file));
enum afs_flock_operation op;
int ret;
_enter("{%llx:%llu},%d,{t=%x,fl=%x}",
vnode->fid.vid, vnode->fid.vnode, cmd,
@ -677,10 +820,23 @@ int afs_flock(struct file *file, int cmd, struct file_lock *fl)
if (!(fl->fl_flags & FL_FLOCK))
return -ENOLCK;
fl->fl_u.afs.debug_id = atomic_inc_return(&afs_file_lock_debug_id);
trace_afs_flock_op(vnode, fl, afs_flock_op_flock);
/* we're simulating flock() locks using posix locks on the server */
if (fl->fl_type == F_UNLCK)
return afs_do_unlk(file, fl);
return afs_do_setlk(file, fl);
ret = afs_do_unlk(file, fl);
else
ret = afs_do_setlk(file, fl);
switch (ret) {
case 0: op = afs_flock_op_return_ok; break;
case -EAGAIN: op = afs_flock_op_return_eagain; break;
case -EDEADLK: op = afs_flock_op_return_edeadlk; break;
default: op = afs_flock_op_return_error; break;
}
trace_afs_flock_op(vnode, fl, op);
return ret;
}
/*
@ -695,7 +851,10 @@ static void afs_fl_copy_lock(struct file_lock *new, struct file_lock *fl)
_enter("");
new->fl_u.afs.debug_id = atomic_inc_return(&afs_file_lock_debug_id);
spin_lock(&vnode->lock);
trace_afs_flock_op(vnode, new, afs_flock_op_copy_lock);
list_add(&new->fl_u.afs.link, &fl->fl_u.afs.link);
spin_unlock(&vnode->lock);
}
@ -711,7 +870,12 @@ static void afs_fl_release_private(struct file_lock *fl)
_enter("");
spin_lock(&vnode->lock);
afs_dequeue_lock(vnode, fl);
trace_afs_flock_op(vnode, fl, afs_flock_op_release_lock);
list_del_init(&fl->fl_u.afs.link);
if (list_empty(&vnode->granted_locks))
afs_defer_unlock(vnode);
_debug("state %u for %p", vnode->lock_state, vnode);
spin_unlock(&vnode->lock);
}

13
fs/afs/fs_probe.c
View File

@ -141,8 +141,8 @@ static int afs_do_probe_fileserver(struct afs_net *net,
struct afs_addr_cursor ac = {
.index = 0,
};
struct afs_call *call;
bool in_progress = false;
int err;
_enter("%pU", &server->uuid);
@ -156,12 +156,13 @@ static int afs_do_probe_fileserver(struct afs_net *net,
server->probe.rtt = UINT_MAX;
for (ac.index = 0; ac.index < ac.alist->nr_addrs; ac.index++) {
err = afs_fs_get_capabilities(net, server, &ac, key, server_index,
true);
if (err == -EINPROGRESS)
call = afs_fs_get_capabilities(net, server, &ac, key, server_index);
if (!IS_ERR(call)) {
afs_put_call(call);
in_progress = true;
else
afs_prioritise_error(_e, err, ac.abort_code);
} else {
afs_prioritise_error(_e, PTR_ERR(call), ac.abort_code);
}
}
if (!in_progress)

277
fs/afs/fsclient.c
View File

@ -468,7 +468,9 @@ int afs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_volsync *volsy
call->cb_break = fc->cb_break;
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -662,7 +664,8 @@ static int afs_fs_fetch_data64(struct afs_fs_cursor *fc, struct afs_read *req)
call->cb_break = fc->cb_break;
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -709,7 +712,8 @@ int afs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_read *req)
call->cb_break = fc->cb_break;
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -828,14 +832,16 @@ int afs_fs_create(struct afs_fs_cursor *fc,
*bp++ = 0; /* segment size */
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
trace_afs_make_fs_call1(call, &vnode->fid, name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* deliver reply data to an FS.RemoveFile or FS.RemoveDir
* Deliver reply data to any operation that returns file status and volume
* sync.
*/
static int afs_deliver_fs_remove(struct afs_call *call)
static int afs_deliver_fs_status_and_vol(struct afs_call *call)
{
struct afs_vnode *vnode = call->reply[0];
const __be32 *bp;
@ -865,14 +871,14 @@ static int afs_deliver_fs_remove(struct afs_call *call)
static const struct afs_call_type afs_RXFSRemoveFile = {
.name = "FS.RemoveFile",
.op = afs_FS_RemoveFile,
.deliver = afs_deliver_fs_remove,
.deliver = afs_deliver_fs_status_and_vol,
.destructor = afs_flat_call_destructor,
};
static const struct afs_call_type afs_RXFSRemoveDir = {
.name = "FS.RemoveDir",
.op = afs_FS_RemoveDir,
.deliver = afs_deliver_fs_remove,
.deliver = afs_deliver_fs_status_and_vol,
.destructor = afs_flat_call_destructor,
};
@ -923,8 +929,9 @@ int afs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
}
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &dvnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
trace_afs_make_fs_call1(call, &dvnode->fid, name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1015,8 +1022,9 @@ int afs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
*bp++ = htonl(vnode->fid.unique);
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
trace_afs_make_fs_call1(call, &vnode->fid, name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1129,8 +1137,9 @@ int afs_fs_symlink(struct afs_fs_cursor *fc,
*bp++ = 0; /* segment size */
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
trace_afs_make_fs_call1(call, &vnode->fid, name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1247,8 +1256,9 @@ int afs_fs_rename(struct afs_fs_cursor *fc,
}
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &orig_dvnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
trace_afs_make_fs_call2(call, &orig_dvnode->fid, orig_name, new_name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1352,7 +1362,8 @@ static int afs_fs_store_data64(struct afs_fs_cursor *fc,
*bp++ = htonl((u32) i_size);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1428,7 +1439,8 @@ int afs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1526,7 +1538,8 @@ static int afs_fs_setattr_size64(struct afs_fs_cursor *fc, struct iattr *attr)
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1572,7 +1585,8 @@ static int afs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr)
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1616,7 +1630,8 @@ int afs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr)
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1800,7 +1815,8 @@ int afs_fs_get_volume_status(struct afs_fs_cursor *fc,
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1832,6 +1848,7 @@ static const struct afs_call_type afs_RXFSSetLock = {
.name = "FS.SetLock",
.op = afs_FS_SetLock,
.deliver = afs_deliver_fs_xxxx_lock,
.done = afs_lock_op_done,
.destructor = afs_flat_call_destructor,
};
@ -1842,6 +1859,7 @@ static const struct afs_call_type afs_RXFSExtendLock = {
.name = "FS.ExtendLock",
.op = afs_FS_ExtendLock,
.deliver = afs_deliver_fs_xxxx_lock,
.done = afs_lock_op_done,
.destructor = afs_flat_call_destructor,
};
@ -1876,6 +1894,7 @@ int afs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type)
call->key = fc->key;
call->reply[0] = vnode;
call->want_reply_time = true;
/* marshall the parameters */
bp = call->request;
@ -1886,8 +1905,9 @@ int afs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type)
*bp++ = htonl(type);
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
trace_afs_make_fs_calli(call, &vnode->fid, type);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1911,6 +1931,7 @@ int afs_fs_extend_lock(struct afs_fs_cursor *fc)
call->key = fc->key;
call->reply[0] = vnode;
call->want_reply_time = true;
/* marshall the parameters */
bp = call->request;
@ -1921,7 +1942,8 @@ int afs_fs_extend_lock(struct afs_fs_cursor *fc)
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1955,7 +1977,8 @@ int afs_fs_release_lock(struct afs_fs_cursor *fc)
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -2000,7 +2023,8 @@ int afs_fs_give_up_all_callbacks(struct afs_net *net,
*bp++ = htonl(FSGIVEUPALLCALLBACKS);
/* Can't take a ref on server */
return afs_make_call(ac, call, GFP_NOFS, false);
afs_make_call(ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, ac);
}
/*
@ -2070,12 +2094,11 @@ static const struct afs_call_type afs_RXFSGetCapabilities = {
* Probe a fileserver for the capabilities that it supports. This can
* return up to 196 words.
*/
int afs_fs_get_capabilities(struct afs_net *net,
struct afs_server *server,
struct afs_addr_cursor *ac,
struct key *key,
unsigned int server_index,
bool async)
struct afs_call *afs_fs_get_capabilities(struct afs_net *net,
struct afs_server *server,
struct afs_addr_cursor *ac,
struct key *key,
unsigned int server_index)
{
struct afs_call *call;
__be32 *bp;
@ -2084,13 +2107,14 @@ int afs_fs_get_capabilities(struct afs_net *net,
call = afs_alloc_flat_call(net, &afs_RXFSGetCapabilities, 1 * 4, 16 * 4);
if (!call)
return -ENOMEM;
return ERR_PTR(-ENOMEM);
call->key = key;
call->reply[0] = afs_get_server(server);
call->reply[1] = (void *)(long)server_index;
call->upgrade = true;
call->want_reply_time = true;
call->async = true;
/* marshall the parameters */
bp = call->request;
@ -2098,7 +2122,8 @@ int afs_fs_get_capabilities(struct afs_net *net,
/* Can't take a ref on server */
trace_afs_make_fs_call(call, NULL);
return afs_make_call(ac, call, GFP_NOFS, async);
afs_make_call(ac, call, GFP_NOFS);
return call;
}
/*
@ -2185,7 +2210,8 @@ int afs_fs_fetch_status(struct afs_fs_cursor *fc,
call->cb_break = fc->cb_break;
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -2370,5 +2396,180 @@ int afs_fs_inline_bulk_status(struct afs_fs_cursor *fc,
call->cb_break = fc->cb_break;
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &fids[0]);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* deliver reply data to an FS.FetchACL
*/
static int afs_deliver_fs_fetch_acl(struct afs_call *call)
{
struct afs_vnode *vnode = call->reply[1];
struct afs_acl *acl;
const __be32 *bp;
unsigned int size;
int ret;
_enter("{%u}", call->unmarshall);
switch (call->unmarshall) {
case 0:
afs_extract_to_tmp(call);
call->unmarshall++;
/* extract the returned data length */
case 1:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
size = call->count2 = ntohl(call->tmp);
size = round_up(size, 4);
acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
if (!acl)
return -ENOMEM;
call->reply[0] = acl;
acl->size = call->count2;
afs_extract_begin(call, acl->data, size);
call->unmarshall++;
/* extract the returned data */
case 2:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
afs_extract_to_buf(call, (21 + 6) * 4);
call->unmarshall++;
/* extract the metadata */
case 3:
ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
bp = call->buffer;
ret = afs_decode_status(call, &bp, &vnode->status, vnode,
&vnode->status.data_version, NULL);
if (ret < 0)
return ret;
xdr_decode_AFSVolSync(&bp, call->reply[2]);
call->unmarshall++;
case 4:
break;
}
_leave(" = 0 [done]");
return 0;
}
static void afs_destroy_fs_fetch_acl(struct afs_call *call)
{
kfree(call->reply[0]);
afs_flat_call_destructor(call);
}
/*
* FS.FetchACL operation type
*/
static const struct afs_call_type afs_RXFSFetchACL = {
.name = "FS.FetchACL",
.op = afs_FS_FetchACL,
.deliver = afs_deliver_fs_fetch_acl,
.destructor = afs_destroy_fs_fetch_acl,
};
/*
* Fetch the ACL for a file.
*/
struct afs_acl *afs_fs_fetch_acl(struct afs_fs_cursor *fc)
{
struct afs_vnode *vnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(vnode);
__be32 *bp;
_enter(",%x,{%llx:%llu},,",
key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
call = afs_alloc_flat_call(net, &afs_RXFSFetchACL, 16, (21 + 6) * 4);
if (!call) {
fc->ac.error = -ENOMEM;
return ERR_PTR(-ENOMEM);
}
call->key = fc->key;
call->reply[0] = NULL;
call->reply[1] = vnode;
call->reply[2] = NULL; /* volsync */
call->ret_reply0 = true;
/* marshall the parameters */
bp = call->request;
bp[0] = htonl(FSFETCHACL);
bp[1] = htonl(vnode->fid.vid);
bp[2] = htonl(vnode->fid.vnode);
bp[3] = htonl(vnode->fid.unique);
call->cb_break = fc->cb_break;
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
afs_make_call(&fc->ac, call, GFP_KERNEL);
return (struct afs_acl *)afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* FS.StoreACL operation type
*/
static const struct afs_call_type afs_RXFSStoreACL = {
.name = "FS.StoreACL",
.op = afs_FS_StoreACL,
.deliver = afs_deliver_fs_status_and_vol,
.destructor = afs_flat_call_destructor,
};
/*
* Fetch the ACL for a file.
*/
int afs_fs_store_acl(struct afs_fs_cursor *fc, const struct afs_acl *acl)
{
struct afs_vnode *vnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(vnode);
size_t size;
__be32 *bp;
_enter(",%x,{%llx:%llu},,",
key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
size = round_up(acl->size, 4);
call = afs_alloc_flat_call(net, &afs_RXFSStoreACL,
5 * 4 + size, (21 + 6) * 4);
if (!call) {
fc->ac.error = -ENOMEM;
return -ENOMEM;
}
call->key = fc->key;
call->reply[0] = vnode;
call->reply[2] = NULL; /* volsync */
/* marshall the parameters */
bp = call->request;
bp[0] = htonl(FSSTOREACL);
bp[1] = htonl(vnode->fid.vid);
bp[2] = htonl(vnode->fid.vnode);
bp[3] = htonl(vnode->fid.unique);
bp[4] = htonl(acl->size);
memcpy(&bp[5], acl->data, acl->size);
if (acl->size != size)
memset((void *)&bp[5] + acl->size, 0, size - acl->size);
trace_afs_make_fs_call(call, &vnode->fid);
afs_make_call(&fc->ac, call, GFP_KERNEL);
return afs_wait_for_call_to_complete(call, &fc->ac);
}

43
fs/afs/inode.c
View File

@ -29,10 +29,36 @@ static const struct inode_operations afs_symlink_inode_operations = {
.listxattr = afs_listxattr,
};
static noinline void dump_vnode(struct afs_vnode *vnode, struct afs_vnode *parent_vnode)
{
static unsigned long once_only;
pr_warn("kAFS: AFS vnode with undefined type %u\n",
vnode->status.type);
pr_warn("kAFS: A=%d m=%o s=%llx v=%llx\n",
vnode->status.abort_code,
vnode->status.mode,
vnode->status.size,
vnode->status.data_version);
pr_warn("kAFS: vnode %llx:%llx:%x\n",
vnode->fid.vid,
vnode->fid.vnode,
vnode->fid.unique);
if (parent_vnode)
pr_warn("kAFS: dir %llx:%llx:%x\n",
parent_vnode->fid.vid,
parent_vnode->fid.vnode,
parent_vnode->fid.unique);
if (!test_and_set_bit(0, &once_only))
dump_stack();
}
/*
* Initialise an inode from the vnode status.
*/
static int afs_inode_init_from_status(struct afs_vnode *vnode, struct key *key)
static int afs_inode_init_from_status(struct afs_vnode *vnode, struct key *key,
struct afs_vnode *parent_vnode)
{
struct inode *inode = AFS_VNODE_TO_I(vnode);
@ -80,12 +106,16 @@ static int afs_inode_init_from_status(struct afs_vnode *vnode, struct key *key)
inode_nohighmem(inode);
break;
default:
printk("kAFS: AFS vnode with undefined type\n");
dump_vnode(vnode, parent_vnode);
read_sequnlock_excl(&vnode->cb_lock);
return afs_protocol_error(NULL, -EBADMSG, afs_eproto_file_type);
}
inode->i_blocks = 0;
/*
* Estimate 512 bytes blocks used, rounded up to nearest 1K
* for consistency with other AFS clients.
*/
inode->i_blocks = ((i_size_read(inode) + 1023) >> 10) << 1;
vnode->invalid_before = vnode->status.data_version;
read_sequnlock_excl(&vnode->cb_lock);
@ -270,7 +300,8 @@ static void afs_get_inode_cache(struct afs_vnode *vnode)
*/
struct inode *afs_iget(struct super_block *sb, struct key *key,
struct afs_fid *fid, struct afs_file_status *status,
struct afs_callback *cb, struct afs_cb_interest *cbi)
struct afs_callback *cb, struct afs_cb_interest *cbi,
struct afs_vnode *parent_vnode)
{
struct afs_iget_data data = { .fid = *fid };
struct afs_super_info *as;
@ -327,7 +358,7 @@ struct inode *afs_iget(struct super_block *sb, struct key *key,
vnode->cb_expires_at += ktime_get_real_seconds();
}
ret = afs_inode_init_from_status(vnode, key);
ret = afs_inode_init_from_status(vnode, key, parent_vnode);
if (ret < 0)
goto bad_inode;
@ -543,6 +574,8 @@ void afs_evict_inode(struct inode *inode)
#endif
afs_put_permits(rcu_access_pointer(vnode->permit_cache));
key_put(vnode->silly_key);
vnode->silly_key = NULL;
key_put(vnode->lock_key);
vnode->lock_key = NULL;
_leave("");

64
fs/afs/internal.h
View File

@ -36,11 +36,24 @@
struct pagevec;
struct afs_call;
/*
* Partial file-locking emulation mode. (The problem being that AFS3 only
* allows whole-file locks and no upgrading/downgrading).
*/
enum afs_flock_mode {
afs_flock_mode_unset,
afs_flock_mode_local, /* Local locking only */
afs_flock_mode_openafs, /* Don't get server lock for a partial lock */
afs_flock_mode_strict, /* Always get a server lock for a partial lock */
afs_flock_mode_write, /* Get an exclusive server lock for a partial lock */
};
struct afs_fs_context {
bool force; /* T to force cell type */
bool autocell; /* T if set auto mount operation */
bool dyn_root; /* T if dynamic root */
bool no_cell; /* T if the source is "none" (for dynroot) */
enum afs_flock_mode flock_mode; /* Partial file-locking emulation mode */
afs_voltype_t type; /* type of volume requested */
unsigned int volnamesz; /* size of volume name */
const char *volname; /* name of volume to mount */
@ -221,6 +234,7 @@ struct afs_super_info {
struct net *net_ns; /* Network namespace */
struct afs_cell *cell; /* The cell in which the volume resides */
struct afs_volume *volume; /* volume record */
enum afs_flock_mode flock_mode:8; /* File locking emulation mode */
bool dyn_root; /* True if dynamic root */
};
@ -599,6 +613,7 @@ enum afs_lock_state {
AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */
AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */
AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */
AFS_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */
};
/*
@ -620,6 +635,8 @@ struct afs_vnode {
struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */
struct mutex io_lock; /* Lock for serialising I/O on this mutex */
struct rw_semaphore validate_lock; /* lock for validating this vnode */
struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */
struct key *silly_key; /* Silly rename key */
spinlock_t wb_lock; /* lock for wb_keys */
spinlock_t lock; /* waitqueue/flags lock */
unsigned long flags;
@ -638,6 +655,7 @@ struct afs_vnode {
struct list_head granted_locks; /* locks granted on this file */
struct delayed_work lock_work; /* work to be done in locking */
struct key *lock_key; /* Key to be used in lock ops */
ktime_t locked_at; /* Time at which lock obtained */
enum afs_lock_state lock_state : 8;
afs_lock_type_t lock_type : 8;
@ -864,6 +882,7 @@ extern const struct address_space_operations afs_dir_aops;
extern const struct dentry_operations afs_fs_dentry_operations;
extern void afs_d_release(struct dentry *);
extern int afs_dir_remove_link(struct dentry *, struct key *, unsigned long, unsigned long);
/*
* dir_edit.c
@ -872,6 +891,13 @@ extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *
enum afs_edit_dir_reason);
extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason);
/*
* dir_silly.c
*/
extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *,
struct dentry *, struct key *);
extern int afs_silly_iput(struct dentry *, struct inode *);
/*
* dynroot.c
*/
@ -905,6 +931,7 @@ extern void afs_put_read(struct afs_read *);
*/
extern struct workqueue_struct *afs_lock_manager;
extern void afs_lock_op_done(struct afs_call *);
extern void afs_lock_work(struct work_struct *);
extern void afs_lock_may_be_available(struct afs_vnode *);
extern int afs_lock(struct file *, int, struct file_lock *);
@ -939,8 +966,9 @@ extern int afs_fs_extend_lock(struct afs_fs_cursor *);
extern int afs_fs_release_lock(struct afs_fs_cursor *);
extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *,
struct afs_addr_cursor *, struct key *);
extern int afs_fs_get_capabilities(struct afs_net *, struct afs_server *,
struct afs_addr_cursor *, struct key *, unsigned int, bool);
extern struct afs_call *afs_fs_get_capabilities(struct afs_net *, struct afs_server *,
struct afs_addr_cursor *, struct key *,
unsigned int);
extern int afs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *,
struct afs_fid *, struct afs_file_status *,
struct afs_callback *, unsigned int,
@ -949,6 +977,14 @@ extern int afs_fs_fetch_status(struct afs_fs_cursor *, struct afs_net *,
struct afs_fid *, struct afs_file_status *,
struct afs_callback *, struct afs_volsync *);
struct afs_acl {
u32 size;
u8 data[];
};
extern struct afs_acl *afs_fs_fetch_acl(struct afs_fs_cursor *);
extern int afs_fs_store_acl(struct afs_fs_cursor *, const struct afs_acl *);
/*
* fs_probe.c
*/
@ -965,7 +1001,8 @@ extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool);
extern struct inode *afs_iget(struct super_block *, struct key *,
struct afs_fid *, struct afs_file_status *,
struct afs_callback *,
struct afs_cb_interest *);
struct afs_cb_interest *,
struct afs_vnode *);
extern void afs_zap_data(struct afs_vnode *);
extern int afs_validate(struct afs_vnode *, struct key *);
extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int);
@ -1073,7 +1110,8 @@ extern int __net_init afs_open_socket(struct afs_net *);
extern void __net_exit afs_close_socket(struct afs_net *);
extern void afs_charge_preallocation(struct work_struct *);
extern void afs_put_call(struct afs_call *);
extern long afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t, bool);
extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t);
extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *);
extern struct afs_call *afs_alloc_flat_call(struct afs_net *,
const struct afs_call_type *,
size_t, size_t);
@ -1218,8 +1256,8 @@ extern void afs_fs_exit(void);
extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *,
const char *, int);
extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *);
extern int afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, struct key *,
struct afs_vlserver *, unsigned int, bool);
extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *,
struct key *, struct afs_vlserver *, unsigned int);
extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *);
/*
@ -1333,6 +1371,20 @@ extern int yfs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *,
struct afs_callback *, unsigned int,
struct afs_volsync *);
struct yfs_acl {
struct afs_acl *acl; /* Dir/file/symlink ACL */
struct afs_acl *vol_acl; /* Whole volume ACL */
u32 inherit_flag; /* True if ACL is inherited from parent dir */
u32 num_cleaned; /* Number of ACEs removed due to subject removal */
unsigned int flags;
#define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */
#define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */
};
extern void yfs_free_opaque_acl(struct yfs_acl *);
extern struct yfs_acl *yfs_fs_fetch_opaque_acl(struct afs_fs_cursor *, unsigned int);
extern int yfs_fs_store_opaque_acl2(struct afs_fs_cursor *, const struct afs_acl *);
/*
* Miscellaneous inline functions.
*/

6
fs/afs/protocol_yfs.h
View File

@ -31,9 +31,9 @@ enum YFS_CM_Operations {
};
enum YFS_FS_Operations {
YFSFETCHACL = 64131, /* YFS Fetch file ACL */
YFSFETCHACL = 64131, /* YFS Fetch file AFS3 ACL */
YFSFETCHSTATUS = 64132, /* YFS Fetch file status */
YFSSTOREACL = 64134, /* YFS Store file ACL */
YFSSTOREACL = 64134, /* YFS Store file AFS3 ACL */
YFSSTORESTATUS = 64135, /* YFS Store file status */
YFSREMOVEFILE = 64136, /* YFS Remove a file */
YFSCREATEFILE = 64137, /* YFS Create a file */
@ -49,7 +49,7 @@ enum YFS_FS_Operations {
YFSRELEASELOCK = 64158, /* YFS Release a file lock */
YFSLOOKUP = 64161, /* YFS lookup file in directory */
YFSFLUSHCPS = 64165,
YFSFETCHOPAQUEACL = 64168,
YFSFETCHOPAQUEACL = 64168, /* YFS Fetch file YFS ACL */
YFSWHOAMI = 64170,
YFSREMOVEACL = 64171,
YFSREMOVEFILE2 = 64173,

33
fs/afs/rxrpc.c
View File

@ -21,7 +21,6 @@
struct workqueue_struct *afs_async_calls;
static void afs_wake_up_call_waiter(struct sock *, struct rxrpc_call *, unsigned long);
static long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *);
static void afs_wake_up_async_call(struct sock *, struct rxrpc_call *, unsigned long);
static void afs_delete_async_call(struct work_struct *);
static void afs_process_async_call(struct work_struct *);
@ -361,10 +360,10 @@ static int afs_send_pages(struct afs_call *call, struct msghdr *msg)
}
/*
* initiate a call
* Initiate a call and synchronously queue up the parameters for dispatch. Any
* error is stored into the call struct, which the caller must check for.
*/
long afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call,
gfp_t gfp, bool async)
void afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call, gfp_t gfp)
{
struct sockaddr_rxrpc *srx = &ac->alist->addrs[ac->index];
struct rxrpc_call *rxcall;
@ -382,7 +381,6 @@ long afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call,
call, call->type->name, key_serial(call->key),
atomic_read(&call->net->nr_outstanding_calls));
call->async = async;
call->addr_ix = ac->index;
call->alist = afs_get_addrlist(ac->alist);
@ -415,7 +413,7 @@ long afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call,
rxcall = rxrpc_kernel_begin_call(call->net->socket, srx, call->key,
(unsigned long)call,
tx_total_len, gfp,
(async ?
(call->async ?
afs_wake_up_async_call :
afs_wake_up_call_waiter),
call->upgrade,
@ -453,13 +451,11 @@ long afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call,
/* Note that at this point, we may have received the reply or an abort
* - and an asynchronous call may already have completed.
*
* afs_wait_for_call_to_complete(call, ac)
* must be called to synchronously clean up.
*/
if (call->async) {
afs_put_call(call);
return -EINPROGRESS;
}
return afs_wait_for_call_to_complete(call, ac);
return;
error_do_abort:
if (ret != -ECONNABORTED) {
@ -495,9 +491,7 @@ error_kill_call:
ac->error = ret;
call->state = AFS_CALL_COMPLETE;
afs_put_call(call);
_leave(" = %d", ret);
return ret;
}
/*
@ -604,10 +598,10 @@ call_complete:
}
/*
* wait synchronously for a call to complete
* Wait synchronously for a call to complete and clean up the call struct.
*/
static long afs_wait_for_call_to_complete(struct afs_call *call,
struct afs_addr_cursor *ac)
long afs_wait_for_call_to_complete(struct afs_call *call,
struct afs_addr_cursor *ac)
{
signed long rtt2, timeout;
long ret;
@ -620,6 +614,10 @@ static long afs_wait_for_call_to_complete(struct afs_call *call,
_enter("");
ret = call->error;
if (ret < 0)
goto out;
rtt = rxrpc_kernel_get_rtt(call->net->socket, call->rxcall);
rtt2 = nsecs_to_jiffies64(rtt) * 2;
if (rtt2 < 2)
@ -703,6 +701,7 @@ static long afs_wait_for_call_to_complete(struct afs_call *call,
break;
}
out:
_debug("call complete");
afs_put_call(call);
_leave(" = %p", (void *)ret);

34
fs/afs/super.c
View File

@ -46,7 +46,7 @@ struct file_system_type afs_fs_type = {
.init_fs_context = afs_init_fs_context,
.parameters = &afs_fs_parameters,
.kill_sb = afs_kill_super,
.fs_flags = 0,
.fs_flags = FS_RENAME_DOES_D_MOVE,
};
MODULE_ALIAS_FS("afs");
@ -69,19 +69,30 @@ static atomic_t afs_count_active_inodes;
enum afs_param {
Opt_autocell,
Opt_dyn,
Opt_flock,
Opt_source,
};
static const struct fs_parameter_spec afs_param_specs[] = {
fsparam_flag ("autocell", Opt_autocell),
fsparam_flag ("dyn", Opt_dyn),
fsparam_enum ("flock", Opt_flock),
fsparam_string("source", Opt_source),
{}
};
static const struct fs_parameter_enum afs_param_enums[] = {
{ Opt_flock, "local", afs_flock_mode_local },
{ Opt_flock, "openafs", afs_flock_mode_openafs },
{ Opt_flock, "strict", afs_flock_mode_strict },
{ Opt_flock, "write", afs_flock_mode_write },
{}
};
static const struct fs_parameter_description afs_fs_parameters = {
.name = "kAFS",
.specs = afs_param_specs,
.enums = afs_param_enums,
};
/*
@ -184,11 +195,22 @@ static int afs_show_devname(struct seq_file *m, struct dentry *root)
static int afs_show_options(struct seq_file *m, struct dentry *root)
{
struct afs_super_info *as = AFS_FS_S(root->d_sb);
const char *p = NULL;
if (as->dyn_root)
seq_puts(m, ",dyn");
if (test_bit(AFS_VNODE_AUTOCELL, &AFS_FS_I(d_inode(root))->flags))
seq_puts(m, ",autocell");
switch (as->flock_mode) {
case afs_flock_mode_unset: break;
case afs_flock_mode_local: p = "local"; break;
case afs_flock_mode_openafs: p = "openafs"; break;
case afs_flock_mode_strict: p = "strict"; break;
case afs_flock_mode_write: p = "write"; break;
}
if (p)
seq_printf(m, ",flock=%s", p);
return 0;
}
@ -317,6 +339,10 @@ static int afs_parse_param(struct fs_context *fc, struct fs_parameter *param)
ctx->dyn_root = true;
break;
case Opt_flock:
ctx->flock_mode = result.uint_32;
break;
default:
return -EINVAL;
}
@ -429,7 +455,7 @@ static int afs_fill_super(struct super_block *sb, struct afs_fs_context *ctx)
fid.vnode = 1;
fid.vnode_hi = 0;
fid.unique = 1;
inode = afs_iget(sb, ctx->key, &fid, NULL, NULL, NULL);
inode = afs_iget(sb, ctx->key, &fid, NULL, NULL, NULL, NULL);
}
if (IS_ERR(inode))
@ -468,6 +494,7 @@ static struct afs_super_info *afs_alloc_sbi(struct fs_context *fc)
as = kzalloc(sizeof(struct afs_super_info), GFP_KERNEL);
if (as) {
as->net_ns = get_net(fc->net_ns);
as->flock_mode = ctx->flock_mode;
if (ctx->dyn_root) {
as->dyn_root = true;
} else {
@ -552,6 +579,7 @@ static int afs_get_tree(struct fs_context *fc)
}
fc->root = dget(sb->s_root);
trace_afs_get_tree(as->cell, as->volume);
_leave(" = 0 [%p]", sb);
return 0;
@ -658,6 +686,8 @@ static struct inode *afs_alloc_inode(struct super_block *sb)
vnode->cb_type = 0;
vnode->lock_state = AFS_VNODE_LOCK_NONE;
init_rwsem(&vnode->rmdir_lock);
_leave(" = %p", &vnode->vfs_inode);
return &vnode->vfs_inode;
}

14
fs/afs/vl_probe.c
View File

@ -141,8 +141,8 @@ static bool afs_do_probe_vlserver(struct afs_net *net,
struct afs_addr_cursor ac = {
.index = 0,
};
struct afs_call *call;
bool in_progress = false;
int err;
_enter("%s", server->name);
@ -156,12 +156,14 @@ static bool afs_do_probe_vlserver(struct afs_net *net,
server->probe.rtt = UINT_MAX;
for (ac.index = 0; ac.index < ac.alist->nr_addrs; ac.index++) {
err = afs_vl_get_capabilities(net, &ac, key, server,
server_index, true);
if (err == -EINPROGRESS)
call = afs_vl_get_capabilities(net, &ac, key, server,
server_index);
if (!IS_ERR(call)) {
afs_put_call(call);
in_progress = true;
else
afs_prioritise_error(_e, err, ac.abort_code);
} else {
afs_prioritise_error(_e, PTR_ERR(call), ac.abort_code);
}
}
if (!in_progress)

26
fs/afs/vlclient.c
View File

@ -167,7 +167,8 @@ struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *vc,
memset((void *)bp + volnamesz, 0, padsz);
trace_afs_make_vl_call(call);
return (struct afs_vldb_entry *)afs_make_call(&vc->ac, call, GFP_KERNEL, false);
afs_make_call(&vc->ac, call, GFP_KERNEL);
return (struct afs_vldb_entry *)afs_wait_for_call_to_complete(call, &vc->ac);
}
/*
@ -306,7 +307,8 @@ struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *vc,
r->uuid.node[i] = htonl(u->node[i]);
trace_afs_make_vl_call(call);
return (struct afs_addr_list *)afs_make_call(&vc->ac, call, GFP_KERNEL, false);
afs_make_call(&vc->ac, call, GFP_KERNEL);
return (struct afs_addr_list *)afs_wait_for_call_to_complete(call, &vc->ac);
}
/*
@ -380,12 +382,11 @@ static const struct afs_call_type afs_RXVLGetCapabilities = {
* We use this to probe for service upgrade to determine what the server at the
* other end supports.
*/
int afs_vl_get_capabilities(struct afs_net *net,
struct afs_addr_cursor *ac,
struct key *key,
struct afs_vlserver *server,
unsigned int server_index,
bool async)
struct afs_call *afs_vl_get_capabilities(struct afs_net *net,
struct afs_addr_cursor *ac,
struct key *key,
struct afs_vlserver *server,
unsigned int server_index)
{
struct afs_call *call;
__be32 *bp;
@ -394,13 +395,14 @@ int afs_vl_get_capabilities(struct afs_net *net,
call = afs_alloc_flat_call(net, &afs_RXVLGetCapabilities, 1 * 4, 16 * 4);
if (!call)
return -ENOMEM;
return ERR_PTR(-ENOMEM);
call->key = key;
call->reply[0] = afs_get_vlserver(server);
call->reply[1] = (void *)(long)server_index;
call->upgrade = true;
call->want_reply_time = true;
call->async = true;
/* marshall the parameters */
bp = call->request;
@ -408,7 +410,8 @@ int afs_vl_get_capabilities(struct afs_net *net,
/* Can't take a ref on server */
trace_afs_make_vl_call(call);
return afs_make_call(ac, call, GFP_KERNEL, async);
afs_make_call(ac, call, GFP_KERNEL);
return call;
}
/*
@ -651,5 +654,6 @@ struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *vc,
memcpy(bp, uuid, sizeof(*uuid)); /* Type opr_uuid */
trace_afs_make_vl_call(call);
return (struct afs_addr_list *)afs_make_call(&vc->ac, call, GFP_KERNEL, false);
afs_make_call(&vc->ac, call, GFP_KERNEL);
return (struct afs_addr_list *)afs_wait_for_call_to_complete(call, &vc->ac);
}

270
fs/afs/xattr.c
View File

@ -16,9 +16,14 @@
#include "internal.h"
static const char afs_xattr_list[] =
"afs.acl\0"
"afs.cell\0"
"afs.fid\0"
"afs.volume";
"afs.volume\0"
"afs.yfs.acl\0"
"afs.yfs.acl_inherited\0"
"afs.yfs.acl_num_cleaned\0"
"afs.yfs.vol_acl";
/*
* Retrieve a list of the supported xattrs.
@ -33,6 +38,248 @@ ssize_t afs_listxattr(struct dentry *dentry, char *buffer, size_t size)
return sizeof(afs_xattr_list);
}
/*
* Get a file's ACL.
*/
static int afs_xattr_get_acl(const struct xattr_handler *handler,
struct dentry *dentry,
struct inode *inode, const char *name,
void *buffer, size_t size)
{
struct afs_fs_cursor fc;
struct afs_vnode *vnode = AFS_FS_I(inode);
struct afs_acl *acl = NULL;
struct key *key;
int ret;
key = afs_request_key(vnode->volume->cell);
if (IS_ERR(key))
return PTR_ERR(key);
ret = -ERESTARTSYS;
if (afs_begin_vnode_operation(&fc, vnode, key)) {
while (afs_select_fileserver(&fc)) {
fc.cb_break = afs_calc_vnode_cb_break(vnode);
acl = afs_fs_fetch_acl(&fc);
}
afs_check_for_remote_deletion(&fc, fc.vnode);
afs_vnode_commit_status(&fc, vnode, fc.cb_break);
ret = afs_end_vnode_operation(&fc);
}
if (ret == 0) {
ret = acl->size;
if (size > 0) {
ret = -ERANGE;
if (acl->size > size)
return -ERANGE;
memcpy(buffer, acl->data, acl->size);
ret = acl->size;
}
kfree(acl);
}
key_put(key);
return ret;
}
/*
* Set a file's AFS3 ACL.
*/
static int afs_xattr_set_acl(const struct xattr_handler *handler,
struct dentry *dentry,
struct inode *inode, const char *name,
const void *buffer, size_t size, int flags)
{
struct afs_fs_cursor fc;
struct afs_vnode *vnode = AFS_FS_I(inode);
struct afs_acl *acl = NULL;
struct key *key;
int ret;
if (flags == XATTR_CREATE)
return -EINVAL;
key = afs_request_key(vnode->volume->cell);
if (IS_ERR(key))
return PTR_ERR(key);
acl = kmalloc(sizeof(*acl) + size, GFP_KERNEL);
if (!acl) {
key_put(key);
return -ENOMEM;
}
acl->size = size;
memcpy(acl->data, buffer, size);
ret = -ERESTARTSYS;
if (afs_begin_vnode_operation(&fc, vnode, key)) {
while (afs_select_fileserver(&fc)) {
fc.cb_break = afs_calc_vnode_cb_break(vnode);
afs_fs_store_acl(&fc, acl);
}
afs_check_for_remote_deletion(&fc, fc.vnode);
afs_vnode_commit_status(&fc, vnode, fc.cb_break);
ret = afs_end_vnode_operation(&fc);
}
kfree(acl);
key_put(key);
return ret;
}
static const struct xattr_handler afs_xattr_afs_acl_handler = {
.name = "afs.acl",
.get = afs_xattr_get_acl,
.set = afs_xattr_set_acl,
};
/*
* Get a file's YFS ACL.
*/
static int afs_xattr_get_yfs(const struct xattr_handler *handler,
struct dentry *dentry,
struct inode *inode, const char *name,
void *buffer, size_t size)
{
struct afs_fs_cursor fc;
struct afs_vnode *vnode = AFS_FS_I(inode);
struct yfs_acl *yacl = NULL;
struct key *key;
unsigned int flags = 0;
char buf[16], *data;
int which = 0, dsize, ret;
if (strcmp(name, "acl") == 0)
which = 0;
else if (strcmp(name, "acl_inherited") == 0)
which = 1;
else if (strcmp(name, "acl_num_cleaned") == 0)
which = 2;
else if (strcmp(name, "vol_acl") == 0)
which = 3;
else
return -EOPNOTSUPP;
if (which == 0)
flags |= YFS_ACL_WANT_ACL;
else if (which == 3)
flags |= YFS_ACL_WANT_VOL_ACL;
key = afs_request_key(vnode->volume->cell);
if (IS_ERR(key))
return PTR_ERR(key);
ret = -ERESTARTSYS;
if (afs_begin_vnode_operation(&fc, vnode, key)) {
while (afs_select_fileserver(&fc)) {
fc.cb_break = afs_calc_vnode_cb_break(vnode);
yacl = yfs_fs_fetch_opaque_acl(&fc, flags);
}
afs_check_for_remote_deletion(&fc, fc.vnode);
afs_vnode_commit_status(&fc, vnode, fc.cb_break);
ret = afs_end_vnode_operation(&fc);
}
if (ret == 0) {
switch (which) {
case 0:
data = yacl->acl->data;
dsize = yacl->acl->size;
break;
case 1:
data = buf;
dsize = snprintf(buf, sizeof(buf), "%u",
yacl->inherit_flag);
break;
case 2:
data = buf;
dsize = snprintf(buf, sizeof(buf), "%u",
yacl->num_cleaned);
break;
case 3:
data = yacl->vol_acl->data;
dsize = yacl->vol_acl->size;
break;
default:
ret = -EOPNOTSUPP;
goto out;
}
ret = dsize;
if (size > 0) {
if (dsize > size) {
ret = -ERANGE;
goto out;
}
memcpy(buffer, data, dsize);
}
}
out:
yfs_free_opaque_acl(yacl);
key_put(key);
return ret;
}
/*
* Set a file's YFS ACL.
*/
static int afs_xattr_set_yfs(const struct xattr_handler *handler,
struct dentry *dentry,
struct inode *inode, const char *name,
const void *buffer, size_t size, int flags)
{
struct afs_fs_cursor fc;
struct afs_vnode *vnode = AFS_FS_I(inode);
struct afs_acl *acl = NULL;
struct key *key;
int ret;
if (flags == XATTR_CREATE ||
strcmp(name, "acl") != 0)
return -EINVAL;
key = afs_request_key(vnode->volume->cell);
if (IS_ERR(key))
return PTR_ERR(key);
acl = kmalloc(sizeof(*acl) + size, GFP_KERNEL);
if (!acl) {
key_put(key);
return -ENOMEM;
}
acl->size = size;
memcpy(acl->data, buffer, size);
ret = -ERESTARTSYS;
if (afs_begin_vnode_operation(&fc, vnode, key)) {
while (afs_select_fileserver(&fc)) {
fc.cb_break = afs_calc_vnode_cb_break(vnode);
yfs_fs_store_opaque_acl2(&fc, acl);
}
afs_check_for_remote_deletion(&fc, fc.vnode);
afs_vnode_commit_status(&fc, vnode, fc.cb_break);
ret = afs_end_vnode_operation(&fc);
}
kfree(acl);
key_put(key);
return ret;
}
static const struct xattr_handler afs_xattr_yfs_handler = {
.prefix = "afs.yfs.",
.get = afs_xattr_get_yfs,
.set = afs_xattr_set_yfs,
};
/*
* Get the name of the cell on which a file resides.
*/
@ -50,7 +297,7 @@ static int afs_xattr_get_cell(const struct xattr_handler *handler,
return namelen;
if (namelen > size)
return -ERANGE;
memcpy(buffer, cell->name, size);
memcpy(buffer, cell->name, namelen);
return namelen;
}
@ -69,11 +316,20 @@ static int afs_xattr_get_fid(const struct xattr_handler *handler,
void *buffer, size_t size)
{
struct afs_vnode *vnode = AFS_FS_I(inode);
char text[8 + 1 + 8 + 1 + 8 + 1];
char text[16 + 1 + 24 + 1 + 8 + 1];
size_t len;
len = sprintf(text, "%llx:%llx:%x",
vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique);
/* The volume ID is 64-bit, the vnode ID is 96-bit and the
* uniquifier is 32-bit.
*/
len = sprintf(text, "%llx:", vnode->fid.vid);
if (vnode->fid.vnode_hi)
len += sprintf(text + len, "%x%016llx",
vnode->fid.vnode_hi, vnode->fid.vnode);
else
len += sprintf(text + len, "%llx", vnode->fid.vnode);
len += sprintf(text + len, ":%x", vnode->fid.unique);
if (size == 0)
return len;
if (len > size)
@ -104,7 +360,7 @@ static int afs_xattr_get_volume(const struct xattr_handler *handler,
return namelen;
if (namelen > size)
return -ERANGE;
memcpy(buffer, volname, size);
memcpy(buffer, volname, namelen);
return namelen;
}
@ -114,8 +370,10 @@ static const struct xattr_handler afs_xattr_afs_volume_handler = {
};
const struct xattr_handler *afs_xattr_handlers[] = {
&afs_xattr_afs_acl_handler,
&afs_xattr_afs_cell_handler,
&afs_xattr_afs_fid_handler,
&afs_xattr_afs_volume_handler,
&afs_xattr_yfs_handler, /* afs.yfs. prefix */
NULL
};

329
fs/afs/yfsclient.c
View File

@ -519,7 +519,8 @@ int yfs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_volsync *volsy
call->cb_break = fc->cb_break;
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -711,7 +712,8 @@ int yfs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_read *req)
call->cb_break = fc->cb_break;
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -810,8 +812,9 @@ int yfs_fs_create_file(struct afs_fs_cursor *fc,
yfs_check_req(call, bp);
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
trace_afs_make_fs_call1(call, &vnode->fid, name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
static const struct afs_call_type yfs_RXFSMakeDir = {
@ -873,8 +876,9 @@ int yfs_fs_make_dir(struct afs_fs_cursor *fc,
yfs_check_req(call, bp);
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
trace_afs_make_fs_call1(call, &vnode->fid, name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -963,8 +967,9 @@ int yfs_fs_remove_file2(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
yfs_check_req(call, bp);
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &dvnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
trace_afs_make_fs_call1(call, &dvnode->fid, name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1050,8 +1055,9 @@ int yfs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
yfs_check_req(call, bp);
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &dvnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
trace_afs_make_fs_call1(call, &dvnode->fid, name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1135,8 +1141,9 @@ int yfs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
yfs_check_req(call, bp);
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
trace_afs_make_fs_call1(call, &vnode->fid, name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1231,8 +1238,9 @@ int yfs_fs_symlink(struct afs_fs_cursor *fc,
yfs_check_req(call, bp);
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &dvnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
trace_afs_make_fs_call1(call, &dvnode->fid, name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1329,8 +1337,9 @@ int yfs_fs_rename(struct afs_fs_cursor *fc,
yfs_check_req(call, bp);
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &orig_dvnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
trace_afs_make_fs_call2(call, &orig_dvnode->fid, orig_name, new_name);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1436,7 +1445,8 @@ int yfs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1524,7 +1534,8 @@ static int yfs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr)
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1567,7 +1578,8 @@ int yfs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr)
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1755,13 +1767,15 @@ int yfs_fs_get_volume_status(struct afs_fs_cursor *fc,
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* Deliver reply data to an YFS.SetLock, YFS.ExtendLock or YFS.ReleaseLock
* Deliver reply data to operations that just return a file status and a volume
* sync record.
*/
static int yfs_deliver_fs_xxxx_lock(struct afs_call *call)
static int yfs_deliver_status_and_volsync(struct afs_call *call)
{
struct afs_vnode *vnode = call->reply[0];
const __be32 *bp;
@ -1791,7 +1805,8 @@ static int yfs_deliver_fs_xxxx_lock(struct afs_call *call)
static const struct afs_call_type yfs_RXYFSSetLock = {
.name = "YFS.SetLock",
.op = yfs_FS_SetLock,
.deliver = yfs_deliver_fs_xxxx_lock,
.deliver = yfs_deliver_status_and_volsync,
.done = afs_lock_op_done,
.destructor = afs_flat_call_destructor,
};
@ -1801,7 +1816,8 @@ static const struct afs_call_type yfs_RXYFSSetLock = {
static const struct afs_call_type yfs_RXYFSExtendLock = {
.name = "YFS.ExtendLock",
.op = yfs_FS_ExtendLock,
.deliver = yfs_deliver_fs_xxxx_lock,
.deliver = yfs_deliver_status_and_volsync,
.done = afs_lock_op_done,
.destructor = afs_flat_call_destructor,
};
@ -1811,7 +1827,7 @@ static const struct afs_call_type yfs_RXYFSExtendLock = {
static const struct afs_call_type yfs_RXYFSReleaseLock = {
.name = "YFS.ReleaseLock",
.op = yfs_FS_ReleaseLock,
.deliver = yfs_deliver_fs_xxxx_lock,
.deliver = yfs_deliver_status_and_volsync,
.destructor = afs_flat_call_destructor,
};
@ -1838,6 +1854,7 @@ int yfs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type)
call->key = fc->key;
call->reply[0] = vnode;
call->want_reply_time = true;
/* marshall the parameters */
bp = call->request;
@ -1848,8 +1865,9 @@ int yfs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type)
yfs_check_req(call, bp);
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
trace_afs_make_fs_calli(call, &vnode->fid, type);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1874,6 +1892,7 @@ int yfs_fs_extend_lock(struct afs_fs_cursor *fc)
call->key = fc->key;
call->reply[0] = vnode;
call->want_reply_time = true;
/* marshall the parameters */
bp = call->request;
@ -1884,7 +1903,8 @@ int yfs_fs_extend_lock(struct afs_fs_cursor *fc)
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -1919,7 +1939,8 @@ int yfs_fs_release_lock(struct afs_fs_cursor *fc)
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -2007,7 +2028,8 @@ int yfs_fs_fetch_status(struct afs_fs_cursor *fc,
call->cb_break = fc->cb_break;
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
@ -2190,5 +2212,250 @@ int yfs_fs_inline_bulk_status(struct afs_fs_cursor *fc,
call->cb_break = fc->cb_break;
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &fids[0]);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* Deliver reply data to an YFS.FetchOpaqueACL.
*/
static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
{
struct afs_volsync *volsync = call->reply[2];
struct afs_vnode *vnode = call->reply[1];
struct yfs_acl *yacl = call->reply[0];
struct afs_acl *acl;
const __be32 *bp;
unsigned int size;
int ret;
_enter("{%u}", call->unmarshall);
switch (call->unmarshall) {
case 0:
afs_extract_to_tmp(call);
call->unmarshall++;
/* Extract the file ACL length */
case 1:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
size = call->count2 = ntohl(call->tmp);
size = round_up(size, 4);
if (yacl->flags & YFS_ACL_WANT_ACL) {
acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
if (!acl)
return -ENOMEM;
yacl->acl = acl;
acl->size = call->count2;
afs_extract_begin(call, acl->data, size);
} else {
iov_iter_discard(&call->iter, READ, size);
}
call->unmarshall++;
/* Extract the file ACL */
case 2:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
afs_extract_to_tmp(call);
call->unmarshall++;
/* Extract the volume ACL length */
case 3:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
size = call->count2 = ntohl(call->tmp);
size = round_up(size, 4);
if (yacl->flags & YFS_ACL_WANT_VOL_ACL) {
acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
if (!acl)
return -ENOMEM;
yacl->vol_acl = acl;
acl->size = call->count2;
afs_extract_begin(call, acl->data, size);
} else {
iov_iter_discard(&call->iter, READ, size);
}
call->unmarshall++;
/* Extract the volume ACL */
case 4:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
afs_extract_to_buf(call,
sizeof(__be32) * 2 +
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSVolSync));
call->unmarshall++;
/* extract the metadata */
case 5:
ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
bp = call->buffer;
yacl->inherit_flag = ntohl(*bp++);
yacl->num_cleaned = ntohl(*bp++);
ret = yfs_decode_status(call, &bp, &vnode->status, vnode,
&call->expected_version, NULL);
if (ret < 0)
return ret;
xdr_decode_YFSVolSync(&bp, volsync);
call->unmarshall++;
case 6:
break;
}
_leave(" = 0 [done]");
return 0;
}
void yfs_free_opaque_acl(struct yfs_acl *yacl)
{
if (yacl) {
kfree(yacl->acl);
kfree(yacl->vol_acl);
kfree(yacl);
}
}
static void yfs_destroy_fs_fetch_opaque_acl(struct afs_call *call)
{
yfs_free_opaque_acl(call->reply[0]);
afs_flat_call_destructor(call);
}
/*
* YFS.FetchOpaqueACL operation type
*/
static const struct afs_call_type yfs_RXYFSFetchOpaqueACL = {
.name = "YFS.FetchOpaqueACL",
.op = yfs_FS_FetchOpaqueACL,
.deliver = yfs_deliver_fs_fetch_opaque_acl,
.destructor = yfs_destroy_fs_fetch_opaque_acl,
};
/*
* Fetch the YFS advanced ACLs for a file.
*/
struct yfs_acl *yfs_fs_fetch_opaque_acl(struct afs_fs_cursor *fc,
unsigned int flags)
{
struct afs_vnode *vnode = fc->vnode;
struct afs_call *call;
struct yfs_acl *yacl;
struct afs_net *net = afs_v2net(vnode);
__be32 *bp;
_enter(",%x,{%llx:%llu},,",
key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
call = afs_alloc_flat_call(net, &yfs_RXYFSFetchOpaqueACL,
sizeof(__be32) * 2 +
sizeof(struct yfs_xdr_YFSFid),
sizeof(__be32) * 2 +
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSVolSync));
if (!call)
goto nomem;
yacl = kzalloc(sizeof(struct yfs_acl), GFP_KERNEL);
if (!yacl)
goto nomem_call;
yacl->flags = flags;
call->key = fc->key;
call->reply[0] = yacl;
call->reply[1] = vnode;
call->reply[2] = NULL; /* volsync */
call->ret_reply0 = true;
/* marshall the parameters */
bp = call->request;
bp = xdr_encode_u32(bp, YFSFETCHOPAQUEACL);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &vnode->fid);
yfs_check_req(call, bp);
call->cb_break = fc->cb_break;
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
afs_make_call(&fc->ac, call, GFP_KERNEL);
return (struct yfs_acl *)afs_wait_for_call_to_complete(call, &fc->ac);
nomem_call:
afs_put_call(call);
nomem:
fc->ac.error = -ENOMEM;
return ERR_PTR(-ENOMEM);
}
/*
* YFS.StoreOpaqueACL2 operation type
*/
static const struct afs_call_type yfs_RXYFSStoreOpaqueACL2 = {
.name = "YFS.StoreOpaqueACL2",
.op = yfs_FS_StoreOpaqueACL2,
.deliver = yfs_deliver_status_and_volsync,
.destructor = afs_flat_call_destructor,
};
/*
* Fetch the YFS ACL for a file.
*/
int yfs_fs_store_opaque_acl2(struct afs_fs_cursor *fc, const struct afs_acl *acl)
{
struct afs_vnode *vnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(vnode);
size_t size;
__be32 *bp;
_enter(",%x,{%llx:%llu},,",
key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
size = round_up(acl->size, 4);
call = afs_alloc_flat_call(net, &yfs_RXYFSStoreStatus,
sizeof(__be32) * 2 +
sizeof(struct yfs_xdr_YFSFid) +
sizeof(__be32) + size,
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSVolSync));
if (!call) {
fc->ac.error = -ENOMEM;
return -ENOMEM;
}
call->key = fc->key;
call->reply[0] = vnode;
call->reply[2] = NULL; /* volsync */
/* marshall the parameters */
bp = call->request;
bp = xdr_encode_u32(bp, YFSSTOREOPAQUEACL2);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &vnode->fid);
bp = xdr_encode_u32(bp, acl->size);
memcpy(bp, acl->data, acl->size);
if (acl->size != size)
memset((void *)bp + acl->size, 0, size - acl->size);
yfs_check_req(call, bp);
trace_afs_make_fs_call(call, &vnode->fid);
afs_make_call(&fc->ac, call, GFP_KERNEL);
return afs_wait_for_call_to_complete(call, &fc->ac);
}

1
include/linux/fs.h
View File

@ -1098,6 +1098,7 @@ struct file_lock {
struct {
struct list_head link; /* link in AFS vnode's pending_locks list */
int state; /* state of grant or error if -ve */
unsigned int debug_id;
} afs;
} fl_u;
} __randomize_layout;

385
include/trace/events/afs.h
View File

@ -33,8 +33,10 @@ enum afs_call_trace {
enum afs_fs_operation {
afs_FS_FetchData = 130, /* AFS Fetch file data */
afs_FS_FetchACL = 131, /* AFS Fetch file ACL */
afs_FS_FetchStatus = 132, /* AFS Fetch file status */
afs_FS_StoreData = 133, /* AFS Store file data */
afs_FS_StoreACL = 134, /* AFS Store file ACL */
afs_FS_StoreStatus = 135, /* AFS Store file status */
afs_FS_RemoveFile = 136, /* AFS Remove a file */
afs_FS_CreateFile = 137, /* AFS Create a file */
@ -108,8 +110,12 @@ enum afs_edit_dir_reason {
afs_edit_dir_for_create,
afs_edit_dir_for_link,
afs_edit_dir_for_mkdir,
afs_edit_dir_for_rename,
afs_edit_dir_for_rename_0,
afs_edit_dir_for_rename_1,
afs_edit_dir_for_rename_2,
afs_edit_dir_for_rmdir,
afs_edit_dir_for_silly_0,
afs_edit_dir_for_silly_1,
afs_edit_dir_for_symlink,
afs_edit_dir_for_unlink,
};
@ -152,6 +158,43 @@ enum afs_file_error {
afs_file_error_writeback_fail,
};
enum afs_flock_event {
afs_flock_acquired,
afs_flock_callback_break,
afs_flock_defer_unlock,
afs_flock_extend_fail,
afs_flock_fail_other,
afs_flock_fail_perm,
afs_flock_no_lockers,
afs_flock_release_fail,
afs_flock_silly_delete,
afs_flock_timestamp,
afs_flock_try_to_lock,
afs_flock_vfs_lock,
afs_flock_vfs_locking,
afs_flock_waited,
afs_flock_waiting,
afs_flock_work_extending,
afs_flock_work_retry,
afs_flock_work_unlocking,
afs_flock_would_block,
};
enum afs_flock_operation {
afs_flock_op_copy_lock,
afs_flock_op_flock,
afs_flock_op_grant,
afs_flock_op_lock,
afs_flock_op_release_lock,
afs_flock_op_return_ok,
afs_flock_op_return_eagain,
afs_flock_op_return_edeadlk,
afs_flock_op_return_error,
afs_flock_op_set_lock,
afs_flock_op_unlock,
afs_flock_op_wake,
};
#endif /* end __AFS_DECLARE_TRACE_ENUMS_ONCE_ONLY */
/*
@ -237,8 +280,12 @@ enum afs_file_error {
EM(afs_edit_dir_for_create, "Create") \
EM(afs_edit_dir_for_link, "Link ") \
EM(afs_edit_dir_for_mkdir, "MkDir ") \
EM(afs_edit_dir_for_rename, "Rename") \
EM(afs_edit_dir_for_rename_0, "Renam0") \
EM(afs_edit_dir_for_rename_1, "Renam1") \
EM(afs_edit_dir_for_rename_2, "Renam2") \
EM(afs_edit_dir_for_rmdir, "RmDir ") \
EM(afs_edit_dir_for_silly_0, "S_Ren0") \
EM(afs_edit_dir_for_silly_1, "S_Ren1") \
EM(afs_edit_dir_for_symlink, "Symlnk") \
E_(afs_edit_dir_for_unlink, "Unlink")
@ -277,6 +324,56 @@ enum afs_file_error {
EM(afs_file_error_mntpt, "MNTPT_READ_FAILED") \
E_(afs_file_error_writeback_fail, "WRITEBACK_FAILED")
#define afs_flock_types \
EM(F_RDLCK, "RDLCK") \
EM(F_WRLCK, "WRLCK") \
E_(F_UNLCK, "UNLCK")
#define afs_flock_states \
EM(AFS_VNODE_LOCK_NONE, "NONE") \
EM(AFS_VNODE_LOCK_WAITING_FOR_CB, "WAIT_FOR_CB") \
EM(AFS_VNODE_LOCK_SETTING, "SETTING") \
EM(AFS_VNODE_LOCK_GRANTED, "GRANTED") \
EM(AFS_VNODE_LOCK_EXTENDING, "EXTENDING") \
EM(AFS_VNODE_LOCK_NEED_UNLOCK, "NEED_UNLOCK") \
EM(AFS_VNODE_LOCK_UNLOCKING, "UNLOCKING") \
E_(AFS_VNODE_LOCK_DELETED, "DELETED")
#define afs_flock_events \
EM(afs_flock_acquired, "Acquired") \
EM(afs_flock_callback_break, "Callback") \
EM(afs_flock_defer_unlock, "D-Unlock") \
EM(afs_flock_extend_fail, "Ext_Fail") \
EM(afs_flock_fail_other, "ErrOther") \
EM(afs_flock_fail_perm, "ErrPerm ") \
EM(afs_flock_no_lockers, "NoLocker") \
EM(afs_flock_release_fail, "Rel_Fail") \
EM(afs_flock_silly_delete, "SillyDel") \
EM(afs_flock_timestamp, "Timestmp") \
EM(afs_flock_try_to_lock, "TryToLck") \
EM(afs_flock_vfs_lock, "VFSLock ") \
EM(afs_flock_vfs_locking, "VFSLking") \
EM(afs_flock_waited, "Waited ") \
EM(afs_flock_waiting, "Waiting ") \
EM(afs_flock_work_extending, "Extendng") \
EM(afs_flock_work_retry, "Retry ") \
EM(afs_flock_work_unlocking, "Unlcking") \
E_(afs_flock_would_block, "EWOULDBL")
#define afs_flock_operations \
EM(afs_flock_op_copy_lock, "COPY ") \
EM(afs_flock_op_flock, "->flock ") \
EM(afs_flock_op_grant, "GRANT ") \
EM(afs_flock_op_lock, "->lock ") \
EM(afs_flock_op_release_lock, "RELEASE ") \
EM(afs_flock_op_return_ok, "<-OK ") \
EM(afs_flock_op_return_edeadlk, "<-EDEADL") \
EM(afs_flock_op_return_eagain, "<-EAGAIN") \
EM(afs_flock_op_return_error, "<-ERROR ") \
EM(afs_flock_op_set_lock, "SET ") \
EM(afs_flock_op_unlock, "UNLOCK ") \
E_(afs_flock_op_wake, "WAKE ")
/*
* Export enum symbols via userspace.
*/
@ -293,6 +390,8 @@ afs_edit_dir_reasons;
afs_eproto_causes;
afs_io_errors;
afs_file_errors;
afs_flock_types;
afs_flock_operations;
/*
* Now redefine the EM() and E_() macros to map the enums to the strings that
@ -442,6 +541,123 @@ TRACE_EVENT(afs_make_fs_call,
__print_symbolic(__entry->op, afs_fs_operations))
);
TRACE_EVENT(afs_make_fs_calli,
TP_PROTO(struct afs_call *call, const struct afs_fid *fid,
unsigned int i),
TP_ARGS(call, fid, i),
TP_STRUCT__entry(
__field(unsigned int, call )
__field(unsigned int, i )
__field(enum afs_fs_operation, op )
__field_struct(struct afs_fid, fid )
),
TP_fast_assign(
__entry->call = call->debug_id;
__entry->i = i;
__entry->op = call->operation_ID;
if (fid) {
__entry->fid = *fid;
} else {
__entry->fid.vid = 0;
__entry->fid.vnode = 0;
__entry->fid.unique = 0;
}
),
TP_printk("c=%08x %06llx:%06llx:%06x %s i=%u",
__entry->call,
__entry->fid.vid,
__entry->fid.vnode,
__entry->fid.unique,
__print_symbolic(__entry->op, afs_fs_operations),
__entry->i)
);
TRACE_EVENT(afs_make_fs_call1,
TP_PROTO(struct afs_call *call, const struct afs_fid *fid,
const char *name),
TP_ARGS(call, fid, name),
TP_STRUCT__entry(
__field(unsigned int, call )
__field(enum afs_fs_operation, op )
__field_struct(struct afs_fid, fid )
__array(char, name, 24 )
),
TP_fast_assign(
int __len = strlen(name);
__len = min(__len, 23);
__entry->call = call->debug_id;
__entry->op = call->operation_ID;
if (fid) {
__entry->fid = *fid;
} else {
__entry->fid.vid = 0;
__entry->fid.vnode = 0;
__entry->fid.unique = 0;
}
memcpy(__entry->name, name, __len);
__entry->name[__len] = 0;
),
TP_printk("c=%08x %06llx:%06llx:%06x %s \"%s\"",
__entry->call,
__entry->fid.vid,
__entry->fid.vnode,
__entry->fid.unique,
__print_symbolic(__entry->op, afs_fs_operations),
__entry->name)
);
TRACE_EVENT(afs_make_fs_call2,
TP_PROTO(struct afs_call *call, const struct afs_fid *fid,
const char *name, const char *name2),
TP_ARGS(call, fid, name, name2),
TP_STRUCT__entry(
__field(unsigned int, call )
__field(enum afs_fs_operation, op )
__field_struct(struct afs_fid, fid )
__array(char, name, 24 )
__array(char, name2, 24 )
),
TP_fast_assign(
int __len = strlen(name);
int __len2 = strlen(name2);
__len = min(__len, 23);
__len2 = min(__len2, 23);
__entry->call = call->debug_id;
__entry->op = call->operation_ID;
if (fid) {
__entry->fid = *fid;
} else {
__entry->fid.vid = 0;
__entry->fid.vnode = 0;
__entry->fid.unique = 0;
}
memcpy(__entry->name, name, __len);
__entry->name[__len] = 0;
memcpy(__entry->name2, name2, __len2);
__entry->name2[__len2] = 0;
),
TP_printk("c=%08x %06llx:%06llx:%06x %s \"%s\" \"%s\"",
__entry->call,
__entry->fid.vid,
__entry->fid.vnode,
__entry->fid.unique,
__print_symbolic(__entry->op, afs_fs_operations),
__entry->name,
__entry->name2)
);
TRACE_EVENT(afs_make_vl_call,
TP_PROTO(struct afs_call *call),
@ -639,6 +855,38 @@ TRACE_EVENT(afs_call_state,
__entry->ret, __entry->abort)
);
TRACE_EVENT(afs_lookup,
TP_PROTO(struct afs_vnode *dvnode, const struct qstr *name,
struct afs_vnode *vnode),
TP_ARGS(dvnode, name, vnode),
TP_STRUCT__entry(
__field_struct(struct afs_fid, dfid )
__field_struct(struct afs_fid, fid )
__array(char, name, 24 )
),
TP_fast_assign(
int __len = min_t(int, name->len, 23);
__entry->dfid = dvnode->fid;
if (vnode) {
__entry->fid = vnode->fid;
} else {
__entry->fid.vid = 0;
__entry->fid.vnode = 0;
__entry->fid.unique = 0;
}
memcpy(__entry->name, name->name, __len);
__entry->name[__len] = 0;
),
TP_printk("d=%llx:%llx:%x \"%s\" f=%llx:%x",
__entry->dfid.vid, __entry->dfid.vnode, __entry->dfid.unique,
__entry->name,
__entry->fid.vnode, __entry->fid.unique)
);
TRACE_EVENT(afs_edit_dir,
TP_PROTO(struct afs_vnode *dvnode,
enum afs_edit_dir_reason why,
@ -660,12 +908,12 @@ TRACE_EVENT(afs_edit_dir,
__field(unsigned short, slot )
__field(unsigned int, f_vnode )
__field(unsigned int, f_unique )
__array(char, name, 18 )
__array(char, name, 24 )
),
TP_fast_assign(
int __len = strlen(name);
__len = min(__len, 17);
__len = min(__len, 23);
__entry->vnode = dvnode->fid.vnode;
__entry->unique = dvnode->fid.unique;
__entry->why = why;
@ -678,7 +926,7 @@ TRACE_EVENT(afs_edit_dir,
__entry->name[__len] = 0;
),
TP_printk("d=%x:%x %s %s %u[%u] f=%x:%x %s",
TP_printk("d=%x:%x %s %s %u[%u] f=%x:%x \"%s\"",
__entry->vnode, __entry->unique,
__print_symbolic(__entry->why, afs_edit_dir_reasons),
__print_symbolic(__entry->op, afs_edit_dir_ops),
@ -796,6 +1044,133 @@ TRACE_EVENT(afs_cm_no_server_u,
__entry->call, __entry->op_id, &__entry->uuid)
);
TRACE_EVENT(afs_flock_ev,
TP_PROTO(struct afs_vnode *vnode, struct file_lock *fl,
enum afs_flock_event event, int error),
TP_ARGS(vnode, fl, event, error),
TP_STRUCT__entry(
__field_struct(struct afs_fid, fid )
__field(enum afs_flock_event, event )
__field(enum afs_lock_state, state )
__field(int, error )
__field(unsigned int, debug_id )
),
TP_fast_assign(
__entry->fid = vnode->fid;
__entry->event = event;
__entry->state = vnode->lock_state;
__entry->error = error;
__entry->debug_id = fl ? fl->fl_u.afs.debug_id : 0;
),
TP_printk("%llx:%llx:%x %04x %s s=%s e=%d",
__entry->fid.vid, __entry->fid.vnode, __entry->fid.unique,
__entry->debug_id,
__print_symbolic(__entry->event, afs_flock_events),
__print_symbolic(__entry->state, afs_flock_states),
__entry->error)
);
TRACE_EVENT(afs_flock_op,
TP_PROTO(struct afs_vnode *vnode, struct file_lock *fl,
enum afs_flock_operation op),
TP_ARGS(vnode, fl, op),
TP_STRUCT__entry(
__field_struct(struct afs_fid, fid )
__field(loff_t, from )
__field(loff_t, len )
__field(enum afs_flock_operation, op )
__field(unsigned char, type )
__field(unsigned int, flags )
__field(unsigned int, debug_id )
),
TP_fast_assign(
__entry->fid = vnode->fid;
__entry->from = fl->fl_start;
__entry->len = fl->fl_end - fl->fl_start + 1;
__entry->op = op;
__entry->type = fl->fl_type;
__entry->flags = fl->fl_flags;
__entry->debug_id = fl->fl_u.afs.debug_id;
),
TP_printk("%llx:%llx:%x %04x %s t=%s R=%llx/%llx f=%x",
__entry->fid.vid, __entry->fid.vnode, __entry->fid.unique,
__entry->debug_id,
__print_symbolic(__entry->op, afs_flock_operations),
__print_symbolic(__entry->type, afs_flock_types),
__entry->from, __entry->len, __entry->flags)
);
TRACE_EVENT(afs_reload_dir,
TP_PROTO(struct afs_vnode *vnode),
TP_ARGS(vnode),
TP_STRUCT__entry(
__field_struct(struct afs_fid, fid )
),
TP_fast_assign(
__entry->fid = vnode->fid;
),
TP_printk("%llx:%llx:%x",
__entry->fid.vid, __entry->fid.vnode, __entry->fid.unique)
);
TRACE_EVENT(afs_silly_rename,
TP_PROTO(struct afs_vnode *vnode, bool done),
TP_ARGS(vnode, done),
TP_STRUCT__entry(
__field_struct(struct afs_fid, fid )
__field(bool, done )
),
TP_fast_assign(
__entry->fid = vnode->fid;
__entry->done = done;
),
TP_printk("%llx:%llx:%x done=%u",
__entry->fid.vid, __entry->fid.vnode, __entry->fid.unique,
__entry->done)
);
TRACE_EVENT(afs_get_tree,
TP_PROTO(struct afs_cell *cell, struct afs_volume *volume),
TP_ARGS(cell, volume),
TP_STRUCT__entry(
__field(u64, vid )
__array(char, cell, 24 )
__array(char, volume, 24 )
),
TP_fast_assign(
int __len;
__entry->vid = volume->vid;
__len = min_t(int, cell->name_len, 23);
memcpy(__entry->cell, cell->name, __len);
__entry->cell[__len] = 0;
__len = min_t(int, volume->name_len, 23);
memcpy(__entry->volume, volume->name, __len);
__entry->volume[__len] = 0;
),
TP_printk("--- MOUNT %s:%s %llx",
__entry->cell, __entry->volume, __entry->vid)
);
#endif /* _TRACE_AFS_H */
/* This part must be outside protection */