mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 09:19:51 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
Here is the 9p patches for the 6.3 merge window combining the tested and reviewed patches from both Dominique's for-next tree and my for-next tree. Most of these patches have been in for-next since December with only some reword in the description: - some fixes and cleanup setting up for a larger set of performance patches I've been working on - a contributed fixes relating to 9p/rdma - some contributed fixes relating to 9p/xen I've marked this as part 1, I'm not sure I'll be submitting part 2. There were several performance patches that I wanted to get in, but the revisions after review only went out last week so while they have been tested, I haven't received reviews on the revisions. Its been about a decade since I've submitted a pull request, sorry if I messed anything up. -eric -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEElpbw0ZalkJikytFRiP/V+0pf/5gFAmP/frIACgkQiP/V+0pf /5jb2w//dccypyaurk441RSdbsIVZUqf8aiGDzRSyX/iZBrUU4nmavdx8+qycpvc MVdD3WBiv7+PvdyYnt6EUGZYweGbI7vbVrpUpf20aq1q5A5oDWIR8K1EfrTUJQAd j69ALc4Qbq4FmX7kBOKYuj+qUvnnrcyDFQwTHTQ6o8d0MtpmW7MZr2kUiCDKeN3m 8K2uemR83Azjb2m5TvhWRSjb+61cf03W/Jw4+8PsbtfzX8MyGblqUsgODi35IdiJ c2aO+JF0Cw4y9ulw7PR9SkX0yi6CY4Ll/pGV9xW0liIs6E6FQboiwczr+SZNzQoc TUC3S7bGSyodiCNTp685sK3KfHaxj5QHBvilUL/t7cgjOWwWSkl8neg9sbI8Bc7P WxQ4p6cqnMXMJiHAxk70QfIvCsabLSfTjBhN5zAUwjLmjQsxboFWHloKwndea49v 32NHEhGwEt7QSE1WHdJ4m6xfuNRSayriOoQ28Yxyg8ekpK+7bWkI8CXGS3Cq9kGQ SGhX/UZqT5J1YCvBAwh9s7d5hhHUBxaVz74Pssvbd/PkeKI0CiXFoJM5cu32F+p2 4gsY67NcyUjJZOq0NsUxFTqQXw4jdrnkcrnGD4istRFyDMf/3hhuV/F+SvPhBn0l GdMDwXjEkZLSYQi14TADp/V5DfDzRGRpquo++XbqikQyAgoNcKI= =Cvvf -----END PGP SIGNATURE----- Merge tag '9p-6.3-for-linus-part1' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs Pull 9p updates from Eric Van Hensbergen: - some fixes and cleanup setting up for a larger set of performance patches I've been working on - a contributed fixes relating to 9p/rdma - some contributed fixes relating to 9p/xen * tag '9p-6.3-for-linus-part1' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs: fs/9p: fix error reporting in v9fs_dir_release net/9p: fix bug in client create for .L 9p/rdma: unmap receive dma buffer in rdma_request()/post_recv() 9p/xen: fix connection sequence 9p/xen: fix version parsing fs/9p: Expand setup of writeback cache to all levels net/9p: Adjust maximum MSIZE to account for p9 header
1005 lines
25 KiB
C
1005 lines
25 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* This file contains vfs inode ops for the 9P2000.L protocol.
|
|
*
|
|
* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
|
|
* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/file.h>
|
|
#include <linux/pagemap.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/string.h>
|
|
#include <linux/inet.h>
|
|
#include <linux/namei.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/xattr.h>
|
|
#include <linux/posix_acl.h>
|
|
#include <net/9p/9p.h>
|
|
#include <net/9p/client.h>
|
|
|
|
#include "v9fs.h"
|
|
#include "v9fs_vfs.h"
|
|
#include "fid.h"
|
|
#include "cache.h"
|
|
#include "xattr.h"
|
|
#include "acl.h"
|
|
|
|
static int
|
|
v9fs_vfs_mknod_dotl(struct mnt_idmap *idmap, struct inode *dir,
|
|
struct dentry *dentry, umode_t omode, dev_t rdev);
|
|
|
|
/**
|
|
* v9fs_get_fsgid_for_create - Helper function to get the gid for a new object
|
|
* @dir_inode: The directory inode
|
|
*
|
|
* Helper function to get the gid for creating a
|
|
* new file system object. This checks the S_ISGID to determine the owning
|
|
* group of the new file system object.
|
|
*/
|
|
|
|
static kgid_t v9fs_get_fsgid_for_create(struct inode *dir_inode)
|
|
{
|
|
BUG_ON(dir_inode == NULL);
|
|
|
|
if (dir_inode->i_mode & S_ISGID) {
|
|
/* set_gid bit is set.*/
|
|
return dir_inode->i_gid;
|
|
}
|
|
return current_fsgid();
|
|
}
|
|
|
|
static int v9fs_test_inode_dotl(struct inode *inode, void *data)
|
|
{
|
|
struct v9fs_inode *v9inode = V9FS_I(inode);
|
|
struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
|
|
|
|
/* don't match inode of different type */
|
|
if (inode_wrong_type(inode, st->st_mode))
|
|
return 0;
|
|
|
|
if (inode->i_generation != st->st_gen)
|
|
return 0;
|
|
|
|
/* compare qid details */
|
|
if (memcmp(&v9inode->qid.version,
|
|
&st->qid.version, sizeof(v9inode->qid.version)))
|
|
return 0;
|
|
|
|
if (v9inode->qid.type != st->qid.type)
|
|
return 0;
|
|
|
|
if (v9inode->qid.path != st->qid.path)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
/* Always get a new inode */
|
|
static int v9fs_test_new_inode_dotl(struct inode *inode, void *data)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int v9fs_set_inode_dotl(struct inode *inode, void *data)
|
|
{
|
|
struct v9fs_inode *v9inode = V9FS_I(inode);
|
|
struct p9_stat_dotl *st = (struct p9_stat_dotl *)data;
|
|
|
|
memcpy(&v9inode->qid, &st->qid, sizeof(st->qid));
|
|
inode->i_generation = st->st_gen;
|
|
return 0;
|
|
}
|
|
|
|
static struct inode *v9fs_qid_iget_dotl(struct super_block *sb,
|
|
struct p9_qid *qid,
|
|
struct p9_fid *fid,
|
|
struct p9_stat_dotl *st,
|
|
int new)
|
|
{
|
|
int retval;
|
|
unsigned long i_ino;
|
|
struct inode *inode;
|
|
struct v9fs_session_info *v9ses = sb->s_fs_info;
|
|
int (*test)(struct inode *inode, void *data);
|
|
|
|
if (new)
|
|
test = v9fs_test_new_inode_dotl;
|
|
else
|
|
test = v9fs_test_inode_dotl;
|
|
|
|
i_ino = v9fs_qid2ino(qid);
|
|
inode = iget5_locked(sb, i_ino, test, v9fs_set_inode_dotl, st);
|
|
if (!inode)
|
|
return ERR_PTR(-ENOMEM);
|
|
if (!(inode->i_state & I_NEW))
|
|
return inode;
|
|
/*
|
|
* initialize the inode with the stat info
|
|
* FIXME!! we may need support for stale inodes
|
|
* later.
|
|
*/
|
|
inode->i_ino = i_ino;
|
|
retval = v9fs_init_inode(v9ses, inode,
|
|
st->st_mode, new_decode_dev(st->st_rdev));
|
|
if (retval)
|
|
goto error;
|
|
|
|
v9fs_stat2inode_dotl(st, inode, 0);
|
|
v9fs_cache_inode_get_cookie(inode);
|
|
retval = v9fs_get_acl(inode, fid);
|
|
if (retval)
|
|
goto error;
|
|
|
|
unlock_new_inode(inode);
|
|
return inode;
|
|
error:
|
|
iget_failed(inode);
|
|
return ERR_PTR(retval);
|
|
|
|
}
|
|
|
|
struct inode *
|
|
v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
|
|
struct super_block *sb, int new)
|
|
{
|
|
struct p9_stat_dotl *st;
|
|
struct inode *inode = NULL;
|
|
|
|
st = p9_client_getattr_dotl(fid, P9_STATS_BASIC | P9_STATS_GEN);
|
|
if (IS_ERR(st))
|
|
return ERR_CAST(st);
|
|
|
|
inode = v9fs_qid_iget_dotl(sb, &st->qid, fid, st, new);
|
|
kfree(st);
|
|
return inode;
|
|
}
|
|
|
|
struct dotl_openflag_map {
|
|
int open_flag;
|
|
int dotl_flag;
|
|
};
|
|
|
|
static int v9fs_mapped_dotl_flags(int flags)
|
|
{
|
|
int i;
|
|
int rflags = 0;
|
|
struct dotl_openflag_map dotl_oflag_map[] = {
|
|
{ O_CREAT, P9_DOTL_CREATE },
|
|
{ O_EXCL, P9_DOTL_EXCL },
|
|
{ O_NOCTTY, P9_DOTL_NOCTTY },
|
|
{ O_APPEND, P9_DOTL_APPEND },
|
|
{ O_NONBLOCK, P9_DOTL_NONBLOCK },
|
|
{ O_DSYNC, P9_DOTL_DSYNC },
|
|
{ FASYNC, P9_DOTL_FASYNC },
|
|
{ O_DIRECT, P9_DOTL_DIRECT },
|
|
{ O_LARGEFILE, P9_DOTL_LARGEFILE },
|
|
{ O_DIRECTORY, P9_DOTL_DIRECTORY },
|
|
{ O_NOFOLLOW, P9_DOTL_NOFOLLOW },
|
|
{ O_NOATIME, P9_DOTL_NOATIME },
|
|
{ O_CLOEXEC, P9_DOTL_CLOEXEC },
|
|
{ O_SYNC, P9_DOTL_SYNC},
|
|
};
|
|
for (i = 0; i < ARRAY_SIZE(dotl_oflag_map); i++) {
|
|
if (flags & dotl_oflag_map[i].open_flag)
|
|
rflags |= dotl_oflag_map[i].dotl_flag;
|
|
}
|
|
return rflags;
|
|
}
|
|
|
|
/**
|
|
* v9fs_open_to_dotl_flags- convert Linux specific open flags to
|
|
* plan 9 open flag.
|
|
* @flags: flags to convert
|
|
*/
|
|
int v9fs_open_to_dotl_flags(int flags)
|
|
{
|
|
int rflags = 0;
|
|
|
|
/*
|
|
* We have same bits for P9_DOTL_READONLY, P9_DOTL_WRONLY
|
|
* and P9_DOTL_NOACCESS
|
|
*/
|
|
rflags |= flags & O_ACCMODE;
|
|
rflags |= v9fs_mapped_dotl_flags(flags);
|
|
|
|
return rflags;
|
|
}
|
|
|
|
/**
|
|
* v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol.
|
|
* @idmap: The user namespace of the mount
|
|
* @dir: directory inode that is being created
|
|
* @dentry: dentry that is being deleted
|
|
* @omode: create permissions
|
|
* @excl: True if the file must not yet exist
|
|
*
|
|
*/
|
|
static int
|
|
v9fs_vfs_create_dotl(struct mnt_idmap *idmap, struct inode *dir,
|
|
struct dentry *dentry, umode_t omode, bool excl)
|
|
{
|
|
return v9fs_vfs_mknod_dotl(idmap, dir, dentry, omode, 0);
|
|
}
|
|
|
|
static int
|
|
v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
|
|
struct file *file, unsigned int flags, umode_t omode)
|
|
{
|
|
int err = 0;
|
|
kgid_t gid;
|
|
umode_t mode;
|
|
const unsigned char *name = NULL;
|
|
struct p9_qid qid;
|
|
struct inode *inode;
|
|
struct p9_fid *fid = NULL;
|
|
struct v9fs_inode *v9inode;
|
|
struct p9_fid *dfid = NULL, *ofid = NULL, *inode_fid = NULL;
|
|
struct v9fs_session_info *v9ses;
|
|
struct posix_acl *pacl = NULL, *dacl = NULL;
|
|
struct dentry *res = NULL;
|
|
|
|
if (d_in_lookup(dentry)) {
|
|
res = v9fs_vfs_lookup(dir, dentry, 0);
|
|
if (IS_ERR(res))
|
|
return PTR_ERR(res);
|
|
|
|
if (res)
|
|
dentry = res;
|
|
}
|
|
|
|
/* Only creates */
|
|
if (!(flags & O_CREAT) || d_really_is_positive(dentry))
|
|
return finish_no_open(file, res);
|
|
|
|
v9ses = v9fs_inode2v9ses(dir);
|
|
|
|
name = dentry->d_name.name;
|
|
p9_debug(P9_DEBUG_VFS, "name:%s flags:0x%x mode:0x%x\n",
|
|
name, flags, omode);
|
|
|
|
dfid = v9fs_parent_fid(dentry);
|
|
if (IS_ERR(dfid)) {
|
|
err = PTR_ERR(dfid);
|
|
p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
|
|
goto out;
|
|
}
|
|
|
|
/* clone a fid to use for creation */
|
|
ofid = clone_fid(dfid);
|
|
if (IS_ERR(ofid)) {
|
|
err = PTR_ERR(ofid);
|
|
p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
|
|
goto out;
|
|
}
|
|
|
|
gid = v9fs_get_fsgid_for_create(dir);
|
|
|
|
mode = omode;
|
|
/* Update mode based on ACL value */
|
|
err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
|
|
if (err) {
|
|
p9_debug(P9_DEBUG_VFS, "Failed to get acl values in creat %d\n",
|
|
err);
|
|
goto out;
|
|
}
|
|
err = p9_client_create_dotl(ofid, name, v9fs_open_to_dotl_flags(flags),
|
|
mode, gid, &qid);
|
|
if (err < 0) {
|
|
p9_debug(P9_DEBUG_VFS, "p9_client_open_dotl failed in creat %d\n",
|
|
err);
|
|
goto out;
|
|
}
|
|
v9fs_invalidate_inode_attr(dir);
|
|
|
|
/* instantiate inode and assign the unopened fid to the dentry */
|
|
fid = p9_client_walk(dfid, 1, &name, 1);
|
|
if (IS_ERR(fid)) {
|
|
err = PTR_ERR(fid);
|
|
p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
|
|
goto out;
|
|
}
|
|
inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n", err);
|
|
goto out;
|
|
}
|
|
/* Now set the ACL based on the default value */
|
|
v9fs_set_create_acl(inode, fid, dacl, pacl);
|
|
|
|
v9fs_fid_add(dentry, &fid);
|
|
d_instantiate(dentry, inode);
|
|
|
|
v9inode = V9FS_I(inode);
|
|
mutex_lock(&v9inode->v_mutex);
|
|
if ((v9ses->cache) && !v9inode->writeback_fid &&
|
|
((flags & O_ACCMODE) != O_RDONLY)) {
|
|
/*
|
|
* clone a fid and add it to writeback_fid
|
|
* we do it during open time instead of
|
|
* page dirty time via write_begin/page_mkwrite
|
|
* because we want write after unlink usecase
|
|
* to work.
|
|
*/
|
|
inode_fid = v9fs_writeback_fid(dentry);
|
|
if (IS_ERR(inode_fid)) {
|
|
err = PTR_ERR(inode_fid);
|
|
mutex_unlock(&v9inode->v_mutex);
|
|
goto out;
|
|
}
|
|
v9inode->writeback_fid = (void *) inode_fid;
|
|
}
|
|
mutex_unlock(&v9inode->v_mutex);
|
|
/* Since we are opening a file, assign the open fid to the file */
|
|
err = finish_open(file, dentry, generic_file_open);
|
|
if (err)
|
|
goto out;
|
|
file->private_data = ofid;
|
|
#ifdef CONFIG_9P_FSCACHE
|
|
if (v9ses->cache == CACHE_FSCACHE)
|
|
fscache_use_cookie(v9fs_inode_cookie(v9inode),
|
|
file->f_mode & FMODE_WRITE);
|
|
#endif
|
|
v9fs_open_fid_add(inode, &ofid);
|
|
file->f_mode |= FMODE_CREATED;
|
|
out:
|
|
p9_fid_put(dfid);
|
|
p9_fid_put(ofid);
|
|
p9_fid_put(fid);
|
|
v9fs_put_acl(dacl, pacl);
|
|
dput(res);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory
|
|
* @idmap: The idmap of the mount
|
|
* @dir: inode that is being unlinked
|
|
* @dentry: dentry that is being unlinked
|
|
* @omode: mode for new directory
|
|
*
|
|
*/
|
|
|
|
static int v9fs_vfs_mkdir_dotl(struct mnt_idmap *idmap,
|
|
struct inode *dir, struct dentry *dentry,
|
|
umode_t omode)
|
|
{
|
|
int err;
|
|
struct v9fs_session_info *v9ses;
|
|
struct p9_fid *fid = NULL, *dfid = NULL;
|
|
kgid_t gid;
|
|
const unsigned char *name;
|
|
umode_t mode;
|
|
struct inode *inode;
|
|
struct p9_qid qid;
|
|
struct posix_acl *dacl = NULL, *pacl = NULL;
|
|
|
|
p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);
|
|
err = 0;
|
|
v9ses = v9fs_inode2v9ses(dir);
|
|
|
|
omode |= S_IFDIR;
|
|
if (dir->i_mode & S_ISGID)
|
|
omode |= S_ISGID;
|
|
|
|
dfid = v9fs_parent_fid(dentry);
|
|
if (IS_ERR(dfid)) {
|
|
err = PTR_ERR(dfid);
|
|
p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
|
|
goto error;
|
|
}
|
|
|
|
gid = v9fs_get_fsgid_for_create(dir);
|
|
mode = omode;
|
|
/* Update mode based on ACL value */
|
|
err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
|
|
if (err) {
|
|
p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mkdir %d\n",
|
|
err);
|
|
goto error;
|
|
}
|
|
name = dentry->d_name.name;
|
|
err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);
|
|
if (err < 0)
|
|
goto error;
|
|
fid = p9_client_walk(dfid, 1, &name, 1);
|
|
if (IS_ERR(fid)) {
|
|
err = PTR_ERR(fid);
|
|
p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
|
|
err);
|
|
goto error;
|
|
}
|
|
|
|
/* instantiate inode and assign the unopened fid to the dentry */
|
|
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
|
|
inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
|
|
err);
|
|
goto error;
|
|
}
|
|
v9fs_fid_add(dentry, &fid);
|
|
v9fs_set_create_acl(inode, fid, dacl, pacl);
|
|
d_instantiate(dentry, inode);
|
|
err = 0;
|
|
} else {
|
|
/*
|
|
* Not in cached mode. No need to populate
|
|
* inode with stat. We need to get an inode
|
|
* so that we can set the acl with dentry
|
|
*/
|
|
inode = v9fs_get_inode(dir->i_sb, mode, 0);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
goto error;
|
|
}
|
|
v9fs_set_create_acl(inode, fid, dacl, pacl);
|
|
d_instantiate(dentry, inode);
|
|
}
|
|
inc_nlink(dir);
|
|
v9fs_invalidate_inode_attr(dir);
|
|
error:
|
|
p9_fid_put(fid);
|
|
v9fs_put_acl(dacl, pacl);
|
|
p9_fid_put(dfid);
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
v9fs_vfs_getattr_dotl(struct mnt_idmap *idmap,
|
|
const struct path *path, struct kstat *stat,
|
|
u32 request_mask, unsigned int flags)
|
|
{
|
|
struct dentry *dentry = path->dentry;
|
|
struct v9fs_session_info *v9ses;
|
|
struct p9_fid *fid;
|
|
struct p9_stat_dotl *st;
|
|
|
|
p9_debug(P9_DEBUG_VFS, "dentry: %p\n", dentry);
|
|
v9ses = v9fs_dentry2v9ses(dentry);
|
|
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
|
|
generic_fillattr(&nop_mnt_idmap, d_inode(dentry), stat);
|
|
return 0;
|
|
}
|
|
fid = v9fs_fid_lookup(dentry);
|
|
if (IS_ERR(fid))
|
|
return PTR_ERR(fid);
|
|
|
|
/* Ask for all the fields in stat structure. Server will return
|
|
* whatever it supports
|
|
*/
|
|
|
|
st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
|
|
p9_fid_put(fid);
|
|
if (IS_ERR(st))
|
|
return PTR_ERR(st);
|
|
|
|
v9fs_stat2inode_dotl(st, d_inode(dentry), 0);
|
|
generic_fillattr(&nop_mnt_idmap, d_inode(dentry), stat);
|
|
/* Change block size to what the server returned */
|
|
stat->blksize = st->st_blksize;
|
|
|
|
kfree(st);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Attribute flags.
|
|
*/
|
|
#define P9_ATTR_MODE (1 << 0)
|
|
#define P9_ATTR_UID (1 << 1)
|
|
#define P9_ATTR_GID (1 << 2)
|
|
#define P9_ATTR_SIZE (1 << 3)
|
|
#define P9_ATTR_ATIME (1 << 4)
|
|
#define P9_ATTR_MTIME (1 << 5)
|
|
#define P9_ATTR_CTIME (1 << 6)
|
|
#define P9_ATTR_ATIME_SET (1 << 7)
|
|
#define P9_ATTR_MTIME_SET (1 << 8)
|
|
|
|
struct dotl_iattr_map {
|
|
int iattr_valid;
|
|
int p9_iattr_valid;
|
|
};
|
|
|
|
static int v9fs_mapped_iattr_valid(int iattr_valid)
|
|
{
|
|
int i;
|
|
int p9_iattr_valid = 0;
|
|
struct dotl_iattr_map dotl_iattr_map[] = {
|
|
{ ATTR_MODE, P9_ATTR_MODE },
|
|
{ ATTR_UID, P9_ATTR_UID },
|
|
{ ATTR_GID, P9_ATTR_GID },
|
|
{ ATTR_SIZE, P9_ATTR_SIZE },
|
|
{ ATTR_ATIME, P9_ATTR_ATIME },
|
|
{ ATTR_MTIME, P9_ATTR_MTIME },
|
|
{ ATTR_CTIME, P9_ATTR_CTIME },
|
|
{ ATTR_ATIME_SET, P9_ATTR_ATIME_SET },
|
|
{ ATTR_MTIME_SET, P9_ATTR_MTIME_SET },
|
|
};
|
|
for (i = 0; i < ARRAY_SIZE(dotl_iattr_map); i++) {
|
|
if (iattr_valid & dotl_iattr_map[i].iattr_valid)
|
|
p9_iattr_valid |= dotl_iattr_map[i].p9_iattr_valid;
|
|
}
|
|
return p9_iattr_valid;
|
|
}
|
|
|
|
/**
|
|
* v9fs_vfs_setattr_dotl - set file metadata
|
|
* @idmap: idmap of the mount
|
|
* @dentry: file whose metadata to set
|
|
* @iattr: metadata assignment structure
|
|
*
|
|
*/
|
|
|
|
int v9fs_vfs_setattr_dotl(struct mnt_idmap *idmap,
|
|
struct dentry *dentry, struct iattr *iattr)
|
|
{
|
|
int retval, use_dentry = 0;
|
|
struct p9_fid *fid = NULL;
|
|
struct p9_iattr_dotl p9attr = {
|
|
.uid = INVALID_UID,
|
|
.gid = INVALID_GID,
|
|
};
|
|
struct inode *inode = d_inode(dentry);
|
|
|
|
p9_debug(P9_DEBUG_VFS, "\n");
|
|
|
|
retval = setattr_prepare(&nop_mnt_idmap, dentry, iattr);
|
|
if (retval)
|
|
return retval;
|
|
|
|
p9attr.valid = v9fs_mapped_iattr_valid(iattr->ia_valid);
|
|
if (iattr->ia_valid & ATTR_MODE)
|
|
p9attr.mode = iattr->ia_mode;
|
|
if (iattr->ia_valid & ATTR_UID)
|
|
p9attr.uid = iattr->ia_uid;
|
|
if (iattr->ia_valid & ATTR_GID)
|
|
p9attr.gid = iattr->ia_gid;
|
|
if (iattr->ia_valid & ATTR_SIZE)
|
|
p9attr.size = iattr->ia_size;
|
|
if (iattr->ia_valid & ATTR_ATIME_SET) {
|
|
p9attr.atime_sec = iattr->ia_atime.tv_sec;
|
|
p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
|
|
}
|
|
if (iattr->ia_valid & ATTR_MTIME_SET) {
|
|
p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
|
|
p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
|
|
}
|
|
|
|
if (iattr->ia_valid & ATTR_FILE) {
|
|
fid = iattr->ia_file->private_data;
|
|
WARN_ON(!fid);
|
|
}
|
|
if (!fid) {
|
|
fid = v9fs_fid_lookup(dentry);
|
|
use_dentry = 1;
|
|
}
|
|
if (IS_ERR(fid))
|
|
return PTR_ERR(fid);
|
|
|
|
/* Write all dirty data */
|
|
if (S_ISREG(inode->i_mode))
|
|
filemap_write_and_wait(inode->i_mapping);
|
|
|
|
retval = p9_client_setattr(fid, &p9attr);
|
|
if (retval < 0) {
|
|
if (use_dentry)
|
|
p9_fid_put(fid);
|
|
return retval;
|
|
}
|
|
|
|
if ((iattr->ia_valid & ATTR_SIZE) &&
|
|
iattr->ia_size != i_size_read(inode))
|
|
truncate_setsize(inode, iattr->ia_size);
|
|
|
|
v9fs_invalidate_inode_attr(inode);
|
|
setattr_copy(&nop_mnt_idmap, inode, iattr);
|
|
mark_inode_dirty(inode);
|
|
if (iattr->ia_valid & ATTR_MODE) {
|
|
/* We also want to update ACL when we update mode bits */
|
|
retval = v9fs_acl_chmod(inode, fid);
|
|
if (retval < 0) {
|
|
if (use_dentry)
|
|
p9_fid_put(fid);
|
|
return retval;
|
|
}
|
|
}
|
|
if (use_dentry)
|
|
p9_fid_put(fid);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* v9fs_stat2inode_dotl - populate an inode structure with stat info
|
|
* @stat: stat structure
|
|
* @inode: inode to populate
|
|
* @flags: ctrl flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE)
|
|
*
|
|
*/
|
|
|
|
void
|
|
v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode,
|
|
unsigned int flags)
|
|
{
|
|
umode_t mode;
|
|
struct v9fs_inode *v9inode = V9FS_I(inode);
|
|
|
|
if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
|
|
inode->i_atime.tv_sec = stat->st_atime_sec;
|
|
inode->i_atime.tv_nsec = stat->st_atime_nsec;
|
|
inode->i_mtime.tv_sec = stat->st_mtime_sec;
|
|
inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
|
|
inode->i_ctime.tv_sec = stat->st_ctime_sec;
|
|
inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
|
|
inode->i_uid = stat->st_uid;
|
|
inode->i_gid = stat->st_gid;
|
|
set_nlink(inode, stat->st_nlink);
|
|
|
|
mode = stat->st_mode & S_IALLUGO;
|
|
mode |= inode->i_mode & ~S_IALLUGO;
|
|
inode->i_mode = mode;
|
|
|
|
if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE))
|
|
v9fs_i_size_write(inode, stat->st_size);
|
|
inode->i_blocks = stat->st_blocks;
|
|
} else {
|
|
if (stat->st_result_mask & P9_STATS_ATIME) {
|
|
inode->i_atime.tv_sec = stat->st_atime_sec;
|
|
inode->i_atime.tv_nsec = stat->st_atime_nsec;
|
|
}
|
|
if (stat->st_result_mask & P9_STATS_MTIME) {
|
|
inode->i_mtime.tv_sec = stat->st_mtime_sec;
|
|
inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
|
|
}
|
|
if (stat->st_result_mask & P9_STATS_CTIME) {
|
|
inode->i_ctime.tv_sec = stat->st_ctime_sec;
|
|
inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
|
|
}
|
|
if (stat->st_result_mask & P9_STATS_UID)
|
|
inode->i_uid = stat->st_uid;
|
|
if (stat->st_result_mask & P9_STATS_GID)
|
|
inode->i_gid = stat->st_gid;
|
|
if (stat->st_result_mask & P9_STATS_NLINK)
|
|
set_nlink(inode, stat->st_nlink);
|
|
if (stat->st_result_mask & P9_STATS_MODE) {
|
|
mode = stat->st_mode & S_IALLUGO;
|
|
mode |= inode->i_mode & ~S_IALLUGO;
|
|
inode->i_mode = mode;
|
|
}
|
|
if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE) &&
|
|
stat->st_result_mask & P9_STATS_SIZE)
|
|
v9fs_i_size_write(inode, stat->st_size);
|
|
if (stat->st_result_mask & P9_STATS_BLOCKS)
|
|
inode->i_blocks = stat->st_blocks;
|
|
}
|
|
if (stat->st_result_mask & P9_STATS_GEN)
|
|
inode->i_generation = stat->st_gen;
|
|
|
|
/* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
|
|
* because the inode structure does not have fields for them.
|
|
*/
|
|
v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
|
|
}
|
|
|
|
static int
|
|
v9fs_vfs_symlink_dotl(struct mnt_idmap *idmap, struct inode *dir,
|
|
struct dentry *dentry, const char *symname)
|
|
{
|
|
int err;
|
|
kgid_t gid;
|
|
const unsigned char *name;
|
|
struct p9_qid qid;
|
|
struct inode *inode;
|
|
struct p9_fid *dfid;
|
|
struct p9_fid *fid = NULL;
|
|
struct v9fs_session_info *v9ses;
|
|
|
|
name = dentry->d_name.name;
|
|
p9_debug(P9_DEBUG_VFS, "%lu,%s,%s\n", dir->i_ino, name, symname);
|
|
v9ses = v9fs_inode2v9ses(dir);
|
|
|
|
dfid = v9fs_parent_fid(dentry);
|
|
if (IS_ERR(dfid)) {
|
|
err = PTR_ERR(dfid);
|
|
p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
gid = v9fs_get_fsgid_for_create(dir);
|
|
|
|
/* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */
|
|
err = p9_client_symlink(dfid, name, symname, gid, &qid);
|
|
|
|
if (err < 0) {
|
|
p9_debug(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err);
|
|
goto error;
|
|
}
|
|
|
|
v9fs_invalidate_inode_attr(dir);
|
|
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
|
|
/* Now walk from the parent so we can get an unopened fid. */
|
|
fid = p9_client_walk(dfid, 1, &name, 1);
|
|
if (IS_ERR(fid)) {
|
|
err = PTR_ERR(fid);
|
|
p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
|
|
err);
|
|
goto error;
|
|
}
|
|
|
|
/* instantiate inode and assign the unopened fid to dentry */
|
|
inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
|
|
err);
|
|
goto error;
|
|
}
|
|
v9fs_fid_add(dentry, &fid);
|
|
d_instantiate(dentry, inode);
|
|
err = 0;
|
|
} else {
|
|
/* Not in cached mode. No need to populate inode with stat */
|
|
inode = v9fs_get_inode(dir->i_sb, S_IFLNK, 0);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
goto error;
|
|
}
|
|
d_instantiate(dentry, inode);
|
|
}
|
|
|
|
error:
|
|
p9_fid_put(fid);
|
|
p9_fid_put(dfid);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* v9fs_vfs_link_dotl - create a hardlink for dotl
|
|
* @old_dentry: dentry for file to link to
|
|
* @dir: inode destination for new link
|
|
* @dentry: dentry for link
|
|
*
|
|
*/
|
|
|
|
static int
|
|
v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
|
|
struct dentry *dentry)
|
|
{
|
|
int err;
|
|
struct p9_fid *dfid, *oldfid;
|
|
struct v9fs_session_info *v9ses;
|
|
|
|
p9_debug(P9_DEBUG_VFS, "dir ino: %lu, old_name: %pd, new_name: %pd\n",
|
|
dir->i_ino, old_dentry, dentry);
|
|
|
|
v9ses = v9fs_inode2v9ses(dir);
|
|
dfid = v9fs_parent_fid(dentry);
|
|
if (IS_ERR(dfid))
|
|
return PTR_ERR(dfid);
|
|
|
|
oldfid = v9fs_fid_lookup(old_dentry);
|
|
if (IS_ERR(oldfid)) {
|
|
p9_fid_put(dfid);
|
|
return PTR_ERR(oldfid);
|
|
}
|
|
|
|
err = p9_client_link(dfid, oldfid, dentry->d_name.name);
|
|
|
|
p9_fid_put(dfid);
|
|
p9_fid_put(oldfid);
|
|
if (err < 0) {
|
|
p9_debug(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
v9fs_invalidate_inode_attr(dir);
|
|
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
|
|
/* Get the latest stat info from server. */
|
|
struct p9_fid *fid;
|
|
|
|
fid = v9fs_fid_lookup(old_dentry);
|
|
if (IS_ERR(fid))
|
|
return PTR_ERR(fid);
|
|
|
|
v9fs_refresh_inode_dotl(fid, d_inode(old_dentry));
|
|
p9_fid_put(fid);
|
|
}
|
|
ihold(d_inode(old_dentry));
|
|
d_instantiate(dentry, d_inode(old_dentry));
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* v9fs_vfs_mknod_dotl - create a special file
|
|
* @idmap: The idmap of the mount
|
|
* @dir: inode destination for new link
|
|
* @dentry: dentry for file
|
|
* @omode: mode for creation
|
|
* @rdev: device associated with special file
|
|
*
|
|
*/
|
|
static int
|
|
v9fs_vfs_mknod_dotl(struct mnt_idmap *idmap, struct inode *dir,
|
|
struct dentry *dentry, umode_t omode, dev_t rdev)
|
|
{
|
|
int err;
|
|
kgid_t gid;
|
|
const unsigned char *name;
|
|
umode_t mode;
|
|
struct v9fs_session_info *v9ses;
|
|
struct p9_fid *fid = NULL, *dfid = NULL;
|
|
struct inode *inode;
|
|
struct p9_qid qid;
|
|
struct posix_acl *dacl = NULL, *pacl = NULL;
|
|
|
|
p9_debug(P9_DEBUG_VFS, " %lu,%pd mode: %x MAJOR: %u MINOR: %u\n",
|
|
dir->i_ino, dentry, omode,
|
|
MAJOR(rdev), MINOR(rdev));
|
|
|
|
v9ses = v9fs_inode2v9ses(dir);
|
|
dfid = v9fs_parent_fid(dentry);
|
|
if (IS_ERR(dfid)) {
|
|
err = PTR_ERR(dfid);
|
|
p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
|
|
goto error;
|
|
}
|
|
|
|
gid = v9fs_get_fsgid_for_create(dir);
|
|
mode = omode;
|
|
/* Update mode based on ACL value */
|
|
err = v9fs_acl_mode(dir, &mode, &dacl, &pacl);
|
|
if (err) {
|
|
p9_debug(P9_DEBUG_VFS, "Failed to get acl values in mknod %d\n",
|
|
err);
|
|
goto error;
|
|
}
|
|
name = dentry->d_name.name;
|
|
|
|
err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid);
|
|
if (err < 0)
|
|
goto error;
|
|
|
|
v9fs_invalidate_inode_attr(dir);
|
|
fid = p9_client_walk(dfid, 1, &name, 1);
|
|
if (IS_ERR(fid)) {
|
|
err = PTR_ERR(fid);
|
|
p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n",
|
|
err);
|
|
goto error;
|
|
}
|
|
|
|
/* instantiate inode and assign the unopened fid to the dentry */
|
|
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
|
|
inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
p9_debug(P9_DEBUG_VFS, "inode creation failed %d\n",
|
|
err);
|
|
goto error;
|
|
}
|
|
v9fs_set_create_acl(inode, fid, dacl, pacl);
|
|
v9fs_fid_add(dentry, &fid);
|
|
d_instantiate(dentry, inode);
|
|
err = 0;
|
|
} else {
|
|
/*
|
|
* Not in cached mode. No need to populate inode with stat.
|
|
* socket syscall returns a fd, so we need instantiate
|
|
*/
|
|
inode = v9fs_get_inode(dir->i_sb, mode, rdev);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
goto error;
|
|
}
|
|
v9fs_set_create_acl(inode, fid, dacl, pacl);
|
|
d_instantiate(dentry, inode);
|
|
}
|
|
error:
|
|
p9_fid_put(fid);
|
|
v9fs_put_acl(dacl, pacl);
|
|
p9_fid_put(dfid);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* v9fs_vfs_get_link_dotl - follow a symlink path
|
|
* @dentry: dentry for symlink
|
|
* @inode: inode for symlink
|
|
* @done: destructor for return value
|
|
*/
|
|
|
|
static const char *
|
|
v9fs_vfs_get_link_dotl(struct dentry *dentry,
|
|
struct inode *inode,
|
|
struct delayed_call *done)
|
|
{
|
|
struct p9_fid *fid;
|
|
char *target;
|
|
int retval;
|
|
|
|
if (!dentry)
|
|
return ERR_PTR(-ECHILD);
|
|
|
|
p9_debug(P9_DEBUG_VFS, "%pd\n", dentry);
|
|
|
|
fid = v9fs_fid_lookup(dentry);
|
|
if (IS_ERR(fid))
|
|
return ERR_CAST(fid);
|
|
retval = p9_client_readlink(fid, &target);
|
|
p9_fid_put(fid);
|
|
if (retval)
|
|
return ERR_PTR(retval);
|
|
set_delayed_call(done, kfree_link, target);
|
|
return target;
|
|
}
|
|
|
|
int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
|
|
{
|
|
struct p9_stat_dotl *st;
|
|
struct v9fs_session_info *v9ses;
|
|
unsigned int flags;
|
|
|
|
v9ses = v9fs_inode2v9ses(inode);
|
|
st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
|
|
if (IS_ERR(st))
|
|
return PTR_ERR(st);
|
|
/*
|
|
* Don't update inode if the file type is different
|
|
*/
|
|
if (inode_wrong_type(inode, st->st_mode))
|
|
goto out;
|
|
|
|
/*
|
|
* We don't want to refresh inode->i_size,
|
|
* because we may have cached data
|
|
*/
|
|
flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ?
|
|
V9FS_STAT2INODE_KEEP_ISIZE : 0;
|
|
v9fs_stat2inode_dotl(st, inode, flags);
|
|
out:
|
|
kfree(st);
|
|
return 0;
|
|
}
|
|
|
|
const struct inode_operations v9fs_dir_inode_operations_dotl = {
|
|
.create = v9fs_vfs_create_dotl,
|
|
.atomic_open = v9fs_vfs_atomic_open_dotl,
|
|
.lookup = v9fs_vfs_lookup,
|
|
.link = v9fs_vfs_link_dotl,
|
|
.symlink = v9fs_vfs_symlink_dotl,
|
|
.unlink = v9fs_vfs_unlink,
|
|
.mkdir = v9fs_vfs_mkdir_dotl,
|
|
.rmdir = v9fs_vfs_rmdir,
|
|
.mknod = v9fs_vfs_mknod_dotl,
|
|
.rename = v9fs_vfs_rename,
|
|
.getattr = v9fs_vfs_getattr_dotl,
|
|
.setattr = v9fs_vfs_setattr_dotl,
|
|
.listxattr = v9fs_listxattr,
|
|
.get_inode_acl = v9fs_iop_get_inode_acl,
|
|
.get_acl = v9fs_iop_get_acl,
|
|
.set_acl = v9fs_iop_set_acl,
|
|
};
|
|
|
|
const struct inode_operations v9fs_file_inode_operations_dotl = {
|
|
.getattr = v9fs_vfs_getattr_dotl,
|
|
.setattr = v9fs_vfs_setattr_dotl,
|
|
.listxattr = v9fs_listxattr,
|
|
.get_inode_acl = v9fs_iop_get_inode_acl,
|
|
.get_acl = v9fs_iop_get_acl,
|
|
.set_acl = v9fs_iop_set_acl,
|
|
};
|
|
|
|
const struct inode_operations v9fs_symlink_inode_operations_dotl = {
|
|
.get_link = v9fs_vfs_get_link_dotl,
|
|
.getattr = v9fs_vfs_getattr_dotl,
|
|
.setattr = v9fs_vfs_setattr_dotl,
|
|
.listxattr = v9fs_listxattr,
|
|
};
|