* 'nfs-for-2.6.37' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6: (67 commits)
SUNRPC: Cleanup duplicate assignment in rpcauth_refreshcred
nfs: fix unchecked value
Ask for time_delta during fsinfo probe
Revalidate caches on lock
SUNRPC: After calling xprt_release(), we must restart from call_reserve
NFSv4: Fix up the 'dircount' hint in encode_readdir
NFSv4: Clean up nfs4_decode_dirent
NFSv4: nfs4_decode_dirent must clear entry->fattr->valid
NFSv4: Fix a regression in decode_getfattr
NFSv4: Fix up decode_attr_filehandle() to handle the case of empty fh pointer
NFS: Ensure we check all allocation return values in new readdir code
NFS: Readdir plus in v4
NFS: introduce generic decode_getattr function
NFS: check xdr_decode for errors
NFS: nfs_readdir_filler catch all errors
NFS: readdir with vmapped pages
NFS: remove page size checking code
NFS: decode_dirent should use an xdr_stream
SUNRPC: Add a helper function xdr_inline_peek
NFS: remove readdir plus limit
...
- short guide on setting up a diskless box with NFS root filesystem.
rpc-cache.txt
- introduction to the caching mechanisms in the sunrpc layer.
+idmapper.txt
+ - information for configuring request-keys to be used by idmapper
--- /dev/null
+
+=========
+ID Mapper
+=========
+Id mapper is used by NFS to translate user and group ids into names, and to
+translate user and group names into ids. Part of this translation involves
+performing an upcall to userspace to request the information. Id mapper will
+user request-key to perform this upcall and cache the result. The program
+/usr/sbin/nfs.upcall should be called by request-key, and will perform the
+translation and initialize a key with the resulting information.
+
+ NFS_USE_NEW_IDMAPPER must be selected when configuring the kernel to use this
+ feature.
+
+===========
+Configuring
+===========
+The file /etc/request-key.conf will need to be modified so /sbin/request-key can
+direct the upcall. The following line should be added:
+
+#OP TYPE DESCRIPTION CALLOUT INFO PROGRAM ARG1 ARG2 ARG3 ...
+#====== ======= =============== =============== ===============================
+create id_resolver * * /usr/sbin/nfs.upcall %k %d 600
+
+This will direct all id_resolver requests to the program /usr/sbin/nfs.upcall.
+The last parameter, 600, defines how many seconds into the future the key will
+expire. This parameter is optional for /usr/sbin/nfs.upcall. When the timeout
+is not specified, nfs.upcall will default to 600 seconds.
+
+id mapper uses for key descriptions:
+ uid: Find the UID for the given user
+ gid: Find the GID for the given group
+ user: Find the user name for the given UID
+ group: Find the group name for the given GID
+
+You can handle any of these individually, rather than using the generic upcall
+program. If you would like to use your own program for a uid lookup then you
+would edit your request-key.conf so it look similar to this:
+
+#OP TYPE DESCRIPTION CALLOUT INFO PROGRAM ARG1 ARG2 ARG3 ...
+#====== ======= =============== =============== ===============================
+create id_resolver uid:* * /some/other/program %k %d 600
+create id_resolver * * /usr/sbin/nfs.upcall %k %d 600
+
+Notice that the new line was added above the line for the generic program.
+request-key will find the first matching line and corresponding program. In
+this case, /some/other/program will handle all uid lookups and
+/usr/sbin/nfs.upcall will handle gid, user, and group lookups.
+
+See <file:Documentation/keys-request-keys.txt> for more information about the
+request-key function.
+
+
+==========
+nfs.upcall
+==========
+nfs.upcall is designed to be called by request-key, and should not be run "by
+hand". This program takes two arguments, a serialized key and a key
+description. The serialized key is first converted into a key_serial_t, and
+then passed as an argument to keyctl_instantiate (both are part of keyutils.h).
+
+The actual lookups are performed by functions found in nfsidmap.h. nfs.upcall
+determines the correct function to call by looking at the first part of the
+description string. For example, a uid lookup description will appear as
+"uid:user@domain".
+
+nfs.upcall will return 0 if the key was instantiated, and non-zero otherwise.
Default: any
+nfsrootdebug
+
+ This parameter enables debugging messages to appear in the kernel
+ log at boot time so that administrators can verify that the correct
+ NFS mount options, server address, and root path are passed to the
+ NFS client.
+
+
+rdinit=<executable file>
+
+ To specify which file contains the program that starts system
+ initialization, administrators can use this command line parameter.
+ The default value of this parameter is "/init". If the specified
+ file exists and the kernel can execute it, root filesystem related
+ kernel command line parameters, including `nfsroot=', are ignored.
+
+ A description of the process of mounting the root file system can be
+ found in:
+
+ Documentation/early-userspace/README
+
+
3.) Boot Loader
1 to enable accounting
Default value is 0.
- nfsaddrs= [NFS]
+ nfsaddrs= [NFS] Deprecated. Use ip= instead.
See Documentation/filesystems/nfs/nfsroot.txt.
nfsroot= [NFS] nfs root filesystem for disk-less boxes.
See Documentation/filesystems/nfs/nfsroot.txt.
+ nfsrootdebug [NFS] enable nfsroot debugging messages.
+ See Documentation/filesystems/nfs/nfsroot.txt.
+
nfs.callback_tcpport=
[NFS] set the TCP port on which the NFSv4 callback
channel should listen.
};
static LIST_HEAD(nlm_blocked);
+static DEFINE_SPINLOCK(nlm_blocked_lock);
/**
* nlmclnt_init - Set up per-NFS mount point lockd data structures
block->b_lock = fl;
init_waitqueue_head(&block->b_wait);
block->b_status = nlm_lck_blocked;
+
+ spin_lock(&nlm_blocked_lock);
list_add(&block->b_list, &nlm_blocked);
+ spin_unlock(&nlm_blocked_lock);
}
return block;
}
{
if (block == NULL)
return;
+ spin_lock(&nlm_blocked_lock);
list_del(&block->b_list);
+ spin_unlock(&nlm_blocked_lock);
kfree(block);
}
* Look up blocked request based on arguments.
* Warning: must not use cookie to match it!
*/
+ spin_lock(&nlm_blocked_lock);
list_for_each_entry(block, &nlm_blocked, b_list) {
struct file_lock *fl_blocked = block->b_lock;
wake_up(&block->b_wait);
res = nlm_granted;
}
+ spin_unlock(&nlm_blocked_lock);
return res;
}
allow_signal(SIGKILL);
down_write(&host->h_rwsem);
-
- /* This one ensures that our parent doesn't terminate while the
- * reclaim is in progress */
- lock_kernel();
lockd_up(); /* note: this cannot fail as lockd is already running */
dprintk("lockd: reclaiming locks for host %s\n", host->h_name);
dprintk("NLM: done reclaiming locks for host %s\n", host->h_name);
/* Now, wake up all processes that sleep on a blocked lock */
+ spin_lock(&nlm_blocked_lock);
list_for_each_entry(block, &nlm_blocked, b_list) {
if (block->b_host == host) {
block->b_status = nlm_lck_denied_grace_period;
wake_up(&block->b_wait);
}
}
+ spin_unlock(&nlm_blocked_lock);
/* Release host handle after use */
nlm_release_host(host);
lockd_down();
- unlock_kernel();
return 0;
}
/* Set up the argument struct */
nlmclnt_setlockargs(call, fl);
- lock_kernel();
if (IS_SETLK(cmd) || IS_SETLKW(cmd)) {
if (fl->fl_type != F_UNLCK) {
call->a_args.block = IS_SETLKW(cmd) ? 1 : 0;
status = nlmclnt_test(call, fl);
else
status = -EINVAL;
-
fl->fl_ops->fl_release_private(fl);
fl->fl_ops = NULL;
- unlock_kernel();
dprintk("lockd: clnt proc returns %d\n", status);
return status;
static void nlmclnt_rpc_release(void *data)
{
- lock_kernel();
nlm_release_call(data);
- unlock_kernel();
}
static int nlm_wait_on_grace(wait_queue_head_t *queue)
static void nlmclnt_locks_copy_lock(struct file_lock *new, struct file_lock *fl)
{
+ spin_lock(&fl->fl_u.nfs_fl.owner->host->h_lock);
new->fl_u.nfs_fl.state = fl->fl_u.nfs_fl.state;
new->fl_u.nfs_fl.owner = nlm_get_lockowner(fl->fl_u.nfs_fl.owner);
list_add_tail(&new->fl_u.nfs_fl.list, &fl->fl_u.nfs_fl.owner->host->h_granted);
+ spin_unlock(&fl->fl_u.nfs_fl.owner->host->h_lock);
}
static void nlmclnt_locks_release_private(struct file_lock *fl)
{
+ spin_lock(&fl->fl_u.nfs_fl.owner->host->h_lock);
list_del(&fl->fl_u.nfs_fl.list);
+ spin_unlock(&fl->fl_u.nfs_fl.owner->host->h_lock);
nlm_put_lockowner(fl->fl_u.nfs_fl.owner);
}
die:
return;
retry_rebind:
- lock_kernel();
nlm_rebind_host(req->a_host);
- unlock_kernel();
retry_unlock:
rpc_restart_call(task);
}
/* Don't ever retry more than 3 times */
if (req->a_retries++ >= NLMCLNT_MAX_RETRIES)
goto die;
- lock_kernel();
nlm_rebind_host(req->a_host);
- unlock_kernel();
rpc_restart_call(task);
rpc_delay(task, 30 * HZ);
}
select DNS_RESOLVER
select KEYS
default y
+
+config NFS_USE_NEW_IDMAPPER
+ bool "Use the new idmapper upcall routine"
+ depends on NFS_V4 && KEYS
+ help
+ Say Y here if you want NFS to use the new idmapper upcall functions.
+ You will need /sbin/request-key (usually provided by the keyutils
+ package). For details, read
+ <file:Documentation/filesystems/nfs/idmapper.txt>.
+
+ If you are unsure, say N.
*/
static void nfs_destroy_server(struct nfs_server *server)
{
- if (!(server->flags & NFS_MOUNT_NONLM))
+ if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) ||
+ !(server->flags & NFS_MOUNT_LOCAL_FCNTL))
nlmclnt_done(server->nlm_host);
}
if (nlm_init.nfs_version > 3)
return 0;
- if (server->flags & NFS_MOUNT_NONLM)
+ if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) &&
+ (server->flags & NFS_MOUNT_LOCAL_FCNTL))
return 0;
switch (clp->cl_proto) {
server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
- if (server->dtsize > PAGE_CACHE_SIZE)
- server->dtsize = PAGE_CACHE_SIZE;
+ if (server->dtsize > PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES)
+ server->dtsize = PAGE_CACHE_SIZE * NFS_MAX_READDIR_PAGES;
if (server->dtsize > server->rsize)
server->dtsize = server->rsize;
server->maxfilesize = fsinfo->maxfilesize;
+ server->time_delta = fsinfo->time_delta;
+
/* We're airborne Set socket buffersize */
rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
}
/* Initialise the client representation from the mount data */
server->flags = data->flags;
- server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|
- NFS_CAP_POSIX_LOCK;
+ server->caps |= NFS_CAP_ATOMIC_OPEN|NFS_CAP_CHANGE_ATTR|NFS_CAP_POSIX_LOCK;
+ if (!(data->flags & NFS_MOUNT_NORDIRPLUS))
+ server->caps |= NFS_CAP_READDIRPLUS;
server->options = data->options;
/* Get a client record */
#include <linux/namei.h>
#include <linux/mount.h>
#include <linux/sched.h>
+#include <linux/vmalloc.h>
-#include "nfs4_fs.h"
#include "delegation.h"
#include "iostat.h"
#include "internal.h"
+#include "fscache.h"
/* #define NFS_DEBUG_VERBOSE 1 */
struct inode *, struct dentry *);
static int nfs_fsync_dir(struct file *, int);
static loff_t nfs_llseek_dir(struct file *, loff_t, int);
+static int nfs_readdir_clear_array(struct page*, gfp_t);
const struct file_operations nfs_dir_operations = {
.llseek = nfs_llseek_dir,
.setattr = nfs_setattr,
};
+const struct address_space_operations nfs_dir_addr_space_ops = {
+ .releasepage = nfs_readdir_clear_array,
+};
+
#ifdef CONFIG_NFS_V3
const struct inode_operations nfs3_dir_inode_operations = {
.create = nfs_create,
#ifdef CONFIG_NFS_V4
static struct dentry *nfs_atomic_lookup(struct inode *, struct dentry *, struct nameidata *);
+static int nfs_open_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *nd);
const struct inode_operations nfs4_dir_inode_operations = {
- .create = nfs_create,
+ .create = nfs_open_create,
.lookup = nfs_atomic_lookup,
.link = nfs_link,
.unlink = nfs_unlink,
return res;
}
-typedef __be32 * (*decode_dirent_t)(__be32 *, struct nfs_entry *, int);
+struct nfs_cache_array_entry {
+ u64 cookie;
+ u64 ino;
+ struct qstr string;
+};
+
+struct nfs_cache_array {
+ unsigned int size;
+ int eof_index;
+ u64 last_cookie;
+ struct nfs_cache_array_entry array[0];
+};
+
+#define MAX_READDIR_ARRAY ((PAGE_SIZE - sizeof(struct nfs_cache_array)) / sizeof(struct nfs_cache_array_entry))
+
+typedef __be32 * (*decode_dirent_t)(struct xdr_stream *, struct nfs_entry *, struct nfs_server *, int);
typedef struct {
struct file *file;
struct page *page;
unsigned long page_index;
- __be32 *ptr;
u64 *dir_cookie;
loff_t current_index;
- struct nfs_entry *entry;
decode_dirent_t decode;
- int plus;
+
unsigned long timestamp;
unsigned long gencount;
- int timestamp_valid;
+ unsigned int cache_entry_index;
+ unsigned int plus:1;
+ unsigned int eof:1;
} nfs_readdir_descriptor_t;
-/* Now we cache directories properly, by stuffing the dirent
- * data directly in the page cache.
- *
- * Inode invalidation due to refresh etc. takes care of
- * _everything_, no sloppy entry flushing logic, no extraneous
- * copying, network direct to page cache, the way it was meant
- * to be.
- *
- * NOTE: Dirent information verification is done always by the
- * page-in of the RPC reply, nowhere else, this simplies
- * things substantially.
+/*
+ * The caller is responsible for calling nfs_readdir_release_array(page)
*/
static
-int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page *page)
+struct nfs_cache_array *nfs_readdir_get_array(struct page *page)
+{
+ if (page == NULL)
+ return ERR_PTR(-EIO);
+ return (struct nfs_cache_array *)kmap(page);
+}
+
+static
+void nfs_readdir_release_array(struct page *page)
+{
+ kunmap(page);
+}
+
+/*
+ * we are freeing strings created by nfs_add_to_readdir_array()
+ */
+static
+int nfs_readdir_clear_array(struct page *page, gfp_t mask)
+{
+ struct nfs_cache_array *array = nfs_readdir_get_array(page);
+ int i;
+ for (i = 0; i < array->size; i++)
+ kfree(array->array[i].string.name);
+ nfs_readdir_release_array(page);
+ return 0;
+}
+
+/*
+ * the caller is responsible for freeing qstr.name
+ * when called by nfs_readdir_add_to_array, the strings will be freed in
+ * nfs_clear_readdir_array()
+ */
+static
+int nfs_readdir_make_qstr(struct qstr *string, const char *name, unsigned int len)
+{
+ string->len = len;
+ string->name = kmemdup(name, len, GFP_KERNEL);
+ if (string->name == NULL)
+ return -ENOMEM;
+ string->hash = full_name_hash(name, len);
+ return 0;
+}
+
+static
+int nfs_readdir_add_to_array(struct nfs_entry *entry, struct page *page)
+{
+ struct nfs_cache_array *array = nfs_readdir_get_array(page);
+ struct nfs_cache_array_entry *cache_entry;
+ int ret;
+
+ if (IS_ERR(array))
+ return PTR_ERR(array);
+ ret = -EIO;
+ if (array->size >= MAX_READDIR_ARRAY)
+ goto out;
+
+ cache_entry = &array->array[array->size];
+ cache_entry->cookie = entry->prev_cookie;
+ cache_entry->ino = entry->ino;
+ ret = nfs_readdir_make_qstr(&cache_entry->string, entry->name, entry->len);
+ if (ret)
+ goto out;
+ array->last_cookie = entry->cookie;
+ if (entry->eof == 1)
+ array->eof_index = array->size;
+ array->size++;
+out:
+ nfs_readdir_release_array(page);
+ return ret;
+}
+
+static
+int nfs_readdir_search_for_pos(struct nfs_cache_array *array, nfs_readdir_descriptor_t *desc)
+{
+ loff_t diff = desc->file->f_pos - desc->current_index;
+ unsigned int index;
+
+ if (diff < 0)
+ goto out_eof;
+ if (diff >= array->size) {
+ if (array->eof_index > 0)
+ goto out_eof;
+ desc->current_index += array->size;
+ return -EAGAIN;
+ }
+
+ index = (unsigned int)diff;
+ *desc->dir_cookie = array->array[index].cookie;
+ desc->cache_entry_index = index;
+ if (index == array->eof_index)
+ desc->eof = 1;
+ return 0;
+out_eof:
+ desc->eof = 1;
+ return -EBADCOOKIE;
+}
+
+static
+int nfs_readdir_search_for_cookie(struct nfs_cache_array *array, nfs_readdir_descriptor_t *desc)
+{
+ int i;
+ int status = -EAGAIN;
+
+ for (i = 0; i < array->size; i++) {
+ if (i == array->eof_index) {
+ desc->eof = 1;
+ status = -EBADCOOKIE;
+ }
+ if (array->array[i].cookie == *desc->dir_cookie) {
+ desc->cache_entry_index = i;
+ status = 0;
+ break;
+ }
+ }
+
+ return status;
+}
+
+static
+int nfs_readdir_search_array(nfs_readdir_descriptor_t *desc)
+{
+ struct nfs_cache_array *array;
+ int status = -EBADCOOKIE;
+
+ if (desc->dir_cookie == NULL)
+ goto out;
+
+ array = nfs_readdir_get_array(desc->page);
+ if (IS_ERR(array)) {
+ status = PTR_ERR(array);
+ goto out;
+ }
+
+ if (*desc->dir_cookie == 0)
+ status = nfs_readdir_search_for_pos(array, desc);
+ else
+ status = nfs_readdir_search_for_cookie(array, desc);
+
+ nfs_readdir_release_array(desc->page);
+out:
+ return status;
+}
+
+/* Fill a page with xdr information before transferring to the cache page */
+static
+int nfs_readdir_xdr_filler(struct page **pages, nfs_readdir_descriptor_t *desc,
+ struct nfs_entry *entry, struct file *file, struct inode *inode)
{
- struct file *file = desc->file;
- struct inode *inode = file->f_path.dentry->d_inode;
struct rpc_cred *cred = nfs_file_cred(file);
unsigned long timestamp, gencount;
int error;
- dfprintk(DIRCACHE, "NFS: %s: reading cookie %Lu into page %lu\n",
- __func__, (long long)desc->entry->cookie,
- page->index);
-
again:
timestamp = jiffies;
gencount = nfs_inc_attr_generation_counter();
- error = NFS_PROTO(inode)->readdir(file->f_path.dentry, cred, desc->entry->cookie, page,
+ error = NFS_PROTO(inode)->readdir(file->f_path.dentry, cred, entry->cookie, pages,
NFS_SERVER(inode)->dtsize, desc->plus);
if (error < 0) {
/* We requested READDIRPLUS, but the server doesn't grok it */
}
desc->timestamp = timestamp;
desc->gencount = gencount;
- desc->timestamp_valid = 1;
- SetPageUptodate(page);
- /* Ensure consistent page alignment of the data.
- * Note: assumes we have exclusive access to this mapping either
- * through inode->i_mutex or some other mechanism.
- */
- if (invalidate_inode_pages2_range(inode->i_mapping, page->index + 1, -1) < 0) {
- /* Should never happen */
- nfs_zap_mapping(inode, inode->i_mapping);
- }
- unlock_page(page);
- return 0;
- error:
- unlock_page(page);
- return -EIO;
+error:
+ return error;
}
-static inline
-int dir_decode(nfs_readdir_descriptor_t *desc)
+/* Fill in an entry based on the xdr code stored in desc->page */
+static
+int xdr_decode(nfs_readdir_descriptor_t *desc, struct nfs_entry *entry, struct xdr_stream *stream)
{
- __be32 *p = desc->ptr;
- p = desc->decode(p, desc->entry, desc->plus);
+ __be32 *p = desc->decode(stream, entry, NFS_SERVER(desc->file->f_path.dentry->d_inode), desc->plus);
if (IS_ERR(p))
return PTR_ERR(p);
- desc->ptr = p;
- if (desc->timestamp_valid) {
- desc->entry->fattr->time_start = desc->timestamp;
- desc->entry->fattr->gencount = desc->gencount;
- } else
- desc->entry->fattr->valid &= ~NFS_ATTR_FATTR;
+
+ entry->fattr->time_start = desc->timestamp;
+ entry->fattr->gencount = desc->gencount;
return 0;
}
-static inline
-void dir_page_release(nfs_readdir_descriptor_t *desc)
+static
+int nfs_same_file(struct dentry *dentry, struct nfs_entry *entry)
{
- kunmap(desc->page);
- page_cache_release(desc->page);
- desc->page = NULL;
- desc->ptr = NULL;
+ struct nfs_inode *node;
+ if (dentry->d_inode == NULL)
+ goto different;
+ node = NFS_I(dentry->d_inode);
+ if (node->fh.size != entry->fh->size)
+ goto different;
+ if (strncmp(node->fh.data, entry->fh->data, node->fh.size) != 0)
+ goto different;
+ return 1;
+different:
+ return 0;
}
-/*
- * Given a pointer to a buffer that has already been filled by a call
- * to readdir, find the next entry with cookie '*desc->dir_cookie'.
- *
- * If the end of the buffer has been reached, return -EAGAIN, if not,
- * return the offset within the buffer of the next entry to be
- * read.
- */
-static inline
-int find_dirent(nfs_readdir_descriptor_t *desc)
+static
+void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry)
{
- struct nfs_entry *entry = desc->entry;
- int loop_count = 0,
- status;
+ struct qstr filename = {
+ .len = entry->len,
+ .name = entry->name,
+ };
+ struct dentry *dentry;
+ struct dentry *alias;
+ struct inode *dir = parent->d_inode;
+ struct inode *inode;
- while((status = dir_decode(desc)) == 0) {
- dfprintk(DIRCACHE, "NFS: %s: examining cookie %Lu\n",
- __func__, (unsigned long long)entry->cookie);
- if (entry->prev_cookie == *desc->dir_cookie)
- break;
- if (loop_count++ > 200) {
- loop_count = 0;
- schedule();
+ if (filename.name[0] == '.') {
+ if (filename.len == 1)
+ return;
+ if (filename.len == 2 && filename.name[1] == '.')
+ return;
+ }
+ filename.hash = full_name_hash(filename.name, filename.len);
+
+ dentry = d_lookup(parent, &filename);
+ if (dentry != NULL) {
+ if (nfs_same_file(dentry, entry)) {
+ nfs_refresh_inode(dentry->d_inode, entry->fattr);
+ goto out;
+ } else {
+ d_drop(dentry);
+ dput(dentry);
}
}
- return status;
+
+ dentry = d_alloc(parent, &filename);
+ if (dentry == NULL)
+ return;
+
+ dentry->d_op = NFS_PROTO(dir)->dentry_ops;
+ inode = nfs_fhget(dentry->d_sb, entry->fh, entry->fattr);
+ if (IS_ERR(inode))
+ goto out;
+
+ alias = d_materialise_unique(dentry, inode);
+ if (IS_ERR(alias))
+ goto out;
+ else if (alias) {
+ nfs_set_verifier(alias, nfs_save_change_attribute(dir));
+ dput(alias);
+ } else
+ nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
+
+out:
+ dput(dentry);
+}
+
+/* Perform conversion from xdr to cache array */
+static
+void nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *entry,
+ void *xdr_page, struct page *page, unsigned int buflen)
+{
+ struct xdr_stream stream;
+ struct xdr_buf buf;
+ __be32 *ptr = xdr_page;
+ int status;
+ struct nfs_cache_array *array;
+
+ buf.head->iov_base = xdr_page;
+ buf.head->iov_len = buflen;
+ buf.tail->iov_len = 0;
+ buf.page_base = 0;
+ buf.page_len = 0;
+ buf.buflen = buf.head->iov_len;
+ buf.len = buf.head->iov_len;
+
+ xdr_init_decode(&stream, &buf, ptr);
+
+
+ do {
+ status = xdr_decode(desc, entry, &stream);
+ if (status != 0)
+ break;
+
+ if (nfs_readdir_add_to_array(entry, page) == -1)
+ break;
+ if (desc->plus == 1)
+ nfs_prime_dcache(desc->file->f_path.dentry, entry);
+ } while (!entry->eof);
+
+ if (status == -EBADCOOKIE && entry->eof) {
+ array = nfs_readdir_get_array(page);
+ array->eof_index = array->size - 1;
+ status = 0;
+ nfs_readdir_release_array(page);
+ }
+}
+
+static
+void nfs_readdir_free_pagearray(struct page **pages, unsigned int npages)
+{
+ unsigned int i;
+ for (i = 0; i < npages; i++)
+ put_page(pages[i]);
+}
+
+static
+void nfs_readdir_free_large_page(void *ptr, struct page **pages,
+ unsigned int npages)
+{
+ vm_unmap_ram(ptr, npages);
+ nfs_readdir_free_pagearray(pages, npages);
}
/*
- * Given a pointer to a buffer that has already been filled by a call
- * to readdir, find the entry at offset 'desc->file->f_pos'.
- *
- * If the end of the buffer has been reached, return -EAGAIN, if not,
- * return the offset within the buffer of the next entry to be
- * read.
+ * nfs_readdir_large_page will allocate pages that must be freed with a call
+ * to nfs_readdir_free_large_page
*/
-static inline
-int find_dirent_index(nfs_readdir_descriptor_t *desc)
+static
+void *nfs_readdir_large_page(struct page **pages, unsigned int npages)
{
- struct nfs_entry *entry = desc->entry;
- int loop_count = 0,
- status;
+ void *ptr;
+ unsigned int i;
+
+ for (i = 0; i < npages; i++) {
+ struct page *page = alloc_page(GFP_KERNEL);
+ if (page == NULL)
+ goto out_freepages;
+ pages[i] = page;
+ }
- for(;;) {
- status = dir_decode(desc);
- if (status)
- break;
+ ptr = vm_map_ram(pages, npages, 0, PAGE_KERNEL);
+ if (!IS_ERR_OR_NULL(ptr))
+ return ptr;
+out_freepages:
+ nfs_readdir_free_pagearray(pages, i);
+ return NULL;
+}
+
+static
+int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page, struct inode *inode)
+{
+ struct page *pages[NFS_MAX_READDIR_PAGES];
+ void *pages_ptr = NULL;
+ struct nfs_entry entry;
+ struct file *file = desc->file;
+ struct nfs_cache_array *array;
+ int status = 0;
+ unsigned int array_size = ARRAY_SIZE(pages);
+
+ entry.prev_cookie = 0;
+ entry.cookie = *desc->dir_cookie;
+ entry.eof = 0;
+ entry.fh = nfs_alloc_fhandle();
+ entry.fattr = nfs_alloc_fattr();
+ if (entry.fh == NULL || entry.fattr == NULL)
+ goto out;
- dfprintk(DIRCACHE, "NFS: found cookie %Lu at index %Ld\n",
- (unsigned long long)entry->cookie, desc->current_index);
+ array = nfs_readdir_get_array(page);
+ memset(array, 0, sizeof(struct nfs_cache_array));
+ array->eof_index = -1;
- if (desc->file->f_pos == desc->current_index) {
- *desc->dir_cookie = entry->cookie;
+ pages_ptr = nfs_readdir_large_page(pages, array_size);
+ if (!pages_ptr)
+ goto out_release_array;
+ do {
+ status = nfs_readdir_xdr_filler(pages, desc, &entry, file, inode);
+
+ if (status < 0)
break;
- }
- desc->current_index++;
- if (loop_count++ > 200) {
- loop_count = 0;
- schedule();
- }
- }
+ nfs_readdir_page_filler(desc, &entry, pages_ptr, page, array_size * PAGE_SIZE);
+ } while (array->eof_index < 0 && array->size < MAX_READDIR_ARRAY);
+
+ nfs_readdir_free_large_page(pages_ptr, pages, array_size);
+out_release_array:
+ nfs_readdir_release_array(page);
+out:
+ nfs_free_fattr(entry.fattr);
+ nfs_free_fhandle(entry.fh);
return status;
}
/*
- * Find the given page, and call find_dirent() or find_dirent_index in
- * order to try to return the next entry.
+ * Now we cache directories properly, by converting xdr information
+ * to an array that can be used for lookups later. This results in
+ * fewer cache pages, since we can store more information on each page.
+ * We only need to convert from xdr once so future lookups are much simpler
*/
-static inline
-int find_dirent_page(nfs_readdir_descriptor_t *desc)
+static
+int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page* page)
{
struct inode *inode = desc->file->f_path.dentry->d_inode;
- struct page *page;
- int status;
- dfprintk(DIRCACHE, "NFS: %s: searching page %ld for target %Lu\n",
- __func__, desc->page_index,
- (long long) *desc->dir_cookie);
+ if (nfs_readdir_xdr_to_array(desc, page, inode) < 0)
+ goto error;
+ SetPageUptodate(page);
- /* If we find the page in the page_cache, we cannot be sure
- * how fresh the data is, so we will ignore readdir_plus attributes.
- */
- desc->timestamp_valid = 0;
- page = read_cache_page(inode->i_mapping, desc->page_index,
- (filler_t *)nfs_readdir_filler, desc);
- if (IS_ERR(page)) {
- status = PTR_ERR(page);
- goto out;
+ if (invalidate_inode_pages2_range(inode->i_mapping, page->index + 1, -1) < 0) {
+ /* Should never happen */
+ nfs_zap_mapping(inode, inode->i_mapping);
}
+ unlock_page(page);
+ return 0;
+ error:
+ unlock_page(page);
+ return -EIO;
+}
- /* NOTE: Someone else may have changed the READDIRPLUS flag */
- desc->page = page;
- desc->ptr = kmap(page); /* matching kunmap in nfs_do_filldir */
- if (*desc->dir_cookie != 0)
- status = find_dirent(desc);
- else
- status = find_dirent_index(desc);
- if (status < 0)
- dir_page_release(desc);
- out:
- dfprintk(DIRCACHE, "NFS: %s: returns %d\n", __func__, status);
- return status;
+static
+void cache_page_release(nfs_readdir_descriptor_t *desc)
+{
+ page_cache_release(desc->page);
+ desc->page = NULL;
+}
+
+static
+struct page *get_cache_page(nfs_readdir_descriptor_t *desc)
+{
+ struct page *page;
+ page = read_cache_page(desc->file->f_path.dentry->d_inode->i_mapping,
+ desc->page_index, (filler_t *)nfs_readdir_filler, desc);
+ if (IS_ERR(page))
+ desc->eof = 1;
+ return page;
}
/*
- * Recurse through the page cache pages, and return a
- * filled nfs_entry structure of the next directory entry if possible.
- *
- * The target for the search is '*desc->dir_cookie' if non-0,
- * 'desc->file->f_pos' otherwise
+ * Returns 0 if desc->dir_cookie was found on page desc->page_index
*/
+static
+int find_cache_page(nfs_readdir_descriptor_t *desc)
+{
+ int res;
+
+ desc->page = get_cache_page(desc);
+ if (IS_ERR(desc->page))
+ return PTR_ERR(desc->page);
+
+ res = nfs_readdir_search_array(desc);
+ if (res == 0)
+ return 0;
+ cache_page_release(desc);
+ return res;
+}
+
+/* Search for desc->dir_cookie from the beginning of the page cache */
static inline
int readdir_search_pagecache(nfs_readdir_descriptor_t *desc)
{
- int loop_count = 0;
- int res;
-
- /* Always search-by-index from the beginning of the cache */
- if (*desc->dir_cookie == 0) {
- dfprintk(DIRCACHE, "NFS: readdir_search_pagecache() searching for offset %Ld\n",
- (long long)desc->file->f_pos);
- desc->page_index = 0;
- desc->entry->cookie = desc->entry->prev_cookie = 0;
- desc->entry->eof = 0;
- desc->current_index = 0;
- } else
- dfprintk(DIRCACHE, "NFS: readdir_search_pagecache() searching for cookie %Lu\n",
- (unsigned long long)*desc->dir_cookie);
+ int res = -EAGAIN;
- for (;;) {
- res = find_dirent_page(desc);
+ while (1) {
+ res = find_cache_page(desc);
if (res != -EAGAIN)
break;
- /* Align to beginning of next page */
- desc->page_index ++;
- if (loop_count++ > 200) {
- loop_count = 0;
- schedule();
- }
+ desc->page_index++;
}
-
- dfprintk(DIRCACHE, "NFS: %s: returns %d\n", __func__, res);
return res;
}
return (inode->i_mode >> 12) & 15;
}
-static struct dentry *nfs_readdir_lookup(nfs_readdir_descriptor_t *desc);
-
/*
* Once we've found the start of the dirent within a page: fill 'er up...
*/
filldir_t filldir)
{
struct file *file = desc->file;
- struct nfs_entry *entry = desc->entry;
- struct dentry *dentry = NULL;
- u64 fileid;
- int loop_count = 0,
- res;
-
- dfprintk(DIRCACHE, "NFS: nfs_do_filldir() filling starting @ cookie %Lu\n",
- (unsigned long long)entry->cookie);
-
- for(;;) {
- unsigned d_type = DT_UNKNOWN;
- /* Note: entry->prev_cookie contains the cookie for
- * retrieving the current dirent on the server */
- fileid = entry->ino;
-
- /* Get a dentry if we have one */
- if (dentry != NULL)
- dput(dentry);
- dentry = nfs_readdir_lookup(desc);
+ int i = 0;
+ int res = 0;
+ struct nfs_cache_array *array = NULL;
+ unsigned int d_type = DT_UNKNOWN;
+ struct dentry *dentry = NULL;
- /* Use readdirplus info */
- if (dentry != NULL && dentry->d_inode != NULL) {
- d_type = dt_type(dentry->d_inode);
- fileid = NFS_FILEID(dentry->d_inode);
- }
+ array = nfs_readdir_get_array(desc->page);
- res = filldir(dirent, entry->name, entry->len,
- file->f_pos, nfs_compat_user_ino64(fileid),
- d_type);
+ for (i = desc->cache_entry_index; i < array->size; i++) {
+ d_type = DT_UNKNOWN;
+
+ res = filldir(dirent, array->array[i].string.name,
+ array->array[i].string.len, file->f_pos,
+ nfs_compat_user_ino64(array->array[i].ino), d_type);
if (res < 0)
break;
file->f_pos++;
- *desc->dir_cookie = entry->cookie;
- if (dir_decode(desc) != 0) {
- desc->page_index ++;
+ desc->cache_entry_index = i;
+ if (i < (array->size-1))
+ *desc->dir_cookie = array->array[i+1].cookie;
+ else
+ *desc->dir_cookie = array->last_cookie;
+ if (i == array->eof_index) {
+ desc->eof = 1;
break;
}
- if (loop_count++ > 200) {
- loop_count = 0;
- schedule();
- }
}
- dir_page_release(desc);
+
+ nfs_readdir_release_array(desc->page);
+ cache_page_release(desc);
if (dentry != NULL)
dput(dentry);
dfprintk(DIRCACHE, "NFS: nfs_do_filldir() filling ended @ cookie %Lu; returning = %d\n",
int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent,
filldir_t filldir)
{
- struct file *file = desc->file;
- struct inode *inode = file->f_path.dentry->d_inode;
- struct rpc_cred *cred = nfs_file_cred(file);
struct page *page = NULL;
int status;
- unsigned long timestamp, gencount;
+ struct inode *inode = desc->file->f_path.dentry->d_inode;
dfprintk(DIRCACHE, "NFS: uncached_readdir() searching for cookie %Lu\n",
(unsigned long long)*desc->dir_cookie);
status = -ENOMEM;
goto out;
}
- timestamp = jiffies;
- gencount = nfs_inc_attr_generation_counter();
- status = NFS_PROTO(inode)->readdir(file->f_path.dentry, cred,
- *desc->dir_cookie, page,
- NFS_SERVER(inode)->dtsize,
- desc->plus);
- desc->page = page;
- desc->ptr = kmap(page); /* matching kunmap in nfs_do_filldir */
- if (status >= 0) {
- desc->timestamp = timestamp;
- desc->gencount = gencount;
- desc->timestamp_valid = 1;
- if ((status = dir_decode(desc)) == 0)
- desc->entry->prev_cookie = *desc->dir_cookie;
- } else
+
+ if (nfs_readdir_xdr_to_array(desc, page, inode) == -1) {
status = -EIO;
- if (status < 0)
goto out_release;
+ }
+ desc->page_index = 0;
+ desc->page = page;
status = nfs_do_filldir(desc, dirent, filldir);
- /* Reset read descriptor so it searches the page cache from
- * the start upon the next call to readdir_search_pagecache() */
- desc->page_index = 0;
- desc->entry->cookie = desc->entry->prev_cookie = 0;
- desc->entry->eof = 0;
out:
dfprintk(DIRCACHE, "NFS: %s: returns %d\n",
__func__, status);
return status;
out_release:
- dir_page_release(desc);
+ cache_page_release(desc);
goto out;
}
struct inode *inode = dentry->d_inode;
nfs_readdir_descriptor_t my_desc,
*desc = &my_desc;
- struct nfs_entry my_entry;
int res = -ENOMEM;
dfprintk(FILE, "NFS: readdir(%s/%s) starting at cookie %llu\n",
desc->decode = NFS_PROTO(inode)->decode_dirent;
desc->plus = NFS_USE_READDIRPLUS(inode);
- my_entry.cookie = my_entry.prev_cookie = 0;
- my_entry.eof = 0;
- my_entry.fh = nfs_alloc_fhandle();
- my_entry.fattr = nfs_alloc_fattr();
- if (my_entry.fh == NULL || my_entry.fattr == NULL)
- goto out_alloc_failed;
-
- desc->entry = &my_entry;
-
nfs_block_sillyrename(dentry);
res = nfs_revalidate_mapping(inode, filp->f_mapping);
if (res < 0)
goto out;
- while(!desc->entry->eof) {
+ while (desc->eof != 1) {
res = readdir_search_pagecache(desc);
if (res == -EBADCOOKIE) {
/* This means either end of directory */
- if (*desc->dir_cookie && desc->entry->cookie != *desc->dir_cookie) {
+ if (*desc->dir_cookie && desc->eof == 0) {
/* Or that the server has 'lost' a cookie */
res = uncached_readdir(desc, dirent, filldir);
if (res >= 0)
if (res == -ETOOSMALL && desc->plus) {
clear_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
nfs_zap_caches(inode);
+ desc->page_index = 0;
desc->plus = 0;
- desc->entry->eof = 0;
+ desc->eof = 0;
continue;
}
if (res < 0)
nfs_unblock_sillyrename(dentry);
if (res > 0)
res = 0;
-out_alloc_failed:
- nfs_free_fattr(my_entry.fattr);
- nfs_free_fhandle(my_entry.fh);
dfprintk(FILE, "NFS: readdir(%s/%s) returns %d\n",
dentry->d_parent->d_name.name, dentry->d_name.name,
res);
return 1;
}
+static struct nfs_open_context *nameidata_to_nfs_open_context(struct dentry *dentry, struct nameidata *nd)
+{
+ struct path path = {
+ .mnt = nd->path.mnt,
+ .dentry = dentry,
+ };
+ struct nfs_open_context *ctx;
+ struct rpc_cred *cred;
+ fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
+
+ cred = rpc_lookup_cred();
+ if (IS_ERR(cred))
+ return ERR_CAST(cred);
+ ctx = alloc_nfs_open_context(&path, cred, fmode);
+ put_rpccred(cred);
+ if (ctx == NULL)
+ return ERR_PTR(-ENOMEM);
+ return ctx;
+}
+
+static int do_open(struct inode *inode, struct file *filp)
+{
+ nfs_fscache_set_inode_cookie(inode, filp);
+ return 0;
+}
+
+static int nfs_intent_set_file(struct nameidata *nd, struct nfs_open_context *ctx)
+{
+ struct file *filp;
+ int ret = 0;
+
+ /* If the open_intent is for execute, we have an extra check to make */
+ if (ctx->mode & FMODE_EXEC) {
+ ret = nfs_may_open(ctx->path.dentry->d_inode,
+ ctx->cred,
+ nd->intent.open.flags);
+ if (ret < 0)
+ goto out;
+ }
+ filp = lookup_instantiate_filp(nd, ctx->path.dentry, do_open);
+ if (IS_ERR(filp))
+ ret = PTR_ERR(filp);
+ else
+ nfs_file_set_open_context(filp, ctx);
+out:
+ put_nfs_open_context(ctx);
+ return ret;
+}
+
static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
{
+ struct nfs_open_context *ctx;
+ struct iattr attr;
struct dentry *res = NULL;
- int error;
+ struct inode *inode;
+ int open_flags;
+ int err;
dfprintk(VFS, "NFS: atomic_lookup(%s/%ld), %s\n",
dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);
goto out;
}
+ ctx = nameidata_to_nfs_open_context(dentry, nd);
+ res = ERR_CAST(ctx);
+ if (IS_ERR(ctx))
+ goto out;
+
+ open_flags = nd->intent.open.flags;
+ if (nd->flags & LOOKUP_CREATE) {
+ attr.ia_mode = nd->intent.open.create_mode;
+ attr.ia_valid = ATTR_MODE;
+ if (!IS_POSIXACL(dir))
+ attr.ia_mode &= ~current_umask();
+ } else {
+ open_flags &= ~(O_EXCL | O_CREAT);
+ attr.ia_valid = 0;
+ }
+
/* Open the file on the server */
- res = nfs4_atomic_open(dir, dentry, nd);
- if (IS_ERR(res)) {
- error = PTR_ERR(res);
- switch (error) {
+ nfs_block_sillyrename(dentry->d_parent);
+ inode = NFS_PROTO(dir)->open_context(dir, ctx, open_flags, &attr);
+ if (IS_ERR(inode)) {
+ nfs_unblock_sillyrename(dentry->d_parent);
+ put_nfs_open_context(ctx);
+ switch (PTR_ERR(inode)) {
/* Make a negative dentry */
case -ENOENT:
+ d_add(dentry, NULL);
res = NULL;
goto out;
/* This turned out not to be a regular file */
goto no_open;
/* case -EINVAL: */
default:
+ res = ERR_CAST(inode);
goto out;
}
- } else if (res != NULL)
+ }
+ res = d_add_unique(dentry, inode);
+ nfs_unblock_sillyrename(dentry->d_parent);
+ if (res != NULL) {
+ dput(ctx->path.dentry);
+ ctx->path.dentry = dget(res);
dentry = res;
+ }
+ err = nfs_intent_set_file(nd, ctx);
+ if (err < 0) {
+ if (res != NULL)
+ dput(res);
+ return ERR_PTR(err);
+ }
out:
+ nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
return res;
no_open:
return nfs_lookup(dir, dentry, nd);
struct dentry *parent = NULL;
struct inode *inode = dentry->d_inode;
struct inode *dir;
+ struct nfs_open_context *ctx;
int openflags, ret = 0;
if (!is_atomic_open(nd) || d_mountpoint(dentry))
goto no_open;
+
parent = dget_parent(dentry);
dir = parent->d_inode;
+
/* We can't create new files in nfs_open_revalidate(), so we
* optimize away revalidation of negative dentries.
*/
/* We can't create new files, or truncate existing ones here */
openflags &= ~(O_CREAT|O_EXCL|O_TRUNC);
+ ctx = nameidata_to_nfs_open_context(dentry, nd);
+ ret = PTR_ERR(ctx);
+ if (IS_ERR(ctx))
+ goto out;
/*
* Note: we're not holding inode->i_mutex and so may be racing with
* operations that change the directory. We therefore save the
* change attribute *before* we do the RPC call.
*/
- ret = nfs4_open_revalidate(dir, dentry, openflags, nd);
+ inode = NFS_PROTO(dir)->open_context(dir, ctx, openflags, NULL);
+ if (IS_ERR(inode)) {
+ ret = PTR_ERR(inode);
+ switch (ret) {
+ case -EPERM:
+ case -EACCES:
+ case -EDQUOT:
+ case -ENOSPC:
+ case -EROFS:
+ goto out_put_ctx;
+ default:
+ goto out_drop;
+ }
+ }
+ iput(inode);
+ if (inode != dentry->d_inode)
+ goto out_drop;
+
+ nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
+ ret = nfs_intent_set_file(nd, ctx);
+ if (ret >= 0)
+ ret = 1;
out:
dput(parent);
- if (!ret)
- d_drop(dentry);
return ret;
+out_drop:
+ d_drop(dentry);
+ ret = 0;
+out_put_ctx:
+ put_nfs_open_context(ctx);
+ goto out;
+
no_open_dput:
dput(parent);
no_open:
return nfs_lookup_revalidate(dentry, nd);
}
-#endif /* CONFIG_NFSV4 */
-static struct dentry *nfs_readdir_lookup(nfs_readdir_descriptor_t *desc)
+static int nfs_open_create(struct inode *dir, struct dentry *dentry, int mode,
+ struct nameidata *nd)
{
- struct dentry *parent = desc->file->f_path.dentry;
- struct inode *dir = parent->d_inode;
- struct nfs_entry *entry = desc->entry;
- struct dentry *dentry, *alias;
- struct qstr name = {
- .name = entry->name,
- .len = entry->len,
- };
- struct inode *inode;
- unsigned long verf = nfs_save_change_attribute(dir);
+ struct nfs_open_context *ctx = NULL;
+ struct iattr attr;
+ int error;
+ int open_flags = 0;
- switch (name.len) {
- case 2:
- if (name.name[0] == '.' && name.name[1] == '.')
- return dget_parent(parent);
- break;
- case 1:
- if (name.name[0] == '.')
- return dget(parent);
- }
+ dfprintk(VFS, "NFS: create(%s/%ld), %s\n",
+ dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);
- spin_lock(&dir->i_lock);
- if (NFS_I(dir)->cache_validity & NFS_INO_INVALID_DATA) {
- spin_unlock(&dir->i_lock);
- return NULL;
- }
- spin_unlock(&dir->i_lock);
+ attr.ia_mode = mode;
+ attr.ia_valid = ATTR_MODE;
- name.hash = full_name_hash(name.name, name.len);
- dentry = d_lookup(parent, &name);
- if (dentry != NULL) {
- /* Is this a positive dentry that matches the readdir info? */
- if (dentry->d_inode != NULL &&
- (NFS_FILEID(dentry->d_inode) == entry->ino ||
- d_mountpoint(dentry))) {
- if (!desc->plus || entry->fh->size == 0)
- return dentry;
- if (nfs_compare_fh(NFS_FH(dentry->d_inode),
- entry->fh) == 0)
- goto out_renew;
- }
- /* No, so d_drop to allow one to be created */
- d_drop(dentry);
- dput(dentry);
- }
- if (!desc->plus || !(entry->fattr->valid & NFS_ATTR_FATTR))
- return NULL;
- if (name.len > NFS_SERVER(dir)->namelen)
- return NULL;
- /* Note: caller is already holding the dir->i_mutex! */
- dentry = d_alloc(parent, &name);
- if (dentry == NULL)
- return NULL;
- dentry->d_op = NFS_PROTO(dir)->dentry_ops;
- inode = nfs_fhget(dentry->d_sb, entry->fh, entry->fattr);
- if (IS_ERR(inode)) {
- dput(dentry);
- return NULL;
- }
+ if ((nd->flags & LOOKUP_CREATE) != 0) {
+ open_flags = nd->intent.open.flags;
- alias = d_materialise_unique(dentry, inode);
- if (alias != NULL) {
- dput(dentry);
- if (IS_ERR(alias))
- return NULL;
- dentry = alias;
+ ctx = nameidata_to_nfs_open_context(dentry, nd);
+ error = PTR_ERR(ctx);
+ if (IS_ERR(ctx))
+ goto out_err_drop;
}
-out_renew:
- nfs_set_verifier(dentry, verf);
- return dentry;
+ error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, ctx);
+ if (error != 0)
+ goto out_put_ctx;
+ if (ctx != NULL) {
+ error = nfs_intent_set_file(nd, ctx);
+ if (error < 0)
+ goto out_err;
+ }
+ return 0;
+out_put_ctx:
+ if (ctx != NULL)
+ put_nfs_open_context(ctx);
+out_err_drop:
+ d_drop(dentry);
+out_err:
+ return error;
}
+#endif /* CONFIG_NFSV4 */
+
/*
* Code common to create, mkdir, and mknod.
*/
{
struct iattr attr;
int error;
- int open_flags = 0;
dfprintk(VFS, "NFS: create(%s/%ld), %s\n",
dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);
attr.ia_mode = mode;
attr.ia_valid = ATTR_MODE;
- if ((nd->flags & LOOKUP_CREATE) != 0)
- open_flags = nd->intent.open.flags;
-
- error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, nd);
+ error = NFS_PROTO(dir)->create(dir, dentry, &attr, 0, NULL);
if (error != 0)
goto out_err;
return 0;
return error;
}
-static int nfs_sillyrename(struct inode *dir, struct dentry *dentry)
-{
- static unsigned int sillycounter;
- const int fileidsize = sizeof(NFS_FILEID(dentry->d_inode))*2;
- const int countersize = sizeof(sillycounter)*2;
- const int slen = sizeof(".nfs")+fileidsize+countersize-1;
- char silly[slen+1];
- struct qstr qsilly;
- struct dentry *sdentry;
- int error = -EIO;
-
- dfprintk(VFS, "NFS: silly-rename(%s/%s, ct=%d)\n",
- dentry->d_parent->d_name.name, dentry->d_name.name,
- atomic_read(&dentry->d_count));
- nfs_inc_stats(dir, NFSIOS_SILLYRENAME);
-
- /*
- * We don't allow a dentry to be silly-renamed twice.
- */
- error = -EBUSY;
- if (dentry->d_flags & DCACHE_NFSFS_RENAMED)
- goto out;
-
- sprintf(silly, ".nfs%*.*Lx",
- fileidsize, fileidsize,
- (unsigned long long)NFS_FILEID(dentry->d_inode));
-
- /* Return delegation in anticipation of the rename */
- nfs_inode_return_delegation(dentry->d_inode);
-
- sdentry = NULL;
- do {
- char *suffix = silly + slen - countersize;
-
- dput(sdentry);
- sillycounter++;
- sprintf(suffix, "%*.*x", countersize, countersize, sillycounter);
-
- dfprintk(VFS, "NFS: trying to rename %s to %s\n",
- dentry->d_name.name, silly);
-
- 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(sdentry->d_inode != NULL); /* need negative lookup */
-
- qsilly.name = silly;
- qsilly.len = strlen(silly);
- if (dentry->d_inode) {
- error = NFS_PROTO(dir)->rename(dir, &dentry->d_name,
- dir, &qsilly);
- nfs_mark_for_revalidate(dentry->d_inode);
- } else
- error = NFS_PROTO(dir)->rename(dir, &dentry->d_name,
- dir, &qsilly);
- if (!error) {
- nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
- d_move(dentry, sdentry);
- error = nfs_async_unlink(dir, dentry);
- /* If we return 0 we don't unlink */
- }
- dput(sdentry);
-out:
- return error;
-}
-
/*
* Remove a file after making sure there are no pending writes,
* and after checking that the file has only one user.
int nfs_access_cache_shrinker(struct shrinker *shrink, int nr_to_scan, gfp_t gfp_mask)
{
LIST_HEAD(head);
- struct nfs_inode *nfsi;
+ struct nfs_inode *nfsi, *next;
struct nfs_access_entry *cache;
if ((gfp_mask & GFP_KERNEL) != GFP_KERNEL)
return (nr_to_scan == 0) ? 0 : -1;
spin_lock(&nfs_access_lru_lock);
- list_for_each_entry(nfsi, &nfs_access_lru_list, access_cache_inode_lru) {
+ list_for_each_entry_safe(nfsi, next, &nfs_access_lru_list, access_cache_inode_lru) {
struct inode *inode;
if (nr_to_scan-- == 0)
struct file *filp = vma->vm_file;
struct dentry *dentry = filp->f_path.dentry;
unsigned pagelen;
- int ret = -EINVAL;
+ int ret = VM_FAULT_NOPAGE;
struct address_space *mapping;
dfprintk(PAGECACHE, "NFS: vm_page_mkwrite(%s/%s(%ld), offset %lld)\n",
if (mapping != dentry->d_inode->i_mapping)
goto out_unlock;
- ret = 0;
pagelen = nfs_page_length(page);
if (pagelen == 0)
goto out_unlock;
- ret = nfs_flush_incompatible(filp, page);
- if (ret != 0)
- goto out_unlock;
+ ret = VM_FAULT_LOCKED;
+ if (nfs_flush_incompatible(filp, page) == 0 &&
+ nfs_updatepage(filp, page, 0, pagelen) == 0)
+ goto out;
- ret = nfs_updatepage(filp, page, 0, pagelen);
+ ret = VM_FAULT_SIGBUS;
out_unlock:
- if (!ret)
- return VM_FAULT_LOCKED;
unlock_page(page);
- return VM_FAULT_SIGBUS;
+out:
+ return ret;
}
static const struct vm_operations_struct nfs_file_vm_ops = {
return ret;
}
-static int do_getlk(struct file *filp, int cmd, struct file_lock *fl)
+static int
+do_getlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
{
struct inode *inode = filp->f_mapping->host;
int status = 0;
if (nfs_have_delegation(inode, FMODE_READ))
goto out_noconflict;
- if (NFS_SERVER(inode)->flags & NFS_MOUNT_NONLM)
+ if (is_local)
goto out_noconflict;
status = NFS_PROTO(inode)->lock(filp, cmd, fl);
return res;
}
-static int do_unlk(struct file *filp, int cmd, struct file_lock *fl)
+static int
+do_unlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
{
struct inode *inode = filp->f_mapping->host;
int status;
* If we're signalled while cleaning up locks on process exit, we
* still need to complete the unlock.
*/
- /* Use local locking if mounted with "-onolock" */
- if (!(NFS_SERVER(inode)->flags & NFS_MOUNT_NONLM))
+ /*
+ * Use local locking if mounted with "-onolock" or with appropriate
+ * "-olocal_lock="
+ */
+ if (!is_local)
status = NFS_PROTO(inode)->lock(filp, cmd, fl);
else
status = do_vfs_lock(filp, fl);
return status;
}
-static int do_setlk(struct file *filp, int cmd, struct file_lock *fl)
+static int
+is_time_granular(struct timespec *ts) {
+ return ((ts->tv_sec == 0) && (ts->tv_nsec <= 1000));
+}
+
+static int
+do_setlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
{
struct inode *inode = filp->f_mapping->host;
int status;
if (status != 0)
goto out;
- /* Use local locking if mounted with "-onolock" */
- if (!(NFS_SERVER(inode)->flags & NFS_MOUNT_NONLM))
+ /*
+ * Use local locking if mounted with "-onolock" or with appropriate
+ * "-olocal_lock="
+ */
+ if (!is_local)
status = NFS_PROTO(inode)->lock(filp, cmd, fl);
else
status = do_vfs_lock(filp, fl);
if (status < 0)
goto out;
+
/*
- * Make sure we clear the cache whenever we try to get the lock.
+ * Revalidate the cache if the server has time stamps granular
+ * enough to detect subsecond changes. Otherwise, clear the
+ * cache to prevent missing any changes.
+ *
* This makes locking act as a cache coherency point.
*/
nfs_sync_mapping(filp->f_mapping);
- if (!nfs_have_delegation(inode, FMODE_READ))
- nfs_zap_caches(inode);
+ if (!nfs_have_delegation(inode, FMODE_READ)) {
+ if (is_time_granular(&NFS_SERVER(inode)->time_delta))
+ __nfs_revalidate_inode(NFS_SERVER(inode), inode);
+ else
+ nfs_zap_caches(inode);
+ }
out:
return status;
}
{
struct inode *inode = filp->f_mapping->host;
int ret = -ENOLCK;
+ int is_local = 0;
dprintk("NFS: lock(%s/%s, t=%x, fl=%x, r=%lld:%lld)\n",
filp->f_path.dentry->d_parent->d_name.name,
if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK)
goto out_err;
+ if (NFS_SERVER(inode)->flags & NFS_MOUNT_LOCAL_FCNTL)
+ is_local = 1;
+
if (NFS_PROTO(inode)->lock_check_bounds != NULL) {
ret = NFS_PROTO(inode)->lock_check_bounds(fl);
if (ret < 0)
}
if (IS_GETLK(cmd))
- ret = do_getlk(filp, cmd, fl);
+ ret = do_getlk(filp, cmd, fl, is_local);
else if (fl->fl_type == F_UNLCK)
- ret = do_unlk(filp, cmd, fl);
+ ret = do_unlk(filp, cmd, fl, is_local);
else
- ret = do_setlk(filp, cmd, fl);
+ ret = do_setlk(filp, cmd, fl, is_local);
out_err:
return ret;
}
*/
static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl)
{
+ struct inode *inode = filp->f_mapping->host;
+ int is_local = 0;
+
dprintk("NFS: flock(%s/%s, t=%x, fl=%x)\n",
filp->f_path.dentry->d_parent->d_name.name,
filp->f_path.dentry->d_name.name,
if (!(fl->fl_flags & FL_FLOCK))
return -ENOLCK;
+ if (NFS_SERVER(inode)->flags & NFS_MOUNT_LOCAL_FLOCK)
+ is_local = 1;
+
/* We're simulating flock() locks using posix locks on the server */
fl->fl_owner = (fl_owner_t)filp;
fl->fl_start = 0;
fl->fl_end = OFFSET_MAX;
if (fl->fl_type == F_UNLCK)
- return do_unlk(filp, cmd, fl);
- return do_setlk(filp, cmd, fl);
+ return do_unlk(filp, cmd, fl, is_local);
+ return do_setlk(filp, cmd, fl, is_local);
}
/*
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
+#ifdef CONFIG_NFS_USE_NEW_IDMAPPER
+
+#include <linux/slab.h>
+#include <linux/cred.h>
+#include <linux/nfs_idmap.h>
+#include <linux/keyctl.h>
+#include <linux/key-type.h>
+#include <linux/rcupdate.h>
+#include <linux/kernel.h>
+#include <linux/err.h>
+
+#include <keys/user-type.h>
+
+#define NFS_UINT_MAXLEN 11
+
+const struct cred *id_resolver_cache;
+
+struct key_type key_type_id_resolver = {
+ .name = "id_resolver",
+ .instantiate = user_instantiate,
+ .match = user_match,
+ .revoke = user_revoke,
+ .destroy = user_destroy,
+ .describe = user_describe,
+ .read = user_read,
+};
+
+int nfs_idmap_init(void)
+{
+ struct cred *cred;
+ struct key *keyring;
+ int ret = 0;
+
+ printk(KERN_NOTICE "Registering the %s key type\n", key_type_id_resolver.name);
+
+ cred = prepare_kernel_cred(NULL);
+ if (!cred)
+ return -ENOMEM;
+
+ keyring = key_alloc(&key_type_keyring, ".id_resolver", 0, 0, cred,
+ (KEY_POS_ALL & ~KEY_POS_SETATTR) |
+ KEY_USR_VIEW | KEY_USR_READ,
+ KEY_ALLOC_NOT_IN_QUOTA);
+ if (IS_ERR(keyring)) {
+ ret = PTR_ERR(keyring);
+ goto failed_put_cred;
+ }
+
+ ret = key_instantiate_and_link(keyring, NULL, 0, NULL, NULL);
+ if (ret < 0)
+ goto failed_put_key;
+
+ ret = register_key_type(&key_type_id_resolver);
+ if (ret < 0)
+ goto failed_put_key;
+
+ cred->thread_keyring = keyring;
+ cred->jit_keyring = KEY_REQKEY_DEFL_THREAD_KEYRING;
+ id_resolver_cache = cred;
+ return 0;
+
+failed_put_key:
+ key_put(keyring);
+failed_put_cred:
+ put_cred(cred);
+ return ret;
+}
+
+void nfs_idmap_quit(void)
+{
+ key_revoke(id_resolver_cache->thread_keyring);
+ unregister_key_type(&key_type_id_resolver);
+ put_cred(id_resolver_cache);
+}
+
+/*
+ * Assemble the description to pass to request_key()
+ * This function will allocate a new string and update dest to point
+ * at it. The caller is responsible for freeing dest.
+ *
+ * On error 0 is returned. Otherwise, the length of dest is returned.
+ */
+static ssize_t nfs_idmap_get_desc(const char *name, size_t namelen,
+ const char *type, size_t typelen, char **desc)
+{
+ char *cp;
+ size_t desclen = typelen + namelen + 2;
+
+ *desc = kmalloc(desclen, GFP_KERNEL);
+ if (!desc)
+ return -ENOMEM;
+
+ cp = *desc;
+ memcpy(cp, type, typelen);
+ cp += typelen;
+ *cp++ = ':';
+
+ memcpy(cp, name, namelen);
+ cp += namelen;
+ *cp = '\0';
+ return desclen;
+}
+
+static ssize_t nfs_idmap_request_key(const char *name, size_t namelen,
+ const char *type, void *data, size_t data_size)
+{
+ const struct cred *saved_cred;
+ struct key *rkey;
+ char *desc;
+ struct user_key_payload *payload;
+ ssize_t ret;
+
+ ret = nfs_idmap_get_desc(name, namelen, type, strlen(type), &desc);
+ if (ret <= 0)
+ goto out;
+
+ saved_cred = override_creds(id_resolver_cache);
+ rkey = request_key(&key_type_id_resolver, desc, "");
+ revert_creds(saved_cred);
+ kfree(desc);
+ if (IS_ERR(rkey)) {
+ ret = PTR_ERR(rkey);
+ goto out;
+ }
+
+ rcu_read_lock();
+ rkey->perm |= KEY_USR_VIEW;
+
+ ret = key_validate(rkey);
+ if (ret < 0)
+ goto out_up;
+
+ payload = rcu_dereference(rkey->payload.data);
+ if (IS_ERR_OR_NULL(payload)) {
+ ret = PTR_ERR(payload);
+ goto out_up;
+ }
+
+ ret = payload->datalen;
+ if (ret > 0 && ret <= data_size)
+ memcpy(data, payload->data, ret);
+ else
+ ret = -EINVAL;
+
+out_up:
+ rcu_read_unlock();
+ key_put(rkey);
+out:
+ return ret;
+}
+
+
+/* ID -> Name */
+static ssize_t nfs_idmap_lookup_name(__u32 id, const char *type, char *buf, size_t buflen)
+{
+ char id_str[NFS_UINT_MAXLEN];
+ int id_len;
+ ssize_t ret;
+
+ id_len = snprintf(id_str, sizeof(id_str), "%u", id);
+ ret = nfs_idmap_request_key(id_str, id_len, type, buf, buflen);
+ if (ret < 0)
+ return -EINVAL;
+ return ret;
+}
+
+/* Name -> ID */
+static int nfs_idmap_lookup_id(const char *name, size_t namelen,
+ const char *type, __u32 *id)
+{
+ char id_str[NFS_UINT_MAXLEN];
+ long id_long;
+ ssize_t data_size;
+ int ret = 0;
+
+ data_size = nfs_idmap_request_key(name, namelen, type, id_str, NFS_UINT_MAXLEN);
+ if (data_size <= 0) {
+ ret = -EINVAL;
+ } else {
+ ret = strict_strtol(id_str, 10, &id_long);
+ *id = (__u32)id_long;
+ }
+ return ret;
+}
+
+int nfs_map_name_to_uid(struct nfs_client *clp, const char *name, size_t namelen, __u32 *uid)
+{
+ return nfs_idmap_lookup_id(name, namelen, "uid", uid);
+}
+
+int nfs_map_group_to_gid(struct nfs_client *clp, const char *name, size_t namelen, __u32 *gid)
+{
+ return nfs_idmap_lookup_id(name, namelen, "gid", gid);
+}
+
+int nfs_map_uid_to_name(struct nfs_client *clp, __u32 uid, char *buf, size_t buflen)
+{
+ return nfs_idmap_lookup_name(uid, "user", buf, buflen);
+}
+int nfs_map_gid_to_group(struct nfs_client *clp, __u32 gid, char *buf, size_t buflen)
+{
+ return nfs_idmap_lookup_name(gid, "group", buf, buflen);
+}
+
+#else /* CONFIG_NFS_USE_IDMAPPER not defined */
+
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/init.h>
return nfs_idmap_id(idmap, &idmap->idmap_group_hash, name, namelen, uid);
}
-int nfs_map_uid_to_name(struct nfs_client *clp, __u32 uid, char *buf)
+int nfs_map_uid_to_name(struct nfs_client *clp, __u32 uid, char *buf, size_t buflen)
{
struct idmap *idmap = clp->cl_idmap;
return nfs_idmap_name(idmap, &idmap->idmap_user_hash, uid, buf);
}
-int nfs_map_gid_to_group(struct nfs_client *clp, __u32 uid, char *buf)
+int nfs_map_gid_to_group(struct nfs_client *clp, __u32 uid, char *buf, size_t buflen)
{
struct idmap *idmap = clp->cl_idmap;
return nfs_idmap_name(idmap, &idmap->idmap_group_hash, uid, buf);
}
+#endif /* CONFIG_NFS_USE_NEW_IDMAPPER */
return 0;
}
-/* Don't use READDIRPLUS on directories that we believe are too large */
-#define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
-
/*
* This is our front-end to iget that looks up inodes by file handle
* instead of inode number.
} else if (S_ISDIR(inode->i_mode)) {
inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
inode->i_fop = &nfs_dir_operations;
- if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)
- && fattr->size <= NFS_LIMIT_READDIRPLUS)
+ if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS))
set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
/* Deal with crossing mountpoints */
if ((fattr->valid & NFS_ATTR_FATTR_FSID)
nfs_revalidate_inode(server, inode);
}
-static struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred)
+struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred, fmode_t f_mode)
{
struct nfs_open_context *ctx;
path_get(&ctx->path);
ctx->cred = get_rpccred(cred);
ctx->state = NULL;
+ ctx->mode = f_mode;
ctx->flags = 0;
ctx->error = 0;
ctx->dir_cookie = 0;
nfs_init_lock_context(&ctx->lock_context);
ctx->lock_context.open_context = ctx;
+ INIT_LIST_HEAD(&ctx->list);
}
return ctx;
}
{
struct inode *inode = ctx->path.dentry->d_inode;
- if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock))
+ if (!list_empty(&ctx->list)) {
+ if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock))
+ return;
+ list_del(&ctx->list);
+ spin_unlock(&inode->i_lock);
+ } else if (!atomic_dec_and_test(&ctx->lock_context.count))
return;
- list_del(&ctx->list);
- spin_unlock(&inode->i_lock);
- NFS_PROTO(inode)->close_context(ctx, is_sync);
+ if (inode != NULL)
+ NFS_PROTO(inode)->close_context(ctx, is_sync);
if (ctx->cred != NULL)
put_rpccred(ctx->cred);
path_put(&ctx->path);
* Ensure that mmap has a recent RPC credential for use when writing out
* shared pages
*/
-static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
+void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
{
struct inode *inode = filp->f_path.dentry->d_inode;
struct nfs_inode *nfsi = NFS_I(inode);
cred = rpc_lookup_cred();
if (IS_ERR(cred))
return PTR_ERR(cred);
- ctx = alloc_nfs_open_context(&filp->f_path, cred);
+ ctx = alloc_nfs_open_context(&filp->f_path, cred, filp->f_mode);
put_rpccred(cred);
if (ctx == NULL)
return -ENOMEM;
- ctx->mode = filp->f_mode;
nfs_file_set_open_context(filp, ctx);
put_nfs_open_context(ctx);
nfs_fscache_set_inode_cookie(inode, filp);
{
struct workqueue_struct *wq;
dprintk("RPC: creating workqueue nfsiod\n");
- wq = create_singlethread_workqueue("nfsiod");
+ wq = alloc_workqueue("nfsiod", WQ_RESCUER, 0);
if (wq == NULL)
return -ENOMEM;
nfsiod_workqueue = wq;
{
int err;
+ err = nfs_idmap_init();
+ if (err < 0)
+ goto out9;
+
err = nfs_dns_resolver_init();
if (err < 0)
goto out8;
out7:
nfs_dns_resolver_destroy();
out8:
+ nfs_idmap_quit();
+out9:
return err;
}
nfs_destroy_nfspagecache();
nfs_fscache_unregister();
nfs_dns_resolver_destroy();
+ nfs_idmap_quit();
#ifdef CONFIG_PROC_FS
rpc_proc_unregister("nfs");
#endif
*/
#define NFS_UNSPEC_PORT (-1)
+/*
+ * Maximum number of pages that readdir can use for creating
+ * a vmapped array of pages.
+ */
+#define NFS_MAX_READDIR_PAGES 8
+
/*
* In-kernel mount arguments
*/
/* nfs2xdr.c */
extern int nfs_stat_to_errno(int);
extern struct rpc_procinfo nfs_procedures[];
-extern __be32 * nfs_decode_dirent(__be32 *, struct nfs_entry *, int);
+extern __be32 *nfs_decode_dirent(struct xdr_stream *, struct nfs_entry *, struct nfs_server *, int);
/* nfs3xdr.c */
extern struct rpc_procinfo nfs3_procedures[];
-extern __be32 *nfs3_decode_dirent(__be32 *, struct nfs_entry *, int);
+extern __be32 *nfs3_decode_dirent(struct xdr_stream *, struct nfs_entry *, struct nfs_server *, int);
/* nfs4xdr.c */
#ifdef CONFIG_NFS_V4
-extern __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus);
+extern __be32 *nfs4_decode_dirent(struct xdr_stream *, struct nfs_entry *, struct nfs_server *, int);
#endif
#ifdef CONFIG_NFS_V4_1
extern const u32 nfs41_maxread_overhead;
for (i = 0; i < entries; i++) {
flavors[i] = ntohl(*p++);
- dprintk("NFS:\tflavor %u: %d\n", i, flavors[i]);
+ dprintk("NFS: auth flavor[%u]: %d\n", i, flavors[i]);
}
*count = i;
static int
nfs_xdr_renameargs(struct rpc_rqst *req, __be32 *p, struct nfs_renameargs *args)
{
- p = xdr_encode_fhandle(p, args->fromfh);
- p = xdr_encode_array(p, args->fromname, args->fromlen);
- p = xdr_encode_fhandle(p, args->tofh);
- p = xdr_encode_array(p, args->toname, args->tolen);
+ p = xdr_encode_fhandle(p, args->old_dir);
+ p = xdr_encode_array(p, args->old_name->name, args->old_name->len);
+ p = xdr_encode_fhandle(p, args->new_dir);
+ p = xdr_encode_array(p, args->new_name->name, args->new_name->len);
req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
return 0;
}
struct page **page;
size_t hdrlen;
unsigned int pglen, recvd;
- u32 len;
int status, nr = 0;
- __be32 *end, *entry, *kaddr;
if ((status = ntohl(*p++)))
return nfs_stat_to_errno(status);
if (pglen > recvd)
pglen = recvd;
page = rcvbuf->pages;
- kaddr = p = kmap_atomic(*page, KM_USER0);
- end = (__be32 *)((char *)p + pglen);
- entry = p;
-
- /* Make sure the packet actually has a value_follows and EOF entry */
- if ((entry + 1) > end)
- goto short_pkt;
-
- for (; *p++; nr++) {
- if (p + 2 > end)
- goto short_pkt;
- p++; /* fileid */
- len = ntohl(*p++);
- p += XDR_QUADLEN(len) + 1; /* name plus cookie */
- if (len > NFS2_MAXNAMLEN) {
- dprintk("NFS: giant filename in readdir (len 0x%x)!\n",
- len);
- goto err_unmap;
- }
- if (p + 2 > end)
- goto short_pkt;
- entry = p;
- }
-
- /*
- * Apparently some server sends responses that are a valid size, but
- * contain no entries, and have value_follows==0 and EOF==0. For
- * those, just set the EOF marker.
- */
- if (!nr && entry[1] == 0) {
- dprintk("NFS: readdir reply truncated!\n");
- entry[1] = 1;
- }
- out:
- kunmap_atomic(kaddr, KM_USER0);
return nr;
- short_pkt:
- /*
- * When we get a short packet there are 2 possibilities. We can
- * return an error, or fix up the response to look like a valid
- * response and return what we have so far. If there are no
- * entries and the packet was short, then return -EIO. If there
- * are valid entries in the response, return them and pretend that
- * the call was successful, but incomplete. The caller can retry the
- * readdir starting at the last cookie.
- */
- entry[0] = entry[1] = 0;
- if (!nr)
- nr = -errno_NFSERR_IO;
- goto out;
-err_unmap:
- nr = -errno_NFSERR_IO;
- goto out;
+}
+
+static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
+{
+ dprintk("nfs: %s: prematurely hit end of receive buffer. "
+ "Remaining buffer length is %tu words.\n",
+ func, xdr->end - xdr->p);
}
__be32 *
-nfs_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
+nfs_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, struct nfs_server *server, int plus)
{
- if (!*p++) {
- if (!*p)
+ __be32 *p;
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ if (!ntohl(*p++)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ if (!ntohl(*p++))
return ERR_PTR(-EAGAIN);
entry->eof = 1;
return ERR_PTR(-EBADCOOKIE);
}
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+
entry->ino = ntohl(*p++);
entry->len = ntohl(*p++);
+
+ p = xdr_inline_decode(xdr, entry->len + 4);
+ if (unlikely(!p))
+ goto out_overflow;
entry->name = (const char *) p;
p += XDR_QUADLEN(entry->len);
entry->prev_cookie = entry->cookie;
entry->cookie = ntohl(*p++);
- entry->eof = !p[0] && p[1];
+
+ p = xdr_inline_peek(xdr, 8);
+ if (p != NULL)
+ entry->eof = !p[0] && p[1];
+ else
+ entry->eof = 0;
return p;
+
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return ERR_PTR(-EIO);
}
/*
struct kvec *iov = rcvbuf->head;
size_t hdrlen;
u32 len, recvd;
- char *kaddr;
int status;
if ((status = ntohl(*p++)))
return -EIO;
}
- /* NULL terminate the string we got */
- kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
- kaddr[len+rcvbuf->page_base] = '\0';
- kunmap_atomic(kaddr, KM_USER0);
+ xdr_terminate_string(rcvbuf, len);
return 0;
}
*/
static int
nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
- int flags, struct nameidata *nd)
+ int flags, struct nfs_open_context *ctx)
{
struct nfs3_createdata *data;
mode_t mode = sattr->ia_mode;
return 1;
}
+static void
+nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
+{
+ msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
+}
+
+static int
+nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
+ struct inode *new_dir)
+{
+ struct nfs_renameres *res;
+
+ if (nfs3_async_handle_jukebox(task, old_dir))
+ return 0;
+ res = task->tk_msg.rpc_resp;
+
+ nfs_post_op_update_inode(old_dir, res->old_fattr);
+ nfs_post_op_update_inode(new_dir, res->new_fattr);
+ return 1;
+}
+
static int
nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
struct inode *new_dir, struct qstr *new_name)
{
- struct nfs3_renameargs arg = {
- .fromfh = NFS_FH(old_dir),
- .fromname = old_name->name,
- .fromlen = old_name->len,
- .tofh = NFS_FH(new_dir),
- .toname = new_name->name,
- .tolen = new_name->len
+ struct nfs_renameargs arg = {
+ .old_dir = NFS_FH(old_dir),
+ .old_name = old_name,
+ .new_dir = NFS_FH(new_dir),
+ .new_name = new_name,
};
- struct nfs3_renameres res;
+ struct nfs_renameres res;
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_RENAME],
.rpc_argp = &arg,
dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name);
- res.fromattr = nfs_alloc_fattr();
- res.toattr = nfs_alloc_fattr();
- if (res.fromattr == NULL || res.toattr == NULL)
+ res.old_fattr = nfs_alloc_fattr();
+ res.new_fattr = nfs_alloc_fattr();
+ if (res.old_fattr == NULL || res.new_fattr == NULL)
goto out;
status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
- nfs_post_op_update_inode(old_dir, res.fromattr);
- nfs_post_op_update_inode(new_dir, res.toattr);
+ nfs_post_op_update_inode(old_dir, res.old_fattr);
+ nfs_post_op_update_inode(new_dir, res.new_fattr);
out:
- nfs_free_fattr(res.toattr);
- nfs_free_fattr(res.fromattr);
+ nfs_free_fattr(res.old_fattr);
+ nfs_free_fattr(res.new_fattr);
dprintk("NFS reply rename: %d\n", status);
return status;
}
*/
static int
nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
- u64 cookie, struct page *page, unsigned int count, int plus)
+ u64 cookie, struct page **pages, unsigned int count, int plus)
{
struct inode *dir = dentry->d_inode;
__be32 *verf = NFS_COOKIEVERF(dir);
.verf = {verf[0], verf[1]},
.plus = plus,
.count = count,
- .pages = &page
+ .pages = pages
};
struct nfs3_readdirres res = {
.verf = verf,
nfs_free_fattr(res.dir_attr);
out:
- dprintk("NFS reply readdir: %d\n", status);
+ dprintk("NFS reply readdir%s: %d\n",
+ plus? "plus" : "", status);
return status;
}
dprintk("NFS call fsstat\n");
nfs_fattr_init(stat->fattr);
status = rpc_call_sync(server->client, &msg, 0);
- dprintk("NFS reply statfs: %d\n", status);
+ dprintk("NFS reply fsstat: %d\n", status);
return status;
}
.unlink_setup = nfs3_proc_unlink_setup,
.unlink_done = nfs3_proc_unlink_done,
.rename = nfs3_proc_rename,
+ .rename_setup = nfs3_proc_rename_setup,
+ .rename_done = nfs3_proc_rename_done,
.link = nfs3_proc_link,
.symlink = nfs3_proc_symlink,
.mkdir = nfs3_proc_mkdir,
[NF3FIFO] = S_IFIFO,
};
+static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
+{
+ dprintk("nfs: %s: prematurely hit end of receive buffer. "
+ "Remaining buffer length is %tu words.\n",
+ func, xdr->end - xdr->p);
+}
+
/*
* Common NFS XDR functions as inlines
*/
return NULL;
}
+static inline __be32 *
+xdr_decode_fhandle_stream(struct xdr_stream *xdr, struct nfs_fh *fh)
+{
+ __be32 *p;
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ fh->size = ntohl(*p++);
+
+ if (fh->size <= NFS3_FHSIZE) {
+ p = xdr_inline_decode(xdr, fh->size);
+ if (unlikely(!p))
+ goto out_overflow;
+ memcpy(fh->data, p, fh->size);
+ return p + XDR_QUADLEN(fh->size);
+ }
+ return NULL;
+
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return ERR_PTR(-EIO);
+}
+
/*
* Encode/decode time.
*/
return p;
}
+static inline __be32 *
+xdr_decode_post_op_attr_stream(struct xdr_stream *xdr, struct nfs_fattr *fattr)
+{
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ if (ntohl(*p++)) {
+ p = xdr_inline_decode(xdr, 84);
+ if (unlikely(!p))
+ goto out_overflow;
+ p = xdr_decode_fattr(p, fattr);
+ }
+ return p;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return ERR_PTR(-EIO);
+}
+
static inline __be32 *
xdr_decode_pre_op_attr(__be32 *p, struct nfs_fattr *fattr)
{
* Encode RENAME arguments
*/
static int
-nfs3_xdr_renameargs(struct rpc_rqst *req, __be32 *p, struct nfs3_renameargs *args)
+nfs3_xdr_renameargs(struct rpc_rqst *req, __be32 *p, struct nfs_renameargs *args)
{
- p = xdr_encode_fhandle(p, args->fromfh);
- p = xdr_encode_array(p, args->fromname, args->fromlen);
- p = xdr_encode_fhandle(p, args->tofh);
- p = xdr_encode_array(p, args->toname, args->tolen);
+ p = xdr_encode_fhandle(p, args->old_dir);
+ p = xdr_encode_array(p, args->old_name->name, args->old_name->len);
+ p = xdr_encode_fhandle(p, args->new_dir);
+ p = xdr_encode_array(p, args->new_name->name, args->new_name->len);
req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
return 0;
}
struct kvec *iov = rcvbuf->head;
struct page **page;
size_t hdrlen;
- u32 len, recvd, pglen;
+ u32 recvd, pglen;
int status, nr = 0;
- __be32 *entry, *end, *kaddr;
status = ntohl(*p++);
/* Decode post_op_attrs */
if (pglen > recvd)
pglen = recvd;
page = rcvbuf->pages;
- kaddr = p = kmap_atomic(*page, KM_USER0);
- end = (__be32 *)((char *)p + pglen);
- entry = p;
-
- /* Make sure the packet actually has a value_follows and EOF entry */
- if ((entry + 1) > end)
- goto short_pkt;
-
- for (; *p++; nr++) {
- if (p + 3 > end)
- goto short_pkt;
- p += 2; /* inode # */
- len = ntohl(*p++); /* string length */
- p += XDR_QUADLEN(len) + 2; /* name + cookie */
- if (len > NFS3_MAXNAMLEN) {
- dprintk("NFS: giant filename in readdir (len 0x%x)!\n",
- len);
- goto err_unmap;
- }
- if (res->plus) {
- /* post_op_attr */
- if (p + 2 > end)
- goto short_pkt;
- if (*p++) {
- p += 21;
- if (p + 1 > end)
- goto short_pkt;
- }
- /* post_op_fh3 */
- if (*p++) {
- if (p + 1 > end)
- goto short_pkt;
- len = ntohl(*p++);
- if (len > NFS3_FHSIZE) {
- dprintk("NFS: giant filehandle in "
- "readdir (len 0x%x)!\n", len);
- goto err_unmap;
- }
- p += XDR_QUADLEN(len);
- }
- }
-
- if (p + 2 > end)
- goto short_pkt;
- entry = p;
- }
-
- /*
- * Apparently some server sends responses that are a valid size, but
- * contain no entries, and have value_follows==0 and EOF==0. For
- * those, just set the EOF marker.
- */
- if (!nr && entry[1] == 0) {
- dprintk("NFS: readdir reply truncated!\n");
- entry[1] = 1;
- }
- out:
- kunmap_atomic(kaddr, KM_USER0);
return nr;
- short_pkt:
- /*
- * When we get a short packet there are 2 possibilities. We can
- * return an error, or fix up the response to look like a valid
- * response and return what we have so far. If there are no
- * entries and the packet was short, then return -EIO. If there
- * are valid entries in the response, return them and pretend that
- * the call was successful, but incomplete. The caller can retry the
- * readdir starting at the last cookie.
- */
- entry[0] = entry[1] = 0;
- if (!nr)
- nr = -errno_NFSERR_IO;
- goto out;
-err_unmap:
- nr = -errno_NFSERR_IO;
- goto out;
}
__be32 *
-nfs3_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
+nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, struct nfs_server *server, int plus)
{
+ __be32 *p;
struct nfs_entry old = *entry;
- if (!*p++) {
- if (!*p)
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ if (!ntohl(*p++)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ if (!ntohl(*p++))
return ERR_PTR(-EAGAIN);
entry->eof = 1;
return ERR_PTR(-EBADCOOKIE);
}
+ p = xdr_inline_decode(xdr, 12);
+ if (unlikely(!p))
+ goto out_overflow;
p = xdr_decode_hyper(p, &entry->ino);
entry->len = ntohl(*p++);
+
+ p = xdr_inline_decode(xdr, entry->len + 8);
+ if (unlikely(!p))
+ goto out_overflow;
entry->name = (const char *) p;
p += XDR_QUADLEN(entry->len);
entry->prev_cookie = entry->cookie;
if (plus) {
entry->fattr->valid = 0;
- p = xdr_decode_post_op_attr(p, entry->fattr);
+ p = xdr_decode_post_op_attr_stream(xdr, entry->fattr);
+ if (IS_ERR(p))
+ goto out_overflow_exit;
/* In fact, a post_op_fh3: */
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
if (*p++) {
- p = xdr_decode_fhandle(p, entry->fh);
+ p = xdr_decode_fhandle_stream(xdr, entry->fh);
+ if (IS_ERR(p))
+ goto out_overflow_exit;
/* Ugh -- server reply was truncated */
if (p == NULL) {
dprintk("NFS: FH truncated\n");
memset((u8*)(entry->fh), 0, sizeof(*entry->fh));
}
- entry->eof = !p[0] && p[1];
+ p = xdr_inline_peek(xdr, 8);
+ if (p != NULL)
+ entry->eof = !p[0] && p[1];
+ else
+ entry->eof = 0;
+
return p;
+
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+out_overflow_exit:
+ return ERR_PTR(-EIO);
}
/*
struct kvec *iov = rcvbuf->head;
size_t hdrlen;
u32 len, recvd;
- char *kaddr;
int status;
status = ntohl(*p++);
return -EIO;
}
- /* NULL terminate the string we got */
- kaddr = (char*)kmap_atomic(rcvbuf->pages[0], KM_USER0);
- kaddr[len+rcvbuf->page_base] = '\0';
- kunmap_atomic(kaddr, KM_USER0);
+ xdr_terminate_string(rcvbuf, len);
return 0;
}
* Decode RENAME reply
*/
static int
-nfs3_xdr_renameres(struct rpc_rqst *req, __be32 *p, struct nfs3_renameres *res)
+nfs3_xdr_renameres(struct rpc_rqst *req, __be32 *p, struct nfs_renameres *res)
{
int status;
if ((status = ntohl(*p++)) != 0)
status = nfs_stat_to_errno(status);
- p = xdr_decode_wcc_data(p, res->fromattr);
- p = xdr_decode_wcc_data(p, res->toattr);
+ p = xdr_decode_wcc_data(p, res->old_fattr);
+ p = xdr_decode_wcc_data(p, res->new_fattr);
return status;
}
res->wtmult = ntohl(*p++);
res->dtpref = ntohl(*p++);
p = xdr_decode_hyper(p, &res->maxfilesize);
+ p = xdr_decode_time3(p, &res->time_delta);
- /* ignore time_delta and properties */
+ /* ignore properties */
res->lease_time = 0;
return 0;
}
extern int nfs4_init_clientid(struct nfs_client *, struct rpc_cred *);
extern int nfs41_init_clientid(struct nfs_client *, struct rpc_cred *);
extern int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait);
-extern struct dentry *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *);
-extern int nfs4_open_revalidate(struct inode *, struct dentry *, int, struct nameidata *);
extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle);
extern int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
struct nfs4_fs_locations *fs_locations, struct page *page);
extern const nfs4_stateid zero_stateid;
/* nfs4xdr.c */
-extern __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus);
+extern __be32 *nfs4_decode_dirent(struct xdr_stream *, struct nfs_entry *, struct nfs_server *, int);
extern struct rpc_procinfo nfs4_procedures[];
struct nfs4_mount_data;
| FATTR4_WORD0_MAXREAD
| FATTR4_WORD0_MAXWRITE
| FATTR4_WORD0_LEASE_TIME,
- 0
+ FATTR4_WORD1_TIME_DELTA
};
const u32 nfs4_fs_locations_bitmap[2] = {
nfs4_state_mark_reclaim_nograce(clp, state);
goto do_state_recovery;
case -NFS4ERR_STALE_STATEID:
- if (state == NULL)
- break;
- nfs4_state_mark_reclaim_reboot(clp, state);
case -NFS4ERR_STALE_CLIENTID:
case -NFS4ERR_EXPIRED:
goto do_state_recovery;
* Must be called while holding tbl->slot_tbl_lock
*/
static void
-nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
+nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
{
+ int free_slotid = free_slot - tbl->slots;
int slotid = free_slotid;
+ BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
/* clear used bit in bitmap */
__clear_bit(slotid, tbl->used_slots);
struct nfs4_slot_table *tbl;
tbl = &res->sr_session->fc_slot_table;
- if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
+ if (!res->sr_slot) {
/* just wake up the next guy waiting since
* we may have not consumed a slot after all */
dprintk("%s: No slot\n", __func__);
}
spin_lock(&tbl->slot_tbl_lock);
- nfs4_free_slot(tbl, res->sr_slotid);
+ nfs4_free_slot(tbl, res->sr_slot);
nfs41_check_drain_session_complete(res->sr_session);
spin_unlock(&tbl->slot_tbl_lock);
- res->sr_slotid = NFS4_MAX_SLOT_TABLE;
+ res->sr_slot = NULL;
}
static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
{
unsigned long timestamp;
- struct nfs4_slot_table *tbl;
- struct nfs4_slot *slot;
struct nfs_client *clp;
/*
res->sr_status = NFS_OK;
/* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
- if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
+ if (!res->sr_slot)
goto out;
- tbl = &res->sr_session->fc_slot_table;
- slot = tbl->slots + res->sr_slotid;
-
/* Check the SEQUENCE operation status */
switch (res->sr_status) {
case 0:
/* Update the slot's sequence and clientid lease timer */
- ++slot->seq_nr;
+ ++res->sr_slot->seq_nr;
timestamp = res->sr_renewal_time;
clp = res->sr_session->clp;
do_renew_lease(clp, timestamp);
* returned NFS4ERR_DELAY as per Section 2.10.6.2
* of RFC5661.
*/
- dprintk("%s: slot=%d seq=%d: Operation in progress\n",
- __func__, res->sr_slotid, slot->seq_nr);
+ dprintk("%s: slot=%ld seq=%d: Operation in progress\n",
+ __func__,
+ res->sr_slot - res->sr_session->fc_slot_table.slots,
+ res->sr_slot->seq_nr);
goto out_retry;
default:
/* Just update the slot sequence no. */
- ++slot->seq_nr;
+ ++res->sr_slot->seq_nr;
}
out:
/* The session may be reset by one of the error handlers. */
dprintk("--> %s\n", __func__);
/* slot already allocated? */
- if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
+ if (res->sr_slot != NULL)
return 0;
- res->sr_slotid = NFS4_MAX_SLOT_TABLE;
tbl = &session->fc_slot_table;
spin_lock(&tbl->slot_tbl_lock);
dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
res->sr_session = session;
- res->sr_slotid = slotid;
+ res->sr_slot = slot;
res->sr_renewal_time = jiffies;
res->sr_status_flags = 0;
/*
goto out;
}
- dprintk("--> %s clp %p session %p sr_slotid %d\n",
- __func__, session->clp, session, res->sr_slotid);
+ dprintk("--> %s clp %p session %p sr_slot %ld\n",
+ __func__, session->clp, session, res->sr_slot ?
+ res->sr_slot - session->fc_slot_table.slots : -1);
ret = nfs41_setup_sequence(session, args, res, cache_reply,
task);
.callback_data = &data
};
- res->sr_slotid = NFS4_MAX_SLOT_TABLE;
+ res->sr_slot = NULL;
if (privileged)
task_setup.callback_ops = &nfs41_call_priv_sync_ops;
task = rpc_run_task(&task_setup);
p->o_res.server = p->o_arg.server;
nfs_fattr_init(&p->f_attr);
nfs_fattr_init(&p->dir_attr);
- p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
}
static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
clear_bit(NFS_DELEGATED_STATE, &state->flags);
smp_rmb();
if (state->n_rdwr != 0) {
+ clear_bit(NFS_O_RDWR_STATE, &state->flags);
ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
if (ret != 0)
return ret;
return -ESTALE;
}
if (state->n_wronly != 0) {
+ clear_bit(NFS_O_WRONLY_STATE, &state->flags);
ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
if (ret != 0)
return ret;
return -ESTALE;
}
if (state->n_rdonly != 0) {
+ clear_bit(NFS_O_RDONLY_STATE, &state->flags);
ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
if (ret != 0)
return ret;
int err;
do {
err = _nfs4_do_open_reclaim(ctx, state);
- if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
+ if (err != -NFS4ERR_DELAY)
break;
nfs4_handle_exception(server, err, &exception);
} while (exception.retry);
case -NFS4ERR_ADMIN_REVOKED:
case -NFS4ERR_BAD_STATEID:
nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
+ case -EKEYEXPIRED:
+ /*
+ * User RPCSEC_GSS context has expired.
+ * We cannot recover this stateid now, so
+ * skip it and allow recovery thread to
+ * proceed.
+ */
case -ENOMEM:
err = 0;
goto out;
goto out;
case -NFS4ERR_GRACE:
case -NFS4ERR_DELAY:
- case -EKEYEXPIRED:
nfs4_handle_exception(server, err, &exception);
err = 0;
}
calldata->res.fattr = &calldata->fattr;
calldata->res.seqid = calldata->arg.seqid;
calldata->res.server = server;
- calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
path_get(path);
calldata->path = *path;
return status;
}
-static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
-{
- struct file *filp;
- int ret;
-
- /* If the open_intent is for execute, we have an extra check to make */
- if (fmode & FMODE_EXEC) {
- ret = nfs_may_open(state->inode,
- state->owner->so_cred,
- nd->intent.open.flags);
- if (ret < 0)
- goto out_close;
- }
- filp = lookup_instantiate_filp(nd, path->dentry, NULL);
- if (!IS_ERR(filp)) {
- struct nfs_open_context *ctx;
- ctx = nfs_file_open_context(filp);
- ctx->state = state;
- return 0;
- }
- ret = PTR_ERR(filp);
-out_close:
- nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
- return ret;
-}
-
-struct dentry *
-nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
+static struct inode *
+nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
{
- struct path path = {
- .mnt = nd->path.mnt,
- .dentry = dentry,
- };
- struct dentry *parent;
- struct iattr attr;
- struct rpc_cred *cred;
struct nfs4_state *state;
- struct dentry *res;
- int open_flags = nd->intent.open.flags;
- fmode_t fmode = open_flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
-
- if (nd->flags & LOOKUP_CREATE) {
- attr.ia_mode = nd->intent.open.create_mode;
- attr.ia_valid = ATTR_MODE;
- if (!IS_POSIXACL(dir))
- attr.ia_mode &= ~current_umask();
- } else {
- open_flags &= ~O_EXCL;
- attr.ia_valid = 0;
- BUG_ON(open_flags & O_CREAT);
- }
- cred = rpc_lookup_cred();
- if (IS_ERR(cred))
- return (struct dentry *)cred;
- parent = dentry->d_parent;
/* Protect against concurrent sillydeletes */
- nfs_block_sillyrename(parent);
- state = nfs4_do_open(dir, &path, fmode, open_flags, &attr, cred);
- put_rpccred(cred);
- if (IS_ERR(state)) {
- if (PTR_ERR(state) == -ENOENT) {
- d_add(dentry, NULL);
- nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
- }
- nfs_unblock_sillyrename(parent);
- return (struct dentry *)state;
- }
- res = d_add_unique(dentry, igrab(state->inode));
- if (res != NULL)
- path.dentry = res;
- nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
- nfs_unblock_sillyrename(parent);
- nfs4_intent_set_file(nd, &path, state, fmode);
- return res;
-}
-
-int
-nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
-{
- struct path path = {
- .mnt = nd->path.mnt,
- .dentry = dentry,
- };
- struct rpc_cred *cred;
- struct nfs4_state *state;
- fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
-
- cred = rpc_lookup_cred();
- if (IS_ERR(cred))
- return PTR_ERR(cred);
- state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
- put_rpccred(cred);
- if (IS_ERR(state)) {
- switch (PTR_ERR(state)) {
- case -EPERM:
- case -EACCES:
- case -EDQUOT:
- case -ENOSPC:
- case -EROFS:
- return PTR_ERR(state);
- default:
- goto out_drop;
- }
- }
- if (state->inode == dentry->d_inode) {
- nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
- nfs4_intent_set_file(nd, &path, state, fmode);
- return 1;
- }
- nfs4_close_sync(&path, state, fmode);
-out_drop:
- d_drop(dentry);
- return 0;
+ state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
+ if (IS_ERR(state))
+ return ERR_CAST(state);
+ ctx->state = state;
+ return igrab(state->inode);
}
static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
static int
nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
- int flags, struct nameidata *nd)
+ int flags, struct nfs_open_context *ctx)
{
- struct path path = {
- .mnt = nd->path.mnt,
+ struct path my_path = {
.dentry = dentry,
};
+ struct path *path = &my_path;
struct nfs4_state *state;
- struct rpc_cred *cred;
- fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
+ struct rpc_cred *cred = NULL;
+ fmode_t fmode = 0;
int status = 0;
- cred = rpc_lookup_cred();
- if (IS_ERR(cred)) {
- status = PTR_ERR(cred);
- goto out;
+ if (ctx != NULL) {
+ cred = ctx->cred;
+ path = &ctx->path;
+ fmode = ctx->mode;
}
- state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
+ state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
d_drop(dentry);
if (IS_ERR(state)) {
status = PTR_ERR(state);
- goto out_putcred;
+ goto out;
}
d_add(dentry, igrab(state->inode));
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
- if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
- status = nfs4_intent_set_file(nd, &path, state, fmode);
+ if (ctx != NULL)
+ ctx->state = state;
else
- nfs4_close_sync(&path, state, fmode);
-out_putcred:
- put_rpccred(cred);
+ nfs4_close_sync(path, state, fmode);
out:
return status;
}
args->bitmask = server->cache_consistency_bitmask;
res->server = server;
+ res->seq_res.sr_slot = NULL;
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
}
return 1;
}
+static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
+{
+ struct nfs_server *server = NFS_SERVER(dir);
+ struct nfs_renameargs *arg = msg->rpc_argp;
+ struct nfs_renameres *res = msg->rpc_resp;
+
+ msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
+ arg->bitmask = server->attr_bitmask;
+ res->server = server;
+}
+
+static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
+ struct inode *new_dir)
+{
+ struct nfs_renameres *res = task->tk_msg.rpc_resp;
+
+ if (!nfs4_sequence_done(task, &res->seq_res))
+ return 0;
+ if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
+ return 0;
+
+ update_changeattr(old_dir, &res->old_cinfo);
+ nfs_post_op_update_inode(old_dir, res->old_fattr);
+ update_changeattr(new_dir, &res->new_cinfo);
+ nfs_post_op_update_inode(new_dir, res->new_fattr);
+ return 1;
+}
+
static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
struct inode *new_dir, struct qstr *new_name)
{
struct nfs_server *server = NFS_SERVER(old_dir);
- struct nfs4_rename_arg arg = {
+ struct nfs_renameargs arg = {
.old_dir = NFS_FH(old_dir),
.new_dir = NFS_FH(new_dir),
.old_name = old_name,
.new_name = new_name,
.bitmask = server->attr_bitmask,
};
- struct nfs4_rename_res res = {
+ struct nfs_renameres res = {
.server = server,
};
struct rpc_message msg = {
}
static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
- u64 cookie, struct page *page, unsigned int count, int plus)
+ u64 cookie, struct page **pages, unsigned int count, int plus)
{
struct inode *dir = dentry->d_inode;
struct nfs4_readdir_arg args = {
.fh = NFS_FH(dir),
- .pages = &page,
+ .pages = pages,
.pgbase = 0,
.count = count,
.bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
+ .plus = plus,
};
struct nfs4_readdir_res res;
struct rpc_message msg = {
}
static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
- u64 cookie, struct page *page, unsigned int count, int plus)
+ u64 cookie, struct page **pages, unsigned int count, int plus)
{
struct nfs4_exception exception = { };
int err;
do {
err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
_nfs4_proc_readdir(dentry, cred, cookie,
- page, count, plus),
+ pages, count, plus),
&exception);
} while (exception.retry);
return err;
nfs4_state_mark_reclaim_nograce(clp, state);
goto do_state_recovery;
case -NFS4ERR_STALE_STATEID:
- if (state == NULL)
- break;
- nfs4_state_mark_reclaim_reboot(clp, state);
case -NFS4ERR_STALE_CLIENTID:
case -NFS4ERR_EXPIRED:
goto do_state_recovery;
case -NFS4ERR_RESOURCE:
/* The IBM lawyers misread another document! */
case -NFS4ERR_DELAY:
- case -EKEYEXPIRED:
err = nfs4_delay(clp->cl_rpcclient, &timeout);
}
} while (err == 0);
memcpy(&data->stateid, stateid, sizeof(data->stateid));
data->res.fattr = &data->fattr;
data->res.server = server;
- data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
nfs_fattr_init(data->res.fattr);
data->timestamp = jiffies;
data->rpc_status = 0;
p->arg.fl = &p->fl;
p->arg.seqid = seqid;
p->res.seqid = seqid;
- p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
p->arg.stateid = &lsp->ls_stateid;
p->lsp = lsp;
atomic_inc(&lsp->ls_count);
p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
p->arg.lock_owner.id = lsp->ls_id.id;
p->res.lock_seqid = p->arg.lock_seqid;
- p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
p->lsp = lsp;
p->server = server;
atomic_inc(&lsp->ls_count);
if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
return 0;
err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
- if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
+ if (err != -NFS4ERR_DELAY)
break;
nfs4_handle_exception(server, err, &exception);
} while (exception.retry);
goto out;
case -NFS4ERR_GRACE:
case -NFS4ERR_DELAY:
- case -EKEYEXPIRED:
nfs4_handle_exception(server, err, &exception);
err = 0;
}
nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
err = 0;
goto out;
+ case -EKEYEXPIRED:
+ /*
+ * User RPCSEC_GSS context has expired.
+ * We cannot recover this stateid now, so
+ * skip it and allow recovery thread to
+ * proceed.
+ */
+ err = 0;
+ goto out;
case -ENOMEM:
case -NFS4ERR_DENIED:
/* kill_proc(fl->fl_pid, SIGLOST, 1); */
err = 0;
goto out;
case -NFS4ERR_DELAY:
- case -EKEYEXPIRED:
break;
}
err = nfs4_handle_exception(server, err, &exception);
switch (task->tk_status) {
case -NFS4ERR_DELAY:
case -NFS4ERR_GRACE:
- case -EKEYEXPIRED:
dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
rpc_delay(task, NFS4_POLL_RETRY_MIN);
task->tk_status = 0;
};
int status;
- res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
dprintk("--> %s\n", __func__);
task = rpc_run_task(&task_setup);
{
switch(task->tk_status) {
case -NFS4ERR_DELAY:
- case -EKEYEXPIRED:
rpc_delay(task, NFS4_POLL_RETRY_MAX);
return -EAGAIN;
default:
if (!atomic_inc_not_zero(&clp->cl_count))
return ERR_PTR(-EIO);
- calldata = kmalloc(sizeof(*calldata), GFP_NOFS);
+ calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
if (calldata == NULL) {
nfs_put_client(clp);
return ERR_PTR(-ENOMEM);
}
- calldata->res.sr_slotid = NFS4_MAX_SLOT_TABLE;
msg.rpc_argp = &calldata->args;
msg.rpc_resp = &calldata->res;
calldata->clp = clp;
case -NFS4ERR_WRONG_CRED: /* What to do here? */
break;
case -NFS4ERR_DELAY:
- case -EKEYEXPIRED:
rpc_delay(task, NFS4_POLL_RETRY_MAX);
return -EAGAIN;
default:
goto out;
calldata->clp = clp;
calldata->arg.one_fs = 0;
- calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
msg.rpc_argp = &calldata->arg;
msg.rpc_resp = &calldata->res;
.unlink_setup = nfs4_proc_unlink_setup,
.unlink_done = nfs4_proc_unlink_done,
.rename = nfs4_proc_rename,
+ .rename_setup = nfs4_proc_rename_setup,
+ .rename_done = nfs4_proc_rename_done,
.link = nfs4_proc_link,
.symlink = nfs4_proc_symlink,
.mkdir = nfs4_proc_mkdir,
.lock = nfs4_proc_lock,
.clear_acl_cache = nfs4_zap_acl_attr,
.close_context = nfs4_close_context,
+ .open_context = nfs4_atomic_open,
};
/*
#include <linux/kthread.h>
#include <linux/module.h>
#include <linux/random.h>
+#include <linux/ratelimit.h>
#include <linux/workqueue.h>
#include <linux/bitops.h>
/* Mark the file as being 'closed' */
state->state = 0;
break;
+ case -EKEYEXPIRED:
+ /*
+ * User RPCSEC_GSS context has expired.
+ * We cannot recover this stateid now, so
+ * skip it and allow recovery thread to
+ * proceed.
+ */
+ break;
case -NFS4ERR_ADMIN_REVOKED:
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_BAD_STATEID:
(void)ops->reclaim_complete(clp);
}
-static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp)
+static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp)
{
struct nfs4_state_owner *sp;
struct rb_node *pos;
struct nfs4_state *state;
if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state))
- return;
-
- nfs4_reclaim_complete(clp, clp->cl_mvops->reboot_recovery_ops);
+ return 0;
for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) {
sp = rb_entry(pos, struct nfs4_state_owner, so_client_node);
}
nfs_delegation_reap_unclaimed(clp);
+ return 1;
+}
+
+static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp)
+{
+ if (!nfs4_state_clear_reclaim_reboot(clp))
+ return;
+ nfs4_reclaim_complete(clp, clp->cl_mvops->reboot_recovery_ops);
}
static void nfs_delegation_clear_all(struct nfs_client *clp)
nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce);
}
+static void nfs4_warn_keyexpired(const char *s)
+{
+ printk_ratelimited(KERN_WARNING "Error: state manager"
+ " encountered RPCSEC_GSS session"
+ " expired against NFSv4 server %s.\n",
+ s);
+}
+
static int nfs4_recovery_handle_error(struct nfs_client *clp, int error)
{
switch (error) {
case -NFS4ERR_STALE_CLIENTID:
case -NFS4ERR_LEASE_MOVED:
set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
- nfs4_state_end_reclaim_reboot(clp);
+ nfs4_state_clear_reclaim_reboot(clp);
nfs4_state_start_reclaim_reboot(clp);
break;
case -NFS4ERR_EXPIRED:
set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
/* Zero session reset errors */
return 0;
+ case -EKEYEXPIRED:
+ /* Nothing we can do */
+ nfs4_warn_keyexpired(clp->cl_hostname);
+ return 0;
}
return error;
}
case -NFS4ERR_DELAY:
case -NFS4ERR_CLID_INUSE:
case -EAGAIN:
- case -EKEYEXPIRED:
break;
+ case -EKEYEXPIRED:
+ nfs4_warn_keyexpired(clp->cl_hostname);
case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery
* in nfs4_exchange_id */
default:
if (iap->ia_valid & ATTR_MODE)
len += 4;
if (iap->ia_valid & ATTR_UID) {
- owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name);
+ owner_namelen = nfs_map_uid_to_name(server->nfs_client, iap->ia_uid, owner_name, IDMAP_NAMESZ);
if (owner_namelen < 0) {
dprintk("nfs: couldn't resolve uid %d to string\n",
iap->ia_uid);
len += 4 + (XDR_QUADLEN(owner_namelen) << 2);
}
if (iap->ia_valid & ATTR_GID) {
- owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group);
+ owner_grouplen = nfs_map_gid_to_group(server->nfs_client, iap->ia_gid, owner_group, IDMAP_NAMESZ);
if (owner_grouplen < 0) {
dprintk("nfs: couldn't resolve gid %d to string\n",
iap->ia_gid);
static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
{
- uint32_t attrs[2] = {
- FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
- FATTR4_WORD1_MOUNTED_ON_FILEID,
- };
+ uint32_t attrs[2] = {0, 0};
+ uint32_t dircount = readdir->count >> 1;
__be32 *p;
+ if (readdir->plus) {
+ attrs[0] |= FATTR4_WORD0_TYPE|FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE|
+ FATTR4_WORD0_FSID|FATTR4_WORD0_FILEHANDLE;
+ attrs[1] |= FATTR4_WORD1_MODE|FATTR4_WORD1_NUMLINKS|FATTR4_WORD1_OWNER|
+ FATTR4_WORD1_OWNER_GROUP|FATTR4_WORD1_RAWDEV|
+ FATTR4_WORD1_SPACE_USED|FATTR4_WORD1_TIME_ACCESS|
+ FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
+ dircount >>= 1;
+ }
+ attrs[0] |= FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID;
+ attrs[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
+ /* Switch to mounted_on_fileid if the server supports it */
+ if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
+ attrs[0] &= ~FATTR4_WORD0_FILEID;
+ else
+ attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
+
p = reserve_space(xdr, 12+NFS4_VERIFIER_SIZE+20);
*p++ = cpu_to_be32(OP_READDIR);
p = xdr_encode_hyper(p, readdir->cookie);
p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
- *p++ = cpu_to_be32(readdir->count >> 1); /* We're not doing readdirplus */
+ *p++ = cpu_to_be32(dircount);
*p++ = cpu_to_be32(readdir->count);
*p++ = cpu_to_be32(2);
- /* Switch to mounted_on_fileid if the server supports it */
- if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
- attrs[0] &= ~FATTR4_WORD0_FILEID;
- else
- attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
+
*p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
*p = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
hdr->nops++;
/*
* Encode RENAME request
*/
-static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
+static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs_renameargs *args)
{
struct xdr_stream xdr;
struct compound_hdr hdr = {
static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
{
if (likely(bitmap[0] & FATTR4_WORD0_SUPPORTED_ATTRS)) {
- decode_attr_bitmap(xdr, bitmask);
+ int ret;
+ ret = decode_attr_bitmap(xdr, bitmask);
+ if (unlikely(ret < 0))
+ return ret;
bitmap[0] &= ~FATTR4_WORD0_SUPPORTED_ATTRS;
} else
bitmask[0] = bitmask[1] = 0;
return -EIO;
}
+static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
+{
+ __be32 *p;
+
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_RDATTR_ERROR - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
+ }
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
+static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fh *fh)
+{
+ __be32 *p;
+ int len;
+
+ if (fh != NULL)
+ memset(fh, 0, sizeof(*fh));
+
+ if (unlikely(bitmap[0] & (FATTR4_WORD0_FILEHANDLE - 1U)))
+ return -EIO;
+ if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ len = be32_to_cpup(p);
+ if (len > NFS4_FHSIZE)
+ return -EIO;
+ p = xdr_inline_decode(xdr, len);
+ if (unlikely(!p))
+ goto out_overflow;
+ if (fh != NULL) {
+ memcpy(fh->data, p, len);
+ fh->size = len;
+ }
+ bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
+ }
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
+
static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
{
__be32 *p;
return status;
}
+static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap,
+ struct timespec *time)
+{
+ int status = 0;
+
+ time->tv_sec = 0;
+ time->tv_nsec = 0;
+ if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_DELTA - 1U)))
+ return -EIO;
+ if (likely(bitmap[1] & FATTR4_WORD1_TIME_DELTA)) {
+ status = decode_attr_time(xdr, time);
+ bitmap[1] &= ~FATTR4_WORD1_TIME_DELTA;
+ }
+ dprintk("%s: time_delta=%ld %ld\n", __func__, (long)time->tv_sec,
+ (long)time->tv_nsec);
+ return status;
+}
+
static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
{
int status = 0;
return status;
}
-static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
+static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
+ struct nfs_fattr *fattr, struct nfs_fh *fh,
const struct nfs_server *server, int may_sleep)
{
- __be32 *savep;
- uint32_t attrlen,
- bitmap[2] = {0},
- type;
int status;
umode_t fmode = 0;
uint64_t fileid;
-
- status = decode_op_hdr(xdr, OP_GETATTR);
- if (status < 0)
- goto xdr_error;
-
- status = decode_attr_bitmap(xdr, bitmap);
- if (status < 0)
- goto xdr_error;
-
- status = decode_attr_length(xdr, &attrlen, &savep);
- if (status < 0)
- goto xdr_error;
-
+ uint32_t type;
status = decode_attr_type(xdr, bitmap, &type);
if (status < 0)
goto xdr_error;
fattr->valid |= status;
+ status = decode_attr_error(xdr, bitmap);
+ if (status < 0)
+ goto xdr_error;
+
+ status = decode_attr_filehandle(xdr, bitmap, fh);
+ if (status < 0)
+ goto xdr_error;
+
status = decode_attr_fileid(xdr, bitmap, &fattr->fileid);
if (status < 0)
goto xdr_error;
fattr->valid |= status;
}
+xdr_error:
+ dprintk("%s: xdr returned %d\n", __func__, -status);
+ return status;
+}
+
+static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr,
+ struct nfs_fh *fh, const struct nfs_server *server, int may_sleep)
+{
+ __be32 *savep;
+ uint32_t attrlen,
+ bitmap[2] = {0};
+ int status;
+
+ status = decode_op_hdr(xdr, OP_GETATTR);
+ if (status < 0)
+ goto xdr_error;
+
+ status = decode_attr_bitmap(xdr, bitmap);
+ if (status < 0)
+ goto xdr_error;
+
+ status = decode_attr_length(xdr, &attrlen, &savep);
+ if (status < 0)
+ goto xdr_error;
+
+ status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, server, may_sleep);
+ if (status < 0)
+ goto xdr_error;
+
status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
dprintk("%s: xdr returned %d\n", __func__, -status);
return status;
}
+static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
+ const struct nfs_server *server, int may_sleep)
+{
+ return decode_getfattr_generic(xdr, fattr, NULL, server, may_sleep);
+}
static int decode_fsinfo(struct xdr_stream *xdr, struct nfs_fsinfo *fsinfo)
{
if ((status = decode_attr_maxwrite(xdr, bitmap, &fsinfo->wtmax)) != 0)
goto xdr_error;
fsinfo->wtpref = fsinfo->wtmax;
+ status = decode_attr_time_delta(xdr, bitmap, &fsinfo->time_delta);
+ if (status != 0)
+ goto xdr_error;
status = verify_attr_len(xdr, savep, attrlen);
xdr_error:
__be32 *p;
uint32_t namelen, type;
- p = xdr_inline_decode(xdr, 32);
+ p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
if (unlikely(!p))
goto out_overflow;
- p = xdr_decode_hyper(p, &offset);
+ p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
p = xdr_decode_hyper(p, &length);
- type = be32_to_cpup(p++);
- if (fl != NULL) {
+ type = be32_to_cpup(p++); /* 4 byte read */
+ if (fl != NULL) { /* manipulate file lock */
fl->fl_start = (loff_t)offset;
fl->fl_end = fl->fl_start + (loff_t)length - 1;
if (length == ~(uint64_t)0)
fl->fl_type = F_RDLCK;
fl->fl_pid = 0;
}
- p = xdr_decode_hyper(p, &clientid);
- namelen = be32_to_cpup(p);
- p = xdr_inline_decode(xdr, namelen);
+ p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
+ namelen = be32_to_cpup(p); /* read 4 bytes */ /* have read all 32 bytes now */
+ p = xdr_inline_decode(xdr, namelen); /* variable size field */
if (likely(p))
return -NFS4ERR_DENIED;
out_overflow:
static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
{
struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
- struct page *page = *rcvbuf->pages;
struct kvec *iov = rcvbuf->head;
size_t hdrlen;
u32 recvd, pglen = rcvbuf->page_len;
- __be32 *end, *entry, *p, *kaddr;
- unsigned int nr = 0;
int status;
status = decode_op_hdr(xdr, OP_READDIR);
pglen = recvd;
xdr_read_pages(xdr, pglen);
- BUG_ON(pglen + readdir->pgbase > PAGE_CACHE_SIZE);
- kaddr = p = kmap_atomic(page, KM_USER0);
- end = p + ((pglen + readdir->pgbase) >> 2);
- entry = p;
-
- /* Make sure the packet actually has a value_follows and EOF entry */
- if ((entry + 1) > end)
- goto short_pkt;
-
- for (; *p++; nr++) {
- u32 len, attrlen, xlen;
- if (end - p < 3)
- goto short_pkt;
- dprintk("cookie = %Lu, ", *((unsigned long long *)p));
- p += 2; /* cookie */
- len = ntohl(*p++); /* filename length */
- if (len > NFS4_MAXNAMLEN) {
- dprintk("NFS: giant filename in readdir (len 0x%x)\n",
- len);
- goto err_unmap;
- }
- xlen = XDR_QUADLEN(len);
- if (end - p < xlen + 1)
- goto short_pkt;
- dprintk("filename = %*s\n", len, (char *)p);
- p += xlen;
- len = ntohl(*p++); /* bitmap length */
- if (end - p < len + 1)
- goto short_pkt;
- p += len;
- attrlen = XDR_QUADLEN(ntohl(*p++));
- if (end - p < attrlen + 2)
- goto short_pkt;
- p += attrlen; /* attributes */
- entry = p;
- }
- /*
- * Apparently some server sends responses that are a valid size, but
- * contain no entries, and have value_follows==0 and EOF==0. For
- * those, just set the EOF marker.
- */
- if (!nr && entry[1] == 0) {
- dprintk("NFS: readdir reply truncated!\n");
- entry[1] = 1;
- }
-out:
- kunmap_atomic(kaddr, KM_USER0);
+
return 0;
-short_pkt:
- /*
- * When we get a short packet there are 2 possibilities. We can
- * return an error, or fix up the response to look like a valid
- * response and return what we have so far. If there are no
- * entries and the packet was short, then return -EIO. If there
- * are valid entries in the response, return them and pretend that
- * the call was successful, but incomplete. The caller can retry the
- * readdir starting at the last cookie.
- */
- dprintk("%s: short packet at entry %d\n", __func__, nr);
- entry[0] = entry[1] = 0;
- if (nr)
- goto out;
-err_unmap:
- kunmap_atomic(kaddr, KM_USER0);
- return -errno_NFSERR_IO;
}
static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
size_t hdrlen;
u32 len, recvd;
__be32 *p;
- char *kaddr;
int status;
status = decode_op_hdr(xdr, OP_READLINK);
* and and null-terminate the text (the VFS expects
* null-termination).
*/
- kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
- kaddr[len+rcvbuf->page_base] = '\0';
- kunmap_atomic(kaddr, KM_USER0);
+ xdr_terminate_string(rcvbuf, len);
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
struct rpc_rqst *rqstp)
{
#if defined(CONFIG_NFS_V4_1)
- struct nfs4_slot *slot;
struct nfs4_sessionid id;
u32 dummy;
int status;
goto out_overflow;
/* seqid */
- slot = &res->sr_session->fc_slot_table.slots[res->sr_slotid];
dummy = be32_to_cpup(p++);
- if (dummy != slot->seq_nr) {
+ if (dummy != res->sr_slot->seq_nr) {
dprintk("%s Invalid sequence number\n", __func__);
goto out_err;
}
/* slot id */
dummy = be32_to_cpup(p++);
- if (dummy != res->sr_slotid) {
+ if (dummy != res->sr_slot - res->sr_session->fc_slot_table.slots) {
dprintk("%s Invalid slot id\n", __func__);
goto out_err;
}
/*
* Decode RENAME response
*/
-static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_rename_res *res)
+static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs_renameres *res)
{
struct xdr_stream xdr;
struct compound_hdr hdr;
}
#endif /* CONFIG_NFS_V4_1 */
-__be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
+__be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
+ struct nfs_server *server, int plus)
{
uint32_t bitmap[2] = {0};
uint32_t len;
-
- if (!*p++) {
- if (!*p)
+ __be32 *p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ if (!ntohl(*p++)) {
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ if (!ntohl(*p++))
return ERR_PTR(-EAGAIN);
entry->eof = 1;
return ERR_PTR(-EBADCOOKIE);
}
+ p = xdr_inline_decode(xdr, 12);
+ if (unlikely(!p))
+ goto out_overflow;
entry->prev_cookie = entry->cookie;
p = xdr_decode_hyper(p, &entry->cookie);
entry->len = ntohl(*p++);
+
+ p = xdr_inline_decode(xdr, entry->len);
+ if (unlikely(!p))
+ goto out_overflow;
entry->name = (const char *) p;
- p += XDR_QUADLEN(entry->len);
/*
* In case the server doesn't return an inode number,
* since glibc seems to choke on it...)
*/
entry->ino = 1;
+ entry->fattr->valid = 0;
- len = ntohl(*p++); /* bitmap length */
- if (len-- > 0) {
- bitmap[0] = ntohl(*p++);
- if (len-- > 0) {
- bitmap[1] = ntohl(*p++);
- p += len;
- }
- }
- len = XDR_QUADLEN(ntohl(*p++)); /* attribute buffer length */
- if (len > 0) {
- if (bitmap[0] & FATTR4_WORD0_RDATTR_ERROR) {
- bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
- /* Ignore the return value of rdattr_error for now */
- p++;
- len--;
- }
- if (bitmap[0] == 0 && bitmap[1] == FATTR4_WORD1_MOUNTED_ON_FILEID)
- xdr_decode_hyper(p, &entry->ino);
- else if (bitmap[0] == FATTR4_WORD0_FILEID)
- xdr_decode_hyper(p, &entry->ino);
- p += len;
- }
+ if (decode_attr_bitmap(xdr, bitmap) < 0)
+ goto out_overflow;
+
+ if (decode_attr_length(xdr, &len, &p) < 0)
+ goto out_overflow;
+
+ if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh, server, 1) < 0)
+ goto out_overflow;
+ if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
+ entry->ino = entry->fattr->fileid;
+
+ if (verify_attr_len(xdr, p, len) < 0)
+ goto out_overflow;
+
+ p = xdr_inline_peek(xdr, 8);
+ if (p != NULL)
+ entry->eof = !p[0] && p[1];
+ else
+ entry->eof = 0;
- entry->eof = !p[0] && p[1];
return p;
+
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return ERR_PTR(-EIO);
}
/*
*
* Allow an NFS filesystem to be mounted as root. The way this works is:
* (1) Use the IP autoconfig mechanism to set local IP addresses and routes.
- * (2) Handle RPC negotiation with the system which replied to RARP or
- * was reported as a boot server by BOOTP or manually.
- * (3) The actual mounting is done later, when init() is running.
+ * (2) Construct the device string and the options string using DHCP
+ * option 17 and/or kernel command line options.
+ * (3) When mount_root() sets up the root file system, pass these strings
+ * to the NFS client's regular mount interface via sys_mount().
*
*
* Changes:
* Hua Qin : Support for mounting root file system via
* NFS over TCP.
* Fabian Frederick: Option parser rebuilt (using parser lib)
-*/
+ * Chuck Lever : Use super.c's text-based mount option parsing
+ * Chuck Lever : Add "nfsrootdebug".
+ */
#include <linux/types.h>
#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/time.h>
-#include <linux/fs.h>
#include <linux/init.h>
-#include <linux/sunrpc/clnt.h>
-#include <linux/sunrpc/xprtsock.h>
#include <linux/nfs.h>
#include <linux/nfs_fs.h>
-#include <linux/nfs_mount.h>
-#include <linux/in.h>
-#include <linux/major.h>
#include <linux/utsname.h>
-#include <linux/inet.h>
#include <linux/root_dev.h>
#include <net/ipconfig.h>
-#include <linux/parser.h>
#include "internal.h"
-/* Define this to allow debugging output */
-#undef NFSROOT_DEBUG
#define NFSDBG_FACILITY NFSDBG_ROOT
-/* Default port to use if server is not running a portmapper */
-#define NFS_MNT_PORT 627
-
/* Default path we try to mount. "%s" gets replaced by our IP address */
#define NFS_ROOT "/tftpboot/%s"
/* Parameters passed from the kernel command line */
-static char nfs_root_name[256] __initdata = "";
+static char nfs_root_parms[256] __initdata = "";
+
+/* Text-based mount options passed to super.c */
+static char nfs_root_options[256] __initdata = "";
/* Address of NFS server */
-static __be32 servaddr __initdata = 0;
+static __be32 servaddr __initdata = htonl(INADDR_NONE);
/* Name of directory to mount */
-static char nfs_export_path[NFS_MAXPATHLEN + 1] __initdata = { 0, };
-
-/* NFS-related data */
-static struct nfs_mount_data nfs_data __initdata = { 0, };/* NFS mount info */
-static int nfs_port __initdata = 0; /* Port to connect to for NFS */
-static int mount_port __initdata = 0; /* Mount daemon port number */
-
-
-/***************************************************************************
-
- Parsing of options
-
- ***************************************************************************/
-
-enum {
- /* Options that take integer arguments */
- Opt_port, Opt_rsize, Opt_wsize, Opt_timeo, Opt_retrans, Opt_acregmin,
- Opt_acregmax, Opt_acdirmin, Opt_acdirmax,
- /* Options that take no arguments */
- Opt_soft, Opt_hard, Opt_intr,
- Opt_nointr, Opt_posix, Opt_noposix, Opt_cto, Opt_nocto, Opt_ac,
- Opt_noac, Opt_lock, Opt_nolock, Opt_v2, Opt_v3, Opt_udp, Opt_tcp,
- Opt_acl, Opt_noacl,
- /* Error token */
- Opt_err
-};
-
-static const match_table_t tokens __initconst = {
- {Opt_port, "port=%u"},
- {Opt_rsize, "rsize=%u"},
- {Opt_wsize, "wsize=%u"},
- {Opt_timeo, "timeo=%u"},
- {Opt_retrans, "retrans=%u"},
- {Opt_acregmin, "acregmin=%u"},
- {Opt_acregmax, "acregmax=%u"},
- {Opt_acdirmin, "acdirmin=%u"},
- {Opt_acdirmax, "acdirmax=%u"},
- {Opt_soft, "soft"},
- {Opt_hard, "hard"},
- {Opt_intr, "intr"},
- {Opt_nointr, "nointr"},
- {Opt_posix, "posix"},
- {Opt_noposix, "noposix"},
- {Opt_cto, "cto"},
- {Opt_nocto, "nocto"},
- {Opt_ac, "ac"},
- {Opt_noac, "noac"},
- {Opt_lock, "lock"},
- {Opt_nolock, "nolock"},
- {Opt_v2, "nfsvers=2"},
- {Opt_v2, "v2"},
- {Opt_v3, "nfsvers=3"},
- {Opt_v3, "v3"},
- {Opt_udp, "proto=udp"},
- {Opt_udp, "udp"},
- {Opt_tcp, "proto=tcp"},
- {Opt_tcp, "tcp"},
- {Opt_acl, "acl"},
- {Opt_noacl, "noacl"},
- {Opt_err, NULL}
-
-};
+static char nfs_export_path[NFS_MAXPATHLEN + 1] __initdata = "";
+
+/* server:export path string passed to super.c */
+static char nfs_root_device[NFS_MAXPATHLEN + 1] __initdata = "";
/*
- * Parse option string.
+ * When the "nfsrootdebug" kernel command line option is specified,
+ * enable debugging messages for NFSROOT.
*/
-
-static int __init root_nfs_parse(char *name, char *buf)
+static int __init nfs_root_debug(char *__unused)
{
-
- char *p;
- substring_t args[MAX_OPT_ARGS];
- int option;
-
- if (!name)
- return 1;
-
- /* Set the NFS remote path */
- p = strsep(&name, ",");
- if (p[0] != '\0' && strcmp(p, "default") != 0)
- strlcpy(buf, p, NFS_MAXPATHLEN);
-
- while ((p = strsep (&name, ",")) != NULL) {
- int token;
- if (!*p)
- continue;
- token = match_token(p, tokens, args);
-
- /* %u tokens only. Beware if you add new tokens! */
- if (token < Opt_soft && match_int(&args[0], &option))
- return 0;
- switch (token) {
- case Opt_port:
- nfs_port = option;
- break;
- case Opt_rsize:
- nfs_data.rsize = option;
- break;
- case Opt_wsize:
- nfs_data.wsize = option;
- break;
- case Opt_timeo:
- nfs_data.timeo = option;
- break;
- case Opt_retrans:
- nfs_data.retrans = option;
- break;
- case Opt_acregmin:
- nfs_data.acregmin = option;
- break;
- case Opt_acregmax:
- nfs_data.acregmax = option;
- break;
- case Opt_acdirmin:
- nfs_data.acdirmin = option;
- break;
- case Opt_acdirmax:
- nfs_data.acdirmax = option;
- break;
- case Opt_soft:
- nfs_data.flags |= NFS_MOUNT_SOFT;
- break;
- case Opt_hard:
- nfs_data.flags &= ~NFS_MOUNT_SOFT;
- break;
- case Opt_intr:
- case Opt_nointr:
- break;
- case Opt_posix:
- nfs_data.flags |= NFS_MOUNT_POSIX;
- break;
- case Opt_noposix:
- nfs_data.flags &= ~NFS_MOUNT_POSIX;
- break;
- case Opt_cto:
- nfs_data.flags &= ~NFS_MOUNT_NOCTO;
- break;
- case Opt_nocto:
- nfs_data.flags |= NFS_MOUNT_NOCTO;
- break;
- case Opt_ac:
- nfs_data.flags &= ~NFS_MOUNT_NOAC;
- break;
- case Opt_noac:
- nfs_data.flags |= NFS_MOUNT_NOAC;
- break;
- case Opt_lock:
- nfs_data.flags &= ~NFS_MOUNT_NONLM;
- break;
- case Opt_nolock:
- nfs_data.flags |= NFS_MOUNT_NONLM;
- break;
- case Opt_v2:
- nfs_data.flags &= ~NFS_MOUNT_VER3;
- break;
- case Opt_v3:
- nfs_data.flags |= NFS_MOUNT_VER3;
- break;
- case Opt_udp:
- nfs_data.flags &= ~NFS_MOUNT_TCP;
- break;
- case Opt_tcp:
- nfs_data.flags |= NFS_MOUNT_TCP;
- break;
- case Opt_acl:
- nfs_data.flags &= ~NFS_MOUNT_NOACL;
- break;
- case Opt_noacl:
- nfs_data.flags |= NFS_MOUNT_NOACL;
- break;
- default:
- printk(KERN_WARNING "Root-NFS: unknown "
- "option: %s\n", p);
- return 0;
- }
- }
-
+ nfs_debug |= NFSDBG_ROOT | NFSDBG_MOUNT;
return 1;
}
+__setup("nfsrootdebug", nfs_root_debug);
+
/*
- * Prepare the NFS data structure and parse all options.
+ * Parse NFS server and directory information passed on the kernel
+ * command line.
+ *
+ * nfsroot=[<server-ip>:]<root-dir>[,<nfs-options>]
+ *
+ * If there is a "%s" token in the <root-dir> string, it is replaced
+ * by the ASCII-representation of the client's IP address.
*/
-static int __init root_nfs_name(char *name)
+static int __init nfs_root_setup(char *line)
{
- static char buf[NFS_MAXPATHLEN] __initdata;
- char *cp;
-
- /* Set some default values */
- memset(&nfs_data, 0, sizeof(nfs_data));
- nfs_port = -1;
- nfs_data.version = NFS_MOUNT_VERSION;
- nfs_data.flags = NFS_MOUNT_NONLM; /* No lockd in nfs root yet */
- nfs_data.rsize = NFS_DEF_FILE_IO_SIZE;
- nfs_data.wsize = NFS_DEF_FILE_IO_SIZE;
- nfs_data.acregmin = NFS_DEF_ACREGMIN;
- nfs_data.acregmax = NFS_DEF_ACREGMAX;
- nfs_data.acdirmin = NFS_DEF_ACDIRMIN;
- nfs_data.acdirmax = NFS_DEF_ACDIRMAX;
- strcpy(buf, NFS_ROOT);
-
- /* Process options received from the remote server */
- root_nfs_parse(root_server_path, buf);
-
- /* Override them by options set on kernel command-line */
- root_nfs_parse(name, buf);
-
- cp = utsname()->nodename;
- if (strlen(buf) + strlen(cp) > NFS_MAXPATHLEN) {
- printk(KERN_ERR "Root-NFS: Pathname for remote directory too long.\n");
- return -1;
+ ROOT_DEV = Root_NFS;
+
+ if (line[0] == '/' || line[0] == ',' || (line[0] >= '0' && line[0] <= '9')) {
+ strlcpy(nfs_root_parms, line, sizeof(nfs_root_parms));
+ } else {
+ size_t n = strlen(line) + sizeof(NFS_ROOT) - 1;
+ if (n >= sizeof(nfs_root_parms))
+ line[sizeof(nfs_root_parms) - sizeof(NFS_ROOT) - 2] = '\0';
+ sprintf(nfs_root_parms, NFS_ROOT, line);
}
- sprintf(nfs_export_path, buf, cp);
+
+ /*
+ * Extract the IP address of the NFS server containing our
+ * root file system, if one was specified.
+ *
+ * Note: root_nfs_parse_addr() removes the server-ip from
+ * nfs_root_parms, if it exists.
+ */
+ root_server_addr = root_nfs_parse_addr(nfs_root_parms);
return 1;
}
+__setup("nfsroot=", nfs_root_setup);
-/*
- * Get NFS server address.
- */
-static int __init root_nfs_addr(void)
+static int __init root_nfs_copy(char *dest, const char *src,
+ const size_t destlen)
{
- if ((servaddr = root_server_addr) == htonl(INADDR_NONE)) {
- printk(KERN_ERR "Root-NFS: No NFS server available, giving up.\n");
+ if (strlcpy(dest, src, destlen) > destlen)
return -1;
- }
+ return 0;
+}
- snprintf(nfs_data.hostname, sizeof(nfs_data.hostname),
- "%pI4", &servaddr);
+static int __init root_nfs_cat(char *dest, const char *src,
+ const size_t destlen)
+{
+ if (strlcat(dest, src, destlen) > destlen)
+ return -1;
return 0;
}
/*
- * Tell the user what's going on.
+ * Parse out root export path and mount options from
+ * passed-in string @incoming.
+ *
+ * Copy the export path into @exppath.
*/
-#ifdef NFSROOT_DEBUG
-static void __init root_nfs_print(void)
+static int __init root_nfs_parse_options(char *incoming, char *exppath,
+ const size_t exppathlen)
{
- printk(KERN_NOTICE "Root-NFS: Mounting %s on server %s as root\n",
- nfs_export_path, nfs_data.hostname);
- printk(KERN_NOTICE "Root-NFS: rsize = %d, wsize = %d, timeo = %d, retrans = %d\n",
- nfs_data.rsize, nfs_data.wsize, nfs_data.timeo, nfs_data.retrans);
- printk(KERN_NOTICE "Root-NFS: acreg (min,max) = (%d,%d), acdir (min,max) = (%d,%d)\n",
- nfs_data.acregmin, nfs_data.acregmax,
- nfs_data.acdirmin, nfs_data.acdirmax);
- printk(KERN_NOTICE "Root-NFS: nfsd port = %d, mountd port = %d, flags = %08x\n",
- nfs_port, mount_port, nfs_data.flags);
-}
-#endif
-
+ char *p;
-static int __init root_nfs_init(void)
-{
-#ifdef NFSROOT_DEBUG
- nfs_debug |= NFSDBG_ROOT;
-#endif
+ /*
+ * Set the NFS remote path
+ */
+ p = strsep(&incoming, ",");
+ if (*p != '\0' && strcmp(p, "default") != 0)
+ if (root_nfs_copy(exppath, p, exppathlen))
+ return -1;
/*
- * Decode the root directory path name and NFS options from
- * the kernel command line. This has to go here in order to
- * be able to use the client IP address for the remote root
- * directory (necessary for pure RARP booting).
+ * @incoming now points to the rest of the string; if it
+ * contains something, append it to our root options buffer
*/
- if (root_nfs_name(nfs_root_name) < 0 ||
- root_nfs_addr() < 0)
- return -1;
+ if (incoming != NULL && *incoming != '\0')
+ if (root_nfs_cat(nfs_root_options, incoming,
+ sizeof(nfs_root_options)))
+ return -1;
-#ifdef NFSROOT_DEBUG
- root_nfs_print();
-#endif
+ /*
+ * Possibly prepare for more options to be appended
+ */
+ if (nfs_root_options[0] != '\0' &&
+ nfs_root_options[strlen(nfs_root_options)] != ',')
+ if (root_nfs_cat(nfs_root_options, ",",
+ sizeof(nfs_root_options)))
+ return -1;
return 0;
}
-
/*
- * Parse NFS server and directory information passed on the kernel
- * command line.
+ * Decode the export directory path name and NFS options from
+ * the kernel command line. This has to be done late in order to
+ * use a dynamically acquired client IP address for the remote
+ * root directory path.
+ *
+ * Returns zero if successful; otherwise -1 is returned.
*/
-static int __init nfs_root_setup(char *line)
+static int __init root_nfs_data(char *cmdline)
{
- ROOT_DEV = Root_NFS;
- if (line[0] == '/' || line[0] == ',' || (line[0] >= '0' && line[0] <= '9')) {
- strlcpy(nfs_root_name, line, sizeof(nfs_root_name));
- } else {
- int n = strlen(line) + sizeof(NFS_ROOT) - 1;
- if (n >= sizeof(nfs_root_name))
- line[sizeof(nfs_root_name) - sizeof(NFS_ROOT) - 2] = '\0';
- sprintf(nfs_root_name, NFS_ROOT, line);
+ char addr_option[sizeof("nolock,addr=") + INET_ADDRSTRLEN + 1];
+ int len, retval = -1;
+ char *tmp = NULL;
+ const size_t tmplen = sizeof(nfs_export_path);
+
+ tmp = kzalloc(tmplen, GFP_KERNEL);
+ if (tmp == NULL)
+ goto out_nomem;
+ strcpy(tmp, NFS_ROOT);
+
+ if (root_server_path[0] != '\0') {
+ dprintk("Root-NFS: DHCPv4 option 17: %s\n",
+ root_server_path);
+ if (root_nfs_parse_options(root_server_path, tmp, tmplen))
+ goto out_optionstoolong;
}
- root_server_addr = root_nfs_parse_addr(nfs_root_name);
- return 1;
-}
-__setup("nfsroot=", nfs_root_setup);
-
-/***************************************************************************
-
- Routines to actually mount the root directory
+ if (cmdline[0] != '\0') {
+ dprintk("Root-NFS: nfsroot=%s\n", cmdline);
+ if (root_nfs_parse_options(cmdline, tmp, tmplen))
+ goto out_optionstoolong;
+ }
- ***************************************************************************/
+ /*
+ * Append mandatory options for nfsroot so they override
+ * what has come before
+ */
+ snprintf(addr_option, sizeof(addr_option), "nolock,addr=%pI4",
+ &servaddr);
+ if (root_nfs_cat(nfs_root_options, addr_option,
+ sizeof(nfs_root_options)))
+ goto out_optionstoolong;
-/*
- * Construct sockaddr_in from address and port number.
- */
-static inline void
-set_sockaddr(struct sockaddr_in *sin, __be32 addr, __be16 port)
-{
- sin->sin_family = AF_INET;
- sin->sin_addr.s_addr = addr;
- sin->sin_port = port;
-}
+ /*
+ * Set up nfs_root_device. For NFS mounts, this looks like
+ *
+ * server:/path
+ *
+ * At this point, utsname()->nodename contains our local
+ * IP address or hostname, set by ipconfig. If "%s" exists
+ * in tmp, substitute the nodename, then shovel the whole
+ * mess into nfs_root_device.
+ */
+ len = snprintf(nfs_export_path, sizeof(nfs_export_path),
+ tmp, utsname()->nodename);
+ if (len > (int)sizeof(nfs_export_path))
+ goto out_devnametoolong;
+ len = snprintf(nfs_root_device, sizeof(nfs_root_device),
+ "%pI4:%s", &servaddr, nfs_export_path);
+ if (len > (int)sizeof(nfs_root_device))
+ goto out_devnametoolong;
-/*
- * Query server portmapper for the port of a daemon program.
- */
-static int __init root_nfs_getport(int program, int version, int proto)
-{
- struct sockaddr_in sin;
+ retval = 0;
- printk(KERN_NOTICE "Looking up port of RPC %d/%d on %pI4\n",
- program, version, &servaddr);
- set_sockaddr(&sin, servaddr, 0);
- return rpcb_getport_sync(&sin, program, version, proto);
+out:
+ kfree(tmp);
+ return retval;
+out_nomem:
+ printk(KERN_ERR "Root-NFS: could not allocate memory\n");
+ goto out;
+out_optionstoolong:
+ printk(KERN_ERR "Root-NFS: mount options string too long\n");
+ goto out;
+out_devnametoolong:
+ printk(KERN_ERR "Root-NFS: root device name too long.\n");
+ goto out;
}
-
-/*
- * Use portmapper to find mountd and nfsd port numbers if not overriden
- * by the user. Use defaults if portmapper is not available.
- * XXX: Is there any nfs server with no portmapper?
+/**
+ * nfs_root_data - Return prepared 'data' for NFSROOT mount
+ * @root_device: OUT: address of string containing NFSROOT device
+ * @root_data: OUT: address of string containing NFSROOT mount options
+ *
+ * Returns zero and sets @root_device and @root_data if successful,
+ * otherwise -1 is returned.
*/
-static int __init root_nfs_ports(void)
+int __init nfs_root_data(char **root_device, char **root_data)
{
- int port;
- int nfsd_ver, mountd_ver;
- int nfsd_port, mountd_port;
- int proto;
-
- if (nfs_data.flags & NFS_MOUNT_VER3) {
- nfsd_ver = NFS3_VERSION;
- mountd_ver = NFS_MNT3_VERSION;
- nfsd_port = NFS_PORT;
- mountd_port = NFS_MNT_PORT;
- } else {
- nfsd_ver = NFS2_VERSION;
- mountd_ver = NFS_MNT_VERSION;
- nfsd_port = NFS_PORT;
- mountd_port = NFS_MNT_PORT;
- }
-
- proto = (nfs_data.flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP;
-
- if (nfs_port < 0) {
- if ((port = root_nfs_getport(NFS_PROGRAM, nfsd_ver, proto)) < 0) {
- printk(KERN_ERR "Root-NFS: Unable to get nfsd port "
- "number from server, using default\n");
- port = nfsd_port;
- }
- nfs_port = port;
- dprintk("Root-NFS: Portmapper on server returned %d "
- "as nfsd port\n", port);
+ servaddr = root_server_addr;
+ if (servaddr == htonl(INADDR_NONE)) {
+ printk(KERN_ERR "Root-NFS: no NFS server address\n");
+ return -1;
}
- if ((port = root_nfs_getport(NFS_MNT_PROGRAM, mountd_ver, proto)) < 0) {
- printk(KERN_ERR "Root-NFS: Unable to get mountd port "
- "number from server, using default\n");
- port = mountd_port;
- }
- mount_port = port;
- dprintk("Root-NFS: mountd port is %d\n", port);
+ if (root_nfs_data(nfs_root_parms) < 0)
+ return -1;
+ *root_device = nfs_root_device;
+ *root_data = nfs_root_options;
return 0;
}
-
-
-/*
- * Get a file handle from the server for the directory which is to be
- * mounted.
- */
-static int __init root_nfs_get_handle(void)
-{
- struct sockaddr_in sin;
- unsigned int auth_flav_len = 0;
- struct nfs_mount_request request = {
- .sap = (struct sockaddr *)&sin,
- .salen = sizeof(sin),
- .dirpath = nfs_export_path,
- .version = (nfs_data.flags & NFS_MOUNT_VER3) ?
- NFS_MNT3_VERSION : NFS_MNT_VERSION,
- .protocol = (nfs_data.flags & NFS_MOUNT_TCP) ?
- XPRT_TRANSPORT_TCP : XPRT_TRANSPORT_UDP,
- .auth_flav_len = &auth_flav_len,
- };
- int status = -ENOMEM;
-
- request.fh = nfs_alloc_fhandle();
- if (!request.fh)
- goto out;
- set_sockaddr(&sin, servaddr, htons(mount_port));
- status = nfs_mount(&request);
- if (status < 0)
- printk(KERN_ERR "Root-NFS: Server returned error %d "
- "while mounting %s\n", status, nfs_export_path);
- else {
- nfs_data.root.size = request.fh->size;
- memcpy(&nfs_data.root.data, request.fh->data, request.fh->size);
- }
- nfs_free_fhandle(request.fh);
-out:
- return status;
-}
-
-/*
- * Get the NFS port numbers and file handle, and return the prepared 'data'
- * argument for mount() if everything went OK. Return NULL otherwise.
- */
-void * __init nfs_root_data(void)
-{
- if (root_nfs_init() < 0
- || root_nfs_ports() < 0
- || root_nfs_get_handle() < 0)
- return NULL;
- set_sockaddr((struct sockaddr_in *) &nfs_data.addr, servaddr, htons(nfs_port));
- return (void*)&nfs_data;
-}
static int
nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
- int flags, struct nameidata *nd)
+ int flags, struct nfs_open_context *ctx)
{
struct nfs_createdata *data;
struct rpc_message msg = {
return 1;
}
+static void
+nfs_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
+{
+ msg->rpc_proc = &nfs_procedures[NFSPROC_RENAME];
+}
+
+static int
+nfs_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
+ struct inode *new_dir)
+{
+ if (nfs_async_handle_expired_key(task))
+ return 0;
+ nfs_mark_for_revalidate(old_dir);
+ nfs_mark_for_revalidate(new_dir);
+ return 1;
+}
+
static int
nfs_proc_rename(struct inode *old_dir, struct qstr *old_name,
struct inode *new_dir, struct qstr *new_name)
{
struct nfs_renameargs arg = {
- .fromfh = NFS_FH(old_dir),
- .fromname = old_name->name,
- .fromlen = old_name->len,
- .tofh = NFS_FH(new_dir),
- .toname = new_name->name,
- .tolen = new_name->len
+ .old_dir = NFS_FH(old_dir),
+ .old_name = old_name,
+ .new_dir = NFS_FH(new_dir),
+ .new_name = new_name,
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_RENAME],
*/
static int
nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
- u64 cookie, struct page *page, unsigned int count, int plus)
+ u64 cookie, struct page **pages, unsigned int count, int plus)
{
struct inode *dir = dentry->d_inode;
struct nfs_readdirargs arg = {
.fh = NFS_FH(dir),
.cookie = cookie,
.count = count,
- .pages = &page,
+ .pages = pages,
};
struct rpc_message msg = {
.rpc_proc = &nfs_procedures[NFSPROC_READDIR],
.unlink_setup = nfs_proc_unlink_setup,
.unlink_done = nfs_proc_unlink_done,
.rename = nfs_proc_rename,
+ .rename_setup = nfs_proc_rename_setup,
+ .rename_done = nfs_proc_rename_done,
.link = nfs_proc_link,
.symlink = nfs_proc_symlink,
.mkdir = nfs_proc_mkdir,
memset(p, 0, sizeof(*p));
INIT_LIST_HEAD(&p->pages);
p->npages = pagecount;
- p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
if (pagecount <= ARRAY_SIZE(p->page_array))
p->pagevec = p->page_array;
else {
Opt_addr, Opt_mountaddr, Opt_clientaddr,
Opt_lookupcache,
Opt_fscache_uniq,
+ Opt_local_lock,
/* Special mount options */
Opt_userspace, Opt_deprecated, Opt_sloppy,
{ Opt_lookupcache, "lookupcache=%s" },
{ Opt_fscache_uniq, "fsc=%s" },
+ { Opt_local_lock, "local_lock=%s" },
{ Opt_err, NULL }
};
{ Opt_lookupcache_err, NULL }
};
+enum {
+ Opt_local_lock_all, Opt_local_lock_flock, Opt_local_lock_posix,
+ Opt_local_lock_none,
+
+ Opt_local_lock_err
+};
+
+static match_table_t nfs_local_lock_tokens = {
+ { Opt_local_lock_all, "all" },
+ { Opt_local_lock_flock, "flock" },
+ { Opt_local_lock_posix, "posix" },
+ { Opt_local_lock_none, "none" },
+
+ { Opt_local_lock_err, NULL }
+};
+
static void nfs_umount_begin(struct super_block *);
static int nfs_statfs(struct dentry *, struct kstatfs *);
const struct proc_nfs_info *nfs_infop;
struct nfs_client *clp = nfss->nfs_client;
u32 version = clp->rpc_ops->version;
+ int local_flock, local_fcntl;
seq_printf(m, ",vers=%u", version);
seq_printf(m, ",rsize=%u", nfss->rsize);
else
seq_printf(m, ",lookupcache=pos");
}
+
+ local_flock = nfss->flags & NFS_MOUNT_LOCAL_FLOCK;
+ local_fcntl = nfss->flags & NFS_MOUNT_LOCAL_FCNTL;
+
+ if (!local_flock && !local_fcntl)
+ seq_printf(m, ",local_lock=none");
+ else if (local_flock && local_fcntl)
+ seq_printf(m, ",local_lock=all");
+ else if (local_flock)
+ seq_printf(m, ",local_lock=flock");
+ else
+ seq_printf(m, ",local_lock=posix");
}
/*
break;
case Opt_lock:
mnt->flags &= ~NFS_MOUNT_NONLM;
+ mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK |
+ NFS_MOUNT_LOCAL_FCNTL);
break;
case Opt_nolock:
mnt->flags |= NFS_MOUNT_NONLM;
+ mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK |
+ NFS_MOUNT_LOCAL_FCNTL);
break;
case Opt_v2:
mnt->flags &= ~NFS_MOUNT_VER3;
mnt->fscache_uniq = string;
mnt->options |= NFS_OPTION_FSCACHE;
break;
+ case Opt_local_lock:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ token = match_token(string, nfs_local_lock_tokens,
+ args);
+ kfree(string);
+ switch (token) {
+ case Opt_local_lock_all:
+ mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK |
+ NFS_MOUNT_LOCAL_FCNTL);
+ break;
+ case Opt_local_lock_flock:
+ mnt->flags |= NFS_MOUNT_LOCAL_FLOCK;
+ break;
+ case Opt_local_lock_posix:
+ mnt->flags |= NFS_MOUNT_LOCAL_FCNTL;
+ break;
+ case Opt_local_lock_none:
+ mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK |
+ NFS_MOUNT_LOCAL_FCNTL);
+ break;
+ default:
+ dfprintk(MOUNT, "NFS: invalid "
+ "local_lock argument\n");
+ return 0;
+ };
+ break;
/*
* Special options
if (!args->nfs_server.hostname)
goto out_nomem;
+ if (!(data->flags & NFS_MOUNT_NONLM))
+ args->flags &= ~(NFS_MOUNT_LOCAL_FLOCK|
+ NFS_MOUNT_LOCAL_FCNTL);
+ else
+ args->flags |= (NFS_MOUNT_LOCAL_FLOCK|
+ NFS_MOUNT_LOCAL_FCNTL);
/*
* The legacy version 6 binary mount data from userspace has a
* field used only to transport selinux information into the
static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args)
{
- args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3);
+ args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3|
+ NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL);
}
static int nfs4_validate_text_mount_data(void *options,
.extra1 = (int *)&nfs_set_port_min,
.extra2 = (int *)&nfs_set_port_max,
},
+#ifndef CONFIG_NFS_USE_NEW_IDMAPPER
{
.procname = "idmap_cache_timeout",
.data = &nfs_idmap_cache_timeout,
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
+#endif /* CONFIG_NFS_USE_NEW_IDMAPPER */
#endif
{
.procname = "nfs_mountpoint_timeout",
#include <linux/nfs_fs.h>
#include <linux/sched.h>
#include <linux/wait.h>
+#include <linux/namei.h>
#include "internal.h"
#include "nfs4_fs.h"
+#include "iostat.h"
+#include "delegation.h"
struct nfs_unlinkdata {
struct hlist_node list;
* @dir: parent directory of dentry
* @dentry: dentry to unlink
*/
-int
+static int
nfs_async_unlink(struct inode *dir, struct dentry *dentry)
{
struct nfs_unlinkdata *data;
status = PTR_ERR(data->cred);
goto out_free;
}
- data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
data->res.dir_attr = &data->dir_attr;
status = -EBUSY;
if (data != NULL && (NFS_STALE(inode) || !nfs_call_unlink(dentry, data)))
nfs_free_unlinkdata(data);
}
+
+/* Cancel a queued async unlink. Called when a sillyrename run fails. */
+static void
+nfs_cancel_async_unlink(struct dentry *dentry)
+{
+ spin_lock(&dentry->d_lock);
+ if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {
+ struct nfs_unlinkdata *data = dentry->d_fsdata;
+
+ dentry->d_flags &= ~DCACHE_NFSFS_RENAMED;
+ spin_unlock(&dentry->d_lock);
+ nfs_free_unlinkdata(data);
+ return;
+ }
+ spin_unlock(&dentry->d_lock);
+}
+
+struct nfs_renamedata {
+ struct nfs_renameargs args;
+ struct nfs_renameres res;
+ struct rpc_cred *cred;
+ struct inode *old_dir;
+ struct dentry *old_dentry;
+ struct nfs_fattr old_fattr;
+ struct inode *new_dir;
+ struct dentry *new_dentry;
+ struct nfs_fattr new_fattr;
+};
+
+/**
+ * nfs_async_rename_done - Sillyrename post-processing
+ * @task: rpc_task of the sillyrename
+ * @calldata: nfs_renamedata for the sillyrename
+ *
+ * Do the directory attribute updates and the d_move
+ */
+static void nfs_async_rename_done(struct rpc_task *task, void *calldata)
+{
+ struct nfs_renamedata *data = calldata;
+ struct inode *old_dir = data->old_dir;
+ struct inode *new_dir = data->new_dir;
+
+ if (!NFS_PROTO(old_dir)->rename_done(task, old_dir, new_dir)) {
+ nfs_restart_rpc(task, NFS_SERVER(old_dir)->nfs_client);
+ return;
+ }
+
+ if (task->tk_status != 0) {
+ nfs_cancel_async_unlink(data->old_dentry);
+ return;
+ }
+
+ nfs_set_verifier(data->old_dentry, nfs_save_change_attribute(old_dir));
+ d_move(data->old_dentry, data->new_dentry);
+}
+
+/**
+ * nfs_async_rename_release - Release the sillyrename data.
+ * @calldata: the struct nfs_renamedata to be released
+ */
+static void nfs_async_rename_release(void *calldata)
+{
+ struct nfs_renamedata *data = calldata;
+ struct super_block *sb = data->old_dir->i_sb;
+
+ if (data->old_dentry->d_inode)
+ nfs_mark_for_revalidate(data->old_dentry->d_inode);
+
+ dput(data->old_dentry);
+ dput(data->new_dentry);
+ iput(data->old_dir);
+ iput(data->new_dir);
+ nfs_sb_deactive(sb);
+ put_rpccred(data->cred);
+ kfree(data);
+}
+
+#if defined(CONFIG_NFS_V4_1)
+static void nfs_rename_prepare(struct rpc_task *task, void *calldata)
+{
+ struct nfs_renamedata *data = calldata;
+ struct nfs_server *server = NFS_SERVER(data->old_dir);
+
+ if (nfs4_setup_sequence(server, &data->args.seq_args,
+ &data->res.seq_res, 1, task))
+ return;
+ rpc_call_start(task);
+}
+#endif /* CONFIG_NFS_V4_1 */
+
+static const struct rpc_call_ops nfs_rename_ops = {
+ .rpc_call_done = nfs_async_rename_done,
+ .rpc_release = nfs_async_rename_release,
+#if defined(CONFIG_NFS_V4_1)
+ .rpc_call_prepare = nfs_rename_prepare,
+#endif /* CONFIG_NFS_V4_1 */
+};
+
+/**
+ * nfs_async_rename - perform an asynchronous rename operation
+ * @old_dir: directory that currently holds the dentry to be renamed
+ * @new_dir: target directory for the rename
+ * @old_dentry: original dentry to be renamed
+ * @new_dentry: dentry to which the old_dentry should be renamed
+ *
+ * It's expected that valid references to the dentries and inodes are held
+ */
+static struct rpc_task *
+nfs_async_rename(struct inode *old_dir, struct inode *new_dir,
+ struct dentry *old_dentry, struct dentry *new_dentry)
+{
+ struct nfs_renamedata *data;
+ struct rpc_message msg = { };
+ struct rpc_task_setup task_setup_data = {
+ .rpc_message = &msg,
+ .callback_ops = &nfs_rename_ops,
+ .workqueue = nfsiod_workqueue,
+ .rpc_client = NFS_CLIENT(old_dir),
+ .flags = RPC_TASK_ASYNC,
+ };
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (data == NULL)
+ return ERR_PTR(-ENOMEM);
+ task_setup_data.callback_data = data,
+
+ data->cred = rpc_lookup_cred();
+ if (IS_ERR(data->cred)) {
+ struct rpc_task *task = ERR_CAST(data->cred);
+ kfree(data);
+ return task;
+ }
+
+ msg.rpc_argp = &data->args;
+ msg.rpc_resp = &data->res;
+ msg.rpc_cred = data->cred;
+
+ /* set up nfs_renamedata */
+ data->old_dir = old_dir;
+ atomic_inc(&old_dir->i_count);
+ data->new_dir = new_dir;
+ atomic_inc(&new_dir->i_count);
+ data->old_dentry = dget(old_dentry);
+ data->new_dentry = dget(new_dentry);
+ nfs_fattr_init(&data->old_fattr);
+ nfs_fattr_init(&data->new_fattr);
+
+ /* set up nfs_renameargs */
+ data->args.old_dir = NFS_FH(old_dir);
+ data->args.old_name = &old_dentry->d_name;
+ data->args.new_dir = NFS_FH(new_dir);
+ data->args.new_name = &new_dentry->d_name;
+
+ /* set up nfs_renameres */
+ data->res.old_fattr = &data->old_fattr;
+ data->res.new_fattr = &data->new_fattr;
+
+ nfs_sb_active(old_dir->i_sb);
+
+ NFS_PROTO(data->old_dir)->rename_setup(&msg, old_dir);
+
+ return rpc_run_task(&task_setup_data);
+}
+
+/**
+ * nfs_sillyrename - Perform a silly-rename of a dentry
+ * @dir: inode of directory that contains dentry
+ * @dentry: dentry to be sillyrenamed
+ *
+ * NFSv2/3 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
+nfs_sillyrename(struct inode *dir, struct dentry *dentry)
+{
+ static unsigned int sillycounter;
+ const int fileidsize = sizeof(NFS_FILEID(dentry->d_inode))*2;
+ const int countersize = sizeof(sillycounter)*2;
+ const int slen = sizeof(".nfs")+fileidsize+countersize-1;
+ char silly[slen+1];
+ struct dentry *sdentry;
+ struct rpc_task *task;
+ int error = -EIO;
+
+ dfprintk(VFS, "NFS: silly-rename(%s/%s, ct=%d)\n",
+ dentry->d_parent->d_name.name, dentry->d_name.name,
+ atomic_read(&dentry->d_count));
+ nfs_inc_stats(dir, NFSIOS_SILLYRENAME);
+
+ /*
+ * We don't allow a dentry to be silly-renamed twice.
+ */
+ error = -EBUSY;
+ if (dentry->d_flags & DCACHE_NFSFS_RENAMED)
+ goto out;
+
+ sprintf(silly, ".nfs%*.*Lx",
+ fileidsize, fileidsize,
+ (unsigned long long)NFS_FILEID(dentry->d_inode));
+
+ /* Return delegation in anticipation of the rename */
+ nfs_inode_return_delegation(dentry->d_inode);
+
+ sdentry = NULL;
+ do {
+ char *suffix = silly + slen - countersize;
+
+ dput(sdentry);
+ sillycounter++;
+ sprintf(suffix, "%*.*x", countersize, countersize, sillycounter);
+
+ dfprintk(VFS, "NFS: trying to rename %s to %s\n",
+ dentry->d_name.name, silly);
+
+ 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 (sdentry->d_inode != NULL); /* need negative lookup */
+
+ /* queue unlink first. Can't do this from rpc_release as it
+ * has to allocate memory
+ */
+ error = nfs_async_unlink(dir, dentry);
+ if (error)
+ goto out_dput;
+
+ /* run the rename task, undo unlink if it fails */
+ task = nfs_async_rename(dir, dir, dentry, sdentry);
+ if (IS_ERR(task)) {
+ error = -EBUSY;
+ nfs_cancel_async_unlink(dentry);
+ goto out_dput;
+ }
+
+ /* wait for the RPC task to complete, unless a SIGKILL intervenes */
+ error = rpc_wait_for_completion_task(task);
+ if (error == 0)
+ error = task->tk_status;
+ rpc_put_task(task);
+out_dput:
+ dput(sdentry);
+out:
+ return error;
+}
if (p) {
memset(p, 0, sizeof(*p));
INIT_LIST_HEAD(&p->pages);
- p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
}
return p;
}
memset(p, 0, sizeof(*p));
INIT_LIST_HEAD(&p->pages);
p->npages = pagecount;
- p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
if (pagecount <= ARRAY_SIZE(p->page_array))
p->pagevec = p->page_array;
else {
int flags = FLUSH_SYNC;
int ret = 0;
- /* Don't commit yet if this is a non-blocking flush and there are
- * lots of outstanding writes for this mapping.
- */
- if (wbc->sync_mode == WB_SYNC_NONE &&
- nfsi->ncommit <= (nfsi->npages >> 1))
- goto out_mark_dirty;
+ if (wbc->sync_mode == WB_SYNC_NONE) {
+ /* Don't commit yet if this is a non-blocking flush and there
+ * are a lot of outstanding writes for this mapping.
+ */
+ if (nfsi->ncommit <= (nfsi->npages >> 1))
+ goto out_mark_dirty;
- if (wbc->nonblocking || wbc->for_background)
+ /* don't wait for the COMMIT response */
flags = 0;
+ }
+
ret = nfs_commit_inode(inode, flags);
if (ret >= 0) {
if (wbc->sync_mode == WB_SYNC_NONE) {
extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx);
extern void put_nfs_open_context(struct nfs_open_context *ctx);
extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode);
+extern struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred, fmode_t f_mode);
+extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx);
extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx);
extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx);
extern u64 nfs_compat_user_ino64(u64 fileid);
extern void nfs_fattr_init(struct nfs_fattr *fattr);
+extern unsigned long nfs_inc_attr_generation_counter(void);
extern struct nfs_fattr *nfs_alloc_fattr(void);
kfree(fh);
}
+/*
+ * linux/fs/nfs/nfsroot.c
+ */
+extern int nfs_root_data(char **root_device, char **root_data); /*__init*/
/* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */
extern __be32 root_nfs_parse_addr(char *name); /*__init*/
-extern unsigned long nfs_inc_attr_generation_counter(void);
/*
* linux/fs/nfs/file.c
/*
* linux/fs/nfs/unlink.c
*/
-extern int nfs_async_unlink(struct inode *dir, struct dentry *dentry);
extern void nfs_complete_unlink(struct dentry *dentry, struct inode *);
extern void nfs_block_sillyrename(struct dentry *dentry);
extern void nfs_unblock_sillyrename(struct dentry *dentry);
+extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry);
/*
* linux/fs/nfs/write.c
return ino;
}
-/* NFS root */
-
-extern void * nfs_root_data(void);
-
#define nfs_wait_event(clnt, wq, condition) \
({ \
int __retval = wait_event_killable(wq, condition); \
struct nfs_fsid fsid;
__u64 maxfilesize; /* maximum file size */
+ struct timespec time_delta; /* smallest time granularity */
unsigned long mount_time; /* when this fs was mounted */
dev_t s_dev; /* superblock dev numbers */
/* Forward declaration to make this header independent of others */
struct nfs_client;
+#ifdef CONFIG_NFS_USE_NEW_IDMAPPER
+
+int nfs_idmap_init(void);
+void nfs_idmap_quit(void);
+
+static inline int nfs_idmap_new(struct nfs_client *clp)
+{
+ return 0;
+}
+
+static inline void nfs_idmap_delete(struct nfs_client *clp)
+{
+}
+
+#else /* CONFIG_NFS_USE_NEW_IDMAPPER not set */
+
+static inline int nfs_idmap_init(void)
+{
+ return 0;
+}
+
+static inline void nfs_idmap_quit(void)
+{
+}
+
int nfs_idmap_new(struct nfs_client *);
void nfs_idmap_delete(struct nfs_client *);
+#endif /* CONFIG_NFS_USE_NEW_IDMAPPER */
+
int nfs_map_name_to_uid(struct nfs_client *, const char *, size_t, __u32 *);
int nfs_map_group_to_gid(struct nfs_client *, const char *, size_t, __u32 *);
-int nfs_map_uid_to_name(struct nfs_client *, __u32, char *);
-int nfs_map_gid_to_group(struct nfs_client *, __u32, char *);
+int nfs_map_uid_to_name(struct nfs_client *, __u32, char *, size_t);
+int nfs_map_gid_to_group(struct nfs_client *, __u32, char *, size_t);
extern unsigned int nfs_idmap_cache_timeout;
#endif /* __KERNEL__ */
#define NFS_MOUNT_NORESVPORT 0x40000
#define NFS_MOUNT_LEGACY_INTERFACE 0x80000
+#define NFS_MOUNT_LOCAL_FLOCK 0x100000
+#define NFS_MOUNT_LOCAL_FCNTL 0x200000
+
#endif
__u32 wtmult; /* writes should be multiple of this */
__u32 dtpref; /* pref. readdir transfer size */
__u64 maxfilesize;
+ struct timespec time_delta; /* server time granularity */
__u32 lease_time; /* in seconds */
};
struct nfs4_sequence_res {
struct nfs4_session *sr_session;
- u8 sr_slotid; /* slot used to send request */
+ struct nfs4_slot *sr_slot; /* slot used to send request */
int sr_status; /* sequence operation status */
unsigned long sr_renewal_time;
u32 sr_status_flags;
struct nfs4_sequence_res seq_res;
};
+/*
+ * Common arguments to the rename call
+ */
+struct nfs_renameargs {
+ const struct nfs_fh *old_dir;
+ const struct nfs_fh *new_dir;
+ const struct qstr *old_name;
+ const struct qstr *new_name;
+ const u32 *bitmask;
+ struct nfs4_sequence_args seq_args;
+};
+
+struct nfs_renameres {
+ const struct nfs_server *server;
+ struct nfs4_change_info old_cinfo;
+ struct nfs_fattr *old_fattr;
+ struct nfs4_change_info new_cinfo;
+ struct nfs_fattr *new_fattr;
+ struct nfs4_sequence_res seq_res;
+};
+
/*
* Argument struct for decode_entry function
*/
struct iattr * sattr;
};
-struct nfs_renameargs {
- struct nfs_fh * fromfh;
- const char * fromname;
- unsigned int fromlen;
- struct nfs_fh * tofh;
- const char * toname;
- unsigned int tolen;
-};
-
struct nfs_setattrargs {
struct nfs_fh * fh;
nfs4_stateid stateid;
dev_t rdev;
};
-struct nfs3_renameargs {
- struct nfs_fh * fromfh;
- const char * fromname;
- unsigned int fromlen;
- struct nfs_fh * tofh;
- const char * toname;
- unsigned int tolen;
-};
-
struct nfs3_linkargs {
struct nfs_fh * fromfh;
struct nfs_fh * tofh;
struct page ** pages;
};
-struct nfs3_renameres {
- struct nfs_fattr * fromattr;
- struct nfs_fattr * toattr;
-};
-
struct nfs3_linkres {
struct nfs_fattr * dir_attr;
struct nfs_fattr * fattr;
struct page ** pages; /* zero-copy data */
unsigned int pgbase; /* zero-copy data */
const u32 * bitmask;
+ int plus;
struct nfs4_sequence_args seq_args;
};
struct nfs4_sequence_res seq_res;
};
-struct nfs4_rename_arg {
- const struct nfs_fh * old_dir;
- const struct nfs_fh * new_dir;
- const struct qstr * old_name;
- const struct qstr * new_name;
- const u32 * bitmask;
- struct nfs4_sequence_args seq_args;
-};
-
-struct nfs4_rename_res {
- const struct nfs_server * server;
- struct nfs4_change_info old_cinfo;
- struct nfs_fattr * old_fattr;
- struct nfs4_change_info new_cinfo;
- struct nfs_fattr * new_fattr;
- struct nfs4_sequence_res seq_res;
-};
-
#define NFS4_SETCLIENTID_NAMELEN (127)
struct nfs4_setclientid {
const nfs4_verifier * sc_verifier;
int (*readlink)(struct inode *, struct page *, unsigned int,
unsigned int);
int (*create) (struct inode *, struct dentry *,
- struct iattr *, int, struct nameidata *);
+ struct iattr *, int, struct nfs_open_context *);
int (*remove) (struct inode *, struct qstr *);
void (*unlink_setup) (struct rpc_message *, struct inode *dir);
int (*unlink_done) (struct rpc_task *, struct inode *);
int (*rename) (struct inode *, struct qstr *,
struct inode *, struct qstr *);
+ void (*rename_setup) (struct rpc_message *msg, struct inode *dir);
+ int (*rename_done) (struct rpc_task *task, struct inode *old_dir, struct inode *new_dir);
int (*link) (struct inode *, struct inode *, struct qstr *);
int (*symlink) (struct inode *, struct dentry *, struct page *,
unsigned int, struct iattr *);
int (*mkdir) (struct inode *, struct dentry *, struct iattr *);
int (*rmdir) (struct inode *, struct qstr *);
int (*readdir) (struct dentry *, struct rpc_cred *,
- u64, struct page *, unsigned int, int);
+ u64, struct page **, unsigned int, int);
int (*mknod) (struct inode *, struct dentry *, struct iattr *,
dev_t);
int (*statfs) (struct nfs_server *, struct nfs_fh *,
int (*pathconf) (struct nfs_server *, struct nfs_fh *,
struct nfs_pathconf *);
int (*set_capabilities)(struct nfs_server *, struct nfs_fh *);
- __be32 *(*decode_dirent)(__be32 *, struct nfs_entry *, int plus);
+ __be32 *(*decode_dirent)(struct xdr_stream *, struct nfs_entry *, struct nfs_server *, int plus);
void (*read_setup) (struct nfs_read_data *, struct rpc_message *);
int (*read_done) (struct rpc_task *, struct nfs_read_data *);
void (*write_setup) (struct nfs_write_data *, struct rpc_message *);
int (*lock_check_bounds)(const struct file_lock *);
void (*clear_acl_cache)(struct inode *);
void (*close_context)(struct nfs_open_context *ctx, int);
+ struct inode * (*open_context) (struct inode *dir,
+ struct nfs_open_context *ctx,
+ int open_flags,
+ struct iattr *iattr);
};
/*
int rpcb_v4_register(const u32 program, const u32 version,
const struct sockaddr *address,
const char *netid);
-int rpcb_getport_sync(struct sockaddr_in *, u32, u32, int);
void rpcb_getport_async(struct rpc_task *);
void rpc_call_start(struct rpc_task *);
unsigned int);
void xdr_inline_pages(struct xdr_buf *, unsigned int,
struct page **, unsigned int, unsigned int);
+void xdr_terminate_string(struct xdr_buf *, const u32);
static inline __be32 *xdr_encode_array(__be32 *p, const void *s, unsigned int len)
{
extern void xdr_write_pages(struct xdr_stream *xdr, struct page **pages,
unsigned int base, unsigned int len);
extern void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p);
+extern __be32 *xdr_inline_peek(struct xdr_stream *xdr, size_t nbytes);
extern __be32 *xdr_inline_decode(struct xdr_stream *xdr, size_t nbytes);
extern void xdr_read_pages(struct xdr_stream *xdr, unsigned int len);
extern void xdr_enter_page(struct xdr_stream *xdr, unsigned int len);
#ifdef CONFIG_ROOT_NFS
static int __init mount_nfs_root(void)
{
- void *data = nfs_root_data();
+ char *root_dev, *root_data;
- create_dev("/dev/root", ROOT_DEV);
- if (data &&
- do_mount_root("/dev/root", "nfs", root_mountflags, data) == 0)
- return 1;
- return 0;
+ if (nfs_root_data(&root_dev, &root_data) != 0)
+ return 0;
+ if (do_mount_root(root_dev, "nfs", root_mountflags, root_data) != 0)
+ return 0;
+ return 1;
}
#endif
int
rpcauth_refreshcred(struct rpc_task *task)
{
- struct rpc_cred *cred = task->tk_rqstp->rq_cred;
+ struct rpc_cred *cred;
int err;
cred = task->tk_rqstp->rq_cred;
rpcauth_invalcred(task);
/* Ensure we obtain a new XID! */
xprt_release(task);
- task->tk_action = call_refresh;
+ task->tk_action = call_reserve;
goto out_retry;
case RPC_AUTH_BADCRED:
case RPC_AUTH_BADVERF:
*/
clnt4 = rpc_bind_new_program(clnt, &rpcb_program, RPCBVERS_4);
if (IS_ERR(clnt4)) {
- dprintk("RPC: failed to create local rpcbind v4 "
- "cleint (errno %ld).\n", PTR_ERR(clnt4));
+ dprintk("RPC: failed to bind second program to "
+ "rpcbind v4 client (errno %ld).\n",
+ PTR_ERR(clnt4));
clnt4 = NULL;
}
return -EAFNOSUPPORT;
}
-/**
- * rpcb_getport_sync - obtain the port for an RPC service on a given host
- * @sin: address of remote peer
- * @prog: RPC program number to bind
- * @vers: RPC version number to bind
- * @prot: transport protocol to use to make this request
- *
- * Return value is the requested advertised port number,
- * or a negative errno value.
- *
- * Called from outside the RPC client in a synchronous task context.
- * Uses default timeout parameters specified by underlying transport.
- *
- * XXX: Needs to support IPv6
- */
-int rpcb_getport_sync(struct sockaddr_in *sin, u32 prog, u32 vers, int prot)
-{
- struct rpcbind_args map = {
- .r_prog = prog,
- .r_vers = vers,
- .r_prot = prot,
- .r_port = 0,
- };
- struct rpc_message msg = {
- .rpc_proc = &rpcb_procedures2[RPCBPROC_GETPORT],
- .rpc_argp = &map,
- .rpc_resp = &map,
- };
- struct rpc_clnt *rpcb_clnt;
- int status;
-
- dprintk("RPC: %s(%pI4, %u, %u, %d)\n",
- __func__, &sin->sin_addr.s_addr, prog, vers, prot);
-
- rpcb_clnt = rpcb_create(NULL, (struct sockaddr *)sin,
- sizeof(*sin), prot, RPCBVERS_2);
- if (IS_ERR(rpcb_clnt))
- return PTR_ERR(rpcb_clnt);
-
- status = rpc_call_sync(rpcb_clnt, &msg, 0);
- rpc_shutdown_client(rpcb_clnt);
-
- if (status >= 0) {
- if (map.r_port != 0)
- return map.r_port;
- status = -EACCES;
- }
- return status;
-}
-EXPORT_SYMBOL_GPL(rpcb_getport_sync);
-
static struct rpc_task *rpcb_call_async(struct rpc_clnt *rpcb_clnt, struct rpcbind_args *map, struct rpc_procinfo *proc)
{
struct rpc_message msg = {
* Create the rpciod thread and wait for it to start.
*/
dprintk("RPC: creating workqueue rpciod\n");
- wq = create_workqueue("rpciod");
+ wq = alloc_workqueue("rpciod", WQ_RESCUER, 0);
rpciod_workqueue = wq;
return rpciod_workqueue != NULL;
}
}
EXPORT_SYMBOL_GPL(xdr_decode_string_inplace);
+/**
+ * xdr_terminate_string - '\0'-terminate a string residing in an xdr_buf
+ * @buf: XDR buffer where string resides
+ * @len: length of string, in bytes
+ *
+ */
+void
+xdr_terminate_string(struct xdr_buf *buf, const u32 len)
+{
+ char *kaddr;
+
+ kaddr = kmap_atomic(buf->pages[0], KM_USER0);
+ kaddr[buf->page_base + len] = '\0';
+ kunmap_atomic(kaddr, KM_USER0);
+}
+EXPORT_SYMBOL(xdr_terminate_string);
+
void
xdr_encode_pages(struct xdr_buf *xdr, struct page **pages, unsigned int base,
unsigned int len)
{
struct kvec *tail;
size_t copy;
- char *p;
unsigned int pglen = buf->page_len;
+ unsigned int tailbuf_len;
tail = buf->tail;
BUG_ON (len > pglen);
+ tailbuf_len = buf->buflen - buf->head->iov_len - buf->page_len;
+
/* Shift the tail first */
- if (tail->iov_len != 0) {
- p = (char *)tail->iov_base + len;
+ if (tailbuf_len != 0) {
+ unsigned int free_space = tailbuf_len - tail->iov_len;
+
+ if (len < free_space)
+ free_space = len;
+ tail->iov_len += free_space;
+
+ copy = len;
if (tail->iov_len > len) {
- copy = tail->iov_len - len;
- memmove(p, tail->iov_base, copy);
+ char *p = (char *)tail->iov_base + len;
+ memmove(p, tail->iov_base, tail->iov_len - len);
} else
- buf->buflen -= len;
- /* Copy from the inlined pages into the tail */
- copy = len;
- if (copy > tail->iov_len)
copy = tail->iov_len;
+ /* Copy from the inlined pages into the tail */
_copy_from_pages((char *)tail->iov_base,
buf->pages, buf->page_base + pglen - len,
copy);
}
EXPORT_SYMBOL_GPL(xdr_init_decode);
+/**
+ * xdr_inline_peek - Allow read-ahead in the XDR data stream
+ * @xdr: pointer to xdr_stream struct
+ * @nbytes: number of bytes of data to decode
+ *
+ * Check if the input buffer is long enough to enable us to decode
+ * 'nbytes' more bytes of data starting at the current position.
+ * If so return the current pointer without updating the current
+ * pointer position.
+ */
+__be32 * xdr_inline_peek(struct xdr_stream *xdr, size_t nbytes)
+{
+ __be32 *p = xdr->p;
+ __be32 *q = p + XDR_QUADLEN(nbytes);
+
+ if (unlikely(q > xdr->end || q < p))
+ return NULL;
+ return p;
+}
+EXPORT_SYMBOL_GPL(xdr_inline_peek);
+
/**
* xdr_inline_decode - Retrieve non-page XDR data to decode
* @xdr: pointer to xdr_stream struct
git.openpandora.org / pandora-kernel.git / commitdiff