mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-08 17:18:05 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
552
fs/nfs/callback_proc.c
Normal file
552
fs/nfs/callback_proc.c
Normal file
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|
@ -0,0 +1,552 @@
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/*
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* linux/fs/nfs/callback_proc.c
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*
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* Copyright (C) 2004 Trond Myklebust
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*
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* NFSv4 callback procedures
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*/
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#include <linux/nfs4.h>
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#include <linux/nfs_fs.h>
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#include <linux/slab.h>
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#include <linux/rcupdate.h>
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#include "nfs4_fs.h"
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#include "callback.h"
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#include "delegation.h"
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#include "internal.h"
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#include "pnfs.h"
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#include "nfs4session.h"
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#include "nfs4trace.h"
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#ifdef NFS_DEBUG
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#define NFSDBG_FACILITY NFSDBG_CALLBACK
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#endif
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__be32 nfs4_callback_getattr(struct cb_getattrargs *args,
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struct cb_getattrres *res,
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struct cb_process_state *cps)
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{
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struct nfs_delegation *delegation;
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struct nfs_inode *nfsi;
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struct inode *inode;
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res->status = htonl(NFS4ERR_OP_NOT_IN_SESSION);
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if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */
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goto out;
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res->bitmap[0] = res->bitmap[1] = 0;
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res->status = htonl(NFS4ERR_BADHANDLE);
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dprintk_rcu("NFS: GETATTR callback request from %s\n",
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rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
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inode = nfs_delegation_find_inode(cps->clp, &args->fh);
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if (inode == NULL)
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goto out;
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nfsi = NFS_I(inode);
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rcu_read_lock();
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delegation = rcu_dereference(nfsi->delegation);
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if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0)
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goto out_iput;
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res->size = i_size_read(inode);
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res->change_attr = delegation->change_attr;
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if (nfsi->npages != 0)
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res->change_attr++;
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res->ctime = inode->i_ctime;
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res->mtime = inode->i_mtime;
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res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) &
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args->bitmap[0];
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res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) &
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args->bitmap[1];
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res->status = 0;
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out_iput:
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rcu_read_unlock();
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iput(inode);
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out:
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dprintk("%s: exit with status = %d\n", __func__, ntohl(res->status));
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return res->status;
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}
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__be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy,
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struct cb_process_state *cps)
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{
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struct inode *inode;
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__be32 res;
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res = htonl(NFS4ERR_OP_NOT_IN_SESSION);
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if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */
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goto out;
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dprintk_rcu("NFS: RECALL callback request from %s\n",
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rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
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res = htonl(NFS4ERR_BADHANDLE);
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inode = nfs_delegation_find_inode(cps->clp, &args->fh);
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if (inode == NULL)
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goto out;
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/* Set up a helper thread to actually return the delegation */
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switch (nfs_async_inode_return_delegation(inode, &args->stateid)) {
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case 0:
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res = 0;
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break;
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case -ENOENT:
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res = htonl(NFS4ERR_BAD_STATEID);
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break;
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default:
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res = htonl(NFS4ERR_RESOURCE);
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}
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trace_nfs4_recall_delegation(inode, -ntohl(res));
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iput(inode);
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out:
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dprintk("%s: exit with status = %d\n", __func__, ntohl(res));
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return res;
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}
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#if defined(CONFIG_NFS_V4_1)
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/*
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* Lookup a layout by filehandle.
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*
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* Note: gets a refcount on the layout hdr and on its respective inode.
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* Caller must put the layout hdr and the inode.
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*
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* TODO: keep track of all layouts (and delegations) in a hash table
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* hashed by filehandle.
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*/
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static struct pnfs_layout_hdr * get_layout_by_fh_locked(struct nfs_client *clp,
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struct nfs_fh *fh, nfs4_stateid *stateid)
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{
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struct nfs_server *server;
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struct inode *ino;
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struct pnfs_layout_hdr *lo;
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list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
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list_for_each_entry(lo, &server->layouts, plh_layouts) {
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if (!nfs4_stateid_match_other(&lo->plh_stateid, stateid))
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continue;
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if (nfs_compare_fh(fh, &NFS_I(lo->plh_inode)->fh))
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continue;
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ino = igrab(lo->plh_inode);
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if (!ino)
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break;
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spin_lock(&ino->i_lock);
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/* Is this layout in the process of being freed? */
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if (NFS_I(ino)->layout != lo) {
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spin_unlock(&ino->i_lock);
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iput(ino);
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break;
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}
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pnfs_get_layout_hdr(lo);
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spin_unlock(&ino->i_lock);
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return lo;
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}
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}
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return NULL;
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}
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static struct pnfs_layout_hdr * get_layout_by_fh(struct nfs_client *clp,
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struct nfs_fh *fh, nfs4_stateid *stateid)
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{
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struct pnfs_layout_hdr *lo;
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spin_lock(&clp->cl_lock);
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rcu_read_lock();
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lo = get_layout_by_fh_locked(clp, fh, stateid);
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rcu_read_unlock();
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spin_unlock(&clp->cl_lock);
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return lo;
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}
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static u32 initiate_file_draining(struct nfs_client *clp,
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struct cb_layoutrecallargs *args)
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{
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struct inode *ino;
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struct pnfs_layout_hdr *lo;
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u32 rv = NFS4ERR_NOMATCHING_LAYOUT;
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LIST_HEAD(free_me_list);
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lo = get_layout_by_fh(clp, &args->cbl_fh, &args->cbl_stateid);
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if (!lo)
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goto out;
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ino = lo->plh_inode;
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spin_lock(&ino->i_lock);
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pnfs_set_layout_stateid(lo, &args->cbl_stateid, true);
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spin_unlock(&ino->i_lock);
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pnfs_layoutcommit_inode(ino, false);
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spin_lock(&ino->i_lock);
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if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) ||
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pnfs_mark_matching_lsegs_invalid(lo, &free_me_list,
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&args->cbl_range)) {
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rv = NFS4ERR_DELAY;
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goto unlock;
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}
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if (NFS_SERVER(ino)->pnfs_curr_ld->return_range) {
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NFS_SERVER(ino)->pnfs_curr_ld->return_range(lo,
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&args->cbl_range);
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}
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unlock:
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spin_unlock(&ino->i_lock);
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pnfs_free_lseg_list(&free_me_list);
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pnfs_put_layout_hdr(lo);
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iput(ino);
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out:
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return rv;
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}
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static u32 initiate_bulk_draining(struct nfs_client *clp,
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struct cb_layoutrecallargs *args)
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{
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int stat;
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if (args->cbl_recall_type == RETURN_FSID)
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stat = pnfs_destroy_layouts_byfsid(clp, &args->cbl_fsid, true);
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else
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stat = pnfs_destroy_layouts_byclid(clp, true);
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if (stat != 0)
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return NFS4ERR_DELAY;
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return NFS4ERR_NOMATCHING_LAYOUT;
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}
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static u32 do_callback_layoutrecall(struct nfs_client *clp,
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struct cb_layoutrecallargs *args)
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{
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u32 res;
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dprintk("%s enter, type=%i\n", __func__, args->cbl_recall_type);
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if (args->cbl_recall_type == RETURN_FILE)
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res = initiate_file_draining(clp, args);
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else
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res = initiate_bulk_draining(clp, args);
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dprintk("%s returning %i\n", __func__, res);
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return res;
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}
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__be32 nfs4_callback_layoutrecall(struct cb_layoutrecallargs *args,
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void *dummy, struct cb_process_state *cps)
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{
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u32 res;
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dprintk("%s: -->\n", __func__);
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if (cps->clp)
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res = do_callback_layoutrecall(cps->clp, args);
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else
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res = NFS4ERR_OP_NOT_IN_SESSION;
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dprintk("%s: exit with status = %d\n", __func__, res);
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return cpu_to_be32(res);
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}
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static void pnfs_recall_all_layouts(struct nfs_client *clp)
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{
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struct cb_layoutrecallargs args;
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/* Pretend we got a CB_LAYOUTRECALL(ALL) */
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memset(&args, 0, sizeof(args));
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args.cbl_recall_type = RETURN_ALL;
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/* FIXME we ignore errors, what should we do? */
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do_callback_layoutrecall(clp, &args);
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}
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__be32 nfs4_callback_devicenotify(struct cb_devicenotifyargs *args,
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void *dummy, struct cb_process_state *cps)
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{
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int i;
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__be32 res = 0;
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struct nfs_client *clp = cps->clp;
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struct nfs_server *server = NULL;
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dprintk("%s: -->\n", __func__);
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if (!clp) {
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res = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION);
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goto out;
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||||
}
|
||||
|
||||
for (i = 0; i < args->ndevs; i++) {
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||||
struct cb_devicenotifyitem *dev = &args->devs[i];
|
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|
||||
if (!server ||
|
||||
server->pnfs_curr_ld->id != dev->cbd_layout_type) {
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rcu_read_lock();
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||||
list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link)
|
||||
if (server->pnfs_curr_ld &&
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||||
server->pnfs_curr_ld->id == dev->cbd_layout_type) {
|
||||
rcu_read_unlock();
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||||
goto found;
|
||||
}
|
||||
rcu_read_unlock();
|
||||
dprintk("%s: layout type %u not found\n",
|
||||
__func__, dev->cbd_layout_type);
|
||||
continue;
|
||||
}
|
||||
|
||||
found:
|
||||
nfs4_delete_deviceid(server->pnfs_curr_ld, clp, &dev->cbd_dev_id);
|
||||
}
|
||||
|
||||
out:
|
||||
kfree(args->devs);
|
||||
dprintk("%s: exit with status = %u\n",
|
||||
__func__, be32_to_cpu(res));
|
||||
return res;
|
||||
}
|
||||
|
||||
/*
|
||||
* Validate the sequenceID sent by the server.
|
||||
* Return success if the sequenceID is one more than what we last saw on
|
||||
* this slot, accounting for wraparound. Increments the slot's sequence.
|
||||
*
|
||||
* We don't yet implement a duplicate request cache, instead we set the
|
||||
* back channel ca_maxresponsesize_cached to zero. This is OK for now
|
||||
* since we only currently implement idempotent callbacks anyway.
|
||||
*
|
||||
* We have a single slot backchannel at this time, so we don't bother
|
||||
* checking the used_slots bit array on the table. The lower layer guarantees
|
||||
* a single outstanding callback request at a time.
|
||||
*/
|
||||
static __be32
|
||||
validate_seqid(struct nfs4_slot_table *tbl, struct cb_sequenceargs * args)
|
||||
{
|
||||
struct nfs4_slot *slot;
|
||||
|
||||
dprintk("%s enter. slotid %u seqid %u\n",
|
||||
__func__, args->csa_slotid, args->csa_sequenceid);
|
||||
|
||||
if (args->csa_slotid >= NFS41_BC_MAX_CALLBACKS)
|
||||
return htonl(NFS4ERR_BADSLOT);
|
||||
|
||||
slot = tbl->slots + args->csa_slotid;
|
||||
dprintk("%s slot table seqid: %u\n", __func__, slot->seq_nr);
|
||||
|
||||
/* Normal */
|
||||
if (likely(args->csa_sequenceid == slot->seq_nr + 1)) {
|
||||
slot->seq_nr++;
|
||||
goto out_ok;
|
||||
}
|
||||
|
||||
/* Replay */
|
||||
if (args->csa_sequenceid == slot->seq_nr) {
|
||||
dprintk("%s seqid %u is a replay\n",
|
||||
__func__, args->csa_sequenceid);
|
||||
/* Signal process_op to set this error on next op */
|
||||
if (args->csa_cachethis == 0)
|
||||
return htonl(NFS4ERR_RETRY_UNCACHED_REP);
|
||||
|
||||
/* The ca_maxresponsesize_cached is 0 with no DRC */
|
||||
else if (args->csa_cachethis == 1)
|
||||
return htonl(NFS4ERR_REP_TOO_BIG_TO_CACHE);
|
||||
}
|
||||
|
||||
/* Wraparound */
|
||||
if (args->csa_sequenceid == 1 && (slot->seq_nr + 1) == 0) {
|
||||
slot->seq_nr = 1;
|
||||
goto out_ok;
|
||||
}
|
||||
|
||||
/* Misordered request */
|
||||
return htonl(NFS4ERR_SEQ_MISORDERED);
|
||||
out_ok:
|
||||
tbl->highest_used_slotid = args->csa_slotid;
|
||||
return htonl(NFS4_OK);
|
||||
}
|
||||
|
||||
/*
|
||||
* For each referring call triple, check the session's slot table for
|
||||
* a match. If the slot is in use and the sequence numbers match, the
|
||||
* client is still waiting for a response to the original request.
|
||||
*/
|
||||
static bool referring_call_exists(struct nfs_client *clp,
|
||||
uint32_t nrclists,
|
||||
struct referring_call_list *rclists)
|
||||
{
|
||||
bool status = 0;
|
||||
int i, j;
|
||||
struct nfs4_session *session;
|
||||
struct nfs4_slot_table *tbl;
|
||||
struct referring_call_list *rclist;
|
||||
struct referring_call *ref;
|
||||
|
||||
/*
|
||||
* XXX When client trunking is implemented, this becomes
|
||||
* a session lookup from within the loop
|
||||
*/
|
||||
session = clp->cl_session;
|
||||
tbl = &session->fc_slot_table;
|
||||
|
||||
for (i = 0; i < nrclists; i++) {
|
||||
rclist = &rclists[i];
|
||||
if (memcmp(session->sess_id.data,
|
||||
rclist->rcl_sessionid.data,
|
||||
NFS4_MAX_SESSIONID_LEN) != 0)
|
||||
continue;
|
||||
|
||||
for (j = 0; j < rclist->rcl_nrefcalls; j++) {
|
||||
ref = &rclist->rcl_refcalls[j];
|
||||
|
||||
dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u "
|
||||
"slotid %u\n", __func__,
|
||||
((u32 *)&rclist->rcl_sessionid.data)[0],
|
||||
((u32 *)&rclist->rcl_sessionid.data)[1],
|
||||
((u32 *)&rclist->rcl_sessionid.data)[2],
|
||||
((u32 *)&rclist->rcl_sessionid.data)[3],
|
||||
ref->rc_sequenceid, ref->rc_slotid);
|
||||
|
||||
spin_lock(&tbl->slot_tbl_lock);
|
||||
status = (test_bit(ref->rc_slotid, tbl->used_slots) &&
|
||||
tbl->slots[ref->rc_slotid].seq_nr ==
|
||||
ref->rc_sequenceid);
|
||||
spin_unlock(&tbl->slot_tbl_lock);
|
||||
if (status)
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
out:
|
||||
return status;
|
||||
}
|
||||
|
||||
__be32 nfs4_callback_sequence(struct cb_sequenceargs *args,
|
||||
struct cb_sequenceres *res,
|
||||
struct cb_process_state *cps)
|
||||
{
|
||||
struct nfs4_slot_table *tbl;
|
||||
struct nfs_client *clp;
|
||||
int i;
|
||||
__be32 status = htonl(NFS4ERR_BADSESSION);
|
||||
|
||||
clp = nfs4_find_client_sessionid(cps->net, args->csa_addr,
|
||||
&args->csa_sessionid, cps->minorversion);
|
||||
if (clp == NULL)
|
||||
goto out;
|
||||
|
||||
tbl = &clp->cl_session->bc_slot_table;
|
||||
|
||||
spin_lock(&tbl->slot_tbl_lock);
|
||||
/* state manager is resetting the session */
|
||||
if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) {
|
||||
spin_unlock(&tbl->slot_tbl_lock);
|
||||
status = htonl(NFS4ERR_DELAY);
|
||||
/* Return NFS4ERR_BADSESSION if we're draining the session
|
||||
* in order to reset it.
|
||||
*/
|
||||
if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state))
|
||||
status = htonl(NFS4ERR_BADSESSION);
|
||||
goto out;
|
||||
}
|
||||
|
||||
status = validate_seqid(&clp->cl_session->bc_slot_table, args);
|
||||
spin_unlock(&tbl->slot_tbl_lock);
|
||||
if (status)
|
||||
goto out;
|
||||
|
||||
cps->slotid = args->csa_slotid;
|
||||
|
||||
/*
|
||||
* Check for pending referring calls. If a match is found, a
|
||||
* related callback was received before the response to the original
|
||||
* call.
|
||||
*/
|
||||
if (referring_call_exists(clp, args->csa_nrclists, args->csa_rclists)) {
|
||||
status = htonl(NFS4ERR_DELAY);
|
||||
goto out;
|
||||
}
|
||||
|
||||
memcpy(&res->csr_sessionid, &args->csa_sessionid,
|
||||
sizeof(res->csr_sessionid));
|
||||
res->csr_sequenceid = args->csa_sequenceid;
|
||||
res->csr_slotid = args->csa_slotid;
|
||||
res->csr_highestslotid = NFS41_BC_MAX_CALLBACKS - 1;
|
||||
res->csr_target_highestslotid = NFS41_BC_MAX_CALLBACKS - 1;
|
||||
|
||||
out:
|
||||
cps->clp = clp; /* put in nfs4_callback_compound */
|
||||
for (i = 0; i < args->csa_nrclists; i++)
|
||||
kfree(args->csa_rclists[i].rcl_refcalls);
|
||||
kfree(args->csa_rclists);
|
||||
|
||||
if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) {
|
||||
cps->drc_status = status;
|
||||
status = 0;
|
||||
} else
|
||||
res->csr_status = status;
|
||||
|
||||
trace_nfs4_cb_sequence(args, res, status);
|
||||
dprintk("%s: exit with status = %d res->csr_status %d\n", __func__,
|
||||
ntohl(status), ntohl(res->csr_status));
|
||||
return status;
|
||||
}
|
||||
|
||||
static bool
|
||||
validate_bitmap_values(unsigned long mask)
|
||||
{
|
||||
return (mask & ~RCA4_TYPE_MASK_ALL) == 0;
|
||||
}
|
||||
|
||||
__be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy,
|
||||
struct cb_process_state *cps)
|
||||
{
|
||||
__be32 status;
|
||||
fmode_t flags = 0;
|
||||
|
||||
status = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION);
|
||||
if (!cps->clp) /* set in cb_sequence */
|
||||
goto out;
|
||||
|
||||
dprintk_rcu("NFS: RECALL_ANY callback request from %s\n",
|
||||
rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
|
||||
|
||||
status = cpu_to_be32(NFS4ERR_INVAL);
|
||||
if (!validate_bitmap_values(args->craa_type_mask))
|
||||
goto out;
|
||||
|
||||
status = cpu_to_be32(NFS4_OK);
|
||||
if (test_bit(RCA4_TYPE_MASK_RDATA_DLG, (const unsigned long *)
|
||||
&args->craa_type_mask))
|
||||
flags = FMODE_READ;
|
||||
if (test_bit(RCA4_TYPE_MASK_WDATA_DLG, (const unsigned long *)
|
||||
&args->craa_type_mask))
|
||||
flags |= FMODE_WRITE;
|
||||
if (test_bit(RCA4_TYPE_MASK_FILE_LAYOUT, (const unsigned long *)
|
||||
&args->craa_type_mask))
|
||||
pnfs_recall_all_layouts(cps->clp);
|
||||
if (flags)
|
||||
nfs_expire_unused_delegation_types(cps->clp, flags);
|
||||
out:
|
||||
dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
|
||||
return status;
|
||||
}
|
||||
|
||||
/* Reduce the fore channel's max_slots to the target value */
|
||||
__be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy,
|
||||
struct cb_process_state *cps)
|
||||
{
|
||||
struct nfs4_slot_table *fc_tbl;
|
||||
__be32 status;
|
||||
|
||||
status = htonl(NFS4ERR_OP_NOT_IN_SESSION);
|
||||
if (!cps->clp) /* set in cb_sequence */
|
||||
goto out;
|
||||
|
||||
dprintk_rcu("NFS: CB_RECALL_SLOT request from %s target highest slotid %u\n",
|
||||
rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR),
|
||||
args->crsa_target_highest_slotid);
|
||||
|
||||
fc_tbl = &cps->clp->cl_session->fc_slot_table;
|
||||
|
||||
status = htonl(NFS4_OK);
|
||||
|
||||
nfs41_set_target_slotid(fc_tbl, args->crsa_target_highest_slotid);
|
||||
nfs41_server_notify_target_slotid_update(cps->clp);
|
||||
out:
|
||||
dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
|
||||
return status;
|
||||
}
|
||||
#endif /* CONFIG_NFS_V4_1 */
|
||||
Loading…
Add table
Add a link
Reference in a new issue