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![Linus Torvalds](/assets/img/avatar_default.png)
Current release - regressions: - sched: act_pedit: free pedit keys on bail from offset check Current release - new code bugs: - pds_core: - Kconfig fixes (DEBUGFS and AUXILIARY_BUS) - fix mutex double unlock in error path Previous releases - regressions: - sched: cls_api: remove block_cb from driver_list before freeing - nf_tables: fix ct untracked match breakage - eth: mtk_eth_soc: drop generic vlan rx offload - sched: flower: fix error handler on replace Previous releases - always broken: - tcp: fix skb_copy_ubufs() vs BIG TCP - ipv6: fix skb hash for some RST packets - af_packet: don't send zero-byte data in packet_sendmsg_spkt() - rxrpc: timeout handling fixes after moving client call connection to the I/O thread - ixgbe: fix panic during XDP_TX with > 64 CPUs - igc: RMW the SRRCTL register to prevent losing timestamp config - dsa: mt7530: fix corrupt frames using TRGMII on 40 MHz XTAL MT7621 - r8152: - fix flow control issue of RTL8156A - fix the poor throughput for 2.5G devices - move setting r8153b_rx_agg_chg_indicate() to fix coalescing - enable autosuspend - ncsi: clear Tx enable mode when handling a Config required AEN - octeontx2-pf: macsec: fixes for CN10KB ASIC rev Misc: - 9p: remove INET dependency Signed-off-by: Jakub Kicinski <kuba@kernel.org> -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEE6jPA+I1ugmIBA4hXMUZtbf5SIrsFAmRVeUIACgkQMUZtbf5S IrtTug/9Hhg/L0PTSwrfuGh4W1/cjheMWppNLkwyWQUiKG7FcZQ9vu9PxceE3VRu 2fTqHyvgDMZ8jACovXObeda8z1+g3s/tIPaXELephBIjVlF/h3kG2OaIzlU4jDb4 A4vklwf8eLbfyVBG22QgKl/I70zVMtnmnOo6c6CPuIOTcMPzslndFO9tB0nCg99F DCgCM1BBP1tz+OUch2rLnSzYcqkWqS49BhRk6dhYSliawUFU/5+1tDGDjwWolkfm 0jqP9DjBOSpZKO8m7SpsUNz7NFRIfYErWZ+YebWbggNxj/6TRJTP83MM0tGoK1rE /mz2xpuOki59frlwVOAD6gb/qefjHUp21P4NA7bnhizxFlQL5MHpCeGQ9yLHBSmY 9Q4ArJkM4jXQ0oDA2nII/pz+cDZGEWFGQ14WW3kYUb7WFmISH4I9OiA9i0TBW6OL r1Y/rqzkUvtKWzh9RpiAF9lsdHAm3SX9ES5RfMxzv0x886VOZR4jaMmokRDdPRzq 0r2Oyj75b62+X0r44Fe22Pl/kPS/uh3642xo9h85aAv/EvhT9JNzMvomJm9d6tkb 966I085AVbwxPAy+rl5SWyAq60EWDExNTjZvPv0mSMlmSsQ9iK5//xOF2Saw2zai /44zQ27tVGkCC44Ou5KmfJN3u4OrKkhcuyxtcDr9QeoOdKZRkMg= =9xND -----END PGP SIGNATURE----- Merge tag 'net-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net Pull networking fixes from Jakub Kicinski: "Including fixes from netfilter. Current release - regressions: - sched: act_pedit: free pedit keys on bail from offset check Current release - new code bugs: - pds_core: - Kconfig fixes (DEBUGFS and AUXILIARY_BUS) - fix mutex double unlock in error path Previous releases - regressions: - sched: cls_api: remove block_cb from driver_list before freeing - nf_tables: fix ct untracked match breakage - eth: mtk_eth_soc: drop generic vlan rx offload - sched: flower: fix error handler on replace Previous releases - always broken: - tcp: fix skb_copy_ubufs() vs BIG TCP - ipv6: fix skb hash for some RST packets - af_packet: don't send zero-byte data in packet_sendmsg_spkt() - rxrpc: timeout handling fixes after moving client call connection to the I/O thread - ixgbe: fix panic during XDP_TX with > 64 CPUs - igc: RMW the SRRCTL register to prevent losing timestamp config - dsa: mt7530: fix corrupt frames using TRGMII on 40 MHz XTAL MT7621 - r8152: - fix flow control issue of RTL8156A - fix the poor throughput for 2.5G devices - move setting r8153b_rx_agg_chg_indicate() to fix coalescing - enable autosuspend - ncsi: clear Tx enable mode when handling a Config required AEN - octeontx2-pf: macsec: fixes for CN10KB ASIC rev Misc: - 9p: remove INET dependency" * tag 'net-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (69 commits) net: bcmgenet: Remove phy_stop() from bcmgenet_netif_stop() pds_core: fix mutex double unlock in error path net/sched: flower: fix error handler on replace Revert "net/sched: flower: Fix wrong handle assignment during filter change" net/sched: flower: fix filter idr initialization net: fec: correct the counting of XDP sent frames bonding: add xdp_features support net: enetc: check the index of the SFI rather than the handle sfc: Add back mailing list virtio_net: suppress cpu stall when free_unused_bufs ice: block LAN in case of VF to VF offload net: dsa: mt7530: fix network connectivity with multiple CPU ports net: dsa: mt7530: fix corrupt frames using trgmii on 40 MHz XTAL MT7621 9p: Remove INET dependency netfilter: nf_tables: fix ct untracked match breakage af_packet: Don't send zero-byte data in packet_sendmsg_spkt(). igc: read before write to SRRCTL register pds_core: add AUXILIARY_BUS and NET_DEVLINK to Kconfig pds_core: remove CONFIG_DEBUG_FS from makefile ionic: catch failure from devlink_alloc ...
253 lines
5.4 KiB
C
253 lines
5.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* This file contains vfs directory ops for the 9P2000 protocol.
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*
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* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
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* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
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*/
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/file.h>
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#include <linux/stat.h>
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#include <linux/string.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/uio.h>
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#include <linux/fscache.h>
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#include <net/9p/9p.h>
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#include <net/9p/client.h>
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#include "v9fs.h"
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#include "v9fs_vfs.h"
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#include "fid.h"
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/**
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* struct p9_rdir - readdir accounting
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* @head: start offset of current dirread buffer
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* @tail: end offset of current dirread buffer
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* @buf: dirread buffer
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*
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* private structure for keeping track of readdir
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* allocated on demand
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*/
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struct p9_rdir {
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int head;
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int tail;
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uint8_t buf[];
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};
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/**
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* dt_type - return file type
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* @mistat: mistat structure
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*
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*/
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static inline int dt_type(struct p9_wstat *mistat)
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{
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unsigned long perm = mistat->mode;
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int rettype = DT_REG;
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if (perm & P9_DMDIR)
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rettype = DT_DIR;
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if (perm & P9_DMSYMLINK)
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rettype = DT_LNK;
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return rettype;
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}
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/**
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* v9fs_alloc_rdir_buf - Allocate buffer used for read and readdir
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* @filp: opened file structure
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* @buflen: Length in bytes of buffer to allocate
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*
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*/
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static struct p9_rdir *v9fs_alloc_rdir_buf(struct file *filp, int buflen)
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{
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struct p9_fid *fid = filp->private_data;
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if (!fid->rdir)
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fid->rdir = kzalloc(sizeof(struct p9_rdir) + buflen, GFP_KERNEL);
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return fid->rdir;
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}
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/**
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* v9fs_dir_readdir - iterate through a directory
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* @file: opened file structure
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* @ctx: actor we feed the entries to
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*
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*/
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static int v9fs_dir_readdir(struct file *file, struct dir_context *ctx)
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{
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bool over;
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struct p9_wstat st;
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int err = 0;
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struct p9_fid *fid;
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int buflen;
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struct p9_rdir *rdir;
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struct kvec kvec;
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p9_debug(P9_DEBUG_VFS, "name %pD\n", file);
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fid = file->private_data;
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buflen = fid->clnt->msize - P9_IOHDRSZ;
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rdir = v9fs_alloc_rdir_buf(file, buflen);
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if (!rdir)
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return -ENOMEM;
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kvec.iov_base = rdir->buf;
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kvec.iov_len = buflen;
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while (1) {
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if (rdir->tail == rdir->head) {
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struct iov_iter to;
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int n;
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iov_iter_kvec(&to, ITER_DEST, &kvec, 1, buflen);
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n = p9_client_read(file->private_data, ctx->pos, &to,
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&err);
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if (err)
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return err;
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if (n == 0)
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return 0;
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rdir->head = 0;
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rdir->tail = n;
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}
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while (rdir->head < rdir->tail) {
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err = p9stat_read(fid->clnt, rdir->buf + rdir->head,
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rdir->tail - rdir->head, &st);
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if (err <= 0) {
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p9_debug(P9_DEBUG_VFS, "returned %d\n", err);
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return -EIO;
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}
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over = !dir_emit(ctx, st.name, strlen(st.name),
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v9fs_qid2ino(&st.qid), dt_type(&st));
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p9stat_free(&st);
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if (over)
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return 0;
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rdir->head += err;
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ctx->pos += err;
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}
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}
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}
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/**
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* v9fs_dir_readdir_dotl - iterate through a directory
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* @file: opened file structure
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* @ctx: actor we feed the entries to
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*
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*/
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static int v9fs_dir_readdir_dotl(struct file *file, struct dir_context *ctx)
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{
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int err = 0;
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struct p9_fid *fid;
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int buflen;
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struct p9_rdir *rdir;
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struct p9_dirent curdirent;
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p9_debug(P9_DEBUG_VFS, "name %pD\n", file);
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fid = file->private_data;
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buflen = fid->clnt->msize - P9_READDIRHDRSZ;
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rdir = v9fs_alloc_rdir_buf(file, buflen);
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if (!rdir)
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return -ENOMEM;
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while (1) {
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if (rdir->tail == rdir->head) {
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err = p9_client_readdir(fid, rdir->buf, buflen,
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ctx->pos);
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if (err <= 0)
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return err;
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rdir->head = 0;
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rdir->tail = err;
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}
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while (rdir->head < rdir->tail) {
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err = p9dirent_read(fid->clnt, rdir->buf + rdir->head,
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rdir->tail - rdir->head,
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&curdirent);
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if (err < 0) {
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p9_debug(P9_DEBUG_VFS, "returned %d\n", err);
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return -EIO;
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}
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if (!dir_emit(ctx, curdirent.d_name,
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strlen(curdirent.d_name),
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v9fs_qid2ino(&curdirent.qid),
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curdirent.d_type))
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return 0;
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ctx->pos = curdirent.d_off;
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rdir->head += err;
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}
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}
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}
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/**
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* v9fs_dir_release - close a directory or a file
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* @inode: inode of the directory or file
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* @filp: file pointer to a directory or file
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*
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*/
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int v9fs_dir_release(struct inode *inode, struct file *filp)
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{
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struct v9fs_inode *v9inode = V9FS_I(inode);
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struct p9_fid *fid;
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__le32 version;
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loff_t i_size;
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int retval = 0;
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fid = filp->private_data;
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p9_debug(P9_DEBUG_VFS, "inode: %p filp: %p fid: %d\n",
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inode, filp, fid ? fid->fid : -1);
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if (fid) {
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if ((S_ISREG(inode->i_mode)) && (filp->f_mode & FMODE_WRITE))
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retval = filemap_fdatawrite(inode->i_mapping);
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spin_lock(&inode->i_lock);
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hlist_del(&fid->ilist);
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spin_unlock(&inode->i_lock);
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retval = p9_fid_put(fid);
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}
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if ((filp->f_mode & FMODE_WRITE)) {
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version = cpu_to_le32(v9inode->qid.version);
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i_size = i_size_read(inode);
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fscache_unuse_cookie(v9fs_inode_cookie(v9inode),
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&version, &i_size);
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} else {
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fscache_unuse_cookie(v9fs_inode_cookie(v9inode), NULL, NULL);
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}
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return retval;
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}
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const struct file_operations v9fs_dir_operations = {
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.read = generic_read_dir,
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.llseek = generic_file_llseek,
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.iterate_shared = v9fs_dir_readdir,
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.open = v9fs_file_open,
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.release = v9fs_dir_release,
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};
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const struct file_operations v9fs_dir_operations_dotl = {
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.read = generic_read_dir,
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.llseek = generic_file_llseek,
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.iterate_shared = v9fs_dir_readdir_dotl,
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.open = v9fs_file_open,
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.release = v9fs_dir_release,
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.fsync = v9fs_file_fsync_dotl,
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};
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