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1769 lines
47 KiB
1769 lines
47 KiB
// SPDX-License-Identifier: LGPL-2.1 |
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/* |
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* fs/cifs/cifsfs.c |
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* |
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* Copyright (C) International Business Machines Corp., 2002,2008 |
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* Author(s): Steve French ([email protected]) |
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* |
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* Common Internet FileSystem (CIFS) client |
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* |
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*/ |
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|
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/* Note that BB means BUGBUG (ie something to fix eventually) */ |
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|
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#include <linux/module.h> |
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#include <linux/fs.h> |
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#include <linux/mount.h> |
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#include <linux/slab.h> |
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#include <linux/init.h> |
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#include <linux/list.h> |
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#include <linux/seq_file.h> |
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#include <linux/vfs.h> |
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#include <linux/mempool.h> |
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#include <linux/delay.h> |
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#include <linux/kthread.h> |
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#include <linux/freezer.h> |
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#include <linux/namei.h> |
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#include <linux/random.h> |
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#include <linux/uuid.h> |
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#include <linux/xattr.h> |
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#include <net/ipv6.h> |
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#include "cifsfs.h" |
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#include "cifspdu.h" |
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#define DECLARE_GLOBALS_HERE |
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#include "cifsglob.h" |
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#include "cifsproto.h" |
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#include "cifs_debug.h" |
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#include "cifs_fs_sb.h" |
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#include <linux/mm.h> |
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#include <linux/key-type.h> |
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#include "cifs_spnego.h" |
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#include "fscache.h" |
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#include "smb2pdu.h" |
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#ifdef CONFIG_CIFS_DFS_UPCALL |
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#include "dfs_cache.h" |
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#endif |
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#ifdef CONFIG_CIFS_SWN_UPCALL |
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#include "netlink.h" |
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#endif |
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#include "fs_context.h" |
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|
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/* |
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* DOS dates from 1980/1/1 through 2107/12/31 |
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* Protocol specifications indicate the range should be to 119, which |
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* limits maximum year to 2099. But this range has not been checked. |
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*/ |
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#define SMB_DATE_MAX (127<<9 | 12<<5 | 31) |
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#define SMB_DATE_MIN (0<<9 | 1<<5 | 1) |
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#define SMB_TIME_MAX (23<<11 | 59<<5 | 29) |
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|
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int cifsFYI = 0; |
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bool traceSMB; |
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bool enable_oplocks = true; |
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bool linuxExtEnabled = true; |
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bool lookupCacheEnabled = true; |
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bool disable_legacy_dialects; /* false by default */ |
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bool enable_gcm_256 = true; |
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bool require_gcm_256; /* false by default */ |
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bool enable_negotiate_signing; /* false by default */ |
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unsigned int global_secflags = CIFSSEC_DEF; |
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/* unsigned int ntlmv2_support = 0; */ |
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unsigned int sign_CIFS_PDUs = 1; |
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static const struct super_operations cifs_super_ops; |
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unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
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module_param(CIFSMaxBufSize, uint, 0444); |
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MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header) " |
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"for CIFS requests. " |
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"Default: 16384 Range: 8192 to 130048"); |
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unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; |
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module_param(cifs_min_rcv, uint, 0444); |
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MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " |
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"1 to 64"); |
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unsigned int cifs_min_small = 30; |
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module_param(cifs_min_small, uint, 0444); |
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MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " |
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"Range: 2 to 256"); |
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unsigned int cifs_max_pending = CIFS_MAX_REQ; |
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module_param(cifs_max_pending, uint, 0444); |
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MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server for " |
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"CIFS/SMB1 dialect (N/A for SMB3) " |
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"Default: 32767 Range: 2 to 32767."); |
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#ifdef CONFIG_CIFS_STATS2 |
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unsigned int slow_rsp_threshold = 1; |
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module_param(slow_rsp_threshold, uint, 0644); |
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MODULE_PARM_DESC(slow_rsp_threshold, "Amount of time (in seconds) to wait " |
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"before logging that a response is delayed. " |
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"Default: 1 (if set to 0 disables msg)."); |
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#endif /* STATS2 */ |
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|
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module_param(enable_oplocks, bool, 0644); |
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MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks. Default: y/Y/1"); |
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|
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module_param(enable_gcm_256, bool, 0644); |
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MODULE_PARM_DESC(enable_gcm_256, "Enable requesting strongest (256 bit) GCM encryption. Default: n/N/0"); |
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|
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module_param(require_gcm_256, bool, 0644); |
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MODULE_PARM_DESC(require_gcm_256, "Require strongest (256 bit) GCM encryption. Default: n/N/0"); |
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|
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module_param(enable_negotiate_signing, bool, 0644); |
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MODULE_PARM_DESC(enable_negotiate_signing, "Enable negotiating packet signing algorithm with server. Default: n/N/0"); |
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|
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module_param(disable_legacy_dialects, bool, 0644); |
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MODULE_PARM_DESC(disable_legacy_dialects, "To improve security it may be " |
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"helpful to restrict the ability to " |
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"override the default dialects (SMB2.1, " |
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"SMB3 and SMB3.02) on mount with old " |
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"dialects (CIFS/SMB1 and SMB2) since " |
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"vers=1.0 (CIFS/SMB1) and vers=2.0 are weaker" |
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" and less secure. Default: n/N/0"); |
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|
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extern mempool_t *cifs_sm_req_poolp; |
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extern mempool_t *cifs_req_poolp; |
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extern mempool_t *cifs_mid_poolp; |
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|
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struct workqueue_struct *cifsiod_wq; |
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struct workqueue_struct *decrypt_wq; |
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struct workqueue_struct *fileinfo_put_wq; |
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struct workqueue_struct *cifsoplockd_wq; |
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struct workqueue_struct *deferredclose_wq; |
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__u32 cifs_lock_secret; |
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|
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/* |
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* Bumps refcount for cifs super block. |
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* Note that it should be only called if a referece to VFS super block is |
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* already held, e.g. in open-type syscalls context. Otherwise it can race with |
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* atomic_dec_and_test in deactivate_locked_super. |
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*/ |
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void |
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cifs_sb_active(struct super_block *sb) |
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{ |
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struct cifs_sb_info *server = CIFS_SB(sb); |
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|
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if (atomic_inc_return(&server->active) == 1) |
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atomic_inc(&sb->s_active); |
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} |
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|
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void |
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cifs_sb_deactive(struct super_block *sb) |
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{ |
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struct cifs_sb_info *server = CIFS_SB(sb); |
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|
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if (atomic_dec_and_test(&server->active)) |
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deactivate_super(sb); |
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} |
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|
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static int |
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cifs_read_super(struct super_block *sb) |
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{ |
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struct inode *inode; |
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struct cifs_sb_info *cifs_sb; |
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struct cifs_tcon *tcon; |
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struct timespec64 ts; |
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int rc = 0; |
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cifs_sb = CIFS_SB(sb); |
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tcon = cifs_sb_master_tcon(cifs_sb); |
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|
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL) |
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sb->s_flags |= SB_POSIXACL; |
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|
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if (tcon->snapshot_time) |
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sb->s_flags |= SB_RDONLY; |
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|
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if (tcon->ses->capabilities & tcon->ses->server->vals->cap_large_files) |
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sb->s_maxbytes = MAX_LFS_FILESIZE; |
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else |
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sb->s_maxbytes = MAX_NON_LFS; |
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|
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/* |
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* Some very old servers like DOS and OS/2 used 2 second granularity |
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* (while all current servers use 100ns granularity - see MS-DTYP) |
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* but 1 second is the maximum allowed granularity for the VFS |
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* so for old servers set time granularity to 1 second while for |
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* everything else (current servers) set it to 100ns. |
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*/ |
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if ((tcon->ses->server->vals->protocol_id == SMB10_PROT_ID) && |
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((tcon->ses->capabilities & |
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tcon->ses->server->vals->cap_nt_find) == 0) && |
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!tcon->unix_ext) { |
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sb->s_time_gran = 1000000000; /* 1 second is max allowed gran */ |
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ts = cnvrtDosUnixTm(cpu_to_le16(SMB_DATE_MIN), 0, 0); |
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sb->s_time_min = ts.tv_sec; |
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ts = cnvrtDosUnixTm(cpu_to_le16(SMB_DATE_MAX), |
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cpu_to_le16(SMB_TIME_MAX), 0); |
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sb->s_time_max = ts.tv_sec; |
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} else { |
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/* |
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* Almost every server, including all SMB2+, uses DCE TIME |
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* ie 100 nanosecond units, since 1601. See MS-DTYP and MS-FSCC |
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*/ |
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sb->s_time_gran = 100; |
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ts = cifs_NTtimeToUnix(0); |
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sb->s_time_min = ts.tv_sec; |
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ts = cifs_NTtimeToUnix(cpu_to_le64(S64_MAX)); |
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sb->s_time_max = ts.tv_sec; |
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} |
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|
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sb->s_magic = CIFS_MAGIC_NUMBER; |
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sb->s_op = &cifs_super_ops; |
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sb->s_xattr = cifs_xattr_handlers; |
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rc = super_setup_bdi(sb); |
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if (rc) |
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goto out_no_root; |
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/* tune readahead according to rsize if readahead size not set on mount */ |
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if (cifs_sb->ctx->rasize) |
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sb->s_bdi->ra_pages = cifs_sb->ctx->rasize / PAGE_SIZE; |
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else |
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sb->s_bdi->ra_pages = cifs_sb->ctx->rsize / PAGE_SIZE; |
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sb->s_blocksize = CIFS_MAX_MSGSIZE; |
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sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ |
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inode = cifs_root_iget(sb); |
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if (IS_ERR(inode)) { |
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rc = PTR_ERR(inode); |
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goto out_no_root; |
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} |
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if (tcon->nocase) |
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sb->s_d_op = &cifs_ci_dentry_ops; |
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else |
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sb->s_d_op = &cifs_dentry_ops; |
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sb->s_root = d_make_root(inode); |
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if (!sb->s_root) { |
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rc = -ENOMEM; |
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goto out_no_root; |
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} |
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#ifdef CONFIG_CIFS_NFSD_EXPORT |
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
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cifs_dbg(FYI, "export ops supported\n"); |
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sb->s_export_op = &cifs_export_ops; |
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} |
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#endif /* CONFIG_CIFS_NFSD_EXPORT */ |
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return 0; |
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out_no_root: |
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cifs_dbg(VFS, "%s: get root inode failed\n", __func__); |
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return rc; |
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} |
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static void cifs_kill_sb(struct super_block *sb) |
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{ |
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struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
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struct cifs_tcon *tcon; |
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struct cached_fid *cfid; |
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|
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/* |
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* We ned to release all dentries for the cached directories |
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* before we kill the sb. |
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*/ |
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if (cifs_sb->root) { |
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dput(cifs_sb->root); |
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cifs_sb->root = NULL; |
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} |
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tcon = cifs_sb_master_tcon(cifs_sb); |
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if (tcon) { |
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cfid = &tcon->crfid; |
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mutex_lock(&cfid->fid_mutex); |
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if (cfid->dentry) { |
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dput(cfid->dentry); |
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cfid->dentry = NULL; |
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} |
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mutex_unlock(&cfid->fid_mutex); |
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} |
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kill_anon_super(sb); |
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cifs_umount(cifs_sb); |
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} |
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static int |
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cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
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{ |
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struct super_block *sb = dentry->d_sb; |
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struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
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struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
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struct TCP_Server_Info *server = tcon->ses->server; |
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unsigned int xid; |
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int rc = 0; |
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xid = get_xid(); |
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if (le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength) > 0) |
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buf->f_namelen = |
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le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength); |
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else |
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buf->f_namelen = PATH_MAX; |
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|
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buf->f_fsid.val[0] = tcon->vol_serial_number; |
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/* are using part of create time for more randomness, see man statfs */ |
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buf->f_fsid.val[1] = (int)le64_to_cpu(tcon->vol_create_time); |
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|
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buf->f_files = 0; /* undefined */ |
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buf->f_ffree = 0; /* unlimited */ |
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|
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if (server->ops->queryfs) |
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rc = server->ops->queryfs(xid, tcon, cifs_sb, buf); |
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|
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free_xid(xid); |
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return rc; |
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} |
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|
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static long cifs_fallocate(struct file *file, int mode, loff_t off, loff_t len) |
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{ |
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struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file); |
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struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
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struct TCP_Server_Info *server = tcon->ses->server; |
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|
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if (server->ops->fallocate) |
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return server->ops->fallocate(file, tcon, mode, off, len); |
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|
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return -EOPNOTSUPP; |
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} |
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|
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static int cifs_permission(struct user_namespace *mnt_userns, |
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struct inode *inode, int mask) |
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{ |
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struct cifs_sb_info *cifs_sb; |
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|
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cifs_sb = CIFS_SB(inode->i_sb); |
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|
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { |
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if ((mask & MAY_EXEC) && !execute_ok(inode)) |
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return -EACCES; |
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else |
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return 0; |
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} else /* file mode might have been restricted at mount time |
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on the client (above and beyond ACL on servers) for |
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servers which do not support setting and viewing mode bits, |
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so allowing client to check permissions is useful */ |
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return generic_permission(&init_user_ns, inode, mask); |
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} |
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|
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static struct kmem_cache *cifs_inode_cachep; |
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static struct kmem_cache *cifs_req_cachep; |
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static struct kmem_cache *cifs_mid_cachep; |
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static struct kmem_cache *cifs_sm_req_cachep; |
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mempool_t *cifs_sm_req_poolp; |
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mempool_t *cifs_req_poolp; |
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mempool_t *cifs_mid_poolp; |
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|
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static struct inode * |
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cifs_alloc_inode(struct super_block *sb) |
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{ |
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struct cifsInodeInfo *cifs_inode; |
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cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
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if (!cifs_inode) |
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return NULL; |
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cifs_inode->cifsAttrs = 0x20; /* default */ |
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cifs_inode->time = 0; |
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/* |
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* Until the file is open and we have gotten oplock info back from the |
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* server, can not assume caching of file data or metadata. |
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*/ |
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cifs_set_oplock_level(cifs_inode, 0); |
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cifs_inode->flags = 0; |
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spin_lock_init(&cifs_inode->writers_lock); |
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cifs_inode->writers = 0; |
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cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
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cifs_inode->server_eof = 0; |
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cifs_inode->uniqueid = 0; |
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cifs_inode->createtime = 0; |
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cifs_inode->epoch = 0; |
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spin_lock_init(&cifs_inode->open_file_lock); |
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generate_random_uuid(cifs_inode->lease_key); |
|
|
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/* |
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* Can not set i_flags here - they get immediately overwritten to zero |
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* by the VFS. |
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*/ |
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/* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; */ |
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INIT_LIST_HEAD(&cifs_inode->openFileList); |
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INIT_LIST_HEAD(&cifs_inode->llist); |
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INIT_LIST_HEAD(&cifs_inode->deferred_closes); |
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spin_lock_init(&cifs_inode->deferred_lock); |
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return &cifs_inode->vfs_inode; |
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} |
|
|
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static void |
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cifs_free_inode(struct inode *inode) |
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{ |
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kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); |
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} |
|
|
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static void |
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cifs_evict_inode(struct inode *inode) |
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{ |
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truncate_inode_pages_final(&inode->i_data); |
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clear_inode(inode); |
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cifs_fscache_release_inode_cookie(inode); |
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} |
|
|
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static void |
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cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) |
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{ |
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struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr; |
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struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr; |
|
|
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seq_puts(s, ",addr="); |
|
|
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switch (server->dstaddr.ss_family) { |
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case AF_INET: |
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seq_printf(s, "%pI4", &sa->sin_addr.s_addr); |
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break; |
|
case AF_INET6: |
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seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr); |
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if (sa6->sin6_scope_id) |
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seq_printf(s, "%%%u", sa6->sin6_scope_id); |
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break; |
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default: |
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seq_puts(s, "(unknown)"); |
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} |
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if (server->rdma) |
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seq_puts(s, ",rdma"); |
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} |
|
|
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static void |
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cifs_show_security(struct seq_file *s, struct cifs_ses *ses) |
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{ |
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if (ses->sectype == Unspecified) { |
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if (ses->user_name == NULL) |
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seq_puts(s, ",sec=none"); |
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return; |
|
} |
|
|
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seq_puts(s, ",sec="); |
|
|
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switch (ses->sectype) { |
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case LANMAN: |
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seq_puts(s, "lanman"); |
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break; |
|
case NTLMv2: |
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seq_puts(s, "ntlmv2"); |
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break; |
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case NTLM: |
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seq_puts(s, "ntlm"); |
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break; |
|
case Kerberos: |
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seq_puts(s, "krb5"); |
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break; |
|
case RawNTLMSSP: |
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seq_puts(s, "ntlmssp"); |
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break; |
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default: |
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/* shouldn't ever happen */ |
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seq_puts(s, "unknown"); |
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break; |
|
} |
|
|
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if (ses->sign) |
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seq_puts(s, "i"); |
|
|
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if (ses->sectype == Kerberos) |
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seq_printf(s, ",cruid=%u", |
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from_kuid_munged(&init_user_ns, ses->cred_uid)); |
|
} |
|
|
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static void |
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cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb) |
|
{ |
|
seq_puts(s, ",cache="); |
|
|
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) |
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seq_puts(s, "strict"); |
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else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) |
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seq_puts(s, "none"); |
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else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE) |
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seq_puts(s, "singleclient"); /* assume only one client access */ |
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else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE) |
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seq_puts(s, "ro"); /* read only caching assumed */ |
|
else |
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seq_puts(s, "loose"); |
|
} |
|
|
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/* |
|
* cifs_show_devname() is used so we show the mount device name with correct |
|
* format (e.g. forward slashes vs. back slashes) in /proc/mounts |
|
*/ |
|
static int cifs_show_devname(struct seq_file *m, struct dentry *root) |
|
{ |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb); |
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char *devname = kstrdup(cifs_sb->ctx->source, GFP_KERNEL); |
|
|
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if (devname == NULL) |
|
seq_puts(m, "none"); |
|
else { |
|
convert_delimiter(devname, '/'); |
|
/* escape all spaces in share names */ |
|
seq_escape(m, devname, " \t"); |
|
kfree(devname); |
|
} |
|
return 0; |
|
} |
|
|
|
/* |
|
* cifs_show_options() is for displaying mount options in /proc/mounts. |
|
* Not all settable options are displayed but most of the important |
|
* ones are. |
|
*/ |
|
static int |
|
cifs_show_options(struct seq_file *s, struct dentry *root) |
|
{ |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb); |
|
struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
|
struct sockaddr *srcaddr; |
|
srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr; |
|
|
|
seq_show_option(s, "vers", tcon->ses->server->vals->version_string); |
|
cifs_show_security(s, tcon->ses); |
|
cifs_show_cache_flavor(s, cifs_sb); |
|
|
|
if (tcon->no_lease) |
|
seq_puts(s, ",nolease"); |
|
if (cifs_sb->ctx->multiuser) |
|
seq_puts(s, ",multiuser"); |
|
else if (tcon->ses->user_name) |
|
seq_show_option(s, "username", tcon->ses->user_name); |
|
|
|
if (tcon->ses->domainName && tcon->ses->domainName[0] != 0) |
|
seq_show_option(s, "domain", tcon->ses->domainName); |
|
|
|
if (srcaddr->sa_family != AF_UNSPEC) { |
|
struct sockaddr_in *saddr4; |
|
struct sockaddr_in6 *saddr6; |
|
saddr4 = (struct sockaddr_in *)srcaddr; |
|
saddr6 = (struct sockaddr_in6 *)srcaddr; |
|
if (srcaddr->sa_family == AF_INET6) |
|
seq_printf(s, ",srcaddr=%pI6c", |
|
&saddr6->sin6_addr); |
|
else if (srcaddr->sa_family == AF_INET) |
|
seq_printf(s, ",srcaddr=%pI4", |
|
&saddr4->sin_addr.s_addr); |
|
else |
|
seq_printf(s, ",srcaddr=BAD-AF:%i", |
|
(int)(srcaddr->sa_family)); |
|
} |
|
|
|
seq_printf(s, ",uid=%u", |
|
from_kuid_munged(&init_user_ns, cifs_sb->ctx->linux_uid)); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
|
seq_puts(s, ",forceuid"); |
|
else |
|
seq_puts(s, ",noforceuid"); |
|
|
|
seq_printf(s, ",gid=%u", |
|
from_kgid_munged(&init_user_ns, cifs_sb->ctx->linux_gid)); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
|
seq_puts(s, ",forcegid"); |
|
else |
|
seq_puts(s, ",noforcegid"); |
|
|
|
cifs_show_address(s, tcon->ses->server); |
|
|
|
if (!tcon->unix_ext) |
|
seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho", |
|
cifs_sb->ctx->file_mode, |
|
cifs_sb->ctx->dir_mode); |
|
if (cifs_sb->ctx->iocharset) |
|
seq_printf(s, ",iocharset=%s", cifs_sb->ctx->iocharset); |
|
if (tcon->seal) |
|
seq_puts(s, ",seal"); |
|
else if (tcon->ses->server->ignore_signature) |
|
seq_puts(s, ",signloosely"); |
|
if (tcon->nocase) |
|
seq_puts(s, ",nocase"); |
|
if (tcon->nodelete) |
|
seq_puts(s, ",nodelete"); |
|
if (tcon->local_lease) |
|
seq_puts(s, ",locallease"); |
|
if (tcon->retry) |
|
seq_puts(s, ",hard"); |
|
else |
|
seq_puts(s, ",soft"); |
|
if (tcon->use_persistent) |
|
seq_puts(s, ",persistenthandles"); |
|
else if (tcon->use_resilient) |
|
seq_puts(s, ",resilienthandles"); |
|
if (tcon->posix_extensions) |
|
seq_puts(s, ",posix"); |
|
else if (tcon->unix_ext) |
|
seq_puts(s, ",unix"); |
|
else |
|
seq_puts(s, ",nounix"); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS) |
|
seq_puts(s, ",nodfs"); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) |
|
seq_puts(s, ",posixpaths"); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) |
|
seq_puts(s, ",setuids"); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL) |
|
seq_puts(s, ",idsfromsid"); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) |
|
seq_puts(s, ",serverino"); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) |
|
seq_puts(s, ",rwpidforward"); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) |
|
seq_puts(s, ",forcemand"); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) |
|
seq_puts(s, ",nouser_xattr"); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) |
|
seq_puts(s, ",mapchars"); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR) |
|
seq_puts(s, ",mapposix"); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) |
|
seq_puts(s, ",sfu"); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
|
seq_puts(s, ",nobrl"); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_HANDLE_CACHE) |
|
seq_puts(s, ",nohandlecache"); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) |
|
seq_puts(s, ",modefromsid"); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) |
|
seq_puts(s, ",cifsacl"); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) |
|
seq_puts(s, ",dynperm"); |
|
if (root->d_sb->s_flags & SB_POSIXACL) |
|
seq_puts(s, ",acl"); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) |
|
seq_puts(s, ",mfsymlinks"); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) |
|
seq_puts(s, ",fsc"); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC) |
|
seq_puts(s, ",nostrictsync"); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
|
seq_puts(s, ",noperm"); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID) |
|
seq_printf(s, ",backupuid=%u", |
|
from_kuid_munged(&init_user_ns, |
|
cifs_sb->ctx->backupuid)); |
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID) |
|
seq_printf(s, ",backupgid=%u", |
|
from_kgid_munged(&init_user_ns, |
|
cifs_sb->ctx->backupgid)); |
|
|
|
seq_printf(s, ",rsize=%u", cifs_sb->ctx->rsize); |
|
seq_printf(s, ",wsize=%u", cifs_sb->ctx->wsize); |
|
seq_printf(s, ",bsize=%u", cifs_sb->ctx->bsize); |
|
if (cifs_sb->ctx->rasize) |
|
seq_printf(s, ",rasize=%u", cifs_sb->ctx->rasize); |
|
if (tcon->ses->server->min_offload) |
|
seq_printf(s, ",esize=%u", tcon->ses->server->min_offload); |
|
seq_printf(s, ",echo_interval=%lu", |
|
tcon->ses->server->echo_interval / HZ); |
|
|
|
/* Only display max_credits if it was overridden on mount */ |
|
if (tcon->ses->server->max_credits != SMB2_MAX_CREDITS_AVAILABLE) |
|
seq_printf(s, ",max_credits=%u", tcon->ses->server->max_credits); |
|
|
|
if (tcon->snapshot_time) |
|
seq_printf(s, ",snapshot=%llu", tcon->snapshot_time); |
|
if (tcon->handle_timeout) |
|
seq_printf(s, ",handletimeout=%u", tcon->handle_timeout); |
|
|
|
/* |
|
* Display file and directory attribute timeout in seconds. |
|
* If file and directory attribute timeout the same then actimeo |
|
* was likely specified on mount |
|
*/ |
|
if (cifs_sb->ctx->acdirmax == cifs_sb->ctx->acregmax) |
|
seq_printf(s, ",actimeo=%lu", cifs_sb->ctx->acregmax / HZ); |
|
else { |
|
seq_printf(s, ",acdirmax=%lu", cifs_sb->ctx->acdirmax / HZ); |
|
seq_printf(s, ",acregmax=%lu", cifs_sb->ctx->acregmax / HZ); |
|
} |
|
|
|
if (tcon->ses->chan_max > 1) |
|
seq_printf(s, ",multichannel,max_channels=%zu", |
|
tcon->ses->chan_max); |
|
|
|
if (tcon->use_witness) |
|
seq_puts(s, ",witness"); |
|
|
|
return 0; |
|
} |
|
|
|
static void cifs_umount_begin(struct super_block *sb) |
|
{ |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
|
struct cifs_tcon *tcon; |
|
|
|
if (cifs_sb == NULL) |
|
return; |
|
|
|
tcon = cifs_sb_master_tcon(cifs_sb); |
|
|
|
spin_lock(&cifs_tcp_ses_lock); |
|
if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) { |
|
/* we have other mounts to same share or we have |
|
already tried to force umount this and woken up |
|
all waiting network requests, nothing to do */ |
|
spin_unlock(&cifs_tcp_ses_lock); |
|
return; |
|
} else if (tcon->tc_count == 1) |
|
tcon->tidStatus = CifsExiting; |
|
spin_unlock(&cifs_tcp_ses_lock); |
|
|
|
/* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
|
/* cancel_notify_requests(tcon); */ |
|
if (tcon->ses && tcon->ses->server) { |
|
cifs_dbg(FYI, "wake up tasks now - umount begin not complete\n"); |
|
wake_up_all(&tcon->ses->server->request_q); |
|
wake_up_all(&tcon->ses->server->response_q); |
|
msleep(1); /* yield */ |
|
/* we have to kick the requests once more */ |
|
wake_up_all(&tcon->ses->server->response_q); |
|
msleep(1); |
|
} |
|
|
|
return; |
|
} |
|
|
|
#ifdef CONFIG_CIFS_STATS2 |
|
static int cifs_show_stats(struct seq_file *s, struct dentry *root) |
|
{ |
|
/* BB FIXME */ |
|
return 0; |
|
} |
|
#endif |
|
|
|
static int cifs_drop_inode(struct inode *inode) |
|
{ |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
|
|
|
/* no serverino => unconditional eviction */ |
|
return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) || |
|
generic_drop_inode(inode); |
|
} |
|
|
|
static const struct super_operations cifs_super_ops = { |
|
.statfs = cifs_statfs, |
|
.alloc_inode = cifs_alloc_inode, |
|
.free_inode = cifs_free_inode, |
|
.drop_inode = cifs_drop_inode, |
|
.evict_inode = cifs_evict_inode, |
|
/* .show_path = cifs_show_path, */ /* Would we ever need show path? */ |
|
.show_devname = cifs_show_devname, |
|
/* .delete_inode = cifs_delete_inode, */ /* Do not need above |
|
function unless later we add lazy close of inodes or unless the |
|
kernel forgets to call us with the same number of releases (closes) |
|
as opens */ |
|
.show_options = cifs_show_options, |
|
.umount_begin = cifs_umount_begin, |
|
#ifdef CONFIG_CIFS_STATS2 |
|
.show_stats = cifs_show_stats, |
|
#endif |
|
}; |
|
|
|
/* |
|
* Get root dentry from superblock according to prefix path mount option. |
|
* Return dentry with refcount + 1 on success and NULL otherwise. |
|
*/ |
|
static struct dentry * |
|
cifs_get_root(struct smb3_fs_context *ctx, struct super_block *sb) |
|
{ |
|
struct dentry *dentry; |
|
struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
|
char *full_path = NULL; |
|
char *s, *p; |
|
char sep; |
|
|
|
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) |
|
return dget(sb->s_root); |
|
|
|
full_path = cifs_build_path_to_root(ctx, cifs_sb, |
|
cifs_sb_master_tcon(cifs_sb), 0); |
|
if (full_path == NULL) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
cifs_dbg(FYI, "Get root dentry for %s\n", full_path); |
|
|
|
sep = CIFS_DIR_SEP(cifs_sb); |
|
dentry = dget(sb->s_root); |
|
p = s = full_path; |
|
|
|
do { |
|
struct inode *dir = d_inode(dentry); |
|
struct dentry *child; |
|
|
|
if (!S_ISDIR(dir->i_mode)) { |
|
dput(dentry); |
|
dentry = ERR_PTR(-ENOTDIR); |
|
break; |
|
} |
|
|
|
/* skip separators */ |
|
while (*s == sep) |
|
s++; |
|
if (!*s) |
|
break; |
|
p = s++; |
|
/* next separator */ |
|
while (*s && *s != sep) |
|
s++; |
|
|
|
child = lookup_positive_unlocked(p, dentry, s - p); |
|
dput(dentry); |
|
dentry = child; |
|
} while (!IS_ERR(dentry)); |
|
kfree(full_path); |
|
return dentry; |
|
} |
|
|
|
static int cifs_set_super(struct super_block *sb, void *data) |
|
{ |
|
struct cifs_mnt_data *mnt_data = data; |
|
sb->s_fs_info = mnt_data->cifs_sb; |
|
return set_anon_super(sb, NULL); |
|
} |
|
|
|
struct dentry * |
|
cifs_smb3_do_mount(struct file_system_type *fs_type, |
|
int flags, struct smb3_fs_context *old_ctx) |
|
{ |
|
int rc; |
|
struct super_block *sb; |
|
struct cifs_sb_info *cifs_sb = NULL; |
|
struct cifs_mnt_data mnt_data; |
|
struct dentry *root; |
|
|
|
/* |
|
* Prints in Kernel / CIFS log the attempted mount operation |
|
* If CIFS_DEBUG && cifs_FYI |
|
*/ |
|
if (cifsFYI) |
|
cifs_dbg(FYI, "Devname: %s flags: %d\n", old_ctx->UNC, flags); |
|
else |
|
cifs_info("Attempting to mount %s\n", old_ctx->UNC); |
|
|
|
cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); |
|
if (cifs_sb == NULL) { |
|
root = ERR_PTR(-ENOMEM); |
|
goto out; |
|
} |
|
|
|
cifs_sb->ctx = kzalloc(sizeof(struct smb3_fs_context), GFP_KERNEL); |
|
if (!cifs_sb->ctx) { |
|
root = ERR_PTR(-ENOMEM); |
|
goto out; |
|
} |
|
rc = smb3_fs_context_dup(cifs_sb->ctx, old_ctx); |
|
if (rc) { |
|
root = ERR_PTR(rc); |
|
goto out; |
|
} |
|
|
|
rc = cifs_setup_volume_info(cifs_sb->ctx, NULL, NULL); |
|
if (rc) { |
|
root = ERR_PTR(rc); |
|
goto out; |
|
} |
|
|
|
rc = cifs_setup_cifs_sb(cifs_sb); |
|
if (rc) { |
|
root = ERR_PTR(rc); |
|
goto out; |
|
} |
|
|
|
rc = cifs_mount(cifs_sb, cifs_sb->ctx); |
|
if (rc) { |
|
if (!(flags & SB_SILENT)) |
|
cifs_dbg(VFS, "cifs_mount failed w/return code = %d\n", |
|
rc); |
|
root = ERR_PTR(rc); |
|
goto out; |
|
} |
|
|
|
mnt_data.ctx = cifs_sb->ctx; |
|
mnt_data.cifs_sb = cifs_sb; |
|
mnt_data.flags = flags; |
|
|
|
/* BB should we make this contingent on mount parm? */ |
|
flags |= SB_NODIRATIME | SB_NOATIME; |
|
|
|
sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data); |
|
if (IS_ERR(sb)) { |
|
root = ERR_CAST(sb); |
|
cifs_umount(cifs_sb); |
|
cifs_sb = NULL; |
|
goto out; |
|
} |
|
|
|
if (sb->s_root) { |
|
cifs_dbg(FYI, "Use existing superblock\n"); |
|
cifs_umount(cifs_sb); |
|
cifs_sb = NULL; |
|
} else { |
|
rc = cifs_read_super(sb); |
|
if (rc) { |
|
root = ERR_PTR(rc); |
|
goto out_super; |
|
} |
|
|
|
sb->s_flags |= SB_ACTIVE; |
|
} |
|
|
|
root = cifs_get_root(cifs_sb ? cifs_sb->ctx : old_ctx, sb); |
|
if (IS_ERR(root)) |
|
goto out_super; |
|
|
|
if (cifs_sb) |
|
cifs_sb->root = dget(root); |
|
|
|
cifs_dbg(FYI, "dentry root is: %p\n", root); |
|
return root; |
|
|
|
out_super: |
|
deactivate_locked_super(sb); |
|
out: |
|
if (cifs_sb) { |
|
kfree(cifs_sb->prepath); |
|
smb3_cleanup_fs_context(cifs_sb->ctx); |
|
kfree(cifs_sb); |
|
} |
|
return root; |
|
} |
|
|
|
|
|
static ssize_t |
|
cifs_loose_read_iter(struct kiocb *iocb, struct iov_iter *iter) |
|
{ |
|
ssize_t rc; |
|
struct inode *inode = file_inode(iocb->ki_filp); |
|
|
|
if (iocb->ki_filp->f_flags & O_DIRECT) |
|
return cifs_user_readv(iocb, iter); |
|
|
|
rc = cifs_revalidate_mapping(inode); |
|
if (rc) |
|
return rc; |
|
|
|
return generic_file_read_iter(iocb, iter); |
|
} |
|
|
|
static ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) |
|
{ |
|
struct inode *inode = file_inode(iocb->ki_filp); |
|
struct cifsInodeInfo *cinode = CIFS_I(inode); |
|
ssize_t written; |
|
int rc; |
|
|
|
if (iocb->ki_filp->f_flags & O_DIRECT) { |
|
written = cifs_user_writev(iocb, from); |
|
if (written > 0 && CIFS_CACHE_READ(cinode)) { |
|
cifs_zap_mapping(inode); |
|
cifs_dbg(FYI, |
|
"Set no oplock for inode=%p after a write operation\n", |
|
inode); |
|
cinode->oplock = 0; |
|
} |
|
return written; |
|
} |
|
|
|
written = cifs_get_writer(cinode); |
|
if (written) |
|
return written; |
|
|
|
written = generic_file_write_iter(iocb, from); |
|
|
|
if (CIFS_CACHE_WRITE(CIFS_I(inode))) |
|
goto out; |
|
|
|
rc = filemap_fdatawrite(inode->i_mapping); |
|
if (rc) |
|
cifs_dbg(FYI, "cifs_file_write_iter: %d rc on %p inode\n", |
|
rc, inode); |
|
|
|
out: |
|
cifs_put_writer(cinode); |
|
return written; |
|
} |
|
|
|
static loff_t cifs_llseek(struct file *file, loff_t offset, int whence) |
|
{ |
|
struct cifsFileInfo *cfile = file->private_data; |
|
struct cifs_tcon *tcon; |
|
|
|
/* |
|
* whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate |
|
* the cached file length |
|
*/ |
|
if (whence != SEEK_SET && whence != SEEK_CUR) { |
|
int rc; |
|
struct inode *inode = file_inode(file); |
|
|
|
/* |
|
* We need to be sure that all dirty pages are written and the |
|
* server has the newest file length. |
|
*/ |
|
if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping && |
|
inode->i_mapping->nrpages != 0) { |
|
rc = filemap_fdatawait(inode->i_mapping); |
|
if (rc) { |
|
mapping_set_error(inode->i_mapping, rc); |
|
return rc; |
|
} |
|
} |
|
/* |
|
* Some applications poll for the file length in this strange |
|
* way so we must seek to end on non-oplocked files by |
|
* setting the revalidate time to zero. |
|
*/ |
|
CIFS_I(inode)->time = 0; |
|
|
|
rc = cifs_revalidate_file_attr(file); |
|
if (rc < 0) |
|
return (loff_t)rc; |
|
} |
|
if (cfile && cfile->tlink) { |
|
tcon = tlink_tcon(cfile->tlink); |
|
if (tcon->ses->server->ops->llseek) |
|
return tcon->ses->server->ops->llseek(file, tcon, |
|
offset, whence); |
|
} |
|
return generic_file_llseek(file, offset, whence); |
|
} |
|
|
|
static int |
|
cifs_setlease(struct file *file, long arg, struct file_lock **lease, void **priv) |
|
{ |
|
/* |
|
* Note that this is called by vfs setlease with i_lock held to |
|
* protect *lease from going away. |
|
*/ |
|
struct inode *inode = file_inode(file); |
|
struct cifsFileInfo *cfile = file->private_data; |
|
|
|
if (!(S_ISREG(inode->i_mode))) |
|
return -EINVAL; |
|
|
|
/* Check if file is oplocked if this is request for new lease */ |
|
if (arg == F_UNLCK || |
|
((arg == F_RDLCK) && CIFS_CACHE_READ(CIFS_I(inode))) || |
|
((arg == F_WRLCK) && CIFS_CACHE_WRITE(CIFS_I(inode)))) |
|
return generic_setlease(file, arg, lease, priv); |
|
else if (tlink_tcon(cfile->tlink)->local_lease && |
|
!CIFS_CACHE_READ(CIFS_I(inode))) |
|
/* |
|
* If the server claims to support oplock on this file, then we |
|
* still need to check oplock even if the local_lease mount |
|
* option is set, but there are servers which do not support |
|
* oplock for which this mount option may be useful if the user |
|
* knows that the file won't be changed on the server by anyone |
|
* else. |
|
*/ |
|
return generic_setlease(file, arg, lease, priv); |
|
else |
|
return -EAGAIN; |
|
} |
|
|
|
struct file_system_type cifs_fs_type = { |
|
.owner = THIS_MODULE, |
|
.name = "cifs", |
|
.init_fs_context = smb3_init_fs_context, |
|
.parameters = smb3_fs_parameters, |
|
.kill_sb = cifs_kill_sb, |
|
.fs_flags = FS_RENAME_DOES_D_MOVE, |
|
}; |
|
MODULE_ALIAS_FS("cifs"); |
|
|
|
static struct file_system_type smb3_fs_type = { |
|
.owner = THIS_MODULE, |
|
.name = "smb3", |
|
.init_fs_context = smb3_init_fs_context, |
|
.parameters = smb3_fs_parameters, |
|
.kill_sb = cifs_kill_sb, |
|
.fs_flags = FS_RENAME_DOES_D_MOVE, |
|
}; |
|
MODULE_ALIAS_FS("smb3"); |
|
MODULE_ALIAS("smb3"); |
|
|
|
const struct inode_operations cifs_dir_inode_ops = { |
|
.create = cifs_create, |
|
.atomic_open = cifs_atomic_open, |
|
.lookup = cifs_lookup, |
|
.getattr = cifs_getattr, |
|
.unlink = cifs_unlink, |
|
.link = cifs_hardlink, |
|
.mkdir = cifs_mkdir, |
|
.rmdir = cifs_rmdir, |
|
.rename = cifs_rename2, |
|
.permission = cifs_permission, |
|
.setattr = cifs_setattr, |
|
.symlink = cifs_symlink, |
|
.mknod = cifs_mknod, |
|
.listxattr = cifs_listxattr, |
|
}; |
|
|
|
const struct inode_operations cifs_file_inode_ops = { |
|
.setattr = cifs_setattr, |
|
.getattr = cifs_getattr, |
|
.permission = cifs_permission, |
|
.listxattr = cifs_listxattr, |
|
.fiemap = cifs_fiemap, |
|
}; |
|
|
|
const struct inode_operations cifs_symlink_inode_ops = { |
|
.get_link = cifs_get_link, |
|
.permission = cifs_permission, |
|
.listxattr = cifs_listxattr, |
|
}; |
|
|
|
static loff_t cifs_remap_file_range(struct file *src_file, loff_t off, |
|
struct file *dst_file, loff_t destoff, loff_t len, |
|
unsigned int remap_flags) |
|
{ |
|
struct inode *src_inode = file_inode(src_file); |
|
struct inode *target_inode = file_inode(dst_file); |
|
struct cifsFileInfo *smb_file_src = src_file->private_data; |
|
struct cifsFileInfo *smb_file_target; |
|
struct cifs_tcon *target_tcon; |
|
unsigned int xid; |
|
int rc; |
|
|
|
if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY)) |
|
return -EINVAL; |
|
|
|
cifs_dbg(FYI, "clone range\n"); |
|
|
|
xid = get_xid(); |
|
|
|
if (!src_file->private_data || !dst_file->private_data) { |
|
rc = -EBADF; |
|
cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n"); |
|
goto out; |
|
} |
|
|
|
smb_file_target = dst_file->private_data; |
|
target_tcon = tlink_tcon(smb_file_target->tlink); |
|
|
|
/* |
|
* Note: cifs case is easier than btrfs since server responsible for |
|
* checks for proper open modes and file type and if it wants |
|
* server could even support copy of range where source = target |
|
*/ |
|
lock_two_nondirectories(target_inode, src_inode); |
|
|
|
if (len == 0) |
|
len = src_inode->i_size - off; |
|
|
|
cifs_dbg(FYI, "about to flush pages\n"); |
|
/* should we flush first and last page first */ |
|
truncate_inode_pages_range(&target_inode->i_data, destoff, |
|
PAGE_ALIGN(destoff + len)-1); |
|
|
|
if (target_tcon->ses->server->ops->duplicate_extents) |
|
rc = target_tcon->ses->server->ops->duplicate_extents(xid, |
|
smb_file_src, smb_file_target, off, len, destoff); |
|
else |
|
rc = -EOPNOTSUPP; |
|
|
|
/* force revalidate of size and timestamps of target file now |
|
that target is updated on the server */ |
|
CIFS_I(target_inode)->time = 0; |
|
/* although unlocking in the reverse order from locking is not |
|
strictly necessary here it is a little cleaner to be consistent */ |
|
unlock_two_nondirectories(src_inode, target_inode); |
|
out: |
|
free_xid(xid); |
|
return rc < 0 ? rc : len; |
|
} |
|
|
|
ssize_t cifs_file_copychunk_range(unsigned int xid, |
|
struct file *src_file, loff_t off, |
|
struct file *dst_file, loff_t destoff, |
|
size_t len, unsigned int flags) |
|
{ |
|
struct inode *src_inode = file_inode(src_file); |
|
struct inode *target_inode = file_inode(dst_file); |
|
struct cifsFileInfo *smb_file_src; |
|
struct cifsFileInfo *smb_file_target; |
|
struct cifs_tcon *src_tcon; |
|
struct cifs_tcon *target_tcon; |
|
ssize_t rc; |
|
|
|
cifs_dbg(FYI, "copychunk range\n"); |
|
|
|
if (!src_file->private_data || !dst_file->private_data) { |
|
rc = -EBADF; |
|
cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n"); |
|
goto out; |
|
} |
|
|
|
rc = -EXDEV; |
|
smb_file_target = dst_file->private_data; |
|
smb_file_src = src_file->private_data; |
|
src_tcon = tlink_tcon(smb_file_src->tlink); |
|
target_tcon = tlink_tcon(smb_file_target->tlink); |
|
|
|
if (src_tcon->ses != target_tcon->ses) { |
|
cifs_dbg(VFS, "source and target of copy not on same server\n"); |
|
goto out; |
|
} |
|
|
|
rc = -EOPNOTSUPP; |
|
if (!target_tcon->ses->server->ops->copychunk_range) |
|
goto out; |
|
|
|
/* |
|
* Note: cifs case is easier than btrfs since server responsible for |
|
* checks for proper open modes and file type and if it wants |
|
* server could even support copy of range where source = target |
|
*/ |
|
lock_two_nondirectories(target_inode, src_inode); |
|
|
|
cifs_dbg(FYI, "about to flush pages\n"); |
|
/* should we flush first and last page first */ |
|
truncate_inode_pages(&target_inode->i_data, 0); |
|
|
|
rc = file_modified(dst_file); |
|
if (!rc) |
|
rc = target_tcon->ses->server->ops->copychunk_range(xid, |
|
smb_file_src, smb_file_target, off, len, destoff); |
|
|
|
file_accessed(src_file); |
|
|
|
/* force revalidate of size and timestamps of target file now |
|
* that target is updated on the server |
|
*/ |
|
CIFS_I(target_inode)->time = 0; |
|
/* although unlocking in the reverse order from locking is not |
|
* strictly necessary here it is a little cleaner to be consistent |
|
*/ |
|
unlock_two_nondirectories(src_inode, target_inode); |
|
|
|
out: |
|
return rc; |
|
} |
|
|
|
/* |
|
* Directory operations under CIFS/SMB2/SMB3 are synchronous, so fsync() |
|
* is a dummy operation. |
|
*/ |
|
static int cifs_dir_fsync(struct file *file, loff_t start, loff_t end, int datasync) |
|
{ |
|
cifs_dbg(FYI, "Sync directory - name: %pD datasync: 0x%x\n", |
|
file, datasync); |
|
|
|
return 0; |
|
} |
|
|
|
static ssize_t cifs_copy_file_range(struct file *src_file, loff_t off, |
|
struct file *dst_file, loff_t destoff, |
|
size_t len, unsigned int flags) |
|
{ |
|
unsigned int xid = get_xid(); |
|
ssize_t rc; |
|
struct cifsFileInfo *cfile = dst_file->private_data; |
|
|
|
if (cfile->swapfile) |
|
return -EOPNOTSUPP; |
|
|
|
rc = cifs_file_copychunk_range(xid, src_file, off, dst_file, destoff, |
|
len, flags); |
|
free_xid(xid); |
|
|
|
if (rc == -EOPNOTSUPP || rc == -EXDEV) |
|
rc = generic_copy_file_range(src_file, off, dst_file, |
|
destoff, len, flags); |
|
return rc; |
|
} |
|
|
|
const struct file_operations cifs_file_ops = { |
|
.read_iter = cifs_loose_read_iter, |
|
.write_iter = cifs_file_write_iter, |
|
.open = cifs_open, |
|
.release = cifs_close, |
|
.lock = cifs_lock, |
|
.flock = cifs_flock, |
|
.fsync = cifs_fsync, |
|
.flush = cifs_flush, |
|
.mmap = cifs_file_mmap, |
|
.splice_read = generic_file_splice_read, |
|
.splice_write = iter_file_splice_write, |
|
.llseek = cifs_llseek, |
|
.unlocked_ioctl = cifs_ioctl, |
|
.copy_file_range = cifs_copy_file_range, |
|
.remap_file_range = cifs_remap_file_range, |
|
.setlease = cifs_setlease, |
|
.fallocate = cifs_fallocate, |
|
}; |
|
|
|
const struct file_operations cifs_file_strict_ops = { |
|
.read_iter = cifs_strict_readv, |
|
.write_iter = cifs_strict_writev, |
|
.open = cifs_open, |
|
.release = cifs_close, |
|
.lock = cifs_lock, |
|
.flock = cifs_flock, |
|
.fsync = cifs_strict_fsync, |
|
.flush = cifs_flush, |
|
.mmap = cifs_file_strict_mmap, |
|
.splice_read = generic_file_splice_read, |
|
.splice_write = iter_file_splice_write, |
|
.llseek = cifs_llseek, |
|
.unlocked_ioctl = cifs_ioctl, |
|
.copy_file_range = cifs_copy_file_range, |
|
.remap_file_range = cifs_remap_file_range, |
|
.setlease = cifs_setlease, |
|
.fallocate = cifs_fallocate, |
|
}; |
|
|
|
const struct file_operations cifs_file_direct_ops = { |
|
.read_iter = cifs_direct_readv, |
|
.write_iter = cifs_direct_writev, |
|
.open = cifs_open, |
|
.release = cifs_close, |
|
.lock = cifs_lock, |
|
.flock = cifs_flock, |
|
.fsync = cifs_fsync, |
|
.flush = cifs_flush, |
|
.mmap = cifs_file_mmap, |
|
.splice_read = generic_file_splice_read, |
|
.splice_write = iter_file_splice_write, |
|
.unlocked_ioctl = cifs_ioctl, |
|
.copy_file_range = cifs_copy_file_range, |
|
.remap_file_range = cifs_remap_file_range, |
|
.llseek = cifs_llseek, |
|
.setlease = cifs_setlease, |
|
.fallocate = cifs_fallocate, |
|
}; |
|
|
|
const struct file_operations cifs_file_nobrl_ops = { |
|
.read_iter = cifs_loose_read_iter, |
|
.write_iter = cifs_file_write_iter, |
|
.open = cifs_open, |
|
.release = cifs_close, |
|
.fsync = cifs_fsync, |
|
.flush = cifs_flush, |
|
.mmap = cifs_file_mmap, |
|
.splice_read = generic_file_splice_read, |
|
.splice_write = iter_file_splice_write, |
|
.llseek = cifs_llseek, |
|
.unlocked_ioctl = cifs_ioctl, |
|
.copy_file_range = cifs_copy_file_range, |
|
.remap_file_range = cifs_remap_file_range, |
|
.setlease = cifs_setlease, |
|
.fallocate = cifs_fallocate, |
|
}; |
|
|
|
const struct file_operations cifs_file_strict_nobrl_ops = { |
|
.read_iter = cifs_strict_readv, |
|
.write_iter = cifs_strict_writev, |
|
.open = cifs_open, |
|
.release = cifs_close, |
|
.fsync = cifs_strict_fsync, |
|
.flush = cifs_flush, |
|
.mmap = cifs_file_strict_mmap, |
|
.splice_read = generic_file_splice_read, |
|
.splice_write = iter_file_splice_write, |
|
.llseek = cifs_llseek, |
|
.unlocked_ioctl = cifs_ioctl, |
|
.copy_file_range = cifs_copy_file_range, |
|
.remap_file_range = cifs_remap_file_range, |
|
.setlease = cifs_setlease, |
|
.fallocate = cifs_fallocate, |
|
}; |
|
|
|
const struct file_operations cifs_file_direct_nobrl_ops = { |
|
.read_iter = cifs_direct_readv, |
|
.write_iter = cifs_direct_writev, |
|
.open = cifs_open, |
|
.release = cifs_close, |
|
.fsync = cifs_fsync, |
|
.flush = cifs_flush, |
|
.mmap = cifs_file_mmap, |
|
.splice_read = generic_file_splice_read, |
|
.splice_write = iter_file_splice_write, |
|
.unlocked_ioctl = cifs_ioctl, |
|
.copy_file_range = cifs_copy_file_range, |
|
.remap_file_range = cifs_remap_file_range, |
|
.llseek = cifs_llseek, |
|
.setlease = cifs_setlease, |
|
.fallocate = cifs_fallocate, |
|
}; |
|
|
|
const struct file_operations cifs_dir_ops = { |
|
.iterate_shared = cifs_readdir, |
|
.release = cifs_closedir, |
|
.read = generic_read_dir, |
|
.unlocked_ioctl = cifs_ioctl, |
|
.copy_file_range = cifs_copy_file_range, |
|
.remap_file_range = cifs_remap_file_range, |
|
.llseek = generic_file_llseek, |
|
.fsync = cifs_dir_fsync, |
|
}; |
|
|
|
static void |
|
cifs_init_once(void *inode) |
|
{ |
|
struct cifsInodeInfo *cifsi = inode; |
|
|
|
inode_init_once(&cifsi->vfs_inode); |
|
init_rwsem(&cifsi->lock_sem); |
|
} |
|
|
|
static int __init |
|
cifs_init_inodecache(void) |
|
{ |
|
cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", |
|
sizeof(struct cifsInodeInfo), |
|
0, (SLAB_RECLAIM_ACCOUNT| |
|
SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
|
cifs_init_once); |
|
if (cifs_inode_cachep == NULL) |
|
return -ENOMEM; |
|
|
|
return 0; |
|
} |
|
|
|
static void |
|
cifs_destroy_inodecache(void) |
|
{ |
|
/* |
|
* Make sure all delayed rcu free inodes are flushed before we |
|
* destroy cache. |
|
*/ |
|
rcu_barrier(); |
|
kmem_cache_destroy(cifs_inode_cachep); |
|
} |
|
|
|
static int |
|
cifs_init_request_bufs(void) |
|
{ |
|
/* |
|
* SMB2 maximum header size is bigger than CIFS one - no problems to |
|
* allocate some more bytes for CIFS. |
|
*/ |
|
size_t max_hdr_size = MAX_SMB2_HDR_SIZE; |
|
|
|
if (CIFSMaxBufSize < 8192) { |
|
/* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
|
Unicode path name has to fit in any SMB/CIFS path based frames */ |
|
CIFSMaxBufSize = 8192; |
|
} else if (CIFSMaxBufSize > 1024*127) { |
|
CIFSMaxBufSize = 1024 * 127; |
|
} else { |
|
CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ |
|
} |
|
/* |
|
cifs_dbg(VFS, "CIFSMaxBufSize %d 0x%x\n", |
|
CIFSMaxBufSize, CIFSMaxBufSize); |
|
*/ |
|
cifs_req_cachep = kmem_cache_create_usercopy("cifs_request", |
|
CIFSMaxBufSize + max_hdr_size, 0, |
|
SLAB_HWCACHE_ALIGN, 0, |
|
CIFSMaxBufSize + max_hdr_size, |
|
NULL); |
|
if (cifs_req_cachep == NULL) |
|
return -ENOMEM; |
|
|
|
if (cifs_min_rcv < 1) |
|
cifs_min_rcv = 1; |
|
else if (cifs_min_rcv > 64) { |
|
cifs_min_rcv = 64; |
|
cifs_dbg(VFS, "cifs_min_rcv set to maximum (64)\n"); |
|
} |
|
|
|
cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
|
cifs_req_cachep); |
|
|
|
if (cifs_req_poolp == NULL) { |
|
kmem_cache_destroy(cifs_req_cachep); |
|
return -ENOMEM; |
|
} |
|
/* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
|
almost all handle based requests (but not write response, nor is it |
|
sufficient for path based requests). A smaller size would have |
|
been more efficient (compacting multiple slab items on one 4k page) |
|
for the case in which debug was on, but this larger size allows |
|
more SMBs to use small buffer alloc and is still much more |
|
efficient to alloc 1 per page off the slab compared to 17K (5page) |
|
alloc of large cifs buffers even when page debugging is on */ |
|
cifs_sm_req_cachep = kmem_cache_create_usercopy("cifs_small_rq", |
|
MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
|
0, MAX_CIFS_SMALL_BUFFER_SIZE, NULL); |
|
if (cifs_sm_req_cachep == NULL) { |
|
mempool_destroy(cifs_req_poolp); |
|
kmem_cache_destroy(cifs_req_cachep); |
|
return -ENOMEM; |
|
} |
|
|
|
if (cifs_min_small < 2) |
|
cifs_min_small = 2; |
|
else if (cifs_min_small > 256) { |
|
cifs_min_small = 256; |
|
cifs_dbg(FYI, "cifs_min_small set to maximum (256)\n"); |
|
} |
|
|
|
cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
|
cifs_sm_req_cachep); |
|
|
|
if (cifs_sm_req_poolp == NULL) { |
|
mempool_destroy(cifs_req_poolp); |
|
kmem_cache_destroy(cifs_req_cachep); |
|
kmem_cache_destroy(cifs_sm_req_cachep); |
|
return -ENOMEM; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void |
|
cifs_destroy_request_bufs(void) |
|
{ |
|
mempool_destroy(cifs_req_poolp); |
|
kmem_cache_destroy(cifs_req_cachep); |
|
mempool_destroy(cifs_sm_req_poolp); |
|
kmem_cache_destroy(cifs_sm_req_cachep); |
|
} |
|
|
|
static int |
|
cifs_init_mids(void) |
|
{ |
|
cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", |
|
sizeof(struct mid_q_entry), 0, |
|
SLAB_HWCACHE_ALIGN, NULL); |
|
if (cifs_mid_cachep == NULL) |
|
return -ENOMEM; |
|
|
|
/* 3 is a reasonable minimum number of simultaneous operations */ |
|
cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); |
|
if (cifs_mid_poolp == NULL) { |
|
kmem_cache_destroy(cifs_mid_cachep); |
|
return -ENOMEM; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void |
|
cifs_destroy_mids(void) |
|
{ |
|
mempool_destroy(cifs_mid_poolp); |
|
kmem_cache_destroy(cifs_mid_cachep); |
|
} |
|
|
|
static int __init |
|
init_cifs(void) |
|
{ |
|
int rc = 0; |
|
cifs_proc_init(); |
|
INIT_LIST_HEAD(&cifs_tcp_ses_list); |
|
/* |
|
* Initialize Global counters |
|
*/ |
|
atomic_set(&sesInfoAllocCount, 0); |
|
atomic_set(&tconInfoAllocCount, 0); |
|
atomic_set(&tcpSesNextId, 0); |
|
atomic_set(&tcpSesAllocCount, 0); |
|
atomic_set(&tcpSesReconnectCount, 0); |
|
atomic_set(&tconInfoReconnectCount, 0); |
|
|
|
atomic_set(&bufAllocCount, 0); |
|
atomic_set(&smBufAllocCount, 0); |
|
#ifdef CONFIG_CIFS_STATS2 |
|
atomic_set(&totBufAllocCount, 0); |
|
atomic_set(&totSmBufAllocCount, 0); |
|
if (slow_rsp_threshold < 1) |
|
cifs_dbg(FYI, "slow_response_threshold msgs disabled\n"); |
|
else if (slow_rsp_threshold > 32767) |
|
cifs_dbg(VFS, |
|
"slow response threshold set higher than recommended (0 to 32767)\n"); |
|
#endif /* CONFIG_CIFS_STATS2 */ |
|
|
|
atomic_set(&midCount, 0); |
|
GlobalCurrentXid = 0; |
|
GlobalTotalActiveXid = 0; |
|
GlobalMaxActiveXid = 0; |
|
spin_lock_init(&cifs_tcp_ses_lock); |
|
spin_lock_init(&GlobalMid_Lock); |
|
|
|
cifs_lock_secret = get_random_u32(); |
|
|
|
if (cifs_max_pending < 2) { |
|
cifs_max_pending = 2; |
|
cifs_dbg(FYI, "cifs_max_pending set to min of 2\n"); |
|
} else if (cifs_max_pending > CIFS_MAX_REQ) { |
|
cifs_max_pending = CIFS_MAX_REQ; |
|
cifs_dbg(FYI, "cifs_max_pending set to max of %u\n", |
|
CIFS_MAX_REQ); |
|
} |
|
|
|
cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); |
|
if (!cifsiod_wq) { |
|
rc = -ENOMEM; |
|
goto out_clean_proc; |
|
} |
|
|
|
/* |
|
* Consider in future setting limit!=0 maybe to min(num_of_cores - 1, 3) |
|
* so that we don't launch too many worker threads but |
|
* Documentation/core-api/workqueue.rst recommends setting it to 0 |
|
*/ |
|
|
|
/* WQ_UNBOUND allows decrypt tasks to run on any CPU */ |
|
decrypt_wq = alloc_workqueue("smb3decryptd", |
|
WQ_UNBOUND|WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); |
|
if (!decrypt_wq) { |
|
rc = -ENOMEM; |
|
goto out_destroy_cifsiod_wq; |
|
} |
|
|
|
fileinfo_put_wq = alloc_workqueue("cifsfileinfoput", |
|
WQ_UNBOUND|WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); |
|
if (!fileinfo_put_wq) { |
|
rc = -ENOMEM; |
|
goto out_destroy_decrypt_wq; |
|
} |
|
|
|
cifsoplockd_wq = alloc_workqueue("cifsoplockd", |
|
WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); |
|
if (!cifsoplockd_wq) { |
|
rc = -ENOMEM; |
|
goto out_destroy_fileinfo_put_wq; |
|
} |
|
|
|
deferredclose_wq = alloc_workqueue("deferredclose", |
|
WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); |
|
if (!deferredclose_wq) { |
|
rc = -ENOMEM; |
|
goto out_destroy_cifsoplockd_wq; |
|
} |
|
|
|
rc = cifs_fscache_register(); |
|
if (rc) |
|
goto out_destroy_deferredclose_wq; |
|
|
|
rc = cifs_init_inodecache(); |
|
if (rc) |
|
goto out_unreg_fscache; |
|
|
|
rc = cifs_init_mids(); |
|
if (rc) |
|
goto out_destroy_inodecache; |
|
|
|
rc = cifs_init_request_bufs(); |
|
if (rc) |
|
goto out_destroy_mids; |
|
|
|
#ifdef CONFIG_CIFS_DFS_UPCALL |
|
rc = dfs_cache_init(); |
|
if (rc) |
|
goto out_destroy_request_bufs; |
|
#endif /* CONFIG_CIFS_DFS_UPCALL */ |
|
#ifdef CONFIG_CIFS_UPCALL |
|
rc = init_cifs_spnego(); |
|
if (rc) |
|
goto out_destroy_dfs_cache; |
|
#endif /* CONFIG_CIFS_UPCALL */ |
|
#ifdef CONFIG_CIFS_SWN_UPCALL |
|
rc = cifs_genl_init(); |
|
if (rc) |
|
goto out_register_key_type; |
|
#endif /* CONFIG_CIFS_SWN_UPCALL */ |
|
|
|
rc = init_cifs_idmap(); |
|
if (rc) |
|
goto out_cifs_swn_init; |
|
|
|
rc = register_filesystem(&cifs_fs_type); |
|
if (rc) |
|
goto out_init_cifs_idmap; |
|
|
|
rc = register_filesystem(&smb3_fs_type); |
|
if (rc) { |
|
unregister_filesystem(&cifs_fs_type); |
|
goto out_init_cifs_idmap; |
|
} |
|
|
|
return 0; |
|
|
|
out_init_cifs_idmap: |
|
exit_cifs_idmap(); |
|
out_cifs_swn_init: |
|
#ifdef CONFIG_CIFS_SWN_UPCALL |
|
cifs_genl_exit(); |
|
out_register_key_type: |
|
#endif |
|
#ifdef CONFIG_CIFS_UPCALL |
|
exit_cifs_spnego(); |
|
out_destroy_dfs_cache: |
|
#endif |
|
#ifdef CONFIG_CIFS_DFS_UPCALL |
|
dfs_cache_destroy(); |
|
out_destroy_request_bufs: |
|
#endif |
|
cifs_destroy_request_bufs(); |
|
out_destroy_mids: |
|
cifs_destroy_mids(); |
|
out_destroy_inodecache: |
|
cifs_destroy_inodecache(); |
|
out_unreg_fscache: |
|
cifs_fscache_unregister(); |
|
out_destroy_deferredclose_wq: |
|
destroy_workqueue(deferredclose_wq); |
|
out_destroy_cifsoplockd_wq: |
|
destroy_workqueue(cifsoplockd_wq); |
|
out_destroy_fileinfo_put_wq: |
|
destroy_workqueue(fileinfo_put_wq); |
|
out_destroy_decrypt_wq: |
|
destroy_workqueue(decrypt_wq); |
|
out_destroy_cifsiod_wq: |
|
destroy_workqueue(cifsiod_wq); |
|
out_clean_proc: |
|
cifs_proc_clean(); |
|
return rc; |
|
} |
|
|
|
static void __exit |
|
exit_cifs(void) |
|
{ |
|
cifs_dbg(NOISY, "exit_smb3\n"); |
|
unregister_filesystem(&cifs_fs_type); |
|
unregister_filesystem(&smb3_fs_type); |
|
cifs_dfs_release_automount_timer(); |
|
exit_cifs_idmap(); |
|
#ifdef CONFIG_CIFS_SWN_UPCALL |
|
cifs_genl_exit(); |
|
#endif |
|
#ifdef CONFIG_CIFS_UPCALL |
|
exit_cifs_spnego(); |
|
#endif |
|
#ifdef CONFIG_CIFS_DFS_UPCALL |
|
dfs_cache_destroy(); |
|
#endif |
|
cifs_destroy_request_bufs(); |
|
cifs_destroy_mids(); |
|
cifs_destroy_inodecache(); |
|
cifs_fscache_unregister(); |
|
destroy_workqueue(deferredclose_wq); |
|
destroy_workqueue(cifsoplockd_wq); |
|
destroy_workqueue(decrypt_wq); |
|
destroy_workqueue(fileinfo_put_wq); |
|
destroy_workqueue(cifsiod_wq); |
|
cifs_proc_clean(); |
|
} |
|
|
|
MODULE_AUTHOR("Steve French"); |
|
MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
|
MODULE_DESCRIPTION |
|
("VFS to access SMB3 servers e.g. Samba, Macs, Azure and Windows (and " |
|
"also older servers complying with the SNIA CIFS Specification)"); |
|
MODULE_VERSION(CIFS_VERSION); |
|
MODULE_SOFTDEP("ecb"); |
|
MODULE_SOFTDEP("hmac"); |
|
MODULE_SOFTDEP("md4"); |
|
MODULE_SOFTDEP("md5"); |
|
MODULE_SOFTDEP("nls"); |
|
MODULE_SOFTDEP("aes"); |
|
MODULE_SOFTDEP("cmac"); |
|
MODULE_SOFTDEP("sha256"); |
|
MODULE_SOFTDEP("sha512"); |
|
MODULE_SOFTDEP("aead2"); |
|
MODULE_SOFTDEP("ccm"); |
|
MODULE_SOFTDEP("gcm"); |
|
module_init(init_cifs) |
|
module_exit(exit_cifs)
|
|
|