Commit 87dbe42a authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "Including:

   - nine bug fixes for stable. Some of these we found at the recent two
     weeks of SMB3 test events/plugfests.

   - significant improvements in reconnection (e.g. if server or network
     crashes) especially when mounted with "persistenthandles" or to
     server which advertises Continuous Availability on the share.

   - a new mount option "idsfromsid" which improves POSIX compatibility
     in some cases (when winbind not configured e.g.) by better (and
     faster) fetching uid/gid from acl (when "cifsacl" mount option is
     enabled). NB: we are almost complete work on "cifsacl" (querying
     mode/uid/gid from ACL) for SMB3, but SMB3 support for cifsacl is
     not included in this set.

   - improved handling for SMB3 "credits" (even if server is buggy)

  Still working on two sets of changes:

   - cifsacl enablement for SMB3

   - cleanup of RFC1001 length calculation (so we can handle encryption
     and multichannel and RDMA)

  And a couple of new bugs were reported recently (unrelated to above)
  so will probably have another merge request next week"

* 'for-next' of git://git.samba.org/sfrench/cifs-2.6: (21 commits)
  CIFS: Retrieve uid and gid from special sid if enabled
  CIFS: Add new mount option to set owner uid and gid from special sids in acl
  CIFS: Reset read oplock to NONE if we have mandatory locks after reopen
  CIFS: Fix persistent handles re-opening on reconnect
  SMB2: Separate RawNTLMSSP authentication from SMB2_sess_setup
  SMB2: Separate Kerberos authentication from SMB2_sess_setup
  Expose cifs module parameters in sysfs
  Cleanup missing frees on some ioctls
  Enable previous version support
  Do not send SMB3 SET_INFO request if nothing is changing
  SMB3: Add mount parameter to allow user to override max credits
  fs/cifs: reopen persistent handles on reconnect
  Clarify locking of cifs file and tcon structures and make more granular
  Fix regression which breaks DFS mounting
  fs/cifs: keep guid when assigning fid to fileinfo
  SMB3: GUIDs should be constructed as random but valid uuids
  Set previous session id correctly on SMB3 reconnect
  cifs: Limit the overall credit acquired
  Display number of credits available
  Add way to query creation time of file via cifs xattr
  ...
parents d3304cad 3514de3f
......@@ -152,6 +152,7 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
list_for_each(tmp1, &cifs_tcp_ses_list) {
server = list_entry(tmp1, struct TCP_Server_Info,
tcp_ses_list);
seq_printf(m, "\nNumber of credits: %d", server->credits);
i++;
list_for_each(tmp2, &server->smb_ses_list) {
ses = list_entry(tmp2, struct cifs_ses,
......
......@@ -49,6 +49,7 @@
#define CIFS_MOUNT_USE_PREFIX_PATH 0x1000000 /* make subpath with unaccessible
* root mountable
*/
#define CIFS_MOUNT_UID_FROM_ACL 0x2000000 /* try to get UID via special SID */
struct cifs_sb_info {
struct rb_root tlink_tree;
......
......@@ -36,7 +36,15 @@ struct smb_mnt_fs_info {
__u64 cifs_posix_caps;
} __packed;
struct smb_snapshot_array {
__u32 number_of_snapshots;
__u32 number_of_snapshots_returned;
__u32 snapshot_array_size;
/* snapshots[]; */
} __packed;
#define CIFS_IOCTL_MAGIC 0xCF
#define CIFS_IOC_COPYCHUNK_FILE _IOW(CIFS_IOCTL_MAGIC, 3, int)
#define CIFS_IOC_SET_INTEGRITY _IO(CIFS_IOCTL_MAGIC, 4)
#define CIFS_IOC_GET_MNT_INFO _IOR(CIFS_IOCTL_MAGIC, 5, struct smb_mnt_fs_info)
#define CIFS_ENUMERATE_SNAPSHOTS _IOR(CIFS_IOCTL_MAGIC, 6, struct smb_snapshot_array)
......@@ -42,6 +42,35 @@ static const struct cifs_sid sid_authusers = {
/* group users */
static const struct cifs_sid sid_user = {1, 2 , {0, 0, 0, 0, 0, 5}, {} };
/* S-1-22-1 Unmapped Unix users */
static const struct cifs_sid sid_unix_users = {1, 1, {0, 0, 0, 0, 0, 22},
{cpu_to_le32(1), 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} };
/* S-1-22-2 Unmapped Unix groups */
static const struct cifs_sid sid_unix_groups = { 1, 1, {0, 0, 0, 0, 0, 22},
{cpu_to_le32(2), 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} };
/*
* See http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx
*/
/* S-1-5-88 MS NFS and Apple style UID/GID/mode */
/* S-1-5-88-1 Unix uid */
static const struct cifs_sid sid_unix_NFS_users = { 1, 2, {0, 0, 0, 0, 0, 5},
{cpu_to_le32(88),
cpu_to_le32(1), 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} };
/* S-1-5-88-2 Unix gid */
static const struct cifs_sid sid_unix_NFS_groups = { 1, 2, {0, 0, 0, 0, 0, 5},
{cpu_to_le32(88),
cpu_to_le32(2), 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} };
/* S-1-5-88-3 Unix mode */
static const struct cifs_sid sid_unix_NFS_mode = { 1, 2, {0, 0, 0, 0, 0, 5},
{cpu_to_le32(88),
cpu_to_le32(3), 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} };
static const struct cred *root_cred;
static int
......@@ -183,6 +212,62 @@ compare_sids(const struct cifs_sid *ctsid, const struct cifs_sid *cwsid)
return 0; /* sids compare/match */
}
static bool
is_well_known_sid(const struct cifs_sid *psid, uint32_t *puid, bool is_group)
{
int i;
int num_subauth;
const struct cifs_sid *pwell_known_sid;
if (!psid || (puid == NULL))
return false;
num_subauth = psid->num_subauth;
/* check if Mac (or Windows NFS) vs. Samba format for Unix owner SID */
if (num_subauth == 2) {
if (is_group)
pwell_known_sid = &sid_unix_groups;
else
pwell_known_sid = &sid_unix_users;
} else if (num_subauth == 3) {
if (is_group)
pwell_known_sid = &sid_unix_NFS_groups;
else
pwell_known_sid = &sid_unix_NFS_users;
} else
return false;
/* compare the revision */
if (psid->revision != pwell_known_sid->revision)
return false;
/* compare all of the six auth values */
for (i = 0; i < NUM_AUTHS; ++i) {
if (psid->authority[i] != pwell_known_sid->authority[i]) {
cifs_dbg(FYI, "auth %d did not match\n", i);
return false;
}
}
if (num_subauth == 2) {
if (psid->sub_auth[0] != pwell_known_sid->sub_auth[0])
return false;
*puid = le32_to_cpu(psid->sub_auth[1]);
} else /* 3 subauths, ie Windows/Mac style */ {
*puid = le32_to_cpu(psid->sub_auth[0]);
if ((psid->sub_auth[0] != pwell_known_sid->sub_auth[0]) ||
(psid->sub_auth[1] != pwell_known_sid->sub_auth[1]))
return false;
*puid = le32_to_cpu(psid->sub_auth[2]);
}
cifs_dbg(FYI, "Unix UID %d returned from SID\n", *puid);
return true; /* well known sid found, uid returned */
}
static void
cifs_copy_sid(struct cifs_sid *dst, const struct cifs_sid *src)
{
......@@ -276,6 +361,43 @@ sid_to_id(struct cifs_sb_info *cifs_sb, struct cifs_sid *psid,
return -EIO;
}
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL) {
uint32_t unix_id;
bool is_group;
if (sidtype != SIDOWNER)
is_group = true;
else
is_group = false;
if (is_well_known_sid(psid, &unix_id, is_group) == false)
goto try_upcall_to_get_id;
if (is_group) {
kgid_t gid;
gid_t id;
id = (gid_t)unix_id;
gid = make_kgid(&init_user_ns, id);
if (gid_valid(gid)) {
fgid = gid;
goto got_valid_id;
}
} else {
kuid_t uid;
uid_t id;
id = (uid_t)unix_id;
uid = make_kuid(&init_user_ns, id);
if (uid_valid(uid)) {
fuid = uid;
goto got_valid_id;
}
}
/* If unable to find uid/gid easily from SID try via upcall */
}
try_upcall_to_get_id:
sidstr = sid_to_key_str(psid, sidtype);
if (!sidstr)
return -ENOMEM;
......@@ -329,6 +451,7 @@ sid_to_id(struct cifs_sb_info *cifs_sb, struct cifs_sid *psid,
* Note that we return 0 here unconditionally. If the mapping
* fails then we just fall back to using the mnt_uid/mnt_gid.
*/
got_valid_id:
if (sidtype == SIDOWNER)
fattr->cf_uid = fuid;
else
......
......@@ -64,15 +64,15 @@ unsigned int global_secflags = CIFSSEC_DEF;
unsigned int sign_CIFS_PDUs = 1;
static const struct super_operations cifs_super_ops;
unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
module_param(CIFSMaxBufSize, uint, 0);
module_param(CIFSMaxBufSize, uint, 0444);
MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). "
"Default: 16384 Range: 8192 to 130048");
unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
module_param(cifs_min_rcv, uint, 0);
module_param(cifs_min_rcv, uint, 0444);
MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
"1 to 64");
unsigned int cifs_min_small = 30;
module_param(cifs_min_small, uint, 0);
module_param(cifs_min_small, uint, 0444);
MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
"Range: 2 to 256");
unsigned int cifs_max_pending = CIFS_MAX_REQ;
......@@ -271,7 +271,7 @@ cifs_alloc_inode(struct super_block *sb)
cifs_inode->createtime = 0;
cifs_inode->epoch = 0;
#ifdef CONFIG_CIFS_SMB2
get_random_bytes(cifs_inode->lease_key, SMB2_LEASE_KEY_SIZE);
generate_random_uuid(cifs_inode->lease_key);
#endif
/*
* Can not set i_flags here - they get immediately overwritten to zero
......@@ -469,6 +469,8 @@ cifs_show_options(struct seq_file *s, struct dentry *root)
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)
......@@ -1262,7 +1264,6 @@ init_cifs(void)
GlobalTotalActiveXid = 0;
GlobalMaxActiveXid = 0;
spin_lock_init(&cifs_tcp_ses_lock);
spin_lock_init(&cifs_file_list_lock);
spin_lock_init(&GlobalMid_Lock);
get_random_bytes(&cifs_lock_secret, sizeof(cifs_lock_secret));
......
......@@ -75,6 +75,18 @@
#define SMB_ECHO_INTERVAL_MAX 600
#define SMB_ECHO_INTERVAL_DEFAULT 60
/*
* Default number of credits to keep available for SMB3.
* This value is chosen somewhat arbitrarily. The Windows client
* defaults to 128 credits, the Windows server allows clients up to
* 512 credits (or 8K for later versions), and the NetApp server
* does not limit clients at all. Choose a high enough default value
* such that the client shouldn't limit performance, but allow mount
* to override (until you approach 64K, where we limit credits to 65000
* to reduce possibility of seeing more server credit overflow bugs.
*/
#define SMB2_MAX_CREDITS_AVAILABLE 32000
#include "cifspdu.h"
#ifndef XATTR_DOS_ATTRIB
......@@ -376,6 +388,8 @@ struct smb_version_operations {
int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *);
int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
struct cifsFileInfo *src_file);
int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
struct cifsFileInfo *src_file, void __user *);
int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
struct cifs_sb_info *, const unsigned char *,
char *, unsigned int *);
......@@ -464,6 +478,7 @@ struct smb_vol {
bool retry:1;
bool intr:1;
bool setuids:1;
bool setuidfromacl:1;
bool override_uid:1;
bool override_gid:1;
bool dynperm:1;
......@@ -510,6 +525,7 @@ struct smb_vol {
struct sockaddr_storage srcaddr; /* allow binding to a local IP */
struct nls_table *local_nls;
unsigned int echo_interval; /* echo interval in secs */
unsigned int max_credits; /* smb3 max_credits 10 < credits < 60000 */
};
#define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
......@@ -567,7 +583,8 @@ struct TCP_Server_Info {
bool noblocksnd; /* use blocking sendmsg */
bool noautotune; /* do not autotune send buf sizes */
bool tcp_nodelay;
int credits; /* send no more requests at once */
unsigned int credits; /* send no more requests at once */
unsigned int max_credits; /* can override large 32000 default at mnt */
unsigned int in_flight; /* number of requests on the wire to server */
spinlock_t req_lock; /* protect the two values above */
struct mutex srv_mutex;
......@@ -833,6 +850,7 @@ struct cifs_tcon {
struct list_head tcon_list;
int tc_count;
struct list_head openFileList;
spinlock_t open_file_lock; /* protects list above */
struct cifs_ses *ses; /* pointer to session associated with */
char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
char *nativeFileSystem;
......@@ -889,7 +907,7 @@ struct cifs_tcon {
#endif /* CONFIG_CIFS_STATS2 */
__u64 bytes_read;
__u64 bytes_written;
spinlock_t stat_lock;
spinlock_t stat_lock; /* protects the two fields above */
#endif /* CONFIG_CIFS_STATS */
FILE_SYSTEM_DEVICE_INFO fsDevInfo;
FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
......@@ -1040,20 +1058,24 @@ struct cifs_fid_locks {
};
struct cifsFileInfo {
/* following two lists are protected by tcon->open_file_lock */
struct list_head tlist; /* pointer to next fid owned by tcon */
struct list_head flist; /* next fid (file instance) for this inode */
/* lock list below protected by cifsi->lock_sem */
struct cifs_fid_locks *llist; /* brlocks held by this fid */
kuid_t uid; /* allows finding which FileInfo structure */
__u32 pid; /* process id who opened file */
struct cifs_fid fid; /* file id from remote */
struct list_head rlist; /* reconnect list */
/* BB add lock scope info here if needed */ ;
/* lock scope id (0 if none) */
struct dentry *dentry;
unsigned int f_flags;
struct tcon_link *tlink;
unsigned int f_flags;
bool invalidHandle:1; /* file closed via session abend */
bool oplock_break_cancelled:1;
int count; /* refcount protected by cifs_file_list_lock */
int count;
spinlock_t file_info_lock; /* protects four flag/count fields above */
struct mutex fh_mutex; /* prevents reopen race after dead ses*/
struct cifs_search_info srch_inf;
struct work_struct oplock_break; /* work for oplock breaks */
......@@ -1120,7 +1142,7 @@ struct cifs_writedata {
/*
* Take a reference on the file private data. Must be called with
* cifs_file_list_lock held.
* cfile->file_info_lock held.
*/
static inline void
cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
......@@ -1514,8 +1536,10 @@ require use of the stronger protocol */
* GlobalMid_Lock protects:
* list operations on pending_mid_q and oplockQ
* updates to XID counters, multiplex id and SMB sequence numbers
* cifs_file_list_lock protects:
* list operations on tcp and SMB session lists and tCon lists
* tcp_ses_lock protects:
* list operations on tcp and SMB session lists
* tcon->open_file_lock protects the list of open files hanging off the tcon
* cfile->file_info_lock protects counters and fields in cifs file struct
* f_owner.lock protects certain per file struct operations
* mapping->page_lock protects certain per page operations
*
......@@ -1547,18 +1571,12 @@ GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
* tcp session, and the list of tcon's per smb session. It also protects
* the reference counters for the server, smb session, and tcon. Finally,
* changes to the tcon->tidStatus should be done while holding this lock.
* generally the locks should be taken in order tcp_ses_lock before
* tcon->open_file_lock and that before file->file_info_lock since the
* structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
*/
GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
/*
* This lock protects the cifs_file->llist and cifs_file->flist
* list operations, and updates to some flags (cifs_file->invalidHandle)
* It will be moved to either use the tcon->stat_lock or equivalent later.
* If cifs_tcp_ses_lock and the lock below are both needed to be held, then
* the cifs_tcp_ses_lock must be grabbed first and released last.
*/
GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
/* Outstanding dir notify requests */
GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
......
......@@ -193,6 +193,8 @@ extern struct smb_vol *cifs_get_volume_info(char *mount_data,
extern int cifs_mount(struct cifs_sb_info *, struct smb_vol *);
extern void cifs_umount(struct cifs_sb_info *);
extern void cifs_mark_open_files_invalid(struct cifs_tcon *tcon);
extern void cifs_reopen_persistent_handles(struct cifs_tcon *tcon);
extern bool cifs_find_lock_conflict(struct cifsFileInfo *cfile, __u64 offset,
__u64 length, __u8 type,
struct cifsLockInfo **conf_lock,
......
......@@ -98,13 +98,13 @@ cifs_mark_open_files_invalid(struct cifs_tcon *tcon)
struct list_head *tmp1;
/* list all files open on tree connection and mark them invalid */
spin_lock(&cifs_file_list_lock);
spin_lock(&tcon->open_file_lock);
list_for_each_safe(tmp, tmp1, &tcon->openFileList) {
open_file = list_entry(tmp, struct cifsFileInfo, tlist);
open_file->invalidHandle = true;
open_file->oplock_break_cancelled = true;
}
spin_unlock(&cifs_file_list_lock);
spin_unlock(&tcon->open_file_lock);
/*
* BB Add call to invalidate_inodes(sb) for all superblocks mounted
* to this tcon.
......
......@@ -63,7 +63,6 @@ extern mempool_t *cifs_req_poolp;
#define TLINK_IDLE_EXPIRE (600 * HZ)
enum {
/* Mount options that take no arguments */
Opt_user_xattr, Opt_nouser_xattr,
Opt_forceuid, Opt_noforceuid,
......@@ -76,7 +75,7 @@ enum {
Opt_noposixpaths, Opt_nounix,
Opt_nocase,
Opt_brl, Opt_nobrl,
Opt_forcemandatorylock, Opt_setuids,
Opt_forcemandatorylock, Opt_setuidfromacl, Opt_setuids,
Opt_nosetuids, Opt_dynperm, Opt_nodynperm,
Opt_nohard, Opt_nosoft,
Opt_nointr, Opt_intr,
......@@ -95,7 +94,7 @@ enum {
Opt_cruid, Opt_gid, Opt_file_mode,
Opt_dirmode, Opt_port,
Opt_rsize, Opt_wsize, Opt_actimeo,
Opt_echo_interval,
Opt_echo_interval, Opt_max_credits,
/* Mount options which take string value */
Opt_user, Opt_pass, Opt_ip,
......@@ -148,6 +147,7 @@ static const match_table_t cifs_mount_option_tokens = {
{ Opt_forcemandatorylock, "forcemand" },
{ Opt_setuids, "setuids" },
{ Opt_nosetuids, "nosetuids" },
{ Opt_setuidfromacl, "idsfromsid" },
{ Opt_dynperm, "dynperm" },
{ Opt_nodynperm, "nodynperm" },
{ Opt_nohard, "nohard" },
......@@ -190,6 +190,7 @@ static const match_table_t cifs_mount_option_tokens = {
{ Opt_wsize, "wsize=%s" },
{ Opt_actimeo, "actimeo=%s" },
{ Opt_echo_interval, "echo_interval=%s" },
{ Opt_max_credits, "max_credits=%s" },
{ Opt_blank_user, "user=" },
{ Opt_blank_user, "username=" },
......@@ -1376,6 +1377,9 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
case Opt_nosetuids:
vol->setuids = 0;
break;
case Opt_setuidfromacl:
vol->setuidfromacl = 1;
break;
case Opt_dynperm:
vol->dynperm = true;
break;
......@@ -1586,6 +1590,15 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
}
vol->echo_interval = option;
break;
case Opt_max_credits:
if (get_option_ul(args, &option) || (option < 20) ||
(option > 60000)) {
cifs_dbg(VFS, "%s: Invalid max_credits value\n",
__func__);
goto cifs_parse_mount_err;
}
vol->max_credits = option;
break;
/* String Arguments */
......@@ -2163,7 +2176,7 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr,
sizeof(tcp_ses->dstaddr));
#ifdef CONFIG_CIFS_SMB2
get_random_bytes(tcp_ses->client_guid, SMB2_CLIENT_GUID_SIZE);
generate_random_uuid(tcp_ses->client_guid);
#endif
/*
* at this point we are the only ones with the pointer
......@@ -3270,6 +3283,8 @@ int cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
if (pvolume_info->setuids)
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
if (pvolume_info->setuidfromacl)
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UID_FROM_ACL;
if (pvolume_info->server_ino)
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
if (pvolume_info->remap)
......@@ -3598,7 +3613,11 @@ cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
bdi_destroy(&cifs_sb->bdi);
goto out;
}
if ((volume_info->max_credits < 20) ||
(volume_info->max_credits > 60000))
server->max_credits = SMB2_MAX_CREDITS_AVAILABLE;
else
server->max_credits = volume_info->max_credits;
/* get a reference to a SMB session */
ses = cifs_get_smb_ses(server, volume_info);
if (IS_ERR(ses)) {
......@@ -3688,14 +3707,16 @@ cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
goto mount_fail_check;
}
rc = cifs_are_all_path_components_accessible(server,
if (rc != -EREMOTE) {
rc = cifs_are_all_path_components_accessible(server,
xid, tcon, cifs_sb,
full_path);
if (rc != 0) {
cifs_dbg(VFS, "cannot query dirs between root and final path, "
"enabling CIFS_MOUNT_USE_PREFIX_PATH\n");
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH;
rc = 0;
if (rc != 0) {
cifs_dbg(VFS, "cannot query dirs between root and final path, "
"enabling CIFS_MOUNT_USE_PREFIX_PATH\n");
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH;
rc = 0;
}
}
kfree(full_path);
}
......
......@@ -305,6 +305,7 @@ cifs_new_fileinfo(struct cifs_fid *fid, struct file *file,
cfile->tlink = cifs_get_tlink(tlink);
INIT_WORK(&cfile->oplock_break, cifs_oplock_break);
mutex_init(&cfile->fh_mutex);
spin_lock_init(&cfile->file_info_lock);
cifs_sb_active(inode->i_sb);
......@@ -317,7 +318,7 @@ cifs_new_fileinfo(struct cifs_fid *fid, struct file *file,
oplock = 0;
}
spin_lock(&cifs_file_list_lock);
spin_lock(&tcon->open_file_lock);
if (fid->pending_open->oplock != CIFS_OPLOCK_NO_CHANGE && oplock)
oplock = fid->pending_open->oplock;
list_del(&fid->pending_open->olist);
......@@ -326,12 +327,13 @@ cifs_new_fileinfo(struct cifs_fid *fid, struct file *file,
server->ops->set_fid(cfile, fid, oplock);
list_add(&cfile->tlist, &tcon->openFileList);
/* if readable file instance put first in list*/
if (file->f_mode & FMODE_READ)
list_add(&cfile->flist, &cinode->openFileList);
else
list_add_tail(&cfile->flist, &cinode->openFileList);
spin_unlock(&cifs_file_list_lock);
spin_unlock(&tcon->open_file_lock);
if (fid->purge_cache)
cifs_zap_mapping(inode);
......@@ -343,16 +345,16 @@ cifs_new_fileinfo(struct cifs_fid *fid, struct file *file,
struct cifsFileInfo *
cifsFileInfo_get(struct cifsFileInfo *cifs_file)
{
spin_lock(&cifs_file_list_lock);
spin_lock(&cifs_file->file_info_lock);
cifsFileInfo_get_locked(cifs_file);
spin_unlock(&cifs_file_list_lock);
spin_unlock(&cifs_file->file_info_lock);
return cifs_file;
}
/*
* Release a reference on the file private data. This may involve closing
* the filehandle out on the server. Must be called without holding
* cifs_file_list_lock.
* tcon->open_file_lock and cifs_file->file_info_lock.
*/
void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
{
......@@ -367,11 +369,15 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
struct cifs_pending_open open;
bool oplock_break_cancelled;
spin_lock(&cifs_file_list_lock);
spin_lock(&tcon->open_file_lock);
spin_lock(&cifs_file->file_info_lock);
if (--cifs_file->count > 0) {
spin_unlock(&cifs_file_list_lock);
spin_unlock(&cifs_file->file_info_lock);
spin_unlock(&tcon->open_file_lock);
return;
}
spin_unlock(&cifs_file->file_info_lock);
if (server->ops->get_lease_key)
server->ops->get_lease_key(inode, &fid);
......@@ -395,7 +401,8 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
set_bit(CIFS_INO_INVALID_MAPPING, &cifsi->flags);
cifs_set_oplock_level(cifsi, 0);
}
spin_unlock(&cifs_file_list_lock);
spin_unlock(&tcon->open_file_lock);
oplock_break_cancelled = cancel_work_sync(&cifs_file->oplock_break);
......@@ -732,6 +739,15 @@ cifs_reopen_file(struct cifsFileInfo *cfile, bool can_flush)
* to the server to get the new inode info.
*/
/*
* If the server returned a read oplock and we have mandatory brlocks,
* set oplock level to None.
*/
if (server->ops->is_read_op(oplock) && cifs_has_mand_locks(cinode)) {
cifs_dbg(FYI, "Reset oplock val from read to None due to mand locks\n");
oplock = 0;
}
server->ops->set_fid(cfile, &cfile->fid, oplock);
if (oparms.reconnect)
cifs_relock_file(cfile);
......@@ -753,6 +769,36 @@ int cifs_close(struct inode *inode, struct file *file)
return 0;
}
void
cifs_reopen_persistent_handles(struct cifs_tcon *tcon)
{
struct cifsFileInfo *open_file;
struct list_head *tmp;
struct list_head *tmp1;
struct list_head tmp_list;
cifs_dbg(FYI, "Reopen persistent handles");
INIT_LIST_HEAD(&tmp_list);
/* list all files open on tree connection, reopen resilient handles */
spin_lock(&tcon->open_file_lock);
list_for_each(tmp, &tcon->openFileList) {
open_file = list_entry(tmp, struct cifsFileInfo, tlist);
if (!open_file->invalidHandle)
continue;