[CIFS] Allow disabling CIFS Unix Extensions as mount option
Previously the only way to do this was to umount all mounts to that server, turn off a proc setting (/proc/fs/cifs/LinuxExtensionsEnabled). Fixes Samba bugzilla bug number: 4582 (and also 2008) Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French
Родитель
63135e088a
Коммит
c18c842b1f
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@ -316,10 +316,10 @@ cifs_show_options(struct seq_file *s, struct vfsmount *m)
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
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seq_printf(s, ",posixpaths");
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if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) ||
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!(cifs_sb->tcon->ses->capabilities & CAP_UNIX))
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!(cifs_sb->tcon->unix_ext))
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seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
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if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) ||
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!(cifs_sb->tcon->ses->capabilities & CAP_UNIX))
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!(cifs_sb->tcon->unix_ext))
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seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
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seq_printf(s, ",rsize=%d", cifs_sb->rsize);
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seq_printf(s, ",wsize=%d", cifs_sb->wsize);
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@ -281,7 +281,9 @@ struct cifsTconInfo {
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FILE_SYSTEM_UNIX_INFO fsUnixInfo;
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unsigned retry:1;
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unsigned nocase:1;
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/* BB add field for back pointer to sb struct? */
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unsigned unix_ext:1; /* if off disable Linux extensions to CIFS protocol
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for this mount even if server would support */
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/* BB add field for back pointer to sb struct(s)? */
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};
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/*
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@ -132,10 +132,10 @@ small_smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
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/* Give Demultiplex thread up to 10 seconds to
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reconnect, should be greater than cifs socket
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timeout which is 7 seconds */
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while(tcon->ses->server->tcpStatus ==
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while (tcon->ses->server->tcpStatus ==
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CifsNeedReconnect) {
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wait_event_interruptible_timeout(tcon->ses->server->response_q,
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(tcon->ses->server->tcpStatus ==
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(tcon->ses->server->tcpStatus ==
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CifsGood), 10 * HZ);
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if (tcon->ses->server->tcpStatus ==
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CifsNeedReconnect) {
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@ -213,7 +213,7 @@ small_smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
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}
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header_assemble((struct smb_hdr *) *request_buf, smb_command,
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tcon,wct);
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tcon, wct);
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if (tcon != NULL)
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cifs_stats_inc(&tcon->num_smbs_sent);
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@ -387,7 +387,7 @@ static int validate_t2(struct smb_t2_rsp *pSMB)
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/* check that bcc is less than negotiated smb buffer */
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total_size = le16_to_cpu(pSMB->t2_rsp.ParameterCount);
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if (total_size < 512) {
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total_size +=
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total_size +=
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le16_to_cpu(pSMB->t2_rsp.DataCount);
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/* BCC le converted in SendReceive */
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pBCC = (pSMB->hdr.WordCount * 2) +
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@ -2758,7 +2758,7 @@ static __u16 ACL_to_cifs_posix(char *parm_data, const char *pACL,
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return 0;
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count = posix_acl_xattr_count((size_t)buflen);
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cFYI(1,("setting acl with %d entries from buf of length %d and "
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cFYI(1, ("setting acl with %d entries from buf of length %d and "
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"version of %d",
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count, buflen, le32_to_cpu(local_acl->a_version)));
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if (le32_to_cpu(local_acl->a_version) != 2) {
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@ -3638,15 +3638,6 @@ int CIFSFindNext(const int xid, struct cifsTconInfo *tcon,
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pSMB->SearchHandle = searchHandle; /* always kept as le */
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pSMB->SearchCount =
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cpu_to_le16(CIFSMaxBufSize / sizeof (FILE_UNIX_INFO));
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/* test for Unix extensions */
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/* if (tcon->ses->capabilities & CAP_UNIX) {
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pSMB->InformationLevel = cpu_to_le16(SMB_FIND_FILE_UNIX);
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psrch_inf->info_level = SMB_FIND_FILE_UNIX;
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} else {
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pSMB->InformationLevel =
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cpu_to_le16(SMB_FIND_FILE_DIRECTORY_INFO);
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psrch_inf->info_level = SMB_FIND_FILE_DIRECTORY_INFO;
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} */
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pSMB->InformationLevel = cpu_to_le16(psrch_inf->info_level);
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pSMB->ResumeKey = psrch_inf->resume_key;
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pSMB->SearchFlags =
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@ -3966,7 +3957,7 @@ getDFSRetry:
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(8 /* sizeof start of data block */ +
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data_offset +
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(char *) &pSMBr->hdr.Protocol);
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cFYI(1,("num_referrals: %d dfs flags: 0x%x ... \n"
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cFYI(1, ("num_referrals: %d dfs flags: 0x%x ... \n"
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"for referral one refer size: 0x%x srv "
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"type: 0x%x refer flags: 0x%x ttl: 0x%x",
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le16_to_cpu(pSMBr->NumberOfReferrals),
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@ -85,6 +85,7 @@ struct smb_vol {
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unsigned direct_io:1;
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unsigned remap:1; /* set to remap seven reserved chars in filenames */
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unsigned posix_paths:1; /* unset to not ask for posix pathnames. */
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unsigned no_linux_ext:1;
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unsigned sfu_emul:1;
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unsigned nullauth:1; /* attempt to authenticate with null user */
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unsigned nocase; /* request case insensitive filenames */
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@ -1192,6 +1193,10 @@ cifs_parse_mount_options(char *options, const char *devname,
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vol->posix_paths = 1;
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} else if (strnicmp(data, "noposixpaths", 12) == 0) {
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vol->posix_paths = 0;
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} else if (strnicmp(data, "nounix", 6) == 0) {
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vol->no_linux_ext = 1;
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} else if (strnicmp(data, "nolinux", 7) == 0) {
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vol->no_linux_ext = 1;
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} else if ((strnicmp(data, "nocase", 6) == 0) ||
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(strnicmp(data, "ignorecase", 10) == 0)) {
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vol->nocase = 1;
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@ -1665,6 +1670,18 @@ void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
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* and once without posixacls or posix paths? */
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__u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
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if (vol_info && vol_info->no_linux_ext) {
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tcon->fsUnixInfo.Capability = 0;
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tcon->unix_ext = 0; /* Unix Extensions disabled */
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cFYI(1, ("Linux protocol extensions disabled"));
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return;
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} else if (vol_info)
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tcon->unix_ext = 1; /* Unix Extensions supported */
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if (tcon->unix_ext == 0) {
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cFYI(1, ("Unix extensions disabled so not set on reconnect"));
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return;
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}
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if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
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__u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
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@ -1678,10 +1695,6 @@ void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
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cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
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if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0)
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cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
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}
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cap &= CIFS_UNIX_CAP_MASK;
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@ -2176,13 +2189,17 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
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/* tell server which Unix caps we support */
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if (tcon->ses->capabilities & CAP_UNIX)
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/* reset of caps checks mount to see if unix extensions
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disabled for just this mount */
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reset_cifs_unix_caps(xid, tcon, sb, &volume_info);
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else if (cifs_sb->rsize > (1024 * 127)) {
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else
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tcon->unix_ext = 0; /* server does not support them */
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if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
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cifs_sb->rsize = 1024 * 127;
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#ifdef CONFIG_CIFS_DEBUG2
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cFYI(1, ("no very large read support, rsize 127K"));
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cFYI(1, ("no very large read support, rsize now 127K"));
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#endif
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}
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if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
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cifs_sb->wsize = min(cifs_sb->wsize,
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@ -207,8 +207,7 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
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} else {
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/* If Open reported that we actually created a file
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then we now have to set the mode if possible */
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if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX) &&
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(oplock & CIFS_CREATE_ACTION)) {
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if ((pTcon->unix_ext) && (oplock & CIFS_CREATE_ACTION)) {
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mode &= ~current->fs->umask;
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
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CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode,
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@ -235,8 +234,8 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
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/* Could set r/o dos attribute if mode & 0222 == 0 */
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}
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/* BB server might mask mode so we have to query for Unix case*/
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if (pTcon->ses->capabilities & CAP_UNIX)
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/* server might mask mode so we have to query for it */
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if (pTcon->unix_ext)
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rc = cifs_get_inode_info_unix(&newinode, full_path,
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inode->i_sb, xid);
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else {
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@ -337,7 +336,7 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
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full_path = build_path_from_dentry(direntry);
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if (full_path == NULL)
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rc = -ENOMEM;
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else if (pTcon->ses->capabilities & CAP_UNIX) {
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else if (pTcon->unix_ext) {
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mode &= ~current->fs->umask;
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
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rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path,
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@ -491,7 +490,7 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
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cFYI(1,
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(" Full path: %s inode = 0x%p", full_path, direntry->d_inode));
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if (pTcon->ses->capabilities & CAP_UNIX)
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if (pTcon->unix_ext)
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rc = cifs_get_inode_info_unix(&newInode, full_path,
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parent_dir_inode->i_sb, xid);
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else
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@ -138,7 +138,7 @@ static inline int cifs_open_inode_helper(struct inode *inode, struct file *file,
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}
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client_can_cache:
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if (pTcon->ses->capabilities & CAP_UNIX)
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if (pTcon->unix_ext)
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rc = cifs_get_inode_info_unix(&file->f_path.dentry->d_inode,
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full_path, inode->i_sb, xid);
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else
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@ -303,7 +303,7 @@ int cifs_open(struct inode *inode, struct file *file)
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if (oplock & CIFS_CREATE_ACTION) {
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/* time to set mode which we can not set earlier due to
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problems creating new read-only files */
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if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
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if (pTcon->unix_ext) {
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CIFSSMBUnixSetPerms(xid, pTcon, full_path,
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inode->i_mode,
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(__u64)-1, (__u64)-1, 0 /* dev */,
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@ -430,7 +430,7 @@ reopen_error_exit:
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go to server to get inode info */
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pCifsInode->clientCanCacheAll = FALSE;
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pCifsInode->clientCanCacheRead = FALSE;
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if (pTcon->ses->capabilities & CAP_UNIX)
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if (pTcon->unix_ext)
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rc = cifs_get_inode_info_unix(&inode,
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full_path, inode->i_sb, xid);
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else
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@ -583,7 +583,8 @@ void cifs_read_inode(struct inode *inode)
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cifs_sb = CIFS_SB(inode->i_sb);
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xid = GetXid();
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if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
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if (cifs_sb->tcon->unix_ext)
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cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
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else
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cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid);
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@ -981,7 +982,7 @@ int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
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} else {
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mkdir_get_info:
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inc_nlink(inode);
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if (pTcon->ses->capabilities & CAP_UNIX)
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if (pTcon->unix_ext)
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rc = cifs_get_inode_info_unix(&newinode, full_path,
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inode->i_sb, xid);
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else
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@ -997,7 +998,7 @@ mkdir_get_info:
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* failed to get it from the server or was set bogus */
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if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
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direntry->d_inode->i_nlink = 2;
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if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
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if (pTcon->unix_ext) {
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mode &= ~current->fs->umask;
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
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CIFSSMBUnixSetPerms(xid, pTcon, full_path,
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@ -1130,7 +1131,7 @@ int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
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kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
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if (info_buf_source != NULL) {
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info_buf_target = info_buf_source + 1;
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if (pTcon->ses->capabilities & CAP_UNIX)
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if (pTcon->unix_ext)
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rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
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info_buf_source,
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cifs_sb_source->local_nls,
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@ -1258,7 +1259,7 @@ int cifs_revalidate(struct dentry *direntry)
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local_mtime = direntry->d_inode->i_mtime;
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local_size = direntry->d_inode->i_size;
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if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
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if (cifs_sb->tcon->unix_ext) {
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rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
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direntry->d_sb, xid);
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if (rc) {
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@ -1542,7 +1543,7 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
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mode = attrs->ia_mode;
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}
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if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
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if ((pTcon->unix_ext)
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&& (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
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rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
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0 /* dev_t */, cifs_sb->local_nls,
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@ -55,7 +55,8 @@ cifs_hardlink(struct dentry *old_file, struct inode *inode,
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goto cifs_hl_exit;
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}
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if (cifs_sb_target->tcon->ses->capabilities & CAP_UNIX)
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/* if (cifs_sb_target->tcon->ses->capabilities & CAP_UNIX)*/
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if (pTcon->unix_ext)
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rc = CIFSUnixCreateHardLink(xid, pTcon, fromName, toName,
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cifs_sb_target->local_nls,
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cifs_sb_target->mnt_cifs_flags &
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@ -129,14 +130,19 @@ cifs_follow_link(struct dentry *direntry, struct nameidata *nd)
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goto out;
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}
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/* BB add read reparse point symlink code and Unix extensions
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symlink code here BB */
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/* We could change this to:
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if (pTcon->unix_ext)
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but there does not seem any point in refusing to
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get symlink info if we can, even if unix extensions
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turned off for this mount */
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if (pTcon->ses->capabilities & CAP_UNIX)
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rc = CIFSSMBUnixQuerySymLink(xid, pTcon, full_path,
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target_path,
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PATH_MAX-1,
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cifs_sb->local_nls);
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else {
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/* BB add read reparse point symlink code here */
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/* rc = CIFSSMBQueryReparseLinkInfo */
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/* BB Add code to Query ReparsePoint info */
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/* BB Add MAC style xsymlink check here if enabled */
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@ -186,7 +192,7 @@ cifs_symlink(struct inode *inode, struct dentry *direntry, const char *symname)
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cFYI(1, ("symname is %s", symname));
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/* BB what if DFS and this volume is on different share? BB */
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if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
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if (pTcon->unix_ext)
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rc = CIFSUnixCreateSymLink(xid, pTcon, full_path, symname,
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cifs_sb->local_nls);
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/* else
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@ -194,7 +200,7 @@ cifs_symlink(struct inode *inode, struct dentry *direntry, const char *symname)
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cifs_sb_target->local_nls); */
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if (rc == 0) {
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if (pTcon->ses->capabilities & CAP_UNIX)
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if (pTcon->unix_ext)
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rc = cifs_get_inode_info_unix(&newinode, full_path,
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inode->i_sb, xid);
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else
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@ -266,6 +272,7 @@ cifs_readlink(struct dentry *direntry, char __user *pBuffer, int buflen)
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/* BB add read reparse point symlink code and
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Unix extensions symlink code here BB */
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/* We could disable this based on pTcon->unix_ext flag instead ... but why? */
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if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
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rc = CIFSSMBUnixQuerySymLink(xid, pTcon, full_path,
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tmpbuffer,
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@ -463,7 +463,9 @@ static int initiate_cifs_search(const int xid, struct file *file)
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|
||||
ffirst_retry:
|
||||
/* test for Unix extensions */
|
||||
if (pTcon->ses->capabilities & CAP_UNIX) {
|
||||
/* but now check for them on the share/mount not on the SMB session */
|
||||
/* if (pTcon->ses->capabilities & CAP_UNIX) { */
|
||||
if (pTcon->unix_ext) {
|
||||
cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
|
||||
} else if ((pTcon->ses->capabilities &
|
||||
(CAP_NT_SMBS | CAP_NT_FIND)) == 0) {
|
||||
|
|
|
|||
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Ссылка в новой задаче