[CIFS] Enable DFS support for Unix query path info
Final piece for handling DFS in unix_query_path_info, constructing a fake inode for the junction directory which the submount will cover. Acked-by: Igor Mammedov <niallain@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French
parent
89562b777c
commit
0e4bbde94f
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@ -36,6 +36,7 @@ Miklos Szeredi
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Kazeon team for various fixes especially for 2.4 version.
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Asser Ferno (Change Notify support)
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Shaggy (Dave Kleikamp) for inumerable small fs suggestions and some good cleanup
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Igor Mammedov (DFS support)
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Test case and Bug Report contributors
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-------------------------------------
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@ -1,5 +1,7 @@
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Version 1.53
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------------
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DFS support added (Microsoft Distributed File System client support needed
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for referrals which enable a hierarchical name space among servers).
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Version 1.52
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------------
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15
fs/cifs/TODO
15
fs/cifs/TODO
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@ -1,4 +1,4 @@
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Version 1.52 January 3, 2008
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Version 1.53 May 20, 2008
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A Partial List of Missing Features
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==================================
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@ -20,20 +20,21 @@ d) Cleanup now unneeded SessSetup code in
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fs/cifs/connect.c and add back in NTLMSSP code if any servers
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need it
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e) ms-dfs and ms-dfs host name resolution cleanup
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f) fix NTLMv2 signing when two mounts with different users to same
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e) fix NTLMv2 signing when two mounts with different users to same
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server.
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g) Directory entry caching relies on a 1 second timer, rather than
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f) Directory entry caching relies on a 1 second timer, rather than
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using FindNotify or equivalent. - (started)
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h) quota support (needs minor kernel change since quota calls
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g) quota support (needs minor kernel change since quota calls
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to make it to network filesystems or deviceless filesystems)
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i) investigate sync behavior (including syncpage) and check
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h) investigate sync behavior (including syncpage) and check
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for proper behavior of intr/nointr
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i) improve support for very old servers (OS/2 and Win9x for example)
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Including support for changing the time remotely (utimes command).
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j) hook lower into the sockets api (as NFS/SunRPC does) to avoid the
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extra copy in/out of the socket buffers in some cases.
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133
fs/cifs/inode.c
133
fs/cifs/inode.c
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@ -161,77 +161,108 @@ static void cifs_unix_info_to_inode(struct inode *inode,
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spin_unlock(&inode->i_lock);
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}
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static void fill_fake_finddataunix(FILE_UNIX_BASIC_INFO *pfnd_dat,
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struct super_block *sb)
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{
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struct inode *pinode = NULL;
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memset(pfnd_dat, sizeof(FILE_UNIX_BASIC_INFO), 0);
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/* __le64 pfnd_dat->EndOfFile = cpu_to_le64(0);
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__le64 pfnd_dat->NumOfBytes = cpu_to_le64(0);
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__u64 UniqueId = 0; */
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pfnd_dat->LastStatusChange =
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cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
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pfnd_dat->LastAccessTime =
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cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
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pfnd_dat->LastModificationTime =
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cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
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pfnd_dat->Type = cpu_to_le32(UNIX_DIR);
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pfnd_dat->Permissions = cpu_to_le64(S_IXUGO | S_IRWXU);
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pfnd_dat->Nlinks = cpu_to_le64(2);
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if (sb->s_root)
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pinode = sb->s_root->d_inode;
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if (pinode == NULL)
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return;
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/* fill in default values for the remaining based on root
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inode since we can not query the server for this inode info */
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pfnd_dat->DevMajor = cpu_to_le64(MAJOR(pinode->i_rdev));
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pfnd_dat->DevMinor = cpu_to_le64(MINOR(pinode->i_rdev));
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pfnd_dat->Uid = cpu_to_le64(pinode->i_uid);
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pfnd_dat->Gid = cpu_to_le64(pinode->i_gid);
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}
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int cifs_get_inode_info_unix(struct inode **pinode,
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const unsigned char *full_path, struct super_block *sb, int xid)
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{
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int rc = 0;
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FILE_UNIX_BASIC_INFO findData;
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FILE_UNIX_BASIC_INFO find_data;
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struct cifsTconInfo *pTcon;
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struct inode *inode;
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struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
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bool is_dfs_referral = false;
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struct cifsInodeInfo *cifsInfo;
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__u64 num_of_bytes;
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__u64 end_of_file;
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pTcon = cifs_sb->tcon;
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cFYI(1, ("Getting info on %s", full_path));
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try_again_CIFSSMBUnixQPathInfo:
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/* could have done a find first instead but this returns more info */
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rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &findData,
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rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &find_data,
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cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
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CIFS_MOUNT_MAP_SPECIAL_CHR);
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/* dump_mem("\nUnixQPathInfo return data", &findData,
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sizeof(findData)); */
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if (rc) {
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if (rc == -EREMOTE && !is_dfs_referral) {
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is_dfs_referral = true;
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goto try_again_CIFSSMBUnixQPathInfo;
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cERROR(1, ("DFS ref")); /* BB removeme BB */
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/* for DFS, server does not give us real inode data */
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fill_fake_finddataunix(&find_data, sb);
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rc = 0;
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}
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goto cgiiu_exit;
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} else {
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struct cifsInodeInfo *cifsInfo;
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__u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
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__u64 end_of_file = le64_to_cpu(findData.EndOfFile);
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/* get new inode */
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if (*pinode == NULL) {
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*pinode = new_inode(sb);
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if (*pinode == NULL) {
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rc = -ENOMEM;
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goto cgiiu_exit;
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}
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/* Is an i_ino of zero legal? */
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/* Are there sanity checks we can use to ensure that
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the server is really filling in that field? */
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
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(*pinode)->i_ino =
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(unsigned long)findData.UniqueId;
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} /* note ino incremented to unique num in new_inode */
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if (sb->s_flags & MS_NOATIME)
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(*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
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insert_inode_hash(*pinode);
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}
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inode = *pinode;
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cifsInfo = CIFS_I(inode);
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cFYI(1, ("Old time %ld", cifsInfo->time));
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cifsInfo->time = jiffies;
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cFYI(1, ("New time %ld", cifsInfo->time));
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/* this is ok to set on every inode revalidate */
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atomic_set(&cifsInfo->inUse, 1);
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cifs_unix_info_to_inode(inode, &findData, 0);
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if (num_of_bytes < end_of_file)
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cFYI(1, ("allocation size less than end of file"));
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cFYI(1, ("Size %ld and blocks %llu",
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(unsigned long) inode->i_size,
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(unsigned long long)inode->i_blocks));
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cifs_set_ops(inode, is_dfs_referral);
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}
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num_of_bytes = le64_to_cpu(find_data.NumOfBytes);
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end_of_file = le64_to_cpu(find_data.EndOfFile);
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/* get new inode */
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if (*pinode == NULL) {
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*pinode = new_inode(sb);
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if (*pinode == NULL) {
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rc = -ENOMEM;
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goto cgiiu_exit;
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}
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/* Is an i_ino of zero legal? */
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/* note ino incremented to unique num in new_inode */
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/* Are there sanity checks we can use to ensure that
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the server is really filling in that field? */
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
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(*pinode)->i_ino = (unsigned long)find_data.UniqueId;
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if (sb->s_flags & MS_NOATIME)
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(*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
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insert_inode_hash(*pinode);
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}
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inode = *pinode;
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cifsInfo = CIFS_I(inode);
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cFYI(1, ("Old time %ld", cifsInfo->time));
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cifsInfo->time = jiffies;
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cFYI(1, ("New time %ld", cifsInfo->time));
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/* this is ok to set on every inode revalidate */
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atomic_set(&cifsInfo->inUse, 1);
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cifs_unix_info_to_inode(inode, &find_data, 0);
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if (num_of_bytes < end_of_file)
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cFYI(1, ("allocation size less than end of file"));
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cFYI(1, ("Size %ld and blocks %llu",
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(unsigned long) inode->i_size,
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(unsigned long long)inode->i_blocks));
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cifs_set_ops(inode, is_dfs_referral);
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cgiiu_exit:
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return rc;
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}
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