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author | Steve French <sfrench@us.ibm.com> | 2008-05-20 19:50:46 +0000 |
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committer | Steve French <sfrench@us.ibm.com> | 2008-05-20 19:50:46 +0000 |
commit | 0e4bbde94fdc33f5b3d793166b21bf768ca3e098 (patch) | |
tree | 858cc58dcd5b49de3611826cf5e57ae5d54345ed /fs/cifs/inode.c | |
parent | 89562b777c50d100d1694db7b1b023279839b9ae (diff) | |
download | lwn-0e4bbde94fdc33f5b3d793166b21bf768ca3e098.tar.gz lwn-0e4bbde94fdc33f5b3d793166b21bf768ca3e098.zip |
[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>
Diffstat (limited to 'fs/cifs/inode.c')
-rw-r--r-- | fs/cifs/inode.c | 117 |
1 files changed, 74 insertions, 43 deletions
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 9d9b56a9c08e..422d4e219fa4 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -161,77 +161,108 @@ static void cifs_unix_info_to_inode(struct inode *inode, spin_unlock(&inode->i_lock); } +static void fill_fake_finddataunix(FILE_UNIX_BASIC_INFO *pfnd_dat, + struct super_block *sb) +{ + struct inode *pinode = NULL; + + memset(pfnd_dat, sizeof(FILE_UNIX_BASIC_INFO), 0); + +/* __le64 pfnd_dat->EndOfFile = cpu_to_le64(0); + __le64 pfnd_dat->NumOfBytes = cpu_to_le64(0); + __u64 UniqueId = 0; */ + pfnd_dat->LastStatusChange = + cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); + pfnd_dat->LastAccessTime = + cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); + pfnd_dat->LastModificationTime = + cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); + pfnd_dat->Type = cpu_to_le32(UNIX_DIR); + pfnd_dat->Permissions = cpu_to_le64(S_IXUGO | S_IRWXU); + pfnd_dat->Nlinks = cpu_to_le64(2); + if (sb->s_root) + pinode = sb->s_root->d_inode; + if (pinode == NULL) + return; + + /* fill in default values for the remaining based on root + inode since we can not query the server for this inode info */ + pfnd_dat->DevMajor = cpu_to_le64(MAJOR(pinode->i_rdev)); + pfnd_dat->DevMinor = cpu_to_le64(MINOR(pinode->i_rdev)); + pfnd_dat->Uid = cpu_to_le64(pinode->i_uid); + pfnd_dat->Gid = cpu_to_le64(pinode->i_gid); +} + int cifs_get_inode_info_unix(struct inode **pinode, const unsigned char *full_path, struct super_block *sb, int xid) { int rc = 0; - FILE_UNIX_BASIC_INFO findData; + FILE_UNIX_BASIC_INFO find_data; struct cifsTconInfo *pTcon; struct inode *inode; struct cifs_sb_info *cifs_sb = CIFS_SB(sb); bool is_dfs_referral = false; + struct cifsInodeInfo *cifsInfo; + __u64 num_of_bytes; + __u64 end_of_file; pTcon = cifs_sb->tcon; cFYI(1, ("Getting info on %s", full_path)); -try_again_CIFSSMBUnixQPathInfo: /* could have done a find first instead but this returns more info */ - rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &findData, + rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &find_data, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); -/* dump_mem("\nUnixQPathInfo return data", &findData, - sizeof(findData)); */ if (rc) { if (rc == -EREMOTE && !is_dfs_referral) { is_dfs_referral = true; - goto try_again_CIFSSMBUnixQPathInfo; + cERROR(1, ("DFS ref")); /* BB removeme BB */ + /* for DFS, server does not give us real inode data */ + fill_fake_finddataunix(&find_data, sb); + rc = 0; } - goto cgiiu_exit; - } else { - struct cifsInodeInfo *cifsInfo; - __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes); - __u64 end_of_file = le64_to_cpu(findData.EndOfFile); + } + num_of_bytes = le64_to_cpu(find_data.NumOfBytes); + end_of_file = le64_to_cpu(find_data.EndOfFile); - /* get new inode */ + /* get new inode */ + if (*pinode == NULL) { + *pinode = new_inode(sb); if (*pinode == NULL) { - *pinode = new_inode(sb); - if (*pinode == NULL) { - rc = -ENOMEM; - goto cgiiu_exit; - } - /* Is an i_ino of zero legal? */ - /* Are there sanity checks we can use to ensure that - the server is really filling in that field? */ - if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { - (*pinode)->i_ino = - (unsigned long)findData.UniqueId; - } /* note ino incremented to unique num in new_inode */ - if (sb->s_flags & MS_NOATIME) - (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME; - - insert_inode_hash(*pinode); + rc = -ENOMEM; + goto cgiiu_exit; } + /* Is an i_ino of zero legal? */ + /* note ino incremented to unique num in new_inode */ + /* Are there sanity checks we can use to ensure that + the server is really filling in that field? */ + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) + (*pinode)->i_ino = (unsigned long)find_data.UniqueId; - inode = *pinode; - cifsInfo = CIFS_I(inode); + if (sb->s_flags & MS_NOATIME) + (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME; - cFYI(1, ("Old time %ld", cifsInfo->time)); - cifsInfo->time = jiffies; - cFYI(1, ("New time %ld", cifsInfo->time)); - /* this is ok to set on every inode revalidate */ - atomic_set(&cifsInfo->inUse, 1); + insert_inode_hash(*pinode); + } - cifs_unix_info_to_inode(inode, &findData, 0); + inode = *pinode; + cifsInfo = CIFS_I(inode); + cFYI(1, ("Old time %ld", cifsInfo->time)); + cifsInfo->time = jiffies; + cFYI(1, ("New time %ld", cifsInfo->time)); + /* this is ok to set on every inode revalidate */ + atomic_set(&cifsInfo->inUse, 1); - if (num_of_bytes < end_of_file) - cFYI(1, ("allocation size less than end of file")); - cFYI(1, ("Size %ld and blocks %llu", - (unsigned long) inode->i_size, - (unsigned long long)inode->i_blocks)); + cifs_unix_info_to_inode(inode, &find_data, 0); - cifs_set_ops(inode, is_dfs_referral); - } + if (num_of_bytes < end_of_file) + cFYI(1, ("allocation size less than end of file")); + cFYI(1, ("Size %ld and blocks %llu", + (unsigned long) inode->i_size, + (unsigned long long)inode->i_blocks)); + + cifs_set_ops(inode, is_dfs_referral); cgiiu_exit: return rc; } |