int cifs_get_inode_info(struct inode **pinode,
const unsigned char *search_path, FILE_ALL_INFO *pfindData,
struct super_block *sb, int xid)
{
int rc = 0;
struct cifsTconInfo *pTcon;
struct inode *inode;
struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
char *tmp_path;
char *buf = NULL;
pTcon = cifs_sb->tcon;
cFYI(1,("Getting info on %s ", search_path));
if ((pfindData == NULL) && (*pinode != NULL)) {
if (CIFS_I(*pinode)->clientCanCacheRead) {
cFYI(1,("No need to revalidate cached inode sizes"));
return rc;
}
}
/* if file info not passed in then get it from server */
if (pfindData == NULL) {
buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
if (buf == NULL)
return -ENOMEM;
pfindData = (FILE_ALL_INFO *)buf;
/* could do find first instead but this returns more info */
rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
}
/* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
if (rc) {
if (rc == -EREMOTE) {
tmp_path =
kmalloc(strnlen
(pTcon->treeName,
MAX_TREE_SIZE + 1) +
strnlen(search_path, MAX_PATHCONF) + 1,
GFP_KERNEL);
if (tmp_path == NULL) {
kfree(buf);
return -ENOMEM;
}
strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
strncat(tmp_path, search_path, MAX_PATHCONF);
rc = connect_to_dfs_path(xid, pTcon->ses,
/* treename + */ tmp_path,
cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
kfree(tmp_path);
/* BB fix up inode etc. */
} else if (rc) {
kfree(buf);
return rc;
}
} else {
struct cifsInodeInfo *cifsInfo;
__u32 attr = le32_to_cpu(pfindData->Attributes);
/* get new inode */
if (*pinode == NULL) {
*pinode = new_inode(sb);
if (*pinode == NULL)
return -ENOMEM;
/* Is an i_ino of zero legal? Can we use that to check
if the server supports returning inode numbers? Are
there other sanity checks we can use to ensure that
the server is really filling in that field? */
/* We can not use the IndexNumber field by default from
Windows or Samba (in ALL_INFO buf) but we can request
it explicitly. It may not be unique presumably if
the server has multiple devices mounted under one
share */
/* There may be higher info levels that work but are
there Windows server or network appliances for which
IndexNumber field is not guaranteed unique? */
#ifdef CONFIG_CIFS_EXPERIMENTAL
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM){
int rc1 = 0;
__u64 inode_num;
rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
search_path, &inode_num,
cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
if (rc1) {
cFYI(1,("GetSrvInodeNum rc %d", rc1));
/* BB EOPNOSUPP disable SERVER_INUM? */
} else /* do we need cast or hash to ino? */
(*pinode)->i_ino = inode_num;
} /* else ino incremented to unique num in new_inode*/
#endif /* CIFS_EXPERIMENTAL */
insert_inode_hash(*pinode);
}
inode = *pinode;
cifsInfo = CIFS_I(inode);
cifsInfo->cifsAttrs = attr;
cFYI(1, (" Old time %ld ", cifsInfo->time));
cifsInfo->time = jiffies;
cFYI(1, (" New time %ld ", cifsInfo->time));
/* blksize needs to be multiple of two. So safer to default to
blksize and blkbits set in superblock so 2**blkbits and blksize
will match rather than setting to:
(pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
/* Linux can not store file creation time unfortunately so we ignore it */
inode->i_atime =
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
inode->i_mtime =
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
inode->i_ctime =
cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
cFYI(0, (" Attributes came in as 0x%x ", attr));
/* set default mode. will override for dirs below */
if (atomic_read(&cifsInfo->inUse) == 0)
/* new inode, can safely set these fields */
inode->i_mode = cifs_sb->mnt_file_mode;
/* if (attr & ATTR_REPARSE) */
/* We no longer handle these as symlinks because we could not
follow them due to the absolute path with drive letter */
if (attr & ATTR_DIRECTORY) {
/* override default perms since we do not do byte range locking
on dirs */
inode->i_mode = cifs_sb->mnt_dir_mode;
inode->i_mode |= S_IFDIR;
} else {
inode->i_mode |= S_IFREG;
/* treat the dos attribute of read-only as read-only
mode e.g. 555 */
if (cifsInfo->cifsAttrs & ATTR_READONLY)
inode->i_mode &= ~(S_IWUGO);
/* BB add code here -
validate if device or weird share or device type? */
}
if (is_size_safe_to_change(cifsInfo)) {
/* can not safely change the file size here if the
client is writing to it due to potential races */
i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
/* 512 bytes (2**9) is the fake blocksize that must be
used for this calculation */
inode->i_blocks = (512 - 1 + le64_to_cpu(
pfindData->AllocationSize)) >> 9;
}
inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
/* BB fill in uid and gid here? with help from winbind?
or retrieve from NTFS stream extended attribute */
if (atomic_read(&cifsInfo->inUse) == 0) {
inode->i_uid = cifs_sb->mnt_uid;
inode->i_gid = cifs_sb->mnt_gid;
/* set so we do not keep refreshing these fields with
bad data after user has changed them in memory */
atomic_set(&cifsInfo->inUse,1);
}
if (S_ISREG(inode->i_mode)) {
cFYI(1, (" File inode "));
inode->i_op = &cifs_file_inode_ops;
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
inode->i_fop = &cifs_file_direct_ops;
else
inode->i_fop = &cifs_file_ops;
inode->i_data.a_ops = &cifs_addr_ops;
} else if (S_ISDIR(inode->i_mode)) {
cFYI(1, (" Directory inode "));
inode->i_op = &cifs_dir_inode_ops;
inode->i_fop = &cifs_dir_ops;
} else if (S_ISLNK(inode->i_mode)) {
cFYI(1, (" Symbolic Link inode "));
inode->i_op = &cifs_symlink_inode_ops;
} else {
init_special_inode(inode, inode->i_mode,
inode->i_rdev);
}
}
kfree(buf);
return rc;
}
int cifs_get_inode_info(struct inode **pinode,
const unsigned char *search_path, FILE_ALL_INFO *pfindData,
struct super_block *sb, int xid, const __u16 *pfid)
{
int rc = 0;
struct cifsTconInfo *pTcon;
struct inode *inode;
struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
const unsigned char *full_path = NULL;
char *buf = NULL;
int adjustTZ = FALSE;
bool is_dfs_referral = false;
pTcon = cifs_sb->tcon;
cFYI(1, ("Getting info on %s", search_path));
if ((pfindData == NULL) && (*pinode != NULL)) {
if (CIFS_I(*pinode)->clientCanCacheRead) {
cFYI(1, ("No need to revalidate cached inode sizes"));
return rc;
}
}
/* if file info not passed in then get it from server */
if (pfindData == NULL) {
buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
if (buf == NULL)
return -ENOMEM;
pfindData = (FILE_ALL_INFO *)buf;
full_path = cifs_get_search_path(cifs_sb, search_path);
try_again_CIFSSMBQPathInfo:
/* could do find first instead but this returns more info */
rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData,
0 /* not legacy */,
cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
/* BB optimize code so we do not make the above call
when server claims no NT SMB support and the above call
failed at least once - set flag in tcon or mount */
if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
rc = SMBQueryInformation(xid, pTcon, full_path,
pfindData, cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
adjustTZ = TRUE;
}
}
/* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
if (rc) {
if (rc == -EREMOTE && !is_dfs_referral) {
is_dfs_referral = true;
if (full_path != search_path) {
kfree(full_path);
full_path = search_path;
}
goto try_again_CIFSSMBQPathInfo;
}
goto cgii_exit;
} else {
struct cifsInodeInfo *cifsInfo;
__u32 attr = le32_to_cpu(pfindData->Attributes);
/* get new inode */
if (*pinode == NULL) {
*pinode = new_inode(sb);
if (*pinode == NULL) {
rc = -ENOMEM;
goto cgii_exit;
}
/* Is an i_ino of zero legal? Can we use that to check
if the server supports returning inode numbers? Are
there other sanity checks we can use to ensure that
the server is really filling in that field? */
/* We can not use the IndexNumber field by default from
Windows or Samba (in ALL_INFO buf) but we can request
it explicitly. It may not be unique presumably if
the server has multiple devices mounted under one
share */
/* There may be higher info levels that work but are
there Windows server or network appliances for which
IndexNumber field is not guaranteed unique? */
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
int rc1 = 0;
__u64 inode_num;
rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
search_path, &inode_num,
cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
if (rc1) {
cFYI(1, ("GetSrvInodeNum rc %d", rc1));
/* BB EOPNOSUPP disable SERVER_INUM? */
} else /* do we need cast or hash to ino? */
(*pinode)->i_ino = inode_num;
} /* else 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);
}
inode = *pinode;
cifsInfo = CIFS_I(inode);
cifsInfo->cifsAttrs = attr;
cFYI(1, ("Old time %ld", cifsInfo->time));
cifsInfo->time = jiffies;
cFYI(1, ("New time %ld", cifsInfo->time));
/* blksize needs to be multiple of two. So safer to default to
blksize and blkbits set in superblock so 2**blkbits and blksize
will match rather than setting to:
(pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
/* Linux can not store file creation time so ignore it */
if (pfindData->LastAccessTime)
inode->i_atime = cifs_NTtimeToUnix
(le64_to_cpu(pfindData->LastAccessTime));
else /* do not need to use current_fs_time - time not stored */
inode->i_atime = CURRENT_TIME;
inode->i_mtime =
cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
inode->i_ctime =
cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
cFYI(0, ("Attributes came in as 0x%x", attr));
if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) {
inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj;
inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj;
}
/* set default mode. will override for dirs below */
if (atomic_read(&cifsInfo->inUse) == 0)
/* new inode, can safely set these fields */
inode->i_mode = cifs_sb->mnt_file_mode;
else /* since we set the inode type below we need to mask off
to avoid strange results if type changes and both
get orred in */
inode->i_mode &= ~S_IFMT;
/* if (attr & ATTR_REPARSE) */
/* We no longer handle these as symlinks because we could not
follow them due to the absolute path with drive letter */
if (attr & ATTR_DIRECTORY) {
/* override default perms since we do not do byte range locking
on dirs */
inode->i_mode = cifs_sb->mnt_dir_mode;
inode->i_mode |= S_IFDIR;
} else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
(cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
/* No need to le64 convert size of zero */
(pfindData->EndOfFile == 0)) {
inode->i_mode = cifs_sb->mnt_file_mode;
inode->i_mode |= S_IFIFO;
/* BB Finish for SFU style symlinks and devices */
} else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
(cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
if (decode_sfu_inode(inode,
le64_to_cpu(pfindData->EndOfFile),
search_path,
cifs_sb, xid))
cFYI(1, ("Unrecognized sfu inode type"));
cFYI(1, ("sfu mode 0%o", inode->i_mode));
} else {
inode->i_mode |= S_IFREG;
/* treat the dos attribute of read-only as read-only
mode e.g. 555 */
if (cifsInfo->cifsAttrs & ATTR_READONLY)
inode->i_mode &= ~(S_IWUGO);
else if ((inode->i_mode & S_IWUGO) == 0)
/* the ATTR_READONLY flag may have been */
/* changed on server -- set any w bits */
/* allowed by mnt_file_mode */
inode->i_mode |= (S_IWUGO &
cifs_sb->mnt_file_mode);
/* BB add code here -
validate if device or weird share or device type? */
}
spin_lock(&inode->i_lock);
if (is_size_safe_to_change(cifsInfo,
le64_to_cpu(pfindData->EndOfFile))) {
/* can not safely shrink the file size here if the
client is writing to it due to potential races */
i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
/* 512 bytes (2**9) is the fake blocksize that must be
used for this calculation */
inode->i_blocks = (512 - 1 + le64_to_cpu(
pfindData->AllocationSize)) >> 9;
}
spin_unlock(&inode->i_lock);
inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
/* BB fill in uid and gid here? with help from winbind?
or retrieve from NTFS stream extended attribute */
#ifdef CONFIG_CIFS_EXPERIMENTAL
/* fill in 0777 bits from ACL */
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
cFYI(1, ("Getting mode bits from ACL"));
acl_to_uid_mode(inode, search_path, pfid);
}
#endif
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
/* fill in remaining high mode bits e.g. SUID, VTX */
get_sfu_mode(inode, search_path, cifs_sb, xid);
} else if (atomic_read(&cifsInfo->inUse) == 0) {
inode->i_uid = cifs_sb->mnt_uid;
inode->i_gid = cifs_sb->mnt_gid;
/* set so we do not keep refreshing these fields with
bad data after user has changed them in memory */
atomic_set(&cifsInfo->inUse, 1);
}
cifs_set_ops(inode, is_dfs_referral);
}