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[CIFS] Recognize properly symlinks and char/blk devices (not just

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FIFOs) created by SFU (part 2 of 2).

    Thanks to Martin Koeppe for useful analysis.

    Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French 2005-11-17 16:59:21 -08:00
parent 0f2b27c438
commit 9e294f1c4d
1 changed files with 44 additions and 4 deletions
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48
fs/cifs/inode.c
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@ -228,9 +228,20 @@ static int decode_sfu_inode(struct inode * inode, __u64 size,
8 /* length */, 0 /* offset */,
&bytes_read, &pbuf);
if((rc == 0) && (bytes_read == 8)) {
/* if memcmp(IntxCHR\000, pbuf, 8)
else if memcmp(IntxBLK\000, pbuf, 8)
else if memcmp(IntxLNK\001, pbuf, 8) */
cERROR(1,("intx %s" ,pbuf));
if(memcmp("IntxBLK", pbuf, 8) == 0) {
cFYI(1,("Block device"));
inode->i_mode = S_IFBLK;
} else if(memcmp("IntxCHR", pbuf, 8) == 0) {
cFYI(1,("Char device"));
inode->i_mode = S_IFCHR;
} else if(memcmp("IntxLNK", pbuf, 7) == 0) {
cFYI(1,("Symlink"));
inode->i_mode = S_IFLNK;
} else
inode->i_mode = S_IFREG; /* then it is a file */
rc = -EOPNOTSUPP; /* or some unknown SFU type */
}
CIFSSMBClose(xid, pTcon, netfid);
@ -244,6 +255,32 @@ static int decode_sfu_inode(struct inode * inode, __u64 size,
}
#define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
static int get_sfu_uid_mode(struct inode * inode,
const unsigned char *path,
struct cifs_sb_info *cifs_sb, int xid)
{
ssize_t rc;
char ea_value[4];
__u32 mode;
rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
ea_value, 4 /* size of buf */, cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
if(rc < 0)
return (int)rc;
else if (rc > 3) {
mode = le32_to_cpu(*((__le32 *)ea_value));
inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode;
cFYI(1,("special mode bits 0%o", mode));
return 0;
} else {
return 0;
}
}
int cifs_get_inode_info(struct inode **pinode,
const unsigned char *search_path, FILE_ALL_INFO *pfindData,
struct super_block *sb, int xid)
@ -427,7 +464,10 @@ int cifs_get_inode_info(struct inode **pinode,
/* BB fill in uid and gid here? with help from winbind?
or retrieve from NTFS stream extended attribute */
if (atomic_read(&cifsInfo->inUse) == 0) {
if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
/* fill in uid, gid, mode from server ACL */
get_sfu_uid_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