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cifs: Recognize SFU socket type

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SFU since its (first) version 3.0 supports AF_LOCAL sockets and stores them
on filesytem as system file with one zero byte. Add support for detecting
this SFU socket type into cifs_sfu_type() function.

With this change cifs_sfu_type() would correctly detect all special file
types created by SFU: fifo, socket, symlink, block and char.

Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Pali Rohár 2024-09-12 14:05:46 +02:00 committed by Steve French
parent 25f6bd0fb0
commit 2ba0d8947e
1 changed files with 5 additions and 1 deletions
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6
fs/smb/client/inode.c
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@ -545,7 +545,7 @@ cifs_sfu_type(struct cifs_fattr *fattr, const char *path,
fattr->cf_mode |= S_IFIFO;
fattr->cf_dtype = DT_FIFO;
return 0;
} else if (fattr->cf_eof < 8) {
} else if (fattr->cf_eof > 1 && fattr->cf_eof < 8) {
fattr->cf_mode |= S_IFREG;
fattr->cf_dtype = DT_REG;
return -EINVAL; /* EOPNOTSUPP? */
@ -655,6 +655,10 @@ cifs_sfu_type(struct cifs_fattr *fattr, const char *path,
fattr->cf_dtype = DT_REG;
rc = -EOPNOTSUPP;
}
} else if ((rc == 0) && (bytes_read == 1) && (pbuf[0] == '\0')) {
cifs_dbg(FYI, "Socket\n");
fattr->cf_mode |= S_IFSOCK;
fattr->cf_dtype = DT_SOCK;
} else {
fattr->cf_mode |= S_IFREG; /* then it is a file */
fattr->cf_dtype = DT_REG;