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-rw-r--r--fs/smbfs/proc.c3509
1 files changed, 3509 insertions, 0 deletions
diff --git a/fs/smbfs/proc.c b/fs/smbfs/proc.c
new file mode 100644
index 00000000000..220babe91ef
--- /dev/null
+++ b/fs/smbfs/proc.c
@@ -0,0 +1,3509 @@
+/*
+ * proc.c
+ *
+ * Copyright (C) 1995, 1996 by Paal-Kr. Engstad and Volker Lendecke
+ * Copyright (C) 1997 by Volker Lendecke
+ *
+ * Please add a note about your changes to smbfs in the ChangeLog file.
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/stat.h>
+#include <linux/fcntl.h>
+#include <linux/dcache.h>
+#include <linux/dirent.h>
+#include <linux/nls.h>
+#include <linux/smp_lock.h>
+#include <linux/net.h>
+#include <linux/vfs.h>
+#include <linux/smb_fs.h>
+#include <linux/smbno.h>
+#include <linux/smb_mount.h>
+
+#include <net/sock.h>
+
+#include <asm/string.h>
+#include <asm/div64.h>
+
+#include "smb_debug.h"
+#include "proto.h"
+#include "request.h"
+
+
+/* Features. Undefine if they cause problems, this should perhaps be a
+ config option. */
+#define SMBFS_POSIX_UNLINK 1
+
+/* Allow smb_retry to be interrupted. */
+#define SMB_RETRY_INTR
+
+#define SMB_VWV(packet) ((packet) + SMB_HEADER_LEN)
+#define SMB_CMD(packet) (*(packet+8))
+#define SMB_WCT(packet) (*(packet+SMB_HEADER_LEN - 1))
+
+#define SMB_DIRINFO_SIZE 43
+#define SMB_STATUS_SIZE 21
+
+#define SMB_ST_BLKSIZE (PAGE_SIZE)
+#define SMB_ST_BLKSHIFT (PAGE_SHIFT)
+
+static struct smb_ops smb_ops_core;
+static struct smb_ops smb_ops_os2;
+static struct smb_ops smb_ops_win95;
+static struct smb_ops smb_ops_winNT;
+static struct smb_ops smb_ops_unix;
+static struct smb_ops smb_ops_null;
+
+static void
+smb_init_dirent(struct smb_sb_info *server, struct smb_fattr *fattr);
+static void
+smb_finish_dirent(struct smb_sb_info *server, struct smb_fattr *fattr);
+static int
+smb_proc_getattr_core(struct smb_sb_info *server, struct dentry *dir,
+ struct smb_fattr *fattr);
+static int
+smb_proc_getattr_ff(struct smb_sb_info *server, struct dentry *dentry,
+ struct smb_fattr *fattr);
+static int
+smb_proc_setattr_core(struct smb_sb_info *server, struct dentry *dentry,
+ u16 attr);
+static int
+smb_proc_setattr_ext(struct smb_sb_info *server,
+ struct inode *inode, struct smb_fattr *fattr);
+static int
+smb_proc_query_cifsunix(struct smb_sb_info *server);
+static void
+install_ops(struct smb_ops *dst, struct smb_ops *src);
+
+
+static void
+str_upper(char *name, int len)
+{
+ while (len--)
+ {
+ if (*name >= 'a' && *name <= 'z')
+ *name -= ('a' - 'A');
+ name++;
+ }
+}
+
+#if 0
+static void
+str_lower(char *name, int len)
+{
+ while (len--)
+ {
+ if (*name >= 'A' && *name <= 'Z')
+ *name += ('a' - 'A');
+ name++;
+ }
+}
+#endif
+
+/* reverse a string inline. This is used by the dircache walking routines */
+static void reverse_string(char *buf, int len)
+{
+ char c;
+ char *end = buf+len-1;
+
+ while(buf < end) {
+ c = *buf;
+ *(buf++) = *end;
+ *(end--) = c;
+ }
+}
+
+/* no conversion, just a wrapper for memcpy. */
+static int convert_memcpy(unsigned char *output, int olen,
+ const unsigned char *input, int ilen,
+ struct nls_table *nls_from,
+ struct nls_table *nls_to)
+{
+ if (olen < ilen)
+ return -ENAMETOOLONG;
+ memcpy(output, input, ilen);
+ return ilen;
+}
+
+static inline int write_char(unsigned char ch, char *output, int olen)
+{
+ if (olen < 4)
+ return -ENAMETOOLONG;
+ sprintf(output, ":x%02x", ch);
+ return 4;
+}
+
+static inline int write_unichar(wchar_t ch, char *output, int olen)
+{
+ if (olen < 5)
+ return -ENAMETOOLONG;
+ sprintf(output, ":%04x", ch);
+ return 5;
+}
+
+/* convert from one "codepage" to another (possibly being utf8). */
+static int convert_cp(unsigned char *output, int olen,
+ const unsigned char *input, int ilen,
+ struct nls_table *nls_from,
+ struct nls_table *nls_to)
+{
+ int len = 0;
+ int n;
+ wchar_t ch;
+
+ while (ilen > 0) {
+ /* convert by changing to unicode and back to the new cp */
+ n = nls_from->char2uni(input, ilen, &ch);
+ if (n == -EINVAL) {
+ ilen--;
+ n = write_char(*input++, output, olen);
+ if (n < 0)
+ goto fail;
+ output += n;
+ olen -= n;
+ len += n;
+ continue;
+ } else if (n < 0)
+ goto fail;
+ input += n;
+ ilen -= n;
+
+ n = nls_to->uni2char(ch, output, olen);
+ if (n == -EINVAL)
+ n = write_unichar(ch, output, olen);
+ if (n < 0)
+ goto fail;
+ output += n;
+ olen -= n;
+
+ len += n;
+ }
+ return len;
+fail:
+ return n;
+}
+
+/* ----------------------------------------------------------- */
+
+/*
+ * nls_unicode
+ *
+ * This encodes/decodes little endian unicode format
+ */
+
+static int uni2char(wchar_t uni, unsigned char *out, int boundlen)
+{
+ if (boundlen < 2)
+ return -EINVAL;
+ *out++ = uni & 0xff;
+ *out++ = uni >> 8;
+ return 2;
+}
+
+static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni)
+{
+ if (boundlen < 2)
+ return -EINVAL;
+ *uni = (rawstring[1] << 8) | rawstring[0];
+ return 2;
+}
+
+static struct nls_table unicode_table = {
+ .charset = "unicode",
+ .uni2char = uni2char,
+ .char2uni = char2uni,
+};
+
+/* ----------------------------------------------------------- */
+
+static int setcodepage(struct nls_table **p, char *name)
+{
+ struct nls_table *nls;
+
+ if (!name || !*name) {
+ nls = NULL;
+ } else if ( (nls = load_nls(name)) == NULL) {
+ printk (KERN_ERR "smbfs: failed to load nls '%s'\n", name);
+ return -EINVAL;
+ }
+
+ /* if already set, unload the previous one. */
+ if (*p && *p != &unicode_table)
+ unload_nls(*p);
+ *p = nls;
+
+ return 0;
+}
+
+/* Handles all changes to codepage settings. */
+int smb_setcodepage(struct smb_sb_info *server, struct smb_nls_codepage *cp)
+{
+ int n = 0;
+
+ smb_lock_server(server);
+
+ /* Don't load any nls_* at all, if no remote is requested */
+ if (!*cp->remote_name)
+ goto out;
+
+ /* local */
+ n = setcodepage(&server->local_nls, cp->local_name);
+ if (n != 0)
+ goto out;
+
+ /* remote */
+ if (!strcmp(cp->remote_name, "unicode")) {
+ server->remote_nls = &unicode_table;
+ } else {
+ n = setcodepage(&server->remote_nls, cp->remote_name);
+ if (n != 0)
+ setcodepage(&server->local_nls, NULL);
+ }
+
+out:
+ if (server->local_nls != NULL && server->remote_nls != NULL)
+ server->ops->convert = convert_cp;
+ else
+ server->ops->convert = convert_memcpy;
+
+ smb_unlock_server(server);
+ return n;
+}
+
+
+/*****************************************************************************/
+/* */
+/* Encoding/Decoding section */
+/* */
+/*****************************************************************************/
+
+static __u8 *
+smb_encode_smb_length(__u8 * p, __u32 len)
+{
+ *p = 0;
+ *(p+1) = 0;
+ *(p+2) = (len & 0xFF00) >> 8;
+ *(p+3) = (len & 0xFF);
+ if (len > 0xFFFF)
+ {
+ *(p+1) = 1;
+ }
+ return p + 4;
+}
+
+/*
+ * smb_build_path: build the path to entry and name storing it in buf.
+ * The path returned will have the trailing '\0'.
+ */
+static int smb_build_path(struct smb_sb_info *server, unsigned char *buf,
+ int maxlen,
+ struct dentry *entry, struct qstr *name)
+{
+ unsigned char *path = buf;
+ int len;
+ int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE) != 0;
+
+ if (maxlen < (2<<unicode))
+ return -ENAMETOOLONG;
+
+ if (maxlen > SMB_MAXPATHLEN + 1)
+ maxlen = SMB_MAXPATHLEN + 1;
+
+ if (entry == NULL)
+ goto test_name_and_out;
+
+ /*
+ * If IS_ROOT, we have to do no walking at all.
+ */
+ if (IS_ROOT(entry) && !name) {
+ *path++ = '\\';
+ if (unicode) *path++ = '\0';
+ *path++ = '\0';
+ if (unicode) *path++ = '\0';
+ return path-buf;
+ }
+
+ /*
+ * Build the path string walking the tree backward from end to ROOT
+ * and store it in reversed order [see reverse_string()]
+ */
+ dget(entry);
+ spin_lock(&entry->d_lock);
+ while (!IS_ROOT(entry)) {
+ struct dentry *parent;
+
+ if (maxlen < (3<<unicode)) {
+ spin_unlock(&entry->d_lock);
+ dput(entry);
+ return -ENAMETOOLONG;
+ }
+
+ len = server->ops->convert(path, maxlen-2,
+ entry->d_name.name, entry->d_name.len,
+ server->local_nls, server->remote_nls);
+ if (len < 0) {
+ spin_unlock(&entry->d_lock);
+ dput(entry);
+ return len;
+ }
+ reverse_string(path, len);
+ path += len;
+ if (unicode) {
+ /* Note: reverse order */
+ *path++ = '\0';
+ maxlen--;
+ }
+ *path++ = '\\';
+ maxlen -= len+1;
+
+ parent = entry->d_parent;
+ dget(parent);
+ spin_unlock(&entry->d_lock);
+ dput(entry);
+ entry = parent;
+ spin_lock(&entry->d_lock);
+ }
+ spin_unlock(&entry->d_lock);
+ dput(entry);
+ reverse_string(buf, path-buf);
+
+ /* maxlen has space for at least one char */
+test_name_and_out:
+ if (name) {
+ if (maxlen < (3<<unicode))
+ return -ENAMETOOLONG;
+ *path++ = '\\';
+ if (unicode) {
+ *path++ = '\0';
+ maxlen--;
+ }
+ len = server->ops->convert(path, maxlen-2,
+ name->name, name->len,
+ server->local_nls, server->remote_nls);
+ if (len < 0)
+ return len;
+ path += len;
+ maxlen -= len+1;
+ }
+ /* maxlen has space for at least one char */
+ *path++ = '\0';
+ if (unicode) *path++ = '\0';
+ return path-buf;
+}
+
+static int smb_encode_path(struct smb_sb_info *server, char *buf, int maxlen,
+ struct dentry *dir, struct qstr *name)
+{
+ int result;
+
+ result = smb_build_path(server, buf, maxlen, dir, name);
+ if (result < 0)
+ goto out;
+ if (server->opt.protocol <= SMB_PROTOCOL_COREPLUS)
+ str_upper(buf, result);
+out:
+ return result;
+}
+
+/* encode_path for non-trans2 request SMBs */
+static int smb_simple_encode_path(struct smb_request *req, char **p,
+ struct dentry * entry, struct qstr * name)
+{
+ struct smb_sb_info *server = req->rq_server;
+ char *s = *p;
+ int res;
+ int maxlen = ((char *)req->rq_buffer + req->rq_bufsize) - s;
+ int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE);
+
+ if (!maxlen)
+ return -ENAMETOOLONG;
+ *s++ = 4; /* ASCII data format */
+
+ /*
+ * SMB Unicode strings must be 16bit aligned relative the start of the
+ * packet. If they are not they must be padded with 0.
+ */
+ if (unicode) {
+ int align = s - (char *)req->rq_buffer;
+ if (!(align & 1)) {
+ *s++ = '\0';
+ maxlen--;
+ }
+ }
+
+ res = smb_encode_path(server, s, maxlen-1, entry, name);
+ if (res < 0)
+ return res;
+ *p = s + res;
+ return 0;
+}
+
+/* The following are taken directly from msdos-fs */
+
+/* Linear day numbers of the respective 1sts in non-leap years. */
+
+static int day_n[] =
+{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, 0};
+ /* JanFebMarApr May Jun Jul Aug Sep Oct Nov Dec */
+
+
+static time_t
+utc2local(struct smb_sb_info *server, time_t time)
+{
+ return time - server->opt.serverzone*60;
+}
+
+static time_t
+local2utc(struct smb_sb_info *server, time_t time)
+{
+ return time + server->opt.serverzone*60;
+}
+
+/* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */
+
+static time_t
+date_dos2unix(struct smb_sb_info *server, __u16 date, __u16 time)
+{
+ int month, year;
+ time_t secs;
+
+ /* first subtract and mask after that... Otherwise, if
+ date == 0, bad things happen */
+ month = ((date >> 5) - 1) & 15;
+ year = date >> 9;
+ secs = (time & 31) * 2 + 60 * ((time >> 5) & 63) + (time >> 11) * 3600 + 86400 *
+ ((date & 31) - 1 + day_n[month] + (year / 4) + year * 365 - ((year & 3) == 0 &&
+ month < 2 ? 1 : 0) + 3653);
+ /* days since 1.1.70 plus 80's leap day */
+ return local2utc(server, secs);
+}
+
+
+/* Convert linear UNIX date to a MS-DOS time/date pair. */
+
+static void
+date_unix2dos(struct smb_sb_info *server,
+ int unix_date, __u16 *date, __u16 *time)
+{
+ int day, year, nl_day, month;
+
+ unix_date = utc2local(server, unix_date);
+ if (unix_date < 315532800)
+ unix_date = 315532800;
+
+ *time = (unix_date % 60) / 2 +
+ (((unix_date / 60) % 60) << 5) +
+ (((unix_date / 3600) % 24) << 11);
+
+ day = unix_date / 86400 - 3652;
+ year = day / 365;
+ if ((year + 3) / 4 + 365 * year > day)
+ year--;
+ day -= (year + 3) / 4 + 365 * year;
+ if (day == 59 && !(year & 3)) {
+ nl_day = day;
+ month = 2;
+ } else {
+ nl_day = (year & 3) || day <= 59 ? day : day - 1;
+ for (month = 0; month < 12; month++)
+ if (day_n[month] > nl_day)
+ break;
+ }
+ *date = nl_day - day_n[month - 1] + 1 + (month << 5) + (year << 9);
+}
+
+/* The following are taken from fs/ntfs/util.c */
+
+#define NTFS_TIME_OFFSET ((u64)(369*365 + 89) * 24 * 3600 * 10000000)
+
+/*
+ * Convert the NT UTC (based 1601-01-01, in hundred nanosecond units)
+ * into Unix UTC (based 1970-01-01, in seconds).
+ */
+static struct timespec
+smb_ntutc2unixutc(u64 ntutc)
+{
+ struct timespec ts;
+ /* FIXME: what about the timezone difference? */
+ /* Subtract the NTFS time offset, then convert to 1s intervals. */
+ u64 t = ntutc - NTFS_TIME_OFFSET;
+ ts.tv_nsec = do_div(t, 10000000) * 100;
+ ts.tv_sec = t;
+ return ts;
+}
+
+/* Convert the Unix UTC into NT time */
+static u64
+smb_unixutc2ntutc(struct timespec ts)
+{
+ /* Note: timezone conversion is probably wrong. */
+ /* return ((u64)utc2local(server, t)) * 10000000 + NTFS_TIME_OFFSET; */
+ return ((u64)ts.tv_sec) * 10000000 + ts.tv_nsec/100 + NTFS_TIME_OFFSET;
+}
+
+#define MAX_FILE_MODE 6
+static mode_t file_mode[] = {
+ S_IFREG, S_IFDIR, S_IFLNK, S_IFCHR, S_IFBLK, S_IFIFO, S_IFSOCK
+};
+
+static int smb_filetype_to_mode(u32 filetype)
+{
+ if (filetype > MAX_FILE_MODE) {
+ PARANOIA("Filetype out of range: %d\n", filetype);
+ return S_IFREG;
+ }
+ return file_mode[filetype];
+}
+
+static u32 smb_filetype_from_mode(int mode)
+{
+ if (S_ISREG(mode))
+ return UNIX_TYPE_FILE;
+ if (S_ISDIR(mode))
+ return UNIX_TYPE_DIR;
+ if (S_ISLNK(mode))
+ return UNIX_TYPE_SYMLINK;
+ if (S_ISCHR(mode))
+ return UNIX_TYPE_CHARDEV;
+ if (S_ISBLK(mode))
+ return UNIX_TYPE_BLKDEV;
+ if (S_ISFIFO(mode))
+ return UNIX_TYPE_FIFO;
+ if (S_ISSOCK(mode))
+ return UNIX_TYPE_SOCKET;
+ return UNIX_TYPE_UNKNOWN;
+}
+
+
+/*****************************************************************************/
+/* */
+/* Support section. */
+/* */
+/*****************************************************************************/
+
+__u32
+smb_len(__u8 * p)
+{
+ return ((*(p+1) & 0x1) << 16L) | (*(p+2) << 8L) | *(p+3);
+}
+
+static __u16
+smb_bcc(__u8 * packet)
+{
+ int pos = SMB_HEADER_LEN + SMB_WCT(packet) * sizeof(__u16);
+ return WVAL(packet, pos);
+}
+
+/* smb_valid_packet: We check if packet fulfills the basic
+ requirements of a smb packet */
+
+static int
+smb_valid_packet(__u8 * packet)
+{
+ return (packet[4] == 0xff
+ && packet[5] == 'S'
+ && packet[6] == 'M'
+ && packet[7] == 'B'
+ && (smb_len(packet) + 4 == SMB_HEADER_LEN
+ + SMB_WCT(packet) * 2 + smb_bcc(packet)));
+}
+
+/* smb_verify: We check if we got the answer we expected, and if we
+ got enough data. If bcc == -1, we don't care. */
+
+static int
+smb_verify(__u8 * packet, int command, int wct, int bcc)
+{
+ if (SMB_CMD(packet) != command)
+ goto bad_command;
+ if (SMB_WCT(packet) < wct)
+ goto bad_wct;
+ if (bcc != -1 && smb_bcc(packet) < bcc)
+ goto bad_bcc;
+ return 0;
+
+bad_command:
+ printk(KERN_ERR "smb_verify: command=%x, SMB_CMD=%x??\n",
+ command, SMB_CMD(packet));
+ goto fail;
+bad_wct:
+ printk(KERN_ERR "smb_verify: command=%x, wct=%d, SMB_WCT=%d??\n",
+ command, wct, SMB_WCT(packet));
+ goto fail;
+bad_bcc:
+ printk(KERN_ERR "smb_verify: command=%x, bcc=%d, SMB_BCC=%d??\n",
+ command, bcc, smb_bcc(packet));
+fail:
+ return -EIO;
+}
+
+/*
+ * Returns the maximum read or write size for the "payload". Making all of the
+ * packet fit within the negotiated max_xmit size.
+ *
+ * N.B. Since this value is usually computed before locking the server,
+ * the server's packet size must never be decreased!
+ */
+static inline int
+smb_get_xmitsize(struct smb_sb_info *server, int overhead)
+{
+ return server->opt.max_xmit - overhead;
+}
+
+/*
+ * Calculate the maximum read size
+ */
+int
+smb_get_rsize(struct smb_sb_info *server)
+{
+ /* readX has 12 parameters, read has 5 */
+ int overhead = SMB_HEADER_LEN + 12 * sizeof(__u16) + 2 + 1 + 2;
+ int size = smb_get_xmitsize(server, overhead);
+
+ VERBOSE("xmit=%d, size=%d\n", server->opt.max_xmit, size);
+
+ return size;
+}
+
+/*
+ * Calculate the maximum write size
+ */
+int
+smb_get_wsize(struct smb_sb_info *server)
+{
+ /* writeX has 14 parameters, write has 5 */
+ int overhead = SMB_HEADER_LEN + 14 * sizeof(__u16) + 2 + 1 + 2;
+ int size = smb_get_xmitsize(server, overhead);
+
+ VERBOSE("xmit=%d, size=%d\n", server->opt.max_xmit, size);
+
+ return size;
+}
+
+/*
+ * Convert SMB error codes to -E... errno values.
+ */
+int
+smb_errno(struct smb_request *req)
+{
+ int errcls = req->rq_rcls;
+ int error = req->rq_err;
+ char *class = "Unknown";
+
+ VERBOSE("errcls %d code %d from command 0x%x\n",
+ errcls, error, SMB_CMD(req->rq_header));
+
+ if (errcls == ERRDOS) {
+ switch (error) {
+ case ERRbadfunc:
+ return -EINVAL;
+ case ERRbadfile:
+ case ERRbadpath:
+ return -ENOENT;
+ case ERRnofids:
+ return -EMFILE;
+ case ERRnoaccess:
+ return -EACCES;
+ case ERRbadfid:
+ return -EBADF;
+ case ERRbadmcb:
+ return -EREMOTEIO;
+ case ERRnomem:
+ return -ENOMEM;
+ case ERRbadmem:
+ return -EFAULT;
+ case ERRbadenv:
+ case ERRbadformat:
+ return -EREMOTEIO;
+ case ERRbadaccess:
+ return -EACCES;
+ case ERRbaddata:
+ return -E2BIG;
+ case ERRbaddrive:
+ return -ENXIO;
+ case ERRremcd:
+ return -EREMOTEIO;
+ case ERRdiffdevice:
+ return -EXDEV;
+ case ERRnofiles:
+ return -ENOENT;
+ case ERRbadshare:
+ return -ETXTBSY;
+ case ERRlock:
+ return -EDEADLK;
+ case ERRfilexists:
+ return -EEXIST;
+ case ERROR_INVALID_PARAMETER:
+ return -EINVAL;
+ case ERROR_DISK_FULL:
+ return -ENOSPC;
+ case ERROR_INVALID_NAME:
+ return -ENOENT;
+ case ERROR_DIR_NOT_EMPTY:
+ return -ENOTEMPTY;
+ case ERROR_NOT_LOCKED:
+ return -ENOLCK;
+ case ERROR_ALREADY_EXISTS:
+ return -EEXIST;
+ default:
+ class = "ERRDOS";
+ goto err_unknown;
+ }
+ } else if (errcls == ERRSRV) {
+ switch (error) {
+ /* N.B. This is wrong ... EIO ? */
+ case ERRerror:
+ return -ENFILE;
+ case ERRbadpw:
+ return -EINVAL;
+ case ERRbadtype:
+ case ERRtimeout:
+ return -EIO;
+ case ERRaccess:
+ return -EACCES;
+ /*
+ * This is a fatal error, as it means the "tree ID"
+ * for this connection is no longer valid. We map
+ * to a special error code and get a new connection.
+ */
+ case ERRinvnid:
+ return -EBADSLT;
+ default:
+ class = "ERRSRV";
+ goto err_unknown;
+ }
+ } else if (errcls == ERRHRD) {
+ switch (error) {
+ case ERRnowrite:
+ return -EROFS;
+ case ERRbadunit:
+ return -ENODEV;
+ case ERRnotready:
+ return -EUCLEAN;
+ case ERRbadcmd:
+ case ERRdata:
+ return -EIO;
+ case ERRbadreq:
+ return -ERANGE;
+ case ERRbadshare:
+ return -ETXTBSY;
+ case ERRlock:
+ return -EDEADLK;
+ case ERRdiskfull:
+ return -ENOSPC;
+ default:
+ class = "ERRHRD";
+ goto err_unknown;
+ }
+ } else if (errcls == ERRCMD) {
+ class = "ERRCMD";
+ } else if (errcls == SUCCESS) {
+ return 0; /* This is the only valid 0 return */
+ }
+
+err_unknown:
+ printk(KERN_ERR "smb_errno: class %s, code %d from command 0x%x\n",
+ class, error, SMB_CMD(req->rq_header));
+ return -EIO;
+}
+
+/* smb_request_ok: We expect the server to be locked. Then we do the
+ request and check the answer completely. When smb_request_ok
+ returns 0, you can be quite sure that everything went well. When
+ the answer is <=0, the returned number is a valid unix errno. */
+
+static int
+smb_request_ok(struct smb_request *req, int command, int wct, int bcc)
+{
+ int result;
+
+ req->rq_resp_wct = wct;
+ req->rq_resp_bcc = bcc;
+
+ result = smb_add_request(req);
+ if (result != 0) {
+ DEBUG1("smb_request failed\n");
+ goto out;
+ }
+
+ if (smb_valid_packet(req->rq_header) != 0) {
+ PARANOIA("invalid packet!\n");
+ goto out;
+ }
+
+ result = smb_verify(req->rq_header, command, wct, bcc);
+
+out:
+ return result;
+}
+
+/*
+ * This implements the NEWCONN ioctl. It installs the server pid,
+ * sets server->state to CONN_VALID, and wakes up the waiting process.
+ */
+int
+smb_newconn(struct smb_sb_info *server, struct smb_conn_opt *opt)
+{
+ struct file *filp;
+ struct sock *sk;
+ int error;
+
+ VERBOSE("fd=%d, pid=%d\n", opt->fd, current->pid);
+
+ smb_lock_server(server);
+
+ /*
+ * Make sure we don't already have a valid connection ...
+ */
+ error = -EINVAL;
+ if (server->state == CONN_VALID)
+ goto out;
+
+ error = -EACCES;
+ if (current->uid != server->mnt->mounted_uid &&
+ !capable(CAP_SYS_ADMIN))
+ goto out;
+
+ error = -EBADF;
+ filp = fget(opt->fd);
+ if (!filp)
+ goto out;
+ if (!smb_valid_socket(filp->f_dentry->d_inode))
+ goto out_putf;
+
+ server->sock_file = filp;
+ server->conn_pid = current->pid;
+ server->opt = *opt;
+ server->generation += 1;
+ server->state = CONN_VALID;
+ error = 0;
+
+ if (server->conn_error) {
+ /*
+ * conn_error is the returncode we originally decided to
+ * drop the old connection on. This message should be positive
+ * and not make people ask questions on why smbfs is printing
+ * error messages ...
+ */
+ printk(KERN_INFO "SMB connection re-established (%d)\n",
+ server->conn_error);
+ server->conn_error = 0;
+ }
+
+ /*
+ * Store the server in sock user_data (Only used by sunrpc)
+ */
+ sk = SOCKET_I(filp->f_dentry->d_inode)->sk;
+ sk->sk_user_data = server;
+
+ /* chain into the data_ready callback */
+ server->data_ready = xchg(&sk->sk_data_ready, smb_data_ready);
+
+ /* check if we have an old smbmount that uses seconds for the
+ serverzone */
+ if (server->opt.serverzone > 12*60 || server->opt.serverzone < -12*60)
+ server->opt.serverzone /= 60;
+
+ /* now that we have an established connection we can detect the server
+ type and enable bug workarounds */
+ if (server->opt.protocol < SMB_PROTOCOL_LANMAN2)
+ install_ops(server->ops, &smb_ops_core);
+ else if (server->opt.protocol == SMB_PROTOCOL_LANMAN2)
+ install_ops(server->ops, &smb_ops_os2);
+ else if (server->opt.protocol == SMB_PROTOCOL_NT1 &&
+ (server->opt.max_xmit < 0x1000) &&
+ !(server->opt.capabilities & SMB_CAP_NT_SMBS)) {
+ /* FIXME: can we kill the WIN95 flag now? */
+ server->mnt->flags |= SMB_MOUNT_WIN95;
+ VERBOSE("detected WIN95 server\n");
+ install_ops(server->ops, &smb_ops_win95);
+ } else {
+ /*
+ * Samba has max_xmit 65535
+ * NT4spX has max_xmit 4536 (or something like that)
+ * win2k has ...
+ */
+ VERBOSE("detected NT1 (Samba, NT4/5) server\n");
+ install_ops(server->ops, &smb_ops_winNT);
+ }
+
+ /* FIXME: the win9x code wants to modify these ... (seek/trunc bug) */
+ if (server->mnt->flags & SMB_MOUNT_OLDATTR) {
+ server->ops->getattr = smb_proc_getattr_core;
+ } else if (server->mnt->flags & SMB_MOUNT_DIRATTR) {
+ server->ops->getattr = smb_proc_getattr_ff;
+ }
+
+ /* Decode server capabilities */
+ if (server->opt.capabilities & SMB_CAP_LARGE_FILES) {
+ /* Should be ok to set this now, as no one can access the
+ mount until the connection has been established. */
+ SB_of(server)->s_maxbytes = ~0ULL >> 1;
+ VERBOSE("LFS enabled\n");
+ }
+ if (server->opt.capabilities & SMB_CAP_UNICODE) {
+ server->mnt->flags |= SMB_MOUNT_UNICODE;
+ VERBOSE("Unicode enabled\n");
+ } else {
+ server->mnt->flags &= ~SMB_MOUNT_UNICODE;
+ }
+#if 0
+ /* flags we may test for other patches ... */
+ if (server->opt.capabilities & SMB_CAP_LARGE_READX) {
+ VERBOSE("Large reads enabled\n");
+ }
+ if (server->opt.capabilities & SMB_CAP_LARGE_WRITEX) {
+ VERBOSE("Large writes enabled\n");
+ }
+#endif
+ if (server->opt.capabilities & SMB_CAP_UNIX) {
+ struct inode *inode;
+ VERBOSE("Using UNIX CIFS extensions\n");
+ install_ops(server->ops, &smb_ops_unix);
+ inode = SB_of(server)->s_root->d_inode;
+ if (inode)
+ inode->i_op = &smb_dir_inode_operations_unix;
+ }
+
+ VERBOSE("protocol=%d, max_xmit=%d, pid=%d capabilities=0x%x\n",
+ server->opt.protocol, server->opt.max_xmit, server->conn_pid,
+ server->opt.capabilities);
+
+ /* FIXME: this really should be done by smbmount. */
+ if (server->opt.max_xmit > SMB_MAX_PACKET_SIZE) {
+ server->opt.max_xmit = SMB_MAX_PACKET_SIZE;
+ }
+
+ smb_unlock_server(server);
+ smbiod_wake_up();
+ if (server->opt.capabilities & SMB_CAP_UNIX)
+ smb_proc_query_cifsunix(server);
+
+ server->conn_complete++;
+ wake_up_interruptible_all(&server->conn_wq);
+ return error;
+
+out:
+ smb_unlock_server(server);
+ smbiod_wake_up();
+ return error;
+
+out_putf:
+ fput(filp);
+ goto out;
+}
+
+/* smb_setup_header: We completely set up the packet. You only have to
+ insert the command-specific fields */
+
+__u8 *
+smb_setup_header(struct smb_request *req, __u8 command, __u16 wct, __u16 bcc)
+{
+ __u32 xmit_len = SMB_HEADER_LEN + wct * sizeof(__u16) + bcc + 2;
+ __u8 *p = req->rq_header;
+ struct smb_sb_info *server = req->rq_server;
+
+ p = smb_encode_smb_length(p, xmit_len - 4);
+
+ *p++ = 0xff;
+ *p++ = 'S';
+ *p++ = 'M';
+ *p++ = 'B';
+ *p++ = command;
+
+ memset(p, '\0', 19);
+ p += 19;
+ p += 8;
+
+ if (server->opt.protocol > SMB_PROTOCOL_CORE) {
+ int flags = SMB_FLAGS_CASELESS_PATHNAMES;
+ int flags2 = SMB_FLAGS2_LONG_PATH_COMPONENTS |
+ SMB_FLAGS2_EXTENDED_ATTRIBUTES; /* EA? not really ... */
+
+ *(req->rq_header + smb_flg) = flags;
+ if (server->mnt->flags & SMB_MOUNT_UNICODE)
+ flags2 |= SMB_FLAGS2_UNICODE_STRINGS;
+ WSET(req->rq_header, smb_flg2, flags2);
+ }
+ *p++ = wct; /* wct */
+ p += 2 * wct;
+ WSET(p, 0, bcc);
+
+ /* Include the header in the data to send */
+ req->rq_iovlen = 1;
+ req->rq_iov[0].iov_base = req->rq_header;
+ req->rq_iov[0].iov_len = xmit_len - bcc;
+
+ return req->rq_buffer;
+}
+
+static void
+smb_setup_bcc(struct smb_request *req, __u8 *p)
+{
+ u16 bcc = p - req->rq_buffer;
+ u8 *pbcc = req->rq_header + SMB_HEADER_LEN + 2*SMB_WCT(req->rq_header);
+
+ WSET(pbcc, 0, bcc);
+
+ smb_encode_smb_length(req->rq_header, SMB_HEADER_LEN +
+ 2*SMB_WCT(req->rq_header) - 2 + bcc);
+
+ /* Include the "bytes" in the data to send */
+ req->rq_iovlen = 2;
+ req->rq_iov[1].iov_base = req->rq_buffer;
+ req->rq_iov[1].iov_len = bcc;
+}
+
+static int
+smb_proc_seek(struct smb_sb_info *server, __u16 fileid,
+ __u16 mode, off_t offset)
+{
+ int result;
+ struct smb_request *req;
+
+ result = -ENOMEM;
+ if (! (req = smb_alloc_request(server, 0)))
+ goto out;
+
+ smb_setup_header(req, SMBlseek, 4, 0);
+ WSET(req->rq_header, smb_vwv0, fileid);
+ WSET(req->rq_header, smb_vwv1, mode);
+ DSET(req->rq_header, smb_vwv2, offset);
+ req->rq_flags |= SMB_REQ_NORETRY;
+
+ result = smb_request_ok(req, SMBlseek, 2, 0);
+ if (result < 0) {
+ result = 0;
+ goto out_free;
+ }
+
+ result = DVAL(req->rq_header, smb_vwv0);
+out_free:
+ smb_rput(req);
+out:
+ return result;
+}
+
+static int
+smb_proc_open(struct smb_sb_info *server, struct dentry *dentry, int wish)
+{
+ struct inode *ino = dentry->d_inode;
+ struct smb_inode_info *ei = SMB_I(ino);
+ int mode, read_write = 0x42, read_only = 0x40;
+ int res;
+ char *p;
+ struct smb_request *req;
+
+ /*
+ * Attempt to open r/w, unless there are no write privileges.
+ */
+ mode = read_write;
+ if (!(ino->i_mode & (S_IWUSR | S_IWGRP | S_IWOTH)))
+ mode = read_only;
+#if 0
+ /* FIXME: why is this code not in? below we fix it so that a caller
+ wanting RO doesn't get RW. smb_revalidate_inode does some
+ optimization based on access mode. tail -f needs it to be correct.
+
+ We must open rw since we don't do the open if called a second time
+ with different 'wish'. Is that not supported by smb servers? */
+ if (!(wish & (O_WRONLY | O_RDWR)))
+ mode = read_only;
+#endif
+
+ res = -ENOMEM;
+ if (! (req = smb_alloc_request(server, PAGE_SIZE)))
+ goto out;
+
+ retry:
+ p = smb_setup_header(req, SMBopen, 2, 0);
+ WSET(req->rq_header, smb_vwv0, mode);
+ WSET(req->rq_header, smb_vwv1, aSYSTEM | aHIDDEN | aDIR);
+ res = smb_simple_encode_path(req, &p, dentry, NULL);
+ if (res < 0)
+ goto out_free;
+ smb_setup_bcc(req, p);
+
+ res = smb_request_ok(req, SMBopen, 7, 0);
+ if (res != 0) {
+ if (mode == read_write &&
+ (res == -EACCES || res == -ETXTBSY || res == -EROFS))
+ {
+ VERBOSE("%s/%s R/W failed, error=%d, retrying R/O\n",
+ DENTRY_PATH(dentry), res);
+ mode = read_only;
+ req->rq_flags = 0;
+ goto retry;
+ }
+ goto out_free;
+ }
+ /* We should now have data in vwv[0..6]. */
+
+ ei->fileid = WVAL(req->rq_header, smb_vwv0);
+ ei->attr = WVAL(req->rq_header, smb_vwv1);
+ /* smb_vwv2 has mtime */
+ /* smb_vwv4 has size */
+ ei->access = (WVAL(req->rq_header, smb_vwv6) & SMB_ACCMASK);
+ ei->open = server->generation;
+
+out_free:
+ smb_rput(req);
+out:
+ return res;
+}
+
+/*
+ * Make sure the file is open, and check that the access
+ * is compatible with the desired access.
+ */
+int
+smb_open(struct dentry *dentry, int wish)
+{
+ struct inode *inode = dentry->d_inode;
+ int result;
+ __u16 access;
+
+ result = -ENOENT;
+ if (!inode) {
+ printk(KERN_ERR "smb_open: no inode for dentry %s/%s\n",
+ DENTRY_PATH(dentry));
+ goto out;
+ }
+
+ if (!smb_is_open(inode)) {
+ struct smb_sb_info *server = server_from_inode(inode);
+ result = 0;
+ if (!smb_is_open(inode))
+ result = smb_proc_open(server, dentry, wish);
+ if (result)
+ goto out;
+ /*
+ * A successful open means the path is still valid ...
+ */
+ smb_renew_times(dentry);
+ }
+
+ /*
+ * Check whether the access is compatible with the desired mode.
+ */
+ result = 0;
+ access = SMB_I(inode)->access;
+ if (access != wish && access != SMB_O_RDWR) {
+ PARANOIA("%s/%s access denied, access=%x, wish=%x\n",
+ DENTRY_PATH(dentry), access, wish);
+ result = -EACCES;
+ }
+out:
+ return result;
+}
+
+static int
+smb_proc_close(struct smb_sb_info *server, __u16 fileid, __u32 mtime)
+{
+ struct smb_request *req;
+ int result = -ENOMEM;
+
+ if (! (req = smb_alloc_request(server, 0)))
+ goto out;
+
+ smb_setup_header(req, SMBclose, 3, 0);
+ WSET(req->rq_header, smb_vwv0, fileid);
+ DSET(req->rq_header, smb_vwv1, utc2local(server, mtime));
+ req->rq_flags |= SMB_REQ_NORETRY;
+ result = smb_request_ok(req, SMBclose, 0, 0);
+
+ smb_rput(req);
+out:
+ return result;
+}
+
+/*
+ * Win NT 4.0 has an apparent bug in that it fails to update the
+ * modify time when writing to a file. As a workaround, we update
+ * both modify and access time locally, and post the times to the
+ * server when closing the file.
+ */
+static int
+smb_proc_close_inode(struct smb_sb_info *server, struct inode * ino)
+{
+ struct smb_inode_info *ei = SMB_I(ino);
+ int result = 0;
+ if (smb_is_open(ino))
+ {
+ /*
+ * We clear the open flag in advance, in case another
+ * process observes the value while we block below.
+ */
+ ei->open = 0;
+
+ /*
+ * Kludge alert: SMB timestamps are accurate only to
+ * two seconds ... round the times to avoid needless
+ * cache invalidations!
+ */
+ if (ino->i_mtime.tv_sec & 1) {
+ ino->i_mtime.tv_sec--;
+ ino->i_mtime.tv_nsec = 0;
+ }
+ if (ino->i_atime.tv_sec & 1) {
+ ino->i_atim