diff options
Diffstat (limited to 'fs/cifs/connect.c')
-rw-r--r-- | fs/cifs/connect.c | 123 |
1 files changed, 70 insertions, 53 deletions
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index c8cb83ef6f6..e66297bad41 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -65,6 +65,8 @@ static int ip_connect(struct TCP_Server_Info *server); static int generic_ip_connect(struct TCP_Server_Info *server); static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); static void cifs_prune_tlinks(struct work_struct *work); +static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, + const char *devname); /* * cifs tcp session reconnection @@ -318,9 +320,10 @@ requeue_echo: } static int -cifs_demultiplex_thread(struct TCP_Server_Info *server) +cifs_demultiplex_thread(void *p) { int length; + struct TCP_Server_Info *server = p; unsigned int pdu_length, total_read; struct smb_hdr *smb_buffer = NULL; struct smb_hdr *bigbuf = NULL; @@ -1789,7 +1792,7 @@ cifs_get_tcp_session(struct smb_vol *volume_info) * this will succeed. No need for try_module_get(). */ __module_get(THIS_MODULE); - tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, + tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, tcp_ses, "cifsd"); if (IS_ERR(tcp_ses->tsk)) { rc = PTR_ERR(tcp_ses->tsk); @@ -2240,8 +2243,8 @@ cifs_match_super(struct super_block *sb, void *data) rc = compare_mount_options(sb, mnt_data); out: - cifs_put_tlink(tlink); spin_unlock(&cifs_tcp_ses_lock); + cifs_put_tlink(tlink); return rc; } @@ -2830,15 +2833,9 @@ is_path_accessible(int xid, struct cifs_tcon *tcon, return rc; } -void -cifs_cleanup_volume_info(struct smb_vol **pvolume_info) +static void +cleanup_volume_info_contents(struct smb_vol *volume_info) { - struct smb_vol *volume_info; - - if (!pvolume_info || !*pvolume_info) - return; - - volume_info = *pvolume_info; kfree(volume_info->username); kzfree(volume_info->password); kfree(volume_info->UNC); @@ -2846,28 +2843,44 @@ cifs_cleanup_volume_info(struct smb_vol **pvolume_info) kfree(volume_info->domainname); kfree(volume_info->iocharset); kfree(volume_info->prepath); +} + +void +cifs_cleanup_volume_info(struct smb_vol *volume_info) +{ + if (!volume_info) + return; + cleanup_volume_info_contents(volume_info); kfree(volume_info); - *pvolume_info = NULL; - return; } + #ifdef CONFIG_CIFS_DFS_UPCALL /* build_path_to_root returns full path to root when * we do not have an exiting connection (tcon) */ static char * -build_unc_path_to_root(const struct smb_vol *volume_info, +build_unc_path_to_root(const struct smb_vol *vol, const struct cifs_sb_info *cifs_sb) { - char *full_path; + char *full_path, *pos; + unsigned int pplen = vol->prepath ? strlen(vol->prepath) : 0; + unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); - int unc_len = strnlen(volume_info->UNC, MAX_TREE_SIZE + 1); - full_path = kmalloc(unc_len + 1, GFP_KERNEL); + full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); if (full_path == NULL) return ERR_PTR(-ENOMEM); - strncpy(full_path, volume_info->UNC, unc_len); - full_path[unc_len] = 0; /* add trailing null */ + strncpy(full_path, vol->UNC, unc_len); + pos = full_path + unc_len; + + if (pplen) { + strncpy(pos, vol->prepath, pplen); + pos += pplen; + } + + *pos = '\0'; /* add trailing null */ convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); + cFYI(1, "%s: full_path=%s", __func__, full_path); return full_path; } @@ -2910,15 +2923,18 @@ expand_dfs_referral(int xid, struct cifs_ses *pSesInfo, &fake_devname); free_dfs_info_array(referrals, num_referrals); - kfree(fake_devname); - - if (cifs_sb->mountdata != NULL) - kfree(cifs_sb->mountdata); if (IS_ERR(mdata)) { rc = PTR_ERR(mdata); mdata = NULL; + } else { + cleanup_volume_info_contents(volume_info); + memset(volume_info, '\0', sizeof(*volume_info)); + rc = cifs_setup_volume_info(volume_info, mdata, + fake_devname); } + kfree(fake_devname); + kfree(cifs_sb->mountdata); cifs_sb->mountdata = mdata; } kfree(full_path); @@ -2926,33 +2942,20 @@ expand_dfs_referral(int xid, struct cifs_ses *pSesInfo, } #endif -int cifs_setup_volume_info(struct smb_vol **pvolume_info, char *mount_data, - const char *devname) +static int +cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, + const char *devname) { - struct smb_vol *volume_info; int rc = 0; - *pvolume_info = NULL; - - volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL); - if (!volume_info) { - rc = -ENOMEM; - goto out; - } - - if (cifs_parse_mount_options(mount_data, devname, - volume_info)) { - rc = -EINVAL; - goto out; - } + if (cifs_parse_mount_options(mount_data, devname, volume_info)) + return -EINVAL; if (volume_info->nullauth) { cFYI(1, "null user"); volume_info->username = kzalloc(1, GFP_KERNEL); - if (volume_info->username == NULL) { - rc = -ENOMEM; - goto out; - } + if (volume_info->username == NULL) + return -ENOMEM; } else if (volume_info->username) { /* BB fixme parse for domain name here */ cFYI(1, "Username: %s", volume_info->username); @@ -2960,8 +2963,7 @@ int cifs_setup_volume_info(struct smb_vol **pvolume_info, char *mount_data, cifserror("No username specified"); /* In userspace mount helper we can get user name from alternate locations such as env variables and files on disk */ - rc = -EINVAL; - goto out; + return -EINVAL; } /* this is needed for ASCII cp to Unicode converts */ @@ -2973,18 +2975,32 @@ int cifs_setup_volume_info(struct smb_vol **pvolume_info, char *mount_data, if (volume_info->local_nls == NULL) { cERROR(1, "CIFS mount error: iocharset %s not found", volume_info->iocharset); - rc = -ELIBACC; - goto out; + return -ELIBACC; } } - *pvolume_info = volume_info; - return rc; -out: - cifs_cleanup_volume_info(&volume_info); return rc; } +struct smb_vol * +cifs_get_volume_info(char *mount_data, const char *devname) +{ + int rc; + struct smb_vol *volume_info; + + volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL); + if (!volume_info) + return ERR_PTR(-ENOMEM); + + rc = cifs_setup_volume_info(volume_info, mount_data, devname); + if (rc) { + cifs_cleanup_volume_info(volume_info); + volume_info = ERR_PTR(rc); + } + + return volume_info; +} + int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) { @@ -2997,6 +3013,7 @@ cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) struct tcon_link *tlink; #ifdef CONFIG_CIFS_DFS_UPCALL int referral_walks_count = 0; +#endif rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); if (rc) @@ -3004,6 +3021,7 @@ cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) cifs_sb->bdi.ra_pages = default_backing_dev_info.ra_pages; +#ifdef CONFIG_CIFS_DFS_UPCALL try_mount_again: /* cleanup activities if we're chasing a referral */ if (referral_walks_count) { @@ -3012,7 +3030,6 @@ try_mount_again: else if (pSesInfo) cifs_put_smb_ses(pSesInfo); - cifs_cleanup_volume_info(&volume_info); FreeXid(xid); } #endif @@ -3469,7 +3486,7 @@ cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid) goto out; } - snprintf(username, MAX_USERNAME_SIZE, "krb50x%x", fsuid); + snprintf(username, sizeof(username), "krb50x%x", fsuid); vol_info->username = username; vol_info->local_nls = cifs_sb->local_nls; vol_info->linux_uid = fsuid; |