diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/cifs/xattr.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/cifs/xattr.c | 416 |
1 files changed, 0 insertions, 416 deletions
diff --git a/ANDROID_3.4.5/fs/cifs/xattr.c b/ANDROID_3.4.5/fs/cifs/xattr.c deleted file mode 100644 index 10d92cf5..00000000 --- a/ANDROID_3.4.5/fs/cifs/xattr.c +++ /dev/null @@ -1,416 +0,0 @@ -/* - * fs/cifs/xattr.c - * - * Copyright (c) International Business Machines Corp., 2003, 2007 - * Author(s): Steve French (sfrench@us.ibm.com) - * - * This library is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License as published - * by the Free Software Foundation; either version 2.1 of the License, or - * (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See - * the GNU Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public License - * along with this library; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include <linux/fs.h> -#include <linux/posix_acl_xattr.h> -#include <linux/slab.h> -#include <linux/xattr.h> -#include "cifsfs.h" -#include "cifspdu.h" -#include "cifsglob.h" -#include "cifsproto.h" -#include "cifs_debug.h" - -#define MAX_EA_VALUE_SIZE 65535 -#define CIFS_XATTR_DOS_ATTRIB "user.DosAttrib" -#define CIFS_XATTR_CIFS_ACL "system.cifs_acl" - -/* BB need to add server (Samba e.g) support for security and trusted prefix */ - -int cifs_removexattr(struct dentry *direntry, const char *ea_name) -{ - int rc = -EOPNOTSUPP; -#ifdef CONFIG_CIFS_XATTR - int xid; - struct cifs_sb_info *cifs_sb; - struct tcon_link *tlink; - struct cifs_tcon *pTcon; - struct super_block *sb; - char *full_path = NULL; - - if (direntry == NULL) - return -EIO; - if (direntry->d_inode == NULL) - return -EIO; - sb = direntry->d_inode->i_sb; - if (sb == NULL) - return -EIO; - - cifs_sb = CIFS_SB(sb); - tlink = cifs_sb_tlink(cifs_sb); - if (IS_ERR(tlink)) - return PTR_ERR(tlink); - pTcon = tlink_tcon(tlink); - - xid = GetXid(); - - full_path = build_path_from_dentry(direntry); - if (full_path == NULL) { - rc = -ENOMEM; - goto remove_ea_exit; - } - if (ea_name == NULL) { - cFYI(1, "Null xattr names not supported"); - } else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) - && (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN))) { - cFYI(1, - "illegal xattr request %s (only user namespace supported)", - ea_name); - /* BB what if no namespace prefix? */ - /* Should we just pass them to server, except for - system and perhaps security prefixes? */ - } else { - if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) - goto remove_ea_exit; - - ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */ - rc = CIFSSMBSetEA(xid, pTcon, full_path, ea_name, NULL, - (__u16)0, cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); - } -remove_ea_exit: - kfree(full_path); - FreeXid(xid); - cifs_put_tlink(tlink); -#endif - return rc; -} - -int cifs_setxattr(struct dentry *direntry, const char *ea_name, - const void *ea_value, size_t value_size, int flags) -{ - int rc = -EOPNOTSUPP; -#ifdef CONFIG_CIFS_XATTR - int xid; - struct cifs_sb_info *cifs_sb; - struct tcon_link *tlink; - struct cifs_tcon *pTcon; - struct super_block *sb; - char *full_path; - - if (direntry == NULL) - return -EIO; - if (direntry->d_inode == NULL) - return -EIO; - sb = direntry->d_inode->i_sb; - if (sb == NULL) - return -EIO; - - cifs_sb = CIFS_SB(sb); - tlink = cifs_sb_tlink(cifs_sb); - if (IS_ERR(tlink)) - return PTR_ERR(tlink); - pTcon = tlink_tcon(tlink); - - xid = GetXid(); - - full_path = build_path_from_dentry(direntry); - if (full_path == NULL) { - rc = -ENOMEM; - goto set_ea_exit; - } - /* return dos attributes as pseudo xattr */ - /* return alt name if available as pseudo attr */ - - /* if proc/fs/cifs/streamstoxattr is set then - search server for EAs or streams to - returns as xattrs */ - if (value_size > MAX_EA_VALUE_SIZE) { - cFYI(1, "size of EA value too large"); - rc = -EOPNOTSUPP; - goto set_ea_exit; - } - - if (ea_name == NULL) { - cFYI(1, "Null xattr names not supported"); - } else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) - == 0) { - if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) - goto set_ea_exit; - if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0) - cFYI(1, "attempt to set cifs inode metadata"); - - ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */ - rc = CIFSSMBSetEA(xid, pTcon, full_path, ea_name, ea_value, - (__u16)value_size, cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); - } else if (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) - == 0) { - if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) - goto set_ea_exit; - - ea_name += XATTR_OS2_PREFIX_LEN; /* skip past os2. prefix */ - rc = CIFSSMBSetEA(xid, pTcon, full_path, ea_name, ea_value, - (__u16)value_size, cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); - } else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL, - strlen(CIFS_XATTR_CIFS_ACL)) == 0) { -#ifdef CONFIG_CIFS_ACL - struct cifs_ntsd *pacl; - pacl = kmalloc(value_size, GFP_KERNEL); - if (!pacl) { - cFYI(1, "%s: Can't allocate memory for ACL", - __func__); - rc = -ENOMEM; - } else { - memcpy(pacl, ea_value, value_size); - rc = set_cifs_acl(pacl, value_size, - direntry->d_inode, full_path, CIFS_ACL_DACL); - if (rc == 0) /* force revalidate of the inode */ - CIFS_I(direntry->d_inode)->time = 0; - kfree(pacl); - } -#else - cFYI(1, "Set CIFS ACL not supported yet"); -#endif /* CONFIG_CIFS_ACL */ - } else { - int temp; - temp = strncmp(ea_name, POSIX_ACL_XATTR_ACCESS, - strlen(POSIX_ACL_XATTR_ACCESS)); - if (temp == 0) { -#ifdef CONFIG_CIFS_POSIX - if (sb->s_flags & MS_POSIXACL) - rc = CIFSSMBSetPosixACL(xid, pTcon, full_path, - ea_value, (const int)value_size, - ACL_TYPE_ACCESS, cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); - cFYI(1, "set POSIX ACL rc %d", rc); -#else - cFYI(1, "set POSIX ACL not supported"); -#endif - } else if (strncmp(ea_name, POSIX_ACL_XATTR_DEFAULT, - strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) { -#ifdef CONFIG_CIFS_POSIX - if (sb->s_flags & MS_POSIXACL) - rc = CIFSSMBSetPosixACL(xid, pTcon, full_path, - ea_value, (const int)value_size, - ACL_TYPE_DEFAULT, cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); - cFYI(1, "set POSIX default ACL rc %d", rc); -#else - cFYI(1, "set default POSIX ACL not supported"); -#endif - } else { - cFYI(1, "illegal xattr request %s (only user namespace" - " supported)", ea_name); - /* BB what if no namespace prefix? */ - /* Should we just pass them to server, except for - system and perhaps security prefixes? */ - } - } - -set_ea_exit: - kfree(full_path); - FreeXid(xid); - cifs_put_tlink(tlink); -#endif - return rc; -} - -ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name, - void *ea_value, size_t buf_size) -{ - ssize_t rc = -EOPNOTSUPP; -#ifdef CONFIG_CIFS_XATTR - int xid; - struct cifs_sb_info *cifs_sb; - struct tcon_link *tlink; - struct cifs_tcon *pTcon; - struct super_block *sb; - char *full_path; - - if (direntry == NULL) - return -EIO; - if (direntry->d_inode == NULL) - return -EIO; - sb = direntry->d_inode->i_sb; - if (sb == NULL) - return -EIO; - - cifs_sb = CIFS_SB(sb); - tlink = cifs_sb_tlink(cifs_sb); - if (IS_ERR(tlink)) - return PTR_ERR(tlink); - pTcon = tlink_tcon(tlink); - - xid = GetXid(); - - full_path = build_path_from_dentry(direntry); - if (full_path == NULL) { - rc = -ENOMEM; - goto get_ea_exit; - } - /* return dos attributes as pseudo xattr */ - /* return alt name if available as pseudo attr */ - if (ea_name == NULL) { - cFYI(1, "Null xattr names not supported"); - } else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) - == 0) { - if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) - goto get_ea_exit; - - if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0) { - cFYI(1, "attempt to query cifs inode metadata"); - /* revalidate/getattr then populate from inode */ - } /* BB add else when above is implemented */ - ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */ - rc = CIFSSMBQAllEAs(xid, pTcon, full_path, ea_name, ea_value, - buf_size, cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); - } else if (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) == 0) { - if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) - goto get_ea_exit; - - ea_name += XATTR_OS2_PREFIX_LEN; /* skip past os2. prefix */ - rc = CIFSSMBQAllEAs(xid, pTcon, full_path, ea_name, ea_value, - buf_size, cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); - } else if (strncmp(ea_name, POSIX_ACL_XATTR_ACCESS, - strlen(POSIX_ACL_XATTR_ACCESS)) == 0) { -#ifdef CONFIG_CIFS_POSIX - if (sb->s_flags & MS_POSIXACL) - rc = CIFSSMBGetPosixACL(xid, pTcon, full_path, - ea_value, buf_size, ACL_TYPE_ACCESS, - cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); -#else - cFYI(1, "Query POSIX ACL not supported yet"); -#endif /* CONFIG_CIFS_POSIX */ - } else if (strncmp(ea_name, POSIX_ACL_XATTR_DEFAULT, - strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) { -#ifdef CONFIG_CIFS_POSIX - if (sb->s_flags & MS_POSIXACL) - rc = CIFSSMBGetPosixACL(xid, pTcon, full_path, - ea_value, buf_size, ACL_TYPE_DEFAULT, - cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); -#else - cFYI(1, "Query POSIX default ACL not supported yet"); -#endif /* CONFIG_CIFS_POSIX */ - } else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL, - strlen(CIFS_XATTR_CIFS_ACL)) == 0) { -#ifdef CONFIG_CIFS_ACL - u32 acllen; - struct cifs_ntsd *pacl; - - pacl = get_cifs_acl(cifs_sb, direntry->d_inode, - full_path, &acllen); - if (IS_ERR(pacl)) { - rc = PTR_ERR(pacl); - cERROR(1, "%s: error %zd getting sec desc", - __func__, rc); - } else { - if (ea_value) { - if (acllen > buf_size) - acllen = -ERANGE; - else - memcpy(ea_value, pacl, acllen); - } - rc = acllen; - kfree(pacl); - } -#else - cFYI(1, "Query CIFS ACL not supported yet"); -#endif /* CONFIG_CIFS_ACL */ - } else if (strncmp(ea_name, - XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) == 0) { - cFYI(1, "Trusted xattr namespace not supported yet"); - } else if (strncmp(ea_name, - XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) == 0) { - cFYI(1, "Security xattr namespace not supported yet"); - } else - cFYI(1, - "illegal xattr request %s (only user namespace supported)", - ea_name); - - /* We could add an additional check for streams ie - if proc/fs/cifs/streamstoxattr is set then - search server for EAs or streams to - returns as xattrs */ - - if (rc == -EINVAL) - rc = -EOPNOTSUPP; - -get_ea_exit: - kfree(full_path); - FreeXid(xid); - cifs_put_tlink(tlink); -#endif - return rc; -} - -ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size) -{ - ssize_t rc = -EOPNOTSUPP; -#ifdef CONFIG_CIFS_XATTR - int xid; - struct cifs_sb_info *cifs_sb; - struct tcon_link *tlink; - struct cifs_tcon *pTcon; - struct super_block *sb; - char *full_path; - - if (direntry == NULL) - return -EIO; - if (direntry->d_inode == NULL) - return -EIO; - sb = direntry->d_inode->i_sb; - if (sb == NULL) - return -EIO; - - cifs_sb = CIFS_SB(sb); - if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) - return -EOPNOTSUPP; - - tlink = cifs_sb_tlink(cifs_sb); - if (IS_ERR(tlink)) - return PTR_ERR(tlink); - pTcon = tlink_tcon(tlink); - - xid = GetXid(); - - full_path = build_path_from_dentry(direntry); - if (full_path == NULL) { - rc = -ENOMEM; - goto list_ea_exit; - } - /* return dos attributes as pseudo xattr */ - /* return alt name if available as pseudo attr */ - - /* if proc/fs/cifs/streamstoxattr is set then - search server for EAs or streams to - returns as xattrs */ - rc = CIFSSMBQAllEAs(xid, pTcon, full_path, NULL, data, - buf_size, cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); - -list_ea_exit: - kfree(full_path); - FreeXid(xid); - cifs_put_tlink(tlink); -#endif - return rc; -} |