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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/cifs/xattr.c | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'fs/cifs/xattr.c')
-rw-r--r-- | fs/cifs/xattr.c | 334 |
1 files changed, 334 insertions, 0 deletions
diff --git a/fs/cifs/xattr.c b/fs/cifs/xattr.c new file mode 100644 index 0000000..549afa1 --- /dev/null +++ b/fs/cifs/xattr.c @@ -0,0 +1,334 @@ +/* + * fs/cifs/xattr.c + * + * Copyright (c) International Business Machines Corp., 2003 + * 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 "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_USER_PREFIX "user." +#define CIFS_XATTR_SYSTEM_PREFIX "system." +#define CIFS_XATTR_OS2_PREFIX "os2." +#define CIFS_XATTR_SECURITY_PREFIX ".security" +#define CIFS_XATTR_TRUSTED_PREFIX "trusted." +#define XATTR_TRUSTED_PREFIX_LEN 8 +#define XATTR_SECURITY_PREFIX_LEN 9 +/* 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 cifsTconInfo *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; + xid = GetXid(); + + cifs_sb = CIFS_SB(sb); + pTcon = cifs_sb->tcon; + + down(&sb->s_vfs_rename_sem); + full_path = build_path_from_dentry(direntry); + up(&sb->s_vfs_rename_sem); + if(full_path == NULL) { + FreeXid(xid); + return -ENOMEM; + } + if(ea_name == NULL) { + cFYI(1,("Null xattr names not supported")); + } else if(strncmp(ea_name,CIFS_XATTR_USER_PREFIX,5) + && (strncmp(ea_name,CIFS_XATTR_OS2_PREFIX,4))) { + cFYI(1,("illegal xattr namespace %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+=5; /* skip past user. prefix */ + rc = CIFSSMBSetEA(xid,pTcon,full_path,ea_name,NULL, + (__u16)0, cifs_sb->local_nls); + } +remove_ea_exit: + if (full_path) + kfree(full_path); + FreeXid(xid); +#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 cifsTconInfo *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; + xid = GetXid(); + + cifs_sb = CIFS_SB(sb); + pTcon = cifs_sb->tcon; + + down(&sb->s_vfs_rename_sem); + full_path = build_path_from_dentry(direntry); + up(&sb->s_vfs_rename_sem); + if(full_path == NULL) { + FreeXid(xid); + return -ENOMEM; + } + /* 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")); + if(full_path) + kfree(full_path); + FreeXid(xid); + return -EOPNOTSUPP; + } + + if(ea_name == NULL) { + cFYI(1,("Null xattr names not supported")); + } else if(strncmp(ea_name,CIFS_XATTR_USER_PREFIX,5) == 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 += 5; /* skip past user. prefix */ + rc = CIFSSMBSetEA(xid,pTcon,full_path,ea_name,ea_value, + (__u16)value_size, cifs_sb->local_nls); + } else if(strncmp(ea_name, CIFS_XATTR_OS2_PREFIX,4) == 0) { + if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) + goto set_ea_exit; + + ea_name += 4; /* skip past os2. prefix */ + rc = CIFSSMBSetEA(xid,pTcon,full_path,ea_name,ea_value, + (__u16)value_size, cifs_sb->local_nls); + } else { + int temp; + temp = strncmp(ea_name,POSIX_ACL_XATTR_ACCESS, + strlen(POSIX_ACL_XATTR_ACCESS)); + if (temp == 0) { +#ifdef CONFIG_CIFS_POSIX + rc = CIFSSMBSetPosixACL(xid, pTcon,full_path,ea_value, + (const int)value_size, ACL_TYPE_ACCESS, + cifs_sb->local_nls); + 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 + rc = CIFSSMBSetPosixACL(xid, pTcon,full_path,ea_value, + (const int)value_size, ACL_TYPE_DEFAULT, + cifs_sb->local_nls); + 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: + if (full_path) + kfree(full_path); + FreeXid(xid); +#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 cifsTconInfo *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; + + xid = GetXid(); + + cifs_sb = CIFS_SB(sb); + pTcon = cifs_sb->tcon; + + down(&sb->s_vfs_rename_sem); + full_path = build_path_from_dentry(direntry); + up(&sb->s_vfs_rename_sem); + if(full_path == NULL) { + FreeXid(xid); + return -ENOMEM; + } + /* 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,CIFS_XATTR_USER_PREFIX,5) == 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 += 5; /* skip past user. prefix */ + rc = CIFSSMBQueryEA(xid,pTcon,full_path,ea_name,ea_value, + buf_size, cifs_sb->local_nls); + } else if(strncmp(ea_name, CIFS_XATTR_OS2_PREFIX,4) == 0) { + if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) + goto get_ea_exit; + + ea_name += 4; /* skip past os2. prefix */ + rc = CIFSSMBQueryEA(xid,pTcon,full_path,ea_name,ea_value, + buf_size, cifs_sb->local_nls); + } else if(strncmp(ea_name,POSIX_ACL_XATTR_ACCESS,strlen(POSIX_ACL_XATTR_ACCESS)) == 0) { +#ifdef CONFIG_CIFS_POSIX + rc = CIFSSMBGetPosixACL(xid, pTcon, full_path, + ea_value, buf_size, ACL_TYPE_ACCESS, + cifs_sb->local_nls); +#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 + rc = CIFSSMBGetPosixACL(xid, pTcon, full_path, + ea_value, buf_size, ACL_TYPE_DEFAULT, + cifs_sb->local_nls); +#else + cFYI(1,("query POSIX default ACL not supported yet")); +#endif + } else if(strncmp(ea_name, + CIFS_XATTR_TRUSTED_PREFIX,XATTR_TRUSTED_PREFIX_LEN) == 0) { + cFYI(1,("Trusted xattr namespace not supported yet")); + } else if(strncmp(ea_name, + CIFS_XATTR_SECURITY_PREFIX,XATTR_SECURITY_PREFIX_LEN) == 0) { + cFYI(1,("Security xattr namespace not supported yet")); + } else { + cFYI(1,("illegal xattr name 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: + if (full_path) + kfree(full_path); + FreeXid(xid); +#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 cifsTconInfo *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; + xid = GetXid(); + + cifs_sb = CIFS_SB(sb); + pTcon = cifs_sb->tcon; + + down(&sb->s_vfs_rename_sem); + full_path = build_path_from_dentry(direntry); + up(&sb->s_vfs_rename_sem); + if(full_path == NULL) { + FreeXid(xid); + return -ENOMEM; + } + /* 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,data,buf_size, + cifs_sb->local_nls); + + if (full_path) + kfree(full_path); + FreeXid(xid); +#endif + return rc; +} |