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fs/xattr.c
17.7 KB
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/* File: fs/xattr.c Extended attribute handling. Copyright (C) 2001 by Andreas Gruenbacher <a.gruenbacher@computer.org> Copyright (C) 2001 SGI - Silicon Graphics, Inc <linux-xfs@oss.sgi.com> Copyright (c) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com> */ #include <linux/fs.h> #include <linux/slab.h> |
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#include <linux/file.h> #include <linux/xattr.h> |
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#include <linux/mount.h> |
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#include <linux/namei.h> #include <linux/security.h> |
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#include <linux/evm.h> |
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#include <linux/syscalls.h> |
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#include <linux/export.h> |
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#include <linux/fsnotify.h> |
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#include <linux/audit.h> |
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#include <linux/vmalloc.h> |
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|
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#include <asm/uaccess.h> |
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/* * Check permissions for extended attribute access. This is a bit complicated * because different namespaces have very different rules. */ static int xattr_permission(struct inode *inode, const char *name, int mask) { /* * We can never set or remove an extended attribute on a read-only * filesystem or on an immutable / append-only inode. */ if (mask & MAY_WRITE) { |
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if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) return -EPERM; } /* * No restriction for security.* and system.* from the VFS. Decision * on these is left to the underlying filesystem / security module. */ if (!strncmp(name, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) || !strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) return 0; /* |
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* The trusted.* namespace can only be accessed by privileged users. |
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*/ |
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if (!strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN)) { if (!capable(CAP_SYS_ADMIN)) return (mask & MAY_WRITE) ? -EPERM : -ENODATA; return 0; } |
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|
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/* * In the user.* namespace, only regular files and directories can have |
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* extended attributes. For sticky directories, only the owner and |
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* privileged users can write attributes. |
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*/ |
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if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) { |
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if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode)) |
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return (mask & MAY_WRITE) ? -EPERM : -ENODATA; |
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if (S_ISDIR(inode->i_mode) && (inode->i_mode & S_ISVTX) && |
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(mask & MAY_WRITE) && !inode_owner_or_capable(inode)) |
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return -EPERM; } |
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return inode_permission(inode, mask); |
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} |
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/** * __vfs_setxattr_noperm - perform setxattr operation without performing * permission checks. * * @dentry - object to perform setxattr on * @name - xattr name to set * @value - value to set @name to * @size - size of @value * @flags - flags to pass into filesystem operations * * returns the result of the internal setxattr or setsecurity operations. * * This function requires the caller to lock the inode's i_mutex before it * is executed. It also assumes that the caller will make the appropriate * permission checks. */ int __vfs_setxattr_noperm(struct dentry *dentry, const char *name, const void *value, size_t size, int flags) |
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{ struct inode *inode = dentry->d_inode; |
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int error = -EOPNOTSUPP; |
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int issec = !strncmp(name, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN); |
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|
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if (issec) inode->i_flags &= ~S_NOSEC; |
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if (inode->i_op->setxattr) { error = inode->i_op->setxattr(dentry, name, value, size, flags); if (!error) { fsnotify_xattr(dentry); security_inode_post_setxattr(dentry, name, value, size, flags); } |
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} else if (issec) { |
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const char *suffix = name + XATTR_SECURITY_PREFIX_LEN; |
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error = security_inode_setsecurity(inode, suffix, value, size, flags); if (!error) fsnotify_xattr(dentry); } |
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return error; } int vfs_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags) { struct inode *inode = dentry->d_inode; int error; error = xattr_permission(inode, name, MAY_WRITE); if (error) return error; mutex_lock(&inode->i_mutex); error = security_inode_setxattr(dentry, name, value, size, flags); if (error) goto out; error = __vfs_setxattr_noperm(dentry, name, value, size, flags); |
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out: mutex_unlock(&inode->i_mutex); return error; } EXPORT_SYMBOL_GPL(vfs_setxattr); ssize_t |
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xattr_getsecurity(struct inode *inode, const char *name, void *value, size_t size) { void *buffer = NULL; ssize_t len; if (!value || !size) { len = security_inode_getsecurity(inode, name, &buffer, false); goto out_noalloc; } len = security_inode_getsecurity(inode, name, &buffer, true); if (len < 0) return len; if (size < len) { len = -ERANGE; goto out; } memcpy(value, buffer, len); out: security_release_secctx(buffer, len); out_noalloc: return len; } EXPORT_SYMBOL_GPL(xattr_getsecurity); |
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/* * vfs_getxattr_alloc - allocate memory, if necessary, before calling getxattr * * Allocate memory, if not already allocated, or re-allocate correct size, * before retrieving the extended attribute. * * Returns the result of alloc, if failed, or the getxattr operation. */ ssize_t vfs_getxattr_alloc(struct dentry *dentry, const char *name, char **xattr_value, size_t xattr_size, gfp_t flags) { struct inode *inode = dentry->d_inode; char *value = *xattr_value; int error; error = xattr_permission(inode, name, MAY_READ); if (error) return error; if (!inode->i_op->getxattr) return -EOPNOTSUPP; error = inode->i_op->getxattr(dentry, name, NULL, 0); if (error < 0) return error; if (!value || (error > xattr_size)) { value = krealloc(*xattr_value, error + 1, flags); if (!value) return -ENOMEM; memset(value, 0, error + 1); } error = inode->i_op->getxattr(dentry, name, value, error); *xattr_value = value; return error; } /* Compare an extended attribute value with the given value */ int vfs_xattr_cmp(struct dentry *dentry, const char *xattr_name, const char *value, size_t size, gfp_t flags) { char *xattr_value = NULL; int rc; rc = vfs_getxattr_alloc(dentry, xattr_name, &xattr_value, 0, flags); if (rc < 0) return rc; if ((rc != size) || (memcmp(xattr_value, value, rc) != 0)) rc = -EINVAL; else rc = 0; kfree(xattr_value); return rc; } |
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ssize_t |
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vfs_getxattr(struct dentry *dentry, const char *name, void *value, size_t size) |
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{ struct inode *inode = dentry->d_inode; int error; |
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error = xattr_permission(inode, name, MAY_READ); if (error) return error; |
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error = security_inode_getxattr(dentry, name); if (error) return error; |
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if (!strncmp(name, XATTR_SECURITY_PREFIX, |
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XATTR_SECURITY_PREFIX_LEN)) { const char *suffix = name + XATTR_SECURITY_PREFIX_LEN; |
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int ret = xattr_getsecurity(inode, suffix, value, size); |
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/* * Only overwrite the return value if a security module * is actually active. */ |
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if (ret == -EOPNOTSUPP) goto nolsm; return ret; |
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} |
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nolsm: if (inode->i_op->getxattr) error = inode->i_op->getxattr(dentry, name, value, size); else error = -EOPNOTSUPP; |
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return error; } EXPORT_SYMBOL_GPL(vfs_getxattr); |
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ssize_t vfs_listxattr(struct dentry *d, char *list, size_t size) { ssize_t error; error = security_inode_listxattr(d); if (error) return error; error = -EOPNOTSUPP; |
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if (d->d_inode->i_op->listxattr) { |
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error = d->d_inode->i_op->listxattr(d, list, size); } else { error = security_inode_listsecurity(d->d_inode, list, size); if (size && error > size) error = -ERANGE; } return error; } EXPORT_SYMBOL_GPL(vfs_listxattr); |
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int |
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vfs_removexattr(struct dentry *dentry, const char *name) |
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{ struct inode *inode = dentry->d_inode; int error; if (!inode->i_op->removexattr) return -EOPNOTSUPP; |
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error = xattr_permission(inode, name, MAY_WRITE); if (error) return error; |
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error = security_inode_removexattr(dentry, name); if (error) return error; mutex_lock(&inode->i_mutex); error = inode->i_op->removexattr(dentry, name); mutex_unlock(&inode->i_mutex); |
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if (!error) { |
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fsnotify_xattr(dentry); |
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evm_inode_post_removexattr(dentry, name); } |
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return error; } EXPORT_SYMBOL_GPL(vfs_removexattr); |
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/* * Extended attribute SET operations */ static long |
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setxattr(struct dentry *d, const char __user *name, const void __user *value, |
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size_t size, int flags) { int error; void *kvalue = NULL; |
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void *vvalue = NULL; /* If non-NULL, we used vmalloc() */ |
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char kname[XATTR_NAME_MAX + 1]; if (flags & ~(XATTR_CREATE|XATTR_REPLACE)) return -EINVAL; error = strncpy_from_user(kname, name, sizeof(kname)); if (error == 0 || error == sizeof(kname)) error = -ERANGE; if (error < 0) return error; if (size) { if (size > XATTR_SIZE_MAX) return -E2BIG; |
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kvalue = kmalloc(size, GFP_KERNEL | __GFP_NOWARN); if (!kvalue) { vvalue = vmalloc(size); if (!vvalue) return -ENOMEM; kvalue = vvalue; } if (copy_from_user(kvalue, value, size)) { error = -EFAULT; goto out; } |
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} |
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error = vfs_setxattr(d, kname, kvalue, size, flags); |
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out: if (vvalue) vfree(vvalue); else kfree(kvalue); |
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return error; } |
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SYSCALL_DEFINE5(setxattr, const char __user *, pathname, const char __user *, name, const void __user *, value, size_t, size, int, flags) |
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{ |
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struct path path; |
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int error; |
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error = user_path(pathname, &path); |
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if (error) return error; |
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error = mnt_want_write(path.mnt); |
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if (!error) { |
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error = setxattr(path.dentry, name, value, size, flags); mnt_drop_write(path.mnt); |
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} |
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path_put(&path); |
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return error; } |
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SYSCALL_DEFINE5(lsetxattr, const char __user *, pathname, const char __user *, name, const void __user *, value, size_t, size, int, flags) |
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{ |
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struct path path; |
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int error; |
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error = user_lpath(pathname, &path); |
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if (error) return error; |
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error = mnt_want_write(path.mnt); |
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if (!error) { |
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error = setxattr(path.dentry, name, value, size, flags); mnt_drop_write(path.mnt); |
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} |
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path_put(&path); |
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return error; } |
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SYSCALL_DEFINE5(fsetxattr, int, fd, const char __user *, name, const void __user *,value, size_t, size, int, flags) |
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{ struct file *f; |
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struct dentry *dentry; |
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int error = -EBADF; f = fget(fd); if (!f) return error; |
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dentry = f->f_path.dentry; |
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audit_inode(NULL, dentry); |
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error = mnt_want_write_file(f); |
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if (!error) { error = setxattr(dentry, name, value, size, flags); |
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mnt_drop_write_file(f); |
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} |
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fput(f); return error; } /* * Extended attribute GET operations */ static ssize_t |
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getxattr(struct dentry *d, const char __user *name, void __user *value, size_t size) |
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{ ssize_t error; void *kvalue = NULL; char kname[XATTR_NAME_MAX + 1]; error = strncpy_from_user(kname, name, sizeof(kname)); if (error == 0 || error == sizeof(kname)) error = -ERANGE; if (error < 0) return error; if (size) { if (size > XATTR_SIZE_MAX) size = XATTR_SIZE_MAX; |
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kvalue = kzalloc(size, GFP_KERNEL); |
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if (!kvalue) return -ENOMEM; } |
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error = vfs_getxattr(d, kname, kvalue, size); |
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if (error > 0) { if (size && copy_to_user(value, kvalue, error)) error = -EFAULT; } else if (error == -ERANGE && size >= XATTR_SIZE_MAX) { /* The file system tried to returned a value bigger than XATTR_SIZE_MAX bytes. Not possible. */ error = -E2BIG; |
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} |
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kfree(kvalue); |
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return error; } |
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SYSCALL_DEFINE4(getxattr, const char __user *, pathname, const char __user *, name, void __user *, value, size_t, size) |
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{ |
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struct path path; |
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ssize_t error; |
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error = user_path(pathname, &path); |
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if (error) return error; |
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error = getxattr(path.dentry, name, value, size); path_put(&path); |
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return error; } |
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SYSCALL_DEFINE4(lgetxattr, const char __user *, pathname, const char __user *, name, void __user *, value, size_t, size) |
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{ |
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struct path path; |
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ssize_t error; |
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error = user_lpath(pathname, &path); |
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if (error) return error; |
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error = getxattr(path.dentry, name, value, size); path_put(&path); |
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return error; } |
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SYSCALL_DEFINE4(fgetxattr, int, fd, const char __user *, name, void __user *, value, size_t, size) |
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{ struct file *f; ssize_t error = -EBADF; f = fget(fd); if (!f) return error; |
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audit_inode(NULL, f->f_path.dentry); |
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error = getxattr(f->f_path.dentry, name, value, size); |
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fput(f); return error; } /* * Extended attribute LIST operations */ static ssize_t listxattr(struct dentry *d, char __user *list, size_t size) { ssize_t error; char *klist = NULL; |
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char *vlist = NULL; /* If non-NULL, we used vmalloc() */ |
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if (size) { if (size > XATTR_LIST_MAX) size = XATTR_LIST_MAX; |
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klist = kmalloc(size, __GFP_NOWARN | GFP_KERNEL); |
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if (!klist) { vlist = vmalloc(size); if (!vlist) return -ENOMEM; klist = vlist; } |
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} |
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error = vfs_listxattr(d, klist, size); |
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if (error > 0) { if (size && copy_to_user(list, klist, error)) error = -EFAULT; } else if (error == -ERANGE && size >= XATTR_LIST_MAX) { /* The file system tried to returned a list bigger than XATTR_LIST_MAX bytes. Not possible. */ error = -E2BIG; |
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} |
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if (vlist) vfree(vlist); else kfree(klist); |
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return error; } |
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510 511 |
SYSCALL_DEFINE3(listxattr, const char __user *, pathname, char __user *, list, size_t, size) |
1da177e4c Linux-2.6.12-rc2 |
512 |
{ |
2d8f30380 [PATCH] sanitize ... |
513 |
struct path path; |
1da177e4c Linux-2.6.12-rc2 |
514 |
ssize_t error; |
2d8f30380 [PATCH] sanitize ... |
515 |
error = user_path(pathname, &path); |
1da177e4c Linux-2.6.12-rc2 |
516 517 |
if (error) return error; |
2d8f30380 [PATCH] sanitize ... |
518 519 |
error = listxattr(path.dentry, list, size); path_put(&path); |
1da177e4c Linux-2.6.12-rc2 |
520 521 |
return error; } |
64fd1de3d [CVE-2009-0029] S... |
522 523 |
SYSCALL_DEFINE3(llistxattr, const char __user *, pathname, char __user *, list, size_t, size) |
1da177e4c Linux-2.6.12-rc2 |
524 |
{ |
2d8f30380 [PATCH] sanitize ... |
525 |
struct path path; |
1da177e4c Linux-2.6.12-rc2 |
526 |
ssize_t error; |
2d8f30380 [PATCH] sanitize ... |
527 |
error = user_lpath(pathname, &path); |
1da177e4c Linux-2.6.12-rc2 |
528 529 |
if (error) return error; |
2d8f30380 [PATCH] sanitize ... |
530 531 |
error = listxattr(path.dentry, list, size); path_put(&path); |
1da177e4c Linux-2.6.12-rc2 |
532 533 |
return error; } |
64fd1de3d [CVE-2009-0029] S... |
534 |
SYSCALL_DEFINE3(flistxattr, int, fd, char __user *, list, size_t, size) |
1da177e4c Linux-2.6.12-rc2 |
535 536 537 538 539 540 541 |
{ struct file *f; ssize_t error = -EBADF; f = fget(fd); if (!f) return error; |
5a190ae69 [PATCH] pass dent... |
542 |
audit_inode(NULL, f->f_path.dentry); |
0f7fc9e4d [PATCH] VFS: chan... |
543 |
error = listxattr(f->f_path.dentry, list, size); |
1da177e4c Linux-2.6.12-rc2 |
544 545 546 547 548 549 550 551 |
fput(f); return error; } /* * Extended attribute REMOVE operations */ static long |
8f0cfa52a xattr: add missin... |
552 |
removexattr(struct dentry *d, const char __user *name) |
1da177e4c Linux-2.6.12-rc2 |
553 554 555 556 557 558 559 560 561 |
{ int error; char kname[XATTR_NAME_MAX + 1]; error = strncpy_from_user(kname, name, sizeof(kname)); if (error == 0 || error == sizeof(kname)) error = -ERANGE; if (error < 0) return error; |
5be196e5f [PATCH] add vfs_*... |
562 |
return vfs_removexattr(d, kname); |
1da177e4c Linux-2.6.12-rc2 |
563 |
} |
64fd1de3d [CVE-2009-0029] S... |
564 565 |
SYSCALL_DEFINE2(removexattr, const char __user *, pathname, const char __user *, name) |
1da177e4c Linux-2.6.12-rc2 |
566 |
{ |
2d8f30380 [PATCH] sanitize ... |
567 |
struct path path; |
1da177e4c Linux-2.6.12-rc2 |
568 |
int error; |
2d8f30380 [PATCH] sanitize ... |
569 |
error = user_path(pathname, &path); |
1da177e4c Linux-2.6.12-rc2 |
570 571 |
if (error) return error; |
2d8f30380 [PATCH] sanitize ... |
572 |
error = mnt_want_write(path.mnt); |
18f335aff [PATCH] r/o bind ... |
573 |
if (!error) { |
2d8f30380 [PATCH] sanitize ... |
574 575 |
error = removexattr(path.dentry, name); mnt_drop_write(path.mnt); |
18f335aff [PATCH] r/o bind ... |
576 |
} |
2d8f30380 [PATCH] sanitize ... |
577 |
path_put(&path); |
1da177e4c Linux-2.6.12-rc2 |
578 579 |
return error; } |
6a6160a7b [CVE-2009-0029] S... |
580 581 |
SYSCALL_DEFINE2(lremovexattr, const char __user *, pathname, const char __user *, name) |
1da177e4c Linux-2.6.12-rc2 |
582 |
{ |
2d8f30380 [PATCH] sanitize ... |
583 |
struct path path; |
1da177e4c Linux-2.6.12-rc2 |
584 |
int error; |
2d8f30380 [PATCH] sanitize ... |
585 |
error = user_lpath(pathname, &path); |
1da177e4c Linux-2.6.12-rc2 |
586 587 |
if (error) return error; |
2d8f30380 [PATCH] sanitize ... |
588 |
error = mnt_want_write(path.mnt); |
18f335aff [PATCH] r/o bind ... |
589 |
if (!error) { |
2d8f30380 [PATCH] sanitize ... |
590 591 |
error = removexattr(path.dentry, name); mnt_drop_write(path.mnt); |
18f335aff [PATCH] r/o bind ... |
592 |
} |
2d8f30380 [PATCH] sanitize ... |
593 |
path_put(&path); |
1da177e4c Linux-2.6.12-rc2 |
594 595 |
return error; } |
6a6160a7b [CVE-2009-0029] S... |
596 |
SYSCALL_DEFINE2(fremovexattr, int, fd, const char __user *, name) |
1da177e4c Linux-2.6.12-rc2 |
597 598 |
{ struct file *f; |
73241ccca [PATCH] Collect m... |
599 |
struct dentry *dentry; |
1da177e4c Linux-2.6.12-rc2 |
600 601 602 603 604 |
int error = -EBADF; f = fget(fd); if (!f) return error; |
0f7fc9e4d [PATCH] VFS: chan... |
605 |
dentry = f->f_path.dentry; |
5a190ae69 [PATCH] pass dent... |
606 |
audit_inode(NULL, dentry); |
96029c4e0 fs: introduce mnt... |
607 |
error = mnt_want_write_file(f); |
18f335aff [PATCH] r/o bind ... |
608 609 |
if (!error) { error = removexattr(dentry, name); |
2a79f17e4 vfs: mnt_drop_wri... |
610 |
mnt_drop_write_file(f); |
18f335aff [PATCH] r/o bind ... |
611 |
} |
1da177e4c Linux-2.6.12-rc2 |
612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 |
fput(f); return error; } static const char * strcmp_prefix(const char *a, const char *a_prefix) { while (*a_prefix && *a == *a_prefix) { a++; a_prefix++; } return *a_prefix ? NULL : a; } /* * In order to implement different sets of xattr operations for each xattr * prefix with the generic xattr API, a filesystem should create a * null-terminated array of struct xattr_handler (one for each prefix) and * hang a pointer to it off of the s_xattr field of the superblock. * * The generic_fooxattr() functions will use this list to dispatch xattr * operations to the correct xattr_handler. */ #define for_each_xattr_handler(handlers, handler) \ for ((handler) = *(handlers)++; \ (handler) != NULL; \ (handler) = *(handlers)++) /* * Find the xattr_handler with the matching prefix. */ |
bb4354538 fs: xattr_handler... |
644 645 |
static const struct xattr_handler * xattr_resolve_name(const struct xattr_handler **handlers, const char **name) |
1da177e4c Linux-2.6.12-rc2 |
646 |
{ |
bb4354538 fs: xattr_handler... |
647 |
const struct xattr_handler *handler; |
1da177e4c Linux-2.6.12-rc2 |
648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 |
if (!*name) return NULL; for_each_xattr_handler(handlers, handler) { const char *n = strcmp_prefix(*name, handler->prefix); if (n) { *name = n; break; } } return handler; } /* * Find the handler for the prefix and dispatch its get() operation. */ ssize_t generic_getxattr(struct dentry *dentry, const char *name, void *buffer, size_t size) { |
bb4354538 fs: xattr_handler... |
668 |
const struct xattr_handler *handler; |
1da177e4c Linux-2.6.12-rc2 |
669 |
|
431547b3c sanitize xattr ha... |
670 |
handler = xattr_resolve_name(dentry->d_sb->s_xattr, &name); |
1da177e4c Linux-2.6.12-rc2 |
671 672 |
if (!handler) return -EOPNOTSUPP; |
431547b3c sanitize xattr ha... |
673 |
return handler->get(dentry, name, buffer, size, handler->flags); |
1da177e4c Linux-2.6.12-rc2 |
674 675 676 677 678 679 680 681 682 |
} /* * Combine the results of the list() operation from every xattr_handler in the * list. */ ssize_t generic_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size) { |
bb4354538 fs: xattr_handler... |
683 |
const struct xattr_handler *handler, **handlers = dentry->d_sb->s_xattr; |
1da177e4c Linux-2.6.12-rc2 |
684 685 686 |
unsigned int size = 0; if (!buffer) { |
431547b3c sanitize xattr ha... |
687 688 689 690 |
for_each_xattr_handler(handlers, handler) { size += handler->list(dentry, NULL, 0, NULL, 0, handler->flags); } |
1da177e4c Linux-2.6.12-rc2 |
691 692 693 694 |
} else { char *buf = buffer; for_each_xattr_handler(handlers, handler) { |
431547b3c sanitize xattr ha... |
695 696 |
size = handler->list(dentry, buf, buffer_size, NULL, 0, handler->flags); |
1da177e4c Linux-2.6.12-rc2 |
697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 |
if (size > buffer_size) return -ERANGE; buf += size; buffer_size -= size; } size = buf - buffer; } return size; } /* * Find the handler for the prefix and dispatch its set() operation. */ int generic_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags) { |
bb4354538 fs: xattr_handler... |
713 |
const struct xattr_handler *handler; |
1da177e4c Linux-2.6.12-rc2 |
714 715 716 |
if (size == 0) value = ""; /* empty EA, do not remove */ |
431547b3c sanitize xattr ha... |
717 |
handler = xattr_resolve_name(dentry->d_sb->s_xattr, &name); |
1da177e4c Linux-2.6.12-rc2 |
718 719 |
if (!handler) return -EOPNOTSUPP; |
df7e13038 vfs: Pass setxatt... |
720 |
return handler->set(dentry, name, value, size, flags, handler->flags); |
1da177e4c Linux-2.6.12-rc2 |
721 722 723 724 725 726 727 728 729 |
} /* * Find the handler for the prefix and dispatch its set() operation to remove * any associated extended attribute. */ int generic_removexattr(struct dentry *dentry, const char *name) { |
bb4354538 fs: xattr_handler... |
730 |
const struct xattr_handler *handler; |
1da177e4c Linux-2.6.12-rc2 |
731 |
|
431547b3c sanitize xattr ha... |
732 |
handler = xattr_resolve_name(dentry->d_sb->s_xattr, &name); |
1da177e4c Linux-2.6.12-rc2 |
733 734 |
if (!handler) return -EOPNOTSUPP; |
431547b3c sanitize xattr ha... |
735 736 |
return handler->set(dentry, name, NULL, 0, XATTR_REPLACE, handler->flags); |
1da177e4c Linux-2.6.12-rc2 |
737 738 739 740 741 742 |
} EXPORT_SYMBOL(generic_getxattr); EXPORT_SYMBOL(generic_listxattr); EXPORT_SYMBOL(generic_setxattr); EXPORT_SYMBOL(generic_removexattr); |