mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 10:46:40 +07:00
e2950b178e
Wrap access to task credentials so that they can be separated more easily from the task_struct during the introduction of COW creds. Change most current->(|e|s|fs)[ug]id to current_(|e|s|fs)[ug]id(). Change some task->e?[ug]id to task_e?[ug]id(). In some places it makes more sense to use RCU directly rather than a convenient wrapper; these will be addressed by later patches. Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: James Morris <jmorris@namei.org> Acked-by: Serge Hallyn <serue@us.ibm.com> Cc: Steven French <sfrench@us.ibm.com> Signed-off-by: James Morris <jmorris@namei.org>
836 lines
20 KiB
C
836 lines
20 KiB
C
/*
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* inode.c
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*
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* Copyright (C) 1995, 1996 by Paal-Kr. Engstad and Volker Lendecke
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* Copyright (C) 1997 by Volker Lendecke
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*
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* Please add a note about your changes to smbfs in the ChangeLog file.
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*/
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#include <linux/module.h>
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#include <linux/time.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/string.h>
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#include <linux/stat.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/file.h>
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#include <linux/dcache.h>
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#include <linux/smp_lock.h>
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#include <linux/nls.h>
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#include <linux/seq_file.h>
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#include <linux/mount.h>
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#include <linux/net.h>
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#include <linux/vfs.h>
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#include <linux/highuid.h>
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#include <linux/sched.h>
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#include <linux/smb_fs.h>
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#include <linux/smbno.h>
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#include <linux/smb_mount.h>
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#include <asm/system.h>
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#include <asm/uaccess.h>
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#include "smb_debug.h"
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#include "getopt.h"
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#include "proto.h"
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/* Always pick a default string */
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#ifdef CONFIG_SMB_NLS_REMOTE
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#define SMB_NLS_REMOTE CONFIG_SMB_NLS_REMOTE
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#else
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#define SMB_NLS_REMOTE ""
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#endif
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#define SMB_TTL_DEFAULT 1000
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static void smb_delete_inode(struct inode *);
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static void smb_put_super(struct super_block *);
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static int smb_statfs(struct dentry *, struct kstatfs *);
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static int smb_show_options(struct seq_file *, struct vfsmount *);
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static struct kmem_cache *smb_inode_cachep;
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static struct inode *smb_alloc_inode(struct super_block *sb)
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{
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struct smb_inode_info *ei;
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ei = (struct smb_inode_info *)kmem_cache_alloc(smb_inode_cachep, GFP_KERNEL);
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if (!ei)
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return NULL;
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return &ei->vfs_inode;
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}
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static void smb_destroy_inode(struct inode *inode)
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{
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kmem_cache_free(smb_inode_cachep, SMB_I(inode));
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}
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static void init_once(void *foo)
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{
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struct smb_inode_info *ei = (struct smb_inode_info *) foo;
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inode_init_once(&ei->vfs_inode);
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}
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static int init_inodecache(void)
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{
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smb_inode_cachep = kmem_cache_create("smb_inode_cache",
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sizeof(struct smb_inode_info),
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0, (SLAB_RECLAIM_ACCOUNT|
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SLAB_MEM_SPREAD),
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init_once);
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if (smb_inode_cachep == NULL)
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return -ENOMEM;
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return 0;
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}
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static void destroy_inodecache(void)
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{
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kmem_cache_destroy(smb_inode_cachep);
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}
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static int smb_remount(struct super_block *sb, int *flags, char *data)
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{
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*flags |= MS_NODIRATIME;
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return 0;
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}
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static const struct super_operations smb_sops =
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{
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.alloc_inode = smb_alloc_inode,
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.destroy_inode = smb_destroy_inode,
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.drop_inode = generic_delete_inode,
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.delete_inode = smb_delete_inode,
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.put_super = smb_put_super,
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.statfs = smb_statfs,
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.show_options = smb_show_options,
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.remount_fs = smb_remount,
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};
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/* We are always generating a new inode here */
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struct inode *
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smb_iget(struct super_block *sb, struct smb_fattr *fattr)
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{
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struct smb_sb_info *server = SMB_SB(sb);
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struct inode *result;
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DEBUG1("smb_iget: %p\n", fattr);
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result = new_inode(sb);
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if (!result)
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return result;
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result->i_ino = fattr->f_ino;
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SMB_I(result)->open = 0;
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SMB_I(result)->fileid = 0;
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SMB_I(result)->access = 0;
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SMB_I(result)->flags = 0;
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SMB_I(result)->closed = 0;
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SMB_I(result)->openers = 0;
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smb_set_inode_attr(result, fattr);
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if (S_ISREG(result->i_mode)) {
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result->i_op = &smb_file_inode_operations;
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result->i_fop = &smb_file_operations;
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result->i_data.a_ops = &smb_file_aops;
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} else if (S_ISDIR(result->i_mode)) {
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if (server->opt.capabilities & SMB_CAP_UNIX)
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result->i_op = &smb_dir_inode_operations_unix;
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else
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result->i_op = &smb_dir_inode_operations;
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result->i_fop = &smb_dir_operations;
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} else if (S_ISLNK(result->i_mode)) {
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result->i_op = &smb_link_inode_operations;
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} else {
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init_special_inode(result, result->i_mode, fattr->f_rdev);
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}
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insert_inode_hash(result);
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return result;
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}
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/*
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* Copy the inode data to a smb_fattr structure.
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*/
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void
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smb_get_inode_attr(struct inode *inode, struct smb_fattr *fattr)
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{
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memset(fattr, 0, sizeof(struct smb_fattr));
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fattr->f_mode = inode->i_mode;
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fattr->f_nlink = inode->i_nlink;
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fattr->f_ino = inode->i_ino;
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fattr->f_uid = inode->i_uid;
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fattr->f_gid = inode->i_gid;
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fattr->f_size = inode->i_size;
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fattr->f_mtime = inode->i_mtime;
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fattr->f_ctime = inode->i_ctime;
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fattr->f_atime = inode->i_atime;
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fattr->f_blocks = inode->i_blocks;
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fattr->attr = SMB_I(inode)->attr;
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/*
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* Keep the attributes in sync with the inode permissions.
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*/
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if (fattr->f_mode & S_IWUSR)
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fattr->attr &= ~aRONLY;
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else
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fattr->attr |= aRONLY;
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}
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/*
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* Update the inode, possibly causing it to invalidate its pages if mtime/size
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* is different from last time.
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*/
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void
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smb_set_inode_attr(struct inode *inode, struct smb_fattr *fattr)
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{
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struct smb_inode_info *ei = SMB_I(inode);
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/*
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* A size change should have a different mtime, or same mtime
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* but different size.
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*/
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time_t last_time = inode->i_mtime.tv_sec;
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loff_t last_sz = inode->i_size;
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inode->i_mode = fattr->f_mode;
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inode->i_nlink = fattr->f_nlink;
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inode->i_uid = fattr->f_uid;
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inode->i_gid = fattr->f_gid;
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inode->i_ctime = fattr->f_ctime;
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inode->i_blocks = fattr->f_blocks;
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inode->i_size = fattr->f_size;
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inode->i_mtime = fattr->f_mtime;
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inode->i_atime = fattr->f_atime;
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ei->attr = fattr->attr;
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/*
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* Update the "last time refreshed" field for revalidation.
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*/
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ei->oldmtime = jiffies;
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if (inode->i_mtime.tv_sec != last_time || inode->i_size != last_sz) {
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VERBOSE("%ld changed, old=%ld, new=%ld, oz=%ld, nz=%ld\n",
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inode->i_ino,
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(long) last_time, (long) inode->i_mtime.tv_sec,
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(long) last_sz, (long) inode->i_size);
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if (!S_ISDIR(inode->i_mode))
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invalidate_remote_inode(inode);
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}
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}
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/*
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* This is called if the connection has gone bad ...
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* try to kill off all the current inodes.
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*/
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void
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smb_invalidate_inodes(struct smb_sb_info *server)
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{
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VERBOSE("\n");
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shrink_dcache_sb(SB_of(server));
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invalidate_inodes(SB_of(server));
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}
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/*
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* This is called to update the inode attributes after
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* we've made changes to a file or directory.
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*/
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static int
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smb_refresh_inode(struct dentry *dentry)
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{
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struct inode *inode = dentry->d_inode;
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int error;
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struct smb_fattr fattr;
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error = smb_proc_getattr(dentry, &fattr);
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if (!error) {
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smb_renew_times(dentry);
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/*
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* Check whether the type part of the mode changed,
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* and don't update the attributes if it did.
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*
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* And don't dick with the root inode
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*/
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if (inode->i_ino == 2)
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return error;
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if (S_ISLNK(inode->i_mode))
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return error; /* VFS will deal with it */
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if ((inode->i_mode & S_IFMT) == (fattr.f_mode & S_IFMT)) {
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smb_set_inode_attr(inode, &fattr);
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} else {
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/*
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* Big trouble! The inode has become a new object,
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* so any operations attempted on it are invalid.
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*
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* To limit damage, mark the inode as bad so that
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* subsequent lookup validations will fail.
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*/
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PARANOIA("%s/%s changed mode, %07o to %07o\n",
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DENTRY_PATH(dentry),
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inode->i_mode, fattr.f_mode);
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fattr.f_mode = inode->i_mode; /* save mode */
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make_bad_inode(inode);
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inode->i_mode = fattr.f_mode; /* restore mode */
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/*
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* No need to worry about unhashing the dentry: the
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* lookup validation will see that the inode is bad.
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* But we do want to invalidate the caches ...
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*/
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if (!S_ISDIR(inode->i_mode))
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invalidate_remote_inode(inode);
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else
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smb_invalid_dir_cache(inode);
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error = -EIO;
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}
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}
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return error;
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}
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/*
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* This is called when we want to check whether the inode
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* has changed on the server. If it has changed, we must
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* invalidate our local caches.
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*/
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int
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smb_revalidate_inode(struct dentry *dentry)
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{
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struct smb_sb_info *s = server_from_dentry(dentry);
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struct inode *inode = dentry->d_inode;
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int error = 0;
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DEBUG1("smb_revalidate_inode\n");
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lock_kernel();
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/*
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* Check whether we've recently refreshed the inode.
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*/
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if (time_before(jiffies, SMB_I(inode)->oldmtime + SMB_MAX_AGE(s))) {
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VERBOSE("up-to-date, ino=%ld, jiffies=%lu, oldtime=%lu\n",
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inode->i_ino, jiffies, SMB_I(inode)->oldmtime);
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goto out;
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}
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error = smb_refresh_inode(dentry);
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out:
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unlock_kernel();
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return error;
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}
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/*
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* This routine is called when i_nlink == 0 and i_count goes to 0.
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* All blocking cleanup operations need to go here to avoid races.
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*/
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static void
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smb_delete_inode(struct inode *ino)
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{
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DEBUG1("ino=%ld\n", ino->i_ino);
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truncate_inode_pages(&ino->i_data, 0);
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lock_kernel();
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if (smb_close(ino))
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PARANOIA("could not close inode %ld\n", ino->i_ino);
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unlock_kernel();
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clear_inode(ino);
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}
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static struct option opts[] = {
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{ "version", 0, 'v' },
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{ "win95", SMB_MOUNT_WIN95, 1 },
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{ "oldattr", SMB_MOUNT_OLDATTR, 1 },
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{ "dirattr", SMB_MOUNT_DIRATTR, 1 },
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{ "case", SMB_MOUNT_CASE, 1 },
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{ "uid", 0, 'u' },
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{ "gid", 0, 'g' },
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{ "file_mode", 0, 'f' },
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{ "dir_mode", 0, 'd' },
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{ "iocharset", 0, 'i' },
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{ "codepage", 0, 'c' },
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{ "ttl", 0, 't' },
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{ NULL, 0, 0}
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};
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static int
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parse_options(struct smb_mount_data_kernel *mnt, char *options)
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{
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int c;
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unsigned long flags;
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unsigned long value;
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char *optarg;
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char *optopt;
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flags = 0;
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while ( (c = smb_getopt("smbfs", &options, opts,
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&optopt, &optarg, &flags, &value)) > 0) {
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VERBOSE("'%s' -> '%s'\n", optopt, optarg ? optarg : "<none>");
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switch (c) {
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case 1:
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/* got a "flag" option */
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break;
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case 'v':
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if (value != SMB_MOUNT_VERSION) {
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printk ("smbfs: Bad mount version %ld, expected %d\n",
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value, SMB_MOUNT_VERSION);
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return 0;
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}
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mnt->version = value;
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break;
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case 'u':
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mnt->uid = value;
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flags |= SMB_MOUNT_UID;
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break;
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case 'g':
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mnt->gid = value;
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flags |= SMB_MOUNT_GID;
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break;
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case 'f':
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mnt->file_mode = (value & S_IRWXUGO) | S_IFREG;
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flags |= SMB_MOUNT_FMODE;
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break;
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case 'd':
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mnt->dir_mode = (value & S_IRWXUGO) | S_IFDIR;
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flags |= SMB_MOUNT_DMODE;
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break;
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case 'i':
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strlcpy(mnt->codepage.local_name, optarg,
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SMB_NLS_MAXNAMELEN);
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break;
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case 'c':
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strlcpy(mnt->codepage.remote_name, optarg,
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SMB_NLS_MAXNAMELEN);
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break;
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case 't':
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mnt->ttl = value;
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break;
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default:
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printk ("smbfs: Unrecognized mount option %s\n",
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optopt);
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return -1;
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}
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}
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mnt->flags = flags;
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return c;
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}
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|
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/*
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* smb_show_options() is for displaying mount options in /proc/mounts.
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* It tries to avoid showing settings that were not changed from their
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* defaults.
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*/
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static int
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smb_show_options(struct seq_file *s, struct vfsmount *m)
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{
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struct smb_mount_data_kernel *mnt = SMB_SB(m->mnt_sb)->mnt;
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int i;
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for (i = 0; opts[i].name != NULL; i++)
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if (mnt->flags & opts[i].flag)
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seq_printf(s, ",%s", opts[i].name);
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|
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if (mnt->flags & SMB_MOUNT_UID)
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seq_printf(s, ",uid=%d", mnt->uid);
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if (mnt->flags & SMB_MOUNT_GID)
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seq_printf(s, ",gid=%d", mnt->gid);
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if (mnt->mounted_uid != 0)
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seq_printf(s, ",mounted_uid=%d", mnt->mounted_uid);
|
|
|
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/*
|
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* Defaults for file_mode and dir_mode are unknown to us; they
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* depend on the current umask of the user doing the mount.
|
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*/
|
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if (mnt->flags & SMB_MOUNT_FMODE)
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seq_printf(s, ",file_mode=%04o", mnt->file_mode & S_IRWXUGO);
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if (mnt->flags & SMB_MOUNT_DMODE)
|
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seq_printf(s, ",dir_mode=%04o", mnt->dir_mode & S_IRWXUGO);
|
|
|
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if (strcmp(mnt->codepage.local_name, CONFIG_NLS_DEFAULT))
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seq_printf(s, ",iocharset=%s", mnt->codepage.local_name);
|
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if (strcmp(mnt->codepage.remote_name, SMB_NLS_REMOTE))
|
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seq_printf(s, ",codepage=%s", mnt->codepage.remote_name);
|
|
|
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if (mnt->ttl != SMB_TTL_DEFAULT)
|
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seq_printf(s, ",ttl=%d", mnt->ttl);
|
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|
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return 0;
|
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}
|
|
|
|
static void
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smb_unload_nls(struct smb_sb_info *server)
|
|
{
|
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if (server->remote_nls) {
|
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unload_nls(server->remote_nls);
|
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server->remote_nls = NULL;
|
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}
|
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if (server->local_nls) {
|
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unload_nls(server->local_nls);
|
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server->local_nls = NULL;
|
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}
|
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}
|
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|
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static void
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smb_put_super(struct super_block *sb)
|
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{
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struct smb_sb_info *server = SMB_SB(sb);
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|
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smb_lock_server(server);
|
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server->state = CONN_INVALID;
|
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smbiod_unregister_server(server);
|
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|
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smb_close_socket(server);
|
|
|
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if (server->conn_pid)
|
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kill_pid(server->conn_pid, SIGTERM, 1);
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|
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kfree(server->ops);
|
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smb_unload_nls(server);
|
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sb->s_fs_info = NULL;
|
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smb_unlock_server(server);
|
|
put_pid(server->conn_pid);
|
|
kfree(server);
|
|
}
|
|
|
|
static int smb_fill_super(struct super_block *sb, void *raw_data, int silent)
|
|
{
|
|
struct smb_sb_info *server;
|
|
struct smb_mount_data_kernel *mnt;
|
|
struct smb_mount_data *oldmnt;
|
|
struct inode *root_inode;
|
|
struct smb_fattr root;
|
|
int ver;
|
|
void *mem;
|
|
static int warn_count;
|
|
|
|
if (warn_count < 5) {
|
|
warn_count++;
|
|
printk(KERN_EMERG "smbfs is deprecated and will be removed"
|
|
" from the 2.6.27 kernel. Please migrate to cifs\n");
|
|
}
|
|
|
|
if (!raw_data)
|
|
goto out_no_data;
|
|
|
|
oldmnt = (struct smb_mount_data *) raw_data;
|
|
ver = oldmnt->version;
|
|
if (ver != SMB_MOUNT_OLDVERSION && cpu_to_be32(ver) != SMB_MOUNT_ASCII)
|
|
goto out_wrong_data;
|
|
|
|
sb->s_flags |= MS_NODIRATIME;
|
|
sb->s_blocksize = 1024; /* Eh... Is this correct? */
|
|
sb->s_blocksize_bits = 10;
|
|
sb->s_magic = SMB_SUPER_MAGIC;
|
|
sb->s_op = &smb_sops;
|
|
sb->s_time_gran = 100;
|
|
|
|
server = kzalloc(sizeof(struct smb_sb_info), GFP_KERNEL);
|
|
if (!server)
|
|
goto out_no_server;
|
|
sb->s_fs_info = server;
|
|
|
|
server->super_block = sb;
|
|
server->mnt = NULL;
|
|
server->sock_file = NULL;
|
|
init_waitqueue_head(&server->conn_wq);
|
|
init_MUTEX(&server->sem);
|
|
INIT_LIST_HEAD(&server->entry);
|
|
INIT_LIST_HEAD(&server->xmitq);
|
|
INIT_LIST_HEAD(&server->recvq);
|
|
server->conn_error = 0;
|
|
server->conn_pid = NULL;
|
|
server->state = CONN_INVALID; /* no connection yet */
|
|
server->generation = 0;
|
|
|
|
/* Allocate the global temp buffer and some superblock helper structs */
|
|
/* FIXME: move these to the smb_sb_info struct */
|
|
VERBOSE("alloc chunk = %lu\n", sizeof(struct smb_ops) +
|
|
sizeof(struct smb_mount_data_kernel));
|
|
mem = kmalloc(sizeof(struct smb_ops) +
|
|
sizeof(struct smb_mount_data_kernel), GFP_KERNEL);
|
|
if (!mem)
|
|
goto out_no_mem;
|
|
|
|
server->ops = mem;
|
|
smb_install_null_ops(server->ops);
|
|
server->mnt = mem + sizeof(struct smb_ops);
|
|
|
|
/* Setup NLS stuff */
|
|
server->remote_nls = NULL;
|
|
server->local_nls = NULL;
|
|
|
|
mnt = server->mnt;
|
|
|
|
memset(mnt, 0, sizeof(struct smb_mount_data_kernel));
|
|
strlcpy(mnt->codepage.local_name, CONFIG_NLS_DEFAULT,
|
|
SMB_NLS_MAXNAMELEN);
|
|
strlcpy(mnt->codepage.remote_name, SMB_NLS_REMOTE,
|
|
SMB_NLS_MAXNAMELEN);
|
|
|
|
mnt->ttl = SMB_TTL_DEFAULT;
|
|
if (ver == SMB_MOUNT_OLDVERSION) {
|
|
mnt->version = oldmnt->version;
|
|
|
|
SET_UID(mnt->uid, oldmnt->uid);
|
|
SET_GID(mnt->gid, oldmnt->gid);
|
|
|
|
mnt->file_mode = (oldmnt->file_mode & S_IRWXUGO) | S_IFREG;
|
|
mnt->dir_mode = (oldmnt->dir_mode & S_IRWXUGO) | S_IFDIR;
|
|
|
|
mnt->flags = (oldmnt->file_mode >> 9) | SMB_MOUNT_UID |
|
|
SMB_MOUNT_GID | SMB_MOUNT_FMODE | SMB_MOUNT_DMODE;
|
|
} else {
|
|
mnt->file_mode = S_IRWXU | S_IRGRP | S_IXGRP |
|
|
S_IROTH | S_IXOTH | S_IFREG;
|
|
mnt->dir_mode = S_IRWXU | S_IRGRP | S_IXGRP |
|
|
S_IROTH | S_IXOTH | S_IFDIR;
|
|
if (parse_options(mnt, raw_data))
|
|
goto out_bad_option;
|
|
}
|
|
mnt->mounted_uid = current_uid();
|
|
smb_setcodepage(server, &mnt->codepage);
|
|
|
|
/*
|
|
* Display the enabled options
|
|
* Note: smb_proc_getattr uses these in 2.4 (but was changed in 2.2)
|
|
*/
|
|
if (mnt->flags & SMB_MOUNT_OLDATTR)
|
|
printk("SMBFS: Using core getattr (Win 95 speedup)\n");
|
|
else if (mnt->flags & SMB_MOUNT_DIRATTR)
|
|
printk("SMBFS: Using dir ff getattr\n");
|
|
|
|
if (smbiod_register_server(server) < 0) {
|
|
printk(KERN_ERR "smbfs: failed to start smbiod\n");
|
|
goto out_no_smbiod;
|
|
}
|
|
|
|
/*
|
|
* Keep the super block locked while we get the root inode.
|
|
*/
|
|
smb_init_root_dirent(server, &root, sb);
|
|
root_inode = smb_iget(sb, &root);
|
|
if (!root_inode)
|
|
goto out_no_root;
|
|
|
|
sb->s_root = d_alloc_root(root_inode);
|
|
if (!sb->s_root)
|
|
goto out_no_root;
|
|
|
|
smb_new_dentry(sb->s_root);
|
|
|
|
return 0;
|
|
|
|
out_no_root:
|
|
iput(root_inode);
|
|
out_no_smbiod:
|
|
smb_unload_nls(server);
|
|
out_bad_option:
|
|
kfree(mem);
|
|
out_no_mem:
|
|
if (!server->mnt)
|
|
printk(KERN_ERR "smb_fill_super: allocation failure\n");
|
|
sb->s_fs_info = NULL;
|
|
kfree(server);
|
|
goto out_fail;
|
|
out_wrong_data:
|
|
printk(KERN_ERR "smbfs: mount_data version %d is not supported\n", ver);
|
|
goto out_fail;
|
|
out_no_data:
|
|
printk(KERN_ERR "smb_fill_super: missing data argument\n");
|
|
out_fail:
|
|
return -EINVAL;
|
|
out_no_server:
|
|
printk(KERN_ERR "smb_fill_super: cannot allocate struct smb_sb_info\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static int
|
|
smb_statfs(struct dentry *dentry, struct kstatfs *buf)
|
|
{
|
|
int result;
|
|
|
|
lock_kernel();
|
|
|
|
result = smb_proc_dskattr(dentry, buf);
|
|
|
|
unlock_kernel();
|
|
|
|
buf->f_type = SMB_SUPER_MAGIC;
|
|
buf->f_namelen = SMB_MAXPATHLEN;
|
|
return result;
|
|
}
|
|
|
|
int smb_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
|
|
{
|
|
int err = smb_revalidate_inode(dentry);
|
|
if (!err)
|
|
generic_fillattr(dentry->d_inode, stat);
|
|
return err;
|
|
}
|
|
|
|
int
|
|
smb_notify_change(struct dentry *dentry, struct iattr *attr)
|
|
{
|
|
struct inode *inode = dentry->d_inode;
|
|
struct smb_sb_info *server = server_from_dentry(dentry);
|
|
unsigned int mask = (S_IFREG | S_IFDIR | S_IRWXUGO);
|
|
int error, changed, refresh = 0;
|
|
struct smb_fattr fattr;
|
|
|
|
lock_kernel();
|
|
|
|
error = smb_revalidate_inode(dentry);
|
|
if (error)
|
|
goto out;
|
|
|
|
if ((error = inode_change_ok(inode, attr)) < 0)
|
|
goto out;
|
|
|
|
error = -EPERM;
|
|
if ((attr->ia_valid & ATTR_UID) && (attr->ia_uid != server->mnt->uid))
|
|
goto out;
|
|
|
|
if ((attr->ia_valid & ATTR_GID) && (attr->ia_uid != server->mnt->gid))
|
|
goto out;
|
|
|
|
if ((attr->ia_valid & ATTR_MODE) && (attr->ia_mode & ~mask))
|
|
goto out;
|
|
|
|
if ((attr->ia_valid & ATTR_SIZE) != 0) {
|
|
VERBOSE("changing %s/%s, old size=%ld, new size=%ld\n",
|
|
DENTRY_PATH(dentry),
|
|
(long) inode->i_size, (long) attr->ia_size);
|
|
|
|
filemap_write_and_wait(inode->i_mapping);
|
|
|
|
error = smb_open(dentry, O_WRONLY);
|
|
if (error)
|
|
goto out;
|
|
error = server->ops->truncate(inode, attr->ia_size);
|
|
if (error)
|
|
goto out;
|
|
error = vmtruncate(inode, attr->ia_size);
|
|
if (error)
|
|
goto out;
|
|
refresh = 1;
|
|
}
|
|
|
|
if (server->opt.capabilities & SMB_CAP_UNIX) {
|
|
/* For now we don't want to set the size with setattr_unix */
|
|
attr->ia_valid &= ~ATTR_SIZE;
|
|
/* FIXME: only call if we actually want to set something? */
|
|
error = smb_proc_setattr_unix(dentry, attr, 0, 0);
|
|
if (!error)
|
|
refresh = 1;
|
|
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Initialize the fattr and check for changed fields.
|
|
* Note: CTIME under SMB is creation time rather than
|
|
* change time, so we don't attempt to change it.
|
|
*/
|
|
smb_get_inode_attr(inode, &fattr);
|
|
|
|
changed = 0;
|
|
if ((attr->ia_valid & ATTR_MTIME) != 0) {
|
|
fattr.f_mtime = attr->ia_mtime;
|
|
changed = 1;
|
|
}
|
|
if ((attr->ia_valid & ATTR_ATIME) != 0) {
|
|
fattr.f_atime = attr->ia_atime;
|
|
/* Earlier protocols don't have an access time */
|
|
if (server->opt.protocol >= SMB_PROTOCOL_LANMAN2)
|
|
changed = 1;
|
|
}
|
|
if (changed) {
|
|
error = smb_proc_settime(dentry, &fattr);
|
|
if (error)
|
|
goto out;
|
|
refresh = 1;
|
|
}
|
|
|
|
/*
|
|
* Check for mode changes ... we're extremely limited in
|
|
* what can be set for SMB servers: just the read-only bit.
|
|
*/
|
|
if ((attr->ia_valid & ATTR_MODE) != 0) {
|
|
VERBOSE("%s/%s mode change, old=%x, new=%x\n",
|
|
DENTRY_PATH(dentry), fattr.f_mode, attr->ia_mode);
|
|
changed = 0;
|
|
if (attr->ia_mode & S_IWUSR) {
|
|
if (fattr.attr & aRONLY) {
|
|
fattr.attr &= ~aRONLY;
|
|
changed = 1;
|
|
}
|
|
} else {
|
|
if (!(fattr.attr & aRONLY)) {
|
|
fattr.attr |= aRONLY;
|
|
changed = 1;
|
|
}
|
|
}
|
|
if (changed) {
|
|
error = smb_proc_setattr(dentry, &fattr);
|
|
if (error)
|
|
goto out;
|
|
refresh = 1;
|
|
}
|
|
}
|
|
error = 0;
|
|
|
|
out:
|
|
if (refresh)
|
|
smb_refresh_inode(dentry);
|
|
unlock_kernel();
|
|
return error;
|
|
}
|
|
|
|
static int smb_get_sb(struct file_system_type *fs_type,
|
|
int flags, const char *dev_name, void *data, struct vfsmount *mnt)
|
|
{
|
|
return get_sb_nodev(fs_type, flags, data, smb_fill_super, mnt);
|
|
}
|
|
|
|
static struct file_system_type smb_fs_type = {
|
|
.owner = THIS_MODULE,
|
|
.name = "smbfs",
|
|
.get_sb = smb_get_sb,
|
|
.kill_sb = kill_anon_super,
|
|
.fs_flags = FS_BINARY_MOUNTDATA,
|
|
};
|
|
|
|
static int __init init_smb_fs(void)
|
|
{
|
|
int err;
|
|
DEBUG1("registering ...\n");
|
|
|
|
err = init_inodecache();
|
|
if (err)
|
|
goto out_inode;
|
|
err = smb_init_request_cache();
|
|
if (err)
|
|
goto out_request;
|
|
err = register_filesystem(&smb_fs_type);
|
|
if (err)
|
|
goto out;
|
|
return 0;
|
|
out:
|
|
smb_destroy_request_cache();
|
|
out_request:
|
|
destroy_inodecache();
|
|
out_inode:
|
|
return err;
|
|
}
|
|
|
|
static void __exit exit_smb_fs(void)
|
|
{
|
|
DEBUG1("unregistering ...\n");
|
|
unregister_filesystem(&smb_fs_type);
|
|
smb_destroy_request_cache();
|
|
destroy_inodecache();
|
|
}
|
|
|
|
module_init(init_smb_fs)
|
|
module_exit(exit_smb_fs)
|
|
MODULE_LICENSE("GPL");
|