/* * mark the data attached to an inode as obsolete due to a write on the server * - might also want to ditch all the outstanding writes and dirty pages */ void afs_zap_data(struct afs_vnode *vnode) { _enter("{%x:%u}", vnode->fid.vid, vnode->fid.vnode); /* nuke all the non-dirty pages that aren't locked, mapped or being * written back in a regular file and completely discard the pages in a * directory or symlink */ if (S_ISREG(vnode->vfs_inode.i_mode)) invalidate_remote_inode(&vnode->vfs_inode); else invalidate_inode_pages2(vnode->vfs_inode.i_mapping); }
/* * This is called to update the inode attributes after * we've made changes to a file or directory. */ static int smb_refresh_inode(struct dentry *dentry) { struct inode *inode = dentry->d_inode; int error; struct smb_fattr fattr; error = smb_proc_getattr(dentry, &fattr); if (!error) { smb_renew_times(dentry); /* * Check whether the type part of the mode changed, * and don't update the attributes if it did. * * And don't dick with the root inode */ if (inode->i_ino == 2) return error; if (S_ISLNK(inode->i_mode)) return error; /* VFS will deal with it */ if ((inode->i_mode & S_IFMT) == (fattr.f_mode & S_IFMT)) { smb_set_inode_attr(inode, &fattr); } else { /* * Big trouble! The inode has become a new object, * so any operations attempted on it are invalid. * * To limit damage, mark the inode as bad so that * subsequent lookup validations will fail. */ PARANOIA("%s/%s changed mode, %07o to %07o\n", DENTRY_PATH(dentry), inode->i_mode, fattr.f_mode); fattr.f_mode = inode->i_mode; /* save mode */ make_bad_inode(inode); inode->i_mode = fattr.f_mode; /* restore mode */ /* * No need to worry about unhashing the dentry: the * lookup validation will see that the inode is bad. * But we do want to invalidate the caches ... */ if (!S_ISDIR(inode->i_mode)) invalidate_remote_inode(inode); else smb_invalid_dir_cache(inode); error = -EIO; } } return error; }
/* * Update the inode, possibly causing it to invalidate its pages if mtime/size * is different from last time. */ void smb_set_inode_attr(struct inode *inode, struct smb_fattr *fattr) { struct smb_inode_info *ei = SMB_I(inode); /* * A size change should have a different mtime, or same mtime * but different size. */ time_t last_time = inode->i_mtime.tv_sec; loff_t last_sz = inode->i_size; inode->i_mode = fattr->f_mode; inode->i_nlink = fattr->f_nlink; inode->i_uid = fattr->f_uid; inode->i_gid = fattr->f_gid; inode->i_ctime = fattr->f_ctime; inode->i_blksize= fattr->f_blksize; inode->i_blocks = fattr->f_blocks; inode->i_size = fattr->f_size; inode->i_mtime = fattr->f_mtime; inode->i_atime = fattr->f_atime; ei->attr = fattr->attr; /* * Update the "last time refreshed" field for revalidation. */ ei->oldmtime = jiffies; if (inode->i_mtime.tv_sec != last_time || inode->i_size != last_sz) { VERBOSE("%ld changed, old=%ld, new=%ld, oz=%ld, nz=%ld\n", inode->i_ino, (long) last_time, (long) inode->i_mtime, (long) last_sz, (long) inode->i_size); if (!S_ISDIR(inode->i_mode)) invalidate_remote_inode(inode); } }
static void posix_fill_in_inode(struct inode *tmp_inode, FILE_UNIX_BASIC_INFO *pData, int isNewInode) { struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); loff_t local_size; struct timespec local_mtime; cifsInfo->time = jiffies; atomic_inc(&cifsInfo->inUse); /* save mtime and size */ local_mtime = tmp_inode->i_mtime; local_size = tmp_inode->i_size; cifs_unix_info_to_inode(tmp_inode, pData, 0); cifs_set_ops(tmp_inode, false); if (!S_ISREG(tmp_inode->i_mode)) return; /* * No sense invalidating pages for new inode * since we we have not started caching * readahead file data yet. */ if (isNewInode) return; if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && (local_size == tmp_inode->i_size)) { cFYI(1, ("inode exists but unchanged")); } else { /* file may have changed on server */ cFYI(1, ("invalidate inode, readdir detected change")); invalidate_remote_inode(tmp_inode); } }
static void unix_fill_in_inode(struct inode *tmp_inode, FILE_UNIX_INFO *pfindData, unsigned int *pobject_type, int isNewInode) { loff_t local_size; struct timespec local_mtime; struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); __u32 type = le32_to_cpu(pfindData->Type); __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes); __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile); cifsInfo->time = jiffies; atomic_inc(&cifsInfo->inUse); /* save mtime and size */ local_mtime = tmp_inode->i_mtime; local_size = tmp_inode->i_size; tmp_inode->i_atime = cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); tmp_inode->i_mtime = cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime)); tmp_inode->i_ctime = cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange)); tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions); /* since we set the inode type below we need to mask off type to avoid strange results if bits above were corrupt */ tmp_inode->i_mode &= ~S_IFMT; if (type == UNIX_FILE) { *pobject_type = DT_REG; tmp_inode->i_mode |= S_IFREG; } else if (type == UNIX_SYMLINK) { *pobject_type = DT_LNK; tmp_inode->i_mode |= S_IFLNK; } else if (type == UNIX_DIR) { *pobject_type = DT_DIR; tmp_inode->i_mode |= S_IFDIR; } else if (type == UNIX_CHARDEV) { *pobject_type = DT_CHR; tmp_inode->i_mode |= S_IFCHR; tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), le64_to_cpu(pfindData->DevMinor) & MINORMASK); } else if (type == UNIX_BLOCKDEV) { *pobject_type = DT_BLK; tmp_inode->i_mode |= S_IFBLK; tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), le64_to_cpu(pfindData->DevMinor) & MINORMASK); } else if (type == UNIX_FIFO) { *pobject_type = DT_FIFO; tmp_inode->i_mode |= S_IFIFO; } else if (type == UNIX_SOCKET) { *pobject_type = DT_SOCK; tmp_inode->i_mode |= S_IFSOCK; } else { /* safest to just call it a file */ *pobject_type = DT_REG; tmp_inode->i_mode |= S_IFREG; cFYI(1, ("unknown inode type %d", type)); } if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) tmp_inode->i_uid = cifs_sb->mnt_uid; else tmp_inode->i_uid = le64_to_cpu(pfindData->Uid); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) tmp_inode->i_gid = cifs_sb->mnt_gid; else tmp_inode->i_gid = le64_to_cpu(pfindData->Gid); tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks); spin_lock(&tmp_inode->i_lock); if (is_size_safe_to_change(cifsInfo, end_of_file)) { /* can not safely change the file size here if the client is writing to it due to potential races */ i_size_write(tmp_inode, end_of_file); /* 512 bytes (2**9) is the fake blocksize that must be used */ /* for this calculation, not the real blocksize */ tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; } spin_unlock(&tmp_inode->i_lock); if (S_ISREG(tmp_inode->i_mode)) { cFYI(1, ("File inode")); tmp_inode->i_op = &cifs_file_inode_ops; if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; else tmp_inode->i_fop = &cifs_file_direct_ops; } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) tmp_inode->i_fop = &cifs_file_nobrl_ops; else tmp_inode->i_fop = &cifs_file_ops; if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) && (cifs_sb->tcon->ses->server->maxBuf < PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; else tmp_inode->i_data.a_ops = &cifs_addr_ops; if (isNewInode) return; /* No sense invalidating pages for new inode since we have not started caching readahead file data for it yet */ if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && (local_size == tmp_inode->i_size)) { cFYI(1, ("inode exists but unchanged")); } else { /* file may have changed on server */ cFYI(1, ("invalidate inode, readdir detected change")); invalidate_remote_inode(tmp_inode); } } else if (S_ISDIR(tmp_inode->i_mode)) { cFYI(1, ("Directory inode")); tmp_inode->i_op = &cifs_dir_inode_ops; tmp_inode->i_fop = &cifs_dir_ops; } else if (S_ISLNK(tmp_inode->i_mode)) { cFYI(1, ("Symbolic Link inode")); tmp_inode->i_op = &cifs_symlink_inode_ops; /* tmp_inode->i_fop = *//* do not need to set to anything */ } else { cFYI(1, ("Special inode")); init_special_inode(tmp_inode, tmp_inode->i_mode, tmp_inode->i_rdev); } }
static void fill_in_inode(struct inode *tmp_inode, int new_buf_type, char *buf, unsigned int *pobject_type, int isNewInode) { loff_t local_size; struct timespec local_mtime; struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); __u32 attr; __u64 allocation_size; __u64 end_of_file; umode_t default_mode; /* save mtime and size */ local_mtime = tmp_inode->i_mtime; local_size = tmp_inode->i_size; if (new_buf_type) { FILE_DIRECTORY_INFO *pfindData = (FILE_DIRECTORY_INFO *)buf; attr = le32_to_cpu(pfindData->ExtFileAttributes); allocation_size = le64_to_cpu(pfindData->AllocationSize); end_of_file = le64_to_cpu(pfindData->EndOfFile); tmp_inode->i_atime = cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); tmp_inode->i_mtime = cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime)); tmp_inode->i_ctime = cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime)); } else { /* legacy, OS2 and DOS style */ /* struct timespec ts;*/ FIND_FILE_STANDARD_INFO *pfindData = (FIND_FILE_STANDARD_INFO *)buf; tmp_inode->i_mtime = cnvrtDosUnixTm( le16_to_cpu(pfindData->LastWriteDate), le16_to_cpu(pfindData->LastWriteTime)); tmp_inode->i_atime = cnvrtDosUnixTm( le16_to_cpu(pfindData->LastAccessDate), le16_to_cpu(pfindData->LastAccessTime)); tmp_inode->i_ctime = cnvrtDosUnixTm( le16_to_cpu(pfindData->LastWriteDate), le16_to_cpu(pfindData->LastWriteTime)); AdjustForTZ(cifs_sb->tcon, tmp_inode); attr = le16_to_cpu(pfindData->Attributes); allocation_size = le32_to_cpu(pfindData->AllocationSize); end_of_file = le32_to_cpu(pfindData->DataSize); } /* Linux can not store file creation time unfortunately so ignore it */ cifsInfo->cifsAttrs = attr; #ifdef CONFIG_CIFS_EXPERIMENTAL if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { /* get more accurate mode via ACL - so force inode refresh */ cifsInfo->time = 0; } else #endif /* CONFIG_CIFS_EXPERIMENTAL */ cifsInfo->time = jiffies; /* treat dos attribute of read-only as read-only mode bit e.g. 555? */ /* 2767 perms - indicate mandatory locking */ /* BB fill in uid and gid here? with help from winbind? or retrieve from NTFS stream extended attribute */ if (atomic_read(&cifsInfo->inUse) == 0) { tmp_inode->i_uid = cifs_sb->mnt_uid; tmp_inode->i_gid = cifs_sb->mnt_gid; } if (attr & ATTR_DIRECTORY) default_mode = cifs_sb->mnt_dir_mode; else default_mode = cifs_sb->mnt_file_mode; /* set initial permissions */ if ((atomic_read(&cifsInfo->inUse) == 0) || (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) tmp_inode->i_mode = default_mode; else { /* just reenable write bits if !ATTR_READONLY */ if ((tmp_inode->i_mode & S_IWUGO) == 0 && (attr & ATTR_READONLY) == 0) tmp_inode->i_mode |= (S_IWUGO & default_mode); tmp_inode->i_mode &= ~S_IFMT; } /* clear write bits if ATTR_READONLY is set */ if (attr & ATTR_READONLY) tmp_inode->i_mode &= ~S_IWUGO; /* set inode type */ if ((attr & ATTR_SYSTEM) && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) { if (end_of_file == 0) { tmp_inode->i_mode |= S_IFIFO; *pobject_type = DT_FIFO; } else { /* * trying to get the type can be slow, so just call * this a regular file for now, and mark for reval */ tmp_inode->i_mode |= S_IFREG; *pobject_type = DT_REG; cifsInfo->time = 0; } } else { if (attr & ATTR_DIRECTORY) { tmp_inode->i_mode |= S_IFDIR; *pobject_type = DT_DIR; } else { tmp_inode->i_mode |= S_IFREG; *pobject_type = DT_REG; } } /* can not fill in nlink here as in qpathinfo version and Unx search */ if (atomic_read(&cifsInfo->inUse) == 0) atomic_set(&cifsInfo->inUse, 1); spin_lock(&tmp_inode->i_lock); if (is_size_safe_to_change(cifsInfo, end_of_file)) { /* can not safely change the file size here if the client is writing to it due to potential races */ i_size_write(tmp_inode, end_of_file); /* 512 bytes (2**9) is the fake blocksize that must be used */ /* for this calculation, even though the reported blocksize is larger */ tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9; } spin_unlock(&tmp_inode->i_lock); if (allocation_size < end_of_file) cFYI(1, ("May be sparse file, allocation less than file size")); cFYI(1, ("File Size %ld and blocks %llu", (unsigned long)tmp_inode->i_size, (unsigned long long)tmp_inode->i_blocks)); if (S_ISREG(tmp_inode->i_mode)) { cFYI(1, ("File inode")); tmp_inode->i_op = &cifs_file_inode_ops; if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; else tmp_inode->i_fop = &cifs_file_direct_ops; } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) tmp_inode->i_fop = &cifs_file_nobrl_ops; else tmp_inode->i_fop = &cifs_file_ops; if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) && (cifs_sb->tcon->ses->server->maxBuf < PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; else tmp_inode->i_data.a_ops = &cifs_addr_ops; if (isNewInode) return; /* No sense invalidating pages for new inode since have not started caching readahead file data yet */ if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && (local_size == tmp_inode->i_size)) { cFYI(1, ("inode exists but unchanged")); } else { /* file may have changed on server */ cFYI(1, ("invalidate inode, readdir detected change")); invalidate_remote_inode(tmp_inode); } } else if (S_ISDIR(tmp_inode->i_mode)) { cFYI(1, ("Directory inode")); tmp_inode->i_op = &cifs_dir_inode_ops; tmp_inode->i_fop = &cifs_dir_ops; } else if (S_ISLNK(tmp_inode->i_mode)) { cFYI(1, ("Symbolic Link inode")); tmp_inode->i_op = &cifs_symlink_inode_ops; } else { cFYI(1, ("Init special inode")); init_special_inode(tmp_inode, tmp_inode->i_mode, tmp_inode->i_rdev); } }
/* * check that a dentry lookup hit has found a valid entry * - NOTE! the hit can be a negative hit too, so we can't assume we have an * inode * (derived from nfs_lookup_revalidate) */ static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd) { struct afs_dir_lookup_cookie cookie; struct dentry *parent; struct inode *inode, *dir; unsigned fpos; int ret; _enter("{sb=%p n=%s},", dentry->d_sb, dentry->d_name.name); /* lock down the parent dentry so we can peer at it */ parent = dget_parent(dentry->d_parent); dir = parent->d_inode; inode = dentry->d_inode; /* handle a negative dentry */ if (!inode) goto out_bad; /* handle a bad inode */ if (is_bad_inode(inode)) { printk("kAFS: afs_d_revalidate: %s/%s has bad inode\n", dentry->d_parent->d_name.name, dentry->d_name.name); goto out_bad; } /* force a full look up if the parent directory changed since last the * server was consulted * - otherwise this inode must still exist, even if the inode details * themselves have changed */ if (AFS_FS_I(dir)->flags & AFS_VNODE_CHANGED) afs_vnode_fetch_status(AFS_FS_I(dir)); if (AFS_FS_I(dir)->flags & AFS_VNODE_DELETED) { _debug("%s: parent dir deleted", dentry->d_name.name); goto out_bad; } if (AFS_FS_I(inode)->flags & AFS_VNODE_DELETED) { _debug("%s: file already deleted", dentry->d_name.name); goto out_bad; } if ((unsigned long) dentry->d_fsdata != (unsigned long) AFS_FS_I(dir)->status.version) { _debug("%s: parent changed %lu -> %u", dentry->d_name.name, (unsigned long) dentry->d_fsdata, (unsigned) AFS_FS_I(dir)->status.version); /* search the directory for this vnode */ cookie.name = dentry->d_name.name; cookie.nlen = dentry->d_name.len; cookie.fid.vid = AFS_FS_I(inode)->volume->vid; cookie.found = 0; fpos = 0; ret = afs_dir_iterate(dir, &fpos, &cookie, afs_dir_lookup_filldir); if (ret < 0) { _debug("failed to iterate dir %s: %d", parent->d_name.name, ret); goto out_bad; } if (!cookie.found) { _debug("%s: dirent not found", dentry->d_name.name); goto not_found; } /* if the vnode ID has changed, then the dirent points to a * different file */ if (cookie.fid.vnode != AFS_FS_I(inode)->fid.vnode) { _debug("%s: dirent changed", dentry->d_name.name); goto not_found; } /* if the vnode ID uniqifier has changed, then the file has * been deleted */ if (cookie.fid.unique != AFS_FS_I(inode)->fid.unique) { _debug("%s: file deleted (uq %u -> %u I:%lu)", dentry->d_name.name, cookie.fid.unique, AFS_FS_I(inode)->fid.unique, inode->i_version); spin_lock(&AFS_FS_I(inode)->lock); AFS_FS_I(inode)->flags |= AFS_VNODE_DELETED; spin_unlock(&AFS_FS_I(inode)->lock); invalidate_remote_inode(inode); goto out_bad; } dentry->d_fsdata = (void *) (unsigned long) AFS_FS_I(dir)->status.version; } out_valid: dput(parent); _leave(" = 1 [valid]"); return 1; /* the dirent, if it exists, now points to a different vnode */ not_found: spin_lock(&dentry->d_lock); dentry->d_flags |= DCACHE_NFSFS_RENAMED; spin_unlock(&dentry->d_lock); out_bad: if (inode) { /* don't unhash if we have submounts */ if (have_submounts(dentry)) goto out_valid; } shrink_dcache_parent(dentry); _debug("dropping dentry %s/%s", dentry->d_parent->d_name.name, dentry->d_name.name); d_drop(dentry); dput(parent); _leave(" = 0 [bad]"); return 0; } /* end afs_d_revalidate() */
static void fill_in_inode(struct inode *tmp_inode, FILE_DIRECTORY_INFO *pfindData, int *pobject_type, int isNewInode) { loff_t local_size; struct timespec local_mtime; struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); __u32 attr = le32_to_cpu(pfindData->ExtFileAttributes); __u64 allocation_size = le64_to_cpu(pfindData->AllocationSize); __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile); cifsInfo->cifsAttrs = attr; cifsInfo->time = jiffies; /* save mtime and size */ local_mtime = tmp_inode->i_mtime; local_size = tmp_inode->i_size; /* Linux can not store file creation time unfortunately so ignore it */ tmp_inode->i_atime = cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); tmp_inode->i_mtime = cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime)); tmp_inode->i_ctime = cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime)); /* treat dos attribute of read-only as read-only mode bit e.g. 555? */ /* 2767 perms - indicate mandatory locking */ /* BB fill in uid and gid here? with help from winbind? or retrieve from NTFS stream extended attribute */ if (atomic_read(&cifsInfo->inUse) == 0) { tmp_inode->i_uid = cifs_sb->mnt_uid; tmp_inode->i_gid = cifs_sb->mnt_gid; /* set default mode. will override for dirs below */ tmp_inode->i_mode = cifs_sb->mnt_file_mode; } if (attr & ATTR_DIRECTORY) { *pobject_type = DT_DIR; /* override default perms since we do not lock dirs */ if(atomic_read(&cifsInfo->inUse) == 0) { tmp_inode->i_mode = cifs_sb->mnt_dir_mode; } tmp_inode->i_mode |= S_IFDIR; /* we no longer mark these because we could not follow them */ /* } else if (attr & ATTR_REPARSE) { *pobject_type = DT_LNK; tmp_inode->i_mode |= S_IFLNK; */ } else { *pobject_type = DT_REG; tmp_inode->i_mode |= S_IFREG; if (attr & ATTR_READONLY) tmp_inode->i_mode &= ~(S_IWUGO); } /* could add code here - to validate if device or weird share type? */ /* can not fill in nlink here as in qpathinfo version and Unx search */ if (atomic_read(&cifsInfo->inUse) == 0) { atomic_set(&cifsInfo->inUse, 1); } if (is_size_safe_to_change(cifsInfo)) { /* can not safely change the file size here if the client is writing to it due to potential races */ i_size_write(tmp_inode, end_of_file); /* 512 bytes (2**9) is the fake blocksize that must be used */ /* for this calculation, even though the reported blocksize is larger */ tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9; } if (allocation_size < end_of_file) cFYI(1, ("May be sparse file, allocation less than file size")); cFYI(1, ("File Size %ld and blocks %ld and blocksize %ld", (unsigned long)tmp_inode->i_size, tmp_inode->i_blocks, tmp_inode->i_blksize)); if (S_ISREG(tmp_inode->i_mode)) { cFYI(1, ("File inode")); tmp_inode->i_op = &cifs_file_inode_ops; if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) tmp_inode->i_fop = &cifs_file_direct_ops; else tmp_inode->i_fop = &cifs_file_ops; tmp_inode->i_data.a_ops = &cifs_addr_ops; if(isNewInode) return; /* No sense invalidating pages for new inode since we have not started caching readahead file data yet */ if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && (local_size == tmp_inode->i_size)) { cFYI(1, ("inode exists but unchanged")); } else { /* file may have changed on server */ cFYI(1, ("invalidate inode, readdir detected change")); invalidate_remote_inode(tmp_inode); } } else if (S_ISDIR(tmp_inode->i_mode)) { cFYI(1, ("Directory inode")); tmp_inode->i_op = &cifs_dir_inode_ops; tmp_inode->i_fop = &cifs_dir_ops; } else if (S_ISLNK(tmp_inode->i_mode)) { cFYI(1, ("Symbolic Link inode")); tmp_inode->i_op = &cifs_symlink_inode_ops; } else { cFYI(1, ("Init special inode")); init_special_inode(tmp_inode, tmp_inode->i_mode, tmp_inode->i_rdev); } }
static int cifs_oplock_thread(void * dummyarg) { struct oplock_q_entry * oplock_item; struct cifsTconInfo *pTcon; struct inode * inode; __u16 netfid; int rc; daemonize("cifsoplockd"); allow_signal(SIGTERM); oplockThread = current; do { set_current_state(TASK_INTERRUPTIBLE); schedule_timeout(1*HZ); spin_lock(&GlobalMid_Lock); if(list_empty(&GlobalOplock_Q)) { spin_unlock(&GlobalMid_Lock); set_current_state(TASK_INTERRUPTIBLE); schedule_timeout(39*HZ); } else { oplock_item = list_entry(GlobalOplock_Q.next, struct oplock_q_entry, qhead); if(oplock_item) { cFYI(1,("found oplock item to write out")); pTcon = oplock_item->tcon; inode = oplock_item->pinode; netfid = oplock_item->netfid; spin_unlock(&GlobalMid_Lock); DeleteOplockQEntry(oplock_item); /* can not grab inode sem here since it would deadlock when oplock received on delete since vfs_unlink holds the i_sem across the call */ /* down(&inode->i_sem);*/ if (S_ISREG(inode->i_mode)) { rc = filemap_fdatawrite(inode->i_mapping); if(CIFS_I(inode)->clientCanCacheRead == 0) { filemap_fdatawait(inode->i_mapping); invalidate_remote_inode(inode); } } else rc = 0; /* up(&inode->i_sem);*/ if (rc) CIFS_I(inode)->write_behind_rc = rc; cFYI(1,("Oplock flush inode %p rc %d",inode,rc)); /* releasing a stale oplock after recent reconnection of smb session using a now incorrect file handle is not a data integrity issue but do not bother sending an oplock release if session to server still is disconnected since oplock already released by the server in that case */ if(pTcon->tidStatus != CifsNeedReconnect) { rc = CIFSSMBLock(0, pTcon, netfid, 0 /* len */ , 0 /* offset */, 0, 0, LOCKING_ANDX_OPLOCK_RELEASE, 0 /* wait flag */); cFYI(1,("Oplock release rc = %d ",rc)); } } else spin_unlock(&GlobalMid_Lock); } } while(!signal_pending(current)); complete_and_exit (&cifs_oplock_exited, 0); oplockThread = NULL; }
static int cifs_oplock_thread(void *dummyarg) { struct oplock_q_entry *oplock_item; struct cifsTconInfo *pTcon; struct inode *inode; __u16 netfid; int rc, waitrc = 0; set_freezable(); do { if (try_to_freeze()) continue; spin_lock(&GlobalMid_Lock); if (list_empty(&GlobalOplock_Q)) { spin_unlock(&GlobalMid_Lock); set_current_state(TASK_INTERRUPTIBLE); schedule_timeout(39*HZ); } else { oplock_item = list_entry(GlobalOplock_Q.next, struct oplock_q_entry, qhead); cFYI(1, ("found oplock item to write out")); pTcon = oplock_item->tcon; inode = oplock_item->pinode; netfid = oplock_item->netfid; spin_unlock(&GlobalMid_Lock); DeleteOplockQEntry(oplock_item); /* can not grab inode sem here since it would deadlock when oplock received on delete since vfs_unlink holds the i_mutex across the call */ /* mutex_lock(&inode->i_mutex);*/ if (S_ISREG(inode->i_mode)) { #ifdef CONFIG_CIFS_EXPERIMENTAL if (CIFS_I(inode)->clientCanCacheAll == 0) break_lease(inode, FMODE_READ); else if (CIFS_I(inode)->clientCanCacheRead == 0) break_lease(inode, FMODE_WRITE); #endif rc = filemap_fdatawrite(inode->i_mapping); if (CIFS_I(inode)->clientCanCacheRead == 0) { waitrc = filemap_fdatawait( inode->i_mapping); invalidate_remote_inode(inode); } if (rc == 0) rc = waitrc; } else rc = 0; /* mutex_unlock(&inode->i_mutex);*/ if (rc) CIFS_I(inode)->write_behind_rc = rc; cFYI(1, ("Oplock flush inode %p rc %d", inode, rc)); /* releasing stale oplock after recent reconnect of smb session using a now incorrect file handle is not a data integrity issue but do not bother sending an oplock release if session to server still is disconnected since oplock already released by the server in that case */ if (!pTcon->need_reconnect) { rc = CIFSSMBLock(0, pTcon, netfid, 0 /* len */ , 0 /* offset */, 0, 0, LOCKING_ANDX_OPLOCK_RELEASE, false /* wait flag */); cFYI(1, ("Oplock release rc = %d", rc)); } set_current_state(TASK_INTERRUPTIBLE); schedule_timeout(1); /* yield in case q were corrupt */ } } while (!kthread_should_stop()); return 0; }
int cifs_revalidate(struct dentry *direntry) { int xid; int rc = 0; char *full_path; struct cifs_sb_info *cifs_sb; struct cifsInodeInfo *cifsInode; loff_t local_size; struct timespec local_mtime; int invalidate_inode = FALSE; if(direntry->d_inode == NULL) return -ENOENT; cifsInode = CIFS_I(direntry->d_inode); if(cifsInode == NULL) return -ENOENT; /* no sense revalidating inode info on file that no one can write */ if(CIFS_I(direntry->d_inode)->clientCanCacheRead) return rc; xid = GetXid(); cifs_sb = CIFS_SB(direntry->d_sb); /* can not safely grab the rename sem here if rename calls revalidate since that would deadlock */ full_path = build_path_from_dentry(direntry); if(full_path == NULL) { FreeXid(xid); return -ENOMEM; } cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld", full_path, direntry->d_inode, direntry->d_inode->i_count.counter, direntry, direntry->d_time, jiffies)); if (cifsInode->time == 0){ /* was set to zero previously to force revalidate */ } else if (time_before(jiffies, cifsInode->time + HZ) && lookupCacheEnabled) { if((S_ISREG(direntry->d_inode->i_mode) == 0) || (direntry->d_inode->i_nlink == 1)) { if (full_path) kfree(full_path); FreeXid(xid); return rc; } else { cFYI(1,("Have to revalidate file due to hardlinks")); } } /* save mtime and size */ local_mtime = direntry->d_inode->i_mtime; local_size = direntry->d_inode->i_size; if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) { rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path, direntry->d_sb,xid); if(rc) { cFYI(1,("error on getting revalidate info %d",rc)); /* if(rc != -ENOENT) rc = 0; */ /* BB should we cache info on certain errors? */ } } else { rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL, direntry->d_sb,xid); if(rc) { cFYI(1,("error on getting revalidate info %d",rc)); /* if(rc != -ENOENT) rc = 0; */ /* BB should we cache info on certain errors? */ } } /* should we remap certain errors, access denied?, to zero */ /* if not oplocked, we invalidate inode pages if mtime or file size had changed on server */ if(timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) && (local_size == direntry->d_inode->i_size)) { cFYI(1,("cifs_revalidate - inode unchanged")); } else { /* file may have changed on server */ if(cifsInode->clientCanCacheRead) { /* no need to invalidate inode pages since we were the only ones who could have modified the file and the server copy is staler than ours */ } else { invalidate_inode = TRUE; } } /* can not grab this sem since kernel filesys locking documentation indicates i_sem may be taken by the kernel on lookup and rename which could deadlock if we grab the i_sem here as well */ /* down(&direntry->d_inode->i_sem);*/ /* need to write out dirty pages here */ if(direntry->d_inode->i_mapping) { /* do we need to lock inode until after invalidate completes below? */ filemap_fdatawrite(direntry->d_inode->i_mapping); } if(invalidate_inode) { filemap_fdatawait(direntry->d_inode->i_mapping); /* may eventually have to do this for open files too */ if(list_empty(&(cifsInode->openFileList))) { /* Has changed on server - flush read ahead pages */ cFYI(1,("Invalidating read ahead data on closed file")); invalidate_remote_inode(direntry->d_inode); } } /* up(&direntry->d_inode->i_sem);*/ if (full_path) kfree(full_path); FreeXid(xid); return rc; }