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![Tahsin Erdogan](/assets/img/avatar_default.png)
We don't need acls on xattr inodes because they are not directly accessible from user mode. Besides lockdep complains about recursive locking of xattr_sem as seen below. ============================================= [ INFO: possible recursive locking detected ] 4.11.0-rc8+ #402 Not tainted --------------------------------------------- python/1894 is trying to acquire lock: (&ei->xattr_sem){++++..}, at: [<ffffffff804878a6>] ext4_xattr_get+0x66/0x270 but task is already holding lock: (&ei->xattr_sem){++++..}, at: [<ffffffff80489500>] ext4_xattr_set_handle+0xa0/0x5d0 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&ei->xattr_sem); lock(&ei->xattr_sem); *** DEADLOCK *** May be due to missing lock nesting notation 3 locks held by python/1894: #0: (sb_writers#10){.+.+.+}, at: [<ffffffff803d829f>] mnt_want_write+0x1f/0x50 #1: (&sb->s_type->i_mutex_key#15){+.+...}, at: [<ffffffff803dda27>] vfs_setxattr+0x57/0xb0 #2: (&ei->xattr_sem){++++..}, at: [<ffffffff80489500>] ext4_xattr_set_handle+0xa0/0x5d0 stack backtrace: CPU: 0 PID: 1894 Comm: python Not tainted 4.11.0-rc8+ #402 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Call Trace: dump_stack+0x67/0x99 __lock_acquire+0x5f3/0x1830 lock_acquire+0xb5/0x1d0 down_read+0x2f/0x60 ext4_xattr_get+0x66/0x270 ext4_get_acl+0x43/0x1e0 get_acl+0x72/0xf0 posix_acl_create+0x5e/0x170 ext4_init_acl+0x21/0xc0 __ext4_new_inode+0xffd/0x16b0 ext4_xattr_set_entry+0x5ea/0xb70 ext4_xattr_block_set+0x1b5/0x970 ext4_xattr_set_handle+0x351/0x5d0 ext4_xattr_set+0x124/0x180 ext4_xattr_user_set+0x34/0x40 __vfs_setxattr+0x66/0x80 __vfs_setxattr_noperm+0x69/0x1c0 vfs_setxattr+0xa2/0xb0 setxattr+0x129/0x160 path_setxattr+0x87/0xb0 SyS_setxattr+0xf/0x20 entry_SYSCALL_64_fastpath+0x18/0xad Signed-off-by: Tahsin Erdogan <tahsin@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
680 lines
17 KiB
C
680 lines
17 KiB
C
/*
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* Copyright IBM Corporation, 2007
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* Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2.1 of the GNU Lesser General Public License
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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*/
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#include <linux/slab.h>
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#include "ext4_jbd2.h"
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#include "ext4_extents.h"
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/*
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* The contiguous blocks details which can be
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* represented by a single extent
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*/
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struct migrate_struct {
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ext4_lblk_t first_block, last_block, curr_block;
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ext4_fsblk_t first_pblock, last_pblock;
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};
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static int finish_range(handle_t *handle, struct inode *inode,
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struct migrate_struct *lb)
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{
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int retval = 0, needed;
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struct ext4_extent newext;
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struct ext4_ext_path *path;
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if (lb->first_pblock == 0)
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return 0;
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/* Add the extent to temp inode*/
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newext.ee_block = cpu_to_le32(lb->first_block);
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newext.ee_len = cpu_to_le16(lb->last_block - lb->first_block + 1);
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ext4_ext_store_pblock(&newext, lb->first_pblock);
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/* Locking only for convinience since we are operating on temp inode */
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down_write(&EXT4_I(inode)->i_data_sem);
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path = ext4_find_extent(inode, lb->first_block, NULL, 0);
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if (IS_ERR(path)) {
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retval = PTR_ERR(path);
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path = NULL;
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goto err_out;
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}
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/*
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* Calculate the credit needed to inserting this extent
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* Since we are doing this in loop we may accumalate extra
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* credit. But below we try to not accumalate too much
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* of them by restarting the journal.
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*/
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needed = ext4_ext_calc_credits_for_single_extent(inode,
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lb->last_block - lb->first_block + 1, path);
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/*
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* Make sure the credit we accumalated is not really high
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*/
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if (needed && ext4_handle_has_enough_credits(handle,
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EXT4_RESERVE_TRANS_BLOCKS)) {
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up_write((&EXT4_I(inode)->i_data_sem));
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retval = ext4_journal_restart(handle, needed);
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down_write((&EXT4_I(inode)->i_data_sem));
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if (retval)
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goto err_out;
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} else if (needed) {
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retval = ext4_journal_extend(handle, needed);
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if (retval) {
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/*
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* IF not able to extend the journal restart the journal
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*/
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up_write((&EXT4_I(inode)->i_data_sem));
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retval = ext4_journal_restart(handle, needed);
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down_write((&EXT4_I(inode)->i_data_sem));
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if (retval)
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goto err_out;
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}
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}
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retval = ext4_ext_insert_extent(handle, inode, &path, &newext, 0);
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err_out:
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up_write((&EXT4_I(inode)->i_data_sem));
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ext4_ext_drop_refs(path);
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kfree(path);
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lb->first_pblock = 0;
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return retval;
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}
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static int update_extent_range(handle_t *handle, struct inode *inode,
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ext4_fsblk_t pblock, struct migrate_struct *lb)
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{
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int retval;
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/*
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* See if we can add on to the existing range (if it exists)
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*/
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if (lb->first_pblock &&
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(lb->last_pblock+1 == pblock) &&
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(lb->last_block+1 == lb->curr_block)) {
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lb->last_pblock = pblock;
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lb->last_block = lb->curr_block;
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lb->curr_block++;
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return 0;
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}
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/*
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* Start a new range.
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*/
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retval = finish_range(handle, inode, lb);
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lb->first_pblock = lb->last_pblock = pblock;
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lb->first_block = lb->last_block = lb->curr_block;
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lb->curr_block++;
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return retval;
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}
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static int update_ind_extent_range(handle_t *handle, struct inode *inode,
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ext4_fsblk_t pblock,
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struct migrate_struct *lb)
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{
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struct buffer_head *bh;
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__le32 *i_data;
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int i, retval = 0;
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unsigned long max_entries = inode->i_sb->s_blocksize >> 2;
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bh = sb_bread(inode->i_sb, pblock);
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if (!bh)
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return -EIO;
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i_data = (__le32 *)bh->b_data;
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for (i = 0; i < max_entries; i++) {
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if (i_data[i]) {
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retval = update_extent_range(handle, inode,
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le32_to_cpu(i_data[i]), lb);
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if (retval)
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break;
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} else {
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lb->curr_block++;
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}
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}
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put_bh(bh);
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return retval;
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}
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static int update_dind_extent_range(handle_t *handle, struct inode *inode,
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ext4_fsblk_t pblock,
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struct migrate_struct *lb)
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{
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struct buffer_head *bh;
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__le32 *i_data;
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int i, retval = 0;
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unsigned long max_entries = inode->i_sb->s_blocksize >> 2;
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bh = sb_bread(inode->i_sb, pblock);
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if (!bh)
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return -EIO;
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i_data = (__le32 *)bh->b_data;
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for (i = 0; i < max_entries; i++) {
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if (i_data[i]) {
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retval = update_ind_extent_range(handle, inode,
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le32_to_cpu(i_data[i]), lb);
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if (retval)
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break;
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} else {
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/* Only update the file block number */
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lb->curr_block += max_entries;
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}
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}
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put_bh(bh);
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return retval;
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}
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static int update_tind_extent_range(handle_t *handle, struct inode *inode,
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ext4_fsblk_t pblock,
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struct migrate_struct *lb)
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{
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struct buffer_head *bh;
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__le32 *i_data;
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int i, retval = 0;
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unsigned long max_entries = inode->i_sb->s_blocksize >> 2;
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bh = sb_bread(inode->i_sb, pblock);
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if (!bh)
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return -EIO;
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i_data = (__le32 *)bh->b_data;
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for (i = 0; i < max_entries; i++) {
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if (i_data[i]) {
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retval = update_dind_extent_range(handle, inode,
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le32_to_cpu(i_data[i]), lb);
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if (retval)
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break;
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} else {
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/* Only update the file block number */
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lb->curr_block += max_entries * max_entries;
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}
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}
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put_bh(bh);
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return retval;
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}
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static int extend_credit_for_blkdel(handle_t *handle, struct inode *inode)
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{
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int retval = 0, needed;
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if (ext4_handle_has_enough_credits(handle, EXT4_RESERVE_TRANS_BLOCKS+1))
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return 0;
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/*
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* We are freeing a blocks. During this we touch
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* superblock, group descriptor and block bitmap.
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* So allocate a credit of 3. We may update
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* quota (user and group).
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*/
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needed = 3 + EXT4_MAXQUOTAS_TRANS_BLOCKS(inode->i_sb);
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if (ext4_journal_extend(handle, needed) != 0)
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retval = ext4_journal_restart(handle, needed);
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return retval;
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}
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static int free_dind_blocks(handle_t *handle,
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struct inode *inode, __le32 i_data)
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{
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int i;
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__le32 *tmp_idata;
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struct buffer_head *bh;
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unsigned long max_entries = inode->i_sb->s_blocksize >> 2;
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bh = sb_bread(inode->i_sb, le32_to_cpu(i_data));
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if (!bh)
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return -EIO;
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tmp_idata = (__le32 *)bh->b_data;
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for (i = 0; i < max_entries; i++) {
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if (tmp_idata[i]) {
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extend_credit_for_blkdel(handle, inode);
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ext4_free_blocks(handle, inode, NULL,
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le32_to_cpu(tmp_idata[i]), 1,
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EXT4_FREE_BLOCKS_METADATA |
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EXT4_FREE_BLOCKS_FORGET);
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}
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}
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put_bh(bh);
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extend_credit_for_blkdel(handle, inode);
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ext4_free_blocks(handle, inode, NULL, le32_to_cpu(i_data), 1,
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EXT4_FREE_BLOCKS_METADATA |
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EXT4_FREE_BLOCKS_FORGET);
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return 0;
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}
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static int free_tind_blocks(handle_t *handle,
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struct inode *inode, __le32 i_data)
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{
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int i, retval = 0;
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__le32 *tmp_idata;
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struct buffer_head *bh;
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unsigned long max_entries = inode->i_sb->s_blocksize >> 2;
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bh = sb_bread(inode->i_sb, le32_to_cpu(i_data));
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if (!bh)
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return -EIO;
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tmp_idata = (__le32 *)bh->b_data;
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for (i = 0; i < max_entries; i++) {
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if (tmp_idata[i]) {
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retval = free_dind_blocks(handle,
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inode, tmp_idata[i]);
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if (retval) {
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put_bh(bh);
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return retval;
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}
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}
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}
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put_bh(bh);
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extend_credit_for_blkdel(handle, inode);
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ext4_free_blocks(handle, inode, NULL, le32_to_cpu(i_data), 1,
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EXT4_FREE_BLOCKS_METADATA |
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EXT4_FREE_BLOCKS_FORGET);
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return 0;
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}
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static int free_ind_block(handle_t *handle, struct inode *inode, __le32 *i_data)
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{
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int retval;
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/* ei->i_data[EXT4_IND_BLOCK] */
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if (i_data[0]) {
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extend_credit_for_blkdel(handle, inode);
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ext4_free_blocks(handle, inode, NULL,
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le32_to_cpu(i_data[0]), 1,
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EXT4_FREE_BLOCKS_METADATA |
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EXT4_FREE_BLOCKS_FORGET);
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}
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/* ei->i_data[EXT4_DIND_BLOCK] */
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if (i_data[1]) {
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retval = free_dind_blocks(handle, inode, i_data[1]);
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if (retval)
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return retval;
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}
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/* ei->i_data[EXT4_TIND_BLOCK] */
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if (i_data[2]) {
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retval = free_tind_blocks(handle, inode, i_data[2]);
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if (retval)
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return retval;
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}
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return 0;
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}
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static int ext4_ext_swap_inode_data(handle_t *handle, struct inode *inode,
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struct inode *tmp_inode)
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{
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int retval;
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__le32 i_data[3];
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struct ext4_inode_info *ei = EXT4_I(inode);
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struct ext4_inode_info *tmp_ei = EXT4_I(tmp_inode);
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/*
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* One credit accounted for writing the
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* i_data field of the original inode
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*/
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retval = ext4_journal_extend(handle, 1);
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if (retval) {
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retval = ext4_journal_restart(handle, 1);
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if (retval)
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goto err_out;
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}
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i_data[0] = ei->i_data[EXT4_IND_BLOCK];
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i_data[1] = ei->i_data[EXT4_DIND_BLOCK];
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i_data[2] = ei->i_data[EXT4_TIND_BLOCK];
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down_write(&EXT4_I(inode)->i_data_sem);
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/*
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* if EXT4_STATE_EXT_MIGRATE is cleared a block allocation
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* happened after we started the migrate. We need to
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* fail the migrate
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*/
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if (!ext4_test_inode_state(inode, EXT4_STATE_EXT_MIGRATE)) {
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retval = -EAGAIN;
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up_write(&EXT4_I(inode)->i_data_sem);
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goto err_out;
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} else
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ext4_clear_inode_state(inode, EXT4_STATE_EXT_MIGRATE);
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/*
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* We have the extent map build with the tmp inode.
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* Now copy the i_data across
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*/
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ext4_set_inode_flag(inode, EXT4_INODE_EXTENTS);
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memcpy(ei->i_data, tmp_ei->i_data, sizeof(ei->i_data));
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/*
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* Update i_blocks with the new blocks that got
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* allocated while adding extents for extent index
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* blocks.
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*
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* While converting to extents we need not
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* update the original inode i_blocks for extent blocks
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* via quota APIs. The quota update happened via tmp_inode already.
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*/
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spin_lock(&inode->i_lock);
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inode->i_blocks += tmp_inode->i_blocks;
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spin_unlock(&inode->i_lock);
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up_write(&EXT4_I(inode)->i_data_sem);
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/*
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* We mark the inode dirty after, because we decrement the
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* i_blocks when freeing the indirect meta-data blocks
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*/
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retval = free_ind_block(handle, inode, i_data);
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ext4_mark_inode_dirty(handle, inode);
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err_out:
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return retval;
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}
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static int free_ext_idx(handle_t *handle, struct inode *inode,
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struct ext4_extent_idx *ix)
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{
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int i, retval = 0;
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ext4_fsblk_t block;
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struct buffer_head *bh;
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struct ext4_extent_header *eh;
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block = ext4_idx_pblock(ix);
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bh = sb_bread(inode->i_sb, block);
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if (!bh)
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return -EIO;
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eh = (struct ext4_extent_header *)bh->b_data;
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if (eh->eh_depth != 0) {
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ix = EXT_FIRST_INDEX(eh);
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for (i = 0; i < le16_to_cpu(eh->eh_entries); i++, ix++) {
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retval = free_ext_idx(handle, inode, ix);
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if (retval)
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break;
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}
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}
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put_bh(bh);
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extend_credit_for_blkdel(handle, inode);
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ext4_free_blocks(handle, inode, NULL, block, 1,
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EXT4_FREE_BLOCKS_METADATA | EXT4_FREE_BLOCKS_FORGET);
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return retval;
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}
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/*
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* Free the extent meta data blocks only
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*/
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static int free_ext_block(handle_t *handle, struct inode *inode)
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{
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int i, retval = 0;
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struct ext4_inode_info *ei = EXT4_I(inode);
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struct ext4_extent_header *eh = (struct ext4_extent_header *)ei->i_data;
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struct ext4_extent_idx *ix;
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if (eh->eh_depth == 0)
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/*
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* No extra blocks allocated for extent meta data
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*/
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return 0;
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ix = EXT_FIRST_INDEX(eh);
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for (i = 0; i < le16_to_cpu(eh->eh_entries); i++, ix++) {
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retval = free_ext_idx(handle, inode, ix);
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if (retval)
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return retval;
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}
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return retval;
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}
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int ext4_ext_migrate(struct inode *inode)
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{
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handle_t *handle;
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int retval = 0, i;
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__le32 *i_data;
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struct ext4_inode_info *ei;
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struct inode *tmp_inode = NULL;
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struct migrate_struct lb;
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unsigned long max_entries;
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__u32 goal;
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uid_t owner[2];
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/*
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* If the filesystem does not support extents, or the inode
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* already is extent-based, error out.
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*/
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if (!ext4_has_feature_extents(inode->i_sb) ||
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(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)))
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return -EINVAL;
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if (S_ISLNK(inode->i_mode) && inode->i_blocks == 0)
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/*
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|
* don't migrate fast symlink
|
|
*/
|
|
return retval;
|
|
|
|
/*
|
|
* Worst case we can touch the allocation bitmaps, a bgd
|
|
* block, and a block to link in the orphan list. We do need
|
|
* need to worry about credits for modifying the quota inode.
|
|
*/
|
|
handle = ext4_journal_start(inode, EXT4_HT_MIGRATE,
|
|
4 + EXT4_MAXQUOTAS_TRANS_BLOCKS(inode->i_sb));
|
|
|
|
if (IS_ERR(handle)) {
|
|
retval = PTR_ERR(handle);
|
|
return retval;
|
|
}
|
|
goal = (((inode->i_ino - 1) / EXT4_INODES_PER_GROUP(inode->i_sb)) *
|
|
EXT4_INODES_PER_GROUP(inode->i_sb)) + 1;
|
|
owner[0] = i_uid_read(inode);
|
|
owner[1] = i_gid_read(inode);
|
|
tmp_inode = ext4_new_inode(handle, d_inode(inode->i_sb->s_root),
|
|
S_IFREG, NULL, goal, owner, 0);
|
|
if (IS_ERR(tmp_inode)) {
|
|
retval = PTR_ERR(tmp_inode);
|
|
ext4_journal_stop(handle);
|
|
return retval;
|
|
}
|
|
i_size_write(tmp_inode, i_size_read(inode));
|
|
/*
|
|
* Set the i_nlink to zero so it will be deleted later
|
|
* when we drop inode reference.
|
|
*/
|
|
clear_nlink(tmp_inode);
|
|
|
|
ext4_ext_tree_init(handle, tmp_inode);
|
|
ext4_orphan_add(handle, tmp_inode);
|
|
ext4_journal_stop(handle);
|
|
|
|
/*
|
|
* start with one credit accounted for
|
|
* superblock modification.
|
|
*
|
|
* For the tmp_inode we already have committed the
|
|
* transaction that created the inode. Later as and
|
|
* when we add extents we extent the journal
|
|
*/
|
|
/*
|
|
* Even though we take i_mutex we can still cause block
|
|
* allocation via mmap write to holes. If we have allocated
|
|
* new blocks we fail migrate. New block allocation will
|
|
* clear EXT4_STATE_EXT_MIGRATE flag. The flag is updated
|
|
* with i_data_sem held to prevent racing with block
|
|
* allocation.
|
|
*/
|
|
down_read(&EXT4_I(inode)->i_data_sem);
|
|
ext4_set_inode_state(inode, EXT4_STATE_EXT_MIGRATE);
|
|
up_read((&EXT4_I(inode)->i_data_sem));
|
|
|
|
handle = ext4_journal_start(inode, EXT4_HT_MIGRATE, 1);
|
|
if (IS_ERR(handle)) {
|
|
/*
|
|
* It is impossible to update on-disk structures without
|
|
* a handle, so just rollback in-core changes and live other
|
|
* work to orphan_list_cleanup()
|
|
*/
|
|
ext4_orphan_del(NULL, tmp_inode);
|
|
retval = PTR_ERR(handle);
|
|
goto out;
|
|
}
|
|
|
|
ei = EXT4_I(inode);
|
|
i_data = ei->i_data;
|
|
memset(&lb, 0, sizeof(lb));
|
|
|
|
/* 32 bit block address 4 bytes */
|
|
max_entries = inode->i_sb->s_blocksize >> 2;
|
|
for (i = 0; i < EXT4_NDIR_BLOCKS; i++) {
|
|
if (i_data[i]) {
|
|
retval = update_extent_range(handle, tmp_inode,
|
|
le32_to_cpu(i_data[i]), &lb);
|
|
if (retval)
|
|
goto err_out;
|
|
} else
|
|
lb.curr_block++;
|
|
}
|
|
if (i_data[EXT4_IND_BLOCK]) {
|
|
retval = update_ind_extent_range(handle, tmp_inode,
|
|
le32_to_cpu(i_data[EXT4_IND_BLOCK]), &lb);
|
|
if (retval)
|
|
goto err_out;
|
|
} else
|
|
lb.curr_block += max_entries;
|
|
if (i_data[EXT4_DIND_BLOCK]) {
|
|
retval = update_dind_extent_range(handle, tmp_inode,
|
|
le32_to_cpu(i_data[EXT4_DIND_BLOCK]), &lb);
|
|
if (retval)
|
|
goto err_out;
|
|
} else
|
|
lb.curr_block += max_entries * max_entries;
|
|
if (i_data[EXT4_TIND_BLOCK]) {
|
|
retval = update_tind_extent_range(handle, tmp_inode,
|
|
le32_to_cpu(i_data[EXT4_TIND_BLOCK]), &lb);
|
|
if (retval)
|
|
goto err_out;
|
|
}
|
|
/*
|
|
* Build the last extent
|
|
*/
|
|
retval = finish_range(handle, tmp_inode, &lb);
|
|
err_out:
|
|
if (retval)
|
|
/*
|
|
* Failure case delete the extent information with the
|
|
* tmp_inode
|
|
*/
|
|
free_ext_block(handle, tmp_inode);
|
|
else {
|
|
retval = ext4_ext_swap_inode_data(handle, inode, tmp_inode);
|
|
if (retval)
|
|
/*
|
|
* if we fail to swap inode data free the extent
|
|
* details of the tmp inode
|
|
*/
|
|
free_ext_block(handle, tmp_inode);
|
|
}
|
|
|
|
/* We mark the tmp_inode dirty via ext4_ext_tree_init. */
|
|
if (ext4_journal_extend(handle, 1) != 0)
|
|
ext4_journal_restart(handle, 1);
|
|
|
|
/*
|
|
* Mark the tmp_inode as of size zero
|
|
*/
|
|
i_size_write(tmp_inode, 0);
|
|
|
|
/*
|
|
* set the i_blocks count to zero
|
|
* so that the ext4_evict_inode() does the
|
|
* right job
|
|
*
|
|
* We don't need to take the i_lock because
|
|
* the inode is not visible to user space.
|
|
*/
|
|
tmp_inode->i_blocks = 0;
|
|
|
|
/* Reset the extent details */
|
|
ext4_ext_tree_init(handle, tmp_inode);
|
|
ext4_journal_stop(handle);
|
|
out:
|
|
unlock_new_inode(tmp_inode);
|
|
iput(tmp_inode);
|
|
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* Migrate a simple extent-based inode to use the i_blocks[] array
|
|
*/
|
|
int ext4_ind_migrate(struct inode *inode)
|
|
{
|
|
struct ext4_extent_header *eh;
|
|
struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es;
|
|
struct ext4_inode_info *ei = EXT4_I(inode);
|
|
struct ext4_extent *ex;
|
|
unsigned int i, len;
|
|
ext4_lblk_t start, end;
|
|
ext4_fsblk_t blk;
|
|
handle_t *handle;
|
|
int ret;
|
|
|
|
if (!ext4_has_feature_extents(inode->i_sb) ||
|
|
(!ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)))
|
|
return -EINVAL;
|
|
|
|
if (ext4_has_feature_bigalloc(inode->i_sb))
|
|
return -EOPNOTSUPP;
|
|
|
|
/*
|
|
* In order to get correct extent info, force all delayed allocation
|
|
* blocks to be allocated, otherwise delayed allocation blocks may not
|
|
* be reflected and bypass the checks on extent header.
|
|
*/
|
|
if (test_opt(inode->i_sb, DELALLOC))
|
|
ext4_alloc_da_blocks(inode);
|
|
|
|
handle = ext4_journal_start(inode, EXT4_HT_MIGRATE, 1);
|
|
if (IS_ERR(handle))
|
|
return PTR_ERR(handle);
|
|
|
|
down_write(&EXT4_I(inode)->i_data_sem);
|
|
ret = ext4_ext_check_inode(inode);
|
|
if (ret)
|
|
goto errout;
|
|
|
|
eh = ext_inode_hdr(inode);
|
|
ex = EXT_FIRST_EXTENT(eh);
|
|
if (ext4_blocks_count(es) > EXT4_MAX_BLOCK_FILE_PHYS ||
|
|
eh->eh_depth != 0 || le16_to_cpu(eh->eh_entries) > 1) {
|
|
ret = -EOPNOTSUPP;
|
|
goto errout;
|
|
}
|
|
if (eh->eh_entries == 0)
|
|
blk = len = start = end = 0;
|
|
else {
|
|
len = le16_to_cpu(ex->ee_len);
|
|
blk = ext4_ext_pblock(ex);
|
|
start = le32_to_cpu(ex->ee_block);
|
|
end = start + len - 1;
|
|
if (end >= EXT4_NDIR_BLOCKS) {
|
|
ret = -EOPNOTSUPP;
|
|
goto errout;
|
|
}
|
|
}
|
|
|
|
ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS);
|
|
memset(ei->i_data, 0, sizeof(ei->i_data));
|
|
for (i = start; i <= end; i++)
|
|
ei->i_data[i] = cpu_to_le32(blk++);
|
|
ext4_mark_inode_dirty(handle, inode);
|
|
errout:
|
|
ext4_journal_stop(handle);
|
|
up_write(&EXT4_I(inode)->i_data_sem);
|
|
return ret;
|
|
}
|