diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/xfs/xfs_rename.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/xfs/xfs_rename.c | 347 |
1 files changed, 0 insertions, 347 deletions
diff --git a/ANDROID_3.4.5/fs/xfs/xfs_rename.c b/ANDROID_3.4.5/fs/xfs/xfs_rename.c deleted file mode 100644 index e44ef7ee..00000000 --- a/ANDROID_3.4.5/fs/xfs/xfs_rename.c +++ /dev/null @@ -1,347 +0,0 @@ -/* - * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. - * All Rights Reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it would be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ -#include "xfs.h" -#include "xfs_fs.h" -#include "xfs_types.h" -#include "xfs_log.h" -#include "xfs_inum.h" -#include "xfs_trans.h" -#include "xfs_sb.h" -#include "xfs_ag.h" -#include "xfs_dir2.h" -#include "xfs_mount.h" -#include "xfs_da_btree.h" -#include "xfs_bmap_btree.h" -#include "xfs_dinode.h" -#include "xfs_inode.h" -#include "xfs_inode_item.h" -#include "xfs_bmap.h" -#include "xfs_error.h" -#include "xfs_quota.h" -#include "xfs_utils.h" -#include "xfs_trans_space.h" -#include "xfs_vnodeops.h" -#include "xfs_trace.h" - - -/* - * Enter all inodes for a rename transaction into a sorted array. - */ -STATIC void -xfs_sort_for_rename( - xfs_inode_t *dp1, /* in: old (source) directory inode */ - xfs_inode_t *dp2, /* in: new (target) directory inode */ - xfs_inode_t *ip1, /* in: inode of old entry */ - xfs_inode_t *ip2, /* in: inode of new entry, if it - already exists, NULL otherwise. */ - xfs_inode_t **i_tab,/* out: array of inode returned, sorted */ - int *num_inodes) /* out: number of inodes in array */ -{ - xfs_inode_t *temp; - int i, j; - - /* - * i_tab contains a list of pointers to inodes. We initialize - * the table here & we'll sort it. We will then use it to - * order the acquisition of the inode locks. - * - * Note that the table may contain duplicates. e.g., dp1 == dp2. - */ - i_tab[0] = dp1; - i_tab[1] = dp2; - i_tab[2] = ip1; - if (ip2) { - *num_inodes = 4; - i_tab[3] = ip2; - } else { - *num_inodes = 3; - i_tab[3] = NULL; - } - - /* - * Sort the elements via bubble sort. (Remember, there are at - * most 4 elements to sort, so this is adequate.) - */ - for (i = 0; i < *num_inodes; i++) { - for (j = 1; j < *num_inodes; j++) { - if (i_tab[j]->i_ino < i_tab[j-1]->i_ino) { - temp = i_tab[j]; - i_tab[j] = i_tab[j-1]; - i_tab[j-1] = temp; - } - } - } -} - -/* - * xfs_rename - */ -int -xfs_rename( - xfs_inode_t *src_dp, - struct xfs_name *src_name, - xfs_inode_t *src_ip, - xfs_inode_t *target_dp, - struct xfs_name *target_name, - xfs_inode_t *target_ip) -{ - xfs_trans_t *tp = NULL; - xfs_mount_t *mp = src_dp->i_mount; - int new_parent; /* moving to a new dir */ - int src_is_directory; /* src_name is a directory */ - int error; - xfs_bmap_free_t free_list; - xfs_fsblock_t first_block; - int cancel_flags; - int committed; - xfs_inode_t *inodes[4]; - int spaceres; - int num_inodes; - - trace_xfs_rename(src_dp, target_dp, src_name, target_name); - - new_parent = (src_dp != target_dp); - src_is_directory = S_ISDIR(src_ip->i_d.di_mode); - - xfs_sort_for_rename(src_dp, target_dp, src_ip, target_ip, - inodes, &num_inodes); - - xfs_bmap_init(&free_list, &first_block); - tp = xfs_trans_alloc(mp, XFS_TRANS_RENAME); - cancel_flags = XFS_TRANS_RELEASE_LOG_RES; - spaceres = XFS_RENAME_SPACE_RES(mp, target_name->len); - error = xfs_trans_reserve(tp, spaceres, XFS_RENAME_LOG_RES(mp), 0, - XFS_TRANS_PERM_LOG_RES, XFS_RENAME_LOG_COUNT); - if (error == ENOSPC) { - spaceres = 0; - error = xfs_trans_reserve(tp, 0, XFS_RENAME_LOG_RES(mp), 0, - XFS_TRANS_PERM_LOG_RES, XFS_RENAME_LOG_COUNT); - } - if (error) { - xfs_trans_cancel(tp, 0); - goto std_return; - } - - /* - * Attach the dquots to the inodes - */ - error = xfs_qm_vop_rename_dqattach(inodes); - if (error) { - xfs_trans_cancel(tp, cancel_flags); - goto std_return; - } - - /* - * Lock all the participating inodes. Depending upon whether - * the target_name exists in the target directory, and - * whether the target directory is the same as the source - * directory, we can lock from 2 to 4 inodes. - */ - xfs_lock_inodes(inodes, num_inodes, XFS_ILOCK_EXCL); - - /* - * Join all the inodes to the transaction. From this point on, - * we can rely on either trans_commit or trans_cancel to unlock - * them. - */ - xfs_trans_ijoin(tp, src_dp, XFS_ILOCK_EXCL); - if (new_parent) - xfs_trans_ijoin(tp, target_dp, XFS_ILOCK_EXCL); - xfs_trans_ijoin(tp, src_ip, XFS_ILOCK_EXCL); - if (target_ip) - xfs_trans_ijoin(tp, target_ip, XFS_ILOCK_EXCL); - - /* - * If we are using project inheritance, we only allow renames - * into our tree when the project IDs are the same; else the - * tree quota mechanism would be circumvented. - */ - if (unlikely((target_dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && - (xfs_get_projid(target_dp) != xfs_get_projid(src_ip)))) { - error = XFS_ERROR(EXDEV); - goto error_return; - } - - /* - * Set up the target. - */ - if (target_ip == NULL) { - /* - * If there's no space reservation, check the entry will - * fit before actually inserting it. - */ - error = xfs_dir_canenter(tp, target_dp, target_name, spaceres); - if (error) - goto error_return; - /* - * If target does not exist and the rename crosses - * directories, adjust the target directory link count - * to account for the ".." reference from the new entry. - */ - error = xfs_dir_createname(tp, target_dp, target_name, - src_ip->i_ino, &first_block, - &free_list, spaceres); - if (error == ENOSPC) - goto error_return; - if (error) - goto abort_return; - - xfs_trans_ichgtime(tp, target_dp, - XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); - - if (new_parent && src_is_directory) { - error = xfs_bumplink(tp, target_dp); - if (error) - goto abort_return; - } - } else { /* target_ip != NULL */ - /* - * If target exists and it's a directory, check that both - * target and source are directories and that target can be - * destroyed, or that neither is a directory. - */ - if (S_ISDIR(target_ip->i_d.di_mode)) { - /* - * Make sure target dir is empty. - */ - if (!(xfs_dir_isempty(target_ip)) || - (target_ip->i_d.di_nlink > 2)) { - error = XFS_ERROR(EEXIST); - goto error_return; - } - } - - /* - * Link the source inode under the target name. - * If the source inode is a directory and we are moving - * it across directories, its ".." entry will be - * inconsistent until we replace that down below. - * - * In case there is already an entry with the same - * name at the destination directory, remove it first. - */ - error = xfs_dir_replace(tp, target_dp, target_name, - src_ip->i_ino, - &first_block, &free_list, spaceres); - if (error) - goto abort_return; - - xfs_trans_ichgtime(tp, target_dp, - XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); - - /* - * Decrement the link count on the target since the target - * dir no longer points to it. - */ - error = xfs_droplink(tp, target_ip); - if (error) - goto abort_return; - - if (src_is_directory) { - /* - * Drop the link from the old "." entry. - */ - error = xfs_droplink(tp, target_ip); - if (error) - goto abort_return; - } - } /* target_ip != NULL */ - - /* - * Remove the source. - */ - if (new_parent && src_is_directory) { - /* - * Rewrite the ".." entry to point to the new - * directory. - */ - error = xfs_dir_replace(tp, src_ip, &xfs_name_dotdot, - target_dp->i_ino, - &first_block, &free_list, spaceres); - ASSERT(error != EEXIST); - if (error) - goto abort_return; - } - - /* - * We always want to hit the ctime on the source inode. - * - * This isn't strictly required by the standards since the source - * inode isn't really being changed, but old unix file systems did - * it and some incremental backup programs won't work without it. - */ - xfs_trans_ichgtime(tp, src_ip, XFS_ICHGTIME_CHG); - xfs_trans_log_inode(tp, src_ip, XFS_ILOG_CORE); - - /* - * Adjust the link count on src_dp. This is necessary when - * renaming a directory, either within one parent when - * the target existed, or across two parent directories. - */ - if (src_is_directory && (new_parent || target_ip != NULL)) { - - /* - * Decrement link count on src_directory since the - * entry that's moved no longer points to it. - */ - error = xfs_droplink(tp, src_dp); - if (error) - goto abort_return; - } - - error = xfs_dir_removename(tp, src_dp, src_name, src_ip->i_ino, - &first_block, &free_list, spaceres); - if (error) - goto abort_return; - - xfs_trans_ichgtime(tp, src_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); - xfs_trans_log_inode(tp, src_dp, XFS_ILOG_CORE); - if (new_parent) - xfs_trans_log_inode(tp, target_dp, XFS_ILOG_CORE); - - /* - * If this is a synchronous mount, make sure that the - * rename transaction goes to disk before returning to - * the user. - */ - if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { - xfs_trans_set_sync(tp); - } - - error = xfs_bmap_finish(&tp, &free_list, &committed); - if (error) { - xfs_bmap_cancel(&free_list); - xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES | - XFS_TRANS_ABORT)); - goto std_return; - } - - /* - * trans_commit will unlock src_ip, target_ip & decrement - * the vnode references. - */ - return xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); - - abort_return: - cancel_flags |= XFS_TRANS_ABORT; - error_return: - xfs_bmap_cancel(&free_list); - xfs_trans_cancel(tp, cancel_flags); - std_return: - return error; -} |