diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/xfs/xfs_inode_item.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/xfs/xfs_inode_item.c | 966 |
1 files changed, 0 insertions, 966 deletions
diff --git a/ANDROID_3.4.5/fs/xfs/xfs_inode_item.c b/ANDROID_3.4.5/fs/xfs/xfs_inode_item.c deleted file mode 100644 index 05d924ef..00000000 --- a/ANDROID_3.4.5/fs/xfs/xfs_inode_item.c +++ /dev/null @@ -1,966 +0,0 @@ -/* - * Copyright (c) 2000-2002,2005 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_bit.h" -#include "xfs_log.h" -#include "xfs_inum.h" -#include "xfs_trans.h" -#include "xfs_sb.h" -#include "xfs_ag.h" -#include "xfs_mount.h" -#include "xfs_trans_priv.h" -#include "xfs_bmap_btree.h" -#include "xfs_dinode.h" -#include "xfs_inode.h" -#include "xfs_inode_item.h" -#include "xfs_error.h" -#include "xfs_trace.h" - - -kmem_zone_t *xfs_ili_zone; /* inode log item zone */ - -static inline struct xfs_inode_log_item *INODE_ITEM(struct xfs_log_item *lip) -{ - return container_of(lip, struct xfs_inode_log_item, ili_item); -} - - -/* - * This returns the number of iovecs needed to log the given inode item. - * - * We need one iovec for the inode log format structure, one for the - * inode core, and possibly one for the inode data/extents/b-tree root - * and one for the inode attribute data/extents/b-tree root. - */ -STATIC uint -xfs_inode_item_size( - struct xfs_log_item *lip) -{ - struct xfs_inode_log_item *iip = INODE_ITEM(lip); - struct xfs_inode *ip = iip->ili_inode; - uint nvecs = 2; - - switch (ip->i_d.di_format) { - case XFS_DINODE_FMT_EXTENTS: - if ((iip->ili_fields & XFS_ILOG_DEXT) && - ip->i_d.di_nextents > 0 && - ip->i_df.if_bytes > 0) - nvecs++; - break; - - case XFS_DINODE_FMT_BTREE: - if ((iip->ili_fields & XFS_ILOG_DBROOT) && - ip->i_df.if_broot_bytes > 0) - nvecs++; - break; - - case XFS_DINODE_FMT_LOCAL: - if ((iip->ili_fields & XFS_ILOG_DDATA) && - ip->i_df.if_bytes > 0) - nvecs++; - break; - - case XFS_DINODE_FMT_DEV: - case XFS_DINODE_FMT_UUID: - break; - - default: - ASSERT(0); - break; - } - - if (!XFS_IFORK_Q(ip)) - return nvecs; - - - /* - * Log any necessary attribute data. - */ - switch (ip->i_d.di_aformat) { - case XFS_DINODE_FMT_EXTENTS: - if ((iip->ili_fields & XFS_ILOG_AEXT) && - ip->i_d.di_anextents > 0 && - ip->i_afp->if_bytes > 0) - nvecs++; - break; - - case XFS_DINODE_FMT_BTREE: - if ((iip->ili_fields & XFS_ILOG_ABROOT) && - ip->i_afp->if_broot_bytes > 0) - nvecs++; - break; - - case XFS_DINODE_FMT_LOCAL: - if ((iip->ili_fields & XFS_ILOG_ADATA) && - ip->i_afp->if_bytes > 0) - nvecs++; - break; - - default: - ASSERT(0); - break; - } - - return nvecs; -} - -/* - * xfs_inode_item_format_extents - convert in-core extents to on-disk form - * - * For either the data or attr fork in extent format, we need to endian convert - * the in-core extent as we place them into the on-disk inode. In this case, we - * need to do this conversion before we write the extents into the log. Because - * we don't have the disk inode to write into here, we allocate a buffer and - * format the extents into it via xfs_iextents_copy(). We free the buffer in - * the unlock routine after the copy for the log has been made. - * - * In the case of the data fork, the in-core and on-disk fork sizes can be - * different due to delayed allocation extents. We only log on-disk extents - * here, so always use the physical fork size to determine the size of the - * buffer we need to allocate. - */ -STATIC void -xfs_inode_item_format_extents( - struct xfs_inode *ip, - struct xfs_log_iovec *vecp, - int whichfork, - int type) -{ - xfs_bmbt_rec_t *ext_buffer; - - ext_buffer = kmem_alloc(XFS_IFORK_SIZE(ip, whichfork), KM_SLEEP); - if (whichfork == XFS_DATA_FORK) - ip->i_itemp->ili_extents_buf = ext_buffer; - else - ip->i_itemp->ili_aextents_buf = ext_buffer; - - vecp->i_addr = ext_buffer; - vecp->i_len = xfs_iextents_copy(ip, ext_buffer, whichfork); - vecp->i_type = type; -} - -/* - * This is called to fill in the vector of log iovecs for the - * given inode log item. It fills the first item with an inode - * log format structure, the second with the on-disk inode structure, - * and a possible third and/or fourth with the inode data/extents/b-tree - * root and inode attributes data/extents/b-tree root. - */ -STATIC void -xfs_inode_item_format( - struct xfs_log_item *lip, - struct xfs_log_iovec *vecp) -{ - struct xfs_inode_log_item *iip = INODE_ITEM(lip); - struct xfs_inode *ip = iip->ili_inode; - uint nvecs; - size_t data_bytes; - xfs_mount_t *mp; - - vecp->i_addr = &iip->ili_format; - vecp->i_len = sizeof(xfs_inode_log_format_t); - vecp->i_type = XLOG_REG_TYPE_IFORMAT; - vecp++; - nvecs = 1; - - vecp->i_addr = &ip->i_d; - vecp->i_len = sizeof(struct xfs_icdinode); - vecp->i_type = XLOG_REG_TYPE_ICORE; - vecp++; - nvecs++; - - /* - * If this is really an old format inode, then we need to - * log it as such. This means that we have to copy the link - * count from the new field to the old. We don't have to worry - * about the new fields, because nothing trusts them as long as - * the old inode version number is there. If the superblock already - * has a new version number, then we don't bother converting back. - */ - mp = ip->i_mount; - ASSERT(ip->i_d.di_version == 1 || xfs_sb_version_hasnlink(&mp->m_sb)); - if (ip->i_d.di_version == 1) { - if (!xfs_sb_version_hasnlink(&mp->m_sb)) { - /* - * Convert it back. - */ - ASSERT(ip->i_d.di_nlink <= XFS_MAXLINK_1); - ip->i_d.di_onlink = ip->i_d.di_nlink; - } else { - /* - * The superblock version has already been bumped, - * so just make the conversion to the new inode - * format permanent. - */ - ip->i_d.di_version = 2; - ip->i_d.di_onlink = 0; - memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad)); - } - } - - switch (ip->i_d.di_format) { - case XFS_DINODE_FMT_EXTENTS: - iip->ili_fields &= - ~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT | - XFS_ILOG_DEV | XFS_ILOG_UUID); - - if ((iip->ili_fields & XFS_ILOG_DEXT) && - ip->i_d.di_nextents > 0 && - ip->i_df.if_bytes > 0) { - ASSERT(ip->i_df.if_u1.if_extents != NULL); - ASSERT(ip->i_df.if_bytes / sizeof(xfs_bmbt_rec_t) > 0); - ASSERT(iip->ili_extents_buf == NULL); - -#ifdef XFS_NATIVE_HOST - if (ip->i_d.di_nextents == ip->i_df.if_bytes / - (uint)sizeof(xfs_bmbt_rec_t)) { - /* - * There are no delayed allocation - * extents, so just point to the - * real extents array. - */ - vecp->i_addr = ip->i_df.if_u1.if_extents; - vecp->i_len = ip->i_df.if_bytes; - vecp->i_type = XLOG_REG_TYPE_IEXT; - } else -#endif - { - xfs_inode_item_format_extents(ip, vecp, - XFS_DATA_FORK, XLOG_REG_TYPE_IEXT); - } - ASSERT(vecp->i_len <= ip->i_df.if_bytes); - iip->ili_format.ilf_dsize = vecp->i_len; - vecp++; - nvecs++; - } else { - iip->ili_fields &= ~XFS_ILOG_DEXT; - } - break; - - case XFS_DINODE_FMT_BTREE: - iip->ili_fields &= - ~(XFS_ILOG_DDATA | XFS_ILOG_DEXT | - XFS_ILOG_DEV | XFS_ILOG_UUID); - - if ((iip->ili_fields & XFS_ILOG_DBROOT) && - ip->i_df.if_broot_bytes > 0) { - ASSERT(ip->i_df.if_broot != NULL); - vecp->i_addr = ip->i_df.if_broot; - vecp->i_len = ip->i_df.if_broot_bytes; - vecp->i_type = XLOG_REG_TYPE_IBROOT; - vecp++; - nvecs++; - iip->ili_format.ilf_dsize = ip->i_df.if_broot_bytes; - } else { - ASSERT(!(iip->ili_fields & - XFS_ILOG_DBROOT)); -#ifdef XFS_TRANS_DEBUG - if (iip->ili_root_size > 0) { - ASSERT(iip->ili_root_size == - ip->i_df.if_broot_bytes); - ASSERT(memcmp(iip->ili_orig_root, - ip->i_df.if_broot, - iip->ili_root_size) == 0); - } else { - ASSERT(ip->i_df.if_broot_bytes == 0); - } -#endif - iip->ili_fields &= ~XFS_ILOG_DBROOT; - } - break; - - case XFS_DINODE_FMT_LOCAL: - iip->ili_fields &= - ~(XFS_ILOG_DEXT | XFS_ILOG_DBROOT | - XFS_ILOG_DEV | XFS_ILOG_UUID); - if ((iip->ili_fields & XFS_ILOG_DDATA) && - ip->i_df.if_bytes > 0) { - ASSERT(ip->i_df.if_u1.if_data != NULL); - ASSERT(ip->i_d.di_size > 0); - - vecp->i_addr = ip->i_df.if_u1.if_data; - /* - * Round i_bytes up to a word boundary. - * The underlying memory is guaranteed to - * to be there by xfs_idata_realloc(). - */ - data_bytes = roundup(ip->i_df.if_bytes, 4); - ASSERT((ip->i_df.if_real_bytes == 0) || - (ip->i_df.if_real_bytes == data_bytes)); - vecp->i_len = (int)data_bytes; - vecp->i_type = XLOG_REG_TYPE_ILOCAL; - vecp++; - nvecs++; - iip->ili_format.ilf_dsize = (unsigned)data_bytes; - } else { - iip->ili_fields &= ~XFS_ILOG_DDATA; - } - break; - - case XFS_DINODE_FMT_DEV: - iip->ili_fields &= - ~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT | - XFS_ILOG_DEXT | XFS_ILOG_UUID); - if (iip->ili_fields & XFS_ILOG_DEV) { - iip->ili_format.ilf_u.ilfu_rdev = - ip->i_df.if_u2.if_rdev; - } - break; - - case XFS_DINODE_FMT_UUID: - iip->ili_fields &= - ~(XFS_ILOG_DDATA | XFS_ILOG_DBROOT | - XFS_ILOG_DEXT | XFS_ILOG_DEV); - if (iip->ili_fields & XFS_ILOG_UUID) { - iip->ili_format.ilf_u.ilfu_uuid = - ip->i_df.if_u2.if_uuid; - } - break; - - default: - ASSERT(0); - break; - } - - /* - * If there are no attributes associated with the file, then we're done. - */ - if (!XFS_IFORK_Q(ip)) { - iip->ili_fields &= - ~(XFS_ILOG_ADATA | XFS_ILOG_ABROOT | XFS_ILOG_AEXT); - goto out; - } - - switch (ip->i_d.di_aformat) { - case XFS_DINODE_FMT_EXTENTS: - iip->ili_fields &= - ~(XFS_ILOG_ADATA | XFS_ILOG_ABROOT); - - if ((iip->ili_fields & XFS_ILOG_AEXT) && - ip->i_d.di_anextents > 0 && - ip->i_afp->if_bytes > 0) { - ASSERT(ip->i_afp->if_bytes / sizeof(xfs_bmbt_rec_t) == - ip->i_d.di_anextents); - ASSERT(ip->i_afp->if_u1.if_extents != NULL); -#ifdef XFS_NATIVE_HOST - /* - * There are not delayed allocation extents - * for attributes, so just point at the array. - */ - vecp->i_addr = ip->i_afp->if_u1.if_extents; - vecp->i_len = ip->i_afp->if_bytes; - vecp->i_type = XLOG_REG_TYPE_IATTR_EXT; -#else - ASSERT(iip->ili_aextents_buf == NULL); - xfs_inode_item_format_extents(ip, vecp, - XFS_ATTR_FORK, XLOG_REG_TYPE_IATTR_EXT); -#endif - iip->ili_format.ilf_asize = vecp->i_len; - vecp++; - nvecs++; - } else { - iip->ili_fields &= ~XFS_ILOG_AEXT; - } - break; - - case XFS_DINODE_FMT_BTREE: - iip->ili_fields &= - ~(XFS_ILOG_ADATA | XFS_ILOG_AEXT); - - if ((iip->ili_fields & XFS_ILOG_ABROOT) && - ip->i_afp->if_broot_bytes > 0) { - ASSERT(ip->i_afp->if_broot != NULL); - - vecp->i_addr = ip->i_afp->if_broot; - vecp->i_len = ip->i_afp->if_broot_bytes; - vecp->i_type = XLOG_REG_TYPE_IATTR_BROOT; - vecp++; - nvecs++; - iip->ili_format.ilf_asize = ip->i_afp->if_broot_bytes; - } else { - iip->ili_fields &= ~XFS_ILOG_ABROOT; - } - break; - - case XFS_DINODE_FMT_LOCAL: - iip->ili_fields &= - ~(XFS_ILOG_AEXT | XFS_ILOG_ABROOT); - - if ((iip->ili_fields & XFS_ILOG_ADATA) && - ip->i_afp->if_bytes > 0) { - ASSERT(ip->i_afp->if_u1.if_data != NULL); - - vecp->i_addr = ip->i_afp->if_u1.if_data; - /* - * Round i_bytes up to a word boundary. - * The underlying memory is guaranteed to - * to be there by xfs_idata_realloc(). - */ - data_bytes = roundup(ip->i_afp->if_bytes, 4); - ASSERT((ip->i_afp->if_real_bytes == 0) || - (ip->i_afp->if_real_bytes == data_bytes)); - vecp->i_len = (int)data_bytes; - vecp->i_type = XLOG_REG_TYPE_IATTR_LOCAL; - vecp++; - nvecs++; - iip->ili_format.ilf_asize = (unsigned)data_bytes; - } else { - iip->ili_fields &= ~XFS_ILOG_ADATA; - } - break; - - default: - ASSERT(0); - break; - } - -out: - /* - * Now update the log format that goes out to disk from the in-core - * values. We always write the inode core to make the arithmetic - * games in recovery easier, which isn't a big deal as just about any - * transaction would dirty it anyway. - */ - iip->ili_format.ilf_fields = XFS_ILOG_CORE | - (iip->ili_fields & ~XFS_ILOG_TIMESTAMP); - iip->ili_format.ilf_size = nvecs; -} - - -/* - * This is called to pin the inode associated with the inode log - * item in memory so it cannot be written out. - */ -STATIC void -xfs_inode_item_pin( - struct xfs_log_item *lip) -{ - struct xfs_inode *ip = INODE_ITEM(lip)->ili_inode; - - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); - - trace_xfs_inode_pin(ip, _RET_IP_); - atomic_inc(&ip->i_pincount); -} - - -/* - * This is called to unpin the inode associated with the inode log - * item which was previously pinned with a call to xfs_inode_item_pin(). - * - * Also wake up anyone in xfs_iunpin_wait() if the count goes to 0. - */ -STATIC void -xfs_inode_item_unpin( - struct xfs_log_item *lip, - int remove) -{ - struct xfs_inode *ip = INODE_ITEM(lip)->ili_inode; - - trace_xfs_inode_unpin(ip, _RET_IP_); - ASSERT(atomic_read(&ip->i_pincount) > 0); - if (atomic_dec_and_test(&ip->i_pincount)) - wake_up_bit(&ip->i_flags, __XFS_IPINNED_BIT); -} - -/* - * This is called to attempt to lock the inode associated with this - * inode log item, in preparation for the push routine which does the actual - * iflush. Don't sleep on the inode lock or the flush lock. - * - * If the flush lock is already held, indicating that the inode has - * been or is in the process of being flushed, then (ideally) we'd like to - * see if the inode's buffer is still incore, and if so give it a nudge. - * We delay doing so until the pushbuf routine, though, to avoid holding - * the AIL lock across a call to the blackhole which is the buffer cache. - * Also we don't want to sleep in any device strategy routines, which can happen - * if we do the subsequent bawrite in here. - */ -STATIC uint -xfs_inode_item_trylock( - struct xfs_log_item *lip) -{ - struct xfs_inode_log_item *iip = INODE_ITEM(lip); - struct xfs_inode *ip = iip->ili_inode; - - if (xfs_ipincount(ip) > 0) - return XFS_ITEM_PINNED; - - if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED)) - return XFS_ITEM_LOCKED; - - if (!xfs_iflock_nowait(ip)) { - /* - * inode has already been flushed to the backing buffer, - * leave it locked in shared mode, pushbuf routine will - * unlock it. - */ - return XFS_ITEM_PUSHBUF; - } - - /* Stale items should force out the iclog */ - if (ip->i_flags & XFS_ISTALE) { - xfs_ifunlock(ip); - xfs_iunlock(ip, XFS_ILOCK_SHARED); - return XFS_ITEM_PINNED; - } - -#ifdef DEBUG - if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) { - ASSERT(iip->ili_fields != 0); - ASSERT(iip->ili_logged == 0); - ASSERT(lip->li_flags & XFS_LI_IN_AIL); - } -#endif - return XFS_ITEM_SUCCESS; -} - -/* - * Unlock the inode associated with the inode log item. - * Clear the fields of the inode and inode log item that - * are specific to the current transaction. If the - * hold flags is set, do not unlock the inode. - */ -STATIC void -xfs_inode_item_unlock( - struct xfs_log_item *lip) -{ - struct xfs_inode_log_item *iip = INODE_ITEM(lip); - struct xfs_inode *ip = iip->ili_inode; - unsigned short lock_flags; - - ASSERT(ip->i_itemp != NULL); - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); - - /* - * If the inode needed a separate buffer with which to log - * its extents, then free it now. - */ - if (iip->ili_extents_buf != NULL) { - ASSERT(ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS); - ASSERT(ip->i_d.di_nextents > 0); - ASSERT(iip->ili_fields & XFS_ILOG_DEXT); - ASSERT(ip->i_df.if_bytes > 0); - kmem_free(iip->ili_extents_buf); - iip->ili_extents_buf = NULL; - } - if (iip->ili_aextents_buf != NULL) { - ASSERT(ip->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS); - ASSERT(ip->i_d.di_anextents > 0); - ASSERT(iip->ili_fields & XFS_ILOG_AEXT); - ASSERT(ip->i_afp->if_bytes > 0); - kmem_free(iip->ili_aextents_buf); - iip->ili_aextents_buf = NULL; - } - - lock_flags = iip->ili_lock_flags; - iip->ili_lock_flags = 0; - if (lock_flags) - xfs_iunlock(ip, lock_flags); -} - -/* - * This is called to find out where the oldest active copy of the inode log - * item in the on disk log resides now that the last log write of it completed - * at the given lsn. Since we always re-log all dirty data in an inode, the - * latest copy in the on disk log is the only one that matters. Therefore, - * simply return the given lsn. - * - * If the inode has been marked stale because the cluster is being freed, we - * don't want to (re-)insert this inode into the AIL. There is a race condition - * where the cluster buffer may be unpinned before the inode is inserted into - * the AIL during transaction committed processing. If the buffer is unpinned - * before the inode item has been committed and inserted, then it is possible - * for the buffer to be written and IO completes before the inode is inserted - * into the AIL. In that case, we'd be inserting a clean, stale inode into the - * AIL which will never get removed. It will, however, get reclaimed which - * triggers an assert in xfs_inode_free() complaining about freein an inode - * still in the AIL. - * - * To avoid this, just unpin the inode directly and return a LSN of -1 so the - * transaction committed code knows that it does not need to do any further - * processing on the item. - */ -STATIC xfs_lsn_t -xfs_inode_item_committed( - struct xfs_log_item *lip, - xfs_lsn_t lsn) -{ - struct xfs_inode_log_item *iip = INODE_ITEM(lip); - struct xfs_inode *ip = iip->ili_inode; - - if (xfs_iflags_test(ip, XFS_ISTALE)) { - xfs_inode_item_unpin(lip, 0); - return -1; - } - return lsn; -} - -/* - * This gets called by xfs_trans_push_ail(), when IOP_TRYLOCK - * failed to get the inode flush lock but did get the inode locked SHARED. - * Here we're trying to see if the inode buffer is incore, and if so whether it's - * marked delayed write. If that's the case, we'll promote it and that will - * allow the caller to write the buffer by triggering the xfsbufd to run. - */ -STATIC bool -xfs_inode_item_pushbuf( - struct xfs_log_item *lip) -{ - struct xfs_inode_log_item *iip = INODE_ITEM(lip); - struct xfs_inode *ip = iip->ili_inode; - struct xfs_buf *bp; - bool ret = true; - - ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED)); - - /* - * If a flush is not in progress anymore, chances are that the - * inode was taken off the AIL. So, just get out. - */ - if (!xfs_isiflocked(ip) || - !(lip->li_flags & XFS_LI_IN_AIL)) { - xfs_iunlock(ip, XFS_ILOCK_SHARED); - return true; - } - - bp = xfs_incore(ip->i_mount->m_ddev_targp, iip->ili_format.ilf_blkno, - iip->ili_format.ilf_len, XBF_TRYLOCK); - - xfs_iunlock(ip, XFS_ILOCK_SHARED); - if (!bp) - return true; - if (XFS_BUF_ISDELAYWRITE(bp)) - xfs_buf_delwri_promote(bp); - if (xfs_buf_ispinned(bp)) - ret = false; - xfs_buf_relse(bp); - return ret; -} - -/* - * This is called to asynchronously write the inode associated with this - * inode log item out to disk. The inode will already have been locked by - * a successful call to xfs_inode_item_trylock(). - */ -STATIC void -xfs_inode_item_push( - struct xfs_log_item *lip) -{ - struct xfs_inode_log_item *iip = INODE_ITEM(lip); - struct xfs_inode *ip = iip->ili_inode; - - ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED)); - ASSERT(xfs_isiflocked(ip)); - - /* - * Since we were able to lock the inode's flush lock and - * we found it on the AIL, the inode must be dirty. This - * is because the inode is removed from the AIL while still - * holding the flush lock in xfs_iflush_done(). Thus, if - * we found it in the AIL and were able to obtain the flush - * lock without sleeping, then there must not have been - * anyone in the process of flushing the inode. - */ - ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || iip->ili_fields != 0); - - /* - * Push the inode to it's backing buffer. This will not remove the - * inode from the AIL - a further push will be required to trigger a - * buffer push. However, this allows all the dirty inodes to be pushed - * to the buffer before it is pushed to disk. The buffer IO completion - * will pull the inode from the AIL, mark it clean and unlock the flush - * lock. - */ - (void) xfs_iflush(ip, SYNC_TRYLOCK); - xfs_iunlock(ip, XFS_ILOCK_SHARED); -} - -/* - * XXX rcc - this one really has to do something. Probably needs - * to stamp in a new field in the incore inode. - */ -STATIC void -xfs_inode_item_committing( - struct xfs_log_item *lip, - xfs_lsn_t lsn) -{ - INODE_ITEM(lip)->ili_last_lsn = lsn; -} - -/* - * This is the ops vector shared by all buf log items. - */ -static const struct xfs_item_ops xfs_inode_item_ops = { - .iop_size = xfs_inode_item_size, - .iop_format = xfs_inode_item_format, - .iop_pin = xfs_inode_item_pin, - .iop_unpin = xfs_inode_item_unpin, - .iop_trylock = xfs_inode_item_trylock, - .iop_unlock = xfs_inode_item_unlock, - .iop_committed = xfs_inode_item_committed, - .iop_push = xfs_inode_item_push, - .iop_pushbuf = xfs_inode_item_pushbuf, - .iop_committing = xfs_inode_item_committing -}; - - -/* - * Initialize the inode log item for a newly allocated (in-core) inode. - */ -void -xfs_inode_item_init( - struct xfs_inode *ip, - struct xfs_mount *mp) -{ - struct xfs_inode_log_item *iip; - - ASSERT(ip->i_itemp == NULL); - iip = ip->i_itemp = kmem_zone_zalloc(xfs_ili_zone, KM_SLEEP); - - iip->ili_inode = ip; - xfs_log_item_init(mp, &iip->ili_item, XFS_LI_INODE, - &xfs_inode_item_ops); - iip->ili_format.ilf_type = XFS_LI_INODE; - iip->ili_format.ilf_ino = ip->i_ino; - iip->ili_format.ilf_blkno = ip->i_imap.im_blkno; - iip->ili_format.ilf_len = ip->i_imap.im_len; - iip->ili_format.ilf_boffset = ip->i_imap.im_boffset; -} - -/* - * Free the inode log item and any memory hanging off of it. - */ -void -xfs_inode_item_destroy( - xfs_inode_t *ip) -{ -#ifdef XFS_TRANS_DEBUG - if (ip->i_itemp->ili_root_size != 0) { - kmem_free(ip->i_itemp->ili_orig_root); - } -#endif - kmem_zone_free(xfs_ili_zone, ip->i_itemp); -} - - -/* - * This is the inode flushing I/O completion routine. It is called - * from interrupt level when the buffer containing the inode is - * flushed to disk. It is responsible for removing the inode item - * from the AIL if it has not been re-logged, and unlocking the inode's - * flush lock. - * - * To reduce AIL lock traffic as much as possible, we scan the buffer log item - * list for other inodes that will run this function. We remove them from the - * buffer list so we can process all the inode IO completions in one AIL lock - * traversal. - */ -void -xfs_iflush_done( - struct xfs_buf *bp, - struct xfs_log_item *lip) -{ - struct xfs_inode_log_item *iip; - struct xfs_log_item *blip; - struct xfs_log_item *next; - struct xfs_log_item *prev; - struct xfs_ail *ailp = lip->li_ailp; - int need_ail = 0; - - /* - * Scan the buffer IO completions for other inodes being completed and - * attach them to the current inode log item. - */ - blip = bp->b_fspriv; - prev = NULL; - while (blip != NULL) { - if (lip->li_cb != xfs_iflush_done) { - prev = blip; - blip = blip->li_bio_list; - continue; - } - - /* remove from list */ - next = blip->li_bio_list; - if (!prev) { - bp->b_fspriv = next; - } else { - prev->li_bio_list = next; - } - - /* add to current list */ - blip->li_bio_list = lip->li_bio_list; - lip->li_bio_list = blip; - - /* - * while we have the item, do the unlocked check for needing - * the AIL lock. - */ - iip = INODE_ITEM(blip); - if (iip->ili_logged && blip->li_lsn == iip->ili_flush_lsn) - need_ail++; - - blip = next; - } - - /* make sure we capture the state of the initial inode. */ - iip = INODE_ITEM(lip); - if (iip->ili_logged && lip->li_lsn == iip->ili_flush_lsn) - need_ail++; - - /* - * We only want to pull the item from the AIL if it is - * actually there and its location in the log has not - * changed since we started the flush. Thus, we only bother - * if the ili_logged flag is set and the inode's lsn has not - * changed. First we check the lsn outside - * the lock since it's cheaper, and then we recheck while - * holding the lock before removing the inode from the AIL. - */ - if (need_ail) { - struct xfs_log_item *log_items[need_ail]; - int i = 0; - spin_lock(&ailp->xa_lock); - for (blip = lip; blip; blip = blip->li_bio_list) { - iip = INODE_ITEM(blip); - if (iip->ili_logged && - blip->li_lsn == iip->ili_flush_lsn) { - log_items[i++] = blip; - } - ASSERT(i <= need_ail); - } - /* xfs_trans_ail_delete_bulk() drops the AIL lock. */ - xfs_trans_ail_delete_bulk(ailp, log_items, i); - } - - - /* - * clean up and unlock the flush lock now we are done. We can clear the - * ili_last_fields bits now that we know that the data corresponding to - * them is safely on disk. - */ - for (blip = lip; blip; blip = next) { - next = blip->li_bio_list; - blip->li_bio_list = NULL; - - iip = INODE_ITEM(blip); - iip->ili_logged = 0; - iip->ili_last_fields = 0; - xfs_ifunlock(iip->ili_inode); - } -} - -/* - * This is the inode flushing abort routine. It is called - * from xfs_iflush when the filesystem is shutting down to clean - * up the inode state. - * It is responsible for removing the inode item - * from the AIL if it has not been re-logged, and unlocking the inode's - * flush lock. - */ -void -xfs_iflush_abort( - xfs_inode_t *ip) -{ - xfs_inode_log_item_t *iip = ip->i_itemp; - - if (iip) { - struct xfs_ail *ailp = iip->ili_item.li_ailp; - if (iip->ili_item.li_flags & XFS_LI_IN_AIL) { - spin_lock(&ailp->xa_lock); - if (iip->ili_item.li_flags & XFS_LI_IN_AIL) { - /* xfs_trans_ail_delete() drops the AIL lock. */ - xfs_trans_ail_delete(ailp, (xfs_log_item_t *)iip); - } else - spin_unlock(&ailp->xa_lock); - } - iip->ili_logged = 0; - /* - * Clear the ili_last_fields bits now that we know that the - * data corresponding to them is safely on disk. - */ - iip->ili_last_fields = 0; - /* - * Clear the inode logging fields so no more flushes are - * attempted. - */ - iip->ili_fields = 0; - } - /* - * Release the inode's flush lock since we're done with it. - */ - xfs_ifunlock(ip); -} - -void -xfs_istale_done( - struct xfs_buf *bp, - struct xfs_log_item *lip) -{ - xfs_iflush_abort(INODE_ITEM(lip)->ili_inode); -} - -/* - * convert an xfs_inode_log_format struct from either 32 or 64 bit versions - * (which can have different field alignments) to the native version - */ -int -xfs_inode_item_format_convert( - xfs_log_iovec_t *buf, - xfs_inode_log_format_t *in_f) -{ - if (buf->i_len == sizeof(xfs_inode_log_format_32_t)) { - xfs_inode_log_format_32_t *in_f32 = buf->i_addr; - - in_f->ilf_type = in_f32->ilf_type; - in_f->ilf_size = in_f32->ilf_size; - in_f->ilf_fields = in_f32->ilf_fields; - in_f->ilf_asize = in_f32->ilf_asize; - in_f->ilf_dsize = in_f32->ilf_dsize; - in_f->ilf_ino = in_f32->ilf_ino; - /* copy biggest field of ilf_u */ - memcpy(in_f->ilf_u.ilfu_uuid.__u_bits, - in_f32->ilf_u.ilfu_uuid.__u_bits, - sizeof(uuid_t)); - in_f->ilf_blkno = in_f32->ilf_blkno; - in_f->ilf_len = in_f32->ilf_len; - in_f->ilf_boffset = in_f32->ilf_boffset; - return 0; - } else if (buf->i_len == sizeof(xfs_inode_log_format_64_t)){ - xfs_inode_log_format_64_t *in_f64 = buf->i_addr; - - in_f->ilf_type = in_f64->ilf_type; - in_f->ilf_size = in_f64->ilf_size; - in_f->ilf_fields = in_f64->ilf_fields; - in_f->ilf_asize = in_f64->ilf_asize; - in_f->ilf_dsize = in_f64->ilf_dsize; - in_f->ilf_ino = in_f64->ilf_ino; - /* copy biggest field of ilf_u */ - memcpy(in_f->ilf_u.ilfu_uuid.__u_bits, - in_f64->ilf_u.ilfu_uuid.__u_bits, - sizeof(uuid_t)); - in_f->ilf_blkno = in_f64->ilf_blkno; - in_f->ilf_len = in_f64->ilf_len; - in_f->ilf_boffset = in_f64->ilf_boffset; - return 0; - } - return EFSCORRUPTED; -} |