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fs/ntfs/mft.c
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// SPDX-License-Identifier: GPL-2.0-or-later |
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/** * mft.c - NTFS kernel mft record operations. Part of the Linux-NTFS project. * |
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* Copyright (c) 2001-2012 Anton Altaparmakov and Tuxera Inc. |
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* Copyright (c) 2002 Richard Russon |
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*/ #include <linux/buffer_head.h> |
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#include <linux/slab.h> |
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#include <linux/swap.h> |
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#include <linux/bio.h> |
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#include "attrib.h" #include "aops.h" #include "bitmap.h" #include "debug.h" #include "dir.h" #include "lcnalloc.h" #include "malloc.h" #include "mft.h" #include "ntfs.h" |
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#define MAX_BHS (PAGE_SIZE / NTFS_BLOCK_SIZE) |
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/** * map_mft_record_page - map the page in which a specific mft record resides * @ni: ntfs inode whose mft record page to map * * This maps the page in which the mft record of the ntfs inode @ni is situated * and returns a pointer to the mft record within the mapped page. * * Return value needs to be checked with IS_ERR() and if that is true PTR_ERR() * contains the negative error code returned. */ static inline MFT_RECORD *map_mft_record_page(ntfs_inode *ni) { |
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loff_t i_size; |
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ntfs_volume *vol = ni->vol; struct inode *mft_vi = vol->mft_ino; struct page *page; |
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unsigned long index, end_index; unsigned ofs; |
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BUG_ON(ni->page); /* * The index into the page cache and the offset within the page cache * page of the wanted mft record. FIXME: We need to check for * overflowing the unsigned long, but I don't think we would ever get * here if the volume was that big... */ |
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index = (u64)ni->mft_no << vol->mft_record_size_bits >> |
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PAGE_SHIFT; ofs = (ni->mft_no << vol->mft_record_size_bits) & ~PAGE_MASK; |
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i_size = i_size_read(mft_vi); |
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/* The maximum valid index into the page cache for $MFT's data. */ |
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end_index = i_size >> PAGE_SHIFT; |
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/* If the wanted index is out of bounds the mft record doesn't exist. */ if (unlikely(index >= end_index)) { |
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if (index > end_index || (i_size & ~PAGE_MASK) < ofs + |
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vol->mft_record_size) { |
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page = ERR_PTR(-ENOENT); |
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ntfs_error(vol->sb, "Attempt to read mft record 0x%lx, " |
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"which is beyond the end of the mft. " "This is probably a bug in the ntfs " "driver.", ni->mft_no); goto err_out; } } /* Read, map, and pin the page. */ page = ntfs_map_page(mft_vi->i_mapping, index); |
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if (!IS_ERR(page)) { |
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/* Catch multi sector transfer fixup errors. */ if (likely(ntfs_is_mft_recordp((le32*)(page_address(page) + ofs)))) { ni->page = page; ni->page_ofs = ofs; return page_address(page) + ofs; } ntfs_error(vol->sb, "Mft record 0x%lx is corrupt. " "Run chkdsk.", ni->mft_no); ntfs_unmap_page(page); page = ERR_PTR(-EIO); |
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NVolSetErrors(vol); |
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} err_out: ni->page = NULL; ni->page_ofs = 0; return (void*)page; } /** * map_mft_record - map, pin and lock an mft record * @ni: ntfs inode whose MFT record to map * |
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* First, take the mrec_lock mutex. We might now be sleeping, while waiting * for the mutex if it was already locked by someone else. |
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* * The page of the record is mapped using map_mft_record_page() before being * returned to the caller. * * This in turn uses ntfs_map_page() to get the page containing the wanted mft * record (it in turn calls read_cache_page() which reads it in from disk if * necessary, increments the use count on the page so that it cannot disappear * under us and returns a reference to the page cache page). * * If read_cache_page() invokes ntfs_readpage() to load the page from disk, it * sets PG_locked and clears PG_uptodate on the page. Once I/O has completed * and the post-read mst fixups on each mft record in the page have been * performed, the page gets PG_uptodate set and PG_locked cleared (this is done * in our asynchronous I/O completion handler end_buffer_read_mft_async()). * ntfs_map_page() waits for PG_locked to become clear and checks if * PG_uptodate is set and returns an error code if not. This provides * sufficient protection against races when reading/using the page. * * However there is the write mapping to think about. Doing the above described * checking here will be fine, because when initiating the write we will set * PG_locked and clear PG_uptodate making sure nobody is touching the page * contents. Doing the locking this way means that the commit to disk code in * the page cache code paths is automatically sufficiently locked with us as * we will not touch a page that has been locked or is not uptodate. The only * locking problem then is them locking the page while we are accessing it. * * So that code will end up having to own the mrec_lock of all mft * records/inodes present in the page before I/O can proceed. In that case we * wouldn't need to bother with PG_locked and PG_uptodate as nobody will be |
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* accessing anything without owning the mrec_lock mutex. But we do need to * use them because of the read_cache_page() invocation and the code becomes so * much simpler this way that it is well worth it. |
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* * The mft record is now ours and we return a pointer to it. You need to check * the returned pointer with IS_ERR() and if that is true, PTR_ERR() will return * the error code. * * NOTE: Caller is responsible for setting the mft record dirty before calling * unmap_mft_record(). This is obviously only necessary if the caller really * modified the mft record... * Q: Do we want to recycle one of the VFS inode state bits instead? * A: No, the inode ones mean we want to change the mft record, not we want to * write it out. */ MFT_RECORD *map_mft_record(ntfs_inode *ni) { MFT_RECORD *m; ntfs_debug("Entering for mft_no 0x%lx.", ni->mft_no); /* Make sure the ntfs inode doesn't go away. */ atomic_inc(&ni->count); /* Serialize access to this mft record. */ |
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mutex_lock(&ni->mrec_lock); |
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m = map_mft_record_page(ni); |
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if (!IS_ERR(m)) |
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return m; |
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mutex_unlock(&ni->mrec_lock); |
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atomic_dec(&ni->count); ntfs_error(ni->vol->sb, "Failed with error code %lu.", -PTR_ERR(m)); return m; } /** * unmap_mft_record_page - unmap the page in which a specific mft record resides * @ni: ntfs inode whose mft record page to unmap * * This unmaps the page in which the mft record of the ntfs inode @ni is * situated and returns. This is a NOOP if highmem is not configured. * * The unmap happens via ntfs_unmap_page() which in turn decrements the use * count on the page thus releasing it from the pinned state. * * We do not actually unmap the page from memory of course, as that will be * done by the page cache code itself when memory pressure increases or * whatever. */ static inline void unmap_mft_record_page(ntfs_inode *ni) { BUG_ON(!ni->page); // TODO: If dirty, blah... ntfs_unmap_page(ni->page); ni->page = NULL; ni->page_ofs = 0; return; } /** * unmap_mft_record - release a mapped mft record * @ni: ntfs inode whose MFT record to unmap * * We release the page mapping and the mrec_lock mutex which unmaps the mft * record and releases it for others to get hold of. We also release the ntfs * inode by decrementing the ntfs inode reference count. * * NOTE: If caller has modified the mft record, it is imperative to set the mft * record dirty BEFORE calling unmap_mft_record(). */ void unmap_mft_record(ntfs_inode *ni) { struct page *page = ni->page; BUG_ON(!page); ntfs_debug("Entering for mft_no 0x%lx.", ni->mft_no); unmap_mft_record_page(ni); |
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mutex_unlock(&ni->mrec_lock); |
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atomic_dec(&ni->count); /* * If pure ntfs_inode, i.e. no vfs inode attached, we leave it to * ntfs_clear_extent_inode() in the extent inode case, and to the * caller in the non-extent, yet pure ntfs inode case, to do the actual * tear down of all structures and freeing of all allocated memory. */ return; } /** * map_extent_mft_record - load an extent inode and attach it to its base * @base_ni: base ntfs inode * @mref: mft reference of the extent inode to load * @ntfs_ino: on successful return, pointer to the ntfs_inode structure * * Load the extent mft record @mref and attach it to its base inode @base_ni. * Return the mapped extent mft record if IS_ERR(result) is false. Otherwise * PTR_ERR(result) gives the negative error code. * * On successful return, @ntfs_ino contains a pointer to the ntfs_inode * structure of the mapped extent inode. */ MFT_RECORD *map_extent_mft_record(ntfs_inode *base_ni, MFT_REF mref, ntfs_inode **ntfs_ino) { MFT_RECORD *m; ntfs_inode *ni = NULL; ntfs_inode **extent_nis = NULL; int i; unsigned long mft_no = MREF(mref); u16 seq_no = MSEQNO(mref); |
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bool destroy_ni = false; |
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ntfs_debug("Mapping extent mft record 0x%lx (base mft record 0x%lx).", mft_no, base_ni->mft_no); /* Make sure the base ntfs inode doesn't go away. */ atomic_inc(&base_ni->count); /* * Check if this extent inode has already been added to the base inode, * in which case just return it. If not found, add it to the base * inode before returning it. */ |
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mutex_lock(&base_ni->extent_lock); |
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if (base_ni->nr_extents > 0) { extent_nis = base_ni->ext.extent_ntfs_inos; for (i = 0; i < base_ni->nr_extents; i++) { if (mft_no != extent_nis[i]->mft_no) continue; ni = extent_nis[i]; /* Make sure the ntfs inode doesn't go away. */ atomic_inc(&ni->count); break; } } if (likely(ni != NULL)) { |
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mutex_unlock(&base_ni->extent_lock); |
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atomic_dec(&base_ni->count); /* We found the record; just have to map and return it. */ m = map_mft_record(ni); /* map_mft_record() has incremented this on success. */ atomic_dec(&ni->count); |
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if (!IS_ERR(m)) { |
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/* Verify the sequence number. */ if (likely(le16_to_cpu(m->sequence_number) == seq_no)) { ntfs_debug("Done 1."); *ntfs_ino = ni; return m; } unmap_mft_record(ni); ntfs_error(base_ni->vol->sb, "Found stale extent mft " |
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"reference! Corrupt filesystem. " |
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"Run chkdsk."); return ERR_PTR(-EIO); } map_err_out: ntfs_error(base_ni->vol->sb, "Failed to map extent " "mft record, error code %ld.", -PTR_ERR(m)); return m; } /* Record wasn't there. Get a new ntfs inode and initialize it. */ ni = ntfs_new_extent_inode(base_ni->vol->sb, mft_no); if (unlikely(!ni)) { |
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mutex_unlock(&base_ni->extent_lock); |
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atomic_dec(&base_ni->count); return ERR_PTR(-ENOMEM); } ni->vol = base_ni->vol; ni->seq_no = seq_no; ni->nr_extents = -1; ni->ext.base_ntfs_ino = base_ni; /* Now map the record. */ m = map_mft_record(ni); if (IS_ERR(m)) { |
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mutex_unlock(&base_ni->extent_lock); |
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atomic_dec(&base_ni->count); ntfs_clear_extent_inode(ni); goto map_err_out; } /* Verify the sequence number if it is present. */ if (seq_no && (le16_to_cpu(m->sequence_number) != seq_no)) { ntfs_error(base_ni->vol->sb, "Found stale extent mft " |
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"reference! Corrupt filesystem. Run chkdsk."); |
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destroy_ni = true; |
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m = ERR_PTR(-EIO); goto unm_err_out; } /* Attach extent inode to base inode, reallocating memory if needed. */ if (!(base_ni->nr_extents & 3)) { ntfs_inode **tmp; int new_size = (base_ni->nr_extents + 4) * sizeof(ntfs_inode *); |
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tmp = kmalloc(new_size, GFP_NOFS); |
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if (unlikely(!tmp)) { ntfs_error(base_ni->vol->sb, "Failed to allocate " "internal buffer."); |
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destroy_ni = true; |
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m = ERR_PTR(-ENOMEM); goto unm_err_out; } if (base_ni->nr_extents) { BUG_ON(!base_ni->ext.extent_ntfs_inos); memcpy(tmp, base_ni->ext.extent_ntfs_inos, new_size - 4 * sizeof(ntfs_inode *)); kfree(base_ni->ext.extent_ntfs_inos); } base_ni->ext.extent_ntfs_inos = tmp; } base_ni->ext.extent_ntfs_inos[base_ni->nr_extents++] = ni; |
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mutex_unlock(&base_ni->extent_lock); |
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atomic_dec(&base_ni->count); ntfs_debug("Done 2."); *ntfs_ino = ni; return m; unm_err_out: unmap_mft_record(ni); |
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mutex_unlock(&base_ni->extent_lock); |
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atomic_dec(&base_ni->count); /* * If the extent inode was not attached to the base inode we need to * release it or we will leak memory. */ if (destroy_ni) ntfs_clear_extent_inode(ni); return m; } #ifdef NTFS_RW /** * __mark_mft_record_dirty - set the mft record and the page containing it dirty * @ni: ntfs inode describing the mapped mft record * * Internal function. Users should call mark_mft_record_dirty() instead. * * Set the mapped (extent) mft record of the (base or extent) ntfs inode @ni, * as well as the page containing the mft record, dirty. Also, mark the base * vfs inode dirty. This ensures that any changes to the mft record are * written out to disk. * |
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* NOTE: We only set I_DIRTY_DATASYNC (and not I_DIRTY_PAGES) |
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* on the base vfs inode, because even though file data may have been modified, * it is dirty in the inode meta data rather than the data page cache of the * inode, and thus there are no data pages that need writing out. Therefore, a * full mark_inode_dirty() is overkill. A mark_inode_dirty_sync(), on the |
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* other hand, is not sufficient, because ->write_inode needs to be called even * in case of fdatasync. This needs to happen or the file data would not * necessarily hit the device synchronously, even though the vfs inode has the * O_SYNC flag set. Also, I_DIRTY_DATASYNC simply "feels" better than just * I_DIRTY_SYNC, since the file data has not actually hit the block device yet, * which is not what I_DIRTY_SYNC on its own would suggest. |
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*/ void __mark_mft_record_dirty(ntfs_inode *ni) { ntfs_inode *base_ni; ntfs_debug("Entering for inode 0x%lx.", ni->mft_no); BUG_ON(NInoAttr(ni)); mark_ntfs_record_dirty(ni->page, ni->page_ofs); /* Determine the base vfs inode and mark it dirty, too. */ |
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mutex_lock(&ni->extent_lock); |
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if (likely(ni->nr_extents >= 0)) base_ni = ni; else base_ni = ni->ext.base_ntfs_ino; |
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mutex_unlock(&ni->extent_lock); |
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__mark_inode_dirty(VFS_I(base_ni), I_DIRTY_DATASYNC); |
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} static const char *ntfs_please_email = "Please email " "linux-ntfs-dev@lists.sourceforge.net and say that you saw " "this message. Thank you."; /** * ntfs_sync_mft_mirror_umount - synchronise an mft record to the mft mirror * @vol: ntfs volume on which the mft record to synchronize resides * @mft_no: mft record number of mft record to synchronize * @m: mapped, mst protected (extent) mft record to synchronize * * Write the mapped, mst protected (extent) mft record @m with mft record * number @mft_no to the mft mirror ($MFTMirr) of the ntfs volume @vol, * bypassing the page cache and the $MFTMirr inode itself. * * This function is only for use at umount time when the mft mirror inode has * already been disposed off. We BUG() if we are called while the mft mirror * inode is still attached to the volume. * * On success return 0. On error return -errno. * * NOTE: This function is not implemented yet as I am not convinced it can * actually be triggered considering the sequence of commits we do in super.c:: * ntfs_put_super(). But just in case we provide this place holder as the * alternative would be either to BUG() or to get a NULL pointer dereference * and Oops. */ static int ntfs_sync_mft_mirror_umount(ntfs_volume *vol, const unsigned long mft_no, MFT_RECORD *m) { BUG_ON(vol->mftmirr_ino); ntfs_error(vol->sb, "Umount time mft mirror syncing is not " "implemented yet. %s", ntfs_please_email); return -EOPNOTSUPP; } /** * ntfs_sync_mft_mirror - synchronize an mft record to the mft mirror * @vol: ntfs volume on which the mft record to synchronize resides * @mft_no: mft record number of mft record to synchronize * @m: mapped, mst protected (extent) mft record to synchronize * @sync: if true, wait for i/o completion * * Write the mapped, mst protected (extent) mft record @m with mft record * number @mft_no to the mft mirror ($MFTMirr) of the ntfs volume @vol. * * On success return 0. On error return -errno and set the volume errors flag * in the ntfs volume @vol. * * NOTE: We always perform synchronous i/o and ignore the @sync parameter. * * TODO: If @sync is false, want to do truly asynchronous i/o, i.e. just * schedule i/o via ->writepage or do it via kntfsd or whatever. */ int ntfs_sync_mft_mirror(ntfs_volume *vol, const unsigned long mft_no, MFT_RECORD *m, int sync) { struct page *page; unsigned int blocksize = vol->sb->s_blocksize; int max_bhs = vol->mft_record_size / blocksize; |
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struct buffer_head *bhs[MAX_BHS]; |
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struct buffer_head *bh, *head; u8 *kmirr; runlist_element *rl; unsigned int block_start, block_end, m_start, m_end, page_ofs; int i_bhs, nr_bhs, err = 0; |
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unsigned char blocksize_bits = vol->sb->s_blocksize_bits; |
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ntfs_debug("Entering for inode 0x%lx.", mft_no); BUG_ON(!max_bhs); |
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if (WARN_ON(max_bhs > MAX_BHS)) return -EINVAL; |
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if (unlikely(!vol->mftmirr_ino)) { /* This could happen during umount... */ err = ntfs_sync_mft_mirror_umount(vol, mft_no, m); if (likely(!err)) return err; goto err_out; } /* Get the page containing the mirror copy of the mft record @m. */ page = ntfs_map_page(vol->mftmirr_ino->i_mapping, mft_no >> |
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(PAGE_SHIFT - vol->mft_record_size_bits)); |
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if (IS_ERR(page)) { ntfs_error(vol->sb, "Failed to map mft mirror page."); err = PTR_ERR(page); goto err_out; } lock_page(page); BUG_ON(!PageUptodate(page)); ClearPageUptodate(page); /* Offset of the mft mirror record inside the page. */ |
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page_ofs = (mft_no << vol->mft_record_size_bits) & ~PAGE_MASK; |
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/* The address in the page of the mirror copy of the mft record @m. */ kmirr = page_address(page) + page_ofs; /* Copy the mst protected mft record to the mirror. */ memcpy(kmirr, m, vol->mft_record_size); /* Create uptodate buffers if not present. */ if (unlikely(!page_has_buffers(page))) { struct buffer_head *tail; |
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bh = head = alloc_page_buffers(page, blocksize, true); |
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do { set_buffer_uptodate(bh); tail = bh; bh = bh->b_this_page; } while (bh); tail->b_this_page = head; attach_page_buffers(page, head); |
1da177e4c Linux-2.6.12-rc2 |
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} bh = head = page_buffers(page); BUG_ON(!bh); rl = NULL; nr_bhs = 0; block_start = 0; m_start = kmirr - (u8*)page_address(page); m_end = m_start + vol->mft_record_size; do { block_end = block_start + blocksize; /* If the buffer is outside the mft record, skip it. */ if (block_end <= m_start) continue; if (unlikely(block_start >= m_end)) break; /* Need to map the buffer if it is not mapped already. */ if (unlikely(!buffer_mapped(bh))) { VCN vcn; LCN lcn; unsigned int vcn_ofs; |
e74589ac2 NTFS: Fix bug in ... |
523 |
bh->b_bdev = vol->sb->s_bdev; |
1da177e4c Linux-2.6.12-rc2 |
524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 |
/* Obtain the vcn and offset of the current block. */ vcn = ((VCN)mft_no << vol->mft_record_size_bits) + (block_start - m_start); vcn_ofs = vcn & vol->cluster_size_mask; vcn >>= vol->cluster_size_bits; if (!rl) { down_read(&NTFS_I(vol->mftmirr_ino)-> runlist.lock); rl = NTFS_I(vol->mftmirr_ino)->runlist.rl; /* * $MFTMirr always has the whole of its runlist * in memory. */ BUG_ON(!rl); } /* Seek to element containing target vcn. */ while (rl->length && rl[1].vcn <= vcn) rl++; lcn = ntfs_rl_vcn_to_lcn(rl, vcn); /* For $MFTMirr, only lcn >= 0 is a successful remap. */ if (likely(lcn >= 0)) { /* Setup buffer head to correct block. */ bh->b_blocknr = ((lcn << vol->cluster_size_bits) + vcn_ofs) >> blocksize_bits; set_buffer_mapped(bh); } else { bh->b_blocknr = -1; ntfs_error(vol->sb, "Cannot write mft mirror " "record 0x%lx because its " "location on disk could not " "be determined (error code " "%lli).", mft_no, (long long)lcn); err = -EIO; } } BUG_ON(!buffer_uptodate(bh)); BUG_ON(!nr_bhs && (m_start != block_start)); BUG_ON(nr_bhs >= max_bhs); bhs[nr_bhs++] = bh; BUG_ON((nr_bhs >= max_bhs) && (m_end != block_end)); } while (block_start = block_end, (bh = bh->b_this_page) != head); if (unlikely(rl)) up_read(&NTFS_I(vol->mftmirr_ino)->runlist.lock); if (likely(!err)) { /* Lock buffers and start synchronous write i/o on them. */ for (i_bhs = 0; i_bhs < nr_bhs; i_bhs++) { struct buffer_head *tbh = bhs[i_bhs]; |
ca5de404f fs: rename buffer... |
573 |
if (!trylock_buffer(tbh)) |
1da177e4c Linux-2.6.12-rc2 |
574 575 576 577 578 |
BUG(); BUG_ON(!buffer_uptodate(tbh)); clear_buffer_dirty(tbh); get_bh(tbh); tbh->b_end_io = end_buffer_write_sync; |
2a222ca99 fs: have submit_b... |
579 |
submit_bh(REQ_OP_WRITE, 0, tbh); |
1da177e4c Linux-2.6.12-rc2 |
580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 |
} /* Wait on i/o completion of buffers. */ for (i_bhs = 0; i_bhs < nr_bhs; i_bhs++) { struct buffer_head *tbh = bhs[i_bhs]; wait_on_buffer(tbh); if (unlikely(!buffer_uptodate(tbh))) { err = -EIO; /* * Set the buffer uptodate so the page and * buffer states do not become out of sync. */ set_buffer_uptodate(tbh); } } } else /* if (unlikely(err)) */ { /* Clean the buffers. */ for (i_bhs = 0; i_bhs < nr_bhs; i_bhs++) clear_buffer_dirty(bhs[i_bhs]); } /* Current state: all buffers are clean, unlocked, and uptodate. */ /* Remove the mst protection fixups again. */ post_write_mst_fixup((NTFS_RECORD*)kmirr); flush_dcache_page(page); SetPageUptodate(page); unlock_page(page); ntfs_unmap_page(page); if (likely(!err)) { ntfs_debug("Done."); } else { ntfs_error(vol->sb, "I/O error while writing mft mirror " "record 0x%lx!", mft_no); err_out: ntfs_error(vol->sb, "Failed to synchronize $MFTMirr (error " "code %i). Volume will be left marked dirty " "on umount. Run ntfsfix on the partition " "after umounting to correct this.", -err); NVolSetErrors(vol); } return err; } /** * write_mft_record_nolock - write out a mapped (extent) mft record * @ni: ntfs inode describing the mapped (extent) mft record * @m: mapped (extent) mft record to write * @sync: if true, wait for i/o completion * * Write the mapped (extent) mft record @m described by the (regular or extent) * ntfs inode @ni to backing store. If the mft record @m has a counterpart in * the mft mirror, that is also updated. * * We only write the mft record if the ntfs inode @ni is dirty and the first * buffer belonging to its mft record is dirty, too. We ignore the dirty state * of subsequent buffers because we could have raced with * fs/ntfs/aops.c::mark_ntfs_record_dirty(). * * On success, clean the mft record and return 0. On error, leave the mft |
a778f2173 NTFS: Fix a bug i... |
638 |
* record dirty and return -errno. |
1da177e4c Linux-2.6.12-rc2 |
639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 |
* * NOTE: We always perform synchronous i/o and ignore the @sync parameter. * However, if the mft record has a counterpart in the mft mirror and @sync is * true, we write the mft record, wait for i/o completion, and only then write * the mft mirror copy. This ensures that if the system crashes either the mft * or the mft mirror will contain a self-consistent mft record @m. If @sync is * false on the other hand, we start i/o on both and then wait for completion * on them. This provides a speedup but no longer guarantees that you will end * up with a self-consistent mft record in the case of a crash but if you asked * for asynchronous writing you probably do not care about that anyway. * * TODO: If @sync is false, want to do truly asynchronous i/o, i.e. just * schedule i/o via ->writepage or do it via kntfsd or whatever. */ int write_mft_record_nolock(ntfs_inode *ni, MFT_RECORD *m, int sync) { ntfs_volume *vol = ni->vol; struct page *page = ni->page; |
78af34f03 NTFS: Implement s... |
657 658 |
unsigned int blocksize = vol->sb->s_blocksize; unsigned char blocksize_bits = vol->sb->s_blocksize_bits; |
1da177e4c Linux-2.6.12-rc2 |
659 |
int max_bhs = vol->mft_record_size / blocksize; |
ab62ef82e ntfs: mft: remove... |
660 |
struct buffer_head *bhs[MAX_BHS]; |
1da177e4c Linux-2.6.12-rc2 |
661 662 663 664 665 666 667 668 669 |
struct buffer_head *bh, *head; runlist_element *rl; unsigned int block_start, block_end, m_start, m_end; int i_bhs, nr_bhs, err = 0; ntfs_debug("Entering for inode 0x%lx.", ni->mft_no); BUG_ON(NInoAttr(ni)); BUG_ON(!max_bhs); BUG_ON(!PageLocked(page)); |
ab62ef82e ntfs: mft: remove... |
670 671 672 673 |
if (WARN_ON(max_bhs > MAX_BHS)) { err = -EINVAL; goto err_out; } |
1da177e4c Linux-2.6.12-rc2 |
674 675 676 677 678 679 680 681 |
/* * If the ntfs_inode is clean no need to do anything. If it is dirty, * mark it as clean now so that it can be redirtied later on if needed. * There is no danger of races since the caller is holding the locks * for the mft record @m and the page it is in. */ if (!NInoTestClearDirty(ni)) goto done; |
1da177e4c Linux-2.6.12-rc2 |
682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 |
bh = head = page_buffers(page); BUG_ON(!bh); rl = NULL; nr_bhs = 0; block_start = 0; m_start = ni->page_ofs; m_end = m_start + vol->mft_record_size; do { block_end = block_start + blocksize; /* If the buffer is outside the mft record, skip it. */ if (block_end <= m_start) continue; if (unlikely(block_start >= m_end)) break; /* * If this block is not the first one in the record, we ignore * the buffer's dirty state because we could have raced with a * parallel mark_ntfs_record_dirty(). */ if (block_start == m_start) { /* This block is the first one in the record. */ if (!buffer_dirty(bh)) { BUG_ON(nr_bhs); /* Clean records are not written out. */ break; } } /* Need to map the buffer if it is not mapped already. */ if (unlikely(!buffer_mapped(bh))) { VCN vcn; LCN lcn; unsigned int vcn_ofs; |
e74589ac2 NTFS: Fix bug in ... |
714 |
bh->b_bdev = vol->sb->s_bdev; |
1da177e4c Linux-2.6.12-rc2 |
715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 |
/* Obtain the vcn and offset of the current block. */ vcn = ((VCN)ni->mft_no << vol->mft_record_size_bits) + (block_start - m_start); vcn_ofs = vcn & vol->cluster_size_mask; vcn >>= vol->cluster_size_bits; if (!rl) { down_read(&NTFS_I(vol->mft_ino)->runlist.lock); rl = NTFS_I(vol->mft_ino)->runlist.rl; BUG_ON(!rl); } /* Seek to element containing target vcn. */ while (rl->length && rl[1].vcn <= vcn) rl++; lcn = ntfs_rl_vcn_to_lcn(rl, vcn); /* For $MFT, only lcn >= 0 is a successful remap. */ if (likely(lcn >= 0)) { /* Setup buffer head to correct block. */ bh->b_blocknr = ((lcn << vol->cluster_size_bits) + vcn_ofs) >> blocksize_bits; set_buffer_mapped(bh); } else { bh->b_blocknr = -1; ntfs_error(vol->sb, "Cannot write mft record " "0x%lx because its location " "on disk could not be " "determined (error code %lli).", ni->mft_no, (long long)lcn); err = -EIO; } } BUG_ON(!buffer_uptodate(bh)); BUG_ON(!nr_bhs && (m_start != block_start)); BUG_ON(nr_bhs >= max_bhs); bhs[nr_bhs++] = bh; BUG_ON((nr_bhs >= max_bhs) && (m_end != block_end)); } while (block_start = block_end, (bh = bh->b_this_page) != head); if (unlikely(rl)) up_read(&NTFS_I(vol->mft_ino)->runlist.lock); if (!nr_bhs) goto done; if (unlikely(err)) goto cleanup_out; /* Apply the mst protection fixups. */ err = pre_write_mst_fixup((NTFS_RECORD*)m, vol->mft_record_size); if (err) { ntfs_error(vol->sb, "Failed to apply mst fixups!"); goto cleanup_out; } flush_dcache_mft_record_page(ni); /* Lock buffers and start synchronous write i/o on them. */ for (i_bhs = 0; i_bhs < nr_bhs; i_bhs++) { struct buffer_head *tbh = bhs[i_bhs]; |
ca5de404f fs: rename buffer... |
768 |
if (!trylock_buffer(tbh)) |
1da177e4c Linux-2.6.12-rc2 |
769 770 771 772 773 |
BUG(); BUG_ON(!buffer_uptodate(tbh)); clear_buffer_dirty(tbh); get_bh(tbh); tbh->b_end_io = end_buffer_write_sync; |
2a222ca99 fs: have submit_b... |
774 |
submit_bh(REQ_OP_WRITE, 0, tbh); |
1da177e4c Linux-2.6.12-rc2 |
775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 |
} /* Synchronize the mft mirror now if not @sync. */ if (!sync && ni->mft_no < vol->mftmirr_size) ntfs_sync_mft_mirror(vol, ni->mft_no, m, sync); /* Wait on i/o completion of buffers. */ for (i_bhs = 0; i_bhs < nr_bhs; i_bhs++) { struct buffer_head *tbh = bhs[i_bhs]; wait_on_buffer(tbh); if (unlikely(!buffer_uptodate(tbh))) { err = -EIO; /* * Set the buffer uptodate so the page and buffer * states do not become out of sync. */ if (PageUptodate(page)) set_buffer_uptodate(tbh); } } /* If @sync, now synchronize the mft mirror. */ if (sync && ni->mft_no < vol->mftmirr_size) ntfs_sync_mft_mirror(vol, ni->mft_no, m, sync); /* Remove the mst protection fixups again. */ post_write_mst_fixup((NTFS_RECORD*)m); flush_dcache_mft_record_page(ni); if (unlikely(err)) { /* I/O error during writing. This is really bad! */ ntfs_error(vol->sb, "I/O error while writing mft record " "0x%lx! Marking base inode as bad. You " "should unmount the volume and run chkdsk.", ni->mft_no); goto err_out; } done: ntfs_debug("Done."); return 0; cleanup_out: /* Clean the buffers. */ for (i_bhs = 0; i_bhs < nr_bhs; i_bhs++) clear_buffer_dirty(bhs[i_bhs]); err_out: /* * Current state: all buffers are clean, unlocked, and uptodate. * The caller should mark the base inode as bad so that no more i/o * happens. ->clear_inode() will still be invoked so all extent inodes * and other allocated memory will be freed. */ if (err == -ENOMEM) { ntfs_error(vol->sb, "Not enough memory to write mft record. " "Redirtying so the write is retried later."); mark_mft_record_dirty(ni); err = 0; } else NVolSetErrors(vol); return err; } /** * ntfs_may_write_mft_record - check if an mft record may be written out * @vol: [IN] ntfs volume on which the mft record to check resides * @mft_no: [IN] mft record number of the mft record to check * @m: [IN] mapped mft record to check * @locked_ni: [OUT] caller has to unlock this ntfs inode if one is returned * * Check if the mapped (base or extent) mft record @m with mft record number * @mft_no belonging to the ntfs volume @vol may be written out. If necessary * and possible the ntfs inode of the mft record is locked and the base vfs * inode is pinned. The locked ntfs inode is then returned in @locked_ni. The * caller is responsible for unlocking the ntfs inode and unpinning the base * vfs inode. * |
c49c31115 [PATCH] fs/ntfs: ... |
846 |
* Return 'true' if the mft record may be written out and 'false' if not. |
1da177e4c Linux-2.6.12-rc2 |
847 848 849 850 851 852 853 854 855 856 |
* * The caller has locked the page and cleared the uptodate flag on it which * means that we can safely write out any dirty mft records that do not have * their inodes in icache as determined by ilookup5() as anyone * opening/creating such an inode would block when attempting to map the mft * record in read_cache_page() until we are finished with the write out. * * Here is a description of the tests we perform: * * If the inode is found in icache we know the mft record must be a base mft |
c49c31115 [PATCH] fs/ntfs: ... |
857 |
* record. If it is dirty, we do not write it and return 'false' as the vfs |
1da177e4c Linux-2.6.12-rc2 |
858 859 860 861 862 863 864 865 |
* inode write paths will result in the access times being updated which would * cause the base mft record to be redirtied and written out again. (We know * the access time update will modify the base mft record because Windows * chkdsk complains if the standard information attribute is not in the base * mft record.) * * If the inode is in icache and not dirty, we attempt to lock the mft record * and if we find the lock was already taken, it is not safe to write the mft |
c49c31115 [PATCH] fs/ntfs: ... |
866 |
* record and we return 'false'. |
1da177e4c Linux-2.6.12-rc2 |
867 868 869 |
* * If we manage to obtain the lock we have exclusive access to the mft record, * which also allows us safe writeout of the mft record. We then set |
c49c31115 [PATCH] fs/ntfs: ... |
870 |
* @locked_ni to the locked ntfs inode and return 'true'. |
1da177e4c Linux-2.6.12-rc2 |
871 872 873 874 875 876 877 878 879 |
* * Note we cannot just lock the mft record and sleep while waiting for the lock * because this would deadlock due to lock reversal (normally the mft record is * locked before the page is locked but we already have the page locked here * when we try to lock the mft record). * * If the inode is not in icache we need to perform further checks. * * If the mft record is not a FILE record or it is a base mft record, we can |
c49c31115 [PATCH] fs/ntfs: ... |
880 |
* safely write it and return 'true'. |
1da177e4c Linux-2.6.12-rc2 |
881 882 883 |
* * We now know the mft record is an extent mft record. We check if the inode * corresponding to its base mft record is in icache and obtain a reference to |
c49c31115 [PATCH] fs/ntfs: ... |
884 |
* it if it is. If it is not, we can safely write it and return 'true'. |
1da177e4c Linux-2.6.12-rc2 |
885 886 887 |
* * We now have the base inode for the extent mft record. We check if it has an * ntfs inode for the extent mft record attached and if not it is safe to write |
c49c31115 [PATCH] fs/ntfs: ... |
888 |
* the extent mft record and we return 'true'. |
1da177e4c Linux-2.6.12-rc2 |
889 890 891 |
* * The ntfs inode for the extent mft record is attached to the base inode so we * attempt to lock the extent mft record and if we find the lock was already |
c49c31115 [PATCH] fs/ntfs: ... |
892 |
* taken, it is not safe to write the extent mft record and we return 'false'. |
1da177e4c Linux-2.6.12-rc2 |
893 894 895 896 |
* * If we manage to obtain the lock we have exclusive access to the extent mft * record, which also allows us safe writeout of the extent mft record. We * set the ntfs inode of the extent mft record clean and then set @locked_ni to |
c49c31115 [PATCH] fs/ntfs: ... |
897 |
* the now locked ntfs inode and return 'true'. |
1da177e4c Linux-2.6.12-rc2 |
898 899 900 901 902 903 904 905 906 907 908 909 910 |
* * Note, the reason for actually writing dirty mft records here and not just * relying on the vfs inode dirty code paths is that we can have mft records * modified without them ever having actual inodes in memory. Also we can have * dirty mft records with clean ntfs inodes in memory. None of the described * cases would result in the dirty mft records being written out if we only * relied on the vfs inode dirty code paths. And these cases can really occur * during allocation of new mft records and in particular when the * initialized_size of the $MFT/$DATA attribute is extended and the new space * is initialized using ntfs_mft_record_format(). The clean inode can then * appear if the mft record is reused for a new inode before it got written * out. */ |
c49c31115 [PATCH] fs/ntfs: ... |
911 |
bool ntfs_may_write_mft_record(ntfs_volume *vol, const unsigned long mft_no, |
1da177e4c Linux-2.6.12-rc2 |
912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 |
const MFT_RECORD *m, ntfs_inode **locked_ni) { struct super_block *sb = vol->sb; struct inode *mft_vi = vol->mft_ino; struct inode *vi; ntfs_inode *ni, *eni, **extent_nis; int i; ntfs_attr na; ntfs_debug("Entering for inode 0x%lx.", mft_no); /* * Normally we do not return a locked inode so set @locked_ni to NULL. */ BUG_ON(!locked_ni); *locked_ni = NULL; /* * Check if the inode corresponding to this mft record is in the VFS * inode cache and obtain a reference to it if it is. */ ntfs_debug("Looking for inode 0x%lx in icache.", mft_no); na.mft_no = mft_no; na.name = NULL; na.name_len = 0; na.type = AT_UNUSED; /* |
ba6d2377c NTFS: Fix a nasty... |
937 938 |
* Optimize inode 0, i.e. $MFT itself, since we have it in memory and * we get here for it rather often. |
1da177e4c Linux-2.6.12-rc2 |
939 940 941 942 943 |
*/ if (!mft_no) { /* Balance the below iput(). */ vi = igrab(mft_vi); BUG_ON(vi != mft_vi); |
ba6d2377c NTFS: Fix a nasty... |
944 945 946 947 948 949 950 951 952 953 |
} else { /* * Have to use ilookup5_nowait() since ilookup5() waits for the * inode lock which causes ntfs to deadlock when a concurrent * inode write via the inode dirty code paths and the page * dirty code path of the inode dirty code path when writing * $MFT occurs. */ vi = ilookup5_nowait(sb, mft_no, (test_t)ntfs_test_inode, &na); } |
1da177e4c Linux-2.6.12-rc2 |
954 955 956 957 958 959 960 961 962 963 964 965 |
if (vi) { ntfs_debug("Base inode 0x%lx is in icache.", mft_no); /* The inode is in icache. */ ni = NTFS_I(vi); /* Take a reference to the ntfs inode. */ atomic_inc(&ni->count); /* If the inode is dirty, do not write this record. */ if (NInoDirty(ni)) { ntfs_debug("Inode 0x%lx is dirty, do not write it.", mft_no); atomic_dec(&ni->count); iput(vi); |
c49c31115 [PATCH] fs/ntfs: ... |
966 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
967 968 969 |
} ntfs_debug("Inode 0x%lx is not dirty.", mft_no); /* The inode is not dirty, try to take the mft record lock. */ |
4e5e529ad NTFS: Semaphore t... |
970 |
if (unlikely(!mutex_trylock(&ni->mrec_lock))) { |
1da177e4c Linux-2.6.12-rc2 |
971 972 973 974 |
ntfs_debug("Mft record 0x%lx is already locked, do " "not write it.", mft_no); atomic_dec(&ni->count); iput(vi); |
c49c31115 [PATCH] fs/ntfs: ... |
975 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
976 977 978 979 980 981 982 983 |
} ntfs_debug("Managed to lock mft record 0x%lx, write it.", mft_no); /* * The write has to occur while we hold the mft record lock so * return the locked ntfs inode. */ *locked_ni = ni; |
c49c31115 [PATCH] fs/ntfs: ... |
984 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
985 986 987 988 989 990 991 |
} ntfs_debug("Inode 0x%lx is not in icache.", mft_no); /* The inode is not in icache. */ /* Write the record if it is not a mft record (type "FILE"). */ if (!ntfs_is_mft_record(m->magic)) { ntfs_debug("Mft record 0x%lx is not a FILE record, write it.", mft_no); |
c49c31115 [PATCH] fs/ntfs: ... |
992 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
993 994 995 996 997 |
} /* Write the mft record if it is a base inode. */ if (!m->base_mft_record) { ntfs_debug("Mft record 0x%lx is a base record, write it.", mft_no); |
c49c31115 [PATCH] fs/ntfs: ... |
998 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
999 1000 1001 1002 1003 1004 1005 1006 1007 |
} /* * This is an extent mft record. Check if the inode corresponding to * its base mft record is in icache and obtain a reference to it if it * is. */ na.mft_no = MREF_LE(m->base_mft_record); ntfs_debug("Mft record 0x%lx is an extent record. Looking for base " "inode 0x%lx in icache.", mft_no, na.mft_no); |
ba6d2377c NTFS: Fix a nasty... |
1008 1009 1010 1011 1012 1013 1014 |
if (!na.mft_no) { /* Balance the below iput(). */ vi = igrab(mft_vi); BUG_ON(vi != mft_vi); } else vi = ilookup5_nowait(sb, na.mft_no, (test_t)ntfs_test_inode, &na); |
1da177e4c Linux-2.6.12-rc2 |
1015 1016 1017 1018 1019 1020 1021 |
if (!vi) { /* * The base inode is not in icache, write this extent mft * record. */ ntfs_debug("Base inode 0x%lx is not in icache, write the " "extent record.", na.mft_no); |
c49c31115 [PATCH] fs/ntfs: ... |
1022 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
1023 1024 1025 1026 1027 1028 1029 |
} ntfs_debug("Base inode 0x%lx is in icache.", na.mft_no); /* * The base inode is in icache. Check if it has the extent inode * corresponding to this extent mft record attached. */ ni = NTFS_I(vi); |
4e5e529ad NTFS: Semaphore t... |
1030 |
mutex_lock(&ni->extent_lock); |
1da177e4c Linux-2.6.12-rc2 |
1031 1032 1033 1034 1035 |
if (ni->nr_extents <= 0) { /* * The base inode has no attached extent inodes, write this * extent mft record. */ |
4e5e529ad NTFS: Semaphore t... |
1036 |
mutex_unlock(&ni->extent_lock); |
1da177e4c Linux-2.6.12-rc2 |
1037 1038 1039 |
iput(vi); ntfs_debug("Base inode 0x%lx has no attached extent inodes, " "write the extent record.", na.mft_no); |
c49c31115 [PATCH] fs/ntfs: ... |
1040 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 |
} /* Iterate over the attached extent inodes. */ extent_nis = ni->ext.extent_ntfs_inos; for (eni = NULL, i = 0; i < ni->nr_extents; ++i) { if (mft_no == extent_nis[i]->mft_no) { /* * Found the extent inode corresponding to this extent * mft record. */ eni = extent_nis[i]; break; } } /* * If the extent inode was not attached to the base inode, write this * extent mft record. */ if (!eni) { |
4e5e529ad NTFS: Semaphore t... |
1059 |
mutex_unlock(&ni->extent_lock); |
1da177e4c Linux-2.6.12-rc2 |
1060 1061 1062 1063 |
iput(vi); ntfs_debug("Extent inode 0x%lx is not attached to its base " "inode 0x%lx, write the extent record.", mft_no, na.mft_no); |
c49c31115 [PATCH] fs/ntfs: ... |
1064 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
1065 1066 1067 1068 1069 |
} ntfs_debug("Extent inode 0x%lx is attached to its base inode 0x%lx.", mft_no, na.mft_no); /* Take a reference to the extent ntfs inode. */ atomic_inc(&eni->count); |
4e5e529ad NTFS: Semaphore t... |
1070 |
mutex_unlock(&ni->extent_lock); |
1da177e4c Linux-2.6.12-rc2 |
1071 1072 1073 1074 |
/* * Found the extent inode coresponding to this extent mft record. * Try to take the mft record lock. */ |
4e5e529ad NTFS: Semaphore t... |
1075 |
if (unlikely(!mutex_trylock(&eni->mrec_lock))) { |
1da177e4c Linux-2.6.12-rc2 |
1076 1077 1078 1079 |
atomic_dec(&eni->count); iput(vi); ntfs_debug("Extent mft record 0x%lx is already locked, do " "not write it.", mft_no); |
c49c31115 [PATCH] fs/ntfs: ... |
1080 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 |
} ntfs_debug("Managed to lock extent mft record 0x%lx, write it.", mft_no); if (NInoTestClearDirty(eni)) ntfs_debug("Extent inode 0x%lx is dirty, marking it clean.", mft_no); /* * The write has to occur while we hold the mft record lock so return * the locked extent ntfs inode. */ *locked_ni = eni; |
c49c31115 [PATCH] fs/ntfs: ... |
1092 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 |
} static const char *es = " Leaving inconsistent metadata. Unmount and run " "chkdsk."; /** * ntfs_mft_bitmap_find_and_alloc_free_rec_nolock - see name * @vol: volume on which to search for a free mft record * @base_ni: open base inode if allocating an extent mft record or NULL * * Search for a free mft record in the mft bitmap attribute on the ntfs volume * @vol. * * If @base_ni is NULL start the search at the default allocator position. * * If @base_ni is not NULL start the search at the mft record after the base * mft record @base_ni. * * Return the free mft record on success and -errno on error. An error code of * -ENOSPC means that there are no free mft records in the currently * initialized mft bitmap. * * Locking: Caller must hold vol->mftbmp_lock for writing. */ static int ntfs_mft_bitmap_find_and_alloc_free_rec_nolock(ntfs_volume *vol, ntfs_inode *base_ni) { s64 pass_end, ll, data_pos, pass_start, ofs, bit; |
07a4e2da7 NTFS: Use i_size_... |
1121 |
unsigned long flags; |
1da177e4c Linux-2.6.12-rc2 |
1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 |
struct address_space *mftbmp_mapping; u8 *buf, *byte; struct page *page; unsigned int page_ofs, size; u8 pass, b; ntfs_debug("Searching for free mft record in the currently " "initialized mft bitmap."); mftbmp_mapping = vol->mftbmp_ino->i_mapping; /* * Set the end of the pass making sure we do not overflow the mft * bitmap. */ |
07a4e2da7 NTFS: Use i_size_... |
1135 |
read_lock_irqsave(&NTFS_I(vol->mft_ino)->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
1136 1137 |
pass_end = NTFS_I(vol->mft_ino)->allocated_size >> vol->mft_record_size_bits; |
07a4e2da7 NTFS: Use i_size_... |
1138 1139 |
read_unlock_irqrestore(&NTFS_I(vol->mft_ino)->size_lock, flags); read_lock_irqsave(&NTFS_I(vol->mftbmp_ino)->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
1140 |
ll = NTFS_I(vol->mftbmp_ino)->initialized_size << 3; |
07a4e2da7 NTFS: Use i_size_... |
1141 |
read_unlock_irqrestore(&NTFS_I(vol->mftbmp_ino)->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 |
if (pass_end > ll) pass_end = ll; pass = 1; if (!base_ni) data_pos = vol->mft_data_pos; else data_pos = base_ni->mft_no + 1; if (data_pos < 24) data_pos = 24; if (data_pos >= pass_end) { data_pos = 24; pass = 2; /* This happens on a freshly formatted volume. */ if (data_pos >= pass_end) return -ENOSPC; } pass_start = data_pos; ntfs_debug("Starting bitmap search: pass %u, pass_start 0x%llx, " "pass_end 0x%llx, data_pos 0x%llx.", pass, (long long)pass_start, (long long)pass_end, (long long)data_pos); /* Loop until a free mft record is found. */ for (; pass <= 2;) { /* Cap size to pass_end. */ ofs = data_pos >> 3; |
09cbfeaf1 mm, fs: get rid o... |
1167 1168 |
page_ofs = ofs & ~PAGE_MASK; size = PAGE_SIZE - page_ofs; |
1da177e4c Linux-2.6.12-rc2 |
1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 |
ll = ((pass_end + 7) >> 3) - ofs; if (size > ll) size = ll; size <<= 3; /* * If we are still within the active pass, search the next page * for a zero bit. */ if (size) { page = ntfs_map_page(mftbmp_mapping, |
09cbfeaf1 mm, fs: get rid o... |
1179 |
ofs >> PAGE_SHIFT); |
801678c5a Remove duplicated... |
1180 |
if (IS_ERR(page)) { |
1da177e4c Linux-2.6.12-rc2 |
1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 |
ntfs_error(vol->sb, "Failed to read mft " "bitmap, aborting."); return PTR_ERR(page); } buf = (u8*)page_address(page) + page_ofs; bit = data_pos & 7; data_pos &= ~7ull; ntfs_debug("Before inner for loop: size 0x%x, " "data_pos 0x%llx, bit 0x%llx", size, (long long)data_pos, (long long)bit); for (; bit < size && data_pos + bit < pass_end; bit &= ~7ull, bit += 8) { byte = buf + (bit >> 3); if (*byte == 0xff) continue; b = ffz((unsigned long)*byte); if (b < 8 && b >= (bit & 7)) { ll = data_pos + (bit & ~7ull) + b; if (unlikely(ll > (1ll << 32))) { ntfs_unmap_page(page); return -ENOSPC; } *byte |= 1 << b; flush_dcache_page(page); set_page_dirty(page); ntfs_unmap_page(page); ntfs_debug("Done. (Found and " "allocated mft record " "0x%llx.)", (long long)ll); return ll; } } ntfs_debug("After inner for loop: size 0x%x, " "data_pos 0x%llx, bit 0x%llx", size, (long long)data_pos, (long long)bit); data_pos += size; ntfs_unmap_page(page); /* * If the end of the pass has not been reached yet, * continue searching the mft bitmap for a zero bit. */ if (data_pos < pass_end) continue; } /* Do the next pass. */ if (++pass == 2) { /* * Starting the second pass, in which we scan the first * part of the zone which we omitted earlier. */ pass_end = pass_start; data_pos = pass_start = 24; ntfs_debug("pass %i, pass_start 0x%llx, pass_end " "0x%llx.", pass, (long long)pass_start, (long long)pass_end); if (data_pos >= pass_end) break; } } /* No free mft records in currently initialized mft bitmap. */ ntfs_debug("Done. (No free mft records left in currently initialized " "mft bitmap.)"); return -ENOSPC; } /** * ntfs_mft_bitmap_extend_allocation_nolock - extend mft bitmap by a cluster * @vol: volume on which to extend the mft bitmap attribute * * Extend the mft bitmap attribute on the ntfs volume @vol by one cluster. * * Note: Only changes allocated_size, i.e. does not touch initialized_size or * data_size. * * Return 0 on success and -errno on error. * * Locking: - Caller must hold vol->mftbmp_lock for writing. * - This function takes NTFS_I(vol->mftbmp_ino)->runlist.lock for * writing and releases it before returning. * - This function takes vol->lcnbmp_lock for writing and releases it * before returning. */ static int ntfs_mft_bitmap_extend_allocation_nolock(ntfs_volume *vol) { LCN lcn; s64 ll; |
07a4e2da7 NTFS: Use i_size_... |
1268 |
unsigned long flags; |
1da177e4c Linux-2.6.12-rc2 |
1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 |
struct page *page; ntfs_inode *mft_ni, *mftbmp_ni; runlist_element *rl, *rl2 = NULL; ntfs_attr_search_ctx *ctx = NULL; MFT_RECORD *mrec; ATTR_RECORD *a = NULL; int ret, mp_size; u32 old_alen = 0; u8 *b, tb; struct { u8 added_cluster:1; u8 added_run:1; u8 mp_rebuilt:1; } status = { 0, 0, 0 }; ntfs_debug("Extending mft bitmap allocation."); mft_ni = NTFS_I(vol->mft_ino); mftbmp_ni = NTFS_I(vol->mftbmp_ino); /* * Determine the last lcn of the mft bitmap. The allocated size of the * mft bitmap cannot be zero so we are ok to do this. |
1da177e4c Linux-2.6.12-rc2 |
1290 |
*/ |
b6ad6c52f NTFS: - Split ntf... |
1291 |
down_write(&mftbmp_ni->runlist.lock); |
07a4e2da7 NTFS: Use i_size_... |
1292 1293 1294 |
read_lock_irqsave(&mftbmp_ni->size_lock, flags); ll = mftbmp_ni->allocated_size; read_unlock_irqrestore(&mftbmp_ni->size_lock, flags); |
c0c1cc0e4 NTFS: - Fix bug i... |
1295 |
rl = ntfs_attr_find_vcn_nolock(mftbmp_ni, |
69b41e3c0 NTFS: Change ntfs... |
1296 |
(ll - 1) >> vol->cluster_size_bits, NULL); |
cc22c800e ntfs: remove (un)... |
1297 |
if (IS_ERR(rl) || unlikely(!rl->length || rl->lcn < 0)) { |
b6ad6c52f NTFS: - Split ntf... |
1298 |
up_write(&mftbmp_ni->runlist.lock); |
1da177e4c Linux-2.6.12-rc2 |
1299 1300 |
ntfs_error(vol->sb, "Failed to determine last allocated " "cluster of mft bitmap attribute."); |
b6ad6c52f NTFS: - Split ntf... |
1301 |
if (!IS_ERR(rl)) |
1da177e4c Linux-2.6.12-rc2 |
1302 |
ret = -EIO; |
b6ad6c52f NTFS: - Split ntf... |
1303 |
else |
1da177e4c Linux-2.6.12-rc2 |
1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 |
ret = PTR_ERR(rl); return ret; } lcn = rl->lcn + rl->length; ntfs_debug("Last lcn of mft bitmap attribute is 0x%llx.", (long long)lcn); /* * Attempt to get the cluster following the last allocated cluster by * hand as it may be in the MFT zone so the allocator would not give it * to us. */ ll = lcn >> 3; page = ntfs_map_page(vol->lcnbmp_ino->i_mapping, |
09cbfeaf1 mm, fs: get rid o... |
1317 |
ll >> PAGE_SHIFT); |
1da177e4c Linux-2.6.12-rc2 |
1318 1319 1320 1321 1322 |
if (IS_ERR(page)) { up_write(&mftbmp_ni->runlist.lock); ntfs_error(vol->sb, "Failed to read from lcn bitmap."); return PTR_ERR(page); } |
09cbfeaf1 mm, fs: get rid o... |
1323 |
b = (u8*)page_address(page) + (ll & ~PAGE_MASK); |
1da177e4c Linux-2.6.12-rc2 |
1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 |
tb = 1 << (lcn & 7ull); down_write(&vol->lcnbmp_lock); if (*b != 0xff && !(*b & tb)) { /* Next cluster is free, allocate it. */ *b |= tb; flush_dcache_page(page); set_page_dirty(page); up_write(&vol->lcnbmp_lock); ntfs_unmap_page(page); /* Update the mft bitmap runlist. */ rl->length++; rl[1].vcn++; status.added_cluster = 1; ntfs_debug("Appending one cluster to mft bitmap."); } else { up_write(&vol->lcnbmp_lock); ntfs_unmap_page(page); /* Allocate a cluster from the DATA_ZONE. */ |
fc0fa7dc7 NTFS: - Change nt... |
1342 |
rl2 = ntfs_cluster_alloc(vol, rl[1].vcn, 1, lcn, DATA_ZONE, |
c49c31115 [PATCH] fs/ntfs: ... |
1343 |
true); |
1da177e4c Linux-2.6.12-rc2 |
1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 |
if (IS_ERR(rl2)) { up_write(&mftbmp_ni->runlist.lock); ntfs_error(vol->sb, "Failed to allocate a cluster for " "the mft bitmap."); return PTR_ERR(rl2); } rl = ntfs_runlists_merge(mftbmp_ni->runlist.rl, rl2); if (IS_ERR(rl)) { up_write(&mftbmp_ni->runlist.lock); ntfs_error(vol->sb, "Failed to merge runlists for mft " "bitmap."); if (ntfs_cluster_free_from_rl(vol, rl2)) { |
9b556248e NTFS: Correct two... |
1356 |
ntfs_error(vol->sb, "Failed to deallocate " |
1da177e4c Linux-2.6.12-rc2 |
1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 |
"allocated cluster.%s", es); NVolSetErrors(vol); } ntfs_free(rl2); return PTR_ERR(rl); } mftbmp_ni->runlist.rl = rl; status.added_run = 1; ntfs_debug("Adding one run to mft bitmap."); /* Find the last run in the new runlist. */ for (; rl[1].length; rl++) ; } /* * Update the attribute record as well. Note: @rl is the last * (non-terminator) runlist element of mft bitmap. */ mrec = map_mft_record(mft_ni); if (IS_ERR(mrec)) { ntfs_error(vol->sb, "Failed to map mft record."); ret = PTR_ERR(mrec); goto undo_alloc; } ctx = ntfs_attr_get_search_ctx(mft_ni, mrec); if (unlikely(!ctx)) { ntfs_error(vol->sb, "Failed to get search context."); ret = -ENOMEM; goto undo_alloc; } ret = ntfs_attr_lookup(mftbmp_ni->type, mftbmp_ni->name, mftbmp_ni->name_len, CASE_SENSITIVE, rl[1].vcn, NULL, 0, ctx); if (unlikely(ret)) { ntfs_error(vol->sb, "Failed to find last attribute extent of " "mft bitmap attribute."); if (ret == -ENOENT) ret = -EIO; goto undo_alloc; } a = ctx->attr; ll = sle64_to_cpu(a->data.non_resident.lowest_vcn); /* Search back for the previous last allocated cluster of mft bitmap. */ for (rl2 = rl; rl2 > mftbmp_ni->runlist.rl; rl2--) { if (ll >= rl2->vcn) break; } BUG_ON(ll < rl2->vcn); BUG_ON(ll >= rl2->vcn + rl2->length); /* Get the size for the new mapping pairs array for this extent. */ |
fa3be9231 NTFS: Add an extr... |
1406 |
mp_size = ntfs_get_size_for_mapping_pairs(vol, rl2, ll, -1); |
1da177e4c Linux-2.6.12-rc2 |
1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 |
if (unlikely(mp_size <= 0)) { ntfs_error(vol->sb, "Get size for mapping pairs failed for " "mft bitmap attribute extent."); ret = mp_size; if (!ret) ret = -EIO; goto undo_alloc; } /* Expand the attribute record if necessary. */ old_alen = le32_to_cpu(a->length); ret = ntfs_attr_record_resize(ctx->mrec, a, mp_size + le16_to_cpu(a->data.non_resident.mapping_pairs_offset)); if (unlikely(ret)) { if (ret != -ENOSPC) { ntfs_error(vol->sb, "Failed to resize attribute " "record for mft bitmap attribute."); goto undo_alloc; } // TODO: Deal with this by moving this extent to a new mft // record or by starting a new extent in a new mft record or by // moving other attributes out of this mft record. |
b6ad6c52f NTFS: - Split ntf... |
1428 1429 |
// Note: It will need to be a special mft record and if none of // those are available it gets rather complicated... |
1da177e4c Linux-2.6.12-rc2 |
1430 |
ntfs_error(vol->sb, "Not enough space in this mft record to " |
25985edce Fix common misspe... |
1431 |
"accommodate extended mft bitmap attribute " |
1da177e4c Linux-2.6.12-rc2 |
1432 1433 1434 1435 1436 1437 1438 1439 |
"extent. Cannot handle this yet."); ret = -EOPNOTSUPP; goto undo_alloc; } status.mp_rebuilt = 1; /* Generate the mapping pairs array directly into the attr record. */ ret = ntfs_mapping_pairs_build(vol, (u8*)a + le16_to_cpu(a->data.non_resident.mapping_pairs_offset), |
fa3be9231 NTFS: Add an extr... |
1440 |
mp_size, rl2, ll, -1, NULL); |
1da177e4c Linux-2.6.12-rc2 |
1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 |
if (unlikely(ret)) { ntfs_error(vol->sb, "Failed to build mapping pairs array for " "mft bitmap attribute."); goto undo_alloc; } /* Update the highest_vcn. */ a->data.non_resident.highest_vcn = cpu_to_sle64(rl[1].vcn - 1); /* * We now have extended the mft bitmap allocated_size by one cluster. * Reflect this in the ntfs_inode structure and the attribute record. */ if (a->data.non_resident.lowest_vcn) { /* * We are not in the first attribute extent, switch to it, but * first ensure the changes will make it to disk later. */ flush_dcache_mft_record_page(ctx->ntfs_ino); mark_mft_record_dirty(ctx->ntfs_ino); ntfs_attr_reinit_search_ctx(ctx); ret = ntfs_attr_lookup(mftbmp_ni->type, mftbmp_ni->name, mftbmp_ni->name_len, CASE_SENSITIVE, 0, NULL, 0, ctx); if (unlikely(ret)) { ntfs_error(vol->sb, "Failed to find first attribute " "extent of mft bitmap attribute."); goto restore_undo_alloc; } a = ctx->attr; } |
07a4e2da7 NTFS: Use i_size_... |
1470 |
write_lock_irqsave(&mftbmp_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
1471 1472 1473 |
mftbmp_ni->allocated_size += vol->cluster_size; a->data.non_resident.allocated_size = cpu_to_sle64(mftbmp_ni->allocated_size); |
07a4e2da7 NTFS: Use i_size_... |
1474 |
write_unlock_irqrestore(&mftbmp_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 |
/* Ensure the changes make it to disk. */ flush_dcache_mft_record_page(ctx->ntfs_ino); mark_mft_record_dirty(ctx->ntfs_ino); ntfs_attr_put_search_ctx(ctx); unmap_mft_record(mft_ni); up_write(&mftbmp_ni->runlist.lock); ntfs_debug("Done."); return 0; restore_undo_alloc: ntfs_attr_reinit_search_ctx(ctx); if (ntfs_attr_lookup(mftbmp_ni->type, mftbmp_ni->name, mftbmp_ni->name_len, CASE_SENSITIVE, rl[1].vcn, NULL, 0, ctx)) { ntfs_error(vol->sb, "Failed to find last attribute extent of " "mft bitmap attribute.%s", es); |
07a4e2da7 NTFS: Use i_size_... |
1490 |
write_lock_irqsave(&mftbmp_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
1491 |
mftbmp_ni->allocated_size += vol->cluster_size; |
07a4e2da7 NTFS: Use i_size_... |
1492 |
write_unlock_irqrestore(&mftbmp_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 |
ntfs_attr_put_search_ctx(ctx); unmap_mft_record(mft_ni); up_write(&mftbmp_ni->runlist.lock); /* * The only thing that is now wrong is ->allocated_size of the * base attribute extent which chkdsk should be able to fix. */ NVolSetErrors(vol); return ret; } a = ctx->attr; a->data.non_resident.highest_vcn = cpu_to_sle64(rl[1].vcn - 2); undo_alloc: if (status.added_cluster) { /* Truncate the last run in the runlist by one cluster. */ rl->length--; rl[1].vcn--; } else if (status.added_run) { lcn = rl->lcn; /* Remove the last run from the runlist. */ rl->lcn = rl[1].lcn; rl->length = 0; } /* Deallocate the cluster. */ down_write(&vol->lcnbmp_lock); if (ntfs_bitmap_clear_bit(vol->lcnbmp_ino, lcn)) { ntfs_error(vol->sb, "Failed to free allocated cluster.%s", es); NVolSetErrors(vol); } up_write(&vol->lcnbmp_lock); if (status.mp_rebuilt) { if (ntfs_mapping_pairs_build(vol, (u8*)a + le16_to_cpu( a->data.non_resident.mapping_pairs_offset), old_alen - le16_to_cpu( a->data.non_resident.mapping_pairs_offset), |
fa3be9231 NTFS: Add an extr... |
1528 |
rl2, ll, -1, NULL)) { |
1da177e4c Linux-2.6.12-rc2 |
1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 |
ntfs_error(vol->sb, "Failed to restore mapping pairs " "array.%s", es); NVolSetErrors(vol); } if (ntfs_attr_record_resize(ctx->mrec, a, old_alen)) { ntfs_error(vol->sb, "Failed to restore attribute " "record.%s", es); NVolSetErrors(vol); } flush_dcache_mft_record_page(ctx->ntfs_ino); mark_mft_record_dirty(ctx->ntfs_ino); } if (ctx) ntfs_attr_put_search_ctx(ctx); if (!IS_ERR(mrec)) unmap_mft_record(mft_ni); up_write(&mftbmp_ni->runlist.lock); return ret; } /** * ntfs_mft_bitmap_extend_initialized_nolock - extend mftbmp initialized data * @vol: volume on which to extend the mft bitmap attribute * * Extend the initialized portion of the mft bitmap attribute on the ntfs * volume @vol by 8 bytes. * * Note: Only changes initialized_size and data_size, i.e. requires that * allocated_size is big enough to fit the new initialized_size. * * Return 0 on success and -error on error. * * Locking: Caller must hold vol->mftbmp_lock for writing. */ static int ntfs_mft_bitmap_extend_initialized_nolock(ntfs_volume *vol) { s64 old_data_size, old_initialized_size; |
07a4e2da7 NTFS: Use i_size_... |
1566 |
unsigned long flags; |
1da177e4c Linux-2.6.12-rc2 |
1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 |
struct inode *mftbmp_vi; ntfs_inode *mft_ni, *mftbmp_ni; ntfs_attr_search_ctx *ctx; MFT_RECORD *mrec; ATTR_RECORD *a; int ret; ntfs_debug("Extending mft bitmap initiailized (and data) size."); mft_ni = NTFS_I(vol->mft_ino); mftbmp_vi = vol->mftbmp_ino; mftbmp_ni = NTFS_I(mftbmp_vi); /* Get the attribute record. */ mrec = map_mft_record(mft_ni); if (IS_ERR(mrec)) { ntfs_error(vol->sb, "Failed to map mft record."); return PTR_ERR(mrec); } ctx = ntfs_attr_get_search_ctx(mft_ni, mrec); if (unlikely(!ctx)) { ntfs_error(vol->sb, "Failed to get search context."); ret = -ENOMEM; goto unm_err_out; } ret = ntfs_attr_lookup(mftbmp_ni->type, mftbmp_ni->name, mftbmp_ni->name_len, CASE_SENSITIVE, 0, NULL, 0, ctx); if (unlikely(ret)) { ntfs_error(vol->sb, "Failed to find first attribute extent of " "mft bitmap attribute."); if (ret == -ENOENT) ret = -EIO; goto put_err_out; } a = ctx->attr; |
07a4e2da7 NTFS: Use i_size_... |
1600 1601 |
write_lock_irqsave(&mftbmp_ni->size_lock, flags); old_data_size = i_size_read(mftbmp_vi); |
1da177e4c Linux-2.6.12-rc2 |
1602 1603 1604 1605 1606 1607 1608 1609 1610 |
old_initialized_size = mftbmp_ni->initialized_size; /* * We can simply update the initialized_size before filling the space * with zeroes because the caller is holding the mft bitmap lock for * writing which ensures that no one else is trying to access the data. */ mftbmp_ni->initialized_size += 8; a->data.non_resident.initialized_size = cpu_to_sle64(mftbmp_ni->initialized_size); |
07a4e2da7 NTFS: Use i_size_... |
1611 1612 |
if (mftbmp_ni->initialized_size > old_data_size) { i_size_write(mftbmp_vi, mftbmp_ni->initialized_size); |
1da177e4c Linux-2.6.12-rc2 |
1613 |
a->data.non_resident.data_size = |
07a4e2da7 NTFS: Use i_size_... |
1614 |
cpu_to_sle64(mftbmp_ni->initialized_size); |
1da177e4c Linux-2.6.12-rc2 |
1615 |
} |
07a4e2da7 NTFS: Use i_size_... |
1616 |
write_unlock_irqrestore(&mftbmp_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 |
/* Ensure the changes make it to disk. */ flush_dcache_mft_record_page(ctx->ntfs_ino); mark_mft_record_dirty(ctx->ntfs_ino); ntfs_attr_put_search_ctx(ctx); unmap_mft_record(mft_ni); /* Initialize the mft bitmap attribute value with zeroes. */ ret = ntfs_attr_set(mftbmp_ni, old_initialized_size, 8, 0); if (likely(!ret)) { ntfs_debug("Done. (Wrote eight initialized bytes to mft " "bitmap."); return 0; } ntfs_error(vol->sb, "Failed to write to mft bitmap."); /* Try to recover from the error. */ mrec = map_mft_record(mft_ni); if (IS_ERR(mrec)) { ntfs_error(vol->sb, "Failed to map mft record.%s", es); NVolSetErrors(vol); return ret; } ctx = ntfs_attr_get_search_ctx(mft_ni, mrec); if (unlikely(!ctx)) { ntfs_error(vol->sb, "Failed to get search context.%s", es); NVolSetErrors(vol); goto unm_err_out; } if (ntfs_attr_lookup(mftbmp_ni->type, mftbmp_ni->name, mftbmp_ni->name_len, CASE_SENSITIVE, 0, NULL, 0, ctx)) { ntfs_error(vol->sb, "Failed to find first attribute extent of " "mft bitmap attribute.%s", es); NVolSetErrors(vol); put_err_out: ntfs_attr_put_search_ctx(ctx); unm_err_out: unmap_mft_record(mft_ni); goto err_out; } a = ctx->attr; |
07a4e2da7 NTFS: Use i_size_... |
1655 |
write_lock_irqsave(&mftbmp_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
1656 1657 1658 |
mftbmp_ni->initialized_size = old_initialized_size; a->data.non_resident.initialized_size = cpu_to_sle64(old_initialized_size); |
07a4e2da7 NTFS: Use i_size_... |
1659 1660 |
if (i_size_read(mftbmp_vi) != old_data_size) { i_size_write(mftbmp_vi, old_data_size); |
1da177e4c Linux-2.6.12-rc2 |
1661 1662 |
a->data.non_resident.data_size = cpu_to_sle64(old_data_size); } |
07a4e2da7 NTFS: Use i_size_... |
1663 |
write_unlock_irqrestore(&mftbmp_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
1664 1665 1666 1667 |
flush_dcache_mft_record_page(ctx->ntfs_ino); mark_mft_record_dirty(ctx->ntfs_ino); ntfs_attr_put_search_ctx(ctx); unmap_mft_record(mft_ni); |
07a4e2da7 NTFS: Use i_size_... |
1668 1669 |
#ifdef DEBUG read_lock_irqsave(&mftbmp_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
1670 1671 1672 |
ntfs_debug("Restored status of mftbmp: allocated_size 0x%llx, " "data_size 0x%llx, initialized_size 0x%llx.", (long long)mftbmp_ni->allocated_size, |
07a4e2da7 NTFS: Use i_size_... |
1673 |
(long long)i_size_read(mftbmp_vi), |
1da177e4c Linux-2.6.12-rc2 |
1674 |
(long long)mftbmp_ni->initialized_size); |
07a4e2da7 NTFS: Use i_size_... |
1675 1676 |
read_unlock_irqrestore(&mftbmp_ni->size_lock, flags); #endif /* DEBUG */ |
1da177e4c Linux-2.6.12-rc2 |
1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 |
err_out: return ret; } /** * ntfs_mft_data_extend_allocation_nolock - extend mft data attribute * @vol: volume on which to extend the mft data attribute * * Extend the mft data attribute on the ntfs volume @vol by 16 mft records * worth of clusters or if not enough space for this by one mft record worth * of clusters. * * Note: Only changes allocated_size, i.e. does not touch initialized_size or * data_size. * * Return 0 on success and -errno on error. * * Locking: - Caller must hold vol->mftbmp_lock for writing. * - This function takes NTFS_I(vol->mft_ino)->runlist.lock for * writing and releases it before returning. * - This function calls functions which take vol->lcnbmp_lock for * writing and release it before returning. */ static int ntfs_mft_data_extend_allocation_nolock(ntfs_volume *vol) { LCN lcn; VCN old_last_vcn; |
07a4e2da7 NTFS: Use i_size_... |
1704 1705 |
s64 min_nr, nr, ll; unsigned long flags; |
1da177e4c Linux-2.6.12-rc2 |
1706 1707 1708 1709 1710 1711 1712 |
ntfs_inode *mft_ni; runlist_element *rl, *rl2; ntfs_attr_search_ctx *ctx = NULL; MFT_RECORD *mrec; ATTR_RECORD *a = NULL; int ret, mp_size; u32 old_alen = 0; |
c49c31115 [PATCH] fs/ntfs: ... |
1713 |
bool mp_rebuilt = false; |
1da177e4c Linux-2.6.12-rc2 |
1714 1715 1716 1717 1718 1719 1720 |
ntfs_debug("Extending mft data allocation."); mft_ni = NTFS_I(vol->mft_ino); /* * Determine the preferred allocation location, i.e. the last lcn of * the mft data attribute. The allocated size of the mft data * attribute cannot be zero so we are ok to do this. |
1da177e4c Linux-2.6.12-rc2 |
1721 |
*/ |
b6ad6c52f NTFS: - Split ntf... |
1722 |
down_write(&mft_ni->runlist.lock); |
07a4e2da7 NTFS: Use i_size_... |
1723 1724 1725 |
read_lock_irqsave(&mft_ni->size_lock, flags); ll = mft_ni->allocated_size; read_unlock_irqrestore(&mft_ni->size_lock, flags); |
c0c1cc0e4 NTFS: - Fix bug i... |
1726 |
rl = ntfs_attr_find_vcn_nolock(mft_ni, |
69b41e3c0 NTFS: Change ntfs... |
1727 |
(ll - 1) >> vol->cluster_size_bits, NULL); |
cc22c800e ntfs: remove (un)... |
1728 |
if (IS_ERR(rl) || unlikely(!rl->length || rl->lcn < 0)) { |
b6ad6c52f NTFS: - Split ntf... |
1729 |
up_write(&mft_ni->runlist.lock); |
1da177e4c Linux-2.6.12-rc2 |
1730 1731 |
ntfs_error(vol->sb, "Failed to determine last allocated " "cluster of mft data attribute."); |
b6ad6c52f NTFS: - Split ntf... |
1732 |
if (!IS_ERR(rl)) |
1da177e4c Linux-2.6.12-rc2 |
1733 |
ret = -EIO; |
b6ad6c52f NTFS: - Split ntf... |
1734 |
else |
1da177e4c Linux-2.6.12-rc2 |
1735 1736 1737 1738 |
ret = PTR_ERR(rl); return ret; } lcn = rl->lcn + rl->length; |
07a4e2da7 NTFS: Use i_size_... |
1739 |
ntfs_debug("Last lcn of mft data attribute is 0x%llx.", (long long)lcn); |
1da177e4c Linux-2.6.12-rc2 |
1740 1741 1742 1743 1744 1745 1746 1747 1748 |
/* Minimum allocation is one mft record worth of clusters. */ min_nr = vol->mft_record_size >> vol->cluster_size_bits; if (!min_nr) min_nr = 1; /* Want to allocate 16 mft records worth of clusters. */ nr = vol->mft_record_size << 4 >> vol->cluster_size_bits; if (!nr) nr = min_nr; /* Ensure we do not go above 2^32-1 mft records. */ |
07a4e2da7 NTFS: Use i_size_... |
1749 1750 1751 1752 |
read_lock_irqsave(&mft_ni->size_lock, flags); ll = mft_ni->allocated_size; read_unlock_irqrestore(&mft_ni->size_lock, flags); if (unlikely((ll + (nr << vol->cluster_size_bits)) >> |
1da177e4c Linux-2.6.12-rc2 |
1753 1754 |
vol->mft_record_size_bits >= (1ll << 32))) { nr = min_nr; |
07a4e2da7 NTFS: Use i_size_... |
1755 |
if (unlikely((ll + (nr << vol->cluster_size_bits)) >> |
1da177e4c Linux-2.6.12-rc2 |
1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 |
vol->mft_record_size_bits >= (1ll << 32))) { ntfs_warning(vol->sb, "Cannot allocate mft record " "because the maximum number of inodes " "(2^32) has already been reached."); up_write(&mft_ni->runlist.lock); return -ENOSPC; } } ntfs_debug("Trying mft data allocation with %s cluster count %lli.", nr > min_nr ? "default" : "minimal", (long long)nr); old_last_vcn = rl[1].vcn; do { |
fc0fa7dc7 NTFS: - Change nt... |
1768 |
rl2 = ntfs_cluster_alloc(vol, old_last_vcn, nr, lcn, MFT_ZONE, |
c49c31115 [PATCH] fs/ntfs: ... |
1769 |
true); |
cc22c800e ntfs: remove (un)... |
1770 |
if (!IS_ERR(rl2)) |
1da177e4c Linux-2.6.12-rc2 |
1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 |
break; if (PTR_ERR(rl2) != -ENOSPC || nr == min_nr) { ntfs_error(vol->sb, "Failed to allocate the minimal " "number of clusters (%lli) for the " "mft data attribute.", (long long)nr); up_write(&mft_ni->runlist.lock); return PTR_ERR(rl2); } /* * There is not enough space to do the allocation, but there * might be enough space to do a minimal allocation so try that * before failing. */ nr = min_nr; ntfs_debug("Retrying mft data allocation with minimal cluster " "count %lli.", (long long)nr); } while (1); rl = ntfs_runlists_merge(mft_ni->runlist.rl, rl2); if (IS_ERR(rl)) { up_write(&mft_ni->runlist.lock); ntfs_error(vol->sb, "Failed to merge runlists for mft data " "attribute."); if (ntfs_cluster_free_from_rl(vol, rl2)) { |
9b556248e NTFS: Correct two... |
1794 |
ntfs_error(vol->sb, "Failed to deallocate clusters " |
1da177e4c Linux-2.6.12-rc2 |
1795 1796 1797 1798 1799 1800 1801 |
"from the mft data attribute.%s", es); NVolSetErrors(vol); } ntfs_free(rl2); return PTR_ERR(rl); } mft_ni->runlist.rl = rl; |
8907547d4 NTFS: Fix printk ... |
1802 |
ntfs_debug("Allocated %lli clusters.", (long long)nr); |
1da177e4c Linux-2.6.12-rc2 |
1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 |
/* Find the last run in the new runlist. */ for (; rl[1].length; rl++) ; /* Update the attribute record as well. */ mrec = map_mft_record(mft_ni); if (IS_ERR(mrec)) { ntfs_error(vol->sb, "Failed to map mft record."); ret = PTR_ERR(mrec); goto undo_alloc; } ctx = ntfs_attr_get_search_ctx(mft_ni, mrec); if (unlikely(!ctx)) { ntfs_error(vol->sb, "Failed to get search context."); ret = -ENOMEM; goto undo_alloc; } ret = ntfs_attr_lookup(mft_ni->type, mft_ni->name, mft_ni->name_len, CASE_SENSITIVE, rl[1].vcn, NULL, 0, ctx); if (unlikely(ret)) { ntfs_error(vol->sb, "Failed to find last attribute extent of " "mft data attribute."); if (ret == -ENOENT) ret = -EIO; goto undo_alloc; } a = ctx->attr; ll = sle64_to_cpu(a->data.non_resident.lowest_vcn); /* Search back for the previous last allocated cluster of mft bitmap. */ for (rl2 = rl; rl2 > mft_ni->runlist.rl; rl2--) { if (ll >= rl2->vcn) break; } BUG_ON(ll < rl2->vcn); BUG_ON(ll >= rl2->vcn + rl2->length); /* Get the size for the new mapping pairs array for this extent. */ |
fa3be9231 NTFS: Add an extr... |
1838 |
mp_size = ntfs_get_size_for_mapping_pairs(vol, rl2, ll, -1); |
1da177e4c Linux-2.6.12-rc2 |
1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 |
if (unlikely(mp_size <= 0)) { ntfs_error(vol->sb, "Get size for mapping pairs failed for " "mft data attribute extent."); ret = mp_size; if (!ret) ret = -EIO; goto undo_alloc; } /* Expand the attribute record if necessary. */ old_alen = le32_to_cpu(a->length); ret = ntfs_attr_record_resize(ctx->mrec, a, mp_size + le16_to_cpu(a->data.non_resident.mapping_pairs_offset)); if (unlikely(ret)) { if (ret != -ENOSPC) { ntfs_error(vol->sb, "Failed to resize attribute " "record for mft data attribute."); goto undo_alloc; } // TODO: Deal with this by moving this extent to a new mft // record or by starting a new extent in a new mft record or by // moving other attributes out of this mft record. // Note: Use the special reserved mft records and ensure that // this extent is not required to find the mft record in |
b6ad6c52f NTFS: - Split ntf... |
1862 1863 1864 1865 1866 |
// question. If no free special records left we would need to // move an existing record away, insert ours in its place, and // then place the moved record into the newly allocated space // and we would then need to update all references to this mft // record appropriately. This is rather complicated... |
1da177e4c Linux-2.6.12-rc2 |
1867 |
ntfs_error(vol->sb, "Not enough space in this mft record to " |
25985edce Fix common misspe... |
1868 |
"accommodate extended mft data attribute " |
1da177e4c Linux-2.6.12-rc2 |
1869 1870 1871 1872 |
"extent. Cannot handle this yet."); ret = -EOPNOTSUPP; goto undo_alloc; } |
c49c31115 [PATCH] fs/ntfs: ... |
1873 |
mp_rebuilt = true; |
1da177e4c Linux-2.6.12-rc2 |
1874 1875 1876 |
/* Generate the mapping pairs array directly into the attr record. */ ret = ntfs_mapping_pairs_build(vol, (u8*)a + le16_to_cpu(a->data.non_resident.mapping_pairs_offset), |
fa3be9231 NTFS: Add an extr... |
1877 |
mp_size, rl2, ll, -1, NULL); |
1da177e4c Linux-2.6.12-rc2 |
1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 |
if (unlikely(ret)) { ntfs_error(vol->sb, "Failed to build mapping pairs array of " "mft data attribute."); goto undo_alloc; } /* Update the highest_vcn. */ a->data.non_resident.highest_vcn = cpu_to_sle64(rl[1].vcn - 1); /* * We now have extended the mft data allocated_size by nr clusters. * Reflect this in the ntfs_inode structure and the attribute record. * @rl is the last (non-terminator) runlist element of mft data * attribute. */ if (a->data.non_resident.lowest_vcn) { /* * We are not in the first attribute extent, switch to it, but * first ensure the changes will make it to disk later. */ flush_dcache_mft_record_page(ctx->ntfs_ino); mark_mft_record_dirty(ctx->ntfs_ino); ntfs_attr_reinit_search_ctx(ctx); ret = ntfs_attr_lookup(mft_ni->type, mft_ni->name, mft_ni->name_len, CASE_SENSITIVE, 0, NULL, 0, ctx); if (unlikely(ret)) { ntfs_error(vol->sb, "Failed to find first attribute " "extent of mft data attribute."); goto restore_undo_alloc; } a = ctx->attr; } |
07a4e2da7 NTFS: Use i_size_... |
1909 |
write_lock_irqsave(&mft_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
1910 1911 1912 |
mft_ni->allocated_size += nr << vol->cluster_size_bits; a->data.non_resident.allocated_size = cpu_to_sle64(mft_ni->allocated_size); |
07a4e2da7 NTFS: Use i_size_... |
1913 |
write_unlock_irqrestore(&mft_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 |
/* Ensure the changes make it to disk. */ flush_dcache_mft_record_page(ctx->ntfs_ino); mark_mft_record_dirty(ctx->ntfs_ino); ntfs_attr_put_search_ctx(ctx); unmap_mft_record(mft_ni); up_write(&mft_ni->runlist.lock); ntfs_debug("Done."); return 0; restore_undo_alloc: ntfs_attr_reinit_search_ctx(ctx); if (ntfs_attr_lookup(mft_ni->type, mft_ni->name, mft_ni->name_len, CASE_SENSITIVE, rl[1].vcn, NULL, 0, ctx)) { ntfs_error(vol->sb, "Failed to find last attribute extent of " "mft data attribute.%s", es); |
07a4e2da7 NTFS: Use i_size_... |
1928 |
write_lock_irqsave(&mft_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
1929 |
mft_ni->allocated_size += nr << vol->cluster_size_bits; |
07a4e2da7 NTFS: Use i_size_... |
1930 |
write_unlock_irqrestore(&mft_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 |
ntfs_attr_put_search_ctx(ctx); unmap_mft_record(mft_ni); up_write(&mft_ni->runlist.lock); /* * The only thing that is now wrong is ->allocated_size of the * base attribute extent which chkdsk should be able to fix. */ NVolSetErrors(vol); return ret; } |
511bea5ea NTFS: - Change {_... |
1941 1942 |
ctx->attr->data.non_resident.highest_vcn = cpu_to_sle64(old_last_vcn - 1); |
1da177e4c Linux-2.6.12-rc2 |
1943 |
undo_alloc: |
511bea5ea NTFS: - Change {_... |
1944 |
if (ntfs_cluster_free(mft_ni, old_last_vcn, -1, ctx) < 0) { |
1da177e4c Linux-2.6.12-rc2 |
1945 1946 1947 1948 |
ntfs_error(vol->sb, "Failed to free clusters from mft data " "attribute.%s", es); NVolSetErrors(vol); } |
511bea5ea NTFS: - Change {_... |
1949 |
a = ctx->attr; |
1da177e4c Linux-2.6.12-rc2 |
1950 1951 1952 1953 1954 |
if (ntfs_rl_truncate_nolock(vol, &mft_ni->runlist, old_last_vcn)) { ntfs_error(vol->sb, "Failed to truncate mft data attribute " "runlist.%s", es); NVolSetErrors(vol); } |
511bea5ea NTFS: - Change {_... |
1955 |
if (mp_rebuilt && !IS_ERR(ctx->mrec)) { |
1da177e4c Linux-2.6.12-rc2 |
1956 1957 1958 1959 |
if (ntfs_mapping_pairs_build(vol, (u8*)a + le16_to_cpu( a->data.non_resident.mapping_pairs_offset), old_alen - le16_to_cpu( a->data.non_resident.mapping_pairs_offset), |
fa3be9231 NTFS: Add an extr... |
1960 |
rl2, ll, -1, NULL)) { |
1da177e4c Linux-2.6.12-rc2 |
1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 |
ntfs_error(vol->sb, "Failed to restore mapping pairs " "array.%s", es); NVolSetErrors(vol); } if (ntfs_attr_record_resize(ctx->mrec, a, old_alen)) { ntfs_error(vol->sb, "Failed to restore attribute " "record.%s", es); NVolSetErrors(vol); } flush_dcache_mft_record_page(ctx->ntfs_ino); mark_mft_record_dirty(ctx->ntfs_ino); |
511bea5ea NTFS: - Change {_... |
1972 1973 1974 1975 |
} else if (IS_ERR(ctx->mrec)) { ntfs_error(vol->sb, "Failed to restore attribute search " "context.%s", es); NVolSetErrors(vol); |
1da177e4c Linux-2.6.12-rc2 |
1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 |
} if (ctx) ntfs_attr_put_search_ctx(ctx); if (!IS_ERR(mrec)) unmap_mft_record(mft_ni); up_write(&mft_ni->runlist.lock); return ret; } /** * ntfs_mft_record_layout - layout an mft record into a memory buffer * @vol: volume to which the mft record will belong * @mft_no: mft reference specifying the mft record number * @m: destination buffer of size >= @vol->mft_record_size bytes * * Layout an empty, unused mft record with the mft record number @mft_no into * the buffer @m. The volume @vol is needed because the mft record structure * was modified in NTFS 3.1 so we need to know which volume version this mft * record will be used on. * * Return 0 on success and -errno on error. */ static int ntfs_mft_record_layout(const ntfs_volume *vol, const s64 mft_no, MFT_RECORD *m) { ATTR_RECORD *a; ntfs_debug("Entering for mft record 0x%llx.", (long long)mft_no); if (mft_no >= (1ll << 32)) { ntfs_error(vol->sb, "Mft record number 0x%llx exceeds " "maximum of 2^32.", (long long)mft_no); return -ERANGE; } /* Start by clearing the whole mft record to gives us a clean slate. */ memset(m, 0, vol->mft_record_size); /* Aligned to 2-byte boundary. */ if (vol->major_ver < 3 || (vol->major_ver == 3 && !vol->minor_ver)) m->usa_ofs = cpu_to_le16((sizeof(MFT_RECORD_OLD) + 1) & ~1); else { m->usa_ofs = cpu_to_le16((sizeof(MFT_RECORD) + 1) & ~1); /* * Set the NTFS 3.1+ specific fields while we know that the * volume version is 3.1+. */ m->reserved = 0; m->mft_record_number = cpu_to_le32((u32)mft_no); } m->magic = magic_FILE; if (vol->mft_record_size >= NTFS_BLOCK_SIZE) m->usa_count = cpu_to_le16(vol->mft_record_size / NTFS_BLOCK_SIZE + 1); else { m->usa_count = cpu_to_le16(1); ntfs_warning(vol->sb, "Sector size is bigger than mft record " "size. Setting usa_count to 1. If chkdsk " "reports this as corruption, please email " "linux-ntfs-dev@lists.sourceforge.net stating " "that you saw this message and that the " |
b6ad6c52f NTFS: - Split ntf... |
2034 |
"modified filesystem created was corrupt. " |
1da177e4c Linux-2.6.12-rc2 |
2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 |
"Thank you."); } /* Set the update sequence number to 1. */ *(le16*)((u8*)m + le16_to_cpu(m->usa_ofs)) = cpu_to_le16(1); m->lsn = 0; m->sequence_number = cpu_to_le16(1); m->link_count = 0; /* * Place the attributes straight after the update sequence array, * aligned to 8-byte boundary. */ m->attrs_offset = cpu_to_le16((le16_to_cpu(m->usa_ofs) + (le16_to_cpu(m->usa_count) << 1) + 7) & ~7); m->flags = 0; /* * Using attrs_offset plus eight bytes (for the termination attribute). * attrs_offset is already aligned to 8-byte boundary, so no need to * align again. */ m->bytes_in_use = cpu_to_le32(le16_to_cpu(m->attrs_offset) + 8); m->bytes_allocated = cpu_to_le32(vol->mft_record_size); m->base_mft_record = 0; m->next_attr_instance = 0; /* Add the termination attribute. */ a = (ATTR_RECORD*)((u8*)m + le16_to_cpu(m->attrs_offset)); a->type = AT_END; a->length = 0; ntfs_debug("Done."); return 0; } /** * ntfs_mft_record_format - format an mft record on an ntfs volume * @vol: volume on which to format the mft record * @mft_no: mft record number to format * * Format the mft record @mft_no in $MFT/$DATA, i.e. lay out an empty, unused * mft record into the appropriate place of the mft data attribute. This is * used when extending the mft data attribute. * * Return 0 on success and -errno on error. */ static int ntfs_mft_record_format(const ntfs_volume *vol, const s64 mft_no) { |
07a4e2da7 NTFS: Use i_size_... |
2079 |
loff_t i_size; |
1da177e4c Linux-2.6.12-rc2 |
2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 |
struct inode *mft_vi = vol->mft_ino; struct page *page; MFT_RECORD *m; pgoff_t index, end_index; unsigned int ofs; int err; ntfs_debug("Entering for mft record 0x%llx.", (long long)mft_no); /* * The index into the page cache and the offset within the page cache * page of the wanted mft record. */ |
09cbfeaf1 mm, fs: get rid o... |
2092 2093 |
index = mft_no << vol->mft_record_size_bits >> PAGE_SHIFT; ofs = (mft_no << vol->mft_record_size_bits) & ~PAGE_MASK; |
1da177e4c Linux-2.6.12-rc2 |
2094 |
/* The maximum valid index into the page cache for $MFT's data. */ |
07a4e2da7 NTFS: Use i_size_... |
2095 |
i_size = i_size_read(mft_vi); |
09cbfeaf1 mm, fs: get rid o... |
2096 |
end_index = i_size >> PAGE_SHIFT; |
1da177e4c Linux-2.6.12-rc2 |
2097 2098 |
if (unlikely(index >= end_index)) { if (unlikely(index > end_index || ofs + vol->mft_record_size >= |
09cbfeaf1 mm, fs: get rid o... |
2099 |
(i_size & ~PAGE_MASK))) { |
1da177e4c Linux-2.6.12-rc2 |
2100 2101 2102 2103 2104 2105 2106 |
ntfs_error(vol->sb, "Tried to format non-existing mft " "record 0x%llx.", (long long)mft_no); return -ENOENT; } } /* Read, map, and pin the page containing the mft record. */ page = ntfs_map_page(mft_vi->i_mapping, index); |
801678c5a Remove duplicated... |
2107 |
if (IS_ERR(page)) { |
1da177e4c Linux-2.6.12-rc2 |
2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 |
ntfs_error(vol->sb, "Failed to map page containing mft record " "to format 0x%llx.", (long long)mft_no); return PTR_ERR(page); } lock_page(page); BUG_ON(!PageUptodate(page)); ClearPageUptodate(page); m = (MFT_RECORD*)((u8*)page_address(page) + ofs); err = ntfs_mft_record_layout(vol, mft_no, m); if (unlikely(err)) { ntfs_error(vol->sb, "Failed to layout mft record 0x%llx.", (long long)mft_no); SetPageUptodate(page); unlock_page(page); ntfs_unmap_page(page); return err; } flush_dcache_page(page); SetPageUptodate(page); unlock_page(page); /* * Make sure the mft record is written out to disk. We could use * ilookup5() to check if an inode is in icache and so on but this is * unnecessary as ntfs_writepage() will write the dirty record anyway. */ mark_ntfs_record_dirty(page, ofs); ntfs_unmap_page(page); ntfs_debug("Done."); return 0; } /** * ntfs_mft_record_alloc - allocate an mft record on an ntfs volume * @vol: [IN] volume on which to allocate the mft record * @mode: [IN] mode if want a file or directory, i.e. base inode or 0 * @base_ni: [IN] open base inode if allocating an extent mft record or NULL * @mrec: [OUT] on successful return this is the mapped mft record * * Allocate an mft record in $MFT/$DATA of an open ntfs volume @vol. * * If @base_ni is NULL make the mft record a base mft record, i.e. a file or * direvctory inode, and allocate it at the default allocator position. In * this case @mode is the file mode as given to us by the caller. We in * particular use @mode to distinguish whether a file or a directory is being * created (S_IFDIR(mode) and S_IFREG(mode), respectively). * * If @base_ni is not NULL make the allocated mft record an extent record, * allocate it starting at the mft record after the base mft record and attach * the allocated and opened ntfs inode to the base inode @base_ni. In this * case @mode must be 0 as it is meaningless for extent inodes. * * You need to check the return value with IS_ERR(). If false, the function * was successful and the return value is the now opened ntfs inode of the * allocated mft record. *@mrec is then set to the allocated, mapped, pinned, * and locked mft record. If IS_ERR() is true, the function failed and the * error code is obtained from PTR_ERR(return value). *@mrec is undefined in * this case. * * Allocation strategy: * * To find a free mft record, we scan the mft bitmap for a zero bit. To * optimize this we start scanning at the place specified by @base_ni or if * @base_ni is NULL we start where we last stopped and we perform wrap around * when we reach the end. Note, we do not try to allocate mft records below * number 24 because numbers 0 to 15 are the defined system files anyway and 16 * to 24 are special in that they are used for storing extension mft records * for the $DATA attribute of $MFT. This is required to avoid the possibility * of creating a runlist with a circular dependency which once written to disk * can never be read in again. Windows will only use records 16 to 24 for * normal files if the volume is completely out of space. We never use them * which means that when the volume is really out of space we cannot create any * more files while Windows can still create up to 8 small files. We can start * doing this at some later time, it does not matter much for now. * * When scanning the mft bitmap, we only search up to the last allocated mft * record. If there are no free records left in the range 24 to number of * allocated mft records, then we extend the $MFT/$DATA attribute in order to * create free mft records. We extend the allocated size of $MFT/$DATA by 16 * records at a time or one cluster, if cluster size is above 16kiB. If there * is not sufficient space to do this, we try to extend by a single mft record * or one cluster, if cluster size is above the mft record size. * * No matter how many mft records we allocate, we initialize only the first * allocated mft record, incrementing mft data size and initialized size * accordingly, open an ntfs_inode for it and return it to the caller, unless * there are less than 24 mft records, in which case we allocate and initialize * mft records until we reach record 24 which we consider as the first free mft * record for use by normal files. * * If during any stage we overflow the initialized data in the mft bitmap, we * extend the initialized size (and data size) by 8 bytes, allocating another * cluster if required. The bitmap data size has to be at least equal to the * number of mft records in the mft, but it can be bigger, in which case the * superflous bits are padded with zeroes. * * Thus, when we return successfully (IS_ERR() is false), we will have: * - initialized / extended the mft bitmap if necessary, * - initialized / extended the mft data if necessary, * - set the bit corresponding to the mft record being allocated in the * mft bitmap, * - opened an ntfs_inode for the allocated mft record, and we will have * - returned the ntfs_inode as well as the allocated mapped, pinned, and * locked mft record. * * On error, the volume will be left in a consistent state and no record will * be allocated. If rolling back a partial operation fails, we may leave some * inconsistent metadata in which case we set NVolErrors() so the volume is * left dirty when unmounted. * * Note, this function cannot make use of most of the normal functions, like * for example for attribute resizing, etc, because when the run list overflows * the base mft record and an attribute list is used, it is very important that * the extension mft records used to store the $DATA attribute of $MFT can be * reached without having to read the information contained inside them, as * this would make it impossible to find them in the first place after the * volume is unmounted. $MFT/$BITMAP probably does not need to follow this * rule because the bitmap is not essential for finding the mft records, but on * the other hand, handling the bitmap in this special way would make life * easier because otherwise there might be circular invocations of functions * when reading the bitmap. */ ntfs_inode *ntfs_mft_record_alloc(ntfs_volume *vol, const int mode, ntfs_inode *base_ni, MFT_RECORD **mrec) { s64 ll, bit, old_data_initialized, old_data_size; |
07a4e2da7 NTFS: Use i_size_... |
2233 |
unsigned long flags; |
1da177e4c Linux-2.6.12-rc2 |
2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 |
struct inode *vi; struct page *page; ntfs_inode *mft_ni, *mftbmp_ni, *ni; ntfs_attr_search_ctx *ctx; MFT_RECORD *m; ATTR_RECORD *a; pgoff_t index; unsigned int ofs; int err; le16 seq_no, usn; |
c49c31115 [PATCH] fs/ntfs: ... |
2244 |
bool record_formatted = false; |
1da177e4c Linux-2.6.12-rc2 |
2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 |
if (base_ni) { ntfs_debug("Entering (allocating an extent mft record for " "base mft record 0x%llx).", (long long)base_ni->mft_no); /* @mode and @base_ni are mutually exclusive. */ BUG_ON(mode); } else ntfs_debug("Entering (allocating a base mft record)."); if (mode) { /* @mode and @base_ni are mutually exclusive. */ BUG_ON(base_ni); /* We only support creation of normal files and directories. */ if (!S_ISREG(mode) && !S_ISDIR(mode)) return ERR_PTR(-EOPNOTSUPP); } BUG_ON(!mrec); mft_ni = NTFS_I(vol->mft_ino); mftbmp_ni = NTFS_I(vol->mftbmp_ino); down_write(&vol->mftbmp_lock); bit = ntfs_mft_bitmap_find_and_alloc_free_rec_nolock(vol, base_ni); if (bit >= 0) { ntfs_debug("Found and allocated free record (#1), bit 0x%llx.", (long long)bit); goto have_alloc_rec; } if (bit != -ENOSPC) { up_write(&vol->mftbmp_lock); return ERR_PTR(bit); } /* * No free mft records left. If the mft bitmap already covers more * than the currently used mft records, the next records are all free, * so we can simply allocate the first unused mft record. * Note: We also have to make sure that the mft bitmap at least covers * the first 24 mft records as they are special and whilst they may not * be in use, we do not allocate from them. */ |
07a4e2da7 NTFS: Use i_size_... |
2283 |
read_lock_irqsave(&mft_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
2284 |
ll = mft_ni->initialized_size >> vol->mft_record_size_bits; |
07a4e2da7 NTFS: Use i_size_... |
2285 2286 2287 2288 2289 |
read_unlock_irqrestore(&mft_ni->size_lock, flags); read_lock_irqsave(&mftbmp_ni->size_lock, flags); old_data_initialized = mftbmp_ni->initialized_size; read_unlock_irqrestore(&mftbmp_ni->size_lock, flags); if (old_data_initialized << 3 > ll && old_data_initialized > 3) { |
1da177e4c Linux-2.6.12-rc2 |
2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 |
bit = ll; if (bit < 24) bit = 24; if (unlikely(bit >= (1ll << 32))) goto max_err_out; ntfs_debug("Found free record (#2), bit 0x%llx.", (long long)bit); goto found_free_rec; } /* * The mft bitmap needs to be expanded until it covers the first unused * mft record that we can allocate. * Note: The smallest mft record we allocate is mft record 24. */ |
07a4e2da7 NTFS: Use i_size_... |
2304 |
bit = old_data_initialized << 3; |
1da177e4c Linux-2.6.12-rc2 |
2305 2306 |
if (unlikely(bit >= (1ll << 32))) goto max_err_out; |
07a4e2da7 NTFS: Use i_size_... |
2307 2308 |
read_lock_irqsave(&mftbmp_ni->size_lock, flags); old_data_size = mftbmp_ni->allocated_size; |
1da177e4c Linux-2.6.12-rc2 |
2309 2310 |
ntfs_debug("Status of mftbmp before extension: allocated_size 0x%llx, " "data_size 0x%llx, initialized_size 0x%llx.", |
07a4e2da7 NTFS: Use i_size_... |
2311 2312 2313 2314 2315 |
(long long)old_data_size, (long long)i_size_read(vol->mftbmp_ino), (long long)old_data_initialized); read_unlock_irqrestore(&mftbmp_ni->size_lock, flags); if (old_data_initialized + 8 > old_data_size) { |
1da177e4c Linux-2.6.12-rc2 |
2316 2317 2318 2319 2320 2321 2322 |
/* Need to extend bitmap by one more cluster. */ ntfs_debug("mftbmp: initialized_size + 8 > allocated_size."); err = ntfs_mft_bitmap_extend_allocation_nolock(vol); if (unlikely(err)) { up_write(&vol->mftbmp_lock); goto err_out; } |
07a4e2da7 NTFS: Use i_size_... |
2323 2324 |
#ifdef DEBUG read_lock_irqsave(&mftbmp_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
2325 2326 2327 2328 |
ntfs_debug("Status of mftbmp after allocation extension: " "allocated_size 0x%llx, data_size 0x%llx, " "initialized_size 0x%llx.", (long long)mftbmp_ni->allocated_size, |
07a4e2da7 NTFS: Use i_size_... |
2329 |
(long long)i_size_read(vol->mftbmp_ino), |
1da177e4c Linux-2.6.12-rc2 |
2330 |
(long long)mftbmp_ni->initialized_size); |
07a4e2da7 NTFS: Use i_size_... |
2331 2332 |
read_unlock_irqrestore(&mftbmp_ni->size_lock, flags); #endif /* DEBUG */ |
1da177e4c Linux-2.6.12-rc2 |
2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 |
} /* * We now have sufficient allocated space, extend the initialized_size * as well as the data_size if necessary and fill the new space with * zeroes. */ err = ntfs_mft_bitmap_extend_initialized_nolock(vol); if (unlikely(err)) { up_write(&vol->mftbmp_lock); goto err_out; } |
07a4e2da7 NTFS: Use i_size_... |
2344 2345 |
#ifdef DEBUG read_lock_irqsave(&mftbmp_ni->size_lock, flags); |
25985edce Fix common misspe... |
2346 |
ntfs_debug("Status of mftbmp after initialized extension: " |
1da177e4c Linux-2.6.12-rc2 |
2347 2348 2349 |
"allocated_size 0x%llx, data_size 0x%llx, " "initialized_size 0x%llx.", (long long)mftbmp_ni->allocated_size, |
07a4e2da7 NTFS: Use i_size_... |
2350 |
(long long)i_size_read(vol->mftbmp_ino), |
1da177e4c Linux-2.6.12-rc2 |
2351 |
(long long)mftbmp_ni->initialized_size); |
07a4e2da7 NTFS: Use i_size_... |
2352 2353 |
read_unlock_irqrestore(&mftbmp_ni->size_lock, flags); #endif /* DEBUG */ |
1da177e4c Linux-2.6.12-rc2 |
2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 |
ntfs_debug("Found free record (#3), bit 0x%llx.", (long long)bit); found_free_rec: /* @bit is the found free mft record, allocate it in the mft bitmap. */ ntfs_debug("At found_free_rec."); err = ntfs_bitmap_set_bit(vol->mftbmp_ino, bit); if (unlikely(err)) { ntfs_error(vol->sb, "Failed to allocate bit in mft bitmap."); up_write(&vol->mftbmp_lock); goto err_out; } ntfs_debug("Set bit 0x%llx in mft bitmap.", (long long)bit); have_alloc_rec: /* * The mft bitmap is now uptodate. Deal with mft data attribute now. * Note, we keep hold of the mft bitmap lock for writing until all * modifications to the mft data attribute are complete, too, as they * will impact decisions for mft bitmap and mft record allocation done * by a parallel allocation and if the lock is not maintained a * parallel allocation could allocate the same mft record as this one. */ ll = (bit + 1) << vol->mft_record_size_bits; |
07a4e2da7 NTFS: Use i_size_... |
2375 2376 2377 2378 |
read_lock_irqsave(&mft_ni->size_lock, flags); old_data_initialized = mft_ni->initialized_size; read_unlock_irqrestore(&mft_ni->size_lock, flags); if (ll <= old_data_initialized) { |
1da177e4c Linux-2.6.12-rc2 |
2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 |
ntfs_debug("Allocated mft record already initialized."); goto mft_rec_already_initialized; } ntfs_debug("Initializing allocated mft record."); /* * The mft record is outside the initialized data. Extend the mft data * attribute until it covers the allocated record. The loop is only * actually traversed more than once when a freshly formatted volume is * first written to so it optimizes away nicely in the common case. */ |
07a4e2da7 NTFS: Use i_size_... |
2389 |
read_lock_irqsave(&mft_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
2390 2391 2392 |
ntfs_debug("Status of mft data before extension: " "allocated_size 0x%llx, data_size 0x%llx, " "initialized_size 0x%llx.", |
3834c3f22 NTFS: Fix stupid ... |
2393 |
(long long)mft_ni->allocated_size, |
07a4e2da7 NTFS: Use i_size_... |
2394 |
(long long)i_size_read(vol->mft_ino), |
1da177e4c Linux-2.6.12-rc2 |
2395 |
(long long)mft_ni->initialized_size); |
3834c3f22 NTFS: Fix stupid ... |
2396 2397 |
while (ll > mft_ni->allocated_size) { read_unlock_irqrestore(&mft_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
2398 2399 2400 2401 2402 2403 |
err = ntfs_mft_data_extend_allocation_nolock(vol); if (unlikely(err)) { ntfs_error(vol->sb, "Failed to extend mft data " "allocation."); goto undo_mftbmp_alloc_nolock; } |
07a4e2da7 NTFS: Use i_size_... |
2404 |
read_lock_irqsave(&mft_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
2405 2406 2407 2408 |
ntfs_debug("Status of mft data after allocation extension: " "allocated_size 0x%llx, data_size 0x%llx, " "initialized_size 0x%llx.", (long long)mft_ni->allocated_size, |
07a4e2da7 NTFS: Use i_size_... |
2409 |
(long long)i_size_read(vol->mft_ino), |
1da177e4c Linux-2.6.12-rc2 |
2410 2411 |
(long long)mft_ni->initialized_size); } |
3834c3f22 NTFS: Fix stupid ... |
2412 |
read_unlock_irqrestore(&mft_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
2413 2414 2415 2416 2417 2418 2419 |
/* * Extend mft data initialized size (and data size of course) to reach * the allocated mft record, formatting the mft records allong the way. * Note: We only modify the ntfs_inode structure as that is all that is * needed by ntfs_mft_record_format(). We will update the attribute * record itself in one fell swoop later on. */ |
07a4e2da7 NTFS: Use i_size_... |
2420 |
write_lock_irqsave(&mft_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
2421 2422 2423 2424 2425 2426 2427 2428 |
old_data_initialized = mft_ni->initialized_size; old_data_size = vol->mft_ino->i_size; while (ll > mft_ni->initialized_size) { s64 new_initialized_size, mft_no; new_initialized_size = mft_ni->initialized_size + vol->mft_record_size; mft_no = mft_ni->initialized_size >> vol->mft_record_size_bits; |
07a4e2da7 NTFS: Use i_size_... |
2429 2430 2431 |
if (new_initialized_size > i_size_read(vol->mft_ino)) i_size_write(vol->mft_ino, new_initialized_size); write_unlock_irqrestore(&mft_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
2432 2433 2434 2435 2436 2437 2438 |
ntfs_debug("Initializing mft record 0x%llx.", (long long)mft_no); err = ntfs_mft_record_format(vol, mft_no); if (unlikely(err)) { ntfs_error(vol->sb, "Failed to format mft record."); goto undo_data_init; } |
07a4e2da7 NTFS: Use i_size_... |
2439 |
write_lock_irqsave(&mft_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
2440 2441 |
mft_ni->initialized_size = new_initialized_size; } |
07a4e2da7 NTFS: Use i_size_... |
2442 |
write_unlock_irqrestore(&mft_ni->size_lock, flags); |
c49c31115 [PATCH] fs/ntfs: ... |
2443 |
record_formatted = true; |
1da177e4c Linux-2.6.12-rc2 |
2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 |
/* Update the mft data attribute record to reflect the new sizes. */ m = map_mft_record(mft_ni); if (IS_ERR(m)) { ntfs_error(vol->sb, "Failed to map mft record."); err = PTR_ERR(m); goto undo_data_init; } ctx = ntfs_attr_get_search_ctx(mft_ni, m); if (unlikely(!ctx)) { ntfs_error(vol->sb, "Failed to get search context."); err = -ENOMEM; unmap_mft_record(mft_ni); goto undo_data_init; } err = ntfs_attr_lookup(mft_ni->type, mft_ni->name, mft_ni->name_len, CASE_SENSITIVE, 0, NULL, 0, ctx); if (unlikely(err)) { ntfs_error(vol->sb, "Failed to find first attribute extent of " "mft data attribute."); ntfs_attr_put_search_ctx(ctx); unmap_mft_record(mft_ni); goto undo_data_init; } a = ctx->attr; |
07a4e2da7 NTFS: Use i_size_... |
2468 |
read_lock_irqsave(&mft_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
2469 2470 |
a->data.non_resident.initialized_size = cpu_to_sle64(mft_ni->initialized_size); |
07a4e2da7 NTFS: Use i_size_... |
2471 2472 2473 |
a->data.non_resident.data_size = cpu_to_sle64(i_size_read(vol->mft_ino)); read_unlock_irqrestore(&mft_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
2474 2475 2476 2477 2478 |
/* Ensure the changes make it to disk. */ flush_dcache_mft_record_page(ctx->ntfs_ino); mark_mft_record_dirty(ctx->ntfs_ino); ntfs_attr_put_search_ctx(ctx); unmap_mft_record(mft_ni); |
07a4e2da7 NTFS: Use i_size_... |
2479 |
read_lock_irqsave(&mft_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
2480 2481 2482 2483 |
ntfs_debug("Status of mft data after mft record initialization: " "allocated_size 0x%llx, data_size 0x%llx, " "initialized_size 0x%llx.", (long long)mft_ni->allocated_size, |
07a4e2da7 NTFS: Use i_size_... |
2484 |
(long long)i_size_read(vol->mft_ino), |
1da177e4c Linux-2.6.12-rc2 |
2485 |
(long long)mft_ni->initialized_size); |
07a4e2da7 NTFS: Use i_size_... |
2486 2487 2488 |
BUG_ON(i_size_read(vol->mft_ino) > mft_ni->allocated_size); BUG_ON(mft_ni->initialized_size > i_size_read(vol->mft_ino)); read_unlock_irqrestore(&mft_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 |
mft_rec_already_initialized: /* * We can finally drop the mft bitmap lock as the mft data attribute * has been fully updated. The only disparity left is that the * allocated mft record still needs to be marked as in use to match the * set bit in the mft bitmap but this is actually not a problem since * this mft record is not referenced from anywhere yet and the fact * that it is allocated in the mft bitmap means that no-one will try to * allocate it either. */ up_write(&vol->mftbmp_lock); /* * We now have allocated and initialized the mft record. Calculate the * index of and the offset within the page cache page the record is in. */ |
09cbfeaf1 mm, fs: get rid o... |
2504 2505 |
index = bit << vol->mft_record_size_bits >> PAGE_SHIFT; ofs = (bit << vol->mft_record_size_bits) & ~PAGE_MASK; |
1da177e4c Linux-2.6.12-rc2 |
2506 2507 |
/* Read, map, and pin the page containing the mft record. */ page = ntfs_map_page(vol->mft_ino->i_mapping, index); |
801678c5a Remove duplicated... |
2508 |
if (IS_ERR(page)) { |
1da177e4c Linux-2.6.12-rc2 |
2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 |
ntfs_error(vol->sb, "Failed to map page containing allocated " "mft record 0x%llx.", (long long)bit); err = PTR_ERR(page); goto undo_mftbmp_alloc; } lock_page(page); BUG_ON(!PageUptodate(page)); ClearPageUptodate(page); m = (MFT_RECORD*)((u8*)page_address(page) + ofs); /* If we just formatted the mft record no need to do it again. */ if (!record_formatted) { /* Sanity check that the mft record is really not in use. */ if (ntfs_is_file_record(m->magic) && (m->flags & MFT_RECORD_IN_USE)) { ntfs_error(vol->sb, "Mft record 0x%llx was marked " "free in mft bitmap but is marked " "used itself. Corrupt filesystem. " "Unmount and run chkdsk.", (long long)bit); err = -EIO; SetPageUptodate(page); unlock_page(page); ntfs_unmap_page(page); NVolSetErrors(vol); goto undo_mftbmp_alloc; } /* * We need to (re-)format the mft record, preserving the * sequence number if it is not zero as well as the update * sequence number if it is not zero or -1 (0xffff). This * means we do not need to care whether or not something went * wrong with the previous mft record. */ seq_no = m->sequence_number; usn = *(le16*)((u8*)m + le16_to_cpu(m->usa_ofs)); err = ntfs_mft_record_layout(vol, bit, m); if (unlikely(err)) { ntfs_error(vol->sb, "Failed to layout allocated mft " "record 0x%llx.", (long long)bit); SetPageUptodate(page); unlock_page(page); ntfs_unmap_page(page); goto undo_mftbmp_alloc; } if (seq_no) m->sequence_number = seq_no; if (usn && le16_to_cpu(usn) != 0xffff) *(le16*)((u8*)m + le16_to_cpu(m->usa_ofs)) = usn; } /* Set the mft record itself in use. */ m->flags |= MFT_RECORD_IN_USE; if (S_ISDIR(mode)) m->flags |= MFT_RECORD_IS_DIRECTORY; flush_dcache_page(page); SetPageUptodate(page); if (base_ni) { |
af5eb745e NTFS: Fix invalid... |
2565 |
MFT_RECORD *m_tmp; |
1da177e4c Linux-2.6.12-rc2 |
2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 |
/* * Setup the base mft record in the extent mft record. This * completes initialization of the allocated extent mft record * and we can simply use it with map_extent_mft_record(). */ m->base_mft_record = MK_LE_MREF(base_ni->mft_no, base_ni->seq_no); /* * Allocate an extent inode structure for the new mft record, * attach it to the base inode @base_ni and map, pin, and lock * its, i.e. the allocated, mft record. */ |
af5eb745e NTFS: Fix invalid... |
2578 2579 |
m_tmp = map_extent_mft_record(base_ni, bit, &ni); if (IS_ERR(m_tmp)) { |
1da177e4c Linux-2.6.12-rc2 |
2580 2581 |
ntfs_error(vol->sb, "Failed to map allocated extent " "mft record 0x%llx.", (long long)bit); |
af5eb745e NTFS: Fix invalid... |
2582 |
err = PTR_ERR(m_tmp); |
1da177e4c Linux-2.6.12-rc2 |
2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 |
/* Set the mft record itself not in use. */ m->flags &= cpu_to_le16( ~le16_to_cpu(MFT_RECORD_IN_USE)); flush_dcache_page(page); /* Make sure the mft record is written out to disk. */ mark_ntfs_record_dirty(page, ofs); unlock_page(page); ntfs_unmap_page(page); goto undo_mftbmp_alloc; } |
af5eb745e NTFS: Fix invalid... |
2593 |
BUG_ON(m != m_tmp); |
1da177e4c Linux-2.6.12-rc2 |
2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 |
/* * Make sure the allocated mft record is written out to disk. * No need to set the inode dirty because the caller is going * to do that anyway after finishing with the new extent mft * record (e.g. at a minimum a new attribute will be added to * the mft record. */ mark_ntfs_record_dirty(page, ofs); unlock_page(page); /* * Need to unmap the page since map_extent_mft_record() mapped * it as well so we have it mapped twice at the moment. */ ntfs_unmap_page(page); } else { /* * Allocate a new VFS inode and set it up. NOTE: @vi->i_nlink * is set to 1 but the mft record->link_count is 0. The caller * needs to bear this in mind. */ vi = new_inode(vol->sb); if (unlikely(!vi)) { err = -ENOMEM; /* Set the mft record itself not in use. */ m->flags &= cpu_to_le16( ~le16_to_cpu(MFT_RECORD_IN_USE)); flush_dcache_page(page); /* Make sure the mft record is written out to disk. */ mark_ntfs_record_dirty(page, ofs); unlock_page(page); ntfs_unmap_page(page); goto undo_mftbmp_alloc; } vi->i_ino = bit; |
1da177e4c Linux-2.6.12-rc2 |
2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 |
/* The owner and group come from the ntfs volume. */ vi->i_uid = vol->uid; vi->i_gid = vol->gid; /* Initialize the ntfs specific part of @vi. */ ntfs_init_big_inode(vi); ni = NTFS_I(vi); /* * Set the appropriate mode, attribute type, and name. For * directories, also setup the index values to the defaults. */ if (S_ISDIR(mode)) { vi->i_mode = S_IFDIR | S_IRWXUGO; vi->i_mode &= ~vol->dmask; NInoSetMstProtected(ni); ni->type = AT_INDEX_ALLOCATION; ni->name = I30; ni->name_len = 4; ni->itype.index.block_size = 4096; |
b9a2838cc [PATCH] bitops: n... |
2650 |
ni->itype.index.block_size_bits = ntfs_ffs(4096) - 1; |
1da177e4c Linux-2.6.12-rc2 |
2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 |
ni->itype.index.collation_rule = COLLATION_FILE_NAME; if (vol->cluster_size <= ni->itype.index.block_size) { ni->itype.index.vcn_size = vol->cluster_size; ni->itype.index.vcn_size_bits = vol->cluster_size_bits; } else { ni->itype.index.vcn_size = vol->sector_size; ni->itype.index.vcn_size_bits = vol->sector_size_bits; } } else { vi->i_mode = S_IFREG | S_IRWXUGO; vi->i_mode &= ~vol->fmask; ni->type = AT_DATA; ni->name = NULL; ni->name_len = 0; } if (IS_RDONLY(vi)) vi->i_mode &= ~S_IWUGO; /* Set the inode times to the current time. */ vi->i_atime = vi->i_mtime = vi->i_ctime = |
c2050a454 fs: Replace curre... |
2674 |
current_time(vi); |
1da177e4c Linux-2.6.12-rc2 |
2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 |
/* * Set the file size to 0, the ntfs inode sizes are set to 0 by * the call to ntfs_init_big_inode() below. */ vi->i_size = 0; vi->i_blocks = 0; /* Set the sequence number. */ vi->i_generation = ni->seq_no = le16_to_cpu(m->sequence_number); /* * Manually map, pin, and lock the mft record as we already * have its page mapped and it is very easy to do. */ atomic_inc(&ni->count); |
4e5e529ad NTFS: Semaphore t... |
2689 |
mutex_lock(&ni->mrec_lock); |
1da177e4c Linux-2.6.12-rc2 |
2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 |
ni->page = page; ni->page_ofs = ofs; /* * Make sure the allocated mft record is written out to disk. * NOTE: We do not set the ntfs inode dirty because this would * fail in ntfs_write_inode() because the inode does not have a * standard information attribute yet. Also, there is no need * to set the inode dirty because the caller is going to do * that anyway after finishing with the new mft record (e.g. at * a minimum some new attributes will be added to the mft * record. */ mark_ntfs_record_dirty(page, ofs); unlock_page(page); /* Add the inode to the inode hash for the superblock. */ insert_inode_hash(vi); /* Update the default mft allocation position. */ vol->mft_data_pos = bit + 1; } /* * Return the opened, allocated inode of the allocated mft record as * well as the mapped, pinned, and locked mft record. */ ntfs_debug("Returning opened, allocated %sinode 0x%llx.", base_ni ? "extent " : "", (long long)bit); *mrec = m; return ni; undo_data_init: |
07a4e2da7 NTFS: Use i_size_... |
2720 |
write_lock_irqsave(&mft_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
2721 |
mft_ni->initialized_size = old_data_initialized; |
07a4e2da7 NTFS: Use i_size_... |
2722 2723 |
i_size_write(vol->mft_ino, old_data_size); write_unlock_irqrestore(&mft_ni->size_lock, flags); |
1da177e4c Linux-2.6.12-rc2 |
2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 |
goto undo_mftbmp_alloc_nolock; undo_mftbmp_alloc: down_write(&vol->mftbmp_lock); undo_mftbmp_alloc_nolock: if (ntfs_bitmap_clear_bit(vol->mftbmp_ino, bit)) { ntfs_error(vol->sb, "Failed to clear bit in mft bitmap.%s", es); NVolSetErrors(vol); } up_write(&vol->mftbmp_lock); err_out: return ERR_PTR(err); max_err_out: ntfs_warning(vol->sb, "Cannot allocate mft record because the maximum " "number of inodes (2^32) has already been reached."); up_write(&vol->mftbmp_lock); return ERR_PTR(-ENOSPC); } /** * ntfs_extent_mft_record_free - free an extent mft record on an ntfs volume * @ni: ntfs inode of the mapped extent mft record to free * @m: mapped extent mft record of the ntfs inode @ni * * Free the mapped extent mft record @m of the extent ntfs inode @ni. * * Note that this function unmaps the mft record and closes and destroys @ni * internally and hence you cannot use either @ni nor @m any more after this * function returns success. * * On success return 0 and on error return -errno. @ni and @m are still valid * in this case and have not been freed. * * For some errors an error message is displayed and the success code 0 is * returned and the volume is then left dirty on umount. This makes sense in * case we could not rollback the changes that were already done since the * caller no longer wants to reference this mft record so it does not matter to * the caller if something is wrong with it as long as it is properly detached * from the base inode. */ int ntfs_extent_mft_record_free(ntfs_inode *ni, MFT_RECORD *m) { unsigned long mft_no = ni->mft_no; ntfs_volume *vol = ni->vol; ntfs_inode *base_ni; ntfs_inode **extent_nis; int i, err; le16 old_seq_no; u16 seq_no; BUG_ON(NInoAttr(ni)); BUG_ON(ni->nr_extents != -1); |
4e5e529ad NTFS: Semaphore t... |
2775 |
mutex_lock(&ni->extent_lock); |
1da177e4c Linux-2.6.12-rc2 |
2776 |
base_ni = ni->ext.base_ntfs_ino; |
4e5e529ad NTFS: Semaphore t... |
2777 |
mutex_unlock(&ni->extent_lock); |
1da177e4c Linux-2.6.12-rc2 |
2778 2779 2780 2781 2782 2783 |
BUG_ON(base_ni->nr_extents <= 0); ntfs_debug("Entering for extent inode 0x%lx, base inode 0x%lx. ", mft_no, base_ni->mft_no); |
4e5e529ad NTFS: Semaphore t... |
2784 |
mutex_lock(&base_ni->extent_lock); |
1da177e4c Linux-2.6.12-rc2 |
2785 2786 2787 2788 2789 |
/* Make sure we are holding the only reference to the extent inode. */ if (atomic_read(&ni->count) > 2) { ntfs_error(vol->sb, "Tried to free busy extent inode 0x%lx, " "not freeing.", base_ni->mft_no); |
4e5e529ad NTFS: Semaphore t... |
2790 |
mutex_unlock(&base_ni->extent_lock); |
1da177e4c Linux-2.6.12-rc2 |
2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 |
return -EBUSY; } /* Dissociate the ntfs inode from the base inode. */ extent_nis = base_ni->ext.extent_ntfs_inos; err = -ENOENT; for (i = 0; i < base_ni->nr_extents; i++) { if (ni != extent_nis[i]) continue; extent_nis += i; base_ni->nr_extents--; memmove(extent_nis, extent_nis + 1, (base_ni->nr_extents - i) * sizeof(ntfs_inode*)); err = 0; break; } |
4e5e529ad NTFS: Semaphore t... |
2807 |
mutex_unlock(&base_ni->extent_lock); |
1da177e4c Linux-2.6.12-rc2 |
2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 |
if (unlikely(err)) { ntfs_error(vol->sb, "Extent inode 0x%lx is not attached to " "its base inode 0x%lx.", mft_no, base_ni->mft_no); BUG(); } /* * The extent inode is no longer attached to the base inode so no one * can get a reference to it any more. */ /* Mark the mft record as not in use. */ |
63cd88542 ntfs: remove priv... |
2822 |
m->flags &= ~MFT_RECORD_IN_USE; |
1da177e4c Linux-2.6.12-rc2 |
2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 |
/* Increment the sequence number, skipping zero, if it is not zero. */ old_seq_no = m->sequence_number; seq_no = le16_to_cpu(old_seq_no); if (seq_no == 0xffff) seq_no = 1; else if (seq_no) seq_no++; m->sequence_number = cpu_to_le16(seq_no); /* * Set the ntfs inode dirty and write it out. We do not need to worry * about the base inode here since whatever caused the extent mft * record to be freed is guaranteed to do it already. */ NInoSetDirty(ni); err = write_mft_record(ni, m, 0); if (unlikely(err)) { ntfs_error(vol->sb, "Failed to write mft record 0x%lx, not " "freeing.", mft_no); goto rollback; } rollback_error: /* Unmap and throw away the now freed extent inode. */ unmap_extent_mft_record(ni); ntfs_clear_extent_inode(ni); /* Clear the bit in the $MFT/$BITMAP corresponding to this record. */ down_write(&vol->mftbmp_lock); err = ntfs_bitmap_clear_bit(vol->mftbmp_ino, mft_no); up_write(&vol->mftbmp_lock); if (unlikely(err)) { /* * The extent inode is gone but we failed to deallocate it in * the mft bitmap. Just emit a warning and leave the volume * dirty on umount. */ ntfs_error(vol->sb, "Failed to clear bit in mft bitmap.%s", es); NVolSetErrors(vol); } return 0; rollback: /* Rollback what we did... */ |
4e5e529ad NTFS: Semaphore t... |
2866 |
mutex_lock(&base_ni->extent_lock); |
1da177e4c Linux-2.6.12-rc2 |
2867 2868 2869 |
extent_nis = base_ni->ext.extent_ntfs_inos; if (!(base_ni->nr_extents & 3)) { int new_size = (base_ni->nr_extents + 4) * sizeof(ntfs_inode*); |
f52720ca5 [PATCH] fs: Remov... |
2870 |
extent_nis = kmalloc(new_size, GFP_NOFS); |
1da177e4c Linux-2.6.12-rc2 |
2871 2872 2873 |
if (unlikely(!extent_nis)) { ntfs_error(vol->sb, "Failed to allocate internal " "buffer during rollback.%s", es); |
4e5e529ad NTFS: Semaphore t... |
2874 |
mutex_unlock(&base_ni->extent_lock); |
1da177e4c Linux-2.6.12-rc2 |
2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 |
NVolSetErrors(vol); goto rollback_error; } if (base_ni->nr_extents) { BUG_ON(!base_ni->ext.extent_ntfs_inos); memcpy(extent_nis, base_ni->ext.extent_ntfs_inos, new_size - 4 * sizeof(ntfs_inode*)); kfree(base_ni->ext.extent_ntfs_inos); } base_ni->ext.extent_ntfs_inos = extent_nis; } m->flags |= MFT_RECORD_IN_USE; m->sequence_number = old_seq_no; extent_nis[base_ni->nr_extents++] = ni; |
4e5e529ad NTFS: Semaphore t... |
2889 |
mutex_unlock(&base_ni->extent_lock); |
1da177e4c Linux-2.6.12-rc2 |
2890 2891 2892 2893 |
mark_mft_record_dirty(ni); return err; } #endif /* NTFS_RW */ |