diff options
Diffstat (limited to 'fs/ntfs/compress.c')
| -rw-r--r-- | fs/ntfs/compress.c | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/fs/ntfs/compress.c b/fs/ntfs/compress.c index 25d24106f89..f82498c35e7 100644 --- a/fs/ntfs/compress.c +++ b/fs/ntfs/compress.c @@ -25,6 +25,7 @@ #include <linux/buffer_head.h> #include <linux/blkdev.h> #include <linux/vmalloc.h> +#include <linux/slab.h> #include "attrib.h" #include "inode.h" @@ -57,7 +58,7 @@ typedef enum { /** * ntfs_compression_buffer - one buffer for the decompression engine */ -static u8 *ntfs_compression_buffer = NULL; +static u8 *ntfs_compression_buffer; /** * ntfs_cb_lock - spinlock which protects ntfs_compression_buffer @@ -67,7 +68,7 @@ static DEFINE_SPINLOCK(ntfs_cb_lock); /** * allocate_compression_buffers - allocate the decompression buffers * - * Caller has to hold the ntfs_lock semaphore. + * Caller has to hold the ntfs_lock mutex. * * Return 0 on success or -ENOMEM if the allocations failed. */ @@ -84,7 +85,7 @@ int allocate_compression_buffers(void) /** * free_compression_buffers - free the decompression buffers * - * Caller has to hold the ntfs_lock semaphore. + * Caller has to hold the ntfs_lock mutex. */ void free_compression_buffers(void) { @@ -500,7 +501,7 @@ int ntfs_read_compressed_block(struct page *page) VCN start_vcn = (((s64)index << PAGE_CACHE_SHIFT) & ~cb_size_mask) >> vol->cluster_size_bits; /* - * The first vcn after the last wanted vcn (minumum alignment is again + * The first vcn after the last wanted vcn (minimum alignment is again * PAGE_CACHE_SIZE. */ VCN end_vcn = ((((s64)(index + 1UL) << PAGE_CACHE_SHIFT) + cb_size - 1) @@ -561,6 +562,16 @@ int ntfs_read_compressed_block(struct page *page) read_unlock_irqrestore(&ni->size_lock, flags); max_page = ((i_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT) - offset; + /* Is the page fully outside i_size? (truncate in progress) */ + if (xpage >= max_page) { + kfree(bhs); + kfree(pages); + zero_user(page, 0, PAGE_CACHE_SIZE); + ntfs_debug("Compressed read outside i_size - truncated?"); + SetPageUptodate(page); + unlock_page(page); + return 0; + } if (nr_pages < max_page) max_page = nr_pages; for (i = 0; i < max_page; i++, offset++) { @@ -600,7 +611,7 @@ do_next_cb: rl = NULL; for (vcn = start_vcn, start_vcn += cb_clusters; vcn < start_vcn; vcn++) { - BOOL is_retry = FALSE; + bool is_retry = false; if (!rl) { lock_retry_remap: @@ -626,7 +637,7 @@ lock_retry_remap: break; if (is_retry || lcn != LCN_RL_NOT_MAPPED) goto rl_err; - is_retry = TRUE; + is_retry = true; /* * Attempt to map runlist, dropping lock for the * duration. @@ -655,7 +666,7 @@ lock_retry_remap: for (i = 0; i < nr_bhs; i++) { struct buffer_head *tbh = bhs[i]; - if (unlikely(test_set_buffer_locked(tbh))) + if (!trylock_buffer(tbh)) continue; if (unlikely(buffer_uptodate(tbh))) { unlock_buffer(tbh); @@ -687,8 +698,7 @@ lock_retry_remap: "uptodate! Unplugging the disk queue " "and rescheduling."); get_bh(tbh); - blk_run_address_space(mapping); - schedule(); + io_schedule(); put_bh(tbh); if (unlikely(!buffer_uptodate(tbh))) goto read_err; @@ -917,7 +927,7 @@ lock_retry_remap: return 0; ntfs_debug("Failed. Returning error code %s.", err == -EOVERFLOW ? - "EOVERFLOW" : (!err ? "EIO" : "unkown error")); + "EOVERFLOW" : (!err ? "EIO" : "unknown error")); return err < 0 ? err : -EIO; read_err: |