diff options
Diffstat (limited to 'fs/ocfs2/buffer_head_io.c')
| -rw-r--r-- | fs/ocfs2/buffer_head_io.c | 47 |
1 files changed, 35 insertions, 12 deletions
diff --git a/fs/ocfs2/buffer_head_io.c b/fs/ocfs2/buffer_head_io.c index 7e947c67246..15c8e6deee2 100644 --- a/fs/ocfs2/buffer_head_io.c +++ b/fs/ocfs2/buffer_head_io.c @@ -39,6 +39,18 @@ #include "buffer_head_io.h" +/* + * Bits on bh->b_state used by ocfs2. + * + * These MUST be after the JBD2 bits. Hence, we use BH_JBDPrivateStart. + */ +enum ocfs2_state_bits { + BH_NeedsValidate = BH_JBDPrivateStart, +}; + +/* Expand the magic b_state functions */ +BUFFER_FNS(NeedsValidate, needs_validate); + int ocfs2_write_block(struct ocfs2_super *osb, struct buffer_head *bh, struct inode *inode) { @@ -112,7 +124,7 @@ int ocfs2_read_blocks_sync(struct ocfs2_super *osb, u64 block, bh = bhs[i]; if (buffer_jbd(bh)) { - mlog(ML_ERROR, + mlog(ML_BH_IO, "trying to sync read a jbd " "managed bh (blocknr = %llu), skipping\n", (unsigned long long)bh->b_blocknr); @@ -147,15 +159,10 @@ int ocfs2_read_blocks_sync(struct ocfs2_super *osb, u64 block, for (i = nr; i > 0; i--) { bh = bhs[i - 1]; - if (buffer_jbd(bh)) { - mlog(ML_ERROR, - "the journal got the buffer while it was " - "locked for io! (blocknr = %llu)\n", - (unsigned long long)bh->b_blocknr); - BUG(); - } + /* No need to wait on the buffer if it's managed by JBD. */ + if (!buffer_jbd(bh)) + wait_on_buffer(bh); - wait_on_buffer(bh); if (!buffer_uptodate(bh)) { /* Status won't be cleared from here on out, * so we can safely record this and loop back @@ -171,7 +178,9 @@ bail: } int ocfs2_read_blocks(struct inode *inode, u64 block, int nr, - struct buffer_head *bhs[], int flags) + struct buffer_head *bhs[], int flags, + int (*validate)(struct super_block *sb, + struct buffer_head *bh)) { int status = 0; int i, ignore_cache = 0; @@ -251,8 +260,6 @@ int ocfs2_read_blocks(struct inode *inode, u64 block, int nr, ignore_cache = 1; } - /* XXX: Can we ever get this and *not* have the cached - * flag set? */ if (buffer_jbd(bh)) { if (ignore_cache) mlog(ML_BH_IO, "trying to sync read a jbd " @@ -305,6 +312,8 @@ int ocfs2_read_blocks(struct inode *inode, u64 block, int nr, clear_buffer_uptodate(bh); get_bh(bh); /* for end_buffer_read_sync() */ + if (validate) + set_buffer_needs_validate(bh); bh->b_end_io = end_buffer_read_sync; submit_bh(READ, bh); continue; @@ -335,6 +344,20 @@ int ocfs2_read_blocks(struct inode *inode, u64 block, int nr, bhs[i] = NULL; continue; } + + if (buffer_needs_validate(bh)) { + /* We never set NeedsValidate if the + * buffer was held by the journal, so + * that better not have changed */ + BUG_ON(buffer_jbd(bh)); + clear_buffer_needs_validate(bh); + status = validate(inode->i_sb, bh); + if (status) { + put_bh(bh); + bhs[i] = NULL; + continue; + } + } } /* Always set the buffer in the cache, even if it was |