diff options
Diffstat (limited to 'fs/gfs2')
| -rw-r--r-- | fs/gfs2/bmap.c | 74 | ||||
| -rw-r--r-- | fs/gfs2/file.c | 2 |
2 files changed, 43 insertions, 33 deletions
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index ed6699705c13..33ee93344d18 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -750,6 +750,7 @@ static int gfs2_iomap_alloc(struct inode *inode, struct iomap *iomap, } } while (iomap->addr == IOMAP_NULL_ADDR); + iomap->type = IOMAP_MAPPED; iomap->length = (u64)dblks << inode->i_blkbits; ip->i_height = mp->mp_fheight; gfs2_add_inode_blocks(&ip->i_inode, alloced); @@ -759,17 +760,6 @@ out: return ret; } -static void gfs2_stuffed_iomap(struct inode *inode, struct iomap *iomap) -{ - struct gfs2_inode *ip = GFS2_I(inode); - - iomap->addr = (ip->i_no_addr << inode->i_blkbits) + - sizeof(struct gfs2_dinode); - iomap->offset = 0; - iomap->length = i_size_read(inode); - iomap->type = IOMAP_INLINE; -} - #define IOMAP_F_GFS2_BOUNDARY IOMAP_F_PRIVATE /** @@ -789,37 +779,61 @@ static int gfs2_iomap_get(struct inode *inode, loff_t pos, loff_t length, { struct gfs2_inode *ip = GFS2_I(inode); struct gfs2_sbd *sdp = GFS2_SB(inode); + loff_t size = i_size_read(inode); __be64 *ptr; sector_t lblock; sector_t lblock_stop; int ret; int eob; u64 len; - struct buffer_head *bh; + struct buffer_head *dibh = NULL, *bh; u8 height; if (!length) return -EINVAL; + down_read(&ip->i_rw_mutex); + + ret = gfs2_meta_inode_buffer(ip, &dibh); + if (ret) + goto unlock; + if (gfs2_is_stuffed(ip)) { - if (flags & IOMAP_REPORT) { - if (pos >= i_size_read(inode)) - return -ENOENT; - gfs2_stuffed_iomap(inode, iomap); - return 0; + if (flags & IOMAP_WRITE) { + loff_t max_size = gfs2_max_stuffed_size(ip); + + if (pos + length > max_size) + goto unstuff; + iomap->length = max_size; + } else { + if (pos >= size) { + if (flags & IOMAP_REPORT) { + ret = -ENOENT; + goto unlock; + } else { + /* report a hole */ + iomap->offset = pos; + iomap->length = length; + goto do_alloc; + } + } + iomap->length = size; } - BUG_ON(!(flags & IOMAP_WRITE)); + iomap->addr = (ip->i_no_addr << inode->i_blkbits) + + sizeof(struct gfs2_dinode); + iomap->type = IOMAP_INLINE; + goto out; } + +unstuff: lblock = pos >> inode->i_blkbits; iomap->offset = lblock << inode->i_blkbits; lblock_stop = (pos + length - 1) >> inode->i_blkbits; len = lblock_stop - lblock + 1; + iomap->length = len << inode->i_blkbits; - down_read(&ip->i_rw_mutex); - - ret = gfs2_meta_inode_buffer(ip, &mp->mp_bh[0]); - if (ret) - goto unlock; + get_bh(dibh); + mp->mp_bh[0] = dibh; height = ip->i_height; while ((lblock + 1) * sdp->sd_sb.sb_bsize > sdp->sd_heightsize[height]) @@ -853,21 +867,23 @@ out: iomap->bdev = inode->i_sb->s_bdev; unlock: up_read(&ip->i_rw_mutex); + if (dibh) + brelse(dibh); return ret; do_alloc: iomap->addr = IOMAP_NULL_ADDR; - iomap->length = len << inode->i_blkbits; iomap->type = IOMAP_HOLE; - iomap->flags = 0; if (flags & IOMAP_REPORT) { - loff_t size = i_size_read(inode); if (pos >= size) ret = -ENOENT; else if (height == ip->i_height) ret = gfs2_hole_size(inode, lblock, len, mp, iomap); else iomap->length = size - pos; + } else if (!(flags & IOMAP_WRITE)) { + if (pos < size && height == ip->i_height) + ret = gfs2_hole_size(inode, lblock, len, mp, iomap); } goto out; } @@ -941,12 +957,6 @@ int gfs2_block_map(struct inode *inode, sector_t lblock, } else { ret = gfs2_iomap_get(inode, pos, length, 0, &iomap, &mp); release_metapath(&mp); - - /* Return unmapped buffer beyond the end of file. */ - if (ret == -ENOENT) { - ret = 0; - goto out; - } } if (ret) goto out; diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c index 7137db7b0119..6f6bbfbff13d 100644 --- a/fs/gfs2/file.c +++ b/fs/gfs2/file.c @@ -754,7 +754,7 @@ static int fallocate_chunk(struct inode *inode, loff_t offset, loff_t len, if (error) goto out; offset = iomap.offset + iomap.length; - if (iomap.type != IOMAP_HOLE) + if (!(iomap.flags & IOMAP_F_NEW)) continue; error = sb_issue_zeroout(sb, iomap.addr >> inode->i_blkbits, iomap.length >> inode->i_blkbits, |