Changeset View
Changeset View
Standalone View
Standalone View
sys/fs/ext2fs/ext2_balloc.c
| Context not available. | |||||
| #include <fs/ext2fs/ext2_extern.h> | #include <fs/ext2fs/ext2_extern.h> | ||||
| #include <fs/ext2fs/ext2_mount.h> | #include <fs/ext2fs/ext2_mount.h> | ||||
| static int | |||||
| ext2_ext_balloc(struct inode *ip, uint32_t lbn, int size, | |||||
| struct ucred *cred, struct buf **bpp, int flags) | |||||
| { | |||||
| struct m_ext2fs *fs; | |||||
| struct buf *bp = NULL; | |||||
| struct vnode *vp = ITOV(ip); | |||||
| uint32_t nb; | |||||
| int osize, nsize, blks, error, allocated; | |||||
| fs = ip->i_e2fs; | |||||
| blks = howmany(size, fs->e2fs_bsize); | |||||
| error = ext4_ext_get_blocks(ip, lbn, blks, cred, NULL, &allocated, &nb); | |||||
| if (error) | |||||
| return (error); | |||||
| if (allocated) { | |||||
| if (ip->i_size < (lbn + 1) * fs->e2fs_bsize) | |||||
| nsize = fragroundup(fs, size); | |||||
| else | |||||
| nsize = fs->e2fs_bsize; | |||||
| bp = getblk(vp, lbn, nsize, 0, 0, 0); | |||||
| if(!bp) | |||||
| return (EIO); | |||||
| bp->b_blkno = fsbtodb(fs, nb); | |||||
| if (flags & BA_CLRBUF) | |||||
| vfs_bio_clrbuf(bp); | |||||
| } else { | |||||
| if (ip->i_size >= (lbn + 1) * fs->e2fs_bsize) { | |||||
| error = bread(vp, lbn, fs->e2fs_bsize, NOCRED, &bp); | |||||
| if (error) { | |||||
| brelse(bp); | |||||
| return (error); | |||||
| } | |||||
| bp->b_blkno = fsbtodb(fs, nb); | |||||
| *bpp = bp; | |||||
| return (0); | |||||
| } | |||||
| /* | |||||
| * Consider need to reallocate a fragment. | |||||
| */ | |||||
| osize = fragroundup(fs, blkoff(fs, ip->i_size)); | |||||
| nsize = fragroundup(fs, size); | |||||
| if (nsize <= osize) { | |||||
| error = bread(vp, lbn, osize, NOCRED, &bp); | |||||
| if (error) { | |||||
| brelse(bp); | |||||
| return (error); | |||||
| } | |||||
| bp->b_blkno = fsbtodb(fs, nb); | |||||
| } else { | |||||
| error = bread(vp, lbn, fs->e2fs_bsize, NOCRED, &bp); | |||||
| if (error) { | |||||
| brelse(bp); | |||||
| return (error); | |||||
| } | |||||
| bp->b_blkno = fsbtodb(fs, nb); | |||||
| } | |||||
| } | |||||
| *bpp = bp; | |||||
| return (error); | |||||
| } | |||||
| /* | /* | ||||
| * Balloc defines the structure of filesystem storage | * Balloc defines the structure of filesystem storage | ||||
| * by allocating the physical blocks on a device given | * by allocating the physical blocks on a device given | ||||
| Context not available. | |||||
| ip->i_next_alloc_block++; | ip->i_next_alloc_block++; | ||||
| ip->i_next_alloc_goal++; | ip->i_next_alloc_goal++; | ||||
| } | } | ||||
| if (ip->i_flag & IN_E4EXTENTS) | |||||
| return (ext2_ext_balloc(ip, lbn, size, cred, bpp, flags)); | |||||
| /* | /* | ||||
| * The first EXT2_NDADDR blocks are direct blocks | * The first EXT2_NDADDR blocks are direct blocks | ||||
| */ | */ | ||||
| Context not available. | |||||