| ext2_balloc.c (96752) | ext2_balloc.c (96877) |
|---|---|
| 1/* 2 * modified for Lites 1.1 3 * 4 * Aug 1995, Godmar Back (gback@cs.utah.edu) 5 * University of Utah, Department of Computer Science 6 */ 7/* 8 * Copyright (c) 1982, 1986, 1989, 1993 --- 23 unchanged lines hidden (view full) --- 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)ffs_balloc.c 8.4 (Berkeley) 9/23/93 | 1/* 2 * modified for Lites 1.1 3 * 4 * Aug 1995, Godmar Back (gback@cs.utah.edu) 5 * University of Utah, Department of Computer Science 6 */ 7/* 8 * Copyright (c) 1982, 1986, 1989, 1993 --- 23 unchanged lines hidden (view full) --- 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)ffs_balloc.c 8.4 (Berkeley) 9/23/93 |
| 40 * $FreeBSD: head/sys/gnu/fs/ext2fs/ext2_balloc.c 96752 2002-05-16 19:43:28Z iedowse $ | 40 * $FreeBSD: head/sys/gnu/fs/ext2fs/ext2_balloc.c 96877 2002-05-18 19:12:38Z iedowse $ |
| 41 */ 42 43#include <sys/param.h> 44#include <sys/systm.h> 45#include <sys/bio.h> 46#include <sys/buf.h> 47#include <sys/lock.h> 48#include <sys/ucred.h> --- 8 unchanged lines hidden (view full) --- 57/* 58 * Balloc defines the structure of file system storage 59 * by allocating the physical blocks on a device given 60 * the inode and the logical block number in a file. 61 */ 62int 63ext2_balloc(ip, bn, size, cred, bpp, flags) 64 struct inode *ip; | 41 */ 42 43#include <sys/param.h> 44#include <sys/systm.h> 45#include <sys/bio.h> 46#include <sys/buf.h> 47#include <sys/lock.h> 48#include <sys/ucred.h> --- 8 unchanged lines hidden (view full) --- 57/* 58 * Balloc defines the structure of file system storage 59 * by allocating the physical blocks on a device given 60 * the inode and the logical block number in a file. 61 */ 62int 63ext2_balloc(ip, bn, size, cred, bpp, flags) 64 struct inode *ip; |
| 65 daddr_t bn; | 65 int32_t bn; |
| 66 int size; 67 struct ucred *cred; 68 struct buf **bpp; 69 int flags; 70{ 71 struct ext2_sb_info *fs; | 66 int size; 67 struct ucred *cred; 68 struct buf **bpp; 69 int flags; 70{ 71 struct ext2_sb_info *fs; |
| 72 daddr_t nb; | 72 int32_t nb; |
| 73 struct buf *bp, *nbp; 74 struct vnode *vp = ITOV(ip); 75 struct indir indirs[NIADDR + 2]; | 73 struct buf *bp, *nbp; 74 struct vnode *vp = ITOV(ip); 75 struct indir indirs[NIADDR + 2]; |
| 76 daddr_t newb, lbn, *bap, pref; | 76 int32_t newb, lbn, *bap, pref; |
| 77 int osize, nsize, num, i, error; 78/* 79ext2_debug("ext2_balloc called (%d, %d, %d)\n", 80 ip->i_number, (int)bn, (int)size); 81*/ 82 *bpp = NULL; 83 if (bn < 0) 84 return (EFBIG); --- 84 unchanged lines hidden (view full) --- 169#endif 170 /* 171 * Fetch the first indirect block allocating if necessary. 172 */ 173 --num; 174 nb = ip->i_ib[indirs[0].in_off]; 175 if (nb == 0) { 176#if 0 | 77 int osize, nsize, num, i, error; 78/* 79ext2_debug("ext2_balloc called (%d, %d, %d)\n", 80 ip->i_number, (int)bn, (int)size); 81*/ 82 *bpp = NULL; 83 if (bn < 0) 84 return (EFBIG); --- 84 unchanged lines hidden (view full) --- 169#endif 170 /* 171 * Fetch the first indirect block allocating if necessary. 172 */ 173 --num; 174 nb = ip->i_ib[indirs[0].in_off]; 175 if (nb == 0) { 176#if 0 |
| 177 pref = ext2_blkpref(ip, lbn, 0, (daddr_t *)0, 0); | 177 pref = ext2_blkpref(ip, lbn, 0, (int32_t *)0, 0); |
| 178#else 179 /* see the comment by ext2_blkpref. What we do here is 180 to pretend that it'd be good for a block holding indirect 181 pointers to be allocated near its predecessor in terms 182 of indirection, or the last direct block. 183 We shamelessly exploit the fact that i_ib immediately 184 follows i_db. 185 Godmar thinks it make sense to allocate i_ib[0] immediately --- 27 unchanged lines hidden (view full) --- 213 */ 214 for (i = 1;;) { 215 error = bread(vp, 216 indirs[i].in_lbn, (int)fs->s_blocksize, NOCRED, &bp); 217 if (error) { 218 brelse(bp); 219 return (error); 220 } | 178#else 179 /* see the comment by ext2_blkpref. What we do here is 180 to pretend that it'd be good for a block holding indirect 181 pointers to be allocated near its predecessor in terms 182 of indirection, or the last direct block. 183 We shamelessly exploit the fact that i_ib immediately 184 follows i_db. 185 Godmar thinks it make sense to allocate i_ib[0] immediately --- 27 unchanged lines hidden (view full) --- 213 */ 214 for (i = 1;;) { 215 error = bread(vp, 216 indirs[i].in_lbn, (int)fs->s_blocksize, NOCRED, &bp); 217 if (error) { 218 brelse(bp); 219 return (error); 220 } |
| 221 bap = (daddr_t *)bp->b_data; | 221 bap = (int32_t *)bp->b_data; |
| 222 nb = bap[indirs[i].in_off]; 223 if (i == num) 224 break; 225 i += 1; 226 if (nb != 0) { 227 brelse(bp); 228 continue; 229 } 230 if (pref == 0) 231#if 1 232 /* see the comment above and by ext2_blkpref 233 * I think this implements Linux policy, but 234 * does it really make sense to allocate to 235 * block containing pointers together ? 236 * Also, will it ever succeed ? 237 */ 238 pref = ext2_blkpref(ip, lbn, indirs[i].in_off, bap, 239 bp->b_lblkno); 240#else | 222 nb = bap[indirs[i].in_off]; 223 if (i == num) 224 break; 225 i += 1; 226 if (nb != 0) { 227 brelse(bp); 228 continue; 229 } 230 if (pref == 0) 231#if 1 232 /* see the comment above and by ext2_blkpref 233 * I think this implements Linux policy, but 234 * does it really make sense to allocate to 235 * block containing pointers together ? 236 * Also, will it ever succeed ? 237 */ 238 pref = ext2_blkpref(ip, lbn, indirs[i].in_off, bap, 239 bp->b_lblkno); 240#else |
| 241 pref = ext2_blkpref(ip, lbn, 0, (daddr_t *)0, 0); | 241 pref = ext2_blkpref(ip, lbn, 0, (int32_t *)0, 0); |
| 242#endif 243 if ((error = 244 ext2_alloc(ip, lbn, pref, (int)fs->s_blocksize, cred, &newb)) != 0) { 245 brelse(bp); 246 return (error); 247 } 248 nb = newb; 249 nbp = getblk(vp, indirs[i].in_lbn, fs->s_blocksize, 0, 0); --- 65 unchanged lines hidden --- | 242#endif 243 if ((error = 244 ext2_alloc(ip, lbn, pref, (int)fs->s_blocksize, cred, &newb)) != 0) { 245 brelse(bp); 246 return (error); 247 } 248 nb = newb; 249 nbp = getblk(vp, indirs[i].in_lbn, fs->s_blocksize, 0, 0); --- 65 unchanged lines hidden --- |