diff options
Diffstat (limited to 'fs/xfs/xfs_rtalloc.c')
| -rw-r--r-- | fs/xfs/xfs_rtalloc.c | 211 |
1 files changed, 71 insertions, 140 deletions
diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c index 35380d0cfe9b..a810482339ad 100644 --- a/fs/xfs/xfs_rtalloc.c +++ b/fs/xfs/xfs_rtalloc.c @@ -156,17 +156,17 @@ xfs_rtallocate_range( * properly update the summary. */ error = xfs_rtfind_back(args, start, 0, &preblock); - if (error) { + if (error) return error; - } + /* * Find the next allocated block (end of free extent). */ error = xfs_rtfind_forw(args, end, mp->m_sb.sb_rextents - 1, &postblock); - if (error) { + if (error) return error; - } + /* * Decrement the summary information corresponding to the entire * (old) free extent. @@ -174,9 +174,9 @@ xfs_rtallocate_range( error = xfs_rtmodify_summary(args, XFS_RTBLOCKLOG(postblock + 1 - preblock), xfs_rtx_to_rbmblock(mp, preblock), -1); - if (error) { + if (error) return error; - } + /* * If there are blocks not being allocated at the front of the * old extent, add summary data for them to be free. @@ -185,10 +185,10 @@ xfs_rtallocate_range( error = xfs_rtmodify_summary(args, XFS_RTBLOCKLOG(start - preblock), xfs_rtx_to_rbmblock(mp, preblock), 1); - if (error) { + if (error) return error; - } } + /* * If there are blocks not being allocated at the end of the * old extent, add summary data for them to be free. @@ -197,15 +197,14 @@ xfs_rtallocate_range( error = xfs_rtmodify_summary(args, XFS_RTBLOCKLOG(postblock - end), xfs_rtx_to_rbmblock(mp, end + 1), 1); - if (error) { + if (error) return error; - } } + /* * Modify the bitmap to mark this extent allocated. */ - error = xfs_rtmodify_range(args, start, len, 0); - return error; + return xfs_rtmodify_range(args, start, len, 0); } /* @@ -267,17 +266,17 @@ xfs_rtallocate_extent_block( * If it's not so then next will contain the first non-free. */ error = xfs_rtcheck_range(args, i, maxlen, 1, &next, &stat); - if (error) { + if (error) return error; - } + if (stat) { /* * i for maxlen is all free, allocate and return that. */ error = xfs_rtallocate_range(args, i, maxlen); - if (error) { + if (error) return error; - } + *len = maxlen; *rtx = i; return 0; @@ -302,9 +301,8 @@ xfs_rtallocate_extent_block( */ if (next < end) { error = xfs_rtfind_forw(args, next, end, &i); - if (error) { + if (error) return error; - } } else break; } @@ -327,9 +325,8 @@ xfs_rtallocate_extent_block( * Allocate besti for bestlen & return that. */ error = xfs_rtallocate_range(args, besti, bestlen); - if (error) { + if (error) return error; - } *len = bestlen; *rtx = besti; return 0; @@ -338,8 +335,7 @@ xfs_rtallocate_extent_block( * Allocation failed. Set *nextp to the next block to try. */ *nextp = next; - *rtx = NULLRTEXTNO; - return 0; + return -ENOSPC; } /* @@ -369,17 +365,16 @@ xfs_rtallocate_extent_exact( * Check if the range in question (for maxlen) is free. */ error = xfs_rtcheck_range(args, start, maxlen, 1, &next, &isfree); - if (error) { + if (error) return error; - } + if (isfree) { /* * If it is, allocate it and return success. */ error = xfs_rtallocate_range(args, start, maxlen); - if (error) { + if (error) return error; - } *len = maxlen; *rtx = start; return 0; @@ -388,33 +383,23 @@ xfs_rtallocate_extent_exact( * If not, allocate what there is, if it's at least minlen. */ maxlen = next - start; - if (maxlen < minlen) { - /* - * Failed, return failure status. - */ - *rtx = NULLRTEXTNO; - return 0; - } + if (maxlen < minlen) + return -ENOSPC; + /* * Trim off tail of extent, if prod is specified. */ if (prod > 1 && (i = maxlen % prod)) { maxlen -= i; - if (maxlen < minlen) { - /* - * Now we can't do it, return failure status. - */ - *rtx = NULLRTEXTNO; - return 0; - } + if (maxlen < minlen) + return -ENOSPC; } /* * Allocate what we can and return it. */ error = xfs_rtallocate_range(args, start, maxlen); - if (error) { + if (error) return error; - } *len = maxlen; *rtx = start; return 0; @@ -443,7 +428,6 @@ xfs_rtallocate_extent_near( int j; /* secondary loop control */ int log2len; /* log2 of minlen */ xfs_rtxnum_t n; /* next rtext to try */ - xfs_rtxnum_t r; /* result rtext */ ASSERT(minlen % prod == 0); ASSERT(maxlen % prod == 0); @@ -457,26 +441,18 @@ xfs_rtallocate_extent_near( /* Make sure we don't run off the end of the rt volume. */ maxlen = xfs_rtallocate_clamp_len(mp, start, maxlen, prod); - if (maxlen < minlen) { - *rtx = NULLRTEXTNO; - return 0; - } + if (maxlen < minlen) + return -ENOSPC; /* * Try the exact allocation first. */ error = xfs_rtallocate_extent_exact(args, start, minlen, maxlen, len, - prod, &r); - if (error) { + prod, rtx); + if (error != -ENOSPC) return error; - } - /* - * If the exact allocation worked, return that. - */ - if (r != NULLRTEXTNO) { - *rtx = r; - return 0; - } + + bbno = xfs_rtx_to_rbmblock(mp, start); i = 0; j = -1; @@ -492,9 +468,9 @@ xfs_rtallocate_extent_near( */ error = xfs_rtany_summary(args, log2len, mp->m_rsumlevels - 1, bbno + i, &maxlog); - if (error) { + if (error) return error; - } + /* * If there are any useful extents starting here, try * allocating one. @@ -513,17 +489,9 @@ xfs_rtallocate_extent_near( */ error = xfs_rtallocate_extent_block(args, bbno + i, minlen, maxavail, len, - &n, prod, &r); - if (error) { + &n, prod, rtx); + if (error != -ENOSPC) return error; - } - /* - * If it worked, return it. - */ - if (r != NULLRTEXTNO) { - *rtx = r; - return 0; - } } /* * On the negative side of the starting location. @@ -557,17 +525,9 @@ xfs_rtallocate_extent_near( error = xfs_rtallocate_extent_block(args, bbno + j, minlen, maxavail, len, &n, prod, - &r); - if (error) { + rtx); + if (error != -ENOSPC) return error; - } - /* - * If it works, return the extent. - */ - if (r != NULLRTEXTNO) { - *rtx = r; - return 0; - } } } } @@ -601,8 +561,7 @@ xfs_rtallocate_extent_near( else break; } - *rtx = NULLRTEXTNO; - return 0; + return -ENOSPC; } /* @@ -624,7 +583,6 @@ xfs_rtallocate_extent_size( xfs_fileoff_t i; /* bitmap block number */ int l; /* level number (loop control) */ xfs_rtxnum_t n; /* next rtext to be tried */ - xfs_rtxnum_t r; /* result rtext number */ xfs_suminfo_t sum; /* summary information for extents */ ASSERT(minlen % prod == 0); @@ -647,9 +605,8 @@ xfs_rtallocate_extent_size( * Get the summary for this level/block. */ error = xfs_rtget_summary(args, l, i, &sum); - if (error) { + if (error) return error; - } /* * Nothing there, on to the next block. */ @@ -659,17 +616,9 @@ xfs_rtallocate_extent_size( * Try allocating the extent. */ error = xfs_rtallocate_extent_block(args, i, maxlen, - maxlen, len, &n, prod, &r); - if (error) { + maxlen, len, &n, prod, rtx); + if (error != -ENOSPC) return error; - } - /* - * If it worked, return that. - */ - if (r != NULLRTEXTNO) { - *rtx = r; - return 0; - } /* * If the "next block to try" returned from the * allocator is beyond the next bitmap block, @@ -683,10 +632,8 @@ xfs_rtallocate_extent_size( * Didn't find any maxlen blocks. Try smaller ones, unless * we're asking for a fixed size extent. */ - if (minlen > --maxlen) { - *rtx = NULLRTEXTNO; - return 0; - } + if (minlen > --maxlen) + return -ENOSPC; ASSERT(minlen != 0); ASSERT(maxlen != 0); @@ -705,9 +652,9 @@ xfs_rtallocate_extent_size( * Get the summary information for this level/block. */ error = xfs_rtget_summary(args, l, i, &sum); - if (error) { + if (error) return error; - } + /* * If nothing there, go on to next. */ @@ -721,17 +668,10 @@ xfs_rtallocate_extent_size( error = xfs_rtallocate_extent_block(args, i, XFS_RTMAX(minlen, 1 << l), XFS_RTMIN(maxlen, (1 << (l + 1)) - 1), - len, &n, prod, &r); - if (error) { + len, &n, prod, rtx); + if (error != -ENOSPC) return error; - } - /* - * If it worked, return that extent. - */ - if (r != NULLRTEXTNO) { - *rtx = r; - return 0; - } + /* * If the "next block to try" returned from the * allocator is beyond the next bitmap block, @@ -744,8 +684,7 @@ xfs_rtallocate_extent_size( /* * Got nothing, return failure. */ - *rtx = NULLRTEXTNO; - return 0; + return -ENOSPC; } /* @@ -1182,14 +1121,13 @@ xfs_rtallocate_extent( xfs_rtxlen_t *len, /* out: actual length allocated */ int wasdel, /* was a delayed allocation extent */ xfs_rtxlen_t prod, /* extent product factor */ - xfs_rtxnum_t *rtblock) /* out: start rtext allocated */ + xfs_rtxnum_t *rtx) /* out: start rtext allocated */ { struct xfs_rtalloc_args args = { .mp = tp->t_mountp, .tp = tp, }; int error; /* error value */ - xfs_rtxnum_t r; /* result allocated rtext */ ASSERT(xfs_isilocked(args.mp->m_rbmip, XFS_ILOCK_EXCL)); ASSERT(minlen > 0 && minlen <= maxlen); @@ -1204,42 +1142,35 @@ xfs_rtallocate_extent( maxlen -= i; if ((i = minlen % prod)) minlen += prod - i; - if (maxlen < minlen) { - *rtblock = NULLRTEXTNO; - return 0; - } + if (maxlen < minlen) + return -ENOSPC; } retry: if (start == 0) { error = xfs_rtallocate_extent_size(&args, minlen, - maxlen, len, prod, &r); + maxlen, len, prod, rtx); } else { error = xfs_rtallocate_extent_near(&args, start, minlen, - maxlen, len, prod, &r); + maxlen, len, prod, rtx); } - xfs_rtbuf_cache_relse(&args); - if (error) + if (error) { + if (error == -ENOSPC && prod > 1) { + prod = 1; + goto retry; + } return error; + } /* * If it worked, update the superblock. */ - if (r != NULLRTEXTNO) { - long slen = (long)*len; - - ASSERT(*len >= minlen && *len <= maxlen); - if (wasdel) - xfs_trans_mod_sb(tp, XFS_TRANS_SB_RES_FREXTENTS, -slen); - else - xfs_trans_mod_sb(tp, XFS_TRANS_SB_FREXTENTS, -slen); - } else if (prod > 1) { - prod = 1; - goto retry; - } - - *rtblock = r; + ASSERT(*len >= minlen && *len <= maxlen); + if (wasdel) + xfs_trans_mod_sb(tp, XFS_TRANS_SB_RES_FREXTENTS, -(long)*len); + else + xfs_trans_mod_sb(tp, XFS_TRANS_SB_FREXTENTS, -(long)*len); return 0; } @@ -1553,16 +1484,16 @@ retry: raminlen = max_t(xfs_rtxlen_t, 1, xfs_extlen_to_rtxlen(mp, minlen)); error = xfs_rtallocate_extent(ap->tp, rtx, raminlen, ralen, &ralen, ap->wasdel, prod, &rtx); - if (error) - return error; - - if (rtx != NULLRTEXTNO) { + if (!error) { ap->blkno = xfs_rtx_to_rtb(mp, rtx); ap->length = xfs_rtxlen_to_extlen(mp, ralen); xfs_bmap_alloc_account(ap); return 0; } + if (error != -ENOSPC) + return error; + if (align > mp->m_sb.sb_rextsize) { /* * We previously enlarged the request length to try to satisfy |