jfs_extent.c (185a257f2f73bcd89050ad02da5bedbc28fc43fa) jfs_extent.c (4d81715fc5dfa1680ad47d7edf3ac4a74c5bf104)
1/*
2 * Copyright (C) International Business Machines Corp., 2000-2004
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *

--- 60 unchanged lines hidden (view full) ---

69 * PARAMETERS:
70 * ip - the inode of the file.
71 * xlen - requested extent length.
72 * pno - the starting page number with the file.
73 * xp - pointer to an xad. on entry, xad describes an
74 * extent that is used as an allocation hint if the
75 * xaddr of the xad is non-zero. on successful exit,
76 * the xad describes the newly allocated extent.
1/*
2 * Copyright (C) International Business Machines Corp., 2000-2004
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *

--- 60 unchanged lines hidden (view full) ---

69 * PARAMETERS:
70 * ip - the inode of the file.
71 * xlen - requested extent length.
72 * pno - the starting page number with the file.
73 * xp - pointer to an xad. on entry, xad describes an
74 * extent that is used as an allocation hint if the
75 * xaddr of the xad is non-zero. on successful exit,
76 * the xad describes the newly allocated extent.
77 * abnr - boolean_t indicating whether the newly allocated extent
77 * abnr - bool indicating whether the newly allocated extent
78 * should be marked as allocated but not recorded.
79 *
80 * RETURN VALUES:
81 * 0 - success
82 * -EIO - i/o error.
83 * -ENOSPC - insufficient disk resources.
84 */
85int
78 * should be marked as allocated but not recorded.
79 *
80 * RETURN VALUES:
81 * 0 - success
82 * -EIO - i/o error.
83 * -ENOSPC - insufficient disk resources.
84 */
85int
86extAlloc(struct inode *ip, s64 xlen, s64 pno, xad_t * xp, boolean_t abnr)
86extAlloc(struct inode *ip, s64 xlen, s64 pno, xad_t * xp, bool abnr)
87{
88 struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb);
89 s64 nxlen, nxaddr, xoff, hint, xaddr = 0;
90 int rc;
91 int xflag;
92
93 /* This blocks if we are low on resources */
94 txBeginAnon(ip->i_sb);

--- 17 unchanged lines hidden (view full) ---

112 * immediately previous to the current allocation
113 * request and if hint extent has the same abnr
114 * value as the current request. if so, we can
115 * extend the hint extent to include the current
116 * extent if we can allocate the blocks immediately
117 * following the hint extent.
118 */
119 if (offsetXAD(xp) + nxlen == xoff &&
87{
88 struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb);
89 s64 nxlen, nxaddr, xoff, hint, xaddr = 0;
90 int rc;
91 int xflag;
92
93 /* This blocks if we are low on resources */
94 txBeginAnon(ip->i_sb);

--- 17 unchanged lines hidden (view full) ---

112 * immediately previous to the current allocation
113 * request and if hint extent has the same abnr
114 * value as the current request. if so, we can
115 * extend the hint extent to include the current
116 * extent if we can allocate the blocks immediately
117 * following the hint extent.
118 */
119 if (offsetXAD(xp) + nxlen == xoff &&
120 abnr == ((xp->flag & XAD_NOTRECORDED) ? TRUE : FALSE))
120 abnr == ((xp->flag & XAD_NOTRECORDED) ? true : false))
121 xaddr = hint + nxlen;
122
123 /* adjust the hint to the last block of the extent */
124 hint += (nxlen - 1);
125 }
126
127 /* allocate the disk blocks for the extent. initially, extBalloc()
128 * will try to allocate disk blocks for the requested size (xlen).

--- 14 unchanged lines hidden (view full) ---

143 /* Allocate blocks to quota. */
144 if (DQUOT_ALLOC_BLOCK(ip, nxlen)) {
145 dbFree(ip, nxaddr, (s64) nxlen);
146 mutex_unlock(&JFS_IP(ip)->commit_mutex);
147 return -EDQUOT;
148 }
149
150 /* determine the value of the extent flag */
121 xaddr = hint + nxlen;
122
123 /* adjust the hint to the last block of the extent */
124 hint += (nxlen - 1);
125 }
126
127 /* allocate the disk blocks for the extent. initially, extBalloc()
128 * will try to allocate disk blocks for the requested size (xlen).

--- 14 unchanged lines hidden (view full) ---

143 /* Allocate blocks to quota. */
144 if (DQUOT_ALLOC_BLOCK(ip, nxlen)) {
145 dbFree(ip, nxaddr, (s64) nxlen);
146 mutex_unlock(&JFS_IP(ip)->commit_mutex);
147 return -EDQUOT;
148 }
149
150 /* determine the value of the extent flag */
151 xflag = (abnr == TRUE) ? XAD_NOTRECORDED : 0;
151 xflag = abnr ? XAD_NOTRECORDED : 0;
152
153 /* if we can extend the hint extent to cover the current request,
154 * extend it. otherwise, insert a new extent to
155 * cover the current request.
156 */
157 if (xaddr && xaddr == nxaddr)
158 rc = xtExtend(0, ip, xoff, (int) nxlen, 0);
159 else

--- 38 unchanged lines hidden (view full) ---

198 * partial back last page.
199 *
200 * PARAMETERS:
201 * ip - the inode of the file.
202 * cp - cbuf for the partial backed last page.
203 * xlen - request size of the resulting extent.
204 * xp - pointer to an xad. on successful exit, the xad
205 * describes the newly allocated extent.
152
153 /* if we can extend the hint extent to cover the current request,
154 * extend it. otherwise, insert a new extent to
155 * cover the current request.
156 */
157 if (xaddr && xaddr == nxaddr)
158 rc = xtExtend(0, ip, xoff, (int) nxlen, 0);
159 else

--- 38 unchanged lines hidden (view full) ---

198 * partial back last page.
199 *
200 * PARAMETERS:
201 * ip - the inode of the file.
202 * cp - cbuf for the partial backed last page.
203 * xlen - request size of the resulting extent.
204 * xp - pointer to an xad. on successful exit, the xad
205 * describes the newly allocated extent.
206 * abnr - boolean_t indicating whether the newly allocated extent
206 * abnr - bool indicating whether the newly allocated extent
207 * should be marked as allocated but not recorded.
208 *
209 * RETURN VALUES:
210 * 0 - success
211 * -EIO - i/o error.
212 * -ENOSPC - insufficient disk resources.
213 */
207 * should be marked as allocated but not recorded.
208 *
209 * RETURN VALUES:
210 * 0 - success
211 * -EIO - i/o error.
212 * -ENOSPC - insufficient disk resources.
213 */
214int extRealloc(struct inode *ip, s64 nxlen, xad_t * xp, boolean_t abnr)
214int extRealloc(struct inode *ip, s64 nxlen, xad_t * xp, bool abnr)
215{
216 struct super_block *sb = ip->i_sb;
217 s64 xaddr, xlen, nxaddr, delta, xoff;
218 s64 ntail, nextend, ninsert;
219 int rc, nbperpage = JFS_SBI(sb)->nbperpage;
220 int xflag;
221
222 /* This blocks if we are low on resources */

--- 248 unchanged lines hidden (view full) ---

471 s64 blkno = offsetXAD(xp) >> ip->i_blkbits;
472
473// assert(ISSPARSE(ip));
474
475 /* initialize the extent allocation hint */
476 XADaddress(xp, 0);
477
478 /* allocate an extent to fill the hole */
215{
216 struct super_block *sb = ip->i_sb;
217 s64 xaddr, xlen, nxaddr, delta, xoff;
218 s64 ntail, nextend, ninsert;
219 int rc, nbperpage = JFS_SBI(sb)->nbperpage;
220 int xflag;
221
222 /* This blocks if we are low on resources */

--- 248 unchanged lines hidden (view full) ---

471 s64 blkno = offsetXAD(xp) >> ip->i_blkbits;
472
473// assert(ISSPARSE(ip));
474
475 /* initialize the extent allocation hint */
476 XADaddress(xp, 0);
477
478 /* allocate an extent to fill the hole */
479 if ((rc = extAlloc(ip, nbperpage, blkno, xp, FALSE)))
479 if ((rc = extAlloc(ip, nbperpage, blkno, xp, false)))
480 return (rc);
481
482 assert(lengthPXD(xp) == nbperpage);
483
484 return (0);
485}
486#endif /* _NOTYET */
487

--- 176 unchanged lines hidden --- 		480 return (rc);
481
482 assert(lengthPXD(xp) == nbperpage);
483
484 return (0);
485}
486#endif /* _NOTYET */
487

--- 176 unchanged lines hidden ---