2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
10 #include <afsconfig.h>
11 #include "afs/param.h"
14 #ifdef AFS_LINUX24_ENV
15 #include "h/module.h" /* early to avoid printf->printk mapping */
17 #include "afs/sysincludes.h" /* Standard vendor system headers */
18 #include "afsincludes.h" /* Afs-based standard headers */
19 #include "afs/afs_stats.h" /* afs statistics */
20 #include "h/smp_lock.h"
21 #if defined(AFS_LINUX26_ENV)
24 #if defined(LINUX_USE_FH)
25 #include "h/exportfs.h"
26 int cache_fh_type = -1;
27 int cache_fh_len = -1;
30 afs_lock_t afs_xosi; /* lock is for tvattr */
31 extern struct osi_dev cacheDev;
32 #if defined(AFS_LINUX24_ENV)
33 extern struct vfsmount *afs_cacheMnt;
35 extern struct super_block *afs_cacheSBp;
37 #if defined(AFS_LINUX26_ENV)
39 osi_UFSOpen(afs_dcache_id_t *ainode)
41 struct osi_file *afile = NULL;
42 extern int cacheDiskType;
43 struct inode *tip = NULL;
44 struct dentry *dp = NULL;
45 struct file *filp = NULL;
47 AFS_STATCNT(osi_UFSOpen);
48 if (cacheDiskType != AFS_FCACHE_TYPE_UFS) {
49 osi_Panic("UFSOpen called for non-UFS cache\n");
51 if (!afs_osicred_initialized) {
52 /* valid for alpha_osf, SunOS, Ultrix */
53 memset((char *)&afs_osi_cred, 0, sizeof(struct AFS_UCRED));
54 crhold(&afs_osi_cred); /* don't let it evaporate, since it is static */
55 afs_osicred_initialized = 1;
57 afile = (struct osi_file *)osi_AllocLargeSpace(sizeof(struct osi_file));
60 osi_Panic("osi_UFSOpen: Failed to allocate %d bytes for osi_file.\n",
61 (int)sizeof(struct osi_file));
63 memset(afile, 0, sizeof(struct osi_file));
64 #if !defined(LINUX_USE_FH)
65 tip = iget(afs_cacheSBp, ainode->ufs);
67 osi_Panic("Can't get inode %d\n", ainode->ufs);
69 dp = d_alloc_anon(tip);
71 dp = afs_cacheSBp->s_export_op->fh_to_dentry(afs_cacheSBp, &ainode->ufs.fh, cache_fh_len, cache_fh_type);
73 osi_Panic("Can't get dentry\n");
76 tip->i_flags |= MS_NOATIME; /* Disable updating access times. */
78 #if defined(STRUCT_TASK_HAS_CRED)
79 filp = dentry_open(dp, mntget(afs_cacheMnt), O_RDWR, current_cred());
81 filp = dentry_open(dp, mntget(afs_cacheMnt), O_RDWR);
84 #if defined(LINUX_USE_FH)
85 osi_Panic("Can't open file\n");
87 osi_Panic("Can't open inode %d\n", ainode->ufs);
90 afile->size = i_size_read(FILE_INODE(filp));
93 afile->proc = (int (*)())0;
94 afile->inum = tip->i_ino; /* for hint validity checking */
99 osi_UFSOpen(afs_dcache_id_t *ainode)
101 register struct osi_file *afile = NULL;
102 extern int cacheDiskType;
104 struct inode *tip = NULL;
105 struct file *filp = NULL;
106 AFS_STATCNT(osi_UFSOpen);
107 if (cacheDiskType != AFS_FCACHE_TYPE_UFS) {
108 osi_Panic("UFSOpen called for non-UFS cache\n");
110 if (!afs_osicred_initialized) {
111 /* valid for alpha_osf, SunOS, Ultrix */
112 memset((char *)&afs_osi_cred, 0, sizeof(struct AFS_UCRED));
113 crhold(&afs_osi_cred); /* don't let it evaporate, since it is static */
114 afs_osicred_initialized = 1;
116 afile = (struct osi_file *)osi_AllocLargeSpace(sizeof(struct osi_file));
119 osi_Panic("osi_UFSOpen: Failed to allocate %d bytes for osi_file.\n",
120 sizeof(struct osi_file));
122 memset(afile, 0, sizeof(struct osi_file));
124 filp->f_dentry = &afile->dentry;
125 tip = iget(afs_cacheSBp, ainode->ufs);
127 osi_Panic("Can't get inode %d\n", ainode->ufs);
128 FILE_INODE(filp) = tip;
129 tip->i_flags |= MS_NOATIME; /* Disable updating access times. */
130 filp->f_flags = O_RDWR;
131 #if defined(AFS_LINUX24_ENV)
132 filp->f_mode = FMODE_READ|FMODE_WRITE;
133 filp->f_op = fops_get(tip->i_fop);
135 filp->f_op = tip->i_op->default_file_ops;
137 if (filp->f_op && filp->f_op->open)
138 code = filp->f_op->open(tip, filp);
140 osi_Panic("Can't open inode %d\n", ainode->ufs);
141 afile->size = i_size_read(tip);
144 afile->proc = (int (*)())0;
145 afile->inum = ainode->ufs; /* for hint validity checking */
146 return (void *)afile;
150 #if defined(LINUX_USE_FH)
152 * Given a dentry, return the file handle as encoded by the filesystem.
153 * We can't assume anything about the length (words, not bytes).
154 * The cache has to live on a single filesystem with uniform file
155 * handles, otherwise we panic.
157 void osi_get_fh(struct dentry *dp, afs_ufs_dcache_id_t *ainode) {
161 if (cache_fh_len > 0)
162 max_len = cache_fh_len;
164 max_len = MAX_FH_LEN;
165 if (dp->d_sb->s_export_op->encode_fh) {
166 type = dp->d_sb->s_export_op->encode_fh(dp, &ainode->raw[0], &max_len, 0);
168 osi_Panic("File handle encoding failed\n");
170 if (cache_fh_type < 0)
171 cache_fh_type = type;
172 if (cache_fh_len < 0) {
173 cache_fh_len = max_len;
175 if (type != cache_fh_type || max_len != cache_fh_len) {
176 osi_Panic("Inconsistent file handles within cache\n");
179 /* If fs doesn't provide an encode_fh method, assume the default INO32 type */
180 if (cache_fh_type < 0)
181 cache_fh_type = FILEID_INO32_GEN;
182 if (cache_fh_len < 0)
183 cache_fh_len = sizeof(struct fid)/4;
184 ainode->fh.i32.ino = dp->d_inode->i_ino;
185 ainode->fh.i32.gen = dp->d_inode->i_generation;
189 void osi_get_fh(struct dentry *dp, afs_ufs_dcache_id_t *ainode) {
190 *ainode = dp->d_inode->i_ino;
195 afs_osi_Stat(register struct osi_file *afile, register struct osi_stat *astat)
197 register afs_int32 code;
198 AFS_STATCNT(osi_Stat);
199 MObtainWriteLock(&afs_xosi, 320);
200 astat->size = i_size_read(OSIFILE_INODE(afile));
201 #if defined(AFS_LINUX26_ENV)
202 astat->mtime = OSIFILE_INODE(afile)->i_mtime.tv_sec;
203 astat->atime = OSIFILE_INODE(afile)->i_atime.tv_sec;
205 astat->mtime = OSIFILE_INODE(afile)->i_mtime;
206 astat->atime = OSIFILE_INODE(afile)->i_atime;
209 MReleaseWriteLock(&afs_xosi);
213 #ifdef AFS_LINUX26_ENV
215 osi_UFSClose(register struct osi_file *afile)
217 AFS_STATCNT(osi_Close);
219 if (OSIFILE_INODE(afile)) {
220 filp_close(afile->filp, NULL);
224 osi_FreeLargeSpace(afile);
229 osi_UFSClose(register struct osi_file *afile)
231 AFS_STATCNT(osi_Close);
233 if (FILE_INODE(&afile->file)) {
234 struct file *filp = &afile->file;
235 if (filp->f_op && filp->f_op->release)
236 filp->f_op->release(FILE_INODE(filp), filp);
237 iput(FILE_INODE(filp));
241 osi_FreeLargeSpace(afile);
247 osi_UFSTruncate(register struct osi_file *afile, afs_int32 asize)
249 register afs_int32 code;
250 struct osi_stat tstat;
251 struct iattr newattrs;
252 struct inode *inode = OSIFILE_INODE(afile);
253 AFS_STATCNT(osi_Truncate);
255 /* This routine only shrinks files, and most systems
256 * have very slow truncates, even when the file is already
257 * small enough. Check now and save some time.
259 code = afs_osi_Stat(afile, &tstat);
260 if (code || tstat.size <= asize)
262 MObtainWriteLock(&afs_xosi, 321);
264 #ifdef STRUCT_INODE_HAS_I_ALLOC_SEM
265 down_write(&inode->i_alloc_sem);
267 #ifdef STRUCT_INODE_HAS_I_MUTEX
268 mutex_lock(&inode->i_mutex);
272 newattrs.ia_size = asize;
273 newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
274 #if defined(AFS_LINUX24_ENV)
275 newattrs.ia_ctime = CURRENT_TIME;
277 /* avoid notify_change() since it wants to update dentry->d_parent */
279 code = inode_change_ok(inode, &newattrs);
281 #ifdef INODE_SETATTR_NOT_VOID
282 #if defined(AFS_LINUX26_ENV)
283 if (inode->i_op && inode->i_op->setattr)
284 code = inode->i_op->setattr(afile->filp->f_dentry, &newattrs);
287 code = inode_setattr(inode, &newattrs);
289 inode_setattr(inode, &newattrs);
293 truncate_inode_pages(&inode->i_data, asize);
295 i_size_write(inode, asize);
296 if (inode->i_sb->s_op && inode->i_sb->s_op->notify_change) {
297 code = inode->i_sb->s_op->notify_change(&afile->dentry, &newattrs);
300 truncate_inode_pages(inode, asize);
301 if (inode->i_op && inode->i_op->truncate)
302 inode->i_op->truncate(inode);
306 #ifdef STRUCT_INODE_HAS_I_MUTEX
307 mutex_unlock(&inode->i_mutex);
311 #ifdef STRUCT_INODE_HAS_I_ALLOC_SEM
312 up_write(&inode->i_alloc_sem);
315 MReleaseWriteLock(&afs_xosi);
320 /* Generic read interface */
322 afs_osi_Read(register struct osi_file *afile, int offset, void *aptr,
329 AFS_STATCNT(osi_Read);
332 * If the osi_file passed in is NULL, panic only if AFS is not shutting
333 * down. No point in crashing when we are already shutting down
336 if (!afs_shuttingdown)
337 osi_Panic("osi_Read called with null param");
343 afile->offset = offset;
344 setup_uio(&auio, &iov, aptr, afile->offset, asize, UIO_READ, AFS_UIOSYS);
346 code = osi_rdwr(afile, &auio, UIO_READ);
349 code = asize - auio.uio_resid;
350 afile->offset += code;
352 afs_Trace2(afs_iclSetp, CM_TRACE_READFAILED, ICL_TYPE_INT32, auio.uio_resid,
353 ICL_TYPE_INT32, code);
359 /* Generic write interface */
361 afs_osi_Write(register struct osi_file *afile, afs_int32 offset, void *aptr,
368 AFS_STATCNT(osi_Write);
371 if (!afs_shuttingdown)
372 osi_Panic("afs_osi_Write called with null param");
378 afile->offset = offset;
379 setup_uio(&auio, &iov, aptr, afile->offset, asize, UIO_WRITE, AFS_UIOSYS);
381 code = osi_rdwr(afile, &auio, UIO_WRITE);
384 code = asize - auio.uio_resid;
385 afile->offset += code;
389 ("\n\n\n*** Cache partition is FULL - Decrease cachesize!!! ***\n\n");
394 (*afile->proc)(afile, code);
400 /* This work should be handled by physstrat in ca/machdep.c.
401 This routine written from the RT NFS port strategy routine.
402 It has been generalized a bit, but should still be pretty clear. */
404 afs_osi_MapStrategy(int (*aproc) (struct buf * bp), register struct buf *bp)
406 afs_int32 returnCode;
408 AFS_STATCNT(osi_MapStrategy);
409 returnCode = (*aproc) (bp);
415 shutdown_osifile(void)
417 AFS_STATCNT(shutdown_osifile);
418 if (afs_cold_shutdown) {
419 afs_osicred_initialized = 0;
423 /* Intialize cache device info and fragment size for disk cache partition. */
425 osi_InitCacheInfo(char *aname)
428 extern afs_dcache_id_t cacheInode;
430 extern struct osi_dev cacheDev;
431 extern afs_int32 afs_fsfragsize;
432 extern struct super_block *afs_cacheSBp;
433 extern struct vfsmount *afs_cacheMnt;
434 code = osi_lookupname_internal(aname, 1, &afs_cacheMnt, &dp);
438 osi_get_fh(dp, &cacheInode.ufs);
439 cacheDev.dev = dp->d_inode->i_sb->s_dev;
440 afs_fsfragsize = dp->d_inode->i_sb->s_blocksize - 1;
441 afs_cacheSBp = dp->d_inode->i_sb;
449 #define FOP_READ(F, B, C) (F)->f_op->read(F, B, (size_t)(C), &(F)->f_pos)
450 #define FOP_WRITE(F, B, C) (F)->f_op->write(F, B, (size_t)(C), &(F)->f_pos)
453 * seek, then read or write to an open inode. addrp points to data in
457 osi_rdwr(struct osi_file *osifile, uio_t * uiop, int rw)
459 #ifdef AFS_LINUX26_ENV
460 struct file *filp = osifile->filp;
462 struct file *filp = &osifile->file;
468 unsigned long savelim;
470 savelim = current->TASK_STRUCT_RLIM[RLIMIT_FSIZE].rlim_cur;
471 current->TASK_STRUCT_RLIM[RLIMIT_FSIZE].rlim_cur = RLIM_INFINITY;
473 if (uiop->uio_seg == AFS_UIOSYS)
476 /* seek to the desired position. Return -1 on error. */
477 if (filp->f_op->llseek) {
478 if (filp->f_op->llseek(filp, (loff_t) uiop->uio_offset, 0) != uiop->uio_offset)
481 filp->f_pos = uiop->uio_offset;
483 while (code == 0 && uiop->uio_resid > 0 && uiop->uio_iovcnt > 0) {
485 count = iov->iov_len;
493 code = FOP_READ(filp, iov->iov_base, count);
495 code = FOP_WRITE(filp, iov->iov_base, count);
500 } else if (code == 0) {
502 * This is bad -- we can't read any more data from the
503 * file, but we have no good way of signaling a partial
510 iov->iov_base += code;
511 iov->iov_len -= code;
512 uiop->uio_resid -= code;
513 uiop->uio_offset += code;
517 if (uiop->uio_seg == AFS_UIOSYS)
520 current->TASK_STRUCT_RLIM[RLIMIT_FSIZE].rlim_cur = savelim;
526 * Setup a uio struct.
529 setup_uio(uio_t * uiop, struct iovec *iovecp, const char *buf, afs_offs_t pos,
530 int count, uio_flag_t flag, uio_seg_t seg)
532 iovecp->iov_base = (char *)buf;
533 iovecp->iov_len = count;
534 uiop->uio_iov = iovecp;
535 uiop->uio_iovcnt = 1;
536 uiop->uio_offset = pos;
538 uiop->uio_resid = count;
539 uiop->uio_flag = flag;
544 * UIO_READ : dp -> uio
545 * UIO_WRITE : uio -> dp
548 uiomove(char *dp, int length, uio_flag_t rw, uio_t * uiop)
554 while (length > 0 && uiop->uio_resid > 0 && uiop->uio_iovcnt > 0) {
556 count = iov->iov_len;
567 switch (uiop->uio_seg) {
571 memcpy(iov->iov_base, dp, count);
574 memcpy(dp, iov->iov_base, count);
577 printf("uiomove: Bad rw = %d\n", rw);
584 AFS_COPYOUT(dp, iov->iov_base, count, code);
587 AFS_COPYIN(iov->iov_base, dp, count, code);
590 printf("uiomove: Bad rw = %d\n", rw);
595 printf("uiomove: Bad seg = %d\n", uiop->uio_seg);
601 iov->iov_base += count;
602 iov->iov_len -= count;
603 uiop->uio_offset += count;
604 uiop->uio_resid -= count;