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 afs_linux_raw_open(afs_dcache_id_t *ainode)
41 struct inode *tip = NULL;
42 struct dentry *dp = NULL;
45 #if !defined(LINUX_USE_FH)
46 tip = iget(afs_cacheSBp, ainode->ufs);
48 osi_Panic("Can't get inode %d\n", (int) ainode->ufs);
50 dp = d_alloc_anon(tip);
52 dp = afs_cacheSBp->s_export_op->fh_to_dentry(afs_cacheSBp, &ainode->ufs.fh,
53 cache_fh_len, cache_fh_type);
55 osi_Panic("Can't get dentry\n");
59 #if defined(S_NOATIME)
60 tip->i_flags |= S_NOATIME; /* Disable updating access times. */
62 tip->i_flags |= MS_NOATIME; /* Disable updating access times. */
65 #if defined(STRUCT_TASK_STRUCT_HAS_CRED)
66 filp = dentry_open(dp, mntget(afs_cacheMnt), O_RDWR, current_cred());
68 filp = dentry_open(dp, mntget(afs_cacheMnt), O_RDWR);
71 #if defined(LINUX_USE_FH)
72 osi_Panic("Can't open file\n");
74 osi_Panic("Can't open inode %d\n", (int) ainode->ufs);
80 osi_UFSOpen(afs_dcache_id_t *ainode)
82 struct osi_file *afile = NULL;
83 extern int cacheDiskType;
84 struct file *filp = NULL;
85 AFS_STATCNT(osi_UFSOpen);
86 if (cacheDiskType != AFS_FCACHE_TYPE_UFS) {
87 osi_Panic("UFSOpen called for non-UFS cache\n");
89 if (!afs_osicred_initialized) {
90 /* valid for alpha_osf, SunOS, Ultrix */
91 memset(&afs_osi_cred, 0, sizeof(afs_ucred_t));
92 crhold(&afs_osi_cred); /* don't let it evaporate, since it is static */
93 afs_osicred_initialized = 1;
95 afile = (struct osi_file *)osi_AllocLargeSpace(sizeof(struct osi_file));
98 osi_Panic("osi_UFSOpen: Failed to allocate %d bytes for osi_file.\n",
99 (int)sizeof(struct osi_file));
101 memset(afile, 0, sizeof(struct osi_file));
103 afile->filp = afs_linux_raw_open(ainode);
104 afile->size = i_size_read(FILE_INODE(afile->filp));
107 afile->proc = (int (*)())0;
108 return (void *)afile;
112 osi_UFSOpen(afs_dcache_id_t *ainode)
114 register struct osi_file *afile = NULL;
115 extern int cacheDiskType;
117 struct inode *tip = NULL;
118 struct file *filp = NULL;
119 AFS_STATCNT(osi_UFSOpen);
120 if (cacheDiskType != AFS_FCACHE_TYPE_UFS) {
121 osi_Panic("UFSOpen called for non-UFS cache\n");
123 if (!afs_osicred_initialized) {
124 /* valid for alpha_osf, SunOS, Ultrix */
125 memset(&afs_osi_cred, 0, sizeof(afs_ucred_t));
126 crhold(&afs_osi_cred); /* don't let it evaporate, since it is static */
127 afs_osicred_initialized = 1;
129 afile = (struct osi_file *)osi_AllocLargeSpace(sizeof(struct osi_file));
132 osi_Panic("osi_UFSOpen: Failed to allocate %d bytes for osi_file.\n",
133 sizeof(struct osi_file));
135 memset(afile, 0, sizeof(struct osi_file));
137 filp->f_dentry = &afile->dentry;
138 tip = iget(afs_cacheSBp, ainode->ufs);
140 osi_Panic("Can't get inode %d\n", ainode->ufs);
141 FILE_INODE(filp) = tip;
142 tip->i_flags |= MS_NOATIME; /* Disable updating access times. */
143 filp->f_flags = O_RDWR;
144 #if defined(AFS_LINUX24_ENV)
145 filp->f_mode = FMODE_READ|FMODE_WRITE;
146 filp->f_op = fops_get(tip->i_fop);
148 filp->f_op = tip->i_op->default_file_ops;
150 if (filp->f_op && filp->f_op->open)
151 code = filp->f_op->open(tip, filp);
153 osi_Panic("Can't open inode %d\n", ainode->ufs);
154 afile->size = i_size_read(tip);
157 afile->proc = (int (*)())0;
158 return (void *)afile;
162 #if defined(LINUX_USE_FH)
164 * Given a dentry, return the file handle as encoded by the filesystem.
165 * We can't assume anything about the length (words, not bytes).
166 * The cache has to live on a single filesystem with uniform file
167 * handles, otherwise we panic.
169 void osi_get_fh(struct dentry *dp, afs_ufs_dcache_id_t *ainode) {
173 if (cache_fh_len > 0)
174 max_len = cache_fh_len;
176 max_len = MAX_FH_LEN;
177 if (dp->d_sb->s_export_op->encode_fh) {
178 type = dp->d_sb->s_export_op->encode_fh(dp, &ainode->raw[0], &max_len, 0);
180 osi_Panic("File handle encoding failed\n");
182 if (cache_fh_type < 0)
183 cache_fh_type = type;
184 if (cache_fh_len < 0) {
185 cache_fh_len = max_len;
187 if (type != cache_fh_type || max_len != cache_fh_len) {
188 osi_Panic("Inconsistent file handles within cache\n");
191 /* If fs doesn't provide an encode_fh method, assume the default INO32 type */
192 if (cache_fh_type < 0)
193 cache_fh_type = FILEID_INO32_GEN;
194 if (cache_fh_len < 0)
195 cache_fh_len = sizeof(struct fid)/4;
196 ainode->fh.i32.ino = dp->d_inode->i_ino;
197 ainode->fh.i32.gen = dp->d_inode->i_generation;
201 void osi_get_fh(struct dentry *dp, afs_ufs_dcache_id_t *ainode) {
202 *ainode = dp->d_inode->i_ino;
207 afs_osi_Stat(register struct osi_file *afile, register struct osi_stat *astat)
209 register afs_int32 code;
210 AFS_STATCNT(osi_Stat);
211 ObtainWriteLock(&afs_xosi, 320);
212 astat->size = i_size_read(OSIFILE_INODE(afile));
213 #if defined(AFS_LINUX26_ENV)
214 astat->mtime = OSIFILE_INODE(afile)->i_mtime.tv_sec;
215 astat->atime = OSIFILE_INODE(afile)->i_atime.tv_sec;
217 astat->mtime = OSIFILE_INODE(afile)->i_mtime;
218 astat->atime = OSIFILE_INODE(afile)->i_atime;
221 ReleaseWriteLock(&afs_xosi);
225 #ifdef AFS_LINUX26_ENV
227 osi_UFSClose(register struct osi_file *afile)
229 AFS_STATCNT(osi_Close);
231 if (OSIFILE_INODE(afile)) {
232 filp_close(afile->filp, NULL);
236 osi_FreeLargeSpace(afile);
241 osi_UFSClose(register struct osi_file *afile)
243 AFS_STATCNT(osi_Close);
245 if (FILE_INODE(&afile->file)) {
246 struct file *filp = &afile->file;
247 if (filp->f_op && filp->f_op->release)
248 filp->f_op->release(FILE_INODE(filp), filp);
249 iput(FILE_INODE(filp));
253 osi_FreeLargeSpace(afile);
259 osi_UFSTruncate(register struct osi_file *afile, afs_int32 asize)
261 register afs_int32 code;
262 struct osi_stat tstat;
263 struct iattr newattrs;
264 struct inode *inode = OSIFILE_INODE(afile);
265 AFS_STATCNT(osi_Truncate);
267 /* This routine only shrinks files, and most systems
268 * have very slow truncates, even when the file is already
269 * small enough. Check now and save some time.
271 code = afs_osi_Stat(afile, &tstat);
272 if (code || tstat.size <= asize)
274 ObtainWriteLock(&afs_xosi, 321);
276 #ifdef STRUCT_INODE_HAS_I_ALLOC_SEM
277 down_write(&inode->i_alloc_sem);
279 #ifdef STRUCT_INODE_HAS_I_MUTEX
280 mutex_lock(&inode->i_mutex);
284 newattrs.ia_size = asize;
285 newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
286 #if defined(AFS_LINUX24_ENV)
287 newattrs.ia_ctime = CURRENT_TIME;
289 /* avoid notify_change() since it wants to update dentry->d_parent */
291 code = inode_change_ok(inode, &newattrs);
293 #ifdef INODE_SETATTR_NOT_VOID
294 #if defined(AFS_LINUX26_ENV)
295 if (inode->i_op && inode->i_op->setattr)
296 code = inode->i_op->setattr(afile->filp->f_dentry, &newattrs);
299 code = inode_setattr(inode, &newattrs);
301 inode_setattr(inode, &newattrs);
306 truncate_inode_pages(&inode->i_data, asize);
308 i_size_write(inode, asize);
309 if (inode->i_sb->s_op && inode->i_sb->s_op->notify_change) {
310 code = inode->i_sb->s_op->notify_change(&afile->dentry, &newattrs);
313 truncate_inode_pages(inode, asize);
314 if (inode->i_op && inode->i_op->truncate)
315 inode->i_op->truncate(inode);
319 #ifdef STRUCT_INODE_HAS_I_MUTEX
320 mutex_unlock(&inode->i_mutex);
324 #ifdef STRUCT_INODE_HAS_I_ALLOC_SEM
325 up_write(&inode->i_alloc_sem);
328 ReleaseWriteLock(&afs_xosi);
333 /* Generic read interface */
335 afs_osi_Read(register struct osi_file *afile, int offset, void *aptr,
342 AFS_STATCNT(osi_Read);
345 * If the osi_file passed in is NULL, panic only if AFS is not shutting
346 * down. No point in crashing when we are already shutting down
349 if (!afs_shuttingdown)
350 osi_Panic("osi_Read called with null param");
356 afile->offset = offset;
357 setup_uio(&auio, &iov, aptr, afile->offset, asize, UIO_READ, AFS_UIOSYS);
359 code = osi_rdwr(afile, &auio, UIO_READ);
362 code = asize - auio.uio_resid;
363 afile->offset += code;
365 afs_Trace2(afs_iclSetp, CM_TRACE_READFAILED, ICL_TYPE_INT32, auio.uio_resid,
366 ICL_TYPE_INT32, code);
372 /* Generic write interface */
374 afs_osi_Write(register struct osi_file *afile, afs_int32 offset, void *aptr,
381 AFS_STATCNT(osi_Write);
384 if (!afs_shuttingdown)
385 osi_Panic("afs_osi_Write called with null param");
391 afile->offset = offset;
392 setup_uio(&auio, &iov, aptr, afile->offset, asize, UIO_WRITE, AFS_UIOSYS);
394 code = osi_rdwr(afile, &auio, UIO_WRITE);
397 code = asize - auio.uio_resid;
398 afile->offset += code;
402 ("\n\n\n*** Cache partition is FULL - Decrease cachesize!!! ***\n\n");
407 (*afile->proc)(afile, code);
413 /* This work should be handled by physstrat in ca/machdep.c.
414 This routine written from the RT NFS port strategy routine.
415 It has been generalized a bit, but should still be pretty clear. */
417 afs_osi_MapStrategy(int (*aproc) (struct buf * bp), register struct buf *bp)
419 afs_int32 returnCode;
421 AFS_STATCNT(osi_MapStrategy);
422 returnCode = (*aproc) (bp);
428 shutdown_osifile(void)
430 AFS_STATCNT(shutdown_osifile);
431 if (afs_cold_shutdown) {
432 afs_osicred_initialized = 0;
436 /* Intialize cache device info and fragment size for disk cache partition. */
438 osi_InitCacheInfo(char *aname)
441 extern afs_dcache_id_t cacheInode;
443 extern struct osi_dev cacheDev;
444 extern afs_int32 afs_fsfragsize;
445 extern struct super_block *afs_cacheSBp;
446 extern struct vfsmount *afs_cacheMnt;
447 code = osi_lookupname_internal(aname, 1, &afs_cacheMnt, &dp);
451 osi_get_fh(dp, &cacheInode.ufs);
452 cacheDev.dev = dp->d_inode->i_sb->s_dev;
453 afs_fsfragsize = dp->d_inode->i_sb->s_blocksize - 1;
454 afs_cacheSBp = dp->d_inode->i_sb;
462 #define FOP_READ(F, B, C) (F)->f_op->read(F, B, (size_t)(C), &(F)->f_pos)
463 #define FOP_WRITE(F, B, C) (F)->f_op->write(F, B, (size_t)(C), &(F)->f_pos)
466 * seek, then read or write to an open inode. addrp points to data in
470 osi_rdwr(struct osi_file *osifile, uio_t * uiop, int rw)
472 #ifdef AFS_LINUX26_ENV
473 struct file *filp = osifile->filp;
475 struct file *filp = &osifile->file;
481 unsigned long savelim;
483 savelim = current->TASK_STRUCT_RLIM[RLIMIT_FSIZE].rlim_cur;
484 current->TASK_STRUCT_RLIM[RLIMIT_FSIZE].rlim_cur = RLIM_INFINITY;
486 if (uiop->uio_seg == AFS_UIOSYS)
489 /* seek to the desired position. Return -1 on error. */
490 if (filp->f_op->llseek) {
491 if (filp->f_op->llseek(filp, (loff_t) uiop->uio_offset, 0) != uiop->uio_offset)
494 filp->f_pos = uiop->uio_offset;
496 while (code == 0 && uiop->uio_resid > 0 && uiop->uio_iovcnt > 0) {
498 count = iov->iov_len;
506 code = FOP_READ(filp, iov->iov_base, count);
508 code = FOP_WRITE(filp, iov->iov_base, count);
513 } else if (code == 0) {
515 * This is bad -- we can't read any more data from the
516 * file, but we have no good way of signaling a partial
523 iov->iov_base += code;
524 iov->iov_len -= code;
525 uiop->uio_resid -= code;
526 uiop->uio_offset += code;
530 if (uiop->uio_seg == AFS_UIOSYS)
533 current->TASK_STRUCT_RLIM[RLIMIT_FSIZE].rlim_cur = savelim;
539 * Setup a uio struct.
542 setup_uio(uio_t * uiop, struct iovec *iovecp, const char *buf, afs_offs_t pos,
543 int count, uio_flag_t flag, uio_seg_t seg)
545 iovecp->iov_base = (char *)buf;
546 iovecp->iov_len = count;
547 uiop->uio_iov = iovecp;
548 uiop->uio_iovcnt = 1;
549 uiop->uio_offset = pos;
551 uiop->uio_resid = count;
552 uiop->uio_flag = flag;
557 * UIO_READ : dp -> uio
558 * UIO_WRITE : uio -> dp
561 uiomove(char *dp, int length, uio_flag_t rw, uio_t * uiop)
567 while (length > 0 && uiop->uio_resid > 0 && uiop->uio_iovcnt > 0) {
569 count = iov->iov_len;
580 switch (uiop->uio_seg) {
584 memcpy(iov->iov_base, dp, count);
587 memcpy(dp, iov->iov_base, count);
590 printf("uiomove: Bad rw = %d\n", rw);
597 AFS_COPYOUT(dp, iov->iov_base, count, code);
600 AFS_COPYIN(iov->iov_base, dp, count, code);
603 printf("uiomove: Bad rw = %d\n", rw);
608 printf("uiomove: Bad seg = %d\n", uiop->uio_seg);
614 iov->iov_base += count;
615 iov->iov_len -= count;
616 uiop->uio_offset += count;
617 uiop->uio_resid -= count;