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");
58 tip->i_flags |= MS_NOATIME; /* Disable updating access times. */
60 #if defined(STRUCT_TASK_HAS_CRED)
61 filp = dentry_open(dp, mntget(afs_cacheMnt), O_RDWR, current_cred());
63 filp = dentry_open(dp, mntget(afs_cacheMnt), O_RDWR);
66 #if defined(LINUX_USE_FH)
67 osi_Panic("Can't open file\n");
69 osi_Panic("Can't open inode %d\n", (int) ainode->ufs);
75 osi_UFSOpen(afs_dcache_id_t *ainode)
77 struct osi_file *afile = NULL;
78 extern int cacheDiskType;
79 struct file *filp = NULL;
80 AFS_STATCNT(osi_UFSOpen);
81 if (cacheDiskType != AFS_FCACHE_TYPE_UFS) {
82 osi_Panic("UFSOpen called for non-UFS cache\n");
84 if (!afs_osicred_initialized) {
85 /* valid for alpha_osf, SunOS, Ultrix */
86 memset(&afs_osi_cred, 0, sizeof(afs_ucred_t));
87 crhold(&afs_osi_cred); /* don't let it evaporate, since it is static */
88 afs_osicred_initialized = 1;
90 afile = (struct osi_file *)osi_AllocLargeSpace(sizeof(struct osi_file));
93 osi_Panic("osi_UFSOpen: Failed to allocate %d bytes for osi_file.\n",
94 (int)sizeof(struct osi_file));
96 memset(afile, 0, sizeof(struct osi_file));
98 afile->filp = afs_linux_raw_open(ainode);
99 afile->size = i_size_read(FILE_INODE(afile->filp));
102 afile->proc = (int (*)())0;
103 return (void *)afile;
107 osi_UFSOpen(afs_dcache_id_t *ainode)
109 register struct osi_file *afile = NULL;
110 extern int cacheDiskType;
112 struct inode *tip = NULL;
113 struct file *filp = NULL;
114 AFS_STATCNT(osi_UFSOpen);
115 if (cacheDiskType != AFS_FCACHE_TYPE_UFS) {
116 osi_Panic("UFSOpen called for non-UFS cache\n");
118 if (!afs_osicred_initialized) {
119 /* valid for alpha_osf, SunOS, Ultrix */
120 memset(&afs_osi_cred, 0, sizeof(afs_ucred_t));
121 crhold(&afs_osi_cred); /* don't let it evaporate, since it is static */
122 afs_osicred_initialized = 1;
124 afile = (struct osi_file *)osi_AllocLargeSpace(sizeof(struct osi_file));
127 osi_Panic("osi_UFSOpen: Failed to allocate %d bytes for osi_file.\n",
128 sizeof(struct osi_file));
130 memset(afile, 0, sizeof(struct osi_file));
132 filp->f_dentry = &afile->dentry;
133 tip = iget(afs_cacheSBp, ainode->ufs);
135 osi_Panic("Can't get inode %d\n", ainode->ufs);
136 FILE_INODE(filp) = tip;
137 tip->i_flags |= MS_NOATIME; /* Disable updating access times. */
138 filp->f_flags = O_RDWR;
139 #if defined(AFS_LINUX24_ENV)
140 filp->f_mode = FMODE_READ|FMODE_WRITE;
141 filp->f_op = fops_get(tip->i_fop);
143 filp->f_op = tip->i_op->default_file_ops;
145 if (filp->f_op && filp->f_op->open)
146 code = filp->f_op->open(tip, filp);
148 osi_Panic("Can't open inode %d\n", ainode->ufs);
149 afile->size = i_size_read(tip);
152 afile->proc = (int (*)())0;
153 return (void *)afile;
157 #if defined(LINUX_USE_FH)
159 * Given a dentry, return the file handle as encoded by the filesystem.
160 * We can't assume anything about the length (words, not bytes).
161 * The cache has to live on a single filesystem with uniform file
162 * handles, otherwise we panic.
164 void osi_get_fh(struct dentry *dp, afs_ufs_dcache_id_t *ainode) {
168 if (cache_fh_len > 0)
169 max_len = cache_fh_len;
171 max_len = MAX_FH_LEN;
172 if (dp->d_sb->s_export_op->encode_fh) {
173 type = dp->d_sb->s_export_op->encode_fh(dp, &ainode->raw[0], &max_len, 0);
175 osi_Panic("File handle encoding failed\n");
177 if (cache_fh_type < 0)
178 cache_fh_type = type;
179 if (cache_fh_len < 0) {
180 cache_fh_len = max_len;
182 if (type != cache_fh_type || max_len != cache_fh_len) {
183 osi_Panic("Inconsistent file handles within cache\n");
186 /* If fs doesn't provide an encode_fh method, assume the default INO32 type */
187 if (cache_fh_type < 0)
188 cache_fh_type = FILEID_INO32_GEN;
189 if (cache_fh_len < 0)
190 cache_fh_len = sizeof(struct fid)/4;
191 ainode->fh.i32.ino = dp->d_inode->i_ino;
192 ainode->fh.i32.gen = dp->d_inode->i_generation;
196 void osi_get_fh(struct dentry *dp, afs_ufs_dcache_id_t *ainode) {
197 *ainode = dp->d_inode->i_ino;
202 afs_osi_Stat(register struct osi_file *afile, register struct osi_stat *astat)
204 register afs_int32 code;
205 AFS_STATCNT(osi_Stat);
206 ObtainWriteLock(&afs_xosi, 320);
207 astat->size = i_size_read(OSIFILE_INODE(afile));
208 #if defined(AFS_LINUX26_ENV)
209 astat->mtime = OSIFILE_INODE(afile)->i_mtime.tv_sec;
210 astat->atime = OSIFILE_INODE(afile)->i_atime.tv_sec;
212 astat->mtime = OSIFILE_INODE(afile)->i_mtime;
213 astat->atime = OSIFILE_INODE(afile)->i_atime;
216 ReleaseWriteLock(&afs_xosi);
220 #ifdef AFS_LINUX26_ENV
222 osi_UFSClose(register struct osi_file *afile)
224 AFS_STATCNT(osi_Close);
226 if (OSIFILE_INODE(afile)) {
227 filp_close(afile->filp, NULL);
231 osi_FreeLargeSpace(afile);
236 osi_UFSClose(register struct osi_file *afile)
238 AFS_STATCNT(osi_Close);
240 if (FILE_INODE(&afile->file)) {
241 struct file *filp = &afile->file;
242 if (filp->f_op && filp->f_op->release)
243 filp->f_op->release(FILE_INODE(filp), filp);
244 iput(FILE_INODE(filp));
248 osi_FreeLargeSpace(afile);
254 osi_UFSTruncate(register struct osi_file *afile, afs_int32 asize)
256 register afs_int32 code;
257 struct osi_stat tstat;
258 struct iattr newattrs;
259 struct inode *inode = OSIFILE_INODE(afile);
260 AFS_STATCNT(osi_Truncate);
262 /* This routine only shrinks files, and most systems
263 * have very slow truncates, even when the file is already
264 * small enough. Check now and save some time.
266 code = afs_osi_Stat(afile, &tstat);
267 if (code || tstat.size <= asize)
269 ObtainWriteLock(&afs_xosi, 321);
271 #ifdef STRUCT_INODE_HAS_I_ALLOC_SEM
272 down_write(&inode->i_alloc_sem);
274 #ifdef STRUCT_INODE_HAS_I_MUTEX
275 mutex_lock(&inode->i_mutex);
279 newattrs.ia_size = asize;
280 newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
281 #if defined(AFS_LINUX24_ENV)
282 newattrs.ia_ctime = CURRENT_TIME;
284 /* avoid notify_change() since it wants to update dentry->d_parent */
286 code = inode_change_ok(inode, &newattrs);
288 #ifdef INODE_SETATTR_NOT_VOID
289 #if defined(AFS_LINUX26_ENV)
290 if (inode->i_op && inode->i_op->setattr)
291 code = inode->i_op->setattr(afile->filp->f_dentry, &newattrs);
294 code = inode_setattr(inode, &newattrs);
296 inode_setattr(inode, &newattrs);
301 truncate_inode_pages(&inode->i_data, asize);
303 i_size_write(inode, asize);
304 if (inode->i_sb->s_op && inode->i_sb->s_op->notify_change) {
305 code = inode->i_sb->s_op->notify_change(&afile->dentry, &newattrs);
308 truncate_inode_pages(inode, asize);
309 if (inode->i_op && inode->i_op->truncate)
310 inode->i_op->truncate(inode);
314 #ifdef STRUCT_INODE_HAS_I_MUTEX
315 mutex_unlock(&inode->i_mutex);
319 #ifdef STRUCT_INODE_HAS_I_ALLOC_SEM
320 up_write(&inode->i_alloc_sem);
323 ReleaseWriteLock(&afs_xosi);
328 /* Generic read interface */
330 afs_osi_Read(register struct osi_file *afile, int offset, void *aptr,
337 AFS_STATCNT(osi_Read);
340 * If the osi_file passed in is NULL, panic only if AFS is not shutting
341 * down. No point in crashing when we are already shutting down
344 if (!afs_shuttingdown)
345 osi_Panic("osi_Read called with null param");
351 afile->offset = offset;
352 setup_uio(&auio, &iov, aptr, afile->offset, asize, UIO_READ, AFS_UIOSYS);
354 code = osi_rdwr(afile, &auio, UIO_READ);
357 code = asize - auio.uio_resid;
358 afile->offset += code;
360 afs_Trace2(afs_iclSetp, CM_TRACE_READFAILED, ICL_TYPE_INT32, auio.uio_resid,
361 ICL_TYPE_INT32, code);
367 /* Generic write interface */
369 afs_osi_Write(register struct osi_file *afile, afs_int32 offset, void *aptr,
376 AFS_STATCNT(osi_Write);
379 if (!afs_shuttingdown)
380 osi_Panic("afs_osi_Write called with null param");
386 afile->offset = offset;
387 setup_uio(&auio, &iov, aptr, afile->offset, asize, UIO_WRITE, AFS_UIOSYS);
389 code = osi_rdwr(afile, &auio, UIO_WRITE);
392 code = asize - auio.uio_resid;
393 afile->offset += code;
397 ("\n\n\n*** Cache partition is FULL - Decrease cachesize!!! ***\n\n");
402 (*afile->proc)(afile, code);
408 /* This work should be handled by physstrat in ca/machdep.c.
409 This routine written from the RT NFS port strategy routine.
410 It has been generalized a bit, but should still be pretty clear. */
412 afs_osi_MapStrategy(int (*aproc) (struct buf * bp), register struct buf *bp)
414 afs_int32 returnCode;
416 AFS_STATCNT(osi_MapStrategy);
417 returnCode = (*aproc) (bp);
423 shutdown_osifile(void)
425 AFS_STATCNT(shutdown_osifile);
426 if (afs_cold_shutdown) {
427 afs_osicred_initialized = 0;
431 /* Intialize cache device info and fragment size for disk cache partition. */
433 osi_InitCacheInfo(char *aname)
436 extern afs_dcache_id_t cacheInode;
438 extern struct osi_dev cacheDev;
439 extern afs_int32 afs_fsfragsize;
440 extern struct super_block *afs_cacheSBp;
441 extern struct vfsmount *afs_cacheMnt;
442 code = osi_lookupname_internal(aname, 1, &afs_cacheMnt, &dp);
446 osi_get_fh(dp, &cacheInode.ufs);
447 cacheDev.dev = dp->d_inode->i_sb->s_dev;
448 afs_fsfragsize = dp->d_inode->i_sb->s_blocksize - 1;
449 afs_cacheSBp = dp->d_inode->i_sb;
457 #define FOP_READ(F, B, C) (F)->f_op->read(F, B, (size_t)(C), &(F)->f_pos)
458 #define FOP_WRITE(F, B, C) (F)->f_op->write(F, B, (size_t)(C), &(F)->f_pos)
461 * seek, then read or write to an open inode. addrp points to data in
465 osi_rdwr(struct osi_file *osifile, uio_t * uiop, int rw)
467 #ifdef AFS_LINUX26_ENV
468 struct file *filp = osifile->filp;
470 struct file *filp = &osifile->file;
476 unsigned long savelim;
478 savelim = current->TASK_STRUCT_RLIM[RLIMIT_FSIZE].rlim_cur;
479 current->TASK_STRUCT_RLIM[RLIMIT_FSIZE].rlim_cur = RLIM_INFINITY;
481 if (uiop->uio_seg == AFS_UIOSYS)
484 /* seek to the desired position. Return -1 on error. */
485 if (filp->f_op->llseek) {
486 if (filp->f_op->llseek(filp, (loff_t) uiop->uio_offset, 0) != uiop->uio_offset)
489 filp->f_pos = uiop->uio_offset;
491 while (code == 0 && uiop->uio_resid > 0 && uiop->uio_iovcnt > 0) {
493 count = iov->iov_len;
501 code = FOP_READ(filp, iov->iov_base, count);
503 code = FOP_WRITE(filp, iov->iov_base, count);
508 } else if (code == 0) {
510 * This is bad -- we can't read any more data from the
511 * file, but we have no good way of signaling a partial
518 iov->iov_base += code;
519 iov->iov_len -= code;
520 uiop->uio_resid -= code;
521 uiop->uio_offset += code;
525 if (uiop->uio_seg == AFS_UIOSYS)
528 current->TASK_STRUCT_RLIM[RLIMIT_FSIZE].rlim_cur = savelim;
534 * Setup a uio struct.
537 setup_uio(uio_t * uiop, struct iovec *iovecp, const char *buf, afs_offs_t pos,
538 int count, uio_flag_t flag, uio_seg_t seg)
540 iovecp->iov_base = (char *)buf;
541 iovecp->iov_len = count;
542 uiop->uio_iov = iovecp;
543 uiop->uio_iovcnt = 1;
544 uiop->uio_offset = pos;
546 uiop->uio_resid = count;
547 uiop->uio_flag = flag;
552 * UIO_READ : dp -> uio
553 * UIO_WRITE : uio -> dp
556 uiomove(char *dp, int length, uio_flag_t rw, uio_t * uiop)
562 while (length > 0 && uiop->uio_resid > 0 && uiop->uio_iovcnt > 0) {
564 count = iov->iov_len;
575 switch (uiop->uio_seg) {
579 memcpy(iov->iov_base, dp, count);
582 memcpy(dp, iov->iov_base, count);
585 printf("uiomove: Bad rw = %d\n", rw);
592 AFS_COPYOUT(dp, iov->iov_base, count, code);
595 AFS_COPYIN(iov->iov_base, dp, count, code);
598 printf("uiomove: Bad rw = %d\n", rw);
603 printf("uiomove: Bad seg = %d\n", uiop->uio_seg);
609 iov->iov_base += count;
610 iov->iov_len -= count;
611 uiop->uio_offset += count;
612 uiop->uio_resid -= count;