#include <afsconfig.h>
#include "afs/param.h"
-RCSID("$Header$");
+#include <linux/module.h> /* early to avoid printf->printk mapping */
#include "afs/sysincludes.h" /* Standard vendor system headers */
#include "afsincludes.h" /* Afs-based standard headers */
-#include "afs/afs_stats.h" /* afs statistics */
-#include "h/smp_lock.h"
-
+#include "afs/afs_stats.h" /* afs statistics */
+#include <linux/smp_lock.h>
+#include <linux/namei.h>
+#if defined(LINUX_USE_FH)
+#include <linux/exportfs.h>
+int cache_fh_type = -1;
+int cache_fh_len = -1;
+#endif
-int afs_osicred_initialized=0;
-struct AFS_UCRED afs_osi_cred;
afs_lock_t afs_xosi; /* lock is for tvattr */
extern struct osi_dev cacheDev;
+extern struct vfsmount *afs_cacheMnt;
extern struct super_block *afs_cacheSBp;
+#if defined(STRUCT_TASK_HAS_CRED)
+extern struct cred *cache_creds;
+#endif
-void *osi_UFSOpen(afs_int32 ainode)
+struct file *
+afs_linux_raw_open(afs_dcache_id_t *ainode)
{
- struct inode *ip;
- register struct osi_file *afile = NULL;
- extern int cacheDiskType;
- afs_int32 code = 0;
- int dummy;
struct inode *tip = NULL;
- struct file *filp = NULL;
+ struct dentry *dp = NULL;
+ struct file* filp;
+
+#if !defined(LINUX_USE_FH)
+ tip = iget(afs_cacheSBp, ainode->ufs);
+ if (!tip)
+ osi_Panic("Can't get inode %d\n", (int) ainode->ufs);
+
+ dp = d_alloc_anon(tip);
+#else
+ dp = afs_cacheSBp->s_export_op->fh_to_dentry(afs_cacheSBp, &ainode->ufs.fh,
+ cache_fh_len, cache_fh_type);
+ if (!dp)
+ osi_Panic("Can't get dentry\n");
+ tip = dp->d_inode;
+#endif
+ tip->i_flags |= S_NOATIME; /* Disable updating access times. */
+
+#if defined(STRUCT_TASK_HAS_CRED)
+ /* Use stashed credentials - prevent selinux/apparmor problems */
+ filp = dentry_open(dp, mntget(afs_cacheMnt), O_RDWR, cache_creds);
+ if (IS_ERR(filp))
+ filp = dentry_open(dp, mntget(afs_cacheMnt), O_RDWR, current_cred());
+#else
+ filp = dentry_open(dp, mntget(afs_cacheMnt), O_RDWR);
+#endif
+ if (IS_ERR(filp))
+#if defined(LINUX_USE_FH)
+ osi_Panic("Can't open file: %d\n", (int) PTR_ERR(filp));
+#else
+ osi_Panic("Can't open inode %d\n", (int) ainode->ufs);
+#endif
+ return filp;
+}
+
+void *
+osi_UFSOpen(afs_dcache_id_t *ainode)
+{
+ struct osi_file *afile = NULL;
+ extern int cacheDiskType;
+
AFS_STATCNT(osi_UFSOpen);
- if(cacheDiskType != AFS_FCACHE_TYPE_UFS) {
+ if (cacheDiskType != AFS_FCACHE_TYPE_UFS) {
osi_Panic("UFSOpen called for non-UFS cache\n");
}
if (!afs_osicred_initialized) {
/* valid for alpha_osf, SunOS, Ultrix */
- memset((char *)&afs_osi_cred, 0, sizeof(struct AFS_UCRED));
+ memset(&afs_osi_cred, 0, sizeof(afs_ucred_t));
crhold(&afs_osi_cred); /* don't let it evaporate, since it is static */
afs_osicred_initialized = 1;
}
- afile = (struct osi_file *) osi_AllocSmallSpace(sizeof(struct osi_file));
+ afile = (struct osi_file *)osi_AllocLargeSpace(sizeof(struct osi_file));
AFS_GUNLOCK();
if (!afile) {
osi_Panic("osi_UFSOpen: Failed to allocate %d bytes for osi_file.\n",
- sizeof(struct osi_file));
+ (int)sizeof(struct osi_file));
}
memset(afile, 0, sizeof(struct osi_file));
- filp = &afile->file;
- filp->f_dentry = &afile->dentry;
- tip = iget(afs_cacheSBp, (u_long)ainode);
- if (!tip)
- osi_Panic("Can't get inode %d\n", ainode);
- FILE_INODE(filp) = tip;
- tip->i_flags |= MS_NOATIME; /* Disable updating access times. */
- filp->f_flags = O_RDWR;
-#if defined(AFS_LINUX24_ENV)
- filp->f_op = fops_get(tip->i_fop);
-#else
- filp->f_op = tip->i_op->default_file_ops;
-#endif
- if (filp->f_op && filp->f_op->open)
- code = filp->f_op->open(tip, filp);
- if (code)
- osi_Panic("Can't open inode %d\n", ainode);
- afile->size = tip->i_size;
+
+ afile->filp = afs_linux_raw_open(ainode);
+ afile->size = i_size_read(FILE_INODE(afile->filp));
AFS_GLOCK();
afile->offset = 0;
- afile->proc = (int (*)()) 0;
- afile->inum = ainode; /* for hint validity checking */
+ afile->proc = (int (*)())0;
return (void *)afile;
}
-int afs_osi_Stat(register struct osi_file *afile, register struct osi_stat *astat)
+#if defined(LINUX_USE_FH)
+/*
+ * Given a dentry, return the file handle as encoded by the filesystem.
+ * We can't assume anything about the length (words, not bytes).
+ * The cache has to live on a single filesystem with uniform file
+ * handles, otherwise we panic.
+ */
+void osi_get_fh(struct dentry *dp, afs_ufs_dcache_id_t *ainode) {
+ int max_len;
+ int type;
+
+ if (cache_fh_len > 0)
+ max_len = cache_fh_len;
+ else
+ max_len = MAX_FH_LEN;
+ if (dp->d_sb->s_export_op->encode_fh) {
+ type = dp->d_sb->s_export_op->encode_fh(dp, &ainode->raw[0], &max_len, 0);
+ if (type == 255) {
+ osi_Panic("File handle encoding failed\n");
+ }
+ if (cache_fh_type < 0)
+ cache_fh_type = type;
+ if (cache_fh_len < 0) {
+ cache_fh_len = max_len;
+ }
+ if (type != cache_fh_type || max_len != cache_fh_len) {
+ osi_Panic("Inconsistent file handles within cache\n");
+ }
+ } else {
+ /* If fs doesn't provide an encode_fh method, assume the default INO32 type */
+ if (cache_fh_type < 0)
+ cache_fh_type = FILEID_INO32_GEN;
+ if (cache_fh_len < 0)
+ cache_fh_len = sizeof(struct fid)/4;
+ ainode->fh.i32.ino = dp->d_inode->i_ino;
+ ainode->fh.i32.gen = dp->d_inode->i_generation;
+ }
+}
+#else
+void osi_get_fh(struct dentry *dp, afs_ufs_dcache_id_t *ainode) {
+ *ainode = dp->d_inode->i_ino;
+}
+#endif
+
+int
+afs_osi_Stat(register struct osi_file *afile, register struct osi_stat *astat)
{
- register afs_int32 code;
AFS_STATCNT(osi_Stat);
- MObtainWriteLock(&afs_xosi,320);
- astat->size = FILE_INODE(&afile->file)->i_size;
- astat->blksize = FILE_INODE(&afile->file)->i_blksize;
- astat->mtime = FILE_INODE(&afile->file)->i_mtime;
- astat->atime = FILE_INODE(&afile->file)->i_atime;
- code = 0;
- MReleaseWriteLock(&afs_xosi);
- return code;
+ ObtainWriteLock(&afs_xosi, 320);
+ astat->size = i_size_read(OSIFILE_INODE(afile));
+ astat->mtime = OSIFILE_INODE(afile)->i_mtime.tv_sec;
+ astat->atime = OSIFILE_INODE(afile)->i_atime.tv_sec;
+
+ ReleaseWriteLock(&afs_xosi);
+ return 0;
}
-int osi_UFSClose(register struct osi_file *afile)
- {
- AFS_STATCNT(osi_Close);
- if (afile) {
- if (FILE_INODE(&afile->file)) {
- struct file *filp = &afile->file;
- if (filp->f_op && filp->f_op->release)
- filp->f_op->release(FILE_INODE(filp), filp);
- iput(FILE_INODE(filp));
- }
- }
-
- osi_FreeSmallSpace(afile);
- return 0;
- }
-
-int osi_UFSTruncate(register struct osi_file *afile, afs_int32 asize)
+int
+osi_UFSClose(register struct osi_file *afile)
+{
+ AFS_STATCNT(osi_Close);
+ if (afile) {
+ if (OSIFILE_INODE(afile)) {
+ filp_close(afile->filp, NULL);
+ }
+ }
+
+ osi_FreeLargeSpace(afile);
+ return 0;
+}
+
+int
+osi_UFSTruncate(register struct osi_file *afile, afs_int32 asize)
{
- struct AFS_UCRED *oldCred;
register afs_int32 code;
struct osi_stat tstat;
struct iattr newattrs;
- struct inode *inode = FILE_INODE(&afile->file);
+ struct inode *inode = OSIFILE_INODE(afile);
AFS_STATCNT(osi_Truncate);
/* This routine only shrinks files, and most systems
* small enough. Check now and save some time.
*/
code = afs_osi_Stat(afile, &tstat);
- if (code || tstat.size <= asize) return code;
- MObtainWriteLock(&afs_xosi,321);
+ if (code || tstat.size <= asize)
+ return code;
+ ObtainWriteLock(&afs_xosi, 321);
AFS_GUNLOCK();
+#ifdef STRUCT_INODE_HAS_I_MUTEX
+ mutex_lock(&inode->i_mutex);
+#else
down(&inode->i_sem);
- inode->i_size = newattrs.ia_size = asize;
+#endif
+#ifdef STRUCT_INODE_HAS_I_ALLOC_SEM
+ down_write(&inode->i_alloc_sem);
+#endif
+ newattrs.ia_size = asize;
newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
-#if defined(AFS_LINUX24_ENV)
newattrs.ia_ctime = CURRENT_TIME;
/* avoid notify_change() since it wants to update dentry->d_parent */
lock_kernel();
code = inode_change_ok(inode, &newattrs);
- if (!code)
+ if (!code) {
#ifdef INODE_SETATTR_NOT_VOID
- code = inode_setattr(inode, &newattrs);
+ if (inode->i_op && inode->i_op->setattr)
+ code = inode->i_op->setattr(afile->filp->f_dentry, &newattrs);
+ else
+ code = inode_setattr(inode, &newattrs);
#else
- inode_setattr(inode, &newattrs);
+ inode_setattr(inode, &newattrs);
#endif
+ }
unlock_kernel();
if (!code)
truncate_inode_pages(&inode->i_data, asize);
-#else
- if (inode->i_sb->s_op && inode->i_sb->s_op->notify_change) {
- code = inode->i_sb->s_op->notify_change(&afile->dentry, &newattrs);
- }
- if (!code) {
- truncate_inode_pages(inode, asize);
- if (inode->i_op && inode->i_op->truncate)
- inode->i_op->truncate(inode);
- }
-#endif
code = -code;
+#ifdef STRUCT_INODE_HAS_I_ALLOC_SEM
+ up_write(&inode->i_alloc_sem);
+#endif
+#ifdef STRUCT_INODE_HAS_I_MUTEX
+ mutex_unlock(&inode->i_mutex);
+#else
up(&inode->i_sem);
+#endif
AFS_GLOCK();
- MReleaseWriteLock(&afs_xosi);
+ ReleaseWriteLock(&afs_xosi);
return code;
}
/* Generic read interface */
-int afs_osi_Read(register struct osi_file *afile, int offset, void *aptr, afs_int32 asize)
+int
+afs_osi_Read(register struct osi_file *afile, int offset, void *aptr,
+ afs_int32 asize)
{
- struct AFS_UCRED *oldCred;
- size_t resid;
- register afs_int32 code;
- register afs_int32 cnt1=0;
+ struct uio auio;
+ struct iovec iov;
+ afs_int32 code;
+
AFS_STATCNT(osi_Read);
- /**
- * If the osi_file passed in is NULL, panic only if AFS is not shutting
- * down. No point in crashing when we are already shutting down
- */
- if ( !afile ) {
- if ( !afs_shuttingdown )
+ /*
+ * If the osi_file passed in is NULL, panic only if AFS is not shutting
+ * down. No point in crashing when we are already shutting down
+ */
+ if (!afile) {
+ if (!afs_shuttingdown)
osi_Panic("osi_Read called with null param");
else
return EIO;
}
- if (offset != -1) afile->offset = offset;
+ if (offset != -1)
+ afile->offset = offset;
+ setup_uio(&auio, &iov, aptr, afile->offset, asize, UIO_READ, AFS_UIOSYS);
AFS_GUNLOCK();
- code = osi_rdwr(UIO_READ, afile, (caddr_t) aptr, asize, &resid);
+ code = osi_rdwr(afile, &auio, UIO_READ);
AFS_GLOCK();
if (code == 0) {
- code = asize - resid;
+ code = asize - auio.uio_resid;
afile->offset += code;
- }
- else {
- afs_Trace2(afs_iclSetp, CM_TRACE_READFAILED, ICL_TYPE_INT32, resid,
- ICL_TYPE_INT32, code);
+ } else {
+ afs_Trace2(afs_iclSetp, CM_TRACE_READFAILED, ICL_TYPE_INT32, auio.uio_resid,
+ ICL_TYPE_INT32, code);
code = -1;
}
return code;
}
/* Generic write interface */
-int afs_osi_Write(register struct osi_file *afile, afs_int32 offset, void *aptr, afs_int32 asize)
+int
+afs_osi_Write(register struct osi_file *afile, afs_int32 offset, void *aptr,
+ afs_int32 asize)
{
- struct AFS_UCRED *oldCred;
- size_t resid;
- register afs_int32 code;
+ struct uio auio;
+ struct iovec iov;
+ afs_int32 code;
+
AFS_STATCNT(osi_Write);
- if ( !afile )
- osi_Panic("afs_osi_Write called with null param");
- if (offset != -1) afile->offset = offset;
+
+ if (!afile) {
+ if (!afs_shuttingdown)
+ osi_Panic("afs_osi_Write called with null param");
+ else
+ return EIO;
+ }
+
+ if (offset != -1)
+ afile->offset = offset;
+ setup_uio(&auio, &iov, aptr, afile->offset, asize, UIO_WRITE, AFS_UIOSYS);
AFS_GUNLOCK();
- code = osi_rdwr(UIO_WRITE, afile, (caddr_t)aptr, asize, &resid);
+ code = osi_rdwr(afile, &auio, UIO_WRITE);
AFS_GLOCK();
if (code == 0) {
- code = asize - resid;
+ code = asize - auio.uio_resid;
afile->offset += code;
- }
- else {
- if (code == ENOSPC) afs_warnuser("\n\n\n*** Cache partition is FULL - Decrease cachesize!!! ***\n\n");
+ } else {
+ if (code == ENOSPC)
+ afs_warnuser
+ ("\n\n\n*** Cache partition is FULL - Decrease cachesize!!! ***\n\n");
code = -1;
}
- if (afile->proc) {
+
+ if (afile->proc)
(*afile->proc)(afile, code);
- }
+
return code;
}
/* This work should be handled by physstrat in ca/machdep.c.
This routine written from the RT NFS port strategy routine.
It has been generalized a bit, but should still be pretty clear. */
-int afs_osi_MapStrategy(int (*aproc)(), register struct buf *bp)
+int
+afs_osi_MapStrategy(int (*aproc) (struct buf * bp), register struct buf *bp)
{
afs_int32 returnCode;
return returnCode;
}
-void shutdown_osifile(void)
+void
+shutdown_osifile(void)
+{
+ AFS_STATCNT(shutdown_osifile);
+ if (afs_cold_shutdown) {
+ afs_osicred_initialized = 0;
+ }
+}
+
+/* Intialize cache device info and fragment size for disk cache partition. */
+int
+osi_InitCacheInfo(char *aname)
+{
+ int code;
+ extern afs_dcache_id_t cacheInode;
+ struct dentry *dp;
+ extern struct osi_dev cacheDev;
+ extern afs_int32 afs_fsfragsize;
+ extern struct super_block *afs_cacheSBp;
+ extern struct vfsmount *afs_cacheMnt;
+ code = osi_lookupname_internal(aname, 1, &afs_cacheMnt, &dp);
+ if (code)
+ return ENOENT;
+
+ osi_get_fh(dp, &cacheInode.ufs);
+ cacheDev.dev = dp->d_inode->i_sb->s_dev;
+ afs_fsfragsize = dp->d_inode->i_sb->s_blocksize - 1;
+ afs_cacheSBp = dp->d_inode->i_sb;
+
+ dput(dp);
+
+ return 0;
+}
+
+
+/* osi_rdwr
+ * seek, then read or write to an open inode. addrp points to data in
+ * kernel space.
+ */
+int
+osi_rdwr(struct osi_file *osifile, uio_t * uiop, int rw)
+{
+ struct file *filp = osifile->filp;
+ mm_segment_t old_fs = {0};
+ int code = 0;
+ struct iovec *iov;
+ size_t count;
+ unsigned long savelim;
+ loff_t pos;
+
+ savelim = current->TASK_STRUCT_RLIM[RLIMIT_FSIZE].rlim_cur;
+ current->TASK_STRUCT_RLIM[RLIMIT_FSIZE].rlim_cur = RLIM_INFINITY;
+
+ if (uiop->uio_seg == AFS_UIOSYS) {
+ /* Switch into user space */
+ old_fs = get_fs();
+ set_fs(get_ds());
+ }
+
+ /* seek to the desired position. Return -1 on error. */
+ if (vfs_llseek(filp, (loff_t) uiop->uio_offset, 0) != uiop->uio_offset) {
+ code = -1;
+ goto out;
+ }
+
+ while (code == 0 && uiop->uio_resid > 0 && uiop->uio_iovcnt > 0) {
+ iov = uiop->uio_iov;
+ count = iov->iov_len;
+ if (count == 0) {
+ uiop->uio_iov++;
+ uiop->uio_iovcnt--;
+ continue;
+ }
+
+ pos = filp->f_pos;
+ if (rw == UIO_READ)
+ code = filp->f_op->read(filp, iov->iov_base, count, &pos);
+ else
+ code = filp->f_op->write(filp, iov->iov_base, count, &pos);
+ filp->f_pos = pos;
+
+ if (code < 0) {
+ code = -code;
+ break;
+ } else if (code == 0) {
+ /*
+ * This is bad -- we can't read any more data from the
+ * file, but we have no good way of signaling a partial
+ * read either.
+ */
+ code = EIO;
+ break;
+ }
+
+ iov->iov_base += code;
+ iov->iov_len -= code;
+ uiop->uio_resid -= code;
+ uiop->uio_offset += code;
+ code = 0;
+ }
+
+out:
+ if (uiop->uio_seg == AFS_UIOSYS) {
+ /* Switch back into kernel space */
+ set_fs(old_fs);
+ }
+
+ current->TASK_STRUCT_RLIM[RLIMIT_FSIZE].rlim_cur = savelim;
+
+ return code;
+}
+
+/* setup_uio
+ * Setup a uio struct.
+ */
+void
+setup_uio(uio_t * uiop, struct iovec *iovecp, const char *buf, afs_offs_t pos,
+ int count, uio_flag_t flag, uio_seg_t seg)
+{
+ iovecp->iov_base = (char *)buf;
+ iovecp->iov_len = count;
+ uiop->uio_iov = iovecp;
+ uiop->uio_iovcnt = 1;
+ uiop->uio_offset = pos;
+ uiop->uio_seg = seg;
+ uiop->uio_resid = count;
+ uiop->uio_flag = flag;
+}
+
+
+/* uiomove
+ * UIO_READ : dp -> uio
+ * UIO_WRITE : uio -> dp
+ */
+int
+uiomove(char *dp, int length, uio_flag_t rw, uio_t * uiop)
{
- extern int afs_cold_shutdown;
+ int count;
+ struct iovec *iov;
+ int code;
+
+ while (length > 0 && uiop->uio_resid > 0 && uiop->uio_iovcnt > 0) {
+ iov = uiop->uio_iov;
+ count = iov->iov_len;
+
+ if (!count) {
+ uiop->uio_iov++;
+ uiop->uio_iovcnt--;
+ continue;
+ }
- AFS_STATCNT(shutdown_osifile);
- if (afs_cold_shutdown) {
- afs_osicred_initialized = 0;
- }
+ if (count > length)
+ count = length;
+
+ switch (uiop->uio_seg) {
+ case AFS_UIOSYS:
+ switch (rw) {
+ case UIO_READ:
+ memcpy(iov->iov_base, dp, count);
+ break;
+ case UIO_WRITE:
+ memcpy(dp, iov->iov_base, count);
+ break;
+ default:
+ printf("uiomove: Bad rw = %d\n", rw);
+ return -EINVAL;
+ }
+ break;
+ case AFS_UIOUSER:
+ switch (rw) {
+ case UIO_READ:
+ AFS_COPYOUT(dp, iov->iov_base, count, code);
+ break;
+ case UIO_WRITE:
+ AFS_COPYIN(iov->iov_base, dp, count, code);
+ break;
+ default:
+ printf("uiomove: Bad rw = %d\n", rw);
+ return -EINVAL;
+ }
+ break;
+ default:
+ printf("uiomove: Bad seg = %d\n", uiop->uio_seg);
+ return -EINVAL;
+ }
+
+ dp += count;
+ length -= count;
+ iov->iov_base += count;
+ iov->iov_len -= count;
+ uiop->uio_offset += count;
+ uiop->uio_resid -= count;
+ }
+ return 0;
}
git://git.openafs.org / openafs.git / blobdiff