/*
* Linux specific vnodeops. Also includes the glue routines required to call
- * AFS vnodeops. The "NOTUSED" #define is used to indicate routines and
- * calling sequences present in an ops table that we don't actually use.
- * They are present solely for documentation purposes.
+ * AFS vnodeops.
*
* So far the only truly scary part is that Linux relies on the inode cache
* to be up to date. Don't you dare break a callback and expect an fstat
#include "afs/sysincludes.h"
#include "afsincludes.h"
#include "afs/afs_stats.h"
-#include "afs/afs_osidnlc.h"
#include "h/mm.h"
+#ifdef HAVE_MM_INLINE_H
+#include "h/mm_inline.h"
+#endif
#include "h/pagemap.h"
#if defined(AFS_LINUX24_ENV)
#include "h/smp_lock.h"
#endif
+#if defined(AFS_LINUX26_ENV)
+#include "h/writeback.h"
+#endif
#ifdef pgoff2loff
#define pageoff(pp) pgoff2loff((pp)->index)
#define pageoff(pp) pp->offset
#endif
+#if defined(AFS_LINUX26_ENV)
+#define UnlockPage(pp) unlock_page(pp)
+#endif
+
extern struct vcache *afs_globalVp;
extern afs_rwlock_t afs_xvcache;
-extern struct dentry_operations *afs_dops;
#if defined(AFS_LINUX24_ENV)
extern struct inode_operations afs_file_iops;
extern struct address_space_operations afs_file_aops;
extern struct inode_operations afs_symlink_iops;
-#ifdef NOTUSED
-static int
-afs_linux_lseek(struct inode *ip, struct file *fp, off_t, int)
-{
-}
-#endif
-
static ssize_t
afs_linux_read(struct file *fp, char *buf, size_t count, loff_t * offp)
{
if (*offp + count > afs_vmMappingEnd) {
uio_t tuio;
struct iovec iov;
- afs_size_t oldOffset = *offp;
afs_int32 xfered = 0;
if (*offp < afs_vmMappingEnd) {
*offp += count;
}
done:
+ ;
} else {
#endif /* AFS_64BIT_CLIENT */
osi_FlushPages(vcp, credp); /* ensure stale pages are gone */
afs_linux_write(struct file *fp, const char *buf, size_t count, loff_t * offp)
{
ssize_t code = 0;
- int code2;
+ int code2 = 0;
struct vcache *vcp = ITOAFS(fp->f_dentry->d_inode);
struct vrequest treq;
cred_t *credp = crref();
ReleaseWriteLock(&vcp->lock);
}
done:
+ ;
} else {
#endif /* AFS_64BIT_CLIENT */
AFS_GUNLOCK();
return code;
}
+extern int BlobScan(struct dcache * afile, afs_int32 ablob);
+
/* This is a complete rewrite of afs_readdir, since we can make use of
* filldir instead of afs_readdir_move. Note that changes to vcache/dcache
* handling and use of bulkstats will need to be reflected here as well.
cred_t *credp = crref();
struct afs_fakestat_state fakestat;
+#if defined(AFS_LINUX26_ENV)
+ lock_kernel();
+#endif
AFS_GLOCK();
AFS_STATCNT(afs_readdir);
code = afs_InitReq(&treq, credp);
crfree(credp);
- if (code) {
- AFS_GUNLOCK();
- return -code;
- }
+ if (code)
+ goto out1;
afs_InitFakeStat(&fakestat);
code = afs_EvalFakeStat(&avc, &fakestat, &treq);
- if (code) {
- afs_PutFakeStat(&fakestat);
- AFS_GUNLOCK();
- return -code;
- }
+ if (code)
+ goto out;
/* update the cache entry */
tagain:
code = afs_VerifyVCache(avc, &treq);
- if (code) {
- afs_PutFakeStat(&fakestat);
- AFS_GUNLOCK();
- return -code;
- }
+ if (code)
+ goto out;
/* get a reference to the entire directory */
tdc = afs_GetDCache(avc, (afs_size_t) 0, &treq, &origOffset, &tlen, 1);
len = tlen;
if (!tdc) {
- afs_PutFakeStat(&fakestat);
- AFS_GUNLOCK();
- return -ENOENT;
+ code = -ENOENT;
+ goto out;
}
ObtainReadLock(&avc->lock);
ObtainReadLock(&tdc->lock);
* takes an offset in units of blobs, rather than bytes.
*/
code = 0;
- offset = (int)fp->f_pos;
+ offset = (int) fp->f_pos;
while (1) {
- dirpos = BlobScan(&tdc->f.inode, offset);
+ dirpos = BlobScan(tdc, offset);
if (!dirpos)
break;
- de = afs_dir_GetBlob(&tdc->f.inode, dirpos);
+ de = afs_dir_GetBlob(tdc, dirpos);
if (!de)
break;
if (de->name)
len = strlen(de->name);
else {
- printf("afs_linux_readdir: afs_dir_GetBlob failed, null name (inode %x, dirpos %d)\n",
- &tdc->f.inode, dirpos);
- DRelease(de, 0);
+ printf("afs_linux_readdir: afs_dir_GetBlob failed, null name (inode %lx, dirpos %d)\n",
+ (unsigned long)&tdc->f.inode, dirpos);
+ DRelease((struct buffer *) de, 0);
afs_PutDCache(tdc);
ReleaseReadLock(&avc->lock);
- afs_PutFakeStat(&fakestat);
- return -ENOENT;
+ code = -ENOENT;
+ goto out;
}
/* filldir returns -EINVAL when the buffer is full. */
-#if (defined(AFS_LINUX24_ENV) || defined(pgoff2loff)) && defined(DECLARE_FSTYPE)
+#if defined(AFS_LINUX26_ENV) || ((defined(AFS_LINUX24_ENV) || defined(pgoff2loff)) && defined(DECLARE_FSTYPE))
{
unsigned int type = DT_UNKNOWN;
struct VenusFid afid;
#else
code = (*filldir) (dirbuf, de->name, len, offset, ino);
#endif
- DRelease(de, 0);
+ DRelease((struct buffer *)de, 0);
if (code)
break;
offset = dirpos + 1 + ((len + 16) >> 5);
ReleaseReadLock(&tdc->lock);
afs_PutDCache(tdc);
ReleaseReadLock(&avc->lock);
+ code = 0;
+
+out:
afs_PutFakeStat(&fakestat);
+out1:
AFS_GUNLOCK();
- return 0;
+#if defined(AFS_LINUX26_ENV)
+ unlock_kernel();
+#endif
+ return code;
}
-#ifdef NOTUSED
-int afs_linux_select(struct inode *ip, struct file *fp, int, select_table *);
-#endif
/* in afs_pioctl.c */
extern int afs_xioctl(struct inode *ip, struct file *fp, unsigned int com,
unsigned long arg);
+#if defined(HAVE_UNLOCKED_IOCTL) || defined(HAVE_COMPAT_IOCTL)
+static long afs_unlocked_xioctl(struct file *fp, unsigned int com,
+ unsigned long arg) {
+ return afs_xioctl(FILE_INODE(fp), fp, com, arg);
+
+}
+#endif
/* We need to detect unmap's after close. To do that, we need our own
* vm_operations_struct's. And we need to set them up for both the
(void)afs_close(vcp, vmap->vm_file->f_flags, credp);
/* only decrement the execsOrWriters flag if this is not a
* writable file. */
- if (!(vmap->vm_file->f_flags & (FWRITE | FTRUNC)))
- vcp->execsOrWriters--;
+ if (!(vcp->states & CRO) )
+ if (! (vmap->vm_file->f_flags & (FWRITE | FTRUNC)))
+ vcp->execsOrWriters--;
vcp->states &= ~CMAPPED;
crfree(credp);
} else if ((vmap->vm_file->f_flags & (FWRITE | FTRUNC)))
ReleaseWriteLock(&vcp->lock);
}
- unlock_exit:
AFS_GUNLOCK();
}
if (!code)
code = afs_VerifyVCache(vcp, &treq);
+ if (!code && (vcp->states & CRO) &&
+ (vmap->vm_file->f_flags & (FWRITE | FTRUNC)))
+ code = EACCES;
if (code)
code = -code;
/* Add an open reference on the first mapping. */
if (vcp->mapcnt == 0) {
- vcp->execsOrWriters++;
+ if (!(vcp->states & CRO))
+ vcp->execsOrWriters++;
vcp->opens++;
vcp->states |= CMAPPED;
}
int code;
cred_t *credp = crref();
- AFS_GLOCK();
#ifdef AFS_LINUX24_ENV
lock_kernel();
#endif
+ AFS_GLOCK();
code = afs_open((struct vcache **)&ip, fp->f_flags, credp);
+ AFS_GUNLOCK();
#ifdef AFS_LINUX24_ENV
unlock_kernel();
#endif
- AFS_GUNLOCK();
crfree(credp);
return -code;
}
-/* afs_Close is called from release, since release is used to handle all
- * file closings. In addition afs_linux_flush is called from sys_close to
- * handle flushing the data back to the server. The kicker is that we could
- * ignore flush completely if only sys_close took it's return value from
- * fput. See afs_linux_flush for notes on interactions between release and
- * flush.
- */
static int
afs_linux_release(struct inode *ip, struct file *fp)
{
- int code = 0;
- cred_t *credp = crref();
struct vcache *vcp = ITOAFS(ip);
+ cred_t *credp = crref();
+ int code = 0;
- AFS_GLOCK();
#ifdef AFS_LINUX24_ENV
lock_kernel();
#endif
- if (vcp->flushcnt) {
- vcp->flushcnt--; /* protected by AFS global lock. */
- } else {
- code = afs_close(vcp, fp->f_flags, credp);
- }
+ AFS_GLOCK();
+ code = afs_close(vcp, fp->f_flags, credp);
+ AFS_GUNLOCK();
#ifdef AFS_LINUX24_ENV
unlock_kernel();
#endif
- AFS_GUNLOCK();
crfree(credp);
return -code;
struct inode *ip = FILE_INODE(fp);
cred_t *credp = crref();
- AFS_GLOCK();
#ifdef AFS_LINUX24_ENV
lock_kernel();
#endif
+ AFS_GLOCK();
code = afs_fsync(ITOAFS(ip), credp);
+ AFS_GUNLOCK();
#ifdef AFS_LINUX24_ENV
unlock_kernel();
#endif
- AFS_GUNLOCK();
crfree(credp);
return -code;
}
-#ifdef NOTUSED
-/* No support for async i/o */
-int afs_linux_fasync(struct inode *ip, struct file *fp, int);
-
-/* I don't think it will, at least not as can be detected here. */
-int afs_linux_check_media_change(kdev_t dev);
-
-/* Revalidate media and file system. */
-int afs_linux_file_revalidate(kdev_t dev);
-#endif /* NOTUSED */
static int
afs_linux_lock(struct file *fp, int cmd, struct file_lock *flp)
int code = 0;
struct vcache *vcp = ITOAFS(FILE_INODE(fp));
cred_t *credp = crref();
-#ifdef AFS_LINUX24_ENV
- struct flock64 flock;
-#else
- struct flock flock;
-#endif
-
+ struct AFS_FLOCK flock;
/* Convert to a lock format afs_lockctl understands. */
memset((char *)&flock, 0, sizeof(flock));
flock.l_type = flp->fl_type;
}
/* afs_linux_flush
- * flush is called from sys_close. We could ignore it, but sys_close return
- * code comes from flush, not release. We need to use release to keep
- * the vcache open count correct. Note that flush is called before release
- * (via fput) in sys_close. vcp->flushcnt is a bit of ugliness to avoid
- * races and also avoid calling afs_close twice when closing the file.
- * If we merely checked for opens > 0 in afs_linux_release, then if an
- * new open occurred when storing back the file, afs_linux_release would
- * incorrectly close the file and decrement the opens count. Calling afs_close
- * on the just flushed file is wasteful, since the background daemon will
- * execute the code that finally decides there is nothing to do.
+ * essentially the same as afs_fsync() but we need to get the return
+ * code for the sys_close() here, not afs_linux_release(), so call
+ * afs_StoreAllSegments() with AFS_LASTSTORE
*/
int
afs_linux_flush(struct file *fp)
{
+ struct vrequest treq;
struct vcache *vcp = ITOAFS(FILE_INODE(fp));
- int code = 0;
- cred_t *credp;
+ cred_t *credp = crref();
+ int code;
- /* Only do this on the last close of the file pointer. */
-#if defined(AFS_LINUX24_ENV)
- if (atomic_read(&fp->f_count) > 1)
-#else
- if (fp->f_count > 1)
-#endif
- return 0;
+ AFS_GLOCK();
- credp = crref();
+ code = afs_InitReq(&treq, credp);
+ if (code)
+ goto out;
- AFS_GLOCK();
- code = afs_close(vcp, fp->f_flags, credp);
- vcp->flushcnt++; /* protected by AFS global lock. */
+ ObtainSharedLock(&vcp->lock, 535);
+ if (vcp->execsOrWriters > 0) {
+ UpgradeSToWLock(&vcp->lock, 536);
+ code = afs_StoreAllSegments(vcp, &treq, AFS_SYNC | AFS_LASTSTORE);
+ ConvertWToSLock(&vcp->lock);
+ }
+ code = afs_CheckCode(code, &treq, 54);
+ ReleaseSharedLock(&vcp->lock);
+
+out:
AFS_GUNLOCK();
crfree(credp);
return -code;
}
+#if !defined(AFS_LINUX24_ENV)
/* Not allowed to directly read a directory. */
ssize_t
afs_linux_dir_read(struct file * fp, char *buf, size_t count, loff_t * ppos)
{
return -EISDIR;
}
+#endif
-#if defined(AFS_LINUX24_ENV)
struct file_operations afs_dir_fops = {
- read:generic_read_dir,
- readdir:afs_linux_readdir,
- ioctl:afs_xioctl,
- open:afs_linux_open,
- release:afs_linux_release,
-};
+#if !defined(AFS_LINUX24_ENV)
+ .read = afs_linux_dir_read,
+ .lock = afs_linux_lock,
+ .fsync = afs_linux_fsync,
#else
-struct file_operations afs_dir_fops = {
- NULL, /* afs_linux_lseek */
- afs_linux_dir_read,
- NULL, /* afs_linux_write */
- afs_linux_readdir,
- NULL, /* afs_linux_select */
- afs_xioctl, /* close enough to use the ported AFS one */
- NULL, /* afs_linux_mmap */
- afs_linux_open,
- NULL, /* afs_linux_flush */
- afs_linux_release,
- afs_linux_fsync,
- NULL, /* afs_linux_fasync */
- NULL, /* afs_linux_check_media_change */
- NULL, /* afs_linux_file_revalidate */
- afs_linux_lock,
-};
+ .read = generic_read_dir,
+#endif
+ .readdir = afs_linux_readdir,
+#ifdef HAVE_UNLOCKED_IOCTL
+ .unlocked_ioctl = afs_unlocked_xioctl,
+#else
+ .ioctl = afs_xioctl,
+#endif
+#ifdef HAVE_COMPAT_IOCTL
+ .compat_ioctl = afs_unlocked_xioctl,
#endif
+ .open = afs_linux_open,
+ .release = afs_linux_release,
+};
-#if defined(AFS_LINUX24_ENV)
struct file_operations afs_file_fops = {
- read:afs_linux_read,
- write:afs_linux_write,
- ioctl:afs_xioctl,
- mmap:afs_linux_mmap,
- open:afs_linux_open,
- flush:afs_linux_flush,
- release:afs_linux_release,
- fsync:afs_linux_fsync,
- lock:afs_linux_lock,
-};
+ .read = afs_linux_read,
+ .write = afs_linux_write,
+#ifdef HAVE_UNLOCKED_IOCTL
+ .unlocked_ioctl = afs_unlocked_xioctl,
#else
-struct file_operations afs_file_fops = {
- NULL, /* afs_linux_lseek */
- afs_linux_read,
- afs_linux_write,
- NULL, /* afs_linux_readdir */
- NULL, /* afs_linux_select */
- afs_xioctl, /* close enough to use the ported AFS one */
- afs_linux_mmap,
- afs_linux_open,
- afs_linux_flush,
- afs_linux_release,
- afs_linux_fsync,
- NULL, /* afs_linux_fasync */
- NULL, /* afs_linux_check_media_change */
- NULL, /* afs_linux_file_revalidate */
- afs_linux_lock,
-};
+ .ioctl = afs_xioctl,
+#endif
+#ifdef HAVE_COMPAT_IOCTL
+ .compat_ioctl = afs_unlocked_xioctl,
#endif
+ .mmap = afs_linux_mmap,
+ .open = afs_linux_open,
+ .flush = afs_linux_flush,
+#ifdef AFS_LINUX26_ENV
+ .sendfile = generic_file_sendfile,
+#endif
+ .release = afs_linux_release,
+ .fsync = afs_linux_fsync,
+ .lock = afs_linux_lock,
+};
/**********************************************************************
struct vcache *vcp = ITOAFS(dp->d_inode);
struct vcache *rootvp = NULL;
+#ifdef AFS_LINUX24_ENV
+ lock_kernel();
+#endif
AFS_GLOCK();
if (afs_fakestat_enable && vcp->mvstat == 1 && vcp->mvid
rootvp = afs_FindVCache(vcp->mvid, 0, 0);
ReleaseSharedLock(&afs_xvcache);
}
-#ifdef AFS_LINUX24_ENV
- lock_kernel();
-#endif
/* Make this a fast path (no crref), since it's called so often. */
if (vcp->states & CStatd) {
vcache2fakeinode(rootvp, vcp);
else
vcache2inode(vcp);
-#ifdef AFS_LINUX24_ENV
- unlock_kernel();
-#endif
if (rootvp)
afs_PutVCache(rootvp);
AFS_GUNLOCK();
+#ifdef AFS_LINUX24_ENV
+ unlock_kernel();
+#endif
return 0;
}
if (!code)
code = afs_VerifyVCache(vcp, &treq);
+ AFS_GUNLOCK();
#ifdef AFS_LINUX24_ENV
unlock_kernel();
#endif
- AFS_GUNLOCK();
crfree(credp);
return -code;
}
+#if defined(AFS_LINUX26_ENV)
+static int
+afs_linux_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
+{
+ int err = afs_linux_revalidate(dentry);
+ if (!err)
+ generic_fillattr(dentry->d_inode, stat);
+ return err;
+}
+#endif
/* Validate a dentry. Return 1 if unchanged, 0 if VFS layer should re-evaluate.
* In kernels 2.2.10 and above, we are passed an additional flags var which
* later on, we shouldn't have to do it until later. Perhaps in the future..
*/
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,10)
+#ifdef DOP_REVALIDATE_TAKES_NAMEIDATA
+static int
+afs_linux_dentry_revalidate(struct dentry *dp, struct nameidata *nd)
+#else
static int
afs_linux_dentry_revalidate(struct dentry *dp, int flags)
+#endif
#else
static int
afs_linux_dentry_revalidate(struct dentry *dp)
#endif
{
- char *name;
- cred_t *credp = crref();
+ cred_t *credp = NULL;
struct vrequest treq;
- struct vcache *lookupvcp = NULL;
- int code, bad_dentry = 1;
- struct sysname_info sysState;
- struct vcache *vcp = ITOAFS(dp->d_inode);
- struct vcache *parentvcp = ITOAFS(dp->d_parent->d_inode);
+ int code, bad_dentry;
+ struct vcache *vcp, *parentvcp;
- AFS_GLOCK();
+#ifdef AFS_LINUX24_ENV
lock_kernel();
+#endif
+ AFS_GLOCK();
- sysState.allocked = 0;
-
- /* If it's a negative dentry, then there's nothing to do. */
- if (!vcp || !parentvcp)
- goto done;
+ vcp = ITOAFS(dp->d_inode);
+ parentvcp = ITOAFS(dp->d_parent->d_inode); /* dget_parent()? */
- /* If it is the AFS root, then there's no chance it needs
- * revalidating */
- if (vcp == afs_globalVp) {
- bad_dentry = 0;
+ /* If it's a negative dentry, it's never valid */
+ if (!vcp || !parentvcp) {
+ bad_dentry = 1;
goto done;
}
- if ((code = afs_InitReq(&treq, credp)))
+ /* If it's @sys, perhaps it has been changed */
+ if (!afs_ENameOK(dp->d_name.name)) {
+ bad_dentry = 10;
goto done;
+ }
- Check_AtSys(parentvcp, dp->d_name.name, &sysState, &treq);
- name = sysState.name;
+ /* If it's the AFS root no chance it needs revalidating */
+ if (vcp == afs_globalVp)
+ goto good_dentry;
- /* First try looking up the DNLC */
- if ((lookupvcp = osi_dnlc_lookup(parentvcp, name, WRITE_LOCK))) {
- /* Verify that the dentry does not point to an old inode */
- if (vcp != lookupvcp)
- goto done;
- /* Check and correct mvid */
- if (*name != '/' && vcp->mvstat == 2)
- check_bad_parent(dp);
- vcache2inode(vcp);
- bad_dentry = 0;
+ /* Get a validated vcache entry */
+ credp = crref();
+ code = afs_InitReq(&treq, credp);
+ if (code) {
+ bad_dentry = 2;
+ goto done;
+ }
+ code = afs_VerifyVCache(vcp, &treq);
+ if (code) {
+ bad_dentry = 3;
goto done;
}
- /* A DNLC lookup failure cannot be trusted. Try a real lookup.
- Make sure to try the real name and not the @sys expansion;
- afs_lookup will expand @sys itself. */
-
- code = afs_lookup(parentvcp, dp->d_name.name, &lookupvcp, credp);
+ /* If we aren't the last looker, verify access */
+ if (vcp->last_looker != treq.uid) {
+ if (!afs_AccessOK(vcp, (vType(vcp) == VREG) ? PRSFS_READ : PRSFS_LOOKUP, &treq, CHECK_MODE_BITS)) {
+ bad_dentry = 5;
+ goto done;
+ }
- /* Verify that the dentry does not point to an old inode */
- if (vcp != lookupvcp)
- goto done;
+ vcp->last_looker = treq.uid;
+ }
+ good_dentry:
bad_dentry = 0;
done:
/* Clean up */
- if (lookupvcp)
- afs_PutVCache(lookupvcp);
- if (sysState.allocked)
- osi_FreeLargeSpace(name);
-
AFS_GUNLOCK();
- crfree(credp);
-
if (bad_dentry) {
shrink_dcache_parent(dp);
d_drop(dp);
}
+#ifdef AFS_LINUX24_ENV
unlock_kernel();
-
- return !bad_dentry;
-}
-
-#ifdef notdef
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,10)
-static int
-afs_linux_dentry_revalidate(struct dentry *dp, int flags)
-#else
-static int
-afs_linux_dentry_revalidate(struct dentry *dp)
#endif
-{
- int code;
- cred_t *credp;
- struct vrequest treq;
- struct inode *ip = AFSTOI(dp->d_inode);
-
- unsigned long timeout = 3 * HZ; /* 3 seconds */
-
- if (!ip)
- printk("negative dentry: %s\n", dp->d_name.name);
-
- if (!(flags & LOOKUP_CONTINUE)) {
- long diff = CURRENT_TIME - dp->d_parent->d_inode->i_mtime;
+ if (credp)
+ crfree(credp);
- if (diff < 15 * 60)
- timeout = 0;
- }
-
- if (time_after(jiffies, dp->d_time + timeout))
- goto out_bad;
-
- out_valid:
- return 1;
-
- out_bad:
- return 0;
+ return !bad_dentry;
}
-#endif
+#if !defined(AFS_LINUX26_ENV)
/* afs_dentry_iput */
static void
afs_dentry_iput(struct dentry *dp, struct inode *ip)
{
- if (ICL_SETACTIVE(afs_iclSetp)) {
- AFS_GLOCK();
- afs_Trace3(afs_iclSetp, CM_TRACE_DENTRYIPUT, ICL_TYPE_POINTER, ip,
- ICL_TYPE_STRING, dp->d_parent->d_name.name,
- ICL_TYPE_STRING, dp->d_name.name);
- AFS_GUNLOCK();
- }
-
osi_iput(ip);
}
+#endif
static int
afs_dentry_delete(struct dentry *dp)
{
- if (ICL_SETACTIVE(afs_iclSetp)) {
- AFS_GLOCK();
- afs_Trace3(afs_iclSetp, CM_TRACE_DENTRYDELETE, ICL_TYPE_POINTER,
- dp->d_inode, ICL_TYPE_STRING, dp->d_parent->d_name.name,
- ICL_TYPE_STRING, dp->d_name.name);
- AFS_GUNLOCK();
- }
-
if (dp->d_inode && (ITOAFS(dp->d_inode)->states & CUnlinked))
return 1; /* bad inode? */
return 0;
}
-#if defined(AFS_LINUX24_ENV)
struct dentry_operations afs_dentry_operations = {
- d_revalidate:afs_linux_dentry_revalidate,
- d_iput:afs_dentry_iput,
- d_delete:afs_dentry_delete,
-};
-struct dentry_operations *afs_dops = &afs_dentry_operations;
-#else
-struct dentry_operations afs_dentry_operations = {
- afs_linux_dentry_revalidate, /* d_validate(struct dentry *) */
- NULL, /* d_hash */
- NULL, /* d_compare */
- afs_dentry_delete, /* d_delete(struct dentry *) */
- NULL, /* d_release(struct dentry *) */
- afs_dentry_iput /* d_iput(struct dentry *, struct inode *) */
-};
-struct dentry_operations *afs_dops = &afs_dentry_operations;
+ .d_revalidate = afs_linux_dentry_revalidate,
+ .d_delete = afs_dentry_delete,
+#if !defined(AFS_LINUX26_ENV)
+ .d_iput = afs_dentry_iput,
#endif
+};
/**********************************************************************
* AFS Linux inode operations
*
* name is in kernel space at this point.
*/
+#ifdef IOP_CREATE_TAKES_NAMEIDATA
+int
+afs_linux_create(struct inode *dip, struct dentry *dp, int mode,
+ struct nameidata *nd)
+#else
int
afs_linux_create(struct inode *dip, struct dentry *dp, int mode)
+#endif
{
int code;
cred_t *credp = crref();
struct vattr vattr;
- enum vcexcl excl;
const char *name = dp->d_name.name;
struct inode *ip;
VATTR_NULL(&vattr);
vattr.va_mode = mode;
+#if defined(AFS_LINUX26_ENV)
+ lock_kernel();
+#endif
AFS_GLOCK();
code =
- afs_create(ITOAFS(dip), name, &vattr, NONEXCL, mode,
+ afs_create(ITOAFS(dip), (char *)name, &vattr, NONEXCL, mode,
(struct vcache **)&ip, credp);
if (!code) {
ip->i_op = &afs_symlink_iops;
#endif
- dp->d_op = afs_dops;
- dp->d_time = jiffies;
+ dp->d_op = &afs_dentry_operations;
d_instantiate(dp, ip);
}
AFS_GUNLOCK();
+#if defined(AFS_LINUX26_ENV)
+ unlock_kernel();
+#endif
crfree(credp);
return -code;
}
/* afs_linux_lookup */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,10)
+#ifdef IOP_LOOKUP_TAKES_NAMEIDATA
+struct dentry *
+afs_linux_lookup(struct inode *dip, struct dentry *dp,
+ struct nameidata *nd)
+#else
struct dentry *
afs_linux_lookup(struct inode *dip, struct dentry *dp)
+#endif
#else
int
afs_linux_lookup(struct inode *dip, struct dentry *dp)
cred_t *credp = crref();
struct vcache *vcp = NULL;
const char *comp = dp->d_name.name;
+
+#if defined(AFS_LINUX26_ENV)
+ lock_kernel();
+#endif
AFS_GLOCK();
code = afs_lookup(ITOAFS(dip), comp, &vcp, credp);
-
+ AFS_GUNLOCK();
+
if (vcp) {
struct inode *ip = AFSTOI(vcp);
/* Reset ops if symlink or directory. */
printk
("afs_linux_lookup: ip->i_mode 0x%x dp->d_name.name %s code %d\n",
ip->i_mode, dp->d_name.name, code);
+#ifdef STRUCT_INODE_HAS_I_SECURITY
+ if (ip->i_security == NULL) {
+ if (security_inode_alloc(ip))
+ panic("afs_linux_lookup: Cannot allocate inode security");
+ }
+#endif
#else
if (S_ISDIR(ip->i_mode))
ip->i_op = &afs_dir_iops;
ip->i_op = &afs_symlink_iops;
#endif
}
- dp->d_time = jiffies;
- dp->d_op = afs_dops;
+ dp->d_op = &afs_dentry_operations;
d_add(dp, AFSTOI(vcp));
- AFS_GUNLOCK();
+#if defined(AFS_LINUX26_ENV)
+ unlock_kernel();
+#endif
crfree(credp);
/* It's ok for the file to not be found. That's noted by the caller by
int
afs_linux_unlink(struct inode *dip, struct dentry *dp)
{
- int code;
+ int code = EBUSY;
cred_t *credp = crref();
const char *name = dp->d_name.name;
+ struct vcache *tvc = ITOAFS(dp->d_inode);
+
+#if defined(AFS_LINUX26_ENV)
+ lock_kernel();
+#endif
+ if (((VREFCOUNT(tvc) > 0) && tvc->opens > 0)
+ && !(tvc->states & CUnlinked)) {
+ struct dentry *__dp;
+ char *__name;
+ extern char *afs_newname();
+
+ __dp = NULL;
+ __name = NULL;
+ do {
+ dput(__dp);
+
+ AFS_GLOCK();
+ if (__name)
+ osi_FreeSmallSpace(__name);
+ __name = afs_newname();
+ AFS_GUNLOCK();
+
+ __dp = lookup_one_len(__name, dp->d_parent, strlen(__name));
+
+ if (IS_ERR(__dp))
+ goto out;
+ } while (__dp->d_inode != NULL);
+
+ AFS_GLOCK();
+ code = afs_rename(ITOAFS(dip), dp->d_name.name, ITOAFS(dip), __dp->d_name.name, credp);
+ if (!code) {
+ tvc->mvid = __name;
+ crhold(credp);
+ if (tvc->uncred) {
+ crfree(tvc->uncred);
+ }
+ tvc->uncred = credp;
+ tvc->states |= CUnlinked;
+ }
+ AFS_GUNLOCK();
+
+ if (!code)
+ d_move(dp, __dp);
+ dput(__dp);
+
+ goto out;
+ }
AFS_GLOCK();
code = afs_remove(ITOAFS(dip), name, credp);
AFS_GUNLOCK();
if (!code)
d_drop(dp);
+out:
+#if defined(AFS_LINUX26_ENV)
+ unlock_kernel();
+#endif
crfree(credp);
return -code;
}
struct vattr vattr;
const char *name = dp->d_name.name;
+#if defined(AFS_LINUX26_ENV)
+ lock_kernel();
+#endif
AFS_GLOCK();
VATTR_NULL(&vattr);
vattr.va_mask = ATTR_MODE;
vattr.va_mode = mode;
code = afs_mkdir(ITOAFS(dip), name, &vattr, &tvcp, credp);
+ AFS_GUNLOCK();
if (tvcp) {
tvcp->v.v_op = &afs_dir_iops;
#if defined(AFS_LINUX24_ENV)
tvcp->v.v_fop = &afs_dir_fops;
#endif
- dp->d_op = afs_dops;
- dp->d_time = jiffies;
+ dp->d_op = &afs_dentry_operations;
d_instantiate(dp, AFSTOI(tvcp));
}
- AFS_GUNLOCK();
+#if defined(AFS_LINUX26_ENV)
+ unlock_kernel();
+#endif
crfree(credp);
return -code;
}
cred_t *credp = crref();
const char *name = dp->d_name.name;
+#if defined(AFS_LINUX26_ENV)
+ lock_kernel();
+#endif
AFS_GLOCK();
code = afs_rmdir(ITOAFS(dip), name, credp);
+ AFS_GUNLOCK();
/* Linux likes to see ENOTEMPTY returned from an rmdir() syscall
* that failed because a directory is not empty. So, we map
d_drop(dp);
}
- AFS_GUNLOCK();
+#if defined(AFS_LINUX26_ENV)
+ unlock_kernel();
+#endif
crfree(credp);
return -code;
}
cred_t *credp = crref();
const char *oldname = olddp->d_name.name;
const char *newname = newdp->d_name.name;
+ struct dentry *rehash = NULL;
+#if defined(AFS_LINUX26_ENV)
+ /* Prevent any new references during rename operation. */
+ lock_kernel();
+#endif
/* Remove old and new entries from name hash. New one will change below.
* While it's optimal to catch failures and re-insert newdp into hash,
* it's also error prone and in that case we're already dealing with error
* cases. Let another lookup put things right, if need be.
*/
- if (!list_empty(&olddp->d_hash)) {
- d_drop(olddp);
+#if defined(AFS_LINUX26_ENV)
+ if (!d_unhashed(newdp)) {
+ d_drop(newdp);
+ rehash = newdp;
}
+#else
if (!list_empty(&newdp->d_hash)) {
d_drop(newdp);
+ rehash = newdp;
}
+#endif
+
+#if defined(AFS_LINUX24_ENV)
+ if (atomic_read(&olddp->d_count) > 1)
+ shrink_dcache_parent(olddp);
+#endif
+
AFS_GLOCK();
code = afs_rename(ITOAFS(oldip), oldname, ITOAFS(newip), newname, credp);
AFS_GUNLOCK();
- if (!code) {
- /* update time so it doesn't expire immediately */
- newdp->d_time = jiffies;
- d_move(olddp, newdp);
- }
+ if (rehash)
+ d_rehash(rehash);
+
+#if defined(AFS_LINUX26_ENV)
+ unlock_kernel();
+#endif
crfree(credp);
return -code;
uio_t tuio;
struct iovec iovec;
struct inode *ip = FILE_INODE(fp);
- int cnt = atomic_read(&pp->count);
+ int cnt = page_count(pp);
struct vcache *avc = ITOAFS(ip);
- AFS_GLOCK();
- afs_Trace4(afs_iclSetp, CM_TRACE_READPAGE, ICL_TYPE_POINTER, ip, ICL_TYPE_POINTER, pp, ICL_TYPE_INT32, cnt, ICL_TYPE_INT32, 99999); /* not a possible code value */
+
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
address = kmap(pp);
ClearPageError(pp);
-
- lock_kernel();
#else
atomic_add(1, &pp->count);
set_bit(PG_locked, &pp->flags); /* other bits? See mm.h */
setup_uio(&tuio, &iovec, (char *)address, offset, PAGESIZE, UIO_READ,
AFS_UIOSYS);
+#ifdef AFS_LINUX24_ENV
+ lock_kernel();
+#endif
+ AFS_GLOCK();
+ afs_Trace4(afs_iclSetp, CM_TRACE_READPAGE, ICL_TYPE_POINTER, ip, ICL_TYPE_POINTER, pp, ICL_TYPE_INT32, cnt, ICL_TYPE_INT32, 99999); /* not a possible code value */
code = afs_rdwr(avc, &tuio, UIO_READ, 0, credp);
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ afs_Trace4(afs_iclSetp, CM_TRACE_READPAGE, ICL_TYPE_POINTER, ip,
+ ICL_TYPE_POINTER, pp, ICL_TYPE_INT32, cnt, ICL_TYPE_INT32,
+ code);
+ AFS_GUNLOCK();
+#ifdef AFS_LINUX24_ENV
unlock_kernel();
#endif
set_bit(PG_uptodate, &pp->flags);
#endif
}
+
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
kunmap(pp);
UnlockPage(pp);
struct dcache *tdc;
struct vrequest treq;
+ AFS_GLOCK();
code = afs_InitReq(&treq, credp);
if (!code && !NBObtainWriteLock(&avc->lock, 534)) {
tdc = afs_FindDCache(avc, offset);
}
ReleaseWriteLock(&avc->lock);
}
+ AFS_GUNLOCK();
}
crfree(credp);
- afs_Trace4(afs_iclSetp, CM_TRACE_READPAGE, ICL_TYPE_POINTER, ip,
- ICL_TYPE_POINTER, pp, ICL_TYPE_INT32, cnt, ICL_TYPE_INT32,
- code);
- AFS_GUNLOCK();
return -code;
}
#if defined(AFS_LINUX24_ENV)
+#ifdef AOP_WRITEPAGE_TAKES_WRITEBACK_CONTROL
+int
+afs_linux_writepage(struct page *pp, struct writeback_control *wbc)
+#else
int
afs_linux_writepage(struct page *pp)
+#endif
{
struct address_space *mapping = pp->mapping;
struct inode *inode;
unsigned offset = PAGE_CACHE_SIZE;
long status;
+#if defined(AFS_LINUX26_ENV)
+ if (PageReclaim(pp)) {
+ return WRITEPAGE_ACTIVATE;
+ }
+#else
+ if (PageLaunder(pp)) {
+ return(fail_writepage(pp));
+ }
+#endif
+
inode = (struct inode *)mapping->host;
end_index = inode->i_size >> PAGE_CACHE_SHIFT;
if (pp->index >= end_index + 1 || !offset)
return -EIO;
do_it:
- AFS_GLOCK();
status = afs_linux_writepage_sync(inode, pp, 0, offset);
- AFS_GUNLOCK();
SetPageUptodate(pp);
UnlockPage(pp);
if (status == offset)
}
#endif
-#ifdef NOTUSED
-/* afs_linux_bmap - supports generic_readpage, but we roll our own. */
-int
-afs_linux_bmap(struct inode *ip, int)
-{
- return -EINVAL;
-}
-
-/* afs_linux_truncate
- * Handles discarding disk blocks if this were a device. ext2 indicates we
- * may need to zero partial last pages of memory mapped files.
- */
-void
-afs_linux_truncate(struct inode *ip)
-{
-}
-#endif
-
/* afs_linux_permission
* Check access rights - returns error if can't check or permission denied.
*/
+#ifdef IOP_PERMISSION_TAKES_NAMEIDATA
+int
+afs_linux_permission(struct inode *ip, int mode, struct nameidata *nd)
+#else
int
afs_linux_permission(struct inode *ip, int mode)
+#endif
{
int code;
cred_t *credp = crref();
}
-#ifdef NOTUSED
-/* msdos sector mapping hack for memory mapping. */
-int
-afs_linux_smap(struct inode *ip, int)
-{
- return -EINVAL;
-}
-#endif
-
#if defined(AFS_LINUX24_ENV)
int
afs_linux_writepage_sync(struct inode *ip, struct page *pp,
base = (pp->index << PAGE_CACHE_SHIFT) + offset;
credp = crref();
+ lock_kernel();
+ AFS_GLOCK();
afs_Trace4(afs_iclSetp, CM_TRACE_UPDATEPAGE, ICL_TYPE_POINTER, vcp,
- ICL_TYPE_POINTER, pp, ICL_TYPE_INT32, atomic_read(&pp->count),
+ ICL_TYPE_POINTER, pp, ICL_TYPE_INT32, page_count(pp),
ICL_TYPE_INT32, 99999);
setup_uio(&tuio, &iovec, buffer, base, count, UIO_WRITE, AFS_UIOSYS);
code = code ? -code : count - tuio.uio_resid;
afs_Trace4(afs_iclSetp, CM_TRACE_UPDATEPAGE, ICL_TYPE_POINTER, vcp,
- ICL_TYPE_POINTER, pp, ICL_TYPE_INT32, atomic_read(&pp->count),
+ ICL_TYPE_POINTER, pp, ICL_TYPE_INT32, page_count(pp),
ICL_TYPE_INT32, code);
+ AFS_GUNLOCK();
+ unlock_kernel();
crfree(credp);
kunmap(pp);
return code;
}
-static int
-afs_linux_updatepage(struct file *file, struct page *page,
- unsigned long offset, unsigned int count)
-{
- struct dentry *dentry = file->f_dentry;
-
- return afs_linux_writepage_sync(dentry->d_inode, page, offset, count);
-}
#else
/* afs_linux_updatepage
* What one would have thought was writepage - write dirty page to file.
credp = crref();
AFS_GLOCK();
afs_Trace4(afs_iclSetp, CM_TRACE_UPDATEPAGE, ICL_TYPE_POINTER, vcp,
- ICL_TYPE_POINTER, pp, ICL_TYPE_INT32, atomic_read(&pp->count),
+ ICL_TYPE_POINTER, pp, ICL_TYPE_INT32, page_count(pp),
ICL_TYPE_INT32, 99999);
setup_uio(&tuio, &iovec, page_addr + offset,
(afs_offs_t) (pageoff(pp) + offset), count, UIO_WRITE,
code = code ? -code : count - tuio.uio_resid;
afs_Trace4(afs_iclSetp, CM_TRACE_UPDATEPAGE, ICL_TYPE_POINTER, vcp,
- ICL_TYPE_POINTER, pp, ICL_TYPE_INT32, atomic_read(&pp->count),
+ ICL_TYPE_POINTER, pp, ICL_TYPE_INT32, page_count(pp),
ICL_TYPE_INT32, code);
AFS_GUNLOCK();
{
int code;
- AFS_GLOCK();
- lock_kernel();
- code = afs_linux_updatepage(file, page, offset, to - offset);
- unlock_kernel();
- AFS_GUNLOCK();
+ code = afs_linux_writepage_sync(file->f_dentry->d_inode, page,
+ offset, to - offset);
+#if !defined(AFS_LINUX26_ENV)
kunmap(page);
+#endif
return code;
}
afs_linux_prepare_write(struct file *file, struct page *page, unsigned from,
unsigned to)
{
+/* sometime between 2.4.0 and 2.4.19, the callers of prepare_write began to
+ call kmap directly instead of relying on us to do it */
+#if !defined(AFS_LINUX26_ENV)
kmap(page);
+#endif
return 0;
}
extern int afs_notify_change(struct dentry *dp, struct iattr *iattrp);
#endif
-#if defined(AFS_LINUX24_ENV)
struct inode_operations afs_file_iops = {
- revalidate:afs_linux_revalidate,
- setattr:afs_notify_change,
- permission:afs_linux_permission,
-};
-struct address_space_operations afs_file_aops = {
- readpage:afs_linux_readpage,
- writepage:afs_linux_writepage,
- commit_write:afs_linux_commit_write,
- prepare_write:afs_linux_prepare_write,
-};
-
-struct inode_operations *afs_ops = &afs_file_iops;
+#if defined(AFS_LINUX26_ENV)
+ .permission = afs_linux_permission,
+ .getattr = afs_linux_getattr,
+ .setattr = afs_notify_change,
+#elif defined(AFS_LINUX24_ENV)
+ .permission = afs_linux_permission,
+ .revalidate = afs_linux_revalidate,
+ .setattr = afs_notify_change,
#else
-struct inode_operations afs_iops = {
- &afs_file_fops, /* file operations */
- NULL, /* afs_linux_create */
- NULL, /* afs_linux_lookup */
- NULL, /* afs_linux_link */
- NULL, /* afs_linux_unlink */
- NULL, /* afs_linux_symlink */
- NULL, /* afs_linux_mkdir */
- NULL, /* afs_linux_rmdir */
- NULL, /* afs_linux_mknod */
- NULL, /* afs_linux_rename */
- NULL, /* afs_linux_readlink */
- NULL, /* afs_linux_follow_link */
- afs_linux_readpage,
- NULL, /* afs_linux_writepage */
- NULL, /* afs_linux_bmap */
- NULL, /* afs_linux_truncate */
- afs_linux_permission,
- NULL, /* afs_linux_smap */
- afs_linux_updatepage,
- afs_linux_revalidate,
+ .default_file_ops = &afs_file_fops,
+ .readpage = afs_linux_readpage,
+ .revalidate = afs_linux_revalidate,
+ .updatepage = afs_linux_updatepage,
+#endif
};
-struct inode_operations *afs_ops = &afs_iops;
+#if defined(AFS_LINUX24_ENV)
+struct address_space_operations afs_file_aops = {
+ .readpage = afs_linux_readpage,
+ .writepage = afs_linux_writepage,
+ .commit_write = afs_linux_commit_write,
+ .prepare_write = afs_linux_prepare_write,
+};
#endif
+
/* Separate ops vector for directories. Linux 2.2 tests type of inode
* by what sort of operation is allowed.....
*/
-#if defined(AFS_LINUX24_ENV)
+
struct inode_operations afs_dir_iops = {
- create:afs_linux_create,
- lookup:afs_linux_lookup,
- link:afs_linux_link,
- unlink:afs_linux_unlink,
- symlink:afs_linux_symlink,
- mkdir:afs_linux_mkdir,
- rmdir:afs_linux_rmdir,
- rename:afs_linux_rename,
- revalidate:afs_linux_revalidate,
- setattr:afs_notify_change,
- permission:afs_linux_permission,
-};
+#if !defined(AFS_LINUX24_ENV)
+ .default_file_ops = &afs_dir_fops,
#else
-struct inode_operations afs_dir_iops = {
- &afs_dir_fops, /* file operations for directories */
- afs_linux_create,
- afs_linux_lookup,
- afs_linux_link,
- afs_linux_unlink,
- afs_linux_symlink,
- afs_linux_mkdir,
- afs_linux_rmdir,
- NULL, /* afs_linux_mknod */
- afs_linux_rename,
- NULL, /* afs_linux_readlink */
- NULL, /* afs_linux_follow_link */
- NULL, /* afs_linux_readpage */
- NULL, /* afs_linux_writepage */
- NULL, /* afs_linux_bmap */
- NULL, /* afs_linux_truncate */
- afs_linux_permission,
- NULL, /* afs_linux_smap */
- NULL, /* afs_linux_updatepage */
- afs_linux_revalidate,
-};
+ .setattr = afs_notify_change,
#endif
+ .create = afs_linux_create,
+ .lookup = afs_linux_lookup,
+ .link = afs_linux_link,
+ .unlink = afs_linux_unlink,
+ .symlink = afs_linux_symlink,
+ .mkdir = afs_linux_mkdir,
+ .rmdir = afs_linux_rmdir,
+ .rename = afs_linux_rename,
+#if defined(AFS_LINUX26_ENV)
+ .getattr = afs_linux_getattr,
+#else
+ .revalidate = afs_linux_revalidate,
+#endif
+ .permission = afs_linux_permission,
+};
/* We really need a separate symlink set of ops, since do_follow_link()
* determines if it _is_ a link by checking if the follow_link op is set.
char *p = (char *)kmap(page);
int code;
- AFS_GLOCK();
lock_kernel();
+ AFS_GLOCK();
code = afs_linux_ireadlink(ip, p, PAGE_SIZE, AFS_UIOSYS);
+ AFS_GUNLOCK();
if (code < 0)
goto fail;
p[code] = '\0'; /* null terminate? */
unlock_kernel();
- AFS_GUNLOCK();
SetPageUptodate(page);
kunmap(page);
fail:
unlock_kernel();
- AFS_GUNLOCK();
SetPageError(page);
kunmap(page);
}
struct address_space_operations afs_symlink_aops = {
- readpage:afs_symlink_filler
+ .readpage = afs_symlink_filler
};
+#endif
struct inode_operations afs_symlink_iops = {
- readlink:page_readlink,
- follow_link:page_follow_link,
- setattr:afs_notify_change,
-};
+#if defined(AFS_LINUX24_ENV)
+ .readlink = page_readlink,
+#if defined(HAVE_KERNEL_PAGE_FOLLOW_LINK)
+ .follow_link = page_follow_link,
#else
-struct inode_operations afs_symlink_iops = {
- NULL, /* file operations */
- NULL, /* create */
- NULL, /* lookup */
- NULL, /* link */
- NULL, /* unlink */
- NULL, /* symlink */
- NULL, /* mkdir */
- NULL, /* rmdir */
- NULL, /* afs_linux_mknod */
- NULL, /* rename */
- afs_linux_readlink,
- afs_linux_follow_link,
- NULL, /* readpage */
- NULL, /* afs_linux_writepage */
- NULL, /* afs_linux_bmap */
- NULL, /* afs_linux_truncate */
- afs_linux_permission, /* tho the code appears to indicate not used? */
- NULL, /* afs_linux_smap */
- NULL, /* updatepage */
- afs_linux_revalidate, /* tho the code appears to indicate not used? */
-};
+ .follow_link = page_follow_link_light,
+ .put_link = page_put_link,
#endif
+ .setattr = afs_notify_change,
+#else
+ .readlink = afs_linux_readlink,
+ .follow_link = afs_linux_follow_link,
+ .permission = afs_linux_permission,
+ .revalidate = afs_linux_revalidate,
+#endif
+};
git://git.openafs.org / openafs.git / blobdiff