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Linux Compat: inode->i_mutex/i_sem

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Create spl_inode_lock/spl_inode_unlock compability macros to simply
access to the inode mutex/sem.  This avoids the need to have to ugly
up the code with the required #define's at every call site.  At the
moment the SPL only uses this in one place but higher layers can
benefit from the macro.
This commit is contained in:
Brian Behlendorf 2011-01-10 12:35:22 -08:00
parent b7dc313837
commit 6bf4d76f47
2 changed files with 14 additions and 11 deletions
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12
include/linux/file_compat.h
View File

@ -51,11 +51,21 @@ spl_filp_open(const char *name, int flags, int mode, int *err)
#define spl_filp_write(fp, b, s, p) (fp)->f_op->write((fp), (b), (s), p)
#ifdef HAVE_3ARGS_FILE_FSYNC
#define spl_filp_fsync(fp, sync) (fp)->f_op->fsync((fp), \
#define spl_filp_fsync(fp, sync) (fp)->f_op->fsync((fp), \
(fp)->f_dentry, sync)
#else
#define spl_filp_fsync(fp, sync) (fp)->f_op->fsync((fp), sync)
#endif
#ifdef HAVE_INODE_I_MUTEX
#define spl_inode_lock(ip) (mutex_lock(&(ip)->i_mutex))
#define spl_inode_lock_nested(ip, type) (mutex_lock_nested((&(ip)->i_mutex), \
(type)))
#define spl_inode_unlock(ip) (mutex_unlock(&(ip)->i_mutex))
#else
#define spl_inode_lock(ip) (down(&(ip)->i_sem))
#define spl_inode_unlock(ip) (up(&(ip)->i_sem))
#endif /* HAVE_INODE_I_MUTEX */
#endif /* SPL_FILE_COMPAT_H */

13
module/spl/spl-vnode.c
View File

@ -295,11 +295,7 @@ vn_remove(const char *path, uio_seg_t seg, int flags)
if (nd.last_type != LAST_NORM)
SGOTO(exit1, rc);
#ifdef HAVE_INODE_I_MUTEX
mutex_lock_nested(&nd.nd_dentry->d_inode->i_mutex, I_MUTEX_PARENT);
#else
down(&nd.nd_dentry->d_inode->i_sem);
#endif /* HAVE_INODE_I_MUTEX */
spl_inode_lock_nested(nd.nd_dentry->d_inode, I_MUTEX_PARENT);
dentry = vn_lookup_hash(&nd);
rc = PTR_ERR(dentry);
if (!IS_ERR(dentry)) {
@ -318,11 +314,8 @@ vn_remove(const char *path, uio_seg_t seg, int flags)
exit2:
dput(dentry);
}
#ifdef HAVE_INODE_I_MUTEX
mutex_unlock(&nd.nd_dentry->d_inode->i_mutex);
#else
up(&nd.nd_dentry->d_inode->i_sem);
#endif /* HAVE_INODE_I_MUTEX */
spl_inode_unlock(nd.nd_dentry->d_inode);
if (inode)
iput(inode); /* truncate the inode here */
exit1: