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NFSv2/v3: Fix error handling in nfs_atomic_open_v23()

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[ Upstream commit 85d2c2392a ]

When nfs_do_create() returns an EEXIST error, it means that a regular
file could not be created. That could mean that a symlink needs to be
resolved. If that's the case, a lookup needs to be kicked off.

Reported-by: Stephen Abbene <sabbene87@gmail.com>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=220710
Fixes: 7c6c5249f0 ("NFS: add atomic_open for NFSv3 to handle O_TRUNC correctly.")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Trond Myklebust
2025-10-28 17:27:43 -04:00
committed by Greg Kroah-Hartman
parent 7da2c13e73
commit bd4064f18d
1 changed files with 4 additions and 3 deletions
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7
fs/nfs/dir.c
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@@ -2280,11 +2280,12 @@ int nfs_atomic_open_v23(struct inode *dir, struct dentry *dentry,
return -ENAMETOOLONG;
if (open_flags & O_CREAT) {
file->f_mode |= FMODE_CREATED;
error = nfs_do_create(dir, dentry, mode, open_flags);
if (error)
return error;
if (!error) {
file->f_mode |= FMODE_CREATED;
return finish_open(file, dentry, NULL);
} else if (error != -EEXIST || open_flags & O_EXCL)
return error;
}
if (d_in_lookup(dentry)) {
/* The only flags nfs_lookup considers are